/* SPDX-License-Identifier: GPL-2.0-only */
/* Altera TSE SGDMA and MSGDMA Linux driver
* Copyright ( C ) 2014 Altera Corporation . All rights reserved
*/
#ifndef __ALTERA_SGDMAHW_H__
#define __ALTERA_SGDMAHW_H__
/* SGDMA descriptor structure */
struct sgdma_descrip {
u32 raddr; /* address of data to be read */
u32 pad1;
u32 waddr;
u32 pad2;
u32 next;
u32 pad3;
u16 bytes;
u8 rburst;
u8 wburst;
u16 bytes_xferred; /* 16 bits, bytes xferred */
/* bit 0: error
* bit 1 : length error
* bit 2 : crc error
* bit 3 : truncated error
* bit 4 : phy error
* bit 5 : collision error
* bit 6 : reserved
* bit 7 : status eop for recv case
*/
u8 status;
/* bit 0: eop
* bit 1 : read_fixed
* bit 2 : write fixed
* bits 3 , 4 , 5 , 6 : Channel ( always 0 )
* bit 7 : hardware owned
*/
u8 control;
} __packed;
#define SGDMA_DESC_LEN sizeof (struct sgdma_descrip)
#define SGDMA_STATUS_ERR BIT(0 )
#define SGDMA_STATUS_LENGTH_ERR BIT(1 )
#define SGDMA_STATUS_CRC_ERR BIT(2 )
#define SGDMA_STATUS_TRUNC_ERR BIT(3 )
#define SGDMA_STATUS_PHY_ERR BIT(4 )
#define SGDMA_STATUS_COLL_ERR BIT(5 )
#define SGDMA_STATUS_EOP BIT(7 )
#define SGDMA_CONTROL_EOP BIT(0 )
#define SGDMA_CONTROL_RD_FIXED BIT(1 )
#define SGDMA_CONTROL_WR_FIXED BIT(2 )
/* Channel is always 0, so just zero initialize it */
#define SGDMA_CONTROL_HW_OWNED BIT(7 )
/* SGDMA register space */
struct sgdma_csr {
/* bit 0: error
* bit 1 : eop
* bit 2 : descriptor completed
* bit 3 : chain completed
* bit 4 : busy
* remainder reserved
*/
u32 status;
u32 pad1[3 ];
/* bit 0: interrupt on error
* bit 1 : interrupt on eop
* bit 2 : interrupt after every descriptor
* bit 3 : interrupt after last descrip in a chain
* bit 4 : global interrupt enable
* bit 5 : starts descriptor processing
* bit 6 : stop core on dma error
* bit 7 : interrupt on max descriptors
* bits 8 - 15 : max descriptors to generate interrupt
* bit 16 : Software reset
* bit 17 : clears owned by hardware if 0 , does not clear otherwise
* bit 18 : enables descriptor polling mode
* bit 19 - 26 : clocks before polling again
* bit 27 - 30 : reserved
* bit 31 : clear interrupt
*/
u32 control;
u32 pad2[3 ];
u32 next_descrip;
u32 pad3[3 ];
};
#define sgdma_csroffs(a) (offsetof(struct sgdma_csr, a))
#define sgdma_descroffs(a) (offsetof(struct sgdma_descrip, a))
#define SGDMA_STSREG_ERR BIT(0 ) /* Error */
#define SGDMA_STSREG_EOP BIT(1 ) /* EOP */
#define SGDMA_STSREG_DESCRIP BIT(2 ) /* Descriptor completed */
#define SGDMA_STSREG_CHAIN BIT(3 ) /* Chain completed */
#define SGDMA_STSREG_BUSY BIT(4 ) /* Controller busy */
#define SGDMA_CTRLREG_IOE BIT(0 ) /* Interrupt on error */
#define SGDMA_CTRLREG_IOEOP BIT(1 ) /* Interrupt on EOP */
#define SGDMA_CTRLREG_IDESCRIP BIT(2 ) /* Interrupt after every descriptor */
#define SGDMA_CTRLREG_ILASTD BIT(3 ) /* Interrupt after last descriptor */
#define SGDMA_CTRLREG_INTEN BIT(4 ) /* Global Interrupt enable */
#define SGDMA_CTRLREG_START BIT(5 ) /* starts descriptor processing */
#define SGDMA_CTRLREG_STOPERR BIT(6 ) /* stop on dma error */
#define SGDMA_CTRLREG_INTMAX BIT(7 ) /* Interrupt on max descriptors */
#define SGDMA_CTRLREG_RESET BIT(16 )/* Software reset */
#define SGDMA_CTRLREG_COBHW BIT(17 )/* Clears owned by hardware */
#define SGDMA_CTRLREG_POLL BIT(18 )/* enables descriptor polling mode */
#define SGDMA_CTRLREG_CLRINT BIT(31 )/* Clears interrupt */
#endif /* __ALTERA_SGDMAHW_H__ */
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