Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/drivers/video/pxafb.c | |
3 | * | |
4 | * Copyright (C) 1999 Eric A. Thomas. | |
5 | * Copyright (C) 2004 Jean-Frederic Clere. | |
6 | * Copyright (C) 2004 Ian Campbell. | |
7 | * Copyright (C) 2004 Jeff Lackey. | |
8 | * Based on sa1100fb.c Copyright (C) 1999 Eric A. Thomas | |
9 | * which in turn is | |
10 | * Based on acornfb.c Copyright (C) Russell King. | |
11 | * | |
12 | * This file is subject to the terms and conditions of the GNU General Public | |
13 | * License. See the file COPYING in the main directory of this archive for | |
14 | * more details. | |
15 | * | |
16 | * Intel PXA250/210 LCD Controller Frame Buffer Driver | |
17 | * | |
18 | * Please direct your questions and comments on this driver to the following | |
19 | * email address: | |
20 | * | |
21 | * linux-arm-kernel@lists.arm.linux.org.uk | |
22 | * | |
23 | */ | |
24 | ||
1da177e4 LT |
25 | #include <linux/module.h> |
26 | #include <linux/moduleparam.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/sched.h> | |
29 | #include <linux/errno.h> | |
30 | #include <linux/string.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/fb.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/ioport.h> | |
37 | #include <linux/cpufreq.h> | |
d052d1be | 38 | #include <linux/platform_device.h> |
1da177e4 | 39 | #include <linux/dma-mapping.h> |
72e3524c RK |
40 | #include <linux/clk.h> |
41 | #include <linux/err.h> | |
2ba162b9 | 42 | #include <linux/completion.h> |
3c42a449 EM |
43 | #include <linux/kthread.h> |
44 | #include <linux/freezer.h> | |
1da177e4 LT |
45 | |
46 | #include <asm/hardware.h> | |
47 | #include <asm/io.h> | |
48 | #include <asm/irq.h> | |
bf1b8ab6 | 49 | #include <asm/div64.h> |
1da177e4 | 50 | #include <asm/arch/pxa-regs.h> |
a683b14d | 51 | #include <asm/arch/pxa2xx-gpio.h> |
1da177e4 LT |
52 | #include <asm/arch/bitfield.h> |
53 | #include <asm/arch/pxafb.h> | |
54 | ||
55 | /* | |
56 | * Complain if VAR is out of range. | |
57 | */ | |
58 | #define DEBUG_VAR 1 | |
59 | ||
60 | #include "pxafb.h" | |
61 | ||
62 | /* Bits which should not be set in machine configuration structures */ | |
b0086efb | 63 | #define LCCR0_INVALID_CONFIG_MASK (LCCR0_OUM | LCCR0_BM | LCCR0_QDM |\ |
64 | LCCR0_DIS | LCCR0_EFM | LCCR0_IUM |\ | |
65 | LCCR0_SFM | LCCR0_LDM | LCCR0_ENB) | |
66 | ||
67 | #define LCCR3_INVALID_CONFIG_MASK (LCCR3_HSP | LCCR3_VSP |\ | |
68 | LCCR3_PCD | LCCR3_BPP) | |
1da177e4 LT |
69 | |
70 | static void (*pxafb_backlight_power)(int); | |
d14b272b | 71 | static void (*pxafb_lcd_power)(int, struct fb_var_screeninfo *); |
1da177e4 | 72 | |
b0086efb | 73 | static int pxafb_activate_var(struct fb_var_screeninfo *var, |
74 | struct pxafb_info *); | |
1da177e4 LT |
75 | static void set_ctrlr_state(struct pxafb_info *fbi, u_int state); |
76 | ||
a7535ba7 EM |
77 | static inline unsigned long |
78 | lcd_readl(struct pxafb_info *fbi, unsigned int off) | |
79 | { | |
80 | return __raw_readl(fbi->mmio_base + off); | |
81 | } | |
82 | ||
83 | static inline void | |
84 | lcd_writel(struct pxafb_info *fbi, unsigned int off, unsigned long val) | |
85 | { | |
86 | __raw_writel(val, fbi->mmio_base + off); | |
87 | } | |
88 | ||
1da177e4 LT |
89 | static inline void pxafb_schedule_work(struct pxafb_info *fbi, u_int state) |
90 | { | |
91 | unsigned long flags; | |
92 | ||
93 | local_irq_save(flags); | |
94 | /* | |
95 | * We need to handle two requests being made at the same time. | |
96 | * There are two important cases: | |
b0086efb | 97 | * 1. When we are changing VT (C_REENABLE) while unblanking |
98 | * (C_ENABLE) We must perform the unblanking, which will | |
99 | * do our REENABLE for us. | |
100 | * 2. When we are blanking, but immediately unblank before | |
101 | * we have blanked. We do the "REENABLE" thing here as | |
102 | * well, just to be sure. | |
1da177e4 LT |
103 | */ |
104 | if (fbi->task_state == C_ENABLE && state == C_REENABLE) | |
105 | state = (u_int) -1; | |
106 | if (fbi->task_state == C_DISABLE && state == C_ENABLE) | |
107 | state = C_REENABLE; | |
108 | ||
109 | if (state != (u_int)-1) { | |
110 | fbi->task_state = state; | |
111 | schedule_work(&fbi->task); | |
112 | } | |
113 | local_irq_restore(flags); | |
114 | } | |
115 | ||
116 | static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) | |
117 | { | |
118 | chan &= 0xffff; | |
119 | chan >>= 16 - bf->length; | |
120 | return chan << bf->offset; | |
121 | } | |
122 | ||
123 | static int | |
124 | pxafb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue, | |
125 | u_int trans, struct fb_info *info) | |
126 | { | |
127 | struct pxafb_info *fbi = (struct pxafb_info *)info; | |
9ffa7396 HK |
128 | u_int val; |
129 | ||
130 | if (regno >= fbi->palette_size) | |
131 | return 1; | |
132 | ||
133 | if (fbi->fb.var.grayscale) { | |
134 | fbi->palette_cpu[regno] = ((blue >> 8) & 0x00ff); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | switch (fbi->lccr4 & LCCR4_PAL_FOR_MASK) { | |
139 | case LCCR4_PAL_FOR_0: | |
140 | val = ((red >> 0) & 0xf800); | |
141 | val |= ((green >> 5) & 0x07e0); | |
142 | val |= ((blue >> 11) & 0x001f); | |
1da177e4 | 143 | fbi->palette_cpu[regno] = val; |
9ffa7396 HK |
144 | break; |
145 | case LCCR4_PAL_FOR_1: | |
146 | val = ((red << 8) & 0x00f80000); | |
147 | val |= ((green >> 0) & 0x0000fc00); | |
148 | val |= ((blue >> 8) & 0x000000f8); | |
b0086efb | 149 | ((u32 *)(fbi->palette_cpu))[regno] = val; |
9ffa7396 HK |
150 | break; |
151 | case LCCR4_PAL_FOR_2: | |
152 | val = ((red << 8) & 0x00fc0000); | |
153 | val |= ((green >> 0) & 0x0000fc00); | |
154 | val |= ((blue >> 8) & 0x000000fc); | |
b0086efb | 155 | ((u32 *)(fbi->palette_cpu))[regno] = val; |
9ffa7396 | 156 | break; |
1da177e4 | 157 | } |
9ffa7396 HK |
158 | |
159 | return 0; | |
1da177e4 LT |
160 | } |
161 | ||
162 | static int | |
163 | pxafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, | |
164 | u_int trans, struct fb_info *info) | |
165 | { | |
166 | struct pxafb_info *fbi = (struct pxafb_info *)info; | |
167 | unsigned int val; | |
168 | int ret = 1; | |
169 | ||
170 | /* | |
171 | * If inverse mode was selected, invert all the colours | |
172 | * rather than the register number. The register number | |
173 | * is what you poke into the framebuffer to produce the | |
174 | * colour you requested. | |
175 | */ | |
176 | if (fbi->cmap_inverse) { | |
177 | red = 0xffff - red; | |
178 | green = 0xffff - green; | |
179 | blue = 0xffff - blue; | |
180 | } | |
181 | ||
182 | /* | |
183 | * If greyscale is true, then we convert the RGB value | |
184 | * to greyscale no matter what visual we are using. | |
185 | */ | |
186 | if (fbi->fb.var.grayscale) | |
187 | red = green = blue = (19595 * red + 38470 * green + | |
188 | 7471 * blue) >> 16; | |
189 | ||
190 | switch (fbi->fb.fix.visual) { | |
191 | case FB_VISUAL_TRUECOLOR: | |
192 | /* | |
193 | * 16-bit True Colour. We encode the RGB value | |
194 | * according to the RGB bitfield information. | |
195 | */ | |
196 | if (regno < 16) { | |
197 | u32 *pal = fbi->fb.pseudo_palette; | |
198 | ||
199 | val = chan_to_field(red, &fbi->fb.var.red); | |
200 | val |= chan_to_field(green, &fbi->fb.var.green); | |
201 | val |= chan_to_field(blue, &fbi->fb.var.blue); | |
202 | ||
203 | pal[regno] = val; | |
204 | ret = 0; | |
205 | } | |
206 | break; | |
207 | ||
208 | case FB_VISUAL_STATIC_PSEUDOCOLOR: | |
209 | case FB_VISUAL_PSEUDOCOLOR: | |
210 | ret = pxafb_setpalettereg(regno, red, green, blue, trans, info); | |
211 | break; | |
212 | } | |
213 | ||
214 | return ret; | |
215 | } | |
216 | ||
217 | /* | |
218 | * pxafb_bpp_to_lccr3(): | |
219 | * Convert a bits per pixel value to the correct bit pattern for LCCR3 | |
220 | */ | |
221 | static int pxafb_bpp_to_lccr3(struct fb_var_screeninfo *var) | |
222 | { | |
b0086efb | 223 | int ret = 0; |
224 | switch (var->bits_per_pixel) { | |
225 | case 1: ret = LCCR3_1BPP; break; | |
226 | case 2: ret = LCCR3_2BPP; break; | |
227 | case 4: ret = LCCR3_4BPP; break; | |
228 | case 8: ret = LCCR3_8BPP; break; | |
229 | case 16: ret = LCCR3_16BPP; break; | |
230 | } | |
231 | return ret; | |
1da177e4 LT |
232 | } |
233 | ||
234 | #ifdef CONFIG_CPU_FREQ | |
235 | /* | |
236 | * pxafb_display_dma_period() | |
237 | * Calculate the minimum period (in picoseconds) between two DMA | |
238 | * requests for the LCD controller. If we hit this, it means we're | |
239 | * doing nothing but LCD DMA. | |
240 | */ | |
241 | static unsigned int pxafb_display_dma_period(struct fb_var_screeninfo *var) | |
242 | { | |
b0086efb | 243 | /* |
244 | * Period = pixclock * bits_per_byte * bytes_per_transfer | |
