Commit | Line | Data |
---|---|---|
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 | ||
d6ff7d0f | 17 | #include <linux/delay.h> |
7ab0a484 | 18 | #include <linux/dma-mapping.h> |
d6ff7d0f | 19 | #include <linux/fb.h> |
7ab0a484 | 20 | #include <linux/errno.h> |
8e524c95 | 21 | #include <linux/err.h> |
d6ff7d0f AC |
22 | #include <linux/init.h> |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/io.h> | |
7ab0a484 TP |
25 | #include <linux/kernel.h> |
26 | #include <linux/memblock.h> | |
27 | #include <linux/mm.h> | |
28 | #include <linux/module.h> | |
e7b99537 TP |
29 | #include <linux/of.h> |
30 | #include <linux/of_fdt.h> | |
7ab0a484 TP |
31 | #include <linux/platform_device.h> |
32 | #include <linux/slab.h> | |
33 | #include <linux/string.h> | |
34 | #include <linux/wait.h> | |
35 | #include <video/of_display_timing.h> | |
d6ff7d0f | 36 | |
d6ff7d0f AC |
37 | #include "wm8505fb_regs.h" |
38 | #include "wmt_ge_rops.h" | |
39 | ||
40 | #define DRIVER_NAME "wm8505-fb" | |
41 | ||
42 | #define to_wm8505fb_info(__info) container_of(__info, \ | |
43 | struct wm8505fb_info, fb) | |
44 | struct wm8505fb_info { | |
45 | struct fb_info fb; | |
46 | void __iomem *regbase; | |
47 | unsigned int contrast; | |
48 | }; | |
49 | ||
50 | ||
51 | static int wm8505fb_init_hw(struct fb_info *info) | |
52 | { | |
53 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
54 | ||
55 | int i; | |
56 | ||
57 | /* I know the purpose only of few registers, so clear unknown */ | |
58 | for (i = 0; i < 0x200; i += 4) | |
59 | writel(0, fbi->regbase + i); | |
60 | ||
61 | /* Set frame buffer address */ | |
62 | writel(fbi->fb.fix.smem_start, fbi->regbase + WMT_GOVR_FBADDR); | |
63 | writel(fbi->fb.fix.smem_start, fbi->regbase + WMT_GOVR_FBADDR1); | |
64 | ||
e7b99537 TP |
65 | /* |
66 | * Set in-memory picture format to RGB | |
67 | * 0x31C sets the correct color mode (RGB565) for WM8650 | |
68 | * Bit 8+9 (0x300) are ignored on WM8505 as reserved | |
69 | */ | |
70 | writel(0x31c, fbi->regbase + WMT_GOVR_COLORSPACE); | |
d6ff7d0f AC |
71 | writel(1, fbi->regbase + WMT_GOVR_COLORSPACE1); |
72 | ||
73 | /* Virtual buffer size */ | |
74 | writel(info->var.xres, fbi->regbase + WMT_GOVR_XRES); | |
75 | writel(info->var.xres_virtual, fbi->regbase + WMT_GOVR_XRES_VIRTUAL); | |
76 | ||
77 | /* black magic ;) */ | |
78 | writel(0xf, fbi->regbase + WMT_GOVR_FHI); | |
79 | writel(4, fbi->regbase + WMT_GOVR_DVO_SET); | |
80 | writel(1, fbi->regbase + WMT_GOVR_MIF_ENABLE); | |
81 | writel(1, fbi->regbase + WMT_GOVR_REG_UPDATE); | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
86 | static int wm8505fb_set_timing(struct fb_info *info) | |
87 | { | |
88 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
89 | ||
90 | int h_start = info->var.left_margin; | |
91 | int h_end = h_start + info->var.xres; | |
92 | int h_all = h_end + info->var.right_margin; | |
