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https://github.com/AsahiLinux/u-boot
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cecac32a06
This is done already for am335x in
59dcf970d1 and also applies for pcm051.
It powers down the IO receiver when not performing read which helps
reducing the overall power consuption in low power states
(suspend/standby).
Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
267 lines
6.5 KiB
C
267 lines
6.5 KiB
C
/*
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* board.c
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*
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* Board functions for Phytec phyCORE-AM335x (pcm051) based boards
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*
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* Copyright (C) 2013 Lemonage Software GmbH
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* Author Lars Poeschel <poeschel@lemonage.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <common.h>
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#include <errno.h>
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#include <spl.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/omap.h>
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#include <asm/arch/ddr_defs.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/gpio.h>
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#include <asm/arch/mmc_host_def.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/io.h>
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#include <asm/emif.h>
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#include <asm/gpio.h>
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#include <i2c.h>
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#include <miiphy.h>
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#include <cpsw.h>
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#include "board.h"
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DECLARE_GLOBAL_DATA_PTR;
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static struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE;
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#ifdef CONFIG_SPL_BUILD
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static struct uart_sys *uart_base = (struct uart_sys *)DEFAULT_UART_BASE;
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#endif
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/* MII mode defines */
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#define MII_MODE_ENABLE 0x0
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#define RGMII_MODE_ENABLE 0xA
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#define RMII_RGMII2_MODE_ENABLE 0x49
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static struct ctrl_dev *cdev = (struct ctrl_dev *)CTRL_DEVICE_BASE;
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/* UART defines */
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#ifdef CONFIG_SPL_BUILD
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#define UART_RESET (0x1 << 1)
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#define UART_CLK_RUNNING_MASK 0x1
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#define UART_SMART_IDLE_EN (0x1 << 0x3)
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/* DDR RAM defines */
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#define DDR_CLK_MHZ 303 /* DDR_DPLL_MULT value */
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static void rtc32k_enable(void)
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{
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struct rtc_regs *rtc = (struct rtc_regs *)RTC_BASE;
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/*
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* Unlock the RTC's registers. For more details please see the
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* RTC_SS section of the TRM. In order to unlock we need to
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* write these specific values (keys) in this order.
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*/
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writel(0x83e70b13, &rtc->kick0r);
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writel(0x95a4f1e0, &rtc->kick1r);
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/* Enable the RTC 32K OSC by setting bits 3 and 6. */
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writel((1 << 3) | (1 << 6), &rtc->osc);
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}
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static const struct ddr_data ddr3_data = {
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.datardsratio0 = MT41J256M8HX15E_RD_DQS,
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.datawdsratio0 = MT41J256M8HX15E_WR_DQS,
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.datafwsratio0 = MT41J256M8HX15E_PHY_FIFO_WE,
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.datawrsratio0 = MT41J256M8HX15E_PHY_WR_DATA,
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.datadldiff0 = PHY_DLL_LOCK_DIFF,
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};
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static const struct cmd_control ddr3_cmd_ctrl_data = {
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.cmd0csratio = MT41J256M8HX15E_RATIO,
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.cmd0dldiff = MT41J256M8HX15E_DLL_LOCK_DIFF,
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.cmd0iclkout = MT41J256M8HX15E_INVERT_CLKOUT,
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.cmd1csratio = MT41J256M8HX15E_RATIO,
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.cmd1dldiff = MT41J256M8HX15E_DLL_LOCK_DIFF,
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.cmd1iclkout = MT41J256M8HX15E_INVERT_CLKOUT,
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.cmd2csratio = MT41J256M8HX15E_RATIO,
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.cmd2dldiff = MT41J256M8HX15E_DLL_LOCK_DIFF,
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.cmd2iclkout = MT41J256M8HX15E_INVERT_CLKOUT,
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};
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static struct emif_regs ddr3_emif_reg_data = {
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.sdram_config = MT41J256M8HX15E_EMIF_SDCFG,
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.ref_ctrl = MT41J256M8HX15E_EMIF_SDREF,
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.sdram_tim1 = MT41J256M8HX15E_EMIF_TIM1,
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.sdram_tim2 = MT41J256M8HX15E_EMIF_TIM2,
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.sdram_tim3 = MT41J256M8HX15E_EMIF_TIM3,
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.zq_config = MT41J256M8HX15E_ZQ_CFG,
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.emif_ddr_phy_ctlr_1 = MT41J256M8HX15E_EMIF_READ_LATENCY |
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PHY_EN_DYN_PWRDN,
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};
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#endif
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/*
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* early system init of muxing and clocks.
