1 // SPDX-License-Identifier: GPL-2.0
30 	{ "INTC10D2" }, /* MTL-CVF */
42 static void usbio_i2c_uninit(struct i2c_adapter *adap, struct i2c_msg *msg)  in usbio_i2c_uninit()  argument
47 	ubuf.busid = i2c->adev->id;  in usbio_i2c_uninit()
48 	ubuf.config = cpu_to_le16(msg->addr);  in usbio_i2c_uninit()
50 	usbio_bulk_msg(i2c->adev, USBIO_PKTTYPE_I2C, USBIO_I2CCMD_UNINIT, true,  in usbio_i2c_uninit()
54 static int usbio_i2c_init(struct i2c_adapter *adap, struct i2c_msg *msg)  in usbio_i2c_init()  argument
62 	ibuf.busid = i2c->adev->id;  in usbio_i2c_init()
63 	ibuf.config = cpu_to_le16(msg->addr);  in usbio_i2c_init()
64 	ibuf.speed = cpu_to_le32(i2c->speed);  in usbio_i2c_init()
66 	if (i2c->quirks & USBIO_QUIRK_I2C_NO_INIT_ACK) {  in usbio_i2c_init()
74 	ret = usbio_bulk_msg(i2c->adev, USBIO_PKTTYPE_I2C, USBIO_I2CCMD_INIT, true,  in usbio_i2c_init()
77 		return (ret < 0) ? ret : -EIO;  in usbio_i2c_init()
82 static int usbio_i2c_read(struct i2c_adapter *adap, struct i2c_msg *msg)  in usbio_i2c_read()  argument
85 	u16 rxchunk = i2c->rxbuf_len - I2C_RW_OVERHEAD;  in usbio_i2c_read()
86 	struct usbio_i2c_rw *rbuf = i2c->rwbuf;  in usbio_i2c_read()
89 	rbuf->busid = i2c->adev->id;  in usbio_i2c_read()
90 	rbuf->config = cpu_to_le16(msg->addr);  in usbio_i2c_read()
91 	rbuf->size = cpu_to_le16(msg->len);  in usbio_i2c_read()
93 	if (msg->len > rxchunk) {  in usbio_i2c_read()
98 			if (msg->len - len < rxchunk)  in usbio_i2c_read()
99 				rxchunk = msg->len - len;  in usbio_i2c_read()
101 			ret = usbio_bulk_msg(i2c->adev, USBIO_PKTTYPE_I2C,  in usbio_i2c_read()
108 			memcpy(&msg->buf[len], rbuf->data, rxchunk);  in usbio_i2c_read()
110 		} while (msg->len > len);  in usbio_i2c_read()
115 	ret = usbio_bulk_msg(i2c->adev, USBIO_PKTTYPE_I2C, USBIO_I2CCMD_READ, true,  in usbio_i2c_read()
116 			     rbuf, sizeof(*rbuf), rbuf, sizeof(*rbuf) + msg->len);  in usbio_i2c_read()
117 	if (ret != sizeof(*rbuf) + msg->len)  in usbio_i2c_read()
118 		return (ret < 0) ? ret : -EIO;  in usbio_i2c_read()
120 	memcpy(msg->buf, rbuf->data, msg->len);  in usbio_i2c_read()
125 static int usbio_i2c_write(struct i2c_adapter *adap, struct i2c_msg *msg)  in usbio_i2c_write()  argument
128 	u16 txchunk = i2c->txbuf_len - I2C_RW_OVERHEAD;  in usbio_i2c_write()
129 	struct usbio_i2c_rw *wbuf = i2c->rwbuf;  in usbio_i2c_write()
132 	if (msg->len > txchunk) {  in usbio_i2c_write()
137 			wbuf->busid = i2c->adev->id;  in usbio_i2c_write()
138 			wbuf->config = cpu_to_le16(msg->addr);  in usbio_i2c_write()
140 			if (i2c->quirks & USBIO_QUIRK_I2C_USE_CHUNK_LEN)  in usbio_i2c_write()
141 				wbuf->size = cpu_to_le16(txchunk);  in usbio_i2c_write()
143 				wbuf->size = cpu_to_le16(msg->len);  in usbio_i2c_write()
145 			memcpy(wbuf->data, &msg->buf[len], txchunk);  in usbio_i2c_write()
148 			ret = usbio_bulk_msg(i2c->adev, USBIO_PKTTYPE_I2C,  in usbio_i2c_write()
149 					     USBIO_I2CCMD_WRITE, msg->len == len,  in usbio_i2c_write()
155 			if (msg->len - len < txchunk)  in usbio_i2c_write()
