/* * sata_promise.h - Promise SATA common definitions and inline funcs * * Copyright 2003-2004 Red Hat, Inc. * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; see the file COPYING. If not, write to * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. * * * libata documentation is available via 'make {ps|pdf}docs', * as Documentation/DocBook/libata.* * */ #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; u32 *buf32 = (u32 *) 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__ */