1 // SPDX-License-Identifier: GPL-2.0-only
4 * Hauppauge HD PVR USB driver
6 * Copyright (C) 2008 Janne Grunau (j@jannau.net)
8 * IR device registration code is
9 * Copyright (C) 2010 Andy Walls <awalls@md.metrocast.net>
12 #if IS_ENABLED(CONFIG_I2C)
14 #include <linux/i2c.h>
15 #include <linux/slab.h>
16 #include <linux/export.h>
20 #define CTRL_READ_REQUEST 0xb8
21 #define CTRL_WRITE_REQUEST 0x38
23 #define REQTYPE_I2C_READ 0xb1
24 #define REQTYPE_I2C_WRITE 0xb0
25 #define REQTYPE_I2C_WRITE_STATT 0xd0
27 #define Z8F0811_IR_TX_I2C_ADDR 0x70
28 #define Z8F0811_IR_RX_I2C_ADDR 0x71
31 struct i2c_client *hdpvr_register_ir_i2c(struct hdpvr_device *dev)
33 struct IR_i2c_init_data *init_data = &dev->ir_i2c_init_data;
34 struct i2c_board_info info = {
35 I2C_BOARD_INFO("ir_z8f0811_hdpvr", Z8F0811_IR_RX_I2C_ADDR),
38 /* Our default information for ir-kbd-i2c.c to use */
39 init_data->ir_codes = RC_MAP_HAUPPAUGE;
40 init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR;
41 init_data->type = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_MCE |
42 RC_PROTO_BIT_RC6_6A_32;
43 init_data->name = "HD-PVR";
44 init_data->polling_interval = 405; /* ms, duplicated from Windows */
45 info.platform_data = init_data;
47 return i2c_new_client_device(&dev->i2c_adapter, &info);
50 static int hdpvr_i2c_read(struct hdpvr_device *dev, int bus,
51 unsigned char addr, char *wdata, int wlen,
56 if ((len > sizeof(dev->i2c_buf)) || (wlen > sizeof(dev->i2c_buf)))
60 memcpy(dev->i2c_buf, wdata, wlen);
61 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
62 REQTYPE_I2C_WRITE, CTRL_WRITE_REQUEST,
63 (bus << 8) | addr, 0, dev->i2c_buf,
69 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
70 REQTYPE_I2C_READ, CTRL_READ_REQUEST,
71 (bus << 8) | addr, 0, dev->i2c_buf, len, 1000);
74 memcpy(data, dev->i2c_buf, len);
82 static int hdpvr_i2c_write(struct hdpvr_device *dev, int bus,
83 unsigned char addr, char *data, int len)
87 if (len > sizeof(dev->i2c_buf))
90 memcpy(dev->i2c_buf, data, len);
91 ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
92 REQTYPE_I2C_WRITE, CTRL_WRITE_REQUEST,
93 (bus << 8) | addr, 0, dev->i2c_buf, len, 1000);
98 ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
99 REQTYPE_I2C_WRITE_STATT, CTRL_READ_REQUEST,
100 0, 0, dev->i2c_buf, 2, 1000);
102 if ((ret == 2) && (dev->i2c_buf[1] == (len - 1)))
110 static int hdpvr_transfer(struct i2c_adapter *i2c_adapter, struct i2c_msg *msgs,
113 struct hdpvr_device *dev = i2c_get_adapdata(i2c_adapter);
114 int retval = 0, addr;
116 mutex_lock(&dev->i2c_mutex);
118 addr = msgs[0].addr << 1;
121 if (msgs[0].flags & I2C_M_RD)
122 retval = hdpvr_i2c_read(dev, 1, addr, NULL, 0,
123 msgs[0].buf, msgs[0].len);
125 retval = hdpvr_i2c_write(dev, 1, addr, msgs[0].buf,
127 } else if (num == 2) {
128 if (msgs[0].addr != msgs[1].addr) {
129 v4l2_warn(&dev->v4l2_dev, "refusing 2-phase i2c xfer with conflicting target addresses\n");
134 if ((msgs[0].flags & I2C_M_RD) || !(msgs[1].flags & I2C_M_RD)) {
135 v4l2_warn(&dev->v4l2_dev, "refusing complex xfer with r0=%d, r1=%d\n",
136 msgs[0].flags & I2C_M_RD,
137 msgs[1].flags & I2C_M_RD);
143 * Write followed by atomic read is the only complex xfer that
144 * we actually support here.
146 retval = hdpvr_i2c_read(dev, 1, addr, msgs[0].buf, msgs[0].len,
147 msgs[1].buf, msgs[1].len);
149 v4l2_warn(&dev->v4l2_dev, "refusing %d-phase i2c xfer\n", num);
153 mutex_unlock(&dev->i2c_mutex);
155 return retval ? retval : num;
158 static u32 hdpvr_functionality(struct i2c_adapter *adapter)
160 return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
163 static const struct i2c_algorithm hdpvr_algo = {
164 .master_xfer = hdpvr_transfer,
165 .functionality = hdpvr_functionality,
168 static const struct i2c_adapter hdpvr_i2c_adapter_template = {
169 .name = "Hauppauge HD PVR I2C",
170 .owner = THIS_MODULE,
174 static int hdpvr_activate_ir(struct hdpvr_device *dev)
178 mutex_lock(&dev->i2c_mutex);
180 hdpvr_i2c_read(dev, 0, 0x54, NULL, 0, buffer, 1);
184 hdpvr_i2c_write(dev, 1, 0x54, buffer, 2);
187 hdpvr_i2c_write(dev, 1, 0x54, buffer, 2);
189 mutex_unlock(&dev->i2c_mutex);
194 int hdpvr_register_i2c_adapter(struct hdpvr_device *dev)
196 hdpvr_activate_ir(dev);
198 dev->i2c_adapter = hdpvr_i2c_adapter_template;
199 dev->i2c_adapter.dev.parent = &dev->udev->dev;
201 i2c_set_adapdata(&dev->i2c_adapter, dev);
203 return i2c_add_adapter(&dev->i2c_adapter);