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linux/arch/i386/mach-voyager/voyager_cat.c

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/* -*- mode: c; c-basic-offset: 8 -*- */
/* Copyright (C) 1999,2001
*
* Author: J.E.J.Bottomley@HansenPartnership.com
*
* linux/arch/i386/kernel/voyager_cat.c
*
* 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 "Processor Slot 8";
default:
return "Unknown Module";
}
}
static int sspb = 0; /* stores the super port location */
int voyager_8slot = 0; /* set to true if a 51xx monster */
voyager_module_t *voyager_cat_list;
/* the I/O port assignments for the VIC and QIC */
static struct resource vic_res = {
.name = "Voyager Interrupt Controller",
.start = 0xFC00,
.end = 0xFC6F
};
static struct resource qic_res = {
.name = "Quad Interrupt Controller",
.start = 0xFC70,
.end = 0xFCFF
};
/* This function is used to pack a data bit stream inside a message.
* It writes num_bits of the data buffer in msg starting at start_bit.
* Note: This function assumes that any unused bit in the data stream
* is set to zero so that the ors will work correctly */
static void
cat_pack(__u8 *msg, const __u16 start_bit, __u8 *data, const __u16 num_bits)
{
/* compute initial shift needed */
const __u16 offset = start_bit % BITS_PER_BYTE;
__u16 len = num_bits / BITS_PER_BYTE;
__u16 byte = start_bit / BITS_PER_BYTE;
__u16 residue = (num_bits % BITS_PER_BYTE) + offset;
int i;
/* adjust if we have more than a byte of residue */
if(residue >= BITS_PER_BYTE) {
residue -= BITS_PER_BYTE;
len++;
}
/* clear out the bits. We assume here that if len==0 then
* residue >= offset. This is always true for the catbus
* operations */
msg[byte] &= 0xff << (BITS_PER_BYTE - offset);
msg[byte++] |= data[0] >> offset;
if(len == 0)
return;
for(i = 1; i < len; i++)
msg[byte++] = (data[i-1] << (BITS_PER_BYTE - offset))
| (data[i] >> offset);
if(residue != 0) {
__u8 mask = 0xff >> residue;
__u8 last_byte = data[i-1] << (BITS_PER_BYTE - offset)
| (data[i] >> offset);
last_byte &= ~mask;
msg[byte] &= mask;
msg[byte] |= last_byte;
}
return;
}
/* unpack the data again (same arguments as cat_pack()). data buffer
* must be zero populated.
*
* Function: given a message string move to start_bit and copy num_bits into
* data (starting at bit 0 in data).
*/
static void
cat_unpack(__u8 *msg, const __u16 start_bit, __u8 *data, const __u16 num_bits)
{
/* compute initial shift needed */
const __u16 offset = start_bit % BITS_PER_BYTE;
__u16 len = num_bits / BITS_PER_BYTE;
const __u8 last_bits = num_bits % BITS_PER_BYTE;
__u16 byte = start_bit / BITS_PER_BYTE;
int i;
if(last_bits != 0)
len++;
/* special case: want < 8 bits from msg and we can get it from
* a single byte of the msg */
if(len == 0 && BITS_PER_BYTE - offset >= num_bits) {
data[0] = msg[byte] << offset;
data[0] &= 0xff >> (BITS_PER_BYTE - num_bits);
return;
}
for(i = 0; i < len; i++) {
/* this annoying if has to be done just in case a read of
* msg one beyond the array causes a panic */
if(offset != 0) {
data[i] = msg[byte++] << offset;
data[i] |= msg[byte] >> (BITS_PER_BYTE - offset);
}
else {
data[i] = msg[byte++];
}
}
/* do we need to truncate the final byte */
if(last_bits != 0) {
data[i-1] &= 0xff << (BITS_PER_BYTE - last_bits);
}
return;
}
static void
cat_build_header(__u8 *header, const __u16 len, const __u16 smallest_reg_bits,
const __u16 longest_reg_bits)
{
int i;
__u16 start_bit = (smallest_reg_bits - 1) % BITS_PER_BYTE;
__u8 *last_byte = &header[len - 1];
if(start_bit == 0)
start_bit = 1; /* must have at least one bit in the hdr */
for(i=0; i < len; i++)
header[i] = 0;
for(i = start_bit; i > 0; i--)
*last_byte = ((*last_byte) << 1) + 1;
}
static int
cat_sendinst(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg, __u8 op)
{
