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Date: Sun, 25 Sep 2016 21:39:20 +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 4/3] g_NCR5380: Merge g_NCR5380 and g_NCR5380_mmio
Merge the PIO and MMIO code (with the help of ioport_map) in g_NCR5380 and
delete g_NCR5380_mmio.
Signed-off-by: Ondrej Zary <linux@...nbow-software.org>
---
drivers/scsi/Kconfig | 32 ++---
drivers/scsi/g_NCR5380.c | 257 +++++++++++++++++++----------------------
drivers/scsi/g_NCR5380.h | 33 ++----
drivers/scsi/g_NCR5380_mmio.c | 10 --
4 files changed, 135 insertions(+), 197 deletions(-)
delete mode 100644 drivers/scsi/g_NCR5380_mmio.c
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 7d1b431..fd1bca1 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -780,40 +780,22 @@ config SCSI_ISCI
control unit found in the Intel(R) C600 series chipset.
config SCSI_GENERIC_NCR5380
- tristate "Generic NCR5380/53c400 SCSI PIO support"
+ tristate "Generic NCR5380/53c400 SCSI"
depends on ISA && SCSI
select SCSI_SPI_ATTRS
---help---
- This is a driver for the old NCR 53c80 series of SCSI controllers
- on boards using PIO. Most boards such as the Trantor T130 fit this
- category, along with a large number of ISA 8bit controllers shipped
- for free with SCSI scanners. If you have a PAS16, T128 or DMX3191
- you should select the specific driver for that card rather than
- generic 5380 support.
+ This is a driver for the old NCR 53c80 series of SCSI controllers.
+ Most boards such as the Trantor T130 fit this category, along with
+ a large number of ISA 8bit controllers shipped for free with SCSI
+ scanners. If you have a PAS16, T128 or DMX3191 you should select the
+ specific driver for that card rather than generic 5380 support.
It is explained in section 3.8 of the SCSI-HOWTO, available from
- <http://www.tldp.org/docs.html#howto>. If it doesn't work out
- of the box, you may have to change some settings in
- <file:drivers/scsi/g_NCR5380.h>.
+ <http://www.tldp.org/docs.html#howto>.
To compile this driver as a module, choose M here: the
module will be called g_NCR5380.
-config SCSI_GENERIC_NCR5380_MMIO
- tristate "Generic NCR5380/53c400 SCSI MMIO support"
- depends on ISA && SCSI
- select SCSI_SPI_ATTRS
- ---help---
- This is a driver for the old NCR 53c80 series of SCSI controllers
- on boards using memory mapped I/O.
- It is explained in section 3.8 of the SCSI-HOWTO, available from
- <http://www.tldp.org/docs.html#howto>. If it doesn't work out
- of the box, you may have to change some settings in
- <file:drivers/scsi/g_NCR5380.h>.
-
- To compile this driver as a module, choose M here: the
- module will be called g_NCR5380_mmio.
-
config SCSI_IPS
tristate "IBM ServeRAID support"
depends on PCI && SCSI
diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c
index 6cf6b00..7d8fcbf 100644
--- a/drivers/scsi/g_NCR5380.c
+++ b/drivers/scsi/g_NCR5380.c
@@ -50,7 +50,6 @@ MODULE_PARM_DESC(card, "card type (0=NCR5380, 1=NCR53C400, 2=NCR53C400A, 3=DTC31
MODULE_LICENSE("GPL");
-#ifndef SCSI_G_NCR5380_MEM
/*
* Configure I/O address of 53C400A or DTC436 by writing magic numbers
* to ports 0x779 and 0x379.
