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_show_info oakscsi_show_info 35 #define NCR5380_write_info oakscsi_write_info 36 37 #define NCR5380_implementation_fields \ 38 void __iomem *base 39 40 #define BOARD_NORMAL 0 41 #define BOARD_NCR53C400 1 42 43 #include "../NCR5380.h" 44 45 #undef START_DMA_INITIATOR_RECEIVE_REG 46 #define START_DMA_INITIATOR_RECEIVE_REG (128 + 7) 47 48 const char * oakscsi_info (struct Scsi_Host *spnt) 49 { 50 return ""; 51 } 52 53 #define STAT ((128 + 16) << 2) 54 #define DATA ((128 + 8) << 2) 55 56 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *addr, 57 int len) 58 { 59 void __iomem *base = priv(instance)->base; 60 61 printk("writing %p len %d\n",addr, len); 62 if(!len) return -1; 63 64 while(1) 65 { 66 int status; 67 while (((status = readw(base + STAT)) & 0x100)==0); 68 } 69 } 70 71 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *addr, 72 int len) 73 { 74 void __iomem *base = priv(instance)->base; 75 printk("reading %p len %d\n", addr, len); 76 while(len > 0) 77 { 78 unsigned int status, timeout; 79 unsigned long b; 80 81 timeout = 0x01FFFFFF; 82 83 while (((status = readw(base + STAT)) & 0x100)==0) 84 { 85 timeout--; 86 if(status & 0x200 || !timeout) 87 { 88 printk("status = %08X\n", status); 89 return 1; 90 } 91 } 92 93 if(len >= 128) 94 { 95 readsw(base + DATA, addr, 128); 96 addr += 128; 97 len -= 128; 98 } 99 else 100 { 101 b = (unsigned long) readw(base + DATA); 102 *addr ++ = b; 103 len -= 1; 104 if(len) 105 *addr ++ = b>>8; 106 len -= 1; 107 } 108 } 109 return 0; 110 } 111 112 #undef STAT 113 #undef DATA 114 115 #include "../NCR5380.c" 116 117 static struct scsi_host_template oakscsi_template = { 118 .module = THIS_MODULE, 119 .show_info = oakscsi_show_info, 120 .write_info = oakscsi_write_info, 121 .name = "Oak 16-bit SCSI", 122 .info = oakscsi_info, 123 .queuecommand = oakscsi_queue_command, 124 .eh_abort_handler = NCR5380_abort, 125 .eh_bus_reset_handler = NCR5380_bus_reset, 126 .can_queue = 16, 127 .this_id = 7, 128 .sg_tablesize = SG_ALL, 129 .cmd_per_lun = 2, 130 .use_clustering = DISABLE_CLUSTERING, 131 .proc_name = "oakscsi", 132 }; 133 134 static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id) 135 { 136 struct Scsi_Host *host; 137 int ret = -ENOMEM; 138 139 ret = ecard_request_resources(ec); 140 if (ret) 141 goto out; 142 143 host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata)); 144 if (!host) { 145 ret = -ENOMEM; 146 goto release; 147 } 148 149 priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC), 150 ecard_resource_len(ec, ECARD_RES_MEMC)); 151 if (!priv(host)->base) { 152 ret = -ENOMEM; 153 goto unreg; 154 } 155 156 host->irq = IRQ_NONE; 157 host->n_io_port = 255; 158 159 NCR5380_init(host, 0); 160 161 printk("scsi%d: at port 0x%08lx irqs disabled", 162 host->host_no, host->io_port); 163 printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", 164 host->can_queue, host->cmd_per_lun, OAKSCSI_PUBLIC_RELEASE); 165 printk("\nscsi%d:", host->host_no); 166 NCR5380_print_options(host); 167 printk("\n"); 168 169 ret = scsi_add_host(host, &ec->dev); 170 if (ret) 171 goto out_unmap; 172 173 scsi_scan_host(host); 174 goto out; 175 176 out_unmap: 177 iounmap(priv(host)->base); 178 unreg: 179 scsi_host_put(host); 180 release: 181 ecard_release_resources(ec); 182 out: 183 return ret; 184 } 185 186 static void oakscsi_remove(struct expansion_card *ec) 187 { 188 struct Scsi_Host *host = ecard_get_drvdata(ec); 189 190 ecard_set_drvdata(ec, NULL); 191 scsi_remove_host(host); 192 193 NCR5380_exit(host); 194 iounmap(priv(host)->base); 195 scsi_host_put(host); 196 ecard_release_resources(ec); 197 } 198 199 static const struct ecard_id oakscsi_cids[] = { 200 { MANU_OAK, PROD_OAK_SCSI }, 201 { 0xffff, 0xffff } 202 }; 203 204 static struct ecard_driver oakscsi_driver = { 205 .probe = oakscsi_probe, 206 .remove = oakscsi_remove, 207 .id_table = oakscsi_cids, 208 .drv = { 209 .name = "oakscsi", 210 }, 211 }; 212 213 static int __init oakscsi_init(void) 214 { 215 return ecard_register_driver(&oakscsi_driver); 216 } 217 218 static void __exit oakscsi_exit(void) 219 { 220 ecard_remove_driver(&oakscsi_driver); 221 } 222 223 module_init(oakscsi_init); 224 module_exit(oakscsi_exit); 225 226 MODULE_AUTHOR("Russell King"); 227 MODULE_DESCRIPTION("Oak SCSI driver"); 228 MODULE_LICENSE("GPL"); 229 230