Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 1 | /* linux/drivers/video/s3c-fb.c |
| 2 | * |
| 3 | * Copyright 2008 Openmoko Inc. |
| 4 | * Copyright 2008 Simtec Electronics |
| 5 | * Ben Dooks <ben@simtec.co.uk> |
| 6 | * http://armlinux.simtec.co.uk/ |
| 7 | * |
| 8 | * Samsung SoC Framebuffer driver |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/platform_device.h> |
| 18 | #include <linux/dma-mapping.h> |
| 19 | #include <linux/init.h> |
| 20 | #include <linux/gfp.h> |
| 21 | #include <linux/clk.h> |
| 22 | #include <linux/fb.h> |
| 23 | #include <linux/io.h> |
| 24 | |
| 25 | #include <mach/map.h> |
| 26 | #include <mach/regs-fb.h> |
| 27 | #include <plat/fb.h> |
| 28 | |
| 29 | /* This driver will export a number of framebuffer interfaces depending |
| 30 | * on the configuration passed in via the platform data. Each fb instance |
| 31 | * maps to a hardware window. Currently there is no support for runtime |
| 32 | * setting of the alpha-blending functions that each window has, so only |
| 33 | * window 0 is actually useful. |
| 34 | * |
| 35 | * Window 0 is treated specially, it is used for the basis of the LCD |
| 36 | * output timings and as the control for the output power-down state. |
| 37 | */ |
| 38 | |
| 39 | /* note, some of the functions that get called are derived from including |
| 40 | * <mach/regs-fb.h> as they are specific to the architecture that the code |
| 41 | * is being built for. |
| 42 | */ |
| 43 | |
| 44 | #ifdef CONFIG_FB_S3C_DEBUG_REGWRITE |
| 45 | #undef writel |
| 46 | #define writel(v, r) do { \ |
| 47 | printk(KERN_DEBUG "%s: %08x => %p\n", __func__, (unsigned int)v, r); \ |
| 48 | __raw_writel(v, r); } while(0) |
| 49 | #endif /* FB_S3C_DEBUG_REGWRITE */ |
| 50 | |
| 51 | struct s3c_fb; |
| 52 | |
| 53 | /** |
| 54 | * struct s3c_fb_win - per window private data for each framebuffer. |
| 55 | * @windata: The platform data supplied for the window configuration. |
| 56 | * @parent: The hardware that this window is part of. |
| 57 | * @fbinfo: Pointer pack to the framebuffer info for this window. |
| 58 | * @palette_buffer: Buffer/cache to hold palette entries. |
| 59 | * @pseudo_palette: For use in TRUECOLOUR modes for entries 0..15/ |
| 60 | * @index: The window number of this window. |
| 61 | * @palette: The bitfields for changing r/g/b into a hardware palette entry. |
| 62 | */ |
| 63 | struct s3c_fb_win { |
| 64 | struct s3c_fb_pd_win *windata; |
| 65 | struct s3c_fb *parent; |
| 66 | struct fb_info *fbinfo; |
| 67 | struct s3c_fb_palette palette; |
| 68 | |
| 69 | u32 *palette_buffer; |
| 70 | u32 pseudo_palette[16]; |
| 71 | unsigned int index; |
| 72 | }; |
| 73 | |
| 74 | /** |
| 75 | * struct s3c_fb - overall hardware state of the hardware |
| 76 | * @dev: The device that we bound to, for printing, etc. |
| 77 | * @regs_res: The resource we claimed for the IO registers. |
| 78 | * @bus_clk: The clk (hclk) feeding our interface and possibly pixclk. |
| 79 | * @regs: The mapped hardware registers. |
| 80 | * @enabled: A bitmask of enabled hardware windows. |
| 81 | * @pdata: The platform configuration data passed with the device. |
| 82 | * @windows: The hardware windows that have been claimed. |
| 83 | */ |
| 84 | struct s3c_fb { |
| 85 | struct device *dev; |
| 86 | struct resource *regs_res; |
| 87 | struct clk *bus_clk; |
| 88 | void __iomem *regs; |
| 89 | |
| 90 | unsigned char enabled; |
| 91 | |
| 92 | struct s3c_fb_platdata *pdata; |
| 93 | struct s3c_fb_win *windows[S3C_FB_MAX_WIN]; |
| 94 | }; |
| 95 | |
| 96 | /** |
| 97 | * s3c_fb_win_has_palette() - determine if a mode has a palette |
| 98 | * @win: The window number being queried. |
| 99 | * @bpp: The number of bits per pixel to test. |
| 100 | * |
| 101 | * Work out if the given window supports palletised data at the specified bpp. |
| 102 | */ |
| 103 | static int s3c_fb_win_has_palette(unsigned int win, unsigned int bpp) |
| 104 | { |
| 105 | return s3c_fb_win_pal_size(win) <= (1 << bpp); |
| 106 | } |
| 107 | |
| 108 | /** |
| 109 | * s3c_fb_check_var() - framebuffer layer request to verify a given mode. |
| 110 | * @var: The screen information to verify. |
| 111 | * @info: The framebuffer device. |
| 112 | * |
| 113 | * Framebuffer layer call to verify the given information and allow us to |
| 114 | * update various information depending on the hardware capabilities. |
| 115 | */ |
| 116 | static int s3c_fb_check_var(struct fb_var_screeninfo *var, |
| 117 | struct fb_info *info) |
| 118 | { |
| 119 | struct s3c_fb_win *win = info->par; |
| 120 | struct s3c_fb_pd_win *windata = win->windata; |
| 121 | struct s3c_fb *sfb = win->parent; |
| 122 | |
| 123 | dev_dbg(sfb->dev, "checking parameters\n"); |
| 124 | |
| 125 | var->xres_virtual = max((unsigned int)windata->virtual_x, var->xres); |
