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USB: io_ti: query hardware-buffer status in chars_in_buffer
[linux-2.6.git] / drivers / usb / serial / io_ti.c
blob590f27d3bfc1ec27a808e816883ae0600ad82b51
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 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
44 #define DRIVER_DESC "Edgeport USB Serial Driver"
45
46 #define EPROM_PAGE_SIZE 64
47
48
49 /* different hardware types */
50 #define HARDWARE_TYPE_930 0
51 #define HARDWARE_TYPE_TIUMP 1
52
53 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
54 #define TI_MODE_CONFIGURING 0 /* Device has not entered start device */
55 #define TI_MODE_BOOT 1 /* Staying in boot mode */
56 #define TI_MODE_DOWNLOAD 2 /* Made it to download mode */
57 #define TI_MODE_TRANSITIONING 3 /* Currently in boot mode but
58 transitioning to download mode */
59
60 /* read urb state */
61 #define EDGE_READ_URB_RUNNING 0
62 #define EDGE_READ_URB_STOPPING 1
63 #define EDGE_READ_URB_STOPPED 2
64
65 #define EDGE_CLOSING_WAIT 4000 /* in .01 sec */
66
67 #define EDGE_OUT_BUF_SIZE 1024
68
69
70 /* Product information read from the Edgeport */
71 struct product_info {
72 int TiMode; /* Current TI Mode */
73 __u8 hardware_type; /* Type of hardware */
74 } __attribute__((packed));
75
76 struct edgeport_port {
77 __u16 uart_base;
78 __u16 dma_address;
79 __u8 shadow_msr;
80 __u8 shadow_mcr;
81 __u8 shadow_lsr;
82 __u8 lsr_mask;
83 __u32 ump_read_timeout; /* Number of milliseconds the UMP will
84 wait without data before completing
85 a read short */
86 int baud_rate;
87 int close_pending;
88 int lsr_event;
89 struct async_icount icount;
90 wait_queue_head_t delta_msr_wait; /* for handling sleeping while
91 waiting for msr change to
92 happen */
93 struct edgeport_serial *edge_serial;
94 struct usb_serial_port *port;
95 __u8 bUartMode; /* Port type, 0: RS232, etc. */
96 spinlock_t ep_lock;
97 int ep_read_urb_state;
98 int ep_write_urb_in_use;
99 struct kfifo write_fifo;
100 };
101
102 struct edgeport_serial {
103 struct product_info product_info;
104 u8 TI_I2C_Type; /* Type of I2C in UMP */
105 u8 TiReadI2C; /* Set to TRUE if we have read the
106 I2c in Boot Mode */
107 struct mutex es_lock;
108 int num_ports_open;
109 struct usb_serial *serial;
110 };
111
112
113 /* Devices that this driver supports */
114 static const struct usb_device_id edgeport_1port_id_table[] = {
115 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
116 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
117 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
118 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
119 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
120 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
121 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
122 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
123 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
124 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
125 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
126 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
127 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
128 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
129 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
130 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
131 { }
132 };
133
134 static const struct usb_device_id edgeport_2port_id_table[] = {
135 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
136 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
137 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
138 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
139 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
140 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
141 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
142 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
143 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
144 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
145 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
146 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
147 /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
148 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
149 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
150 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
151 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
152 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
153 { }
154 };
155
156 /* Devices that this driver supports */
157 static const struct usb_device_id id_table_combined[] = {
158 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
159 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
160 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
161 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
162 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
163 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
164 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
165 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
166 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
167 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
168 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
169 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
170 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
171 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
172 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
173 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
174 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
175 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
176 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
177 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
178 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
179 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
180 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
181 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
182 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
183 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
184 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
185 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
186 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
187 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
188 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
189 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
190 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
191 { }
192 };
193
194 MODULE_DEVICE_TABLE(usb, id_table_combined);
195
196 static unsigned char OperationalMajorVersion;
197 static unsigned char OperationalMinorVersion;
198 static unsigned short OperationalBuildNumber;
199
200 static int closing_wait = EDGE_CLOSING_WAIT;
201 static bool ignore_cpu_rev;
202 static int default_uart_mode; /* RS232 */
203
204 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
205 unsigned char *data, int length);
206
207 static void stop_read(struct edgeport_port *edge_port);
208 static int restart_read(struct edgeport_port *edge_port);
209
210 static void edge_set_termios(struct tty_struct *tty,
211 struct usb_serial_port *port, struct ktermios *old_termios);
212 static void edge_send(struct tty_struct *tty);
213
214 /* sysfs attributes */
215 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
216 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
217
218
219 static int ti_vread_sync(struct usb_device *dev, __u8 request,
220 __u16 value, __u16 index, u8 *data, int size)
221 {
222 int status;
223
224 status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
225 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
226 value, index, data, size, 1000);
227 if (status < 0)
228 return status;
229 if (status != size) {
230 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
231 __func__, size, status);
232 return -ECOMM;
233 }
234 return 0;
235 }
236
237 static int ti_vsend_sync(struct usb_device *dev, __u8 request,
238 __u16 value, __u16 index, u8 *data, int size)
239 {
240 int status;
241
242 status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
243 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
244 value, index, data, size, 1000);
245 if (status < 0)
246 return status;
247 if (status != size) {
248 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
249 __func__, size, status);
250 return -ECOMM;
251 }
252 return 0;
253 }
254
255 static int send_cmd(struct usb_device *dev, __u8 command,
256 __u8 moduleid, __u16 value, u8 *data,
257 int size)
258 {
259 return ti_vsend_sync(dev, command, value, moduleid, data, size);
260 }
261
262 /* clear tx/rx buffers and fifo in TI UMP */
263 static int purge_port(struct usb_serial_port *port, __u16 mask)
264 {
265 int port_number = port->number - port->serial->minor;
266
267 dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask);
268
269 return send_cmd(port->serial->dev,
270 UMPC_PURGE_PORT,
271 (__u8)(UMPM_UART1_PORT + port_number),
272 mask,
273 NULL,
274 0);
275 }
276
277 /**
278 * read_download_mem - Read edgeport memory from TI chip
279 * @dev: usb device pointer
280 * @start_address: Device CPU address at which to read
281 * @length: Length of above data
282 * @address_type: Can read both XDATA and I2C
283 * @buffer: pointer to input data buffer
284 */
285 static int read_download_mem(struct usb_device *dev, int start_address,
286 int length, __u8 address_type, __u8 *buffer)
287 {
288 int status = 0;
289 __u8 read_length;
290 __be16 be_start_address;
291
292 dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length);
293
294 /* Read in blocks of 64 bytes
295 * (TI firmware can't handle more than 64 byte reads)
296 */
297 while (length) {
298 if (length > 64)
299 read_length = 64;
300 else
301 read_length = (__u8)length;
302
303 if (read_length > 1) {
304 dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length);
305 }
306 be_start_address = cpu_to_be16(start_address);
307 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
308 (__u16)address_type,
309 (__force __u16)be_start_address,
310 buffer, read_length);
311
312 if (status) {
313 dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status);
314 return status;
315 }
316
317 if (read_length > 1)
318 usb_serial_debug_data(&dev->dev, __func__, read_length, buffer);
319
320 /* Update pointers/length */
321 start_address += read_length;
322 buffer += read_length;
323 length -= read_length;
324 }
325
326 return status;
327 }
328
329 static int read_ram(struct usb_device *dev, int start_address,
330 int length, __u8 *buffer)
331 {
332 return read_download_mem(dev, start_address, length,
333 DTK_ADDR_SPACE_XDATA, buffer);
334 }
335
336 /* Read edgeport memory to a given block */
337 static int read_boot_mem(struct edgeport_serial *serial,
338 int start_address, int length, __u8 *buffer)
339 {
340 int status = 0;
341 int i;
342
343 for (i = 0; i < length; i++) {
344 status = ti_vread_sync(serial->serial->dev,
345 UMPC_MEMORY_READ, serial->TI_I2C_Type,
346 (__u16)(start_address+i), &buffer[i], 0x01);
347 if (status) {
348 dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status);
349 return status;
350 }
351 }
352
353 dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n",
354 __func__, start_address, length);
355 usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
356
357 serial->TiReadI2C = 1;
358
359 return status;
360 }
361
362 /* Write given block to TI EPROM memory */
363 static int write_boot_mem(struct edgeport_serial *serial,
364 int start_address, int length, __u8 *buffer)
365 {
366 int status = 0;
367 int i;
368 u8 *temp;
369
370 /* Must do a read before write */
371 if (!serial->TiReadI2C) {
372 temp = kmalloc(1, GFP_KERNEL);
373 if (!temp) {
374 dev_err(&serial->serial->dev->dev,
375 "%s - out of memory\n", __func__);
376 return -ENOMEM;
377 }
378 status = read_boot_mem(serial, 0, 1, temp);
379 kfree(temp);
380 if (status)
381 return status;
382 }
383
384 for (i = 0; i < length; ++i) {
385 status = ti_vsend_sync(serial->serial->dev,
386 UMPC_MEMORY_WRITE, buffer[i],
387 (__u16)(i + start_address), NULL, 0);
388 if (status)
389 return status;
390 }
391
392 dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length);
393 usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
394
395 return status;
396 }
397
398
399 /* Write edgeport I2C memory to TI chip */
400 static int write_i2c_mem(struct edgeport_serial *serial,
401 int start_address, int length, __u8 address_type, __u8 *buffer)
402 {
403 struct device *dev = &serial->serial->dev->dev;
404 int status = 0;
405 int write_length;
406 __be16 be_start_address;
407
408 /* We can only send a maximum of 1 aligned byte page at a time */
409
410 /* calculate the number of bytes left in the first page */
411 write_length = EPROM_PAGE_SIZE -
412 (start_address & (EPROM_PAGE_SIZE - 1));
413
414 if (write_length > length)
415 write_length = length;
416
417 dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n",
418 __func__, start_address, write_length);
419 usb_serial_debug_data(dev, __func__, write_length, buffer);
420
421 /* Write first page */
422 be_start_address = cpu_to_be16(start_address);
423 status = ti_vsend_sync(serial->serial->dev,
424 UMPC_MEMORY_WRITE, (__u16)address_type,
425 (__force __u16)be_start_address,
426 buffer, write_length);
427 if (status) {
428 dev_dbg(dev, "%s - ERROR %d\n", __func__, status);
429 return status;
430 }
431
432 length -= write_length;
433 start_address += write_length;
434 buffer += write_length;
435
436 /* We should be aligned now -- can write
437 max page size bytes at a time */
438 while (length) {
439 if (length > EPROM_PAGE_SIZE)
440 write_length = EPROM_PAGE_SIZE;
441 else
442 write_length = length;
443
444 dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n",
445 __func__, start_address, write_length);
446 usb_serial_debug_data(dev, __func__, write_length, buffer);
447
448 /* Write next page */
449 be_start_address = cpu_to_be16(start_address);
450 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
451 (__u16)address_type,
452 (__force __u16)be_start_address,
453 buffer, write_length);
454 if (status) {
455 dev_err(dev, "%s - ERROR %d\n", __func__, status);
456 return status;
457 }
458
459 length -= write_length;
460 start_address += write_length;
461 buffer += write_length;
462 }
463 return status;
464 }
465
466 /* Examine the UMP DMA registers and LSR
467 *
468 * Check the MSBit of the X and Y DMA byte count registers.
