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Commit c494bc6c authored by Dominik Brodowski's avatar Dominik Brodowski
Browse files

pcmcia serial_cs.c: fix multifunction card handling 



We shouldn't overwrite pre-set values, and we should also
set the port address to the beginning, and not the end of
the 8-port range.

CC: linux-serial@vger.kernel.org
Reported-by: default avatarKomuro <komurojun-mbn@nifty.com>
Hardware-supplied-by: default avatarJochen Frieling <j.frieling@pengutronix.de>
Tested-by: default avatarWolfram Sang <w.sang@pengutronix.de>
Signed-off-by: default avatarDominik Brodowski <linux@dominikbrodowski.net>
parent 49553c2e

drivers/serial/serial_cs.c

+36 −26
Original line number Diff line number Diff line
@@ -335,8 +335,6 @@ static int serial_probe(struct pcmcia_device *link) 
	info->p_dev = link;

	link->priv = info;



	link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;

	link->resource[0]->end = 8;

	link->conf.Attributes = CONF_ENABLE_IRQ;

	if (do_sound) {

		link->conf.Attributes |= CONF_ENABLE_SPKR;
@@ -411,6 +409,27 @@ static int setup_serial(struct pcmcia_device *handle, struct serial_info * info, 


/*====================================================================*/



static int pfc_config(struct pcmcia_device *p_dev)

{

	unsigned int port = 0;

	struct serial_info *info = p_dev->priv;



	if ((p_dev->resource[1]->end != 0) &&

		(resource_size(p_dev->resource[1]) == 8)) {

		port = p_dev->resource[1]->start;

		info->slave = 1;

	} else if ((info->manfid == MANFID_OSITECH) &&

		(resource_size(p_dev->resource[0]) == 0x40)) {

		port = p_dev->resource[0]->start + 0x28;

		info->slave = 1;

	}

	if (info->slave)

		return setup_serial(p_dev, info, port, p_dev->irq);



	dev_warn(&p_dev->dev, "no usable port range found, giving up\n");

	return -ENODEV;

}



static int simple_config_check(struct pcmcia_device *p_dev,

			       cistpl_cftable_entry_t *cf,

			       cistpl_cftable_entry_t *dflt,
@@ -461,23 +480,8 @@ static int simple_config(struct pcmcia_device *link) 
	struct serial_info *info = link->priv;

	int i = -ENODEV, try;



	/* If the card is already configured, look up the port and irq */

	if (link->function_config) {

		unsigned int port = 0;

		if ((link->resource[1]->end != 0) &&

			(resource_size(link->resource[1]) == 8)) {

			port = link->resource[1]->end;

			info->slave = 1;

		} else if ((info->manfid == MANFID_OSITECH) &&

			(resource_size(link->resource[0]) == 0x40)) {

			port = link->resource[0]->start + 0x28;

			info->slave = 1;

		}

		if (info->slave) {

			return setup_serial(link, info, port,

					    link->irq);

		}

	}

	link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;

	link->resource[0]->end = 8;



	/* First pass: look for a config entry that looks normal.

	 * Two tries: without IO aliases, then with aliases */
@@ -491,8 +495,7 @@ static int simple_config(struct pcmcia_device *link) 
	if (!pcmcia_loop_config(link, simple_config_check_notpicky, NULL))

		goto found_port;



	printk(KERN_NOTICE

	       "serial_cs: no usable port range found, giving up\n");

	dev_warn(&link->dev, "no usable port range found, giving up\n");

	return -1;



found_port:
@@ -558,6 +561,7 @@ static int multi_config(struct pcmcia_device *link) 
	int i, base2 = 0;



	/* First, look for a generic full-sized window */

	link->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;

	link->resource[0]->end = info->multi * 8;

	if (pcmcia_loop_config(link, multi_config_check, &base2)) {

		/* If that didn't work, look for two windows */
@@ -565,15 +569,14 @@ static int multi_config(struct pcmcia_device *link) 
		info->multi = 2;

		if (pcmcia_loop_config(link, multi_config_check_notpicky,

				       &base2)) {

			printk(KERN_NOTICE "serial_cs: no usable port range"

			dev_warn(&link->dev, "no usable port range "

			       "found, giving up\n");

			return -ENODEV;

		}

	}



	if (!link->irq)

		dev_warn(&link->dev,

			"serial_cs: no usable IRQ found, continuing...\n");

		dev_warn(&link->dev, "no usable IRQ found, continuing...\n");



	/*

	 * Apply any configuration quirks.
@@ -675,6 +678,7 @@ static int serial_config(struct pcmcia_device * link) 
	   multifunction cards that ask for appropriate IO port ranges */

	if ((info->multi == 0) &&

	    (link->has_func_id) &&

	    (link->socket->pcmcia_pfc == 0) &&

	    ((link->func_id == CISTPL_FUNCID_MULTI) ||

	     (link->func_id == CISTPL_FUNCID_SERIAL)))

		pcmcia_loop_config(link, serial_check_for_multi, info);
@@ -685,7 +689,13 @@ static int serial_config(struct pcmcia_device * link) 
	if (info->quirk && info->quirk->multi != -1)

		info->multi = info->quirk->multi;



	if (info->multi > 1)

	dev_info(&link->dev,

		"trying to set up [0x%04x:0x%04x] (pfc: %d, multi: %d, quirk: %p)\n",

		link->manf_id, link->card_id,

		link->socket->pcmcia_pfc, info->multi, info->quirk);

	if (link->socket->pcmcia_pfc)

		i = pfc_config(link);

	else if (info->multi > 1)

		i = multi_config(link);

	else

		i = simple_config(link);
@@ -704,7 +714,7 @@ static int serial_config(struct pcmcia_device * link) 
	return 0;



failed:

	dev_warn(&link->dev, "serial_cs: failed to initialize\n");

	dev_warn(&link->dev, "failed to initialize\n");

	serial_remove(link);

	return -ENODEV;

}