[ARM] pxa/littleton: add support for SPI-based TDO24M LCD panel driver (24ff4cdd) · Commits · e / devices / android_kernel_oneplus_sm8150

arch/arm/mach-pxa/include/mach/littleton.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -3,4 +3,6 @@

		#define LITTLETON_ETH_PHYS 0x30000000

		#define LITTLETON_GPIO_LCD_CS (17)

		#endif /* __ASM_ARCH_ZYLONITE_H */

arch/arm/mach-pxa/littleton.c

+49 −156

Original line number	Diff line number	Diff line
		@@ -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>
		@@ -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>
		@@ -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,
		@@ -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 */
		@@ -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)
		@@ -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) */
		@@ -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();