Some boards use device tree for almost all board-specific configuration. They therefore do not need their own separate board code, but can all use the same version. Add a common version of the board code. It uses the PMIC, regulator and video bridge uclasses. This will support smdk5250, smdk5420, snow, spring, pit and pi. Signed-off-by: Simon Glass <sjg@chromium.org>master
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/*
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* Copyright (C) 2012 Samsung Electronics |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <dm.h> |
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#include <dwc3-uboot.h> |
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#include <fdtdec.h> |
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#include <asm/io.h> |
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#include <errno.h> |
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#include <i2c.h> |
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#include <mmc.h> |
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#include <netdev.h> |
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#include <samsung-usb-phy-uboot.h> |
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#include <spi.h> |
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#include <usb.h> |
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#include <video_bridge.h> |
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#include <asm/gpio.h> |
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#include <asm/arch/cpu.h> |
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#include <asm/arch/dwmmc.h> |
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#include <asm/arch/mmc.h> |
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#include <asm/arch/pinmux.h> |
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#include <asm/arch/power.h> |
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#include <asm/arch/sromc.h> |
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#include <power/pmic.h> |
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#include <power/max77686_pmic.h> |
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#include <power/regulator.h> |
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#include <power/s5m8767.h> |
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#include <tmu.h> |
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DECLARE_GLOBAL_DATA_PTR; |
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static void board_enable_audio_codec(void) |
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{ |
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int node, ret; |
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struct gpio_desc en_gpio; |
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node = fdtdec_next_compatible(gd->fdt_blob, 0, |
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COMPAT_SAMSUNG_EXYNOS5_SOUND); |
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if (node <= 0) |
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return; |
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ret = gpio_request_by_name_nodev(gd->fdt_blob, node, |
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"codec-enable-gpio", 0, &en_gpio, |
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GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE); |
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if (ret == -FDT_ERR_NOTFOUND) |
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return; |
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/* Turn on the GPIO which connects to the codec's "enable" line. */ |
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gpio_set_pull(gpio_get_number(&en_gpio), S5P_GPIO_PULL_NONE); |
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#ifdef CONFIG_SOUND_MAX98095 |
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/* Enable MAX98095 Codec */ |
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gpio_request(EXYNOS5_GPIO_X17, "max98095_enable"); |
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gpio_direction_output(EXYNOS5_GPIO_X17, 1); |
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gpio_set_pull(EXYNOS5_GPIO_X17, S5P_GPIO_PULL_NONE); |
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#endif |
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} |
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int exynos_init(void) |
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{ |
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board_enable_audio_codec(); |
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return 0; |
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} |
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static int exynos_set_regulator(const char *name, uint uv) |
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{ |
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struct udevice *dev; |
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int ret; |
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ret = regulator_get_by_platname(name, &dev); |
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if (ret) { |
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debug("%s: Cannot find regulator %s\n", __func__, name); |
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return ret; |
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} |
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ret = regulator_set_value(dev, uv); |
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if (ret) { |
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debug("%s: Cannot set regulator %s\n", __func__, name); |
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return ret; |
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} |
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return 0; |
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} |
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int exynos_power_init(void) |
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{ |
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struct udevice *dev; |
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int ret; |
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ret = pmic_get("max77686", &dev); |
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if (!ret) { |
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/* TODO(sjg@chromium.org): Move into the clock/pmic API */ |
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ret = pmic_clrsetbits(dev, MAX77686_REG_PMIC_32KHZ, 0, |
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MAX77686_32KHCP_EN); |
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if (ret) |
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return ret; |
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ret = pmic_clrsetbits(dev, MAX77686_REG_PMIC_BBAT, 0, |
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MAX77686_BBCHOSTEN | MAX77686_BBCVS_3_5V); |
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if (ret) |
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return ret; |
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} else { |
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ret = pmic_get("s5m8767-pmic", &dev); |
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/* TODO(sjg@chromium.org): Use driver model to access clock */ |
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#ifdef CONFIG_PMIC_S5M8767 |
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if (!ret) |
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s5m8767_enable_32khz_cp(dev); |
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#endif |
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} |
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if (ret == -ENODEV) |
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return 0; |
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ret = regulators_enable_boot_on(false); |
