Version:  2.0.40 2.2.26 2.4.37 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6

Linux/drivers/usb/serial/io_ti.c

  1 /*
  2  * Edgeport USB Serial Converter driver
  3  *
  4  * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved.
  5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
  6  *
  7  *      This program is free software; you can redistribute it and/or modify
  8  *      it under the terms of the GNU General Public License as published by
  9  *      the Free Software Foundation; either version 2 of the License, or
 10  *      (at your option) any later version.
 11  *
 12  * Supports the following devices:
 13  *      EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
 14  *
 15  * For questions or problems with this driver, contact Inside Out
 16  * Networks technical support, or Peter Berger <pberger@brimson.com>,
 17  * or Al Borchers <alborchers@steinerpoint.com>.
 18  */
 19 
 20 #include <linux/kernel.h>
 21 #include <linux/jiffies.h>
 22 #include <linux/errno.h>
 23 #include <linux/slab.h>
 24 #include <linux/tty.h>
 25 #include <linux/tty_driver.h>
 26 #include <linux/tty_flip.h>
 27 #include <linux/module.h>
 28 #include <linux/spinlock.h>
 29 #include <linux/mutex.h>
 30 #include <linux/serial.h>
 31 #include <linux/swab.h>
 32 #include <linux/kfifo.h>
 33 #include <linux/ioctl.h>
 34 #include <linux/firmware.h>
 35 #include <linux/uaccess.h>
 36 #include <linux/usb.h>
 37 #include <linux/usb/serial.h>
 38 
 39 #include "io_16654.h"
 40 #include "io_usbvend.h"
 41 #include "io_ti.h"
 42 
 43 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
 44 #define DRIVER_DESC "Edgeport USB Serial Driver"
 45 
 46 #define EPROM_PAGE_SIZE         64
 47 
 48 
 49 /* different hardware types */
 50 #define HARDWARE_TYPE_930       0
 51 #define HARDWARE_TYPE_TIUMP     1
 52 
 53 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
 54 #define TI_MODE_CONFIGURING     0   /* Device has not entered start device */
 55 #define TI_MODE_BOOT            1   /* Staying in boot mode                */
 56 #define TI_MODE_DOWNLOAD        2   /* Made it to download mode            */
 57 #define TI_MODE_TRANSITIONING   3   /*
 58                                      * Currently in boot mode but
 59                                      * transitioning to download mode
 60                                      */
 61 
 62 /* read urb state */
 63 #define EDGE_READ_URB_RUNNING   0
 64 #define EDGE_READ_URB_STOPPING  1
 65 #define EDGE_READ_URB_STOPPED   2
 66 
 67 #define EDGE_CLOSING_WAIT       4000    /* in .01 sec */
 68 
 69 
 70 /* Product information read from the Edgeport */
 71 struct product_info {
 72         int     TiMode;                 /* Current TI Mode  */
 73         __u8    hardware_type;          /* Type of hardware */
 74 } __attribute__((packed));
 75 
 76 /*
 77  * Edgeport firmware header
 78  *
 79  * "build_number" has been set to 0 in all three of the images I have
 80  * seen, and Digi Tech Support suggests that it is safe to ignore it.
 81  *
 82  * "length" is the number of bytes of actual data following the header.
 83  *
 84  * "checksum" is the low order byte resulting from adding the values of
 85  * all the data bytes.
 86  */
 87 struct edgeport_fw_hdr {
 88         u8 major_version;
 89         u8 minor_version;
 90         __le16 build_number;
 91         __le16 length;
 92         u8 checksum;
 93 } __packed;
 94 
 95 struct edgeport_port {
 96         __u16 uart_base;
 97         __u16 dma_address;
 98         __u8 shadow_msr;
 99         __u8 shadow_mcr;
100         __u8 shadow_lsr;
101         __u8 lsr_mask;
102         __u32 ump_read_timeout;         /*
103                                          * Number of milliseconds the UMP will
104                                          * wait without data before completing
105                                          * a read short
106                                          */
107         int baud_rate;
108         int close_pending;
109         int lsr_event;
110 
111         struct edgeport_serial  *edge_serial;
112         struct usb_serial_port  *port;
113         __u8 bUartMode;         /* Port type, 0: RS232, etc. */
114         spinlock_t ep_lock;
115         int ep_read_urb_state;
116         int ep_write_urb_in_use;
117 };
118 
119 struct edgeport_serial {
120         struct product_info product_info;
121         u8 TI_I2C_Type;                 /* Type of I2C in UMP */
122         u8 TiReadI2C;                   /*
123                                          * Set to TRUE if we have read the
124                                          * I2c in Boot Mode
125                                          */
126         struct mutex es_lock;
127         int num_ports_open;
128         struct usb_serial *serial;
129         struct delayed_work heartbeat_work;
130         int fw_version;
131         bool use_heartbeat;
132 };
133 
134 
135 /* Devices that this driver supports */
136 static const struct usb_device_id edgeport_1port_id_table[] = {
137         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
138         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
139         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
140         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
141         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
142         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
143         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
144         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
145         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
146         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
147         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
148         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
149         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
150         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
151         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
152         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
153         { }
154 };
155 
156 static const struct usb_device_id edgeport_2port_id_table[] = {
157         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
158         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
159         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
160         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
161         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
162         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
163         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
164         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
165         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
166         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
167         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
168         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
169         /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
170         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
171         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
172         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
173         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
174         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
175         { }
176 };
177 
178 /* Devices that this driver supports */
179 static const struct usb_device_id id_table_combined[] = {
180         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
181         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
182         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
183         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
184         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
185         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
186         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
187         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
188         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
189         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
190         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
191         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
192         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
193         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
194         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
195         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
196         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
197         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
198         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
199         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
200         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
201         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
202         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
203         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
204         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
205         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
206         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
207         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
208         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
209         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
210         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
211         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
212         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
213         { }
214 };
215 
216 MODULE_DEVICE_TABLE(usb, id_table_combined);
217 
218 static int closing_wait = EDGE_CLOSING_WAIT;
219 static bool ignore_cpu_rev;
220 static int default_uart_mode;           /* RS232 */
221 
222 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
223                 int length);
224 
225 static void stop_read(struct edgeport_port *edge_port);
226 static int restart_read(struct edgeport_port *edge_port);
227 
228 static void edge_set_termios(struct tty_struct *tty,
229                 struct usb_serial_port *port, struct ktermios *old_termios);
230 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty);
231 
232 static int do_download_mode(struct edgeport_serial *serial,
233                 const struct firmware *fw);
234 static int do_boot_mode(struct edgeport_serial *serial,
235                 const struct firmware *fw);
236 
237 /* sysfs attributes */
238 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
239 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
240 
241 /*
242  * Some release of Edgeport firmware "down3.bin" after version 4.80
243  * introduced code to automatically disconnect idle devices on some
244  * Edgeport models after periods of inactivity, typically ~60 seconds.
245  * This occurs without regard to whether ports on the device are open
246  * or not.  Digi International Tech Support suggested:
247  *
248  * 1.  Adding driver "heartbeat" code to reset the firmware timer by
249  *     requesting a descriptor record every 15 seconds, which should be
250  *     effective with newer firmware versions that require it, and benign
251  *     with older versions that do not. In practice 40 seconds seems often
252  *     enough.
253  * 2.  The heartbeat code is currently required only on Edgeport/416 models.
254  */
255 #define FW_HEARTBEAT_VERSION_CUTOFF ((4 << 8) + 80)
256 #define FW_HEARTBEAT_SECS 40
257 
258 /* Timeouts in msecs: firmware downloads take longer */
259 #define TI_VSEND_TIMEOUT_DEFAULT 1000
260 #define TI_VSEND_TIMEOUT_FW_DOWNLOAD 10000
261 
262 static int ti_vread_sync(struct usb_device *dev, __u8 request,
263                                 __u16 value, __u16 index, u8 *data, int size)
264 {
265         int status;
266 
267         status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
268                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
269                         value, index, data, size, 1000);
270         if (status < 0)
271                 return status;
272         if (status != size) {
273                 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
274                         __func__, size, status);
275                 return -ECOMM;
276         }
277         return 0;
278 }
279 
280 static int ti_vsend_sync(struct usb_device *dev, u8 request, u16 value,
281                 u16 index, u8 *data, int size, int timeout)
282 {
283         int status;
284 
285         status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
286                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
287                         value, index, data, size, timeout);
288         if (status < 0)
289                 return status;
290         if (status != size) {
291                 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
292                         __func__, size, status);
293                 return -ECOMM;
294         }
295         return 0;
296 }
297 
298 static int send_cmd(struct usb_device *dev, __u8 command,
299                                 __u8 moduleid, __u16 value, u8 *data,
300                                 int size)
301 {
302         return ti_vsend_sync(dev, command, value, moduleid, data, size,
303                         TI_VSEND_TIMEOUT_DEFAULT);
304 }
305 
306 /* clear tx/rx buffers and fifo in TI UMP */
307 static int purge_port(struct usb_serial_port *port, __u16 mask)
308 {
309         int port_number = port->port_number;
310 
311         dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask);
312 
313         return send_cmd(port->serial->dev,
314                                         UMPC_PURGE_PORT,
315                                         (__u8)(UMPM_UART1_PORT + port_number),
316                                         mask,
317                                         NULL,
318                                         0);
319 }
320 
321 /**
322  * read_download_mem - Read edgeport memory from TI chip
323  * @dev: usb device pointer
324  * @start_address: Device CPU address at which to read
325  * @length: Length of above data
326  * @address_type: Can read both XDATA and I2C
327  * @buffer: pointer to input data buffer
328  */
329 static int read_download_mem(struct usb_device *dev, int start_address,
330                                 int length, __u8 address_type, __u8 *buffer)
331 {
332         int status = 0;
333         __u8 read_length;
334         u16 be_start_address;
335 
336         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length);
337 
338         /*
339          * Read in blocks of 64 bytes
340          * (TI firmware can't handle more than 64 byte reads)
341          */
342         while (length) {
343                 if (length > 64)
344                         read_length = 64;
345                 else
346                         read_length = (__u8)length;
347 
348                 if (read_length > 1) {
349                         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length);
350                 }
351                 /*
352                  * NOTE: Must use swab as wIndex is sent in little-endian
353                  *       byte order regardless of host byte order.
