Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[linux-2.6] / arch / arm / mach-pxa / corgi_lcd.c
1 /*
2  * linux/arch/arm/mach-pxa/corgi_lcd.c
3  *
4  * Corgi/Spitz LCD Specific Code
5  *
6  * Copyright (C) 2005 Richard Purdie
7  *
8  * Connectivity:
9  *   Corgi - LCD to ATI Imageon w100 (Wallaby)
10  *   Spitz - LCD to PXA Framebuffer
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 as
14  * published by the Free Software Foundation.
15  *
16  */
17
18 #include <linux/delay.h>
19 #include <linux/kernel.h>
20 #include <linux/platform_device.h>
21 #include <linux/module.h>
22 #include <linux/string.h>
23 #include <asm/arch/akita.h>
24 #include <asm/arch/corgi.h>
25 #include <asm/hardware.h>
26 #include <asm/arch/pxa-regs.h>
27 #include <asm/arch/sharpsl.h>
28 #include <asm/arch/spitz.h>
29 #include <asm/hardware/scoop.h>
30 #include <asm/mach/sharpsl_param.h>
31 #include "generic.h"
32
33 /* Register Addresses */
34 #define RESCTL_ADRS     0x00
35 #define PHACTRL_ADRS    0x01
36 #define DUTYCTRL_ADRS   0x02
37 #define POWERREG0_ADRS  0x03
38 #define POWERREG1_ADRS  0x04
39 #define GPOR3_ADRS      0x05
40 #define PICTRL_ADRS     0x06
41 #define POLCTRL_ADRS    0x07
42
43 /* Resgister Bit Definitions */
44 #define RESCTL_QVGA     0x01
45 #define RESCTL_VGA      0x00
46
47 #define POWER1_VW_ON    0x01  /* VW Supply FET ON */
48 #define POWER1_GVSS_ON  0x02  /* GVSS(-8V) Power Supply ON */
49 #define POWER1_VDD_ON   0x04  /* VDD(8V),SVSS(-4V) Power Supply ON */
50
51 #define POWER1_VW_OFF   0x00  /* VW Supply FET OFF */
52 #define POWER1_GVSS_OFF 0x00  /* GVSS(-8V) Power Supply OFF */
53 #define POWER1_VDD_OFF  0x00  /* VDD(8V),SVSS(-4V) Power Supply OFF */
54
55 #define POWER0_COM_DCLK 0x01  /* COM Voltage DC Bias DAC Serial Data Clock */
56 #define POWER0_COM_DOUT 0x02  /* COM Voltage DC Bias DAC Serial Data Out */
57 #define POWER0_DAC_ON   0x04  /* DAC Power Supply ON */
58 #define POWER0_COM_ON   0x08  /* COM Powewr Supply ON */
59 #define POWER0_VCC5_ON  0x10  /* VCC5 Power Supply ON */
60
61 #define POWER0_DAC_OFF  0x00  /* DAC Power Supply OFF */
62 #define POWER0_COM_OFF  0x00  /* COM Powewr Supply OFF */
63 #define POWER0_VCC5_OFF 0x00  /* VCC5 Power Supply OFF */
64
65 #define PICTRL_INIT_STATE      0x01
66 #define PICTRL_INIOFF          0x02
67 #define PICTRL_POWER_DOWN      0x04
68 #define PICTRL_COM_SIGNAL_OFF  0x08
69 #define PICTRL_DAC_SIGNAL_OFF  0x10
70
71 #define POLCTRL_SYNC_POL_FALL  0x01
72 #define POLCTRL_EN_POL_FALL    0x02
73 #define POLCTRL_DATA_POL_FALL  0x04
74 #define POLCTRL_SYNC_ACT_H     0x08
75 #define POLCTRL_EN_ACT_L       0x10
76
77 #define POLCTRL_SYNC_POL_RISE  0x00
78 #define POLCTRL_EN_POL_RISE    0x00
79 #define POLCTRL_DATA_POL_RISE  0x00
80 #define POLCTRL_SYNC_ACT_L     0x00
81 #define POLCTRL_EN_ACT_H       0x00
82
83 #define PHACTRL_PHASE_MANUAL   0x01
84 #define DEFAULT_PHAD_QVGA     (9)
85 #define DEFAULT_COMADJ        (125)
86
87 /*
88  * This is only a psuedo I2C interface. We can't use the standard kernel
89  * routines as the interface is write only. We just assume the data is acked...
