/drivers/video/pnx4008/sdum.c
C | 872 lines | 679 code | 155 blank | 38 comment | 137 complexity | 3b961d86fa481c7ed93ade02f3f15503 MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
1/*
2 * drivers/video/pnx4008/sdum.c
3 *
4 * Display Update Master support
5 *
6 * Authors: Grigory Tolstolytkin <gtolstolytkin@ru.mvista.com>
7 * Vitaly Wool <vitalywool@gmail.com>
8 * Based on Philips Semiconductors's code
9 *
10 * Copyrght (c) 2005-2006 MontaVista Software, Inc.
11 * Copyright (c) 2005 Philips Semiconductors
12 * This file is licensed under the terms of the GNU General Public License
13 * version 2. This program is licensed "as is" without any warranty of any
14 * kind, whether express or implied.
15 */
16
17#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/errno.h>
20#include <linux/string.h>
21#include <linux/mm.h>
22#include <linux/tty.h>
23#include <linux/vmalloc.h>
24#include <linux/delay.h>
25#include <linux/interrupt.h>
26#include <linux/platform_device.h>
27#include <linux/fb.h>
28#include <linux/init.h>
29#include <linux/dma-mapping.h>
30#include <linux/clk.h>
31#include <linux/gfp.h>
32#include <asm/uaccess.h>
33#include <mach/gpio.h>
34
35#include "sdum.h"
36#include "fbcommon.h"
37#include "dum.h"
38
39/* Framebuffers we have */
40
41static struct pnx4008_fb_addr {
42 int fb_type;
43 long addr_offset;
44 long fb_length;
45} fb_addr[] = {
46 [0] = {
47 FB_TYPE_YUV, 0, 0xB0000
48 },
49 [1] = {
50 FB_TYPE_RGB, 0xB0000, 0x50000
51 },
52};
53
54static struct dum_data {
55 u32 lcd_phys_start;
56 u32 lcd_virt_start;
57 u32 slave_phys_base;
58 u32 *slave_virt_base;
59 int fb_owning_channel[MAX_DUM_CHANNELS];
60 struct dumchannel_uf chan_uf_store[MAX_DUM_CHANNELS];
61} dum_data;
62
63/* Different local helper functions */
64
65static u32 nof_pixels_dx(struct dum_ch_setup *ch_setup)
66{
67 return (ch_setup->xmax - ch_setup->xmin + 1);
68}
69
70static u32 nof_pixels_dy(struct dum_ch_setup *ch_setup)
71{
72 return (ch_setup->ymax - ch_setup->ymin + 1);
73}
74
75static u32 nof_pixels_dxy(struct dum_ch_setup *ch_setup)
76{
77 return (nof_pixels_dx(ch_setup) * nof_pixels_dy(ch_setup));
78}
79
80static u32 nof_bytes(struct dum_ch_setup *ch_setup)
81{
82 u32 r = nof_pixels_dxy(ch_setup);
83 switch (ch_setup->format) {
84 case RGB888:
85 case RGB666:
86 r *= 4;
87 break;
88
89 default:
90 r *= 2;
91 break;
92 }
93 return r;
94}
95
96static u32 build_command(int disp_no, u32 reg, u32 val)
97{
98 return ((disp_no << 26) | BIT(25) | (val << 16) | (disp_no << 10) |
99 (reg << 0));
100}
101
102static u32 build_double_index(int disp_no, u32 val)
103{
104 return ((disp_no << 26) | (val << 16) | (disp_no << 10) | (val << 0));
105}
106
107static void build_disp_window(struct dum_ch_setup * ch_setup, struct disp_window * dw)
108{
