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0d4ff4df JK |
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/uaccess.h> | |
33 | ||
34 | #include <video/broadsheetfb.h> | |
35 | ||
c1c341a0 JK |
36 | /* track panel specific parameters */ |
37 | struct panel_info { | |
38 | int w; | |
39 | int h; | |
40 | u16 sdcfg; | |
41 | u16 gdcfg; | |
42 | u16 lutfmt; | |
43 | u16 fsynclen; | |
44 | u16 fendfbegin; | |
45 | u16 lsynclen; | |
46 | u16 lendlbegin; | |
47 | u16 pixclk; | |
48 | }; | |
49 | ||
50 | /* table of panel specific parameters to be indexed into by the board drivers */ | |
51 | static struct panel_info panel_table[] = { | |
52 | { /* standard 6" on TFT backplane */ | |
53 | .w = 800, | |
54 | .h = 600, | |
55 | .sdcfg = (100 | (1 << 8) | (1 << 9)), | |
56 | .gdcfg = 2, | |
57 | .lutfmt = (4 | (1 << 7)), | |
58 | .fsynclen = 4, | |
59 | .fendfbegin = (10 << 8) | 4, | |
60 | .lsynclen = 10, | |
61 | .lendlbegin = (100 << 8) | 4, | |
62 | .pixclk = 6, | |
63 | }, | |
64 | { /* custom 3.7" flexible on PET or steel */ | |
65 | .w = 320, | |
66 | .h = 240, | |
67 | .sdcfg = (67 | (0 << 8) | (0 << 9) | (0 << 10) | (0 << 12)), | |
68 | .gdcfg = 3, | |
69 | .lutfmt = (4 | (1 << 7)), | |
70 | .fsynclen = 0, | |
71 | .fendfbegin = (80 << 8) | 4, | |
72 | .lsynclen = 10, | |
73 | .lendlbegin = (80 << 8) | 20, | |
74 | .pixclk = 14, | |
75 | }, | |
76 | { /* standard 9.7" on TFT backplane */ | |
77 | .w = 1200, | |
78 | .h = 825, | |
79 | .sdcfg = (100 | (1 << 8) | (1 << 9) | (0 << 10) | (0 << 12)), | |
80 | .gdcfg = 2, | |
81 | .lutfmt = (4 | (1 << 7)), | |
82 | .fsynclen = 0, | |
83 | .fendfbegin = (4 << 8) | 4, | |
84 | .lsynclen = 4, | |
85 | .lendlbegin = (60 << 8) | 10, | |
86 | .pixclk = 3, | |
87 | }, | |
88 | }; | |
89 | ||
0d4ff4df JK |
90 | #define DPY_W 800 |
91 | #define DPY_H 600 | |
92 | ||
93 | static struct fb_fix_screeninfo broadsheetfb_fix __devinitdata = { | |
94 | .id = "broadsheetfb", | |
95 | .type = FB_TYPE_PACKED_PIXELS, | |
96 | .visual = FB_VISUAL_STATIC_PSEUDOCOLOR, | |
97 | .xpanstep = 0, | |
98 | .ypanstep = 0, | |
99 | .ywrapstep = 0, | |
100 | .line_length = DPY_W, | |
101 | .accel = FB_ACCEL_NONE, | |
102 | }; | |
103 | ||
104 | static struct fb_var_screeninfo broadsheetfb_var __devinitdata = { | |
105 | .xres = DPY_W, | |
106 | .yres = DPY_H, | |
107 | .xres_virtual = DPY_W, | |
108 | .yres_virtual = DPY_H, | |
109 | .bits_per_pixel = 8, | |
110 | .grayscale = 1, | |
111 | .red = { 0, 4, 0 }, | |
112 | .green = { 0, 4, 0 }, | |
113 | .blue = { 0, 4, 0 }, | |
114 | .transp = { 0, 0, 0 }, | |
115 | }; | |
116 | ||
117 | /* main broadsheetfb functions */ | |
118 | static void broadsheet_issue_data(struct broadsheetfb_par *par, u16 data) | |
119 | { | |
120 | par->board->set_ctl(par, BS_WR, 0); | |
121 | par->board->set_hdb(par, data); | |
122 | par->board->set_ctl(par, BS_WR, 1); | |
123 | } | |
124 | ||
125 | static void broadsheet_issue_cmd(struct broadsheetfb_par *par, u16 data) | |