| 126 | var->yres_virtual = max((unsigned int)windata->virtual_y, var->yres); |
| 127 | |
| 128 | if (!s3c_fb_validate_win_bpp(win->index, var->bits_per_pixel)) { |
| 129 | dev_dbg(sfb->dev, "win %d: unsupported bpp %d\n", |
| 130 | win->index, var->bits_per_pixel); |
| 131 | return -EINVAL; |
| 132 | } |
| 133 | |
| 134 | /* always ensure these are zero, for drop through cases below */ |
| 135 | var->transp.offset = 0; |
| 136 | var->transp.length = 0; |
| 137 | |
| 138 | switch (var->bits_per_pixel) { |
| 139 | case 1: |
| 140 | case 2: |
| 141 | case 4: |
| 142 | case 8: |
| 143 | if (!s3c_fb_win_has_palette(win->index, var->bits_per_pixel)) { |
| 144 | /* non palletised, A:1,R:2,G:3,B:2 mode */ |
| 145 | var->red.offset = 4; |
| 146 | var->green.offset = 2; |
| 147 | var->blue.offset = 0; |
| 148 | var->red.length = 5; |
| 149 | var->green.length = 3; |
| 150 | var->blue.length = 2; |
| 151 | var->transp.offset = 7; |
| 152 | var->transp.length = 1; |
| 153 | } else { |
| 154 | var->red.offset = 0; |
| 155 | var->red.length = var->bits_per_pixel; |
| 156 | var->green = var->red; |
| 157 | var->blue = var->red; |
| 158 | } |
| 159 | break; |
| 160 | |
| 161 | case 19: |
| 162 | /* 666 with one bit alpha/transparency */ |
| 163 | var->transp.offset = 18; |
| 164 | var->transp.length = 1; |
| 165 | case 18: |
| 166 | var->bits_per_pixel = 32; |
| 167 | |
| 168 | /* 666 format */ |
| 169 | var->red.offset = 12; |
| 170 | var->green.offset = 6; |
| 171 | var->blue.offset = 0; |
| 172 | var->red.length = 6; |
| 173 | var->green.length = 6; |
| 174 | var->blue.length = 6; |
| 175 | break; |
| 176 | |
| 177 | case 16: |
| 178 | /* 16 bpp, 565 format */ |
| 179 | var->red.offset = 11; |
| 180 | var->green.offset = 5; |
| 181 | var->blue.offset = 0; |
| 182 | var->red.length = 5; |
| 183 | var->green.length = 6; |
| 184 | var->blue.length = 5; |
| 185 | break; |
| 186 | |
| 187 | case 28: |
| 188 | case 25: |
| 189 | var->transp.length = var->bits_per_pixel - 24; |
| 190 | var->transp.offset = 24; |
| 191 | /* drop through */ |
| 192 | case 24: |
| 193 | /* our 24bpp is unpacked, so 32bpp */ |
| 194 | var->bits_per_pixel = 32; |
| 195 | case 32: |
| 196 | var->red.offset = 16; |
| 197 | var->red.length = 8; |
| 198 | var->green.offset = 8; |
| 199 | var->green.length = 8; |
| 200 | var->blue.offset = 0; |
| 201 | var->blue.length = 8; |
| 202 | break; |
| 203 | |
| 204 | default: |
| 205 | dev_err(sfb->dev, "invalid bpp\n"); |
| 206 | } |
| 207 | |
| 208 | dev_dbg(sfb->dev, "%s: verified parameters\n", __func__); |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | /** |
| 213 | * s3c_fb_calc_pixclk() - calculate the divider to create the pixel clock. |
InKi Dae | 600ce1a | 2009-07-05 12:08:21 -0700 | [diff] [blame] | 214 | * @id: window id. |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 215 | * @sfb: The hardware state. |
| 216 | * @pixclock: The pixel clock wanted, in picoseconds. |
| 217 | * |
| 218 | * Given the specified pixel clock, work out the necessary divider to get |
| 219 | * close to the output frequency. |
| 220 | */ |
InKi Dae | 600ce1a | 2009-07-05 12:08:21 -0700 | [diff] [blame] | 221 | static int s3c_fb_calc_pixclk(unsigned char id, struct s3c_fb *sfb, unsigned int pixclk) |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 222 | { |
InKi Dae | 600ce1a | 2009-07-05 12:08:21 -0700 | [diff] [blame] | 223 | struct s3c_fb_pd_win *win = sfb->pdata->win[id]; |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 224 | unsigned long clk = clk_get_rate(sfb->bus_clk); |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 225 | unsigned int result; |
| 226 | |
InKi Dae | 600ce1a | 2009-07-05 12:08:21 -0700 | [diff] [blame] | 227 | pixclk *= win->win_mode.refresh; |
| 228 | result = clk / pixclk; |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 229 | |
| 230 | dev_dbg(sfb->dev, "pixclk=%u, clk=%lu, div=%d (%lu)\n", |
| 231 | pixclk, clk, result, clk / result); |
| 232 | |
| 233 | return result; |
| 234 | } |
| 235 | |
| 236 | /** |
| 237 | * s3c_fb_align_word() - align pixel count to word boundary |
| 238 | * @bpp: The number of bits per pixel |
| 239 | * @pix: The value to be aligned. |
| 240 | * |
| 241 | * Align the given pixel count so that it will start on an 32bit word |
| 242 | * boundary. |
| 243 | */ |
| 244 | static int s3c_fb_align_word(unsigned int bpp, unsigned int pix) |
| 245 | { |
| 246 | int pix_per_word; |
| 247 | |
| 248 | if (bpp > 16) |
| 249 | return pix; |
| 250 | |
| 251 | pix_per_word = (8 * 32) / bpp; |
| 252 | return ALIGN(pix, pix_per_word); |
| 253 | } |
| 254 | |
| 255 | /** |
| 256 | * s3c_fb_set_par() - framebuffer request to set new framebuffer state. |
| 257 | * @info: The framebuffer to change. |
| 258 | * |
| 259 | * Framebuffer layer request to set a new mode for the specified framebuffer |
