drivers/scsi/fdomain.c

1 // SPDX-License-Identifier: GPL-2.0
3  * Driver for Future Domain TMC-16x0 and TMC-3260 SCSI host adapters
12  *    TMC-1800, TMC-18C50, TMC-18C30, TMC-36C70
14  *    Future Domain TMC-1650, TMC-1660, TMC-1670, TMC-1680, TMC-1610M/MER/MEX
15  *    Future Domain TMC-3260 (PCI)
16  *    Quantum ISA-200S, ISA-250MG
17  *    Adaptec AHA-2920A (PCI) [BUT *NOT* AHA-2920C -- use aic7xxx instead]
22  * The Adaptec AHA-2920C has an Adaptec AIC-7850 chip on it.
25  * The Adaptec AHA-2920A has a Future Domain chip on it, so this is the right
30  * If you have a TMC-8xx or TMC-9xx board, then this is not the driver for
35  * This is the Linux low-level SCSI driver for Future Domain TMC-1660/1680
36  * TMC-1650/1670, and TMC-3260 SCSI host adapters.  The 1650 and 1670 have a
37  * 25-pin external connector, whereas the 1660 and 1680 have a SCSI-2 50-pin
38  * high-density external connector.  The 1670 and 1680 have floppy disk
39  * controllers built in.  The TMC-3260 is a PCI bus card.
41  * Future Domain's older boards are based on the TMC-1800 chip, and this
42  * driver was originally written for a TMC-1680 board with the TMC-1800 chip.
43  * More recently, boards are being produced with the TMC-18C50 and TMC-18C30
48  * rest of the SCSI industry.
53  * "TMC-1800 SCSI Chip Specification (FDC-1800T)", Future Domain Corporation,
64  * "Draft Proposed American National Standard: Small Computer System
65  * Interface - 2 (SCSI-2)", Global Engineering Documents. (X3T9.2/86-109,
73  * TMC-18C30 detection.)
79  * 6-1.
125 	outb(0, fd->base + REG_BCTL);  in fdomain_make_bus_idle()
126 	outb(0, fd->base + REG_MCTL);  in fdomain_make_bus_idle()
127 	if (fd->chip == tmc18c50 || fd->chip == tmc18c30)  in fdomain_make_bus_idle()
130 		     fd->base + REG_ACTL);  in fdomain_make_bus_idle()
132 		outb(ACTL_RESET | PARITY_MASK, fd->base + REG_ACTL);  in fdomain_make_bus_idle()
148 	/* Try to toggle 32-bit mode. This only works on an 18c30 chip. */  in fdomain_identify()
188 	outb(BCTL_BUSEN | BCTL_SEL, fd->base + REG_BCTL);  in fdomain_select()
189 	outb(BIT(sh->this_id) | BIT(target), fd->base + REG_SCSI_DATA_NOACK);  in fdomain_select()
192 	outb(PARITY_MASK, fd->base + REG_ACTL);  in fdomain_select()
197 		status = inb(fd->base + REG_BSTAT);  in fdomain_select()
201 			outb(BCTL_BUSEN, fd->base + REG_BCTL);  in fdomain_select()
205 	} while (--timeout);  in fdomain_select()
212 	outb(0, fd->base + REG_ICTL);  in fdomain_finish_cmd()
214 	scsi_done(fd->cur_cmd);  in fdomain_finish_cmd()
215 	fd->cur_cmd = NULL;  in fdomain_finish_cmd()
220 	struct fdomain *fd = shost_priv(cmd->device->host);  in fdomain_read_data()
224 	while ((len = inw(fd->base + REG_FIFO_COUNT)) > 0) {  in fdomain_read_data()
225 		offset = scsi_bufflen(cmd) - scsi_get_resid(cmd);  in fdomain_read_data()
230 			*ptr++ = inb(fd->base + REG_FIFO);  in fdomain_read_data()
232 			insw(fd->base + REG_FIFO, ptr, len >> 1);  in fdomain_read_data()
233 		scsi_set_resid(cmd, scsi_get_resid(cmd) - len);  in fdomain_read_data()
240 	struct fdomain *fd = shost_priv(cmd->device->host);  in fdomain_write_data()
241 	/* 8k FIFO for pre-tmc18c30 chips, 2k FIFO for tmc18c30 */  in fdomain_write_data()
242 	int FIFO_Size = fd->chip == tmc18c30 ? 0x800 : 0x2000;  in fdomain_write_data()
246 	while ((len = FIFO_Size - inw(fd->base + REG_FIFO_COUNT)) > 512) {  in fdomain_write_data()
