Wang Qiang | 8661970 | 2010-03-10 15:21:47 -0800 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Copyright (c) 2009 Nuvoton technology corporation |
| 4 | * All rights reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * Description: |
| 12 | * Nuvoton LCD Controller Driver |
| 13 | * Author: |
| 14 | * Wang Qiang (rurality.linux@gmail.com) 2009/12/11 |
| 15 | */ |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/kernel.h> |
Jamie Iles | ec03031 | 2011-01-11 12:43:43 +0000 | [diff] [blame] | 18 | #include <linux/err.h> |
Wang Qiang | 8661970 | 2010-03-10 15:21:47 -0800 | [diff] [blame] | 19 | #include <linux/errno.h> |
| 20 | #include <linux/string.h> |
| 21 | #include <linux/mm.h> |
| 22 | #include <linux/tty.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <linux/delay.h> |
| 25 | #include <linux/fb.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/dma-mapping.h> |
| 28 | #include <linux/interrupt.h> |
| 29 | #include <linux/workqueue.h> |
| 30 | #include <linux/wait.h> |
| 31 | #include <linux/platform_device.h> |
| 32 | #include <linux/clk.h> |
| 33 | #include <linux/cpufreq.h> |
| 34 | #include <linux/io.h> |
| 35 | #include <linux/pm.h> |
| 36 | #include <linux/device.h> |
| 37 | |
| 38 | #include <mach/map.h> |
| 39 | #include <mach/regs-clock.h> |
| 40 | #include <mach/regs-ldm.h> |
| 41 | #include <mach/fb.h> |
Wang Qiang | 8661970 | 2010-03-10 15:21:47 -0800 | [diff] [blame] | 42 | |
| 43 | #include "nuc900fb.h" |
| 44 | |
| 45 | |
| 46 | /* |
| 47 | * Initialize the nuc900 video (dual) buffer address |
| 48 | */ |
| 49 | static void nuc900fb_set_lcdaddr(struct fb_info *info) |
| 50 | { |
| 51 | struct nuc900fb_info *fbi = info->par; |
| 52 | void __iomem *regs = fbi->io; |
| 53 | unsigned long vbaddr1, vbaddr2; |
| 54 | |
| 55 | vbaddr1 = info->fix.smem_start; |
| 56 | vbaddr2 = info->fix.smem_start; |
| 57 | vbaddr2 += info->fix.line_length * info->var.yres; |
| 58 | |
| 59 | /* set frambuffer start phy addr*/ |
| 60 | writel(vbaddr1, regs + REG_LCM_VA_BADDR0); |
| 61 | writel(vbaddr2, regs + REG_LCM_VA_BADDR1); |
| 62 | |
| 63 | writel(fbi->regs.lcd_va_fbctrl, regs + REG_LCM_VA_FBCTRL); |
| 64 | writel(fbi->regs.lcd_va_scale, regs + REG_LCM_VA_SCALE); |
| 65 | } |
| 66 | |
| 67 | /* |
| 68 | * calculate divider for lcd div |
| 69 | */ |
| 70 | static unsigned int nuc900fb_calc_pixclk(struct nuc900fb_info *fbi, |
| 71 | unsigned long pixclk) |
| 72 | { |
| 73 | unsigned long clk = fbi->clk_rate; |
| 74 | unsigned long long div; |
| 75 | |
| 76 | /* pixclk is in picseconds. our clock is in Hz*/ |
| 77 | /* div = (clk * pixclk)/10^12 */ |
| 78 | div = (unsigned long long)clk * pixclk; |
| 79 | div >>= 12; |
| 80 | do_div(div, 625 * 625UL * 625); |
| 81 | |
| 82 | dev_dbg(fbi->dev, "pixclk %ld, divisor is %lld\n", pixclk, div); |
| 83 | |
| 84 | return div; |
| 85 | } |
| 86 | |
| 87 | /* |
| 88 | * Check the video params of 'var'. |
| 89 | */ |
| 90 | static int nuc900fb_check_var(struct fb_var_screeninfo *var, |
| 91 | struct fb_info *info) |
| 92 | { |
| 93 | struct nuc900fb_info *fbi = info->par; |
| 94 | struct nuc900fb_mach_info *mach_info = fbi->dev->platform_data; |
| 95 | struct nuc900fb_display *display = NULL; |
| 96 | struct nuc900fb_display *default_display = mach_info->displays + |
| 97 | mach_info->default_display; |
| 98 | int i; |
| 99 | |