93 | int h_sync = info->var.hsync_len; | |
94 | ||
95 | int v_start = info->var.upper_margin; | |
96 | int v_end = v_start + info->var.yres; | |
97 | int v_all = v_end + info->var.lower_margin; | |
623eb156 | 98 | int v_sync = info->var.vsync_len; |
d6ff7d0f AC |
99 | |
100 | writel(0, fbi->regbase + WMT_GOVR_TG); | |
101 | ||
102 | writel(h_start, fbi->regbase + WMT_GOVR_TIMING_H_START); | |
103 | writel(h_end, fbi->regbase + WMT_GOVR_TIMING_H_END); | |
104 | writel(h_all, fbi->regbase + WMT_GOVR_TIMING_H_ALL); | |
105 | writel(h_sync, fbi->regbase + WMT_GOVR_TIMING_H_SYNC); | |
106 | ||
107 | writel(v_start, fbi->regbase + WMT_GOVR_TIMING_V_START); | |
108 | writel(v_end, fbi->regbase + WMT_GOVR_TIMING_V_END); | |
109 | writel(v_all, fbi->regbase + WMT_GOVR_TIMING_V_ALL); | |
110 | writel(v_sync, fbi->regbase + WMT_GOVR_TIMING_V_SYNC); | |
111 | ||
112 | writel(1, fbi->regbase + WMT_GOVR_TG); | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
117 | ||
118 | static int wm8505fb_set_par(struct fb_info *info) | |
119 | { | |
120 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
121 | ||
122 | if (!fbi) | |
123 | return -EINVAL; | |
124 | ||
125 | if (info->var.bits_per_pixel == 32) { | |
126 | info->var.red.offset = 16; | |
127 | info->var.red.length = 8; | |
128 | info->var.red.msb_right = 0; | |
129 | info->var.green.offset = 8; | |
130 | info->var.green.length = 8; | |
131 | info->var.green.msb_right = 0; | |
132 | info->var.blue.offset = 0; | |
133 | info->var.blue.length = 8; | |
134 | info->var.blue.msb_right = 0; | |
135 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
136 | info->fix.line_length = info->var.xres_virtual << 2; | |
e7b99537 TP |
137 | } else if (info->var.bits_per_pixel == 16) { |
138 | info->var.red.offset = 11; | |
139 | info->var.red.length = 5; | |
140 | info->var.red.msb_right = 0; | |
141 | info->var.green.offset = 5; | |
142 | info->var.green.length = 6; | |
143 | info->var.green.msb_right = 0; | |
144 | info->var.blue.offset = 0; | |
145 | info->var.blue.length = 5; | |
146 | info->var.blue.msb_right = 0; | |
147 | info->fix.visual = FB_VISUAL_TRUECOLOR; | |
148 | info->fix.line_length = info->var.xres_virtual << 1; | |
d6ff7d0f AC |
149 | } |
150 | ||
151 | wm8505fb_set_timing(info); | |
152 | ||
153 | writel(fbi->contrast<<16 | fbi->contrast<<8 | fbi->contrast, | |
154 | fbi->regbase + WMT_GOVR_CONTRAST); | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
159 | static ssize_t contrast_show(struct device *dev, | |
160 | struct device_attribute *attr, char *buf) | |
161 | { | |
162 | struct fb_info *info = dev_get_drvdata(dev); | |
163 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
164 | ||
165 | return sprintf(buf, "%d\n", fbi->contrast); | |
166 | } | |
167 | ||
168 | static ssize_t contrast_store(struct device *dev, | |
169 | struct device_attribute *attr, | |
170 | const char *buf, size_t count) | |
