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USB: serial: remove unnecessary bulk-urb re-fills
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / usb / serial / io_ti.c
blobe44d375edaad2a785eacd7eabcfbba5d03cc26e3
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 struct usb_driver io_driver = {
201 .name = "io_ti",
202 .probe = usb_serial_probe,
203 .disconnect = usb_serial_disconnect,
204 .id_table = id_table_combined,
205 .no_dynamic_id = 1,
206 };
207
208
209 static unsigned char OperationalMajorVersion;
210 static unsigned char OperationalMinorVersion;
211 static unsigned short OperationalBuildNumber;
212
213 static int debug;
214
215 static int closing_wait = EDGE_CLOSING_WAIT;
216 static int ignore_cpu_rev;
217 static int default_uart_mode; /* RS232 */
218
219 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
220 unsigned char *data, int length);
221
222 static void stop_read(struct edgeport_port *edge_port);
223 static int restart_read(struct edgeport_port *edge_port);
224
225 static void edge_set_termios(struct tty_struct *tty,
226 struct usb_serial_port *port, struct ktermios *old_termios);
227 static void edge_send(struct tty_struct *tty);
228
229 /* sysfs attributes */
230 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
231 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
232
233
234 static int ti_vread_sync(struct usb_device *dev, __u8 request,
235 __u16 value, __u16 index, u8 *data, int size)
236 {
237 int status;
238
239 status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
240 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
241 value, index, data, size, 1000);
242 if (status < 0)
243 return status;
244 if (status != size) {
245 dbg("%s - wanted to write %d, but only wrote %d",
246 __func__, size, status);
247 return -ECOMM;
248 }
249 return 0;
250 }
251
252 static int ti_vsend_sync(struct usb_device *dev, __u8 request,
253 __u16 value, __u16 index, u8 *data, int size)
254 {
255 int status;
256
257 status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
258 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
259 value, index, data, size, 1000);
260 if (status < 0)
261 return status;
262 if (status != size) {
263 dbg("%s - wanted to write %d, but only wrote %d",
264 __func__, size, status);
265 return -ECOMM;
266 }
267 return 0;
268 }
269
270 static int send_cmd(struct usb_device *dev, __u8 command,
271 __u8 moduleid, __u16 value, u8 *data,
272 int size)
273 {
274 return ti_vsend_sync(dev, command, value, moduleid, data, size);
275 }
276
277 /* clear tx/rx buffers and fifo in TI UMP */
278 static int purge_port(struct usb_serial_port *port, __u16 mask)
279 {
280 int port_number = port->number - port->serial->minor;
281
282 dbg("%s - port %d, mask %x", __func__, port_number, mask);
283
284 return send_cmd(port->serial->dev,
285 UMPC_PURGE_PORT,
286 (__u8)(UMPM_UART1_PORT + port_number),
287 mask,
288 NULL,
289 0);
290 }
291
292 /**
293 * read_download_mem - Read edgeport memory from TI chip
294 * @dev: usb device pointer
295 * @start_address: Device CPU address at which to read
296 * @length: Length of above data
297 * @address_type: Can read both XDATA and I2C
298 * @buffer: pointer to input data buffer
299 */
300 static int read_download_mem(struct usb_device *dev, int start_address,
301 int length, __u8 address_type, __u8 *buffer)
302 {
303 int status = 0;
304 __u8 read_length;
305 __be16 be_start_address;
306
307 dbg("%s - @ %x for %d", __func__, start_address, length);
308
309 /* Read in blocks of 64 bytes
310 * (TI firmware can't handle more than 64 byte reads)
311 */
312 while (length) {
313 if (length > 64)
314 read_length = 64;
315 else
316 read_length = (__u8)length;
317
318 if (read_length > 1) {
319 dbg("%s - @ %x for %d", __func__,
320 start_address, read_length);
321 }
322 be_start_address = cpu_to_be16(start_address);
323 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
324 (__u16)address_type,
325 (__force __u16)be_start_address,
326 buffer, read_length);
327
328 if (status) {
329 dbg("%s - ERROR %x", __func__, status);
330 return status;
331 }
332
333 if (read_length > 1)
334 usb_serial_debug_data(debug, &dev->dev, __func__,
335 read_length, buffer);
336
337 /* Update pointers/length */
338 start_address += read_length;
339 buffer += read_length;
340 length -= read_length;
341 }
342
343 return status;
344 }
345
346 static int read_ram(struct usb_device *dev, int start_address,
347 int length, __u8 *buffer)
348 {
349 return read_download_mem(dev, start_address, length,
350 DTK_ADDR_SPACE_XDATA, buffer);
351 }
352
353 /* Read edgeport memory to a given block */
354 static int read_boot_mem(struct edgeport_serial *serial,
355 int start_address, int length, __u8 *buffer)
356 {
357 int status = 0;
358 int i;
359
360 for (i = 0; i < length; i++) {
361 status = ti_vread_sync(serial->serial->dev,
362 UMPC_MEMORY_READ, serial->TI_I2C_Type,
363 (__u16)(start_address+i), &buffer[i], 0x01);
364 if (status) {
365 dbg("%s - ERROR %x", __func__, status);
366 return status;
367 }
368 }
369
370 dbg("%s - start_address = %x, length = %d",
371 __func__, start_address, length);
372 usb_serial_debug_data(debug, &serial->serial->dev->dev,
373 __func__, length, buffer);
374
375 serial->TiReadI2C = 1;
376
377 return status;
378 }
379
380 /* Write given block to TI EPROM memory */
381 static int write_boot_mem(struct edgeport_serial *serial,
382 int start_address, int length, __u8 *buffer)
383 {
384 int status = 0;
385 int i;
386 u8 *temp;
387
388 /* Must do a read before write */
389 if (!serial->TiReadI2C) {
390 temp = kmalloc(1, GFP_KERNEL);
391 if (!temp) {
392 dev_err(&serial->serial->dev->dev,
393 "%s - out of memory\n", __func__);
394 return -ENOMEM;
395 }
396 status = read_boot_mem(serial, 0, 1, temp);
397 kfree(temp);
398 if (status)
399 return status;
400 }
401
402 for (i = 0; i < length; ++i) {
403 status = ti_vsend_sync(serial->serial->dev,
404 UMPC_MEMORY_WRITE, buffer[i],
405 (__u16)(i + start_address), NULL, 0);
406 if (status)
407 return status;
408 }
409
410 dbg("%s - start_sddr = %x, length = %d",
411 __func__, start_address, length);
412 usb_serial_debug_data(debug, &serial->serial->dev->dev,
413 __func__, length, buffer);
414
415 return status;
416 }
417
418
419 /* Write edgeport I2C memory to TI chip */
420 static int write_i2c_mem(struct edgeport_serial *serial,
421 int start_address, int length, __u8 address_type, __u8 *buffer)
422 {
423 int status = 0;
424 int write_length;
425 __be16 be_start_address;
426
427 /* We can only send a maximum of 1 aligned byte page at a time */
428
429 /* calculate the number of bytes left in the first page */
430 write_length = EPROM_PAGE_SIZE -
431 (start_address & (EPROM_PAGE_SIZE - 1));
432
433 if (write_length > length)
434 write_length = length;
435
436 dbg("%s - BytesInFirstPage Addr = %x, length = %d",
437 __func__, start_address, write_length);
438 usb_serial_debug_data(debug, &serial->serial->dev->dev,
439 __func__, write_length, buffer);
440
441 /* Write first page */
442 be_start_address = cpu_to_be16(start_address);
443 status = ti_vsend_sync(serial->serial->dev,
444 UMPC_MEMORY_WRITE, (__u16)address_type,
445 (__force __u16)be_start_address,
446 buffer, write_length);
447 if (status) {
448 dbg("%s - ERROR %d", __func__, status);
449 return status;
450 }
451
452 length -= write_length;
453 start_address += write_length;
454 buffer += write_length;
455
456 /* We should be aligned now -- can write
457 max page size bytes at a time */
458 while (length) {
459 if (length > EPROM_PAGE_SIZE)
460 write_length = EPROM_PAGE_SIZE;
461 else
462 write_length = length;
463
464 dbg("%s - Page Write Addr = %x, length = %d",
465 __func__, start_address, write_length);
466 usb_serial_debug_data(debug, &serial->serial->dev->dev,
467 __func__, write_length, buffer);
468
469 /* Write next page */
470 be_start_address = cpu_to_be16(start_address);
471 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
472 (__u16)address_type,
473 (__force __u16)be_start_address,
474 buffer, write_length);
475 if (status) {
476 dev_err(&serial->serial->dev->dev, "%s - ERROR %d\n",
477 __func__, status);
478 return status;
479 }
480
481 length -= write_length;
482 start_address += write_length;
483 buffer += write_length;
484 }
485 return status;
486 }
487
488 /* Examine the UMP DMA registers and LSR
489 *
490 * Check the MSBit of the X and Y DMA byte count registers.
491 * A zero in this bit indicates that the TX DMA buffers are empty
492 * then check the TX Empty bit in the UART.
