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sky2: remove unneede workaround
[linux-2.6/mini2440.git] / drivers / usb / serial / io_ti.c
blobc3cdd00ddc41c1c48949ac1674a1dbcd5d9497a8
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 * Version history:
20 *
21 * July 11, 2002 Removed 4 port device structure since all TI UMP
22 * chips have only 2 ports
23 * David Iacovelli (davidi@ionetworks.com)
24 *
25 */
26
27 #include <linux/kernel.h>
28 #include <linux/jiffies.h>
29 #include <linux/errno.h>
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/tty.h>
33 #include <linux/tty_driver.h>
34 #include <linux/tty_flip.h>
35 #include <linux/module.h>
36 #include <linux/spinlock.h>
37 #include <linux/mutex.h>
38 #include <linux/serial.h>
39 #include <linux/ioctl.h>
40 #include <linux/firmware.h>
41 #include <linux/uaccess.h>
42 #include <linux/usb.h>
43 #include <linux/usb/serial.h>
44
45 #include "io_16654.h"
46 #include "io_usbvend.h"
47 #include "io_ti.h"
48
49 /*
50 * Version Information
51 */
52 #define DRIVER_VERSION "v0.7mode043006"
53 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
54 #define DRIVER_DESC "Edgeport USB Serial Driver"
55
56 #define EPROM_PAGE_SIZE 64
57
58
59 struct edgeport_uart_buf_desc {
60 __u32 count; /* Number of bytes currently in buffer */
61 };
62
63 /* different hardware types */
64 #define HARDWARE_TYPE_930 0
65 #define HARDWARE_TYPE_TIUMP 1
66
67 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
68 #define TI_MODE_CONFIGURING 0 /* Device has not entered start device */
69 #define TI_MODE_BOOT 1 /* Staying in boot mode */
70 #define TI_MODE_DOWNLOAD 2 /* Made it to download mode */
71 #define TI_MODE_TRANSITIONING 3 /* Currently in boot mode but
72 transitioning to download mode */
73
74 /* read urb state */
75 #define EDGE_READ_URB_RUNNING 0
76 #define EDGE_READ_URB_STOPPING 1
77 #define EDGE_READ_URB_STOPPED 2
78
79 #define EDGE_LOW_LATENCY 1
80 #define EDGE_CLOSING_WAIT 4000 /* in .01 sec */
81
82 #define EDGE_OUT_BUF_SIZE 1024
83
84
85 /* Product information read from the Edgeport */
86 struct product_info {
87 int TiMode; /* Current TI Mode */
88 __u8 hardware_type; /* Type of hardware */
89 } __attribute__((packed));
90
91 /* circular buffer */
92 struct edge_buf {
93 unsigned int buf_size;
94 char *buf_buf;
95 char *buf_get;
96 char *buf_put;
97 };
98
99 struct edgeport_port {
100 __u16 uart_base;
101 __u16 dma_address;
102 __u8 shadow_msr;
103 __u8 shadow_mcr;
104 __u8 shadow_lsr;
105 __u8 lsr_mask;
106 __u32 ump_read_timeout; /* Number of miliseconds the UMP will
107 wait without data before completing
108 a read short */
109 int baud_rate;
110 int close_pending;
111 int lsr_event;
112 struct edgeport_uart_buf_desc tx;
113 struct async_icount icount;
114 wait_queue_head_t delta_msr_wait; /* for handling sleeping while
115 waiting for msr change to
116 happen */
117 struct edgeport_serial *edge_serial;
118 struct usb_serial_port *port;
119 __u8 bUartMode; /* Port type, 0: RS232, etc. */
120 spinlock_t ep_lock;
121 int ep_read_urb_state;
122 int ep_write_urb_in_use;
123 struct edge_buf *ep_out_buf;
124 };
125
126 struct edgeport_serial {
127 struct product_info product_info;
128 u8 TI_I2C_Type; /* Type of I2C in UMP */
129 u8 TiReadI2C; /* Set to TRUE if we have read the
130 I2c in Boot Mode */
131 struct mutex es_lock;
132 int num_ports_open;
133 struct usb_serial *serial;
134 };
135
136
137 /* Devices that this driver supports */
138 static struct usb_device_id edgeport_1port_id_table [] = {
139 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
140 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
141 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
142 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
143 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
144 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
145 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
146 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
147 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
148 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
149 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
150 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
151 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
152 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
153 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
154 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
155 { }
156 };
157
158 static struct usb_device_id edgeport_2port_id_table [] = {
159 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
160 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
161 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
162 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
163 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
164 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
165 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
166 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
167 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
168 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
169 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
170 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
171 /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
172 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
173 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
174 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
175 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
176 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
177 { }
178 };
179
180 /* Devices that this driver supports */
181 static struct usb_device_id id_table_combined [] = {
182 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
183 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
184 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
185 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
186 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
187 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
188 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
189 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
190 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
191 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
192 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
193 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
194 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
195 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
196 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
197 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
198 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
199 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
200 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
201 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
202 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
203 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
204 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
205 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
206 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
207 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
208 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
209 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
210 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
211 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
212 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
213 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
214 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
215 { }
216 };
217
218 MODULE_DEVICE_TABLE(usb, id_table_combined);
219
220 static struct usb_driver io_driver = {
221 .name = "io_ti",
222 .probe = usb_serial_probe,
223 .disconnect = usb_serial_disconnect,
224 .id_table = id_table_combined,
225 .no_dynamic_id = 1,
226 };
227
228
229 static unsigned char OperationalMajorVersion;
230 static unsigned char OperationalMinorVersion;
231 static unsigned short OperationalBuildNumber;
232
233 static int debug;
234
235 static int low_latency = EDGE_LOW_LATENCY;
236 static int closing_wait = EDGE_CLOSING_WAIT;
237 static int ignore_cpu_rev;
238 static int default_uart_mode; /* RS232 */
239
240 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
241 unsigned char *data, int length);
242
243 static void stop_read(struct edgeport_port *edge_port);
244 static int restart_read(struct edgeport_port *edge_port);
245
246 static void edge_set_termios(struct tty_struct *tty,
247 struct usb_serial_port *port, struct ktermios *old_termios);
248 static void edge_send(struct tty_struct *tty);
249
250 /* sysfs attributes */
251 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
252 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
253
254 /* circular buffer */
255 static struct edge_buf *edge_buf_alloc(unsigned int size);
256 static void edge_buf_free(struct edge_buf *eb);
257 static void edge_buf_clear(struct edge_buf *eb);
258 static unsigned int edge_buf_data_avail(struct edge_buf *eb);
259 static unsigned int edge_buf_space_avail(struct edge_buf *eb);
260 static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
261 unsigned int count);
262 static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
263 unsigned int count);
264
265
266 static int ti_vread_sync(struct usb_device *dev, __u8 request,
267 __u16 value, __u16 index, u8 *data, int size)
268 {
269 int status;
270
271 status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
272 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
273 value, index, data, size, 1000);
274 if (status < 0)
275 return status;
276 if (status != size) {
277 dbg("%s - wanted to write %d, but only wrote %d",
278 __func__, size, status);
279 return -ECOMM;
280 }
281 return 0;
282 }
283
284 static int ti_vsend_sync(struct usb_device *dev, __u8 request,
285 __u16 value, __u16 index, u8 *data, int size)
286 {
287 int status;
288
289 status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
290 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
291 value, index, data, size, 1000);
292 if (status < 0)
293 return status;
294 if (status != size) {
295 dbg("%s - wanted to write %d, but only wrote %d",
296 __func__, size, status);
297 return -ECOMM;
298 }
299 return 0;
300 }
301
302 static int send_cmd(struct usb_device *dev, __u8 command,
303 __u8 moduleid, __u16 value, u8 *data,
304 int size)
305 {
306 return ti_vsend_sync(dev, command, value, moduleid, data, size);
307 }
308
309 /* clear tx/rx buffers and fifo in TI UMP */
310 static int purge_port(struct usb_serial_port *port, __u16 mask)
311 {
312 int port_number = port->number - port->serial->minor;
313
314 dbg("%s - port %d, mask %x", __func__, port_number, mask);
315
316 return send_cmd(port->serial->dev,
317 UMPC_PURGE_PORT,
318 (__u8)(UMPM_UART1_PORT + port_number),
319 mask,
320 NULL,
321 0);
322 }
323
324 /**
325 * read_download_mem - Read edgeport memory from TI chip
326 * @dev: usb device pointer
327 * @start_address: Device CPU address at which to read
328 * @length: Length of above data
329 * @address_type: Can read both XDATA and I2C
330 * @buffer: pointer to input data buffer
331 */
332 static int read_download_mem(struct usb_device *dev, int start_address,
333 int length, __u8 address_type, __u8 *buffer)
334 {
335 int status = 0;
336 __u8 read_length;
337 __be16 be_start_address;
338
339 dbg("%s - @ %x for %d", __func__, start_address, length);
340
341 /* Read in blocks of 64 bytes
342 * (TI firmware can't handle more than 64 byte reads)
343 */
344 while (length) {
345 if (length > 64)
346 read_length = 64;
347 else
348 read_length = (__u8)length;
349
350 if (read_length > 1) {
351 dbg("%s - @ %x for %d", __func__,
352 start_address, read_length);
353 }
354 be_start_address = cpu_to_be16(start_address);
355 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
356 (__u16)address_type,
357 (__force __u16)be_start_address,
358 buffer, read_length);
359
360 if (status) {
361 dbg("%s - ERROR %x", __func__, status);
362 return status;
363 }
364
365 if (read_length > 1)
366 usb_serial_debug_data(debug, &dev->dev, __func__,
367 read_length, buffer);
368
369 /* Update pointers/length */
370 start_address += read_length;
371 buffer += read_length;
372 length -= read_length;
373 }
374
375 return status;
376 }
377
378 static int read_ram(struct usb_device *dev, int start_address,
379 int length, __u8 *buffer)
380 {
381 return read_download_mem(dev, start_address, length,
382 DTK_ADDR_SPACE_XDATA, buffer);
383 }
384
385 /* Read edgeport memory to a given block */
386 static int read_boot_mem(struct edgeport_serial *serial,
387 int start_address, int length, __u8 *buffer)
388 {
389 int status = 0;
390 int i;
391
392 for (i = 0; i < length; i++) {
393 status = ti_vread_sync(serial->serial->dev,
394 UMPC_MEMORY_READ, serial->TI_I2C_Type,
395 (__u16)(start_address+i), &buffer[i], 0x01);
396 if (status) {
397 dbg("%s - ERROR %x", __func__, status);
398 return status;
399 }
400 }
401
402 dbg("%s - start_address = %x, length = %d",
403 __func__, start_address, length);
404 usb_serial_debug_data(debug, &serial->serial->dev->dev,
405 __func__, length, buffer);
406
407 serial->TiReadI2C = 1;
408
409 return status;
410 }
411
412 /* Write given block to TI EPROM memory */
413 static int write_boot_mem(struct edgeport_serial *serial,
414 int start_address, int length, __u8 *buffer)
415 {
416 int status = 0;
417 int i;
418 __u8 temp;
419
420 /* Must do a read before write */
421 if (!serial->TiReadI2C) {
422 status = read_boot_mem(serial, 0, 1, &temp);
423 if (status)
424 return status;
425 }
426
427 for (i = 0; i < length; ++i) {
428 status = ti_vsend_sync(serial->serial->dev,
429 UMPC_MEMORY_WRITE, buffer[i],
430 (__u16)(i + start_address), NULL, 0);
431 if (status)
432 return status;
433 }
434
435 dbg("%s - start_sddr = %x, length = %d",
436 __func__, start_address, length);
437 usb_serial_debug_data(debug, &serial->serial->dev->dev,
438 __func__, length, buffer);
439
440 return status;
441 }
442
443
444 /* Write edgeport I2C memory to TI chip */
445 static int write_i2c_mem(struct edgeport_serial *serial,
446 int start_address, int length, __u8 address_type, __u8 *buffer)
447 {
448 int status = 0;
449 int write_length;
450 __be16 be_start_address;
451
452 /* We can only send a maximum of 1 aligned byte page at a time */
453
454 /* calulate the number of bytes left in the first page */
455 write_length = EPROM_PAGE_SIZE -
456 (start_address & (EPROM_PAGE_SIZE - 1));
457
458 if (write_length > length)
459 write_length = length;
460
461 dbg("%s - BytesInFirstPage Addr = %x, length = %d",
462 __func__, start_address, write_length);
463 usb_serial_debug_data(debug, &serial->serial->dev->dev,
464 __func__, write_length, buffer);
465
466 /* Write first page */
467 be_start_address = cpu_to_be16(start_address);
468 status = ti_vsend_sync(serial->serial->dev,
469 UMPC_MEMORY_WRITE, (__u16)address_type,
470 (__force __u16)be_start_address,
471 buffer, write_length);
472 if (status) {
473 dbg("%s - ERROR %d", __func__, status);
474 return status;
475 }
476
477 length -= write_length;
478 start_address += write_length;
479 buffer += write_length;
480
481 /* We should be aligned now -- can write
482 max page size bytes at a time */
483 while (length) {
484 if (length > EPROM_PAGE_SIZE)
485 write_length = EPROM_PAGE_SIZE;
486 else
487 write_length = length;
488
489 dbg("%s - Page Write Addr = %x, length = %d",
490 __func__, start_address, write_length);
491 usb_serial_debug_data(debug, &serial->serial->dev->dev,
492 __func__, write_length, buffer);
493
494 /* Write next page */
495 be_start_address = cpu_to_be16(start_address);
496 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
497 (__u16)address_type,
498 (__force __u16)be_start_address,
499 buffer, write_length);
500 if (status) {
501 dev_err(&serial->serial->dev->dev, "%s - ERROR %d\n",
502 __func__, status);
503 return status;
504 }
505
506 length -= write_length;
507 start_address += write_length;
508 buffer += write_length;
509 }
510 return status;
511 }
512
513 /* Examine the UMP DMA registers and LSR
514 *
515 * Check the MSBit of the X and Y DMA byte count registers.
