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sata_promise.h
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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/DocBook/libata.*
24  *
25  */
26 
27 #ifndef __SATA_PROMISE_H__
28 #define __SATA_PROMISE_H__
29 
30 #include <linux/ata.h>
31 
32 enum 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 
44 static 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 
90 static 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 
105 static 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 
128 static 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__ */
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