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628329d5 DT |
1 | /* |
2 | * Driver for IMS Passenger Control Unit Devices | |
3 | * | |
4 | * Copyright (C) 2013 The IMS Company | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 | |
8 | * as published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/completion.h> | |
12 | #include <linux/device.h> | |
13 | #include <linux/firmware.h> | |
14 | #include <linux/ihex.h> | |
15 | #include <linux/input.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/leds.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/types.h> | |
21 | #include <linux/usb/input.h> | |
22 | #include <linux/usb/cdc.h> | |
23 | #include <asm/unaligned.h> | |
24 | ||
25 | #define IMS_PCU_KEYMAP_LEN 32 | |
26 | ||
27 | struct ims_pcu_buttons { | |
28 | struct input_dev *input; | |
29 | char name[32]; | |
30 | char phys[32]; | |
31 | unsigned short keymap[IMS_PCU_KEYMAP_LEN]; | |
32 | }; | |
33 | ||
34 | struct ims_pcu_gamepad { | |
35 | struct input_dev *input; | |
36 | char name[32]; | |
37 | char phys[32]; | |
38 | }; | |
39 | ||
40 | struct ims_pcu_backlight { | |
41 | struct led_classdev cdev; | |
42 | struct work_struct work; | |
43 | enum led_brightness desired_brightness; | |
44 | char name[32]; | |
45 | }; | |
46 | ||
47 | #define IMS_PCU_PART_NUMBER_LEN 15 | |
48 | #define IMS_PCU_SERIAL_NUMBER_LEN 8 | |
49 | #define IMS_PCU_DOM_LEN 8 | |
50 | #define IMS_PCU_FW_VERSION_LEN (9 + 1) | |
51 | #define IMS_PCU_BL_VERSION_LEN (9 + 1) | |
52 | #define IMS_PCU_BL_RESET_REASON_LEN (2 + 1) | |
53 | ||
e5fcd269 AS |
54 | #define IMS_PCU_PCU_B_DEVICE_ID 5 |
55 | ||
628329d5 DT |
56 | #define IMS_PCU_BUF_SIZE 128 |
57 | ||
58 | struct ims_pcu { | |
59 | struct usb_device *udev; | |
60 | struct device *dev; /* control interface's device, used for logging */ | |
61 | ||
62 | unsigned int device_no; | |
63 | ||
64 | bool bootloader_mode; | |
65 | ||
66 | char part_number[IMS_PCU_PART_NUMBER_LEN]; | |
67 | char serial_number[IMS_PCU_SERIAL_NUMBER_LEN]; | |
68 | char date_of_manufacturing[IMS_PCU_DOM_LEN]; | |
69 | char fw_version[IMS_PCU_FW_VERSION_LEN]; | |
70 | char bl_version[IMS_PCU_BL_VERSION_LEN]; | |
71 | char reset_reason[IMS_PCU_BL_RESET_REASON_LEN]; | |
72 | int update_firmware_status; | |
e5fcd269 AS |
73 | u8 device_id; |
74 | ||
75 | u8 ofn_reg_addr; | |
628329d5 DT |
76 | |
77 | struct usb_interface *ctrl_intf; | |
78 | ||
79 | struct usb_endpoint_descriptor *ep_ctrl; | |
80 | struct urb *urb_ctrl; | |
81 | u8 *urb_ctrl_buf; | |
82 | dma_addr_t ctrl_dma; | |
83 | size_t max_ctrl_size; | |
84 | ||
85 | struct usb_interface *data_intf; | |
86 | ||
87 | struct usb_endpoint_descriptor *ep_in; | |
88 | struct urb *urb_in; | |
89 | u8 *urb_in_buf; | |
90 | dma_addr_t read_dma; | |
91 | size_t max_in_size; | |
92 | ||
93 | struct usb_endpoint_descriptor *ep_out; | |
94 | u8 *urb_out_buf; | |
95 | size_t max_out_size; | |
96 | ||
97 | u8 read_buf[IMS_PCU_BUF_SIZE]; | |
98 | u8 read_pos; | |
99 | u8 check_sum; | |
100 | bool have_stx; | |
101 | bool have_dle; | |
102 | ||
103 | u8 cmd_buf[IMS_PCU_BUF_SIZE]; | |
104 | u8 ack_id; | |
105 | u8 expected_response; | |
106 | u8 cmd_buf_len; | |
107 | struct completion cmd_done; | |
108 | struct mutex cmd_mutex; | |
109 | ||
110 | u32 fw_start_addr; | |
111 | u32 fw_end_addr; | |
112 | struct completion async_firmware_done; | |
113 | ||
114 | struct ims_pcu_buttons buttons; | |
115 | struct ims_pcu_gamepad *gamepad; | |
116 | struct ims_pcu_backlight backlight; | |
117 | ||
118 | bool setup_complete; /* Input and LED devices have been created */ | |
119 | }; | |
120 | ||
121 | ||
122 | /********************************************************************* | |
123 | * Buttons Input device support * | |
124 | *********************************************************************/ | |
125 | ||
126 | static const unsigned short ims_pcu_keymap_1[] = { | |
127 | [1] = KEY_ATTENDANT_OFF, | |
128 | [2] = KEY_ATTENDANT_ON, | |
129 | [3] = KEY_LIGHTS_TOGGLE, | |
130 | [4] = KEY_VOLUMEUP, | |
131 | [5] = KEY_VOLUMEDOWN, | |
132 | [6] = KEY_INFO, | |
133 | }; | |
134 | ||
135 | static const unsigned short ims_pcu_keymap_2[] = { | |
136 | [4] = KEY_VOLUMEUP, | |
137 | [5] = KEY_VOLUMEDOWN, | |
138 | [6] = KEY_INFO, | |
139 | }; | |
140 | ||
141 | static const unsigned short ims_pcu_keymap_3[] = { | |
142 | [1] = KEY_HOMEPAGE, | |
143 | [2] = KEY_ATTENDANT_TOGGLE, | |
144 | [3] = KEY_LIGHTS_TOGGLE, | |
145 | [4] = KEY_VOLUMEUP, | |
146 | [5] = KEY_VOLUMEDOWN, | |
147 | [6] = KEY_DISPLAYTOGGLE, | |
148 | [18] = KEY_PLAYPAUSE, | |
149 | }; | |
150 | ||
151 | static const unsigned short ims_pcu_keymap_4[] = { | |
152 | [1] = KEY_ATTENDANT_OFF, | |
153 | [2] = KEY_ATTENDANT_ON, | |
154 | [3] = KEY_LIGHTS_TOGGLE, | |
155 | [4] = KEY_VOLUMEUP, | |
156 | [5] = KEY_VOLUMEDOWN, | |
157 | [6] = KEY_INFO, | |
158 | [18] = KEY_PLAYPAUSE, | |
159 | }; | |
160 | ||
161 | static const unsigned short ims_pcu_keymap_5[] = { | |
162 | [1] = KEY_ATTENDANT_OFF, | |
163 | [2] = KEY_ATTENDANT_ON, | |
164 | [3] = KEY_LIGHTS_TOGGLE, | |
165 | }; | |
166 | ||
167 | struct ims_pcu_device_info { | |
168 | const unsigned short *keymap; | |
169 | size_t keymap_len; | |
170 | bool has_gamepad; | |
171 | }; | |
172 | ||
173 | #define IMS_PCU_DEVINFO(_n, _gamepad) \ | |
174 | [_n] = { \ | |
175 | .keymap = ims_pcu_keymap_##_n, \ | |
176 | .keymap_len = ARRAY_SIZE(ims_pcu_keymap_##_n), \ | |
177 | .has_gamepad = _gamepad, \ | |
178 | } | |
179 | ||
180 | static const struct ims_pcu_device_info ims_pcu_device_info[] = { | |
181 | IMS_PCU_DEVINFO(1, true), | |
182 | IMS_PCU_DEVINFO(2, true), | |
183 | IMS_PCU_DEVINFO(3, true), | |
184 | IMS_PCU_DEVINFO(4, true), | |
185 | IMS_PCU_DEVINFO(5, false), | |
186 | }; | |
187 | ||
188 | static void ims_pcu_buttons_report(struct ims_pcu *pcu, u32 data) | |
189 | { | |
190 | struct ims_pcu_buttons *buttons = &pcu->buttons; | |
191 | struct input_dev *input = buttons->input; | |
192 | int i; | |
193 | ||
194 | for (i = 0; i < 32; i++) { | |
195 | unsigned short keycode = buttons->keymap[i]; | |
196 | ||
197 | if (keycode != KEY_RESERVED) | |
198 | input_report_key(input, keycode, data & (1UL << i)); | |
199 | } | |
200 | ||
201 | input_sync(input); | |
202 | } | |
203 | ||
204 | static int ims_pcu_setup_buttons(struct ims_pcu *pcu, | |
205 | const unsigned short *keymap, | |
206 | size_t keymap_len) | |
207 | { | |
208 | struct ims_pcu_buttons *buttons = &pcu->buttons; | |
209 | struct input_dev *input; | |
210 | int i; | |
211 | int error; | |
212 | ||
213 | input = input_allocate_device(); | |
214 | if (!input) { | |
215 | dev_err(pcu->dev, | |
216 | "Not enough memory for input input device\n"); | |
217 | return -ENOMEM; | |
218 | } | |
219 | ||
220 | snprintf(buttons->name, sizeof(buttons->name), | |
221 | "IMS PCU#%d Button Interface", pcu->device_no); | |
222 | ||
223 | usb_make_path(pcu->udev, buttons->phys, sizeof(buttons->phys)); | |
224 | strlcat(buttons->phys, "/input0", sizeof(buttons->phys)); | |
225 | ||
226 | memcpy(buttons->keymap, keymap, sizeof(*keymap) * keymap_len); | |
227 | ||
228 | input->name = buttons->name; | |
229 | input->phys = buttons->phys; | |
230 | usb_to_input_id(pcu->udev, &input->id); | |
231 | input->dev.parent = &pcu->ctrl_intf->dev; | |
232 | ||
233 | input->keycode = buttons->keymap; | |
234 | input->keycodemax = ARRAY_SIZE(buttons->keymap); | |
235 | input->keycodesize = sizeof(buttons->keymap[0]); | |
236 | ||
237 | __set_bit(EV_KEY, input->evbit); | |
238 | for (i = 0; i < IMS_PCU_KEYMAP_LEN; i++) | |
239 | __set_bit(buttons->keymap[i], input->keybit); | |
240 | __clear_bit(KEY_RESERVED, input->keybit); | |
241 | ||
242 | error = input_register_device(input); | |
243 | if (error) { | |
244 | dev_err(pcu->dev, | |
245 | "Failed to register buttons input device: %d\n", | |
246 | error); | |
247 | input_free_device(input); | |
248 | return error; | |
249 | } | |
250 | ||
251 | buttons->input = input; | |
252 | return 0; | |
253 | } | |
254 | ||
255 | static void ims_pcu_destroy_buttons(struct ims_pcu *pcu) | |
256 | { | |
257 | struct ims_pcu_buttons *buttons = &pcu->buttons; | |
258 | ||
259 | input_unregister_device(buttons->input); | |
260 | } | |
261 | ||
262 | ||
263 | /********************************************************************* | |
264 | * Gamepad Input device support * | |
265 | *********************************************************************/ | |
266 | ||
267 | static void ims_pcu_gamepad_report(struct ims_pcu *pcu, u32 data) | |
268 | { | |
269 | struct ims_pcu_gamepad *gamepad = pcu->gamepad; | |
270 | struct input_dev *input = gamepad->input; | |
271 | int x, y; | |
272 | ||
273 | x = !!(data & (1 << 14)) - !!(data & (1 << 13)); | |
274 | y = !!(data & (1 << 12)) - !!(data & (1 << 11)); | |
275 | ||
276 | input_report_abs(input, ABS_X, x); | |
277 | input_report_abs(input, ABS_Y, y); | |
278 | ||
279 | input_report_key(input, BTN_A, data & (1 << 7)); | |
280 | input_report_key(input, BTN_B, data & (1 << 8)); | |
281 | input_report_key(input, BTN_X, data & (1 << 9)); | |
282 | input_report_key(input, BTN_Y, data & (1 << 10)); | |