516 * A zero in this bit indicates that the TX DMA buffers are empty
517 * then check the TX Empty bit in the UART.
518 */
519 static int tx_active(struct edgeport_port *port)
520 {
521 int status;
522 struct out_endpoint_desc_block *oedb;
523 __u8 *lsr;
524 int bytes_left = 0;
525
526 oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
527 if (!oedb) {
528 dev_err(&port->port->dev, "%s - out of memory\n", __func__);
529 return -ENOMEM;
530 }
531
532 lsr = kmalloc(1, GFP_KERNEL); /* Sigh, that's right, just one byte,
533 as not all platforms can do DMA
534 from stack */
535 if (!lsr) {
536 kfree(oedb);
537 return -ENOMEM;
538 }
539 /* Read the DMA Count Registers */
540 status = read_ram(port->port->serial->dev, port->dma_address,
541 sizeof(*oedb), (void *)oedb);
542 if (status)
543 goto exit_is_tx_active;
544
545 dbg("%s - XByteCount 0x%X", __func__, oedb->XByteCount);
546
547 /* and the LSR */
548 status = read_ram(port->port->serial->dev,
549 port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
550
551 if (status)
552 goto exit_is_tx_active;
553 dbg("%s - LSR = 0x%X", __func__, *lsr);
554
555 /* If either buffer has data or we are transmitting then return TRUE */
556 if ((oedb->XByteCount & 0x80) != 0)
557 bytes_left += 64;
558
559 if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
560 bytes_left += 1;
561
562 /* We return Not Active if we get any kind of error */
563 exit_is_tx_active:
564 dbg("%s - return %d", __func__, bytes_left);
565
566 kfree(lsr);
567 kfree(oedb);
568 return bytes_left;
569 }
570
571 static void chase_port(struct edgeport_port *port, unsigned long timeout,
572 int flush)
573 {
574 int baud_rate;
575 struct tty_struct *tty = tty_port_tty_get(&port->port->port);
576 wait_queue_t wait;
577 unsigned long flags;
578
579 if (!timeout)
580 timeout = (HZ * EDGE_CLOSING_WAIT)/100;
581
582 /* wait for data to drain from the buffer */
583 spin_lock_irqsave(&port->ep_lock, flags);
584 init_waitqueue_entry(&wait, current);
585 add_wait_queue(&tty->write_wait, &wait);
586 for (;;) {
587 set_current_state(TASK_INTERRUPTIBLE);
588 if (edge_buf_data_avail(port->ep_out_buf) == 0
589 || timeout == 0 || signal_pending(current)
590 || !usb_get_intfdata(port->port->serial->interface))
591 /* disconnect */
592 break;
593 spin_unlock_irqrestore(&port->ep_lock, flags);
594 timeout = schedule_timeout(timeout);
595 spin_lock_irqsave(&port->ep_lock, flags);
596 }
597 set_current_state(TASK_RUNNING);
598 remove_wait_queue(&tty->write_wait, &wait);
599 if (flush)
600 edge_buf_clear(port->ep_out_buf);
601 spin_unlock_irqrestore(&port->ep_lock, flags);
602 tty_kref_put(tty);
603
604 /* wait for data to drain from the device */
605 timeout += jiffies;
606 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
607 && usb_get_intfdata(port->port->serial->interface)) {
608 /* not disconnected */
609 if (!tx_active(port))
610 break;
611 msleep(10);
612 }
613
614 /* disconnected */
615 if (!usb_get_intfdata(port->port->serial->interface))
616 return;
617
618 /* wait one more character time, based on baud rate */
619 /* (tx_active doesn't seem to wait for the last byte) */
620 baud_rate = port->baud_rate;
621 if (baud_rate == 0)
622 baud_rate = 50;
623 msleep(max(1, DIV_ROUND_UP(10000, baud_rate)));
624 }
625
626 static int choose_config(struct usb_device *dev)
627 {
628 /*
629 * There may be multiple configurations on this device, in which case
630 * we would need to read and parse all of them to find out which one
631 * we want. However, we just support one config at this point,
632 * configuration # 1, which is Config Descriptor 0.
633 */
634
635 dbg("%s - Number of Interfaces = %d",
636 __func__, dev->config->desc.bNumInterfaces);
637 dbg("%s - MAX Power = %d",
638 __func__, dev->config->desc.bMaxPower * 2);
639
640 if (dev->config->desc.bNumInterfaces != 1) {
641 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n",
642 __func__);
643 return -ENODEV;
644 }
645
646 return 0;
647 }
648
649 static int read_rom(struct edgeport_serial *serial,
650 int start_address, int length, __u8 *buffer)
651 {
652 int status;
653
654 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
655 status = read_download_mem(serial->serial->dev,
656 start_address,
657 length,
658 serial->TI_I2C_Type,
659 buffer);
660 } else {
661 status = read_boot_mem(serial, start_address, length,
662 buffer);
663 }
664 return status;
665 }
666
667 static int write_rom(struct edgeport_serial *serial, int start_address,
668 int length, __u8 *buffer)
669 {
670 if (serial->product_info.TiMode == TI_MODE_BOOT)
671 return write_boot_mem(serial, start_address, length,
672 buffer);
673
674 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
675 return write_i2c_mem(serial, start_address, length,
676 serial->TI_I2C_Type, buffer);
677 return -EINVAL;
678 }
679
680
681
682 /* Read a descriptor header from I2C based on type */
683 static int get_descriptor_addr(struct edgeport_serial *serial,
684 int desc_type, struct ti_i2c_desc *rom_desc)
685 {
686 int start_address;
687 int status;
688
689 /* Search for requested descriptor in I2C */
690 start_address = 2;
691 do {
692 status = read_rom(serial,
693 start_address,
694 sizeof(struct ti_i2c_desc),
695 (__u8 *)rom_desc);
696 if (status)
697 return 0;
698
699 if (rom_desc->Type == desc_type)
700 return start_address;
701
702 start_address = start_address + sizeof(struct ti_i2c_desc)
703 + rom_desc->Size;
704
705 } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
706
707 return 0;
708 }
709
710 /* Validate descriptor checksum */
711 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
712 {
713 __u16 i;
714 __u8 cs = 0;
715
716 for (i = 0; i < rom_desc->Size; i++)
717 cs = (__u8)(cs + buffer[i]);
718
719 if (cs != rom_desc->CheckSum) {
720 dbg("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
721 return -EINVAL;
722 }
723 return 0;
724 }
725
726 /* Make sure that the I2C image is good */
727 static int check_i2c_image(struct edgeport_serial *serial)
728 {
729 struct device *dev = &serial->serial->dev->dev;
730 int status = 0;
731 struct ti_i2c_desc *rom_desc;
732 int start_address = 2;
733 __u8 *buffer;
734 __u16 ttype;
735
736 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
737 if (!rom_desc) {
738 dev_err(dev, "%s - out of memory\n", __func__);
739 return -ENOMEM;
740 }
741 buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
742 if (!buffer) {
743 dev_err(dev, "%s - out of memory when allocating buffer\n",
744 __func__);
745 kfree(rom_desc);
746 return -ENOMEM;
747 }
748
749 /* Read the first byte (Signature0) must be 0x52 or 0x10 */
750 status = read_rom(serial, 0, 1, buffer);
751 if (status)
752 goto out;
753
754 if (*buffer != UMP5152 && *buffer != UMP3410) {
755 dev_err(dev, "%s - invalid buffer signature\n", __func__);
756 status = -ENODEV;
757 goto out;
758 }
759
760 do {
761 /* Validate the I2C */
762 status = read_rom(serial,
763 start_address,
764 sizeof(struct ti_i2c_desc),
765 (__u8 *)rom_desc);
766 if (status)
767 break;
768
769 if ((start_address + sizeof(struct ti_i2c_desc) +
770 rom_desc->Size) > TI_MAX_I2C_SIZE) {
771 status = -ENODEV;
772 dbg("%s - structure too big, erroring out.", __func__);
773 break;
774 }
775
776 dbg("%s Type = 0x%x", __func__, rom_desc->Type);
777
778 /* Skip type 2 record */
779 ttype = rom_desc->Type & 0x0f;
780 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
781 && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
782 /* Read the descriptor data */
783 status = read_rom(serial, start_address +
784 sizeof(struct ti_i2c_desc),
785 rom_desc->Size, buffer);
786 if (status)
787 break;
788
789 status = valid_csum(rom_desc, buffer);
790 if (status)
791 break;
792 }
793 start_address = start_address + sizeof(struct ti_i2c_desc) +
794 rom_desc->Size;
795
796 } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
797 (start_address < TI_MAX_I2C_SIZE));
798
799 if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
800 (start_address > TI_MAX_I2C_SIZE))
801 status = -ENODEV;
802
803 out:
804 kfree(buffer);
805 kfree(rom_desc);
806 return status;
807 }
808
809 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
810 {
811 int status;
812 int start_address;
813 struct ti_i2c_desc *rom_desc;
814 struct edge_ti_manuf_descriptor *desc;
815
816 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
817 if (!rom_desc) {
818 dev_err(&serial->serial->dev->dev, "%s - out of memory\n",
819 __func__);
820 return -ENOMEM;
821 }
822 start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
823 rom_desc);
824
825 if (!start_address) {
826 dbg("%s - Edge Descriptor not found in I2C", __func__);
827 status = -ENODEV;
828 goto exit;
829 }
830
831 /* Read the descriptor data */
832 status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
833 rom_desc->Size, buffer);
834 if (status)
835 goto exit;
836
837 status = valid_csum(rom_desc, buffer);
838
839 desc = (struct edge_ti_manuf_descriptor *)buffer;
840 dbg("%s - IonConfig 0x%x", __func__, desc->IonConfig);
841 dbg("%s - Version %d", __func__, desc->Version);
842 dbg("%s - Cpu/Board 0x%x", __func__, desc->CpuRev_BoardRev);
843 dbg("%s - NumPorts %d", __func__, desc->NumPorts);
844 dbg("%s - NumVirtualPorts %d", __func__, desc->NumVirtualPorts);
845 dbg("%s - TotalPorts %d", __func__, desc->TotalPorts);
846
847 exit:
848 kfree(rom_desc);
849 return status;
850 }
851
852 /* Build firmware header used for firmware update */
853 static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
854 {
855 __u8 *buffer;
856 int buffer_size;
857 int i;
858 int err;
859 __u8 cs = 0;
860 struct ti_i2c_desc *i2c_header;
861 struct ti_i2c_image_header *img_header;
862 struct ti_i2c_firmware_rec *firmware_rec;
863 const struct firmware *fw;
864 const char *fw_name = "edgeport/down3.bin";
865
866 /* In order to update the I2C firmware we must change the type 2 record
867 * to type 0xF2. This will force the UMP to come up in Boot Mode.
