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iwl3945: fix possible il->txq NULL pointer dereference in delayed works
[linux/fpc-iii.git] / drivers / video / tmiofb.c
blob8e4a446b5ed111054ed52f0ff62abbe79edb006d
1 /*
2 * Frame Buffer Device for Toshiba Mobile IO(TMIO) controller
3 *
4 * Copyright(C) 2005-2006 Chris Humbert
5 * Copyright(C) 2005 Dirk Opfer
6 * Copytight(C) 2007,2008 Dmitry Baryshkov
7 *
8 * Based on:
9 * drivers/video/w100fb.c
10 * code written by Sharp/Lineo for 2.4 kernels
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2
14 * as published by the Free Software Foundation;
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 */
21
22 #include <linux/kernel.h>
23 #include <linux/module.h>
24 #include <linux/platform_device.h>
25 #include <linux/fb.h>
26 #include <linux/interrupt.h>
27 #include <linux/delay.h>
28 /* Why should fb driver call console functions? because console_lock() */
29 #include <linux/console.h>
30 #include <linux/mfd/core.h>
31 #include <linux/mfd/tmio.h>
32 #include <linux/uaccess.h>
33
34 /*
35 * accelerator commands
36 */
37 #define TMIOFB_ACC_CSADR(x) (0x00000000 | ((x) & 0x001ffffe))
38 #define TMIOFB_ACC_CHPIX(x) (0x01000000 | ((x) & 0x000003ff))
39 #define TMIOFB_ACC_CVPIX(x) (0x02000000 | ((x) & 0x000003ff))
40 #define TMIOFB_ACC_PSADR(x) (0x03000000 | ((x) & 0x00fffffe))
41 #define TMIOFB_ACC_PHPIX(x) (0x04000000 | ((x) & 0x000003ff))
42 #define TMIOFB_ACC_PVPIX(x) (0x05000000 | ((x) & 0x000003ff))
43 #define TMIOFB_ACC_PHOFS(x) (0x06000000 | ((x) & 0x000003ff))
44 #define TMIOFB_ACC_PVOFS(x) (0x07000000 | ((x) & 0x000003ff))
45 #define TMIOFB_ACC_POADR(x) (0x08000000 | ((x) & 0x00fffffe))
46 #define TMIOFB_ACC_RSTR(x) (0x09000000 | ((x) & 0x000000ff))
47 #define TMIOFB_ACC_TCLOR(x) (0x0A000000 | ((x) & 0x0000ffff))
48 #define TMIOFB_ACC_FILL(x) (0x0B000000 | ((x) & 0x0000ffff))
49 #define TMIOFB_ACC_DSADR(x) (0x0C000000 | ((x) & 0x00fffffe))
50 #define TMIOFB_ACC_SSADR(x) (0x0D000000 | ((x) & 0x00fffffe))
51 #define TMIOFB_ACC_DHPIX(x) (0x0E000000 | ((x) & 0x000003ff))
52 #define TMIOFB_ACC_DVPIX(x) (0x0F000000 | ((x) & 0x000003ff))
53 #define TMIOFB_ACC_SHPIX(x) (0x10000000 | ((x) & 0x000003ff))
54 #define TMIOFB_ACC_SVPIX(x) (0x11000000 | ((x) & 0x000003ff))
55 #define TMIOFB_ACC_LBINI(x) (0x12000000 | ((x) & 0x0000ffff))
56 #define TMIOFB_ACC_LBK2(x) (0x13000000 | ((x) & 0x0000ffff))
57 #define TMIOFB_ACC_SHBINI(x) (0x14000000 | ((x) & 0x0000ffff))
58 #define TMIOFB_ACC_SHBK2(x) (0x15000000 | ((x) & 0x0000ffff))
59 #define TMIOFB_ACC_SVBINI(x) (0x16000000 | ((x) & 0x0000ffff))
60 #define TMIOFB_ACC_SVBK2(x) (0x17000000 | ((x) & 0x0000ffff))
61
62 #define TMIOFB_ACC_CMGO 0x20000000
63 #define TMIOFB_ACC_CMGO_CEND 0x00000001
64 #define TMIOFB_ACC_CMGO_INT 0x00000002
65 #define TMIOFB_ACC_CMGO_CMOD 0x00000010
66 #define TMIOFB_ACC_CMGO_CDVRV 0x00000020
67 #define TMIOFB_ACC_CMGO_CDHRV 0x00000040
68 #define TMIOFB_ACC_CMGO_RUND 0x00008000
69 #define TMIOFB_ACC_SCGO 0x21000000
70 #define TMIOFB_ACC_SCGO_CEND 0x00000001
71 #define TMIOFB_ACC_SCGO_INT 0x00000002
72 #define TMIOFB_ACC_SCGO_ROP3 0x00000004
73 #define TMIOFB_ACC_SCGO_TRNS 0x00000008
74 #define TMIOFB_ACC_SCGO_DVRV 0x00000010
75 #define TMIOFB_ACC_SCGO_DHRV 0x00000020
76 #define TMIOFB_ACC_SCGO_SVRV 0x00000040
77 #define TMIOFB_ACC_SCGO_SHRV 0x00000080
78 #define TMIOFB_ACC_SCGO_DSTXY 0x00008000
79 #define TMIOFB_ACC_SBGO 0x22000000
80 #define TMIOFB_ACC_SBGO_CEND 0x00000001
81 #define TMIOFB_ACC_SBGO_INT 0x00000002
82 #define TMIOFB_ACC_SBGO_DVRV 0x00000010
83 #define TMIOFB_ACC_SBGO_DHRV 0x00000020
84 #define TMIOFB_ACC_SBGO_SVRV 0x00000040
85 #define TMIOFB_ACC_SBGO_SHRV 0x00000080
86 #define TMIOFB_ACC_SBGO_SBMD 0x00000100
87 #define TMIOFB_ACC_FLGO 0x23000000
88 #define TMIOFB_ACC_FLGO_CEND 0x00000001
89 #define TMIOFB_ACC_FLGO_INT 0x00000002
90 #define TMIOFB_ACC_FLGO_ROP3 0x00000004
91 #define TMIOFB_ACC_LDGO 0x24000000
92 #define TMIOFB_ACC_LDGO_CEND 0x00000001
93 #define TMIOFB_ACC_LDGO_INT 0x00000002
94 #define TMIOFB_ACC_LDGO_ROP3 0x00000004
95 #define TMIOFB_ACC_LDGO_ENDPX 0x00000008
96 #define TMIOFB_ACC_LDGO_LVRV 0x00000010
97 #define TMIOFB_ACC_LDGO_LHRV 0x00000020
98 #define TMIOFB_ACC_LDGO_LDMOD 0x00000040
99
100 /* a FIFO is always allocated, even if acceleration is not used */
101 #define TMIOFB_FIFO_SIZE 512
102
103 /*
104 * LCD Host Controller Configuration Register
105 *
106 * This iomem area supports only 16-bit IO.
