diff options
Diffstat (limited to 'roms/u-boot/board/qualcomm/dragonboard820c/dragonboard820c.c')
| -rw-r--r-- | roms/u-boot/board/qualcomm/dragonboard820c/dragonboard820c.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/roms/u-boot/board/qualcomm/dragonboard820c/dragonboard820c.c b/roms/u-boot/board/qualcomm/dragonboard820c/dragonboard820c.c new file mode 100644 index 000000000..4ccb1a075 --- /dev/null +++ b/roms/u-boot/board/qualcomm/dragonboard820c/dragonboard820c.c @@ -0,0 +1,167 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Board init file for Dragonboard 820C + * + * (C) Copyright 2017 Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org> + */ + +#include <cpu_func.h> +#include <init.h> +#include <asm/arch/sysmap-apq8096.h> +#include <env.h> +#include <asm/cache.h> +#include <asm/global_data.h> +#include <linux/arm-smccc.h> +#include <linux/psci.h> +#include <common.h> +#include <dm.h> +#include <asm/io.h> +#include <linux/bitops.h> +#include <asm/psci.h> +#include <asm/gpio.h> + +DECLARE_GLOBAL_DATA_PTR; + +int dram_init(void) +{ + gd->ram_size = PHYS_SDRAM_SIZE; + + return 0; +} + +int dram_init_banksize(void) +{ + gd->bd->bi_dram[0].start = PHYS_SDRAM_1; + gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE; + + gd->bd->bi_dram[1].start = PHYS_SDRAM_2; + gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE; + + return 0; +} + +static void sdhci_power_init(void) +{ + const u32 TLMM_PULL_MASK = 0x3; + const u32 TLMM_HDRV_MASK = 0x7; + + struct tlmm_cfg { + u32 bit; /* bit in the register */ + u8 mask; /* mask clk/dat/cmd control */ + u8 val; + }; + + /* bit offsets in the sdc tlmm register */ + enum { SDC1_DATA_HDRV = 0, + SDC1_CMD_HDRV = 3, + SDC1_CLK_HDRV = 6, + SDC1_DATA_PULL = 9, + SDC1_CMD_PULL = 11, + SDC1_CLK_PULL = 13, + SDC1_RCLK_PULL = 15, + }; + + enum { TLMM_PULL_DOWN = 0x1, + TLMM_PULL_UP = 0x3, + TLMM_NO_PULL = 0x0, + }; + + enum { TLMM_CUR_VAL_10MA = 0x04, + TLMM_CUR_VAL_16MA = 0x07, + }; + int i; + + /* drive strength configs for sdhc pins */ + const struct tlmm_cfg hdrv[] = { + + { SDC1_CLK_HDRV, TLMM_CUR_VAL_16MA, TLMM_HDRV_MASK, }, + { SDC1_CMD_HDRV, TLMM_CUR_VAL_10MA, TLMM_HDRV_MASK, }, + { SDC1_DATA_HDRV, TLMM_CUR_VAL_10MA, TLMM_HDRV_MASK, }, + }; + + /* pull configs for sdhc pins */ + const struct tlmm_cfg pull[] = { + + { SDC1_CLK_PULL, TLMM_NO_PULL, TLMM_PULL_MASK, }, + { SDC1_CMD_PULL, TLMM_PULL_UP, TLMM_PULL_MASK, }, + { SDC1_DATA_PULL, TLMM_PULL_UP, TLMM_PULL_MASK, }, + }; + + const struct tlmm_cfg rclk[] = { + + { SDC1_RCLK_PULL, TLMM_PULL_DOWN, TLMM_PULL_MASK,}, + }; + + for (i = 0; i < ARRAY_SIZE(hdrv); i++) + clrsetbits_le32(SDC1_HDRV_PULL_CTL_REG, + hdrv[i].mask << hdrv[i].bit, + hdrv[i].val << hdrv[i].bit); + + for (i = 0; i < ARRAY_SIZE(pull); i++) + clrsetbits_le32(SDC1_HDRV_PULL_CTL_REG, + pull[i].mask << pull[i].bit, + pull[i].val << pull[i].bit); + + for (i = 0; i < ARRAY_SIZE(rclk); i++) + clrsetbits_le32(SDC1_HDRV_PULL_CTL_REG, + rclk[i].mask << rclk[i].bit, + rclk[i].val << rclk[i].bit); +} + +static void show_psci_version(void) +{ + struct arm_smccc_res res; + + arm_smccc_smc(ARM_PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0, 0, 0, 0, 0, &res); + + printf("PSCI: v%ld.%ld\n", + PSCI_VERSION_MAJOR(res.a0), + PSCI_VERSION_MINOR(res.a0)); +} + +int board_init(void) +{ + sdhci_power_init(); + show_psci_version(); + + return 0; +} + +void reset_cpu(void) +{ + psci_system_reset(); +} + +/* Check for vol- button - if pressed - stop autoboot */ +int misc_init_r(void) +{ + struct udevice *pon; + struct gpio_desc resin; + int node, ret; + + ret = uclass_get_device_by_name(UCLASS_GPIO, "pm8994_pon@800", &pon); + if (ret < 0) { + printf("Failed to find PMIC pon node. Check device tree\n"); + return 0; + } + + node = fdt_subnode_offset(gd->fdt_blob, dev_of_offset(pon), + "key_vol_down"); + if (node < 0) { + printf("Failed to find key_vol_down node. Check device tree\n"); + return 0; + } + + if (gpio_request_by_name_nodev(offset_to_ofnode(node), "gpios", 0, + &resin, 0)) { + printf("Failed to request key_vol_down button.\n"); + return 0; + } + + if (dm_gpio_get_value(&resin)) { + env_set("bootdelay", "-1"); + printf("Power button pressed - dropping to console.\n"); + } + + return 0; +} |