src/kernel/linux/v4.19/arch/arm/mach-sa1100/assabet.c - T800 - Gitiles

 /*
  * linux/arch/arm/mach-sa1100/assabet.c
  *
  * Author: Nicolas Pitre
  *
  * This file contains all Assabet-specific tweaks.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/gpio/gpio-reg.h>
 #include <linux/gpio/machine.h>
 #include <linux/ioport.h>
 #include <linux/platform_data/sa11x0-serial.h>
 #include <linux/regulator/fixed.h>
 #include <linux/regulator/machine.h>
 #include <linux/serial_core.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/ucb1x00.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/delay.h>
 #include <linux/mm.h>
 #include <linux/leds.h>
 #include <linux/slab.h>

 #include <video/sa1100fb.h>

 #include <mach/hardware.h>
 #include <asm/mach-types.h>
 #include <asm/setup.h>
 #include <asm/page.h>
 #include <asm/pgtable-hwdef.h>
 #include <asm/pgtable.h>
 #include <asm/tlbflush.h>

 #include <asm/mach/arch.h>
 #include <asm/mach/flash.h>
 #include <linux/platform_data/irda-sa11x0.h>
 #include <asm/mach/map.h>
 #include <mach/assabet.h>
 #include <linux/platform_data/mfd-mcp-sa11x0.h>
 #include <mach/irqs.h>

 #include "generic.h"

 #define ASSABET_BCR_DB1110 \
 	(ASSABET_BCR_SPK_OFF    | \
 	 ASSABET_BCR_LED_GREEN  | ASSABET_BCR_LED_RED   | \
 	 ASSABET_BCR_RS232EN    | ASSABET_BCR_LCD_12RGB | \
 	 ASSABET_BCR_IRDA_MD0)

 #define ASSABET_BCR_DB1111 \
 	(ASSABET_BCR_SPK_OFF    | \
 	 ASSABET_BCR_LED_GREEN  | ASSABET_BCR_LED_RED   | \
 	 ASSABET_BCR_RS232EN    | ASSABET_BCR_LCD_12RGB | \
 	 ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_STEREO_LB | \
 	 ASSABET_BCR_IRDA_MD0   | ASSABET_BCR_CF_RST)

 unsigned long SCR_value = ASSABET_SCR_INIT;
 EXPORT_SYMBOL(SCR_value);

 static struct gpio_chip *assabet_bcr_gc;

 static const char *assabet_names[] = {
 	"cf_pwr", "cf_gfx_reset", "nsoft_reset", "irda_fsel",
 	"irda_md0", "irda_md1", "stereo_loopback", "ncf_bus_on",
 	"audio_pwr_on", "light_pwr_on", "lcd16data", "lcd_pwr_on",
 	"rs232_on", "nred_led", "ngreen_led", "vib_on",
 	"com_dtr", "com_rts", "radio_wake_mod", "i2c_enab",
 	"tvir_enab", "qmute", "radio_pwr_on", "spkr_off",
 	"rs232_valid", "com_dcd", "com_cts", "com_dsr",
 	"radio_cts", "radio_dsr", "radio_dcd", "radio_ri",
 };

 /* The old deprecated interface */
 void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
 {
 	unsigned long m = mask, v = val;

 	assabet_bcr_gc->set_multiple(assabet_bcr_gc, &m, &v);
 }
 EXPORT_SYMBOL(ASSABET_BCR_frob);

 static int __init assabet_init_gpio(void __iomem *reg, u32 def_val)
 {
 	struct gpio_chip *gc;

 	writel_relaxed(def_val, reg);

 	gc = gpio_reg_init(NULL, reg, -1, 32, "assabet", 0xff000000, def_val,
 			   assabet_names, NULL, NULL);

 	if (IS_ERR(gc))
 		return PTR_ERR(gc);

 	assabet_bcr_gc = gc;

 	return gc->base;
 }

 /*
  * The codec reset goes to three devices, so we need to release
  * the rest when any one of these requests it.  However, that
  * causes the ADV7171 to consume around 100mA - more than half
  * the LCD-blanked power.
  *
  * With the ADV7171, LCD and backlight enabled, we go over
  * budget on the MAX846 Li-Ion charger, and if no Li-Ion battery
  * is connected, the Assabet crashes.
  */
 #define RST_UCB1X00 (1 << 0)
 #define RST_UDA1341 (1 << 1)
 #define RST_ADV7171 (1 << 2)

 #define SDA GPIO_GPIO(15)
 #define SCK GPIO_GPIO(18)
 #define MOD GPIO_GPIO(17)

 static void adv7171_start(void)
 {
 	GPSR = SCK;
 	udelay(1);
 	GPSR = SDA;
 	udelay(2);
 	GPCR = SDA;
 }

 static void adv7171_stop(void)
 {
 	GPSR = SCK;
 	udelay(2);
 	GPSR = SDA;
 	udelay(1);
 }

 static void adv7171_send(unsigned byte)
 {
 	unsigned i;

 	for (i = 0; i < 8; i++, byte <<= 1) {
 		GPCR = SCK;
 		udelay(1);
 		if (byte & 0x80)
 			GPSR = SDA;
 		else
 			GPCR = SDA;
 		udelay(1);
 		GPSR = SCK;
 		udelay(1);
 	}
 	GPCR = SCK;
 	udelay(1);
 	GPSR = SDA;
 	udelay(1);
 	GPDR &= ~SDA;
 	GPSR = SCK;
 	udelay(1);
 	if (GPLR & SDA)
 		printk(KERN_WARNING "No ACK from ADV7171\n");
 	udelay(1);
 	GPCR = SCK | SDA;
 	udelay(1);
 	GPDR |= SDA;
 	udelay(1);
 }

 static void adv7171_write(unsigned reg, unsigned val)
 {
 	unsigned gpdr = GPDR;
 	unsigned gplr = GPLR;

 	ASSABET_BCR_frob(ASSABET_BCR_AUDIO_ON, ASSABET_BCR_AUDIO_ON);
 	udelay(100);

 	GPCR = SDA | SCK | MOD; /* clear L3 mode to ensure UDA1341 doesn't respond */
 	GPDR = (GPDR | SCK | MOD) & ~SDA;
 	udelay(10);
 	if (!(GPLR & SDA))
 		printk(KERN_WARNING "Something dragging SDA down?\n");
 	GPDR |= SDA;

 	adv7171_start();
 	adv7171_send(0x54);
 	adv7171_send(reg);
 	adv7171_send(val);
 	adv7171_stop();

