1 // SPDX-License-Identifier: GPL-2.0-only
5  *  Copyright (C) 1997-2005 Russell King
16 #include <linux/dma-mapping.h>
19 #include <asm/dma.h>
61 	FAS216_Info		info;  member
70  * Params   : ec    - expansion card structure
71  *          : irqnr - interrupt number
76 	struct powertec_info *info = ec->irq_data;  in powertecscsi_irqenable()  local
77 	writeb(POWERTEC_INTR_ENABLE, info->base + POWERTEC_INTR_CONTROL);  in powertecscsi_irqenable()
82  * Params   : ec    - expansion card structure
83  *          : irqnr - interrupt number
88 	struct powertec_info *info = ec->irq_data;  in powertecscsi_irqdisable()  local
89 	writeb(POWERTEC_INTR_DISABLE, info->base + POWERTEC_INTR_CONTROL);  in powertecscsi_irqdisable()
99  * Params   : host   - card to turn on/off
100  *          : on_off - !0 to turn on, 0 to turn off
105 	struct powertec_info *info = (struct powertec_info *)host->hostdata;  in powertecscsi_terminator_ctl()  local
107 	info->term_ctl = on_off ? POWERTEC_TERM_ENABLE : 0;  in powertecscsi_terminator_ctl()
108 	writeb(info->term_ctl, info->base + POWERTEC_TERM_CONTROL);  in powertecscsi_terminator_ctl()
113  * Params   : irq    - interrupt number
114  *	      dev_id - user-defined (Scsi_Host structure)
118 	struct powertec_info *info = dev_id;  in powertecscsi_intr()  local
120 	return fas216_intr(&info->info);  in powertecscsi_intr()
124  * Purpose  : initialises DMA/PIO
125  * Params   : host      - host
126  *	      SCpnt     - command
127  *	      direction - DMA on to/off of card
128  *	      min_type  - minimum DMA support that we must have for this transfer
135 	struct powertec_info *info = (struct powertec_info *)host->hostdata;  in powertecscsi_dma_setup()  local
137 	int dmach = info->info.scsi.dma;  in powertecscsi_dma_setup()
139 	if (info->info.ifcfg.capabilities & FASCAP_DMA &&  in powertecscsi_dma_setup()
143 		bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);  in powertecscsi_dma_setup()
153 		dma_map_sg(dev, info->sg, bufs, map_dir);  in powertecscsi_dma_setup()
156 		set_dma_sg(dmach, info->sg, bufs);  in powertecscsi_dma_setup()
163 	 * If we're not doing DMA,  in powertecscsi_dma_setup()
170  * Purpose  : stops DMA/PIO
171  * Params   : host  - host
172  *	      SCpnt - command
177 	struct powertec_info *info = (struct powertec_info *)host->hostdata;  in powertecscsi_dma_stop()  local
178 	if (info->info.scsi.dma != NO_DMA)  in powertecscsi_dma_stop()
179 		disable_dma(info->info.scsi.dma);  in powertecscsi_dma_stop()
184  * Params   : host - driver host structure to return info for.
189 	struct powertec_info *info = (struct powertec_info *)host->hostdata;  in powertecscsi_info()  local
193 		host->hostt->name, info->info.scsi.type, info->ec->slot_no,  in powertecscsi_info()
194 		VERSION, info->term_ctl ? "n" : "ff");  in powertecscsi_info()
201  * Params   : host   - host to setup
202  *          : buffer - buffer containing string describing operation
203  *          : length - length of string
204  * Returns  : -EINVAL, or 0
213 		length -= 12;  in powertecscsi_set_proc_info()
221 				ret = -EINVAL;  in powertecscsi_set_proc_info()
223 			ret = -EINVAL;  in powertecscsi_set_proc_info()
225 		ret = -EINVAL;  in powertecscsi_set_proc_info()
234  * Params   : buffer  - a buffer to write information to
235  *	      start   - a pointer into this buffer set by this routine to the start
237  *	      offset  - offset into information that we have read up to.
238  *	      length  - length of buffer
239  *	      inout   - 0 for reading, 1 for writing.