283 | input_report_key(input, BTN_START, data & (1 << 15)); | |
284 | input_report_key(input, BTN_SELECT, data & (1 << 16)); | |
285 | ||
286 | input_sync(input); | |
287 | } | |
288 | ||
289 | static int ims_pcu_setup_gamepad(struct ims_pcu *pcu) | |
290 | { | |
291 | struct ims_pcu_gamepad *gamepad; | |
292 | struct input_dev *input; | |
293 | int error; | |
294 | ||
295 | gamepad = kzalloc(sizeof(struct ims_pcu_gamepad), GFP_KERNEL); | |
296 | input = input_allocate_device(); | |
297 | if (!gamepad || !input) { | |
298 | dev_err(pcu->dev, | |
299 | "Not enough memory for gamepad device\n"); | |
3c2b9010 DT |
300 | error = -ENOMEM; |
301 | goto err_free_mem; | |
628329d5 DT |
302 | } |
303 | ||
304 | gamepad->input = input; | |
305 | ||
306 | snprintf(gamepad->name, sizeof(gamepad->name), | |
307 | "IMS PCU#%d Gamepad Interface", pcu->device_no); | |
308 | ||
309 | usb_make_path(pcu->udev, gamepad->phys, sizeof(gamepad->phys)); | |
310 | strlcat(gamepad->phys, "/input1", sizeof(gamepad->phys)); | |
311 | ||
312 | input->name = gamepad->name; | |
313 | input->phys = gamepad->phys; | |
314 | usb_to_input_id(pcu->udev, &input->id); | |
315 | input->dev.parent = &pcu->ctrl_intf->dev; | |
316 | ||
317 | __set_bit(EV_KEY, input->evbit); | |
318 | __set_bit(BTN_A, input->keybit); | |
319 | __set_bit(BTN_B, input->keybit); | |
320 | __set_bit(BTN_X, input->keybit); | |
321 | __set_bit(BTN_Y, input->keybit); | |
322 | __set_bit(BTN_START, input->keybit); | |
323 | __set_bit(BTN_SELECT, input->keybit); | |
324 | ||
325 | __set_bit(EV_ABS, input->evbit); | |
326 | input_set_abs_params(input, ABS_X, -1, 1, 0, 0); | |
327 | input_set_abs_params(input, ABS_Y, -1, 1, 0, 0); | |
328 | ||
329 | error = input_register_device(input); | |
330 | if (error) { | |
331 | dev_err(pcu->dev, | |
332 | "Failed to register gamepad input device: %d\n", | |
333 | error); | |
334 | goto err_free_mem; | |
335 | } | |
336 | ||
337 | pcu->gamepad = gamepad; | |
338 | return 0; | |
339 | ||
340 | err_free_mem: | |
341 | input_free_device(input); | |
342 | kfree(gamepad); | |
343 | return -ENOMEM; | |
344 | } | |
345 | ||
346 | static void ims_pcu_destroy_gamepad(struct ims_pcu *pcu) | |
347 | { | |
348 | struct ims_pcu_gamepad *gamepad = pcu->gamepad; | |
349 | ||
350 | input_unregister_device(gamepad->input); | |
351 | kfree(gamepad); | |
352 | } | |
353 | ||
354 | ||
355 | /********************************************************************* | |
356 | * PCU Communication protocol handling * | |
357 | *********************************************************************/ | |
358 | ||
359 | #define IMS_PCU_PROTOCOL_STX 0x02 | |
360 | #define IMS_PCU_PROTOCOL_ETX 0x03 | |
361 | #define IMS_PCU_PROTOCOL_DLE 0x10 | |
362 | ||
363 | /* PCU commands */ | |
364 | #define IMS_PCU_CMD_STATUS 0xa0 | |
365 | #define IMS_PCU_CMD_PCU_RESET 0xa1 | |
366 | #define IMS_PCU_CMD_RESET_REASON 0xa2 | |
367 | #define IMS_PCU_CMD_SEND_BUTTONS 0xa3 | |
368 | #define IMS_PCU_CMD_JUMP_TO_BTLDR 0xa4 | |
369 | #define IMS_PCU_CMD_GET_INFO 0xa5 | |
370 | #define IMS_PCU_CMD_SET_BRIGHTNESS 0xa6 | |
371 | #define IMS_PCU_CMD_EEPROM 0xa7 | |
372 | #define IMS_PCU_CMD_GET_FW_VERSION 0xa8 | |
373 | #define IMS_PCU_CMD_GET_BL_VERSION 0xa9 | |
374 | #define IMS_PCU_CMD_SET_INFO 0xab | |
375 | #define IMS_PCU_CMD_GET_BRIGHTNESS 0xac | |
376 | #define IMS_PCU_CMD_GET_DEVICE_ID 0xae | |
377 | #define IMS_PCU_CMD_SPECIAL_INFO 0xb0 | |
378 | #define IMS_PCU_CMD_BOOTLOADER 0xb1 /* Pass data to bootloader */ | |
e5fcd269 AS |
379 | #define IMS_PCU_CMD_OFN_SET_CONFIG 0xb3 |
380 | #define IMS_PCU_CMD_OFN_GET_CONFIG 0xb4 | |
628329d5 DT |
381 | |
382 | /* PCU responses */ | |
383 | #define IMS_PCU_RSP_STATUS 0xc0 | |
384 | #define IMS_PCU_RSP_PCU_RESET 0 /* Originally 0xc1 */ | |
385 | #define IMS_PCU_RSP_RESET_REASON 0xc2 | |
386 | #define IMS_PCU_RSP_SEND_BUTTONS 0xc3 | |
387 | #define IMS_PCU_RSP_JUMP_TO_BTLDR 0 /* Originally 0xc4 */ | |
388 | #define IMS_PCU_RSP_GET_INFO 0xc5 | |
389 | #define IMS_PCU_RSP_SET_BRIGHTNESS 0xc6 | |
390 | #define IMS_PCU_RSP_EEPROM 0xc7 | |
391 | #define IMS_PCU_RSP_GET_FW_VERSION 0xc8 | |
392 | #define IMS_PCU_RSP_GET_BL_VERSION 0xc9 | |
393 | #define IMS_PCU_RSP_SET_INFO 0xcb | |
394 | #define IMS_PCU_RSP_GET_BRIGHTNESS 0xcc | |
395 | #define IMS_PCU_RSP_CMD_INVALID 0xcd | |
396 | #define IMS_PCU_RSP_GET_DEVICE_ID 0xce | |
397 | #define IMS_PCU_RSP_SPECIAL_INFO 0xd0 | |
398 | #define IMS_PCU_RSP_BOOTLOADER 0xd1 /* Bootloader response */ | |
e5fcd269 AS |
399 | #define IMS_PCU_RSP_OFN_SET_CONFIG 0xd2 |
400 | #define IMS_PCU_RSP_OFN_GET_CONFIG 0xd3 | |
401 | ||
628329d5 DT |
402 | |
403 | #define IMS_PCU_RSP_EVNT_BUTTONS 0xe0 /* Unsolicited, button state */ | |
404 | #define IMS_PCU_GAMEPAD_MASK 0x0001ff80UL /* Bits 7 through 16 */ | |
405 | ||
406 | ||
407 | #define IMS_PCU_MIN_PACKET_LEN 3 | |
408 | #define IMS_PCU_DATA_OFFSET 2 | |
409 | ||
410 | #define IMS_PCU_CMD_WRITE_TIMEOUT 100 /* msec */ | |
411 | #define IMS_PCU_CMD_RESPONSE_TIMEOUT 500 /* msec */ | |
412 | ||
413 | static void ims_pcu_report_events(struct ims_pcu *pcu) | |
414 | { | |
415 | u32 data = get_unaligned_be32(&pcu->read_buf[3]); | |
416 | ||
417 | ims_pcu_buttons_report(pcu, data & ~IMS_PCU_GAMEPAD_MASK); | |
418 | if (pcu->gamepad) | |
419 | ims_pcu_gamepad_report(pcu, data); | |
420 | } | |
421 | ||
422 | static void ims_pcu_handle_response(struct ims_pcu *pcu) | |
423 | { | |
424 | switch (pcu->read_buf[0]) { | |
425 | case IMS_PCU_RSP_EVNT_BUTTONS: | |
426 | if (likely(pcu->setup_complete)) | |
427 | ims_pcu_report_events(pcu); | |
428 | break; | |
429 | ||
430 | default: | |
431 | /* | |
432 | * See if we got command completion. | |
433 | * If both the sequence and response code match save | |
434 | * the data and signal completion. | |
435 | */ | |
436 | if (pcu->read_buf[0] == pcu->expected_response && | |
437 | pcu->read_buf[1] == pcu->ack_id - 1) { | |
438 | ||
439 | memcpy(pcu->cmd_buf, pcu->read_buf, pcu->read_pos); | |
440 | pcu->cmd_buf_len = pcu->read_pos; | |
441 | complete(&pcu->cmd_done); | |
442 | } | |
443 | break; | |
444 | } | |
445 | } | |
446 | ||
447 | static void ims_pcu_process_data(struct ims_pcu *pcu, struct urb *urb) | |
448 | { | |
449 | int i; | |
450 | ||
451 | for (i = 0; i < urb->actual_length; i++) { | |
452 | u8 data = pcu->urb_in_buf[i]; | |
453 | ||
454 | /* Skip everything until we get Start Xmit */ | |
455 | if (!pcu->have_stx && data != IMS_PCU_PROTOCOL_STX) | |
456 | continue; | |
457 | ||
458 | if (pcu->have_dle) { | |
459 | pcu->have_dle = false; | |
460 | pcu->read_buf[pcu->read_pos++] = data; | |
461 | pcu->check_sum += data; | |
462 | continue; | |
463 | } | |
464 | ||
465 | switch (data) { | |
466 | case IMS_PCU_PROTOCOL_STX: | |
467 | if (pcu->have_stx) | |
468 | dev_warn(pcu->dev, | |
469 | "Unexpected STX at byte %d, discarding old data\n", | |
470 | pcu->read_pos); | |
471 | pcu->have_stx = true; | |
472 | pcu->have_dle = false; | |
473 | pcu->read_pos = 0; | |
474 | pcu->check_sum = 0; | |
475 | break; | |
476 | ||
477 | case IMS_PCU_PROTOCOL_DLE: | |
478 | pcu->have_dle = true; | |
479 | break; | |
480 | ||
481 | case IMS_PCU_PROTOCOL_ETX: | |
482 | if (pcu->read_pos < IMS_PCU_MIN_PACKET_LEN) { | |
483 | dev_warn(pcu->dev, | |
484 | "Short packet received (%d bytes), ignoring\n", | |
485 | pcu->read_pos); | |
486 | } else if (pcu->check_sum != 0) { | |
487 | dev_warn(pcu->dev, | |
488 | "Invalid checksum in packet (%d bytes), ignoring\n", | |
489 | pcu->read_pos); | |
490 | } else { | |
491 | ims_pcu_handle_response(pcu); | |
492 | } | |
493 | ||
494 | pcu->have_stx = false; | |
495 | pcu->have_dle = false; | |
496 | pcu->read_pos = 0; | |
497 | break; | |
498 | ||
499 | default: | |
500 | pcu->read_buf[pcu->read_pos++] = data; | |
501 | pcu->check_sum += data; | |
502 | break; | |
503 | } | |
504 | } | |
505 | } | |
506 | ||
507 | static bool ims_pcu_byte_needs_escape(u8 byte) | |
508 | { | |
509 | return byte == IMS_PCU_PROTOCOL_STX || | |
510 | byte == IMS_PCU_PROTOCOL_ETX || | |
511 | byte == IMS_PCU_PROTOCOL_DLE; | |
512 | } | |
513 | ||
514 | static int ims_pcu_send_cmd_chunk(struct ims_pcu *pcu, | |
515 | u8 command, int chunk, int len) | |
516 | { | |
517 | int error; | |
518 | ||
519 | error = usb_bulk_msg(pcu->udev, | |
520 | usb_sndbulkpipe(pcu->udev, | |
521 | pcu->ep_out->bEndpointAddress), | |
522 | pcu->urb_out_buf, len, | |
523 | NULL, IMS_PCU_CMD_WRITE_TIMEOUT); | |
524 | if (error < 0) { | |
525 | dev_dbg(pcu->dev, | |
526 | "Sending 0x%02x command failed at chunk %d: %d\n", | |
527 | command, chunk, error); | |
528 | return error; | |
529 | } | |
530 | ||
531 | return 0; | |
532 | } | |
533 | ||
534 | static int ims_pcu_send_command(struct ims_pcu *pcu, | |
535 | u8 command, const u8 *data, int len) | |
536 | { | |
537 | int count = 0; | |
538 | int chunk = 0; | |
539 | int delta; | |
540 | int i; | |
541 | int error; | |
542 | u8 csum = 0; | |
543 | u8 ack_id; | |
544 | ||
545 | pcu->urb_out_buf[count++] = IMS_PCU_PROTOCOL_STX; | |
546 | ||
547 | /* We know the command need not be escaped */ | |
