arch/arm/mach-ixp4xx/goramo_mlr.c - kernel/windcharger - Git at Google

 /*
  * Goramo MultiLink router platform code
  * Copyright (C) 2006-2009 Krzysztof Halasa <khc@pm.waw.pl>
  */

 #include <linux/delay.h>
 #include <linux/hdlc.h>
 #include <linux/i2c-gpio.h>
 #include <linux/io.h>
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/serial_8250.h>
 #include <asm/mach-types.h>
 #include <asm/system.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/flash.h>
 #include <asm/mach/pci.h>

 #define SLOT_ETHA		0x0B	/* IDSEL = AD21 */
 #define SLOT_ETHB		0x0C	/* IDSEL = AD20 */
 #define SLOT_MPCI		0x0D	/* IDSEL = AD19 */
 #define SLOT_NEC		0x0E	/* IDSEL = AD18 */

 /* GPIO lines */
 #define GPIO_SCL		0
 #define GPIO_SDA		1
 #define GPIO_STR		2
 #define GPIO_IRQ_NEC		3
 #define GPIO_IRQ_ETHA		4
 #define GPIO_IRQ_ETHB		5
 #define GPIO_HSS0_DCD_N		6
 #define GPIO_HSS1_DCD_N		7
 #define GPIO_UART0_DCD		8
 #define GPIO_UART1_DCD		9
 #define GPIO_HSS0_CTS_N		10
 #define GPIO_HSS1_CTS_N		11
 #define GPIO_IRQ_MPCI		12
 #define GPIO_HSS1_RTS_N		13
 #define GPIO_HSS0_RTS_N		14
 /* GPIO15 is not connected */

 /* Control outputs from 74HC4094 */
 #define CONTROL_HSS0_CLK_INT	0
 #define CONTROL_HSS1_CLK_INT	1
 #define CONTROL_HSS0_DTR_N	2
 #define CONTROL_HSS1_DTR_N	3
 #define CONTROL_EXT		4
 #define CONTROL_AUTO_RESET	5
 #define CONTROL_PCI_RESET_N	6
 #define CONTROL_EEPROM_WC_N	7

 /* offsets from start of flash ROM = 0x50000000 */
 #define CFG_ETH0_ADDRESS	0x40 /* 6 bytes */
 #define CFG_ETH1_ADDRESS	0x46 /* 6 bytes */
 #define CFG_REV			0x4C /* u32 */
 #define CFG_SDRAM_SIZE		0x50 /* u32 */
 #define CFG_SDRAM_CONF		0x54 /* u32 */
 #define CFG_SDRAM_MODE		0x58 /* u32 */
 #define CFG_SDRAM_REFRESH	0x5C /* u32 */

 #define CFG_HW_BITS		0x60 /* u32 */
 #define  CFG_HW_USB_PORTS	0x00000007 /* 0 = no NEC chip, 1-5 = ports # */
 #define  CFG_HW_HAS_PCI_SLOT	0x00000008
 #define  CFG_HW_HAS_ETH0	0x00000010
 #define  CFG_HW_HAS_ETH1	0x00000020
 #define  CFG_HW_HAS_HSS0	0x00000040
 #define  CFG_HW_HAS_HSS1	0x00000080
 #define  CFG_HW_HAS_UART0	0x00000100
 #define  CFG_HW_HAS_UART1	0x00000200
 #define  CFG_HW_HAS_EEPROM	0x00000400

 #define FLASH_CMD_READ_ARRAY	0xFF
 #define FLASH_CMD_READ_ID	0x90
 #define FLASH_SER_OFF		0x102 /* 0x81 in 16-bit mode */

 static u32 hw_bits = 0xFFFFFFFD;    /* assume all hardware present */;
 static u8 control_value;

 static void set_scl(u8 value)
 {
 	gpio_line_set(GPIO_SCL, !!value);
 	udelay(3);
 }

 static void set_sda(u8 value)
 {
 	gpio_line_set(GPIO_SDA, !!value);
 	udelay(3);
 }

 static void set_str(u8 value)
 {
 	gpio_line_set(GPIO_STR, !!value);
 	udelay(3);
 }

 static inline void set_control(int line, int value)
 {
 	if (value)
 		control_value |=  (1 << line);
 	else
 		control_value &= ~(1 << line);
 }


 static void output_control(void)
 {
 	int i;

 	gpio_line_config(GPIO_SCL, IXP4XX_GPIO_OUT);
 	gpio_line_config(GPIO_SDA, IXP4XX_GPIO_OUT);

 	for (i = 0; i < 8; i++) {
 		set_scl(0);
 		set_sda(control_value & (0x80 >> i)); /* MSB first */
 		set_scl(1);	/* active edge */
 	}

