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/*
* Copyright (c) 2016-2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <string.h>
#include <lib/bl_aux_params/bl_aux_params.h>
#include <common/bl_common.h>
#include <common/debug.h>
#include <drivers/console.h>
#include <drivers/gpio.h>
#include <libfdt.h>
#include <lib/coreboot.h>
#include <lib/mmio.h>
#include <plat/common/platform.h>
#include <plat_params.h>
#include <plat_private.h>
static struct bl_aux_gpio_info rst_gpio = { .index = UINT_MAX } ;
static struct bl_aux_gpio_info poweroff_gpio = { .index = UINT_MAX };
static struct bl_aux_gpio_info suspend_gpio[10];
uint32_t suspend_gpio_cnt;
static struct bl_aux_rk_apio_info suspend_apio;
#if COREBOOT
static int dt_process_fdt(u_register_t param_from_bl2)
{
return -ENODEV;
}
#else
static uint32_t rk_uart_base = PLAT_RK_UART_BASE;
static uint32_t rk_uart_baudrate = PLAT_RK_UART_BAUDRATE;
static uint32_t rk_uart_clock = PLAT_RK_UART_CLOCK;
#define FDT_BUFFER_SIZE 0x20000
static uint64_t fdt_buffer[FDT_BUFFER_SIZE / 8];
void *plat_get_fdt(void)
{
return &fdt_buffer[0];
}
static void plat_rockchip_dt_process_fdt_uart(void *fdt)
{
const char *path_name = "/chosen";
const char *prop_name = "stdout-path";
int node_offset;
int stdout_path_len;
const char *stdout_path;
const char *separator;
const char *baud_start;
char serial_char;
int serial_no;
uint32_t uart_base;
uint32_t baud;
node_offset = fdt_path_offset(fdt, path_name);
if (node_offset < 0)
return;
stdout_path = fdt_getprop(fdt, node_offset, prop_name,
&stdout_path_len);
if (stdout_path == NULL)
return;
/*
* We expect something like:
* "serial0:baudrate"
*/
if (strncmp("serial", stdout_path, 6) != 0)
return;
serial_char = stdout_path[6];
serial_no = serial_char - '0';
switch (serial_no) {
case 0:
uart_base = UART0_BASE;
break;
case 1:
uart_base = UART1_BASE;
break;
case 2:
uart_base = UART2_BASE;
break;
#ifdef UART3_BASE
case 3:
uart_base = UART3_BASE;
break;
#endif
#ifdef UART4_BASE
case 4:
uart_base = UART4_BASE;
break;
#endif
#ifdef UART5_BASE
case 5:
uart_base = UART5_BASE;
break;
#endif
default:
return;
}
rk_uart_base = uart_base;
separator = strchr(stdout_path, ':');
if (!separator)
return;
baud = 0;
baud_start = separator + 1;
while (*baud_start != '\0') {
/*
* uart binding is <baud>{<parity>{<bits>{...}}}
* So the baudrate either is the whole string, or
* we end in the parity characters.
*/
if (*baud_start == 'n' || *baud_start == 'o' ||
*baud_start == 'e')
break;
baud = baud * 10 + (*baud_start - '0');
baud_start++;
}
rk_uart_baudrate = baud;
}
static int dt_process_fdt(u_register_t param_from_bl2)
{
void *fdt = plat_get_fdt();
int ret;
ret = fdt_open_into((void *)param_from_bl2, fdt, FDT_BUFFER_SIZE);
if (ret < 0)
return ret;
plat_rockchip_dt_process_fdt_uart(fdt);
return 0;
}
#endif
uint32_t rockchip_get_uart_base(void)
{
#if COREBOOT
return coreboot_serial.baseaddr;
#else
return rk_uart_base;
#endif
}
uint32_t rockchip_get_uart_baudrate(void)
{
#if COREBOOT
return coreboot_serial.baud;
#else
return rk_uart_baudrate;
#endif
}
uint32_t rockchip_get_uart_clock(void)
{
#if COREBOOT
return coreboot_serial.input_hertz;
#else
return rk_uart_clock;
#endif
}
struct bl_aux_gpio_info *plat_get_rockchip_gpio_reset(void)
{
if (rst_gpio.index == UINT_MAX)
return NULL;
return &rst_gpio;
}
struct bl_aux_gpio_info *plat_get_rockchip_gpio_poweroff(void)
{
if (poweroff_gpio.index == UINT_MAX)
return NULL;
return &poweroff_gpio;
}
struct bl_aux_gpio_info *plat_get_rockchip_suspend_gpio(uint32_t *count)
{
*count = suspend_gpio_cnt;
return &suspend_gpio[0];
}
struct bl_aux_rk_apio_info *plat_get_rockchip_suspend_apio(void)
{
return &suspend_apio;
}
static bool rk_aux_param_handler(struct bl_aux_param_header *param)
{
/* Store platform parameters for later processing if needed. */
switch (param->type) {
case BL_AUX_PARAM_RK_RESET_GPIO:
rst_gpio = ((struct bl_aux_param_gpio *)param)->gpio;
return true;
case BL_AUX_PARAM_RK_POWEROFF_GPIO:
poweroff_gpio = ((struct bl_aux_param_gpio *)param)->gpio;
return true;
case BL_AUX_PARAM_RK_SUSPEND_GPIO:
if (suspend_gpio_cnt >= ARRAY_SIZE(suspend_gpio)) {
ERROR("Exceeded the supported suspend GPIO number.\n");
return true;
}
suspend_gpio[suspend_gpio_cnt++] =
((struct bl_aux_param_gpio *)param)->gpio;
return true;
case BL_AUX_PARAM_RK_SUSPEND_APIO:
suspend_apio = ((struct bl_aux_param_rk_apio *)param)->apio;
return true;
}
return false;
}
void params_early_setup(u_register_t plat_param_from_bl2)
{
int ret;
/*
* Test if this is a FDT passed as a platform-specific parameter
* block.
*/
ret = dt_process_fdt(plat_param_from_bl2);
if (!ret) {
return;
} else if (ret != -FDT_ERR_BADMAGIC) {
/*
* If we found an FDT but couldn't parse it (e.g. corrupt, not
* enough space), return and don't attempt to parse the param
* as something else, since we know that will also fail. All
* we're doing is setting up UART, this doesn't need to be
* fatal.
*/
WARN("%s: found FDT but could not parse: error %d\n",
__func__, ret);
return;
}
bl_aux_params_parse(plat_param_from_bl2, rk_aux_param_handler);
}
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