1 files changed, 143 insertions, 0 deletions
diff --git a/drivers/staging/csr/sdioemb/sdio_bt_a.h b/drivers/staging/csr/sdioemb/sdio_bt_a.h
new file mode 100644
index 000000000000..9efe4a390db5
--- /dev/null
+++ b/drivers/staging/csr/sdioemb/sdio_bt_a.h
@@ -0,0 +1,143 @@
+/*
+ * SDIO Bluetooth Type-A interface definitions.
+ *
+ * Copyright (C) 2007 Cambridge Silicon Radio Ltd.
+ *
+ * Refer to LICENSE.txt included with this source code for details on
+ * the license terms.
+ */
+#ifndef SDIOEMB_SDIO_BT_A_H
+#define SDIOEMB_SDIO_BT_A_H
+
+#include <sdioemb/sdio_csr.h>
+#include <csr_sdio.h>
+
+/*
+ * Standard SDIO function registers for a Bluetooth Type-A interface.
+ */
+#define SDIO_BT_A_RD 0x00
+#define SDIO_BT_A_TD 0x00
+
+#define SDIO_BT_A_RX_PKT_CTRL 0x10
+#  define PC_RRT 0x01
+
+#define SDIO_BT_A_TX_PKT_CTRL 0x11
+#  define PC_WRT 0x01
+
+#define SDIO_BT_A_RETRY_CTRL  0x12
+#  define RTC_STAT 0x01
+#  define RTC_SET  0x01
+
+#define SDIO_BT_A_INTRD       0x13
+#  define INTRD 0x01
+#  define CL_INTRD 0x01
+
+#define SDIO_BT_A_INT_EN      0x14
+#  define EN_INTRD 0x01
+
+#define SDIO_BT_A_BT_MODE     0x20
+#  define MD_STAT 0x01
+
+/*
+ * Length of the Type-A header.
+ *
+ * Packet length (3 octets) plus Service ID (1 octet).
+ */
+#define SDIO_BT_A_HEADER_LEN 4
+
+/*
+ * Maximum length of a Type-A transport packet.
+ *
+ * Type-A header length and maximum length of a HCI packet (65535
+ * octets).
+ */
+#define SDIO_BT_A_PACKET_LEN_MAX 65543
+
+enum sdioemb_bt_a_service_id {
+    SDIO_BT_A_SID_CMD    = 0x01,
+    SDIO_BT_A_SID_ACL    = 0x02,
+    SDIO_BT_A_SID_SCO    = 0x03,
+    SDIO_BT_A_SID_EVT    = 0x04,
+    SDIO_BT_A_SID_VENDOR = 0xfe,
+};
+
+static __inline int sdioemb_bt_a_packet_len(const char *p)
+{
+    return (p[0] & 0xff) | ((p[1] & 0xff) << 8) | ((p[2] & 0xff) << 16);
+}
+
+static __inline int sdioemb_bt_a_service_id(const char *p)
+{
+    return p[3];
+}
+
+/*
+ * Minimum amount to read (including the Type-A header). This allows
+ * short packets (e.g., flow control packets) to be read with a single
+ * command.
+ */
+#define SDIO_BT_A_MIN_READ 32
+
+#define SDIO_BT_A_NAME_LEN 16
+
+struct sdioemb_bt_a_dev {
+    CsrSdioFunction *func;
+    char name[SDIO_BT_A_NAME_LEN];
+    void *drv_data;
+
+    /**
+     * Get a buffer to receive a packet into.
+     *
+     * @param bt the BT device.
+     * @param header a buffer of length #SDIO_BT_A_MIN_READ containing
+     *      (part of) the packet the buffer is for.  It will contain
+     *      the Type-A header and as much of the payload that will
+     *      fit.
+     * @param buffer_min_len the minimum length of buffer required to
+     *     receive the whole packet.  This includes space for padding
+     *     the read to a whole number of blocks (if more than 512
+     *     octets is still to be read).
+     * @param buffer returns the buffer. The packet (including the
+     *     Type-A header will be placed at the beginning of this
+     *     buffer.
+     * @param buffer_handle returns a buffer handle passed to the
+     *     subsequent call of the receive() callback.
+     *
+     * @return 0 if a buffer was provided.
+     * @return -ENOMEM if no buffer could be provided.
+     */
+    int (*get_rx_buffer)(struct sdioemb_bt_a_dev *bt, const uint8_t *header,
+                         size_t buffer_min_len, uint8_t **buffer, void **buffer_handle);
+    void (*receive)(struct sdioemb_bt_a_dev *bt, void *buffer_handle, int status);
+    void (*sleep_state_changed)(struct sdioemb_bt_a_dev *bt);
+
+    enum sdio_sleep_state sleep_state;
+
+    uint8_t  max_tx_retries;
+    uint8_t  max_rx_retries;
+    unsigned needs_read_ack:1;
+    unsigned wait_for_firmware:1;
+
+    unsigned rx_off:1;
+
+    /**
+     * A buffer to read the packet header into before the real buffer
+     * is requested with the get_rx_buffer() callback.
+     *
+     * @internal
+     */
+    uint8_t *header;
+};
+
+int  sdioemb_bt_a_setup(struct sdioemb_bt_a_dev *bt, CsrSdioFunction *func);
+void sdioemb_bt_a_cleanup(struct sdioemb_bt_a_dev *bt);
+int  sdioemb_bt_a_send(struct sdioemb_bt_a_dev *bt, const uint8_t *packet, size_t len);
+void sdioemb_bt_a_handle_interrupt(struct sdioemb_bt_a_dev *bt);
+void sdioemb_bt_a_set_sleep_state(struct sdioemb_bt_a_dev *bt, enum sdio_sleep_state state);
+int  sdioemb_bt_a_check_for_reset(struct sdioemb_bt_a_dev *bt);
+void sdioemb_bt_a_start(struct sdioemb_bt_a_dev *bt);
+void sdioemb_bt_a_stop(struct sdioemb_bt_a_dev *bt);
+void sdioemb_bt_a_rx_on(struct sdioemb_bt_a_dev *bt);
+void sdioemb_bt_a_rx_off(struct sdioemb_bt_a_dev *bt);
+
+#endif /* #ifndef SDIOEMB_SDIO_BT_A_H */