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> |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 30 | #include <linux/init.h> |
| 31 | #include <asm/uaccess.h> |
| 32 | #include <linux/ioport.h> |
| 33 | #include <linux/errno.h> |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 34 | #include <linux/usb.h> |
| 35 | #include <linux/i2c.h> |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 36 | #include "usbvision.h" |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 37 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 38 | #define DBG_I2C 1<<0 |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 39 | |
Douglas Schilling Landgraf | ff699e6 | 2008-04-22 14:41:48 -0300 | [diff] [blame] | 40 | static int i2c_debug; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 41 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 42 | module_param (i2c_debug, int, 0644); // debug_i2c_usb mode of the device driver |
| 43 | MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]"); |
| 44 | |
Thierry MERLE | df18c31 | 2008-04-04 21:00:57 -0300 | [diff] [blame] | 45 | #define PDEBUG(level, fmt, args...) { \ |
| 46 | if (i2c_debug & (level)) \ |
Greg Kroah-Hartman | a482f32 | 2008-10-10 05:08:23 -0300 | [diff] [blame] | 47 | printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \ |
| 48 | __func__, __LINE__ , ## args); \ |
Thierry MERLE | df18c31 | 2008-04-04 21:00:57 -0300 | [diff] [blame] | 49 | } |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 50 | |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 51 | 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] | 52 | short len); |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 53 | 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] | 54 | short len); |
| 55 | |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 56 | static inline int try_write_address(struct i2c_adapter *i2c_adap, |
| 57 | unsigned char addr, int retries) |
| 58 | { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 59 | struct usb_usbvision *usbvision; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 60 | int i, ret = -1; |
| 61 | char buf[4]; |
| 62 | |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 63 | usbvision = (struct usb_usbvision *)i2c_get_adapdata(i2c_adap); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 64 | buf[0] = 0x00; |
| 65 | for (i = 0; i <= retries; i++) { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 66 | ret = (usbvision_i2c_write(usbvision, addr, buf, 1)); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 67 | if (ret == 1) |
| 68 | break; /* success! */ |
Mauro Carvalho Chehab | c626846 | 2006-12-11 17:18:15 -0300 | [diff] [blame] | 69 | udelay(5); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 70 | if (i == retries) /* no success */ |
| 71 | break; |
Mauro Carvalho Chehab | c626846 | 2006-12-11 17:18:15 -0300 | [diff] [blame] | 72 | udelay(10); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 73 | } |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 74 | if (i) { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 75 | PDEBUG(DBG_I2C,"Needed %d retries for address %#2x", i, addr); |
| 76 | PDEBUG(DBG_I2C,"Maybe there's no device at this address"); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 77 | } |
| 78 | return ret; |
| 79 | } |
| 80 | |
| 81 | static inline int try_read_address(struct i2c_adapter *i2c_adap, |
| 82 | unsigned char addr, int retries) |
| 83 | { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 84 | struct usb_usbvision *usbvision; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 85 | int i, ret = -1; |
| 86 | char buf[4]; |
