linux/arch/arm/mach-mxs/mach-m28evk.c

/*
 * Copyright (C) 2011
 * Stefano Babic, DENX Software Engineering, <sbabic@denx.de>
 *
 * based on: mach-mx28_evk.c
 * Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/leds.h>
#include <linux/irq.h>
#include <linux/clk.h>
#include <linux/i2c.h>
#include <linux/i2c/at24.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>

#include <mach/common.h>
#include <mach/iomux-mx28.h>

#include "devices-mx28.h"

#define M28EVK_GPIO_USERLED1	MXS_GPIO_NR(3, 16)
#define M28EVK_GPIO_USERLED2	MXS_GPIO_NR(3, 17)

#define MX28EVK_BL_ENABLE	MXS_GPIO_NR(3, 18)
#define M28EVK_LCD_ENABLE	MXS_GPIO_NR(3, 28)

#define MX28EVK_MMC0_WRITE_PROTECT	MXS_GPIO_NR(2, 12)
#define MX28EVK_MMC1_WRITE_PROTECT	MXS_GPIO_NR(0, 28)

static const iomux_cfg_t m28evk_pads[] __initconst = {
	/* duart */
	MX28_PAD_AUART0_CTS__DUART_RX | MXS_PAD_CTRL,
	MX28_PAD_AUART0_RTS__DUART_TX | MXS_PAD_CTRL,

	/* auart0 */
	MX28_PAD_AUART0_RX__AUART0_RX | MXS_PAD_CTRL,
	MX28_PAD_AUART0_TX__AUART0_TX | MXS_PAD_CTRL,

	/* auart3 */
	MX28_PAD_AUART3_RX__AUART3_RX | MXS_PAD_CTRL,
	MX28_PAD_AUART3_TX__AUART3_TX | MXS_PAD_CTRL,
	MX28_PAD_AUART3_CTS__AUART3_CTS | MXS_PAD_CTRL,
	MX28_PAD_AUART3_RTS__AUART3_RTS | MXS_PAD_CTRL,

#define MXS_PAD_FEC	(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP)
	/* fec0 */
	MX28_PAD_ENET0_MDC__ENET0_MDC | MXS_PAD_FEC,
	MX28_PAD_ENET0_MDIO__ENET0_MDIO | MXS_PAD_FEC,
	MX28_PAD_ENET0_RX_EN__ENET0_RX_EN | MXS_PAD_FEC,
	MX28_PAD_ENET0_RXD0__ENET0_RXD0 | MXS_PAD_FEC,
	MX28_PAD_ENET0_RXD1__ENET0_RXD1 | MXS_PAD_FEC,
	MX28_PAD_ENET0_TX_EN__ENET0_TX_EN | MXS_PAD_FEC,
	MX28_PAD_ENET0_TXD0__ENET0_TXD0 | MXS_PAD_FEC,
	MX28_PAD_ENET0_TXD1__ENET0_TXD1 | MXS_PAD_FEC,
	MX28_PAD_ENET_CLK__CLKCTRL_ENET | MXS_PAD_FEC,
	/* fec1 */
	MX28_PAD_ENET0_CRS__ENET1_RX_EN | MXS_PAD_FEC,
	MX28_PAD_ENET0_RXD2__ENET1_RXD0 | MXS_PAD_FEC,
	MX28_PAD_ENET0_RXD3__ENET1_RXD1 | MXS_PAD_FEC,
	MX28_PAD_ENET0_COL__ENET1_TX_EN | MXS_PAD_FEC,
	MX28_PAD_ENET0_TXD2__ENET1_TXD0 | MXS_PAD_FEC,
	MX28_PAD_ENET0_TXD3__ENET1_TXD1 | MXS_PAD_FEC,

	/* flexcan0 */
	MX28_PAD_GPMI_RDY2__CAN0_TX,
	MX28_PAD_GPMI_RDY3__CAN0_RX,

	/* flexcan1 */
	MX28_PAD_GPMI_CE2N__CAN1_TX,
	MX28_PAD_GPMI_CE3N__CAN1_RX,

	/* I2C */
	MX28_PAD_I2C0_SCL__I2C0_SCL,
	MX28_PAD_I2C0_SDA__I2C0_SDA,

	/* mxsfb (lcdif) */
	MX28_PAD_LCD_D00__LCD_D0 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D01__LCD_D1 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D02__LCD_D2 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D03__LCD_D3 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D04__LCD_D4 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D05__LCD_D5 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D06__LCD_D6 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D07__LCD_D7 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D08__LCD_D8 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D09__LCD_D9 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D10__LCD_D10 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D11__LCD_D11 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D12__LCD_D12 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D13__LCD_D13 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D14__LCD_D14 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D15__LCD_D15 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D16__LCD_D16 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D17__LCD_D17 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D18__LCD_D18 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D19__LCD_D19 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D20__LCD_D20 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D21__LCD_D21 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D22__LCD_D22 | MXS_PAD_CTRL,
	MX28_PAD_LCD_D23__LCD_D23 | MXS_PAD_CTRL,

