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1// SPDX-License-Identifier: GPL-2.0-or-later2/*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.com14 */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 834static __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 MODULE45#define ARG_SEP ' '46#else47#define ARG_SEP ','48#endif49 50static __init int51param_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 release_region(base_addr, 64);137 out_free:138 kfree(hostdata);139 out:140 return -ENODEV;141}142 143static int sim710_device_remove(struct device *dev)144{145 struct Scsi_Host *host = dev_get_drvdata(dev);146 struct NCR_700_Host_Parameters *hostdata =147 (struct NCR_700_Host_Parameters *)host->hostdata[0];148 149 scsi_remove_host(host);150 NCR_700_release(host);151 kfree(hostdata);152 free_irq(host->irq, host);153 release_region(host->base, 64);154 return 0;155}156 157#ifdef CONFIG_EISA158static struct eisa_device_id sim710_eisa_ids[] = {159 { "CPQ4410" },160 { "CPQ4411" },161 { "HWP0C80" },162 { "" }163};164MODULE_DEVICE_TABLE(eisa, sim710_eisa_ids);165 166static int sim710_eisa_probe(struct device *dev)167{168 struct eisa_device *edev = to_eisa_device(dev);169 unsigned long io_addr = edev->base_addr;170 char eisa_cpq_irqs[] = { 11, 14, 15, 10, 9, 0 };171 char eisa_hwp_irqs[] = { 3, 4, 5, 7, 12, 10, 11, 0};172 char *eisa_irqs;173 unsigned char irq_index;174 unsigned char irq, differential = 0, scsi_id = 7;175 176 if(strcmp(edev->id.sig, "HWP0C80") == 0) {177 __u8 val;178 eisa_irqs = eisa_hwp_irqs;179 irq_index = (inb(io_addr + 0xc85) & 0x7) - 1;180 181 val = inb(io_addr + 0x4);182 scsi_id = ffs(val) - 1;183 184 if(scsi_id > 7 || (val & ~(1<<scsi_id)) != 0) {185 printk(KERN_ERR "sim710.c, EISA card %s has incorrect scsi_id, setting to 7\n", dev_name(dev));186 scsi_id = 7;187 }188 } else {189 eisa_irqs = eisa_cpq_irqs;190 irq_index = inb(io_addr + 0xc88) & 0x07;191 }192 193 if(irq_index >= strlen(eisa_irqs)) {194 printk("sim710.c: irq nasty\n");195 return -ENODEV;196 }197 198 irq = eisa_irqs[irq_index];199 200 return sim710_probe_common(dev, io_addr, irq, 50,201 differential, scsi_id);202}203 204static struct eisa_driver sim710_eisa_driver = {205 .id_table = sim710_eisa_ids,206 .driver = {207 .name = "sim710",208 .probe = sim710_eisa_probe,209 .remove = sim710_device_remove,210 },211};212#endif /* CONFIG_EISA */213 214static int __init sim710_init(void)215{216#ifdef MODULE217 if (sim710)218 param_setup(sim710);219#endif220 221#ifdef CONFIG_EISA222 /*223 * FIXME: We'd really like to return -ENODEV if no devices have actually224 * been found. However eisa_driver_register() only reports problems225 * with kobject_register() so simply return success for now.226 */227 eisa_driver_register(&sim710_eisa_driver);228#endif229 return 0;230}231 232static void __exit sim710_exit(void)233{234#ifdef CONFIG_EISA235 eisa_driver_unregister(&sim710_eisa_driver);236#endif237}238 239module_init(sim710_init);240module_exit(sim710_exit);241