]>
Commit | Line | Data |
---|---|---|
de7c6d15 JK |
1 | /* |
2 | * linux/drivers/video/metronomefb.c -- FB driver for Metronome 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 work was made possible by help and equipment support from E-Ink | |
631dd1a8 | 13 | * Corporation. http://www.eink.com/ |
de7c6d15 JK |
14 | * |
15 | * This driver is written to be used with the Metronome display controller. | |
03c33a4f JK |
16 | * It is intended to be architecture independent. A board specific driver |
17 | * must be used to perform all the physical IO interactions. An example | |
18 | * is provided as am200epd.c | |
de7c6d15 | 19 | * |
de7c6d15 JK |
20 | */ |
21 | #include <linux/module.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/string.h> | |
25 | #include <linux/mm.h> | |
de7c6d15 JK |
26 | #include <linux/vmalloc.h> |
27 | #include <linux/delay.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/fb.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/platform_device.h> | |
32 | #include <linux/list.h> | |
33 | #include <linux/firmware.h> | |
34 | #include <linux/dma-mapping.h> | |
35 | #include <linux/uaccess.h> | |
36 | #include <linux/irq.h> | |
37 | ||
03c33a4f JK |
38 | #include <video/metronomefb.h> |
39 | ||
de7c6d15 JK |
40 | #include <asm/unaligned.h> |
41 | ||
de7c6d15 JK |
42 | /* Display specific information */ |
43 | #define DPY_W 832 | |
44 | #define DPY_H 622 | |
45 | ||
e9355085 JK |
46 | static int user_wfm_size; |
47 | ||
de7c6d15 JK |
48 | /* frame differs from image. frame includes non-visible pixels */ |
49 | struct epd_frame { | |
50 | int fw; /* frame width */ | |
51 | int fh; /* frame height */ | |
e9355085 JK |
52 | u16 config[4]; |
53 | int wfm_size; | |
de7c6d15 JK |
54 | }; |
55 | ||
56 | static struct epd_frame epd_frame_table[] = { | |
57 | { | |
e9355085 JK |
58 | .fw = 832, |
59 | .fh = 622, | |
60 | .config = { | |
61 | 15 /* sdlew */ | |
62 | | 2 << 8 /* sdosz */ | |
63 | | 0 << 11 /* sdor */ | |
64 | | 0 << 12 /* sdces */ | |
65 | | 0 << 15, /* sdcer */ | |
66 | 42 /* gdspl */ | |
67 | | 1 << 8 /* gdr1 */ | |
68 | | 1 << 9 /* sdshr */ | |
69 | | 0 << 15, /* gdspp */ | |
70 | 18 /* gdspw */ | |
71 | | 0 << 15, /* dispc */ | |
72 | 599 /* vdlc */ | |
73 | | 0 << 11 /* dsi */ | |
74 | | 0 << 12, /* dsic */ | |
75 | }, | |
76 | .wfm_size = 47001, | |
77 | }, | |
78 | { | |
79 | .fw = 1088, | |
80 | .fh = 791, | |
81 | .config = { | |
82 | 0x0104, | |
83 | 0x031f, | |
84 | 0x0088, | |
85 | 0x02ff, | |
86 | }, | |
87 | .wfm_size = 46770, | |
88 | }, | |
89 | { | |
90 | .fw = 1200, | |
91 | .fh = 842, | |
92 | .config = { | |
93 | 0x0101, | |
94 | 0x030e, | |
95 | 0x0012, | |
96 | 0x0280, | |
97 | }, | |
98 | .wfm_size = 46770, | |
de7c6d15 JK |
99 | }, |
100 | }; | |
101 | ||
48c68c4f | 102 | static struct fb_fix_screeninfo metronomefb_fix = { |
de7c6d15 JK |
103 | .id = "metronomefb", |
104 | .type = FB_TYPE_PACKED_PIXELS, | |
105 | .visual = FB_VISUAL_STATIC_PSEUDOCOLOR, | |
106 | .xpanstep = 0, | |
107 | .ypanstep = 0, | |
108 | .ywrapstep = 0, | |
109 | .line_length = DPY_W, | |
110 | .accel = FB_ACCEL_NONE, | |
111 | }; | |
112 | ||
48c68c4f | 113 | static struct fb_var_screeninfo metronomefb_var = { |
de7c6d15 JK |
114 | .xres = DPY_W, |
115 | .yres = DPY_H, | |
116 | .xres_virtual = DPY_W, | |
117 | .yres_virtual = DPY_H, | |