868 * Then while in boot mode, the driver will download the latest
869 * firmware (padded to 15.5k) into the UMP ram. And finally when the
870 * device comes back up in download mode the driver will cause the new
871 * firmware to be copied from the UMP Ram to I2C and the firmware will
872 * update the record type from 0xf2 to 0x02.
873 */
874
875 /* Allocate a 15.5k buffer + 2 bytes for version number
876 * (Firmware Record) */
877 buffer_size = (((1024 * 16) - 512 ) +
878 sizeof(struct ti_i2c_firmware_rec));
879
880 buffer = kmalloc(buffer_size, GFP_KERNEL);
881 if (!buffer) {
882 dev_err(dev, "%s - out of memory\n", __func__);
883 return -ENOMEM;
884 }
885
886 // Set entire image of 0xffs
887 memset(buffer, 0xff, buffer_size);
888
889 err = request_firmware(&fw, fw_name, dev);
890 if (err) {
891 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
892 fw_name, err);
893 kfree(buffer);
894 return err;
895 }
896
897 /* Save Download Version Number */
898 OperationalMajorVersion = fw->data[0];
899 OperationalMinorVersion = fw->data[1];
900 OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
901
902 /* Copy version number into firmware record */
903 firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
904
905 firmware_rec->Ver_Major = OperationalMajorVersion;
906 firmware_rec->Ver_Minor = OperationalMinorVersion;
907
908 /* Pointer to fw_down memory image */
909 img_header = (struct ti_i2c_image_header *)&fw->data[4];
910
911 memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
912 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
913 le16_to_cpu(img_header->Length));
914
915 release_firmware(fw);
916
917 for (i=0; i < buffer_size; i++) {
918 cs = (__u8)(cs + buffer[i]);
919 }
920
921 kfree(buffer);
922
923 /* Build new header */
924 i2c_header = (struct ti_i2c_desc *)header;
925 firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data;
926
927 i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK;
928 i2c_header->Size = (__u16)buffer_size;
929 i2c_header->CheckSum = cs;
930 firmware_rec->Ver_Major = OperationalMajorVersion;
931 firmware_rec->Ver_Minor = OperationalMinorVersion;
932
933 return 0;
934 }
935
936 /* Try to figure out what type of I2c we have */
937 static int i2c_type_bootmode(struct edgeport_serial *serial)
938 {
939 int status;
940 __u8 data;
941
942 /* Try to read type 2 */
943 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
944 DTK_ADDR_SPACE_I2C_TYPE_II, 0, &data, 0x01);
945 if (status)
946 dbg("%s - read 2 status error = %d", __func__, status);
947 else
948 dbg("%s - read 2 data = 0x%x", __func__, data);
949 if ((!status) && (data == UMP5152 || data == UMP3410)) {
950 dbg("%s - ROM_TYPE_II", __func__);
951 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
952 return 0;
953 }
954
955 /* Try to read type 3 */
956 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
957 DTK_ADDR_SPACE_I2C_TYPE_III, 0, &data, 0x01);
958 if (status)
959 dbg("%s - read 3 status error = %d", __func__, status);
960 else
961 dbg("%s - read 2 data = 0x%x", __func__, data);
962 if ((!status) && (data == UMP5152 || data == UMP3410)) {
963 dbg("%s - ROM_TYPE_III", __func__);
964 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
965 return 0;
966 }
967
968 dbg("%s - Unknown", __func__);
969 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
970 return -ENODEV;
971 }
972
973 static int bulk_xfer(struct usb_serial *serial, void *buffer,
974 int length, int *num_sent)
975 {
976 int status;
977
978 status = usb_bulk_msg(serial->dev,
979 usb_sndbulkpipe(serial->dev,
980 serial->port[0]->bulk_out_endpointAddress),
981 buffer, length, num_sent, 1000);
982 return status;
983 }
984
985 /* Download given firmware image to the device (IN BOOT MODE) */
986 static int download_code(struct edgeport_serial *serial, __u8 *image,
987 int image_length)
988 {
989 int status = 0;
990 int pos;
991 int transfer;
992 int done;
993
994 /* Transfer firmware image */
995 for (pos = 0; pos < image_length; ) {
996 /* Read the next buffer from file */
997 transfer = image_length - pos;
998 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
999 transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
1000
1001 /* Transfer data */
1002 status = bulk_xfer(serial->serial, &image[pos],
1003 transfer, &done);
1004 if (status)
1005 break;
1006 /* Advance buffer pointer */
1007 pos += done;
1008 }
1009
1010 return status;
1011 }
1012
1013 /* FIXME!!! */
1014 static int config_boot_dev(struct usb_device *dev)
1015 {
1016 return 0;
1017 }
1018
1019 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
1020 {
1021 return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
1022 }
1023
1024 /**
1025 * DownloadTIFirmware - Download run-time operating firmware to the TI5052
1026 *
1027 * This routine downloads the main operating code into the TI5052, using the
1028 * boot code already burned into E2PROM or ROM.
1029 */
1030 static int download_fw(struct edgeport_serial *serial)
1031 {
1032 struct device *dev = &serial->serial->dev->dev;
1033 int status = 0;
1034 int start_address;
1035 struct edge_ti_manuf_descriptor *ti_manuf_desc;
1036 struct usb_interface_descriptor *interface;
1037 int download_cur_ver;
1038 int download_new_ver;
1039
1040 /* This routine is entered by both the BOOT mode and the Download mode
1041 * We can determine which code is running by the reading the config
1042 * descriptor and if we have only one bulk pipe it is in boot mode
1043 */
1044 serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1045
1046 /* Default to type 2 i2c */
1047 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1048
1049 status = choose_config(serial->serial->dev);
1050 if (status)
1051 return status;
1052
1053 interface = &serial->serial->interface->cur_altsetting->desc;
1054 if (!interface) {
1055 dev_err(dev, "%s - no interface set, error!\n", __func__);
1056 return -ENODEV;
1057 }
1058
1059 /*
1060 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1061 * if we have more than one endpoint we are definitely in download
1062 * mode
1063 */
1064 if (interface->bNumEndpoints > 1)
1065 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1066 else
1067 /* Otherwise we will remain in configuring mode */
1068 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1069
1070 /********************************************************************/
1071 /* Download Mode */
1072 /********************************************************************/
1073 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
1074 struct ti_i2c_desc *rom_desc;
1075
1076 dbg("%s - RUNNING IN DOWNLOAD MODE", __func__);
1077
1078 status = check_i2c_image(serial);
1079 if (status) {
1080 dbg("%s - DOWNLOAD MODE -- BAD I2C", __func__);
1081 return status;
1082 }
1083
1084 /* Validate Hardware version number
1085 * Read Manufacturing Descriptor from TI Based Edgeport
1086 */
1087 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1088 if (!ti_manuf_desc) {
1089 dev_err(dev, "%s - out of memory.\n", __func__);
1090 return -ENOMEM;
1091 }
1092 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1093 if (status) {
1094 kfree(ti_manuf_desc);
1095 return status;
1096 }
1097
1098 /* Check version number of ION descriptor */
1099 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1100 dbg("%s - Wrong CPU Rev %d (Must be 2)",
1101 __func__, ti_cpu_rev(ti_manuf_desc));
1102 kfree(ti_manuf_desc);
1103 return -EINVAL;
1104 }
1105
1106 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1107 if (!rom_desc) {
1108 dev_err(dev, "%s - out of memory.\n", __func__);
1109 kfree(ti_manuf_desc);
1110 return -ENOMEM;
1111 }
1112
1113 /* Search for type 2 record (firmware record) */
1114 start_address = get_descriptor_addr(serial,
1115 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1116 if (start_address != 0) {
1117 struct ti_i2c_firmware_rec *firmware_version;
1118 __u8 record;
1119
1120 dbg("%s - Found Type FIRMWARE (Type 2) record",
1121 __func__);
1122
1123 firmware_version = kmalloc(sizeof(*firmware_version),
1124 GFP_KERNEL);
1125 if (!firmware_version) {
1126 dev_err(dev, "%s - out of memory.\n", __func__);
1127 kfree(rom_desc);
1128 kfree(ti_manuf_desc);
1129 return -ENOMEM;
1130 }
1131
1132 /* Validate version number
1133 * Read the descriptor data
1134 */
1135 status = read_rom(serial, start_address +
1136 sizeof(struct ti_i2c_desc),
1137 sizeof(struct ti_i2c_firmware_rec),
1138 (__u8 *)firmware_version);
1139 if (status) {
1140 kfree(firmware_version);
1141 kfree(rom_desc);
1142 kfree(ti_manuf_desc);
1143 return status;
1144 }
1145
1146 /* Check version number of download with current
1147 version in I2c */
1148 download_cur_ver = (firmware_version->Ver_Major << 8) +
1149 (firmware_version->Ver_Minor);
1150 download_new_ver = (OperationalMajorVersion << 8) +
1151 (OperationalMinorVersion);
1152
1153 dbg("%s - >> FW Versions Device %d.%d Driver %d.%d",
1154 __func__,
1155 firmware_version->Ver_Major,
1156 firmware_version->Ver_Minor,
1157 OperationalMajorVersion,
1158 OperationalMinorVersion);
1159
1160 /* Check if we have an old version in the I2C and
1161 update if necessary */
1162 if (download_cur_ver != download_new_ver) {
1163 dbg("%s - Update I2C dld from %d.%d to %d.%d",
1164 __func__,
1165 firmware_version->Ver_Major,
1166 firmware_version->Ver_Minor,
1167 OperationalMajorVersion,
1168 OperationalMinorVersion);
1169
1170 /* In order to update the I2C firmware we must
1171 * change the type 2 record to type 0xF2. This
1172 * will force the UMP to come up in Boot Mode.
1173 * Then while in boot mode, the driver will
1174 * download the latest firmware (padded to
1175 * 15.5k) into the UMP ram. Finally when the
1176 * device comes back up in download mode the
1177 * driver will cause the new firmware to be
1178 * copied from the UMP Ram to I2C and the
1179 * firmware will update the record type from
1180 * 0xf2 to 0x02.
