[PATCH 3/3] g_NCR5380: Stop using scsi_module.c

[Ondrej Zary <linux@rainbow-software.org>]

Convert g_NCR5380 to use scsi_add_host instead of scsi_module.c
Use pnp_driver and isa_driver to manage cards.

In order to support multiple cards, new module parameter format is
introduced. The old parameters are kept for compatibility.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
---
 Documentation/scsi/g_NCR5380.txt |   24 ++-
 drivers/scsi/g_NCR5380.c         |  335 ++++++++++++++++++++++----------------
 drivers/scsi/g_NCR5380.h         |    8 -
 3 files changed, 215 insertions(+), 152 deletions(-)

diff --git a/Documentation/scsi/g_NCR5380.txt b/Documentation/scsi/g_NCR5380.txt
index 843cbae..e2c1879 100644
--- a/Documentation/scsi/g_NCR5380.txt
+++ b/Documentation/scsi/g_NCR5380.txt
@@ -28,6 +28,16 @@ time. More info to come in the future.
 This driver works as a module.
 When included as a module, parameters can be passed on the insmod/modprobe
 command line:
+  irq=xx[,...]	the interrupt(s)
+  base=xx[,...]	the port or base address(es) (for port or memory mapped, resp.)
+  card=xx[,...]	card type(s):
+		0 = NCR5380,
+		1 = NCR53C400,
+		2 = NCR53C400A,
+		3 = Domex Technology Corp 3181E (DTC3181E)
+		4 = Hewlett Packard C2502
+
+These old-style parameters can support only one card:
   ncr_irq=xx   the interrupt
   ncr_addr=xx  the port or base address (for port or memory
                mapped, resp.)
@@ -36,11 +46,19 @@ command line:
   ncr_53c400a=1 to set up for a NCR53C400A board
   dtc_3181e=1  to set up for a Domex Technology Corp 3181E board
   hp_c2502=1   to set up for a Hewlett Packard C2502 board
+
 e.g.
-modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
+OLD: modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
+NEW: modprobe g_NCR5380 irq=5 base=0x350 card=0
   for a port mapped NCR5380 board or
-modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
-  for a memory mapped NCR53C400 board with interrupts disabled.
+
+OLD: modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
+NEW: modprobe g_NCR5380 irq=255 base=0xc8000 card=1
+  for a memory mapped NCR53C400 board with interrupts disabled or
+
+NEW: modprobe g_NCR5380 irq=0,7 base=0x240,0x300 card=3,4
+  for two cards: DTC3181 (in non-PnP mode) at 0x240 with no IRQ
+             and HP C2502 at 0x300 with IRQ 7
 
 (255 should be specified for no or DMA interrupt, 254 to autoprobe for an 
      IRQ line if overridden on the command line.)
diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c
index 5162de6..cbf0103 100644
--- a/drivers/scsi/g_NCR5380.c
+++ b/drivers/scsi/g_NCR5380.c
@@ -30,24 +30,41 @@
 #include "NCR5380.h"
 #include <linux/init.h>
 #include <linux/ioport.h>
-#include <linux/isapnp.h>
+#include <linux/isa.h>
+#include <linux/pnp.h>
 #include <linux/interrupt.h>
 
+#define MAX_CARDS 8
+
+/* old-style parameters for compatibility */
 static int ncr_irq;
-static int ncr_dma;
 static int ncr_addr;
 static int ncr_5380;
 static int ncr_53c400;
 static int ncr_53c400a;
 static int dtc_3181e;
 static int hp_c2502;
+module_param(ncr_irq, int, 0);
+module_param(ncr_addr, int, 0);
+module_param(ncr_5380, int, 0);
+module_param(ncr_53c400, int, 0);
+module_param(ncr_53c400a, int, 0);
+module_param(dtc_3181e, int, 0);
+module_param(hp_c2502, int, 0);
+
+static int irq[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+module_param_array(irq, int, NULL, 0);
+MODULE_PARM_DESC(irq, "IRQ number(s)");
 
-static struct card {
-	NCR5380_map_type NCR5380_map_name;
-	int irq;
-	int dma;
-	int board;		/* Use NCR53c400, Ricoh, etc. extensions ? */
-} card;
+static int base[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+module_param_array(base, int, NULL, 0);
+MODULE_PARM_DESC(base, "base address(es)");
+
+static int card[] = { -1, -1, -1, -1, -1, -1, -1, -1 };
+module_param_array(card, int, NULL, 0);
+MODULE_PARM_DESC(card, "card type (0=NCR5380, 1=NCR53C400, 2=NCR53C400A, 3=DTC3181E, 4=HP C2502)");
+
+MODULE_LICENSE("GPL");
 