 	/* Restore GPIO state for L3 bus */
 	GPSR = gplr & (SDA | SCK | MOD);
 	GPCR = (~gplr) & (SDA | SCK | MOD);
 	GPDR = gpdr;
 }

 static void adv7171_sleep(void)
 {
 	/* Put the ADV7171 into sleep mode */
 	adv7171_write(0x04, 0x40);
 }

 static unsigned codec_nreset;

 static void assabet_codec_reset(unsigned mask, int set)
 {
 	unsigned long flags;
 	bool old;

 	local_irq_save(flags);
 	old = !codec_nreset;
 	if (set)
 		codec_nreset &= ~mask;
 	else
 		codec_nreset |= mask;

 	if (old != !codec_nreset) {
 		if (codec_nreset) {
 			ASSABET_BCR_set(ASSABET_BCR_NCODEC_RST);
 			adv7171_sleep();
 		} else {
 			ASSABET_BCR_clear(ASSABET_BCR_NCODEC_RST);
 		}
 	}
 	local_irq_restore(flags);
 }

 static void assabet_ucb1x00_reset(enum ucb1x00_reset state)
 {
 	int set = state == UCB_RST_REMOVE || state == UCB_RST_SUSPEND ||
 		state == UCB_RST_PROBE_FAIL;
 	assabet_codec_reset(RST_UCB1X00, set);
 }

 void assabet_uda1341_reset(int set)
 {
 	assabet_codec_reset(RST_UDA1341, set);
 }
 EXPORT_SYMBOL(assabet_uda1341_reset);


 /*
  * Assabet flash support code.
  */

 #ifdef ASSABET_REV_4
 /*
  * Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
  */
 static struct mtd_partition assabet_partitions[] = {
 	{
 		.name		= "bootloader",
 		.size		= 0x00020000,
 		.offset		= 0,
 		.mask_flags	= MTD_WRITEABLE,
 	}, {
 		.name		= "bootloader params",
 		.size		= 0x00020000,
 		.offset		= MTDPART_OFS_APPEND,
 		.mask_flags	= MTD_WRITEABLE,
 	}, {
 		.name		= "jffs",
 		.size		= MTDPART_SIZ_FULL,
 		.offset		= MTDPART_OFS_APPEND,
 	}
 };
 #else
 /*
  * Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
  */
 static struct mtd_partition assabet_partitions[] = {
 	{
 		.name		= "bootloader",
 		.size		= 0x00040000,
 		.offset		= 0,
 		.mask_flags	= MTD_WRITEABLE,
 	}, {
 		.name		= "bootloader params",
 		.size		= 0x00040000,
 		.offset		= MTDPART_OFS_APPEND,
 		.mask_flags	= MTD_WRITEABLE,
 	}, {
 		.name		= "jffs",
 		.size		= MTDPART_SIZ_FULL,
 		.offset		= MTDPART_OFS_APPEND,
 	}
 };
 #endif

 static struct flash_platform_data assabet_flash_data = {
 	.map_name	= "cfi_probe",
 	.parts		= assabet_partitions,
 	.nr_parts	= ARRAY_SIZE(assabet_partitions),
 };

 static struct resource assabet_flash_resources[] = {
 	DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M),
 	DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_32M),
 };


 /*
  * Assabet IrDA support code.
  */

 static int assabet_irda_set_power(struct device *dev, unsigned int state)
 {
 	static unsigned int bcr_state[4] = {
 		ASSABET_BCR_IRDA_MD0,
 		ASSABET_BCR_IRDA_MD1|ASSABET_BCR_IRDA_MD0,
 		ASSABET_BCR_IRDA_MD1,
 		0
 	};

 	if (state < 4)
 		ASSABET_BCR_frob(ASSABET_BCR_IRDA_MD1 | ASSABET_BCR_IRDA_MD0,
 				 bcr_state[state]);
 	return 0;
 }

 static void assabet_irda_set_speed(struct device *dev, unsigned int speed)
 {
 	if (speed < 4000000)
 		ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL);
 	else
 		ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL);
 }

 static struct irda_platform_data assabet_irda_data = {
 	.set_power	= assabet_irda_set_power,
 	.set_speed	= assabet_irda_set_speed,
 };

 static struct ucb1x00_plat_data assabet_ucb1x00_data = {
 	.reset		= assabet_ucb1x00_reset,
 	.gpio_base	= -1,
 	.can_wakeup	= 1,
 };

 static struct mcp_plat_data assabet_mcp_data = {
 	.mccr0		= MCCR0_ADM,
 	.sclk_rate	= 11981000,
 	.codec_pdata	= &assabet_ucb1x00_data,
 };

 static void assabet_lcd_set_visual(u32 visual)
 {
 	u_int is_true_color = visual == FB_VISUAL_TRUECOLOR;

 	if (machine_is_assabet()) {
 #if 1		// phase 4 or newer Assabet's
 		if (is_true_color)
 			ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
 		else
 			ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
 #else
 		// older Assabet's
 		if (is_true_color)
 			ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
 		else
 			ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
 #endif
 	}
 }

 #ifndef ASSABET_PAL_VIDEO
 static void assabet_lcd_backlight_power(int on)
 {
 	if (on)
 		ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
 	else
 		ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
 }

 /*
  * Turn on/off the backlight.  When turning the backlight on, we wait
  * 500us after turning it on so we don't cause the supplies to droop
  * when we enable the LCD controller (and cause a hard reset.)
  */
 static void assabet_lcd_power(int on)
 {
 	if (on) {
 		ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
 		udelay(500);
 	} else
 		ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
 }

 /*
  * The assabet uses a sharp LQ039Q2DS54 LCD module.  It is actually
  * takes an RGB666 signal, but we provide it with an RGB565 signal
  * instead (def_rgb_16).
  */
 static struct sa1100fb_mach_info lq039q2ds54_info = {
 	.pixclock	= 171521,	.bpp		= 16,
 	.xres		= 320,		.yres		= 240,

 	.hsync_len	= 5,		.vsync_len	= 1,
 	.left_margin	= 61,		.upper_margin	= 3,
 	.right_margin	= 9,		.lower_margin	= 0,

 	.sync		= FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,

 	.lccr0		= LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
 	.lccr3		= LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2),

 	.backlight_power = assabet_lcd_backlight_power,
 	.lcd_power = assabet_lcd_power,
 	.set_visual = assabet_lcd_set_visual,
 };
 #else
 static void assabet_pal_backlight_power(int on)
 {
 	ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
 }

 static void assabet_pal_power(int on)
 {
 	ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
 }

 static struct sa1100fb_mach_info pal_info = {
 	.pixclock	= 67797,	.bpp		= 16,
 	.xres		= 640,		.yres		= 512,

 	.hsync_len	= 64,		.vsync_len	= 6,
 	.left_margin	= 125,		.upper_margin	= 70,
 	.right_margin	= 115,		.lower_margin	= 36,

 	.lccr0		= LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
 	.lccr3		= LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512),

 	.backlight_power = assabet_pal_backlight_power,
 	.lcd_power = assabet_pal_power,
 	.set_visual = assabet_lcd_set_visual,
 };
 #endif