 	set_str(1);
 	set_str(0);

 	set_scl(0);
 	set_sda(1);		/* Be ready for START */
 	set_scl(1);
 }


 static void (*set_carrier_cb_tab[2])(void *pdev, int carrier);

 static int hss_set_clock(int port, unsigned int clock_type)
 {
 	int ctrl_int = port ? CONTROL_HSS1_CLK_INT : CONTROL_HSS0_CLK_INT;

 	switch (clock_type) {
 	case CLOCK_DEFAULT:
 	case CLOCK_EXT:
 		set_control(ctrl_int, 0);
 		output_control();
 		return CLOCK_EXT;

 	case CLOCK_INT:
 		set_control(ctrl_int, 1);
 		output_control();
 		return CLOCK_INT;

 	default:
 		return -EINVAL;
 	}
 }

 static irqreturn_t hss_dcd_irq(int irq, void *pdev)
 {
 	int i, port = (irq == IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N));
 	gpio_line_get(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N, &i);
 	set_carrier_cb_tab[port](pdev, !i);
 	return IRQ_HANDLED;
 }


 static int hss_open(int port, void *pdev,
 		    void (*set_carrier_cb)(void *pdev, int carrier))
 {
 	int i, irq;

 	if (!port)
 		irq = IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N);
 	else
 		irq = IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N);

 	gpio_line_get(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N, &i);
 	set_carrier_cb(pdev, !i);

 	set_carrier_cb_tab[!!port] = set_carrier_cb;

 	if ((i = request_irq(irq, hss_dcd_irq, 0, "IXP4xx HSS", pdev)) != 0) {
 		printk(KERN_ERR "ixp4xx_hss: failed to request IRQ%i (%i)\n",
 		       irq, i);
 		return i;
 	}

 	set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 0);
 	output_control();
 	gpio_line_set(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 0);
 	return 0;
 }

 static void hss_close(int port, void *pdev)
 {
 	free_irq(port ? IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N) :
 		 IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N), pdev);
 	set_carrier_cb_tab[!!port] = NULL; /* catch bugs */

 	set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 1);
 	output_control();
 	gpio_line_set(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 1);
 }


 /* Flash memory */
 static struct flash_platform_data flash_data = {
 	.map_name	= "cfi_probe",
 	.width		= 2,
 };

 static struct resource flash_resource = {
 	.flags		= IORESOURCE_MEM,
 };

 static struct platform_device device_flash = {
 	.name		= "IXP4XX-Flash",
 	.id		= 0,
 	.dev		= { .platform_data = &flash_data },
 	.num_resources	= 1,
 	.resource	= &flash_resource,
 };


 /* I^2C interface */
 static struct i2c_gpio_platform_data i2c_data = {
 	.sda_pin	= GPIO_SDA,
 	.scl_pin	= GPIO_SCL,
 };

 static struct platform_device device_i2c = {
 	.name		= "i2c-gpio",
 	.id		= 0,
 	.dev		= { .platform_data = &i2c_data },
 };


 /* IXP425 2 UART ports */
 static struct resource uart_resources[] = {
 	{
 		.start		= IXP4XX_UART1_BASE_PHYS,
 		.end		= IXP4XX_UART1_BASE_PHYS + 0x0fff,
 		.flags		= IORESOURCE_MEM,
 	},
 	{
 		.start		= IXP4XX_UART2_BASE_PHYS,
 		.end		= IXP4XX_UART2_BASE_PHYS + 0x0fff,
 		.flags		= IORESOURCE_MEM,
 	}
 };

 static struct plat_serial8250_port uart_data[] = {
 	{
 		.mapbase	= IXP4XX_UART1_BASE_PHYS,
 		.membase	= (char __iomem *)IXP4XX_UART1_BASE_VIRT +
 			REG_OFFSET,
 		.irq		= IRQ_IXP4XX_UART1,
 		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 		.iotype		= UPIO_MEM,
 		.regshift	= 2,
 		.uartclk	= IXP4XX_UART_XTAL,
 	},
 	{
 		.mapbase	= IXP4XX_UART2_BASE_PHYS,
 		.membase	= (char __iomem *)IXP4XX_UART2_BASE_VIRT +
 			REG_OFFSET,
 		.irq		= IRQ_IXP4XX_UART2,
 		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
 		.iotype		= UPIO_MEM,
 		.regshift	= 2,
 		.uartclk	= IXP4XX_UART_XTAL,
 	},
 	{ },
 };

 static struct platform_device device_uarts = {
 	.name			= "serial8250",
 	.id			= PLAT8250_DEV_PLATFORM,
 	.dev.platform_data	= uart_data,
 	.num_resources		= 2,
 	.resource		= uart_resources,
 };