 #ifndef SCSI_G_NCR5380_MEM
 /*
@@ -73,17 +90,8 @@ static void magic_configure(int idx, u8 irq, u8 magic[])
 }
 #endif
 
-/**
- * 	generic_NCR5380_detect	-	look for NCR5380 controllers
- *	@tpnt: the scsi template
- *
- *	Scan for the present of NCR5380, NCR53C400, NCR53C400A, DTC3181E
- *	and DTC436(ISAPnP) controllers.
- *
- *	Locks: none
- */
-
-static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
+static int generic_NCR5380_init_one(struct scsi_host_template *tpnt,
+			struct device *pdev, int base, int irq, int board)
 {
 	unsigned int *ports;
 	u8 *magic = NULL;
@@ -92,80 +100,29 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 	int port_idx = -1;
 	unsigned long region_size;
 #endif
-	static unsigned int __initdata ncr_53c400a_ports[] = {
+	static unsigned int ncr_53c400a_ports[] = {
 		0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
 	};
-	static unsigned int __initdata dtc_3181e_ports[] = {
+	static unsigned int dtc_3181e_ports[] = {
 		0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
 	};
-	static u8 ncr_53c400a_magic[] __initdata = {	/* 53C400A & DTC436 */
+	static u8 ncr_53c400a_magic[] = {	/* 53C400A & DTC436 */
 		0x59, 0xb9, 0xc5, 0xae, 0xa6
 	};
-	static u8 hp_c2502_magic[] __initdata = {	/* HP C2502 */
+	static u8 hp_c2502_magic[] = {	/* HP C2502 */
 		0x0f, 0x22, 0xf0, 0x20, 0x80
 	};
-	int flags;
+	int flags, ret;
 	struct Scsi_Host *instance;
 	struct NCR5380_hostdata *hostdata;
 #ifdef SCSI_G_NCR5380_MEM
-	unsigned long base;
 	void __iomem *iomem;
 	resource_size_t iomem_size;
 #endif
 
-	if (ncr_irq)
-		card.irq = ncr_irq;
-	if (ncr_dma)
-		card.dma = ncr_dma;
-	if (ncr_addr)
-		card.NCR5380_map_name = (NCR5380_map_type) ncr_addr;
-	if (ncr_5380)
-		card.board = BOARD_NCR5380;
-	else if (ncr_53c400)
-		card.board = BOARD_NCR53C400;
-	else if (ncr_53c400a)
-		card.board = BOARD_NCR53C400A;
-	else if (dtc_3181e)
-		card.board = BOARD_DTC3181E;
-	else if (hp_c2502)
-		card.board = BOARD_HP_C2502;
-#ifndef SCSI_G_NCR5380_MEM
-	if (isapnp_present()) {
-		struct pnp_dev *dev = NULL;
-		while ((dev = pnp_find_dev(NULL, ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e), dev))) {
-			if (pnp_device_attach(dev) < 0)
-				continue;
-			if (pnp_activate_dev(dev) < 0) {
-				printk(KERN_ERR "dtc436e probe: activate failed\n");
-				pnp_device_detach(dev);
-				continue;
-			}
-			if (!pnp_port_valid(dev, 0)) {
-				printk(KERN_ERR "dtc436e probe: no valid port\n");
-				pnp_device_detach(dev);
-				continue;
-			}
-			if (pnp_irq_valid(dev, 0))
-				card.irq = pnp_irq(dev, 0);
-			else
-				card.irq = NO_IRQ;
-			if (pnp_dma_valid(dev, 0))
-				card.dma = pnp_dma(dev, 0);
-			else
-				card.dma = DMA_NONE;
-			card.NCR5380_map_name = (NCR5380_map_type) pnp_port_start(dev, 0);
-			card.board = BOARD_DTC3181E;
-			break;
-		}
-	}
-#endif
-
-	if (!(card.NCR5380_map_name))
-		return 0;
-
 	ports = NULL;
 	flags = 0;
-	switch (card.board) {
+	switch (board) {
 	case BOARD_NCR5380:
 		flags = FLAG_NO_PSEUDO_DMA | FLAG_DMA_FIXUP;
 		break;
@@ -191,17 +148,20 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 		magic_configure(-1, 0, magic);
 
