Version:  2.0.40 2.2.26 2.4.37 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 3.18

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_wakeup(tty);
1461         }
1462         tty_kref_put(tty);
1463 }
1464 
1465 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1466                                                         __u8 lsr, __u8 data)
1467 {
1468         struct async_icount *icount;
1469         __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1470                                                 LSR_FRM_ERR | LSR_BREAK));
1471 
1472         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr);
1473 
1474         edge_port->shadow_lsr = lsr;
1475 
1476         if (new_lsr & LSR_BREAK)
1477                 /*
1478                  * Parity and Framing errors only count if they
1479                  * occur exclusive of a break being received.
1480                  */
1481                 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1482 
1483         /* Place LSR data byte into Rx buffer */
1484         if (lsr_data)
1485                 edge_tty_recv(edge_port->port, &data, 1);
1486 
1487         /* update input line counters */
1488         icount = &edge_port->port->icount;
1489         if (new_lsr & LSR_BREAK)
1490                 icount->brk++;
1491         if (new_lsr & LSR_OVER_ERR)
1492                 icount->overrun++;
1493         if (new_lsr & LSR_PAR_ERR)
1494                 icount->parity++;
1495         if (new_lsr & LSR_FRM_ERR)
1496                 icount->frame++;
1497 }
1498 
1499 
1500 static void edge_interrupt_callback(struct urb *urb)
1501 {
1502         struct edgeport_serial *edge_serial = urb->context;
1503         struct usb_serial_port *port;
1504         struct edgeport_port *edge_port;
1505         struct device *dev;
1506         unsigned char *data = urb->transfer_buffer;
1507         int length = urb->actual_length;
1508         int port_number;
1509         int function;
1510         int retval;
1511         __u8 lsr;
1512         __u8 msr;
1513         int status = urb->status;
1514 
1515         switch (status) {
1516         case 0:
1517                 /* success */
1518                 break;
1519         case -ECONNRESET:
1520         case -ENOENT:
1521         case -ESHUTDOWN:
1522                 /* this urb is terminated, clean up */
1523                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1524                     __func__, status);
1525                 return;
1526         default:
1527                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1528                         "%d\n", __func__, status);
1529                 goto exit;
1530         }
1531 
1532         if (!length) {
1533                 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__);
1534                 goto exit;
1535         }
1536 
1537         dev = &edge_serial->serial->dev->dev;
1538         usb_serial_debug_data(dev, __func__, length, data);
1539 
1540         if (length != 2) {
1541                 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length);
1542                 goto exit;
1543         }
1544 
1545         port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1546         function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1547         dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
1548                 port_number, function, data[1]);
1549         port = edge_serial->serial->port[port_number];
1550         edge_port = usb_get_serial_port_data(port);
1551         if (!edge_port) {
1552                 dev_dbg(dev, "%s - edge_port not found\n", __func__);
1553                 return;
1554         }
1555         switch (function) {
1556         case TIUMP_INTERRUPT_CODE_LSR:
1557                 lsr = map_line_status(data[1]);
1558                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1559                         /* Save the LSR event for bulk read
1560                            completion routine */
1561                         dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n",
1562                                 __func__, port_number, lsr);
1563                         edge_port->lsr_event = 1;
1564                         edge_port->lsr_mask = lsr;
1565                 } else {
1566                         dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n",
1567                                 __func__, port_number, lsr);
1568                         handle_new_lsr(edge_port, 0, lsr, 0);
1569                 }
1570                 break;
1571 
1572         case TIUMP_INTERRUPT_CODE_MSR:  /* MSR */
1573                 /* Copy MSR from UMP */
1574                 msr = data[1];
1575                 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n",
1576                         __func__, port_number, msr);
1577                 handle_new_msr(edge_port, msr);
1578                 break;
1579 
1580         default:
1581                 dev_err(&urb->dev->dev,
1582                         "%s - Unknown Interrupt code from UMP %x\n",
1583                         __func__, data[1]);
1584                 break;
1585 
1586         }
1587 
1588 exit:
1589         retval = usb_submit_urb(urb, GFP_ATOMIC);
1590         if (retval)
1591                 dev_err(&urb->dev->dev,
1592                         "%s - usb_submit_urb failed with result %d\n",
1593                          __func__, retval);
1594 }
1595 
1596 static void edge_bulk_in_callback(struct urb *urb)
1597 {
1598         struct edgeport_port *edge_port = urb->context;
1599         struct device *dev = &edge_port->port->dev;
