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88017bda RM |
1 | /* |
2 | * linux/drivers/video/ep93xx-fb.c | |
3 | * | |
4 | * Framebuffer support for the EP93xx series. | |
5 | * | |
6 | * Copyright (C) 2007 Bluewater Systems Ltd | |
7 | * Author: Ryan Mallon <ryan@bluewatersys.com> | |
8 | * | |
9 | * Copyright (c) 2009 H Hartley Sweeten <hsweeten@visionengravers.com> | |
10 | * | |
11 | * Based on the Cirrus Logic ep93xxfb driver, and various other ep93xxfb | |
12 | * drivers. | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License version 2 as | |
16 | * published by the Free Software Foundation. | |
17 | * | |
18 | */ | |
19 | ||
20 | #include <linux/platform_device.h> | |
21 | #include <linux/dma-mapping.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
88017bda RM |
23 | #include <linux/clk.h> |
24 | #include <linux/fb.h> | |
25 | ||
26 | #include <mach/fb.h> | |
27 | ||
28 | /* Vertical Frame Timing Registers */ | |
29 | #define EP93XXFB_VLINES_TOTAL 0x0000 /* SW locked */ | |
30 | #define EP93XXFB_VSYNC 0x0004 /* SW locked */ | |
31 | #define EP93XXFB_VACTIVE 0x0008 /* SW locked */ | |
32 | #define EP93XXFB_VBLANK 0x0228 /* SW locked */ | |
33 | #define EP93XXFB_VCLK 0x000c /* SW locked */ | |
34 | ||
35 | /* Horizontal Frame Timing Registers */ | |
36 | #define EP93XXFB_HCLKS_TOTAL 0x0010 /* SW locked */ | |
37 | #define EP93XXFB_HSYNC 0x0014 /* SW locked */ | |
38 | #define EP93XXFB_HACTIVE 0x0018 /* SW locked */ | |
39 | #define EP93XXFB_HBLANK 0x022c /* SW locked */ | |
40 | #define EP93XXFB_HCLK 0x001c /* SW locked */ | |
41 | ||
42 | /* Frame Buffer Memory Configuration Registers */ | |
43 | #define EP93XXFB_SCREEN_PAGE 0x0028 | |
44 | #define EP93XXFB_SCREEN_HPAGE 0x002c | |
45 | #define EP93XXFB_SCREEN_LINES 0x0030 | |
46 | #define EP93XXFB_LINE_LENGTH 0x0034 | |
47 | #define EP93XXFB_VLINE_STEP 0x0038 | |
48 | #define EP93XXFB_LINE_CARRY 0x003c /* SW locked */ | |
49 | #define EP93XXFB_EOL_OFFSET 0x0230 | |
50 | ||
51 | /* Other Video Registers */ | |
52 | #define EP93XXFB_BRIGHTNESS 0x0020 | |
53 | #define EP93XXFB_ATTRIBS 0x0024 /* SW locked */ | |
54 | #define EP93XXFB_SWLOCK 0x007c /* SW locked */ | |
55 | #define EP93XXFB_AC_RATE 0x0214 | |
56 | #define EP93XXFB_FIFO_LEVEL 0x0234 | |
57 | #define EP93XXFB_PIXELMODE 0x0054 | |
58 | #define EP93XXFB_PIXELMODE_32BPP (0x7 << 0) | |
59 | #define EP93XXFB_PIXELMODE_24BPP (0x6 << 0) | |
60 | #define EP93XXFB_PIXELMODE_16BPP (0x4 << 0) | |
61 | #define EP93XXFB_PIXELMODE_8BPP (0x2 << 0) | |
62 | #define EP93XXFB_PIXELMODE_SHIFT_1P_24B (0x0 << 3) | |
63 | #define EP93XXFB_PIXELMODE_SHIFT_1P_18B (0x1 << 3) | |
64 | #define EP93XXFB_PIXELMODE_COLOR_LUT (0x0 << 10) | |
65 | #define EP93XXFB_PIXELMODE_COLOR_888 (0x4 << 10) | |
66 | #define EP93XXFB_PIXELMODE_COLOR_555 (0x5 << 10) | |
67 | #define EP93XXFB_PARL_IF_OUT 0x0058 | |
68 | #define EP93XXFB_PARL_IF_IN 0x005c | |
