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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 | /* * sata_promise.h - Promise SATA common definitions and inline funcs * * Copyright 2003-2004 Red Hat, Inc. * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that 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; see the file COPYING. If not, write to * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. * * * libata documentation is available via 'make {ps|pdf}docs', * as Documentation/driver-api/libata.rst * */ #ifndef __SATA_PROMISE_H__ #define __SATA_PROMISE_H__ #include <linux/ata.h> enum pdc_packet_bits { PDC_PKT_READ = (1 << 2), PDC_PKT_NODATA = (1 << 3), PDC_PKT_SIZEMASK = (1 << 7) | (1 << 6) | (1 << 5), PDC_PKT_CLEAR_BSY = (1 << 4), PDC_PKT_WAIT_DRDY = (1 << 3) | (1 << 4), PDC_LAST_REG = (1 << 3), PDC_REG_DEVCTL = (1 << 3) | (1 << 2) | (1 << 1), }; static inline unsigned int pdc_pkt_header(struct ata_taskfile *tf, dma_addr_t sg_table, unsigned int devno, u8 *buf) { u8 dev_reg; __le32 *buf32 = (__le32 *) buf; /* set control bits (byte 0), zero delay seq id (byte 3), * and seq id (byte 2) */ switch (tf->protocol) { case ATA_PROT_DMA: if (!(tf->flags & ATA_TFLAG_WRITE)) buf32[0] = cpu_to_le32(PDC_PKT_READ); else buf32[0] = 0; break; case ATA_PROT_NODATA: buf32[0] = cpu_to_le32(PDC_PKT_NODATA); break; default: BUG(); break; } buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */ buf32[2] = 0; /* no next-packet */ if (devno == 0) dev_reg = ATA_DEVICE_OBS; else dev_reg = ATA_DEVICE_OBS | ATA_DEV1; /* select device */ buf[12] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE; buf[13] = dev_reg; /* device control register */ buf[14] = (1 << 5) | PDC_REG_DEVCTL; buf[15] = tf->ctl; return 16; /* offset of next byte */ } static inline unsigned int pdc_pkt_footer(struct ata_taskfile *tf, u8 *buf, unsigned int i) { if (tf->flags & ATA_TFLAG_DEVICE) { buf[i++] = (1 << 5) | ATA_REG_DEVICE; buf[i++] = tf->device; } /* and finally the command itself; also includes end-of-pkt marker */ buf[i++] = (1 << 5) | PDC_LAST_REG | ATA_REG_CMD; buf[i++] = tf->command; return i; } static inline unsigned int pdc_prep_lba28(struct ata_taskfile *tf, u8 *buf, unsigned int i) { /* the "(1 << 5)" should be read "(count << 5)" */ /* ATA command block registers */ buf[i++] = (1 << 5) | ATA_REG_FEATURE; buf[i++] = tf->feature; buf[i++] = (1 << 5) | ATA_REG_NSECT; buf[i++] = tf->nsect; buf[i++] = (1 << 5) | ATA_REG_LBAL; buf[i++] = tf->lbal; buf[i++] = (1 << 5) | ATA_REG_LBAM; buf[i++] = tf->lbam; buf[i++] = (1 << 5) | ATA_REG_LBAH; buf[i++] = tf->lbah; return i; } static inline unsigned int pdc_prep_lba48(struct ata_taskfile *tf, u8 *buf, unsigned int i) { /* the "(2 << 5)" should be read "(count << 5)" */ /* ATA command block registers */ buf[i++] = (2 << 5) | ATA_REG_FEATURE; buf[i++] = tf->hob_feature; buf[i++] = tf->feature; buf[i++] = (2 << 5) | ATA_REG_NSECT; buf[i++] = tf->hob_nsect; buf[i++] = tf->nsect; buf[i++] = (2 << 5) | ATA_REG_LBAL; buf[i++] = tf->hob_lbal; buf[i++] = tf->lbal; buf[i++] = (2 << 5) | ATA_REG_LBAM; buf[i++] = tf->hob_lbam; buf[i++] = tf->lbam; buf[i++] = (2 << 5) | ATA_REG_LBAH; buf[i++] = tf->hob_lbah; buf[i++] = tf->lbah; return i; } #endif /* __SATA_PROMISE_H__ */ |