244 	struct powertec_info *info;  in powertecscsi_show_info()  local
246 	info = (struct powertec_info *)host->hostdata;  in powertecscsi_show_info()
249 	fas216_print_host(&info->info, m);  in powertecscsi_show_info()
251 			info->term_ctl ? "n" : "ff");  in powertecscsi_show_info()
253 	fas216_print_stats(&info->info, m);  in powertecscsi_show_info()
254 	fas216_print_devices(&info->info, m);  in powertecscsi_show_info()
262 	struct powertec_info *info = (struct powertec_info *)host->hostdata;  in powertecscsi_show_term()  local
264 	return sprintf(buf, "%d\n", info->term_ctl ? 1 : 0);  in powertecscsi_show_term()
287 	.info				= powertecscsi_info,
306 	struct powertec_info *info;  in powertecscsi_probe()  local
316 		ret = -ENOMEM;  in powertecscsi_probe()
323 		ret = -ENOMEM;  in powertecscsi_probe()
329 	info = (struct powertec_info *)host->hostdata;  in powertecscsi_probe()
330 	info->base = base;  in powertecscsi_probe()
331 	powertecscsi_terminator_ctl(host, term[ec->slot_no]);  in powertecscsi_probe()
333 	info->ec = ec;  in powertecscsi_probe()
334 	info->info.scsi.io_base		= base + POWERTEC_FAS216_OFFSET;  in powertecscsi_probe()
335 	info->info.scsi.io_shift	= POWERTEC_FAS216_SHIFT;  in powertecscsi_probe()
336 	info->info.scsi.irq		= ec->irq;  in powertecscsi_probe()
337 	info->info.scsi.dma		= ec->dma;  in powertecscsi_probe()
338 	info->info.ifcfg.clockrate	= 40; /* MHz */  in powertecscsi_probe()
339 	info->info.ifcfg.select_timeout	= 255;  in powertecscsi_probe()
340 	info->info.ifcfg.asyncperiod	= 200; /* ns */  in powertecscsi_probe()
341 	info->info.ifcfg.sync_max_depth	= 7;  in powertecscsi_probe()
342 	info->info.ifcfg.cntl3		= CNTL3_BS8 | CNTL3_FASTSCSI | CNTL3_FASTCLK;  in powertecscsi_probe()
343 	info->info.ifcfg.disconnect_ok	= 1;  in powertecscsi_probe()
344 	info->info.ifcfg.wide_max_size	= 0;  in powertecscsi_probe()
345 	info->info.ifcfg.capabilities	= 0;  in powertecscsi_probe()
346 	info->info.dma.setup		= powertecscsi_dma_setup;  in powertecscsi_probe()
347 	info->info.dma.pseudo		= NULL;  in powertecscsi_probe()
348 	info->info.dma.stop		= powertecscsi_dma_stop;  in powertecscsi_probe()
350 	ec->irqaddr	= base + POWERTEC_INTR_STATUS;  in powertecscsi_probe()
351 	ec->irqmask	= POWERTEC_INTR_BIT;  in powertecscsi_probe()
353 	ecard_setirq(ec, &powertecscsi_ops, info);  in powertecscsi_probe()
355 	device_create_file(&ec->dev, &dev_attr_bus_term);  in powertecscsi_probe()
361 	ret = request_irq(ec->irq, powertecscsi_intr,  in powertecscsi_probe()
362 			  0, "powertec", info);  in powertecscsi_probe()
365 		       host->host_no, ec->irq, ret);  in powertecscsi_probe()
369 	if (info->info.scsi.dma != NO_DMA) {  in powertecscsi_probe()
370 		if (request_dma(info->info.scsi.dma, "powertec")) {  in powertecscsi_probe()
371 			printk("scsi%d: DMA%d not free, using PIO\n",  in powertecscsi_probe()
372 			       host->host_no, info->info.scsi.dma);  in powertecscsi_probe()
373 			info->info.scsi.dma = NO_DMA;  in powertecscsi_probe()
375 			set_dma_speed(info->info.scsi.dma, 180);  in powertecscsi_probe()
376 			info->info.ifcfg.capabilities |= FASCAP_DMA;  in powertecscsi_probe()
380 	ret = fas216_add(host, &ec->dev);  in powertecscsi_probe()
384 	if (info->info.scsi.dma != NO_DMA)  in powertecscsi_probe()
385 		free_dma(info->info.scsi.dma);  in powertecscsi_probe()
386 	free_irq(ec->irq, info);  in powertecscsi_probe()
392 	device_remove_file(&ec->dev, &dev_attr_bus_term);  in powertecscsi_probe()
405 	struct powertec_info *info = (struct powertec_info *)host->hostdata;  in powertecscsi_remove()  local
410 	device_remove_file(&ec->dev, &dev_attr_bus_term);  in powertecscsi_remove()
412 	if (info->info.scsi.dma != NO_DMA)  in powertecscsi_remove()
413 		free_dma(info->info.scsi.dma);  in powertecscsi_remove()
414 	free_irq(ec->irq, info);  in powertecscsi_remove()