[PATCH 01/12] scsi/g_NCR5380: Merge g_NCR5380 and g_NCR5380_mmio drivers

From: Finn Thain
Date: Tue Oct 04 2016 - 01:41:23 EST

From: Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx>

Merge the port-mapped IO and memory-mapped IO support (with the help of
ioport_map) into the g_NCR5380 module and delete g_NCR5380_mmio.

Signed-off-by: Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx>
---
MAINTAINERS | 1 -
drivers/scsi/Kconfig | 32 +-----
drivers/scsi/Makefile | 1 -
drivers/scsi/g_NCR5380.c | 252 ++++++++++++++++++++----------------------
drivers/scsi/g_NCR5380.h | 33 ++----
drivers/scsi/g_NCR5380_mmio.c | 10 --
6 files changed, 134 insertions(+), 195 deletions(-)
delete mode 100644 drivers/scsi/g_NCR5380_mmio.c

diff --git a/MAINTAINERS b/MAINTAINERS
index e09df13..ffee572a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -7827,7 +7827,6 @@ F: drivers/scsi/arm/oak.c
F: drivers/scsi/atari_scsi.*
F: drivers/scsi/dmx3191d.c
F: drivers/scsi/g_NCR5380.*
-F: drivers/scsi/g_NCR5380_mmio.c
F: drivers/scsi/mac_scsi.*
F: drivers/scsi/sun3_scsi.*
F: drivers/scsi/sun3_scsi_vme.c
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 5d54af3..b67854d 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -766,40 +766,18 @@ 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 ISA card 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 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.
-
- 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>.
+ This is a driver for old ISA card SCSI controllers based on a
+ NCR 5380, 53C80, 53C400, 53C400A, or DTC 436 device.
+ Most boards such as the Trantor T130 fit this category, as do
+ various 8-bit and 16-bit ISA cards bundled with SCSI scanners.

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/Makefile b/drivers/scsi/Makefile
index a2f1c2f..9960a5a 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -77,7 +77,6 @@ obj-$(CONFIG_SCSI_IPS) += ips.o
obj-$(CONFIG_SCSI_FUTURE_DOMAIN)+= fdomain.o
obj-$(CONFIG_SCSI_IN2000) += in2000.o
obj-$(CONFIG_SCSI_GENERIC_NCR5380) += g_NCR5380.o
-obj-$(CONFIG_SCSI_GENERIC_NCR5380_MMIO) += g_NCR5380_mmio.o
obj-$(CONFIG_SCSI_NCR53C406A) += NCR53c406a.o
obj-$(CONFIG_SCSI_NCR_D700) += 53c700.o NCR_D700.o
obj-$(CONFIG_SCSI_NCR_Q720) += NCR_Q720_mod.o
diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c
index cbf0103..4d7a9de 100644
--- a/drivers/scsi/g_NCR5380.c
+++ b/drivers/scsi/g_NCR5380.c
@@ -64,9 +64,9 @@ 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_ALIAS("g_NCR5380_mmio");
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.
@@ -88,40 +88,35 @@ 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[] = {
+ 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
+};
+static unsigned int dtc_3181e_ports[] = {
+ 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
+};
+static u8 ncr_53c400a_magic[] = { /* 53C400A & DTC436 */
+ 0x59, 0xb9, 0xc5, 0xae, 0xa6
+};
+static u8 hp_c2502_magic[] = { /* HP C2502 */
+ 0x0f, 0x22, 0xf0, 0x20, 0x80
+};

static int generic_NCR5380_init_one(struct scsi_host_template *tpnt,
struct device *pdev, int base, int irq, int board)
{
- unsigned int *ports;
+ bool is_pmio = base <= 0xffff;
+ int ret;
+ int flags = 0;
+ unsigned int *ports = NULL;
u8 *magic = NULL;
-#ifndef SCSI_G_NCR5380_MEM
int i;
int port_idx = -1;
unsigned long region_size;
-#endif
- static unsigned int ncr_53c400a_ports[] = {
- 0x280, 0x290, 0x300, 0x310, 0x330, 0x340, 0x348, 0x350, 0
- };
- static unsigned int dtc_3181e_ports[] = {
- 0x220, 0x240, 0x280, 0x2a0, 0x2c0, 0x300, 0x320, 0x340, 0
- };
- static u8 ncr_53c400a_magic[] = { /* 53C400A & DTC436 */
- 0x59, 0xb9, 0xc5, 0xae, 0xa6
- };
- static u8 hp_c2502_magic[] = { /* HP C2502 */
- 0x0f, 0x22, 0xf0, 0x20, 0x80
- };
- int flags, ret;
struct Scsi_Host *instance;
struct NCR5380_hostdata *hostdata;
-#ifdef SCSI_G_NCR5380_MEM
void __iomem *iomem;
- resource_size_t iomem_size;
-#endif