118 | .bits_per_pixel = 8, | |
119 | .grayscale = 1, | |
120 | .nonstd = 1, | |
121 | .red = { 4, 3, 0 }, | |
122 | .green = { 0, 0, 0 }, | |
123 | .blue = { 0, 0, 0 }, | |
124 | .transp = { 0, 0, 0 }, | |
125 | }; | |
126 | ||
03c33a4f | 127 | /* the waveform structure that is coming from userspace firmware */ |
de7c6d15 JK |
128 | struct waveform_hdr { |
129 | u8 stuff[32]; | |
130 | ||
131 | u8 wmta[3]; | |
132 | u8 fvsn; | |
133 | ||
134 | u8 luts; | |
135 | u8 mc; | |
136 | u8 trc; | |
137 | u8 stuff3; | |
138 | ||
139 | u8 endb; | |
140 | u8 swtb; | |
141 | u8 stuff2a[2]; | |
142 | ||
143 | u8 stuff2b[3]; | |
144 | u8 wfm_cs; | |
145 | } __attribute__ ((packed)); | |
146 | ||
147 | /* main metronomefb functions */ | |
148 | static u8 calc_cksum(int start, int end, u8 *mem) | |
149 | { | |
150 | u8 tmp = 0; | |
151 | int i; | |
152 | ||
153 | for (i = start; i < end; i++) | |
154 | tmp += mem[i]; | |
155 | ||
156 | return tmp; | |
157 | } | |
158 | ||
159 | static u16 calc_img_cksum(u16 *start, int length) | |
160 | { | |
161 | u16 tmp = 0; | |
162 | ||
163 | while (length--) | |
164 | tmp += *start++; | |
165 | ||
166 | return tmp; | |
167 | } | |
168 | ||
169 | /* here we decode the incoming waveform file and populate metromem */ | |
48c68c4f GKH |
170 | static int load_waveform(u8 *mem, size_t size, int m, int t, |
171 | struct metronomefb_par *par) | |
de7c6d15 JK |
172 | { |
173 | int tta; | |
174 | int wmta; | |
175 | int trn = 0; | |
176 | int i; | |
177 | unsigned char v; | |
178 | u8 cksum; | |
179 | int cksum_idx; | |
180 | int wfm_idx, owfm_idx; | |
181 | int mem_idx = 0; | |
182 | struct waveform_hdr *wfm_hdr; | |
28501336 JK |
183 | u8 *metromem = par->metromem_wfm; |
184 | struct device *dev = par->info->dev; | |
de7c6d15 | 185 | |
e9355085 JK |
186 | if (user_wfm_size) |
187 | epd_frame_table[par->dt].wfm_size = user_wfm_size; | |
188 | ||
189 | if (size != epd_frame_table[par->dt].wfm_size) { | |
6d54aaf3 | 190 | dev_err(dev, "Error: unexpected size %Zd != %d\n", size, |
e9355085 | 191 | epd_frame_table[par->dt].wfm_size); |
de7c6d15 JK |
192 | return -EINVAL; |
193 | } | |
194 | ||
195 | wfm_hdr = (struct waveform_hdr *) mem; | |
196 | ||
197 | if (wfm_hdr->fvsn != 1) { | |
28501336 | 198 | dev_err(dev, "Error: bad fvsn %x\n", wfm_hdr->fvsn); |
de7c6d15 JK |
199 | return -EINVAL; |
200 | } | |
201 | if (wfm_hdr->luts != 0) { | |
28501336 | 202 | dev_err(dev, "Error: bad luts %x\n", wfm_hdr->luts); |
de7c6d15 JK |
203 | return -EINVAL; |
204 | } | |
205 | cksum = calc_cksum(32, 47, mem); | |
206 | if (cksum != wfm_hdr->wfm_cs) { | |
28501336 | 207 | dev_err(dev, "Error: bad cksum %x != %x\n", cksum, |
de7c6d15 JK |
208 | wfm_hdr->wfm_cs); |
209 | return -EINVAL; | |
210 | } | |
211 | wfm_hdr->mc += 1; | |
212 | wfm_hdr->trc += 1; | |
213 | for (i = 0; i < 5; i++) { | |
214 | if (*(wfm_hdr->stuff2a + i) != 0) { | |
28501336 | 215 | dev_err(dev, "Error: unexpected value in padding\n"); |
de7c6d15 JK |
216 | return -EINVAL; |
217 | } | |
218 | } | |
219 | ||
220 | /* calculating trn. trn is something used to index into | |
221 | the waveform. presumably selecting the right one for the | |
222 | desired temperature. it works out the offset of the first | |
223 | v that exceeds the specified temperature */ | |
224 | if ((sizeof(*wfm_hdr) + wfm_hdr->trc) > size) | |
