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d6ff7d0f AC |
1 | /* |
2 | * WonderMedia WM8505 Frame Buffer device driver | |
3 | * | |
4 | * Copyright (C) 2010 Ed Spiridonov <edo.rus@gmail.com> | |
5 | * Based on vt8500lcdfb.c | |
6 | * | |
7 | * This software is licensed under the terms of the GNU General Public | |
8 | * License version 2, as published by the Free Software Foundation, and | |
9 | * may be copied, distributed, and modified under those terms. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | */ | |
16 | ||
17 | #include <linux/module.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/delay.h> | |
24 | #include <linux/fb.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/io.h> | |
28 | #include <linux/dma-mapping.h> | |
29 | #include <linux/platform_device.h> | |
30 | #include <linux/wait.h> | |
31 | ||
32 | #include <mach/vt8500fb.h> | |
33 | ||
34 | #include "wm8505fb_regs.h" | |
35 | #include "wmt_ge_rops.h" | |
36 | ||
37 | #define DRIVER_NAME "wm8505-fb" | |
38 | ||
39 | #define to_wm8505fb_info(__info) container_of(__info, \ | |
40 | struct wm8505fb_info, fb) | |
41 | struct wm8505fb_info { | |
42 | struct fb_info fb; | |
43 | void __iomem *regbase; | |
44 | unsigned int contrast; | |
45 | }; | |
46 | ||
47 | ||
48 | static int wm8505fb_init_hw(struct fb_info *info) | |
49 | { | |
50 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
51 | ||
52 | int i; | |
53 | ||
54 | /* I know the purpose only of few registers, so clear unknown */ | |
55 | for (i = 0; i < 0x200; i += 4) | |
56 | writel(0, fbi->regbase + i); | |
57 | ||
58 | /* Set frame buffer address */ | |
59 | writel(fbi->fb.fix.smem_start, fbi->regbase + WMT_GOVR_FBADDR); | |
60 | writel(fbi->fb.fix.smem_start, fbi->regbase + WMT_GOVR_FBADDR1); | |
61 | ||
62 | /* Set in-memory picture format to RGB 32bpp */ | |
63 | writel(0x1c, fbi->regbase + WMT_GOVR_COLORSPACE); | |
64 | writel(1, fbi->regbase + WMT_GOVR_COLORSPACE1); | |
65 | ||
66 | /* Virtual buffer size */ | |
67 | writel(info->var.xres, fbi->regbase + WMT_GOVR_XRES); | |
68 | writel(info->var.xres_virtual, fbi->regbase + WMT_GOVR_XRES_VIRTUAL); | |
69 | ||
70 | /* black magic ;) */ | |
71 | writel(0xf, fbi->regbase + WMT_GOVR_FHI); | |
72 | writel(4, fbi->regbase + WMT_GOVR_DVO_SET); | |
73 | writel(1, fbi->regbase + WMT_GOVR_MIF_ENABLE); | |
74 | writel(1, fbi->regbase + WMT_GOVR_REG_UPDATE); | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
79 | static int wm8505fb_set_timing(struct fb_info *info) | |
80 | { | |
81 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
82 | ||
83 | int h_start = info->var.left_margin; | |
84 | int h_end = h_start + info->var.xres; | |
85 | int h_all = h_end + info->var.right_margin; | |
86 | int h_sync = info->var.hsync_len; | |
87 | ||
88 | int v_start = info->var.upper_margin; | |
89 | int v_end = v_start + info->var.yres; | |
90 | int v_all = v_end + info->var.lower_margin; | |
623eb156 | 91 | int v_sync = info->var.vsync_len; |
d6ff7d0f AC |
92 | |
93 | writel(0, fbi->regbase + WMT_GOVR_TG); | |
94 | ||
95 | writel(h_start, fbi->regbase + WMT_GOVR_TIMING_H_START); | |
96 | writel(h_end, fbi->regbase + WMT_GOVR_TIMING_H_END); | |
97 | writel(h_all, fbi->regbase + WMT_GOVR_TIMING_H_ALL); | |
98 | writel(h_sync, fbi->regbase + WMT_GOVR_TIMING_H_SYNC); | |
99 | ||
100 | writel(v_start, fbi->regbase + WMT_GOVR_TIMING_V_START); | |
101 | writel(v_end, fbi->regbase + WMT_GOVR_TIMING_V_END); | |
