1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 1997-2000 Russell King, Stefan Hanske
12  *  30-08-1997	RMK	0.0.0	Created, READONLY version as cumana_2.c
13  *  22-01-1998	RMK	0.0.1	Updated to 2.1.80
14  *  15-04-1998	RMK	0.0.1	Only do PIO if FAS216 will allow it.
15  *  11-06-1998 	SH	0.0.2   Changed to support ARXE 16-bit SCSI card
17  *  01-01-2000	SH	0.1.0   Added *real* pseudo dma writing
19  *  02-04-2000	RMK	0.1.1	Updated for new error handling code.
20  *  22-10-2000  SH		Updated for new registering scheme.
62  * Function: int arxescsi_dma_setup(host, SCpnt, direction, min_type)
64  * Params  : host      - host
65  *	     SCpnt     - command
66  *	     direction - DMA on to/off of card
67  *	     min_type  - minimum DMA support that we must have for this transfer
68  * Returns : 0 if we should not set CMD_WITHDMA for transfer info command
83        "               stmdb   sp!, {r0-r12}\n"  in arxescsi_pseudo_dma_write()
94        "               stmia   r2, {r5-r8}\n\t"  in arxescsi_pseudo_dma_write()
100        "               stmia   r2, {r9-r12}\n"  in arxescsi_pseudo_dma_write()
103        "               ldmia   sp!, {r0-r12}\n"  in arxescsi_pseudo_dma_write()
109  * Function: int arxescsi_dma_pseudo(host, SCpnt, direction, transfer)
111  * Params  : host      - host
112  *	     SCpnt     - command
113  *	     direction - DMA on to/off of card
114  *	     transfer  - minimum number of bytes we expect to transfer
118 		    fasdmadir_t direction, int transfer)  in arxescsi_dma_pseudo()  argument
120 	struct arxescsi_info *info = (struct arxescsi_info *)host->hostdata;  in arxescsi_dma_pseudo()
122 	void __iomem *base = info->info.scsi.io_base;  in arxescsi_dma_pseudo()
125 	length = SCp->this_residual;  in arxescsi_dma_pseudo()
126 	addr = SCp->ptr;  in arxescsi_dma_pseudo()
137 			length -= 256;  in arxescsi_dma_pseudo()
153 					length -= 2;  in arxescsi_dma_pseudo()
156 					length -= 1;  in arxescsi_dma_pseudo()
161 		if (transfer && (transfer & 255)) {  in arxescsi_dma_pseudo()
173 				length -= 256;  in arxescsi_dma_pseudo()
189 				if (--length > 0) {  in arxescsi_dma_pseudo()
191 					length --;  in arxescsi_dma_pseudo()
198  * Function: int arxescsi_dma_stop(host, SCpnt)
200  * Params  : host  - host
201  *	     SCpnt - command
211  * Function: const char *arxescsi_info(struct Scsi_Host * host)
213  * Params  : host - driver host structure to return info for.
218 	struct arxescsi_info *info = (struct arxescsi_info *)host->hostdata;  in arxescsi_info()
222 		host->hostt->name, info->info.scsi.type, info->ec->slot_no,  in arxescsi_info()
232 	info = (struct arxescsi_info *)host->hostdata;  in arxescsi_show_info()
234 	seq_printf(m, "ARXE 16-bit SCSI driver v%s\n", VERSION);  in arxescsi_show_info()
235 	fas216_print_host(&info->info, m);  in arxescsi_show_info()
236 	fas216_print_stats(&info->info, m);  in arxescsi_show_info()
237 	fas216_print_devices(&info->info, m);  in arxescsi_show_info()
254 	.dma_boundary			= PAGE_SIZE - 1,
271 		ret = -ENOMEM;  in arxescsi_probe()
277 		ret = -ENOMEM;  in arxescsi_probe()
281 	info = (struct arxescsi_info *)host->hostdata;  in arxescsi_probe()
282 	info->ec = ec;  in arxescsi_probe()
283 	info->base = base;  in arxescsi_probe()
285 	info->info.scsi.io_base		= base + 0x2000;  in arxescsi_probe()
286 	info->info.scsi.irq		= 0;  in arxescsi_probe()
287 	info->info.scsi.dma		= NO_DMA;  in arxescsi_probe()
288 	info->info.scsi.io_shift	= 5;  in arxescsi_probe()
289 	info->info.ifcfg.clockrate	= 24; /* MHz */  in arxescsi_probe()
290 	info->info.ifcfg.select_timeout = 255;  in arxescsi_probe()
291 	info->info.ifcfg.asyncperiod	= 200; /* ns */  in arxescsi_probe()
292 	info->info.ifcfg.sync_max_depth	= 0;  in arxescsi_probe()
293 	info->info.ifcfg.cntl3		= CNTL3_FASTSCSI | CNTL3_FASTCLK;  in arxescsi_probe()
294 	info->info.ifcfg.disconnect_ok	= 0;  in arxescsi_probe()
295 	info->info.ifcfg.wide_max_size	= 0;  in arxescsi_probe()
296 	info->info.ifcfg.capabilities	= FASCAP_PSEUDODMA;  in arxescsi_probe()
297 	info->info.dma.setup		= arxescsi_dma_setup;  in arxescsi_probe()
298 	info->info.dma.pseudo		= arxescsi_dma_pseudo;  in arxescsi_probe()
299 	info->info.dma.stop		= arxescsi_dma_stop;  in arxescsi_probe()
301 	ec->irqaddr = base;  in arxescsi_probe()
302 	ec->irqmask = CSTATUS_IRQ;  in arxescsi_probe()
308 	ret = fas216_add(host, &ec->dev);  in arxescsi_probe()