107 */
108 #define CCR_CMD 0x04 /* Command */
109 #define CCR_REVID 0x08 /* Revision ID */
110 #define CCR_BASEL 0x10 /* LCD Control Reg Base Addr Low */
111 #define CCR_BASEH 0x12 /* LCD Control Reg Base Addr High */
112 #define CCR_UGCC 0x40 /* Unified Gated Clock Control */
113 #define CCR_GCC 0x42 /* Gated Clock Control */
114 #define CCR_USC 0x50 /* Unified Software Clear */
115 #define CCR_VRAMRTC 0x60 /* VRAM Timing Control */
116 /* 0x61 VRAM Refresh Control */
117 #define CCR_VRAMSAC 0x62 /* VRAM Access Control */
118 /* 0x63 VRAM Status */
119 #define CCR_VRAMBC 0x64 /* VRAM Block Control */
120
121 /*
122 * LCD Control Register
123 *
124 * This iomem area supports only 16-bit IO.
125 */
126 #define LCR_UIS 0x000 /* Unified Interrupt Status */
127 #define LCR_VHPN 0x008 /* VRAM Horizontal Pixel Number */
128 #define LCR_CFSAL 0x00a /* Command FIFO Start Address Low */
129 #define LCR_CFSAH 0x00c /* Command FIFO Start Address High */
130 #define LCR_CFS 0x00e /* Command FIFO Size */
131 #define LCR_CFWS 0x010 /* Command FIFO Writeable Size */
132 #define LCR_BBIE 0x012 /* BitBLT Interrupt Enable */
133 #define LCR_BBISC 0x014 /* BitBLT Interrupt Status and Clear */
134 #define LCR_CCS 0x016 /* Command Count Status */
135 #define LCR_BBES 0x018 /* BitBLT Execution Status */
136 #define LCR_CMDL 0x01c /* Command Low */
137 #define LCR_CMDH 0x01e /* Command High */
138 #define LCR_CFC 0x022 /* Command FIFO Clear */
139 #define LCR_CCIFC 0x024 /* CMOS Camera IF Control */
140 #define LCR_HWT 0x026 /* Hardware Test */
141 #define LCR_LCDCCRC 0x100 /* LCDC Clock and Reset Control */
142 #define LCR_LCDCC 0x102 /* LCDC Control */
143 #define LCR_LCDCOPC 0x104 /* LCDC Output Pin Control */
144 #define LCR_LCDIS 0x108 /* LCD Interrupt Status */
145 #define LCR_LCDIM 0x10a /* LCD Interrupt Mask */
146 #define LCR_LCDIE 0x10c /* LCD Interrupt Enable */
147 #define LCR_GDSAL 0x122 /* Graphics Display Start Address Low */
148 #define LCR_GDSAH 0x124 /* Graphics Display Start Address High */
149 #define LCR_VHPCL 0x12a /* VRAM Horizontal Pixel Count Low */
150 #define LCR_VHPCH 0x12c /* VRAM Horizontal Pixel Count High */
151 #define LCR_GM 0x12e /* Graphic Mode(VRAM access enable) */
152 #define LCR_HT 0x140 /* Horizontal Total */
153 #define LCR_HDS 0x142 /* Horizontal Display Start */
154 #define LCR_HSS 0x144 /* H-Sync Start */
155 #define LCR_HSE 0x146 /* H-Sync End */
156 #define LCR_HNP 0x14c /* Horizontal Number of Pixels */
157 #define LCR_VT 0x150 /* Vertical Total */
158 #define LCR_VDS 0x152 /* Vertical Display Start */
159 #define LCR_VSS 0x154 /* V-Sync Start */
160 #define LCR_VSE 0x156 /* V-Sync End */
161 #define LCR_CDLN 0x160 /* Current Display Line Number */
162 #define LCR_ILN 0x162 /* Interrupt Line Number */
163 #define LCR_SP 0x164 /* Sync Polarity */
164 #define LCR_MISC 0x166 /* MISC(RGB565 mode) */
165 #define LCR_VIHSS 0x16a /* Video Interface H-Sync Start */
166 #define LCR_VIVS 0x16c /* Video Interface Vertical Start */
167 #define LCR_VIVE 0x16e /* Video Interface Vertical End */
168 #define LCR_VIVSS 0x170 /* Video Interface V-Sync Start */
169 #define LCR_VCCIS 0x17e /* Video / CMOS Camera Interface Select */
