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 = { |
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 = { |
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, data: cmd); |
151 | par->board->set_ctl(par, BS_DC, 1); |
152 | |
153 | for (i = 0; i < argc; i++) |
154 | broadsheet_gpio_issue_data(par, data: 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, data: 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: reg + 2, data: (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, argc: 1, argv: ®); |
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, reg: 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, reg: 0x0006, data: 0x0000); |
323 | |
324 | broadsheet_write_reg(par, reg: 0x0010, data: 0x0004); |
325 | broadsheet_write_reg(par, reg: 0x0012, data: 0x5949); |
326 | broadsheet_write_reg(par, reg: 0x0014, data: 0x0040); |
327 | broadsheet_write_reg(par, reg: 0x0016, data: 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, reg: 0x0006); |
336 | tmp &= ~0x1; |
337 | broadsheet_write_reg(par, reg: 0x0006, data: tmp); |
338 | |
339 | return 0; |
340 | } |
341 | |
342 | static int broadsheet_setup_spi(struct broadsheetfb_par *par) |
343 | { |
344 | |
345 | broadsheet_write_reg(par, reg: 0x0204, data: ((3 << 3) | 1)); |
346 | broadsheet_write_reg(par, reg: 0x0208, data: 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, reg: 0x0204); |
356 | broadsheet_write_reg(par, reg: 0x0208, data: 0); |
357 | broadsheet_write_reg(par, reg: 0x0204, data: 0); |
358 | broadsheet_write_reg(par, reg: 0x0204, data: ((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, reg: 0x0202, data: (data | 0x100)); |
382 | |
383 | return broadsheet_spiflash_wait_for_bit(par, reg: 0x0206, bitnum: 3, val: 0, timeout: 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, reg: 0x0202, data: 0); |
392 | |
393 | err = broadsheet_spiflash_wait_for_bit(par, reg: 0x0206, bitnum: 3, val: 0, timeout: 100); |
394 | if (err) |
395 | return err; |
396 | |
397 | tmp = broadsheet_read_reg(par, reg: 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, reg: 0x0208, data: 1); |
412 | |
413 | err = broadsheet_spiflash_write_byte(par, data: 0x05); |
414 | if (err) |
415 | goto failout; |
416 | |
417 | err = broadsheet_spiflash_read_byte(par, data: &tmp); |
418 | if (err) |
419 | goto failout; |
420 | |
421 | broadsheet_write_reg(par, reg: 0x0208, data: 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, reg: 0x0208, data: 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, reg: 0x0208, data: 1); |
445 | |
446 | err = broadsheet_spiflash_write_byte(par, data: 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, data: 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, op: 0xAB, addr: 0x00000000); |
467 | if (err) |
468 | goto failout; |
469 | |
470 | err = broadsheet_spiflash_read_byte(par, data: &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, reg: 0x0208, data: 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, reg: 0x0106, data: 0x0203); |
498 | |
499 | err = broadsheet_setup_spi(par); |
500 | if (err) |
501 | return err; |
502 | |
503 | err = broadsheet_setup_spiflash(par, orig_sfmcd: 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, reg: 0x0208, data: 1); |
516 | if (mode) |
517 | err = broadsheet_spiflash_write_byte(par, data: 0x06); |
518 | else |
519 | err = broadsheet_spiflash_write_byte(par, data: 0x04); |
520 | |
521 | broadsheet_write_reg(par, reg: 0x0208, data: 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, mode: 1); |
531 | |
532 | err = broadsheet_spiflash_op_on_address(par, op: 0xD8, addr); |
533 | |
