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m68knommu: add WilFire and WildfireMod board support
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This patch adds linux-2.6.x kernel support for the Intec Automation
ColdFire 5282-based boards, the WildFire and WildFireMod

Signed-Off-By: Steve Bennett <steveb@workware.net.au>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Steve Bennett authored and Linus Torvalds committed May 1, 2008
1 parent 653620d commit 188a9a4
Showing 1 changed file with 265 additions and 1 deletion.
266 changes: 265 additions & 1 deletion arch/m68knommu/platform/528x/config.c
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Original file line number Diff line number Diff line change
Expand Up @@ -26,9 +26,240 @@
#include <asm/mcfuart.h>
#include <asm/mcfqspi.h>

#ifdef CONFIG_MTD_PARTITIONS
#include <linux/mtd/partitions.h>
#endif

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

void coldfire_reset(void);
static void coldfire_qspi_cs_control(u8 cs, u8 command);

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

#if defined(CONFIG_SPI)

#if defined(CONFIG_WILDFIRE)
#define SPI_NUM_CHIPSELECTS 0x02
#define SPI_PAR_VAL 0x07 /* Enable DIN, DOUT, CLK */
#define SPI_CS_MASK 0x18

#define FLASH_BLOCKSIZE (1024*64)
#define FLASH_NUMBLOCKS 16
#define FLASH_TYPE "m25p80"

#define M25P80_CS 0
#define MMC_CS 1

#ifdef CONFIG_MTD_PARTITIONS
static struct mtd_partition stm25p_partitions[] = {
/* sflash */
[0] = {
.name = "stm25p80",
.offset = 0x00000000,
.size = FLASH_BLOCKSIZE * FLASH_NUMBLOCKS,
.mask_flags = 0
}
};

#endif

#elif defined(CONFIG_WILDFIREMOD)

#define SPI_NUM_CHIPSELECTS 0x08
#define SPI_PAR_VAL 0x07 /* Enable DIN, DOUT, CLK */
#define SPI_CS_MASK 0x78

#define FLASH_BLOCKSIZE (1024*64)
#define FLASH_NUMBLOCKS 64
#define FLASH_TYPE "m25p32"
/* Reserve 1M for the kernel parition */
#define FLASH_KERNEL_SIZE (1024 * 1024)

#define M25P80_CS 5
#define MMC_CS 6

#ifdef CONFIG_MTD_PARTITIONS
static struct mtd_partition stm25p_partitions[] = {
/* sflash */
[0] = {
.name = "kernel",
.offset = FLASH_BLOCKSIZE * FLASH_NUMBLOCKS - FLASH_KERNEL_SIZE,
.size = FLASH_KERNEL_SIZE,
.mask_flags = 0
},
[1] = {
.name = "image",
.offset = 0x00000000,
.size = FLASH_BLOCKSIZE * FLASH_NUMBLOCKS - FLASH_KERNEL_SIZE,
.mask_flags = 0
},
[2] = {
.name = "all",
.offset = 0x00000000,
.size = FLASH_BLOCKSIZE * FLASH_NUMBLOCKS,
.mask_flags = 0
}
};
#endif

#else
#define SPI_NUM_CHIPSELECTS 0x04
#define SPI_PAR_VAL 0x7F /* Enable DIN, DOUT, CLK, CS0 - CS4 */
#endif

#ifdef MMC_CS
static struct coldfire_spi_chip flash_chip_info = {
.mode = SPI_MODE_0,
.bits_per_word = 16,
.del_cs_to_clk = 17,
.del_after_trans = 1,
.void_write_data = 0
};

static struct coldfire_spi_chip mmc_chip_info = {
.mode = SPI_MODE_0,
.bits_per_word = 16,
.del_cs_to_clk = 17,
.del_after_trans = 1,
.void_write_data = 0xFFFF
};
#endif

#ifdef M25P80_CS
static struct flash_platform_data stm25p80_platform_data = {
.name = "ST M25P80 SPI Flash chip",
#ifdef CONFIG_MTD_PARTITIONS
.parts = stm25p_partitions,
.nr_parts = sizeof(stm25p_partitions) / sizeof(*stm25p_partitions),
#endif
.type = FLASH_TYPE
};
#endif

static struct spi_board_info spi_board_info[] __initdata = {
#ifdef M25P80_CS
{
.modalias = "m25p80",
.max_speed_hz = 16000000,
.bus_num = 1,
.chip_select = M25P80_CS,
.platform_data = &stm25p80_platform_data,
.controller_data = &flash_chip_info
},
#endif
#ifdef MMC_CS
{
.modalias = "mmc_spi",
.max_speed_hz = 16000000,
.bus_num = 1,
.chip_select = MMC_CS,
.controller_data = &mmc_chip_info
}
#endif
};

