// 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", .cmd_size = sizeof(struct ncr_cmd_priv), }; 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 void __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); } 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);