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Linux/drivers/scsi/lasi700.c

  1 /* -*- mode: c; c-basic-offset: 8 -*- */
  2 
  3 /* PARISC LASI driver for the 53c700 chip
  4  *
  5  * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
  6 **-----------------------------------------------------------------------------
  7 **  
  8 **  This program is free software; you can redistribute it and/or modify
  9 **  it under the terms of the GNU General Public License as published by
 10 **  the Free Software Foundation; either version 2 of the License, or
 11 **  (at your option) any later version.
 12 **
 13 **  This program is distributed in the hope that it will be useful,
 14 **  but WITHOUT ANY WARRANTY; without even the implied warranty of
 15 **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 16 **  GNU General Public License for more details.
 17 **
 18 **  You should have received a copy of the GNU General Public License
 19 **  along with this program; if not, write to the Free Software
 20 **  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 21 **
 22 **-----------------------------------------------------------------------------
 23  */
 24 
 25 /*
 26  * Many thanks to Richard Hirst <rhirst@linuxcare.com> for patiently
 27  * debugging this driver on the parisc architecture and suggesting
 28  * many improvements and bug fixes.
 29  *
 30  * Thanks also go to Linuxcare Inc. for providing several PARISC
 31  * machines for me to debug the driver on.
 32  */
 33 
 34 #include <linux/kernel.h>
 35 #include <linux/module.h>
 36 #include <linux/init.h>
 37 #include <linux/types.h>
 38 #include <linux/stat.h>
 39 #include <linux/mm.h>
 40 #include <linux/blkdev.h>
 41 #include <linux/ioport.h>
 42 #include <linux/dma-mapping.h>
 43 #include <linux/slab.h>
 44 
 45 #include <asm/page.h>
 46 #include <asm/pgtable.h>
 47 #include <asm/irq.h>
 48 #include <asm/hardware.h>
 49 #include <asm/parisc-device.h>
 50 #include <asm/delay.h>
 51 
 52 #include <scsi/scsi_host.h>
 53 #include <scsi/scsi_device.h>
 54 #include <scsi/scsi_transport.h>
 55 #include <scsi/scsi_transport_spi.h>
 56 
 57 #include "53c700.h"
 58 
 59 MODULE_AUTHOR("James Bottomley");
 60 MODULE_DESCRIPTION("lasi700 SCSI Driver");
 61 MODULE_LICENSE("GPL");
 62 
 63 #define LASI_700_SVERSION 0x00071
 64 #define LASI_710_SVERSION 0x00082
 65 
 66 #define LASI700_ID_TABLE {                      \
 67         .hw_type        = HPHW_FIO,             \
 68         .sversion       = LASI_700_SVERSION,    \
 69         .hversion       = HVERSION_ANY_ID,      \
 70         .hversion_rev   = HVERSION_REV_ANY_ID,  \
 71 }
 72 
 73 #define LASI710_ID_TABLE {                      \
 74         .hw_type        = HPHW_FIO,             \
 75         .sversion       = LASI_710_SVERSION,    \
 76         .hversion       = HVERSION_ANY_ID,      \
 77         .hversion_rev   = HVERSION_REV_ANY_ID,  \
 78 }
 79 
 80 #define LASI700_CLOCK   25
 81 #define LASI710_CLOCK   40
 82 #define LASI_SCSI_CORE_OFFSET 0x100
 83 
 84 static struct parisc_device_id lasi700_ids[] = {
 85         LASI700_ID_TABLE,
 86         LASI710_ID_TABLE,
 87         { 0 }
 88 };
 89 
 90 static struct scsi_host_template lasi700_template = {
 91         .name           = "LASI SCSI 53c700",
 92         .proc_name      = "lasi700",
 93         .this_id        = 7,
 94         .module         = THIS_MODULE,
 95 };
 96 MODULE_DEVICE_TABLE(parisc, lasi700_ids);
 97 
 98 static int __init
 99 lasi700_probe(struct parisc_device *dev)
100 {
101         unsigned long base = dev->hpa.start + LASI_SCSI_CORE_OFFSET;
102         struct NCR_700_Host_Parameters *hostdata;
103         struct Scsi_Host *host;
104 
105         hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
106         if (!hostdata) {
107                 dev_printk(KERN_ERR, &dev->dev, "Failed to allocate host data\n");
108                 return -ENOMEM;
109         }
110 
111         hostdata->dev = &dev->dev;
112         dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
113         hostdata->base = ioremap_nocache(base, 0x100);
114         hostdata->differential = 0;
115 
116         if (dev->id.sversion == LASI_700_SVERSION) {
117                 hostdata->clock = LASI700_CLOCK;
118                 hostdata->force_le_on_be = 1;
119         } else {
120                 hostdata->clock = LASI710_CLOCK;
121                 hostdata->force_le_on_be = 0;
122                 hostdata->chip710 = 1;
123                 hostdata->dmode_extra = DMODE_FC2;
124                 hostdata->burst_length = 8;
125         }
126 
127         host = NCR_700_detect(&lasi700_template, hostdata, &dev->dev);
128         if (!host)
129                 goto out_kfree;
130         host->this_id = 7;
131         host->base = base;
132         host->irq = dev->irq;
133         if(request_irq(dev->irq, NCR_700_intr, IRQF_SHARED, "lasi700", host)) {
134                 printk(KERN_ERR "lasi700: request_irq failed!\n");
135                 goto out_put_host;
136         }
137 
138         dev_set_drvdata(&dev->dev, host);
139         scsi_scan_host(host);
140 
141         return 0;
142 
143  out_put_host:
144         scsi_host_put(host);
145  out_kfree:
146         iounmap(hostdata->base);
147         kfree(hostdata);
148         return -ENODEV;
149 }
150 
151 static int __exit
152 lasi700_driver_remove(struct parisc_device *dev)
153 {
154         struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
155         struct NCR_700_Host_Parameters *hostdata = 
156                 (struct NCR_700_Host_Parameters *)host->hostdata[0];
157 
158         scsi_remove_host(host);
159         NCR_700_release(host);
160         free_irq(host->irq, host);
161         iounmap(hostdata->base);
162         kfree(hostdata);
163 
164         return 0;
165 }
166 
167 static struct parisc_driver lasi700_driver = {
168         .name =         "lasi_scsi",
169         .id_table =     lasi700_ids,
170         .probe =        lasi700_probe,
171         .remove =       lasi700_driver_remove,
172 };
173 
174 static int __init
175 lasi700_init(void)
176 {
177         return register_parisc_driver(&lasi700_driver);
178 }
179 
180 static void __exit
181 lasi700_exit(void)
182 {
183         unregister_parisc_driver(&lasi700_driver);
184 }
185 
186 module_init(lasi700_init);
187 module_exit(lasi700_exit);
188 

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