Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

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

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