1 // SPDX-License-Identifier: GPL-2.0-only
5  *  Copyright (C) 1997-2005 Russell King
12  *   01-10-1997	RMK		Created, READONLY version
13  *   15-02-1998	RMK		READ/WRITE version
14  *				added DMA support and hardware definitions
15  *   14-03-1998	RMK		Updated DMA support
17  *   15-04-1998	RMK		Only do PIO if FAS216 will allow it.
18  *   27-06-1998	RMK		Changed asm/delay.h to linux/delay.h
19  *   02-04-2000	RMK	0.0.3	Fixed NO_IRQ/NO_DMA problem, updated for new
31 #include <linux/dma-mapping.h>
35 #include <asm/dma.h>
73 	FAS216_Info		info;  member
78 	struct scatterlist	sg[NR_SG];	/* Scatter DMA list	*/
83  * Params   : ec    - expansion card structure
84  *          : irqnr - interrupt number
89 	struct eesoxscsi_info *info = (struct eesoxscsi_info *)ec->irq_data;  in eesoxscsi_irqenable()  local
91 	info->control |= EESOX_INTR_ENABLE;  in eesoxscsi_irqenable()
93 	writeb(info->control, info->ctl_port);  in eesoxscsi_irqenable()
98  * Params   : ec    - expansion card structure
99  *          : irqnr - interrupt number
104 	struct eesoxscsi_info *info = (struct eesoxscsi_info *)ec->irq_data;  in eesoxscsi_irqdisable()  local
106 	info->control &= ~EESOX_INTR_ENABLE;  in eesoxscsi_irqdisable()
108 	writeb(info->control, info->ctl_port);  in eesoxscsi_irqdisable()
118  * Params   : host   - card to turn on/off
119  *          : on_off - !0 to turn on, 0 to turn off
124 	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;  in eesoxscsi_terminator_ctl()  local
127 	spin_lock_irqsave(host->host_lock, flags);  in eesoxscsi_terminator_ctl()
129 		info->control |= EESOX_TERM_ENABLE;  in eesoxscsi_terminator_ctl()
131 		info->control &= ~EESOX_TERM_ENABLE;  in eesoxscsi_terminator_ctl()
133 	writeb(info->control, info->ctl_port);  in eesoxscsi_terminator_ctl()
134 	spin_unlock_irqrestore(host->host_lock, flags);  in eesoxscsi_terminator_ctl()
139  * Params   : irq    - interrupt number
140  *	      dev_id - user-defined (Scsi_Host structure)
145 	struct eesoxscsi_info *info = dev_id;  in eesoxscsi_intr()  local
147 	return fas216_intr(&info->info);  in eesoxscsi_intr()
151  * Purpose  : initialises DMA/PIO
152  * Params   : host      - host
153  *	      SCpnt     - command
154  *	      direction - DMA on to/off of card
155  *	      min_type  - minimum DMA support that we must have for this transfer
162 	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;  in eesoxscsi_dma_setup()  local
164 	int dmach = info->info.scsi.dma;  in eesoxscsi_dma_setup()
167 	    (min_type == fasdma_real_all || SCp->this_residual >= 512)) {  in eesoxscsi_dma_setup()
170 		bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);  in eesoxscsi_dma_setup()
180 		dma_map_sg(dev, info->sg, bufs, map_dir);  in eesoxscsi_dma_setup()
183 		set_dma_sg(dmach, info->sg, bufs);  in eesoxscsi_dma_setup()
189 	 * We don't do DMA, we only do slow PIO  in eesoxscsi_dma_setup()
191 	 * Some day, we will do Pseudo DMA  in eesoxscsi_dma_setup()
214 		 * DMA request active?  in eesoxscsi_buffer_in()
235 			status -= 2;  in eesoxscsi_buffer_in()
236 			length -= 2;  in eesoxscsi_buffer_in()
