target/linux/goldfish/patches-2.6.30/0128--ARM-goldfish-fb-Add-fb-driver-for-goldfish.patch

   1 From f8101c780fdc050eda9f93c94f8841de9f384b4f Mon Sep 17 00:00:00 2001
   2 From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@google.com>
   3 Date: Fri, 29 Jun 2007 22:14:27 -0700
   4 Subject: [PATCH 128/134] [ARM] goldfish: fb: Add fb driver for goldfish.
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=utf-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 Supports panning for double buffering.
  10
  11 Signed-off-by: Mike A. Chan <mikechan@google.com>
  12 Signed-off-by: Arve Hjønnevåg <arve@android.com>
  13 ---
  14  drivers/video/Kconfig      |    9 ++
  15  drivers/video/Makefile     |    1 +
  16  drivers/video/goldfishfb.c |  334 ++++++++++++++++++++++++++++++++++++++++++++
  17  3 files changed, 344 insertions(+), 0 deletions(-)
  18  create mode 100644 drivers/video/goldfishfb.c
  19
  20 --- a/drivers/video/Kconfig
  21 +++ b/drivers/video/Kconfig
  22 @@ -2005,6 +2005,15 @@ config FB_XILINX
  23           framebuffer. ML300 carries a 640*480 LCD display on the board,
  24           ML403 uses a standard DB15 VGA connector.
  25
  26 +config FB_GOLDFISH
  27 +       tristate "Goldfish Framebuffer"
  28 +       depends on FB
  29 +       select FB_CFB_FILLRECT
  30 +       select FB_CFB_COPYAREA
  31 +       select FB_CFB_IMAGEBLIT
  32 +       ---help---
  33 +         Framebuffer driver for Goldfish Virtual Platform
  34 +
  35  config FB_COBALT
  36         tristate "Cobalt server LCD frame buffer support"
  37         depends on FB && MIPS_COBALT
  38 --- a/drivers/video/Makefile
  39 +++ b/drivers/video/Makefile
  40 @@ -92,6 +92,7 @@ obj-$(CONFIG_FB_ATMEL)                  += atmel_lcdfb
  41  obj-$(CONFIG_FB_PVR2)             += pvr2fb.o
  42  obj-$(CONFIG_FB_VOODOO1)          += sstfb.o
  43  obj-$(CONFIG_FB_ARMCLCD)         += amba-clcd.o
  44 +obj-$(CONFIG_FB_GOLDFISH)         += goldfishfb.o
  45  obj-$(CONFIG_FB_68328)            += 68328fb.o
  46  obj-$(CONFIG_FB_GBE)              += gbefb.o
  47  obj-$(CONFIG_FB_CIRRUS)                  += cirrusfb.o
  48 --- /dev/null
  49 +++ b/drivers/video/goldfishfb.c
  50 @@ -0,0 +1,334 @@
  51 +/* drivers/video/goldfishfb.c
  52 +**
  53 +** Copyright (C) 2007 Google, Inc.
  54 +**
  55 +** This software is licensed under the terms of the GNU General Public
  56 +** License version 2, as published by the Free Software Foundation, and
  57 +** may be copied, distributed, and modified under those terms.
  58 +**
  59 +** This program is distributed in the hope that it will be useful,
  60 +** but WITHOUT ANY WARRANTY; without even the implied warranty of
  61 +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  62 +** GNU General Public License for more details.
