Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 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 | |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 17 | #include <linux/delay.h> |
Tony Prisk | 7ab0a48 | 2013-04-03 07:20:38 +1300 | [diff] [blame] | 18 | #include <linux/dma-mapping.h> |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 19 | #include <linux/fb.h> |
Tony Prisk | 7ab0a48 | 2013-04-03 07:20:38 +1300 | [diff] [blame] | 20 | #include <linux/errno.h> |
Sachin Kamat | 8e524c9 | 2013-04-08 13:04:00 +0300 | [diff] [blame] | 21 | #include <linux/err.h> |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 22 | #include <linux/init.h> |
| 23 | #include <linux/interrupt.h> |
| 24 | #include <linux/io.h> |
Tony Prisk | 7ab0a48 | 2013-04-03 07:20:38 +1300 | [diff] [blame] | 25 | #include <linux/kernel.h> |
| 26 | #include <linux/memblock.h> |
| 27 | #include <linux/mm.h> |
| 28 | #include <linux/module.h> |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 29 | #include <linux/of.h> |
| 30 | #include <linux/of_fdt.h> |
Tony Prisk | 7ab0a48 | 2013-04-03 07:20:38 +1300 | [diff] [blame] | 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> |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 36 | |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 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 | |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 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); |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 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; |
Alexey Charkov | 623eb15 | 2010-12-20 16:09:57 +0300 | [diff] [blame] | 98 | int v_sync = info->var.vsync_len; |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 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; |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 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; |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 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 | |
| 176 | if (strict_strtoul(buf, 10, &tmp) || (tmp > 0xff)) |
| 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 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 263 | static int wm8505fb_probe(struct platform_device *pdev) |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 264 | { |
| 265 | struct wm8505fb_info *fbi; |
Tony Prisk | 7ab0a48 | 2013-04-03 07:20:38 +1300 | [diff] [blame] | 266 | struct resource *res; |
| 267 | struct display_timings *disp_timing; |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 268 | void *addr; |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 269 | int ret; |
| 270 | |
Tony Prisk | 7ab0a48 | 2013-04-03 07:20:38 +1300 | [diff] [blame] | 271 | struct fb_videomode mode; |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 272 | u32 bpp; |
| 273 | dma_addr_t fb_mem_phys; |
| 274 | unsigned long fb_mem_len; |
| 275 | void *fb_mem_virt; |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 276 | |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 277 | fbi = devm_kzalloc(&pdev->dev, sizeof(struct wm8505fb_info) + |
| 278 | sizeof(u32) * 16, GFP_KERNEL); |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 279 | if (!fbi) { |
| 280 | dev_err(&pdev->dev, "Failed to initialize framebuffer device\n"); |
Julia Lawall | 9e340fd | 2013-04-03 07:20:36 +1300 | [diff] [blame] | 281 | return -ENOMEM; |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 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); |
Sachin Kamat | 8e524c9 | 2013-04-08 13:04:00 +0300 | [diff] [blame] | 307 | fbi->regbase = devm_ioremap_resource(&pdev->dev, res); |
| 308 | if (IS_ERR(fbi->regbase)) |
| 309 | return PTR_ERR(fbi->regbase); |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 310 | |
Tony Prisk | 7ab0a48 | 2013-04-03 07:20:38 +1300 | [diff] [blame] | 311 | disp_timing = of_get_display_timings(pdev->dev.of_node); |
| 312 | if (!disp_timing) |
Julia Lawall | 9e340fd | 2013-04-03 07:20:36 +1300 | [diff] [blame] | 313 | return -EINVAL; |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 314 | |
Tony Prisk | 7ab0a48 | 2013-04-03 07:20:38 +1300 | [diff] [blame] | 315 | ret = of_get_fb_videomode(pdev->dev.of_node, &mode, OF_USE_NATIVE_MODE); |
| 316 | if (ret) |