__u8 parity, inst, inst_buf[4] = { 0 };
__u8 iseq[VOYAGER_MAX_SCAN_PATH], hseq[VOYAGER_MAX_REG_SIZE];
__u16 ibytes, hbytes, padbits;
int i;
/*
* Parity is the parity of the register number + 1 (READ_REGISTER
* and WRITE_REGISTER always add '1' to the number of bits == 1)
*/
parity = (__u8)(1 + (reg & 0x01) +
((__u8)(reg & 0x02) >> 1) +
((__u8)(reg & 0x04) >> 2) +
((__u8)(reg & 0x08) >> 3)) % 2;
inst = ((parity << 7) | (reg << 2) | op);
outb(VOYAGER_CAT_IRCYC, CAT_CMD);
if(!modp->scan_path_connected) {
if(asicp->asic_id != VOYAGER_CAT_ID) {
printk("**WARNING***: cat_sendinst has disconnected scan path not to CAT asic\n");
return 1;
}
outb(VOYAGER_CAT_HEADER, CAT_DATA);
outb(inst, CAT_DATA);
if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
CDEBUG(("VOYAGER CAT: cat_sendinst failed to get CAT_HEADER\n"));
return 1;
}
return 0;
}
ibytes = modp->inst_bits / BITS_PER_BYTE;
if((padbits = modp->inst_bits % BITS_PER_BYTE) != 0) {
padbits = BITS_PER_BYTE - padbits;
ibytes++;
}
hbytes = modp->largest_reg / BITS_PER_BYTE;
if(modp->largest_reg % BITS_PER_BYTE)
hbytes++;
CDEBUG(("cat_sendinst: ibytes=%d, hbytes=%d\n", ibytes, hbytes));
/* initialise the instruction sequence to 0xff */
for(i=0; i < ibytes + hbytes; i++)
iseq[i] = 0xff;
cat_build_header(hseq, hbytes, modp->smallest_reg, modp->largest_reg);
cat_pack(iseq, modp->inst_bits, hseq, hbytes * BITS_PER_BYTE);
inst_buf[0] = inst;
inst_buf[1] = 0xFF >> (modp->largest_reg % BITS_PER_BYTE);
cat_pack(iseq, asicp->bit_location, inst_buf, asicp->ireg_length);
#ifdef VOYAGER_CAT_DEBUG
printk("ins = 0x%x, iseq: ", inst);
for(i=0; i< ibytes + hbytes; i++)
printk("0x%x ", iseq[i]);
printk("\n");
#endif
if(cat_shiftout(iseq, ibytes, hbytes, padbits)) {
CDEBUG(("VOYAGER CAT: cat_sendinst: cat_shiftout failed\n"));
return 1;
}
CDEBUG(("CAT SHIFTOUT DONE\n"));
return 0;
}
static int
cat_getdata(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
__u8 *value)
{
if(!modp->scan_path_connected) {
if(asicp->asic_id != VOYAGER_CAT_ID) {
CDEBUG(("VOYAGER CAT: ERROR: cat_getdata to CAT asic with scan path connected\n"));
return 1;
}
if(reg > VOYAGER_SUBADDRHI)
outb(VOYAGER_CAT_RUN, CAT_CMD);
outb(VOYAGER_CAT_DRCYC, CAT_CMD);
outb(VOYAGER_CAT_HEADER, CAT_DATA);
*value = inb(CAT_DATA);
outb(0xAA, CAT_DATA);
if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
CDEBUG(("cat_getdata: failed to get VOYAGER_CAT_HEADER\n"));
return 1;
}
return 0;
}
else {
__u16 sbits = modp->num_asics -1 + asicp->ireg_length;
__u16 sbytes = sbits / BITS_PER_BYTE;
__u16 tbytes;
__u8 string[VOYAGER_MAX_SCAN_PATH], trailer[VOYAGER_MAX_REG_SIZE];
__u8 padbits;
int i;
outb(VOYAGER_CAT_DRCYC, CAT_CMD);
if((padbits = sbits % BITS_PER_BYTE) != 0) {
padbits = BITS_PER_BYTE - padbits;
sbytes++;
}
tbytes = asicp->ireg_length / BITS_PER_BYTE;
if(asicp->ireg_length % BITS_PER_BYTE)
tbytes++;
CDEBUG(("cat_getdata: tbytes = %d, sbytes = %d, padbits = %d\n",
tbytes, sbytes, padbits));
cat_build_header(trailer, tbytes, 1, asicp->ireg_length);
for(i = tbytes - 1; i >= 0; i--) {
outb(trailer[i], CAT_DATA);
string[sbytes + i] = inb(CAT_DATA);
}
for(i = sbytes - 1; i >= 0; i--) {
outb(0xaa, CAT_DATA);
string[i] = inb(CAT_DATA);
}
*value = 0;
cat_unpack(string, padbits + (tbytes * BITS_PER_BYTE) + asicp->asic_location, value, asicp->ireg_length);
#ifdef VOYAGER_CAT_DEBUG
printk("value=0x%x, string: ", *value);
for(i=0; i< tbytes+sbytes; i++)
printk("0x%x ", string[i]);
printk("\n");
#endif
/* sanity check the rest of the return */
for(i=0; i < tbytes; i++) {
__u8 input = 0;
cat_unpack(string, padbits + (i * BITS_PER_BYTE), &input, BITS_PER_BYTE);
if(trailer[i] != input) {
CDEBUG(("cat_getdata: failed to sanity check rest of ret(%d) 0x%x != 0x%x\n", i, input, trailer[i]));
return 1;
}
}
CDEBUG(("cat_getdata DONE\n"));
return 0;
}
}
static int
cat_shiftout(__u8 *data, __u16 data_bytes, __u16 header_bytes, __u8 pad_bits)
{
int i;