 #ifdef CONFIG_ASSABET_NEPONSET
 static struct resource neponset_resources[] = {
 	DEFINE_RES_MEM(0x10000000, 0x08000000),
 	DEFINE_RES_MEM(0x18000000, 0x04000000),
 	DEFINE_RES_MEM(0x40000000, SZ_8K),
 	DEFINE_RES_IRQ(IRQ_GPIO25),
 };
 #endif

 static struct gpiod_lookup_table assabet_cf_gpio_table = {
 	.dev_id = "sa11x0-pcmcia.1",
 	.table = {
 		GPIO_LOOKUP("gpio", 21, "ready", GPIO_ACTIVE_HIGH),
 		GPIO_LOOKUP("gpio", 22, "detect", GPIO_ACTIVE_LOW),
 		GPIO_LOOKUP("gpio", 24, "bvd2", GPIO_ACTIVE_HIGH),
 		GPIO_LOOKUP("gpio", 25, "bvd1", GPIO_ACTIVE_HIGH),
 		GPIO_LOOKUP("assabet", 1, "reset", GPIO_ACTIVE_HIGH),
 		GPIO_LOOKUP("assabet", 7, "bus-enable", GPIO_ACTIVE_LOW),
 		{ },
 	},
 };

 static struct regulator_consumer_supply assabet_cf_vcc_consumers[] = {
 	REGULATOR_SUPPLY("vcc", "sa11x0-pcmcia.1"),
 };

 static struct fixed_voltage_config assabet_cf_vcc_pdata __initdata = {
 	.supply_name = "cf-power",
 	.microvolts = 3300000,
 	.enable_high = 1,
 };

 static void __init assabet_init(void)
 {
 	/*
 	 * Ensure that the power supply is in "high power" mode.
 	 */
 	GPSR = GPIO_GPIO16;
 	GPDR |= GPIO_GPIO16;

 	/*
 	 * Ensure that these pins are set as outputs and are driving
 	 * logic 0.  This ensures that we won't inadvertently toggle
 	 * the WS latch in the CPLD, and we don't float causing
 	 * excessive power drain.  --rmk
 	 */
 	GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;
 	GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM;

 	/*
 	 * Also set GPIO27 as an output; this is used to clock UART3
 	 * via the FPGA and as otherwise has no pullups or pulldowns,
 	 * so stop it floating.
 	 */
 	GPCR = GPIO_GPIO27;
 	GPDR |= GPIO_GPIO27;

 	/*
 	 * Set up registers for sleep mode.
 	 */
 	PWER = PWER_GPIO0;
 	PGSR = 0;
 	PCFR = 0;
 	PSDR = 0;
 	PPDR |= PPC_TXD3 | PPC_TXD1;
 	PPSR |= PPC_TXD3 | PPC_TXD1;

 	sa11x0_ppc_configure_mcp();

 	if (machine_has_neponset()) {
 #ifndef CONFIG_ASSABET_NEPONSET
 		printk( "Warning: Neponset detected but full support "
 			"hasn't been configured in the kernel\n" );
 #else
 		platform_device_register_simple("neponset", 0,
 			neponset_resources, ARRAY_SIZE(neponset_resources));
 #endif
 	} else {
 		sa11x0_register_fixed_regulator(0, &assabet_cf_vcc_pdata,
 					 assabet_cf_vcc_consumers,
 					 ARRAY_SIZE(assabet_cf_vcc_consumers));

 	}

 #ifndef ASSABET_PAL_VIDEO
 	sa11x0_register_lcd(&lq039q2ds54_info);
 #else
 	sa11x0_register_lcd(&pal_video);
 #endif
 	sa11x0_register_mtd(&assabet_flash_data, assabet_flash_resources,
 			    ARRAY_SIZE(assabet_flash_resources));
 	sa11x0_register_irda(&assabet_irda_data);
 	sa11x0_register_mcp(&assabet_mcp_data);

 	if (!machine_has_neponset())
 		sa11x0_register_pcmcia(1, &assabet_cf_gpio_table);
 }

 /*
  * On Assabet, we must probe for the Neponset board _before_
  * paging_init() has occurred to actually determine the amount
  * of RAM available.  To do so, we map the appropriate IO section
  * in the page table here in order to access GPIO registers.
  */
 static void __init map_sa1100_gpio_regs( void )
 {
 	unsigned long phys = __PREG(GPLR) & PMD_MASK;
 	unsigned long virt = (unsigned long)io_p2v(phys);
 	int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO);
 	pmd_t *pmd;

 	pmd = pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt);
 	*pmd = __pmd(phys | prot);
 	flush_pmd_entry(pmd);
 }

 /*
  * Read System Configuration "Register"
  * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
  * User's Guide", section 4.4.1)
  *
  * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
  * to set up the serial port for decompression status messages. We
  * repeat it here because the kernel may not be loaded as a zImage, and
  * also because it's a hassle to communicate the SCR value to the kernel
  * from the decompressor.
  *
  * Note that IRQs are guaranteed to be disabled.
  */
 static void __init get_assabet_scr(void)
 {
 	unsigned long uninitialized_var(scr), i;

 	GPDR |= 0x3fc;			/* Configure GPIO 9:2 as outputs */
 	GPSR = 0x3fc;			/* Write 0xFF to GPIO 9:2 */
 	GPDR &= ~(0x3fc);		/* Configure GPIO 9:2 as inputs */
 	for(i = 100; i--; )		/* Read GPIO 9:2 */
 		scr = GPLR;
 	GPDR |= 0x3fc;			/*  restore correct pin direction */
 	scr &= 0x3fc;			/* save as system configuration byte. */
 	SCR_value = scr;
 }

 static void __init
 fixup_assabet(struct tag *tags, char **cmdline)
 {
 	/* This must be done before any call to machine_has_neponset() */
 	map_sa1100_gpio_regs();
 	get_assabet_scr();

 	if (machine_has_neponset())
 		printk("Neponset expansion board detected\n");
 }


 static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
 {
 	if (port->mapbase == _Ser1UTCR0) {
 		if (state)
 			ASSABET_BCR_clear(ASSABET_BCR_RS232EN |
 					  ASSABET_BCR_COM_RTS |
 					  ASSABET_BCR_COM_DTR);
 		else
 			ASSABET_BCR_set(ASSABET_BCR_RS232EN |
 					ASSABET_BCR_COM_RTS |
 					ASSABET_BCR_COM_DTR);
 	}
 }

 /*
  * Assabet uses COM_RTS and COM_DTR for both UART1 (com port)
  * and UART3 (radio module).  We only handle them for UART1 here.
  */
 static void assabet_set_mctrl(struct uart_port *port, u_int mctrl)
 {
 	if (port->mapbase == _Ser1UTCR0) {
 		u_int set = 0, clear = 0;

 		if (mctrl & TIOCM_RTS)
 			clear |= ASSABET_BCR_COM_RTS;
 		else
 			set |= ASSABET_BCR_COM_RTS;

 		if (mctrl & TIOCM_DTR)
 			clear |= ASSABET_BCR_COM_DTR;
 		else
 			set |= ASSABET_BCR_COM_DTR;