225 | return -EINVAL; | |
226 | ||
227 | for (i = sizeof(*wfm_hdr); i <= sizeof(*wfm_hdr) + wfm_hdr->trc; i++) { | |
228 | if (mem[i] > t) { | |
229 | trn = i - sizeof(*wfm_hdr) - 1; | |
230 | break; | |
231 | } | |
232 | } | |
233 | ||
234 | /* check temperature range table checksum */ | |
235 | cksum_idx = sizeof(*wfm_hdr) + wfm_hdr->trc + 1; | |
236 | if (cksum_idx > size) | |
237 | return -EINVAL; | |
238 | cksum = calc_cksum(sizeof(*wfm_hdr), cksum_idx, mem); | |
239 | if (cksum != mem[cksum_idx]) { | |
28501336 | 240 | dev_err(dev, "Error: bad temperature range table cksum" |
de7c6d15 JK |
241 | " %x != %x\n", cksum, mem[cksum_idx]); |
242 | return -EINVAL; | |
243 | } | |
244 | ||
245 | /* check waveform mode table address checksum */ | |
d15c0a4d | 246 | wmta = get_unaligned_le32(wfm_hdr->wmta) & 0x00FFFFFF; |
de7c6d15 JK |
247 | cksum_idx = wmta + m*4 + 3; |
248 | if (cksum_idx > size) | |
249 | return -EINVAL; | |
250 | cksum = calc_cksum(cksum_idx - 3, cksum_idx, mem); | |
251 | if (cksum != mem[cksum_idx]) { | |
28501336 | 252 | dev_err(dev, "Error: bad mode table address cksum" |
de7c6d15 JK |
253 | " %x != %x\n", cksum, mem[cksum_idx]); |
254 | return -EINVAL; | |
255 | } | |
256 | ||
257 | /* check waveform temperature table address checksum */ | |
d15c0a4d | 258 | tta = get_unaligned_le32(mem + wmta + m * 4) & 0x00FFFFFF; |
de7c6d15 JK |
259 | cksum_idx = tta + trn*4 + 3; |
260 | if (cksum_idx > size) | |
261 | return -EINVAL; | |
262 | cksum = calc_cksum(cksum_idx - 3, cksum_idx, mem); | |
263 | if (cksum != mem[cksum_idx]) { | |
28501336 | 264 | dev_err(dev, "Error: bad temperature table address cksum" |
de7c6d15 JK |
265 | " %x != %x\n", cksum, mem[cksum_idx]); |
266 | return -EINVAL; | |
267 | } | |
268 | ||
269 | /* here we do the real work of putting the waveform into the | |
270 | metromem buffer. this does runlength decoding of the waveform */ | |
d15c0a4d | 271 | wfm_idx = get_unaligned_le32(mem + tta + trn * 4) & 0x00FFFFFF; |
de7c6d15 JK |
272 | owfm_idx = wfm_idx; |
273 | if (wfm_idx > size) | |
274 | return -EINVAL; | |
275 | while (wfm_idx < size) { | |
276 | unsigned char rl; | |
277 | v = mem[wfm_idx++]; | |
278 | if (v == wfm_hdr->swtb) { | |
279 | while (((v = mem[wfm_idx++]) != wfm_hdr->swtb) && | |
280 | wfm_idx < size) | |
281 | metromem[mem_idx++] = v; | |
282 | ||
283 | continue; | |
284 | } | |
285 | ||
286 | if (v == wfm_hdr->endb) | |
287 | break; | |
288 | ||
289 | rl = mem[wfm_idx++]; | |
290 | for (i = 0; i <= rl; i++) | |
291 | metromem[mem_idx++] = v; | |
292 | } | |
293 | ||
294 | cksum_idx = wfm_idx; | |
295 | if (cksum_idx > size) | |
296 | return -EINVAL; | |
297 | cksum = calc_cksum(owfm_idx, cksum_idx, mem); | |
298 | if (cksum != mem[cksum_idx]) { | |
28501336 | 299 | dev_err(dev, "Error: bad waveform data cksum" |
de7c6d15 JK |
300 | " %x != %x\n", cksum, mem[cksum_idx]); |
301 | return -EINVAL; | |
302 | } | |
28501336 | 303 | par->frame_count = (mem_idx/64); |
de7c6d15 JK |
304 | |
305 | return 0; | |
306 | } | |
307 | ||
de7c6d15 JK |
308 | static int metronome_display_cmd(struct metronomefb_par *par) |
309 | { | |
310 | int i; | |
311 | u16 cs; | |
312 | u16 opcode; | |
313 | static u8 borderval; | |
de7c6d15 JK |
314 | |
315 | /* setup display command | |
316 | we can't immediately set the opcode since the controller | |
