new file mode 100644
@@ -0,0 +1,43 @@
+Ilitek ILI9341 TFT panel driver with SPI control bus
+
+This is a driver for 320x240 TFT panels, accepting a rgb input
+streams that get adapted and scaled to the panel.
+VCOMH outputs.
+
+Required properties:
+ - compatible: "stm32f429-disco,ltdc-panel", "ilitek,ili9341"
+ (full system-specific compatible is always required to look up configuration)
+ - reg: address of the panel on the SPI bus
+
+Optional properties:
+ - reset-gpios: a GPIO spec for the reset pin, see gpio/gpio.txt
+ - dc-gpios: a GPIO spec for the dc pin, see gpio/gpio.txt
+
+ The following optional properties only apply to RGB input mode:
+
+ - pixelclk-active: see display/panel/display-timing.txt
+ - de-active: see display/panel/display-timing.txt
+ - hsync-active: see display/panel/display-timing.txt
+ - vsync-active: see display/panel/display-timing.txt
+
+The panel must obey the rules for a SPI slave device as specified in
+spi/spi-bus.txt
+
+The device node can contain one 'port' child node with one child
+'endpoint' node, according to the bindings defined in
+media/video-interfaces.txt. This node should describe panel's video bus.
+
+Example:
+
+panel: display@0 {
+ compatible = "stm32f429-disco,ltdc-panel", "ilitek,ili9341";
+ reg = <0>;
+ spi-3wire;
+ spi-max-frequency = <10000000>;
+ dc-gpios = <&gpiod 13 0>;
+ port {
+ panel_in: endpoint {
+ remote-endpoint = <&display_out>;
+ };
+ };
+};
@@ -316,6 +316,85 @@
};
};
+ ltdc_pins_f429_disco: ltdc-1 {
+ pins {
+ pinmux = <STM32_PINMUX('C', 6, AF14)>,
+ /* LCD_HSYNC */
+ <STM32_PINMUX('A', 4, AF14)>,
+ /* LCD_VSYNC */
+ <STM32_PINMUX('G', 7, AF14)>,
+ /* LCD_CLK */
+ <STM32_PINMUX('C', 10, AF14)>,
+ /* LCD_R2 */
+ <STM32_PINMUX('B', 0, AF9)>,
+ /* LCD_R3 */
+ <STM32_PINMUX('A', 11, AF14)>,
+ /* LCD_R4 */
+ <STM32_PINMUX('A', 12, AF14)>,
+ /* LCD_R5 */
+ <STM32_PINMUX('B', 1, AF9)>,
+ /* LCD_R6*/
+ <STM32_PINMUX('G', 6, AF14)>,
+ /* LCD_R7 */
+ <STM32_PINMUX('A', 6, AF14)>,
+ /* LCD_G2 */
+ <STM32_PINMUX('G', 10, AF9)>,
+ /* LCD_G3 */
+ <STM32_PINMUX('B', 10, AF14)>,
+ /* LCD_G4 */
+ <STM32_PINMUX('D', 6, AF14)>,
+ /* LCD_B2 */
+ <STM32_PINMUX('G', 11, AF14)>,
+ /* LCD_B3*/
+ <STM32_PINMUX('B', 11, AF14)>,
+ /* LCD_G5 */
+ <STM32_PINMUX('C', 7, AF14)>,
+ /* LCD_G6 */
+ <STM32_PINMUX('D', 3, AF14)>,
+ /* LCD_G7 */
+ <STM32_PINMUX('G', 12, AF9)>,
+ /* LCD_B4 */
+ <STM32_PINMUX('A', 3, AF14)>,
+ /* LCD_B5 */
+ <STM32_PINMUX('B', 8, AF14)>,
+ /* LCD_B6 */
+ <STM32_PINMUX('B', 9, AF14)>,
+ /* LCD_B7 */
+ <STM32_PINMUX('F', 10, AF14)>;
+ /* LCD_DE */
+ slew-rate = <2>;
+ };
+ };
+
+ i2c3_pins: i2c3-0 {
+ pins {
+ pinmux = <STM32_PINMUX('C', 9, AF4)>,
+ /* I2C3_SDA */
+ <STM32_PINMUX('A', 8, AF4)>;
+ /* I2C3_SCL */
+ bias-disable;
+ drive-open-drain;
+ slew-rate = <3>;
+ };
+ };
+
+ spi5_pins: spi5-0 {
+ pins1 {
+ pinmux = <STM32_PINMUX('F', 7, AF5)>,
+ /* SPI5_CLK */
+ <STM32_PINMUX('F', 9, AF5)>;
+ /* SPI5_MOSI */
+ bias-disable;
+ drive-push-pull;
+ slew-rate = <0>;
+ };
+ pins2 {
+ pinmux = <STM32_PINMUX('F', 8, AF5)>;
+ /* SPI5_MISO */
+ bias-disable;
+ };
+ };
+
dcmi_pins: dcmi-0 {
pins {
pinmux = <STM32_PINMUX('A', 4, AF13)>, /* DCMI_HSYNC */
@@ -49,6 +49,8 @@
#include "stm32f429.dtsi"
#include "stm32f429-pinctrl.dtsi"
#include <dt-bindings/input/input.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/gpio/gpio.h>
/ {
model = "STMicroelectronics STM32F429i-DISCO board";
@@ -98,6 +100,14 @@
regulator-name = "vcc5_host1";
