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/driver-api/libata.rst 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