for(i = data_bytes + header_bytes - 1; i >= header_bytes; i--)
outb(data[i], CAT_DATA);
for(i = header_bytes - 1; i >= 0; i--) {
__u8 header = 0;
__u8 input;
outb(data[i], CAT_DATA);
input = inb(CAT_DATA);
CDEBUG(("cat_shiftout: returned 0x%x\n", input));
cat_unpack(data, ((data_bytes + i) * BITS_PER_BYTE) - pad_bits,
&header, BITS_PER_BYTE);
if(input != header) {
CDEBUG(("VOYAGER CAT: cat_shiftout failed to return header 0x%x != 0x%x\n", input, header));
return 1;
}
}
return 0;
}
static int
cat_senddata(voyager_module_t *modp, voyager_asic_t *asicp,
__u8 reg, __u8 value)
{
outb(VOYAGER_CAT_DRCYC, CAT_CMD);
if(!modp->scan_path_connected) {
if(asicp->asic_id != VOYAGER_CAT_ID) {
CDEBUG(("VOYAGER CAT: ERROR: scan path disconnected when asic != CAT\n"));
return 1;
}
outb(VOYAGER_CAT_HEADER, CAT_DATA);
outb(value, CAT_DATA);
if(inb(CAT_DATA) != VOYAGER_CAT_HEADER) {
CDEBUG(("cat_senddata: failed to get correct header response to sent data\n"));
return 1;
}
if(reg > VOYAGER_SUBADDRHI) {
outb(VOYAGER_CAT_RUN, CAT_CMD);
outb(VOYAGER_CAT_END, CAT_CMD);
outb(VOYAGER_CAT_RUN, CAT_CMD);
}
return 0;
}
else {
__u16 hbytes = asicp->ireg_length / BITS_PER_BYTE;
__u16 dbytes = (modp->num_asics - 1 + asicp->ireg_length)/BITS_PER_BYTE;
__u8 padbits, dseq[VOYAGER_MAX_SCAN_PATH],
hseq[VOYAGER_MAX_REG_SIZE];
int i;
if((padbits = (modp->num_asics - 1
+ asicp->ireg_length) % BITS_PER_BYTE) != 0) {
padbits = BITS_PER_BYTE - padbits;
dbytes++;
}
if(asicp->ireg_length % BITS_PER_BYTE)
hbytes++;
cat_build_header(hseq, hbytes, 1, asicp->ireg_length);
for(i = 0; i < dbytes + hbytes; i++)
dseq[i] = 0xff;
CDEBUG(("cat_senddata: dbytes=%d, hbytes=%d, padbits=%d\n",
dbytes, hbytes, padbits));
cat_pack(dseq, modp->num_asics - 1 + asicp->ireg_length,
hseq, hbytes * BITS_PER_BYTE);
cat_pack(dseq, asicp->asic_location, &value,
asicp->ireg_length);
#ifdef VOYAGER_CAT_DEBUG
printk("dseq ");
for(i=0; i<hbytes+dbytes; i++) {
printk("0x%x ", dseq[i]);
}
printk("\n");
#endif
return cat_shiftout(dseq, dbytes, hbytes, padbits);
}
}
static int
cat_write(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
__u8 value)
{
if(cat_sendinst(modp, asicp, reg, VOYAGER_WRITE_CONFIG))
return 1;
return cat_senddata(modp, asicp, reg, value);
}
static int
cat_read(voyager_module_t *modp, voyager_asic_t *asicp, __u8 reg,
__u8 *value)
{
if(cat_sendinst(modp, asicp, reg, VOYAGER_READ_CONFIG))
return 1;
return cat_getdata(modp, asicp, reg, value);
}
static int
cat_subaddrsetup(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
__u16 len)
{
__u8 val;
if(len > 1) {
/* set auto increment */
__u8 newval;
if(cat_read(modp, asicp, VOYAGER_AUTO_INC_REG, &val)) {
CDEBUG(("cat_subaddrsetup: read of VOYAGER_AUTO_INC_REG failed\n"));
return 1;
}
CDEBUG(("cat_subaddrsetup: VOYAGER_AUTO_INC_REG = 0x%x\n", val));
newval = val | VOYAGER_AUTO_INC;
if(newval != val) {
if(cat_write(modp, asicp, VOYAGER_AUTO_INC_REG, val)) {
CDEBUG(("cat_subaddrsetup: write to VOYAGER_AUTO_INC_REG failed\n"));
return 1;
}
}
}
if(cat_write(modp, asicp, VOYAGER_SUBADDRLO, (__u8)(offset &0xff))) {
CDEBUG(("cat_subaddrsetup: write to SUBADDRLO failed\n"));
return 1;
}
if(asicp->subaddr > VOYAGER_SUBADDR_LO) {
if(cat_write(modp, asicp, VOYAGER_SUBADDRHI, (__u8)(offset >> 8))) {
CDEBUG(("cat_subaddrsetup: write to SUBADDRHI failed\n"));
return 1;
}
cat_read(modp, asicp, VOYAGER_SUBADDRHI, &val);
CDEBUG(("cat_subaddrsetup: offset = %d, hi = %d\n", offset, val));
}
cat_read(modp, asicp, VOYAGER_SUBADDRLO, &val);
CDEBUG(("cat_subaddrsetup: offset = %d, lo = %d\n", offset, val));
return 0;
}
static int
cat_subwrite(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
__u16 len, void *buf)
{
int i, retval;
/* FIXME: need special actions for VOYAGER_CAT_ID here */
if(asicp->asic_id == VOYAGER_CAT_ID) {
CDEBUG(("cat_subwrite: ATTEMPT TO WRITE TO CAT ASIC\n"));