69 | ||
70 | /* Blink Control Registers */ | |
71 | #define EP93XXFB_BLINK_RATE 0x0040 | |
72 | #define EP93XXFB_BLINK_MASK 0x0044 | |
73 | #define EP93XXFB_BLINK_PATTRN 0x0048 | |
74 | #define EP93XXFB_PATTRN_MASK 0x004c | |
75 | #define EP93XXFB_BKGRND_OFFSET 0x0050 | |
76 | ||
77 | /* Hardware Cursor Registers */ | |
78 | #define EP93XXFB_CURSOR_ADR_START 0x0060 | |
79 | #define EP93XXFB_CURSOR_ADR_RESET 0x0064 | |
80 | #define EP93XXFB_CURSOR_SIZE 0x0068 | |
81 | #define EP93XXFB_CURSOR_COLOR1 0x006c | |
82 | #define EP93XXFB_CURSOR_COLOR2 0x0070 | |
83 | #define EP93XXFB_CURSOR_BLINK_COLOR1 0x021c | |
84 | #define EP93XXFB_CURSOR_BLINK_COLOR2 0x0220 | |
85 | #define EP93XXFB_CURSOR_XY_LOC 0x0074 | |
86 | #define EP93XXFB_CURSOR_DSCAN_HY_LOC 0x0078 | |
87 | #define EP93XXFB_CURSOR_BLINK_RATE_CTRL 0x0224 | |
88 | ||
89 | /* LUT Registers */ | |
90 | #define EP93XXFB_GRY_SCL_LUTR 0x0080 | |
91 | #define EP93XXFB_GRY_SCL_LUTG 0x0280 | |
92 | #define EP93XXFB_GRY_SCL_LUTB 0x0300 | |
93 | #define EP93XXFB_LUT_SW_CONTROL 0x0218 | |
94 | #define EP93XXFB_LUT_SW_CONTROL_SWTCH (1 << 0) | |
95 | #define EP93XXFB_LUT_SW_CONTROL_SSTAT (1 << 1) | |
96 | #define EP93XXFB_COLOR_LUT 0x0400 | |
97 | ||
98 | /* Video Signature Registers */ | |
99 | #define EP93XXFB_VID_SIG_RSLT_VAL 0x0200 | |
100 | #define EP93XXFB_VID_SIG_CTRL 0x0204 | |
101 | #define EP93XXFB_VSIG 0x0208 | |
102 | #define EP93XXFB_HSIG 0x020c | |
103 | #define EP93XXFB_SIG_CLR_STR 0x0210 | |
104 | ||
105 | /* Minimum / Maximum resolutions supported */ | |
106 | #define EP93XXFB_MIN_XRES 64 | |
107 | #define EP93XXFB_MIN_YRES 64 | |
108 | #define EP93XXFB_MAX_XRES 1024 | |
109 | #define EP93XXFB_MAX_YRES 768 | |
110 | ||
111 | struct ep93xx_fbi { | |
112 | struct ep93xxfb_mach_info *mach_info; | |
113 | struct clk *clk; | |
114 | struct resource *res; | |
115 | void __iomem *mmio_base; | |
116 | unsigned int pseudo_palette[256]; | |
117 | }; | |
118 | ||
119 | static int check_screenpage_bug = 1; | |
120 | module_param(check_screenpage_bug, int, 0644); | |
121 | MODULE_PARM_DESC(check_screenpage_bug, | |
122 | "Check for bit 27 screen page bug. Default = 1"); | |
123 | ||
124 | static inline unsigned int ep93xxfb_readl(struct ep93xx_fbi *fbi, | |
125 | unsigned int off) | |
126 | { | |
127 | return __raw_readl(fbi->mmio_base + off); | |
128 | } | |
129 | ||
130 | static inline void ep93xxfb_writel(struct ep93xx_fbi *fbi, | |
131 | unsigned int val, unsigned int off) | |
132 | { | |
133 | __raw_writel(val, fbi->mmio_base + off); | |
134 | } | |
135 | ||
136 | /* | |
137 | * Write to one of the locked raster registers. | |
138 | */ | |
139 | static inline void ep93xxfb_out_locked(struct ep93xx_fbi *fbi, | |
140 | unsigned int val, unsigned int reg) | |
141 | { | |
142 | /* | |
143 | * We don't need a lock or delay here since the raster register | |
