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Commit 63323ec5 authored by Manuel Lauss's avatar Manuel Lauss Committed by Ralf Baechle
Browse files

MIPS: Alchemy: Extended DB1200 board support. 



Create own directory for DB1200 code and update it with new features.

- SPI support:
  - tmp121 temperature sensor
  - SPI flash on DB1200
- I2C support
  - NE1619 sensor
  - AT24 eeprom
- I2C/SPI can be selected at boot time via switch S6.8
- Carddetect IRQs for SD cards.
- gen_nand based NAND support.
- hexleds count sleep/wake transitions.

Signed-off-by: default avatarManuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 206aa6cd

arch/mips/alchemy/common/reset.c

+0 −3
Original line number Original line Diff line number Diff line
@@ -164,9 +164,6 @@ void au1000_halt(void) 
#ifdef CONFIG_MIPS_MIRAGE

#ifdef CONFIG_MIPS_MIRAGE

	gpio_direction_output(210, 1);

	gpio_direction_output(210, 1);

#endif

#endif

#ifdef CONFIG_MIPS_DB1200

	au_writew(au_readw(0xB980001C) | (1 << 14), 0xB980001C);

#endif

#ifdef CONFIG_PM

#ifdef CONFIG_PM

	au_sleep();

	au_sleep();

arch/mips/alchemy/devboards/Makefile

+1 −1
Original line number Original line Diff line number Diff line
@@ -11,7 +11,7 @@ obj-$(CONFIG_MIPS_PB1500) += pb1500/ 
obj-$(CONFIG_MIPS_PB1550)	+= pb1550/

obj-$(CONFIG_MIPS_PB1550)	+= pb1550/

obj-$(CONFIG_MIPS_DB1000)	+= db1x00/

obj-$(CONFIG_MIPS_DB1000)	+= db1x00/

obj-$(CONFIG_MIPS_DB1100)	+= db1x00/

obj-$(CONFIG_MIPS_DB1100)	+= db1x00/

obj-$(CONFIG_MIPS_DB1200)	+= pb1200/

obj-$(CONFIG_MIPS_DB1200)	+= db1200/

obj-$(CONFIG_MIPS_DB1500)	+= db1x00/

obj-$(CONFIG_MIPS_DB1500)	+= db1x00/

obj-$(CONFIG_MIPS_DB1550)	+= db1x00/

obj-$(CONFIG_MIPS_DB1550)	+= db1x00/

obj-$(CONFIG_MIPS_BOSPORUS)	+= db1x00/

obj-$(CONFIG_MIPS_BOSPORUS)	+= db1x00/

arch/mips/alchemy/devboards/db1200/Makefile

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Original line number Original line Diff line number Diff line 
obj-y += setup.o platform.o

arch/mips/alchemy/devboards/db1200/platform.c

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Original line number Original line Diff line number Diff line 
/*

 * DBAu1200 board platform device registration

 *

 * Copyright (C) 2008-2009 Manuel Lauss

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */



#include <linux/dma-mapping.h>

#include <linux/gpio.h>

#include <linux/i2c.h>

#include <linux/init.h>

#include <linux/io.h>

#include <linux/leds.h>

#include <linux/mmc/host.h>

#include <linux/mtd/mtd.h>

#include <linux/mtd/nand.h>

#include <linux/mtd/partitions.h>

#include <linux/platform_device.h>

#include <linux/serial_8250.h>

#include <linux/spi/spi.h>

#include <linux/spi/flash.h>

#include <linux/smc91x.h>



#include <asm/mach-au1x00/au1100_mmc.h>

#include <asm/mach-au1x00/au1xxx_dbdma.h>

#include <asm/mach-au1x00/au1550_spi.h>

#include <asm/mach-db1x00/bcsr.h>

#include <asm/mach-db1x00/db1200.h>



#include "../platform.h"



static struct mtd_partition db1200_spiflash_parts[] = {

	{

		.name	= "DB1200 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 = {

	{

		/* AT24C04-10 I2C eeprom */

		I2C_BOARD_INFO("24c04", 0x52),

	},

	{

		/* Philips NE1619 temp/voltage sensor (adm1025 drv) */

		I2C_BOARD_INFO("ne1619", 0x2d),

	},

	{

		/* I2S audio codec WM8731 */

		I2C_BOARD_INFO("wm8731", 0x1b),

	},

};