171 | { | |
172 | struct fb_info *info = dev_get_drvdata(dev); | |
173 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
174 | unsigned long tmp; | |
175 | ||
f5725af5 | 176 | if (kstrtoul(buf, 10, &tmp) || (tmp > 0xff)) |
d6ff7d0f AC |
177 | return -EINVAL; |
178 | fbi->contrast = tmp; | |
179 | ||
180 | wm8505fb_set_par(info); | |
181 | ||
182 | return count; | |
183 | } | |
184 | ||
185 | static DEVICE_ATTR(contrast, 0644, contrast_show, contrast_store); | |
186 | ||
187 | static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf) | |
188 | { | |
189 | chan &= 0xffff; | |
190 | chan >>= 16 - bf->length; | |
191 | return chan << bf->offset; | |
192 | } | |
193 | ||
194 | static int wm8505fb_setcolreg(unsigned regno, unsigned red, unsigned green, | |
195 | unsigned blue, unsigned transp, | |
196 | struct fb_info *info) { | |
197 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
198 | int ret = 1; | |
199 | unsigned int val; | |
200 | if (regno >= 256) | |
201 | return -EINVAL; | |
202 | ||
203 | if (info->var.grayscale) | |
204 | red = green = blue = | |
205 | (19595 * red + 38470 * green + 7471 * blue) >> 16; | |
206 | ||
207 | switch (fbi->fb.fix.visual) { | |
208 | case FB_VISUAL_TRUECOLOR: | |
209 | if (regno < 16) { | |
210 | u32 *pal = info->pseudo_palette; | |
211 | ||
212 | val = chan_to_field(red, &fbi->fb.var.red); | |
213 | val |= chan_to_field(green, &fbi->fb.var.green); | |
214 | val |= chan_to_field(blue, &fbi->fb.var.blue); | |
215 | ||
216 | pal[regno] = val; | |
217 | ret = 0; | |
218 | } | |
219 | break; | |
220 | } | |
221 | ||
222 | return ret; | |
223 | } | |
224 | ||
225 | static int wm8505fb_pan_display(struct fb_var_screeninfo *var, | |
226 | struct fb_info *info) | |
227 | { | |
228 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
229 | ||
230 | writel(var->xoffset, fbi->regbase + WMT_GOVR_XPAN); | |
231 | writel(var->yoffset, fbi->regbase + WMT_GOVR_YPAN); | |
232 | return 0; | |
233 | } | |
234 | ||
235 | static int wm8505fb_blank(int blank, struct fb_info *info) | |
236 | { | |
237 | struct wm8505fb_info *fbi = to_wm8505fb_info(info); | |
238 | ||
239 | switch (blank) { | |
240 | case FB_BLANK_UNBLANK: | |
241 | wm8505fb_set_timing(info); | |
242 | break; | |
243 | default: | |
244 | writel(0, fbi->regbase + WMT_GOVR_TIMING_V_SYNC); | |
245 | break; | |
246 | } | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | static struct fb_ops wm8505fb_ops = { | |
252 | .owner = THIS_MODULE, | |
253 | .fb_set_par = wm8505fb_set_par, | |
254 | .fb_setcolreg = wm8505fb_setcolreg, | |
255 | .fb_fillrect = wmt_ge_fillrect, | |
256 | .fb_copyarea = wmt_ge_copyarea, | |
257 | .fb_imageblit = sys_imageblit, | |
258 | .fb_sync = wmt_ge_sync, | |
259 | .fb_pan_display = wm8505fb_pan_display, | |
260 | .fb_blank = wm8505fb_blank, | |
261 | }; | |
262 | ||
48c68c4f | 263 | static int wm8505fb_probe(struct platform_device *pdev) |
