David Hendricks (dhendrix@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2931
-gerrit
commit 01945869655858c409f3288f8ef1f8d6ca66683b Author: Ronald G. Minnich rminnich@gmail.com Date: Mon Mar 18 09:49:54 2013 -0700
samsung/exynos5: init display port and LCD
This adds resources for the display port controller and attempts to go thru the init sequence.
TODO: split this apart when we have something working...
Change-Id: I2caa350f8c0e681f71e9646898dcdb36e10115b2 Signed-off-by: Ronald G. Minnich rminnich@gmail.com Signed-off-by: David Hendricks dhendrix@chromium.org --- src/cpu/samsung/exynos5-common/Makefile.inc | 1 - src/cpu/samsung/exynos5-common/displayport/Kconfig | 2 - .../exynos5-common/displayport/Makefile.inc | 2 - src/cpu/samsung/exynos5-common/displayport/chip.h | 40 ---- .../exynos5-common/displayport/displayport.c | 107 ----------- src/cpu/samsung/exynos5-common/exynos-fb.c | 7 +- src/cpu/samsung/exynos5-common/i2c.c | 10 +- src/cpu/samsung/exynos5-common/s5p-dp-core.h | 1 + src/cpu/samsung/exynos5250/Kconfig | 2 +- src/cpu/samsung/exynos5250/chip.h | 40 ++++ src/cpu/samsung/exynos5250/cpu.c | 81 +++++++- src/mainboard/google/snow/devicetree.cb | 37 ++-- src/mainboard/google/snow/ramstage.c | 203 ++++++++++++++++++++- 13 files changed, 339 insertions(+), 194 deletions(-)
diff --git a/src/cpu/samsung/exynos5-common/Makefile.inc b/src/cpu/samsung/exynos5-common/Makefile.inc index 7abd75c..eb08fb6 100644 --- a/src/cpu/samsung/exynos5-common/Makefile.inc +++ b/src/cpu/samsung/exynos5-common/Makefile.inc @@ -22,4 +22,3 @@ ramstage-y += i2c.c ramstage-y += s5p-dp-reg.c ramstage-y += exynos-fb.c
-subdirs-y += displayport diff --git a/src/cpu/samsung/exynos5-common/displayport/Kconfig b/src/cpu/samsung/exynos5-common/displayport/Kconfig deleted file mode 100644 index 26d1422..0000000 --- a/src/cpu/samsung/exynos5-common/displayport/Kconfig +++ /dev/null @@ -1,2 +0,0 @@ -config EXYNOS_DISPLAYPORT - bool diff --git a/src/cpu/samsung/exynos5-common/displayport/Makefile.inc b/src/cpu/samsung/exynos5-common/displayport/Makefile.inc deleted file mode 100644 index 7c52eaf..0000000 --- a/src/cpu/samsung/exynos5-common/displayport/Makefile.inc +++ /dev/null @@ -1,2 +0,0 @@ -ramstage-$(CONFIG_EXYNOS_DISPLAYPORT) += displayport.c - diff --git a/src/cpu/samsung/exynos5-common/displayport/chip.h b/src/cpu/samsung/exynos5-common/displayport/chip.h deleted file mode 100644 index 53b7836..0000000 --- a/src/cpu/samsung/exynos5-common/displayport/chip.h +++ /dev/null @@ -1,40 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright 2013 Google Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef CPU_SAMSUNG_EXYNOS5_COMMON_DISPLAYPORT_H -#define CPU_SAMSUNG_EXYNOS5_COMMON_DISPLAYPORT_H - -struct cpu_samsung_exynos5_common_displayport_config { - /* special magic numbers! */ - int clkval_f; - int upper_margin; - int lower_margin; - int vsync; - int left_margin; - int right_margin; - int hsync; - - int xres; - int yres; - int bpp; - - u32 lcdbase; -}; - -#endif /* CPU_SAMSUNG_EXYNOS5-COMMON_DISPLAYPORT_H */ diff --git a/src/cpu/samsung/exynos5-common/displayport/displayport.c