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> | |
1da177e4 LT |
42 | |
43 | #include <asm/hardware.h> | |
44 | #include <asm/io.h> | |
45 | #include <asm/irq.h> | |
bf1b8ab6 | 46 | #include <asm/div64.h> |
1da177e4 LT |
47 | #include <asm/arch/pxa-regs.h> |
48 | #include <asm/arch/bitfield.h> | |
49 | #include <asm/arch/pxafb.h> | |
50 | ||
51 | /* | |
52 | * Complain if VAR is out of range. | |
53 | */ | |
54 | #define DEBUG_VAR 1 | |
55 | ||
56 | #include "pxafb.h" | |
57 | ||
58 | /* Bits which should not be set in machine configuration structures */ | |
59 | #define LCCR0_INVALID_CONFIG_MASK (LCCR0_OUM|LCCR0_BM|LCCR0_QDM|LCCR0_DIS|LCCR0_EFM|LCCR0_IUM|LCCR0_SFM|LCCR0_LDM|LCCR0_ENB) | |
60 | #define LCCR3_INVALID_CONFIG_MASK (LCCR3_HSP|LCCR3_VSP|LCCR3_PCD|LCCR3_BPP) | |
61 | ||
62 | static void (*pxafb_backlight_power)(int); | |
d14b272b | 63 | static void (*pxafb_lcd_power)(int, struct fb_var_screeninfo *); |
1da177e4 LT |
64 | |
65 | static int pxafb_activate_var(struct fb_var_screeninfo *var, struct pxafb_info *); | |
66 | static void set_ctrlr_state(struct pxafb_info *fbi, u_int state); | |
67 | ||
68 | #ifdef CONFIG_FB_PXA_PARAMETERS | |
69 | #define PXAFB_OPTIONS_SIZE 256 | |
1e6a20c9 | 70 | static char g_options[PXAFB_OPTIONS_SIZE] __devinitdata = ""; |
1da177e4 LT |
71 | #endif |
72 | ||
73 | static inline void pxafb_schedule_work(struct pxafb_info *fbi, u_int state) | |
74 | { | |
75 | unsigned long flags; | |
76 | ||
77 | local_irq_save(flags); | |
78 | /* | |
79 | * We need to handle two requests being made at the same time. | |
80 | * There are two important cases: | |
81 | * 1. When we are changing VT (C_REENABLE) while unblanking (C_ENABLE) | |
82 | * We must perform the unblanking, which will do our REENABLE for us. | |
83 | * 2. When we are blanking, but immediately unblank before we have | |
84 | * blanked. We do the "REENABLE" thing here as well, just to be sure. | |
85 | */ | |
86 | if (fbi->task_state == C_ENABLE && state == C_REENABLE) | |
87 | state = (u_int) -1; | |
88 | if (fbi->task_state == C_DISABLE && state == C_ENABLE) | |
89 | state = C_REENABLE; | |
90 | ||
91 | if (state != (u_int)-1) { | |
92 | fbi->task_state = state; | |
93 | schedule_work(&fbi->task); | |
94 | } | |
95 | local_irq_restore(flags); | |
96 | } | |
97 | ||
98 | static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) | |
99 | { | |
100 | chan &= 0xffff; | |
101 | chan >>= 16 - bf->length; | |
102 | return chan << bf->offset; | |
103 | } | |
104 | ||
105 | static int | |
106 | pxafb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue, | |
107 | u_int trans, struct fb_info *info) | |
108 | { | |
109 | struct pxafb_info *fbi = (struct pxafb_info *)info; | |
9ffa7396 HK |
110 | u_int val; |
111 | ||
112 | if (regno >= fbi->palette_size) | |
113 | return 1; | |
114 | ||
115 | if (fbi->fb.var.grayscale) { | |
116 | fbi->palette_cpu[regno] = ((blue >> 8) & 0x00ff); | |
117 | return 0; | |
118 | } | |
119 | ||
120 | switch (fbi->lccr4 & LCCR4_PAL_FOR_MASK) { | |
121 | case LCCR4_PAL_FOR_0: | |
122 | val = ((red >> 0) & 0xf800); | |
123 | val |= ((green >> 5) & 0x07e0); | |
124 | val |= ((blue >> 11) & 0x001f); | |
1da177e4 | 125 | fbi->palette_cpu[regno] = val; |
9ffa7396 HK |
126 | break; |
127 | case LCCR4_PAL_FOR_1: | |
128 | val = ((red << 8) & 0x00f80000); | |
129 | val |= ((green >> 0) & 0x0000fc00); | |
130 | val |= ((blue >> 8) & 0x000000f8); | |
131 | ((u32*)(fbi->palette_cpu))[regno] = val; | |
132 | break; | |
133 | case LCCR4_PAL_FOR_2: | |
134 | val = ((red << 8) & 0x00fc0000); | |
135 | val |= ((green >> 0) & 0x0000fc00); | |
136 | val |= ((blue >> 8) & 0x000000fc); | |
137 | ((u32*)(fbi->palette_cpu))[regno] = val; | |
138 | break; | |
1da177e4 | 139 | } |
9ffa7396 HK |
140 | |
141 | return 0; | |
1da177e4 LT |
142 | } |
143 | ||
144 | static int | |
145 | pxafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, | |
146 | u_int trans, struct fb_info *info) | |
147 | { | |
148 | struct pxafb_info *fbi = (struct pxafb_info *)info; | |
149 | unsigned int val; | |
150 | int ret = 1; | |
151 | ||
152 | /* | |
153 | * If inverse mode was selected, invert all the colours | |
154 | * rather than the register number. The register number | |
155 | * is what you poke into the framebuffer to produce the | |
156 | * colour you requested. | |
157 | */ | |
158 | if (fbi->cmap_inverse) { | |
159 | red = 0xffff - red; | |
160 | green = 0xffff - green; | |
161 | blue = 0xffff - blue; | |
162 | } | |
163 | ||
164 | /* | |
165 | * If greyscale is true, then we convert the RGB value | |
166 | * to greyscale no matter what visual we are using. | |
167 | */ | |
168 | if (fbi->fb.var.grayscale) | |
169 | red = green = blue = (19595 * red + 38470 * green + | |
170 | 7471 * blue) >> 16; | |
171 | ||
172 | switch (fbi->fb.fix.visual) { | |
173 | case FB_VISUAL_TRUECOLOR: | |
174 | /* | |
175 | * 16-bit True Colour. We encode the RGB value | |
176 | * according to the RGB bitfield information. | |
177 | */ | |
178 | if (regno < 16) { | |
179 | u32 *pal = fbi->fb.pseudo_palette; | |
180 | ||
181 | val = chan_to_field(red, &fbi->fb.var.red); | |
182 | val |= chan_to_field(green, &fbi->fb.var.green); | |
183 | val |= chan_to_field(blue, &fbi->fb.var.blue); | |
184 | ||
185 | pal[regno] = val; | |
186 | ret = 0; | |
187 | } | |
188 | break; | |
189 | ||
190 | case FB_VISUAL_STATIC_PSEUDOCOLOR: | |
191 | case FB_VISUAL_PSEUDOCOLOR: | |
192 | ret = pxafb_setpalettereg(regno, red, green, blue, trans, info); | |
193 | break; | |
194 | } | |
195 | ||
196 | return ret; | |
197 | } | |
198 | ||
199 | /* | |
200 | * pxafb_bpp_to_lccr3(): | |
201 | * Convert a bits per pixel value to the correct bit pattern for LCCR3 | |
202 | */ | |
203 | static int pxafb_bpp_to_lccr3(struct fb_var_screeninfo *var) | |
204 | { | |
205 | int ret = 0; | |
206 | switch (var->bits_per_pixel) { | |
207 | case 1: ret = LCCR3_1BPP; break; | |
208 | case 2: ret = LCCR3_2BPP; break; | |
209 | case 4: ret = LCCR3_4BPP; break; | |
210 | case 8: ret = LCCR3_8BPP; break; | |
211 | case 16: ret = LCCR3_16BPP; break; | |
212 | } | |
213 | return ret; | |
214 | } | |
215 | ||
216 | #ifdef CONFIG_CPU_FREQ | |
217 | /* | |
218 | * pxafb_display_dma_period() | |
219 | * Calculate the minimum period (in picoseconds) between two DMA | |
220 | * requests for the LCD controller. If we hit this, it means we're | |
221 | * doing nothing but LCD DMA. | |
222 | */ | |
223 | static unsigned int pxafb_display_dma_period(struct fb_var_screeninfo *var) | |
224 | { | |
225 | /* | |
226 | * Period = pixclock * bits_per_byte * bytes_per_transfer | |
227 | * / memory_bits_per_pixel; | |
228 | */ | |
229 | return var->pixclock * 8 * 16 / var->bits_per_pixel; | |
230 | } | |
231 | ||
232 | extern unsigned int get_clk_frequency_khz(int info); | |
233 | #endif | |
234 | ||
d14b272b RP |
235 | /* |
236 | * Select the smallest mode that allows the desired resolution to be | |
237 | * displayed. If desired parameters can be rounded up. | |
238 | */ | |
239 | static struct pxafb_mode_info *pxafb_getmode(struct pxafb_mach_info *mach, struct fb_var_screeninfo *var) | |
240 | { | |
241 | struct pxafb_mode_info *mode = NULL; | |
242 | struct pxafb_mode_info *modelist = mach->modes; | |
243 | unsigned int best_x = 0xffffffff, best_y = 0xffffffff; | |