| 260 | */ |
| 261 | static int s3c_fb_set_par(struct fb_info *info) |
| 262 | { |
| 263 | struct fb_var_screeninfo *var = &info->var; |
| 264 | struct s3c_fb_win *win = info->par; |
| 265 | struct s3c_fb *sfb = win->parent; |
| 266 | void __iomem *regs = sfb->regs; |
| 267 | int win_no = win->index; |
InKi Dae | 600ce1a | 2009-07-05 12:08:21 -0700 | [diff] [blame] | 268 | u32 osdc_data = 0; |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 269 | u32 data; |
| 270 | u32 pagewidth; |
| 271 | int clkdiv; |
| 272 | |
| 273 | dev_dbg(sfb->dev, "setting framebuffer parameters\n"); |
| 274 | |
| 275 | switch (var->bits_per_pixel) { |
| 276 | case 32: |
| 277 | case 24: |
| 278 | case 16: |
| 279 | case 12: |
| 280 | info->fix.visual = FB_VISUAL_TRUECOLOR; |
| 281 | break; |
| 282 | case 8: |
| 283 | if (s3c_fb_win_has_palette(win_no, 8)) |
| 284 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
| 285 | else |
| 286 | info->fix.visual = FB_VISUAL_TRUECOLOR; |
| 287 | break; |
| 288 | case 1: |
| 289 | info->fix.visual = FB_VISUAL_MONO01; |
| 290 | break; |
| 291 | default: |
| 292 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
| 293 | break; |
| 294 | } |
| 295 | |
| 296 | info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8; |
| 297 | |
| 298 | /* disable the window whilst we update it */ |
| 299 | writel(0, regs + WINCON(win_no)); |
| 300 | |
| 301 | /* use window 0 as the basis for the lcd output timings */ |
| 302 | |
| 303 | if (win_no == 0) { |
InKi Dae | 600ce1a | 2009-07-05 12:08:21 -0700 | [diff] [blame] | 304 | clkdiv = s3c_fb_calc_pixclk(win_no, sfb, var->pixclock); |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 305 | |
| 306 | data = sfb->pdata->vidcon0; |
| 307 | data &= ~(VIDCON0_CLKVAL_F_MASK | VIDCON0_CLKDIR); |
| 308 | |
| 309 | if (clkdiv > 1) |
| 310 | data |= VIDCON0_CLKVAL_F(clkdiv-1) | VIDCON0_CLKDIR; |
| 311 | else |
| 312 | data &= ~VIDCON0_CLKDIR; /* 1:1 clock */ |
| 313 | |
| 314 | /* write the timing data to the panel */ |
| 315 | |
| 316 | data |= VIDCON0_ENVID | VIDCON0_ENVID_F; |
| 317 | writel(data, regs + VIDCON0); |
| 318 | |
| 319 | data = VIDTCON0_VBPD(var->upper_margin - 1) | |
| 320 | VIDTCON0_VFPD(var->lower_margin - 1) | |
| 321 | VIDTCON0_VSPW(var->vsync_len - 1); |
| 322 | |
| 323 | writel(data, regs + VIDTCON0); |
| 324 | |
| 325 | data = VIDTCON1_HBPD(var->left_margin - 1) | |
| 326 | VIDTCON1_HFPD(var->right_margin - 1) | |
| 327 | VIDTCON1_HSPW(var->hsync_len - 1); |
| 328 | |
| 329 | writel(data, regs + VIDTCON1); |
| 330 | |
| 331 | data = VIDTCON2_LINEVAL(var->yres - 1) | |
| 332 | VIDTCON2_HOZVAL(var->xres - 1); |
| 333 | writel(data, regs + VIDTCON2); |
| 334 | } |
| 335 | |
| 336 | /* write the buffer address */ |
| 337 | |
| 338 | writel(info->fix.smem_start, regs + VIDW_BUF_START(win_no)); |
| 339 | |
| 340 | data = info->fix.smem_start + info->fix.line_length * var->yres; |
| 341 | writel(data, regs + VIDW_BUF_END(win_no)); |
| 342 | |
| 343 | pagewidth = (var->xres * var->bits_per_pixel) >> 3; |
| 344 | data = VIDW_BUF_SIZE_OFFSET(info->fix.line_length - pagewidth) | |
| 345 | VIDW_BUF_SIZE_PAGEWIDTH(pagewidth); |
| 346 | writel(data, regs + VIDW_BUF_SIZE(win_no)); |
| 347 | |
| 348 | /* write 'OSD' registers to control position of framebuffer */ |
| 349 | |
| 350 | data = VIDOSDxA_TOPLEFT_X(0) | VIDOSDxA_TOPLEFT_Y(0); |
| 351 | writel(data, regs + VIDOSD_A(win_no)); |
| 352 | |
| 353 | data = VIDOSDxB_BOTRIGHT_X(s3c_fb_align_word(var->bits_per_pixel, |
| 354 | var->xres - 1)) | |
| 355 | VIDOSDxB_BOTRIGHT_Y(var->yres - 1); |
| 356 | |
| 357 | writel(data, regs + VIDOSD_B(win_no)); |
| 358 | |
| 359 | data = var->xres * var->yres; |
InKi Dae | 39000d6 | 2009-06-16 15:34:27 -0700 | [diff] [blame] | 360 | |
InKi Dae | 39000d6 | 2009-06-16 15:34:27 -0700 | [diff] [blame] | 361 | osdc_data = VIDISD14C_ALPHA1_R(0xf) | |
| 362 | VIDISD14C_ALPHA1_G(0xf) | |
| 363 | VIDISD14C_ALPHA1_B(0xf); |
| 364 | |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 365 | if (s3c_fb_has_osd_d(win_no)) { |
| 366 | writel(data, regs + VIDOSD_D(win_no)); |
InKi Dae | 39000d6 | 2009-06-16 15:34:27 -0700 | [diff] [blame] | 367 | writel(osdc_data, regs + VIDOSD_C(win_no)); |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 368 | } else |
| 369 | writel(data, regs + VIDOSD_C(win_no)); |
| 370 | |
| 371 | data = WINCONx_ENWIN; |
| 372 | |
| 373 | /* note, since we have to round up the bits-per-pixel, we end up |
| 374 | * relying on the bitfield information for r/g/b/a to work out |
| 375 | * exactly which mode of operation is intended. */ |
| 376 | |
| 377 | switch (var->bits_per_pixel) { |
| 378 | case 1: |
| 379 | data |= WINCON0_BPPMODE_1BPP; |
| 380 | data |= WINCONx_BITSWP; |
| 381 | data |= WINCONx_BURSTLEN_4WORD; |
| 382 | break; |
| 383 | case 2: |