126 | { | |
127 | par->board->set_ctl(par, BS_DC, 0); | |
128 | broadsheet_issue_data(par, data); | |
129 | } | |
130 | ||
131 | static void broadsheet_send_command(struct broadsheetfb_par *par, u16 data) | |
132 | { | |
133 | par->board->wait_for_rdy(par); | |
134 | ||
135 | par->board->set_ctl(par, BS_CS, 0); | |
136 | broadsheet_issue_cmd(par, data); | |
137 | par->board->set_ctl(par, BS_DC, 1); | |
138 | par->board->set_ctl(par, BS_CS, 1); | |
139 | } | |
140 | ||
141 | static void broadsheet_send_cmdargs(struct broadsheetfb_par *par, u16 cmd, | |
142 | int argc, u16 *argv) | |
143 | { | |
144 | int i; | |
145 | ||
146 | par->board->wait_for_rdy(par); | |
147 | ||
148 | par->board->set_ctl(par, BS_CS, 0); | |
149 | broadsheet_issue_cmd(par, cmd); | |
150 | par->board->set_ctl(par, BS_DC, 1); | |
151 | ||
152 | for (i = 0; i < argc; i++) | |
153 | broadsheet_issue_data(par, argv[i]); | |
154 | par->board->set_ctl(par, BS_CS, 1); | |
155 | } | |
156 | ||
157 | static void broadsheet_burst_write(struct broadsheetfb_par *par, int size, | |
158 | u16 *data) | |
159 | { | |
160 | int i; | |
161 | u16 tmp; | |
162 | ||
163 | par->board->set_ctl(par, BS_CS, 0); | |
164 | par->board->set_ctl(par, BS_DC, 1); | |
165 | ||
166 | for (i = 0; i < size; i++) { | |
167 | par->board->set_ctl(par, BS_WR, 0); | |
168 | tmp = (data[i] & 0x0F) << 4; | |
169 | tmp |= (data[i] & 0x0F00) << 4; | |
170 | par->board->set_hdb(par, tmp); | |
171 | par->board->set_ctl(par, BS_WR, 1); | |
172 | } | |
173 | ||
174 | par->board->set_ctl(par, BS_CS, 1); | |
175 | } | |
176 | ||
177 | static u16 broadsheet_get_data(struct broadsheetfb_par *par) | |
178 | { | |
179 | u16 res; | |
180 | /* wait for ready to go hi. (lo is busy) */ | |
181 | par->board->wait_for_rdy(par); | |
182 | ||
183 | /* cs lo, dc lo for cmd, we lo for each data, db as usual */ | |
184 | par->board->set_ctl(par, BS_DC, 1); | |
185 | par->board->set_ctl(par, BS_CS, 0); | |
186 | par->board->set_ctl(par, BS_WR, 0); | |
187 | ||
188 | res = par->board->get_hdb(par); | |
189 | ||
190 | /* strobe wr */ | |
191 | par->board->set_ctl(par, BS_WR, 1); | |
192 | par->board->set_ctl(par, BS_CS, 1); | |
193 | ||
194 | return res; | |
195 | } | |
196 | ||
197 | static void broadsheet_write_reg(struct broadsheetfb_par *par, u16 reg, | |
198 | u16 data) | |
199 | { | |
200 | /* wait for ready to go hi. (lo is busy) */ | |
201 | par->board->wait_for_rdy(par); | |
202 | ||
203 | /* cs lo, dc lo for cmd, we lo for each data, db as usual */ | |
204 | par->board->set_ctl(par, BS_CS, 0); | |
205 | ||
206 | broadsheet_issue_cmd(par, BS_CMD_WR_REG); | |
207 | ||
208 | par->board->set_ctl(par, BS_DC, 1); | |
209 | ||
210 | broadsheet_issue_data(par, reg); | |
211 | broadsheet_issue_data(par, data); | |
212 | ||
213 | par->board->set_ctl(par, BS_CS, 1); | |
214 | } | |
215 | ||
c1c341a0 JK |
216 | static void broadsheet_write_reg32(struct broadsheetfb_par *par, u16 reg, |
217 | u32 data) | |
218 | { | |