static struct coldfire_spi_master coldfire_master_info = {
.bus_num = 1,
.num_chipselect = SPI_NUM_CHIPSELECTS,
.irq_source = MCF5282_QSPI_IRQ_SOURCE,
.irq_vector = MCF5282_QSPI_IRQ_VECTOR,
.irq_mask = ((0x01 << MCF5282_QSPI_IRQ_SOURCE) | 0x01),
.irq_lp = 0x2B, /* Level 5 and Priority 3 */
.par_val = SPI_PAR_VAL,
.cs_control = coldfire_qspi_cs_control,
};

static struct resource coldfire_spi_resources[] = {
[0] = {
.name = "qspi-par",
.start = MCF5282_QSPI_PAR,
.end = MCF5282_QSPI_PAR,
.flags = IORESOURCE_MEM
},

[1] = {
.name = "qspi-module",
.start = MCF5282_QSPI_QMR,
.end = MCF5282_QSPI_QMR + 0x18,
.flags = IORESOURCE_MEM
},

[2] = {
.name = "qspi-int-level",
.start = MCF5282_INTC0 + MCFINTC_ICR0 + MCF5282_QSPI_IRQ_SOURCE,
.end = MCF5282_INTC0 + MCFINTC_ICR0 + MCF5282_QSPI_IRQ_SOURCE,
.flags = IORESOURCE_MEM
},

[3] = {
.name = "qspi-int-mask",
.start = MCF5282_INTC0 + MCFINTC_IMRL,
.end = MCF5282_INTC0 + MCFINTC_IMRL,
.flags = IORESOURCE_MEM
}
};

static struct platform_device coldfire_spi = {
.name = "spi_coldfire",
.id = -1,
.resource = coldfire_spi_resources,
.num_resources = ARRAY_SIZE(coldfire_spi_resources),
.dev = {
.platform_data = &coldfire_master_info,
}
};

static void coldfire_qspi_cs_control(u8 cs, u8 command)
{
u8 cs_bit = ((0x01 << cs) << 3) & SPI_CS_MASK;

#if defined(CONFIG_WILDFIRE)
u8 cs_mask = ~(((0x01 << cs) << 3) & SPI_CS_MASK);
#endif
#if defined(CONFIG_WILDFIREMOD)
u8 cs_mask = (cs << 3) & SPI_CS_MASK;
#endif

/*
* Don't do anything if the chip select is not
* one of the port qs pins.
*/
if (command & QSPI_CS_INIT) {
#if defined(CONFIG_WILDFIRE)
MCF5282_GPIO_DDRQS |= cs_bit;
MCF5282_GPIO_PQSPAR &= ~cs_bit;
#endif

#if defined(CONFIG_WILDFIREMOD)
MCF5282_GPIO_DDRQS |= SPI_CS_MASK;
MCF5282_GPIO_PQSPAR &= ~SPI_CS_MASK;
#endif
}

if (command & QSPI_CS_ASSERT) {
MCF5282_GPIO_PORTQS &= ~SPI_CS_MASK;
MCF5282_GPIO_PORTQS |= cs_mask;
} else if (command & QSPI_CS_DROP) {
MCF5282_GPIO_PORTQS |= SPI_CS_MASK;
}
}

static int __init spi_dev_init(void)
{
int retval;

retval = platform_device_register(&coldfire_spi);
if (retval < 0)
return retval;

if (ARRAY_SIZE(spi_board_info))
retval = spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));

return retval;
}

#endif /* CONFIG_SPI */

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

Expand Down Expand Up @@ -111,10 +342,43 @@ void mcf_autovector(unsigned int vec)

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

#ifdef CONFIG_WILDFIRE
void wildfire_halt(void)
{
writeb(0, 0x30000007);
writeb(0x2, 0x30000007);
}
#endif

#ifdef CONFIG_WILDFIREMOD
void wildfiremod_halt(void)
{
printk(KERN_INFO "WildFireMod hibernating...\n");

/* Set portE.5 to Digital IO */
MCF5282_GPIO_PEPAR &= ~(1 << (5 * 2));

/* Make portE.5 an output */
MCF5282_GPIO_DDRE |= (1 << 5);

/* Now toggle portE.5 from low to high */
MCF5282_GPIO_PORTE &= ~(1 << 5);
MCF5282_GPIO_PORTE |= (1 << 5);

printk(KERN_EMERG "Failed to hibernate. Halting!\n");
}
#endif

void __init config_BSP(char *commandp, int size)
{
mcf_disableall();
mach_reset = coldfire_reset;

#ifdef CONFIG_WILDFIRE
mach_halt = wildfire_halt;
#endif
#ifdef CONFIG_WILDFIREMOD
mach_halt = wildfiremod_halt;
#endif
}

/***************************************************************************/
Expand Down

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