245 | * / memory_bits_per_pixel; | |
246 | */ | |
247 | return var->pixclock * 8 * 16 / var->bits_per_pixel; | |
1da177e4 | 248 | } |
1da177e4 LT |
249 | #endif |
250 | ||
d14b272b RP |
251 | /* |
252 | * Select the smallest mode that allows the desired resolution to be | |
253 | * displayed. If desired parameters can be rounded up. | |
254 | */ | |
b0086efb | 255 | static struct pxafb_mode_info *pxafb_getmode(struct pxafb_mach_info *mach, |
256 | struct fb_var_screeninfo *var) | |
d14b272b RP |
257 | { |
258 | struct pxafb_mode_info *mode = NULL; | |
259 | struct pxafb_mode_info *modelist = mach->modes; | |
260 | unsigned int best_x = 0xffffffff, best_y = 0xffffffff; | |
261 | unsigned int i; | |
262 | ||
b0086efb | 263 | for (i = 0; i < mach->num_modes; i++) { |
264 | if (modelist[i].xres >= var->xres && | |
265 | modelist[i].yres >= var->yres && | |
266 | modelist[i].xres < best_x && | |
267 | modelist[i].yres < best_y && | |
268 | modelist[i].bpp >= var->bits_per_pixel) { | |
d14b272b RP |
269 | best_x = modelist[i].xres; |
270 | best_y = modelist[i].yres; | |
271 | mode = &modelist[i]; | |
272 | } | |
273 | } | |
274 | ||
275 | return mode; | |
276 | } | |
277 | ||
b0086efb | 278 | static void pxafb_setmode(struct fb_var_screeninfo *var, |
279 | struct pxafb_mode_info *mode) | |
d14b272b RP |
280 | { |
281 | var->xres = mode->xres; | |
282 | var->yres = mode->yres; | |
283 | var->bits_per_pixel = mode->bpp; | |
284 | var->pixclock = mode->pixclock; | |
285 | var->hsync_len = mode->hsync_len; | |
286 | var->left_margin = mode->left_margin; | |
287 | var->right_margin = mode->right_margin; | |
288 | var->vsync_len = mode->vsync_len; | |
289 | var->upper_margin = mode->upper_margin; | |
290 | var->lower_margin = mode->lower_margin; | |
291 | var->sync = mode->sync; | |
292 | var->grayscale = mode->cmap_greyscale; | |
293 | var->xres_virtual = var->xres; | |
294 | var->yres_virtual = var->yres; | |
295 | } | |
296 | ||
1da177e4 LT |
297 | /* |
298 | * pxafb_check_var(): | |
299 | * Get the video params out of 'var'. If a value doesn't fit, round it up, | |
300 | * if it's too big, return -EINVAL. | |
301 | * | |
302 | * Round up in the following order: bits_per_pixel, xres, | |
303 | * yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale, | |
304 | * bitfields, horizontal timing, vertical timing. | |
305 | */ | |
306 | static int pxafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
307 | { | |
308 | struct pxafb_info *fbi = (struct pxafb_info *)info; | |
d14b272b | 309 | struct pxafb_mach_info *inf = fbi->dev->platform_data; |
1da177e4 LT |
310 | |
311 | if (var->xres < MIN_XRES) | |
312 | var->xres = MIN_XRES; | |
313 | if (var->yres < MIN_YRES) | |
314 | var->yres = MIN_YRES; | |
d14b272b RP |
315 | |
316 | if (inf->fixed_modes) { | |
317 | struct pxafb_mode_info *mode; | |
318 | ||
319 | mode = pxafb_getmode(inf, var); | |
320 | if (!mode) | |
321 | return -EINVAL; | |
322 | pxafb_setmode(var, mode); | |
323 | } else { | |
324 | if (var->xres > inf->modes->xres) | |
325 | return -EINVAL; | |
326 | if (var->yres > inf->modes->yres) | |
327 | return -EINVAL; | |
328 | if (var->bits_per_pixel > inf->modes->bpp) | |
329 | return -EINVAL; | |
330 | } | |
331 | ||
1da177e4 LT |
332 | var->xres_virtual = |
333 | max(var->xres_virtual, var->xres); | |
334 | var->yres_virtual = | |
335 | max(var->yres_virtual, var->yres); | |
336 | ||
b0086efb | 337 | /* |
1da177e4 LT |
338 | * Setup the RGB parameters for this display. |
339 | * | |
340 | * The pixel packing format is described on page 7-11 of the | |
341 | * PXA2XX Developer's Manual. | |
b0086efb | 342 | */ |
1da177e4 LT |
343 | if (var->bits_per_pixel == 16) { |
344 | var->red.offset = 11; var->red.length = 5; | |
345 | var->green.offset = 5; var->green.length = 6; | |
346 | var->blue.offset = 0; var->blue.length = 5; | |
347 | var->transp.offset = var->transp.length = 0; | |
348 | } else { | |
b0086efb | 349 | var->red.offset = var->green.offset = 0; |
350 | var->blue.offset = var->transp.offset = 0; | |
1da177e4 LT |
351 | var->red.length = 8; |
352 | var->green.length = 8; | |
353 | var->blue.length = 8; | |
354 | var->transp.length = 0; | |
355 | } | |
356 | ||
357 | #ifdef CONFIG_CPU_FREQ | |
78d3cfd3 RK |
358 | pr_debug("pxafb: dma period = %d ps\n", |
359 | pxafb_display_dma_period(var)); | |
1da177e4 LT |
360 | #endif |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
365 | static inline void pxafb_set_truecolor(u_int is_true_color) | |
366 | { | |
b0086efb | 367 | /* do your machine-specific setup if needed */ |
1da177e4 LT |
368 | } |
369 | ||
370 | /* | |
371 | * pxafb_set_par(): | |
372 | * Set the user defined part of the display for the specified console | |
373 | */ | |
374 | static int pxafb_set_par(struct fb_info *info) | |
375 | { | |
376 | struct pxafb_info *fbi = (struct pxafb_info *)info; | |
377 | struct fb_var_screeninfo *var = &info->var; | |
1da177e4 | 378 | |
1da177e4 LT |
379 | if (var->bits_per_pixel == 16) |
380 | fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR; | |
381 | else if (!fbi->cmap_static) | |
382 | fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR; | |
383 | else { | |
384 | /* | |
385 | * Some people have weird ideas about wanting static | |
386 | * pseudocolor maps. I suspect their user space | |
387 | * applications are broken. | |
388 | */ | |
389 | fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR; | |
390 | } | |
391 | ||
392 | fbi->fb.fix.line_length = var->xres_virtual * | |
393 | var->bits_per_pixel / 8; | |
394 | if (var->bits_per_pixel == 16) | |
395 | fbi->palette_size = 0; | |
396 | else | |
b0086efb | 397 | fbi->palette_size = var->bits_per_pixel == 1 ? |
398 | 4 : 1 << var->bits_per_pixel; | |
1da177e4 | 399 | |
2c42dd8e | 400 | fbi->palette_cpu = (u16 *)&fbi->dma_buff->palette[0]; |
1da177e4 LT |
401 | |
402 | /* | |
403 | * Set (any) board control register to handle new color depth | |
404 | */ | |
405 | pxafb_set_truecolor(fbi->fb.fix.visual == FB_VISUAL_TRUECOLOR); | |
406 | ||
407 | if (fbi->fb.var.bits_per_pixel == 16) | |
408 | fb_dealloc_cmap(&fbi->fb.cmap); | |
409 | else | |
410 | fb_alloc_cmap(&fbi->fb.cmap, 1<<fbi->fb.var.bits_per_pixel, 0); | |
411 | ||
412 | pxafb_activate_var(var, fbi); | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
1da177e4 LT |
417 | /* |
418 | * pxafb_blank(): | |
419 | * Blank the display by setting all palette values to zero. Note, the | |
420 | * 16 bpp mode does not really use the palette, so this will not | |
421 | * blank the display in all modes. | |
422 | */ | |
423 | static int pxafb_blank(int blank, struct fb_info *info) | |
424 | { | |
425 | struct pxafb_info *fbi = (struct pxafb_info *)info; | |
426 | int i; | |
427 | ||
1da177e4 LT |
428 | switch (blank) { |
429 | case FB_BLANK_POWERDOWN: | |
430 | case FB_BLANK_VSYNC_SUSPEND: | |
431 | case FB_BLANK_HSYNC_SUSPEND: | |
432 | case FB_BLANK_NORMAL: | |
433 | if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR || | |
434 | fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR) | |
435 | for (i = 0; i < fbi->palette_size; i++) | |
436 | pxafb_setpalettereg(i, 0, 0, 0, 0, info); | |
437 | ||
438 | pxafb_schedule_work(fbi, C_DISABLE); | |
b0086efb | 439 | /* TODO if (pxafb_blank_helper) pxafb_blank_helper(blank); */ |
1da177e4 LT |
440 | break; |
441 | ||
442 | case FB_BLANK_UNBLANK: | |
b0086efb | 443 | /* TODO if (pxafb_blank_helper) pxafb_blank_helper(blank); */ |
1da177e4 LT |
444 | if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR || |
445 | fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR) | |
446 | fb_set_cmap(&fbi->fb.cmap, info); | |
447 | pxafb_schedule_work(fbi, C_ENABLE); | |
448 | } | |
449 | return 0; | |
450 | } | |
451 | ||
216d526c | 452 | static int pxafb_mmap(struct fb_info *info, |
1da177e4 LT |
453 | struct vm_area_struct *vma) |
454 | { | |
455 | struct pxafb_info *fbi = (struct pxafb_info *)info; | |
456 | unsigned long off = vma->vm_pgoff << PAGE_SHIFT; | |
457 | ||
458 | if (off < info->fix.smem_len) { | |
3c42a449 | 459 | vma->vm_pgoff += fbi->video_offset / PAGE_SIZE; |
1da177e4 LT |
460 | return dma_mmap_writecombine(fbi->dev, vma, fbi->map_cpu, |
461 | fbi->map_dma, fbi->map_size); | |
462 | } | |
463 | return -EINVAL; | |
464 | } | |
465 | ||
466 | static struct fb_ops pxafb_ops = { | |
467 | .owner = THIS_MODULE, | |
468 | .fb_check_var = pxafb_check_var, | |
469 | .fb_set_par = pxafb_set_par, | |
470 | .fb_setcolreg = pxafb_setcolreg, | |
471 | .fb_fillrect = cfb_fillrect, | |
472 | .fb_copyarea = cfb_copyarea, | |
473 | .fb_imageblit = cfb_imageblit, | |
