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/slab.h>
  22 #include <linux/vmalloc.h>
  23 #include <linux/delay.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/fb.h>
  26 #include <linux/init.h>
  27 #include <linux/platform_device.h>
  28
  29 #include <asm/uaccess.h>
  30 #include "sdum.h"
  31 #include "fbcommon.h"
  32
  33 static u32 colreg[16];
  34
  35 static struct fb_var_screeninfo rgbfb_var __initdata = {
  36         .xres = LCD_X_RES,
  37         .yres = LCD_Y_RES,
  38         .xres_virtual = LCD_X_RES,
  39         .yres_virtual = LCD_Y_RES,
  40         .bits_per_pixel = 32,
  41         .red.offset = 16,
  42         .red.length = 8,
  43         .green.offset = 8,
  44         .green.length = 8,
  45         .blue.offset = 0,
  46         .blue.length = 8,
  47         .left_margin = 0,
  48         .right_margin = 0,
  49         .upper_margin = 0,
  50         .lower_margin = 0,
  51         .vmode = FB_VMODE_NONINTERLACED,
  52 };
  53 static struct fb_fix_screeninfo rgbfb_fix __initdata = {
  54         .id = "RGBFB",
  55         .line_length = LCD_X_RES * LCD_BBP,
  56         .type = FB_TYPE_PACKED_PIXELS,
  57         .visual = FB_VISUAL_TRUECOLOR,
  58         .xpanstep = 0,
  59         .ypanstep = 0,
  60         .ywrapstep = 0,
  61         .accel = FB_ACCEL_NONE,
  62 };
  63
  64 static int channel_owned;
  65
  66 static int no_cursor(struct fb_info *info, struct fb_cursor *cursor)
  67 {
  68         return 0;
  69 }
  70
  71 static int rgbfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
  72                            u_int transp, struct fb_info *info)
  73 {
  74         if (regno > 15)
  75                 return 1;
  76
  77         colreg[regno] = ((red & 0xff00) << 8) | (green & 0xff00) |
  78             ((blue & 0xff00) >> 8);
  79         return 0;
  80 }
  81
  82 static int rgbfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
  83 {
  84         return pnx4008_sdum_mmap(info, vma, NULL);
  85 }
  86
  87 static struct fb_ops rgbfb_ops = {
  88         .fb_mmap = rgbfb_mmap,
  89         .fb_setcolreg = rgbfb_setcolreg,
  90         .fb_fillrect = cfb_fillrect,
  91         .fb_copyarea = cfb_copyarea,
  92         .fb_imageblit = cfb_imageblit,
  93 };
  94
  95 static int rgbfb_remove(struct platform_device *pdev)
  96 {
  97         struct fb_info *info = platform_get_drvdata(pdev);
  98
  99         if (info) {
 100                 unregister_framebuffer(info);
 101                 fb_dealloc_cmap(&info->cmap);
 102                 framebuffer_release(info);
 103                 platform_set_drvdata(pdev, NULL);
 104                 kfree(info);
 105         }
 106
 107         pnx4008_free_dum_channel(channel_owned, pdev->id);
 108         pnx4008_set_dum_exit_notification(pdev->id);
 109
 110         return 0;
 111 }
 112
 113 static int __devinit rgbfb_probe(struct platform_device *pdev)
 114 {
 115         struct fb_info *info;
 116         struct dumchannel_uf chan_uf;
 117         int ret;
 118         char *option;
 119
 120         info = framebuffer_alloc(sizeof(u32) * 16, &pdev->dev);
 121         if (!info) {
 122                 ret = -ENOMEM;
 123                 goto err;
 124         }
 125
 126         pnx4008_get_fb_addresses(FB_TYPE_RGB, (void **)&info->screen_base,
 127                                  (dma_addr_t *) &rgbfb_fix.smem_start,
 128                                  &rgbfb_fix.smem_len);
 129
 130         if ((ret = pnx4008_alloc_dum_channel(pdev->id)) < 0)
 131                 goto err0;
 132         else {
 133                 channel_owned = ret;
 134                 chan_uf.channelnr = channel_owned;
 135                 chan_uf.dirty = (u32 *) NULL;
 136                 chan_uf.source = (u32 *) rgbfb_fix.smem_start;
 137                 chan_uf.x_offset = 0;
 138                 chan_uf.y_offset = 0;
 139                 chan_uf.width = LCD_X_RES;
 140                 chan_uf.height = LCD_Y_RES;
 141
 142                 if ((ret = pnx4008_put_dum_channel_uf(chan_uf, pdev->id))< 0)
 143                         goto err1;
 144
 145                 if ((ret =
 146                      pnx4008_set_dum_channel_sync(channel_owned, CONF_SYNC_ON,
 147                                                   pdev->id)) < 0)
 148                         goto err1;
 149
 150                 if ((ret =
 151                      pnx4008_set_dum_channel_dirty_detect(channel_owned,
 152                                                          CONF_DIRTYDETECTION_ON,
 153                                                          pdev->id)) < 0)
 154                         goto err1;
 155         }
 156
 157         if (!fb_get_options("pnxrgbfb", &option) && option &&
 158                         !strcmp(option, "nocursor"))
 159                 rgbfb_ops.fb_cursor = no_cursor;
 160
 161         info->node = -1;
 162         info->flags = FBINFO_FLAG_DEFAULT;
 163         info->fbops = &rgbfb_ops;
 164         info->fix = rgbfb_fix;
 165         info->var = rgbfb_var;
 166         info->screen_size = rgbfb_fix.smem_len;
 167         info->pseudo_palette = info->par;
 168         info->par = NULL;
 169
 170         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 171         if (ret < 0)
 172                 goto err2;
 173
 174         ret = register_framebuffer(info);
 175         if (ret < 0)
 176                 goto err3;
 177         platform_set_drvdata(pdev, info);
 178
 179         return 0;
 180
 181 err3:
 182         fb_dealloc_cmap(&info->cmap);
 183 err2:
 184         framebuffer_release(info);
 185 err1:
 186         pnx4008_free_dum_channel(channel_owned, pdev->id);
 187 err0:
 188         kfree(info);
 189 err:
 190         return ret;
 191 }
 192
 193 static struct platform_driver rgbfb_driver = {
 194         .driver = {
 195                 .name = "pnx4008-rgbfb",
 196         },
 197         .probe = rgbfb_probe,
 198         .remove = rgbfb_remove,
 199 };
 200
 201 static int __init rgbfb_init(void)
 202 {
 203         return platform_driver_register(&rgbfb_driver);
 204 }
 205
 206 static void __exit rgbfb_exit(void)
 207 {
 208         platform_driver_unregister(&rgbfb_driver);
 209 }
 210
 211 module_init(rgbfb_init);
 212 module_exit(rgbfb_exit);
 213
 214 MODULE_LICENSE("GPL");