Thierry MERLE | f2242ee | 2006-12-04 08:31:14 -0300 | [diff] [blame] | 1 | /* |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 2 | * usbvision_i2c.c |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 3 | * i2c algorithm for USB-I2C Bridges |
| 4 | * |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 5 | * Copyright (c) 1999-2007 Joerg Heckenbach <joerg@heckenbach-aw.de> |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 6 | * Dwaine Garden <dwainegarden@rogers.com> |
| 7 | * |
| 8 | * This module is part of usbvision driver project. |
| 9 | * Updates to driver completed by Dwaine P. Garden |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or |
| 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 24 | */ |
| 25 | |
| 26 | |
| 27 | #include <linux/kernel.h> |
| 28 | #include <linux/module.h> |
| 29 | #include <linux/delay.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/version.h> |
Mauro Carvalho Chehab | a1ed551 | 2006-12-09 11:41:59 -0300 | [diff] [blame] | 32 | #include <linux/utsname.h> |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 33 | #include <linux/init.h> |
| 34 | #include <asm/uaccess.h> |
| 35 | #include <linux/ioport.h> |
| 36 | #include <linux/errno.h> |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 37 | #include <linux/usb.h> |
| 38 | #include <linux/i2c.h> |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 39 | #include "usbvision.h" |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 40 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 41 | #define DBG_I2C 1<<0 |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 42 | |
Douglas Schilling Landgraf | ff699e6 | 2008-04-22 14:41:48 -0300 | [diff] [blame] | 43 | static int i2c_debug; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 44 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 45 | module_param (i2c_debug, int, 0644); // debug_i2c_usb mode of the device driver |
| 46 | MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]"); |
| 47 | |
Thierry MERLE | df18c31 | 2008-04-04 21:00:57 -0300 | [diff] [blame] | 48 | #define PDEBUG(level, fmt, args...) { \ |
| 49 | if (i2c_debug & (level)) \ |
Greg Kroah-Hartman | a482f32 | 2008-10-10 05:08:23 -0300 | [diff] [blame] | 50 | printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \ |
| 51 | __func__, __LINE__ , ## args); \ |
Thierry MERLE | df18c31 | 2008-04-04 21:00:57 -0300 | [diff] [blame] | 52 | } |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 53 | |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 54 | static int usbvision_i2c_write(struct usb_usbvision *usbvision, unsigned char addr, char *buf, |
Mauro Carvalho Chehab | 2a7e9a2 | 2006-12-11 05:37:14 -0300 | [diff] [blame] | 55 | short len); |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 56 | static int usbvision_i2c_read(struct usb_usbvision *usbvision, unsigned char addr, char *buf, |
Mauro Carvalho Chehab | 2a7e9a2 | 2006-12-11 05:37:14 -0300 | [diff] [blame] | 57 | short len); |
| 58 | |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 59 | static inline int try_write_address(struct i2c_adapter *i2c_adap, |
| 60 | unsigned char addr, int retries) |
| 61 | { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 62 | struct usb_usbvision *usbvision; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 63 | int i, ret = -1; |
| 64 | char buf[4]; |
| 65 | |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 66 | usbvision = (struct usb_usbvision *)i2c_get_adapdata(i2c_adap); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 67 | buf[0] = 0x00; |
| 68 | for (i = 0; i <= retries; i++) { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 69 | ret = (usbvision_i2c_write(usbvision, addr, buf, 1)); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 70 | if (ret == 1) |
| 71 | break; /* success! */ |
