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/scsi_host.h> 18 19 /*#define PSEUDO_DMA*/ 20 #define DONT_USE_INTR 21 22 #define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata) 23 #define NCR5380_local_declare() void __iomem *_base 24 #define NCR5380_setup(host) _base = priv(host)->base 25 26 #define NCR5380_read(reg) readb(_base + ((reg) << 2)) 27 #define NCR5380_write(reg, value) writeb(value, _base + ((reg) << 2)) 28 #define NCR5380_queue_command oakscsi_queue_command 29 #define NCR5380_info oakscsi_info 30 #define NCR5380_show_info oakscsi_show_info 31 32 #define NCR5380_implementation_fields \ 33 void __iomem *base 34 35 #include "../NCR5380.h" 36 37 #undef START_DMA_INITIATOR_RECEIVE_REG 38 #define START_DMA_INITIATOR_RECEIVE_REG (128 + 7) 39 40 #define STAT ((128 + 16) << 2) 41 #define DATA ((128 + 8) << 2) 42 43 static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *addr, 44 int len) 45 { 46 void __iomem *base = priv(instance)->base; 47 48 printk("writing %p len %d\n",addr, len); 49 if(!len) return -1; 50 51 while(1) 52 { 53 int status; 54 while (((status = readw(base + STAT)) & 0x100)==0); 55 } 56 } 57 58 static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *addr, 59 int len) 60 { 61 void __iomem *base = priv(instance)->base; 62 printk("reading %p len %d\n", addr, len); 63 while(len > 0) 64 { 65 unsigned int status, timeout; 66 unsigned long b; 67 68 timeout = 0x01FFFFFF; 69 70 while (((status = readw(base + STAT)) & 0x100)==0) 71 { 72 timeout--; 73 if(status & 0x200 || !timeout) 74 { 75 printk("status = %08X\n", status); 76 return 1; 77 } 78 } 79 80 if(len >= 128) 81 { 82 readsw(base + DATA, addr, 128); 83 addr += 128; 84 len -= 128; 85 } 86 else 87 { 88 b = (unsigned long) readw(base + DATA); 89 *addr ++ = b; 90 len -= 1; 91 if(len) 92 *addr ++ = b>>8; 93 len -= 1; 94 } 95 } 96 return 0; 97 } 98 99 #undef STAT 100 #undef DATA 101 102 #include "../NCR5380.c" 103 104 static struct scsi_host_template oakscsi_template = { 105 .module = THIS_MODULE, 106 .show_info = oakscsi_show_info, 107 .name = "Oak 16-bit SCSI", 108 .info = oakscsi_info, 109 .queuecommand = oakscsi_queue_command, 110 .eh_abort_handler = NCR5380_abort, 111 .eh_bus_reset_handler = NCR5380_bus_reset, 112 .can_queue = 16, 113 .this_id = 7, 114 .sg_tablesize = SG_ALL, 115 .cmd_per_lun = 2, 116 .use_clustering = DISABLE_CLUSTERING, 117 .proc_name = "oakscsi", 118 }; 119 120 static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id) 121 { 122 struct Scsi_Host *host; 123 int ret = -ENOMEM; 124 125 ret = ecard_request_resources(ec); 126 if (ret) 127 goto out; 128 129 host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata)); 130 if (!host) { 131 ret = -ENOMEM; 132 goto release; 133 } 134 135 priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC), 136 ecard_resource_len(ec, ECARD_RES_MEMC)); 137 if (!priv(host)->base) { 138 ret = -ENOMEM; 139 goto unreg; 140 } 141 142 host->irq = NO_IRQ; 143 host->n_io_port = 255; 144 145 NCR5380_init(host, 0); 146 147 ret = scsi_add_host(host, &ec->dev); 148 if (ret) 149 goto out_unmap; 150 151 scsi_scan_host(host); 152 goto out; 153 154 out_unmap: 155 iounmap(priv(host)->base); 156 unreg: 157 scsi_host_put(host); 158 release: 159 ecard_release_resources(ec); 160 out: 161 return ret; 162 } 163 164 static void oakscsi_remove(struct expansion_card *ec) 165 { 166 struct Scsi_Host *host = ecard_get_drvdata(ec); 167 168 ecard_set_drvdata(ec, NULL); 169 scsi_remove_host(host); 170 171 NCR5380_exit(host); 172 iounmap(priv(host)->base); 173 scsi_host_put(host); 174 ecard_release_resources(ec); 175 } 176 177 static const struct ecard_id oakscsi_cids[] = { 178 { MANU_OAK, PROD_OAK_SCSI }, 179 { 0xffff, 0xffff } 180 }; 181 182 static struct ecard_driver oakscsi_driver = { 183 .probe = oakscsi_probe, 184 .remove = oakscsi_remove, 185 .id_table = oakscsi_cids, 186 .drv = { 187 .name = "oakscsi", 188 }, 189 }; 190 191 static int __init oakscsi_init(void) 192 { 193 return ecard_register_driver(&oakscsi_driver); 194 } 195 196 static void __exit oakscsi_exit(void) 197 { 198 ecard_remove_driver(&oakscsi_driver); 199 } 200 201 module_init(oakscsi_init); 202 module_exit(oakscsi_exit); 203 204 MODULE_AUTHOR("Russell King"); 205 MODULE_DESCRIPTION("Oak SCSI driver"); 206 MODULE_LICENSE("GPL"); 207 208