#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 #include #include #include #include #include #include #include "scsi.h" #include "hosts.h" #include "pas16.h" #define AUTOPROBE_IRQ #include "NCR5380.h" #include "constants.h" #include "sd.h" #include #include 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");