219 | broadsheet_write_reg(par, reg, cpu_to_le32(data) & 0xFFFF); | |
220 | broadsheet_write_reg(par, reg + 2, (cpu_to_le32(data) >> 16) & 0xFFFF); | |
221 | } | |
222 | ||
223 | ||
0d4ff4df JK |
224 | static u16 broadsheet_read_reg(struct broadsheetfb_par *par, u16 reg) |
225 | { | |
226 | broadsheet_send_command(par, reg); | |
227 | msleep(100); | |
228 | return broadsheet_get_data(par); | |
229 | } | |
230 | ||
231 | static void __devinit broadsheet_init_display(struct broadsheetfb_par *par) | |
232 | { | |
233 | u16 args[5]; | |
c1c341a0 JK |
234 | int xres = par->info->var.xres; |
235 | int yres = par->info->var.yres; | |
236 | ||
237 | args[0] = panel_table[par->panel_index].w; | |
238 | args[1] = panel_table[par->panel_index].h; | |
239 | args[2] = panel_table[par->panel_index].sdcfg; | |
240 | args[3] = panel_table[par->panel_index].gdcfg; | |
241 | args[4] = panel_table[par->panel_index].lutfmt; | |
0d4ff4df JK |
242 | broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_CFG, 5, args); |
243 | ||
244 | /* did the controller really set it? */ | |
245 | broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_CFG, 5, args); | |
246 | ||
c1c341a0 JK |
247 | args[0] = panel_table[par->panel_index].fsynclen; |
248 | args[1] = panel_table[par->panel_index].fendfbegin; | |
249 | args[2] = panel_table[par->panel_index].lsynclen; | |
250 | args[3] = panel_table[par->panel_index].lendlbegin; | |
251 | args[4] = panel_table[par->panel_index].pixclk; | |
0d4ff4df JK |
252 | broadsheet_send_cmdargs(par, BS_CMD_INIT_DSPE_TMG, 5, args); |
253 | ||
c1c341a0 JK |
254 | broadsheet_write_reg32(par, 0x310, xres*yres*2); |
255 | ||
0d4ff4df JK |
256 | /* setup waveform */ |
257 | args[0] = 0x886; | |
258 | args[1] = 0; | |
259 | broadsheet_send_cmdargs(par, BS_CMD_RD_WFM_INFO, 2, args); | |
260 | ||
261 | broadsheet_send_command(par, BS_CMD_UPD_GDRV_CLR); | |
262 | ||
263 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); | |
264 | ||
265 | broadsheet_write_reg(par, 0x330, 0x84); | |
266 | ||
267 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); | |
268 | ||
269 | args[0] = (0x3 << 4); | |
270 | broadsheet_send_cmdargs(par, BS_CMD_LD_IMG, 1, args); | |
271 | ||
272 | args[0] = 0x154; | |
273 | broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); | |
274 | ||
c1c341a0 JK |
275 | broadsheet_burst_write(par, (panel_table[par->panel_index].w * |
276 | panel_table[par->panel_index].h)/2, | |
277 | (u16 *) par->info->screen_base); | |
0d4ff4df JK |
278 | |
279 | broadsheet_send_command(par, BS_CMD_LD_IMG_END); | |
280 | ||
281 | args[0] = 0x4300; | |
282 | broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); | |
283 | ||
284 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); | |
285 | ||
286 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); | |
287 | ||
288 | par->board->wait_for_rdy(par); | |
289 | } | |
290 | ||
291 | static void __devinit broadsheet_init(struct broadsheetfb_par *par) | |
292 | { | |
