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| 1 | /* |
| 2 | * sata_promise.h - Promise SATA common definitions and inline funcs |
| 3 | * |
| 4 | * Copyright 2003-2004 Red Hat, Inc. |
| 5 | * |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2, or (at your option) |
| 10 | * any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; see the file COPYING. If not, write to |
| 19 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | * |
| 21 | * |
| 22 | * libata documentation is available via 'make {ps|pdf}docs', |
| 23 | * as Documentation/DocBook/libata.* |
| 24 | * |
| 25 | */ |
| 26 | |
| 27 | #ifndef __SATA_PROMISE_H__ |
| 28 | #define __SATA_PROMISE_H__ |
| 29 | |
| 30 | #include <linux/ata.h> |
| 31 | |
| 32 | enum pdc_packet_bits { |
| 33 | PDC_PKT_READ = (1 << 2), |
| 34 | PDC_PKT_NODATA = (1 << 3), |
| 35 | |
| 36 | PDC_PKT_SIZEMASK = (1 << 7) | (1 << 6) | (1 << 5), |
| 37 | PDC_PKT_CLEAR_BSY = (1 << 4), |
| 38 | PDC_PKT_WAIT_DRDY = (1 << 3) | (1 << 4), |
| 39 | PDC_LAST_REG = (1 << 3), |
| 40 | |
| 41 | PDC_REG_DEVCTL = (1 << 3) | (1 << 2) | (1 << 1), |
| 42 | }; |
| 43 | |
| 44 | static inline unsigned int pdc_pkt_header(struct ata_taskfile *tf, |
| 45 | dma_addr_t sg_table, |
| 46 | unsigned int devno, u8 *buf) |
| 47 | { |
| 48 | u8 dev_reg; |
| 49 | __le32 *buf32 = (__le32 *) buf; |
| 50 | |
| 51 | /* set control bits (byte 0), zero delay seq id (byte 3), |
| 52 | * and seq id (byte 2) |
| 53 | */ |
| 54 | switch (tf->protocol) { |
| 55 | case ATA_PROT_DMA: |
| 56 | if (!(tf->flags & ATA_TFLAG_WRITE)) |
| 57 | buf32[0] = cpu_to_le32(PDC_PKT_READ); |
| 58 | else |
| 59 | buf32[0] = 0; |
| 60 | break; |
| 61 | |
| 62 | case ATA_PROT_NODATA: |
| 63 | buf32[0] = cpu_to_le32(PDC_PKT_NODATA); |
| 64 | break; |
| 65 | |
| 66 | default: |
| 67 | BUG(); |
| 68 | break; |
| 69 | } |
| 70 | |
| 71 | buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */ |
| 72 | buf32[2] = 0; /* no next-packet */ |
| 73 | |
| 74 | if (devno == 0) |
| 75 | dev_reg = ATA_DEVICE_OBS; |
| 76 | else |
| 77 | dev_reg = ATA_DEVICE_OBS | ATA_DEV1; |
| 78 | |
| 79 | /* select device */ |
| 80 | buf[12] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE; |
| 81 | buf[13] = dev_reg; |
| 82 | |
| 83 | /* device control register */ |
| 84 | buf[14] = (1 << 5) | PDC_REG_DEVCTL; |
| 85 | buf[15] = tf->ctl; |
| 86 | |
| 87 | return 16; /* offset of next byte */ |
| 88 | } |
| 89 | |
| 90 | static inline unsigned int pdc_pkt_footer(struct ata_taskfile *tf, u8 *buf, |
| 91 | unsigned int i) |
| 92 | { |
| 93 | if (tf->flags & ATA_TFLAG_DEVICE) { |
| 94 | buf[i++] = (1 << 5) | ATA_REG_DEVICE; |
| 95 | buf[i++] = tf->device; |
| 96 | } |
| 97 | |
| 98 | /* and finally the command itself; also includes end-of-pkt marker */ |
| 99 | buf[i++] = (1 << 5) | PDC_LAST_REG | ATA_REG_CMD; |
| 100 | buf[i++] = tf->command; |
| 101 | |
| 102 | return i; |
| 103 | } |
| 104 | |
| 105 | static inline unsigned int pdc_prep_lba28(struct ata_taskfile *tf, u8 *buf, unsigned int i) |
| 106 | { |
| 107 | /* the "(1 << 5)" should be read "(count << 5)" */ |
| 108 | |
| 109 | /* ATA command block registers */ |
| 110 | buf[i++] = (1 << 5) | ATA_REG_FEATURE; |
| 111 | buf[i++] = tf->feature; |
| 112 | |
| 113 | buf[i++] = (1 << 5) | ATA_REG_NSECT; |
| 114 | buf[i++] = tf->nsect; |
| 115 | |
| 116 | buf[i++] = (1 << 5) | ATA_REG_LBAL; |
| 117 | buf[i++] = tf->lbal; |
| 118 | |
| 119 | buf[i++] = (1 << 5) | ATA_REG_LBAM; |
| 120 | buf[i++] = tf->lbam; |
| 121 | |
| 122 | buf[i++] = (1 << 5) | ATA_REG_LBAH; |
| 123 | buf[i++] = tf->lbah; |
| 124 | |
| 125 | return i; |
| 126 | } |
| 127 | |
| 128 | static inline unsigned int pdc_prep_lba48(struct ata_taskfile *tf, u8 *buf, unsigned int i) |
| 129 | { |
| 130 | /* the "(2 << 5)" should be read "(count << 5)" */ |
| 131 | |
| 132 | /* ATA command block registers */ |
| 133 | buf[i++] = (2 << 5) | ATA_REG_FEATURE; |
| 134 | buf[i++] = tf->hob_feature; |
| 135 | buf[i++] = tf->feature; |
| 136 | |
| 137 | buf[i++] = (2 << 5) | ATA_REG_NSECT; |
| 138 | buf[i++] = tf->hob_nsect; |
| 139 | buf[i++] = tf->nsect; |
| 140 | |
| 141 | buf[i++] = (2 << 5) | ATA_REG_LBAL; |
| 142 | buf[i++] = tf->hob_lbal; |
| 143 | buf[i++] = tf->lbal; |
| 144 | |
| 145 | buf[i++] = (2 << 5) | ATA_REG_LBAM; |
| 146 | buf[i++] = tf->hob_lbam; |
| 147 | buf[i++] = tf->lbam; |
| 148 | |
| 149 | buf[i++] = (2 << 5) | ATA_REG_LBAH; |
| 150 | buf[i++] = tf->hob_lbah; |
| 151 | buf[i++] = tf->lbah; |
| 152 | |
| 153 | return i; |
| 154 | } |
| 155 | |
| 156 | |
| 157 | #endif /* __SATA_PROMISE_H__ */ |
| 158 |
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