Bluetooth: Add firmware support for Atheros 3012

Blacklisted AR3012 PID in btusb and added the same
in ath3k to load patch and sysconfig files.

Signed-off-by: Bala Shanmugam <sbalashanmugam@atheros.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

2 files changed, 282 insertions, 0 deletions

diff --git a/drivers/bluetooth/ath3k.c b/drivers/bluetooth/ath3k.c
index 41dadac..e6acaba 100644
--- a/drivers/bluetooth/ath3k.c
+++ b/drivers/bluetooth/ath3k.c
@@ -31,6 +31,30 @@
 
 #define VERSION "1.0"
 
+#define ATH3K_DNLOAD				0x01
+#define ATH3K_GETSTATE				0x05
+#define ATH3K_SET_NORMAL_MODE			0x07
+#define ATH3K_GETVERSION			0x09
+#define USB_REG_SWITCH_VID_PID			0x0a
+
+#define ATH3K_MODE_MASK				0x3F
+#define ATH3K_NORMAL_MODE			0x0E
+
+#define ATH3K_PATCH_UPDATE			0x80
+#define ATH3K_SYSCFG_UPDATE			0x40
+
+#define ATH3K_XTAL_FREQ_26M			0x00
+#define ATH3K_XTAL_FREQ_40M			0x01
+#define ATH3K_XTAL_FREQ_19P2			0x02
+#define ATH3K_NAME_LEN				0xFF
+
+struct ath3k_version {
+	unsigned int	rom_version;
+	unsigned int	build_version;
+	unsigned int	ram_version;
+	unsigned char	ref_clock;
+	unsigned char	reserved[0x07];
+};
 
 static struct usb_device_id ath3k_table[] = {
 	/* Atheros AR3011 */
@@ -41,13 +65,29 @@ static struct usb_device_id ath3k_table[] = {
 
 	/* Atheros AR9285 Malbec with sflash firmware */
 	{ USB_DEVICE(0x03F0, 0x311D) },
+
+	/* Atheros AR3012 with sflash firmware*/
+	{ USB_DEVICE(0x0CF3, 0x3004) },
+
 	{ }	/* Terminating entry */
 };
 
 MODULE_DEVICE_TABLE(usb, ath3k_table);
 
+#define BTUSB_ATH3012		0x80
+/* This table is to load patch and sysconfig files
+ * for AR3012 */
+static struct usb_device_id ath3k_blist_tbl[] = {
+
+	/* Atheros AR3012 with sflash firmware*/
+	{ USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_ATH3012 },
+
+	{ }	/* Terminating entry */
+};
+
 #define USB_REQ_DFU_DNLOAD	1
 #define BULK_SIZE		4096
+#define FW_HDR_SIZE		20
 
 static int ath3k_load_firmware(struct usb_device *udev,
 				const struct firmware *firmware)
@@ -103,6 +143,215 @@ error:
 	return err;
 }
 
