Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 524 insertions, 0 deletions

diff --git a/drivers/scsi/arm/cumana_2.c b/drivers/scsi/arm/cumana_2.c
new file mode 100644
index 0000000000..c5d8f4313b
--- /dev/null
+++ b/drivers/scsi/arm/cumana_2.c
@@ -0,0 +1,524 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  linux/drivers/acorn/scsi/cumana_2.c
+ *
+ *  Copyright (C) 1997-2005 Russell King
+ *
+ *  Changelog:
+ *   30-08-1997	RMK	0.0.0	Created, READONLY version.
+ *   22-01-1998	RMK	0.0.1	Updated to 2.1.80.
+ *   15-04-1998	RMK	0.0.1	Only do PIO if FAS216 will allow it.
+ *   02-05-1998	RMK	0.0.2	Updated & added DMA support.
+ *   27-06-1998	RMK		Changed asm/delay.h to linux/delay.h
+ *   18-08-1998	RMK	0.0.3	Fixed synchronous transfer depth.
+ *   02-04-2000	RMK	0.0.4	Updated for new error handling code.
+ */
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/ioport.h>
+#include <linux/proc_fs.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+#include <linux/pgtable.h>
+
+#include <asm/dma.h>
+#include <asm/ecard.h>
+#include <asm/io.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+#include "fas216.h"
+#include "arm_scsi.h"
+
+#include <scsi/scsicam.h>
+
+#define CUMANASCSI2_STATUS		(0x0000)
+#define STATUS_INT			(1 << 0)
+#define STATUS_DRQ			(1 << 1)
+#define STATUS_LATCHED			(1 << 3)
+
+#define CUMANASCSI2_ALATCH		(0x0014)
+#define ALATCH_ENA_INT			(3)
+#define ALATCH_DIS_INT			(2)
+#define ALATCH_ENA_TERM			(5)
+#define ALATCH_DIS_TERM			(4)
+#define ALATCH_ENA_BIT32		(11)
+#define ALATCH_DIS_BIT32		(10)
+#define ALATCH_ENA_DMA			(13)
+#define ALATCH_DIS_DMA			(12)
+#define ALATCH_DMA_OUT			(15)
+#define ALATCH_DMA_IN			(14)
+
+#define CUMANASCSI2_PSEUDODMA		(0x0200)
+
+#define CUMANASCSI2_FAS216_OFFSET	(0x0300)
+#define CUMANASCSI2_FAS216_SHIFT	2
+
+/*
+ * Version
+ */
+#define VERSION "1.00 (13/11/2002 2.5.47)"
+
+/*
+ * Use term=0,1,0,0,0 to turn terminators on/off
+ */
+static int term[MAX_ECARDS] = { 1, 1, 1, 1, 1, 1, 1, 1 };
+
+#define NR_SG	256
+
+struct cumanascsi2_info {
+	FAS216_Info		info;
+	struct expansion_card	*ec;
+	void __iomem		*base;
+	unsigned int		terms;		/* Terminator state	*/
+	struct scatterlist	sg[NR_SG];	/* Scatter DMA list	*/
+};
+
+#define CSTATUS_IRQ	(1 << 0)
+#define CSTATUS_DRQ	(1 << 1)
+
+/* Prototype: void cumanascsi_2_irqenable(ec, irqnr)
+ * Purpose  : Enable interrupts on Cumana SCSI 2 card
+ * Params   : ec    - expansion card structure
+ *          : irqnr - interrupt number
+ */
+static void
+cumanascsi_2_irqenable(struct expansion_card *ec, int irqnr)
+{
+	struct cumanascsi2_info *info = ec->irq_data;
+	writeb(ALATCH_ENA_INT, info->base + CUMANASCSI2_ALATCH);
+}
+
+/* Prototype: void cumanascsi_2_irqdisable(ec, irqnr)
+ * Purpose  : Disable interrupts on Cumana SCSI 2 card
+ * Params   : ec    - expansion card structure
+ *          : irqnr - interrupt number
+ */
+static void
+cumanascsi_2_irqdisable(struct expansion_card *ec, int irqnr)
+{
+	struct cumanascsi2_info *info = ec->irq_data;
+	writeb(ALATCH_DIS_INT, info->base + CUMANASCSI2_ALATCH);
+}
+
+static const expansioncard_ops_t cumanascsi_2_ops = {
+	.irqenable	= cumanascsi_2_irqenable,
+	.irqdisable	= cumanascsi_2_irqdisable,
+};
+
+/* Prototype: void cumanascsi_2_terminator_ctl(host, on_off)
+ * Purpose  : Turn the Cumana SCSI 2 terminators on or off
+ * Params   : host   - card to turn on/off
+ *          : on_off - !0 to turn on, 0 to turn off
+ */
+static void
+cumanascsi_2_terminator_ctl(struct Scsi_Host *host, int on_off)
+{
+	struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
+
+	if (on_off) {
+		info->terms = 1;
+		writeb(ALATCH_ENA_TERM, info->base + CUMANASCSI2_ALATCH);
+	} else {
+		info->terms = 0;
+		writeb(ALATCH_DIS_TERM, info->base + CUMANASCSI2_ALATCH);
+	}
+}
+
+/* Prototype: void cumanascsi_2_intr(irq, *dev_id, *regs)
+ * Purpose  : handle interrupts from Cumana SCSI 2 card
+ * Params   : irq    - interrupt number
+ *	      dev_id - user-defined (Scsi_Host structure)
+ */
+static irqreturn_t
+cumanascsi_2_intr(int irq, void *dev_id)
+{
