/* * linux/drivers/acorn/scsi/cumana_2.c * * Copyright (C) 1997-2000 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. * * Changelog: * 30-08-1997 RMK 0.0.0 Created, READONLY version. * 22-01-1998 RMK 0.0.1 Updated to 2.1.80. * 15-04-1998 RMK 0.0.1 Only do PIO if FAS216 will allow it. * 02-05-1998 RMK 0.0.2 Updated & added DMA support. * 27-06-1998 RMK Changed asm/delay.h to linux/delay.h * 18-08-1998 RMK 0.0.3 Fixed synchronous transfer depth. * 02-04-2000 RMK 0.0.4 Updated for new error handling code. */ #include #include #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 /* Configuration */ #define CUMANASCSI2_XTALFREQ 40 #define CUMANASCSI2_ASYNC_PERIOD 200 #define CUMANASCSI2_SYNC_DEPTH 7 /* * List of devices that the driver will recognise */ #define CUMANASCSI2_LIST { MANU_CUMANA, PROD_CUMANA_SCSI_2 } #define CUMANASCSI2_STATUS (0) #define STATUS_INT (1 << 0) #define STATUS_DRQ (1 << 1) #define STATUS_LATCHED (1 << 3) #define CUMANASCSI2_ALATCH (5) #define ALATCH_ENA_INT (3) #define ALATCH_DIS_INT (2) #define ALATCH_ENA_TERM (5) #define ALATCH_DIS_TERM (4) #define ALATCH_ENA_BIT32 (11) #define ALATCH_DIS_BIT32 (10) #define ALATCH_ENA_DMA (13) #define ALATCH_DIS_DMA (12) #define ALATCH_DMA_OUT (15) #define ALATCH_DMA_IN (14) #define CUMANASCSI2_PSEUDODMA (0x80) #define CUMANASCSI2_FAS216_OFFSET (0xc0) #define CUMANASCSI2_FAS216_SHIFT 0 /* * Version */ #define VER_MAJOR 0 #define VER_MINOR 0 #define VER_PATCH 4 static struct expansion_card *ecs[MAX_ECARDS]; /* * Use term=0,1,0,0,0 to turn terminators on/off */ static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 }; #define NR_SG 256 typedef struct { FAS216_Info info; /* other info... */ unsigned int status; /* card status register */ unsigned int alatch; /* Control register */ unsigned int terms; /* Terminator state */ unsigned int dmaarea; /* Pseudo DMA area */ struct scatterlist sg[NR_SG]; /* Scatter DMA list */ } CumanaScsi2_Info; #define CSTATUS_IRQ (1 << 0) #define CSTATUS_DRQ (1 << 1) /* Prototype: void cumanascsi_2_irqenable(ec, irqnr) * Purpose : Enable interrupts on Cumana SCSI 2 card * Params : ec - expansion card structure * : irqnr - interrupt number */ static void cumanascsi_2_irqenable(struct expansion_card *ec, int irqnr) { unsigned int port = (unsigned int)ec->irq_data; outb(ALATCH_ENA_INT, port); } /* Prototype: void cumanascsi_2_irqdisable(ec, irqnr) * Purpose : Disable interrupts on Cumana SCSI 2 card * Params : ec - expansion card structure * : irqnr - interrupt number */ static void cumanascsi_2_irqdisable(struct expansion_card *ec, int irqnr) { unsigned int port = (unsigned int)ec->irq_data; outb(ALATCH_DIS_INT, port); } static const expansioncard_ops_t cumanascsi_2_ops = { cumanascsi_2_irqenable, cumanascsi_2_irqdisable, NULL, NULL, NULL, NULL }; /* Prototype: void cumanascsi_2_terminator_ctl(host, on_off) * Purpose : Turn the Cumana SCSI 2 terminators on or off * Params : host - card to turn on/off * : on_off - !0 to turn on, 0 to turn off */ static void cumanascsi_2_terminator_ctl(struct Scsi_Host *host, int on_off) { CumanaScsi2_Info *info = (CumanaScsi2_Info *)host->hostdata; if (on_off) { info->terms = 1; outb (ALATCH_ENA_TERM, info->alatch); } else { info->terms = 0; outb (ALATCH_DIS_TERM, info->alatch); } } /* Prototype: void cumanascsi_2_intr(irq, *dev_id, *regs) * Purpose : handle interrupts from Cumana SCSI 2 card * Params : irq - interrupt number * dev_id - user-defined (Scsi_Host structure) * regs - processor registers at interrupt */ static void cumanascsi_2_intr(int irq, void *dev_id, struct pt_regs *regs) { struct Scsi_Host *host = (struct Scsi_Host *)dev_id; fas216_intr(host); } /* Prototype: fasdmatype_t cumanascsi_2_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 cumanascsi_2_dma_setup(struct Scsi_Host *host, Scsi_Pointer *SCp, fasdmadir_t direction, fasdmatype_t min_type) { CumanaScsi2_Info *info = (CumanaScsi2_Info *)host->hostdata; int dmach = host->dma_channel; outb(ALATCH_DIS_DMA, info->alatch); if (dmach != NO_DMA && (min_type == fasdma_real_all || SCp->this_residual >= 512)) { int bufs = SCp->buffers_residual; int pci_dir, dma_dir, alatch_dir; if (bufs) memcpy(info->sg + 1, SCp->buffer + 1, sizeof(struct scatterlist) * bufs); info->sg[0].address = SCp->ptr; info->sg[0].page = NULL; info->sg[0].length = SCp->this_residual; if (direction == DMA_OUT) pci_dir = PCI_DMA_TODEVICE, dma_dir = DMA_MODE_WRITE, alatch_dir = ALATCH_DMA_OUT; else pci_dir = PCI_DMA_FROMDEVICE, dma_dir = DMA_MODE_READ, alatch_dir = ALATCH_DMA_IN; pci_map_sg(NULL, info->sg, bufs + 1, pci_dir); disable_dma(dmach); set_dma_sg(dmach, info->sg, bufs + 1); outb(alatch_dir, info->alatch); set_dma_mode(dmach, dma_dir); enable_dma(dmach); outb(ALATCH_ENA_DMA, info->alatch); outb(ALATCH_DIS_BIT32, info->alatch); return fasdma_real_all; } /* * If we're not doing DMA, * we'll do pseudo DMA */ return fasdma_pio; } /* * Prototype: void cumanascsi_2_dma_pseudo(host, SCpnt, direction, transfer) * Purpose : handles pseudo DMA * Params : host - host * SCpnt - command * direction - DMA on to/off of card * transfer - minimum number of bytes we expect to transfer */ static void cumanascsi_2_dma_pseudo(struct Scsi_Host *host, Scsi_Pointer *SCp, fasdmadir_t direction, int transfer) { CumanaScsi2_Info *info = (CumanaScsi2_Info *)host->hostdata; unsigned int length; unsigned char *addr; length = SCp->this_residual; addr = SCp->ptr; if (direction == DMA_OUT) #if 0 while (length > 1) { unsigned long word; unsigned int status = inb(info->status); if (status & STATUS_INT) goto end; if (!(status & STATUS_DRQ)) continue; word = *addr | *(addr + 1) << 8; outw (info->dmaarea); addr += 2; length -= 2; } #else printk ("PSEUDO_OUT???\n"); #endif else { if (transfer && (transfer & 255)) { while (length >= 256) { unsigned int status = inb(info->status); if (status & STATUS_INT) goto end; if (!(status & STATUS_DRQ)) continue; insw(info->dmaarea, addr, 256 >> 1); addr += 256; length -= 256; } } while (length > 0) { unsigned long word; unsigned int status = inb(info->status); if (status & STATUS_INT) goto end; if (!