| 100 | dev_dbg(fbi->dev, "check_var(var=%p, info=%p)\n", var, info); |
| 101 | |
| 102 | /* validate x/y resolution */ |
| 103 | /* choose default mode if possible */ |
| 104 | if (var->xres == default_display->xres && |
| 105 | var->yres == default_display->yres && |
| 106 | var->bits_per_pixel == default_display->bpp) |
| 107 | display = default_display; |
| 108 | else |
| 109 | for (i = 0; i < mach_info->num_displays; i++) |
| 110 | if (var->xres == mach_info->displays[i].xres && |
| 111 | var->yres == mach_info->displays[i].yres && |
| 112 | var->bits_per_pixel == mach_info->displays[i].bpp) { |
| 113 | display = mach_info->displays + i; |
| 114 | break; |
| 115 | } |
| 116 | |
| 117 | if (display == NULL) { |
| 118 | printk(KERN_ERR "wrong resolution or depth %dx%d at %d bit per pixel\n", |
| 119 | var->xres, var->yres, var->bits_per_pixel); |
| 120 | return -EINVAL; |
| 121 | } |
| 122 | |
| 123 | /* it should be the same size as the display */ |
| 124 | var->xres_virtual = display->xres; |
| 125 | var->yres_virtual = display->yres; |
| 126 | var->height = display->height; |
| 127 | var->width = display->width; |
| 128 | |
| 129 | /* copy lcd settings */ |
| 130 | var->pixclock = display->pixclock; |
| 131 | var->left_margin = display->left_margin; |
| 132 | var->right_margin = display->right_margin; |
| 133 | var->upper_margin = display->upper_margin; |
| 134 | var->lower_margin = display->lower_margin; |
| 135 | var->vsync_len = display->vsync_len; |
| 136 | var->hsync_len = display->hsync_len; |
| 137 | |
| 138 | var->transp.offset = 0; |
| 139 | var->transp.length = 0; |
| 140 | |
| 141 | fbi->regs.lcd_dccs = display->dccs; |
| 142 | fbi->regs.lcd_device_ctrl = display->devctl; |
| 143 | fbi->regs.lcd_va_fbctrl = display->fbctrl; |
| 144 | fbi->regs.lcd_va_scale = display->scale; |
| 145 | |
| 146 | /* set R/G/B possions */ |
| 147 | switch (var->bits_per_pixel) { |
| 148 | case 1: |
| 149 | case 2: |
| 150 | case 4: |
| 151 | case 8: |
| 152 | default: |
| 153 | var->red.offset = 0; |
| 154 | var->red.length = var->bits_per_pixel; |
| 155 | var->green = var->red; |
| 156 | var->blue = var->red; |
| 157 | break; |
| 158 | case 12: |
| 159 | var->red.length = 4; |
| 160 | var->green.length = 4; |
| 161 | var->blue.length = 4; |
| 162 | var->red.offset = 8; |
| 163 | var->green.offset = 4; |
| 164 | var->blue.offset = 0; |
| 165 | break; |
| 166 | case 16: |
| 167 | var->red.length = 5; |
| 168 | var->green.length = 6; |
| 169 | var->blue.length = 5; |
| 170 | var->red.offset = 11; |
| 171 | var->green.offset = 5; |
| 172 | var->blue.offset = 0; |
| 173 | break; |
| 174 | case 18: |
| 175 | var->red.length = 6; |
| 176 | var->green.length = 6; |
| 177 | var->blue.length = 6; |
| 178 | var->red.offset = 12; |
| 179 | var->green.offset = 6; |
| 180 | var->blue.offset = 0; |
| 181 | break; |
| 182 | case 32: |
| 183 | var->red.length = 8; |
| 184 | var->green.length = 8; |
| 185 | var->blue.length = 8; |
| 186 | var->red.offset = 16; |
| 187 | var->green.offset = 8; |
| 188 | var->blue.offset = 0; |
| 189 | break; |
| 190 | } |
| 191 | |
| 192 | return 0; |
| 193 | } |
| 194 | |
| 195 | /* |
| 196 | * Calculate lcd register values from var setting & save into hw |
| 197 | */ |
| 198 | static void nuc900fb_calculate_lcd_regs(const struct fb_info *info, |
| 199 | struct nuc900fb_hw *regs) |
| 200 | { |