 /* Built-in 10/100 Ethernet MAC interfaces */
 static struct eth_plat_info eth_plat[] = {
 	{
 		.phy		= 0,
 		.rxq		= 3,
 		.txreadyq	= 32,
 	}, {
 		.phy		= 1,
 		.rxq		= 4,
 		.txreadyq	= 33,
 	}
 };

 static struct platform_device device_eth_tab[] = {
 	{
 		.name			= "ixp4xx_eth",
 		.id			= IXP4XX_ETH_NPEB,
 		.dev.platform_data	= eth_plat,
 	}, {
 		.name			= "ixp4xx_eth",
 		.id			= IXP4XX_ETH_NPEC,
 		.dev.platform_data	= eth_plat + 1,
 	}
 };


 /* IXP425 2 synchronous serial ports */
 static struct hss_plat_info hss_plat[] = {
 	{
 		.set_clock	= hss_set_clock,
 		.open		= hss_open,
 		.close		= hss_close,
 		.txreadyq	= 34,
 	}, {
 		.set_clock	= hss_set_clock,
 		.open		= hss_open,
 		.close		= hss_close,
 		.txreadyq	= 35,
 	}
 };

 static struct platform_device device_hss_tab[] = {
 	{
 		.name			= "ixp4xx_hss",
 		.id			= 0,
 		.dev.platform_data	= hss_plat,
 	}, {
 		.name			= "ixp4xx_hss",
 		.id			= 1,
 		.dev.platform_data	= hss_plat + 1,
 	}
 };


 static struct platform_device *device_tab[6] __initdata = {
 	&device_flash,		/* index 0 */
 };

 static inline u8 __init flash_readb(u8 __iomem *flash, u32 addr)
 {
 #ifdef __ARMEB__
 	return __raw_readb(flash + addr);
 #else
 	return __raw_readb(flash + (addr ^ 3));
 #endif
 }

 static inline u16 __init flash_readw(u8 __iomem *flash, u32 addr)
 {
 #ifdef __ARMEB__
 	return __raw_readw(flash + addr);
 #else
 	return __raw_readw(flash + (addr ^ 2));
 #endif
 }

 static void __init gmlr_init(void)
 {
 	u8 __iomem *flash;
 	int i, devices = 1; /* flash */

 	ixp4xx_sys_init();

 	if ((flash = ioremap(IXP4XX_EXP_BUS_BASE_PHYS, 0x80)) == NULL)
 		printk(KERN_ERR "goramo-mlr: unable to access system"
 		       " configuration data\n");
 	else {
 		system_rev = __raw_readl(flash + CFG_REV);
 		hw_bits = __raw_readl(flash + CFG_HW_BITS);

 		for (i = 0; i < ETH_ALEN; i++) {
 			eth_plat[0].hwaddr[i] =
 				flash_readb(flash, CFG_ETH0_ADDRESS + i);
 			eth_plat[1].hwaddr[i] =
 				flash_readb(flash, CFG_ETH1_ADDRESS + i);
 		}

 		__raw_writew(FLASH_CMD_READ_ID, flash);
 		system_serial_high = flash_readw(flash, FLASH_SER_OFF);
 		system_serial_high <<= 16;
 		system_serial_high |= flash_readw(flash, FLASH_SER_OFF + 2);
 		system_serial_low = flash_readw(flash, FLASH_SER_OFF + 4);
 		system_serial_low <<= 16;
 		system_serial_low |= flash_readw(flash, FLASH_SER_OFF + 6);
 		__raw_writew(FLASH_CMD_READ_ARRAY, flash);

 		iounmap(flash);
 	}

 	switch (hw_bits & (CFG_HW_HAS_UART0 | CFG_HW_HAS_UART1)) {
 	case CFG_HW_HAS_UART0:
 		memset(&uart_data[1], 0, sizeof(uart_data[1]));
 		device_uarts.num_resources = 1;
 		break;

 	case CFG_HW_HAS_UART1:
 		device_uarts.dev.platform_data = &uart_data[1];
 		device_uarts.resource = &uart_resources[1];
 		device_uarts.num_resources = 1;
 		break;
 	}
 	if (hw_bits & (CFG_HW_HAS_UART0 | CFG_HW_HAS_UART1))
 		device_tab[devices++] = &device_uarts; /* max index 1 */

 	if (hw_bits & CFG_HW_HAS_ETH0)
 		device_tab[devices++] = &device_eth_tab[0]; /* max index 2 */
 	if (hw_bits & CFG_HW_HAS_ETH1)
 		device_tab[devices++] = &device_eth_tab[1]; /* max index 3 */