regulator-always-on;
};
+
+ reg_3p3v: regulator-3p3v {
+ compatible = "regulator-fixed";
+ regulator-name = "3P3V";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-always-on;
+ };
};
&clk_hse {
@@ -127,3 +137,81 @@
pinctrl-names = "default";
status = "okay";
};
+
+<dc {
+ status = "okay";
+ pinctrl-0 = <<dc_pins_f429_disco>;
+ pinctrl-names = "default";
+
+ port {
+ ltdc_out_rgb: endpoint {
+ remote-endpoint = <&panel_in_rgb>;
+ };
+ };
+};
+
+&spi5 {
+ status = "okay";
+ pinctrl-0 = <&spi5_pins>;
+ pinctrl-names = "default";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ cs-gpios = <&gpioc 1 GPIO_ACTIVE_LOW>,<&gpioc 2 GPIO_ACTIVE_LOW>;
+ dmas = <&dma2 3 2 0x400 0x0>,
+ <&dma2 4 2 0x400 0x0>;
+ dma-names = "rx", "tx";
+ l3gd20: l3gd20@0 {
+ compatible = "st,l3gd20-gyro";
+ spi-max-frequency = <10000000>;
+ st,drdy-int-pin = <2>;
+ interrupt-parent = <&gpioa>;
+ interrupts = <1 IRQ_TYPE_EDGE_RISING>,
+ <2 IRQ_TYPE_EDGE_RISING>;
+ reg = <0>;
+ vddio = <®_3p3v>;
+ vdd = <®_3p3v>;
+ status = "okay";
+ };
+ display: display@1{
+ /* Connect panel-ilitek-9341 to ltdc */
+ compatible = "stm32f429-disco,ltdc-panel", "ilitek,ili9341";
+ reg = <1>;
+ spi-3wire;
+ spi-max-frequency = <10000000>;
+ dc-gpios = <&gpiod 13 0>;
+ port {
+ panel_in_rgb: endpoint {
+ remote-endpoint = <<dc_out_rgb>;
+ };
+ };
+ };
+};
+
+&i2c3 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c3_pins>;
+ status = "okay";
+
+ touch: stmpe811@41 {
+ compatible = "st,stmpe811";
+ reg = <0x41>;
+ interrupts = <15 IRQ_TYPE_EDGE_FALLING>;
+ interrupt-parent = <&gpioa>;
+ vio = <®_3p3v>;
+ vcc = <®_3p3v>;
+ status = "okay";
+
+ stmpe_touchscreen {
+ compatible = "st,stmpe-ts";
+ st,sample-time = <4>;
+ st,mod-12b = <1>;
+ st,ref-sel = <0>;
+ st,adc-freq = <1>;
+ st,ave-ctrl = <1>;
+ st,touch-det-delay = <2>;
+ st,settling = <2>;
+ st,fraction-z = <7>;
+ st,i-drive = <1>;
+ };
+ };
+};
@@ -402,6 +402,18 @@
status = "disabled";
};
+ i2c3: i2c@40005c00 {
+ compatible = "st,stm32f4-i2c";
+ reg = <0x40005c00 0x400>;
+ interrupts = <72>,
+ <73>;
+ resets = <&rcc STM32F4_APB1_RESET(I2C3)>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(I2C3)>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ status = "disabled";
+ };
+
dac: dac@40007400 {
compatible = "st,stm32f4-dac-core";
reg = <0x40007400 0x400>;
@@ -129,7 +129,8 @@ static const struct stm32f4_gate_data stm32f429_gates[] __initconst = {
{ STM32F4_RCC_APB2ENR, 20, "spi5", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 21, "spi6", "apb2_div" },
{ STM32F4_RCC_APB2ENR, 22, "sai1", "apb2_div" },
- { STM32F4_RCC_APB2ENR, 26, "ltdc", "apb2_div" },
+ { STM32F4_RCC_APB2ENR, 26, "ltdc", "apb2_div",
+ CLK_IGNORE_UNUSED },
};
static const struct stm32f4_gate_data stm32f469_gates[] __initconst = {
@@ -1754,10 +1755,10 @@ static void __init stm32f4_rcc_init(struct device_node *np)
stm32f4_rcc_register_pll("vco_in", &data->pll_data[0],
&stm32f4_clk_lock);
- clks[PLL_VCO_I2S] = stm32f4_rcc_register_pll("vco_in",
+ clks[PLL_I2S] = stm32f4_rcc_register_pll("vco_in",
&data->pll_data[1], &stm32f4_clk_lock);
- clks[PLL_VCO_SAI] = stm32f4_rcc_register_pll("vco_in",
+ clks[PLL_SAI] = stm32f4_rcc_register_pll("vco_in",
&data->pll_data[2], &stm32f4_clk_lock);
for (n = 0; n < MAX_POST_DIV; n++) {
@@ -95,6 +95,14 @@ config DRM_PANEL_ILITEK_IL9322
Say Y here if you want to enable support for Ilitek IL9322
QVGA (320x240) RGB, YUV and ITU-T BT.656 panels.