 		ASSABET_BCR_clear(clear);
 		ASSABET_BCR_set(set);
 	}
 }

 static u_int assabet_get_mctrl(struct uart_port *port)
 {
 	u_int ret = 0;
 	u_int bsr = ASSABET_BSR;

 	/* need 2 reads to read current value */
 	bsr = ASSABET_BSR;

 	if (port->mapbase == _Ser1UTCR0) {
 		if (bsr & ASSABET_BSR_COM_DCD)
 			ret |= TIOCM_CD;
 		if (bsr & ASSABET_BSR_COM_CTS)
 			ret |= TIOCM_CTS;
 		if (bsr & ASSABET_BSR_COM_DSR)
 			ret |= TIOCM_DSR;
 	} else if (port->mapbase == _Ser3UTCR0) {
 		if (bsr & ASSABET_BSR_RAD_DCD)
 			ret |= TIOCM_CD;
 		if (bsr & ASSABET_BSR_RAD_CTS)
 			ret |= TIOCM_CTS;
 		if (bsr & ASSABET_BSR_RAD_DSR)
 			ret |= TIOCM_DSR;
 		if (bsr & ASSABET_BSR_RAD_RI)
 			ret |= TIOCM_RI;
 	} else {
 		ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;
 	}

 	return ret;
 }

 static struct sa1100_port_fns assabet_port_fns __initdata = {
 	.set_mctrl	= assabet_set_mctrl,
 	.get_mctrl	= assabet_get_mctrl,
 	.pm		= assabet_uart_pm,
 };

 static struct map_desc assabet_io_desc[] __initdata = {
   	{	/* Board Control Register */
 		.virtual	=  0xf1000000,
 		.pfn		= __phys_to_pfn(0x12000000),
 		.length		= 0x00100000,
 		.type		= MT_DEVICE
 	}, {	/* MQ200 */
 		.virtual	=  0xf2800000,
 		.pfn		= __phys_to_pfn(0x4b800000),
 		.length		= 0x00800000,
 		.type		= MT_DEVICE
 	}
 };

 static void __init assabet_map_io(void)
 {
 	sa1100_map_io();
 	iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));

 	/*
 	 * Set SUS bit in SDCR0 so serial port 1 functions.
 	 * Its called GPCLKR0 in my SA1110 manual.
 	 */
 	Ser1SDCR0 |= SDCR0_SUS;
 	MSC1 = (MSC1 & ~0xffff) |
 		MSC_NonBrst | MSC_32BitStMem |
 		MSC_RdAcc(2) | MSC_WrAcc(2) | MSC_Rec(0);

 	if (!machine_has_neponset())
 		sa1100_register_uart_fns(&assabet_port_fns);

 	/*
 	 * When Neponset is attached, the first UART should be
 	 * UART3.  That's what Angel is doing and many documents
 	 * are stating this.
 	 *
 	 * We do the Neponset mapping even if Neponset support
 	 * isn't compiled in so the user will still get something on
 	 * the expected physical serial port.
 	 *
 	 * We no longer do this; not all boot loaders support it,
 	 * and UART3 appears to be somewhat unreliable with blob.
 	 */
 	sa1100_register_uart(0, 1);
 	sa1100_register_uart(2, 3);
 }

 /* LEDs */
 #if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
 struct assabet_led {
 	struct led_classdev cdev;
 	u32 mask;
 };

 /*
  * The triggers lines up below will only be used if the
  * LED triggers are compiled in.
  */
 static const struct {
 	const char *name;
 	const char *trigger;
 } assabet_leds[] = {
 	{ "assabet:red", "cpu0",},
 	{ "assabet:green", "heartbeat", },
 };

 /*
  * The LED control in Assabet is reversed:
  *  - setting bit means turn off LED
  *  - clearing bit means turn on LED
  */
 static void assabet_led_set(struct led_classdev *cdev,
 		enum led_brightness b)
 {
 	struct assabet_led *led = container_of(cdev,
 			struct assabet_led, cdev);

 	if (b != LED_OFF)
 		ASSABET_BCR_clear(led->mask);
 	else
 		ASSABET_BCR_set(led->mask);
 }

 static enum led_brightness assabet_led_get(struct led_classdev *cdev)
 {
 	struct assabet_led *led = container_of(cdev,
 			struct assabet_led, cdev);

 	return (ASSABET_BCR & led->mask) ? LED_OFF : LED_FULL;
 }

 static int __init assabet_leds_init(void)
 {
 	int i;

 	if (!machine_is_assabet())
 		return -ENODEV;

 	for (i = 0; i < ARRAY_SIZE(assabet_leds); i++) {
 		struct assabet_led *led;

 		led = kzalloc(sizeof(*led), GFP_KERNEL);
 		if (!led)
 			break;

 		led->cdev.name = assabet_leds[i].name;
 		led->cdev.brightness_set = assabet_led_set;
 		led->cdev.brightness_get = assabet_led_get;
 		led->cdev.default_trigger = assabet_leds[i].trigger;

 		if (!i)
 			led->mask = ASSABET_BCR_LED_RED;
 		else
 			led->mask = ASSABET_BCR_LED_GREEN;

 		if (led_classdev_register(NULL, &led->cdev) < 0) {
 			kfree(led);
 			break;
 		}
 	}

 	return 0;
 }

 /*
  * Since we may have triggers on any subsystem, defer registration
  * until after subsystem_init.
  */
 fs_initcall(assabet_leds_init);
 #endif

 void __init assabet_init_irq(void)
 {
 	unsigned int assabet_gpio_base;
 	u32 def_val;

 	sa1100_init_irq();

 	if (machine_has_neponset())
 		def_val = ASSABET_BCR_DB1111;
 	else
 		def_val = ASSABET_BCR_DB1110;

 	/*
 	 * Angel sets this, but other bootloaders may not.
 	 *
 	 * This must precede any driver calls to BCR_set() or BCR_clear().
 	 */
 	assabet_gpio_base = assabet_init_gpio((void *)&ASSABET_BCR, def_val);

 	assabet_cf_vcc_pdata.gpio = assabet_gpio_base + 0;
 }

 MACHINE_START(ASSABET, "Intel-Assabet")
 	.atag_offset	= 0x100,
 	.fixup		= fixup_assabet,
 	.map_io		= assabet_map_io,
 	.nr_irqs	= SA1100_NR_IRQS,
 	.init_irq	= assabet_init_irq,
 	.init_time	= sa1100_timer_init,
 	.init_machine	= assabet_init,
 	.init_late	= sa11x0_init_late,
 #ifdef CONFIG_SA1111
 	.dma_zone_size	= SZ_1M,
 #endif
 	.restart	= sa11x0_restart,
 MACHINE_END
	/*
	* linux/arch/arm/mach-sa1100/assabet.c
	*
	* Author: Nicolas Pitre
	*
	* This file contains all Assabet-specific tweaks.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*/
	#include <linux/init.h>
	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/errno.h>
	#include <linux/gpio/gpio-reg.h>
	#include <linux/gpio/machine.h>
	#include <linux/ioport.h>
	#include <linux/platform_data/sa11x0-serial.h>
	#include <linux/regulator/fixed.h>
	#include <linux/regulator/machine.h>
	#include <linux/serial_core.h>
	#include <linux/platform_device.h>
	#include <linux/mfd/ucb1x00.h>
	#include <linux/mtd/mtd.h>
	#include <linux/mtd/partitions.h>
	#include <linux/delay.h>
	#include <linux/mm.h>
	#include <linux/leds.h>
	#include <linux/slab.h>