 	if (hw_bits & CFG_HW_HAS_HSS0)
 		device_tab[devices++] = &device_hss_tab[0]; /* max index 4 */
 	if (hw_bits & CFG_HW_HAS_HSS1)
 		device_tab[devices++] = &device_hss_tab[1]; /* max index 5 */

 	if (hw_bits & CFG_HW_HAS_EEPROM)
 		device_tab[devices++] = &device_i2c; /* max index 6 */

 	gpio_line_config(GPIO_SCL, IXP4XX_GPIO_OUT);
 	gpio_line_config(GPIO_SDA, IXP4XX_GPIO_OUT);
 	gpio_line_config(GPIO_STR, IXP4XX_GPIO_OUT);
 	gpio_line_config(GPIO_HSS0_RTS_N, IXP4XX_GPIO_OUT);
 	gpio_line_config(GPIO_HSS1_RTS_N, IXP4XX_GPIO_OUT);
 	gpio_line_config(GPIO_HSS0_DCD_N, IXP4XX_GPIO_IN);
 	gpio_line_config(GPIO_HSS1_DCD_N, IXP4XX_GPIO_IN);
 	irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N), IRQ_TYPE_EDGE_BOTH);
 	irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N), IRQ_TYPE_EDGE_BOTH);

 	set_control(CONTROL_HSS0_DTR_N, 1);
 	set_control(CONTROL_HSS1_DTR_N, 1);
 	set_control(CONTROL_EEPROM_WC_N, 1);
 	set_control(CONTROL_PCI_RESET_N, 1);
 	output_control();

 	msleep(1);	      /* Wait for PCI devices to initialize */

 	flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 	flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;

 	platform_add_devices(device_tab, devices);
 }


 #ifdef CONFIG_PCI
 static void __init gmlr_pci_preinit(void)
 {
 	irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHA), IRQ_TYPE_LEVEL_LOW);
 	irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHB), IRQ_TYPE_LEVEL_LOW);
 	irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_NEC), IRQ_TYPE_LEVEL_LOW);
 	irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_MPCI), IRQ_TYPE_LEVEL_LOW);
 	ixp4xx_pci_preinit();
 }

 static void __init gmlr_pci_postinit(void)
 {
 	if ((hw_bits & CFG_HW_USB_PORTS) >= 2 &&
 	    (hw_bits & CFG_HW_USB_PORTS) < 5) {
 		/* need to adjust number of USB ports on NEC chip */
 		u32 value, addr = BIT(32 - SLOT_NEC) | 0xE0;
 		if (!ixp4xx_pci_read(addr, NP_CMD_CONFIGREAD, &value)) {
 			value &= ~7;
 			value |= (hw_bits & CFG_HW_USB_PORTS);
 			ixp4xx_pci_write(addr, NP_CMD_CONFIGWRITE, value);
 		}
 	}
 }

 static int __init gmlr_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 {
 	switch(slot) {
 	case SLOT_ETHA:	return IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHA);
 	case SLOT_ETHB:	return IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHB);
 	case SLOT_NEC:	return IXP4XX_GPIO_IRQ(GPIO_IRQ_NEC);
 	default:	return IXP4XX_GPIO_IRQ(GPIO_IRQ_MPCI);
 	}
 }

 static struct hw_pci gmlr_hw_pci __initdata = {
 	.nr_controllers = 1,
 	.preinit	= gmlr_pci_preinit,
 	.postinit	= gmlr_pci_postinit,
 	.swizzle	= pci_std_swizzle,
 	.setup		= ixp4xx_setup,
 	.scan		= ixp4xx_scan_bus,
 	.map_irq	= gmlr_map_irq,
 };

 static int __init gmlr_pci_init(void)
 {
 	if (machine_is_goramo_mlr() &&
 	    (hw_bits & (CFG_HW_USB_PORTS | CFG_HW_HAS_PCI_SLOT)))
 		pci_common_init(&gmlr_hw_pci);
 	return 0;
 }

 subsys_initcall(gmlr_pci_init);
 #endif /* CONFIG_PCI */


 MACHINE_START(GORAMO_MLR, "MultiLink")
 	/* Maintainer: Krzysztof Halasa */
 	.map_io		= ixp4xx_map_io,
 	.init_irq	= ixp4xx_init_irq,
 	.timer		= &ixp4xx_timer,
 	.atag_offset	= 0x100,
 	.init_machine	= gmlr_init,
 #if defined(CONFIG_PCI)
 	.dma_zone_size	= SZ_64M,
 #endif
 	.restart	= ixp4xx_restart,
 MACHINE_END
	/*
	* Goramo MultiLink router platform code
	* Copyright (C) 2006-2009 Krzysztof Halasa <khc@pm.waw.pl>
	*/