90  */
91 static void lcdtg_ssp_i2c_send(u8 data)
92 {
93         corgi_ssp_lcdtg_send(POWERREG0_ADRS, data);
94         udelay(10);
95 }
96
97 static void lcdtg_i2c_send_bit(u8 data)
98 {
99         lcdtg_ssp_i2c_send(data);
100         lcdtg_ssp_i2c_send(data | POWER0_COM_DCLK);
101         lcdtg_ssp_i2c_send(data);
102 }
103
104 static void lcdtg_i2c_send_start(u8 base)
105 {
106         lcdtg_ssp_i2c_send(base | POWER0_COM_DCLK | POWER0_COM_DOUT);
107         lcdtg_ssp_i2c_send(base | POWER0_COM_DCLK);
108         lcdtg_ssp_i2c_send(base);
109 }
110
111 static void lcdtg_i2c_send_stop(u8 base)
112 {
113         lcdtg_ssp_i2c_send(base);
114         lcdtg_ssp_i2c_send(base | POWER0_COM_DCLK);
115         lcdtg_ssp_i2c_send(base | POWER0_COM_DCLK | POWER0_COM_DOUT);
116 }
117
118 static void lcdtg_i2c_send_byte(u8 base, u8 data)
119 {
120         int i;
121         for (i = 0; i < 8; i++) {
122                 if (data & 0x80)
123                         lcdtg_i2c_send_bit(base | POWER0_COM_DOUT);
124                 else
125                         lcdtg_i2c_send_bit(base);
126                 data <<= 1;
127         }
128 }
129
130 static void lcdtg_i2c_wait_ack(u8 base)
131 {
132         lcdtg_i2c_send_bit(base);
133 }
134
135 static void lcdtg_set_common_voltage(u8 base_data, u8 data)
136 {
137         /* Set Common Voltage to M62332FP via I2C */
138         lcdtg_i2c_send_start(base_data);
139         lcdtg_i2c_send_byte(base_data, 0x9c);
140         lcdtg_i2c_wait_ack(base_data);
141         lcdtg_i2c_send_byte(base_data, 0x00);
142         lcdtg_i2c_wait_ack(base_data);
143         lcdtg_i2c_send_byte(base_data, data);
144         lcdtg_i2c_wait_ack(base_data);
145         lcdtg_i2c_send_stop(base_data);
146 }
147
148 /* Set Phase Adjuct */
149 static void lcdtg_set_phadadj(int mode)
150 {
151         int adj;
152         switch(mode) {
153                 case 480:
154                 case 640:
155                         /* Setting for VGA */
156                         adj = sharpsl_param.phadadj;
157                         if (adj < 0) {
158                                 adj = PHACTRL_PHASE_MANUAL;
159                         } else {
160                                 adj = ((adj & 0x0f) << 1) | PHACTRL_PHASE_MANUAL;
161                         }
162                         break;
163                 case 240:
164                 case 320:
165                 default:
166                         /* Setting for QVGA */
167                         adj = (DEFAULT_PHAD_QVGA << 1) | PHACTRL_PHASE_MANUAL;
168                         break;
169         }
170
171         corgi_ssp_lcdtg_send(PHACTRL_ADRS, adj);
172 }
173
174 static int lcd_inited;
175
176 static void lcdtg_hw_init(int mode)
177 {
178         if (!lcd_inited) {
179                 int comadj;
180
181                 /* Initialize Internal Logic & Port */
182                 corgi_ssp_lcdtg_send(PICTRL_ADRS, PICTRL_POWER_DOWN | PICTRL_INIOFF | PICTRL_INIT_STATE
183                                 | PICTRL_COM_SIGNAL_OFF | PICTRL_DAC_SIGNAL_OFF);
184
185                 corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_OFF
186                                 | POWER0_COM_OFF | POWER0_VCC5_OFF);
187
188                 corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF);
189
