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u-boot/board/tqc/tqma6/tqma6_mba6.c
Fabio Estevam 36f5a7f64d tqma6_mba6: Fix the error handling in board_eth_init() 
We should not return 0 on failure, so return a negative error code
instead.

Also centralize the error path so that is easier to follow.

Cc: Markus Niebel <Markus.Niebel@tq-group.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
2015-09-13 11:05:50 +02:00

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/*
* Copyright (C) 2012 Freescale Semiconductor, Inc.
* Author: Fabio Estevam <fabio.estevam@freescale.com>
*
* Copyright (C) 2013, 2014 TQ Systems (ported SabreSD to TQMa6x)
* Author: Markus Niebel <markus.niebel@tq-group.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/mx6-pins.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/iomux.h>
#include <asm/arch/sys_proto.h>
#include <asm/errno.h>
#include <asm/gpio.h>
#include <asm/imx-common/mxc_i2c.h>
#include <common.h>
#include <fsl_esdhc.h>
#include <libfdt.h>
#include <malloc.h>
#include <i2c.h>
#include <micrel.h>
#include <miiphy.h>
#include <mmc.h>
#include <netdev.h>
#include "tqma6_bb.h"
DECLARE_GLOBAL_DATA_PTR;
#define UART_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \
PAD_CTL_DSE_80ohm | PAD_CTL_SRE_FAST | PAD_CTL_HYS)
#define USDHC_CLK_PAD_CTRL (PAD_CTL_PUS_47K_UP | PAD_CTL_SPEED_LOW | \
PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST | PAD_CTL_HYS)
#define USDHC_PAD_CTRL (PAD_CTL_PUS_47K_UP | PAD_CTL_SPEED_LOW | \
PAD_CTL_DSE_80ohm | PAD_CTL_SRE_FAST | PAD_CTL_HYS)
#define GPIO_OUT_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_LOW | \
PAD_CTL_DSE_40ohm | PAD_CTL_HYS)
#define GPIO_IN_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_LOW | \
PAD_CTL_DSE_40ohm | PAD_CTL_HYS)
#define SPI_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \
PAD_CTL_DSE_80ohm | PAD_CTL_SRE_FAST | PAD_CTL_HYS)
#define I2C_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \
PAD_CTL_DSE_40ohm | PAD_CTL_HYS | \
PAD_CTL_ODE | PAD_CTL_SRE_FAST)
#if defined(CONFIG_MX6Q)
#define IOMUX_SW_PAD_CTRL_GRP_DDR_TYPE_RGMII 0x02e0790
#define IOMUX_SW_PAD_CTRL_GRP_RGMII_TERM 0x02e07ac
#elif defined(CONFIG_MX6S)
#define IOMUX_SW_PAD_CTRL_GRP_DDR_TYPE_RGMII 0x02e0768
#define IOMUX_SW_PAD_CTRL_GRP_RGMII_TERM 0x02e0788
#else
#error "need to define target CPU"
#endif
#define ENET_RX_PAD_CTRL (PAD_CTL_DSE_34ohm)
#define ENET_TX_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_DSE_34ohm)
#define ENET_CLK_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_HIGH | \
PAD_CTL_DSE_34ohm)
#define ENET_MDIO_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \
PAD_CTL_DSE_60ohm)
/* disable on die termination for RGMII */
#define IOMUX_SW_PAD_CTRL_GRP_RGMII_TERM_DISABLE 0x00000000
/* optimised drive strength for 1.0 .. 1.3 V signal on RGMII */
#define IOMUX_SW_PAD_CTRL_GRP_DDR_TYPE_RGMII_1P2V 0x00080000
/* optimised drive strength for 1.3 .. 2.5 V signal on RGMII */
#define IOMUX_SW_PAD_CTRL_GRP_DDR_TYPE_RGMII_1P5V 0x000C0000
#define ENET_PHY_RESET_GPIO IMX_GPIO_NR(1, 25)
static iomux_v3_cfg_t const mba6_enet_pads[] = {
NEW_PAD_CTRL(MX6_PAD_ENET_MDIO__ENET_MDIO, ENET_MDIO_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_ENET_MDC__ENET_MDC, ENET_MDIO_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_RGMII_TXC__RGMII_TXC, ENET_TX_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_RGMII_TD0__RGMII_TD0, ENET_TX_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_RGMII_TD1__RGMII_TD1, ENET_TX_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_RGMII_TD2__RGMII_TD2, ENET_TX_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_RGMII_TD3__RGMII_TD3, ENET_TX_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_RGMII_TX_CTL__RGMII_TX_CTL,
