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1 | /* |
2 | * broadsheetfb.c -- FB driver for E-Ink Broadsheet controller |
3 | * |
4 | * Copyright (C) 2008, Jaya Kumar |
5 | * |
6 | * This file is subject to the terms and conditions of the GNU General Public |
7 | * License. See the file COPYING in the main directory of this archive for |
8 | * more details. |
9 | * |
10 | * Layout is based on skeletonfb.c by James Simmons and Geert Uytterhoeven. |
11 | * |
12 | * This driver is written to be used with the Broadsheet display controller. |
13 | * |
14 | * It is intended to be architecture independent. A board specific driver |
15 | * must be used to perform all the physical IO interactions. |
16 | * |
17 | */ |
18 | |
19 | #include <linux/module.h> |
20 | #include <linux/kernel.h> |
21 | #include <linux/errno.h> |
22 | #include <linux/string.h> |
23 | #include <linux/mm.h> |
24 | #include <linux/slab.h> |
25 | #include <linux/vmalloc.h> |
26 | #include <linux/delay.h> |
27 | #include <linux/interrupt.h> |
28 | #include <linux/fb.h> |
29 | #include <linux/init.h> |
30 | #include <linux/platform_device.h> |
31 | #include <linux/list.h> |
32 | #include <linux/firmware.h> |
33 | #include <linux/uaccess.h> |
34 | |
35 | #include <video/broadsheetfb.h> |
36 | |
37 | /* track panel specific parameters */ |
38 | struct panel_info { |
39 | int w; |
40 | int h; |
41 | u16 sdcfg; |
42 | u16 gdcfg; |
43 | u16 lutfmt; |
44 | u16 fsynclen; |
45 | u16 fendfbegin; |
46 | u16 lsynclen; |
47 | u16 lendlbegin; |
48 | u16 pixclk; |
49 | }; |
50 | |
51 | /* table of panel specific parameters to be indexed into by the board drivers */ |
52 | static struct panel_info panel_table[] = { |
53 | { /* standard 6" on TFT backplane */ |
54 | .w = 800, |
55 | .h = 600, |
56 | .sdcfg = (100 | (1 << 8) | (1 << 9)), |
57 | .gdcfg = 2, |
58 | .lutfmt = (4 | (1 << 7)), |
59 | .fsynclen = 4, |
60 | .fendfbegin = (10 << 8) | 4, |
61 | .lsynclen = 10, |
62 | .lendlbegin = (100 << 8) | 4, |
63 | .pixclk = 6, |
64 | }, |
65 | { /* custom 3.7" flexible on PET or steel */ |
66 | .w = 320, |
67 | .h = 240, |
68 | .sdcfg = (67 | (0 << 8) | (0 << 9) | (0 << 10) | (0 << 12)), |
69 | .gdcfg = 3, |
70 | .lutfmt = (4 | (1 << 7)), |
71 | .fsynclen = 0, |
72 | .fendfbegin = (80 << 8) | 4, |
73 | .lsynclen = 10, |
74 | .lendlbegin = (80 << 8) | 20, |
75 | .pixclk = 14, |
76 | }, |
77 | { /* standard 9.7" on TFT backplane */ |
78 | .w = 1200, |
79 | .h = 825, |
80 | .sdcfg = (100 | (1 << 8) | (1 << 9) | (0 << 10) | (0 << 12)), |
81 | .gdcfg = 2, |
82 | .lutfmt = (4 | (1 << 7)), |
83 | .fsynclen = 0, |
84 | .fendfbegin = (4 << 8) | 4, |
85 | .lsynclen = 4, |
86 | .lendlbegin = (60 << 8) | 10, |
87 | .pixclk = 3, |
88 | }, |
89 | }; |
90 | |
91 | #define DPY_W 800 |
92 | #define DPY_H 600 |
93 | |
94 | static struct fb_fix_screeninfo broadsheetfb_fix __devinitdata = { |
95 | .id = "broadsheetfb", |
96 | .type = FB_TYPE_PACKED_PIXELS, |
97 | .visual = FB_VISUAL_STATIC_PSEUDOCOLOR, |
98 | .xpanstep = 0, |
99 | .ypanstep = 0, |
100 | .ywrapstep = 0, |
101 | .line_length = DPY_W, |
102 | .accel = FB_ACCEL_NONE, |
103 | }; |
104 | |
105 | static struct fb_var_screeninfo broadsheetfb_var __devinitdata = { |
106 | .xres = DPY_W, |
107 | .yres = DPY_H, |
108 | .xres_virtual = DPY_W, |
109 | .yres_virtual = DPY_H, |
110 | .bits_per_pixel = 8, |
111 | .grayscale = 1, |
112 | .red = { 0, 4, 0 }, |
113 | .green = { 0, 4, 0 }, |
114 | .blue = { 0, 4, 0 }, |
115 | .transp = { 0, 0, 0 }, |
116 | }; |
117 | |
118 | /* main broadsheetfb functions */ |
119 | static void broadsheet_gpio_issue_data(struct broadsheetfb_par *par, u16 data) |
120 | { |
121 | par->board->set_ctl(par, BS_WR, 0); |
122 | par->board->set_hdb(par, data); |
123 | par->board->set_ctl(par, BS_WR, 1); |
124 | } |
125 | |
126 | static void broadsheet_gpio_issue_cmd(struct broadsheetfb_par *par, u16 data) |
127 | { |
128 | par->board->set_ctl(par, BS_DC, 0); |
129 | broadsheet_gpio_issue_data(par, data); |
130 | } |
131 | |
132 | static void broadsheet_gpio_send_command(struct broadsheetfb_par *par, u16 data) |
133 | { |
134 | par->board->wait_for_rdy(par); |
135 | |
136 | par->board->set_ctl(par, BS_CS, 0); |
137 | broadsheet_gpio_issue_cmd(par, data); |
138 | par->board->set_ctl(par, BS_DC, 1); |
139 | par->board->set_ctl(par, BS_CS, 1); |
140 | } |
141 | |
142 | static void broadsheet_gpio_send_cmdargs(struct broadsheetfb_par *par, u16 cmd, |
143 | int argc, u16 *argv) |
144 | { |
145 | int i; |
146 | |
147 | par->board->wait_for_rdy(par); |
148 | |
149 | par->board->set_ctl(par, BS_CS, 0); |
150 | broadsheet_gpio_issue_cmd(par, cmd); |
151 | par->board->set_ctl(par, BS_DC, 1); |
152 | |
153 | for (i = 0; i < argc; i++) |