469 * A zero in this bit indicates that the TX DMA buffers are empty
470 * then check the TX Empty bit in the UART.
471 */
472 static int tx_active(struct edgeport_port *port)
473 {
474 int status;
475 struct out_endpoint_desc_block *oedb;
476 __u8 *lsr;
477 int bytes_left = 0;
478
479 oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
480 if (!oedb) {
481 dev_err(&port->port->dev, "%s - out of memory\n", __func__);
482 return -ENOMEM;
483 }
484
485 lsr = kmalloc(1, GFP_KERNEL); /* Sigh, that's right, just one byte,
486 as not all platforms can do DMA
487 from stack */
488 if (!lsr) {
489 kfree(oedb);
490 return -ENOMEM;
491 }
492 /* Read the DMA Count Registers */
493 status = read_ram(port->port->serial->dev, port->dma_address,
494 sizeof(*oedb), (void *)oedb);
495 if (status)
496 goto exit_is_tx_active;
497
498 dev_dbg(&port->port->dev, "%s - XByteCount 0x%X\n", __func__, oedb->XByteCount);
499
500 /* and the LSR */
501 status = read_ram(port->port->serial->dev,
502 port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
503
504 if (status)
505 goto exit_is_tx_active;
506 dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr);
507
508 /* If either buffer has data or we are transmitting then return TRUE */
509 if ((oedb->XByteCount & 0x80) != 0)
510 bytes_left += 64;
511
512 if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
513 bytes_left += 1;
514
515 /* We return Not Active if we get any kind of error */
516 exit_is_tx_active:
517 dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left);
518
519 kfree(lsr);
520 kfree(oedb);
521 return bytes_left;
522 }
523
524 static void chase_port(struct edgeport_port *port, unsigned long timeout)
525 {
526 struct tty_struct *tty = tty_port_tty_get(&port->port->port);
527 struct usb_serial *serial = port->port->serial;
528 wait_queue_t wait;
529 unsigned long flags;
530
531 if (!timeout)
532 timeout = (HZ * EDGE_CLOSING_WAIT)/100;
533
534 /* wait for data to drain from the buffer */
535 spin_lock_irqsave(&port->ep_lock, flags);
536 init_waitqueue_entry(&wait, current);
537 add_wait_queue(&tty->write_wait, &wait);
538 for (;;) {
539 set_current_state(TASK_INTERRUPTIBLE);
540 if (kfifo_len(&port->write_fifo) == 0
541 || timeout == 0 || signal_pending(current)
542 || serial->disconnected)
543 /* disconnect */
544 break;
545 spin_unlock_irqrestore(&port->ep_lock, flags);
546 timeout = schedule_timeout(timeout);
547 spin_lock_irqsave(&port->ep_lock, flags);
548 }
549 set_current_state(TASK_RUNNING);
550 remove_wait_queue(&tty->write_wait, &wait);
551 spin_unlock_irqrestore(&port->ep_lock, flags);
552 tty_kref_put(tty);
553
554 /* wait for data to drain from the device */
555 timeout += jiffies;
556 while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
557 && !serial->disconnected) {
558 /* not disconnected */
559 if (!tx_active(port))
560 break;
561 msleep(10);
562 }
563 }
564
565 static int choose_config(struct usb_device *dev)
566 {
567 /*
568 * There may be multiple configurations on this device, in which case
569 * we would need to read and parse all of them to find out which one
570 * we want. However, we just support one config at this point,
571 * configuration # 1, which is Config Descriptor 0.
572 */
573
574 dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n",
575 __func__, dev->config->desc.bNumInterfaces);
576 dev_dbg(&dev->dev, "%s - MAX Power = %d\n",
577 __func__, dev->config->desc.bMaxPower * 2);
578
579 if (dev->config->desc.bNumInterfaces != 1) {
580 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__);
581 return -ENODEV;
582 }
583
584 return 0;
585 }
586
587 static int read_rom(struct edgeport_serial *serial,
588 int start_address, int length, __u8 *buffer)
589 {
590 int status;
591
592 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
593 status = read_download_mem(serial->serial->dev,
594 start_address,
595 length,
596 serial->TI_I2C_Type,
597 buffer);
598 } else {
599 status = read_boot_mem(serial, start_address, length,
600 buffer);
601 }
602 return status;
603 }
604
605 static int write_rom(struct edgeport_serial *serial, int start_address,
606 int length, __u8 *buffer)
607 {
608 if (serial->product_info.TiMode == TI_MODE_BOOT)
609 return write_boot_mem(serial, start_address, length,
610 buffer);
611
612 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
613 return write_i2c_mem(serial, start_address, length,
614 serial->TI_I2C_Type, buffer);
615 return -EINVAL;
616 }
617
618
619
620 /* Read a descriptor header from I2C based on type */
621 static int get_descriptor_addr(struct edgeport_serial *serial,
622 int desc_type, struct ti_i2c_desc *rom_desc)
623 {
624 int start_address;
625 int status;
626
627 /* Search for requested descriptor in I2C */
628 start_address = 2;
629 do {
630 status = read_rom(serial,
631 start_address,
632 sizeof(struct ti_i2c_desc),
633 (__u8 *)rom_desc);
634 if (status)
635 return 0;
636
637 if (rom_desc->Type == desc_type)
638 return start_address;
639
640 start_address = start_address + sizeof(struct ti_i2c_desc)
641 + rom_desc->Size;
642
643 } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
644
645 return 0;
646 }
647
648 /* Validate descriptor checksum */
649 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
650 {
651 __u16 i;
652 __u8 cs = 0;
653
654 for (i = 0; i < rom_desc->Size; i++)
655 cs = (__u8)(cs + buffer[i]);
656
657 if (cs != rom_desc->CheckSum) {
658 pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
659 return -EINVAL;
660 }
661 return 0;
662 }
663
664 /* Make sure that the I2C image is good */
665 static int check_i2c_image(struct edgeport_serial *serial)
666 {
667 struct device *dev = &serial->serial->dev->dev;
668 int status = 0;
669 struct ti_i2c_desc *rom_desc;
670 int start_address = 2;
671 __u8 *buffer;
672 __u16 ttype;
673
674 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
675 if (!rom_desc) {
676 dev_err(dev, "%s - out of memory\n", __func__);
677 return -ENOMEM;
678 }
679 buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
680 if (!buffer) {
681 dev_err(dev, "%s - out of memory when allocating buffer\n",
682 __func__);
683 kfree(rom_desc);
684 return -ENOMEM;
685 }
686
687 /* Read the first byte (Signature0) must be 0x52 or 0x10 */
688 status = read_rom(serial, 0, 1, buffer);
689 if (status)
690 goto out;
691
692 if (*buffer != UMP5152 && *buffer != UMP3410) {
693 dev_err(dev, "%s - invalid buffer signature\n", __func__);
694 status = -ENODEV;
695 goto out;
696 }
697
698 do {
699 /* Validate the I2C */
700 status = read_rom(serial,
701 start_address,
702 sizeof(struct ti_i2c_desc),
703 (__u8 *)rom_desc);
704 if (status)
705 break;
706
707 if ((start_address + sizeof(struct ti_i2c_desc) +
708 rom_desc->Size) > TI_MAX_I2C_SIZE) {
709 status = -ENODEV;
710 dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__);
711 break;
712 }
713
714 dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type);
715
716 /* Skip type 2 record */
717 ttype = rom_desc->Type & 0x0f;
718 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
719 && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
720 /* Read the descriptor data */
721 status = read_rom(serial, start_address +
722 sizeof(struct ti_i2c_desc),
723 rom_desc->Size, buffer);
724 if (status)
725 break;
726
727 status = valid_csum(rom_desc, buffer);
728 if (status)
729 break;
730 }
731 start_address = start_address + sizeof(struct ti_i2c_desc) +
732 rom_desc->Size;
733
734 } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
735 (start_address < TI_MAX_I2C_SIZE));
736
737 if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
738 (start_address > TI_MAX_I2C_SIZE))
739 status = -ENODEV;
740
741 out:
742 kfree(buffer);
743 kfree(rom_desc);
744 return status;
745 }
746
747 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
748 {
749 int status;
750 int start_address;
751 struct ti_i2c_desc *rom_desc;
752 struct edge_ti_manuf_descriptor *desc;
753 struct device *dev = &serial->serial->dev->dev;
754
755 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
756 if (!rom_desc) {
757 dev_err(dev, "%s - out of memory\n", __func__);
758 return -ENOMEM;
759 }
760 start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
761 rom_desc);
762
763 if (!start_address) {
764 dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__);
765 status = -ENODEV;
766 goto exit;
767 }
768
769 /* Read the descriptor data */
770 status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
771 rom_desc->Size, buffer);
772 if (status)
773 goto exit;
774
775 status = valid_csum(rom_desc, buffer);
776
777 desc = (struct edge_ti_manuf_descriptor *)buffer;
778 dev_dbg(dev, "%s - IonConfig 0x%x\n", __func__, desc->IonConfig);
779 dev_dbg(dev, "%s - Version %d\n", __func__, desc->Version);
780 dev_dbg(dev, "%s - Cpu/Board 0x%x\n", __func__, desc->CpuRev_BoardRev);
781 dev_dbg(dev, "%s - NumPorts %d\n", __func__, desc->NumPorts);
782 dev_dbg(dev, "%s - NumVirtualPorts %d\n", __func__, desc->NumVirtualPorts);
783 dev_dbg(dev, "%s - TotalPorts %d\n", __func__, desc->TotalPorts);
784
785 exit:
786 kfree(rom_desc);
787 return status;
788 }
789
790 /* Build firmware header used for firmware update */
791 static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
792 {
793 __u8 *buffer;
794 int buffer_size;
795 int i;
796 int err;
797 __u8 cs = 0;
798 struct ti_i2c_desc *i2c_header;
799 struct ti_i2c_image_header *img_header;
800 struct ti_i2c_firmware_rec *firmware_rec;
801 const struct firmware *fw;
802 const char *fw_name = "edgeport/down3.bin";
803
804 /* In order to update the I2C firmware we must change the type 2 record
805 * to type 0xF2. This will force the UMP to come up in Boot Mode.