 		region_size = 16;
-
-		if (card.NCR5380_map_name != PORT_AUTO)
+		if (base)
 			for (i = 0; ports[i]; i++) {
-				if (!request_region(ports[i], region_size, "ncr53c80"))
-					continue;
-				if (card.NCR5380_map_name == ports[i])
+				if (base == ports[i]) {	/* index found */
+					if (!request_region(ports[i],
+							    region_size,
+							    "ncr53c80"))
+						return -EBUSY;
 					break;
-				release_region(ports[i], region_size);
-		} else
+				}
+			}
+		else
 			for (i = 0; ports[i]; i++) {
-				if (!request_region(ports[i], region_size, "ncr53c80"))
+				if (!request_region(ports[i], region_size,
+						    "ncr53c80"))
 					continue;
 				if (inb(ports[i]) == 0xff)
 					break;
@@ -211,39 +171,41 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 			/* At this point we have our region reserved */
 			magic_configure(i, 0, magic); /* no IRQ yet */
 			outb(0xc0, ports[i] + 9);
-			if (inb(ports[i] + 9) != 0x80)
-				return 0;
-			card.NCR5380_map_name = ports[i];
+			if (inb(ports[i] + 9) != 0x80) {
+				ret = -ENODEV;
+				goto out_release;
+			}
+			base = ports[i];
 			port_idx = i;
 		} else
-			return 0;
+			return -EINVAL;
 	}
 	else
 	{
-		/* Not a 53C400A style setup - just grab */
+		/* NCR5380 - no configuration, just grab */
 		region_size = 8;
-		if (!request_region(card.NCR5380_map_name,
-		                    region_size, "ncr5380"))
-			return 0;
+		if (!base || !request_region(base, region_size, "ncr5380"))
+			return -EBUSY;
 	}
 #else
-	base = card.NCR5380_map_name;
 	iomem_size = NCR53C400_region_size;
 	if (!request_mem_region(base, iomem_size, "ncr5380"))
-		return 0;
+		return -EBUSY;
 	iomem = ioremap(base, iomem_size);
 	if (!iomem) {
 		release_mem_region(base, iomem_size);
-		return 0;
+		return -ENOMEM;
 	}
 #endif
-	instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
-	if (instance == NULL)
+	instance = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata));
+	if (instance == NULL) {
+		ret = -ENOMEM;
 		goto out_release;
+	}
 	hostdata = shost_priv(instance);
 
 #ifndef SCSI_G_NCR5380_MEM
-	instance->io_port = card.NCR5380_map_name;
+	instance->io_port = base;
 	instance->n_io_port = region_size;
 	hostdata->io_width = 1; /* 8-bit PDMA by default */
 
@@ -251,7 +213,7 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 	 * On NCR53C400 boards, NCR5380 registers are mapped 8 past
 	 * the base address.
 	 */
-	switch (card.board) {
+	switch (board) {
 	case BOARD_NCR53C400:
 		instance->io_port += 8;
 		hostdata->c400_ctl_status = 0;
@@ -269,10 +231,10 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 		break;
 	}
 #else
-	instance->base = card.NCR5380_map_name;
+	instance->base = base;
 	hostdata->iomem = iomem;
 	hostdata->iomem_size = iomem_size;
-	switch (card.board) {
+	switch (board) {
 	case BOARD_NCR53C400:
 		hostdata->c400_ctl_status = 0x100;
 		hostdata->c400_blk_cnt = 0x101;
@@ -282,14 +244,16 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 	case BOARD_NCR53C400A:
 	case BOARD_HP_C2502:
 		pr_err(DRV_MODULE_NAME ": unknown register offsets\n");
+		ret = -EINVAL;
 		goto out_unregister;
 	}
 #endif
 
-	if (NCR5380_init(instance, flags | FLAG_LATE_DMA_SETUP))
+	ret = NCR5380_init(instance, flags | FLAG_LATE_DMA_SETUP);
+	if (ret)
 		goto out_unregister;
 
-	switch (card.board) {
+	switch (board) {
 	case BOARD_NCR53C400:
 	case BOARD_DTC3181E:
 	case BOARD_NCR53C400A:
@@ -299,8 +263,8 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 
 	NCR5380_maybe_reset_bus(instance);
 
-	if (card.irq != IRQ_AUTO)
-		instance->irq = card.irq;
+	if (irq != IRQ_AUTO)
+		instance->irq = irq;
 	else
 		instance->irq = NCR5380_probe_irq(instance, 0xffff);
 