+config DRM_PANEL_ILITEK_IL9341
+ tristate "Ilitek ILI9341 240x320 QVGA panels"
+ depends on OF && SPI
+ select REGMAP
+ help
+ Say Y here if you want to enable support for Ilitek IL9341
+ QVGA (240x320) RGB panels.
+
config DRM_PANEL_ILITEK_ILI9881C
tristate "Ilitek ILI9881C-based panels"
depends on OF
@@ -8,6 +8,7 @@ obj-$(CONFIG_DRM_PANEL_ELIDA_KD35T133) += panel-elida-kd35t133.o
obj-$(CONFIG_DRM_PANEL_FEIXIN_K101_IM2BA02) += panel-feixin-k101-im2ba02.o
obj-$(CONFIG_DRM_PANEL_FEIYANG_FY07024DI26A30D) += panel-feiyang-fy07024di26a30d.o
obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) += panel-ilitek-ili9322.o
+obj-$(CONFIG_DRM_PANEL_ILITEK_IL9341) += panel-ilitek-ili9341.o
obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9881C) += panel-ilitek-ili9881c.o
obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o
obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
new file mode 100644
@@ -0,0 +1,561 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Ilitek ILI9341 TFT LCD drm_panel driver.
+ *
+ * This panel can be configured to support:
+ * - 16-bit parallel RGB interface
+ *
+ * Copyright (C) 2020 Dillon Min <dillon.minfei@gmail.com>
+ * Derived from drivers/drm/gpu/panel/panel-ilitek-ili9322.c
+ */
+
+#include <linux/bitops.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+
+#include <video/mipi_display.h>
+#include <video/of_videomode.h>
+#include <video/videomode.h>
+
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
+
+#define DEFAULT_SPI_SPEED 10000000
+
+#define ILI9341_SLEEP_OUT 0x11 /* Sleep out register */
+#define ILI9341_GAMMA 0x26 /* Gamma register */
+#define ILI9341_DISPLAY_OFF 0x28 /* Display off register */
+#define ILI9341_DISPLAY_ON 0x29 /* Display on register */
+#define ILI9341_COLUMN_ADDR 0x2A /* Colomn address register */
+#define ILI9341_PAGE_ADDR 0x2B /* Page address register */
+#define ILI9341_GRAM 0x2C /* GRAM register */
+#define ILI9341_MAC 0x36 /* Memory Access Control register*/
+#define ILI9341_PIXEL_FORMAT 0x3A /* Pixel Format register */
+#define ILI9341_WDB 0x51 /* Write Brightness Display
+ * register
+ */
+#define ILI9341_WCD 0x53 /* Write Control Display
+ * register
+ */
+#define ILI9341_RGB_INTERFACE 0xB0 /* RGB Interface Signal Control */
+#define ILI9341_FRC 0xB1 /* Frame Rate Control register */
+#define ILI9341_BPC 0xB5 /* Blanking Porch Control
+ * register
+ */
+#define ILI9341_DFC 0xB6 /* Display Function Control
+ * register
+ */
+#define ILI9341_POWER1 0xC0 /* Power Control 1 register */
+#define ILI9341_POWER2 0xC1 /* Power Control 2 register */
+#define ILI9341_VCOM1 0xC5 /* VCOM Control 1 register */
+#define ILI9341_VCOM2 0xC7 /* VCOM Control 2 register */
+#define ILI9341_POWERA 0xCB /* Power control A register */