317 | will try parse the command before we've set it all up | |
318 | so we just set cs here and set the opcode at the end */ | |
319 | ||
de7c6d15 JK |
320 | if (par->metromem_cmd->opcode == 0xCC40) |
321 | opcode = cs = 0xCC41; | |
322 | else | |
323 | opcode = cs = 0xCC40; | |
324 | ||
325 | /* set the args ( 2 bytes ) for display */ | |
326 | i = 0; | |
327 | par->metromem_cmd->args[i] = 1 << 3 /* border update */ | |
328 | | ((borderval++ % 4) & 0x0F) << 4 | |
329 | | (par->frame_count - 1) << 8; | |
330 | cs += par->metromem_cmd->args[i++]; | |
331 | ||
332 | /* the rest are 0 */ | |
333 | memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2); | |
334 | ||
335 | par->metromem_cmd->csum = cs; | |
336 | par->metromem_cmd->opcode = opcode; /* display cmd */ | |
337 | ||
03c33a4f | 338 | return par->board->met_wait_event_intr(par); |
de7c6d15 JK |
339 | } |
340 | ||
48c68c4f | 341 | static int metronome_powerup_cmd(struct metronomefb_par *par) |
de7c6d15 JK |
342 | { |
343 | int i; | |
344 | u16 cs; | |
345 | ||
346 | /* setup power up command */ | |
347 | par->metromem_cmd->opcode = 0x1234; /* pwr up pseudo cmd */ | |
348 | cs = par->metromem_cmd->opcode; | |
349 | ||
350 | /* set pwr1,2,3 to 1024 */ | |
351 | for (i = 0; i < 3; i++) { | |
352 | par->metromem_cmd->args[i] = 1024; | |
353 | cs += par->metromem_cmd->args[i]; | |
354 | } | |
355 | ||
356 | /* the rest are 0 */ | |
357 | memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2); | |
358 | ||
359 | par->metromem_cmd->csum = cs; | |
360 | ||
361 | msleep(1); | |
03c33a4f | 362 | par->board->set_rst(par, 1); |
de7c6d15 JK |
363 | |
364 | msleep(1); | |
03c33a4f | 365 | par->board->set_stdby(par, 1); |
de7c6d15 | 366 | |
03c33a4f | 367 | return par->board->met_wait_event(par); |
de7c6d15 JK |
368 | } |
369 | ||
48c68c4f | 370 | static int metronome_config_cmd(struct metronomefb_par *par) |
de7c6d15 | 371 | { |
de7c6d15 JK |
372 | /* setup config command |
373 | we can't immediately set the opcode since the controller | |
e9355085 | 374 | will try parse the command before we've set it all up */ |
de7c6d15 | 375 | |
e9355085 JK |
376 | memcpy(par->metromem_cmd->args, epd_frame_table[par->dt].config, |
377 | sizeof(epd_frame_table[par->dt].config)); | |
de7c6d15 | 378 | /* the rest are 0 */ |
e9355085 | 379 | memset((u8 *) (par->metromem_cmd->args + 4), 0, (32-4)*2); |
de7c6d15 | 380 | |
e9355085 JK |
381 | par->metromem_cmd->csum = 0xCC10; |
382 | par->metromem_cmd->csum += calc_img_cksum(par->metromem_cmd->args, 4); | |
de7c6d15 JK |
383 | par->metromem_cmd->opcode = 0xCC10; /* config cmd */ |
384 | ||
03c33a4f | 385 | return par->board->met_wait_event(par); |
de7c6d15 JK |
386 | } |
387 | ||
48c68c4f | 388 | static int metronome_init_cmd(struct metronomefb_par *par) |
de7c6d15 JK |
389 | { |
390 | int i; | |
391 | u16 cs; | |
392 | ||
393 | /* setup init command | |
394 | we can't immediately set the opcode since the controller | |
395 | will try parse the command before we've set it all up | |
396 | so we just set cs here and set the opcode at the end */ | |
397 | ||
398 | cs = 0xCC20; | |
399 | ||
400 | /* set the args ( 2 bytes ) for init */ | |
401 | i = 0; | |
402 | par->metromem_cmd->args[i] = 0; | |
403 | cs += par->metromem_cmd->args[i++]; | |
404 | ||
405 | /* the rest are 0 */ | |
406 | memset((u8 *) (par->metromem_cmd->args + i), 0, (32-i)*2); | |