  63 +**
  64 +*/
  65 +
  66 +#include <linux/module.h>
  67 +#include <linux/kernel.h>
  68 +#include <linux/dma-mapping.h>
  69 +#include <linux/errno.h>
  70 +#include <linux/string.h>
  71 +#include <linux/slab.h>
  72 +#include <linux/delay.h>
  73 +#include <linux/mm.h>
  74 +#include <linux/fb.h>
  75 +#include <linux/init.h>
  76 +#include <linux/interrupt.h>
  77 +#include <linux/ioport.h>
  78 +#include <linux/platform_device.h>
  79 +#ifdef CONFIG_ANDROID_POWER
  80 +#include <linux/android_power.h>
  81 +#endif
  82 +
  83 +#include <mach/hardware.h>
  84 +
  85 +enum {
  86 +       FB_GET_WIDTH        = 0x00,
  87 +       FB_GET_HEIGHT       = 0x04,
  88 +       FB_INT_STATUS       = 0x08,
  89 +       FB_INT_ENABLE       = 0x0c,
  90 +       FB_SET_BASE         = 0x10,
  91 +       FB_SET_ROTATION     = 0x14,
  92 +       FB_SET_BLANK        = 0x18,
  93 +       FB_GET_PHYS_WIDTH   = 0x1c,
  94 +       FB_GET_PHYS_HEIGHT  = 0x20,
  95 +
  96 +       FB_INT_VSYNC             = 1U << 0,
  97 +       FB_INT_BASE_UPDATE_DONE  = 1U << 1
  98 +};
  99 +
 100 +struct goldfish_fb {
 101 +       uint32_t reg_base;
 102 +       int irq;
 103 +       spinlock_t lock;
 104 +       wait_queue_head_t wait;
 105 +       int base_update_count;
 106 +       int rotation;
 107 +       struct fb_info fb;
 108 +       u32                     cmap[16];
 109 +#ifdef CONFIG_ANDROID_POWER
 110 +        android_early_suspend_t early_suspend;
 111 +#endif
 112 +};
 113 +
 114 +static irqreturn_t
 115 +goldfish_fb_interrupt(int irq, void *dev_id)
 116 +{
 117 +       unsigned long irq_flags;
 118 +       struct goldfish_fb      *fb = dev_id;
 119 +       uint32_t status;
 120 +
 121 +       spin_lock_irqsave(&fb->lock, irq_flags);
 122 +       status = readl(fb->reg_base + FB_INT_STATUS);
 123 +       if(status & FB_INT_BASE_UPDATE_DONE) {
 124 +               fb->base_update_count++;
 125 +               wake_up(&fb->wait);
 126 +       }
 127 +       spin_unlock_irqrestore(&fb->lock, irq_flags);
 128 +       return status ? IRQ_HANDLED : IRQ_NONE;
 129 +}
 130 +
 131 +static inline u32 convert_bitfield(int val, struct fb_bitfield *bf)
 132 +{
 133 +       unsigned int mask = (1 << bf->length) - 1;
 134 +
 135 +       return (val >> (16 - bf->length) & mask) << bf->offset;
 136 +}
 137 +
 138 +static int
 139 +goldfish_fb_setcolreg(unsigned int regno, unsigned int red, unsigned int green,
 140 +                unsigned int blue, unsigned int transp, struct fb_info *info)
 141 +{
 142 +       struct goldfish_fb *fb = container_of(info, struct goldfish_fb, fb);
 143 +
 144 +       if (regno < 16) {
 145 +               fb->cmap[regno] = convert_bitfield(transp, &fb->fb.var.transp) |
 146 +                                 convert_bitfield(blue, &fb->fb.var.blue) |
 147 +                                 convert_bitfield(green, &fb->fb.var.green) |
 148 +                                 convert_bitfield(red, &fb->fb.var.red);
 149 +               return 0;
 150 +       }
 151 +       else {
 152 +               return 1;
 153 +       }
 154 +}
 155 +
 156 +static int goldfish_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 157 +{
 158 +       if((var->rotate & 1) != (info->var.rotate & 1)) {
 159 +               if((var->xres != info->var.yres) ||
 160 +                  (var->yres != info->var.xres) ||
 161 +                  (var->xres_virtual != info->var.yres) ||
 162 +                  (var->yres_virtual > info->var.xres * 2) ||
 163 +                  (var->yres_virtual < info->var.xres )) {
 164 +                       return -EINVAL;
 165 +               }
 166 +       }
 167 +       else {
 168 +               if((var->xres != info->var.xres) ||
 169 +                  (var->yres != info->var.yres) ||
 170 +                  (var->xres_virtual != info->var.xres) ||
 171 +                  (var->yres_virtual > info->var.yres * 2) ||
 172 +                  (var->yres_virtual < info->var.yres )) {
 173 +                       return -EINVAL;
