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path: root/drivers/video/tx3912fb.c
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Diffstat (limited to 'drivers/video/tx3912fb.c')
-rw-r--r--drivers/video/tx3912fb.c328
1 files changed, 328 insertions, 0 deletions
diff --git a/drivers/video/tx3912fb.c b/drivers/video/tx3912fb.c
new file mode 100644
index 000000000000..39d9ca71856b
--- /dev/null
+++ b/drivers/video/tx3912fb.c
@@ -0,0 +1,328 @@
+/*
+ * drivers/video/tx3912fb.c
+ *
+ * Copyright (C) 1999 Harald Koerfgen
+ * Copyright (C) 2001 Steven Hill (sjhill@realitydiluted.com)
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ * Framebuffer for LCD controller in TMPR3912/05 and PR31700 processors
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/tty.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/pm.h>
+#include <linux/fb.h>
+#include <asm/io.h>
+#include <asm/bootinfo.h>
+#include <asm/uaccess.h>
+#include <asm/tx3912.h>
+#include <video/tx3912.h>
+
+/*
+ * Frame buffer, palette and console structures
+ */
+static struct fb_info fb_info;
+static u32 cfb8[16];
+
+static struct fb_fix_screeninfo tx3912fb_fix __initdata = {
+ .id = "tx3912fb",
+ .smem_len = ((240 * 320)/2),
+ .type = FB_TYPE_PACKED_PIXELS,
+ .visual = FB_VISUAL_TRUECOLOR,
+ .xpanstep = 1,
+ .ypanstep = 1,
+ .ywrapstep = 1,
+ .accel = FB_ACCEL_NONE,
+};
+
+static struct fb_var_screeninfo tx3912fb_var = {
+ .xres = 240,
+ .yres = 320,
+ .xres_virtual = 240,
+ .yres_virtual = 320,
+ .bits_per_pixel =4,
+ .red = { 0, 4, 0 }, /* ??? */
+ .green = { 0, 4, 0 },
+ .blue = { 0, 4, 0 },
+ .activate = FB_ACTIVATE_NOW,
+ .width = -1,
+ .height = -1,
+ .pixclock = 20000,
+ .left_margin = 64,
+ .right_margin = 64,
+ .upper_margin = 32,
+ .lower_margin = 32,
+ .hsync_len = 64,
+ .vsync_len = 2,
+ .vmode = FB_VMODE_NONINTERLACED,
+};
+
+/*
+ * Interface used by the world
+ */
+int tx3912fb_init(void);
+
+static int tx3912fb_setcolreg(u_int regno, u_int red, u_int green,
+ u_int blue, u_int transp,
+ struct fb_info *info);
+
+/*
+ * Macros
+ */
+#define get_line_length(xres_virtual, bpp) \
+ (u_long) (((int) xres_virtual * (int) bpp + 7) >> 3)
+
+/*
+ * Frame buffer operations structure used by console driver
+ */
+static struct fb_ops tx3912fb_ops = {
+ .owner = THIS_MODULE,
+ .fb_setcolreg = tx3912fb_setcolreg,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_cursor = soft_cursor,
+};
+
+static int tx3912fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ /*
+ * Memory limit
+ */
+ line_length =
+ get_line_length(var->xres_virtual, var->bits_per_pixel);
+ if ((line_length * var->yres_virtual) > info->fix.smem_len)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int tx3912fb_set_par(struct fb_info *info)
+{
+ u_long tx3912fb_paddr = 0;
+
+ /* Disable the video logic */
+ outl(inl(TX3912_VIDEO_CTRL1) &
+ ~(TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON),
