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9851ca57 DT |
1 | /* |
2 | * linux/arch/arm/mach-nspire/clcd.c | |
3 | * | |
4 | * Copyright (C) 2013 Daniel Tang <tangrs@tangrs.id.au> | |
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, as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | */ | |
11 | ||
12 | #include <linux/init.h> | |
13 | #include <linux/of.h> | |
14 | #include <linux/amba/bus.h> | |
15 | #include <linux/amba/clcd.h> | |
16 | #include <linux/dma-mapping.h> | |
17 | ||
18 | static struct clcd_panel nspire_cx_lcd_panel = { | |
19 | .mode = { | |
20 | .name = "Color LCD", | |
21 | .refresh = 60, | |
22 | .xres = 320, | |
23 | .yres = 240, | |
24 | .sync = 0, | |
25 | .vmode = FB_VMODE_NONINTERLACED, | |
26 | .pixclock = 1, | |
27 | .hsync_len = 6, | |
28 | .vsync_len = 1, | |
29 | .right_margin = 50, | |
30 | .left_margin = 38, | |
31 | .lower_margin = 3, | |
32 | .upper_margin = 17, | |
33 | }, | |
34 | .width = 65, /* ~6.50 cm */ | |
35 | .height = 49, /* ~4.87 cm */ | |
36 | .tim2 = TIM2_IPC, | |
37 | .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1), | |
38 | .bpp = 16, | |
39 | .caps = CLCD_CAP_565, | |
40 | }; | |
41 | ||
42 | static struct clcd_panel nspire_classic_lcd_panel = { | |
43 | .mode = { | |
44 | .name = "Grayscale LCD", | |
45 | .refresh = 60, | |
46 | .xres = 320, | |
47 | .yres = 240, | |
48 | .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, | |
49 | .vmode = FB_VMODE_NONINTERLACED, | |
50 | .pixclock = 1, | |
51 | .hsync_len = 6, | |
52 | .vsync_len = 1, | |
53 | .right_margin = 6, | |
54 | .left_margin = 6, | |
55 | }, | |
56 | .width = 71, /* 7.11cm */ | |
57 | .height = 53, /* 5.33cm */ | |
58 | .tim2 = 0x80007d0, | |
59 | .cntl = CNTL_LCDMONO8, | |
60 | .bpp = 8, | |
61 | .grayscale = 1, | |
62 | .caps = CLCD_CAP_5551, | |
63 | }; | |
64 | ||
65 | int nspire_clcd_setup(struct clcd_fb *fb) | |
66 | { | |
67 | struct clcd_panel *panel; | |
68 | size_t panel_size; | |
69 | const char *type; | |
70 | dma_addr_t dma; | |
71 | int err; | |
72 | ||
73 | BUG_ON(!fb->dev->dev.of_node); | |
74 | ||
75 | err = of_property_read_string(fb->dev->dev.of_node, "lcd-type", &type); | |
76 | if (err) { | |
77 | pr_err("CLCD: Could not find lcd-type property\n"); | |
78 | return err; | |
79 | } | |
80 | ||
81 | if (!strcmp(type, "cx")) { | |
82 | panel = &nspire_cx_lcd_panel; | |
83 | } else if (!strcmp(type, "classic")) { | |
84 | panel = &nspire_classic_lcd_panel; | |
85 | } else { | |
86 | pr_err("CLCD: Unknown lcd-type %s\n", type); | |
87 | return -EINVAL; | |
88 | } | |
89 | ||
90 | panel_size = ((panel->mode.xres * panel->mode.yres) * panel->bpp) / 8; | |
91 | panel_size = ALIGN(panel_size, PAGE_SIZE); | |
92 | ||
f6e45661 LR |
93 | fb->fb.screen_base = dma_alloc_wc(&fb->dev->dev, panel_size, &dma, |
94 | GFP_KERNEL); | |
9851ca57 DT |
95 | |
96 | if (!fb->fb.screen_base) { | |
97 | pr_err("CLCD: unable to map framebuffer\n"); | |
98 | return -ENOMEM; | |
99 | } | |
100 | ||
101 | fb->fb.fix.smem_start = dma; | |
102 | fb->fb.fix.smem_len = panel_size; | |
103 | fb->panel = panel; | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | int nspire_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma) | |
109 | { | |
f6e45661 LR |
110 | return dma_mmap_wc(&fb->dev->dev, vma, fb->fb.screen_base, |
111 | fb->fb.fix.smem_start, fb->fb.fix.smem_len); | |
9851ca57 DT |
112 | } |
113 | ||
114 | void nspire_clcd_remove(struct clcd_fb *fb) | |
115 | { | |
f6e45661 LR |
116 | dma_free_wc(&fb->dev->dev, fb->fb.fix.smem_len, fb->fb.screen_base, |
117 | fb->fb.fix.smem_start); | |
9851ca57 | 118 | } |