@@ -311,7 +275,7 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 	if (instance->irq != NO_IRQ) {
 #ifndef SCSI_G_NCR5380_MEM
 		/* set IRQ for HP C2502 */
-		if (card.board == BOARD_HP_C2502)
+		if (board == BOARD_HP_C2502)
 			magic_configure(port_idx, instance->irq, magic);
 #endif
 		if (request_irq(instance->irq, generic_NCR5380_intr,
@@ -326,31 +290,32 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 		printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
 	}
 
-	return 1;
+	ret = scsi_add_host(instance, pdev);
+	if (ret)
+		goto out_free_irq;
+	scsi_scan_host(instance);
+	dev_set_drvdata(pdev, instance);
+	return 0;
 
+out_free_irq:
+	if (instance->irq != NO_IRQ)
+		free_irq(instance->irq, instance);
+	NCR5380_exit(instance);
 out_unregister:
-	scsi_unregister(instance);
+	scsi_host_put(instance);
 out_release:
 #ifndef SCSI_G_NCR5380_MEM
-	release_region(card.NCR5380_map_name, region_size);
+	release_region(base, region_size);
 #else
 	iounmap(iomem);
 	release_mem_region(base, iomem_size);
 #endif
-	return 0;
+	return ret;
 }
 
-/**
- *	generic_NCR5380_release_resources	-	free resources
- *	@instance: host adapter to clean up 
- *
- *	Free the generic interface resources from this adapter.
- *
- *	Locks: none
- */
- 
-static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
+static void generic_NCR5380_release_resources(struct Scsi_Host *instance)
 {
+	scsi_remove_host(instance);
 	if (instance->irq != NO_IRQ)
 		free_irq(instance->irq, instance);
 	NCR5380_exit(instance);
@@ -364,7 +329,7 @@ static int generic_NCR5380_release_resources(struct Scsi_Host *instance)
 		release_mem_region(instance->base, hostdata->iomem_size);
 	}
 #endif
-	return 0;
+	scsi_host_put(instance);
 }
 
 /**
@@ -554,10 +519,9 @@ static int generic_NCR5380_dma_xfer_len(struct Scsi_Host *instance,
 #include "NCR5380.c"
 
 static struct scsi_host_template driver_template = {
+	.module			= THIS_MODULE,
 	.proc_name		= DRV_MODULE_NAME,
 	.name			= "Generic NCR5380/NCR53C400 SCSI",
-	.detect			= generic_NCR5380_detect,
-	.release		= generic_NCR5380_release_resources,
 	.info			= generic_NCR5380_info,
 	.queuecommand		= generic_NCR5380_queue_command,
 	.eh_abort_handler	= generic_NCR5380_abort,
@@ -571,26 +535,115 @@ static struct scsi_host_template driver_template = {
 	.max_sectors		= 128,
 };
 
-#include "scsi_module.c"
 
-module_param(ncr_irq, int, 0);
-module_param(ncr_dma, int, 0);
-module_param(ncr_addr, int, 0);
-module_param(ncr_5380, int, 0);
-module_param(ncr_53c400, int, 0);
-module_param(ncr_53c400a, int, 0);
-module_param(dtc_3181e, int, 0);
-module_param(hp_c2502, int, 0);
-MODULE_LICENSE("GPL");
+static int generic_NCR5380_isa_match(struct device *pdev, unsigned int ndev)
+{
+	int ret = generic_NCR5380_init_one(&driver_template, pdev, base[ndev],
+					  irq[ndev], card[ndev]);
+	if (ret) {
+		if (base[ndev])
+			printk(KERN_WARNING "Card not found at address 0x%03x\n",
+			       base[ndev]);
+		return 0;
+	}
 