+#define ILI9341_POWERB 0xCF /* Power control B register */
+#define ILI9341_PGAMMA 0xE0 /* Positive Gamma Correction
+ * register
+ */
+#define ILI9341_NGAMMA 0xE1 /* Negative Gamma Correction
+ * register
+ */
+#define ILI9341_DTCA 0xE8 /* Driver timing control A */
+#define ILI9341_DTCB 0xEA /* Driver timing control B */
+#define ILI9341_POWER_SEQ 0xED /* Power on sequence register */
+#define ILI9341_3GAMMA_EN 0xF2 /* 3 Gamma enable register */
+#define ILI9341_INTERFACE 0xF6 /* Interface control register */
+#define ILI9341_PRC 0xF7 /* Pump ratio control register */
+
+static u8 ili9341_cmd0[] = {0xc3, 0x08, 0x50};
+static u8 ili9341_powerb[] = {0x00, 0xc1, 0x30};
+static u8 ili9341_power_seq[] = {0x64, 0x03, 0x12, 0x81};
+static u8 ili9341_dtca[] = {0x85, 0x00, 0x78};
+static u8 ili9341_powera[] = {0x39, 0x2c, 0x00, 0x34, 0x02};
+static u8 ili9341_prc[] = {0x20};
+static u8 ili9341_dtcb[] = {0x00, 0x00};
+static u8 ili9341_frc[] = {0x00, 0x1b};
+static u8 ili9341_dfc1[] = {0x0a, 0xa2};
+static u8 ili9341_power1[] = {0x10};
+static u8 ili9341_power2[] = {0x10};
+static u8 ili9341_vcom1[] = {0x45, 0x15};
+static u8 ili9341_vcom2[] = {0x90};
+static u8 ili9341_mac[] = {0xc8};
+static u8 ili9341_gamma_en[] = {0x00};
+static u8 ili9341_rgb_intr[] = {0xc2};
+static u8 ili9341_dfc2[] = {0x0a, 0xa7, 0x27, 0x04};
+static u8 ili9341_column_addr[] = {0x00, 0x00, 0x00, 0xef};
+static u8 ili9341_page_addr[] = {0x00, 0x00, 0x01, 0x3f};
+static u8 ili9341_intr[] = {0x01, 0x00, 0x06};
+static u8 ili9341_gamma[] = {0x01};
+static u8 ili9341_pgamma[] = {0x0f, 0x29, 0x24, 0x0c, 0x0e, 0x09, 0x4e, 0x78,
+ 0x3c, 0x09, 0x13, 0x05, 0x17, 0x11, 0x00};
+static u8 ili9341_ngamma[] = {0x00, 0x16, 0x1b, 0x04, 0x11, 0x07, 0x31, 0x33,
+ 0x42, 0x05, 0x0c, 0x0a, 0x28, 0x2f, 0x0f};
+
+/**
+ * enum ili9341_input - the format of the incoming signal to the panel
+ *
+ * The panel can be connected to various input streams and four of them can
+ * be selected by electronic straps on the display. However it is possible
+ * to select another mode or override the electronic default with this
+ * setting.
+ */
+enum ili9341_input {
+ ILI9341_INPUT_PRGB_THROUGH = 0x0,
+ ILI9341_INPUT_PRGB_ALIGNED = 0x1,
+ ILI9341_INPUT_UNKNOWN = 0xf,
+};
+
+/**
+ * struct ili9341_config - the system specific ILI9341 configuration
+ * @width_mm: physical panel width [mm]
+ * @height_mm: physical panel height [mm]
+ * @input: the input/entry type used in this system, if this is set to
+ * ILI9341_INPUT_UNKNOWN the driver will try to figure it out by probing
+ * the hardware
+ * @dclk_active_high: data/pixel clock active high, data will be clocked
+ * in on the rising edge of the DCLK (this is usually the case).
