1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | * sata_promise.h - Promise SATA common definitions and inline funcs |
4 | * |
5 | * Copyright 2003-2004 Red Hat, Inc. |
6 | * |
7 | * libata documentation is available via 'make {ps|pdf}docs', |
8 | * as Documentation/driver-api/libata.rst |
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 (struct ata_taskfile *tf, |
29 | dma_addr_t sg_table, |
30 | unsigned int devno, u8 *buf) |
31 | { |
32 | u8 dev_reg; |
33 | __le32 *buf32 = (__le32 *) buf; |
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 (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__ */ |
142 | |