iicbus.c (38775) | iicbus.c (40782) |
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1/*- 2 * Copyright (c) 1998 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 --- 9 unchanged lines hidden (view full) --- 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 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 * | 1/*- 2 * Copyright (c) 1998 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 --- 9 unchanged lines hidden (view full) --- 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 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 * $Id: iicbus.c,v 1.1.2.7 1998/08/29 16:54:16 son Exp $ | 26 * $Id: iicbus.c,v 1.1.1.1 1998/09/03 20:51:50 nsouch Exp $ |
27 * 28 */ 29 30/* 31 * Autoconfiguration and support routines for the Philips serial I2C bus 32 */ 33 34#include <sys/param.h> --- 14 unchanged lines hidden (view full) --- 49/* 50 * structure used to attach devices to the I2C bus 51 */ 52struct iicbus_device { 53 const char *iicd_name; /* device name */ 54 int iicd_class; /* driver or slave device class */ 55 const char *iicd_desc; /* device descriptor */ 56 u_char iicd_addr; /* address of the device */ | 27 * 28 */ 29 30/* 31 * Autoconfiguration and support routines for the Philips serial I2C bus 32 */ 33 34#include <sys/param.h> --- 14 unchanged lines hidden (view full) --- 49/* 50 * structure used to attach devices to the I2C bus 51 */ 52struct iicbus_device { 53 const char *iicd_name; /* device name */ 54 int iicd_class; /* driver or slave device class */ 55 const char *iicd_desc; /* device descriptor */ 56 u_char iicd_addr; /* address of the device */ |
57 int iicd_waitack; /* wait for ack timeout or delay */ |
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57 int iicd_alive; /* 1 if device found */ 58}; 59 60/* 61 * Common I2C addresses 62 */ 63#define I2C_GENERAL_CALL 0x0 | 58 int iicd_alive; /* 1 if device found */ 59}; 60 61/* 62 * Common I2C addresses 63 */ 64#define I2C_GENERAL_CALL 0x0 |
64#define I2C_MASTER_ADDRESS 0xaa 65#define I2C_INET_ADDRESS 0xaa | 65#define PCF_MASTER_ADDRESS 0xaa 66#define FIRST_SLAVE_ADDR 0x2 |
66 67#define MAXSLAVE 256 68 69#define IICBUS_UNKNOWN_CLASS 0 70#define IICBUS_DEVICE_CLASS 1 71#define IICBUS_DRIVER_CLASS 2 72 73/* 74 * list of known devices 75 */ 76struct iicbus_device iicbus_children[] = { | 67 68#define MAXSLAVE 256 69 70#define IICBUS_UNKNOWN_CLASS 0 71#define IICBUS_DEVICE_CLASS 1 72#define IICBUS_DRIVER_CLASS 2 73 74/* 75 * list of known devices 76 */ 77struct iicbus_device iicbus_children[] = { |
77 { "iic", IICBUS_DRIVER_CLASS, "General Call", I2C_GENERAL_CALL }, | |
78 { "iicsmb", IICBUS_DRIVER_CLASS, "I2C to SMB bridge" }, 79 { "iic", IICBUS_DEVICE_CLASS, "PCF8574 I2C to 8 bits parallel i/o", 64}, | 78 { "iicsmb", IICBUS_DRIVER_CLASS, "I2C to SMB bridge" }, 79 { "iic", IICBUS_DEVICE_CLASS, "PCF8574 I2C to 8 bits parallel i/o", 64}, |
80 { "iic", IICBUS_DEVICE_CLASS, "PCF8584 as slave", I2C_MASTER_ADDRESS }, 81 { "ic", IICBUS_DEVICE_CLASS, "network interface", I2C_INET_ADDRESS }, | 80 { "iic", IICBUS_DEVICE_CLASS, "PCF8584 as slave", PCF_MASTER_ADDRESS }, 81 { "ic", IICBUS_DEVICE_CLASS, "network interface", PCF_MASTER_ADDRESS }, 82#if 0 83 { "iic", IICBUS_DRIVER_CLASS, "General Call", I2C_GENERAL_CALL }, 84#endif |
82 { NULL, 0 } 83}; 84 85static devclass_t iicbus_devclass; 86 87/* 88 * Device methods 89 */ 90static int iicbus_probe(device_t); 91static int iicbus_attach(device_t); 92static void iicbus_print_child(device_t, device_t); 93static int iicbus_read_ivar(device_t , device_t, int, u_long *); | 85 { NULL, 0 } 86}; 87 88static devclass_t iicbus_devclass; 89 90/* 91 * Device methods 92 */ 93static int iicbus_probe(device_t); 94static int iicbus_attach(device_t); 95static void iicbus_print_child(device_t, device_t); 96static int iicbus_read_ivar(device_t , device_t, int, u_long *); |
