forked from Minki/linux
4afbbb7c1b
Add initial mx28evk support with duart and fec0. Signed-off-by: Shawn Guo <shawn.guo@freescale.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
139 lines
3.6 KiB
C
139 lines
3.6 KiB
C
/*
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* Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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 <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <linux/irq.h>
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#include <linux/clk.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/time.h>
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#include <mach/common.h>
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#include <mach/iomux-mx28.h>
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#include "devices-mx28.h"
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#include "gpio.h"
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#define MX28EVK_FEC_PHY_POWER MXS_GPIO_NR(2, 15)
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#define MX28EVK_FEC_PHY_RESET MXS_GPIO_NR(4, 13)
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static const iomux_cfg_t mx28evk_pads[] __initconst = {
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/* duart */
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MX28_PAD_PWM0__DUART_RX |
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(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
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MX28_PAD_PWM1__DUART_TX |
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(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
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/* fec0 */
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MX28_PAD_ENET0_MDC__ENET0_MDC |
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(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
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MX28_PAD_ENET0_MDIO__ENET0_MDIO |
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(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
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MX28_PAD_ENET0_RX_EN__ENET0_RX_EN |
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(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
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MX28_PAD_ENET0_RXD0__ENET0_RXD0 |
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(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
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MX28_PAD_ENET0_RXD1__ENET0_RXD1 |
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(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
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MX28_PAD_ENET0_TX_EN__ENET0_TX_EN |
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(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
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MX28_PAD_ENET0_TXD0__ENET0_TXD0 |
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(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
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MX28_PAD_ENET0_TXD1__ENET0_TXD1 |
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(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
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MX28_PAD_ENET_CLK__CLKCTRL_ENET |
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(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
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/* phy power line */
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MX28_PAD_SSP1_DATA3__GPIO_2_15 |
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(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
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/* phy reset line */
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MX28_PAD_ENET0_RX_CLK__GPIO_4_13 |
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(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
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};
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/* fec */
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static void __init mx28evk_fec_reset(void)
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{
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int ret;
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struct clk *clk;
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/* Enable fec phy clock */
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clk = clk_get_sys("pll2", NULL);
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if (!IS_ERR(clk))
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clk_enable(clk);
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/* Power up fec phy */
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ret = gpio_request(MX28EVK_FEC_PHY_POWER, "fec-phy-power");
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if (ret) {
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pr_err("Failed to request gpio fec-phy-%s: %d\n", "power", ret);
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return;
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}
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ret = gpio_direction_output(MX28EVK_FEC_PHY_POWER, 0);
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if (ret) {
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pr_err("Failed to drive gpio fec-phy-%s: %d\n", "power", ret);
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return;
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}
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/* Reset fec phy */
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ret = gpio_request(MX28EVK_FEC_PHY_RESET, "fec-phy-reset");
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if (ret) {
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pr_err("Failed to request gpio fec-phy-%s: %d\n", "reset", ret);
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return;
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}
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gpio_direction_output(MX28EVK_FEC_PHY_RESET, 0);
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if (ret) {
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pr_err("Failed to drive gpio fec-phy-%s: %d\n", "reset", ret);
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return;
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}
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mdelay(1);
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gpio_set_value(MX28EVK_FEC_PHY_RESET, 1);
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}
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static const struct fec_platform_data mx28_fec_pdata __initconst = {
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.phy = PHY_INTERFACE_MODE_RMII,
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};
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static void __init mx28evk_init(void)
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{
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mxs_iomux_setup_multiple_pads(mx28evk_pads, ARRAY_SIZE(mx28evk_pads));
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mx28_add_duart();
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mx28evk_fec_reset();
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mx28_add_fec(0, &mx28_fec_pdata);
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}
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static void __init mx28evk_timer_init(void)
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{
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mx28_clocks_init();
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}
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static struct sys_timer mx28evk_timer = {
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.init = mx28evk_timer_init,
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};
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MACHINE_START(MX28EVK, "Freescale MX28 EVK")
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/* Maintainer: Freescale Semiconductor, Inc. */
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.map_io = mx28_map_io,
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.init_irq = mx28_init_irq,
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.init_machine = mx28evk_init,
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.timer = &mx28evk_timer,
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MACHINE_END
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