/* 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__ */
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¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-09-29)
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