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fb: backlight: add the Himax HX-8357B LCD controller
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Jingoo Han <jg1.han@samsung.com> Cc: Shawn Guo <shawn.guo@linaro.org> Cc: Brian Lilly <brian@crystalfontz.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Maxime Ripard
Linus Torvalds
parent
a5f822114c
commit
8a6c1dd551
@ -134,6 +134,13 @@ config LCD_LMS501KF03
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If you have an LMS501KF03 LCD Panel, say Y to enable its
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LCD control driver.
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config LCD_HX8357
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tristate "Himax HX-8357 LCD Driver"
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depends on SPI
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help
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If you have a HX-8357 LCD panel, say Y to enable its LCD control
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driver.
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endif # LCD_CLASS_DEVICE
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#
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@ -3,6 +3,7 @@
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obj-$(CONFIG_LCD_CLASS_DEVICE) += lcd.o
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obj-$(CONFIG_LCD_CORGI) += corgi_lcd.o
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obj-$(CONFIG_LCD_HP700) += jornada720_lcd.o
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obj-$(CONFIG_LCD_HX8357) += hx8357.o
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obj-$(CONFIG_LCD_L4F00242T03) += l4f00242t03.o
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obj-$(CONFIG_LCD_LMS283GF05) += lms283gf05.o
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obj-$(CONFIG_LCD_LTV350QV) += ltv350qv.o
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497
drivers/video/backlight/hx8357.c
Normal file
497
drivers/video/backlight/hx8357.c
Normal file
@ -0,0 +1,497 @@
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/*
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* Driver for the Himax HX-8357 LCD Controller
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*
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* Copyright 2012 Free Electrons
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*
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* Licensed under the GPLv2 or later.
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*/
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#include <linux/delay.h>
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#include <linux/lcd.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/spi/spi.h>
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#define HX8357_NUM_IM_PINS 3
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#define HX8357_SWRESET 0x01
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#define HX8357_GET_RED_CHANNEL 0x06
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#define HX8357_GET_GREEN_CHANNEL 0x07
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#define HX8357_GET_BLUE_CHANNEL 0x08
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#define HX8357_GET_POWER_MODE 0x0a
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#define HX8357_GET_MADCTL 0x0b
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#define HX8357_GET_PIXEL_FORMAT 0x0c
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#define HX8357_GET_DISPLAY_MODE 0x0d
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#define HX8357_GET_SIGNAL_MODE 0x0e
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#define HX8357_GET_DIAGNOSTIC_RESULT 0x0f
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#define HX8357_ENTER_SLEEP_MODE 0x10
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#define HX8357_EXIT_SLEEP_MODE 0x11
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#define HX8357_ENTER_PARTIAL_MODE 0x12
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#define HX8357_ENTER_NORMAL_MODE 0x13
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#define HX8357_EXIT_INVERSION_MODE 0x20
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#define HX8357_ENTER_INVERSION_MODE 0x21
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#define HX8357_SET_DISPLAY_OFF 0x28
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#define HX8357_SET_DISPLAY_ON 0x29
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#define HX8357_SET_COLUMN_ADDRESS 0x2a
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#define HX8357_SET_PAGE_ADDRESS 0x2b
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#define HX8357_WRITE_MEMORY_START 0x2c
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#define HX8357_READ_MEMORY_START 0x2e
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#define HX8357_SET_PARTIAL_AREA 0x30
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#define HX8357_SET_SCROLL_AREA 0x33
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#define HX8357_SET_TEAR_OFF 0x34
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#define HX8357_SET_TEAR_ON 0x35
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#define HX8357_SET_ADDRESS_MODE 0x36
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#define HX8357_SET_SCROLL_START 0x37
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#define HX8357_EXIT_IDLE_MODE 0x38
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#define HX8357_ENTER_IDLE_MODE 0x39
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#define HX8357_SET_PIXEL_FORMAT 0x3a
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#define HX8357_SET_PIXEL_FORMAT_DBI_3BIT (0x1)
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#define HX8357_SET_PIXEL_FORMAT_DBI_16BIT (0x5)
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#define HX8357_SET_PIXEL_FORMAT_DBI_18BIT (0x6)
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#define HX8357_SET_PIXEL_FORMAT_DPI_3BIT (0x1 << 4)
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#define HX8357_SET_PIXEL_FORMAT_DPI_16BIT (0x5 << 4)
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#define HX8357_SET_PIXEL_FORMAT_DPI_18BIT (0x6 << 4)
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#define HX8357_WRITE_MEMORY_CONTINUE 0x3c
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#define HX8357_READ_MEMORY_CONTINUE 0x3e
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#define HX8357_SET_TEAR_SCAN_LINES 0x44
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#define HX8357_GET_SCAN_LINES 0x45
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#define HX8357_READ_DDB_START 0xa1
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#define HX8357_SET_DISPLAY_MODE 0xb4
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#define HX8357_SET_DISPLAY_MODE_RGB_THROUGH (0x3)