Mauro Carvalho Chehab | c626846 | 2006-12-11 17:18:15 -0300 | [diff] [blame] | 72 | udelay(5); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 73 | if (i == retries) /* no success */ |
| 74 | break; |
Mauro Carvalho Chehab | c626846 | 2006-12-11 17:18:15 -0300 | [diff] [blame] | 75 | udelay(10); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 76 | } |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 77 | if (i) { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 78 | PDEBUG(DBG_I2C,"Needed %d retries for address %#2x", i, addr); |
| 79 | PDEBUG(DBG_I2C,"Maybe there's no device at this address"); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 80 | } |
| 81 | return ret; |
| 82 | } |
| 83 | |
| 84 | static inline int try_read_address(struct i2c_adapter *i2c_adap, |
| 85 | unsigned char addr, int retries) |
| 86 | { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 87 | struct usb_usbvision *usbvision; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 88 | int i, ret = -1; |
| 89 | char buf[4]; |
| 90 | |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 91 | usbvision = (struct usb_usbvision *)i2c_get_adapdata(i2c_adap); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 92 | for (i = 0; i <= retries; i++) { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 93 | ret = (usbvision_i2c_read(usbvision, addr, buf, 1)); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 94 | if (ret == 1) |
| 95 | break; /* success! */ |
Mauro Carvalho Chehab | c626846 | 2006-12-11 17:18:15 -0300 | [diff] [blame] | 96 | udelay(5); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 97 | if (i == retries) /* no success */ |
| 98 | break; |
Mauro Carvalho Chehab | c626846 | 2006-12-11 17:18:15 -0300 | [diff] [blame] | 99 | udelay(10); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 100 | } |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 101 | if (i) { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 102 | PDEBUG(DBG_I2C,"Needed %d retries for address %#2x", i, addr); |
| 103 | PDEBUG(DBG_I2C,"Maybe there's no device at this address"); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 104 | } |
| 105 | return ret; |
| 106 | } |
| 107 | |
| 108 | static inline int usb_find_address(struct i2c_adapter *i2c_adap, |
| 109 | struct i2c_msg *msg, int retries, |
| 110 | unsigned char *add) |
| 111 | { |
| 112 | unsigned short flags = msg->flags; |
Thierry MERLE | f2242ee | 2006-12-04 08:31:14 -0300 | [diff] [blame] | 113 | |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 114 | unsigned char addr; |
| 115 | int ret; |
| 116 | if ((flags & I2C_M_TEN)) { |
| 117 | /* a ten bit address */ |
| 118 | addr = 0xf0 | ((msg->addr >> 7) & 0x03); |
| 119 | /* try extended address code... */ |
| 120 | ret = try_write_address(i2c_adap, addr, retries); |
| 121 | if (ret != 1) { |
| 122 | err("died at extended address code, while writing"); |
| 123 | return -EREMOTEIO; |
| 124 | } |
| 125 | add[0] = addr; |
| 126 | if (flags & I2C_M_RD) { |
| 127 | /* okay, now switch into reading mode */ |
| 128 | addr |= 0x01; |
| 129 | ret = try_read_address(i2c_adap, addr, retries); |
| 130 | if (ret != 1) { |
| 131 | err("died at extended address code, while reading"); |
| 132 | return -EREMOTEIO; |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | } else { /* normal 7bit address */ |
| 137 | addr = (msg->addr << 1); |
| 138 | if (flags & I2C_M_RD) |
| 139 | addr |= 1; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 140 | |
| 141 | add[0] = addr; |
| 142 | if (flags & I2C_M_RD) |
| 143 | ret = try_read_address(i2c_adap, addr, retries); |
| 144 | else |
| 145 | ret = try_write_address(i2c_adap, addr, retries); |
| 146 | |
| 147 | if (ret != 1) { |
| 148 | return -EREMOTEIO; |
| 149 | } |
| 150 | } |
| 151 | return 0; |
| 152 | } |
| 153 | |
| 154 | static int |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 155 | usbvision_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num) |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 156 | { |
