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Staging: ipack: Parse vendor and device id.

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Also expose the values through sysfs.

Signed-off-by: Jens Taprogge <jens.taprogge@taprogge.org>
Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jens Taprogge 2012-09-04 17:01:15 +02:00 committed by Greg Kroah-Hartman
parent 187e478240
commit e8ed3276c2
2 changed files with 80 additions and 5 deletions
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81
drivers/staging/ipack/ipack.c
View File

@ -63,11 +63,57 @@ static int ipack_bus_remove(struct device *device)
return 0; return 0;
} }
#define ipack_device_attr(field, format_string) \
static ssize_t \
field##_show(struct device *dev, struct device_attribute *attr, \
char *buf) \
{ \
struct ipack_device *idev = to_ipack_dev(dev); \
return sprintf(buf, format_string, idev->field); \
}
static ssize_t
id_vendor_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct ipack_device *idev = to_ipack_dev(dev);
switch (idev->id_format) {
case IPACK_ID_VERSION_1:
return sprintf(buf, "0x%02x\n", idev->id_vendor);
case IPACK_ID_VERSION_2:
return sprintf(buf, "0x%06x\n", idev->id_vendor);
default:
return -EIO;
}
}
static ssize_t
id_device_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct ipack_device *idev = to_ipack_dev(dev);
switch (idev->id_format) {
case IPACK_ID_VERSION_1:
return sprintf(buf, "0x%02x\n", idev->id_device);
case IPACK_ID_VERSION_2:
return sprintf(buf, "0x%04x\n", idev->id_device);
default:
return -EIO;
}
}
ipack_device_attr(id_format, "0x%hhu\n");
static struct device_attribute ipack_dev_attrs[] = {
__ATTR_RO(id_device),
__ATTR_RO(id_format),
__ATTR_RO(id_vendor),
};
static struct bus_type ipack_bus_type = { static struct bus_type ipack_bus_type = {
.name = "ipack", .name = "ipack",
.probe = ipack_bus_probe, .probe = ipack_bus_probe,
.match = ipack_bus_match, .match = ipack_bus_match,
.remove = ipack_bus_remove, .remove = ipack_bus_remove,
.dev_attrs = ipack_dev_attrs,
}; };
struct ipack_bus_device *ipack_bus_register(struct device *parent, int slots, struct ipack_bus_device *ipack_bus_register(struct device *parent, int slots,
@ -118,6 +164,23 @@ void ipack_driver_unregister(struct ipack_driver *edrv)
} }
EXPORT_SYMBOL_GPL(ipack_driver_unregister); EXPORT_SYMBOL_GPL(ipack_driver_unregister);
static void ipack_parse_id1(struct ipack_device *dev)
{
u8 *id = dev->id;
dev->id_vendor = id[4];
dev->id_device = id[5];
}
static void ipack_parse_id2(struct ipack_device *dev)
{
__be16 *id = (__be16 *) dev->id;
dev->id_vendor = ((be16_to_cpu(id[3]) & 0xff) << 16)
+ be16_to_cpu(id[4]);
dev->id_device = be16_to_cpu(id[5]);
}
static int ipack_device_read_id(struct ipack_device *dev) static int ipack_device_read_id(struct ipack_device *dev)
{ {
u8 __iomem *idmem; u8 __iomem *idmem;
@ -183,6 +246,16 @@ static int ipack_device_read_id(struct ipack_device *dev)
dev->id[i] = ioread8(idmem + i); dev->id[i] = ioread8(idmem + i);
} }
/* now we can finally work with the copy */
switch (dev->id_format) {
case IPACK_ID_VERSION_1:
ipack_parse_id1(dev);
break;
case IPACK_ID_VERSION_2:
ipack_parse_id2(dev);
break;
}
out: out:
dev->bus->ops->unmap_space(dev, IPACK_ID_SPACE); dev->bus->ops->unmap_space(dev, IPACK_ID_SPACE);

4
drivers/staging/ipack/ipack.h
View File

@ -74,8 +74,10 @@ struct ipack_device {
struct ipack_addr_space io_space; struct ipack_addr_space io_space;
struct ipack_addr_space mem_space; struct ipack_addr_space mem_space;
struct device dev; struct device dev;
unsigned char *id; u8 *id;
size_t id_avail; size_t id_avail;
u32 id_vendor;
u32 id_device;
u8 id_format; u8 id_format;
}; };