	#include <linux/delay.h>
	#include <linux/hdlc.h>
	#include <linux/i2c-gpio.h>
	#include <linux/io.h>
	#include <linux/irq.h>
	#include <linux/kernel.h>
	#include <linux/pci.h>
	#include <linux/serial_8250.h>
	#include <asm/mach-types.h>
	#include <asm/system.h>
	#include <asm/mach/arch.h>
	#include <asm/mach/flash.h>
	#include <asm/mach/pci.h>

	#define SLOT_ETHA 0x0B /* IDSEL = AD21 */
	#define SLOT_ETHB 0x0C /* IDSEL = AD20 */
	#define SLOT_MPCI 0x0D /* IDSEL = AD19 */
	#define SLOT_NEC 0x0E /* IDSEL = AD18 */

	/* GPIO lines */
	#define GPIO_SCL 0
	#define GPIO_SDA 1
	#define GPIO_STR 2
	#define GPIO_IRQ_NEC 3
	#define GPIO_IRQ_ETHA 4
	#define GPIO_IRQ_ETHB 5
	#define GPIO_HSS0_DCD_N 6
	#define GPIO_HSS1_DCD_N 7
	#define GPIO_UART0_DCD 8
	#define GPIO_UART1_DCD 9
	#define GPIO_HSS0_CTS_N 10
	#define GPIO_HSS1_CTS_N 11
	#define GPIO_IRQ_MPCI 12
	#define GPIO_HSS1_RTS_N 13
	#define GPIO_HSS0_RTS_N 14
	/* GPIO15 is not connected */

	/* Control outputs from 74HC4094 */
	#define CONTROL_HSS0_CLK_INT 0
	#define CONTROL_HSS1_CLK_INT 1
	#define CONTROL_HSS0_DTR_N 2
	#define CONTROL_HSS1_DTR_N 3
	#define CONTROL_EXT 4
	#define CONTROL_AUTO_RESET 5
	#define CONTROL_PCI_RESET_N 6
	#define CONTROL_EEPROM_WC_N 7

	/* offsets from start of flash ROM = 0x50000000 */
	#define CFG_ETH0_ADDRESS 0x40 /* 6 bytes */
	#define CFG_ETH1_ADDRESS 0x46 /* 6 bytes */
	#define CFG_REV 0x4C /* u32 */
	#define CFG_SDRAM_SIZE 0x50 /* u32 */
	#define CFG_SDRAM_CONF 0x54 /* u32 */
	#define CFG_SDRAM_MODE 0x58 /* u32 */
	#define CFG_SDRAM_REFRESH 0x5C /* u32 */

	#define CFG_HW_BITS 0x60 /* u32 */
	#define CFG_HW_USB_PORTS 0x00000007 /* 0 = no NEC chip, 1-5 = ports # */
	#define CFG_HW_HAS_PCI_SLOT 0x00000008
	#define CFG_HW_HAS_ETH0 0x00000010
	#define CFG_HW_HAS_ETH1 0x00000020
	#define CFG_HW_HAS_HSS0 0x00000040
	#define CFG_HW_HAS_HSS1 0x00000080
	#define CFG_HW_HAS_UART0 0x00000100
	#define CFG_HW_HAS_UART1 0x00000200
	#define CFG_HW_HAS_EEPROM 0x00000400

	#define FLASH_CMD_READ_ARRAY 0xFF
	#define FLASH_CMD_READ_ID 0x90
	#define FLASH_SER_OFF 0x102 /* 0x81 in 16-bit mode */

	static u32 hw_bits = 0xFFFFFFFD; /* assume all hardware present */;
	static u8 control_value;

	static void set_scl(u8 value)
	{
	gpio_line_set(GPIO_SCL, !!value);
	udelay(3);
	}

	static void set_sda(u8 value)
	{
	gpio_line_set(GPIO_SDA, !!value);
	udelay(3);
	}

	static void set_str(u8 value)
	{
	gpio_line_set(GPIO_STR, !!value);
	udelay(3);
	}

	static inline void set_control(int line, int value)
	{
	if (value)
	control_value \|= (1 << line);
	else
	control_value &= ~(1 << line);
	}


	static void output_control(void)
	{
	int i;

	gpio_line_config(GPIO_SCL, IXP4XX_GPIO_OUT);
	gpio_line_config(GPIO_SDA, IXP4XX_GPIO_OUT);