534 | broadsheet_write_reg(par, reg: 0x0208, data: 0); |
535 | |
536 | if (err) |
537 | return err; |
538 | |
539 | err = broadsheet_spiflash_wait_for_status(par, timeout: 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, op: 0x03, addr); |
551 | if (err) |
552 | goto failout; |
553 | |
554 | for (i = 0; i < size; i++) { |
555 | err = broadsheet_spiflash_read_byte(par, data: &data[i]); |
556 | if (err) |
557 | goto failout; |
558 | } |
559 | |
560 | failout: |
561 | broadsheet_write_reg(par, reg: 0x0208, data: 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, mode: 1); |
573 | |
574 | err = broadsheet_spiflash_op_on_address(par, op: 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: data[i]); |
580 | if (err) |
581 | goto failout; |
582 | } |
583 | |
584 | broadsheet_write_reg(par, reg: 0x0208, data: 0); |
585 | |
586 | err = broadsheet_spiflash_wait_for_status(par, timeout: 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: addr + i, data: &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(size: 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, addr: start_sector_addr, |
637 | size: data_start_addr, data: sector_buffer); |
638 | if (err) |
639 | goto out; |
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, addr: tail_start_addr, |
658 | size: tail_len, data: sector_buffer + tail_start_addr); |
659 | if (err) |
660 | goto out; |
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, addr: start_sector_addr); |
667 | if (err) |
668 | goto out; |
669 | |
670 | /* now write it */ |
671 | err = broadsheet_spiflash_write_sector(par, addr: start_sector_addr, |
672 | data: sector_buffer, sector_size); |
673 | out: |
674 | kfree(objp: sector_buffer); |
675 | return err; |
676 | } |
677 | |
678 | static int broadsheet_write_spiflash(struct broadsheetfb_par *par, u32 wfm_addr, |
679 | const u8 *wfm, int bytecount, int flash_type) |
680 | { |
681 | int sector_size; |
682 | int err; |
683 | int cur_addr; |
684 | int writecount; |
685 | int maxlen; |
686 | int offset = 0; |
687 | |
688 | switch (flash_type) { |
689 | case 0x10: |
690 | sector_size = 32*1024; |
691 | break; |
692 | case 0x11: |
693 | default: |
694 | sector_size = 64*1024; |
695 | break; |
696 | } |
697 | |
698 | while (bytecount) { |
699 | cur_addr = wfm_addr + offset; |
700 | maxlen = roundup(cur_addr, sector_size) - cur_addr; |
701 | writecount = min(bytecount, maxlen); |
702 | |
703 | err = broadsheet_spiflash_rewrite_sector(par, sector_size, |
704 | data_start_addr: cur_addr, data_len: writecount, data: wfm + offset); |
705 | if (err) |
706 | return err; |
707 | |
708 | offset += writecount; |
709 | bytecount -= writecount; |
710 | } |
711 | |
712 | return 0; |
713 | } |
714 | |
715 | static int broadsheet_store_waveform_to_spiflash(struct broadsheetfb_par *par, |
716 | const u8 *wfm, size_t wfm_size) |
717 | { |
718 | int err = 0; |
719 | u16 initial_sfmcd = 0; |
720 | int flash_type = 0; |
721 | |
722 | err = broadsheet_setup_for_wfm_write(par, initial_sfmcd: &initial_sfmcd, flash_type: &flash_type); |
723 | if (err) |
724 | goto failout; |
725 | |
726 | err = broadsheet_write_spiflash(par, wfm_addr: 0x886, wfm, bytecount: wfm_size, flash_type); |
727 | |
728 | failout: |
729 | broadsheet_write_reg(par, reg: 0x0204, data: initial_sfmcd); |
730 | return err; |
731 | } |
732 | |
733 | static ssize_t broadsheet_loadstore_waveform(struct device *dev, |
734 | struct device_attribute *attr, |
735 | const char *buf, size_t len) |
736 | { |
737 | int err; |
738 | struct fb_info *info = dev_get_drvdata(dev); |
739 | struct broadsheetfb_par *par = info->par; |
