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authorRyan Bradetich <rbradetich@gmail.com>2006-11-09 04:45:08 +0000
committerKyle McMartin <kyle@ubuntu.com>2006-12-08 00:34:26 -0500
commit752b940359089ee1bcaceeb5c62d626a92586ba2 (patch)
tree7e9b5caf8ea4c384b251e6cce8fe9152b7d3b99c /drivers/serial
parentc380f057269686e17db74d360c923663889ac702 (diff)
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[PARISC] [MUX] Detect multiple cards in the correct order
This patch follows the example of the 8250_gsc driver by probing for specific built-in Mux cards first. This allows the system to preserve the correct detection order with multiple Mux cards. Signed-off-by: Ryan Bradetich <rbrad@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Diffstat (limited to 'drivers/serial')
-rw-r--r--drivers/serial/mux.c38
1 files changed, 30 insertions, 8 deletions
diff --git a/drivers/serial/mux.c b/drivers/serial/mux.c
index 5ff7e05..87269cc 100644
--- a/drivers/serial/mux.c
+++ b/drivers/serial/mux.c
@@ -453,7 +453,7 @@ static int __init mux_probe(struct parisc_device *dev)
}
port_count = GET_MUX_PORTS(iodc_data);
- printk(KERN_INFO "Serial mux driver (%d ports) Revision: 0.5\n", port_count);
+ printk(KERN_INFO "Serial mux driver (%d ports) Revision: 0.6\n", port_count);
dev_set_drvdata(&dev->dev, (void *)(long)port_count);
request_mem_region(dev->hpa.start + MUX_OFFSET,
@@ -491,6 +491,7 @@ static int __init mux_probe(struct parisc_device *dev)
*/
port->timeout = HZ / 50;
spin_lock_init(&port->lock);
+
status = uart_add_one_port(&mux_driver, port);
BUG_ON(status);
}
@@ -500,12 +501,9 @@ static int __init mux_probe(struct parisc_device *dev)
static int __devexit mux_remove(struct parisc_device *dev)
{
- int i;
+ int i, j;
int port_count = (long)dev_get_drvdata(&dev->dev);
- /* Delete the Mux timer. */
- del_timer(&mux_timer);
-
/* Find Port 0 for this card in the mux_ports list. */
for(i = 0; i < port_cnt; ++i) {
if(mux_ports[i].port.mapbase == dev->hpa.start + MUX_OFFSET)
@@ -514,7 +512,7 @@ static int __devexit mux_remove(struct parisc_device *dev)
BUG_ON(i + port_count > port_cnt);
/* Release the resources associated with each port on the device. */
- for(; i < port_count; ++i) {
+ for(j = 0; j < port_count; ++j, ++i) {
struct uart_port *port = &mux_ports[i].port;
uart_remove_one_port(&mux_driver, port);
@@ -526,13 +524,35 @@ static int __devexit mux_remove(struct parisc_device *dev)
return 0;
}
+/* Hack. This idea was taken from the 8250_gsc.c on how to properly order
+ * the serial port detection in the proper order. The idea is we always
+ * want the builtin mux to be detected before addin mux cards, so we
+ * specifically probe for the builtin mux cards first.
+ *
+ * This table only contains the parisc_device_id of known builtin mux
+ * devices. All other mux cards will be detected by the generic mux_tbl.
+ */
+static struct parisc_device_id builtin_mux_tbl[] = {
+ { HPHW_A_DIRECT, HVERSION_REV_ANY_ID, 0x15, 0x0000D }, /* All K-class */
+ { HPHW_A_DIRECT, HVERSION_REV_ANY_ID, 0x44, 0x0000D }, /* E35, E45, and E55 */
+ { 0, }
+};
+
static struct parisc_device_id mux_tbl[] = {
{ HPHW_A_DIRECT, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0000D },
{ 0, }
};
+MODULE_DEVICE_TABLE(parisc, builtin_mux_tbl);
MODULE_DEVICE_TABLE(parisc, mux_tbl);
+static struct parisc_driver builtin_serial_mux_driver = {
+ .name = "builtin_serial_mux",
+ .id_table = builtin_mux_tbl,
+ .probe = mux_probe,
+ .remove = __devexit_p(mux_remove),
+};
+
static struct parisc_driver serial_mux_driver = {
.name = "serial_mux",
.id_table = mux_tbl,
@@ -547,7 +567,8 @@ static struct parisc_driver serial_mux_driver = {
*/
static int __init mux_init(void)
{
- int status = register_parisc_driver(&serial_mux_driver);
+ register_parisc_driver(&builtin_serial_mux_driver);
+ register_parisc_driver(&serial_mux_driver);
if(port_cnt > 0) {
/* Start the Mux timer */
@@ -560,7 +581,7 @@ static int __init mux_init(void)
#endif
}
- return status;
+ return 0;
}
/**
@@ -578,6 +599,7 @@ static void __exit mux_exit(void)
#endif
}
+ unregister_parisc_driver(&builtin_serial_mux_driver);
unregister_parisc_driver(&serial_mux_driver);
uart_unregister_driver(&mux_driver);
}