xref: /linux/drivers/net/wireless/rsi/rsi_sdio.h (revision 0ea8a56de21be24cb79abb03dee79aabcd60a316)

/**
 * @section LICENSE
 * Copyright (c) 2014 Redpine Signals Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 */

#ifndef __RSI_SDIO_INTF__
#define __RSI_SDIO_INTF__

#include <linux/mmc/card.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/host.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/sdio.h>
#include <linux/mmc/sd.h>
#include <linux/mmc/sdio_ids.h>
#include "rsi_main.h"

enum sdio_interrupt_type {
	BUFFER_FULL         = 0x0,
	BUFFER_AVAILABLE    = 0x2,
	FIRMWARE_ASSERT_IND = 0x3,
	MSDU_PACKET_PENDING = 0x4,
	UNKNOWN_INT         = 0XE
};

/* Buffer status register related info */
#define PKT_BUFF_SEMI_FULL                      0
#define PKT_BUFF_FULL                           1
#define PKT_MGMT_BUFF_FULL                      2
#define MSDU_PKT_PENDING                        3
#define RECV_NUM_BLOCKS                         4
/* Interrupt Bit Related Macros */
#define PKT_BUFF_AVAILABLE                      1
#define FW_ASSERT_IND                           2

#define RSI_MASTER_REG_BUF_SIZE			12

#define RSI_DEVICE_BUFFER_STATUS_REGISTER       0xf3
#define RSI_FN1_INT_REGISTER                    0xf9
#define RSI_INT_ENABLE_REGISTER			0x04
#define RSI_INT_ENABLE_MASK			0xfc
#define RSI_SD_REQUEST_MASTER                   0x10000

/* FOR SD CARD ONLY */
#define SDIO_RX_NUM_BLOCKS_REG                  0x000F1
#define SDIO_FW_STATUS_REG                      0x000F2
#define SDIO_NXT_RD_DELAY2                      0x000F5
#define SDIO_MASTER_ACCESS_MSBYTE               0x000FA
#define SDIO_MASTER_ACCESS_LSBYTE               0x000FB
#define SDIO_READ_START_LVL                     0x000FC
#define SDIO_READ_FIFO_CTL                      0x000FD
#define SDIO_WRITE_FIFO_CTL                     0x000FE
#define SDIO_WAKEUP_REG				0x000FF
#define SDIO_FUN1_INTR_CLR_REG                  0x0008
#define SDIO_REG_HIGH_SPEED                     0x0013

#define RSI_GET_SDIO_INTERRUPT_TYPE(_I, TYPE)      \
	{					   \
		TYPE =                             \
		(_I & (1 << PKT_BUFF_AVAILABLE)) ? \
		BUFFER_AVAILABLE :		   \
		(_I & (1 << MSDU_PKT_PENDING)) ?   \
		MSDU_PACKET_PENDING :              \
		(_I & (1 << FW_ASSERT_IND)) ?      \
		FIRMWARE_ASSERT_IND : UNKNOWN_INT; \
	}

/* common registers in SDIO function1 */
#define TA_SOFT_RESET_REG            0x0004
#define TA_TH0_PC_REG                0x0400
#define TA_HOLD_THREAD_REG           0x0844
#define TA_RELEASE_THREAD_REG        0x0848

#define TA_SOFT_RST_CLR              0
#define TA_SOFT_RST_SET              BIT(0)
#define TA_PC_ZERO                   0
#define TA_HOLD_THREAD_VALUE         0xF
#define TA_RELEASE_THREAD_VALUE      0xF
#define TA_BASE_ADDR                 0x2200
#define MISC_CFG_BASE_ADDR           0x4105

struct receive_info {
	bool buffer_full;
	bool semi_buffer_full;
	bool mgmt_buffer_full;
	u32 mgmt_buf_full_counter;
	u32 buf_semi_full_counter;
	u8 watch_bufferfull_count;
	u32 sdio_intr_status_zero;
	u32 sdio_int_counter;
	u32 total_sdio_msdu_pending_intr;
	u32 total_sdio_unknown_intr;
	u32 buf_full_counter;
	u32 buf_available_counter;
};

struct rsi_sdio_rx_q {
	u8 num_rx_pkts;
	struct sk_buff_head head;
};

struct rsi_91x_sdiodev {
	struct sdio_func *pfunction;
	struct task_struct *sdio_irq_task;
	struct receive_info rx_info;
	u32 next_read_delay;
	u32 sdio_high_speed_enable;
	u8 sdio_clock_speed;
	u32 cardcapability;
	u8 prev_desc[16];
	u16 tx_blk_size;
	u8 write_fail;
	bool buff_status_updated;
	struct rsi_sdio_rx_q rx_q;
	struct rsi_thread rx_thread;
};

void rsi_interrupt_handler(struct rsi_hw *adapter);
int rsi_init_sdio_slave_regs(struct rsi_hw *adapter);
int rsi_sdio_read_register(struct rsi_hw *adapter, u32 addr, u8 *data);
int rsi_sdio_host_intf_read_pkt(struct rsi_hw *adapter, u8 *pkt, u32 length);
int rsi_sdio_write_register(struct rsi_hw *adapter, u8 function,
			    u32 addr, u8 *data);
int rsi_sdio_write_register_multiple(struct rsi_hw *adapter, u32 addr,
				     u8 *data, u16 count);
int rsi_sdio_master_access_msword(struct rsi_hw *adapter, u16 ms_word);
void rsi_sdio_ack_intr(struct rsi_hw *adapter, u8 int_bit);
int rsi_sdio_determine_event_timeout(struct rsi_hw *adapter);
int rsi_sdio_check_buffer_status(struct rsi_hw *adapter, u8 q_num);
void rsi_sdio_rx_thread(struct rsi_common *common);
#endif