b/src/cpu/samsung/exynos5-common/displayport/displayport.c deleted file mode 100644 index 1c08bc7..0000000 --- a/src/cpu/samsung/exynos5-common/displayport/displayport.c +++ /dev/null @@ -1,107 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright 2013 Google Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <stdlib.h> -#include <string.h> -#include <delay.h> -#include <arch/io.h> -#include <device/device.h> - -/* we distinguish a display port device from a raw graphics device because there are - * dramatic differences in startup depending on graphics usage. To make startup fast - * and easier to understand and debug we explicitly name this common case. The alternate - * approach, involving lots of machine and callbacks, is hard to debug and verify. - */ -static void exynos_displayport_init(void) -{ - struct cpu_samsung_exynos5_common_displayport_config *conf = dev->chip_info; - /* put these on the stack. If, at some point, we want to move this code to a - * pre-ram stage, it will be much easier. - */ - vidinfo_t vi; - struct exynos5_fimd_panel panel; - void *lcdbase; - - memset(vi, 0, sizeof(vi)); - memset(panel, 0, sizeof(panel)); - - panel.is_dp = 1; /* Display I/F is eDP */ - /* while it is true that we did a memset to zero, - * we leave some 'set to zero' entries here to make - * it clear what's going on. Graphics is confusing. - */ - panel.is_mipi = 0; - panel.fixvclk = 0; - panel.ivclk = 0; - panel.clkval_f = conf->clkval_f; - panel.upper_margin = conf->upper_margin; - panel.lower_margin = conf->lower_margin; - panel.vsync = conf->vsync; - panel.left_margin = conf->left_margin; - panel.right_margin = conf->right_margin; - panel.hsync = conf->hsync; - - vi->vl_col = conf->xres; - vi->fl_row = conf->yres; - vi->vl_bpix = conf->bpp; - vi->cmap = cbmem_reserve(64*1024); /* The size is a magic number from hardware. */ - - lcdbase = conf->lcdbase; - printk(BIOS_DEBUG, "Initializing exynos VGA\n"); - ret = lcd_ctrl_init(&vi, &panel, lcdbase); -#if 0 - ret = board_dp_lcd_vdd(blob, &wait_ms); - ret = board_dp_bridge_setup(blob, &wait_ms); - while (tries < 5) { - ret = board_dp_bridge_init(blob, &wait_ms); - ret = board_dp_hotplug(blob, &wait_ms); - if (ret) { - ret = board_dp_bridge_reset(blob, &wait_ms); - continue; - } - ret = dp_controller_init(blob, &wait_ms); - ret = board_dp_backlight_vdd(blob, &wait_ms); - ret = board_dp_backlight_pwm(blob, &wait_ms); - ret = board_dp_backlight_en(blob, &wait_ms); - } -#endif -} - -static void exynos_displayport_noop(device_t dummy) -{ -} - -static struct device_operations exynos_displayport_operations = { - .read_resources = exynos_displayport_noop, - .set_resources = exynos_displayport_noop, - .enable_resources = exynos_displayport_noop, - .init = exynos_displayport_init, - .scan_bus = exynos_displayport_noop, -}; - -static void exynos_displayport_enable(struct device *dev) -{ - if (dev->link_list != NULL) - dev->ops = &exynos_displayport_operations; -} - -struct chip_operations drivers_i2c_exynos_displayport_ops = { - CHIP_NAME("exynos displayport") - .enable_dev = exynos_displayport_enable; -}; diff --git a/src/cpu/samsung/exynos5-common/exynos-fb.c b/src/cpu/samsung/exynos5-common/exynos-fb.c index 30d0767..d8cd99b 100644 --- a/src/cpu/samsung/exynos5-common/exynos-fb.c +++ b/src/cpu/samsung/exynos5-common/exynos-fb.c @@ -100,7 +100,7 @@ static void fimd_bypass(void) { struct exynos5_sysreg *sysreg = samsung_get_base_sysreg();