(status & STATUS_DRQ)) continue; word = inw (info->dmaarea); *addr++ = word; if (--length > 0) { *addr++ = word >> 8; length --; } } } end: } /* Prototype: int cumanascsi_2_dma_stop(host, SCpnt) * Purpose : stops DMA/PIO * Params : host - host * SCpnt - command */ static void cumanascsi_2_dma_stop(struct Scsi_Host *host, Scsi_Pointer *SCp) { CumanaScsi2_Info *info = (CumanaScsi2_Info *)host->hostdata; if (host->dma_channel != NO_DMA) { outb(ALATCH_DIS_DMA, info->alatch); disable_dma(host->dma_channel); } } /* Prototype: int cumanascsi_2_detect(Scsi_Host_Template * tpnt) * Purpose : initialises Cumana SCSI 2 driver * Params : tpnt - template for this SCSI adapter * Returns : >0 if host found, 0 otherwise. */ int cumanascsi_2_detect(Scsi_Host_Template *tpnt) { static const card_ids cumanascsi_2_cids[] = { CUMANASCSI2_LIST, { 0xffff, 0xffff} }; int count = 0; struct Scsi_Host *host; tpnt->proc_name = "cumanascs2"; memset(ecs, 0, sizeof (ecs)); ecard_startfind(); while (1) { CumanaScsi2_Info *info; ecs[count] = ecard_find(0, cumanascsi_2_cids); if (!ecs[count]) break; ecard_claim(ecs[count]); host = scsi_register(tpnt, sizeof (CumanaScsi2_Info)); if (!host) { ecard_release(ecs[count]); break; } host->io_port = ecard_address(ecs[count], ECARD_MEMC, 0); host->irq = ecs[count]->irq; host->dma_channel = ecs[count]->dma; info = (CumanaScsi2_Info *)host->hostdata; info->terms = term[count] ? 1 : 0; cumanascsi_2_terminator_ctl(host, info->terms); info->info.scsi.io_port = host->io_port + CUMANASCSI2_FAS216_OFFSET; info->info.scsi.io_shift = CUMANASCSI2_FAS216_SHIFT; info->info.scsi.irq = host->irq; info->info.ifcfg.clockrate = CUMANASCSI2_XTALFREQ; info->info.ifcfg.select_timeout = 255; info->info.ifcfg.asyncperiod = CUMANASCSI2_ASYNC_PERIOD; info->info.ifcfg.sync_max_depth = CUMANASCSI2_SYNC_DEPTH; 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.dma.setup = cumanascsi_2_dma_setup; info->info.dma.pseudo = cumanascsi_2_dma_pseudo; info->info.dma.stop = cumanascsi_2_dma_stop; info->dmaarea = host->io_port + CUMANASCSI2_PSEUDODMA; info->status = host->io_port + CUMANASCSI2_STATUS; info->alatch = host->io_port + CUMANASCSI2_ALATCH; ecs[count]->irqaddr = (unsigned char *)ioaddr(info->status); ecs[count]->irqmask = STATUS_INT; ecs[count]->irq_data = (void *)info->alatch; ecs[count]->ops = (expansioncard_ops_t *)&cumanascsi_2_ops; request_region(host->io_port + CUMANASCSI2_FAS216_OFFSET, 16 << CUMANASCSI2_FAS216_SHIFT, "cumanascsi2-fas"); if (host->irq != NO_IRQ && request_irq(host->irq, cumanascsi_2_intr, SA_INTERRUPT, "cumanascsi2", host)) { printk("scsi%d: IRQ%d not free, interrupts disabled\n", host->host_no, host->irq); host->irq = NO_IRQ; info->info.scsi.irq = NO_IRQ; } if (host->dma_channel != NO_DMA && request_dma(host->dma_channel, "cumanascsi2")) { printk("scsi%d: DMA%d not free, DMA disabled\n", host->host_no, host->dma_channel); host->dma_channel = NO_DMA; } fas216_init(host); ++count; } return count; } /* Prototype: int cumanascsi_2_release(struct Scsi_Host * host) * Purpose : releases all resources used by this adapter * Params : host - driver host structure to return info for. */ int cumanascsi_2_release(struct Scsi_Host *host) { int i; fas216_release(host); if (host->irq != NO_IRQ) free_irq(host->irq, host); if (host->dma_channel != NO_DMA) free_dma(host->dma_channel); release_region(host->io_port + CUMANASCSI2_FAS216_OFFSET, 16 << CUMANASCSI2_FAS216_SHIFT); for (i = 0; i < MAX_ECARDS; i++) if (ecs[i] && host->io_port == ecard_address (ecs[i], ECARD_MEMC, 0)) ecard_release (ecs[i]); return 0; } /* Prototype: const char *cumanascsi_2_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 *cumanascsi_2_info(struct Scsi_Host *host) { CumanaScsi2_Info *info = (CumanaScsi2_Info *)host->hostdata; static char string[100], *p; p = string; p += sprintf(p, "%s ", host->hostt->name); p += fas216_info(&info->info, p); p += sprintf(p, "v%d.