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android_kernel_xiaomi_sm8350/drivers/net/ixp2000/pm3386.c
Lennert Buytenhek 1ea739a5f9 The ixp2000 driver for the enp2611 was developed on a board with 
three gigabit ports, but some enp2611 models only have two ports
(and only one onboard PM3386.)  The current driver assumes there
are always three ports and so it doesn't work on the two-port
version of the board at all.

This patch adds a bit of logic to the enp2611 driver to limit the
number of ports to 2 if the second PM3386 isn't detected.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
2006-05-15 12:25:29 -07:00

353 lines
8.1 KiB
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/config.h>
#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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