- ports = NULL;
- flags = 0;
switch (board) {
case BOARD_NCR5380:
flags = FLAG_NO_PSEUDO_DMA | FLAG_DMA_FIXUP;
@@ -140,8 +135,7 @@ static int generic_NCR5380_init_one(struct scsi_host_template *tpnt,
break;
}

-#ifndef SCSI_G_NCR5380_MEM
- if (ports && magic) {
+ if (is_pmio && ports && magic) {
/* wakeup sequence for the NCR53C400A and DTC3181E */

/* Disable the adapter and look for a free io port */
@@ -179,75 +173,81 @@ static int generic_NCR5380_init_one(struct scsi_host_template *tpnt,
port_idx = i;
} else
return -EINVAL;
- }
- else
- {
+ } else if (is_pmio) {
/* NCR5380 - no configuration, just grab */
region_size = 8;
if (!base || !request_region(base, region_size, "ncr5380"))
return -EBUSY;
+ } else { /* MMIO */
+ region_size = NCR53C400_region_size;
+ if (!request_mem_region(base, region_size, "ncr5380"))
+ return -EBUSY;
}
-#else
- iomem_size = NCR53C400_region_size;
- if (!request_mem_region(base, iomem_size, "ncr5380"))
- return -EBUSY;
- iomem = ioremap(base, iomem_size);
+
+ if (is_pmio)
+ iomem = ioport_map(base, region_size);
+ else
+ iomem = ioremap(base, region_size);
+
if (!iomem) {
- release_mem_region(base, iomem_size);
- return -ENOMEM;
+ ret = -ENOMEM;
+ goto out_release;
}
-#endif
+
instance = scsi_host_alloc(tpnt, sizeof(struct NCR5380_hostdata));
if (instance == NULL) {
ret = -ENOMEM;
- 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");
- ret = -EINVAL;
- goto out_unregister;
+
+ if (is_pmio) {
+ instance->io_port = base;
+ instance->n_io_port = region_size;
+ hostdata->io_width = 1; /* 8-bit PDMA by default */
+ hostdata->offset = 0;
+
+ /*
+ * 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");
+ ret = -EINVAL;
+ goto out_unregister;
+ }
}
-#endif

ret = NCR5380_init(instance, flags | FLAG_LATE_DMA_SETUP);
if (ret)
@@ -273,11 +273,9 @@ static int generic_NCR5380_init_one(struct scsi_host_template *tpnt,
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);
@@ -303,32 +301,29 @@ out_free_irq:
NCR5380_exit(instance);
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_pmio)
+ release_region(base, region_size);
+ else
+ release_mem_region(base, region_size);
return ret;
}

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);
}

@@ -361,18 +356,16 @@ 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--;
}
@@ -381,18 +374,16 @@ 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--;
}
@@ -439,18 +430,17 @@ 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--;
}
@@ -458,18 +448,16 @@ 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--;
}
@@ -566,7 +554,7 @@ static struct isa_driver generic_NCR5380_isa_driver = {
},
};

-#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 = "" }
@@ -600,7 +588,7 @@ static struct pnp_driver generic_NCR5380_pnp_driver = {
.probe = generic_NCR5380_pnp_probe,
.remove = generic_NCR5380_pnp_remove,
};
-#endif /* !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP) */
+#endif /* defined(CONFIG_PNP) */

static int pnp_registered, isa_registered;

@@ -624,7 +612,7 @@ static int __init generic_NCR5380_init(void)
card[0] = BOARD_HP_C2502;
}

-#if !defined(SCSI_G_NCR5380_MEM) && defined(CONFIG_PNP)
+#ifdef CONFIG_PNP
if (!pnp_register_driver(&generic_NCR5380_pnp_driver))
pnp_registered = 1;
#endif
@@ -637,7 +625,7 @@ 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"
-
--
2.7.3