diff options
Diffstat (limited to 'drivers/scsi/zalon.c')
| -rw-r--r-- | drivers/scsi/zalon.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/drivers/scsi/zalon.c b/drivers/scsi/zalon.c new file mode 100644 index 000000000..7eac76ccc --- /dev/null +++ b/drivers/scsi/zalon.c @@ -0,0 +1,206 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Zalon 53c7xx device driver. + * By Richard Hirst (rhirst@linuxcare.com) + */ + +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/types.h> +#include <asm/hardware.h> +#include <asm/io.h> + +#include "../parisc/gsc.h" + +#include "ncr53c8xx.h" + +MODULE_AUTHOR("Richard Hirst"); +MODULE_DESCRIPTION("Bluefish/Zalon 720 SCSI Driver"); +MODULE_LICENSE("GPL"); + +#define GSC_SCSI_ZALON_OFFSET 0x800 + +#define IO_MODULE_EIM (1*4) +#define IO_MODULE_DC_ADATA (2*4) +#define IO_MODULE_II_CDATA (3*4) +#define IO_MODULE_IO_COMMAND (12*4) +#define IO_MODULE_IO_STATUS (13*4) + +#define IOSTATUS_RY 0x40 +#define IOSTATUS_FE 0x80 +#define IOIIDATA_SMINT5L 0x40000000 +#define IOIIDATA_MINT5EN 0x20000000 +#define IOIIDATA_PACKEN 0x10000000 +#define IOIIDATA_PREFETCHEN 0x08000000 +#define IOIIDATA_IOII 0x00000020 + +#define CMD_RESET 5 + +static struct ncr_chip zalon720_chip __initdata = { + .revision_id = 0x0f, + .burst_max = 3, + .offset_max = 8, + .nr_divisor = 4, + .features = FE_WIDE | FE_DIFF | FE_EHP| FE_MUX | FE_EA, +}; + + + +#if 0 +/* FIXME: + * Is this function dead code? or is someone planning on using it in the + * future. The clock = (int) pdc_result[16] does not look correct to + * me ... I think it should be iodc_data[16]. Since this cause a compile + * error with the new encapsulated PDC, I'm not compiling in this function. + * - RB + */ +/* poke SCSI clock out of iodc data */ + +static u8 iodc_data[32] __attribute__ ((aligned (64))); +static unsigned long pdc_result[32] __attribute__ ((aligned (16))) ={0,0,0,0}; + +static int +lasi_scsi_clock(void * hpa, int defaultclock) +{ + int clock, status; + + status = pdc_iodc_read(&pdc_result, hpa, 0, &iodc_data, 32 ); + if (status == PDC_RET_OK) { + clock = (int) pdc_result[16]; + } else { + printk(KERN_WARNING "%s: pdc_iodc_read returned %d\n", __func__, status); + clock = defaultclock; + } + + printk(KERN_DEBUG "%s: SCSI clock %d\n", __func__, clock); + return clock; +} +#endif + +static struct scsi_host_template zalon7xx_template = { + .module = THIS_MODULE, + .proc_name = "zalon7xx", +}; + +static int __init +zalon_probe(struct parisc_device *dev) +{ + struct gsc_irq gsc_irq; + u32 zalon_vers; + int error = -ENODEV; + void __iomem *zalon = ioremap(dev->hpa.start, 4096); + void __iomem *io_port = zalon + GSC_SCSI_ZALON_OFFSET; + static int unit = 0; + struct Scsi_Host *host; + struct ncr_device device; + + __raw_writel(CMD_RESET, zalon + IO_MODULE_IO_COMMAND); + while (!(__raw_readl(zalon + IO_MODULE_IO_STATUS) & IOSTATUS_RY)) + cpu_relax(); + __raw_writel(IOIIDATA_MINT5EN | IOIIDATA_PACKEN | IOIIDATA_PREFETCHEN, + zalon + IO_MODULE_II_CDATA); + + /* XXX: Save the Zalon version for bug workarounds? */ + zalon_vers = (__raw_readl(zalon + IO_MODULE_II_CDATA) >> 24) & 0x07; + + /* Setup the interrupts first. + ** Later on request_irq() will register the handler. + */ + dev->irq = gsc_alloc_irq(&gsc_irq); + + printk(KERN_INFO "%s: Zalon version %d, IRQ %d\n", __func__, + zalon_vers, dev->irq); + + __raw_writel(gsc_irq.txn_addr | gsc_irq.txn_data, zalon + IO_MODULE_EIM); + + if (zalon_vers == 0) + printk(KERN_WARNING "%s: Zalon 1.1 or earlier\n", __func__); + + memset(&device, 0, sizeof(struct ncr_device)); + + /* The following three are needed before any other access. */ + __raw_writeb(0x20, io_port + 0x38); /* DCNTL_REG, EA */ + __raw_writeb(0x04, io_port + 0x1b); /* CTEST0_REG, EHP */ + __raw_writeb(0x80, io_port + 0x22); /* CTEST4_REG, MUX */ + + /* Initialise ncr_device structure with items required by ncr_attach. */ + device.chip = zalon720_chip; + device.host_id = 7; + device.dev = &dev->dev; + device.slot.base = dev->hpa.start + GSC_SCSI_ZALON_OFFSET; + device.slot.base_v = io_port; + device.slot.irq = dev->irq; + device.differential = 2; + + host = ncr_attach(&zalon7xx_template, unit, &device); + if (!host) + return -ENODEV; + + if (request_irq(dev->irq, ncr53c8xx_intr, IRQF_SHARED, "zalon", host)) { + dev_printk(KERN_ERR, &dev->dev, "irq problem with %d, detaching\n ", + dev->irq); + goto fail; + } + + unit++; + + dev_set_drvdata(&dev->dev, host); + + error = scsi_add_host(host, &dev->dev); + if (error) + goto fail_free_irq; + + scsi_scan_host(host); + return 0; + + fail_free_irq: + free_irq(dev->irq, host); + fail: + ncr53c8xx_release(host); + return error; +} + +static const struct parisc_device_id zalon_tbl[] __initconst = { + { HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00089 }, + { 0, } +}; + +MODULE_DEVICE_TABLE(parisc, zalon_tbl); + +static int __exit zalon_remove(struct parisc_device *dev) +{ + struct Scsi_Host *host = dev_get_drvdata(&dev->dev); + + scsi_remove_host(host); + ncr53c8xx_release(host); + free_irq(dev->irq, host); + + return 0; +} + +static struct parisc_driver zalon_driver __refdata = { + .name = "zalon", + .id_table = zalon_tbl, + .probe = zalon_probe, + .remove = __exit_p(zalon_remove), +}; + +static int __init zalon7xx_init(void) +{ + int ret = ncr53c8xx_init(); + if (!ret) + ret = register_parisc_driver(&zalon_driver); + if (ret) + ncr53c8xx_exit(); + return ret; +} + +static void __exit zalon7xx_exit(void) +{ + unregister_parisc_driver(&zalon_driver); + ncr53c8xx_exit(); +} + +module_init(zalon7xx_init); +module_exit(zalon7xx_exit); |