293 | broadsheet_send_command(par, BS_CMD_INIT_SYS_RUN); | |
294 | /* the controller needs a second */ | |
295 | msleep(1000); | |
296 | broadsheet_init_display(par); | |
297 | } | |
298 | ||
299 | static void broadsheetfb_dpy_update_pages(struct broadsheetfb_par *par, | |
300 | u16 y1, u16 y2) | |
301 | { | |
302 | u16 args[5]; | |
303 | unsigned char *buf = (unsigned char *)par->info->screen_base; | |
304 | ||
305 | /* y1 must be a multiple of 4 so drop the lower bits */ | |
306 | y1 &= 0xFFFC; | |
307 | /* y2 must be a multiple of 4 , but - 1 so up the lower bits */ | |
308 | y2 |= 0x0003; | |
309 | ||
310 | args[0] = 0x3 << 4; | |
311 | args[1] = 0; | |
312 | args[2] = y1; | |
313 | args[3] = cpu_to_le16(par->info->var.xres); | |
314 | args[4] = y2; | |
315 | broadsheet_send_cmdargs(par, BS_CMD_LD_IMG_AREA, 5, args); | |
316 | ||
317 | args[0] = 0x154; | |
318 | broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); | |
319 | ||
320 | buf += y1 * par->info->var.xres; | |
321 | broadsheet_burst_write(par, ((1 + y2 - y1) * par->info->var.xres)/2, | |
322 | (u16 *) buf); | |
323 | ||
324 | broadsheet_send_command(par, BS_CMD_LD_IMG_END); | |
325 | ||
326 | args[0] = 0x4300; | |
327 | broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); | |
328 | ||
329 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); | |
330 | ||
331 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); | |
332 | ||
333 | par->board->wait_for_rdy(par); | |
334 | ||
335 | } | |
336 | ||
337 | static void broadsheetfb_dpy_update(struct broadsheetfb_par *par) | |
338 | { | |
339 | u16 args[5]; | |
340 | ||
341 | args[0] = 0x3 << 4; | |
342 | broadsheet_send_cmdargs(par, BS_CMD_LD_IMG, 1, args); | |
343 | ||
344 | args[0] = 0x154; | |
345 | broadsheet_send_cmdargs(par, BS_CMD_WR_REG, 1, args); | |
c1c341a0 JK |
346 | broadsheet_burst_write(par, (panel_table[par->panel_index].w * |
347 | panel_table[par->panel_index].h)/2, | |
348 | (u16 *) par->info->screen_base); | |
0d4ff4df JK |
349 | |
350 | broadsheet_send_command(par, BS_CMD_LD_IMG_END); | |
351 | ||
352 | args[0] = 0x4300; | |
353 | broadsheet_send_cmdargs(par, BS_CMD_UPD_FULL, 1, args); | |
354 | ||
355 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_TRG); | |
356 | ||
357 | broadsheet_send_command(par, BS_CMD_WAIT_DSPE_FREND); | |
358 | ||
359 | par->board->wait_for_rdy(par); | |
360 | ||
361 | } | |
362 | ||
363 | /* this is called back from the deferred io workqueue */ | |
364 | static void broadsheetfb_dpy_deferred_io(struct fb_info *info, | |
365 | struct list_head *pagelist) | |
366 | { | |
367 | u16 y1 = 0, h = 0; | |
368 | int prev_index = -1; | |
369 | struct page *cur; | |
370 | struct fb_deferred_io *fbdefio = info->fbdefio; | |
371 | int h_inc; | |
372 | u16 yres = info->var.yres; | |
373 | u16 xres = info->var.xres; | |
374 | ||
375 | /* height increment is fixed per page */ | |
376 | h_inc = DIV_ROUND_UP(PAGE_SIZE , xres); | |
377 | ||
378 | /* walk the written page list and swizzle the data */ | |