144 | * block will remain unlocked until the next access. | |
145 | */ | |
146 | ep93xxfb_writel(fbi, 0xaa, EP93XXFB_SWLOCK); | |
147 | ep93xxfb_writel(fbi, val, reg); | |
148 | } | |
149 | ||
150 | static void ep93xxfb_set_video_attribs(struct fb_info *info) | |
151 | { | |
152 | struct ep93xx_fbi *fbi = info->par; | |
153 | unsigned int attribs; | |
154 | ||
155 | attribs = EP93XXFB_ENABLE; | |
156 | attribs |= fbi->mach_info->flags; | |
157 | ep93xxfb_out_locked(fbi, attribs, EP93XXFB_ATTRIBS); | |
158 | } | |
159 | ||
160 | static int ep93xxfb_set_pixelmode(struct fb_info *info) | |
161 | { | |
162 | struct ep93xx_fbi *fbi = info->par; | |
163 | unsigned int val; | |
164 | ||
165 | info->var.transp.offset = 0; | |
166 | info->var.transp.length = 0; | |
167 | ||
168 | switch (info->var.bits_per_pixel) { | |
169 | case 8: | |
170 | val = EP93XXFB_PIXELMODE_8BPP | EP93XXFB_PIXELMODE_COLOR_LUT | | |
171 | EP93XXFB_PIXELMODE_SHIFT_1P_18B; | |
172 | ||
173 | info->var.red.offset = 0; | |
174 | info->var.red.length = 8; | |
175 | info->var.green.offset = 0; | |
176 | info->var.green.length = 8; | |
177 | info->var.blue.offset = 0; | |
178 | info->var.blue.length = 8; | |
179 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; | |
180 | break; | |
181 | ||
182 | case 16: | |
183 | val = EP93XXFB_PIXELMODE_16BPP | EP93XXFB_PIXELMODE_COLOR_555 | | |
184 | EP93XXFB_PIXELMODE_SHIFT_1P_18B; | |
185 | ||
186 | info->var.red.offset = 11; | |
187 | info->var.red.length = 5; | |
188 | info->var.green.offset = 5; | |
189 | info->var.green.length = 6; | |
190 | info->var.blue.offset = 0; | |
191 | info->var.blue.length = 5; | |
192 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
193 | break; | |
194 | ||
195 | case 24: | |
196 | val = EP93XXFB_PIXELMODE_24BPP | EP93XXFB_PIXELMODE_COLOR_888 | | |
197 | EP93XXFB_PIXELMODE_SHIFT_1P_24B; | |
198 | ||
199 | info->var.red.offset = 16; | |
200 | info->var.red.length = 8; | |
201 | info->var.green.offset = 8; | |
202 | info->var.green.length = 8; | |
203 | info->var.blue.offset = 0; | |
204 | info->var.blue.length = 8; | |
205 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
206 | break; | |
207 | ||
208 | case 32: | |
209 | val = EP93XXFB_PIXELMODE_32BPP | EP93XXFB_PIXELMODE_COLOR_888 | | |
210 | EP93XXFB_PIXELMODE_SHIFT_1P_24B; | |
211 | ||
212 | info->var.red.offset = 16; | |
213 | info->var.red.length = 8; | |
214 | info->var.green.offset = 8; | |
215 | info->var.green.length = 8; | |
216 | info->var.blue.offset = 0; | |
217 | info->var.blue.length = 8; | |
218 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
219 | break; | |
220 | ||
221 | default: | |
222 | return -EINVAL; | |
223 | } | |
224 | ||
225 | ep93xxfb_writel(fbi, val, EP93XXFB_PIXELMODE); | |
226 | return 0; | |
227 | } | |
228 | ||
229 | static void ep93xxfb_set_timing(struct fb_info *info) | |
230 | { | |