	for (i = 0; i < 8; i++) {
	set_scl(0);
	set_sda(control_value & (0x80 >> i)); /* MSB first */
	set_scl(1); /* active edge */
	}

	set_str(1);
	set_str(0);

	set_scl(0);
	set_sda(1); /* Be ready for START */
	set_scl(1);
	}


	static void (set_carrier_cb_tab[2])(void pdev, int carrier);

	static int hss_set_clock(int port, unsigned int clock_type)
	{
	int ctrl_int = port ? CONTROL_HSS1_CLK_INT : CONTROL_HSS0_CLK_INT;

	switch (clock_type) {
	case CLOCK_DEFAULT:
	case CLOCK_EXT:
	set_control(ctrl_int, 0);
	output_control();
	return CLOCK_EXT;

	case CLOCK_INT:
	set_control(ctrl_int, 1);
	output_control();
	return CLOCK_INT;

	default:
	return -EINVAL;
	}
	}

	static irqreturn_t hss_dcd_irq(int irq, void *pdev)
	{
	int i, port = (irq == IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N));
	gpio_line_get(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N, &i);
	set_carrier_cb_tab[port](pdev, !i);
	return IRQ_HANDLED;
	}


	static int hss_open(int port, void *pdev,
	void (set_carrier_cb)(void pdev, int carrier))
	{
	int i, irq;

	if (!port)
	irq = IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N);
	else
	irq = IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N);

	gpio_line_get(port ? GPIO_HSS1_DCD_N : GPIO_HSS0_DCD_N, &i);
	set_carrier_cb(pdev, !i);

	set_carrier_cb_tab[!!port] = set_carrier_cb;

	if ((i = request_irq(irq, hss_dcd_irq, 0, "IXP4xx HSS", pdev)) != 0) {
	printk(KERN_ERR "ixp4xx_hss: failed to request IRQ%i (%i)\n",
	irq, i);
	return i;
	}

	set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 0);
	output_control();
	gpio_line_set(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 0);
	return 0;
	}

	static void hss_close(int port, void *pdev)
	{
	free_irq(port ? IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N) :
	IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N), pdev);
	set_carrier_cb_tab[!!port] = NULL; /* catch bugs */

	set_control(port ? CONTROL_HSS1_DTR_N : CONTROL_HSS0_DTR_N, 1);
	output_control();
	gpio_line_set(port ? GPIO_HSS1_RTS_N : GPIO_HSS0_RTS_N, 1);
	}


	/* Flash memory */
	static struct flash_platform_data flash_data = {
	.map_name = "cfi_probe",
	.width = 2,
	};

	static struct resource flash_resource = {
	.flags = IORESOURCE_MEM,
	};

	static struct platform_device device_flash = {
	.name = "IXP4XX-Flash",
	.id = 0,
	.dev = { .platform_data = &flash_data },
	.num_resources = 1,
	.resource = &flash_resource,
	};


	/* I^2C interface */
	static struct i2c_gpio_platform_data i2c_data = {
	.sda_pin = GPIO_SDA,
	.scl_pin = GPIO_SCL,
	};

	static struct platform_device device_i2c = {
	.name = "i2c-gpio",
	.id = 0,
	.dev = { .platform_data = &i2c_data },
	};


	/* IXP425 2 UART ports */
	static struct resource uart_resources[] = {
	{
	.start = IXP4XX_UART1_BASE_PHYS,
	.end = IXP4XX_UART1_BASE_PHYS + 0x0fff,
	.flags = IORESOURCE_MEM,
	},
	{
	.start = IXP4XX_UART2_BASE_PHYS,
	.end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
	.flags = IORESOURCE_MEM,
	}
	};

	static struct plat_serial8250_port uart_data[] = {
	{
	.mapbase = IXP4XX_UART1_BASE_PHYS,
	.membase = (char __iomem *)IXP4XX_UART1_BASE_VIRT +
	REG_OFFSET,
	.irq = IRQ_IXP4XX_UART1,
	.flags = UPF_BOOT_AUTOCONF \| UPF_SKIP_TEST,
	.iotype = UPIO_MEM,
	.regshift = 2,
	.uartclk = IXP4XX_UART_XTAL,
	},
	{
	.mapbase = IXP4XX_UART2_BASE_PHYS,
	.membase = (char __iomem *)IXP4XX_UART2_BASE_VIRT +
	REG_OFFSET,
	.irq = IRQ_IXP4XX_UART2,
	.flags = UPF_BOOT_AUTOCONF \| UPF_SKIP_TEST,
	.iotype = UPIO_MEM,
	.regshift = 2,
	.uartclk = IXP4XX_UART_XTAL,
	},
	{ },
	};

	static struct platform_device device_uarts = {
	.name = "serial8250",
	.id = PLAT8250_DEV_PLATFORM,
	.dev.platform_data = uart_data,
	.num_resources = 2,
	.resource = uart_resources,
	};


