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#define AUTOSENSE
#define PSEUDO_DMA
#define BOARD_REQUIRES_NO_UDELAY /* PAS16 needs no I/O recovery delays */
#define UNSAFE /* Not unsafe for PAS16 -- use it */
/*
* This driver adapted from Drew Eckhardt's Trantor T128 driver
*
* Copyright 1993, Drew Eckhardt
* Visionary Computing
* (Unix and Linux consulting and custom programming)
* drew@colorado.edu
* +1 (303) 666-5836
*
* ( Based on T128 - DISTRIBUTION RELEASE 3. )
*
* Modified to work with the Pro Audio Spectrum/Studio 16
* by John Weidman.
*
*
* For more information, please consult
*
* Media Vision
* (510) 770-8600
* (800) 348-7116
*
* and
*
* NCR 5380 Family
* SCSI Protocol Controller
* Databook
*
* NCR Microelectronics
* 1635 Aeroplaza Drive
* Colorado Springs, CO 80916
* 1+ (719) 578-3400
* 1+ (800) 334-5454
*/
/*
* Options :
* AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
* for commands that return with a CHECK CONDITION status.
*
* LIMIT_TRANSFERSIZE - if defined, limit the pseudo-dma transfers to 512
* bytes at a time. Since interrupts are disabled by default during
* these transfers, we might need this to give reasonable interrupt
* service time if the transfer size gets too large.
*
* PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance
* increase compared to polled I/O.
*
* PARITY - enable parity checking. Not supported.
*
* UNSAFE - leave interrupts enabled during pseudo-DMA transfers. This
* parameter comes from the NCR5380 code. It is NOT unsafe with
* the PAS16 and you should use it. If you don't you will have
* a problem with dropped characters during high speed
* communications during SCSI transfers. If you really don't
* want to use UNSAFE you can try defining LIMIT_TRANSFERSIZE or
* twiddle with the transfer size in the high level code.
*
* The card is detected and initialized in one of several ways :
* 1. Autoprobe (default) - There are many different models of
* the Pro Audio Spectrum/Studio 16, and I only have one of
* them, so this may require a little tweaking. An interrupt
* is triggered to autoprobe for the interrupt line. Note:
* with the newer model boards, the interrupt is set via
* software after reset using the default_irq for the
* current board number.
*
* 2. With command line overrides - pas16=port,irq may be
* used on the LILO command line to override the defaults.
*
* 3. With the PAS16_OVERRIDE compile time define. This is
* specified as an array of address, irq tuples. Ie, for
* one board at the default 0x388 address, IRQ10, I could say
* -DPAS16_OVERRIDE={{0x388, 10}}
* NOTE: Untested.
*
* 4. When included as a module, with arguments passed on the command line:
* pas16_irq=xx the interrupt
* pas16_addr=xx the port
* e.g. "modprobe pas16 pas16_addr=0x388 pas16_irq=5"
*
* Note that if the override methods are used, place holders must
* be specified for other boards in the system.
*
*
* Configuration notes :
* The current driver does not support interrupt sharing with the
* sound portion of the card. If you use the same irq for the
* scsi port and sound you will have problems. Either use
* a different irq for the scsi port or don't use interrupts
* for the scsi port.
*
* If you have problems with your card not being recognized, use
* the LILO command line override. Try to get it recognized without
* interrupts. Ie, for a board at the default 0x388 base port,
* boot: linux pas16=0x388,255
*
* IRQ_NONE (255) should be specified for no interrupt,
* IRQ_AUTO (254) to autoprobe for an IRQ line if overridden
* on the command line.