244 | unsigned int i; | |
245 | ||
246 | for (i = 0 ; i < mach->num_modes ; i++) { | |
247 | if (modelist[i].xres >= var->xres && modelist[i].yres >= var->yres && | |
248 | modelist[i].xres < best_x && modelist[i].yres < best_y && | |
249 | modelist[i].bpp >= var->bits_per_pixel ) { | |
250 | best_x = modelist[i].xres; | |
251 | best_y = modelist[i].yres; | |
252 | mode = &modelist[i]; | |
253 | } | |
254 | } | |
255 | ||
256 | return mode; | |
257 | } | |
258 | ||
259 | static void pxafb_setmode(struct fb_var_screeninfo *var, struct pxafb_mode_info *mode) | |
260 | { | |
261 | var->xres = mode->xres; | |
262 | var->yres = mode->yres; | |
263 | var->bits_per_pixel = mode->bpp; | |
264 | var->pixclock = mode->pixclock; | |
265 | var->hsync_len = mode->hsync_len; | |
266 | var->left_margin = mode->left_margin; | |
267 | var->right_margin = mode->right_margin; | |
268 | var->vsync_len = mode->vsync_len; | |
269 | var->upper_margin = mode->upper_margin; | |
270 | var->lower_margin = mode->lower_margin; | |
271 | var->sync = mode->sync; | |
272 | var->grayscale = mode->cmap_greyscale; | |
273 | var->xres_virtual = var->xres; | |
274 | var->yres_virtual = var->yres; | |
275 | } | |
276 | ||
1da177e4 LT |
277 | /* |
278 | * pxafb_check_var(): | |
279 | * Get the video params out of 'var'. If a value doesn't fit, round it up, | |
280 | * if it's too big, return -EINVAL. | |
281 | * | |
282 | * Round up in the following order: bits_per_pixel, xres, | |
283 | * yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale, | |
284 | * bitfields, horizontal timing, vertical timing. | |
285 | */ | |
286 | static int pxafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
287 | { | |
288 | struct pxafb_info *fbi = (struct pxafb_info *)info; | |
d14b272b | 289 | struct pxafb_mach_info *inf = fbi->dev->platform_data; |
1da177e4 LT |
290 | |
291 | if (var->xres < MIN_XRES) | |
292 | var->xres = MIN_XRES; | |
293 | if (var->yres < MIN_YRES) | |
294 | var->yres = MIN_YRES; | |
d14b272b RP |
295 | |
296 | if (inf->fixed_modes) { | |
297 | struct pxafb_mode_info *mode; | |
298 | ||
299 | mode = pxafb_getmode(inf, var); | |
300 | if (!mode) | |
301 | return -EINVAL; | |
302 | pxafb_setmode(var, mode); | |
303 | } else { | |
304 | if (var->xres > inf->modes->xres) | |
305 | return -EINVAL; | |
306 | if (var->yres > inf->modes->yres) | |
307 | return -EINVAL; | |
308 | if (var->bits_per_pixel > inf->modes->bpp) | |
309 | return -EINVAL; | |
310 | } | |
311 | ||
1da177e4 LT |
312 | var->xres_virtual = |
313 | max(var->xres_virtual, var->xres); | |
314 | var->yres_virtual = | |
315 | max(var->yres_virtual, var->yres); | |
316 | ||
317 | /* | |
318 | * Setup the RGB parameters for this display. | |
319 | * | |
320 | * The pixel packing format is described on page 7-11 of the | |
321 | * PXA2XX Developer's Manual. | |
322 | */ | |
323 | if (var->bits_per_pixel == 16) { | |
324 | var->red.offset = 11; var->red.length = 5; | |
325 | var->green.offset = 5; var->green.length = 6; | |
326 | var->blue.offset = 0; var->blue.length = 5; | |
327 | var->transp.offset = var->transp.length = 0; | |
328 | } else { | |
329 | var->red.offset = var->green.offset = var->blue.offset = var->transp.offset = 0; | |
330 | var->red.length = 8; | |
331 | var->green.length = 8; | |
332 | var->blue.length = 8; | |
333 | var->transp.length = 0; | |
334 | } | |
335 | ||
336 | #ifdef CONFIG_CPU_FREQ | |
ca5da710 RK |
337 | pr_debug("pxafb: dma period = %d ps, clock = %d kHz\n", |
338 | pxafb_display_dma_period(var), | |
339 | get_clk_frequency_khz(0)); | |
1da177e4 LT |
340 | #endif |
341 | ||
342 | return 0; | |
343 | } | |
344 | ||
345 | static inline void pxafb_set_truecolor(u_int is_true_color) | |
346 | { | |
ca5da710 | 347 | pr_debug("pxafb: true_color = %d\n", is_true_color); |
1da177e4 LT |
348 | // do your machine-specific setup if needed |
349 | } | |
350 | ||
351 | /* | |
352 | * pxafb_set_par(): | |
353 | * Set the user defined part of the display for the specified console | |
354 | */ | |
355 | static int pxafb_set_par(struct fb_info *info) | |
356 | { | |
357 | struct pxafb_info *fbi = (struct pxafb_info *)info; | |
358 | struct fb_var_screeninfo *var = &info->var; | |
359 | unsigned long palette_mem_size; | |
360 | ||
ca5da710 | 361 | pr_debug("pxafb: set_par\n"); |
1da177e4 LT |
362 | |
363 | if (var->bits_per_pixel == 16) | |
364 | fbi->fb.fix.visual = FB_VISUAL_TRUECOLOR; | |
365 | else if (!fbi->cmap_static) | |
366 | fbi->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR; | |
367 | else { | |
368 | /* | |
369 | * Some people have weird ideas about wanting static | |
370 | * pseudocolor maps. I suspect their user space | |
371 | * applications are broken. | |
372 | */ | |
373 | fbi->fb.fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR; | |
374 | } | |
375 | ||
376 | fbi->fb.fix.line_length = var->xres_virtual * | |
377 | var->bits_per_pixel / 8; | |
378 | if (var->bits_per_pixel == 16) | |
379 | fbi->palette_size = 0; | |
380 | else | |
381 | fbi->palette_size = var->bits_per_pixel == 1 ? 4 : 1 << var->bits_per_pixel; | |
382 | ||
9ffa7396 HK |
383 | if ((fbi->lccr4 & LCCR4_PAL_FOR_MASK) == LCCR4_PAL_FOR_0) |
384 | palette_mem_size = fbi->palette_size * sizeof(u16); | |
385 | else | |
386 | palette_mem_size = fbi->palette_size * sizeof(u32); | |
1da177e4 | 387 | |
ca5da710 | 388 | pr_debug("pxafb: palette_mem_size = 0x%08lx\n", palette_mem_size); |
1da177e4 LT |
389 | |
390 | fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size); | |
391 | fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size; | |
392 | ||
393 | /* | |
394 | * Set (any) board control register to handle new color depth | |
395 | */ | |
396 | pxafb_set_truecolor(fbi->fb.fix.visual == FB_VISUAL_TRUECOLOR); | |
397 | ||
398 | if (fbi->fb.var.bits_per_pixel == 16) | |
399 | fb_dealloc_cmap(&fbi->fb.cmap); | |
400 | else | |
401 | fb_alloc_cmap(&fbi->fb.cmap, 1<<fbi->fb.var.bits_per_pixel, 0); | |
402 | ||
403 | pxafb_activate_var(var, fbi); | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
408 | /* | |
409 | * Formal definition of the VESA spec: | |
410 | * On | |
411 | * This refers to the state of the display when it is in full operation | |
412 | * Stand-By | |
413 | * This defines an optional operating state of minimal power reduction with | |
414 | * the shortest recovery time | |
415 | * Suspend | |
416 | * This refers to a level of power management in which substantial power | |
417 | * reduction is achieved by the display. The display can have a longer | |
418 | * recovery time from this state than from the Stand-by state | |
419 | * Off | |
420 | * This indicates that the display is consuming the lowest level of power | |
421 | * and is non-operational. Recovery from this state may optionally require | |
422 | * the user to manually power on the monitor | |
423 | * | |
424 | * Now, the fbdev driver adds an additional state, (blank), where they | |
425 | * turn off the video (maybe by colormap tricks), but don't mess with the | |
426 | * video itself: think of it semantically between on and Stand-By. | |
427 | * | |
428 | * So here's what we should do in our fbdev blank routine: | |
429 | * | |
430 | * VESA_NO_BLANKING (mode 0) Video on, front/back light on | |
431 | * VESA_VSYNC_SUSPEND (mode 1) Video on, front/back light off | |