1600         unsigned char *data = urb->transfer_buffer;
1601         int retval = 0;
1602         int port_number;
1603         int status = urb->status;
1604 
1605         switch (status) {
1606         case 0:
1607                 /* success */
1608                 break;
1609         case -ECONNRESET:
1610         case -ENOENT:
1611         case -ESHUTDOWN:
1612                 /* this urb is terminated, clean up */
1613                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
1614                 return;
1615         default:
1616                 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status);
1617         }
1618 
1619         if (status == -EPIPE)
1620                 goto exit;
1621 
1622         if (status) {
1623                 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1624                 return;
1625         }
1626 
1627         port_number = edge_port->port->port_number;
1628 
1629         if (edge_port->lsr_event) {
1630                 edge_port->lsr_event = 0;
1631                 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n",
1632                         __func__, port_number, edge_port->lsr_mask, *data);
1633                 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1634                 /* Adjust buffer length/pointer */
1635                 --urb->actual_length;
1636                 ++data;
1637         }
1638 
1639         if (urb->actual_length) {
1640                 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
1641                 if (edge_port->close_pending)
1642                         dev_dbg(dev, "%s - close pending, dropping data on the floor\n",
1643                                                                 __func__);
1644                 else
1645                         edge_tty_recv(edge_port->port, data,
1646                                         urb->actual_length);
1647                 edge_port->port->icount.rx += urb->actual_length;
1648         }
1649 
1650 exit:
1651         /* continue read unless stopped */
1652         spin_lock(&edge_port->ep_lock);
1653         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1654                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1655         else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1656                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1657 
1658         spin_unlock(&edge_port->ep_lock);
1659         if (retval)
1660                 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);
1661 }
1662 
1663 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1664                 int length)
1665 {
1666         int queued;
1667 
1668         queued = tty_insert_flip_string(&port->port, data, length);
1669         if (queued < length)
1670                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1671                         __func__, length - queued);
1672         tty_flip_buffer_push(&port->port);
1673 }
1674 
1675 static void edge_bulk_out_callback(struct urb *urb)
1676 {
1677         struct usb_serial_port *port = urb->context;
1678         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1679         int status = urb->status;
1680         struct tty_struct *tty;
1681 
1682         edge_port->ep_write_urb_in_use = 0;
1683 
1684         switch (status) {
1685         case 0:
1686                 /* success */
1687                 break;
1688         case -ECONNRESET:
1689         case -ENOENT:
1690         case -ESHUTDOWN:
1691                 /* this urb is terminated, clean up */
1692                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1693                     __func__, status);
1694                 return;
1695         default:
1696                 dev_err_console(port, "%s - nonzero write bulk status "
1697                         "received: %d\n", __func__, status);
1698         }
1699 
1700         /* send any buffered data */
1701         tty = tty_port_tty_get(&port->port);
1702         edge_send(port, tty);
1703         tty_kref_put(tty);
1704 }
1705 
1706 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1707 {
1708         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1709         struct edgeport_serial *edge_serial;
1710         struct usb_device *dev;
1711         struct urb *urb;
1712         int port_number;
1713         int status;
1714         u16 open_settings;
1715         u8 transaction_timeout;
1716 
1717         if (edge_port == NULL)
1718                 return -ENODEV;
1719 
1720         port_number = port->port_number;
1721 
1722         dev = port->serial->dev;
1723 
1724         /* turn off loopback */
1725         status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1726         if (status) {
1727                 dev_err(&port->dev,
1728                                 "%s - cannot send clear loopback command, %d\n",
1729                         __func__, status);
1730                 return status;
1731         }
1732 
1733         /* set up the port settings */
1734         if (tty)
1735                 edge_set_termios(tty, port, &tty->termios);
1736 
1737         /* open up the port */
1738 
1739         /* milliseconds to timeout for DMA transfer */
1740         transaction_timeout = 2;
1741 
1742         edge_port->ump_read_timeout =
1743                                 max(20, ((transaction_timeout * 3) / 2));
1744 
1745         /* milliseconds to timeout for DMA transfer */
1746         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1747                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1748                              (transaction_timeout << 2));
