+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8 -*- */
-
-/* NCR Dual 700 MCA SCSI Driver
- *
- * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
-**-----------------------------------------------------------------------------
-**
-** This program is free software; you can redistribute it and/or modify
-** it under the terms of the GNU General Public License as published by
-** the Free Software Foundation; either version 2 of the License, or
-** (at your option) any later version.
-**
-** This program is distributed in the hope that it will be useful,
-** but WITHOUT ANY WARRANTY; without even the implied warranty of
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-** GNU General Public License for more details.
-**
-** You should have received a copy of the GNU General Public License
-** along with this program; if not, write to the Free Software
-** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-**
-**-----------------------------------------------------------------------------
- */
-
-/* Notes:
- *
- * Most of the work is done in the chip specific module, 53c700.o
- *
- * TODO List:
- *
- * 1. Extract the SCSI ID from the voyager CMOS table (necessary to
- * support multi-host environments.
- *
- * */
-
-
-/* CHANGELOG
- *
- * Version 2.2
- *
- * Added mca_set_adapter_name().
- *
- * Version 2.1
- *
- * Modularise the driver into a Board piece (this file) and a chip
- * piece 53c700.[ch] and 53c700.scr, added module options. You can
- * now specify the scsi id by the parameters
- *
- * NCR_D700=slot:<n> [siop:<n>] id:<n> ....
- *
- * They need to be comma separated if compiled into the kernel
- *
- * Version 2.0
- *
- * Initial implementation of TCQ (Tag Command Queueing). TCQ is full
- * featured and uses the clock algorithm to keep track of outstanding
- * tags and guard against individual tag starvation. Also fixed a bug
- * in all of the 1.x versions where the D700_data_residue() function
- * was returning results off by 32 bytes (and thus causing the same 32
- * bytes to be written twice corrupting the data block). It turns out
- * the 53c700 only has a 6 bit DBC and DFIFO registers not 7 bit ones
- * like the 53c710 (The 710 is the only data manual still available,
- * which I'd been using to program the 700).
- *
- * Version 1.2
- *
- * Much improved message handling engine
- *
- * Version 1.1
- *
- * Add code to handle selection reasonably correctly. By the time we
- * get the selection interrupt, we've already responded, but drop off the
- * bus and hope the selector will go away.
- *
- * Version 1.0:
- *
- * Initial release. Fully functional except for procfs and tag
- * command queueing. Has only been tested on cards with 53c700-66
- * chips and only single ended. Features are
- *
- * 1. Synchronous data transfers to offset 8 (limit of 700-66) and
- * 100ns (10MHz) limit of SCSI-2
- *
- * 2. Disconnection and reselection
- *
- * Testing:
- *
- * I've only really tested this with the 700-66 chip, but have done
- * soak tests in multi-device environments to verify that
- * disconnections and reselections are being processed correctly.
- * */
-
-#define NCR_D700_VERSION "2.2"
-
-#include <linux/blkdev.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/mca.h>
-#include <linux/slab.h>
-#include <asm/io.h>
-#include <scsi/scsi_host.h>
-#include <scsi/scsi_device.h>
-#include <scsi/scsi_transport.h>
-#include <scsi/scsi_transport_spi.h>
-
-#include "53c700.h"
-#include "NCR_D700.h"
-
-static char *NCR_D700; /* command line from insmod */
-
-MODULE_AUTHOR("James Bottomley");