| 384 | data |= WINCON0_BPPMODE_2BPP; |
| 385 | data |= WINCONx_BITSWP; |
| 386 | data |= WINCONx_BURSTLEN_8WORD; |
| 387 | break; |
| 388 | case 4: |
| 389 | data |= WINCON0_BPPMODE_4BPP; |
| 390 | data |= WINCONx_BITSWP; |
| 391 | data |= WINCONx_BURSTLEN_8WORD; |
| 392 | break; |
| 393 | case 8: |
| 394 | if (var->transp.length != 0) |
| 395 | data |= WINCON1_BPPMODE_8BPP_1232; |
| 396 | else |
| 397 | data |= WINCON0_BPPMODE_8BPP_PALETTE; |
| 398 | data |= WINCONx_BURSTLEN_8WORD; |
| 399 | data |= WINCONx_BYTSWP; |
| 400 | break; |
| 401 | case 16: |
| 402 | if (var->transp.length != 0) |
| 403 | data |= WINCON1_BPPMODE_16BPP_A1555; |
| 404 | else |
| 405 | data |= WINCON0_BPPMODE_16BPP_565; |
| 406 | data |= WINCONx_HAWSWP; |
| 407 | data |= WINCONx_BURSTLEN_16WORD; |
| 408 | break; |
| 409 | case 24: |
| 410 | case 32: |
| 411 | if (var->red.length == 6) { |
| 412 | if (var->transp.length != 0) |
| 413 | data |= WINCON1_BPPMODE_19BPP_A1666; |
| 414 | else |
| 415 | data |= WINCON1_BPPMODE_18BPP_666; |
InKi Dae | 39000d6 | 2009-06-16 15:34:27 -0700 | [diff] [blame] | 416 | } else if (var->transp.length == 1) |
| 417 | data |= WINCON1_BPPMODE_25BPP_A1888 |
| 418 | | WINCON1_BLD_PIX; |
| 419 | else if (var->transp.length == 4) |
| 420 | data |= WINCON1_BPPMODE_28BPP_A4888 |
| 421 | | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL; |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 422 | else |
| 423 | data |= WINCON0_BPPMODE_24BPP_888; |
| 424 | |
| 425 | data |= WINCONx_BURSTLEN_16WORD; |
| 426 | break; |
| 427 | } |
| 428 | |
InKi Dae | 39000d6 | 2009-06-16 15:34:27 -0700 | [diff] [blame] | 429 | /* It has no color key control register for window0 */ |
| 430 | if (win_no > 0) { |
| 431 | u32 keycon0_data = 0, keycon1_data = 0; |
| 432 | |
| 433 | keycon0_data = ~(WxKEYCON0_KEYBL_EN | |
| 434 | WxKEYCON0_KEYEN_F | |
| 435 | WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0); |
| 436 | |
| 437 | keycon1_data = WxKEYCON1_COLVAL(0xffffff); |
| 438 | |
| 439 | writel(keycon0_data, regs + WxKEYCONy(win_no-1, 0)); |
| 440 | writel(keycon1_data, regs + WxKEYCONy(win_no-1, 1)); |
| 441 | } |
| 442 | |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 443 | writel(data, regs + WINCON(win_no)); |
| 444 | writel(0x0, regs + WINxMAP(win_no)); |
| 445 | |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | /** |
| 450 | * s3c_fb_update_palette() - set or schedule a palette update. |
| 451 | * @sfb: The hardware information. |
| 452 | * @win: The window being updated. |
| 453 | * @reg: The palette index being changed. |
| 454 | * @value: The computed palette value. |
| 455 | * |
| 456 | * Change the value of a palette register, either by directly writing to |
| 457 | * the palette (this requires the palette RAM to be disconnected from the |
| 458 | * hardware whilst this is in progress) or schedule the update for later. |
| 459 | * |
| 460 | * At the moment, since we have no VSYNC interrupt support, we simply set |
| 461 | * the palette entry directly. |
| 462 | */ |
| 463 | static void s3c_fb_update_palette(struct s3c_fb *sfb, |
| 464 | struct s3c_fb_win *win, |
| 465 | unsigned int reg, |
| 466 | u32 value) |
| 467 | { |
| 468 | void __iomem *palreg; |
| 469 | u32 palcon; |
| 470 | |
| 471 | palreg = sfb->regs + s3c_fb_pal_reg(win->index, reg); |
| 472 | |
| 473 | dev_dbg(sfb->dev, "%s: win %d, reg %d (%p): %08x\n", |
| 474 | __func__, win->index, reg, palreg, value); |
| 475 | |
| 476 | win->palette_buffer[reg] = value; |
| 477 | |
| 478 | palcon = readl(sfb->regs + WPALCON); |
| 479 | writel(palcon | WPALCON_PAL_UPDATE, sfb->regs + WPALCON); |
| 480 | |
| 481 | if (s3c_fb_pal_is16(win->index)) |
| 482 | writew(value, palreg); |
| 483 | else |
| 484 | writel(value, palreg); |
| 485 | |
| 486 | writel(palcon, sfb->regs + WPALCON); |
| 487 | } |
| 488 | |
| 489 | static inline unsigned int chan_to_field(unsigned int chan, |
| 490 | struct fb_bitfield *bf) |
| 491 | { |
| 492 | chan &= 0xffff; |
| 493 | chan >>= 16 - bf->length; |
| 494 | return chan << bf->offset; |
| 495 | } |
| 496 | |
| 497 | /** |
| 498 | * s3c_fb_setcolreg() - framebuffer layer request to change palette. |
| 499 | * @regno: The palette index to change. |
| 500 | * @red: The red field for the palette data. |
| 501 | * @green: The green field for the palette data. |
| 502 | * @blue: The blue field for the palette data. |
| 503 | * @trans: The transparency (alpha) field for the palette data. |
| 504 | * @info: The framebuffer being changed. |
| 505 | */ |
| 506 | static int s3c_fb_setcolreg(unsigned regno, |
| 507 | unsigned red, unsigned green, unsigned blue, |
| 508 | unsigned transp, struct fb_info *info) |
| 509 | { |
| 510 | struct s3c_fb_win *win = info->par; |
| 511 | struct s3c_fb *sfb = win->parent; |
| 512 | unsigned int val; |
| 513 | |
