1 // SPDX-License-Identifier: GPL-2.0-only
19 #include <linux/module.h>
38 #define NCR5380_read(reg)           in_8(hostdata->io + ((reg) << 4))
39 #define NCR5380_write(reg, value)   out_8(hostdata->io + ((reg) << 4), value)
54 static int setup_can_queue = -1;
56 static int setup_cmd_per_lun = -1;
58 static int setup_sg_tablesize = -1;
62 static int setup_hostid = -1;
64 static int setup_toshiba_delay = -1;
67 #ifndef MODULE
95 #endif /* !MODULE */
113  * caused the bus error. Post-increment addressing can't be used.
235 		return start - addr; /* Negated to indicate uncertain length */  in mac_pdma_recv()
239 	return addr - start;  in mac_pdma_recv()
250 			return -1;  in mac_pdma_send()
255 			return -2;  in mac_pdma_send()
262 		return start - addr - 1; /* Negated to indicate uncertain length */  in mac_pdma_send()
265 	return addr - start;  in mac_pdma_send()
275 	out_be32(hostdata->io + (CTRL_REG << 4), value);  in write_ctrl_reg()
290 		return -1;  in macscsi_wait_for_drq()
295 	if (n-- == 0) {  in macscsi_wait_for_drq()
296 		NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host);  in macscsi_wait_for_drq()
297 		dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host,  in macscsi_wait_for_drq()
299 		return -1;  in macscsi_wait_for_drq()
311 	u8 __iomem *s = hostdata->pdma_io + (INPUT_DATA_REG << 4);  in macscsi_pread()
314 	hostdata->pdma_residual = len;  in macscsi_pread()
319 		if (macintosh_config->ident == MAC_MODEL_IIFX)  in macscsi_pread()
323 		chunk_bytes = min(hostdata->pdma_residual, 512);  in macscsi_pread()
326 		if (macintosh_config->ident == MAC_MODEL_IIFX)  in macscsi_pread()
331 			hostdata->pdma_residual -= bytes;  in macscsi_pread()
334 		if (hostdata->pdma_residual == 0)  in macscsi_pread()
340 		NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host);  in macscsi_pread()
341 		dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host,  in macscsi_pread()
343 			 __func__, d - dst, len, bytes, chunk_bytes);  in macscsi_pread()
349 			set_host_byte(hostdata->connected, DID_ERROR);  in macscsi_pread()
360 	u8 __iomem *d = hostdata->pdma_io + (OUTPUT_DATA_REG << 4);  in macscsi_pwrite()
362 	hostdata->pdma_residual = len;  in macscsi_pwrite()
367 		if (macintosh_config->ident == MAC_MODEL_IIFX)  in macscsi_pwrite()
371 		chunk_bytes = min(hostdata->pdma_residual, 512);  in macscsi_pwrite()
374 		if (macintosh_config->ident == MAC_MODEL_IIFX)  in macscsi_pwrite()
379 			hostdata->pdma_residual -= bytes;  in macscsi_pwrite()
382 		if (hostdata->pdma_residual == 0)  in macscsi_pwrite()
388 		NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host);  in macscsi_pwrite()
389 		dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host,  in macscsi_pwrite()
391 			 __func__, s - src, len, bytes, chunk_bytes);  in macscsi_pwrite()
397 			set_host_byte(hostdata->connected, DID_ERROR);  in macscsi_pwrite()
407 	int resid = NCR5380_to_ncmd(cmd)->this_residual;  in macscsi_dma_xfer_len()
409 	if (hostdata->flags & FLAG_NO_PSEUDO_DMA || resid < setup_use_pdma)  in macscsi_dma_xfer_len()
417 	return hostdata->pdma_residual;  in macscsi_dma_residual()
426 	.module			= THIS_MODULE,
437 	.dma_boundary		= PAGE_SIZE - 1,
444 	struct Scsi_Host *instance;  in mac_scsi_probe()  local
452 		return -ENODEV;  in mac_scsi_probe()
458 	if (!hwreg_present((unsigned char *)pio_mem->start +  in mac_scsi_probe()
460 		pr_info(PFX "no device detected at %pap\n", &pio_mem->start);  in mac_scsi_probe()
461 		return -ENODEV;  in mac_scsi_probe()
473 	instance = scsi_host_alloc(&mac_scsi_template,  in mac_scsi_probe()
475 	if (!instance)  in mac_scsi_probe()
476 		return -ENOMEM;  in mac_scsi_probe()
479 		instance->irq = irq->start;  in mac_scsi_probe()
481 		instance->irq = NO_IRQ;  in mac_scsi_probe()
483 	hostdata = shost_priv(instance);  in mac_scsi_probe()
484 	hostdata->base = pio_mem->start;  in mac_scsi_probe()
485 	hostdata->io = (u8 __iomem *)pio_mem->start;  in mac_scsi_probe()
488 		hostdata->pdma_io = (u8 __iomem *)pdma_mem->start;  in mac_scsi_probe()
494 	error = NCR5380_init(instance, host_flags | FLAG_LATE_DMA_SETUP);  in mac_scsi_probe()
498 	if (instance->irq != NO_IRQ) {  in mac_scsi_probe()
499 		error = request_irq(instance->irq, macscsi_intr, IRQF_SHARED,  in mac_scsi_probe()
500 		                    "NCR5380", instance);  in mac_scsi_probe()
505 	NCR5380_maybe_reset_bus(instance);  in mac_scsi_probe()
507 	error = scsi_add_host(instance, NULL);  in mac_scsi_probe()
511 	platform_set_drvdata(pdev, instance);  in mac_scsi_probe()
513 	scsi_scan_host(instance);  in mac_scsi_probe()
517 	if (instance->irq != NO_IRQ)  in mac_scsi_probe()
518 		free_irq(instance->irq, instance);  in mac_scsi_probe()
520 	NCR5380_exit(instance);  in mac_scsi_probe()
522 	scsi_host_put(instance);  in mac_scsi_probe()
528 	struct Scsi_Host *instance = platform_get_drvdata(pdev);  in mac_scsi_remove()  local
530 	scsi_remove_host(instance);  in mac_scsi_remove()
531 	if (instance->irq != NO_IRQ)  in mac_scsi_remove()
532 		free_irq(instance->irq, instance);  in mac_scsi_remove()
533 	NCR5380_exit(instance);  in mac_scsi_remove()
534 	scsi_host_put(instance);  in mac_scsi_remove()