]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/usb/serial/io_ti.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
USB: serial: io_ti: fix div-by-zero in set_termios
[mirror_ubuntu-artful-kernel.git] / drivers / usb / serial / io_ti.c
1 /*
2 * Edgeport USB Serial Converter driver
3 *
4 * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved.
5 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * Supports the following devices:
13 * EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
14 *
15 * For questions or problems with this driver, contact Inside Out
16 * Networks technical support, or Peter Berger <pberger@brimson.com>,
17 * or Al Borchers <alborchers@steinerpoint.com>.
18 */
19
20 #include <linux/kernel.h>
21 #include <linux/jiffies.h>
22 #include <linux/errno.h>
23 #include <linux/slab.h>
24 #include <linux/tty.h>
25 #include <linux/tty_driver.h>
26 #include <linux/tty_flip.h>
27 #include <linux/module.h>
28 #include <linux/spinlock.h>
29 #include <linux/mutex.h>
30 #include <linux/serial.h>
31 #include <linux/swab.h>
32 #include <linux/kfifo.h>
33 #include <linux/ioctl.h>
34 #include <linux/firmware.h>
35 #include <linux/uaccess.h>
36 #include <linux/usb.h>
37 #include <linux/usb/serial.h>
38
39 #include "io_16654.h"
40 #include "io_usbvend.h"
41 #include "io_ti.h"
42
43 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
44 #define DRIVER_DESC "Edgeport USB Serial Driver"
45
46 #define EPROM_PAGE_SIZE 64
47
48
49 /* different hardware types */
50 #define HARDWARE_TYPE_930 0
51 #define HARDWARE_TYPE_TIUMP 1
52
53 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
54 #define TI_MODE_CONFIGURING 0 /* Device has not entered start device */
55 #define TI_MODE_BOOT 1 /* Staying in boot mode */
56 #define TI_MODE_DOWNLOAD 2 /* Made it to download mode */
57 #define TI_MODE_TRANSITIONING 3 /*
58 * Currently in boot mode but
59 * transitioning to download mode
60 */
61
62 /* read urb state */
63 #define EDGE_READ_URB_RUNNING 0
64 #define EDGE_READ_URB_STOPPING 1
65 #define EDGE_READ_URB_STOPPED 2
66
67 #define EDGE_CLOSING_WAIT 4000 /* in .01 sec */
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 /*
77 * Edgeport firmware header
78 *
79 * "build_number" has been set to 0 in all three of the images I have
80 * seen, and Digi Tech Support suggests that it is safe to ignore it.
81 *
82 * "length" is the number of bytes of actual data following the header.
83 *
84 * "checksum" is the low order byte resulting from adding the values of
85 * all the data bytes.
86 */
87 struct edgeport_fw_hdr {
88 u8 major_version;
89 u8 minor_version;
90 __le16 build_number;
91 __le16 length;
92 u8 checksum;
93 } __packed;
94
95 struct edgeport_port {
96 __u16 uart_base;
97 __u16 dma_address;
98 __u8 shadow_msr;
99 __u8 shadow_mcr;
100 __u8 shadow_lsr;
101 __u8 lsr_mask;
102 __u32 ump_read_timeout; /*
103 * Number of milliseconds the UMP will
104 * wait without data before completing
105 * a read short
106 */
107 int baud_rate;
108 int close_pending;
109 int lsr_event;
110
111 struct edgeport_serial *edge_serial;
112 struct usb_serial_port *port;
113 __u8 bUartMode; /* Port type, 0: RS232, etc. */
114 spinlock_t ep_lock;
115 int ep_read_urb_state;
116 int ep_write_urb_in_use;
117 };
118
119 struct edgeport_serial {
120 struct product_info product_info;
121 u8 TI_I2C_Type; /* Type of I2C in UMP */
122 u8 TiReadI2C; /*
123 * Set to TRUE if we have read the
124 * I2c in Boot Mode
125 */
126 struct mutex es_lock;
127 int num_ports_open;
128 struct usb_serial *serial;
129 struct delayed_work heartbeat_work;
130 int fw_version;
131 bool use_heartbeat;
132 };
133
134
135 /* Devices that this driver supports */
136 static const struct usb_device_id edgeport_1port_id_table[] = {
137 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
138 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
139 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
140 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
141 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
142 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
143 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
144 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
145 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
146 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
147 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
148 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
149 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
150 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
151 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
152 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
153 { }
154 };
155
156 static const struct usb_device_id edgeport_2port_id_table[] = {
157 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
158 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
159 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
160 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
161 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
162 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
163 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
164 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
165 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
166 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
167 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
168 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
169 /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
170 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
171 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
172 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
173 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
174 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
175 { }
176 };
177
178 /* Devices that this driver supports */
179 static const struct usb_device_id id_table_combined[] = {
180 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
181 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
182 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
183 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
184 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
185 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
186 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
187 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
188 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
189 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
190 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
191 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
192 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
193 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
194 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
195 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
196 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
197 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
198 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
199 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
200 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
201 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
202 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
203 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
204 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
205 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
206 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
207 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
208 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
209 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
210 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
211 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
212 { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
213 { }
214 };
215
216 MODULE_DEVICE_TABLE(usb, id_table_combined);
217
218 static int closing_wait = EDGE_CLOSING_WAIT;
219 static bool ignore_cpu_rev;
220 static int default_uart_mode; /* RS232 */
221
222 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
223 int length);
224
225 static void stop_read(struct edgeport_port *edge_port);
226 static int restart_read(struct edgeport_port *edge_port);
227
228 static void edge_set_termios(struct tty_struct *tty,
229 struct usb_serial_port *port, struct ktermios *old_termios);
230 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty);
231
232 static int do_download_mode(struct edgeport_serial *serial,
233 const struct firmware *fw);
234 static int do_boot_mode(struct edgeport_serial *serial,
235 const struct firmware *fw);
236
237 /* sysfs attributes */
238 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
239 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
240
241 /*
242 * Some release of Edgeport firmware "down3.bin" after version 4.80
243 * introduced code to automatically disconnect idle devices on some
244 * Edgeport models after periods of inactivity, typically ~60 seconds.
245 * This occurs without regard to whether ports on the device are open
246 * or not. Digi International Tech Support suggested:
247 *
248 * 1. Adding driver "heartbeat" code to reset the firmware timer by
249 * requesting a descriptor record every 15 seconds, which should be
250 * effective with newer firmware versions that require it, and benign
251 * with older versions that do not. In practice 40 seconds seems often
252 * enough.
253 * 2. The heartbeat code is currently required only on Edgeport/416 models.
254 */
255 #define FW_HEARTBEAT_VERSION_CUTOFF ((4 << 8) + 80)
256 #define FW_HEARTBEAT_SECS 40
257
258 /* Timeouts in msecs: firmware downloads take longer */
259 #define TI_VSEND_TIMEOUT_DEFAULT 1000
260 #define TI_VSEND_TIMEOUT_FW_DOWNLOAD 10000
261
262 static int ti_vread_sync(struct usb_device *dev, __u8 request,
263 __u16 value, __u16 index, u8 *data, int size)
264 {
265 int status;
266
267 status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
268 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
269 value, index, data, size, 1000);
270 if (status < 0)
271 return status;
272 if (status != size) {
273 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
274 __func__, size, status);
275 return -ECOMM;
276 }
277 return 0;
278 }
279
280 static int ti_vsend_sync(struct usb_device *dev, u8 request, u16 value,
281 u16 index, u8 *data, int size, int timeout)
282 {
283 int status;
284
285 status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
286 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
287 value, index, data, size, timeout);
288 if (status < 0)
289 return status;
290 if (status != size) {
291 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
292 __func__, size, status);
293 return -ECOMM;
294 }
295 return 0;
296 }
297
298 static int send_cmd(struct usb_device *dev, __u8 command,
299 __u8 moduleid, __u16 value, u8 *data,
300 int size)
301 {
302 return ti_vsend_sync(dev, command, value, moduleid, data, size,
303 TI_VSEND_TIMEOUT_DEFAULT);
304 }
305
306 /* clear tx/rx buffers and fifo in TI UMP */
307 static int purge_port(struct usb_serial_port *port, __u16 mask)
308 {
309 int port_number = port->port_number;
310
311 dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask);
312
313 return send_cmd(port->serial->dev,
314 UMPC_PURGE_PORT,
315 (__u8)(UMPM_UART1_PORT + port_number),
316 mask,
317 NULL,
318 0);
319 }
320
321 /**
322 * read_download_mem - Read edgeport memory from TI chip
323 * @dev: usb device pointer
324 * @start_address: Device CPU address at which to read
325 * @length: Length of above data
326 * @address_type: Can read both XDATA and I2C
327 * @buffer: pointer to input data buffer
328 */
329 static int read_download_mem(struct usb_device *dev, int start_address,
330 int length, __u8 address_type, __u8 *buffer)
331 {
332 int status = 0;
333 __u8 read_length;
334 u16 be_start_address;
335
336 dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length);
337
338 /*
339 * Read in blocks of 64 bytes
340 * (TI firmware can't handle more than 64 byte reads)
341 */
342 while (length) {
343 if (length > 64)
344 read_length = 64;
345 else
346 read_length = (__u8)length;
347
348 if (read_length > 1) {
349 dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length);
350 }
351 /*
352 * NOTE: Must use swab as wIndex is sent in little-endian
353 * byte order regardless of host byte order.