432 | * VESA_HSYNC_SUSPEND (mode 2) Video on, front/back light off | |
433 | * VESA_POWERDOWN (mode 3) Video off, front/back light off | |
434 | * | |
435 | * This will match the matrox implementation. | |
436 | */ | |
437 | ||
438 | /* | |
439 | * pxafb_blank(): | |
440 | * Blank the display by setting all palette values to zero. Note, the | |
441 | * 16 bpp mode does not really use the palette, so this will not | |
442 | * blank the display in all modes. | |
443 | */ | |
444 | static int pxafb_blank(int blank, struct fb_info *info) | |
445 | { | |
446 | struct pxafb_info *fbi = (struct pxafb_info *)info; | |
447 | int i; | |
448 | ||
ca5da710 | 449 | pr_debug("pxafb: blank=%d\n", blank); |
1da177e4 LT |
450 | |
451 | switch (blank) { | |
452 | case FB_BLANK_POWERDOWN: | |
453 | case FB_BLANK_VSYNC_SUSPEND: | |
454 | case FB_BLANK_HSYNC_SUSPEND: | |
455 | case FB_BLANK_NORMAL: | |
456 | if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR || | |
457 | fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR) | |
458 | for (i = 0; i < fbi->palette_size; i++) | |
459 | pxafb_setpalettereg(i, 0, 0, 0, 0, info); | |
460 | ||
461 | pxafb_schedule_work(fbi, C_DISABLE); | |
462 | //TODO if (pxafb_blank_helper) pxafb_blank_helper(blank); | |
463 | break; | |
464 | ||
465 | case FB_BLANK_UNBLANK: | |
466 | //TODO if (pxafb_blank_helper) pxafb_blank_helper(blank); | |
467 | if (fbi->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR || | |
468 | fbi->fb.fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR) | |
469 | fb_set_cmap(&fbi->fb.cmap, info); | |
470 | pxafb_schedule_work(fbi, C_ENABLE); | |
471 | } | |
472 | return 0; | |
473 | } | |
474 | ||
216d526c | 475 | static int pxafb_mmap(struct fb_info *info, |
1da177e4 LT |
476 | struct vm_area_struct *vma) |
477 | { | |
478 | struct pxafb_info *fbi = (struct pxafb_info *)info; | |
479 | unsigned long off = vma->vm_pgoff << PAGE_SHIFT; | |
480 | ||
481 | if (off < info->fix.smem_len) { | |
482 | vma->vm_pgoff += 1; | |
483 | return dma_mmap_writecombine(fbi->dev, vma, fbi->map_cpu, | |
484 | fbi->map_dma, fbi->map_size); | |
485 | } | |
486 | return -EINVAL; | |
487 | } | |
488 | ||
489 | static struct fb_ops pxafb_ops = { | |
490 | .owner = THIS_MODULE, | |
491 | .fb_check_var = pxafb_check_var, | |
492 | .fb_set_par = pxafb_set_par, | |
493 | .fb_setcolreg = pxafb_setcolreg, | |
494 | .fb_fillrect = cfb_fillrect, | |
495 | .fb_copyarea = cfb_copyarea, | |
496 | .fb_imageblit = cfb_imageblit, | |
497 | .fb_blank = pxafb_blank, | |
1da177e4 LT |
498 | .fb_mmap = pxafb_mmap, |
499 | }; | |
500 | ||
501 | /* | |
502 | * Calculate the PCD value from the clock rate (in picoseconds). | |
503 | * We take account of the PPCR clock setting. | |
504 | * From PXA Developer's Manual: | |
505 | * | |
506 | * PixelClock = LCLK | |
507 | * ------------- | |
508 | * 2 ( PCD + 1 ) | |
509 | * | |
510 | * PCD = LCLK | |
511 | * ------------- - 1 | |
512 | * 2(PixelClock) | |
513 | * | |
514 | * Where: | |
515 | * LCLK = LCD/Memory Clock | |
516 | * PCD = LCCR3[7:0] | |
517 | * | |
518 | * PixelClock here is in Hz while the pixclock argument given is the | |
519 | * period in picoseconds. Hence PixelClock = 1 / ( pixclock * 10^-12 ) | |
520 | * | |
521 | * The function get_lclk_frequency_10khz returns LCLK in units of | |
522 | * 10khz. Calling the result of this function lclk gives us the | |
523 | * following | |
524 | * | |
525 | * PCD = (lclk * 10^4 ) * ( pixclock * 10^-12 ) | |
526 | * -------------------------------------- - 1 | |
527 | * 2 | |
528 | * | |
529 | * Factoring the 10^4 and 10^-12 out gives 10^-8 == 1 / 100000000 as used below. | |
530 | */ | |
72e3524c | 531 | static inline unsigned int get_pcd(struct pxafb_info *fbi, unsigned int pixclock) |
1da177e4 LT |
532 | { |
533 | unsigned long long pcd; | |
534 | ||
535 | /* FIXME: Need to take into account Double Pixel Clock mode | |
72e3524c RK |
536 | * (DPC) bit? or perhaps set it based on the various clock |
537 | * speeds */ | |
538 | pcd = (unsigned long long)(clk_get_rate(fbi->clk) / 10000); | |
539 | pcd *= pixclock; | |
bf1b8ab6 | 540 | do_div(pcd, 100000000 * 2); |
1da177e4 LT |
541 | /* no need for this, since we should subtract 1 anyway. they cancel */ |
542 | /* pcd += 1; */ /* make up for integer math truncations */ | |
543 | return (unsigned int)pcd; | |
544 | } | |
545 | ||
ba44cd2d RP |
546 | /* |
547 | * Some touchscreens need hsync information from the video driver to | |
72e3524c RK |
548 | * function correctly. We export it here. Note that 'hsync_time' and |
549 | * the value returned from pxafb_get_hsync_time() is the *reciprocal* | |
550 | * of the hsync period in seconds. | |
ba44cd2d RP |
551 | */ |
552 | static inline void set_hsync_time(struct pxafb_info *fbi, unsigned int pcd) | |
553 | { | |
72e3524c | 554 | unsigned long htime; |
ba44cd2d RP |
555 | |
556 | if ((pcd == 0) || (fbi->fb.var.hsync_len == 0)) { | |
557 | fbi->hsync_time=0; | |
558 | return; | |
559 | } | |
560 | ||
72e3524c RK |
561 | htime = clk_get_rate(fbi->clk) / (pcd * fbi->fb.var.hsync_len); |
562 | ||
ba44cd2d RP |
563 | fbi->hsync_time = htime; |
564 | } | |
565 | ||
566 | unsigned long pxafb_get_hsync_time(struct device *dev) | |
567 | { | |
568 | struct pxafb_info *fbi = dev_get_drvdata(dev); | |
569 | ||
570 | /* If display is blanked/suspended, hsync isn't active */ | |
571 | if (!fbi || (fbi->state != C_ENABLE)) | |
572 | return 0; | |
573 | ||
574 | return fbi->hsync_time; | |
575 | } | |
576 | EXPORT_SYMBOL(pxafb_get_hsync_time); | |
577 | ||
1da177e4 LT |
578 | /* |
579 | * pxafb_activate_var(): | |
580 | * Configures LCD Controller based on entries in var parameter. Settings are | |
581 | * only written to the controller if changes were made. | |
582 | */ | |
583 | static int pxafb_activate_var(struct fb_var_screeninfo *var, struct pxafb_info *fbi) | |
584 | { | |
585 | struct pxafb_lcd_reg new_regs; | |
586 | u_long flags; | |
72e3524c | 587 | u_int lines_per_panel, pcd = get_pcd(fbi, var->pixclock); |
1da177e4 | 588 | |
ca5da710 | 589 | pr_debug("pxafb: Configuring PXA LCD\n"); |
1da177e4 | 590 | |
ca5da710 RK |
591 | pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n", |
592 | var->xres, var->hsync_len, | |
593 | var->left_margin, var->right_margin); | |
594 | pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n", | |
595 | var->yres, var->vsync_len, | |
596 | var->upper_margin, var->lower_margin); | |
597 | pr_debug("var: pixclock=%d pcd=%d\n", var->pixclock, pcd); | |
1da177e4 LT |
598 | |
599 | #if DEBUG_VAR | |
600 | if (var->xres < 16 || var->xres > 1024) | |
601 | printk(KERN_ERR "%s: invalid xres %d\n", | |
602 | fbi->fb.fix.id, var->xres); | |
603 | switch(var->bits_per_pixel) { | |
604 | case 1: | |
605 | case 2: | |
606 | case 4: | |
607 | case 8: | |
608 | case 16: | |
609 | break; | |
610 | default: | |
611 | printk(KERN_ERR "%s: invalid bit depth %d\n", | |
612 | fbi->fb.fix.id, var->bits_per_pixel); | |
613 | break; | |
614 | } | |
615 | if (var->hsync_len < 1 || var->hsync_len > 64) | |
616 | printk(KERN_ERR "%s: invalid hsync_len %d\n", | |
617 | fbi->fb.fix.id, var->hsync_len); | |
618 | if (var->left_margin < 1 || var->left_margin > 255) | |
619 | printk(KERN_ERR "%s: invalid left_margin %d\n", | |