109 dw->ymin = ch_setup->ymin;
110 dw->ymax = ch_setup->ymax;
111 dw->xmin_l = ch_setup->xmin & 0xFF;
112 dw->xmin_h = (ch_setup->xmin & BIT(8)) >> 8;
113 dw->xmax_l = ch_setup->xmax & 0xFF;
114 dw->xmax_h = (ch_setup->xmax & BIT(8)) >> 8;
115}
116
117static int put_channel(struct dumchannel chan)
118{
119 int i = chan.channelnr;
120
121 if (i < 0 || i > MAX_DUM_CHANNELS)
122 return -EINVAL;
123 else {
124 DUM_CH_MIN(i) = chan.dum_ch_min;
125 DUM_CH_MAX(i) = chan.dum_ch_max;
126 DUM_CH_CONF(i) = chan.dum_ch_conf;
127 DUM_CH_CTRL(i) = chan.dum_ch_ctrl;
128 }
129
130 return 0;
131}
132
133static void clear_channel(int channr)
134{
135 struct dumchannel chan;
136
137 chan.channelnr = channr;
138 chan.dum_ch_min = 0;
139 chan.dum_ch_max = 0;
140 chan.dum_ch_conf = 0;
141 chan.dum_ch_ctrl = 0;
142
143 put_channel(chan);
144}
145
146static int put_cmd_string(struct cmdstring cmds)
147{
148 u16 *cmd_str_virtaddr;
149 u32 *cmd_ptr0_virtaddr;
150 u32 cmd_str_physaddr;
151
152 int i = cmds.channelnr;
153
154 if (i < 0 || i > MAX_DUM_CHANNELS)
155 return -EINVAL;
156 else if ((cmd_ptr0_virtaddr =
157 (int *)ioremap_nocache(DUM_COM_BASE,
158 sizeof(int) * MAX_DUM_CHANNELS)) ==
159 NULL)
160 return -EIOREMAPFAILED;
161 else {
162 cmd_str_physaddr = ioread32(&cmd_ptr0_virtaddr[cmds.channelnr]);
163 if ((cmd_str_virtaddr =
164 (u16 *) ioremap_nocache(cmd_str_physaddr,
165 sizeof(cmds))) == NULL) {
166 iounmap(cmd_ptr0_virtaddr);
167 return -EIOREMAPFAILED;
168 } else {
169 int t;
170 for (t = 0; t < 8; t++)
171 iowrite16(*((u16 *)&cmds.prestringlen + t),
172 cmd_str_virtaddr + t);
173
174 for (t = 0; t < cmds.prestringlen / 2; t++)
175 iowrite16(*((u16 *)&cmds.precmd + t),
176 cmd_str_virtaddr + t + 8);
177
178 for (t = 0; t < cmds.poststringlen / 2; t++)
179 iowrite16(*((u16 *)&cmds.postcmd + t),
180 cmd_str_virtaddr + t + 8 +
181 cmds.prestringlen / 2);
182
183 iounmap(cmd_ptr0_virtaddr);
184 iounmap(cmd_str_virtaddr);
185 }
186 }
187
188 return 0;
189}
190
191static u32 dum_ch_setup(int ch_no, struct dum_ch_setup * ch_setup)
192{
193 struct cmdstring cmds_c;
194 struct cmdstring *cmds = &cmds_c;
195 struct disp_window dw;
196 int standard;
197 u32 orientation = 0;
198 struct dumchannel chan = { 0 };
199 int ret;
200
201 if ((ch_setup->xmirror) || (ch_setup->ymirror) || (ch_setup->rotate)) {
202 standard = 0;
203
204 orientation = BIT(1); /* always set 9-bit-bus */
205 if (ch_setup->xmirror)
206 orientation |= BIT(4);
207 if (ch_setup->ymirror)
208 orientation |= BIT(3);
209 if (ch_setup->rotate)
210 orientation |= BIT(0);
211 } else
212 standard = 1;
213
214 cmds->channelnr = ch_no;
215
216 /* build command string header */
217 if (standard) {
218 cmds->prestringlen = 32;
219 cmds->poststringlen = 0;
220 } else {
221 cmds->prestringlen = 48;