354 */
355 be_start_address = swab16((u16)start_address);
356 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
357 (__u16)address_type,
358 be_start_address,
359 buffer, read_length);
360
361 if (status) {
362 dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status);
363 return status;
364 }
365
366 if (read_length > 1)
367 usb_serial_debug_data(&dev->dev, __func__, read_length, buffer);
368
369 /* Update pointers/length */
370 start_address += read_length;
371 buffer += read_length;
372 length -= read_length;
373 }
374
375 return status;
376 }
377
378 static int read_ram(struct usb_device *dev, int start_address,
379 int length, __u8 *buffer)
380 {
381 return read_download_mem(dev, start_address, length,
382 DTK_ADDR_SPACE_XDATA, buffer);
383 }
384
385 /* Read edgeport memory to a given block */
386 static int read_boot_mem(struct edgeport_serial *serial,
387 int start_address, int length, __u8 *buffer)
388 {
389 int status = 0;
390 int i;
391
392 for (i = 0; i < length; i++) {
393 status = ti_vread_sync(serial->serial->dev,
394 UMPC_MEMORY_READ, serial->TI_I2C_Type,
395 (__u16)(start_address+i), &buffer[i], 0x01);
396 if (status) {
397 dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status);
398 return status;
399 }
400 }
401
402 dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n",
403 __func__, start_address, length);
404 usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
405
406 serial->TiReadI2C = 1;
407
408 return status;
409 }
410
411 /* Write given block to TI EPROM memory */
412 static int write_boot_mem(struct edgeport_serial *serial,
413 int start_address, int length, __u8 *buffer)
414 {
415 int status = 0;
416 int i;
417 u8 *temp;
418
419 /* Must do a read before write */
420 if (!serial->TiReadI2C) {
421 temp = kmalloc(1, GFP_KERNEL);
422 if (!temp)
423 return -ENOMEM;
424
425 status = read_boot_mem(serial, 0, 1, temp);
426 kfree(temp);
427 if (status)
428 return status;
429 }
430
431 for (i = 0; i < length; ++i) {
432 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
433 buffer[i], (u16)(i + start_address), NULL,
434 0, TI_VSEND_TIMEOUT_DEFAULT);
435 if (status)
436 return status;
437 }
438
439 dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length);
440 usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
441
442 return status;
443 }
444
445 /* Write edgeport I2C memory to TI chip */
446 static int write_i2c_mem(struct edgeport_serial *serial,
447 int start_address, int length, __u8 address_type, __u8 *buffer)
448 {
449 struct device *dev = &serial->serial->dev->dev;
450 int status = 0;
451 int write_length;
452 u16 be_start_address;
453
454 /* We can only send a maximum of 1 aligned byte page at a time */
455
456 /* calculate the number of bytes left in the first page */
457 write_length = EPROM_PAGE_SIZE -
458 (start_address & (EPROM_PAGE_SIZE - 1));
459
460 if (write_length > length)
461 write_length = length;
462
463 dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n",
464 __func__, start_address, write_length);
465 usb_serial_debug_data(dev, __func__, write_length, buffer);
466
467 /*
468 * Write first page.
469 *
470 * NOTE: Must use swab as wIndex is sent in little-endian byte order
471 * regardless of host byte order.
472 */
473 be_start_address = swab16((u16)start_address);
474 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
475 (u16)address_type, be_start_address,
476 buffer, write_length, TI_VSEND_TIMEOUT_DEFAULT);
477 if (status) {
478 dev_dbg(dev, "%s - ERROR %d\n", __func__, status);
479 return status;
480 }
481
482 length -= write_length;
483 start_address += write_length;
484 buffer += write_length;
485
486 /*
487 * We should be aligned now -- can write max page size bytes at a
488 * time.
489 */
490 while (length) {
491 if (length > EPROM_PAGE_SIZE)
492 write_length = EPROM_PAGE_SIZE;
493 else
494 write_length = length;
495
496 dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n",
497 __func__, start_address, write_length);
498 usb_serial_debug_data(dev, __func__, write_length, buffer);
499
500 /*
501 * Write next page.
502 *
503 * NOTE: Must use swab as wIndex is sent in little-endian byte
504 * order regardless of host byte order.
505 */
506 be_start_address = swab16((u16)start_address);
507 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
508 (u16)address_type, be_start_address, buffer,
509 write_length, TI_VSEND_TIMEOUT_DEFAULT);
510 if (status) {
511 dev_err(dev, "%s - ERROR %d\n", __func__, status);
512 return status;
513 }
514
515 length -= write_length;
516 start_address += write_length;
517 buffer += write_length;
518 }
519 return status;
520 }
521
522 /*
523 * Examine the UMP DMA registers and LSR
524 *
525 * Check the MSBit of the X and Y DMA byte count registers.
526 * A zero in this bit indicates that the TX DMA buffers are empty
527 * then check the TX Empty bit in the UART.
528 */
529 static int tx_active(struct edgeport_port *port)
530 {
531 int status;
532 struct out_endpoint_desc_block *oedb;
533 __u8 *lsr;
534 int bytes_left = 0;
535
536 oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
537 if (!oedb)
538 return -ENOMEM;
539
540 /*
541 * Sigh, that's right, just one byte, as not all platforms can
542 * do DMA from stack
543 */
544 lsr = kmalloc(1, GFP_KERNEL);
545 if (!lsr) {
546 kfree(oedb);
547 return -ENOMEM;
548 }
549 /* Read the DMA Count Registers */
550 status = read_ram(port->port->serial->dev, port->dma_address,
551 sizeof(*oedb), (void *)oedb);
552 if (status)
553 goto exit_is_tx_active;
554
555 dev_dbg(&port->port->dev, "%s - XByteCount 0x%X\n", __func__, oedb->XByteCount);
556
557 /* and the LSR */
558 status = read_ram(port->port->serial->dev,
559 port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
560
561 if (status)
562 goto exit_is_tx_active;
563 dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr);
564
565 /* If either buffer has data or we are transmitting then return TRUE */
566 if ((oedb->XByteCount & 0x80) != 0)
567 bytes_left += 64;
568
569 if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
570 bytes_left += 1;
571
572 /* We return Not Active if we get any kind of error */
573 exit_is_tx_active:
574 dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left);
575
576 kfree(lsr);
577 kfree(oedb);
578 return bytes_left;
579 }
580
581 static int choose_config(struct usb_device *dev)
582 {
583 /*
584 * There may be multiple configurations on this device, in which case
585 * we would need to read and parse all of them to find out which one
586 * we want. However, we just support one config at this point,
587 * configuration # 1, which is Config Descriptor 0.
588 */
589
590 dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n",
591 __func__, dev->config->desc.bNumInterfaces);
592 dev_dbg(&dev->dev, "%s - MAX Power = %d\n",
593 __func__, dev->config->desc.bMaxPower * 2);
594
595 if (dev->config->desc.bNumInterfaces != 1) {
596 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__);
597 return -ENODEV;
598 }
599
600 return 0;
601 }
602
603 static int read_rom(struct edgeport_serial *serial,
604 int start_address, int length, __u8 *buffer)
605 {
606 int status;
607
608 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
609 status = read_download_mem(serial->serial->dev,
610 start_address,
611 length,
612 serial->TI_I2C_Type,
613 buffer);
614 } else {
615 status = read_boot_mem(serial, start_address, length,
616 buffer);
617 }
618 return status;
619 }
620
621 static int write_rom(struct edgeport_serial *serial, int start_address,
622 int length, __u8 *buffer)
623 {
624 if (serial->product_info.TiMode == TI_MODE_BOOT)
625 return write_boot_mem(serial, start_address, length,
626 buffer);
627
628 if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
629 return write_i2c_mem(serial, start_address, length,
630 serial->TI_I2C_Type, buffer);
631 return -EINVAL;
632 }
633
634 /* Read a descriptor header from I2C based on type */
635 static int get_descriptor_addr(struct edgeport_serial *serial,
636 int desc_type, struct ti_i2c_desc *rom_desc)
637 {
638 int start_address;
639 int status;
640
641 /* Search for requested descriptor in I2C */
642 start_address = 2;
643 do {
644 status = read_rom(serial,
645 start_address,
646 sizeof(struct ti_i2c_desc),
647 (__u8 *)rom_desc);
648 if (status)
649 return 0;
650
651 if (rom_desc->Type == desc_type)
652 return start_address;
653
654 start_address = start_address + sizeof(struct ti_i2c_desc) +
655 le16_to_cpu(rom_desc->Size);
656
657 } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
658
659 return 0;
660 }
661
662 /* Validate descriptor checksum */
663 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
664 {
665 __u16 i;
666 __u8 cs = 0;
667
668 for (i = 0; i < le16_to_cpu(rom_desc->Size); i++)
669 cs = (__u8)(cs + buffer[i]);
670
671 if (cs != rom_desc->CheckSum) {
672 pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
673 return -EINVAL;
674 }
675 return 0;
676 }
677
678 /* Make sure that the I2C image is good */
679 static int check_i2c_image(struct edgeport_serial *serial)
680 {
681 struct device *dev = &serial->serial->dev->dev;
682 int status = 0;
683 struct ti_i2c_desc *rom_desc;
684 int start_address = 2;
685 __u8 *buffer;
686 __u16 ttype;
687
688 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
689 if (!rom_desc)
690 return -ENOMEM;
691
692 buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
693 if (!buffer) {
694 kfree(rom_desc);
695 return -ENOMEM;
696 }
697
698 /* Read the first byte (Signature0) must be 0x52 or 0x10 */
699 status = read_rom(serial, 0, 1, buffer);
700 if (status)
701 goto out;
702
703 if (*buffer != UMP5152 && *buffer != UMP3410) {
704 dev_err(dev, "%s - invalid buffer signature\n", __func__);
705 status = -ENODEV;
706 goto out;
707 }
708
709 do {
710 /* Validate the I2C */
711 status = read_rom(serial,
712 start_address,
713 sizeof(struct ti_i2c_desc),
714 (__u8 *)rom_desc);
715 if (status)
716 break;
717
718 if ((start_address + sizeof(struct ti_i2c_desc) +
719 le16_to_cpu(rom_desc->Size)) > TI_MAX_I2C_SIZE) {
720 status = -ENODEV;
721 dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__);
722 break;
723 }
724
725 dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type);
726
727 /* Skip type 2 record */
728 ttype = rom_desc->Type & 0x0f;
729 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
730 && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
731 /* Read the descriptor data */
732 status = read_rom(serial, start_address +
733 sizeof(struct ti_i2c_desc),
734 le16_to_cpu(rom_desc->Size),
735 buffer);
736 if (status)
737 break;
738
739 status = valid_csum(rom_desc, buffer);
740 if (status)
741 break;
742 }
743 start_address = start_address + sizeof(struct ti_i2c_desc) +
744 le16_to_cpu(rom_desc->Size);
745
746 } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
747 (start_address < TI_MAX_I2C_SIZE));
748
749 if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
750 (start_address > TI_MAX_I2C_SIZE))
751 status = -ENODEV;
752
753 out:
754 kfree(buffer);
755 kfree(rom_desc);
756 return status;
757 }
758
759 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
760 {
761 int status;
762 int start_address;
763 struct ti_i2c_desc *rom_desc;
764 struct edge_ti_manuf_descriptor *desc;
765 struct device *dev = &serial->serial->dev->dev;
766
767 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
768 if (!rom_desc)
769 return -ENOMEM;
770
771 start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
772 rom_desc);
773
774 if (!start_address) {
775 dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__);
776 status = -ENODEV;
777 goto exit;
778 }
779
780 /* Read the descriptor data */
781 status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
782 le16_to_cpu(rom_desc->Size), buffer);
783 if (status)
784 goto exit;
785
786 status = valid_csum(rom_desc, buffer);
787
788 desc = (struct edge_ti_manuf_descriptor *)buffer;
789 dev_dbg(dev, "%s - IonConfig 0x%x\n", __func__, desc->IonConfig);
790 dev_dbg(dev, "%s - Version %d\n", __func__, desc->Version);
791 dev_dbg(dev, "%s - Cpu/Board 0x%x\n", __func__, desc->CpuRev_BoardRev);
792 dev_dbg(dev, "%s - NumPorts %d\n", __func__, desc->NumPorts);
793 dev_dbg(dev, "%s - NumVirtualPorts %d\n", __func__, desc->NumVirtualPorts);
794 dev_dbg(dev, "%s - TotalPorts %d\n", __func__, desc->TotalPorts);
795
796 exit:
797 kfree(rom_desc);
798 return status;
799 }
800
801 /* Build firmware header used for firmware update */
802 static int build_i2c_fw_hdr(u8 *header, const struct firmware *fw)
803 {
804 __u8 *buffer;
805 int buffer_size;
806 int i;
807 __u8 cs = 0;
808 struct ti_i2c_desc *i2c_header;
809 struct ti_i2c_image_header *img_header;
810 struct ti_i2c_firmware_rec *firmware_rec;
811 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
812
813 /*
814 * In order to update the I2C firmware we must change the type 2 record
815 * to type 0xF2. This will force the UMP to come up in Boot Mode.