620 | fbi->fb.fix.id, var->left_margin); | |
621 | if (var->right_margin < 1 || var->right_margin > 255) | |
622 | printk(KERN_ERR "%s: invalid right_margin %d\n", | |
623 | fbi->fb.fix.id, var->right_margin); | |
624 | if (var->yres < 1 || var->yres > 1024) | |
625 | printk(KERN_ERR "%s: invalid yres %d\n", | |
626 | fbi->fb.fix.id, var->yres); | |
627 | if (var->vsync_len < 1 || var->vsync_len > 64) | |
628 | printk(KERN_ERR "%s: invalid vsync_len %d\n", | |
629 | fbi->fb.fix.id, var->vsync_len); | |
630 | if (var->upper_margin < 0 || var->upper_margin > 255) | |
631 | printk(KERN_ERR "%s: invalid upper_margin %d\n", | |
632 | fbi->fb.fix.id, var->upper_margin); | |
633 | if (var->lower_margin < 0 || var->lower_margin > 255) | |
634 | printk(KERN_ERR "%s: invalid lower_margin %d\n", | |
635 | fbi->fb.fix.id, var->lower_margin); | |
636 | #endif | |
637 | ||
638 | new_regs.lccr0 = fbi->lccr0 | | |
639 | (LCCR0_LDM | LCCR0_SFM | LCCR0_IUM | LCCR0_EFM | | |
640 | LCCR0_QDM | LCCR0_BM | LCCR0_OUM); | |
641 | ||
642 | new_regs.lccr1 = | |
643 | LCCR1_DisWdth(var->xres) + | |
644 | LCCR1_HorSnchWdth(var->hsync_len) + | |
645 | LCCR1_BegLnDel(var->left_margin) + | |
646 | LCCR1_EndLnDel(var->right_margin); | |
647 | ||
648 | /* | |
649 | * If we have a dual scan LCD, we need to halve | |
650 | * the YRES parameter. | |
651 | */ | |
652 | lines_per_panel = var->yres; | |
653 | if ((fbi->lccr0 & LCCR0_SDS) == LCCR0_Dual) | |
654 | lines_per_panel /= 2; | |
655 | ||
656 | new_regs.lccr2 = | |
657 | LCCR2_DisHght(lines_per_panel) + | |
658 | LCCR2_VrtSnchWdth(var->vsync_len) + | |
659 | LCCR2_BegFrmDel(var->upper_margin) + | |
660 | LCCR2_EndFrmDel(var->lower_margin); | |
661 | ||
662 | new_regs.lccr3 = fbi->lccr3 | | |
663 | pxafb_bpp_to_lccr3(var) | | |
664 | (var->sync & FB_SYNC_HOR_HIGH_ACT ? LCCR3_HorSnchH : LCCR3_HorSnchL) | | |
665 | (var->sync & FB_SYNC_VERT_HIGH_ACT ? LCCR3_VrtSnchH : LCCR3_VrtSnchL); | |
666 | ||
667 | if (pcd) | |
668 | new_regs.lccr3 |= LCCR3_PixClkDiv(pcd); | |
669 | ||
ca5da710 RK |
670 | pr_debug("nlccr0 = 0x%08x\n", new_regs.lccr0); |
671 | pr_debug("nlccr1 = 0x%08x\n", new_regs.lccr1); | |
672 | pr_debug("nlccr2 = 0x%08x\n", new_regs.lccr2); | |
673 | pr_debug("nlccr3 = 0x%08x\n", new_regs.lccr3); | |
1da177e4 LT |
674 | |
675 | /* Update shadow copy atomically */ | |
676 | local_irq_save(flags); | |
677 | ||
678 | /* setup dma descriptors */ | |
679 | fbi->dmadesc_fblow_cpu = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette_cpu - 3*16); | |
680 | fbi->dmadesc_fbhigh_cpu = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette_cpu - 2*16); | |
681 | fbi->dmadesc_palette_cpu = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette_cpu - 1*16); | |
682 | ||
683 | fbi->dmadesc_fblow_dma = fbi->palette_dma - 3*16; | |
684 | fbi->dmadesc_fbhigh_dma = fbi->palette_dma - 2*16; | |
685 | fbi->dmadesc_palette_dma = fbi->palette_dma - 1*16; | |
686 | ||
687 | #define BYTES_PER_PANEL (lines_per_panel * fbi->fb.fix.line_length) | |
688 | ||
689 | /* populate descriptors */ | |
690 | fbi->dmadesc_fblow_cpu->fdadr = fbi->dmadesc_fblow_dma; | |
691 | fbi->dmadesc_fblow_cpu->fsadr = fbi->screen_dma + BYTES_PER_PANEL; | |
692 | fbi->dmadesc_fblow_cpu->fidr = 0; | |
693 | fbi->dmadesc_fblow_cpu->ldcmd = BYTES_PER_PANEL; | |
694 | ||
695 | fbi->fdadr1 = fbi->dmadesc_fblow_dma; /* only used in dual-panel mode */ | |
696 | ||
697 | fbi->dmadesc_fbhigh_cpu->fsadr = fbi->screen_dma; | |
698 | fbi->dmadesc_fbhigh_cpu->fidr = 0; | |
699 | fbi->dmadesc_fbhigh_cpu->ldcmd = BYTES_PER_PANEL; | |
700 | ||
701 | fbi->dmadesc_palette_cpu->fsadr = fbi->palette_dma; | |
702 | fbi->dmadesc_palette_cpu->fidr = 0; | |
9ffa7396 HK |
703 | if ((fbi->lccr4 & LCCR4_PAL_FOR_MASK) == LCCR4_PAL_FOR_0) |
704 | fbi->dmadesc_palette_cpu->ldcmd = fbi->palette_size * | |
705 | sizeof(u16); | |
706 | else | |
707 | fbi->dmadesc_palette_cpu->ldcmd = fbi->palette_size * | |
708 | sizeof(u32); | |
709 | fbi->dmadesc_palette_cpu->ldcmd |= LDCMD_PAL; | |
1da177e4 LT |
710 | |
711 | if (var->bits_per_pixel == 16) { | |
712 | /* palette shouldn't be loaded in true-color mode */ | |
713 | fbi->dmadesc_fbhigh_cpu->fdadr = fbi->dmadesc_fbhigh_dma; | |
714 | fbi->fdadr0 = fbi->dmadesc_fbhigh_dma; /* no pal just fbhigh */ | |
715 | /* init it to something, even though we won't be using it */ | |
716 | fbi->dmadesc_palette_cpu->fdadr = fbi->dmadesc_palette_dma; | |
717 | } else { | |
718 | fbi->dmadesc_palette_cpu->fdadr = fbi->dmadesc_fbhigh_dma; | |
719 | fbi->dmadesc_fbhigh_cpu->fdadr = fbi->dmadesc_palette_dma; | |
720 | fbi->fdadr0 = fbi->dmadesc_palette_dma; /* flips back and forth between pal and fbhigh */ | |
721 | } | |
722 | ||
723 | #if 0 | |
ca5da710 RK |
724 | pr_debug("fbi->dmadesc_fblow_cpu = 0x%p\n", fbi->dmadesc_fblow_cpu); |
725 | pr_debug("fbi->dmadesc_fbhigh_cpu = 0x%p\n", fbi->dmadesc_fbhigh_cpu); | |
726 | pr_debug("fbi->dmadesc_palette_cpu = 0x%p\n", fbi->dmadesc_palette_cpu); | |
727 | pr_debug("fbi->dmadesc_fblow_dma = 0x%x\n", fbi->dmadesc_fblow_dma); | |
728 | pr_debug("fbi->dmadesc_fbhigh_dma = 0x%x\n", fbi->dmadesc_fbhigh_dma); | |
729 | pr_debug("fbi->dmadesc_palette_dma = 0x%x\n", fbi->dmadesc_palette_dma); | |
730 | ||
731 | pr_debug("fbi->dmadesc_fblow_cpu->fdadr = 0x%x\n", fbi->dmadesc_fblow_cpu->fdadr); | |
732 | pr_debug("fbi->dmadesc_fbhigh_cpu->fdadr = 0x%x\n", fbi->dmadesc_fbhigh_cpu->fdadr); | |
733 | pr_debug("fbi->dmadesc_palette_cpu->fdadr = 0x%x\n", fbi->dmadesc_palette_cpu->fdadr); | |
734 | ||
735 | pr_debug("fbi->dmadesc_fblow_cpu->fsadr = 0x%x\n", fbi->dmadesc_fblow_cpu->fsadr); | |
736 | pr_debug("fbi->dmadesc_fbhigh_cpu->fsadr = 0x%x\n", fbi->dmadesc_fbhigh_cpu->fsadr); | |
737 | pr_debug("fbi->dmadesc_palette_cpu->fsadr = 0x%x\n", fbi->dmadesc_palette_cpu->fsadr); | |
738 | ||
739 | pr_debug("fbi->dmadesc_fblow_cpu->ldcmd = 0x%x\n", fbi->dmadesc_fblow_cpu->ldcmd); | |
740 | pr_debug("fbi->dmadesc_fbhigh_cpu->ldcmd = 0x%x\n", fbi->dmadesc_fbhigh_cpu->ldcmd); | |
741 | pr_debug("fbi->dmadesc_palette_cpu->ldcmd = 0x%x\n", fbi->dmadesc_palette_cpu->ldcmd); | |
1da177e4 LT |
742 | #endif |
743 | ||
744 | fbi->reg_lccr0 = new_regs.lccr0; | |
745 | fbi->reg_lccr1 = new_regs.lccr1; | |
746 | fbi->reg_lccr2 = new_regs.lccr2; | |
747 | fbi->reg_lccr3 = new_regs.lccr3; | |
9ffa7396 HK |
748 | fbi->reg_lccr4 = LCCR4 & (~LCCR4_PAL_FOR_MASK); |
749 | fbi->reg_lccr4 |= (fbi->lccr4 & LCCR4_PAL_FOR_MASK); | |
ba44cd2d | 750 | set_hsync_time(fbi, pcd); |
1da177e4 LT |
751 | local_irq_restore(flags); |
752 | ||
753 | /* | |
754 | * Only update the registers if the controller is enabled | |
755 | * and something has changed. | |
756 | */ | |
757 | if ((LCCR0 != fbi->reg_lccr0) || (LCCR1 != fbi->reg_lccr1) || | |
758 | (LCCR2 != fbi->reg_lccr2) || (LCCR3 != fbi->reg_lccr3) || | |
759 | (FDADR0 != fbi->fdadr0) || (FDADR1 != fbi->fdadr1)) | |
760 | pxafb_schedule_work(fbi, C_REENABLE); | |
761 | ||
762 | return 0; | |
763 | } | |
764 | ||
765 | /* | |
766 | * NOTE! The following functions are purely helpers for set_ctrlr_state. | |
767 | * Do not call them directly; set_ctrlr_state does the correct serialisation | |
768 | * to ensure that things happen in the right way 100% of time time. | |
769 | * -- rmk | |
770 | */ | |
771 | static inline void __pxafb_backlight_power(struct pxafb_info *fbi, int on) | |