+	struct cumanascsi2_info *info = dev_id;
+
+	return fas216_intr(&info->info);
+}
+
+/* Prototype: fasdmatype_t cumanascsi_2_dma_setup(host, SCpnt, direction, min_type)
+ * Purpose  : initialises DMA/PIO
+ * Params   : host      - host
+ *	      SCpnt     - command
+ *	      direction - DMA on to/off of card
+ *	      min_type  - minimum DMA support that we must have for this transfer
+ * Returns  : type of transfer to be performed
+ */
+static fasdmatype_t
+cumanascsi_2_dma_setup(struct Scsi_Host *host, struct scsi_pointer *SCp,
+		       fasdmadir_t direction, fasdmatype_t min_type)
+{
+	struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
+	struct device *dev = scsi_get_device(host);
+	int dmach = info->info.scsi.dma;
+
+	writeb(ALATCH_DIS_DMA, info->base + CUMANASCSI2_ALATCH);
+
+	if (dmach != NO_DMA &&
+	    (min_type == fasdma_real_all || SCp->this_residual >= 512)) {
+		int bufs, map_dir, dma_dir, alatch_dir;
+
+		bufs = copy_SCp_to_sg(&info->sg[0], SCp, NR_SG);
+
+		if (direction == DMA_OUT) {
+			map_dir = DMA_TO_DEVICE;
+			dma_dir = DMA_MODE_WRITE;
+			alatch_dir = ALATCH_DMA_OUT;
+		} else {
+			map_dir = DMA_FROM_DEVICE;
+			dma_dir = DMA_MODE_READ;
+			alatch_dir = ALATCH_DMA_IN;
+		}
+
+		dma_map_sg(dev, info->sg, bufs, map_dir);
+
+		disable_dma(dmach);
+		set_dma_sg(dmach, info->sg, bufs);
+		writeb(alatch_dir, info->base + CUMANASCSI2_ALATCH);
+		set_dma_mode(dmach, dma_dir);
+		enable_dma(dmach);
+		writeb(ALATCH_ENA_DMA, info->base + CUMANASCSI2_ALATCH);
+		writeb(ALATCH_DIS_BIT32, info->base + CUMANASCSI2_ALATCH);
+		return fasdma_real_all;
+	}
+
+	/*
+	 * If we're not doing DMA,
+	 *  we'll do pseudo DMA
+	 */
+	return fasdma_pio;
+}
+
+/*
+ * Prototype: void cumanascsi_2_dma_pseudo(host, SCpnt, direction, transfer)
+ * Purpose  : handles pseudo DMA
+ * Params   : host      - host
+ *	      SCpnt     - command
+ *	      direction - DMA on to/off of card
+ *	      transfer  - minimum number of bytes we expect to transfer
+ */
+static void
+cumanascsi_2_dma_pseudo(struct Scsi_Host *host, struct scsi_pointer *SCp,
+			fasdmadir_t direction, int transfer)
+{
+	struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
+	unsigned int length;
+	unsigned char *addr;
+
+	length = SCp->this_residual;
+	addr = SCp->ptr;
+
+	if (direction == DMA_OUT)
+#if 0
+		while (length > 1) {
+			unsigned long word;
+			unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
+
+			if (status & STATUS_INT)
+				goto end;
+
+			if (!(status & STATUS_DRQ))
+				continue;
+
+			word = *addr | *(addr + 1) << 8;
+			writew(word, info->base + CUMANASCSI2_PSEUDODMA);
+			addr += 2;
+			length -= 2;
+		}
+#else
+		printk ("PSEUDO_OUT???\n");
+#endif
+	else {
+		if (transfer && (transfer & 255)) {
+			while (length >= 256) {
+				unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
+
+				if (status & STATUS_INT)
+					return;
+	    
+				if (!(status & STATUS_DRQ))
+					continue;
+
+				readsw(info->base + CUMANASCSI2_PSEUDODMA,
+				       addr, 256 >> 1);
+				addr += 256;
+				length -= 256;
+			}
+		}
+
+		while (length > 0) {
+			unsigned long word;
+			unsigned int status = readb(info->base + CUMANASCSI2_STATUS);
+
+			if (status & STATUS_INT)
+				return;
+
+			if (!(status & STATUS_DRQ))
+				continue;
+
+			word = readw(info->base + CUMANASCSI2_PSEUDODMA);
+			*addr++ = word;
+			if (--length > 0) {
+				*addr++ = word >> 8;
+				length --;
+			}
+		}
+	}
+}
+
+/* Prototype: int cumanascsi_2_dma_stop(host, SCpnt)
+ * Purpose  : stops DMA/PIO
+ * Params   : host  - host
+ *	      SCpnt - command
+ */
+static void
+cumanascsi_2_dma_stop(struct Scsi_Host *host, struct scsi_pointer *SCp)
+{
+	struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
+	if (info->info.scsi.dma != NO_DMA) {
+		writeb(ALATCH_DIS_DMA, info->base + CUMANASCSI2_ALATCH);
+		disable_dma(info->info.scsi.dma);
+	}
+}
+
+/* Prototype: const char *cumanascsi_2_info(struct Scsi_Host * host)
+ * Purpose  : returns a descriptive string about this interface,
+ * Params   : host - driver host structure to return info for.
