From b66d7af41f333f3fc960a18714d25474c512bcaa Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Thu, 3 Dec 2020 09:31:35 +0100 Subject: [PATCH] video: seps525: Add seps525 SPI driver Add support for the WiseChip Semiconductor Inc. (UG-6028GDEBF02) display using the SEPS525 (Syncoam) LCD Controller. Syncoam Seps525 PM-Oled is RGB 160x128 display. This driver has been tested through zynq-spi driver. ZynqMP> load mmc 1 100000 rainbow.bmp 61562 bytes read in 20 ms (2.9 MiB/s) ZynqMP> bmp info 100000 Image size : 160 x 128 Bits per pixel: 24 Compression : 0 ZynqMP> bmp display 100000 ZynqMP> setenv stdout vidconsole Signed-off-by: Michal Simek Reviewed-by: Simon Glass --- MAINTAINERS | 1 + drivers/video/Kconfig | 7 ++ drivers/video/Makefile | 1 + drivers/video/seps525.c | 327 ++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 336 insertions(+) create mode 100644 drivers/video/seps525.c diff --git a/MAINTAINERS b/MAINTAINERS index 8e2ccc2..26dd254 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -590,6 +590,7 @@ F: drivers/spi/zynq_qspi.c F: drivers/spi/zynq_spi.c F: drivers/timer/cadence-ttc.c F: drivers/usb/host/ehci-zynq.c +F: drivers/video/seps525.c F: drivers/watchdog/cdns_wdt.c F: include/zynqmppl.h F: include/zynqmp_firmware.h diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 998271b..7136340 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -652,6 +652,13 @@ config VIDEO_NX HDMI. This option enables this support which can be used on devices which have an eDP display connected. +config VIDEO_SEPS525 + bool "Enable video support for Seps525" + depends on DM_VIDEO + help + Enable support for the Syncoam PM-OLED display driver (RGB 160x128). + Currently driver is supporting only SPI interface. + source "drivers/video/nexell/Kconfig" config VIDEO diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 67a492a..9db96aa 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -70,6 +70,7 @@ obj-$(CONFIG_VIDEO_SIMPLE) += simplefb.o obj-$(CONFIG_VIDEO_TEGRA20) += tegra.o obj-$(CONFIG_VIDEO_VCXK) += bus_vcxk.o obj-$(CONFIG_VIDEO_VESA) += vesa.o +obj-$(CONFIG_VIDEO_SEPS525) += seps525.o obj-y += bridge/ obj-y += sunxi/ diff --git a/drivers/video/seps525.c b/drivers/video/seps525.c new file mode 100644 index 0000000..369e5e6 --- /dev/null +++ b/drivers/video/seps525.c @@ -0,0 +1,327 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * FB driver for the WiseChip Semiconductor Inc. (UG-6028GDEBF02) display + * using the SEPS525 (Syncoam) LCD Controller + * + * Copyright (C) 2020 Xilinx Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define WIDTH 160 +#define HEIGHT 128 + +#define SEPS525_INDEX 0x00 +#define SEPS525_STATUS_RD 0x01 +#define SEPS525_OSC_CTL 0x02 +#define SEPS525_IREF 0x80 +#define SEPS525_CLOCK_DIV 0x03 +#define SEPS525_REDUCE_CURRENT 0x04 +#define SEPS525_SOFT_RST 0x05 +#define SEPS525_DISP_ONOFF 0x06 +#define SEPS525_PRECHARGE_TIME_R 0x08 +#define SEPS525_PRECHARGE_TIME_G 0x09 +#define SEPS525_PRECHARGE_TIME_B 0x0A +#define SEPS525_PRECHARGE_CURRENT_R 0x0B +#define SEPS525_PRECHARGE_CURRENT_G 0x0C +#define SEPS525_PRECHARGE_CURRENT_B 0x0D +#define SEPS525_DRIVING_CURRENT_R 0x10 +#define SEPS525_DRIVING_CURRENT_G 0x11 +#define SEPS525_DRIVING_CURRENT_B 0x12 +#define SEPS525_DISPLAYMODE_SET 0x13 +#define SEPS525_RGBIF 0x14 +#define SEPS525_RGB_POL 0x15 +#define SEPS525_MEMORY_WRITEMODE 0x16 +#define SEPS525_MX1_ADDR 0x17 +#define SEPS525_MX2_ADDR 0x18 +#define SEPS525_MY1_ADDR 0x19 +#define SEPS525_MY2_ADDR 0x1A +#define SEPS525_MEMORY_ACCESS_POINTER_X 0x20 +#define SEPS525_MEMORY_ACCESS_POINTER_Y 0x21 +#define SEPS525_DDRAM_DATA_ACCESS_PORT 0x22 +#define SEPS525_GRAY_SCALE_TABLE_INDEX 