Commit 559ead48 authored by Russell King's avatar Russell King

[ARM] Add CLCD support for Versatile platform.

This adds the CLCD support code to support the variety of LCD panels
and VGA output supported on ARMs Versatile platform.
parent bfe694f8
...@@ -21,6 +21,7 @@ ...@@ -21,6 +21,7 @@
#include <linux/config.h> #include <linux/config.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/device.h> #include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/sysdev.h> #include <linux/sysdev.h>
#include <linux/interrupt.h> #include <linux/interrupt.h>
...@@ -31,6 +32,7 @@ ...@@ -31,6 +32,7 @@
#include <asm/leds.h> #include <asm/leds.h>
#include <asm/mach-types.h> #include <asm/mach-types.h>
#include <asm/hardware/amba.h> #include <asm/hardware/amba.h>
#include <asm/hardware/amba_clcd.h>
#include <asm/mach/arch.h> #include <asm/mach/arch.h>
#include <asm/mach/flash.h> #include <asm/mach/flash.h>
...@@ -325,6 +327,213 @@ static struct mmc_platform_data mmc1_plat_data = { ...@@ -325,6 +327,213 @@ static struct mmc_platform_data mmc1_plat_data = {
}; };
#endif #endif
/*
* CLCD support.
*/
#define SYS_CLCD_MODE_MASK (3 << 0)
#define SYS_CLCD_MODE_5551 (0 << 0)
#define SYS_CLCD_MODE_565 (1 << 0)
#define SYS_CLCD_MODE_888 (2 << 0)
#define SYS_CLCD_MODE_LT (3 << 0)
#define SYS_CLCD_NLCDIOON (1 << 2)
#define SYS_CLCD_VDDPOSSWITCH (1 << 3)
#define SYS_CLCD_PWR3V5SWITCH (1 << 4)
#define SYS_CLCD_ID_MASK (0x1f << 8)
#define SYS_CLCD_ID_SANYO_3_8 (0x00 << 8)
#define SYS_CLCD_ID_UNKNOWN_8_4 (0x01 << 8)
#define SYS_CLCD_ID_EPSON_2_2 (0x02 << 8)
#define SYS_CLCD_ID_VGA (0x1f << 8)
static struct clcd_panel vga = {
.mode = {
.name = "VGA",
.refresh = 60,
.xres = 640,
.yres = 480,
.pixclock = 39721,
.left_margin = 40,
.right_margin = 24,
.upper_margin = 32,
.lower_margin = 11,
.hsync_len = 96,
.vsync_len = 2,
.sync = 0,
.vmode = FB_VMODE_NONINTERLACED,
},
.width = -1,
.height = -1,
.tim2 = TIM2_BCD | TIM2_IPC,
.cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
.bpp = 16,
};
static struct clcd_panel sanyo_3_8_in = {
.mode = {
.name = "Sanyo QVGA",
.refresh = 116,
.xres = 320,
.yres = 240,
.pixclock = 100000,
.left_margin = 6,
.right_margin = 6,
.upper_margin = 5,
.lower_margin = 5,
.hsync_len = 6,
.vsync_len = 6,
.sync = 0,
.vmode = FB_VMODE_NONINTERLACED,
},
.width = -1,
.height = -1,
.tim2 = TIM2_BCD,
.cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
.bpp = 16,
};
static struct clcd_panel epson_2_2_in = {
.mode = {
.name = "Epson QCIF",
.refresh = 390,
.xres = 176,
.yres = 220,
.pixclock = 62500,
.left_margin = 3,
.right_margin = 2,
.upper_margin = 1,
.lower_margin = 0,
.hsync_len = 3,
.vsync_len = 2,
.sync = 0,
.vmode = FB_VMODE_NONINTERLACED,
},
.width = -1,
.height = -1,
.tim2 = TIM2_BCD | TIM2_IPC,
.cntl = CNTL_LCDTFT | CNTL_LCDVCOMP(1),
.bpp = 16,
};
/*
* Detect which LCD panel is connected, and return the appropriate
* clcd_panel structure. Note: we do not have any information on
* the required timings for the 8.4in panel, so we presently assume
* VGA timings.
