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linux/arch/m68knommu/platform/523x/config.c
Steven King 91d6041721 m68knommu: Coldfire QSPI platform support 
Since Grant has added the coldfire-qspi driver to next-spi, here is the
platform support for the parts that have qspi hardware.  This sets up
gpio to do the spi chip select using the default chip select pins; it should
be trivial for boards that require different or additional spi chip selects to
use other gpios as needed.

Signed-off-by: Steven King <sfking@fdwdc.com>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-05-17 11:04:19 +10:00

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6.6 KiB
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/***************************************************************************/
/*
* linux/arch/m68knommu/platform/523x/config.c
*
* Sub-architcture dependant 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>
/***************************************************************************/
static struct mcf_platform_uart m523x_uart_platform[] = {
{
.mapbase = MCF_MBAR + MCFUART_BASE1,
.irq = MCFINT_VECBASE + MCFINT_UART0,
},
{
.mapbase = MCF_MBAR + MCFUART_BASE2,
.irq = MCFINT_VECBASE + MCFINT_UART0 + 1,
},
{
.mapbase = MCF_MBAR + MCFUART_BASE3,
.irq = MCFINT_VECBASE + MCFINT_UART0 + 2,
},
{ },
};
static struct platform_device m523x_uart = {
.name = "mcfuart",
.id = 0,
.dev.platform_data = m523x_uart_platform,
};
static struct resource m523x_fec_resources[] = {
{
.start = MCF_MBAR + 0x1000,
.end = MCF_MBAR + 0x1000 + 0x7ff,
.flags = IORESOURCE_MEM,
},
{
.start = 64 + 23,
.end = 64 + 23,
.flags = IORESOURCE_IRQ,
},
{
.start = 64 + 27,
.end = 64 + 27,
.flags = IORESOURCE_IRQ,
},
{
.start = 64 + 29,
.end = 64 + 29,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device m523x_fec = {
.name = "fec",
.id = 0,
.num_resources = ARRAY_SIZE(m523x_fec_resources),
.resource = m523x_fec_resources,
};
#if defined(CONFIG_SPI_COLDFIRE_QSPI) || defined(CONFIG_SPI_COLDFIRE_QSPI_MODULE)
static struct resource m523x_qspi_resources[] = {
{
.start = MCFQSPI_IOBASE,
.end = MCFQSPI_IOBASE + MCFQSPI_IOSIZE - 1,
.flags = IORESOURCE_MEM,
},
{
.start = MCFINT_VECBASE + MCFINT_QSPI,
.end = MCFINT_VECBASE + MCFINT_QSPI,
.flags = IORESOURCE_IRQ,
},
};
#define MCFQSPI_CS0 91
#define MCFQSPI_CS1 92
#define MCFQSPI_CS2 103
#define MCFQSPI_CS3 99
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_uart,
&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;
}
/***************************************************************************/
static int __init init_BSP(void)
{
m523x_fec_init();
#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);
/***************************************************************************/
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