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authorBjorn Helgaas <bjorn.helgaas@hp.com>2008-06-27 18:57:01 -0400
committerAndi Kleen <andi@basil.nowhere.org>2008-07-16 17:27:06 -0400
commit57fd51a8be26921b56747ddd09d1d9e01c11c9e0 (patch)
tree8b34c3d57867a217cfabf09a73a1af19242bdc7b /drivers/serial/8250_pnp.c
parentf61ed7e32d2d6a0a8c3c101da513ccedd542e14d (diff)
PNP: add pnp_possible_config() -- can a device could be configured this way?
As part of a heuristic to identify modem devices, 8250_pnp.c checks to see whether a device can be configured at any of the legacy COM port addresses. This patch moves the code that traverses the PNP "possible resource options" from 8250_pnp.c to the PNP subsystem. This encapsulation is important because a future patch will change the implementation of those resource options. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Rene Herman <rene.herman@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/serial/8250_pnp.c')
-rw-r--r--drivers/serial/8250_pnp.c24
1 files changed, 7 insertions, 17 deletions
diff --git a/drivers/serial/8250_pnp.c b/drivers/serial/8250_pnp.c
index 97c68d021d28..638b68649e79 100644
--- a/drivers/serial/8250_pnp.c
+++ b/drivers/serial/8250_pnp.c
@@ -383,21 +383,14 @@ static int __devinit check_name(char *name)
383 return 0; 383 return 0;
384} 384}
385 385
386static int __devinit check_resources(struct pnp_option *option) 386static int __devinit check_resources(struct pnp_dev *dev)
387{ 387{
388 struct pnp_option *tmp; 388 resource_size_t base[] = {0x2f8, 0x3f8, 0x2e8, 0x3e8};
389 if (!option) 389 int i;
390 return 0;
391 390
392 for (tmp = option; tmp; tmp = tmp->next) { 391 for (i = 0; i < ARRAY_SIZE(base); i++) {
393 struct pnp_port *port; 392 if (pnp_possible_config(dev, IORESOURCE_IO, base[i], 8))
394 for (port = tmp->port; port; port = port->next) 393 return 1;
395 if ((port->size == 8) &&
396 ((port->min == 0x2f8) ||
397 (port->min == 0x3f8) ||
398 (port->min == 0x2e8) ||
399 (port->min == 0x3e8)))
400 return 1;
401 } 394 }
402 395
403 return 0; 396 return 0;
@@ -420,10 +413,7 @@ static int __devinit serial_pnp_guess_board(struct pnp_dev *dev, int *flags)
420 (dev->card && check_name(dev->card->name)))) 413 (dev->card && check_name(dev->card->name))))
421 return -ENODEV; 414 return -ENODEV;
422 415
423 if (check_resources(dev->independent)) 416 if (check_resources(dev))
424 return 0;
425
426 if (check_resources(dev->dependent))
427 return 0; 417 return 0;
428 418
429 return -ENODEV; 419 return -ENODEV;