/* * Generic Generic NCR5380 driver * * Copyright 1993, Drew Eckhardt * Visionary Computing * (Unix and Linux consulting and custom programming) * drew@colorado.edu * +1 (303) 440-4894 * * NCR53C400 extensions (c) 1994,1995,1996, Kevin Lentin * K.Lentin@cs.monash.edu.au * * NCR53C400A extensions (c) 1996, Ingmar Baumgart * ingmar@gonzo.schwaben.de * * DTC3181E extensions (c) 1997, Ronald van Cuijlenborg * ronald.van.cuijlenborg@tip.nl or nutty@dds.nl * * Added ISAPNP support for DTC436 adapters, * Thomas Sailer, sailer@ife.ee.ethz.ch * * See Documentation/scsi/g_NCR5380.txt for more info. */ #include #include #include #include #include "g_NCR5380.h" #include "NCR5380.h" #include #include #include #include #include #define MAX_CARDS 8 /* old-style parameters for compatibility */ static int ncr_irq; static int ncr_addr; static int ncr_5380; static int ncr_53c400; static int ncr_53c400a; static int dtc_3181e; static int hp_c2502; module_param(ncr_irq, int, 0); module_param(ncr_addr, int, 0); module_param(ncr_5380, int, 0); module_param(ncr_53c400, int, 0); module_param(ncr_53c400a, int, 0); module_param(dtc_3181e, int, 0); module_param(hp_c2502, int, 0); static int irq[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; module_param_array(irq, int, NULL, 0); MODULE_PARM_DESC(irq, "IRQ number(s)"); static int base[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; module_param_array(base, int, NULL, 0); MODULE_PARM_DESC(base, "base address(es)"); static int card[] = { -1, -1, -1, -1, -1, -1, -1, -1 }; module_param_array(card, int, NULL, 0); MODULE_PARM_DESC(card, "card type (0=NCR5380, 1=NCR53C400, 2=NCR53C400A, 3=DTC3181E, 4=HP C2502)"); MODULE_LICENSE("GPL"); #ifndef SCSI_G_NCR5380_MEM /* * Configure I/O address of 53C400A or DTC436 by writing magic numbers * to ports 0x779 and 0x379. */ static void magic_configure(int idx, u8 irq, u8 magic[]) { u8 cfg = 0; outb(magic[0], 0x779); outb(magic[1], 0x379); outb(magic[2], 0x379); outb(magic[3], 0x379); outb(magic[4], 0x379); /* allowed IRQs for HP C2502 */ if (irq != 2 && irq != 3 && irq != 4 && irq != 5 && irq != 7) irq = 0; if (idx >= 0 && idx <= 7) cfg = 0x80 | idx | (irq << 4); outb(cfg, 0x379); } #endif static int generic_NCR5380_init_one(struct scsi_host_template *tpnt, struct device *pdev, int base, int irq, int board) { unsigned int *ports; u8 *magic = NULL; #ifndef SCSI_G_NCR5380_MEM int i; int port_idx = -1; unsigned long region_size; #endif static unsigned int ncr_53c400a_ports[] = { 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0 }; static unsigned int dtc_3181e_ports[] = { 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0 }; static u8 ncr_53c400a_magic[] = { /* 53C400A & DTC436 */ 0x59, 0xb9, 0xc5, 0xae, 0xa6 }; static u8 hp_c2502_magic[] = { /* HP C2502 */ 0x0f, 0x22, 0xf0, 0x20, 0x80 }; int flags, ret; struct Scsi_Host *instance; struct NCR5380_hostdata *hostdata; #ifdef SCSI_G_NCR5380_MEM void __iomem *iomem; resource_size_t iomem_size; #endif ports = NULL; flags = 0; switch (board) { case BOARD_NCR5380: flags = FLAG_NO_PSEUDO_DMA | FLAG_DMA_FIXUP; break; case BOARD_NCR53C400A: ports = ncr_53c400a_ports; magic = ncr_53c400a_magic; break; case BOARD_HP_C2502: ports = ncr_53c400a_ports; magic = hp_c2502_magic; break; case BOARD_DTC3181E: ports = dtc_3181e_ports; magic = ncr_53c400a_magic; break; } #ifndef SCSI_G_NCR5380_MEM if (ports && magic) { /* wakeup sequence for the NCR53C400A and DTC3181E */ /* Disable the adapter and look for a free io port */ magic_configure(-1, 0, magic); region_size = 16; if (base) for (i = 0; ports[i]; i++) { if (base == ports[i]) { /* index found */ if (!request_region(ports[i], region_size, "ncr53c80")) return -EBUSY; break; } } else for (i = 0; ports[i]; i++) { if (!request_region(ports[i], region_size, "ncr53c80")) continue; if (inb(ports[i]) == 