1 /* $NetBSD: sata_subr.c,v 1.14 2010/12/12 00:38:07 jakllsch 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 1.14 2010/12/12 00:38:07 jakllsch 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 45 /* 46 * sata_speed: 47 * 48 * Return a string describing the port speed reported by 49 * the port's SStatus register. 50 */ 51 const char * 52 sata_speed(uint32_t sstatus) 53 { 54 static const char * const sata_speedtab[] = { 55 "no negotiated speed", 56 "1.5Gb/s", 57 "3.0Gb/s", 58 "6.0Gb/s", 59 "<unknown 4>", 60 "<unknown 5>", 61 "<unknown 6>", 62 "<unknown 7>", 63 "<unknown 8>", 64 "<unknown 9>", 65 "<unknown 10>", 66 "<unknown 11>", 67 "<unknown 12>", 68 "<unknown 13>", 69 "<unknown 14>", 70 "<unknown 15>", 71 }; 72 73 return (sata_speedtab[(sstatus & SStatus_SPD_mask) >> 74 SStatus_SPD_shift]); 75 } 76 77 /* 78 * reset the PHY and bring it online 79 */ 80 uint32_t 81 sata_reset_interface(struct ata_channel *chp, bus_space_tag_t sata_t, 82 bus_space_handle_t scontrol_r, bus_space_handle_t sstatus_r) 83 { 84 uint32_t scontrol, sstatus; 85 int i; 86 87 /* bring the PHYs online. 88 * The work-around for errata #1 of the Intel GD31244 says that we must 89 * write 0 to the port first to be sure of correctly initializing 90 * the device. It doesn't hurt for other devices. 91 */ 92 bus_space_write_4(sata_t, scontrol_r, 0, 0); 93 scontrol = SControl_IPM_NONE | SControl_SPD_ANY | SControl_DET_INIT; 94 bus_space_write_4 (sata_t, scontrol_r, 0, scontrol); 95 96 tsleep(chp, PRIBIO, "sataup", mstohz(50)); 97 scontrol &= ~SControl_DET_INIT; 98 bus_space_write_4(sata_t, scontrol_r, 0, scontrol); 99 100 tsleep(chp, PRIBIO, "sataup", mstohz(50)); 101 /* wait up to 1s for device to come up */ 102 for (i = 0; i < 100; i++) { 103 sstatus = bus_space_read_4(sata_t, sstatus_r, 0); 104 if ((sstatus & SStatus_DET_mask) == SStatus_DET_DEV) 105 break; 106 tsleep(chp, PRIBIO, "sataup", mstohz(10)); 107 } 108 109 switch (sstatus & SStatus_DET_mask) { 110 case SStatus_DET_NODEV: 111 /* No Device; be silent. */ 112 break; 113 114 case SStatus_DET_DEV_NE: 115 aprint_error("%s port %d: device connected, but " 116 "communication not established\n", 117 device_xname(chp->ch_atac->atac_dev), chp->ch_channel); 118 break; 119 120 case SStatus_DET_OFFLINE: 121 aprint_error("%s port %d: PHY offline\n", 122 device_xname(chp->ch_atac->atac_dev), chp->ch_channel); 123 break; 124 125 case SStatus_DET_DEV: 126 aprint_normal("%s port %d: device present, speed: %s\n", 127 device_xname(chp->ch_atac->atac_dev), chp->ch_channel, 128 sata_speed(sstatus)); 129 break; 130 default: 131 aprint_error("%s port %d: unknown SStatus: 0x%08x\n", 132 device_xname(chp->ch_atac->atac_dev), chp->ch_channel, 133 sstatus); 134 } 135 return(sstatus & SStatus_DET_mask); 136 } 137