231 | struct ep93xx_fbi *fbi = info->par; | |
232 | unsigned int vlines_total, hclks_total, start, stop; | |
233 | ||
234 | vlines_total = info->var.yres + info->var.upper_margin + | |
235 | info->var.lower_margin + info->var.vsync_len - 1; | |
236 | ||
237 | hclks_total = info->var.xres + info->var.left_margin + | |
238 | info->var.right_margin + info->var.hsync_len - 1; | |
239 | ||
240 | ep93xxfb_out_locked(fbi, vlines_total, EP93XXFB_VLINES_TOTAL); | |
241 | ep93xxfb_out_locked(fbi, hclks_total, EP93XXFB_HCLKS_TOTAL); | |
242 | ||
243 | start = vlines_total; | |
244 | stop = vlines_total - info->var.vsync_len; | |
245 | ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VSYNC); | |
246 | ||
247 | start = vlines_total - info->var.vsync_len - info->var.upper_margin; | |
248 | stop = info->var.lower_margin - 1; | |
249 | ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VBLANK); | |
250 | ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VACTIVE); | |
251 | ||
252 | start = vlines_total; | |
253 | stop = vlines_total + 1; | |
254 | ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_VCLK); | |
255 | ||
256 | start = hclks_total; | |
257 | stop = hclks_total - info->var.hsync_len; | |
258 | ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HSYNC); | |
259 | ||
260 | start = hclks_total - info->var.hsync_len - info->var.left_margin; | |
261 | stop = info->var.right_margin - 1; | |
262 | ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HBLANK); | |
263 | ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HACTIVE); | |
264 | ||
265 | start = hclks_total; | |
266 | stop = hclks_total; | |
267 | ep93xxfb_out_locked(fbi, start | (stop << 16), EP93XXFB_HCLK); | |
268 | ||
269 | ep93xxfb_out_locked(fbi, 0x0, EP93XXFB_LINE_CARRY); | |
270 | } | |
271 | ||
272 | static int ep93xxfb_set_par(struct fb_info *info) | |
273 | { | |
274 | struct ep93xx_fbi *fbi = info->par; | |
275 | ||
276 | clk_set_rate(fbi->clk, 1000 * PICOS2KHZ(info->var.pixclock)); | |
277 | ||
278 | ep93xxfb_set_timing(info); | |
279 | ||
280 | info->fix.line_length = info->var.xres_virtual * | |
281 | info->var.bits_per_pixel / 8; | |
282 | ||
283 | ep93xxfb_writel(fbi, info->fix.smem_start, EP93XXFB_SCREEN_PAGE); | |
284 | ep93xxfb_writel(fbi, info->var.yres - 1, EP93XXFB_SCREEN_LINES); | |
285 | ep93xxfb_writel(fbi, ((info->var.xres * info->var.bits_per_pixel) | |
286 | / 32) - 1, EP93XXFB_LINE_LENGTH); | |
287 | ep93xxfb_writel(fbi, info->fix.line_length / 4, EP93XXFB_VLINE_STEP); | |
288 | ep93xxfb_set_video_attribs(info); | |
289 | return 0; | |
290 | } | |
291 | ||
292 | static int ep93xxfb_check_var(struct fb_var_screeninfo *var, | |
293 | struct fb_info *info) | |
294 | { | |
295 | int err; | |
296 | ||
297 | err = ep93xxfb_set_pixelmode(info); | |
298 | if (err) | |
299 | return err; | |
300 | ||
301 | var->xres = max_t(unsigned int, var->xres, EP93XXFB_MIN_XRES); | |