379 | list_for_each_entry(cur, &fbdefio->pagelist, lru) { | |
380 | if (prev_index < 0) { | |
381 | /* just starting so assign first page */ | |
382 | y1 = (cur->index << PAGE_SHIFT) / xres; | |
383 | h = h_inc; | |
384 | } else if ((prev_index + 1) == cur->index) { | |
385 | /* this page is consecutive so increase our height */ | |
386 | h += h_inc; | |
387 | } else { | |
388 | /* page not consecutive, issue previous update first */ | |
389 | broadsheetfb_dpy_update_pages(info->par, y1, y1 + h); | |
390 | /* start over with our non consecutive page */ | |
391 | y1 = (cur->index << PAGE_SHIFT) / xres; | |
392 | h = h_inc; | |
393 | } | |
394 | prev_index = cur->index; | |
395 | } | |
396 | ||
397 | /* if we still have any pages to update we do so now */ | |
398 | if (h >= yres) { | |
399 | /* its a full screen update, just do it */ | |
400 | broadsheetfb_dpy_update(info->par); | |
401 | } else { | |
402 | broadsheetfb_dpy_update_pages(info->par, y1, | |
403 | min((u16) (y1 + h), yres)); | |
404 | } | |
405 | } | |
406 | ||
407 | static void broadsheetfb_fillrect(struct fb_info *info, | |
408 | const struct fb_fillrect *rect) | |
409 | { | |
410 | struct broadsheetfb_par *par = info->par; | |
411 | ||
412 | sys_fillrect(info, rect); | |
413 | ||
414 | broadsheetfb_dpy_update(par); | |
415 | } | |
416 | ||
417 | static void broadsheetfb_copyarea(struct fb_info *info, | |
418 | const struct fb_copyarea *area) | |
419 | { | |
420 | struct broadsheetfb_par *par = info->par; | |
421 | ||
422 | sys_copyarea(info, area); | |
423 | ||
424 | broadsheetfb_dpy_update(par); | |
425 | } | |
426 | ||
427 | static void broadsheetfb_imageblit(struct fb_info *info, | |
428 | const struct fb_image *image) | |
429 | { | |
430 | struct broadsheetfb_par *par = info->par; | |
431 | ||
432 | sys_imageblit(info, image); | |
433 | ||
434 | broadsheetfb_dpy_update(par); | |
435 | } | |
436 | ||
437 | /* | |
438 | * this is the slow path from userspace. they can seek and write to | |
439 | * the fb. it's inefficient to do anything less than a full screen draw | |
440 | */ | |
441 | static ssize_t broadsheetfb_write(struct fb_info *info, const char __user *buf, | |
442 | size_t count, loff_t *ppos) | |
443 | { | |
444 | struct broadsheetfb_par *par = info->par; | |
445 | unsigned long p = *ppos; | |
446 | void *dst; | |
447 | int err = 0; | |
448 | unsigned long total_size; | |
449 | ||
450 | if (info->state != FBINFO_STATE_RUNNING) | |
451 | return -EPERM; | |
452 | ||
453 | total_size = info->fix.smem_len; | |
454 | ||
455 | if (p > total_size) | |
456 | return -EFBIG; | |
457 | ||
458 | if (count > total_size) { | |
459 | err = -EFBIG; | |
460 | count = total_size; | |
461 | } | |
462 | ||
463 | if (count + p > total_size) { | |
464 | if (!err) | |
465 | err = -ENOSPC; | |
466 | ||
467 | count = total_size - p; | |
468 | } | |
469 | ||
470 | dst = (void *)(info->screen_base + p); | |
471 | ||
472 | if (copy_from_user(dst, buf, count)) | |
