1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #define DMA_CR 0x000 /* Control */ 32 #define DMA_ES 0x004 /* Error Status */ 33 #define DMA_ERQ 0x00C /* Enable Request */ 34 #define DMA_EEI 0x014 /* Enable Error Interrupt */ 35 #define DMA_CEEI 0x018 /* Clear Enable Error Interrupt */ 36 #define DMA_SEEI 0x019 /* Set Enable Error Interrupt */ 37 #define DMA_CERQ 0x01A /* Clear Enable Request */ 38 #define DMA_SERQ 0x01B /* Set Enable Request */ 39 #define DMA_CDNE 0x01C /* Clear DONE Status Bit */ 40 #define DMA_SSRT 0x01D /* Set START Bit */ 41 #define DMA_CERR 0x01E /* Clear Error */ 42 #define CERR_CAEI (1 << 6) /* Clear All Error Indicators */ 43 #define DMA_CINT 0x01F /* Clear Interrupt Request */ 44 #define CINT_CAIR (1 << 6) /* Clear All Interrupt Requests */ 45 #define DMA_INT 0x024 /* Interrupt Request */ 46 #define DMA_ERR 0x02C /* Error */ 47 #define DMA_HRS 0x034 /* Hardware Request Status */ 48 #define DMA_EARS 0x044 /* Enable Asynchronous Request in Stop */ 49 #define DMA_DCHPRI3 0x100 /* Channel n Priority */ 50 #define DMA_DCHPRI2 0x101 /* Channel n Priority */ 51 #define DMA_DCHPRI1 0x102 /* Channel n Priority */ 52 #define DMA_DCHPRI0 0x103 /* Channel n Priority */ 53 #define DMA_DCHPRI7 0x104 /* Channel n Priority */ 54 #define DMA_DCHPRI6 0x105 /* Channel n Priority */ 55 #define DMA_DCHPRI5 0x106 /* Channel n Priority */ 56 #define DMA_DCHPRI4 0x107 /* Channel n Priority */ 57 #define DMA_DCHPRI11 0x108 /* Channel n Priority */ 58 #define DMA_DCHPRI10 0x109 /* Channel n Priority */ 59 #define DMA_DCHPRI9 0x10A /* Channel n Priority */ 60 #define DMA_DCHPRI8 0x10B /* Channel n Priority */ 61 #define DMA_DCHPRI15 0x10C /* Channel n Priority */ 62 #define DMA_DCHPRI14 0x10D /* Channel n Priority */ 63 #define DMA_DCHPRI13 0x10E /* Channel n Priority */ 64 #define DMA_DCHPRI12 0x10F /* Channel n Priority */ 65 #define DMA_DCHPRI19 0x110 /* Channel n Priority */ 66 #define DMA_DCHPRI18 0x111 /* Channel n Priority */ 67 #define DMA_DCHPRI17 0x112 /* Channel n Priority */ 68 #define DMA_DCHPRI16 0x113 /* Channel n Priority */ 69 #define DMA_DCHPRI23 0x114 /* Channel n Priority */ 70 #define DMA_DCHPRI22 0x115 /* Channel n Priority */ 71 #define DMA_DCHPRI21 0x116 /* Channel n Priority */ 72 #define DMA_DCHPRI20 0x117 /* Channel n Priority */ 73 #define DMA_DCHPRI27 0x118 /* Channel n Priority */ 74 #define DMA_DCHPRI26 0x119 /* Channel n Priority */ 75 #define DMA_DCHPRI25 0x11A /* Channel n Priority */ 76 #define DMA_DCHPRI24 0x11B /* Channel n Priority */ 77 #define DMA_DCHPRI31 0x11C /* Channel n Priority */ 78 #define DMA_DCHPRI30 0x11D /* Channel n Priority */ 79 #define DMA_DCHPRI29 0x11E /* Channel n Priority */ 80 #define DMA_DCHPRI28 0x11F /* Channel n Priority */ 81 82 #define DMA_TCDn_SADDR(n) (0x00 + 0x20 * n) /* Source Address */ 83 #define DMA_TCDn_SOFF(n) (0x04 + 0x20 * n) /* Signed Source Address Offset */ 84 #define DMA_TCDn_ATTR(n) (0x06 + 0x20 * n) /* Transfer Attributes */ 85 #define DMA_TCDn_NBYTES_MLNO(n) (0x08 + 0x20 * n) /* Minor Byte Count */ 86 #define DMA_TCDn_NBYTES_MLOFFNO(n) (0x08 + 0x20 * n) /* Signed Minor Loop Offset */ 87 #define DMA_TCDn_NBYTES_MLOFFYES(n) (0x08 + 0x20 * n) /* Signed Minor Loop Offset */ 88 #define DMA_TCDn_SLAST(n) (0x0C + 0x20 * n) /* Last Source Address Adjustment */ 89 #define