	#include <video/sa1100fb.h>

	#include <mach/hardware.h>
	#include <asm/mach-types.h>
	#include <asm/setup.h>
	#include <asm/page.h>
	#include <asm/pgtable-hwdef.h>
	#include <asm/pgtable.h>
	#include <asm/tlbflush.h>

	#include <asm/mach/arch.h>
	#include <asm/mach/flash.h>
	#include <linux/platform_data/irda-sa11x0.h>
	#include <asm/mach/map.h>
	#include <mach/assabet.h>
	#include <linux/platform_data/mfd-mcp-sa11x0.h>
	#include <mach/irqs.h>

	#include "generic.h"

	#define ASSABET_BCR_DB1110 \
	(ASSABET_BCR_SPK_OFF \| \
	ASSABET_BCR_LED_GREEN \| ASSABET_BCR_LED_RED \| \
	ASSABET_BCR_RS232EN \| ASSABET_BCR_LCD_12RGB \| \
	ASSABET_BCR_IRDA_MD0)

	#define ASSABET_BCR_DB1111 \
	(ASSABET_BCR_SPK_OFF \| \
	ASSABET_BCR_LED_GREEN \| ASSABET_BCR_LED_RED \| \
	ASSABET_BCR_RS232EN \| ASSABET_BCR_LCD_12RGB \| \
	ASSABET_BCR_CF_BUS_OFF \| ASSABET_BCR_STEREO_LB \| \
	ASSABET_BCR_IRDA_MD0 \| ASSABET_BCR_CF_RST)

	unsigned long SCR_value = ASSABET_SCR_INIT;
	EXPORT_SYMBOL(SCR_value);

	static struct gpio_chip *assabet_bcr_gc;

	static const char *assabet_names[] = {
	"cf_pwr", "cf_gfx_reset", "nsoft_reset", "irda_fsel",
	"irda_md0", "irda_md1", "stereo_loopback", "ncf_bus_on",
	"audio_pwr_on", "light_pwr_on", "lcd16data", "lcd_pwr_on",
	"rs232_on", "nred_led", "ngreen_led", "vib_on",
	"com_dtr", "com_rts", "radio_wake_mod", "i2c_enab",
	"tvir_enab", "qmute", "radio_pwr_on", "spkr_off",
	"rs232_valid", "com_dcd", "com_cts", "com_dsr",
	"radio_cts", "radio_dsr", "radio_dcd", "radio_ri",
	};

	/* The old deprecated interface */
	void ASSABET_BCR_frob(unsigned int mask, unsigned int val)
	{
	unsigned long m = mask, v = val;

	assabet_bcr_gc->set_multiple(assabet_bcr_gc, &m, &v);
	}
	EXPORT_SYMBOL(ASSABET_BCR_frob);

	static int __init assabet_init_gpio(void __iomem *reg, u32 def_val)
	{
	struct gpio_chip *gc;

	writel_relaxed(def_val, reg);

	gc = gpio_reg_init(NULL, reg, -1, 32, "assabet", 0xff000000, def_val,
	assabet_names, NULL, NULL);

	if (IS_ERR(gc))
	return PTR_ERR(gc);

	assabet_bcr_gc = gc;

	return gc->base;
	}

	/*
	* The codec reset goes to three devices, so we need to release
	* the rest when any one of these requests it. However, that
	* causes the ADV7171 to consume around 100mA - more than half
	* the LCD-blanked power.
	*
	* With the ADV7171, LCD and backlight enabled, we go over
	* budget on the MAX846 Li-Ion charger, and if no Li-Ion battery
	* is connected, the Assabet crashes.
	*/
	#define RST_UCB1X00 (1 << 0)
	#define RST_UDA1341 (1 << 1)
	#define RST_ADV7171 (1 << 2)

	#define SDA GPIO_GPIO(15)
	#define SCK GPIO_GPIO(18)
	#define MOD GPIO_GPIO(17)

	static void adv7171_start(void)
	{
	GPSR = SCK;
	udelay(1);
	GPSR = SDA;
	udelay(2);
	GPCR = SDA;
	}

	static void adv7171_stop(void)
	{
	GPSR = SCK;
	udelay(2);
	GPSR = SDA;
	udelay(1);
	}

	static void adv7171_send(unsigned byte)
	{
	unsigned i;

	for (i = 0; i < 8; i++, byte <<= 1) {
	GPCR = SCK;
	udelay(1);
	if (byte & 0x80)
	GPSR = SDA;
	else
	GPCR = SDA;
	udelay(1);
	GPSR = SCK;
	udelay(1);
	}
	GPCR = SCK;
	udelay(1);
	GPSR = SDA;
	udelay(1);
	GPDR &= ~SDA;
	GPSR = SCK;
	udelay(1);
	if (GPLR & SDA)
	printk(KERN_WARNING "No ACK from ADV7171\n");
	udelay(1);
	GPCR = SCK \| SDA;
	udelay(1);
	GPDR \|= SDA;
	udelay(1);
	}

	static void adv7171_write(unsigned reg, unsigned val)
	{
	unsigned gpdr = GPDR;
	unsigned gplr = GPLR;

	ASSABET_BCR_frob(ASSABET_BCR_AUDIO_ON, ASSABET_BCR_AUDIO_ON);
	udelay(100);

	GPCR = SDA \| SCK \| MOD; /* clear L3 mode to ensure UDA1341 doesn't respond */
	GPDR = (GPDR \| SCK \| MOD) & ~SDA;
	udelay(10);
	if (!(GPLR & SDA))
	printk(KERN_WARNING "Something dragging SDA down?\n");
	GPDR \|= SDA;

	adv7171_start();
	adv7171_send(0x54);
	adv7171_send(reg);
	adv7171_send(val);
	adv7171_stop();