102 | writel(v_all, fbi->regbase + WMT_GOVR_TIMING_V_ALL); | |
103 | writel(v_sync, fbi->regbase + WMT_GOVR_TIMING_V_SYNC); | |
104 | ||
105 | writel(1, fbi->regbase + WMT_GOVR_TG); | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
110 | ||
111 | static int wm8505fb_set_par(struct fb_info *info) | |
112 | { | |
113 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
114 | ||
115 | if (!fbi) | |
116 | return -EINVAL; | |
117 | ||
118 | if (info->var.bits_per_pixel == 32) { | |
119 | info->var.red.offset = 16; | |
120 | info->var.red.length = 8; | |
121 | info->var.red.msb_right = 0; | |
122 | info->var.green.offset = 8; | |
123 | info->var.green.length = 8; | |
124 | info->var.green.msb_right = 0; | |
125 | info->var.blue.offset = 0; | |
126 | info->var.blue.length = 8; | |
127 | info->var.blue.msb_right = 0; | |
128 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
129 | info->fix.line_length = info->var.xres_virtual << 2; | |
130 | } | |
131 | ||
132 | wm8505fb_set_timing(info); | |
133 | ||
134 | writel(fbi->contrast<<16 | fbi->contrast<<8 | fbi->contrast, | |
135 | fbi->regbase + WMT_GOVR_CONTRAST); | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | static ssize_t contrast_show(struct device *dev, | |
141 | struct device_attribute *attr, char *buf) | |
142 | { | |
143 | struct fb_info *info = dev_get_drvdata(dev); | |
144 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
145 | ||
146 | return sprintf(buf, "%d\n", fbi->contrast); | |
147 | } | |
148 | ||
149 | static ssize_t contrast_store(struct device *dev, | |
150 | struct device_attribute *attr, | |
151 | const char *buf, size_t count) | |
152 | { | |
153 | struct fb_info *info = dev_get_drvdata(dev); | |
154 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
155 | unsigned long tmp; | |
156 | ||
157 | if (strict_strtoul(buf, 10, &tmp) || (tmp > 0xff)) | |
158 | return -EINVAL; | |
159 | fbi->contrast = tmp; | |
160 | ||
161 | wm8505fb_set_par(info); | |
162 | ||
163 | return count; | |
164 | } | |
165 | ||
166 | static DEVICE_ATTR(contrast, 0644, contrast_show, contrast_store); | |
167 | ||
168 | static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) | |
169 | { | |
170 | chan &= 0xffff; | |
171 | chan >>= 16 - bf->length; | |
172 | return chan << bf->offset; | |
173 | } | |
174 | ||
175 | static int wm8505fb_setcolreg(unsigned regno, unsigned red, unsigned green, | |
176 | unsigned blue, unsigned transp, | |
177 | struct fb_info *info) { | |
178 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
179 | int ret = 1; | |
180 | unsigned int val; | |
181 | if (regno >= 256) | |
182 | return -EINVAL; | |
183 | ||
184 | if (info->var.grayscale) | |
185 | red = green = blue = | |
186 | (19595 * red + 38470 * green + 7471 * blue) >> 16; | |
187 | ||
188 | switch (fbi->fb.fix.visual) { | |
189 | case FB_VISUAL_TRUECOLOR: | |
190 | if (regno < 16) { | |
191 | u32 *pal = info->pseudo_palette; | |
192 | ||
193 | val = chan_to_field(red, &fbi->fb.var.red); | |
194 | val |= chan_to_field(green, &fbi->fb.var.green); | |
195 | val |= chan_to_field(blue, &fbi->fb.var.blue); | |
196 | ||
197 | pal[regno] = val; | |
198 | ret = 0; | |
199 | } | |
200 | break; | |
201 | } | |
202 | ||
203 | return ret; | |
204 | } | |
205 | ||
206 | static int wm8505fb_pan_display(struct fb_var_screeninfo *var, | |
207 | struct fb_info *info) | |
208 | { | |