0x50 +#define SEPS525_GRAY_SCALE_TABLE_DATA 0x51 +#define SEPS525_DUTY 0x28 +#define SEPS525_DSL 0x29 +#define SEPS525_D1_DDRAM_FAC 0x2E +#define SEPS525_D1_DDRAM_FAR 0x2F +#define SEPS525_D2_DDRAM_SAC 0x31 +#define SEPS525_D2_DDRAM_SAR 0x32 +#define SEPS525_SCR1_FX1 0x33 +#define SEPS525_SCR1_FX2 0x34 +#define SEPS525_SCR1_FY1 0x35 +#define SEPS525_SCR1_FY2 0x36 +#define SEPS525_SCR2_SX1 0x37 +#define SEPS525_SCR2_SX2 0x38 +#define SEPS525_SCR2_SY1 0x39 +#define SEPS525_SCR2_SY2 0x3A +#define SEPS525_SCREEN_SAVER_CONTEROL 0x3B +#define SEPS525_SS_SLEEP_TIMER 0x3C +#define SEPS525_SCREEN_SAVER_MODE 0x3D +#define SEPS525_SS_SCR1_FU 0x3E +#define SEPS525_SS_SCR1_MXY 0x3F +#define SEPS525_SS_SCR2_FU 0x40 +#define SEPS525_SS_SCR2_MXY 0x41 +#define SEPS525_MOVING_DIRECTION 0x42 +#define SEPS525_SS_SCR2_SX1 0x47 +#define SEPS525_SS_SCR2_SX2 0x48 +#define SEPS525_SS_SCR2_SY1 0x49 +#define SEPS525_SS_SCR2_SY2 0x4A + +/* SEPS525_DISPLAYMODE_SET */ +#define MODE_SWAP_BGR BIT(7) +#define MODE_SM BIT(6) +#define MODE_RD BIT(5) +#define MODE_CD BIT(4) + +/** + * struct seps525_priv - Private structure + * @reset_gpio: Reset gpio pin + * @dc_gpio: Data/command control gpio pin + * @dev: Device uclass for video_ops + */ +struct seps525_priv { + struct gpio_desc reset_gpio; + struct gpio_desc dc_gpio; + struct udevice *dev; +}; + +static int seps525_spi_write_cmd(struct udevice *dev, u32 reg) +{ + struct seps525_priv *priv = dev_get_priv(dev); + u8 buf8 = reg; + int ret; + + ret = dm_gpio_set_value(&priv->dc_gpio, 0); + if (ret) { + dev_dbg(dev, "Failed to handle dc\n"); + return ret; + } + + ret = dm_spi_xfer(dev, 8, &buf8, NULL, SPI_XFER_BEGIN | SPI_XFER_END); + if (ret) + dev_dbg(dev, "Failed to write command\n"); + + return ret; +} + +static int seps525_spi_write_data(struct udevice *dev, u32 val) +{ + struct seps525_priv *priv = dev_get_priv(dev); + u8 buf8 = val; + int ret; + + ret = dm_gpio_set_value(&priv->dc_gpio, 1); + if (ret) { + dev_dbg(dev, "Failed to handle dc\n"); + return ret; + } + + ret = dm_spi_xfer(dev, 8, &buf8, NULL, SPI_XFER_BEGIN | SPI_XFER_END); + if (ret) + dev_dbg(dev, "Failed to write data\n"); + + return ret; +} + +static void seps525_spi_write(struct udevice *dev, u32 reg, u32 val) +{ + (void)seps525_spi_write_cmd(dev, reg); + (void)seps525_spi_write_data(dev, val); +} + +static int seps525_display_init(struct udevice *dev) +{ + /* Disable Oscillator Power Down */ + seps525_spi_write(dev, SEPS525_REDUCE_CURRENT, 0x03); + mdelay(5); + + /* Set Normal Driving Current */ + seps525_spi_write(dev, SEPS525_REDUCE_CURRENT, 0x00); + mdelay(5); + + seps525_spi_write(dev, SEPS525_SCREEN_SAVER_CONTEROL, 0x00); + /* Set EXPORT1 Pin at Internal Clock */ + seps525_spi_write(dev, SEPS525_OSC_CTL, 0x01); + /* Set Clock as 120 Frames/Sec */ + seps525_spi_write(dev, SEPS525_CLOCK_DIV, 0x90); + /* Set Reference Voltage Controlled by External Resister */ + seps525_spi_write(dev, SEPS525_IREF, 0x01); + + /* precharge time R G B */ + seps525_spi_write(dev, SEPS525_PRECHARGE_TIME_R, 0x04); + seps525_spi_write(dev, SEPS525_PRECHARGE_TIME_G, 0x05); + seps525_spi_write(dev, SEPS525_PRECHARGE_TIME_B, 0x05); + + /* precharge current R G B (uA) */ + seps525_spi_write(dev, SEPS525_PRECHARGE_CURRENT_R, 0x9D); + seps525_spi_write(dev, SEPS525_PRECHARGE_CURRENT_G, 0x8C); + seps525_spi_write(dev, SEPS525_PRECHARGE_CURRENT_B, 0x57); + + /* driving current R G B (uA) */ + seps525_spi_write(dev, SEPS525_DRIVING_CURRENT_R, 0x56); + seps525_spi_write(dev, SEPS525_DRIVING_CURRENT_G, 0x4D); + seps525_spi_write(dev, SEPS525_DRIVING_CURRENT_B, 0x46); + /* Set Color Sequence */ + seps525_spi_write(dev, SEPS525_DISPLAYMODE_SET, 