drivers/scsi/lasi700.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002
0003 /* PARISC LASI driver for the 53c700 chip
0004  *
0005  * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
0006 **-----------------------------------------------------------------------------
0007 **
0008 **
0009 **-----------------------------------------------------------------------------
0010  */
0011
0012 /*
0013  * Many thanks to Richard Hirst <rhirst@linuxcare.com> for patiently
0014  * debugging this driver on the parisc architecture and suggesting
0015  * many improvements and bug fixes.
0016  *
0017  * Thanks also go to Linuxcare Inc. for providing several PARISC
0018  * machines for me to debug the driver on.
0019  */
0020
0021 #include <linux/kernel.h>
0022 #include <linux/module.h>
0023 #include <linux/init.h>
0024 #include <linux/types.h>
0025 #include <linux/stat.h>
0026 #include <linux/mm.h>
0027 #include <linux/blkdev.h>
0028 #include <linux/ioport.h>
0029 #include <linux/dma-mapping.h>
0030 #include <linux/slab.h>
0031
0032 #include <asm/page.h>
0033 #include <asm/irq.h>
0034 #include <asm/hardware.h>
0035 #include <asm/parisc-device.h>
0036 #include <asm/delay.h>
0037
0038 #include <scsi/scsi_host.h>
0039 #include <scsi/scsi_device.h>
0040 #include <scsi/scsi_transport.h>
0041 #include <scsi/scsi_transport_spi.h>
0042
0043 #include "53c700.h"
0044
0045 MODULE_AUTHOR("James Bottomley");
0046 MODULE_DESCRIPTION("lasi700 SCSI Driver");
0047 MODULE_LICENSE("GPL");
0048
0049 #define LASI_700_SVERSION 0x00071
0050 #define LASI_710_SVERSION 0x00082
0051
0052 #define LASI700_ID_TABLE {          \
0053     .hw_type    = HPHW_FIO,     \
0054     .sversion   = LASI_700_SVERSION,    \
0055     .hversion   = HVERSION_ANY_ID,  \
0056     .hversion_rev   = HVERSION_REV_ANY_ID,  \
0057 }
0058
0059 #define LASI710_ID_TABLE {          \
0060     .hw_type    = HPHW_FIO,     \
0061     .sversion   = LASI_710_SVERSION,    \
0062     .hversion   = HVERSION_ANY_ID,  \
0063     .hversion_rev   = HVERSION_REV_ANY_ID,  \
0064 }
0065
0066 #define LASI700_CLOCK   25
0067 #define LASI710_CLOCK   40
0068 #define LASI_SCSI_CORE_OFFSET 0x100
0069
0070 static const struct parisc_device_id lasi700_ids[] __initconst = {
0071     LASI700_ID_TABLE,
0072     LASI710_ID_TABLE,
0073     { 0 }
0074 };
0075
0076 static struct scsi_host_template lasi700_template = {
0077     .name       = "LASI SCSI 53c700",
0078     .proc_name  = "lasi700",
0079     .this_id    = 7,
0080     .module     = THIS_MODULE,
0081 };
0082 MODULE_DEVICE_TABLE(parisc, lasi700_ids);
0083
0084 static int __init
0085 lasi700_probe(struct parisc_device *dev)
0086 {
0087     unsigned long base = dev->hpa.start + LASI_SCSI_CORE_OFFSET;
0088     struct NCR_700_Host_Parameters *hostdata;
0089     struct Scsi_Host *host;
0090
0091     hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
0092     if (!hostdata) {
0093         dev_printk(KERN_ERR, &dev->dev, "Failed to allocate host data\n");
0094         return -ENOMEM;
0095     }
0096
0097     hostdata->dev = &dev->dev;
0098     dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
0099     hostdata->base = ioremap(base, 0x100);
0100     hostdata->differential = 0;
0101
0102     if (dev->id.sversion == LASI_700_SVERSION) {
0103         hostdata->clock = LASI700_CLOCK;
0104         hostdata->force_le_on_be = 1;
0105     } else {
0106         hostdata->clock = LASI710_CLOCK;
0107         hostdata->force_le_on_be = 0;
0108         hostdata->chip710 = 1;
0109         hostdata->dmode_extra = DMODE_FC2;
0110         hostdata->burst_length = 8;
0111     }
0112
0113     host = NCR_700_detect(&lasi700_template, hostdata, &dev->dev);
0114     if (!host)
0115         goto out_kfree;
0116     host->this_id = 7;
0117     host->base = base;
0118     host->irq = dev->irq;
0119     if(request_irq(dev->irq, NCR_700_intr, IRQF_SHARED, "lasi700", host)) {
0120         printk(KERN_ERR "lasi700: request_irq failed!\n");
0121         goto out_put_host;
0122     }
0123
0124     dev_set_drvdata(&dev->dev, host);
0125     scsi_scan_host(host);
0126
0127     return 0;
0128
0129  out_put_host:
0130     scsi_host_put(host);
0131  out_kfree:
0132     iounmap(hostdata->base);
0133     kfree(hostdata);
0134     return -ENODEV;
0135 }
0136
0137 static void __exit
0138 lasi700_driver_remove(struct parisc_device *dev)
0139 {
0140     struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
0141     struct NCR_700_Host_Parameters *hostdata =
0142         (struct NCR_700_Host_Parameters *)host->hostdata[0];
0143
0144     scsi_remove_host(host);
0145     NCR_700_release(host);
0146     free_irq(host->irq, host);
0147     iounmap(hostdata->base);
0148     kfree(hostdata);
0149 }
0150
0151 static struct parisc_driver lasi700_driver __refdata = {
0152     .name =     "lasi_scsi",
0153     .id_table = lasi700_ids,
0154     .probe =    lasi700_probe,
0155     .remove =   __exit_p(lasi700_driver_remove),
0156 };
0157
0158 static int __init
0159 lasi700_init(void)
0160 {
0161     return register_parisc_driver(&lasi700_driver);
0162 }
0163
0164 static void __exit
0165 lasi700_exit(void)
0166 {
0167     unregister_parisc_driver(&lasi700_driver);
0168 }
0169
0170 module_init(lasi700_init);
0171 module_exit(lasi700_exit);