altera_msgdmahw.h
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/* Altera TSE SGDMA and MSGDMA Linux driver
* Copyright (C) 2014 Altera Corporation. All rights reserved
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#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) & 0xff)
#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 (0xff << 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 (0x00010001)
#define MSGDMA_DESC_RX_STRIDE (0x00010001)
/* 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 0x3FF
#define MSGDMA_CSR_STAT_MASK_WITHOUT_IRQ 0x1FF
#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) & 0xffff0000) >> 16)
#define MSGDMA_CSR_RD_FILL_LEVEL_GET(v) ((v) & 0x0000ffff)
#define MSGDMA_CSR_RESP_FILL_LEVEL_GET(v) ((v) & 0x0000ffff)
/* 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 0xFF
#endif /* __ALTERA_MSGDMA_H__*/