1cb59f9f79
Based on code created by Lothar Waßmann, Sascha Hauer, Wolfram Sang and me. Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
132 lines
3.7 KiB
C
132 lines
3.7 KiB
C
/*
|
|
* Copyright (C) 2010 <LW@KARO-electronics.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it under
|
|
* the terms of the GNU General Public License version 2 as published by the
|
|
* Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/delay.h>
|
|
#include <linux/fec.h>
|
|
#include <linux/gpio.h>
|
|
|
|
#include <mach/iomux-mx28.h>
|
|
#include "../devices-mx28.h"
|
|
|
|
#include "module-tx28.h"
|
|
|
|
#define TX28_FEC_PHY_POWER MXS_GPIO_NR(3, 29)
|
|
#define TX28_FEC_PHY_RESET MXS_GPIO_NR(4, 13)
|
|
|
|
static const iomux_cfg_t tx28_fec_gpio_pads[] __initconst = {
|
|
/* PHY POWER */
|
|
MX28_PAD_PWM4__GPIO_3_29 |
|
|
MXS_PAD_4MA | MXS_PAD_NOPULL | MXS_PAD_3V3,
|
|
/* PHY RESET */
|
|
MX28_PAD_ENET0_RX_CLK__GPIO_4_13 |
|
|
MXS_PAD_4MA | MXS_PAD_NOPULL | MXS_PAD_3V3,
|
|
/* Mode strap pins 0-2 */
|
|
MX28_PAD_ENET0_RXD0__GPIO_4_3 |
|
|
MXS_PAD_8MA | MXS_PAD_PULLUP | MXS_PAD_3V3,
|
|
MX28_PAD_ENET0_RXD1__GPIO_4_4 |
|
|
MXS_PAD_8MA | MXS_PAD_PULLUP | MXS_PAD_3V3,
|
|
MX28_PAD_ENET0_RX_EN__GPIO_4_2 |
|
|
MXS_PAD_8MA | MXS_PAD_PULLUP | MXS_PAD_3V3,
|
|
/* nINT */
|
|
MX28_PAD_ENET0_TX_CLK__GPIO_4_5 |
|
|
MXS_PAD_4MA | MXS_PAD_NOPULL | MXS_PAD_3V3,
|
|
|
|
MX28_PAD_ENET0_MDC__GPIO_4_0,
|
|
MX28_PAD_ENET0_MDIO__GPIO_4_1,
|
|
MX28_PAD_ENET0_TX_EN__GPIO_4_6,
|
|
MX28_PAD_ENET0_TXD0__GPIO_4_7,
|
|
MX28_PAD_ENET0_TXD1__GPIO_4_8,
|
|
MX28_PAD_ENET_CLK__GPIO_4_16,
|
|
};
|
|
|
|
#define FEC_MODE (MXS_PAD_8MA | MXS_PAD_PULLUP | MXS_PAD_3V3)
|
|
static const iomux_cfg_t tx28_fec_pads[] __initconst = {
|
|
MX28_PAD_ENET0_MDC__ENET0_MDC | FEC_MODE,
|
|
MX28_PAD_ENET0_MDIO__ENET0_MDIO | FEC_MODE,
|
|
MX28_PAD_ENET0_RX_EN__ENET0_RX_EN | FEC_MODE,
|
|
MX28_PAD_ENET0_RXD0__ENET0_RXD0 | FEC_MODE,
|
|
MX28_PAD_ENET0_RXD1__ENET0_RXD1 | FEC_MODE,
|
|
MX28_PAD_ENET0_TX_EN__ENET0_TX_EN | FEC_MODE,
|
|
MX28_PAD_ENET0_TXD0__ENET0_TXD0 | FEC_MODE,
|
|
MX28_PAD_ENET0_TXD1__ENET0_TXD1 | FEC_MODE,
|
|
MX28_PAD_ENET_CLK__CLKCTRL_ENET | FEC_MODE,
|
|
};
|
|
|
|
static const struct fec_platform_data tx28_fec_data __initconst = {
|
|
.phy = PHY_INTERFACE_MODE_RMII,
|
|
};
|
|
|
|
int __init tx28_add_fec0(void)
|
|
{
|
|
int i, ret;
|
|
|
|
pr_debug("%s: Switching FEC PHY power off\n", __func__);
|
|
ret = mxs_iomux_setup_multiple_pads(tx28_fec_gpio_pads,
|
|
ARRAY_SIZE(tx28_fec_gpio_pads));
|
|
for (i = 0; i < ARRAY_SIZE(tx28_fec_gpio_pads); i++) {
|
|
unsigned int gpio = MXS_GPIO_NR(PAD_BANK(tx28_fec_gpio_pads[i]),
|
|
PAD_PIN(tx28_fec_gpio_pads[i]));
|
|
|
|
ret = gpio_request(gpio, "FEC");
|
|
if (ret) {
|
|
pr_err("Failed to request GPIO_%d_%d: %d\n",
|
|
PAD_BANK(tx28_fec_gpio_pads[i]),
|
|
PAD_PIN(tx28_fec_gpio_pads[i]), ret);
|
|
goto free_gpios;
|
|
}
|
|
ret = gpio_direction_output(gpio, 0);
|
|
if (ret) {
|
|
pr_err("Failed to set direction of GPIO_%d_%d to output: %d\n",
|
|
gpio / 32 + 1, gpio % 32, ret);
|
|
goto free_gpios;
|
|
}
|
|
}
|
|
|
|
/* Power up fec phy */
|
|
pr_debug("%s: Switching FEC PHY power on\n", __func__);
|
|
ret = gpio_direction_output(TX28_FEC_PHY_POWER, 1);
|
|
if (ret) {
|
|
pr_err("Failed to power on PHY: %d\n", ret);
|
|
goto free_gpios;
|
|
}
|
|
mdelay(26); /* 25ms according to data sheet */
|
|
|
|
/* nINT */
|
|
gpio_direction_input(MXS_GPIO_NR(4, 5));
|
|
/* Mode strap pins */
|
|
gpio_direction_output(MXS_GPIO_NR(4, 2), 1);
|
|
gpio_direction_output(MXS_GPIO_NR(4, 3), 1);
|
|
gpio_direction_output(MXS_GPIO_NR(4, 4), 1);
|
|
|
|
udelay(100); /* minimum assertion time for nRST */
|
|
|
|
pr_debug("%s: Deasserting FEC PHY RESET\n", __func__);
|
|
gpio_set_value(TX28_FEC_PHY_RESET, 1);
|
|
|
|
ret = mxs_iomux_setup_multiple_pads(tx28_fec_pads,
|
|
ARRAY_SIZE(tx28_fec_pads));
|
|
if (ret) {
|
|
pr_debug("%s: mxs_iomux_setup_multiple_pads() failed with rc: %d\n",
|
|
__func__, ret);
|
|
goto free_gpios;
|
|
}
|
|
pr_debug("%s: Registering FEC device\n", __func__);
|
|
mx28_add_fec(0, &tx28_fec_data);
|
|
return 0;
|
|
|
|
free_gpios:
|
|
while (--i >= 0) {
|
|
unsigned int gpio = MXS_GPIO_NR(PAD_BANK(tx28_fec_gpio_pads[i]),
|
|
PAD_PIN(tx28_fec_gpio_pads[i]));
|
|
|
|
gpio_free(gpio);
|
|
}
|
|
|
|
return ret;
|
|
}
|