473 | err = -EFAULT; | |
474 | ||
475 | if (!err) | |
476 | *ppos += count; | |
477 | ||
478 | broadsheetfb_dpy_update(par); | |
479 | ||
480 | return (err) ? err : count; | |
481 | } | |
482 | ||
483 | static struct fb_ops broadsheetfb_ops = { | |
484 | .owner = THIS_MODULE, | |
485 | .fb_read = fb_sys_read, | |
486 | .fb_write = broadsheetfb_write, | |
487 | .fb_fillrect = broadsheetfb_fillrect, | |
488 | .fb_copyarea = broadsheetfb_copyarea, | |
489 | .fb_imageblit = broadsheetfb_imageblit, | |
490 | }; | |
491 | ||
492 | static struct fb_deferred_io broadsheetfb_defio = { | |
493 | .delay = HZ/4, | |
494 | .deferred_io = broadsheetfb_dpy_deferred_io, | |
495 | }; | |
496 | ||
497 | static int __devinit broadsheetfb_probe(struct platform_device *dev) | |
498 | { | |
499 | struct fb_info *info; | |
500 | struct broadsheet_board *board; | |
501 | int retval = -ENOMEM; | |
502 | int videomemorysize; | |
503 | unsigned char *videomemory; | |
504 | struct broadsheetfb_par *par; | |
505 | int i; | |
c1c341a0 JK |
506 | int dpyw, dpyh; |
507 | int panel_index; | |
0d4ff4df JK |
508 | |
509 | /* pick up board specific routines */ | |
510 | board = dev->dev.platform_data; | |
511 | if (!board) | |
512 | return -EINVAL; | |
513 | ||
514 | /* try to count device specific driver, if can't, platform recalls */ | |
515 | if (!try_module_get(board->owner)) | |
516 | return -ENODEV; | |
517 | ||
518 | info = framebuffer_alloc(sizeof(struct broadsheetfb_par), &dev->dev); | |
519 | if (!info) | |
520 | goto err; | |
521 | ||
c1c341a0 JK |
522 | switch (board->get_panel_type()) { |
523 | case 37: | |
524 | panel_index = 1; | |
525 | break; | |
526 | case 97: | |
527 | panel_index = 2; | |
528 | break; | |
529 | case 6: | |
530 | default: | |
531 | panel_index = 0; | |
532 | break; | |
533 | } | |
534 | ||
535 | dpyw = panel_table[panel_index].w; | |
536 | dpyh = panel_table[panel_index].h; | |
537 | ||
538 | videomemorysize = roundup((dpyw*dpyh), PAGE_SIZE); | |
539 | ||
0d4ff4df JK |
540 | videomemory = vmalloc(videomemorysize); |
541 | if (!videomemory) | |
542 | goto err_fb_rel; | |
543 | ||
544 | memset(videomemory, 0, videomemorysize); | |
545 | ||
546 | info->screen_base = (char *)videomemory; | |
547 | info->fbops = &broadsheetfb_ops; | |
548 | ||
c1c341a0 JK |
549 | broadsheetfb_var.xres = dpyw; |
550 | broadsheetfb_var.yres = dpyh; | |
551 | broadsheetfb_var.xres_virtual = dpyw; | |
552 | broadsheetfb_var.yres_virtual = dpyh; | |
0d4ff4df | 553 | info->var = broadsheetfb_var; |
c1c341a0 JK |
554 | |
555 | broadsheetfb_fix.line_length = dpyw; | |
0d4ff4df JK |
556 | info->fix = broadsheetfb_fix; |
557 | info->fix.smem_len = videomemorysize; | |
558 | par = info->par; | |
c1c341a0 | 559 | par->panel_index = panel_index; |
0d4ff4df JK |
560 | par->info = info; |
561 | par->board = board; | |
562 | par->write_reg = broadsheet_write_reg; | |
563 | par->read_reg = broadsheet_read_reg; | |
564 | init_waitqueue_head(&par->waitq); | |
565 | ||