354                  */
355                 be_start_address = swab16((u16)start_address);
356                 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
357                                         (__u16)address_type,
358                                         be_start_address,
359                                         buffer, read_length);
360 
361                 if (status) {
362                         dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status);
363                         return status;
364                 }
365 
366                 if (read_length > 1)
367                         usb_serial_debug_data(&dev->dev, __func__, read_length, buffer);
368 
369                 /* Update pointers/length */
370                 start_address += read_length;
371                 buffer += read_length;
372                 length -= read_length;
373         }
374 
375         return status;
376 }
377 
378 static int read_ram(struct usb_device *dev, int start_address,
379                                                 int length, __u8 *buffer)
380 {
381         return read_download_mem(dev, start_address, length,
382                                         DTK_ADDR_SPACE_XDATA, buffer);
383 }
384 
385 /* Read edgeport memory to a given block */
386 static int read_boot_mem(struct edgeport_serial *serial,
387                                 int start_address, int length, __u8 *buffer)
388 {
389         int status = 0;
390         int i;
391 
392         for (i = 0; i < length; i++) {
393                 status = ti_vread_sync(serial->serial->dev,
394                                 UMPC_MEMORY_READ, serial->TI_I2C_Type,
395                                 (__u16)(start_address+i), &buffer[i], 0x01);
396                 if (status) {
397                         dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status);
398                         return status;
399                 }
400         }
401 
402         dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n",
403                 __func__, start_address, length);
404         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
405 
406         serial->TiReadI2C = 1;
407 
408         return status;
409 }
410 
411 /* Write given block to TI EPROM memory */
412 static int write_boot_mem(struct edgeport_serial *serial,
413                                 int start_address, int length, __u8 *buffer)
414 {
415         int status = 0;
416         int i;
417         u8 *temp;
418 
419         /* Must do a read before write */
420         if (!serial->TiReadI2C) {
421                 temp = kmalloc(1, GFP_KERNEL);
422                 if (!temp)
423                         return -ENOMEM;
424 
425                 status = read_boot_mem(serial, 0, 1, temp);
426                 kfree(temp);
427                 if (status)
428                         return status;
429         }
430 
431         for (i = 0; i < length; ++i) {
432                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
433                                 buffer[i], (u16)(i + start_address), NULL,
434                                 0, TI_VSEND_TIMEOUT_DEFAULT);
435                 if (status)
436                         return status;
437         }
438 
439         dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length);
440         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
441 
442         return status;
443 }
444 
445 /* Write edgeport I2C memory to TI chip */
446 static int write_i2c_mem(struct edgeport_serial *serial,
447                 int start_address, int length, __u8 address_type, __u8 *buffer)
448 {
449         struct device *dev = &serial->serial->dev->dev;
450         int status = 0;
451         int write_length;
452         u16 be_start_address;
453 
454         /* We can only send a maximum of 1 aligned byte page at a time */
455 
456         /* calculate the number of bytes left in the first page */
457         write_length = EPROM_PAGE_SIZE -
458                                 (start_address & (EPROM_PAGE_SIZE - 1));
459 
460         if (write_length > length)
461                 write_length = length;
462 
463         dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n",
464                 __func__, start_address, write_length);
465         usb_serial_debug_data(dev, __func__, write_length, buffer);
466 
467         /*
468          * Write first page.
469          *
470          * NOTE: Must use swab as wIndex is sent in little-endian byte order
471          *       regardless of host byte order.
472          */
473         be_start_address = swab16((u16)start_address);
474         status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
475                                 (u16)address_type, be_start_address,
476                                 buffer, write_length, TI_VSEND_TIMEOUT_DEFAULT);
477         if (status) {
478                 dev_dbg(dev, "%s - ERROR %d\n", __func__, status);
479                 return status;
480         }
481 
482         length          -= write_length;
483         start_address   += write_length;
484         buffer          += write_length;
485 
486         /*
487          * We should be aligned now -- can write max page size bytes at a
488          * time.
489          */
490         while (length) {
491                 if (length > EPROM_PAGE_SIZE)
492                         write_length = EPROM_PAGE_SIZE;
493                 else
494                         write_length = length;
495 
496                 dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n",
497                         __func__, start_address, write_length);
498                 usb_serial_debug_data(dev, __func__, write_length, buffer);
499 
500                 /*
501                  * Write next page.
502                  *
503                  * NOTE: Must use swab as wIndex is sent in little-endian byte
504                  *       order regardless of host byte order.
505                  */
506                 be_start_address = swab16((u16)start_address);
507                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
508                                 (u16)address_type, be_start_address, buffer,
509                                 write_length, TI_VSEND_TIMEOUT_DEFAULT);
510                 if (status) {
511                         dev_err(dev, "%s - ERROR %d\n", __func__, status);
512                         return status;
513                 }
514 
515                 length          -= write_length;
516                 start_address   += write_length;
517                 buffer          += write_length;
518         }
519         return status;
520 }
521 
522 /*
523  * Examine the UMP DMA registers and LSR
524  *
525  * Check the MSBit of the X and Y DMA byte count registers.
526  * A zero in this bit indicates that the TX DMA buffers are empty
527  * then check the TX Empty bit in the UART.
528  */
529 static int tx_active(struct edgeport_port *port)
530 {
531         int status;
532         struct out_endpoint_desc_block *oedb;
533         __u8 *lsr;
534         int bytes_left = 0;
535 
536         oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
537         if (!oedb)
538                 return -ENOMEM;
539 
540         /*
541          * Sigh, that's right, just one byte, as not all platforms can
542          * do DMA from stack
543          */
544         lsr = kmalloc(1, GFP_KERNEL);
545         if (!lsr) {
546                 kfree(oedb);
547                 return -ENOMEM;
548         }
549         /* Read the DMA Count Registers */
550         status = read_ram(port->port->serial->dev, port->dma_address,
551                                                 sizeof(*oedb), (void *)oedb);
552         if (status)
553                 goto exit_is_tx_active;
554 
555         dev_dbg(&port->port->dev, "%s - XByteCount    0x%X\n", __func__, oedb->XByteCount);
556 
557         /* and the LSR */
558         status = read_ram(port->port->serial->dev,
559                         port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
560 
561         if (status)
562                 goto exit_is_tx_active;
563         dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr);
564 
565         /* If either buffer has data or we are transmitting then return TRUE */
566         if ((oedb->XByteCount & 0x80) != 0)
567                 bytes_left += 64;
568 
569         if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
570                 bytes_left += 1;
571 
572         /* We return Not Active if we get any kind of error */
573 exit_is_tx_active:
574         dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left);
575 
576         kfree(lsr);
577         kfree(oedb);
578         return bytes_left;
579 }
580 
581 static int choose_config(struct usb_device *dev)
582 {
583         /*
584          * There may be multiple configurations on this device, in which case
585          * we would need to read and parse all of them to find out which one
586          * we want. However, we just support one config at this point,
587          * configuration # 1, which is Config Descriptor 0.
588          */
589 
590         dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n",
591                 __func__, dev->config->desc.bNumInterfaces);
592         dev_dbg(&dev->dev, "%s - MAX Power            = %d\n",
593                 __func__, dev->config->desc.bMaxPower * 2);
594 
595         if (dev->config->desc.bNumInterfaces != 1) {
596                 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__);
597                 return -ENODEV;
598         }
599 
600         return 0;
601 }
602 
603 static int read_rom(struct edgeport_serial *serial,
604                                 int start_address, int length, __u8 *buffer)
605 {
606         int status;
607 
608         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
609                 status = read_download_mem(serial->serial->dev,
610                                                start_address,
611                                                length,
612                                                serial->TI_I2C_Type,
613                                                buffer);
614         } else {
615                 status = read_boot_mem(serial, start_address, length,
616                                                                 buffer);
617         }
618         return status;
619 }
620 
621 static int write_rom(struct edgeport_serial *serial, int start_address,
622                                                 int length, __u8 *buffer)
623 {
624         if (serial->product_info.TiMode == TI_MODE_BOOT)
625                 return write_boot_mem(serial, start_address, length,
626                                                                 buffer);
627 
628         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
629                 return write_i2c_mem(serial, start_address, length,
630                                                 serial->TI_I2C_Type, buffer);
631         return -EINVAL;
632 }
633 
634 /* Read a descriptor header from I2C based on type */
635 static int get_descriptor_addr(struct edgeport_serial *serial,
636                                 int desc_type, struct ti_i2c_desc *rom_desc)
637 {
638         int start_address;
639         int status;
640 
641         /* Search for requested descriptor in I2C */
642         start_address = 2;
643         do {
644                 status = read_rom(serial,
645                                    start_address,
646                                    sizeof(struct ti_i2c_desc),
647                                    (__u8 *)rom_desc);
648                 if (status)
649                         return 0;
650 
651                 if (rom_desc->Type == desc_type)
652                         return start_address;
653 
654                 start_address = start_address + sizeof(struct ti_i2c_desc) +
655                                                 le16_to_cpu(rom_desc->Size);
656 
657         } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
658 
659         return 0;
660 }
661 
662 /* Validate descriptor checksum */
663 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
664 {
665         __u16 i;
666         __u8 cs = 0;
667 
668         for (i = 0; i < le16_to_cpu(rom_desc->Size); i++)
669                 cs = (__u8)(cs + buffer[i]);
670 
671         if (cs != rom_desc->CheckSum) {
672                 pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
673                 return -EINVAL;
674         }
675         return 0;
676 }
677 
678 /* Make sure that the I2C image is good */
679 static int check_i2c_image(struct edgeport_serial *serial)
680 {
681         struct device *dev = &serial->serial->dev->dev;
682         int status = 0;
683         struct ti_i2c_desc *rom_desc;
684         int start_address = 2;
685         __u8 *buffer;
686         __u16 ttype;
687 
688         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
689         if (!rom_desc)
690                 return -ENOMEM;
691 
692         buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
693         if (!buffer) {
694                 kfree(rom_desc);
695                 return -ENOMEM;
696         }
697 
698         /* Read the first byte (Signature0) must be 0x52 or 0x10 */
699         status = read_rom(serial, 0, 1, buffer);
700         if (status)
701                 goto out;
702 
703         if (*buffer != UMP5152 && *buffer != UMP3410) {
704                 dev_err(dev, "%s - invalid buffer signature\n", __func__);
705                 status = -ENODEV;
706                 goto out;
707         }
708 
709         do {
710                 /* Validate the I2C */
711                 status = read_rom(serial,
712                                 start_address,
713                                 sizeof(struct ti_i2c_desc),
714                                 (__u8 *)rom_desc);
715                 if (status)
716                         break;
717 
718                 if ((start_address + sizeof(struct ti_i2c_desc) +
719                         le16_to_cpu(rom_desc->Size)) > TI_MAX_I2C_SIZE) {
720                         status = -ENODEV;
721                         dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__);
722                         break;
723                 }
724 
725                 dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type);
726 
727                 /* Skip type 2 record */
728                 ttype = rom_desc->Type & 0x0f;
729                 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
730                         && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
731                         /* Read the descriptor data */
732                         status = read_rom(serial, start_address +
733                                                 sizeof(struct ti_i2c_desc),
734                                                 le16_to_cpu(rom_desc->Size),
735                                                 buffer);
736                         if (status)
737                                 break;
738 
739                         status = valid_csum(rom_desc, buffer);
740                         if (status)
741                                 break;
742                 }
743                 start_address = start_address + sizeof(struct ti_i2c_desc) +
744                                                 le16_to_cpu(rom_desc->Size);
745 
746         } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
747                                 (start_address < TI_MAX_I2C_SIZE));
748 
749         if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
750                                 (start_address > TI_MAX_I2C_SIZE))
751                 status = -ENODEV;
752 
753 out:
754         kfree(buffer);
755         kfree(rom_desc);
756         return status;
757 }
758 
759 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
760 {
761         int status;
762         int start_address;
763         struct ti_i2c_desc *rom_desc;
764         struct edge_ti_manuf_descriptor *desc;
765         struct device *dev = &serial->serial->dev->dev;
766 
767         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
768         if (!rom_desc)
769                 return -ENOMEM;
770 
771         start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
772                                                                 rom_desc);
773 
774         if (!start_address) {
775                 dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__);
776                 status = -ENODEV;
777                 goto exit;
778         }
779 
780         /* Read the descriptor data */
781         status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
782                                         le16_to_cpu(rom_desc->Size), buffer);
783         if (status)
784                 goto exit;
785 
786         status = valid_csum(rom_desc, buffer);
787 
788         desc = (struct edge_ti_manuf_descriptor *)buffer;
789         dev_dbg(dev, "%s - IonConfig      0x%x\n", __func__, desc->IonConfig);
790         dev_dbg(dev, "%s - Version          %d\n", __func__, desc->Version);
791         dev_dbg(dev, "%s - Cpu/Board      0x%x\n", __func__, desc->CpuRev_BoardRev);
792         dev_dbg(dev, "%s - NumPorts         %d\n", __func__, desc->NumPorts);
793         dev_dbg(dev, "%s - NumVirtualPorts  %d\n", __func__, desc->NumVirtualPorts);
794         dev_dbg(dev, "%s - TotalPorts       %d\n", __func__, desc->TotalPorts);
795 
796 exit:
797         kfree(rom_desc);
798         return status;
799 }
800 
801 /* Build firmware header used for firmware update */
802 static int build_i2c_fw_hdr(u8 *header, const struct firmware *fw)
803 {
804         __u8 *buffer;
805         int buffer_size;
806         int i;
807         __u8 cs = 0;
808         struct ti_i2c_desc *i2c_header;
809         struct ti_i2c_image_header *img_header;
810         struct ti_i2c_firmware_rec *firmware_rec;
811         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
812 
813         /*
814          * In order to update the I2C firmware we must change the type 2 record
815          * to type 0xF2.  This will force the UMP to come up in Boot Mode.
