ALSA: bebob: Send a cue to load firmware for M-Audio Firewire series

Just powering on, these devices below wait to download firmware.
 - Firewire Audiophile
 - Firewire 410
 - Firewire 1814
 - ProjectMix I/O

But firmware version 5058 or later, flash memory in the device stores the
firmware. So this driver can enable these devices by sending a certain cue to
load the firmware.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 64 insertions, 0 deletions

diff --git a/sound/firewire/bebob/bebob_maudio.c b/sound/firewire/bebob/bebob_maudio.c
index 544094b22c6d..52b1a40e5e13 100644
--- a/sound/firewire/bebob/bebob_maudio.c
+++ b/sound/firewire/bebob/bebob_maudio.c
@@ -16,6 +16,10 @@
  * settings when completing uploading. Then these devices generate bus reset
  * and are recognized as new devices with the firmware.
  *
+ * But with firmware version 5058 or later, the firmware is stored to flash
+ * memory in the device and drivers can tell bootloader to load the firmware
+ * by sending a cue. This cue must be sent one time.
+ *
  * For streaming, both of output and input streams are needed for Firewire 410
  * and Ozonic. The single stream is OK for the other devices even if the clock
  * source is not SYT-Match (I note no devices use SYT-Match).
@@ -31,6 +35,20 @@
  * functionality is between 0xffc700700000 to 0xffc70070009c.
  */
 
+/* Offset from information register */
+#define INFO_OFFSET_SW_DATE	0x20
+
+/* Bootloader Protocol Version 1 */
+#define MAUDIO_BOOTLOADER_CUE1	0x00000001
+/*
+ * Initializing configuration to factory settings (= 0x1101), (swapped in line),
+ * Command code is zero (= 0x00),
+ * the number of operands is zero (= 0x00)(at least significant byte)
+ */
+#define MAUDIO_BOOTLOADER_CUE2	0x01110000
+/* padding */
+#define MAUDIO_BOOTLOADER_CUE3	0x00000000
+
 #define MAUDIO_SPECIFIC_ADDRESS	0xffc700000000
 
 #define METER_OFFSET		0x00600000
@@ -67,6 +85,52 @@ struct special_params {
 	struct snd_ctl_elem_id *ctl_id_sync;
 };
 
+/*
+ * For some M-Audio devices, this module just send cue to load firmware. After
+ * loading, the device generates bus reset and newly detected.
+ *
+ * If we make any transactions to load firmware, the operation may failed.
+ */
+int snd_bebob_maudio_load_firmware(struct fw_unit *unit)
+{
+	struct fw_device *device = fw_parent_device(unit);
+	int err, rcode;
+	u64 date;
+	__be32 cues[3] = {
+		MAUDIO_BOOTLOADER_CUE1,
+		MAUDIO_BOOTLOADER_CUE2,
+		MAUDIO_BOOTLOADER_CUE3
+	};
+
+	/* check date of software used to build */
+	err = snd_bebob_read_block(unit, INFO_OFFSET_SW_DATE,
+				   &date, sizeof(u64));
+	if (err < 0)
+		goto end;
+	/*
+	 * firmware version 5058 or later has date later than "20070401", but
+	 * 'date' is not null-terminated.
+	 */
+	if (date < 0x3230303730343031) {
+		dev_err(&unit->device,
+			"Use firmware version 5058 or later\n");
+		err = -ENOSYS;
+		goto end;
+	}
+
+	rcode = fw_run_transaction(device->card, TCODE_WRITE_BLOCK_REQUEST,
+				   device->node_id, device->generation,
+				   device->max_speed, BEBOB_ADDR_REG_REQ,
+				   cues, sizeof(cues));
+	if (rcode != RCODE_COMPLETE) {
+		dev_err(&unit->device,
+			"Failed to send a cue to load firmware\n");
+		err = -EIO;
+	}
+end:
+	return err;
+}
+
 static inline int
 get_meter(struct snd_bebob *bebob, void *buf, unsigned int size)
 {