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initial commit with v3.6.7
[linux-3.6.7-moxart.git] / drivers / usb / serial / io_ti.c
blobccf297dbad965e9b9218fe149cde7ed22e6d2dac
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/init.h>
24 #include <linux/slab.h>
25 #include <linux/tty.h>
26 #include <linux/tty_driver.h>
27 #include <linux/tty_flip.h>
28 #include <linux/module.h>
29 #include <linux/spinlock.h>
30 #include <linux/mutex.h>
31 #include <linux/serial.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 /*
44 * Version Information
45 */
46 #define DRIVER_VERSION "v0.7mode043006"
47 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
48 #define DRIVER_DESC "Edgeport USB Serial Driver"
49
50 #define EPROM_PAGE_SIZE 64
51
52
53 /* different hardware types */
54 #define HARDWARE_TYPE_930 0
55 #define HARDWARE_TYPE_TIUMP 1
56
57 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
58 #define TI_MODE_CONFIGURING 0 /* Device has not entered start device */
59 #define TI_MODE_BOOT 1 /* Staying in boot mode */
60 #define TI_MODE_DOWNLOAD 2 /* Made it to download mode */
61 #define TI_MODE_TRANSITIONING 3 /* Currently in boot mode but
62 transitioning to download mode */
63
64 /* read urb state */
65 #define EDGE_READ_URB_RUNNING 0
66 #define EDGE_READ_URB_STOPPING 1
67 #define EDGE_READ_URB_STOPPED 2
68
69 #define EDGE_CLOSING_WAIT 4000 /* in .01 sec */
70
71 #define EDGE_OUT_BUF_SIZE 1024
72
73
74 /* Product information read from the Edgeport */
75 struct product_info {
76 int TiMode; /* Current TI Mode */
77 __u8 hardware_type; /* Type of hardware */
78 } __attribute__((packed));
79
80 struct edgeport_port {
81 __u16 uart_base;
82 __u16 dma_address;
83 __u8 shadow_msr;
84 __u8 shadow_mcr;
85 __u8 shadow_lsr;
86 __u8 lsr_mask;
87 __u32 ump_read_timeout; /* Number of milliseconds the UMP will
88 wait without data before completing
89 a read short */
90 int baud_rate;
91 int close_pending;
92 int lsr_event;
93 struct async_icount icount;
94 wait_queue_head_t delta_msr_wait; /* for handling sleeping while
95 waiting for msr change to
96 happen */
97 struct edgeport_serial *edge_serial;
98 struct usb_serial_port *port;
99 __u8 bUartMode; /* Port type, 0: RS232, etc. */
100 spinlock_t ep_lock;
101 int ep_read_urb_state;
102 int ep_write_urb_in_use;
103 struct kfifo write_fifo;
104 };
105
106 struct edgeport_serial {
107 struct product_info product_info;
108 u8 TI_I2C_Type; /* Type of I2C in UMP */
109 u8 TiReadI2C; /* Set to TRUE if we have read the
110 I2c in Boot Mode */
111 struct mutex es_lock;
112 int num_ports_open;
113 struct usb_serial *serial;
114 };
115
116
117 /* Devices that this driver supports */
118 static const struct usb_device_id edgeport_1port_id_table[] = {
119 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
120 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
121 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
122 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
123 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
124 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
125 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
126 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
127 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
128 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
129 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
130 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
131 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
132 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
133 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
134 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
135 { }
136 };
137
138 static const struct usb_device_id edgeport_2port_id_table[] = {
139 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
140 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
141 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
142 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
143 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
144 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
145 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
146 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
147 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
148 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
149 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
150 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
151 /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
152 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
153 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
154 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
155 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
156 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
157 { }
158 };
159
160 /* Devices that this driver supports */
161 static const struct usb_device_id id_table_combined[] = {
162 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
163 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
164 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
165 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
166 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
167 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
168 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
169 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
170 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
171 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
172 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
173 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
174 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
175 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
176 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
177 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
178 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
179 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
180 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
181 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
182 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
183 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
184 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
185 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
186 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
187 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
188 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
189 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
190 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
191 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
192 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
193 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
194 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
195 { }
196 };
197
198 MODULE_DEVICE_TABLE(usb, id_table_combined);
199
200 static unsigned char OperationalMajorVersion;
201 static unsigned char OperationalMinorVersion;
202 static unsigned short OperationalBuildNumber;
203
204 static bool debug;
205
206 static int closing_wait = EDGE_CLOSING_WAIT;
207 static bool ignore_cpu_rev;
208 static int default_uart_mode; /* RS232 */
209
210 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
211 unsigned char *data, int length);
212
213 static void stop_read(struct edgeport_port *edge_port);
214 static int restart_read(struct edgeport_port *edge_port);
215
216 static void edge_set_termios(struct tty_struct *tty,
217 struct usb_serial_port *port, struct ktermios *old_termios);
218 static void edge_send(struct tty_struct *tty);
219
220 /* sysfs attributes */
221 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
222 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
223
224
225 static int ti_vread_sync(struct usb_device *dev, __u8 request,
226 __u16 value, __u16 index, u8 *data, int size)
227 {
228 int status;
229
230 status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
231 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
232 value, index, data, size, 1000);
233 if (status < 0)
234 return status;
235 if (status != size) {
236 dbg("%s - wanted to write %d, but only wrote %d",
237 __func__, size, status);
238 return -ECOMM;
239 }
240 return 0;
241 }
242
243 static int ti_vsend_sync(struct usb_device *dev, __u8 request,
244 __u16 value, __u16 index, u8 *data, int size)
245 {
246 int status;
247
248 status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
249 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
250 value, index, data, size, 1000);
251 if (status < 0)
252 return status;
253 if (status != size) {
254 dbg("%s - wanted to write %d, but only wrote %d",
255 __func__, size, status);
256 return -ECOMM;
257 }
258 return 0;
259 }
260
261 static int send_cmd(struct usb_device *dev, __u8 command,
262 __u8 moduleid, __u16 value, u8 *data,
263 int size)
264 {
265 return ti_vsend_sync(dev, command, value, moduleid, data, size);
266 }
267
268 /* clear tx/rx buffers and fifo in TI UMP */
269 static int purge_port(struct usb_serial_port *port, __u16 mask)
270 {
271 int port_number = port->number - port->serial->minor;
272
273 dbg("%s - port %d, mask %x", __func__, port_number, mask);
274
275 return send_cmd(port->serial->dev,
276 UMPC_PURGE_PORT,
277 (__u8)(UMPM_UART1_PORT + port_number),
278 mask,
279 NULL,
280 0);
281 }
282
283 /**
284 * read_download_mem - Read edgeport memory from TI chip
285 * @dev: usb device pointer
286 * @start_address: Device CPU address at which to read
287 * @length: Length of above data
288 * @address_type: Can read both XDATA and I2C
289 * @buffer: pointer to input data buffer
290 */
291 static int read_download_mem(struct usb_device *dev, int start_address,
292 int length, __u8 address_type, __u8 *buffer)
293 {
294 int status = 0;
295 __u8 read_length;
296 __be16 be_start_address;
297
298 dbg("%s - @ %x for %d", __func__, start_address, length);
299
300 /* Read in blocks of 64 bytes
301 * (TI firmware can't handle more than 64 byte reads)
302 */
303 while (length) {
304 if (length > 64)
305 read_length = 64;
306 else
307 read_length = (__u8)length;
308
309 if (read_length > 1) {
310 dbg("%s - @ %x for %d", __func__,
311 start_address, read_length);
312 }
313 be_start_address = cpu_to_be16(start_address);
314 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
315 (__u16)address_type,
316 (__force __u16)be_start_address,
317 buffer, read_length);
318
319 if (status) {
320 dbg("%s - ERROR %x", __func__, status);
321 return status;
322 }
323
324 if (read_length > 1)
325 usb_serial_debug_data(debug, &dev->dev, __func__,
326 read_length, buffer);
327
328 /* Update pointers/length */
329 start_address += read_length;
330 buffer += read_length;
331 length -= read_length;
332 }
333
334 return status;
335 }
336
337 static int read_ram(struct usb_device *dev, int start_address,
338 int length, __u8 *buffer)
339 {
340 return read_download_mem(dev, start_address, length,
341 DTK_ADDR_SPACE_XDATA, buffer);
342 }
343
344 /* Read edgeport memory to a given block */
345 static int read_boot_mem(struct edgeport_serial *serial,
346 int start_address, int length, __u8 *buffer)
347 {
348 int status = 0;
349 int i;
350
351 for (i = 0; i < length; i++) {
352 status = ti_vread_sync(serial->serial->dev,
353 UMPC_MEMORY_READ, serial->TI_I2C_Type,
354 (__u16)(start_address+i), &buffer[i], 0x01);
355 if (status) {
356 dbg("%s - ERROR %x", __func__, status);
357 return status;
358 }
359 }
360
361 dbg("%s - start_address = %x, length = %d",
362 __func__, start_address, length);
363 usb_serial_debug_data(debug, &serial->serial->dev->dev,
364 __func__, length, buffer);
365
366 serial->TiReadI2C = 1;
367
368 return status;
369 }
370
371 /* Write given block to TI EPROM memory */
372 static int write_boot_mem(struct edgeport_serial *serial,
373 int start_address, int length, __u8 *buffer)
374 {
375 int status = 0;
376 int i;
377 u8 *temp;
378
379 /* Must do a read before write */
380 if (!serial->TiReadI2C) {
381 temp = kmalloc(1, GFP_KERNEL);
382 if (!temp) {
383 dev_err(&serial->serial->dev->dev,
384 "%s - out of memory\n", __func__);
385 return -ENOMEM;
386 }
387 status = read_boot_mem(serial, 0, 1, temp);
388 kfree(temp);
389 if (status)
390 return status;
391 }
392
393 for (i = 0; i < length; ++i) {
394 status = ti_vsend_sync(serial->serial->dev,
395 UMPC_MEMORY_WRITE, buffer[i],
396 (__u16)(i + start_address), NULL, 0);
397 if (status)
398 return status;
399 }
400
401 dbg("%s - start_sddr = %x, length = %d",
402 __func__, start_address, length);
403 usb_serial_debug_data(debug, &serial->serial->dev->dev,
404 __func__, length, buffer);
405
406 return status;
407 }
408
409
410 /* Write edgeport I2C memory to TI chip */
411 static int write_i2c_mem(struct edgeport_serial *serial,
412 int start_address, int length, __u8 address_type, __u8 *buffer)
413 {
414 int status = 0;
415 int write_length;
416 __be16 be_start_address;
417
418 /* We can only send a maximum of 1 aligned byte page at a time */
419
420 /* calculate the number of bytes left in the first page */
421 write_length = EPROM_PAGE_SIZE -
422 (start_address & (EPROM_PAGE_SIZE - 1));
423
424 if (write_length > length)
425 write_length = length;
426
427 dbg("%s - BytesInFirstPage Addr = %x, length = %d",
428 __func__, start_address, write_length);
429 usb_serial_debug_data(debug, &serial->serial->dev->dev,
430 __func__, write_length, buffer);
431
432 /* Write first page */
433 be_start_address = cpu_to_be16(start_address);
434 status = ti_vsend_sync(serial->serial->dev,
435 UMPC_MEMORY_WRITE, (__u16)address_type,
436 (__force __u16)be_start_address,
437 buffer, write_length);
438 if (status) {
439 dbg("%s - ERROR %d", __func__, status);
440 return status;
441 }
442
443 length -= write_length;
444 start_address += write_length;
445 buffer += write_length;
446
447 /* We should be aligned now -- can write
448 max page size bytes at a time */
449 while (length) {
450 if (length > EPROM_PAGE_SIZE)
451 write_length = EPROM_PAGE_SIZE;
452 else
453 write_length = length;
454
455 dbg("%s - Page Write Addr = %x, length = %d",
456 __func__, start_address, write_length);
457 usb_serial_debug_data(debug, &serial->serial->dev->dev,
458 __func__, write_length, buffer);
459
460 /* Write next page */
461 be_start_address = cpu_to_be16(start_address);
462 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
463 (__u16)address_type,
464 (__force __u16)be_start_address,
465 buffer, write_length);
466 if (status) {
467 dev_err(&serial->serial->dev->dev, "%s - ERROR %d\n",
468 __func__, status);
469 return status;
470 }
471
472 length -= write_length;
473 start_address += write_length;
474 buffer += write_length;
475 }
476 return status;
477 }
478
479 /* Examine the UMP DMA registers and LSR
480 *
481 * Check the MSBit of the X and Y DMA byte count registers.