170 #define LCR_VIDWSAL 0x180 /* VI Data Write Start Address Low */
171 #define LCR_VIDWSAH 0x182 /* VI Data Write Start Address High */
172 #define LCR_VIDRSAL 0x184 /* VI Data Read Start Address Low */
173 #define LCR_VIDRSAH 0x186 /* VI Data Read Start Address High */
174 #define LCR_VIPDDST 0x188 /* VI Picture Data Display Start Timing */
175 #define LCR_VIPDDET 0x186 /* VI Picture Data Display End Timing */
176 #define LCR_VIE 0x18c /* Video Interface Enable */
177 #define LCR_VCS 0x18e /* Video/Camera Select */
178 #define LCR_VPHWC 0x194 /* Video Picture Horizontal Wait Count */
179 #define LCR_VPHS 0x196 /* Video Picture Horizontal Size */
180 #define LCR_VPVWC 0x198 /* Video Picture Vertical Wait Count */
181 #define LCR_VPVS 0x19a /* Video Picture Vertical Size */
182 #define LCR_PLHPIX 0x1a0 /* PLHPIX */
183 #define LCR_XS 0x1a2 /* XStart */
184 #define LCR_XCKHW 0x1a4 /* XCK High Width */
185 #define LCR_STHS 0x1a8 /* STH Start */
186 #define LCR_VT2 0x1aa /* Vertical Total */
187 #define LCR_YCKSW 0x1ac /* YCK Start Wait */
188 #define LCR_YSTS 0x1ae /* YST Start */
189 #define LCR_PPOLS 0x1b0 /* #PPOL Start */
190 #define LCR_PRECW 0x1b2 /* PREC Width */
191 #define LCR_VCLKHW 0x1b4 /* VCLK High Width */
192 #define LCR_OC 0x1b6 /* Output Control */
193
194 static char *mode_option __devinitdata;
195
196 struct tmiofb_par {
197 u32 pseudo_palette[16];
198
199 #ifdef CONFIG_FB_TMIO_ACCELL
200 wait_queue_head_t wait_acc;
201 bool use_polling;
202 #endif
203
204 void __iomem *ccr;
205 void __iomem *lcr;
206 };
207
208 /*--------------------------------------------------------------------------*/
209
210 /*
211 * reasons for an interrupt:
212 * uis bbisc lcdis
213 * 0100 0001 accelerator command completed
214 * 2000 0001 vsync start
215 * 2000 0002 display start
216 * 2000 0004 line number match(0x1ff mask???)
217 */
218 static irqreturn_t tmiofb_irq(int irq, void *__info)
219 {
220 struct fb_info *info = __info;
221 struct tmiofb_par *par = info->par;
222 unsigned int bbisc = tmio_ioread16(par->lcr + LCR_BBISC);
223
224
225 tmio_iowrite16(bbisc, par->lcr + LCR_BBISC);
226
227 #ifdef CONFIG_FB_TMIO_ACCELL
228 /*
229 * We were in polling mode and now we got correct irq.
230 * Switch back to IRQ-based sync of command FIFO
231 */
232 if (unlikely(par->use_polling && irq != -1)) {
233 printk(KERN_INFO "tmiofb: switching to waitq\n");
234 par->use_polling = false;
235 }
236
237 if (bbisc & 1)
238 wake_up(&par->wait_acc);
239 #endif
240
241 return IRQ_HANDLED;
242 }
243
244
245 /*--------------------------------------------------------------------------*/
246
247
248 /*
249 * Turns off the LCD controller and LCD host controller.
250 */
251 static int tmiofb_hw_stop(struct platform_device *dev)
252 {
253 struct tmio_fb_data *data = dev->dev.platform_data;
254 struct fb_info *info = platform_get_drvdata(dev);
255 struct tmiofb_par *par = info->par;
256
257 tmio_iowrite16(0, par->ccr + CCR_UGCC);
258 tmio_iowrite16(0, par->lcr + LCR_GM);
259 data->lcd_set_power(dev, 0);
260 tmio_iowrite16(0x0010, par->lcr + LCR_LCDCCRC);
261
262 return 0;
263 }
264
265 /*
266 * Initializes the LCD host controller.
