| 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 | |