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#define HX8357_SET_DISPLAY_MODE_RGB_INTERFACE (1 << 4)
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#define HX8357_SET_PANEL_DRIVING 0xc0
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#define HX8357_SET_DISPLAY_FRAME 0xc5
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#define HX8357_SET_RGB 0xc6
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#define HX8357_SET_RGB_ENABLE_HIGH (1 << 1)
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#define HX8357_SET_GAMMA 0xc8
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#define HX8357_SET_POWER 0xd0
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#define HX8357_SET_VCOM 0xd1
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#define HX8357_SET_POWER_NORMAL 0xd2
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#define HX8357_SET_PANEL_RELATED 0xe9
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struct hx8357_data {
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unsigned im_pins[HX8357_NUM_IM_PINS];
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unsigned reset;
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struct spi_device *spi;
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int state;
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};
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static u8 hx8357_seq_power[] = {
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HX8357_SET_POWER, 0x44, 0x41, 0x06,
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};
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static u8 hx8357_seq_vcom[] = {
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HX8357_SET_VCOM, 0x40, 0x10,
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};
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static u8 hx8357_seq_power_normal[] = {
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HX8357_SET_POWER_NORMAL, 0x05, 0x12,
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};
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static u8 hx8357_seq_panel_driving[] = {
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HX8357_SET_PANEL_DRIVING, 0x14, 0x3b, 0x00, 0x02, 0x11,
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};
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static u8 hx8357_seq_display_frame[] = {
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HX8357_SET_DISPLAY_FRAME, 0x0c,
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};
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static u8 hx8357_seq_panel_related[] = {
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HX8357_SET_PANEL_RELATED, 0x01,
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};
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static u8 hx8357_seq_undefined1[] = {
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0xea, 0x03, 0x00, 0x00,
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};
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static u8 hx8357_seq_undefined2[] = {
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0xeb, 0x40, 0x54, 0x26, 0xdb,
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};
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static u8 hx8357_seq_gamma[] = {
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HX8357_SET_GAMMA, 0x00, 0x15, 0x00, 0x22, 0x00,
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0x08, 0x77, 0x26, 0x77, 0x22, 0x04, 0x00,
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};
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static u8 hx8357_seq_address_mode[] = {
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HX8357_SET_ADDRESS_MODE, 0xc0,
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};
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static u8 hx8357_seq_pixel_format[] = {
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HX8357_SET_PIXEL_FORMAT,
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HX8357_SET_PIXEL_FORMAT_DPI_18BIT |
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HX8357_SET_PIXEL_FORMAT_DBI_18BIT,
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};
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static u8 hx8357_seq_column_address[] = {
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HX8357_SET_COLUMN_ADDRESS, 0x00, 0x00, 0x01, 0x3f,
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};
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static u8 hx8357_seq_page_address[] = {
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HX8357_SET_PAGE_ADDRESS, 0x00, 0x00, 0x01, 0xdf,
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};
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static u8 hx8357_seq_rgb[] = {
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HX8357_SET_RGB, 0x02,
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};
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static u8 hx8357_seq_display_mode[] = {
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HX8357_SET_DISPLAY_MODE,
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HX8357_SET_DISPLAY_MODE_RGB_THROUGH |
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HX8357_SET_DISPLAY_MODE_RGB_INTERFACE,
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};
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static int hx8357_spi_write_then_read(struct lcd_device *lcdev,
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u8 *txbuf, u16 txlen,
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u8 *rxbuf, u16 rxlen)
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{
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struct hx8357_data *lcd = lcd_get_data(lcdev);
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struct spi_message msg;
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struct spi_transfer xfer[2];
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u16 *local_txbuf = NULL;
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int ret = 0;
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memset(xfer, 0, sizeof(xfer));
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spi_message_init(&msg);
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if (txlen) {
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int i;
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local_txbuf = kcalloc(txlen, sizeof(*local_txbuf), GFP_KERNEL);
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if (!local_txbuf)
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return -ENOMEM;
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for (i = 0; i < txlen; i++) {
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local_txbuf[i] = txbuf[i];
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if (i > 0)
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local_txbuf[i] |= 1 << 8;
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}
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xfer[0].len = 2 * txlen;
