1 | /* $NetBSD: sata_subr.c,v 1.21 2013/04/03 17:15:07 bouyer Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2004 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Jason R. Thorpe of Wasabi Systems, Inc. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | /* |
33 | * Common functions for Serial ATA. |
34 | */ |
35 | #include <sys/cdefs.h> |
36 | __KERNEL_RCSID(0, "$NetBSD: sata_subr.c,v 1.21 2013/04/03 17:15:07 bouyer Exp $" ); |
37 | |
38 | #include <sys/param.h> |
39 | #include <sys/kernel.h> |
40 | #include <sys/proc.h> |
41 | |
42 | #include <dev/ata/satareg.h> |
43 | #include <dev/ata/satavar.h> |
44 | #include <dev/ata/satapmpreg.h> |
45 | |
46 | /* |
47 | * sata_speed: |
48 | * |
49 | * Return a string describing the port speed reported by |
50 | * the port's SStatus register. |
51 | */ |
52 | const char * |
53 | sata_speed(uint32_t sstatus) |
54 | { |
55 | static const char * const sata_speedtab[] = { |
56 | "no negotiated speed" , |
57 | "1.5Gb/s" , |
58 | "3.0Gb/s" , |
59 | "6.0Gb/s" , |
60 | "<unknown 4>" , |
61 | "<unknown 5>" , |
62 | "<unknown 6>" , |
63 | "<unknown 7>" , |
64 | "<unknown 8>" , |
65 | "<unknown 9>" , |
66 | "<unknown 10>" , |
67 | "<unknown 11>" , |
68 | "<unknown 12>" , |
69 | "<unknown 13>" , |
70 | "<unknown 14>" , |
71 | "<unknown 15>" , |
72 | }; |
73 | |
74 | return (sata_speedtab[(sstatus & SStatus_SPD_mask) >> |
75 | SStatus_SPD_shift]); |
76 | } |
77 | |
78 | /* |
79 | * reset the PHY and bring it online |
80 | */ |
81 | uint32_t |
82 | sata_reset_interface(struct ata_channel *chp, bus_space_tag_t sata_t, |
83 | bus_space_handle_t scontrol_r, bus_space_handle_t sstatus_r, int flags) |
84 | { |
85 | uint32_t scontrol, sstatus; |
86 | int i; |
87 | |
88 | /* bring the PHYs online. |
89 | * The work-around for errata #1 of the Intel GD31244 says that we must |
90 | * write 0 to the port first to be sure of correctly initializing |
91 | * the device. It doesn't hurt for other devices. |
92 | */ |
93 | bus_space_write_4(sata_t, scontrol_r, 0, 0); |
94 | scontrol = SControl_IPM_NONE | SControl_SPD_ANY | SControl_DET_INIT; |
95 | bus_space_write_4 (sata_t, scontrol_r, 0, scontrol); |
96 | |
97 | ata_delay(50, "sataup" , flags); |
98 | scontrol &= ~SControl_DET_INIT; |
99 | bus_space_write_4(sata_t, scontrol_r, 0, scontrol); |
100 | |
101 | ata_delay(50, "sataup" , flags); |
102 | /* wait up to 1s for device to come up */ |
103 | for (i = 0; i < 100; i++) { |
104 | sstatus = bus_space_read_4(sata_t, sstatus_r, 0); |
105 | if ((sstatus & SStatus_DET_mask) == SStatus_DET_DEV) |
106 | break; |
107 | ata_delay(10, "sataup" , flags); |
108 | } |
109 | /* |
110 | * if we have a link up without device, wait a few more seconds |
111 | * for connection to establish |
112 | */ |
113 | if ((sstatus & SStatus_DET_mask) == SStatus_DET_DEV_NE) { |
114 | for (i = 0; i < 500; i++) { |
115 | ata_delay(10, "sataup" , flags); |
116 | sstatus = bus_space_read_4(sata_t, sstatus_r, 0); |
117 | if ((sstatus & SStatus_DET_mask) == SStatus_DET_DEV) |
118 | break; |
119 | } |
120 | } |
121 | |
122 | switch (sstatus & SStatus_DET_mask) { |
123 | case SStatus_DET_NODEV: |
124 | /* No Device; be silent. */ |
125 | break; |
126 | |
127 | case SStatus_DET_DEV_NE: |
128 | aprint_error("%s port %d: device connected, but " |
129 | "communication not established\n" , |
130 | device_xname(chp->ch_atac->atac_dev), chp->ch_channel); |
131 | break; |
132 | |
133 | case SStatus_DET_OFFLINE: |
134 | aprint_error("%s port %d: PHY offline\n" , |
135 | device_xname(chp->ch_atac->atac_dev), chp->ch_channel); |
136 | break; |
137 | |
138 | case SStatus_DET_DEV: |
139 | aprint_normal("%s port %d: device present, speed: %s\n" , |
140 | device_xname(chp->ch_atac->atac_dev), chp->ch_channel, |
141 | sata_speed(sstatus)); |
142 | break; |
143 | default: |
144 | aprint_error("%s port %d: unknown SStatus: 0x%08x\n" , |
145 | device_xname(chp->ch_atac->atac_dev), chp->ch_channel, |
146 | sstatus); |
147 | } |
148 | return(sstatus & SStatus_DET_mask); |
149 | } |
150 | |
151 | void |
152 | sata_interpret_sig(struct ata_channel *chp, int port, uint32_t sig) |
153 | { |
154 | int err; |
155 | int s; |
156 | |
157 | /* some ATAPI devices have bogus lower two bytes, sigh */ |
158 | if ((sig & 0xffff0000) == 0xeb140000) { |
159 | sig &= 0xffff0000; |
160 | sig |= 0x00000101; |
161 | } |
162 | if (chp->ch_drive == NULL) { |
163 | if (sig == 0x96690101) |
164 | err = atabus_alloc_drives(chp, PMP_MAX_DRIVES); |
165 | else |
166 | err = atabus_alloc_drives(chp, 1); |
167 | if (err) |
168 | return; |
169 | } |
170 | KASSERT(port < chp->ch_ndrives); |
171 | |
172 | s = splbio(); |
173 | switch(sig) { |
174 | case 0x96690101: |
175 | KASSERT(port == 0 || port == PMP_PORT_CTL); |
176 | chp->ch_drive[PMP_PORT_CTL].drive_type = ATA_DRIVET_PM; |
177 | break; |
178 | case 0xc33c0101: |
179 | aprint_verbose_dev(chp->atabus, "port %d is SEMB, ignored\n" , |
180 | port); |
181 | break; |
182 | case 0xeb140101: |
183 | chp->ch_drive[port].drive_type = ATA_DRIVET_ATAPI; |
184 | break; |
185 | case 0x00000101: |
186 | chp->ch_drive[port].drive_type = ATA_DRIVET_ATA; |
187 | break; |
188 | case 0xffffffff: |
189 | /* COMRESET time out */ |
190 | break; |
191 | default: |
192 | chp->ch_drive[port].drive_type = ATA_DRIVET_ATA; |
193 | aprint_verbose_dev(chp->atabus, |
194 | "Unrecognized signature 0x%08x on port %d. " |
195 | "Assuming it's a disk.\n" , sig, port); |
196 | break; |
197 | } |
198 | splx(s); |
199 | } |
200 | |