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 AMBA_AHB_DEVICE(fb, "fb", 0, 0x00104000, { NETX_IRQ_LCD }, NULL);
 96
 97int netx_fb_init(struct clcd_board *board, struct clcd_panel *panel)
 98{
 99	netx_panel = panel;
100	fb_device.dev.platform_data = board;
101	return amba_device_register(&fb_device, &iomem_resource);
102}