816          * Then while in boot mode, the driver will download the latest
817          * firmware (padded to 15.5k) into the UMP ram.  And finally when the
818          * device comes back up in download mode the driver will cause the new
819          * firmware to be copied from the UMP Ram to I2C and the firmware will
820          * update the record type from 0xf2 to 0x02.
821          */
822 
823         /*
824          * Allocate a 15.5k buffer + 2 bytes for version number (Firmware
825          * Record)
826          */
827         buffer_size = (((1024 * 16) - 512 ) +
828                         sizeof(struct ti_i2c_firmware_rec));
829 
830         buffer = kmalloc(buffer_size, GFP_KERNEL);
831         if (!buffer)
832                 return -ENOMEM;
833 
834         /* Set entire image of 0xffs */
835         memset(buffer, 0xff, buffer_size);
836 
837         /* Copy version number into firmware record */
838         firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
839 
840         firmware_rec->Ver_Major = fw_hdr->major_version;
841         firmware_rec->Ver_Minor = fw_hdr->minor_version;
842 
843         /* Pointer to fw_down memory image */
844         img_header = (struct ti_i2c_image_header *)&fw->data[4];
845 
846         memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
847                 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
848                 le16_to_cpu(img_header->Length));
849 
850         for (i=0; i < buffer_size; i++) {
851                 cs = (__u8)(cs + buffer[i]);
852         }
853 
854         kfree(buffer);
855 
856         /* Build new header */
857         i2c_header =  (struct ti_i2c_desc *)header;
858         firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
859 
860         i2c_header->Type        = I2C_DESC_TYPE_FIRMWARE_BLANK;
861         i2c_header->Size        = cpu_to_le16(buffer_size);
862         i2c_header->CheckSum    = cs;
863         firmware_rec->Ver_Major = fw_hdr->major_version;
864         firmware_rec->Ver_Minor = fw_hdr->minor_version;
865 
866         return 0;
867 }
868 
869 /* Try to figure out what type of I2c we have */
870 static int i2c_type_bootmode(struct edgeport_serial *serial)
871 {
872         struct device *dev = &serial->serial->dev->dev;
873         int status;
874         u8 *data;
875 
876         data = kmalloc(1, GFP_KERNEL);
877         if (!data)
878                 return -ENOMEM;
879 
880         /* Try to read type 2 */
881         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
882                                 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
883         if (status)
884                 dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status);
885         else
886                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
887         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
888                 dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__);
889                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
890                 goto out;
891         }
892 
893         /* Try to read type 3 */
894         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
895                                 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
896         if (status)
897                 dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status);
898         else
899                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
900         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
901                 dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__);
902                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
903                 goto out;
904         }
905 
906         dev_dbg(dev, "%s - Unknown\n", __func__);
907         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
908         status = -ENODEV;
909 out:
910         kfree(data);
911         return status;
912 }
913 
914 static int bulk_xfer(struct usb_serial *serial, void *buffer,
915                                                 int length, int *num_sent)
916 {
917         int status;
918 
919         status = usb_bulk_msg(serial->dev,
920                         usb_sndbulkpipe(serial->dev,
921                                 serial->port[0]->bulk_out_endpointAddress),
922                         buffer, length, num_sent, 1000);
923         return status;
924 }
925 
926 /* Download given firmware image to the device (IN BOOT MODE) */
927 static int download_code(struct edgeport_serial *serial, __u8 *image,
928                                                         int image_length)
929 {
930         int status = 0;
931         int pos;
932         int transfer;
933         int done;
934 
935         /* Transfer firmware image */
936         for (pos = 0; pos < image_length; ) {
937                 /* Read the next buffer from file */
938                 transfer = image_length - pos;
939                 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
940                         transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
941 
942                 /* Transfer data */
943                 status = bulk_xfer(serial->serial, &image[pos],
944                                                         transfer, &done);
945                 if (status)
946                         break;
947                 /* Advance buffer pointer */
948                 pos += done;
949         }
950 
951         return status;
952 }
953 
954 /* FIXME!!! */
955 static int config_boot_dev(struct usb_device *dev)
956 {
957         return 0;
958 }
959 
960 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
961 {
962         return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
963 }
964 
965 static int check_fw_sanity(struct edgeport_serial *serial,
966                 const struct firmware *fw)
967 {
968         u16 length_total;
969         u8 checksum = 0;
970         int pos;
971         struct device *dev = &serial->serial->interface->dev;
972         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
973 
974         if (fw->size < sizeof(struct edgeport_fw_hdr)) {
975                 dev_err(dev, "incomplete fw header\n");
976                 return -EINVAL;
977         }
978 
979         length_total = le16_to_cpu(fw_hdr->length) +
980                         sizeof(struct edgeport_fw_hdr);
981 
982         if (fw->size != length_total) {
983                 dev_err(dev, "bad fw size (expected: %u, got: %zu)\n",
984                                 length_total, fw->size);
985                 return -EINVAL;
986         }
987 
988         for (pos = sizeof(struct edgeport_fw_hdr); pos < fw->size; ++pos)
989                 checksum += fw->data[pos];
990 
991         if (checksum != fw_hdr->checksum) {
992                 dev_err(dev, "bad fw checksum (expected: 0x%x, got: 0x%x)\n",
993                                 fw_hdr->checksum, checksum);
994                 return -EINVAL;
995         }
996 
997         return 0;
998 }
999 
1000 /*
1001  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
1002  *
1003  * This routine downloads the main operating code into the TI5052, using the
1004  * boot code already burned into E2PROM or ROM.
1005  */
1006 static int download_fw(struct edgeport_serial *serial)
1007 {
1008         struct device *dev = &serial->serial->interface->dev;
1009         int status = 0;
1010         struct usb_interface_descriptor *interface;
1011         const struct firmware *fw;
1012         const char *fw_name = "edgeport/down3.bin";
1013         struct edgeport_fw_hdr *fw_hdr;
1014 
1015         status = request_firmware(&fw, fw_name, dev);
1016         if (status) {
1017                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
1018                                 fw_name, status);
1019                 return status;
1020         }
1021 
1022         if (check_fw_sanity(serial, fw)) {
1023                 status = -EINVAL;
1024                 goto out;
1025         }
1026 
1027         fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1028 
1029         /* If on-board version is newer, "fw_version" will be updated later. */
1030         serial->fw_version = (fw_hdr->major_version << 8) +
1031                         fw_hdr->minor_version;
1032 
1033         /*
1034          * This routine is entered by both the BOOT mode and the Download mode
1035          * We can determine which code is running by the reading the config
1036          * descriptor and if we have only one bulk pipe it is in boot mode
1037          */
1038         serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1039 
1040         /* Default to type 2 i2c */
1041         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1042 
1043         status = choose_config(serial->serial->dev);
1044         if (status)
1045                 goto out;
1046 
1047         interface = &serial->serial->interface->cur_altsetting->desc;
1048         if (!interface) {
1049                 dev_err(dev, "%s - no interface set, error!\n", __func__);
1050                 status = -ENODEV;
1051                 goto out;
1052         }
1053 
1054         /*
1055          * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1056          * if we have more than one endpoint we are definitely in download
1057          * mode
1058          */
1059         if (interface->bNumEndpoints > 1) {
1060                 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1061                 status = do_download_mode(serial, fw);
1062         } else {
1063                 /* Otherwise we will remain in configuring mode */
1064                 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1065                 status = do_boot_mode(serial, fw);
1066         }
1067 
1068 out:
1069         release_firmware(fw);
1070         return status;
1071 }
1072 
1073 static int do_download_mode(struct edgeport_serial *serial,
1074                 const struct firmware *fw)
1075 {
1076         struct device *dev = &serial->serial->interface->dev;
1077         int status = 0;
1078         int start_address;
1079         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1080         int download_cur_ver;
1081         int download_new_ver;
1082         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1083         struct ti_i2c_desc *rom_desc;
1084 
1085         dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__);
1086 
1087         status = check_i2c_image(serial);
1088         if (status) {
1089                 dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__);
1090                 return status;
1091         }
1092 
1093         /*
1094          * Validate Hardware version number
1095          * Read Manufacturing Descriptor from TI Based Edgeport
1096          */
1097         ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1098         if (!ti_manuf_desc)
1099                 return -ENOMEM;
1100 
1101         status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1102         if (status) {
1103                 kfree(ti_manuf_desc);
1104                 return status;
1105         }
1106 
1107         /* Check version number of ION descriptor */
1108         if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1109                 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1110                         __func__, ti_cpu_rev(ti_manuf_desc));
1111                 kfree(ti_manuf_desc);
1112                 return -EINVAL;
1113         }
1114 
1115         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1116         if (!rom_desc) {
1117                 kfree(ti_manuf_desc);
1118                 return -ENOMEM;
1119         }
1120 
1121         /* Search for type 2 record (firmware record) */
1122         start_address = get_descriptor_addr(serial,
1123                         I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1124         if (start_address != 0) {
1125                 struct ti_i2c_firmware_rec *firmware_version;
1126                 u8 *record;
1127 
1128                 dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n",
1129                                 __func__);
1130 
1131                 firmware_version = kmalloc(sizeof(*firmware_version),
1132                                                         GFP_KERNEL);
1133                 if (!firmware_version) {
1134                         kfree(rom_desc);
1135                         kfree(ti_manuf_desc);
1136                         return -ENOMEM;
1137                 }
1138 
1139                 /*
1140                  * Validate version number
1141                  * Read the descriptor data
1142                  */
1143                 status = read_rom(serial, start_address +
1144                                 sizeof(struct ti_i2c_desc),
1145                                 sizeof(struct ti_i2c_firmware_rec),
1146                                 (__u8 *)firmware_version);
1147                 if (status) {
1148                         kfree(firmware_version);
1149                         kfree(rom_desc);
1150                         kfree(ti_manuf_desc);
1151                         return status;
1152                 }
1153 
1154                 /*
1155                  * Check version number of download with current
1156                  * version in I2c
1157                  */
1158                 download_cur_ver = (firmware_version->Ver_Major << 8) +
1159                                    (firmware_version->Ver_Minor);
1160                 download_new_ver = (fw_hdr->major_version << 8) +
1161                                    (fw_hdr->minor_version);
1162 
1163                 dev_dbg(dev, "%s - >> FW Versions Device %d.%d  Driver %d.%d\n",
1164                         __func__, firmware_version->Ver_Major,
1165                         firmware_version->Ver_Minor,
1166                         fw_hdr->major_version, fw_hdr->minor_version);
1167 
1168                 /*
1169                  * Check if we have an old version in the I2C and
1170                  * update if necessary
1171                  */
1172                 if (download_cur_ver < download_new_ver) {
1173                         dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n",
1174                                 __func__,
1175                                 firmware_version->Ver_Major,
1176                                 firmware_version->Ver_Minor,
1177                                 fw_hdr->major_version,
1178                                 fw_hdr->minor_version);
1179 
1180                         record = kmalloc(1, GFP_KERNEL);
1181                         if (!record) {
1182                                 kfree(firmware_version);
1183                                 kfree(rom_desc);
1184                                 kfree(ti_manuf_desc);
1185                                 return -ENOMEM;
1186                         }
1187                         /*
1188                          * In order to update the I2C firmware we must
1189                          * change the type 2 record to type 0xF2. This
1190                          * will force the UMP to come up in Boot Mode.