-MODULE_DESCRIPTION("NCR Dual700 SCSI Driver");
-MODULE_LICENSE("GPL");
-module_param(NCR_D700, charp, 0);
-
-static __u8 id_array[2*(MCA_MAX_SLOT_NR + 1)] =
- { [0 ... 2*(MCA_MAX_SLOT_NR + 1)-1] = 7 };
-
-#ifdef MODULE
-#define ARG_SEP ' '
-#else
-#define ARG_SEP ','
-#endif
-
-static int __init
-param_setup(char *string)
-{
- char *pos = string, *next;
- int slot = -1, siop = -1;
-
- while(pos != NULL && (next = strchr(pos, ':')) != NULL) {
- int val = (int)simple_strtoul(++next, NULL, 0);
-
- if(!strncmp(pos, "slot:", 5))
- slot = val;
- else if(!strncmp(pos, "siop:", 5))
- siop = val;
- else if(!strncmp(pos, "id:", 3)) {
- if(slot == -1) {
- printk(KERN_WARNING "NCR D700: Must specify slot for id parameter\n");
- } else if(slot > MCA_MAX_SLOT_NR) {
- printk(KERN_WARNING "NCR D700: Illegal slot %d for id %d\n", slot, val);
- } else {
- if(siop != 0 && siop != 1) {
- id_array[slot*2] = val;
- id_array[slot*2 + 1] =val;
- } else {
- id_array[slot*2 + siop] = val;
- }
- }
- }
- if((pos = strchr(pos, ARG_SEP)) != NULL)
- pos++;
- }
- return 1;
-}
-
-/* Host template. The 53c700 routine NCR_700_detect will
- * fill in all of the missing routines */
-static struct scsi_host_template NCR_D700_driver_template = {
- .module = THIS_MODULE,
- .name = "NCR Dual 700 MCA",
- .proc_name = "NCR_D700",
- .this_id = 7,
-};
-
-/* We needs this helper because we have two hosts per struct device */
-struct NCR_D700_private {
- struct device *dev;
- struct Scsi_Host *hosts[2];
- char name[30];
- char pad;
-};
-
-static int
-NCR_D700_probe_one(struct NCR_D700_private *p, int siop, int irq,
- int slot, u32 region, int differential)
-{
- struct NCR_700_Host_Parameters *hostdata;
- struct Scsi_Host *host;
- int ret;
-
- hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
- if (!hostdata) {
- printk(KERN_ERR "NCR D700: SIOP%d: Failed to allocate host"
- "data, detatching\n", siop);
- return -ENOMEM;
- }
-
- if (!request_region(region, 64, "NCR_D700")) {
- printk(KERN_ERR "NCR D700: Failed to reserve IO region 0x%x\n",
- region);
- ret = -ENODEV;
- goto region_failed;
- }
-
- /* Fill in the three required pieces of hostdata */
- hostdata->base = ioport_map(region, 64);
- hostdata->differential = (((1<<siop) & differential) != 0);
- hostdata->clock = NCR_D700_CLOCK_MHZ;
- hostdata->burst_length = 8;
-
- /* and register the siop */
- host = NCR_700_detect(&NCR_D700_driver_template, hostdata, p->dev);
- if (!host) {
- ret = -ENOMEM;
- goto detect_failed;
- }
-
- p->hosts[siop] = host;
- /* FIXME: read this from SUS */
- host->this_id = id_array[slot * 2 + siop];
- host->irq = irq;
- host->base = region;
- scsi_scan_host(host);
-
- return 0;
-
- detect_failed:
- release_region(region, 64);
- region_failed:
- kfree(hostdata);
-
- return ret;
-}
-
-static irqreturn_t
-NCR_D700_intr(int irq, void *data)
-{
- struct NCR_D700_private *p = (struct NCR_D700_private *)data;
- int i, found = 0;
-
- for (i = 0; i < 2; i++)
- if (p->hosts[i] &&
- NCR_700_intr(irq, p->hosts[i]) == IRQ_HANDLED)
- found++;
-
- return found ? IRQ_HANDLED : IRQ_NONE;
-}
-
-/* Detect a D700 card. Note, because of the setup --- the chips are
- * essentially connectecd to the MCA bus independently, it is easier
- * to set them up as two separate host adapters, rather than one
- * adapter with two channels */
-static int
-NCR_D700_probe(struct device *dev)
-{
- struct NCR_D700_private *p;
- int differential;
- static int banner = 1;
- struct mca_device *mca_dev = to_mca_device(dev);
- int slot = mca_dev->slot;
- int found = 0;
- int irq, i;
- int pos3j, pos3k, pos3a, pos3b, pos4;
- __u32 base_addr, offset_addr;
