/* * linux/drivers/acorn/scsi/powertec.c * * Copyright (C) 1997-2003 Russell King * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This driver is based on experimentation. Hence, it may have made * assumptions about the particular card that I have available, and * may not be reliable! * * Changelog: * 01-10-1997 RMK Created, READONLY version. * 15-02-1998 RMK Added DMA support and hardware definitions. * 15-04-1998 RMK Only do PIO if FAS216 will allow it. * 02-05-1998 RMK Moved DMA sg list into per-interface structure. * 27-06-1998 RMK Changed asm/delay.h to linux/delay.h * 02-04-2000 RMK Updated for new error handling code. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../../scsi/sd.h" #include "../../scsi/hosts.h" #include "fas216.h" #include "scsi.h" #include /* * List of devices that the driver will recognise */ #define POWERTECSCSI_LIST { MANU_ALSYSTEMS, PROD_ALSYS_SCSIATAPI } #define POWERTEC_FAS216_OFFSET 0xc00 #define POWERTEC_FAS216_SHIFT 4 #define POWERTEC_INTR_STATUS 0x800 #define POWERTEC_INTR_BIT 0x80 #define POWERTEC_RESET_CONTROL 0x406 #define POWERTEC_RESET_BIT 1 #define POWERTEC_TERM_CONTROL 0x806 #define POWERTEC_TERM_ENABLE 1 #define POWERTEC_INTR_CONTROL 0x407 #define POWERTEC_INTR_ENABLE 1 #define POWERTEC_INTR_DISABLE 0 #define VERSION "1.10 (22/01/2003 2.4.19-rmk5)" /* * Use term=0,1,0,0,0 to turn terminators on/off. * One entry per slot. */ static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 }; #define NR_SG 256 struct powertec_info { FAS216_Info info; struct expansion_card *ec; unsigned int term_port; unsigned int term_ctl; struct scatterlist sg[NR_SG]; }; /* Prototype: void powertecscsi_irqenable(ec, irqnr) * Purpose : Enable interrupts on Powertec SCSI card * Params : ec - expansion card structure * : irqnr - interrupt number */ static void powertecscsi_irqenable(struct expansion_card *ec, int irqnr) { unsigned int port = (unsigned int)ec->irq_data; outb(POWERTEC_INTR_ENABLE, port); } /* Prototype: void powertecscsi_irqdisable(ec, irqnr) * Purpose : Disable interrupts on Powertec SCSI card * Params : ec - expansion card structure * : irqnr - interrupt number */ static void powertecscsi_irqdisable(struct expansion_card *ec, int irqnr) { unsigned int port = (unsigned int)ec->irq_data; outb(POWERTEC_INTR_DISABLE, port); } static const expansioncard_ops_t powertecscsi_ops = { .irqenable = powertecscsi_irqenable, .irqdisable = powertecscsi_irqdisable, }; /* Prototype: void powertecscsi_terminator_ctl(host, on_off) * Purpose : Turn the Powertec SCSI terminators on or off * Params : host - card to turn on/off * : on_off - !0 to turn on, 0 to turn off */ static void powertecscsi_terminator_ctl(struct Scsi_Host *host, int on_off) { struct powertec_info *info = (struct powertec_info *)host->hostdata; info->term_ctl = on_off ? POWERTEC_TERM_ENABLE : 0; outb(info->term_ctl, info->term_port); } /* Prototype: void powertecscsi_intr(irq, *dev_id, *regs) * Purpose : handle interrupts from Powertec SCSI card * Params : irq - interrupt number * dev_id - user-defined (Scsi_Host structure) * regs - processor registers at interrupt */ static void powertecscsi_intr(int irq, void *dev_id, struct pt_regs *regs) { fas216_intr(dev_id); } /* Prototype: fasdmatype_t powertecscsi_dma_setup(host, SCpnt, direction, min_type) * Purpose : initialises DMA/PIO * Params : host - host * SCpnt - command * direction - DMA on to/off of card * min_type - minimum DMA support that we must have for this transfer * Returns : type of transfer to be performed */ static fasdmatype_t powertecscsi_dma_setup(struct Scsi_Host *host, Scsi_Pointer *SCp, fasdmadir_t direction, fasdmatype_t min_type) { struct powertec_info *info = (struct powertec_info *)host->hostdata; int dmach = host->dma_channel; if (info->info.ifcfg.capabilities & FASCAP_DMA && min_type == fasdma_real_all) { int bufs, map_dir, dma_dir; bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG); if (direction == DMA_OUT) map_dir = PCI_DMA_TODEVICE, dma_dir = DMA_MODE_WRITE; else map_dir = PCI_DMA_FROMDEVICE, dma_dir = DMA_MODE_READ; pci_map_sg(NULL, info->sg, bufs, map_dir); disable_dma(dmach); set_dma_sg(dmach, info->sg, bufs); set_dma_mode(dmach, dma_dir); enable_dma(dmach); return