| 201 | const struct fb_var_screeninfo *var = &info->var; |
| 202 | int vtt = var->height + var->upper_margin + var->lower_margin; |
| 203 | int htt = var->width + var->left_margin + var->right_margin; |
| 204 | int hsync = var->width + var->right_margin; |
| 205 | int vsync = var->height + var->lower_margin; |
| 206 | |
| 207 | regs->lcd_crtc_size = LCM_CRTC_SIZE_VTTVAL(vtt) | |
| 208 | LCM_CRTC_SIZE_HTTVAL(htt); |
| 209 | regs->lcd_crtc_dend = LCM_CRTC_DEND_VDENDVAL(var->height) | |
| 210 | LCM_CRTC_DEND_HDENDVAL(var->width); |
| 211 | regs->lcd_crtc_hr = LCM_CRTC_HR_EVAL(var->width + 5) | |
| 212 | LCM_CRTC_HR_SVAL(var->width + 1); |
| 213 | regs->lcd_crtc_hsync = LCM_CRTC_HSYNC_EVAL(hsync + var->hsync_len) | |
| 214 | LCM_CRTC_HSYNC_SVAL(hsync); |
| 215 | regs->lcd_crtc_vr = LCM_CRTC_VR_EVAL(vsync + var->vsync_len) | |
| 216 | LCM_CRTC_VR_SVAL(vsync); |
| 217 | |
| 218 | } |
| 219 | |
| 220 | /* |
| 221 | * Activate (set) the controller from the given framebuffer |
| 222 | * information |
| 223 | */ |
| 224 | static void nuc900fb_activate_var(struct fb_info *info) |
| 225 | { |
| 226 | struct nuc900fb_info *fbi = info->par; |
| 227 | void __iomem *regs = fbi->io; |
| 228 | struct fb_var_screeninfo *var = &info->var; |
| 229 | int clkdiv; |
| 230 | |
| 231 | clkdiv = nuc900fb_calc_pixclk(fbi, var->pixclock) - 1; |
| 232 | if (clkdiv < 0) |
| 233 | clkdiv = 0; |
| 234 | |
| 235 | nuc900fb_calculate_lcd_regs(info, &fbi->regs); |
| 236 | |
| 237 | /* set the new lcd registers*/ |
| 238 | |
| 239 | dev_dbg(fbi->dev, "new lcd register set:\n"); |
| 240 | dev_dbg(fbi->dev, "dccs = 0x%08x\n", fbi->regs.lcd_dccs); |
| 241 | dev_dbg(fbi->dev, "dev_ctl = 0x%08x\n", fbi->regs.lcd_device_ctrl); |
| 242 | dev_dbg(fbi->dev, "crtc_size = 0x%08x\n", fbi->regs.lcd_crtc_size); |
| 243 | dev_dbg(fbi->dev, "crtc_dend = 0x%08x\n", fbi->regs.lcd_crtc_dend); |
| 244 | dev_dbg(fbi->dev, "crtc_hr = 0x%08x\n", fbi->regs.lcd_crtc_hr); |
| 245 | dev_dbg(fbi->dev, "crtc_hsync = 0x%08x\n", fbi->regs.lcd_crtc_hsync); |
| 246 | dev_dbg(fbi->dev, "crtc_vr = 0x%08x\n", fbi->regs.lcd_crtc_vr); |
| 247 | |
| 248 | writel(fbi->regs.lcd_device_ctrl, regs + REG_LCM_DEV_CTRL); |
| 249 | writel(fbi->regs.lcd_crtc_size, regs + REG_LCM_CRTC_SIZE); |
| 250 | writel(fbi->regs.lcd_crtc_dend, regs + REG_LCM_CRTC_DEND); |
| 251 | writel(fbi->regs.lcd_crtc_hr, regs + REG_LCM_CRTC_HR); |
| 252 | writel(fbi->regs.lcd_crtc_hsync, regs + REG_LCM_CRTC_HSYNC); |
| 253 | writel(fbi->regs.lcd_crtc_vr, regs + REG_LCM_CRTC_VR); |
| 254 | |
| 255 | /* set lcd address pointers */ |
| 256 | nuc900fb_set_lcdaddr(info); |
| 257 | |
| 258 | writel(fbi->regs.lcd_dccs, regs + REG_LCM_DCCS); |
| 259 | } |
| 260 | |
| 261 | /* |
| 262 | * Alters the hardware state. |
| 263 | * |
| 264 | */ |
| 265 | static int nuc900fb_set_par(struct fb_info *info) |
| 266 | { |
| 267 | struct fb_var_screeninfo *var = &info->var; |
| 268 | |
| 269 | switch (var->bits_per_pixel) { |
| 270 | case 32: |
| 271 | case 24: |
| 272 | case 18: |
| 273 | case 16: |
| 274 | case 12: |
| 275 | info->fix.visual = FB_VISUAL_TRUECOLOR; |
| 276 | break; |
| 277 | case 1: |
| 278 | info->fix.visual = FB_VISUAL_MONO01; |
| 279 | break; |
| 280 | default: |
| 281 | info->fix.visual = FB_VISUAL_PSEUDOCOLOR; |
| 282 | break; |
| 283 | } |
| 284 | |
| 285 | info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8; |
| 286 | |
