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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>
This commit is contained in:
Ryan Bradetich 2006-11-09 04:45:08 +00:00 committed by Kyle McMartin
parent c380f05726
commit 752b940359
1 changed files with 30 additions and 8 deletions
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38
drivers/serial/mux.c
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@ -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);
}