 174 +               }
 175 +       }
 176 +       if((var->xoffset != info->var.xoffset) ||
 177 +          (var->bits_per_pixel != info->var.bits_per_pixel) ||
 178 +          (var->grayscale != info->var.grayscale)) {
 179 +               return -EINVAL;
 180 +       }
 181 +       return 0;
 182 +}
 183 +
 184 +static int goldfish_fb_set_par(struct fb_info *info)
 185 +{
 186 +       struct goldfish_fb *fb = container_of(info, struct goldfish_fb, fb);
 187 +       if(fb->rotation != fb->fb.var.rotate) {
 188 +               info->fix.line_length = info->var.xres * 2;
 189 +               fb->rotation = fb->fb.var.rotate;
 190 +               writel(fb->rotation, fb->reg_base + FB_SET_ROTATION);
 191 +       }
 192 +       return 0;
 193 +}
 194 +
 195 +
 196 +static int goldfish_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 197 +{
 198 +       unsigned long irq_flags;
 199 +       int base_update_count;
 200 +       struct goldfish_fb *fb = container_of(info, struct goldfish_fb, fb);
 201 +
 202 +       spin_lock_irqsave(&fb->lock, irq_flags);
 203 +       base_update_count = fb->base_update_count;
 204 +       writel(fb->fb.fix.smem_start + fb->fb.var.xres * 2 * var->yoffset, fb->reg_base + FB_SET_BASE);
 205 +       spin_unlock_irqrestore(&fb->lock, irq_flags);
 206 +       wait_event_timeout(fb->wait, fb->base_update_count != base_update_count, HZ / 15);
 207 +       if(fb->base_update_count == base_update_count)
 208 +               printk("goldfish_fb_pan_display: timeout wating for base update\n");
 209 +       return 0;
 210 +}
 211 +
 212 +#ifdef CONFIG_ANDROID_POWER
 213 +static void goldfish_fb_early_suspend(android_early_suspend_t *h)
 214 +{
 215 +       struct goldfish_fb *fb = container_of(h, struct goldfish_fb, early_suspend);
 216 +       writel(1, fb->reg_base + FB_SET_BLANK);
 217 +}
 218 +
 219 +static void goldfish_fb_late_resume(android_early_suspend_t *h)
 220 +{
 221 +       struct goldfish_fb *fb = container_of(h, struct goldfish_fb, early_suspend);
 222 +        writel(0, fb->reg_base + FB_SET_BLANK);
 223 +}
 224 +#endif
 225 +
 226 +static struct fb_ops goldfish_fb_ops = {
 227 +       .owner          = THIS_MODULE,
 228 +       .fb_check_var   = goldfish_fb_check_var,
 229 +       .fb_set_par     = goldfish_fb_set_par,
 230 +       .fb_setcolreg   = goldfish_fb_setcolreg,
 231 +       .fb_pan_display = goldfish_fb_pan_display,
 232 +       .fb_fillrect    = cfb_fillrect,
 233 +       .fb_copyarea    = cfb_copyarea,
 234 +       .fb_imageblit   = cfb_imageblit,
 235 +};
 236 +
 237 +
 238 +static int goldfish_fb_probe(struct platform_device *pdev)
 239 +{
 240 +       int ret;
 241 +       struct resource *r;
 242 +       struct goldfish_fb *fb;
 243 +       size_t framesize;
 244 +       uint32_t width, height;
 245 +       dma_addr_t fbpaddr;
 246 +
 247 +       fb = kzalloc(sizeof(*fb), GFP_KERNEL);
 248 +       if(fb == NULL) {
 249 +               ret = -ENOMEM;
 250 +               goto err_fb_alloc_failed;
 251 +       }
 252 +       spin_lock_init(&fb->lock);
 253 +       init_waitqueue_head(&fb->wait);
 254 +       platform_set_drvdata(pdev, fb);
 255 +
 256 +       r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 257 +       if(r == NULL) {
 258 +               ret = -ENODEV;
 259 +               goto err_no_io_base;
 260 +       }
 261 +       fb->reg_base = IO_ADDRESS(r->start - IO_START);
 262 +
 263 +       fb->irq = platform_get_irq(pdev, 0);
 264 +       if(fb->irq < 0) {
 265 +               ret = -ENODEV;
 266 +               goto err_no_irq;
 267 +       }
 268 +
 269 +       width = readl(fb->reg_base + FB_GET_WIDTH);
 270 +       height = readl(fb->reg_base + FB_GET_HEIGHT);
 271 +
 272 +       fb->fb.fbops            = &goldfish_fb_ops;
 273 +       fb->fb.flags            = FBINFO_FLAG_DEFAULT;
 274 +       fb->fb.pseudo_palette   = fb->cmap;
 275 +       //strncpy(fb->fb.fix.id, clcd_name, sizeof(fb->fb.fix.id));
 276 +       fb->fb.fix.type         = FB_TYPE_PACKED_PIXELS;