0xff) break; release_region(ports[i], region_size); } if (ports[i]) { /* At this point we have our region reserved */ magic_configure(i, 0, magic); /* no IRQ yet */ outb(0xc0, ports[i] + 9); if (inb(ports[i] + 9) != 0x80) { ret = -ENODEV; goto out_release; } base = ports[i]; port_idx = i; } else return -EINVAL; } else { /* NCR5380 - no configuration, just grab */ region_size = 8; if (!base || !request_region(base, region_size, "ncr5380")) return -EBUSY; } #else iomem_size = NCR53C400_region_size; if (!request_mem_region(base, iomem_size, "ncr5380")) return -EBUSY; iomem = ioremap(base, iomem_size); if (!iomem) { release_mem_region(base, iomem_size); return -ENOMEM; } #endif instance = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata)); if (instance == NULL) { ret = -ENOMEM; goto out_release; } hostdata = shost_priv(instance); #ifndef SCSI_G_NCR5380_MEM instance->io_port = base; instance->n_io_port = region_size; hostdata->io_width = 1; /* 8-bit PDMA by default */ /* * On NCR53C400 boards, NCR5380 registers are mapped 8 past * the base address. */ switch (board) { case BOARD_NCR53C400: instance->io_port += 8; hostdata->c400_ctl_status = 0; hostdata->c400_blk_cnt = 1; hostdata->c400_host_buf = 4; break; case BOARD_DTC3181E: hostdata->io_width = 2; /* 16-bit PDMA */ /* fall through */ case BOARD_NCR53C400A: case BOARD_HP_C2502: hostdata->c400_ctl_status = 9; hostdata->c400_blk_cnt = 10; hostdata->c400_host_buf = 8; break; } #else instance->base = base; hostdata->iomem = iomem; hostdata->iomem_size = iomem_size; switch (board) { case BOARD_NCR53C400: hostdata->c400_ctl_status = 0x100; hostdata->c400_blk_cnt = 0x101; hostdata->c400_host_buf = 0x104; break; case BOARD_DTC3181E: case BOARD_NCR53C400A: case BOARD_HP_C2502: pr_err(DRV_MODULE_NAME ": unknown register offsets\n"); ret = -EINVAL; goto out_unregister; } #endif ret = NCR5380_init(instance, flags | FLAG_LATE_DMA_SETUP); if (ret) goto out_unregister; switch (board) { case BOARD_NCR53C400: case BOARD_DTC3181E: case BOARD_NCR53C400A: case BOARD_HP_C2502: NCR5380_write(hostdata->c400_ctl_status, CSR_BASE); } NCR5380_maybe_reset_bus(instance); if (irq != IRQ_AUTO) instance->irq = irq; else instance->irq = NCR5380_probe_irq(instance, 0xffff); /* Compatibility with documented NCR5380 kernel parameters */ if (instance->irq == 255) instance->irq = NO_IRQ; if (instance->irq != NO_IRQ) { #ifndef SCSI_G_NCR5380_MEM /* set IRQ for HP C2502 */ if (board == BOARD_HP_C2502) magic_configure(port_idx, instance->irq, magic); #endif if (request_irq(instance->irq, generic_NCR5380_intr, 0, "NCR5380", instance)) { printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq); instance->irq = NO_IRQ; } } if (instance->irq == NO_IRQ) { 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); } ret = scsi_add_host(instance, pdev); if (ret) goto out_free_irq; scsi_scan_host(instance); dev_set_drvdata(pdev, instance); return 0; out_free_irq: if (instance->irq != NO_IRQ) free_irq(instance->irq, instance); NCR5380_exit(instance); out_unregister: scsi_host_put(instance); out_release: #ifndef SCSI_G_NCR5380_MEM release_region(base, region_size); #else iounmap(iomem); release_mem_region(base, iomem_size); #endif return ret; } static void generic_NCR5380_release_resources(struct Scsi_Host *instance) { scsi_remove_host(instance); if (instance->irq != NO_IRQ) free_irq(instance->irq, instance); NCR5380_exit(instance); #ifndef SCSI_G_NCR5380_MEM release_region(instance->io_port, instance->n_io_port); #else { struct NCR5380_hostdata *hostdata = shost_priv(instance); iounmap(hostdata->iomem); release_mem_region(instance->base, hostdata->iomem_size); } #endif scsi_host_put(instance); } /** * generic_NCR5380_pread - pseudo DMA read * @instance: adapter to read from * @dst: buffer to read into * @len: buffer length * * Perform a pseudo DMA