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