+ * @de_active_high: DE (data entry) is active high
+ * @hsync_active_high: HSYNC is active high
+ * @vsync_active_high: VSYNC is active high
+ */
+struct ili9341_config {
+ u32 width_mm;
+ u32 height_mm;
+ enum ili9341_input input;
+ bool dclk_active_high;
+ bool de_active_high;
+ bool hsync_active_high;
+ bool vsync_active_high;
+};
+
+struct ili9341 {
+ struct device *dev;
+ const struct ili9341_config *conf;
+ struct drm_panel panel;
+ struct regmap *regmap;
+ struct gpio_desc *reset_gpio;
+ struct gpio_desc *dc_gpio;
+ enum ili9341_input input;
+ struct videomode vm;
+};
+
+static inline struct ili9341 *panel_to_ili9341(struct drm_panel *panel)
+{
+ return container_of(panel, struct ili9341, panel);
+}
+
+int ili9341_spi_transfer(struct spi_device *spi, u32 speed_hz,
+ u8 bpw, const void *buf, size_t len)
+{
+ size_t max_chunk = spi_max_transfer_size(spi);
+ struct spi_transfer tr = {
+ .bits_per_word = bpw,
+ .speed_hz = speed_hz,
+ .len = len,
+ };
+ struct spi_message m;
+ size_t chunk;
+ int ret;
+
+ spi_message_init_with_transfers(&m, &tr, 1);
+
+ while (len) {
+ chunk = min(len, max_chunk);
+
+ tr.tx_buf = buf;
+ tr.len = chunk;
+ buf += chunk;
+ len -= chunk;
+
+ ret = spi_sync(spi, &m);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+static int ili9341_regmap_spi_write(void *context, const void *data,
+ size_t count)
+{
+ struct device *dev = context;
+ struct spi_device *spi = to_spi_device(dev);
+ struct ili9341 *ili = spi_get_drvdata(spi);
+ int ret = 0;
+
+ gpiod_set_value_cansleep(ili->dc_gpio, 0);
+
+ ret = ili9341_spi_transfer(spi, DEFAULT_SPI_SPEED, 8, data+0, 1);
+ if (ret || count == 1 ||
+ ((u8 *)data)[0] == ILI9341_GRAM ||
+ ((u8 *)data)[0] == ILI9341_DISPLAY_ON ||
+ ((u8 *)data)[0] == ILI9341_SLEEP_OUT ||
+ ((u8 *)data)[0] == ILI9341_DISPLAY_OFF)
+ return ret;
+
+ gpiod_set_value_cansleep(ili->dc_gpio, 1);
+
+ return ili9341_spi_transfer(spi, DEFAULT_SPI_SPEED, 8, data+1, count-1);
+}
+
+static int ili9341_regmap_spi_read(void *context, const void *reg,
+ size_t reg_size, void *val, size_t val_size)
+{
+ return 0;
+}
+
+static struct regmap_bus ili9341_regmap_bus = {
+ .write = ili9341_regmap_spi_write,
+ .read = ili9341_regmap_spi_read,
+ .reg_format_endian_default = REGMAP_ENDIAN_BIG,
+ .val_format_endian_default = REGMAP_ENDIAN_BIG,
+};
+
+static bool ili9341_volatile_reg(struct device *dev, unsigned int reg)
+{
+ return false;
+}
+
+static bool ili9341_writeable_reg(struct device *dev, unsigned int reg)
+{
+ /* Just register 0 is read-only */
+ if (reg == 0x00)
+ return false;
+ return true;
+}
+
+static const struct regmap_config ili9341_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0xff,
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_reg = ili9341_volatile_reg,
+ .writeable_reg = ili9341_writeable_reg,
+};
+
+static int ili9341_init(struct drm_panel *panel, struct ili9341 *ili)
+{
+ regmap_bulk_write(ili->regmap, 0xca,
+ ili9341_cmd0, sizeof(ili9341_cmd0));
+ regmap_bulk_write(ili->regmap, ILI9341_POWERB,
+ ili9341_powerb, sizeof(ili9341_powerb));
+ regmap_bulk_write(ili->regmap, ILI9341_POWER_SEQ,
+ ili9341_power_seq, sizeof(ili9341_power_seq));
+ regmap_bulk_write(ili->regmap, ILI9341_DTCA,
+ ili9341_dtca, sizeof(ili9341_dtca));
+ regmap_bulk_write(ili->regmap, ILI9341_POWERA,
+ ili9341_powera, sizeof(ili9341_powera));
+ regmap_write(ili->regmap, ILI9341_PRC, ili9341_prc[0]);
+ regmap_bulk_write(ili->regmap, ILI9341_DTCB,
+ ili9341_dtcb, sizeof(ili9341_dtcb));
+ regmap_bulk_write(ili->regmap, ILI9341_FRC,
+ ili9341_frc, sizeof(ili9341_frc));
+ regmap_bulk_write(ili->regmap, ILI9341_DFC,
+ ili9341_dfc1, sizeof(ili9341_dfc1));
+ regmap_write(ili->regmap, ILI9341_POWER1, ili9341_power1[0]);
+ regmap_write(ili->regmap, ILI9341_POWER2, ili9341_power2[0]);
+ regmap_bulk_write(ili->regmap, ILI9341_VCOM1,
+ ili9341_vcom1, sizeof(ili9341_vcom1));
+ regmap_write(ili->regmap, ILI9341_VCOM2, ili9341_vcom2[0]);
+ regmap_write(ili->regmap, ILI9341_MAC, ili9341_mac[0]);