| 287 | /* activate this new configuration */ |
| 288 | nuc900fb_activate_var(info); |
| 289 | return 0; |
| 290 | } |
| 291 | |
| 292 | static inline unsigned int chan_to_field(unsigned int chan, |
| 293 | struct fb_bitfield *bf) |
| 294 | { |
| 295 | chan &= 0xffff; |
| 296 | chan >>= 16 - bf->length; |
| 297 | return chan << bf->offset; |
| 298 | } |
| 299 | |
| 300 | static int nuc900fb_setcolreg(unsigned regno, |
| 301 | unsigned red, unsigned green, unsigned blue, |
| 302 | unsigned transp, struct fb_info *info) |
| 303 | { |
| 304 | unsigned int val; |
| 305 | |
| 306 | switch (info->fix.visual) { |
| 307 | case FB_VISUAL_TRUECOLOR: |
| 308 | /* true-colour, use pseuo-palette */ |
| 309 | if (regno < 16) { |
| 310 | u32 *pal = info->pseudo_palette; |
| 311 | |
| 312 | val = chan_to_field(red, &info->var.red); |
| 313 | val |= chan_to_field(green, &info->var.green); |
| 314 | val |= chan_to_field(blue, &info->var.blue); |
| 315 | pal[regno] = val; |
| 316 | } |
| 317 | break; |
| 318 | |
| 319 | default: |
| 320 | return 1; /* unknown type */ |
| 321 | } |
| 322 | return 0; |
| 323 | } |
| 324 | |
| 325 | /** |
| 326 | * nuc900fb_blank |
| 327 | * |
| 328 | */ |
| 329 | static int nuc900fb_blank(int blank_mode, struct fb_info *info) |
| 330 | { |
| 331 | |
| 332 | return 0; |
| 333 | } |
| 334 | |
| 335 | static struct fb_ops nuc900fb_ops = { |
| 336 | .owner = THIS_MODULE, |
| 337 | .fb_check_var = nuc900fb_check_var, |
| 338 | .fb_set_par = nuc900fb_set_par, |
| 339 | .fb_blank = nuc900fb_blank, |
| 340 | .fb_setcolreg = nuc900fb_setcolreg, |
| 341 | .fb_fillrect = cfb_fillrect, |
| 342 | .fb_copyarea = cfb_copyarea, |
| 343 | .fb_imageblit = cfb_imageblit, |
| 344 | }; |
| 345 | |
| 346 | |
| 347 | static inline void modify_gpio(void __iomem *reg, |
| 348 | unsigned long set, unsigned long mask) |
| 349 | { |
| 350 | unsigned long tmp; |
| 351 | tmp = readl(reg) & ~mask; |
| 352 | writel(tmp | set, reg); |
| 353 | } |
| 354 | |
| 355 | /* |
| 356 | * Initialise LCD-related registers |
| 357 | */ |
| 358 | static int nuc900fb_init_registers(struct fb_info *info) |
| 359 | { |
| 360 | struct nuc900fb_info *fbi = info->par; |
| 361 | struct nuc900fb_mach_info *mach_info = fbi->dev->platform_data; |
| 362 | void __iomem *regs = fbi->io; |
| 363 | |
| 364 | /*reset the display engine*/ |
| 365 | writel(0, regs + REG_LCM_DCCS); |
| 366 | writel(readl(regs + REG_LCM_DCCS) | LCM_DCCS_ENG_RST, |
| 367 | regs + REG_LCM_DCCS); |
| 368 | ndelay(100); |
| 369 | writel(readl(regs + REG_LCM_DCCS) & (~LCM_DCCS_ENG_RST), |
| 370 | regs + REG_LCM_DCCS); |
| 371 | ndelay(100); |
| 372 | |
| 373 | writel(0, regs + REG_LCM_DEV_CTRL); |
| 374 | |
| 375 | /* config gpio output */ |
| 376 | modify_gpio(W90X900_VA_GPIO + 0x54, mach_info->gpio_dir, |
| 377 | mach_info->gpio_dir_mask); |
| 378 | modify_gpio(W90X900_VA_GPIO + 0x58, mach_info->gpio_data, |
| 379 | mach_info->gpio_data_mask); |
| 380 | |
| 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | |
| 385 | /* |
| 386 | * Alloc the SDRAM region of NUC900 for the frame buffer. |
| 387 | * The buffer should be a non-cached, non-buffered, memory region |
| 388 | * to allow palette and pixel writes without flushing the cache. |
| 389 | */ |
| 390 | static int __init nuc900fb_map_video_memory(struct fb_info *info) |
| 391 | { |
| 392 | struct nuc900fb_info *fbi = info->par; |
