128 lines
3.9 KiB
C
128 lines
3.9 KiB
C
/* 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_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__ */
|