740 | const struct firmware *fw_entry; |
741 | |
742 | if (len < 1) |
743 | return -EINVAL; |
744 | |
745 | err = request_firmware(fw: &fw_entry, name: "broadsheet.wbf" , device: dev); |
746 | if (err < 0) { |
747 | dev_err(dev, "Failed to get broadsheet waveform\n" ); |
748 | goto err_failed; |
749 | } |
750 | |
751 | /* try to enforce reasonable min max on waveform */ |
752 | if ((fw_entry->size < 8*1024) || (fw_entry->size > 64*1024)) { |
753 | dev_err(dev, "Invalid waveform\n" ); |
754 | err = -EINVAL; |
755 | goto err_fw; |
756 | } |
757 | |
758 | mutex_lock(&(par->io_lock)); |
759 | err = broadsheet_store_waveform_to_spiflash(par, wfm: fw_entry->data, |
760 | wfm_size: fw_entry->size); |
761 | |
762 | mutex_unlock(lock: &(par->io_lock)); |
763 | if (err < 0) { |
764 | dev_err(dev, "Failed to store broadsheet waveform\n" ); |
765 | goto err_fw; |
766 | } |
767 | |
768 | dev_info(dev, "Stored broadsheet waveform, size %zd\n" , fw_entry->size); |
769 | |
770 | err = len; |
771 | |
772 | err_fw: |
773 | release_firmware(fw: fw_entry); |
774 | err_failed: |
775 | return err; |
776 | } |
777 | static DEVICE_ATTR(loadstore_waveform, S_IWUSR, NULL, |
778 | broadsheet_loadstore_waveform); |
779 | |
780 | /* upper level functions that manipulate the display and other stuff */ |
781 | static void broadsheet_init_display(struct broadsheetfb_par *par) |
782 | { |
783 | u16 args[5]; |
784 | int xres = par->info->var.xres; |
785 | int yres = par->info->var.yres; |
786 | |
787 | args[0] = panel_table[par->panel_index].w; |
788 | args[1] = panel_table[par->panel_index].h; |
789 | args[2] = panel_table[par->panel_index].sdcfg; |
790 | args[3] = panel_table[par->panel_index].gdcfg; |
791 | args[4] = panel_table[par->panel_index].lutfmt; |
792 | broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_CFG, argc: 5, argv: args); |
793 | |
794 | /* did the controller really set it? */ |
795 | broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_CFG, argc: 5, argv: args); |
796 | |
797 | args[0] = panel_table[par->panel_index].fsynclen; |
798 | args[1] = panel_table[par->panel_index].fendfbegin; |
799 | args[2] = panel_table[par->panel_index].lsynclen; |
800 | args[3] = panel_table[par->panel_index].lendlbegin; |
801 | args[4] = panel_table[par->panel_index].pixclk; |
802 | broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_TMG, argc: 5, argv: args); |
803 | |
804 | broadsheet_write_reg32(par, reg: 0x310, data: xres*yres*2); |
805 | |
806 | /* setup waveform */ |
807 | args[0] = 0x886; |
808 | args[1] = 0; |
809 | broadsheet_send_cmdargs(par, BS_CMD_RD_WFM_INFO, argc: 2, argv: args); |
810 | |
811 | broadsheet_send_command(par, BS_CMD_UPD_GDRV_CLR); |
812 | |
813 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
814 | |
815 | broadsheet_write_reg(par, reg: 0x330, data: 0x84); |
816 | |
817 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
818 | |
819 | args[0] = (0x3 << 4); |
820 | broadsheet_send_cmdargs(par, BS_CMD_LD_IMG, argc: 1, argv: args); |
821 | |
822 | args[0] = 0x154; |
823 | broadsheet_send_cmdargs(par, BS_CMD_WR_REG, argc: 1, argv: args); |
824 | |
825 | broadsheet_burst_write(par, size: (panel_table[par->panel_index].w * |
826 | panel_table[par->panel_index].h)/2, |
827 | data: (u16 *)par->info->screen_buffer); |
828 | |
829 | broadsheet_send_command(par, BS_CMD_LD_IMG_END); |
830 | |
831 | args[0] = 0x4300; |
832 | broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, argc: 1, argv: args); |
833 | |
834 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
835 | |
836 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); |