474 | .fb_blank = pxafb_blank, | |
1da177e4 LT |
475 | .fb_mmap = pxafb_mmap, |
476 | }; | |
477 | ||
478 | /* | |
479 | * Calculate the PCD value from the clock rate (in picoseconds). | |
480 | * We take account of the PPCR clock setting. | |
481 | * From PXA Developer's Manual: | |
482 | * | |
483 | * PixelClock = LCLK | |
484 | * ------------- | |
485 | * 2 ( PCD + 1 ) | |
486 | * | |
487 | * PCD = LCLK | |
488 | * ------------- - 1 | |
489 | * 2(PixelClock) | |
490 | * | |
491 | * Where: | |
492 | * LCLK = LCD/Memory Clock | |
493 | * PCD = LCCR3[7:0] | |
494 | * | |
495 | * PixelClock here is in Hz while the pixclock argument given is the | |
496 | * period in picoseconds. Hence PixelClock = 1 / ( pixclock * 10^-12 ) | |
497 | * | |
498 | * The function get_lclk_frequency_10khz returns LCLK in units of | |
499 | * 10khz. Calling the result of this function lclk gives us the | |
500 | * following | |
501 | * | |
502 | * PCD = (lclk * 10^4 ) * ( pixclock * 10^-12 ) | |
503 | * -------------------------------------- - 1 | |
504 | * 2 | |
505 | * | |
506 | * Factoring the 10^4 and 10^-12 out gives 10^-8 == 1 / 100000000 as used below. | |
507 | */ | |
b0086efb | 508 | static inline unsigned int get_pcd(struct pxafb_info *fbi, |
509 | unsigned int pixclock) | |
1da177e4 LT |
510 | { |
511 | unsigned long long pcd; | |
512 | ||
513 | /* FIXME: Need to take into account Double Pixel Clock mode | |
72e3524c RK |
514 | * (DPC) bit? or perhaps set it based on the various clock |
515 | * speeds */ | |
516 | pcd = (unsigned long long)(clk_get_rate(fbi->clk) / 10000); | |
517 | pcd *= pixclock; | |
bf1b8ab6 | 518 | do_div(pcd, 100000000 * 2); |
1da177e4 LT |
519 | /* no need for this, since we should subtract 1 anyway. they cancel */ |
520 | /* pcd += 1; */ /* make up for integer math truncations */ | |
521 | return (unsigned int)pcd; | |
522 | } | |
523 | ||
ba44cd2d RP |
524 | /* |
525 | * Some touchscreens need hsync information from the video driver to | |
72e3524c RK |
526 | * function correctly. We export it here. Note that 'hsync_time' and |
527 | * the value returned from pxafb_get_hsync_time() is the *reciprocal* | |
528 | * of the hsync period in seconds. | |
ba44cd2d RP |
529 | */ |
530 | static inline void set_hsync_time(struct pxafb_info *fbi, unsigned int pcd) | |
531 | { | |
72e3524c | 532 | unsigned long htime; |
ba44cd2d RP |
533 | |
534 | if ((pcd == 0) || (fbi->fb.var.hsync_len == 0)) { | |
b0086efb | 535 | fbi->hsync_time = 0; |
ba44cd2d RP |
536 | return; |
537 | } | |
538 | ||
72e3524c RK |
539 | htime = clk_get_rate(fbi->clk) / (pcd * fbi->fb.var.hsync_len); |
540 | ||
ba44cd2d RP |
541 | fbi->hsync_time = htime; |
542 | } | |
543 | ||
544 | unsigned long pxafb_get_hsync_time(struct device *dev) | |
545 | { | |
546 | struct pxafb_info *fbi = dev_get_drvdata(dev); | |
547 | ||
548 | /* If display is blanked/suspended, hsync isn't active */ | |
549 | if (!fbi || (fbi->state != C_ENABLE)) | |
550 | return 0; | |
551 | ||
552 | return fbi->hsync_time; | |
553 | } | |
554 | EXPORT_SYMBOL(pxafb_get_hsync_time); | |
555 | ||
2c42dd8e | 556 | static int setup_frame_dma(struct pxafb_info *fbi, int dma, int pal, |
557 | unsigned int offset, size_t size) | |
558 | { | |
559 | struct pxafb_dma_descriptor *dma_desc, *pal_desc; | |
560 | unsigned int dma_desc_off, pal_desc_off; | |
561 | ||
562 | if (dma < 0 || dma >= DMA_MAX) | |
563 | return -EINVAL; | |
564 | ||
565 | dma_desc = &fbi->dma_buff->dma_desc[dma]; | |
566 | dma_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[dma]); | |
567 | ||
568 | dma_desc->fsadr = fbi->screen_dma + offset; | |
569 | dma_desc->fidr = 0; | |
570 | dma_desc->ldcmd = size; | |
571 | ||
572 | if (pal < 0 || pal >= PAL_MAX) { | |
573 | dma_desc->fdadr = fbi->dma_buff_phys + dma_desc_off; | |
574 | fbi->fdadr[dma] = fbi->dma_buff_phys + dma_desc_off; | |
575 | } else { | |
576 | pal_desc = &fbi->dma_buff->pal_desc[dma]; | |
577 | pal_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[pal]); | |
578 | ||
579 | pal_desc->fsadr = fbi->dma_buff_phys + pal * PALETTE_SIZE; | |
580 | pal_desc->fidr = 0; | |
581 | ||
582 | if ((fbi->lccr4 & LCCR4_PAL_FOR_MASK) == LCCR4_PAL_FOR_0) | |
583 | pal_desc->ldcmd = fbi->palette_size * sizeof(u16); | |
584 | else | |
585 | pal_desc->ldcmd = fbi->palette_size * sizeof(u32); | |
586 | ||
587 | pal_desc->ldcmd |= LDCMD_PAL; | |
588 | ||
589 | /* flip back and forth between palette and frame buffer */ | |
590 | pal_desc->fdadr = fbi->dma_buff_phys + dma_desc_off; | |
591 | dma_desc->fdadr = fbi->dma_buff_phys + pal_desc_off; | |
592 | fbi->fdadr[dma] = fbi->dma_buff_phys + dma_desc_off; | |
593 | } | |
594 | ||
595 | return 0; | |
596 | } | |
597 | ||
3c42a449 EM |
598 | #ifdef CONFIG_FB_PXA_SMARTPANEL |
599 | static int setup_smart_dma(struct pxafb_info *fbi) | |
600 | { | |
601 | struct pxafb_dma_descriptor *dma_desc; | |
602 | unsigned long dma_desc_off, cmd_buff_off; | |
603 | ||
604 | dma_desc = &fbi->dma_buff->dma_desc[DMA_CMD]; | |
605 | dma_desc_off = offsetof(struct pxafb_dma_buff, dma_desc[DMA_CMD]); | |
606 | cmd_buff_off = offsetof(struct pxafb_dma_buff, cmd_buff); | |
607 | ||
608 | dma_desc->fdadr = fbi->dma_buff_phys + dma_desc_off; | |
609 | dma_desc->fsadr = fbi->dma_buff_phys + cmd_buff_off; | |
610 | dma_desc->fidr = 0; | |
611 | dma_desc->ldcmd = fbi->n_smart_cmds * sizeof(uint16_t); | |
612 | ||
613 | fbi->fdadr[DMA_CMD] = dma_desc->fdadr; | |
614 | return 0; | |
615 | } | |
616 | ||
617 | int pxafb_smart_flush(struct fb_info *info) | |
618 | { | |
619 | struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb); | |
620 | uint32_t prsr; | |
621 | int ret = 0; | |
622 | ||
623 | /* disable controller until all registers are set up */ | |
624 | lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB); | |
625 | ||
626 | /* 1. make it an even number of commands to align on 32-bit boundary | |
627 | * 2. add the interrupt command to the end of the chain so we can | |
628 | * keep track of the end of the transfer | |
629 | */ | |
630 | ||
631 | while (fbi->n_smart_cmds & 1) | |
632 | fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_NOOP; | |
633 | ||
634 | fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_INTERRUPT; | |
635 | fbi->smart_cmds[fbi->n_smart_cmds++] = SMART_CMD_WAIT_FOR_VSYNC; | |
636 | setup_smart_dma(fbi); | |
637 | ||
638 | /* continue to execute next command */ | |
639 | prsr = lcd_readl(fbi, PRSR) | PRSR_ST_OK | PRSR_CON_NT; | |
640 | lcd_writel(fbi, PRSR, prsr); | |
641 | ||
642 | /* stop the processor in case it executed "wait for sync" cmd */ | |
643 | lcd_writel(fbi, CMDCR, 0x0001); | |
644 | ||
645 | /* don't send interrupts for fifo underruns on channel 6 */ | |
646 | lcd_writel(fbi, LCCR5, LCCR5_IUM(6)); | |
647 | ||
648 | lcd_writel(fbi, LCCR1, fbi->reg_lccr1); | |
649 | lcd_writel(fbi, LCCR2, fbi->reg_lccr2); | |
650 | lcd_writel(fbi, LCCR3, fbi->reg_lccr3); | |
651 | lcd_writel(fbi, FDADR0, fbi->fdadr[0]); | |
652 | lcd_writel(fbi, FDADR6, fbi->fdadr[6]); | |
653 | ||
654 | /* begin sending */ | |
655 | lcd_writel(fbi, LCCR0, fbi->reg_lccr0 | LCCR0_ENB); | |
656 | ||
657 | if (wait_for_completion_timeout(&fbi->command_done, HZ/2) == 0) { | |
658 | pr_warning("%s: timeout waiting for command done\n", | |
659 | __func__); | |
660 | ret = -ETIMEDOUT; | |
661 | } | |
662 | ||
663 | /* quick disable */ | |
664 | prsr = lcd_readl(fbi, PRSR) & ~(PRSR_ST_OK | PRSR_CON_NT); | |
665 | lcd_writel(fbi, PRSR, prsr); | |
666 | lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB); | |
667 | lcd_writel(fbi, FDADR6, 0); | |
668 | fbi->n_smart_cmds = 0; | |
669 | return ret; | |
670 | } | |
671 | ||
672 | int pxafb_smart_queue(struct fb_info *info, uint16_t *cmds, int n_cmds) | |
673 | { | |
674 | int i; | |
675 | struct pxafb_info *fbi = container_of(info, struct pxafb_info, fb); | |
676 | ||
677 | /* leave 2 commands for INTERRUPT and WAIT_FOR_SYNC */ | |
678 | for (i = 0; i < n_cmds; i++) { | |
679 | if (fbi->n_smart_cmds == CMD_BUFF_SIZE - 8) | |
680 | pxafb_smart_flush(info); | |
681 | ||
682 | fbi->smart_cmds[fbi->n_smart_cmds++] = *cmds++; | |
683 | } | |
684 | ||
685 | return 0; | |
686 | } | |
687 | ||
688 | static unsigned int __smart_timing(unsigned time_ns, unsigned long lcd_clk) | |
689 | { | |
690 | unsigned int t = (time_ns * (lcd_clk / 1000000) / 1000); | |
691 | return (t == 0) ? 1 : t; | |
692 | } | |
693 | ||
694 | static void setup_smart_timing(struct pxafb_info *fbi, | |
695 | struct fb_var_screeninfo *var) | |
696 | { | |
697 | struct pxafb_mach_info *inf = fbi->dev->platform_data; | |
698 | struct pxafb_mode_info *mode = &inf->modes[0]; | |
