2 * Helper functions for the SPI-3 bridge FPGA on the Radisys ENP2611
3 * Copyright (C) 2004, 2005 Lennert Buytenhek <buytenh@wantstofly.org>
4 * Dedicated to Marija Kulikova.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/config.h>
13 #include <linux/module.h>
14 #include <linux/delay.h>
18 #define CALEB_IDLO 0x00
19 #define CALEB_IDHI 0x01
20 #define CALEB_RID 0x02
21 #define CALEB_RESET 0x03
22 #define CALEB_INTREN0 0x04
23 #define CALEB_INTREN1 0x05
24 #define CALEB_INTRSTAT0 0x06
25 #define CALEB_INTRSTAT1 0x07
26 #define CALEB_PORTEN 0x08
27 #define CALEB_BURST 0x09
28 #define CALEB_PORTPAUS 0x0A
29 #define CALEB_PORTPAUSD 0x0B
30 #define CALEB_PHY0RX 0x10
31 #define CALEB_PHY1RX 0x11
32 #define CALEB_PHY0TX 0x12
33 #define CALEB_PHY1TX 0x13
34 #define CALEB_IXPRX_HI_CNTR 0x15
35 #define CALEB_PHY0RX_HI_CNTR 0x16
36 #define CALEB_PHY1RX_HI_CNTR 0x17
37 #define CALEB_IXPRX_CNTR 0x18
38 #define CALEB_PHY0RX_CNTR 0x19
39 #define CALEB_PHY1RX_CNTR 0x1A
40 #define CALEB_IXPTX_CNTR 0x1B
41 #define CALEB_PHY0TX_CNTR 0x1C
42 #define CALEB_PHY1TX_CNTR 0x1D
43 #define CALEB_DEBUG0 0x1E
44 #define CALEB_DEBUG1 0x1F
47 static u8 caleb_reg_read(int reg)
51 value = *((volatile u8 *)(ENP2611_CALEB_VIRT_BASE + reg));
53 // printk(KERN_INFO "caleb_reg_read(%d) = %.2x\n", reg, value);
58 static void caleb_reg_write(int reg, u8 value)
62 // printk(KERN_INFO "caleb_reg_write(%d, %.2x)\n", reg, value);
64 *((volatile u8 *)(ENP2611_CALEB_VIRT_BASE + reg)) = value;
66 dummy = *((volatile u8 *)ENP2611_CALEB_VIRT_BASE);
67 __asm__ __volatile__("mov %0, %0" : "+r" (dummy));
71 void caleb_reset(void)
74 * Perform a chip reset.
76 caleb_reg_write(CALEB_RESET, 0x02);
80 * Enable all interrupt sources. This is needed to get
81 * meaningful results out of the status bits (register 6
84 caleb_reg_write(CALEB_INTREN0, 0xff);
85 caleb_reg_write(CALEB_INTREN1, 0x07);
88 * Set RX and TX FIFO thresholds to 1.5kb.
90 caleb_reg_write(CALEB_PHY0RX, 0x11);
91 caleb_reg_write(CALEB_PHY1RX, 0x11);
92 caleb_reg_write(CALEB_PHY0TX, 0x11);
93 caleb_reg_write(CALEB_PHY1TX, 0x11);
96 * Program SPI-3 burst size.
98 caleb_reg_write(CALEB_BURST, 0); // 64-byte RBUF mpackets
99 // caleb_reg_write(CALEB_BURST, 1); // 128-byte RBUF mpackets
100 // caleb_reg_write(CALEB_BURST, 2); // 256-byte RBUF mpackets
103 void caleb_enable_rx(int port)
107 temp = caleb_reg_read(CALEB_PORTEN);
109 caleb_reg_write(CALEB_PORTEN, temp);
112 void caleb_disable_rx(int port)
116 temp = caleb_reg_read(CALEB_PORTEN);
117 temp &= ~(1 << port);
118 caleb_reg_write(CALEB_PORTEN, temp);
121 void caleb_enable_tx(int port)
125 temp = caleb_reg_read(CALEB_PORTEN);
126 temp |= 1 << (port + 4);
127 caleb_reg_write(CALEB_PORTEN, temp);
130 void caleb_disable_tx(int port)
134 temp = caleb_reg_read(CALEB_PORTEN);
135 temp &= ~(1 << (port + 4));
136 caleb_reg_write(CALEB_PORTEN, temp);