302 | var->xres = min_t(unsigned int, var->xres, EP93XXFB_MAX_XRES); | |
303 | var->xres_virtual = max(var->xres_virtual, var->xres); | |
304 | ||
305 | var->yres = max_t(unsigned int, var->yres, EP93XXFB_MIN_YRES); | |
306 | var->yres = min_t(unsigned int, var->yres, EP93XXFB_MAX_YRES); | |
307 | var->yres_virtual = max(var->yres_virtual, var->yres); | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
312 | static int ep93xxfb_mmap(struct fb_info *info, struct vm_area_struct *vma) | |
313 | { | |
314 | unsigned int offset = vma->vm_pgoff << PAGE_SHIFT; | |
315 | ||
316 | if (offset < info->fix.smem_len) { | |
317 | return dma_mmap_writecombine(info->dev, vma, info->screen_base, | |
318 | info->fix.smem_start, | |
319 | info->fix.smem_len); | |
320 | } | |
321 | ||
322 | return -EINVAL; | |
323 | } | |
324 | ||
325 | static int ep93xxfb_blank(int blank_mode, struct fb_info *info) | |
326 | { | |
327 | struct ep93xx_fbi *fbi = info->par; | |
328 | unsigned int attribs = ep93xxfb_readl(fbi, EP93XXFB_ATTRIBS); | |
329 | ||
330 | if (blank_mode) { | |
331 | if (fbi->mach_info->blank) | |
332 | fbi->mach_info->blank(blank_mode, info); | |
333 | ep93xxfb_out_locked(fbi, attribs & ~EP93XXFB_ENABLE, | |
334 | EP93XXFB_ATTRIBS); | |
335 | clk_disable(fbi->clk); | |
336 | } else { | |
337 | clk_enable(fbi->clk); | |
338 | ep93xxfb_out_locked(fbi, attribs | EP93XXFB_ENABLE, | |
339 | EP93XXFB_ATTRIBS); | |
340 | if (fbi->mach_info->blank) | |
341 | fbi->mach_info->blank(blank_mode, info); | |
342 | } | |
343 | ||
344 | return 0; | |
345 | } | |
346 | ||
347 | static inline int ep93xxfb_convert_color(int val, int width) | |
348 | { | |
349 | return ((val << width) + 0x7fff - val) >> 16; | |
350 | } | |
351 | ||
352 | static int ep93xxfb_setcolreg(unsigned int regno, unsigned int red, | |
353 | unsigned int green, unsigned int blue, | |
354 | unsigned int transp, struct fb_info *info) | |
355 | { | |
356 | struct ep93xx_fbi *fbi = info->par; | |
357 | unsigned int *pal = info->pseudo_palette; | |
358 | unsigned int ctrl, i, rgb, lut_current, lut_stat; | |
359 | ||
360 | switch (info->fix.visual) { | |
361 | case FB_VISUAL_PSEUDOCOLOR: | |
2f390380 KH |
362 | if (regno > 255) |
363 | return 1; | |
88017bda RM |
364 | rgb = ((red & 0xff00) << 8) | (green & 0xff00) | |
365 | ((blue & 0xff00) >> 8); | |
366 | ||
367 | pal[regno] = rgb; | |
368 | ep93xxfb_writel(fbi, rgb, (EP93XXFB_COLOR_LUT + (regno << 2))); | |
369 | ctrl = ep93xxfb_readl(fbi, EP93XXFB_LUT_SW_CONTROL); | |
370 | lut_stat = !!(ctrl & EP93XXFB_LUT_SW_CONTROL_SSTAT); | |
371 | lut_current = !!(ctrl & EP93XXFB_LUT_SW_CONTROL_SWTCH); | |
372 | ||
373 | if (lut_stat == lut_current) { | |
374 | for (i = 0; i < 256; i++) { | |
375 | ep93xxfb_writel(fbi, pal[i], | |
376 | EP93XXFB_COLOR_LUT + (i << 2)); | |
377 | } | |
378 | ||
379 | ep93xxfb_writel(fbi, | |
