pas16.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:15k
- #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 disabledn");
- /* 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)
- {
- 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,irqn");
- 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 disabledn", 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");