816 * Then while in boot mode, the driver will download the latest
817 * firmware (padded to 15.5k) into the UMP ram. And finally when the
818 * device comes back up in download mode the driver will cause the new
819 * firmware to be copied from the UMP Ram to I2C and the firmware will
820 * update the record type from 0xf2 to 0x02.
821 */
822
823 /*
824 * Allocate a 15.5k buffer + 2 bytes for version number (Firmware
825 * Record)
826 */
827 buffer_size = (((1024 * 16) - 512 ) +
828 sizeof(struct ti_i2c_firmware_rec));
829
830 buffer = kmalloc(buffer_size, GFP_KERNEL);
831 if (!buffer)
832 return -ENOMEM;
833
834 /* Set entire image of 0xffs */
835 memset(buffer, 0xff, buffer_size);
836
837 /* Copy version number into firmware record */
838 firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
839
840 firmware_rec->Ver_Major = fw_hdr->major_version;
841 firmware_rec->Ver_Minor = fw_hdr->minor_version;
842
843 /* Pointer to fw_down memory image */
844 img_header = (struct ti_i2c_image_header *)&fw->data[4];
845
846 memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
847 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
848 le16_to_cpu(img_header->Length));
849
850 for (i=0; i < buffer_size; i++) {
851 cs = (__u8)(cs + buffer[i]);
852 }
853
854 kfree(buffer);
855
856 /* Build new header */
857 i2c_header = (struct ti_i2c_desc *)header;
858 firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data;
859
860 i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK;
861 i2c_header->Size = cpu_to_le16(buffer_size);
862 i2c_header->CheckSum = cs;
863 firmware_rec->Ver_Major = fw_hdr->major_version;
864 firmware_rec->Ver_Minor = fw_hdr->minor_version;
865
866 return 0;
867 }
868
869 /* Try to figure out what type of I2c we have */
870 static int i2c_type_bootmode(struct edgeport_serial *serial)
871 {
872 struct device *dev = &serial->serial->dev->dev;
873 int status;
874 u8 *data;
875
876 data = kmalloc(1, GFP_KERNEL);
877 if (!data)
878 return -ENOMEM;
879
880 /* Try to read type 2 */
881 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
882 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
883 if (status)
884 dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status);
885 else
886 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
887 if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
888 dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__);
889 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
890 goto out;
891 }
892
893 /* Try to read type 3 */
894 status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
895 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
896 if (status)
897 dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status);
898 else
899 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
900 if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
901 dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__);
902 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
903 goto out;
904 }
905
906 dev_dbg(dev, "%s - Unknown\n", __func__);
907 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
908 status = -ENODEV;
909 out:
910 kfree(data);
911 return status;
912 }
913
914 static int bulk_xfer(struct usb_serial *serial, void *buffer,
915 int length, int *num_sent)
916 {
917 int status;
918
919 status = usb_bulk_msg(serial->dev,
920 usb_sndbulkpipe(serial->dev,
921 serial->port[0]->bulk_out_endpointAddress),
922 buffer, length, num_sent, 1000);
923 return status;
924 }
925
926 /* Download given firmware image to the device (IN BOOT MODE) */
927 static int download_code(struct edgeport_serial *serial, __u8 *image,
928 int image_length)
929 {
930 int status = 0;
931 int pos;
932 int transfer;
933 int done;
934
935 /* Transfer firmware image */
936 for (pos = 0; pos < image_length; ) {
937 /* Read the next buffer from file */
938 transfer = image_length - pos;
939 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
940 transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
941
942 /* Transfer data */
943 status = bulk_xfer(serial->serial, &image[pos],
944 transfer, &done);
945 if (status)
946 break;
947 /* Advance buffer pointer */
948 pos += done;
949 }
950
951 return status;
952 }
953
954 /* FIXME!!! */
955 static int config_boot_dev(struct usb_device *dev)
956 {
957 return 0;
958 }
959
960 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
961 {
962 return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
963 }
964
965 static int check_fw_sanity(struct edgeport_serial *serial,
966 const struct firmware *fw)
967 {
968 u16 length_total;
969 u8 checksum = 0;
970 int pos;
971 struct device *dev = &serial->serial->interface->dev;
972 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
973
974 if (fw->size < sizeof(struct edgeport_fw_hdr)) {
975 dev_err(dev, "incomplete fw header\n");
976 return -EINVAL;
977 }
978
979 length_total = le16_to_cpu(fw_hdr->length) +
980 sizeof(struct edgeport_fw_hdr);
981
982 if (fw->size != length_total) {
983 dev_err(dev, "bad fw size (expected: %u, got: %zu)\n",
984 length_total, fw->size);
985 return -EINVAL;
986 }
987
988 for (pos = sizeof(struct edgeport_fw_hdr); pos < fw->size; ++pos)
989 checksum += fw->data[pos];
990
991 if (checksum != fw_hdr->checksum) {
992 dev_err(dev, "bad fw checksum (expected: 0x%x, got: 0x%x)\n",
993 fw_hdr->checksum, checksum);
994 return -EINVAL;
995 }
996
997 return 0;
998 }
999
1000 /*
1001 * DownloadTIFirmware - Download run-time operating firmware to the TI5052
1002 *
1003 * This routine downloads the main operating code into the TI5052, using the
1004 * boot code already burned into E2PROM or ROM.
1005 */
1006 static int download_fw(struct edgeport_serial *serial)
1007 {
1008 struct device *dev = &serial->serial->interface->dev;
1009 int status = 0;
1010 struct usb_interface_descriptor *interface;
1011 const struct firmware *fw;
1012 const char *fw_name = "edgeport/down3.bin";
1013 struct edgeport_fw_hdr *fw_hdr;
1014
1015 status = request_firmware(&fw, fw_name, dev);
1016 if (status) {
1017 dev_err(dev, "Failed to load image \"%s\" err %d\n",
1018 fw_name, status);
1019 return status;
1020 }
1021
1022 if (check_fw_sanity(serial, fw)) {
1023 status = -EINVAL;
1024 goto out;
1025 }
1026
1027 fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1028
1029 /* If on-board version is newer, "fw_version" will be updated later. */
1030 serial->fw_version = (fw_hdr->major_version << 8) +
1031 fw_hdr->minor_version;
1032
1033 /*
1034 * This routine is entered by both the BOOT mode and the Download mode
1035 * We can determine which code is running by the reading the config
1036 * descriptor and if we have only one bulk pipe it is in boot mode
1037 */
1038 serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1039
1040 /* Default to type 2 i2c */
1041 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1042
1043 status = choose_config(serial->serial->dev);
1044 if (status)
1045 goto out;
1046
1047 interface = &serial->serial->interface->cur_altsetting->desc;
1048 if (!interface) {
1049 dev_err(dev, "%s - no interface set, error!\n", __func__);
1050 status = -ENODEV;
1051 goto out;
1052 }
1053
1054 /*
1055 * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1056 * if we have more than one endpoint we are definitely in download
1057 * mode
1058 */
1059 if (interface->bNumEndpoints > 1) {
1060 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1061 status = do_download_mode(serial, fw);
1062 } else {
1063 /* Otherwise we will remain in configuring mode */
1064 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1065 status = do_boot_mode(serial, fw);
1066 }
1067
1068 out:
1069 release_firmware(fw);
1070 return status;
1071 }
1072
1073 static int do_download_mode(struct edgeport_serial *serial,
1074 const struct firmware *fw)
1075 {
1076 struct device *dev = &serial->serial->interface->dev;
1077 int status = 0;
1078 int start_address;
1079 struct edge_ti_manuf_descriptor *ti_manuf_desc;
1080 int download_cur_ver;
1081 int download_new_ver;
1082 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1083 struct ti_i2c_desc *rom_desc;
1084
1085 dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__);
1086
1087 status = check_i2c_image(serial);
1088 if (status) {
1089 dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__);
1090 return status;
1091 }
1092
1093 /*
1094 * Validate Hardware version number
1095 * Read Manufacturing Descriptor from TI Based Edgeport
1096 */
1097 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1098 if (!ti_manuf_desc)
1099 return -ENOMEM;
1100
1101 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1102 if (status) {
1103 kfree(ti_manuf_desc);
1104 return status;
1105 }
1106
1107 /* Check version number of ION descriptor */
1108 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1109 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1110 __func__, ti_cpu_rev(ti_manuf_desc));
1111 kfree(ti_manuf_desc);
1112 return -EINVAL;
1113 }
1114
1115 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1116 if (!rom_desc) {
1117 kfree(ti_manuf_desc);
1118 return -ENOMEM;
1119 }
1120
1121 /* Search for type 2 record (firmware record) */
1122 start_address = get_descriptor_addr(serial,
1123 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1124 if (start_address != 0) {
1125 struct ti_i2c_firmware_rec *firmware_version;
1126 u8 *record;
1127
1128 dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n",
1129 __func__);
1130
1131 firmware_version = kmalloc(sizeof(*firmware_version),
1132 GFP_KERNEL);
1133 if (!firmware_version) {
1134 kfree(rom_desc);
1135 kfree(ti_manuf_desc);
1136 return -ENOMEM;
1137 }
1138
1139 /*
1140 * Validate version number
1141 * Read the descriptor data
1142 */
1143 status = read_rom(serial, start_address +
1144 sizeof(struct ti_i2c_desc),
1145 sizeof(struct ti_i2c_firmware_rec),
1146 (__u8 *)firmware_version);
1147 if (status) {
1148 kfree(firmware_version);
1149 kfree(rom_desc);
1150 kfree(ti_manuf_desc);
1151 return status;
1152 }
1153
1154 /*
1155 * Check version number of download with current
1156 * version in I2c
1157 */
1158 download_cur_ver = (firmware_version->Ver_Major << 8) +
1159 (firmware_version->Ver_Minor);
1160 download_new_ver = (fw_hdr->major_version << 8) +
1161 (fw_hdr->minor_version);
1162
1163 dev_dbg(dev, "%s - >> FW Versions Device %d.%d Driver %d.%d\n",
1164 __func__, firmware_version->Ver_Major,
1165 firmware_version->Ver_Minor,
1166 fw_hdr->major_version, fw_hdr->minor_version);
1167
1168 /*
1169 * Check if we have an old version in the I2C and
1170 * update if necessary
1171 */
1172 if (download_cur_ver < download_new_ver) {
1173 dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n",
1174 __func__,
1175 firmware_version->Ver_Major,
1176 firmware_version->Ver_Minor,
1177 fw_hdr->major_version,
1178 fw_hdr->minor_version);
1179
1180 record = kmalloc(1, GFP_KERNEL);
1181 if (!record) {
1182 kfree(firmware_version);
1183 kfree(rom_desc);
1184 kfree(ti_manuf_desc);
1185 return -ENOMEM;
1186 }
1187 /*
1188 * In order to update the I2C firmware we must
1189 * change the type 2 record to type 0xF2. This
1190 * will force the UMP to come up in Boot Mode.