154 | broadsheet_gpio_issue_data(par, argv[i]); |
155 | par->board->set_ctl(par, BS_CS, 1); |
156 | } |
157 | |
158 | static void broadsheet_mmio_send_cmdargs(struct broadsheetfb_par *par, u16 cmd, |
159 | int argc, u16 *argv) |
160 | { |
161 | int i; |
162 | |
163 | par->board->mmio_write(par, BS_MMIO_CMD, cmd); |
164 | |
165 | for (i = 0; i < argc; i++) |
166 | par->board->mmio_write(par, BS_MMIO_DATA, argv[i]); |
167 | } |
168 | |
169 | static void broadsheet_send_command(struct broadsheetfb_par *par, u16 data) |
170 | { |
171 | if (par->board->mmio_write) |
172 | par->board->mmio_write(par, BS_MMIO_CMD, data); |
173 | else |
174 | broadsheet_gpio_send_command(par, data); |
175 | } |
176 | |
177 | static void broadsheet_send_cmdargs(struct broadsheetfb_par *par, u16 cmd, |
178 | int argc, u16 *argv) |
179 | { |
180 | if (par->board->mmio_write) |
181 | broadsheet_mmio_send_cmdargs(par, cmd, argc, argv); |
182 | else |
183 | broadsheet_gpio_send_cmdargs(par, cmd, argc, argv); |
184 | } |
185 | |
186 | static void broadsheet_gpio_burst_write(struct broadsheetfb_par *par, int size, |
187 | u16 *data) |
188 | { |
189 | int i; |
190 | u16 tmp; |
191 | |
192 | par->board->set_ctl(par, BS_CS, 0); |
193 | par->board->set_ctl(par, BS_DC, 1); |
194 | |
195 | for (i = 0; i < size; i++) { |
196 | par->board->set_ctl(par, BS_WR, 0); |
197 | tmp = (data[i] & 0x0F) << 4; |
198 | tmp |= (data[i] & 0x0F00) << 4; |
199 | par->board->set_hdb(par, tmp); |
200 | par->board->set_ctl(par, BS_WR, 1); |
201 | } |
202 | |
203 | par->board->set_ctl(par, BS_CS, 1); |
204 | } |
205 | |
206 | static void broadsheet_mmio_burst_write(struct broadsheetfb_par *par, int size, |
207 | u16 *data) |
208 | { |
209 | int i; |
210 | u16 tmp; |
211 | |
212 | for (i = 0; i < size; i++) { |
213 | tmp = (data[i] & 0x0F) << 4; |
214 | tmp |= (data[i] & 0x0F00) << 4; |
215 | par->board->mmio_write(par, BS_MMIO_DATA, tmp); |
216 | } |
217 | |
218 | } |
219 | |
220 | static void broadsheet_burst_write(struct broadsheetfb_par *par, int size, |
221 | u16 *data) |
222 | { |
223 | if (par->board->mmio_write) |
224 | broadsheet_mmio_burst_write(par, size, data); |
225 | else |
226 | broadsheet_gpio_burst_write(par, size, data); |
227 | } |
228 | |
229 | static u16 broadsheet_gpio_get_data(struct broadsheetfb_par *par) |
230 | { |
231 | u16 res; |
232 | /* wait for ready to go hi. (lo is busy) */ |
233 | par->board->wait_for_rdy(par); |
234 | |
235 | /* cs lo, dc lo for cmd, we lo for each data, db as usual */ |
236 | par->board->set_ctl(par, BS_DC, 1); |
237 | par->board->set_ctl(par, BS_CS, 0); |
238 | par->board->set_ctl(par, BS_WR, 0); |
239 | |
240 | res = par->board->get_hdb(par); |
241 | |
242 | /* strobe wr */ |
243 | par->board->set_ctl(par, BS_WR, 1); |
244 | par->board->set_ctl(par, BS_CS, 1); |
245 | |
246 | return res; |
247 | } |
248 | |
249 | |
250 | static u16 broadsheet_get_data(struct broadsheetfb_par *par) |
251 | { |
252 | if (par->board->mmio_read) |
253 | return par->board->mmio_read(par); |
254 | else |
255 | return broadsheet_gpio_get_data(par); |
256 | } |
257 | |
258 | static void broadsheet_gpio_write_reg(struct broadsheetfb_par *par, u16 reg, |
259 | u16 data) |
260 | { |
261 | /* wait for ready to go hi. (lo is busy) */ |
262 | par->board->wait_for_rdy(par); |
263 | |
264 | /* cs lo, dc lo for cmd, we lo for each data, db as usual */ |
265 | par->board->set_ctl(par, BS_CS, 0); |
266 | |
267 | broadsheet_gpio_issue_cmd(par, BS_CMD_WR_REG); |
268 | |
269 | par->board->set_ctl(par, BS_DC, 1); |
270 | |
271 | broadsheet_gpio_issue_data(par, reg); |
272 | broadsheet_gpio_issue_data(par, data); |
273 | |
274 | par->board->set_ctl(par, BS_CS, 1); |
275 | } |
276 | |
277 | static void broadsheet_mmio_write_reg(struct broadsheetfb_par *par, u16 reg, |
278 | u16 data) |
279 | { |
280 | par->board->mmio_write(par, BS_MMIO_CMD, BS_CMD_WR_REG); |
281 | par->board->mmio_write(par, BS_MMIO_DATA, reg); |
282 | par->board->mmio_write(par, BS_MMIO_DATA, data); |
283 | |
284 | } |
285 | |
286 | static void broadsheet_write_reg(struct broadsheetfb_par *par, u16 reg, |
287 | u16 data) |
288 | { |
289 | if (par->board->mmio_write) |
290 | broadsheet_mmio_write_reg(par, reg, data); |
291 | else |
292 | broadsheet_gpio_write_reg(par, reg, data); |
293 | } |
294 | |
295 | static void broadsheet_write_reg32(struct broadsheetfb_par *par, u16 reg, |
296 | u32 data) |
297 | { |
298 | broadsheet_write_reg(par, reg, cpu_to_le32(data) & 0xFFFF); |
299 | broadsheet_write_reg(par, reg + 2, (cpu_to_le32(data) >> 16) & 0xFFFF); |
300 | } |
301 | |
302 | |
303 | static u16 broadsheet_read_reg(struct broadsheetfb_par *par, u16 reg) |
304 | { |