mode read from an NCR53C400 or equivalent * controller */ static inline int generic_NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len) { struct NCR5380_hostdata *hostdata = shost_priv(instance); int blocks = len / 128; int start = 0; NCR5380_write(hostdata->c400_ctl_status, CSR_BASE | CSR_TRANS_DIR); NCR5380_write(hostdata->c400_blk_cnt, blocks); while (1) { if (NCR5380_read(hostdata->c400_blk_cnt) == 0) break; if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) { printk(KERN_ERR "53C400r: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks); return -1; } while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) ; /* FIXME - no timeout */ #ifndef SCSI_G_NCR5380_MEM if (hostdata->io_width == 2) insw(instance->io_port + hostdata->c400_host_buf, dst + start, 64); else insb(instance->io_port + hostdata->c400_host_buf, dst + start, 128); #else /* implies SCSI_G_NCR5380_MEM */ memcpy_fromio(dst + start, hostdata->iomem + NCR53C400_host_buffer, 128); #endif start += 128; blocks--; } if (blocks) { while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) ; /* FIXME - no timeout */ #ifndef SCSI_G_NCR5380_MEM if (hostdata->io_width == 2) insw(instance->io_port + hostdata->c400_host_buf, dst + start, 64); else insb(instance->io_port + hostdata->c400_host_buf, dst + start, 128); #else /* implies SCSI_G_NCR5380_MEM */ memcpy_fromio(dst + start, hostdata->iomem + NCR53C400_host_buffer, 128); #endif start += 128; blocks--; } if (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ)) printk("53C400r: no 53C80 gated irq after transfer"); /* wait for 53C80 registers to be available */ while (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG)) ; if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) printk(KERN_ERR "53C400r: no end dma signal\n"); return 0; } /** * generic_NCR5380_pwrite - pseudo DMA write * @instance: adapter to read from * @dst: buffer to read into * @len: buffer length * * Perform a pseudo DMA mode read from an NCR53C400 or equivalent * controller */ static inline int generic_NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len) { struct NCR5380_hostdata *hostdata = shost_priv(instance); int blocks = len / 128; int start = 0; NCR5380_write(hostdata->c400_ctl_status, CSR_BASE); NCR5380_write(hostdata->c400_blk_cnt, blocks); while (1) { if (NCR5380_read(hostdata->c400_ctl_status) & CSR_GATED_53C80_IRQ) { printk(KERN_ERR "53C400w: Got 53C80_IRQ start=%d, blocks=%d\n", start, blocks); return -1; } if (NCR5380_read(hostdata->c400_blk_cnt) == 0) break; while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) ; // FIXME - timeout #ifndef SCSI_G_NCR5380_MEM if (hostdata->io_width == 2) outsw(instance->io_port + hostdata->c400_host_buf, src + start, 64); else outsb(instance->io_port + hostdata->c400_host_buf, src + start, 128); #else /* implies SCSI_G_NCR5380_MEM */ memcpy_toio(hostdata->iomem + NCR53C400_host_buffer, src + start, 128); #endif start += 128; blocks--; } if (blocks) { while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY) ; // FIXME - no timeout #ifndef SCSI_G_NCR5380_MEM if (hostdata->io_width == 2) outsw(instance->io_port + hostdata->c400_host_buf, src + start, 64); else outsb(instance->io_port + hostdata->c400_host_buf, src + start, 128); #else /* implies SCSI_G_NCR5380_MEM */ memcpy_toio(hostdata->iomem + NCR53C400_host_buffer, src + start, 128); #endif start += 128; blocks--; } /* wait for 53C80 registers to be available */ while (!(NCR5380_read(hostdata->c400_ctl_status) & CSR_53C80_REG)) { udelay(4); /* DTC436 chip hangs without this */ /* FIXME - no timeout */ } if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_END_DMA_TRANSFER)) { printk(KERN_ERR "53C400w: no end dma signal\n"); } while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT)) ; // TIMEOUT return 0; } static int generic_NCR5380_dma_xfer_len(struct Scsi_Host *instance, struct scsi_cmnd *cmd) { struct NCR5380_hostdata *hostdata = shost_priv(instance); int transfersize = cmd->transfersize; if (hostdata->flags & FLAG_NO_PSEUDO_DMA) return 0; /* Limit transfers to 32K, for xx400 & xx406 * pseudoDMA that transfers in 128 bytes blocks. */ if (transfersize > 32 * 1024 && cmd->SCp.this_residual && !