| 393 | dma_addr_t map_dma; |
| 394 | unsigned long map_size = PAGE_ALIGN(info->fix.smem_len); |
| 395 | |
| 396 | dev_dbg(fbi->dev, "nuc900fb_map_video_memory(fbi=%p) map_size %lu\n", |
| 397 | fbi, map_size); |
| 398 | |
| 399 | info->screen_base = dma_alloc_writecombine(fbi->dev, map_size, |
| 400 | &map_dma, GFP_KERNEL); |
| 401 | |
| 402 | if (!info->screen_base) |
| 403 | return -ENOMEM; |
| 404 | |
| 405 | memset(info->screen_base, 0x00, map_size); |
| 406 | info->fix.smem_start = map_dma; |
| 407 | |
| 408 | return 0; |
| 409 | } |
| 410 | |
| 411 | static inline void nuc900fb_unmap_video_memory(struct fb_info *info) |
| 412 | { |
| 413 | struct nuc900fb_info *fbi = info->par; |
| 414 | dma_free_writecombine(fbi->dev, PAGE_ALIGN(info->fix.smem_len), |
| 415 | info->screen_base, info->fix.smem_start); |
| 416 | } |
| 417 | |
| 418 | static irqreturn_t nuc900fb_irqhandler(int irq, void *dev_id) |
| 419 | { |
| 420 | struct nuc900fb_info *fbi = dev_id; |
| 421 | void __iomem *regs = fbi->io; |
| 422 | void __iomem *irq_base = fbi->irq_base; |
| 423 | unsigned long lcdirq = readl(regs + REG_LCM_INT_CS); |
| 424 | |
| 425 | if (lcdirq & LCM_INT_CS_DISP_F_STATUS) { |
| 426 | writel(readl(irq_base) | 1<<30, irq_base); |
| 427 | |
| 428 | /* wait VA_EN low */ |
| 429 | if ((readl(regs + REG_LCM_DCCS) & |
| 430 | LCM_DCCS_SINGLE) == LCM_DCCS_SINGLE) |
| 431 | while ((readl(regs + REG_LCM_DCCS) & |
| 432 | LCM_DCCS_VA_EN) == LCM_DCCS_VA_EN) |
| 433 | ; |
| 434 | /* display_out-enable */ |
| 435 | writel(readl(regs + REG_LCM_DCCS) | LCM_DCCS_DISP_OUT_EN, |
| 436 | regs + REG_LCM_DCCS); |
| 437 | /* va-enable*/ |
| 438 | writel(readl(regs + REG_LCM_DCCS) | LCM_DCCS_VA_EN, |
| 439 | regs + REG_LCM_DCCS); |
| 440 | } else if (lcdirq & LCM_INT_CS_UNDERRUN_INT) { |
| 441 | writel(readl(irq_base) | LCM_INT_CS_UNDERRUN_INT, irq_base); |
| 442 | } else if (lcdirq & LCM_INT_CS_BUS_ERROR_INT) { |
| 443 | writel(readl(irq_base) | LCM_INT_CS_BUS_ERROR_INT, irq_base); |
| 444 | } |
| 445 | |
| 446 | return IRQ_HANDLED; |
| 447 | } |
| 448 | |
| 449 | #ifdef CONFIG_CPU_FREQ |
| 450 | |
| 451 | static int nuc900fb_cpufreq_transition(struct notifier_block *nb, |
| 452 | unsigned long val, void *data) |
| 453 | { |
| 454 | struct nuc900fb_info *info; |
| 455 | struct fb_info *fbinfo; |
| 456 | long delta_f; |
| 457 | info = container_of(nb, struct nuc900fb_info, freq_transition); |
| 458 | fbinfo = platform_get_drvdata(to_platform_device(info->dev)); |
| 459 | |
| 460 | delta_f = info->clk_rate - clk_get_rate(info->clk); |
| 461 | |
| 462 | if ((val == CPUFREQ_POSTCHANGE && delta_f > 0) || |
| 463 | (val == CPUFREQ_PRECHANGE && delta_f < 0)) { |
| 464 | info->clk_rate = clk_get_rate(info->clk); |
| 465 | nuc900fb_activate_var(fbinfo); |
| 466 | } |
| 467 | |
| 468 | return 0; |
| 469 | } |
| 470 | |
| 471 | static inline int nuc900fb_cpufreq_register(struct nuc900fb_info *fbi) |
| 472 | { |
| 473 | fbi->freq_transition.notifier_call = nuc900fb_cpufreq_transition; |
| 474 | return cpufreq_register_notifier(&fbi->freq_transition, |
| 475 | CPUFREQ_TRANSITION_NOTIFIER); |
| 476 | } |
| 477 | |
| 478 | static inline void nuc900fb_cpufreq_deregister(struct nuc900fb_info *fbi) |
| 479 | { |
| 480 | cpufreq_unregister_notifier(&fbi->freq_transition, |
| 481 | CPUFREQ_TRANSITION_NOTIFIER); |
| 482 | } |
| 483 | #else |
