smbconf.c (119419) | smbconf.c (162234) |
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1/*- 2 * Copyright (c) 1998, 2001 Nicolas Souchu 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 13 unchanged lines hidden (view full) --- 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * 27 */ 28 29#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 1998, 2001 Nicolas Souchu 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 13 unchanged lines hidden (view full) --- 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * 27 */ 28 29#include <sys/cdefs.h> |
30__FBSDID("$FreeBSD: head/sys/dev/smbus/smbconf.c 119419 2003-08-24 18:03:45Z obrien $"); | 30__FBSDID("$FreeBSD: head/sys/dev/smbus/smbconf.c 162234 2006-09-11 20:52:41Z jhb $"); |
31#include <sys/param.h> 32#include <sys/systm.h> | 31#include <sys/param.h> 32#include <sys/systm.h> |
33#include <sys/lock.h> |
|
33#include <sys/module.h> | 34#include <sys/module.h> |
35#include <sys/mutex.h> |
|
34#include <sys/bus.h> 35 36#include <dev/smbus/smbconf.h> 37#include <dev/smbus/smbus.h> 38#include "smbus_if.h" 39 40/* 41 * smbus_intr() 42 */ 43void 44smbus_intr(device_t bus, u_char devaddr, char low, char high, int error) 45{ | 36#include <sys/bus.h> 37 38#include <dev/smbus/smbconf.h> 39#include <dev/smbus/smbus.h> 40#include "smbus_if.h" 41 42/* 43 * smbus_intr() 44 */ 45void 46smbus_intr(device_t bus, u_char devaddr, char low, char high, int error) 47{ |
46 struct smbus_softc *sc = (struct smbus_softc *)device_get_softc(bus); | 48 struct smbus_softc *sc = device_get_softc(bus); |
47 48 /* call owner's intr routine */ | 49 50 /* call owner's intr routine */ |
51 mtx_lock(&sc->lock); |
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49 if (sc->owner) 50 SMBUS_INTR(sc->owner, devaddr, low, high, error); | 52 if (sc->owner) 53 SMBUS_INTR(sc->owner, devaddr, low, high, error); |
51 52 return; | 54 mtx_unlock(&sc->lock); |
53} 54 55/* 56 * smbus_error() 57 * 58 * Converts an smbus error to a unix error. 59 */ 60int 61smbus_error(int smb_error) 62{ 63 int error = 0; 64 65 if (smb_error == SMB_ENOERR) 66 return (0); 67 | 55} 56 57/* 58 * smbus_error() 59 * 60 * Converts an smbus error to a unix error. 61 */ 62int 63smbus_error(int smb_error) 64{ 65 int error = 0; 66 67 if (smb_error == SMB_ENOERR) 68 return (0); 69 |
68 if (smb_error & (SMB_ENOTSUPP)) { | 70 if (smb_error & (SMB_ENOTSUPP)) |
69 error = ENODEV; | 71 error = ENODEV; |
70 } else if (smb_error & (SMB_ENOACK)) { | 72 else if (smb_error & (SMB_ENOACK)) |
71 error = ENXIO; | 73 error = ENXIO; |
72 } else if (smb_error & (SMB_ETIMEOUT)) { | 74 else if (smb_error & (SMB_ETIMEOUT)) |
73 error = EWOULDBLOCK; | 75 error = EWOULDBLOCK; |
74 } else if (smb_error & (SMB_EBUSY)) { | 76 else if (smb_error & (SMB_EBUSY)) |
75 error = EBUSY; | 77 error = EBUSY; |
76 } else { | 78 else if (smb_error & (SMB_EABORT | SMB_EBUSERR | SMB_ECOLLI)) 79 error = EIO; 80 else |
77 error = EINVAL; | 81 error = EINVAL; |
78 } | |
79 80 return (error); 81} 82 83static int 84smbus_poll(struct smbus_softc *sc, int how) 85{ 86 int error; 87 88 switch (how) { | 82 83 return (error); 84} 85 86static int 87smbus_poll(struct smbus_softc *sc, int how) 88{ 89 int error; 90 91 switch (how) { |
89 case (SMB_WAIT | SMB_INTR): 90 error = tsleep(sc, SMBPRI|PCATCH, "smbreq", 0); | 92 case SMB_WAIT | SMB_INTR: 93 error = msleep(sc, &sc->lock, SMBPRI|PCATCH, "smbreq", 0); |
91 break; 92 | 94 break; 95 |
93 case (SMB_WAIT | SMB_NOINTR): 94 error = tsleep(sc, SMBPRI, "smbreq", 0); | 96 case SMB_WAIT | SMB_NOINTR: 97 error = msleep(sc, &sc->lock, SMBPRI, "smbreq", 0); |