190                 /* VDD(+8V), SVSS(-4V) ON */
191                 corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON);
192                 mdelay(3);
193
194                 /* DAC ON */
195                 corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON
196                                 | POWER0_COM_OFF | POWER0_VCC5_OFF);
197
198                 /* INIB = H, INI = L  */
199                 /* PICTL[0] = H , PICTL[1] = PICTL[2] = PICTL[4] = L */
200                 corgi_ssp_lcdtg_send(PICTRL_ADRS, PICTRL_INIT_STATE | PICTRL_COM_SIGNAL_OFF);
201
202                 /* Set Common Voltage */
203                 comadj = sharpsl_param.comadj;
204                 if (comadj < 0)
205                         comadj = DEFAULT_COMADJ;
206                 lcdtg_set_common_voltage((POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_OFF), comadj);
207
208                 /* VCC5 ON, DAC ON */
209                 corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON |
210                                 POWER0_COM_OFF | POWER0_VCC5_ON);
211
212                 /* GVSS(-8V) ON, VDD ON */
213                 corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON);
214                 mdelay(2);
215
216                 /* COM SIGNAL ON (PICTL[3] = L) */
217                 corgi_ssp_lcdtg_send(PICTRL_ADRS, PICTRL_INIT_STATE);
218
219                 /* COM ON, DAC ON, VCC5_ON */
220                 corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_COM_DCLK | POWER0_COM_DOUT | POWER0_DAC_ON
221                                 | POWER0_COM_ON | POWER0_VCC5_ON);
222
223                 /* VW ON, GVSS ON, VDD ON */
224                 corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_ON | POWER1_GVSS_ON | POWER1_VDD_ON);
225
226                 /* Signals output enable */
227                 corgi_ssp_lcdtg_send(PICTRL_ADRS, 0);
228
229                 /* Set Phase Adjuct */
230                 lcdtg_set_phadadj(mode);
231
232                 /* Initialize for Input Signals from ATI */
233                 corgi_ssp_lcdtg_send(POLCTRL_ADRS, POLCTRL_SYNC_POL_RISE | POLCTRL_EN_POL_RISE
234                                 | POLCTRL_DATA_POL_RISE | POLCTRL_SYNC_ACT_L | POLCTRL_EN_ACT_H);
235                 udelay(1000);
236
237                 lcd_inited=1;
238         } else {
239                 lcdtg_set_phadadj(mode);
240         }
241
242         switch(mode) {
243                 case 480:
244                 case 640:
245                         /* Set Lcd Resolution (VGA) */
246                         corgi_ssp_lcdtg_send(RESCTL_ADRS, RESCTL_VGA);
247                         break;
248                 case 240:
249                 case 320:
250                 default:
251                         /* Set Lcd Resolution (QVGA) */
252                         corgi_ssp_lcdtg_send(RESCTL_ADRS, RESCTL_QVGA);
253                         break;
254         }
255 }
256
257 static void lcdtg_suspend(void)
258 {
259         /* 60Hz x 2 frame = 16.7msec x 2 = 33.4 msec */
260         mdelay(34);
261
262         /* (1)VW OFF */
263         corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_OFF | POWER1_GVSS_ON | POWER1_VDD_ON);
264
265         /* (2)COM OFF */
266         corgi_ssp_lcdtg_send(PICTRL_ADRS, PICTRL_COM_SIGNAL_OFF);