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



static void au1200_nand_cmd_ctrl(struct mtd_info *mtd, int cmd,

				 unsigned int ctrl)

{

	struct nand_chip *this = mtd->priv;

	unsigned long ioaddr = (unsigned long)this->IO_ADDR_W;



	ioaddr &= 0xffffff00;



	if (ctrl & NAND_CLE) {

		ioaddr += MEM_STNAND_CMD;

	} else if (ctrl & NAND_ALE) {

		ioaddr += MEM_STNAND_ADDR;

	} else {

		/* assume we want to r/w real data  by default */

		ioaddr += MEM_STNAND_DATA;

	}

	this->IO_ADDR_R = this->IO_ADDR_W = (void __iomem *)ioaddr;

	if (cmd != NAND_CMD_NONE) {

		__raw_writeb(cmd, this->IO_ADDR_W);

		wmb();

	}

}



static int au1200_nand_device_ready(struct mtd_info *mtd)

{

	return __raw_readl((void __iomem *)MEM_STSTAT) & 1;

}



static const char *db1200_part_probes[] = { "cmdlinepart", NULL };



static struct mtd_partition db1200_nand_parts[] = {

	{

		.name	= "NAND FS 0",

		.offset	= 0,

		.size	= 8 * 1024 * 1024,

	},

	{

		.name	= "NAND FS 1",

		.offset	= MTDPART_OFS_APPEND,

		.size	= MTDPART_SIZ_FULL

	},

};



struct platform_nand_data db1200_nand_platdata = {

	.chip = {

		.nr_chips	= 1,

		.chip_offset	= 0,

		.nr_partitions	= ARRAY_SIZE(db1200_nand_parts),

		.partitions	= db1200_nand_parts,

		.chip_delay	= 20,

		.part_probe_types = db1200_part_probes,

	},

	.ctrl = {

		.dev_ready	= au1200_nand_device_ready,

		.cmd_ctrl	= au1200_nand_cmd_ctrl,

	},

};



static struct resource db1200_nand_res[] = {

	[0] = {

		.start	= DB1200_NAND_PHYS_ADDR,

		.end	= DB1200_NAND_PHYS_ADDR + 0xff,

		.flags	= IORESOURCE_MEM,

	},

};



static struct platform_device db1200_nand_dev = {

	.name		= "gen_nand",

	.num_resources	= ARRAY_SIZE(db1200_nand_res),

	.resource	= db1200_nand_res,

	.id		= -1,

	.dev		= {

		.platform_data = &db1200_nand_platdata,

	}

};



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



static struct smc91x_platdata db1200_eth_data = {

	.flags	= SMC91X_NOWAIT | SMC91X_USE_16BIT,

	.leda	= RPC_LED_100_10,

	.ledb	= RPC_LED_TX_RX,

};



static struct resource db1200_eth_res[] = {

	[0] = {

		.start	= DB1200_ETH_PHYS_ADDR,

		.end	= DB1200_ETH_PHYS_ADDR + 0xf,

		.flags	= IORESOURCE_MEM,

	},

	[1] = {

		.start	= DB1200_ETH_INT,

		.end	= DB1200_ETH_INT,

		.flags	= IORESOURCE_IRQ,

	},

};



static struct platform_device db1200_eth_dev = {

	.dev	= {

		.platform_data	= &db1200_eth_data,

	},

	.name		= "smc91x",

	.id		= -1,

	.num_resources	= ARRAY_SIZE(db1200_eth_res),

	.resource	= db1200_eth_res,

};



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



static struct resource db1200_ide_res[] = {

	[0] = {

		.start	= DB1200_IDE_PHYS_ADDR,

		.end 	= DB1200_IDE_PHYS_ADDR + DB1200_IDE_PHYS_LEN - 1,

		.flags	= IORESOURCE_MEM,

	},

	[1] = {

		.start	= DB1200_IDE_INT,

		.end	= DB1200_IDE_INT,

		.flags	= IORESOURCE_IRQ,

	}

};



static u64 ide_dmamask = DMA_32BIT_MASK;



static struct platform_device db1200_ide_dev = {

	.name		= "au1200-ide",

	.id		= 0,

	.dev = {

		.dma_mask 		= &ide_dmamask,

		.coherent_dma_mask	= DMA_32BIT_MASK,

	},

	.num_resources	= ARRAY_SIZE(db1200_ide_res),

	.resource	= db1200_ide_res,

};