+static int ath3k_get_state(struct usb_device *udev, unsigned char *state)
+{
+	int pipe = 0;
+
+	pipe = usb_rcvctrlpipe(udev, 0);
+	return usb_control_msg(udev, pipe, ATH3K_GETSTATE,
+			USB_TYPE_VENDOR | USB_DIR_IN, 0, 0,
+			state, 0x01, USB_CTRL_SET_TIMEOUT);
+}
+
+static int ath3k_get_version(struct usb_device *udev,
+			struct ath3k_version *version)
+{
+	int pipe = 0;
+
+	pipe = usb_rcvctrlpipe(udev, 0);
+	return usb_control_msg(udev, pipe, ATH3K_GETVERSION,
+			USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, version,
+			sizeof(struct ath3k_version),
+			USB_CTRL_SET_TIMEOUT);
+}
+
+static int ath3k_load_fwfile(struct usb_device *udev,
+		const struct firmware *firmware)
+{
+	u8 *send_buf;
+	int err, pipe, len, size, count, sent = 0;
+	int ret;
+
+	count = firmware->size;
+
+	send_buf = kmalloc(BULK_SIZE, GFP_ATOMIC);
+	if (!send_buf) {
+		BT_ERR("Can't allocate memory chunk for firmware");
+		return -ENOMEM;
+	}
+
+	size = min_t(uint, count, FW_HDR_SIZE);
+	memcpy(send_buf, firmware->data, size);
+
+	pipe = usb_sndctrlpipe(udev, 0);
+	ret = usb_control_msg(udev, pipe, ATH3K_DNLOAD,
+			USB_TYPE_VENDOR, 0, 0, send_buf,
+			size, USB_CTRL_SET_TIMEOUT);
+	if (ret < 0) {
+		BT_ERR("Can't change to loading configuration err");
+		kfree(send_buf);
+		return ret;
+	}
+
+	sent += size;
+	count -= size;
+
+	while (count) {
+		size = min_t(uint, count, BULK_SIZE);
+		pipe = usb_sndbulkpipe(udev, 0x02);
+
+		memcpy(send_buf, firmware->data + sent, size);
+
+		err = usb_bulk_msg(udev, pipe, send_buf, size,
+					&len, 3000);
+		if (err || (len != size)) {
+			BT_ERR("Error in firmware loading err = %d,"
+				"len = %d, size = %d", err, len, size);
+			kfree(send_buf);
+			return err;
+		}
+		sent  += size;
+		count -= size;
+	}
+
+	kfree(send_buf);
+	return 0;
+}
+
+static int ath3k_switch_pid(struct usb_device *udev)
+{
+	int pipe = 0;
+
+	pipe = usb_sndctrlpipe(udev, 0);
+	return usb_control_msg(udev, pipe, USB_REG_SWITCH_VID_PID,
+			USB_TYPE_VENDOR, 0, 0,
+			NULL, 0, USB_CTRL_SET_TIMEOUT);
+}
+
+static int ath3k_set_normal_mode(struct usb_device *udev)
+{
+	unsigned char fw_state;
+	int pipe = 0, ret;
+
+	ret = ath3k_get_state(udev, &fw_state);
+	if (ret < 0) {
+		BT_ERR("Can't get state to change to normal mode err");
+		return ret;
+	}
+
+	if ((fw_state & ATH3K_MODE_MASK) == ATH3K_NORMAL_MODE) {
+		BT_DBG("firmware was already in normal mode");
+		return 0;
+	}
+
+	pipe = usb_sndctrlpipe(udev, 0);
+	return usb_control_msg(udev, pipe, ATH3K_SET_NORMAL_MODE,
+			USB_TYPE_VENDOR, 0, 0,
+			NULL, 0, USB_CTRL_SET_TIMEOUT);
+}
+
+static int ath3k_load_patch(struct usb_device *udev)
+{
+	unsigned char fw_state;
+	char filename[ATH3K_NAME_LEN] = {0};
+	const struct firmware *firmware;
+	struct ath3k_version fw_version, pt_version;
+	int ret;
+
+	ret = ath3k_get_state(udev, &fw_state);
+	if (ret < 0) {
+		BT_ERR("Can't get state to change to load ram patch err");
+		return ret;
+	}
+
+	if (fw_state & ATH3K_PATCH_UPDATE) {
+		BT_DBG("Patch was already downloaded");
+		return 0;
+	}
+
+	ret = ath3k_get_version(udev, &fw_version);
+	if (ret < 0) {
+		BT_ERR("Can't get version to change to load ram patch err");
+		return ret;
+	}
+
+	snprintf(filename, ATH3K_NAME_LEN, "ar3k/AthrBT_0x%08x.dfu",
+		fw_version.rom_version);
+
+	ret = request_firmware(&firmware, filename, &udev->dev);
+	if (ret < 0) {
+		BT_ERR("Patch file not found %s", filename);
+		return ret;
+	}
+
+	pt_version.rom_version = *(int *)(firmware->data + firmware->size - 8);
+	pt_version.build_version = *(int *)
+		(firmware->data + firmware->size - 4);
+
+	if ((pt_version.rom_version != fw_version.rom_version) ||
+		(pt_version.build_version <= fw_version.build_version)) {
+		BT_ERR("Patch file version did not match with firmware");
+		release_firmware(firmware);
+		return -EINVAL;
+	}
+
+	ret = ath3k_load_fwfile(udev, firmware);
+	release_firmware(firmware);
+
+	return ret;
+}
+
+static int ath3k_load_syscfg(struct usb_device *udev)
+{
+	unsigned char fw_state;
+	char filename[ATH3K_NAME_LEN] = {0};
+	const struct firmware *firmware;
+	struct ath3k_version fw_version;
+	int clk_value, ret;
+
+	ret = ath3k_get_state(udev, &fw_state);
+	if (ret < 0) {
+		BT_ERR("Can't get state to change to load configration err");
+		return -EBUSY;
+	}
+
+	ret = ath3k_get_version(udev, &fw_version);
+	if (ret < 0) {
+		BT_ERR("Can't get version to change to load ram patch err");
+		return ret;
+	}
+
+	switch (fw_version.ref_clock) {
+
+	case ATH3K_XTAL_FREQ_26M:
+		clk_value = 26;
+		break;
+	case ATH3K_XTAL_FREQ_40M:
+		clk_value = 40;
+		break;
+	case ATH3K_XTAL_FREQ_19P2:
+		clk_value = 19;
+		break;
+	default:
+		clk_value = 0;
+		break;
+	}
+
+	snprintf(filename, ATH3K_NAME_LEN, "ar3k/ramps_0x%08x_%d%s",
+		fw_version.rom_version, clk_value, ".dfu");
+
+	ret = request_firmware(&firmware, filename, &udev->dev);
+	if (ret < 0) {
+		BT_ERR("Configuration file not found %s", filename);
+		return ret;
+	}
+
+	ret = ath3k_load_fwfile(udev, firmware);
+	release_firmware(firmware);
+
+	return ret;
+}
+
 static int ath3k_probe(struct usb_interface *intf,
 			const struct usb_device_id *id)
 {
@@ -115,7 +364,37 @@ static int ath3k_probe(struct usb_interface *intf,
 	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
 		return -ENODEV;
 
