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[ARM] pxa/littleton: add support for SPI-based TDO24M LCD panel driver
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Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Eric Miao authored and Russell King committed Sep 23, 2008
1 parent 68677ab commit 24ff4cd
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Showing 2 changed files with 51 additions and 156 deletions.
2 changes: 2 additions & 0 deletions arch/arm/mach-pxa/include/mach/littleton.h
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Original file line number Diff line number Diff line change
Expand Up @@ -3,4 +3,6 @@

#define LITTLETON_ETH_PHYS 0x30000000

#define LITTLETON_GPIO_LCD_CS (17)

#endif /* __ASM_ARCH_ZYLONITE_H */
205 changes: 49 additions & 156 deletions arch/arm/mach-pxa/littleton.c
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/spi/spi.h>
#include <linux/smc91x.h>

#include <asm/types.h>
Expand All @@ -38,6 +39,7 @@
#include <mach/gpio.h>
#include <mach/pxafb.h>
#include <mach/ssp.h>
#include <mach/pxa2xx_spi.h>
#include <mach/pxa27x_keypad.h>
#include <mach/pxa3xx_nand.h>
#include <mach/littleton.h>
Expand Down Expand Up @@ -72,8 +74,8 @@ static mfp_cfg_t littleton_mfp_cfg[] __initdata = {

/* SSP2 */
GPIO25_SSP2_SCLK,
GPIO17_SSP2_FRM,
GPIO27_SSP2_TXD,
GPIO17_GPIO, /* SFRM as chip-select */

/* Debug Ethernet */
GPIO90_GPIO,
Expand Down Expand Up @@ -123,160 +125,6 @@ static struct platform_device smc91x_device = {
};

#if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
/* use bit 30, 31 as the indicator of command parameter number */
#define CMD0(x) ((0x00000000) | ((x) << 9))
#define CMD1(x, x1) ((0x40000000) | ((x) << 9) | 0x100 | (x1))
#define CMD2(x, x1, x2) ((0x80000000) | ((x) << 18) | 0x20000 |\
((x1) << 9) | 0x100 | (x2))

static uint32_t lcd_panel_reset[] = {
CMD0(0x1), /* reset */
CMD0(0x0), /* nop */
CMD0(0x0), /* nop */
CMD0(0x0), /* nop */
};

static uint32_t lcd_panel_on[] = {
CMD0(0x29), /* Display ON */
CMD2(0xB8, 0xFF, 0xF9), /* Output Control */
CMD0(0x11), /* Sleep out */
CMD1(0xB0, 0x16), /* Wake */
};

static uint32_t lcd_panel_off[] = {
CMD0(0x28), /* Display OFF */
CMD2(0xB8, 0x80, 0x02), /* Output Control */
CMD0(0x10), /* Sleep in */
CMD1(0xB0, 0x00), /* Deep stand by in */
};

static uint32_t lcd_vga_pass_through[] = {
CMD1(0xB0, 0x16),
CMD1(0xBC, 0x80),
CMD1(0xE1, 0x00),
CMD1(0x36, 0x50),
CMD1(0x3B, 0x00),
};

static uint32_t lcd_qvga_pass_through[] = {
CMD1(0xB0, 0x16),
CMD1(0xBC, 0x81),
CMD1(0xE1, 0x00),
CMD1(0x36, 0x50),
CMD1(0x3B, 0x22),
};

static uint32_t lcd_vga_transfer[] = {
CMD1(0xcf, 0x02), /* Blanking period control (1) */
CMD2(0xd0, 0x08, 0x04), /* Blanking period control (2) */
CMD1(0xd1, 0x01), /* CKV timing control on/off */
CMD2(0xd2, 0x14, 0x00), /* CKV 1,2 timing control */
CMD2(0xd3, 0x1a, 0x0f), /* OEV timing control */
CMD2(0xd4, 0x1f, 0xaf), /* ASW timing control (1) */
CMD1(0xd5, 0x14), /* ASW timing control (2) */
CMD0(0x21), /* Invert for normally black display */
CMD0(0x29), /* Display on */
};

static uint32_t lcd_qvga_transfer[] = {
CMD1(0xd6, 0x02), /* Blanking period control (1) */
CMD2(0xd7, 0x08, 0x04), /* Blanking period control (2) */
CMD1(0xd8, 0x01), /* CKV timing control on/off */
CMD2(0xd9, 0x00, 0x08), /* CKV 1,2 timing control */
CMD2(0xde, 0x05, 0x0a), /* OEV timing control */
CMD2(0xdf, 0x0a, 0x19), /* ASW timing control (1) */
CMD1(0xe0, 0x0a), /* ASW timing control (2) */
CMD0(0x21), /* Invert for normally black display */
CMD0(0x29), /* Display on */
};