305 | broadsheet_send_cmdargs(par, BS_CMD_RD_REG, 1, ®); |
306 | par->board->wait_for_rdy(par); |
307 | return broadsheet_get_data(par); |
308 | } |
309 | |
310 | /* functions for waveform manipulation */ |
311 | static int is_broadsheet_pll_locked(struct broadsheetfb_par *par) |
312 | { |
313 | return broadsheet_read_reg(par, 0x000A) & 0x0001; |
314 | } |
315 | |
316 | static int broadsheet_setup_plls(struct broadsheetfb_par *par) |
317 | { |
318 | int retry_count = 0; |
319 | u16 tmp; |
320 | |
321 | /* disable arral saemipu mode */ |
322 | broadsheet_write_reg(par, 0x0006, 0x0000); |
323 | |
324 | broadsheet_write_reg(par, 0x0010, 0x0004); |
325 | broadsheet_write_reg(par, 0x0012, 0x5949); |
326 | broadsheet_write_reg(par, 0x0014, 0x0040); |
327 | broadsheet_write_reg(par, 0x0016, 0x0000); |
328 | |
329 | do { |
330 | if (retry_count++ > 100) |
331 | return -ETIMEDOUT; |
332 | mdelay(1); |
333 | } while (!is_broadsheet_pll_locked(par)); |
334 | |
335 | tmp = broadsheet_read_reg(par, 0x0006); |
336 | tmp &= ~0x1; |
337 | broadsheet_write_reg(par, 0x0006, tmp); |
338 | |
339 | return 0; |
340 | } |
341 | |
342 | static int broadsheet_setup_spi(struct broadsheetfb_par *par) |
343 | { |
344 | |
345 | broadsheet_write_reg(par, 0x0204, ((3 << 3) | 1)); |
346 | broadsheet_write_reg(par, 0x0208, 0x0001); |
347 | |
348 | return 0; |
349 | } |
350 | |
351 | static int broadsheet_setup_spiflash(struct broadsheetfb_par *par, |
352 | u16 *orig_sfmcd) |
353 | { |
354 | |
355 | *orig_sfmcd = broadsheet_read_reg(par, 0x0204); |
356 | broadsheet_write_reg(par, 0x0208, 0); |
357 | broadsheet_write_reg(par, 0x0204, 0); |
358 | broadsheet_write_reg(par, 0x0204, ((3 << 3) | 1)); |
359 | |
360 | return 0; |
361 | } |
362 | |
363 | static int broadsheet_spiflash_wait_for_bit(struct broadsheetfb_par *par, |
364 | u16 reg, int bitnum, int val, |
365 | int timeout) |
366 | { |
367 | u16 tmp; |
368 | |
369 | do { |
370 | tmp = broadsheet_read_reg(par, reg); |
371 | if (((tmp >> bitnum) & 1) == val) |
372 | return 0; |
373 | mdelay(1); |
374 | } while (timeout--); |
375 | |
376 | return -ETIMEDOUT; |
377 | } |
378 | |
379 | static int broadsheet_spiflash_write_byte(struct broadsheetfb_par *par, u8 data) |
380 | { |
381 | broadsheet_write_reg(par, 0x0202, (data | 0x100)); |
382 | |
383 | return broadsheet_spiflash_wait_for_bit(par, 0x0206, 3, 0, 100); |
384 | } |
385 | |
386 | static int broadsheet_spiflash_read_byte(struct broadsheetfb_par *par, u8 *data) |
387 | { |
388 | int err; |
389 | u16 tmp; |
390 | |
391 | broadsheet_write_reg(par, 0x0202, 0); |
392 | |
393 | err = broadsheet_spiflash_wait_for_bit(par, 0x0206, 3, 0, 100); |
394 | if (err) |
395 | return err; |
396 | |
397 | tmp = broadsheet_read_reg(par, 0x200); |
398 | |
399 | *data = tmp & 0xFF; |
400 | |
401 | return 0; |
402 | } |
403 | |
404 | static int broadsheet_spiflash_wait_for_status(struct broadsheetfb_par *par, |
405 | int timeout) |
406 | { |
407 | u8 tmp; |
408 | int err; |
409 | |
410 | do { |
411 | broadsheet_write_reg(par, 0x0208, 1); |
412 | |
413 | err = broadsheet_spiflash_write_byte(par, 0x05); |
414 | if (err) |
415 | goto failout; |
416 | |
417 | err = broadsheet_spiflash_read_byte(par, &tmp); |
418 | if (err) |
419 | goto failout; |
420 | |
421 | broadsheet_write_reg(par, 0x0208, 0); |
422 | |
423 | if (!(tmp & 0x1)) |
424 | return 0; |
425 | |
426 | mdelay(5); |
427 | } while (timeout--); |
428 | |
429 | dev_err(par->info->device, "Timed out waiting for spiflash status\n"); |
430 | return -ETIMEDOUT; |
431 | |
432 | failout: |
433 | broadsheet_write_reg(par, 0x0208, 0); |
434 | return err; |
435 | } |
436 | |
437 | static int broadsheet_spiflash_op_on_address(struct broadsheetfb_par *par, |
438 | u8 op, u32 addr) |
439 | { |
440 | int i; |
441 | u8 tmp; |
442 | int err; |
443 | |
444 | broadsheet_write_reg(par, 0x0208, 1); |
445 | |
446 | err = broadsheet_spiflash_write_byte(par, op); |
447 | if (err) |
448 | return err; |
449 | |
450 | for (i = 2; i >= 0; i--) { |
451 | tmp = ((addr >> (i * 8)) & 0xFF); |
452 | err = broadsheet_spiflash_write_byte(par, tmp); |
453 | if (err) |
454 | return err; |
455 | } |
456 | |
457 | return err; |
458 | } |
459 | |
460 | static int broadsheet_verify_spiflash(struct broadsheetfb_par *par, |
461 | int *flash_type) |
462 | { |
463 | int err = 0; |
464 | u8 sig; |
465 | |
466 | err = broadsheet_spiflash_op_on_address(par, 0xAB, 0x00000000); |
467 | if (err) |
468 | goto failout; |
469 | |
470 | err = broadsheet_spiflash_read_byte(par, &sig); |
471 | if (err) |
472 | goto failout; |
473 | |
474 | if ((sig != 0x10) && (sig != 0x11)) { |
475 | dev_err(par->info->device, "Unexpected flash type\n"); |
476 | err = -EINVAL; |
477 | goto failout; |
478 | } |