806 * Then while in boot mode, the driver will download the latest
807 * firmware (padded to 15.5k) into the UMP ram. And finally when the
808 * device comes back up in download mode the driver will cause the new
809 * firmware to be copied from the UMP Ram to I2C and the firmware will
810 * update the record type from 0xf2 to 0x02.
811 */
812
813 /* Allocate a 15.5k buffer + 2 bytes for version number
814 * (Firmware Record) */
815 buffer_size = (((1024 * 16) - 512 ) +
816 sizeof(struct ti_i2c_firmware_rec));
817
818 buffer = kmalloc(buffer_size, GFP_KERNEL);
819 if (!buffer) {
820 dev_err(dev, "%s - out of memory\n", __func__);
821 return -ENOMEM;
822 }
823
824 // Set entire image of 0xffs
825 memset(buffer, 0xff, buffer_size);
826
827 err = request_firmware(&fw, fw_name, dev);
828 if (err) {
829 dev_err(dev, "Failed to load image \"%s\" err %d\n",
830 fw_name, err);
831 kfree(buffer);
832 return err;
833 }
834
835 /* Save Download Version Number */
836 OperationalMajorVersion = fw->data[0];
837 OperationalMinorVersion = fw->data[1];
838 OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
839
840 /* Copy version number into firmware record */
841 firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
842
843 firmware_rec->Ver_Major = OperationalMajorVersion;
844 firmware_rec->Ver_Minor = OperationalMinorVersion;
845
846 /* Pointer to fw_down memory image */
847 img_header = (struct ti_i2c_image_header *)&fw->data[4];
848
849 memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
850 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
851 le16_to_cpu(img_header->Length));
852
853 release_firmware(fw);
854
855 for (i=0; i < buffer_size; i++) {
856 cs = (__u8)(cs + buffer[i]);
857 }
858
859 kfree(buffer);
860
861 /* Build new header */
862 i2c_header = (struct ti_i2c_desc *)header;
863 firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data;
864
865 i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK;
866 i2c_header->Size = (__u16)buffer_size;
867 i2c_header->CheckSum = cs;
868 firmware_rec->Ver_Major = OperationalMajorVersion;
869 firmware_rec->Ver_Minor = OperationalMinorVersion;
870
871 return 0;
872 }
873
874 /* Try to figure out what type of I2c we have */
875 static int i2c_type_bootmode(struct edgeport_serial *serial)
876 {
877 struct device *dev = &serial->serial->dev->dev;
878 int status;
879 u8 *data;
880
881 data = kmalloc(1, GFP_KERNEL);
882 if (!data) {
883 dev_err(dev, "%s - out of memory\n", __func__);
884 return -ENOMEM;
885 }
886
887 /* Try to read type 2 */
888 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
889 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
890 if (status)
891 dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status);
892 else
893 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
894 if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
895 dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__);
896 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
897 goto out;
898 }
899
900 /* Try to read type 3 */
901 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
902 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
903 if (status)
904 dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status);
905 else
906 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
907 if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
908 dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__);
909 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
910 goto out;
911 }
912
913 dev_dbg(dev, "%s - Unknown\n", __func__);
914 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
915 status = -ENODEV;
916 out:
917 kfree(data);
918 return status;
919 }
920
921 static int bulk_xfer(struct usb_serial *serial, void *buffer,
922 int length, int *num_sent)
923 {
924 int status;
925
926 status = usb_bulk_msg(serial->dev,
927 usb_sndbulkpipe(serial->dev,
928 serial->port[0]->bulk_out_endpointAddress),
929 buffer, length, num_sent, 1000);
930 return status;
931 }
932
933 /* Download given firmware image to the device (IN BOOT MODE) */
934 static int download_code(struct edgeport_serial *serial, __u8 *image,
935 int image_length)
936 {
937 int status = 0;
938 int pos;
939 int transfer;
940 int done;
941
942 /* Transfer firmware image */
943 for (pos = 0; pos < image_length; ) {
944 /* Read the next buffer from file */
945 transfer = image_length - pos;
946 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
947 transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
948
949 /* Transfer data */
950 status = bulk_xfer(serial->serial, &image[pos],
951 transfer, &done);
952 if (status)
953 break;
954 /* Advance buffer pointer */
955 pos += done;
956 }
957
958 return status;
959 }
960
961 /* FIXME!!! */
962 static int config_boot_dev(struct usb_device *dev)
963 {
964 return 0;
965 }
966
967 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
968 {
969 return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
970 }
971
972 /**
973 * DownloadTIFirmware - Download run-time operating firmware to the TI5052
974 *
975 * This routine downloads the main operating code into the TI5052, using the
976 * boot code already burned into E2PROM or ROM.
977 */
978 static int download_fw(struct edgeport_serial *serial)
979 {
980 struct device *dev = &serial->serial->dev->dev;
981 int status = 0;
982 int start_address;
983 struct edge_ti_manuf_descriptor *ti_manuf_desc;
984 struct usb_interface_descriptor *interface;
985 int download_cur_ver;
986 int download_new_ver;
987
988 /* This routine is entered by both the BOOT mode and the Download mode
989 * We can determine which code is running by the reading the config
990 * descriptor and if we have only one bulk pipe it is in boot mode
991 */
992 serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
993
994 /* Default to type 2 i2c */
995 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
996
997 status = choose_config(serial->serial->dev);
998 if (status)
999 return status;
1000
1001 interface = &serial->serial->interface->cur_altsetting->desc;
1002 if (!interface) {
1003 dev_err(dev, "%s - no interface set, error!\n", __func__);
1004 return -ENODEV;
1005 }
1006
1007 /*
1008 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1009 * if we have more than one endpoint we are definitely in download
1010 * mode
1011 */
1012 if (interface->bNumEndpoints > 1)
1013 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1014 else
1015 /* Otherwise we will remain in configuring mode */
1016 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1017
1018 /********************************************************************/
1019 /* Download Mode */
1020 /********************************************************************/
1021 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
1022 struct ti_i2c_desc *rom_desc;
1023
1024 dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__);
1025
1026 status = check_i2c_image(serial);
1027 if (status) {
1028 dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__);
1029 return status;
1030 }
1031
1032 /* Validate Hardware version number
1033 * Read Manufacturing Descriptor from TI Based Edgeport
1034 */
1035 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1036 if (!ti_manuf_desc) {
1037 dev_err(dev, "%s - out of memory.\n", __func__);
1038 return -ENOMEM;
1039 }
1040 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1041 if (status) {
1042 kfree(ti_manuf_desc);
1043 return status;
1044 }
1045
1046 /* Check version number of ION descriptor */
1047 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1048 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1049 __func__, ti_cpu_rev(ti_manuf_desc));
1050 kfree(ti_manuf_desc);
1051 return -EINVAL;
1052 }
1053
1054 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1055 if (!rom_desc) {
1056 dev_err(dev, "%s - out of memory.\n", __func__);
1057 kfree(ti_manuf_desc);
1058 return -ENOMEM;
1059 }
1060
1061 /* Search for type 2 record (firmware record) */
1062 start_address = get_descriptor_addr(serial,
1063 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1064 if (start_address != 0) {
1065 struct ti_i2c_firmware_rec *firmware_version;
1066 u8 *record;
1067
1068 dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n", __func__);
1069
1070 firmware_version = kmalloc(sizeof(*firmware_version),
1071 GFP_KERNEL);
1072 if (!firmware_version) {
1073 dev_err(dev, "%s - out of memory.\n", __func__);
1074 kfree(rom_desc);
1075 kfree(ti_manuf_desc);
1076 return -ENOMEM;
1077 }
1078
1079 /* Validate version number
1080 * Read the descriptor data
1081 */
1082 status = read_rom(serial, start_address +
1083 sizeof(struct ti_i2c_desc),
1084 sizeof(struct ti_i2c_firmware_rec),
1085 (__u8 *)firmware_version);
1086 if (status) {
1087 kfree(firmware_version);
1088 kfree(rom_desc);
1089 kfree(ti_manuf_desc);
1090 return status;
1091 }
1092
1093 /* Check version number of download with current
1094 version in I2c */
1095 download_cur_ver = (firmware_version->Ver_Major << 8) +
1096 (firmware_version->Ver_Minor);
1097 download_new_ver = (OperationalMajorVersion << 8) +
1098 (OperationalMinorVersion);
1099
1100 dev_dbg(dev, "%s - >> FW Versions Device %d.%d Driver %d.%d\n",
1101 __func__, firmware_version->Ver_Major,
1102 firmware_version->Ver_Minor,
1103 OperationalMajorVersion,
1104 OperationalMinorVersion);
1105
1106 /* Check if we have an old version in the I2C and
1107 update if necessary */
1108 if (download_cur_ver < download_new_ver) {
1109 dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n",
1110 __func__,
1111 firmware_version->Ver_Major,
1112 firmware_version->Ver_Minor,
1113 OperationalMajorVersion,
1114 OperationalMinorVersion);
1115
1116 record = kmalloc(1, GFP_KERNEL);
1117 if (!record) {
1118 dev_err(dev, "%s - out of memory.\n",
1119 __func__);
1120 kfree(firmware_version);
1121 kfree(rom_desc);
1122 kfree(ti_manuf_desc);
1123 return -ENOMEM;
1124 }
1125 /* In order to update the I2C firmware we must
1126 * change the type 2 record to type 0xF2. This
1127 * will force the UMP to come up in Boot Mode.
