diff options
Diffstat (limited to 'drivers/net/ethernet/altera/altera_sgdmahw.h')
| -rw-r--r-- | drivers/net/ethernet/altera/altera_sgdmahw.h | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/drivers/net/ethernet/altera/altera_sgdmahw.h b/drivers/net/ethernet/altera/altera_sgdmahw.h new file mode 100644 index 000000000000..ba3334f35383 --- /dev/null +++ b/drivers/net/ethernet/altera/altera_sgdmahw.h @@ -0,0 +1,124 @@ +/* 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 { + unsigned int raddr; /* address of data to be read */ + unsigned int pad1; + unsigned int waddr; + unsigned int pad2; + unsigned int next; + unsigned int pad3; + unsigned short bytes; + unsigned char rburst; + unsigned char wburst; + unsigned short 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 + */ + unsigned char status; + + /* bit 0: eop + * bit 1: read_fixed + * bit 2: write fixed + * bits 3,4,5,6: Channel (always 0) + * bit 7: hardware owned + */ + unsigned char control; +} __packed; + + +#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_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__ */ |