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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 | /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * sata_promise.h - Promise SATA common definitions and inline funcs * * Copyright 2003-2004 Red Hat, Inc. * * 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__ */ |