%d.%d terminators o%s", VER_MAJOR, VER_MINOR, VER_PATCH, info->terms ? "n" : "ff"); return string; } /* Prototype: int cumanascsi_2_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 cumanascsi_2_set_proc_info(struct Scsi_Host *host, char *buffer, int length) { int ret = length; if (length >= 11 && strcmp(buffer, "CUMANASCSI2") == 0) { buffer += 11; length -= 11; if (length >= 5 && strncmp(buffer, "term=", 5) == 0) { if (buffer[5] == '1') cumanascsi_2_terminator_ctl(host, 1); else if (buffer[5] == '0') cumanascsi_2_terminator_ctl(host, 0); else ret = -EINVAL; } else ret = -EINVAL; } else ret = -EINVAL; return ret; } /* Prototype: int cumanascsi_2_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 cumanascsi_2_proc_info (char *buffer, char **start, off_t offset, int length, int host_no, int inout) { int pos, begin; struct Scsi_Host *host = scsi_hostlist; CumanaScsi2_Info *info; Scsi_Device *scd; while (host) { if (host->host_no == host_no) break; host = host->next; } if (!host) return 0; if (inout == 1) return cumanascsi_2_set_proc_info(host, buffer, length); info = (CumanaScsi2_Info *)host->hostdata; begin = 0; pos = sprintf(buffer, "Cumana SCSI II driver version %d.%d.%d\n", VER_MAJOR, VER_MINOR, VER_PATCH); pos += fas216_print_host(&info->info, buffer + pos); pos += sprintf(buffer + pos, "Term : o%s\n", info->terms ? "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) { int len; proc_print_scsidevice(scd, buffer, &len, pos); pos += len; pos += sprintf(buffer+pos, "Extensions: "); if (scd->tagged_supported) pos += sprintf(buffer+pos, "TAG %sabled [%d] ", scd->tagged_queue ? "en" : "dis", scd->current_tag); pos += sprintf(buffer+pos, "\n"); 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 Scsi_Host_Template cumanascsi2_template = { module: THIS_MODULE, proc_info: cumanascsi_2_proc_info, name: "Cumana SCSI II", detect: cumanascsi_2_detect, release: cumanascsi_2_release, info: cumanascsi_2_info, bios_param: scsicam_bios_param, can_queue: 1, this_id: 7, sg_tablesize: SG_ALL, cmd_per_lun: 1, use_clustering: DISABLE_CLUSTERING, 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 }; static int __init cumanascsi2_init(void) { scsi_register_module(MODULE_SCSI_HA, &cumanascsi2_template); if (cumanascsi2_template.present) return 0; scsi_unregister_module(MODULE_SCSI_HA, &cumanascsi2_template); return -ENODEV; } static void __exit cumanascsi2_exit(void) { scsi_unregister_module(MODULE_SCSI_HA, &cumanascsi2_template); } module_init(cumanascsi2_init); module_exit(cumanascsi2_exit); MODULE_AUTHOR("Russell King"); MODULE_DESCRIPTION("Cumana SCSI-2 driver for Acorn machines"); MODULE_PARM(term, "1-8i"); MODULE_PARM_DESC(term, "SCSI bus termination"); MODULE_LICENSE("GPL"); EXPORT_NO_SYMBOLS;