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if (ret) |
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return ret; |
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ret = exynos_set_regulator("vdd_mif", 1100000); |
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if (ret) |
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return ret; |
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/*
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* This would normally be 1.3V, but since we are running slowly 1V |
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* is enough. For spring it helps reduce CPU temperature and avoid |
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* hangs with the case open. |
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*/ |
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ret = exynos_set_regulator("vdd_arm", 1000000); |
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if (ret) |
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return ret; |
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ret = exynos_set_regulator("vdd_int", 1012500); |
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if (ret) |
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return ret; |
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ret = exynos_set_regulator("vdd_g3d", 1200000); |
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if (ret) |
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return ret; |
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return 0; |
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} |
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int board_get_revision(void) |
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{ |
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return 0; |
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} |
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#ifdef CONFIG_LCD |
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static int board_dp_bridge_init(struct udevice *dev) |
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{ |
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const int max_tries = 10; |
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int num_tries; |
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int ret; |
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debug("%s\n", __func__); |
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ret = video_bridge_attach(dev); |
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if (ret) { |
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debug("video bridge init failed: %d\n", ret); |
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return ret; |
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} |
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/*
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* We need to wait for 90ms after bringing up the bridge since there |
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* is a phantom "high" on the HPD chip during its bootup. The phantom |
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* high comes within 7ms of de-asserting PD and persists for at least |
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* 15ms. The real high comes roughly 50ms after PD is de-asserted. The |
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* phantom high makes it hard for us to know when the NXP chip is up. |
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*/ |
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mdelay(90); |
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for (num_tries = 0; num_tries < max_tries; num_tries++) { |
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/* Check HPD. If it's high, or we don't have it, all is well */ |
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ret = video_bridge_check_attached(dev); |
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if (!ret || ret == -ENOENT) |
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return 0; |
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debug("%s: eDP bridge failed to come up; try %d of %d\n", |
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__func__, num_tries, max_tries); |
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} |
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/* Immediately go into bridge reset if the hp line is not high */ |
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return -EIO; |
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} |
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static int board_dp_bridge_setup(const void *blob) |
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{ |
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const int max_tries = 2; |
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int num_tries; |
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struct udevice *dev; |
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int ret; |
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/* Configure I2C registers for Parade bridge */ |
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ret = uclass_get_device(UCLASS_VIDEO_BRIDGE, 0, &dev); |
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if (ret) { |
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debug("video bridge init failed: %d\n", ret); |
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return ret; |
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} |
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if (strncmp(dev->driver->name, "parade", 6)) { |
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/* Mux HPHPD to the special hotplug detect mode */ |
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exynos_pinmux_config(PERIPH_ID_DPHPD, 0); |
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} |
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for (num_tries = 0; num_tries < max_tries; num_tries++) { |
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ret = board_dp_bridge_init(dev); |
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if (!ret) |
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return 0; |
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if (num_tries == max_tries - 1) |
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break; |
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/*
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* If we're here, the bridge chip failed to initialise. |
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* Power down the bridge in an attempt to reset. |
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*/ |
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video_bridge_set_active(dev, false); |
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/*
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* Arbitrarily wait 300ms here with DP_N low. Don't know for |
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* sure how long we should wait, but we're being paranoid. |
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*/ |
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mdelay(300); |
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} |
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return ret; |
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} |
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void exynos_cfg_lcd_gpio(void) |
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{ |
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/* For Backlight */ |
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gpio_request(EXYNOS5_GPIO_B20, "lcd_backlight"); |
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gpio_cfg_pin(EXYNOS5_GPIO_B20, S5P_GPIO_OUTPUT); |
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gpio_set_value(EXYNOS5_GPIO_B20, 1); |
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} |
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void exynos_set_dp_phy(unsigned int onoff) |