493 */
494 static int tx_active(struct edgeport_port *port)
495 {
496 int status;
497 struct out_endpoint_desc_block *oedb;
498 __u8 *lsr;
499 int bytes_left = 0;
500
501 oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
502 if (!oedb) {
503 dev_err(&port->port->dev, "%s - out of memory\n", __func__);
504 return -ENOMEM;
505 }
506
507 lsr = kmalloc(1, GFP_KERNEL); /* Sigh, that's right, just one byte,
508 as not all platforms can do DMA
509 from stack */
510 if (!lsr) {
511 kfree(oedb);
512 return -ENOMEM;
513 }
514 /* Read the DMA Count Registers */
515 status = read_ram(port->port->serial->dev, port->dma_address,
516 sizeof(*oedb), (void *)oedb);
517 if (status)
518 goto exit_is_tx_active;
519
520 dbg("%s - XByteCount 0x%X", __func__, oedb->XByteCount);
521
522 /* and the LSR */
523 status = read_ram(port->port->serial->dev,
524 port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
525
526 if (status)
527 goto exit_is_tx_active;
528 dbg("%s - LSR = 0x%X", __func__, *lsr);
529
530 /* If either buffer has data or we are transmitting then return TRUE */
531 if ((oedb->XByteCount & 0x80) != 0)
532 bytes_left += 64;
533
534 if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
535 bytes_left += 1;
536
537 /* We return Not Active if we get any kind of error */
538 exit_is_tx_active:
539 dbg("%s - return %d", __func__, bytes_left);
540
541 kfree(lsr);
542 kfree(oedb);
543 return bytes_left;
544 }
545
546 static void chase_port(struct edgeport_port *port, unsigned long timeout,
547 int flush)
548 {
549 int baud_rate;
550 struct tty_struct *tty = tty_port_tty_get(&port->port->port);
551 wait_queue_t wait;
552 unsigned long flags;
553
554 if (!timeout)
555 timeout = (HZ * EDGE_CLOSING_WAIT)/100;
556
557 /* wait for data to drain from the buffer */
558 spin_lock_irqsave(&port->ep_lock, flags);
559 init_waitqueue_entry(&wait, current);
560 add_wait_queue(&tty->write_wait, &wait);
561 for (;;) {
562 set_current_state(TASK_INTERRUPTIBLE);
563 if (kfifo_len(&port->write_fifo) == 0
564 || timeout == 0 || signal_pending(current)
565 || !usb_get_intfdata(port->port->serial->interface))
566 /* disconnect */
567 break;
568 spin_unlock_irqrestore(&port->ep_lock, flags);
569 timeout = schedule_timeout(timeout);
570 spin_lock_irqsave(&port->ep_lock, flags);
571 }
572 set_current_state(TASK_RUNNING);
573 remove_wait_queue(&tty->write_wait, &wait);
574 if (flush)
575 kfifo_reset_out(&port->write_fifo);
576 spin_unlock_irqrestore(&port->ep_lock, flags);
577 tty_kref_put(tty);
578
579 /* wait for data to drain from the device */
580 timeout += jiffies;
581 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
582 && usb_get_intfdata(port->port->serial->interface)) {
583 /* not disconnected */
584 if (!tx_active(port))
585 break;
586 msleep(10);
587 }
588
589 /* disconnected */
590 if (!usb_get_intfdata(port->port->serial->interface))
591 return;
592
593 /* wait one more character time, based on baud rate */
594 /* (tx_active doesn't seem to wait for the last byte) */
595 baud_rate = port->baud_rate;
596 if (baud_rate == 0)
597 baud_rate = 50;
598 msleep(max(1, DIV_ROUND_UP(10000, baud_rate)));
599 }
600
601 static int choose_config(struct usb_device *dev)
602 {
603 /*
604 * There may be multiple configurations on this device, in which case
605 * we would need to read and parse all of them to find out which one
606 * we want. However, we just support one config at this point,
607 * configuration # 1, which is Config Descriptor 0.
608 */
609
610 dbg("%s - Number of Interfaces = %d",
611 __func__, dev->config->desc.bNumInterfaces);
612 dbg("%s - MAX Power = %d",
613 __func__, dev->config->desc.bMaxPower * 2);
614
615 if (dev->config->desc.bNumInterfaces != 1) {
616 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n",
617 __func__);
618 return -ENODEV;
619 }
620
621 return 0;
622 }
623
624 static int read_rom(struct edgeport_serial *serial,
625 int start_address, int length, __u8 *buffer)
626 {
627 int status;
628
629 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
630 status = read_download_mem(serial->serial->dev,
631 start_address,
632 length,
633 serial->TI_I2C_Type,
634 buffer);
635 } else {
636 status = read_boot_mem(serial, start_address, length,
637 buffer);
638 }
639 return status;
640 }
641
642 static int write_rom(struct edgeport_serial *serial, int start_address,
643 int length, __u8 *buffer)
644 {
645 if (serial->product_info.TiMode == TI_MODE_BOOT)
646 return write_boot_mem(serial, start_address, length,
647 buffer);
648
649 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
650 return write_i2c_mem(serial, start_address, length,
651 serial->TI_I2C_Type, buffer);
652 return -EINVAL;
653 }
654
655
656
657 /* Read a descriptor header from I2C based on type */
658 static int get_descriptor_addr(struct edgeport_serial *serial,
659 int desc_type, struct ti_i2c_desc *rom_desc)
660 {
661 int start_address;
662 int status;
663
664 /* Search for requested descriptor in I2C */
665 start_address = 2;
666 do {
667 status = read_rom(serial,
668 start_address,
669 sizeof(struct ti_i2c_desc),
670 (__u8 *)rom_desc);
671 if (status)
672 return 0;
673
674 if (rom_desc->Type == desc_type)
675 return start_address;
676
677 start_address = start_address + sizeof(struct ti_i2c_desc)
678 + rom_desc->Size;
679
680 } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
681
682 return 0;
683 }
684
685 /* Validate descriptor checksum */
686 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
687 {
688 __u16 i;
689 __u8 cs = 0;
690
691 for (i = 0; i < rom_desc->Size; i++)
692 cs = (__u8)(cs + buffer[i]);
693
694 if (cs != rom_desc->CheckSum) {
695 dbg("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
696 return -EINVAL;
697 }
698 return 0;
699 }
700
701 /* Make sure that the I2C image is good */
702 static int check_i2c_image(struct edgeport_serial *serial)
703 {
704 struct device *dev = &serial->serial->dev->dev;
705 int status = 0;
706 struct ti_i2c_desc *rom_desc;
707 int start_address = 2;
708 __u8 *buffer;
709 __u16 ttype;
710
711 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
712 if (!rom_desc) {
713 dev_err(dev, "%s - out of memory\n", __func__);
714 return -ENOMEM;
715 }
716 buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
717 if (!buffer) {
718 dev_err(dev, "%s - out of memory when allocating buffer\n",
719 __func__);
720 kfree(rom_desc);
721 return -ENOMEM;
722 }
723
724 /* Read the first byte (Signature0) must be 0x52 or 0x10 */
725 status = read_rom(serial, 0, 1, buffer);
726 if (status)
727 goto out;
728
729 if (*buffer != UMP5152 && *buffer != UMP3410) {
730 dev_err(dev, "%s - invalid buffer signature\n", __func__);
731 status = -ENODEV;
732 goto out;
733 }
734
735 do {
736 /* Validate the I2C */
737 status = read_rom(serial,
738 start_address,
739 sizeof(struct ti_i2c_desc),
740 (__u8 *)rom_desc);
741 if (status)
742 break;
743
744 if ((start_address + sizeof(struct ti_i2c_desc) +
745 rom_desc->Size) > TI_MAX_I2C_SIZE) {
746 status = -ENODEV;
747 dbg("%s - structure too big, erroring out.", __func__);
748 break;
749 }
750
751 dbg("%s Type = 0x%x", __func__, rom_desc->Type);
752
753 /* Skip type 2 record */
754 ttype = rom_desc->Type & 0x0f;
755 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
756 && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
757 /* Read the descriptor data */
758 status = read_rom(serial, start_address +
759 sizeof(struct ti_i2c_desc),
760 rom_desc->Size, buffer);
761 if (status)
762 break;
763
764 status = valid_csum(rom_desc, buffer);
765 if (status)
766 break;
767 }
768 start_address = start_address + sizeof(struct ti_i2c_desc) +
769 rom_desc->Size;
770
771 } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
772 (start_address < TI_MAX_I2C_SIZE));
773
774 if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
775 (start_address > TI_MAX_I2C_SIZE))
776 status = -ENODEV;
777
778 out:
779 kfree(buffer);
780 kfree(rom_desc);
781 return status;
782 }
783
784 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
785 {
786 int status;
787 int start_address;
788 struct ti_i2c_desc *rom_desc;
789 struct edge_ti_manuf_descriptor *desc;
790
791 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
792 if (!rom_desc) {
793 dev_err(&serial->serial->dev->dev, "%s - out of memory\n",
794 __func__);
795 return -ENOMEM;
796 }
797 start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
798 rom_desc);
799
800 if (!start_address) {
801 dbg("%s - Edge Descriptor not found in I2C", __func__);
802 status = -ENODEV;
803 goto exit;
804 }
805
806 /* Read the descriptor data */
807 status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
808 rom_desc->Size, buffer);
809 if (status)
810 goto exit;
811
812 status = valid_csum(rom_desc, buffer);
813
814 desc = (struct edge_ti_manuf_descriptor *)buffer;
815 dbg("%s - IonConfig 0x%x", __func__, desc->IonConfig);
816 dbg("%s - Version %d", __func__, desc->Version);
817 dbg("%s - Cpu/Board 0x%x", __func__, desc->CpuRev_BoardRev);
818 dbg("%s - NumPorts %d", __func__, desc->NumPorts);
819 dbg("%s - NumVirtualPorts %d", __func__, desc->NumVirtualPorts);
820 dbg("%s - TotalPorts %d", __func__, desc->TotalPorts);
821
822 exit:
823 kfree(rom_desc);
824 return status;
825 }
826
827 /* Build firmware header used for firmware update */
828 static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
829 {
830 __u8 *buffer;
831 int buffer_size;
832 int i;
833 int err;
834 __u8 cs = 0;
835 struct ti_i2c_desc *i2c_header;
836 struct ti_i2c_image_header *img_header;
837 struct ti_i2c_firmware_rec *firmware_rec;
838 const struct firmware *fw;
839 const char *fw_name = "edgeport/down3.bin";
840
841 /* In order to update the I2C firmware we must change the type 2 record
842 * to type 0xF2. This will force the UMP to come up in Boot Mode.
843 * Then while in boot mode, the driver will download the latest
844 * firmware (padded to 15.5k) into the UMP ram. And finally when the
845 * device comes back up in download mode the driver will cause the new
846 * firmware to be copied from the UMP Ram to I2C and the firmware will
847 * update the record type from 0xf2 to 0x02.
