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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 */
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