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



static struct platform_device db1200_rtc_dev = {

	.name	= "rtc-au1xxx",

	.id	= -1,

};



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



/* SD carddetects:  they're supposed to be edge-triggered, but ack

 * doesn't seem to work (CPLD Rev 2).  Instead, the screaming one

 * is disabled and its counterpart enabled.  The 500ms timeout is

 * because the carddetect isn't debounced in hardware.

 */

static irqreturn_t db1200_mmc_cd(int irq, void *ptr)

{

	void(*mmc_cd)(struct mmc_host *, unsigned long);



	if (irq == DB1200_SD0_INSERT_INT) {

		disable_irq_nosync(DB1200_SD0_INSERT_INT);

		enable_irq(DB1200_SD0_EJECT_INT);

	} else {

		disable_irq_nosync(DB1200_SD0_EJECT_INT);

		enable_irq(DB1200_SD0_INSERT_INT);

	}



	/* link against CONFIG_MMC=m */

	mmc_cd = symbol_get(mmc_detect_change);

	if (mmc_cd) {

		mmc_cd(ptr, msecs_to_jiffies(500));

		symbol_put(mmc_detect_change);

	}



	return IRQ_HANDLED;

}



static int db1200_mmc_cd_setup(void *mmc_host, int en)

{

	int ret;



	if (en) {

		ret = request_irq(DB1200_SD0_INSERT_INT, db1200_mmc_cd,

				  IRQF_DISABLED, "sd_insert", mmc_host);

		if (ret)

			goto out;



		ret = request_irq(DB1200_SD0_EJECT_INT, db1200_mmc_cd,

				  IRQF_DISABLED, "sd_eject", mmc_host);

		if (ret) {

			free_irq(DB1200_SD0_INSERT_INT, mmc_host);

			goto out;

		}



		if (bcsr_read(BCSR_SIGSTAT) & BCSR_INT_SD0INSERT)

			enable_irq(DB1200_SD0_EJECT_INT);

		else

			enable_irq(DB1200_SD0_INSERT_INT);



	} else {

		free_irq(DB1200_SD0_INSERT_INT, mmc_host);

		free_irq(DB1200_SD0_EJECT_INT, mmc_host);

	}

	ret = 0;

out:

	return ret;

}



static void db1200_mmc_set_power(void *mmc_host, int state)

{

	if (state) {

		bcsr_mod(BCSR_BOARD, 0, BCSR_BOARD_SD0PWR);

		msleep(400);	/* stabilization time */

	} else

		bcsr_mod(BCSR_BOARD, BCSR_BOARD_SD0PWR, 0);

}



static int db1200_mmc_card_readonly(void *mmc_host)

{

	return (bcsr_read(BCSR_STATUS) & BCSR_STATUS_SD0WP) ? 1 : 0;

}



static int db1200_mmc_card_inserted(void *mmc_host)

{

	return (bcsr_read(BCSR_SIGSTAT) & BCSR_INT_SD0INSERT) ? 1 : 0;

}



static void db1200_mmcled_set(struct led_classdev *led,

			      enum led_brightness brightness)

{

	if (brightness != LED_OFF)

		bcsr_mod(BCSR_LEDS, BCSR_LEDS_LED0, 0);

	else

		bcsr_mod(BCSR_LEDS, 0, BCSR_LEDS_LED0);

}



static struct led_classdev db1200_mmc_led = {

	.brightness_set	= db1200_mmcled_set,

};



/* needed by arch/mips/alchemy/common/platform.c */

struct au1xmmc_platform_data au1xmmc_platdata[] = {

	[0] = {

		.cd_setup	= db1200_mmc_cd_setup,

		.set_power	= db1200_mmc_set_power,

		.card_inserted	= db1200_mmc_card_inserted,

		.card_readonly	= db1200_mmc_card_readonly,

		.led		= &db1200_mmc_led,

	},

};