-
- /* enable board interrupt */
- pos4 = mca_device_read_pos(mca_dev, 4);
- pos4 |= 0x4;
- mca_device_write_pos(mca_dev, 4, pos4);
-
- mca_device_write_pos(mca_dev, 6, 9);
- pos3j = mca_device_read_pos(mca_dev, 3);
- mca_device_write_pos(mca_dev, 6, 10);
- pos3k = mca_device_read_pos(mca_dev, 3);
- mca_device_write_pos(mca_dev, 6, 0);
- pos3a = mca_device_read_pos(mca_dev, 3);
- mca_device_write_pos(mca_dev, 6, 1);
- pos3b = mca_device_read_pos(mca_dev, 3);
-
- base_addr = ((pos3j << 8) | pos3k) & 0xfffffff0;
- offset_addr = ((pos3a << 8) | pos3b) & 0xffffff70;
-
- irq = (pos4 & 0x3) + 11;
- if(irq >= 13)
- irq++;
- if(banner) {
- printk(KERN_NOTICE "NCR D700: Driver Version " NCR_D700_VERSION "\n"
- "NCR D700: Copyright (c) 2001 by James.Bottomley@HansenPartnership.com\n"
- "NCR D700:\n");
- banner = 0;
- }
- /* now do the bus related transforms */
- irq = mca_device_transform_irq(mca_dev, irq);
- base_addr = mca_device_transform_ioport(mca_dev, base_addr);
- offset_addr = mca_device_transform_ioport(mca_dev, offset_addr);
-
- printk(KERN_NOTICE "NCR D700: found in slot %d irq = %d I/O base = 0x%x\n", slot, irq, offset_addr);
-
- /*outb(BOARD_RESET, base_addr);*/
-
- /* clear any pending interrupts */
- (void)inb(base_addr + 0x08);
- /* get modctl, used later for setting diff bits */
- switch(differential = (inb(base_addr + 0x08) >> 6)) {
- case 0x00:
- /* only SIOP1 differential */
- differential = 0x02;
- break;
- case 0x01:
- /* Both SIOPs differential */
- differential = 0x03;
- break;
- case 0x03:
- /* No SIOPs differential */
- differential = 0x00;
- break;
- default:
- printk(KERN_ERR "D700: UNEXPECTED DIFFERENTIAL RESULT 0x%02x\n",
- differential);
- differential = 0x00;
- break;
- }
-
- p = kzalloc(sizeof(*p), GFP_KERNEL);
- if (!p)
- return -ENOMEM;
-
- p->dev = dev;
- snprintf(p->name, sizeof(p->name), "D700(%s)", dev_name(dev));
- if (request_irq(irq, NCR_D700_intr, IRQF_SHARED, p->name, p)) {
- printk(KERN_ERR "D700: request_irq failed\n");
- kfree(p);
- return -EBUSY;
- }
- /* plumb in both 700 chips */
- for (i = 0; i < 2; i++) {
- int err;
-
- if ((err = NCR_D700_probe_one(p, i, irq, slot,
- offset_addr + (0x80 * i),
- differential)) != 0)
- printk("D700: SIOP%d: probe failed, error = %d\n",
- i, err);
- else
- found++;
- }
-
- if (!found) {
- kfree(p);
- return -ENODEV;
- }
-
- mca_device_set_claim(mca_dev, 1);
- mca_device_set_name(mca_dev, "NCR_D700");
- dev_set_drvdata(dev, p);
- return 0;
-}
-
-static void
-NCR_D700_remove_one(struct Scsi_Host *host)
-{
- scsi_remove_host(host);
- NCR_700_release(host);
- kfree((struct NCR_700_Host_Parameters *)host->hostdata[0]);
- free_irq(host->irq, host);
- release_region(host->base, 64);
-}
-
-static int
-NCR_D700_remove(struct device *dev)
-{
- struct NCR_D700_private *p = dev_get_drvdata(dev);
- int i;
-
- for (i = 0; i < 2; i++)
- NCR_D700_remove_one(p->hosts[i]);
-
- kfree(p);
- return 0;
-}
-
-static short NCR_D700_id_table[] = { NCR_D700_MCA_ID, 0 };
-
-static struct mca_driver NCR_D700_driver = {
- .id_table = NCR_D700_id_table,
- .driver = {
- .name = "NCR_D700",
- .bus = &mca_bus_type,
- .probe = NCR_D700_probe,
- .remove = NCR_D700_remove,
- },
-};
-
-static int __init NCR_D700_init(void)
-{
-#ifdef MODULE
- if (NCR_D700)
- param_setup(NCR_D700);
-#endif
-
- return mca_register_driver(&NCR_D700_driver);
-}
-
-static void __exit NCR_D700_exit(void)
-{
- mca_unregister_driver(&NCR_D700_driver);
-}
-
-module_init(NCR_D700_init);
-module_exit(NCR_D700_exit);
-
-__setup("NCR_D700=", param_setup);
projects / openwrt / staging / blogic.git / commitdiff