| 87 | |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 88 | usbvision = (struct usb_usbvision *)i2c_get_adapdata(i2c_adap); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 89 | for (i = 0; i <= retries; i++) { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 90 | ret = (usbvision_i2c_read(usbvision, addr, buf, 1)); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 91 | if (ret == 1) |
| 92 | break; /* success! */ |
Mauro Carvalho Chehab | c626846 | 2006-12-11 17:18:15 -0300 | [diff] [blame] | 93 | udelay(5); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 94 | if (i == retries) /* no success */ |
| 95 | break; |
Mauro Carvalho Chehab | c626846 | 2006-12-11 17:18:15 -0300 | [diff] [blame] | 96 | udelay(10); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 97 | } |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 98 | if (i) { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 99 | PDEBUG(DBG_I2C,"Needed %d retries for address %#2x", i, addr); |
| 100 | PDEBUG(DBG_I2C,"Maybe there's no device at this address"); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 101 | } |
| 102 | return ret; |
| 103 | } |
| 104 | |
| 105 | static inline int usb_find_address(struct i2c_adapter *i2c_adap, |
| 106 | struct i2c_msg *msg, int retries, |
| 107 | unsigned char *add) |
| 108 | { |
| 109 | unsigned short flags = msg->flags; |
Thierry MERLE | f2242ee | 2006-12-04 08:31:14 -0300 | [diff] [blame] | 110 | |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 111 | unsigned char addr; |
| 112 | int ret; |
| 113 | if ((flags & I2C_M_TEN)) { |
| 114 | /* a ten bit address */ |
| 115 | addr = 0xf0 | ((msg->addr >> 7) & 0x03); |
| 116 | /* try extended address code... */ |
| 117 | ret = try_write_address(i2c_adap, addr, retries); |
| 118 | if (ret != 1) { |
Mauro Carvalho Chehab | be9ed51 | 2009-01-08 09:13:42 -0300 | [diff] [blame] | 119 | dev_err(&i2c_adap->dev, |
| 120 | "died at extended address code, while writing\n"); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 121 | return -EREMOTEIO; |
| 122 | } |
| 123 | add[0] = addr; |
| 124 | if (flags & I2C_M_RD) { |
| 125 | /* okay, now switch into reading mode */ |
| 126 | addr |= 0x01; |
| 127 | ret = try_read_address(i2c_adap, addr, retries); |
| 128 | if (ret != 1) { |
Mauro Carvalho Chehab | be9ed51 | 2009-01-08 09:13:42 -0300 | [diff] [blame] | 129 | dev_err(&i2c_adap->dev, |
| 130 | "died at extended address code, while reading\n"); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 131 | return -EREMOTEIO; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | } else { /* normal 7bit address */ |
| 136 | addr = (msg->addr << 1); |
| 137 | if (flags & I2C_M_RD) |
| 138 | addr |= 1; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 139 | |
| 140 | add[0] = addr; |
| 141 | if (flags & I2C_M_RD) |
| 142 | ret = try_read_address(i2c_adap, addr, retries); |
| 143 | else |
| 144 | ret = try_write_address(i2c_adap, addr, retries); |
| 145 | |
| 146 | if (ret != 1) { |
| 147 | return -EREMOTEIO; |
| 148 | } |
| 149 | } |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | static int |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 154 | 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] | 155 | { |
| 156 | struct i2c_msg *pmsg; |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 157 | struct usb_usbvision *usbvision; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 158 | int i, ret; |
Hans Verkuil | cf8e193 | 2009-01-17 13:09:11 -0300 | [diff] [blame] | 159 | unsigned char addr = 0; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 160 | |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 161 | usbvision = (struct usb_usbvision *)i2c_get_adapdata(i2c_adap); |