+ * Returns  : pointer to a static buffer containing null terminated string.
+ */
+const char *cumanascsi_2_info(struct Scsi_Host *host)
+{
+	struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
+	static char string[150];
+
+	sprintf(string, "%s (%s) in slot %d v%s terminators o%s",
+		host->hostt->name, info->info.scsi.type, info->ec->slot_no,
+		VERSION, info->terms ? "n" : "ff");
+
+	return string;
+}
+
+/* Prototype: int cumanascsi_2_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
+ * Purpose  : Set a driver specific function
+ * Params   : host   - host to setup
+ *          : buffer - buffer containing string describing operation
+ *          : length - length of string
+ * Returns  : -EINVAL, or 0
+ */
+static int
+cumanascsi_2_set_proc_info(struct Scsi_Host *host, char *buffer, int length)
+{
+	int ret = length;
+
+	if (length >= 11 && strncmp(buffer, "CUMANASCSI2", 11) == 0) {
+		buffer += 11;
+		length -= 11;
+
+		if (length >= 5 && strncmp(buffer, "term=", 5) == 0) {
+			if (buffer[5] == '1')
+				cumanascsi_2_terminator_ctl(host, 1);
+			else if (buffer[5] == '0')
+				cumanascsi_2_terminator_ctl(host, 0);
+			else
+				ret = -EINVAL;
+		} else {
+			ret = -EINVAL;
+		}
+	} else {
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int cumanascsi_2_show_info(struct seq_file *m, struct Scsi_Host *host)
+{
+	struct cumanascsi2_info *info;
+	info = (struct cumanascsi2_info *)host->hostdata;
+
+	seq_printf(m, "Cumana SCSI II driver v%s\n", VERSION);
+	fas216_print_host(&info->info, m);
+	seq_printf(m, "Term    : o%s\n",
+			info->terms ? "n" : "ff");
+
+	fas216_print_stats(&info->info, m);
+	fas216_print_devices(&info->info, m);
+	return 0;
+}
+
+static const struct scsi_host_template cumanascsi2_template = {
+	.module				= THIS_MODULE,
+	.show_info			= cumanascsi_2_show_info,
+	.write_info			= cumanascsi_2_set_proc_info,
+	.name				= "Cumana SCSI II",
+	.info				= cumanascsi_2_info,
+	.queuecommand			= fas216_queue_command,
+	.eh_host_reset_handler		= fas216_eh_host_reset,
+	.eh_bus_reset_handler		= fas216_eh_bus_reset,
+	.eh_device_reset_handler	= fas216_eh_device_reset,
+	.eh_abort_handler		= fas216_eh_abort,
+	.cmd_size			= sizeof(struct fas216_cmd_priv),
+	.can_queue			= 1,
+	.this_id			= 7,
+	.sg_tablesize			= SG_MAX_SEGMENTS,
+	.dma_boundary			= IOMD_DMA_BOUNDARY,
+	.proc_name			= "cumanascsi2",
+};
+
+static int cumanascsi2_probe(struct expansion_card *ec,
+			     const struct ecard_id *id)
+{
+	struct Scsi_Host *host;
+	struct cumanascsi2_info *info;
+	void __iomem *base;
+	int ret;
+
+	ret = ecard_request_resources(ec);
+	if (ret)
+		goto out;
+
+	base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
+	if (!base) {
+		ret = -ENOMEM;
+		goto out_region;
+	}
+
+	host = scsi_host_alloc(&cumanascsi2_template,
+			       sizeof(struct cumanascsi2_info));
+	if (!host) {
+		ret = -ENOMEM;
+		goto out_region;
+	}
+
+	ecard_set_drvdata(ec, host);
+
+	info = (struct cumanascsi2_info *)host->hostdata;
+	info->ec	= ec;
+	info->base	= base;
+
