| Daniel Tang | 9851ca5 | 2013-06-11 18:40:17 +1000 | [diff] [blame] | 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 | |
| 93 | fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, |
| 94 | panel_size, &dma, GFP_KERNEL); |
| 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 | { |
| 110 | return dma_mmap_writecombine(&fb->dev->dev, vma, |
| 111 | fb->fb.screen_base, fb->fb.fix.smem_start, |
| 112 | fb->fb.fix.smem_len); |
| 113 | } |
| 114 | |
| 115 | void nspire_clcd_remove(struct clcd_fb *fb) |
| 116 | { |
| 117 | dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len, |
| 118 | fb->fb.screen_base, fb->fb.fix.smem_start); |
| 119 | } |