/* FIXME -- This is supposed to be handled better
* There is a problem writing to the cat asic in the
* PSI. The 30us delay seems to work, though */
udelay(30);
}
if((retval = cat_subaddrsetup(modp, asicp, offset, len)) != 0) {
printk("cat_subwrite: cat_subaddrsetup FAILED\n");
return retval;
}
if(cat_sendinst(modp, asicp, VOYAGER_SUBADDRDATA, VOYAGER_WRITE_CONFIG)) {
printk("cat_subwrite: cat_sendinst FAILED\n");
return 1;
}
for(i = 0; i < len; i++) {
if(cat_senddata(modp, asicp, 0xFF, ((__u8 *)buf)[i])) {
printk("cat_subwrite: cat_sendata element at %d FAILED\n", i);
return 1;
}
}
return 0;
}
static int
cat_subread(voyager_module_t *modp, voyager_asic_t *asicp, __u16 offset,
__u16 len, void *buf)
{
int i, retval;
if((retval = cat_subaddrsetup(modp, asicp, offset, len)) != 0) {
CDEBUG(("cat_subread: cat_subaddrsetup FAILED\n"));
return retval;
}
if(cat_sendinst(modp, asicp, VOYAGER_SUBADDRDATA, VOYAGER_READ_CONFIG)) {
CDEBUG(("cat_subread: cat_sendinst failed\n"));
return 1;
}
for(i = 0; i < len; i++) {
if(cat_getdata(modp, asicp, 0xFF,
&((__u8 *)buf)[i])) {
CDEBUG(("cat_subread: cat_getdata element %d failed\n", i));
return 1;
}
}
return 0;
}
/* buffer for storing EPROM data read in during initialisation */
static __initdata __u8 eprom_buf[0xFFFF];
static voyager_module_t *voyager_initial_module;
/* Initialise the cat bus components. We assume this is called by the
* boot cpu *after* all memory initialisation has been done (so we can
* use kmalloc) but before smp initialisation, so we can probe the SMP
* configuration and pick up necessary information. */
void
voyager_cat_init(void)
{
voyager_module_t **modpp = &voyager_initial_module;
voyager_asic_t **asicpp;
voyager_asic_t *qabc_asic = NULL;
int i, j;
unsigned long qic_addr = 0;
__u8 qabc_data[0x20];
__u8 num_submodules, val;
voyager_eprom_hdr_t *eprom_hdr = (voyager_eprom_hdr_t *)&eprom_buf[0];
__u8 cmos[4];
unsigned long addr;
/* initiallise the SUS mailbox */
for(i=0; i<sizeof(cmos); i++)
cmos[i] = voyager_extended_cmos_read(VOYAGER_DUMP_LOCATION + i);
addr = *(unsigned long *)cmos;
if((addr & 0xff000000) != 0xff000000) {
printk(KERN_ERR "Voyager failed to get SUS mailbox (addr = 0x%lx\n", addr);
} else {
static struct resource res;
res.name = "voyager SUS";
res.start = addr;
res.end = addr+0x3ff;
request_resource(&iomem_resource, &res);
voyager_SUS = (struct voyager_SUS *)
ioremap(addr, 0x400);
printk(KERN_NOTICE "Voyager SUS mailbox version 0x%x\n",
voyager_SUS->SUS_version);
voyager_SUS->kernel_version = VOYAGER_MAILBOX_VERSION;
voyager_SUS->kernel_flags = VOYAGER_OS_HAS_SYSINT;
}
/* clear the processor counts */
voyager_extended_vic_processors = 0;
voyager_quad_processors = 0;
printk("VOYAGER: beginning CAT bus probe\n");
/* set up the SuperSet Port Block which tells us where the
* CAT communication port is */
sspb = inb(VOYAGER_SSPB_RELOCATION_PORT) * 0x100;
VDEBUG(("VOYAGER DEBUG: sspb = 0x%x\n", sspb));
/* now find out if were 8 slot or normal */
if((inb(VIC_PROC_WHO_AM_I) & EIGHT_SLOT_IDENTIFIER)
== EIGHT_SLOT_IDENTIFIER) {
voyager_8slot = 1;
printk(KERN_NOTICE "Voyager: Eight slot 51xx configuration detected\n");
}
for(i = VOYAGER_MIN_MODULE;
i <= VOYAGER_MAX_MODULE; i++) {
__u8 input;
int asic;
__u16 eprom_size;
__u16 sp_offset;
outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
outb(i, VOYAGER_CAT_CONFIG_PORT);
/* check the presence of the module */
outb(VOYAGER_CAT_RUN, CAT_CMD);
outb(VOYAGER_CAT_IRCYC, CAT_CMD);
outb(VOYAGER_CAT_HEADER, CAT_DATA);
/* stream series of alternating 1's and 0's to stimulate
* response */
outb(0xAA, CAT_DATA);
input = inb(CAT_DATA);
outb(VOYAGER_CAT_END, CAT_CMD);
if(input != VOYAGER_CAT_HEADER) {
continue;
}
CDEBUG(("VOYAGER DEBUG: found module id 0x%x, %s\n", i,
cat_module_name(i)));
*modpp = kmalloc(sizeof(voyager_module_t), GFP_KERNEL); /*&voyager_module_storage[cat_count++];*/