482 * A zero in this bit indicates that the TX DMA buffers are empty
483 * then check the TX Empty bit in the UART.
484 */
485 static int tx_active(struct edgeport_port *port)
486 {
487 int status;
488 struct out_endpoint_desc_block *oedb;
489 __u8 *lsr;
490 int bytes_left = 0;
491
492 oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
493 if (!oedb) {
494 dev_err(&port->port->dev, "%s - out of memory\n", __func__);
495 return -ENOMEM;
496 }
497
498 lsr = kmalloc(1, GFP_KERNEL); /* Sigh, that's right, just one byte,
499 as not all platforms can do DMA
500 from stack */
501 if (!lsr) {
502 kfree(oedb);
503 return -ENOMEM;
504 }
505 /* Read the DMA Count Registers */
506 status = read_ram(port->port->serial->dev, port->dma_address,
507 sizeof(*oedb), (void *)oedb);
508 if (status)
509 goto exit_is_tx_active;
510
511 dbg("%s - XByteCount 0x%X", __func__, oedb->XByteCount);
512
513 /* and the LSR */
514 status = read_ram(port->port->serial->dev,
515 port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
516
517 if (status)
518 goto exit_is_tx_active;
519 dbg("%s - LSR = 0x%X", __func__, *lsr);
520
521 /* If either buffer has data or we are transmitting then return TRUE */
522 if ((oedb->XByteCount & 0x80) != 0)
523 bytes_left += 64;
524
525 if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
526 bytes_left += 1;
527
528 /* We return Not Active if we get any kind of error */
529 exit_is_tx_active:
530 dbg("%s - return %d", __func__, bytes_left);
531
532 kfree(lsr);
533 kfree(oedb);
534 return bytes_left;
535 }
536
537 static void chase_port(struct edgeport_port *port, unsigned long timeout,
538 int flush)
539 {
540 int baud_rate;
541 struct tty_struct *tty = tty_port_tty_get(&port->port->port);
542 struct usb_serial *serial = port->port->serial;
543 wait_queue_t wait;
544 unsigned long flags;
545
546 if (!timeout)
547 timeout = (HZ * EDGE_CLOSING_WAIT)/100;
548
549 /* wait for data to drain from the buffer */
550 spin_lock_irqsave(&port->ep_lock, flags);
551 init_waitqueue_entry(&wait, current);
552 add_wait_queue(&tty->write_wait, &wait);
553 for (;;) {
554 set_current_state(TASK_INTERRUPTIBLE);
555 if (kfifo_len(&port->write_fifo) == 0
556 || timeout == 0 || signal_pending(current)
557 || serial->disconnected)
558 /* disconnect */
559 break;
560 spin_unlock_irqrestore(&port->ep_lock, flags);
561 timeout = schedule_timeout(timeout);
562 spin_lock_irqsave(&port->ep_lock, flags);
563 }
564 set_current_state(TASK_RUNNING);
565 remove_wait_queue(&tty->write_wait, &wait);
566 if (flush)
567 kfifo_reset_out(&port->write_fifo);
568 spin_unlock_irqrestore(&port->ep_lock, flags);
569 tty_kref_put(tty);
570
571 /* wait for data to drain from the device */
572 timeout += jiffies;
573 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
574 && !serial->disconnected) {
575 /* not disconnected */
576 if (!tx_active(port))
577 break;
578 msleep(10);
579 }
580
581 /* disconnected */
582 if (serial->disconnected)
583 return;
584
585 /* wait one more character time, based on baud rate */
586 /* (tx_active doesn't seem to wait for the last byte) */
587 baud_rate = port->baud_rate;
588 if (baud_rate == 0)
589 baud_rate = 50;
590 msleep(max(1, DIV_ROUND_UP(10000, baud_rate)));
591 }
592
593 static int choose_config(struct usb_device *dev)
594 {
595 /*
596 * There may be multiple configurations on this device, in which case
597 * we would need to read and parse all of them to find out which one
598 * we want. However, we just support one config at this point,
599 * configuration # 1, which is Config Descriptor 0.
600 */
601
602 dbg("%s - Number of Interfaces = %d",
603 __func__, dev->config->desc.bNumInterfaces);
604 dbg("%s - MAX Power = %d",
605 __func__, dev->config->desc.bMaxPower * 2);
606
607 if (dev->config->desc.bNumInterfaces != 1) {
608 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n",
609 __func__);
610 return -ENODEV;
611 }
612
613 return 0;
614 }
615
616 static int read_rom(struct edgeport_serial *serial,
617 int start_address, int length, __u8 *buffer)
618 {
619 int status;
620
621 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
622 status = read_download_mem(serial->serial->dev,
623 start_address,
624 length,
625 serial->TI_I2C_Type,
626 buffer);
627 } else {
628 status = read_boot_mem(serial, start_address, length,
629 buffer);
630 }
631 return status;
632 }
633
634 static int write_rom(struct edgeport_serial *serial, int start_address,
635 int length, __u8 *buffer)
636 {
637 if (serial->product_info.TiMode == TI_MODE_BOOT)
638 return write_boot_mem(serial, start_address, length,
639 buffer);
640
641 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
642 return write_i2c_mem(serial, start_address, length,
643 serial->TI_I2C_Type, buffer);
644 return -EINVAL;
645 }
646
647
648
649 /* Read a descriptor header from I2C based on type */
650 static int get_descriptor_addr(struct edgeport_serial *serial,
651 int desc_type, struct ti_i2c_desc *rom_desc)
652 {
653 int start_address;
654 int status;
655
656 /* Search for requested descriptor in I2C */
657 start_address = 2;
658 do {
659 status = read_rom(serial,
660 start_address,
661 sizeof(struct ti_i2c_desc),
662 (__u8 *)rom_desc);
663 if (status)
664 return 0;
665
666 if (rom_desc->Type == desc_type)
667 return start_address;
668
669 start_address = start_address + sizeof(struct ti_i2c_desc)
670 + rom_desc->Size;
671
672 } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
673
674 return 0;
675 }
676
677 /* Validate descriptor checksum */
678 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
679 {
680 __u16 i;
681 __u8 cs = 0;
682
683 for (i = 0; i < rom_desc->Size; i++)
684 cs = (__u8)(cs + buffer[i]);
685
686 if (cs != rom_desc->CheckSum) {
687 dbg("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
688 return -EINVAL;
689 }
690 return 0;
691 }
692
693 /* Make sure that the I2C image is good */
694 static int check_i2c_image(struct edgeport_serial *serial)
695 {
696 struct device *dev = &serial->serial->dev->dev;
697 int status = 0;
698 struct ti_i2c_desc *rom_desc;
699 int start_address = 2;
700 __u8 *buffer;
701 __u16 ttype;
702
703 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
704 if (!rom_desc) {
705 dev_err(dev, "%s - out of memory\n", __func__);
706 return -ENOMEM;
707 }
708 buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
709 if (!buffer) {
710 dev_err(dev, "%s - out of memory when allocating buffer\n",
711 __func__);
712 kfree(rom_desc);
713 return -ENOMEM;
714 }
715
716 /* Read the first byte (Signature0) must be 0x52 or 0x10 */
717 status = read_rom(serial, 0, 1, buffer);
718 if (status)
719 goto out;
720
721 if (*buffer != UMP5152 && *buffer != UMP3410) {
722 dev_err(dev, "%s - invalid buffer signature\n", __func__);
723 status = -ENODEV;
724 goto out;
725 }
726
727 do {
728 /* Validate the I2C */
729 status = read_rom(serial,
730 start_address,
731 sizeof(struct ti_i2c_desc),
732 (__u8 *)rom_desc);
733 if (status)
734 break;
735
736 if ((start_address + sizeof(struct ti_i2c_desc) +
737 rom_desc->Size) > TI_MAX_I2C_SIZE) {
738 status = -ENODEV;
739 dbg("%s - structure too big, erroring out.", __func__);
740 break;
741 }
742
743 dbg("%s Type = 0x%x", __func__, rom_desc->Type);
744
745 /* Skip type 2 record */
746 ttype = rom_desc->Type & 0x0f;
747 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
748 && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
749 /* Read the descriptor data */
750 status = read_rom(serial, start_address +
751 sizeof(struct ti_i2c_desc),
752 rom_desc->Size, buffer);
753 if (status)
754 break;
755
756 status = valid_csum(rom_desc, buffer);
757 if (status)
758 break;
759 }
760 start_address = start_address + sizeof(struct ti_i2c_desc) +
761 rom_desc->Size;
762
763 } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
764 (start_address < TI_MAX_I2C_SIZE));
765
766 if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
767 (start_address > TI_MAX_I2C_SIZE))
768 status = -ENODEV;
769
770 out:
771 kfree(buffer);
772 kfree(rom_desc);
773 return status;
774 }
775
776 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
777 {
778 int status;
779 int start_address;
780 struct ti_i2c_desc *rom_desc;
781 struct edge_ti_manuf_descriptor *desc;
782
783 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
784 if (!rom_desc) {
785 dev_err(&serial->serial->dev->dev, "%s - out of memory\n",
786 __func__);
787 return -ENOMEM;
788 }
789 start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
790 rom_desc);
791
792 if (!start_address) {
793 dbg("%s - Edge Descriptor not found in I2C", __func__);
794 status = -ENODEV;
795 goto exit;
796 }
797
798 /* Read the descriptor data */
799 status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
800 rom_desc->Size, buffer);
801 if (status)
802 goto exit;
803
804 status = valid_csum(rom_desc, buffer);
805
806 desc = (struct edge_ti_manuf_descriptor *)buffer;
807 dbg("%s - IonConfig 0x%x", __func__, desc->IonConfig);
808 dbg("%s - Version %d", __func__, desc->Version);
809 dbg("%s - Cpu/Board 0x%x", __func__, desc->CpuRev_BoardRev);
810 dbg("%s - NumPorts %d", __func__, desc->NumPorts);
811 dbg("%s - NumVirtualPorts %d", __func__, desc->NumVirtualPorts);
812 dbg("%s - TotalPorts %d", __func__, desc->TotalPorts);
813
814 exit:
815 kfree(rom_desc);
816 return status;
817 }
818
819 /* Build firmware header used for firmware update */
820 static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
821 {
822 __u8 *buffer;
823 int buffer_size;
824 int i;
825 int err;
826 __u8 cs = 0;
827 struct ti_i2c_desc *i2c_header;
828 struct ti_i2c_image_header *img_header;
829 struct ti_i2c_firmware_rec *firmware_rec;
830 const struct firmware *fw;
831 const char *fw_name = "edgeport/down3.bin";
832
833 /* In order to update the I2C firmware we must change the type 2 record
834 * to type 0xF2. This will force the UMP to come up in Boot Mode.