| 157 | struct i2c_msg *pmsg; |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 158 | struct usb_usbvision *usbvision; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 159 | int i, ret; |
Hans Verkuil | cf8e193 | 2009-01-17 13:09:11 -0300 | [diff] [blame] | 160 | unsigned char addr = 0; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 161 | |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 162 | usbvision = (struct usb_usbvision *)i2c_get_adapdata(i2c_adap); |
| 163 | |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 164 | for (i = 0; i < num; i++) { |
| 165 | pmsg = &msgs[i]; |
| 166 | ret = usb_find_address(i2c_adap, pmsg, i2c_adap->retries, &addr); |
| 167 | if (ret != 0) { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 168 | PDEBUG(DBG_I2C,"got NAK from device, message #%d", i); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 169 | return (ret < 0) ? ret : -EREMOTEIO; |
| 170 | } |
| 171 | |
| 172 | if (pmsg->flags & I2C_M_RD) { |
| 173 | /* read bytes into buffer */ |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 174 | ret = (usbvision_i2c_read(usbvision, addr, pmsg->buf, pmsg->len)); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 175 | if (ret < pmsg->len) { |
| 176 | return (ret < 0) ? ret : -EREMOTEIO; |
| 177 | } |
| 178 | } else { |
| 179 | /* write bytes from buffer */ |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 180 | ret = (usbvision_i2c_write(usbvision, addr, pmsg->buf, pmsg->len)); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 181 | if (ret < pmsg->len) { |
| 182 | return (ret < 0) ? ret : -EREMOTEIO; |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | return num; |
| 187 | } |
| 188 | |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 189 | static u32 functionality(struct i2c_adapter *adap) |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 190 | { |
Jean Delvare | 39f46ad | 2007-09-09 06:17:44 -0300 | [diff] [blame] | 191 | return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 192 | } |
| 193 | |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 194 | /* -----exported algorithm data: ------------------------------------- */ |
| 195 | |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 196 | static struct i2c_algorithm usbvision_algo = { |
| 197 | .master_xfer = usbvision_i2c_xfer, |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 198 | .smbus_xfer = NULL, |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 199 | .functionality = functionality, |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 200 | }; |
| 201 | |
| 202 | |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 203 | /* |
| 204 | * registering functions to load algorithms at runtime |
| 205 | */ |
| 206 | static int usbvision_i2c_usb_add_bus(struct i2c_adapter *adap) |
| 207 | { |
| 208 | PDEBUG(DBG_I2C, "I2C debugging is enabled [i2c]"); |
| 209 | PDEBUG(DBG_I2C, "ALGO debugging is enabled [i2c]"); |
| 210 | |
| 211 | /* register new adapter to i2c module... */ |
| 212 | |
| 213 | adap->algo = &usbvision_algo; |
| 214 | |
| 215 | adap->timeout = 100; /* default values, should */ |
| 216 | adap->retries = 3; /* be replaced by defines */ |
| 217 | |
| 218 | i2c_add_adapter(adap); |
| 219 | |
| 220 | PDEBUG(DBG_I2C,"i2c bus for %s registered", adap->name); |
| 221 | |
| 222 | return 0; |
| 223 | } |
| 224 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 225 | /* ----------------------------------------------------------------------- */ |
| 226 | /* usbvision specific I2C functions */ |
| 227 | /* ----------------------------------------------------------------------- */ |
| 228 | static struct i2c_adapter i2c_adap_template; |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 229 | static struct i2c_client i2c_client_template; |