548 | pcu->urb_out_buf[count++] = command; | |
549 | csum += command; | |
550 | ||
551 | ack_id = pcu->ack_id++; | |
552 | if (ack_id == 0xff) | |
553 | ack_id = pcu->ack_id++; | |
554 | ||
555 | if (ims_pcu_byte_needs_escape(ack_id)) | |
556 | pcu->urb_out_buf[count++] = IMS_PCU_PROTOCOL_DLE; | |
557 | ||
558 | pcu->urb_out_buf[count++] = ack_id; | |
559 | csum += ack_id; | |
560 | ||
561 | for (i = 0; i < len; i++) { | |
562 | ||
563 | delta = ims_pcu_byte_needs_escape(data[i]) ? 2 : 1; | |
564 | if (count + delta >= pcu->max_out_size) { | |
565 | error = ims_pcu_send_cmd_chunk(pcu, command, | |
566 | ++chunk, count); | |
567 | if (error) | |
568 | return error; | |
569 | ||
570 | count = 0; | |
571 | } | |
572 | ||
573 | if (delta == 2) | |
574 | pcu->urb_out_buf[count++] = IMS_PCU_PROTOCOL_DLE; | |
575 | ||
576 | pcu->urb_out_buf[count++] = data[i]; | |
577 | csum += data[i]; | |
578 | } | |
579 | ||
580 | csum = 1 + ~csum; | |
581 | ||
582 | delta = ims_pcu_byte_needs_escape(csum) ? 3 : 2; | |
583 | if (count + delta >= pcu->max_out_size) { | |
584 | error = ims_pcu_send_cmd_chunk(pcu, command, ++chunk, count); | |
585 | if (error) | |
586 | return error; | |
587 | ||
588 | count = 0; | |
589 | } | |
590 | ||
591 | if (delta == 3) | |
592 | pcu->urb_out_buf[count++] = IMS_PCU_PROTOCOL_DLE; | |
593 | ||
594 | pcu->urb_out_buf[count++] = csum; | |
595 | pcu->urb_out_buf[count++] = IMS_PCU_PROTOCOL_ETX; | |
596 | ||
597 | return ims_pcu_send_cmd_chunk(pcu, command, ++chunk, count); | |
598 | } | |
599 | ||
600 | static int __ims_pcu_execute_command(struct ims_pcu *pcu, | |
601 | u8 command, const void *data, size_t len, | |
602 | u8 expected_response, int response_time) | |
603 | { | |
604 | int error; | |
605 | ||
606 | pcu->expected_response = expected_response; | |
607 | init_completion(&pcu->cmd_done); | |
608 | ||
609 | error = ims_pcu_send_command(pcu, command, data, len); | |
610 | if (error) | |
611 | return error; | |
612 | ||
613 | if (expected_response && | |
614 | !wait_for_completion_timeout(&pcu->cmd_done, | |
615 | msecs_to_jiffies(response_time))) { | |
616 | dev_dbg(pcu->dev, "Command 0x%02x timed out\n", command); | |
617 | return -ETIMEDOUT; | |
618 | } | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
623 | #define ims_pcu_execute_command(pcu, code, data, len) \ | |
624 | __ims_pcu_execute_command(pcu, \ | |
625 | IMS_PCU_CMD_##code, data, len, \ | |
626 | IMS_PCU_RSP_##code, \ | |
627 | IMS_PCU_CMD_RESPONSE_TIMEOUT) | |
628 | ||
629 | #define ims_pcu_execute_query(pcu, code) \ | |
630 | ims_pcu_execute_command(pcu, code, NULL, 0) | |
631 | ||
632 | /* Bootloader commands */ | |
633 | #define IMS_PCU_BL_CMD_QUERY_DEVICE 0xa1 | |
634 | #define IMS_PCU_BL_CMD_UNLOCK_CONFIG 0xa2 | |
635 | #define IMS_PCU_BL_CMD_ERASE_APP 0xa3 | |
636 | #define IMS_PCU_BL_CMD_PROGRAM_DEVICE 0xa4 | |
637 | #define IMS_PCU_BL_CMD_PROGRAM_COMPLETE 0xa5 | |
638 | #define IMS_PCU_BL_CMD_READ_APP 0xa6 | |
639 | #define IMS_PCU_BL_CMD_RESET_DEVICE 0xa7 | |
640 | #define IMS_PCU_BL_CMD_LAUNCH_APP 0xa8 | |
641 | ||
642 | /* Bootloader commands */ | |
643 | #define IMS_PCU_BL_RSP_QUERY_DEVICE 0xc1 | |
644 | #define IMS_PCU_BL_RSP_UNLOCK_CONFIG 0xc2 | |
645 | #define IMS_PCU_BL_RSP_ERASE_APP 0xc3 | |
646 | #define IMS_PCU_BL_RSP_PROGRAM_DEVICE 0xc4 | |
647 | #define IMS_PCU_BL_RSP_PROGRAM_COMPLETE 0xc5 | |
648 | #define IMS_PCU_BL_RSP_READ_APP 0xc6 | |
649 | #define IMS_PCU_BL_RSP_RESET_DEVICE 0 /* originally 0xa7 */ | |
650 | #define IMS_PCU_BL_RSP_LAUNCH_APP 0 /* originally 0xa8 */ | |
651 | ||
652 | #define IMS_PCU_BL_DATA_OFFSET 3 | |
653 | ||
654 | static int __ims_pcu_execute_bl_command(struct ims_pcu *pcu, | |
655 | u8 command, const void *data, size_t len, | |
656 | u8 expected_response, int response_time) | |
657 | { | |
658 | int error; | |
659 | ||
660 | pcu->cmd_buf[0] = command; | |
661 | if (data) | |
662 | memcpy(&pcu->cmd_buf[1], data, len); | |
663 | ||
664 | error = __ims_pcu_execute_command(pcu, | |
665 | IMS_PCU_CMD_BOOTLOADER, pcu->cmd_buf, len + 1, | |
666 | expected_response ? IMS_PCU_RSP_BOOTLOADER : 0, | |
667 | response_time); | |
668 | if (error) { | |
669 | dev_err(pcu->dev, | |
670 | "Failure when sending 0x%02x command to bootloader, error: %d\n", | |
671 | pcu->cmd_buf[0], error); | |
672 | return error; | |
673 | } | |
674 | ||
675 | if (expected_response && pcu->cmd_buf[2] != expected_response) { | |
676 | dev_err(pcu->dev, | |
677 | "Unexpected response from bootloader: 0x%02x, wanted 0x%02x\n", | |
678 | pcu->cmd_buf[2], expected_response); | |
679 | return -EINVAL; | |
680 | } | |
681 | ||
682 | return 0; | |
683 | } | |
684 | ||
685 | #define ims_pcu_execute_bl_command(pcu, code, data, len, timeout) \ | |
686 | __ims_pcu_execute_bl_command(pcu, \ | |
687 | IMS_PCU_BL_CMD_##code, data, len, \ | |
688 | IMS_PCU_BL_RSP_##code, timeout) \ | |
689 | ||
690 | #define IMS_PCU_INFO_PART_OFFSET 2 | |
691 | #define IMS_PCU_INFO_DOM_OFFSET 17 | |
692 | #define IMS_PCU_INFO_SERIAL_OFFSET 25 | |
693 | ||
694 | #define IMS_PCU_SET_INFO_SIZE 31 | |
695 | ||
696 | static int ims_pcu_get_info(struct ims_pcu *pcu) | |
697 | { | |
698 | int error; | |
699 | ||
700 | error = ims_pcu_execute_query(pcu, GET_INFO); | |
701 | if (error) { | |
702 | dev_err(pcu->dev, | |
703 | "GET_INFO command failed, error: %d\n", error); | |
704 | return error; | |
705 | } | |
706 | ||
707 | memcpy(pcu->part_number, | |
708 | &pcu->cmd_buf[IMS_PCU_INFO_PART_OFFSET], | |
709 | sizeof(pcu->part_number)); | |
710 | memcpy(pcu->date_of_manufacturing, | |
711 | &pcu->cmd_buf[IMS_PCU_INFO_DOM_OFFSET], | |
712 | sizeof(pcu->date_of_manufacturing)); | |
713 | memcpy(pcu->serial_number, | |
714 | &pcu->cmd_buf[IMS_PCU_INFO_SERIAL_OFFSET], | |
715 | sizeof(pcu->serial_number)); | |
716 | ||
717 | return 0; | |
718 | } | |
719 | ||
720 | static int ims_pcu_set_info(struct ims_pcu *pcu) | |
721 | { | |
722 | int error; | |
723 | ||
724 | memcpy(&pcu->cmd_buf[IMS_PCU_INFO_PART_OFFSET], | |
725 | pcu->part_number, sizeof(pcu->part_number)); | |
726 | memcpy(&pcu->cmd_buf[IMS_PCU_INFO_DOM_OFFSET], | |
727 | pcu->date_of_manufacturing, sizeof(pcu->date_of_manufacturing)); | |
728 | memcpy(&pcu->cmd_buf[IMS_PCU_INFO_SERIAL_OFFSET], | |
729 | pcu->serial_number, sizeof(pcu->serial_number)); | |
730 | ||
731 | error = ims_pcu_execute_command(pcu, SET_INFO, | |
732 | &pcu->cmd_buf[IMS_PCU_DATA_OFFSET], | |
733 | IMS_PCU_SET_INFO_SIZE); | |
734 | if (error) { | |
735 | dev_err(pcu->dev, | |
736 | "Failed to update device information, error: %d\n", | |
737 | error); | |
738 | return error; | |
739 | } | |
740 | ||
741 | return 0; | |
742 | } | |
743 | ||
744 | static int ims_pcu_switch_to_bootloader(struct ims_pcu *pcu) | |
745 | { | |
746 | int error; | |
747 | ||
748 | /* Execute jump to the bootoloader */ | |
749 | error = ims_pcu_execute_command(pcu, JUMP_TO_BTLDR, NULL, 0); | |
750 | if (error) { | |
751 | dev_err(pcu->dev, | |
752 | "Failure when sending JUMP TO BOOLTLOADER command, error: %d\n", | |
753 | error); | |
754 | return error; | |
755 | } | |
756 | ||
757 | return 0; | |
758 | } | |
759 | ||
760 | /********************************************************************* | |
761 | * Firmware Update handling * | |
762 | *********************************************************************/ | |
763 | ||
764 | #define IMS_PCU_FIRMWARE_NAME "imspcu.fw" | |
765 | ||
766 | struct ims_pcu_flash_fmt { | |
767 | __le32 addr; | |
768 | u8 len; | |
769 | u8 data[]; | |
770 | }; | |
771 | ||
772 | static unsigned int ims_pcu_count_fw_records(const struct firmware *fw) | |
773 | { | |
774 | const struct ihex_binrec *rec = (const struct ihex_binrec *)fw->data; | |
775 | unsigned int count = 0; | |
776 | ||
777 | while (rec) { | |
778 | count++; | |
779 | rec = ihex_next_binrec(rec); | |
780 | } | |
781 | ||
782 | return count; | |
783 | } | |
784 | ||
785 | static int ims_pcu_verify_block(struct ims_pcu *pcu, | |
786 | u32 addr, u8 len, const u8 *data) | |
787 | { | |
788 | struct ims_pcu_flash_fmt *fragment; | |
789 | int error; | |
790 | ||
791 | fragment = (void *)&pcu->cmd_buf[1]; | |
792 | put_unaligned_le32(addr, &fragment->addr); | |
793 | fragment->len = len; | |
794 | ||
795 | error = ims_pcu_execute_bl_command(pcu, READ_APP, NULL, 5, | |
796 | IMS_PCU_CMD_RESPONSE_TIMEOUT); | |
797 | if (error) { | |
798 | dev_err(pcu->dev, | |
799 | "Failed to retrieve block at 0x%08x, len %d, error: %d\n", | |
800 | addr, len, error); | |
801 | return error; | |
802 | } | |
803 | ||
804 | fragment = (void *)&pcu->cmd_buf[IMS_PCU_BL_DATA_OFFSET]; | |
805 | if (get_unaligned_le32(&fragment->addr) != addr || | |
806 | fragment->len != len) { | |
807 | dev_err(pcu->dev, | |
808 | "Wrong block when retrieving 0x%08x (0x%08x), len %d (%d)\n", | |
809 | addr, get_unaligned_le32(&fragment->addr), | |
810 | len, fragment->len); | |
811 | return -EINVAL; | |
812 | } | |
813 | ||
814 | if (memcmp(fragment->data, data, len)) { | |
815 | dev_err(pcu->dev, | |
816 | "Mismatch in block at 0x%08x, len %d\n", | |
817 | addr, len); | |
818 | return -EINVAL; | |