479 | |
480 | *flash_type = sig; |
481 | |
482 | failout: |
483 | broadsheet_write_reg(par, 0x0208, 0); |
484 | return err; |
485 | } |
486 | |
487 | static int broadsheet_setup_for_wfm_write(struct broadsheetfb_par *par, |
488 | u16 *initial_sfmcd, int *flash_type) |
489 | |
490 | { |
491 | int err; |
492 | |
493 | err = broadsheet_setup_plls(par); |
494 | if (err) |
495 | return err; |
496 | |
497 | broadsheet_write_reg(par, 0x0106, 0x0203); |
498 | |
499 | err = broadsheet_setup_spi(par); |
500 | if (err) |
501 | return err; |
502 | |
503 | err = broadsheet_setup_spiflash(par, initial_sfmcd); |
504 | if (err) |
505 | return err; |
506 | |
507 | return broadsheet_verify_spiflash(par, flash_type); |
508 | } |
509 | |
510 | static int broadsheet_spiflash_write_control(struct broadsheetfb_par *par, |
511 | int mode) |
512 | { |
513 | int err; |
514 | |
515 | broadsheet_write_reg(par, 0x0208, 1); |
516 | if (mode) |
517 | err = broadsheet_spiflash_write_byte(par, 0x06); |
518 | else |
519 | err = broadsheet_spiflash_write_byte(par, 0x04); |
520 | |
521 | broadsheet_write_reg(par, 0x0208, 0); |
522 | return err; |
523 | } |
524 | |
525 | static int broadsheet_spiflash_erase_sector(struct broadsheetfb_par *par, |
526 | int addr) |
527 | { |
528 | int err; |
529 | |
530 | broadsheet_spiflash_write_control(par, 1); |
531 | |
532 | err = broadsheet_spiflash_op_on_address(par, 0xD8, addr); |
533 | |
534 | broadsheet_write_reg(par, 0x0208, 0); |
535 | |
536 | if (err) |
537 | return err; |
538 | |
539 | err = broadsheet_spiflash_wait_for_status(par, 1000); |
540 | |
541 | return err; |
542 | } |
543 | |
544 | static int broadsheet_spiflash_read_range(struct broadsheetfb_par *par, |
545 | int addr, int size, char *data) |
546 | { |
547 | int err; |
548 | int i; |
549 | |
550 | err = broadsheet_spiflash_op_on_address(par, 0x03, addr); |
551 | if (err) |
552 | goto failout; |
553 | |
554 | for (i = 0; i < size; i++) { |
555 | err = broadsheet_spiflash_read_byte(par, &data[i]); |
556 | if (err) |
557 | goto failout; |
558 | } |
559 | |
560 | failout: |
561 | broadsheet_write_reg(par, 0x0208, 0); |
562 | return err; |
563 | } |
564 | |
565 | #define BS_SPIFLASH_PAGE_SIZE 256 |
566 | static int broadsheet_spiflash_write_page(struct broadsheetfb_par *par, |
567 | int addr, const char *data) |
568 | { |
569 | int err; |
570 | int i; |
571 | |
572 | broadsheet_spiflash_write_control(par, 1); |
573 | |
574 | err = broadsheet_spiflash_op_on_address(par, 0x02, addr); |
575 | if (err) |
576 | goto failout; |
577 | |
578 | for (i = 0; i < BS_SPIFLASH_PAGE_SIZE; i++) { |
579 | err = broadsheet_spiflash_write_byte(par, data[i]); |
580 | if (err) |
581 | goto failout; |
582 | } |
583 | |
584 | broadsheet_write_reg(par, 0x0208, 0); |
585 | |
586 | err = broadsheet_spiflash_wait_for_status(par, 100); |
587 | |
588 | failout: |
589 | return err; |
590 | } |
591 | |
592 | static int broadsheet_spiflash_write_sector(struct broadsheetfb_par *par, |
593 | int addr, const char *data, int sector_size) |
594 | { |
595 | int i; |
596 | int err; |
597 | |
598 | for (i = 0; i < sector_size; i += BS_SPIFLASH_PAGE_SIZE) { |
599 | err = broadsheet_spiflash_write_page(par, addr + i, &data[i]); |
600 | if (err) |
601 | return err; |
602 | } |
603 | return 0; |
604 | } |
605 | |
606 | /* |
607 | * The caller must guarantee that the data to be rewritten is entirely |
608 | * contained within this sector. That is, data_start_addr + data_len |
609 | * must be less than sector_start_addr + sector_size. |
610 | */ |
611 | static int broadsheet_spiflash_rewrite_sector(struct broadsheetfb_par *par, |
612 | int sector_size, int data_start_addr, |
613 | int data_len, const char *data) |
614 | { |
615 | int err; |
616 | char *sector_buffer; |
617 | int tail_start_addr; |
618 | int start_sector_addr; |
619 | |
620 | sector_buffer = kzalloc(sizeof(char)*sector_size, GFP_KERNEL); |
621 | if (!sector_buffer) |
622 | return -ENOMEM; |
623 | |
624 | /* the start address of the sector is the 0th byte of that sector */ |
625 | start_sector_addr = (data_start_addr / sector_size) * sector_size; |
626 | |
627 | /* |
628 | * check if there is head data that we need to readback into our sector |
629 | * buffer first |
630 | */ |
631 | if (data_start_addr != start_sector_addr) { |
632 | /* |
633 | * we need to read every byte up till the start address of our |
634 | * data and we put it into our sector buffer. |
635 | */ |
636 | err = broadsheet_spiflash_read_range(par, start_sector_addr, |
637 | data_start_addr, sector_buffer); |
638 | if (err) |
639 | return err; |
640 | } |
641 | |
642 | /* now we copy our data into the right place in the sector buffer */ |