	/* Restore GPIO state for L3 bus */
	GPSR = gplr & (SDA \| SCK \| MOD);
	GPCR = (~gplr) & (SDA \| SCK \| MOD);
	GPDR = gpdr;
	}

	static void adv7171_sleep(void)
	{
	/* Put the ADV7171 into sleep mode */
	adv7171_write(0x04, 0x40);
	}

	static unsigned codec_nreset;

	static void assabet_codec_reset(unsigned mask, int set)
	{
	unsigned long flags;
	bool old;

	local_irq_save(flags);
	old = !codec_nreset;
	if (set)
	codec_nreset &= ~mask;
	else
	codec_nreset \|= mask;

	if (old != !codec_nreset) {
	if (codec_nreset) {
	ASSABET_BCR_set(ASSABET_BCR_NCODEC_RST);
	adv7171_sleep();
	} else {
	ASSABET_BCR_clear(ASSABET_BCR_NCODEC_RST);
	}
	}
	local_irq_restore(flags);
	}

	static void assabet_ucb1x00_reset(enum ucb1x00_reset state)
	{
	int set = state == UCB_RST_REMOVE \|\| state == UCB_RST_SUSPEND \|\|
	state == UCB_RST_PROBE_FAIL;
	assabet_codec_reset(RST_UCB1X00, set);
	}

	void assabet_uda1341_reset(int set)
	{
	assabet_codec_reset(RST_UDA1341, set);
	}
	EXPORT_SYMBOL(assabet_uda1341_reset);


	/*
	* Assabet flash support code.
	*/

	#ifdef ASSABET_REV_4
	/*
	* Phase 4 Assabet has two 28F160B3 flash parts in bank 0:
	*/
	static struct mtd_partition assabet_partitions[] = {
	{
	.name = "bootloader",
	.size = 0x00020000,
	.offset = 0,
	.mask_flags = MTD_WRITEABLE,
	}, {
	.name = "bootloader params",
	.size = 0x00020000,
	.offset = MTDPART_OFS_APPEND,
	.mask_flags = MTD_WRITEABLE,
	}, {
	.name = "jffs",
	.size = MTDPART_SIZ_FULL,
	.offset = MTDPART_OFS_APPEND,
	}
	};
	#else
	/*
	* Phase 5 Assabet has two 28F128J3A flash parts in bank 0:
	*/
	static struct mtd_partition assabet_partitions[] = {
	{
	.name = "bootloader",
	.size = 0x00040000,
	.offset = 0,
	.mask_flags = MTD_WRITEABLE,
	}, {
	.name = "bootloader params",
	.size = 0x00040000,
	.offset = MTDPART_OFS_APPEND,
	.mask_flags = MTD_WRITEABLE,
	}, {
	.name = "jffs",
	.size = MTDPART_SIZ_FULL,
	.offset = MTDPART_OFS_APPEND,
	}
	};
	#endif

	static struct flash_platform_data assabet_flash_data = {
	.map_name = "cfi_probe",
	.parts = assabet_partitions,
	.nr_parts = ARRAY_SIZE(assabet_partitions),
	};

	static struct resource assabet_flash_resources[] = {
	DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M),
	DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_32M),
	};


	/*
	* Assabet IrDA support code.
	*/

	static int assabet_irda_set_power(struct device *dev, unsigned int state)
	{
	static unsigned int bcr_state[4] = {
	ASSABET_BCR_IRDA_MD0,
	ASSABET_BCR_IRDA_MD1\|ASSABET_BCR_IRDA_MD0,
	ASSABET_BCR_IRDA_MD1,
	0
	};

	if (state < 4)
	ASSABET_BCR_frob(ASSABET_BCR_IRDA_MD1 \| ASSABET_BCR_IRDA_MD0,
	bcr_state[state]);
	return 0;
	}

	static void assabet_irda_set_speed(struct device *dev, unsigned int speed)
	{
	if (speed < 4000000)
	ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL);
	else
	ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL);
	}

	static struct irda_platform_data assabet_irda_data = {
	.set_power = assabet_irda_set_power,
	.set_speed = assabet_irda_set_speed,
	};

	static struct ucb1x00_plat_data assabet_ucb1x00_data = {
	.reset = assabet_ucb1x00_reset,
	.gpio_base = -1,
	.can_wakeup = 1,
	};

	static struct mcp_plat_data assabet_mcp_data = {
	.mccr0 = MCCR0_ADM,
	.sclk_rate = 11981000,
	.codec_pdata = &assabet_ucb1x00_data,
	};

	static void assabet_lcd_set_visual(u32 visual)
	{
	u_int is_true_color = visual == FB_VISUAL_TRUECOLOR;

	if (machine_is_assabet()) {
	#if 1 // phase 4 or newer Assabet's
	if (is_true_color)
	ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
	else
	ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
	#else
	// older Assabet's
	if (is_true_color)
	ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
	else
	ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
	#endif
	}
	}

	#ifndef ASSABET_PAL_VIDEO
	static void assabet_lcd_backlight_power(int on)
	{
	if (on)
	ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON);
	else
	ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
	}

	/*
	* Turn on/off the backlight. When turning the backlight on, we wait
	* 500us after turning it on so we don't cause the supplies to droop
	* when we enable the LCD controller (and cause a hard reset.)
	*/
	static void assabet_lcd_power(int on)
	{
	if (on) {
	ASSABET_BCR_set(ASSABET_BCR_LCD_ON);
	udelay(500);
	} else
	ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
	}

	/*
	* The assabet uses a sharp LQ039Q2DS54 LCD module. It is actually
	* takes an RGB666 signal, but we provide it with an RGB565 signal
	* instead (def_rgb_16).
	*/
	static struct sa1100fb_mach_info lq039q2ds54_info = {
	.pixclock = 171521, .bpp = 16,
	.xres = 320, .yres = 240,

	.hsync_len = 5, .vsync_len = 1,
	.left_margin = 61, .upper_margin = 3,
	.right_margin = 9, .lower_margin = 0,

	.sync = FB_SYNC_HOR_HIGH_ACT \| FB_SYNC_VERT_HIGH_ACT,

	.lccr0 = LCCR0_Color \| LCCR0_Sngl \| LCCR0_Act,
	.lccr3 = LCCR3_OutEnH \| LCCR3_PixRsEdg \| LCCR3_ACBsDiv(2),

	.backlight_power = assabet_lcd_backlight_power,
	.lcd_power = assabet_lcd_power,
	.set_visual = assabet_lcd_set_visual,
	};
	#else
	static void assabet_pal_backlight_power(int on)
	{
	ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON);
	}

	static void assabet_pal_power(int on)
	{
	ASSABET_BCR_clear(ASSABET_BCR_LCD_ON);
	}

	static struct sa1100fb_mach_info pal_info = {
	.pixclock = 67797, .bpp = 16,
	.xres = 640, .yres = 512,

	.hsync_len = 64, .vsync_len = 6,
	.left_margin = 125, .upper_margin = 70,
	.right_margin = 115, .lower_margin = 36,

	.lccr0 = LCCR0_Color \| LCCR0_Sngl \| LCCR0_Act,
	.lccr3 = LCCR3_OutEnH \| LCCR3_PixRsEdg \| LCCR3_ACBsDiv(512),

	.backlight_power = assabet_pal_backlight_power,
	.lcd_power = assabet_pal_power,
	.set_visual = assabet_lcd_set_visual,
	};
	#endif