DMA_TCDn_DADDR(n) (0x10 + 0x20 * n) /* Destination Address */ 90 #define DMA_TCDn_DOFF(n) (0x14 + 0x20 * n) /* Signed Destination Address Offset */ 91 #define DMA_TCDn_CITER_ELINKYES(n) (0x16 + 0x20 * n) /* Current Minor Loop Link, Major Loop Count */ 92 #define DMA_TCDn_CITER_ELINKNO(n) (0x16 + 0x20 * n) 93 #define DMA_TCDn_DLASTSGA(n) (0x18 + 0x20 * n) /* Last Dst Addr Adjustment/Scatter Gather Address */ 94 #define DMA_TCDn_CSR(n) (0x1C + 0x20 * n) /* Control and Status */ 95 #define DMA_TCDn_BITER_ELINKYES(n) (0x1E + 0x20 * n) /* Beginning Minor Loop Link, Major Loop Count */ 96 #define DMA_TCDn_BITER_ELINKNO(n) (0x1E + 0x20 * n) /* Beginning Minor Loop Link, Major Loop Count */ 97 98 #define TCD_CSR_START (1 << 0) 99 #define TCD_CSR_INTMAJOR (1 << 1) 100 #define TCD_CSR_INTHALF (1 << 2) 101 #define TCD_CSR_DREQ (1 << 3) 102 #define TCD_CSR_ESG (1 << 4) 103 #define TCD_CSR_MAJORELINK (1 << 5) 104 #define TCD_CSR_ACTIVE (1 << 6) 105 #define TCD_CSR_DONE (1 << 7) 106 #define TCD_CSR_MAJORELINKCH_SHIFT 8 107 108 #define TCD_ATTR_SMOD_SHIFT 11 /* Source Address Modulo */ 109 #define TCD_ATTR_SSIZE_SHIFT 8 /* Source Data Transfer Size */ 110 #define TCD_ATTR_DMOD_SHIFT 3 /* Dst Address Modulo */ 111 #define TCD_ATTR_DSIZE_SHIFT 0 /* Dst Data Transfer Size */ 112 113 #define TCD_READ4(_sc, _reg) \ 114 bus_space_read_4(_sc->bst_tcd, _sc->bsh_tcd, _reg) 115 #define TCD_WRITE4(_sc, _reg, _val) \ 116 bus_space_write_4(_sc->bst_tcd, _sc->bsh_tcd, _reg, _val) 117 #define TCD_READ2(_sc, _reg) \ 118 bus_space_read_2(_sc->bst_tcd, _sc->bsh_tcd, _reg) 119 #define TCD_WRITE2(_sc, _reg, _val) \ 120 bus_space_write_2(_sc->bst_tcd, _sc->bsh_tcd, _reg, _val) 121 #define TCD_READ1(_sc, _reg) \ 122 bus_space_read_1(_sc->bst_tcd, _sc->bsh_tcd, _reg) 123 #define TCD_WRITE1(_sc, _reg, _val) \ 124 bus_space_write_1(_sc->bst_tcd, _sc->bsh_tcd, _reg, _val) 125 126 #define EDMA_NUM_DEVICES 2 127 #define EDMA_NUM_CHANNELS 32 128 #define NCHAN_PER_MUX 16 129 130 struct tcd_conf { 131 bus_addr_t saddr; 132 bus_addr_t daddr; 133 uint32_t nbytes; 134 uint32_t nmajor; 135 uint32_t majorelink; 136 uint32_t majorelinkch; 137 uint32_t esg; 138 uint32_t smod; 139 uint32_t dmod; 140 uint32_t soff; 141 uint32_t doff; 142 uint32_t ssize; 143 uint32_t dsize; 144 uint32_t slast; 145 uint32_t dlast_sga; 146 uint32_t channel; 147 uint32_t (*ih)(void *, int); 148 void *ih_user; 149 }; 150 151 /* 152 * TCD struct is described at 153 * Vybrid Reference Manual, Rev. 5, 07/2013 154 * 155 * Should be used for Scatter/Gathering feature. 156 */ 157 158 struct TCD { 159 uint32_t saddr; 160 uint16_t attr; 161 uint16_t soff; 162 uint32_t nbytes; 163 uint32_t slast; 164 uint32_t daddr; 165 uint16_t citer; 166 uint16_t doff; 167 uint32_t dlast_sga; 168 uint16_t biter; 169 uint16_t csr; 170 } __packed; 171 172 struct edma_softc { 173 device_t dev; 174 struct resource *res[4]; 175 bus_space_tag_t bst; 176 bus_space_handle_t bsh; 177 bus_space_tag_t bst_tcd; 178 bus_space_handle_t bsh_tcd; 179 void *tc_ih; 180 void *err_ih; 181 uint32_t device_id; 182 183 int (*channel_configure) (struct edma_softc *, int, int); 184 int (*channel_free) (struct edma_softc *, int); 185 int (*dma_request) (struct edma_softc *, int); 186 int (*dma_setup) (struct edma_softc *, struct tcd_conf *); 187 int (*dma_stop) (struct edma_softc *, int); 188 }; 189