if(*modpp == NULL) {
printk("**WARNING** kmalloc failure in cat_init\n");
continue;
}
memset(*modpp, 0, sizeof(voyager_module_t));
/* need temporary asic for cat_subread. It will be
* filled in correctly later */
(*modpp)->asic = kmalloc(sizeof(voyager_asic_t), GFP_KERNEL); /*&voyager_asic_storage[asic_count];*/
if((*modpp)->asic == NULL) {
printk("**WARNING** kmalloc failure in cat_init\n");
continue;
}
memset((*modpp)->asic, 0, sizeof(voyager_asic_t));
(*modpp)->asic->asic_id = VOYAGER_CAT_ID;
(*modpp)->asic->subaddr = VOYAGER_SUBADDR_HI;
(*modpp)->module_addr = i;
(*modpp)->scan_path_connected = 0;
if(i == VOYAGER_PSI) {
/* Exception leg for modules with no EEPROM */
printk("Module \"%s\"\n", cat_module_name(i));
continue;
}
CDEBUG(("cat_init: Reading eeprom for module 0x%x at offset %d\n", i, VOYAGER_XSUM_END_OFFSET));
outb(VOYAGER_CAT_RUN, CAT_CMD);
cat_disconnect(*modpp, (*modpp)->asic);
if(cat_subread(*modpp, (*modpp)->asic,
VOYAGER_XSUM_END_OFFSET, sizeof(eprom_size),
&eprom_size)) {
printk("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n", i);
outb(VOYAGER_CAT_END, CAT_CMD);
continue;
}
if(eprom_size > sizeof(eprom_buf)) {
printk("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x. Need %d\n", i, eprom_size);
outb(VOYAGER_CAT_END, CAT_CMD);
continue;
}
outb(VOYAGER_CAT_END, CAT_CMD);
outb(VOYAGER_CAT_RUN, CAT_CMD);
CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i, eprom_size));
if(cat_subread(*modpp, (*modpp)->asic, 0,
eprom_size, eprom_buf)) {
outb(VOYAGER_CAT_END, CAT_CMD);
continue;
}
outb(VOYAGER_CAT_END, CAT_CMD);
printk("Module \"%s\", version 0x%x, tracer 0x%x, asics %d\n",
cat_module_name(i), eprom_hdr->version_id,
*((__u32 *)eprom_hdr->tracer), eprom_hdr->num_asics);
(*modpp)->ee_size = eprom_hdr->ee_size;
(*modpp)->num_asics = eprom_hdr->num_asics;
asicpp = &((*modpp)->asic);
sp_offset = eprom_hdr->scan_path_offset;
/* All we really care about are the Quad cards. We
* identify them because they are in a processor slot
* and have only four asics */
if((i < 0x10 || (i>=0x14 && i < 0x1c) || i>0x1f)) {
modpp = &((*modpp)->next);
continue;
}
/* Now we know it's in a processor slot, does it have
* a quad baseboard submodule */
outb(VOYAGER_CAT_RUN, CAT_CMD);
cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODPRESENT,
&num_submodules);
/* lowest two bits, active low */
num_submodules = ~(0xfc | num_submodules);
CDEBUG(("VOYAGER CAT: %d submodules present\n", num_submodules));
if(num_submodules == 0) {
/* fill in the dyadic extended processors */
__u8 cpu = i & 0x07;
printk("Module \"%s\": Dyadic Processor Card\n",
cat_module_name(i));
voyager_extended_vic_processors |= (1<<cpu);
cpu += 4;
voyager_extended_vic_processors |= (1<<cpu);
outb(VOYAGER_CAT_END, CAT_CMD);
continue;
}
/* now we want to read the asics on the first submodule,
* which should be the quad base board */
cat_read(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, &val);
CDEBUG(("cat_init: SUBMODSELECT value = 0x%x\n", val));
val = (val & 0x7c) | VOYAGER_QUAD_BASEBOARD;
cat_write(*modpp, (*modpp)->asic, VOYAGER_SUBMODSELECT, val);
outb(VOYAGER_CAT_END, CAT_CMD);
CDEBUG(("cat_init: Reading eeprom for module 0x%x at offset %d\n", i, VOYAGER_XSUM_END_OFFSET));
outb(VOYAGER_CAT_RUN, CAT_CMD);
cat_disconnect(*modpp, (*modpp)->asic);
if(cat_subread(*modpp, (*modpp)->asic,
VOYAGER_XSUM_END_OFFSET, sizeof(eprom_size),
&eprom_size)) {
printk("**WARNING**: Voyager couldn't read EPROM size for module 0x%x\n", i);
outb(VOYAGER_CAT_END, CAT_CMD);
continue;
}
if(eprom_size > sizeof(eprom_buf)) {
printk("**WARNING**: Voyager insufficient size to read EPROM data, module 0x%x. Need %d\n", i, eprom_size);
outb(VOYAGER_CAT_END, CAT_CMD);
continue;
}
outb(VOYAGER_CAT_END, CAT_CMD);
outb(VOYAGER_CAT_RUN, CAT_CMD);