819 | } | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | static int ims_pcu_flash_firmware(struct ims_pcu *pcu, | |
825 | const struct firmware *fw, | |
826 | unsigned int n_fw_records) | |
827 | { | |
828 | const struct ihex_binrec *rec = (const struct ihex_binrec *)fw->data; | |
829 | struct ims_pcu_flash_fmt *fragment; | |
830 | unsigned int count = 0; | |
831 | u32 addr; | |
832 | u8 len; | |
833 | int error; | |
834 | ||
835 | error = ims_pcu_execute_bl_command(pcu, ERASE_APP, NULL, 0, 2000); | |
836 | if (error) { | |
837 | dev_err(pcu->dev, | |
838 | "Failed to erase application image, error: %d\n", | |
839 | error); | |
840 | return error; | |
841 | } | |
842 | ||
843 | while (rec) { | |
844 | /* | |
845 | * The firmware format is messed up for some reason. | |
846 | * The address twice that of what is needed for some | |
847 | * reason and we end up overwriting half of the data | |
848 | * with the next record. | |
849 | */ | |
850 | addr = be32_to_cpu(rec->addr) / 2; | |
851 | len = be16_to_cpu(rec->len); | |
852 | ||
853 | fragment = (void *)&pcu->cmd_buf[1]; | |
854 | put_unaligned_le32(addr, &fragment->addr); | |
855 | fragment->len = len; | |
856 | memcpy(fragment->data, rec->data, len); | |
857 | ||
858 | error = ims_pcu_execute_bl_command(pcu, PROGRAM_DEVICE, | |
859 | NULL, len + 5, | |
860 | IMS_PCU_CMD_RESPONSE_TIMEOUT); | |
861 | if (error) { | |
862 | dev_err(pcu->dev, | |
863 | "Failed to write block at 0x%08x, len %d, error: %d\n", | |
864 | addr, len, error); | |
865 | return error; | |
866 | } | |
867 | ||
868 | if (addr >= pcu->fw_start_addr && addr < pcu->fw_end_addr) { | |
869 | error = ims_pcu_verify_block(pcu, addr, len, rec->data); | |
870 | if (error) | |
871 | return error; | |
872 | } | |
873 | ||
874 | count++; | |
875 | pcu->update_firmware_status = (count * 100) / n_fw_records; | |
876 | ||
877 | rec = ihex_next_binrec(rec); | |
878 | } | |
879 | ||
880 | error = ims_pcu_execute_bl_command(pcu, PROGRAM_COMPLETE, | |
881 | NULL, 0, 2000); | |
882 | if (error) | |
883 | dev_err(pcu->dev, | |
884 | "Failed to send PROGRAM_COMPLETE, error: %d\n", | |
885 | error); | |
886 | ||
887 | return 0; | |
888 | } | |
889 | ||
890 | static int ims_pcu_handle_firmware_update(struct ims_pcu *pcu, | |
891 | const struct firmware *fw) | |
892 | { | |
893 | unsigned int n_fw_records; | |
894 | int retval; | |
895 | ||
896 | dev_info(pcu->dev, "Updating firmware %s, size: %zu\n", | |
897 | IMS_PCU_FIRMWARE_NAME, fw->size); | |
898 | ||
899 | n_fw_records = ims_pcu_count_fw_records(fw); | |
900 | ||
901 | retval = ims_pcu_flash_firmware(pcu, fw, n_fw_records); | |
902 | if (retval) | |
903 | goto out; | |
904 | ||
905 | retval = ims_pcu_execute_bl_command(pcu, LAUNCH_APP, NULL, 0, 0); | |
906 | if (retval) | |
907 | dev_err(pcu->dev, | |
908 | "Failed to start application image, error: %d\n", | |
909 | retval); | |
910 | ||
911 | out: | |
912 | pcu->update_firmware_status = retval; | |
913 | sysfs_notify(&pcu->dev->kobj, NULL, "update_firmware_status"); | |
914 | return retval; | |
915 | } | |
916 | ||
917 | static void ims_pcu_process_async_firmware(const struct firmware *fw, | |
918 | void *context) | |
919 | { | |
920 | struct ims_pcu *pcu = context; | |
921 | int error; | |
922 | ||
923 | if (!fw) { | |
924 | dev_err(pcu->dev, "Failed to get firmware %s\n", | |
925 | IMS_PCU_FIRMWARE_NAME); | |
926 | goto out; | |
927 | } | |
928 | ||
929 | error = ihex_validate_fw(fw); | |
930 | if (error) { | |
931 | dev_err(pcu->dev, "Firmware %s is invalid\n", | |
932 | IMS_PCU_FIRMWARE_NAME); | |
933 | goto out; | |
934 | } | |
935 | ||
936 | mutex_lock(&pcu->cmd_mutex); | |
937 | ims_pcu_handle_firmware_update(pcu, fw); | |
938 | mutex_unlock(&pcu->cmd_mutex); | |
939 | ||
940 | release_firmware(fw); | |
941 | ||
942 | out: | |
943 | complete(&pcu->async_firmware_done); | |
944 | } | |
945 | ||
946 | /********************************************************************* | |
947 | * Backlight LED device support * | |
948 | *********************************************************************/ | |
949 | ||
950 | #define IMS_PCU_MAX_BRIGHTNESS 31998 | |
951 | ||
952 | static void ims_pcu_backlight_work(struct work_struct *work) | |
953 | { | |
954 | struct ims_pcu_backlight *backlight = | |
955 | container_of(work, struct ims_pcu_backlight, work); | |
956 | struct ims_pcu *pcu = | |
957 | container_of(backlight, struct ims_pcu, backlight); | |
958 | int desired_brightness = backlight->desired_brightness; | |
959 | __le16 br_val = cpu_to_le16(desired_brightness); | |
960 | int error; | |
961 | ||
962 | mutex_lock(&pcu->cmd_mutex); | |
963 | ||
964 | error = ims_pcu_execute_command(pcu, SET_BRIGHTNESS, | |
965 | &br_val, sizeof(br_val)); | |
966 | if (error && error != -ENODEV) | |
967 | dev_warn(pcu->dev, | |
968 | "Failed to set desired brightness %u, error: %d\n", | |
969 | desired_brightness, error); | |
970 | ||
971 | mutex_unlock(&pcu->cmd_mutex); | |
972 | } | |
973 | ||
974 | static void ims_pcu_backlight_set_brightness(struct led_classdev *cdev, | |
975 | enum led_brightness value) | |
976 | { | |
977 | struct ims_pcu_backlight *backlight = | |
978 | container_of(cdev, struct ims_pcu_backlight, cdev); | |
979 | ||
980 | backlight->desired_brightness = value; | |
981 | schedule_work(&backlight->work); | |
982 | } | |
983 | ||
984 | static enum led_brightness | |
985 | ims_pcu_backlight_get_brightness(struct led_classdev *cdev) | |
986 | { | |
987 | struct ims_pcu_backlight *backlight = | |
988 | container_of(cdev, struct ims_pcu_backlight, cdev); | |
989 | struct ims_pcu *pcu = | |
990 | container_of(backlight, struct ims_pcu, backlight); | |
991 | int brightness; | |
992 | int error; | |
993 | ||
994 | mutex_lock(&pcu->cmd_mutex); | |
995 | ||
996 | error = ims_pcu_execute_query(pcu, GET_BRIGHTNESS); | |
997 | if (error) { | |
998 | dev_warn(pcu->dev, | |
999 | "Failed to get current brightness, error: %d\n", | |
1000 | error); | |
1001 | /* Assume the LED is OFF */ | |
1002 | brightness = LED_OFF; | |
1003 | } else { | |
1004 | brightness = | |
1005 | get_unaligned_le16(&pcu->cmd_buf[IMS_PCU_DATA_OFFSET]); | |
1006 | } | |
1007 | ||
1008 | mutex_unlock(&pcu->cmd_mutex); | |
1009 | ||
1010 | return brightness; | |
1011 | } | |
1012 | ||
1013 | static int ims_pcu_setup_backlight(struct ims_pcu *pcu) | |
1014 | { | |
1015 | struct ims_pcu_backlight *backlight = &pcu->backlight; | |
1016 | int error; | |
1017 | ||
1018 | INIT_WORK(&backlight->work, ims_pcu_backlight_work); | |
1019 | snprintf(backlight->name, sizeof(backlight->name), | |
1020 | "pcu%d::kbd_backlight", pcu->device_no); | |
1021 | ||
1022 | backlight->cdev.name = backlight->name; | |
1023 | backlight->cdev.max_brightness = IMS_PCU_MAX_BRIGHTNESS; | |
1024 | backlight->cdev.brightness_get = ims_pcu_backlight_get_brightness; | |
1025 | backlight->cdev.brightness_set = ims_pcu_backlight_set_brightness; | |
1026 | ||
1027 | error = led_classdev_register(pcu->dev, &backlight->cdev); | |
1028 | if (error) { | |
1029 | dev_err(pcu->dev, | |
1030 | "Failed to register backlight LED device, error: %d\n", | |
1031 | error); | |
1032 | return error; | |
1033 | } | |
1034 | ||
1035 | return 0; | |
1036 | } | |
1037 | ||
1038 | static void ims_pcu_destroy_backlight(struct ims_pcu *pcu) | |
1039 | { | |
1040 | struct ims_pcu_backlight *backlight = &pcu->backlight; | |
1041 | ||
1042 | led_classdev_unregister(&backlight->cdev); | |
1043 | cancel_work_sync(&backlight->work); | |
1044 | } | |
1045 | ||
1046 | ||
1047 | /********************************************************************* | |
1048 | * Sysfs attributes handling * | |
1049 | *********************************************************************/ | |
1050 | ||
1051 | struct ims_pcu_attribute { | |
1052 | struct device_attribute dattr; | |
1053 | size_t field_offset; | |
1054 | int field_length; | |
1055 | }; | |
1056 | ||
1057 | static ssize_t ims_pcu_attribute_show(struct device *dev, | |
1058 | struct device_attribute *dattr, | |
1059 | char *buf) | |
1060 | { | |
1061 | struct usb_interface *intf = to_usb_interface(dev); | |
1062 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
1063 | struct ims_pcu_attribute *attr = | |
1064 | container_of(dattr, struct ims_pcu_attribute, dattr); | |
1065 | char *field = (char *)pcu + attr->field_offset; | |
1066 | ||
1067 | return scnprintf(buf, PAGE_SIZE, "%.*s\n", attr->field_length, field); | |
1068 | } | |
1069 | ||
1070 | static ssize_t ims_pcu_attribute_store(struct device *dev, | |
1071 | struct device_attribute *dattr, | |
1072 | const char *buf, size_t count) | |
1073 | { | |
1074 | ||
1075 | struct usb_interface *intf = to_usb_interface(dev); | |
1076 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
1077 | struct ims_pcu_attribute *attr = | |
1078 | container_of(dattr, struct ims_pcu_attribute, dattr); | |
1079 | char *field = (char *)pcu + attr->field_offset; | |
1080 | size_t data_len; | |
1081 | int error; | |
1082 | ||
1083 | if (count > attr->field_length) | |
1084 | return -EINVAL; | |
1085 | ||
1086 | data_len = strnlen(buf, attr->field_length); | |
1087 | if (data_len > attr->field_length) | |