267 */
268 static int tmiofb_hw_init(struct platform_device *dev)
269 {
270 const struct mfd_cell *cell = mfd_get_cell(dev);
271 struct fb_info *info = platform_get_drvdata(dev);
272 struct tmiofb_par *par = info->par;
273 const struct resource *nlcr = &cell->resources[0];
274 const struct resource *vram = &cell->resources[2];
275 unsigned long base;
276
277 if (nlcr == NULL || vram == NULL)
278 return -EINVAL;
279
280 base = nlcr->start;
281
282 tmio_iowrite16(0x003a, par->ccr + CCR_UGCC);
283 tmio_iowrite16(0x003a, par->ccr + CCR_GCC);
284 tmio_iowrite16(0x3f00, par->ccr + CCR_USC);
285
286 msleep(2); /* wait for device to settle */
287
288 tmio_iowrite16(0x0000, par->ccr + CCR_USC);
289 tmio_iowrite16(base >> 16, par->ccr + CCR_BASEH);
290 tmio_iowrite16(base, par->ccr + CCR_BASEL);
291 tmio_iowrite16(0x0002, par->ccr + CCR_CMD); /* base address enable */
292 tmio_iowrite16(0x40a8, par->ccr + CCR_VRAMRTC); /* VRAMRC, VRAMTC */
293 tmio_iowrite16(0x0018, par->ccr + CCR_VRAMSAC); /* VRAMSTS, VRAMAC */
294 tmio_iowrite16(0x0002, par->ccr + CCR_VRAMBC);
295 msleep(2); /* wait for device to settle */
296 tmio_iowrite16(0x000b, par->ccr + CCR_VRAMBC);
297
298 base = vram->start + info->screen_size;
299 tmio_iowrite16(base >> 16, par->lcr + LCR_CFSAH);
300 tmio_iowrite16(base, par->lcr + LCR_CFSAL);
301 tmio_iowrite16(TMIOFB_FIFO_SIZE - 1, par->lcr + LCR_CFS);
302 tmio_iowrite16(1, par->lcr + LCR_CFC);
303 tmio_iowrite16(1, par->lcr + LCR_BBIE);
304 tmio_iowrite16(0, par->lcr + LCR_CFWS);
305
306 return 0;
307 }
308
309 /*
310 * Sets the LCD controller's output resolution and pixel clock
311 */
312 static void tmiofb_hw_mode(struct platform_device *dev)
313 {
314 struct tmio_fb_data *data = dev->dev.platform_data;
315 struct fb_info *info = platform_get_drvdata(dev);
316 struct fb_videomode *mode = info->mode;
317 struct tmiofb_par *par = info->par;
318 unsigned int i;
319
320 tmio_iowrite16(0, par->lcr + LCR_GM);
321 data->lcd_set_power(dev, 0);
322 tmio_iowrite16(0x0010, par->lcr + LCR_LCDCCRC);
323 data->lcd_mode(dev, mode);
324 data->lcd_set_power(dev, 1);
325
326 tmio_iowrite16(info->fix.line_length, par->lcr + LCR_VHPN);
327 tmio_iowrite16(0, par->lcr + LCR_GDSAH);
328 tmio_iowrite16(0, par->lcr + LCR_GDSAL);
329 tmio_iowrite16(info->fix.line_length >> 16, par->lcr + LCR_VHPCH);
330 tmio_iowrite16(info->fix.line_length, par->lcr + LCR_VHPCL);
331 tmio_iowrite16(i = 0, par->lcr + LCR_HSS);
332 tmio_iowrite16(i += mode->hsync_len, par->lcr + LCR_HSE);
333 tmio_iowrite16(i += mode->left_margin, par->lcr + LCR_HDS);
334 tmio_iowrite16(i += mode->xres + mode->right_margin, par->lcr + LCR_HT);
335 tmio_iowrite16(mode->xres, par->lcr + LCR_HNP);
336 tmio_iowrite16(i = 0, par->lcr + LCR_VSS);
337 tmio_iowrite16(i += mode->vsync_len, par->lcr + LCR_VSE);
338 tmio_iowrite16(i += mode->upper_margin, par->lcr + LCR_VDS);
339 tmio_iowrite16(i += mode->yres, par->lcr + LCR_ILN);
340 tmio_iowrite16(i += mode->lower_margin, par->lcr + LCR_VT);
341 tmio_iowrite16(3, par->lcr + LCR_MISC); /* RGB565 mode */
342 tmio_iowrite16(1, par->lcr + LCR_GM); /* VRAM enable */
343 tmio_iowrite16(0x4007, par->lcr + LCR_LCDCC);
344 tmio_iowrite16(3, par->lcr + LCR_SP); /* sync polarity */
345
346 tmio_iowrite16(0x0010, par->lcr + LCR_LCDCCRC);
347 msleep(5); /* wait for device to settle */
348 tmio_iowrite16(0x0014, par->lcr + LCR_LCDCCRC); /* STOP_CKP */
349 msleep(5); /* wait for device to settle */
350 tmio_iowrite16(0x0015, par->lcr + LCR_LCDCCRC); /* STOP_CKP|SOFT_RESET*/
351 tmio_iowrite16(0xfffa, par->lcr + LCR_VCS);
352 }
353
354 /*--------------------------------------------------------------------------*/
355
356 #ifdef CONFIG_FB_TMIO_ACCELL
357 static int __must_check
358 tmiofb_acc_wait(struct fb_info *info, unsigned int ccs)
359 {
360 struct tmiofb_par *par = info->par;
361 /*
362 * This code can be called with interrupts disabled.
363 * So instead of relaying on irq to trigger the event,
364 * poll the state till the necessary command is executed.
365 */
366 if (irqs_disabled() || par->use_polling) {
367 int i = 0;
368 while (tmio_ioread16(par->lcr + LCR_CCS) > ccs) {
369 udelay(1);
370 i++;
371 if (i > 10000) {
372 pr_err("tmiofb: timeout waiting for %d\n",
373 ccs);
374 return -ETIMEDOUT;
375 }
376 tmiofb_irq(-1, info);
377 }
378 } else {
379 if (!wait_event_interruptible_timeout(par->wait_acc,
380 tmio_ioread16(par->lcr + LCR_CCS) <= ccs,
381 1000)) {
382 pr_err("tmiofb: timeout waiting for %d\n", ccs);
383 return -ETIMEDOUT;
384 }
385 }
386
387 return 0;
388 }
389
390 /*
391 * Writes an accelerator command to the accelerator's FIFO.