407 | ||
408 | par->metromem_cmd->csum = cs; | |
409 | par->metromem_cmd->opcode = 0xCC20; /* init cmd */ | |
410 | ||
03c33a4f | 411 | return par->board->met_wait_event(par); |
de7c6d15 JK |
412 | } |
413 | ||
48c68c4f | 414 | static int metronome_init_regs(struct metronomefb_par *par) |
de7c6d15 JK |
415 | { |
416 | int res; | |
417 | ||
e9355085 JK |
418 | res = par->board->setup_io(par); |
419 | if (res) | |
420 | return res; | |
de7c6d15 JK |
421 | |
422 | res = metronome_powerup_cmd(par); | |
423 | if (res) | |
424 | return res; | |
425 | ||
426 | res = metronome_config_cmd(par); | |
427 | if (res) | |
428 | return res; | |
429 | ||
430 | res = metronome_init_cmd(par); | |
de7c6d15 JK |
431 | |
432 | return res; | |
433 | } | |
434 | ||
435 | static void metronomefb_dpy_update(struct metronomefb_par *par) | |
436 | { | |
e9355085 | 437 | int fbsize; |
de7c6d15 JK |
438 | u16 cksum; |
439 | unsigned char *buf = (unsigned char __force *)par->info->screen_base; | |
440 | ||
e9355085 | 441 | fbsize = par->info->fix.smem_len; |
de7c6d15 | 442 | /* copy from vm to metromem */ |
e9355085 | 443 | memcpy(par->metromem_img, buf, fbsize); |
de7c6d15 | 444 | |
e9355085 JK |
445 | cksum = calc_img_cksum((u16 *) par->metromem_img, fbsize/2); |
446 | *((u16 *)(par->metromem_img) + fbsize/2) = cksum; | |
de7c6d15 JK |
447 | metronome_display_cmd(par); |
448 | } | |
449 | ||
450 | static u16 metronomefb_dpy_update_page(struct metronomefb_par *par, int index) | |
451 | { | |
452 | int i; | |
453 | u16 csum = 0; | |
03c33a4f JK |
454 | u16 *buf = (u16 __force *)(par->info->screen_base + index); |
455 | u16 *img = (u16 *)(par->metromem_img + index); | |
de7c6d15 JK |
456 | |
457 | /* swizzle from vm to metromem and recalc cksum at the same time*/ | |
458 | for (i = 0; i < PAGE_SIZE/2; i++) { | |
459 | *(img + i) = (buf[i] << 5) & 0xE0E0; | |
460 | csum += *(img + i); | |
461 | } | |
462 | return csum; | |
463 | } | |
464 | ||
465 | /* this is called back from the deferred io workqueue */ | |
466 | static void metronomefb_dpy_deferred_io(struct fb_info *info, | |
467 | struct list_head *pagelist) | |
468 | { | |
469 | u16 cksum; | |
470 | struct page *cur; | |
471 | struct fb_deferred_io *fbdefio = info->fbdefio; | |
472 | struct metronomefb_par *par = info->par; | |
473 | ||
474 | /* walk the written page list and swizzle the data */ | |
475 | list_for_each_entry(cur, &fbdefio->pagelist, lru) { | |
476 | cksum = metronomefb_dpy_update_page(par, | |
477 | (cur->index << PAGE_SHIFT)); | |
478 | par->metromem_img_csum -= par->csum_table[cur->index]; | |
479 | par->csum_table[cur->index] = cksum; | |
480 | par->metromem_img_csum += cksum; | |
481 | } | |
482 | ||
483 | metronome_display_cmd(par); | |
484 | } | |
485 | ||
486 | static void metronomefb_fillrect(struct fb_info *info, | |
487 | const struct fb_fillrect *rect) | |
488 | { | |
489 | struct metronomefb_par *par = info->par; | |
490 | ||
555514fa | 491 | sys_fillrect(info, rect); |
de7c6d15 JK |
492 | metronomefb_dpy_update(par); |
493 | } | |
494 | ||
495 | static void metronomefb_copyarea(struct fb_info *info, | |
496 | const struct fb_copyarea *area) | |
497 | { | |
498 | struct metronomefb_par *par = info->par; | |
499 | ||
555514fa | 500 | sys_copyarea(info, area); |
de7c6d15 JK |
501 | metronomefb_dpy_update(par); |
