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linux/drivers/net/ixp2000/pm3386.c

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/*
* Helper functions for the PM3386s on the Radisys ENP2611
* Copyright (C) 2004, 2005 Lennert Buytenhek <buytenh@wantstofly.org>
* Dedicated to Marija Kulikova.
*
* 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/module.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <asm/io.h>
#include "pm3386.h"
/*
* Read from register 'reg' of PM3386 device 'pm'.
*/
static u16 pm3386_reg_read(int pm, int reg)
{
void *_reg;
u16 value;
_reg = (void *)ENP2611_PM3386_0_VIRT_BASE;
if (pm == 1)
_reg = (void *)ENP2611_PM3386_1_VIRT_BASE;
value = *((volatile u16 *)(_reg + (reg << 1)));
// printk(KERN_INFO "pm3386_reg_read(%d, %.3x) = %.8x\n", pm, reg, value);
return value;
}
/*
* Write to register 'reg' of PM3386 device 'pm', and perform
* a readback from the identification register.
*/
static void pm3386_reg_write(int pm, int reg, u16 value)
{
void *_reg;
u16 dummy;
// printk(KERN_INFO "pm3386_reg_write(%d, %.3x, %.8x)\n", pm, reg, value);
_reg = (void *)ENP2611_PM3386_0_VIRT_BASE;
if (pm == 1)
_reg = (void *)ENP2611_PM3386_1_VIRT_BASE;
*((volatile u16 *)(_reg + (reg << 1))) = value;
dummy = *((volatile u16 *)_reg);
__asm__ __volatile__("mov %0, %0" : "+r" (dummy));
}
/*
* Read from port 'port' register 'reg', where the registers
* for the different ports are 'spacing' registers apart.
*/
static u16 pm3386_port_reg_read(int port, int _reg, int spacing)
{
int reg;
reg = _reg;
if (port & 1)
reg += spacing;
return pm3386_reg_read(port >> 1, reg);
}
/*
* Write to port 'port' register 'reg', where the registers
* for the different ports are 'spacing' registers apart.
*/
static void pm3386_port_reg_write(int port, int _reg, int spacing, u16 value)
{
int reg;
reg = _reg;
if (port & 1)
reg += spacing;
pm3386_reg_write(port >> 1, reg, value);
}
int pm3386_secondary_present(void)
{
return pm3386_reg_read(1, 0) == 0x3386;
}
void pm3386_reset(void)
{
u8 mac[3][6];
int secondary;
secondary = pm3386_secondary_present();
/* Save programmed MAC addresses. */
pm3386_get_mac(0, mac[0]);
pm3386_get_mac(1, mac[1]);
if (secondary)
pm3386_get_mac(2, mac[2]);
/* Assert analog and digital reset. */
pm3386_reg_write(0, 0x002, 0x0060);
if (secondary)
pm3386_reg_write(1, 0x002, 0x0060);
mdelay(1);
/* Deassert analog reset. */
pm3386_reg_write(0, 0x002, 0x0062);
if (secondary)
pm3386_reg_write(1, 0x002, 0x0062);
mdelay(10);
/* Deassert digital reset. */
pm3386_reg_write(0, 0x002, 0x0063);
if (secondary)
pm3386_reg_write(1, 0x002, 0x0063);
mdelay(10);
/* Restore programmed MAC addresses. */
pm3386_set_mac(0, mac[0]);
pm3386_set_mac(1, mac[1]);
if (secondary)
pm3386_set_mac(2, mac[2]);
/* Disable carrier on all ports. */
pm3386_set_carrier(0, 0);
pm3386_set_carrier(1, 0);
if (secondary)
pm3386_set_carrier(2, 0);
}
static u16 swaph(u16 x)
{
return ((x << 8) | (x >> 8)) & 0xffff;
}
int pm3386_port_count(void)
{
return 2 + pm3386_secondary_present();
}
void pm3386_init_port(int port)
{
int pm = port >> 1;
/*
* Work around ENP2611 bootloader programming MAC address
* in reverse.
*/
if (pm3386_port_reg_read(port, 0x30a, 0x100) == 0x0000 &&
(pm3386_port_reg_read(port, 0x309, 0x100) & 0xff00) == 0x5000) {
u16 temp[3];
temp[0] = pm3386_port_reg_read(port, 0x308, 0x100);
temp[1] = pm3386_port_reg_read(port, 0x309, 0x100);
temp[2] = pm3386_port_reg_read(port, 0x30a, 0x100);
pm3386_port_reg_write(port, 0x308, 0x100, swaph(temp[2]));
pm3386_port_reg_write(port, 0x309, 0x100, swaph(temp[1]));
pm3386_port_reg_write(port, 0x30a, 0x100, swaph(temp[0]));
}
/*
* Initialise narrowbanding mode. See application note 2010486
* for more information. (@@@ We also need to issue a reset
* when ROOL or DOOL are detected.)
*/
pm3386_port_reg_write(port, 0x708, 0x10, 0xd055);
udelay(500);
pm3386_port_reg_write(port, 0x708, 0x10, 0x5055);
/*
* SPI-3 ingress block. Set 64 bytes SPI-3 burst size
* towards SPI-3 bridge.
*/
pm3386_port_reg_write(port, 0x122, 0x20, 0x0002);
/*
* Enable ingress protocol checking, and soft reset the
* SPI-3 ingress block.
