1 files changed, 334 insertions, 0 deletions

diff --git a/drivers/net/ixp2000/pm3386.c b/drivers/net/ixp2000/pm3386.c
new file mode 100644
index 000000000000..5c7ab7564053
--- /dev/null
+++ b/drivers/net/ixp2000/pm3386.c
@@ -0,0 +1,334 @@
+/*
+ * 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);
+}
+
+
+void pm3386_reset(void)
+{
+        u8 mac[3][6];
+
+        /* Save programmed MAC addresses.  */
+        pm3386_get_mac(0, mac[0]);
+        pm3386_get_mac(1, mac[1]);
+        pm3386_get_mac(2, mac[2]);
+
+        /* Assert analog and digital reset.  */
+        pm3386_reg_write(0, 0x002, 0x0060);
+        pm3386_reg_write(1, 0x002, 0x0060);
+        mdelay(1);
+
+        /* Deassert analog reset.  */
+        pm3386_reg_write(0, 0x002, 0x0062);
+        pm3386_reg_write(1, 0x002, 0x0062);
+        mdelay(10);
+
+        /* Deassert digital reset.  */
+        pm3386_reg_write(0, 0x002, 0x0063);
+        pm3386_reg_write(1, 0x002, 0x0063);
+        mdelay(10);
+
+        /* Restore programmed MAC addresses.  */
+        pm3386_set_mac(0, mac[0]);
+        pm3386_set_mac(1, mac[1]);
+        pm3386_set_mac(2, mac[2]);
+
+        /* Disable carrier on all ports.  */
+        pm3386_set_carrier(0, 0);
+        pm3386_set_carrier(1, 0);
+        pm3386_set_carrier(2, 0);
+}
+
+static u16 swaph(u16 x)
+{
+        return ((x << 8) | (x >> 8)) & 0xffff;
+}
+
+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");