1191 * Then while in boot mode, the driver will
1192 * download the latest firmware (padded to
1193 * 15.5k) into the UMP ram. Finally when the
1194 * device comes back up in download mode the
1195 * driver will cause the new firmware to be
1196 * copied from the UMP Ram to I2C and the
1197 * firmware will update the record type from
1198 * 0xf2 to 0x02.
1199 */
1200 *record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1201
1202 /*
1203 * Change the I2C Firmware record type to
1204 * 0xf2 to trigger an update
1205 */
1206 status = write_rom(serial, start_address,
1207 sizeof(*record), record);
1208 if (status) {
1209 kfree(record);
1210 kfree(firmware_version);
1211 kfree(rom_desc);
1212 kfree(ti_manuf_desc);
1213 return status;
1214 }
1215
1216 /*
1217 * verify the write -- must do this in order
1218 * for write to complete before we do the
1219 * hardware reset
1220 */
1221 status = read_rom(serial,
1222 start_address,
1223 sizeof(*record),
1224 record);
1225 if (status) {
1226 kfree(record);
1227 kfree(firmware_version);
1228 kfree(rom_desc);
1229 kfree(ti_manuf_desc);
1230 return status;
1231 }
1232
1233 if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1234 dev_err(dev, "%s - error resetting device\n",
1235 __func__);
1236 kfree(record);
1237 kfree(firmware_version);
1238 kfree(rom_desc);
1239 kfree(ti_manuf_desc);
1240 return -ENODEV;
1241 }
1242
1243 dev_dbg(dev, "%s - HARDWARE RESET\n", __func__);
1244
1245 /* Reset UMP -- Back to BOOT MODE */
1246 status = ti_vsend_sync(serial->serial->dev,
1247 UMPC_HARDWARE_RESET,
1248 0, 0, NULL, 0,
1249 TI_VSEND_TIMEOUT_DEFAULT);
1250
1251 dev_dbg(dev, "%s - HARDWARE RESET return %d\n",
1252 __func__, status);
1253
1254 /* return an error on purpose. */
1255 kfree(record);
1256 kfree(firmware_version);
1257 kfree(rom_desc);
1258 kfree(ti_manuf_desc);
1259 return -ENODEV;
1260 }
1261 /* Same or newer fw version is already loaded */
1262 serial->fw_version = download_cur_ver;
1263 kfree(firmware_version);
1264 }
1265 /* Search for type 0xF2 record (firmware blank record) */
1266 else {
1267 start_address = get_descriptor_addr(serial,
1268 I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc);
1269 if (start_address != 0) {
1270 #define HEADER_SIZE (sizeof(struct ti_i2c_desc) + \
1271 sizeof(struct ti_i2c_firmware_rec))
1272 __u8 *header;
1273 __u8 *vheader;
1274
1275 header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1276 if (!header) {
1277 kfree(rom_desc);
1278 kfree(ti_manuf_desc);
1279 return -ENOMEM;
1280 }
1281
1282 vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1283 if (!vheader) {
1284 kfree(header);
1285 kfree(rom_desc);
1286 kfree(ti_manuf_desc);
1287 return -ENOMEM;
1288 }
1289
1290 dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n",
1291 __func__);
1292
1293 /*
1294 * In order to update the I2C firmware we must change
1295 * the type 2 record to type 0xF2. This will force the
1296 * UMP to come up in Boot Mode. Then while in boot
1297 * mode, the driver will download the latest firmware
1298 * (padded to 15.5k) into the UMP ram. Finally when the
1299 * device comes back up in download mode the driver
1300 * will cause the new firmware to be copied from the
1301 * UMP Ram to I2C and the firmware will update the
1302 * record type from 0xf2 to 0x02.
1303 */
1304 status = build_i2c_fw_hdr(header, fw);
1305 if (status) {
1306 kfree(vheader);
1307 kfree(header);
1308 kfree(rom_desc);
1309 kfree(ti_manuf_desc);
1310 return -EINVAL;
1311 }
1312
1313 /*
1314 * Update I2C with type 0xf2 record with correct
1315 * size and checksum
1316 */
1317 status = write_rom(serial,
1318 start_address,
1319 HEADER_SIZE,
1320 header);
1321 if (status) {
1322 kfree(vheader);
1323 kfree(header);
1324 kfree(rom_desc);
1325 kfree(ti_manuf_desc);
1326 return -EINVAL;
1327 }
1328
1329 /*
1330 * verify the write -- must do this in order for
1331 * write to complete before we do the hardware reset
1332 */
1333 status = read_rom(serial, start_address,
1334 HEADER_SIZE, vheader);
1335
1336 if (status) {
1337 dev_dbg(dev, "%s - can't read header back\n",
1338 __func__);
1339 kfree(vheader);
1340 kfree(header);
1341 kfree(rom_desc);
1342 kfree(ti_manuf_desc);
1343 return status;
1344 }
1345 if (memcmp(vheader, header, HEADER_SIZE)) {
1346 dev_dbg(dev, "%s - write download record failed\n",
1347 __func__);
1348 kfree(vheader);
1349 kfree(header);
1350 kfree(rom_desc);
1351 kfree(ti_manuf_desc);
1352 return -EINVAL;
1353 }
1354
1355 kfree(vheader);
1356 kfree(header);
1357
1358 dev_dbg(dev, "%s - Start firmware update\n", __func__);
1359
1360 /* Tell firmware to copy download image into I2C */
1361 status = ti_vsend_sync(serial->serial->dev,
1362 UMPC_COPY_DNLD_TO_I2C,
1363 0, 0, NULL, 0,
1364 TI_VSEND_TIMEOUT_FW_DOWNLOAD);
1365
1366 dev_dbg(dev, "%s - Update complete 0x%x\n", __func__,
1367 status);
1368 if (status) {
1369 dev_err(dev,
1370 "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1371 __func__);
1372 kfree(rom_desc);
1373 kfree(ti_manuf_desc);
1374 return status;
1375 }
1376 }
1377 }
1378
1379 /* The device is running the download code */
1380 kfree(rom_desc);
1381 kfree(ti_manuf_desc);
1382 return 0;
1383 }
1384
1385 static int do_boot_mode(struct edgeport_serial *serial,
1386 const struct firmware *fw)
1387 {
1388 struct device *dev = &serial->serial->interface->dev;
1389 int status = 0;
1390 struct edge_ti_manuf_descriptor *ti_manuf_desc;
1391 struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1392
1393 dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__);
1394
1395 /* Configure the TI device so we can use the BULK pipes for download */
1396 status = config_boot_dev(serial->serial->dev);
1397 if (status)
1398 return status;
1399
1400 if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1401 != USB_VENDOR_ID_ION) {
1402 dev_dbg(dev, "%s - VID = 0x%x\n", __func__,
1403 le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1404 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1405 goto stayinbootmode;
1406 }
1407
1408 /*
1409 * We have an ION device (I2c Must be programmed)
1410 * Determine I2C image type
1411 */
1412 if (i2c_type_bootmode(serial))
1413 goto stayinbootmode;
1414
1415 /* Check for ION Vendor ID and that the I2C is valid */
1416 if (!check_i2c_image(serial)) {
1417 struct ti_i2c_image_header *header;
1418 int i;
1419 __u8 cs = 0;
1420 __u8 *buffer;
1421 int buffer_size;
1422
1423 /*
1424 * Validate Hardware version number
1425 * Read Manufacturing Descriptor from TI Based Edgeport
1426 */
1427 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1428 if (!ti_manuf_desc)
1429 return -ENOMEM;
1430
1431 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1432 if (status) {
1433 kfree(ti_manuf_desc);
1434 goto stayinbootmode;
1435 }
1436
1437 /* Check for version 2 */
1438 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1439 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1440 __func__, ti_cpu_rev(ti_manuf_desc));
1441 kfree(ti_manuf_desc);
1442 goto stayinbootmode;
1443 }
1444
1445 kfree(ti_manuf_desc);
1446
1447 /*
1448 * In order to update the I2C firmware we must change the type
1449 * 2 record to type 0xF2. This will force the UMP to come up
1450 * in Boot Mode. Then while in boot mode, the driver will
1451 * download the latest firmware (padded to 15.5k) into the
1452 * UMP ram. Finally when the device comes back up in download
1453 * mode the driver will cause the new firmware to be copied
1454 * from the UMP Ram to I2C and the firmware will update the
1455 * record type from 0xf2 to 0x02.