1128 * Then while in boot mode, the driver will
1129 * download the latest firmware (padded to
1130 * 15.5k) into the UMP ram. Finally when the
1131 * device comes back up in download mode the
1132 * driver will cause the new firmware to be
1133 * copied from the UMP Ram to I2C and the
1134 * firmware will update the record type from
1135 * 0xf2 to 0x02.
1136 */
1137 *record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1138
1139 /* Change the I2C Firmware record type to
1140 0xf2 to trigger an update */
1141 status = write_rom(serial, start_address,
1142 sizeof(*record), record);
1143 if (status) {
1144 kfree(record);
1145 kfree(firmware_version);
1146 kfree(rom_desc);
1147 kfree(ti_manuf_desc);
1148 return status;
1149 }
1150
1151 /* verify the write -- must do this in order
1152 * for write to complete before we do the
1153 * hardware reset
1154 */
1155 status = read_rom(serial,
1156 start_address,
1157 sizeof(*record),
1158 record);
1159 if (status) {
1160 kfree(record);
1161 kfree(firmware_version);
1162 kfree(rom_desc);
1163 kfree(ti_manuf_desc);
1164 return status;
1165 }
1166
1167 if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1168 dev_err(dev, "%s - error resetting device\n", __func__);
1169 kfree(record);
1170 kfree(firmware_version);
1171 kfree(rom_desc);
1172 kfree(ti_manuf_desc);
1173 return -ENODEV;
1174 }
1175
1176 dev_dbg(dev, "%s - HARDWARE RESET\n", __func__);
1177
1178 /* Reset UMP -- Back to BOOT MODE */
1179 status = ti_vsend_sync(serial->serial->dev,
1180 UMPC_HARDWARE_RESET,
1181 0, 0, NULL, 0);
1182
1183 dev_dbg(dev, "%s - HARDWARE RESET return %d\n", __func__, status);
1184
1185 /* return an error on purpose. */
1186 kfree(record);
1187 kfree(firmware_version);
1188 kfree(rom_desc);
1189 kfree(ti_manuf_desc);
1190 return -ENODEV;
1191 }
1192 kfree(firmware_version);
1193 }
1194 /* Search for type 0xF2 record (firmware blank record) */
1195 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1196 #define HEADER_SIZE (sizeof(struct ti_i2c_desc) + \
1197 sizeof(struct ti_i2c_firmware_rec))
1198 __u8 *header;
1199 __u8 *vheader;
1200
1201 header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1202 if (!header) {
1203 dev_err(dev, "%s - out of memory.\n", __func__);
1204 kfree(rom_desc);
1205 kfree(ti_manuf_desc);
1206 return -ENOMEM;
1207 }
1208
1209 vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1210 if (!vheader) {
1211 dev_err(dev, "%s - out of memory.\n", __func__);
1212 kfree(header);
1213 kfree(rom_desc);
1214 kfree(ti_manuf_desc);
1215 return -ENOMEM;
1216 }
1217
1218 dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n", __func__);
1219
1220 /*
1221 * In order to update the I2C firmware we must change
1222 * the type 2 record to type 0xF2. This will force the
1223 * UMP to come up in Boot Mode. Then while in boot
1224 * mode, the driver will download the latest firmware
1225 * (padded to 15.5k) into the UMP ram. Finally when the
1226 * device comes back up in download mode the driver
1227 * will cause the new firmware to be copied from the
1228 * UMP Ram to I2C and the firmware will update the
1229 * record type from 0xf2 to 0x02.
1230 */
1231 status = build_i2c_fw_hdr(header, dev);
1232 if (status) {
1233 kfree(vheader);
1234 kfree(header);
1235 kfree(rom_desc);
1236 kfree(ti_manuf_desc);
1237 return -EINVAL;
1238 }
1239
1240 /* Update I2C with type 0xf2 record with correct
1241 size and checksum */
1242 status = write_rom(serial,
1243 start_address,
1244 HEADER_SIZE,
1245 header);
1246 if (status) {
1247 kfree(vheader);
1248 kfree(header);
1249 kfree(rom_desc);
1250 kfree(ti_manuf_desc);
1251 return -EINVAL;
1252 }
1253
1254 /* verify the write -- must do this in order for
1255 write to complete before we do the hardware reset */
1256 status = read_rom(serial, start_address,
1257 HEADER_SIZE, vheader);
1258
1259 if (status) {
1260 dev_dbg(dev, "%s - can't read header back\n", __func__);
1261 kfree(vheader);
1262 kfree(header);
1263 kfree(rom_desc);
1264 kfree(ti_manuf_desc);
1265 return status;
1266 }
1267 if (memcmp(vheader, header, HEADER_SIZE)) {
1268 dev_dbg(dev, "%s - write download record failed\n", __func__);
1269 kfree(vheader);
1270 kfree(header);
1271 kfree(rom_desc);
1272 kfree(ti_manuf_desc);
1273 return -EINVAL;
1274 }
1275
1276 kfree(vheader);
1277 kfree(header);
1278
1279 dev_dbg(dev, "%s - Start firmware update\n", __func__);
1280
1281 /* Tell firmware to copy download image into I2C */
1282 status = ti_vsend_sync(serial->serial->dev,
1283 UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0);
1284
1285 dev_dbg(dev, "%s - Update complete 0x%x\n", __func__, status);
1286 if (status) {
1287 dev_err(dev,
1288 "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1289 __func__);
1290 kfree(rom_desc);
1291 kfree(ti_manuf_desc);
1292 return status;
1293 }
1294 }
1295
1296 // The device is running the download code
1297 kfree(rom_desc);
1298 kfree(ti_manuf_desc);
1299 return 0;
1300 }
1301
1302 /********************************************************************/
1303 /* Boot Mode */
1304 /********************************************************************/
1305 dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__);
1306
1307 /* Configure the TI device so we can use the BULK pipes for download */
1308 status = config_boot_dev(serial->serial->dev);
1309 if (status)
1310 return status;
1311
1312 if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1313 != USB_VENDOR_ID_ION) {
1314 dev_dbg(dev, "%s - VID = 0x%x\n", __func__,
1315 le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1316 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1317 goto stayinbootmode;
1318 }
1319
1320 /* We have an ION device (I2c Must be programmed)
1321 Determine I2C image type */
1322 if (i2c_type_bootmode(serial))
1323 goto stayinbootmode;
1324
1325 /* Check for ION Vendor ID and that the I2C is valid */
1326 if (!check_i2c_image(serial)) {
1327 struct ti_i2c_image_header *header;
1328 int i;
1329 __u8 cs = 0;
1330 __u8 *buffer;
1331 int buffer_size;
1332 int err;
1333 const struct firmware *fw;
1334 const char *fw_name = "edgeport/down3.bin";
1335
1336 /* Validate Hardware version number
1337 * Read Manufacturing Descriptor from TI Based Edgeport
1338 */
1339 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1340 if (!ti_manuf_desc) {
1341 dev_err(dev, "%s - out of memory.\n", __func__);
1342 return -ENOMEM;
1343 }
1344 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1345 if (status) {
1346 kfree(ti_manuf_desc);
1347 goto stayinbootmode;
1348 }
1349
1350 /* Check for version 2 */
1351 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1352 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1353 __func__, ti_cpu_rev(ti_manuf_desc));
1354 kfree(ti_manuf_desc);
1355 goto stayinbootmode;
1356 }
1357
1358 kfree(ti_manuf_desc);
1359
1360 /*
1361 * In order to update the I2C firmware we must change the type
1362 * 2 record to type 0xF2. This will force the UMP to come up
1363 * in Boot Mode. Then while in boot mode, the driver will
1364 * download the latest firmware (padded to 15.5k) into the
1365 * UMP ram. Finally when the device comes back up in download
1366 * mode the driver will cause the new firmware to be copied
1367 * from the UMP Ram to I2C and the firmware will update the
1368 * record type from 0xf2 to 0x02.
1369 *
1370 * Do we really have to copy the whole firmware image,
1371 * or could we do this in place!