772 | { | |
ca5da710 | 773 | pr_debug("pxafb: backlight o%s\n", on ? "n" : "ff"); |
1da177e4 LT |
774 | |
775 | if (pxafb_backlight_power) | |
776 | pxafb_backlight_power(on); | |
777 | } | |
778 | ||
779 | static inline void __pxafb_lcd_power(struct pxafb_info *fbi, int on) | |
780 | { | |
ca5da710 | 781 | pr_debug("pxafb: LCD power o%s\n", on ? "n" : "ff"); |
1da177e4 LT |
782 | |
783 | if (pxafb_lcd_power) | |
d14b272b | 784 | pxafb_lcd_power(on, &fbi->fb.var); |
1da177e4 LT |
785 | } |
786 | ||
787 | static void pxafb_setup_gpio(struct pxafb_info *fbi) | |
788 | { | |
789 | int gpio, ldd_bits; | |
790 | unsigned int lccr0 = fbi->lccr0; | |
791 | ||
792 | /* | |
793 | * setup is based on type of panel supported | |
794 | */ | |
795 | ||
796 | /* 4 bit interface */ | |
797 | if ((lccr0 & LCCR0_CMS) == LCCR0_Mono && | |
798 | (lccr0 & LCCR0_SDS) == LCCR0_Sngl && | |
799 | (lccr0 & LCCR0_DPD) == LCCR0_4PixMono) | |
800 | ldd_bits = 4; | |
801 | ||
802 | /* 8 bit interface */ | |
803 | else if (((lccr0 & LCCR0_CMS) == LCCR0_Mono && | |
804 | ((lccr0 & LCCR0_SDS) == LCCR0_Dual || (lccr0 & LCCR0_DPD) == LCCR0_8PixMono)) || | |
805 | ((lccr0 & LCCR0_CMS) == LCCR0_Color && | |
806 | (lccr0 & LCCR0_PAS) == LCCR0_Pas && (lccr0 & LCCR0_SDS) == LCCR0_Sngl)) | |
807 | ldd_bits = 8; | |
808 | ||
809 | /* 16 bit interface */ | |
810 | else if ((lccr0 & LCCR0_CMS) == LCCR0_Color && | |
811 | ((lccr0 & LCCR0_SDS) == LCCR0_Dual || (lccr0 & LCCR0_PAS) == LCCR0_Act)) | |
812 | ldd_bits = 16; | |
813 | ||
814 | else { | |
815 | printk(KERN_ERR "pxafb_setup_gpio: unable to determine bits per pixel\n"); | |
816 | return; | |
817 | } | |
818 | ||
819 | for (gpio = 58; ldd_bits; gpio++, ldd_bits--) | |
820 | pxa_gpio_mode(gpio | GPIO_ALT_FN_2_OUT); | |
821 | pxa_gpio_mode(GPIO74_LCD_FCLK_MD); | |
822 | pxa_gpio_mode(GPIO75_LCD_LCLK_MD); | |
823 | pxa_gpio_mode(GPIO76_LCD_PCLK_MD); | |
824 | pxa_gpio_mode(GPIO77_LCD_ACBIAS_MD); | |
825 | } | |
826 | ||
827 | static void pxafb_enable_controller(struct pxafb_info *fbi) | |
828 | { | |
ca5da710 RK |
829 | pr_debug("pxafb: Enabling LCD controller\n"); |
830 | pr_debug("fdadr0 0x%08x\n", (unsigned int) fbi->fdadr0); | |
831 | pr_debug("fdadr1 0x%08x\n", (unsigned int) fbi->fdadr1); | |
832 | pr_debug("reg_lccr0 0x%08x\n", (unsigned int) fbi->reg_lccr0); | |
833 | pr_debug("reg_lccr1 0x%08x\n", (unsigned int) fbi->reg_lccr1); | |
834 | pr_debug("reg_lccr2 0x%08x\n", (unsigned int) fbi->reg_lccr2); | |
835 | pr_debug("reg_lccr3 0x%08x\n", (unsigned int) fbi->reg_lccr3); | |
1da177e4 | 836 | |
8d372266 | 837 | /* enable LCD controller clock */ |
72e3524c | 838 | clk_enable(fbi->clk); |
8d372266 | 839 | |
1da177e4 LT |
840 | /* Sequence from 11.7.10 */ |
841 | LCCR3 = fbi->reg_lccr3; | |
842 | LCCR2 = fbi->reg_lccr2; | |
843 | LCCR1 = fbi->reg_lccr1; | |
844 | LCCR0 = fbi->reg_lccr0 & ~LCCR0_ENB; | |
845 | ||
846 | FDADR0 = fbi->fdadr0; | |
847 | FDADR1 = fbi->fdadr1; | |
848 | LCCR0 |= LCCR0_ENB; | |
849 | ||
ca5da710 RK |
850 | pr_debug("FDADR0 0x%08x\n", (unsigned int) FDADR0); |
851 | pr_debug("FDADR1 0x%08x\n", (unsigned int) FDADR1); | |
852 | pr_debug("LCCR0 0x%08x\n", (unsigned int) LCCR0); | |
853 | pr_debug("LCCR1 0x%08x\n", (unsigned int) LCCR1); | |
854 | pr_debug("LCCR2 0x%08x\n", (unsigned int) LCCR2); | |
855 | pr_debug("LCCR3 0x%08x\n", (unsigned int) LCCR3); | |
9ffa7396 | 856 | pr_debug("LCCR4 0x%08x\n", (unsigned int) LCCR4); |
1da177e4 LT |
857 | } |
858 | ||
859 | static void pxafb_disable_controller(struct pxafb_info *fbi) | |
860 | { | |
861 | DECLARE_WAITQUEUE(wait, current); | |
862 | ||
ca5da710 | 863 | pr_debug("pxafb: disabling LCD controller\n"); |
1da177e4 LT |
864 | |
865 | set_current_state(TASK_UNINTERRUPTIBLE); | |
866 | add_wait_queue(&fbi->ctrlr_wait, &wait); | |
867 | ||
868 | LCSR = 0xffffffff; /* Clear LCD Status Register */ | |
869 | LCCR0 &= ~LCCR0_LDM; /* Enable LCD Disable Done Interrupt */ | |
870 | LCCR0 |= LCCR0_DIS; /* Disable LCD Controller */ | |
871 | ||
2cbbb3b5 | 872 | schedule_timeout(200 * HZ / 1000); |
1da177e4 | 873 | remove_wait_queue(&fbi->ctrlr_wait, &wait); |
8d372266 NP |
874 | |
875 | /* disable LCD controller clock */ | |
72e3524c | 876 | clk_disable(fbi->clk); |
1da177e4 LT |
877 | } |
878 | ||
879 | /* | |
880 | * pxafb_handle_irq: Handle 'LCD DONE' interrupts. | |
881 | */ | |
7d12e780 | 882 | static irqreturn_t pxafb_handle_irq(int irq, void *dev_id) |
1da177e4 LT |
883 | { |
884 | struct pxafb_info *fbi = dev_id; | |
885 | unsigned int lcsr = LCSR; | |
886 | ||
887 | if (lcsr & LCSR_LDD) { | |
888 | LCCR0 |= LCCR0_LDM; | |
889 | wake_up(&fbi->ctrlr_wait); | |
890 | } | |
891 | ||
892 | LCSR = lcsr; | |
893 | return IRQ_HANDLED; | |
894 | } | |
895 | ||
896 | /* | |
897 | * This function must be called from task context only, since it will | |
898 | * sleep when disabling the LCD controller, or if we get two contending | |
899 | * processes trying to alter state. | |
900 | */ | |
901 | static void set_ctrlr_state(struct pxafb_info *fbi, u_int state) | |
902 | { | |
903 | u_int old_state; | |
904 | ||
905 | down(&fbi->ctrlr_sem); | |
906 | ||
907 | old_state = fbi->state; | |
908 | ||
909 | /* | |
910 | * Hack around fbcon initialisation. | |
911 | */ | |
912 | if (old_state == C_STARTUP && state == C_REENABLE) | |
913 | state = C_ENABLE; | |
914 | ||
915 | switch (state) { | |
916 | case C_DISABLE_CLKCHANGE: | |
917 | /* | |
918 | * Disable controller for clock change. If the | |
919 | * controller is already disabled, then do nothing. | |
920 | */ | |
921 | if (old_state != C_DISABLE && old_state != C_DISABLE_PM) { | |
922 | fbi->state = state; | |
923 | //TODO __pxafb_lcd_power(fbi, 0); | |
924 | pxafb_disable_controller(fbi); | |
925 | } | |
926 | break; | |
927 | ||
928 | case C_DISABLE_PM: | |
929 | case C_DISABLE: | |
930 | /* | |
931 | * Disable controller | |
932 | */ | |
933 | if (old_state != C_DISABLE) { | |
934 | fbi->state = state; | |
935 | __pxafb_backlight_power(fbi, 0); | |
936 | __pxafb_lcd_power(fbi, 0); | |
937 | if (old_state != C_DISABLE_CLKCHANGE) | |
938 | pxafb_disable_controller(fbi); | |
939 | } | |
940 | break; | |
941 | ||
942 | case C_ENABLE_CLKCHANGE: | |
943 | /* | |
944 | * Enable the controller after clock change. Only | |
945 | * do this if we were disabled for the clock change. | |
946 | */ | |
947 | if (old_state == C_DISABLE_CLKCHANGE) { | |
948 | fbi->state = C_ENABLE; | |
949 | pxafb_enable_controller(fbi); | |
950 | //TODO __pxafb_lcd_power(fbi, 1); | |
951 | } | |
952 | break; | |
953 | ||
954 | case C_REENABLE: | |
955 | /* | |
956 | * Re-enable the controller only if it was already | |
957 | * enabled. This is so we reprogram the control | |
958 | * registers. | |
959 | */ | |
960 | if (old_state == C_ENABLE) { | |
d14b272b | 961 | __pxafb_lcd_power(fbi, 0); |
1da177e4 LT |
962 | pxafb_disable_controller(fbi); |
963 | pxafb_setup_gpio(fbi); | |
964 | pxafb_enable_controller(fbi); | |
d14b272b | 965 | __pxafb_lcd_power(fbi, 1); |
1da177e4 LT |
966 | } |
967 | break; | |
968 | ||
969 | case C_ENABLE_PM: | |
970 | /* | |
971 | * Re-enable the controller after PM. This is not | |
972 | * perfect - think about the case where we were doing | |
973 | * a clock change, and we suspended half-way through. | |
974 | */ | |