*/
pm3386_reg_write(pm, 0x103, 0x0003);
while (!(pm3386_reg_read(pm, 0x103) & 0x80))
;
/*
* SPI-3 egress block. Gather 12288 bytes of the current
* packet in the TX fifo before initiating transmit on the
* SERDES interface. (Prevents TX underflows.)
*/
pm3386_port_reg_write(port, 0x221, 0x20, 0x0007);
/*
* Enforce odd parity from the SPI-3 bridge, and soft reset
* the SPI-3 egress block.
*/
pm3386_reg_write(pm, 0x203, 0x000d & ~(4 << (port & 1)));
while ((pm3386_reg_read(pm, 0x203) & 0x000c) != 0x000c)
;
/*
* EGMAC block. Set this channels to reject long preambles,
* not send or transmit PAUSE frames, enable preamble checking,
* disable frame length checking, enable FCS appending, enable
* TX frame padding.
*/
pm3386_port_reg_write(port, 0x302, 0x100, 0x0113);
/*
* Soft reset the EGMAC block.
*/
pm3386_port_reg_write(port, 0x301, 0x100, 0x8000);
pm3386_port_reg_write(port, 0x301, 0x100, 0x0000);
/*
* Auto-sense autonegotiation status.
*/
pm3386_port_reg_write(port, 0x306, 0x100, 0x0100);
/*
* Allow reception of jumbo frames.
*/
pm3386_port_reg_write(port, 0x310, 0x100, 9018);
/*
* Allow transmission of jumbo frames.
*/
pm3386_port_reg_write(port, 0x336, 0x100, 9018);
/* @@@ Should set 0x337/0x437 (RX forwarding threshold.) */
/*
* Set autonegotiation parameters to 'no PAUSE, full duplex.'
*/
pm3386_port_reg_write(port, 0x31c, 0x100, 0x0020);
/*
* Enable and restart autonegotiation.
*/
pm3386_port_reg_write(port, 0x318, 0x100, 0x0003);
pm3386_port_reg_write(port, 0x318, 0x100, 0x0002);
}
void pm3386_get_mac(int port, u8 *mac)
{
u16 temp;
temp = pm3386_port_reg_read(port, 0x308, 0x100);
mac[0] = temp & 0xff;
mac[1] = (temp >> 8) & 0xff;
temp = pm3386_port_reg_read(port, 0x309, 0x100);
mac[2] = temp & 0xff;
mac[3] = (temp >> 8) & 0xff;
temp = pm3386_port_reg_read(port, 0x30a, 0x100);
mac[4] = temp & 0xff;
mac[5] = (temp >> 8) & 0xff;
}
void pm3386_set_mac(int port, u8 *mac)
{
pm3386_port_reg_write(port, 0x308, 0x100, (mac[1] << 8) | mac[0]);
pm3386_port_reg_write(port, 0x309, 0x100, (mac[3] << 8) | mac[2]);
pm3386_port_reg_write(port, 0x30a, 0x100, (mac[5] << 8) | mac[4]);
}
static u32 pm3386_get_stat(int port, u16 base)
{
u32 value;
value = pm3386_port_reg_read(port, base, 0x100);
value |= pm3386_port_reg_read(port, base + 1, 0x100) << 16;
return value;
}
void pm3386_get_stats(int port, struct net_device_stats *stats)
{
/*
* Snapshot statistics counters.
*/
pm3386_port_reg_write(port, 0x500, 0x100, 0x0001);
while (pm3386_port_reg_read(port, 0x500, 0x100) & 0x0001)
;
memset(stats, 0, sizeof(*stats));
stats->rx_packets = pm3386_get_stat(port, 0x510);
stats->tx_packets = pm3386_get_stat(port, 0x590);
stats->rx_bytes = pm3386_get_stat(port, 0x514);
stats->tx_bytes = pm3386_get_stat(port, 0x594);
/* @@@ Add other stats. */
}
void pm3386_set_carrier(int port, int state)
{
pm3386_port_reg_write(port, 0x703, 0x10, state ? 0x1001 : 0x0000);
}
int pm3386_is_link_up(int port)
{
u16 temp;
temp = pm3386_port_reg_read(port, 0x31a, 0x100);
temp = pm3386_port_reg_read(port, 0x31a, 0x100);
return !!(temp & 0x0002);
}
void pm3386_enable_rx(int port)
{
u16 temp;
temp = pm3386_port_reg_read(port, 0x303, 0x100);
temp |= 0x1000;
pm3386_port_reg_write(port, 0x303, 0x100, temp);
}
void pm3386_disable_rx(int port)
{
u16 temp;
temp = pm3386_port_reg_read(port, 0x303, 0x100);
temp &= 0xefff;
pm3386_port_reg_write(port, 0x303, 0x100, temp);
}
void pm3386_enable_tx(int port)
{
u16 temp;
temp = pm3386_port_reg_read(port, 0x303, 0x100);
temp |= 0x4000;
pm3386_port_reg_write(port, 0x303, 0x100, temp);
}
void pm3386_disable_tx(int port)
{
u16 temp;
temp = pm3386_port_reg_read(port, 0x303, 0x100);
temp &= 0xbfff;
pm3386_port_reg_write(port, 0x303, 0x100, temp);
}
MODULE_LICENSE("GPL");
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