| 514 | dev_dbg(sfb->dev, "%s: win %d: %d => rgb=%d/%d/%d\n", |
| 515 | __func__, win->index, regno, red, green, blue); |
| 516 | |
| 517 | switch (info->fix.visual) { |
| 518 | case FB_VISUAL_TRUECOLOR: |
| 519 | /* true-colour, use pseudo-palette */ |
| 520 | |
| 521 | if (regno < 16) { |
| 522 | u32 *pal = info->pseudo_palette; |
| 523 | |
| 524 | val = chan_to_field(red, &info->var.red); |
| 525 | val |= chan_to_field(green, &info->var.green); |
| 526 | val |= chan_to_field(blue, &info->var.blue); |
| 527 | |
| 528 | pal[regno] = val; |
| 529 | } |
| 530 | break; |
| 531 | |
| 532 | case FB_VISUAL_PSEUDOCOLOR: |
| 533 | if (regno < s3c_fb_win_pal_size(win->index)) { |
| 534 | val = chan_to_field(red, &win->palette.r); |
| 535 | val |= chan_to_field(green, &win->palette.g); |
| 536 | val |= chan_to_field(blue, &win->palette.b); |
| 537 | |
| 538 | s3c_fb_update_palette(sfb, win, regno, val); |
| 539 | } |
| 540 | |
| 541 | break; |
| 542 | |
| 543 | default: |
| 544 | return 1; /* unknown type */ |
| 545 | } |
| 546 | |
| 547 | return 0; |
| 548 | } |
| 549 | |
| 550 | /** |
| 551 | * s3c_fb_enable() - Set the state of the main LCD output |
| 552 | * @sfb: The main framebuffer state. |
| 553 | * @enable: The state to set. |
| 554 | */ |
| 555 | static void s3c_fb_enable(struct s3c_fb *sfb, int enable) |
| 556 | { |
| 557 | u32 vidcon0 = readl(sfb->regs + VIDCON0); |
| 558 | |
| 559 | if (enable) |
| 560 | vidcon0 |= VIDCON0_ENVID | VIDCON0_ENVID_F; |
| 561 | else { |
| 562 | /* see the note in the framebuffer datasheet about |
| 563 | * why you cannot take both of these bits down at the |
| 564 | * same time. */ |
| 565 | |
| 566 | if (!(vidcon0 & VIDCON0_ENVID)) |
| 567 | return; |
| 568 | |
| 569 | vidcon0 |= VIDCON0_ENVID; |
| 570 | vidcon0 &= ~VIDCON0_ENVID_F; |
| 571 | } |
| 572 | |
| 573 | writel(vidcon0, sfb->regs + VIDCON0); |
| 574 | } |
| 575 | |
| 576 | /** |
| 577 | * s3c_fb_blank() - blank or unblank the given window |
| 578 | * @blank_mode: The blank state from FB_BLANK_* |
| 579 | * @info: The framebuffer to blank. |
| 580 | * |
| 581 | * Framebuffer layer request to change the power state. |
| 582 | */ |
| 583 | static int s3c_fb_blank(int blank_mode, struct fb_info *info) |
| 584 | { |
| 585 | struct s3c_fb_win *win = info->par; |
| 586 | struct s3c_fb *sfb = win->parent; |
| 587 | unsigned int index = win->index; |
| 588 | u32 wincon; |
| 589 | |
| 590 | dev_dbg(sfb->dev, "blank mode %d\n", blank_mode); |
| 591 | |
| 592 | wincon = readl(sfb->regs + WINCON(index)); |
| 593 | |
| 594 | switch (blank_mode) { |
| 595 | case FB_BLANK_POWERDOWN: |
| 596 | wincon &= ~WINCONx_ENWIN; |
| 597 | sfb->enabled &= ~(1 << index); |
| 598 | /* fall through to FB_BLANK_NORMAL */ |
| 599 | |
| 600 | case FB_BLANK_NORMAL: |
| 601 | /* disable the DMA and display 0x0 (black) */ |
| 602 | writel(WINxMAP_MAP | WINxMAP_MAP_COLOUR(0x0), |
| 603 | sfb->regs + WINxMAP(index)); |
| 604 | break; |
| 605 | |
| 606 | case FB_BLANK_UNBLANK: |
| 607 | writel(0x0, sfb->regs + WINxMAP(index)); |
| 608 | wincon |= WINCONx_ENWIN; |
| 609 | sfb->enabled |= (1 << index); |
| 610 | break; |
| 611 | |
| 612 | case FB_BLANK_VSYNC_SUSPEND: |
| 613 | case FB_BLANK_HSYNC_SUSPEND: |
| 614 | default: |
| 615 | return 1; |
| 616 | } |
| 617 | |
| 618 | writel(wincon, sfb->regs + WINCON(index)); |
| 619 | |
| 620 | /* Check the enabled state to see if we need to be running the |
| 621 | * main LCD interface, as if there are no active windows then |
| 622 | * it is highly likely that we also do not need to output |
| 623 | * anything. |
| 624 | */ |
| 625 | |
| 626 | /* We could do something like the following code, but the current |
| 627 | * system of using framebuffer events means that we cannot make |
| 628 | * the distinction between just window 0 being inactive and all |
| 629 | * the windows being down. |
| 630 | * |
| 631 | * s3c_fb_enable(sfb, sfb->enabled ? 1 : 0); |
| 632 | */ |
| 633 | |
| 634 | /* we're stuck with this until we can do something about overriding |
| 635 | * the power control using the blanking event for a single fb. |
| 636 | */ |
| 637 | if (index == 0) |
| 638 | s3c_fb_enable(sfb, blank_mode != FB_BLANK_POWERDOWN ? 1 : 0); |
| 639 | |
| 640 | return 0; |
| 641 | } |
| 642 | |
| 643 | static struct fb_ops s3c_fb_ops = { |
| 644 | .owner = THIS_MODULE, |
| 645 | .fb_check_var = s3c_fb_check_var, |
| 646 | .fb_set_par = s3c_fb_set_par, |
| 647 | .fb_blank = s3c_fb_blank, |
| 648 | .fb_setcolreg = s3c_fb_setcolreg, |
| 649 | .fb_fillrect = cfb_fillrect, |
| 650 | .fb_copyarea = cfb_copyarea, |
| 651 | .fb_imageblit = cfb_imageblit, |
| 652 | }; |
| 653 | |
| 654 | /** |
| 655 | * s3c_fb_alloc_memory() - allocate display memory for framebuffer window |
| 656 | * @sfb: The base resources for the hardware. |
| 657 | * @win: The window to initialise memory for. |