699 | unsigned long lclk = clk_get_rate(fbi->clk); | |
700 | unsigned t1, t2, t3, t4; | |
701 | ||
702 | t1 = max(mode->a0csrd_set_hld, mode->a0cswr_set_hld); | |
703 | t2 = max(mode->rd_pulse_width, mode->wr_pulse_width); | |
704 | t3 = mode->op_hold_time; | |
705 | t4 = mode->cmd_inh_time; | |
706 | ||
707 | fbi->reg_lccr1 = | |
708 | LCCR1_DisWdth(var->xres) | | |
709 | LCCR1_BegLnDel(__smart_timing(t1, lclk)) | | |
710 | LCCR1_EndLnDel(__smart_timing(t2, lclk)) | | |
711 | LCCR1_HorSnchWdth(__smart_timing(t3, lclk)); | |
712 | ||
713 | fbi->reg_lccr2 = LCCR2_DisHght(var->yres); | |
714 | fbi->reg_lccr3 = LCCR3_PixClkDiv(__smart_timing(t4, lclk)); | |
715 | ||
716 | /* FIXME: make this configurable */ | |
717 | fbi->reg_cmdcr = 1; | |
718 | } | |
719 | ||
720 | static int pxafb_smart_thread(void *arg) | |
721 | { | |
7f1133cb | 722 | struct pxafb_info *fbi = arg; |
3c42a449 EM |
723 | struct pxafb_mach_info *inf = fbi->dev->platform_data; |
724 | ||
725 | if (!fbi || !inf->smart_update) { | |
726 | pr_err("%s: not properly initialized, thread terminated\n", | |
727 | __func__); | |
728 | return -EINVAL; | |
729 | } | |
730 | ||
731 | pr_debug("%s(): task starting\n", __func__); | |
732 | ||
733 | set_freezable(); | |
734 | while (!kthread_should_stop()) { | |
735 | ||
736 | if (try_to_freeze()) | |
737 | continue; | |
738 | ||
739 | if (fbi->state == C_ENABLE) { | |
740 | inf->smart_update(&fbi->fb); | |
741 | complete(&fbi->refresh_done); | |
742 | } | |
743 | ||
744 | set_current_state(TASK_INTERRUPTIBLE); | |
745 | schedule_timeout(30 * HZ / 1000); | |
746 | } | |
747 | ||
748 | pr_debug("%s(): task ending\n", __func__); | |
749 | return 0; | |
750 | } | |
751 | ||
752 | static int pxafb_smart_init(struct pxafb_info *fbi) | |
753 | { | |
754 | fbi->smart_thread = kthread_run(pxafb_smart_thread, fbi, | |
755 | "lcd_refresh"); | |
756 | if (IS_ERR(fbi->smart_thread)) { | |
757 | printk(KERN_ERR "%s: unable to create kernel thread\n", | |
758 | __func__); | |
759 | return PTR_ERR(fbi->smart_thread); | |
760 | } | |
761 | return 0; | |
762 | } | |
763 | #else | |
764 | int pxafb_smart_queue(struct fb_info *info, uint16_t *cmds, int n_cmds) | |
765 | { | |
766 | return 0; | |
767 | } | |
768 | ||
769 | int pxafb_smart_flush(struct fb_info *info) | |
770 | { | |
771 | return 0; | |
772 | } | |
773 | #endif /* CONFIG_FB_SMART_PANEL */ | |
774 | ||
90eabbf0 EM |
775 | static void setup_parallel_timing(struct pxafb_info *fbi, |
776 | struct fb_var_screeninfo *var) | |
777 | { | |
778 | unsigned int lines_per_panel, pcd = get_pcd(fbi, var->pixclock); | |
779 | ||
780 | fbi->reg_lccr1 = | |
781 | LCCR1_DisWdth(var->xres) + | |
782 | LCCR1_HorSnchWdth(var->hsync_len) + | |
783 | LCCR1_BegLnDel(var->left_margin) + | |
784 | LCCR1_EndLnDel(var->right_margin); | |
785 | ||
786 | /* | |
787 | * If we have a dual scan LCD, we need to halve | |
788 | * the YRES parameter. | |
789 | */ | |
790 | lines_per_panel = var->yres; | |
791 | if ((fbi->lccr0 & LCCR0_SDS) == LCCR0_Dual) | |
792 | lines_per_panel /= 2; | |
793 | ||
794 | fbi->reg_lccr2 = | |
795 | LCCR2_DisHght(lines_per_panel) + | |
796 | LCCR2_VrtSnchWdth(var->vsync_len) + | |
797 | LCCR2_BegFrmDel(var->upper_margin) + | |
798 | LCCR2_EndFrmDel(var->lower_margin); | |
799 | ||
800 | fbi->reg_lccr3 = fbi->lccr3 | | |
801 | (var->sync & FB_SYNC_HOR_HIGH_ACT ? | |
802 | LCCR3_HorSnchH : LCCR3_HorSnchL) | | |
803 | (var->sync & FB_SYNC_VERT_HIGH_ACT ? | |
804 | LCCR3_VrtSnchH : LCCR3_VrtSnchL); | |
805 | ||
806 | if (pcd) { | |
807 | fbi->reg_lccr3 |= LCCR3_PixClkDiv(pcd); | |
808 | set_hsync_time(fbi, pcd); | |
809 | } | |
810 | } | |
811 | ||
1da177e4 LT |
812 | /* |
813 | * pxafb_activate_var(): | |
b0086efb | 814 | * Configures LCD Controller based on entries in var parameter. |
815 | * Settings are only written to the controller if changes were made. | |
1da177e4 | 816 | */ |
b0086efb | 817 | static int pxafb_activate_var(struct fb_var_screeninfo *var, |
818 | struct pxafb_info *fbi) | |
1da177e4 | 819 | { |
1da177e4 | 820 | u_long flags; |
2c42dd8e | 821 | size_t nbytes; |
1da177e4 | 822 | |
1da177e4 | 823 | #if DEBUG_VAR |
3c42a449 EM |
824 | if (!(fbi->lccr0 & LCCR0_LCDT)) { |
825 | if (var->xres < 16 || var->xres > 1024) | |
826 | printk(KERN_ERR "%s: invalid xres %d\n", | |
827 | fbi->fb.fix.id, var->xres); | |
828 | switch (var->bits_per_pixel) { | |
829 | case 1: | |
830 | case 2: | |
831 | case 4: | |
832 | case 8: | |
833 | case 16: | |
834 | break; | |
835 | default: | |
836 | printk(KERN_ERR "%s: invalid bit depth %d\n", | |
837 | fbi->fb.fix.id, var->bits_per_pixel); | |
838 | break; | |
839 | } | |
840 | ||
841 | if (var->hsync_len < 1 || var->hsync_len > 64) | |
842 | printk(KERN_ERR "%s: invalid hsync_len %d\n", | |
843 | fbi->fb.fix.id, var->hsync_len); | |
844 | if (var->left_margin < 1 || var->left_margin > 255) | |
845 | printk(KERN_ERR "%s: invalid left_margin %d\n", | |
846 | fbi->fb.fix.id, var->left_margin); | |
847 | if (var->right_margin < 1 || var->right_margin > 255) | |
848 | printk(KERN_ERR "%s: invalid right_margin %d\n", | |
849 | fbi->fb.fix.id, var->right_margin); | |
850 | if (var->yres < 1 || var->yres > 1024) | |
851 | printk(KERN_ERR "%s: invalid yres %d\n", | |
852 | fbi->fb.fix.id, var->yres); | |
853 | if (var->vsync_len < 1 || var->vsync_len > 64) | |
854 | printk(KERN_ERR "%s: invalid vsync_len %d\n", | |
855 | fbi->fb.fix.id, var->vsync_len); | |
856 | if (var->upper_margin < 0 || var->upper_margin > 255) | |
857 | printk(KERN_ERR "%s: invalid upper_margin %d\n", | |
858 | fbi->fb.fix.id, var->upper_margin); | |
859 | if (var->lower_margin < 0 || var->lower_margin > 255) | |
860 | printk(KERN_ERR "%s: invalid lower_margin %d\n", | |
861 | fbi->fb.fix.id, var->lower_margin); | |
1da177e4 | 862 | } |
1da177e4 | 863 | #endif |
90eabbf0 EM |
864 | /* Update shadow copy atomically */ |
865 | local_irq_save(flags); | |
1da177e4 | 866 | |
3c42a449 EM |
867 | #ifdef CONFIG_FB_PXA_SMARTPANEL |
868 | if (fbi->lccr0 & LCCR0_LCDT) | |
869 | setup_smart_timing(fbi, var); | |
870 | else | |
871 | #endif | |
872 | setup_parallel_timing(fbi, var); | |
90eabbf0 EM |
873 | |
874 | fbi->reg_lccr0 = fbi->lccr0 | | |
1da177e4 | 875 | (LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM | |
b0086efb | 876 | LCCR0_QDM | LCCR0_BM | LCCR0_OUM); |
1da177e4 | 877 | |
90eabbf0 | 878 | fbi->reg_lccr3 |= pxafb_bpp_to_lccr3(var); |
1da177e4 | 879 | |
90eabbf0 | 880 | nbytes = var->yres * fbi->fb.fix.line_length; |
1da177e4 | 881 | |
90eabbf0 EM |
882 | if ((fbi->lccr0 & LCCR0_SDS) == LCCR0_Dual) { |
883 | nbytes = nbytes / 2; | |
2c42dd8e | 884 | setup_frame_dma(fbi, DMA_LOWER, PAL_NONE, nbytes, nbytes); |
90eabbf0 | 885 | } |
2c42dd8e | 886 | |
3c42a449 | 887 | if ((var->bits_per_pixel >= 16) || (fbi->lccr0 & LCCR0_LCDT)) |
2c42dd8e | 888 | setup_frame_dma(fbi, DMA_BASE, PAL_NONE, 0, nbytes); |
889 | else | |
890 | setup_frame_dma(fbi, DMA_BASE, PAL_BASE, 0, nbytes); | |
1da177e4 | 891 | |
a7535ba7 | 892 | fbi->reg_lccr4 = lcd_readl(fbi, LCCR4) & ~LCCR4_PAL_FOR_MASK; |
9ffa7396 | 893 | fbi->reg_lccr4 |= (fbi->lccr4 & LCCR4_PAL_FOR_MASK); |
1da177e4 LT |
894 | local_irq_restore(flags); |
895 | ||
896 | /* | |
897 | * Only update the registers if the controller is enabled | |
898 | * and something has changed. | |
899 | */ | |
a7535ba7 EM |
900 | if ((lcd_readl(fbi, LCCR0) != fbi->reg_lccr0) || |
901 | (lcd_readl(fbi, LCCR1) != fbi->reg_lccr1) || | |
902 | (lcd_readl(fbi, LCCR2) != fbi->reg_lccr2) || | |
903 | (lcd_readl(fbi, LCCR3) != fbi->reg_lccr3) || | |
904 | (lcd_readl(fbi, FDADR0) != fbi->fdadr[0]) || | |
905 | (lcd_readl(fbi, FDADR1) != fbi->fdadr[1])) | |
1da177e4 LT |
906 | pxafb_schedule_work(fbi, C_REENABLE); |
907 | ||
908 | return 0; | |
909 | } | |
910 | ||
911 | /* | |
912 | * NOTE! The following functions are purely helpers for set_ctrlr_state. | |
913 | * Do not call them directly; set_ctrlr_state does the correct serialisation | |
914 | * to ensure that things happen in the right way 100% of time time. | |
915 | * -- rmk | |
916 | */ | |
917 | static inline void __pxafb_backlight_power(struct pxafb_info *fbi, int on) | |
918 | { | |
ca5da710 | 919 | pr_debug("pxafb: backlight o%s\n", on ? "n" : "ff"); |
1da177e4 | 920 | |
b0086efb | 921 | if (pxafb_backlight_power) |
922 | pxafb_backlight_power(on); | |
1da177e4 LT |
923 | } |
924 | ||
925 | static inline void __pxafb_lcd_power(struct pxafb_info *fbi, int on) | |
926 | { | |
ca5da710 | 927 | pr_debug("pxafb: LCD power o%s\n", on ? "n" : "ff"); |
1da177e4 LT |
928 | |
929 | if (pxafb_lcd_power) | |
d14b272b | 930 | pxafb_lcd_power(on, &fbi->fb.var); |
