mach-mxs.c

/*
 * Copyright 2012 Freescale Semiconductor, Inc.
 * Copyright 2012 Linaro Ltd.
 *
 * The code contained herein is licensed under the GNU General Public
 * License. You may obtain a copy of the GNU General Public License
 * Version 2 or later at the following locations:
 *
 * http://www.opensource.org/licenses/gpl-license.html
 * http://www.gnu.org/copyleft/gpl.html
 */

#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/init.h>
#include <linux/irqdomain.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include <mach/common.h>

static int __init mxs_icoll_add_irq_domain(struct device_node *np,
				struct device_node *interrupt_parent)
{
	irq_domain_add_legacy(np, 128, 0, 0, &irq_domain_simple_ops, NULL);

	return 0;
}

static int __init mxs_gpio_add_irq_domain(struct device_node *np,
				struct device_node *interrupt_parent)
{
	static int gpio_irq_base = MXS_GPIO_IRQ_START;

	irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops, NULL);
	gpio_irq_base += 32;

	return 0;
}

static const struct of_device_id mxs_irq_match[] __initconst = {
	{ .compatible = "fsl,mxs-icoll", .data = mxs_icoll_add_irq_domain, },
	{ .compatible = "fsl,mxs-gpio", .data = mxs_gpio_add_irq_domain, },
	{ /* sentinel */ }
};

static void __init mxs_dt_init_irq(void)
{
	icoll_init_irq();
	of_irq_init(mxs_irq_match);
}

static void __init imx23_timer_init(void)
{
	mx23_clocks_init();
}

static struct sys_timer imx23_timer = {
	.init = imx23_timer_init,
};

static void __init imx28_timer_init(void)
{
	mx28_clocks_init();
}

static struct sys_timer imx28_timer = {
	.init = imx28_timer_init,
};

enum mac_oui {
	OUI_FSL,
	OUI_DENX,
};

static void __init update_fec_mac_prop(enum mac_oui oui)
{
	struct device_node *np, *from = NULL;
	struct property *oldmac, *newmac;
	const u32 *ocotp = mxs_get_ocotp();
	u8 *macaddr;
	u32 val;
	int i;

	for (i = 0; i < 2; i++) {
		np = of_find_compatible_node(from, NULL, "fsl,imx28-fec");
		if (!np)
			return;
		from = np;

		newmac = kzalloc(sizeof(*newmac) + 6, GFP_KERNEL);
		if (!newmac)
			return;
		newmac->value = newmac + 1;
		newmac->length = 6;

		newmac->name = kstrdup("local-mac-address", GFP_KERNEL);
		if (!newmac->name) {
			kfree(newmac);
			return;
		}

		/*
		 * OCOTP only stores the last 4 octets for each mac address,
		 * so hard-code OUI here.
		 */
		macaddr = newmac->value;
		switch (oui) {
		case OUI_FSL:
			macaddr[0] = 0x00;
			macaddr[1] = 0x04;
			macaddr[2] = 0x9f;
			break;
		case OUI_DENX:
			macaddr[0] = 0xc0;
			macaddr[1] = 0xe5;
			macaddr[2] = 0x4e;
			break;
		}
		val = ocotp[i];
		macaddr[3] = (val >> 16) & 0xff;
		macaddr[4] = (val >> 8) & 0xff;
		macaddr[5] = (val >> 0) & 0xff;

		oldmac = of_find_property(np, newmac->name, NULL);
		if (oldmac)
			prom_update_property(np, newmac, oldmac);
		else
			prom_add_property(np, newmac);
	}
}

static void __init imx28_evk_init(void)
{
	struct clk *clk;

	/* Enable fec phy clock */
	clk = clk_get_sys("enet_out", NULL);
	if (!IS_ERR(clk))
		clk_prepare_enable(clk);

	update_fec_mac_prop(OUI_FSL);
}

static void __init mxs_machine_init(void)
{
	if (of_machine_is_compatible("fsl,imx28-evk"))
		imx28_evk_init();

	of_platform_populate(NULL, of_default_bus_match_table,
				NULL, NULL);
}

static const char *imx23_dt_compat[] __initdata = {
	"fsl,imx23-evk",
	"fsl,imx23",
	NULL,
};

static const char *imx28_dt_compat[] __initdata = {
	"crystalfontz,cfa10036",
	"fsl,imx28-evk",
	"fsl,imx28",
	NULL,
};

DT_MACHINE_START(IMX23, "Freescale i.MX23 (Device Tree)")
	.map_io		= mx23_map_io,
	.init_irq	= mxs_dt_init_irq,
	.timer		= &imx23_timer,
	.init_machine	= mxs_machine_init,
	.dt_compat	= imx23_dt_compat,
	.restart	= mxs_restart,
MACHINE_END

DT_MACHINE_START(IMX28, "Freescale i.MX28 (Device Tree)")
	.map_io		= mx28_map_io,
	.init_irq	= mxs_dt_init_irq,
	.timer		= &imx28_timer,
	.init_machine	= mxs_machine_init,
	.dt_compat	= imx28_dt_compat,
	.restart	= mxs_restart,
MACHINE_END