837 | |
838 | par->board->wait_for_rdy(par); |
839 | } |
840 | |
841 | static void broadsheet_identify(struct broadsheetfb_par *par) |
842 | { |
843 | u16 rev, prc; |
844 | struct device *dev = par->info->device; |
845 | |
846 | rev = broadsheet_read_reg(par, BS_REG_REV); |
847 | prc = broadsheet_read_reg(par, BS_REG_PRC); |
848 | dev_info(dev, "Broadsheet Rev 0x%x, Product Code 0x%x\n" , rev, prc); |
849 | |
850 | if (prc != 0x0047) |
851 | dev_warn(dev, "Unrecognized Broadsheet Product Code\n" ); |
852 | if (rev != 0x0100) |
853 | dev_warn(dev, "Unrecognized Broadsheet Revision\n" ); |
854 | } |
855 | |
856 | static void broadsheet_init(struct broadsheetfb_par *par) |
857 | { |
858 | broadsheet_send_command(par, BS_CMD_INIT_SYS_RUN); |
859 | /* the controller needs a second */ |
860 | msleep(msecs: 1000); |
861 | broadsheet_init_display(par); |
862 | } |
863 | |
864 | static void broadsheetfb_dpy_update_pages(struct broadsheetfb_par *par, |
865 | u16 y1, u16 y2) |
866 | { |
867 | u16 args[5]; |
868 | unsigned char *buf = par->info->screen_buffer; |
869 | |
870 | mutex_lock(&(par->io_lock)); |
871 | /* y1 must be a multiple of 4 so drop the lower bits */ |
872 | y1 &= 0xFFFC; |
873 | /* y2 must be a multiple of 4 , but - 1 so up the lower bits */ |
874 | y2 |= 0x0003; |
875 | |
876 | args[0] = 0x3 << 4; |
877 | args[1] = 0; |
878 | args[2] = y1; |
879 | args[3] = cpu_to_le16(par->info->var.xres); |
880 | args[4] = y2; |
881 | broadsheet_send_cmdargs(par, BS_CMD_LD_IMG_AREA, argc: 5, argv: args); |
882 | |
883 | args[0] = 0x154; |
884 | broadsheet_send_cmdargs(par, BS_CMD_WR_REG, argc: 1, argv: args); |
885 | |
886 | buf += y1 * par->info->var.xres; |
887 | broadsheet_burst_write(par, size: ((1 + y2 - y1) * par->info->var.xres)/2, |
888 | data: (u16 *) buf); |
889 | |
890 | broadsheet_send_command(par, BS_CMD_LD_IMG_END); |
891 | |
892 | args[0] = 0x4300; |
893 | broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, argc: 1, argv: args); |
894 | |
895 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
896 | |
897 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); |
898 | |
899 | par->board->wait_for_rdy(par); |
900 | mutex_unlock(lock: &(par->io_lock)); |
901 | |
902 | } |
903 | |
904 | static void broadsheetfb_dpy_update(struct broadsheetfb_par *par) |
905 | { |
906 | u16 args[5]; |
907 | |
908 | mutex_lock(&(par->io_lock)); |
909 | args[0] = 0x3 << 4; |
910 | broadsheet_send_cmdargs(par, BS_CMD_LD_IMG, argc: 1, argv: args); |
911 | |
912 | args[0] = 0x154; |
913 | broadsheet_send_cmdargs(par, BS_CMD_WR_REG, argc: 1, argv: args); |
914 | broadsheet_burst_write(par, size: (panel_table[par->panel_index].w * |
915 | panel_table[par->panel_index].h)/2, |
916 | data: (u16 *)par->info->screen_buffer); |
917 | |
918 | broadsheet_send_command(par, BS_CMD_LD_IMG_END); |
919 | |
920 | args[0] = 0x4300; |
921 | broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, argc: 1, argv: args); |
922 | |
923 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); |
924 | |
925 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); |
926 | |
927 | par->board->wait_for_rdy(par); |
928 | mutex_unlock(lock: &(par->io_lock)); |
929 | } |
930 | |
931 | /* this is called back from the deferred io workqueue */ |
932 | static void broadsheetfb_dpy_deferred_io(struct fb_info *info, struct list_head *) |
933 | { |
934 | u16 y1 = 0, h = 0; |
935 | unsigned long prev_offset = ULONG_MAX; |
936 | struct fb_deferred_io_pageref *; |
937 | int h_inc; |
938 | u16 yres = info->var.yres; |
939 | u16 xres = info->var.xres; |
940 | |
941 | /* height increment is fixed per page */ |
