drivers/video/pnx4008/pnxrgbfb.c

   1 /*
   2  * drivers/video/pnx4008/pnxrgbfb.c
   3  *
   4  * PNX4008's framebuffer support
   5  *
   6  * Author: Grigory Tolstolytkin <gtolstolytkin@ru.mvista.com>
   7  * Based on Philips Semiconductors's code
   8  *
   9  * Copyrght (c) 2005 MontaVista Software, Inc.
  10  * Copyright (c) 2005 Philips Semiconductors
  11  * This file is licensed under the terms of the GNU General Public License
  12  * version 2. This program is licensed "as is" without any warranty of any
  13  * kind, whether express or implied.
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/kernel.h>
  18 #include <linux/errno.h>
  19 #include <linux/string.h>
  20 #include <linux/mm.h>
  21 #include <linux/vmalloc.h>
  22 #include <linux/delay.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/fb.h>
  25 #include <linux/init.h>
  26 #include <linux/platform_device.h>
  27
  28 #include "sdum.h"
  29 #include "fbcommon.h"
  30
  31 static u32 colreg[16];
  32
  33 static struct fb_var_screeninfo rgbfb_var __initdata = {
  34         .xres = LCD_X_RES,
  35         .yres = LCD_Y_RES,
  36         .xres_virtual = LCD_X_RES,
  37         .yres_virtual = LCD_Y_RES,
  38         .bits_per_pixel = 32,
  39         .red.offset = 16,
  40         .red.length = 8,
  41         .green.offset = 8,
  42         .green.length = 8,
  43         .blue.offset = 0,
  44         .blue.length = 8,
  45         .left_margin = 0,
  46         .right_margin = 0,
  47         .upper_margin = 0,
  48         .lower_margin = 0,
  49         .vmode = FB_VMODE_NONINTERLACED,
  50 };
  51 static struct fb_fix_screeninfo rgbfb_fix __initdata = {
  52         .id = "RGBFB",
  53         .line_length = LCD_X_RES * LCD_BBP,
  54         .type = FB_TYPE_PACKED_PIXELS,
  55         .visual = FB_VISUAL_TRUECOLOR,
  56         .xpanstep = 0,
  57         .ypanstep = 0,
  58         .ywrapstep = 0,
  59         .accel = FB_ACCEL_NONE,
  60 };
  61
  62 static int channel_owned;
  63
  64 static int no_cursor(struct fb_info *info, struct fb_cursor *cursor)
  65 {
  66         return 0;
  67 }
  68
  69 static int rgbfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  70                            u_int transp, struct fb_info *info)
  71 {
  72         if (regno > 15)
  73                 return 1;
  74
  75         colreg[regno] = ((red & 0xff00) << 8) | (green & 0xff00) |
  76             ((blue & 0xff00) >> 8);
  77         return 0;
  78 }
  79
  80 static int rgbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
  81 {
  82         return pnx4008_sdum_mmap(info, vma, NULL);
  83 }
  84
  85 static struct fb_ops rgbfb_ops = {
  86         .fb_mmap = rgbfb_mmap,
  87         .fb_setcolreg = rgbfb_setcolreg,
  88         .fb_fillrect = cfb_fillrect,
  89         .fb_copyarea = cfb_copyarea,
  90         .fb_imageblit = cfb_imageblit,
  91 };
  92
  93 static int rgbfb_remove(struct platform_device *pdev)
  94 {
  95         struct fb_info *info = platform_get_drvdata(pdev);
  96
  97         if (info) {
  98                 unregister_framebuffer(info);
  99                 fb_dealloc_cmap(&info->cmap);
 100                 framebuffer_release(info);
 101                 platform_set_drvdata(pdev, NULL);
 102         }
 103
 104         pnx4008_free_dum_channel(channel_owned, pdev->id);
 105         pnx4008_set_dum_exit_notification(pdev->id);
 106
 107         return 0;
 108 }
 109
 110 static int __devinit rgbfb_probe(struct platform_device *pdev)
 111 {
 112         struct fb_info *info;
 113         struct dumchannel_uf chan_uf;
 114         int ret;
 115         char *option;
 116
 117         info = framebuffer_alloc(sizeof(u32) * 16, &pdev->dev);
 118         if (!info) {
 119                 ret = -ENOMEM;
 120                 goto err;
 121         }
 122
 123         pnx4008_get_fb_addresses(FB_TYPE_RGB, (void **)&info->screen_base,
 124                                  (dma_addr_t *) &rgbfb_fix.smem_start,
 125                                  &rgbfb_fix.smem_len);
 126
 127         if ((ret = pnx4008_alloc_dum_channel(pdev->id)) < 0)
 128                 goto err0;
 129         else {
 130                 channel_owned = ret;
 131                 chan_uf.channelnr = channel_owned;
 132                 chan_uf.dirty = (u32 *) NULL;
 133                 chan_uf.source = (u32 *) rgbfb_fix.smem_start;
 134                 chan_uf.x_offset = 0;
 135                 chan_uf.y_offset = 0;
 136                 chan_uf.width = LCD_X_RES;
 137                 chan_uf.height = LCD_Y_RES;
 138
 139                 if ((ret = pnx4008_put_dum_channel_uf(chan_uf, pdev->id))< 0)
 140                         goto err1;
 141
 142                 if ((ret =
 143                      pnx4008_set_dum_channel_sync(channel_owned, CONF_SYNC_ON,
 144                                                   pdev->id)) < 0)
 145                         goto err1;
 146
 147                 if ((ret =
 148                      pnx4008_set_dum_channel_dirty_detect(channel_owned,
 149                                                          CONF_DIRTYDETECTION_ON,
 150                                                          pdev->id)) < 0)
 151                         goto err1;
 152         }
 153
 154         if (!fb_get_options("pnxrgbfb", &option) && option &&
 155                         !strcmp(option, "nocursor"))
 156                 rgbfb_ops.fb_cursor = no_cursor;
 157
 158         info->node = -1;
 159         info->flags = FBINFO_FLAG_DEFAULT;
 160         info->fbops = &rgbfb_ops;
 161         info->fix = rgbfb_fix;
 162         info->var = rgbfb_var;
 163         info->screen_size = rgbfb_fix.smem_len;
 164         info->pseudo_palette = info->par;
 165         info->par = NULL;
 166
 167         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 168         if (ret < 0)
 169                 goto err1;
 170
 171         ret = register_framebuffer(info);
 172         if (ret < 0)
 173                 goto err2;
 174         platform_set_drvdata(pdev, info);
 175
 176         return 0;
 177
 178 err2:
 179         fb_dealloc_cmap(&info->cmap);
 180 err1:
 181         pnx4008_free_dum_channel(channel_owned, pdev->id);
 182 err0:
 183         framebuffer_release(info);
 184 err:
 185         return ret;
 186 }
 187
 188 static struct platform_driver rgbfb_driver = {
 189         .driver = {
 190                 .name = "pnx4008-rgbfb",
 191         },
 192         .probe = rgbfb_probe,
 193         .remove = rgbfb_remove,
 194 };
 195
 196 module_platform_driver(rgbfb_driver);
 197
 198 MODULE_LICENSE("GPL");