| // 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 <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> |
| |
| #define TLMM_BASE_ADDR (0x1010000) |
| |
| /* Strength (sdc1) */ |
| #define SDC1_HDRV_PULL_CTL_REG (TLMM_BASE_ADDR + 0x0012D000) |
| |
| 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; |
| } |