1181 */
1182 record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1183
1184 /* Change the I2C Firmware record type to
1185 0xf2 to trigger an update */
1186 status = write_rom(serial, start_address,
1187 sizeof(record), &record);
1188 if (status) {
1189 kfree(firmware_version);
1190 kfree(rom_desc);
1191 kfree(ti_manuf_desc);
1192 return status;
1193 }
1194
1195 /* verify the write -- must do this in order
1196 * for write to complete before we do the
1197 * hardware reset
1198 */
1199 status = read_rom(serial,
1200 start_address,
1201 sizeof(record),
1202 &record);
1203 if (status) {
1204 kfree(firmware_version);
1205 kfree(rom_desc);
1206 kfree(ti_manuf_desc);
1207 return status;
1208 }
1209
1210 if (record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1211 dev_err(dev,
1212 "%s - error resetting device\n",
1213 __func__);
1214 kfree(firmware_version);
1215 kfree(rom_desc);
1216 kfree(ti_manuf_desc);
1217 return -ENODEV;
1218 }
1219
1220 dbg("%s - HARDWARE RESET", __func__);
1221
1222 /* Reset UMP -- Back to BOOT MODE */
1223 status = ti_vsend_sync(serial->serial->dev,
1224 UMPC_HARDWARE_RESET,
1225 0, 0, NULL, 0);
1226
1227 dbg("%s - HARDWARE RESET return %d",
1228 __func__, status);
1229
1230 /* return an error on purpose. */
1231 kfree(firmware_version);
1232 kfree(rom_desc);
1233 kfree(ti_manuf_desc);
1234 return -ENODEV;
1235 }
1236 kfree(firmware_version);
1237 }
1238 /* Search for type 0xF2 record (firmware blank record) */
1239 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1240 #define HEADER_SIZE (sizeof(struct ti_i2c_desc) + \
1241 sizeof(struct ti_i2c_firmware_rec))
1242 __u8 *header;
1243 __u8 *vheader;
1244
1245 header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1246 if (!header) {
1247 dev_err(dev, "%s - out of memory.\n", __func__);
1248 kfree(rom_desc);
1249 kfree(ti_manuf_desc);
1250 return -ENOMEM;
1251 }
1252
1253 vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1254 if (!vheader) {
1255 dev_err(dev, "%s - out of memory.\n", __func__);
1256 kfree(header);
1257 kfree(rom_desc);
1258 kfree(ti_manuf_desc);
1259 return -ENOMEM;
1260 }
1261
1262 dbg("%s - Found Type BLANK FIRMWARE (Type F2) record",
1263 __func__);
1264
1265 /*
1266 * In order to update the I2C firmware we must change
1267 * the type 2 record to type 0xF2. This will force the
1268 * UMP to come up in Boot Mode. Then while in boot
1269 * mode, the driver will download the latest firmware
1270 * (padded to 15.5k) into the UMP ram. Finally when the
1271 * device comes back up in download mode the driver
1272 * will cause the new firmware to be copied from the
1273 * UMP Ram to I2C and the firmware will update the
1274 * record type from 0xf2 to 0x02.
1275 */
1276 status = build_i2c_fw_hdr(header, dev);
1277 if (status) {
1278 kfree(vheader);
1279 kfree(header);
1280 kfree(rom_desc);
1281 kfree(ti_manuf_desc);
1282 return status;
1283 }
1284
1285 /* Update I2C with type 0xf2 record with correct
1286 size and checksum */
1287 status = write_rom(serial,
1288 start_address,
1289 HEADER_SIZE,
1290 header);
1291 if (status) {
1292 kfree(vheader);
1293 kfree(header);
1294 kfree(rom_desc);
1295 kfree(ti_manuf_desc);
1296 return status;
1297 }
1298
1299 /* verify the write -- must do this in order for
1300 write to complete before we do the hardware reset */
1301 status = read_rom(serial, start_address,
1302 HEADER_SIZE, vheader);
1303
1304 if (status) {
1305 dbg("%s - can't read header back", __func__);
1306 kfree(vheader);
1307 kfree(header);
1308 kfree(rom_desc);
1309 kfree(ti_manuf_desc);
1310 return status;
1311 }
1312 if (memcmp(vheader, header, HEADER_SIZE)) {
1313 dbg("%s - write download record failed",
1314 __func__);
1315 kfree(vheader);
1316 kfree(header);
1317 kfree(rom_desc);
1318 kfree(ti_manuf_desc);
1319 return status;
1320 }
1321
1322 kfree(vheader);
1323 kfree(header);
1324
1325 dbg("%s - Start firmware update", __func__);
1326
1327 /* Tell firmware to copy download image into I2C */
1328 status = ti_vsend_sync(serial->serial->dev,
1329 UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0);
1330
1331 dbg("%s - Update complete 0x%x", __func__, status);
1332 if (status) {
1333 dev_err(dev,
1334 "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1335 __func__);
1336 kfree(rom_desc);
1337 kfree(ti_manuf_desc);
1338 return status;
1339 }
1340 }
1341
1342 // The device is running the download code
1343 kfree(rom_desc);
1344 kfree(ti_manuf_desc);
1345 return 0;
1346 }
1347
1348 /********************************************************************/
1349 /* Boot Mode */
1350 /********************************************************************/
1351 dbg("%s - RUNNING IN BOOT MODE", __func__);
1352
1353 /* Configure the TI device so we can use the BULK pipes for download */
1354 status = config_boot_dev(serial->serial->dev);
1355 if (status)
1356 return status;
1357
1358 if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1359 != USB_VENDOR_ID_ION) {
1360 dbg("%s - VID = 0x%x", __func__,
1361 le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1362 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1363 goto stayinbootmode;
1364 }
1365
1366 /* We have an ION device (I2c Must be programmed)
1367 Determine I2C image type */
1368 if (i2c_type_bootmode(serial))
1369 goto stayinbootmode;
1370
1371 /* Check for ION Vendor ID and that the I2C is valid */
1372 if (!check_i2c_image(serial)) {
1373 struct ti_i2c_image_header *header;
1374 int i;
1375 __u8 cs = 0;
1376 __u8 *buffer;
1377 int buffer_size;
1378 int err;
1379 const struct firmware *fw;
1380 const char *fw_name = "edgeport/down3.bin";
1381
1382 /* Validate Hardware version number
1383 * Read Manufacturing Descriptor from TI Based Edgeport
1384 */
1385 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1386 if (!ti_manuf_desc) {
1387 dev_err(dev, "%s - out of memory.\n", __func__);
1388 return -ENOMEM;
1389 }
1390 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1391 if (status) {
1392 kfree(ti_manuf_desc);
1393 goto stayinbootmode;
1394 }
1395
1396 /* Check for version 2 */
1397 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1398 dbg("%s - Wrong CPU Rev %d (Must be 2)",
1399 __func__, ti_cpu_rev(ti_manuf_desc));
1400 kfree(ti_manuf_desc);
1401 goto stayinbootmode;
1402 }
1403
1404 kfree(ti_manuf_desc);
1405
1406 /*
1407 * In order to update the I2C firmware we must change the type
1408 * 2 record to type 0xF2. This will force the UMP to come up
1409 * in Boot Mode. Then while in boot mode, the driver will
1410 * download the latest firmware (padded to 15.5k) into the
1411 * UMP ram. Finally when the device comes back up in download
1412 * mode the driver will cause the new firmware to be copied
1413 * from the UMP Ram to I2C and the firmware will update the
1414 * record type from 0xf2 to 0x02.
1415 *
1416 * Do we really have to copy the whole firmware image,
1417 * or could we do this in place!
1418 */
1419
1420 /* Allocate a 15.5k buffer + 3 byte header */
1421 buffer_size = (((1024 * 16) - 512) +
1422 sizeof(struct ti_i2c_image_header));
1423 buffer = kmalloc(buffer_size, GFP_KERNEL);
1424 if (!buffer) {
1425 dev_err(dev, "%s - out of memory\n", __func__);
1426 return -ENOMEM;
1427 }
1428
1429 /* Initialize the buffer to 0xff (pad the buffer) */
1430 memset(buffer, 0xff, buffer_size);
1431
1432 err = request_firmware(&fw, fw_name, dev);
1433 if (err) {
1434 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
1435 fw_name, err);
1436 kfree(buffer);
1437 return err;
1438 }
1439 memcpy(buffer, &fw->data[4], fw->size - 4);
1440 release_firmware(fw);
1441
1442 for (i = sizeof(struct ti_i2c_image_header);
1443 i < buffer_size; i++) {
1444 cs = (__u8)(cs + buffer[i]);
1445 }
1446
1447 header = (struct ti_i2c_image_header *)buffer;
1448
1449 /* update length and checksum after padding */
1450 header->Length = cpu_to_le16((__u16)(buffer_size -
1451 sizeof(struct ti_i2c_image_header)));
1452 header->CheckSum = cs;
1453
1454 /* Download the operational code */
1455 dbg("%s - Downloading operational code image (TI UMP)",
1456 __func__);
1457 status = download_code(serial, buffer, buffer_size);
1458
1459 kfree(buffer);
1460
1461 if (status) {
1462 dbg("%s - Error downloading operational code image",
1463 __func__);
1464 return status;
1465 }
1466
1467 /* Device will reboot */
1468 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1469
1470 dbg("%s - Download successful -- Device rebooting...",
1471 __func__);
1472
1473 /* return an error on purpose */
1474 return -ENODEV;
1475 }
1476
1477 stayinbootmode:
1478 /* Eprom is invalid or blank stay in boot mode */
1479 dbg("%s - STAYING IN BOOT MODE", __func__);
1480 serial->product_info.TiMode = TI_MODE_BOOT;
1481
1482 return 0;
1483 }
1484
1485
1486 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1487 {
1488 int port_number = port->port->number - port->port->serial->minor;
1489 on = !!on; /* 1 or 0 not bitmask */
1490 return send_cmd(port->port->serial->dev,
1491 feature, (__u8)(UMPM_UART1_PORT + port_number),
1492 on, NULL, 0);
1493 }
1494
1495
1496 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1497 {
1498 int status = 0;
1499
1500 dbg("%s - %x", __func__, mcr);
1501
1502 status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1503 if (status)
1504 return status;
1505 status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1506 if (status)
1507 return status;
1508 return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1509 }
1510
1511 /* Convert TI LSR to standard UART flags */
1512 static __u8 map_line_status(__u8 ti_lsr)
1513 {
1514 __u8 lsr = 0;
1515
1516 #define MAP_FLAG(flagUmp, flagUart) \
1517 if (ti_lsr & flagUmp) \
1518 lsr |= flagUart;
1519
1520 MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */
1521 MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */
1522 MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */
1523 MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */
1524 MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* rx data available */
1525 MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* tx hold reg empty */
1526
1527 #undef MAP_FLAG
1528
1529 return lsr;
1530 }
1531
1532 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1533 {
1534 struct async_icount *icount;
1535 struct tty_struct *tty;
1536
1537 dbg("%s - %02x", __func__, msr);
1538
1539 if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1540 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1541 icount = &edge_port->icount;
1542
1543 /* update input line counters */
1544 if (msr & EDGEPORT_MSR_DELTA_CTS)
1545 icount->cts++;
1546 if (msr & EDGEPORT_MSR_DELTA_DSR)
1547 icount->dsr++;
1548 if (msr & EDGEPORT_MSR_DELTA_CD)
1549 icount->dcd++;
1550 if (msr & EDGEPORT_MSR_DELTA_RI)
1551 icount->rng++;
1552 wake_up_interruptible(&edge_port->delta_msr_wait);
1553 }
1554
1555 /* Save the new modem status */
1556 edge_port->shadow_msr = msr & 0xf0;
1557
1558 tty = tty_port_tty_get(&edge_port->port->port);
1559 /* handle CTS flow control */
1560 if (tty && C_CRTSCTS(tty)) {
1561 if (msr & EDGEPORT_MSR_CTS) {
1562 tty->hw_stopped = 0;
1563 tty_wakeup(tty);
1564 } else {
1565 tty->hw_stopped = 1;
1566 }
1567 }
1568 tty_kref_put(tty);
1569
1570 return;
1571 }
1572
1573 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1574 __u8 lsr, __u8 data)
1575 {
1576 struct async_icount *icount;
1577 __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1578 LSR_FRM_ERR | LSR_BREAK));
1579 struct tty_struct *tty;
1580
1581 dbg("%s - %02x", __func__, new_lsr);
1582
1583 edge_port->shadow_lsr = lsr;
1584
1585 if (new_lsr & LSR_BREAK)
1586 /*
1587 * Parity and Framing errors only count if they
1588 * occur exclusive of a break being received.