250 			length -= 8;  in eesoxscsi_buffer_in()
262 			length -= 4;  in eesoxscsi_buffer_in()
269 			length -= 2;  in eesoxscsi_buffer_in()
291 		 * DMA request active?  in eesoxscsi_buffer_out()
303 		status = 16 - status;  in eesoxscsi_buffer_out()
314 			status -= 2;  in eesoxscsi_buffer_out()
315 			length -= 2;  in eesoxscsi_buffer_out()
330 			length -= 8;  in eesoxscsi_buffer_out()
342 			length -= 4;  in eesoxscsi_buffer_out()
349 			length -= 2;  in eesoxscsi_buffer_out()
358 	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;  in eesoxscsi_dma_pseudo()  local
360 		eesoxscsi_buffer_in(SCp->ptr, SCp->this_residual, info->base);  in eesoxscsi_dma_pseudo()
362 		eesoxscsi_buffer_out(SCp->ptr, SCp->this_residual, info->base);  in eesoxscsi_dma_pseudo()
367  * Purpose  : stops DMA/PIO
368  * Params   : host  - host
369  *	      SCpnt - command
374 	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;  in eesoxscsi_dma_stop()  local
375 	if (info->info.scsi.dma != NO_DMA)  in eesoxscsi_dma_stop()
376 		disable_dma(info->info.scsi.dma);  in eesoxscsi_dma_stop()
381  * Params   : host - driver host structure to return info for.
386 	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;  in eesoxscsi_info()  local
390 		host->hostt->name, info->info.scsi.type, info->ec->slot_no,  in eesoxscsi_info()
391 		VERSION, info->control & EESOX_TERM_ENABLE ? "n" : "ff");  in eesoxscsi_info()
398  * Params   : host   - host to setup
399  *          : buffer - buffer containing string describing operation
400  *          : length - length of string
401  * Returns  : -EINVAL, or 0
410 		length -= 9;  in eesoxscsi_set_proc_info()
418 				ret = -EINVAL;  in eesoxscsi_set_proc_info()
420 			ret = -EINVAL;  in eesoxscsi_set_proc_info()
422 		ret = -EINVAL;  in eesoxscsi_set_proc_info()
429 	struct eesoxscsi_info *info;  in eesoxscsi_show_info()  local
431 	info = (struct eesoxscsi_info *)host->hostdata;  in eesoxscsi_show_info()
434 	fas216_print_host(&info->info, m);  in eesoxscsi_show_info()
436 			info->control & EESOX_TERM_ENABLE ? "n" : "ff");  in eesoxscsi_show_info()
438 	fas216_print_stats(&info->info, m);  in eesoxscsi_show_info()
439 	fas216_print_devices(&info->info, m);  in eesoxscsi_show_info()
447 	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;  in eesoxscsi_show_term()  local
449 	return sprintf(buf, "%d\n", info->control & EESOX_TERM_ENABLE ? 1 : 0);  in eesoxscsi_show_term()
456 	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;  in eesoxscsi_store_term()  local
460 		spin_lock_irqsave(host->host_lock, flags);  in eesoxscsi_store_term()
462 			info->control |= EESOX_TERM_ENABLE;  in eesoxscsi_store_term()
464 			info->control &= ~EESOX_TERM_ENABLE;  in eesoxscsi_store_term()
466 		writeb(info->control, info->ctl_port);  in eesoxscsi_store_term()
467 		spin_unlock_irqrestore(host->host_lock, flags);  in eesoxscsi_store_term()
481 	.info				= eesoxscsi_info,
498 	struct eesoxscsi_info *info;  in eesoxscsi_probe()  local
508 		ret = -ENOMEM;  in eesoxscsi_probe()
515 		ret = -ENOMEM;  in eesoxscsi_probe()