380 | ctrl ^ EP93XXFB_LUT_SW_CONTROL_SWTCH, | |
381 | EP93XXFB_LUT_SW_CONTROL); | |
382 | } | |
383 | break; | |
384 | ||
385 | case FB_VISUAL_TRUECOLOR: | |
386 | if (regno > 16) | |
387 | return 1; | |
388 | ||
389 | red = ep93xxfb_convert_color(red, info->var.red.length); | |
390 | green = ep93xxfb_convert_color(green, info->var.green.length); | |
391 | blue = ep93xxfb_convert_color(blue, info->var.blue.length); | |
392 | transp = ep93xxfb_convert_color(transp, | |
393 | info->var.transp.length); | |
394 | ||
395 | pal[regno] = (red << info->var.red.offset) | | |
396 | (green << info->var.green.offset) | | |
397 | (blue << info->var.blue.offset) | | |
398 | (transp << info->var.transp.offset); | |
399 | break; | |
400 | ||
401 | default: | |
402 | return 1; | |
403 | } | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
408 | static struct fb_ops ep93xxfb_ops = { | |
409 | .owner = THIS_MODULE, | |
410 | .fb_check_var = ep93xxfb_check_var, | |
411 | .fb_set_par = ep93xxfb_set_par, | |
412 | .fb_blank = ep93xxfb_blank, | |
413 | .fb_fillrect = cfb_fillrect, | |
414 | .fb_copyarea = cfb_copyarea, | |
415 | .fb_imageblit = cfb_imageblit, | |
416 | .fb_setcolreg = ep93xxfb_setcolreg, | |
417 | .fb_mmap = ep93xxfb_mmap, | |
418 | }; | |
419 | ||
420 | static int __init ep93xxfb_calc_fbsize(struct ep93xxfb_mach_info *mach_info) | |
421 | { | |
422 | int i, fb_size = 0; | |
423 | ||
424 | if (mach_info->num_modes == EP93XXFB_USE_MODEDB) { | |
425 | fb_size = EP93XXFB_MAX_XRES * EP93XXFB_MAX_YRES * | |
426 | mach_info->bpp / 8; | |
427 | } else { | |
428 | for (i = 0; i < mach_info->num_modes; i++) { | |
429 | const struct fb_videomode *mode; | |
430 | int size; | |
431 | ||
432 | mode = &mach_info->modes[i]; | |
433 | size = mode->xres * mode->yres * mach_info->bpp / 8; | |
434 | if (size > fb_size) | |
435 | fb_size = size; | |
436 | } | |
437 | } | |
438 | ||
439 | return fb_size; | |
440 | } | |
441 | ||
442 | static int __init ep93xxfb_alloc_videomem(struct fb_info *info) | |
443 | { | |
444 | struct ep93xx_fbi *fbi = info->par; | |
445 | char __iomem *virt_addr; | |
446 | dma_addr_t phys_addr; | |
447 | unsigned int fb_size; | |
448 | ||
449 | fb_size = ep93xxfb_calc_fbsize(fbi->mach_info); | |
450 | virt_addr = dma_alloc_writecombine(info->dev, fb_size, | |
451 | &phys_addr, GFP_KERNEL); | |
452 | if (!virt_addr) | |
453 | return -ENOMEM; | |
454 | ||
455 | /* | |
456 | * There is a bug in the ep93xx framebuffer which causes problems | |
457 | * if bit 27 of the physical address is set. | |
458 | * See: http://marc.info/?l=linux-arm-kernel&m=110061245502000&w=2 | |
459 | * There does not seem to be any offical errata for this, but I | |
460 | * have confirmed the problem exists on my hardware (ep9315) at | |
461 | * least. | |
462 | */ | |
463 | if (check_screenpage_bug && phys_addr & (1 << 27)) { | |
464 | dev_err(info->dev, "ep93xx framebuffer bug. phys addr (0x%x) " | |