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xfer[0].bits_per_word = 9;
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xfer[0].tx_buf = local_txbuf;
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spi_message_add_tail(&xfer[0], &msg);
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}
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if (rxlen) {
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xfer[1].len = rxlen;
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xfer[1].bits_per_word = 8;
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xfer[1].rx_buf = rxbuf;
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spi_message_add_tail(&xfer[1], &msg);
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}
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ret = spi_sync(lcd->spi, &msg);
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if (ret < 0)
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dev_err(&lcdev->dev, "Couldn't send SPI data\n");
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if (txlen)
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kfree(local_txbuf);
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return ret;
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}
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static inline int hx8357_spi_write_array(struct lcd_device *lcdev,
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u8 *value, u8 len)
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{
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return hx8357_spi_write_then_read(lcdev, value, len, NULL, 0);
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}
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static inline int hx8357_spi_write_byte(struct lcd_device *lcdev,
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u8 value)
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{
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return hx8357_spi_write_then_read(lcdev, &value, 1, NULL, 0);
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}
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static int hx8357_enter_standby(struct lcd_device *lcdev)
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{
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int ret;
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ret = hx8357_spi_write_byte(lcdev, HX8357_SET_DISPLAY_OFF);
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if (ret < 0)
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return ret;
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usleep_range(10000, 12000);
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ret = hx8357_spi_write_byte(lcdev, HX8357_ENTER_SLEEP_MODE);
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if (ret < 0)
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return ret;
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msleep(120);
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return 0;
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}
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static int hx8357_exit_standby(struct lcd_device *lcdev)
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{
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int ret;
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ret = hx8357_spi_write_byte(lcdev, HX8357_EXIT_SLEEP_MODE);
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if (ret < 0)
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return ret;
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msleep(120);
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ret = hx8357_spi_write_byte(lcdev, HX8357_SET_DISPLAY_ON);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int hx8357_lcd_init(struct lcd_device *lcdev)
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{
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struct hx8357_data *lcd = lcd_get_data(lcdev);
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int ret;
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/*
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* Set the interface selection pins to SPI mode, with three
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* wires
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*/
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gpio_set_value_cansleep(lcd->im_pins[0], 1);
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gpio_set_value_cansleep(lcd->im_pins[1], 0);
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gpio_set_value_cansleep(lcd->im_pins[2], 1);
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/* Reset the screen */
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gpio_set_value(lcd->reset, 1);
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usleep_range(10000, 12000);
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gpio_set_value(lcd->reset, 0);
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usleep_range(10000, 12000);
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gpio_set_value(lcd->reset, 1);
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msleep(120);
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_power,
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ARRAY_SIZE(hx8357_seq_power));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_vcom,
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ARRAY_SIZE(hx8357_seq_vcom));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_power_normal,
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ARRAY_SIZE(hx8357_seq_power_normal));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_panel_driving,
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ARRAY_SIZE(hx8357_seq_panel_driving));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_display_frame,
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ARRAY_SIZE(hx8357_seq_display_frame));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_panel_related,
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ARRAY_SIZE(hx8357_seq_panel_related));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_undefined1,
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ARRAY_SIZE(hx8357_seq_undefined1));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_undefined2,
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ARRAY_SIZE(hx8357_seq_undefined2));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_gamma,
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ARRAY_SIZE(hx8357_seq_gamma));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_address_mode,
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ARRAY_SIZE(hx8357_seq_address_mode));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_pixel_format,
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ARRAY_SIZE(hx8357_seq_pixel_format));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_column_address,