	MX28_PAD_LCD_ENABLE__LCD_ENABLE	| MXS_PAD_CTRL,
	MX28_PAD_LCD_DOTCLK__LCD_DOTCLK | MXS_PAD_CTRL,

	/* mmc0 */
	MX28_PAD_SSP0_DATA0__SSP0_D0 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA1__SSP0_D1 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA2__SSP0_D2 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA3__SSP0_D3 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA4__SSP0_D4 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA5__SSP0_D5 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA6__SSP0_D6 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DATA7__SSP0_D7 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_CMD__SSP0_CMD |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_SSP0_DETECT__SSP0_CARD_DETECT |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
	MX28_PAD_SSP0_SCK__SSP0_SCK |
		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),

	/* mmc1 */
	MX28_PAD_GPMI_D00__SSP1_D0 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_GPMI_D01__SSP1_D1 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_GPMI_D02__SSP1_D2 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_GPMI_D03__SSP1_D3 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_GPMI_D04__SSP1_D4 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_GPMI_D05__SSP1_D5 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_GPMI_D06__SSP1_D6 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_GPMI_D07__SSP1_D7 |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_GPMI_RDY1__SSP1_CMD |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
	MX28_PAD_GPMI_RDY0__SSP1_CARD_DETECT |
		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
	MX28_PAD_GPMI_WRN__SSP1_SCK |
		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
	/* write protect */
	MX28_PAD_GPMI_RESETN__GPIO_0_28 |
		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),
	/* slot power enable */
	MX28_PAD_PWM4__GPIO_3_29 |
		(MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL),

	/* led */
	MX28_PAD_PWM0__GPIO_3_16 | MXS_PAD_CTRL,
	MX28_PAD_PWM1__GPIO_3_17 | MXS_PAD_CTRL,

	/* nand */
	MX28_PAD_GPMI_D00__GPMI_D0 |
		(MXS_PAD_4MA | MXS_PAD_1V8 | MXS_PAD_NOPULL),
	MX28_PAD_GPMI_D01__GPMI_D1 |
		(MXS_PAD_4MA | MXS_PAD_1V8 | MXS_PAD_NOPULL),
	MX28_PAD_GPMI_D02__GPMI_D2 |
		(MXS_PAD_4MA | MXS_PAD_1V8 | MXS_PAD_NOPULL),
	MX28_PAD_GPMI_D03__GPMI_D3 |
		(MXS_PAD_4MA | MXS_PAD_1V8 | MXS_PAD_NOPULL),
	MX28_PAD_GPMI_D04__GPMI_D4 |
		(MXS_PAD_4MA | MXS_PAD_1V8 | MXS_PAD_NOPULL),
	MX28_PAD_GPMI_D05__GPMI_D5 |
		(MXS_PAD_4MA | MXS_PAD_1V8 | MXS_PAD_NOPULL),
	MX28_PAD_GPMI_D06__GPMI_D6 |
		(MXS_PAD_4MA | MXS_PAD_1V8 | MXS_PAD_NOPULL),
	MX28_PAD_GPMI_D07__GPMI_D7 |
		(MXS_PAD_4MA | MXS_PAD_1V8 | MXS_PAD_NOPULL),
	MX28_PAD_GPMI_CE0N__GPMI_CE0N |
		(MXS_PAD_4MA | MXS_PAD_1V8 | MXS_PAD_NOPULL),
	MX28_PAD_GPMI_RDY0__GPMI_READY0 |
		(MXS_PAD_4MA | MXS_PAD_1V8 | MXS_PAD_NOPULL),
	MX28_PAD_GPMI_RDN__GPMI_RDN |
		(MXS_PAD_12MA | MXS_PAD_1V8 | MXS_PAD_PULLUP),
	MX28_PAD_GPMI_WRN__GPMI_WRN |
		(MXS_PAD_12MA | MXS_PAD_1V8 | MXS_PAD_PULLUP),
	MX28_PAD_GPMI_ALE__GPMI_ALE |
		(MXS_PAD_4MA | MXS_PAD_1V8 | MXS_PAD_PULLUP),
	MX28_PAD_GPMI_CLE__GPMI_CLE |
		(MXS_PAD_4MA | MXS_PAD_1V8 | MXS_PAD_PULLUP),
	MX28_PAD_GPMI_RESETN__GPMI_RESETN |
		(MXS_PAD_12MA | MXS_PAD_1V8 | MXS_PAD_PULLUP),

	/* Backlight */
	MX28_PAD_PWM3__GPIO_3_28 | MXS_PAD_CTRL,
};