CDEBUG(("cat_init: module 0x%x, eeprom_size %d\n", i, eprom_size));
if(cat_subread(*modpp, (*modpp)->asic, 0,
eprom_size, eprom_buf)) {
outb(VOYAGER_CAT_END, CAT_CMD);
continue;
}
outb(VOYAGER_CAT_END, CAT_CMD);
/* Now do everything for the QBB submodule 1 */
(*modpp)->ee_size = eprom_hdr->ee_size;
(*modpp)->num_asics = eprom_hdr->num_asics;
asicpp = &((*modpp)->asic);
sp_offset = eprom_hdr->scan_path_offset;
/* get rid of the dummy CAT asic and read the real one */
kfree((*modpp)->asic);
for(asic=0; asic < (*modpp)->num_asics; asic++) {
int j;
voyager_asic_t *asicp = *asicpp
= kzalloc(sizeof(voyager_asic_t), GFP_KERNEL); /*&voyager_asic_storage[asic_count++];*/
voyager_sp_table_t *sp_table;
voyager_at_t *asic_table;
voyager_jtt_t *jtag_table;
if(asicp == NULL) {
printk("**WARNING** kmalloc failure in cat_init\n");
continue;
}
asicpp = &(asicp->next);
asicp->asic_location = asic;
sp_table = (voyager_sp_table_t *)(eprom_buf + sp_offset);
asicp->asic_id = sp_table->asic_id;
asic_table = (voyager_at_t *)(eprom_buf + sp_table->asic_data_offset);
for(j=0; j<4; j++)
asicp->jtag_id[j] = asic_table->jtag_id[j];
jtag_table = (voyager_jtt_t *)(eprom_buf + asic_table->jtag_offset);
asicp->ireg_length = jtag_table->ireg_len;
asicp->bit_location = (*modpp)->inst_bits;
(*modpp)->inst_bits += asicp->ireg_length;
if(asicp->ireg_length > (*modpp)->largest_reg)
(*modpp)->largest_reg = asicp->ireg_length;
if (asicp->ireg_length < (*modpp)->smallest_reg ||
(*modpp)->smallest_reg == 0)
(*modpp)->smallest_reg = asicp->ireg_length;
CDEBUG(("asic 0x%x, ireg_length=%d, bit_location=%d\n",
asicp->asic_id, asicp->ireg_length,
asicp->bit_location));
if(asicp->asic_id == VOYAGER_QUAD_QABC) {
CDEBUG(("VOYAGER CAT: QABC ASIC found\n"));
qabc_asic = asicp;
}
sp_offset += sizeof(voyager_sp_table_t);
}
CDEBUG(("Module inst_bits = %d, largest_reg = %d, smallest_reg=%d\n",
(*modpp)->inst_bits, (*modpp)->largest_reg,
(*modpp)->smallest_reg));
/* OK, now we have the QUAD ASICs set up, use them.
* we need to:
*
* 1. Find the Memory area for the Quad CPIs.
* 2. Find the Extended VIC processor
* 3. Configure a second extended VIC processor (This
* cannot be done for the 51xx.
* */
outb(VOYAGER_CAT_RUN, CAT_CMD);
cat_connect(*modpp, (*modpp)->asic);
CDEBUG(("CAT CONNECTED!!\n"));
cat_subread(*modpp, qabc_asic, 0, sizeof(qabc_data), qabc_data);
qic_addr = qabc_data[5] << 8;
qic_addr = (qic_addr | qabc_data[6]) << 8;
qic_addr = (qic_addr | qabc_data[7]) << 8;
printk("Module \"%s\": Quad Processor Card; CPI 0x%lx, SET=0x%x\n",
cat_module_name(i), qic_addr, qabc_data[8]);
#if 0 /* plumbing fails---FIXME */
if((qabc_data[8] & 0xf0) == 0) {
/* FIXME: 32 way 8 CPU slot monster cannot be
* plumbed this way---need to check for it */
printk("Plumbing second Extended Quad Processor\n");
/* second VIC line hardwired to Quad CPU 1 */
qabc_data[8] |= 0x20;
cat_subwrite(*modpp, qabc_asic, 8, 1, &qabc_data[8]);
#ifdef VOYAGER_CAT_DEBUG
/* verify plumbing */
cat_subread(*modpp, qabc_asic, 8, 1, &qabc_data[8]);
if((qabc_data[8] & 0xf0) == 0) {
CDEBUG(("PLUMBING FAILED: 0x%x\n", qabc_data[8]));
}
#endif
}
#endif
{
struct resource *res = kzalloc(sizeof(struct resource),GFP_KERNEL);
res->name = kmalloc(128, GFP_KERNEL);
sprintf((char *)res->name, "Voyager %s Quad CPI", cat_module_name(i));
res->start = qic_addr;
res->end = qic_addr + 0x3ff;
request_resource(&iomem_resource, res);
}
qic_addr = (unsigned long)ioremap(qic_addr, 0x400);
for(j = 0; j < 4; j++) {
__u8 cpu;
if(voyager_8slot) {
/* 8 slot has a different mapping,
* each slot has only one vic line, so
* 1 cpu in each slot must be < 8 */
cpu = (i & 0x07) + j*8;
} else {
cpu = (i & 0x03) + j*4;
}
if( (qabc_data[8] & (1<<j))) {
voyager_extended_vic_processors |= (1<<cpu);
}
if(qabc_data[8] & (1<<(j+4)) ) {
/* Second SET register plumbed: Quad
* card has two VIC connected CPUs.