1da177e4 LT |
931 | } |
932 | ||
933 | static void pxafb_setup_gpio(struct pxafb_info *fbi) | |
934 | { | |
935 | int gpio, ldd_bits; | |
b0086efb | 936 | unsigned int lccr0 = fbi->lccr0; |
1da177e4 LT |
937 | |
938 | /* | |
939 | * setup is based on type of panel supported | |
b0086efb | 940 | */ |
1da177e4 LT |
941 | |
942 | /* 4 bit interface */ | |
943 | if ((lccr0 & LCCR0_CMS) == LCCR0_Mono && | |
944 | (lccr0 & LCCR0_SDS) == LCCR0_Sngl && | |
945 | (lccr0 & LCCR0_DPD) == LCCR0_4PixMono) | |
946 | ldd_bits = 4; | |
947 | ||
948 | /* 8 bit interface */ | |
b0086efb | 949 | else if (((lccr0 & LCCR0_CMS) == LCCR0_Mono && |
950 | ((lccr0 & LCCR0_SDS) == LCCR0_Dual || | |
951 | (lccr0 & LCCR0_DPD) == LCCR0_8PixMono)) || | |
952 | ((lccr0 & LCCR0_CMS) == LCCR0_Color && | |
953 | (lccr0 & LCCR0_PAS) == LCCR0_Pas && | |
954 | (lccr0 & LCCR0_SDS) == LCCR0_Sngl)) | |
1da177e4 LT |
955 | ldd_bits = 8; |
956 | ||
957 | /* 16 bit interface */ | |
958 | else if ((lccr0 & LCCR0_CMS) == LCCR0_Color && | |
b0086efb | 959 | ((lccr0 & LCCR0_SDS) == LCCR0_Dual || |
960 | (lccr0 & LCCR0_PAS) == LCCR0_Act)) | |
1da177e4 LT |
961 | ldd_bits = 16; |
962 | ||
963 | else { | |
b0086efb | 964 | printk(KERN_ERR "pxafb_setup_gpio: unable to determine " |
965 | "bits per pixel\n"); | |
1da177e4 | 966 | return; |
b0086efb | 967 | } |
1da177e4 LT |
968 | |
969 | for (gpio = 58; ldd_bits; gpio++, ldd_bits--) | |
970 | pxa_gpio_mode(gpio | GPIO_ALT_FN_2_OUT); | |
971 | pxa_gpio_mode(GPIO74_LCD_FCLK_MD); | |
972 | pxa_gpio_mode(GPIO75_LCD_LCLK_MD); | |
973 | pxa_gpio_mode(GPIO76_LCD_PCLK_MD); | |
974 | pxa_gpio_mode(GPIO77_LCD_ACBIAS_MD); | |
975 | } | |
976 | ||
977 | static void pxafb_enable_controller(struct pxafb_info *fbi) | |
978 | { | |
ca5da710 | 979 | pr_debug("pxafb: Enabling LCD controller\n"); |
2c42dd8e | 980 | pr_debug("fdadr0 0x%08x\n", (unsigned int) fbi->fdadr[0]); |
981 | pr_debug("fdadr1 0x%08x\n", (unsigned int) fbi->fdadr[1]); | |
ca5da710 RK |
982 | pr_debug("reg_lccr0 0x%08x\n", (unsigned int) fbi->reg_lccr0); |
983 | pr_debug("reg_lccr1 0x%08x\n", (unsigned int) fbi->reg_lccr1); | |
984 | pr_debug("reg_lccr2 0x%08x\n", (unsigned int) fbi->reg_lccr2); | |
985 | pr_debug("reg_lccr3 0x%08x\n", (unsigned int) fbi->reg_lccr3); | |
1da177e4 | 986 | |
8d372266 | 987 | /* enable LCD controller clock */ |
72e3524c | 988 | clk_enable(fbi->clk); |
8d372266 | 989 | |
3c42a449 EM |
990 | if (fbi->lccr0 & LCCR0_LCDT) |
991 | return; | |
992 | ||
1da177e4 | 993 | /* Sequence from 11.7.10 */ |
a7535ba7 EM |
994 | lcd_writel(fbi, LCCR3, fbi->reg_lccr3); |
995 | lcd_writel(fbi, LCCR2, fbi->reg_lccr2); | |
996 | lcd_writel(fbi, LCCR1, fbi->reg_lccr1); | |
997 | lcd_writel(fbi, LCCR0, fbi->reg_lccr0 & ~LCCR0_ENB); | |
998 | ||
999 | lcd_writel(fbi, FDADR0, fbi->fdadr[0]); | |
1000 | lcd_writel(fbi, FDADR1, fbi->fdadr[1]); | |
1001 | lcd_writel(fbi, LCCR0, fbi->reg_lccr0 | LCCR0_ENB); | |
1da177e4 LT |
1002 | } |
1003 | ||
1004 | static void pxafb_disable_controller(struct pxafb_info *fbi) | |
1005 | { | |
ce4fb7b8 | 1006 | uint32_t lccr0; |
1007 | ||
3c42a449 EM |
1008 | #ifdef CONFIG_FB_PXA_SMARTPANEL |
1009 | if (fbi->lccr0 & LCCR0_LCDT) { | |
1010 | wait_for_completion_timeout(&fbi->refresh_done, | |
1011 | 200 * HZ / 1000); | |
1012 | return; | |
1013 | } | |
1014 | #endif | |
1015 | ||
ce4fb7b8 | 1016 | /* Clear LCD Status Register */ |
a7535ba7 | 1017 | lcd_writel(fbi, LCSR, 0xffffffff); |
ce4fb7b8 | 1018 | |
a7535ba7 EM |
1019 | lccr0 = lcd_readl(fbi, LCCR0) & ~LCCR0_LDM; |
1020 | lcd_writel(fbi, LCCR0, lccr0); | |
1021 | lcd_writel(fbi, LCCR0, lccr0 | LCCR0_DIS); | |
1da177e4 | 1022 | |
2ba162b9 | 1023 | wait_for_completion_timeout(&fbi->disable_done, 200 * HZ / 1000); |
8d372266 NP |
1024 | |
1025 | /* disable LCD controller clock */ | |
72e3524c | 1026 | clk_disable(fbi->clk); |
1da177e4 LT |
1027 | } |
1028 | ||
1029 | /* | |
1030 | * pxafb_handle_irq: Handle 'LCD DONE' interrupts. | |
1031 | */ | |
7d12e780 | 1032 | static irqreturn_t pxafb_handle_irq(int irq, void *dev_id) |
1da177e4 LT |
1033 | { |
1034 | struct pxafb_info *fbi = dev_id; | |
a7535ba7 | 1035 | unsigned int lccr0, lcsr = lcd_readl(fbi, LCSR); |
1da177e4 LT |
1036 | |
1037 | if (lcsr & LCSR_LDD) { | |
a7535ba7 EM |
1038 | lccr0 = lcd_readl(fbi, LCCR0); |
1039 | lcd_writel(fbi, LCCR0, lccr0 | LCCR0_LDM); | |
2ba162b9 | 1040 | complete(&fbi->disable_done); |
1da177e4 LT |
1041 | } |
1042 | ||
3c42a449 EM |
1043 | #ifdef CONFIG_FB_PXA_SMARTPANEL |
1044 | if (lcsr & LCSR_CMD_INT) | |
1045 | complete(&fbi->command_done); | |
1046 | #endif | |
1047 | ||
a7535ba7 | 1048 | lcd_writel(fbi, LCSR, lcsr); |
1da177e4 LT |
1049 | return IRQ_HANDLED; |
1050 | } | |
1051 | ||
1052 | /* | |
1053 | * This function must be called from task context only, since it will | |
1054 | * sleep when disabling the LCD controller, or if we get two contending | |
1055 | * processes trying to alter state. | |
1056 | */ | |
1057 | static void set_ctrlr_state(struct pxafb_info *fbi, u_int state) | |
1058 | { | |
1059 | u_int old_state; | |
1060 | ||
1061 | down(&fbi->ctrlr_sem); | |
1062 | ||
1063 | old_state = fbi->state; | |
1064 | ||
1065 | /* | |
1066 | * Hack around fbcon initialisation. | |
1067 | */ | |
1068 | if (old_state == C_STARTUP && state == C_REENABLE) | |
1069 | state = C_ENABLE; | |
1070 | ||
1071 | switch (state) { | |
1072 | case C_DISABLE_CLKCHANGE: | |
1073 | /* | |
1074 | * Disable controller for clock change. If the | |
1075 | * controller is already disabled, then do nothing. | |
1076 | */ | |
1077 | if (old_state != C_DISABLE && old_state != C_DISABLE_PM) { | |
1078 | fbi->state = state; | |
b0086efb | 1079 | /* TODO __pxafb_lcd_power(fbi, 0); */ |
1da177e4 LT |
1080 | pxafb_disable_controller(fbi); |
1081 | } | |
1082 | break; | |
1083 | ||
1084 | case C_DISABLE_PM: | |
1085 | case C_DISABLE: | |
1086 | /* | |
1087 | * Disable controller | |
1088 | */ | |
1089 | if (old_state != C_DISABLE) { | |
1090 | fbi->state = state; | |
1091 | __pxafb_backlight_power(fbi, 0); | |
1092 | __pxafb_lcd_power(fbi, 0); | |
1093 | if (old_state != C_DISABLE_CLKCHANGE) | |
1094 | pxafb_disable_controller(fbi); | |
1095 | } | |
1096 | break; | |
1097 | ||
1098 | case C_ENABLE_CLKCHANGE: | |
1099 | /* | |
1100 | * Enable the controller after clock change. Only | |
1101 | * do this if we were disabled for the clock change. | |
1102 | */ | |
1103 | if (old_state == C_DISABLE_CLKCHANGE) { | |
1104 | fbi->state = C_ENABLE; | |
1105 | pxafb_enable_controller(fbi); | |
b0086efb | 1106 | /* TODO __pxafb_lcd_power(fbi, 1); */ |
1da177e4 LT |
1107 | } |
1108 | break; | |
1109 | ||
1110 | case C_REENABLE: | |
1111 | /* | |
1112 | * Re-enable the controller only if it was already | |
1113 | * enabled. This is so we reprogram the control | |
1114 | * registers. | |
1115 | */ | |
1116 | if (old_state == C_ENABLE) { | |
d14b272b | 1117 | __pxafb_lcd_power(fbi, 0); |
1da177e4 LT |
1118 | pxafb_disable_controller(fbi); |
1119 | pxafb_setup_gpio(fbi); | |
1120 | pxafb_enable_controller(fbi); | |
d14b272b | 1121 | __pxafb_lcd_power(fbi, 1); |
1da177e4 LT |
1122 | } |
1123 | break; | |
1124 | ||
1125 | case C_ENABLE_PM: | |
1126 | /* | |
1127 | * Re-enable the controller after PM. This is not | |
1128 | * perfect - think about the case where we were doing | |
1129 | * a clock change, and we suspended half-way through. | |
1130 | */ | |
1131 | if (old_state != C_DISABLE_PM) | |
1132 | break; | |
1133 | /* fall through */ | |
1134 | ||
1135 | case C_ENABLE: | |
1136 | /* | |
1137 | * Power up the LCD screen, enable controller, and | |
1138 | * turn on the backlight. | |
1139 | */ | |
1140 | if (old_state != C_ENABLE) { | |
1141 | fbi->state = C_ENABLE; | |
1142 | pxafb_setup_gpio(fbi); | |
1143 | pxafb_enable_controller(fbi); | |
1144 | __pxafb_lcd_power(fbi, 1); | |
1145 | __pxafb_backlight_power(fbi, 1); | |
1146 | } | |
1147 | break; | |
1148 | } | |
1149 | up(&fbi->ctrlr_sem); | |
1150 | } | |
1151 | ||
1152 | /* | |
1153 | * Our LCD controller task (which is called when we blank or unblank) | |
1154 | * via keventd. | |
1155 | */ | |
6d5aefb8 | 1156 | static void pxafb_task(struct work_struct *work) |
1da177e4 | 1157 | { |
6d5aefb8 DH |
1158 | struct pxafb_info *fbi = |
1159 | container_of(work, struct pxafb_info, task); | |
1da177e4 LT |
1160 | u_int state = xchg(&fbi->task_state, -1); |
1161 | ||
1162 | set_ctrlr_state(fbi, state); | |
1163 | } | |
1164 | ||
1165 | #ifdef CONFIG_CPU_FREQ | |
1166 | /* | |
1167 | * CPU clock speed change handler. We need to adjust the LCD timing | |
1168 | * parameters when the CPU clock is adjusted by the power management | |