@@ -72,41 +71,33 @@ static void magic_configure(int idx, u8 irq, u8 magic[])
cfg = 0x80 | idx | (irq << 4);
outb(cfg, 0x379);
}
-#endif
+
+static unsigned int ncr_53c400a_ports[] __initdata = {
+ 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
+};
+static unsigned int dtc_3181e_ports[] __initdata = {
+ 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
+};
+static u8 ncr_53c400a_magic[] __initdata = { /* 53C400A & DTC436 */
+ 0x59, 0xb9, 0xc5, 0xae, 0xa6
+};
+static u8 hp_c2502_magic[] __initdata = { /* HP C2502 */
+ 0x0f, 0x22, 0xf0, 0x20, 0x80
+};
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;
+ unsigned int *ports = NULL;
u8 *magic = NULL;
-#ifndef SCSI_G_NCR5380_MEM
- int i;
- int port_idx = -1;
+ int i, port_idx = -1, flags = 0;
unsigned long region_size;
-#endif
- static unsigned int __initdata ncr_53c400a_ports[] = {
- 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
- };
- static unsigned int __initdata dtc_3181e_ports[] = {
- 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
- };
- static u8 ncr_53c400a_magic[] __initdata = { /* 53C400A & DTC436 */
- 0x59, 0xb9, 0xc5, 0xae, 0xa6
- };
- static u8 hp_c2502_magic[] __initdata = { /* HP C2502 */
- 0x0f, 0x22, 0xf0, 0x20, 0x80
- };
- int flags;
struct Scsi_Host *instance;
struct NCR5380_hostdata *hostdata;
-#ifdef SCSI_G_NCR5380_MEM
void __iomem *iomem;
- resource_size_t iomem_size;
-#endif
+ bool is_pio = base <= 0xffff;
- ports = NULL;
- flags = 0;
switch (board) {
case BOARD_NCR5380:
flags = FLAG_NO_PSEUDO_DMA | FLAG_DMA_FIXUP;
@@ -125,8 +116,7 @@ static struct Scsi_Host *generic_NCR5380_hw_init(
break;
}
-#ifndef SCSI_G_NCR5380_MEM
- if (ports && magic) {
+ if (is_pio && ports && magic) {
/* wakeup sequence for the NCR53C400A and DTC3181E */
/* Disable the adapter and look for a free io port */
@@ -162,72 +152,75 @@ static struct Scsi_Host *generic_NCR5380_hw_init(
port_idx = i;
} else
return NULL;
- }
- else
- {
+ } else if (is_pio) {
/* NCR5380 - no configuration, just grab */
region_size = 8;
if (!base || !request_region(base, region_size, "ncr5380"))
return NULL;
+ } else { /* MMIO */
+ region_size = NCR53C400_region_size;
+ if (!request_mem_region(base, region_size, "ncr5380"))
+ return NULL;
}
-#else
- iomem_size = NCR53C400_region_size;
- if (!request_mem_region(base, iomem_size, "ncr5380"))
- return NULL;
- iomem = ioremap(base, iomem_size);
- if (!iomem) {
- release_mem_region(base, iomem_size);
- return NULL;
- }
-#endif
+
+ if (is_pio)
+ iomem = ioport_map(base, region_size);
+ else
+ iomem = ioremap(base, region_size);
+
+ if (!iomem)
+ goto out_release;
+
instance = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata));
if (instance == NULL)
- goto out_release;
+ goto out_unmap;
hostdata = shost_priv(instance);
-#ifndef SCSI_G_NCR5380_MEM
- instance->io_port = base;
- instance->n_io_port = region_size;
- hostdata->io_width = 1; /* 8-bit PDMA by default */
-
- /*
- * On NCR53C400 boards, NCR5380 registers are mapped 8 past
- * the base address.
