1 /* 2 * sim710.c - Copyright (C) 1999 Richard Hirst <richard@sleepie.demon.co.uk> 3 * 4 *---------------------------------------------------------------------------- 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 *---------------------------------------------------------------------------- 19 * 20 * MCA card detection code by Trent McNair. (now deleted) 21 * Fixes to not explicitly nul bss data from Xavier Bestel. 22 * Some multiboard fixes from Rolf Eike Beer. 23 * Auto probing of EISA config space from Trevor Hemsley. 24 * 25 * Rewritten to use 53c700.c by James.Bottomley@SteelEye.com 26 * 27 */ 28 29 #include <linux/module.h> 30 #include <linux/slab.h> 31 32 #include <linux/blkdev.h> 33 #include <linux/device.h> 34 #include <linux/init.h> 35 #include <linux/eisa.h> 36 #include <linux/interrupt.h> 37 #include <scsi/scsi_host.h> 38 #include <scsi/scsi_device.h> 39 #include <scsi/scsi_transport.h> 40 #include <scsi/scsi_transport_spi.h> 41 42 #include "53c700.h" 43 44 45 /* Must be enough for EISA */ 46 #define MAX_SLOTS 8 47 static __u8 __initdata id_array[MAX_SLOTS] = { [0 ... MAX_SLOTS-1] = 7 }; 48 49 static char *sim710; /* command line passed by insmod */ 50 51 MODULE_AUTHOR("Richard Hirst"); 52 MODULE_DESCRIPTION("Simple NCR53C710 driver"); 53 MODULE_LICENSE("GPL"); 54 55 module_param(sim710, charp, 0); 56 57 #ifdef MODULE 58 #define ARG_SEP ' ' 59 #else 60 #define ARG_SEP ',' 61 #endif 62 63 static __init int 64 param_setup(char *str) 65 { 66 char *pos = str, *next; 67 int slot = -1; 68 69 while(pos != NULL && (next = strchr(pos, ':')) != NULL) { 70 int val = (int)simple_strtoul(++next, NULL, 0); 71 72 if(!strncmp(pos, "slot:", 5)) 73 slot = val; 74 else if(!strncmp(pos, "id:", 3)) { 75 if(slot == -1) { 76 printk(KERN_WARNING "sim710: Must specify slot for id parameter\n"); 77 } else if(slot >= MAX_SLOTS) { 78 printk(KERN_WARNING "sim710: Illegal slot %d for id %d\n", slot, val); 79 } else { 80 id_array[slot] = val; 81 } 82 } 83 if((pos = strchr(pos, ARG_SEP)) != NULL) 84 pos++; 85 } 86 return 1; 87 } 88 __setup("sim710=", param_setup); 89 90 static struct scsi_host_template sim710_driver_template = { 91 .name = "LSI (Symbios) 710 EISA", 92 .proc_name = "sim710", 93 .this_id = 7, 94 .module = THIS_MODULE, 95 }; 96 97 static int sim710_probe_common(struct device *dev, unsigned long base_addr, 98 int irq, int clock, int differential, 99 int scsi_id) 100 { 101 struct Scsi_Host * host = NULL; 102 struct NCR_700_Host_Parameters *hostdata = 103 kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL); 104 105 printk(KERN_NOTICE "sim710: %s\n", dev_name(dev)); 106 printk(KERN_NOTICE "sim710: irq = %d, clock = %d, base = 0x%lx, scsi_id = %d\n", 107 irq, clock, base_addr, scsi_id); 108 109 if(hostdata == NULL) { 110 printk(KERN_ERR "sim710: Failed to allocate host data\n"); 111 goto out; 112 } 113 114 if(request_region(base_addr, 64, "sim710") == NULL) { 115 printk(KERN_ERR "sim710: Failed to reserve IO region 0x%lx\n", 116 base_addr); 117 goto out_free; 118 } 119 120 /* Fill in the three required pieces of hostdata */ 121 hostdata->base = ioport_map(base_addr, 64); 122 hostdata->differential = differential; 123 hostdata->clock = clock; 124 hostdata->chip710 = 1; 125 hostdata->burst_length = 8; 126 127 /* and register the chip */ 128 if((host = NCR_700_detect(&sim710_driver_template, hostdata, dev)) 129 == NULL) { 130 printk(KERN_ERR "sim710: No host detected; card configuration problem?