1 /* SPDX-License-Identifier: GPL-2.0 */
15 #include <linux/dma-mapping.h>
28  * 2) NCR 82077 controller manual
29  * 3) Intel 82077 controller manual
44 /* You'll only ever find one controller on an Ultra anyways. */
45 static struct sun_flpy_controller *sun_fdc = (struct sun_flpy_controller *)-1;
109 		return sbus_readb(&sun_fdc->status_82077) & ~STATUS_DMA;  in sun_82077_fd_inb()
111 		return sbus_readb(&sun_fdc->data_82077);  in sun_82077_fd_inb()
114 		return sbus_readb(&sun_fdc->dir_82077);  in sun_82077_fd_inb()
129 		sbus_writeb(value, &sun_fdc->dor_82077);  in sun_82077_fd_outb()
132 		sbus_writeb(value, &sun_fdc->data_82077);  in sun_82077_fd_outb()
135 		sbus_writeb(value, &sun_fdc->dcr_82077);  in sun_82077_fd_outb()
138 		sbus_writeb(value, &sun_fdc->status_82077);  in sun_82077_fd_outb()
144 /* For pseudo-dma (Sun floppy drives have no real DMA available to
146  * three state variables.  doing_pdma tells our inline low-level
149  * floppy interrupt c-code.  I tried very hard but I could not get the
150  * pseudo-dma to work in c-code without getting many overruns and
151  * underruns.  If non-zero, doing_pdma encodes the direction of
162 /* Common routines to all controller types on the Sparc. */
230 			size--;  in sparc_floppy_irq()
236 		/* Send Terminal Count pulse to floppy controller. */  in sparc_floppy_irq()
261 		return ((error == 0) ? 0 : -1);  in sun_fd_request_irq()
290 static int sun_pci_broken_drive = -1;
298 static struct sun_pci_dma_op sun_pci_dma_current = { -1U, 0, 0, NULL};
299 static struct sun_pci_dma_op sun_pci_dma_pending = { -1U, 0, 0, NULL};
370 	sun_pci_dma_pending.addr = -1U;  in sun_pci_fd_enable_dma()
389 	if (sun_pci_dma_current.addr != -1U)  in sun_pci_fd_disable_dma()
394 	sun_pci_dma_current.addr = -1U;  in sun_pci_fd_disable_dma()
434 	return -EINVAL;  in sun_pci_fd_eject()
458 	while (!((status = inb(MSR)) & 0x80) && --timeout)  in sun_pci_fd_out_byte()
473 		while (!((status = inb(MSR)) & 0x80) && --timeout)  in sun_pci_fd_sensei()
501 	} while ((mask != 0x0f) && --timeout);  in sun_pci_fd_reset()
521 	} while (((status & 0xc0) == 0x80) && --timeout);  in sun_pci_fd_test_drive()
535 static int __init ebus_fdthree_p(struct device_node *dp)  in ebus_fdthree_p()  argument
537 	if (of_node_name_eq(dp, "fdthree"))  in ebus_fdthree_p()
539 	if (of_node_name_eq(dp, "floppy")) {  in ebus_fdthree_p()
542 		compat = of_get_property(dp, "compatible", NULL);  in ebus_fdthree_p()
552 	struct device_node *dp;  in sun_floppy_init()  local
563 	for_each_node_by_name(dp, "SUNW,fdtwo") {  in sun_floppy_init()
564 		if (!of_node_name_eq(dp->parent, "sbus"))  in sun_floppy_init()
566 		op = of_find_device_by_node(dp);  in sun_floppy_init()
572 		FLOPPY_IRQ = op->archdata.irqs[0];  in sun_floppy_init()
579 		dp = NULL;  in sun_floppy_init()
581 			for (dp = ebus_dp->child; dp; dp = dp->sibling) {  in sun_floppy_init()
582 				if (ebus_fdthree_p(dp))  in sun_floppy_init()
587 		if (!dp)  in sun_floppy_init()
590 		op = of_find_device_by_node(dp);  in sun_floppy_init()
594 		state_prop = of_get_property(op->dev.of_node, "status", NULL);  in sun_floppy_init()
598 		FLOPPY_IRQ = op->archdata.irqs[0];  in sun_floppy_init()
603 		auxio_reg = (void __iomem *) op->resource[2].start;  in sun_floppy_init()
606 		sun_floppy_dev = &op->dev;  in sun_floppy_init()
612 			op->resource[1].start;  in sun_floppy_init()
626 		sun_fdc = (struct sun_flpy_controller *) op->resource[0].start;  in sun_floppy_init()
644 		fdc_status = (unsigned long) &sun_fdc->status_82077;  in sun_floppy_init()
664 		for (dp = ebus_dp->child; dp; dp = dp->sibling) {  in sun_floppy_init()
665 			if (of_node_name_eq(dp, "ecpp")) {  in sun_floppy_init()
668 				ecpp_op = of_find_device_by_node(dp);  in sun_floppy_init()
670 					config = ecpp_op->resource[1].start;  in sun_floppy_init()
692 		/* Enable PC-AT mode. */  in sun_floppy_init()
710 			if (sun_pci_broken_drive != -1) {  in sun_floppy_init()
711 				sun_pci_broken_drive = 1 - sun_pci_broken_drive;  in sun_floppy_init()
719 	prop = of_get_property(op->dev.of_node, "status", NULL);  in sun_floppy_init()
730 		(op->resource[0].start +  in sun_floppy_init()
731 		 ((op->resource[0].flags & 0x1ffUL) << 32UL));  in sun_floppy_init()
734 	if (sbus_readb(&sun_fdc->status1_82077) == 0xff) {  in sun_floppy_init()
735 		sun_fdc = (struct sun_flpy_controller *)-1;  in sun_floppy_init()
755         fdc_status = (unsigned long) &sun_fdc->status_82077;  in sun_floppy_init()