arch/m68k/platform/523x/config.c

/***************************************************************************/

/*
 *	linux/arch/m68knommu/platform/523x/config.c
 *
 *	Sub-architcture dependent initialization code for the Freescale
 *	523x CPUs.
 *
 *	Copyright (C) 1999-2005, Greg Ungerer (gerg@snapgear.com)
 *	Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
 */

/***************************************************************************/

#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/spi/spi.h>
#include <linux/gpio.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfuart.h>
#include <asm/mcfqspi.h>

/***************************************************************************/

#if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
static struct resource m523x_qspi_resources[] = {
	{
		.start		= MCFQSPI_BASE,
		.end		= MCFQSPI_BASE + MCFQSPI_SIZE - 1,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= MCF_IRQ_QSPI,
		.end		= MCF_IRQ_QSPI,
		.flags		= IORESOURCE_IRQ,
	},
};

static int m523x_cs_setup(struct mcfqspi_cs_control *cs_control)
{
	int status;

	status = gpio_request(MCFQSPI_CS0, "MCFQSPI_CS0");
	if (status) {
		pr_debug("gpio_request for MCFQSPI_CS0 failed\n");
		goto fail0;
	}
	status = gpio_direction_output(MCFQSPI_CS0, 1);
	if (status) {
		pr_debug("gpio_direction_output for MCFQSPI_CS0 failed\n");
		goto fail1;
	}

	status = gpio_request(MCFQSPI_CS1, "MCFQSPI_CS1");
	if (status) {
		pr_debug("gpio_request for MCFQSPI_CS1 failed\n");
		goto fail1;
	}
	status = gpio_direction_output(MCFQSPI_CS1, 1);
	if (status) {
		pr_debug("gpio_direction_output for MCFQSPI_CS1 failed\n");
		goto fail2;
	}

	status = gpio_request(MCFQSPI_CS2, "MCFQSPI_CS2");
	if (status) {
		pr_debug("gpio_request for MCFQSPI_CS2 failed\n");
		goto fail2;
	}
	status = gpio_direction_output(MCFQSPI_CS2, 1);
	if (status) {
		pr_debug("gpio_direction_output for MCFQSPI_CS2 failed\n");
		goto fail3;
	}

	status = gpio_request(MCFQSPI_CS3, "MCFQSPI_CS3");
	if (status) {
		pr_debug("gpio_request for MCFQSPI_CS3 failed\n");
		goto fail3;
	}
	status = gpio_direction_output(MCFQSPI_CS3, 1);
	if (status) {
		pr_debug("gpio_direction_output for MCFQSPI_CS3 failed\n");
		goto fail4;
	}

	return 0;

fail4:
	gpio_free(MCFQSPI_CS3);
fail3:
	gpio_free(MCFQSPI_CS2);
fail2:
	gpio_free(MCFQSPI_CS1);
fail1:
	gpio_free(MCFQSPI_CS0);
fail0:
	return status;
}

static void m523x_cs_teardown(struct mcfqspi_cs_control *cs_control)
{
	gpio_free(MCFQSPI_CS3);
	gpio_free(MCFQSPI_CS2);
	gpio_free(MCFQSPI_CS1);
	gpio_free(MCFQSPI_CS0);
}

static void m523x_cs_select(struct mcfqspi_cs_control *cs_control,
			    u8 chip_select, bool cs_high)
{
	switch (chip_select) {
	case 0:
		gpio_set_value(MCFQSPI_CS0, cs_high);
		break;
	case 1:
		gpio_set_value(MCFQSPI_CS1, cs_high);
		break;
	case 2:
		gpio_set_value(MCFQSPI_CS2, cs_high);
		break;
	case 3:
		gpio_set_value(MCFQSPI_CS3, cs_high);
		break;
	}
}

static void m523x_cs_deselect(struct mcfqspi_cs_control *cs_control,
			      u8 chip_select, bool cs_high)
{
	switch (chip_select) {
	case 0:
		gpio_set_value(MCFQSPI_CS0, !cs_high);
		break;
	case 1:
		gpio_set_value(MCFQSPI_CS1, !cs_high);
		break;
	case 2:
		gpio_set_value(MCFQSPI_CS2, !cs_high);
		break;
	case 3:
		gpio_set_value(MCFQSPI_CS3, !cs_high);
		break;
	}
}

static struct mcfqspi_cs_control m523x_cs_control = {
	.setup                  = m523x_cs_setup,
	.teardown               = m523x_cs_teardown,
	.select                 = m523x_cs_select,
	.deselect               = m523x_cs_deselect,
};

static struct mcfqspi_platform_data m523x_qspi_data = {
	.bus_num		= 0,
	.num_chipselect		= 4,
	.cs_control		= &m523x_cs_control,
};

static struct platform_device m523x_qspi = {
	.name			= "mcfqspi",
	.id			= 0,
	.num_resources		= ARRAY_SIZE(m523x_qspi_resources),
	.resource		= m523x_qspi_resources,
	.dev.platform_data	= &m523x_qspi_data,
};

static void __init m523x_qspi_init(void)
{
	u16 par;

	/* setup QSPS pins for QSPI with gpio CS control */
	writeb(0x1f, MCFGPIO_PAR_QSPI);
	/* and CS2 & CS3 as gpio */
	par = readw(MCFGPIO_PAR_TIMER);
	par &= 0x3f3f;
	writew(par, MCFGPIO_PAR_TIMER);
}
#endif /* defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE) */

static struct platform_device *m523x_devices[] __initdata = {
	&m523x_fec,
#if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
	&m523x_qspi,
#endif
};

/***************************************************************************/

static void __init m523x_fec_init(void)
{
	u16 par;
	u8 v;

	/* Set multi-function pins to ethernet use */
	par = readw(MCF_IPSBAR + 0x100082);
	writew(par | 0xf00, MCF_IPSBAR + 0x100082);
	v = readb(MCF_IPSBAR + 0x100078);
	writeb(v | 0xc0, MCF_IPSBAR + 0x100078);
}

/***************************************************************************/

static void m523x_cpu_reset(void)
{
	local_irq_disable();
	__raw_writeb(MCF_RCR_SWRESET, MCF_IPSBAR + MCF_RCR);
}

/***************************************************************************/

void __init config_BSP(char *commandp, int size)
{
	mach_reset = m523x_cpu_reset;
	mach_sched_init = hw_timer_init;
}

/***************************************************************************/

static int __init init_BSP(void)
{
#if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
	m523x_qspi_init();
#endif
	platform_add_devices(m523x_devices, ARRAY_SIZE(m523x_devices));
	return 0;
}

arch_initcall(init_BSP);

/***************************************************************************/