392 */
393 static int
394 tmiofb_acc_write(struct fb_info *info, const u32 *cmd, unsigned int count)
395 {
396 struct tmiofb_par *par = info->par;
397 int ret;
398
399 ret = tmiofb_acc_wait(info, TMIOFB_FIFO_SIZE - count);
400 if (ret)
401 return ret;
402
403 for (; count; count--, cmd++) {
404 tmio_iowrite16(*cmd >> 16, par->lcr + LCR_CMDH);
405 tmio_iowrite16(*cmd, par->lcr + LCR_CMDL);
406 }
407
408 return ret;
409 }
410
411 /*
412 * Wait for the accelerator to finish its operations before writing
413 * to the framebuffer for consistent display output.
414 */
415 static int tmiofb_sync(struct fb_info *fbi)
416 {
417 struct tmiofb_par *par = fbi->par;
418
419 int ret;
420 int i = 0;
421
422 ret = tmiofb_acc_wait(fbi, 0);
423
424 while (tmio_ioread16(par->lcr + LCR_BBES) & 2) { /* blit active */
425 udelay(1);
426 i++ ;
427 if (i > 10000) {
428 printk(KERN_ERR "timeout waiting for blit to end!\n");
429 return -ETIMEDOUT;
430 }
431 }
432
433 return ret;
434 }
435
436 static void
437 tmiofb_fillrect(struct fb_info *fbi, const struct fb_fillrect *rect)
438 {
439 const u32 cmd[] = {
440 TMIOFB_ACC_DSADR((rect->dy * fbi->mode->xres + rect->dx) * 2),
441 TMIOFB_ACC_DHPIX(rect->width - 1),
442 TMIOFB_ACC_DVPIX(rect->height - 1),
443 TMIOFB_ACC_FILL(rect->color),
444 TMIOFB_ACC_FLGO,
445 };
446
447 if (fbi->state != FBINFO_STATE_RUNNING ||
448 fbi->flags & FBINFO_HWACCEL_DISABLED) {
449 cfb_fillrect(fbi, rect);
450 return;
451 }
452
453 tmiofb_acc_write(fbi, cmd, ARRAY_SIZE(cmd));
454 }
455
456 static void
457 tmiofb_copyarea(struct fb_info *fbi, const struct fb_copyarea *area)
458 {
459 const u32 cmd[] = {
460 TMIOFB_ACC_DSADR((area->dy * fbi->mode->xres + area->dx) * 2),
461 TMIOFB_ACC_DHPIX(area->width - 1),
462 TMIOFB_ACC_DVPIX(area->height - 1),
463 TMIOFB_ACC_SSADR((area->sy * fbi->mode->xres + area->sx) * 2),
464 TMIOFB_ACC_SCGO,
465 };
466
467 if (fbi->state != FBINFO_STATE_RUNNING ||
468 fbi->flags & FBINFO_HWACCEL_DISABLED) {
469 cfb_copyarea(fbi, area);
470 return;
471 }
472
473 tmiofb_acc_write(fbi, cmd, ARRAY_SIZE(cmd));
474 }
475 #endif
476
477 static void tmiofb_clearscreen(struct fb_info *info)
478 {
479 const struct fb_fillrect rect = {
480 .dx = 0,
481 .dy = 0,
482 .width = info->mode->xres,
483 .height = info->mode->yres,
484 .color = 0,
485 .rop = ROP_COPY,
486 };
487
488 info->fbops->fb_fillrect(info, &rect);
489 }
490
491 static int tmiofb_vblank(struct fb_info *fbi, struct fb_vblank *vblank)
492 {
493 struct tmiofb_par *par = fbi->par;
494 struct fb_videomode *mode = fbi->mode;
495 unsigned int vcount = tmio_ioread16(par->lcr + LCR_CDLN);
496 unsigned int vds = mode->vsync_len + mode->upper_margin;
497
498 vblank->vcount = vcount;
499 vblank->flags = FB_VBLANK_HAVE_VBLANK | FB_VBLANK_HAVE_VCOUNT
500 | FB_VBLANK_HAVE_VSYNC;
501
502 if (vcount < mode->vsync_len)
503 vblank->flags |= FB_VBLANK_VSYNCING;
504
505 if (vcount < vds || vcount > vds + mode->yres)
506 vblank->flags |= FB_VBLANK_VBLANKING;
507
508 return 0;
509 }
510
511
512 static int tmiofb_ioctl(struct fb_info *fbi,
513 unsigned int cmd, unsigned long arg)
514 {
515 switch (cmd) {
516 case FBIOGET_VBLANK: {
517 struct fb_vblank vblank = {0};
518 void __user *argp = (void __user *) arg;
519
520 tmiofb_vblank(fbi, &vblank);
521 if (copy_to_user(argp, &vblank, sizeof vblank))
522 return -EFAULT;
523 return 0;
524 }
525
526 #ifdef CONFIG_FB_TMIO_ACCELL
527 case FBIO_TMIO_ACC_SYNC:
528 tmiofb_sync(fbi);
529 return 0;
530
531 case FBIO_TMIO_ACC_WRITE: {
532 u32 __user *argp = (void __user *) arg;
533 u32 len;
534 u32 acc[16];
535
536 if (get_user(len, argp))
537 return -EFAULT;
538 if (len > ARRAY_SIZE(acc))
539 return -EINVAL;
540 if (copy_from_user(acc, argp + 1, sizeof(u32) * len))
541 return -EFAULT;
542
543 return tmiofb_acc_write(fbi, acc, len);
544 }
545 #endif
546 }
547
548 return -ENOTTY;
549 }
550
551 /*--------------------------------------------------------------------------*/
552
553 /* Select the smallest mode that allows the desired resolution to be
554 * displayed. If desired, the x and y parameters can be rounded up to
555 * match the selected mode.
