sim710.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * sim710.c - Copyright (C) 1999 Richard Hirst <richard@sleepie.demon.co.uk>
  4 *
  5 *----------------------------------------------------------------------------
  6 *----------------------------------------------------------------------------
  7 *
  8 * MCA card detection code by Trent McNair. (now deleted)
  9 * Fixes to not explicitly nul bss data from Xavier Bestel.
 10 * Some multiboard fixes from Rolf Eike Beer.
 11 * Auto probing of EISA config space from Trevor Hemsley.
 12 *
 13 * Rewritten to use 53c700.c by James.Bottomley@SteelEye.com
 14 */
 15
 16#include <linux/module.h>
 17#include <linux/slab.h>
 18
 19#include <linux/blkdev.h>
 20#include <linux/device.h>
 21#include <linux/init.h>
 22#include <linux/eisa.h>
 23#include <linux/interrupt.h>
 24#include <scsi/scsi_host.h>
 25#include <scsi/scsi_device.h>
 26#include <scsi/scsi_transport.h>
 27#include <scsi/scsi_transport_spi.h>
 28
 29#include "53c700.h"
 30
 31
 32/* Must be enough for EISA */
 33#define MAX_SLOTS 8
 34static __u8 __initdata id_array[MAX_SLOTS] = { [0 ... MAX_SLOTS-1] = 7 };
 35
 36static char *sim710;		/* command line passed by insmod */
 37
 38MODULE_AUTHOR("Richard Hirst");
 39MODULE_DESCRIPTION("Simple NCR53C710 driver");
 40MODULE_LICENSE("GPL");
 41
 42module_param(sim710, charp, 0);
 43
 44#ifdef MODULE
 45#define ARG_SEP ' '
 46#else
 47#define ARG_SEP ','
 48#endif
 49
 50static __init int
 51param_setup(char *str)
 52{
 53	char *pos = str, *next;
 54	int slot = -1;
 55
 56	while(pos != NULL && (next = strchr(pos, ':')) != NULL) {
 57		int val = (int)simple_strtoul(++next, NULL, 0);
 58
 59		if(!strncmp(pos, "slot:", 5))
 60			slot = val;
 61		else if(!strncmp(pos, "id:", 3)) {
 62			if(slot == -1) {
 63				printk(KERN_WARNING "sim710: Must specify slot for id parameter\n");
 64			} else if(slot >= MAX_SLOTS) {
 65				printk(KERN_WARNING "sim710: Illegal slot %d for id %d\n", slot, val);
 66			} else {
 67				id_array[slot] = val;
 68			}
 69		}
 70		if((pos = strchr(pos, ARG_SEP)) != NULL)
 71			pos++;
 72	}
 73	return 1;
 74}
 75__setup("sim710=", param_setup);
 76
 77static struct scsi_host_template sim710_driver_template = {
 78	.name			= "LSI (Symbios) 710 EISA",
 79	.proc_name		= "sim710",
 80	.this_id		= 7,
 81	.module			= THIS_MODULE,
 82};
 83
 84static int sim710_probe_common(struct device *dev, unsigned long base_addr,
 85			       int irq, int clock, int differential,
 86			       int scsi_id)
 87{
 88	struct Scsi_Host * host = NULL;
 89	struct NCR_700_Host_Parameters *hostdata =
 90		kzalloc(sizeof(struct NCR_700_Host_Parameters),	GFP_KERNEL);
 91
 92	printk(KERN_NOTICE "sim710: %s\n", dev_name(dev));
 93	printk(KERN_NOTICE "sim710: irq = %d, clock = %d, base = 0x%lx, scsi_id = %d\n",
 94	       irq, clock, base_addr, scsi_id);
 95
 96	if(hostdata == NULL) {
 97		printk(KERN_ERR "sim710: Failed to allocate host data\n");
 98		goto out;
 99	}
100
101	if(request_region(base_addr, 64, "sim710") == NULL) {
102		printk(KERN_ERR "sim710: Failed to reserve IO region 0x%lx\n",
103		       base_addr);
104		goto out_free;
105	}
106
107	/* Fill in the three required pieces of hostdata */
108	hostdata->base = ioport_map(base_addr, 64);
109	hostdata->differential = differential;
110	hostdata->clock = clock;
111	hostdata->chip710 = 1;
112	hostdata->burst_length = 8;