	#ifdef CONFIG_ASSABET_NEPONSET
	static struct resource neponset_resources[] = {
	DEFINE_RES_MEM(0x10000000, 0x08000000),
	DEFINE_RES_MEM(0x18000000, 0x04000000),
	DEFINE_RES_MEM(0x40000000, SZ_8K),
	DEFINE_RES_IRQ(IRQ_GPIO25),
	};
	#endif

	static struct gpiod_lookup_table assabet_cf_gpio_table = {
	.dev_id = "sa11x0-pcmcia.1",
	.table = {
	GPIO_LOOKUP("gpio", 21, "ready", GPIO_ACTIVE_HIGH),
	GPIO_LOOKUP("gpio", 22, "detect", GPIO_ACTIVE_LOW),
	GPIO_LOOKUP("gpio", 24, "bvd2", GPIO_ACTIVE_HIGH),
	GPIO_LOOKUP("gpio", 25, "bvd1", GPIO_ACTIVE_HIGH),
	GPIO_LOOKUP("assabet", 1, "reset", GPIO_ACTIVE_HIGH),
	GPIO_LOOKUP("assabet", 7, "bus-enable", GPIO_ACTIVE_LOW),
	{ },
	},
	};

	static struct regulator_consumer_supply assabet_cf_vcc_consumers[] = {
	REGULATOR_SUPPLY("vcc", "sa11x0-pcmcia.1"),
	};

	static struct fixed_voltage_config assabet_cf_vcc_pdata __initdata = {
	.supply_name = "cf-power",
	.microvolts = 3300000,
	.enable_high = 1,
	};

	static void __init assabet_init(void)
	{
	/*
	* Ensure that the power supply is in "high power" mode.
	*/
	GPSR = GPIO_GPIO16;
	GPDR \|= GPIO_GPIO16;

	/*
	* Ensure that these pins are set as outputs and are driving
	* logic 0. This ensures that we won't inadvertently toggle
	* the WS latch in the CPLD, and we don't float causing
	* excessive power drain. --rmk
	*/
	GPCR = GPIO_SSP_TXD \| GPIO_SSP_SCLK \| GPIO_SSP_SFRM;
	GPDR \|= GPIO_SSP_TXD \| GPIO_SSP_SCLK \| GPIO_SSP_SFRM;

	/*
	* Also set GPIO27 as an output; this is used to clock UART3
	* via the FPGA and as otherwise has no pullups or pulldowns,
	* so stop it floating.
	*/
	GPCR = GPIO_GPIO27;
	GPDR \|= GPIO_GPIO27;

	/*
	* Set up registers for sleep mode.
	*/
	PWER = PWER_GPIO0;
	PGSR = 0;
	PCFR = 0;
	PSDR = 0;
	PPDR \|= PPC_TXD3 \| PPC_TXD1;
	PPSR \|= PPC_TXD3 \| PPC_TXD1;

	sa11x0_ppc_configure_mcp();

	if (machine_has_neponset()) {
	#ifndef CONFIG_ASSABET_NEPONSET
	printk( "Warning: Neponset detected but full support "
	"hasn't been configured in the kernel\n" );
	#else
	platform_device_register_simple("neponset", 0,
	neponset_resources, ARRAY_SIZE(neponset_resources));
	#endif
	} else {
	sa11x0_register_fixed_regulator(0, &assabet_cf_vcc_pdata,
	assabet_cf_vcc_consumers,
	ARRAY_SIZE(assabet_cf_vcc_consumers));

	}

	#ifndef ASSABET_PAL_VIDEO
	sa11x0_register_lcd(&lq039q2ds54_info);
	#else
	sa11x0_register_lcd(&pal_video);
	#endif
	sa11x0_register_mtd(&assabet_flash_data, assabet_flash_resources,
	ARRAY_SIZE(assabet_flash_resources));
	sa11x0_register_irda(&assabet_irda_data);
	sa11x0_register_mcp(&assabet_mcp_data);

	if (!machine_has_neponset())
	sa11x0_register_pcmcia(1, &assabet_cf_gpio_table);
	}

	/*
	* On Assabet, we must probe for the Neponset board _before_
	* paging_init() has occurred to actually determine the amount
	* of RAM available. To do so, we map the appropriate IO section
	* in the page table here in order to access GPIO registers.
	*/
	static void __init map_sa1100_gpio_regs( void )
	{
	unsigned long phys = __PREG(GPLR) & PMD_MASK;
	unsigned long virt = (unsigned long)io_p2v(phys);
	int prot = PMD_TYPE_SECT \| PMD_SECT_AP_WRITE \| PMD_DOMAIN(DOMAIN_IO);
	pmd_t *pmd;

	pmd = pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt);
	*pmd = __pmd(phys \| prot);
	flush_pmd_entry(pmd);
	}

	/*
	* Read System Configuration "Register"
	* (taken from "Intel StrongARM SA-1110 Microprocessor Development Board
	* User's Guide", section 4.4.1)
	*
	* This same scan is performed in arch/arm/boot/compressed/head-sa1100.S
	* to set up the serial port for decompression status messages. We
	* repeat it here because the kernel may not be loaded as a zImage, and
	* also because it's a hassle to communicate the SCR value to the kernel
	* from the decompressor.
	*
	* Note that IRQs are guaranteed to be disabled.
	*/
	static void __init get_assabet_scr(void)
	{
	unsigned long uninitialized_var(scr), i;

	GPDR \|= 0x3fc; /* Configure GPIO 9:2 as outputs */
	GPSR = 0x3fc; /* Write 0xFF to GPIO 9:2 */
	GPDR &= ~(0x3fc); /* Configure GPIO 9:2 as inputs */
	for(i = 100; i--; ) /* Read GPIO 9:2 */
	scr = GPLR;
	GPDR \|= 0x3fc; /* restore correct pin direction */
	scr &= 0x3fc; /* save as system configuration byte. */
	SCR_value = scr;
	}

	static void __init
	fixup_assabet(struct tag tags, char *cmdline)
	{
	/* This must be done before any call to machine_has_neponset() */
	map_sa1100_gpio_regs();
	get_assabet_scr();

	if (machine_has_neponset())
	printk("Neponset expansion board detected\n");
	}


	static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
	{
	if (port->mapbase == _Ser1UTCR0) {
	if (state)
	ASSABET_BCR_clear(ASSABET_BCR_RS232EN \|
	ASSABET_BCR_COM_RTS \|
	ASSABET_BCR_COM_DTR);
	else
	ASSABET_BCR_set(ASSABET_BCR_RS232EN \|
	ASSABET_BCR_COM_RTS \|
	ASSABET_BCR_COM_DTR);
	}
	}