| 230 | |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 231 | int usbvision_i2c_register(struct usb_usbvision *usbvision) |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 232 | { |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 233 | memcpy(&usbvision->i2c_adap, &i2c_adap_template, |
| 234 | sizeof(struct i2c_adapter)); |
| 235 | memcpy(&usbvision->i2c_client, &i2c_client_template, |
| 236 | sizeof(struct i2c_client)); |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 237 | |
| 238 | sprintf(usbvision->i2c_adap.name + strlen(usbvision->i2c_adap.name), |
Hans Verkuil | c6330fb | 2008-10-19 18:54:26 -0300 | [diff] [blame] | 239 | " #%d", usbvision->vdev->num); |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 240 | PDEBUG(DBG_I2C,"Adaptername: %s", usbvision->i2c_adap.name); |
| 241 | usbvision->i2c_adap.dev.parent = &usbvision->dev->dev; |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 242 | |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 243 | i2c_set_adapdata(&usbvision->i2c_adap, usbvision); |
| 244 | i2c_set_clientdata(&usbvision->i2c_client, usbvision); |
| 245 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 246 | usbvision->i2c_client.adapter = &usbvision->i2c_adap; |
| 247 | |
| 248 | if (usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_IIC_LRNACK) < 0) { |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 249 | printk(KERN_ERR "usbvision_register: can't write reg\n"); |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 250 | return -EBUSY; |
| 251 | } |
| 252 | |
| 253 | #ifdef CONFIG_MODULES |
| 254 | /* Request the load of the i2c modules we need */ |
| 255 | switch (usbvision_device_data[usbvision->DevModel].Codec) { |
| 256 | case CODEC_SAA7113: |
| 257 | request_module("saa7115"); |
| 258 | break; |
| 259 | case CODEC_SAA7111: |
| 260 | request_module("saa7115"); |
| 261 | break; |
| 262 | } |
| 263 | if (usbvision_device_data[usbvision->DevModel].Tuner == 1) { |
| 264 | request_module("tuner"); |
| 265 | } |
| 266 | #endif |
| 267 | |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 268 | return usbvision_i2c_usb_add_bus(&usbvision->i2c_adap); |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | int usbvision_i2c_unregister(struct usb_usbvision *usbvision) |
| 272 | { |
| 273 | |
| 274 | i2c_del_adapter(&(usbvision->i2c_adap)); |
| 275 | |
| 276 | PDEBUG(DBG_I2C,"i2c bus for %s unregistered", usbvision->i2c_adap.name); |
| 277 | |
| 278 | return 0; |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | void call_i2c_clients(struct usb_usbvision *usbvision, unsigned int cmd, |
| 282 | void *arg) |
| 283 | { |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 284 | i2c_clients_command(&usbvision->i2c_adap, cmd, arg); |
| 285 | } |
| 286 | |
| 287 | static int attach_inform(struct i2c_client *client) |
| 288 | { |
| 289 | struct usb_usbvision *usbvision; |
| 290 | |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 291 | usbvision = (struct usb_usbvision *)i2c_get_adapdata(client->adapter); |
| 292 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 293 | switch (client->addr << 1) { |
Trent Piepho | 3153bd9 | 2007-04-15 10:09:56 -0300 | [diff] [blame] | 294 | case 0x42 << 1: |
| 295 | case 0x43 << 1: |
| 296 | case 0x4a << 1: |
| 297 | case 0x4b << 1: |
Thierry MERLE | 6284fea | 2007-04-16 17:47:08 -0300 | [diff] [blame] | 298 | PDEBUG(DBG_I2C,"attach_inform: tda9887 detected."); |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 299 | break; |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 300 | case 0x42: |
| 301 | PDEBUG(DBG_I2C,"attach_inform: saa7114 detected."); |
| 302 | break; |
| 303 | case 0x4a: |
| 304 | PDEBUG(DBG_I2C,"attach_inform: saa7113 detected."); |
| 305 | break; |
Thierry MERLE | 38284ba | 2006-12-15 16:46:53 -0300 | [diff] [blame] | 306 | case 0x48: |
| 307 | PDEBUG(DBG_I2C,"attach_inform: saa7111 detected."); |