d6ff7d0f AC |
264 | { |
265 | struct wm8505fb_info *fbi; | |
7ab0a484 TP |
266 | struct resource *res; |
267 | struct display_timings *disp_timing; | |
d6ff7d0f | 268 | void *addr; |
d6ff7d0f AC |
269 | int ret; |
270 | ||
7ab0a484 | 271 | struct fb_videomode mode; |
e7b99537 TP |
272 | u32 bpp; |
273 | dma_addr_t fb_mem_phys; | |
274 | unsigned long fb_mem_len; | |
275 | void *fb_mem_virt; | |
d6ff7d0f | 276 | |
e7b99537 TP |
277 | fbi = devm_kzalloc(&pdev->dev, sizeof(struct wm8505fb_info) + |
278 | sizeof(u32) * 16, GFP_KERNEL); | |
d6ff7d0f AC |
279 | if (!fbi) { |
280 | dev_err(&pdev->dev, "Failed to initialize framebuffer device\n"); | |
9e340fdc | 281 | return -ENOMEM; |
d6ff7d0f AC |
282 | } |
283 | ||
284 | strcpy(fbi->fb.fix.id, DRIVER_NAME); | |
285 | ||
286 | fbi->fb.fix.type = FB_TYPE_PACKED_PIXELS; | |
287 | fbi->fb.fix.xpanstep = 1; | |
288 | fbi->fb.fix.ypanstep = 1; | |
289 | fbi->fb.fix.ywrapstep = 0; | |
290 | fbi->fb.fix.accel = FB_ACCEL_NONE; | |
291 | ||
292 | fbi->fb.fbops = &wm8505fb_ops; | |
293 | fbi->fb.flags = FBINFO_DEFAULT | |
294 | | FBINFO_HWACCEL_COPYAREA | |
295 | | FBINFO_HWACCEL_FILLRECT | |
296 | | FBINFO_HWACCEL_XPAN | |
297 | | FBINFO_HWACCEL_YPAN | |
298 | | FBINFO_VIRTFB | |
299 | | FBINFO_PARTIAL_PAN_OK; | |
300 | fbi->fb.node = -1; | |
301 | ||
302 | addr = fbi; | |
303 | addr = addr + sizeof(struct wm8505fb_info); | |
304 | fbi->fb.pseudo_palette = addr; | |
305 | ||
306 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
8e524c95 SK |
307 | fbi->regbase = devm_ioremap_resource(&pdev->dev, res); |
308 | if (IS_ERR(fbi->regbase)) | |
309 | return PTR_ERR(fbi->regbase); | |
d6ff7d0f | 310 | |
7ab0a484 TP |
311 | disp_timing = of_get_display_timings(pdev->dev.of_node); |
312 | if (!disp_timing) | |
9e340fdc | 313 | return -EINVAL; |
e7b99537 | 314 | |
7ab0a484 TP |
315 | ret = of_get_fb_videomode(pdev->dev.of_node, &mode, OF_USE_NATIVE_MODE); |
316 | if (ret) | |
317 | return ret; | |
318 | ||
319 | ret = of_property_read_u32(pdev->dev.of_node, "bits-per-pixel", &bpp); | |
320 | if (ret) | |
321 | return ret; | |
e7b99537 | 322 | |
7ab0a484 | 323 | fb_videomode_to_var(&fbi->fb.var, &mode); |
d6ff7d0f AC |
324 | |
325 | fbi->fb.var.nonstd = 0; | |
326 | fbi->fb.var.activate = FB_ACTIVATE_NOW; | |
327 | ||
328 | fbi->fb.var.height = -1; | |
329 | fbi->fb.var.width = -1; | |
d6ff7d0f | 330 | |
e7b99537 | 331 | /* try allocating the framebuffer */ |
7ab0a484 | 332 | fb_mem_len = mode.xres * mode.yres * 2 * (bpp / 8); |
9e340fdc | 333 | fb_mem_virt = dmam_alloc_coherent(&pdev->dev, fb_mem_len, &fb_mem_phys, |
e7b99537 TP |
334 | GFP_KERNEL); |
335 | if (!fb_mem_virt) { | |
336 | pr_err("%s: Failed to allocate framebuffer\n", __func__); | |
337 | return -ENOMEM; | |
9e340fdc | 338 | } |
e7b99537 | 339 | |
7ab0a484 TP |
340 | fbi->fb.var.xres_virtual = mode.xres; |
341 | fbi->fb.var.yres_virtual = mode.yres * 2; | |
