/* Copyright (c) 2012, 2015-2017 The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials provided
 *       with the distribution.
 *     * Neither the name of The Linux Foundation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __BAM_H
#define __BAM_H

#include <compiler.h>

#define BAM_V170 1
#if BAM_V170
#define BAM_IRQ_SRCS(x, n)              (0x00003000 + 0x1000 * (n) + (x))
#define BAM_IRQ_SRCS_MSK(x, n)          (0x00003004 + 0x1000 * (n) + (x))
#define BAM_IRQ_SRCS_UNMASKED(x)        (0x00003018 + (x))
#define BAM_TRUST_REG(x)                (0x00002000 + (x))
#define BAM_P_CTRLn(n, x)               (0x00013000 + 0x1000 * (n) + (x))
#define BAM_P_RSTn(n, x)                (0x00013000 + 0x4 + 0x1000 * (n) + (x))
#define BAM_P_IRQ_STTSn(n, x)           (0x00013000 + 0x10 + 0x1000 * (n) + (x))
#define BAM_P_IRQ_CLRn(n, x)            (0x00013000 + 0x14 + 0x1000 * (n) + (x))
#define BAM_P_IRQ_ENn(n, x)             (0x00013000 + 0x18 + 0x1000 * (n) + (x))
#define BAM_P_TRUST_REGn(n, x)          (0x2020 + 0x4* (n) + (x))
#define BAM_P_SW_OFSTSn(n, x)           (0x00013800 + 0x1000 * (n) + (x))
#define BAM_P_EVNT_REGn(n, x)           (0x00013818 + 0x1000 * (n) + (x))
#define BAM_P_DESC_FIFO_ADDRn(n, x)     (0x0001381C + 0x1000 * (n) + (x))
#define BAM_P_FIFO_SIZESn(n, x)         (0x00013820 + 0x1000 * (n) + (x))
#else
#define BAM_IRQ_SRCS(x, n)              (0x00000800 + (0x80 * (n)) + (x))
#define BAM_IRQ_SRCS_MSK(x, n)          (0x00000804 + (0x80 * (n)) + (x))
#define BAM_IRQ_SRCS_UNMASKED(x)        (0x00000030 + (x))
#define BAM_TRUST_REG(x)                (0x00000070 + (x))
#define BAM_P_CTRLn(n, x)               (0x00001000 + 0x1000 * (n) + (x))
#define BAM_P_RSTn(n, x)                (0x00001000 + 0x4 + 0x1000 * (n) + (x))
#define BAM_P_IRQ_STTSn(n, x)           (0x00001000 + 0x10 + 0x1000 * (n) + (x))
#define BAM_P_IRQ_CLRn(n, x)            (0x00001000 + 0x14 + 0x1000 * (n) + (x))
#define BAM_P_IRQ_ENn(n, x)             (0x00001000 + 0x18 + 0x1000 * (n) + (x))
#define BAM_P_TRUST_REGn(n, x)          (0x00001000 + 0x30 + 0x1000 * (n) + (x))
#define BAM_P_SW_OFSTSn(n, x)           (0x00001800 + 0x1000 * (n) + (x))
#define BAM_P_EVNT_REGn(n, x)           (0x00001818 + 0x1000 * (n) + (x))
#define BAM_P_DESC_FIFO_ADDRn(n, x)     (0x0000181C + 0x1000 * (n) + (x))
#define BAM_P_FIFO_SIZESn(n, x)         (0x00001820 + 0x1000 * (n) + (x))
#endif

#define BAM_DESC_SIZE                   8
#define BAM_CE_SIZE                     16
#define BAM_MAX_DESC_DATA_LEN           0xFFFF
#define BAM_NDP_MAX_DESC_DATA_LEN       0x7FFF
#define BAM_DATA_READ                   0
#define BAM_DATA_WRITE                  1

