dragonboard820c.c
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// 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 <asm/arch/sysmap-apq8096.h>
#include <env.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(ulong addr)
{
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;
}