1372 */
1373
1374 /* Allocate a 15.5k buffer + 3 byte header */
1375 buffer_size = (((1024 * 16) - 512) +
1376 sizeof(struct ti_i2c_image_header));
1377 buffer = kmalloc(buffer_size, GFP_KERNEL);
1378 if (!buffer) {
1379 dev_err(dev, "%s - out of memory\n", __func__);
1380 return -ENOMEM;
1381 }
1382
1383 /* Initialize the buffer to 0xff (pad the buffer) */
1384 memset(buffer, 0xff, buffer_size);
1385
1386 err = request_firmware(&fw, fw_name, dev);
1387 if (err) {
1388 dev_err(dev, "Failed to load image \"%s\" err %d\n",
1389 fw_name, err);
1390 kfree(buffer);
1391 return err;
1392 }
1393 memcpy(buffer, &fw->data[4], fw->size - 4);
1394 release_firmware(fw);
1395
1396 for (i = sizeof(struct ti_i2c_image_header);
1397 i < buffer_size; i++) {
1398 cs = (__u8)(cs + buffer[i]);
1399 }
1400
1401 header = (struct ti_i2c_image_header *)buffer;
1402
1403 /* update length and checksum after padding */
1404 header->Length = cpu_to_le16((__u16)(buffer_size -
1405 sizeof(struct ti_i2c_image_header)));
1406 header->CheckSum = cs;
1407
1408 /* Download the operational code */
1409 dev_dbg(dev, "%s - Downloading operational code image (TI UMP)\n", __func__);
1410 status = download_code(serial, buffer, buffer_size);
1411
1412 kfree(buffer);
1413
1414 if (status) {
1415 dev_dbg(dev, "%s - Error downloading operational code image\n", __func__);
1416 return status;
1417 }
1418
1419 /* Device will reboot */
1420 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1421
1422 dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__);
1423
1424 /* return an error on purpose */
1425 return -ENODEV;
1426 }
1427
1428 stayinbootmode:
1429 /* Eprom is invalid or blank stay in boot mode */
1430 dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__);
1431 serial->product_info.TiMode = TI_MODE_BOOT;
1432
1433 return 0;
1434 }
1435
1436
1437 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1438 {
1439 int port_number = port->port->number - port->port->serial->minor;
1440 on = !!on; /* 1 or 0 not bitmask */
1441 return send_cmd(port->port->serial->dev,
1442 feature, (__u8)(UMPM_UART1_PORT + port_number),
1443 on, NULL, 0);
1444 }
1445
1446
1447 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1448 {
1449 int status = 0;
1450
1451 dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr);
1452
1453 status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1454 if (status)
1455 return status;
1456 status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1457 if (status)
1458 return status;
1459 return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1460 }
1461
1462 /* Convert TI LSR to standard UART flags */
1463 static __u8 map_line_status(__u8 ti_lsr)
1464 {
1465 __u8 lsr = 0;
1466
1467 #define MAP_FLAG(flagUmp, flagUart) \
1468 if (ti_lsr & flagUmp) \
1469 lsr |= flagUart;
1470
1471 MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */
1472 MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */
1473 MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */
1474 MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */
1475 MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* rx data available */
1476 MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* tx hold reg empty */
1477
1478 #undef MAP_FLAG
1479
1480 return lsr;
1481 }
1482
1483 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1484 {
1485 struct async_icount *icount;
1486 struct tty_struct *tty;
1487
1488 dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr);
1489
1490 if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1491 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1492 icount = &edge_port->icount;
1493
1494 /* update input line counters */
1495 if (msr & EDGEPORT_MSR_DELTA_CTS)
1496 icount->cts++;
1497 if (msr & EDGEPORT_MSR_DELTA_DSR)
1498 icount->dsr++;
1499 if (msr & EDGEPORT_MSR_DELTA_CD)
1500 icount->dcd++;
1501 if (msr & EDGEPORT_MSR_DELTA_RI)
1502 icount->rng++;
1503 wake_up_interruptible(&edge_port->delta_msr_wait);
1504 }
1505
1506 /* Save the new modem status */
1507 edge_port->shadow_msr = msr & 0xf0;
1508
1509 tty = tty_port_tty_get(&edge_port->port->port);
1510 /* handle CTS flow control */
1511 if (tty && C_CRTSCTS(tty)) {
1512 if (msr & EDGEPORT_MSR_CTS) {
1513 tty->hw_stopped = 0;
1514 tty_wakeup(tty);
1515 } else {
1516 tty->hw_stopped = 1;
1517 }
1518 }
1519 tty_kref_put(tty);
1520 }
1521
1522 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1523 __u8 lsr, __u8 data)
1524 {
1525 struct async_icount *icount;
1526 __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1527 LSR_FRM_ERR | LSR_BREAK));
1528 struct tty_struct *tty;
1529
1530 dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr);
1531
1532 edge_port->shadow_lsr = lsr;
1533
1534 if (new_lsr & LSR_BREAK)
1535 /*
1536 * Parity and Framing errors only count if they
1537 * occur exclusive of a break being received.
1538 */
1539 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1540
1541 /* Place LSR data byte into Rx buffer */
1542 if (lsr_data) {
1543 tty = tty_port_tty_get(&edge_port->port->port);
1544 if (tty) {
1545 edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
1546 tty_kref_put(tty);
1547 }
1548 }
1549
1550 /* update input line counters */
1551 icount = &edge_port->icount;
1552 if (new_lsr & LSR_BREAK)
1553 icount->brk++;
1554 if (new_lsr & LSR_OVER_ERR)
1555 icount->overrun++;
1556 if (new_lsr & LSR_PAR_ERR)
1557 icount->parity++;
1558 if (new_lsr & LSR_FRM_ERR)
1559 icount->frame++;
1560 }
1561
1562
1563 static void edge_interrupt_callback(struct urb *urb)
1564 {
1565 struct edgeport_serial *edge_serial = urb->context;
1566 struct usb_serial_port *port;
1567 struct edgeport_port *edge_port;
1568 struct device *dev;
1569 unsigned char *data = urb->transfer_buffer;
1570 int length = urb->actual_length;
1571 int port_number;
1572 int function;
1573 int retval;
1574 __u8 lsr;
1575 __u8 msr;
1576 int status = urb->status;
1577
1578 switch (status) {
1579 case 0:
1580 /* success */
1581 break;
1582 case -ECONNRESET:
1583 case -ENOENT:
1584 case -ESHUTDOWN:
1585 /* this urb is terminated, clean up */
1586 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1587 __func__, status);
1588 return;
1589 default:
1590 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1591 "%d\n", __func__, status);
1592 goto exit;
1593 }
1594
1595 if (!length) {
1596 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__);
1597 goto exit;
1598 }
1599
1600 dev = &edge_serial->serial->dev->dev;
1601 usb_serial_debug_data(dev, __func__, length, data);
1602
1603 if (length != 2) {
1604 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length);
1605 goto exit;
1606 }
1607
1608 port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1609 function = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1610 dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
1611 port_number, function, data[1]);
1612 port = edge_serial->serial->port[port_number];
1613 edge_port = usb_get_serial_port_data(port);
1614 if (!edge_port) {
1615 dev_dbg(dev, "%s - edge_port not found\n", __func__);
1616 return;
1617 }
1618 switch (function) {
1619 case TIUMP_INTERRUPT_CODE_LSR:
1620 lsr = map_line_status(data[1]);
1621 if (lsr & UMP_UART_LSR_DATA_MASK) {
1622 /* Save the LSR event for bulk read
1623 completion routine */
1624 dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n",
1625 __func__, port_number, lsr);
1626 edge_port->lsr_event = 1;
1627 edge_port->lsr_mask = lsr;
1628 } else {
1629 dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n",
1630 __func__, port_number, lsr);
1631 handle_new_lsr(edge_port, 0, lsr, 0);
1632 }
1633 break;
1634
1635 case TIUMP_INTERRUPT_CODE_MSR: /* MSR */
1636 /* Copy MSR from UMP */
1637 msr = data[1];
1638 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n",
1639 __func__, port_number, msr);
1640 handle_new_msr(edge_port, msr);
1641 break;
1642
1643 default:
1644 dev_err(&urb->dev->dev,
1645 "%s - Unknown Interrupt code from UMP %x\n",
1646 __func__, data[1]);
1647 break;
1648
1649 }
1650
1651 exit:
1652 retval = usb_submit_urb(urb, GFP_ATOMIC);
1653 if (retval)
1654 dev_err(&urb->dev->dev,
1655 "%s - usb_submit_urb failed with result %d\n",
1656 __func__, retval);
1657 }
1658
1659 static void edge_bulk_in_callback(struct urb *urb)
1660 {
1661 struct edgeport_port *edge_port = urb->context;
1662 struct device *dev = &edge_port->port->dev;
1663 unsigned char *data = urb->transfer_buffer;
1664 struct tty_struct *tty;
1665 int retval = 0;
1666 int port_number;
1667 int status = urb->status;
1668
1669 switch (status) {
1670 case 0:
1671 /* success */
1672 break;
1673 case -ECONNRESET:
1674 case -ENOENT:
1675 case -ESHUTDOWN:
1676 /* this urb is terminated, clean up */
1677 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
1678 return;
1679 default:
1680 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status);
1681 }
1682
1683 if (status == -EPIPE)
1684 goto exit;
1685
1686 if (status) {
1687 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1688 return;
1689 }
1690
1691 port_number = edge_port->port->number - edge_port->port->serial->minor;
1692
1693 if (edge_port->lsr_event) {
1694 edge_port->lsr_event = 0;
1695 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n",
1696 __func__, port_number, edge_port->lsr_mask, *data);
1697 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1698 /* Adjust buffer length/pointer */
1699 --urb->actual_length;
1700 ++data;
1701 }
1702
1703 tty = tty_port_tty_get(&edge_port->port->port);
1704 if (tty && urb->actual_length) {
1705 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
1706 if (edge_port->close_pending)
1707 dev_dbg(dev, "%s - close pending, dropping data on the floor\n",
1708 __func__);
1709 else
1710 edge_tty_recv(dev, tty, data, urb->actual_length);
1711 edge_port->icount.rx += urb->actual_length;
1712 }
1713 tty_kref_put(tty);
1714
1715 exit:
1716 /* continue read unless stopped */
1717 spin_lock(&edge_port->ep_lock);
1718 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1719 retval = usb_submit_urb(urb, GFP_ATOMIC);
1720 else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1721 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1722