1169 | * subsystem. | |
1170 | * | |
1171 | * TODO: Determine why f->new != 10*get_lclk_frequency_10khz() | |
1172 | */ | |
1173 | static int | |
1174 | pxafb_freq_transition(struct notifier_block *nb, unsigned long val, void *data) | |
1175 | { | |
1176 | struct pxafb_info *fbi = TO_INF(nb, freq_transition); | |
b0086efb | 1177 | /* TODO struct cpufreq_freqs *f = data; */ |
1da177e4 LT |
1178 | u_int pcd; |
1179 | ||
1180 | switch (val) { | |
1181 | case CPUFREQ_PRECHANGE: | |
1182 | set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE); | |
1183 | break; | |
1184 | ||
1185 | case CPUFREQ_POSTCHANGE: | |
72e3524c | 1186 | pcd = get_pcd(fbi, fbi->fb.var.pixclock); |
ba44cd2d | 1187 | set_hsync_time(fbi, pcd); |
b0086efb | 1188 | fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) | |
1189 | LCCR3_PixClkDiv(pcd); | |
1da177e4 LT |
1190 | set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE); |
1191 | break; | |
1192 | } | |
1193 | return 0; | |
1194 | } | |
1195 | ||
1196 | static int | |
1197 | pxafb_freq_policy(struct notifier_block *nb, unsigned long val, void *data) | |
1198 | { | |
1199 | struct pxafb_info *fbi = TO_INF(nb, freq_policy); | |
1200 | struct fb_var_screeninfo *var = &fbi->fb.var; | |
1201 | struct cpufreq_policy *policy = data; | |
1202 | ||
1203 | switch (val) { | |
1204 | case CPUFREQ_ADJUST: | |
1205 | case CPUFREQ_INCOMPATIBLE: | |
ac2bf5bd | 1206 | pr_debug("min dma period: %d ps, " |
1da177e4 LT |
1207 | "new clock %d kHz\n", pxafb_display_dma_period(var), |
1208 | policy->max); | |
b0086efb | 1209 | /* TODO: fill in min/max values */ |
1da177e4 | 1210 | break; |
1da177e4 LT |
1211 | } |
1212 | return 0; | |
1213 | } | |
1214 | #endif | |
1215 | ||
1216 | #ifdef CONFIG_PM | |
1217 | /* | |
1218 | * Power management hooks. Note that we won't be called from IRQ context, | |
1219 | * unlike the blank functions above, so we may sleep. | |
1220 | */ | |
3ae5eaec | 1221 | static int pxafb_suspend(struct platform_device *dev, pm_message_t state) |
1da177e4 | 1222 | { |
3ae5eaec | 1223 | struct pxafb_info *fbi = platform_get_drvdata(dev); |
1da177e4 | 1224 | |
9480e307 | 1225 | set_ctrlr_state(fbi, C_DISABLE_PM); |
1da177e4 LT |
1226 | return 0; |
1227 | } | |
1228 | ||
3ae5eaec | 1229 | static int pxafb_resume(struct platform_device *dev) |
1da177e4 | 1230 | { |
3ae5eaec | 1231 | struct pxafb_info *fbi = platform_get_drvdata(dev); |
1da177e4 | 1232 | |
9480e307 | 1233 | set_ctrlr_state(fbi, C_ENABLE_PM); |
1da177e4 LT |
1234 | return 0; |
1235 | } | |
1236 | #else | |
1237 | #define pxafb_suspend NULL | |
1238 | #define pxafb_resume NULL | |
1239 | #endif | |
1240 | ||
1241 | /* | |
1242 | * pxafb_map_video_memory(): | |
1243 | * Allocates the DRAM memory for the frame buffer. This buffer is | |
1244 | * remapped into a non-cached, non-buffered, memory region to | |
1245 | * allow palette and pixel writes to occur without flushing the | |
1246 | * cache. Once this area is remapped, all virtual memory | |
1247 | * access to the video memory should occur at the new region. | |
1248 | */ | |
1249 | static int __init pxafb_map_video_memory(struct pxafb_info *fbi) | |
1250 | { | |
1da177e4 LT |
1251 | /* |
1252 | * We reserve one page for the palette, plus the size | |
1253 | * of the framebuffer. | |
1254 | */ | |
3c42a449 EM |
1255 | fbi->video_offset = PAGE_ALIGN(sizeof(struct pxafb_dma_buff)); |
1256 | fbi->map_size = PAGE_ALIGN(fbi->fb.fix.smem_len + fbi->video_offset); | |
1da177e4 LT |
1257 | fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size, |
1258 | &fbi->map_dma, GFP_KERNEL); | |
1259 | ||
1260 | if (fbi->map_cpu) { | |
1261 | /* prevent initial garbage on screen */ | |
1262 | memset(fbi->map_cpu, 0, fbi->map_size); | |
3c42a449 EM |
1263 | fbi->fb.screen_base = fbi->map_cpu + fbi->video_offset; |
1264 | fbi->screen_dma = fbi->map_dma + fbi->video_offset; | |
1265 | ||
1da177e4 LT |
1266 | /* |
1267 | * FIXME: this is actually the wrong thing to place in | |
1268 | * smem_start. But fbdev suffers from the problem that | |
1269 | * it needs an API which doesn't exist (in this case, | |
1270 | * dma_writecombine_mmap) | |
1271 | */ | |
1272 | fbi->fb.fix.smem_start = fbi->screen_dma; | |
1da177e4 LT |
1273 | fbi->palette_size = fbi->fb.var.bits_per_pixel == 8 ? 256 : 16; |
1274 | ||
3c42a449 | 1275 | fbi->dma_buff = (void *) fbi->map_cpu; |
2c42dd8e | 1276 | fbi->dma_buff_phys = fbi->map_dma; |
3c42a449 EM |
1277 | fbi->palette_cpu = (u16 *) fbi->dma_buff->palette; |
1278 | ||
1279 | #ifdef CONFIG_FB_PXA_SMARTPANEL | |
1280 | fbi->smart_cmds = (uint16_t *) fbi->dma_buff->cmd_buff; | |
1281 | fbi->n_smart_cmds = 0; | |
1282 | #endif | |
1da177e4 LT |
1283 | } |
1284 | ||
1285 | return fbi->map_cpu ? 0 : -ENOMEM; | |
1286 | } | |
1287 | ||
84f43c30 | 1288 | static void pxafb_decode_mode_info(struct pxafb_info *fbi, |
1289 | struct pxafb_mode_info *modes, | |
1290 | unsigned int num_modes) | |
1291 | { | |
1292 | unsigned int i, smemlen; | |
1293 | ||
1294 | pxafb_setmode(&fbi->fb.var, &modes[0]); | |
1295 | ||
1296 | for (i = 0; i < num_modes; i++) { | |
1297 | smemlen = modes[i].xres * modes[i].yres * modes[i].bpp / 8; | |
1298 | if (smemlen > fbi->fb.fix.smem_len) | |
1299 | fbi->fb.fix.smem_len = smemlen; | |
1300 | } | |
1301 | } | |
1302 | ||
ebdf982a GL |
1303 | static void pxafb_decode_mach_info(struct pxafb_info *fbi, |
1304 | struct pxafb_mach_info *inf) | |
84f43c30 | 1305 | { |
1306 | unsigned int lcd_conn = inf->lcd_conn; | |
1307 | ||
1308 | fbi->cmap_inverse = inf->cmap_inverse; | |
1309 | fbi->cmap_static = inf->cmap_static; | |
1310 | ||
1311 | switch (lcd_conn & 0xf) { | |
1312 | case LCD_TYPE_MONO_STN: | |
1313 | fbi->lccr0 = LCCR0_CMS; | |
1314 | break; | |
1315 | case LCD_TYPE_MONO_DSTN: | |
1316 | fbi->lccr0 = LCCR0_CMS | LCCR0_SDS; | |
1317 | break; | |
1318 | case LCD_TYPE_COLOR_STN: | |
1319 | fbi->lccr0 = 0; | |
1320 | break; | |
1321 | case LCD_TYPE_COLOR_DSTN: | |
1322 | fbi->lccr0 = LCCR0_SDS; | |
1323 | break; | |
1324 | case LCD_TYPE_COLOR_TFT: | |
1325 | fbi->lccr0 = LCCR0_PAS; | |
1326 | break; | |
1327 | case LCD_TYPE_SMART_PANEL: | |
1328 | fbi->lccr0 = LCCR0_LCDT | LCCR0_PAS; | |
1329 | break; | |
1330 | default: | |
1331 | /* fall back to backward compatibility way */ | |
1332 | fbi->lccr0 = inf->lccr0; | |
1333 | fbi->lccr3 = inf->lccr3; | |
1334 | fbi->lccr4 = inf->lccr4; | |
ebdf982a | 1335 | goto decode_mode; |
84f43c30 | 1336 | } |
1337 | ||
1338 | if (lcd_conn == LCD_MONO_STN_8BPP) | |
1339 | fbi->lccr0 |= LCCR0_DPD; | |
1340 | ||
1341 | fbi->lccr3 = LCCR3_Acb((inf->lcd_conn >> 10) & 0xff); | |
1342 | fbi->lccr3 |= (lcd_conn & LCD_BIAS_ACTIVE_LOW) ? LCCR3_OEP : 0; | |
1343 | fbi->lccr3 |= (lcd_conn & LCD_PCLK_EDGE_FALL) ? LCCR3_PCP : 0; | |
1344 | ||
ebdf982a | 1345 | decode_mode: |
84f43c30 | 1346 | pxafb_decode_mode_info(fbi, inf->modes, inf->num_modes); |
84f43c30 | 1347 | } |
1348 | ||
1da177e4 LT |
1349 | static struct pxafb_info * __init pxafb_init_fbinfo(struct device *dev) |
1350 | { | |
1351 | struct pxafb_info *fbi; | |
1352 | void *addr; | |
1353 | struct pxafb_mach_info *inf = dev->platform_data; | |
d14b272b | 1354 | struct pxafb_mode_info *mode = inf->modes; |
1da177e4 LT |
1355 | |
1356 | /* Alloc the pxafb_info and pseudo_palette in one step */ | |
1357 | fbi = kmalloc(sizeof(struct pxafb_info) + sizeof(u32) * 16, GFP_KERNEL); | |
1358 | if (!fbi) | |
1359 | return NULL; | |
1360 | ||
1361 | memset(fbi, 0, sizeof(struct pxafb_info)); | |
1362 | fbi->dev = dev; | |
1363 | ||
72e3524c RK |
1364 | fbi->clk = clk_get(dev, "LCDCLK"); |
1365 | if (IS_ERR(fbi->clk)) { | |
1366 | kfree(fbi); | |
1367 | return NULL; | |
1368 | } | |
1369 | ||
1da177e4 LT |
1370 | strcpy(fbi->fb.fix.id, PXA_NAME); |
1371 | ||
1372 | fbi->fb.fix.type = FB_TYPE_PACKED_PIXELS; | |
1373 | fbi->fb.fix.type_aux = 0; | |
1374 | fbi->fb.fix.xpanstep = 0; | |
1375 | fbi->fb.fix.ypanstep = 0; | |
1376 | fbi->fb.fix.ywrapstep = 0; | |
1377 | fbi->fb.fix.accel = FB_ACCEL_NONE; | |
1378 | ||
1379 | fbi->fb.var.nonstd = 0; | |
1380 | fbi->fb.var.activate = FB_ACTIVATE_NOW; | |
1381 | fbi->fb.var.height = -1; | |
1382 | fbi->fb.var.width = -1; | |
1383 | fbi->fb.var.accel_flags = 0; | |
1384 | fbi->fb.var.vmode = FB_VMODE_NONINTERLACED; | |
1385 | ||
1386 | fbi->fb.fbops = &pxafb_ops; | |
1387 | fbi->fb.flags = FBINFO_DEFAULT; | |
1388 | fbi->fb.node = -1; | |
1389 | ||
1390 | addr = fbi; | |
1391 | addr = addr + sizeof(struct pxafb_info); | |
1392 | fbi->fb.pseudo_palette = addr; | |
1393 | ||
b0086efb | 1394 | fbi->state = C_STARTUP; |
1395 | fbi->task_state = (u_char)-1; | |