1456 *
1457 * Do we really have to copy the whole firmware image,
1458 * or could we do this in place!
1459 */
1460
1461 /* Allocate a 15.5k buffer + 3 byte header */
1462 buffer_size = (((1024 * 16) - 512) +
1463 sizeof(struct ti_i2c_image_header));
1464 buffer = kmalloc(buffer_size, GFP_KERNEL);
1465 if (!buffer)
1466 return -ENOMEM;
1467
1468 /* Initialize the buffer to 0xff (pad the buffer) */
1469 memset(buffer, 0xff, buffer_size);
1470 memcpy(buffer, &fw->data[4], fw->size - 4);
1471
1472 for (i = sizeof(struct ti_i2c_image_header);
1473 i < buffer_size; i++) {
1474 cs = (__u8)(cs + buffer[i]);
1475 }
1476
1477 header = (struct ti_i2c_image_header *)buffer;
1478
1479 /* update length and checksum after padding */
1480 header->Length = cpu_to_le16((__u16)(buffer_size -
1481 sizeof(struct ti_i2c_image_header)));
1482 header->CheckSum = cs;
1483
1484 /* Download the operational code */
1485 dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n",
1486 __func__,
1487 fw_hdr->major_version, fw_hdr->minor_version);
1488 status = download_code(serial, buffer, buffer_size);
1489
1490 kfree(buffer);
1491
1492 if (status) {
1493 dev_dbg(dev, "%s - Error downloading operational code image\n", __func__);
1494 return status;
1495 }
1496
1497 /* Device will reboot */
1498 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1499
1500 dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__);
1501
1502 return 1;
1503 }
1504
1505 stayinbootmode:
1506 /* Eprom is invalid or blank stay in boot mode */
1507 dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__);
1508 serial->product_info.TiMode = TI_MODE_BOOT;
1509
1510 return 1;
1511 }
1512
1513 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1514 {
1515 int port_number = port->port->port_number;
1516
1517 on = !!on; /* 1 or 0 not bitmask */
1518 return send_cmd(port->port->serial->dev,
1519 feature, (__u8)(UMPM_UART1_PORT + port_number),
1520 on, NULL, 0);
1521 }
1522
1523 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1524 {
1525 int status = 0;
1526
1527 dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr);
1528
1529 status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1530 if (status)
1531 return status;
1532 status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1533 if (status)
1534 return status;
1535 return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1536 }
1537
1538 /* Convert TI LSR to standard UART flags */
1539 static __u8 map_line_status(__u8 ti_lsr)
1540 {
1541 __u8 lsr = 0;
1542
1543 #define MAP_FLAG(flagUmp, flagUart) \
1544 if (ti_lsr & flagUmp) \
1545 lsr |= flagUart;
1546
1547 MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR) /* overrun */
1548 MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR) /* parity error */
1549 MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR) /* framing error */
1550 MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK) /* break detected */
1551 MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL) /* rx data available */
1552 MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY) /* tx hold reg empty */
1553
1554 #undef MAP_FLAG
1555
1556 return lsr;
1557 }
1558
1559 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1560 {
1561 struct async_icount *icount;
1562 struct tty_struct *tty;
1563
1564 dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr);
1565
1566 if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1567 EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1568 icount = &edge_port->port->icount;
1569
1570 /* update input line counters */
1571 if (msr & EDGEPORT_MSR_DELTA_CTS)
1572 icount->cts++;
1573 if (msr & EDGEPORT_MSR_DELTA_DSR)
1574 icount->dsr++;
1575 if (msr & EDGEPORT_MSR_DELTA_CD)
1576 icount->dcd++;
1577 if (msr & EDGEPORT_MSR_DELTA_RI)
1578 icount->rng++;
1579 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1580 }
1581
1582 /* Save the new modem status */
1583 edge_port->shadow_msr = msr & 0xf0;
1584
1585 tty = tty_port_tty_get(&edge_port->port->port);
1586 /* handle CTS flow control */
1587 if (tty && C_CRTSCTS(tty)) {
1588 if (msr & EDGEPORT_MSR_CTS)
1589 tty_wakeup(tty);
1590 }
1591 tty_kref_put(tty);
1592 }
1593
1594 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1595 __u8 lsr, __u8 data)
1596 {
1597 struct async_icount *icount;
1598 __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1599 LSR_FRM_ERR | LSR_BREAK));
1600
1601 dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr);
1602
1603 edge_port->shadow_lsr = lsr;
1604
1605 if (new_lsr & LSR_BREAK)
1606 /*
1607 * Parity and Framing errors only count if they
1608 * occur exclusive of a break being received.
1609 */
1610 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1611
1612 /* Place LSR data byte into Rx buffer */
1613 if (lsr_data)
1614 edge_tty_recv(edge_port->port, &data, 1);
1615
1616 /* update input line counters */
1617 icount = &edge_port->port->icount;
1618 if (new_lsr & LSR_BREAK)
1619 icount->brk++;
1620 if (new_lsr & LSR_OVER_ERR)
1621 icount->overrun++;
1622 if (new_lsr & LSR_PAR_ERR)
1623 icount->parity++;
1624 if (new_lsr & LSR_FRM_ERR)
1625 icount->frame++;
1626 }
1627
1628 static void edge_interrupt_callback(struct urb *urb)
1629 {
1630 struct edgeport_serial *edge_serial = urb->context;
1631 struct usb_serial_port *port;
1632 struct edgeport_port *edge_port;
1633 struct device *dev;
1634 unsigned char *data = urb->transfer_buffer;
1635 int length = urb->actual_length;
1636 int port_number;
1637 int function;
1638 int retval;
1639 __u8 lsr;
1640 __u8 msr;
1641 int status = urb->status;
1642
1643 switch (status) {
1644 case 0:
1645 /* success */
1646 break;
1647 case -ECONNRESET:
1648 case -ENOENT:
1649 case -ESHUTDOWN:
1650 /* this urb is terminated, clean up */
1651 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1652 __func__, status);
1653 return;
1654 default:
1655 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1656 "%d\n", __func__, status);
1657 goto exit;
1658 }
1659
1660 if (!length) {
1661 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__);
1662 goto exit;
1663 }
1664
1665 dev = &edge_serial->serial->dev->dev;
1666 usb_serial_debug_data(dev, __func__, length, data);
1667
1668 if (length != 2) {
1669 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length);
1670 goto exit;
1671 }
1672
1673 port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1674 function = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1675 dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
1676 port_number, function, data[1]);
1677
1678 if (port_number >= edge_serial->serial->num_ports) {
1679 dev_err(dev, "bad port number %d\n", port_number);
1680 goto exit;
1681 }
1682
1683 port = edge_serial->serial->port[port_number];
1684 edge_port = usb_get_serial_port_data(port);
1685 if (!edge_port) {
1686 dev_dbg(dev, "%s - edge_port not found\n", __func__);
1687 return;
1688 }
1689 switch (function) {
1690 case TIUMP_INTERRUPT_CODE_LSR:
1691 lsr = map_line_status(data[1]);
1692 if (lsr & UMP_UART_LSR_DATA_MASK) {
1693 /*
1694 * Save the LSR event for bulk read completion routine
1695 */
1696 dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n",
1697 __func__, port_number, lsr);
1698 edge_port->lsr_event = 1;
1699 edge_port->lsr_mask = lsr;
1700 } else {
1701 dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n",
1702 __func__, port_number, lsr);
1703 handle_new_lsr(edge_port, 0, lsr, 0);
1704 }
1705 break;
1706
1707 case TIUMP_INTERRUPT_CODE_MSR: /* MSR */
1708 /* Copy MSR from UMP */
1709 msr = data[1];
1710 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n",
1711 __func__, port_number, msr);
1712 handle_new_msr(edge_port, msr);
1713 break;
1714
1715 default:
1716 dev_err(&urb->dev->dev,
1717 "%s - Unknown Interrupt code from UMP %x\n",
1718 __func__, data[1]);
1719 break;
1720
1721 }
1722
1723 exit:
1724 retval = usb_submit_urb(urb, GFP_ATOMIC);
1725 if (retval)
1726 dev_err(&urb->dev->dev,
1727 "%s - usb_submit_urb failed with result %d\n",
1728 __func__, retval);
1729 }
1730
1731 static void edge_bulk_in_callback(struct urb *urb)
1732 {
1733 struct edgeport_port *edge_port = urb->context;
1734 struct device *dev = &edge_port->port->dev;
1735 unsigned char *data = urb->transfer_buffer;
1736 int retval = 0;
1737 int port_number;
1738 int status = urb->status;
1739
1740 switch (status) {
1741 case 0:
1742 /* success */
1743 break;
1744 case -ECONNRESET:
1745 case -ENOENT:
1746 case -ESHUTDOWN:
1747 /* this urb is terminated, clean up */
1748 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
1749 return;
1750 default:
1751 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status);
1752 }
1753
1754 if (status == -EPIPE)
1755 goto exit;
1756
1757 if (status) {
1758 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1759 return;
1760 }
1761
1762 port_number = edge_port->port->port_number;
1763
1764 if (urb->actual_length > 0 && edge_port->lsr_event) {
1765 edge_port->lsr_event = 0;
1766 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n",
1767 __func__, port_number, edge_port->lsr_mask, *data);
1768 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1769 /* Adjust buffer length/pointer */
1770 --urb->actual_length;
1771 ++data;
1772 }
1773
1774 if (urb->actual_length) {
1775 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
1776 if (edge_port->close_pending)
1777 dev_dbg(dev, "%s - close pending, dropping data on the floor\n",
1778 __func__);
1779 else
1780 edge_tty_recv(edge_port->port, data,
1781 urb->actual_length);
1782 edge_port->port->icount.rx += urb->actual_length;
1783 }
1784
1785 exit:
1786 /* continue read unless stopped */
1787 spin_lock(&edge_port->ep_lock);
1788 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1789 retval = usb_submit_urb(urb, GFP_ATOMIC);
1790 else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1791 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1792
1793 spin_unlock(&edge_port->ep_lock);
1794 if (retval)
1795 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);
1796 }
1797
1798 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1799 int length)
1800 {
1801 int queued;
1802
1803 queued = tty_insert_flip_string(&port->port, data, length);
1804 if (queued < length)