*
* (IRQ_AUTO == 254, IRQ_NONE == 255 in NCR5380.h)
*/
#include <linux/module.h>
#include <asm/system.h>
#include <linux/signal.h>
#include <linux/proc_fs.h>
#include <linux/sched.h>
#include <asm/io.h>
#include <linux/blk.h>
#include "scsi.h"
#include "hosts.h"
#include "pas16.h"
#define AUTOPROBE_IRQ
#include "NCR5380.h"
#include "constants.h"
#include "sd.h"
#include <linux/stat.h>
#include <linux/init.h>
static int pas_maxi = 0;
static int pas_wmaxi = 0;
static unsigned short pas16_addr = 0;
static int pas16_irq = 0;
static int scsi_irq_translate[] = { 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
/* The default_irqs array contains values used to set the irq into the
* board via software (as must be done on newer model boards without
* irq jumpers on the board). The first value in the array will be
* assigned to logical board 0, the next to board 1, etc.
*/
static int default_irqs[] __initdata = {
PAS16_DEFAULT_BOARD_1_IRQ,
PAS16_DEFAULT_BOARD_2_IRQ,
PAS16_DEFAULT_BOARD_3_IRQ,
PAS16_DEFAULT_BOARD_4_IRQ
};
static struct override {
unsigned short io_port;
int irq;
} overrides
#ifdef PAS16_OVERRIDE
[] __initdata = PAS16_OVERRIDE;
#else
[4] __initdata = {
{0, IRQ_AUTO},
{0, IRQ_AUTO},
{0, IRQ_AUTO},
{0, IRQ_AUTO}
};
#endif
#define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
static struct base {
unsigned short io_port;
int noauto;
} bases[] __initdata = {
{PAS16_DEFAULT_BASE_1, 0},
{PAS16_DEFAULT_BASE_2, 0},
{PAS16_DEFAULT_BASE_3, 0},
{PAS16_DEFAULT_BASE_4, 0}
};
#define NO_BASES (sizeof (bases) / sizeof (struct base))
unsigned short pas16_offset[8] = {
0x1c00, /* OUTPUT_DATA_REG */
0x1c01, /* INITIATOR_COMMAND_REG */
0x1c02, /* MODE_REG */
0x1c03, /* TARGET_COMMAND_REG */
0x3c00, /* STATUS_REG ro, SELECT_ENABLE_REG wo */
0x3c01, /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
0x3c02, /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
* START_DMA_TARGET_RECEIVE_REG wo
*/
0x3c03, /* RESET_PARITY_INTERRUPT_REG ro,
* START_DMA_INITIATOR_RECEIVE_REG wo
*/
};
/*----------------------------------------------------------------*/
/**
* enable_board - enable a pas16 board
* @board_num: logical board id
* @port: port to assign it
*
* Sets the address on new model PAS16 hardware
*/
static void __init enable_board(int board_num, unsigned short port)
{
outb(0xbc + board_num, MASTER_ADDRESS_PTR);
outb(port >> 2, MASTER_ADDRESS_PTR);
}
/**
* init_board - set up board
* @port: board address
* @irq: interrupt line
* @force_irq: if true allow scsi/audio on the same int
*
* Set the board up to handle the SCSI interface
*/
static void __init init_board(unsigned short io_port, int irq, int force_irq)
{
unsigned int tmp;
unsigned int pas_irq_code;
/* Initialize the SCSI part of the board */
outb(0x30, io_port + P_TIMEOUT_COUNTER_REG); /* Timeout counter */
outb(0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET); /* Reset TC */
outb(0x01, io_port + WAIT_STATE); /* 1 Wait state */
NCR5380_read(RESET_PARITY_INTERRUPT_REG);
/*
* Set the SCSI interrupt pointer without mucking up the sound
* interrupt pointer in the same byte.
*/
pas_irq_code = (irq < 16) ? scsi_irq_translate[irq] : 0;
tmp = inb(io_port + IO_CONFIG_3);
if (((tmp & 0x0f) == pas_irq_code) && pas_irq_code > 0 && !force_irq) {
printk(KERN_WARNING "pas16: WARNING: Can't use same irq as sound " "driver -- interrupts disabled\n");
/* Set up the drive parameters, disable 5380 interrupts */
outb(0x4d, io_port + SYS_CONFIG_4);
} else {
tmp = (tmp & 0x0f) | (pas_irq_code << 4);
outb(tmp, io_port + IO_CONFIG_3);
/* Set up the drive parameters and enable 5380 interrupts */
outb(0x6d, io_port + SYS_CONFIG_4);
}
}
/**
* pas16_hw_detect - probe for hardware
* @board_num: logical board ID to probe for
*
* Determine if a pas16 board is present
*/
static int __init pas16_hw_detect(unsigned short board_num)
{
unsigned char board_rev, tmp;
unsigned short io_port = bases[board_num].io_port;
/* See if we can find a PAS16 board at the address associated
* with this logical board number.
