/* SPDX-License-Identifier: GPL-2.0-only */
/* Altera TSE SGDMA and MSGDMA Linux driver
* Copyright ( C ) 2014 Altera Corporation . All rights reserved
*/
#ifndef __ALTERA_MSGDMAHW_H__
#define __ALTERA_MSGDMAHW_H__
/* mSGDMA extended descriptor format
*/
struct msgdma_extended_desc {
u32 read_addr_lo; /* data buffer source address low bits */
u32 write_addr_lo; /* data buffer destination address low bits */
u32 len; /* the number of bytes to transfer
* per descriptor
*/
u32 burst_seq_num; /* bit 31:24 write burst
* bit 23 : 16 read burst
* bit 15 : 0 sequence number
*/
u32 stride; /* bit 31:16 write stride
* bit 15 : 0 read stride
*/
u32 read_addr_hi; /* data buffer source address high bits */
u32 write_addr_hi; /* data buffer destination address high bits */
u32 control; /* characteristics of the transfer */
};
/* mSGDMA descriptor control field bit definitions
*/
#define MSGDMA_DESC_CTL_SET_CH(x) ((x) & 0 xff)
#define MSGDMA_DESC_CTL_GEN_SOP BIT(8 )
#define MSGDMA_DESC_CTL_GEN_EOP BIT(9 )
#define MSGDMA_DESC_CTL_PARK_READS BIT(10 )
#define MSGDMA_DESC_CTL_PARK_WRITES BIT(11 )
#define MSGDMA_DESC_CTL_END_ON_EOP BIT(12 )
#define MSGDMA_DESC_CTL_END_ON_LEN BIT(13 )
#define MSGDMA_DESC_CTL_TR_COMP_IRQ BIT(14 )
#define MSGDMA_DESC_CTL_EARLY_IRQ BIT(15 )
#define MSGDMA_DESC_CTL_TR_ERR_IRQ (0 xff << 16 )
#define MSGDMA_DESC_CTL_EARLY_DONE BIT(24 )
/* Writing ‘1’ to the ‘go’ bit commits the entire descriptor into the
* descriptor FIFO ( s )
*/
#define MSGDMA_DESC_CTL_GO BIT(31 )
/* Tx buffer control flags
*/
#define MSGDMA_DESC_CTL_TX_FIRST (MSGDMA_DESC_CTL_GEN_SOP | \
MSGDMA_DESC_CTL_GO)
#define MSGDMA_DESC_CTL_TX_MIDDLE (MSGDMA_DESC_CTL_GO)
#define MSGDMA_DESC_CTL_TX_LAST (MSGDMA_DESC_CTL_GEN_EOP | \
MSGDMA_DESC_CTL_TR_COMP_IRQ | \
MSGDMA_DESC_CTL_GO)
#define MSGDMA_DESC_CTL_TX_SINGLE (MSGDMA_DESC_CTL_GEN_SOP | \
MSGDMA_DESC_CTL_GEN_EOP | \
MSGDMA_DESC_CTL_TR_COMP_IRQ | \
MSGDMA_DESC_CTL_GO)
#define MSGDMA_DESC_CTL_RX_SINGLE (MSGDMA_DESC_CTL_END_ON_EOP | \
MSGDMA_DESC_CTL_END_ON_LEN | \
MSGDMA_DESC_CTL_TR_COMP_IRQ | \
MSGDMA_DESC_CTL_EARLY_IRQ | \
MSGDMA_DESC_CTL_TR_ERR_IRQ | \
MSGDMA_DESC_CTL_GO)
/* mSGDMA extended descriptor stride definitions
*/
#define MSGDMA_DESC_TX_STRIDE (0 x00010001)
#define MSGDMA_DESC_RX_STRIDE (0 x00010001)
/* mSGDMA dispatcher control and status register map
*/
struct msgdma_csr {
u32 status; /* Read/Clear */
u32 control; /* Read/Write */
u32 rw_fill_level; /* bit 31:16 - write fill level
