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libertas_spi: Add support for suspend/resume

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Add support for suspend/resume in if_spi.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vasily Khoruzhick 2011-03-16 16:41:46 +02:00 committed by John W. Linville
parent 5e6e3a92b9
commit f39de99254
1 changed files with 65 additions and 0 deletions
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65
drivers/net/wireless/libertas/if_spi.c
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@ -57,6 +57,7 @@ struct if_spi_card {
/* Handles all SPI communication (except for FW load) */
struct workqueue_struct *workqueue;
struct work_struct packet_work;
struct work_struct resume_work;
u8 cmd_buffer[IF_SPI_CMD_BUF_SIZE];
@ -68,6 +69,9 @@ struct if_spi_card {
/* Protects cmd_packet_list and data_packet_list */
spinlock_t buffer_lock;
/* True is card suspended */
u8 suspended;
};
static void free_if_spi_card(struct if_spi_card *card)
@ -1057,6 +1061,28 @@ out:
return err;
}
static void if_spi_resume_worker(struct work_struct *work)
{
struct if_spi_card *card;
card = container_of(work, struct if_spi_card, resume_work);
if (card->suspended) {
if (card->pdata->setup)
card->pdata->setup(card->spi);
/* Init card ... */
if_spi_init_card(card);
enable_irq(card->spi->irq);
/* And resume it ... */
lbs_resume(card->priv);
card->suspended = 0;
}
}
static int __devinit if_spi_probe(struct spi_device *spi)
{
struct if_spi_card *card;
@ -1107,6 +1133,7 @@ static int __devinit if_spi_probe(struct spi_device *spi)
goto free_card;
}
card->priv = priv;
priv->setup_fw_on_resume = 1;
priv->card = card;
priv->hw_host_to_card = if_spi_host_to_card;
priv->enter_deep_sleep = NULL;
@ -1117,6 +1144,7 @@ static int __devinit if_spi_probe(struct spi_device *spi)
/* Initialize interrupt handling stuff. */
card->workqueue = create_workqueue("libertas_spi");
INIT_WORK(&card->packet_work, if_spi_host_to_card_worker);
INIT_WORK(&card->resume_work, if_spi_resume_worker);
err = request_irq(spi->irq, if_spi_host_interrupt,
IRQF_TRIGGER_FALLING, "libertas_spi", card);
@ -1161,6 +1189,8 @@ static int __devexit libertas_spi_remove(struct spi_device *spi)
lbs_deb_spi("libertas_spi_remove\n");
lbs_deb_enter(LBS_DEB_SPI);
cancel_work_sync(&card->resume_work);
lbs_stop_card(priv);
lbs_remove_card(priv); /* will call free_netdev */
@ -1174,6 +1204,40 @@ static int __devexit libertas_spi_remove(struct spi_device *spi)
return 0;
}
static int if_spi_suspend(struct device *dev)
{
struct spi_device *spi = to_spi_device(dev);
struct if_spi_card *card = spi_get_drvdata(spi);
if (!card->suspended) {
lbs_suspend(card->priv);
flush_workqueue(card->workqueue);
disable_irq(spi->irq);
if (card->pdata->teardown)
card->pdata->teardown(spi);
card->suspended = 1;
}
return 0;
}
static int if_spi_resume(struct device *dev)
{
struct spi_device *spi = to_spi_device(dev);
struct if_spi_card *card = spi_get_drvdata(spi);
/* Schedule delayed work */
schedule_work(&card->resume_work);
return 0;
}
static const struct dev_pm_ops if_spi_pm_ops = {
.suspend = if_spi_suspend,
.resume = if_spi_resume,
};
static struct spi_driver libertas_spi_driver = {
.probe = if_spi_probe,
.remove = __devexit_p(libertas_spi_remove),
@ -1181,6 +1245,7 @@ static struct spi_driver libertas_spi_driver = {
.name = "libertas_spi",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
.pm = &if_spi_pm_ops,
},
};