1723 spin_unlock(&edge_port->ep_lock);
1724 if (retval)
1725 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);
1726 }
1727
1728 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
1729 unsigned char *data, int length)
1730 {
1731 int queued;
1732
1733 queued = tty_insert_flip_string(tty, data, length);
1734 if (queued < length)
1735 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1736 __func__, length - queued);
1737 tty_flip_buffer_push(tty);
1738 }
1739
1740 static void edge_bulk_out_callback(struct urb *urb)
1741 {
1742 struct usb_serial_port *port = urb->context;
1743 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1744 int status = urb->status;
1745 struct tty_struct *tty;
1746
1747 edge_port->ep_write_urb_in_use = 0;
1748
1749 switch (status) {
1750 case 0:
1751 /* success */
1752 break;
1753 case -ECONNRESET:
1754 case -ENOENT:
1755 case -ESHUTDOWN:
1756 /* this urb is terminated, clean up */
1757 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1758 __func__, status);
1759 return;
1760 default:
1761 dev_err_console(port, "%s - nonzero write bulk status "
1762 "received: %d\n", __func__, status);
1763 }
1764
1765 /* send any buffered data */
1766 tty = tty_port_tty_get(&port->port);
1767 edge_send(tty);
1768 tty_kref_put(tty);
1769 }
1770
1771 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1772 {
1773 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1774 struct edgeport_serial *edge_serial;
1775 struct usb_device *dev;
1776 struct urb *urb;
1777 int port_number;
1778 int status;
1779 u16 open_settings;
1780 u8 transaction_timeout;
1781
1782 if (edge_port == NULL)
1783 return -ENODEV;
1784
1785 port_number = port->number - port->serial->minor;
1786 switch (port_number) {
1787 case 0:
1788 edge_port->uart_base = UMPMEM_BASE_UART1;
1789 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
1790 break;
1791 case 1:
1792 edge_port->uart_base = UMPMEM_BASE_UART2;
1793 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
1794 break;
1795 default:
1796 dev_err(&port->dev, "Unknown port number!!!\n");
1797 return -ENODEV;
1798 }
1799
1800 dev_dbg(&port->dev, "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n",
1801 __func__, port_number, edge_port->uart_base, edge_port->dma_address);
1802
1803 dev = port->serial->dev;
1804
1805 memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1806 init_waitqueue_head(&edge_port->delta_msr_wait);
1807
1808 /* turn off loopback */
1809 status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1810 if (status) {
1811 dev_err(&port->dev,
1812 "%s - cannot send clear loopback command, %d\n",
1813 __func__, status);
1814 return status;
1815 }
1816
1817 /* set up the port settings */
1818 if (tty)
1819 edge_set_termios(tty, port, &tty->termios);
1820
1821 /* open up the port */
1822
1823 /* milliseconds to timeout for DMA transfer */
1824 transaction_timeout = 2;
1825
1826 edge_port->ump_read_timeout =
1827 max(20, ((transaction_timeout * 3) / 2));
1828
1829 /* milliseconds to timeout for DMA transfer */
1830 open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1831 UMP_PIPE_TRANS_TIMEOUT_ENA |
1832 (transaction_timeout << 2));
1833
1834 dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__);
1835
1836 /* Tell TI to open and start the port */
1837 status = send_cmd(dev, UMPC_OPEN_PORT,
1838 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1839 if (status) {
1840 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1841 __func__, status);
1842 return status;
1843 }
1844
1845 /* Start the DMA? */
1846 status = send_cmd(dev, UMPC_START_PORT,
1847 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1848 if (status) {
1849 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1850 __func__, status);
1851 return status;
1852 }
1853
1854 /* Clear TX and RX buffers in UMP */
1855 status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1856 if (status) {
1857 dev_err(&port->dev,
1858 "%s - cannot send clear buffers command, %d\n",
1859 __func__, status);
1860 return status;
1861 }
1862
1863 /* Read Initial MSR */
1864 status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1865 (__u16)(UMPM_UART1_PORT + port_number),
1866 &edge_port->shadow_msr, 1);
1867 if (status) {
1868 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1869 __func__, status);
1870 return status;
1871 }
1872
1873 dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr);
1874
1875 /* Set Initial MCR */
1876 edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1877 dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr);
1878
1879 edge_serial = edge_port->edge_serial;
1880 if (mutex_lock_interruptible(&edge_serial->es_lock))
1881 return -ERESTARTSYS;
1882 if (edge_serial->num_ports_open == 0) {
1883 /* we are the first port to open, post the interrupt urb */
1884 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1885 if (!urb) {
1886 dev_err(&port->dev,
1887 "%s - no interrupt urb present, exiting\n",
1888 __func__);
1889 status = -EINVAL;
1890 goto release_es_lock;
1891 }
1892 urb->context = edge_serial;
1893 status = usb_submit_urb(urb, GFP_KERNEL);
1894 if (status) {
1895 dev_err(&port->dev,
1896 "%s - usb_submit_urb failed with value %d\n",
1897 __func__, status);
1898 goto release_es_lock;
1899 }
1900 }
1901
1902 /*
1903 * reset the data toggle on the bulk endpoints to work around bug in
1904 * host controllers where things get out of sync some times
1905 */
1906 usb_clear_halt(dev, port->write_urb->pipe);
1907 usb_clear_halt(dev, port->read_urb->pipe);
1908
1909 /* start up our bulk read urb */
1910 urb = port->read_urb;
1911 if (!urb) {
1912 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1913 __func__);
1914 status = -EINVAL;
1915 goto unlink_int_urb;
1916 }
1917 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1918 urb->context = edge_port;
1919 status = usb_submit_urb(urb, GFP_KERNEL);
1920 if (status) {
1921 dev_err(&port->dev,
1922 "%s - read bulk usb_submit_urb failed with value %d\n",
1923 __func__, status);
1924 goto unlink_int_urb;
1925 }
1926
1927 ++edge_serial->num_ports_open;
1928
1929 port->port.drain_delay = 1;
1930
1931 goto release_es_lock;
1932
1933 unlink_int_urb:
1934 if (edge_port->edge_serial->num_ports_open == 0)
1935 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1936 release_es_lock:
1937 mutex_unlock(&edge_serial->es_lock);
1938 return status;
1939 }
1940
1941 static void edge_close(struct usb_serial_port *port)
1942 {
1943 struct edgeport_serial *edge_serial;
1944 struct edgeport_port *edge_port;
1945 struct usb_serial *serial = port->serial;
1946 unsigned long flags;
1947 int port_number;
1948
1949 edge_serial = usb_get_serial_data(port->serial);
1950 edge_port = usb_get_serial_port_data(port);
1951 if (edge_serial == NULL || edge_port == NULL)
1952 return;
1953
1954 /* The bulkreadcompletion routine will check
1955 * this flag and dump add read data */
1956 edge_port->close_pending = 1;
1957
1958 chase_port(edge_port, (HZ * closing_wait) / 100);
1959
1960 usb_kill_urb(port->read_urb);
1961 usb_kill_urb(port->write_urb);
1962 edge_port->ep_write_urb_in_use = 0;
1963 spin_lock_irqsave(&edge_port->ep_lock, flags);
1964 kfifo_reset_out(&edge_port->write_fifo);
1965 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1966
1967 /* assuming we can still talk to the device,
1968 * send a close port command to it */
1969 dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
1970 port_number = port->number - port->serial->minor;
1971
1972 mutex_lock(&serial->disc_mutex);
1973 if (!serial->disconnected) {
1974 send_cmd(serial->dev,
1975 UMPC_CLOSE_PORT,
1976 (__u8)(UMPM_UART1_PORT + port_number),
1977 0,
1978 NULL,
1979 0);
1980 }
1981 mutex_unlock(&serial->disc_mutex);
1982
1983 mutex_lock(&edge_serial->es_lock);
1984 --edge_port->edge_serial->num_ports_open;
1985 if (edge_port->edge_serial->num_ports_open <= 0) {
1986 /* last port is now closed, let's shut down our interrupt urb */
1987 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1988 edge_port->edge_serial->num_ports_open = 0;
1989 }
1990 mutex_unlock(&edge_serial->es_lock);
1991 edge_port->close_pending = 0;
1992 }
1993
1994 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1995 const unsigned char *data, int count)
1996 {
1997 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1998
1999 if (count == 0) {
2000 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
2001 return 0;
2002 }
2003
2004 if (edge_port == NULL)
2005 return -ENODEV;
2006 if (edge_port->close_pending == 1)
2007 return -ENODEV;
2008
2009 count = kfifo_in_locked(&edge_port->write_fifo, data, count,
2010 &edge_port->ep_lock);
2011 edge_send(tty);
2012
2013 return count;
2014 }
2015
2016 static void edge_send(struct tty_struct *tty)
2017 {
2018 struct usb_serial_port *port = tty->driver_data;
2019 int count, result;
2020 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2021 unsigned long flags;
2022
2023 spin_lock_irqsave(&edge_port->ep_lock, flags);
2024
2025 if (edge_port->ep_write_urb_in_use) {
2026 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2027 return;
2028 }
2029
2030 count = kfifo_out(&edge_port->write_fifo,
2031 port->write_urb->transfer_buffer,
2032 port->bulk_out_size);
2033
2034 if (count == 0) {
2035 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2036 return;
2037 }
2038
2039 edge_port->ep_write_urb_in_use = 1;
2040
2041 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2042
2043 usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer);
2044
2045 /* set up our urb */
2046 port->write_urb->transfer_buffer_length = count;
2047
2048 /* send the data out the bulk port */
2049 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2050 if (result) {
2051 dev_err_console(port,
2052 "%s - failed submitting write urb, error %d\n",
2053 __func__, result);
2054 edge_port->ep_write_urb_in_use = 0;
2055 /* TODO: reschedule edge_send */
2056 } else
2057 edge_port->icount.tx += count;
2058
2059 /* wakeup any process waiting for writes to complete */
2060 /* there is now more room in the buffer for new writes */
2061 if (tty)
2062 tty_wakeup(tty);
