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Commit 62747cd2 authored by Akira Takeuchi's avatar Akira Takeuchi Committed by David Howells
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MN10300: ASB2364: Add support for SMSC911X and SMC911X 



Add support for SMSC911X and SMC911X for the ASB2364 unit.

Signed-off-by: default avatarAkira Takeuchi <takeuchi.akr@jp.panasonic.com>
Signed-off-by: default avatarKiyoshi Owada <owada.kiyoshi@jp.panasonic.com>
Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
cc: steve.glendinning@smsc.com
cc: netdev@vger.kernel.org
parent 6044cf1d

arch/mn10300/Kconfig

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@@ -117,6 +117,7 @@ config MN10300_UNIT_ASB2305 


config MN10300_UNIT_ASB2364

	bool "ASB2364"

	select SMSC911X_ARCH_HOOKS if SMSC911X



endchoice

arch/mn10300/include/asm/smsc911x.h

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#include <unit/smsc911x.h>

arch/mn10300/unit-asb2364/Makefile

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@@ -8,3 +8,5 @@ 
# Note 2! The CFLAGS definitions are now in the main makefile...



obj-y   := unit-init.o leds.o irq-fpga.o



obj-$(CONFIG_SMSC911X) += smsc911x.o

arch/mn10300/unit-asb2364/include/unit/smsc911x.h

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/* Support for the SMSC911x NIC

 *

 * Copyright (C) 2006 Matsushita Electric Industrial Co., Ltd.

 * All Rights Reserved.

 *

 * 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.

 */

#ifndef _ASM_UNIT_SMSC911X_H

#define _ASM_UNIT_SMSC911X_H



#include <linux/netdevice.h>

#include <proc/irq.h>

#include <unit/fpga-regs.h>



#define MN10300_USE_EXT_EEPROM





#define SMSC911X_BASE		0xA8000000UL

#define SMSC911X_BASE_END	0xA8000100UL

#define SMSC911X_IRQ		FPGA_LAN_IRQ



/*

 * Allow the FPGA to be initialised by the SMSC911x driver

 */

#undef SMSC_INITIALIZE

#define SMSC_INITIALIZE()					\

do {								\

	/* release reset */					\

	ASB2364_FPGA_REG_RESET_LAN = 0x0001;			\

	SyncExBus();						\

} while (0)



#ifdef MN10300_USE_EXT_EEPROM

#include <linux/delay.h>

#include <unit/clock.h>



#define EEPROM_ADDRESS	0xA0

#define MAC_OFFSET	0x0008

#define USE_IIC_CH	0	/* 0 or 1 */

#define IIC_OFFSET	(0x80000 * USE_IIC_CH)

#define IIC_DTRM	__SYSREG(0xd8400000 + IIC_OFFSET, u32)

#define IIC_DREC	__SYSREG(0xd8400004 + IIC_OFFSET, u32)

#define IIC_MYADD	__SYSREG(0xd8400008 + IIC_OFFSET, u32)

#define IIC_CLK		__SYSREG(0xd840000c + IIC_OFFSET, u32)

#define IIC_BRST	__SYSREG(0xd8400010 + IIC_OFFSET, u32)

#define IIC_HOLD	__SYSREG(0xd8400014 + IIC_OFFSET, u32)

#define IIC_BSTS	__SYSREG(0xd8400018 + IIC_OFFSET, u32)

#define IIC_ICR		__SYSREG(0xd4000080 + 4 * USE_IIC_CH, u16)



#define IIC_CLK_PLS	((unsigned short)(MN10300_IOCLK / 100000 - 1))

#define IIC_CLK_LOW	((unsigned short)(IIC_CLK_PLS / 2))



#define SYS_IIC_DTRM_Bit_STA	((unsigned short)0x0400)

#define SYS_IIC_DTRM_Bit_STO	((unsigned short)0x0200)

#define SYS_IIC_DTRM_Bit_ACK	((unsigned short)0x0100)

#define SYS_IIC_DTRM_Bit_DATA	((unsigned short)0x00FF)



static inline void POLL_INT_REQ(volatile u16 *icr)

{

	unsigned long flags;

	u16 tmp;



	while (!(*icr & GxICR_REQUEST))

		;

	flags = arch_local_cli_save();

	tmp = *icr;

	*icr = (tmp & GxICR_LEVEL) | GxICR_DETECT;

	tmp = *icr;

	arch_local_irq_restore(flags);

}



/*

 * Implement the SMSC911x hook for MAC address retrieval

 */

#undef smsc_get_mac

static inline int smsc_get_mac(struct net_device *dev)

