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#include <linux/gfp.h>
  27
  28#include <asm/irq.h>
  29
  30#include <mach/netx-regs.h>
  31#include <mach/hardware.h>
  32
  33static struct clcd_panel *netx_panel;
  34
  35void netx_clcd_enable(struct clcd_fb *fb)
  36{
  37}
  38
  39int 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
  58int 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
  66void 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
  72void clk_disable(struct clk *clk)
  73{
  74}
  75
  76int clk_set_rate(struct clk *clk, unsigned long rate)
  77{
  78        return 0;
  79}
  80
  81int clk_enable(struct clk *clk)
  82{
  83        return 0;
  84}
  85
  86struct clk *clk_get(struct device *dev, const char *id)
  87{
  88        return dev && strcmp(dev_name(dev), "fb") == 0 ? NULL : ERR_PTR(-ENOENT);
  89}
  90
  91void clk_put(struct clk *clk)
  92{
  93}
  94
  95static struct amba_device fb_device = {
  96        .dev            = {
  97                .init_name = "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
 109int 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}
 115