(cmd->SCp.this_residual % transfersize)) transfersize = 32 * 1024; /* 53C400 datasheet: non-modulo-128-byte transfers should use PIO */ if (transfersize % 128) transfersize = 0; return transfersize; } /* * Include the NCR5380 core code that we build our driver around */ #include "NCR5380.c" static struct scsi_host_template driver_template = { .module = THIS_MODULE, .proc_name = DRV_MODULE_NAME, .name = "Generic NCR5380/NCR53C400 SCSI", .info = generic_NCR5380_info, .queuecommand = generic_NCR5380_queue_command, .eh_abort_handler = generic_NCR5380_abort, .eh_bus_reset_handler = generic_NCR5380_bus_reset, .can_queue = 16, .this_id = 7, .sg_tablesize = SG_ALL, .cmd_per_lun = 2, .use_clustering = DISABLE_CLUSTERING, .cmd_size = NCR5380_CMD_SIZE, .max_sectors = 128, }; static int generic_NCR5380_isa_match(struct device *pdev, unsigned int ndev) { int ret = generic_NCR5380_init_one(&driver_template, pdev, base[ndev], irq[ndev], card[ndev]); if (ret) { if (base[ndev]) printk(KERN_WARNING "Card not found at address 0x%03x\n", base[ndev]); return 0; } return 1; } static int generic_NCR5380_isa_remove(struct device *pdev, unsigned int ndev) { generic_NCR5380_release_resources(dev_get_drvdata(pdev)); dev_set_drvdata(pdev, NULL); return 0; } static struct isa_driver generic_NCR5380_isa_driver = { .match = generic_NCR5380_isa_match, .remove = generic_NCR5380_isa_remove, .driver = { .name = DRV_MODULE_NAME }, }; #if !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP) static struct pnp_device_id generic_NCR5380_pnp_ids[] = { { .id = "DTC436e", .driver_data = BOARD_DTC3181E }, { .id = "" } }; MODULE_DEVICE_TABLE(pnp, generic_NCR5380_pnp_ids); static int generic_NCR5380_pnp_probe(struct pnp_dev *pdev, const struct pnp_device_id *id) { int base, irq; if (pnp_activate_dev(pdev) < 0) return -EBUSY; base = pnp_port_start(pdev, 0); irq = pnp_irq(pdev, 0); return generic_NCR5380_init_one(&driver_template, &pdev->dev, base, irq, id->driver_data); } static void generic_NCR5380_pnp_remove(struct pnp_dev *pdev) { generic_NCR5380_release_resources(pnp_get_drvdata(pdev)); pnp_set_drvdata(pdev, NULL); } static struct pnp_driver generic_NCR5380_pnp_driver = { .name = DRV_MODULE_NAME, .id_table = generic_NCR5380_pnp_ids, .probe = generic_NCR5380_pnp_probe, .remove = generic_NCR5380_pnp_remove, }; #endif /* !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP) */ static int pnp_registered, isa_registered; static int __init generic_NCR5380_init(void) { int ret = 0; /* compatibility with old-style parameters */ if (irq[0] == 0 && base[0] == 0 && card[0] == -1) { irq[0] = ncr_irq; base[0] = ncr_addr; if (ncr_5380) card[0] = BOARD_NCR5380; if (ncr_53c400) card[0] = BOARD_NCR53C400; if (ncr_53c400a) card[0] = BOARD_NCR53C400A; if (dtc_3181e) card[0] = BOARD_DTC3181E; if (hp_c2502) card[0] = BOARD_HP_C2502; } #if !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP) if (!pnp_register_driver(&generic_NCR5380_pnp_driver)) pnp_registered = 1; #endif ret = isa_register_driver(&generic_NCR5380_isa_driver, MAX_CARDS); if (!ret) isa_registered = 1; return (pnp_registered || isa_registered) ? 0 : ret; } static void __exit generic_NCR5380_exit(void) { #if !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP) if (pnp_registered) pnp_unregister_driver(&generic_NCR5380_pnp_driver); #endif if (isa_registered) isa_unregister_driver(&generic_NCR5380_isa_driver); } module_init(generic_NCR5380_init); module_exit(generic_NCR5380_exit);