643 | memcpy(sector_buffer + data_start_addr, data, data_len); |
644 | |
645 | /* |
646 | * now we check if there is a tail section of the sector that we need to |
647 | * readback. |
648 | */ |
649 | tail_start_addr = (data_start_addr + data_len) % sector_size; |
650 | |
651 | if (tail_start_addr) { |
652 | int tail_len; |
653 | |
654 | tail_len = sector_size - tail_start_addr; |
655 | |
656 | /* now we read this tail into our sector buffer */ |
657 | err = broadsheet_spiflash_read_range(par, tail_start_addr, |
658 | tail_len, sector_buffer + tail_start_addr); |
659 | if (err) |
660 | return err; |
661 | } |
662 | |
663 | /* if we got here we have the full sector that we want to rewrite. */ |
664 | |
665 | /* first erase the sector */ |
666 | err = broadsheet_spiflash_erase_sector(par, start_sector_addr); |
667 | if (err) |
668 | return err; |
669 | |
670 | /* now write it */ |
671 | err = broadsheet_spiflash_write_sector(par, start_sector_addr, |
672 | sector_buffer, sector_size); |
673 | return err; |
674 | } |
675 | |
676 | static int broadsheet_write_spiflash(struct broadsheetfb_par *par, u32 wfm_addr, |
677 | const u8 *wfm, int bytecount, int flash_type) |
678 | { |
679 | int sector_size; |
680 | int err; |
681 | int cur_addr; |
682 | int writecount; |
683 | int maxlen; |
684 | int offset = 0; |
685 | |
686 | switch (flash_type) { |
687 | case 0x10: |
688 | sector_size = 32*1024; |
689 | break; |
690 | case 0x11: |
691 | default: |
692 | sector_size = 64*1024; |
693 | break; |
694 | } |
695 | |
696 | while (bytecount) { |
697 | cur_addr = wfm_addr + offset; |
698 | maxlen = roundup(cur_addr, sector_size) - cur_addr; |
699 | writecount = min(bytecount, maxlen); |
700 | |
701 | err = broadsheet_spiflash_rewrite_sector(par, sector_size, |
702 | cur_addr, writecount, wfm + offset); |
703 | if (err) |
704 | return err; |
705 | |
706 | offset += writecount; |
707 | bytecount -= writecount; |
708 | } |
709 | |
710 | return 0; |
711 | } |
712 | |
713 | static int broadsheet_store_waveform_to_spiflash(struct broadsheetfb_par *par, |
714 | const u8 *wfm, size_t wfm_size) |
715 | { |
716 | int err = 0; |
717 | u16 initial_sfmcd = 0; |
718 | int flash_type = 0; |
719 | |
720 | err = broadsheet_setup_for_wfm_write(par, &initial_sfmcd, &flash_type); |
721 | if (err) |
722 | goto failout; |
723 | |
724 | err = broadsheet_write_spiflash(par, 0x886, wfm, wfm_size, flash_type); |
725 | |
726 | failout: |
727 | broadsheet_write_reg(par, 0x0204, initial_sfmcd); |
728 | return err; |
729 | } |
730 | |
731 | static ssize_t broadsheet_loadstore_waveform(struct device *dev, |
732 | struct device_attribute *attr, |
733 | const char *buf, size_t len) |
734 | { |
735 | int err; |
736 | struct fb_info *info = dev_get_drvdata(dev); |
737 | struct broadsheetfb_par *par = info->par; |
738 | const struct firmware *fw_entry; |
739 | |
740 | if (len < 1) |
741 | return -EINVAL; |
742 | |
743 | err = request_firmware(&fw_entry, "broadsheet.wbf", dev); |
744 | if (err < 0) { |
745 | dev_err(dev, "Failed to get broadsheet waveform\n"); |
746 | goto err_failed; |
747 | } |
748 | |
749 | /* try to enforce reasonable min max on waveform */ |
750 | if ((fw_entry->size < 8*1024) || (fw_entry->size > 64*1024)) { |
751 | dev_err(dev, "Invalid waveform\n"); |
752 | err = -EINVAL; |
753 | goto err_failed; |
754 | } |
755 | |
756 | mutex_lock(&(par->io_lock)); |
757 | err = broadsheet_store_waveform_to_spiflash(par, fw_entry->data, |
758 | fw_entry->size); |
759 | |
760 | mutex_unlock(&(par->io_lock)); |
761 | if (err < 0) { |
762 | dev_err(dev, "Failed to store broadsheet waveform\n"); |
763 | goto err_failed; |
764 | } |
765 | |
766 | dev_info(dev, "Stored broadsheet waveform, size %zd\n", fw_entry->size); |
767 | |
768 | return len; |
769 | |
770 | err_failed: |
771 | return err; |
772 | } |
773 | static DEVICE_ATTR(loadstore_waveform, S_IWUSR, NULL, |
774 | broadsheet_loadstore_waveform); |
775 | |
776 | /* upper level functions that manipulate the display and other stuff */ |
777 | static void __devinit broadsheet_init_display(struct broadsheetfb_par *par) |
778 | { |
779 | u16 args[5]; |
780 | int xres = par->info->var.xres; |
781 | int yres = par->info->var.yres; |
782 | |
783 | args[0] = panel_table[par->panel_index].w; |
784 | args[1] = panel_table[par->panel_index].h; |
785 | args[2] = panel_table[par->panel_index].sdcfg; |
786 | args[3] = panel_table[par->panel_index].gdcfg; |
787 | args[4] = panel_table[par->panel_index].lutfmt; |
788 | broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_CFG, 5, args); |
789 | |
790 | /* did the controller really set it? */ |
791 | broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_CFG, 5, args); |
792 | |
