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
  26 #include <asm/arch/netx-regs.h>
  27 #include <asm/hardware.h>
  28
  29 struct clk {};
  30
  31 static struct clk fb_clk;
  32
  33 static struct clcd_panel *netx_panel;
  34
  35 void netx_clcd_enable(struct clcd_fb *fb)
  36 {
  37 }
  38
  39 int netx_clcd_setup(struct clcd_fb *fb)
  40 {
  41         dma_addr_t dma;
  42
  43         fb->panel = netx_panel;
  44
  45         fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, 1024*1024,
  46                                                     &dma, GFP_KERNEL);
  47         if (!fb->fb.screen_base) {
  48                 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
  49                 return -ENOMEM;
  50         }
  51
  52         fb->fb.fix.smem_start   = dma;
  53         fb->fb.fix.smem_len     = 1024*1024;
  54
  55         return 0;
  56 }
  57
  58 int netx_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
  59 {
  60         return dma_mmap_writecombine(&fb->dev->dev, vma,
  61                                      fb->fb.screen_base,
  62                                      fb->fb.fix.smem_start,
  63                                      fb->fb.fix.smem_len);
  64 }
  65
  66 void netx_clcd_remove(struct clcd_fb *fb)
  67 {
  68         dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
  69                               fb->fb.screen_base, fb->fb.fix.smem_start);
  70 }
  71
  72 void clk_disable(struct clk *clk)
  73 {
  74 }
  75
  76 int clk_set_rate(struct clk *clk, unsigned long rate)
  77 {
  78         return 0;
  79 }
  80
  81 int clk_enable(struct clk *clk)
  82 {
  83         return 0;
  84 }
  85
  86 struct clk *clk_get(struct device *dev, const char *id)
  87 {
  88         return &fb_clk;
  89 }
  90
  91 void clk_put(struct clk *clk)
  92 {
  93 }
  94
  95 static struct amba_device fb_device = {
  96         .dev            = {
  97                 .bus_id = "fb",
  98                 .coherent_dma_mask = ~0,
  99         },
 100         .res            = {
 101                 .start  = 0x00104000,
 102                 .end    = 0x00104fff,
 103                 .flags  = IORESOURCE_MEM,
 104         },
 105         .irq            = { NETX_IRQ_LCD, NO_IRQ },
 106         .periphid       = 0x10112400,
 107 };
 108
 109 int netx_fb_init(struct clcd_board *board, struct clcd_panel *panel)
 110 {
 111         netx_panel = panel;
 112         fb_device.dev.platform_data = board;
 113         return amba_device_register(&fb_device, &iomem_resource);
 114 }