1805 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1806 __func__, length - queued);
1807 tty_flip_buffer_push(&port->port);
1808 }
1809
1810 static void edge_bulk_out_callback(struct urb *urb)
1811 {
1812 struct usb_serial_port *port = urb->context;
1813 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1814 int status = urb->status;
1815 struct tty_struct *tty;
1816
1817 edge_port->ep_write_urb_in_use = 0;
1818
1819 switch (status) {
1820 case 0:
1821 /* success */
1822 break;
1823 case -ECONNRESET:
1824 case -ENOENT:
1825 case -ESHUTDOWN:
1826 /* this urb is terminated, clean up */
1827 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1828 __func__, status);
1829 return;
1830 default:
1831 dev_err_console(port, "%s - nonzero write bulk status "
1832 "received: %d\n", __func__, status);
1833 }
1834
1835 /* send any buffered data */
1836 tty = tty_port_tty_get(&port->port);
1837 edge_send(port, tty);
1838 tty_kref_put(tty);
1839 }
1840
1841 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1842 {
1843 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1844 struct edgeport_serial *edge_serial;
1845 struct usb_device *dev;
1846 struct urb *urb;
1847 int port_number;
1848 int status;
1849 u16 open_settings;
1850 u8 transaction_timeout;
1851
1852 if (edge_port == NULL)
1853 return -ENODEV;
1854
1855 port_number = port->port_number;
1856
1857 dev = port->serial->dev;
1858
1859 /* turn off loopback */
1860 status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1861 if (status) {
1862 dev_err(&port->dev,
1863 "%s - cannot send clear loopback command, %d\n",
1864 __func__, status);
1865 return status;
1866 }
1867
1868 /* set up the port settings */
1869 if (tty)
1870 edge_set_termios(tty, port, &tty->termios);
1871
1872 /* open up the port */
1873
1874 /* milliseconds to timeout for DMA transfer */
1875 transaction_timeout = 2;
1876
1877 edge_port->ump_read_timeout =
1878 max(20, ((transaction_timeout * 3) / 2));
1879
1880 /* milliseconds to timeout for DMA transfer */
1881 open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1882 UMP_PIPE_TRANS_TIMEOUT_ENA |
1883 (transaction_timeout << 2));
1884
1885 dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__);
1886
1887 /* Tell TI to open and start the port */
1888 status = send_cmd(dev, UMPC_OPEN_PORT,
1889 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1890 if (status) {
1891 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1892 __func__, status);
1893 return status;
1894 }
1895
1896 /* Start the DMA? */
1897 status = send_cmd(dev, UMPC_START_PORT,
1898 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1899 if (status) {
1900 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1901 __func__, status);
1902 return status;
1903 }
1904
1905 /* Clear TX and RX buffers in UMP */
1906 status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1907 if (status) {
1908 dev_err(&port->dev,
1909 "%s - cannot send clear buffers command, %d\n",
1910 __func__, status);
1911 return status;
1912 }
1913
1914 /* Read Initial MSR */
1915 status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1916 (__u16)(UMPM_UART1_PORT + port_number),
1917 &edge_port->shadow_msr, 1);
1918 if (status) {
1919 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1920 __func__, status);
1921 return status;
1922 }
1923
1924 dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr);
1925
1926 /* Set Initial MCR */
1927 edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1928 dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr);
1929
1930 edge_serial = edge_port->edge_serial;
1931 if (mutex_lock_interruptible(&edge_serial->es_lock))
1932 return -ERESTARTSYS;
1933 if (edge_serial->num_ports_open == 0) {
1934 /* we are the first port to open, post the interrupt urb */
1935 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1936 if (!urb) {
1937 dev_err(&port->dev,
1938 "%s - no interrupt urb present, exiting\n",
1939 __func__);
1940 status = -EINVAL;
1941 goto release_es_lock;
1942 }
1943 urb->context = edge_serial;
1944 status = usb_submit_urb(urb, GFP_KERNEL);
1945 if (status) {
1946 dev_err(&port->dev,
1947 "%s - usb_submit_urb failed with value %d\n",
1948 __func__, status);
1949 goto release_es_lock;
1950 }
1951 }
1952
1953 /*
1954 * reset the data toggle on the bulk endpoints to work around bug in
1955 * host controllers where things get out of sync some times
1956 */
1957 usb_clear_halt(dev, port->write_urb->pipe);
1958 usb_clear_halt(dev, port->read_urb->pipe);
1959
1960 /* start up our bulk read urb */
1961 urb = port->read_urb;
1962 if (!urb) {
1963 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1964 __func__);
1965 status = -EINVAL;
1966 goto unlink_int_urb;
1967 }
1968 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1969 urb->context = edge_port;
1970 status = usb_submit_urb(urb, GFP_KERNEL);
1971 if (status) {
1972 dev_err(&port->dev,
1973 "%s - read bulk usb_submit_urb failed with value %d\n",
1974 __func__, status);
1975 goto unlink_int_urb;
1976 }
1977
1978 ++edge_serial->num_ports_open;
1979
1980 goto release_es_lock;
1981
1982 unlink_int_urb:
1983 if (edge_port->edge_serial->num_ports_open == 0)
1984 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1985 release_es_lock:
1986 mutex_unlock(&edge_serial->es_lock);
1987 return status;
1988 }
1989
1990 static void edge_close(struct usb_serial_port *port)
1991 {
1992 struct edgeport_serial *edge_serial;
1993 struct edgeport_port *edge_port;
1994 struct usb_serial *serial = port->serial;
1995 unsigned long flags;
1996 int port_number;
1997
1998 edge_serial = usb_get_serial_data(port->serial);
1999 edge_port = usb_get_serial_port_data(port);
2000 if (edge_serial == NULL || edge_port == NULL)
2001 return;
2002
2003 /*
2004 * The bulkreadcompletion routine will check
2005 * this flag and dump add read data
2006 */
2007 edge_port->close_pending = 1;
2008
2009 usb_kill_urb(port->read_urb);
2010 usb_kill_urb(port->write_urb);
2011 edge_port->ep_write_urb_in_use = 0;
2012 spin_lock_irqsave(&edge_port->ep_lock, flags);
2013 kfifo_reset_out(&port->write_fifo);
2014 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2015
2016 dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
2017 port_number = port->port_number;
2018 send_cmd(serial->dev, UMPC_CLOSE_PORT,
2019 (__u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
2020
2021 mutex_lock(&edge_serial->es_lock);
2022 --edge_port->edge_serial->num_ports_open;
2023 if (edge_port->edge_serial->num_ports_open <= 0) {
2024 /* last port is now closed, let's shut down our interrupt urb */
2025 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2026 edge_port->edge_serial->num_ports_open = 0;
2027 }
2028 mutex_unlock(&edge_serial->es_lock);
2029 edge_port->close_pending = 0;
2030 }
2031
2032 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
2033 const unsigned char *data, int count)
2034 {
2035 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2036
2037 if (count == 0) {
2038 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
2039 return 0;
2040 }
2041
2042 if (edge_port == NULL)
2043 return -ENODEV;
2044 if (edge_port->close_pending == 1)
2045 return -ENODEV;
2046
2047 count = kfifo_in_locked(&port->write_fifo, data, count,
2048 &edge_port->ep_lock);
2049 edge_send(port, tty);
2050
2051 return count;
2052 }
2053
2054 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty)
2055 {
2056 int count, result;
2057 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2058 unsigned long flags;
2059
2060 spin_lock_irqsave(&edge_port->ep_lock, flags);
2061
2062 if (edge_port->ep_write_urb_in_use) {
2063 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2064 return;
2065 }
2066
2067 count = kfifo_out(&port->write_fifo,
2068 port->write_urb->transfer_buffer,
2069 port->bulk_out_size);
2070
2071 if (count == 0) {
2072 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2073 return;
2074 }
2075
2076 edge_port->ep_write_urb_in_use = 1;
2077
2078 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2079
2080 usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer);
2081
2082 /* set up our urb */
2083 port->write_urb->transfer_buffer_length = count;
2084
2085 /* send the data out the bulk port */
2086 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2087 if (result) {
2088 dev_err_console(port,
2089 "%s - failed submitting write urb, error %d\n",
2090 __func__, result);
2091 edge_port->ep_write_urb_in_use = 0;
2092 /* TODO: reschedule edge_send */
2093 } else
2094 edge_port->port->icount.tx += count;
2095
2096 /*
2097 * wakeup any process waiting for writes to complete
2098 * there is now more room in the buffer for new writes
2099 */
2100 if (tty)
2101 tty_wakeup(tty);
2102 }
2103
2104 static int edge_write_room(struct tty_struct *tty)
2105 {
2106 struct usb_serial_port *port = tty->driver_data;
2107 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2108 int room = 0;
2109 unsigned long flags;
2110
2111 if (edge_port == NULL)
2112 return 0;
2113 if (edge_port->close_pending == 1)
2114 return 0;
2115
2116 spin_lock_irqsave(&edge_port->ep_lock, flags);
2117 room = kfifo_avail(&port->write_fifo);
2118 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2119
2120 dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
2121 return room;
2122 }
2123
2124 static int edge_chars_in_buffer(struct tty_struct *tty)
2125 {
2126 struct usb_serial_port *port = tty->driver_data;
2127 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2128 int chars = 0;
2129 unsigned long flags;
2130 if (edge_port == NULL)
2131 return 0;
2132
2133 spin_lock_irqsave(&edge_port->ep_lock, flags);
2134 chars = kfifo_len(&port->write_fifo);
2135 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2136
2137 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
2138 return chars;
2139 }
2140
2141 static bool edge_tx_empty(struct usb_serial_port *port)
2142 {
2143 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2144 int ret;
2145
2146 ret = tx_active(edge_port);
2147 if (ret > 0)
2148 return false;
2149
2150 return true;
2151 }
2152
2153 static void edge_throttle(struct tty_struct *tty)
2154 {
2155 struct usb_serial_port *port = tty->driver_data;
2156 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2157 int status;