848 */
849
850 /* Allocate a 15.5k buffer + 2 bytes for version number
851 * (Firmware Record) */
852 buffer_size = (((1024 * 16) - 512 ) +
853 sizeof(struct ti_i2c_firmware_rec));
854
855 buffer = kmalloc(buffer_size, GFP_KERNEL);
856 if (!buffer) {
857 dev_err(dev, "%s - out of memory\n", __func__);
858 return -ENOMEM;
859 }
860
861 // Set entire image of 0xffs
862 memset(buffer, 0xff, buffer_size);
863
864 err = request_firmware(&fw, fw_name, dev);
865 if (err) {
866 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
867 fw_name, err);
868 kfree(buffer);
869 return err;
870 }
871
872 /* Save Download Version Number */
873 OperationalMajorVersion = fw->data[0];
874 OperationalMinorVersion = fw->data[1];
875 OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
876
877 /* Copy version number into firmware record */
878 firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
879
880 firmware_rec->Ver_Major = OperationalMajorVersion;
881 firmware_rec->Ver_Minor = OperationalMinorVersion;
882
883 /* Pointer to fw_down memory image */
884 img_header = (struct ti_i2c_image_header *)&fw->data[4];
885
886 memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
887 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
888 le16_to_cpu(img_header->Length));
889
890 release_firmware(fw);
891
892 for (i=0; i < buffer_size; i++) {
893 cs = (__u8)(cs + buffer[i]);
894 }
895
896 kfree(buffer);
897
898 /* Build new header */
899 i2c_header = (struct ti_i2c_desc *)header;
900 firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data;
901
902 i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK;
903 i2c_header->Size = (__u16)buffer_size;
904 i2c_header->CheckSum = cs;
905 firmware_rec->Ver_Major = OperationalMajorVersion;
906 firmware_rec->Ver_Minor = OperationalMinorVersion;
907
908 return 0;
909 }
910
911 /* Try to figure out what type of I2c we have */
912 static int i2c_type_bootmode(struct edgeport_serial *serial)
913 {
914 int status;
915 u8 *data;
916
917 data = kmalloc(1, GFP_KERNEL);
918 if (!data) {
919 dev_err(&serial->serial->dev->dev,
920 "%s - out of memory\n", __func__);
921 return -ENOMEM;
922 }
923
924 /* Try to read type 2 */
925 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
926 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
927 if (status)
928 dbg("%s - read 2 status error = %d", __func__, status);
929 else
930 dbg("%s - read 2 data = 0x%x", __func__, *data);
931 if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
932 dbg("%s - ROM_TYPE_II", __func__);
933 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
934 goto out;
935 }
936
937 /* Try to read type 3 */
938 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
939 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
940 if (status)
941 dbg("%s - read 3 status error = %d", __func__, status);
942 else
943 dbg("%s - read 2 data = 0x%x", __func__, *data);
944 if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
945 dbg("%s - ROM_TYPE_III", __func__);
946 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
947 goto out;
948 }
949
950 dbg("%s - Unknown", __func__);
951 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
952 status = -ENODEV;
953 out:
954 kfree(data);
955 return status;
956 }
957
958 static int bulk_xfer(struct usb_serial *serial, void *buffer,
959 int length, int *num_sent)
960 {
961 int status;
962
963 status = usb_bulk_msg(serial->dev,
964 usb_sndbulkpipe(serial->dev,
965 serial->port[0]->bulk_out_endpointAddress),
966 buffer, length, num_sent, 1000);
967 return status;
968 }
969
970 /* Download given firmware image to the device (IN BOOT MODE) */
971 static int download_code(struct edgeport_serial *serial, __u8 *image,
972 int image_length)
973 {
974 int status = 0;
975 int pos;
976 int transfer;
977 int done;
978
979 /* Transfer firmware image */
980 for (pos = 0; pos < image_length; ) {
981 /* Read the next buffer from file */
982 transfer = image_length - pos;
983 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
984 transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
985
986 /* Transfer data */
987 status = bulk_xfer(serial->serial, &image[pos],
988 transfer, &done);
989 if (status)
990 break;
991 /* Advance buffer pointer */
992 pos += done;
993 }
994
995 return status;
996 }
997
998 /* FIXME!!! */
999 static int config_boot_dev(struct usb_device *dev)
1000 {
1001 return 0;
1002 }
1003
1004 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
1005 {
1006 return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
1007 }
1008
1009 /**
1010 * DownloadTIFirmware - Download run-time operating firmware to the TI5052
1011 *
1012 * This routine downloads the main operating code into the TI5052, using the
1013 * boot code already burned into E2PROM or ROM.
1014 */
1015 static int download_fw(struct edgeport_serial *serial)
1016 {
1017 struct device *dev = &serial->serial->dev->dev;
1018 int status = 0;
1019 int start_address;
1020 struct edge_ti_manuf_descriptor *ti_manuf_desc;
1021 struct usb_interface_descriptor *interface;
1022 int download_cur_ver;
1023 int download_new_ver;
1024
1025 /* This routine is entered by both the BOOT mode and the Download mode
1026 * We can determine which code is running by the reading the config
1027 * descriptor and if we have only one bulk pipe it is in boot mode
1028 */
1029 serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1030
1031 /* Default to type 2 i2c */
1032 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1033
1034 status = choose_config(serial->serial->dev);
1035 if (status)
1036 return status;
1037
1038 interface = &serial->serial->interface->cur_altsetting->desc;
1039 if (!interface) {
1040 dev_err(dev, "%s - no interface set, error!\n", __func__);
1041 return -ENODEV;
1042 }
1043
1044 /*
1045 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1046 * if we have more than one endpoint we are definitely in download
1047 * mode
1048 */
1049 if (interface->bNumEndpoints > 1)
1050 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1051 else
1052 /* Otherwise we will remain in configuring mode */
1053 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1054
1055 /********************************************************************/
1056 /* Download Mode */
1057 /********************************************************************/
1058 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
1059 struct ti_i2c_desc *rom_desc;
1060
1061 dbg("%s - RUNNING IN DOWNLOAD MODE", __func__);
1062
1063 status = check_i2c_image(serial);
1064 if (status) {
1065 dbg("%s - DOWNLOAD MODE -- BAD I2C", __func__);
1066 return status;
1067 }
1068
1069 /* Validate Hardware version number
1070 * Read Manufacturing Descriptor from TI Based Edgeport
1071 */
1072 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1073 if (!ti_manuf_desc) {
1074 dev_err(dev, "%s - out of memory.\n", __func__);
1075 return -ENOMEM;
1076 }
1077 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1078 if (status) {
1079 kfree(ti_manuf_desc);
1080 return status;
1081 }
1082
1083 /* Check version number of ION descriptor */
1084 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1085 dbg("%s - Wrong CPU Rev %d (Must be 2)",
1086 __func__, ti_cpu_rev(ti_manuf_desc));
1087 kfree(ti_manuf_desc);
1088 return -EINVAL;
1089 }
1090
1091 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1092 if (!rom_desc) {
1093 dev_err(dev, "%s - out of memory.\n", __func__);
1094 kfree(ti_manuf_desc);
1095 return -ENOMEM;
1096 }
1097
1098 /* Search for type 2 record (firmware record) */
1099 start_address = get_descriptor_addr(serial,
1100 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1101 if (start_address != 0) {
1102 struct ti_i2c_firmware_rec *firmware_version;
1103 u8 *record;
1104
1105 dbg("%s - Found Type FIRMWARE (Type 2) record",
1106 __func__);
1107
1108 firmware_version = kmalloc(sizeof(*firmware_version),
1109 GFP_KERNEL);
1110 if (!firmware_version) {
1111 dev_err(dev, "%s - out of memory.\n", __func__);
1112 kfree(rom_desc);
1113 kfree(ti_manuf_desc);
1114 return -ENOMEM;
1115 }
1116
1117 /* Validate version number
1118 * Read the descriptor data
1119 */
1120 status = read_rom(serial, start_address +
1121 sizeof(struct ti_i2c_desc),
1122 sizeof(struct ti_i2c_firmware_rec),
1123 (__u8 *)firmware_version);
1124 if (status) {
1125 kfree(firmware_version);
1126 kfree(rom_desc);
1127 kfree(ti_manuf_desc);
1128 return status;
1129 }
1130
1131 /* Check version number of download with current
1132 version in I2c */
1133 download_cur_ver = (firmware_version->Ver_Major << 8) +
1134 (firmware_version->Ver_Minor);
1135 download_new_ver = (OperationalMajorVersion << 8) +
1136 (OperationalMinorVersion);
1137
1138 dbg("%s - >> FW Versions Device %d.%d Driver %d.%d",
1139 __func__,
1140 firmware_version->Ver_Major,
1141 firmware_version->Ver_Minor,
1142 OperationalMajorVersion,
1143 OperationalMinorVersion);
1144
1145 /* Check if we have an old version in the I2C and
1146 update if necessary */
1147 if (download_cur_ver < download_new_ver) {
1148 dbg("%s - Update I2C dld from %d.%d to %d.%d",
1149 __func__,
1150 firmware_version->Ver_Major,
1151 firmware_version->Ver_Minor,
1152 OperationalMajorVersion,
1153 OperationalMinorVersion);
1154
1155 record = kmalloc(1, GFP_KERNEL);
1156 if (!record) {
1157 dev_err(dev, "%s - out of memory.\n",
1158 __func__);
1159 kfree(firmware_version);
1160 kfree(rom_desc);
1161 kfree(ti_manuf_desc);
1162 return -ENOMEM;
1163 }
1164 /* In order to update the I2C firmware we must
1165 * change the type 2 record to type 0xF2. This
1166 * will force the UMP to come up in Boot Mode.
1167 * Then while in boot mode, the driver will
1168 * download the latest firmware (padded to
1169 * 15.5k) into the UMP ram. Finally when the
1170 * device comes back up in download mode the
1171 * driver will cause the new firmware to be
1172 * copied from the UMP Ram to I2C and the
1173 * firmware will update the record type from
1174 * 0xf2 to 0x02.