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ARRAY_SIZE(hx8357_seq_column_address));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_page_address,
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ARRAY_SIZE(hx8357_seq_page_address));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_rgb,
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ARRAY_SIZE(hx8357_seq_rgb));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_array(lcdev, hx8357_seq_display_mode,
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ARRAY_SIZE(hx8357_seq_display_mode));
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if (ret < 0)
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return ret;
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ret = hx8357_spi_write_byte(lcdev, HX8357_EXIT_SLEEP_MODE);
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if (ret < 0)
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return ret;
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msleep(120);
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ret = hx8357_spi_write_byte(lcdev, HX8357_SET_DISPLAY_ON);
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if (ret < 0)
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return ret;
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usleep_range(5000, 7000);
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ret = hx8357_spi_write_byte(lcdev, HX8357_WRITE_MEMORY_START);
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if (ret < 0)
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return ret;
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return 0;
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}
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#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL)
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static int hx8357_set_power(struct lcd_device *lcdev, int power)
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{
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struct hx8357_data *lcd = lcd_get_data(lcdev);
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int ret = 0;
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if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->state))
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ret = hx8357_exit_standby(lcdev);
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else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->state))
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ret = hx8357_enter_standby(lcdev);
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if (ret == 0)
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lcd->state = power;
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else
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dev_warn(&lcdev->dev, "failed to set power mode %d\n", power);
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return ret;
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}
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static int hx8357_get_power(struct lcd_device *lcdev)
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{
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struct hx8357_data *lcd = lcd_get_data(lcdev);
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return lcd->state;
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}
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static struct lcd_ops hx8357_ops = {
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.set_power = hx8357_set_power,
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.get_power = hx8357_get_power,
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};
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static int hx8357_probe(struct spi_device *spi)
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{
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struct lcd_device *lcdev;
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struct hx8357_data *lcd;
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int i, ret;
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|
||||
lcd = devm_kzalloc(&spi->dev, sizeof(*lcd), GFP_KERNEL);
|
||||
if (!lcd) {
|
||||
dev_err(&spi->dev, "Couldn't allocate lcd internal structure!\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
ret = spi_setup(spi);
|
||||
if (ret < 0) {
|
||||
dev_err(&spi->dev, "SPI setup failed.\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
lcd->spi = spi;
|
||||
|
||||
lcd->reset = of_get_named_gpio(spi->dev.of_node, "gpios-reset", 0);
|
||||
if (!gpio_is_valid(lcd->reset)) {
|
||||
dev_err(&spi->dev, "Missing dt property: gpios-reset\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = devm_gpio_request_one(&spi->dev, lcd->reset,
|
||||
GPIOF_OUT_INIT_HIGH,
|
||||
"hx8357-reset");
|
||||
if (ret) {
|
||||
dev_err(&spi->dev,
|
||||
"failed to request gpio %d: %d\n",
|
||||
lcd->reset, ret);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
for (i = 0; i < HX8357_NUM_IM_PINS; i++) {
|
||||
lcd->im_pins[i] = of_get_named_gpio(spi->dev.of_node,
|
||||
"im-gpios", i);
|
||||
if (lcd->im_pins[i] == -EPROBE_DEFER) {
|
||||
dev_info(&spi->dev, "GPIO requested is not here yet, deferring the probe\n");
|
||||
return -EPROBE_DEFER;
|
||||
}
|
||||
if (!gpio_is_valid(lcd->im_pins[i])) {
|
||||
dev_err(&spi->dev, "Missing dt property: im-gpios\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
ret = devm_gpio_request_one(&spi->dev, lcd->im_pins[i],
|
||||
GPIOF_OUT_INIT_LOW, "im_pins");
|
||||
if (ret) {
|
||||
dev_err(&spi->dev, "failed to request gpio %d: %d\n",
|
||||
lcd->im_pins[i], ret);
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
lcdev = lcd_device_register("mxsfb", &spi->dev, lcd, &hx8357_ops);
|
||||
if (IS_ERR(lcdev)) {
|
||||
ret = PTR_ERR(lcdev);
|
||||
return ret;
|
||||
}
|
||||
spi_set_drvdata(spi, lcdev);
|
||||
|
||||
ret = hx8357_lcd_init(lcdev);
|
||||
if (ret) {
|
||||
dev_err(&spi->dev, "Couldn't initialize panel\n");
|
||||
goto init_error;
|
||||
}
|
||||
|
||||
dev_info(&spi->dev, "Panel probed\n");
|
||||
|
||||
return 0;
|
||||
|
||||
init_error:
|
||||
lcd_device_unregister(lcdev);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int hx8357_remove(struct spi_device *spi)
|
||||
{
|
||||
struct lcd_device *lcdev = spi_get_drvdata(spi);
|
||||
|
||||
lcd_device_unregister(lcdev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id hx8357_dt_ids[] = {
|
||||
{ .compatible = "himax,hx8357" },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, hx8357_dt_ids);
|
||||
|
||||
static struct spi_driver hx8357_driver = {
|
||||
.probe = hx8357_probe,
|
||||
.remove = hx8357_remove,
|
||||
.driver = {
|
||||
.name = "hx8357",
|
||||
.of_match_table = of_match_ptr(hx8357_dt_ids),
|
||||
},
|
||||
};
|
||||
|
||||
module_spi_driver(hx8357_driver);
|
||||
|
||||
MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
|
||||
MODULE_DESCRIPTION("Himax HX-8357 LCD Driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user