1589 */
1590 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1591
1592 /* Place LSR data byte into Rx buffer */
1593 if (lsr_data) {
1594 tty = tty_port_tty_get(&edge_port->port->port);
1595 if (tty) {
1596 edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
1597 tty_kref_put(tty);
1598 }
1599 }
1600
1601 /* update input line counters */
1602 icount = &edge_port->icount;
1603 if (new_lsr & LSR_BREAK)
1604 icount->brk++;
1605 if (new_lsr & LSR_OVER_ERR)
1606 icount->overrun++;
1607 if (new_lsr & LSR_PAR_ERR)
1608 icount->parity++;
1609 if (new_lsr & LSR_FRM_ERR)
1610 icount->frame++;
1611 }
1612
1613
1614 static void edge_interrupt_callback(struct urb *urb)
1615 {
1616 struct edgeport_serial *edge_serial = urb->context;
1617 struct usb_serial_port *port;
1618 struct edgeport_port *edge_port;
1619 unsigned char *data = urb->transfer_buffer;
1620 int length = urb->actual_length;
1621 int port_number;
1622 int function;
1623 int retval;
1624 __u8 lsr;
1625 __u8 msr;
1626 int status = urb->status;
1627
1628 dbg("%s", __func__);
1629
1630 switch (status) {
1631 case 0:
1632 /* success */
1633 break;
1634 case -ECONNRESET:
1635 case -ENOENT:
1636 case -ESHUTDOWN:
1637 /* this urb is terminated, clean up */
1638 dbg("%s - urb shutting down with status: %d",
1639 __func__, status);
1640 return;
1641 default:
1642 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1643 "%d\n", __func__, status);
1644 goto exit;
1645 }
1646
1647 if (!length) {
1648 dbg("%s - no data in urb", __func__);
1649 goto exit;
1650 }
1651
1652 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
1653 __func__, length, data);
1654
1655 if (length != 2) {
1656 dbg("%s - expecting packet of size 2, got %d",
1657 __func__, length);
1658 goto exit;
1659 }
1660
1661 port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1662 function = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1663 dbg("%s - port_number %d, function %d, info 0x%x",
1664 __func__, port_number, function, data[1]);
1665 port = edge_serial->serial->port[port_number];
1666 edge_port = usb_get_serial_port_data(port);
1667 if (!edge_port) {
1668 dbg("%s - edge_port not found", __func__);
1669 return;
1670 }
1671 switch (function) {
1672 case TIUMP_INTERRUPT_CODE_LSR:
1673 lsr = map_line_status(data[1]);
1674 if (lsr & UMP_UART_LSR_DATA_MASK) {
1675 /* Save the LSR event for bulk read
1676 completion routine */
1677 dbg("%s - LSR Event Port %u LSR Status = %02x",
1678 __func__, port_number, lsr);
1679 edge_port->lsr_event = 1;
1680 edge_port->lsr_mask = lsr;
1681 } else {
1682 dbg("%s - ===== Port %d LSR Status = %02x ======",
1683 __func__, port_number, lsr);
1684 handle_new_lsr(edge_port, 0, lsr, 0);
1685 }
1686 break;
1687
1688 case TIUMP_INTERRUPT_CODE_MSR: /* MSR */
1689 /* Copy MSR from UMP */
1690 msr = data[1];
1691 dbg("%s - ===== Port %u MSR Status = %02x ======\n",
1692 __func__, port_number, msr);
1693 handle_new_msr(edge_port, msr);
1694 break;
1695
1696 default:
1697 dev_err(&urb->dev->dev,
1698 "%s - Unknown Interrupt code from UMP %x\n",
1699 __func__, data[1]);
1700 break;
1701
1702 }
1703
1704 exit:
1705 retval = usb_submit_urb(urb, GFP_ATOMIC);
1706 if (retval)
1707 dev_err(&urb->dev->dev,
1708 "%s - usb_submit_urb failed with result %d\n",
1709 __func__, retval);
1710 }
1711
1712 static void edge_bulk_in_callback(struct urb *urb)
1713 {
1714 struct edgeport_port *edge_port = urb->context;
1715 unsigned char *data = urb->transfer_buffer;
1716 struct tty_struct *tty;
1717 int retval = 0;
1718 int port_number;
1719 int status = urb->status;
1720
1721 dbg("%s", __func__);
1722
1723 switch (status) {
1724 case 0:
1725 /* success */
1726 break;
1727 case -ECONNRESET:
1728 case -ENOENT:
1729 case -ESHUTDOWN:
1730 /* this urb is terminated, clean up */
1731 dbg("%s - urb shutting down with status: %d",
1732 __func__, status);
1733 return;
1734 default:
1735 dev_err(&urb->dev->dev,
1736 "%s - nonzero read bulk status received: %d\n",
1737 __func__, status);
1738 }
1739
1740 if (status == -EPIPE)
1741 goto exit;
1742
1743 if (status) {
1744 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1745 return;
1746 }
1747
1748 port_number = edge_port->port->number - edge_port->port->serial->minor;
1749
1750 if (edge_port->lsr_event) {
1751 edge_port->lsr_event = 0;
1752 dbg("%s ===== Port %u LSR Status = %02x, Data = %02x ======",
1753 __func__, port_number, edge_port->lsr_mask, *data);
1754 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1755 /* Adjust buffer length/pointer */
1756 --urb->actual_length;
1757 ++data;
1758 }
1759
1760 tty = tty_port_tty_get(&edge_port->port->port);
1761 if (tty && urb->actual_length) {
1762 usb_serial_debug_data(debug, &edge_port->port->dev,
1763 __func__, urb->actual_length, data);
1764 if (edge_port->close_pending)
1765 dbg("%s - close pending, dropping data on the floor",
1766 __func__);
1767 else
1768 edge_tty_recv(&edge_port->port->dev, tty, data,
1769 urb->actual_length);
1770 edge_port->icount.rx += urb->actual_length;
1771 }
1772 tty_kref_put(tty);
1773
1774 exit:
1775 /* continue read unless stopped */
1776 spin_lock(&edge_port->ep_lock);
1777 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) {
1778 urb->dev = edge_port->port->serial->dev;
1779 retval = usb_submit_urb(urb, GFP_ATOMIC);
1780 } else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) {
1781 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1782 }
1783 spin_unlock(&edge_port->ep_lock);
1784 if (retval)
1785 dev_err(&urb->dev->dev,
1786 "%s - usb_submit_urb failed with result %d\n",
1787 __func__, retval);
1788 }
1789
1790 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
1791 unsigned char *data, int length)
1792 {
1793 int queued;
1794
1795 tty_buffer_request_room(tty, length);
1796 queued = tty_insert_flip_string(tty, data, length);
1797 if (queued < length)
1798 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1799 __func__, length - queued);
1800 tty_flip_buffer_push(tty);
1801 }
1802
1803 static void edge_bulk_out_callback(struct urb *urb)
1804 {
1805 struct usb_serial_port *port = urb->context;
1806 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1807 int status = urb->status;
1808 struct tty_struct *tty;
1809
1810 dbg("%s - port %d", __func__, port->number);
1811
1812 edge_port->ep_write_urb_in_use = 0;
1813
1814 switch (status) {
1815 case 0:
1816 /* success */
1817 break;
1818 case -ECONNRESET:
1819 case -ENOENT:
1820 case -ESHUTDOWN:
1821 /* this urb is terminated, clean up */
1822 dbg("%s - urb shutting down with status: %d",
1823 __func__, status);
1824 return;
1825 default:
1826 dev_err(&urb->dev->dev, "%s - nonzero write bulk status "
1827 "received: %d\n", __func__, status);
1828 }
1829
1830 /* send any buffered data */
1831 tty = tty_port_tty_get(&port->port);
1832 edge_send(tty);
1833 tty_kref_put(tty);
1834 }
1835
1836 static int edge_open(struct tty_struct *tty,
1837 struct usb_serial_port *port, struct file *filp)
1838 {
1839 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1840 struct edgeport_serial *edge_serial;
1841 struct usb_device *dev;
1842 struct urb *urb;
1843 int port_number;
1844 int status;
1845 u16 open_settings;
1846 u8 transaction_timeout;
1847
1848 dbg("%s - port %d", __func__, port->number);
1849
1850 if (edge_port == NULL)
1851 return -ENODEV;
1852
1853 if (tty)
1854 tty->low_latency = low_latency;
1855
1856 port_number = port->number - port->serial->minor;
1857 switch (port_number) {
1858 case 0:
1859 edge_port->uart_base = UMPMEM_BASE_UART1;
1860 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
1861 break;
1862 case 1:
1863 edge_port->uart_base = UMPMEM_BASE_UART2;
1864 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
1865 break;
1866 default:
1867 dev_err(&port->dev, "Unknown port number!!!\n");
1868 return -ENODEV;
1869 }
1870
1871 dbg("%s - port_number = %d, uart_base = %04x, dma_address = %04x",
1872 __func__, port_number, edge_port->uart_base,
1873 edge_port->dma_address);
1874
1875 dev = port->serial->dev;
1876
1877 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1878 init_waitqueue_head(&edge_port->delta_msr_wait);
1879
1880 /* turn off loopback */
1881 status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1882 if (status) {
1883 dev_err(&port->dev,
1884 "%s - cannot send clear loopback command, %d\n",
1885 __func__, status);
1886 return status;
1887 }
1888
1889 /* set up the port settings */
1890 if (tty)
1891 edge_set_termios(tty, port, tty->termios);
1892
1893 /* open up the port */
1894
1895 /* milliseconds to timeout for DMA transfer */
1896 transaction_timeout = 2;
1897
1898 edge_port->ump_read_timeout =
1899 max(20, ((transaction_timeout * 3) / 2));
1900
1901 /* milliseconds to timeout for DMA transfer */
1902 open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1903 UMP_PIPE_TRANS_TIMEOUT_ENA |
1904 (transaction_timeout << 2));
1905
1906 dbg("%s - Sending UMPC_OPEN_PORT", __func__);
1907
1908 /* Tell TI to open and start the port */
1909 status = send_cmd(dev, UMPC_OPEN_PORT,
1910 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1911 if (status) {
1912 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1913 __func__, status);
1914 return status;
1915 }
1916
1917 /* Start the DMA? */
1918 status = send_cmd(dev, UMPC_START_PORT,
1919 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1920 if (status) {
1921 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1922 __func__, status);
1923 return status;
1924 }
1925
1926 /* Clear TX and RX buffers in UMP */
1927 status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1928 if (status) {
1929 dev_err(&port->dev,
1930 "%s - cannot send clear buffers command, %d\n",
1931 __func__, status);
1932 return status;
1933 }
1934
1935 /* Read Initial MSR */
1936 status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1937 (__u16)(UMPM_UART1_PORT + port_number),
1938 &edge_port->shadow_msr, 1);
1939 if (status) {
1940 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1941 __func__, status);
1942 return status;
1943 }
1944
1945 dbg("ShadowMSR 0x%X", edge_port->shadow_msr);
1946
1947 /* Set Initial MCR */
1948 edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1949 dbg("ShadowMCR 0x%X", edge_port->shadow_mcr);
1950
1951 edge_serial = edge_port->edge_serial;
1952 if (mutex_lock_interruptible(&edge_serial->es_lock))
1953 return -ERESTARTSYS;
1954 if (edge_serial->num_ports_open == 0) {
1955 /* we are the first port to open, post the interrupt urb */
1956 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1957 if (!urb) {
1958 dev_err(&port->dev,
1959 "%s - no interrupt urb present, exiting\n",
1960 __func__);
1961 status = -EINVAL;
1962 goto release_es_lock;
1963 }
1964 urb->complete = edge_interrupt_callback;
1965 urb->context = edge_serial;
1966 urb->dev = dev;
1967 status = usb_submit_urb(urb, GFP_KERNEL);
1968 if (status) {
1969 dev_err(&port->dev,
1970 "%s - usb_submit_urb failed with value %d\n",
1971 __func__, status);
1972 goto release_es_lock;
1973 }
1974 }
1975
1976 /*
1977 * reset the data toggle on the bulk endpoints to work around bug in
1978 * host controllers where things get out of sync some times
1979 */
1980 usb_clear_halt(dev, port->write_urb->pipe);
1981 usb_clear_halt(dev, port->read_urb->pipe);
1982
1983 /* start up our bulk read urb */
1984 urb = port->read_urb;
1985 if (!urb) {