835 * Then while in boot mode, the driver will download the latest
836 * firmware (padded to 15.5k) into the UMP ram. And finally when the
837 * device comes back up in download mode the driver will cause the new
838 * firmware to be copied from the UMP Ram to I2C and the firmware will
839 * update the record type from 0xf2 to 0x02.
840 */
841
842 /* Allocate a 15.5k buffer + 2 bytes for version number
843 * (Firmware Record) */
844 buffer_size = (((1024 * 16) - 512 ) +
845 sizeof(struct ti_i2c_firmware_rec));
846
847 buffer = kmalloc(buffer_size, GFP_KERNEL);
848 if (!buffer) {
849 dev_err(dev, "%s - out of memory\n", __func__);
850 return -ENOMEM;
851 }
852
853 // Set entire image of 0xffs
854 memset(buffer, 0xff, buffer_size);
855
856 err = request_firmware(&fw, fw_name, dev);
857 if (err) {
858 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
859 fw_name, err);
860 kfree(buffer);
861 return err;
862 }
863
864 /* Save Download Version Number */
865 OperationalMajorVersion = fw->data[0];
866 OperationalMinorVersion = fw->data[1];
867 OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
868
869 /* Copy version number into firmware record */
870 firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
871
872 firmware_rec->Ver_Major = OperationalMajorVersion;
873 firmware_rec->Ver_Minor = OperationalMinorVersion;
874
875 /* Pointer to fw_down memory image */
876 img_header = (struct ti_i2c_image_header *)&fw->data[4];
877
878 memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
879 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
880 le16_to_cpu(img_header->Length));
881
882 release_firmware(fw);
883
884 for (i=0; i < buffer_size; i++) {
885 cs = (__u8)(cs + buffer[i]);
886 }
887
888 kfree(buffer);
889
890 /* Build new header */
891 i2c_header = (struct ti_i2c_desc *)header;
892 firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data;
893
894 i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK;
895 i2c_header->Size = (__u16)buffer_size;
896 i2c_header->CheckSum = cs;
897 firmware_rec->Ver_Major = OperationalMajorVersion;
898 firmware_rec->Ver_Minor = OperationalMinorVersion;
899
900 return 0;
901 }
902
903 /* Try to figure out what type of I2c we have */
904 static int i2c_type_bootmode(struct edgeport_serial *serial)
905 {
906 int status;
907 u8 *data;
908
909 data = kmalloc(1, GFP_KERNEL);
910 if (!data) {
911 dev_err(&serial->serial->dev->dev,
912 "%s - out of memory\n", __func__);
913 return -ENOMEM;
914 }
915
916 /* Try to read type 2 */
917 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
918 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
919 if (status)
920 dbg("%s - read 2 status error = %d", __func__, status);
921 else
922 dbg("%s - read 2 data = 0x%x", __func__, *data);
923 if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
924 dbg("%s - ROM_TYPE_II", __func__);
925 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
926 goto out;
927 }
928
929 /* Try to read type 3 */
930 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
931 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
932 if (status)
933 dbg("%s - read 3 status error = %d", __func__, status);
934 else
935 dbg("%s - read 2 data = 0x%x", __func__, *data);
936 if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
937 dbg("%s - ROM_TYPE_III", __func__);
938 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
939 goto out;
940 }
941
942 dbg("%s - Unknown", __func__);
943 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
944 status = -ENODEV;
945 out:
946 kfree(data);
947 return status;
948 }
949
950 static int bulk_xfer(struct usb_serial *serial, void *buffer,
951 int length, int *num_sent)
952 {
953 int status;
954
955 status = usb_bulk_msg(serial->dev,
956 usb_sndbulkpipe(serial->dev,
957 serial->port[0]->bulk_out_endpointAddress),
958 buffer, length, num_sent, 1000);
959 return status;
960 }
961
962 /* Download given firmware image to the device (IN BOOT MODE) */
963 static int download_code(struct edgeport_serial *serial, __u8 *image,
964 int image_length)
965 {
966 int status = 0;
967 int pos;
968 int transfer;
969 int done;
970
971 /* Transfer firmware image */
972 for (pos = 0; pos < image_length; ) {
973 /* Read the next buffer from file */
974 transfer = image_length - pos;
975 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
976 transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
977
978 /* Transfer data */
979 status = bulk_xfer(serial->serial, &image[pos],
980 transfer, &done);
981 if (status)
982 break;
983 /* Advance buffer pointer */
984 pos += done;
985 }
986
987 return status;
988 }
989
990 /* FIXME!!! */
991 static int config_boot_dev(struct usb_device *dev)
992 {
993 return 0;
994 }
995
996 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
997 {
998 return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
999 }
1000
1001 /**
1002 * DownloadTIFirmware - Download run-time operating firmware to the TI5052
1003 *
1004 * This routine downloads the main operating code into the TI5052, using the
1005 * boot code already burned into E2PROM or ROM.
1006 */
1007 static int download_fw(struct edgeport_serial *serial)
1008 {
1009 struct device *dev = &serial->serial->dev->dev;
1010 int status = 0;
1011 int start_address;
1012 struct edge_ti_manuf_descriptor *ti_manuf_desc;
1013 struct usb_interface_descriptor *interface;
1014 int download_cur_ver;
1015 int download_new_ver;
1016
1017 /* This routine is entered by both the BOOT mode and the Download mode
1018 * We can determine which code is running by the reading the config
1019 * descriptor and if we have only one bulk pipe it is in boot mode
1020 */
1021 serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1022
1023 /* Default to type 2 i2c */
1024 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1025
1026 status = choose_config(serial->serial->dev);
1027 if (status)
1028 return status;
1029
1030 interface = &serial->serial->interface->cur_altsetting->desc;
1031 if (!interface) {
1032 dev_err(dev, "%s - no interface set, error!\n", __func__);
1033 return -ENODEV;
1034 }
1035
1036 /*
1037 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1038 * if we have more than one endpoint we are definitely in download
1039 * mode
1040 */
1041 if (interface->bNumEndpoints > 1)
1042 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1043 else
1044 /* Otherwise we will remain in configuring mode */
1045 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1046
1047 /********************************************************************/
1048 /* Download Mode */
1049 /********************************************************************/
1050 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
1051 struct ti_i2c_desc *rom_desc;
1052
1053 dbg("%s - RUNNING IN DOWNLOAD MODE", __func__);
1054
1055 status = check_i2c_image(serial);
1056 if (status) {
1057 dbg("%s - DOWNLOAD MODE -- BAD I2C", __func__);
1058 return status;
1059 }
1060
1061 /* Validate Hardware version number
1062 * Read Manufacturing Descriptor from TI Based Edgeport
1063 */
1064 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1065 if (!ti_manuf_desc) {
1066 dev_err(dev, "%s - out of memory.\n", __func__);
1067 return -ENOMEM;
1068 }
1069 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1070 if (status) {
1071 kfree(ti_manuf_desc);
1072 return status;
1073 }
1074
1075 /* Check version number of ION descriptor */
1076 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1077 dbg("%s - Wrong CPU Rev %d (Must be 2)",
1078 __func__, ti_cpu_rev(ti_manuf_desc));
1079 kfree(ti_manuf_desc);
1080 return -EINVAL;
1081 }
1082
1083 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1084 if (!rom_desc) {
1085 dev_err(dev, "%s - out of memory.\n", __func__);
1086 kfree(ti_manuf_desc);
1087 return -ENOMEM;
1088 }
1089
1090 /* Search for type 2 record (firmware record) */
1091 start_address = get_descriptor_addr(serial,
1092 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1093 if (start_address != 0) {
1094 struct ti_i2c_firmware_rec *firmware_version;
1095 u8 *record;
1096
1097 dbg("%s - Found Type FIRMWARE (Type 2) record",
1098 __func__);
1099
1100 firmware_version = kmalloc(sizeof(*firmware_version),
1101 GFP_KERNEL);
1102 if (!firmware_version) {
1103 dev_err(dev, "%s - out of memory.\n", __func__);
1104 kfree(rom_desc);
1105 kfree(ti_manuf_desc);
1106 return -ENOMEM;
1107 }
1108
1109 /* Validate version number
1110 * Read the descriptor data
1111 */
1112 status = read_rom(serial, start_address +
1113 sizeof(struct ti_i2c_desc),
1114 sizeof(struct ti_i2c_firmware_rec),
1115 (__u8 *)firmware_version);
1116 if (status) {
1117 kfree(firmware_version);
1118 kfree(rom_desc);
1119 kfree(ti_manuf_desc);
1120 return status;
1121 }
1122
1123 /* Check version number of download with current
1124 version in I2c */
1125 download_cur_ver = (firmware_version->Ver_Major << 8) +
1126 (firmware_version->Ver_Minor);
1127 download_new_ver = (OperationalMajorVersion << 8) +
1128 (OperationalMinorVersion);
1129
1130 dbg("%s - >> FW Versions Device %d.%d Driver %d.%d",
1131 __func__,
1132 firmware_version->Ver_Major,
1133 firmware_version->Ver_Minor,
1134 OperationalMajorVersion,
1135 OperationalMinorVersion);
1136
1137 /* Check if we have an old version in the I2C and
1138 update if necessary */
1139 if (download_cur_ver < download_new_ver) {
1140 dbg("%s - Update I2C dld from %d.%d to %d.%d",
1141 __func__,
1142 firmware_version->Ver_Major,
1143 firmware_version->Ver_Minor,
1144 OperationalMajorVersion,
1145 OperationalMinorVersion);
1146
1147 record = kmalloc(1, GFP_KERNEL);
1148 if (!record) {
1149 dev_err(dev, "%s - out of memory.\n",
1150 __func__);
1151 kfree(firmware_version);
1152 kfree(rom_desc);
1153 kfree(ti_manuf_desc);
1154 return -ENOMEM;
1155 }
1156 /* In order to update the I2C firmware we must
1157 * change the type 2 record to type 0xF2. This
1158 * will force the UMP to come up in Boot Mode.