*/
/* First, attempt to take a newer model board out of reset and
* give it a base address. This shouldn't affect older boards.
*/
enable_board(board_num, io_port);
/* Now see if it looks like a PAS16 board */
board_rev = inb(io_port + PCB_CONFIG);
if (board_rev == 0xff)
return 0;
tmp = board_rev ^ 0xe0;
outb(tmp, io_port + PCB_CONFIG);
tmp = inb(io_port + PCB_CONFIG);
outb(board_rev, io_port + PCB_CONFIG);
if (board_rev != tmp) /* Not a PAS-16 */
return 0;
if ((inb(io_port + OPERATION_MODE_1) & 0x03) != 0x03)
return 0; /* return if no SCSI interface found */
/* Mediavision has some new model boards that return ID bits
* that indicate a SCSI interface, but they're not (LMS). We'll
* put in an additional test to try to weed them out.
*/
outb(0x01, io_port + WAIT_STATE); /* 1 Wait state */
NCR5380_write(MODE_REG, 0x20); /* Is it really SCSI? */
if (NCR5380_read(MODE_REG) != 0x20) /* Write to a reg. */
return 0; /* and try to read */
NCR5380_write(MODE_REG, 0x00); /* it back. */
if (NCR5380_read(MODE_REG) != 0x00)
return 0;
return 1;
}
/**
* pas16_setup - parse command line
* @str: command line block
*
* LILO command line initialization of the overrides array from
* the passed in pas16= options
*/
int __init pas16_setup(char *str, int *ints)
{
static int commandline_current = 0;
int i;
int ints[10];
get_options(str, sizeof(ints) / sizeof(int), ints);
if (ints[0] != 2)
printk(KERN_ERR "pas16_setup : usage pas16=io_port,irq\n");
else if (commandline_current < NO_OVERRIDES) {
overrides[commandline_current].io_port = (unsigned short) ints[1];
overrides[commandline_current].irq = ints[2];
for (i = 0; i < NO_BASES; ++i)
if (bases[i].io_port == (unsigned short) ints[1]) {
bases[i].noauto = 1;
break;
}
++commandline_current;
}
return 1;
}
__setup("pas16=", pas16_setup);
/**
* pas16_detect - detect and configure a pas16
* @tpnt: template
*
* Detects and initializes PAS16 controllers that were autoprobed,
* overridden on the LILO command line, or specified at compile time.
*/
int __init pas16_detect(Scsi_Host_Template * tpnt)
{
static int current_override = 0;
static unsigned short current_base = 0;
struct Scsi_Host *instance;
unsigned short io_port;
int count;
tpnt->proc_name = "pas16";
tpnt->proc_info = &pas16_proc_info;
if (pas16_addr != 0) {
overrides[0].io_port = pas16_addr;
/*
* This is how we avoid seeing more than
* one host adapter at the same I/O port.
* Cribbed shamelessly from pas16_setup().
