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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__ */ |
158 |
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