arch/mips/alchemy/devboards/db1200.c

Source file repositories/reference/linux-study-clean/arch/mips/alchemy/devboards/db1200.c

File Facts

System
Linux kernel
Corpus path
arch/mips/alchemy/devboards/db1200.c
Extension
.c
Size
24721 bytes
Lines
945
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

if (bcsr_read(BCSR_HEXLEDS) != t) {
			bcsr_write(BCSR_HEXLEDS, t);
			return 0;
		}
	}

	/* okay, try the PB1200 then */
	bcsr_init(PB1200_BCSR_PHYS_ADDR,
		  PB1200_BCSR_PHYS_ADDR + PB1200_BCSR_HEXLED_OFS);
	bid = BCSR_WHOAMI_BOARD(bcsr_read(BCSR_WHOAMI));
	if ((bid == BCSR_WHOAMI_PB1200_DDR1) ||
	    (bid == BCSR_WHOAMI_PB1200_DDR2)) {
		unsigned short t = bcsr_read(BCSR_HEXLEDS);
		bcsr_write(BCSR_HEXLEDS, ~t);
		if (bcsr_read(BCSR_HEXLEDS) != t) {
			bcsr_write(BCSR_HEXLEDS, t);
			return 0;
		}
	}

	return 1;	/* it's neither */
}

int __init db1200_board_setup(void)
{
	unsigned short whoami;

	if (db1200_detect_board())
		return -ENODEV;

	whoami = bcsr_read(BCSR_WHOAMI);
	switch (BCSR_WHOAMI_BOARD(whoami)) {
	case BCSR_WHOAMI_PB1200_DDR1:
	case BCSR_WHOAMI_PB1200_DDR2:
	case BCSR_WHOAMI_DB1200:
		break;
	default:
		return -ENODEV;
	}

	printk(KERN_INFO "Alchemy/AMD/RMI %s Board, CPLD Rev %d"
		"  Board-ID %d	Daughtercard ID %d\n", get_system_type(),
		(whoami >> 4) & 0xf, (whoami >> 8) & 0xf, whoami & 0xf);

	return 0;
}

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

static u64 au1200_all_dmamask = DMA_BIT_MASK(32);

static struct mtd_partition db1200_spiflash_parts[] = {
	{
		.name	= "spi_flash",
		.offset = 0,
		.size	= MTDPART_SIZ_FULL,
	},
};

static struct flash_platform_data db1200_spiflash_data = {
	.name		= "s25fl001",
	.parts		= db1200_spiflash_parts,
	.nr_parts	= ARRAY_SIZE(db1200_spiflash_parts),
	.type		= "m25p10",
};

static struct spi_board_info db1200_spi_devs[] __initdata = {
	{
		/* TI TMP121AIDBVR temp sensor */
		.modalias	= "tmp121",
		.max_speed_hz	= 2000000,
		.bus_num	= 0,
		.chip_select	= 0,
		.mode		= 0,
	},
	{
		/* Spansion S25FL001D0FMA SPI flash */
		.modalias	= "m25p80",
		.max_speed_hz	= 50000000,
		.bus_num	= 0,
		.chip_select	= 1,
		.mode		= 0,
		.platform_data	= &db1200_spiflash_data,
	},
};

static struct i2c_board_info db1200_i2c_devs[] __initdata = {
	{ I2C_BOARD_INFO("24c04", 0x52),  }, /* AT24C04-10 I2C eeprom */
	{ I2C_BOARD_INFO("ne1619", 0x2d), }, /* adm1025-compat hwmon */
	{ I2C_BOARD_INFO("wm8731", 0x1b), }, /* I2S audio codec WM8731 */

Annotation

Implementation Notes