209 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
210 | ||
211 | writel(var->xoffset, fbi->regbase + WMT_GOVR_XPAN); | |
212 | writel(var->yoffset, fbi->regbase + WMT_GOVR_YPAN); | |
213 | return 0; | |
214 | } | |
215 | ||
216 | static int wm8505fb_blank(int blank, struct fb_info *info) | |
217 | { | |
218 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
219 | ||
220 | switch (blank) { | |
221 | case FB_BLANK_UNBLANK: | |
222 | wm8505fb_set_timing(info); | |
223 | break; | |
224 | default: | |
225 | writel(0, fbi->regbase + WMT_GOVR_TIMING_V_SYNC); | |
226 | break; | |
227 | } | |
228 | ||
229 | return 0; | |
230 | } | |
231 | ||
232 | static struct fb_ops wm8505fb_ops = { | |
233 | .owner = THIS_MODULE, | |
234 | .fb_set_par = wm8505fb_set_par, | |
235 | .fb_setcolreg = wm8505fb_setcolreg, | |
236 | .fb_fillrect = wmt_ge_fillrect, | |
237 | .fb_copyarea = wmt_ge_copyarea, | |
238 | .fb_imageblit = sys_imageblit, | |
239 | .fb_sync = wmt_ge_sync, | |
240 | .fb_pan_display = wm8505fb_pan_display, | |
241 | .fb_blank = wm8505fb_blank, | |
242 | }; | |
243 | ||
244 | static int __devinit wm8505fb_probe(struct platform_device *pdev) | |
245 | { | |
246 | struct wm8505fb_info *fbi; | |
247 | struct resource *res; | |
248 | void *addr; | |
249 | struct vt8500fb_platform_data *pdata; | |
250 | int ret; | |
251 | ||
252 | pdata = pdev->dev.platform_data; | |
253 | ||
254 | ret = -ENOMEM; | |
255 | fbi = NULL; | |
256 | ||
257 | fbi = kzalloc(sizeof(struct wm8505fb_info) + sizeof(u32) * 16, | |
258 | GFP_KERNEL); | |
259 | if (!fbi) { | |
260 | dev_err(&pdev->dev, "Failed to initialize framebuffer device\n"); | |
261 | ret = -ENOMEM; | |
262 | goto failed; | |
263 | } | |
264 | ||
265 | strcpy(fbi->fb.fix.id, DRIVER_NAME); | |
266 | ||
267 | fbi->fb.fix.type = FB_TYPE_PACKED_PIXELS; | |
268 | fbi->fb.fix.xpanstep = 1; | |
269 | fbi->fb.fix.ypanstep = 1; | |
270 | fbi->fb.fix.ywrapstep = 0; | |
271 | fbi->fb.fix.accel = FB_ACCEL_NONE; | |
272 | ||
273 | fbi->fb.fbops = &wm8505fb_ops; | |
274 | fbi->fb.flags = FBINFO_DEFAULT | |
275 | | FBINFO_HWACCEL_COPYAREA | |
276 | | FBINFO_HWACCEL_FILLRECT | |
277 | | FBINFO_HWACCEL_XPAN | |
278 | | FBINFO_HWACCEL_YPAN | |
279 | | FBINFO_VIRTFB | |
280 | | FBINFO_PARTIAL_PAN_OK; | |
281 | fbi->fb.node = -1; | |
282 | ||
283 | addr = fbi; | |
284 | addr = addr + sizeof(struct wm8505fb_info); | |
285 | fbi->fb.pseudo_palette = addr; | |
286 | ||
287 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
288 | if (res == NULL) { | |
289 | dev_err(&pdev->dev, "no I/O memory resource defined\n"); | |
290 | ret = -ENODEV; | |
291 | goto failed_fbi; | |
292 | } | |
293 | ||
a7f53284 | 294 | res = request_mem_region(res->start, resource_size(res), DRIVER_NAME); |
d6ff7d0f AC |
295 | if (res == NULL) { |
296 | dev_err(&pdev->dev, "failed to request I/O memory\n"); | |
297 | ret = -EBUSY; | |
298 | goto failed_fbi; | |
299 | } | |
300 | ||
301 | fbi->regbase = ioremap(res->start, resource_size(res)); | |
302 | if (fbi->regbase == NULL) { | |
303 | dev_err(&pdev->dev, "failed to map I/O memory\n"); | |
304 | ret = -EBUSY; | |
305 | goto failed_free_res; | |
306 | } | |
307 | ||
308 | fb_videomode_to_var(&fbi->fb.var, &pdata->mode); | |
309 | ||
310 | fbi->fb.var.nonstd = 0; | |
311 | fbi->fb.var.activate = FB_ACTIVATE_NOW; | |
312 | ||
313 | fbi->fb.var.height = -1; | |
314 | fbi->fb.var.width = -1; | |
315 | fbi->fb.var.xres_virtual = pdata->xres_virtual; | |
