+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8 -*- */
-
-/* NCR Quad 720 MCA SCSI Driver
- *
- * Copyright (C) 2003 by James.Bottomley@HansenPartnership.com
- */
-
-#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 <linux/types.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <asm/io.h>
-
-#include "scsi.h"
-#include <scsi/scsi_host.h>
-
-#include "ncr53c8xx.h"
-
-#include "NCR_Q720.h"
-
-static struct ncr_chip q720_chip __initdata = {
- .revision_id = 0x0f,
- .burst_max = 3,
- .offset_max = 8,
- .nr_divisor = 4,
- .features = FE_WIDE | FE_DIFF | FE_VARCLK,
-};
-
-MODULE_AUTHOR("James Bottomley");
-MODULE_DESCRIPTION("NCR Quad 720 SCSI Driver");
-MODULE_LICENSE("GPL");
-
-#define NCR_Q720_VERSION "0.9"
-
-/* We needs this helper because we have up to four hosts per struct device */
-struct NCR_Q720_private {
- struct device *dev;
- void __iomem * mem_base;
- __u32 phys_mem_base;
- __u32 mem_size;
- __u8 irq;
- __u8 siops;
- __u8 irq_enable;
- struct Scsi_Host *hosts[4];
-};
-
-static struct scsi_host_template NCR_Q720_tpnt = {
- .module = THIS_MODULE,
- .proc_name = "NCR_Q720",
-};
-
-static irqreturn_t
-NCR_Q720_intr(int irq, void *data)
-{
- struct NCR_Q720_private *p = (struct NCR_Q720_private *)data;
- __u8 sir = (readb(p->mem_base + 0x0d) & 0xf0) >> 4;
- __u8 siop;
-
- sir |= ~p->irq_enable;
-
- if(sir == 0xff)
- return IRQ_NONE;
-
-
- while((siop = ffz(sir)) < p->siops) {
- sir |= 1<<siop;
- ncr53c8xx_intr(irq, p->hosts[siop]);
- }
- return IRQ_HANDLED;
-}
-
-static int __init
-NCR_Q720_probe_one(struct NCR_Q720_private *p, int siop,
- int irq, int slot, __u32 paddr, void __iomem *vaddr)
-{
- struct ncr_device device;
- __u8 scsi_id;
- static int unit = 0;
- __u8 scsr1 = readb(vaddr + NCR_Q720_SCSR_OFFSET + 1);
- __u8 differential = readb(vaddr + NCR_Q720_SCSR_OFFSET) & 0x20;
- __u8 version;
- int error;
-
- scsi_id = scsr1 >> 4;
- /* enable burst length 16 (FIXME: should allow this) */
- scsr1 |= 0x02;
- /* force a siop reset */
- scsr1 |= 0x04;
- writeb(scsr1, vaddr + NCR_Q720_SCSR_OFFSET + 1);
- udelay(10);
- version = readb(vaddr + 0x18) >> 4;
-
- memset(&device, 0, sizeof(struct ncr_device));
- /* Initialise ncr_device structure with items required by ncr_attach. */
- device.chip = q720_chip;
- device.chip.revision_id = version;
- device.host_id = scsi_id;
- device.dev = p->dev;
- device.slot.base = paddr;
- device.slot.base_c = paddr;
- device.slot.base_v = vaddr;
- device.slot.irq = irq;
- device.differential = differential ? 2 : 0;
- printk("Q720 probe unit %d (siop%d) at 0x%lx, diff = %d, vers = %d\n", unit, siop,
- (unsigned long)paddr, differential, version);
-
- p->hosts[siop] = ncr_attach(&NCR_Q720_tpnt, unit++, &device);
-
- if (!p->hosts[siop])
- goto fail;
-
- p->irq_enable |= (1<<siop);
- scsr1 = readb(vaddr + NCR_Q720_SCSR_OFFSET + 1);
- /* clear the disable interrupt bit */
- scsr1 &= ~0x01;
- writeb(scsr1, vaddr + NCR_Q720_SCSR_OFFSET + 1);
-
- error = scsi_add_host(p->hosts[siop], p->dev);
- if (error)
- ncr53c8xx_release(p->hosts[siop]);
- else