1749 
1750         dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__);
1751 
1752         /* Tell TI to open and start the port */
1753         status = send_cmd(dev, UMPC_OPEN_PORT,
1754                 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1755         if (status) {
1756                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1757                                                         __func__, status);
1758                 return status;
1759         }
1760 
1761         /* Start the DMA? */
1762         status = send_cmd(dev, UMPC_START_PORT,
1763                 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1764         if (status) {
1765                 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1766                                                         __func__, status);
1767                 return status;
1768         }
1769 
1770         /* Clear TX and RX buffers in UMP */
1771         status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1772         if (status) {
1773                 dev_err(&port->dev,
1774                         "%s - cannot send clear buffers command, %d\n",
1775                         __func__, status);
1776                 return status;
1777         }
1778 
1779         /* Read Initial MSR */
1780         status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1781                                 (__u16)(UMPM_UART1_PORT + port_number),
1782                                 &edge_port->shadow_msr, 1);
1783         if (status) {
1784                 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1785                                                         __func__, status);
1786                 return status;
1787         }
1788 
1789         dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr);
1790 
1791         /* Set Initial MCR */
1792         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1793         dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr);
1794 
1795         edge_serial = edge_port->edge_serial;
1796         if (mutex_lock_interruptible(&edge_serial->es_lock))
1797                 return -ERESTARTSYS;
1798         if (edge_serial->num_ports_open == 0) {
1799                 /* we are the first port to open, post the interrupt urb */
1800                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1801                 if (!urb) {
1802                         dev_err(&port->dev,
1803                                 "%s - no interrupt urb present, exiting\n",
1804                                 __func__);
1805                         status = -EINVAL;
1806                         goto release_es_lock;
1807                 }
1808                 urb->context = edge_serial;
1809                 status = usb_submit_urb(urb, GFP_KERNEL);
1810                 if (status) {
1811                         dev_err(&port->dev,
1812                                 "%s - usb_submit_urb failed with value %d\n",
1813                                         __func__, status);
1814                         goto release_es_lock;
1815                 }
1816         }
1817 
1818         /*
1819          * reset the data toggle on the bulk endpoints to work around bug in
1820          * host controllers where things get out of sync some times
1821          */
1822         usb_clear_halt(dev, port->write_urb->pipe);
1823         usb_clear_halt(dev, port->read_urb->pipe);
1824 
1825         /* start up our bulk read urb */
1826         urb = port->read_urb;
1827         if (!urb) {
1828                 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1829                                                                 __func__);
1830                 status = -EINVAL;
1831                 goto unlink_int_urb;
1832         }
1833         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1834         urb->context = edge_port;
1835         status = usb_submit_urb(urb, GFP_KERNEL);
1836         if (status) {
1837                 dev_err(&port->dev,
1838                         "%s - read bulk usb_submit_urb failed with value %d\n",
1839                                 __func__, status);
1840                 goto unlink_int_urb;
1841         }
1842 
1843         ++edge_serial->num_ports_open;
1844 
1845         goto release_es_lock;
1846 
1847 unlink_int_urb:
1848         if (edge_port->edge_serial->num_ports_open == 0)
1849                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1850 release_es_lock:
1851         mutex_unlock(&edge_serial->es_lock);
1852         return status;
1853 }
1854 
1855 static void edge_close(struct usb_serial_port *port)
1856 {
1857         struct edgeport_serial *edge_serial;
1858         struct edgeport_port *edge_port;
1859         struct usb_serial *serial = port->serial;
1860         unsigned long flags;
1861         int port_number;
1862 
1863         edge_serial = usb_get_serial_data(port->serial);
1864         edge_port = usb_get_serial_port_data(port);
1865         if (edge_serial == NULL || edge_port == NULL)
1866                 return;
1867 
1868         /* The bulkreadcompletion routine will check
1869          * this flag and dump add read data */
1870         edge_port->close_pending = 1;
1871 
1872         usb_kill_urb(port->read_urb);
1873         usb_kill_urb(port->write_urb);
1874         edge_port->ep_write_urb_in_use = 0;
1875         spin_lock_irqsave(&edge_port->ep_lock, flags);
1876         kfifo_reset_out(&port->write_fifo);
1877         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1878 