| 162 | |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 163 | for (i = 0; i < num; i++) { |
| 164 | pmsg = &msgs[i]; |
| 165 | ret = usb_find_address(i2c_adap, pmsg, i2c_adap->retries, &addr); |
| 166 | if (ret != 0) { |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 167 | PDEBUG(DBG_I2C,"got NAK from device, message #%d", i); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 168 | return (ret < 0) ? ret : -EREMOTEIO; |
| 169 | } |
| 170 | |
| 171 | if (pmsg->flags & I2C_M_RD) { |
| 172 | /* read bytes into buffer */ |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 173 | ret = (usbvision_i2c_read(usbvision, addr, pmsg->buf, pmsg->len)); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 174 | if (ret < pmsg->len) { |
| 175 | return (ret < 0) ? ret : -EREMOTEIO; |
| 176 | } |
| 177 | } else { |
| 178 | /* write bytes from buffer */ |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 179 | ret = (usbvision_i2c_write(usbvision, addr, pmsg->buf, pmsg->len)); |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 180 | if (ret < pmsg->len) { |
| 181 | return (ret < 0) ? ret : -EREMOTEIO; |
| 182 | } |
| 183 | } |
| 184 | } |
| 185 | return num; |
| 186 | } |
| 187 | |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 188 | static u32 functionality(struct i2c_adapter *adap) |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 189 | { |
Jean Delvare | 39f46ad | 2007-09-09 06:17:44 -0300 | [diff] [blame] | 190 | return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_10BIT_ADDR; |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 191 | } |
| 192 | |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 193 | /* -----exported algorithm data: ------------------------------------- */ |
| 194 | |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 195 | static struct i2c_algorithm usbvision_algo = { |
| 196 | .master_xfer = usbvision_i2c_xfer, |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 197 | .smbus_xfer = NULL, |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 198 | .functionality = functionality, |
Mauro Carvalho Chehab | 781aa1d | 2006-12-04 08:30:53 -0300 | [diff] [blame] | 199 | }; |
| 200 | |
| 201 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 202 | /* ----------------------------------------------------------------------- */ |
| 203 | /* usbvision specific I2C functions */ |
| 204 | /* ----------------------------------------------------------------------- */ |
| 205 | static struct i2c_adapter i2c_adap_template; |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 206 | |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 207 | int usbvision_i2c_register(struct usb_usbvision *usbvision) |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 208 | { |
Hans Verkuil | 1df7953 | 2009-02-21 18:11:31 -0300 | [diff] [blame] | 209 | static unsigned short saa711x_addrs[] = { |
| 210 | 0x4a >> 1, 0x48 >> 1, /* SAA7111, SAA7111A and SAA7113 */ |
| 211 | 0x42 >> 1, 0x40 >> 1, /* SAA7114, SAA7115 and SAA7118 */ |
| 212 | I2C_CLIENT_END }; |
| 213 | |
Hans Verkuil | 8403472 | 2010-09-17 15:07:28 -0300 | [diff] [blame] | 214 | if (usbvision->registered_i2c) |
| 215 | return 0; |
| 216 | |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 217 | memcpy(&usbvision->i2c_adap, &i2c_adap_template, |
| 218 | sizeof(struct i2c_adapter)); |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 219 | |
Laurent Pinchart | 0fda5d4 | 2009-11-27 13:57:18 -0300 | [diff] [blame] | 220 | sprintf(usbvision->i2c_adap.name, "%s-%d-%s", i2c_adap_template.name, |
