1/*
2 * sata_promise.h - Promise SATA common definitions and inline funcs
3 *
4 * Copyright 2003-2004 Red Hat, Inc.
5 *
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; see the file COPYING. If not, write to
19 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
20 *
21 *
22 * libata documentation is available via 'make {ps|pdf}docs',
23 * as Documentation/driver-api/libata.rst
24 *
25 */
26
27#ifndef __SATA_PROMISE_H__
28#define __SATA_PROMISE_H__
29
30#include <linux/ata.h>
31
32enum pdc_packet_bits {
33 PDC_PKT_READ = (1 << 2),
34 PDC_PKT_NODATA = (1 << 3),
35
36 PDC_PKT_SIZEMASK = (1 << 7) | (1 << 6) | (1 << 5),
37 PDC_PKT_CLEAR_BSY = (1 << 4),
38 PDC_PKT_WAIT_DRDY = (1 << 3) | (1 << 4),
39 PDC_LAST_REG = (1 << 3),
40
41 PDC_REG_DEVCTL = (1 << 3) | (1 << 2) | (1 << 1),
42};
43
44static inline unsigned int pdc_pkt_header(struct ata_taskfile *tf,
45 dma_addr_t sg_table,
46 unsigned int devno, u8 *buf)
47{
48 u8 dev_reg;
49 __le32 *buf32 = (__le32 *) buf;
50
51 /* set control bits (byte 0), zero delay seq id (byte 3),
52 * and seq id (byte 2)
53 */
54 switch (tf->protocol) {
55 case ATA_PROT_DMA:
56 if (!(tf->flags & ATA_TFLAG_WRITE))
57 buf32[0] = cpu_to_le32(PDC_PKT_READ);
58 else
59 buf32[0] = 0;
60 break;
61
62 case ATA_PROT_NODATA:
63 buf32[0] = cpu_to_le32(PDC_PKT_NODATA);
64 break;
65
66 default:
67 BUG();
68 break;
69 }
70
71 buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */
72 buf32[2] = 0; /* no next-packet */
73
74 if (devno == 0)
75 dev_reg = ATA_DEVICE_OBS;
76 else
77 dev_reg = ATA_DEVICE_OBS | ATA_DEV1;
78
79 /* select device */
80 buf[12] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE;
81 buf[13] = dev_reg;
82
83 /* device control register */
84 buf[14] = (1 << 5) | PDC_REG_DEVCTL;
85 buf[15] = tf->ctl;
86
87 return 16; /* offset of next byte */
88}
89
90static inline unsigned int pdc_pkt_footer(struct ata_taskfile *tf, u8 *buf,
91 unsigned int i)
92{
93 if (tf->flags & ATA_TFLAG_DEVICE) {
94 buf[i++] = (1 << 5) | ATA_REG_DEVICE;
95 buf[i++] = tf->device;
96 }
97
98 /* and finally the command itself; also includes end-of-pkt marker */
99 buf[i++] = (1 << 5) | PDC_LAST_REG | ATA_REG_CMD;
100 buf[i++] = tf->command;
101
102 return i;
103}
104
105static inline unsigned int pdc_prep_lba28(struct ata_taskfile *tf, u8 *buf, unsigned int i)
106{
107 /* the "(1 << 5)" should be read "(count << 5)" */
108
109 /* ATA command block registers */
110 buf[i++] = (1 << 5) | ATA_REG_FEATURE;
111 buf[i++] = tf->feature;
112
113 buf[i++] = (1 << 5) | ATA_REG_NSECT;
114 buf[i++] = tf->nsect;
115
116 buf[i++] = (1 << 5) | ATA_REG_LBAL;
117 buf[i++] = tf->lbal;
118
119 buf[i++] = (1 << 5) | ATA_REG_LBAM;
120 buf[i++] = tf->lbam;
121
122 buf[i++] = (1 << 5) | ATA_REG_LBAH;
123 buf[i++] = tf->lbah;
124
125 return i;
126}
127
128static inline unsigned int pdc_prep_lba48(struct ata_taskfile *tf, u8 *buf, unsigned int i)
129{
130 /* the "(2 << 5)" should be read "(count << 5)" */
131
132 /* ATA command block registers */
133 buf[i++] = (2 << 5) | ATA_REG_FEATURE;
134 buf[i++] = tf->hob_feature;
135 buf[i++] = tf->feature;
136
137 buf[i++] = (2 << 5) | ATA_REG_NSECT;
138 buf[i++] = tf->hob_nsect;
139 buf[i++] = tf->nsect;
140
141 buf[i++] = (2 << 5) | ATA_REG_LBAL;
142 buf[i++] = tf->hob_lbal;
143 buf[i++] = tf->lbal;
144
145 buf[i++] = (2 << 5) | ATA_REG_LBAM;
146 buf[i++] = tf->hob_lbam;
147 buf[i++] = tf->lbam;
148
149 buf[i++] = (2 << 5) | ATA_REG_LBAH;
150 buf[i++] = tf->hob_lbah;
151 buf[i++] = tf->lbah;
152
153 return i;
154}
155
156
157#endif /* __SATA_PROMISE_H__ */
158