1 /* 2 * Oak Generic NCR5380 driver 3 * 4 * Copyright 1995-2002, Russell King 5 */ 6 7 #include <linux/module.h> 8 #include <linux/signal.h> 9 #include <linux/ioport.h> 10 #include <linux/delay.h> 11 #include <linux/blkdev.h> 12 #include <linux/init.h> 13 14 #include <asm/ecard.h> 15 #include <asm/io.h> 16 17 #include "../scsi.h" 18 #include <scsi/scsi_host.h> 19 20 #define AUTOSENSE 21 /*#define PSEUDO_DMA*/ 22 23 #define OAKSCSI_PUBLIC_RELEASE 1 24 #define DONT_USE_INTR 25 26 #define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata) 27 #define NCR5380_local_declare() void __iomem *_base 28 #define NCR5380_setup(host) _base = priv(host)->base 29 30 #define NCR5380_read(reg) readb(_base + ((reg) << 2)) 31 #define NCR5380_write(reg, value) writeb(value, _base + ((reg) << 2)) 32 #define NCR5380_intr oakscsi_intr 33 #define NCR5380_queue_command oakscsi_queue_command 34 #define NCR5380_proc_info oakscsi_proc_info 35 36 #define NCR5380_implementation_fields \ 37 void __iomem *base 38 39 #define BOARD_NORMAL 0 40 #define BOARD_NCR53C400 1 41 42 #include "../NCR5380.h" 43 44 #undef START_DMA_INITIATOR_RECEIVE_REG 45 #define START_DMA_INITIATOR_RECEIVE_REG (128 + 7) 46 47 const char * oakscsi_info (struct Scsi_Host *spnt) 48 { 49 return ""; 50 } 51 52 #define STAT ((128 + 16) << 2) 53 #define DATA ((128 + 8) << 2) 54 55 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *addr, 56 int len) 57 { 58 void __iomem *base = priv(instance)->base; 59 60 printk("writing %p len %d\n",addr, len); 61 if(!len) return -1; 62 63 while(1) 64 { 65 int status; 66 while (((status = readw(base + STAT)) & 0x100)==0); 67 } 68 } 69 70 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *addr, 71 int len) 72 { 73 void __iomem *base = priv(instance)->base; 74 printk("reading %p len %d\n", addr, len); 75 while(len > 0) 76 { 77 unsigned int status, timeout; 78 unsigned long b; 79 80 timeout = 0x01FFFFFF; 81 82 while (((status = readw(base + STAT)) & 0x100)==0) 83 { 84 timeout--; 85 if(status & 0x200 || !timeout) 86 { 87 printk("status = %08X\n", status); 88 return 1; 89 } 90 } 91 92 if(len >= 128) 93 { 94 readsw(base + DATA, addr, 128); 95 addr += 128; 96 len -= 128; 97 } 98 else 99 { 100 b = (unsigned long) readw(base + DATA); 101 *addr ++ = b; 102 len -= 1; 103 if(len) 104 *addr ++ = b>>8; 105 len -= 1; 106 } 107 } 108 return 0; 109 } 110 111 #undef STAT 112 #undef DATA 113 114 #include "../NCR5380.c" 115 116 static struct scsi_host_template oakscsi_template = { 117 .module = THIS_MODULE, 118 .proc_info = oakscsi_proc_info, 119 .name = "Oak 16-bit SCSI", 120 .info = oakscsi_info, 121 .queuecommand = oakscsi_queue_command, 122 .eh_abort_handler = NCR5380_abort, 123 .eh_bus_reset_handler = NCR5380_bus_reset, 124 .can_queue = 16, 125 .this_id = 7, 126 .sg_tablesize = SG_ALL, 127 .cmd_per_lun = 2, 128 .use_clustering = DISABLE_CLUSTERING, 129 .proc_name = "oakscsi", 130 }; 131 132 static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id) 133 { 134 struct Scsi_Host *host; 135 int ret = -ENOMEM; 136 137 ret = ecard_request_resources(ec); 138 if (ret) 139 goto out; 140 141 host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata)); 142 if (!host) { 143 ret = -ENOMEM; 144 goto release; 145 } 146 147 priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC), 148 ecard_resource_len(ec, ECARD_RES_MEMC)); 149 if (!priv(host)->base) { 150 ret = -ENOMEM; 151 goto unreg; 152 } 153 154 host->irq = IRQ_NONE; 155 host->n_io_port = 255; 156 157 NCR5380_init(host, 0); 158 159 printk("scsi%d: at port 0x%08lx irqs disabled", 160 host->host_no, host->io_port); 161 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", 162 host->can_queue, host->cmd_per_lun, OAKSCSI_PUBLIC_RELEASE); 163 printk("\nscsi%d:", host->host_no); 164 NCR5380_print_options(host); 165 printk("\n"); 166 167 ret = scsi_add_host(host, &ec->dev); 168 if (ret) 169 goto out_unmap; 170 171 scsi_scan_host(host); 172 goto out; 173 174 out_unmap: 175 iounmap(priv(host)->base); 176 unreg: 177 scsi_host_put(host); 178 release: 179 ecard_release_resources(ec); 180 out: 181 return ret; 182 } 183 184 static void oakscsi_remove(struct expansion_card *ec) 185 { 186 struct Scsi_Host *host = ecard_get_drvdata(ec); 187 188 ecard_set_drvdata(ec, NULL); 189 scsi_remove_host(host); 190 191 NCR5380_exit(host); 192 iounmap(priv(host)->base); 193 scsi_host_put(host); 194 ecard_release_resources(ec); 195 } 196 197 static const struct ecard_id oakscsi_cids[] = { 198 { MANU_OAK, PROD_OAK_SCSI }, 199 { 0xffff, 0xffff } 200 }; 201 202 static struct ecard_driver oakscsi_driver = { 203 .probe = oakscsi_probe, 204 .remove = oakscsi_remove, 205 .id_table = oakscsi_cids, 206 .drv = { 207 .name = "oakscsi", 208 }, 209 }; 210 211 static int __init oakscsi_init(void) 212 { 213 return ecard_register_driver(&oakscsi_driver); 214 } 215 216 static void __exit oakscsi_exit(void) 217 { 218 ecard_remove_driver(&oakscsi_driver); 219 } 220 221 module_init(oakscsi_init); 222 module_exit(oakscsi_exit); 223 224 MODULE_AUTHOR("Russell King"); 225 MODULE_DESCRIPTION("Oak SCSI driver"); 226 MODULE_LICENSE("GPL"); 227 228