1191                          * Then while in boot mode, the driver will
1192                          * download the latest firmware (padded to
1193                          * 15.5k) into the UMP ram. Finally when the
1194                          * device comes back up in download mode the
1195                          * driver will cause the new firmware to be
1196                          * copied from the UMP Ram to I2C and the
1197                          * firmware will update the record type from
1198                          * 0xf2 to 0x02.
1199                          */
1200                         *record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1201 
1202                         /*
1203                          * Change the I2C Firmware record type to
1204                          * 0xf2 to trigger an update
1205                          */
1206                         status = write_rom(serial, start_address,
1207                                         sizeof(*record), record);
1208                         if (status) {
1209                                 kfree(record);
1210                                 kfree(firmware_version);
1211                                 kfree(rom_desc);
1212                                 kfree(ti_manuf_desc);
1213                                 return status;
1214                         }
1215 
1216                         /*
1217                          * verify the write -- must do this in order
1218                          * for write to complete before we do the
1219                          * hardware reset
1220                          */
1221                         status = read_rom(serial,
1222                                                 start_address,
1223                                                 sizeof(*record),
1224                                                 record);
1225                         if (status) {
1226                                 kfree(record);
1227                                 kfree(firmware_version);
1228                                 kfree(rom_desc);
1229                                 kfree(ti_manuf_desc);
1230                                 return status;
1231                         }
1232 
1233                         if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1234                                 dev_err(dev, "%s - error resetting device\n",
1235                                                 __func__);
1236                                 kfree(record);
1237                                 kfree(firmware_version);
1238                                 kfree(rom_desc);
1239                                 kfree(ti_manuf_desc);
1240                                 return -ENODEV;
1241                         }
1242 
1243                         dev_dbg(dev, "%s - HARDWARE RESET\n", __func__);
1244 
1245                         /* Reset UMP -- Back to BOOT MODE */
1246                         status = ti_vsend_sync(serial->serial->dev,
1247                                         UMPC_HARDWARE_RESET,
1248                                         0, 0, NULL, 0,
1249                                         TI_VSEND_TIMEOUT_DEFAULT);
1250 
1251                         dev_dbg(dev, "%s - HARDWARE RESET return %d\n",
1252                                         __func__, status);
1253 
1254                         /* return an error on purpose. */
1255                         kfree(record);
1256                         kfree(firmware_version);
1257                         kfree(rom_desc);
1258                         kfree(ti_manuf_desc);
1259                         return -ENODEV;
1260                 }
1261                 /* Same or newer fw version is already loaded */
1262                 serial->fw_version = download_cur_ver;
1263                 kfree(firmware_version);
1264         }
1265         /* Search for type 0xF2 record (firmware blank record) */
1266         else {
1267                 start_address = get_descriptor_addr(serial,
1268                                 I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc);
1269                 if (start_address != 0) {
1270 #define HEADER_SIZE     (sizeof(struct ti_i2c_desc) + \
1271                                 sizeof(struct ti_i2c_firmware_rec))
1272                         __u8 *header;
1273                         __u8 *vheader;
1274 
1275                         header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1276                         if (!header) {
1277                                 kfree(rom_desc);
1278                                 kfree(ti_manuf_desc);
1279                                 return -ENOMEM;
1280                         }
1281 
1282                         vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1283                         if (!vheader) {
1284                                 kfree(header);
1285                                 kfree(rom_desc);
1286                                 kfree(ti_manuf_desc);
1287                                 return -ENOMEM;
1288                         }
1289 
1290                         dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n",
1291                                         __func__);
1292 
1293                         /*
1294                          * In order to update the I2C firmware we must change
1295                          * the type 2 record to type 0xF2. This will force the
1296                          * UMP to come up in Boot Mode.  Then while in boot
1297                          * mode, the driver will download the latest firmware
1298                          * (padded to 15.5k) into the UMP ram. Finally when the
1299                          * device comes back up in download mode the driver
1300                          * will cause the new firmware to be copied from the
1301                          * UMP Ram to I2C and the firmware will update the
1302                          * record type from 0xf2 to 0x02.
1303                          */
1304                         status = build_i2c_fw_hdr(header, fw);
1305                         if (status) {
1306                                 kfree(vheader);
1307                                 kfree(header);
1308                                 kfree(rom_desc);
1309                                 kfree(ti_manuf_desc);
1310                                 return -EINVAL;
1311                         }
1312 
1313                         /*
1314                          * Update I2C with type 0xf2 record with correct
1315                          * size and checksum
1316                          */
1317                         status = write_rom(serial,
1318                                                 start_address,
1319                                                 HEADER_SIZE,
1320                                                 header);
1321                         if (status) {
1322                                 kfree(vheader);
1323                                 kfree(header);
1324                                 kfree(rom_desc);
1325                                 kfree(ti_manuf_desc);
1326                                 return -EINVAL;
1327                         }
1328 
1329                         /*
1330                          * verify the write -- must do this in order for
1331                          * write to complete before we do the hardware reset
1332                          */
1333                         status = read_rom(serial, start_address,
1334                                                         HEADER_SIZE, vheader);
1335 
1336                         if (status) {
1337                                 dev_dbg(dev, "%s - can't read header back\n",
1338                                                 __func__);
1339                                 kfree(vheader);
1340                                 kfree(header);
1341                                 kfree(rom_desc);
1342                                 kfree(ti_manuf_desc);
1343                                 return status;
1344                         }
1345                         if (memcmp(vheader, header, HEADER_SIZE)) {
1346                                 dev_dbg(dev, "%s - write download record failed\n",
1347                                                 __func__);
1348                                 kfree(vheader);
1349                                 kfree(header);
1350                                 kfree(rom_desc);
1351                                 kfree(ti_manuf_desc);
1352                                 return -EINVAL;
1353                         }
1354 
1355                         kfree(vheader);
1356                         kfree(header);
1357 
1358                         dev_dbg(dev, "%s - Start firmware update\n", __func__);
1359 
1360                         /* Tell firmware to copy download image into I2C */
1361                         status = ti_vsend_sync(serial->serial->dev,
1362                                         UMPC_COPY_DNLD_TO_I2C,
1363                                         0, 0, NULL, 0,
1364                                         TI_VSEND_TIMEOUT_FW_DOWNLOAD);
1365 
1366                         dev_dbg(dev, "%s - Update complete 0x%x\n", __func__,
1367                                         status);
1368                         if (status) {
1369                                 dev_err(dev,
1370                                         "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1371                                         __func__);
1372                                 kfree(rom_desc);
1373                                 kfree(ti_manuf_desc);
1374                                 return status;
1375                         }
1376                 }
1377         }
1378 
1379         /* The device is running the download code */
1380         kfree(rom_desc);
1381         kfree(ti_manuf_desc);
1382         return 0;
1383 }
1384 
1385 static int do_boot_mode(struct edgeport_serial *serial,
1386                 const struct firmware *fw)
1387 {
1388         struct device *dev = &serial->serial->interface->dev;
1389         int status = 0;
1390         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1391         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1392 
1393         dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__);
1394 
1395         /* Configure the TI device so we can use the BULK pipes for download */
1396         status = config_boot_dev(serial->serial->dev);
1397         if (status)
1398                 return status;
1399 
1400         if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1401                                                         != USB_VENDOR_ID_ION) {
1402                 dev_dbg(dev, "%s - VID = 0x%x\n", __func__,
1403                         le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1404                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1405                 goto stayinbootmode;
1406         }
1407 
1408         /*
1409          * We have an ION device (I2c Must be programmed)
1410          * Determine I2C image type
1411          */
1412         if (i2c_type_bootmode(serial))
1413                 goto stayinbootmode;
1414 
1415         /* Check for ION Vendor ID and that the I2C is valid */
1416         if (!check_i2c_image(serial)) {
1417                 struct ti_i2c_image_header *header;
1418                 int i;
1419                 __u8 cs = 0;
1420                 __u8 *buffer;
1421                 int buffer_size;
1422 
1423                 /*
1424                  * Validate Hardware version number
1425                  * Read Manufacturing Descriptor from TI Based Edgeport
1426                  */
1427                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1428                 if (!ti_manuf_desc)
1429                         return -ENOMEM;
1430 
1431                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1432                 if (status) {
1433                         kfree(ti_manuf_desc);
1434                         goto stayinbootmode;
1435                 }
1436 
1437                 /* Check for version 2 */
1438                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1439                         dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1440                                 __func__, ti_cpu_rev(ti_manuf_desc));
1441                         kfree(ti_manuf_desc);
1442                         goto stayinbootmode;
1443                 }
1444 
1445                 kfree(ti_manuf_desc);
1446 
1447                 /*
1448                  * In order to update the I2C firmware we must change the type
1449                  * 2 record to type 0xF2. This will force the UMP to come up
1450                  * in Boot Mode.  Then while in boot mode, the driver will
1451                  * download the latest firmware (padded to 15.5k) into the
1452                  * UMP ram. Finally when the device comes back up in download
1453                  * mode the driver will cause the new firmware to be copied
1454                  * from the UMP Ram to I2C and the firmware will update the
1455                  * record type from 0xf2 to 0x02.
