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| /*
| * linux/arch/arm/mach-nspire/clcd.c
| *
| * Copyright (C) 2013 Daniel Tang <tangrs@tangrs.id.au>
| *
| * This program is free software; you can redistribute it and/or modify
| * it under the terms of the GNU General Public License version 2, as
| * published by the Free Software Foundation.
| *
| */
|
| #include <linux/init.h>
| #include <linux/of.h>
| #include <linux/amba/bus.h>
| #include <linux/amba/clcd.h>
| #include <linux/dma-mapping.h>
|
| static struct clcd_panel nspire_cx_lcd_panel = {
| .mode = {
| .name = "Color LCD",
| .refresh = 60,
| .xres = 320,
| .yres = 240,
| .sync = 0,
| .vmode = FB_VMODE_NONINTERLACED,
| .pixclock = 1,
| .hsync_len = 6,
| .vsync_len = 1,
| .right_margin = 50,
| .left_margin = 38,
| .lower_margin = 3,
| .upper_margin = 17,
| },
| .width = 65, /* ~6.50 cm */
| .height = 49, /* ~4.87 cm */
| .tim2 = TIM2_IPC,
| .cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
| .bpp = 16,
| .caps = CLCD_CAP_565,
| };
|
| static struct clcd_panel nspire_classic_lcd_panel = {
| .mode = {
| .name = "Grayscale LCD",
| .refresh = 60,
| .xres = 320,
| .yres = 240,
| .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
| .vmode = FB_VMODE_NONINTERLACED,
| .pixclock = 1,
| .hsync_len = 6,
| .vsync_len = 1,
| .right_margin = 6,
| .left_margin = 6,
| },
| .width = 71, /* 7.11cm */
| .height = 53, /* 5.33cm */
| .tim2 = 0x80007d0,
| .cntl = CNTL_LCDMONO8,
| .bpp = 8,
| .grayscale = 1,
| .caps = CLCD_CAP_5551,
| };
|
| int nspire_clcd_setup(struct clcd_fb *fb)
| {
| struct clcd_panel *panel;
| size_t panel_size;
| const char *type;
| dma_addr_t dma;
| int err;
|
| BUG_ON(!fb->dev->dev.of_node);
|
| err = of_property_read_string(fb->dev->dev.of_node, "lcd-type", &type);
| if (err) {
| pr_err("CLCD: Could not find lcd-type property\n");
| return err;
| }
|
| if (!strcmp(type, "cx")) {
| panel = &nspire_cx_lcd_panel;
| } else if (!strcmp(type, "classic")) {
| panel = &nspire_classic_lcd_panel;
| } else {
| pr_err("CLCD: Unknown lcd-type %s\n", type);
| return -EINVAL;
| }
|
| panel_size = ((panel->mode.xres * panel->mode.yres) * panel->bpp) / 8;
| panel_size = ALIGN(panel_size, PAGE_SIZE);
|
| fb->fb.screen_base = dma_alloc_wc(&fb->dev->dev, panel_size, &dma,
| GFP_KERNEL);
|
| if (!fb->fb.screen_base) {
| pr_err("CLCD: unable to map framebuffer\n");
| return -ENOMEM;
| }
|
| fb->fb.fix.smem_start = dma;
| fb->fb.fix.smem_len = panel_size;
| fb->panel = panel;
|
| return 0;
| }
|
| int nspire_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
| {
| return dma_mmap_wc(&fb->dev->dev, vma, fb->fb.screen_base,
| fb->fb.fix.smem_start, fb->fb.fix.smem_len);
| }
|
| void nspire_clcd_remove(struct clcd_fb *fb)
| {
| dma_free_wc(&fb->dev->dev, fb->fb.fix.smem_len, fb->fb.screen_base,
| fb->fb.fix.smem_start);
| }
|
|