| 484 | static inline int nuc900fb_cpufreq_transition(struct notifier_block *nb, |
| 485 | unsigned long val, void *data) |
| 486 | { |
| 487 | return 0; |
| 488 | } |
| 489 | |
| 490 | static inline int nuc900fb_cpufreq_register(struct nuc900fb_info *fbi) |
| 491 | { |
| 492 | return 0; |
| 493 | } |
| 494 | |
| 495 | static inline void nuc900fb_cpufreq_deregister(struct nuc900fb_info *info) |
| 496 | { |
| 497 | } |
| 498 | #endif |
| 499 | |
| 500 | static char driver_name[] = "nuc900fb"; |
| 501 | |
| 502 | static int __devinit nuc900fb_probe(struct platform_device *pdev) |
| 503 | { |
| 504 | struct nuc900fb_info *fbi; |
| 505 | struct nuc900fb_display *display; |
| 506 | struct fb_info *fbinfo; |
| 507 | struct nuc900fb_mach_info *mach_info; |
| 508 | struct resource *res; |
| 509 | int ret; |
| 510 | int irq; |
| 511 | int i; |
| 512 | int size; |
| 513 | |
| 514 | dev_dbg(&pdev->dev, "devinit\n"); |
| 515 | mach_info = pdev->dev.platform_data; |
| 516 | if (mach_info == NULL) { |
| 517 | dev_err(&pdev->dev, |
| 518 | "no platform data for lcd, cannot attach\n"); |
| 519 | return -EINVAL; |
| 520 | } |
| 521 | |
| 522 | if (mach_info->default_display > mach_info->num_displays) { |
| 523 | dev_err(&pdev->dev, |
| 524 | "default display No. is %d but only %d displays \n", |
| 525 | mach_info->default_display, mach_info->num_displays); |
| 526 | return -EINVAL; |
| 527 | } |
| 528 | |
| 529 | |
| 530 | display = mach_info->displays + mach_info->default_display; |
| 531 | |
| 532 | irq = platform_get_irq(pdev, 0); |
| 533 | if (irq < 0) { |
| 534 | dev_err(&pdev->dev, "no irq for device\n"); |
| 535 | return -ENOENT; |
| 536 | } |
| 537 | |
| 538 | fbinfo = framebuffer_alloc(sizeof(struct nuc900fb_info), &pdev->dev); |
| 539 | if (!fbinfo) |
| 540 | return -ENOMEM; |
| 541 | |
| 542 | platform_set_drvdata(pdev, fbinfo); |
| 543 | |
| 544 | fbi = fbinfo->par; |
| 545 | fbi->dev = &pdev->dev; |
| 546 | |
| 547 | #ifdef CONFIG_CPU_NUC950 |
| 548 | fbi->drv_type = LCDDRV_NUC950; |
| 549 | #endif |
| 550 | |
| 551 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 552 | |
Joe Perches | 28f65c11 | 2011-06-09 09:13:32 -0700 | [diff] [blame] | 553 | size = resource_size(res); |
Wang Qiang | 8661970 | 2010-03-10 15:21:47 -0800 | [diff] [blame] | 554 | fbi->mem = request_mem_region(res->start, size, pdev->name); |
| 555 | if (fbi->mem == NULL) { |
| 556 | dev_err(&pdev->dev, "failed to alloc memory region\n"); |
| 557 | ret = -ENOENT; |
| 558 | goto free_fb; |
| 559 | } |
| 560 | |
| 561 | fbi->io = ioremap(res->start, size); |
| 562 | if (fbi->io == NULL) { |
| 563 | dev_err(&pdev->dev, "ioremap() of lcd registers failed\n"); |
| 564 | ret = -ENXIO; |
| 565 | goto release_mem_region; |
| 566 | } |
| 567 | |
| 568 | fbi->irq_base = fbi->io + REG_LCM_INT_CS; |
| 569 | |
| 570 | |
| 571 | /* Stop the LCD */ |
| 572 | writel(0, fbi->io + REG_LCM_DCCS); |
| 573 | |
| 574 | /* fill the fbinfo*/ |
| 575 | strcpy(fbinfo->fix.id, driver_name); |
| 576 | fbinfo->fix.type = FB_TYPE_PACKED_PIXELS; |
| 577 | fbinfo->fix.type_aux = 0; |
| 578 | fbinfo->fix.xpanstep = 0; |
| 579 | fbinfo->fix.ypanstep = 0; |
| 580 | fbinfo->fix.ywrapstep = 0; |
| 581 | fbinfo->fix.accel = FB_ACCEL_NONE; |
| 582 | fbinfo->var.nonstd = 0; |
| 583 | fbinfo->var.activate = FB_ACTIVATE_NOW; |
| 584 | fbinfo->var.accel_flags = 0; |
| 585 | fbinfo->var.vmode = FB_VMODE_NONINTERLACED; |
