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
netx_clcd_enable(struct clcd_fb * fb)34 void netx_clcd_enable(struct clcd_fb *fb)
35 {
36 }
37
netx_clcd_setup(struct clcd_fb * fb)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
netx_clcd_mmap(struct clcd_fb * fb,struct vm_area_struct * vma)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
netx_clcd_remove(struct clcd_fb * fb)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
clk_disable(struct clk * clk)71 void clk_disable(struct clk *clk)
72 {
73 }
74
clk_set_rate(struct clk * clk,unsigned long rate)75 int clk_set_rate(struct clk *clk, unsigned long rate)
76 {
77 return 0;
78 }
79
clk_enable(struct clk * clk)80 int clk_enable(struct clk *clk)
81 {
82 return 0;
83 }
84
clk_get(struct device * dev,const char * id)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
clk_put(struct clk * clk)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
netx_fb_init(struct clcd_board * board,struct clcd_panel * panel)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 }
114