502 | } | |
503 | ||
504 | static void metronomefb_imageblit(struct fb_info *info, | |
505 | const struct fb_image *image) | |
506 | { | |
507 | struct metronomefb_par *par = info->par; | |
508 | ||
555514fa | 509 | sys_imageblit(info, image); |
de7c6d15 JK |
510 | metronomefb_dpy_update(par); |
511 | } | |
512 | ||
513 | /* | |
514 | * this is the slow path from userspace. they can seek and write to | |
515 | * the fb. it is based on fb_sys_write | |
516 | */ | |
517 | static ssize_t metronomefb_write(struct fb_info *info, const char __user *buf, | |
518 | size_t count, loff_t *ppos) | |
519 | { | |
520 | struct metronomefb_par *par = info->par; | |
521 | unsigned long p = *ppos; | |
522 | void *dst; | |
523 | int err = 0; | |
524 | unsigned long total_size; | |
525 | ||
526 | if (info->state != FBINFO_STATE_RUNNING) | |
527 | return -EPERM; | |
528 | ||
529 | total_size = info->fix.smem_len; | |
530 | ||
531 | if (p > total_size) | |
532 | return -EFBIG; | |
533 | ||
534 | if (count > total_size) { | |
535 | err = -EFBIG; | |
536 | count = total_size; | |
537 | } | |
538 | ||
539 | if (count + p > total_size) { | |
540 | if (!err) | |
541 | err = -ENOSPC; | |
542 | ||
543 | count = total_size - p; | |
544 | } | |
545 | ||
03c33a4f | 546 | dst = (void __force *)(info->screen_base + p); |
de7c6d15 JK |
547 | |
548 | if (copy_from_user(dst, buf, count)) | |
549 | err = -EFAULT; | |
550 | ||
551 | if (!err) | |
552 | *ppos += count; | |
553 | ||
554 | metronomefb_dpy_update(par); | |
555 | ||
556 | return (err) ? err : count; | |
557 | } | |
558 | ||
559 | static struct fb_ops metronomefb_ops = { | |
560 | .owner = THIS_MODULE, | |
561 | .fb_write = metronomefb_write, | |
562 | .fb_fillrect = metronomefb_fillrect, | |
563 | .fb_copyarea = metronomefb_copyarea, | |
564 | .fb_imageblit = metronomefb_imageblit, | |
565 | }; | |
566 | ||
567 | static struct fb_deferred_io metronomefb_defio = { | |
568 | .delay = HZ, | |
569 | .deferred_io = metronomefb_dpy_deferred_io, | |
570 | }; | |
571 | ||
48c68c4f | 572 | static int metronomefb_probe(struct platform_device *dev) |
de7c6d15 JK |
573 | { |
574 | struct fb_info *info; | |
03c33a4f | 575 | struct metronome_board *board; |
de7c6d15 JK |
576 | int retval = -ENOMEM; |
577 | int videomemorysize; | |
578 | unsigned char *videomemory; | |
579 | struct metronomefb_par *par; | |
580 | const struct firmware *fw_entry; | |
de7c6d15 | 581 | int i; |
e9355085 JK |
582 | int panel_type; |
583 | int fw, fh; | |
584 | int epd_dt_index; | |
de7c6d15 | 585 | |
03c33a4f JK |
586 | /* pick up board specific routines */ |
587 | board = dev->dev.platform_data; | |
588 | if (!board) | |
589 | return -EINVAL; | |
590 | ||
591 | /* try to count device specific driver, if can't, platform recalls */ | |
592 | if (!try_module_get(board->owner)) | |
593 | return -ENODEV; | |
594 | ||
e9355085 JK |
595 | info = framebuffer_alloc(sizeof(struct metronomefb_par), &dev->dev); |
596 | if (!info) | |
597 | goto err; | |
598 | ||
de7c6d15 JK |
599 | /* we have two blocks of memory. |
600 | info->screen_base which is vm, and is the fb used by apps. | |
601 | par->metromem which is physically contiguous memory and | |
602 | contains the display controller commands, waveform, | |
603 | processed image data and padding. this is the data pulled | |
e9355085 JK |
