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89 lines
2.9 KiB
Diff
89 lines
2.9 KiB
Diff
From be083fb29207201d3db279f9d5654c5f8c2cb6de Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
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Date: Fri, 26 Jun 2015 14:26:10 +0200
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Subject: [PATCH 115/121] firmware: bcm2835: Support legacy mailbox API
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Add support for the bcm_mailbox_*() functions.
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This is temporary until all drivers have been converted to the
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firmware API (rpi_firmware_property*()).
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Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
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---
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drivers/firmware/raspberrypi.c | 15 +++++++++++++--
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include/soc/bcm2835/raspberrypi-firmware.h | 2 ++
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2 files changed, 15 insertions(+), 2 deletions(-)
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--- a/drivers/firmware/raspberrypi.c
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+++ b/drivers/firmware/raspberrypi.c
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@@ -19,6 +19,7 @@
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#define MBOX_MSG(chan, data28) (((data28) & ~0xf) | ((chan) & 0xf))
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#define MBOX_CHAN(msg) ((msg) & 0xf)
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#define MBOX_DATA28(msg) ((msg) & ~0xf)
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+#define MBOX_CHAN_VCHIQ 3
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#define MBOX_CHAN_PROPERTY 8
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struct rpi_firmware {
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@@ -26,6 +27,7 @@ struct rpi_firmware {
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struct mbox_chan *chan; /* The property channel. */
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struct completion c;
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u32 enabled;
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+ u32 received;
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};
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static struct platform_device *g_pdev;
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@@ -35,6 +37,7 @@ static DEFINE_MUTEX(transaction_lock);
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static void response_callback(struct mbox_client *cl, void *msg)
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{
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struct rpi_firmware *fw = container_of(cl, struct rpi_firmware, cl);
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+ fw->received = *(u32 *)msg;
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complete(&fw->c);
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}
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@@ -42,7 +45,7 @@ static void response_callback(struct mbo
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* Sends a request to the firmware through the BCM2835 mailbox driver,
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* and synchronously waits for the reply.
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*/
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-static int
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+int
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rpi_firmware_transaction(struct rpi_firmware *fw, u32 chan, u32 data)
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{
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u32 message = MBOX_MSG(chan, data);
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@@ -54,7 +57,8 @@ rpi_firmware_transaction(struct rpi_firm
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reinit_completion(&fw->c);
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ret = mbox_send_message(fw->chan, &message);
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if (ret >= 0) {
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- wait_for_completion(&fw->c);
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+ if (chan != MBOX_CHAN_VCHIQ)
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+ wait_for_completion(&fw->c);
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ret = 0;
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} else {
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dev_err(fw->cl.dev, "mbox_send_message returned %d\n", ret);
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@@ -63,6 +67,13 @@ rpi_firmware_transaction(struct rpi_firm
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return ret;
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}
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+EXPORT_SYMBOL(rpi_firmware_transaction);
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+
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+u32 rpi_firmware_transaction_received(struct rpi_firmware *fw)
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+{
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+ return MBOX_DATA28(fw->received);
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+}
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+EXPORT_SYMBOL(rpi_firmware_transaction_received);
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/**
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* rpi_firmware_property_list - Submit firmware property list
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--- a/include/soc/bcm2835/raspberrypi-firmware.h
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+++ b/include/soc/bcm2835/raspberrypi-firmware.h
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@@ -116,6 +116,8 @@ enum rpi_firmware_property_tag {
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RPI_FIRMWARE_GET_DMA_CHANNELS = 0x00060001,
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};
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+int rpi_firmware_transaction(struct rpi_firmware *fw, u32 chan, u32 data);
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+u32 rpi_firmware_transaction_received(struct rpi_firmware *fw);
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int rpi_firmware_property(struct rpi_firmware *fw,
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u32 tag, void *data, size_t len);
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int rpi_firmware_property_list(struct rpi_firmware *fw,
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