1088 | return -EINVAL; | |
1089 | ||
1090 | error = mutex_lock_interruptible(&pcu->cmd_mutex); | |
1091 | if (error) | |
1092 | return error; | |
1093 | ||
1094 | memset(field, 0, attr->field_length); | |
1095 | memcpy(field, buf, data_len); | |
1096 | ||
1097 | error = ims_pcu_set_info(pcu); | |
1098 | ||
1099 | /* | |
1100 | * Even if update failed, let's fetch the info again as we just | |
1101 | * clobbered one of the fields. | |
1102 | */ | |
1103 | ims_pcu_get_info(pcu); | |
1104 | ||
1105 | mutex_unlock(&pcu->cmd_mutex); | |
1106 | ||
1107 | return error < 0 ? error : count; | |
1108 | } | |
1109 | ||
1110 | #define IMS_PCU_ATTR(_field, _mode) \ | |
1111 | struct ims_pcu_attribute ims_pcu_attr_##_field = { \ | |
1112 | .dattr = __ATTR(_field, _mode, \ | |
1113 | ims_pcu_attribute_show, \ | |
1114 | ims_pcu_attribute_store), \ | |
1115 | .field_offset = offsetof(struct ims_pcu, _field), \ | |
1116 | .field_length = sizeof(((struct ims_pcu *)NULL)->_field), \ | |
1117 | } | |
1118 | ||
1119 | #define IMS_PCU_RO_ATTR(_field) \ | |
1120 | IMS_PCU_ATTR(_field, S_IRUGO) | |
1121 | #define IMS_PCU_RW_ATTR(_field) \ | |
1122 | IMS_PCU_ATTR(_field, S_IRUGO | S_IWUSR) | |
1123 | ||
1124 | static IMS_PCU_RW_ATTR(part_number); | |
1125 | static IMS_PCU_RW_ATTR(serial_number); | |
1126 | static IMS_PCU_RW_ATTR(date_of_manufacturing); | |
1127 | ||
1128 | static IMS_PCU_RO_ATTR(fw_version); | |
1129 | static IMS_PCU_RO_ATTR(bl_version); | |
1130 | static IMS_PCU_RO_ATTR(reset_reason); | |
1131 | ||
1132 | static ssize_t ims_pcu_reset_device(struct device *dev, | |
1133 | struct device_attribute *dattr, | |
1134 | const char *buf, size_t count) | |
1135 | { | |
1136 | static const u8 reset_byte = 1; | |
1137 | struct usb_interface *intf = to_usb_interface(dev); | |
1138 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
1139 | int value; | |
1140 | int error; | |
1141 | ||
1142 | error = kstrtoint(buf, 0, &value); | |
1143 | if (error) | |
1144 | return error; | |
1145 | ||
1146 | if (value != 1) | |
1147 | return -EINVAL; | |
1148 | ||
1149 | dev_info(pcu->dev, "Attempting to reset device\n"); | |
1150 | ||
1151 | error = ims_pcu_execute_command(pcu, PCU_RESET, &reset_byte, 1); | |
1152 | if (error) { | |
1153 | dev_info(pcu->dev, | |
1154 | "Failed to reset device, error: %d\n", | |
1155 | error); | |
1156 | return error; | |
1157 | } | |
1158 | ||
1159 | return count; | |
1160 | } | |
1161 | ||
1162 | static DEVICE_ATTR(reset_device, S_IWUSR, NULL, ims_pcu_reset_device); | |
1163 | ||
1164 | static ssize_t ims_pcu_update_firmware_store(struct device *dev, | |
1165 | struct device_attribute *dattr, | |
1166 | const char *buf, size_t count) | |
1167 | { | |
1168 | struct usb_interface *intf = to_usb_interface(dev); | |
1169 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
3c2b9010 | 1170 | const struct firmware *fw = NULL; |
628329d5 DT |
1171 | int value; |
1172 | int error; | |
1173 | ||
1174 | error = kstrtoint(buf, 0, &value); | |
1175 | if (error) | |
1176 | return error; | |
1177 | ||
1178 | if (value != 1) | |
1179 | return -EINVAL; | |
1180 | ||
1181 | error = mutex_lock_interruptible(&pcu->cmd_mutex); | |
1182 | if (error) | |
1183 | return error; | |
1184 | ||
1185 | error = request_ihex_firmware(&fw, IMS_PCU_FIRMWARE_NAME, pcu->dev); | |
1186 | if (error) { | |
1187 | dev_err(pcu->dev, "Failed to request firmware %s, error: %d\n", | |
1188 | IMS_PCU_FIRMWARE_NAME, error); | |
1189 | goto out; | |
1190 | } | |
1191 | ||
1192 | /* | |
1193 | * If we are already in bootloader mode we can proceed with | |
1194 | * flashing the firmware. | |
1195 | * | |
1196 | * If we are in application mode, then we need to switch into | |
1197 | * bootloader mode, which will cause the device to disconnect | |
1198 | * and reconnect as different device. | |
1199 | */ | |
1200 | if (pcu->bootloader_mode) | |
1201 | error = ims_pcu_handle_firmware_update(pcu, fw); | |
1202 | else | |
1203 | error = ims_pcu_switch_to_bootloader(pcu); | |
1204 | ||
1205 | release_firmware(fw); | |
1206 | ||
1207 | out: | |
1208 | mutex_unlock(&pcu->cmd_mutex); | |
1209 | return error ?: count; | |
1210 | } | |
1211 | ||
1212 | static DEVICE_ATTR(update_firmware, S_IWUSR, | |
1213 | NULL, ims_pcu_update_firmware_store); | |
1214 | ||
1215 | static ssize_t | |
1216 | ims_pcu_update_firmware_status_show(struct device *dev, | |
1217 | struct device_attribute *dattr, | |
1218 | char *buf) | |
1219 | { | |
1220 | struct usb_interface *intf = to_usb_interface(dev); | |
1221 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
1222 | ||
1223 | return scnprintf(buf, PAGE_SIZE, "%d\n", pcu->update_firmware_status); | |
1224 | } | |
1225 | ||
1226 | static DEVICE_ATTR(update_firmware_status, S_IRUGO, | |
1227 | ims_pcu_update_firmware_status_show, NULL); | |
1228 | ||
1229 | static struct attribute *ims_pcu_attrs[] = { | |
1230 | &ims_pcu_attr_part_number.dattr.attr, | |
1231 | &ims_pcu_attr_serial_number.dattr.attr, | |
1232 | &ims_pcu_attr_date_of_manufacturing.dattr.attr, | |
1233 | &ims_pcu_attr_fw_version.dattr.attr, | |
1234 | &ims_pcu_attr_bl_version.dattr.attr, | |
1235 | &ims_pcu_attr_reset_reason.dattr.attr, | |
1236 | &dev_attr_reset_device.attr, | |
1237 | &dev_attr_update_firmware.attr, | |
1238 | &dev_attr_update_firmware_status.attr, | |
1239 | NULL | |
1240 | }; | |
1241 | ||
1242 | static umode_t ims_pcu_is_attr_visible(struct kobject *kobj, | |
1243 | struct attribute *attr, int n) | |
1244 | { | |
1245 | struct device *dev = container_of(kobj, struct device, kobj); | |
1246 | struct usb_interface *intf = to_usb_interface(dev); | |
1247 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
1248 | umode_t mode = attr->mode; | |
1249 | ||
1250 | if (pcu->bootloader_mode) { | |
1251 | if (attr != &dev_attr_update_firmware_status.attr && | |
1252 | attr != &dev_attr_update_firmware.attr && | |
1253 | attr != &dev_attr_reset_device.attr) { | |
1254 | mode = 0; | |
1255 | } | |
1256 | } else { | |
1257 | if (attr == &dev_attr_update_firmware_status.attr) | |
1258 | mode = 0; | |
1259 | } | |
1260 | ||
1261 | return mode; | |
1262 | } | |
1263 | ||
1264 | static struct attribute_group ims_pcu_attr_group = { | |
1265 | .is_visible = ims_pcu_is_attr_visible, | |
1266 | .attrs = ims_pcu_attrs, | |
1267 | }; | |
1268 | ||
e5fcd269 AS |
1269 | /* Support for a separate OFN attribute group */ |
1270 | ||
1271 | #define OFN_REG_RESULT_OFFSET 2 | |
1272 | ||
1273 | static int ims_pcu_read_ofn_config(struct ims_pcu *pcu, u8 addr, u8 *data) | |
1274 | { | |
1275 | int error; | |
1276 | s16 result; | |
1277 | ||
1278 | error = ims_pcu_execute_command(pcu, OFN_GET_CONFIG, | |
1279 | &addr, sizeof(addr)); | |
1280 | if (error) | |
1281 | return error; | |
1282 | ||
1283 | result = (s16)get_unaligned_le16(pcu->cmd_buf + OFN_REG_RESULT_OFFSET); | |
1284 | if (result < 0) | |
1285 | return -EIO; | |
1286 | ||
1287 | /* We only need LSB */ | |
1288 | *data = pcu->cmd_buf[OFN_REG_RESULT_OFFSET]; | |
1289 | return 0; | |
1290 | } | |
1291 | ||
1292 | static int ims_pcu_write_ofn_config(struct ims_pcu *pcu, u8 addr, u8 data) | |
1293 | { | |
1294 | u8 buffer[] = { addr, data }; | |
1295 | int error; | |
1296 | s16 result; | |
1297 | ||
1298 | error = ims_pcu_execute_command(pcu, OFN_SET_CONFIG, | |
1299 | &buffer, sizeof(buffer)); | |
1300 | if (error) | |
1301 | return error; | |
1302 | ||
1303 | result = (s16)get_unaligned_le16(pcu->cmd_buf + OFN_REG_RESULT_OFFSET); | |
1304 | if (result < 0) | |
1305 | return -EIO; | |
1306 | ||
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | static ssize_t ims_pcu_ofn_reg_data_show(struct device *dev, | |
1311 | struct device_attribute *dattr, | |
1312 | char *buf) | |
1313 | { | |
1314 | struct usb_interface *intf = to_usb_interface(dev); | |
1315 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
1316 | int error; | |
1317 | u8 data; | |
1318 | ||
1319 | mutex_lock(&pcu->cmd_mutex); | |
1320 | error = ims_pcu_read_ofn_config(pcu, pcu->ofn_reg_addr, &data); | |
1321 | mutex_unlock(&pcu->cmd_mutex); | |
1322 | ||
1323 | if (error) | |
1324 | return error; | |
1325 | ||
1326 | return scnprintf(buf, PAGE_SIZE, "%x\n", data); | |
1327 | } | |
1328 | ||
1329 | static ssize_t ims_pcu_ofn_reg_data_store(struct device *dev, | |
1330 | struct device_attribute *dattr, | |
1331 | const char *buf, size_t count) | |
1332 | { | |
1333 | struct usb_interface *intf = to_usb_interface(dev); | |
1334 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
1335 | int error; | |
1336 | u8 value; | |
1337 | ||
1338 | error = kstrtou8(buf, 0, &value); | |
1339 | if (error) | |
1340 | return error; | |
1341 | ||
1342 | mutex_lock(&pcu->cmd_mutex); | |
1343 | error = ims_pcu_write_ofn_config(pcu, pcu->ofn_reg_addr, value); | |
1344 | mutex_unlock(&pcu->cmd_mutex); | |
1345 | ||
1346 | return error ?: count; | |
1347 | } | |
1348 | ||
1349 | static DEVICE_ATTR(reg_data, S_IRUGO | S_IWUSR, | |
1350 | ims_pcu_ofn_reg_data_show, ims_pcu_ofn_reg_data_store); | |
1351 | ||
1352 | static ssize_t ims_pcu_ofn_reg_addr_show(struct device *dev, | |
