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