2063 }
2064
2065 static int edge_write_room(struct tty_struct *tty)
2066 {
2067 struct usb_serial_port *port = tty->driver_data;
2068 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2069 int room = 0;
2070 unsigned long flags;
2071
2072 if (edge_port == NULL)
2073 return 0;
2074 if (edge_port->close_pending == 1)
2075 return 0;
2076
2077 spin_lock_irqsave(&edge_port->ep_lock, flags);
2078 room = kfifo_avail(&edge_port->write_fifo);
2079 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2080
2081 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
2082 return room;
2083 }
2084
2085 static int edge_chars_in_buffer(struct tty_struct *tty)
2086 {
2087 struct usb_serial_port *port = tty->driver_data;
2088 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2089 int chars = 0;
2090 unsigned long flags;
2091 int ret;
2092
2093 if (edge_port == NULL)
2094 return 0;
2095 if (edge_port->close_pending == 1)
2096 return 0;
2097
2098 spin_lock_irqsave(&edge_port->ep_lock, flags);
2099 chars = kfifo_len(&edge_port->write_fifo);
2100 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2101
2102 if (!chars) {
2103 ret = tx_active(edge_port);
2104 if (ret > 0)
2105 chars = ret;
2106 }
2107
2108 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
2109 return chars;
2110 }
2111
2112 static void edge_throttle(struct tty_struct *tty)
2113 {
2114 struct usb_serial_port *port = tty->driver_data;
2115 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2116 int status;
2117
2118 if (edge_port == NULL)
2119 return;
2120
2121 /* if we are implementing XON/XOFF, send the stop character */
2122 if (I_IXOFF(tty)) {
2123 unsigned char stop_char = STOP_CHAR(tty);
2124 status = edge_write(tty, port, &stop_char, 1);
2125 if (status <= 0) {
2126 dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2127 }
2128 }
2129
2130 /* if we are implementing RTS/CTS, stop reads */
2131 /* and the Edgeport will clear the RTS line */
2132 if (C_CRTSCTS(tty))
2133 stop_read(edge_port);
2134
2135 }
2136
2137 static void edge_unthrottle(struct tty_struct *tty)
2138 {
2139 struct usb_serial_port *port = tty->driver_data;
2140 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2141 int status;
2142
2143 if (edge_port == NULL)
2144 return;
2145
2146 /* if we are implementing XON/XOFF, send the start character */
2147 if (I_IXOFF(tty)) {
2148 unsigned char start_char = START_CHAR(tty);
2149 status = edge_write(tty, port, &start_char, 1);
2150 if (status <= 0) {
2151 dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2152 }
2153 }
2154 /* if we are implementing RTS/CTS, restart reads */
2155 /* are the Edgeport will assert the RTS line */
2156 if (C_CRTSCTS(tty)) {
2157 status = restart_read(edge_port);
2158 if (status)
2159 dev_err(&port->dev,
2160 "%s - read bulk usb_submit_urb failed: %d\n",
2161 __func__, status);
2162 }
2163
2164 }
2165
2166 static void stop_read(struct edgeport_port *edge_port)
2167 {
2168 unsigned long flags;
2169
2170 spin_lock_irqsave(&edge_port->ep_lock, flags);
2171
2172 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2173 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2174 edge_port->shadow_mcr &= ~MCR_RTS;
2175
2176 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2177 }
2178
2179 static int restart_read(struct edgeport_port *edge_port)
2180 {
2181 struct urb *urb;
2182 int status = 0;
2183 unsigned long flags;
2184
2185 spin_lock_irqsave(&edge_port->ep_lock, flags);
2186
2187 if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2188 urb = edge_port->port->read_urb;
2189 status = usb_submit_urb(urb, GFP_ATOMIC);
2190 }
2191 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2192 edge_port->shadow_mcr |= MCR_RTS;
2193
2194 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2195
2196 return status;
2197 }
2198
2199 static void change_port_settings(struct tty_struct *tty,
2200 struct edgeport_port *edge_port, struct ktermios *old_termios)
2201 {
2202 struct device *dev = &edge_port->port->dev;
2203 struct ump_uart_config *config;
2204 int baud;
2205 unsigned cflag;
2206 int status;
2207 int port_number = edge_port->port->number -
2208 edge_port->port->serial->minor;
2209
2210 dev_dbg(dev, "%s - port %d\n", __func__, edge_port->port->number);
2211
2212 config = kmalloc (sizeof (*config), GFP_KERNEL);
2213 if (!config) {
2214 tty->termios = *old_termios;
2215 dev_err(dev, "%s - out of memory\n", __func__);
2216 return;
2217 }
2218
2219 cflag = tty->termios.c_cflag;
2220
2221 config->wFlags = 0;
2222
2223 /* These flags must be set */
2224 config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2225 config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2226 config->bUartMode = (__u8)(edge_port->bUartMode);
2227
2228 switch (cflag & CSIZE) {
2229 case CS5:
2230 config->bDataBits = UMP_UART_CHAR5BITS;
2231 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2232 break;
2233 case CS6:
2234 config->bDataBits = UMP_UART_CHAR6BITS;
2235 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2236 break;
2237 case CS7:
2238 config->bDataBits = UMP_UART_CHAR7BITS;
2239 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2240 break;
2241 default:
2242 case CS8:
2243 config->bDataBits = UMP_UART_CHAR8BITS;
2244 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2245 break;
2246 }
2247
2248 if (cflag & PARENB) {
2249 if (cflag & PARODD) {
2250 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2251 config->bParity = UMP_UART_ODDPARITY;
2252 dev_dbg(dev, "%s - parity = odd\n", __func__);
2253 } else {
2254 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2255 config->bParity = UMP_UART_EVENPARITY;
2256 dev_dbg(dev, "%s - parity = even\n", __func__);
2257 }
2258 } else {
2259 config->bParity = UMP_UART_NOPARITY;
2260 dev_dbg(dev, "%s - parity = none\n", __func__);
2261 }
2262
2263 if (cflag & CSTOPB) {
2264 config->bStopBits = UMP_UART_STOPBIT2;
2265 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2266 } else {
2267 config->bStopBits = UMP_UART_STOPBIT1;
2268 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2269 }
2270
2271 /* figure out the flow control settings */
2272 if (cflag & CRTSCTS) {
2273 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2274 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2275 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2276 } else {
2277 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2278 tty->hw_stopped = 0;
2279 restart_read(edge_port);
2280 }
2281
2282 /* if we are implementing XON/XOFF, set the start and stop
2283 character in the device */
2284 config->cXon = START_CHAR(tty);
2285 config->cXoff = STOP_CHAR(tty);
2286
2287 /* if we are implementing INBOUND XON/XOFF */
2288 if (I_IXOFF(tty)) {
2289 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2290 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2291 __func__, config->cXon, config->cXoff);
2292 } else
2293 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2294
2295 /* if we are implementing OUTBOUND XON/XOFF */
2296 if (I_IXON(tty)) {
2297 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2298 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2299 __func__, config->cXon, config->cXoff);
2300 } else
2301 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2302
2303 tty->termios.c_cflag &= ~CMSPAR;
2304
2305 /* Round the baud rate */
2306 baud = tty_get_baud_rate(tty);
2307 if (!baud) {
2308 /* pick a default, any default... */
2309 baud = 9600;
2310 } else
2311 tty_encode_baud_rate(tty, baud, baud);
2312
2313 edge_port->baud_rate = baud;
2314 config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2315
2316 /* FIXME: Recompute actual baud from divisor here */
2317
2318 dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate);
2319
2320 dev_dbg(dev, "wBaudRate: %d\n", (int)(461550L / config->wBaudRate));
2321 dev_dbg(dev, "wFlags: 0x%x\n", config->wFlags);
2322 dev_dbg(dev, "bDataBits: %d\n", config->bDataBits);
2323 dev_dbg(dev, "bParity: %d\n", config->bParity);
2324 dev_dbg(dev, "bStopBits: %d\n", config->bStopBits);
2325 dev_dbg(dev, "cXon: %d\n", config->cXon);
2326 dev_dbg(dev, "cXoff: %d\n", config->cXoff);
2327 dev_dbg(dev, "bUartMode: %d\n", config->bUartMode);
2328
2329 /* move the word values into big endian mode */
2330 cpu_to_be16s(&config->wFlags);
2331 cpu_to_be16s(&config->wBaudRate);
2332
2333 status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2334 (__u8)(UMPM_UART1_PORT + port_number),
2335 0, (__u8 *)config, sizeof(*config));
2336 if (status)
2337 dev_dbg(dev, "%s - error %d when trying to write config to device\n",
2338 __func__, status);
2339 kfree(config);
2340 }
2341
2342 static void edge_set_termios(struct tty_struct *tty,
2343 struct usb_serial_port *port, struct ktermios *old_termios)
2344 {
2345 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2346 unsigned int cflag;
2347
2348 cflag = tty->termios.c_cflag;
2349
2350 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2351 tty->termios.c_cflag, tty->termios.c_iflag);
2352 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2353 old_termios->c_cflag, old_termios->c_iflag);
2354 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
2355
2356 if (edge_port == NULL)
2357 return;
2358 /* change the port settings to the new ones specified */
2359 change_port_settings(tty, edge_port, old_termios);
2360 }
2361
2362 static int edge_tiocmset(struct tty_struct *tty,
2363 unsigned int set, unsigned int clear)
2364 {
2365 struct usb_serial_port *port = tty->driver_data;
2366 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2367 unsigned int mcr;
2368 unsigned long flags;
2369
2370 spin_lock_irqsave(&edge_port->ep_lock, flags);
2371 mcr = edge_port->shadow_mcr;
2372 if (set & TIOCM_RTS)
2373 mcr |= MCR_RTS;
2374 if (set & TIOCM_DTR)
2375 mcr |= MCR_DTR;
2376 if (set & TIOCM_LOOP)
2377 mcr |= MCR_LOOPBACK;
2378
2379 if (clear & TIOCM_RTS)
2380 mcr &= ~MCR_RTS;
2381 if (clear & TIOCM_DTR)
2382 mcr &= ~MCR_DTR;
2383 if (clear & TIOCM_LOOP)
2384 mcr &= ~MCR_LOOPBACK;
2385
2386 edge_port->shadow_mcr = mcr;
2387 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2388
2389 restore_mcr(edge_port, mcr);