267         corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_ON);
268
269         /* (3)Set Common Voltage Bias 0V */
270         lcdtg_set_common_voltage(POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_ON, 0);
271
272         /* (4)GVSS OFF */
273         corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_ON);
274
275         /* (5)VCC5 OFF */
276         corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_DAC_ON | POWER0_COM_OFF | POWER0_VCC5_OFF);
277
278         /* (6)Set PDWN, INIOFF, DACOFF */
279         corgi_ssp_lcdtg_send(PICTRL_ADRS, PICTRL_INIOFF | PICTRL_DAC_SIGNAL_OFF |
280                         PICTRL_POWER_DOWN | PICTRL_COM_SIGNAL_OFF);
281
282         /* (7)DAC OFF */
283         corgi_ssp_lcdtg_send(POWERREG0_ADRS, POWER0_DAC_OFF | POWER0_COM_OFF | POWER0_VCC5_OFF);
284
285         /* (8)VDD OFF */
286         corgi_ssp_lcdtg_send(POWERREG1_ADRS, POWER1_VW_OFF | POWER1_GVSS_OFF | POWER1_VDD_OFF);
287
288         lcd_inited = 0;
289 }
290
291
292 /*
293  * Corgi w100 Frame Buffer Device
294  */
295 #ifdef CONFIG_PXA_SHARP_C7xx
296
297 #include <video/w100fb.h>
298
299 static void w100_lcdtg_suspend(struct w100fb_par *par)
300 {
301         lcdtg_suspend();
302 }
303
304 static void w100_lcdtg_init(struct w100fb_par *par)
305 {
306         lcdtg_hw_init(par->xres);
307 }
308
309
310 static struct w100_tg_info corgi_lcdtg_info = {
311         .change  = w100_lcdtg_init,
312         .suspend = w100_lcdtg_suspend,
313         .resume  = w100_lcdtg_init,
314 };
315
316 static struct w100_mem_info corgi_fb_mem = {
317         .ext_cntl          = 0x00040003,
318         .sdram_mode_reg    = 0x00650021,
319         .ext_timing_cntl   = 0x10002a4a,
320         .io_cntl           = 0x7ff87012,
321         .size              = 0x1fffff,
322 };
323
324 static struct w100_gen_regs corgi_fb_regs = {
325         .lcd_format    = 0x00000003,
326         .lcdd_cntl1    = 0x01CC0000,
327         .lcdd_cntl2    = 0x0003FFFF,
328         .genlcd_cntl1  = 0x00FFFF0D,
329         .genlcd_cntl2  = 0x003F3003,
330         .genlcd_cntl3  = 0x000102aa,
331 };
332
333 static struct w100_gpio_regs corgi_fb_gpio = {
334         .init_data1   = 0x000000bf,
335         .init_data2   = 0x00000000,
336         .gpio_dir1    = 0x00000000,
337         .gpio_oe1     = 0x03c0feff,
338         .gpio_dir2    = 0x00000000,
339         .gpio_oe2     = 0x00000000,
340 };
341
342 static struct w100_mode corgi_fb_modes[] = {
343 {
344         .xres            = 480,
345         .yres            = 640,
346         .left_margin     = 0x56,
347         .right_margin    = 0x55,
348         .upper_margin    = 0x03,
349         .lower_margin    = 0x00,
350         .crtc_ss         = 0x82360056,
351         .crtc_ls         = 0xA0280000,
352         .crtc_gs         = 0x80280028,
353         .crtc_vpos_gs    = 0x02830002,
354         .crtc_rev        = 0x00400008,
355         .crtc_dclk       = 0xA0000000,
356         .crtc_gclk       = 0x8015010F,
357         .crtc_goe        = 0x80100110,
358         .crtc_ps1_active = 0x41060010,
359         .pll_freq        = 75,
360         .fast_pll_freq   = 100,
361         .sysclk_src      = CLK_SRC_PLL,
362         .sysclk_divider  = 0,
363         .pixclk_src      = CLK_SRC_PLL,
364         .pixclk_divider  = 2,
365         .pixclk_divider_rotated = 6,
366 },{