#define BAM_CTRL_REG(x)                 (0x0000 + (x))
#define BAM_SW_RST_BIT_MASK             1
#define BAM_ENABLE_BIT_MASK             (1 << 1)

#define BAM_DESC_CNT_TRSHLD_REG(x)      (0x0008 + (x))
#define COUNT_TRESHOLD_MASK             0xFF
#define BAM_IRQ_MASK                    (1 << 31)
#define BAM_IRQ_EN                      (1 << 31)
#define P_IRQ_MASK                      (1)
#define BAM_IRQ_SRCS_PIPE_MASK          0x7FFF

#define BAM_IRQ_STTS(x)                 (0x00000014 + (x))

#define BAM_IRQ_EN_REG(x)               (0x001C + (x))
#define BAM_TIMER_EN_MASK               (1 << 4)
/* Available only in BAM-Lite */
#define BAM_EMPTY_EN_MASK               (1 << 3)
#define BAM_ERROR_EN_MASK               (1 << 2)
/* Available only in BAM */
#define BAM_HRESP_ERR_EN_MASK           (1 << 1)

#define BAM_EE_MASK                     (7 << 0)
#define BAM_RESET_BLK_MASK              (1 << 7)
#define BAM_LOCK_EE_CTRL_MASK           (1 << 13)

#define BAM_CNFG_BITS(x)                (0x0000007C + (x))

#define P_SYS_MODE_MASK                 (1 << 5)
/* 1: Producer mode 0: Consumer mode */
#define P_DIRECTION_SHIFT               3
#define P_LOCK_GRP_SHIFT                16
#define P_ENABLE                        (1 << 1)

#define P_DESC_FIFO_PEER_OFST_MASK      0xFF


/* Flags for descriptors */
#define BAM_DESC_INT_FLAG               (1 << 7)
#define BAM_DESC_EOT_FLAG               (1 << 6)
#define BAM_DESC_EOB_FLAG               (1 << 5)
#define BAM_DESC_NWD_FLAG               (1 << 4)
#define BAM_DESC_CMD_FLAG               (1 << 3)
#define BAM_DESC_LOCK_FLAG              (1 << 2)
#define BAM_DESC_UNLOCK_FLAG            (1 << 1)

#define BAM_CE_REG_ADDR_MASK            0xFF000000
#define BAM_CE_REG_MASK                 0xFFFFFFFF
#define BAM_CE_CMD_TYPE_SHIFT           24
typedef unsigned long addr_t;

static inline int ispow2(uint val)
{
	return ((val - 1) & val) == 0;
}

/* Pipe Interrupt masks */
enum p_int_type
{
	P_PRCSD_DESC_EN_MASK = 1,
	P_OUT_OF_DESC_EN_MASK = (1 << 3),
	P_ERR_EN_MASK = (1 << 4),
	P_TRNSFR_END_EN_MASK = (1 << 5)
};

enum bam_ce_cmd_t{
	CE_WRITE_TYPE = 0,
	CE_READ_TYPE = 1
};

/* result type */
typedef enum {
	BAM_RESULT_SUCCESS = 0,
	BAM_RESULT_FAILURE = 1,
	BAM_RESULT_TIMEOUT = 2
} bam_result_t;


/* Enum to define the BAM type:
 * BAM2BAM:Producer BAM to Consumer BAM.
 * SYS2BAM:Producer System to Consumer BAM.
 * BAM2SYS:Producer BAM to Consumer System.
 */
enum bam_transaction_type {
	SYS2BAM,
	BAM2SYS,
	BAM2BAM,
};

/* Enum to define BAM mode:
 * SPS:Use BAM pipes.
 * DIRECT:Pipes are disabled.
 * LEGACY:BAM is not used.
 */
enum bam_mode {
	SPS,
	DIRECT,
	LEGACY,
};

