1 2 /* 3 * Hauppauge HD PVR USB driver 4 * 5 * Copyright (C) 2008 Janne Grunau (j@jannau.net) 6 * 7 * IR device registration code is 8 * Copyright (C) 2010 Andy Walls <awalls@md.metrocast.net> 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License as 12 * published by the Free Software Foundation, version 2. 13 * 14 */ 15 16 #if IS_ENABLED(CONFIG_I2C) 17 18 #include <linux/i2c.h> 19 #include <linux/slab.h> 20 #include <linux/export.h> 21 22 #include "hdpvr.h" 23 24 #define CTRL_READ_REQUEST 0xb8 25 #define CTRL_WRITE_REQUEST 0x38 26 27 #define REQTYPE_I2C_READ 0xb1 28 #define REQTYPE_I2C_WRITE 0xb0 29 #define REQTYPE_I2C_WRITE_STATT 0xd0 30 31 #define Z8F0811_IR_TX_I2C_ADDR 0x70 32 #define Z8F0811_IR_RX_I2C_ADDR 0x71 33 34 35 struct i2c_client *hdpvr_register_ir_tx_i2c(struct hdpvr_device *dev) 36 { 37 struct IR_i2c_init_data *init_data = &dev->ir_i2c_init_data; 38 struct i2c_board_info hdpvr_ir_tx_i2c_board_info = { 39 I2C_BOARD_INFO("ir_tx_z8f0811_hdpvr", Z8F0811_IR_TX_I2C_ADDR), 40 }; 41 42 init_data->name = "HD-PVR"; 43 hdpvr_ir_tx_i2c_board_info.platform_data = init_data; 44 45 return i2c_new_device(&dev->i2c_adapter, &hdpvr_ir_tx_i2c_board_info); 46 } 47 48 struct i2c_client *hdpvr_register_ir_rx_i2c(struct hdpvr_device *dev) 49 { 50 struct IR_i2c_init_data *init_data = &dev->ir_i2c_init_data; 51 struct i2c_board_info hdpvr_ir_rx_i2c_board_info = { 52 I2C_BOARD_INFO("ir_rx_z8f0811_hdpvr", Z8F0811_IR_RX_I2C_ADDR), 53 }; 54 55 /* Our default information for ir-kbd-i2c.c to use */ 56 init_data->ir_codes = RC_MAP_HAUPPAUGE; 57 init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR; 58 init_data->type = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_MCE | 59 RC_PROTO_BIT_RC6_6A_32; 60 init_data->name = "HD-PVR"; 61 init_data->polling_interval = 405; /* ms, duplicated from Windows */ 62 hdpvr_ir_rx_i2c_board_info.platform_data = init_data; 63 64 return i2c_new_device(&dev->i2c_adapter, &hdpvr_ir_rx_i2c_board_info); 65 } 66 67 static int hdpvr_i2c_read(struct hdpvr_device *dev, int bus, 68 unsigned char addr, char *wdata, int wlen, 69 char *data, int len) 70 { 71 int ret; 72 73 if ((len > sizeof(dev->i2c_buf)) || (wlen > sizeof(dev->i2c_buf))) 74 return -EINVAL; 75 76 if (wlen) { 77 memcpy(&dev->i2c_buf, wdata, wlen); 78 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), 79 REQTYPE_I2C_WRITE, CTRL_WRITE_REQUEST, 80 (bus << 8) | addr, 0, &dev->i2c_buf, 81 wlen, 1000); 82 if (ret < 0) 83 return ret; 84 } 85 86 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), 87 REQTYPE_I2C_READ, CTRL_READ_REQUEST, 88 (bus << 8) | addr, 0, &dev->i2c_buf, len, 1000); 89 90 if (ret == len) { 91 memcpy(data, &dev->i2c_buf, len); 92 ret = 0; 93 } else if (ret >= 0) 94 ret = -EIO; 95 96 return ret; 97 } 98 99 static int hdpvr_i2c_write(struct hdpvr_device *dev, int bus, 100 unsigned char addr, char *data, int len) 101 { 102 int ret; 103 104 if (len > sizeof(dev->i2c_buf)) 105 return -EINVAL; 106 107 memcpy(&dev->i2c_buf, data, len); 108 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), 