556 */
557 static struct fb_videomode *
558 tmiofb_find_mode(struct fb_info *info, struct fb_var_screeninfo *var)
559 {
560 struct tmio_fb_data *data = info->device->platform_data;
561 struct fb_videomode *best = NULL;
562 int i;
563
564 for (i = 0; i < data->num_modes; i++) {
565 struct fb_videomode *mode = data->modes + i;
566
567 if (mode->xres >= var->xres && mode->yres >= var->yres
568 && (!best || (mode->xres < best->xres
569 && mode->yres < best->yres)))
570 best = mode;
571 }
572
573 return best;
574 }
575
576 static int tmiofb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
577 {
578
579 struct fb_videomode *mode;
580 struct tmio_fb_data *data = info->device->platform_data;
581
582 mode = tmiofb_find_mode(info, var);
583 if (!mode || var->bits_per_pixel > 16)
584 return -EINVAL;
585
586 fb_videomode_to_var(var, mode);
587
588 var->xres_virtual = mode->xres;
589 var->yres_virtual = info->screen_size / (mode->xres * 2);
590
591 if (var->yres_virtual < var->yres)
592 return -EINVAL;
593
594 var->xoffset = 0;
595 var->yoffset = 0;
596 var->bits_per_pixel = 16;
597 var->grayscale = 0;
598 var->red.offset = 11;
599 var->red.length = 5;
600 var->green.offset = 5;
601 var->green.length = 6;
602 var->blue.offset = 0;
603 var->blue.length = 5;
604 var->transp.offset = 0;
605 var->transp.length = 0;
606 var->nonstd = 0;
607 var->height = data->height; /* mm */
608 var->width = data->width; /* mm */
609 var->rotate = 0;
610 return 0;
611 }
612
613 static int tmiofb_set_par(struct fb_info *info)
614 {
615 struct fb_var_screeninfo *var = &info->var;
616 struct fb_videomode *mode;
617
618 mode = tmiofb_find_mode(info, var);
619 if (!mode)
620 return -EINVAL;
621
622 info->mode = mode;
623 info->fix.line_length = info->mode->xres *
624 var->bits_per_pixel / 8;
625
626 tmiofb_hw_mode(to_platform_device(info->device));
627 tmiofb_clearscreen(info);
628 return 0;
629 }
630
631 static int tmiofb_setcolreg(unsigned regno, unsigned red, unsigned green,
632 unsigned blue, unsigned transp,
633 struct fb_info *info)
634 {
635 struct tmiofb_par *par = info->par;
636
637 if (regno < ARRAY_SIZE(par->pseudo_palette)) {
638 par->pseudo_palette[regno] =
639 ((red & 0xf800)) |
640 ((green & 0xfc00) >> 5) |
641 ((blue & 0xf800) >> 11);
642 return 0;
643 }
644
645 return -EINVAL;
646 }
647
648 static int tmiofb_blank(int blank, struct fb_info *info)
649 {
650 /*
651 * everything is done in lcd/bl drivers.
652 * this is purely to make sysfs happy and work.
653 */
654 return 0;
655 }
656
657 static struct fb_ops tmiofb_ops = {
658 .owner = THIS_MODULE,
659
660 .fb_ioctl = tmiofb_ioctl,
661 .fb_check_var = tmiofb_check_var,
662 .fb_set_par = tmiofb_set_par,
663 .fb_setcolreg = tmiofb_setcolreg,
664 .fb_blank = tmiofb_blank,
665 .fb_imageblit = cfb_imageblit,
666 #ifdef CONFIG_FB_TMIO_ACCELL
667 .fb_sync = tmiofb_sync,
668 .fb_fillrect = tmiofb_fillrect,
669 .fb_copyarea = tmiofb_copyarea,
670 #else
671 .fb_fillrect = cfb_fillrect,
672 .fb_copyarea = cfb_copyarea,
673 #endif
674 };
675
676 /*--------------------------------------------------------------------------*/
677
678 static int __devinit tmiofb_probe(struct platform_device *dev)
679 {
680 const struct mfd_cell *cell = mfd_get_cell(dev);
681 struct tmio_fb_data *data = dev->dev.platform_data;
682 struct resource *ccr = platform_get_resource(dev, IORESOURCE_MEM, 1);
683 struct resource *lcr = platform_get_resource(dev, IORESOURCE_MEM, 0);
684 struct resource *vram = platform_get_resource(dev, IORESOURCE_MEM, 2);
685 int irq = platform_get_irq(dev, 0);
686 struct fb_info *info;
687 struct tmiofb_par *par;
688 int retval;
689
690 /*
691 * This is the only way ATM to disable the fb
692 */
693 if (data == NULL) {
694 dev_err(&dev->dev, "NULL platform data!\n");
695 return -EINVAL;
696 }
697
698 info = framebuffer_alloc(sizeof(struct tmiofb_par), &dev->dev);
699
700 if (!info)
701 return -ENOMEM;
702