- /*setbits_le32(&sysreg->disp1blk_cfg, FIMDBYPASS_DISP1);*/ + setbits_le32(&sysreg->disp1blk_cfg, FIMDBYPASS_DISP1); sysreg->disp1blk_cfg &= ~FIMDBYPASS_DISP1; }
@@ -582,11 +582,10 @@ int lcd_ctrl_init(vidinfo_t *panel_info, struct exynos5_fimd_panel *panel_data, { int ret = 0;
- //vi->res = panel_info->vl_col; - //vi->yres = panel_info->vl_row; - fimd_bypass(); + printk(BIOS_SPEW, "fimd_bypass\n"); fb_init(panel_info, lcdbase, panel_data); + printk(BIOS_SPEW, "fb_init(%p, %p, %p\n",panel_info, lcdbase, panel_data);
/* Enable flushing after LCD writes if requested */ // forget it. lcd_set_flush_dcache(1); diff --git a/src/cpu/samsung/exynos5-common/i2c.c b/src/cpu/samsung/exynos5-common/i2c.c index 7384b50..e09496d 100644 --- a/src/cpu/samsung/exynos5-common/i2c.c +++ b/src/cpu/samsung/exynos5-common/i2c.c @@ -93,6 +93,7 @@ void i2c_set_early_reg(unsigned int base) g_early_i2c_config = (struct s3c24x0_i2c *)base; }
+#include <console/console.h> static struct s3c24x0_i2c_bus *get_bus(int bus_idx) { /* If an early i2c config exists we just use that */ @@ -105,7 +106,7 @@ static struct s3c24x0_i2c_bus *get_bus(int bus_idx)
if (bus_idx < i2c_busses) return &i2c_bus[bus_idx]; - debug("Undefined bus: %d\n", bus_idx); + printk(BIOS_ERR, "Undefined bus: %d, busses: %d\n", bus_idx, i2c_busses); return NULL; }
@@ -233,6 +234,7 @@ int i2c_set_bus_num(unsigned int bus) struct s3c24x0_i2c_bus *i2c;
i2c = get_bus(bus); + printk(BIOS_DEBUG, "%s: bus: %u, i2c: %p\n", __func__, bus, i2c); if (!i2c) return -1; g_current_bus = bus; @@ -522,17 +524,21 @@ int i2c_probe(unsigned char chip) return ret != I2C_OK; }
+#include <console/console.h> /* FIXME: remove this */ int i2c_read(unsigned char chip, unsigned int addr, int alen, unsigned char *buffer, int len) { struct s3c24x0_i2c_bus *i2c; unsigned char xaddr[4]; int ret;
+ printk(BIOS_DEBUG, "%s: entered, chip: 0x%02x, addr: 0x%02x\n", + __func__, chip, addr); if (alen > 4) { debug("I2C read: addr len %d not supported\n", alen); return 1; }
+ printk(BIOS_DEBUG, "%s: checkpoint 1\n", __func__); if (alen > 0) { xaddr[0] = (addr >> 24) & 0xFF; xaddr[1] = (addr >> 16) & 0xFF; @@ -559,8 +565,10 @@ int i2c_read(unsigned char chip, unsigned int addr, int alen, unsigned char *buf i2c = get_bus(g_current_bus); if (!i2c) return -1; + printk(BIOS_DEBUG, "%s: checkpoint 2\n", __func__); ret = i2c_transfer(i2c->regs, I2C_READ, chip << 1, &xaddr[4 - alen], alen, buffer, len); + printk(BIOS_DEBUG, "%s: bus: %u, ret %d\n", __func__, i2c->bus_num, ret); if (ret) { debug("I2c read: failed %d\n", ret); return 1; diff --git a/src/cpu/samsung/exynos5-common/s5p-dp-core.h b/src/cpu/samsung/exynos5-common/s5p-dp-core.h index 67c1990..2988d5d 100644 --- a/src/cpu/samsung/exynos5-common/s5p-dp-core.h +++ b/src/cpu/samsung/exynos5-common/s5p-dp-core.h @@ -250,6 +250,7 @@ void s5p_dp_config_video_slave_mode(struct s5p_dp_device *dp, void s5p_dp_wait_hw_link_training_done(struct s5p_dp_device *dp);
