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-rw-r--r--drivers/ata/sata_promise.h141
1 files changed, 141 insertions, 0 deletions
diff --git a/drivers/ata/sata_promise.h b/drivers/ata/sata_promise.h
new file mode 100644
index 000000000..c81db140a
--- /dev/null
+++ b/drivers/ata/sata_promise.h
@@ -0,0 +1,141 @@
+/* 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__ */