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



static struct resource au1200_psc0_res[] = {

	[0] = {

		.start	= PSC0_PHYS_ADDR,

		.end	= PSC0_PHYS_ADDR + 0x000fffff,

		.flags	= IORESOURCE_MEM,

	},

	[1] = {

		.start	= AU1200_PSC0_INT,

		.end	= AU1200_PSC0_INT,

		.flags	= IORESOURCE_IRQ,

	},

	[2] = {

		.start	= DSCR_CMD0_PSC0_TX,

		.end	= DSCR_CMD0_PSC0_TX,

		.flags	= IORESOURCE_DMA,

	},

	[3] = {

		.start	= DSCR_CMD0_PSC0_RX,

		.end	= DSCR_CMD0_PSC0_RX,

		.flags	= IORESOURCE_DMA,

	},

};



static struct platform_device db1200_i2c_dev = {

	.name		= "au1xpsc_smbus",

	.id		= 0,	/* bus number */

	.num_resources	= ARRAY_SIZE(au1200_psc0_res),

	.resource	= au1200_psc0_res,

};



static void db1200_spi_cs_en(struct au1550_spi_info *spi, int cs, int pol)

{

	if (cs)

		bcsr_mod(BCSR_RESETS, 0, BCSR_RESETS_SPISEL);

	else

		bcsr_mod(BCSR_RESETS, BCSR_RESETS_SPISEL, 0);

}



static struct au1550_spi_info db1200_spi_platdata = {

	.mainclk_hz	= 50000000,	/* PSC0 clock */

	.num_chipselect = 2,

	.activate_cs	= db1200_spi_cs_en,

};



static u64 spi_dmamask = DMA_32BIT_MASK;



static struct platform_device db1200_spi_dev = {

	.dev	= {

		.dma_mask		= &spi_dmamask,

		.coherent_dma_mask	= DMA_32BIT_MASK,

		.platform_data		= &db1200_spi_platdata,

	},

	.name		= "au1550-spi",

	.id		= 0,	/* bus number */

	.num_resources	= ARRAY_SIZE(au1200_psc0_res),

	.resource	= au1200_psc0_res,

};



static struct platform_device *db1200_devs[] __initdata = {

	NULL,		/* PSC0, selected by S6.8 */

	&db1200_ide_dev,

	&db1200_eth_dev,

	&db1200_rtc_dev,

	&db1200_nand_dev,

};



static int __init db1200_dev_init(void)

{

	unsigned long pfc;

	unsigned short sw;

	int swapped;



	i2c_register_board_info(0, db1200_i2c_devs,

				ARRAY_SIZE(db1200_i2c_devs));

	spi_register_board_info(db1200_spi_devs,

				ARRAY_SIZE(db1200_i2c_devs));



	/* SWITCHES:	S6.8 I2C/SPI selector  (OFF=I2C  ON=SPI)

	 */



	/* NOTE: GPIO215 controls OTG VBUS supply.  In SPI mode however

	 * this pin is claimed by PSC0 (unused though, but pinmux doesn't

	 * allow to free it without crippling the SPI interface).

	 * As a result, in SPI mode, OTG simply won't work (PSC0 uses

	 * it as an input pin which is pulled high on the boards).

	 */

	pfc = __raw_readl((void __iomem *)SYS_PINFUNC) & ~SYS_PINFUNC_P0A;



	/* switch off OTG VBUS supply */

	gpio_request(215, "otg-vbus");

	gpio_direction_output(215, 1);



	printk(KERN_INFO "DB1200 device configuration:\n");



	sw = bcsr_read(BCSR_SWITCHES);

	if (sw & BCSR_SWITCHES_DIP_8) {

		db1200_devs[0] = &db1200_i2c_dev;

		bcsr_mod(BCSR_RESETS, BCSR_RESETS_PSC0MUX, 0);



		pfc |= (2 << 17);	/* GPIO2 block owns GPIO215 */



		printk(KERN_INFO " S6.8 OFF: PSC0 mode I2C\n");

		printk(KERN_INFO "   OTG port VBUS supply available!\n");