- */
- switch (board) {
- case BOARD_NCR53C400:
- instance->io_port += 8;
- hostdata->c400_ctl_status = 0;
- hostdata->c400_blk_cnt = 1;
- hostdata->c400_host_buf = 4;
- break;
- case BOARD_DTC3181E:
- hostdata->io_width = 2; /* 16-bit PDMA */
- /* fall through */
- case BOARD_NCR53C400A:
- case BOARD_HP_C2502:
- hostdata->c400_ctl_status = 9;
- hostdata->c400_blk_cnt = 10;
- hostdata->c400_host_buf = 8;
- break;
- }
-#else
- instance->base = base;
hostdata->iomem = iomem;
- hostdata->iomem_size = iomem_size;
- switch (board) {
- case BOARD_NCR53C400:
- hostdata->c400_ctl_status = 0x100;
- hostdata->c400_blk_cnt = 0x101;
- hostdata->c400_host_buf = 0x104;
- break;
- case BOARD_DTC3181E:
- case BOARD_NCR53C400A:
- case BOARD_HP_C2502:
- pr_err(DRV_MODULE_NAME ": unknown register offsets\n");
- goto out_unregister;
+
+ if (is_pio) {
+ instance->io_port = base;
+ instance->n_io_port = region_size;
+ hostdata->io_width = 1; /* 8-bit PDMA by default */
+
+ /*
+ * On NCR53C400 boards, NCR5380 registers are mapped 8 past
+ * the base address.
+ */
+ switch (board) {
+ case BOARD_NCR53C400:
+ instance->io_port += 8;
+ hostdata->c400_ctl_status = 0;
+ hostdata->c400_blk_cnt = 1;
+ hostdata->c400_host_buf = 4;
+ break;
+ case BOARD_DTC3181E:
+ hostdata->io_width = 2; /* 16-bit PDMA */
+ /* fall through */
+ case BOARD_NCR53C400A:
+ case BOARD_HP_C2502:
+ hostdata->c400_ctl_status = 9;
+ hostdata->c400_blk_cnt = 10;
+ hostdata->c400_host_buf = 8;
+ break;
+ }
+ } else {
+ instance->base = base;
+ hostdata->iomem_size = region_size;
+ hostdata->offset = NCR53C400_mem_base;
+ switch (board) {
+ case BOARD_NCR53C400:
+ hostdata->c400_ctl_status = 0x100;
+ hostdata->c400_blk_cnt = 0x101;
+ hostdata->c400_host_buf = 0x104;
+ break;
+ case BOARD_DTC3181E:
+ case BOARD_NCR53C400A:
+ case BOARD_HP_C2502:
+ pr_err(DRV_MODULE_NAME ": unknown register offsets\n");
+ goto out_unregister;
+ }
}
-#endif
if (NCR5380_init(instance, flags | FLAG_LATE_DMA_SETUP))
goto out_unregister;
@@ -252,11 +245,9 @@ static struct Scsi_Host *generic_NCR5380_hw_init(
instance->irq = NO_IRQ;
if (instance->irq != NO_IRQ) {
-#ifndef SCSI_G_NCR5380_MEM
/* set IRQ for HP C2502 */
if (board == BOARD_HP_C2502)
magic_configure(port_idx, instance->irq, magic);
-#endif
if (request_irq(instance->irq, generic_NCR5380_intr,
0, "NCR5380", instance)) {
printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
@@ -278,32 +269,29 @@ static struct Scsi_Host *generic_NCR5380_hw_init(
out_unregister:
scsi_host_put(instance);
-out_release:
-#ifndef SCSI_G_NCR5380_MEM
- release_region(base, region_size);
-#else
+out_unmap:
iounmap(iomem);
- release_mem_region(base, iomem_size);
-#endif
+out_release:
+ if (is_pio)
+ release_region(base, region_size);
+ else
+ release_mem_region(base, region_size);
return NULL;
}
static void generic_NCR5380_release_resources(struct Scsi_Host *instance)
{
+ struct NCR5380_hostdata *hostdata = shost_priv(instance);
+
scsi_remove_host(instance);
if (instance->irq != NO_IRQ)
free_irq(instance->irq, instance);
NCR5380_exit(instance);
-#ifndef SCSI_G_NCR5380_MEM
- release_region(instance->io_port, instance->n_io_port);
-#else
- {
- struct NCR5380_hostdata *hostdata = shost_priv(instance);
-
- iounmap(hostdata->iomem);
+ iounmap(hostdata->iomem);
+ if (instance->io_port)