1879         dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
1880         port_number = port->port_number;
1881         send_cmd(serial->dev, UMPC_CLOSE_PORT,
1882                      (__u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1883 
1884         mutex_lock(&edge_serial->es_lock);
1885         --edge_port->edge_serial->num_ports_open;
1886         if (edge_port->edge_serial->num_ports_open <= 0) {
1887                 /* last port is now closed, let's shut down our interrupt urb */
1888                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1889                 edge_port->edge_serial->num_ports_open = 0;
1890         }
1891         mutex_unlock(&edge_serial->es_lock);
1892         edge_port->close_pending = 0;
1893 }
1894 
1895 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1896                                 const unsigned char *data, int count)
1897 {
1898         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1899 
1900         if (count == 0) {
1901                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
1902                 return 0;
1903         }
1904 
1905         if (edge_port == NULL)
1906                 return -ENODEV;
1907         if (edge_port->close_pending == 1)
1908                 return -ENODEV;
1909 
1910         count = kfifo_in_locked(&port->write_fifo, data, count,
1911                                                         &edge_port->ep_lock);
1912         edge_send(port, tty);
1913 
1914         return count;
1915 }
1916 
1917 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty)
1918 {
1919         int count, result;
1920         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1921         unsigned long flags;
1922 
1923         spin_lock_irqsave(&edge_port->ep_lock, flags);
1924 
1925         if (edge_port->ep_write_urb_in_use) {
1926                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1927                 return;
1928         }
1929 
1930         count = kfifo_out(&port->write_fifo,
1931                                 port->write_urb->transfer_buffer,
1932                                 port->bulk_out_size);
1933 
1934         if (count == 0) {
1935                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1936                 return;
1937         }
1938 
1939         edge_port->ep_write_urb_in_use = 1;
1940 
1941         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1942 
1943         usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer);
1944 
1945         /* set up our urb */
1946         port->write_urb->transfer_buffer_length = count;
1947 
1948         /* send the data out the bulk port */
1949         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1950         if (result) {
1951                 dev_err_console(port,
1952                         "%s - failed submitting write urb, error %d\n",
1953                                 __func__, result);
1954                 edge_port->ep_write_urb_in_use = 0;
1955                 /* TODO: reschedule edge_send */
1956         } else
1957                 edge_port->port->icount.tx += count;
1958 
1959         /* wakeup any process waiting for writes to complete */
1960         /* there is now more room in the buffer for new writes */
1961         if (tty)
1962                 tty_wakeup(tty);
1963 }
1964 
1965 static int edge_write_room(struct tty_struct *tty)
1966 {
1967         struct usb_serial_port *port = tty->driver_data;
1968         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1969         int room = 0;
1970         unsigned long flags;
1971 
1972         if (edge_port == NULL)
1973                 return 0;
1974         if (edge_port->close_pending == 1)
1975                 return 0;
1976 
1977         spin_lock_irqsave(&edge_port->ep_lock, flags);
1978         room = kfifo_avail(&port->write_fifo);
1979         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1980 
1981         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1982         return room;
1983 }
1984 
1985 static int edge_chars_in_buffer(struct tty_struct *tty)
1986 {
1987         struct usb_serial_port *port = tty->driver_data;
1988         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1989         int chars = 0;
1990         unsigned long flags;
1991         if (edge_port == NULL)
1992                 return 0;
1993 
1994         spin_lock_irqsave(&edge_port->ep_lock, flags);
1995         chars = kfifo_len(&port->write_fifo);
1996         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1997 
1998         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1999         return chars;
2000 }
2001 
2002 static bool edge_tx_empty(struct usb_serial_port *port)
2003 {
2004         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2005         int ret;
2006 
2007         ret = tx_active(edge_port);
2008         if (ret > 0)
2009                 return false;
2010 
2011         return true;
2012 }
2013 
2014 static void edge_throttle(struct tty_struct *tty)
2015 {
2016         struct usb_serial_port *port = tty->driver_data;
2017         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2018         int status;
2019 
2020         if (edge_port == NULL)
2021                 return;
2022 
2023         /* if we are implementing XON/XOFF, send the stop character */
2024         if (I_IXOFF(tty)) {
2025                 unsigned char stop_char = STOP_CHAR(tty);
2026                 status = edge_write(tty, port, &stop_char, 1);
2027                 if (status <= 0) {
2028                         dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2029                 }