*/
static struct clcd_panel *versatile_clcd_panel(void)
{
unsigned long sys_clcd = IO_ADDRESS(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
struct clcd_panel *panel = &vga;
u32 val;
val = readl(sys_clcd) & SYS_CLCD_ID_MASK;
if (val == SYS_CLCD_ID_SANYO_3_8)
panel = &sanyo_3_8_in;
else if (val == SYS_CLCD_ID_EPSON_2_2)
panel = &epson_2_2_in;
else if (val == SYS_CLCD_ID_VGA)
panel = &vga;
else {
printk(KERN_ERR "CLCD: unknown LCD panel ID 0x%08x, using VGA\n",
val);
}
return &vga;
}
/*
* Disable all display connectors on the interface module.
*/
static void versatile_clcd_disable(struct clcd_fb *fb)
{
unsigned long sys_clcd = IO_ADDRESS(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
u32 val;
val = readl(sys_clcd);
val &= ~SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
writel(val, sys_clcd);
}
/*
* Enable the relevant connector on the interface module.
*/
static void versatile_clcd_enable(struct clcd_fb *fb)
{
unsigned long sys_clcd = IO_ADDRESS(VERSATILE_SYS_BASE) + VERSATILE_SYS_CLCD_OFFSET;
u32 val;
val = readl(sys_clcd);
val &= ~SYS_CLCD_MODE_MASK;
switch (fb->fb.var.green.length) {
case 5:
#if 0
/*
* For some undocumented reason, we need to select 565 mode
* even when using 555 with VGA. Maybe this is only true
* for the VGA output and needs to be done for LCD panels?
* I can't get an explaination from the people who should
* know.
*/
val |= SYS_CLCD_MODE_5551;
break;
#endif
case 6:
val |= SYS_CLCD_MODE_565;
break;
case 8:
val |= SYS_CLCD_MODE_888;
break;
}
/*
* Set the MUX
*/
writel(val, sys_clcd);
/*
* And now enable the PSUs
*/
val |= SYS_CLCD_NLCDIOON | SYS_CLCD_PWR3V5SWITCH;
writel(val, sys_clcd);
}
static unsigned long framesize = SZ_1M;
static int versatile_clcd_setup(struct clcd_fb *fb)
{
dma_addr_t dma;
fb->panel = versatile_clcd_panel();
fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev, framesize,
&dma, GFP_KERNEL);
if (!fb->fb.screen_base) {
printk(KERN_ERR "CLCD: unable to map framebuffer\n");
return -ENOMEM;
}
fb->fb.fix.smem_start = dma;
fb->fb.fix.smem_len = framesize;
return 0;
}
static void versatile_clcd_remove(struct clcd_fb *fb)
{
dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
fb->fb.screen_base, fb->fb.fix.smem_start);
}
static struct clcd_board clcd_plat_data = {
.name = "Versatile PB",
.check = clcdfb_check,
.decode = clcdfb_decode,
.disable = versatile_clcd_disable,
.enable = versatile_clcd_enable,
.setup = versatile_clcd_setup,
.remove = versatile_clcd_remove,
};
#define AMBA_DEVICE(name,busid,base,plat) \ #define AMBA_DEVICE(name,busid,base,plat) \
static struct amba_device name##_device = { \ static struct amba_device name##_device = { \
.dev = { \ .dev = { \
...@@ -417,7 +626,7 @@ AMBA_DEVICE(mmc1, "fpga:0b", MMCI1, &mmc1_plat_data); ...@@ -417,7 +626,7 @@ AMBA_DEVICE(mmc1, "fpga:0b", MMCI1, &mmc1_plat_data);
/* DevChip Primecells */ /* DevChip Primecells */
AMBA_DEVICE(smc, "dev:00", SMC, NULL); AMBA_DEVICE(smc, "dev:00", SMC, NULL);
AMBA_DEVICE(mpmc, "dev:10", MPMC, NULL); AMBA_DEVICE(mpmc, "dev:10", MPMC, NULL);
AMBA_DEVICE(clcd, "dev:20", CLCD, NULL); AMBA_DEVICE(clcd, "dev:20", CLCD, &clcd_plat_data);
AMBA_DEVICE(dmac, "dev:30", DMAC, NULL); AMBA_DEVICE(dmac, "dev:30", DMAC, NULL);
AMBA_DEVICE(sctl, "dev:e0", SCTL, NULL); AMBA_DEVICE(sctl, "dev:e0", SCTL, NULL);
AMBA_DEVICE(wdog, "dev:e1", WATCHDOG, NULL); AMBA_DEVICE(wdog, "dev:e1", WATCHDOG, NULL);
......
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