mmc: sdio: Export SDIO revision and info strings to userspace

For SDIO functions, SDIO cards and SD COMBO cards are exported revision
number and info strings from CISTPL_VERS_1 structure. Revision number
should indicate compliance of standard and info strings should contain
product information in same format as product information for PCMCIA cards.

Product information for PCMCIA cards should contain following strings in
this order: Manufacturer, Product Name, Lot number, Programming Conditions.

Note that not all SDIO cards export all those info strings in that order as
described in PCMCIA Metaformat Specification.

Signed-off-by: Pali Rohár <pali@kernel.org>
Link: https://lore.kernel.org/r/20200727133837.19086-5-pali@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index 2384829c8fb2..3d709029e07c 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -42,12 +42,36 @@ static DEVICE_ATTR_RO(field)
 sdio_config_attr(class, "0x%02x\n", func->class);
 sdio_config_attr(vendor, "0x%04x\n", func->vendor);
 sdio_config_attr(device, "0x%04x\n", func->device);
+sdio_config_attr(revision, "%u.%u\n", func->major_rev, func->minor_rev);
 sdio_config_attr(modalias, "sdio:c%02Xv%04Xd%04X\n", func->class, func->vendor, func->device);
 
+#define sdio_info_attr(num)									\
+static ssize_t info##num##_show(struct device *dev, struct device_attribute *attr, char *buf)	\
+{												\
+	struct sdio_func *func = dev_to_sdio_func(dev);						\
+												\
+	if (num > func->num_info)								\
+		return -ENODATA;								\
+	if (!func->info[num-1][0])								\
+		return 0;									\
+	return sprintf(buf, "%s\n", func->info[num-1]);						\
+}												\
+static DEVICE_ATTR_RO(info##num)
+
+sdio_info_attr(1);
+sdio_info_attr(2);
+sdio_info_attr(3);
+sdio_info_attr(4);
+
 static struct attribute *sdio_dev_attrs[] = {
 	&dev_attr_class.attr,
 	&dev_attr_vendor.attr,
 	&dev_attr_device.attr,
+	&dev_attr_revision.attr,
+	&dev_attr_info1.attr,
+	&dev_attr_info2.attr,
+	&dev_attr_info3.attr,
+	&dev_attr_info4.attr,
 	&dev_attr_modalias.attr,
 	NULL,
 };
@@ -98,6 +122,7 @@ static int
 sdio_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
 	struct sdio_func *func = dev_to_sdio_func(dev);
+	unsigned int i;
 
 	if (add_uevent_var(env,
 			"SDIO_CLASS=%02X", func->class))
@@ -108,6 +133,15 @@ sdio_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
 		return -ENOMEM;
 
 	if (add_uevent_var(env,
+			"SDIO_REVISION=%u.%u", func->major_rev, func->minor_rev))
+		return -ENOMEM;
+
+	for (i = 0; i < func->num_info; i++) {
+		if (add_uevent_var(env, "SDIO_INFO%u=%s", i+1, func->info[i]))
+			return -ENOMEM;
+	}
+
+	if (add_uevent_var(env,
 			"MODALIAS=sdio:c%02Xv%04Xd%04X",
 			func->class, func->vendor, func->device))
 		return -ENOMEM;