- scsi_scan_host(p->hosts[siop]);
- return error;
-
- fail:
- return -ENODEV;
-}
-
-/* Detect a Q720 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 __init
-NCR_Q720_probe(struct device *dev)
-{
- struct NCR_Q720_private *p;
- static int banner = 1;
- struct mca_device *mca_dev = to_mca_device(dev);
- int slot = mca_dev->slot;
- int found = 0;
- int irq, i, siops;
- __u8 pos2, pos4, asr2, asr9, asr10;
- __u16 io_base;
- __u32 base_addr, mem_size;
- void __iomem *mem_base;
-
- p = kzalloc(sizeof(*p), GFP_KERNEL);
- if (!p)
- return -ENOMEM;
-
- pos2 = mca_device_read_pos(mca_dev, 2);
- /* enable device */
- pos2 |= NCR_Q720_POS2_BOARD_ENABLE | NCR_Q720_POS2_INTERRUPT_ENABLE;
- mca_device_write_pos(mca_dev, 2, pos2);
-
- io_base = (pos2 & NCR_Q720_POS2_IO_MASK) << NCR_Q720_POS2_IO_SHIFT;
-
-
- if(banner) {
- printk(KERN_NOTICE "NCR Q720: Driver Version " NCR_Q720_VERSION "\n"
- "NCR Q720: Copyright (c) 2003 by James.Bottomley@HansenPartnership.com\n"
- "NCR Q720:\n");
- banner = 0;
- }
- io_base = mca_device_transform_ioport(mca_dev, io_base);
-
- /* OK, this is phase one of the bootstrap, we now know the
- * I/O space base address. All the configuration registers
- * are mapped here (including pos) */
-
- /* sanity check I/O mapping */
- i = inb(io_base) | (inb(io_base+1)<<8);
- if(i != NCR_Q720_MCA_ID) {
- printk(KERN_ERR "NCR_Q720, adapter failed to I/O map registers correctly at 0x%x(0x%x)\n", io_base, i);
- kfree(p);
- return -ENODEV;
- }
-
- /* Phase II, find the ram base and memory map the board register */
- pos4 = inb(io_base + 4);
- /* enable streaming data */
- pos4 |= 0x01;
- outb(pos4, io_base + 4);
- base_addr = (pos4 & 0x7e) << 20;
- base_addr += (pos4 & 0x80) << 23;
- asr10 = inb(io_base + 0x12);
- base_addr += (asr10 & 0x80) << 24;
- base_addr += (asr10 & 0x70) << 23;
-
- /* OK, got the base addr, now we need to find the ram size,
- * enable and map it */
- asr9 = inb(io_base + 0x11);
- i = (asr9 & 0xc0) >> 6;
- if(i == 0)
- mem_size = 1024;
- else
- mem_size = 1 << (19 + i);
-
- /* enable the sram mapping */
- asr9 |= 0x20;
-
- /* disable the rom mapping */
- asr9 &= ~0x10;
-
- outb(asr9, io_base + 0x11);
-
- if(!request_mem_region(base_addr, mem_size, "NCR_Q720")) {
- printk(KERN_ERR "NCR_Q720: Failed to claim memory region 0x%lx\n-0x%lx",
- (unsigned long)base_addr,
- (unsigned long)(base_addr + mem_size));
- goto out_free;
- }
-
- if (dma_declare_coherent_memory(dev, base_addr, base_addr,
- mem_size, 0)) {
- printk(KERN_ERR "NCR_Q720: DMA declare memory failed\n");
- goto out_release_region;
- }
-
- /* The first 1k of the memory buffer is a memory map of the registers
- */
- mem_base = dma_mark_declared_memory_occupied(dev, base_addr,
- 1024);
- if (IS_ERR(mem_base)) {
- printk("NCR_Q720 failed to reserve memory mapped region\n");
- goto out_release;
- }
-
- /* now also enable accesses in asr 2 */
- asr2 = inb(io_base + 0x0a);
-
- asr2 |= 0x01;
-
- outb(asr2, io_base + 0x0a);
-
- /* get the number of SIOPs (this should be 2 or 4) */
- siops = ((asr2 & 0xe0) >> 5) + 1;
-