	/*
	* Assabet uses COM_RTS and COM_DTR for both UART1 (com port)
	* and UART3 (radio module). We only handle them for UART1 here.
	*/
	static void assabet_set_mctrl(struct uart_port *port, u_int mctrl)
	{
	if (port->mapbase == _Ser1UTCR0) {
	u_int set = 0, clear = 0;

	if (mctrl & TIOCM_RTS)
	clear \|= ASSABET_BCR_COM_RTS;
	else
	set \|= ASSABET_BCR_COM_RTS;

	if (mctrl & TIOCM_DTR)
	clear \|= ASSABET_BCR_COM_DTR;
	else
	set \|= ASSABET_BCR_COM_DTR;

	ASSABET_BCR_clear(clear);
	ASSABET_BCR_set(set);
	}
	}

	static u_int assabet_get_mctrl(struct uart_port *port)
	{
	u_int ret = 0;
	u_int bsr = ASSABET_BSR;

	/* need 2 reads to read current value */
	bsr = ASSABET_BSR;

	if (port->mapbase == _Ser1UTCR0) {
	if (bsr & ASSABET_BSR_COM_DCD)
	ret \|= TIOCM_CD;
	if (bsr & ASSABET_BSR_COM_CTS)
	ret \|= TIOCM_CTS;
	if (bsr & ASSABET_BSR_COM_DSR)
	ret \|= TIOCM_DSR;
	} else if (port->mapbase == _Ser3UTCR0) {
	if (bsr & ASSABET_BSR_RAD_DCD)
	ret \|= TIOCM_CD;
	if (bsr & ASSABET_BSR_RAD_CTS)
	ret \|= TIOCM_CTS;
	if (bsr & ASSABET_BSR_RAD_DSR)
	ret \|= TIOCM_DSR;
	if (bsr & ASSABET_BSR_RAD_RI)
	ret \|= TIOCM_RI;
	} else {
	ret = TIOCM_CD \| TIOCM_CTS \| TIOCM_DSR;
	}

	return ret;
	}

	static struct sa1100_port_fns assabet_port_fns __initdata = {
	.set_mctrl = assabet_set_mctrl,
	.get_mctrl = assabet_get_mctrl,
	.pm = assabet_uart_pm,
	};

	static struct map_desc assabet_io_desc[] __initdata = {
	{ /* Board Control Register */
	.virtual = 0xf1000000,
	.pfn = __phys_to_pfn(0x12000000),
	.length = 0x00100000,
	.type = MT_DEVICE
	}, { /* MQ200 */
	.virtual = 0xf2800000,
	.pfn = __phys_to_pfn(0x4b800000),
	.length = 0x00800000,
	.type = MT_DEVICE
	}
	};

	static void __init assabet_map_io(void)
	{
	sa1100_map_io();
	iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc));

	/*
	* Set SUS bit in SDCR0 so serial port 1 functions.
	* Its called GPCLKR0 in my SA1110 manual.
	*/
	Ser1SDCR0 \|= SDCR0_SUS;
	MSC1 = (MSC1 & ~0xffff) \|
	MSC_NonBrst \| MSC_32BitStMem \|
	MSC_RdAcc(2) \| MSC_WrAcc(2) \| MSC_Rec(0);

	if (!machine_has_neponset())
	sa1100_register_uart_fns(&assabet_port_fns);

	/*
	* When Neponset is attached, the first UART should be
	* UART3. That's what Angel is doing and many documents
	* are stating this.
	*
	* We do the Neponset mapping even if Neponset support
	* isn't compiled in so the user will still get something on
	* the expected physical serial port.
	*
	* We no longer do this; not all boot loaders support it,
	* and UART3 appears to be somewhat unreliable with blob.
	*/
	sa1100_register_uart(0, 1);
	sa1100_register_uart(2, 3);
	}

	/* LEDs */
	#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
	struct assabet_led {
	struct led_classdev cdev;
	u32 mask;
	};

	/*
	* The triggers lines up below will only be used if the
	* LED triggers are compiled in.
	*/
	static const struct {
	const char *name;
	const char *trigger;
	} assabet_leds[] = {
	{ "assabet:red", "cpu0",},
	{ "assabet:green", "heartbeat", },
	};

	/*
	* The LED control in Assabet is reversed:
	* - setting bit means turn off LED
	* - clearing bit means turn on LED
	*/
	static void assabet_led_set(struct led_classdev *cdev,
	enum led_brightness b)
	{
	struct assabet_led *led = container_of(cdev,
	struct assabet_led, cdev);

	if (b != LED_OFF)
	ASSABET_BCR_clear(led->mask);
	else
	ASSABET_BCR_set(led->mask);
	}

	static enum led_brightness assabet_led_get(struct led_classdev *cdev)
	{
	struct assabet_led *led = container_of(cdev,
	struct assabet_led, cdev);

	return (ASSABET_BCR & led->mask) ? LED_OFF : LED_FULL;
	}

	static int __init assabet_leds_init(void)
	{
	int i;

	if (!machine_is_assabet())
	return -ENODEV;

	for (i = 0; i < ARRAY_SIZE(assabet_leds); i++) {
	struct assabet_led *led;

	led = kzalloc(sizeof(*led), GFP_KERNEL);
	if (!led)
	break;

	led->cdev.name = assabet_leds[i].name;
	led->cdev.brightness_set = assabet_led_set;
	led->cdev.brightness_get = assabet_led_get;
	led->cdev.default_trigger = assabet_leds[i].trigger;

	if (!i)
	led->mask = ASSABET_BCR_LED_RED;
	else
	led->mask = ASSABET_BCR_LED_GREEN;

	if (led_classdev_register(NULL, &led->cdev) < 0) {
	kfree(led);
	break;
	}
	}

	return 0;
	}

	/*
	* Since we may have triggers on any subsystem, defer registration
	* until after subsystem_init.
	*/
	fs_initcall(assabet_leds_init);
	#endif

	void __init assabet_init_irq(void)
	{
	unsigned int assabet_gpio_base;
	u32 def_val;

	sa1100_init_irq();

	if (machine_has_neponset())
	def_val = ASSABET_BCR_DB1111;
	else
	def_val = ASSABET_BCR_DB1110;

	/*
	* Angel sets this, but other bootloaders may not.
	*
	* This must precede any driver calls to BCR_set() or BCR_clear().
	*/
	assabet_gpio_base = assabet_init_gpio((void *)&ASSABET_BCR, def_val);

	assabet_cf_vcc_pdata.gpio = assabet_gpio_base + 0;
	}

	MACHINE_START(ASSABET, "Intel-Assabet")
	.atag_offset = 0x100,
	.fixup = fixup_assabet,
	.map_io = assabet_map_io,
	.nr_irqs = SA1100_NR_IRQS,
	.init_irq = assabet_init_irq,
	.init_time = sa1100_timer_init,
	.init_machine = assabet_init,
	.init_late = sa11x0_init_late,
	#ifdef CONFIG_SA1111
	.dma_zone_size = SZ_1M,
	#endif
	.restart = sa11x0_restart,
	MACHINE_END