Bluetooth: Add Marvell BT-over-SDIO driver

This driver supports Marvell Bluetooth enabled devices with SDIO
interface. Currently only SD8688 chip is supported.

The helper/firmware images of SD8688 can be downloaded from this tree:
git://git.infradead.org/users/dwmw2/linux-firmware.git



This patch incorporates a lot of comments given by
Nicolas Pitre <nico@marvell.com>. Many thanks to Nicolas Pitre.

Signed-off-by: Rahul Tank <rahult@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/Kconfig

@@ -182,5 +182,18 @@ config BT_MRVL
 	  Say Y here to compile Marvell Bluetooth driver
 	  into the kernel or say M to compile it as module.
 
+config BT_MRVL_SDIO
+	tristate "Marvell BT-over-SDIO driver"
+	depends on BT_MRVL && MMC
+	help
+	  The driver for Marvell Bluetooth chipsets with SDIO interface.
+
+	  This driver is required if you want to use Marvell Bluetooth
+	  devices with SDIO interface. Currently only SD8688 chipset is
+	  supported.
+
+	  Say Y here to compile support for Marvell BT-over-SDIO driver
+	  into the kernel or say M to compile it as module.
+
 endmenu
 

drivers/bluetooth/Makefile

@@ -17,6 +17,7 @@ obj-$(CONFIG_BT_HCIBTSDIO)	+= btsdio.o
 
 btmrvl-objs			:= btmrvl_main.o
 obj-$(CONFIG_BT_MRVL)		+= btmrvl.o
+obj-$(CONFIG_BT_MRVL_SDIO)	+= btmrvl_sdio.o
 
 hci_uart-y				:= hci_ldisc.o
 hci_uart-$(CONFIG_BT_HCIUART_H4)	+= hci_h4.o

drivers/bluetooth/btmrvl_sdio.h

+/**
+ * Marvell BT-over-SDIO driver: SDIO interface related definitions
+ *
+ * Copyright (C) 2009, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License").  You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
+ * this warranty disclaimer.
+ *
+ **/
+
+#ifndef _BTMRVL_SDIO_H_
+#define _BTMRVL_SDIO_H_
+
+#define SDIO_HEADER_LEN			4
+
+/* SD block size can not bigger than 64 due to buf size limit in firmware */
+/* define SD block size for data Tx/Rx */
+#define SDIO_BLOCK_SIZE			64
+
+/* Number of blocks for firmware transfer */
+#define FIRMWARE_TRANSFER_NBLOCK	2
+
+/* This is for firmware specific length */
+#define FW_EXTRA_LEN			36
+
+#define MRVDRV_SIZE_OF_CMD_BUFFER       (2 * 1024)
+
+#define MRVDRV_BT_RX_PACKET_BUFFER_SIZE \
+	(HCI_MAX_FRAME_SIZE + FW_EXTRA_LEN)
+
+#define ALLOC_BUF_SIZE	(((max_t (int, MRVDRV_BT_RX_PACKET_BUFFER_SIZE, \
+			MRVDRV_SIZE_OF_CMD_BUFFER) + SDIO_HEADER_LEN \
+			+ SDIO_BLOCK_SIZE - 1) / SDIO_BLOCK_SIZE) \
+			* SDIO_BLOCK_SIZE)
+
+/* The number of times to try when polling for status */
+#define MAX_POLL_TRIES			100
+
+/* Max retry number of CMD53 write */
+#define MAX_WRITE_IOMEM_RETRY		2
+
+/* Host Control Registers */
+#define IO_PORT_0_REG			0x00
+#define IO_PORT_1_REG			0x01
+#define IO_PORT_2_REG			0x02
+
+#define CONFIG_REG			0x03
+#define HOST_POWER_UP			BIT(1)
+#define HOST_CMD53_FIN			BIT(2)
+
+#define HOST_INT_MASK_REG		0x04
+#define HIM_DISABLE			0xff
+#define HIM_ENABLE			(BIT(0) | BIT(1))
+
+#define HOST_INTSTATUS_REG		0x05
+#define UP_LD_HOST_INT_STATUS		BIT(0)
+#define DN_LD_HOST_INT_STATUS		BIT(1)
+
+/* Card Control Registers */
+#define SQ_READ_BASE_ADDRESS_A0_REG  	0x10
+#define SQ_READ_BASE_ADDRESS_A1_REG  	0x11
+
+#define CARD_STATUS_REG              	0x20
+#define DN_LD_CARD_RDY               	BIT(0)
+#define CARD_IO_READY              	BIT(3)
+
+#define CARD_FW_STATUS0_REG		0x40
+#define CARD_FW_STATUS1_REG		0x41
+#define FIRMWARE_READY			0xfedc
+
+#define CARD_RX_LEN_REG			0x42
+#define CARD_RX_UNIT_REG		0x43
+
+
+struct btmrvl_sdio_card {
+	struct sdio_func *func;
+	u32 ioport;
+	const char *helper;
+	const char *firmware;
+	u8 rx_unit;
+	struct btmrvl_private *priv;
+};
+
+struct btmrvl_sdio_device {
+	unsigned short dev_id;
+	const char *helper;
+	const char *firmware;
+};
+
+
+/* Platform specific DMA alignment */
+#define BTSDIO_DMA_ALIGN		8
+
+/* Macros for Data Alignment : size */
+#define ALIGN_SZ(p, a)	\
+	(((p) + ((a) - 1)) & ~((a) - 1))
+
+/* Macros for Data Alignment : address */
+#define ALIGN_ADDR(p, a)	\
+	((((u32)(p)) + (((u32)(a)) - 1)) & ~(((u32)(a)) - 1))
+
+#endif /* _BTMRVL_SDIO_H_ */