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c82ee6d3 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | /* |
3 | * sata_promise.h - Promise SATA common definitions and inline funcs | |
4 | * | |
5 | * Copyright 2003-2004 Red Hat, Inc. | |
6 | * | |
af36d7f0 | 7 | * libata documentation is available via 'make {ps|pdf}docs', |
19285f3c | 8 | * as Documentation/driver-api/libata.rst |
1da177e4 LT |
9 | */ |
10 | ||
11 | #ifndef __SATA_PROMISE_H__ | |
12 | #define __SATA_PROMISE_H__ | |
13 | ||
14 | #include <linux/ata.h> | |
15 | ||
16 | enum pdc_packet_bits { | |
17 | PDC_PKT_READ = (1 << 2), | |
18 | PDC_PKT_NODATA = (1 << 3), | |
19 | ||
20 | PDC_PKT_SIZEMASK = (1 << 7) | (1 << 6) | (1 << 5), | |
21 | PDC_PKT_CLEAR_BSY = (1 << 4), | |
22 | PDC_PKT_WAIT_DRDY = (1 << 3) | (1 << 4), | |
23 | PDC_LAST_REG = (1 << 3), | |
24 | ||
25 | PDC_REG_DEVCTL = (1 << 3) | (1 << 2) | (1 << 1), | |
26 | }; | |
27 | ||
28 | static inline unsigned int pdc_pkt_header(struct ata_taskfile *tf, | |
29 | dma_addr_t sg_table, | |
30 | unsigned int devno, u8 *buf) | |
31 | { | |
32 | u8 dev_reg; | |
4ca4e439 | 33 | __le32 *buf32 = (__le32 *) buf; |
1da177e4 LT |
34 | |
35 | /* set control bits (byte 0), zero delay seq id (byte 3), | |
36 | * and seq id (byte 2) | |
37 | */ | |
38 | switch (tf->protocol) { | |
39 | case ATA_PROT_DMA: | |
40 | if (!(tf->flags & ATA_TFLAG_WRITE)) | |
41 | buf32[0] = cpu_to_le32(PDC_PKT_READ); | |
42 | else | |
43 | buf32[0] = 0; | |
44 | break; | |
45 | ||
46 | case ATA_PROT_NODATA: | |
47 | buf32[0] = cpu_to_le32(PDC_PKT_NODATA); | |
48 | break; | |
49 | ||
50 | default: | |
51 | BUG(); | |
52 | break; | |
53 | } | |
54 | ||
55 | buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */ | |
56 | buf32[2] = 0; /* no next-packet */ | |
57 | ||
58 | if (devno == 0) | |
59 | dev_reg = ATA_DEVICE_OBS; | |
60 | else | |
61 | dev_reg = ATA_DEVICE_OBS | ATA_DEV1; | |
62 | ||
63 | /* select device */ | |
64 | buf[12] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE; | |
65 | buf[13] = dev_reg; | |
66 | ||
67 | /* device control register */ | |
68 | buf[14] = (1 << 5) | PDC_REG_DEVCTL; | |
69 | buf[15] = tf->ctl; | |
70 | ||
71 | return 16; /* offset of next byte */ | |
72 | } | |
73 | ||
74 | static inline unsigned int pdc_pkt_footer(struct ata_taskfile *tf, u8 *buf, | |
75 | unsigned int i) | |
76 | { | |
77 | if (tf->flags & ATA_TFLAG_DEVICE) { | |
78 | buf[i++] = (1 << 5) | ATA_REG_DEVICE; | |
79 | buf[i++] = tf->device; | |
80 | } | |
81 | ||
82 | /* and finally the command itself; also includes end-of-pkt marker */ | |
83 | buf[i++] = (1 << 5) | PDC_LAST_REG | ATA_REG_CMD; | |
84 | buf[i++] = tf->command; | |
85 | ||
86 | return i; | |
87 | } | |
88 | ||
89 | static inline unsigned int pdc_prep_lba28(struct ata_taskfile *tf, u8 *buf, unsigned int i) | |
90 | { | |
91 | /* the "(1 << 5)" should be read "(count << 5)" */ | |
92 | ||
93 | /* ATA command block registers */ | |
94 | buf[i++] = (1 << 5) | ATA_REG_FEATURE; | |
95 | buf[i++] = tf->feature; | |
96 | ||
97 | buf[i++] = (1 << 5) | ATA_REG_NSECT; | |
98 | buf[i++] = tf->nsect; | |
99 | ||
100 | buf[i++] = (1 << 5) | ATA_REG_LBAL; | |
101 | buf[i++] = tf->lbal; | |
102 | ||
103 | buf[i++] = (1 << 5) | ATA_REG_LBAM; | |
104 | buf[i++] = tf->lbam; | |
105 | ||
106 | buf[i++] = (1 << 5) | ATA_REG_LBAH; | |
107 | buf[i++] = tf->lbah; | |
108 | ||
109 | return i; | |
110 | } | |
111 | ||
112 | static inline unsigned int pdc_prep_lba48(struct ata_taskfile *tf, u8 *buf, unsigned int i) | |
113 | { | |
114 | /* the "(2 << 5)" should be read "(count << 5)" */ | |
115 | ||
116 | /* ATA command block registers */ | |
117 | buf[i++] = (2 << 5) | ATA_REG_FEATURE; | |
118 | buf[i++] = tf->hob_feature; | |
119 | buf[i++] = tf->feature; | |
120 | ||
121 | buf[i++] = (2 << 5) | ATA_REG_NSECT; | |
122 | buf[i++] = tf->hob_nsect; | |
123 | buf[i++] = tf->nsect; | |
124 | ||
125 | buf[i++] = (2 << 5) | ATA_REG_LBAL; | |
126 | buf[i++] = tf->hob_lbal; | |
127 | buf[i++] = tf->lbal; | |
128 | ||
129 | buf[i++] = (2 << 5) | ATA_REG_LBAM; | |
130 | buf[i++] = tf->hob_lbam; | |
131 | buf[i++] = tf->lbam; | |
132 | ||
133 | buf[i++] = (2 << 5) | ATA_REG_LBAH; | |
134 | buf[i++] = tf->hob_lbah; | |
135 | buf[i++] = tf->lbah; | |
136 | ||
137 | return i; | |
138 | } | |
139 | ||
140 | ||
141 | #endif /* __SATA_PROMISE_H__ */ |