1 #include <linux/types.h> 2 #include <linux/init.h> 3 #include <linux/interrupt.h> 4 #include <linux/mm.h> 5 #include <linux/slab.h> 6 #include <linux/spinlock.h> 7 #include <linux/zorro.h> 8 #include <linux/module.h> 9 10 #include <asm/page.h> 11 #include <asm/pgtable.h> 12 #include <asm/amigaints.h> 13 #include <asm/amigahw.h> 14 15 #include "scsi.h" 16 #include "wd33c93.h" 17 #include "gvp11.h" 18 19 20 #define CHECK_WD33C93 21 22 struct gvp11_hostdata { 23 struct WD33C93_hostdata wh; 24 struct gvp11_scsiregs *regs; 25 }; 26 27 static irqreturn_t gvp11_intr(int irq, void *data) 28 { 29 struct Scsi_Host *instance = data; 30 struct gvp11_hostdata *hdata = shost_priv(instance); 31 unsigned int status = hdata->regs->CNTR; 32 unsigned long flags; 33 34 if (!(status & GVP11_DMAC_INT_PENDING)) 35 return IRQ_NONE; 36 37 spin_lock_irqsave(instance->host_lock, flags); 38 wd33c93_intr(instance); 39 spin_unlock_irqrestore(instance->host_lock, flags); 40 return IRQ_HANDLED; 41 } 42 43 static int gvp11_xfer_mask = 0; 44 45 void gvp11_setup(char *str, int *ints) 46 { 47 gvp11_xfer_mask = ints[1]; 48 } 49 50 static int dma_setup(struct scsi_cmnd *cmd, int dir_in) 51 { 52 struct Scsi_Host *instance = cmd->device->host; 53 struct gvp11_hostdata *hdata = shost_priv(instance); 54 struct WD33C93_hostdata *wh = &hdata->wh; 55 struct gvp11_scsiregs *regs = hdata->regs; 56 unsigned short cntr = GVP11_DMAC_INT_ENABLE; 57 unsigned long addr = virt_to_bus(cmd->SCp.ptr); 58 int bank_mask; 59 static int scsi_alloc_out_of_range = 0; 60 61 /* use bounce buffer if the physical address is bad */ 62 if (addr & wh->dma_xfer_mask) { 63 wh->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff; 64 65 if (!scsi_alloc_out_of_range) { 66 wh->dma_bounce_buffer = 67 kmalloc(wh->dma_bounce_len, GFP_KERNEL); 68 wh->dma_buffer_pool = BUF_SCSI_ALLOCED; 69 } 70 71 if (scsi_alloc_out_of_range || 72 !wh->dma_bounce_buffer) { 73 wh->dma_bounce_buffer = 74 amiga_chip_alloc(wh->dma_bounce_len, 75 "GVP II SCSI Bounce Buffer"); 76 77 if (!wh->dma_bounce_buffer) { 78 wh->dma_bounce_len = 0; 79 return 1; 80 } 81 82 wh->dma_buffer_pool = BUF_CHIP_ALLOCED; 83 } 84 85 /* check if the address of the bounce buffer is OK */ 86 addr = virt_to_bus(wh->dma_bounce_buffer); 87 88 if (addr & wh->dma_xfer_mask) { 89 /* fall back to Chip RAM if address out of range */ 90 if (wh->dma_buffer_pool == BUF_SCSI_ALLOCED) { 91 kfree(wh->dma_bounce_buffer); 92 scsi_alloc_out_of_range = 1; 93 } else { 94 amiga_chip_free(wh->dma_bounce_buffer); 95 } 96 97 wh->dma_bounce_buffer = 98 amiga_chip_alloc(wh->dma_bounce_len, 99 "GVP II SCSI Bounce Buffer"); 100 101 if (!wh->dma_bounce_buffer) { 102 wh->dma_bounce_len = 0; 103 return 1; 104 } 105 106 addr = virt_to_bus(wh->dma_bounce_buffer); 107 wh->dma_buffer_pool = BUF_CHIP_ALLOCED; 108 } 109 110 if (!dir_in) { 111 /* copy to bounce buffer for a write */ 112 memcpy(wh->dma_bounce_buffer, cmd->SCp.ptr, 113 cmd->SCp.this_residual); 