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*/
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void s_init(void)
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{
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/*
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* WDT1 is already running when the bootloader gets control
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* Disable it to avoid "random" resets
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*/
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writel(0xAAAA, &wdtimer->wdtwspr);
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while (readl(&wdtimer->wdtwwps) != 0x0)
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;
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writel(0x5555, &wdtimer->wdtwspr);
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while (readl(&wdtimer->wdtwwps) != 0x0)
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;
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#ifdef CONFIG_SPL_BUILD
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/* Setup the PLLs and the clocks for the peripherals */
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pll_init();
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/* Enable RTC32K clock */
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rtc32k_enable();
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/* UART softreset */
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u32 regval;
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enable_uart0_pin_mux();
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regval = readl(&uart_base->uartsyscfg);
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regval |= UART_RESET;
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writel(regval, &uart_base->uartsyscfg);
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while ((readl(&uart_base->uartsyssts) & UART_CLK_RUNNING_MASK)
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!= UART_CLK_RUNNING_MASK)
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;
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/* Disable smart idle */
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regval = readl(&uart_base->uartsyscfg);
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regval |= UART_SMART_IDLE_EN;
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writel(regval, &uart_base->uartsyscfg);
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gd = &gdata;
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preloader_console_init();
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/* Initalize the board header */
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enable_i2c0_pin_mux();
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i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
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enable_board_pin_mux();
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config_ddr(DDR_CLK_MHZ, MT41J256M8HX15E_IOCTRL_VALUE, &ddr3_data,
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&ddr3_cmd_ctrl_data, &ddr3_emif_reg_data, 0);
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#endif
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}
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/*
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* Basic board specific setup. Pinmux has been handled already.
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*/
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int board_init(void)
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{
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i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
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gd->bd->bi_boot_params = PHYS_DRAM_1 + 0x100;
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return 0;
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}
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#ifdef CONFIG_DRIVER_TI_CPSW
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static void cpsw_control(int enabled)
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{
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/* VTP can be added here */
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return;
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}
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static struct cpsw_slave_data cpsw_slaves[] = {
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{
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.slave_reg_ofs = 0x208,
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.sliver_reg_ofs = 0xd80,
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.phy_id = 0,
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.phy_if = PHY_INTERFACE_MODE_RGMII,
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},
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{
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.slave_reg_ofs = 0x308,
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.sliver_reg_ofs = 0xdc0,
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.phy_id = 1,
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.phy_if = PHY_INTERFACE_MODE_RGMII,
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},
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};
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static struct cpsw_platform_data cpsw_data = {
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.mdio_base = CPSW_MDIO_BASE,
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.cpsw_base = CPSW_BASE,
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.mdio_div = 0xff,
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.channels = 8,
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.cpdma_reg_ofs = 0x800,
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.slaves = 1,
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.slave_data = cpsw_slaves,
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.ale_reg_ofs = 0xd00,
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.ale_entries = 1024,
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.host_port_reg_ofs = 0x108,
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.hw_stats_reg_ofs = 0x900,
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.mac_control = (1 << 5),
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.control = cpsw_control,
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.host_port_num = 0,
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.version = CPSW_CTRL_VERSION_2,
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};
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#endif
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#if defined(CONFIG_DRIVER_TI_CPSW) || \
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(defined(CONFIG_USB_ETHER) && defined(CONFIG_MUSB_GADGET))
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int board_eth_init(bd_t *bis)
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{
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int rv, n = 0;
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#ifdef CONFIG_DRIVER_TI_CPSW
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uint8_t mac_addr[6];
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uint32_t mac_hi, mac_lo;
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if (!eth_getenv_enetaddr("ethaddr", mac_addr)) {
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printf("<ethaddr> not set. Reading from E-fuse\n");
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/* try reading mac address from efuse */
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mac_lo = readl(&cdev->macid0l);
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mac_hi = readl(&cdev->macid0h);
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mac_addr[0] = mac_hi & 0xFF;
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mac_addr[1] = (mac_hi & 0xFF00) >> 8;
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mac_addr[2] = (mac_hi & 0xFF0000) >> 16;
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mac_addr[3] = (mac_hi & 0xFF000000) >> 24;
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mac_addr[4] = mac_lo & 0xFF;
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mac_addr[5] = (mac_lo & 0xFF00) >> 8;
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if (is_valid_ether_addr(mac_addr))
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eth_setenv_enetaddr("ethaddr", mac_addr);
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else
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goto try_usbether;
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}
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writel(RMII_RGMII2_MODE_ENABLE, &cdev->miisel);
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rv = cpsw_register(&cpsw_data);
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if (rv < 0)
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printf("Error %d registering CPSW switch\n", rv);
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else
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n += rv;
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try_usbether:
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#endif
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#if defined(CONFIG_USB_ETHER) && !defined(CONFIG_SPL_BUILD)
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rv = usb_eth_initialize(bis);
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if (rv < 0)
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printf("Error %d registering USB_ETHER\n", rv);
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else
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n += rv;
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#endif
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return n;
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}
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#endif
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