604 | by the device's LCD controller and pushed to Metronome. |
605 | the metromem memory is allocated by the board driver and | |
606 | is provided to us */ | |
607 | ||
608 | panel_type = board->get_panel_type(); | |
609 | switch (panel_type) { | |
610 | case 6: | |
611 | epd_dt_index = 0; | |
612 | break; | |
613 | case 8: | |
614 | epd_dt_index = 1; | |
615 | break; | |
616 | case 97: | |
617 | epd_dt_index = 2; | |
618 | break; | |
619 | default: | |
620 | dev_err(&dev->dev, "Unexpected panel type. Defaulting to 6\n"); | |
621 | epd_dt_index = 0; | |
622 | break; | |
623 | } | |
de7c6d15 | 624 | |
e9355085 JK |
625 | fw = epd_frame_table[epd_dt_index].fw; |
626 | fh = epd_frame_table[epd_dt_index].fh; | |
627 | ||
628 | /* we need to add a spare page because our csum caching scheme walks | |
629 | * to the end of the page */ | |
630 | videomemorysize = PAGE_SIZE + (fw * fh); | |
1b86d775 | 631 | videomemory = vzalloc(videomemorysize); |
de7c6d15 | 632 | if (!videomemory) |
e9355085 | 633 | goto err_fb_rel; |
de7c6d15 | 634 | |
03c33a4f | 635 | info->screen_base = (char __force __iomem *)videomemory; |
de7c6d15 JK |
636 | info->fbops = &metronomefb_ops; |
637 | ||
e9355085 JK |
638 | metronomefb_fix.line_length = fw; |
639 | metronomefb_var.xres = fw; | |
640 | metronomefb_var.yres = fh; | |
641 | metronomefb_var.xres_virtual = fw; | |
642 | metronomefb_var.yres_virtual = fh; | |
de7c6d15 JK |
643 | info->var = metronomefb_var; |
644 | info->fix = metronomefb_fix; | |
645 | info->fix.smem_len = videomemorysize; | |
646 | par = info->par; | |
647 | par->info = info; | |
03c33a4f | 648 | par->board = board; |
e9355085 | 649 | par->dt = epd_dt_index; |
de7c6d15 JK |
650 | init_waitqueue_head(&par->waitq); |
651 | ||
652 | /* this table caches per page csum values. */ | |
653 | par->csum_table = vmalloc(videomemorysize/PAGE_SIZE); | |
654 | if (!par->csum_table) | |
e9355085 JK |
655 | goto err_vfree; |
656 | ||
657 | /* the physical framebuffer that we use is setup by | |
658 | * the platform device driver. It will provide us | |
659 | * with cmd, wfm and image memory in a contiguous area. */ | |
660 | retval = board->setup_fb(par); | |
661 | if (retval) { | |
662 | dev_err(&dev->dev, "Failed to setup fb\n"); | |
de7c6d15 | 663 | goto err_csum_table; |
e9355085 | 664 | } |
de7c6d15 | 665 | |
e9355085 JK |
666 | /* after this point we should have a framebuffer */ |
667 | if ((!par->metromem_wfm) || (!par->metromem_img) || | |
668 | (!par->metromem_dma)) { | |
669 | dev_err(&dev->dev, "fb access failure\n"); | |
670 | retval = -EINVAL; | |
671 | goto err_csum_table; | |
de7c6d15 JK |
672 | } |
673 | ||
674 | info->fix.smem_start = par->metromem_dma; | |
de7c6d15 | 675 | |
03c33a4f JK |
676 | /* load the waveform in. assume mode 3, temp 31 for now |
677 | a) request the waveform file from userspace | |
de7c6d15 | 678 | b) process waveform and decode into metromem */ |
03c33a4f | 679 | retval = request_firmware(&fw_entry, "metronome.wbf", &dev->dev); |
de7c6d15 | 680 | if (retval < 0) { |
28501336 | 681 | dev_err(&dev->dev, "Failed to get waveform\n"); |
e9355085 | 682 | goto err_csum_table; |
de7c6d15 JK |
683 | } |
684 | ||
28501336 JK |
685 | retval = load_waveform((u8 *) fw_entry->data, fw_entry->size, 3, 31, |
686 | par); | |
2422fbba | 687 | release_firmware(fw_entry); |
de7c6d15 | 688 | if (retval < 0) { |