793 | args[0] = panel_table[par->panel_index].fsynclen; |
794 | args[1] = panel_table[par->panel_index].fendfbegin; |
795 | args[2] = panel_table[par->panel_index].lsynclen; |
796 | args[3] = panel_table[par->panel_index].lendlbegin; |
797 | args[4] = panel_table[par->panel_index].pixclk; |
798 | broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_TMG, 5, args); |
799 | |
800 | broadsheet_write_reg32(par, 0x310, xres*yres*2); |
801 | |
802 | /* setup waveform */ |
803 | args[0] = 0x886; |
804 | args[1] = 0; |
805 | broadsheet_send_cmdargs(par, BS_CMD_RD_WFM_INFO, 2, args); |
806 | |
807 | broadsheet_send_command(par, BS_CMD_UPD_GDRV_CLR); |
808 | |
809 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
810 | |
811 | broadsheet_write_reg(par, 0x330, 0x84); |
812 | |
813 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
814 | |
815 | args[0] = (0x3 << 4); |
816 | broadsheet_send_cmdargs(par, BS_CMD_LD_IMG, 1, args); |
817 | |
818 | args[0] = 0x154; |
819 | broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); |
820 | |
821 | broadsheet_burst_write(par, (panel_table[par->panel_index].w * |
822 | panel_table[par->panel_index].h)/2, |
823 | (u16 *) par->info->screen_base); |
824 | |
825 | broadsheet_send_command(par, BS_CMD_LD_IMG_END); |
826 | |
827 | args[0] = 0x4300; |
828 | broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); |
829 | |
830 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
831 | |
832 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); |
833 | |
834 | par->board->wait_for_rdy(par); |
835 | } |
836 | |
837 | static void __devinit broadsheet_identify(struct broadsheetfb_par *par) |
838 | { |
839 | u16 rev, prc; |
840 | struct device *dev = par->info->device; |
841 | |
842 | rev = broadsheet_read_reg(par, BS_REG_REV); |
843 | prc = broadsheet_read_reg(par, BS_REG_PRC); |
844 | dev_info(dev, "Broadsheet Rev 0x%x, Product Code 0x%x\n", rev, prc); |
845 | |
846 | if (prc != 0x0047) |
847 | dev_warn(dev, "Unrecognized Broadsheet Product Code\n"); |
848 | if (rev != 0x0100) |
849 | dev_warn(dev, "Unrecognized Broadsheet Revision\n"); |
850 | } |
851 | |
852 | static void __devinit broadsheet_init(struct broadsheetfb_par *par) |
853 | { |
854 | broadsheet_send_command(par, BS_CMD_INIT_SYS_RUN); |
855 | /* the controller needs a second */ |
856 | msleep(1000); |
857 | broadsheet_init_display(par); |
858 | } |
859 | |
860 | static void broadsheetfb_dpy_update_pages(struct broadsheetfb_par *par, |
861 | u16 y1, u16 y2) |
862 | { |
863 | u16 args[5]; |
864 | unsigned char *buf = (unsigned char *)par->info->screen_base; |
865 | |
866 | mutex_lock(&(par->io_lock)); |
867 | /* y1 must be a multiple of 4 so drop the lower bits */ |
868 | y1 &= 0xFFFC; |
869 | /* y2 must be a multiple of 4 , but - 1 so up the lower bits */ |
870 | y2 |= 0x0003; |
871 | |
872 | args[0] = 0x3 << 4; |
873 | args[1] = 0; |
874 | args[2] = y1; |
875 | args[3] = cpu_to_le16(par->info->var.xres); |
876 | args[4] = y2; |
877 | broadsheet_send_cmdargs(par, BS_CMD_LD_IMG_AREA, 5, args); |
878 | |
879 | args[0] = 0x154; |
880 | broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); |
881 | |
882 | buf += y1 * par->info->var.xres; |
883 | broadsheet_burst_write(par, ((1 + y2 - y1) * par->info->var.xres)/2, |
884 | (u16 *) buf); |
885 | |
886 | broadsheet_send_command(par, BS_CMD_LD_IMG_END); |
887 | |
888 | args[0] = 0x4300; |
889 | broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); |
890 | |
891 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
892 | |
893 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); |
894 | |
895 | par->board->wait_for_rdy(par); |
896 | mutex_unlock(&(par->io_lock)); |
897 | |
898 | } |
899 | |
900 | static void broadsheetfb_dpy_update(struct broadsheetfb_par *par) |
901 | { |
902 | u16 args[5]; |
903 | |
904 | mutex_lock(&(par->io_lock)); |
905 | args[0] = 0x3 << 4; |
906 | broadsheet_send_cmdargs(par, BS_CMD_LD_IMG, 1, args); |
907 | |
908 | args[0] = 0x154; |
909 | broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); |
910 | broadsheet_burst_write(par, (panel_table[par->panel_index].w * |
911 | panel_table[par->panel_index].h)/2, |
912 | (u16 *) par->info->screen_base); |
913 | |
914 | broadsheet_send_command(par, BS_CMD_LD_IMG_END); |
915 | |
916 | args[0] = 0x4300; |
917 | broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); |
918 | |
919 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
920 | |
921 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); |
922 | |
923 | par->board->wait_for_rdy(par); |
924 | mutex_unlock(&(par->io_lock)); |
925 | } |
926 | |
927 | /* this is called back from the deferred io workqueue */ |
928 | static void broadsheetfb_dpy_deferred_io(struct fb_info *info, |