109 REQTYPE_I2C_WRITE, CTRL_WRITE_REQUEST, 110 (bus << 8) | addr, 0, &dev->i2c_buf, len, 1000); 111 112 if (ret < 0) 113 return ret; 114 115 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), 116 REQTYPE_I2C_WRITE_STATT, CTRL_READ_REQUEST, 117 0, 0, &dev->i2c_buf, 2, 1000); 118 119 if ((ret == 2) && (dev->i2c_buf[1] == (len - 1))) 120 ret = 0; 121 else if (ret >= 0) 122 ret = -EIO; 123 124 return ret; 125 } 126 127 static int hdpvr_transfer(struct i2c_adapter *i2c_adapter, struct i2c_msg *msgs, 128 int num) 129 { 130 struct hdpvr_device *dev = i2c_get_adapdata(i2c_adapter); 131 int retval = 0, addr; 132 133 if (num <= 0) 134 return 0; 135 136 mutex_lock(&dev->i2c_mutex); 137 138 addr = msgs[0].addr << 1; 139 140 if (num == 1) { 141 if (msgs[0].flags & I2C_M_RD) 142 retval = hdpvr_i2c_read(dev, 1, addr, NULL, 0, 143 msgs[0].buf, msgs[0].len); 144 else 145 retval = hdpvr_i2c_write(dev, 1, addr, msgs[0].buf, 146 msgs[0].len); 147 } else if (num == 2) { 148 if (msgs[0].addr != msgs[1].addr) { 149 v4l2_warn(&dev->v4l2_dev, "refusing 2-phase i2c xfer with conflicting target addresses\n"); 150 retval = -EINVAL; 151 goto out; 152 } 153 154 if ((msgs[0].flags & I2C_M_RD) || !(msgs[1].flags & I2C_M_RD)) { 155 v4l2_warn(&dev->v4l2_dev, "refusing complex xfer with r0=%d, r1=%d\n", 156 msgs[0].flags & I2C_M_RD, 157 msgs[1].flags & I2C_M_RD); 158 retval = -EINVAL; 159 goto out; 160 } 161 162 /* 163 * Write followed by atomic read is the only complex xfer that 164 * we actually support here. 165 */ 166 retval = hdpvr_i2c_read(dev, 1, addr, msgs[0].buf, msgs[0].len, 167 msgs[1].buf, msgs[1].len); 168 } else { 169 v4l2_warn(&dev->v4l2_dev, "refusing %d-phase i2c xfer\n", num); 170 } 171 172 out: 173 mutex_unlock(&dev->i2c_mutex); 174 175 return retval ? retval : num; 176 } 177 178 static u32 hdpvr_functionality(struct i2c_adapter *adapter) 179 { 180 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; 181 } 182 183 static const struct i2c_algorithm hdpvr_algo = { 184 .master_xfer = hdpvr_transfer, 185 .functionality = hdpvr_functionality, 186 }; 187 188 static const struct i2c_adapter hdpvr_i2c_adapter_template = { 189 .name = "Hauppage HD PVR I2C", 190 .owner = THIS_MODULE, 191 .algo = &hdpvr_algo, 192 }; 193 194 static int hdpvr_activate_ir(struct hdpvr_device *dev) 195 { 196 char buffer[2]; 197 198 mutex_lock(&dev->i2c_mutex); 199 200 hdpvr_i2c_read(dev, 0, 0x54, NULL, 0, buffer, 1); 201 202 buffer[0] = 0; 203 buffer[1] = 0x8; 204 hdpvr_i2c_write(dev, 1, 0x54, buffer, 2); 205 206 buffer[1] = 0x18; 207 hdpvr_i2c_write(dev, 1, 0x54, buffer, 2); 208 209 mutex_unlock(&dev->i2c_mutex); 210 211 return 0; 212 } 213 214 int hdpvr_register_i2c_adapter(struct hdpvr_device *dev) 215 { 216 int retval = -ENOMEM; 217 218 hdpvr_activate_ir(dev); 219 220 dev->i2c_adapter = hdpvr_i2c_adapter_template; 221 dev->i2c_adapter.dev.parent = &dev->udev->dev; 222 223 i2c_set_adapdata(&dev->i2c_adapter, dev); 224 225 retval = i2c_add_adapter(&dev->i2c_adapter); 226 227 return retval; 228 } 229 230 #endif 231