1353 | struct device_attribute *dattr, | |
1354 | char *buf) | |
1355 | { | |
1356 | struct usb_interface *intf = to_usb_interface(dev); | |
1357 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
1358 | int error; | |
1359 | ||
1360 | mutex_lock(&pcu->cmd_mutex); | |
1361 | error = scnprintf(buf, PAGE_SIZE, "%x\n", pcu->ofn_reg_addr); | |
1362 | mutex_unlock(&pcu->cmd_mutex); | |
1363 | ||
1364 | return error; | |
1365 | } | |
1366 | ||
1367 | static ssize_t ims_pcu_ofn_reg_addr_store(struct device *dev, | |
1368 | struct device_attribute *dattr, | |
1369 | const char *buf, size_t count) | |
1370 | { | |
1371 | struct usb_interface *intf = to_usb_interface(dev); | |
1372 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
1373 | int error; | |
1374 | u8 value; | |
1375 | ||
1376 | error = kstrtou8(buf, 0, &value); | |
1377 | if (error) | |
1378 | return error; | |
1379 | ||
1380 | mutex_lock(&pcu->cmd_mutex); | |
1381 | pcu->ofn_reg_addr = value; | |
1382 | mutex_unlock(&pcu->cmd_mutex); | |
1383 | ||
60183a6e | 1384 | return count; |
e5fcd269 AS |
1385 | } |
1386 | ||
1387 | static DEVICE_ATTR(reg_addr, S_IRUGO | S_IWUSR, | |
1388 | ims_pcu_ofn_reg_addr_show, ims_pcu_ofn_reg_addr_store); | |
1389 | ||
1390 | struct ims_pcu_ofn_bit_attribute { | |
1391 | struct device_attribute dattr; | |
1392 | u8 addr; | |
1393 | u8 nr; | |
1394 | }; | |
1395 | ||
1396 | static ssize_t ims_pcu_ofn_bit_show(struct device *dev, | |
1397 | struct device_attribute *dattr, | |
1398 | char *buf) | |
1399 | { | |
1400 | struct usb_interface *intf = to_usb_interface(dev); | |
1401 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
1402 | struct ims_pcu_ofn_bit_attribute *attr = | |
1403 | container_of(dattr, struct ims_pcu_ofn_bit_attribute, dattr); | |
1404 | int error; | |
1405 | u8 data; | |
1406 | ||
1407 | mutex_lock(&pcu->cmd_mutex); | |
1408 | error = ims_pcu_read_ofn_config(pcu, attr->addr, &data); | |
1409 | mutex_unlock(&pcu->cmd_mutex); | |
1410 | ||
1411 | if (error) | |
1412 | return error; | |
1413 | ||
1414 | return scnprintf(buf, PAGE_SIZE, "%d\n", !!(data & (1 << attr->nr))); | |
1415 | } | |
1416 | ||
1417 | static ssize_t ims_pcu_ofn_bit_store(struct device *dev, | |
1418 | struct device_attribute *dattr, | |
1419 | const char *buf, size_t count) | |
1420 | { | |
1421 | struct usb_interface *intf = to_usb_interface(dev); | |
1422 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
1423 | struct ims_pcu_ofn_bit_attribute *attr = | |
1424 | container_of(dattr, struct ims_pcu_ofn_bit_attribute, dattr); | |
1425 | int error; | |
1426 | int value; | |
1427 | u8 data; | |
1428 | ||
1429 | error = kstrtoint(buf, 0, &value); | |
1430 | if (error) | |
1431 | return error; | |
1432 | ||
1433 | if (value > 1) | |
1434 | return -EINVAL; | |
1435 | ||
1436 | mutex_lock(&pcu->cmd_mutex); | |
1437 | ||
1438 | error = ims_pcu_read_ofn_config(pcu, attr->addr, &data); | |
1439 | if (!error) { | |
1440 | if (value) | |
1441 | data |= 1U << attr->nr; | |
1442 | else | |
1443 | data &= ~(1U << attr->nr); | |
1444 | ||
1445 | error = ims_pcu_write_ofn_config(pcu, attr->addr, data); | |
1446 | } | |
1447 | ||
1448 | mutex_unlock(&pcu->cmd_mutex); | |
1449 | ||
1450 | return error ?: count; | |
1451 | } | |
1452 | ||
1453 | #define IMS_PCU_OFN_BIT_ATTR(_field, _addr, _nr) \ | |
1454 | struct ims_pcu_ofn_bit_attribute ims_pcu_ofn_attr_##_field = { \ | |
1455 | .dattr = __ATTR(_field, S_IWUSR | S_IRUGO, \ | |
1456 | ims_pcu_ofn_bit_show, ims_pcu_ofn_bit_store), \ | |
1457 | .addr = _addr, \ | |
1458 | .nr = _nr, \ | |
1459 | } | |
1460 | ||
1461 | static IMS_PCU_OFN_BIT_ATTR(engine_enable, 0x60, 7); | |
1462 | static IMS_PCU_OFN_BIT_ATTR(speed_enable, 0x60, 6); | |
1463 | static IMS_PCU_OFN_BIT_ATTR(assert_enable, 0x60, 5); | |
1464 | static IMS_PCU_OFN_BIT_ATTR(xyquant_enable, 0x60, 4); | |
1465 | static IMS_PCU_OFN_BIT_ATTR(xyscale_enable, 0x60, 1); | |
1466 | ||
1467 | static IMS_PCU_OFN_BIT_ATTR(scale_x2, 0x63, 6); | |
1468 | static IMS_PCU_OFN_BIT_ATTR(scale_y2, 0x63, 7); | |
1469 | ||
1470 | static struct attribute *ims_pcu_ofn_attrs[] = { | |
1471 | &dev_attr_reg_data.attr, | |
1472 | &dev_attr_reg_addr.attr, | |
1473 | &ims_pcu_ofn_attr_engine_enable.dattr.attr, | |
1474 | &ims_pcu_ofn_attr_speed_enable.dattr.attr, | |
1475 | &ims_pcu_ofn_attr_assert_enable.dattr.attr, | |
1476 | &ims_pcu_ofn_attr_xyquant_enable.dattr.attr, | |
1477 | &ims_pcu_ofn_attr_xyscale_enable.dattr.attr, | |
1478 | &ims_pcu_ofn_attr_scale_x2.dattr.attr, | |
1479 | &ims_pcu_ofn_attr_scale_y2.dattr.attr, | |
1480 | NULL | |
1481 | }; | |
1482 | ||
1483 | static struct attribute_group ims_pcu_ofn_attr_group = { | |
1484 | .name = "ofn", | |
1485 | .attrs = ims_pcu_ofn_attrs, | |
1486 | }; | |
1487 | ||
628329d5 DT |
1488 | static void ims_pcu_irq(struct urb *urb) |
1489 | { | |
1490 | struct ims_pcu *pcu = urb->context; | |
1491 | int retval, status; | |
1492 | ||
1493 | status = urb->status; | |
1494 | ||
1495 | switch (status) { | |
1496 | case 0: | |
1497 | /* success */ | |
1498 | break; | |
1499 | case -ECONNRESET: | |
1500 | case -ENOENT: | |
1501 | case -ESHUTDOWN: | |
1502 | /* this urb is terminated, clean up */ | |
1503 | dev_dbg(pcu->dev, "%s - urb shutting down with status: %d\n", | |
1504 | __func__, status); | |
1505 | return; | |
1506 | default: | |
1507 | dev_dbg(pcu->dev, "%s - nonzero urb status received: %d\n", | |
1508 | __func__, status); | |
1509 | goto exit; | |
1510 | } | |
1511 | ||
1512 | dev_dbg(pcu->dev, "%s: received %d: %*ph\n", __func__, | |
1513 | urb->actual_length, urb->actual_length, pcu->urb_in_buf); | |
1514 | ||
1515 | if (urb == pcu->urb_in) | |
1516 | ims_pcu_process_data(pcu, urb); | |
1517 | ||
1518 | exit: | |
1519 | retval = usb_submit_urb(urb, GFP_ATOMIC); | |
1520 | if (retval && retval != -ENODEV) | |
1521 | dev_err(pcu->dev, "%s - usb_submit_urb failed with result %d\n", | |
1522 | __func__, retval); | |
1523 | } | |
1524 | ||
1525 | static int ims_pcu_buffers_alloc(struct ims_pcu *pcu) | |
1526 | { | |
1527 | int error; | |
1528 | ||
1529 | pcu->urb_in_buf = usb_alloc_coherent(pcu->udev, pcu->max_in_size, | |
1530 | GFP_KERNEL, &pcu->read_dma); | |
1531 | if (!pcu->urb_in_buf) { | |
1532 | dev_err(pcu->dev, | |
1533 | "Failed to allocate memory for read buffer\n"); | |
1534 | return -ENOMEM; | |
1535 | } | |
1536 | ||
1537 | pcu->urb_in = usb_alloc_urb(0, GFP_KERNEL); | |
1538 | if (!pcu->urb_in) { | |
1539 | dev_err(pcu->dev, "Failed to allocate input URB\n"); | |
1540 | error = -ENOMEM; | |
1541 | goto err_free_urb_in_buf; | |
1542 | } | |
1543 | ||
1544 | pcu->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1545 | pcu->urb_in->transfer_dma = pcu->read_dma; | |
1546 | ||
1547 | usb_fill_bulk_urb(pcu->urb_in, pcu->udev, | |
1548 | usb_rcvbulkpipe(pcu->udev, | |
1549 | pcu->ep_in->bEndpointAddress), | |
1550 | pcu->urb_in_buf, pcu->max_in_size, | |
1551 | ims_pcu_irq, pcu); | |
1552 | ||
1553 | /* | |
1554 | * We are using usb_bulk_msg() for sending so there is no point | |
1555 | * in allocating memory with usb_alloc_coherent(). | |
1556 | */ | |
1557 | pcu->urb_out_buf = kmalloc(pcu->max_out_size, GFP_KERNEL); | |
1558 | if (!pcu->urb_out_buf) { | |
1559 | dev_err(pcu->dev, "Failed to allocate memory for write buffer\n"); | |
1560 | error = -ENOMEM; | |
1561 | goto err_free_in_urb; | |
1562 | } | |
1563 | ||
1564 | pcu->urb_ctrl_buf = usb_alloc_coherent(pcu->udev, pcu->max_ctrl_size, | |
1565 | GFP_KERNEL, &pcu->ctrl_dma); | |
1566 | if (!pcu->urb_ctrl_buf) { | |
1567 | dev_err(pcu->dev, | |
1568 | "Failed to allocate memory for read buffer\n"); | |
19318de1 | 1569 | error = -ENOMEM; |
628329d5 DT |
1570 | goto err_free_urb_out_buf; |
1571 | } | |
1572 | ||
1573 | pcu->urb_ctrl = usb_alloc_urb(0, GFP_KERNEL); | |
1574 | if (!pcu->urb_ctrl) { | |
1575 | dev_err(pcu->dev, "Failed to allocate input URB\n"); | |
1576 | error = -ENOMEM; | |
1577 | goto err_free_urb_ctrl_buf; | |
1578 | } | |
1579 | ||
1580 | pcu->urb_ctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
1581 | pcu->urb_ctrl->transfer_dma = pcu->ctrl_dma; | |
1582 | ||
1583 | usb_fill_int_urb(pcu->urb_ctrl, pcu->udev, | |
1584 | usb_rcvintpipe(pcu->udev, | |
1585 | pcu->ep_ctrl->bEndpointAddress), | |
1586 | pcu->urb_ctrl_buf, pcu->max_ctrl_size, | |
1587 | ims_pcu_irq, pcu, pcu->ep_ctrl->bInterval); | |
1588 | ||
1589 | return 0; | |
1590 | ||
1591 | err_free_urb_ctrl_buf: | |
1592 | usb_free_coherent(pcu->udev, pcu->max_ctrl_size, | |
1593 | pcu->urb_ctrl_buf, pcu->ctrl_dma); | |
1594 | err_free_urb_out_buf: | |
1595 | kfree(pcu->urb_out_buf); | |
1596 | err_free_in_urb: | |
1597 | usb_free_urb(pcu->urb_in); | |
1598 | err_free_urb_in_buf: | |
1599 | usb_free_coherent(pcu->udev, pcu->max_in_size, | |
1600 | pcu->urb_in_buf, pcu->read_dma); | |
1601 | return error; | |
1602 | } | |
1603 | ||
1604 | static void ims_pcu_buffers_free(struct ims_pcu *pcu) | |
1605 | { | |
1606 | usb_kill_urb(pcu->urb_in); | |
1607 | usb_free_urb(pcu->urb_in); | |
1608 | ||
1609 | usb_free_coherent(pcu->udev, pcu->max_out_size, | |
1610 | pcu->urb_in_buf, pcu->read_dma); | |
1611 | ||