/* startup and init */ +struct exynos5_fimd_panel; void fb_init(vidinfo_t *panel_info, void *lcdbase, struct exynos5_fimd_panel *pd); int dp_controller_init(struct s5p_dp_device *dp_device, unsigned *wait_ms); int lcd_ctrl_init(vidinfo_t *panel_info, struct exynos5_fimd_panel *panel_data, void *lcdbase); diff --git a/src/cpu/samsung/exynos5250/Kconfig b/src/cpu/samsung/exynos5250/Kconfig index ca306b6..cc67abd 100644 --- a/src/cpu/samsung/exynos5250/Kconfig +++ b/src/cpu/samsung/exynos5250/Kconfig @@ -96,4 +96,4 @@ config SYS_TEXT_BASE
config COREBOOT_TABLES_SIZE hex - default 0x100000 + default 0x4000000 diff --git a/src/cpu/samsung/exynos5250/chip.h b/src/cpu/samsung/exynos5250/chip.h new file mode 100644 index 0000000..798cd26 --- /dev/null +++ b/src/cpu/samsung/exynos5250/chip.h @@ -0,0 +1,40 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2013 Google Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef CPU_SAMSUNG_EXYNOS5250_H +#define CPU_SAMSUNG_EXYNOS5250_H + +struct cpu_samsung_exynos5250_config { + /* special magic numbers! */ + int clkval_f; + int upper_margin; + int lower_margin; + int vsync; + int left_margin; + int right_margin; + int hsync; + + int xres; + int yres; + int bpp; + + u32 lcdbase; +}; + +#endif /* CPU_SAMSUNG_EXYNOS5250_H */ diff --git a/src/cpu/samsung/exynos5250/cpu.c b/src/cpu/samsung/exynos5250/cpu.c index 4bb06e8..0a85322 100644 --- a/src/cpu/samsung/exynos5250/cpu.c +++ b/src/cpu/samsung/exynos5250/cpu.c @@ -1,13 +1,77 @@ +#include <stdlib.h> +#include <string.h> +#include <stddef.h> +#include <delay.h> #include <console/console.h> #include <device/device.h> -#include <arch/cache.h> -#include <cpu/samsung/exynos5250/cpu.h> +#include <cbmem.h> +#include <cpu/samsung/exynos5250/fimd.h> +#include <cpu/samsung/exynos5-common/s5p-dp-core.h> +#include "chip.h" +#include "cpu.h"
#define RAM_BASE_KB (CONFIG_SYS_SDRAM_BASE >> 10) #define RAM_SIZE_KB (CONFIG_DRAM_SIZE_MB << 10UL)
+/* we distinguish a display port device from a raw graphics device because there are + * dramatic differences in startup depending on graphics usage. To make startup fast + * and easier to understand and debug we explicitly name this common case. The alternate + * approach, involving lots of machine and callbacks, is hard to debug and verify. + */ +static void exynos_displayport_init(device_t dev) +{ + int ret; + struct cpu_samsung_exynos5250_config *conf = dev->chip_info; + /* put these on the stack. If, at some point, we want to move this code to a + * pre-ram stage, it will be much easier. + */ + vidinfo_t vi; + struct exynos5_fimd_panel panel; + unsigned long int fb_size; + u32 lcdbase; + + printk(BIOS_SPEW, "%s: dev 0x%p, conf 0x%p\n", __func__, dev, conf); + memset(&vi, 0, sizeof(vi)); + memset(&panel, 0, sizeof(panel)); + + panel.is_dp = 1; /* Display I/F is eDP */ + /* while it is true that we did a memset to zero, + * we leave some 'set to zero' entries here to make + * it clear what's going on. Graphics is confusing. + */ + panel.is_mipi = 0; + panel.fixvclk = 0; + panel.ivclk = 