+	/* match device ID in ath3k blacklist table */
+	if (!id->driver_info) {
+		const struct usb_device_id *match;
+		match = usb_match_id(intf, ath3k_blist_tbl);
+		if (match)
+			id = match;
+	}
+
+	/* load patch and sysconfig files for AR3012 */
+	if (id->driver_info & BTUSB_ATH3012) {
+		ret = ath3k_load_patch(udev);
+		if (ret < 0) {
+			BT_ERR("Loading patch file failed");
+			return ret;
+		}
+		ret = ath3k_load_syscfg(udev);
+		if (ret < 0) {
+			BT_ERR("Loading sysconfig file failed");
+			return ret;
+		}
+		ret = ath3k_set_normal_mode(udev);
+		if (ret < 0) {
+			BT_ERR("Set normal mode failed");
+			return ret;
+		}
+		ath3k_switch_pid(udev);
+		return 0;
+	}
+
 	if (request_firmware(&firmware, "ath3k-1.fw", &udev->dev) < 0) {
+		BT_ERR("Error loading firmware");
 		return -EIO;
 	}
 
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 4cefa91..fa84109 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -105,6 +105,9 @@ static struct usb_device_id blacklist_table[] = {
 	/* Atheros AR9285 Malbec with sflash firmware */
 	{ USB_DEVICE(0x03f0, 0x311d), .driver_info = BTUSB_IGNORE },
 
+	/* Atheros 3012 with sflash firmware */
+	{ USB_DEVICE(0x0cf3, 0x3004), .driver_info = BTUSB_IGNORE },
+
 	/* Broadcom BCM2035 */
 	{ USB_DEVICE(0x0a5c, 0x2035), .driver_info = BTUSB_WRONG_SCO_MTU },
 	{ USB_DEVICE(0x0a5c, 0x200a), .driver_info = BTUSB_WRONG_SCO_MTU },