+ TX3912_VIDEO_CTRL1);
+ udelay(200);
+
+ /* Set start address for DMA transfer */
+ outl(tx3912fb_paddr, TX3912_VIDEO_CTRL3);
+
+ /* Set end address for DMA transfer */
+ outl((tx3912fb_paddr + tx3912fb_fix.smem_len + 1), TX3912_VIDEO_CTRL4);
+
+ /* Set the pixel depth */
+ switch (info->var.bits_per_pixel) {
+ case 1:
+ /* Monochrome */
+ outl(inl(TX3912_VIDEO_CTRL1) &
+ ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+ info->fix.visual = FB_VISUAL_MONO10;
+ break;
+ case 4:
+ /* 4-bit gray */
+ outl(inl(TX3912_VIDEO_CTRL1) &
+ ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+ outl(inl(TX3912_VIDEO_CTRL1) |
+ TX3912_VIDEO_CTRL1_BITSEL_4BIT_GRAY,
+ TX3912_VIDEO_CTRL1);
+ info->fix.visual = FB_VISUAL_TRUECOLOR;
+ break;
+ case 8:
+ /* 8-bit color */
+ outl(inl(TX3912_VIDEO_CTRL1) &
+ ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+ outl(inl(TX3912_VIDEO_CTRL1) |
+ TX3912_VIDEO_CTRL1_BITSEL_8BIT_COLOR,
+ TX3912_VIDEO_CTRL1);
+ info->fix.visual = FB_VISUAL_TRUECOLOR;
+ break;
+ case 2:
+ default:
+ /* 2-bit gray */
+ outl(inl(TX3912_VIDEO_CTRL1) &
+ ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+ outl(inl(TX3912_VIDEO_CTRL1) |
+ TX3912_VIDEO_CTRL1_BITSEL_2BIT_GRAY,
+ TX3912_VIDEO_CTRL1);
+ info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+ break;
+ }
+
+ /* Enable the video clock */
+ outl(inl(TX3912_CLK_CTRL) | TX3912_CLK_CTRL_ENVIDCLK,
+ TX3912_CLK_CTRL);
+
+ /* Unfreeze video logic and enable DF toggle */
+ outl(inl(TX3912_VIDEO_CTRL1) &
+ ~(TX3912_VIDEO_CTRL1_ENFREEZEFRAME |
+ TX3912_VIDEO_CTRL1_DFMODE)
+ , TX3912_VIDEO_CTRL1);
+ udelay(200);
+
+ /* Enable the video logic */
+ outl(inl(TX3912_VIDEO_CTRL1) |
+ (TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON),
+ TX3912_VIDEO_CTRL1);
+
+ info->fix.line_length = get_line_length(var->xres_virtual,
+ var->bits_per_pixel);
+}
+
+/*
+ * Set a single color register
+ */
+static int tx3912fb_setcolreg(u_int regno, u_int red, u_int green,
+ u_int blue, u_int transp,
+ struct fb_info *info)
+{
+ if (regno > 255)
+ return 1;
+
+ if (regno < 16)
+ ((u32 *)(info->pseudo_palette))[regno] = ((red & 0xe000) >> 8)
+ | ((green & 0xe000) >> 11)
+ | ((blue & 0xc000) >> 14);
+ return 0;
+}
+
+int __init tx3912fb_setup(char *options);
+
+/*
+ * Initialization of the framebuffer
+ */
+int __init tx3912fb_init(void)
+{
+ u_long tx3912fb_paddr = 0;
+ int size = (info->var.bits_per_pixel == 8) ? 256 : 16;
+ char *option = NULL;
+
+ if (fb_get_options("tx3912fb", &option))
+ return -ENODEV;
+ tx3912fb_setup(option);
+
+ /* Disable the video logic */
+ outl(inl(TX3912_VIDEO_CTRL1) &
+ ~(TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON),
+ TX3912_VIDEO_CTRL1);
+ udelay(200);
+
+ /* Set start address for DMA transfer */
+ outl(tx3912fb_paddr, TX3912_VIDEO_CTRL3);
+
+ /* Set end address for DMA transfer */
