diff options
Diffstat (limited to 'drivers/net/ethernet/xscale/ixp2000/pm3386.c')
| -rw-r--r-- | drivers/net/ethernet/xscale/ixp2000/pm3386.c | 351 |
1 files changed, 351 insertions, 0 deletions
diff --git a/drivers/net/ethernet/xscale/ixp2000/pm3386.c b/drivers/net/ethernet/xscale/ixp2000/pm3386.c new file mode 100644 index 00000000000..e08d3f9863b --- /dev/null +++ b/drivers/net/ethernet/xscale/ixp2000/pm3386.c @@ -0,0 +1,351 @@ +/* + * 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"); |