1986 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1987 __func__);
1988 status = -EINVAL;
1989 goto unlink_int_urb;
1990 }
1991 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1992 urb->complete = edge_bulk_in_callback;
1993 urb->context = edge_port;
1994 urb->dev = dev;
1995 status = usb_submit_urb(urb, GFP_KERNEL);
1996 if (status) {
1997 dev_err(&port->dev,
1998 "%s - read bulk usb_submit_urb failed with value %d\n",
1999 __func__, status);
2000 goto unlink_int_urb;
2001 }
2002
2003 ++edge_serial->num_ports_open;
2004
2005 dbg("%s - exited", __func__);
2006
2007 goto release_es_lock;
2008
2009 unlink_int_urb:
2010 if (edge_port->edge_serial->num_ports_open == 0)
2011 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2012 release_es_lock:
2013 mutex_unlock(&edge_serial->es_lock);
2014 return status;
2015 }
2016
2017 static void edge_close(struct tty_struct *tty,
2018 struct usb_serial_port *port, struct file *filp)
2019 {
2020 struct edgeport_serial *edge_serial;
2021 struct edgeport_port *edge_port;
2022 int port_number;
2023 int status;
2024
2025 dbg("%s - port %d", __func__, port->number);
2026
2027 edge_serial = usb_get_serial_data(port->serial);
2028 edge_port = usb_get_serial_port_data(port);
2029 if (edge_serial == NULL || edge_port == NULL)
2030 return;
2031
2032 /* The bulkreadcompletion routine will check
2033 * this flag and dump add read data */
2034 edge_port->close_pending = 1;
2035
2036 /* chase the port close and flush */
2037 chase_port(edge_port, (HZ * closing_wait) / 100, 1);
2038
2039 usb_kill_urb(port->read_urb);
2040 usb_kill_urb(port->write_urb);
2041 edge_port->ep_write_urb_in_use = 0;
2042
2043 /* assuming we can still talk to the device,
2044 * send a close port command to it */
2045 dbg("%s - send umpc_close_port", __func__);
2046 port_number = port->number - port->serial->minor;
2047 status = send_cmd(port->serial->dev,
2048 UMPC_CLOSE_PORT,
2049 (__u8)(UMPM_UART1_PORT + port_number),
2050 0,
2051 NULL,
2052 0);
2053 mutex_lock(&edge_serial->es_lock);
2054 --edge_port->edge_serial->num_ports_open;
2055 if (edge_port->edge_serial->num_ports_open <= 0) {
2056 /* last port is now closed, let's shut down our interrupt urb */
2057 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2058 edge_port->edge_serial->num_ports_open = 0;
2059 }
2060 mutex_unlock(&edge_serial->es_lock);
2061 edge_port->close_pending = 0;
2062
2063 dbg("%s - exited", __func__);
2064 }
2065
2066 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
2067 const unsigned char *data, int count)
2068 {
2069 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2070 unsigned long flags;
2071
2072 dbg("%s - port %d", __func__, port->number);
2073
2074 if (count == 0) {
2075 dbg("%s - write request of 0 bytes", __func__);
2076 return 0;
2077 }
2078
2079 if (edge_port == NULL)
2080 return -ENODEV;
2081 if (edge_port->close_pending == 1)
2082 return -ENODEV;
2083
2084 spin_lock_irqsave(&edge_port->ep_lock, flags);
2085 count = edge_buf_put(edge_port->ep_out_buf, data, count);
2086 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2087
2088 edge_send(tty);
2089
2090 return count;
2091 }
2092
2093 static void edge_send(struct tty_struct *tty)
2094 {
2095 struct usb_serial_port *port = tty->driver_data;
2096 int count, result;
2097 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2098 unsigned long flags;
2099
2100
2101 dbg("%s - port %d", __func__, port->number);
2102
2103 spin_lock_irqsave(&edge_port->ep_lock, flags);
2104
2105 if (edge_port->ep_write_urb_in_use) {
2106 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2107 return;
2108 }
2109
2110 count = edge_buf_get(edge_port->ep_out_buf,
2111 port->write_urb->transfer_buffer,
2112 port->bulk_out_size);
2113
2114 if (count == 0) {
2115 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2116 return;
2117 }
2118
2119 edge_port->ep_write_urb_in_use = 1;
2120
2121 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2122
2123 usb_serial_debug_data(debug, &port->dev, __func__, count,
2124 port->write_urb->transfer_buffer);
2125
2126 /* set up our urb */
2127 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
2128 usb_sndbulkpipe(port->serial->dev,
2129 port->bulk_out_endpointAddress),
2130 port->write_urb->transfer_buffer, count,
2131 edge_bulk_out_callback,
2132 port);
2133
2134 /* send the data out the bulk port */
2135 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2136 if (result) {
2137 dev_err(&port->dev,
2138 "%s - failed submitting write urb, error %d\n",
2139 __func__, result);
2140 edge_port->ep_write_urb_in_use = 0;
2141 /* TODO: reschedule edge_send */
2142 } else
2143 edge_port->icount.tx += count;
2144
2145 /* wakeup any process waiting for writes to complete */
2146 /* there is now more room in the buffer for new writes */
2147 if (tty)
2148 tty_wakeup(tty);
2149 }
2150
2151 static int edge_write_room(struct tty_struct *tty)
2152 {
2153 struct usb_serial_port *port = tty->driver_data;
2154 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2155 int room = 0;
2156 unsigned long flags;
2157
2158 dbg("%s - port %d", __func__, port->number);
2159
2160 if (edge_port == NULL)
2161 return 0;
2162 if (edge_port->close_pending == 1)
2163 return 0;
2164
2165 spin_lock_irqsave(&edge_port->ep_lock, flags);
2166 room = edge_buf_space_avail(edge_port->ep_out_buf);
2167 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2168
2169 dbg("%s - returns %d", __func__, room);
2170 return room;
2171 }
2172
2173 static int edge_chars_in_buffer(struct tty_struct *tty)
2174 {
2175 struct usb_serial_port *port = tty->driver_data;
2176 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2177 int chars = 0;
2178 unsigned long flags;
2179
2180 dbg("%s - port %d", __func__, port->number);
2181
2182 if (edge_port == NULL)
2183 return 0;
2184 if (edge_port->close_pending == 1)
2185 return 0;
2186
2187 spin_lock_irqsave(&edge_port->ep_lock, flags);
2188 chars = edge_buf_data_avail(edge_port->ep_out_buf);
2189 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2190
2191 dbg("%s - returns %d", __func__, chars);
2192 return chars;
2193 }
2194
2195 static void edge_throttle(struct tty_struct *tty)
2196 {
2197 struct usb_serial_port *port = tty->driver_data;
2198 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2199 int status;
2200
2201 dbg("%s - port %d", __func__, port->number);
2202
2203 if (edge_port == NULL)
2204 return;
2205
2206 /* if we are implementing XON/XOFF, send the stop character */
2207 if (I_IXOFF(tty)) {
2208 unsigned char stop_char = STOP_CHAR(tty);
2209 status = edge_write(tty, port, &stop_char, 1);
2210 if (status <= 0) {
2211 dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2212 }
2213 }
2214
2215 /* if we are implementing RTS/CTS, stop reads */
2216 /* and the Edgeport will clear the RTS line */
2217 if (C_CRTSCTS(tty))
2218 stop_read(edge_port);
2219
2220 }
2221
2222 static void edge_unthrottle(struct tty_struct *tty)
2223 {
2224 struct usb_serial_port *port = tty->driver_data;
2225 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2226 int status;
2227
2228 dbg("%s - port %d", __func__, port->number);
2229
2230 if (edge_port == NULL)
2231 return;
2232
2233 /* if we are implementing XON/XOFF, send the start character */
2234 if (I_IXOFF(tty)) {
2235 unsigned char start_char = START_CHAR(tty);
2236 status = edge_write(tty, port, &start_char, 1);
2237 if (status <= 0) {
2238 dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2239 }
2240 }
2241 /* if we are implementing RTS/CTS, restart reads */
2242 /* are the Edgeport will assert the RTS line */
2243 if (C_CRTSCTS(tty)) {
2244 status = restart_read(edge_port);
2245 if (status)
2246 dev_err(&port->dev,
2247 "%s - read bulk usb_submit_urb failed: %d\n",
2248 __func__, status);
2249 }
2250
2251 }
2252
2253 static void stop_read(struct edgeport_port *edge_port)
2254 {
2255 unsigned long flags;
2256
2257 spin_lock_irqsave(&edge_port->ep_lock, flags);
2258
2259 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2260 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2261 edge_port->shadow_mcr &= ~MCR_RTS;
2262
2263 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2264 }
2265
2266 static int restart_read(struct edgeport_port *edge_port)
2267 {
2268 struct urb *urb;
2269 int status = 0;
2270 unsigned long flags;
2271
2272 spin_lock_irqsave(&edge_port->ep_lock, flags);
2273
2274 if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2275 urb = edge_port->port->read_urb;
2276 urb->complete = edge_bulk_in_callback;
2277 urb->context = edge_port;
2278 urb->dev = edge_port->port->serial->dev;
2279 status = usb_submit_urb(urb, GFP_ATOMIC);
2280 }
2281 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2282 edge_port->shadow_mcr |= MCR_RTS;
2283
2284 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2285
2286 return status;
2287 }
2288
2289 static void change_port_settings(struct tty_struct *tty,
2290 struct edgeport_port *edge_port, struct ktermios *old_termios)
2291 {
2292 struct ump_uart_config *config;
2293 int baud;
2294 unsigned cflag;
2295 int status;
2296 int port_number = edge_port->port->number -
2297 edge_port->port->serial->minor;
2298
2299 dbg("%s - port %d", __func__, edge_port->port->number);
2300
2301 config = kmalloc (sizeof (*config), GFP_KERNEL);
2302 if (!config) {
2303 *tty->termios = *old_termios;
2304 dev_err(&edge_port->port->dev, "%s - out of memory\n",
2305 __func__);
2306 return;
2307 }
2308
2309 cflag = tty->termios->c_cflag;
2310
2311 config->wFlags = 0;
2312
2313 /* These flags must be set */
2314 config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2315 config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2316 config->bUartMode = (__u8)(edge_port->bUartMode);
2317
2318 switch (cflag & CSIZE) {
2319 case CS5:
2320 config->bDataBits = UMP_UART_CHAR5BITS;
2321 dbg("%s - data bits = 5", __func__);
2322 break;
2323 case CS6:
2324 config->bDataBits = UMP_UART_CHAR6BITS;
2325 dbg("%s - data bits = 6", __func__);
2326 break;
2327 case CS7:
2328 config->bDataBits = UMP_UART_CHAR7BITS;
2329 dbg("%s - data bits = 7", __func__);
2330 break;
2331 default:
2332 case CS8:
2333 config->bDataBits = UMP_UART_CHAR8BITS;
2334 dbg("%s - data bits = 8", __func__);
2335 break;
2336 }
2337
2338 if (cflag & PARENB) {
2339 if (cflag & PARODD) {
2340 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2341 config->bParity = UMP_UART_ODDPARITY;
2342 dbg("%s - parity = odd", __func__);
2343 } else {
2344 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2345 config->bParity = UMP_UART_EVENPARITY;
2346 dbg("%s - parity = even", __func__);
2347 }
2348 } else {
2349 config->bParity = UMP_UART_NOPARITY;
2350 dbg("%s - parity = none", __func__);
2351 }
2352
2353 if (cflag & CSTOPB) {
2354 config->bStopBits = UMP_UART_STOPBIT2;
2355 dbg("%s - stop bits = 2", __func__);
2356 } else {
2357 config->bStopBits = UMP_UART_STOPBIT1;
2358 dbg("%s - stop bits = 1", __func__);
2359 }
2360
2361 /* figure out the flow control settings */
2362 if (cflag & CRTSCTS) {
2363 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2364 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2365 dbg("%s - RTS/CTS is enabled", __func__);
2366 } else {
2367 dbg("%s - RTS/CTS is disabled", __func__);
2368 tty->hw_stopped = 0;
2369 restart_read(edge_port);
2370 }
2371