2030         }
2031 
2032         /* if we are implementing RTS/CTS, stop reads */
2033         /* and the Edgeport will clear the RTS line */
2034         if (C_CRTSCTS(tty))
2035                 stop_read(edge_port);
2036 
2037 }
2038 
2039 static void edge_unthrottle(struct tty_struct *tty)
2040 {
2041         struct usb_serial_port *port = tty->driver_data;
2042         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2043         int status;
2044 
2045         if (edge_port == NULL)
2046                 return;
2047 
2048         /* if we are implementing XON/XOFF, send the start character */
2049         if (I_IXOFF(tty)) {
2050                 unsigned char start_char = START_CHAR(tty);
2051                 status = edge_write(tty, port, &start_char, 1);
2052                 if (status <= 0) {
2053                         dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2054                 }
2055         }
2056         /* if we are implementing RTS/CTS, restart reads */
2057         /* are the Edgeport will assert the RTS line */
2058         if (C_CRTSCTS(tty)) {
2059                 status = restart_read(edge_port);
2060                 if (status)
2061                         dev_err(&port->dev,
2062                                 "%s - read bulk usb_submit_urb failed: %d\n",
2063                                                         __func__, status);
2064         }
2065 
2066 }
2067 
2068 static void stop_read(struct edgeport_port *edge_port)
2069 {
2070         unsigned long flags;
2071 
2072         spin_lock_irqsave(&edge_port->ep_lock, flags);
2073 
2074         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2075                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2076         edge_port->shadow_mcr &= ~MCR_RTS;
2077 
2078         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2079 }
2080 
2081 static int restart_read(struct edgeport_port *edge_port)
2082 {
2083         struct urb *urb;
2084         int status = 0;
2085         unsigned long flags;
2086 
2087         spin_lock_irqsave(&edge_port->ep_lock, flags);
2088 
2089         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2090                 urb = edge_port->port->read_urb;
2091                 status = usb_submit_urb(urb, GFP_ATOMIC);
2092         }
2093         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2094         edge_port->shadow_mcr |= MCR_RTS;
2095 
2096         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2097 
2098         return status;
2099 }
2100 
2101 static void change_port_settings(struct tty_struct *tty,
2102                 struct edgeport_port *edge_port, struct ktermios *old_termios)
2103 {
2104         struct device *dev = &edge_port->port->dev;
2105         struct ump_uart_config *config;
2106         int baud;
2107         unsigned cflag;
2108         int status;
2109         int port_number = edge_port->port->port_number;
2110 
2111         config = kmalloc (sizeof (*config), GFP_KERNEL);
2112         if (!config) {
2113                 tty->termios = *old_termios;
2114                 return;
2115         }
2116 
2117         cflag = tty->termios.c_cflag;
2118 
2119         config->wFlags = 0;
2120 
2121         /* These flags must be set */
2122         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2123         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2124         config->bUartMode = (__u8)(edge_port->bUartMode);
2125 
2126         switch (cflag & CSIZE) {
2127         case CS5:
2128                     config->bDataBits = UMP_UART_CHAR5BITS;
2129                     dev_dbg(dev, "%s - data bits = 5\n", __func__);
2130                     break;
2131         case CS6:
2132                     config->bDataBits = UMP_UART_CHAR6BITS;
2133                     dev_dbg(dev, "%s - data bits = 6\n", __func__);
2134                     break;
2135         case CS7:
2136                     config->bDataBits = UMP_UART_CHAR7BITS;
2137                     dev_dbg(dev, "%s - data bits = 7\n", __func__);
2138                     break;
2139         default:
2140         case CS8:
2141                     config->bDataBits = UMP_UART_CHAR8BITS;
2142                     dev_dbg(dev, "%s - data bits = 8\n", __func__);
2143                             break;
2144         }
2145 
2146         if (cflag & PARENB) {
2147                 if (cflag & PARODD) {
2148                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2149                         config->bParity = UMP_UART_ODDPARITY;
2150                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2151                 } else {
2152                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2153                         config->bParity = UMP_UART_EVENPARITY;
2154                         dev_dbg(dev, "%s - parity = even\n", __func__);
2155                 }
2156         } else {
2157                 config->bParity = UMP_UART_NOPARITY;
2158                 dev_dbg(dev, "%s - parity = none\n", __func__);
2159         }
2160 
2161         if (cflag & CSTOPB) {
2162                 config->bStopBits = UMP_UART_STOPBIT2;
2163                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2164         } else {
2165                 config->bStopBits = UMP_UART_STOPBIT1;
2166                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2167         }
2168 
2169         /* figure out the flow control settings */
2170         if (cflag & CRTSCTS) {
2171                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2172                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2173                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2174         } else {