247 		offset = scsi_bufflen(cmd) - scsi_get_resid(cmd);  in fdomain_write_data()
249 			len = scsi_bufflen(cmd) - offset;  in fdomain_write_data()
257 			outb(*ptr++, fd->base + REG_FIFO);  in fdomain_write_data()
259 			outsw(fd->base + REG_FIFO, ptr, len >> 1);  in fdomain_write_data()
260 		scsi_set_resid(cmd, scsi_get_resid(cmd) - len);  in fdomain_write_data()
270 	struct scsi_cmnd *cmd = fd->cur_cmd;  in fdomain_work()
276 	spin_lock_irqsave(sh->host_lock, flags);  in fdomain_work()
278 	if (scsi_pointer->phase & in_arbitration) {  in fdomain_work()
279 		status = inb(fd->base + REG_ASTAT);  in fdomain_work()
285 		scsi_pointer->phase = in_selection;  in fdomain_work()
287 		outb(ICTL_SEL | FIFO_COUNT, fd->base + REG_ICTL);  in fdomain_work()
288 		outb(BCTL_BUSEN | BCTL_SEL, fd->base + REG_BCTL);  in fdomain_work()
289 		outb(BIT(cmd->device->host->this_id) | BIT(scmd_id(cmd)),  in fdomain_work()
290 		     fd->base + REG_SCSI_DATA_NOACK);  in fdomain_work()
292 		outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);  in fdomain_work()
294 	} else if (scsi_pointer->phase & in_selection) {  in fdomain_work()
295 		status = inb(fd->base + REG_BSTAT);  in fdomain_work()
298 			if (fdomain_select(cmd->device->host, scmd_id(cmd))) {  in fdomain_work()
304 			outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);  in fdomain_work()
306 		scsi_pointer->phase = in_other;  in fdomain_work()
307 		outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT, fd->base + REG_ICTL);  in fdomain_work()
308 		outb(BCTL_BUSEN, fd->base + REG_BCTL);  in fdomain_work()
312 	/* fdomain_scsi_pointer(cur_cmd)->phase == in_other: this is the body of the routine */  in fdomain_work()
313 	status = inb(fd->base + REG_BSTAT);  in fdomain_work()
318 			outb(cmd->cmnd[scsi_pointer->sent_command++],  in fdomain_work()
319 			     fd->base + REG_SCSI_DATA);  in fdomain_work()
321 		case 0:	/* DATA OUT -- tmc18c50/tmc18c30 only */  in fdomain_work()
322 			if (fd->chip != tmc1800 && !scsi_pointer->have_data_in) {  in fdomain_work()
323 				scsi_pointer->have_data_in = -1;  in fdomain_work()
325 				     PARITY_MASK, fd->base + REG_ACTL);  in fdomain_work()
328 		case BSTAT_IO:	/* DATA IN -- tmc18c50/tmc18c30 only */  in fdomain_work()
329 			if (fd->chip != tmc1800 && !scsi_pointer->have_data_in) {  in fdomain_work()
330 				scsi_pointer->have_data_in = 1;  in fdomain_work()
332 				     fd->base + REG_ACTL);  in fdomain_work()
336 			scsi_pointer->Status = inb(fd->base + REG_SCSI_DATA);  in fdomain_work()
339 			outb(MESSAGE_REJECT, fd->base + REG_SCSI_DATA);  in fdomain_work()
342 			scsi_pointer->Message = inb(fd->base + REG_SCSI_DATA);  in fdomain_work()
343 			if (scsi_pointer->Message == COMMAND_COMPLETE)  in fdomain_work()
349 	if (fd->chip == tmc1800 && !scsi_pointer->have_data_in &&  in fdomain_work()
350 	    scsi_pointer->sent_command >= cmd->cmd_len) {  in fdomain_work()
351 		if (cmd->sc_data_direction == DMA_TO_DEVICE) {  in fdomain_work()
352 			scsi_pointer->have_data_in = -1;  in fdomain_work()
354 			     PARITY_MASK, fd->base + REG_ACTL);  in fdomain_work()
356 			scsi_pointer->have_data_in = 1;  in fdomain_work()
358 			     fd->base + REG_ACTL);  in fdomain_work()
362 	if (scsi_pointer->have_data_in == -1) /* DATA OUT */  in fdomain_work()