942 | h_inc = DIV_ROUND_UP(PAGE_SIZE , xres); |
943 | |
944 | /* walk the written page list and swizzle the data */ |
945 | list_for_each_entry(pageref, pagereflist, list) { |
946 | if (prev_offset == ULONG_MAX) { |
947 | /* just starting so assign first page */ |
948 | y1 = pageref->offset / xres; |
949 | h = h_inc; |
950 | } else if ((prev_offset + PAGE_SIZE) == pageref->offset) { |
951 | /* this page is consecutive so increase our height */ |
952 | h += h_inc; |
953 | } else { |
954 | /* page not consecutive, issue previous update first */ |
955 | broadsheetfb_dpy_update_pages(par: info->par, y1, y2: y1 + h); |
956 | /* start over with our non consecutive page */ |
957 | y1 = pageref->offset / xres; |
958 | h = h_inc; |
959 | } |
960 | prev_offset = pageref->offset; |
961 | } |
962 | |
963 | /* if we still have any pages to update we do so now */ |
964 | if (h >= yres) { |
965 | /* its a full screen update, just do it */ |
966 | broadsheetfb_dpy_update(par: info->par); |
967 | } else { |
968 | broadsheetfb_dpy_update_pages(par: info->par, y1, |
969 | min((u16) (y1 + h), yres)); |
970 | } |
971 | } |
972 | |
973 | static void broadsheetfb_defio_damage_range(struct fb_info *info, off_t off, size_t len) |
974 | { |
975 | struct broadsheetfb_par *par = info->par; |
976 | |
977 | broadsheetfb_dpy_update(par); |
978 | } |
979 | |
980 | static void broadsheetfb_defio_damage_area(struct fb_info *info, u32 x, u32 y, |
981 | u32 width, u32 height) |
982 | { |
983 | struct broadsheetfb_par *par = info->par; |
984 | |
985 | broadsheetfb_dpy_update(par); |
986 | } |
987 | |
988 | FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(broadsheetfb, |
989 | broadsheetfb_defio_damage_range, |
990 | broadsheetfb_defio_damage_area) |
991 | |
992 | static const struct fb_ops broadsheetfb_ops = { |
993 | .owner = THIS_MODULE, |
994 | FB_DEFAULT_DEFERRED_OPS(broadsheetfb), |
995 | }; |
996 | |
997 | static struct fb_deferred_io broadsheetfb_defio = { |
998 | .delay = HZ/4, |
999 | .sort_pagereflist = true, |
1000 | .deferred_io = broadsheetfb_dpy_deferred_io, |
1001 | }; |
1002 | |
1003 | static int broadsheetfb_probe(struct platform_device *dev) |
1004 | { |
1005 | struct fb_info *info; |
1006 | struct broadsheet_board *board; |
1007 | int retval = -ENOMEM; |
1008 | int videomemorysize; |
1009 | unsigned char *videomemory; |
1010 | struct broadsheetfb_par *par; |
1011 | int i; |
1012 | int dpyw, dpyh; |
1013 | int panel_index; |
1014 | |
1015 | /* pick up board specific routines */ |
1016 | board = dev->dev.platform_data; |
1017 | if (!board) |
1018 | return -EINVAL; |
1019 | |
1020 | /* try to count device specific driver, if can't, platform recalls */ |
1021 | if (!try_module_get(module: board->owner)) |
1022 | return -ENODEV; |
1023 | |
1024 | info = framebuffer_alloc(size: sizeof(struct broadsheetfb_par), dev: &dev->dev); |
1025 | if (!info) |
1026 | goto err; |
1027 | |
1028 | switch (board->get_panel_type()) { |
1029 | case 37: |
1030 | panel_index = 1; |
1031 | break; |
1032 | case 97: |
1033 | panel_index = 2; |
1034 | break; |
1035 | case 6: |
1036 | default: |
1037 | panel_index = 0; |
1038 | break; |
1039 | } |
1040 | |
1041 | dpyw = panel_table[panel_index].w; |
1042 | dpyh = panel_table[panel_index].h; |
1043 | |
1044 | videomemorysize = roundup((dpyw*dpyh), PAGE_SIZE); |
1045 | |
1046 | videomemory = vzalloc(size: videomemorysize); |
1047 | if (!videomemory) |
1048 | goto err_fb_rel; |
1049 | |
1050 | info->screen_buffer = videomemory; |
1051 | info->fbops = &broadsheetfb_ops; |
1052 | |
1053 | broadsheetfb_var.xres = dpyw; |