28501336 | 689 | dev_err(&dev->dev, "Failed processing waveform\n"); |
e9355085 | 690 | goto err_csum_table; |
de7c6d15 | 691 | } |
de7c6d15 | 692 | |
e8ddb0cf WY |
693 | retval = board->setup_irq(info); |
694 | if (retval) | |
e9355085 | 695 | goto err_csum_table; |
de7c6d15 JK |
696 | |
697 | retval = metronome_init_regs(par); | |
698 | if (retval < 0) | |
699 | goto err_free_irq; | |
700 | ||
a9b5ff99 | 701 | info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB; |
de7c6d15 JK |
702 | |
703 | info->fbdefio = &metronomefb_defio; | |
704 | fb_deferred_io_init(info); | |
705 | ||
706 | retval = fb_alloc_cmap(&info->cmap, 8, 0); | |
707 | if (retval < 0) { | |
28501336 | 708 | dev_err(&dev->dev, "Failed to allocate colormap\n"); |
e9355085 | 709 | goto err_free_irq; |
de7c6d15 JK |
710 | } |
711 | ||
712 | /* set cmap */ | |
713 | for (i = 0; i < 8; i++) | |
714 | info->cmap.red[i] = (((2*i)+1)*(0xFFFF))/16; | |
715 | memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*8); | |
716 | memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*8); | |
717 | ||
718 | retval = register_framebuffer(info); | |
719 | if (retval < 0) | |
720 | goto err_cmap; | |
721 | ||
722 | platform_set_drvdata(dev, info); | |
723 | ||
28501336 | 724 | dev_dbg(&dev->dev, |
de7c6d15 JK |
725 | "fb%d: Metronome frame buffer device, using %dK of video" |
726 | " memory\n", info->node, videomemorysize >> 10); | |
727 | ||
728 | return 0; | |
729 | ||
730 | err_cmap: | |
731 | fb_dealloc_cmap(&info->cmap); | |
de7c6d15 | 732 | err_free_irq: |
e9355085 | 733 | board->cleanup(par); |
de7c6d15 JK |
734 | err_csum_table: |
735 | vfree(par->csum_table); | |
736 | err_vfree: | |
737 | vfree(videomemory); | |
e9355085 JK |
738 | err_fb_rel: |
739 | framebuffer_release(info); | |
740 | err: | |
03c33a4f | 741 | module_put(board->owner); |
de7c6d15 JK |
742 | return retval; |
743 | } | |
744 | ||
48c68c4f | 745 | static int metronomefb_remove(struct platform_device *dev) |
de7c6d15 JK |
746 | { |
747 | struct fb_info *info = platform_get_drvdata(dev); | |
748 | ||
749 | if (info) { | |
750 | struct metronomefb_par *par = info->par; | |
e9355085 JK |
751 | |
752 | unregister_framebuffer(info); | |
de7c6d15 | 753 | fb_deferred_io_cleanup(info); |
de7c6d15 | 754 | fb_dealloc_cmap(&info->cmap); |
e9355085 | 755 | par->board->cleanup(par); |
de7c6d15 | 756 | vfree(par->csum_table); |
de7c6d15 | 757 | vfree((void __force *)info->screen_base); |
03c33a4f | 758 | module_put(par->board->owner); |
e9355085 | 759 | dev_dbg(&dev->dev, "calling release\n"); |
de7c6d15 JK |
760 | framebuffer_release(info); |
761 | } | |
762 | return 0; | |
763 | } | |
764 | ||
765 | static struct platform_driver metronomefb_driver = { | |
766 | .probe = metronomefb_probe, | |
48c68c4f | 767 | .remove = metronomefb_remove, |
de7c6d15 | 768 | .driver = { |
03c33a4f | 769 | .owner = THIS_MODULE, |
de7c6d15 JK |
770 | .name = "metronomefb", |
771 | }, | |
772 | }; | |
ae6b639d | 773 | module_platform_driver(metronomefb_driver); |
de7c6d15 | 774 | |
e9355085 JK |
775 | module_param(user_wfm_size, uint, 0); |
776 | MODULE_PARM_DESC(user_wfm_size, "Set custom waveform size"); | |
777 | ||
de7c6d15 JK |
778 | MODULE_DESCRIPTION("fbdev driver for Metronome controller"); |
779 | MODULE_AUTHOR("Jaya Kumar"); | |
780 | MODULE_LICENSE("GPL"); |