	} else {

		db1200_devs[0] = &db1200_spi_dev;

		bcsr_mod(BCSR_RESETS, 0, BCSR_RESETS_PSC0MUX);



		pfc |= (1 << 17);	/* PSC0 owns GPIO215 */



		printk(KERN_INFO " S6.8 ON : PSC0 mode SPI\n");

		printk(KERN_INFO "   OTG port VBUS supply disabled\n");

	}

	__raw_writel(pfc, (void __iomem *)SYS_PINFUNC);

	wmb();



	db1x_register_pcmcia_socket(PCMCIA_ATTR_PSEUDO_PHYS,

				    PCMCIA_ATTR_PSEUDO_PHYS + 0x00040000 - 1,

				    PCMCIA_MEM_PSEUDO_PHYS,

				    PCMCIA_MEM_PSEUDO_PHYS  + 0x00040000 - 1,

				    PCMCIA_IO_PSEUDO_PHYS,

				    PCMCIA_IO_PSEUDO_PHYS   + 0x00001000 - 1,

				    DB1200_PC0_INT,

				    DB1200_PC0_INSERT_INT,

				    /*DB1200_PC0_STSCHG_INT*/0,

				    DB1200_PC0_EJECT_INT,

				    0);



	db1x_register_pcmcia_socket(PCMCIA_ATTR_PSEUDO_PHYS + 0x00400000,

				    PCMCIA_ATTR_PSEUDO_PHYS + 0x00440000 - 1,

				    PCMCIA_MEM_PSEUDO_PHYS  + 0x00400000,

				    PCMCIA_MEM_PSEUDO_PHYS  + 0x00440000 - 1,

				    PCMCIA_IO_PSEUDO_PHYS   + 0x00400000,

				    PCMCIA_IO_PSEUDO_PHYS   + 0x00401000 - 1,

				    DB1200_PC1_INT,

				    DB1200_PC1_INSERT_INT,

				    /*DB1200_PC1_STSCHG_INT*/0,

				    DB1200_PC1_EJECT_INT,

				    1);



	swapped = bcsr_read(BCSR_STATUS) & BCSR_STATUS_DB1200_SWAPBOOT;

	db1x_register_norflash(64 << 20, 2, swapped);



	return platform_add_devices(db1200_devs, ARRAY_SIZE(db1200_devs));

}

device_initcall(db1200_dev_init);



/* au1200fb calls these: STERBT EINEN TRAGISCHEN TOD!!! */

int board_au1200fb_panel(void)

{

	return (bcsr_read(BCSR_SWITCHES) >> 8) & 0x0f;

}



int board_au1200fb_panel_init(void)

{

	/* Apply power */

	bcsr_mod(BCSR_BOARD, 0, BCSR_BOARD_LCDVEE | BCSR_BOARD_LCDVDD |

				BCSR_BOARD_LCDBL);

	return 0;

}



int board_au1200fb_panel_shutdown(void)

{

	/* Remove power */

	bcsr_mod(BCSR_BOARD, BCSR_BOARD_LCDVEE | BCSR_BOARD_LCDVDD |

			     BCSR_BOARD_LCDBL, 0);

	return 0;

}

arch/mips/alchemy/devboards/db1200/setup.c

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/*

 * Alchemy/AMD/RMI DB1200 board setup.

 *

 * Licensed under the terms outlined in the file COPYING in the root of

 * this source archive.

 */



#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/kernel.h>

#include <linux/pm.h>

#include <asm/mach-au1x00/au1000.h>

#include <asm/mach-db1x00/bcsr.h>

#include <asm/mach-db1x00/db1200.h>

#include <asm/processor.h>

#include <asm/reboot.h>



const char *get_system_type(void)

{

	return "Alchemy Db1200";

}



static void board_power_off(void)

{

	bcsr_write(BCSR_RESETS, 0);

	bcsr_write(BCSR_SYSTEM, BCSR_SYSTEM_PWROFF | BCSR_SYSTEM_RESET);

}



void board_reset(void)

{

	bcsr_write(BCSR_RESETS, 0);

	bcsr_write(BCSR_SYSTEM, 0);

}



void __init board_setup(void)

