1 /* 2 * Oak Generic NCR5380 driver 3 * 4 * Copyright 1995-2002, Russell King 5 */ 6 7 #include <linux/module.h> 8 #include <linux/ioport.h> 9 #include <linux/blkdev.h> 10 #include <linux/init.h> 11 12 #include <asm/ecard.h> 13 #include <asm/io.h> 14 15 #include <scsi/scsi_host.h> 16 17 #define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata) 18 19 #define NCR5380_read(reg) readb(hostdata->io + ((reg) << 2)) 20 #define NCR5380_write(reg, value) writeb(value, hostdata->io + ((reg) << 2)) 21 22 #define NCR5380_dma_xfer_len NCR5380_dma_xfer_none 23 #define NCR5380_dma_recv_setup oakscsi_pread 24 #define NCR5380_dma_send_setup oakscsi_pwrite 25 #define NCR5380_dma_residual NCR5380_dma_residual_none 26 27 #define NCR5380_queue_command oakscsi_queue_command 28 #define NCR5380_info oakscsi_info 29 30 #define NCR5380_implementation_fields /* none */ 31 32 #include "../NCR5380.h" 33 34 #undef START_DMA_INITIATOR_RECEIVE_REG 35 #define START_DMA_INITIATOR_RECEIVE_REG (128 + 7) 36 37 #define STAT ((128 + 16) << 2) 38 #define DATA ((128 + 8) << 2) 39 40 static inline int oakscsi_pwrite(struct NCR5380_hostdata *hostdata, 41 unsigned char *addr, int len) 42 { 43 u8 __iomem *base = hostdata->io; 44 45 printk("writing %p len %d\n",addr, len); 46 47 while(1) 48 { 49 int status; 50 while (((status = readw(base + STAT)) & 0x100)==0); 51 } 52 return 0; 53 } 54 55 static inline int oakscsi_pread(struct NCR5380_hostdata *hostdata, 56 unsigned char *addr, int len) 57 { 58 u8 __iomem *base = hostdata->io; 59 60 printk("reading %p len %d\n", addr, len); 61 while(len > 0) 62 { 63 unsigned int status, timeout; 64 unsigned long b; 65 66 timeout = 0x01FFFFFF; 67 68 while (((status = readw(base + STAT)) & 0x100)==0) 69 { 70 timeout--; 71 if(status & 0x200 || !timeout) 72 { 73 printk("status = %08X\n", status); 74 return -1; 75 } 76 } 77 78 if(len >= 128) 79 { 80 readsw(base + DATA, addr, 128); 81 addr += 128; 82 len -= 128; 83 } 84 else 85 { 86 b = (unsigned long) readw(base + DATA); 87 *addr ++ = b; 88 len -= 1; 89 if(len) 90 *addr ++ = b>>8; 91 len -= 1; 92 } 93 } 94 return 0; 95 } 96 97 #undef STAT 98 #undef DATA 99 100 #include "../NCR5380.c" 101 102 static struct scsi_host_template oakscsi_template = { 103 .module = THIS_MODULE, 104 .name = "Oak 16-bit SCSI", 105 .info = oakscsi_info, 106 .queuecommand = oakscsi_queue_command, 107 .eh_abort_handler = NCR5380_abort, 108 .eh_host_reset_handler = NCR5380_host_reset, 109 .can_queue = 16, 110 .this_id = 7, 111 .sg_tablesize = SG_ALL, 112 .cmd_per_lun = 2, 113 .dma_boundary = PAGE_SIZE - 1, 114 .proc_name = "oakscsi", 115 .cmd_size = NCR5380_CMD_SIZE, 116 .max_sectors = 128, 117 }; 118 119 static int oakscsi_probe(struct expansion_card *ec, const struct ecard_id *id) 120 { 121 struct Scsi_Host *host; 122 int ret = -ENOMEM; 123 124 ret = ecard_request_resources(ec); 125 if (ret) 126 goto out; 127 128 host = scsi_host_alloc(&oakscsi_template, sizeof(struct NCR5380_hostdata)); 129 if (!host) { 130 ret = -ENOMEM; 131 goto release; 132 } 133 134 priv(host)->io = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC), 135 ecard_resource_len(ec, ECARD_RES_MEMC)); 136 if (!priv(host)->io) { 137 ret = -ENOMEM; 138 goto unreg; 139 } 140 141 host->irq = NO_IRQ; 142 143 ret = NCR5380_init(host, FLAG_DMA_FIXUP | FLAG_LATE_DMA_SETUP); 144 if (ret) 145 goto out_unmap; 146 147 NCR5380_maybe_reset_bus(host); 148 149 ret = scsi_add_host(host, &ec->dev); 150 if (ret) 151 goto out_exit; 152 153 scsi_scan_host(host); 154 goto out; 155 156 out_exit: 157 NCR5380_exit(host); 158 out_unmap: 159 iounmap(priv(host)->io); 160 unreg: 161 scsi_host_put(host); 162 release: 163 ecard_release_resources(ec); 164 out: 165 return ret; 166 } 167 168 static void oakscsi_remove(struct expansion_card *ec) 169 { 170 struct Scsi_Host *host = ecard_get_drvdata(ec); 171 void __iomem *base = priv(host)->io; 172 173 ecard_set_drvdata(ec, NULL); 174 scsi_remove_host(host); 175 176 NCR5380_exit(host); 177 scsi_host_put(host); 178 iounmap(base); 179 ecard_release_resources(ec); 180 } 181 182 static const struct ecard_id oakscsi_cids[] = { 183 { MANU_OAK, PROD_OAK_SCSI }, 184 { 0xffff, 0xffff } 185 }; 186 187 static struct ecard_driver oakscsi_driver = { 188 .probe = oakscsi_probe, 189 .remove = oakscsi_remove, 190 .id_table = oakscsi_cids, 191 .drv = { 192 .name = "oakscsi", 193 }, 194 }; 195 196 static int __init oakscsi_init(void) 197 { 198 return ecard_register_driver(&oakscsi_driver); 199 } 200 201 static void __exit oakscsi_exit(void) 202 { 203 ecard_remove_driver(&oakscsi_driver); 204 } 205 206 module_init(oakscsi_init); 207 module_exit(oakscsi_exit); 208 209 MODULE_AUTHOR("Russell King"); 210 MODULE_DESCRIPTION("Oak SCSI driver"); 211 MODULE_LICENSE("GPL"); 212 213