2390 return 0;
2391 }
2392
2393 static int edge_tiocmget(struct tty_struct *tty)
2394 {
2395 struct usb_serial_port *port = tty->driver_data;
2396 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2397 unsigned int result = 0;
2398 unsigned int msr;
2399 unsigned int mcr;
2400 unsigned long flags;
2401
2402 spin_lock_irqsave(&edge_port->ep_lock, flags);
2403
2404 msr = edge_port->shadow_msr;
2405 mcr = edge_port->shadow_mcr;
2406 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
2407 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
2408 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
2409 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
2410 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
2411 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
2412
2413
2414 dev_dbg(&port->dev, "%s -- %x\n", __func__, result);
2415 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2416
2417 return result;
2418 }
2419
2420 static int edge_get_icount(struct tty_struct *tty,
2421 struct serial_icounter_struct *icount)
2422 {
2423 struct usb_serial_port *port = tty->driver_data;
2424 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2425 struct async_icount *ic = &edge_port->icount;
2426
2427 icount->cts = ic->cts;
2428 icount->dsr = ic->dsr;
2429 icount->rng = ic->rng;
2430 icount->dcd = ic->dcd;
2431 icount->tx = ic->tx;
2432 icount->rx = ic->rx;
2433 icount->frame = ic->frame;
2434 icount->parity = ic->parity;
2435 icount->overrun = ic->overrun;
2436 icount->brk = ic->brk;
2437 icount->buf_overrun = ic->buf_overrun;
2438 return 0;
2439 }
2440
2441 static int get_serial_info(struct edgeport_port *edge_port,
2442 struct serial_struct __user *retinfo)
2443 {
2444 struct serial_struct tmp;
2445
2446 if (!retinfo)
2447 return -EFAULT;
2448
2449 memset(&tmp, 0, sizeof(tmp));
2450
2451 tmp.type = PORT_16550A;
2452 tmp.line = edge_port->port->serial->minor;
2453 tmp.port = edge_port->port->number;
2454 tmp.irq = 0;
2455 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2456 tmp.xmit_fifo_size = edge_port->port->bulk_out_size;
2457 tmp.baud_base = 9600;
2458 tmp.close_delay = 5*HZ;
2459 tmp.closing_wait = closing_wait;
2460
2461 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2462 return -EFAULT;
2463 return 0;
2464 }
2465
2466 static int edge_ioctl(struct tty_struct *tty,
2467 unsigned int cmd, unsigned long arg)
2468 {
2469 struct usb_serial_port *port = tty->driver_data;
2470 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2471 struct async_icount cnow;
2472 struct async_icount cprev;
2473
2474 dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd);
2475
2476 switch (cmd) {
2477 case TIOCGSERIAL:
2478 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
2479 return get_serial_info(edge_port,
2480 (struct serial_struct __user *) arg);
2481 case TIOCMIWAIT:
2482 dev_dbg(&port->dev, "%s - TIOCMIWAIT\n", __func__);
2483 cprev = edge_port->icount;
2484 while (1) {
2485 interruptible_sleep_on(&edge_port->delta_msr_wait);
2486 /* see if a signal did it */
2487 if (signal_pending(current))
2488 return -ERESTARTSYS;
2489 cnow = edge_port->icount;
2490 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2491 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2492 return -EIO; /* no change => error */
2493 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2494 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2495 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2496 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2497 return 0;
2498 }
2499 cprev = cnow;
2500 }
2501 /* not reached */
2502 break;
2503 }
2504 return -ENOIOCTLCMD;
2505 }
2506
2507 static void edge_break(struct tty_struct *tty, int break_state)
2508 {
2509 struct usb_serial_port *port = tty->driver_data;
2510 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2511 int status;
2512 int bv = 0; /* Off */
2513
2514 /* chase the port close */
2515 chase_port(edge_port, 0);
2516
2517 if (break_state == -1)
2518 bv = 1; /* On */
2519 status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2520 if (status)
2521 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n",
2522 __func__, status);
2523 }
2524
2525 static int edge_startup(struct usb_serial *serial)
2526 {
2527 struct edgeport_serial *edge_serial;
2528 int status;
2529
2530 /* create our private serial structure */
2531 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2532 if (edge_serial == NULL) {
2533 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2534 return -ENOMEM;
2535 }
2536 mutex_init(&edge_serial->es_lock);
2537 edge_serial->serial = serial;
2538 usb_set_serial_data(serial, edge_serial);
2539
2540 status = download_fw(edge_serial);
2541 if (status) {
2542 kfree(edge_serial);
2543 return status;
2544 }
2545
2546 return 0;
2547 }
2548
2549 static void edge_disconnect(struct usb_serial *serial)
2550 {
2551 }
2552
2553 static void edge_release(struct usb_serial *serial)
2554 {
2555 kfree(usb_get_serial_data(serial));
2556 }
2557
2558 static int edge_port_probe(struct usb_serial_port *port)
2559 {
2560 struct edgeport_port *edge_port;
2561 int ret;
2562
2563 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2564 if (!edge_port)
2565 return -ENOMEM;
2566
2567 ret = kfifo_alloc(&edge_port->write_fifo, EDGE_OUT_BUF_SIZE,
2568 GFP_KERNEL);
2569 if (ret) {
2570 kfree(edge_port);
2571 return -ENOMEM;
2572 }
2573
2574 spin_lock_init(&edge_port->ep_lock);
2575 edge_port->port = port;
2576 edge_port->edge_serial = usb_get_serial_data(port->serial);
2577 edge_port->bUartMode = default_uart_mode;
2578
2579 usb_set_serial_port_data(port, edge_port);
2580
2581 ret = edge_create_sysfs_attrs(port);
2582 if (ret) {
2583 kfifo_free(&edge_port->write_fifo);
2584 kfree(edge_port);
2585 return ret;
2586 }
2587
2588 return 0;
2589 }
2590
2591 static int edge_port_remove(struct usb_serial_port *port)
2592 {
2593 struct edgeport_port *edge_port;
2594
2595 edge_port = usb_get_serial_port_data(port);
2596
2597 edge_remove_sysfs_attrs(port);
2598 kfifo_free(&edge_port->write_fifo);
2599 kfree(edge_port);
2600
2601 return 0;
2602 }
2603
2604 /* Sysfs Attributes */
2605
2606 static ssize_t show_uart_mode(struct device *dev,
2607 struct device_attribute *attr, char *buf)
2608 {
2609 struct usb_serial_port *port = to_usb_serial_port(dev);
2610 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2611
2612 return sprintf(buf, "%d\n", edge_port->bUartMode);
2613 }
2614
2615 static ssize_t store_uart_mode(struct device *dev,
2616 struct device_attribute *attr, const char *valbuf, size_t count)
2617 {
2618 struct usb_serial_port *port = to_usb_serial_port(dev);
2619 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2620 unsigned int v = simple_strtoul(valbuf, NULL, 0);
2621
2622 dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v);
2623
2624 if (v < 256)
2625 edge_port->bUartMode = v;
2626 else
2627 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2628
2629 return count;
2630 }
2631
2632 static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode,
2633 store_uart_mode);
2634
2635 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2636 {
2637 return device_create_file(&port->dev, &dev_attr_uart_mode);
2638 }
2639
2640 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2641 {
2642 device_remove_file(&port->dev, &dev_attr_uart_mode);
2643 return 0;
2644 }
2645
2646
2647 static struct usb_serial_driver edgeport_1port_device = {
2648 .driver = {
2649 .owner = THIS_MODULE,
2650 .name = "edgeport_ti_1",
2651 },
2652 .description = "Edgeport TI 1 port adapter",
2653 .id_table = edgeport_1port_id_table,
2654 .num_ports = 1,
2655 .open = edge_open,
2656 .close = edge_close,
2657 .throttle = edge_throttle,
2658 .unthrottle = edge_unthrottle,
2659 .attach = edge_startup,
2660 .disconnect = edge_disconnect,
2661 .release = edge_release,
2662 .port_probe = edge_port_probe,
2663 .port_remove = edge_port_remove,
2664 .ioctl = edge_ioctl,
2665 .set_termios = edge_set_termios,
2666 .tiocmget = edge_tiocmget,
2667 .tiocmset = edge_tiocmset,
2668 .get_icount = edge_get_icount,
2669 .write = edge_write,
2670 .write_room = edge_write_room,
2671 .chars_in_buffer = edge_chars_in_buffer,
2672 .break_ctl = edge_break,
2673 .read_int_callback = edge_interrupt_callback,
2674 .read_bulk_callback = edge_bulk_in_callback,
2675 .write_bulk_callback = edge_bulk_out_callback,
2676 };
2677
2678 static struct usb_serial_driver edgeport_2port_device = {
2679 .driver = {
2680 .owner = THIS_MODULE,
2681 .name = "edgeport_ti_2",
2682 },
2683 .description = "Edgeport TI 2 port adapter",
2684 .id_table = edgeport_2port_id_table,
2685 .num_ports = 2,
2686 .open = edge_open,
2687 .close = edge_close,
2688 .throttle = edge_throttle,
2689 .unthrottle = edge_unthrottle,
2690 .attach = edge_startup,
2691 .disconnect = edge_disconnect,
2692 .release = edge_release,
2693 .port_probe = edge_port_probe,
2694 .port_remove = edge_port_remove,
2695 .ioctl = edge_ioctl,
2696 .set_termios = edge_set_termios,
2697 .tiocmget = edge_tiocmget,
2698 .tiocmset = edge_tiocmset,
2699 .write = edge_write,
2700 .write_room = edge_write_room,
2701 .chars_in_buffer = edge_chars_in_buffer,
2702 .break_ctl = edge_break,
2703 .read_int_callback = edge_interrupt_callback,
2704 .read_bulk_callback = edge_bulk_in_callback,
2705 .write_bulk_callback = edge_bulk_out_callback,
2706 };
2707
2708 static struct usb_serial_driver * const serial_drivers[] = {
2709 &edgeport_1port_device, &edgeport_2port_device, NULL
2710 };
2711
2712 module_usb_serial_driver(serial_drivers, id_table_combined);
2713
2714 MODULE_AUTHOR(DRIVER_AUTHOR);
2715 MODULE_DESCRIPTION(DRIVER_DESC);
2716 MODULE_LICENSE("GPL");
2717 MODULE_FIRMWARE("edgeport/down3.bin");
2718
2719 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2720 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2721
2722 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2723 MODULE_PARM_DESC(ignore_cpu_rev,
2724 "Ignore the cpu revision when connecting to a device");
2725
2726 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
2727 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
Linus' kernel tree