\n"); 131 goto out_release; 132 } 133 host->this_id = scsi_id; 134 host->base = base_addr; 135 host->irq = irq; 136 if (request_irq(irq, NCR_700_intr, IRQF_SHARED, "sim710", host)) { 137 printk(KERN_ERR "sim710: request_irq failed\n"); 138 goto out_put_host; 139 } 140 141 dev_set_drvdata(dev, host); 142 scsi_scan_host(host); 143 144 return 0; 145 146 out_put_host: 147 scsi_host_put(host); 148 out_release: 149 release_region(base_addr, 64); 150 out_free: 151 kfree(hostdata); 152 out: 153 return -ENODEV; 154 } 155 156 static int sim710_device_remove(struct device *dev) 157 { 158 struct Scsi_Host *host = dev_get_drvdata(dev); 159 struct NCR_700_Host_Parameters *hostdata = 160 (struct NCR_700_Host_Parameters *)host->hostdata[0]; 161 162 scsi_remove_host(host); 163 NCR_700_release(host); 164 kfree(hostdata); 165 free_irq(host->irq, host); 166 release_region(host->base, 64); 167 return 0; 168 } 169 170 #ifdef CONFIG_EISA 171 static struct eisa_device_id sim710_eisa_ids[] = { 172 { "CPQ4410" }, 173 { "CPQ4411" }, 174 { "HWP0C80" }, 175 { "" } 176 }; 177 MODULE_DEVICE_TABLE(eisa, sim710_eisa_ids); 178 179 static int sim710_eisa_probe(struct device *dev) 180 { 181 struct eisa_device *edev = to_eisa_device(dev); 182 unsigned long io_addr = edev->base_addr; 183 char eisa_cpq_irqs[] = { 11, 14, 15, 10, 9, 0 }; 184 char eisa_hwp_irqs[] = { 3, 4, 5, 7, 12, 10, 11, 0}; 185 char *eisa_irqs; 186 unsigned char irq_index; 187 unsigned char irq, differential = 0, scsi_id = 7; 188 189 if(strcmp(edev->id.sig, "HWP0C80") == 0) { 190 __u8 val; 191 eisa_irqs = eisa_hwp_irqs; 192 irq_index = (inb(io_addr + 0xc85) & 0x7) - 1; 193 194 val = inb(io_addr + 0x4); 195 scsi_id = ffs(val) - 1; 196 197 if(scsi_id > 7 || (val & ~(1<<scsi_id)) != 0) { 198 printk(KERN_ERR "sim710.c, EISA card %s has incorrect scsi_id, setting to 7\n", dev_name(dev)); 199 scsi_id = 7; 200 } 201 } else { 202 eisa_irqs = eisa_cpq_irqs; 203 irq_index = inb(io_addr + 0xc88) & 0x07; 204 } 205 206 if(irq_index >= strlen(eisa_irqs)) { 207 printk("sim710.c: irq nasty\n"); 208 return -ENODEV; 209 } 210 211 irq = eisa_irqs[irq_index]; 212 213 return sim710_probe_common(dev, io_addr, irq, 50, 214 differential, scsi_id); 215 } 216 217 static struct eisa_driver sim710_eisa_driver = { 218 .id_table = sim710_eisa_ids, 219 .driver = { 220 .name = "sim710", 221 .probe = sim710_eisa_probe, 222 .remove = sim710_device_remove, 223 }, 224 }; 225 #endif /* CONFIG_EISA */ 226 227 static int __init sim710_init(void) 228 { 229 int err = -ENODEV; 230 231 #ifdef MODULE 232 if (sim710) 233 param_setup(sim710); 234 #endif 235 236 #ifdef CONFIG_EISA 237 err = eisa_driver_register(&sim710_eisa_driver); 238 #endif 239 /* FIXME: what we'd really like to return here is -ENODEV if 240 * no devices have actually been found. Instead, the err 241 * above actually only reports problems with kobject_register, 242 * so for the moment return success */ 243 244 return 0; 245 } 246 247 static void __exit sim710_exit(void) 248 { 249 #ifdef CONFIG_EISA 250 eisa_driver_unregister(&sim710_eisa_driver); 251 #endif 252 } 253 254 module_init(sim710_init); 255 module_exit(sim710_exit); 256