222 cmds->poststringlen = 16;
223 }
224
225 cmds->format =
226 (u16) ((ch_setup->disp_no << 4) | (BIT(3)) | (ch_setup->format));
227 cmds->reserved = 0x0;
228 cmds->startaddr_low = (ch_setup->minadr & 0xFFFF);
229 cmds->startaddr_high = (ch_setup->minadr >> 16);
230
231 if ((ch_setup->minadr == 0) && (ch_setup->maxadr == 0)
232 && (ch_setup->xmin == 0)
233 && (ch_setup->ymin == 0) && (ch_setup->xmax == 0)
234 && (ch_setup->ymax == 0)) {
235 cmds->pixdatlen_low = 0;
236 cmds->pixdatlen_high = 0;
237 } else {
238 u32 nbytes = nof_bytes(ch_setup);
239 cmds->pixdatlen_low = (nbytes & 0xFFFF);
240 cmds->pixdatlen_high = (nbytes >> 16);
241 }
242
243 if (ch_setup->slave_trans)
244 cmds->pixdatlen_high |= BIT(15);
245
246 /* build pre-string */
247 build_disp_window(ch_setup, &dw);
248
249 if (standard) {
250 cmds->precmd[0] =
251 build_command(ch_setup->disp_no, DISP_XMIN_L_REG, 0x99);
252 cmds->precmd[1] =
253 build_command(ch_setup->disp_no, DISP_XMIN_L_REG,
254 dw.xmin_l);
255 cmds->precmd[2] =
256 build_command(ch_setup->disp_no, DISP_XMIN_H_REG,
257 dw.xmin_h);
258 cmds->precmd[3] =
259 build_command(ch_setup->disp_no, DISP_YMIN_REG, dw.ymin);
260 cmds->precmd[4] =
261 build_command(ch_setup->disp_no, DISP_XMAX_L_REG,
262 dw.xmax_l);
263 cmds->precmd[5] =
264 build_command(ch_setup->disp_no, DISP_XMAX_H_REG,
265 dw.xmax_h);
266 cmds->precmd[6] =
267 build_command(ch_setup->disp_no, DISP_YMAX_REG, dw.ymax);
268 cmds->precmd[7] =
269 build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
270 } else {
271 if (dw.xmin_l == ch_no)
272 cmds->precmd[0] =
273 build_command(ch_setup->disp_no, DISP_XMIN_L_REG,
274 0x99);
275 else
276 cmds->precmd[0] =
277 build_command(ch_setup->disp_no, DISP_XMIN_L_REG,
278 ch_no);
279
280 cmds->precmd[1] =
281 build_command(ch_setup->disp_no, DISP_XMIN_L_REG,
282 dw.xmin_l);
283 cmds->precmd[2] =
284 build_command(ch_setup->disp_no, DISP_XMIN_H_REG,
285 dw.xmin_h);
286 cmds->precmd[3] =
287 build_command(ch_setup->disp_no, DISP_YMIN_REG, dw.ymin);
288 cmds->precmd[4] =
289 build_command(ch_setup->disp_no, DISP_XMAX_L_REG,
290 dw.xmax_l);
291 cmds->precmd[5] =
292 build_command(ch_setup->disp_no, DISP_XMAX_H_REG,
293 dw.xmax_h);
294 cmds->precmd[6] =
295 build_command(ch_setup->disp_no, DISP_YMAX_REG, dw.ymax);
296 cmds->precmd[7] =
297 build_command(ch_setup->disp_no, DISP_1_REG, orientation);
298 cmds->precmd[8] =
299 build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
300 cmds->precmd[9] =
301 build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
302 cmds->precmd[0xA] =
303 build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
304 cmds->precmd[0xB] =
305 build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
306 cmds->postcmd[0] =
307 build_command(ch_setup->disp_no, DISP_1_REG, BIT(1));
