206 lines
5.0 KiB
C
206 lines
5.0 KiB
C
/*
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* Zalon 53c7xx device driver.
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* By Richard Hirst (rhirst@linuxcare.com)
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*/
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include "../parisc/gsc.h"
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#include "ncr53c8xx.h"
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MODULE_AUTHOR("Richard Hirst");
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MODULE_DESCRIPTION("Bluefish/Zalon 720 SCSI Driver");
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MODULE_LICENSE("GPL");
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#define GSC_SCSI_ZALON_OFFSET 0x800
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#define IO_MODULE_EIM (1*4)
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#define IO_MODULE_DC_ADATA (2*4)
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#define IO_MODULE_II_CDATA (3*4)
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#define IO_MODULE_IO_COMMAND (12*4)
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#define IO_MODULE_IO_STATUS (13*4)
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#define IOSTATUS_RY 0x40
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#define IOSTATUS_FE 0x80
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#define IOIIDATA_SMINT5L 0x40000000
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#define IOIIDATA_MINT5EN 0x20000000
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#define IOIIDATA_PACKEN 0x10000000
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#define IOIIDATA_PREFETCHEN 0x08000000
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#define IOIIDATA_IOII 0x00000020
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#define CMD_RESET 5
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static struct ncr_chip zalon720_chip __initdata = {
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.revision_id = 0x0f,
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.burst_max = 3,
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.offset_max = 8,
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.nr_divisor = 4,
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.features = FE_WIDE | FE_DIFF | FE_EHP| FE_MUX | FE_EA,
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};
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#if 0
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/* FIXME:
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* Is this function dead code? or is someone planning on using it in the
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* future. The clock = (int) pdc_result[16] does not look correct to
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* me ... I think it should be iodc_data[16]. Since this cause a compile
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* error with the new encapsulated PDC, I'm not compiling in this function.
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* - RB
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*/
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/* poke SCSI clock out of iodc data */
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static u8 iodc_data[32] __attribute__ ((aligned (64)));
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static unsigned long pdc_result[32] __attribute__ ((aligned (16))) ={0,0,0,0};
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static int
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lasi_scsi_clock(void * hpa, int defaultclock)
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{
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int clock, status;
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status = pdc_iodc_read(&pdc_result, hpa, 0, &iodc_data, 32 );
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if (status == PDC_RET_OK) {
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clock = (int) pdc_result[16];
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} else {
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printk(KERN_WARNING "%s: pdc_iodc_read returned %d\n", __FUNCTION__, status);
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clock = defaultclock;
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}
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printk(KERN_DEBUG "%s: SCSI clock %d\n", __FUNCTION__, clock);
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return clock;
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}
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#endif
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static struct scsi_host_template zalon7xx_template = {
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.module = THIS_MODULE,
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.proc_name = "zalon7xx",
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};
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static int __init
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zalon_probe(struct parisc_device *dev)
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{
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struct gsc_irq gsc_irq;
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u32 zalon_vers;
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int error = -ENODEV;
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void __iomem *zalon = ioremap_nocache(dev->hpa.start, 4096);
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void __iomem *io_port = zalon + GSC_SCSI_ZALON_OFFSET;
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static int unit = 0;
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struct Scsi_Host *host;
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struct ncr_device device;
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__raw_writel(CMD_RESET, zalon + IO_MODULE_IO_COMMAND);
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while (!(__raw_readl(zalon + IO_MODULE_IO_STATUS) & IOSTATUS_RY))
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cpu_relax();
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__raw_writel(IOIIDATA_MINT5EN | IOIIDATA_PACKEN | IOIIDATA_PREFETCHEN,
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zalon + IO_MODULE_II_CDATA);
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/* XXX: Save the Zalon version for bug workarounds? */
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zalon_vers = (__raw_readl(zalon + IO_MODULE_II_CDATA) >> 24) & 0x07;
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/* Setup the interrupts first.
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** Later on request_irq() will register the handler.
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*/
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dev->irq = gsc_alloc_irq(&gsc_irq);
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printk(KERN_INFO "%s: Zalon version %d, IRQ %d\n", __FUNCTION__,
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zalon_vers, dev->irq);
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__raw_writel(gsc_irq.txn_addr | gsc_irq.txn_data, zalon + IO_MODULE_EIM);
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if (zalon_vers == 0)
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printk(KERN_WARNING "%s: Zalon 1.1 or earlier\n", __FUNCTION__);
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memset(&device, 0, sizeof(struct ncr_device));
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/* The following three are needed before any other access. */
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__raw_writeb(0x20, io_port + 0x38); /* DCNTL_REG, EA */
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__raw_writeb(0x04, io_port + 0x1b); /* CTEST0_REG, EHP */
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__raw_writeb(0x80, io_port + 0x22); /* CTEST4_REG, MUX */
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/* Initialise ncr_device structure with items required by ncr_attach. */
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device.chip = zalon720_chip;
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device.host_id = 7;
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device.dev = &dev->dev;
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device.slot.base = dev->hpa.start + GSC_SCSI_ZALON_OFFSET;
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device.slot.base_v = io_port;
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device.slot.irq = dev->irq;
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device.differential = 2;
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host = ncr_attach(&zalon7xx_template, unit, &device);
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if (!host)
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goto fail;
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if (request_irq(dev->irq, ncr53c8xx_intr, SA_SHIRQ, "zalon", host)) {
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printk(KERN_ERR "%s: irq problem with %d, detaching\n ",
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dev->dev.bus_id, dev->irq);
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goto fail;
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}
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unit++;
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dev_set_drvdata(&dev->dev, host);
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error = scsi_add_host(host, &dev->dev);
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if (error)
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goto fail_free_irq;
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scsi_scan_host(host);
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return 0;
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fail_free_irq:
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free_irq(dev->irq, host);
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fail:
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ncr53c8xx_release(host);
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return error;
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}
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static struct parisc_device_id zalon_tbl[] = {
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{ HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00089 },
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{ 0, }
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};
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MODULE_DEVICE_TABLE(parisc, zalon_tbl);
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static int __exit zalon_remove(struct parisc_device *dev)
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{
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struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
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scsi_remove_host(host);
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ncr53c8xx_release(host);
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free_irq(dev->irq, host);
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return 0;
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}
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static struct parisc_driver zalon_driver = {
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.name = "zalon",
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.id_table = zalon_tbl,
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.probe = zalon_probe,
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.remove = __devexit_p(zalon_remove),
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};
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static int __init zalon7xx_init(void)
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{
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int ret = ncr53c8xx_init();
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if (!ret)
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ret = register_parisc_driver(&zalon_driver);
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if (ret)
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ncr53c8xx_exit();
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return ret;
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}
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static void __exit zalon7xx_exit(void)
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{
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unregister_parisc_driver(&zalon_driver);
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ncr53c8xx_exit();
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}
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module_init(zalon7xx_init);
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module_exit(zalon7xx_exit);
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