929 | struct list_head *pagelist) |
930 | { |
931 | u16 y1 = 0, h = 0; |
932 | int prev_index = -1; |
933 | struct page *cur; |
934 | struct fb_deferred_io *fbdefio = info->fbdefio; |
935 | int h_inc; |
936 | u16 yres = info->var.yres; |
937 | u16 xres = info->var.xres; |
938 | |
939 | /* height increment is fixed per page */ |
940 | h_inc = DIV_ROUND_UP(PAGE_SIZE , xres); |
941 | |
942 | /* walk the written page list and swizzle the data */ |
943 | list_for_each_entry(cur, &fbdefio->pagelist, lru) { |
944 | if (prev_index < 0) { |
945 | /* just starting so assign first page */ |
946 | y1 = (cur->index << PAGE_SHIFT) / xres; |
947 | h = h_inc; |
948 | } else if ((prev_index + 1) == cur->index) { |
949 | /* this page is consecutive so increase our height */ |
950 | h += h_inc; |
951 | } else { |
952 | /* page not consecutive, issue previous update first */ |
953 | broadsheetfb_dpy_update_pages(info->par, y1, y1 + h); |
954 | /* start over with our non consecutive page */ |
955 | y1 = (cur->index << PAGE_SHIFT) / xres; |
956 | h = h_inc; |
957 | } |
958 | prev_index = cur->index; |
959 | } |
960 | |
961 | /* if we still have any pages to update we do so now */ |
962 | if (h >= yres) { |
963 | /* its a full screen update, just do it */ |
964 | broadsheetfb_dpy_update(info->par); |
965 | } else { |
966 | broadsheetfb_dpy_update_pages(info->par, y1, |
967 | min((u16) (y1 + h), yres)); |
968 | } |
969 | } |
970 | |
971 | static void broadsheetfb_fillrect(struct fb_info *info, |
972 | const struct fb_fillrect *rect) |
973 | { |
974 | struct broadsheetfb_par *par = info->par; |
975 | |
976 | sys_fillrect(info, rect); |
977 | |
978 | broadsheetfb_dpy_update(par); |
979 | } |
980 | |
981 | static void broadsheetfb_copyarea(struct fb_info *info, |
982 | const struct fb_copyarea *area) |
983 | { |
984 | struct broadsheetfb_par *par = info->par; |
985 | |
986 | sys_copyarea(info, area); |
987 | |
988 | broadsheetfb_dpy_update(par); |
989 | } |
990 | |
991 | static void broadsheetfb_imageblit(struct fb_info *info, |
992 | const struct fb_image *image) |
993 | { |
994 | struct broadsheetfb_par *par = info->par; |
995 | |
996 | sys_imageblit(info, image); |
997 | |
998 | broadsheetfb_dpy_update(par); |
999 | } |
1000 | |
1001 | /* |
1002 | * this is the slow path from userspace. they can seek and write to |
1003 | * the fb. it's inefficient to do anything less than a full screen draw |
1004 | */ |
1005 | static ssize_t broadsheetfb_write(struct fb_info *info, const char __user *buf, |
1006 | size_t count, loff_t *ppos) |
1007 | { |
1008 | struct broadsheetfb_par *par = info->par; |
1009 | unsigned long p = *ppos; |
1010 | void *dst; |
1011 | int err = 0; |
1012 | unsigned long total_size; |
1013 | |
1014 | if (info->state != FBINFO_STATE_RUNNING) |
1015 | return -EPERM; |
1016 | |
1017 | total_size = info->fix.smem_len; |
1018 | |
1019 | if (p > total_size) |
1020 | return -EFBIG; |
1021 | |
1022 | if (count > total_size) { |
1023 | err = -EFBIG; |
1024 | count = total_size; |
1025 | } |
1026 | |
1027 | if (count + p > total_size) { |
1028 | if (!err) |
1029 | err = -ENOSPC; |
1030 | |
1031 | count = total_size - p; |
1032 | } |
1033 | |
1034 | dst = (void *)(info->screen_base + p); |
1035 | |
1036 | if (copy_from_user(dst, buf, count)) |
1037 | err = -EFAULT; |
1038 | |
1039 | if (!err) |
1040 | *ppos += count; |
1041 | |
1042 | broadsheetfb_dpy_update(par); |
1043 | |
1044 | return (err) ? err : count; |
1045 | } |
1046 | |
1047 | static struct fb_ops broadsheetfb_ops = { |
1048 | .owner = THIS_MODULE, |
1049 | .fb_read = fb_sys_read, |
1050 | .fb_write = broadsheetfb_write, |
1051 | .fb_fillrect = broadsheetfb_fillrect, |
1052 | .fb_copyarea = broadsheetfb_copyarea, |
1053 | .fb_imageblit = broadsheetfb_imageblit, |
1054 | }; |
1055 | |
1056 | static struct fb_deferred_io broadsheetfb_defio = { |
1057 | .delay = HZ/4, |
1058 | .deferred_io = broadsheetfb_dpy_deferred_io, |
1059 | }; |
1060 | |
1061 | static int __devinit broadsheetfb_probe(struct platform_device *dev) |
1062 | { |
1063 | struct fb_info *info; |
1064 | struct broadsheet_board *board; |
1065 | int retval = -ENOMEM; |
1066 | int videomemorysize; |
1067 | unsigned char *videomemory; |
1068 | struct broadsheetfb_par *par; |
1069 | int i; |
1070 | int dpyw, dpyh; |
1071 | int panel_index; |
1072 | |
1073 | /* pick up board specific routines */ |
1074 | board = dev->dev.platform_data; |
1075 | if (!board) |
1076 | return -EINVAL; |
1077 | |
1078 | /* try to count device specific driver, if can't, platform recalls */ |
1079 | if (!try_module_get(board->owner)) |
1080 | return -ENODEV; |
1081 | |
1082 | info = framebuffer_alloc(sizeof(struct broadsheetfb_par), &dev->dev); |