1159 * Then while in boot mode, the driver will
1160 * download the latest firmware (padded to
1161 * 15.5k) into the UMP ram. Finally when the
1162 * device comes back up in download mode the
1163 * driver will cause the new firmware to be
1164 * copied from the UMP Ram to I2C and the
1165 * firmware will update the record type from
1166 * 0xf2 to 0x02.
1167 */
1168 *record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1169
1170 /* Change the I2C Firmware record type to
1171 0xf2 to trigger an update */
1172 status = write_rom(serial, start_address,
1173 sizeof(*record), record);
1174 if (status) {
1175 kfree(record);
1176 kfree(firmware_version);
1177 kfree(rom_desc);
1178 kfree(ti_manuf_desc);
1179 return status;
1180 }
1181
1182 /* verify the write -- must do this in order
1183 * for write to complete before we do the
1184 * hardware reset
1185 */
1186 status = read_rom(serial,
1187 start_address,
1188 sizeof(*record),
1189 record);
1190 if (status) {
1191 kfree(record);
1192 kfree(firmware_version);
1193 kfree(rom_desc);
1194 kfree(ti_manuf_desc);
1195 return status;
1196 }
1197
1198 if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1199 dev_err(dev,
1200 "%s - error resetting device\n",
1201 __func__);
1202 kfree(record);
1203 kfree(firmware_version);
1204 kfree(rom_desc);
1205 kfree(ti_manuf_desc);
1206 return -ENODEV;
1207 }
1208
1209 dbg("%s - HARDWARE RESET", __func__);
1210
1211 /* Reset UMP -- Back to BOOT MODE */
1212 status = ti_vsend_sync(serial->serial->dev,
1213 UMPC_HARDWARE_RESET,
1214 0, 0, NULL, 0);
1215
1216 dbg("%s - HARDWARE RESET return %d",
1217 __func__, status);
1218
1219 /* return an error on purpose. */
1220 kfree(record);
1221 kfree(firmware_version);
1222 kfree(rom_desc);
1223 kfree(ti_manuf_desc);
1224 return -ENODEV;
1225 }
1226 kfree(firmware_version);
1227 }
1228 /* Search for type 0xF2 record (firmware blank record) */
1229 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1230 #define HEADER_SIZE (sizeof(struct ti_i2c_desc) + \
1231 sizeof(struct ti_i2c_firmware_rec))
1232 __u8 *header;
1233 __u8 *vheader;
1234
1235 header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1236 if (!header) {
1237 dev_err(dev, "%s - out of memory.\n", __func__);
1238 kfree(rom_desc);
1239 kfree(ti_manuf_desc);
1240 return -ENOMEM;
1241 }
1242
1243 vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1244 if (!vheader) {
1245 dev_err(dev, "%s - out of memory.\n", __func__);
1246 kfree(header);
1247 kfree(rom_desc);
1248 kfree(ti_manuf_desc);
1249 return -ENOMEM;
1250 }
1251
1252 dbg("%s - Found Type BLANK FIRMWARE (Type F2) record",
1253 __func__);
1254
1255 /*
1256 * In order to update the I2C firmware we must change
1257 * the type 2 record to type 0xF2. This will force the
1258 * UMP to come up in Boot Mode. Then while in boot
1259 * mode, the driver will download the latest firmware
1260 * (padded to 15.5k) into the UMP ram. Finally when the
1261 * device comes back up in download mode the driver
1262 * will cause the new firmware to be copied from the
1263 * UMP Ram to I2C and the firmware will update the
1264 * record type from 0xf2 to 0x02.
1265 */
1266 status = build_i2c_fw_hdr(header, dev);
1267 if (status) {
1268 kfree(vheader);
1269 kfree(header);
1270 kfree(rom_desc);
1271 kfree(ti_manuf_desc);
1272 return -EINVAL;
1273 }
1274
1275 /* Update I2C with type 0xf2 record with correct
1276 size and checksum */
1277 status = write_rom(serial,
1278 start_address,
1279 HEADER_SIZE,
1280 header);
1281 if (status) {
1282 kfree(vheader);
1283 kfree(header);
1284 kfree(rom_desc);
1285 kfree(ti_manuf_desc);
1286 return -EINVAL;
1287 }
1288
1289 /* verify the write -- must do this in order for
1290 write to complete before we do the hardware reset */
1291 status = read_rom(serial, start_address,
1292 HEADER_SIZE, vheader);
1293
1294 if (status) {
1295 dbg("%s - can't read header back", __func__);
1296 kfree(vheader);
1297 kfree(header);
1298 kfree(rom_desc);
1299 kfree(ti_manuf_desc);
1300 return status;
1301 }
1302 if (memcmp(vheader, header, HEADER_SIZE)) {
1303 dbg("%s - write download record failed",
1304 __func__);
1305 kfree(vheader);
1306 kfree(header);
1307 kfree(rom_desc);
1308 kfree(ti_manuf_desc);
1309 return -EINVAL;
1310 }
1311
1312 kfree(vheader);
1313 kfree(header);
1314
1315 dbg("%s - Start firmware update", __func__);
1316
1317 /* Tell firmware to copy download image into I2C */
1318 status = ti_vsend_sync(serial->serial->dev,
1319 UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0);
1320
1321 dbg("%s - Update complete 0x%x", __func__, status);
1322 if (status) {
1323 dev_err(dev,
1324 "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1325 __func__);
1326 kfree(rom_desc);
1327 kfree(ti_manuf_desc);
1328 return status;
1329 }
1330 }
1331
1332 // The device is running the download code
1333 kfree(rom_desc);
1334 kfree(ti_manuf_desc);
1335 return 0;
1336 }
1337
1338 /********************************************************************/
1339 /* Boot Mode */
1340 /********************************************************************/
1341 dbg("%s - RUNNING IN BOOT MODE", __func__);
1342
1343 /* Configure the TI device so we can use the BULK pipes for download */
1344 status = config_boot_dev(serial->serial->dev);
1345 if (status)
1346 return status;
1347
1348 if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1349 != USB_VENDOR_ID_ION) {
1350 dbg("%s - VID = 0x%x", __func__,
1351 le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1352 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1353 goto stayinbootmode;
1354 }
1355
1356 /* We have an ION device (I2c Must be programmed)
1357 Determine I2C image type */
1358 if (i2c_type_bootmode(serial))
1359 goto stayinbootmode;
1360
1361 /* Check for ION Vendor ID and that the I2C is valid */
1362 if (!check_i2c_image(serial)) {
1363 struct ti_i2c_image_header *header;
1364 int i;
1365 __u8 cs = 0;
1366 __u8 *buffer;
1367 int buffer_size;
1368 int err;
1369 const struct firmware *fw;
1370 const char *fw_name = "edgeport/down3.bin";
1371
1372 /* Validate Hardware version number
1373 * Read Manufacturing Descriptor from TI Based Edgeport
1374 */
1375 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1376 if (!ti_manuf_desc) {
1377 dev_err(dev, "%s - out of memory.\n", __func__);
1378 return -ENOMEM;
1379 }
1380 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1381 if (status) {
1382 kfree(ti_manuf_desc);
1383 goto stayinbootmode;
1384 }
1385
1386 /* Check for version 2 */
1387 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1388 dbg("%s - Wrong CPU Rev %d (Must be 2)",
1389 __func__, ti_cpu_rev(ti_manuf_desc));
1390 kfree(ti_manuf_desc);
1391 goto stayinbootmode;
1392 }
1393
1394 kfree(ti_manuf_desc);
1395
1396 /*
1397 * In order to update the I2C firmware we must change the type
1398 * 2 record to type 0xF2. This will force the UMP to come up
1399 * in Boot Mode. Then while in boot mode, the driver will
1400 * download the latest firmware (padded to 15.5k) into the
1401 * UMP ram. Finally when the device comes back up in download
1402 * mode the driver will cause the new firmware to be copied
1403 * from the UMP Ram to I2C and the firmware will update the
1404 * record type from 0xf2 to 0x02.
1405 *
1406 * Do we really have to copy the whole firmware image,
1407 * or could we do this in place!