* Secondary cannot be booted as a VIC
* CPU */
voyager_extended_vic_processors |= (1<<cpu);
voyager_allowed_boot_processors &= (~(1<<cpu));
}
voyager_quad_processors |= (1<<cpu);
voyager_quad_cpi_addr[cpu] = (struct voyager_qic_cpi *)
(qic_addr+(j<<8));
CDEBUG(("CPU%d: CPI address 0x%lx\n", cpu,
(unsigned long)voyager_quad_cpi_addr[cpu]));
}
outb(VOYAGER_CAT_END, CAT_CMD);
*asicpp = NULL;
modpp = &((*modpp)->next);
}
*modpp = NULL;
printk("CAT Bus Initialisation finished: extended procs 0x%x, quad procs 0x%x, allowed vic boot = 0x%x\n", voyager_extended_vic_processors, voyager_quad_processors, voyager_allowed_boot_processors);
request_resource(&ioport_resource, &vic_res);
if(voyager_quad_processors)
request_resource(&ioport_resource, &qic_res);
/* set up the front power switch */
}
int
voyager_cat_readb(__u8 module, __u8 asic, int reg)
{
return 0;
}
static int
cat_disconnect(voyager_module_t *modp, voyager_asic_t *asicp)
{
__u8 val;
int err = 0;
if(!modp->scan_path_connected)
return 0;
if(asicp->asic_id != VOYAGER_CAT_ID) {
CDEBUG(("cat_disconnect: ASIC is not CAT\n"));
return 1;
}
err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val);
if(err) {
CDEBUG(("cat_disconnect: failed to read SCANPATH\n"));
return err;
}
val &= VOYAGER_DISCONNECT_ASIC;
err = cat_write(modp, asicp, VOYAGER_SCANPATH, val);
if(err) {
CDEBUG(("cat_disconnect: failed to write SCANPATH\n"));
return err;
}
outb(VOYAGER_CAT_END, CAT_CMD);
outb(VOYAGER_CAT_RUN, CAT_CMD);
modp->scan_path_connected = 0;
return 0;
}
static int
cat_connect(voyager_module_t *modp, voyager_asic_t *asicp)
{
__u8 val;
int err = 0;
if(modp->scan_path_connected)
return 0;
if(asicp->asic_id != VOYAGER_CAT_ID) {
CDEBUG(("cat_connect: ASIC is not CAT\n"));
return 1;
}
err = cat_read(modp, asicp, VOYAGER_SCANPATH, &val);
if(err) {
CDEBUG(("cat_connect: failed to read SCANPATH\n"));
return err;
}
val |= VOYAGER_CONNECT_ASIC;
err = cat_write(modp, asicp, VOYAGER_SCANPATH, val);
if(err) {
CDEBUG(("cat_connect: failed to write SCANPATH\n"));
return err;
}
outb(VOYAGER_CAT_END, CAT_CMD);
outb(VOYAGER_CAT_RUN, CAT_CMD);
modp->scan_path_connected = 1;
return 0;
}
void
voyager_cat_power_off(void)
{
/* Power the machine off by writing to the PSI over the CAT
* bus */
__u8 data;
voyager_module_t psi = { 0 };
voyager_asic_t psi_asic = { 0 };
psi.asic = &psi_asic;
psi.asic->asic_id = VOYAGER_CAT_ID;
psi.asic->subaddr = VOYAGER_SUBADDR_HI;
psi.module_addr = VOYAGER_PSI;
psi.scan_path_connected = 0;
outb(VOYAGER_CAT_END, CAT_CMD);
/* Connect the PSI to the CAT Bus */
outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
outb(VOYAGER_CAT_RUN, CAT_CMD);
cat_disconnect(&psi, &psi_asic);
/* Read the status */
cat_subread(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
outb(VOYAGER_CAT_END, CAT_CMD);
CDEBUG(("PSI STATUS 0x%x\n", data));
/* These two writes are power off prep and perform */
data = PSI_CLEAR;
outb(VOYAGER_CAT_RUN, CAT_CMD);
cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
outb(VOYAGER_CAT_END, CAT_CMD);
data = PSI_POWER_DOWN;
outb(VOYAGER_CAT_RUN, CAT_CMD);
cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG, 1, &data);
outb(VOYAGER_CAT_END, CAT_CMD);
}
struct voyager_status voyager_status = { 0 };
void
voyager_cat_psi(__u8 cmd, __u16 reg, __u8 *data)
{
voyager_module_t psi = { 0 };
voyager_asic_t psi_asic = { 0 };
psi.asic = &psi_asic;
psi.asic->asic_id = VOYAGER_CAT_ID;
psi.asic->subaddr = VOYAGER_SUBADDR_HI;
psi.module_addr = VOYAGER_PSI;
psi.scan_path_connected = 0;
outb(VOYAGER_CAT_END, CAT_CMD);
/* Connect the PSI to the CAT Bus */
outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
outb(VOYAGER_CAT_RUN, CAT_CMD);
cat_disconnect(&psi, &psi_asic);
switch(cmd) {
case VOYAGER_PSI_READ:
cat_read(&psi, &psi_asic, reg, data);
break;
case VOYAGER_PSI_WRITE:
cat_write(&psi, &psi_asic, reg, *data);
break;
case VOYAGER_PSI_SUBREAD:
cat_subread(&psi, &psi_asic, reg, 1, data);
break;
case VOYAGER_PSI_SUBWRITE:
cat_subwrite(&psi, &psi_asic, reg, 1, data);
break;
default:
printk(KERN_ERR "Voyager PSI, unrecognised command %d\n", cmd);