+	cumanascsi_2_terminator_ctl(host, term[ec->slot_no]);
+
+	info->info.scsi.io_base		= base + CUMANASCSI2_FAS216_OFFSET;
+	info->info.scsi.io_shift	= CUMANASCSI2_FAS216_SHIFT;
+	info->info.scsi.irq		= ec->irq;
+	info->info.scsi.dma		= ec->dma;
+	info->info.ifcfg.clockrate	= 40; /* MHz */
+	info->info.ifcfg.select_timeout	= 255;
+	info->info.ifcfg.asyncperiod	= 200; /* ns */
+	info->info.ifcfg.sync_max_depth	= 7;
+	info->info.ifcfg.cntl3		= CNTL3_BS8 | CNTL3_FASTSCSI | CNTL3_FASTCLK;
+	info->info.ifcfg.disconnect_ok	= 1;
+	info->info.ifcfg.wide_max_size	= 0;
+	info->info.ifcfg.capabilities	= FASCAP_PSEUDODMA;
+	info->info.dma.setup		= cumanascsi_2_dma_setup;
+	info->info.dma.pseudo		= cumanascsi_2_dma_pseudo;
+	info->info.dma.stop		= cumanascsi_2_dma_stop;
+
+	ec->irqaddr	= info->base + CUMANASCSI2_STATUS;
+	ec->irqmask	= STATUS_INT;
+
+	ecard_setirq(ec, &cumanascsi_2_ops, info);
+
+	ret = fas216_init(host);
+	if (ret)
+		goto out_free;
+
+	ret = request_irq(ec->irq, cumanascsi_2_intr,
+			  0, "cumanascsi2", info);
+	if (ret) {
+		printk("scsi%d: IRQ%d not free: %d\n",
+		       host->host_no, ec->irq, ret);
+		goto out_release;
+	}
+
+	if (info->info.scsi.dma != NO_DMA) {
+		if (request_dma(info->info.scsi.dma, "cumanascsi2")) {
+			printk("scsi%d: DMA%d not free, using PIO\n",
+			       host->host_no, info->info.scsi.dma);
+			info->info.scsi.dma = NO_DMA;
+		} else {
+			set_dma_speed(info->info.scsi.dma, 180);
+			info->info.ifcfg.capabilities |= FASCAP_DMA;
+		}
+	}
+
+	ret = fas216_add(host, &ec->dev);
+	if (ret == 0)
+		goto out;
+
+	if (info->info.scsi.dma != NO_DMA)
+		free_dma(info->info.scsi.dma);
+	free_irq(ec->irq, info);
+
+ out_release:
+	fas216_release(host);
+
+ out_free:
+	scsi_host_put(host);
+
+ out_region:
+	ecard_release_resources(ec);
+
+ out:
+	return ret;
+}
+
+static void cumanascsi2_remove(struct expansion_card *ec)
+{
+	struct Scsi_Host *host = ecard_get_drvdata(ec);
+	struct cumanascsi2_info *info = (struct cumanascsi2_info *)host->hostdata;
+
+	ecard_set_drvdata(ec, NULL);
+	fas216_remove(host);
+
+	if (info->info.scsi.dma != NO_DMA)
+		free_dma(info->info.scsi.dma);
+	free_irq(ec->irq, info);
+
+	fas216_release(host);
+	scsi_host_put(host);
+	ecard_release_resources(ec);
+}
+
+static const struct ecard_id cumanascsi2_cids[] = {
+	{ MANU_CUMANA, PROD_CUMANA_SCSI_2 },
+	{ 0xffff, 0xffff },
+};
+
+static struct ecard_driver cumanascsi2_driver = {
+	.probe		= cumanascsi2_probe,
+	.remove		= cumanascsi2_remove,
+	.id_table	= cumanascsi2_cids,
+	.drv = {
+		.name		= "cumanascsi2",
+	},
+};
+
+static int __init cumanascsi2_init(void)
+{
+	return ecard_register_driver(&cumanascsi2_driver);
+}
+
+static void __exit cumanascsi2_exit(void)
+{
+	ecard_remove_driver(&cumanascsi2_driver);
+}
+
+module_init(cumanascsi2_init);
+module_exit(cumanascsi2_exit);
+
+MODULE_AUTHOR("Russell King");
+MODULE_DESCRIPTION("Cumana SCSI-2 driver for Acorn machines");
+module_param_array(term, int, NULL, 0);
+MODULE_PARM_DESC(term, "SCSI bus termination");
+MODULE_LICENSE("GPL");