| 221 | usbvision->dev->bus->busnum, usbvision->dev->devpath); |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 222 | PDEBUG(DBG_I2C,"Adaptername: %s", usbvision->i2c_adap.name); |
| 223 | usbvision->i2c_adap.dev.parent = &usbvision->dev->dev; |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 224 | |
Hans Verkuil | 1df7953 | 2009-02-21 18:11:31 -0300 | [diff] [blame] | 225 | i2c_set_adapdata(&usbvision->i2c_adap, &usbvision->v4l2_dev); |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 226 | |
| 227 | if (usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_IIC_LRNACK) < 0) { |
Thierry MERLE | bf8b20e | 2007-04-16 18:00:49 -0300 | [diff] [blame] | 228 | printk(KERN_ERR "usbvision_register: can't write reg\n"); |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 229 | return -EBUSY; |
| 230 | } |
| 231 | |
Hans Verkuil | 1df7953 | 2009-02-21 18:11:31 -0300 | [diff] [blame] | 232 | PDEBUG(DBG_I2C, "I2C debugging is enabled [i2c]"); |
| 233 | PDEBUG(DBG_I2C, "ALGO debugging is enabled [i2c]"); |
| 234 | |
| 235 | /* register new adapter to i2c module... */ |
| 236 | |
| 237 | usbvision->i2c_adap.algo = &usbvision_algo; |
| 238 | |
| 239 | usbvision->i2c_adap.timeout = 100; /* default values, should */ |
| 240 | usbvision->i2c_adap.retries = 3; /* be replaced by defines */ |
| 241 | |
| 242 | i2c_add_adapter(&usbvision->i2c_adap); |
| 243 | |
| 244 | PDEBUG(DBG_I2C, "i2c bus for %s registered", usbvision->i2c_adap.name); |
| 245 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 246 | /* Request the load of the i2c modules we need */ |
| 247 | switch (usbvision_device_data[usbvision->DevModel].Codec) { |
| 248 | case CODEC_SAA7113: |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 249 | case CODEC_SAA7111: |
Hans Verkuil | 4d6c871 | 2010-05-02 09:29:27 -0300 | [diff] [blame] | 250 | /* Without this delay the detection of the saa711x is |
| 251 | hit-and-miss. */ |
| 252 | mdelay(10); |
Hans Verkuil | 53dacb1 | 2009-08-10 02:49:08 -0300 | [diff] [blame] | 253 | v4l2_i2c_new_subdev(&usbvision->v4l2_dev, |
Laurent Pinchart | 9a1f8b3 | 2010-09-24 10:16:44 -0300 | [diff] [blame] | 254 | &usbvision->i2c_adap, |
Hans Verkuil | 53dacb1 | 2009-08-10 02:49:08 -0300 | [diff] [blame] | 255 | "saa7115_auto", 0, saa711x_addrs); |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 256 | break; |
| 257 | } |
| 258 | if (usbvision_device_data[usbvision->DevModel].Tuner == 1) { |
Hans Verkuil | 1df7953 | 2009-02-21 18:11:31 -0300 | [diff] [blame] | 259 | struct v4l2_subdev *sd; |
| 260 | enum v4l2_i2c_tuner_type type; |
| 261 | struct tuner_setup tun_setup; |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 262 | |
Hans Verkuil | 53dacb1 | 2009-08-10 02:49:08 -0300 | [diff] [blame] | 263 | sd = v4l2_i2c_new_subdev(&usbvision->v4l2_dev, |
Laurent Pinchart | 9a1f8b3 | 2010-09-24 10:16:44 -0300 | [diff] [blame] | 264 | &usbvision->i2c_adap, |
Hans Verkuil | 53dacb1 | 2009-08-10 02:49:08 -0300 | [diff] [blame] | 265 | "tuner", 0, v4l2_i2c_tuner_addrs(ADDRS_DEMOD)); |
Hans Verkuil | 1df7953 | 2009-02-21 18:11:31 -0300 | [diff] [blame] | 266 | /* depending on whether we found a demod or not, select |
| 267 | the tuner type. */ |
| 268 | type = sd ? ADDRS_TV_WITH_DEMOD : ADDRS_TV; |
| 269 | |
Hans Verkuil | 53dacb1 | 2009-08-10 02:49:08 -0300 | [diff] [blame] | 270 | sd = v4l2_i2c_new_subdev(&usbvision->v4l2_dev, |
Laurent Pinchart | 9a1f8b3 | 2010-09-24 10:16:44 -0300 | [diff] [blame] | 271 | &usbvision->i2c_adap, |
Hans Verkuil | 53dacb1 | 2009-08-10 02:49:08 -0300 | [diff] [blame] | 272 | "tuner", 0, v4l2_i2c_tuner_addrs(type)); |
Hans Verkuil | 1df7953 | 2009-02-21 18:11:31 -0300 | [diff] [blame] | 273 | |