| 658 | * |
| 659 | * Allocate memory for the given framebuffer. |
| 660 | */ |
| 661 | static int __devinit s3c_fb_alloc_memory(struct s3c_fb *sfb, |
| 662 | struct s3c_fb_win *win) |
| 663 | { |
| 664 | struct s3c_fb_pd_win *windata = win->windata; |
| 665 | unsigned int real_size, virt_size, size; |
| 666 | struct fb_info *fbi = win->fbinfo; |
| 667 | dma_addr_t map_dma; |
| 668 | |
| 669 | dev_dbg(sfb->dev, "allocating memory for display\n"); |
| 670 | |
| 671 | real_size = windata->win_mode.xres * windata->win_mode.yres; |
| 672 | virt_size = windata->virtual_x * windata->virtual_y; |
| 673 | |
| 674 | dev_dbg(sfb->dev, "real_size=%u (%u.%u), virt_size=%u (%u.%u)\n", |
| 675 | real_size, windata->win_mode.xres, windata->win_mode.yres, |
| 676 | virt_size, windata->virtual_x, windata->virtual_y); |
| 677 | |
| 678 | size = (real_size > virt_size) ? real_size : virt_size; |
| 679 | size *= (windata->max_bpp > 16) ? 32 : windata->max_bpp; |
| 680 | size /= 8; |
| 681 | |
| 682 | fbi->fix.smem_len = size; |
| 683 | size = PAGE_ALIGN(size); |
| 684 | |
| 685 | dev_dbg(sfb->dev, "want %u bytes for window\n", size); |
| 686 | |
| 687 | fbi->screen_base = dma_alloc_writecombine(sfb->dev, size, |
| 688 | &map_dma, GFP_KERNEL); |
| 689 | if (!fbi->screen_base) |
| 690 | return -ENOMEM; |
| 691 | |
| 692 | dev_dbg(sfb->dev, "mapped %x to %p\n", |
| 693 | (unsigned int)map_dma, fbi->screen_base); |
| 694 | |
| 695 | memset(fbi->screen_base, 0x0, size); |
| 696 | fbi->fix.smem_start = map_dma; |
| 697 | |
| 698 | return 0; |
| 699 | } |
| 700 | |
| 701 | /** |
| 702 | * s3c_fb_free_memory() - free the display memory for the given window |
| 703 | * @sfb: The base resources for the hardware. |
| 704 | * @win: The window to free the display memory for. |
| 705 | * |
| 706 | * Free the display memory allocated by s3c_fb_alloc_memory(). |
| 707 | */ |
| 708 | static void s3c_fb_free_memory(struct s3c_fb *sfb, struct s3c_fb_win *win) |
| 709 | { |
| 710 | struct fb_info *fbi = win->fbinfo; |
| 711 | |
| 712 | dma_free_writecombine(sfb->dev, PAGE_ALIGN(fbi->fix.smem_len), |
| 713 | fbi->screen_base, fbi->fix.smem_start); |
| 714 | } |
| 715 | |
| 716 | /** |
| 717 | * s3c_fb_release_win() - release resources for a framebuffer window. |
| 718 | * @win: The window to cleanup the resources for. |
| 719 | * |
| 720 | * Release the resources that where claimed for the hardware window, |
| 721 | * such as the framebuffer instance and any memory claimed for it. |
| 722 | */ |
| 723 | static void s3c_fb_release_win(struct s3c_fb *sfb, struct s3c_fb_win *win) |
| 724 | { |
Krzysztof Helt | ddc518d | 2009-06-16 15:34:33 -0700 | [diff] [blame] | 725 | if (win->fbinfo) { |
| 726 | unregister_framebuffer(win->fbinfo); |
| 727 | fb_dealloc_cmap(&win->fbinfo->cmap); |
| 728 | s3c_fb_free_memory(sfb, win); |
| 729 | framebuffer_release(win->fbinfo); |
| 730 | } |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 731 | } |
| 732 | |
| 733 | /** |
| 734 | * s3c_fb_probe_win() - register an hardware window |
| 735 | * @sfb: The base resources for the hardware |
| 736 | * @res: Pointer to where to place the resultant window. |
| 737 | * |
| 738 | * Allocate and do the basic initialisation for one of the hardware's graphics |
| 739 | * windows. |
| 740 | */ |
| 741 | static int __devinit s3c_fb_probe_win(struct s3c_fb *sfb, unsigned int win_no, |
| 742 | struct s3c_fb_win **res) |
| 743 | { |
| 744 | struct fb_var_screeninfo *var; |
| 745 | struct fb_videomode *initmode; |
| 746 | struct s3c_fb_pd_win *windata; |
| 747 | struct s3c_fb_win *win; |
| 748 | struct fb_info *fbinfo; |
| 749 | int palette_size; |
| 750 | int ret; |
| 751 | |
| 752 | dev_dbg(sfb->dev, "probing window %d\n", win_no); |
| 753 | |
| 754 | palette_size = s3c_fb_win_pal_size(win_no); |
| 755 | |
| 756 | fbinfo = framebuffer_alloc(sizeof(struct s3c_fb_win) + |
| 757 | palette_size * sizeof(u32), sfb->dev); |
| 758 | if (!fbinfo) { |
| 759 | dev_err(sfb->dev, "failed to allocate framebuffer\n"); |
| 760 | return -ENOENT; |
| 761 | } |
| 762 | |
| 763 | windata = sfb->pdata->win[win_no]; |
| 764 | initmode = &windata->win_mode; |
| 765 | |
| 766 | WARN_ON(windata->max_bpp == 0); |
| 767 | WARN_ON(windata->win_mode.xres == 0); |
| 768 | WARN_ON(windata->win_mode.yres == 0); |
| 769 | |
| 770 | win = fbinfo->par; |
| 771 | var = &fbinfo->var; |
| 772 | win->fbinfo = fbinfo; |
| 773 | win->parent = sfb; |
| 774 | win->windata = windata; |
| 775 | win->index = win_no; |
| 776 | win->palette_buffer = (u32 *)(win + 1); |
| 777 | |
| 778 | ret = s3c_fb_alloc_memory(sfb, win); |
| 779 | if (ret) { |
| 780 | dev_err(sfb->dev, "failed to allocate display memory\n"); |
Krzysztof Helt | ddc518d | 2009-06-16 15:34:33 -0700 | [diff] [blame] | 781 | return ret; |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 782 | } |
