LXR linux/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
  32static struct clcd_panel *netx_panel;
  33
  34void netx_clcd_enable(struct clcd_fb *fb)
  35{
  36}
  37
  38int 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
  57int 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
  65void 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
  71void clk_disable(struct clk *clk)
  72{
  73}
  74
  75int clk_set_rate(struct clk *clk, unsigned long rate)
  76{
  77        return 0;
  78}
  79
  80int clk_enable(struct clk *clk)
  81{
  82        return 0;
  83}
  84
  85struct 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
  90void clk_put(struct clk *clk)
  91{
  92}
  93
  94static 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
 108int 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}
 114