0x00); + /* Set MCU Interface Mode */ + seps525_spi_write(dev, SEPS525_RGBIF, 0x01); + /* Set Memory Write Mode */ + seps525_spi_write(dev, SEPS525_MEMORY_WRITEMODE, 0x66); + /* 1/128 Duty (0x0F~0x7F) */ + seps525_spi_write(dev, SEPS525_DUTY, 0x7F); + /* Set Mapping RAM Display Start Line (0x00~0x7F) */ + seps525_spi_write(dev, SEPS525_DSL, 0x00); + /* Display On (0x00/0x01) */ + seps525_spi_write(dev, SEPS525_DISP_ONOFF, 0x01); + /* Set All Internal Register Value as Normal Mode */ + seps525_spi_write(dev, SEPS525_SOFT_RST, 0x00); + /* Set RGB Interface Polarity as Active Low */ + seps525_spi_write(dev, SEPS525_RGB_POL, 0x00); + + /* Enable access for data */ + (void)seps525_spi_write_cmd(dev, SEPS525_DDRAM_DATA_ACCESS_PORT); + + return 0; +} + +static int seps525_spi_startup(struct udevice *dev) +{ + struct seps525_priv *priv = dev_get_priv(dev); + int ret; + + ret = dm_gpio_set_value(&priv->reset_gpio, 1); + if (ret) + return ret; + + ret = dm_gpio_set_value(&priv->reset_gpio, 0); + if (ret) + return ret; + + ret = dm_spi_claim_bus(dev); + if (ret) { + dev_err(dev, "Failed to claim SPI bus: %d\n", ret); + return ret; + } + + ret = seps525_display_init(dev); + if (ret) + return ret; + + dm_spi_release_bus(dev); + + return 0; +} + +static int seps525_sync(struct udevice *vid) +{ + struct video_priv *uc_priv = dev_get_uclass_priv(vid); + struct seps525_priv *priv = dev_get_priv(vid); + struct udevice *dev = priv->dev; + int i, ret; + u8 data1, data2; + u8 *start = uc_priv->fb; + + ret = dm_spi_claim_bus(dev); + if (ret) { + dev_err(dev, "Failed to claim SPI bus: %d\n", ret); + return ret; + } + + /* start position X,Y */ + seps525_spi_write(dev, SEPS525_MEMORY_ACCESS_POINTER_X, 0); + seps525_spi_write(dev, SEPS525_MEMORY_ACCESS_POINTER_Y, 0); + + /* Enable access for data */ + (void)seps525_spi_write_cmd(dev, SEPS525_DDRAM_DATA_ACCESS_PORT); + + for (i = 0; i < (uc_priv->xsize * uc_priv->ysize); i++) { + data2 = *start++; + data1 = *start++; + (void)seps525_spi_write_data(dev, data1); + (void)seps525_spi_write_data(dev, data2); + } + + dm_spi_release_bus(dev); + + return 0; +} + +static int seps525_probe(struct udevice *dev) +{ + struct video_priv *uc_priv = dev_get_uclass_priv(dev); + struct seps525_priv *priv = dev_get_priv(dev); + u32 buswidth; + int ret; + + buswidth = dev_read_u32_default(dev, "buswidth", 0); + if (buswidth != 8) { + dev_err(dev, "Only 8bit buswidth is supported now"); + return -EINVAL; + } + + ret = gpio_request_by_name(dev, "reset-gpios", 0, + &priv->reset_gpio, GPIOD_IS_OUT); + if (ret) { + dev_err(dev, "missing reset GPIO\n"); + return ret; + } + + ret = gpio_request_by_name(dev, "dc-gpios", 0, + &priv->dc_gpio, GPIOD_IS_OUT); + if (ret) { + dev_err(dev, "missing dc GPIO\n"); + return ret; + } + + uc_priv->bpix = VIDEO_BPP16; + uc_priv->xsize = WIDTH; + uc_priv->ysize = HEIGHT; + uc_priv->rot = 0; + + priv->dev = dev; + + ret = seps525_spi_startup(dev); + if (ret) + return ret; + + return 0; +} + +static int seps525_bind(struct udevice *dev) +{ + struct video_uc_platdata *plat = dev_get_uclass_platdata(dev); + + plat->size = WIDTH * HEIGHT * 16; + + return 0; +} + +static const struct video_ops seps525_ops = { + .video_sync = seps525_sync, +}; + +static const struct udevice_id seps525_ids[] = { + { .compatible = "syncoam,seps525" }, + { } +}; + +U_BOOT_DRIVER(seps525_video) = { + .name = "seps525_video", + .id = UCLASS_VIDEO, + .of_match = seps525_ids, + .ops = &seps525_ops, + .platdata_auto_alloc_size = sizeof(struct video_uc_platdata), + .bind = seps525_bind, + .probe = seps525_probe, + .priv_auto_alloc_size = sizeof(struct seps525_priv), +}; -- 2.7.4