114 } 115 } 116 117 /* setup dma direction */ 118 if (!dir_in) 119 cntr |= GVP11_DMAC_DIR_WRITE; 120 121 wh->dma_dir = dir_in; 122 regs->CNTR = cntr; 123 124 /* setup DMA *physical* address */ 125 regs->ACR = addr; 126 127 if (dir_in) { 128 /* invalidate any cache */ 129 cache_clear(addr, cmd->SCp.this_residual); 130 } else { 131 /* push any dirty cache */ 132 cache_push(addr, cmd->SCp.this_residual); 133 } 134 135 bank_mask = (~wh->dma_xfer_mask >> 18) & 0x01c0; 136 if (bank_mask) 137 regs->BANK = bank_mask & (addr >> 18); 138 139 /* start DMA */ 140 regs->ST_DMA = 1; 141 142 /* return success */ 143 return 0; 144 } 145 146 static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt, 147 int status) 148 { 149 struct gvp11_hostdata *hdata = shost_priv(instance); 150 struct WD33C93_hostdata *wh = &hdata->wh; 151 struct gvp11_scsiregs *regs = hdata->regs; 152 153 /* stop DMA */ 154 regs->SP_DMA = 1; 155 /* remove write bit from CONTROL bits */ 156 regs->CNTR = GVP11_DMAC_INT_ENABLE; 157 158 /* copy from a bounce buffer, if necessary */ 159 if (status && wh->dma_bounce_buffer) { 160 if (wh->dma_dir && SCpnt) 161 memcpy(SCpnt->SCp.ptr, wh->dma_bounce_buffer, 162 SCpnt->SCp.this_residual); 163 164 if (wh->dma_buffer_pool == BUF_SCSI_ALLOCED) 165 kfree(wh->dma_bounce_buffer); 166 else 167 amiga_chip_free(wh->dma_bounce_buffer); 168 169 wh->dma_bounce_buffer = NULL; 170 wh->dma_bounce_len = 0; 171 } 172 } 173 174 static int gvp11_bus_reset(struct scsi_cmnd *cmd) 175 { 176 struct Scsi_Host *instance = cmd->device->host; 177 178 /* FIXME perform bus-specific reset */ 179 180 /* FIXME 2: shouldn't we no-op this function (return 181 FAILED), and fall back to host reset function, 182 wd33c93_host_reset ? */ 183 184 spin_lock_irq(instance->host_lock); 185 wd33c93_host_reset(cmd); 186 spin_unlock_irq(instance->host_lock); 187 188 return SUCCESS; 189 } 190 191 static struct scsi_host_template gvp11_scsi_template = { 192 .module = THIS_MODULE, 193 .name = "GVP Series II SCSI", 194 .proc_info = wd33c93_proc_info, 195 .proc_name = "GVP11", 196 .queuecommand = wd33c93_queuecommand, 197 .eh_abort_handler = wd33c93_abort, 198 .eh_bus_reset_handler = gvp11_bus_reset, 199 .eh_host_reset_handler = wd33c93_host_reset, 200 .can_queue = CAN_QUEUE, 201 .this_id = 7, 202 .sg_tablesize = SG_ALL, 203 .cmd_per_lun = CMD_PER_LUN, 204 .use_clustering = DISABLE_CLUSTERING 205 }; 206 207 static int __devinit check_wd33c93(struct gvp11_scsiregs *regs) 208 { 209 #ifdef CHECK_WD33C93 210 volatile unsigned char *sasr_3393, *scmd_3393; 211 unsigned char save_sasr; 212 unsigned char q, qq; 213 214 /* 215 * These darn GVP boards are a problem - it can be tough to tell 216 * whether or not they include a SCSI controller. This is the 217 * ultimate Yet-Another-GVP-Detection-Hack in that it actually 218 * probes for a WD33c93 chip: If we find one, it's extremely 219 * likely that this card supports SCSI, regardless of Product_ 220 * Code, Board_Size, etc. 221 */ 222 223 /* Get pointers to the presumed register locations and save contents */ 224 225 sasr_3393 = ®s->SASR; 226 scmd_3393 = ®s->SCMD; 227 save_sasr = *sasr_3393; 228 229 /* First test the AuxStatus Reg */ 230 231 q = *sasr_3393; /* read it */ 232 if (q & 0x08) /* bit 3 should always be clear */ 233 return -ENODEV; 234 *sasr_3393 = WD_AUXILIARY_STATUS; /* setup indirect address */ 235 if (*sasr_3393 == WD_AUXILIARY_STATUS) { /* shouldn't retain the write */ 236 *sasr_3393 = save_sasr; /* Oops - restore this byte */ 237 return -ENODEV; 238 } 239 if (*sasr_3393 != q) { /* should still read the same */ 240 *sasr_3393 = save_sasr; /* Oops - restore this byte */ 241 return -ENODEV; 242 } 243 if (*scmd_3393 != q) /* and so should the image at 0x1f */ 244 return -ENODEV; 245 246 /* 247 * Ok, we probably have a wd33c93, but let's check a few other places 248 * for good measure. Make sure that this works for both 'A and 'B 249 * chip versions. 250 */ 251 252 *sasr_3393 = WD_SCSI_STATUS; 253 q = *scmd_3393; 254 *sasr_3393 = WD_SCSI_STATUS; 255 *scmd_3393 = ~q; 256 *sasr_3393 = WD_SCSI_STATUS; 257 qq = *scmd_3393; 258 *sasr_3393 = WD_SCSI_STATUS; 259 *scmd_3393 = q; 260 if (qq != q) /* should be read only */ 261 return -ENODEV; 262 *sasr_3393 = 0x1e; /* this register is unimplemented */ 263 q = *scmd_3393; 264 *sasr_3393 = 0x1e; 265 *scmd_3393 = ~q; 266 *sasr_3393 = 0x1e; 267 qq = *scmd_3393; 268 *sasr_3393 = 0x1e; 269 *scmd_3393 = q; 270 if (qq != q || qq != 0xff) /* should be read only, all 1's */ 271 return -ENODEV; 272 *sasr_3393 = WD_TIMEOUT_PERIOD; 273 q = *scmd_3393; 274 *sasr_3393 = WD_TIMEOUT_PERIOD; 275 *scmd_3393 = ~q; 276 *sasr_3393 = WD_TIMEOUT_PERIOD; 277 qq = *scmd_3393; 278 *sasr_3393 = WD_TIMEOUT_PERIOD; 279 *scmd_3393 = q; 280 if (qq != (~q & 0xff)) /* should be read/write */ 281 return -ENODEV; 282 #endif /* CHECK_WD33C93 */ 283 284 return 0; 285 } 286 287 static int __devinit gvp11_probe(struct zorro_dev *z, 288 const struct zorro_device_id *ent) 289 { 290 struct Scsi_Host *instance; 291 unsigned long address; 292 int error; 293 unsigned int epc; 294 unsigned int default_dma_xfer_mask; 295 struct gvp11_hostdata *hdata; 296 struct gvp11_scsiregs *regs; 297 wd33c93_regs wdregs; 298 299 default_dma_xfer_mask = ent->driver_data; 300 301 /* 302 * Rumors state that some GVP ram boards use the same product 303 * code as the SCSI controllers. Therefore if the board-size 304 * is not 64KB we assume it is a ram board and bail out. 305 */ 306 if (zorro_resource_len(z) != 0x10000) 307 return -ENODEV; 308 309 address = z->resource.start; 310 if (!request_mem_region(address, 256, "wd33c93")) 311 return -EBUSY; 312 313 regs = (struct gvp11_scsiregs *)(ZTWO_VADDR(address)); 314 315 error = check_wd33c93(regs); 316 if (error) 317 goto fail_check_or_alloc; 318 319 instance = scsi_host_alloc(&gvp11_scsi_template, 320 sizeof(struct gvp11_hostdata)); 321 if (!instance) { 322 error = -ENOMEM; 