1175 */
1176 *record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1177
1178 /* Change the I2C Firmware record type to
1179 0xf2 to trigger an update */
1180 status = write_rom(serial, start_address,
1181 sizeof(*record), record);
1182 if (status) {
1183 kfree(record);
1184 kfree(firmware_version);
1185 kfree(rom_desc);
1186 kfree(ti_manuf_desc);
1187 return status;
1188 }
1189
1190 /* verify the write -- must do this in order
1191 * for write to complete before we do the
1192 * hardware reset
1193 */
1194 status = read_rom(serial,
1195 start_address,
1196 sizeof(*record),
1197 record);
1198 if (status) {
1199 kfree(record);
1200 kfree(firmware_version);
1201 kfree(rom_desc);
1202 kfree(ti_manuf_desc);
1203 return status;
1204 }
1205
1206 if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1207 dev_err(dev,
1208 "%s - error resetting device\n",
1209 __func__);
1210 kfree(record);
1211 kfree(firmware_version);
1212 kfree(rom_desc);
1213 kfree(ti_manuf_desc);
1214 return -ENODEV;
1215 }
1216
1217 dbg("%s - HARDWARE RESET", __func__);
1218
1219 /* Reset UMP -- Back to BOOT MODE */
1220 status = ti_vsend_sync(serial->serial->dev,
1221 UMPC_HARDWARE_RESET,
1222 0, 0, NULL, 0);
1223
1224 dbg("%s - HARDWARE RESET return %d",
1225 __func__, status);
1226
1227 /* return an error on purpose. */
1228 kfree(record);
1229 kfree(firmware_version);
1230 kfree(rom_desc);
1231 kfree(ti_manuf_desc);
1232 return -ENODEV;
1233 }
1234 kfree(firmware_version);
1235 }
1236 /* Search for type 0xF2 record (firmware blank record) */
1237 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1238 #define HEADER_SIZE (sizeof(struct ti_i2c_desc) + \
1239 sizeof(struct ti_i2c_firmware_rec))
1240 __u8 *header;
1241 __u8 *vheader;
1242
1243 header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1244 if (!header) {
1245 dev_err(dev, "%s - out of memory.\n", __func__);
1246 kfree(rom_desc);
1247 kfree(ti_manuf_desc);
1248 return -ENOMEM;
1249 }
1250
1251 vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1252 if (!vheader) {
1253 dev_err(dev, "%s - out of memory.\n", __func__);
1254 kfree(header);
1255 kfree(rom_desc);
1256 kfree(ti_manuf_desc);
1257 return -ENOMEM;
1258 }
1259
1260 dbg("%s - Found Type BLANK FIRMWARE (Type F2) record",
1261 __func__);
1262
1263 /*
1264 * In order to update the I2C firmware we must change
1265 * the type 2 record to type 0xF2. This will force the
1266 * UMP to come up in Boot Mode. Then while in boot
1267 * mode, the driver will download the latest firmware
1268 * (padded to 15.5k) into the UMP ram. Finally when the
1269 * device comes back up in download mode the driver
1270 * will cause the new firmware to be copied from the
1271 * UMP Ram to I2C and the firmware will update the
1272 * record type from 0xf2 to 0x02.
1273 */
1274 status = build_i2c_fw_hdr(header, dev);
1275 if (status) {
1276 kfree(vheader);
1277 kfree(header);
1278 kfree(rom_desc);
1279 kfree(ti_manuf_desc);
1280 return -EINVAL;
1281 }
1282
1283 /* Update I2C with type 0xf2 record with correct
1284 size and checksum */
1285 status = write_rom(serial,
1286 start_address,
1287 HEADER_SIZE,
1288 header);
1289 if (status) {
1290 kfree(vheader);
1291 kfree(header);
1292 kfree(rom_desc);
1293 kfree(ti_manuf_desc);
1294 return -EINVAL;
1295 }
1296
1297 /* verify the write -- must do this in order for
1298 write to complete before we do the hardware reset */
1299 status = read_rom(serial, start_address,
1300 HEADER_SIZE, vheader);
1301
1302 if (status) {
1303 dbg("%s - can't read header back", __func__);
1304 kfree(vheader);
1305 kfree(header);
1306 kfree(rom_desc);
1307 kfree(ti_manuf_desc);
1308 return status;
1309 }
1310 if (memcmp(vheader, header, HEADER_SIZE)) {
1311 dbg("%s - write download record failed",
1312 __func__);
1313 kfree(vheader);
1314 kfree(header);
1315 kfree(rom_desc);
1316 kfree(ti_manuf_desc);
1317 return -EINVAL;
1318 }
1319
1320 kfree(vheader);
1321 kfree(header);
1322
1323 dbg("%s - Start firmware update", __func__);
1324
1325 /* Tell firmware to copy download image into I2C */
1326 status = ti_vsend_sync(serial->serial->dev,
1327 UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0);
1328
1329 dbg("%s - Update complete 0x%x", __func__, status);
1330 if (status) {
1331 dev_err(dev,
1332 "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1333 __func__);
1334 kfree(rom_desc);
1335 kfree(ti_manuf_desc);
1336 return status;
1337 }
1338 }
1339
1340 // The device is running the download code
1341 kfree(rom_desc);
1342 kfree(ti_manuf_desc);
1343 return 0;
1344 }
1345
1346 /********************************************************************/
1347 /* Boot Mode */
1348 /********************************************************************/
1349 dbg("%s - RUNNING IN BOOT MODE", __func__);
1350
1351 /* Configure the TI device so we can use the BULK pipes for download */
1352 status = config_boot_dev(serial->serial->dev);
1353 if (status)
1354 return status;
1355
1356 if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1357 != USB_VENDOR_ID_ION) {
1358 dbg("%s - VID = 0x%x", __func__,
1359 le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1360 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1361 goto stayinbootmode;
1362 }
1363
1364 /* We have an ION device (I2c Must be programmed)
1365 Determine I2C image type */
1366 if (i2c_type_bootmode(serial))
1367 goto stayinbootmode;
1368
1369 /* Check for ION Vendor ID and that the I2C is valid */
1370 if (!check_i2c_image(serial)) {
1371 struct ti_i2c_image_header *header;
1372 int i;
1373 __u8 cs = 0;
1374 __u8 *buffer;
1375 int buffer_size;
1376 int err;
1377 const struct firmware *fw;
1378 const char *fw_name = "edgeport/down3.bin";
1379
1380 /* Validate Hardware version number
1381 * Read Manufacturing Descriptor from TI Based Edgeport
1382 */
1383 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1384 if (!ti_manuf_desc) {
1385 dev_err(dev, "%s - out of memory.\n", __func__);
1386 return -ENOMEM;
1387 }
1388 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1389 if (status) {
1390 kfree(ti_manuf_desc);
1391 goto stayinbootmode;
1392 }
1393
1394 /* Check for version 2 */
1395 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1396 dbg("%s - Wrong CPU Rev %d (Must be 2)",
1397 __func__, ti_cpu_rev(ti_manuf_desc));
1398 kfree(ti_manuf_desc);
1399 goto stayinbootmode;
1400 }
1401
1402 kfree(ti_manuf_desc);
1403
1404 /*
1405 * In order to update the I2C firmware we must change the type
1406 * 2 record to type 0xF2. This will force the UMP to come up
1407 * in Boot Mode. Then while in boot mode, the driver will
1408 * download the latest firmware (padded to 15.5k) into the
1409 * UMP ram. Finally when the device comes back up in download
1410 * mode the driver will cause the new firmware to be copied
1411 * from the UMP Ram to I2C and the firmware will update the
1412 * record type from 0xf2 to 0x02.
1413 *
1414 * Do we really have to copy the whole firmware image,
1415 * or could we do this in place!
1416 */
1417
1418 /* Allocate a 15.5k buffer + 3 byte header */
1419 buffer_size = (((1024 * 16) - 512) +
1420 sizeof(struct ti_i2c_image_header));
1421 buffer = kmalloc(buffer_size, GFP_KERNEL);
1422 if (!buffer) {
1423 dev_err(dev, "%s - out of memory\n", __func__);
1424 return -ENOMEM;
1425 }
1426
1427 /* Initialize the buffer to 0xff (pad the buffer) */
1428 memset(buffer, 0xff, buffer_size);
1429
1430 err = request_firmware(&fw, fw_name, dev);
1431 if (err) {
1432 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
1433 fw_name, err);
1434 kfree(buffer);
1435 return err;
1436 }
1437 memcpy(buffer, &fw->data[4], fw->size - 4);
1438 release_firmware(fw);
1439
1440 for (i = sizeof(struct ti_i2c_image_header);
1441 i < buffer_size; i++) {
1442 cs = (__u8)(cs + buffer[i]);
1443 }
1444
1445 header = (struct ti_i2c_image_header *)buffer;
1446
1447 /* update length and checksum after padding */
1448 header->Length = cpu_to_le16((__u16)(buffer_size -
1449 sizeof(struct ti_i2c_image_header)));
1450 header->CheckSum = cs;
1451
1452 /* Download the operational code */
1453 dbg("%s - Downloading operational code image (TI UMP)",
1454 __func__);
1455 status = download_code(serial, buffer, buffer_size);
1456
1457 kfree(buffer);
1458
1459 if (status) {
1460 dbg("%s - Error downloading operational code image",
1461 __func__);
1462 return status;
1463 }
1464
1465 /* Device will reboot */
1466 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1467
1468 dbg("%s - Download successful -- Device rebooting...",
1469 __func__);
1470
1471 /* return an error on purpose */
1472 return -ENODEV;
1473 }
1474
1475 stayinbootmode:
1476 /* Eprom is invalid or blank stay in boot mode */
1477 dbg("%s - STAYING IN BOOT MODE", __func__);
1478 serial->product_info.TiMode = TI_MODE_BOOT;
1479
1480 return 0;
1481 }
1482
1483
1484 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1485 {
1486 int port_number = port->port->number - port->port->serial->minor;
1487 on = !!on; /* 1 or 0 not bitmask */
1488 return send_cmd(port->port->serial->dev,
1489 feature, (__u8)(UMPM_UART1_PORT + port_number),
1490 on, NULL, 0);
1491 }
1492
1493
1494 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1495 {
1496 int status = 0;
1497
1498 dbg("%s - %x", __func__, mcr);
1499
1500 status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1501 if (status)
1502 return status;
1503 status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1504 if (status)
1505 return status;
1506 return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1507 }
1508
1509 /* Convert TI LSR to standard UART flags */
1510 static __u8 map_line_status(__u8 ti_lsr)
1511 {
1512 __u8 lsr = 0;
1513
1514 #define MAP_FLAG(flagUmp, flagUart) \
1515 if (ti_lsr & flagUmp) \
1516 lsr |= flagUart;
1517
1518 MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */
1519 MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */
1520 MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */
1521 MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */
1522 MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* rx data available */
1523 MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* tx hold reg empty */
1524
1525 #undef MAP_FLAG
1526
1527 return lsr;
1528 }
1529
1530 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1531 {
1532 struct async_icount *icount;
1533 struct tty_struct *tty;
1534
1535 dbg("%s - %02x", __func__, msr);
1536
1537 if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1538 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1539 icount = &edge_port->icount;
1540
1541 /* update input line counters */
1542 if (msr & EDGEPORT_MSR_DELTA_CTS)
1543 icount->cts++;
1544 if (msr & EDGEPORT_MSR_DELTA_DSR)
1545 icount->dsr++;
1546 if (msr & EDGEPORT_MSR_DELTA_CD)
1547 icount->dcd++;
1548 if (msr & EDGEPORT_MSR_DELTA_RI)
1549 icount->rng++;
1550 wake_up_interruptible(&edge_port->delta_msr_wait);
1551 }
1552
1553 /* Save the new modem status */
1554 edge_port->shadow_msr = msr & 0xf0;
1555
1556 tty = tty_port_tty_get(&edge_port->port->port);
1557 /* handle CTS flow control */
1558 if (tty && C_CRTSCTS(tty)) {
1559 if (msr & EDGEPORT_MSR_CTS) {
1560 tty->hw_stopped = 0;
1561 tty_wakeup(tty);
1562 } else {
1563 tty->hw_stopped = 1;
1564 }
1565 }
1566 tty_kref_put(tty);
1567 }
1568
1569 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1570 __u8 lsr, __u8 data)
1571 {
1572 struct async_icount *icount;
1573 __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1574 LSR_FRM_ERR | LSR_BREAK));
1575 struct tty_struct *tty;
1576
1577 dbg("%s - %02x", __func__, new_lsr);
1578
1579 edge_port->shadow_lsr = lsr;
1580
1581 if (new_lsr & LSR_BREAK)
1582 /*
1583 * Parity and Framing errors only count if they
1584 * occur exclusive of a break being received.
