ep88xc.c

linux内核源码

/*
 * Platform setup for the Embedded Planet EP88xC board
 *
 * Author: Scott Wood <[e-mail]>
 * Copyright 2007 Freescale Semiconductor, Inc.
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2. This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 */

#include <linux/init.h>
#include <linux/of_platform.h>

#include <asm/machdep.h>
#include <asm/io.h>
#include <asm/udbg.h>
#include <asm/commproc.h>

#include <sysdev/commproc.h>

struct cpm_pin {
	int port, pin, flags;
};

static struct cpm_pin ep88xc_pins[] = {
	/* SMC1 */
	{1, 24, CPM_PIN_INPUT}, /* RX */
	{1, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */

	/* SCC2 */
	{0, 12, CPM_PIN_INPUT}, /* TX */
	{0, 13, CPM_PIN_INPUT}, /* RX */
	{2, 8, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CD */
	{2, 9, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CTS */
	{2, 14, CPM_PIN_INPUT}, /* RTS */

	/* MII1 */
	{0, 0, CPM_PIN_INPUT},
	{0, 1, CPM_PIN_INPUT},
	{0, 2, CPM_PIN_INPUT},
	{0, 3, CPM_PIN_INPUT},
	{0, 4, CPM_PIN_OUTPUT},
	{0, 10, CPM_PIN_OUTPUT},
	{0, 11, CPM_PIN_OUTPUT},
	{1, 19, CPM_PIN_INPUT},
	{1, 31, CPM_PIN_INPUT},
	{2, 12, CPM_PIN_INPUT},
	{2, 13, CPM_PIN_INPUT},
	{3, 8, CPM_PIN_INPUT},
	{4, 30, CPM_PIN_OUTPUT},
	{4, 31, CPM_PIN_OUTPUT},

	/* MII2 */
	{4, 14, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
	{4, 15, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
	{4, 16, CPM_PIN_OUTPUT},
	{4, 17, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
	{4, 18, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
	{4, 19, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
	{4, 20, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
	{4, 21, CPM_PIN_OUTPUT},
	{4, 22, CPM_PIN_OUTPUT},
	{4, 23, CPM_PIN_OUTPUT},
	{4, 24, CPM_PIN_OUTPUT},
	{4, 25, CPM_PIN_OUTPUT},
	{4, 26, CPM_PIN_OUTPUT},
	{4, 27, CPM_PIN_OUTPUT},
	{4, 28, CPM_PIN_OUTPUT},
	{4, 29, CPM_PIN_OUTPUT},

	/* USB */
	{0, 6, CPM_PIN_INPUT},  /* CLK2 */
	{0, 14, CPM_PIN_INPUT}, /* USBOE */
	{0, 15, CPM_PIN_INPUT}, /* USBRXD */
	{2, 6, CPM_PIN_OUTPUT}, /* USBTXN */
	{2, 7, CPM_PIN_OUTPUT}, /* USBTXP */
	{2, 10, CPM_PIN_INPUT}, /* USBRXN */
	{2, 11, CPM_PIN_INPUT}, /* USBRXP */

	/* Misc */
	{1, 26, CPM_PIN_INPUT}, /* BRGO2 */
	{1, 27, CPM_PIN_INPUT}, /* BRGO1 */
};

static void __init init_ioports(void)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(ep88xc_pins); i++) {
		struct cpm_pin *pin = &ep88xc_pins[i];
		cpm1_set_pin(pin->port, pin->pin, pin->flags);
	}

	cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
	cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_TX); /* USB */
	cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_RX);
	cpm1_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
	cpm1_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
}

static u8 __iomem *ep88xc_bcsr;

#define BCSR7_SCC2_ENABLE 0x10

#define BCSR8_PHY1_ENABLE 0x80
#define BCSR8_PHY1_POWER  0x40
#define BCSR8_PHY2_ENABLE 0x20
#define BCSR8_PHY2_POWER  0x10

#define BCSR9_USB_ENABLE  0x80
#define BCSR9_USB_POWER   0x40
#define BCSR9_USB_HOST    0x20
#define BCSR9_USB_FULL_SPEED_TARGET 0x10

static void __init ep88xc_setup_arch(void)
{
	struct device_node *np;

	cpm_reset();
	init_ioports();

	np = of_find_compatible_node(NULL, NULL, "fsl,ep88xc-bcsr");
	if (!np) {
		printk(KERN_CRIT "Could not find fsl,ep88xc-bcsr node\n");
		return;
	}

	ep88xc_bcsr = of_iomap(np, 0);
	of_node_put(np);

	if (!ep88xc_bcsr) {
		printk(KERN_CRIT "Could not remap BCSR\n");
		return;
	}

	setbits8(&ep88xc_bcsr[7], BCSR7_SCC2_ENABLE);
	setbits8(&ep88xc_bcsr[8], BCSR8_PHY1_ENABLE | BCSR8_PHY1_POWER |
	                          BCSR8_PHY2_ENABLE | BCSR8_PHY2_POWER);
}

static int __init ep88xc_probe(void)
{
	unsigned long root = of_get_flat_dt_root();
	return of_flat_dt_is_compatible(root, "fsl,ep88xc");
}

static struct of_device_id __initdata of_bus_ids[] = {
	{ .name = "soc", },
	{ .name = "cpm", },
	{ .name = "localbus", },
	{},
};

static int __init declare_of_platform_devices(void)
{
	/* Publish the QE devices */
	if (machine_is(ep88xc))
		of_platform_bus_probe(NULL, of_bus_ids, NULL);

	return 0;
}
device_initcall(declare_of_platform_devices);

define_machine(ep88xc) {
	.name = "Embedded Planet EP88xC",
	.probe = ep88xc_probe,
	.setup_arch = ep88xc_setup_arch,
	.init_IRQ = m8xx_pic_init,
	.get_irq	= mpc8xx_get_irq,
	.restart = mpc8xx_restart,
	.calibrate_decr = mpc8xx_calibrate_decr,
	.set_rtc_time = mpc8xx_set_rtc_time,
	.get_rtc_time = mpc8xx_get_rtc_time,
	.progress = udbg_progress,
};