+ release_region(instance->io_port, instance->n_io_port);
+ else
release_mem_region(instance->base, hostdata->iomem_size);
- }
-#endif
scsi_host_put(instance);
}
@@ -336,18 +324,16 @@ static inline int generic_NCR5380_pread(struct Scsi_Host *instance,
while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; /* FIXME - no timeout */
-#ifndef SCSI_G_NCR5380_MEM
- if (hostdata->io_width == 2)
+ if (instance->io_port && hostdata->io_width == 2)
insw(instance->io_port + hostdata->c400_host_buf,
dst + start, 64);
- else
+ else if (instance->io_port)
insb(instance->io_port + hostdata->c400_host_buf,
dst + start, 128);
-#else
- /* implies SCSI_G_NCR5380_MEM */
- memcpy_fromio(dst + start,
- hostdata->iomem + NCR53C400_host_buffer, 128);
-#endif
+ else
+ memcpy_fromio(dst + start,
+ hostdata->iomem + NCR53C400_host_buffer, 128);
+
start += 128;
blocks--;
}
@@ -356,18 +342,16 @@ static inline int generic_NCR5380_pread(struct Scsi_Host *instance,
while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; /* FIXME - no timeout */
-#ifndef SCSI_G_NCR5380_MEM
- if (hostdata->io_width == 2)
+ if (instance->io_port && hostdata->io_width == 2)
insw(instance->io_port + hostdata->c400_host_buf,
- dst + start, 64);
- else
+ dst + start, 64);
+ else if (instance->io_port)
insb(instance->io_port + hostdata->c400_host_buf,
- dst + start, 128);
-#else
- /* implies SCSI_G_NCR5380_MEM */
- memcpy_fromio(dst + start,
- hostdata->iomem + NCR53C400_host_buffer, 128);
-#endif
+ dst + start, 128);
+ else
+ memcpy_fromio(dst + start,
+ hostdata->iomem + NCR53C400_host_buffer, 128);
+
start += 128;
blocks--;
}
@@ -414,18 +398,17 @@ static inline int generic_NCR5380_pwrite(struct Scsi_Host *instance,
break;
while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; // FIXME - timeout
-#ifndef SCSI_G_NCR5380_MEM
- if (hostdata->io_width == 2)
+
+ if (instance->io_port && hostdata->io_width == 2)
outsw(instance->io_port + hostdata->c400_host_buf,
src + start, 64);
- else
+ else if (instance->io_port)
outsb(instance->io_port + hostdata->c400_host_buf,
src + start, 128);
-#else
- /* implies SCSI_G_NCR5380_MEM */
- memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
- src + start, 128);
-#endif
+ else
+ memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
+ src + start, 128);
+
start += 128;
blocks--;
}
@@ -433,18 +416,16 @@ static inline int generic_NCR5380_pwrite(struct Scsi_Host *instance,
while (NCR5380_read(hostdata->c400_ctl_status) & CSR_HOST_BUF_NOT_RDY)
; // FIXME - no timeout
-#ifndef SCSI_G_NCR5380_MEM
- if (hostdata->io_width == 2)
+ if (instance->io_port && hostdata->io_width == 2)
outsw(instance->io_port + hostdata->c400_host_buf,
src + start, 64);
- else
+ else if (instance->io_port)
outsb(instance->io_port + hostdata->c400_host_buf,
src + start, 128);
-#else
- /* implies SCSI_G_NCR5380_MEM */
- memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
- src + start, 128);
-#endif
+ else
+ memcpy_toio(hostdata->iomem + NCR53C400_host_buffer,
+ src + start, 128);
+
start += 128;
blocks--;
}
@@ -544,7 +525,7 @@ static struct isa_driver generic_NCR5380_isa_driver = {
};
static int isa_registered;
-#if !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP)
+#ifdef CONFIG_PNP
static struct pnp_device_id generic_NCR5380_pnp_ids[] = {