| 317 | return ret; |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 318 | |
Tony Prisk | 7ab0a48 | 2013-04-03 07:20:38 +1300 | [diff] [blame] | 319 | ret = of_property_read_u32(pdev->dev.of_node, "bits-per-pixel", &bpp); |
| 320 | if (ret) |
| 321 | return ret; |
| 322 | |
| 323 | fb_videomode_to_var(&fbi->fb.var, &mode); |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 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; |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 330 | |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 331 | /* try allocating the framebuffer */ |
Tony Prisk | 7ab0a48 | 2013-04-03 07:20:38 +1300 | [diff] [blame] | 332 | fb_mem_len = mode.xres * mode.yres * 2 * (bpp / 8); |
Julia Lawall | 9e340fd | 2013-04-03 07:20:36 +1300 | [diff] [blame] | 333 | fb_mem_virt = dmam_alloc_coherent(&pdev->dev, fb_mem_len, &fb_mem_phys, |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 334 | GFP_KERNEL); |
| 335 | if (!fb_mem_virt) { |
| 336 | pr_err("%s: Failed to allocate framebuffer\n", __func__); |
| 337 | return -ENOMEM; |
Julia Lawall | 9e340fd | 2013-04-03 07:20:36 +1300 | [diff] [blame] | 338 | } |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 339 | |
Tony Prisk | 7ab0a48 | 2013-04-03 07:20:38 +1300 | [diff] [blame] | 340 | fbi->fb.var.xres_virtual = mode.xres; |
| 341 | fbi->fb.var.yres_virtual = mode.yres * 2; |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 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; |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 348 | |
Tony Prisk | de68efc | 2013-04-03 07:20:37 +1300 | [diff] [blame] | 349 | fbi->contrast = 0x10; |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 350 | ret = wm8505fb_set_par(&fbi->fb); |
| 351 | if (ret) { |
| 352 | dev_err(&pdev->dev, "Failed to set parameters\n"); |
Julia Lawall | 9e340fd | 2013-04-03 07:20:36 +1300 | [diff] [blame] | 353 | return ret; |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 354 | } |
| 355 | |
Julia Lawall | 9e340fd | 2013-04-03 07:20:36 +1300 | [diff] [blame] | 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 | |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 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); |
Julia Lawall | 9e340fd | 2013-04-03 07:20:36 +1300 | [diff] [blame] | 369 | if (fbi->fb.cmap.len) |
| 370 | fb_dealloc_cmap(&fbi->fb.cmap); |
| 371 | return ret; |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 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; |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 385 | } |
| 386 | |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 387 | static int wm8505fb_remove(struct platform_device *pdev) |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 388 | { |
| 389 | struct wm8505fb_info *fbi = platform_get_drvdata(pdev); |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 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 | |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 400 | return 0; |
| 401 | } |
| 402 | |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 403 | static const struct of_device_id wmt_dt_ids[] = { |
| 404 | { .compatible = "wm,wm8505-fb", }, |
| 405 | {} |
| 406 | }; |
| 407 | |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 408 | static struct platform_driver wm8505fb_driver = { |
| 409 | .probe = wm8505fb_probe, |
Greg Kroah-Hartman | 48c68c4 | 2012-12-21 13:07:39 -0800 | [diff] [blame] | 410 | .remove = wm8505fb_remove, |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 411 | .driver = { |
| 412 | .owner = THIS_MODULE, |
| 413 | .name = DRIVER_NAME, |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 414 | .of_match_table = of_match_ptr(wmt_dt_ids), |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 415 | }, |
| 416 | }; |
| 417 | |
Axel Lin | 4277f2c | 2011-11-26 10:25:54 +0800 | [diff] [blame] | 418 | module_platform_driver(wm8505fb_driver); |
Alexey Charkov | d6ff7d0 | 2010-11-09 02:42:39 +0300 | [diff] [blame] | 419 | |
| 420 | MODULE_AUTHOR("Ed Spiridonov <edo.rus@gmail.com>"); |
| 421 | MODULE_DESCRIPTION("Framebuffer driver for WMT WM8505"); |
Tony Prisk | e7b9953 | 2012-08-03 20:58:22 +1200 | [diff] [blame] | 422 | MODULE_LICENSE("GPL v2"); |
| 423 | MODULE_DEVICE_TABLE(of, wmt_dt_ids); |