2372 /* if we are implementing XON/XOFF, set the start and stop
2373 character in the device */
2374 config->cXon = START_CHAR(tty);
2375 config->cXoff = STOP_CHAR(tty);
2376
2377 /* if we are implementing INBOUND XON/XOFF */
2378 if (I_IXOFF(tty)) {
2379 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2380 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2381 __func__, config->cXon, config->cXoff);
2382 } else
2383 dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2384
2385 /* if we are implementing OUTBOUND XON/XOFF */
2386 if (I_IXON(tty)) {
2387 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2388 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2389 __func__, config->cXon, config->cXoff);
2390 } else
2391 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2392
2393 tty->termios->c_cflag &= ~CMSPAR;
2394
2395 /* Round the baud rate */
2396 baud = tty_get_baud_rate(tty);
2397 if (!baud) {
2398 /* pick a default, any default... */
2399 baud = 9600;
2400 } else
2401 tty_encode_baud_rate(tty, baud, baud);
2402
2403 edge_port->baud_rate = baud;
2404 config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2405
2406 /* FIXME: Recompute actual baud from divisor here */
2407
2408 dbg("%s - baud rate = %d, wBaudRate = %d", __func__, baud,
2409 config->wBaudRate);
2410
2411 dbg("wBaudRate: %d", (int)(461550L / config->wBaudRate));
2412 dbg("wFlags: 0x%x", config->wFlags);
2413 dbg("bDataBits: %d", config->bDataBits);
2414 dbg("bParity: %d", config->bParity);
2415 dbg("bStopBits: %d", config->bStopBits);
2416 dbg("cXon: %d", config->cXon);
2417 dbg("cXoff: %d", config->cXoff);
2418 dbg("bUartMode: %d", config->bUartMode);
2419
2420 /* move the word values into big endian mode */
2421 cpu_to_be16s(&config->wFlags);
2422 cpu_to_be16s(&config->wBaudRate);
2423
2424 status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2425 (__u8)(UMPM_UART1_PORT + port_number),
2426 0, (__u8 *)config, sizeof(*config));
2427 if (status)
2428 dbg("%s - error %d when trying to write config to device",
2429 __func__, status);
2430 kfree(config);
2431 return;
2432 }
2433
2434 static void edge_set_termios(struct tty_struct *tty,
2435 struct usb_serial_port *port, struct ktermios *old_termios)
2436 {
2437 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2438 unsigned int cflag;
2439
2440 cflag = tty->termios->c_cflag;
2441
2442 dbg("%s - clfag %08x iflag %08x", __func__,
2443 tty->termios->c_cflag, tty->termios->c_iflag);
2444 dbg("%s - old clfag %08x old iflag %08x", __func__,
2445 old_termios->c_cflag, old_termios->c_iflag);
2446 dbg("%s - port %d", __func__, port->number);
2447
2448 if (edge_port == NULL)
2449 return;
2450 /* change the port settings to the new ones specified */
2451 change_port_settings(tty, edge_port, old_termios);
2452 return;
2453 }
2454
2455 static int edge_tiocmset(struct tty_struct *tty, struct file *file,
2456 unsigned int set, unsigned int clear)
2457 {
2458 struct usb_serial_port *port = tty->driver_data;
2459 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2460 unsigned int mcr;
2461 unsigned long flags;
2462
2463 dbg("%s - port %d", __func__, port->number);
2464
2465 spin_lock_irqsave(&edge_port->ep_lock, flags);
2466 mcr = edge_port->shadow_mcr;
2467 if (set & TIOCM_RTS)
2468 mcr |= MCR_RTS;
2469 if (set & TIOCM_DTR)
2470 mcr |= MCR_DTR;
2471 if (set & TIOCM_LOOP)
2472 mcr |= MCR_LOOPBACK;
2473
2474 if (clear & TIOCM_RTS)
2475 mcr &= ~MCR_RTS;
2476 if (clear & TIOCM_DTR)
2477 mcr &= ~MCR_DTR;
2478 if (clear & TIOCM_LOOP)
2479 mcr &= ~MCR_LOOPBACK;
2480
2481 edge_port->shadow_mcr = mcr;
2482 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2483
2484 restore_mcr(edge_port, mcr);
2485 return 0;
2486 }
2487
2488 static int edge_tiocmget(struct tty_struct *tty, struct file *file)
2489 {
2490 struct usb_serial_port *port = tty->driver_data;
2491 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2492 unsigned int result = 0;
2493 unsigned int msr;
2494 unsigned int mcr;
2495 unsigned long flags;
2496
2497 dbg("%s - port %d", __func__, port->number);
2498
2499 spin_lock_irqsave(&edge_port->ep_lock, flags);
2500
2501 msr = edge_port->shadow_msr;
2502 mcr = edge_port->shadow_mcr;
2503 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
2504 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
2505 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
2506 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
2507 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
2508 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
2509
2510
2511 dbg("%s -- %x", __func__, result);
2512 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2513
2514 return result;
2515 }
2516
2517 static int get_serial_info(struct edgeport_port *edge_port,
2518 struct serial_struct __user *retinfo)
2519 {
2520 struct serial_struct tmp;
2521
2522 if (!retinfo)
2523 return -EFAULT;
2524
2525 memset(&tmp, 0, sizeof(tmp));
2526
2527 tmp.type = PORT_16550A;
2528 tmp.line = edge_port->port->serial->minor;
2529 tmp.port = edge_port->port->number;
2530 tmp.irq = 0;
2531 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2532 tmp.xmit_fifo_size = edge_port->port->bulk_out_size;
2533 tmp.baud_base = 9600;
2534 tmp.close_delay = 5*HZ;
2535 tmp.closing_wait = closing_wait;
2536
2537 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2538 return -EFAULT;
2539 return 0;
2540 }
2541
2542 static int edge_ioctl(struct tty_struct *tty, struct file *file,
2543 unsigned int cmd, unsigned long arg)
2544 {
2545 struct usb_serial_port *port = tty->driver_data;
2546 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2547 struct async_icount cnow;
2548 struct async_icount cprev;
2549
2550 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2551
2552 switch (cmd) {
2553 case TIOCGSERIAL:
2554 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
2555 return get_serial_info(edge_port,
2556 (struct serial_struct __user *) arg);
2557 case TIOCMIWAIT:
2558 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
2559 cprev = edge_port->icount;
2560 while (1) {
2561 interruptible_sleep_on(&edge_port->delta_msr_wait);
2562 /* see if a signal did it */
2563 if (signal_pending(current))
2564 return -ERESTARTSYS;
2565 cnow = edge_port->icount;
2566 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2567 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2568 return -EIO; /* no change => error */
2569 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2570 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2571 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2572 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2573 return 0;
2574 }
2575 cprev = cnow;
2576 }
2577 /* not reached */
2578 break;
2579 case TIOCGICOUNT:
2580 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2581 port->number, edge_port->icount.rx, edge_port->icount.tx);
2582 if (copy_to_user((void __user *)arg, &edge_port->icount,
2583 sizeof(edge_port->icount)))
2584 return -EFAULT;
2585 return 0;
2586 }
2587 return -ENOIOCTLCMD;
2588 }
2589
2590 static void edge_break(struct tty_struct *tty, int break_state)
2591 {
2592 struct usb_serial_port *port = tty->driver_data;
2593 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2594 int status;
2595 int bv = 0; /* Off */
2596
2597 dbg("%s - state = %d", __func__, break_state);
2598
2599 /* chase the port close */
2600 chase_port(edge_port, 0, 0);
2601
2602 if (break_state == -1)
2603 bv = 1; /* On */
2604 status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2605 if (status)
2606 dbg("%s - error %d sending break set/clear command.",
2607 __func__, status);
2608 }
2609
2610 static int edge_startup(struct usb_serial *serial)
2611 {
2612 struct edgeport_serial *edge_serial;
2613 struct edgeport_port *edge_port;
2614 struct usb_device *dev;
2615 int status;
2616 int i;
2617
2618 dev = serial->dev;
2619
2620 /* create our private serial structure */
2621 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2622 if (edge_serial == NULL) {
2623 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2624 return -ENOMEM;
2625 }
2626 mutex_init(&edge_serial->es_lock);
2627 edge_serial->serial = serial;
2628 usb_set_serial_data(serial, edge_serial);
2629
2630 status = download_fw(edge_serial);
2631 if (status) {
2632 kfree(edge_serial);
2633 return status;
2634 }
2635
2636 /* set up our port private structures */
2637 for (i = 0; i < serial->num_ports; ++i) {
2638 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
2639 if (edge_port == NULL) {
2640 dev_err(&serial->dev->dev, "%s - Out of memory\n",
2641 __func__);
2642 goto cleanup;
2643 }
2644 spin_lock_init(&edge_port->ep_lock);
2645 edge_port->ep_out_buf = edge_buf_alloc(EDGE_OUT_BUF_SIZE);
2646 if (edge_port->ep_out_buf == NULL) {
2647 dev_err(&serial->dev->dev, "%s - Out of memory\n",
2648 __func__);
2649 kfree(edge_port);
2650 goto cleanup;
2651 }
2652 edge_port->port = serial->port[i];
2653 edge_port->edge_serial = edge_serial;
2654 usb_set_serial_port_data(serial->port[i], edge_port);
2655 edge_port->bUartMode = default_uart_mode;
2656 }
2657
2658 return 0;
2659
2660 cleanup:
2661 for (--i; i >= 0; --i) {
2662 edge_port = usb_get_serial_port_data(serial->port[i]);
2663 edge_buf_free(edge_port->ep_out_buf);
2664 kfree(edge_port);
2665 usb_set_serial_port_data(serial->port[i], NULL);
2666 }
2667 kfree(edge_serial);
2668 usb_set_serial_data(serial, NULL);
2669 return -ENOMEM;
2670 }
2671
2672 static void edge_shutdown(struct usb_serial *serial)
2673 {
2674 int i;
2675 struct edgeport_port *edge_port;
2676
2677 dbg("%s", __func__);
2678
2679 for (i = 0; i < serial->num_ports; ++i) {
2680 edge_port = usb_get_serial_port_data(serial->port[i]);
2681 edge_remove_sysfs_attrs(edge_port->port);
2682 edge_buf_free(edge_port->ep_out_buf);
2683 kfree(edge_port);
2684 usb_set_serial_port_data(serial->port[i], NULL);
2685 }
2686 kfree(usb_get_serial_data(serial));
2687 usb_set_serial_data(serial, NULL);
2688 }
2689
2690
2691 /* Sysfs Attributes */
2692
2693 static ssize_t show_uart_mode(struct device *dev,
2694 struct device_attribute *attr, char *buf)
2695 {
2696 struct usb_serial_port *port = to_usb_serial_port(dev);
2697 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2698
2699 return sprintf(buf, "%d\n", edge_port->bUartMode);
2700 }
2701
2702 static ssize_t store_uart_mode(struct device *dev,
2703 struct device_attribute *attr, const char *valbuf, size_t count)
2704 {
2705 struct usb_serial_port *port = to_usb_serial_port(dev);
2706 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2707 unsigned int v = simple_strtoul(valbuf, NULL, 0);
2708
2709 dbg("%s: setting uart_mode = %d", __func__, v);
2710
2711 if (v < 256)
2712 edge_port->bUartMode = v;
2713 else
2714 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2715
2716 return count;
2717 }
2718
2719 static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode,
2720 store_uart_mode);
2721
2722 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2723 {
2724 return device_create_file(&port->dev, &dev_attr_uart_mode);
2725 }
2726
2727 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2728 {
2729 device_remove_file(&port->dev, &dev_attr_uart_mode);
2730 return 0;
2731 }
2732
2733
2734 /* Circular Buffer */
2735
2736 /*
2737 * edge_buf_alloc
2738 *
2739 * Allocate a circular buffer and all associated memory.