* bit 15 : 0 - read fill level
*/
u32 resp_fill_level; /* bit 15:0 */
u32 rw_seq_num; /* bit 31:16 - write sequence number
* bit 15 : 0 - read sequence number
*/
u32 pad[3 ]; /* reserved */
};
/* mSGDMA CSR status register bit definitions
*/
#define MSGDMA_CSR_STAT_BUSY BIT(0 )
#define MSGDMA_CSR_STAT_DESC_BUF_EMPTY BIT(1 )
#define MSGDMA_CSR_STAT_DESC_BUF_FULL BIT(2 )
#define MSGDMA_CSR_STAT_RESP_BUF_EMPTY BIT(3 )
#define MSGDMA_CSR_STAT_RESP_BUF_FULL BIT(4 )
#define MSGDMA_CSR_STAT_STOPPED BIT(5 )
#define MSGDMA_CSR_STAT_RESETTING BIT(6 )
#define MSGDMA_CSR_STAT_STOPPED_ON_ERR BIT(7 )
#define MSGDMA_CSR_STAT_STOPPED_ON_EARLY BIT(8 )
#define MSGDMA_CSR_STAT_IRQ BIT(9 )
#define MSGDMA_CSR_STAT_MASK 0 x3FF
#define MSGDMA_CSR_STAT_MASK_WITHOUT_IRQ 0 x1FF
#define MSGDMA_CSR_STAT_BUSY_GET(v) GET_BIT_VALUE(v, 0 )
#define MSGDMA_CSR_STAT_DESC_BUF_EMPTY_GET(v) GET_BIT_VALUE(v, 1 )
#define MSGDMA_CSR_STAT_DESC_BUF_FULL_GET(v) GET_BIT_VALUE(v, 2 )
#define MSGDMA_CSR_STAT_RESP_BUF_EMPTY_GET(v) GET_BIT_VALUE(v, 3 )
#define MSGDMA_CSR_STAT_RESP_BUF_FULL_GET(v) GET_BIT_VALUE(v, 4 )
#define MSGDMA_CSR_STAT_STOPPED_GET(v) GET_BIT_VALUE(v, 5 )
#define MSGDMA_CSR_STAT_RESETTING_GET(v) GET_BIT_VALUE(v, 6 )
#define MSGDMA_CSR_STAT_STOPPED_ON_ERR_GET(v) GET_BIT_VALUE(v, 7 )
#define MSGDMA_CSR_STAT_STOPPED_ON_EARLY_GET(v) GET_BIT_VALUE(v, 8 )
#define MSGDMA_CSR_STAT_IRQ_GET(v) GET_BIT_VALUE(v, 9 )
/* mSGDMA CSR control register bit definitions
*/
#define MSGDMA_CSR_CTL_STOP BIT(0 )
#define MSGDMA_CSR_CTL_RESET BIT(1 )
#define MSGDMA_CSR_CTL_STOP_ON_ERR BIT(2 )
#define MSGDMA_CSR_CTL_STOP_ON_EARLY BIT(3 )
#define MSGDMA_CSR_CTL_GLOBAL_INTR BIT(4 )
#define MSGDMA_CSR_CTL_STOP_DESCS BIT(5 )
/* mSGDMA CSR fill level bits
*/
#define MSGDMA_CSR_WR_FILL_LEVEL_GET(v) (((v) & 0 xffff0000) >> 16 )
#define MSGDMA_CSR_RD_FILL_LEVEL_GET(v) ((v) & 0 x0000ffff)
#define MSGDMA_CSR_RESP_FILL_LEVEL_GET(v) ((v) & 0 x0000ffff)
/* mSGDMA response register map
*/
struct msgdma_response {
u32 bytes_transferred;
u32 status;
};
#define msgdma_respoffs(a) (offsetof(struct msgdma_response, a))
#define msgdma_csroffs(a) (offsetof(struct msgdma_csr, a))
#define msgdma_descroffs(a) (offsetof(struct msgdma_extended_desc, a))
/* mSGDMA response register bit definitions
*/
#define MSGDMA_RESP_EARLY_TERM BIT(8 )
#define MSGDMA_RESP_ERR_MASK 0 xFF
#endif /* __ALTERA_MSGDMA_H__*/
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