e7b99537 TP |
342 | fbi->fb.var.bits_per_pixel = bpp; |
343 | ||
344 | fbi->fb.fix.smem_start = fb_mem_phys; | |
345 | fbi->fb.fix.smem_len = fb_mem_len; | |
346 | fbi->fb.screen_base = fb_mem_virt; | |
347 | fbi->fb.screen_size = fb_mem_len; | |
d6ff7d0f | 348 | |
de68efce | 349 | fbi->contrast = 0x10; |
d6ff7d0f AC |
350 | ret = wm8505fb_set_par(&fbi->fb); |
351 | if (ret) { | |
352 | dev_err(&pdev->dev, "Failed to set parameters\n"); | |
9e340fdc | 353 | return ret; |
d6ff7d0f AC |
354 | } |
355 | ||
9e340fdc JL |
356 | if (fb_alloc_cmap(&fbi->fb.cmap, 256, 0) < 0) { |
357 | dev_err(&pdev->dev, "Failed to allocate color map\n"); | |
358 | return -ENOMEM; | |
359 | } | |
360 | ||
361 | wm8505fb_init_hw(&fbi->fb); | |
362 | ||
d6ff7d0f AC |
363 | platform_set_drvdata(pdev, fbi); |
364 | ||
365 | ret = register_framebuffer(&fbi->fb); | |
366 | if (ret < 0) { | |
367 | dev_err(&pdev->dev, | |
368 | "Failed to register framebuffer device: %d\n", ret); | |
9e340fdc JL |
369 | if (fbi->fb.cmap.len) |
370 | fb_dealloc_cmap(&fbi->fb.cmap); | |
371 | return ret; | |
d6ff7d0f AC |
372 | } |
373 | ||
374 | ret = device_create_file(&pdev->dev, &dev_attr_contrast); | |
375 | if (ret < 0) { | |
376 | printk(KERN_WARNING "fb%d: failed to register attributes (%d)\n", | |
377 | fbi->fb.node, ret); | |
378 | } | |
379 | ||
380 | printk(KERN_INFO "fb%d: %s frame buffer at 0x%lx-0x%lx\n", | |
381 | fbi->fb.node, fbi->fb.fix.id, fbi->fb.fix.smem_start, | |
382 | fbi->fb.fix.smem_start + fbi->fb.fix.smem_len - 1); | |
383 | ||
384 | return 0; | |
d6ff7d0f AC |
385 | } |
386 | ||
48c68c4f | 387 | static int wm8505fb_remove(struct platform_device *pdev) |
d6ff7d0f AC |
388 | { |
389 | struct wm8505fb_info *fbi = platform_get_drvdata(pdev); | |
d6ff7d0f AC |
390 | |
391 | device_remove_file(&pdev->dev, &dev_attr_contrast); | |
392 | ||
393 | unregister_framebuffer(&fbi->fb); | |
394 | ||
395 | writel(0, fbi->regbase); | |
396 | ||
397 | if (fbi->fb.cmap.len) | |
398 | fb_dealloc_cmap(&fbi->fb.cmap); | |
399 | ||
d6ff7d0f AC |
400 | return 0; |
401 | } | |
402 | ||
e7b99537 TP |
403 | static const struct of_device_id wmt_dt_ids[] = { |
404 | { .compatible = "wm,wm8505-fb", }, | |
405 | {} | |
406 | }; | |
407 | ||
d6ff7d0f AC |
408 | static struct platform_driver wm8505fb_driver = { |
409 | .probe = wm8505fb_probe, | |
48c68c4f | 410 | .remove = wm8505fb_remove, |
d6ff7d0f AC |
411 | .driver = { |
412 | .owner = THIS_MODULE, | |
413 | .name = DRIVER_NAME, | |
e7b99537 | 414 | .of_match_table = of_match_ptr(wmt_dt_ids), |
d6ff7d0f AC |
415 | }, |
416 | }; | |
417 | ||
4277f2c4 | 418 | module_platform_driver(wm8505fb_driver); |
d6ff7d0f AC |
419 | |
420 | MODULE_AUTHOR("Ed Spiridonov <edo.rus@gmail.com>"); | |
421 | MODULE_DESCRIPTION("Framebuffer driver for WMT WM8505"); | |
e7b99537 TP |
422 | MODULE_LICENSE("GPL v2"); |
423 | MODULE_DEVICE_TABLE(of, wmt_dt_ids); |