path: root/arch/x86/mach-voyager/voyager_cat.c

/* -*- mode: c; c-basic-offset: 8 -*- */

/* Copyright (C) 1999,2001
 *
 * Author: J.E.J.Bottomley@HansenPartnership.com
 *
 * This file contains all the logic for manipulating the CAT bus
 * in a level 5 machine.
 *
 * The CAT bus is a serial configuration and test bus.  Its primary
 * uses are to probe the initial configuration of the system and to
 * diagnose error conditions when a system interrupt occurs.  The low
 * level interface is fairly primitive, so most of this file consists
 * of bit shift manipulations to send and receive packets on the
 * serial bus */

#include <linux/types.h>
#include <linux/completion.h>
#include <linux/sched.h>
#include <asm/voyager.h>
#include <asm/vic.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <asm/io.h>

#ifdef VOYAGER_CAT_DEBUG
#define CDEBUG(x)	printk x
#else
#define CDEBUG(x)
#endif

/* the CAT command port */
#define CAT_CMD		(sspb + 0xe)
/* the CAT data port */
#define CAT_DATA	(sspb + 0xd)

/* the internal cat functions */
static void cat_pack(__u8 * msg, __u16 start_bit, __u8 * data, __u16 num_bits);
static void cat_unpack(__u8 * msg, __u16 start_bit, __u8 * data,
		       __u16 num_bits);
static void cat_build_header(__u8 * header, const __u16 len,
			     const __u16 smallest_reg_bits,
			     const __u16 longest_reg_bits);
static int cat_sendinst(voyager_module_t * modp, voyager_asic_t * asicp,
			__u8 reg, __u8 op);
static int cat_getdata(voyager_module_t * modp, voyager_asic_t * asicp,
		       __u8 reg, __u8 * value);
static int cat_shiftout(__u8 * data, __u16 data_bytes, __u16 header_bytes,
			__u8 pad_bits);
static int cat_write(voyager_module_t * modp, voyager_asic_t * asicp, __u8 reg,
		     __u8 value);
static int cat_read(voyager_module_t * modp, voyager_asic_t * asicp, __u8 reg,
		    __u8 * value);
static int cat_subread(voyager_module_t * modp, voyager_asic_t * asicp,
		       __u16 offset, __u16 len, void *buf);
static int cat_senddata(voyager_module_t * modp, voyager_asic_t * asicp,
			__u8 reg, __u8 value);
static int cat_disconnect(voyager_module_t * modp, voyager_asic_t * asicp);
static int cat_connect(voyager_module_t * modp, voyager_asic_t * asicp);

static inline const char *cat_module_name(int module_id)
{
	switch (module_id) {
	case 0x10:
		return "Processor Slot 0";
	case 0x11:
		return "Processor Slot 1";
	case 0x12:
		return "Processor Slot 2";
	case 0x13:
		return "Processor Slot 4";
	case 0x14:
		return "Memory Slot 0";
	case 0x15:
		return "Memory Slot 1";
	case 0x18:
		return "Primary Microchannel";
	case 0x19:
		return "Secondary Microchannel";
	case 0x1a:
		return "Power Supply Interface";
	case 0x1c:
		return "Processor Slot 5";
	case 0x1d:
		return "Processor Slot 6";
	case 0x1e:
		return "Processor Slot 7";
	case 0x1f:
		return "