d14b272b | 1396 | |
84f43c30 | 1397 | pxafb_decode_mach_info(fbi, inf); |
1da177e4 LT |
1398 | |
1399 | init_waitqueue_head(&fbi->ctrlr_wait); | |
6d5aefb8 | 1400 | INIT_WORK(&fbi->task, pxafb_task); |
1da177e4 | 1401 | init_MUTEX(&fbi->ctrlr_sem); |
2ba162b9 | 1402 | init_completion(&fbi->disable_done); |
3c42a449 EM |
1403 | #ifdef CONFIG_FB_PXA_SMARTPANEL |
1404 | init_completion(&fbi->command_done); | |
1405 | init_completion(&fbi->refresh_done); | |
1406 | #endif | |
1da177e4 LT |
1407 | |
1408 | return fbi; | |
1409 | } | |
1410 | ||
1411 | #ifdef CONFIG_FB_PXA_PARAMETERS | |
b0086efb | 1412 | static int __init parse_opt_mode(struct device *dev, const char *this_opt) |
1da177e4 LT |
1413 | { |
1414 | struct pxafb_mach_info *inf = dev->platform_data; | |
817daf14 | 1415 | |
1416 | const char *name = this_opt+5; | |
1417 | unsigned int namelen = strlen(name); | |
1418 | int res_specified = 0, bpp_specified = 0; | |
1419 | unsigned int xres = 0, yres = 0, bpp = 0; | |
1420 | int yres_specified = 0; | |
1421 | int i; | |
1422 | for (i = namelen-1; i >= 0; i--) { | |
1423 | switch (name[i]) { | |
1424 | case '-': | |
1425 | namelen = i; | |
1426 | if (!bpp_specified && !yres_specified) { | |
1427 | bpp = simple_strtoul(&name[i+1], NULL, 0); | |
1428 | bpp_specified = 1; | |
1429 | } else | |
1430 | goto done; | |
1431 | break; | |
1432 | case 'x': | |
1433 | if (!yres_specified) { | |
1434 | yres = simple_strtoul(&name[i+1], NULL, 0); | |
1435 | yres_specified = 1; | |
1436 | } else | |
1437 | goto done; | |
1438 | break; | |
1439 | case '0' ... '9': | |
1440 | break; | |
1441 | default: | |
1442 | goto done; | |
1443 | } | |
1444 | } | |
1445 | if (i < 0 && yres_specified) { | |
1446 | xres = simple_strtoul(name, NULL, 0); | |
1447 | res_specified = 1; | |
1448 | } | |
1449 | done: | |
1450 | if (res_specified) { | |
1451 | dev_info(dev, "overriding resolution: %dx%d\n", xres, yres); | |
1452 | inf->modes[0].xres = xres; inf->modes[0].yres = yres; | |
1453 | } | |
1454 | if (bpp_specified) | |
1455 | switch (bpp) { | |
1456 | case 1: | |
1457 | case 2: | |
1458 | case 4: | |
1459 | case 8: | |
1460 | case 16: | |
1461 | inf->modes[0].bpp = bpp; | |
1462 | dev_info(dev, "overriding bit depth: %d\n", bpp); | |
1463 | break; | |
1464 | default: | |
1465 | dev_err(dev, "Depth %d is not valid\n", bpp); | |
1466 | return -EINVAL; | |
1467 | } | |
1468 | return 0; | |
1469 | } | |
1470 | ||
b0086efb | 1471 | static int __init parse_opt(struct device *dev, char *this_opt) |
817daf14 | 1472 | { |
1473 | struct pxafb_mach_info *inf = dev->platform_data; | |
1474 | struct pxafb_mode_info *mode = &inf->modes[0]; | |
1475 | char s[64]; | |
1476 | ||
1477 | s[0] = '\0'; | |
1478 | ||
1479 | if (!strncmp(this_opt, "mode:", 5)) { | |
1480 | return parse_opt_mode(dev, this_opt); | |
1481 | } else if (!strncmp(this_opt, "pixclock:", 9)) { | |
1482 | mode->pixclock = simple_strtoul(this_opt+9, NULL, 0); | |
1483 | sprintf(s, "pixclock: %ld\n", mode->pixclock); | |
1484 | } else if (!strncmp(this_opt, "left:", 5)) { | |
1485 | mode->left_margin = simple_strtoul(this_opt+5, NULL, 0); | |
1486 | sprintf(s, "left: %u\n", mode->left_margin); | |
1487 | } else if (!strncmp(this_opt, "right:", 6)) { | |
1488 | mode->right_margin = simple_strtoul(this_opt+6, NULL, 0); | |
1489 | sprintf(s, "right: %u\n", mode->right_margin); | |
1490 | } else if (!strncmp(this_opt, "upper:", 6)) { | |
1491 | mode->upper_margin = simple_strtoul(this_opt+6, NULL, 0); | |
1492 | sprintf(s, "upper: %u\n", mode->upper_margin); | |
1493 | } else if (!strncmp(this_opt, "lower:", 6)) { | |
1494 | mode->lower_margin = simple_strtoul(this_opt+6, NULL, 0); | |
1495 | sprintf(s, "lower: %u\n", mode->lower_margin); | |
1496 | } else if (!strncmp(this_opt, "hsynclen:", 9)) { | |
1497 | mode->hsync_len = simple_strtoul(this_opt+9, NULL, 0); | |
1498 | sprintf(s, "hsynclen: %u\n", mode->hsync_len); | |
1499 | } else if (!strncmp(this_opt, "vsynclen:", 9)) { | |
1500 | mode->vsync_len = simple_strtoul(this_opt+9, NULL, 0); | |
1501 | sprintf(s, "vsynclen: %u\n", mode->vsync_len); | |
1502 | } else if (!strncmp(this_opt, "hsync:", 6)) { | |
1503 | if (simple_strtoul(this_opt+6, NULL, 0) == 0) { | |
1504 | sprintf(s, "hsync: Active Low\n"); | |
1505 | mode->sync &= ~FB_SYNC_HOR_HIGH_ACT; | |
1506 | } else { | |
1507 | sprintf(s, "hsync: Active High\n"); | |
1508 | mode->sync |= FB_SYNC_HOR_HIGH_ACT; | |
1509 | } | |
1510 | } else if (!strncmp(this_opt, "vsync:", 6)) { | |
1511 | if (simple_strtoul(this_opt+6, NULL, 0) == 0) { | |
1512 | sprintf(s, "vsync: Active Low\n"); | |
1513 | mode->sync &= ~FB_SYNC_VERT_HIGH_ACT; | |
1514 | } else { | |
1515 | sprintf(s, "vsync: Active High\n"); | |
1516 | mode->sync |= FB_SYNC_VERT_HIGH_ACT; | |
1517 | } | |
1518 | } else if (!strncmp(this_opt, "dpc:", 4)) { | |
1519 | if (simple_strtoul(this_opt+4, NULL, 0) == 0) { | |
1520 | sprintf(s, "double pixel clock: false\n"); | |
1521 | inf->lccr3 &= ~LCCR3_DPC; | |
1522 | } else { | |
1523 | sprintf(s, "double pixel clock: true\n"); | |
1524 | inf->lccr3 |= LCCR3_DPC; | |
1525 | } | |
1526 | } else if (!strncmp(this_opt, "outputen:", 9)) { | |
1527 | if (simple_strtoul(this_opt+9, NULL, 0) == 0) { | |
1528 | sprintf(s, "output enable: active low\n"); | |
1529 | inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnL; | |
1530 | } else { | |
1531 | sprintf(s, "output enable: active high\n"); | |
1532 | inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnH; | |
1533 | } | |
1534 | } else if (!strncmp(this_opt, "pixclockpol:", 12)) { | |
1535 | if (simple_strtoul(this_opt+12, NULL, 0) == 0) { | |
1536 | sprintf(s, "pixel clock polarity: falling edge\n"); | |
1537 | inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixFlEdg; | |
1538 | } else { | |
1539 | sprintf(s, "pixel clock polarity: rising edge\n"); | |
1540 | inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixRsEdg; | |
1541 | } | |
1542 | } else if (!strncmp(this_opt, "color", 5)) { | |
1543 | inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Color; | |
1544 | } else if (!strncmp(this_opt, "mono", 4)) { | |
1545 | inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Mono; | |
1546 | } else if (!strncmp(this_opt, "active", 6)) { | |
1547 | inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Act; | |
1548 | } else if (!strncmp(this_opt, "passive", 7)) { | |
1549 | inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Pas; | |
1550 | } else if (!strncmp(this_opt, "single", 6)) { | |
1551 | inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Sngl; | |
1552 | } else if (!strncmp(this_opt, "dual", 4)) { | |
1553 | inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Dual; | |
1554 | } else if (!strncmp(this_opt, "4pix", 4)) { | |
1555 | inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_4PixMono; | |
1556 | } else if (!strncmp(this_opt, "8pix", 4)) { | |
1557 | inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_8PixMono; | |
1558 | } else { | |
1559 | dev_err(dev, "unknown option: %s\n", this_opt); | |
1560 | return -EINVAL; | |
1561 | } | |
1562 | ||
1563 | if (s[0] != '\0') | |
1564 | dev_info(dev, "override %s", s); | |
1565 | ||
1566 | return 0; | |
1567 | } | |
1568 | ||
1569 | static int __init pxafb_parse_options(struct device *dev, char *options) | |
1570 | { | |
1da177e4 | 1571 | char *this_opt; |
817daf14 | 1572 | int ret; |
1da177e4 | 1573 | |
817daf14 | 1574 | if (!options || !*options) |
1575 | return 0; | |
1da177e4 LT |
1576 | |
1577 | dev_dbg(dev, "options are \"%s\"\n", options ? options : "null"); | |
1578 | ||
1579 | /* could be made table driven or similar?... */ | |
817daf14 | 1580 | while ((this_opt = strsep(&options, ",")) != NULL) { |
1581 | ret = parse_opt(dev, this_opt); | |
1582 | if (ret) | |
1583 | return ret; | |
1584 | } | |
1585 | return 0; | |
1da177e4 | 1586 | } |
92ac73c1 | 1587 | |
1588 | static char g_options[256] __devinitdata = ""; | |
1589 | ||
1590 | #ifndef CONFIG_MODULES | |
1591 | static int __devinit pxafb_setup_options(void) | |
1592 | { | |
1593 | char *options = NULL; | |
1594 | ||
1595 | if (fb_get_options("pxafb", &options)) | |
1596 | return -ENODEV; | |
1597 | ||
1598 | if (options) | |
1599 | strlcpy(g_options, options, sizeof(g_options)); | |
1600 | ||
1601 | return 0; | |
1602 | } | |
1603 | #else | |
1604 | #define pxafb_setup_options() (0) | |
1605 | ||
1606 | module_param_string(options, g_options, sizeof(g_options), 0); | |
1607 | MODULE_PARM_DESC(options, "LCD parameters (see Documentation/fb/pxafb.txt)"); | |
1608 | #endif | |
1609 | ||
1610 | #else | |
1611 | #define pxafb_parse_options(...) (0) | |