1456                  *
1457                  * Do we really have to copy the whole firmware image,
1458                  * or could we do this in place!
1459                  */
1460 
1461                 /* Allocate a 15.5k buffer + 3 byte header */
1462                 buffer_size = (((1024 * 16) - 512) +
1463                                         sizeof(struct ti_i2c_image_header));
1464                 buffer = kmalloc(buffer_size, GFP_KERNEL);
1465                 if (!buffer)
1466                         return -ENOMEM;
1467 
1468                 /* Initialize the buffer to 0xff (pad the buffer) */
1469                 memset(buffer, 0xff, buffer_size);
1470                 memcpy(buffer, &fw->data[4], fw->size - 4);
1471 
1472                 for (i = sizeof(struct ti_i2c_image_header);
1473                                 i < buffer_size; i++) {
1474                         cs = (__u8)(cs + buffer[i]);
1475                 }
1476 
1477                 header = (struct ti_i2c_image_header *)buffer;
1478 
1479                 /* update length and checksum after padding */
1480                 header->Length   = cpu_to_le16((__u16)(buffer_size -
1481                                         sizeof(struct ti_i2c_image_header)));
1482                 header->CheckSum = cs;
1483 
1484                 /* Download the operational code  */
1485                 dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n",
1486                                 __func__,
1487                                 fw_hdr->major_version, fw_hdr->minor_version);
1488                 status = download_code(serial, buffer, buffer_size);
1489 
1490                 kfree(buffer);
1491 
1492                 if (status) {
1493                         dev_dbg(dev, "%s - Error downloading operational code image\n", __func__);
1494                         return status;
1495                 }
1496 
1497                 /* Device will reboot */
1498                 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1499 
1500                 dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__);
1501 
1502                 /* return an error on purpose */
1503                 return -ENODEV;
1504         }
1505 
1506 stayinbootmode:
1507         /* Eprom is invalid or blank stay in boot mode */
1508         dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__);
1509         serial->product_info.TiMode = TI_MODE_BOOT;
1510 
1511         return 0;
1512 }
1513 
1514 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1515 {
1516         int port_number = port->port->port_number;
1517 
1518         on = !!on;      /* 1 or 0 not bitmask */
1519         return send_cmd(port->port->serial->dev,
1520                         feature, (__u8)(UMPM_UART1_PORT + port_number),
1521                         on, NULL, 0);
1522 }
1523 
1524 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1525 {
1526         int status = 0;
1527 
1528         dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr);
1529 
1530         status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1531         if (status)
1532                 return status;
1533         status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1534         if (status)
1535                 return status;
1536         return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1537 }
1538 
1539 /* Convert TI LSR to standard UART flags */
1540 static __u8 map_line_status(__u8 ti_lsr)
1541 {
1542         __u8 lsr = 0;
1543 
1544 #define MAP_FLAG(flagUmp, flagUart)    \
1545         if (ti_lsr & flagUmp) \
1546                 lsr |= flagUart;
1547 
1548         MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)    /* overrun */
1549         MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)     /* parity error */
1550         MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)     /* framing error */
1551         MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)       /* break detected */
1552         MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)    /* rx data available */
1553         MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)    /* tx hold reg empty */
1554 
1555 #undef MAP_FLAG
1556 
1557         return lsr;
1558 }
1559 
1560 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1561 {
1562         struct async_icount *icount;
1563         struct tty_struct *tty;
1564 
1565         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr);
1566 
1567         if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1568                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1569                 icount = &edge_port->port->icount;
1570 
1571                 /* update input line counters */
1572                 if (msr & EDGEPORT_MSR_DELTA_CTS)
1573                         icount->cts++;
1574                 if (msr & EDGEPORT_MSR_DELTA_DSR)
1575                         icount->dsr++;
1576                 if (msr & EDGEPORT_MSR_DELTA_CD)
1577                         icount->dcd++;
1578                 if (msr & EDGEPORT_MSR_DELTA_RI)
1579                         icount->rng++;
1580                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1581         }
1582 
1583         /* Save the new modem status */
1584         edge_port->shadow_msr = msr & 0xf0;
1585 
1586         tty = tty_port_tty_get(&edge_port->port->port);
1587         /* handle CTS flow control */
1588         if (tty && C_CRTSCTS(tty)) {
1589                 if (msr & EDGEPORT_MSR_CTS)
1590                         tty_wakeup(tty);
1591         }
1592         tty_kref_put(tty);
1593 }
1594 
1595 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1596                                                         __u8 lsr, __u8 data)
1597 {
1598         struct async_icount *icount;
1599         __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1600                                                 LSR_FRM_ERR | LSR_BREAK));
1601 
1602         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr);
1603 
1604         edge_port->shadow_lsr = lsr;
1605 
1606         if (new_lsr & LSR_BREAK)
1607                 /*
1608                  * Parity and Framing errors only count if they
1609                  * occur exclusive of a break being received.
1610                  */
1611                 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1612 
1613         /* Place LSR data byte into Rx buffer */
1614         if (lsr_data)
1615                 edge_tty_recv(edge_port->port, &data, 1);
1616 
1617         /* update input line counters */
1618         icount = &edge_port->port->icount;
1619         if (new_lsr & LSR_BREAK)
1620                 icount->brk++;
1621         if (new_lsr & LSR_OVER_ERR)
1622                 icount->overrun++;
1623         if (new_lsr & LSR_PAR_ERR)
1624                 icount->parity++;
1625         if (new_lsr & LSR_FRM_ERR)
1626                 icount->frame++;
1627 }
1628 
1629 static void edge_interrupt_callback(struct urb *urb)
1630 {
1631         struct edgeport_serial *edge_serial = urb->context;
1632         struct usb_serial_port *port;
1633         struct edgeport_port *edge_port;
1634         struct device *dev;
1635         unsigned char *data = urb->transfer_buffer;
1636         int length = urb->actual_length;
1637         int port_number;
1638         int function;
1639         int retval;
1640         __u8 lsr;
1641         __u8 msr;
1642         int status = urb->status;
1643 
1644         switch (status) {
1645         case 0:
1646                 /* success */
1647                 break;
1648         case -ECONNRESET:
1649         case -ENOENT:
1650         case -ESHUTDOWN:
1651                 /* this urb is terminated, clean up */
1652                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1653                     __func__, status);
1654                 return;
1655         default:
1656                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1657                         "%d\n", __func__, status);
1658                 goto exit;
1659         }
1660 
1661         if (!length) {
1662                 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__);
1663                 goto exit;
1664         }
1665 
1666         dev = &edge_serial->serial->dev->dev;
1667         usb_serial_debug_data(dev, __func__, length, data);
1668 
1669         if (length != 2) {
1670                 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length);
1671                 goto exit;
1672         }
1673 
1674         port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1675         function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1676         dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
1677                 port_number, function, data[1]);
1678         port = edge_serial->serial->port[port_number];
1679         edge_port = usb_get_serial_port_data(port);
1680         if (!edge_port) {
1681                 dev_dbg(dev, "%s - edge_port not found\n", __func__);
1682                 return;
1683         }
1684         switch (function) {
1685         case TIUMP_INTERRUPT_CODE_LSR:
1686                 lsr = map_line_status(data[1]);
1687                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1688                         /*
1689                          * Save the LSR event for bulk read completion routine
1690                          */
1691                         dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n",
1692                                 __func__, port_number, lsr);
1693                         edge_port->lsr_event = 1;
1694                         edge_port->lsr_mask = lsr;
1695                 } else {
1696                         dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n",
1697                                 __func__, port_number, lsr);
1698                         handle_new_lsr(edge_port, 0, lsr, 0);
1699                 }
1700                 break;
1701 
1702         case TIUMP_INTERRUPT_CODE_MSR:  /* MSR */
1703                 /* Copy MSR from UMP */
1704                 msr = data[1];
1705                 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n",
1706                         __func__, port_number, msr);
1707                 handle_new_msr(edge_port, msr);
1708                 break;
1709 
1710         default:
1711                 dev_err(&urb->dev->dev,
1712                         "%s - Unknown Interrupt code from UMP %x\n",
1713                         __func__, data[1]);
1714                 break;
1715 
1716         }
1717 
1718 exit:
1719         retval = usb_submit_urb(urb, GFP_ATOMIC);
1720         if (retval)
1721                 dev_err(&urb->dev->dev,
1722                         "%s - usb_submit_urb failed with result %d\n",
1723                          __func__, retval);
1724 }
1725 
1726 static void edge_bulk_in_callback(struct urb *urb)
1727 {
1728         struct edgeport_port *edge_port = urb->context;
1729         struct device *dev = &edge_port->port->dev;
1730         unsigned char *data = urb->transfer_buffer;
1731         int retval = 0;
1732         int port_number;
1733         int status = urb->status;
1734 
1735         switch (status) {
1736         case 0:
1737                 /* success */
1738                 break;
1739         case -ECONNRESET:
1740         case -ENOENT:
1741         case -ESHUTDOWN:
1742                 /* this urb is terminated, clean up */
1743                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
1744                 return;
1745         default:
1746                 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status);
1747         }
1748 
1749         if (status == -EPIPE)
1750                 goto exit;
1751 
1752         if (status) {
1753                 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1754                 return;
1755         }
1756 
1757         port_number = edge_port->port->port_number;
1758 
1759         if (edge_port->lsr_event) {
1760                 edge_port->lsr_event = 0;
1761                 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n",
1762                         __func__, port_number, edge_port->lsr_mask, *data);
1763                 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1764                 /* Adjust buffer length/pointer */
1765                 --urb->actual_length;
1766                 ++data;
1767         }
1768 
1769         if (urb->actual_length) {
1770                 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
1771                 if (edge_port->close_pending)
1772                         dev_dbg(dev, "%s - close pending, dropping data on the floor\n",
1773                                                                 __func__);
1774                 else
1775                         edge_tty_recv(edge_port->port, data,
1776                                         urb->actual_length);
1777                 edge_port->port->icount.rx += urb->actual_length;
1778         }
1779 
1780 exit:
1781         /* continue read unless stopped */
1782         spin_lock(&edge_port->ep_lock);
1783         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1784                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1785         else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1786                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1787 