0; + panel.clkval_f = conf->clkval_f; + panel.upper_margin = conf->upper_margin; + panel.lower_margin = conf->lower_margin; + panel.vsync = conf->vsync; + panel.left_margin = conf->left_margin; + panel.right_margin = conf->right_margin; + panel.hsync = conf->hsync; + + vi.vl_col = conf->xres; + vi.vl_row = conf->yres; + vi.vl_bpix = conf->bpp; + /* + * The size is a magic number from hardware. Allocate enough for the + * frame buffer and color map. + */ + fb_size = conf->xres * conf->yres * sizeof(unsigned long); + lcdbase = (uintptr_t)cbmem_add(CBMEM_ID_CONSOLE, fb_size + 64*KiB); + printk(BIOS_SPEW, "lcd colormap base is %p\n", (void *)(lcdbase)); + mmio_resource(dev, 0, lcdbase/KiB, 64); + vi.cmap = (void *)lcdbase; + + lcdbase += 64*KiB; + mmio_resource(dev, 1, lcdbase/KiB, fb_size + (KiB-1)/KiB); + printk(BIOS_DEBUG, "Initializing exynos VGA, base %p\n",(void *)lcdbase); + ret = lcd_ctrl_init(&vi, &panel, (void *)lcdbase); +} + static void cpu_init(device_t dev) { + exynos_displayport_init(dev); ram_resource(dev, 0, RAM_BASE_KB, RAM_SIZE_KB); }
@@ -18,22 +82,19 @@ static void cpu_noop(device_t dev) static struct device_operations cpu_ops = { .read_resources = cpu_noop, .set_resources = cpu_noop, - .enable_resources = cpu_noop, - .init = cpu_init, + .enable_resources = cpu_init, + .init = cpu_noop, .scan_bus = 0, };
-static void enable_dev(device_t dev) +static void enable_exynos5250_dev(device_t dev) { - /* Set the operations if it is a special bus type */ - if (dev->path.type == DEVICE_PATH_CPU_CLUSTER) { - dev->ops = &cpu_ops; - } + dev->ops = &cpu_ops; }
struct chip_operations cpu_samsung_exynos5250_ops = { CHIP_NAME("CPU Samsung Exynos 5250") - .enable_dev = enable_dev, + .enable_dev = enable_exynos5250_dev, };
void exynos5250_config_l2_cache(void) diff --git a/src/mainboard/google/snow/devicetree.cb b/src/mainboard/google/snow/devicetree.cb index 5ad786e..41ed45e 100644 --- a/src/mainboard/google/snow/devicetree.cb +++ b/src/mainboard/google/snow/devicetree.cb @@ -17,30 +17,17 @@ ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ##
-# FIXME: this is just a stub for now chip cpu/samsung/exynos5250 - -device cpu_cluster 0 on -end - -device domain 0 on - chip drivers/generic/generic # I2C0 controller - device i2c 6 on end # ? - device i2c 9 on end # ? - end - chip cpu/samsung/exynos5-common/displayport - register "xres" = "1366" - register "yres" = "768" - register "bpp" = "16" - # complex magic timing! - register "clkval_f" = "2" - register "upper_margin" = "14" - register "lower_margin" = "3" - register "vsync" = "5" - register "left_margin" = "80" - register "right_margin" = "48" - register "hsync" = "32" - register "lcdbase" = "0x10000000" - end -end + device cpu_cluster 0 on end + register "xres" = "1366" + register "yres" = "768" + register "bpp" = "16" + # complex magic timing! + register "clkval_f" = "2" + register "upper_margin" = "14" + register "lower_margin" = "3" + register "vsync" = "5" + register "left_margin" = "80" + register "right_margin" = "48" + register "hsync" = "32" end diff --git a/src/mainboard/google/snow/ramstage.c b/src/mainboard/google/snow/ramstage.c index 9081629..0618a86 100644 --- a/src/mainboard/google/snow/ramstage.c +++ b/src/mainboard/google/snow/ramstage.c @@ -18,13 +18,20 @@ */