367         .xres            = 240,
368         .yres            = 320,
369         .left_margin     = 0x27,
370         .right_margin    = 0x2e,
371         .upper_margin    = 0x01,
372         .lower_margin    = 0x00,
373         .crtc_ss         = 0x81170027,
374         .crtc_ls         = 0xA0140000,
375         .crtc_gs         = 0xC0140014,
376         .crtc_vpos_gs    = 0x00010141,
377         .crtc_rev        = 0x00400008,
378         .crtc_dclk       = 0xA0000000,
379         .crtc_gclk       = 0x8015010F,
380         .crtc_goe        = 0x80100110,
381         .crtc_ps1_active = 0x41060010,
382         .pll_freq        = 0,
383         .fast_pll_freq   = 0,
384         .sysclk_src      = CLK_SRC_XTAL,
385         .sysclk_divider  = 0,
386         .pixclk_src      = CLK_SRC_XTAL,
387         .pixclk_divider  = 1,
388         .pixclk_divider_rotated = 1,
389 },
390
391 };
392
393 static struct w100fb_mach_info corgi_fb_info = {
394         .tg         = &corgi_lcdtg_info,
395         .init_mode  = INIT_MODE_ROTATED,
396         .mem        = &corgi_fb_mem,
397         .regs       = &corgi_fb_regs,
398         .modelist   = &corgi_fb_modes[0],
399         .num_modes  = 2,
400         .gpio       = &corgi_fb_gpio,
401         .xtal_freq  = 12500000,
402         .xtal_dbl   = 0,
403 };
404
405 static struct resource corgi_fb_resources[] = {
406         [0] = {
407                 .start   = 0x08000000,
408                 .end     = 0x08ffffff,
409                 .flags   = IORESOURCE_MEM,
410         },
411 };
412
413 struct platform_device corgifb_device = {
414         .name           = "w100fb",
415         .id             = -1,
416         .num_resources  = ARRAY_SIZE(corgi_fb_resources),
417         .resource       = corgi_fb_resources,
418         .dev            = {
419                 .platform_data = &corgi_fb_info,
420                 .parent = &corgissp_device.dev,
421         },
422
423 };
424 #endif
425
426
427 /*
428  * Spitz PXA Frame Buffer Device
429  */
430 #ifdef CONFIG_PXA_SHARP_Cxx00
431
432 #include <asm/arch/pxafb.h>
433
434 void spitz_lcd_power(int on, struct fb_var_screeninfo *var)
435 {
436         if (on)
437                 lcdtg_hw_init(var->xres);
438         else
439                 lcdtg_suspend();
440 }
441
442 #endif
443
444
445 /*
446  * Corgi/Spitz Touchscreen to LCD interface
447  */
448 static unsigned long (*get_hsync_time)(struct device *dev);
449
450 static void inline sharpsl_wait_sync(int gpio)
451 {
452         while((GPLR(gpio) & GPIO_bit(gpio)) == 0);
453         while((GPLR(gpio) & GPIO_bit(gpio)) != 0);
454 }
455
456 #ifdef CONFIG_PXA_SHARP_C7xx
457 unsigned long corgi_get_hsync_len(void)
458 {
459         if (!get_hsync_time)
460                 get_hsync_time = symbol_get(w100fb_get_hsynclen);
461         if (!get_hsync_time)
462                 return 0;
463
464         return get_hsync_time(&corgifb_device.dev);
465 }
466
467 void corgi_put_hsync(void)
468 {
469         if (get_hsync_time)
470                 symbol_put(w100fb_get_hsynclen);
471         get_hsync_time = NULL;
472 }
473
474 void corgi_wait_hsync(void)
475 {
476         sharpsl_wait_sync(CORGI_GPIO_HSYNC);
477 }
478 #endif
479
480 #ifdef CONFIG_PXA_SHARP_Cxx00
481 static struct device *spitz_pxafb_dev;
482
483 static int is_pxafb_device(struct device * dev, void * data)