| 586 | fbinfo->fbops = &nuc900fb_ops; |
| 587 | fbinfo->flags = FBINFO_FLAG_DEFAULT; |
| 588 | fbinfo->pseudo_palette = &fbi->pseudo_pal; |
| 589 | |
Yong Zhang | f8798cc | 2011-09-22 16:59:16 +0800 | [diff] [blame] | 590 | ret = request_irq(irq, nuc900fb_irqhandler, 0, |
Wang Qiang | 8661970 | 2010-03-10 15:21:47 -0800 | [diff] [blame] | 591 | pdev->name, fbinfo); |
| 592 | if (ret) { |
| 593 | dev_err(&pdev->dev, "cannot register irq handler %d -err %d\n", |
| 594 | irq, ret); |
| 595 | ret = -EBUSY; |
| 596 | goto release_regs; |
| 597 | } |
| 598 | |
Wang Qiang | 8661970 | 2010-03-10 15:21:47 -0800 | [diff] [blame] | 599 | fbi->clk = clk_get(&pdev->dev, NULL); |
Jamie Iles | ec03031 | 2011-01-11 12:43:43 +0000 | [diff] [blame] | 600 | if (IS_ERR(fbi->clk)) { |
Wang Qiang | 8661970 | 2010-03-10 15:21:47 -0800 | [diff] [blame] | 601 | printk(KERN_ERR "nuc900-lcd:failed to get lcd clock source\n"); |
Jamie Iles | ec03031 | 2011-01-11 12:43:43 +0000 | [diff] [blame] | 602 | ret = PTR_ERR(fbi->clk); |
Wang Qiang | 8661970 | 2010-03-10 15:21:47 -0800 | [diff] [blame] | 603 | goto release_irq; |
| 604 | } |
| 605 | |
| 606 | clk_enable(fbi->clk); |
| 607 | dev_dbg(&pdev->dev, "got and enabled clock\n"); |
| 608 | |
| 609 | fbi->clk_rate = clk_get_rate(fbi->clk); |
| 610 | |
| 611 | /* calutate the video buffer size */ |
| 612 | for (i = 0; i < mach_info->num_displays; i++) { |
| 613 | unsigned long smem_len = mach_info->displays[i].xres; |
| 614 | smem_len *= mach_info->displays[i].yres; |
| 615 | smem_len *= mach_info->displays[i].bpp; |
| 616 | smem_len >>= 3; |
| 617 | if (fbinfo->fix.smem_len < smem_len) |
| 618 | fbinfo->fix.smem_len = smem_len; |
| 619 | } |
| 620 | |
| 621 | /* Initialize Video Memory */ |
| 622 | ret = nuc900fb_map_video_memory(fbinfo); |
| 623 | if (ret) { |
| 624 | printk(KERN_ERR "Failed to allocate video RAM: %x\n", ret); |
| 625 | goto release_clock; |
| 626 | } |
| 627 | |
| 628 | dev_dbg(&pdev->dev, "got video memory\n"); |
| 629 | |
| 630 | fbinfo->var.xres = display->xres; |
| 631 | fbinfo->var.yres = display->yres; |
| 632 | fbinfo->var.bits_per_pixel = display->bpp; |
| 633 | |
| 634 | nuc900fb_init_registers(fbinfo); |
| 635 | |
| 636 | nuc900fb_check_var(&fbinfo->var, fbinfo); |
| 637 | |
| 638 | ret = nuc900fb_cpufreq_register(fbi); |
| 639 | if (ret < 0) { |
| 640 | dev_err(&pdev->dev, "Failed to register cpufreq\n"); |
| 641 | goto free_video_memory; |
| 642 | } |
| 643 | |
| 644 | ret = register_framebuffer(fbinfo); |
| 645 | if (ret) { |
| 646 | printk(KERN_ERR "failed to register framebuffer device: %d\n", |
| 647 | ret); |
| 648 | goto free_cpufreq; |
| 649 | } |
| 650 | |
| 651 | printk(KERN_INFO "fb%d: %s frame buffer device\n", |
| 652 | fbinfo->node, fbinfo->fix.id); |
| 653 | |
| 654 | return 0; |
| 655 | |
| 656 | free_cpufreq: |
| 657 | nuc900fb_cpufreq_deregister(fbi); |
| 658 | free_video_memory: |
| 659 | nuc900fb_unmap_video_memory(fbinfo); |
| 660 | release_clock: |
| 661 | clk_disable(fbi->clk); |
| 662 | clk_put(fbi->clk); |
| 663 | release_irq: |
| 664 | free_irq(irq, fbi); |
| 665 | release_regs: |
| 666 | iounmap(fbi->io); |
| 667 | release_mem_region: |
Dan Carpenter | a42dcb8 | 2010-05-24 14:34:09 -0700 | [diff] [blame] | 668 | release_mem_region(res->start, size); |
Wang Qiang | 8661970 | 2010-03-10 15:21:47 -0800 | [diff] [blame] | 669 | free_fb: |
