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acrn-kernel/arch/m68knommu/platform/528x/config.c

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/***************************************************************************/
/*
* linux/arch/m68knommu/platform/528x/config.c
*
* Sub-architcture dependant initialization code for the Motorola
* 5280 and 5282 CPUs.
*
* Copyright (C) 1999-2003, 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/interrupt.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/flash.h>
#include <linux/io.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#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 */
/***************************************************************************/
static struct mcf_platform_uart m528x_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 m528x_uart = {
.name = "mcfuart",
.id = 0,
.dev.platform_data = m528x_uart_platform,
};
static struct platform_device *m528x_devices[] __initdata = {
&m528x_uart,
};
/***************************************************************************/
#define INTC0 (MCF_MBAR + MCFICM_INTC0)
static void __init m528x_uart_init_line(int line, int irq)
{
u8 port;
u32 imr;
if ((line < 0) || (line > 2))
return;
/* level 6, line based priority */
writeb(0x30+line, INTC0 + MCFINTC_ICR0 + MCFINT_UART0 + line);
imr = readl(INTC0 + MCFINTC_IMRL);
imr &= ~((1 << (irq - MCFINT_VECBASE)) | 1);
writel(imr, INTC0 + MCFINTC_IMRL);
/* make sure PUAPAR is set for UART0 and UART1 */
if (line < 2) {
port = readb(MCF_MBAR + MCF5282_GPIO_PUAPAR);
port |= (0x03 << (line * 2));
writeb(port, MCF_MBAR + MCF5282_GPIO_PUAPAR);
}
}
static void __init m528x_uarts_init(void)
{
const int nrlines = ARRAY_SIZE(m528x_uart_platform);
int line;
for (line = 0; (line < nrlines); line++)
m528x_uart_init_line(line, m528x_uart_platform[line].irq);
}
/***************************************************************************/
void mcf_disableall(void)
{
*((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRH)) = 0xffffffff;
*((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRL)) = 0xffffffff;
}
/***************************************************************************/
void mcf_autovector(unsigned int vec)
{
/* Everything is auto-vectored on the 5272 */
}
/***************************************************************************/
#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();
#ifdef CONFIG_WILDFIRE
mach_halt = wildfire_halt;
#endif
#ifdef CONFIG_WILDFIREMOD
mach_halt = wildfiremod_halt;
#endif
}
/***************************************************************************/
static int __init init_BSP(void)
{
m528x_uarts_init();
platform_add_devices(m528x_devices, ARRAY_SIZE(m528x_devices));
return 0;
}
arch_initcall(init_BSP);
/***************************************************************************/
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