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141 lines
3.1 KiB
141 lines
3.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* sata_promise.h - Promise SATA common definitions and inline funcs |
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* |
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* Copyright 2003-2004 Red Hat, Inc. |
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* |
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* libata documentation is available via 'make {ps|pdf}docs', |
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* as Documentation/driver-api/libata.rst |
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*/ |
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#ifndef __SATA_PROMISE_H__ |
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#define __SATA_PROMISE_H__ |
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#include <linux/ata.h> |
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enum pdc_packet_bits { |
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PDC_PKT_READ = (1 << 2), |
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PDC_PKT_NODATA = (1 << 3), |
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PDC_PKT_SIZEMASK = (1 << 7) | (1 << 6) | (1 << 5), |
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PDC_PKT_CLEAR_BSY = (1 << 4), |
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PDC_PKT_WAIT_DRDY = (1 << 3) | (1 << 4), |
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PDC_LAST_REG = (1 << 3), |
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PDC_REG_DEVCTL = (1 << 3) | (1 << 2) | (1 << 1), |
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}; |
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static inline unsigned int pdc_pkt_header(struct ata_taskfile *tf, |
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dma_addr_t sg_table, |
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unsigned int devno, u8 *buf) |
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{ |
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u8 dev_reg; |
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__le32 *buf32 = (__le32 *) buf; |
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/* set control bits (byte 0), zero delay seq id (byte 3), |
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* and seq id (byte 2) |
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*/ |
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switch (tf->protocol) { |
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case ATA_PROT_DMA: |
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if (!(tf->flags & ATA_TFLAG_WRITE)) |
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buf32[0] = cpu_to_le32(PDC_PKT_READ); |
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else |
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buf32[0] = 0; |
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break; |
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case ATA_PROT_NODATA: |
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buf32[0] = cpu_to_le32(PDC_PKT_NODATA); |
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break; |
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default: |
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BUG(); |
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break; |
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} |
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buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */ |
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buf32[2] = 0; /* no next-packet */ |
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if (devno == 0) |
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dev_reg = ATA_DEVICE_OBS; |
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else |
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dev_reg = ATA_DEVICE_OBS | ATA_DEV1; |
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/* select device */ |
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buf[12] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE; |
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buf[13] = dev_reg; |
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/* device control register */ |
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buf[14] = (1 << 5) | PDC_REG_DEVCTL; |
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buf[15] = tf->ctl; |
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return 16; /* offset of next byte */ |
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} |
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static inline unsigned int pdc_pkt_footer(struct ata_taskfile *tf, u8 *buf, |
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unsigned int i) |
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{ |
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if (tf->flags & ATA_TFLAG_DEVICE) { |
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buf[i++] = (1 << 5) | ATA_REG_DEVICE; |
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buf[i++] = tf->device; |
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} |
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/* and finally the command itself; also includes end-of-pkt marker */ |
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buf[i++] = (1 << 5) | PDC_LAST_REG | ATA_REG_CMD; |
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buf[i++] = tf->command; |
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return i; |
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} |
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static inline unsigned int pdc_prep_lba28(struct ata_taskfile *tf, u8 *buf, unsigned int i) |
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{ |
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/* the "(1 << 5)" should be read "(count << 5)" */ |
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/* ATA command block registers */ |
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buf[i++] = (1 << 5) | ATA_REG_FEATURE; |
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buf[i++] = tf->feature; |
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buf[i++] = (1 << 5) | ATA_REG_NSECT; |
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buf[i++] = tf->nsect; |
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buf[i++] = (1 << 5) | ATA_REG_LBAL; |
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buf[i++] = tf->lbal; |
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buf[i++] = (1 << 5) | ATA_REG_LBAM; |
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buf[i++] = tf->lbam; |
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buf[i++] = (1 << 5) | ATA_REG_LBAH; |
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buf[i++] = tf->lbah; |
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return i; |
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} |
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static inline unsigned int pdc_prep_lba48(struct ata_taskfile *tf, u8 *buf, unsigned int i) |
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{ |
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/* the "(2 << 5)" should be read "(count << 5)" */ |
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/* ATA command block registers */ |
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buf[i++] = (2 << 5) | ATA_REG_FEATURE; |
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buf[i++] = tf->hob_feature; |
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buf[i++] = tf->feature; |
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buf[i++] = (2 << 5) | ATA_REG_NSECT; |
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buf[i++] = tf->hob_nsect; |
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buf[i++] = tf->nsect; |
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buf[i++] = (2 << 5) | ATA_REG_LBAL; |
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buf[i++] = tf->hob_lbal; |
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buf[i++] = tf->lbal; |
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buf[i++] = (2 << 5) | ATA_REG_LBAM; |
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buf[i++] = tf->hob_lbam; |
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buf[i++] = tf->lbam; |
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buf[i++] = (2 << 5) | ATA_REG_LBAH; |
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buf[i++] = tf->hob_lbah; |
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buf[i++] = tf->lbah; |
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return i; |
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} |
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#endif /* __SATA_PROMISE_H__ */
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