{

	unsigned long freq0, clksrc, div, pfc;

	unsigned short whoami;



	bcsr_init(DB1200_BCSR_PHYS_ADDR,

		  DB1200_BCSR_PHYS_ADDR + DB1200_BCSR_HEXLED_OFS);



	whoami = bcsr_read(BCSR_WHOAMI);

	printk(KERN_INFO "Alchemy/AMD/RMI DB1200 Board, CPLD Rev %d"

		"  Board-ID %d  Daughtercard ID %d\n",

		(whoami >> 4) & 0xf, (whoami >> 8) & 0xf, whoami & 0xf);



	/* SMBus/SPI on PSC0, Audio on PSC1 */

	pfc = __raw_readl((void __iomem *)SYS_PINFUNC);

	pfc &= ~(SYS_PINFUNC_P0A | SYS_PINFUNC_P0B);

	pfc &= ~(SYS_PINFUNC_P1A | SYS_PINFUNC_P1B | SYS_PINFUNC_FS3);

	pfc |= SYS_PINFUNC_P1C;	/* SPI is configured later */

	__raw_writel(pfc, (void __iomem *)SYS_PINFUNC);

	wmb();



	/* Clock configurations: PSC0: ~50MHz via Clkgen0, derived from

	 * CPU clock; all other clock generators off/unused.

	 */

	div = (get_au1x00_speed() + 25000000) / 50000000;

	if (div & 1)

		div++;

	div = ((div >> 1) - 1) & 0xff;



	freq0 = div << SYS_FC_FRDIV0_BIT;

	__raw_writel(freq0, (void __iomem *)SYS_FREQCTRL0);

	wmb();

	freq0 |= SYS_FC_FE0;	/* enable F0 */

	__raw_writel(freq0, (void __iomem *)SYS_FREQCTRL0);

	wmb();



	/* psc0_intclk comes 1:1 from F0 */

	clksrc = SYS_CS_MUX_FQ0 << SYS_CS_ME0_BIT;

	__raw_writel(clksrc, (void __iomem *)SYS_CLKSRC);

	wmb();



	pm_power_off = board_power_off;

	_machine_halt = board_power_off;

	_machine_restart = (void(*)(char *))board_reset;

}



/* use the hexleds to count the number of times the cpu has entered

 * wait, the dots to indicate whether the CPU is currently idle or

 * active (dots off = sleeping, dots on = working) for cases where

 * the number doesn't change for a long(er) period of time.

 */

static void db1200_wait(void)

{

	__asm__("	.set	push			\n"

		"	.set	mips3			\n"

		"	.set	noreorder		\n"

		"	cache	0x14, 0(%0)		\n"

		"	cache	0x14, 32(%0)		\n"

		"	cache	0x14, 64(%0)		\n"

		/* dots off: we're about to call wait */

		"	lui	$26, 0xb980		\n"

		"	ori	$27, $0, 3		\n"

		"	sb	$27, 0x18($26)		\n"

		"	sync				\n"

		"	nop				\n"

		"	wait				\n"

		"	nop				\n"

		"	nop				\n"

		"	nop				\n"

		"	nop				\n"

		"	nop				\n"

		/* dots on: there's work to do, increment cntr */

		"	lui	$26, 0xb980		\n"

		"	sb	$0, 0x18($26)		\n"

		"	lui	$26, 0xb9c0		\n"

		"	lb	$27, 0($26)		\n"

		"	addiu	$27, $27, 1		\n"

		"	sb	$27, 0($26)		\n"

		"	sync				\n"

		"	.set	pop			\n"

		: : "r" (db1200_wait));

}



static int __init db1200_arch_init(void)

{

	/* GPIO7 is low-level triggered CPLD cascade */

	set_irq_type(AU1200_GPIO7_INT, IRQF_TRIGGER_LOW);

	bcsr_init_irq(DB1200_INT_BEGIN, DB1200_INT_END, AU1200_GPIO7_INT);



	/* do not autoenable these: CPLD has broken edge int handling,

	 * and the CD handler setup requires manual enabling to work

	 * around that.

	 */

	irq_to_desc(DB1200_SD0_INSERT_INT)->status |= IRQ_NOAUTOEN;

	irq_to_desc(DB1200_SD0_EJECT_INT)->status |= IRQ_NOAUTOEN;



	if (cpu_wait)

		cpu_wait = db1200_wait;



	return 0;

}

arch_initcall(db1200_arch_init);