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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * sata_promise.h - Promise SATA common definitions and inline funcs4 *5 * Copyright 2003-2004 Red Hat, Inc.6 *7 * libata documentation is available via 'make {ps|pdf}docs',8 * as Documentation/driver-api/libata.rst9 */10 11#ifndef __SATA_PROMISE_H__12#define __SATA_PROMISE_H__13 14#include <linux/ata.h>15 16enum pdc_packet_bits {17 PDC_PKT_READ = (1 << 2),18 PDC_PKT_NODATA = (1 << 3),19 20 PDC_PKT_SIZEMASK = (1 << 7) | (1 << 6) | (1 << 5),21 PDC_PKT_CLEAR_BSY = (1 << 4),22 PDC_PKT_WAIT_DRDY = (1 << 3) | (1 << 4),23 PDC_LAST_REG = (1 << 3),24 25 PDC_REG_DEVCTL = (1 << 3) | (1 << 2) | (1 << 1),26};27 28static inline unsigned int pdc_pkt_header(struct ata_taskfile *tf,29 dma_addr_t sg_table,30 unsigned int devno, u8 *buf)31{32 u8 dev_reg;33 __le32 *buf32 = (__le32 *) buf;34 35 /* set control bits (byte 0), zero delay seq id (byte 3),36 * and seq id (byte 2)37 */38 switch (tf->protocol) {39 case ATA_PROT_DMA:40 if (!(tf->flags & ATA_TFLAG_WRITE))41 buf32[0] = cpu_to_le32(PDC_PKT_READ);42 else43 buf32[0] = 0;44 break;45 46 case ATA_PROT_NODATA:47 buf32[0] = cpu_to_le32(PDC_PKT_NODATA);48 break;49 50 default:51 BUG();52 break;53 }54 55 buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */56 buf32[2] = 0; /* no next-packet */57 58 if (devno == 0)59 dev_reg = ATA_DEVICE_OBS;60 else61 dev_reg = ATA_DEVICE_OBS | ATA_DEV1;62 63 /* select device */64 buf[12] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE;65 buf[13] = dev_reg;66 67 /* device control register */68 buf[14] = (1 << 5) | PDC_REG_DEVCTL;69 buf[15] = tf->ctl;70 71 return 16; /* offset of next byte */72}73 74static inline unsigned int pdc_pkt_footer(struct ata_taskfile *tf, u8 *buf,75 unsigned int i)76{77 if (tf->flags & ATA_TFLAG_DEVICE) {78 buf[i++] = (1 << 5) | ATA_REG_DEVICE;79 buf[i++] = tf->device;80 }81 82 /* and finally the command itself; also includes end-of-pkt marker */83 buf[i++] = (1 << 5) | PDC_LAST_REG | ATA_REG_CMD;84 buf[i++] = tf->command;85 86 return i;87}88 89static inline unsigned int pdc_prep_lba28(struct ata_taskfile *tf, u8 *buf, unsigned int i)90{91 /* the "(1 << 5)" should be read "(count << 5)" */92 93 /* ATA command block registers */94 buf[i++] = (1 << 5) | ATA_REG_FEATURE;95 buf[i++] = tf->feature;96 97 buf[i++] = (1 << 5) | ATA_REG_NSECT;98 buf[i++] = tf->nsect;99 100 buf[i++] = (1 << 5) | ATA_REG_LBAL;101 buf[i++] = tf->lbal;102 103 buf[i++] = (1 << 5) | ATA_REG_LBAM;104 buf[i++] = tf->lbam;105 106 buf[i++] = (1 << 5) | ATA_REG_LBAH;107 buf[i++] = tf->lbah;108 109 return i;110}111 112static inline unsigned int pdc_prep_lba48(struct ata_taskfile *tf, u8 *buf, unsigned int i)113{114 /* the "(2 << 5)" should be read "(count << 5)" */115 116 /* ATA command block registers */117 buf[i++] = (2 << 5) | ATA_REG_FEATURE;118 buf[i++] = tf->hob_feature;119 buf[i++] = tf->feature;120 121 buf[i++] = (2 << 5) | ATA_REG_NSECT;122 buf[i++] = tf->hob_nsect;123 buf[i++] = tf->nsect;124 125 buf[i++] = (2 << 5) | ATA_REG_LBAL;126 buf[i++] = tf->hob_lbal;127 buf[i++] = tf->lbal;128 129 buf[i++] = (2 << 5) | ATA_REG_LBAM;130 buf[i++] = tf->hob_lbam;131 buf[i++] = tf->lbam;132 133 buf[i++] = (2 << 5) | ATA_REG_LBAH;134 buf[i++] = tf->hob_lbah;135 buf[i++] = tf->lbah;136 137 return i;138}139 140 141#endif /* __SATA_PROMISE_H__ */142