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authorSudeep Holla <sudeep.holla@arm.com>2016-02-19 16:01:18 +0000
committerJassi Brar <jaswinder.singh@linaro.org>2016-03-04 12:32:19 +0530
commit2d74ffdc910e06c407f0a3ace9795f77cc07d05b (patch)
tree6ad10150122a1dfd3c9d13df76afc0f32e39557f /drivers/mailbox/mailbox-test.c
parent27fa680f7f4143f1d04945dbcded0f52e26e5d56 (diff)
mailbox: mailbox-test: add support for separate tx/rx buffer with single channel
This patch adds support for different MMIO region for Tx and Rx paths. If only one region is specified, it's assumed to be shared between Rx and Tx, thereby retaining backward compatibility. Also in order to support single channel dealing with both Tx and Rx with dedicated MMIO regions, Tx channel itself is assigned to Rx if MMIO regions are different and Rx is not specified. Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Diffstat (limited to 'drivers/mailbox/mailbox-test.c')
-rw-r--r--drivers/mailbox/mailbox-test.c31
1 files changed, 21 insertions, 10 deletions
diff --git a/drivers/mailbox/mailbox-test.c b/drivers/mailbox/mailbox-test.c
index f690f11969a1..dc11bbf27274 100644
--- a/drivers/mailbox/mailbox-test.c
+++ b/drivers/mailbox/mailbox-test.c
@@ -31,7 +31,8 @@ static struct dentry *root_debugfs_dir;
struct mbox_test_device {
struct device *dev;
- void __iomem *mmio;
+ void __iomem *tx_mmio;
+ void __iomem *rx_mmio;
struct mbox_chan *tx_channel;
struct mbox_chan *rx_channel;
char *rx_buffer;
@@ -112,7 +113,7 @@ static ssize_t mbox_test_message_write(struct file *filp,
* A separate signal is only of use if there is
* MMIO to subsequently pass the message through
*/
- if (tdev->mmio && tdev->signal) {
+ if (tdev->tx_mmio && tdev->signal) {
print_hex_dump_bytes("Client: Sending: Signal: ", DUMP_PREFIX_ADDRESS,
tdev->signal, MBOX_MAX_SIG_LEN);
@@ -220,8 +221,8 @@ static void mbox_test_receive_message(struct mbox_client *client, void *message)
unsigned long flags;
spin_lock_irqsave(&tdev->lock, flags);
- if (tdev->mmio) {
- memcpy_fromio(tdev->rx_buffer, tdev->mmio, MBOX_MAX_MSG_LEN);
+ if (tdev->rx_mmio) {
+ memcpy_fromio(tdev->rx_buffer, tdev->rx_mmio, MBOX_MAX_MSG_LEN);
print_hex_dump_bytes("Client: Received [MMIO]: ", DUMP_PREFIX_ADDRESS,
tdev->rx_buffer, MBOX_MAX_MSG_LEN);
} else if (message) {
@@ -236,11 +237,11 @@ static void mbox_test_prepare_message(struct mbox_client *client, void *message)
{
struct mbox_test_device *tdev = dev_get_drvdata(client->dev);
- if (tdev->mmio) {
+ if (tdev->tx_mmio) {
if (tdev->signal)
- memcpy_toio(tdev->mmio, tdev->message, MBOX_MAX_MSG_LEN);
+ memcpy_toio(tdev->tx_mmio, tdev->message, MBOX_MAX_MSG_LEN);
else
- memcpy_toio(tdev->mmio, message, MBOX_MAX_MSG_LEN);
+ memcpy_toio(tdev->tx_mmio, message, MBOX_MAX_MSG_LEN);
}
}
@@ -294,9 +295,15 @@ static int mbox_test_probe(struct platform_device *pdev)
/* It's okay for MMIO to be NULL */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- tdev->mmio = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(tdev->mmio))
- tdev->mmio = NULL;
+ tdev->tx_mmio = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(tdev->tx_mmio))
+ tdev->tx_mmio = NULL;
+
+ /* If specified, second reg entry is Rx MMIO */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ tdev->rx_mmio = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(tdev->rx_mmio))
+ tdev->rx_mmio = tdev->tx_mmio;
tdev->tx_channel = mbox_test_request_channel(pdev, "tx");
tdev->rx_channel = mbox_test_request_channel(pdev, "rx");
@@ -304,6 +311,10 @@ static int mbox_test_probe(struct platform_device *pdev)
if (!tdev->tx_channel && !tdev->rx_channel)
return -EPROBE_DEFER;
+ /* If Rx is not specified but has Rx MMIO, then Rx = Tx */
+ if (!tdev->rx_channel && (tdev->rx_mmio != tdev->tx_mmio))
+ tdev->rx_channel = tdev->tx_channel;
+
tdev->dev = &pdev->dev;
platform_set_drvdata(pdev, tdev);

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