975 | if (old_state != C_DISABLE_PM) | |
976 | break; | |
977 | /* fall through */ | |
978 | ||
979 | case C_ENABLE: | |
980 | /* | |
981 | * Power up the LCD screen, enable controller, and | |
982 | * turn on the backlight. | |
983 | */ | |
984 | if (old_state != C_ENABLE) { | |
985 | fbi->state = C_ENABLE; | |
986 | pxafb_setup_gpio(fbi); | |
987 | pxafb_enable_controller(fbi); | |
988 | __pxafb_lcd_power(fbi, 1); | |
989 | __pxafb_backlight_power(fbi, 1); | |
990 | } | |
991 | break; | |
992 | } | |
993 | up(&fbi->ctrlr_sem); | |
994 | } | |
995 | ||
996 | /* | |
997 | * Our LCD controller task (which is called when we blank or unblank) | |
998 | * via keventd. | |
999 | */ | |
6d5aefb8 | 1000 | static void pxafb_task(struct work_struct *work) |
1da177e4 | 1001 | { |
6d5aefb8 DH |
1002 | struct pxafb_info *fbi = |
1003 | container_of(work, struct pxafb_info, task); | |
1da177e4 LT |
1004 | u_int state = xchg(&fbi->task_state, -1); |
1005 | ||
1006 | set_ctrlr_state(fbi, state); | |
1007 | } | |
1008 | ||
1009 | #ifdef CONFIG_CPU_FREQ | |
1010 | /* | |
1011 | * CPU clock speed change handler. We need to adjust the LCD timing | |
1012 | * parameters when the CPU clock is adjusted by the power management | |
1013 | * subsystem. | |
1014 | * | |
1015 | * TODO: Determine why f->new != 10*get_lclk_frequency_10khz() | |
1016 | */ | |
1017 | static int | |
1018 | pxafb_freq_transition(struct notifier_block *nb, unsigned long val, void *data) | |
1019 | { | |
1020 | struct pxafb_info *fbi = TO_INF(nb, freq_transition); | |
1021 | //TODO struct cpufreq_freqs *f = data; | |
1022 | u_int pcd; | |
1023 | ||
1024 | switch (val) { | |
1025 | case CPUFREQ_PRECHANGE: | |
1026 | set_ctrlr_state(fbi, C_DISABLE_CLKCHANGE); | |
1027 | break; | |
1028 | ||
1029 | case CPUFREQ_POSTCHANGE: | |
72e3524c | 1030 | pcd = get_pcd(fbi, fbi->fb.var.pixclock); |
ba44cd2d | 1031 | set_hsync_time(fbi, pcd); |
1da177e4 LT |
1032 | fbi->reg_lccr3 = (fbi->reg_lccr3 & ~0xff) | LCCR3_PixClkDiv(pcd); |
1033 | set_ctrlr_state(fbi, C_ENABLE_CLKCHANGE); | |
1034 | break; | |
1035 | } | |
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | static int | |
1040 | pxafb_freq_policy(struct notifier_block *nb, unsigned long val, void *data) | |
1041 | { | |
1042 | struct pxafb_info *fbi = TO_INF(nb, freq_policy); | |
1043 | struct fb_var_screeninfo *var = &fbi->fb.var; | |
1044 | struct cpufreq_policy *policy = data; | |
1045 | ||
1046 | switch (val) { | |
1047 | case CPUFREQ_ADJUST: | |
1048 | case CPUFREQ_INCOMPATIBLE: | |
1049 | printk(KERN_DEBUG "min dma period: %d ps, " | |
1050 | "new clock %d kHz\n", pxafb_display_dma_period(var), | |
1051 | policy->max); | |
1052 | // TODO: fill in min/max values | |
1053 | break; | |
1054 | #if 0 | |
1055 | case CPUFREQ_NOTIFY: | |
1056 | printk(KERN_ERR "%s: got CPUFREQ_NOTIFY\n", __FUNCTION__); | |
1057 | do {} while(0); | |
1058 | /* todo: panic if min/max values aren't fulfilled | |
1059 | * [can't really happen unless there's a bug in the | |
1060 | * CPU policy verification process * | |
1061 | */ | |
1062 | break; | |
1063 | #endif | |
1064 | } | |
1065 | return 0; | |
1066 | } | |
1067 | #endif | |
1068 | ||
1069 | #ifdef CONFIG_PM | |
1070 | /* | |
1071 | * Power management hooks. Note that we won't be called from IRQ context, | |
1072 | * unlike the blank functions above, so we may sleep. | |
1073 | */ | |
3ae5eaec | 1074 | static int pxafb_suspend(struct platform_device *dev, pm_message_t state) |
1da177e4 | 1075 | { |
3ae5eaec | 1076 | struct pxafb_info *fbi = platform_get_drvdata(dev); |
1da177e4 | 1077 | |
9480e307 | 1078 | set_ctrlr_state(fbi, C_DISABLE_PM); |
1da177e4 LT |
1079 | return 0; |
1080 | } | |
1081 | ||
3ae5eaec | 1082 | static int pxafb_resume(struct platform_device *dev) |
1da177e4 | 1083 | { |
3ae5eaec | 1084 | struct pxafb_info *fbi = platform_get_drvdata(dev); |
1da177e4 | 1085 | |
9480e307 | 1086 | set_ctrlr_state(fbi, C_ENABLE_PM); |
1da177e4 LT |
1087 | return 0; |
1088 | } | |
1089 | #else | |
1090 | #define pxafb_suspend NULL | |
1091 | #define pxafb_resume NULL | |
1092 | #endif | |
1093 | ||
1094 | /* | |
1095 | * pxafb_map_video_memory(): | |
1096 | * Allocates the DRAM memory for the frame buffer. This buffer is | |
1097 | * remapped into a non-cached, non-buffered, memory region to | |
1098 | * allow palette and pixel writes to occur without flushing the | |
1099 | * cache. Once this area is remapped, all virtual memory | |
1100 | * access to the video memory should occur at the new region. | |
1101 | */ | |
1102 | static int __init pxafb_map_video_memory(struct pxafb_info *fbi) | |
1103 | { | |
1104 | u_long palette_mem_size; | |
1105 | ||
1106 | /* | |
1107 | * We reserve one page for the palette, plus the size | |
1108 | * of the framebuffer. | |
1109 | */ | |
1110 | fbi->map_size = PAGE_ALIGN(fbi->fb.fix.smem_len + PAGE_SIZE); | |
1111 | fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size, | |
1112 | &fbi->map_dma, GFP_KERNEL); | |
1113 | ||
1114 | if (fbi->map_cpu) { | |
1115 | /* prevent initial garbage on screen */ | |
1116 | memset(fbi->map_cpu, 0, fbi->map_size); | |
1117 | fbi->fb.screen_base = fbi->map_cpu + PAGE_SIZE; | |
1118 | fbi->screen_dma = fbi->map_dma + PAGE_SIZE; | |
1119 | /* | |
1120 | * FIXME: this is actually the wrong thing to place in | |
1121 | * smem_start. But fbdev suffers from the problem that | |
1122 | * it needs an API which doesn't exist (in this case, | |
1123 | * dma_writecombine_mmap) | |
1124 | */ | |
1125 | fbi->fb.fix.smem_start = fbi->screen_dma; | |
1da177e4 LT |
1126 | fbi->palette_size = fbi->fb.var.bits_per_pixel == 8 ? 256 : 16; |
1127 | ||
9ffa7396 HK |
1128 | if ((fbi->lccr4 & LCCR4_PAL_FOR_MASK) == LCCR4_PAL_FOR_0) |
1129 | palette_mem_size = fbi->palette_size * sizeof(u16); | |
1130 | else | |
1131 | palette_mem_size = fbi->palette_size * sizeof(u32); | |
1132 | ||
ca5da710 | 1133 | pr_debug("pxafb: palette_mem_size = 0x%08lx\n", palette_mem_size); |
1da177e4 LT |
1134 | |
1135 | fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size); | |
1136 | fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size; | |
1137 | } | |
1138 | ||
1139 | return fbi->map_cpu ? 0 : -ENOMEM; | |
1140 | } | |
1141 | ||
1142 | static struct pxafb_info * __init pxafb_init_fbinfo(struct device *dev) | |
1143 | { | |
1144 | struct pxafb_info *fbi; | |
1145 | void *addr; | |
1146 | struct pxafb_mach_info *inf = dev->platform_data; | |
d14b272b RP |
1147 | struct pxafb_mode_info *mode = inf->modes; |
1148 | int i, smemlen; | |
1da177e4 LT |
1149 | |
1150 | /* Alloc the pxafb_info and pseudo_palette in one step */ | |
1151 | fbi = kmalloc(sizeof(struct pxafb_info) + sizeof(u32) * 16, GFP_KERNEL); | |
1152 | if (!fbi) | |
1153 | return NULL; | |
1154 | ||
1155 | memset(fbi, 0, sizeof(struct pxafb_info)); | |
1156 | fbi->dev = dev; | |
1157 | ||
72e3524c RK |
1158 | fbi->clk = clk_get(dev, "LCDCLK"); |
1159 | if (IS_ERR(fbi->clk)) { | |
1160 | kfree(fbi); | |
1161 | return NULL; | |
1162 | } | |
1163 | ||
1da177e4 LT |
1164 | strcpy(fbi->fb.fix.id, PXA_NAME); |
1165 | ||
1166 | fbi->fb.fix.type = FB_TYPE_PACKED_PIXELS; | |
1167 | fbi->fb.fix.type_aux = 0; | |
1168 | fbi->fb.fix.xpanstep = 0; | |
1169 | fbi->fb.fix.ypanstep = 0; | |
1170 | fbi->fb.fix.ywrapstep = 0; | |
1171 | fbi->fb.fix.accel = FB_ACCEL_NONE; | |