1585 */
1586 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1587
1588 /* Place LSR data byte into Rx buffer */
1589 if (lsr_data) {
1590 tty = tty_port_tty_get(&edge_port->port->port);
1591 if (tty) {
1592 edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
1593 tty_kref_put(tty);
1594 }
1595 }
1596
1597 /* update input line counters */
1598 icount = &edge_port->icount;
1599 if (new_lsr & LSR_BREAK)
1600 icount->brk++;
1601 if (new_lsr & LSR_OVER_ERR)
1602 icount->overrun++;
1603 if (new_lsr & LSR_PAR_ERR)
1604 icount->parity++;
1605 if (new_lsr & LSR_FRM_ERR)
1606 icount->frame++;
1607 }
1608
1609
1610 static void edge_interrupt_callback(struct urb *urb)
1611 {
1612 struct edgeport_serial *edge_serial = urb->context;
1613 struct usb_serial_port *port;
1614 struct edgeport_port *edge_port;
1615 unsigned char *data = urb->transfer_buffer;
1616 int length = urb->actual_length;
1617 int port_number;
1618 int function;
1619 int retval;
1620 __u8 lsr;
1621 __u8 msr;
1622 int status = urb->status;
1623
1624 dbg("%s", __func__);
1625
1626 switch (status) {
1627 case 0:
1628 /* success */
1629 break;
1630 case -ECONNRESET:
1631 case -ENOENT:
1632 case -ESHUTDOWN:
1633 /* this urb is terminated, clean up */
1634 dbg("%s - urb shutting down with status: %d",
1635 __func__, status);
1636 return;
1637 default:
1638 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1639 "%d\n", __func__, status);
1640 goto exit;
1641 }
1642
1643 if (!length) {
1644 dbg("%s - no data in urb", __func__);
1645 goto exit;
1646 }
1647
1648 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
1649 __func__, length, data);
1650
1651 if (length != 2) {
1652 dbg("%s - expecting packet of size 2, got %d",
1653 __func__, length);
1654 goto exit;
1655 }
1656
1657 port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1658 function = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1659 dbg("%s - port_number %d, function %d, info 0x%x",
1660 __func__, port_number, function, data[1]);
1661 port = edge_serial->serial->port[port_number];
1662 edge_port = usb_get_serial_port_data(port);
1663 if (!edge_port) {
1664 dbg("%s - edge_port not found", __func__);
1665 return;
1666 }
1667 switch (function) {
1668 case TIUMP_INTERRUPT_CODE_LSR:
1669 lsr = map_line_status(data[1]);
1670 if (lsr & UMP_UART_LSR_DATA_MASK) {
1671 /* Save the LSR event for bulk read
1672 completion routine */
1673 dbg("%s - LSR Event Port %u LSR Status = %02x",
1674 __func__, port_number, lsr);
1675 edge_port->lsr_event = 1;
1676 edge_port->lsr_mask = lsr;
1677 } else {
1678 dbg("%s - ===== Port %d LSR Status = %02x ======",
1679 __func__, port_number, lsr);
1680 handle_new_lsr(edge_port, 0, lsr, 0);
1681 }
1682 break;
1683
1684 case TIUMP_INTERRUPT_CODE_MSR: /* MSR */
1685 /* Copy MSR from UMP */
1686 msr = data[1];
1687 dbg("%s - ===== Port %u MSR Status = %02x ======",
1688 __func__, port_number, msr);
1689 handle_new_msr(edge_port, msr);
1690 break;
1691
1692 default:
1693 dev_err(&urb->dev->dev,
1694 "%s - Unknown Interrupt code from UMP %x\n",
1695 __func__, data[1]);
1696 break;
1697
1698 }
1699
1700 exit:
1701 retval = usb_submit_urb(urb, GFP_ATOMIC);
1702 if (retval)
1703 dev_err(&urb->dev->dev,
1704 "%s - usb_submit_urb failed with result %d\n",
1705 __func__, retval);
1706 }
1707
1708 static void edge_bulk_in_callback(struct urb *urb)
1709 {
1710 struct edgeport_port *edge_port = urb->context;
1711 unsigned char *data = urb->transfer_buffer;
1712 struct tty_struct *tty;
1713 int retval = 0;
1714 int port_number;
1715 int status = urb->status;
1716
1717 dbg("%s", __func__);
1718
1719 switch (status) {
1720 case 0:
1721 /* success */
1722 break;
1723 case -ECONNRESET:
1724 case -ENOENT:
1725 case -ESHUTDOWN:
1726 /* this urb is terminated, clean up */
1727 dbg("%s - urb shutting down with status: %d",
1728 __func__, status);
1729 return;
1730 default:
1731 dev_err(&urb->dev->dev,
1732 "%s - nonzero read bulk status received: %d\n",
1733 __func__, status);
1734 }
1735
1736 if (status == -EPIPE)
1737 goto exit;
1738
1739 if (status) {
1740 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1741 return;
1742 }
1743
1744 port_number = edge_port->port->number - edge_port->port->serial->minor;
1745
1746 if (edge_port->lsr_event) {
1747 edge_port->lsr_event = 0;
1748 dbg("%s ===== Port %u LSR Status = %02x, Data = %02x ======",
1749 __func__, port_number, edge_port->lsr_mask, *data);
1750 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1751 /* Adjust buffer length/pointer */
1752 --urb->actual_length;
1753 ++data;
1754 }
1755
1756 tty = tty_port_tty_get(&edge_port->port->port);
1757 if (tty && urb->actual_length) {
1758 usb_serial_debug_data(debug, &edge_port->port->dev,
1759 __func__, urb->actual_length, data);
1760 if (edge_port->close_pending)
1761 dbg("%s - close pending, dropping data on the floor",
1762 __func__);
1763 else
1764 edge_tty_recv(&edge_port->port->dev, tty, data,
1765 urb->actual_length);
1766 edge_port->icount.rx += urb->actual_length;
1767 }
1768 tty_kref_put(tty);
1769
1770 exit:
1771 /* continue read unless stopped */
1772 spin_lock(&edge_port->ep_lock);
1773 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1774 retval = usb_submit_urb(urb, GFP_ATOMIC);
1775 else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1776 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1777
1778 spin_unlock(&edge_port->ep_lock);
1779 if (retval)
1780 dev_err(&urb->dev->dev,
1781 "%s - usb_submit_urb failed with result %d\n",
1782 __func__, retval);
1783 }
1784
1785 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
1786 unsigned char *data, int length)
1787 {
1788 int queued;
1789
1790 queued = tty_insert_flip_string(tty, data, length);
1791 if (queued < length)
1792 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1793 __func__, length - queued);
1794 tty_flip_buffer_push(tty);
1795 }
1796
1797 static void edge_bulk_out_callback(struct urb *urb)
1798 {
1799 struct usb_serial_port *port = urb->context;
1800 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1801 int status = urb->status;
1802 struct tty_struct *tty;
1803
1804 dbg("%s - port %d", __func__, port->number);
1805
1806 edge_port->ep_write_urb_in_use = 0;
1807
1808 switch (status) {
1809 case 0:
1810 /* success */
1811 break;
1812 case -ECONNRESET:
1813 case -ENOENT:
1814 case -ESHUTDOWN:
1815 /* this urb is terminated, clean up */
1816 dbg("%s - urb shutting down with status: %d",
1817 __func__, status);
1818 return;
1819 default:
1820 dev_err(&urb->dev->dev, "%s - nonzero write bulk status "
1821 "received: %d\n", __func__, status);
1822 }
1823
1824 /* send any buffered data */
1825 tty = tty_port_tty_get(&port->port);
1826 edge_send(tty);
1827 tty_kref_put(tty);
1828 }
1829
1830 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1831 {
1832 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1833 struct edgeport_serial *edge_serial;
1834 struct usb_device *dev;
1835 struct urb *urb;
1836 int port_number;
1837 int status;
1838 u16 open_settings;
1839 u8 transaction_timeout;
1840
1841 dbg("%s - port %d", __func__, port->number);
1842
1843 if (edge_port == NULL)
1844 return -ENODEV;
1845
1846 port_number = port->number - port->serial->minor;
1847 switch (port_number) {
1848 case 0:
1849 edge_port->uart_base = UMPMEM_BASE_UART1;
1850 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
1851 break;
1852 case 1:
1853 edge_port->uart_base = UMPMEM_BASE_UART2;
1854 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
1855 break;
1856 default:
1857 dev_err(&port->dev, "Unknown port number!!!\n");
1858 return -ENODEV;
1859 }
1860
1861 dbg("%s - port_number = %d, uart_base = %04x, dma_address = %04x",
1862 __func__, port_number, edge_port->uart_base,
1863 edge_port->dma_address);
1864
1865 dev = port->serial->dev;
1866
1867 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1868 init_waitqueue_head(&edge_port->delta_msr_wait);
1869
1870 /* turn off loopback */
1871 status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1872 if (status) {
1873 dev_err(&port->dev,
1874 "%s - cannot send clear loopback command, %d\n",
1875 __func__, status);
1876 return status;
1877 }
1878
1879 /* set up the port settings */
1880 if (tty)
1881 edge_set_termios(tty, port, tty->termios);
1882
1883 /* open up the port */
1884
1885 /* milliseconds to timeout for DMA transfer */
1886 transaction_timeout = 2;
1887
1888 edge_port->ump_read_timeout =
1889 max(20, ((transaction_timeout * 3) / 2));
1890
1891 /* milliseconds to timeout for DMA transfer */
1892 open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1893 UMP_PIPE_TRANS_TIMEOUT_ENA |
1894 (transaction_timeout << 2));
1895
1896 dbg("%s - Sending UMPC_OPEN_PORT", __func__);
1897
1898 /* Tell TI to open and start the port */
1899 status = send_cmd(dev, UMPC_OPEN_PORT,
1900 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1901 if (status) {
1902 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1903 __func__, status);
1904 return status;
1905 }
1906
1907 /* Start the DMA? */
1908 status = send_cmd(dev, UMPC_START_PORT,
1909 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1910 if (status) {
1911 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1912 __func__, status);
1913 return status;
1914 }
1915
1916 /* Clear TX and RX buffers in UMP */