484 {
485         struct platform_device *pdev = container_of(dev, struct platform_device, dev);
486
487         return (strncmp(pdev->name, "pxa2xx-fb", 9) == 0);
488 }
489
490 unsigned long spitz_get_hsync_len(void)
491 {
492 #ifdef CONFIG_FB_PXA
493         if (!spitz_pxafb_dev) {
494                 spitz_pxafb_dev = bus_find_device(&platform_bus_type, NULL, NULL, is_pxafb_device);
495                 if (!spitz_pxafb_dev)
496                         return 0;
497         }
498         if (!get_hsync_time)
499                 get_hsync_time = symbol_get(pxafb_get_hsync_time);
500         if (!get_hsync_time)
501 #endif
502                 return 0;
503
504         return pxafb_get_hsync_time(spitz_pxafb_dev);
505 }
506
507 void spitz_put_hsync(void)
508 {
509         put_device(spitz_pxafb_dev);
510         if (get_hsync_time)
511                 symbol_put(pxafb_get_hsync_time);
512         spitz_pxafb_dev = NULL;
513         get_hsync_time = NULL;
514 }
515
516 void spitz_wait_hsync(void)
517 {
518         sharpsl_wait_sync(SPITZ_GPIO_HSYNC);
519 }
520 #endif
521
522 /*
523  * Corgi/Spitz Backlight Power
524  */
525 #ifdef CONFIG_PXA_SHARP_C7xx
526 void corgi_bl_set_intensity(int intensity)
527 {
528         if (intensity > 0x10)
529                 intensity += 0x10;
530
531         /* Bits 0-4 are accessed via the SSP interface */
532         corgi_ssp_blduty_set(intensity & 0x1f);
533
534         /* Bit 5 is via SCOOP */
535         if (intensity & 0x0020)
536                 set_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_BACKLIGHT_CONT);
537         else
538                 reset_scoop_gpio(&corgiscoop_device.dev, CORGI_SCP_BACKLIGHT_CONT);
539 }
540 #endif
541
542
543 #if defined(CONFIG_MACH_SPITZ) || defined(CONFIG_MACH_BORZOI)
544 void spitz_bl_set_intensity(int intensity)
545 {
546         if (intensity > 0x10)
547                 intensity += 0x10;
548
549         /* Bits 0-4 are accessed via the SSP interface */
550         corgi_ssp_blduty_set(intensity & 0x1f);
551
552         /* Bit 5 is via SCOOP */
553         if (intensity & 0x0020)
554                 reset_scoop_gpio(&spitzscoop2_device.dev, SPITZ_SCP2_BACKLIGHT_CONT);
555         else
556                 set_scoop_gpio(&spitzscoop2_device.dev, SPITZ_SCP2_BACKLIGHT_CONT);
557
558         if (intensity)
559                 set_scoop_gpio(&spitzscoop2_device.dev, SPITZ_SCP2_BACKLIGHT_ON);
560         else
561                 reset_scoop_gpio(&spitzscoop2_device.dev, SPITZ_SCP2_BACKLIGHT_ON);
562 }
563 #endif
564
565 #ifdef CONFIG_MACH_AKITA
566 void akita_bl_set_intensity(int intensity)
567 {
568         if (intensity > 0x10)
569                 intensity += 0x10;
570
571         /* Bits 0-4 are accessed via the SSP interface */
572         corgi_ssp_blduty_set(intensity & 0x1f);
573
574         /* Bit 5 is via IO-Expander */
575         if (intensity & 0x0020)
576                 akita_reset_ioexp(&akitaioexp_device.dev, AKITA_IOEXP_BACKLIGHT_CONT);
577         else
578                 akita_set_ioexp(&akitaioexp_device.dev, AKITA_IOEXP_BACKLIGHT_CONT);
579
580         if (intensity)
581                 akita_set_ioexp(&akitaioexp_device.dev, AKITA_IOEXP_BACKLIGHT_ON);
582         else
583                 akita_reset_ioexp(&akitaioexp_device.dev, AKITA_IOEXP_BACKLIGHT_ON);
584 }
585 #endif