+ regmap_write(ili->regmap, ILI9341_3GAMMA_EN, ili9341_gamma_en[0]);
+ regmap_write(ili->regmap, ILI9341_RGB_INTERFACE, ili9341_rgb_intr[0]);
+ regmap_bulk_write(ili->regmap, ILI9341_DFC,
+ ili9341_dfc2, sizeof(ili9341_dfc2));
+
+ /* colomn address set */
+ regmap_bulk_write(ili->regmap, ILI9341_COLUMN_ADDR,
+ ili9341_column_addr, sizeof(ili9341_column_addr));
+
+ /* Page Address Set */
+ regmap_bulk_write(ili->regmap, ILI9341_PAGE_ADDR,
+ ili9341_page_addr, sizeof(ili9341_page_addr));
+ regmap_bulk_write(ili->regmap, ILI9341_INTERFACE,
+ ili9341_intr, sizeof(ili9341_intr));
+ regmap_write(ili->regmap, ILI9341_GRAM, 0);
+ msleep(200);
+
+ regmap_write(ili->regmap, ILI9341_GAMMA, ili9341_gamma[0]);
+ regmap_bulk_write(ili->regmap, ILI9341_PGAMMA,
+ ili9341_pgamma, sizeof(ili9341_pgamma));
+ regmap_bulk_write(ili->regmap, ILI9341_NGAMMA,
+ ili9341_ngamma, sizeof(ili9341_ngamma));
+ regmap_write(ili->regmap, ILI9341_SLEEP_OUT, 0);
+ msleep(200);
+
+ regmap_write(ili->regmap, ILI9341_DISPLAY_ON, 0);
+
+ /* GRAM start writing */
+ regmap_write(ili->regmap, ILI9341_GRAM, 0);
+
+ dev_info(ili->dev, "initialized display\n");
+
+ return 0;
+}
+
+/*
+ * This power-on sequence if from the datasheet, page 57.
+ */
+static int ili9341_power_on(struct ili9341 *ili)
+{
+ /* Assert RESET */
+ gpiod_set_value(ili->reset_gpio, 1);
+
+ msleep(20);
+
+ /* De-assert RESET */
+ gpiod_set_value(ili->reset_gpio, 0);
+
+ msleep(10);
+
+ return 0;
+}
+
+static int ili9341_power_off(struct ili9341 *ili)
+{
+ return 0;
+}
+
+static int ili9341_disable(struct drm_panel *panel)
+{
+ struct ili9341 *ili = panel_to_ili9341(panel);
+ int ret;
+
+ ret = regmap_write(ili->regmap, ILI9341_DISPLAY_OFF, 0);
+ if (ret) {
+ dev_err(ili->dev, "unable to go to standby mode\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ili9341_unprepare(struct drm_panel *panel)
+{
+ struct ili9341 *ili = panel_to_ili9341(panel);
+
+ return ili9341_power_off(ili);
+}
+
+static int ili9341_prepare(struct drm_panel *panel)
+{
+ struct ili9341 *ili = panel_to_ili9341(panel);
+ int ret;
+
+ ret = ili9341_power_on(ili);
+ if (ret < 0)
+ return ret;
+
+ ret = ili9341_init(panel, ili);
+ if (ret < 0)
+ ili9341_unprepare(panel);
+
+ return ret;
+}
+
+static int ili9341_enable(struct drm_panel *panel)
+{
+ struct ili9341 *ili = panel_to_ili9341(panel);
+ int ret;
+
+ ret = regmap_write(ili->regmap, ILI9341_DISPLAY_ON, 0);
+ if (ret) {
+ dev_err(ili->dev, "unable to enable panel\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+/* This is the only mode listed for parallel RGB in the datasheet */
+static const struct drm_display_mode prgb_320x240_mode = {
+ .clock = 6100,
+ .hdisplay = 240,
+ .hsync_start = 240 + 10,
+ .hsync_end = 240 + 10 + 10,
+ .htotal = 280,
+ .vdisplay = 320,
+ .vsync_start = 320 + 4,
+ .vsync_end = 320 + 4 + 2,
+ .vtotal = 328,
+ .vrefresh = 60,
+ .flags = 0,
+};
+
+static int ili9341_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ struct ili9341 *ili = panel_to_ili9341(panel);
+ struct drm_device *drm = connector->dev;
+ struct drm_display_mode *mode;
+ struct drm_display_info *info;
+
+ info = &connector->display_info;
+ info->width_mm = ili->conf->width_mm;
+ info->height_mm = ili->conf->height_mm;
+ if (ili->conf->dclk_active_high)
+ info->bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE;
+ else
+ info->bus_flags |= DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE;
+
+ if (ili->conf->de_active_high)
+ info->bus_flags |= DRM_BUS_FLAG_DE_HIGH;
+ else
+ info->bus_flags |= DRM_BUS_FLAG_DE_LOW;
+
+ switch (ili->input) {
+ case ILI9341_INPUT_PRGB_THROUGH:
+ case ILI9341_INPUT_PRGB_ALIGNED:
+ mode = drm_mode_duplicate(drm, &prgb_320x240_mode);
+ break;
+ default:
+ mode = NULL;
+ break;
+ }
+ if (!mode) {
+ DRM_ERROR("bad mode or failed to add mode\n");
+ return -EINVAL;
+ }
+ drm_mode_set_name(mode);
+ /*
+ * This is the preferred mode because most people are going
+ * to want to use the display with VGA type graphics.