 277 +       fb->fb.fix.visual = FB_VISUAL_TRUECOLOR;
 278 +       fb->fb.fix.line_length = width * 2;
 279 +       fb->fb.fix.accel        = FB_ACCEL_NONE;
 280 +       fb->fb.fix.ypanstep = 1;
 281 +
 282 +       fb->fb.var.xres         = width;
 283 +       fb->fb.var.yres         = height;
 284 +       fb->fb.var.xres_virtual = width;
 285 +       fb->fb.var.yres_virtual = height * 2;
 286 +       fb->fb.var.bits_per_pixel = 16;
 287 +       fb->fb.var.activate     = FB_ACTIVATE_NOW;
 288 +       fb->fb.var.height       = readl(fb->reg_base + FB_GET_PHYS_HEIGHT);
 289 +       fb->fb.var.width        = readl(fb->reg_base + FB_GET_PHYS_WIDTH);
 290 +
 291 +       fb->fb.var.red.offset = 11;
 292 +       fb->fb.var.red.length = 5;
 293 +       fb->fb.var.green.offset = 5;
 294 +       fb->fb.var.green.length = 6;
 295 +       fb->fb.var.blue.offset = 0;
 296 +       fb->fb.var.blue.length = 5;
 297 +
 298 +       framesize = width * height * 2 * 2;
 299 +       fb->fb.screen_base = dma_alloc_writecombine(&pdev->dev, framesize,
 300 +                                                   &fbpaddr, GFP_KERNEL);
 301 +       printk("allocating frame buffer %d * %d, got %p\n", width, height, fb->fb.screen_base);
 302 +       if(fb->fb.screen_base == 0) {
 303 +               ret = -ENOMEM;
 304 +               goto err_alloc_screen_base_failed;
 305 +       }
 306 +       fb->fb.fix.smem_start = fbpaddr;
 307 +       fb->fb.fix.smem_len = framesize;
 308 +
 309 +       ret = fb_set_var(&fb->fb, &fb->fb.var);
 310 +       if(ret)
 311 +               goto err_fb_set_var_failed;
 312 +
 313 +       ret = request_irq(fb->irq, goldfish_fb_interrupt, IRQF_SHARED, pdev->name, fb);
 314 +       if(ret)
 315 +               goto err_request_irq_failed;
 316 +
 317 +       writel(FB_INT_BASE_UPDATE_DONE, fb->reg_base + FB_INT_ENABLE);
 318 +       goldfish_fb_pan_display(&fb->fb.var, &fb->fb); // updates base
 319 +
 320 +       ret = register_framebuffer(&fb->fb);
 321 +       if(ret)
 322 +               goto err_register_framebuffer_failed;
 323 +
 324 +#ifdef CONFIG_ANDROID_POWER
 325 +       fb->early_suspend.suspend = goldfish_fb_early_suspend;
 326 +       fb->early_suspend.resume = goldfish_fb_late_resume;
 327 +       android_register_early_suspend(&fb->early_suspend);
 328 +#endif
 329 +
 330 +       return 0;
 331 +
 332 +
 333 +err_register_framebuffer_failed:
 334 +       free_irq(fb->irq, fb);
 335 +err_request_irq_failed:
 336 +err_fb_set_var_failed:
 337 +       dma_free_writecombine(&pdev->dev, framesize, fb->fb.screen_base, fb->fb.fix.smem_start);
 338 +err_alloc_screen_base_failed:
 339 +err_no_irq:
 340 +err_no_io_base:
 341 +       kfree(fb);
 342 +err_fb_alloc_failed:
 343 +       return ret;
 344 +}
 345 +
 346 +static int goldfish_fb_remove(struct platform_device *pdev)
 347 +{
 348 +       size_t framesize;
 349 +       struct goldfish_fb *fb = platform_get_drvdata(pdev);
 350 +
 351 +       framesize = fb->fb.var.xres_virtual * fb->fb.var.yres_virtual * 2;
 352 +
 353 +#ifdef CONFIG_ANDROID_POWER
 354 +        android_unregister_early_suspend(&fb->early_suspend);
 355 +#endif
 356 +       unregister_framebuffer(&fb->fb);
 357 +       free_irq(fb->irq, fb);
 358 +       dma_free_writecombine(&pdev->dev, framesize, fb->fb.screen_base, fb->fb.fix.smem_start);
 359 +       kfree(fb);
 360 +       return 0;
 361 +}
 362 +
 363 +
 364 +static struct platform_driver goldfish_fb_driver = {
 365 +       .probe          = goldfish_fb_probe,
 366 +       .remove         = goldfish_fb_remove,
 367 +       .driver = {
 368 +               .name = "goldfish_fb"
 369 +       }
 370 +};
 371 +
 372 +static int __init goldfish_fb_init(void)
 373 +{
 374 +       return platform_driver_register(&goldfish_fb_driver);
 375 +}
 376 +
 377 +static void __exit goldfish_fb_exit(void)
 378 +{
 379 +       platform_driver_unregister(&goldfish_fb_driver);
 380 +}
 381 +
 382 +module_init(goldfish_fb_init);
 383 +module_exit(goldfish_fb_exit);
 384 +