308 cmds->postcmd[1] =
309 build_command(ch_setup->disp_no, DISP_DUMMY1_REG, 1);
310 cmds->postcmd[2] =
311 build_command(ch_setup->disp_no, DISP_DUMMY1_REG, 2);
312 cmds->postcmd[3] =
313 build_command(ch_setup->disp_no, DISP_DUMMY1_REG, 3);
314 }
315
316 if ((ret = put_cmd_string(cmds_c)) != 0) {
317 return ret;
318 }
319
320 chan.channelnr = cmds->channelnr;
321 chan.dum_ch_min = ch_setup->dirtybuffer + ch_setup->minadr;
322 chan.dum_ch_max = ch_setup->dirtybuffer + ch_setup->maxadr;
323 chan.dum_ch_conf = 0x002;
324 chan.dum_ch_ctrl = 0x04;
325
326 put_channel(chan);
327
328 return 0;
329}
330
331static u32 display_open(int ch_no, int auto_update, u32 * dirty_buffer,
332 u32 * frame_buffer, u32 xpos, u32 ypos, u32 w, u32 h)
333{
334
335 struct dum_ch_setup k;
336 int ret;
337
338 /* keep width & height within display area */
339 if ((xpos + w) > DISP_MAX_X_SIZE)
340 w = DISP_MAX_X_SIZE - xpos;
341
342 if ((ypos + h) > DISP_MAX_Y_SIZE)
343 h = DISP_MAX_Y_SIZE - ypos;
344
345 /* assume 1 display only */
346 k.disp_no = 0;
347 k.xmin = xpos;
348 k.ymin = ypos;
349 k.xmax = xpos + (w - 1);
350 k.ymax = ypos + (h - 1);
351
352 /* adjust min and max values if necessary */
353 if (k.xmin > DISP_MAX_X_SIZE - 1)
354 k.xmin = DISP_MAX_X_SIZE - 1;
355 if (k.ymin > DISP_MAX_Y_SIZE - 1)
356 k.ymin = DISP_MAX_Y_SIZE - 1;
357
358 if (k.xmax > DISP_MAX_X_SIZE - 1)
359 k.xmax = DISP_MAX_X_SIZE - 1;
360 if (k.ymax > DISP_MAX_Y_SIZE - 1)
361 k.ymax = DISP_MAX_Y_SIZE - 1;
362
363 k.xmirror = 0;
364 k.ymirror = 0;
365 k.rotate = 0;
366 k.minadr = (u32) frame_buffer;
367 k.maxadr = (u32) frame_buffer + (((w - 1) << 10) | ((h << 2) - 2));
368 k.pad = PAD_1024;
369 k.dirtybuffer = (u32) dirty_buffer;
370 k.format = RGB888;
371 k.hwdirty = 0;
372 k.slave_trans = 0;
373
374 ret = dum_ch_setup(ch_no, &k);
375
376 return ret;
377}
378
379static void lcd_reset(void)
380{
381 u32 *dum_pio_base = (u32 *)IO_ADDRESS(PNX4008_PIO_BASE);
382
383 udelay(1);
384 iowrite32(BIT(19), &dum_pio_base[2]);
385 udelay(1);
386 iowrite32(BIT(19), &dum_pio_base[1]);
387 udelay(1);
388}
389
390static int dum_init(struct platform_device *pdev)
391{
392 struct clk *clk;
393
394 /* enable DUM clock */
395 clk = clk_get(&pdev->dev, "dum_ck");
396 if (IS_ERR(clk)) {
397 printk(KERN_ERR "pnx4008_dum: Unable to access DUM clock\n");
398 return PTR_ERR(clk);
399 }
400
401 clk_set_rate(clk, 1);
402 clk_put(clk);
403
404 DUM_CTRL = V_DUM_RESET;
405
406 /* set priority to "round-robin". All other params to "false" */
407 DUM_CONF = BIT(9);
408
409 /* Display 1 */
410 DUM_WTCFG1 = PNX4008_DUM_WT_CFG;
411 DUM_RTCFG1 = PNX4008_DUM_RT_CFG;
412 DUM_TCFG = PNX4008_DUM_T_CFG;
413
414 return 0;
415}
416
417static void dum_chan_init(void)
418{
419 int i = 0, ch = 0;