1788         spin_unlock(&edge_port->ep_lock);
1789         if (retval)
1790                 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);
1791 }
1792 
1793 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1794                 int length)
1795 {
1796         int queued;
1797 
1798         queued = tty_insert_flip_string(&port->port, data, length);
1799         if (queued < length)
1800                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1801                         __func__, length - queued);
1802         tty_flip_buffer_push(&port->port);
1803 }
1804 
1805 static void edge_bulk_out_callback(struct urb *urb)
1806 {
1807         struct usb_serial_port *port = urb->context;
1808         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1809         int status = urb->status;
1810         struct tty_struct *tty;
1811 
1812         edge_port->ep_write_urb_in_use = 0;
1813 
1814         switch (status) {
1815         case 0:
1816                 /* success */
1817                 break;
1818         case -ECONNRESET:
1819         case -ENOENT:
1820         case -ESHUTDOWN:
1821                 /* this urb is terminated, clean up */
1822                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1823                     __func__, status);
1824                 return;
1825         default:
1826                 dev_err_console(port, "%s - nonzero write bulk status "
1827                         "received: %d\n", __func__, status);
1828         }
1829 
1830         /* send any buffered data */
1831         tty = tty_port_tty_get(&port->port);
1832         edge_send(port, tty);
1833         tty_kref_put(tty);
1834 }
1835 
1836 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1837 {
1838         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1839         struct edgeport_serial *edge_serial;
1840         struct usb_device *dev;
1841         struct urb *urb;
1842         int port_number;
1843         int status;
1844         u16 open_settings;
1845         u8 transaction_timeout;
1846 
1847         if (edge_port == NULL)
1848                 return -ENODEV;
1849 
1850         port_number = port->port_number;
1851 
1852         dev = port->serial->dev;
1853 
1854         /* turn off loopback */
1855         status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1856         if (status) {
1857                 dev_err(&port->dev,
1858                                 "%s - cannot send clear loopback command, %d\n",
1859                         __func__, status);
1860                 return status;
1861         }
1862 
1863         /* set up the port settings */
1864         if (tty)
1865                 edge_set_termios(tty, port, &tty->termios);
1866 
1867         /* open up the port */
1868 
1869         /* milliseconds to timeout for DMA transfer */
1870         transaction_timeout = 2;
1871 
1872         edge_port->ump_read_timeout =
1873                                 max(20, ((transaction_timeout * 3) / 2));
1874 
1875         /* milliseconds to timeout for DMA transfer */
1876         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1877                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1878                              (transaction_timeout << 2));
1879 
1880         dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__);
1881 
1882         /* Tell TI to open and start the port */
1883         status = send_cmd(dev, UMPC_OPEN_PORT,
1884                 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1885         if (status) {
1886                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1887                                                         __func__, status);
1888                 return status;
1889         }
1890 
1891         /* Start the DMA? */
1892         status = send_cmd(dev, UMPC_START_PORT,
1893                 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1894         if (status) {
1895                 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1896                                                         __func__, status);
1897                 return status;
1898         }
1899 
1900         /* Clear TX and RX buffers in UMP */
1901         status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1902         if (status) {
1903                 dev_err(&port->dev,
1904                         "%s - cannot send clear buffers command, %d\n",
1905                         __func__, status);
1906                 return status;
1907         }
1908 
1909         /* Read Initial MSR */
1910         status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1911                                 (__u16)(UMPM_UART1_PORT + port_number),
1912                                 &edge_port->shadow_msr, 1);
1913         if (status) {
1914                 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1915                                                         __func__, status);
1916                 return status;
1917         }
1918 
1919         dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr);
1920 
1921         /* Set Initial MCR */
1922         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1923         dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr);
1924 
1925         edge_serial = edge_port->edge_serial;
1926         if (mutex_lock_interruptible(&edge_serial->es_lock))
1927                 return -ERESTARTSYS;
1928         if (edge_serial->num_ports_open == 0) {
1929                 /* we are the first port to open, post the interrupt urb */
1930                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1931                 if (!urb) {
1932                         dev_err(&port->dev,
1933                                 "%s - no interrupt urb present, exiting\n",
1934                                 __func__);
1935                         status = -EINVAL;
1936                         goto release_es_lock;
1937                 }
1938                 urb->context = edge_serial;
1939                 status = usb_submit_urb(urb, GFP_KERNEL);
1940                 if (status) {
1941                         dev_err(&port->dev,
1942                                 "%s - usb_submit_urb failed with value %d\n",
1943                                         __func__, status);
1944                         goto release_es_lock;
1945                 }
1946         }
1947 
1948         /*
1949          * reset the data toggle on the bulk endpoints to work around bug in
1950          * host controllers where things get out of sync some times
1951          */
1952         usb_clear_halt(dev, port->write_urb->pipe);
1953         usb_clear_halt(dev, port->read_urb->pipe);
1954 
1955         /* start up our bulk read urb */
1956         urb = port->read_urb;
1957         if (!urb) {
1958                 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1959                                                                 __func__);
1960                 status = -EINVAL;
1961                 goto unlink_int_urb;
1962         }
1963         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1964         urb->context = edge_port;
1965         status = usb_submit_urb(urb, GFP_KERNEL);
1966         if (status) {
1967                 dev_err(&port->dev,
1968                         "%s - read bulk usb_submit_urb failed with value %d\n",
1969                                 __func__, status);
1970                 goto unlink_int_urb;
1971         }
1972 
1973         ++edge_serial->num_ports_open;
1974 
1975         goto release_es_lock;
1976 
1977 unlink_int_urb:
1978         if (edge_port->edge_serial->num_ports_open == 0)
1979                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1980 release_es_lock:
1981         mutex_unlock(&edge_serial->es_lock);
1982         return status;
1983 }
1984 
1985 static void edge_close(struct usb_serial_port *port)
1986 {
1987         struct edgeport_serial *edge_serial;
1988         struct edgeport_port *edge_port;
1989         struct usb_serial *serial = port->serial;
1990         unsigned long flags;
1991         int port_number;
1992 
1993         edge_serial = usb_get_serial_data(port->serial);
1994         edge_port = usb_get_serial_port_data(port);
1995         if (edge_serial == NULL || edge_port == NULL)
1996                 return;
1997 
1998         /*
1999          * The bulkreadcompletion routine will check
2000          * this flag and dump add read data
2001          */
2002         edge_port->close_pending = 1;
2003 
2004         usb_kill_urb(port->read_urb);
2005         usb_kill_urb(port->write_urb);
2006         edge_port->ep_write_urb_in_use = 0;
2007         spin_lock_irqsave(&edge_port->ep_lock, flags);
2008         kfifo_reset_out(&port->write_fifo);
2009         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2010 
2011         dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
2012         port_number = port->port_number;
2013         send_cmd(serial->dev, UMPC_CLOSE_PORT,
2014                      (__u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
2015 
2016         mutex_lock(&edge_serial->es_lock);
2017         --edge_port->edge_serial->num_ports_open;
2018         if (edge_port->edge_serial->num_ports_open <= 0) {
2019                 /* last port is now closed, let's shut down our interrupt urb */
2020                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2021                 edge_port->edge_serial->num_ports_open = 0;
2022         }
2023         mutex_unlock(&edge_serial->es_lock);
2024         edge_port->close_pending = 0;
2025 }
2026 
2027 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
2028                                 const unsigned char *data, int count)
2029 {
2030         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2031 
2032         if (count == 0) {
2033                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
2034                 return 0;
2035         }
2036 
2037         if (edge_port == NULL)
2038                 return -ENODEV;
2039         if (edge_port->close_pending == 1)
2040                 return -ENODEV;
2041 
2042         count = kfifo_in_locked(&port->write_fifo, data, count,
2043                                                         &edge_port->ep_lock);
2044         edge_send(port, tty);
2045 
2046         return count;
2047 }
2048 
2049 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty)
2050 {
2051         int count, result;
2052         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2053         unsigned long flags;
2054 
2055         spin_lock_irqsave(&edge_port->ep_lock, flags);
2056 
2057         if (edge_port->ep_write_urb_in_use) {
2058                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2059                 return;
2060         }
2061 
2062         count = kfifo_out(&port->write_fifo,
2063                                 port->write_urb->transfer_buffer,
2064                                 port->bulk_out_size);
2065 
2066         if (count == 0) {
2067                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2068                 return;
2069         }
2070 
2071         edge_port->ep_write_urb_in_use = 1;
2072 
2073         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2074 
2075         usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer);
2076 
2077         /* set up our urb */
2078         port->write_urb->transfer_buffer_length = count;
2079 
2080         /* send the data out the bulk port */
2081         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2082         if (result) {
2083                 dev_err_console(port,
2084                         "%s - failed submitting write urb, error %d\n",
2085                                 __func__, result);
2086                 edge_port->ep_write_urb_in_use = 0;
2087                 /* TODO: reschedule edge_send */
2088         } else
2089                 edge_port->port->icount.tx += count;
2090 
2091         /*
2092          * wakeup any process waiting for writes to complete
2093          * there is now more room in the buffer for new writes
2094          */
2095         if (tty)
2096                 tty_wakeup(tty);
2097 }
2098 
2099 static int edge_write_room(struct tty_struct *tty)
2100 {
2101         struct usb_serial_port *port = tty->driver_data;
2102         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2103         int room = 0;
2104         unsigned long flags;
2105 
2106         if (edge_port == NULL)
2107                 return 0;
2108         if (edge_port->close_pending == 1)
2109                 return 0;
2110 
2111         spin_lock_irqsave(&edge_port->ep_lock, flags);
2112         room = kfifo_avail(&port->write_fifo);
2113         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2114 
2115         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
2116         return room;
2117 }
2118 
2119 static int edge_chars_in_buffer(struct tty_struct *tty)
2120 {
2121         struct usb_serial_port *port = tty->driver_data;
2122         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2123         int chars = 0;
2124         unsigned long flags;
