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authorMichael Grzeschik <m.grzeschik@pengutronix.de>2014-09-18 02:12:50 +0400
committerMichael Grzeschik <m.grzeschik@pengutronix.de>2015-10-26 11:10:56 +0300
commit5ef216c1f84825c6942fdd6c24d12a08ac2df135 (patch)
tree401f8c91fa1613f17c74f121135da9c651630813 /drivers/net/arcnet
parentae8ede6a0cdcf3b21596f44dff30bbd02265bb41 (diff)
downloadlinux-5ef216c1f84825c6942fdd6c24d12a08ac2df135.tar.xz
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>
Diffstat (limited to 'drivers/net/arcnet')
-rw-r--r--drivers/net/arcnet/com20020-pci.c33
-rw-r--r--drivers/net/arcnet/com20020.h4
2 files changed, 37 insertions, 0 deletions
diff --git a/drivers/net/arcnet/com20020-pci.c b/drivers/net/arcnet/com20020-pci.c
index e3b7c14e619f..637a6110cec6 100644
--- a/drivers/net/arcnet/com20020-pci.c
+++ b/drivers/net/arcnet/com20020-pci.c
@@ -68,6 +68,7 @@ static int com20020pci_probe(struct pci_dev *pdev,
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 @@ static int com20020pci_probe(struct pci_dev *pdev,
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 @@ static int com20020pci_probe(struct pci_dev *pdev,
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 @@ static struct com20020_pci_card_info card_info_eae_arc1 = {
.size = 0x08,
},
},
+ .misc_map = {
+ .bar = 2,
+ .offset = 0x10,
+ .size = 0x04,
+ },
+ .rotary = 0x0,
.flags = ARC_CAN_10MBIT,
};
@@ -252,6 +279,12 @@ static struct com20020_pci_card_info card_info_eae_ma1 = {
.size = 0x08,
}
},
+ .misc_map = {
+ .bar = 2,
+ .offset = 0x10,
+ .size = 0x04,
+ },
+ .rotary = 0x0,
.flags = ARC_CAN_10MBIT,
};
diff --git a/drivers/net/arcnet/com20020.h b/drivers/net/arcnet/com20020.h
index 22a460f39fb9..f2ed2eff3ae3 100644
--- a/drivers/net/arcnet/com20020.h
+++ b/drivers/net/arcnet/com20020.h
@@ -47,6 +47,9 @@ struct com20020_pci_card_info {
int devcount;
struct com20020_pci_channel_map chan_map_tbl[PLX_PCI_MAX_CARDS];
+ struct com20020_pci_channel_map misc_map;
+
+ int rotary;
unsigned int flags;
};
@@ -54,6 +57,7 @@ struct com20020_pci_card_info {
struct com20020_priv {
struct com20020_pci_card_info *ci;
struct list_head list_dev;
+ resource_size_t misc;
};
struct com20020_dev {