| 783 | |
| 784 | /* setup the r/b/g positions for the window's palette */ |
| 785 | s3c_fb_init_palette(win_no, &win->palette); |
| 786 | |
| 787 | /* setup the initial video mode from the window */ |
| 788 | fb_videomode_to_var(&fbinfo->var, initmode); |
| 789 | |
| 790 | fbinfo->fix.type = FB_TYPE_PACKED_PIXELS; |
| 791 | fbinfo->fix.accel = FB_ACCEL_NONE; |
| 792 | fbinfo->var.activate = FB_ACTIVATE_NOW; |
| 793 | fbinfo->var.vmode = FB_VMODE_NONINTERLACED; |
| 794 | fbinfo->var.bits_per_pixel = windata->default_bpp; |
| 795 | fbinfo->fbops = &s3c_fb_ops; |
| 796 | fbinfo->flags = FBINFO_FLAG_DEFAULT; |
| 797 | fbinfo->pseudo_palette = &win->pseudo_palette; |
| 798 | |
| 799 | /* prepare to actually start the framebuffer */ |
| 800 | |
| 801 | ret = s3c_fb_check_var(&fbinfo->var, fbinfo); |
| 802 | if (ret < 0) { |
| 803 | dev_err(sfb->dev, "check_var failed on initial video params\n"); |
Krzysztof Helt | ddc518d | 2009-06-16 15:34:33 -0700 | [diff] [blame] | 804 | return ret; |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 805 | } |
| 806 | |
| 807 | /* create initial colour map */ |
| 808 | |
| 809 | ret = fb_alloc_cmap(&fbinfo->cmap, s3c_fb_win_pal_size(win_no), 1); |
| 810 | if (ret == 0) |
| 811 | fb_set_cmap(&fbinfo->cmap, fbinfo); |
| 812 | else |
| 813 | dev_err(sfb->dev, "failed to allocate fb cmap\n"); |
| 814 | |
| 815 | s3c_fb_set_par(fbinfo); |
| 816 | |
| 817 | dev_dbg(sfb->dev, "about to register framebuffer\n"); |
| 818 | |
| 819 | /* run the check_var and set_par on our configuration. */ |
| 820 | |
| 821 | ret = register_framebuffer(fbinfo); |
| 822 | if (ret < 0) { |
| 823 | dev_err(sfb->dev, "failed to register framebuffer\n"); |
Krzysztof Helt | ddc518d | 2009-06-16 15:34:33 -0700 | [diff] [blame] | 824 | return ret; |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 825 | } |
| 826 | |
| 827 | *res = win; |
| 828 | dev_info(sfb->dev, "window %d: fb %s\n", win_no, fbinfo->fix.id); |
| 829 | |
| 830 | return 0; |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 831 | } |
| 832 | |
| 833 | /** |
| 834 | * s3c_fb_clear_win() - clear hardware window registers. |
| 835 | * @sfb: The base resources for the hardware. |
| 836 | * @win: The window to process. |
| 837 | * |
| 838 | * Reset the specific window registers to a known state. |
| 839 | */ |
| 840 | static void s3c_fb_clear_win(struct s3c_fb *sfb, int win) |
| 841 | { |
| 842 | void __iomem *regs = sfb->regs; |
| 843 | |
| 844 | writel(0, regs + WINCON(win)); |
| 845 | writel(0xffffff, regs + WxKEYCONy(win, 0)); |
| 846 | writel(0xffffff, regs + WxKEYCONy(win, 1)); |
| 847 | |
| 848 | writel(0, regs + VIDOSD_A(win)); |
| 849 | writel(0, regs + VIDOSD_B(win)); |
| 850 | writel(0, regs + VIDOSD_C(win)); |
| 851 | } |
| 852 | |
| 853 | static int __devinit s3c_fb_probe(struct platform_device *pdev) |
| 854 | { |
| 855 | struct device *dev = &pdev->dev; |
| 856 | struct s3c_fb_platdata *pd; |
| 857 | struct s3c_fb *sfb; |
| 858 | struct resource *res; |
| 859 | int win; |
| 860 | int ret = 0; |
| 861 | |
| 862 | pd = pdev->dev.platform_data; |
| 863 | if (!pd) { |
| 864 | dev_err(dev, "no platform data specified\n"); |
| 865 | return -EINVAL; |
| 866 | } |
| 867 | |
| 868 | sfb = kzalloc(sizeof(struct s3c_fb), GFP_KERNEL); |
| 869 | if (!sfb) { |
| 870 | dev_err(dev, "no memory for framebuffers\n"); |
| 871 | return -ENOMEM; |
| 872 | } |
| 873 | |
| 874 | sfb->dev = dev; |
| 875 | sfb->pdata = pd; |
| 876 | |
| 877 | sfb->bus_clk = clk_get(dev, "lcd"); |
| 878 | if (IS_ERR(sfb->bus_clk)) { |
| 879 | dev_err(dev, "failed to get bus clock\n"); |
| 880 | goto err_sfb; |
| 881 | } |
| 882 | |
| 883 | clk_enable(sfb->bus_clk); |
| 884 | |
| 885 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 886 | if (!res) { |
| 887 | dev_err(dev, "failed to find registers\n"); |
| 888 | ret = -ENOENT; |
| 889 | goto err_clk; |
| 890 | } |
| 891 | |
| 892 | sfb->regs_res = request_mem_region(res->start, resource_size(res), |
| 893 | dev_name(dev)); |
| 894 | if (!sfb->regs_res) { |
| 895 | dev_err(dev, "failed to claim register region\n"); |
| 896 | ret = -ENOENT; |
| 897 | goto err_clk; |
| 898 | } |
| 899 | |
| 900 | sfb->regs = ioremap(res->start, resource_size(res)); |
| 901 | if (!sfb->regs) { |
| 902 | dev_err(dev, "failed to map registers\n"); |
| 903 | ret = -ENXIO; |
| 904 | goto err_req_region; |
| 905 | } |
| 906 | |
| 907 | dev_dbg(dev, "got resources (regs %p), probing windows\n", sfb->regs); |
| 908 | |
| 909 | /* setup gpio and output polarity controls */ |
| 910 | |
| 911 | pd->setup_gpio(); |
| 912 | |
| 913 | writel(pd->vidcon1, sfb->regs + VIDCON1); |
| 914 | |
| 915 | /* zero all windows before we do anything */ |
| 916 | |
| 917 | for (win = 0; win < S3C_FB_MAX_WIN; win++) |
| 918 | s3c_fb_clear_win(sfb, win); |