+ */
+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+
+ /* Set up the polarity */
+ if (ili->conf->hsync_active_high)
+ mode->flags |= DRM_MODE_FLAG_PHSYNC;
+ else
+ mode->flags |= DRM_MODE_FLAG_NHSYNC;
+ if (ili->conf->vsync_active_high)
+ mode->flags |= DRM_MODE_FLAG_PVSYNC;
+ else
+ mode->flags |= DRM_MODE_FLAG_NVSYNC;
+
+ mode->width_mm = ili->conf->width_mm;
+ mode->height_mm = ili->conf->height_mm;
+ drm_mode_probed_add(connector, mode);
+
+ return 1; /* Number of modes */
+}
+
+static const struct drm_panel_funcs ili9341_drm_funcs = {
+ .disable = ili9341_disable,
+ .unprepare = ili9341_unprepare,
+ .prepare = ili9341_prepare,
+ .enable = ili9341_enable,
+ .get_modes = ili9341_get_modes,
+};
+
+static int ili9341_probe(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct ili9341 *ili;
+ const struct regmap_config *regmap_config;
+ int ret;
+
+ ili = devm_kzalloc(dev, sizeof(struct ili9341), GFP_KERNEL);
+ if (!ili)
+ return -ENOMEM;
+
+ spi_set_drvdata(spi, ili);
+
+ ili->dev = dev;
+ /*
+ * Every new incarnation of this display must have a unique
+ * data entry for the system in this driver.
+ */
+ ili->conf = of_device_get_match_data(dev);
+ if (!ili->conf) {
+ dev_err(dev, "missing device configuration\n");
+ return -ENODEV;
+ }
+
+ ili->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(ili->reset_gpio)) {
+ dev_err(dev, "failed to get RESET GPIO\n");
+ return PTR_ERR(ili->reset_gpio);
+ }
+
+ ili->dc_gpio = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
+ if (IS_ERR(ili->dc_gpio)) {
+ dev_err(dev, "failed to get DC GPIO\n");
+ return PTR_ERR(ili->dc_gpio);
+ }
+
+ spi->bits_per_word = 8;
+ ret = spi_setup(spi);
+ if (ret < 0) {
+ dev_err(dev, "spi setup failed.\n");
+ return ret;
+ }
+
+ regmap_config = &ili9341_regmap_config;
+
+ ili->regmap = devm_regmap_init(dev, &ili9341_regmap_bus, dev,
+ regmap_config);
+ if (IS_ERR(ili->regmap)) {
+ dev_err(dev, "failed to allocate register map\n");
+ return PTR_ERR(ili->regmap);
+ }
+
+ ili->input = ili->conf->input;
+
+ drm_panel_init(&ili->panel, dev, &ili9341_drm_funcs,
+ DRM_MODE_CONNECTOR_DPI);
+
+ return drm_panel_add(&ili->panel);
+}
+
+static int ili9341_remove(struct spi_device *spi)
+{
+ struct ili9341 *ili = spi_get_drvdata(spi);
+
+ ili9341_power_off(ili);
+ drm_panel_remove(&ili->panel);
+
+ return 0;
+}
+
+/*
+ * The Stm32f429-disco board has a panel ili9341 connected to ltdc controller
+ */
+static const struct ili9341_config ili9341_data = {
+ .width_mm = 65,
+ .height_mm = 50,
+ .input = ILI9341_INPUT_PRGB_THROUGH,
+ .dclk_active_high = true,
+ .de_active_high = false,
+ .hsync_active_high = false,
+ .vsync_active_high = false,
+};
+
+static const struct of_device_id ili9341_of_match[] = {
+ {
+ .compatible = "stm32f429-disco,ltdc-panel",
+ .data = &ili9341_data,
+ },
+ {
+ .compatible = "ilitek,ili9341",
+ .data = NULL,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ili9341_of_match);
+
+static struct spi_driver ili9341_driver = {