2175                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2176                 restart_read(edge_port);
2177         }
2178 
2179         /* if we are implementing XON/XOFF, set the start and stop
2180            character in the device */
2181         config->cXon  = START_CHAR(tty);
2182         config->cXoff = STOP_CHAR(tty);
2183 
2184         /* if we are implementing INBOUND XON/XOFF */
2185         if (I_IXOFF(tty)) {
2186                 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2187                 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2188                         __func__, config->cXon, config->cXoff);
2189         } else
2190                 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2191 
2192         /* if we are implementing OUTBOUND XON/XOFF */
2193         if (I_IXON(tty)) {
2194                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2195                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2196                         __func__, config->cXon, config->cXoff);
2197         } else
2198                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2199 
2200         tty->termios.c_cflag &= ~CMSPAR;
2201 
2202         /* Round the baud rate */
2203         baud = tty_get_baud_rate(tty);
2204         if (!baud) {
2205                 /* pick a default, any default... */
2206                 baud = 9600;
2207         } else
2208                 tty_encode_baud_rate(tty, baud, baud);
2209 
2210         edge_port->baud_rate = baud;
2211         config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2212 
2213         /* FIXME: Recompute actual baud from divisor here */
2214 
2215         dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate);
2216 
2217         dev_dbg(dev, "wBaudRate:   %d\n", (int)(461550L / config->wBaudRate));
2218         dev_dbg(dev, "wFlags:    0x%x\n", config->wFlags);
2219         dev_dbg(dev, "bDataBits:   %d\n", config->bDataBits);
2220         dev_dbg(dev, "bParity:     %d\n", config->bParity);
2221         dev_dbg(dev, "bStopBits:   %d\n", config->bStopBits);
2222         dev_dbg(dev, "cXon:        %d\n", config->cXon);
2223         dev_dbg(dev, "cXoff:       %d\n", config->cXoff);
2224         dev_dbg(dev, "bUartMode:   %d\n", config->bUartMode);
2225 
2226         /* move the word values into big endian mode */
2227         cpu_to_be16s(&config->wFlags);
2228         cpu_to_be16s(&config->wBaudRate);
2229 
2230         status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2231                                 (__u8)(UMPM_UART1_PORT + port_number),
2232                                 0, (__u8 *)config, sizeof(*config));
2233         if (status)
2234                 dev_dbg(dev, "%s - error %d when trying to write config to device\n",
2235                         __func__, status);
2236         kfree(config);
2237 }
2238 
2239 static void edge_set_termios(struct tty_struct *tty,
2240                 struct usb_serial_port *port, struct ktermios *old_termios)
2241 {
2242         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2243         unsigned int cflag;
2244 
2245         cflag = tty->termios.c_cflag;
2246 
2247         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2248                 tty->termios.c_cflag, tty->termios.c_iflag);
2249         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2250                 old_termios->c_cflag, old_termios->c_iflag);
2251 
2252         if (edge_port == NULL)
2253                 return;
2254         /* change the port settings to the new ones specified */
2255         change_port_settings(tty, edge_port, old_termios);
2256 }
2257 
2258 static int edge_tiocmset(struct tty_struct *tty,
2259                                         unsigned int set, unsigned int clear)
2260 {
2261         struct usb_serial_port *port = tty->driver_data;
2262         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2263         unsigned int mcr;
2264         unsigned long flags;
2265 
2266         spin_lock_irqsave(&edge_port->ep_lock, flags);
2267         mcr = edge_port->shadow_mcr;
2268         if (set & TIOCM_RTS)
2269                 mcr |= MCR_RTS;
2270         if (set & TIOCM_DTR)
2271                 mcr |= MCR_DTR;
2272         if (set & TIOCM_LOOP)
2273                 mcr |= MCR_LOOPBACK;
2274 
2275         if (clear & TIOCM_RTS)
2276                 mcr &= ~MCR_RTS;
2277         if (clear & TIOCM_DTR)
2278                 mcr &= ~MCR_DTR;
2279         if (clear & TIOCM_LOOP)
2280                 mcr &= ~MCR_LOOPBACK;
2281 
2282         edge_port->shadow_mcr = mcr;
2283         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2284 
2285         restore_mcr(edge_port, mcr);
2286         return 0;
2287 }
2288 
2289 static int edge_tiocmget(struct tty_struct *tty)
2290 {
2291         struct usb_serial_port *port = tty->driver_data;
2292         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2293         unsigned int result = 0;
2294         unsigned int msr;
2295         unsigned int mcr;
2296         unsigned long flags;
2297 
2298         spin_lock_irqsave(&edge_port->ep_lock, flags);
2299 
2300         msr = edge_port->shadow_msr;
2301         mcr = edge_port->shadow_mcr;
2302         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2303                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2304                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2305                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2306                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2307                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2308 