#include <console/console.h> +#include <device/device.h> +#include <device/i2c.h> /* FIXME: for backlight FET enable */ #include <cbmem.h> +#include <delay.h> +#include <arch/cache.h> #include <arch/exception.h> +#include <arch/gpio.h> #include <cpu/samsung/exynos5250/clk.h> #include <cpu/samsung/exynos5250/cpu.h> +#include <cpu/samsung/exynos5250/gpio.h> #include <cpu/samsung/exynos5250/power.h>
-#include <arch/cache.h> +#include <cpu/samsung/exynos5-common/s5p-dp-core.h> +
/* convenient shorthand (in MB) */ #define DRAM_START (CONFIG_SYS_SDRAM_BASE >> 20) @@ -68,3 +75,197 @@ void main(void)
hardwaremain(0); } + +/* TODO: transplanted DP stuff, clean up once we have something that works */ +static enum exynos5_gpio_pin dp_pd_l = GPIO_Y25; /* active low */ +static enum exynos5_gpio_pin dp_rst_l = GPIO_X15; /* active low */ +static enum exynos5_gpio_pin dp_hpd = GPIO_X07; /* active high */ + +static void exynos_dp_bridge_setup(void) +{ +#if 0 + if (fdt_gpio_isvalid(&local.dp_rst)) { + fdtdec_set_gpio(&local.dp_rst, 1); + gpio_cfg_pin(local.dp_rst.gpio, EXYNOS_GPIO_OUTPUT); + gpio_set_pull(local.dp_rst.gpio, EXYNOS_GPIO_PULL_NONE); + udelay(10); + fdtdec_set_gpio(&local.dp_rst, 0); + } +#endif + exynos_pinmux_config(PERIPH_ID_DPHPD, 0); + + gpio_set_value(dp_pd_l, 1); + gpio_cfg_pin(dp_pd_l, EXYNOS_GPIO_OUTPUT); + gpio_set_pull(dp_pd_l, EXYNOS_GPIO_PULL_NONE); + + gpio_set_value(dp_rst_l, 0); + gpio_cfg_pin(dp_rst_l, EXYNOS_GPIO_OUTPUT); + gpio_set_pull(dp_rst_l, EXYNOS_GPIO_PULL_NONE); + udelay(10); + gpio_set_value(dp_rst_l, 1); + + udelay(90000); /* FIXME: this might be unnecessary */ +} + +static void exynos_dp_bridge_init(void) +{ + /* De-assert PD (and possibly RST) to power up the bridge */ + gpio_set_value(dp_pd_l, 1); + gpio_set_value(dp_rst_l, 1); + + /* + * We need to wait for 90ms after bringing up the bridge since there + * is a phantom "high" on the HPD chip during its bootup. The phantom + * high comes within 7ms of de-asserting PD and persists for at least + * 15ms. The real high comes roughly 50ms after PD is de-asserted. The + * phantom high makes it hard for us to know when the NXP chip is up. + */ + udelay(90000); /* FIXME: this might be unnecessary */ +} + +static int exynos_dp_hotplug(void) +{ + /* Check HPD. If it's high, we're all good. */ + if (gpio_get_value(dp_hpd)) + return 0; + return -1; +} + +static void exynos_dp_reset(void) +{ + gpio_set_value(dp_pd_l, 0); + gpio_set_value(dp_rst_l, 0); + /* paranoid delay period (300ms) */ + udelay(300 * 1000); +} + +#define LCD_T5_DELAY_MS 10 +#define LCD_T6_DELAY_MS 10 + +static void snow_backlight_pwm(void) +{ + /*Configure backlight PWM as a simple output high (100% brightness) */ + gpio_direction_output(GPIO_B20, 1); + udelay(LCD_T6_DELAY_MS * 1000); +} + +static void snow_backlight_en(void) +{ + /* * Configure GPIO for LCD_BL_EN */ + gpio_direction_output(GPIO_X30, 1); +} + +#define TPS69050_BUS 4 /* Snow-specific */ + +#define TPS69050_ADDR 0x48 +#define FET1_CTRL 0x0f +#define