+ .probe = ili9341_probe,
+ .remove = ili9341_remove,
+ .driver = {
+ .name = "panel-ilitek-ili9341",
+ .of_match_table = ili9341_of_match,
+ },
+};
+module_spi_driver(ili9341_driver);
+
+MODULE_AUTHOR("Dillon Min <dillon.minfei@gmail.com>");
+MODULE_DESCRIPTION("ILI9341 LCD panel driver");
+MODULE_LICENSE("GPL v2");
@@ -388,6 +388,10 @@ static int stm32h7_spi_get_fifo_size(struct stm32_spi *spi)
return count;
}
+static void stm32f4_spi_tx_dummy(struct stm32_spi *spi)
+{
+ writeb_relaxed(0x55, spi->base + STM32F4_SPI_DR);
+}
/**
* stm32f4_spi_get_bpw_mask - Return bits per word mask
* @spi: pointer to the spi controller data structure
@@ -811,7 +815,9 @@ static irqreturn_t stm32f4_spi_irq_event(int irq, void *dev_id)
mask |= STM32F4_SPI_SR_TXE;
}
- if (!spi->cur_usedma && spi->cur_comm == SPI_FULL_DUPLEX) {
+ if (!spi->cur_usedma && (spi->cur_comm == SPI_FULL_DUPLEX ||
+ spi->cur_comm == SPI_SIMPLEX_RX ||
+ spi->cur_comm == SPI_3WIRE_RX)) {
/* TXE flag is set and is handled when RXNE flag occurs */
sr &= ~STM32F4_SPI_SR_TXE;
mask |= STM32F4_SPI_SR_RXNE | STM32F4_SPI_SR_OVR;
@@ -850,8 +856,10 @@ static irqreturn_t stm32f4_spi_irq_event(int irq, void *dev_id)
stm32f4_spi_read_rx(spi);
if (spi->rx_len == 0)
end = true;
- else /* Load data for discontinuous mode */
+ else if (spi->tx_buf)/* Load data for discontinuous mode */
stm32f4_spi_write_tx(spi);
+ else if (spi->cur_comm == SPI_SIMPLEX_RX)
+ stm32f4_spi_tx_dummy(spi);
}
end_irq:
@@ -1151,7 +1159,9 @@ static int stm32f4_spi_transfer_one_irq(struct stm32_spi *spi)
/* Enable the interrupts relative to the current communication mode */
if (spi->cur_comm == SPI_SIMPLEX_TX || spi->cur_comm == SPI_3WIRE_TX) {
cr2 |= STM32F4_SPI_CR2_TXEIE;
- } else if (spi->cur_comm == SPI_FULL_DUPLEX) {
+ } else if (spi->cur_comm == SPI_FULL_DUPLEX ||
+ spi->cur_comm == SPI_SIMPLEX_RX ||
+ spi->cur_comm == SPI_3WIRE_RX) {
/* In transmit-only mode, the OVR flag is set in the SR register
* since the received data are never read. Therefore set OVR
* interrupt only when rx buffer is available.
@@ -1170,6 +1180,8 @@ static int stm32f4_spi_transfer_one_irq(struct stm32_spi *spi)
/* starting data transfer when buffer is loaded */
if (spi->tx_buf)
stm32f4_spi_write_tx(spi);
+ else if (spi->cur_comm == SPI_SIMPLEX_RX)
+ stm32f4_spi_tx_dummy(spi);
spin_unlock_irqrestore(&spi->lock, flags);
@@ -1462,9 +1474,15 @@ static int stm32f4_spi_set_mode(struct stm32_spi *spi, unsigned int comm_type)
stm32_spi_set_bits(spi, STM32F4_SPI_CR1,
STM32F4_SPI_CR1_BIDIMODE |
STM32F4_SPI_CR1_BIDIOE);
- } else if (comm_type == SPI_FULL_DUPLEX) {
+ } else if (comm_type == SPI_FULL_DUPLEX ||
+ comm_type == SPI_SIMPLEX_RX) {
stm32_spi_clr_bits(spi, STM32F4_SPI_CR1,
STM32F4_SPI_CR1_BIDIMODE |
+ STM32F4_SPI_CR1_RXONLY);
+ } else if (comm_type == SPI_3WIRE_RX) {
+ stm32_spi_set_bits(spi, STM32F4_SPI_CR1,
+ STM32F4_SPI_CR1_BIDIMODE);
+ stm32_spi_clr_bits(spi, STM32F4_SPI_CR1,
STM32F4_SPI_CR1_BIDIOE);
} else {
return -EINVAL;