fasdma_real_all; } /* * If we're not doing DMA, * we'll do slow PIO */ return fasdma_pio; } /* Prototype: int powertecscsi_dma_stop(host, SCpnt) * Purpose : stops DMA/PIO * Params : host - host * SCpnt - command */ static void powertecscsi_dma_stop(struct Scsi_Host *host, Scsi_Pointer *SCp) { if (host->dma_channel != NO_DMA) disable_dma(host->dma_channel); } /* Prototype: const char *powertecscsi_info(struct Scsi_Host * host) * Purpose : returns a descriptive string about this interface, * Params : host - driver host structure to return info for. * Returns : pointer to a static buffer containing null terminated string. */ const char *powertecscsi_info(struct Scsi_Host *host) { struct powertec_info *info = (struct powertec_info *)host->hostdata; static char string[150]; sprintf(string, "%s (%s) in slot %d v%s terminators o%s", host->hostt->name, info->info.scsi.type, info->ec->slot_no, VERSION, info->term_ctl ? "n" : "ff"); return string; } /* Prototype: int powertecscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length) * Purpose : Set a driver specific function * Params : host - host to setup * : buffer - buffer containing string describing operation * : length - length of string * Returns : -EINVAL, or 0 */ static int powertecscsi_set_proc_info(struct Scsi_Host *host, char *buffer, int length) { int ret = length; if (length >= 12 && strncmp(buffer, "POWERTECSCSI", 12) == 0) { buffer += 12; length -= 12; if (length >= 5 && strncmp(buffer, "term=", 5) == 0) { if (buffer[5] == '1') powertecscsi_terminator_ctl(host, 1); else if (buffer[5] == '0') powertecscsi_terminator_ctl(host, 0); else ret = -EINVAL; } else ret = -EINVAL; } else ret = -EINVAL; return ret; } /* Prototype: int powertecscsi_proc_info(char *buffer, char **start, off_t offset, * int length, int host_no, int inout) * Purpose : Return information about the driver to a user process accessing * the /proc filesystem. * Params : buffer - a buffer to write information to * start - a pointer into this buffer set by this routine to the start * of the required information. * offset - offset into information that we have read upto. * length - length of buffer * host_no - host number to return information for * inout - 0 for reading, 1 for writing. * Returns : length of data written to buffer. */ int powertecscsi_proc_info(char *buffer, char **start, off_t offset, int length, int host_no, int inout) { int pos, begin; struct Scsi_Host *host; struct powertec_info *info; Scsi_Device *scd; host = scsi_host_hn_get(host_no); if (!host) return 0; if (inout == 1) return powertecscsi_set_proc_info(host, buffer, length); info = (struct powertec_info *)host->hostdata; begin = 0; pos = sprintf(buffer, "PowerTec SCSI driver v%s\n", VERSION); pos += fas216_print_host(&info->info, buffer + pos); pos += sprintf(buffer + pos, "Term : o%s\n", info->term_ctl ? "n" : "ff"); pos += fas216_print_stats(&info->info, buffer + pos); pos += sprintf(buffer+pos, "\nAttached devices:\n"); for (scd = host->host_queue; scd; scd = scd->next) { pos += fas216_print_device(&info->info, scd, buffer + pos); if (pos + begin < offset) { begin += pos; pos = 0; } if (pos + begin > offset + length) break; } *start = buffer + (offset - begin); pos -= offset - begin; if (pos > length) pos = length; return pos; } static int powertecscsi_probe(struct expansion_card *ec); /* Prototype: int powertecscsi_detect(Scsi_Host_Template * tpnt) * Purpose : initialises PowerTec SCSI driver * Params : tpnt - template for this SCSI adapter * Returns : >0 if host found, 0 otherwise. */ static int powertecscsi_detect(Scsi_Host_Template *tpnt) { static const card_ids powertecscsi_cids[] = { POWERTECSCSI_LIST, { 0xffff, 0xffff} }; struct expansion_card *ec; int count = 0, ret; ecard_startfind(); while (1) { ec = ecard_find(0, powertecscsi_cids); if (!ec) break; ecard_claim(ec); ret = powertecscsi_probe(ec); if (ret) { ecard_release(ec); break; } ++count; } return count; } static void powertecscsi_remove(struct Scsi_Host *host); /* Prototype: int powertecscsi_release(struct Scsi_Host * host) * Purpose : releases all resources used by this adapter * Params : host - driver host structure to return info for. */ static int powertecscsi_release(struct Scsi_Host *host) { powertecscsi_remove(host); return 0; } static Scsi_Host_Template powertecscsi_template = { .module = THIS_MODULE, .proc_info = powertecscsi_proc_info, .name = "PowerTec SCSI", .detect = powertecscsi_detect, .release = powertecscsi_release, .info = powertecscsi_info, .bios_param = scsicam_bios_param, .command = fas216_command, .queuecommand = fas216_queue_command, .eh_host_reset_handler = fas216_eh_host_reset, .eh_bus_reset_handler = fas216_eh_bus_reset, .eh_device_reset_handler = fas216_eh_device_reset, .eh_abort_handler = fas216_eh_abort, .use_new_eh_code = 1, .can_queue = 1, .this_id = 7, .sg_tablesize = SG_ALL, .cmd_per_lun = 1, .use_clustering = ENABLE_CLUSTERING, .proc_name = "powertec", }; static int powertecscsi_probe(struct expansion_card *ec) { struct Scsi_Host *host; struct powertec_info *info; unsigned long base; int ret; base = ecard_address(ec, ECARD_IOC, ECARD_FAST); request_region(base + POWERTEC_FAS216_OFFSET, 16 << POWERTEC_FAS216_SHIFT, "powertec2-fas"); host = scsi_register(&powertecscsi_template, sizeof (struct powertec_info)); if (!host) { ret = -ENOMEM; goto out_region; } host->io_port = base; host->irq = ec->irq; host->dma_channel = ec->dma; ec->irqaddr = (unsigned char *)ioaddr(base + POWERTEC_INTR_STATUS); ec->irqmask = POWERTEC_INTR_BIT; ec->irq_data = (void *)(base + POWERTEC_INTR_CONTROL); ec->ops = (expansioncard_ops_t *)&powertecscsi_ops; info = (struct powertec_info *)host->hostdata; info->ec = ec; info->term_port = base + POWERTEC_TERM_CONTROL; powertecscsi_terminator_ctl(host, term[ec->slot_no]); info->info.scsi.io_port = host->io_port + POWERTEC_FAS216_OFFSET; info->info.scsi.io_shift = POWERTEC_FAS216_SHIFT; info->info.scsi.irq = host->irq; info->info.ifcfg.clockrate = 40; /* MHz */ info->info.ifcfg.select_timeout = 255; info->info.ifcfg.asyncperiod = 200; /* ns */ info->info.ifcfg.sync_max_depth = 7; info->info.ifcfg.cntl3 = CNTL3_BS8 | CNTL3_FASTSCSI | CNTL3_FASTCLK; info->info.ifcfg.disconnect_ok = 1; info->info.ifcfg.wide_max_size = 0; info->info.ifcfg.capabilities = 0; info->info.dma.setup = powertecscsi_dma_setup; info->info.dma.pseudo = NULL; info->info.dma.stop = powertecscsi_dma_stop; ret = fas216_init(host); if (ret) goto out_free; ret = request_irq(host->irq, powertecscsi_intr, SA_INTERRUPT, "powertec", &info->info); if (ret) { printk("scsi%d: IRQ%d not free: %d\n", host->host_no, host->irq, ret); goto out_release; } if (host->dma_channel != NO_DMA) { if (request_dma(host->dma_channel, "powertec")) { printk("scsi%d: DMA%d not free, using PIO\n", host->host_no, host->dma_channel); host->dma_channel = NO_DMA; } else { set_dma_speed(host->dma_channel, 180); info->info.ifcfg.capabilities |= FASCAP_DMA; } } ret = fas216_add(host); if (ret == 0) goto out; if (host->dma_channel != NO_DMA) free_dma(host->dma_channel); free_irq(host->irq, host); out_release: fas216_release(host); out_free: scsi_unregister(host); out_region: release_region(base + POWERTEC_FAS216_OFFSET, 16 << POWERTEC_FAS216_SHIFT); out: return ret; } static void powertecscsi_remove(struct Scsi_Host *host) { struct powertec_info *info = (struct powertec_info *)host->hostdata; fas216_remove(host); if (host->dma_channel != NO_DMA) free_dma(host->dma_channel); free_irq(host->irq, info); release_region(host->io_port + POWERTEC_FAS216_OFFSET, 16 << POWERTEC_FAS216_SHIFT); fas216_release(host); ecard_release(info->ec); } static int __init powertecscsi_init(void) { scsi_register_module(MODULE_SCSI_HA, &powertecscsi_template); if (powertecscsi_template.present) return 0; scsi_unregister_module(MODULE_SCSI_HA, &powertecscsi_template); return -ENODEV; } static void __exit powertecscsi_exit(void) { scsi_unregister_module(MODULE_SCSI_HA, &powertecscsi_template); } module_init(powertecscsi_init); module_exit(powertecscsi_exit); MODULE_AUTHOR("Russell King"); MODULE_DESCRIPTION("Powertec SCSI driver"); MODULE_PARM(term, "1-8i"); MODULE_PARM_DESC(term, "SCSI bus termination"); MODULE_LICENSE("GPL"); EXPORT_NO_SYMBOLS;