1917 status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1918 if (status) {
1919 dev_err(&port->dev,
1920 "%s - cannot send clear buffers command, %d\n",
1921 __func__, status);
1922 return status;
1923 }
1924
1925 /* Read Initial MSR */
1926 status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1927 (__u16)(UMPM_UART1_PORT + port_number),
1928 &edge_port->shadow_msr, 1);
1929 if (status) {
1930 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1931 __func__, status);
1932 return status;
1933 }
1934
1935 dbg("ShadowMSR 0x%X", edge_port->shadow_msr);
1936
1937 /* Set Initial MCR */
1938 edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1939 dbg("ShadowMCR 0x%X", edge_port->shadow_mcr);
1940
1941 edge_serial = edge_port->edge_serial;
1942 if (mutex_lock_interruptible(&edge_serial->es_lock))
1943 return -ERESTARTSYS;
1944 if (edge_serial->num_ports_open == 0) {
1945 /* we are the first port to open, post the interrupt urb */
1946 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1947 if (!urb) {
1948 dev_err(&port->dev,
1949 "%s - no interrupt urb present, exiting\n",
1950 __func__);
1951 status = -EINVAL;
1952 goto release_es_lock;
1953 }
1954 urb->context = edge_serial;
1955 status = usb_submit_urb(urb, GFP_KERNEL);
1956 if (status) {
1957 dev_err(&port->dev,
1958 "%s - usb_submit_urb failed with value %d\n",
1959 __func__, status);
1960 goto release_es_lock;
1961 }
1962 }
1963
1964 /*
1965 * reset the data toggle on the bulk endpoints to work around bug in
1966 * host controllers where things get out of sync some times
1967 */
1968 usb_clear_halt(dev, port->write_urb->pipe);
1969 usb_clear_halt(dev, port->read_urb->pipe);
1970
1971 /* start up our bulk read urb */
1972 urb = port->read_urb;
1973 if (!urb) {
1974 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1975 __func__);
1976 status = -EINVAL;
1977 goto unlink_int_urb;
1978 }
1979 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1980 urb->context = edge_port;
1981 status = usb_submit_urb(urb, GFP_KERNEL);
1982 if (status) {
1983 dev_err(&port->dev,
1984 "%s - read bulk usb_submit_urb failed with value %d\n",
1985 __func__, status);
1986 goto unlink_int_urb;
1987 }
1988
1989 ++edge_serial->num_ports_open;
1990
1991 dbg("%s - exited", __func__);
1992
1993 goto release_es_lock;
1994
1995 unlink_int_urb:
1996 if (edge_port->edge_serial->num_ports_open == 0)
1997 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1998 release_es_lock:
1999 mutex_unlock(&edge_serial->es_lock);
2000 return status;
2001 }
2002
2003 static void edge_close(struct usb_serial_port *port)
2004 {
2005 struct edgeport_serial *edge_serial;
2006 struct edgeport_port *edge_port;
2007 int port_number;
2008 int status;
2009
2010 dbg("%s - port %d", __func__, port->number);
2011
2012 edge_serial = usb_get_serial_data(port->serial);
2013 edge_port = usb_get_serial_port_data(port);
2014 if (edge_serial == NULL || edge_port == NULL)
2015 return;
2016
2017 /* The bulkreadcompletion routine will check
2018 * this flag and dump add read data */
2019 edge_port->close_pending = 1;
2020
2021 /* chase the port close and flush */
2022 chase_port(edge_port, (HZ * closing_wait) / 100, 1);
2023
2024 usb_kill_urb(port->read_urb);
2025 usb_kill_urb(port->write_urb);
2026 edge_port->ep_write_urb_in_use = 0;
2027
2028 /* assuming we can still talk to the device,
2029 * send a close port command to it */
2030 dbg("%s - send umpc_close_port", __func__);
2031 port_number = port->number - port->serial->minor;
2032 status = send_cmd(port->serial->dev,
2033 UMPC_CLOSE_PORT,
2034 (__u8)(UMPM_UART1_PORT + port_number),
2035 0,
2036 NULL,
2037 0);
2038 mutex_lock(&edge_serial->es_lock);
2039 --edge_port->edge_serial->num_ports_open;
2040 if (edge_port->edge_serial->num_ports_open <= 0) {
2041 /* last port is now closed, let's shut down our interrupt urb */
2042 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2043 edge_port->edge_serial->num_ports_open = 0;
2044 }
2045 mutex_unlock(&edge_serial->es_lock);
2046 edge_port->close_pending = 0;
2047
2048 dbg("%s - exited", __func__);
2049 }
2050
2051 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
2052 const unsigned char *data, int count)
2053 {
2054 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2055
2056 dbg("%s - port %d", __func__, port->number);
2057
2058 if (count == 0) {
2059 dbg("%s - write request of 0 bytes", __func__);
2060 return 0;
2061 }
2062
2063 if (edge_port == NULL)
2064 return -ENODEV;
2065 if (edge_port->close_pending == 1)
2066 return -ENODEV;
2067
2068 count = kfifo_in_locked(&edge_port->write_fifo, data, count,
2069 &edge_port->ep_lock);
2070 edge_send(tty);
2071
2072 return count;
2073 }
2074
2075 static void edge_send(struct tty_struct *tty)
2076 {
2077 struct usb_serial_port *port = tty->driver_data;
2078 int count, result;
2079 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2080 unsigned long flags;
2081
2082
2083 dbg("%s - port %d", __func__, port->number);
2084
2085 spin_lock_irqsave(&edge_port->ep_lock, flags);
2086
2087 if (edge_port->ep_write_urb_in_use) {
2088 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2089 return;
2090 }
2091
2092 count = kfifo_out(&edge_port->write_fifo,
2093 port->write_urb->transfer_buffer,
2094 port->bulk_out_size);
2095
2096 if (count == 0) {
2097 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2098 return;
2099 }
2100
2101 edge_port->ep_write_urb_in_use = 1;
2102
2103 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2104
2105 usb_serial_debug_data(debug, &port->dev, __func__, count,
2106 port->write_urb->transfer_buffer);
2107
2108 /* set up our urb */
2109 port->write_urb->transfer_buffer_length = count;
2110
2111 /* send the data out the bulk port */
2112 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2113 if (result) {
2114 dev_err(&port->dev,
2115 "%s - failed submitting write urb, error %d\n",
2116 __func__, result);
2117 edge_port->ep_write_urb_in_use = 0;
2118 /* TODO: reschedule edge_send */
2119 } else
2120 edge_port->icount.tx += count;
2121
2122 /* wakeup any process waiting for writes to complete */
2123 /* there is now more room in the buffer for new writes */
2124 if (tty)
2125 tty_wakeup(tty);
2126 }
2127
2128 static int edge_write_room(struct tty_struct *tty)
2129 {
2130 struct usb_serial_port *port = tty->driver_data;
2131 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2132 int room = 0;
2133 unsigned long flags;
2134
2135 dbg("%s - port %d", __func__, port->number);
2136
2137 if (edge_port == NULL)
2138 return 0;
2139 if (edge_port->close_pending == 1)
2140 return 0;
2141
2142 spin_lock_irqsave(&edge_port->ep_lock, flags);
2143 room = kfifo_avail(&edge_port->write_fifo);
2144 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2145
2146 dbg("%s - returns %d", __func__, room);
2147 return room;
2148 }
2149
2150 static int edge_chars_in_buffer(struct tty_struct *tty)
2151 {
2152 struct usb_serial_port *port = tty->driver_data;
2153 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2154 int chars = 0;
2155 unsigned long flags;
2156
2157 dbg("%s - port %d", __func__, port->number);
2158
2159 if (edge_port == NULL)
2160 return 0;
2161 if (edge_port->close_pending == 1)
2162 return 0;
2163
2164 spin_lock_irqsave(&edge_port->ep_lock, flags);
2165 chars = kfifo_len(&edge_port->write_fifo);
2166 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2167
2168 dbg("%s - returns %d", __func__, chars);
2169 return chars;
2170 }
2171
2172 static void edge_throttle(struct tty_struct *tty)
2173 {
2174 struct usb_serial_port *port = tty->driver_data;
2175 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2176 int status;
2177
2178 dbg("%s - port %d", __func__, port->number);
2179
2180 if (edge_port == NULL)
2181 return;
2182
2183 /* if we are implementing XON/XOFF, send the stop character */
2184 if (I_IXOFF(tty)) {
2185 unsigned char stop_char = STOP_CHAR(tty);
2186 status = edge_write(tty, port, &stop_char, 1);
2187 if (status <= 0) {
2188 dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2189 }
2190 }
2191
2192 /* if we are implementing RTS/CTS, stop reads */
2193 /* and the Edgeport will clear the RTS line */
2194 if (C_CRTSCTS(tty))
2195 stop_read(edge_port);
2196
2197 }
2198
2199 static void edge_unthrottle(struct tty_struct *tty)
2200 {
2201 struct usb_serial_port *port = tty->driver_data;
2202 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2203 int status;
2204
2205 dbg("%s - port %d", __func__, port->number);
2206
2207 if (edge_port == NULL)
2208 return;
2209
2210 /* if we are implementing XON/XOFF, send the start character */
2211 if (I_IXOFF(tty)) {
2212 unsigned char start_char = START_CHAR(tty);
2213 status = edge_write(tty, port, &start_char, 1);
2214 if (status <= 0) {
2215 dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2216 }
2217 }
2218 /* if we are implementing RTS/CTS, restart reads */
2219 /* are the Edgeport will assert the RTS line */
2220 if (C_CRTSCTS(tty)) {
2221 status = restart_read(edge_port);
2222 if (status)
2223 dev_err(&port->dev,
2224 "%s - read bulk usb_submit_urb failed: %d\n",
2225 __func__, status);
2226 }
2227
2228 }
2229
2230 static void stop_read(struct edgeport_port *edge_port)
2231 {
2232 unsigned long flags;
2233
2234 spin_lock_irqsave(&edge_port->ep_lock, flags);