1408 */
1409
1410 /* Allocate a 15.5k buffer + 3 byte header */
1411 buffer_size = (((1024 * 16) - 512) +
1412 sizeof(struct ti_i2c_image_header));
1413 buffer = kmalloc(buffer_size, GFP_KERNEL);
1414 if (!buffer) {
1415 dev_err(dev, "%s - out of memory\n", __func__);
1416 return -ENOMEM;
1417 }
1418
1419 /* Initialize the buffer to 0xff (pad the buffer) */
1420 memset(buffer, 0xff, buffer_size);
1421
1422 err = request_firmware(&fw, fw_name, dev);
1423 if (err) {
1424 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
1425 fw_name, err);
1426 kfree(buffer);
1427 return err;
1428 }
1429 memcpy(buffer, &fw->data[4], fw->size - 4);
1430 release_firmware(fw);
1431
1432 for (i = sizeof(struct ti_i2c_image_header);
1433 i < buffer_size; i++) {
1434 cs = (__u8)(cs + buffer[i]);
1435 }
1436
1437 header = (struct ti_i2c_image_header *)buffer;
1438
1439 /* update length and checksum after padding */
1440 header->Length = cpu_to_le16((__u16)(buffer_size -
1441 sizeof(struct ti_i2c_image_header)));
1442 header->CheckSum = cs;
1443
1444 /* Download the operational code */
1445 dbg("%s - Downloading operational code image (TI UMP)",
1446 __func__);
1447 status = download_code(serial, buffer, buffer_size);
1448
1449 kfree(buffer);
1450
1451 if (status) {
1452 dbg("%s - Error downloading operational code image",
1453 __func__);
1454 return status;
1455 }
1456
1457 /* Device will reboot */
1458 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1459
1460 dbg("%s - Download successful -- Device rebooting...",
1461 __func__);
1462
1463 /* return an error on purpose */
1464 return -ENODEV;
1465 }
1466
1467 stayinbootmode:
1468 /* Eprom is invalid or blank stay in boot mode */
1469 dbg("%s - STAYING IN BOOT MODE", __func__);
1470 serial->product_info.TiMode = TI_MODE_BOOT;
1471
1472 return 0;
1473 }
1474
1475
1476 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1477 {
1478 int port_number = port->port->number - port->port->serial->minor;
1479 on = !!on; /* 1 or 0 not bitmask */
1480 return send_cmd(port->port->serial->dev,
1481 feature, (__u8)(UMPM_UART1_PORT + port_number),
1482 on, NULL, 0);
1483 }
1484
1485
1486 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1487 {
1488 int status = 0;
1489
1490 dbg("%s - %x", __func__, mcr);
1491
1492 status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1493 if (status)
1494 return status;
1495 status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1496 if (status)
1497 return status;
1498 return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1499 }
1500
1501 /* Convert TI LSR to standard UART flags */
1502 static __u8 map_line_status(__u8 ti_lsr)
1503 {
1504 __u8 lsr = 0;
1505
1506 #define MAP_FLAG(flagUmp, flagUart) \
1507 if (ti_lsr & flagUmp) \
1508 lsr |= flagUart;
1509
1510 MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */
1511 MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */
1512 MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */
1513 MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */
1514 MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* rx data available */
1515 MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* tx hold reg empty */
1516
1517 #undef MAP_FLAG
1518
1519 return lsr;
1520 }
1521
1522 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1523 {
1524 struct async_icount *icount;
1525 struct tty_struct *tty;
1526
1527 dbg("%s - %02x", __func__, msr);
1528
1529 if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1530 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1531 icount = &edge_port->icount;
1532
1533 /* update input line counters */
1534 if (msr & EDGEPORT_MSR_DELTA_CTS)
1535 icount->cts++;
1536 if (msr & EDGEPORT_MSR_DELTA_DSR)
1537 icount->dsr++;
1538 if (msr & EDGEPORT_MSR_DELTA_CD)
1539 icount->dcd++;
1540 if (msr & EDGEPORT_MSR_DELTA_RI)
1541 icount->rng++;
1542 wake_up_interruptible(&edge_port->delta_msr_wait);
1543 }
1544
1545 /* Save the new modem status */
1546 edge_port->shadow_msr = msr & 0xf0;
1547
1548 tty = tty_port_tty_get(&edge_port->port->port);
1549 /* handle CTS flow control */
1550 if (tty && C_CRTSCTS(tty)) {
1551 if (msr & EDGEPORT_MSR_CTS) {
1552 tty->hw_stopped = 0;
1553 tty_wakeup(tty);
1554 } else {
1555 tty->hw_stopped = 1;
1556 }
1557 }
1558 tty_kref_put(tty);
1559 }
1560
1561 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1562 __u8 lsr, __u8 data)
1563 {
1564 struct async_icount *icount;
1565 __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1566 LSR_FRM_ERR | LSR_BREAK));
1567 struct tty_struct *tty;
1568
1569 dbg("%s - %02x", __func__, new_lsr);
1570
1571 edge_port->shadow_lsr = lsr;
1572
1573 if (new_lsr & LSR_BREAK)
1574 /*
1575 * Parity and Framing errors only count if they
1576 * occur exclusive of a break being received.
1577 */
1578 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1579
1580 /* Place LSR data byte into Rx buffer */
1581 if (lsr_data) {
1582 tty = tty_port_tty_get(&edge_port->port->port);
1583 if (tty) {
1584 edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
1585 tty_kref_put(tty);
1586 }
1587 }
1588
1589 /* update input line counters */
1590 icount = &edge_port->icount;
1591 if (new_lsr & LSR_BREAK)
1592 icount->brk++;
1593 if (new_lsr & LSR_OVER_ERR)
1594 icount->overrun++;
1595 if (new_lsr & LSR_PAR_ERR)
1596 icount->parity++;
1597 if (new_lsr & LSR_FRM_ERR)
1598 icount->frame++;
1599 }
1600
1601
1602 static void edge_interrupt_callback(struct urb *urb)
1603 {
1604 struct edgeport_serial *edge_serial = urb->context;
1605 struct usb_serial_port *port;
1606 struct edgeport_port *edge_port;
1607 unsigned char *data = urb->transfer_buffer;
1608 int length = urb->actual_length;
1609 int port_number;
1610 int function;
1611 int retval;
1612 __u8 lsr;
1613 __u8 msr;
1614 int status = urb->status;
1615
1616 dbg("%s", __func__);
1617
1618 switch (status) {
1619 case 0:
1620 /* success */
1621 break;
1622 case -ECONNRESET:
1623 case -ENOENT:
1624 case -ESHUTDOWN:
1625 /* this urb is terminated, clean up */
1626 dbg("%s - urb shutting down with status: %d",
1627 __func__, status);
1628 return;
1629 default:
1630 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1631 "%d\n", __func__, status);
1632 goto exit;
1633 }
1634
1635 if (!length) {
1636 dbg("%s - no data in urb", __func__);
1637 goto exit;
1638 }
1639
1640 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
1641 __func__, length, data);
1642
1643 if (length != 2) {
1644 dbg("%s - expecting packet of size 2, got %d",
1645 __func__, length);
1646 goto exit;
1647 }
1648
1649 port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1650 function = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1651 dbg("%s - port_number %d, function %d, info 0x%x",
1652 __func__, port_number, function, data[1]);
1653 port = edge_serial->serial->port[port_number];
1654 edge_port = usb_get_serial_port_data(port);
1655 if (!edge_port) {
1656 dbg("%s - edge_port not found", __func__);
1657 return;
1658 }
1659 switch (function) {
1660 case TIUMP_INTERRUPT_CODE_LSR:
1661 lsr = map_line_status(data[1]);
1662 if (lsr & UMP_UART_LSR_DATA_MASK) {
1663 /* Save the LSR event for bulk read
1664 completion routine */
1665 dbg("%s - LSR Event Port %u LSR Status = %02x",
1666 __func__, port_number, lsr);
1667 edge_port->lsr_event = 1;
1668 edge_port->lsr_mask = lsr;
1669 } else {
1670 dbg("%s - ===== Port %d LSR Status = %02x ======",
1671 __func__, port_number, lsr);
1672 handle_new_lsr(edge_port, 0, lsr, 0);
1673 }
1674 break;
1675
1676 case TIUMP_INTERRUPT_CODE_MSR: /* MSR */
1677 /* Copy MSR from UMP */
1678 msr = data[1];
1679 dbg("%s - ===== Port %u MSR Status = %02x ======",
1680 __func__, port_number, msr);
1681 handle_new_msr(edge_port, msr);
1682 break;
1683
1684 default:
1685 dev_err(&urb->dev->dev,
1686 "%s - Unknown Interrupt code from UMP %x\n",
1687 __func__, data[1]);
1688 break;
1689
1690 }
1691
1692 exit:
1693 retval = usb_submit_urb(urb, GFP_ATOMIC);
1694 if (retval)
1695 dev_err(&urb->dev->dev,
1696 "%s - usb_submit_urb failed with result %d\n",
1697 __func__, retval);
1698 }
1699
1700 static void edge_bulk_in_callback(struct urb *urb)
1701 {
1702 struct edgeport_port *edge_port = urb->context;
1703 unsigned char *data = urb->transfer_buffer;
1704 struct tty_struct *tty;
1705 int retval = 0;
1706 int port_number;
1707 int status = urb->status;
1708
1709 dbg("%s", __func__);
1710
1711 switch (status) {
1712 case 0:
1713 /* success */
1714 break;
1715 case -ECONNRESET:
1716 case -ENOENT:
1717 case -ESHUTDOWN:
1718 /* this urb is terminated, clean up */
1719 dbg("%s - urb shutting down with status: %d",
1720 __func__, status);
1721 return;
1722 default:
1723 dev_err(&urb->dev->dev,
1724 "%s - nonzero read bulk status received: %d\n",
1725 __func__, status);
1726 }
1727
1728 if (status == -EPIPE)
1729 goto exit;
1730
1731 if (status) {
1732 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1733 return;
1734 }
1735
1736 port_number = edge_port->port->number - edge_port->port->serial->minor;
1737
1738 if (edge_port->lsr_event) {
1739 edge_port->lsr_event = 0;
1740 dbg("%s ===== Port %u LSR Status = %02x, Data = %02x ======",
1741 __func__, port_number, edge_port->lsr_mask, *data);
1742 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1743 /* Adjust buffer length/pointer */
1744 --urb->actual_length;
1745 ++data;
1746 }
1747
1748 tty = tty_port_tty_get(&edge_port->port->port);
1749 if (tty && urb->actual_length) {
1750 usb_serial_debug_data(debug, &edge_port->port->dev,
1751 __func__, urb->actual_length, data);
1752 if (edge_port->close_pending)
1753 dbg("%s - close pending, dropping data on the floor",
1754 __func__);
1755 else
1756 edge_tty_recv(&edge_port->port->dev, tty, data,
1757 urb->actual_length);
1758 edge_port->icount.rx += urb->actual_length;
1759 }
1760 tty_kref_put(tty);
1761
1762 exit:
1763 /* continue read unless stopped */
1764 spin_lock(&edge_port->ep_lock);
1765 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1766 retval = usb_submit_urb(urb, GFP_ATOMIC);
1767 else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1768 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1769
1770 spin_unlock(&edge_port->ep_lock);
1771 if (retval)