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{ |
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set_dp_phy_ctrl(onoff); |
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} |
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static int board_dp_set_backlight(int percent) |
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{ |
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struct udevice *dev; |
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int ret; |
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ret = uclass_get_device(UCLASS_VIDEO_BRIDGE, 0, &dev); |
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if (!ret) |
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ret = video_bridge_set_backlight(dev, percent); |
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return ret; |
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} |
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void exynos_backlight_on(unsigned int on) |
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{ |
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struct udevice *dev; |
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int ret; |
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debug("%s(%u)\n", __func__, on); |
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if (!on) |
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return; |
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ret = regulator_get_by_platname("vcd_led", &dev); |
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if (!ret) |
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ret = regulator_set_enable(dev, true); |
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if (ret) |
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debug("Failed to enable backlight: ret=%d\n", ret); |
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/* T5 in the LCD timing spec (defined as > 10ms) */ |
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mdelay(10); |
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/* board_dp_backlight_pwm */ |
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gpio_direction_output(EXYNOS5_GPIO_B20, 1); |
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/* T6 in the LCD timing spec (defined as > 10ms) */ |
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mdelay(10); |
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/* try to set the backlight in the bridge registers */ |
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ret = board_dp_set_backlight(80); |
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/* if we have no bridge or it does not support backlight, use a GPIO */ |
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if (ret == -ENODEV || ret == -ENOSYS) { |
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gpio_request(EXYNOS5_GPIO_X30, "board_dp_backlight_en"); |
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gpio_direction_output(EXYNOS5_GPIO_X30, 1); |
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} |
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} |
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void exynos_lcd_power_on(void) |
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{ |
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struct udevice *dev; |
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int ret; |
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debug("%s\n", __func__); |
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ret = regulator_get_by_platname("lcd_vdd", &dev); |
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if (!ret) |
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ret = regulator_set_enable(dev, true); |
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if (ret) |
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debug("Failed to enable LCD panel: ret=%d\n", ret); |
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ret = board_dp_bridge_setup(gd->fdt_blob); |
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if (ret && ret != -ENODEV) |
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printf("LCD bridge failed to enable: %d\n", ret); |
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} |
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#endif |
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#ifdef CONFIG_USB_DWC3 |
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static struct dwc3_device dwc3_device_data = { |
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.maximum_speed = USB_SPEED_SUPER, |
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.base = 0x12400000, |
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.dr_mode = USB_DR_MODE_PERIPHERAL, |
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.index = 0, |
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}; |
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int usb_gadget_handle_interrupts(void) |
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{ |
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dwc3_uboot_handle_interrupt(0); |
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return 0; |
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} |
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int board_usb_init(int index, enum usb_init_type init) |
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{ |
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struct exynos_usb3_phy *phy = (struct exynos_usb3_phy *) |
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samsung_get_base_usb3_phy(); |
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if (!phy) { |
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error("usb3 phy not supported"); |
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return -ENODEV; |
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} |
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set_usbdrd_phy_ctrl(POWER_USB_DRD_PHY_CTRL_EN); |
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exynos5_usb3_phy_init(phy); |
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return dwc3_uboot_init(&dwc3_device_data); |
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} |
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#endif |
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#ifdef CONFIG_SET_DFU_ALT_INFO |
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char *get_dfu_alt_system(char *interface, char *devstr) |
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{ |
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return getenv("dfu_alt_system"); |
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} |
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char *get_dfu_alt_boot(char *interface, char *devstr) |
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{ |
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struct mmc *mmc; |
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char *alt_boot; |
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int dev_num; |
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dev_num = simple_strtoul(devstr, NULL, 10); |
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mmc = find_mmc_device(dev_num); |
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if (!mmc) |
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return NULL; |
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if (mmc_init(mmc)) |
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return NULL; |
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if (IS_SD(mmc)) |
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alt_boot = CONFIG_DFU_ALT_BOOT_SD; |
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else |
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alt_boot = CONFIG_DFU_ALT_BOOT_EMMC; |
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return alt_boot; |
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} |
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#endif |
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