ENET_TX_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_ENET_REF_CLK__ENET_TX_CLK, ENET_CLK_PAD_CTRL),
/*
* these pins are also used for config strapping by phy
*/
NEW_PAD_CTRL(MX6_PAD_RGMII_RD0__RGMII_RD0, ENET_RX_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_RGMII_RD1__RGMII_RD1, ENET_RX_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_RGMII_RD2__RGMII_RD2, ENET_RX_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_RGMII_RD3__RGMII_RD3, ENET_RX_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_RGMII_RXC__RGMII_RXC, ENET_RX_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_RGMII_RX_CTL__RGMII_RX_CTL,
ENET_RX_PAD_CTRL),
/* KSZ9031 PHY Reset */
NEW_PAD_CTRL(MX6_PAD_ENET_CRS_DV__GPIO1_IO25, GPIO_OUT_PAD_CTRL),
};
static void mba6_setup_iomuxc_enet(void)
{
__raw_writel(IOMUX_SW_PAD_CTRL_GRP_RGMII_TERM_DISABLE,
(void *)IOMUX_SW_PAD_CTRL_GRP_RGMII_TERM);
__raw_writel(IOMUX_SW_PAD_CTRL_GRP_DDR_TYPE_RGMII_1P5V,
(void *)IOMUX_SW_PAD_CTRL_GRP_DDR_TYPE_RGMII);
imx_iomux_v3_setup_multiple_pads(mba6_enet_pads,
ARRAY_SIZE(mba6_enet_pads));
/* Reset PHY */
gpio_direction_output(ENET_PHY_RESET_GPIO , 0);
/* Need delay 10ms after power on according to KSZ9031 spec */
udelay(1000 * 10);
gpio_set_value(ENET_PHY_RESET_GPIO, 1);
/*
* KSZ9031 manual: 100 usec wait time after reset before communication
* over MDIO
* BUGBUG: hardware has an RC const that needs > 10 msec from 0->1 on
* reset before the phy sees a high level
*/
udelay(200);
}
static iomux_v3_cfg_t const mba6_uart2_pads[] = {
NEW_PAD_CTRL(MX6_PAD_SD4_DAT4__UART2_RX_DATA, UART_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_SD4_DAT7__UART2_TX_DATA, UART_PAD_CTRL),
};
static void mba6_setup_iomuxc_uart(void)
{
imx_iomux_v3_setup_multiple_pads(mba6_uart2_pads,
ARRAY_SIZE(mba6_uart2_pads));
}
#define USDHC2_CD_GPIO IMX_GPIO_NR(1, 4)
#define USDHC2_WP_GPIO IMX_GPIO_NR(1, 2)
int tqma6_bb_board_mmc_getcd(struct mmc *mmc)
{
struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
int ret = 0;
if (cfg->esdhc_base == USDHC2_BASE_ADDR)
ret = !gpio_get_value(USDHC2_CD_GPIO);
return ret;
}
int tqma6_bb_board_mmc_getwp(struct mmc *mmc)
{
struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
int ret = 0;
if (cfg->esdhc_base == USDHC2_BASE_ADDR)
ret = gpio_get_value(USDHC2_WP_GPIO);
return ret;
}
static struct fsl_esdhc_cfg mba6_usdhc_cfg = {
.esdhc_base = USDHC2_BASE_ADDR,
.max_bus_width = 4,
};
static iomux_v3_cfg_t const mba6_usdhc2_pads[] = {
NEW_PAD_CTRL(MX6_PAD_SD2_CLK__SD2_CLK, USDHC_CLK_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_SD2_CMD__SD2_CMD, USDHC_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_SD2_DAT0__SD2_DATA0, USDHC_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_SD2_DAT1__SD2_DATA1, USDHC_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_SD2_DAT2__SD2_DATA2, USDHC_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_SD2_DAT3__SD2_DATA3, USDHC_PAD_CTRL),
/* CD */
NEW_PAD_CTRL(MX6_PAD_GPIO_4__GPIO1_IO04, GPIO_IN_PAD_CTRL),
/* WP */
NEW_PAD_CTRL(MX6_PAD_GPIO_2__GPIO1_IO02, GPIO_IN_PAD_CTRL),
};
int tqma6_bb_board_mmc_init(bd_t *bis)
{
imx_iomux_v3_setup_multiple_pads(mba6_usdhc2_pads,
ARRAY_SIZE(mba6_usdhc2_pads));
gpio_direction_input(USDHC2_CD_GPIO);
gpio_direction_input(USDHC2_WP_GPIO);
mba6_usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
if (fsl_esdhc_initialize(bis, &mba6_usdhc_cfg))