- /* sanity check mapping (again) */
- i = readw(mem_base);
- if(i != NCR_Q720_MCA_ID) {
- printk(KERN_ERR "NCR_Q720, adapter failed to memory map registers correctly at 0x%lx(0x%x)\n", (unsigned long)base_addr, i);
- goto out_release;
- }
-
- irq = readb(mem_base + 5) & 0x0f;
-
-
- /* now do the bus related transforms */
- irq = mca_device_transform_irq(mca_dev, irq);
-
- printk(KERN_NOTICE "NCR Q720: found in slot %d irq = %d mem base = 0x%lx siops = %d\n", slot, irq, (unsigned long)base_addr, siops);
- printk(KERN_NOTICE "NCR Q720: On board ram %dk\n", mem_size/1024);
-
- p->dev = dev;
- p->mem_base = mem_base;
- p->phys_mem_base = base_addr;
- p->mem_size = mem_size;
- p->irq = irq;
- p->siops = siops;
-
- if (request_irq(irq, NCR_Q720_intr, IRQF_SHARED, "NCR_Q720", p)) {
- printk(KERN_ERR "NCR_Q720: request irq %d failed\n", irq);
- goto out_release;
- }
- /* disable all the siop interrupts */
- for(i = 0; i < siops; i++) {
- void __iomem *reg_scsr1 = mem_base + NCR_Q720_CHIP_REGISTER_OFFSET
- + i*NCR_Q720_SIOP_SHIFT + NCR_Q720_SCSR_OFFSET + 1;
- __u8 scsr1 = readb(reg_scsr1);
- scsr1 |= 0x01;
- writeb(scsr1, reg_scsr1);
- }
-
- /* plumb in all 720 chips */
- for (i = 0; i < siops; i++) {
- void __iomem *siop_v_base = mem_base + NCR_Q720_CHIP_REGISTER_OFFSET
- + i*NCR_Q720_SIOP_SHIFT;
- __u32 siop_p_base = base_addr + NCR_Q720_CHIP_REGISTER_OFFSET
- + i*NCR_Q720_SIOP_SHIFT;
- __u16 port = io_base + NCR_Q720_CHIP_REGISTER_OFFSET
- + i*NCR_Q720_SIOP_SHIFT;
- int err;
-
- outb(0xff, port + 0x40);
- outb(0x07, port + 0x41);
- if ((err = NCR_Q720_probe_one(p, i, irq, slot,
- siop_p_base, siop_v_base)) != 0)
- printk("Q720: 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_Q720");
- dev_set_drvdata(dev, p);
-
- return 0;
-
- out_release:
- dma_release_declared_memory(dev);
- out_release_region:
- release_mem_region(base_addr, mem_size);
- out_free:
- kfree(p);
-
- return -ENODEV;
-}
-
-static void __exit
-NCR_Q720_remove_one(struct Scsi_Host *host)
-{
- scsi_remove_host(host);
- ncr53c8xx_release(host);
-}
-
-static int __exit
-NCR_Q720_remove(struct device *dev)
-{
- struct NCR_Q720_private *p = dev_get_drvdata(dev);
- int i;
-
- for (i = 0; i < p->siops; i++)
- if(p->hosts[i])
- NCR_Q720_remove_one(p->hosts[i]);
-
- dma_release_declared_memory(dev);
- release_mem_region(p->phys_mem_base, p->mem_size);
- free_irq(p->irq, p);
- kfree(p);
- return 0;
-}
-
-static short NCR_Q720_id_table[] = { NCR_Q720_MCA_ID, 0 };
-
-static struct mca_driver NCR_Q720_driver = {
- .id_table = NCR_Q720_id_table,
- .driver = {
- .name = "NCR_Q720",
- .bus = &mca_bus_type,
- .probe = NCR_Q720_probe,
- .remove = NCR_Q720_remove,
- },
-};
-
-static int __init
-NCR_Q720_init(void)
-{
- int ret = ncr53c8xx_init();
- if (!ret)
- ret = mca_register_driver(&NCR_Q720_driver);
- if (ret)
- ncr53c8xx_exit();
- return ret;
-}
-
-static void __exit
-NCR_Q720_exit(void)
-{
- mca_unregister_driver(&NCR_Q720_driver);
- ncr53c8xx_exit();
-}
-
-module_init(NCR_Q720_init);
-module_exit(NCR_Q720_exit);
projects / linux-2.6-block.git / commitdiff