465 | "has bit 27 set: cannot init framebuffer\n", | |
466 | phys_addr); | |
467 | ||
468 | dma_free_coherent(info->dev, fb_size, virt_addr, phys_addr); | |
469 | return -ENOMEM; | |
470 | } | |
471 | ||
472 | info->fix.smem_start = phys_addr; | |
473 | info->fix.smem_len = fb_size; | |
474 | info->screen_base = virt_addr; | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
479 | static void ep93xxfb_dealloc_videomem(struct fb_info *info) | |
480 | { | |
481 | if (info->screen_base) | |
482 | dma_free_coherent(info->dev, info->fix.smem_len, | |
483 | info->screen_base, info->fix.smem_start); | |
484 | } | |
485 | ||
486 | static int __init ep93xxfb_probe(struct platform_device *pdev) | |
487 | { | |
488 | struct ep93xxfb_mach_info *mach_info = pdev->dev.platform_data; | |
489 | struct fb_info *info; | |
490 | struct ep93xx_fbi *fbi; | |
491 | struct resource *res; | |
492 | char *video_mode; | |
493 | int err; | |
494 | ||
495 | if (!mach_info) | |
496 | return -EINVAL; | |
497 | ||
498 | info = framebuffer_alloc(sizeof(struct ep93xx_fbi), &pdev->dev); | |
499 | if (!info) | |
500 | return -ENOMEM; | |
501 | ||
502 | info->dev = &pdev->dev; | |
503 | platform_set_drvdata(pdev, info); | |
504 | fbi = info->par; | |
505 | fbi->mach_info = mach_info; | |
506 | ||
507 | err = fb_alloc_cmap(&info->cmap, 256, 0); | |
508 | if (err) | |
509 | goto failed; | |
510 | ||
511 | err = ep93xxfb_alloc_videomem(info); | |
512 | if (err) | |
513 | goto failed; | |
514 | ||
515 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
516 | if (!res) { | |
517 | err = -ENXIO; | |
518 | goto failed; | |
519 | } | |
520 | ||
521 | res = request_mem_region(res->start, resource_size(res), pdev->name); | |
522 | if (!res) { | |
523 | err = -EBUSY; | |
524 | goto failed; | |
525 | } | |
526 | ||
527 | fbi->res = res; | |
528 | fbi->mmio_base = ioremap(res->start, resource_size(res)); | |
529 | if (!fbi->mmio_base) { | |
530 | err = -ENXIO; | |
531 | goto failed; | |
532 | } | |
533 | ||
534 | strcpy(info->fix.id, pdev->name); | |
535 | info->fbops = &ep93xxfb_ops; | |
536 | info->fix.type = FB_TYPE_PACKED_PIXELS; | |
537 | info->fix.accel = FB_ACCEL_NONE; | |
538 | info->var.activate = FB_ACTIVATE_NOW; | |
539 | info->var.vmode = FB_VMODE_NONINTERLACED; | |
540 | info->flags = FBINFO_DEFAULT; | |
541 | info->node = -1; | |
542 | info->state = FBINFO_STATE_RUNNING; | |
543 | info->pseudo_palette = &fbi->pseudo_palette; | |
544 | ||
545 | fb_get_options("ep93xx-fb", &video_mode); | |
546 | err = fb_find_mode(&info->var, info, video_mode, | |
547 | fbi->mach_info->modes, fbi->mach_info->num_modes, | |
548 | fbi->mach_info->default_mode, fbi->mach_info->bpp); | |
549 | if (err == 0) { | |
550 | dev_err(info->dev, "No suitable video mode found\n"); | |
551 | err = -EINVAL; | |
552 | goto failed; | |
553 | } | |
554 | ||
