Merge branch 'next-footbridge' of git://aeryn.fluff.org.uk/bjdooks/linux
[linux-2.6] / 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 }