Staging: ipack: Parse vendor and device id.
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>
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Родитель
187e478240
Коммит
e8ed3276c2
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@ -63,11 +63,57 @@ static int ipack_bus_remove(struct device *device)
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return 0;
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}
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#define ipack_device_attr(field, format_string) \
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static ssize_t \
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field##_show(struct device *dev, struct device_attribute *attr, \
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char *buf) \
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{ \
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struct ipack_device *idev = to_ipack_dev(dev); \
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return sprintf(buf, format_string, idev->field); \
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}
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static ssize_t
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id_vendor_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct ipack_device *idev = to_ipack_dev(dev);
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switch (idev->id_format) {
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case IPACK_ID_VERSION_1:
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return sprintf(buf, "0x%02x\n", idev->id_vendor);
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case IPACK_ID_VERSION_2:
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return sprintf(buf, "0x%06x\n", idev->id_vendor);
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default:
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return -EIO;
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}
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}
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static ssize_t
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id_device_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct ipack_device *idev = to_ipack_dev(dev);
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switch (idev->id_format) {
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case IPACK_ID_VERSION_1:
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return sprintf(buf, "0x%02x\n", idev->id_device);
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case IPACK_ID_VERSION_2:
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return sprintf(buf, "0x%04x\n", idev->id_device);
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default:
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return -EIO;
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}
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}
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ipack_device_attr(id_format, "0x%hhu\n");
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static struct device_attribute ipack_dev_attrs[] = {
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__ATTR_RO(id_device),
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__ATTR_RO(id_format),
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__ATTR_RO(id_vendor),
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};
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static struct bus_type ipack_bus_type = {
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.name = "ipack",
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.probe = ipack_bus_probe,
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.match = ipack_bus_match,
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.remove = ipack_bus_remove,
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.dev_attrs = ipack_dev_attrs,
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};
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struct ipack_bus_device *ipack_bus_register(struct device *parent, int slots,
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@ -118,6 +164,23 @@ void ipack_driver_unregister(struct ipack_driver *edrv)
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}
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EXPORT_SYMBOL_GPL(ipack_driver_unregister);
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static void ipack_parse_id1(struct ipack_device *dev)
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{
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u8 *id = dev->id;
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dev->id_vendor = id[4];
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dev->id_device = id[5];
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}
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static void ipack_parse_id2(struct ipack_device *dev)
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{
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__be16 *id = (__be16 *) dev->id;
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dev->id_vendor = ((be16_to_cpu(id[3]) & 0xff) << 16)
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+ be16_to_cpu(id[4]);
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dev->id_device = be16_to_cpu(id[5]);
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}
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static int ipack_device_read_id(struct ipack_device *dev)
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{
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u8 __iomem *idmem;
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@ -183,6 +246,16 @@ static int ipack_device_read_id(struct ipack_device *dev)
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dev->id[i] = ioread8(idmem + i);
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}
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/* now we can finally work with the copy */
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switch (dev->id_format) {
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case IPACK_ID_VERSION_1:
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ipack_parse_id1(dev);
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break;
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case IPACK_ID_VERSION_2:
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ipack_parse_id2(dev);
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break;
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}
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out:
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dev->bus->ops->unmap_space(dev, IPACK_ID_SPACE);
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@ -74,8 +74,10 @@ struct ipack_device {
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struct ipack_addr_space io_space;
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struct ipack_addr_space mem_space;
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struct device dev;
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unsigned char *id;
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u8 *id;
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size_t id_avail;
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u32 id_vendor;
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u32 id_device;
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u8 id_format;
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};
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