1054 | broadsheetfb_var.yres = dpyh; |
1055 | broadsheetfb_var.xres_virtual = dpyw; |
1056 | broadsheetfb_var.yres_virtual = dpyh; |
1057 | info->var = broadsheetfb_var; |
1058 | |
1059 | broadsheetfb_fix.line_length = dpyw; |
1060 | info->fix = broadsheetfb_fix; |
1061 | info->fix.smem_len = videomemorysize; |
1062 | par = info->par; |
1063 | par->panel_index = panel_index; |
1064 | par->info = info; |
1065 | par->board = board; |
1066 | par->write_reg = broadsheet_write_reg; |
1067 | par->read_reg = broadsheet_read_reg; |
1068 | init_waitqueue_head(&par->waitq); |
1069 | |
1070 | mutex_init(&par->io_lock); |
1071 | |
1072 | info->flags = FBINFO_VIRTFB; |
1073 | |
1074 | info->fbdefio = &broadsheetfb_defio; |
1075 | fb_deferred_io_init(info); |
1076 | |
1077 | retval = fb_alloc_cmap(cmap: &info->cmap, len: 16, transp: 0); |
1078 | if (retval < 0) { |
1079 | dev_err(&dev->dev, "Failed to allocate colormap\n" ); |
1080 | goto err_vfree; |
1081 | } |
1082 | |
1083 | /* set cmap */ |
1084 | for (i = 0; i < 16; i++) |
1085 | info->cmap.red[i] = (((2*i)+1)*(0xFFFF))/32; |
1086 | memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*16); |
1087 | memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*16); |
1088 | |
1089 | retval = par->board->setup_irq(info); |
1090 | if (retval < 0) |
1091 | goto err_cmap; |
1092 | |
1093 | /* this inits the dpy */ |
1094 | retval = board->init(par); |
1095 | if (retval < 0) |
1096 | goto err_free_irq; |
1097 | |
1098 | broadsheet_identify(par); |
1099 | |
1100 | broadsheet_init(par); |
1101 | |
1102 | retval = register_framebuffer(fb_info: info); |
1103 | if (retval < 0) |
1104 | goto err_free_irq; |
1105 | |
1106 | platform_set_drvdata(pdev: dev, data: info); |
1107 | |
1108 | retval = device_create_file(device: &dev->dev, entry: &dev_attr_loadstore_waveform); |
1109 | if (retval < 0) |
1110 | goto err_unreg_fb; |
1111 | |
1112 | fb_info(info, "Broadsheet frame buffer, using %dK of video memory\n" , |
1113 | videomemorysize >> 10); |
1114 | |
1115 | |
1116 | return 0; |
1117 | |
1118 | err_unreg_fb: |
1119 | unregister_framebuffer(fb_info: info); |
1120 | err_free_irq: |
1121 | board->cleanup(par); |
1122 | err_cmap: |
1123 | fb_dealloc_cmap(cmap: &info->cmap); |
1124 | err_vfree: |
1125 | vfree(addr: videomemory); |
1126 | err_fb_rel: |
1127 | framebuffer_release(info); |
1128 | err: |
1129 | module_put(module: board->owner); |
1130 | return retval; |
1131 | |
1132 | } |
1133 | |
1134 | static void broadsheetfb_remove(struct platform_device *dev) |
1135 | { |
1136 | struct fb_info *info = platform_get_drvdata(pdev: dev); |
1137 | |
1138 | if (info) { |
1139 | struct broadsheetfb_par *par = info->par; |
1140 | |
1141 | device_remove_file(dev: info->device, attr: &dev_attr_loadstore_waveform); |
1142 | unregister_framebuffer(fb_info: info); |
1143 | fb_deferred_io_cleanup(info); |
1144 | par->board->cleanup(par); |
1145 | fb_dealloc_cmap(cmap: &info->cmap); |
1146 | vfree(addr: info->screen_buffer); |
1147 | module_put(module: par->board->owner); |
1148 | framebuffer_release(info); |
1149 | } |
1150 | } |
1151 | |
1152 | static struct platform_driver broadsheetfb_driver = { |
1153 | .probe = broadsheetfb_probe, |
1154 | .remove_new = broadsheetfb_remove, |
1155 | .driver = { |
1156 | .name = "broadsheetfb" , |
1157 | }, |
1158 | }; |
1159 | module_platform_driver(broadsheetfb_driver); |
1160 | |
1161 | MODULE_DESCRIPTION("fbdev driver for Broadsheet controller" ); |
1162 | MODULE_AUTHOR("Jaya Kumar" ); |
1163 | MODULE_LICENSE("GPL" ); |
1164 | |
1165 | MODULE_FIRMWARE("broadsheet.wbf" ); |
1166 | |