2309 
2310         dev_dbg(&port->dev, "%s -- %x\n", __func__, result);
2311         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2312 
2313         return result;
2314 }
2315 
2316 static int get_serial_info(struct edgeport_port *edge_port,
2317                                 struct serial_struct __user *retinfo)
2318 {
2319         struct serial_struct tmp;
2320         unsigned cwait;
2321 
2322         if (!retinfo)
2323                 return -EFAULT;
2324 
2325         cwait = edge_port->port->port.closing_wait;
2326         if (cwait != ASYNC_CLOSING_WAIT_NONE)
2327                 cwait = jiffies_to_msecs(cwait) / 10;
2328 
2329         memset(&tmp, 0, sizeof(tmp));
2330 
2331         tmp.type                = PORT_16550A;
2332         tmp.line                = edge_port->port->minor;
2333         tmp.port                = edge_port->port->port_number;
2334         tmp.irq                 = 0;
2335         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2336         tmp.xmit_fifo_size      = edge_port->port->bulk_out_size;
2337         tmp.baud_base           = 9600;
2338         tmp.close_delay         = 5*HZ;
2339         tmp.closing_wait        = cwait;
2340 
2341         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2342                 return -EFAULT;
2343         return 0;
2344 }
2345 
2346 static int edge_ioctl(struct tty_struct *tty,
2347                                         unsigned int cmd, unsigned long arg)
2348 {
2349         struct usb_serial_port *port = tty->driver_data;
2350         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2351 
2352         switch (cmd) {
2353         case TIOCGSERIAL:
2354                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
2355                 return get_serial_info(edge_port,
2356                                 (struct serial_struct __user *) arg);
2357         }
2358         return -ENOIOCTLCMD;
2359 }
2360 
2361 static void edge_break(struct tty_struct *tty, int break_state)
2362 {
2363         struct usb_serial_port *port = tty->driver_data;
2364         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2365         int status;
2366         int bv = 0;     /* Off */
2367 
2368         if (break_state == -1)
2369                 bv = 1; /* On */
2370         status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2371         if (status)
2372                 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n",
2373                         __func__, status);
2374 }
2375 
2376 static int edge_startup(struct usb_serial *serial)
2377 {
2378         struct edgeport_serial *edge_serial;
2379         int status;
2380 
2381         /* create our private serial structure */
2382         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2383         if (!edge_serial)
2384                 return -ENOMEM;
2385 
2386         mutex_init(&edge_serial->es_lock);
2387         edge_serial->serial = serial;
2388         usb_set_serial_data(serial, edge_serial);
2389 
2390         status = download_fw(edge_serial);
2391         if (status) {
2392                 kfree(edge_serial);
2393                 return status;
2394         }
2395 
2396         return 0;
2397 }
2398 
2399 static void edge_disconnect(struct usb_serial *serial)
2400 {
2401 }
2402 
2403 static void edge_release(struct usb_serial *serial)
2404 {
2405         kfree(usb_get_serial_data(serial));
2406 }
2407 
2408 static int edge_port_probe(struct usb_serial_port *port)
2409 {
2410         struct edgeport_port *edge_port;
2411         int ret;
2412 
2413         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2414         if (!edge_port)
2415                 return -ENOMEM;
2416 
2417         spin_lock_init(&edge_port->ep_lock);
2418         edge_port->port = port;
2419         edge_port->edge_serial = usb_get_serial_data(port->serial);
2420         edge_port->bUartMode = default_uart_mode;
2421 
2422         switch (port->port_number) {
2423         case 0:
2424                 edge_port->uart_base = UMPMEM_BASE_UART1;
2425                 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
2426                 break;
2427         case 1:
2428                 edge_port->uart_base = UMPMEM_BASE_UART2;
2429                 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
2430                 break;
2431         default:
2432                 dev_err(&port->dev, "unknown port number\n");
2433                 ret = -ENODEV;
2434                 goto err;
2435         }
2436 
2437         dev_dbg(&port->dev,
2438                 "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n",
2439                 __func__, port->port_number, edge_port->uart_base,
2440                 edge_port->dma_address);
2441 
2442         usb_set_serial_port_data(port, edge_port);
2443 
2444         ret = edge_create_sysfs_attrs(port);
2445         if (ret)
2446                 goto err;
2447 
2448         port->port.closing_wait = msecs_to_jiffies(closing_wait * 10);
2449         port->port.drain_delay = 1;
2450 
2451         return 0;
2452 err:
2453         kfree(edge_port);
2454 
2455         return ret;
2456 }
2457 
2458 static int edge_port_remove(struct usb_serial_port *port)
2459 {
2460         struct edgeport_port *edge_port;
2461 
2462         edge_port = usb_get_serial_port_data(port);
2463         edge_remove_sysfs_attrs(port);
2464         kfree(edge_port);
2465 
2466         return 0;
2467 }