555 | if (mach_info->setup) { | |
556 | err = mach_info->setup(pdev); | |
557 | if (err) | |
558 | return err; | |
559 | } | |
560 | ||
561 | err = ep93xxfb_check_var(&info->var, info); | |
562 | if (err) | |
563 | goto failed; | |
564 | ||
565 | fbi->clk = clk_get(info->dev, NULL); | |
566 | if (IS_ERR(fbi->clk)) { | |
567 | err = PTR_ERR(fbi->clk); | |
568 | fbi->clk = NULL; | |
569 | goto failed; | |
570 | } | |
571 | ||
572 | ep93xxfb_set_par(info); | |
573 | clk_enable(fbi->clk); | |
574 | ||
575 | err = register_framebuffer(info); | |
576 | if (err) | |
577 | goto failed; | |
578 | ||
579 | dev_info(info->dev, "registered. Mode = %dx%d-%d\n", | |
580 | info->var.xres, info->var.yres, info->var.bits_per_pixel); | |
581 | return 0; | |
582 | ||
583 | failed: | |
584 | if (fbi->clk) | |
585 | clk_put(fbi->clk); | |
586 | if (fbi->mmio_base) | |
587 | iounmap(fbi->mmio_base); | |
588 | if (fbi->res) | |
589 | release_mem_region(fbi->res->start, resource_size(fbi->res)); | |
590 | ep93xxfb_dealloc_videomem(info); | |
591 | if (&info->cmap) | |
592 | fb_dealloc_cmap(&info->cmap); | |
593 | if (fbi->mach_info->teardown) | |
594 | fbi->mach_info->teardown(pdev); | |
595 | kfree(info); | |
596 | platform_set_drvdata(pdev, NULL); | |
597 | ||
598 | return err; | |
599 | } | |
600 | ||
601 | static int ep93xxfb_remove(struct platform_device *pdev) | |
602 | { | |
603 | struct fb_info *info = platform_get_drvdata(pdev); | |
604 | struct ep93xx_fbi *fbi = info->par; | |
605 | ||
606 | unregister_framebuffer(info); | |
607 | clk_disable(fbi->clk); | |
608 | clk_put(fbi->clk); | |
609 | iounmap(fbi->mmio_base); | |
610 | release_mem_region(fbi->res->start, resource_size(fbi->res)); | |
611 | ep93xxfb_dealloc_videomem(info); | |
612 | fb_dealloc_cmap(&info->cmap); | |
613 | ||
614 | if (fbi->mach_info->teardown) | |
615 | fbi->mach_info->teardown(pdev); | |
616 | ||
617 | kfree(info); | |
618 | platform_set_drvdata(pdev, NULL); | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
623 | static struct platform_driver ep93xxfb_driver = { | |
624 | .probe = ep93xxfb_probe, | |
625 | .remove = ep93xxfb_remove, | |
626 | .driver = { | |
627 | .name = "ep93xx-fb", | |
628 | .owner = THIS_MODULE, | |
629 | }, | |
630 | }; | |
631 | ||
632 | static int __devinit ep93xxfb_init(void) | |
633 | { | |
634 | return platform_driver_register(&ep93xxfb_driver); | |
635 | } | |
636 | ||
637 | static void __exit ep93xxfb_exit(void) | |
638 | { | |
639 | platform_driver_unregister(&ep93xxfb_driver); | |
640 | } | |
641 | ||
642 | module_init(ep93xxfb_init); | |
643 | module_exit(ep93xxfb_exit); | |
644 | ||
645 | MODULE_DESCRIPTION("EP93XX Framebuffer Driver"); | |
646 | MODULE_ALIAS("platform:ep93xx-fb"); | |
647 | MODULE_AUTHOR("Ryan Mallon <ryan&bluewatersys.com>, " | |
648 | "H Hartley Sweeten <hsweeten@visionengravers.com"); | |
649 | MODULE_LICENSE("GPL"); |