1 /* $NetBSD: sata_subr.c,v 1.9 2007/12/11 11:38:15 lukem 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Common functions for Serial ATA. 41 */ 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: sata_subr.c,v 1.9 2007/12/11 11:38:15 lukem Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/kernel.h> 47 #include <sys/proc.h> 48 49 #include <dev/ata/satareg.h> 50 #include <dev/ata/satavar.h> 51 52 /* 53 * sata_speed: 54 * 55 * Return a string describing the port speed reported by 56 * the port's SStatus register. 57 */ 58 const char * 59 sata_speed(uint32_t sstatus) 60 { 61 static const char *sata_speedtab[] = { 62 "no negotiated speed", 63 "1.5Gb/s", 64 "3.0Gb/s", 65 "<unknown 3>", 66 "<unknown 4>", 67 "<unknown 5>", 68 "<unknown 6>", 69 "<unknown 7>", 70 "<unknown 8>", 71 "<unknown 9>", 72 "<unknown 10>", 73 "<unknown 11>", 74 "<unknown 12>", 75 "<unknown 13>", 76 "<unknown 14>", 77 "<unknown 15>", 78 }; 79 80 return (sata_speedtab[(sstatus & SStatus_SPD_mask) >> 81 SStatus_SPD_shift]); 82 } 83 84 /* 85 * reset the PHY and bring it online 86 */ 87 uint32_t 88 sata_reset_interface(struct ata_channel *chp, bus_space_tag_t sata_t, 89 bus_space_handle_t scontrol_r, bus_space_handle_t sstatus_r) 90 { 91 uint32_t scontrol, sstatus; 92 int i; 93 94 /* bring the PHYs online. 95 * The work-around for errata #1 for the 31244 says that we must 96 * write 0 to the port first to be sure of correctly initializing 97 * the device. It doesn't hurt for other devices. 98 */ 99 bus_space_write_4(sata_t, scontrol_r, 0, 0); 100 scontrol = SControl_IPM_NONE | SControl_SPD_ANY | SControl_DET_INIT; 101 bus_space_write_4 (sata_t, scontrol_r, 0, scontrol); 102 103 tsleep(chp, PRIBIO, "sataup", mstohz(50)); 104 scontrol &= ~SControl_DET_INIT; 105 bus_space_write_4(sata_t, scontrol_r, 0, scontrol); 106 107 tsleep(chp, PRIBIO, "sataup", mstohz(50)); 108 /* wait up to 1s for device to come up */ 109 for (i = 0; i < 100; i++) { 110 sstatus = bus_space_read_4(sata_t, sstatus_r, 0); 111 if ((sstatus & SStatus_DET_mask) == SStatus_DET_DEV) 112 break; 113 tsleep(chp, PRIBIO, "sataup", mstohz(10)); 114 } 115 116 switch (sstatus & SStatus_DET_mask) { 117 case SStatus_DET_NODEV: 118 /* No Device; be silent. */ 119 break; 120 121 case SStatus_DET_DEV_NE: 122 aprint_error("%s port %d: device connected, but " 123 "communication not established\n", 124 chp->ch_atac->atac_dev.dv_xname, chp->ch_channel); 125 break; 126 127 case SStatus_DET_OFFLINE: 128 aprint_error("%s port %d: PHY offline\n", 129 chp->ch_atac->atac_dev.dv_xname, chp->ch_channel); 130 break; 131 132 case SStatus_DET_DEV: 133 aprint_normal("%s port %d: device present, speed: %s\n", 134 chp->ch_atac->atac_dev.dv_xname, chp->ch_channel, 135 sata_speed(sstatus)); 136 break; 137 default: 138 aprint_error("%s port %d: unknown SStatus: 0x%08x\n", 139 chp->ch_atac->atac_dev.dv_xname, chp->ch_channel, 140 sstatus); 141 } 142 return(sstatus & SStatus_DET_mask); 143 } 144