420 u32 *cmdptrs;
421 u32 *cmdstrings;
422
423 DUM_COM_BASE =
424 CMDSTRING_BASEADDR + BYTES_PER_CMDSTRING * NR_OF_CMDSTRINGS;
425
426 if ((cmdptrs =
427 (u32 *) ioremap_nocache(DUM_COM_BASE,
428 sizeof(u32) * NR_OF_CMDSTRINGS)) == NULL)
429 return;
430
431 for (ch = 0; ch < NR_OF_CMDSTRINGS; ch++)
432 iowrite32(CMDSTRING_BASEADDR + BYTES_PER_CMDSTRING * ch,
433 cmdptrs + ch);
434
435 for (ch = 0; ch < MAX_DUM_CHANNELS; ch++)
436 clear_channel(ch);
437
438 /* Clear the cmdstrings */
439 cmdstrings =
440 (u32 *)ioremap_nocache(*cmdptrs,
441 BYTES_PER_CMDSTRING * NR_OF_CMDSTRINGS);
442
443 if (!cmdstrings)
444 goto out;
445
446 for (i = 0; i < NR_OF_CMDSTRINGS * BYTES_PER_CMDSTRING / sizeof(u32);
447 i++)
448 iowrite32(0, cmdstrings + i);
449
450 iounmap((u32 *)cmdstrings);
451
452out:
453 iounmap((u32 *)cmdptrs);
454}
455
456static void lcd_init(void)
457{
458 lcd_reset();
459
460 DUM_OUTP_FORMAT1 = 0; /* RGB666 */
461
462 udelay(1);
463 iowrite32(V_LCD_STANDBY_OFF, dum_data.slave_virt_base);
464 udelay(1);
465 iowrite32(V_LCD_USE_9BIT_BUS, dum_data.slave_virt_base);
466 udelay(1);
467 iowrite32(V_LCD_SYNC_RISE_L, dum_data.slave_virt_base);
468 udelay(1);
469 iowrite32(V_LCD_SYNC_RISE_H, dum_data.slave_virt_base);
470 udelay(1);
471 iowrite32(V_LCD_SYNC_FALL_L, dum_data.slave_virt_base);
472 udelay(1);
473 iowrite32(V_LCD_SYNC_FALL_H, dum_data.slave_virt_base);
474 udelay(1);
475 iowrite32(V_LCD_SYNC_ENABLE, dum_data.slave_virt_base);
476 udelay(1);
477 iowrite32(V_LCD_DISPLAY_ON, dum_data.slave_virt_base);
478 udelay(1);
479}
480
481/* Interface exported to framebuffer drivers */
482
483int pnx4008_get_fb_addresses(int fb_type, void **virt_addr,
484 dma_addr_t *phys_addr, int *fb_length)
485{
486 int i;
487 int ret = -1;
488 for (i = 0; i < ARRAY_SIZE(fb_addr); i++)
489 if (fb_addr[i].fb_type == fb_type) {
490 *virt_addr = (void *)(dum_data.lcd_virt_start +
491 fb_addr[i].addr_offset);
492 *phys_addr =
493 dum_data.lcd_phys_start + fb_addr[i].addr_offset;
494 *fb_length = fb_addr[i].fb_length;
495 ret = 0;
496 break;
497 }
498
499 return ret;
500}
501
502EXPORT_SYMBOL(pnx4008_get_fb_addresses);
503
504int pnx4008_alloc_dum_channel(int dev_id)
505{
506 int i = 0;
507
508 while ((i < MAX_DUM_CHANNELS) && (dum_data.fb_owning_channel[i] != -1))
509 i++;
510
511 if (i == MAX_DUM_CHANNELS)
512 return -ENORESOURCESLEFT;
513 else {
514 dum_data.fb_owning_channel[i] = dev_id;
515 return i;
516 }
517}
518
519EXPORT_SYMBOL(pnx4008_alloc_dum_channel);
520
521int pnx4008_free_dum_channel(int channr, int dev_id)
522{
523 if (channr < 0 || channr > MAX_DUM_CHANNELS)
524 return -EINVAL;
525 else if (dum_data.fb_owning_channel[channr] != dev_id)
526 return -EFBNOTOWNER;
527 else {
528 clear_channel(channr);
529 dum_data.fb_owning_channel[channr] = -1;