1172 | ||
1173 | fbi->fb.var.nonstd = 0; | |
1174 | fbi->fb.var.activate = FB_ACTIVATE_NOW; | |
1175 | fbi->fb.var.height = -1; | |
1176 | fbi->fb.var.width = -1; | |
1177 | fbi->fb.var.accel_flags = 0; | |
1178 | fbi->fb.var.vmode = FB_VMODE_NONINTERLACED; | |
1179 | ||
1180 | fbi->fb.fbops = &pxafb_ops; | |
1181 | fbi->fb.flags = FBINFO_DEFAULT; | |
1182 | fbi->fb.node = -1; | |
1183 | ||
1184 | addr = fbi; | |
1185 | addr = addr + sizeof(struct pxafb_info); | |
1186 | fbi->fb.pseudo_palette = addr; | |
1187 | ||
d14b272b RP |
1188 | pxafb_setmode(&fbi->fb.var, mode); |
1189 | ||
1da177e4 LT |
1190 | fbi->cmap_inverse = inf->cmap_inverse; |
1191 | fbi->cmap_static = inf->cmap_static; | |
d14b272b | 1192 | |
1da177e4 LT |
1193 | fbi->lccr0 = inf->lccr0; |
1194 | fbi->lccr3 = inf->lccr3; | |
9ffa7396 | 1195 | fbi->lccr4 = inf->lccr4; |
1da177e4 LT |
1196 | fbi->state = C_STARTUP; |
1197 | fbi->task_state = (u_char)-1; | |
d14b272b RP |
1198 | |
1199 | for (i = 0; i < inf->num_modes; i++) { | |
1200 | smemlen = mode[i].xres * mode[i].yres * mode[i].bpp / 8; | |
1201 | if (smemlen > fbi->fb.fix.smem_len) | |
1202 | fbi->fb.fix.smem_len = smemlen; | |
1203 | } | |
1da177e4 LT |
1204 | |
1205 | init_waitqueue_head(&fbi->ctrlr_wait); | |
6d5aefb8 | 1206 | INIT_WORK(&fbi->task, pxafb_task); |
1da177e4 LT |
1207 | init_MUTEX(&fbi->ctrlr_sem); |
1208 | ||
1209 | return fbi; | |
1210 | } | |
1211 | ||
1212 | #ifdef CONFIG_FB_PXA_PARAMETERS | |
1213 | static int __init pxafb_parse_options(struct device *dev, char *options) | |
1214 | { | |
1215 | struct pxafb_mach_info *inf = dev->platform_data; | |
1216 | char *this_opt; | |
1217 | ||
1218 | if (!options || !*options) | |
1219 | return 0; | |
1220 | ||
1221 | dev_dbg(dev, "options are \"%s\"\n", options ? options : "null"); | |
1222 | ||
1223 | /* could be made table driven or similar?... */ | |
1224 | while ((this_opt = strsep(&options, ",")) != NULL) { | |
1225 | if (!strncmp(this_opt, "mode:", 5)) { | |
1226 | const char *name = this_opt+5; | |
1227 | unsigned int namelen = strlen(name); | |
1228 | int res_specified = 0, bpp_specified = 0; | |
1229 | unsigned int xres = 0, yres = 0, bpp = 0; | |
1230 | int yres_specified = 0; | |
1231 | int i; | |
1232 | for (i = namelen-1; i >= 0; i--) { | |
1233 | switch (name[i]) { | |
1234 | case '-': | |
1235 | namelen = i; | |
1236 | if (!bpp_specified && !yres_specified) { | |
1237 | bpp = simple_strtoul(&name[i+1], NULL, 0); | |
1238 | bpp_specified = 1; | |
1239 | } else | |
1240 | goto done; | |
1241 | break; | |
1242 | case 'x': | |
1243 | if (!yres_specified) { | |
1244 | yres = simple_strtoul(&name[i+1], NULL, 0); | |
1245 | yres_specified = 1; | |
1246 | } else | |
1247 | goto done; | |
1248 | break; | |
88b229c7 | 1249 | case '0' ... '9': |
1da177e4 LT |
1250 | break; |
1251 | default: | |
1252 | goto done; | |
1253 | } | |
1254 | } | |
1255 | if (i < 0 && yres_specified) { | |
1256 | xres = simple_strtoul(name, NULL, 0); | |
1257 | res_specified = 1; | |
1258 | } | |
1259 | done: | |
1260 | if (res_specified) { | |
1261 | dev_info(dev, "overriding resolution: %dx%d\n", xres, yres); | |
46a34d68 | 1262 | inf->modes[0].xres = xres; inf->modes[0].yres = yres; |
1da177e4 LT |
1263 | } |
1264 | if (bpp_specified) | |
1265 | switch (bpp) { | |
1266 | case 1: | |
1267 | case 2: | |
1268 | case 4: | |
1269 | case 8: | |
1270 | case 16: | |
46a34d68 | 1271 | inf->modes[0].bpp = bpp; |
1da177e4 LT |
1272 | dev_info(dev, "overriding bit depth: %d\n", bpp); |
1273 | break; | |
1274 | default: | |
1275 | dev_err(dev, "Depth %d is not valid\n", bpp); | |
1276 | } | |
1277 | } else if (!strncmp(this_opt, "pixclock:", 9)) { | |
46a34d68 RP |
1278 | inf->modes[0].pixclock = simple_strtoul(this_opt+9, NULL, 0); |
1279 | dev_info(dev, "override pixclock: %ld\n", inf->modes[0].pixclock); | |
1da177e4 | 1280 | } else if (!strncmp(this_opt, "left:", 5)) { |
46a34d68 RP |
1281 | inf->modes[0].left_margin = simple_strtoul(this_opt+5, NULL, 0); |
1282 | dev_info(dev, "override left: %u\n", inf->modes[0].left_margin); | |
1da177e4 | 1283 | } else if (!strncmp(this_opt, "right:", 6)) { |
46a34d68 RP |
1284 | inf->modes[0].right_margin = simple_strtoul(this_opt+6, NULL, 0); |
1285 | dev_info(dev, "override right: %u\n", inf->modes[0].right_margin); | |
1da177e4 | 1286 | } else if (!strncmp(this_opt, "upper:", 6)) { |
46a34d68 RP |
1287 | inf->modes[0].upper_margin = simple_strtoul(this_opt+6, NULL, 0); |
1288 | dev_info(dev, "override upper: %u\n", inf->modes[0].upper_margin); | |
1da177e4 | 1289 | } else if (!strncmp(this_opt, "lower:", 6)) { |
46a34d68 RP |
1290 | inf->modes[0].lower_margin = simple_strtoul(this_opt+6, NULL, 0); |
1291 | dev_info(dev, "override lower: %u\n", inf->modes[0].lower_margin); | |
1da177e4 | 1292 | } else if (!strncmp(this_opt, "hsynclen:", 9)) { |
46a34d68 RP |
1293 | inf->modes[0].hsync_len = simple_strtoul(this_opt+9, NULL, 0); |
1294 | dev_info(dev, "override hsynclen: %u\n", inf->modes[0].hsync_len); | |
1da177e4 | 1295 | } else if (!strncmp(this_opt, "vsynclen:", 9)) { |
46a34d68 RP |
1296 | inf->modes[0].vsync_len = simple_strtoul(this_opt+9, NULL, 0); |
1297 | dev_info(dev, "override vsynclen: %u\n", inf->modes[0].vsync_len); | |
1da177e4 LT |
1298 | } else if (!strncmp(this_opt, "hsync:", 6)) { |
1299 | if (simple_strtoul(this_opt+6, NULL, 0) == 0) { | |
1300 | dev_info(dev, "override hsync: Active Low\n"); | |
46a34d68 | 1301 | inf->modes[0].sync &= ~FB_SYNC_HOR_HIGH_ACT; |
1da177e4 LT |
1302 | } else { |
1303 | dev_info(dev, "override hsync: Active High\n"); | |
46a34d68 | 1304 | inf->modes[0].sync |= FB_SYNC_HOR_HIGH_ACT; |
1da177e4 LT |
1305 | } |
1306 | } else if (!strncmp(this_opt, "vsync:", 6)) { | |
1307 | if (simple_strtoul(this_opt+6, NULL, 0) == 0) { | |
1308 | dev_info(dev, "override vsync: Active Low\n"); | |
46a34d68 | 1309 | inf->modes[0].sync &= ~FB_SYNC_VERT_HIGH_ACT; |
1da177e4 LT |
1310 | } else { |
1311 | dev_info(dev, "override vsync: Active High\n"); | |
46a34d68 | 1312 | inf->modes[0].sync |= FB_SYNC_VERT_HIGH_ACT; |
1da177e4 LT |
1313 | } |
1314 | } else if (!strncmp(this_opt, "dpc:", 4)) { | |
1315 | if (simple_strtoul(this_opt+4, NULL, 0) == 0) { | |
1316 | dev_info(dev, "override double pixel clock: false\n"); | |
1317 | inf->lccr3 &= ~LCCR3_DPC; | |
1318 | } else { | |
1319 | dev_info(dev, "override double pixel clock: true\n"); | |
1320 | inf->lccr3 |= LCCR3_DPC; | |
1321 | } | |
1322 | } else if (!strncmp(this_opt, "outputen:", 9)) { | |
1323 | if (simple_strtoul(this_opt+9, NULL, 0) == 0) { | |
1324 | dev_info(dev, "override output enable: active low\n"); | |
1325 | inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnL; | |
1326 | } else { | |
1327 | dev_info(dev, "override output enable: active high\n"); | |
1328 | inf->lccr3 = (inf->lccr3 & ~LCCR3_OEP) | LCCR3_OutEnH; | |
1329 | } | |
1330 | } else if (!strncmp(this_opt, "pixclockpol:", 12)) { | |
1331 | if (simple_strtoul(this_opt+12, NULL, 0) == 0) { | |
1332 | dev_info(dev, "override pixel clock polarity: falling edge\n"); | |
1333 | inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixFlEdg; | |
1334 | } else { | |
1335 | dev_info(dev, "override pixel clock polarity: rising edge\n"); | |
1336 | inf->lccr3 = (inf->lccr3 & ~LCCR3_PCP) | LCCR3_PixRsEdg; | |
1337 | } | |
