1 files changed, 137 insertions, 0 deletions

diff --git a/drivers/net/ixp2000/caleb.c b/drivers/net/ixp2000/caleb.c
new file mode 100644
index 000000000000..3595e107df22
--- /dev/null
+++ b/drivers/net/ixp2000/caleb.c
@@ -0,0 +1,137 @@
+/*
+ * Helper functions for the SPI-3 bridge FPGA 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 <asm/io.h>
+#include "caleb.h"
+
+#define CALEB_IDLO              0x00
+#define CALEB_IDHI              0x01
+#define CALEB_RID               0x02
+#define CALEB_RESET             0x03
+#define CALEB_INTREN0           0x04
+#define CALEB_INTREN1           0x05
+#define CALEB_INTRSTAT0         0x06
+#define CALEB_INTRSTAT1         0x07
+#define CALEB_PORTEN            0x08
+#define CALEB_BURST             0x09
+#define CALEB_PORTPAUS          0x0A
+#define CALEB_PORTPAUSD         0x0B
+#define CALEB_PHY0RX            0x10
+#define CALEB_PHY1RX            0x11
+#define CALEB_PHY0TX            0x12
+#define CALEB_PHY1TX            0x13
+#define CALEB_IXPRX_HI_CNTR     0x15
+#define CALEB_PHY0RX_HI_CNTR    0x16
+#define CALEB_PHY1RX_HI_CNTR    0x17
+#define CALEB_IXPRX_CNTR        0x18
+#define CALEB_PHY0RX_CNTR       0x19
+#define CALEB_PHY1RX_CNTR       0x1A
+#define CALEB_IXPTX_CNTR        0x1B
+#define CALEB_PHY0TX_CNTR       0x1C
+#define CALEB_PHY1TX_CNTR       0x1D
+#define CALEB_DEBUG0            0x1E
+#define CALEB_DEBUG1            0x1F
+
+
+static u8 caleb_reg_read(int reg)
+{
+        u8 value;
+
+        value = *((volatile u8 *)(ENP2611_CALEB_VIRT_BASE + reg));
+
+//      printk(KERN_INFO "caleb_reg_read(%d) = %.2x\n", reg, value);
+
+        return value;
+}
+
+static void caleb_reg_write(int reg, u8 value)
+{
+        u8 dummy;
+
+//      printk(KERN_INFO "caleb_reg_write(%d, %.2x)\n", reg, value);
+
+        *((volatile u8 *)(ENP2611_CALEB_VIRT_BASE + reg)) = value;
+
+        dummy = *((volatile u8 *)ENP2611_CALEB_VIRT_BASE);
+        __asm__ __volatile__("mov %0, %0" : "+r" (dummy));
+}
+
+
+void caleb_reset(void)
+{
+        /*
+         * Perform a chip reset.
+         */
+        caleb_reg_write(CALEB_RESET, 0x02);
+        udelay(1);
+
+        /*
+         * Enable all interrupt sources.  This is needed to get
+         * meaningful results out of the status bits (register 6
+         * and 7.)
+         */
+        caleb_reg_write(CALEB_INTREN0, 0xff);
+        caleb_reg_write(CALEB_INTREN1, 0x07);
+
+        /*
+         * Set RX and TX FIFO thresholds to 1.5kb.
+         */
+        caleb_reg_write(CALEB_PHY0RX, 0x11);
+        caleb_reg_write(CALEB_PHY1RX, 0x11);
+        caleb_reg_write(CALEB_PHY0TX, 0x11);
+        caleb_reg_write(CALEB_PHY1TX, 0x11);
+
+        /*
+         * Program SPI-3 burst size.
+         */
+        caleb_reg_write(CALEB_BURST, 0);        // 64-byte RBUF mpackets
+//      caleb_reg_write(CALEB_BURST, 1);        // 128-byte RBUF mpackets
+//      caleb_reg_write(CALEB_BURST, 2);        // 256-byte RBUF mpackets
+}
+
+void caleb_enable_rx(int port)
+{
+        u8 temp;
+
+        temp = caleb_reg_read(CALEB_PORTEN);
+        temp |= 1 << port;
+        caleb_reg_write(CALEB_PORTEN, temp);
+}
+
+void caleb_disable_rx(int port)
+{
+        u8 temp;
+
+        temp = caleb_reg_read(CALEB_PORTEN);
+        temp &= ~(1 << port);
+        caleb_reg_write(CALEB_PORTEN, temp);
+}
+
+void caleb_enable_tx(int port)
+{
+        u8 temp;
+
+        temp = caleb_reg_read(CALEB_PORTEN);
+        temp |= 1 << (port + 4);
+        caleb_reg_write(CALEB_PORTEN, temp);
+}
+
+void caleb_disable_tx(int port)
+{
+        u8 temp;
+
+        temp = caleb_reg_read(CALEB_PORTEN);
+        temp &= ~(1 << (port + 4));
+        caleb_reg_write(CALEB_PORTEN, temp);
+}