*/
for (count = 0; count < NO_BASES; ++count)
if (bases[count].io_port == pas16_addr) {
bases[count].noauto = 1;
break;
}
}
if (pas16_irq != 0)
overrides[0].irq = pas16_irq;
for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
io_port = 0;
if (overrides[current_override].io_port) {
io_port = overrides[current_override].io_port;
enable_board(current_override, io_port);
init_board(io_port, overrides[current_override].irq, 1);
}
else
{
for (; !io_port && (current_base < NO_BASES); ++current_base) {
if (!bases[current_base].noauto && pas16_hw_detect(current_base)) {
io_port = bases[current_base].io_port;
init_board(io_port, default_irqs[current_base], 0);
}
}
}
if (!io_port)
break;
instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
if (instance == NULL)
break;
instance->io_port = io_port;
NCR5380_init(instance, 0);
if (overrides[current_override].irq != IRQ_AUTO)
instance->irq = overrides[current_override].irq;
else
instance->irq = NCR5380_probe_irq(instance, PAS16_IRQS);
if (instance->irq != IRQ_NONE)
if (request_irq(instance->irq, do_pas16_intr, SA_INTERRUPT, "pas16", NULL)) {
printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
instance->irq = IRQ_NONE;
}
if (instance->irq == IRQ_NONE) {
printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
/* Disable 5380 interrupts, leave drive params the same */
outb(0x4d, io_port + SYS_CONFIG_4);
outb((inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3);
}
printk(KERN_INFO "scsi%d : at 0x%04x", instance->host_no, (int)
instance->io_port);
if (instance->irq == IRQ_NONE)
printk(" interrupts disabled");
else
printk(" irq %d", instance->irq);
printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", CAN_QUEUE, CMD_PER_LUN, PAS16_PUBLIC_RELEASE);
NCR5380_print_options(instance);
printk("\n");
++current_override;
++count;
}
return count;
}
/**
* pas16_biosparam - generate C/H/S data
* @disk: Disk to set up
* @dev: device ident of disk
* @ip: array to return C/H/S mapping
*
* Generates a BIOS / DOS compatible H-C-S mapping for
* the specified device / size.
*/
int pas16_biosparam(Disk * disk, kdev_t dev, int *ip)
{
int size = disk->capacity;
ip[0] = 64;
ip[1] = 32;
ip[2] = size >> 11; /* I think I have it as /(32*64) */
if (ip[2] > 1024) { /* yes, >, not >= */
ip[0] = 255;
ip[1] = 63;
ip[2] = size / (63 * 255);
if (ip[2] > 1023) /* yes >1023... */
ip[2] = 1023;
}
return 0;
}
/**
* NCR5380_pread - pseudo DMA read
* @instance: board to read from
* @dst: destination for data
* @len: expected/max block length
*
* Fast 5380 pseudo-dma read function, transfers len bytes to
* dst. Unlike most boards the PAS has IRQs enabled here, which
* helps no end.
*/
static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len)
{
unsigned char *d = dst;
unsigned short reg = (unsigned short) (instance->io_port + P_DATA_REG_OFFSET);
int i = len;
int ii = 0;
while (!(inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY))
++ii;
insb(reg, d, i);
if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
outb(P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
printk(KERN_ERR "scsi%d : watchdog timer fired in NCR5380_pread()\n", instance->host_no);
return -1;
}
if (ii > pas_maxi)
pas_maxi = ii;
return 0;
}
/**
* NCR5380_pwrite - pseudo DMA write
* @instance: board to write to
* @src: source for data
* @len: expected/max block length
*
* Fast 5380 pseudo-dma write function, transfers len bytes from
* src. Unlike most boards the PAS has IRQs enabled here, which
* helps no end.
*/
static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len)
{
unsigned char *s = src;
unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
int i = len;
int ii = 0;
while (!((inb(instance->io_port + P_STATUS_REG_OFFSET)) & P_ST_RDY))
++ii;
outsb(reg, s, i);
if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
outb(P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
printk(KERN_ERR "scsi%d : watchdog timer fired in NCR5380_pwrite()\n", instance->host_no);
return -1;
}
if (ii > pas_maxi)
pas_wmaxi = ii;
return 0;
}
#include "NCR5380.c"
/* Eventually this will go into an include file, but this will be later */
static Scsi_Host_Template driver_template = MV_PAS16;
#include "scsi_module.c"
#ifdef MODULE
MODULE_PARM(pas16_addr, "h");
MODULE_PARM(pas16_irq, "i");
#endif
MODULE_LICENSE("GPL");
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