1612 | #define pxafb_setup_options() (0) | |
1da177e4 LT |
1613 | #endif |
1614 | ||
ac2bf5bd | 1615 | static int __init pxafb_probe(struct platform_device *dev) |
1da177e4 LT |
1616 | { |
1617 | struct pxafb_info *fbi; | |
1618 | struct pxafb_mach_info *inf; | |
ce4fb7b8 | 1619 | struct resource *r; |
1620 | int irq, ret; | |
1da177e4 | 1621 | |
2cbbb3b5 | 1622 | dev_dbg(&dev->dev, "pxafb_probe\n"); |
1da177e4 | 1623 | |
3ae5eaec | 1624 | inf = dev->dev.platform_data; |
1da177e4 LT |
1625 | ret = -ENOMEM; |
1626 | fbi = NULL; | |
1627 | if (!inf) | |
1628 | goto failed; | |
1629 | ||
3ae5eaec | 1630 | ret = pxafb_parse_options(&dev->dev, g_options); |
1da177e4 LT |
1631 | if (ret < 0) |
1632 | goto failed; | |
1da177e4 LT |
1633 | |
1634 | #ifdef DEBUG_VAR | |
b0086efb | 1635 | /* Check for various illegal bit-combinations. Currently only |
1da177e4 LT |
1636 | * a warning is given. */ |
1637 | ||
b0086efb | 1638 | if (inf->lccr0 & LCCR0_INVALID_CONFIG_MASK) |
1639 | dev_warn(&dev->dev, "machine LCCR0 setting contains " | |
1640 | "illegal bits: %08x\n", | |
1641 | inf->lccr0 & LCCR0_INVALID_CONFIG_MASK); | |
1642 | if (inf->lccr3 & LCCR3_INVALID_CONFIG_MASK) | |
1643 | dev_warn(&dev->dev, "machine LCCR3 setting contains " | |
1644 | "illegal bits: %08x\n", | |
1645 | inf->lccr3 & LCCR3_INVALID_CONFIG_MASK); | |
1646 | if (inf->lccr0 & LCCR0_DPD && | |
1da177e4 LT |
1647 | ((inf->lccr0 & LCCR0_PAS) != LCCR0_Pas || |
1648 | (inf->lccr0 & LCCR0_SDS) != LCCR0_Sngl || | |
1649 | (inf->lccr0 & LCCR0_CMS) != LCCR0_Mono)) | |
b0086efb | 1650 | dev_warn(&dev->dev, "Double Pixel Data (DPD) mode is " |
1651 | "only valid in passive mono" | |
1652 | " single panel mode\n"); | |
1653 | if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Act && | |
1da177e4 | 1654 | (inf->lccr0 & LCCR0_SDS) == LCCR0_Dual) |
b0086efb | 1655 | dev_warn(&dev->dev, "Dual panel only valid in passive mode\n"); |
1656 | if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Pas && | |
1657 | (inf->modes->upper_margin || inf->modes->lower_margin)) | |
1658 | dev_warn(&dev->dev, "Upper and lower margins must be 0 in " | |
1659 | "passive mode\n"); | |
1da177e4 LT |
1660 | #endif |
1661 | ||
b0086efb | 1662 | dev_dbg(&dev->dev, "got a %dx%dx%d LCD\n", |
1663 | inf->modes->xres, | |
1664 | inf->modes->yres, | |
1665 | inf->modes->bpp); | |
1666 | if (inf->modes->xres == 0 || | |
1667 | inf->modes->yres == 0 || | |
1668 | inf->modes->bpp == 0) { | |
3ae5eaec | 1669 | dev_err(&dev->dev, "Invalid resolution or bit depth\n"); |
1da177e4 LT |
1670 | ret = -EINVAL; |
1671 | goto failed; | |
1672 | } | |
1673 | pxafb_backlight_power = inf->pxafb_backlight_power; | |
1674 | pxafb_lcd_power = inf->pxafb_lcd_power; | |
3ae5eaec | 1675 | fbi = pxafb_init_fbinfo(&dev->dev); |
1da177e4 | 1676 | if (!fbi) { |
b0086efb | 1677 | /* only reason for pxafb_init_fbinfo to fail is kmalloc */ |
3ae5eaec | 1678 | dev_err(&dev->dev, "Failed to initialize framebuffer device\n"); |
b0086efb | 1679 | ret = -ENOMEM; |
1da177e4 LT |
1680 | goto failed; |
1681 | } | |
1682 | ||
ce4fb7b8 | 1683 | r = platform_get_resource(dev, IORESOURCE_MEM, 0); |
1684 | if (r == NULL) { | |
1685 | dev_err(&dev->dev, "no I/O memory resource defined\n"); | |
1686 | ret = -ENODEV; | |
1687 | goto failed; | |
1688 | } | |
1689 | ||
1690 | r = request_mem_region(r->start, r->end - r->start + 1, dev->name); | |
1691 | if (r == NULL) { | |
1692 | dev_err(&dev->dev, "failed to request I/O memory\n"); | |
1693 | ret = -EBUSY; | |
1694 | goto failed; | |
1695 | } | |
1696 | ||
1697 | fbi->mmio_base = ioremap(r->start, r->end - r->start + 1); | |
1698 | if (fbi->mmio_base == NULL) { | |
1699 | dev_err(&dev->dev, "failed to map I/O memory\n"); | |
1700 | ret = -EBUSY; | |
1701 | goto failed_free_res; | |
1702 | } | |
1703 | ||
1da177e4 LT |
1704 | /* Initialize video memory */ |
1705 | ret = pxafb_map_video_memory(fbi); | |
1706 | if (ret) { | |
3ae5eaec | 1707 | dev_err(&dev->dev, "Failed to allocate video RAM: %d\n", ret); |
1da177e4 | 1708 | ret = -ENOMEM; |
ce4fb7b8 | 1709 | goto failed_free_io; |
1da177e4 | 1710 | } |
1da177e4 | 1711 | |
ce4fb7b8 | 1712 | irq = platform_get_irq(dev, 0); |
1713 | if (irq < 0) { | |
1714 | dev_err(&dev->dev, "no IRQ defined\n"); | |
1715 | ret = -ENODEV; | |
1716 | goto failed_free_mem; | |
1717 | } | |
1718 | ||
1719 | ret = request_irq(irq, pxafb_handle_irq, IRQF_DISABLED, "LCD", fbi); | |
1da177e4 | 1720 | if (ret) { |
3ae5eaec | 1721 | dev_err(&dev->dev, "request_irq failed: %d\n", ret); |
1da177e4 | 1722 | ret = -EBUSY; |
ce4fb7b8 | 1723 | goto failed_free_mem; |
1da177e4 LT |
1724 | } |
1725 | ||
3c42a449 EM |
1726 | #ifdef CONFIG_FB_PXA_SMARTPANEL |
1727 | ret = pxafb_smart_init(fbi); | |
1728 | if (ret) { | |
1729 | dev_err(&dev->dev, "failed to initialize smartpanel\n"); | |
1730 | goto failed_free_irq; | |
1731 | } | |
1732 | #endif | |
1da177e4 LT |
1733 | /* |
1734 | * This makes sure that our colour bitfield | |
1735 | * descriptors are correctly initialised. | |
1736 | */ | |
1737 | pxafb_check_var(&fbi->fb.var, &fbi->fb); | |
1738 | pxafb_set_par(&fbi->fb); | |
1739 | ||
3ae5eaec | 1740 | platform_set_drvdata(dev, fbi); |
1da177e4 LT |
1741 | |
1742 | ret = register_framebuffer(&fbi->fb); | |
1743 | if (ret < 0) { | |
b0086efb | 1744 | dev_err(&dev->dev, |
1745 | "Failed to register framebuffer device: %d\n", ret); | |
ce4fb7b8 | 1746 | goto failed_free_irq; |
1da177e4 LT |
1747 | } |
1748 | ||
1da177e4 LT |
1749 | #ifdef CONFIG_CPU_FREQ |
1750 | fbi->freq_transition.notifier_call = pxafb_freq_transition; | |
1751 | fbi->freq_policy.notifier_call = pxafb_freq_policy; | |
b0086efb | 1752 | cpufreq_register_notifier(&fbi->freq_transition, |
1753 | CPUFREQ_TRANSITION_NOTIFIER); | |
1754 | cpufreq_register_notifier(&fbi->freq_policy, | |
1755 | CPUFREQ_POLICY_NOTIFIER); | |
1da177e4 LT |
1756 | #endif |
1757 | ||
1758 | /* | |
1759 | * Ok, now enable the LCD controller | |
1760 | */ | |
1761 | set_ctrlr_state(fbi, C_ENABLE); | |
1762 | ||
1763 | return 0; | |
1764 | ||
ce4fb7b8 | 1765 | failed_free_irq: |
1766 | free_irq(irq, fbi); | |
1767 | failed_free_res: | |
1768 | release_mem_region(r->start, r->end - r->start + 1); | |
1769 | failed_free_io: | |
1770 | iounmap(fbi->mmio_base); | |
1771 | failed_free_mem: | |
1772 | dma_free_writecombine(&dev->dev, fbi->map_size, | |
1773 | fbi->map_cpu, fbi->map_dma); | |
1da177e4 | 1774 | failed: |
3ae5eaec | 1775 | platform_set_drvdata(dev, NULL); |
1da177e4 LT |
1776 | kfree(fbi); |
1777 | return ret; | |
1778 | } | |
1779 | ||
9f17f287 JK |
1780 | static int __devexit pxafb_remove(struct platform_device *dev) |
1781 | { | |
1782 | struct pxafb_info *fbi = platform_get_drvdata(dev); | |
1783 | struct resource *r; | |
1784 | int irq; | |
1785 | struct fb_info *info; | |
1786 | ||
1787 | if (!fbi) | |
1788 | return 0; | |
1789 | ||
1790 | info = &fbi->fb; | |
1791 | ||
1792 | unregister_framebuffer(info); | |
1793 | ||
1794 | pxafb_disable_controller(fbi); | |
1795 | ||
1796 | if (fbi->fb.cmap.len) | |
1797 | fb_dealloc_cmap(&fbi->fb.cmap); | |
1798 | ||
1799 | irq = platform_get_irq(dev, 0); | |
1800 | free_irq(irq, fbi); | |
1801 | ||
1802 | dma_free_writecombine(&dev->dev, fbi->map_size, | |
1803 | fbi->map_cpu, fbi->map_dma); | |
1804 | ||
1805 | iounmap(fbi->mmio_base); | |
1806 | ||
1807 | r = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
1808 | release_mem_region(r->start, r->end - r->start + 1); | |
1809 | ||
1810 | clk_put(fbi->clk); | |
1811 | kfree(fbi); | |
1812 | ||
1813 | return 0; | |
1814 | } | |
1815 | ||
3ae5eaec | 1816 | static struct platform_driver pxafb_driver = { |
1da177e4 | 1817 | .probe = pxafb_probe, |
9f17f287 | 1818 | .remove = pxafb_remove, |
1da177e4 LT |
1819 | .suspend = pxafb_suspend, |
1820 | .resume = pxafb_resume, | |
3ae5eaec | 1821 | .driver = { |
9f17f287 | 1822 | .owner = THIS_MODULE, |
3ae5eaec RK |
1823 | .name = "pxa2xx-fb", |
1824 | }, | |
1da177e4 LT |
1825 | }; |
1826 | ||
ac2bf5bd | 1827 | static int __devinit pxafb_init(void) |
1da177e4 | 1828 | { |
92ac73c1 | 1829 | if (pxafb_setup_options()) |
1830 | return -EINVAL; | |
1da177e4 | 1831 | |
3ae5eaec | 1832 | return platform_driver_register(&pxafb_driver); |
1da177e4 LT |
1833 | } |
1834 | ||
9f17f287 JK |
1835 | static void __exit pxafb_exit(void) |
1836 | { | |
1837 | platform_driver_unregister(&pxafb_driver); | |
1838 | } | |
1839 | ||
1da177e4 | 1840 | module_init(pxafb_init); |
9f17f287 | 1841 | module_exit(pxafb_exit); |
1da177e4 LT |
1842 | |
1843 | MODULE_DESCRIPTION("loadable framebuffer driver for PXA"); | |
1844 | MODULE_LICENSE("GPL"); |