1772 dev_err(&urb->dev->dev,
1773 "%s - usb_submit_urb failed with result %d\n",
1774 __func__, retval);
1775 }
1776
1777 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
1778 unsigned char *data, int length)
1779 {
1780 int queued;
1781
1782 queued = tty_insert_flip_string(tty, data, length);
1783 if (queued < length)
1784 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1785 __func__, length - queued);
1786 tty_flip_buffer_push(tty);
1787 }
1788
1789 static void edge_bulk_out_callback(struct urb *urb)
1790 {
1791 struct usb_serial_port *port = urb->context;
1792 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1793 int status = urb->status;
1794 struct tty_struct *tty;
1795
1796 dbg("%s - port %d", __func__, port->number);
1797
1798 edge_port->ep_write_urb_in_use = 0;
1799
1800 switch (status) {
1801 case 0:
1802 /* success */
1803 break;
1804 case -ECONNRESET:
1805 case -ENOENT:
1806 case -ESHUTDOWN:
1807 /* this urb is terminated, clean up */
1808 dbg("%s - urb shutting down with status: %d",
1809 __func__, status);
1810 return;
1811 default:
1812 dev_err_console(port, "%s - nonzero write bulk status "
1813 "received: %d\n", __func__, status);
1814 }
1815
1816 /* send any buffered data */
1817 tty = tty_port_tty_get(&port->port);
1818 edge_send(tty);
1819 tty_kref_put(tty);
1820 }
1821
1822 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1823 {
1824 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1825 struct edgeport_serial *edge_serial;
1826 struct usb_device *dev;
1827 struct urb *urb;
1828 int port_number;
1829 int status;
1830 u16 open_settings;
1831 u8 transaction_timeout;
1832
1833 dbg("%s - port %d", __func__, port->number);
1834
1835 if (edge_port == NULL)
1836 return -ENODEV;
1837
1838 port_number = port->number - port->serial->minor;
1839 switch (port_number) {
1840 case 0:
1841 edge_port->uart_base = UMPMEM_BASE_UART1;
1842 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
1843 break;
1844 case 1:
1845 edge_port->uart_base = UMPMEM_BASE_UART2;
1846 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
1847 break;
1848 default:
1849 dev_err(&port->dev, "Unknown port number!!!\n");
1850 return -ENODEV;
1851 }
1852
1853 dbg("%s - port_number = %d, uart_base = %04x, dma_address = %04x",
1854 __func__, port_number, edge_port->uart_base,
1855 edge_port->dma_address);
1856
1857 dev = port->serial->dev;
1858
1859 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1860 init_waitqueue_head(&edge_port->delta_msr_wait);
1861
1862 /* turn off loopback */
1863 status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1864 if (status) {
1865 dev_err(&port->dev,
1866 "%s - cannot send clear loopback command, %d\n",
1867 __func__, status);
1868 return status;
1869 }
1870
1871 /* set up the port settings */
1872 if (tty)
1873 edge_set_termios(tty, port, tty->termios);
1874
1875 /* open up the port */
1876
1877 /* milliseconds to timeout for DMA transfer */
1878 transaction_timeout = 2;
1879
1880 edge_port->ump_read_timeout =
1881 max(20, ((transaction_timeout * 3) / 2));
1882
1883 /* milliseconds to timeout for DMA transfer */
1884 open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1885 UMP_PIPE_TRANS_TIMEOUT_ENA |
1886 (transaction_timeout << 2));
1887
1888 dbg("%s - Sending UMPC_OPEN_PORT", __func__);
1889
1890 /* Tell TI to open and start the port */
1891 status = send_cmd(dev, UMPC_OPEN_PORT,
1892 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1893 if (status) {
1894 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1895 __func__, status);
1896 return status;
1897 }
1898
1899 /* Start the DMA? */
1900 status = send_cmd(dev, UMPC_START_PORT,
1901 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1902 if (status) {
1903 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1904 __func__, status);
1905 return status;
1906 }
1907
1908 /* Clear TX and RX buffers in UMP */
1909 status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1910 if (status) {
1911 dev_err(&port->dev,
1912 "%s - cannot send clear buffers command, %d\n",
1913 __func__, status);
1914 return status;
1915 }
1916
1917 /* Read Initial MSR */
1918 status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1919 (__u16)(UMPM_UART1_PORT + port_number),
1920 &edge_port->shadow_msr, 1);
1921 if (status) {
1922 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1923 __func__, status);
1924 return status;
1925 }
1926
1927 dbg("ShadowMSR 0x%X", edge_port->shadow_msr);
1928
1929 /* Set Initial MCR */
1930 edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1931 dbg("ShadowMCR 0x%X", edge_port->shadow_mcr);
1932
1933 edge_serial = edge_port->edge_serial;
1934 if (mutex_lock_interruptible(&edge_serial->es_lock))
1935 return -ERESTARTSYS;
1936 if (edge_serial->num_ports_open == 0) {
1937 /* we are the first port to open, post the interrupt urb */
1938 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1939 if (!urb) {
1940 dev_err(&port->dev,
1941 "%s - no interrupt urb present, exiting\n",
1942 __func__);
1943 status = -EINVAL;
1944 goto release_es_lock;
1945 }
1946 urb->context = edge_serial;
1947 status = usb_submit_urb(urb, GFP_KERNEL);
1948 if (status) {
1949 dev_err(&port->dev,
1950 "%s - usb_submit_urb failed with value %d\n",
1951 __func__, status);
1952 goto release_es_lock;
1953 }
1954 }
1955
1956 /*
1957 * reset the data toggle on the bulk endpoints to work around bug in
1958 * host controllers where things get out of sync some times
1959 */
1960 usb_clear_halt(dev, port->write_urb->pipe);
1961 usb_clear_halt(dev, port->read_urb->pipe);
1962
1963 /* start up our bulk read urb */
1964 urb = port->read_urb;
1965 if (!urb) {
1966 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1967 __func__);
1968 status = -EINVAL;
1969 goto unlink_int_urb;
1970 }
1971 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1972 urb->context = edge_port;
1973 status = usb_submit_urb(urb, GFP_KERNEL);
1974 if (status) {
1975 dev_err(&port->dev,
1976 "%s - read bulk usb_submit_urb failed with value %d\n",
1977 __func__, status);
1978 goto unlink_int_urb;
1979 }
1980
1981 ++edge_serial->num_ports_open;
1982
1983 dbg("%s - exited", __func__);
1984
1985 goto release_es_lock;
1986
1987 unlink_int_urb:
1988 if (edge_port->edge_serial->num_ports_open == 0)
1989 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1990 release_es_lock:
1991 mutex_unlock(&edge_serial->es_lock);
1992 return status;
1993 }
1994
1995 static void edge_close(struct usb_serial_port *port)
1996 {
1997 struct edgeport_serial *edge_serial;
1998 struct edgeport_port *edge_port;
1999 struct usb_serial *serial = port->serial;
2000 int port_number;
2001
2002 dbg("%s - port %d", __func__, port->number);
2003
2004 edge_serial = usb_get_serial_data(port->serial);
2005 edge_port = usb_get_serial_port_data(port);
2006 if (edge_serial == NULL || edge_port == NULL)
2007 return;
2008
2009 /* The bulkreadcompletion routine will check
2010 * this flag and dump add read data */
2011 edge_port->close_pending = 1;
2012
2013 /* chase the port close and flush */
2014 chase_port(edge_port, (HZ * closing_wait) / 100, 1);
2015
2016 usb_kill_urb(port->read_urb);
2017 usb_kill_urb(port->write_urb);
2018 edge_port->ep_write_urb_in_use = 0;
2019
2020 /* assuming we can still talk to the device,
2021 * send a close port command to it */
2022 dbg("%s - send umpc_close_port", __func__);
2023 port_number = port->number - port->serial->minor;
2024
2025 mutex_lock(&serial->disc_mutex);
2026 if (!serial->disconnected) {
2027 send_cmd(serial->dev,
2028 UMPC_CLOSE_PORT,
2029 (__u8)(UMPM_UART1_PORT + port_number),
2030 0,
2031 NULL,
2032 0);
2033 }
2034 mutex_unlock(&serial->disc_mutex);
2035
2036 mutex_lock(&edge_serial->es_lock);
2037 --edge_port->edge_serial->num_ports_open;
2038 if (edge_port->edge_serial->num_ports_open <= 0) {
2039 /* last port is now closed, let's shut down our interrupt urb */
2040 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2041 edge_port->edge_serial->num_ports_open = 0;
2042 }
2043 mutex_unlock(&edge_serial->es_lock);
2044 edge_port->close_pending = 0;
2045
2046 dbg("%s - exited", __func__);
2047 }
2048
2049 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
2050 const unsigned char *data, int count)
2051 {
2052 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2053
2054 dbg("%s - port %d", __func__, port->number);
2055
2056 if (count == 0) {
2057 dbg("%s - write request of 0 bytes", __func__);
2058 return 0;
2059 }
2060
2061 if (edge_port == NULL)
2062 return -ENODEV;
2063 if (edge_port->close_pending == 1)
2064 return -ENODEV;
2065
2066 count = kfifo_in_locked(&edge_port->write_fifo, data, count,
2067 &edge_port->ep_lock);
2068 edge_send(tty);
2069
2070 return count;
2071 }
2072
2073 static void edge_send(struct tty_struct *tty)
2074 {
2075 struct usb_serial_port *port = tty->driver_data;
2076 int count, result;
2077 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2078 unsigned long flags;
2079
2080
2081 dbg("%s - port %d", __func__, port->number);
2082
2083 spin_lock_irqsave(&edge_port->ep_lock, flags);
2084
2085 if (edge_port->ep_write_urb_in_use) {
2086 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2087 return;
2088 }
2089
2090 count = kfifo_out(&edge_port->write_fifo,
2091 port->write_urb->transfer_buffer,
2092 port->bulk_out_size);
2093
2094 if (count == 0) {
2095 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2096 return;
2097 }
2098
2099 edge_port->ep_write_urb_in_use = 1;
2100
2101 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2102
2103 usb_serial_debug_data(debug, &port->dev, __func__, count,
2104 port->write_urb->transfer_buffer);
2105
2106 /* set up our urb */
2107 port->write_urb->transfer_buffer_length = count;
2108
2109 /* send the data out the bulk port */
2110 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2111 if (result) {
2112 dev_err_console(port,
2113 "%s - failed submitting write urb, error %d\n",
2114 __func__, result);
2115 edge_port->ep_write_urb_in_use = 0;
2116 /* TODO: reschedule edge_send */
2117 } else
2118 edge_port->icount.tx += count;
2119
2120 /* wakeup any process waiting for writes to complete */
2121 /* there is now more room in the buffer for new writes */