2740 */
2741
2742 static struct edge_buf *edge_buf_alloc(unsigned int size)
2743 {
2744 struct edge_buf *eb;
2745
2746
2747 if (size == 0)
2748 return NULL;
2749
2750 eb = kmalloc(sizeof(struct edge_buf), GFP_KERNEL);
2751 if (eb == NULL)
2752 return NULL;
2753
2754 eb->buf_buf = kmalloc(size, GFP_KERNEL);
2755 if (eb->buf_buf == NULL) {
2756 kfree(eb);
2757 return NULL;
2758 }
2759
2760 eb->buf_size = size;
2761 eb->buf_get = eb->buf_put = eb->buf_buf;
2762
2763 return eb;
2764 }
2765
2766
2767 /*
2768 * edge_buf_free
2769 *
2770 * Free the buffer and all associated memory.
2771 */
2772
2773 static void edge_buf_free(struct edge_buf *eb)
2774 {
2775 if (eb) {
2776 kfree(eb->buf_buf);
2777 kfree(eb);
2778 }
2779 }
2780
2781
2782 /*
2783 * edge_buf_clear
2784 *
2785 * Clear out all data in the circular buffer.
2786 */
2787
2788 static void edge_buf_clear(struct edge_buf *eb)
2789 {
2790 if (eb != NULL)
2791 eb->buf_get = eb->buf_put;
2792 /* equivalent to a get of all data available */
2793 }
2794
2795
2796 /*
2797 * edge_buf_data_avail
2798 *
2799 * Return the number of bytes of data available in the circular
2800 * buffer.
2801 */
2802
2803 static unsigned int edge_buf_data_avail(struct edge_buf *eb)
2804 {
2805 if (eb == NULL)
2806 return 0;
2807 return ((eb->buf_size + eb->buf_put - eb->buf_get) % eb->buf_size);
2808 }
2809
2810
2811 /*
2812 * edge_buf_space_avail
2813 *
2814 * Return the number of bytes of space available in the circular
2815 * buffer.
2816 */
2817
2818 static unsigned int edge_buf_space_avail(struct edge_buf *eb)
2819 {
2820 if (eb == NULL)
2821 return 0;
2822 return ((eb->buf_size + eb->buf_get - eb->buf_put - 1) % eb->buf_size);
2823 }
2824
2825
2826 /*
2827 * edge_buf_put
2828 *
2829 * Copy data data from a user buffer and put it into the circular buffer.
2830 * Restrict to the amount of space available.
2831 *
2832 * Return the number of bytes copied.
2833 */
2834
2835 static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
2836 unsigned int count)
2837 {
2838 unsigned int len;
2839
2840
2841 if (eb == NULL)
2842 return 0;
2843
2844 len = edge_buf_space_avail(eb);
2845 if (count > len)
2846 count = len;
2847
2848 if (count == 0)
2849 return 0;
2850
2851 len = eb->buf_buf + eb->buf_size - eb->buf_put;
2852 if (count > len) {
2853 memcpy(eb->buf_put, buf, len);
2854 memcpy(eb->buf_buf, buf+len, count - len);
2855 eb->buf_put = eb->buf_buf + count - len;
2856 } else {
2857 memcpy(eb->buf_put, buf, count);
2858 if (count < len)
2859 eb->buf_put += count;
2860 else /* count == len */
2861 eb->buf_put = eb->buf_buf;
2862 }
2863
2864 return count;
2865 }
2866
2867
2868 /*
2869 * edge_buf_get
2870 *
2871 * Get data from the circular buffer and copy to the given buffer.
2872 * Restrict to the amount of data available.
2873 *
2874 * Return the number of bytes copied.
2875 */
2876
2877 static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
2878 unsigned int count)
2879 {
2880 unsigned int len;
2881
2882
2883 if (eb == NULL)
2884 return 0;
2885
2886 len = edge_buf_data_avail(eb);
2887 if (count > len)
2888 count = len;
2889
2890 if (count == 0)
2891 return 0;
2892
2893 len = eb->buf_buf + eb->buf_size - eb->buf_get;
2894 if (count > len) {
2895 memcpy(buf, eb->buf_get, len);
2896 memcpy(buf+len, eb->buf_buf, count - len);
2897 eb->buf_get = eb->buf_buf + count - len;
2898 } else {
2899 memcpy(buf, eb->buf_get, count);
2900 if (count < len)
2901 eb->buf_get += count;
2902 else /* count == len */
2903 eb->buf_get = eb->buf_buf;
2904 }
2905
2906 return count;
2907 }
2908
2909
2910 static struct usb_serial_driver edgeport_1port_device = {
2911 .driver = {
2912 .owner = THIS_MODULE,
2913 .name = "edgeport_ti_1",
2914 },
2915 .description = "Edgeport TI 1 port adapter",
2916 .usb_driver = &io_driver,
2917 .id_table = edgeport_1port_id_table,
2918 .num_ports = 1,
2919 .open = edge_open,
2920 .close = edge_close,
2921 .throttle = edge_throttle,
2922 .unthrottle = edge_unthrottle,
2923 .attach = edge_startup,
2924 .shutdown = edge_shutdown,
2925 .port_probe = edge_create_sysfs_attrs,
2926 .ioctl = edge_ioctl,
2927 .set_termios = edge_set_termios,
2928 .tiocmget = edge_tiocmget,
2929 .tiocmset = edge_tiocmset,
2930 .write = edge_write,
2931 .write_room = edge_write_room,
2932 .chars_in_buffer = edge_chars_in_buffer,
2933 .break_ctl = edge_break,
2934 .read_int_callback = edge_interrupt_callback,
2935 .read_bulk_callback = edge_bulk_in_callback,
2936 .write_bulk_callback = edge_bulk_out_callback,
2937 };
2938
2939 static struct usb_serial_driver edgeport_2port_device = {
2940 .driver = {
2941 .owner = THIS_MODULE,
2942 .name = "edgeport_ti_2",
2943 },
2944 .description = "Edgeport TI 2 port adapter",
2945 .usb_driver = &io_driver,
2946 .id_table = edgeport_2port_id_table,
2947 .num_ports = 2,
2948 .open = edge_open,
2949 .close = edge_close,
2950 .throttle = edge_throttle,
2951 .unthrottle = edge_unthrottle,
2952 .attach = edge_startup,
2953 .shutdown = edge_shutdown,
2954 .port_probe = edge_create_sysfs_attrs,
2955 .ioctl = edge_ioctl,
2956 .set_termios = edge_set_termios,
2957 .tiocmget = edge_tiocmget,
2958 .tiocmset = edge_tiocmset,
2959 .write = edge_write,
2960 .write_room = edge_write_room,
2961 .chars_in_buffer = edge_chars_in_buffer,
2962 .break_ctl = edge_break,
2963 .read_int_callback = edge_interrupt_callback,
2964 .read_bulk_callback = edge_bulk_in_callback,
2965 .write_bulk_callback = edge_bulk_out_callback,
2966 };
2967
2968
2969 static int __init edgeport_init(void)
2970 {
2971 int retval;
2972 retval = usb_serial_register(&edgeport_1port_device);
2973 if (retval)
2974 goto failed_1port_device_register;
2975 retval = usb_serial_register(&edgeport_2port_device);
2976 if (retval)
2977 goto failed_2port_device_register;
2978 retval = usb_register(&io_driver);
2979 if (retval)
2980 goto failed_usb_register;
2981 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2982 DRIVER_DESC "\n");
2983 return 0;
2984 failed_usb_register:
2985 usb_serial_deregister(&edgeport_2port_device);
2986 failed_2port_device_register:
2987 usb_serial_deregister(&edgeport_1port_device);
2988 failed_1port_device_register:
2989 return retval;
2990 }
2991
2992 static void __exit edgeport_exit(void)
2993 {
2994 usb_deregister(&io_driver);
2995 usb_serial_deregister(&edgeport_1port_device);
2996 usb_serial_deregister(&edgeport_2port_device);
2997 }
2998
2999 module_init(edgeport_init);
3000 module_exit(edgeport_exit);
3001
3002 /* Module information */
3003 MODULE_AUTHOR(DRIVER_AUTHOR);
3004 MODULE_DESCRIPTION(DRIVER_DESC);
3005 MODULE_LICENSE("GPL");
3006 MODULE_FIRMWARE("edgeport/down3.bin");
3007
3008 module_param(debug, bool, S_IRUGO | S_IWUSR);
3009 MODULE_PARM_DESC(debug, "Debug enabled or not");
3010
3011 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
3012 MODULE_PARM_DESC(low_latency, "Low latency enabled or not");
3013
3014 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
3015 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
3016
3017 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
3018 MODULE_PARM_DESC(ignore_cpu_rev,
3019 "Ignore the cpu revision when connecting to a device");
3020
3021 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
3022 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
Support for the Chinese Samsung S3C2440 based development boards