puts("Warning: failed to initialize SD\n");
return 0;
}
static struct i2c_pads_info mba6_i2c1_pads = {
/* I2C1: MBa6x */
.scl = {
.i2c_mode = NEW_PAD_CTRL(MX6_PAD_CSI0_DAT9__I2C1_SCL,
I2C_PAD_CTRL),
.gpio_mode = NEW_PAD_CTRL(MX6_PAD_CSI0_DAT9__GPIO5_IO27,
I2C_PAD_CTRL),
.gp = IMX_GPIO_NR(5, 27)
},
.sda = {
.i2c_mode = NEW_PAD_CTRL(MX6_PAD_CSI0_DAT8__I2C1_SDA,
I2C_PAD_CTRL),
.gpio_mode = NEW_PAD_CTRL(MX6_PAD_CSI0_DAT8__GPIO5_IO26,
I2C_PAD_CTRL),
.gp = IMX_GPIO_NR(5, 26)
}
};
static void mba6_setup_i2c(void)
{
int ret;
/*
* use logical index for bus, e.g. I2C1 -> 0
* warn on error
*/
ret = setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &mba6_i2c1_pads);
if (ret)
printf("setup I2C1 failed: %d\n", ret);
}
static iomux_v3_cfg_t const mba6_ecspi1_pads[] = {
NEW_PAD_CTRL(MX6_PAD_EIM_D24__GPIO3_IO24, SPI_PAD_CTRL),
NEW_PAD_CTRL(MX6_PAD_EIM_D25__GPIO3_IO25, SPI_PAD_CTRL),
};
static unsigned const mba6_ecspi1_cs[] = {
IMX_GPIO_NR(3, 24),
IMX_GPIO_NR(3, 25),
};
static void mba6_setup_iomuxc_spi(void)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE(mba6_ecspi1_cs); ++i)
gpio_direction_output(mba6_ecspi1_cs[i], 1);
imx_iomux_v3_setup_multiple_pads(mba6_ecspi1_pads,
ARRAY_SIZE(mba6_ecspi1_pads));
}
int board_phy_config(struct phy_device *phydev)
{
/*
* optimized pad skew values depends on CPU variant on the TQMa6x module:
* i.MX6Q/D or i.MX6DL/S
*/
#if defined(CONFIG_MX6Q) || defined(CONFIG_MX6Q)
#define MBA6X_KSZ9031_CTRL_SKEW 0x0032
#define MBA6X_KSZ9031_CLK_SKEW 0x03ff
#define MBA6X_KSZ9031_RX_SKEW 0x3333
#define MBA6X_KSZ9031_TX_SKEW 0x2036
#elif defined(CONFIG_MX6DL) || defined(CONFIG_MX6S)
#define MBA6X_KSZ9031_CTRL_SKEW 0x0030
#define MBA6X_KSZ9031_CLK_SKEW 0x03ff
#define MBA6X_KSZ9031_RX_SKEW 0x3333
#define MBA6X_KSZ9031_TX_SKEW 0x2052
#else
#error
#endif
/* min rx/tx ctrl delay */
ksz9031_phy_extended_write(phydev, 2,
MII_KSZ9031_EXT_RGMII_CTRL_SIG_SKEW,
MII_KSZ9031_MOD_DATA_NO_POST_INC,
MBA6X_KSZ9031_CTRL_SKEW);
/* min rx delay */
ksz9031_phy_extended_write(phydev, 2,
MII_KSZ9031_EXT_RGMII_RX_DATA_SKEW,
MII_KSZ9031_MOD_DATA_NO_POST_INC,
MBA6X_KSZ9031_RX_SKEW);
/* max tx delay */
ksz9031_phy_extended_write(phydev, 2,
MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW,
MII_KSZ9031_MOD_DATA_NO_POST_INC,
MBA6X_KSZ9031_TX_SKEW);
/* rx/tx clk skew */
ksz9031_phy_extended_write(phydev, 2,
MII_KSZ9031_EXT_RGMII_CLOCK_SKEW,
MII_KSZ9031_MOD_DATA_NO_POST_INC,
MBA6X_KSZ9031_CLK_SKEW);
phydev->drv->config(phydev);
return 0;
}
int board_eth_init(bd_t *bis)
{
uint32_t base = IMX_FEC_BASE;
struct mii_dev *bus = NULL;
struct phy_device *phydev = NULL;
int ret;
bus = fec_get_miibus(base, -1);
if (!bus)
return -EINVAL;
/* scan phy */
phydev = phy_find_by_mask(bus, (0xf << CONFIG_FEC_MXC_PHYADDR),
PHY_INTERFACE_MODE_RGMII);
if (!phydev) {
ret = -EINVAL;
goto free_bus;
}
ret = fec_probe(bis, -1, base, bus, phydev);
if (ret)
goto free_phydev;
return 0;
free_phydev:
free(phydev);
free_bus:
free(bus);
return ret;
}
int tqma6_bb_board_early_init_f(void)
{
mba6_setup_iomuxc_uart();
return 0;
}
int tqma6_bb_board_init(void)
{
mba6_setup_i2c();
mba6_setup_iomuxc_spi();
/* do it here - to have reset completed */
mba6_setup_iomuxc_enet();
return 0;
}
int tqma6_bb_board_late_init(void)
{
return 0;
}
const char *tqma6_bb_get_boardname(void)
{
return "MBa6x";
}
/*
* Device Tree Support
*/
#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
void tqma6_bb_ft_board_setup(void *blob, bd_t *bd)
{
/* TBD */
}
#endif /* defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) */
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