1612 | kfree(pcu->urb_out_buf); | |
1613 | ||
1614 | usb_kill_urb(pcu->urb_ctrl); | |
1615 | usb_free_urb(pcu->urb_ctrl); | |
1616 | ||
1617 | usb_free_coherent(pcu->udev, pcu->max_ctrl_size, | |
1618 | pcu->urb_ctrl_buf, pcu->ctrl_dma); | |
1619 | } | |
1620 | ||
1621 | static const struct usb_cdc_union_desc * | |
1622 | ims_pcu_get_cdc_union_desc(struct usb_interface *intf) | |
1623 | { | |
1624 | const void *buf = intf->altsetting->extra; | |
1625 | size_t buflen = intf->altsetting->extralen; | |
1626 | struct usb_cdc_union_desc *union_desc; | |
1627 | ||
1628 | if (!buf) { | |
1629 | dev_err(&intf->dev, "Missing descriptor data\n"); | |
1630 | return NULL; | |
1631 | } | |
1632 | ||
1633 | if (!buflen) { | |
1634 | dev_err(&intf->dev, "Zero length descriptor\n"); | |
1635 | return NULL; | |
1636 | } | |
1637 | ||
1638 | while (buflen > 0) { | |
1639 | union_desc = (struct usb_cdc_union_desc *)buf; | |
1640 | ||
1641 | if (union_desc->bDescriptorType == USB_DT_CS_INTERFACE && | |
1642 | union_desc->bDescriptorSubType == USB_CDC_UNION_TYPE) { | |
1643 | dev_dbg(&intf->dev, "Found union header\n"); | |
1644 | return union_desc; | |
1645 | } | |
1646 | ||
1647 | buflen -= union_desc->bLength; | |
1648 | buf += union_desc->bLength; | |
1649 | } | |
1650 | ||
1651 | dev_err(&intf->dev, "Missing CDC union descriptor\n"); | |
1652 | return NULL; | |
1653 | } | |
1654 | ||
1655 | static int ims_pcu_parse_cdc_data(struct usb_interface *intf, struct ims_pcu *pcu) | |
1656 | { | |
1657 | const struct usb_cdc_union_desc *union_desc; | |
1658 | struct usb_host_interface *alt; | |
1659 | ||
1660 | union_desc = ims_pcu_get_cdc_union_desc(intf); | |
1661 | if (!union_desc) | |
1662 | return -EINVAL; | |
1663 | ||
1664 | pcu->ctrl_intf = usb_ifnum_to_if(pcu->udev, | |
1665 | union_desc->bMasterInterface0); | |
a0ad220c ON |
1666 | if (!pcu->ctrl_intf) |
1667 | return -EINVAL; | |
628329d5 DT |
1668 | |
1669 | alt = pcu->ctrl_intf->cur_altsetting; | |
1670 | pcu->ep_ctrl = &alt->endpoint[0].desc; | |
1671 | pcu->max_ctrl_size = usb_endpoint_maxp(pcu->ep_ctrl); | |
1672 | ||
1673 | pcu->data_intf = usb_ifnum_to_if(pcu->udev, | |
1674 | union_desc->bSlaveInterface0); | |
a0ad220c ON |
1675 | if (!pcu->data_intf) |
1676 | return -EINVAL; | |
628329d5 DT |
1677 | |
1678 | alt = pcu->data_intf->cur_altsetting; | |
1679 | if (alt->desc.bNumEndpoints != 2) { | |
1680 | dev_err(pcu->dev, | |
1681 | "Incorrect number of endpoints on data interface (%d)\n", | |
1682 | alt->desc.bNumEndpoints); | |
1683 | return -EINVAL; | |
1684 | } | |
1685 | ||
1686 | pcu->ep_out = &alt->endpoint[0].desc; | |
1687 | if (!usb_endpoint_is_bulk_out(pcu->ep_out)) { | |
1688 | dev_err(pcu->dev, | |
1689 | "First endpoint on data interface is not BULK OUT\n"); | |
1690 | return -EINVAL; | |
1691 | } | |
1692 | ||
1693 | pcu->max_out_size = usb_endpoint_maxp(pcu->ep_out); | |
1694 | if (pcu->max_out_size < 8) { | |
1695 | dev_err(pcu->dev, | |
1696 | "Max OUT packet size is too small (%zd)\n", | |
1697 | pcu->max_out_size); | |
1698 | return -EINVAL; | |
1699 | } | |
1700 | ||
1701 | pcu->ep_in = &alt->endpoint[1].desc; | |
1702 | if (!usb_endpoint_is_bulk_in(pcu->ep_in)) { | |
1703 | dev_err(pcu->dev, | |
1704 | "Second endpoint on data interface is not BULK IN\n"); | |
1705 | return -EINVAL; | |
1706 | } | |
1707 | ||
1708 | pcu->max_in_size = usb_endpoint_maxp(pcu->ep_in); | |
1709 | if (pcu->max_in_size < 8) { | |
1710 | dev_err(pcu->dev, | |
1711 | "Max IN packet size is too small (%zd)\n", | |
1712 | pcu->max_in_size); | |
1713 | return -EINVAL; | |
1714 | } | |
1715 | ||
1716 | return 0; | |
1717 | } | |
1718 | ||
1719 | static int ims_pcu_start_io(struct ims_pcu *pcu) | |
1720 | { | |
1721 | int error; | |
1722 | ||
1723 | error = usb_submit_urb(pcu->urb_ctrl, GFP_KERNEL); | |
1724 | if (error) { | |
1725 | dev_err(pcu->dev, | |
1726 | "Failed to start control IO - usb_submit_urb failed with result: %d\n", | |
1727 | error); | |
1728 | return -EIO; | |
1729 | } | |
1730 | ||
1731 | error = usb_submit_urb(pcu->urb_in, GFP_KERNEL); | |
1732 | if (error) { | |
1733 | dev_err(pcu->dev, | |
1734 | "Failed to start IO - usb_submit_urb failed with result: %d\n", | |
1735 | error); | |
1736 | usb_kill_urb(pcu->urb_ctrl); | |
1737 | return -EIO; | |
1738 | } | |
1739 | ||
1740 | return 0; | |
1741 | } | |
1742 | ||
1743 | static void ims_pcu_stop_io(struct ims_pcu *pcu) | |
1744 | { | |
1745 | usb_kill_urb(pcu->urb_in); | |
1746 | usb_kill_urb(pcu->urb_ctrl); | |
1747 | } | |
1748 | ||
1749 | static int ims_pcu_line_setup(struct ims_pcu *pcu) | |
1750 | { | |
1751 | struct usb_host_interface *interface = pcu->ctrl_intf->cur_altsetting; | |
1752 | struct usb_cdc_line_coding *line = (void *)pcu->cmd_buf; | |
1753 | int error; | |
1754 | ||
1755 | memset(line, 0, sizeof(*line)); | |
1756 | line->dwDTERate = cpu_to_le32(57600); | |
1757 | line->bDataBits = 8; | |
1758 | ||
1759 | error = usb_control_msg(pcu->udev, usb_sndctrlpipe(pcu->udev, 0), | |
1760 | USB_CDC_REQ_SET_LINE_CODING, | |
1761 | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
1762 | 0, interface->desc.bInterfaceNumber, | |
1763 | line, sizeof(struct usb_cdc_line_coding), | |
1764 | 5000); | |
1765 | if (error < 0) { | |
1766 | dev_err(pcu->dev, "Failed to set line coding, error: %d\n", | |
1767 | error); | |
1768 | return error; | |
1769 | } | |
1770 | ||
1771 | error = usb_control_msg(pcu->udev, usb_sndctrlpipe(pcu->udev, 0), | |
1772 | USB_CDC_REQ_SET_CONTROL_LINE_STATE, | |
1773 | USB_TYPE_CLASS | USB_RECIP_INTERFACE, | |
1774 | 0x03, interface->desc.bInterfaceNumber, | |
1775 | NULL, 0, 5000); | |
1776 | if (error < 0) { | |
1777 | dev_err(pcu->dev, "Failed to set line state, error: %d\n", | |
1778 | error); | |
1779 | return error; | |
1780 | } | |
1781 | ||
1782 | return 0; | |
1783 | } | |
1784 | ||
1785 | static int ims_pcu_get_device_info(struct ims_pcu *pcu) | |
1786 | { | |
1787 | int error; | |
1788 | ||
1789 | error = ims_pcu_get_info(pcu); | |
1790 | if (error) | |
1791 | return error; | |
1792 | ||
1793 | error = ims_pcu_execute_query(pcu, GET_FW_VERSION); | |
1794 | if (error) { | |
1795 | dev_err(pcu->dev, | |
1796 | "GET_FW_VERSION command failed, error: %d\n", error); | |
1797 | return error; | |
1798 | } | |
1799 | ||
1800 | snprintf(pcu->fw_version, sizeof(pcu->fw_version), | |
1801 | "%02d%02d%02d%02d.%c%c", | |
1802 | pcu->cmd_buf[2], pcu->cmd_buf[3], pcu->cmd_buf[4], pcu->cmd_buf[5], | |
1803 | pcu->cmd_buf[6], pcu->cmd_buf[7]); | |
1804 | ||
1805 | error = ims_pcu_execute_query(pcu, GET_BL_VERSION); | |
1806 | if (error) { | |
1807 | dev_err(pcu->dev, | |
1808 | "GET_BL_VERSION command failed, error: %d\n", error); | |
1809 | return error; | |
1810 | } | |
1811 | ||
1812 | snprintf(pcu->bl_version, sizeof(pcu->bl_version), | |
1813 | "%02d%02d%02d%02d.%c%c", | |
1814 | pcu->cmd_buf[2], pcu->cmd_buf[3], pcu->cmd_buf[4], pcu->cmd_buf[5], | |
1815 | pcu->cmd_buf[6], pcu->cmd_buf[7]); | |
1816 | ||
1817 | error = ims_pcu_execute_query(pcu, RESET_REASON); | |
1818 | if (error) { | |
1819 | dev_err(pcu->dev, | |
1820 | "RESET_REASON command failed, error: %d\n", error); | |
1821 | return error; | |
1822 | } | |
1823 | ||
1824 | snprintf(pcu->reset_reason, sizeof(pcu->reset_reason), | |
1825 | "%02x", pcu->cmd_buf[IMS_PCU_DATA_OFFSET]); | |
1826 | ||
1827 | dev_dbg(pcu->dev, | |
1828 | "P/N: %s, MD: %s, S/N: %s, FW: %s, BL: %s, RR: %s\n", | |
1829 | pcu->part_number, | |
1830 | pcu->date_of_manufacturing, | |
1831 | pcu->serial_number, | |
1832 | pcu->fw_version, | |
1833 | pcu->bl_version, | |
1834 | pcu->reset_reason); | |
1835 | ||
1836 | return 0; | |
1837 | } | |
1838 | ||
1839 | static int ims_pcu_identify_type(struct ims_pcu *pcu, u8 *device_id) | |
1840 | { | |
1841 | int error; | |
1842 | ||
1843 | error = ims_pcu_execute_query(pcu, GET_DEVICE_ID); | |
1844 | if (error) { | |
1845 | dev_err(pcu->dev, | |
1846 | "GET_DEVICE_ID command failed, error: %d\n", error); | |
1847 | return error; | |
1848 | } | |
1849 | ||
1850 | *device_id = pcu->cmd_buf[IMS_PCU_DATA_OFFSET]; | |
1851 | dev_dbg(pcu->dev, "Detected device ID: %d\n", *device_id); | |
1852 | ||
1853 | return 0; | |
1854 | } | |
1855 | ||
1856 | static int ims_pcu_init_application_mode(struct ims_pcu *pcu) | |
1857 | { | |
939ffb17 | 1858 | static atomic_t device_no = ATOMIC_INIT(-1); |
628329d5 DT |
1859 | |
1860 | const struct ims_pcu_device_info *info; | |
628329d5 DT |
1861 | int error; |
1862 | ||
1863 | error = ims_pcu_get_device_info(pcu); | |
1864 | if (error) { | |
1865 | /* Device does not respond to basic queries, hopeless */ | |
1866 | return error; | |
1867 | } | |
1868 | ||
e5fcd269 | 1869 | error = ims_pcu_identify_type(pcu, &pcu->device_id); |
628329d5 DT |
1870 | if (error) { |
1871 | dev_err(pcu->dev, | |
1872 | "Failed to identify device, error: %d\n", error); | |
1873 | /* | |
1874 | * Do not signal error, but do not create input nor | |
1875 | * backlight devices either, let userspace figure this | |
1876 | * out (flash a new firmware?). | |
1877 | */ | |
1878 | return 0; | |
1879 | } | |
1880 | ||
e5fcd269 AS |