521 	info = (struct eesoxscsi_info *)host->hostdata;  in eesoxscsi_probe()
522 	info->ec	= ec;  in eesoxscsi_probe()
523 	info->base	= base;  in eesoxscsi_probe()
524 	info->ctl_port	= base + EESOX_CONTROL;  in eesoxscsi_probe()
525 	info->control	= term[ec->slot_no] ? EESOX_TERM_ENABLE : 0;  in eesoxscsi_probe()
526 	writeb(info->control, info->ctl_port);  in eesoxscsi_probe()
528 	info->info.scsi.io_base		= base + EESOX_FAS216_OFFSET;  in eesoxscsi_probe()
529 	info->info.scsi.io_shift	= EESOX_FAS216_SHIFT;  in eesoxscsi_probe()
530 	info->info.scsi.irq		= ec->irq;  in eesoxscsi_probe()
531 	info->info.scsi.dma		= ec->dma;  in eesoxscsi_probe()
532 	info->info.ifcfg.clockrate	= 40; /* MHz */  in eesoxscsi_probe()
533 	info->info.ifcfg.select_timeout	= 255;  in eesoxscsi_probe()
534 	info->info.ifcfg.asyncperiod	= 200; /* ns */  in eesoxscsi_probe()
535 	info->info.ifcfg.sync_max_depth	= 7;  in eesoxscsi_probe()
536 	info->info.ifcfg.cntl3		= CNTL3_FASTSCSI | CNTL3_FASTCLK;  in eesoxscsi_probe()
537 	info->info.ifcfg.disconnect_ok	= 1;  in eesoxscsi_probe()
538 	info->info.ifcfg.wide_max_size	= 0;  in eesoxscsi_probe()
539 	info->info.ifcfg.capabilities	= FASCAP_PSEUDODMA;  in eesoxscsi_probe()
540 	info->info.dma.setup		= eesoxscsi_dma_setup;  in eesoxscsi_probe()
541 	info->info.dma.pseudo		= eesoxscsi_dma_pseudo;  in eesoxscsi_probe()
542 	info->info.dma.stop		= eesoxscsi_dma_stop;  in eesoxscsi_probe()
544 	ec->irqaddr	= base + EESOX_DMASTAT;  in eesoxscsi_probe()
545 	ec->irqmask	= EESOX_STAT_INTR;  in eesoxscsi_probe()
547 	ecard_setirq(ec, &eesoxscsi_ops, info);  in eesoxscsi_probe()
549 	device_create_file(&ec->dev, &dev_attr_bus_term);  in eesoxscsi_probe()
555 	ret = request_irq(ec->irq, eesoxscsi_intr, 0, "eesoxscsi", info);  in eesoxscsi_probe()
558 		       host->host_no, ec->irq, ret);  in eesoxscsi_probe()
562 	if (info->info.scsi.dma != NO_DMA) {  in eesoxscsi_probe()
563 		if (request_dma(info->info.scsi.dma, "eesox")) {  in eesoxscsi_probe()
564 			printk("scsi%d: DMA%d not free, DMA disabled\n",  in eesoxscsi_probe()
565 			       host->host_no, info->info.scsi.dma);  in eesoxscsi_probe()
566 			info->info.scsi.dma = NO_DMA;  in eesoxscsi_probe()
568 			set_dma_speed(info->info.scsi.dma, 180);  in eesoxscsi_probe()
569 			info->info.ifcfg.capabilities |= FASCAP_DMA;  in eesoxscsi_probe()
570 			info->info.ifcfg.cntl3 |= CNTL3_BS8;  in eesoxscsi_probe()
574 	ret = fas216_add(host, &ec->dev);  in eesoxscsi_probe()
578 	if (info->info.scsi.dma != NO_DMA)  in eesoxscsi_probe()
579 		free_dma(info->info.scsi.dma);  in eesoxscsi_probe()
580 	free_irq(ec->irq, info);  in eesoxscsi_probe()
586 	device_remove_file(&ec->dev, &dev_attr_bus_term);  in eesoxscsi_probe()
599 	struct eesoxscsi_info *info = (struct eesoxscsi_info *)host->hostdata;  in eesoxscsi_remove()  local
604 	if (info->info.scsi.dma != NO_DMA)  in eesoxscsi_remove()
605 		free_dma(info->info.scsi.dma);  in eesoxscsi_remove()
606 	free_irq(ec->irq, info);  in eesoxscsi_remove()
608 	device_remove_file(&ec->dev, &dev_attr_bus_term);  in eesoxscsi_remove()