FET6_CTRL 0x14 + +static void snow_lcd_vdd(void) +{ + uint8_t val = 0xbb; + printk(BIOS_DEBUG, "%s: attempting to enable FET6\n", __func__); + i2c_set_bus_num(TPS69050_BUS); + i2c_read(TPS69050_ADDR, FET6_CTRL, 1, &val, sizeof(val)); + printk(BIOS_DEBUG, "%s: FET6_CTRL before: 0x%02x\n", __func__, val); + val |= 1; + i2c_write(TPS69050_ADDR, FET6_CTRL, 1, &val, sizeof(val)); + + i2c_read(TPS69050_ADDR, FET6_CTRL, 1, &val, sizeof(val)); + printk(BIOS_DEBUG, "%s: FET6_CTRL after: 0x%02x\n", __func__, val); +// return board_ldo_enable(6); /* Enable FET6, lcd panel */ +} + +static void snow_backlight_vdd(void) +{ + uint8_t val = 0xbb; +// return board_ldo_enable(1); /* Enable FET1, backlight */ + /* FIXME: implement more paranoid tps65090EXYNOS5250_DP1_ADDR fet routine */ +// ret = tps65090_fet_enable(1); + printk(BIOS_DEBUG, "%s: attempting to enable FET1\n", __func__); + i2c_set_bus_num(TPS69050_BUS); + i2c_read(TPS69050_ADDR, FET1_CTRL, 1, &val, sizeof(val)); + printk(BIOS_DEBUG, "%s: FET1_CTRL before: 0x%02x\n", __func__, val); + val |= 1; + i2c_write(TPS69050_ADDR, FET1_CTRL, 1, &val, sizeof(val)); + udelay(LCD_T5_DELAY_MS * 1000); + + i2c_read(TPS69050_ADDR, FET1_CTRL, 1, &val, sizeof(val)); + printk(BIOS_DEBUG, "%s: FET1_CTRL after: 0x%02x\n", __func__, val); +} + +//static struct video_info smdk5250_dp_config = { +static struct video_info snow_dp_video_info = { + /* FIXME: fix video_info struct to use const for name */ + .name = (char *)"eDP-LVDS NXP PTN3460", + + .h_sync_polarity = 0, + .v_sync_polarity = 0, + .interlaced = 0, + + .color_space = COLOR_RGB, + .dynamic_range = VESA, + .ycbcr_coeff = COLOR_YCBCR601, + .color_depth = COLOR_8, + + .link_rate = LINK_RATE_2_70GBPS, + .lane_count = LANE_COUNT2, +}; + +/* FIXME: move some place more appropriate */ +#define EXYNOS5250_DP1_BASE 0x145b0000 +#define SNOW_MAX_DP_TRIES 5 + +static void mainboard_init(device_t dev) +{ + int dp_tries; + unsigned int wait_ms; + struct s5p_dp_device dp_device = { + .base = (struct exynos5_dp *)EXYNOS5250_DP1_BASE, + .video_info = &snow_dp_video_info, + }; + + /* this happens after cpu_init where exynos resources are set */ + /* Set the i2c register address base so i2c works before FDT */ + + /* FIXME: fix the braindead i2c crap leftover from u-boot */ + i2c_set_early_reg(0x12ca0000); + i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + + snow_lcd_vdd(); + exynos_dp_bridge_setup(); + for (dp_tries = 1; dp_tries <= SNOW_MAX_DP_TRIES; dp_tries++) { + if (wait_ms) { + udelay(wait_ms); + wait_ms = 0; + } + + exynos_dp_bridge_init(); + if (exynos_dp_hotplug()) { + exynos_dp_reset(); + continue; + } + + if (dp_controller_init(&dp_device, &wait_ms)) + continue; + + snow_backlight_vdd(); + snow_backlight_pwm(); + snow_backlight_en(); + /* if we're here, we're successful */ + break; + } + + if (dp_tries > SNOW_MAX_DP_TRIES) + printk(BIOS_ERR, "%s: Failed to set up displayport\n", __func__); +} + +static void mainboard_enable(device_t dev) +{ + dev->ops->init = &mainboard_init; +} + +struct chip_operations mainboard_ops = { + .name = "Samsung/Google ARM Chromebook", + .enable_dev = mainboard_enable, +};