1338 | } else if (!strncmp(this_opt, "color", 5)) { | |
1339 | inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Color; | |
1340 | } else if (!strncmp(this_opt, "mono", 4)) { | |
1341 | inf->lccr0 = (inf->lccr0 & ~LCCR0_CMS) | LCCR0_Mono; | |
1342 | } else if (!strncmp(this_opt, "active", 6)) { | |
1343 | inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Act; | |
1344 | } else if (!strncmp(this_opt, "passive", 7)) { | |
1345 | inf->lccr0 = (inf->lccr0 & ~LCCR0_PAS) | LCCR0_Pas; | |
1346 | } else if (!strncmp(this_opt, "single", 6)) { | |
1347 | inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Sngl; | |
1348 | } else if (!strncmp(this_opt, "dual", 4)) { | |
1349 | inf->lccr0 = (inf->lccr0 & ~LCCR0_SDS) | LCCR0_Dual; | |
1350 | } else if (!strncmp(this_opt, "4pix", 4)) { | |
1351 | inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_4PixMono; | |
1352 | } else if (!strncmp(this_opt, "8pix", 4)) { | |
1353 | inf->lccr0 = (inf->lccr0 & ~LCCR0_DPD) | LCCR0_8PixMono; | |
1354 | } else { | |
1355 | dev_err(dev, "unknown option: %s\n", this_opt); | |
1356 | return -EINVAL; | |
1357 | } | |
1358 | } | |
1359 | return 0; | |
1360 | ||
1361 | } | |
1362 | #endif | |
1363 | ||
3ae5eaec | 1364 | int __init pxafb_probe(struct platform_device *dev) |
1da177e4 LT |
1365 | { |
1366 | struct pxafb_info *fbi; | |
1367 | struct pxafb_mach_info *inf; | |
1368 | int ret; | |
1369 | ||
2cbbb3b5 | 1370 | dev_dbg(&dev->dev, "pxafb_probe\n"); |
1da177e4 | 1371 | |
3ae5eaec | 1372 | inf = dev->dev.platform_data; |
1da177e4 LT |
1373 | ret = -ENOMEM; |
1374 | fbi = NULL; | |
1375 | if (!inf) | |
1376 | goto failed; | |
1377 | ||
1378 | #ifdef CONFIG_FB_PXA_PARAMETERS | |
3ae5eaec | 1379 | ret = pxafb_parse_options(&dev->dev, g_options); |
1da177e4 LT |
1380 | if (ret < 0) |
1381 | goto failed; | |
1382 | #endif | |
1383 | ||
1384 | #ifdef DEBUG_VAR | |
1385 | /* Check for various illegal bit-combinations. Currently only | |
1386 | * a warning is given. */ | |
1387 | ||
1388 | if (inf->lccr0 & LCCR0_INVALID_CONFIG_MASK) | |
3ae5eaec | 1389 | dev_warn(&dev->dev, "machine LCCR0 setting contains illegal bits: %08x\n", |
1da177e4 LT |
1390 | inf->lccr0 & LCCR0_INVALID_CONFIG_MASK); |
1391 | if (inf->lccr3 & LCCR3_INVALID_CONFIG_MASK) | |
3ae5eaec | 1392 | dev_warn(&dev->dev, "machine LCCR3 setting contains illegal bits: %08x\n", |
1da177e4 LT |
1393 | inf->lccr3 & LCCR3_INVALID_CONFIG_MASK); |
1394 | if (inf->lccr0 & LCCR0_DPD && | |
1395 | ((inf->lccr0 & LCCR0_PAS) != LCCR0_Pas || | |
1396 | (inf->lccr0 & LCCR0_SDS) != LCCR0_Sngl || | |
1397 | (inf->lccr0 & LCCR0_CMS) != LCCR0_Mono)) | |
3ae5eaec | 1398 | dev_warn(&dev->dev, "Double Pixel Data (DPD) mode is only valid in passive mono" |
1da177e4 LT |
1399 | " single panel mode\n"); |
1400 | if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Act && | |
1401 | (inf->lccr0 & LCCR0_SDS) == LCCR0_Dual) | |
3ae5eaec | 1402 | dev_warn(&dev->dev, "Dual panel only valid in passive mode\n"); |
1da177e4 | 1403 | if ((inf->lccr0 & LCCR0_PAS) == LCCR0_Pas && |
d14b272b | 1404 | (inf->modes->upper_margin || inf->modes->lower_margin)) |
3ae5eaec | 1405 | dev_warn(&dev->dev, "Upper and lower margins must be 0 in passive mode\n"); |
1da177e4 LT |
1406 | #endif |
1407 | ||
d14b272b RP |
1408 | dev_dbg(&dev->dev, "got a %dx%dx%d LCD\n",inf->modes->xres, inf->modes->yres, inf->modes->bpp); |
1409 | if (inf->modes->xres == 0 || inf->modes->yres == 0 || inf->modes->bpp == 0) { | |
3ae5eaec | 1410 | dev_err(&dev->dev, "Invalid resolution or bit depth\n"); |
1da177e4 LT |
1411 | ret = -EINVAL; |
1412 | goto failed; | |
1413 | } | |
1414 | pxafb_backlight_power = inf->pxafb_backlight_power; | |
1415 | pxafb_lcd_power = inf->pxafb_lcd_power; | |
3ae5eaec | 1416 | fbi = pxafb_init_fbinfo(&dev->dev); |
1da177e4 | 1417 | if (!fbi) { |
3ae5eaec | 1418 | dev_err(&dev->dev, "Failed to initialize framebuffer device\n"); |
1da177e4 LT |
1419 | ret = -ENOMEM; // only reason for pxafb_init_fbinfo to fail is kmalloc |
1420 | goto failed; | |
1421 | } | |
1422 | ||
1423 | /* Initialize video memory */ | |
1424 | ret = pxafb_map_video_memory(fbi); | |
1425 | if (ret) { | |
3ae5eaec | 1426 | dev_err(&dev->dev, "Failed to allocate video RAM: %d\n", ret); |
1da177e4 LT |
1427 | ret = -ENOMEM; |
1428 | goto failed; | |
1429 | } | |
1da177e4 | 1430 | |
63a43399 | 1431 | ret = request_irq(IRQ_LCD, pxafb_handle_irq, IRQF_DISABLED, "LCD", fbi); |
1da177e4 | 1432 | if (ret) { |
3ae5eaec | 1433 | dev_err(&dev->dev, "request_irq failed: %d\n", ret); |
1da177e4 LT |
1434 | ret = -EBUSY; |
1435 | goto failed; | |
1436 | } | |
1437 | ||
1438 | /* | |
1439 | * This makes sure that our colour bitfield | |
1440 | * descriptors are correctly initialised. | |
1441 | */ | |
1442 | pxafb_check_var(&fbi->fb.var, &fbi->fb); | |
1443 | pxafb_set_par(&fbi->fb); | |
1444 | ||
3ae5eaec | 1445 | platform_set_drvdata(dev, fbi); |
1da177e4 LT |
1446 | |
1447 | ret = register_framebuffer(&fbi->fb); | |
1448 | if (ret < 0) { | |
3ae5eaec | 1449 | dev_err(&dev->dev, "Failed to register framebuffer device: %d\n", ret); |
1da177e4 LT |
1450 | goto failed; |
1451 | } | |
1452 | ||
1453 | #ifdef CONFIG_PM | |
1454 | // TODO | |
1455 | #endif | |
1456 | ||
1457 | #ifdef CONFIG_CPU_FREQ | |
1458 | fbi->freq_transition.notifier_call = pxafb_freq_transition; | |
1459 | fbi->freq_policy.notifier_call = pxafb_freq_policy; | |
1460 | cpufreq_register_notifier(&fbi->freq_transition, CPUFREQ_TRANSITION_NOTIFIER); | |
1461 | cpufreq_register_notifier(&fbi->freq_policy, CPUFREQ_POLICY_NOTIFIER); | |
1462 | #endif | |
1463 | ||
1464 | /* | |
1465 | * Ok, now enable the LCD controller | |
1466 | */ | |
1467 | set_ctrlr_state(fbi, C_ENABLE); | |
1468 | ||
1469 | return 0; | |
1470 | ||
1471 | failed: | |
3ae5eaec | 1472 | platform_set_drvdata(dev, NULL); |
1da177e4 LT |
1473 | kfree(fbi); |
1474 | return ret; | |
1475 | } | |
1476 | ||
3ae5eaec | 1477 | static struct platform_driver pxafb_driver = { |
1da177e4 LT |
1478 | .probe = pxafb_probe, |
1479 | #ifdef CONFIG_PM | |
1480 | .suspend = pxafb_suspend, | |
1481 | .resume = pxafb_resume, | |
1482 | #endif | |
3ae5eaec RK |
1483 | .driver = { |
1484 | .name = "pxa2xx-fb", | |
1485 | }, | |
1da177e4 LT |
1486 | }; |
1487 | ||
1488 | #ifndef MODULE | |
1489 | int __devinit pxafb_setup(char *options) | |
1490 | { | |
1491 | # ifdef CONFIG_FB_PXA_PARAMETERS | |
fb79ffa4 OR |
1492 | if (options) |
1493 | strlcpy(g_options, options, sizeof(g_options)); | |
1da177e4 LT |
1494 | # endif |
1495 | return 0; | |
1496 | } | |
1497 | #else | |
1498 | # ifdef CONFIG_FB_PXA_PARAMETERS | |
1499 | module_param_string(options, g_options, sizeof(g_options), 0); | |
1500 | MODULE_PARM_DESC(options, "LCD parameters (see Documentation/fb/pxafb.txt)"); | |
1501 | # endif | |
1502 | #endif | |
1503 | ||
1504 | int __devinit pxafb_init(void) | |
1505 | { | |
1506 | #ifndef MODULE | |
1507 | char *option = NULL; | |
1508 | ||
1509 | if (fb_get_options("pxafb", &option)) | |
1510 | return -ENODEV; | |
1511 | pxafb_setup(option); | |
1512 | #endif | |
3ae5eaec | 1513 | return platform_driver_register(&pxafb_driver); |
1da177e4 LT |
1514 | } |
1515 | ||
1516 | module_init(pxafb_init); | |
1517 | ||
1518 | MODULE_DESCRIPTION("loadable framebuffer driver for PXA"); | |
1519 | MODULE_LICENSE("GPL"); |