2235
2236 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2237 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2238 edge_port->shadow_mcr &= ~MCR_RTS;
2239
2240 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2241 }
2242
2243 static int restart_read(struct edgeport_port *edge_port)
2244 {
2245 struct urb *urb;
2246 int status = 0;
2247 unsigned long flags;
2248
2249 spin_lock_irqsave(&edge_port->ep_lock, flags);
2250
2251 if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2252 urb = edge_port->port->read_urb;
2253 status = usb_submit_urb(urb, GFP_ATOMIC);
2254 }
2255 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2256 edge_port->shadow_mcr |= MCR_RTS;
2257
2258 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2259
2260 return status;
2261 }
2262
2263 static void change_port_settings(struct tty_struct *tty,
2264 struct edgeport_port *edge_port, struct ktermios *old_termios)
2265 {
2266 struct ump_uart_config *config;
2267 int baud;
2268 unsigned cflag;
2269 int status;
2270 int port_number = edge_port->port->number -
2271 edge_port->port->serial->minor;
2272
2273 dbg("%s - port %d", __func__, edge_port->port->number);
2274
2275 config = kmalloc (sizeof (*config), GFP_KERNEL);
2276 if (!config) {
2277 *tty->termios = *old_termios;
2278 dev_err(&edge_port->port->dev, "%s - out of memory\n",
2279 __func__);
2280 return;
2281 }
2282
2283 cflag = tty->termios->c_cflag;
2284
2285 config->wFlags = 0;
2286
2287 /* These flags must be set */
2288 config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2289 config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2290 config->bUartMode = (__u8)(edge_port->bUartMode);
2291
2292 switch (cflag & CSIZE) {
2293 case CS5:
2294 config->bDataBits = UMP_UART_CHAR5BITS;
2295 dbg("%s - data bits = 5", __func__);
2296 break;
2297 case CS6:
2298 config->bDataBits = UMP_UART_CHAR6BITS;
2299 dbg("%s - data bits = 6", __func__);
2300 break;
2301 case CS7:
2302 config->bDataBits = UMP_UART_CHAR7BITS;
2303 dbg("%s - data bits = 7", __func__);
2304 break;
2305 default:
2306 case CS8:
2307 config->bDataBits = UMP_UART_CHAR8BITS;
2308 dbg("%s - data bits = 8", __func__);
2309 break;
2310 }
2311
2312 if (cflag & PARENB) {
2313 if (cflag & PARODD) {
2314 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2315 config->bParity = UMP_UART_ODDPARITY;
2316 dbg("%s - parity = odd", __func__);
2317 } else {
2318 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2319 config->bParity = UMP_UART_EVENPARITY;
2320 dbg("%s - parity = even", __func__);
2321 }
2322 } else {
2323 config->bParity = UMP_UART_NOPARITY;
2324 dbg("%s - parity = none", __func__);
2325 }
2326
2327 if (cflag & CSTOPB) {
2328 config->bStopBits = UMP_UART_STOPBIT2;
2329 dbg("%s - stop bits = 2", __func__);
2330 } else {
2331 config->bStopBits = UMP_UART_STOPBIT1;
2332 dbg("%s - stop bits = 1", __func__);
2333 }
2334
2335 /* figure out the flow control settings */
2336 if (cflag & CRTSCTS) {
2337 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2338 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2339 dbg("%s - RTS/CTS is enabled", __func__);
2340 } else {
2341 dbg("%s - RTS/CTS is disabled", __func__);
2342 tty->hw_stopped = 0;
2343 restart_read(edge_port);
2344 }
2345
2346 /* if we are implementing XON/XOFF, set the start and stop
2347 character in the device */
2348 config->cXon = START_CHAR(tty);
2349 config->cXoff = STOP_CHAR(tty);
2350
2351 /* if we are implementing INBOUND XON/XOFF */
2352 if (I_IXOFF(tty)) {
2353 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2354 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2355 __func__, config->cXon, config->cXoff);
2356 } else
2357 dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2358
2359 /* if we are implementing OUTBOUND XON/XOFF */
2360 if (I_IXON(tty)) {
2361 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2362 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2363 __func__, config->cXon, config->cXoff);
2364 } else
2365 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2366
2367 tty->termios->c_cflag &= ~CMSPAR;
2368
2369 /* Round the baud rate */
2370 baud = tty_get_baud_rate(tty);
2371 if (!baud) {
2372 /* pick a default, any default... */
2373 baud = 9600;
2374 } else
2375 tty_encode_baud_rate(tty, baud, baud);
2376
2377 edge_port->baud_rate = baud;
2378 config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2379
2380 /* FIXME: Recompute actual baud from divisor here */
2381
2382 dbg("%s - baud rate = %d, wBaudRate = %d", __func__, baud,
2383 config->wBaudRate);
2384
2385 dbg("wBaudRate: %d", (int)(461550L / config->wBaudRate));
2386 dbg("wFlags: 0x%x", config->wFlags);
2387 dbg("bDataBits: %d", config->bDataBits);
2388 dbg("bParity: %d", config->bParity);
2389 dbg("bStopBits: %d", config->bStopBits);
2390 dbg("cXon: %d", config->cXon);
2391 dbg("cXoff: %d", config->cXoff);
2392 dbg("bUartMode: %d", config->bUartMode);
2393
2394 /* move the word values into big endian mode */
2395 cpu_to_be16s(&config->wFlags);
2396 cpu_to_be16s(&config->wBaudRate);
2397
2398 status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2399 (__u8)(UMPM_UART1_PORT + port_number),
2400 0, (__u8 *)config, sizeof(*config));
2401 if (status)
2402 dbg("%s - error %d when trying to write config to device",
2403 __func__, status);
2404 kfree(config);
2405 }
2406
2407 static void edge_set_termios(struct tty_struct *tty,
2408 struct usb_serial_port *port, struct ktermios *old_termios)
2409 {
2410 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2411 unsigned int cflag;
2412
2413 cflag = tty->termios->c_cflag;
2414
2415 dbg("%s - clfag %08x iflag %08x", __func__,
2416 tty->termios->c_cflag, tty->termios->c_iflag);
2417 dbg("%s - old clfag %08x old iflag %08x", __func__,
2418 old_termios->c_cflag, old_termios->c_iflag);
2419 dbg("%s - port %d", __func__, port->number);
2420
2421 if (edge_port == NULL)
2422 return;
2423 /* change the port settings to the new ones specified */
2424 change_port_settings(tty, edge_port, old_termios);
2425 }
2426
2427 static int edge_tiocmset(struct tty_struct *tty,
2428 unsigned int set, unsigned int clear)
2429 {
2430 struct usb_serial_port *port = tty->driver_data;
2431 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2432 unsigned int mcr;
2433 unsigned long flags;
2434
2435 dbg("%s - port %d", __func__, port->number);
2436
2437 spin_lock_irqsave(&edge_port->ep_lock, flags);
2438 mcr = edge_port->shadow_mcr;
2439 if (set & TIOCM_RTS)
2440 mcr |= MCR_RTS;
2441 if (set & TIOCM_DTR)
2442 mcr |= MCR_DTR;
2443 if (set & TIOCM_LOOP)
2444 mcr |= MCR_LOOPBACK;
2445
2446 if (clear & TIOCM_RTS)
2447 mcr &= ~MCR_RTS;
2448 if (clear & TIOCM_DTR)
2449 mcr &= ~MCR_DTR;
2450 if (clear & TIOCM_LOOP)
2451 mcr &= ~MCR_LOOPBACK;
2452
2453 edge_port->shadow_mcr = mcr;
2454 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2455
2456 restore_mcr(edge_port, mcr);
2457 return 0;
2458 }
2459
2460 static int edge_tiocmget(struct tty_struct *tty)
2461 {
2462 struct usb_serial_port *port = tty->driver_data;
2463 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2464 unsigned int result = 0;
2465 unsigned int msr;
2466 unsigned int mcr;
2467 unsigned long flags;
2468
2469 dbg("%s - port %d", __func__, port->number);
2470
2471 spin_lock_irqsave(&edge_port->ep_lock, flags);
2472
2473 msr = edge_port->shadow_msr;
2474 mcr = edge_port->shadow_mcr;
2475 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
2476 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
2477 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
2478 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
2479 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
2480 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
2481
2482
2483 dbg("%s -- %x", __func__, result);
2484 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2485
2486 return result;
2487 }
2488
2489 static int edge_get_icount(struct tty_struct *tty,
2490 struct serial_icounter_struct *icount)
2491 {
2492 struct usb_serial_port *port = tty->driver_data;
2493 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2494 struct async_icount *ic = &edge_port->icount;
2495
2496 icount->cts = ic->cts;
2497 icount->dsr = ic->dsr;
2498 icount->rng = ic->rng;
2499 icount->dcd = ic->dcd;
2500 icount->tx = ic->tx;
2501 icount->rx = ic->rx;
2502 icount->frame = ic->frame;
2503 icount->parity = ic->parity;
2504 icount->overrun = ic->overrun;
2505 icount->brk = ic->brk;
2506 icount->buf_overrun = ic->buf_overrun;
2507 return 0;
2508 }
2509
2510 static int get_serial_info(struct edgeport_port *edge_port,
2511 struct serial_struct __user *retinfo)
2512 {
2513 struct serial_struct tmp;
2514
2515 if (!retinfo)
2516 return -EFAULT;
2517
2518 memset(&tmp, 0, sizeof(tmp));
2519
2520 tmp.type = PORT_16550A;
2521 tmp.line = edge_port->port->serial->minor;
2522 tmp.port = edge_port->port->number;
2523 tmp.irq = 0;
2524 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2525 tmp.xmit_fifo_size = edge_port->port->bulk_out_size;
2526 tmp.baud_base = 9600;
2527 tmp.close_delay = 5*HZ;
2528 tmp.closing_wait = closing_wait;
2529
2530 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2531 return -EFAULT;
2532 return 0;
2533 }
2534
2535 static int edge_ioctl(struct tty_struct *tty,
2536 unsigned int cmd, unsigned long arg)