2125         if (edge_port == NULL)
2126                 return 0;
2127 
2128         spin_lock_irqsave(&edge_port->ep_lock, flags);
2129         chars = kfifo_len(&port->write_fifo);
2130         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2131 
2132         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
2133         return chars;
2134 }
2135 
2136 static bool edge_tx_empty(struct usb_serial_port *port)
2137 {
2138         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2139         int ret;
2140 
2141         ret = tx_active(edge_port);
2142         if (ret > 0)
2143                 return false;
2144 
2145         return true;
2146 }
2147 
2148 static void edge_throttle(struct tty_struct *tty)
2149 {
2150         struct usb_serial_port *port = tty->driver_data;
2151         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2152         int status;
2153 
2154         if (edge_port == NULL)
2155                 return;
2156 
2157         /* if we are implementing XON/XOFF, send the stop character */
2158         if (I_IXOFF(tty)) {
2159                 unsigned char stop_char = STOP_CHAR(tty);
2160                 status = edge_write(tty, port, &stop_char, 1);
2161                 if (status <= 0) {
2162                         dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2163                 }
2164         }
2165 
2166         /*
2167          * if we are implementing RTS/CTS, stop reads
2168          * and the Edgeport will clear the RTS line
2169          */
2170         if (C_CRTSCTS(tty))
2171                 stop_read(edge_port);
2172 
2173 }
2174 
2175 static void edge_unthrottle(struct tty_struct *tty)
2176 {
2177         struct usb_serial_port *port = tty->driver_data;
2178         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2179         int status;
2180 
2181         if (edge_port == NULL)
2182                 return;
2183 
2184         /* if we are implementing XON/XOFF, send the start character */
2185         if (I_IXOFF(tty)) {
2186                 unsigned char start_char = START_CHAR(tty);
2187                 status = edge_write(tty, port, &start_char, 1);
2188                 if (status <= 0) {
2189                         dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2190                 }
2191         }
2192         /*
2193          * if we are implementing RTS/CTS, restart reads
2194          * are the Edgeport will assert the RTS line
2195          */
2196         if (C_CRTSCTS(tty)) {
2197                 status = restart_read(edge_port);
2198                 if (status)
2199                         dev_err(&port->dev,
2200                                 "%s - read bulk usb_submit_urb failed: %d\n",
2201                                                         __func__, status);
2202         }
2203 
2204 }
2205 
2206 static void stop_read(struct edgeport_port *edge_port)
2207 {
2208         unsigned long flags;
2209 
2210         spin_lock_irqsave(&edge_port->ep_lock, flags);
2211 
2212         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2213                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2214         edge_port->shadow_mcr &= ~MCR_RTS;
2215 
2216         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2217 }
2218 
2219 static int restart_read(struct edgeport_port *edge_port)
2220 {
2221         struct urb *urb;
2222         int status = 0;
2223         unsigned long flags;
2224 
2225         spin_lock_irqsave(&edge_port->ep_lock, flags);
2226 
2227         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2228                 urb = edge_port->port->read_urb;
2229                 status = usb_submit_urb(urb, GFP_ATOMIC);
2230         }
2231         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2232         edge_port->shadow_mcr |= MCR_RTS;
2233 
2234         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2235 
2236         return status;
2237 }
2238 
2239 static void change_port_settings(struct tty_struct *tty,
2240                 struct edgeport_port *edge_port, struct ktermios *old_termios)
2241 {
2242         struct device *dev = &edge_port->port->dev;
2243         struct ump_uart_config *config;
2244         int baud;
2245         unsigned cflag;
2246         int status;
2247         int port_number = edge_port->port->port_number;
2248 
2249         config = kmalloc (sizeof (*config), GFP_KERNEL);
2250         if (!config) {
2251                 tty->termios = *old_termios;
2252                 return;
2253         }
2254 
2255         cflag = tty->termios.c_cflag;
2256 
2257         config->wFlags = 0;
2258 
2259         /* These flags must be set */
2260         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2261         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2262         config->bUartMode = (__u8)(edge_port->bUartMode);
2263 
2264         switch (cflag & CSIZE) {
2265         case CS5:
2266                     config->bDataBits = UMP_UART_CHAR5BITS;
2267                     dev_dbg(dev, "%s - data bits = 5\n", __func__);
2268                     break;
2269         case CS6:
2270                     config->bDataBits = UMP_UART_CHAR6BITS;
2271                     dev_dbg(dev, "%s - data bits = 6\n", __func__);
2272                     break;
2273         case CS7:
2274                     config->bDataBits = UMP_UART_CHAR7BITS;
2275                     dev_dbg(dev, "%s - data bits = 7\n", __func__);
2276                     break;
2277         default:
2278         case CS8:
2279                     config->bDataBits = UMP_UART_CHAR8BITS;
2280                     dev_dbg(dev, "%s - data bits = 8\n", __func__);
2281                             break;
2282         }
2283 
2284         if (cflag & PARENB) {
2285                 if (cflag & PARODD) {
2286                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2287                         config->bParity = UMP_UART_ODDPARITY;
2288                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2289                 } else {
2290                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2291                         config->bParity = UMP_UART_EVENPARITY;
2292                         dev_dbg(dev, "%s - parity = even\n", __func__);
2293                 }
2294         } else {
2295                 config->bParity = UMP_UART_NOPARITY;
2296                 dev_dbg(dev, "%s - parity = none\n", __func__);
2297         }
2298 
2299         if (cflag & CSTOPB) {
2300                 config->bStopBits = UMP_UART_STOPBIT2;
2301                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2302         } else {
2303                 config->bStopBits = UMP_UART_STOPBIT1;
2304                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2305         }
2306 
2307         /* figure out the flow control settings */
2308         if (cflag & CRTSCTS) {
2309                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2310                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2311                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2312         } else {
2313                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2314                 restart_read(edge_port);
2315         }
2316 
2317         /*
2318          * if we are implementing XON/XOFF, set the start and stop
2319          * character in the device
2320          */
2321         config->cXon  = START_CHAR(tty);
2322         config->cXoff = STOP_CHAR(tty);
2323 
2324         /* if we are implementing INBOUND XON/XOFF */
2325         if (I_IXOFF(tty)) {
2326                 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2327                 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2328                         __func__, config->cXon, config->cXoff);
2329         } else
2330                 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2331 
2332         /* if we are implementing OUTBOUND XON/XOFF */
2333         if (I_IXON(tty)) {
2334                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2335                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2336                         __func__, config->cXon, config->cXoff);
2337         } else
2338                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2339 
2340         tty->termios.c_cflag &= ~CMSPAR;
2341 
2342         /* Round the baud rate */
2343         baud = tty_get_baud_rate(tty);
2344         if (!baud) {
2345                 /* pick a default, any default... */
2346                 baud = 9600;
2347         } else
2348                 tty_encode_baud_rate(tty, baud, baud);
2349 
2350         edge_port->baud_rate = baud;
2351         config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2352 
2353         /* FIXME: Recompute actual baud from divisor here */
2354 
2355         dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate);
2356 
2357         dev_dbg(dev, "wBaudRate:   %d\n", (int)(461550L / config->wBaudRate));
2358         dev_dbg(dev, "wFlags:    0x%x\n", config->wFlags);
2359         dev_dbg(dev, "bDataBits:   %d\n", config->bDataBits);
2360         dev_dbg(dev, "bParity:     %d\n", config->bParity);
2361         dev_dbg(dev, "bStopBits:   %d\n", config->bStopBits);
2362         dev_dbg(dev, "cXon:        %d\n", config->cXon);
2363         dev_dbg(dev, "cXoff:       %d\n", config->cXoff);
2364         dev_dbg(dev, "bUartMode:   %d\n", config->bUartMode);
2365 
2366         /* move the word values into big endian mode */
2367         cpu_to_be16s(&config->wFlags);
2368         cpu_to_be16s(&config->wBaudRate);
2369 
2370         status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2371                                 (__u8)(UMPM_UART1_PORT + port_number),
2372                                 0, (__u8 *)config, sizeof(*config));
2373         if (status)
2374                 dev_dbg(dev, "%s - error %d when trying to write config to device\n",
2375                         __func__, status);
2376         kfree(config);
2377 }
2378 
2379 static void edge_set_termios(struct tty_struct *tty,
2380                 struct usb_serial_port *port, struct ktermios *old_termios)
2381 {
2382         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2383         unsigned int cflag;
2384 
2385         cflag = tty->termios.c_cflag;
2386 
2387         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2388                 tty->termios.c_cflag, tty->termios.c_iflag);
2389         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2390                 old_termios->c_cflag, old_termios->c_iflag);
2391 
2392         if (edge_port == NULL)
2393                 return;
2394         /* change the port settings to the new ones specified */
2395         change_port_settings(tty, edge_port, old_termios);
2396 }
2397 
2398 static int edge_tiocmset(struct tty_struct *tty,
2399                                         unsigned int set, unsigned int clear)
2400 {
2401         struct usb_serial_port *port = tty->driver_data;
2402         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2403         unsigned int mcr;
2404         unsigned long flags;
2405 
2406         spin_lock_irqsave(&edge_port->ep_lock, flags);
2407         mcr = edge_port->shadow_mcr;
2408         if (set & TIOCM_RTS)
2409                 mcr |= MCR_RTS;
2410         if (set & TIOCM_DTR)
2411                 mcr |= MCR_DTR;
2412         if (set & TIOCM_LOOP)
2413                 mcr |= MCR_LOOPBACK;
2414 
2415         if (clear & TIOCM_RTS)
2416                 mcr &= ~MCR_RTS;
2417         if (clear & TIOCM_DTR)
2418                 mcr &= ~MCR_DTR;
2419         if (clear & TIOCM_LOOP)
2420                 mcr &= ~MCR_LOOPBACK;
2421 
2422         edge_port->shadow_mcr = mcr;
2423         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2424 
2425         restore_mcr(edge_port, mcr);
2426         return 0;
2427 }
2428 
2429 static int edge_tiocmget(struct tty_struct *tty)
2430 {
2431         struct usb_serial_port *port = tty->driver_data;
2432         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2433         unsigned int result = 0;
2434         unsigned int msr;
2435         unsigned int mcr;
2436         unsigned long flags;
2437 
2438         spin_lock_irqsave(&edge_port->ep_lock, flags);
2439 
2440         msr = edge_port->shadow_msr;
2441         mcr = edge_port->shadow_mcr;
2442         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2443                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2444                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2445                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2446                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2447                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2448 
2449 
2450         dev_dbg(&port->dev, "%s -- %x\n", __func__, result);
2451         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2452 
2453         return result;
2454 }
2455 
2456 static int get_serial_info(struct edgeport_port *edge_port,
2457                                 struct serial_struct __user *retinfo)
2458 {
2459         struct serial_struct tmp;
2460         unsigned cwait;
2461 
2462         if (!retinfo)
2463                 return -EFAULT;
2464 
