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@@ -0,0 +1,119 @@
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+/*
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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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+
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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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+
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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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+
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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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+
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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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+
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+ BUG_ON(!fb->dev->dev.of_node);
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ return 0;
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+}
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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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+
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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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Daniel Tang