2537 {
2538 struct usb_serial_port *port = tty->driver_data;
2539 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2540 struct async_icount cnow;
2541 struct async_icount cprev;
2542
2543 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2544
2545 switch (cmd) {
2546 case TIOCGSERIAL:
2547 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
2548 return get_serial_info(edge_port,
2549 (struct serial_struct __user *) arg);
2550 case TIOCMIWAIT:
2551 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
2552 cprev = edge_port->icount;
2553 while (1) {
2554 interruptible_sleep_on(&edge_port->delta_msr_wait);
2555 /* see if a signal did it */
2556 if (signal_pending(current))
2557 return -ERESTARTSYS;
2558 cnow = edge_port->icount;
2559 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2560 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2561 return -EIO; /* no change => error */
2562 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2563 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2564 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2565 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2566 return 0;
2567 }
2568 cprev = cnow;
2569 }
2570 /* not reached */
2571 break;
2572 }
2573 return -ENOIOCTLCMD;
2574 }
2575
2576 static void edge_break(struct tty_struct *tty, int break_state)
2577 {
2578 struct usb_serial_port *port = tty->driver_data;
2579 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2580 int status;
2581 int bv = 0; /* Off */
2582
2583 dbg("%s - state = %d", __func__, break_state);
2584
2585 /* chase the port close */
2586 chase_port(edge_port, 0, 0);
2587
2588 if (break_state == -1)
2589 bv = 1; /* On */
2590 status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2591 if (status)
2592 dbg("%s - error %d sending break set/clear command.",
2593 __func__, status);
2594 }
2595
2596 static int edge_startup(struct usb_serial *serial)
2597 {
2598 struct edgeport_serial *edge_serial;
2599 struct edgeport_port *edge_port;
2600 struct usb_device *dev;
2601 int status;
2602 int i;
2603
2604 dev = serial->dev;
2605
2606 /* create our private serial structure */
2607 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2608 if (edge_serial == NULL) {
2609 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2610 return -ENOMEM;
2611 }
2612 mutex_init(&edge_serial->es_lock);
2613 edge_serial->serial = serial;
2614 usb_set_serial_data(serial, edge_serial);
2615
2616 status = download_fw(edge_serial);
2617 if (status) {
2618 kfree(edge_serial);
2619 return status;
2620 }
2621
2622 /* set up our port private structures */
2623 for (i = 0; i < serial->num_ports; ++i) {
2624 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
2625 if (edge_port == NULL) {
2626 dev_err(&serial->dev->dev, "%s - Out of memory\n",
2627 __func__);
2628 goto cleanup;
2629 }
2630 spin_lock_init(&edge_port->ep_lock);
2631 if (kfifo_alloc(&edge_port->write_fifo, EDGE_OUT_BUF_SIZE,
2632 GFP_KERNEL)) {
2633 dev_err(&serial->dev->dev, "%s - Out of memory\n",
2634 __func__);
2635 kfree(edge_port);
2636 goto cleanup;
2637 }
2638 edge_port->port = serial->port[i];
2639 edge_port->edge_serial = edge_serial;
2640 usb_set_serial_port_data(serial->port[i], edge_port);
2641 edge_port->bUartMode = default_uart_mode;
2642 }
2643
2644 return 0;
2645
2646 cleanup:
2647 for (--i; i >= 0; --i) {
2648 edge_port = usb_get_serial_port_data(serial->port[i]);
2649 kfifo_free(&edge_port->write_fifo);
2650 kfree(edge_port);
2651 usb_set_serial_port_data(serial->port[i], NULL);
2652 }
2653 kfree(edge_serial);
2654 usb_set_serial_data(serial, NULL);
2655 return -ENOMEM;
2656 }
2657
2658 static void edge_disconnect(struct usb_serial *serial)
2659 {
2660 int i;
2661 struct edgeport_port *edge_port;
2662
2663 dbg("%s", __func__);
2664
2665 for (i = 0; i < serial->num_ports; ++i) {
2666 edge_port = usb_get_serial_port_data(serial->port[i]);
2667 edge_remove_sysfs_attrs(edge_port->port);
2668 }
2669 }
2670
2671 static void edge_release(struct usb_serial *serial)
2672 {
2673 int i;
2674 struct edgeport_port *edge_port;
2675
2676 dbg("%s", __func__);
2677
2678 for (i = 0; i < serial->num_ports; ++i) {
2679 edge_port = usb_get_serial_port_data(serial->port[i]);
2680 kfifo_free(&edge_port->write_fifo);
2681 kfree(edge_port);
2682 }
2683 kfree(usb_get_serial_data(serial));
2684 }
2685
2686
2687 /* Sysfs Attributes */
2688
2689 static ssize_t show_uart_mode(struct device *dev,
2690 struct device_attribute *attr, char *buf)
2691 {
2692 struct usb_serial_port *port = to_usb_serial_port(dev);
2693 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2694
2695 return sprintf(buf, "%d\n", edge_port->bUartMode);
2696 }
2697
2698 static ssize_t store_uart_mode(struct device *dev,
2699 struct device_attribute *attr, const char *valbuf, size_t count)
2700 {
2701 struct usb_serial_port *port = to_usb_serial_port(dev);
2702 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2703 unsigned int v = simple_strtoul(valbuf, NULL, 0);
2704
2705 dbg("%s: setting uart_mode = %d", __func__, v);
2706
2707 if (v < 256)
2708 edge_port->bUartMode = v;
2709 else
2710 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2711
2712 return count;
2713 }
2714
2715 static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode,
2716 store_uart_mode);
2717
2718 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2719 {
2720 return device_create_file(&port->dev, &dev_attr_uart_mode);
2721 }
2722
2723 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2724 {
2725 device_remove_file(&port->dev, &dev_attr_uart_mode);
2726 return 0;
2727 }
2728
2729
2730 static struct usb_serial_driver edgeport_1port_device = {
2731 .driver = {
2732 .owner = THIS_MODULE,
2733 .name = "edgeport_ti_1",
2734 },
2735 .description = "Edgeport TI 1 port adapter",
2736 .usb_driver = &io_driver,
2737 .id_table = edgeport_1port_id_table,
2738 .num_ports = 1,
2739 .open = edge_open,
2740 .close = edge_close,
2741 .throttle = edge_throttle,
2742 .unthrottle = edge_unthrottle,
2743 .attach = edge_startup,
2744 .disconnect = edge_disconnect,
2745 .release = edge_release,
2746 .port_probe = edge_create_sysfs_attrs,
2747 .ioctl = edge_ioctl,
2748 .set_termios = edge_set_termios,
2749 .tiocmget = edge_tiocmget,
2750 .tiocmset = edge_tiocmset,
2751 .get_icount = edge_get_icount,
2752 .write = edge_write,
2753 .write_room = edge_write_room,
2754 .chars_in_buffer = edge_chars_in_buffer,
2755 .break_ctl = edge_break,
2756 .read_int_callback = edge_interrupt_callback,
2757 .read_bulk_callback = edge_bulk_in_callback,
2758 .write_bulk_callback = edge_bulk_out_callback,
2759 };
2760
2761 static struct usb_serial_driver edgeport_2port_device = {
2762 .driver = {
2763 .owner = THIS_MODULE,
2764 .name = "edgeport_ti_2",
2765 },
2766 .description = "Edgeport TI 2 port adapter",
2767 .usb_driver = &io_driver,
2768 .id_table = edgeport_2port_id_table,
2769 .num_ports = 2,
2770 .open = edge_open,
2771 .close = edge_close,
2772 .throttle = edge_throttle,
2773 .unthrottle = edge_unthrottle,
2774 .attach = edge_startup,
2775 .disconnect = edge_disconnect,
2776 .release = edge_release,
2777 .port_probe = edge_create_sysfs_attrs,
2778 .ioctl = edge_ioctl,
2779 .set_termios = edge_set_termios,
2780 .tiocmget = edge_tiocmget,
2781 .tiocmset = edge_tiocmset,
2782 .write = edge_write,
2783 .write_room = edge_write_room,
2784 .chars_in_buffer = edge_chars_in_buffer,
2785 .break_ctl = edge_break,
2786 .read_int_callback = edge_interrupt_callback,
2787 .read_bulk_callback = edge_bulk_in_callback,
2788 .write_bulk_callback = edge_bulk_out_callback,
2789 };
2790
2791
2792 static int __init edgeport_init(void)
2793 {
2794 int retval;
2795 retval = usb_serial_register(&edgeport_1port_device);
2796 if (retval)
2797 goto failed_1port_device_register;
2798 retval = usb_serial_register(&edgeport_2port_device);
2799 if (retval)
2800 goto failed_2port_device_register;
2801 retval = usb_register(&io_driver);
2802 if (retval)
2803 goto failed_usb_register;
2804 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2805 DRIVER_DESC "\n");
2806 return 0;
2807 failed_usb_register:
2808 usb_serial_deregister(&edgeport_2port_device);
2809 failed_2port_device_register:
2810 usb_serial_deregister(&edgeport_1port_device);
2811 failed_1port_device_register:
2812 return retval;
2813 }
2814
2815 static void __exit edgeport_exit(void)
2816 {
2817 usb_deregister(&io_driver);
2818 usb_serial_deregister(&edgeport_1port_device);
2819 usb_serial_deregister(&edgeport_2port_device);
2820 }
2821
2822 module_init(edgeport_init);
2823 module_exit(edgeport_exit);
2824
2825 /* Module information */
2826 MODULE_AUTHOR(DRIVER_AUTHOR);
2827 MODULE_DESCRIPTION(DRIVER_DESC);
2828 MODULE_LICENSE("GPL");
2829 MODULE_FIRMWARE("edgeport/down3.bin");
2830
2831 module_param(debug, bool, S_IRUGO | S_IWUSR);
2832 MODULE_PARM_DESC(debug, "Debug enabled or not");
2833
2834 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2835 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2836
2837 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2838 MODULE_PARM_DESC(ignore_cpu_rev,
2839 "Ignore the cpu revision when connecting to a device");
2840
2841 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
2842 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree