projects / deliverable / linux.git / blame
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| f64f8808 VB |
1 | /* Altera TSE SGDMA and MSGDMA Linux driver |
| 2 | * Copyright (C) 2014 Altera Corporation. All rights reserved | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify it | |
| 5 | * under the terms and conditions of the GNU General Public License, | |
| 6 | * version 2, as published by the Free Software Foundation. | |
| 7 | * | |
| 8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 11 | * more details. | |
| 12 | * | |
| 13 | * You should have received a copy of the GNU General Public License along with | |
| 14 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
| 15 | */ | |
| 16 | ||
| 17 | #ifndef __ALTERA_SGDMAHW_H__ | |
| 18 | #define __ALTERA_SGDMAHW_H__ | |
| 19 | ||
| 20 | /* SGDMA descriptor structure */ | |
| 21 | struct sgdma_descrip { | |
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22 | u32 raddr; /* address of data to be read */ |
| 23 | u32 pad1; | |
| 24 | u32 waddr; | |
| 25 | u32 pad2; | |
| 26 | u32 next; | |
| 27 | u32 pad3; | |
| 28 | u16 bytes; | |
| 29 | u8 rburst; | |
| 30 | u8 wburst; | |
| 31 | u16 bytes_xferred; /* 16 bits, bytes xferred */ | |
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32 | |
| 33 | /* bit 0: error | |
| 34 | * bit 1: length error | |
| 35 | * bit 2: crc error | |
| 36 | * bit 3: truncated error | |
| 37 | * bit 4: phy error | |
| 38 | * bit 5: collision error | |
| 39 | * bit 6: reserved | |
| 40 | * bit 7: status eop for recv case | |
| 41 | */ | |
| 89830580 | 42 | u8 status; |
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43 | |
| 44 | /* bit 0: eop | |
| 45 | * bit 1: read_fixed | |
| 46 | * bit 2: write fixed | |
| 47 | * bits 3,4,5,6: Channel (always 0) | |
| 48 | * bit 7: hardware owned | |
| 49 | */ | |
| 89830580 | 50 | u8 control; |
| f64f8808 VB |
51 | } __packed; |
| 52 | ||
| c3ffe0ca | 53 | #define SGDMA_DESC_LEN sizeof(struct sgdma_descrip) |
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54 | |
| 55 | #define SGDMA_STATUS_ERR BIT(0) | |
| 56 | #define SGDMA_STATUS_LENGTH_ERR BIT(1) | |
| 57 | #define SGDMA_STATUS_CRC_ERR BIT(2) | |
| 58 | #define SGDMA_STATUS_TRUNC_ERR BIT(3) | |
| 59 | #define SGDMA_STATUS_PHY_ERR BIT(4) | |
| 60 | #define SGDMA_STATUS_COLL_ERR BIT(5) | |
| 61 | #define SGDMA_STATUS_EOP BIT(7) | |
| 62 | ||
| 63 | #define SGDMA_CONTROL_EOP BIT(0) | |
| 64 | #define SGDMA_CONTROL_RD_FIXED BIT(1) | |
| 65 | #define SGDMA_CONTROL_WR_FIXED BIT(2) | |
| 66 | ||
| 67 | /* Channel is always 0, so just zero initialize it */ | |
| 68 | ||
| 69 | #define SGDMA_CONTROL_HW_OWNED BIT(7) | |
| 70 | ||
| 71 | /* SGDMA register space */ | |
| 72 | struct sgdma_csr { | |
| 73 | /* bit 0: error | |
| 74 | * bit 1: eop | |
| 75 | * bit 2: descriptor completed | |
| 76 | * bit 3: chain completed | |
| 77 | * bit 4: busy | |
| 78 | * remainder reserved | |
| 79 | */ | |
| 80 | u32 status; | |
| 81 | u32 pad1[3]; | |
| 82 | ||
| 83 | /* bit 0: interrupt on error | |
| 84 | * bit 1: interrupt on eop | |
| 85 | * bit 2: interrupt after every descriptor | |
| 86 | * bit 3: interrupt after last descrip in a chain | |
| 87 | * bit 4: global interrupt enable | |
| 88 | * bit 5: starts descriptor processing | |
| 89 | * bit 6: stop core on dma error | |
| 90 | * bit 7: interrupt on max descriptors | |
| 91 | * bits 8-15: max descriptors to generate interrupt | |
| 92 | * bit 16: Software reset | |
| 93 | * bit 17: clears owned by hardware if 0, does not clear otherwise | |
| 94 | * bit 18: enables descriptor polling mode | |
| 95 | * bit 19-26: clocks before polling again | |
| 96 | * bit 27-30: reserved | |
| 97 | * bit 31: clear interrupt | |
| 98 | */ | |
| 99 | u32 control; | |
| 100 | u32 pad2[3]; | |
| 101 | u32 next_descrip; | |
| 102 | u32 pad3[3]; | |
| 103 | }; | |
| 104 | ||
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105 | #define sgdma_csroffs(a) (offsetof(struct sgdma_csr, a)) |
| 106 | #define sgdma_descroffs(a) (offsetof(struct sgdma_descrip, a)) | |
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107 | |
| 108 | #define SGDMA_STSREG_ERR BIT(0) /* Error */ | |
| 109 | #define SGDMA_STSREG_EOP BIT(1) /* EOP */ | |
| 110 | #define SGDMA_STSREG_DESCRIP BIT(2) /* Descriptor completed */ | |
| 111 | #define SGDMA_STSREG_CHAIN BIT(3) /* Chain completed */ | |
| 112 | #define SGDMA_STSREG_BUSY BIT(4) /* Controller busy */ | |
| 113 | ||
| 114 | #define SGDMA_CTRLREG_IOE BIT(0) /* Interrupt on error */ | |
| 115 | #define SGDMA_CTRLREG_IOEOP BIT(1) /* Interrupt on EOP */ | |
| 116 | #define SGDMA_CTRLREG_IDESCRIP BIT(2) /* Interrupt after every descriptor */ | |
| 117 | #define SGDMA_CTRLREG_ILASTD BIT(3) /* Interrupt after last descriptor */ | |
| 118 | #define SGDMA_CTRLREG_INTEN BIT(4) /* Global Interrupt enable */ | |
| 119 | #define SGDMA_CTRLREG_START BIT(5) /* starts descriptor processing */ | |
| 120 | #define SGDMA_CTRLREG_STOPERR BIT(6) /* stop on dma error */ | |
| 121 | #define SGDMA_CTRLREG_INTMAX BIT(7) /* Interrupt on max descriptors */ | |
| 122 | #define SGDMA_CTRLREG_RESET BIT(16)/* Software reset */ | |
| 123 | #define SGDMA_CTRLREG_COBHW BIT(17)/* Clears owned by hardware */ | |
| 124 | #define SGDMA_CTRLREG_POLL BIT(18)/* enables descriptor polling mode */ | |
| 125 | #define SGDMA_CTRLREG_CLRINT BIT(31)/* Clears interrupt */ | |
| 126 | ||
| 127 | #endif /* __ALTERA_SGDMAHW_H__ */ |