Hans Verkuil | 8403472 | 2010-09-17 15:07:28 -0300 | [diff] [blame] | 274 | if (sd == NULL) |
| 275 | return -ENODEV; |
Hans Verkuil | 1df7953 | 2009-02-21 18:11:31 -0300 | [diff] [blame] | 276 | if (usbvision->tuner_type != -1) { |
| 277 | tun_setup.mode_mask = T_ANALOG_TV | T_RADIO; |
| 278 | tun_setup.type = usbvision->tuner_type; |
| 279 | tun_setup.addr = v4l2_i2c_subdev_addr(sd); |
| 280 | call_all(usbvision, tuner, s_type_addr, &tun_setup); |
| 281 | } |
| 282 | } |
Hans Verkuil | 8403472 | 2010-09-17 15:07:28 -0300 | [diff] [blame] | 283 | usbvision->registered_i2c = 1; |
Hans Verkuil | 1df7953 | 2009-02-21 18:11:31 -0300 | [diff] [blame] | 284 | |
| 285 | return 0; |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 286 | } |
| 287 | |
| 288 | int usbvision_i2c_unregister(struct usb_usbvision *usbvision) |
| 289 | { |
Hans Verkuil | 8403472 | 2010-09-17 15:07:28 -0300 | [diff] [blame] | 290 | if (!usbvision->registered_i2c) |
| 291 | return 0; |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 292 | |
| 293 | i2c_del_adapter(&(usbvision->i2c_adap)); |
Hans Verkuil | 8403472 | 2010-09-17 15:07:28 -0300 | [diff] [blame] | 294 | usbvision->registered_i2c = 0; |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 295 | |
| 296 | PDEBUG(DBG_I2C,"i2c bus for %s unregistered", usbvision->i2c_adap.name); |
| 297 | |
| 298 | return 0; |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 299 | } |
| 300 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 301 | static int |
| 302 | usbvision_i2c_read_max4(struct usb_usbvision *usbvision, unsigned char addr, |
| 303 | char *buf, short len) |
| 304 | { |
| 305 | int rc, retries; |
| 306 | |
| 307 | for (retries = 5;;) { |
| 308 | rc = usbvision_write_reg(usbvision, USBVISION_SER_ADRS, addr); |
| 309 | if (rc < 0) |
| 310 | return rc; |
| 311 | |
| 312 | /* Initiate byte read cycle */ |
| 313 | /* USBVISION_SER_CONT <- d0-d2 n. of bytes to r/w */ |
| 314 | /* d3 0=Wr 1=Rd */ |
| 315 | rc = usbvision_write_reg(usbvision, USBVISION_SER_CONT, |
| 316 | (len & 0x07) | 0x18); |
| 317 | if (rc < 0) |
| 318 | return rc; |
| 319 | |
| 320 | /* Test for Busy and ACK */ |
| 321 | do { |
| 322 | /* USBVISION_SER_CONT -> d4 == 0 busy */ |
| 323 | rc = usbvision_read_reg(usbvision, USBVISION_SER_CONT); |
| 324 | } while (rc > 0 && ((rc & 0x10) != 0)); /* Retry while busy */ |
| 325 | if (rc < 0) |
| 326 | return rc; |
| 327 | |
| 328 | /* USBVISION_SER_CONT -> d5 == 1 Not ack */ |
| 329 | if ((rc & 0x20) == 0) /* Ack? */ |
| 330 | break; |
| 331 | |
| 332 | /* I2C abort */ |
| 333 | rc = usbvision_write_reg(usbvision, USBVISION_SER_CONT, 0x00); |
| 334 | if (rc < 0) |
| 335 | return rc; |
| 336 | |
| 337 | if (--retries < 0) |
| 338 | return -1; |
| 339 | } |
| 340 | |
| 341 | switch (len) { |
| 342 | case 4: |
| 343 | buf[3] = usbvision_read_reg(usbvision, USBVISION_SER_DAT4); |
| 344 | case 3: |
| 345 | buf[2] = usbvision_read_reg(usbvision, USBVISION_SER_DAT3); |
| 346 | case 2: |
| 347 | buf[1] = usbvision_read_reg(usbvision, USBVISION_SER_DAT2); |
| 348 | case 1: |
| 349 | buf[0] = usbvision_read_reg(usbvision, USBVISION_SER_DAT1); |
| 350 | break; |
| 351 | default: |
| 352 | printk(KERN_ERR |
| 353 | "usbvision_i2c_read_max4: buffer length > 4\n"); |
| 354 | } |
| 355 | |
| 356 | if (i2c_debug & DBG_I2C) { |
| 357 | int idx; |
| 358 | for (idx = 0; idx < len; idx++) { |
| 359 | PDEBUG(DBG_I2C,"read %x from address %x", (unsigned char)buf[idx], addr); |
| 360 | } |
| 361 | } |
| 362 | return len; |
| 363 | } |
| 364 | |
| 365 | |
| 366 | static int usbvision_i2c_write_max4(struct usb_usbvision *usbvision, |
| 367 | unsigned char addr, const char *buf, |