95 break; 96 97 default: | 98 break; 99 100 default: |
98 return (EWOULDBLOCK); | 101 error = EWOULDBLOCK; |
99 break; 100 } 101 102 return (error); 103} 104 105/* 106 * smbus_request_bus() 107 * 108 * Allocate the device to perform transfers. 109 * 110 * how : SMB_WAIT or SMB_DONTWAIT 111 */ 112int 113smbus_request_bus(device_t bus, device_t dev, int how) 114{ | 102 break; 103 } 104 105 return (error); 106} 107 108/* 109 * smbus_request_bus() 110 * 111 * Allocate the device to perform transfers. 112 * 113 * how : SMB_WAIT or SMB_DONTWAIT 114 */ 115int 116smbus_request_bus(device_t bus, device_t dev, int how) 117{ |
115 struct smbus_softc *sc = (struct smbus_softc *)device_get_softc(bus); 116 int s, error = 0; | 118 struct smbus_softc *sc = device_get_softc(bus); 119 device_t parent; 120 int error; |
117 118 /* first, ask the underlying layers if the request is ok */ | 121 122 /* first, ask the underlying layers if the request is ok */ |
123 parent = device_get_parent(bus); 124 mtx_lock(&sc->lock); |
|
119 do { | 125 do { |
120 error = SMBUS_CALLBACK(device_get_parent(bus), 121 SMB_REQUEST_BUS, (caddr_t)&how); | 126 mtx_unlock(&sc->lock); 127 error = SMBUS_CALLBACK(parent, SMB_REQUEST_BUS, &how); 128 mtx_lock(&sc->lock); 129 |
122 if (error) 123 error = smbus_poll(sc, how); 124 } while (error == EWOULDBLOCK); 125 | 130 if (error) 131 error = smbus_poll(sc, how); 132 } while (error == EWOULDBLOCK); 133 |
126 while (!error) { 127 s = splhigh(); 128 if (sc->owner && sc->owner != dev) { 129 splx(s); 130 | 134 while (error == 0) { 135 if (sc->owner && sc->owner != dev) |
131 error = smbus_poll(sc, how); | 136 error = smbus_poll(sc, how); |
132 } else { | 137 else { |
133 sc->owner = dev; | 138 sc->owner = dev; |
134 135 splx(s); 136 return (0); | 139 break; |
137 } 138 139 /* free any allocated resource */ | 140 } 141 142 /* free any allocated resource */ |
140 if (error) 141 SMBUS_CALLBACK(device_get_parent(bus), SMB_RELEASE_BUS, 142 (caddr_t)&how); | 143 if (error) { 144 mtx_unlock(&sc->lock); 145 SMBUS_CALLBACK(parent, SMB_RELEASE_BUS, &how); 146 return (error); 147 } |
143 } | 148 } |
149 mtx_unlock(&sc->lock); |
|
144 145 return (error); 146} 147 148/* 149 * smbus_release_bus() 150 * 151 * Release the device allocated with smbus_request_dev() 152 */ 153int 154smbus_release_bus(device_t bus, device_t dev) 155{ | 150 151 return (error); 152} 153 154/* 155 * smbus_release_bus() 156 * 157 * Release the device allocated with smbus_request_dev() 158 */ 159int 160smbus_release_bus(device_t bus, device_t dev) 161{ |
156 struct smbus_softc *sc = (struct smbus_softc *)device_get_softc(bus); 157 int s, error; | 162 struct smbus_softc *sc = device_get_softc(bus); 163 int error; |
158 159 /* first, ask the underlying layers if the release is ok */ 160 error = SMBUS_CALLBACK(device_get_parent(bus), SMB_RELEASE_BUS, NULL); 161 162 if (error) 163 return (error); 164 | 164 165 /* first, ask the underlying layers if the release is ok */ 166 error = SMBUS_CALLBACK(device_get_parent(bus), SMB_RELEASE_BUS, NULL); 167 168 if (error) 169 return (error); 170 |
165 s = splhigh(); 166 if (sc->owner != dev) { 167 splx(s); 168 return (EACCES); 169 } | 171 mtx_lock(&sc->lock); 172 if (sc->owner == dev) { 173 sc->owner = NULL; |
170 | 174 |
171 sc->owner = 0; 172 splx(s); | 175 /* wakeup waiting processes */ 176 wakeup(sc); 177 } else 178 error = EACCES; 179 mtx_unlock(&sc->lock); |
173 | 180 |
174 /* wakeup waiting processes */ 175 wakeup(sc); 176 177 return (0); | 181 return (error); |
178} | 182} |