113
114	/* and register the chip */
115	if((host = NCR_700_detect(&sim710_driver_template, hostdata, dev))
116	   == NULL) {
117		printk(KERN_ERR "sim710: No host detected; card configuration problem?\n");
118		goto out_release;
119	}
120	host->this_id = scsi_id;
121	host->base = base_addr;
122	host->irq = irq;
123	if (request_irq(irq, NCR_700_intr, IRQF_SHARED, "sim710", host)) {
124		printk(KERN_ERR "sim710: request_irq failed\n");
125		goto out_put_host;
126	}
127
128	dev_set_drvdata(dev, host);
129	scsi_scan_host(host);
130
131	return 0;
132
133 out_put_host:
134	scsi_host_put(host);
135 out_release:
136	ioport_unmap(hostdata->base);
137	release_region(base_addr, 64);
138 out_free:
139	kfree(hostdata);
140 out:
141	return -ENODEV;
142}
143
144static int sim710_device_remove(struct device *dev)
145{
146	struct Scsi_Host *host = dev_get_drvdata(dev);
147	struct NCR_700_Host_Parameters *hostdata =
148		(struct NCR_700_Host_Parameters *)host->hostdata[0];
149
150	scsi_remove_host(host);
151	NCR_700_release(host);
152	ioport_unmap(hostdata->base);
153	kfree(hostdata);
154	free_irq(host->irq, host);
155	release_region(host->base, 64);
156	return 0;
157}
158
159#ifdef CONFIG_EISA
160static struct eisa_device_id sim710_eisa_ids[] = {
161	{ "CPQ4410" },
162	{ "CPQ4411" },
163	{ "HWP0C80" },
164	{ "" }
165};
166MODULE_DEVICE_TABLE(eisa, sim710_eisa_ids);
167
168static int sim710_eisa_probe(struct device *dev)
169{
170	struct eisa_device *edev = to_eisa_device(dev);
171	unsigned long io_addr = edev->base_addr;
172	char eisa_cpq_irqs[] = { 11, 14, 15, 10, 9, 0 };
173	char eisa_hwp_irqs[] = { 3, 4, 5, 7, 12, 10, 11, 0};
174	char *eisa_irqs;
175	unsigned char irq_index;
176	unsigned char irq, differential = 0, scsi_id = 7;
177
178	if(strcmp(edev->id.sig, "HWP0C80") == 0) {
179		__u8 val;
180		eisa_irqs =  eisa_hwp_irqs;
181		irq_index = (inb(io_addr + 0xc85) & 0x7) - 1;
182
183		val = inb(io_addr + 0x4);
184		scsi_id = ffs(val) - 1;
185
186		if(scsi_id > 7 || (val & ~(1<<scsi_id)) != 0) {
187			printk(KERN_ERR "sim710.c, EISA card %s has incorrect scsi_id, setting to 7\n", dev_name(dev));
188			scsi_id = 7;
189		}
190	} else {
191		eisa_irqs = eisa_cpq_irqs;
192		irq_index = inb(io_addr + 0xc88) & 0x07;
193	}
194
195	if(irq_index >= strlen(eisa_irqs)) {
196		printk("sim710.c: irq nasty\n");
197		return -ENODEV;
198	}
199
200	irq = eisa_irqs[irq_index];
201		
202	return sim710_probe_common(dev, io_addr, irq, 50,
203				   differential, scsi_id);
204}
205
206static struct eisa_driver sim710_eisa_driver = {
207	.id_table		= sim710_eisa_ids,
208	.driver = {
209		.name		= "sim710",
210		.probe		= sim710_eisa_probe,
211		.remove		= sim710_device_remove,
212	},
213};
214#endif /* CONFIG_EISA */
215
216static int __init sim710_init(void)
217{
218#ifdef MODULE
219	if (sim710)
220		param_setup(sim710);
221#endif
222
223#ifdef CONFIG_EISA
224	/*
225	 * FIXME: We'd really like to return -ENODEV if no devices have actually
226	 * been found.  However eisa_driver_register() only reports problems
227	 * with kobject_register() so simply return success for now.
228	 */
229	eisa_driver_register(&sim710_eisa_driver);
230#endif
231	return 0;
232}
233
234static void __exit sim710_exit(void)
235{
236#ifdef CONFIG_EISA
237	eisa_driver_unregister(&sim710_eisa_driver);
238#endif
239}
240
241module_init(sim710_init);
242module_exit(sim710_exit);