arcnet: com20020-pci: add rotary index support
The EAE PLX-PCI card has a special rotary encoder
to configure the address of every card individually.
We take this information for the initial setup of
the cards dev_id.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
diff --git a/drivers/net/arcnet/com20020-pci.c b/drivers/net/arcnet/com20020-pci.c
index e3b7c14..637a611 100644
--- a/drivers/net/arcnet/com20020-pci.c
+++ b/drivers/net/arcnet/com20020-pci.c
@@ -68,6 +68,7 @@
const struct pci_device_id *id)
{
struct com20020_pci_card_info *ci;
+ struct com20020_pci_channel_map *mm;
struct net_device *dev;
struct arcnet_local *lp;
struct com20020_priv *priv;
@@ -84,9 +85,22 @@
ci = (struct com20020_pci_card_info *)id->driver_data;
priv->ci = ci;
+ mm = &ci->misc_map;
INIT_LIST_HEAD(&priv->list_dev);
+ if (mm->size) {
+ ioaddr = pci_resource_start(pdev, mm->bar) + mm->offset;
+ r = devm_request_region(&pdev->dev, ioaddr, mm->size,
+ "com20020-pci");
+ if (!r) {
+ pr_err("IO region %xh-%xh already allocated.\n",
+ ioaddr, ioaddr + mm->size - 1);
+ return -EBUSY;
+ }
+ priv->misc = ioaddr;
+ }
+
for (i = 0; i < ci->devcount; i++) {
struct com20020_pci_channel_map *cm = &ci->chan_map_tbl[i];
struct com20020_dev *card;
@@ -132,6 +146,13 @@
lp->timeout = timeout;
lp->hw.owner = THIS_MODULE;
+ /* Get the dev_id from the PLX rotary coder */
+ if (!strncmp(ci->name, "EAE PLX-PCI MA1", 15))
+ dev->dev_id = 0xc;
+ dev->dev_id ^= inb(priv->misc + ci->rotary) >> 4;
+
+ snprintf(dev->name, sizeof(dev->name), "arc%d-%d", dev->dev_id, i);
+
if (arcnet_inb(ioaddr, COM20020_REG_R_STATUS) == 0xFF) {
pr_err("IO address %Xh is empty!\n", ioaddr);
ret = -EIO;
@@ -235,6 +256,12 @@
.size = 0x08,
},
},
+ .misc_map = {
+ .bar = 2,
+ .offset = 0x10,
+ .size = 0x04,
+ },
+ .rotary = 0x0,
.flags = ARC_CAN_10MBIT,
};
@@ -252,6 +279,12 @@
.size = 0x08,
}
},
+ .misc_map = {
+ .bar = 2,
+ .offset = 0x10,
+ .size = 0x04,
+ },
+ .rotary = 0x0,
.flags = ARC_CAN_10MBIT,
};