2122 if (tty)
2123 tty_wakeup(tty);
2124 }
2125
2126 static int edge_write_room(struct tty_struct *tty)
2127 {
2128 struct usb_serial_port *port = tty->driver_data;
2129 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2130 int room = 0;
2131 unsigned long flags;
2132
2133 dbg("%s - port %d", __func__, port->number);
2134
2135 if (edge_port == NULL)
2136 return 0;
2137 if (edge_port->close_pending == 1)
2138 return 0;
2139
2140 spin_lock_irqsave(&edge_port->ep_lock, flags);
2141 room = kfifo_avail(&edge_port->write_fifo);
2142 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2143
2144 dbg("%s - returns %d", __func__, room);
2145 return room;
2146 }
2147
2148 static int edge_chars_in_buffer(struct tty_struct *tty)
2149 {
2150 struct usb_serial_port *port = tty->driver_data;
2151 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2152 int chars = 0;
2153 unsigned long flags;
2154
2155 dbg("%s - port %d", __func__, port->number);
2156
2157 if (edge_port == NULL)
2158 return 0;
2159 if (edge_port->close_pending == 1)
2160 return 0;
2161
2162 spin_lock_irqsave(&edge_port->ep_lock, flags);
2163 chars = kfifo_len(&edge_port->write_fifo);
2164 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2165
2166 dbg("%s - returns %d", __func__, chars);
2167 return chars;
2168 }
2169
2170 static void edge_throttle(struct tty_struct *tty)
2171 {
2172 struct usb_serial_port *port = tty->driver_data;
2173 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2174 int status;
2175
2176 dbg("%s - port %d", __func__, port->number);
2177
2178 if (edge_port == NULL)
2179 return;
2180
2181 /* if we are implementing XON/XOFF, send the stop character */
2182 if (I_IXOFF(tty)) {
2183 unsigned char stop_char = STOP_CHAR(tty);
2184 status = edge_write(tty, port, &stop_char, 1);
2185 if (status <= 0) {
2186 dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2187 }
2188 }
2189
2190 /* if we are implementing RTS/CTS, stop reads */
2191 /* and the Edgeport will clear the RTS line */
2192 if (C_CRTSCTS(tty))
2193 stop_read(edge_port);
2194
2195 }
2196
2197 static void edge_unthrottle(struct tty_struct *tty)
2198 {
2199 struct usb_serial_port *port = tty->driver_data;
2200 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2201 int status;
2202
2203 dbg("%s - port %d", __func__, port->number);
2204
2205 if (edge_port == NULL)
2206 return;
2207
2208 /* if we are implementing XON/XOFF, send the start character */
2209 if (I_IXOFF(tty)) {
2210 unsigned char start_char = START_CHAR(tty);
2211 status = edge_write(tty, port, &start_char, 1);
2212 if (status <= 0) {
2213 dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2214 }
2215 }
2216 /* if we are implementing RTS/CTS, restart reads */
2217 /* are the Edgeport will assert the RTS line */
2218 if (C_CRTSCTS(tty)) {
2219 status = restart_read(edge_port);
2220 if (status)
2221 dev_err(&port->dev,
2222 "%s - read bulk usb_submit_urb failed: %d\n",
2223 __func__, status);
2224 }
2225
2226 }
2227
2228 static void stop_read(struct edgeport_port *edge_port)
2229 {
2230 unsigned long flags;
2231
2232 spin_lock_irqsave(&edge_port->ep_lock, flags);
2233
2234 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2235 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2236 edge_port->shadow_mcr &= ~MCR_RTS;
2237
2238 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2239 }
2240
2241 static int restart_read(struct edgeport_port *edge_port)
2242 {
2243 struct urb *urb;
2244 int status = 0;
2245 unsigned long flags;
2246
2247 spin_lock_irqsave(&edge_port->ep_lock, flags);
2248
2249 if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2250 urb = edge_port->port->read_urb;
2251 status = usb_submit_urb(urb, GFP_ATOMIC);
2252 }
2253 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2254 edge_port->shadow_mcr |= MCR_RTS;
2255
2256 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2257
2258 return status;
2259 }
2260
2261 static void change_port_settings(struct tty_struct *tty,
2262 struct edgeport_port *edge_port, struct ktermios *old_termios)
2263 {
2264 struct ump_uart_config *config;
2265 int baud;
2266 unsigned cflag;
2267 int status;
2268 int port_number = edge_port->port->number -
2269 edge_port->port->serial->minor;
2270
2271 dbg("%s - port %d", __func__, edge_port->port->number);
2272
2273 config = kmalloc (sizeof (*config), GFP_KERNEL);
2274 if (!config) {
2275 *tty->termios = *old_termios;
2276 dev_err(&edge_port->port->dev, "%s - out of memory\n",
2277 __func__);
2278 return;
2279 }
2280
2281 cflag = tty->termios->c_cflag;
2282
2283 config->wFlags = 0;
2284
2285 /* These flags must be set */
2286 config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2287 config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2288 config->bUartMode = (__u8)(edge_port->bUartMode);
2289
2290 switch (cflag & CSIZE) {
2291 case CS5:
2292 config->bDataBits = UMP_UART_CHAR5BITS;
2293 dbg("%s - data bits = 5", __func__);
2294 break;
2295 case CS6:
2296 config->bDataBits = UMP_UART_CHAR6BITS;
2297 dbg("%s - data bits = 6", __func__);
2298 break;
2299 case CS7:
2300 config->bDataBits = UMP_UART_CHAR7BITS;
2301 dbg("%s - data bits = 7", __func__);
2302 break;
2303 default:
2304 case CS8:
2305 config->bDataBits = UMP_UART_CHAR8BITS;
2306 dbg("%s - data bits = 8", __func__);
2307 break;
2308 }
2309
2310 if (cflag & PARENB) {
2311 if (cflag & PARODD) {
2312 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2313 config->bParity = UMP_UART_ODDPARITY;
2314 dbg("%s - parity = odd", __func__);
2315 } else {
2316 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2317 config->bParity = UMP_UART_EVENPARITY;
2318 dbg("%s - parity = even", __func__);
2319 }
2320 } else {
2321 config->bParity = UMP_UART_NOPARITY;
2322 dbg("%s - parity = none", __func__);
2323 }
2324
2325 if (cflag & CSTOPB) {
2326 config->bStopBits = UMP_UART_STOPBIT2;
2327 dbg("%s - stop bits = 2", __func__);
2328 } else {
2329 config->bStopBits = UMP_UART_STOPBIT1;
2330 dbg("%s - stop bits = 1", __func__);
2331 }
2332
2333 /* figure out the flow control settings */
2334 if (cflag & CRTSCTS) {
2335 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2336 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2337 dbg("%s - RTS/CTS is enabled", __func__);
2338 } else {
2339 dbg("%s - RTS/CTS is disabled", __func__);
2340 tty->hw_stopped = 0;
2341 restart_read(edge_port);
2342 }
2343
2344 /* if we are implementing XON/XOFF, set the start and stop
2345 character in the device */
2346 config->cXon = START_CHAR(tty);
2347 config->cXoff = STOP_CHAR(tty);
2348
2349 /* if we are implementing INBOUND XON/XOFF */
2350 if (I_IXOFF(tty)) {
2351 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2352 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2353 __func__, config->cXon, config->cXoff);
2354 } else
2355 dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2356
2357 /* if we are implementing OUTBOUND XON/XOFF */
2358 if (I_IXON(tty)) {
2359 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2360 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2361 __func__, config->cXon, config->cXoff);
2362 } else
2363 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2364
2365 tty->termios->c_cflag &= ~CMSPAR;
2366
2367 /* Round the baud rate */
2368 baud = tty_get_baud_rate(tty);
2369 if (!baud) {
2370 /* pick a default, any default... */
2371 baud = 9600;
2372 } else
2373 tty_encode_baud_rate(tty, baud, baud);
2374
2375 edge_port->baud_rate = baud;
2376 config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2377
2378 /* FIXME: Recompute actual baud from divisor here */
2379
2380 dbg("%s - baud rate = %d, wBaudRate = %d", __func__, baud,
2381 config->wBaudRate);
2382
2383 dbg("wBaudRate: %d", (int)(461550L / config->wBaudRate));
2384 dbg("wFlags: 0x%x", config->wFlags);
2385 dbg("bDataBits: %d", config->bDataBits);
2386 dbg("bParity: %d", config->bParity);
2387 dbg("bStopBits: %d", config->bStopBits);
2388 dbg("cXon: %d", config->cXon);
2389 dbg("cXoff: %d", config->cXoff);
2390 dbg("bUartMode: %d", config->bUartMode);
2391
2392 /* move the word values into big endian mode */
2393 cpu_to_be16s(&config->wFlags);
2394 cpu_to_be16s(&config->wBaudRate);
2395
2396 status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2397 (__u8)(UMPM_UART1_PORT + port_number),
2398 0, (__u8 *)config, sizeof(*config));
2399 if (status)
2400 dbg("%s - error %d when trying to write config to device",
2401 __func__, status);
2402 kfree(config);
2403 }
2404
2405 static void edge_set_termios(struct tty_struct *tty,
2406 struct usb_serial_port *port, struct ktermios *old_termios)
2407 {
2408 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2409 unsigned int cflag;
2410
2411 cflag = tty->termios->c_cflag;
2412
2413 dbg("%s - clfag %08x iflag %08x", __func__,
2414 tty->termios->c_cflag, tty->termios->c_iflag);
2415 dbg("%s - old clfag %08x old iflag %08x", __func__,
2416 old_termios->c_cflag, old_termios->c_iflag);
2417 dbg("%s - port %d", __func__, port->number);
2418
2419 if (edge_port == NULL)
2420 return;
2421 /* change the port settings to the new ones specified */
2422 change_port_settings(tty, edge_port, old_termios);
2423 }
2424
2425 static int edge_tiocmset(struct tty_struct *tty,
2426 unsigned int set, unsigned int clear)
2427 {
2428 struct usb_serial_port *port = tty->driver_data;
2429 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2430 unsigned int mcr;
2431 unsigned long flags;
2432
2433 dbg("%s - port %d", __func__, port->number);
2434
2435 spin_lock_irqsave(&edge_port->ep_lock, flags);
2436 mcr = edge_port->shadow_mcr;
2437 if (set & TIOCM_RTS)
2438 mcr |= MCR_RTS;
2439 if (set & TIOCM_DTR)
2440 mcr |= MCR_DTR;
2441 if (set & TIOCM_LOOP)
2442 mcr |= MCR_LOOPBACK;
2443
2444 if (clear & TIOCM_RTS)
2445 mcr &= ~MCR_RTS;
2446 if (clear & TIOCM_DTR)
2447 mcr &= ~MCR_DTR;
2448 if (clear & TIOCM_LOOP)
2449 mcr &= ~MCR_LOOPBACK;
2450
2451 edge_port->shadow_mcr = mcr;
2452 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2453
2454 restore_mcr(edge_port, mcr);
2455 return 0;
2456 }
2457
2458 static int edge_tiocmget(struct tty_struct *tty)
2459 {
2460 struct usb_serial_port *port = tty->driver_data;