2468 
2469 /* Sysfs Attributes */
2470 
2471 static ssize_t uart_mode_show(struct device *dev,
2472         struct device_attribute *attr, char *buf)
2473 {
2474         struct usb_serial_port *port = to_usb_serial_port(dev);
2475         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2476 
2477         return sprintf(buf, "%d\n", edge_port->bUartMode);
2478 }
2479 
2480 static ssize_t uart_mode_store(struct device *dev,
2481         struct device_attribute *attr, const char *valbuf, size_t count)
2482 {
2483         struct usb_serial_port *port = to_usb_serial_port(dev);
2484         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2485         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2486 
2487         dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v);
2488 
2489         if (v < 256)
2490                 edge_port->bUartMode = v;
2491         else
2492                 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2493 
2494         return count;
2495 }
2496 static DEVICE_ATTR_RW(uart_mode);
2497 
2498 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2499 {
2500         return device_create_file(&port->dev, &dev_attr_uart_mode);
2501 }
2502 
2503 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2504 {
2505         device_remove_file(&port->dev, &dev_attr_uart_mode);
2506         return 0;
2507 }
2508 
2509 
2510 static struct usb_serial_driver edgeport_1port_device = {
2511         .driver = {
2512                 .owner          = THIS_MODULE,
2513                 .name           = "edgeport_ti_1",
2514         },
2515         .description            = "Edgeport TI 1 port adapter",
2516         .id_table               = edgeport_1port_id_table,
2517         .num_ports              = 1,
2518         .open                   = edge_open,
2519         .close                  = edge_close,
2520         .throttle               = edge_throttle,
2521         .unthrottle             = edge_unthrottle,
2522         .attach                 = edge_startup,
2523         .disconnect             = edge_disconnect,
2524         .release                = edge_release,
2525         .port_probe             = edge_port_probe,
2526         .port_remove            = edge_port_remove,
2527         .ioctl                  = edge_ioctl,
2528         .set_termios            = edge_set_termios,
2529         .tiocmget               = edge_tiocmget,
2530         .tiocmset               = edge_tiocmset,
2531         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2532         .get_icount             = usb_serial_generic_get_icount,
2533         .write                  = edge_write,
2534         .write_room             = edge_write_room,
2535         .chars_in_buffer        = edge_chars_in_buffer,
2536         .tx_empty               = edge_tx_empty,
2537         .break_ctl              = edge_break,
2538         .read_int_callback      = edge_interrupt_callback,
2539         .read_bulk_callback     = edge_bulk_in_callback,
2540         .write_bulk_callback    = edge_bulk_out_callback,
2541 };
2542 
2543 static struct usb_serial_driver edgeport_2port_device = {
2544         .driver = {
2545                 .owner          = THIS_MODULE,
2546                 .name           = "edgeport_ti_2",
2547         },
2548         .description            = "Edgeport TI 2 port adapter",
2549         .id_table               = edgeport_2port_id_table,
2550         .num_ports              = 2,
2551         .open                   = edge_open,
2552         .close                  = edge_close,
2553         .throttle               = edge_throttle,
2554         .unthrottle             = edge_unthrottle,
2555         .attach                 = edge_startup,
2556         .disconnect             = edge_disconnect,
2557         .release                = edge_release,
2558         .port_probe             = edge_port_probe,
2559         .port_remove            = edge_port_remove,
2560         .ioctl                  = edge_ioctl,
2561         .set_termios            = edge_set_termios,
2562         .tiocmget               = edge_tiocmget,
2563         .tiocmset               = edge_tiocmset,
2564         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2565         .get_icount             = usb_serial_generic_get_icount,
2566         .write                  = edge_write,
2567         .write_room             = edge_write_room,
2568         .chars_in_buffer        = edge_chars_in_buffer,
2569         .tx_empty               = edge_tx_empty,
2570         .break_ctl              = edge_break,
2571         .read_int_callback      = edge_interrupt_callback,
2572         .read_bulk_callback     = edge_bulk_in_callback,
2573         .write_bulk_callback    = edge_bulk_out_callback,
2574 };
2575 
2576 static struct usb_serial_driver * const serial_drivers[] = {
2577         &edgeport_1port_device, &edgeport_2port_device, NULL
2578 };
2579 
2580 module_usb_serial_driver(serial_drivers, id_table_combined);
2581 
2582 MODULE_AUTHOR(DRIVER_AUTHOR);
2583 MODULE_DESCRIPTION(DRIVER_DESC);
2584 MODULE_LICENSE("GPL");
2585 MODULE_FIRMWARE("edgeport/down3.bin");
2586 
2587 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2588 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2589 
2590 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2591 MODULE_PARM_DESC(ignore_cpu_rev,
2592                         "Ignore the cpu revision when connecting to a device");
2593 
2594 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
2595 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
2596 

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