break;
}
outb(VOYAGER_CAT_END, CAT_CMD);
}
void
voyager_cat_do_common_interrupt(void)
{
/* This is caused either by a memory parity error or something
* in the PSI */
__u8 data;
voyager_module_t psi = { 0 };
voyager_asic_t psi_asic = { 0 };
struct voyager_psi psi_reg;
int i;
re_read:
psi.asic = &psi_asic;
psi.asic->asic_id = VOYAGER_CAT_ID;
psi.asic->subaddr = VOYAGER_SUBADDR_HI;
psi.module_addr = VOYAGER_PSI;
psi.scan_path_connected = 0;
outb(VOYAGER_CAT_END, CAT_CMD);
/* Connect the PSI to the CAT Bus */
outb(VOYAGER_CAT_DESELECT, VOYAGER_CAT_CONFIG_PORT);
outb(VOYAGER_PSI, VOYAGER_CAT_CONFIG_PORT);
outb(VOYAGER_CAT_RUN, CAT_CMD);
cat_disconnect(&psi, &psi_asic);
/* Read the status. NOTE: Need to read *all* the PSI regs here
* otherwise the cmn int will be reasserted */
for(i = 0; i < sizeof(psi_reg.regs); i++) {
cat_read(&psi, &psi_asic, i, &((__u8 *)&psi_reg.regs)[i]);
}
outb(VOYAGER_CAT_END, CAT_CMD);
if((psi_reg.regs.checkbit & 0x02) == 0) {
psi_reg.regs.checkbit |= 0x02;
cat_write(&psi, &psi_asic, 5, psi_reg.regs.checkbit);
printk("VOYAGER RE-READ PSI\n");
goto re_read;
}
outb(VOYAGER_CAT_RUN, CAT_CMD);
for(i = 0; i < sizeof(psi_reg.subregs); i++) {
/* This looks strange, but the PSI doesn't do auto increment
* correctly */
cat_subread(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG + i,
1, &((__u8 *)&psi_reg.subregs)[i]);
}
outb(VOYAGER_CAT_END, CAT_CMD);
#ifdef VOYAGER_CAT_DEBUG
printk("VOYAGER PSI: ");
for(i=0; i<sizeof(psi_reg.regs); i++)
printk("%02x ", ((__u8 *)&psi_reg.regs)[i]);
printk("\n ");
for(i=0; i<sizeof(psi_reg.subregs); i++)
printk("%02x ", ((__u8 *)&psi_reg.subregs)[i]);
printk("\n");
#endif
if(psi_reg.regs.intstatus & PSI_MON) {
/* switch off or power fail */
if(psi_reg.subregs.supply & PSI_SWITCH_OFF) {
if(voyager_status.switch_off) {
printk(KERN_ERR "Voyager front panel switch turned off again---Immediate power off!\n");
voyager_cat_power_off();
/* not reached */
} else {
printk(KERN_ERR "Voyager front panel switch turned off\n");
voyager_status.switch_off = 1;
voyager_status.request_from_kernel = 1;
wake_up_process(voyager_thread);
}
/* Tell the hardware we're taking care of the
* shutdown, otherwise it will power the box off
* within 3 seconds of the switch being pressed and,
* which is much more important to us, continue to
* assert the common interrupt */
data = PSI_CLR_SWITCH_OFF;
outb(VOYAGER_CAT_RUN, CAT_CMD);
cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_SUPPLY_REG,
1, &data);
outb(VOYAGER_CAT_END, CAT_CMD);
} else {
VDEBUG(("Voyager ac fail reg 0x%x\n",
psi_reg.subregs.ACfail));
if((psi_reg.subregs.ACfail & AC_FAIL_STAT_CHANGE) == 0) {
/* No further update */
return;
}
#if 0
/* Don't bother trying to find out who failed.
* FIXME: This probably makes the code incorrect on
* anything other than a 345x */
for(i=0; i< 5; i++) {
if( psi_reg.subregs.ACfail &(1<<i)) {
break;
}
}
printk(KERN_NOTICE "AC FAIL IN SUPPLY %d\n", i);
#endif
/* DON'T do this: it shuts down the AC PSI
outb(VOYAGER_CAT_RUN, CAT_CMD);
data = PSI_MASK_MASK | i;
cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_MASK,
1, &data);
outb(VOYAGER_CAT_END, CAT_CMD);
*/
printk(KERN_ERR "Voyager AC power failure\n");
outb(VOYAGER_CAT_RUN, CAT_CMD);
data = PSI_COLD_START;
cat_subwrite(&psi, &psi_asic, VOYAGER_PSI_GENERAL_REG,
1, &data);
outb(VOYAGER_CAT_END, CAT_CMD);
voyager_status.power_fail = 1;
voyager_status.request_from_kernel = 1;
wake_up_process(voyager_thread);
}
} else if(psi_reg.regs.intstatus & PSI_FAULT) {
/* Major fault! */
printk(KERN_ERR "Voyager PSI Detected major fault, immediate power off!\n");
voyager_cat_power_off();
/* not reached */
} else if(psi_reg.regs.intstatus & (PSI_DC_FAIL | PSI_ALARM
| PSI_CURRENT | PSI_DVM
| PSI_PSCFAULT | PSI_STAT_CHG)) {
/* other psi fault */
printk(KERN_WARNING "Voyager PSI status 0x%x\n", data);
/* clear the PSI fault */
outb(VOYAGER_CAT_RUN, CAT_CMD);
cat_write(&psi, &psi_asic, VOYAGER_PSI_STATUS_REG, 0);
outb(VOYAGER_CAT_END, CAT_CMD);
}
}
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