97static int iicbus_write_ivar(device_t , device_t, int, u_long); |
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94 95static device_method_t iicbus_methods[] = { 96 /* device interface */ 97 DEVMETHOD(device_probe, iicbus_probe), 98 DEVMETHOD(device_attach, iicbus_attach), 99 DEVMETHOD(device_detach, bus_generic_detach), 100 DEVMETHOD(device_shutdown, bus_generic_shutdown), 101 102 /* bus interface */ 103 DEVMETHOD(bus_print_child, iicbus_print_child), 104 DEVMETHOD(bus_read_ivar, iicbus_read_ivar), | 98 99static device_method_t iicbus_methods[] = { 100 /* device interface */ 101 DEVMETHOD(device_probe, iicbus_probe), 102 DEVMETHOD(device_attach, iicbus_attach), 103 DEVMETHOD(device_detach, bus_generic_detach), 104 DEVMETHOD(device_shutdown, bus_generic_shutdown), 105 106 /* bus interface */ 107 DEVMETHOD(bus_print_child, iicbus_print_child), 108 DEVMETHOD(bus_read_ivar, iicbus_read_ivar), |
105 DEVMETHOD(bus_write_ivar, bus_generic_write_ivar), | 109 DEVMETHOD(bus_write_ivar, iicbus_write_ivar), |
106 DEVMETHOD(bus_create_intr, bus_generic_create_intr), 107 DEVMETHOD(bus_connect_intr, bus_generic_connect_intr), 108 109 { 0, 0 } 110}; 111 112static driver_t iicbus_driver = { 113 "iicbus", 114 iicbus_methods, 115 DRIVER_TYPE_MISC, 116 sizeof(struct iicbus_softc), 117}; 118 | 110 DEVMETHOD(bus_create_intr, bus_generic_create_intr), 111 DEVMETHOD(bus_connect_intr, bus_generic_connect_intr), 112 113 { 0, 0 } 114}; 115 116static driver_t iicbus_driver = { 117 "iicbus", 118 iicbus_methods, 119 DRIVER_TYPE_MISC, 120 sizeof(struct iicbus_softc), 121}; 122 |
123static int 124iicbus_probe(device_t dev) 125{ 126 /* always present if probed */ 127 return (0); 128} 129 130#define MAXADDR 256 131static int iicdev_found[MAXADDR]; 132 133static int 134iic_probe_device(device_t dev, u_char addr) 135{ 136 int count; 137 char byte; 138 139 if ((addr & 1) == 0) { 140 /* is device writable? */ 141 if (!iicbus_start(dev, (u_char)addr, 0)) { 142 iicbus_stop(dev); 143 return (1); 144 } 145 } else { 146 /* is device readable? */ 147 if (!iicbus_block_read(dev, (u_char)addr, &byte, 1, &count)) 148 return (1); 149 } 150 151 return (0); 152} 153 |
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119/* | 154/* |
120 * At 'probe' time, we add all the devices which we know about to the 121 * bus. The generic attach routine will probe and attach them if they 122 * are alive. | 155 * We add all the devices which we know about. 156 * The generic attach routine will attach them if they are alive. |
123 */ 124static int | 157 */ 158static int |
125iicbus_probe(device_t dev) | 159iicbus_attach(device_t dev) |
126{ 127 struct iicbus_softc *sc = device_get_softc(dev); 128 struct iicbus_device *iicdev; 129 device_t child; | 160{ 161 struct iicbus_softc *sc = device_get_softc(dev); 162 struct iicbus_device *iicdev; 163 device_t child; |
164 int addr, count; 165 char byte; |
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130 | 166 |
131 /* XXX should query parent */ 132 sc->ownaddr = I2C_MASTER_ADDRESS; | 167 iicbus_reset(dev, IIC_FASTEST, 0, NULL); |
133 | 168 |
134 iicbus_reset(dev, IIC_FASTEST); | 169 printf("Probing for devices on iicbus%d:", device_get_unit(dev)); |
135 | 170 |
136 for (iicdev = iicbus_children; iicdev->iicd_name; iicdev++) { | 171 /* probe any devices */ 172 for (addr = FIRST_SLAVE_ADDR; addr < MAXADDR; addr++) { 173 if (iic_probe_device(dev, (u_char)addr)) { 174 printf(" <%x>", addr); 175 } 176 } 177 printf("\n"); |
137 | 178 |
179 /* attach known devices */ 180 for (iicdev = iicbus_children; iicdev->iicd_name; iicdev++) { |