	/* Built-in 10/100 Ethernet MAC interfaces */
	static struct eth_plat_info eth_plat[] = {
	{
	.phy = 0,
	.rxq = 3,
	.txreadyq = 32,
	}, {
	.phy = 1,
	.rxq = 4,
	.txreadyq = 33,
	}
	};

	static struct platform_device device_eth_tab[] = {
	{
	.name = "ixp4xx_eth",
	.id = IXP4XX_ETH_NPEB,
	.dev.platform_data = eth_plat,
	}, {
	.name = "ixp4xx_eth",
	.id = IXP4XX_ETH_NPEC,
	.dev.platform_data = eth_plat + 1,
	}
	};


	/* IXP425 2 synchronous serial ports */
	static struct hss_plat_info hss_plat[] = {
	{
	.set_clock = hss_set_clock,
	.open = hss_open,
	.close = hss_close,
	.txreadyq = 34,
	}, {
	.set_clock = hss_set_clock,
	.open = hss_open,
	.close = hss_close,
	.txreadyq = 35,
	}
	};

	static struct platform_device device_hss_tab[] = {
	{
	.name = "ixp4xx_hss",
	.id = 0,
	.dev.platform_data = hss_plat,
	}, {
	.name = "ixp4xx_hss",
	.id = 1,
	.dev.platform_data = hss_plat + 1,
	}
	};


	static struct platform_device *device_tab[6] __initdata = {
	&device_flash, /* index 0 */
	};

	static inline u8 __init flash_readb(u8 __iomem *flash, u32 addr)
	{
	#ifdef __ARMEB__
	return __raw_readb(flash + addr);
	#else
	return __raw_readb(flash + (addr ^ 3));
	#endif
	}

	static inline u16 __init flash_readw(u8 __iomem *flash, u32 addr)
	{
	#ifdef __ARMEB__
	return __raw_readw(flash + addr);
	#else
	return __raw_readw(flash + (addr ^ 2));
	#endif
	}

	static void __init gmlr_init(void)
	{
	u8 __iomem *flash;
	int i, devices = 1; /* flash */

	ixp4xx_sys_init();

	if ((flash = ioremap(IXP4XX_EXP_BUS_BASE_PHYS, 0x80)) == NULL)
	printk(KERN_ERR "goramo-mlr: unable to access system"
	" configuration data\n");
	else {
	system_rev = __raw_readl(flash + CFG_REV);
	hw_bits = __raw_readl(flash + CFG_HW_BITS);

	for (i = 0; i < ETH_ALEN; i++) {
	eth_plat[0].hwaddr[i] =
	flash_readb(flash, CFG_ETH0_ADDRESS + i);
	eth_plat[1].hwaddr[i] =
	flash_readb(flash, CFG_ETH1_ADDRESS + i);
	}

	__raw_writew(FLASH_CMD_READ_ID, flash);
	system_serial_high = flash_readw(flash, FLASH_SER_OFF);
	system_serial_high <<= 16;
	system_serial_high \|= flash_readw(flash, FLASH_SER_OFF + 2);
	system_serial_low = flash_readw(flash, FLASH_SER_OFF + 4);
	system_serial_low <<= 16;
	system_serial_low \|= flash_readw(flash, FLASH_SER_OFF + 6);
	__raw_writew(FLASH_CMD_READ_ARRAY, flash);

	iounmap(flash);
	}

	switch (hw_bits & (CFG_HW_HAS_UART0 \| CFG_HW_HAS_UART1)) {
	case CFG_HW_HAS_UART0:
	memset(&uart_data[1], 0, sizeof(uart_data[1]));
	device_uarts.num_resources = 1;
	break;

	case CFG_HW_HAS_UART1:
	device_uarts.dev.platform_data = &uart_data[1];
	device_uarts.resource = &uart_resources[1];
	device_uarts.num_resources = 1;
	break;
	}
	if (hw_bits & (CFG_HW_HAS_UART0 \| CFG_HW_HAS_UART1))
	device_tab[devices++] = &device_uarts; /* max index 1 */

	if (hw_bits & CFG_HW_HAS_ETH0)
	device_tab[devices++] = &device_eth_tab[0]; /* max index 2 */
	if (hw_bits & CFG_HW_HAS_ETH1)
	device_tab[devices++] = &device_eth_tab[1]; /* max index 3 */