1881 | if (pcu->device_id >= ARRAY_SIZE(ims_pcu_device_info) || |
1882 | !ims_pcu_device_info[pcu->device_id].keymap) { | |
1883 | dev_err(pcu->dev, "Device ID %d is not valid\n", pcu->device_id); | |
628329d5 DT |
1884 | /* Same as above, punt to userspace */ |
1885 | return 0; | |
1886 | } | |
1887 | ||
1888 | /* Device appears to be operable, complete initialization */ | |
939ffb17 | 1889 | pcu->device_no = atomic_inc_return(&device_no); |
628329d5 | 1890 | |
e5fcd269 AS |
1891 | /* |
1892 | * PCU-B devices, both GEN_1 and GEN_2 do not have OFN sensor | |
1893 | */ | |
1894 | if (pcu->device_id != IMS_PCU_PCU_B_DEVICE_ID) { | |
1895 | error = sysfs_create_group(&pcu->dev->kobj, | |
1896 | &ims_pcu_ofn_attr_group); | |
1897 | if (error) | |
1898 | return error; | |
1899 | } | |
1900 | ||
628329d5 DT |
1901 | error = ims_pcu_setup_backlight(pcu); |
1902 | if (error) | |
1903 | return error; | |
1904 | ||
e5fcd269 | 1905 | info = &ims_pcu_device_info[pcu->device_id]; |
628329d5 DT |
1906 | error = ims_pcu_setup_buttons(pcu, info->keymap, info->keymap_len); |
1907 | if (error) | |
1908 | goto err_destroy_backlight; | |
1909 | ||
1910 | if (info->has_gamepad) { | |
1911 | error = ims_pcu_setup_gamepad(pcu); | |
1912 | if (error) | |
1913 | goto err_destroy_buttons; | |
1914 | } | |
1915 | ||
1916 | pcu->setup_complete = true; | |
1917 | ||
1918 | return 0; | |
1919 | ||
628329d5 DT |
1920 | err_destroy_buttons: |
1921 | ims_pcu_destroy_buttons(pcu); | |
ad7647d9 DT |
1922 | err_destroy_backlight: |
1923 | ims_pcu_destroy_backlight(pcu); | |
628329d5 DT |
1924 | return error; |
1925 | } | |
1926 | ||
1927 | static void ims_pcu_destroy_application_mode(struct ims_pcu *pcu) | |
1928 | { | |
1929 | if (pcu->setup_complete) { | |
1930 | pcu->setup_complete = false; | |
1931 | mb(); /* make sure flag setting is not reordered */ | |
1932 | ||
1933 | if (pcu->gamepad) | |
1934 | ims_pcu_destroy_gamepad(pcu); | |
1935 | ims_pcu_destroy_buttons(pcu); | |
1936 | ims_pcu_destroy_backlight(pcu); | |
e5fcd269 AS |
1937 | |
1938 | if (pcu->device_id != IMS_PCU_PCU_B_DEVICE_ID) | |
1939 | sysfs_remove_group(&pcu->dev->kobj, | |
1940 | &ims_pcu_ofn_attr_group); | |
628329d5 DT |
1941 | } |
1942 | } | |
1943 | ||
1944 | static int ims_pcu_init_bootloader_mode(struct ims_pcu *pcu) | |
1945 | { | |
1946 | int error; | |
1947 | ||
1948 | error = ims_pcu_execute_bl_command(pcu, QUERY_DEVICE, NULL, 0, | |
1949 | IMS_PCU_CMD_RESPONSE_TIMEOUT); | |
1950 | if (error) { | |
1951 | dev_err(pcu->dev, "Bootloader does not respond, aborting\n"); | |
1952 | return error; | |
1953 | } | |
1954 | ||
1955 | pcu->fw_start_addr = | |
1956 | get_unaligned_le32(&pcu->cmd_buf[IMS_PCU_DATA_OFFSET + 11]); | |
1957 | pcu->fw_end_addr = | |
1958 | get_unaligned_le32(&pcu->cmd_buf[IMS_PCU_DATA_OFFSET + 15]); | |
1959 | ||
1960 | dev_info(pcu->dev, | |
1961 | "Device is in bootloader mode (addr 0x%08x-0x%08x), requesting firmware\n", | |
1962 | pcu->fw_start_addr, pcu->fw_end_addr); | |
1963 | ||
1964 | error = request_firmware_nowait(THIS_MODULE, true, | |
1965 | IMS_PCU_FIRMWARE_NAME, | |
1966 | pcu->dev, GFP_KERNEL, pcu, | |
1967 | ims_pcu_process_async_firmware); | |
1968 | if (error) { | |
1969 | /* This error is not fatal, let userspace have another chance */ | |
1970 | complete(&pcu->async_firmware_done); | |
1971 | } | |
1972 | ||
1973 | return 0; | |
1974 | } | |
1975 | ||
1976 | static void ims_pcu_destroy_bootloader_mode(struct ims_pcu *pcu) | |
1977 | { | |
1978 | /* Make sure our initial firmware request has completed */ | |
1979 | wait_for_completion(&pcu->async_firmware_done); | |
1980 | } | |
1981 | ||
1982 | #define IMS_PCU_APPLICATION_MODE 0 | |
1983 | #define IMS_PCU_BOOTLOADER_MODE 1 | |
1984 | ||
1985 | static struct usb_driver ims_pcu_driver; | |
1986 | ||
1987 | static int ims_pcu_probe(struct usb_interface *intf, | |
1988 | const struct usb_device_id *id) | |
1989 | { | |
1990 | struct usb_device *udev = interface_to_usbdev(intf); | |
1991 | struct ims_pcu *pcu; | |
1992 | int error; | |
1993 | ||
1994 | pcu = kzalloc(sizeof(struct ims_pcu), GFP_KERNEL); | |
1995 | if (!pcu) | |
1996 | return -ENOMEM; | |
1997 | ||
1998 | pcu->dev = &intf->dev; | |
1999 | pcu->udev = udev; | |
2000 | pcu->bootloader_mode = id->driver_info == IMS_PCU_BOOTLOADER_MODE; | |
2001 | mutex_init(&pcu->cmd_mutex); | |
2002 | init_completion(&pcu->cmd_done); | |
2003 | init_completion(&pcu->async_firmware_done); | |
2004 | ||
2005 | error = ims_pcu_parse_cdc_data(intf, pcu); | |
2006 | if (error) | |
2007 | goto err_free_mem; | |
2008 | ||
2009 | error = usb_driver_claim_interface(&ims_pcu_driver, | |
2010 | pcu->data_intf, pcu); | |
2011 | if (error) { | |
2012 | dev_err(&intf->dev, | |
2013 | "Unable to claim corresponding data interface: %d\n", | |
2014 | error); | |
2015 | goto err_free_mem; | |
2016 | } | |
2017 | ||
2018 | usb_set_intfdata(pcu->ctrl_intf, pcu); | |
2019 | usb_set_intfdata(pcu->data_intf, pcu); | |
2020 | ||
2021 | error = ims_pcu_buffers_alloc(pcu); | |
2022 | if (error) | |
2023 | goto err_unclaim_intf; | |
2024 | ||
2025 | error = ims_pcu_start_io(pcu); | |
2026 | if (error) | |
2027 | goto err_free_buffers; | |
2028 | ||
2029 | error = ims_pcu_line_setup(pcu); | |
2030 | if (error) | |
2031 | goto err_stop_io; | |
2032 | ||
2033 | error = sysfs_create_group(&intf->dev.kobj, &ims_pcu_attr_group); | |
2034 | if (error) | |
2035 | goto err_stop_io; | |
2036 | ||
2037 | error = pcu->bootloader_mode ? | |
2038 | ims_pcu_init_bootloader_mode(pcu) : | |
2039 | ims_pcu_init_application_mode(pcu); | |
2040 | if (error) | |
2041 | goto err_remove_sysfs; | |
2042 | ||
2043 | return 0; | |
2044 | ||
2045 | err_remove_sysfs: | |
2046 | sysfs_remove_group(&intf->dev.kobj, &ims_pcu_attr_group); | |
2047 | err_stop_io: | |
2048 | ims_pcu_stop_io(pcu); | |
2049 | err_free_buffers: | |
2050 | ims_pcu_buffers_free(pcu); | |
2051 | err_unclaim_intf: | |
2052 | usb_driver_release_interface(&ims_pcu_driver, pcu->data_intf); | |
2053 | err_free_mem: | |
2054 | kfree(pcu); | |
2055 | return error; | |
2056 | } | |
2057 | ||
2058 | static void ims_pcu_disconnect(struct usb_interface *intf) | |
2059 | { | |
2060 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
2061 | struct usb_host_interface *alt = intf->cur_altsetting; | |
2062 | ||
2063 | usb_set_intfdata(intf, NULL); | |
2064 | ||
2065 | /* | |
2066 | * See if we are dealing with control or data interface. The cleanup | |
2067 | * happens when we unbind primary (control) interface. | |
2068 | */ | |
2069 | if (alt->desc.bInterfaceClass != USB_CLASS_COMM) | |
2070 | return; | |
2071 | ||
2072 | sysfs_remove_group(&intf->dev.kobj, &ims_pcu_attr_group); | |
2073 | ||
2074 | ims_pcu_stop_io(pcu); | |
2075 | ||
2076 | if (pcu->bootloader_mode) | |
2077 | ims_pcu_destroy_bootloader_mode(pcu); | |
2078 | else | |
2079 | ims_pcu_destroy_application_mode(pcu); | |
2080 | ||
2081 | ims_pcu_buffers_free(pcu); | |
2082 | kfree(pcu); | |
2083 | } | |
2084 | ||
2085 | #ifdef CONFIG_PM | |
2086 | static int ims_pcu_suspend(struct usb_interface *intf, | |
2087 | pm_message_t message) | |
2088 | { | |
2089 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
2090 | struct usb_host_interface *alt = intf->cur_altsetting; | |
2091 | ||
2092 | if (alt->desc.bInterfaceClass == USB_CLASS_COMM) | |
2093 | ims_pcu_stop_io(pcu); | |
2094 | ||
2095 | return 0; | |
2096 | } | |
2097 | ||
2098 | static int ims_pcu_resume(struct usb_interface *intf) | |
2099 | { | |
2100 | struct ims_pcu *pcu = usb_get_intfdata(intf); | |
2101 | struct usb_host_interface *alt = intf->cur_altsetting; | |
2102 | int retval = 0; | |
2103 | ||
2104 | if (alt->desc.bInterfaceClass == USB_CLASS_COMM) { | |
2105 | retval = ims_pcu_start_io(pcu); | |
2106 | if (retval == 0) | |
2107 | retval = ims_pcu_line_setup(pcu); | |
2108 | } | |
2109 | ||
2110 | return retval; | |
2111 | } | |
2112 | #endif | |
2113 | ||
2114 | static const struct usb_device_id ims_pcu_id_table[] = { | |
2115 | { | |
2116 | USB_DEVICE_AND_INTERFACE_INFO(0x04d8, 0x0082, | |
2117 | USB_CLASS_COMM, | |
2118 | USB_CDC_SUBCLASS_ACM, | |
2119 | USB_CDC_ACM_PROTO_AT_V25TER), | |
2120 | .driver_info = IMS_PCU_APPLICATION_MODE, | |
2121 | }, | |
2122 | { | |
2123 | USB_DEVICE_AND_INTERFACE_INFO(0x04d8, 0x0083, | |
2124 | USB_CLASS_COMM, | |
2125 | USB_CDC_SUBCLASS_ACM, | |
2126 | USB_CDC_ACM_PROTO_AT_V25TER), | |
2127 | .driver_info = IMS_PCU_BOOTLOADER_MODE, | |
2128 | }, | |
2129 | { } | |
2130 | }; | |
2131 | ||
2132 | static struct usb_driver ims_pcu_driver = { | |
2133 | .name = "ims_pcu", | |
2134 | .id_table = ims_pcu_id_table, | |
2135 | .probe = ims_pcu_probe, | |
2136 | .disconnect = ims_pcu_disconnect, | |
2137 | #ifdef CONFIG_PM | |
2138 | .suspend = ims_pcu_suspend, | |
2139 | .resume = ims_pcu_resume, | |
2140 | .reset_resume = ims_pcu_resume, | |
2141 | #endif | |
2142 | }; | |
2143 | ||
2144 | module_usb_driver(ims_pcu_driver); | |
2145 | ||
2146 | MODULE_DESCRIPTION("IMS Passenger Control Unit driver"); | |
2147 | MODULE_AUTHOR("Dmitry Torokhov <dmitry.torokhov@gmail.com>"); | |
2148 | MODULE_LICENSE("GPL"); |