Add support for suspend/resume in if_spi.
Signed-off-by: Vasily Khoruzhick <anarsoul@xxxxxxxxx>
---
drivers/net/wireless/libertas/if_spi.c | 65 ++++++++++++++++++++++++++++++++
1 files changed, 65 insertions(+), 0 deletions(-)
diff --git a/drivers/net/wireless/libertas/if_spi.c b/drivers/net/wireless/libertas/if_spi.c
index f6c2cd6..078ef43 100644
--- a/drivers/net/wireless/libertas/if_spi.c
+++ b/drivers/net/wireless/libertas/if_spi.c
@@ -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,
},
};
--
1.7.4.1
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