530 }
531
532 return 0;
533}
534
535EXPORT_SYMBOL(pnx4008_free_dum_channel);
536
537int pnx4008_put_dum_channel_uf(struct dumchannel_uf chan_uf, int dev_id)
538{
539 int i = chan_uf.channelnr;
540 int ret;
541
542 if (i < 0 || i > MAX_DUM_CHANNELS)
543 return -EINVAL;
544 else if (dum_data.fb_owning_channel[i] != dev_id)
545 return -EFBNOTOWNER;
546 else if ((ret =
547 display_open(chan_uf.channelnr, 0, chan_uf.dirty,
548 chan_uf.source, chan_uf.y_offset,
549 chan_uf.x_offset, chan_uf.height,
550 chan_uf.width)) != 0)
551 return ret;
552 else {
553 dum_data.chan_uf_store[i].dirty = chan_uf.dirty;
554 dum_data.chan_uf_store[i].source = chan_uf.source;
555 dum_data.chan_uf_store[i].x_offset = chan_uf.x_offset;
556 dum_data.chan_uf_store[i].y_offset = chan_uf.y_offset;
557 dum_data.chan_uf_store[i].width = chan_uf.width;
558 dum_data.chan_uf_store[i].height = chan_uf.height;
559 }
560
561 return 0;
562}
563
564EXPORT_SYMBOL(pnx4008_put_dum_channel_uf);
565
566int pnx4008_set_dum_channel_sync(int channr, int val, int dev_id)
567{
568 if (channr < 0 || channr > MAX_DUM_CHANNELS)
569 return -EINVAL;
570 else if (dum_data.fb_owning_channel[channr] != dev_id)
571 return -EFBNOTOWNER;
572 else {
573 if (val == CONF_SYNC_ON) {
574 DUM_CH_CONF(channr) |= CONF_SYNCENABLE;
575 DUM_CH_CONF(channr) |= DUM_CHANNEL_CFG_SYNC_MASK |
576 DUM_CHANNEL_CFG_SYNC_MASK_SET;
577 } else if (val == CONF_SYNC_OFF)
578 DUM_CH_CONF(channr) &= ~CONF_SYNCENABLE;
579 else
580 return -EINVAL;
581 }
582
583 return 0;
584}
585
586EXPORT_SYMBOL(pnx4008_set_dum_channel_sync);
587
588int pnx4008_set_dum_channel_dirty_detect(int channr, int val, int dev_id)
589{
590 if (channr < 0 || channr > MAX_DUM_CHANNELS)
591 return -EINVAL;
592 else if (dum_data.fb_owning_channel[channr] != dev_id)
593 return -EFBNOTOWNER;
594 else {
595 if (val == CONF_DIRTYDETECTION_ON)
596 DUM_CH_CONF(channr) |= CONF_DIRTYENABLE;
597 else if (val == CONF_DIRTYDETECTION_OFF)
598 DUM_CH_CONF(channr) &= ~CONF_DIRTYENABLE;
599 else
600 return -EINVAL;
601 }
602
603 return 0;
604}
605
606EXPORT_SYMBOL(pnx4008_set_dum_channel_dirty_detect);
607
608#if 0 /* Functions not used currently, but likely to be used in future */
609
610static int get_channel(struct dumchannel *p_chan)
611{
612 int i = p_chan->channelnr;
613
614 if (i < 0 || i > MAX_DUM_CHANNELS)
615 return -EINVAL;
616 else {
617 p_chan->dum_ch_min = DUM_CH_MIN(i);
618 p_chan->dum_ch_max = DUM_CH_MAX(i);
619 p_chan->dum_ch_conf = DUM_CH_CONF(i);
620 p_chan->dum_ch_stat = DUM_CH_STAT(i);
621 p_chan->dum_ch_ctrl = 0; /* WriteOnly control register */
622 }
623
624 return 0;
625}
626
627int pnx4008_get_dum_channel_uf(struct dumchannel_uf *p_chan_uf, int dev_id)
628{
629 int i = p_chan_uf->channelnr;
630
631 if (i < 0 || i > MAX_DUM_CHANNELS)