316 | fbi->fb.var.yres_virtual = pdata->yres_virtual; | |
317 | fbi->fb.var.bits_per_pixel = pdata->bpp; | |
318 | ||
319 | fbi->fb.fix.smem_start = pdata->video_mem_phys; | |
320 | fbi->fb.fix.smem_len = pdata->video_mem_len; | |
321 | fbi->fb.screen_base = pdata->video_mem_virt; | |
322 | fbi->fb.screen_size = pdata->video_mem_len; | |
323 | ||
324 | if (fb_alloc_cmap(&fbi->fb.cmap, 256, 0) < 0) { | |
325 | dev_err(&pdev->dev, "Failed to allocate color map\n"); | |
326 | ret = -ENOMEM; | |
327 | goto failed_free_io; | |
328 | } | |
329 | ||
330 | wm8505fb_init_hw(&fbi->fb); | |
331 | ||
332 | fbi->contrast = 0x80; | |
333 | ret = wm8505fb_set_par(&fbi->fb); | |
334 | if (ret) { | |
335 | dev_err(&pdev->dev, "Failed to set parameters\n"); | |
336 | goto failed_free_cmap; | |
337 | } | |
338 | ||
339 | platform_set_drvdata(pdev, fbi); | |
340 | ||
341 | ret = register_framebuffer(&fbi->fb); | |
342 | if (ret < 0) { | |
343 | dev_err(&pdev->dev, | |
344 | "Failed to register framebuffer device: %d\n", ret); | |
345 | goto failed_free_cmap; | |
346 | } | |
347 | ||
348 | ret = device_create_file(&pdev->dev, &dev_attr_contrast); | |
349 | if (ret < 0) { | |
350 | printk(KERN_WARNING "fb%d: failed to register attributes (%d)\n", | |
351 | fbi->fb.node, ret); | |
352 | } | |
353 | ||
354 | printk(KERN_INFO "fb%d: %s frame buffer at 0x%lx-0x%lx\n", | |
355 | fbi->fb.node, fbi->fb.fix.id, fbi->fb.fix.smem_start, | |
356 | fbi->fb.fix.smem_start + fbi->fb.fix.smem_len - 1); | |
357 | ||
358 | return 0; | |
359 | ||
360 | failed_free_cmap: | |
361 | if (fbi->fb.cmap.len) | |
362 | fb_dealloc_cmap(&fbi->fb.cmap); | |
363 | failed_free_io: | |
364 | iounmap(fbi->regbase); | |
365 | failed_free_res: | |
366 | release_mem_region(res->start, resource_size(res)); | |
367 | failed_fbi: | |
368 | platform_set_drvdata(pdev, NULL); | |
369 | kfree(fbi); | |
370 | failed: | |
371 | return ret; | |
372 | } | |
373 | ||
374 | static int __devexit wm8505fb_remove(struct platform_device *pdev) | |
375 | { | |
376 | struct wm8505fb_info *fbi = platform_get_drvdata(pdev); | |
377 | struct resource *res; | |
378 | ||
379 | device_remove_file(&pdev->dev, &dev_attr_contrast); | |
380 | ||
381 | unregister_framebuffer(&fbi->fb); | |
382 | ||
383 | writel(0, fbi->regbase); | |
384 | ||
385 | if (fbi->fb.cmap.len) | |
386 | fb_dealloc_cmap(&fbi->fb.cmap); | |
387 | ||
388 | iounmap(fbi->regbase); | |
389 | ||
390 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
391 | release_mem_region(res->start, resource_size(res)); | |
392 | ||
393 | kfree(fbi); | |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
398 | static struct platform_driver wm8505fb_driver = { | |
399 | .probe = wm8505fb_probe, | |
400 | .remove = __devexit_p(wm8505fb_remove), | |
401 | .driver = { | |
402 | .owner = THIS_MODULE, | |
403 | .name = DRIVER_NAME, | |
404 | }, | |
405 | }; | |
406 | ||
407 | static int __init wm8505fb_init(void) | |
408 | { | |
409 | return platform_driver_register(&wm8505fb_driver); | |
410 | } | |
411 | ||
412 | static void __exit wm8505fb_exit(void) | |
413 | { | |
414 | platform_driver_unregister(&wm8505fb_driver); | |
415 | } | |
416 | ||
417 | module_init(wm8505fb_init); | |
418 | module_exit(wm8505fb_exit); | |
419 | ||
420 | MODULE_AUTHOR("Ed Spiridonov <edo.rus@gmail.com>"); | |
421 | MODULE_DESCRIPTION("Framebuffer driver for WMT WM8505"); | |
422 | MODULE_LICENSE("GPL"); |