323 goto fail_check_or_alloc; 324 } 325 326 instance->irq = IRQ_AMIGA_PORTS; 327 instance->unique_id = z->slotaddr; 328 329 regs->secret2 = 1; 330 regs->secret1 = 0; 331 regs->secret3 = 15; 332 while (regs->CNTR & GVP11_DMAC_BUSY) 333 ; 334 regs->CNTR = 0; 335 regs->BANK = 0; 336 337 wdregs.SASR = ®s->SASR; 338 wdregs.SCMD = ®s->SCMD; 339 340 hdata = shost_priv(instance); 341 if (gvp11_xfer_mask) 342 hdata->wh.dma_xfer_mask = gvp11_xfer_mask; 343 else 344 hdata->wh.dma_xfer_mask = default_dma_xfer_mask; 345 346 hdata->wh.no_sync = 0xff; 347 hdata->wh.fast = 0; 348 hdata->wh.dma_mode = CTRL_DMA; 349 hdata->regs = regs; 350 351 /* 352 * Check for 14MHz SCSI clock 353 */ 354 epc = *(unsigned short *)(ZTWO_VADDR(address) + 0x8000); 355 wd33c93_init(instance, wdregs, dma_setup, dma_stop, 356 (epc & GVP_SCSICLKMASK) ? WD33C93_FS_8_10 357 : WD33C93_FS_12_15); 358 359 error = request_irq(IRQ_AMIGA_PORTS, gvp11_intr, IRQF_SHARED, 360 "GVP11 SCSI", instance); 361 if (error) 362 goto fail_irq; 363 364 regs->CNTR = GVP11_DMAC_INT_ENABLE; 365 366 error = scsi_add_host(instance, NULL); 367 if (error) 368 goto fail_host; 369 370 zorro_set_drvdata(z, instance); 371 scsi_scan_host(instance); 372 return 0; 373 374 fail_host: 375 free_irq(IRQ_AMIGA_PORTS, instance); 376 fail_irq: 377 scsi_host_put(instance); 378 fail_check_or_alloc: 379 release_mem_region(address, 256); 380 return error; 381 } 382 383 static void __devexit gvp11_remove(struct zorro_dev *z) 384 { 385 struct Scsi_Host *instance = zorro_get_drvdata(z); 386 struct gvp11_hostdata *hdata = shost_priv(instance); 387 388 hdata->regs->CNTR = 0; 389 scsi_remove_host(instance); 390 free_irq(IRQ_AMIGA_PORTS, instance); 391 scsi_host_put(instance); 392 release_mem_region(z->resource.start, 256); 393 } 394 395 /* 396 * This should (hopefully) be the correct way to identify 397 * all the different GVP SCSI controllers (except for the 398 * SERIES I though). 399 */ 400 401 static struct zorro_device_id gvp11_zorro_tbl[] __devinitdata = { 402 { ZORRO_PROD_GVP_COMBO_030_R3_SCSI, ~0x00ffffff }, 403 { ZORRO_PROD_GVP_SERIES_II, ~0x00ffffff }, 404 { ZORRO_PROD_GVP_GFORCE_030_SCSI, ~0x01ffffff }, 405 { ZORRO_PROD_GVP_A530_SCSI, ~0x01ffffff }, 406 { ZORRO_PROD_GVP_COMBO_030_R4_SCSI, ~0x01ffffff }, 407 { ZORRO_PROD_GVP_A1291, ~0x07ffffff }, 408 { ZORRO_PROD_GVP_GFORCE_040_SCSI_1, ~0x07ffffff }, 409 { 0 } 410 }; 411 MODULE_DEVICE_TABLE(zorro, gvp11_zorro_tbl); 412 413 static struct zorro_driver gvp11_driver = { 414 .name = "gvp11", 415 .id_table = gvp11_zorro_tbl, 416 .probe = gvp11_probe, 417 .remove = __devexit_p(gvp11_remove), 418 }; 419 420 static int __init gvp11_init(void) 421 { 422 return zorro_register_driver(&gvp11_driver); 423 } 424 module_init(gvp11_init); 425 426 static void __exit gvp11_exit(void) 427 { 428 zorro_unregister_driver(&gvp11_driver); 429 } 430 module_exit(gvp11_exit); 431 432 MODULE_DESCRIPTION("GVP Series II SCSI"); 433 MODULE_LICENSE("GPL"); 434