| 308 | break; |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 309 | case 0xa0: |
| 310 | PDEBUG(DBG_I2C,"attach_inform: eeprom detected."); |
| 311 | break; |
| 312 | |
| 313 | default: |
| 314 | { |
| 315 | struct tuner_setup tun_setup; |
| 316 | |
| 317 | PDEBUG(DBG_I2C,"attach inform: detected I2C address %x", client->addr << 1); |
| 318 | usbvision->tuner_addr = client->addr; |
| 319 | |
| 320 | if ((usbvision->have_tuner) && (usbvision->tuner_type != -1)) { |
| 321 | tun_setup.mode_mask = T_ANALOG_TV | T_RADIO; |
| 322 | tun_setup.type = usbvision->tuner_type; |
| 323 | tun_setup.addr = usbvision->tuner_addr; |
| 324 | call_i2c_clients(usbvision, TUNER_SET_TYPE_ADDR, &tun_setup); |
| 325 | } |
| 326 | } |
| 327 | break; |
| 328 | } |
| 329 | return 0; |
| 330 | } |
| 331 | |
| 332 | static int detach_inform(struct i2c_client *client) |
| 333 | { |
| 334 | struct usb_usbvision *usbvision; |
| 335 | |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 336 | usbvision = (struct usb_usbvision *)i2c_get_adapdata(client->adapter); |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 337 | |
Mauro Carvalho Chehab | a1ed551 | 2006-12-09 11:41:59 -0300 | [diff] [blame] | 338 | PDEBUG(DBG_I2C,"usbvision[%d] detaches %s", usbvision->nr, client->name); |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 339 | return 0; |
| 340 | } |
| 341 | |
| 342 | static int |
| 343 | usbvision_i2c_read_max4(struct usb_usbvision *usbvision, unsigned char addr, |
| 344 | char *buf, short len) |
| 345 | { |
| 346 | int rc, retries; |
| 347 | |
| 348 | for (retries = 5;;) { |
| 349 | rc = usbvision_write_reg(usbvision, USBVISION_SER_ADRS, addr); |
| 350 | if (rc < 0) |
| 351 | return rc; |
| 352 | |
| 353 | /* Initiate byte read cycle */ |
| 354 | /* USBVISION_SER_CONT <- d0-d2 n. of bytes to r/w */ |
| 355 | /* d3 0=Wr 1=Rd */ |
| 356 | rc = usbvision_write_reg(usbvision, USBVISION_SER_CONT, |
| 357 | (len & 0x07) | 0x18); |
| 358 | if (rc < 0) |
| 359 | return rc; |
| 360 | |
| 361 | /* Test for Busy and ACK */ |
| 362 | do { |
| 363 | /* USBVISION_SER_CONT -> d4 == 0 busy */ |
| 364 | rc = usbvision_read_reg(usbvision, USBVISION_SER_CONT); |
| 365 | } while (rc > 0 && ((rc & 0x10) != 0)); /* Retry while busy */ |
| 366 | if (rc < 0) |
| 367 | return rc; |
| 368 | |
| 369 | /* USBVISION_SER_CONT -> d5 == 1 Not ack */ |
| 370 | if ((rc & 0x20) == 0) /* Ack? */ |
| 371 | break; |
| 372 | |
| 373 | /* I2C abort */ |
| 374 | rc = usbvision_write_reg(usbvision, USBVISION_SER_CONT, 0x00); |
| 375 | if (rc < 0) |
| 376 | return rc; |
| 377 | |
| 378 | if (--retries < 0) |
| 379 | return -1; |
| 380 | } |
| 381 | |
| 382 | switch (len) { |
| 383 | case 4: |
| 384 | buf[3] = usbvision_read_reg(usbvision, USBVISION_SER_DAT4); |
| 385 | case 3: |
| 386 | buf[2] = usbvision_read_reg(usbvision, USBVISION_SER_DAT3); |
| 387 | case 2: |
| 388 | buf[1] = usbvision_read_reg(usbvision, USBVISION_SER_DAT2); |
| 389 | case 1: |
| 390 | buf[0] = usbvision_read_reg(usbvision, USBVISION_SER_DAT1); |
| 391 | break; |
| 392 | default: |
| 393 | printk(KERN_ERR |
| 394 | "usbvision_i2c_read_max4: buffer length > 4\n"); |
| 395 | } |
| 396 | |
| 397 | if (i2c_debug & DBG_I2C) { |
| 398 | int idx; |
| 399 | for (idx = 0; idx < len; idx++) { |
| 400 | PDEBUG(DBG_I2C,"read %x from address %x", (unsigned char)buf[idx], addr); |
| 401 | } |
| 402 | } |
| 403 | return len; |
| 404 | } |
| 405 | |
| 406 | |
| 407 | static int usbvision_i2c_write_max4(struct usb_usbvision *usbvision, |
| 408 | unsigned char addr, const char *buf, |
| 409 | short len) |
| 410 | { |
| 411 | int rc, retries; |
| 412 | int i; |
| 413 | unsigned char value[6]; |
| 414 | unsigned char ser_cont; |
| 415 | |
| 416 | ser_cont = (len & 0x07) | 0x10; |
| 417 | |
| 418 | value[0] = addr; |
| 419 | value[1] = ser_cont; |
| 420 | for (i = 0; i < len; i++) |