/* led */
static const struct gpio_led m28evk_leds[] __initconst = {
	{
		.name = "user-led1",
		.default_trigger = "heartbeat",
		.gpio = M28EVK_GPIO_USERLED1,
	},
	{
		.name = "user-led2",
		.default_trigger = "heartbeat",
		.gpio = M28EVK_GPIO_USERLED2,
	},
};

static const struct gpio_led_platform_data m28evk_led_data __initconst = {
	.leds = m28evk_leds,
	.num_leds = ARRAY_SIZE(m28evk_leds),
};

static struct fec_platform_data mx28_fec_pdata[] __initdata = {
	{
		/* fec0 */
		.phy = PHY_INTERFACE_MODE_RMII,
	}, {
		/* fec1 */
		.phy = PHY_INTERFACE_MODE_RMII,
	},
};

static int __init m28evk_fec_get_mac(void)
{
	int i;
	u32 val;
	const u32 *ocotp = mxs_get_ocotp();

	if (!ocotp) {
		pr_err("%s: timeout when reading fec mac from OCOTP\n",
			__func__);
		return -ETIMEDOUT;
	}

	/*
	 * OCOTP only stores the last 4 octets for each mac address,
	 * so hard-code DENX OUI (C0:E5:4E) here.
	 */
	for (i = 0; i < 2; i++) {
		val = ocotp[i * 4];
		mx28_fec_pdata[i].mac[0] = 0xC0;
		mx28_fec_pdata[i].mac[1] = 0xE5;
		mx28_fec_pdata[i].mac[2] = 0x4E;
		mx28_fec_pdata[i].mac[3] = (val >> 16) & 0xff;
		mx28_fec_pdata[i].mac[4] = (val >> 8) & 0xff;
		mx28_fec_pdata[i].mac[5] = (val >> 0) & 0xff;
	}

	return 0;
}

/* mxsfb (lcdif) */
static struct fb_videomode m28evk_video_modes[] = {
	{
		.name		= "Ampire AM-800480R2TMQW-T01H",
		.refresh	= 60,
		.xres		= 800,
		.yres		= 480,
		.pixclock	= 30066, /* picosecond (33.26 MHz) */
		.left_margin	= 0,
		.right_margin	= 256,
		.upper_margin	= 0,
		.lower_margin	= 45,
		.hsync_len	= 1,
		.vsync_len	= 1,
		.sync		= FB_SYNC_DATA_ENABLE_HIGH_ACT,
	},
};

static const struct mxsfb_platform_data m28evk_mxsfb_pdata __initconst = {
	.mode_list	= m28evk_video_modes,
	.mode_count	= ARRAY_SIZE(m28evk_video_modes),
	.default_bpp	= 16,
	.ld_intf_width	= STMLCDIF_18BIT,
};

static struct at24_platform_data m28evk_eeprom = {
	.byte_len = 16384,
	.page_size = 32,
	.flags = AT24_FLAG_ADDR16,
};

static struct i2c_board_info m28_stk5v3_i2c_boardinfo[] __initdata = {
	{
		I2C_BOARD_INFO("at24", 0x51),	/* E0=1, E1=0, E2=0 */
		.platform_data = &m28evk_eeprom,
	},
};

static struct mxs_mmc_platform_data m28evk_mmc_pdata[] __initdata = {
	{
		/* mmc0 */
		.wp_gpio = MX28EVK_MMC0_WRITE_PROTECT,
		.flags = SLOTF_8_BIT_CAPABLE,
	}, {
		/* mmc1 */
		.wp_gpio = MX28EVK_MMC1_WRITE_PROTECT,
		.flags = SLOTF_8_BIT_CAPABLE,
	},
};

static void __init m28evk_init(void)
{
	mxs_iomux_setup_multiple_pads(m28evk_pads, ARRAY_SIZE(m28evk_pads));

	mx28_add_duart();
	mx28_add_auart0();
	mx28_add_auart3();

	if (!m28evk_fec_get_mac()) {
		mx28_add_fec(0, &mx28_fec_pdata[0]);
		mx28_add_fec(1, &mx28_fec_pdata[1]);
	}

	mx28_add_flexcan(0, NULL);
	mx28_add_flexcan(1, NULL);

	mx28_add_mxsfb(&m28evk_mxsfb_pdata);

	mx28_add_mxs_mmc(0, &m28evk_mmc_pdata[0]);
	mx28_add_mxs_mmc(1, &m28evk_mmc_pdata[1]);

	gpio_led_register_device(0, &m28evk_led_data);

	/* I2C */
	mx28_add_mxs_i2c(0);
	i2c_register_board_info(0, m28_stk5v3_i2c_boardinfo,
			ARRAY_SIZE(m28_stk5v3_i2c_boardinfo));
}

static void __init m28evk_timer_init(void)
{
	mx28_clocks_init();
}

static struct sys_timer m28evk_timer = {
	.init	= m28evk_timer_init,
};

MACHINE_START(M28EVK, "DENX M28 EVK")
	.map_io		= mx28_map_io,
	.init_irq	= mx28_init_irq,
	.timer		= &m28evk_timer,
	.init_machine	= m28evk_init,
	.restart	= mxs_restart,
MACHINE_END