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// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
* Copyright (c) 2018 Microsemi Corporation
*/
#include <common.h>
#include <image.h>
#include <init.h>
#include <log.h>
#include <asm/global_data.h>
#include <asm/io.h>
#include <asm/addrspace.h>
#include <asm/types.h>
#include <spi.h>
#include <led.h>
#include <wait_bit.h>
#include <miiphy.h>
#include <linux/bitops.h>
DECLARE_GLOBAL_DATA_PTR;
enum {
BOARD_TYPE_PCB120 = 0xAABBCC00,
BOARD_TYPE_PCB123,
};
void mscc_switch_reset(bool enter)
{
/* Nasty workaround to avoid GPIO19 (DDR!) being reset */
mscc_gpio_set_alternate(19, 2);
debug("applying SwC reset\n");
writel(ICPU_RESET_CORE_RST_PROTECT, BASE_CFG + ICPU_RESET);
writel(PERF_SOFT_RST_SOFT_CHIP_RST, BASE_DEVCPU_GCB + PERF_SOFT_RST);
if (wait_for_bit_le32(BASE_DEVCPU_GCB + PERF_SOFT_RST,
PERF_SOFT_RST_SOFT_CHIP_RST, false, 5000, false))
pr_err("Tiemout while waiting for switch reset\n");
/*
* Reset GPIO19 mode back as regular GPIO, output, high (DDR
* not reset) (Order is important)
*/
setbits_le32(BASE_DEVCPU_GCB + PERF_GPIO_OE, BIT(19));
writel(BIT(19), BASE_DEVCPU_GCB + PERF_GPIO_OUT_SET);
mscc_gpio_set_alternate(19, 0);
}
int board_phy_config(struct phy_device *phydev)
{
if (gd->board_type == BOARD_TYPE_PCB123)
return 0;
phy_write(phydev, 0, 31, 0x10);
phy_write(phydev, 0, 18, 0x80F0);
while (phy_read(phydev, 0, 18) & 0x8000)
;
phy_write(phydev, 0, 31, 0);
return 0;
}
void board_debug_uart_init(void)
{
/* too early for the pinctrl driver, so configure the UART pins here */
mscc_gpio_set_alternate(6, 1);
mscc_gpio_set_alternate(7, 1);
}
int board_early_init_r(void)
{
/* Prepare SPI controller to be used in master mode */
writel(0, BASE_CFG + ICPU_SW_MODE);
clrsetbits_le32(BASE_CFG + ICPU_GENERAL_CTRL,
ICPU_GENERAL_CTRL_IF_SI_OWNER_M,
ICPU_GENERAL_CTRL_IF_SI_OWNER(2));
/* Address of boot parameters */
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE;
return 0;
}
static void do_board_detect(void)
{
u16 dummy = 0;
/* Enable MIIM */
mscc_gpio_set_alternate(14, 1);
mscc_gpio_set_alternate(15, 1);
if (mscc_phy_rd(1, 0, 0, &dummy) == 0)
gd->board_type = BOARD_TYPE_PCB120;
else
gd->board_type = BOARD_TYPE_PCB123;
}
#if defined(CONFIG_MULTI_DTB_FIT)
int board_fit_config_name_match(const char *name)
{
if (gd->board_type == BOARD_TYPE_PCB120 &&
strcmp(name, "ocelot_pcb120") == 0)
return 0;
if (gd->board_type == BOARD_TYPE_PCB123 &&
strcmp(name, "ocelot_pcb123") == 0)
return 0;
return -1;
}
#endif
#if defined(CONFIG_DTB_RESELECT)
int embedded_dtb_select(void)
{
do_board_detect();
fdtdec_setup();
return 0;
}
#endif
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