1083 | if (!info) |
1084 | goto err; |
1085 | |
1086 | switch (board->get_panel_type()) { |
1087 | case 37: |
1088 | panel_index = 1; |
1089 | break; |
1090 | case 97: |
1091 | panel_index = 2; |
1092 | break; |
1093 | case 6: |
1094 | default: |
1095 | panel_index = 0; |
1096 | break; |
1097 | } |
1098 | |
1099 | dpyw = panel_table[panel_index].w; |
1100 | dpyh = panel_table[panel_index].h; |
1101 | |
1102 | videomemorysize = roundup((dpyw*dpyh), PAGE_SIZE); |
1103 | |
1104 | videomemory = vmalloc(videomemorysize); |
1105 | if (!videomemory) |
1106 | goto err_fb_rel; |
1107 | |
1108 | memset(videomemory, 0, videomemorysize); |
1109 | |
1110 | info->screen_base = (char *)videomemory; |
1111 | info->fbops = &broadsheetfb_ops; |
1112 | |
1113 | broadsheetfb_var.xres = dpyw; |
1114 | broadsheetfb_var.yres = dpyh; |
1115 | broadsheetfb_var.xres_virtual = dpyw; |
1116 | broadsheetfb_var.yres_virtual = dpyh; |
1117 | info->var = broadsheetfb_var; |
1118 | |
1119 | broadsheetfb_fix.line_length = dpyw; |
1120 | info->fix = broadsheetfb_fix; |
1121 | info->fix.smem_len = videomemorysize; |
1122 | par = info->par; |
1123 | par->panel_index = panel_index; |
1124 | par->info = info; |
1125 | par->board = board; |
1126 | par->write_reg = broadsheet_write_reg; |
1127 | par->read_reg = broadsheet_read_reg; |
1128 | init_waitqueue_head(&par->waitq); |
1129 | |
1130 | mutex_init(&par->io_lock); |
1131 | |
1132 | info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB; |
1133 | |
1134 | info->fbdefio = &broadsheetfb_defio; |
1135 | fb_deferred_io_init(info); |
1136 | |
1137 | retval = fb_alloc_cmap(&info->cmap, 16, 0); |
1138 | if (retval < 0) { |
1139 | dev_err(&dev->dev, "Failed to allocate colormap\n"); |
1140 | goto err_vfree; |
1141 | } |
1142 | |
1143 | /* set cmap */ |
1144 | for (i = 0; i < 16; i++) |
1145 | info->cmap.red[i] = (((2*i)+1)*(0xFFFF))/32; |
1146 | memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*16); |
1147 | memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*16); |
1148 | |
1149 | retval = par->board->setup_irq(info); |
1150 | if (retval < 0) |
1151 | goto err_cmap; |
1152 | |
1153 | /* this inits the dpy */ |
1154 | retval = board->init(par); |
1155 | if (retval < 0) |
1156 | goto err_free_irq; |
1157 | |
1158 | broadsheet_identify(par); |
1159 | |
1160 | broadsheet_init(par); |
1161 | |
1162 | retval = register_framebuffer(info); |
1163 | if (retval < 0) |
1164 | goto err_free_irq; |
1165 | |
1166 | platform_set_drvdata(dev, info); |
1167 | |
1168 | retval = device_create_file(&dev->dev, &dev_attr_loadstore_waveform); |
1169 | if (retval < 0) |
1170 | goto err_unreg_fb; |
1171 | |
1172 | printk(KERN_INFO |
1173 | "fb%d: Broadsheet frame buffer, using %dK of video memory\n", |
1174 | info->node, videomemorysize >> 10); |
1175 | |
1176 | |
1177 | return 0; |
1178 | |
1179 | err_unreg_fb: |
1180 | unregister_framebuffer(info); |
1181 | err_free_irq: |
1182 | board->cleanup(par); |
1183 | err_cmap: |
1184 | fb_dealloc_cmap(&info->cmap); |
1185 | err_vfree: |
1186 | vfree(videomemory); |
1187 | err_fb_rel: |
1188 | framebuffer_release(info); |
1189 | err: |
1190 | module_put(board->owner); |
1191 | return retval; |
1192 | |
1193 | } |
1194 | |
1195 | static int __devexit broadsheetfb_remove(struct platform_device *dev) |
1196 | { |
1197 | struct fb_info *info = platform_get_drvdata(dev); |
1198 | |
1199 | if (info) { |
1200 | struct broadsheetfb_par *par = info->par; |
1201 | |
1202 | device_remove_file(info->dev, &dev_attr_loadstore_waveform); |
1203 | unregister_framebuffer(info); |
1204 | fb_deferred_io_cleanup(info); |
1205 | par->board->cleanup(par); |
1206 | fb_dealloc_cmap(&info->cmap); |
1207 | vfree((void *)info->screen_base); |
1208 | module_put(par->board->owner); |
1209 | framebuffer_release(info); |
1210 | } |
1211 | return 0; |
1212 | } |
1213 | |
1214 | static struct platform_driver broadsheetfb_driver = { |
1215 | .probe = broadsheetfb_probe, |
1216 | .remove = broadsheetfb_remove, |
1217 | .driver = { |
1218 | .owner = THIS_MODULE, |
1219 | .name = "broadsheetfb", |
1220 | }, |
1221 | }; |
1222 | |
1223 | static int __init broadsheetfb_init(void) |
1224 | { |
1225 | return platform_driver_register(&broadsheetfb_driver); |
1226 | } |
1227 | |
1228 | static void __exit broadsheetfb_exit(void) |
1229 | { |
1230 | platform_driver_unregister(&broadsheetfb_driver); |
1231 | } |
1232 | |
1233 | module_init(broadsheetfb_init); |
1234 | module_exit(broadsheetfb_exit); |
1235 | |
1236 | MODULE_DESCRIPTION("fbdev driver for Broadsheet controller"); |
1237 | MODULE_AUTHOR("Jaya Kumar"); |
1238 | MODULE_LICENSE("GPL"); |
1239 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9