| 670 | framebuffer_release(fbinfo); |
| 671 | return ret; |
| 672 | } |
| 673 | |
| 674 | /* |
| 675 | * shutdown the lcd controller |
| 676 | */ |
| 677 | static void nuc900fb_stop_lcd(struct fb_info *info) |
| 678 | { |
| 679 | struct nuc900fb_info *fbi = info->par; |
| 680 | void __iomem *regs = fbi->io; |
| 681 | |
| 682 | writel((~LCM_DCCS_DISP_INT_EN) | (~LCM_DCCS_VA_EN) | (~LCM_DCCS_OSD_EN), |
| 683 | regs + REG_LCM_DCCS); |
| 684 | } |
| 685 | |
| 686 | /* |
| 687 | * Cleanup |
| 688 | */ |
| 689 | static int nuc900fb_remove(struct platform_device *pdev) |
| 690 | { |
| 691 | struct fb_info *fbinfo = platform_get_drvdata(pdev); |
| 692 | struct nuc900fb_info *fbi = fbinfo->par; |
| 693 | int irq; |
| 694 | |
| 695 | nuc900fb_stop_lcd(fbinfo); |
| 696 | msleep(1); |
| 697 | |
Axel Lin | 6c9571f | 2011-01-17 16:25:57 +0800 | [diff] [blame] | 698 | unregister_framebuffer(fbinfo); |
| 699 | nuc900fb_cpufreq_deregister(fbi); |
Wang Qiang | 8661970 | 2010-03-10 15:21:47 -0800 | [diff] [blame] | 700 | nuc900fb_unmap_video_memory(fbinfo); |
| 701 | |
| 702 | iounmap(fbi->io); |
| 703 | |
| 704 | irq = platform_get_irq(pdev, 0); |
| 705 | free_irq(irq, fbi); |
| 706 | |
| 707 | release_resource(fbi->mem); |
| 708 | kfree(fbi->mem); |
| 709 | |
| 710 | platform_set_drvdata(pdev, NULL); |
| 711 | framebuffer_release(fbinfo); |
| 712 | |
| 713 | return 0; |
| 714 | } |
| 715 | |
| 716 | #ifdef CONFIG_PM |
| 717 | |
| 718 | /* |
| 719 | * suspend and resume support for the lcd controller |
| 720 | */ |
| 721 | |
| 722 | static int nuc900fb_suspend(struct platform_device *dev, pm_message_t state) |
| 723 | { |
| 724 | struct fb_info *fbinfo = platform_get_drvdata(dev); |
| 725 | struct nuc900fb_info *info = fbinfo->par; |
| 726 | |
Axel Lin | d10df50 | 2011-01-17 16:24:36 +0800 | [diff] [blame] | 727 | nuc900fb_stop_lcd(fbinfo); |
Wang Qiang | 8661970 | 2010-03-10 15:21:47 -0800 | [diff] [blame] | 728 | msleep(1); |
| 729 | clk_disable(info->clk); |
| 730 | return 0; |
| 731 | } |
| 732 | |
| 733 | static int nuc900fb_resume(struct platform_device *dev) |
| 734 | { |
| 735 | struct fb_info *fbinfo = platform_get_drvdata(dev); |
| 736 | struct nuc900fb_info *fbi = fbinfo->par; |
| 737 | |
| 738 | printk(KERN_INFO "nuc900fb resume\n"); |
| 739 | |
| 740 | clk_enable(fbi->clk); |
| 741 | msleep(1); |
| 742 | |
| 743 | nuc900fb_init_registers(fbinfo); |
Axel Lin | d10df50 | 2011-01-17 16:24:36 +0800 | [diff] [blame] | 744 | nuc900fb_activate_var(fbinfo); |
Wang Qiang | 8661970 | 2010-03-10 15:21:47 -0800 | [diff] [blame] | 745 | |
| 746 | return 0; |
| 747 | } |
| 748 | |
| 749 | #else |
| 750 | #define nuc900fb_suspend NULL |
| 751 | #define nuc900fb_resume NULL |
| 752 | #endif |
| 753 | |
| 754 | static struct platform_driver nuc900fb_driver = { |
| 755 | .probe = nuc900fb_probe, |
| 756 | .remove = nuc900fb_remove, |
| 757 | .suspend = nuc900fb_suspend, |
| 758 | .resume = nuc900fb_resume, |
| 759 | .driver = { |
| 760 | .name = "nuc900-lcd", |
| 761 | .owner = THIS_MODULE, |
| 762 | }, |
| 763 | }; |
| 764 | |
Axel Lin | 4277f2c | 2011-11-26 10:25:54 +0800 | [diff] [blame^] | 765 | module_platform_driver(nuc900fb_driver); |
Wang Qiang | 8661970 | 2010-03-10 15:21:47 -0800 | [diff] [blame] | 766 | |
| 767 | MODULE_DESCRIPTION("Framebuffer driver for the NUC900"); |
| 768 | MODULE_LICENSE("GPL"); |