mirror of
https://github.com/AsahiLinux/u-boot
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35b65dd8ef
Historically, the reset_cpu() function had an `addr` parameter which was
meant to pass in an address of the reset vector location, where the CPU
should reset to. This feature is no longer used anywhere in U-Boot as
all reset_cpu() implementations now ignore the passed value. Generic
code has been added which always calls reset_cpu() with `0` which means
this feature can no longer be used easily anyway.
Over time, many implementations seem to have "misunderstood" the
existence of this parameter as a way to customize/parameterize the reset
(e.g. COLD vs WARM resets). As this is not properly supported, the
code will almost always not do what it is intended to (because all
call-sites just call reset_cpu() with 0).
To avoid confusion and to clean up the codebase from unused left-overs
of the past, remove the `addr` parameter entirely. Code which intends
to support different kinds of resets should be rewritten as a sysreset
driver instead.
This transformation was done with the following coccinelle patch:
@@
expression argvalue;
@@
- reset_cpu(argvalue)
+ reset_cpu()
@@
identifier argname;
type argtype;
@@
- reset_cpu(argtype argname)
+ reset_cpu(void)
{ ... }
Signed-off-by: Harald Seiler <hws@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
156 lines
3.1 KiB
C
156 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* board/renesas/porter/porter.c
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*
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* Copyright (C) 2015 Renesas Electronics Corporation
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* Copyright (C) 2015 Cogent Embedded, Inc.
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*/
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#include <common.h>
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#include <cpu_func.h>
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#include <env.h>
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#include <hang.h>
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#include <init.h>
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#include <malloc.h>
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#include <dm.h>
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#include <asm/global_data.h>
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#include <dm/platform_data/serial_sh.h>
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#include <env_internal.h>
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#include <asm/processor.h>
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#include <asm/mach-types.h>
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#include <asm/io.h>
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/gpio.h>
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#include <asm/arch/rmobile.h>
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#include <asm/arch/rcar-mstp.h>
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#include <asm/arch/sh_sdhi.h>
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#include <netdev.h>
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#include <miiphy.h>
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#include <i2c.h>
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#include <div64.h>
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#include "qos.h"
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DECLARE_GLOBAL_DATA_PTR;
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#define CLK2MHZ(clk) (clk / 1000 / 1000)
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void s_init(void)
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{
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struct rcar_rwdt *rwdt = (struct rcar_rwdt *)RWDT_BASE;
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struct rcar_swdt *swdt = (struct rcar_swdt *)SWDT_BASE;
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u32 stc;
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/* Watchdog init */
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writel(0xA5A5A500, &rwdt->rwtcsra);
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writel(0xA5A5A500, &swdt->swtcsra);
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/* CPU frequency setting. Set to 1.5GHz */
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stc = ((1500 / CLK2MHZ(CONFIG_SYS_CLK_FREQ)) - 1) << PLL0_STC_BIT;
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clrsetbits_le32(PLL0CR, PLL0_STC_MASK, stc);
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/* QoS */
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qos_init();
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}
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#define TMU0_MSTP125 BIT(25)
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#define SD2CKCR 0xE615026C
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#define SD_97500KHZ 0x7
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int board_early_init_f(void)
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{
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mstp_clrbits_le32(MSTPSR1, SMSTPCR1, TMU0_MSTP125);
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/*
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* SD0 clock is set to 97.5MHz by default.
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* Set SD2 to the 97.5MHz as well.
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*/
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writel(SD_97500KHZ, SD2CKCR);
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return 0;
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}
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#define ETHERNET_PHY_RESET 176 /* GPIO 5 22 */
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int board_init(void)
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{
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/* adress of boot parameters */
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gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
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/* Force ethernet PHY out of reset */
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gpio_request(ETHERNET_PHY_RESET, "phy_reset");
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gpio_direction_output(ETHERNET_PHY_RESET, 0);
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mdelay(10);
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gpio_direction_output(ETHERNET_PHY_RESET, 1);
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return 0;
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}
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int dram_init(void)
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{
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if (fdtdec_setup_mem_size_base() != 0)
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return -EINVAL;
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return 0;
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}
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int dram_init_banksize(void)
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{
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fdtdec_setup_memory_banksize();
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return 0;
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}
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/* porter has KSZ8041RNLI */
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#define PHY_CONTROL1 0x1E
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#define PHY_LED_MODE 0xC000
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#define PHY_LED_MODE_ACK 0x4000
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int board_phy_config(struct phy_device *phydev)
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{
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int ret = phy_read(phydev, MDIO_DEVAD_NONE, PHY_CONTROL1);
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ret &= ~PHY_LED_MODE;
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ret |= PHY_LED_MODE_ACK;
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ret = phy_write(phydev, MDIO_DEVAD_NONE, PHY_CONTROL1, (u16)ret);
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return 0;
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}
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void reset_cpu(void)
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{
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struct udevice *dev;
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const u8 pmic_bus = 6;
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const u8 pmic_addr = 0x5a;
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u8 data;
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int ret;
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ret = i2c_get_chip_for_busnum(pmic_bus, pmic_addr, 1, &dev);
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if (ret)
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hang();
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ret = dm_i2c_read(dev, 0x13, &data, 1);
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if (ret)
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hang();
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data |= BIT(1);
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ret = dm_i2c_write(dev, 0x13, &data, 1);
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if (ret)
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hang();
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}
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enum env_location env_get_location(enum env_operation op, int prio)
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{
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const u32 load_magic = 0xb33fc0de;
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/* Block environment access if loaded using JTAG */
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if ((readl(CONFIG_SPL_TEXT_BASE + 0x24) == load_magic) &&
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(op != ENVOP_INIT))
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return ENVL_UNKNOWN;
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if (prio)
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return ENVL_UNKNOWN;
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return ENVL_SPI_FLASH;
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}
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