703 par = info->par;
704
705 #ifdef CONFIG_FB_TMIO_ACCELL
706 init_waitqueue_head(&par->wait_acc);
707
708 par->use_polling = true;
709
710 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA
711 | FBINFO_HWACCEL_FILLRECT;
712 #else
713 info->flags = FBINFO_DEFAULT;
714 #endif
715
716 info->fbops = &tmiofb_ops;
717
718 strcpy(info->fix.id, "tmio-fb");
719 info->fix.smem_start = vram->start;
720 info->fix.smem_len = resource_size(vram);
721 info->fix.type = FB_TYPE_PACKED_PIXELS;
722 info->fix.visual = FB_VISUAL_TRUECOLOR;
723 info->fix.mmio_start = lcr->start;
724 info->fix.mmio_len = resource_size(lcr);
725 info->fix.accel = FB_ACCEL_NONE;
726 info->screen_size = info->fix.smem_len - (4 * TMIOFB_FIFO_SIZE);
727 info->pseudo_palette = par->pseudo_palette;
728
729 par->ccr = ioremap(ccr->start, resource_size(ccr));
730 if (!par->ccr) {
731 retval = -ENOMEM;
732 goto err_ioremap_ccr;
733 }
734
735 par->lcr = ioremap(info->fix.mmio_start, info->fix.mmio_len);
736 if (!par->lcr) {
737 retval = -ENOMEM;
738 goto err_ioremap_lcr;
739 }
740
741 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
742 if (!info->screen_base) {
743 retval = -ENOMEM;
744 goto err_ioremap_vram;
745 }
746
747 retval = request_irq(irq, &tmiofb_irq, 0,
748 dev_name(&dev->dev), info);
749
750 if (retval)
751 goto err_request_irq;
752
753 platform_set_drvdata(dev, info);
754
755 retval = fb_find_mode(&info->var, info, mode_option,
756 data->modes, data->num_modes,
757 data->modes, 16);
758 if (!retval) {
759 retval = -EINVAL;
760 goto err_find_mode;
761 }
762
763 if (cell->enable) {
764 retval = cell->enable(dev);
765 if (retval)
766 goto err_enable;
767 }
768
769 retval = tmiofb_hw_init(dev);
770 if (retval)
771 goto err_hw_init;
772
773 fb_videomode_to_modelist(data->modes, data->num_modes,
774 &info->modelist);
775
776 retval = register_framebuffer(info);
777 if (retval < 0)
778 goto err_register_framebuffer;
779
780 printk(KERN_INFO "fb%d: %s frame buffer device\n",
781 info->node, info->fix.id);
782
783 return 0;
784
785 err_register_framebuffer:
786 /*err_set_par:*/
787 tmiofb_hw_stop(dev);
788 err_hw_init:
789 if (cell->disable)
790 cell->disable(dev);
791 err_enable:
792 err_find_mode:
793 platform_set_drvdata(dev, NULL);
794 free_irq(irq, info);
795 err_request_irq:
796 iounmap(info->screen_base);
797 err_ioremap_vram:
798 iounmap(par->lcr);
799 err_ioremap_lcr:
800 iounmap(par->ccr);
801 err_ioremap_ccr:
802 framebuffer_release(info);
803 return retval;
804 }
805
806 static int __devexit tmiofb_remove(struct platform_device *dev)
807 {
808 const struct mfd_cell *cell = mfd_get_cell(dev);
809 struct fb_info *info = platform_get_drvdata(dev);
810 int irq = platform_get_irq(dev, 0);
811 struct tmiofb_par *par;
812
813 if (info) {
814 par = info->par;
815 unregister_framebuffer(info);
816
817 tmiofb_hw_stop(dev);
818
819 if (cell->disable)
820 cell->disable(dev);
821
822 platform_set_drvdata(dev, NULL);
823
824 free_irq(irq, info);
825
826 iounmap(info->screen_base);
827 iounmap(par->lcr);
828 iounmap(par->ccr);
829
830 framebuffer_release(info);
831 }
832
833 return 0;
834 }
835
836 #ifdef DEBUG
837 static void tmiofb_dump_regs(struct platform_device *dev)
838 {
839 struct fb_info *info = platform_get_drvdata(dev);
840 struct tmiofb_par *par = info->par;
841
842 printk(KERN_DEBUG "lhccr:\n");
843 #define CCR_PR(n) printk(KERN_DEBUG "\t" #n " = \t%04x\n",\
844 tmio_ioread16(par->ccr + CCR_ ## n));
845 CCR_PR(CMD);
846 CCR_PR(REVID);
847 CCR_PR(BASEL);
848 CCR_PR(BASEH);
849 CCR_PR(UGCC);
850 CCR_PR(GCC);
851 CCR_PR(USC);
852 CCR_PR(VRAMRTC);
853 CCR_PR(VRAMSAC);
854 CCR_PR(VRAMBC);
855 #undef CCR_PR
856
857 printk(KERN_DEBUG "lcr: \n");
858 #define LCR_PR(n) printk(KERN_DEBUG "\t" #n " = \t%04x\n",\
859 tmio_ioread16(par->lcr + LCR_ ## n));
860 LCR_PR(UIS);
861 LCR_PR(VHPN);
862 LCR_PR(CFSAL);
863 LCR_PR(CFSAH);
864 LCR_PR(CFS);
865 LCR_PR(CFWS);