static uint32_t lcd_panel_config[] = {
CMD2(0xb8, 0xff, 0xf9), /* Output control */
CMD0(0x11), /* sleep out */
CMD1(0xba, 0x01), /* Display mode (1) */
CMD1(0xbb, 0x00), /* Display mode (2) */
CMD1(0x3a, 0x60), /* Display mode 18-bit RGB */
CMD1(0xbf, 0x10), /* Drive system change control */
CMD1(0xb1, 0x56), /* Booster operation setup */
CMD1(0xb2, 0x33), /* Booster mode setup */
CMD1(0xb3, 0x11), /* Booster frequency setup */
CMD1(0xb4, 0x02), /* Op amp/system clock */
CMD1(0xb5, 0x35), /* VCS voltage */
CMD1(0xb6, 0x40), /* VCOM voltage */
CMD1(0xb7, 0x03), /* External display signal */
CMD1(0xbd, 0x00), /* ASW slew rate */
CMD1(0xbe, 0x00), /* Dummy data for QuadData operation */
CMD1(0xc0, 0x11), /* Sleep out FR count (A) */
CMD1(0xc1, 0x11), /* Sleep out FR count (B) */
CMD1(0xc2, 0x11), /* Sleep out FR count (C) */
CMD2(0xc3, 0x20, 0x40), /* Sleep out FR count (D) */
CMD2(0xc4, 0x60, 0xc0), /* Sleep out FR count (E) */
CMD2(0xc5, 0x10, 0x20), /* Sleep out FR count (F) */
CMD1(0xc6, 0xc0), /* Sleep out FR count (G) */
CMD2(0xc7, 0x33, 0x43), /* Gamma 1 fine tuning (1) */
CMD1(0xc8, 0x44), /* Gamma 1 fine tuning (2) */
CMD1(0xc9, 0x33), /* Gamma 1 inclination adjustment */
CMD1(0xca, 0x00), /* Gamma 1 blue offset adjustment */
CMD2(0xec, 0x01, 0xf0), /* Horizontal clock cycles */
};

static void ssp_reconfig(struct ssp_dev *dev, int nparam)
{
static int last_nparam = -1;

/* check if it is necessary to re-config SSP */
if (nparam == last_nparam)
return;

ssp_disable(dev);
ssp_config(dev, (nparam == 2) ? 0x0010058a : 0x00100581, 0x18, 0, 0);

last_nparam = nparam;
}

static void ssp_send_cmd(uint32_t *cmd, int num)
{
static int ssp_initialized;
static struct ssp_dev ssp2;

int i;

if (!ssp_initialized) {
ssp_init(&ssp2, 2, SSP_NO_IRQ);
ssp_initialized = 1;
}

clk_enable(ssp2.ssp->clk);
for (i = 0; i < num; i++, cmd++) {
ssp_reconfig(&ssp2, (*cmd >> 30) & 0x3);
ssp_write_word(&ssp2, *cmd & 0x3fffffff);

/* FIXME: ssp_flush() is mandatory here to work */
ssp_flush(&ssp2);
}
clk_disable(ssp2.ssp->clk);
}

static void littleton_lcd_power(int on, struct fb_var_screeninfo *var)
{
if (on) {
ssp_send_cmd(ARRAY_AND_SIZE(lcd_panel_on));
ssp_send_cmd(ARRAY_AND_SIZE(lcd_panel_reset));
if (var->xres > 240) {
/* VGA */
ssp_send_cmd(ARRAY_AND_SIZE(lcd_vga_pass_through));
ssp_send_cmd(ARRAY_AND_SIZE(lcd_panel_config));
ssp_send_cmd(ARRAY_AND_SIZE(lcd_vga_transfer));
} else {
/* QVGA */
ssp_send_cmd(ARRAY_AND_SIZE(lcd_qvga_pass_through));
ssp_send_cmd(ARRAY_AND_SIZE(lcd_panel_config));
ssp_send_cmd(ARRAY_AND_SIZE(lcd_qvga_transfer));
}
} else
ssp_send_cmd(ARRAY_AND_SIZE(lcd_panel_off));
}

static struct pxafb_mode_info tpo_tdo24mtea1_modes[] = {
[0] = {
/* VGA */
Expand Down Expand Up @@ -312,7 +160,6 @@ static struct pxafb_mach_info littleton_lcd_info = {
.modes = tpo_tdo24mtea1_modes,
.num_modes = 2,
.lcd_conn = LCD_COLOR_TFT_16BPP,
.pxafb_lcd_power = littleton_lcd_power,
};

static void littleton_init_lcd(void)
Expand All @@ -323,6 +170,51 @@ static void littleton_init_lcd(void)
static inline void littleton_init_lcd(void) {};
#endif /* CONFIG_FB_PXA || CONFIG_FB_PXA_MODULE */

#if defined(CONFIG_SPI_PXA2XX) || defined(CONFIG_SPI_PXA2XX_MODULE)
static struct pxa2xx_spi_master littleton_spi_info = {
.num_chipselect = 1,
};

static void littleton_tdo24m_cs(u32 cmd)
{
gpio_set_value(LITTLETON_GPIO_LCD_CS, !(cmd == PXA2XX_CS_ASSERT));
}

static struct pxa2xx_spi_chip littleton_tdo24m_chip = {
.rx_threshold = 1,
.tx_threshold = 1,
.cs_control = littleton_tdo24m_cs,
};

static struct spi_board_info littleton_spi_devices[] __initdata = {
{
.modalias = "tdo24m",
.max_speed_hz = 1000000,
.bus_num = 2,
.chip_select = 0,
.controller_data= &littleton_tdo24m_chip,
},
};

static void __init littleton_init_spi(void)
{
int err;

err = gpio_request(LITTLETON_GPIO_LCD_CS, "LCD_CS");
if (err) {
pr_warning("failed to request GPIO for LCS CS\n");
return;
}

gpio_direction_output(LITTLETON_GPIO_LCD_CS, 1);

pxa2xx_set_spi_info(2, &littleton_spi_info);
spi_register_board_info(ARRAY_AND_SIZE(littleton_spi_devices));
}
#else
static inline void littleton_init_spi(void) {}
#endif

#if defined(CONFIG_KEYBOARD_PXA27x) || defined(CONFIG_KEYBOARD_PXA27x_MODULE)
static unsigned int littleton_matrix_key_map[] = {
/* KEY(row, col, key_code) */
Expand Down Expand Up @@ -433,6 +325,7 @@ static void __init littleton_init(void)
*/
platform_device_register(&smc91x_device);

littleton_init_spi();
littleton_init_lcd();
littleton_init_keypad();
littleton_init_nand();
Expand Down

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