| 421 | value[i + 2] = buf[i]; |
| 422 | |
| 423 | for (retries = 5;;) { |
| 424 | rc = usb_control_msg(usbvision->dev, |
| 425 | usb_sndctrlpipe(usbvision->dev, 1), |
| 426 | USBVISION_OP_CODE, |
| 427 | USB_DIR_OUT | USB_TYPE_VENDOR | |
| 428 | USB_RECIP_ENDPOINT, 0, |
| 429 | (__u16) USBVISION_SER_ADRS, value, |
| 430 | len + 2, HZ); |
| 431 | |
| 432 | if (rc < 0) |
| 433 | return rc; |
| 434 | |
| 435 | rc = usbvision_write_reg(usbvision, USBVISION_SER_CONT, |
| 436 | (len & 0x07) | 0x10); |
| 437 | if (rc < 0) |
| 438 | return rc; |
| 439 | |
| 440 | /* Test for Busy and ACK */ |
| 441 | do { |
| 442 | rc = usbvision_read_reg(usbvision, USBVISION_SER_CONT); |
| 443 | } while (rc > 0 && ((rc & 0x10) != 0)); /* Retry while busy */ |
| 444 | if (rc < 0) |
| 445 | return rc; |
| 446 | |
| 447 | if ((rc & 0x20) == 0) /* Ack? */ |
| 448 | break; |
| 449 | |
| 450 | /* I2C abort */ |
| 451 | usbvision_write_reg(usbvision, USBVISION_SER_CONT, 0x00); |
| 452 | |
| 453 | if (--retries < 0) |
| 454 | return -1; |
| 455 | |
| 456 | } |
| 457 | |
| 458 | if (i2c_debug & DBG_I2C) { |
| 459 | int idx; |
| 460 | for (idx = 0; idx < len; idx++) { |
| 461 | PDEBUG(DBG_I2C,"wrote %x at address %x", (unsigned char)buf[idx], addr); |
| 462 | } |
| 463 | } |
| 464 | return len; |
| 465 | } |
| 466 | |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 467 | static int usbvision_i2c_write(struct usb_usbvision *usbvision, unsigned char addr, char *buf, |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 468 | short len) |
| 469 | { |
| 470 | char *bufPtr = buf; |
| 471 | int retval; |
| 472 | int wrcount = 0; |
| 473 | int count; |
| 474 | int maxLen = 4; |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 475 | |
| 476 | while (len > 0) { |
| 477 | count = (len > maxLen) ? maxLen : len; |
| 478 | retval = usbvision_i2c_write_max4(usbvision, addr, bufPtr, count); |
| 479 | if (retval > 0) { |
| 480 | len -= count; |
| 481 | bufPtr += count; |
| 482 | wrcount += count; |
| 483 | } else |
| 484 | return (retval < 0) ? retval : -EFAULT; |
| 485 | } |
| 486 | return wrcount; |
| 487 | } |
| 488 | |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 489 | static int usbvision_i2c_read(struct usb_usbvision *usbvision, unsigned char addr, char *buf, |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 490 | short len) |
| 491 | { |
| 492 | char temp[4]; |
| 493 | int retval, i; |
| 494 | int rdcount = 0; |
| 495 | int count; |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 496 | |
| 497 | while (len > 0) { |
| 498 | count = (len > 3) ? 4 : len; |
| 499 | retval = usbvision_i2c_read_max4(usbvision, addr, temp, count); |
| 500 | if (retval > 0) { |
| 501 | for (i = 0; i < len; i++) |
| 502 | buf[rdcount + i] = temp[i]; |
| 503 | len -= count; |
| 504 | rdcount += count; |
| 505 | } else |
| 506 | return (retval < 0) ? retval : -EFAULT; |
| 507 | } |
| 508 | return rdcount; |
| 509 | } |
| 510 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 511 | static struct i2c_adapter i2c_adap_template = { |
| 512 | .owner = THIS_MODULE, |
| 513 | .name = "usbvision", |
| 514 | .id = I2C_HW_B_BT848, /* FIXME */ |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 515 | .client_register = attach_inform, |
| 516 | .client_unregister = detach_inform, |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 517 | .class = I2C_CLASS_TV_ANALOG, |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 518 | }; |
| 519 | |
| 520 | static struct i2c_client i2c_client_template = { |
| 521 | .name = "usbvision internal", |
| 522 | }; |
| 523 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 524 | /* |
| 525 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 526 | * --------------------------------------------------------------------------- |
| 527 | * Local variables: |
| 528 | * c-basic-offset: 8 |
| 529 | * End: |
| 530 | */ |