2465         cwait = edge_port->port->port.closing_wait;
2466         if (cwait != ASYNC_CLOSING_WAIT_NONE)
2467                 cwait = jiffies_to_msecs(cwait) / 10;
2468 
2469         memset(&tmp, 0, sizeof(tmp));
2470 
2471         tmp.type                = PORT_16550A;
2472         tmp.line                = edge_port->port->minor;
2473         tmp.port                = edge_port->port->port_number;
2474         tmp.irq                 = 0;
2475         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2476         tmp.xmit_fifo_size      = edge_port->port->bulk_out_size;
2477         tmp.baud_base           = 9600;
2478         tmp.close_delay         = 5*HZ;
2479         tmp.closing_wait        = cwait;
2480 
2481         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2482                 return -EFAULT;
2483         return 0;
2484 }
2485 
2486 static int edge_ioctl(struct tty_struct *tty,
2487                                         unsigned int cmd, unsigned long arg)
2488 {
2489         struct usb_serial_port *port = tty->driver_data;
2490         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2491 
2492         switch (cmd) {
2493         case TIOCGSERIAL:
2494                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
2495                 return get_serial_info(edge_port,
2496                                 (struct serial_struct __user *) arg);
2497         }
2498         return -ENOIOCTLCMD;
2499 }
2500 
2501 static void edge_break(struct tty_struct *tty, int break_state)
2502 {
2503         struct usb_serial_port *port = tty->driver_data;
2504         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2505         int status;
2506         int bv = 0;     /* Off */
2507 
2508         if (break_state == -1)
2509                 bv = 1; /* On */
2510         status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2511         if (status)
2512                 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n",
2513                         __func__, status);
2514 }
2515 
2516 static void edge_heartbeat_schedule(struct edgeport_serial *edge_serial)
2517 {
2518         if (!edge_serial->use_heartbeat)
2519                 return;
2520 
2521         schedule_delayed_work(&edge_serial->heartbeat_work,
2522                         FW_HEARTBEAT_SECS * HZ);
2523 }
2524 
2525 static void edge_heartbeat_work(struct work_struct *work)
2526 {
2527         struct edgeport_serial *serial;
2528         struct ti_i2c_desc *rom_desc;
2529 
2530         serial = container_of(work, struct edgeport_serial,
2531                         heartbeat_work.work);
2532 
2533         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
2534 
2535         /* Descriptor address request is enough to reset the firmware timer */
2536         if (!rom_desc || !get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
2537                         rom_desc)) {
2538                 dev_err(&serial->serial->interface->dev,
2539                                 "%s - Incomplete heartbeat\n", __func__);
2540         }
2541         kfree(rom_desc);
2542 
2543         edge_heartbeat_schedule(serial);
2544 }
2545 
2546 static int edge_startup(struct usb_serial *serial)
2547 {
2548         struct edgeport_serial *edge_serial;
2549         int status;
2550         u16 product_id;
2551 
2552         /* create our private serial structure */
2553         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2554         if (!edge_serial)
2555                 return -ENOMEM;
2556 
2557         mutex_init(&edge_serial->es_lock);
2558         edge_serial->serial = serial;
2559         usb_set_serial_data(serial, edge_serial);
2560 
2561         status = download_fw(edge_serial);
2562         if (status) {
2563                 kfree(edge_serial);
2564                 return status;
2565         }
2566 
2567         product_id = le16_to_cpu(
2568                         edge_serial->serial->dev->descriptor.idProduct);
2569 
2570         /* Currently only the EP/416 models require heartbeat support */
2571         if (edge_serial->fw_version > FW_HEARTBEAT_VERSION_CUTOFF) {
2572                 if (product_id == ION_DEVICE_ID_TI_EDGEPORT_416 ||
2573                         product_id == ION_DEVICE_ID_TI_EDGEPORT_416B) {
2574                         edge_serial->use_heartbeat = true;
2575                 }
2576         }
2577 
2578         INIT_DELAYED_WORK(&edge_serial->heartbeat_work, edge_heartbeat_work);
2579         edge_heartbeat_schedule(edge_serial);
2580 
2581         return 0;
2582 }
2583 
2584 static void edge_disconnect(struct usb_serial *serial)
2585 {
2586 }
2587 
2588 static void edge_release(struct usb_serial *serial)
2589 {
2590         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2591 
2592         cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2593         kfree(edge_serial);
2594 }
2595 
2596 static int edge_port_probe(struct usb_serial_port *port)
2597 {
2598         struct edgeport_port *edge_port;
2599         int ret;
2600 
2601         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2602         if (!edge_port)
2603                 return -ENOMEM;
2604 
2605         spin_lock_init(&edge_port->ep_lock);
2606         edge_port->port = port;
2607         edge_port->edge_serial = usb_get_serial_data(port->serial);
2608         edge_port->bUartMode = default_uart_mode;
2609 
2610         switch (port->port_number) {
2611         case 0:
2612                 edge_port->uart_base = UMPMEM_BASE_UART1;
2613                 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
2614                 break;
2615         case 1:
2616                 edge_port->uart_base = UMPMEM_BASE_UART2;
2617                 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
2618                 break;
2619         default:
2620                 dev_err(&port->dev, "unknown port number\n");
2621                 ret = -ENODEV;
2622                 goto err;
2623         }
2624 
2625         dev_dbg(&port->dev,
2626                 "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n",
2627                 __func__, port->port_number, edge_port->uart_base,
2628                 edge_port->dma_address);
2629 
2630         usb_set_serial_port_data(port, edge_port);
2631 
2632         ret = edge_create_sysfs_attrs(port);
2633         if (ret)
2634                 goto err;
2635 
2636         port->port.closing_wait = msecs_to_jiffies(closing_wait * 10);
2637         port->port.drain_delay = 1;
2638 
2639         return 0;
2640 err:
2641         kfree(edge_port);
2642 
2643         return ret;
2644 }
2645 
2646 static int edge_port_remove(struct usb_serial_port *port)
2647 {
2648         struct edgeport_port *edge_port;
2649 
2650         edge_port = usb_get_serial_port_data(port);
2651         edge_remove_sysfs_attrs(port);
2652         kfree(edge_port);
2653 
2654         return 0;
2655 }
2656 
2657 /* Sysfs Attributes */
2658 
2659 static ssize_t uart_mode_show(struct device *dev,
2660         struct device_attribute *attr, char *buf)
2661 {
2662         struct usb_serial_port *port = to_usb_serial_port(dev);
2663         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2664 
2665         return sprintf(buf, "%d\n", edge_port->bUartMode);
2666 }
2667 
2668 static ssize_t uart_mode_store(struct device *dev,
2669         struct device_attribute *attr, const char *valbuf, size_t count)
2670 {
2671         struct usb_serial_port *port = to_usb_serial_port(dev);
2672         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2673         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2674 
2675         dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v);
2676 
2677         if (v < 256)
2678                 edge_port->bUartMode = v;
2679         else
2680                 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2681 
2682         return count;
2683 }
2684 static DEVICE_ATTR_RW(uart_mode);
2685 
2686 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2687 {
2688         return device_create_file(&port->dev, &dev_attr_uart_mode);
2689 }
2690 
2691 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2692 {
2693         device_remove_file(&port->dev, &dev_attr_uart_mode);
2694         return 0;
2695 }
2696 
2697 #ifdef CONFIG_PM
2698 static int edge_suspend(struct usb_serial *serial, pm_message_t message)
2699 {
2700         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2701 
2702         cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2703 
2704         return 0;
2705 }
2706 
2707 static int edge_resume(struct usb_serial *serial)
2708 {
2709         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2710 
2711         edge_heartbeat_schedule(edge_serial);
2712 
2713         return 0;
2714 }
2715 #endif
2716 
2717 static struct usb_serial_driver edgeport_1port_device = {
2718         .driver = {
2719                 .owner          = THIS_MODULE,
2720                 .name           = "edgeport_ti_1",
2721         },
2722         .description            = "Edgeport TI 1 port adapter",
2723         .id_table               = edgeport_1port_id_table,
2724         .num_ports              = 1,
2725         .open                   = edge_open,
2726         .close                  = edge_close,
2727         .throttle               = edge_throttle,
2728         .unthrottle             = edge_unthrottle,
2729         .attach                 = edge_startup,
2730         .disconnect             = edge_disconnect,
2731         .release                = edge_release,
2732         .port_probe             = edge_port_probe,
2733         .port_remove            = edge_port_remove,
2734         .ioctl                  = edge_ioctl,
2735         .set_termios            = edge_set_termios,
2736         .tiocmget               = edge_tiocmget,
2737         .tiocmset               = edge_tiocmset,
2738         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2739         .get_icount             = usb_serial_generic_get_icount,
2740         .write                  = edge_write,
2741         .write_room             = edge_write_room,
2742         .chars_in_buffer        = edge_chars_in_buffer,
2743         .tx_empty               = edge_tx_empty,
2744         .break_ctl              = edge_break,
2745         .read_int_callback      = edge_interrupt_callback,
2746         .read_bulk_callback     = edge_bulk_in_callback,
2747         .write_bulk_callback    = edge_bulk_out_callback,
2748 #ifdef CONFIG_PM
2749         .suspend                = edge_suspend,
2750         .resume                 = edge_resume,
2751 #endif
2752 };
2753 
2754 static struct usb_serial_driver edgeport_2port_device = {
2755         .driver = {
2756                 .owner          = THIS_MODULE,
2757                 .name           = "edgeport_ti_2",
2758         },
2759         .description            = "Edgeport TI 2 port adapter",
2760         .id_table               = edgeport_2port_id_table,
2761         .num_ports              = 2,
2762         .open                   = edge_open,
2763         .close                  = edge_close,
2764         .throttle               = edge_throttle,
2765         .unthrottle             = edge_unthrottle,
2766         .attach                 = edge_startup,
2767         .disconnect             = edge_disconnect,
2768         .release                = edge_release,
2769         .port_probe             = edge_port_probe,
2770         .port_remove            = edge_port_remove,
2771         .ioctl                  = edge_ioctl,
2772         .set_termios            = edge_set_termios,
2773         .tiocmget               = edge_tiocmget,
2774         .tiocmset               = edge_tiocmset,
2775         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2776         .get_icount             = usb_serial_generic_get_icount,
2777         .write                  = edge_write,
2778         .write_room             = edge_write_room,
2779         .chars_in_buffer        = edge_chars_in_buffer,
2780         .tx_empty               = edge_tx_empty,
2781         .break_ctl              = edge_break,
2782         .read_int_callback      = edge_interrupt_callback,
2783         .read_bulk_callback     = edge_bulk_in_callback,
2784         .write_bulk_callback    = edge_bulk_out_callback,
2785 #ifdef CONFIG_PM
2786         .suspend                = edge_suspend,
2787         .resume                 = edge_resume,
2788 #endif
2789 };
2790 
2791 static struct usb_serial_driver * const serial_drivers[] = {
2792         &edgeport_1port_device, &edgeport_2port_device, NULL
2793 };
2794 
2795 module_usb_serial_driver(serial_drivers, id_table_combined);
2796 
2797 MODULE_AUTHOR(DRIVER_AUTHOR);
2798 MODULE_DESCRIPTION(DRIVER_DESC);
2799 MODULE_LICENSE("GPL");
2800 MODULE_FIRMWARE("edgeport/down3.bin");
2801 
2802 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2803 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2804 
2805 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2806 MODULE_PARM_DESC(ignore_cpu_rev,
2807                         "Ignore the cpu revision when connecting to a device");
2808 
2809 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
2810 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
2811 

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