2461 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2462 unsigned int result = 0;
2463 unsigned int msr;
2464 unsigned int mcr;
2465 unsigned long flags;
2466
2467 dbg("%s - port %d", __func__, port->number);
2468
2469 spin_lock_irqsave(&edge_port->ep_lock, flags);
2470
2471 msr = edge_port->shadow_msr;
2472 mcr = edge_port->shadow_mcr;
2473 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
2474 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
2475 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
2476 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
2477 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
2478 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
2479
2480
2481 dbg("%s -- %x", __func__, result);
2482 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2483
2484 return result;
2485 }
2486
2487 static int edge_get_icount(struct tty_struct *tty,
2488 struct serial_icounter_struct *icount)
2489 {
2490 struct usb_serial_port *port = tty->driver_data;
2491 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2492 struct async_icount *ic = &edge_port->icount;
2493
2494 icount->cts = ic->cts;
2495 icount->dsr = ic->dsr;
2496 icount->rng = ic->rng;
2497 icount->dcd = ic->dcd;
2498 icount->tx = ic->tx;
2499 icount->rx = ic->rx;
2500 icount->frame = ic->frame;
2501 icount->parity = ic->parity;
2502 icount->overrun = ic->overrun;
2503 icount->brk = ic->brk;
2504 icount->buf_overrun = ic->buf_overrun;
2505 return 0;
2506 }
2507
2508 static int get_serial_info(struct edgeport_port *edge_port,
2509 struct serial_struct __user *retinfo)
2510 {
2511 struct serial_struct tmp;
2512
2513 if (!retinfo)
2514 return -EFAULT;
2515
2516 memset(&tmp, 0, sizeof(tmp));
2517
2518 tmp.type = PORT_16550A;
2519 tmp.line = edge_port->port->serial->minor;
2520 tmp.port = edge_port->port->number;
2521 tmp.irq = 0;
2522 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2523 tmp.xmit_fifo_size = edge_port->port->bulk_out_size;
2524 tmp.baud_base = 9600;
2525 tmp.close_delay = 5*HZ;
2526 tmp.closing_wait = closing_wait;
2527
2528 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2529 return -EFAULT;
2530 return 0;
2531 }
2532
2533 static int edge_ioctl(struct tty_struct *tty,
2534 unsigned int cmd, unsigned long arg)
2535 {
2536 struct usb_serial_port *port = tty->driver_data;
2537 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2538 struct async_icount cnow;
2539 struct async_icount cprev;
2540
2541 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2542
2543 switch (cmd) {
2544 case TIOCGSERIAL:
2545 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
2546 return get_serial_info(edge_port,
2547 (struct serial_struct __user *) arg);
2548 case TIOCMIWAIT:
2549 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
2550 cprev = edge_port->icount;
2551 while (1) {
2552 interruptible_sleep_on(&edge_port->delta_msr_wait);
2553 /* see if a signal did it */
2554 if (signal_pending(current))
2555 return -ERESTARTSYS;
2556 cnow = edge_port->icount;
2557 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2558 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2559 return -EIO; /* no change => error */
2560 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2561 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2562 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2563 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2564 return 0;
2565 }
2566 cprev = cnow;
2567 }
2568 /* not reached */
2569 break;
2570 }
2571 return -ENOIOCTLCMD;
2572 }
2573
2574 static void edge_break(struct tty_struct *tty, int break_state)
2575 {
2576 struct usb_serial_port *port = tty->driver_data;
2577 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2578 int status;
2579 int bv = 0; /* Off */
2580
2581 dbg("%s - state = %d", __func__, break_state);
2582
2583 /* chase the port close */
2584 chase_port(edge_port, 0, 0);
2585
2586 if (break_state == -1)
2587 bv = 1; /* On */
2588 status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2589 if (status)
2590 dbg("%s - error %d sending break set/clear command.",
2591 __func__, status);
2592 }
2593
2594 static int edge_startup(struct usb_serial *serial)
2595 {
2596 struct edgeport_serial *edge_serial;
2597 int status;
2598
2599 /* create our private serial structure */
2600 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2601 if (edge_serial == NULL) {
2602 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2603 return -ENOMEM;
2604 }
2605 mutex_init(&edge_serial->es_lock);
2606 edge_serial->serial = serial;
2607 usb_set_serial_data(serial, edge_serial);
2608
2609 status = download_fw(edge_serial);
2610 if (status) {
2611 kfree(edge_serial);
2612 return status;
2613 }
2614
2615 return 0;
2616 }
2617
2618 static void edge_disconnect(struct usb_serial *serial)
2619 {
2620 dbg("%s", __func__);
2621 }
2622
2623 static void edge_release(struct usb_serial *serial)
2624 {
2625 kfree(usb_get_serial_data(serial));
2626 }
2627
2628 static int edge_port_probe(struct usb_serial_port *port)
2629 {
2630 struct edgeport_port *edge_port;
2631 int ret;
2632
2633 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2634 if (!edge_port)
2635 return -ENOMEM;
2636
2637 ret = kfifo_alloc(&edge_port->write_fifo, EDGE_OUT_BUF_SIZE,
2638 GFP_KERNEL);
2639 if (ret) {
2640 kfree(edge_port);
2641 return -ENOMEM;
2642 }
2643
2644 spin_lock_init(&edge_port->ep_lock);
2645 edge_port->port = port;
2646 edge_port->edge_serial = usb_get_serial_data(port->serial);
2647 edge_port->bUartMode = default_uart_mode;
2648
2649 usb_set_serial_port_data(port, edge_port);
2650
2651 ret = edge_create_sysfs_attrs(port);
2652 if (ret) {
2653 kfifo_free(&edge_port->write_fifo);
2654 kfree(edge_port);
2655 return ret;
2656 }
2657
2658 return 0;
2659 }
2660
2661 static int edge_port_remove(struct usb_serial_port *port)
2662 {
2663 struct edgeport_port *edge_port;
2664
2665 edge_port = usb_get_serial_port_data(port);
2666
2667 edge_remove_sysfs_attrs(port);
2668 kfifo_free(&edge_port->write_fifo);
2669 kfree(edge_port);
2670
2671 return 0;
2672 }
2673
2674 /* Sysfs Attributes */
2675
2676 static ssize_t show_uart_mode(struct device *dev,
2677 struct device_attribute *attr, char *buf)
2678 {
2679 struct usb_serial_port *port = to_usb_serial_port(dev);
2680 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2681
2682 return sprintf(buf, "%d\n", edge_port->bUartMode);
2683 }
2684
2685 static ssize_t store_uart_mode(struct device *dev,
2686 struct device_attribute *attr, const char *valbuf, size_t count)
2687 {
2688 struct usb_serial_port *port = to_usb_serial_port(dev);
2689 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2690 unsigned int v = simple_strtoul(valbuf, NULL, 0);
2691
2692 dbg("%s: setting uart_mode = %d", __func__, v);
2693
2694 if (v < 256)
2695 edge_port->bUartMode = v;
2696 else
2697 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2698
2699 return count;
2700 }
2701
2702 static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode,
2703 store_uart_mode);
2704
2705 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2706 {
2707 return device_create_file(&port->dev, &dev_attr_uart_mode);
2708 }
2709
2710 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2711 {
2712 device_remove_file(&port->dev, &dev_attr_uart_mode);
2713 return 0;
2714 }
2715
2716
2717 static struct usb_serial_driver edgeport_1port_device = {
2718 .driver = {
2719 .owner = THIS_MODULE,
2720 .name = "edgeport_ti_1",
2721 },
2722 .description = "Edgeport TI 1 port adapter",
2723 .id_table = edgeport_1port_id_table,
2724 .num_ports = 1,
2725 .open = edge_open,
2726 .close = edge_close,
2727 .throttle = edge_throttle,
2728 .unthrottle = edge_unthrottle,
2729 .attach = edge_startup,
2730 .disconnect = edge_disconnect,
2731 .release = edge_release,
2732 .port_probe = edge_port_probe,
2733 .port_remove = edge_port_remove,
2734 .ioctl = edge_ioctl,
2735 .set_termios = edge_set_termios,
2736 .tiocmget = edge_tiocmget,
2737 .tiocmset = edge_tiocmset,
2738 .get_icount = edge_get_icount,
2739 .write = edge_write,
2740 .write_room = edge_write_room,
2741 .chars_in_buffer = edge_chars_in_buffer,
2742 .break_ctl = edge_break,
2743 .read_int_callback = edge_interrupt_callback,
2744 .read_bulk_callback = edge_bulk_in_callback,
2745 .write_bulk_callback = edge_bulk_out_callback,
2746 };
2747
2748 static struct usb_serial_driver edgeport_2port_device = {
2749 .driver = {
2750 .owner = THIS_MODULE,
2751 .name = "edgeport_ti_2",
2752 },
2753 .description = "Edgeport TI 2 port adapter",
2754 .id_table = edgeport_2port_id_table,
2755 .num_ports = 2,
2756 .open = edge_open,
2757 .close = edge_close,
2758 .throttle = edge_throttle,
2759 .unthrottle = edge_unthrottle,
2760 .attach = edge_startup,
2761 .disconnect = edge_disconnect,
2762 .release = edge_release,
2763 .port_probe = edge_port_probe,
2764 .port_remove = edge_port_remove,
2765 .ioctl = edge_ioctl,
2766 .set_termios = edge_set_termios,
2767 .tiocmget = edge_tiocmget,
2768 .tiocmset = edge_tiocmset,
2769 .write = edge_write,
2770 .write_room = edge_write_room,
2771 .chars_in_buffer = edge_chars_in_buffer,
2772 .break_ctl = edge_break,
2773 .read_int_callback = edge_interrupt_callback,
2774 .read_bulk_callback = edge_bulk_in_callback,
2775 .write_bulk_callback = edge_bulk_out_callback,
2776 };
2777
2778 static struct usb_serial_driver * const serial_drivers[] = {
2779 &edgeport_1port_device, &edgeport_2port_device, NULL
2780 };
2781
2782 module_usb_serial_driver(serial_drivers, id_table_combined);
2783
2784 MODULE_AUTHOR(DRIVER_AUTHOR);
2785 MODULE_DESCRIPTION(DRIVER_DESC);
2786 MODULE_LICENSE("GPL");
2787 MODULE_FIRMWARE("edgeport/down3.bin");
2788
2789 module_param(debug, bool, S_IRUGO | S_IWUSR);
2790 MODULE_PARM_DESC(debug, "Debug enabled or not");
2791
2792 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2793 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2794
2795 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2796 MODULE_PARM_DESC(ignore_cpu_rev,
2797 "Ignore the cpu revision when connecting to a device");
2798
2799 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
2800 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
Linux ARM platform port for MOXA ART SoC