| #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 |
| * |
| * SCSI_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, SCSI_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) |
| { |
| 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 != SCSI_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 = SCSI_IRQ_NONE; |
| } |
| |
| if (instance->irq == SCSI_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 == SCSI_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"); |