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/*
* 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 */
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