866 LCR_PR(BBIE);
867 LCR_PR(BBISC);
868 LCR_PR(CCS);
869 LCR_PR(BBES);
870 LCR_PR(CMDL);
871 LCR_PR(CMDH);
872 LCR_PR(CFC);
873 LCR_PR(CCIFC);
874 LCR_PR(HWT);
875 LCR_PR(LCDCCRC);
876 LCR_PR(LCDCC);
877 LCR_PR(LCDCOPC);
878 LCR_PR(LCDIS);
879 LCR_PR(LCDIM);
880 LCR_PR(LCDIE);
881 LCR_PR(GDSAL);
882 LCR_PR(GDSAH);
883 LCR_PR(VHPCL);
884 LCR_PR(VHPCH);
885 LCR_PR(GM);
886 LCR_PR(HT);
887 LCR_PR(HDS);
888 LCR_PR(HSS);
889 LCR_PR(HSE);
890 LCR_PR(HNP);
891 LCR_PR(VT);
892 LCR_PR(VDS);
893 LCR_PR(VSS);
894 LCR_PR(VSE);
895 LCR_PR(CDLN);
896 LCR_PR(ILN);
897 LCR_PR(SP);
898 LCR_PR(MISC);
899 LCR_PR(VIHSS);
900 LCR_PR(VIVS);
901 LCR_PR(VIVE);
902 LCR_PR(VIVSS);
903 LCR_PR(VCCIS);
904 LCR_PR(VIDWSAL);
905 LCR_PR(VIDWSAH);
906 LCR_PR(VIDRSAL);
907 LCR_PR(VIDRSAH);
908 LCR_PR(VIPDDST);
909 LCR_PR(VIPDDET);
910 LCR_PR(VIE);
911 LCR_PR(VCS);
912 LCR_PR(VPHWC);
913 LCR_PR(VPHS);
914 LCR_PR(VPVWC);
915 LCR_PR(VPVS);
916 LCR_PR(PLHPIX);
917 LCR_PR(XS);
918 LCR_PR(XCKHW);
919 LCR_PR(STHS);
920 LCR_PR(VT2);
921 LCR_PR(YCKSW);
922 LCR_PR(YSTS);
923 LCR_PR(PPOLS);
924 LCR_PR(PRECW);
925 LCR_PR(VCLKHW);
926 LCR_PR(OC);
927 #undef LCR_PR
928 }
929 #endif
930
931 #ifdef CONFIG_PM
932 static int tmiofb_suspend(struct platform_device *dev, pm_message_t state)
933 {
934 struct fb_info *info = platform_get_drvdata(dev);
935 #ifdef CONFIG_FB_TMIO_ACCELL
936 struct tmiofb_par *par = info->par;
937 #endif
938 const struct mfd_cell *cell = mfd_get_cell(dev);
939 int retval = 0;
940
941 console_lock();
942
943 fb_set_suspend(info, 1);
944
945 if (info->fbops->fb_sync)
946 info->fbops->fb_sync(info);
947
948
949 #ifdef CONFIG_FB_TMIO_ACCELL
950 /*
951 * The fb should be usable even if interrupts are disabled (and they are
952 * during suspend/resume). Switch temporary to forced polling.
953 */
954 printk(KERN_INFO "tmiofb: switching to polling\n");
955 par->use_polling = true;
956 #endif
957 tmiofb_hw_stop(dev);
958
959 if (cell->suspend)
960 retval = cell->suspend(dev);
961
962 console_unlock();
963
964 return retval;
965 }
966
967 static int tmiofb_resume(struct platform_device *dev)
968 {
969 struct fb_info *info = platform_get_drvdata(dev);
970 const struct mfd_cell *cell = mfd_get_cell(dev);
971 int retval = 0;
972
973 console_lock();
974
975 if (cell->resume) {
976 retval = cell->resume(dev);
977 if (retval)
978 goto out;
979 }
980
981 tmiofb_irq(-1, info);
982
983 tmiofb_hw_init(dev);
984
985 tmiofb_hw_mode(dev);
986
987 fb_set_suspend(info, 0);
988 out:
989 console_unlock();
990 return retval;
991 }
992 #else
993 #define tmiofb_suspend NULL
994 #define tmiofb_resume NULL
995 #endif
996
997 static struct platform_driver tmiofb_driver = {
998 .driver.name = "tmio-fb",
999 .driver.owner = THIS_MODULE,
1000 .probe = tmiofb_probe,
1001 .remove = __devexit_p(tmiofb_remove),
1002 .suspend = tmiofb_suspend,
1003 .resume = tmiofb_resume,
1004 };
1005
1006 /*--------------------------------------------------------------------------*/
1007
1008 #ifndef MODULE
1009 static void __init tmiofb_setup(char *options)
1010 {
1011 char *this_opt;
1012
1013 if (!options || !*options)
1014 return;
1015
1016 while ((this_opt = strsep(&options, ",")) != NULL) {
1017 if (!*this_opt)
1018 continue;
1019 /*
1020 * FIXME
1021 */
1022 }
1023 }
1024 #endif
1025
1026 static int __init tmiofb_init(void)
1027 {
1028 #ifndef MODULE
1029 char *option = NULL;
1030
1031 if (fb_get_options("tmiofb", &option))
1032 return -ENODEV;
1033 tmiofb_setup(option);
1034 #endif
1035 return platform_driver_register(&tmiofb_driver);
1036 }
1037
1038 static void __exit tmiofb_cleanup(void)
1039 {
1040 platform_driver_unregister(&tmiofb_driver);
1041 }
1042
1043 module_init(tmiofb_init);
1044 module_exit(tmiofb_cleanup);
1045
1046 MODULE_DESCRIPTION("TMIO framebuffer driver");
1047 MODULE_AUTHOR("Chris Humbert, Dirk Opfer, Dmitry Baryshkov");
1048 MODULE_LICENSE("GPL");
Linux with added FPC-III support