a9b5ff99 | 566 | info->flags = FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB; |
0d4ff4df JK |
567 | |
568 | info->fbdefio = &broadsheetfb_defio; | |
569 | fb_deferred_io_init(info); | |
570 | ||
571 | retval = fb_alloc_cmap(&info->cmap, 16, 0); | |
572 | if (retval < 0) { | |
573 | dev_err(&dev->dev, "Failed to allocate colormap\n"); | |
574 | goto err_vfree; | |
575 | } | |
576 | ||
577 | /* set cmap */ | |
578 | for (i = 0; i < 16; i++) | |
579 | info->cmap.red[i] = (((2*i)+1)*(0xFFFF))/32; | |
580 | memcpy(info->cmap.green, info->cmap.red, sizeof(u16)*16); | |
581 | memcpy(info->cmap.blue, info->cmap.red, sizeof(u16)*16); | |
582 | ||
583 | retval = par->board->setup_irq(info); | |
584 | if (retval < 0) | |
585 | goto err_cmap; | |
586 | ||
587 | /* this inits the dpy */ | |
588 | retval = board->init(par); | |
589 | if (retval < 0) | |
590 | goto err_free_irq; | |
591 | ||
592 | broadsheet_init(par); | |
593 | ||
594 | retval = register_framebuffer(info); | |
595 | if (retval < 0) | |
596 | goto err_free_irq; | |
597 | platform_set_drvdata(dev, info); | |
598 | ||
599 | printk(KERN_INFO | |
600 | "fb%d: Broadsheet frame buffer, using %dK of video memory\n", | |
601 | info->node, videomemorysize >> 10); | |
602 | ||
603 | ||
604 | return 0; | |
605 | ||
606 | err_free_irq: | |
607 | board->cleanup(par); | |
608 | err_cmap: | |
609 | fb_dealloc_cmap(&info->cmap); | |
610 | err_vfree: | |
611 | vfree(videomemory); | |
612 | err_fb_rel: | |
613 | framebuffer_release(info); | |
614 | err: | |
615 | module_put(board->owner); | |
616 | return retval; | |
617 | ||
618 | } | |
619 | ||
620 | static int __devexit broadsheetfb_remove(struct platform_device *dev) | |
621 | { | |
622 | struct fb_info *info = platform_get_drvdata(dev); | |
623 | ||
624 | if (info) { | |
625 | struct broadsheetfb_par *par = info->par; | |
626 | unregister_framebuffer(info); | |
627 | fb_deferred_io_cleanup(info); | |
628 | par->board->cleanup(par); | |
629 | fb_dealloc_cmap(&info->cmap); | |
630 | vfree((void *)info->screen_base); | |
631 | module_put(par->board->owner); | |
632 | framebuffer_release(info); | |
633 | } | |
634 | return 0; | |
635 | } | |
636 | ||
637 | static struct platform_driver broadsheetfb_driver = { | |
638 | .probe = broadsheetfb_probe, | |
639 | .remove = broadsheetfb_remove, | |
640 | .driver = { | |
641 | .owner = THIS_MODULE, | |
642 | .name = "broadsheetfb", | |
643 | }, | |
644 | }; | |
645 | ||
646 | static int __init broadsheetfb_init(void) | |
647 | { | |
648 | return platform_driver_register(&broadsheetfb_driver); | |
649 | } | |
650 | ||
651 | static void __exit broadsheetfb_exit(void) | |
652 | { | |
653 | platform_driver_unregister(&broadsheetfb_driver); | |
654 | } | |
655 | ||
656 | module_init(broadsheetfb_init); | |
657 | module_exit(broadsheetfb_exit); | |
658 | ||
659 | MODULE_DESCRIPTION("fbdev driver for Broadsheet controller"); | |
660 | MODULE_AUTHOR("Jaya Kumar"); | |
661 | MODULE_LICENSE("GPL"); |