+ outl((tx3912fb_paddr + tx3912fb_fix.smem_len + 1), TX3912_VIDEO_CTRL4);
+
+ /* Set the pixel depth */
+ switch (tx3912fb_var.bits_per_pixel) {
+ case 1:
+ /* Monochrome */
+ outl(inl(TX3912_VIDEO_CTRL1) &
+ ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+ tx3912fb_fix.visual = FB_VISUAL_MONO10;
+ break;
+ case 4:
+ /* 4-bit gray */
+ outl(inl(TX3912_VIDEO_CTRL1) &
+ ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+ outl(inl(TX3912_VIDEO_CTRL1) |
+ TX3912_VIDEO_CTRL1_BITSEL_4BIT_GRAY,
+ TX3912_VIDEO_CTRL1);
+ tx3912fb_fix.visual = FB_VISUAL_TRUECOLOR;
+ tx3912fb_fix.grayscale = 1;
+ break;
+ case 8:
+ /* 8-bit color */
+ outl(inl(TX3912_VIDEO_CTRL1) &
+ ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+ outl(inl(TX3912_VIDEO_CTRL1) |
+ TX3912_VIDEO_CTRL1_BITSEL_8BIT_COLOR,
+ TX3912_VIDEO_CTRL1);
+ tx3912fb_fix.visual = FB_VISUAL_TRUECOLOR;
+ break;
+ case 2:
+ default:
+ /* 2-bit gray */
+ outl(inl(TX3912_VIDEO_CTRL1) &
+ ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1);
+ outl(inl(TX3912_VIDEO_CTRL1) |
+ TX3912_VIDEO_CTRL1_BITSEL_2BIT_GRAY,
+ TX3912_VIDEO_CTRL1);
+ tx3912fb_fix.visual = FB_VISUAL_PSEUDOCOLOR;
+ tx3912fb_fix.grayscale = 1;
+ break;
+ }
+
+ /* Enable the video clock */
+ outl(inl(TX3912_CLK_CTRL) | TX3912_CLK_CTRL_ENVIDCLK,
+ TX3912_CLK_CTRL);
+
+ /* Unfreeze video logic and enable DF toggle */
+ outl(inl(TX3912_VIDEO_CTRL1) &
+ ~(TX3912_VIDEO_CTRL1_ENFREEZEFRAME | TX3912_VIDEO_CTRL1_DFMODE),
+ TX3912_VIDEO_CTRL1);
+ udelay(200);
+
+ /* Clear the framebuffer */
+ memset((void *) tx3912fb_fix.smem_start, 0xff, tx3912fb_fix.smem_len);
+ udelay(200);
+
+ /* Enable the video logic */
+ outl(inl(TX3912_VIDEO_CTRL1) |
+ (TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON),
+ TX3912_VIDEO_CTRL1);
+
+ /*
+ * Memory limit
+ */
+ tx3912fb_fix.line_length =
+ get_line_length(tx3912fb_var.xres_virtual, tx3912fb_var.bits_per_pixel);
+ if ((tx3912fb_fix.line_length * tx3912fb_var.yres_virtual) > tx3912fb_fix.smem_len)
+ return -ENOMEM;
+
+ fb_info.fbops = &tx3912fb_ops;
+ fb_info.var = tx3912fb_var;
+ fb_info.fix = tx3912fb_fix;
+ fb_info.pseudo_palette = pseudo_palette;
+ fb_info.flags = FBINFO_DEFAULT;
+
+ /* Clear the framebuffer */
+ memset((void *) fb_info.fix.smem_start, 0xff, fb_info.fix.smem_len);
+ udelay(200);
+
+ fb_alloc_cmap(&info->cmap, size, 0);
+
+ if (register_framebuffer(&fb_info) < 0)
+ return -1;
+
+ printk(KERN_INFO "fb%d: TX3912 frame buffer using %uKB.\n",
+ fb_info.node, (u_int) (fb_info.fix.smem_len >> 10));
+ return 0;
+}
+
+int __init tx3912fb_setup(char *options)
+{
+ char *this_opt;
+
+ if (!options || !*options)
+ return 0;
+
+ while ((this_opt = strsep(&options, ","))) {
+ if (!strncmp(options, "bpp:", 4))
+ tx3912fb_var.bits_per_pixel = simple_strtoul(options+4, NULL, 0);
+ }
+ return 0;
+}
+
+module_init(tx3912fb_init);
+MODULE_LICENSE("GPL");
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