{

	unsigned char *mac_buf = dev->dev_addr;

	int i;

	unsigned short value;

	unsigned int data;

	int mac_length = 6;

	int check;

	u16 orig_gicr, tmp;

	unsigned long flags;



	/* save original GnICR and clear GnICR.IE */

	flags = arch_local_cli_save();

	orig_gicr = IIC_ICR;

	IIC_ICR = orig_gicr & GxICR_LEVEL;

	tmp = IIC_ICR;

	arch_local_irq_restore(flags);



	IIC_MYADD = 0x00000008;

	IIC_CLK = (IIC_CLK_LOW << 16) + (IIC_CLK_PLS);

	/* bus hung recovery */



	while (1) {

		check = 0;

		for (i = 0; i < 3; i++) {

			if ((IIC_BSTS & 0x00000003) == 0x00000003)

				check++;

			udelay(3);

		}



		if (check == 3) {

			IIC_BRST = 0x00000003;

			break;

		} else {

			for (i = 0; i < 3; i++) {

				IIC_BRST = 0x00000002;

				udelay(8);

				IIC_BRST = 0x00000003;

				udelay(8);

			}

		}

	}



	IIC_BRST = 0x00000002;

	IIC_BRST = 0x00000003;



	value	=  SYS_IIC_DTRM_Bit_STA | SYS_IIC_DTRM_Bit_ACK;

	value	|= (((unsigned short)EEPROM_ADDRESS & SYS_IIC_DTRM_Bit_DATA) |

		    (unsigned short)0x0000);

	IIC_DTRM = value;

	POLL_INT_REQ(&IIC_ICR);



	/** send offset of MAC address in EEPROM **/

	IIC_DTRM = (unsigned char)((MAC_OFFSET & 0xFF00) >> 8);

	POLL_INT_REQ(&IIC_ICR);



	IIC_DTRM = (unsigned char)(MAC_OFFSET & 0x00FF);

	POLL_INT_REQ(&IIC_ICR);



	udelay(1000);



	value	=  SYS_IIC_DTRM_Bit_STA;

	value	|= (((unsigned short)EEPROM_ADDRESS & SYS_IIC_DTRM_Bit_DATA) |

		    (unsigned short)0x0001);

	IIC_DTRM = value;

	POLL_INT_REQ(&IIC_ICR);



	IIC_DTRM = 0x00000000;

	while (mac_length > 0) {

		POLL_INT_REQ(&IIC_ICR);



		data = IIC_DREC;

		mac_length--;

		if (mac_length == 0)

			value = 0x00000300;	/* stop IIC bus */

		else if (mac_length == 1)

			value = 0x00000100;	/* no ack */

		else

			value = 0x00000000;	/* ack */

		IIC_DTRM = value;

		*mac_buf++ = (unsigned char)(data & 0xff);

	}



	/* restore GnICR.LV and GnICR.IE */

	flags = arch_local_cli_save();

	IIC_ICR = (orig_gicr & (GxICR_LEVEL | GxICR_ENABLE));

	tmp = IIC_ICR;

	arch_local_irq_restore(flags);



	return 0;

}

#endif /* MN10300_USE_EXT_EEPROM */

#endif /* _ASM_UNIT_SMSC911X_H */

arch/mn10300/unit-asb2364/smsc911x.c

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/* Specification for the SMSC911x NIC

 *

 * Copyright (C) 2006 Matsushita Electric Industrial Co., Ltd.

 * All Rights Reserved.

 *

 * 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.

 */



#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/platform_device.h>

#include <linux/io.h>

#include <linux/ioport.h>

#include <linux/smsc911x.h>

#include <unit/smsc911x.h>



static struct smsc911x_platform_config smsc911x_config = {

	.irq_polarity	= SMSC911X_IRQ_POLARITY_ACTIVE_LOW,

	.irq_type	= SMSC911X_IRQ_TYPE_OPEN_DRAIN,

	.flags		= SMSC911X_USE_32BIT,

};



static struct resource smsc911x_resources[] = {

	[0] = {

		.start	= SMSC911X_BASE,

		.end	= SMSC911X_BASE_END,

		.flags	= IORESOURCE_MEM,

	},

	[1] = {

		.start	= SMSC911X_IRQ,

		.end	= SMSC911X_IRQ,

		.flags	= IORESOURCE_IRQ,

	},

};



static struct platform_device smsc911x_device = {

	.name		= "smsc911x",

	.id		= 0,

	.num_resources	= ARRAY_SIZE(smsc911x_resources),

	.resource	= smsc911x_resources,

	.dev		= {

		.platform_data = &smsc911x_config,

	}

};



/*

 * add platform devices

 */

static int __init unit_device_init(void)

{

	platform_device_register(&smsc911x_device);

	return 0;

}



device_initcall(unit_device_init);