2158
2159 if (edge_port == NULL)
2160 return;
2161
2162 /* if we are implementing XON/XOFF, send the stop character */
2163 if (I_IXOFF(tty)) {
2164 unsigned char stop_char = STOP_CHAR(tty);
2165 status = edge_write(tty, port, &stop_char, 1);
2166 if (status <= 0) {
2167 dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2168 }
2169 }
2170
2171 /*
2172 * if we are implementing RTS/CTS, stop reads
2173 * and the Edgeport will clear the RTS line
2174 */
2175 if (C_CRTSCTS(tty))
2176 stop_read(edge_port);
2177
2178 }
2179
2180 static void edge_unthrottle(struct tty_struct *tty)
2181 {
2182 struct usb_serial_port *port = tty->driver_data;
2183 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2184 int status;
2185
2186 if (edge_port == NULL)
2187 return;
2188
2189 /* if we are implementing XON/XOFF, send the start character */
2190 if (I_IXOFF(tty)) {
2191 unsigned char start_char = START_CHAR(tty);
2192 status = edge_write(tty, port, &start_char, 1);
2193 if (status <= 0) {
2194 dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2195 }
2196 }
2197 /*
2198 * if we are implementing RTS/CTS, restart reads
2199 * are the Edgeport will assert the RTS line
2200 */
2201 if (C_CRTSCTS(tty)) {
2202 status = restart_read(edge_port);
2203 if (status)
2204 dev_err(&port->dev,
2205 "%s - read bulk usb_submit_urb failed: %d\n",
2206 __func__, status);
2207 }
2208
2209 }
2210
2211 static void stop_read(struct edgeport_port *edge_port)
2212 {
2213 unsigned long flags;
2214
2215 spin_lock_irqsave(&edge_port->ep_lock, flags);
2216
2217 if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2218 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2219 edge_port->shadow_mcr &= ~MCR_RTS;
2220
2221 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2222 }
2223
2224 static int restart_read(struct edgeport_port *edge_port)
2225 {
2226 struct urb *urb;
2227 int status = 0;
2228 unsigned long flags;
2229
2230 spin_lock_irqsave(&edge_port->ep_lock, flags);
2231
2232 if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2233 urb = edge_port->port->read_urb;
2234 status = usb_submit_urb(urb, GFP_ATOMIC);
2235 }
2236 edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2237 edge_port->shadow_mcr |= MCR_RTS;
2238
2239 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2240
2241 return status;
2242 }
2243
2244 static void change_port_settings(struct tty_struct *tty,
2245 struct edgeport_port *edge_port, struct ktermios *old_termios)
2246 {
2247 struct device *dev = &edge_port->port->dev;
2248 struct ump_uart_config *config;
2249 int baud;
2250 unsigned cflag;
2251 int status;
2252 int port_number = edge_port->port->port_number;
2253
2254 config = kmalloc (sizeof (*config), GFP_KERNEL);
2255 if (!config) {
2256 tty->termios = *old_termios;
2257 return;
2258 }
2259
2260 cflag = tty->termios.c_cflag;
2261
2262 config->wFlags = 0;
2263
2264 /* These flags must be set */
2265 config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2266 config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2267 config->bUartMode = (__u8)(edge_port->bUartMode);
2268
2269 switch (cflag & CSIZE) {
2270 case CS5:
2271 config->bDataBits = UMP_UART_CHAR5BITS;
2272 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2273 break;
2274 case CS6:
2275 config->bDataBits = UMP_UART_CHAR6BITS;
2276 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2277 break;
2278 case CS7:
2279 config->bDataBits = UMP_UART_CHAR7BITS;
2280 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2281 break;
2282 default:
2283 case CS8:
2284 config->bDataBits = UMP_UART_CHAR8BITS;
2285 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2286 break;
2287 }
2288
2289 if (cflag & PARENB) {
2290 if (cflag & PARODD) {
2291 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2292 config->bParity = UMP_UART_ODDPARITY;
2293 dev_dbg(dev, "%s - parity = odd\n", __func__);
2294 } else {
2295 config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2296 config->bParity = UMP_UART_EVENPARITY;
2297 dev_dbg(dev, "%s - parity = even\n", __func__);
2298 }
2299 } else {
2300 config->bParity = UMP_UART_NOPARITY;
2301 dev_dbg(dev, "%s - parity = none\n", __func__);
2302 }
2303
2304 if (cflag & CSTOPB) {
2305 config->bStopBits = UMP_UART_STOPBIT2;
2306 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2307 } else {
2308 config->bStopBits = UMP_UART_STOPBIT1;
2309 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2310 }
2311
2312 /* figure out the flow control settings */
2313 if (cflag & CRTSCTS) {
2314 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2315 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2316 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2317 } else {
2318 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2319 restart_read(edge_port);
2320 }
2321
2322 /*
2323 * if we are implementing XON/XOFF, set the start and stop
2324 * character in the device
2325 */
2326 config->cXon = START_CHAR(tty);
2327 config->cXoff = STOP_CHAR(tty);
2328
2329 /* if we are implementing INBOUND XON/XOFF */
2330 if (I_IXOFF(tty)) {
2331 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2332 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2333 __func__, config->cXon, config->cXoff);
2334 } else
2335 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2336
2337 /* if we are implementing OUTBOUND XON/XOFF */
2338 if (I_IXON(tty)) {
2339 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2340 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2341 __func__, config->cXon, config->cXoff);
2342 } else
2343 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2344
2345 tty->termios.c_cflag &= ~CMSPAR;
2346
2347 /* Round the baud rate */
2348 baud = tty_get_baud_rate(tty);
2349 if (!baud) {
2350 /* pick a default, any default... */
2351 baud = 9600;
2352 } else {
2353 /* Avoid a zero divisor. */
2354 baud = min(baud, 461550);
2355 tty_encode_baud_rate(tty, baud, baud);
2356 }
2357
2358 edge_port->baud_rate = baud;
2359 config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2360
2361 /* FIXME: Recompute actual baud from divisor here */
2362
2363 dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate);
2364
2365 dev_dbg(dev, "wBaudRate: %d\n", (int)(461550L / config->wBaudRate));
2366 dev_dbg(dev, "wFlags: 0x%x\n", config->wFlags);
2367 dev_dbg(dev, "bDataBits: %d\n", config->bDataBits);
2368 dev_dbg(dev, "bParity: %d\n", config->bParity);
2369 dev_dbg(dev, "bStopBits: %d\n", config->bStopBits);
2370 dev_dbg(dev, "cXon: %d\n", config->cXon);
2371 dev_dbg(dev, "cXoff: %d\n", config->cXoff);
2372 dev_dbg(dev, "bUartMode: %d\n", config->bUartMode);
2373
2374 /* move the word values into big endian mode */
2375 cpu_to_be16s(&config->wFlags);
2376 cpu_to_be16s(&config->wBaudRate);
2377
2378 status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2379 (__u8)(UMPM_UART1_PORT + port_number),
2380 0, (__u8 *)config, sizeof(*config));
2381 if (status)
2382 dev_dbg(dev, "%s - error %d when trying to write config to device\n",
2383 __func__, status);
2384 kfree(config);
2385 }
2386
2387 static void edge_set_termios(struct tty_struct *tty,
2388 struct usb_serial_port *port, struct ktermios *old_termios)
2389 {
2390 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2391 unsigned int cflag;
2392
2393 cflag = tty->termios.c_cflag;
2394
2395 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2396 tty->termios.c_cflag, tty->termios.c_iflag);
2397 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2398 old_termios->c_cflag, old_termios->c_iflag);
2399
2400 if (edge_port == NULL)
2401 return;
2402 /* change the port settings to the new ones specified */
2403 change_port_settings(tty, edge_port, old_termios);
2404 }
2405
2406 static int edge_tiocmset(struct tty_struct *tty,
2407 unsigned int set, unsigned int clear)
2408 {
2409 struct usb_serial_port *port = tty->driver_data;
2410 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2411 unsigned int mcr;
2412 unsigned long flags;
2413
2414 spin_lock_irqsave(&edge_port->ep_lock, flags);
2415 mcr = edge_port->shadow_mcr;
2416 if (set & TIOCM_RTS)
2417 mcr |= MCR_RTS;
2418 if (set & TIOCM_DTR)
2419 mcr |= MCR_DTR;
2420 if (set & TIOCM_LOOP)
2421 mcr |= MCR_LOOPBACK;
2422
2423 if (clear & TIOCM_RTS)
2424 mcr &= ~MCR_RTS;
2425 if (clear & TIOCM_DTR)
2426 mcr &= ~MCR_DTR;
2427 if (clear & TIOCM_LOOP)
2428 mcr &= ~MCR_LOOPBACK;
2429
2430 edge_port->shadow_mcr = mcr;
2431 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2432
2433 restore_mcr(edge_port, mcr);
2434 return 0;
2435 }
2436
2437 static int edge_tiocmget(struct tty_struct *tty)
2438 {
2439 struct usb_serial_port *port = tty->driver_data;
2440 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2441 unsigned int result = 0;
2442 unsigned int msr;
2443 unsigned int mcr;
2444 unsigned long flags;
2445
2446 spin_lock_irqsave(&edge_port->ep_lock, flags);
2447
2448 msr = edge_port->shadow_msr;
2449 mcr = edge_port->shadow_mcr;
2450 result = ((mcr & MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
2451 | ((mcr & MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
2452 | ((msr & EDGEPORT_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
2453 | ((msr & EDGEPORT_MSR_CD) ? TIOCM_CAR: 0) /* 0x040 */
2454 | ((msr & EDGEPORT_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
2455 | ((msr & EDGEPORT_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
2456
2457
2458 dev_dbg(&port->dev, "%s -- %x\n", __func__, result);
2459 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2460
2461 return result;
2462 }
2463
2464 static int get_serial_info(struct edgeport_port *edge_port,
2465 struct serial_struct __user *retinfo)
2466 {
2467 struct serial_struct tmp;
2468 unsigned cwait;
2469
2470 cwait = edge_port->port->port.closing_wait;
2471 if (cwait != ASYNC_CLOSING_WAIT_NONE)
2472 cwait = jiffies_to_msecs(cwait) / 10;
2473
2474 memset(&tmp, 0, sizeof(tmp));
2475
2476 tmp.type = PORT_16550A;
2477 tmp.line = edge_port->port->minor;
2478 tmp.port = edge_port->port->port_number;
2479 tmp.irq = 0;
2480 tmp.xmit_fifo_size = edge_port->port->bulk_out_size;
2481 tmp.baud_base = 9600;
2482 tmp.close_delay = 5*HZ;
2483 tmp.closing_wait = cwait;
2484
