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

From: Ondrej Zary
Date: Tue Sep 27 2016 - 15:01:35 EST

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@xxxxxxxxxxxxxxxxxxxx>
---
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