632 return -EINVAL;
633 else if (dum_data.fb_owning_channel[i] != dev_id)
634 return -EFBNOTOWNER;
635 else {
636 p_chan_uf->dirty = dum_data.chan_uf_store[i].dirty;
637 p_chan_uf->source = dum_data.chan_uf_store[i].source;
638 p_chan_uf->x_offset = dum_data.chan_uf_store[i].x_offset;
639 p_chan_uf->y_offset = dum_data.chan_uf_store[i].y_offset;
640 p_chan_uf->width = dum_data.chan_uf_store[i].width;
641 p_chan_uf->height = dum_data.chan_uf_store[i].height;
642 }
643
644 return 0;
645}
646
647EXPORT_SYMBOL(pnx4008_get_dum_channel_uf);
648
649int pnx4008_get_dum_channel_config(int channr, int dev_id)
650{
651 int ret;
652 struct dumchannel chan;
653
654 if (channr < 0 || channr > MAX_DUM_CHANNELS)
655 return -EINVAL;
656 else if (dum_data.fb_owning_channel[channr] != dev_id)
657 return -EFBNOTOWNER;
658 else {
659 chan.channelnr = channr;
660 if ((ret = get_channel(&chan)) != 0)
661 return ret;
662 }
663
664 return (chan.dum_ch_conf & DUM_CHANNEL_CFG_MASK);
665}
666
667EXPORT_SYMBOL(pnx4008_get_dum_channel_config);
668
669int pnx4008_force_update_dum_channel(int channr, int dev_id)
670{
671 if (channr < 0 || channr > MAX_DUM_CHANNELS)
672 return -EINVAL;
673
674 else if (dum_data.fb_owning_channel[channr] != dev_id)
675 return -EFBNOTOWNER;
676 else
677 DUM_CH_CTRL(channr) = CTRL_SETDIRTY;
678
679 return 0;
680}
681
682EXPORT_SYMBOL(pnx4008_force_update_dum_channel);
683
684#endif
685
686int pnx4008_sdum_mmap(struct fb_info *info, struct vm_area_struct *vma,
687 struct device *dev)
688{
689 unsigned long off = vma->vm_pgoff << PAGE_SHIFT;
690
691 if (off < info->fix.smem_len) {
692 vma->vm_pgoff += 1;
693 return dma_mmap_writecombine(dev, vma,
694 (void *)dum_data.lcd_virt_start,
695 dum_data.lcd_phys_start,
696 FB_DMA_SIZE);
697 }
698 return -EINVAL;
699}
700
701EXPORT_SYMBOL(pnx4008_sdum_mmap);
702
703int pnx4008_set_dum_exit_notification(int dev_id)
704{
705 int i;
706
707 for (i = 0; i < MAX_DUM_CHANNELS; i++)
708 if (dum_data.fb_owning_channel[i] == dev_id)
709 return -ERESOURCESNOTFREED;
710
711 return 0;
712}
713
714EXPORT_SYMBOL(pnx4008_set_dum_exit_notification);
715
716/* Platform device driver for DUM */
717
718static int sdum_suspend(struct platform_device *pdev, pm_message_t state)
719{
720 int retval = 0;
721 struct clk *clk;
722
723 clk = clk_get(0, "dum_ck");
724 if (!IS_ERR(clk)) {
725 clk_set_rate(clk, 0);
726 clk_put(clk);
727 } else
728 retval = PTR_ERR(clk);
729
730 /* disable BAC */
731 DUM_CTRL = V_BAC_DISABLE_IDLE;
732
733 /* LCD standby & turn off display */
734 lcd_reset();
735
736 return retval;
737}
738
739static int sdum_resume(struct platform_device *pdev)
740{
741 int retval = 0;
742 struct clk *clk;
743
744 clk = clk_get(0, "dum_ck");
745 if (!IS_ERR(clk)) {
746 clk_set_rate(clk, 1);
