arch/arm/mach-netx/fb.c

   1 /*
   2  * arch/arm/mach-netx/fb.c
   3  *
   4  * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
   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 version 2
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #include <linux/device.h>
  21 #include <linux/init.h>
  22 #include <linux/dma-mapping.h>
  23 #include <linux/amba/bus.h>
  24 #include <linux/amba/clcd.h>
  25 #include <linux/err.h>
  26
  27 #include <asm/irq.h>
  28
  29 #include <mach/netx-regs.h>
  30 #include <mach/hardware.h>
  31
  32 static struct clcd_panel *netx_panel;
  33
  34 void netx_clcd_enable(struct clcd_fb *fb)
  35 {
  36 }
  37
  38 int netx_clcd_setup(struct clcd_fb *fb)
  39 {
  40         dma_addr_t dma;
  41
  42         fb->panel = netx_panel;
  43
  44         fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, 1024*1024,
  45                                                     &dma, GFP_KERNEL);
  46         if (!fb->fb.screen_base) {
  47                 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
  48                 return -ENOMEM;
  49         }
  50
  51         fb->fb.fix.smem_start   = dma;
  52         fb->fb.fix.smem_len     = 1024*1024;
  53
  54         return 0;
  55 }
  56
  57 int netx_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
  58 {
  59         return dma_mmap_writecombine(&fb->dev->dev, vma,
  60                                      fb->fb.screen_base,
  61                                      fb->fb.fix.smem_start,
  62                                      fb->fb.fix.smem_len);
  63 }
  64
  65 void netx_clcd_remove(struct clcd_fb *fb)
  66 {
  67         dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
  68                               fb->fb.screen_base, fb->fb.fix.smem_start);
  69 }
  70
  71 void clk_disable(struct clk *clk)
  72 {
  73 }
  74
  75 int clk_set_rate(struct clk *clk, unsigned long rate)
  76 {
  77         return 0;
  78 }
  79
  80 int clk_enable(struct clk *clk)
  81 {
  82         return 0;
  83 }
  84
  85 struct clk *clk_get(struct device *dev, const char *id)
  86 {
  87         return dev && strcmp(dev_name(dev), "fb") == 0 ? NULL : ERR_PTR(-ENOENT);
  88 }
  89
  90 void clk_put(struct clk *clk)
  91 {
  92 }
  93
  94 static struct amba_device fb_device = {
  95         .dev            = {
  96                 .init_name = "fb",
  97                 .coherent_dma_mask = ~0,
  98         },
  99         .res            = {
 100                 .start  = 0x00104000,
 101                 .end    = 0x00104fff,
 102                 .flags  = IORESOURCE_MEM,
 103         },
 104         .irq            = { NETX_IRQ_LCD, NO_IRQ },
 105         .periphid       = 0x10112400,
 106 };
 107
 108 int netx_fb_init(struct clcd_board *board, struct clcd_panel *panel)
 109 {
 110         netx_panel = panel;
 111         fb_device.dev.platform_data = board;
 112         return amba_device_register(&fb_device, &iomem_resource);
 113 }