	if (hw_bits & CFG_HW_HAS_HSS0)
	device_tab[devices++] = &device_hss_tab[0]; /* max index 4 */
	if (hw_bits & CFG_HW_HAS_HSS1)
	device_tab[devices++] = &device_hss_tab[1]; /* max index 5 */

	if (hw_bits & CFG_HW_HAS_EEPROM)
	device_tab[devices++] = &device_i2c; /* max index 6 */

	gpio_line_config(GPIO_SCL, IXP4XX_GPIO_OUT);
	gpio_line_config(GPIO_SDA, IXP4XX_GPIO_OUT);
	gpio_line_config(GPIO_STR, IXP4XX_GPIO_OUT);
	gpio_line_config(GPIO_HSS0_RTS_N, IXP4XX_GPIO_OUT);
	gpio_line_config(GPIO_HSS1_RTS_N, IXP4XX_GPIO_OUT);
	gpio_line_config(GPIO_HSS0_DCD_N, IXP4XX_GPIO_IN);
	gpio_line_config(GPIO_HSS1_DCD_N, IXP4XX_GPIO_IN);
	irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_HSS0_DCD_N), IRQ_TYPE_EDGE_BOTH);
	irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_HSS1_DCD_N), IRQ_TYPE_EDGE_BOTH);

	set_control(CONTROL_HSS0_DTR_N, 1);
	set_control(CONTROL_HSS1_DTR_N, 1);
	set_control(CONTROL_EEPROM_WC_N, 1);
	set_control(CONTROL_PCI_RESET_N, 1);
	output_control();

	msleep(1); /* Wait for PCI devices to initialize */

	flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
	flash_resource.end = IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;

	platform_add_devices(device_tab, devices);
	}


	#ifdef CONFIG_PCI
	static void __init gmlr_pci_preinit(void)
	{
	irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHA), IRQ_TYPE_LEVEL_LOW);
	irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHB), IRQ_TYPE_LEVEL_LOW);
	irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_NEC), IRQ_TYPE_LEVEL_LOW);
	irq_set_irq_type(IXP4XX_GPIO_IRQ(GPIO_IRQ_MPCI), IRQ_TYPE_LEVEL_LOW);
	ixp4xx_pci_preinit();
	}

	static void __init gmlr_pci_postinit(void)
	{
	if ((hw_bits & CFG_HW_USB_PORTS) >= 2 &&
	(hw_bits & CFG_HW_USB_PORTS) < 5) {
	/* need to adjust number of USB ports on NEC chip */
	u32 value, addr = BIT(32 - SLOT_NEC) \| 0xE0;
	if (!ixp4xx_pci_read(addr, NP_CMD_CONFIGREAD, &value)) {
	value &= ~7;
	value \|= (hw_bits & CFG_HW_USB_PORTS);
	ixp4xx_pci_write(addr, NP_CMD_CONFIGWRITE, value);
	}
	}
	}

	static int __init gmlr_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
	{
	switch(slot) {
	case SLOT_ETHA: return IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHA);
	case SLOT_ETHB: return IXP4XX_GPIO_IRQ(GPIO_IRQ_ETHB);
	case SLOT_NEC: return IXP4XX_GPIO_IRQ(GPIO_IRQ_NEC);
	default: return IXP4XX_GPIO_IRQ(GPIO_IRQ_MPCI);
	}
	}

	static struct hw_pci gmlr_hw_pci __initdata = {
	.nr_controllers = 1,
	.preinit = gmlr_pci_preinit,
	.postinit = gmlr_pci_postinit,
	.swizzle = pci_std_swizzle,
	.setup = ixp4xx_setup,
	.scan = ixp4xx_scan_bus,
	.map_irq = gmlr_map_irq,
	};

	static int __init gmlr_pci_init(void)
	{
	if (machine_is_goramo_mlr() &&
	(hw_bits & (CFG_HW_USB_PORTS \| CFG_HW_HAS_PCI_SLOT)))
	pci_common_init(&gmlr_hw_pci);
	return 0;
	}

	subsys_initcall(gmlr_pci_init);
	#endif /* CONFIG_PCI */


	MACHINE_START(GORAMO_MLR, "MultiLink")
	/* Maintainer: Krzysztof Halasa */
	.map_io = ixp4xx_map_io,
	.init_irq = ixp4xx_init_irq,
	.timer = &ixp4xx_timer,
	.atag_offset = 0x100,
	.init_machine = gmlr_init,
	#if defined(CONFIG_PCI)
	.dma_zone_size = SZ_64M,
	#endif
	.restart = ixp4xx_restart,
	MACHINE_END