Message-Id: <1474743545-4731-4-git-send-email-linux@rainbow-software.org>
Date:   Sat, 24 Sep 2016 20:59:05 +0200
From:   Ondrej Zary <linux@...nbow-software.org>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Finn Thain <fthain@...egraphics.com.au>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] g_NCR5380: Stop using scsi_module.c

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

Signed-off-by: Ondrej Zary <linux@...nbow-software.org>
---
 drivers/scsi/g_NCR5380.c |  310 +++++++++++++++++++++++++---------------------
 drivers/scsi/g_NCR5380.h |    8 --
 2 files changed, 169 insertions(+), 149 deletions(-)

diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c
index 5162de6..6cf6b00 100644
--- a/drivers/scsi/g_NCR5380.c
+++ b/drivers/scsi/g_NCR5380.c
@@ -30,24 +30,25 @@
 #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>
 
-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;
-
-static struct card {
-	NCR5380_map_type NCR5380_map_name;
-	int irq;
-	int dma;
-	int board;		/* Use NCR53c400, Ricoh, etc. extensions ? */
-} card;
+#define MAX_CARDS 8
+
+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 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 +74,9 @@ 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 struct Scsi_Host *generic_NCR5380_hw_init(
+			struct scsi_host_template *tpnt, struct device *pdev,
+			int base, int irq, int board)
 {
 	unsigned int *ports;
 	u8 *magic = NULL;
@@ -108,64 +101,13 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 	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 +133,20 @@ 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 NULL;
 					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;
@@ -212,38 +157,36 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 			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];
+				goto out_release;
+			base = ports[i];
 			port_idx = i;
 		} else
-			return 0;
+			return NULL;
 	}
 	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 NULL;
 	}
 #else
-	base = card.NCR5380_map_name;
 	iomem_size = NCR53C400_region_size;
 	if (!request_mem_region(base, iomem_size, "ncr5380"))
-		return 0;
+		return NULL;
 	iomem = ioremap(base, iomem_size);
 	if (!iomem) {
 		release_mem_region(base, iomem_size);
-		return 0;
+		return NULL;
 	}
 #endif
-	instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
+	instance = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata));
 	if (instance == NULL)
 		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 +194,7 @@ 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 +212,10 @@ 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;
@@ -289,7 +232,7 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
 	if (NCR5380_init(instance, flags | FLAG_LATE_DMA_SETUP))
 		goto out_unregister;
 
-	switch (card.board) {
+	switch (board) {
 	case BOARD_NCR53C400:
 	case BOARD_DTC3181E:
 	case BOARD_NCR53C400A:
@@ -299,8 +242,8 @@ 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 +254,7 @@ 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 +269,28 @@ 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;
+	if (scsi_add_host(instance, pdev)) {
+		free_irq(irq, instance);
+		goto out_unregister;
+	}
+	scsi_scan_host(instance);
+	return 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 NULL;
 }
 
-/**
- *	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 +304,7 @@ 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 +494,9 @@ 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 +510,115 @@ 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)
+{
+	struct Scsi_Host *sh = NULL;
+
+	sh = generic_NCR5380_hw_init(&driver_template, pdev, base[ndev],
+				     irq[ndev], card[ndev]);
+	if (!sh && base[ndev])
+		printk(KERN_WARNING "Card not found at address 0x%03x\n",
+				base[ndev]);
+	if (!sh)
+		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}
+	dev_set_drvdata(pdev, sh);
+	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
+	},
+};
+static int isa_registered;
+
+#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)
+{
+	struct Scsi_Host *sh;
+	int base, irq;
 
-MODULE_DEVICE_TABLE(isapnp, id_table);
+	if (pnp_activate_dev(pdev) < 0)
+		return -EBUSY;
+
+	base = pnp_port_start(pdev, 0);
+	irq = pnp_irq(pdev, 0);
+
+	sh = generic_NCR5380_hw_init(&driver_template, &pdev->dev, base, irq,
+				     id->driver_data);
+	if (!sh)
+		return -ENODEV;
+
+	pnp_set_drvdata(pdev, sh);
+	return 0;
+}
+
+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,
+};
+static int pnp_registered;
+#endif /* !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP) */
+
+static int __init generic_NCR5380_init(void)
+{
+	int ret = 0;
+
+#if !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP)
+	ret = pnp_register_driver(&generic_NCR5380_pnp_driver);
+	if (!ret)
+		pnp_registered = 1;
 #endif
+	ret = isa_register_driver(&generic_NCR5380_isa_driver, MAX_CARDS);
+	if (!ret)
+		isa_registered = 1;
+
+#if !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP)
+	if (pnp_registered)
+		ret = 0;
+#endif
+	if (isa_registered)
+		ret = 0;
+
+	return 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

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