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pcmcia: add socket register data to sysfs for yenta devices 

It's simple, and it's a good debugging aid.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Linus Torvalds 2005-10-28 13:55:08 -07:00
parent 84860bf064
commit 030ee39c0f
1 changed files with 41 additions and 1 deletions
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42
drivers/pcmcia/yenta_socket.c
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@ -151,6 +151,40 @@ static void exca_writew(struct yenta_socket *socket, unsigned reg, u16 val)
readb(socket->base + 0x800 + reg + 1);
}
static ssize_t show_yenta_registers(struct device *yentadev, struct device_attribute *attr, char *buf)
{
struct pci_dev *dev = to_pci_dev(yentadev);
struct yenta_socket *socket = pci_get_drvdata(dev);
int offset = 0, i;
offset = snprintf(buf, PAGE_SIZE, "CB registers:");
for (i = 0; i < 0x24; i += 4) {
unsigned val;
if (!(i & 15))
offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
val = cb_readl(socket, i);
offset += snprintf(buf + offset, PAGE_SIZE - offset, " %08x", val);
}
offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n\nExCA registers:");
for (i = 0; i < 0x45; i++) {
unsigned char val;
if (!(i & 7)) {
if (i & 8) {
memcpy(buf + offset, " -", 2);
offset += 2;
} else
offset += snprintf(buf + offset, PAGE_SIZE - offset, "\n%02x:", i);
}
val = exca_readb(socket, i);
offset += snprintf(buf + offset, PAGE_SIZE - offset, " %02x", val);
}
buf[offset++] = '\n';
return offset;
}
static DEVICE_ATTR(yenta_registers, S_IRUSR, show_yenta_registers, NULL);
/*
* Ugh, mixed-mode cardbus and 16-bit pccard state: things depend
* on what kind of card is inserted..
@ -765,6 +799,9 @@ static void yenta_close(struct pci_dev *dev)
{
struct yenta_socket *sock = pci_get_drvdata(dev);
/* Remove the register attributes */
device_remove_file(&dev->dev, &dev_attr_yenta_registers);
/* we don't want a dying socket registered */
pcmcia_unregister_socket(&sock->socket);
@ -1138,8 +1175,11 @@ static int __devinit yenta_probe (struct pci_dev *dev, const struct pci_device_i
/* Register it with the pcmcia layer.. */
ret = pcmcia_register_socket(&socket->socket);
if (ret == 0)
if (ret == 0) {
/* Add the yenta register attributes */
device_create_file(&dev->dev, &dev_attr_yenta_registers);
goto out;
}
unmap:
iounmap(socket->base);