2485 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2486 return -EFAULT;
2487 return 0;
2488 }
2489
2490 static int edge_ioctl(struct tty_struct *tty,
2491 unsigned int cmd, unsigned long arg)
2492 {
2493 struct usb_serial_port *port = tty->driver_data;
2494 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2495
2496 switch (cmd) {
2497 case TIOCGSERIAL:
2498 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
2499 return get_serial_info(edge_port,
2500 (struct serial_struct __user *) arg);
2501 }
2502 return -ENOIOCTLCMD;
2503 }
2504
2505 static void edge_break(struct tty_struct *tty, int break_state)
2506 {
2507 struct usb_serial_port *port = tty->driver_data;
2508 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2509 int status;
2510 int bv = 0; /* Off */
2511
2512 if (break_state == -1)
2513 bv = 1; /* On */
2514 status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2515 if (status)
2516 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n",
2517 __func__, status);
2518 }
2519
2520 static void edge_heartbeat_schedule(struct edgeport_serial *edge_serial)
2521 {
2522 if (!edge_serial->use_heartbeat)
2523 return;
2524
2525 schedule_delayed_work(&edge_serial->heartbeat_work,
2526 FW_HEARTBEAT_SECS * HZ);
2527 }
2528
2529 static void edge_heartbeat_work(struct work_struct *work)
2530 {
2531 struct edgeport_serial *serial;
2532 struct ti_i2c_desc *rom_desc;
2533
2534 serial = container_of(work, struct edgeport_serial,
2535 heartbeat_work.work);
2536
2537 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
2538
2539 /* Descriptor address request is enough to reset the firmware timer */
2540 if (!rom_desc || !get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
2541 rom_desc)) {
2542 dev_err(&serial->serial->interface->dev,
2543 "%s - Incomplete heartbeat\n", __func__);
2544 }
2545 kfree(rom_desc);
2546
2547 edge_heartbeat_schedule(serial);
2548 }
2549
2550 static int edge_startup(struct usb_serial *serial)
2551 {
2552 struct edgeport_serial *edge_serial;
2553 int status;
2554 u16 product_id;
2555
2556 /* Make sure we have the required endpoints when in download mode. */
2557 if (serial->interface->cur_altsetting->desc.bNumEndpoints > 1) {
2558 if (serial->num_bulk_in < serial->num_ports ||
2559 serial->num_bulk_out < serial->num_ports)
2560 return -ENODEV;
2561 }
2562
2563 /* create our private serial structure */
2564 edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2565 if (!edge_serial)
2566 return -ENOMEM;
2567
2568 mutex_init(&edge_serial->es_lock);
2569 edge_serial->serial = serial;
2570 INIT_DELAYED_WORK(&edge_serial->heartbeat_work, edge_heartbeat_work);
2571 usb_set_serial_data(serial, edge_serial);
2572
2573 status = download_fw(edge_serial);
2574 if (status < 0) {
2575 kfree(edge_serial);
2576 return status;
2577 }
2578
2579 if (status > 0)
2580 return 1; /* bind but do not register any ports */
2581
2582 product_id = le16_to_cpu(
2583 edge_serial->serial->dev->descriptor.idProduct);
2584
2585 /* Currently only the EP/416 models require heartbeat support */
2586 if (edge_serial->fw_version > FW_HEARTBEAT_VERSION_CUTOFF) {
2587 if (product_id == ION_DEVICE_ID_TI_EDGEPORT_416 ||
2588 product_id == ION_DEVICE_ID_TI_EDGEPORT_416B) {
2589 edge_serial->use_heartbeat = true;
2590 }
2591 }
2592
2593 edge_heartbeat_schedule(edge_serial);
2594
2595 return 0;
2596 }
2597
2598 static void edge_disconnect(struct usb_serial *serial)
2599 {
2600 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2601
2602 cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2603 }
2604
2605 static void edge_release(struct usb_serial *serial)
2606 {
2607 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2608
2609 cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2610 kfree(edge_serial);
2611 }
2612
2613 static int edge_port_probe(struct usb_serial_port *port)
2614 {
2615 struct edgeport_port *edge_port;
2616 int ret;
2617
2618 edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2619 if (!edge_port)
2620 return -ENOMEM;
2621
2622 spin_lock_init(&edge_port->ep_lock);
2623 edge_port->port = port;
2624 edge_port->edge_serial = usb_get_serial_data(port->serial);
2625 edge_port->bUartMode = default_uart_mode;
2626
2627 switch (port->port_number) {
2628 case 0:
2629 edge_port->uart_base = UMPMEM_BASE_UART1;
2630 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
2631 break;
2632 case 1:
2633 edge_port->uart_base = UMPMEM_BASE_UART2;
2634 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
2635 break;
2636 default:
2637 dev_err(&port->dev, "unknown port number\n");
2638 ret = -ENODEV;
2639 goto err;
2640 }
2641
2642 dev_dbg(&port->dev,
2643 "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n",
2644 __func__, port->port_number, edge_port->uart_base,
2645 edge_port->dma_address);
2646
2647 usb_set_serial_port_data(port, edge_port);
2648
2649 ret = edge_create_sysfs_attrs(port);
2650 if (ret)
2651 goto err;
2652
2653 port->port.closing_wait = msecs_to_jiffies(closing_wait * 10);
2654 port->port.drain_delay = 1;
2655
2656 return 0;
2657 err:
2658 kfree(edge_port);
2659
2660 return ret;
2661 }
2662
2663 static int edge_port_remove(struct usb_serial_port *port)
2664 {
2665 struct edgeport_port *edge_port;
2666
2667 edge_port = usb_get_serial_port_data(port);
2668 edge_remove_sysfs_attrs(port);
2669 kfree(edge_port);
2670
2671 return 0;
2672 }
2673
2674 /* Sysfs Attributes */
2675
2676 static ssize_t uart_mode_show(struct device *dev,
2677 struct device_attribute *attr, char *buf)
2678 {
2679 struct usb_serial_port *port = to_usb_serial_port(dev);
2680 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2681
2682 return sprintf(buf, "%d\n", edge_port->bUartMode);
2683 }
2684
2685 static ssize_t uart_mode_store(struct device *dev,
2686 struct device_attribute *attr, const char *valbuf, size_t count)
2687 {
2688 struct usb_serial_port *port = to_usb_serial_port(dev);
2689 struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2690 unsigned int v = simple_strtoul(valbuf, NULL, 0);
2691
2692 dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v);
2693
2694 if (v < 256)
2695 edge_port->bUartMode = v;
2696 else
2697 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2698
2699 return count;
2700 }
2701 static DEVICE_ATTR_RW(uart_mode);
2702
2703 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2704 {
2705 return device_create_file(&port->dev, &dev_attr_uart_mode);
2706 }
2707
2708 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2709 {
2710 device_remove_file(&port->dev, &dev_attr_uart_mode);
2711 return 0;
2712 }
2713
2714 #ifdef CONFIG_PM
2715 static int edge_suspend(struct usb_serial *serial, pm_message_t message)
2716 {
2717 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2718
2719 cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2720
2721 return 0;
2722 }
2723
2724 static int edge_resume(struct usb_serial *serial)
2725 {
2726 struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2727
2728 edge_heartbeat_schedule(edge_serial);
2729
2730 return 0;
2731 }
2732 #endif
2733
2734 static struct usb_serial_driver edgeport_1port_device = {
2735 .driver = {
2736 .owner = THIS_MODULE,
2737 .name = "edgeport_ti_1",
2738 },
2739 .description = "Edgeport TI 1 port adapter",
2740 .id_table = edgeport_1port_id_table,
2741 .num_ports = 1,
2742 .open = edge_open,
2743 .close = edge_close,
2744 .throttle = edge_throttle,
2745 .unthrottle = edge_unthrottle,
2746 .attach = edge_startup,
2747 .disconnect = edge_disconnect,
2748 .release = edge_release,
2749 .port_probe = edge_port_probe,
2750 .port_remove = edge_port_remove,
2751 .ioctl = edge_ioctl,
2752 .set_termios = edge_set_termios,
2753 .tiocmget = edge_tiocmget,
2754 .tiocmset = edge_tiocmset,
2755 .tiocmiwait = usb_serial_generic_tiocmiwait,
2756 .get_icount = usb_serial_generic_get_icount,
2757 .write = edge_write,
2758 .write_room = edge_write_room,
2759 .chars_in_buffer = edge_chars_in_buffer,
2760 .tx_empty = edge_tx_empty,
2761 .break_ctl = edge_break,
2762 .read_int_callback = edge_interrupt_callback,
2763 .read_bulk_callback = edge_bulk_in_callback,
2764 .write_bulk_callback = edge_bulk_out_callback,
2765 #ifdef CONFIG_PM
2766 .suspend = edge_suspend,
2767 .resume = edge_resume,
2768 #endif
2769 };
2770
2771 static struct usb_serial_driver edgeport_2port_device = {
2772 .driver = {
2773 .owner = THIS_MODULE,
2774 .name = "edgeport_ti_2",
2775 },
2776 .description = "Edgeport TI 2 port adapter",
2777 .id_table = edgeport_2port_id_table,
2778 .num_ports = 2,
2779 .open = edge_open,
2780 .close = edge_close,
2781 .throttle = edge_throttle,
2782 .unthrottle = edge_unthrottle,
2783 .attach = edge_startup,
2784 .disconnect = edge_disconnect,
2785 .release = edge_release,
2786 .port_probe = edge_port_probe,
2787 .port_remove = edge_port_remove,
2788 .ioctl = edge_ioctl,
2789 .set_termios = edge_set_termios,
2790 .tiocmget = edge_tiocmget,
2791 .tiocmset = edge_tiocmset,
2792 .tiocmiwait = usb_serial_generic_tiocmiwait,
2793 .get_icount = usb_serial_generic_get_icount,
2794 .write = edge_write,
2795 .write_room = edge_write_room,
2796 .chars_in_buffer = edge_chars_in_buffer,
2797 .tx_empty = edge_tx_empty,
2798 .break_ctl = edge_break,
2799 .read_int_callback = edge_interrupt_callback,
2800 .read_bulk_callback = edge_bulk_in_callback,
2801 .write_bulk_callback = edge_bulk_out_callback,
2802 #ifdef CONFIG_PM
2803 .suspend = edge_suspend,
2804 .resume = edge_resume,
2805 #endif
2806 };
2807
2808 static struct usb_serial_driver * const serial_drivers[] = {
2809 &edgeport_1port_device, &edgeport_2port_device, NULL
2810 };
2811
2812 module_usb_serial_driver(serial_drivers, id_table_combined);
2813
2814 MODULE_AUTHOR(DRIVER_AUTHOR);
2815 MODULE_DESCRIPTION(DRIVER_DESC);
2816 MODULE_LICENSE("GPL");
2817 MODULE_FIRMWARE("edgeport/down3.bin");
2818
2819 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2820 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2821
2822 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2823 MODULE_PARM_DESC(ignore_cpu_rev,
2824 "Ignore the cpu revision when connecting to a device");
2825
2826 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
2827 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
Ubuntu Artful kernel mirror