| 919 | |
| 920 | /* we have the register setup, start allocating framebuffers */ |
| 921 | |
| 922 | for (win = 0; win < S3C_FB_MAX_WIN; win++) { |
| 923 | if (!pd->win[win]) |
| 924 | continue; |
| 925 | |
| 926 | ret = s3c_fb_probe_win(sfb, win, &sfb->windows[win]); |
| 927 | if (ret < 0) { |
| 928 | dev_err(dev, "failed to create window %d\n", win); |
| 929 | for (; win >= 0; win--) |
| 930 | s3c_fb_release_win(sfb, sfb->windows[win]); |
| 931 | goto err_ioremap; |
| 932 | } |
| 933 | } |
| 934 | |
| 935 | platform_set_drvdata(pdev, sfb); |
| 936 | |
| 937 | return 0; |
| 938 | |
| 939 | err_ioremap: |
| 940 | iounmap(sfb->regs); |
| 941 | |
| 942 | err_req_region: |
| 943 | release_resource(sfb->regs_res); |
| 944 | kfree(sfb->regs_res); |
| 945 | |
| 946 | err_clk: |
| 947 | clk_disable(sfb->bus_clk); |
| 948 | clk_put(sfb->bus_clk); |
| 949 | |
| 950 | err_sfb: |
| 951 | kfree(sfb); |
| 952 | return ret; |
| 953 | } |
| 954 | |
| 955 | /** |
| 956 | * s3c_fb_remove() - Cleanup on module finalisation |
| 957 | * @pdev: The platform device we are bound to. |
| 958 | * |
| 959 | * Shutdown and then release all the resources that the driver allocated |
| 960 | * on initialisation. |
| 961 | */ |
| 962 | static int __devexit s3c_fb_remove(struct platform_device *pdev) |
| 963 | { |
| 964 | struct s3c_fb *sfb = platform_get_drvdata(pdev); |
| 965 | int win; |
| 966 | |
| 967 | for (win = 0; win <= S3C_FB_MAX_WIN; win++) |
Marek Szyprowski | 17663e5 | 2009-05-28 14:34:35 -0700 | [diff] [blame] | 968 | if (sfb->windows[win]) |
| 969 | s3c_fb_release_win(sfb, sfb->windows[win]); |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 970 | |
| 971 | iounmap(sfb->regs); |
| 972 | |
| 973 | clk_disable(sfb->bus_clk); |
| 974 | clk_put(sfb->bus_clk); |
| 975 | |
| 976 | release_resource(sfb->regs_res); |
| 977 | kfree(sfb->regs_res); |
| 978 | |
| 979 | kfree(sfb); |
| 980 | |
| 981 | return 0; |
| 982 | } |
| 983 | |
| 984 | #ifdef CONFIG_PM |
| 985 | static int s3c_fb_suspend(struct platform_device *pdev, pm_message_t state) |
| 986 | { |
| 987 | struct s3c_fb *sfb = platform_get_drvdata(pdev); |
| 988 | struct s3c_fb_win *win; |
| 989 | int win_no; |
| 990 | |
| 991 | for (win_no = S3C_FB_MAX_WIN; win_no >= 0; win_no--) { |
| 992 | win = sfb->windows[win_no]; |
| 993 | if (!win) |
| 994 | continue; |
| 995 | |
| 996 | /* use the blank function to push into power-down */ |
| 997 | s3c_fb_blank(FB_BLANK_POWERDOWN, win->fbinfo); |
| 998 | } |
| 999 | |
| 1000 | clk_disable(sfb->bus_clk); |
| 1001 | return 0; |
| 1002 | } |
| 1003 | |
| 1004 | static int s3c_fb_resume(struct platform_device *pdev) |
| 1005 | { |
| 1006 | struct s3c_fb *sfb = platform_get_drvdata(pdev); |
Marek Szyprowski | 17663e5 | 2009-05-28 14:34:35 -0700 | [diff] [blame] | 1007 | struct s3c_fb_platdata *pd = sfb->pdata; |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 1008 | struct s3c_fb_win *win; |
| 1009 | int win_no; |
| 1010 | |
| 1011 | clk_enable(sfb->bus_clk); |
| 1012 | |
Marek Szyprowski | 17663e5 | 2009-05-28 14:34:35 -0700 | [diff] [blame] | 1013 | /* setup registers */ |
| 1014 | writel(pd->vidcon1, sfb->regs + VIDCON1); |
| 1015 | |
| 1016 | /* zero all windows before we do anything */ |
| 1017 | for (win_no = 0; win_no < S3C_FB_MAX_WIN; win_no++) |
| 1018 | s3c_fb_clear_win(sfb, win_no); |
| 1019 | |
| 1020 | /* restore framebuffers */ |
Ben Dooks | ec549a0 | 2009-03-31 15:25:39 -0700 | [diff] [blame] | 1021 | for (win_no = 0; win_no < S3C_FB_MAX_WIN; win_no++) { |
| 1022 | win = sfb->windows[win_no]; |
| 1023 | if (!win) |
| 1024 | continue; |
| 1025 | |
| 1026 | dev_dbg(&pdev->dev, "resuming window %d\n", win_no); |
| 1027 | s3c_fb_set_par(win->fbinfo); |
| 1028 | } |
| 1029 | |
| 1030 | return 0; |
| 1031 | } |
| 1032 | #else |
| 1033 | #define s3c_fb_suspend NULL |
| 1034 | #define s3c_fb_resume NULL |
| 1035 | #endif |
| 1036 | |
| 1037 | static struct platform_driver s3c_fb_driver = { |
| 1038 | .probe = s3c_fb_probe, |
| 1039 | .remove = s3c_fb_remove, |
| 1040 | .suspend = s3c_fb_suspend, |
| 1041 | .resume = s3c_fb_resume, |
| 1042 | .driver = { |
| 1043 | .name = "s3c-fb", |
| 1044 | .owner = THIS_MODULE, |
| 1045 | }, |
| 1046 | }; |
| 1047 | |
| 1048 | static int __init s3c_fb_init(void) |
| 1049 | { |
| 1050 | return platform_driver_register(&s3c_fb_driver); |
| 1051 | } |
| 1052 | |
| 1053 | static void __exit s3c_fb_cleanup(void) |
| 1054 | { |
| 1055 | platform_driver_unregister(&s3c_fb_driver); |
| 1056 | } |
| 1057 | |
| 1058 | module_init(s3c_fb_init); |
| 1059 | module_exit(s3c_fb_cleanup); |
| 1060 | |
| 1061 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); |
| 1062 | MODULE_DESCRIPTION("Samsung S3C SoC Framebuffer driver"); |
| 1063 | MODULE_LICENSE("GPL"); |
| 1064 | MODULE_ALIAS("platform:s3c-fb"); |