| 368 | short len) |
| 369 | { |
| 370 | int rc, retries; |
| 371 | int i; |
| 372 | unsigned char value[6]; |
| 373 | unsigned char ser_cont; |
| 374 | |
| 375 | ser_cont = (len & 0x07) | 0x10; |
| 376 | |
| 377 | value[0] = addr; |
| 378 | value[1] = ser_cont; |
| 379 | for (i = 0; i < len; i++) |
| 380 | value[i + 2] = buf[i]; |
| 381 | |
| 382 | for (retries = 5;;) { |
| 383 | rc = usb_control_msg(usbvision->dev, |
| 384 | usb_sndctrlpipe(usbvision->dev, 1), |
| 385 | USBVISION_OP_CODE, |
| 386 | USB_DIR_OUT | USB_TYPE_VENDOR | |
| 387 | USB_RECIP_ENDPOINT, 0, |
| 388 | (__u16) USBVISION_SER_ADRS, value, |
| 389 | len + 2, HZ); |
| 390 | |
| 391 | if (rc < 0) |
| 392 | return rc; |
| 393 | |
| 394 | rc = usbvision_write_reg(usbvision, USBVISION_SER_CONT, |
| 395 | (len & 0x07) | 0x10); |
| 396 | if (rc < 0) |
| 397 | return rc; |
| 398 | |
| 399 | /* Test for Busy and ACK */ |
| 400 | do { |
| 401 | rc = usbvision_read_reg(usbvision, USBVISION_SER_CONT); |
| 402 | } while (rc > 0 && ((rc & 0x10) != 0)); /* Retry while busy */ |
| 403 | if (rc < 0) |
| 404 | return rc; |
| 405 | |
| 406 | if ((rc & 0x20) == 0) /* Ack? */ |
| 407 | break; |
| 408 | |
| 409 | /* I2C abort */ |
| 410 | usbvision_write_reg(usbvision, USBVISION_SER_CONT, 0x00); |
| 411 | |
| 412 | if (--retries < 0) |
| 413 | return -1; |
| 414 | |
| 415 | } |
| 416 | |
| 417 | if (i2c_debug & DBG_I2C) { |
| 418 | int idx; |
| 419 | for (idx = 0; idx < len; idx++) { |
| 420 | PDEBUG(DBG_I2C,"wrote %x at address %x", (unsigned char)buf[idx], addr); |
| 421 | } |
| 422 | } |
| 423 | return len; |
| 424 | } |
| 425 | |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 426 | 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] | 427 | short len) |
| 428 | { |
| 429 | char *bufPtr = buf; |
| 430 | int retval; |
| 431 | int wrcount = 0; |
| 432 | int count; |
| 433 | int maxLen = 4; |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 434 | |
| 435 | while (len > 0) { |
| 436 | count = (len > maxLen) ? maxLen : len; |
| 437 | retval = usbvision_i2c_write_max4(usbvision, addr, bufPtr, count); |
| 438 | if (retval > 0) { |
| 439 | len -= count; |
| 440 | bufPtr += count; |
| 441 | wrcount += count; |
| 442 | } else |
| 443 | return (retval < 0) ? retval : -EFAULT; |
| 444 | } |
| 445 | return wrcount; |
| 446 | } |
| 447 | |
Thierry MERLE | 1ff16c2 | 2007-04-14 16:23:49 -0300 | [diff] [blame] | 448 | 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] | 449 | short len) |
| 450 | { |
| 451 | char temp[4]; |
| 452 | int retval, i; |
| 453 | int rdcount = 0; |
| 454 | int count; |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 455 | |
| 456 | while (len > 0) { |
| 457 | count = (len > 3) ? 4 : len; |
| 458 | retval = usbvision_i2c_read_max4(usbvision, addr, temp, count); |
| 459 | if (retval > 0) { |
| 460 | for (i = 0; i < len; i++) |
| 461 | buf[rdcount + i] = temp[i]; |
| 462 | len -= count; |
| 463 | rdcount += count; |
| 464 | } else |
| 465 | return (retval < 0) ? retval : -EFAULT; |
| 466 | } |
| 467 | return rdcount; |
| 468 | } |
| 469 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 470 | static struct i2c_adapter i2c_adap_template = { |
| 471 | .owner = THIS_MODULE, |
| 472 | .name = "usbvision", |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 473 | }; |
| 474 | |
Thierry MERLE | 483dfdb | 2006-12-04 08:31:45 -0300 | [diff] [blame] | 475 | /* |
| 476 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 477 | * --------------------------------------------------------------------------- |
| 478 | * Local variables: |
| 479 | * c-basic-offset: 8 |
| 480 | * End: |
| 481 | */ |