/* Enum to define BAM pipe states:
 * ENABLED:Producer and Consumer pipes are enabled.
 * HALT:Consumer pipe is halted. (Preferred type)
 * FULL_HALT:Both Producer and Consumer pipes are halted.
 */
enum bam_pipe_state {
	ENABLED,
	HALT,
	FULL_HALT,
};

enum bam_type {
	BAM_LITE,
	BAM,
};

/* Structure to define BAM descriptors that describe the data
 * descriptors written to the data FIFO.
 * addr:Descriptor address.
 * size:Each descriptor is 8 bytes. Size of the descriptor fifo must
 *      contain an integer number of Descriptors.
 */
struct bam_desc {
	uint32_t addr;
	uint16_t size;
	uint8_t reserved;
	uint8_t flags;
} __attribute__ ((packed));

struct bam_desc_fifo {
	struct bam_desc *head;
	struct bam_desc *current;
	uint16_t size;
	uint16_t offset;
};

/* Structure to define BAM pipes
 * pipe_state: BAM pipe states.
 * trans_type: BAM tranaction type.
 * evt_gen_threshold: This register configures the threshold value for
 *                    Read/Write event generation by the BAM
 *                    towards another BAM.
 * fifo: Circular fifo associated with this pipe.
 * num_pipe: Number of pipes used in this bam.
 * pipe: Pipe number for this pipe.
 * spi_num: SPI number for the BAM interrupt.
 * int_mode: Specifies the pipe mode.
 *           1: Interrupt mode
 *           0: Polling mode
 */
struct bam_pipe {
	enum bam_pipe_state state;
	enum bam_transaction_type trans_type;
	struct bam_desc_fifo fifo;
	uint16_t evt_gen_threshold;
	uint8_t pipe_num;
	uint8_t spi_num;
	uint8_t int_mode;
	uint8_t initialized;
	uint8_t lock_grp;
};

/* Structure to define a BAM instance being used
 * base:Base address for the BAM.
 * type:BAM type.
 * mode:BAM mode.
 * pipe_pair:The pipe pairs to be used to access the BAM.
 * threshold:This Register holds a threshold value for the
 *           counter summing the Size of the Descriptors Provided.
 * ee:Execution Environment for the BAM.
 * desc_len: Max desc length for the current BAM.
 */
struct bam_instance {
	uint32_t base;
	enum bam_type type;
	enum bam_mode mode;
	uint8_t num_of_pipes;
	struct bam_pipe pipe[4];
	uint16_t threshold;
	uint32_t ee;
	uint16_t max_desc_len;
	void (*callback)(int);
};

/* Command element(CE) structure*/
struct cmd_element {
	uint32_t addr_n_cmd;
	uint32_t reg_data;
	uint32_t reg_mask;
	uint32_t reserve;
} __attribute__ ((packed));

void bam_init(struct bam_instance *bam);
void bam_sys_pipe_init(struct bam_instance *bam,
                       uint8_t pipe_num);
int bam_pipe_fifo_init(struct bam_instance *bam,
                       uint8_t pipe_num);
struct cmd_element* bam_add_cmd_element(struct cmd_element *ptr,
                                        uint32_t addr,
                                        uint32_t data,
                                        enum bam_ce_cmd_t cmd_type);
int bam_add_desc(struct bam_instance *bam,
                 unsigned int pipe_num,
                 unsigned char *data_ptr,
                 unsigned int data_len,
                 unsigned flags);
int bam_add_one_desc(struct bam_instance *bam,
                     unsigned int pipe_num,
                     unsigned char*,
                     uint32_t len,
                     uint8_t flags);
void bam_sys_gen_event(struct bam_instance *bam,
                       uint8_t pipe_num,
                       unsigned int num_desc);
int bam_wait_for_interrupt(struct bam_instance *bam,
                           uint8_t pipe_num,
                           enum p_int_type interrupt);
void bam_read_offset_update(struct bam_instance *bam, unsigned int pipe_num);
void bam_pipe_reset(struct bam_instance *bam,
					uint8_t pipe_num);

#endif