747 clk_put(clk);
748 } else
749 retval = PTR_ERR(clk);
750
751 /* wait for BAC disable */
752 DUM_CTRL = V_BAC_DISABLE_TRIG;
753
754 while (DUM_CTRL & BAC_ENABLED)
755 udelay(10);
756
757 /* re-init LCD */
758 lcd_init();
759
760 /* enable BAC and reset MUX */
761 DUM_CTRL = V_BAC_ENABLE;
762 udelay(1);
763 DUM_CTRL = V_MUX_RESET;
764 return 0;
765}
766
767static int __devinit sdum_probe(struct platform_device *pdev)
768{
769 int ret = 0, i = 0;
770
771 /* map frame buffer */
772 dum_data.lcd_virt_start = (u32) dma_alloc_writecombine(&pdev->dev,
773 FB_DMA_SIZE,
774 &dum_data.lcd_phys_start,
775 GFP_KERNEL);
776
777 if (!dum_data.lcd_virt_start) {
778 ret = -ENOMEM;
779 goto out_3;
780 }
781
782 /* map slave registers */
783 dum_data.slave_phys_base = PNX4008_DUM_SLAVE_BASE;
784 dum_data.slave_virt_base =
785 (u32 *) ioremap_nocache(dum_data.slave_phys_base, sizeof(u32));
786
787 if (dum_data.slave_virt_base == NULL) {
788 ret = -ENOMEM;
789 goto out_2;
790 }
791
792 /* initialize DUM and LCD display */
793 ret = dum_init(pdev);
794 if (ret)
795 goto out_1;
796
797 dum_chan_init();
798 lcd_init();
799
800 DUM_CTRL = V_BAC_ENABLE;
801 udelay(1);
802 DUM_CTRL = V_MUX_RESET;
803
804 /* set decode address and sync clock divider */
805 DUM_DECODE = dum_data.lcd_phys_start & DUM_DECODE_MASK;
806 DUM_CLK_DIV = PNX4008_DUM_CLK_DIV;
807
808 for (i = 0; i < MAX_DUM_CHANNELS; i++)
809 dum_data.fb_owning_channel[i] = -1;
810
811 /*setup wakeup interrupt */
812 start_int_set_rising_edge(SE_DISP_SYNC_INT);
813 start_int_ack(SE_DISP_SYNC_INT);
814 start_int_umask(SE_DISP_SYNC_INT);
815
816 return 0;
817
818out_1:
819 iounmap((void *)dum_data.slave_virt_base);
820out_2:
821 dma_free_writecombine(&pdev->dev, FB_DMA_SIZE,
822 (void *)dum_data.lcd_virt_start,
823 dum_data.lcd_phys_start);
824out_3:
825 return ret;
826}
827
828static int sdum_remove(struct platform_device *pdev)
829{
830 struct clk *clk;
831
832 start_int_mask(SE_DISP_SYNC_INT);
833
834 clk = clk_get(0, "dum_ck");
835 if (!IS_ERR(clk)) {
836 clk_set_rate(clk, 0);
837 clk_put(clk);
838 }
839
840 iounmap((void *)dum_data.slave_virt_base);
841
842 dma_free_writecombine(&pdev->dev, FB_DMA_SIZE,
843 (void *)dum_data.lcd_virt_start,
844 dum_data.lcd_phys_start);
845
846 return 0;
847}
848
849static struct platform_driver sdum_driver = {
850 .driver = {
851 .name = "pnx4008-sdum",
852 },
853 .probe = sdum_probe,
854 .remove = sdum_remove,
855 .suspend = sdum_suspend,
856 .resume = sdum_resume,
857};
858
859int __init sdum_init(void)
860{
861 return platform_driver_register(&sdum_driver);
862}
863
864static void __exit sdum_exit(void)
865{
866 platform_driver_unregister(&sdum_driver);
867};
868
869module_init(sdum_init);
870module_exit(sdum_exit);
871
872MODULE_LICENSE("GPL");