-#if !defined(SCSI_G_NCR5380_MEM) && defined(MODULE)
-static struct isapnp_device_id id_table[] = {
-	{
-	 ISAPNP_ANY_ID, ISAPNP_ANY_ID,
-	 ISAPNP_VENDOR('D', 'T', 'C'), ISAPNP_FUNCTION(0x436e),
-	 0},
-	{0}
+	return 1;
+}
+
+static int generic_NCR5380_isa_remove(struct device *pdev,
+				   unsigned int ndev)
+{
+	generic_NCR5380_release_resources(dev_get_drvdata(pdev));
+	dev_set_drvdata(pdev, NULL);
+	return 0;
+}
+
+static struct isa_driver generic_NCR5380_isa_driver = {
+	.match		= generic_NCR5380_isa_match,
+	.remove		= generic_NCR5380_isa_remove,
+	.driver		= {
+		.name	= DRV_MODULE_NAME
+	},
+};
+
+#if !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP)
+static struct pnp_device_id generic_NCR5380_pnp_ids[] = {
+	{ .id = "DTC436e", .driver_data = BOARD_DTC3181E },
+	{ .id = "" }
+};
+MODULE_DEVICE_TABLE(pnp, generic_NCR5380_pnp_ids);
+
+static int generic_NCR5380_pnp_probe(struct pnp_dev *pdev,
+			       const struct pnp_device_id *id)
+{
+	int base, irq;
+
+	if (pnp_activate_dev(pdev) < 0)
+		return -EBUSY;
+
+	base = pnp_port_start(pdev, 0);
+	irq = pnp_irq(pdev, 0);
+
+	return generic_NCR5380_init_one(&driver_template, &pdev->dev, base, irq,
+				       id->driver_data);
+}
+
+static void generic_NCR5380_pnp_remove(struct pnp_dev *pdev)
+{
+	generic_NCR5380_release_resources(pnp_get_drvdata(pdev));
+	pnp_set_drvdata(pdev, NULL);
+}
+
+static struct pnp_driver generic_NCR5380_pnp_driver = {
+	.name		= DRV_MODULE_NAME,
+	.id_table	= generic_NCR5380_pnp_ids,
+	.probe		= generic_NCR5380_pnp_probe,
+	.remove		= generic_NCR5380_pnp_remove,
 };
+#endif /* !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP) */
 
-MODULE_DEVICE_TABLE(isapnp, id_table);
+static int pnp_registered, isa_registered;
+
+static int __init generic_NCR5380_init(void)
+{
+	int ret = 0;
+
+	/* compatibility with old-style parameters */
+	if (irq[0] == 0 && base[0] == 0 && card[0] == -1) {
+		irq[0] = ncr_irq;
+		base[0] = ncr_addr;
+		if (ncr_5380)
+			card[0] = BOARD_NCR5380;
+		if (ncr_53c400)
+			card[0] = BOARD_NCR53C400;
+		if (ncr_53c400a)
+			card[0] = BOARD_NCR53C400A;
+		if (dtc_3181e)
+			card[0] = BOARD_DTC3181E;
+		if (hp_c2502)
+			card[0] = BOARD_HP_C2502;
+	}
+
+#if !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP)
+	if (!pnp_register_driver(&generic_NCR5380_pnp_driver))
+		pnp_registered = 1;
 #endif
+	ret = isa_register_driver(&generic_NCR5380_isa_driver, MAX_CARDS);
+	if (!ret)
+		isa_registered = 1;
+
+	return (pnp_registered || isa_registered) ? 0 : ret;
+}
+
+static void __exit generic_NCR5380_exit(void)
+{
+#if !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP)
+	if (pnp_registered)
+		pnp_unregister_driver(&generic_NCR5380_pnp_driver);
+#endif
+	if (isa_registered)
+		isa_unregister_driver(&generic_NCR5380_isa_driver);
+}
+
+module_init(generic_NCR5380_init);
+module_exit(generic_NCR5380_exit);
diff --git a/drivers/scsi/g_NCR5380.h b/drivers/scsi/g_NCR5380.h
index 5951774..b175b92 100644
--- a/drivers/scsi/g_NCR5380.h
+++ b/drivers/scsi/g_NCR5380.h
@@ -14,15 +14,9 @@
 #ifndef GENERIC_NCR5380_H
 #define GENERIC_NCR5380_H
 
-#define __STRVAL(x) #x
-#define STRVAL(x) __STRVAL(x)
-
 #ifndef SCSI_G_NCR5380_MEM
 #define DRV_MODULE_NAME "g_NCR5380"
 
-#define NCR5380_map_type int
-#define NCR5380_map_name port
-
 #define NCR5380_read(reg) \
 	inb(instance->io_port + (reg))
 #define NCR5380_write(reg, value) \
@@ -38,8 +32,6 @@
 /* therefore SCSI_G_NCR5380_MEM */
 #define DRV_MODULE_NAME "g_NCR5380_mmio"
 
-#define NCR5380_map_type unsigned long
-#define NCR5380_map_name base
 #define NCR53C400_mem_base 0x3880
 #define NCR53C400_host_buffer 0x3900
 #define NCR53C400_region_size 0x3a00
-- 
Ondrej Zary