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From cb10982feb7da52315426d1a9980d49482071bb0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
Date: Fri, 26 Jun 2015 14:26:10 +0200
Subject: [PATCH 115/171] firmware: bcm2835: Support legacy mailbox API
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Add support for the bcm_mailbox_*() functions.
This is temporary until all drivers have been converted to the
firmware API (rpi_firmware_property*()).
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
---
drivers/firmware/raspberrypi.c | 15 +++++++++++++--
include/soc/bcm2835/raspberrypi-firmware.h | 2 ++
2 files changed, 15 insertions(+), 2 deletions(-)
--- a/drivers/firmware/raspberrypi.c
+++ b/drivers/firmware/raspberrypi.c
@@ -19,6 +19,7 @@
#define MBOX_MSG(chan, data28) (((data28) & ~0xf) | ((chan) & 0xf))
#define MBOX_CHAN(msg) ((msg) & 0xf)
#define MBOX_DATA28(msg) ((msg) & ~0xf)
+#define MBOX_CHAN_VCHIQ 3
#define MBOX_CHAN_PROPERTY 8
struct rpi_firmware {
@@ -26,6 +27,7 @@ struct rpi_firmware {
struct mbox_chan *chan; /* The property channel. */
struct completion c;
u32 enabled;
+ u32 received;
};
static struct platform_device *g_pdev;
@@ -35,6 +37,7 @@ static DEFINE_MUTEX(transaction_lock);
static void response_callback(struct mbox_client *cl, void *msg)
{
struct rpi_firmware *fw = container_of(cl, struct rpi_firmware, cl);
+ fw->received = *(u32 *)msg;
complete(&fw->c);
}
@@ -42,7 +45,7 @@ static void response_callback(struct mbo
* Sends a request to the firmware through the BCM2835 mailbox driver,
* and synchronously waits for the reply.
*/
-static int
+int
rpi_firmware_transaction(struct rpi_firmware *fw, u32 chan, u32 data)
{
u32 message = MBOX_MSG(chan, data);
@@ -54,7 +57,8 @@ rpi_firmware_transaction(struct rpi_firm
reinit_completion(&fw->c);
ret = mbox_send_message(fw->chan, &message);
if (ret >= 0) {
- wait_for_completion(&fw->c);
+ if (chan != MBOX_CHAN_VCHIQ)
+ wait_for_completion(&fw->c);
ret = 0;
} else {
dev_err(fw->cl.dev, "mbox_send_message returned %d\n", ret);
@@ -63,6 +67,13 @@ rpi_firmware_transaction(struct rpi_firm
return ret;
}
+EXPORT_SYMBOL(rpi_firmware_transaction);
+
+u32 rpi_firmware_transaction_received(struct rpi_firmware *fw)
+{
+ return MBOX_DATA28(fw->received);
+}
+EXPORT_SYMBOL(rpi_firmware_transaction_received);
/**
* rpi_firmware_property_list - Submit firmware property list
--- a/include/soc/bcm2835/raspberrypi-firmware.h
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
@@ -116,6 +116,8 @@ enum rpi_firmware_property_tag {
RPI_FIRMWARE_GET_DMA_CHANNELS = 0x00060001,
};
+int rpi_firmware_transaction(struct rpi_firmware *fw, u32 chan, u32 data);
+u32 rpi_firmware_transaction_received(struct rpi_firmware *fw);
int rpi_firmware_property(struct rpi_firmware *fw,
u32 tag, void *data, size_t len);
int rpi_firmware_property_list(struct rpi_firmware *fw,
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