board-mx53_ard.c

/*
 * Copyright (C) 2011 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.

 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <linux/init.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/smsc911x.h>

#include <mach/common.h>
#include <mach/hardware.h>
#include <mach/iomux-mx53.h>

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

#include "crm_regs.h"
#include "devices-imx53.h"

#define ARD_ETHERNET_INT_B	IMX_GPIO_NR(2, 31)

static iomux_v3_cfg_t mx53_ard_pads[] = {
	/* UART1 */
	MX53_PAD_PATA_DIOW__UART1_TXD_MUX,
	MX53_PAD_PATA_DMACK__UART1_RXD_MUX,
	/* WEIM for CS1 */
	MX53_PAD_EIM_EB3__GPIO2_31, /* ETHERNET_INT_B */
	MX53_PAD_EIM_D16__EMI_WEIM_D_16,
	MX53_PAD_EIM_D17__EMI_WEIM_D_17,
	MX53_PAD_EIM_D18__EMI_WEIM_D_18,
	MX53_PAD_EIM_D19__EMI_WEIM_D_19,
	MX53_PAD_EIM_D20__EMI_WEIM_D_20,
	MX53_PAD_EIM_D21__EMI_WEIM_D_21,
	MX53_PAD_EIM_D22__EMI_WEIM_D_22,
	MX53_PAD_EIM_D23__EMI_WEIM_D_23,
	MX53_PAD_EIM_D24__EMI_WEIM_D_24,
	MX53_PAD_EIM_D25__EMI_WEIM_D_25,
	MX53_PAD_EIM_D26__EMI_WEIM_D_26,
	MX53_PAD_EIM_D27__EMI_WEIM_D_27,
	MX53_PAD_EIM_D28__EMI_WEIM_D_28,
	MX53_PAD_EIM_D29__EMI_WEIM_D_29,
	MX53_PAD_EIM_D30__EMI_WEIM_D_30,
	MX53_PAD_EIM_D31__EMI_WEIM_D_31,
	MX53_PAD_EIM_DA0__EMI_NAND_WEIM_DA_0,
	MX53_PAD_EIM_DA1__EMI_NAND_WEIM_DA_1,
	MX53_PAD_EIM_DA2__EMI_NAND_WEIM_DA_2,
	MX53_PAD_EIM_DA3__EMI_NAND_WEIM_DA_3,
	MX53_PAD_EIM_DA4__EMI_NAND_WEIM_DA_4,
	MX53_PAD_EIM_DA5__EMI_NAND_WEIM_DA_5,
	MX53_PAD_EIM_DA6__EMI_NAND_WEIM_DA_6,
	MX53_PAD_EIM_OE__EMI_WEIM_OE,
	MX53_PAD_EIM_RW__EMI_WEIM_RW,
	MX53_PAD_EIM_CS1__EMI_WEIM_CS_1,
};

static struct resource ard_smsc911x_resources[] = {
	{
		.start = MX53_CS1_64MB_BASE_ADDR,
		.end = MX53_CS1_64MB_BASE_ADDR + SZ_32M - 1,
		.flags = IORESOURCE_MEM,
	},
	{
		.start =  gpio_to_irq(ARD_ETHERNET_INT_B),
		.end =  gpio_to_irq(ARD_ETHERNET_INT_B),
		.flags = IORESOURCE_IRQ,
	},
};

struct smsc911x_platform_config ard_smsc911x_config = {
	.irq_polarity = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
	.irq_type = SMSC911X_IRQ_TYPE_PUSH_PULL,
	.flags = SMSC911X_USE_32BIT,
};

static struct platform_device ard_smsc_lan9220_device = {
	.name = "smsc911x",
	.id = -1,
	.num_resources = ARRAY_SIZE(ard_smsc911x_resources),
	.resource = ard_smsc911x_resources,
	.dev = {
		.platform_data = &ard_smsc911x_config,
	},
};

static void __init mx53_ard_io_init(void)
{
	mxc_iomux_v3_setup_multiple_pads(mx53_ard_pads,
				ARRAY_SIZE(mx53_ard_pads));

	gpio_request(ARD_ETHERNET_INT_B, "eth-int-b");
	gpio_direction_input(ARD_ETHERNET_INT_B);
}

 /* Config CS1 settings for ethernet controller */
static int weim_cs_config(void)
{
	u32 reg;
	void __iomem *weim_base, *iomuxc_base;

	weim_base = ioremap(MX53_WEIM_BASE_ADDR, SZ_4K);
	if (!weim_base)
		return -ENOMEM;

	iomuxc_base = ioremap(MX53_IOMUXC_BASE_ADDR, SZ_4K);
	if (!iomuxc_base)
		return -ENOMEM;

	/* CS1 timings for LAN9220 */
	writel(0x20001, (weim_base + 0x18));
	writel(0x0, (weim_base + 0x1C));
	writel(0x16000202, (weim_base + 0x20));
	writel(0x00000002, (weim_base + 0x24));
	writel(0x16002082, (weim_base + 0x28));
	writel(0x00000000, (weim_base + 0x2C));
	writel(0x00000000, (weim_base + 0x90));

	/* specify 64 MB on CS1 and CS0 on GPR1 */
	reg = readl(iomuxc_base + 0x4);
	reg &= ~0x3F;
	reg |= 0x1B;
	writel(reg, (iomuxc_base + 0x4));

	iounmap(iomuxc_base);
	iounmap(weim_base);

	return 0;
}

static struct platform_device *devices[] __initdata = {
	&ard_smsc_lan9220_device,
};

static void __init mx53_ard_board_init(void)
{
	imx53_soc_init();
	imx53_add_imx_uart(0, NULL);

	mx53_ard_io_init();
	weim_cs_config();
	platform_add_devices(devices, ARRAY_SIZE(devices));
}

static void __init mx53_ard_timer_init(void)
{
	mx53_clocks_init(32768, 24000000, 22579200, 0);
}

static struct sys_timer mx53_ard_timer = {
	.init	= mx53_ard_timer_init,
};

MACHINE_START(MX53_ARD, "Freescale MX53 ARD Board")
	.map_io = mx53_map_io,
	.init_early = imx53_init_early,
	.init_irq = mx53_init_irq,
	.timer = &mx53_ard_timer,
	.init_machine = mx53_ard_board_init,
MACHINE_END