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authorAlexandre Bounine <alexandre.bounine@idt.com>2016-03-22 14:26:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-22 15:36:02 -0700
commite3dd8cd4778ebc75c654f73d8673281078c81ed9 (patch)
tree361fad4c972f69069d9815f45a184a0a4a74bf5e
parent83dc2cbc1136108068637d5c98636647f7b82461 (diff)
downloadop-kernel-dev-e3dd8cd4778ebc75c654f73d8673281078c81ed9.zip
op-kernel-dev-e3dd8cd4778ebc75c654f73d8673281078c81ed9.tar.gz
rapidio/tsi721: add shutdown notification callback
Add device driver specific shutdown notification callback. Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/rapidio/devices/tsi721.c15
-rw-r--r--drivers/rapidio/devices/tsi721.h3
-rw-r--r--drivers/rapidio/devices/tsi721_dma.c30
3 files changed, 48 insertions, 0 deletions
diff --git a/drivers/rapidio/devices/tsi721.c b/drivers/rapidio/devices/tsi721.c
index cd40f0f..1fc9663 100644
--- a/drivers/rapidio/devices/tsi721.c
+++ b/drivers/rapidio/devices/tsi721.c
@@ -2638,6 +2638,8 @@ static int tsi721_probe(struct pci_dev *pdev,
if (err)
goto err_free_consistent;
+ pci_set_drvdata(pdev, priv);
+
return 0;
err_free_consistent:
@@ -2660,6 +2662,18 @@ err_exit:
return err;
}
+static void tsi721_shutdown(struct pci_dev *pdev)
+{
+ struct tsi721_device *priv = pci_get_drvdata(pdev);
+
+ dev_dbg(&pdev->dev, "RIO: %s\n", __func__);
+
+ tsi721_disable_ints(priv);
+ tsi721_dma_stop_all(priv);
+ pci_clear_master(pdev);
+ pci_disable_device(pdev);
+}
+
static const struct pci_device_id tsi721_pci_tbl[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_IDT, PCI_DEVICE_ID_TSI721) },
{ 0, } /* terminate list */
@@ -2671,6 +2685,7 @@ static struct pci_driver tsi721_driver = {
.name = "tsi721",
.id_table = tsi721_pci_tbl,
.probe = tsi721_probe,
+ .shutdown = tsi721_shutdown,
};
static int __init tsi721_init(void)
diff --git a/drivers/rapidio/devices/tsi721.h b/drivers/rapidio/devices/tsi721.h
index d675a44..ce2fb11 100644
--- a/drivers/rapidio/devices/tsi721.h
+++ b/drivers/rapidio/devices/tsi721.h
@@ -866,6 +866,9 @@ struct tsi721_device {
#ifdef CONFIG_RAPIDIO_DMA_ENGINE
extern void tsi721_bdma_handler(struct tsi721_bdma_chan *bdma_chan);
extern int tsi721_register_dma(struct tsi721_device *priv);
+extern void tsi721_dma_stop_all(struct tsi721_device *priv);
+#else
+#define tsi721_dma_stop_all(priv) do {} while (0)
#endif
#endif
diff --git a/drivers/rapidio/devices/tsi721_dma.c b/drivers/rapidio/devices/tsi721_dma.c
index 500e1e0..b490ec3 100644
--- a/drivers/rapidio/devices/tsi721_dma.c
+++ b/drivers/rapidio/devices/tsi721_dma.c
@@ -852,6 +852,36 @@ static int tsi721_terminate_all(struct dma_chan *dchan)
return 0;
}
+static void tsi721_dma_stop(struct tsi721_bdma_chan *bdma_chan)
+{
+ if (!bdma_chan->active)
+ return;
+ spin_lock_bh(&bdma_chan->lock);
+ if (!tsi721_dma_is_idle(bdma_chan)) {
+ int timeout = 100000;
+
+ /* stop the transfer in progress */
+ iowrite32(TSI721_DMAC_CTL_SUSP,
+ bdma_chan->regs + TSI721_DMAC_CTL);
+
+ /* Wait until DMA channel stops */
+ while (!tsi721_dma_is_idle(bdma_chan) && --timeout)
+ udelay(1);
+ }
+
+ spin_unlock_bh(&bdma_chan->lock);
+}
+
+void tsi721_dma_stop_all(struct tsi721_device *priv)
+{
+ int i;
+
+ for (i = 0; i < TSI721_DMA_MAXCH; i++) {
+ if (i != TSI721_DMACH_MAINT)
+ tsi721_dma_stop(&priv->bdma[i]);
+ }
+}
+
int tsi721_register_dma(struct tsi721_device *priv)
{
int i;
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