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138 /* probe devices, not drivers */ 139 switch (iicdev->iicd_class) { 140 case IICBUS_DEVICE_CLASS: | 181 /* probe devices, not drivers */ 182 switch (iicdev->iicd_class) { 183 case IICBUS_DEVICE_CLASS: |
141 if (!iicbus_start(dev, iicdev->iicd_addr)) { 142 iicbus_stop(dev); | 184 if (iic_probe_device(dev, iicdev->iicd_addr)) |
143 iicdev->iicd_alive = 1; | 185 iicdev->iicd_alive = 1; |
144 } | |
145 break; | 186 break; |
187 |
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146 case IICBUS_DRIVER_CLASS: | 188 case IICBUS_DRIVER_CLASS: |
147 iicdev->iicd_addr = sc->ownaddr; | 189 iicdev->iicd_alive = 1; |
148 break; | 190 break; |
191 |
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149 default: 150 panic("%s: unknown class!", __FUNCTION__); 151 } 152 | 192 default: 193 panic("%s: unknown class!", __FUNCTION__); 194 } 195 |
153 child = device_add_child(dev, iicdev->iicd_name, -1, iicdev); 154 device_set_desc(child, iicdev->iicd_desc); | 196 if (iicdev->iicd_alive) { 197 child = device_add_child(dev, iicdev->iicd_name, 198 -1, iicdev); 199 device_set_desc(child, iicdev->iicd_desc); 200 } |
155 } | 201 } |
156 157 return (0); 158} 159 160static int 161iicbus_attach(device_t dev) 162{ | |
163 bus_generic_attach(dev); 164 165 return (0); 166} 167 168int 169iicbus_generic_intr(device_t dev, int event, char *buf) 170{ 171 return (0); 172} 173 | 202 bus_generic_attach(dev); 203 204 return (0); 205} 206 207int 208iicbus_generic_intr(device_t dev, int event, char *buf) 209{ 210 return (0); 211} 212 |
213int 214iicbus_null_callback(device_t dev, int index, caddr_t data) 215{ 216 return (0); 217} 218 219int 220iicbus_null_repeated_start(device_t dev, u_char addr) 221{ 222 return (IIC_ENOTSUPP); 223} 224 |
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174static void 175iicbus_print_child(device_t bus, device_t dev) 176{ 177 struct iicbus_device* iicdev = DEVTOIICBUS(dev); 178 179 switch (iicdev->iicd_class) { 180 case IICBUS_DEVICE_CLASS: | 225static void 226iicbus_print_child(device_t bus, device_t dev) 227{ 228 struct iicbus_device* iicdev = DEVTOIICBUS(dev); 229 230 switch (iicdev->iicd_class) { 231 case IICBUS_DEVICE_CLASS: |
181 printf(" on %s%d addr %d %s", device_get_name(bus), 182 device_get_unit(bus), iicdev->iicd_addr, 183 (iicdev->iicd_alive) ? "found" : "not found"); | 232 printf(" on %s%d addr 0x%x", device_get_name(bus), 233 device_get_unit(bus), iicdev->iicd_addr); |
184 break; 185 186 case IICBUS_DRIVER_CLASS: 187 printf(" on %s%d", device_get_name(bus), 188 device_get_unit(bus)); 189 break; 190 191 default: --- 15 unchanged lines hidden (view full) --- 207 208 default: 209 return (ENOENT); 210 } 211 212 return (0); 213} 214 | 234 break; 235 236 case IICBUS_DRIVER_CLASS: 237 printf(" on %s%d", device_get_name(bus), 238 device_get_unit(bus)); 239 break; 240 241 default: --- 15 unchanged lines hidden (view full) --- 257 258 default: 259 return (ENOENT); 260 } 261 262 return (0); 263} 264 |
265static int 266iicbus_write_ivar(device_t bus, device_t dev, int index, u_long val) 267{ 268 struct iicbus_device* iicdev = DEVTOIICBUS(dev); 269 270 switch (index) { 271 default: 272 return (ENOENT); 273 } 274 275 return (0); 276} 277 |
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215DRIVER_MODULE(iicbus, pcf, iicbus_driver, iicbus_devclass, 0, 0); | 278DRIVER_MODULE(iicbus, pcf, iicbus_driver, iicbus_devclass, 0, 0); |
279DRIVER_MODULE(iicbus, iicbb, iicbus_driver, iicbus_devclass, 0, 0); 280DRIVER_MODULE(iicbus, bti2c, iicbus_driver, iicbus_devclass, 0, 0); |
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