365 	if (scsi_pointer->have_data_in == 1) /* DATA IN */  in fdomain_work()
369 		set_status_byte(cmd, scsi_pointer->Status);  in fdomain_work()
371 		scsi_msg_to_host_byte(cmd, scsi_pointer->Message);  in fdomain_work()
374 		if (scsi_pointer->phase & disconnect) {  in fdomain_work()
376 			     fd->base + REG_ICTL);  in fdomain_work()
377 			outb(0, fd->base + REG_BCTL);  in fdomain_work()
380 			     fd->base + REG_ICTL);  in fdomain_work()
383 	spin_unlock_irqrestore(sh->host_lock, flags);  in fdomain_work()
391 	if ((inb(fd->base + REG_ASTAT) & ASTAT_IRQ) == 0)  in fdomain_irq()
394 	outb(0, fd->base + REG_ICTL);  in fdomain_irq()
397 	if (!fd->cur_cmd)	/* Spurious interrupt */  in fdomain_irq()
400 	schedule_work(&fd->work);  in fdomain_irq()
408 	struct fdomain *fd = shost_priv(cmd->device->host);  in fdomain_queue()
411 	scsi_pointer->Status		= 0;  in fdomain_queue()
412 	scsi_pointer->Message		= 0;  in fdomain_queue()
413 	scsi_pointer->have_data_in	= 0;  in fdomain_queue()
414 	scsi_pointer->sent_command	= 0;  in fdomain_queue()
415 	scsi_pointer->phase		= in_arbitration;  in fdomain_queue()
418 	spin_lock_irqsave(sh->host_lock, flags);  in fdomain_queue()
420 	fd->cur_cmd = cmd;  in fdomain_queue()
425 	outb(0, fd->base + REG_ICTL);  in fdomain_queue()
426 	outb(0, fd->base + REG_BCTL);	/* Disable data drivers */  in fdomain_queue()
428 	outb(BIT(cmd->device->host->this_id), fd->base + REG_SCSI_DATA_NOACK);  in fdomain_queue()
429 	outb(ICTL_ARB, fd->base + REG_ICTL);  in fdomain_queue()
431 	outb(ACTL_ARB | ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);  in fdomain_queue()
433 	spin_unlock_irqrestore(sh->host_lock, flags);  in fdomain_queue()
440 	struct Scsi_Host *sh = cmd->device->host;  in fdomain_abort()
444 	if (!fd->cur_cmd)  in fdomain_abort()
447 	spin_lock_irqsave(sh->host_lock, flags);  in fdomain_abort()
450 	fdomain_scsi_pointer(fd->cur_cmd)->phase |= aborted;  in fdomain_abort()
453 	set_host_byte(fd->cur_cmd, DID_ABORT);  in fdomain_abort()
455 	spin_unlock_irqrestore(sh->host_lock, flags);  in fdomain_abort()
461 	struct Scsi_Host *sh = cmd->device->host;  in fdomain_host_reset()
465 	spin_lock_irqsave(sh->host_lock, flags);  in fdomain_host_reset()
466 	fdomain_reset(fd->base);  in fdomain_host_reset()
467 	spin_unlock_irqrestore(sh->host_lock, flags);  in fdomain_host_reset()
501 	.name			= "Future Domain TMC-16x0",
510 	.dma_boundary		= PAGE_SIZE - 1,
521 		"Unknown", "TMC-1800", "TMC-18C50", "TMC-18C30"  in fdomain_create()
544 		sh->this_id = this_id & 0x07;  in fdomain_create()
546 	sh->irq = irq;  in fdomain_create()
547 	sh->io_port = base;  in fdomain_create()
548 	sh->n_io_port = FDOMAIN_REGION_SIZE;  in fdomain_create()
551 	fd->base = base;  in fdomain_create()
552 	fd->chip = chip;  in fdomain_create()
553 	INIT_WORK(&fd->work, fdomain_work);  in fdomain_create()
555 	if (dev_is_pci(dev) || !strcmp(dev->bus->name, "pcmcia"))  in fdomain_create()
562 		     dev_is_pci(dev) ? "TMC-36C70 (PCI bus)" : chip_names[chip],  in fdomain_create()
563 		     base, irq, sh->this_id);  in fdomain_create()
584 	cancel_work_sync(&fd->work);  in fdomain_destroy()
586 	if (sh->irq)  in fdomain_destroy()
587 		free_irq(sh->irq, fd);  in fdomain_destroy()
598 	fdomain_reset(fd->base);  in fdomain_resume()
606 MODULE_DESCRIPTION("Future Domain TMC-16x0/TMC-3260 SCSI driver");