{ .id = "DTC436e", .driver_data = BOARD_DTC3181E },
{ .id = "" }
@@ -585,13 +566,13 @@ static struct pnp_driver generic_NCR5380_pnp_driver = {
.remove = generic_NCR5380_pnp_remove,
};
static int pnp_registered;
-#endif /* !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP) */
+#endif /* CONFIG_PNP */
static int __init generic_NCR5380_init(void)
{
int ret = 0;
-#if !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP)
+#ifdef CONFIG_PNP
ret = pnp_register_driver(&generic_NCR5380_pnp_driver);
if (!ret)
pnp_registered = 1;
@@ -600,7 +581,7 @@ static int __init generic_NCR5380_init(void)
if (!ret)
isa_registered = 1;
-#if !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP)
+#ifdef CONFIG_PNP
if (pnp_registered)
ret = 0;
#endif
@@ -612,7 +593,7 @@ static int __init generic_NCR5380_init(void)
static void __exit generic_NCR5380_exit(void)
{
-#if !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP)
+#ifdef CONFIG_PNP
if (pnp_registered)
pnp_unregister_driver(&generic_NCR5380_pnp_driver);
#endif
diff --git a/drivers/scsi/g_NCR5380.h b/drivers/scsi/g_NCR5380.h
index b175b92..2b777824 100644
--- a/drivers/scsi/g_NCR5380.h
+++ b/drivers/scsi/g_NCR5380.h
@@ -14,44 +14,30 @@
#ifndef GENERIC_NCR5380_H
#define GENERIC_NCR5380_H
-#ifndef SCSI_G_NCR5380_MEM
#define DRV_MODULE_NAME "g_NCR5380"
#define NCR5380_read(reg) \
- inb(instance->io_port + (reg))
+ ioread8(((struct NCR5380_hostdata *)shost_priv(instance))->iomem + \
+ ((struct NCR5380_hostdata *)shost_priv(instance))->offset + \
+ (reg))
#define NCR5380_write(reg, value) \
- outb(value, instance->io_port + (reg))
+ iowrite8(value, ((struct NCR5380_hostdata *)shost_priv(instance))->iomem + \
+ ((struct NCR5380_hostdata *)shost_priv(instance))->offset + \
+ (reg))
#define NCR5380_implementation_fields \
+ int offset; \
+ void __iomem *iomem; \
+ resource_size_t iomem_size; \
int c400_ctl_status; \
int c400_blk_cnt; \
int c400_host_buf; \
int io_width;
-#else
-/* therefore SCSI_G_NCR5380_MEM */
-#define DRV_MODULE_NAME "g_NCR5380_mmio"
-
#define NCR53C400_mem_base 0x3880
#define NCR53C400_host_buffer 0x3900
#define NCR53C400_region_size 0x3a00
-#define NCR5380_read(reg) \
- readb(((struct NCR5380_hostdata *)shost_priv(instance))->iomem + \
- NCR53C400_mem_base + (reg))
-#define NCR5380_write(reg, value) \
- writeb(value, ((struct NCR5380_hostdata *)shost_priv(instance))->iomem + \
- NCR53C400_mem_base + (reg))
-
-#define NCR5380_implementation_fields \
- void __iomem *iomem; \
- resource_size_t iomem_size; \
- int c400_ctl_status; \
- int c400_blk_cnt; \
- int c400_host_buf;
-
-#endif
-
#define NCR5380_dma_xfer_len(instance, cmd, phase) \
generic_NCR5380_dma_xfer_len(instance, cmd)
#define NCR5380_dma_recv_setup generic_NCR5380_pread
@@ -73,4 +59,3 @@
#define BOARD_HP_C2502 4
#endif /* GENERIC_NCR5380_H */
-
diff --git a/drivers/scsi/g_NCR5380_mmio.c b/drivers/scsi/g_NCR5380_mmio.c
deleted file mode 100644
index 8cdde71..0000000
--- a/drivers/scsi/g_NCR5380_mmio.c
+++ /dev/null
@@ -1,10 +0,0 @@
-/*
- * There is probably a nicer way to do this but this one makes
- * pretty obvious what is happening. We rebuild the same file with
- * different options for mmio versus pio.
- */
-
-#define SCSI_G_NCR5380_MEM
-
-#include "g_NCR5380.c"
-
--
Ondrej Zary
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