target/linux/brcm2708/patches-4.1/0115-firmware-bcm2835-Support-legacy-mailbox-API.patch

   1 From be083fb29207201d3db279f9d5654c5f8c2cb6de Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
   3 Date: Fri, 26 Jun 2015 14:26:10 +0200
   4 Subject: [PATCH 115/121] firmware: bcm2835: Support legacy mailbox API
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 Add support for the bcm_mailbox_*() functions.
  10 This is temporary until all drivers have been converted to the
  11 firmware API (rpi_firmware_property*()).
  12
  13 Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
  14 ---
  15  drivers/firmware/raspberrypi.c             | 15 +++++++++++++--
  16  include/soc/bcm2835/raspberrypi-firmware.h |  2 ++
  17  2 files changed, 15 insertions(+), 2 deletions(-)
  18
  19 --- a/drivers/firmware/raspberrypi.c
  20 +++ b/drivers/firmware/raspberrypi.c
  21 @@ -19,6 +19,7 @@
  22  #define MBOX_MSG(chan, data28)         (((data28) & ~0xf) | ((chan) & 0xf))
  23  #define MBOX_CHAN(msg)                 ((msg) & 0xf)
  24  #define MBOX_DATA28(msg)               ((msg) & ~0xf)
  25 +#define MBOX_CHAN_VCHIQ                        3
  26  #define MBOX_CHAN_PROPERTY             8
  27
  28  struct rpi_firmware {
  29 @@ -26,6 +27,7 @@ struct rpi_firmware {
  30         struct mbox_chan *chan; /* The property channel. */
  31         struct completion c;
  32         u32 enabled;
  33 +       u32 received;
  34  };
  35
  36  static struct platform_device *g_pdev;
  37 @@ -35,6 +37,7 @@ static DEFINE_MUTEX(transaction_lock);
  38  static void response_callback(struct mbox_client *cl, void *msg)
  39  {
  40         struct rpi_firmware *fw = container_of(cl, struct rpi_firmware, cl);
  41 +       fw->received = *(u32 *)msg;
  42         complete(&fw->c);
  43  }
  44
  45 @@ -42,7 +45,7 @@ static void response_callback(struct mbo
  46   * Sends a request to the firmware through the BCM2835 mailbox driver,
  47   * and synchronously waits for the reply.
  48   */
  49 -static int
  50 +int
  51  rpi_firmware_transaction(struct rpi_firmware *fw, u32 chan, u32 data)
  52  {
  53         u32 message = MBOX_MSG(chan, data);
  54 @@ -54,7 +57,8 @@ rpi_firmware_transaction(struct rpi_firm
  55         reinit_completion(&fw->c);
  56         ret = mbox_send_message(fw->chan, &message);
  57         if (ret >= 0) {
  58 -               wait_for_completion(&fw->c);
  59 +               if (chan != MBOX_CHAN_VCHIQ)
  60 +                       wait_for_completion(&fw->c);
  61                 ret = 0;
  62         } else {
  63                 dev_err(fw->cl.dev, "mbox_send_message returned %d\n", ret);
  64 @@ -63,6 +67,13 @@ rpi_firmware_transaction(struct rpi_firm
  65
  66         return ret;
  67  }
  68 +EXPORT_SYMBOL(rpi_firmware_transaction);
  69 +
  70 +u32 rpi_firmware_transaction_received(struct rpi_firmware *fw)
  71 +{
  72 +       return MBOX_DATA28(fw->received);
  73 +}
  74 +EXPORT_SYMBOL(rpi_firmware_transaction_received);
  75
  76  /**
  77   * rpi_firmware_property_list - Submit firmware property list
  78 --- a/include/soc/bcm2835/raspberrypi-firmware.h
  79 +++ b/include/soc/bcm2835/raspberrypi-firmware.h
  80 @@ -116,6 +116,8 @@ enum rpi_firmware_property_tag {
  81         RPI_FIRMWARE_GET_DMA_CHANNELS =                       0x00060001,
  82  };
  83
  84 +int rpi_firmware_transaction(struct rpi_firmware *fw, u32 chan, u32 data);
  85 +u32 rpi_firmware_transaction_received(struct rpi_firmware *fw);
  86  int rpi_firmware_property(struct rpi_firmware *fw,
  87                           u32 tag, void *data, size_t len);
  88  int rpi_firmware_property_list(struct rpi_firmware *fw,