156 				txchunk = msg->len - len;  in usbio_i2c_write()
157 		} while (msg->len > len);  in usbio_i2c_write()
162 	wbuf->busid = i2c->adev->id;  in usbio_i2c_write()
163 	wbuf->config = cpu_to_le16(msg->addr);  in usbio_i2c_write()
164 	wbuf->size = cpu_to_le16(msg->len);  in usbio_i2c_write()
165 	memcpy(wbuf->data, msg->buf, msg->len);  in usbio_i2c_write()
167 	ret = usbio_bulk_msg(i2c->adev, USBIO_PKTTYPE_I2C, USBIO_I2CCMD_WRITE, true,  in usbio_i2c_write()
168 			     wbuf, sizeof(*wbuf) + msg->len, wbuf, sizeof(*wbuf));  in usbio_i2c_write()
169 	if (ret != sizeof(*wbuf) || le16_to_cpu(wbuf->size) != msg->len)  in usbio_i2c_write()
170 		return (ret < 0) ? ret : -EIO;  in usbio_i2c_write()
180 	usbio_acquire(i2c->adev);  in usbio_i2c_xfer()
199 	usbio_release(i2c->adev);  in usbio_i2c_xfer()
230 	struct device *dev = &adev->dev;  in usbio_i2c_probe()
237 		return -EINVAL;  in usbio_i2c_probe()
241 		return -ENOMEM;  in usbio_i2c_probe()
243 	i2c->adev = adev;  in usbio_i2c_probe()
245 	usbio_acpi_bind(i2c->adev, usbio_i2c_acpi_hids);  in usbio_i2c_probe()
246 	usbio_get_txrxbuf_len(i2c->adev, &i2c->txbuf_len, &i2c->rxbuf_len);  in usbio_i2c_probe()
248 	i2c->rwbuf = devm_kzalloc(dev, max(i2c->txbuf_len, i2c->rxbuf_len), GFP_KERNEL);  in usbio_i2c_probe()
249 	if (!i2c->rwbuf)  in usbio_i2c_probe()
250 		return -ENOMEM;  in usbio_i2c_probe()
252 	i2c->quirks = usbio_get_quirks(i2c->adev);  in usbio_i2c_probe()
254 	max_speed = usbio_i2c_speeds[i2c_desc->caps & USBIO_I2C_BUS_MODE_CAP_MASK];  in usbio_i2c_probe()
256 	    (i2c->quirks & USBIO_QUIRK_I2C_ALLOW_400KHZ))  in usbio_i2c_probe()
259 	i2c->speed = i2c_acpi_find_bus_speed(dev);  in usbio_i2c_probe()
260 	if (!i2c->speed)  in usbio_i2c_probe()
261 		i2c->speed = I2C_MAX_STANDARD_MODE_FREQ;  in usbio_i2c_probe()
262 	else if (i2c->speed > max_speed) {  in usbio_i2c_probe()
263 		dev_warn(dev, "Invalid speed %u adjusting to bus max %u\n",  in usbio_i2c_probe()
264 			 i2c->speed, max_speed);  in usbio_i2c_probe()
265 		i2c->speed = max_speed;  in usbio_i2c_probe()
268 	i2c->adap.owner = THIS_MODULE;  in usbio_i2c_probe()
269 	i2c->adap.class = I2C_CLASS_HWMON;  in usbio_i2c_probe()
270 	i2c->adap.dev.parent = dev;  in usbio_i2c_probe()
271 	i2c->adap.algo = &usbio_i2c_algo;  in usbio_i2c_probe()
273 	if (i2c->quirks & USBIO_QUIRK_I2C_MAX_RW_LEN_52)  in usbio_i2c_probe()
274 		i2c->adap.quirks = &usbio_i2c_quirks_max_rw_len52;  in usbio_i2c_probe()
276 		i2c->adap.quirks = &usbio_i2c_quirks;  in usbio_i2c_probe()
278 	snprintf(i2c->adap.name, sizeof(i2c->adap.name), "%s.%d",  in usbio_i2c_probe()
279 		 USBIO_I2C_CLIENT, i2c->adev->id);  in usbio_i2c_probe()
281 	device_set_node(&i2c->adap.dev, dev_fwnode(&adev->dev));  in usbio_i2c_probe()
284 	i2c_set_adapdata(&i2c->adap, i2c);  in usbio_i2c_probe()
286 	ret = i2c_add_adapter(&i2c->adap);  in usbio_i2c_probe()
290 	if (has_acpi_companion(&i2c->adap.dev))  in usbio_i2c_probe()
291 		acpi_dev_clear_dependencies(ACPI_COMPANION(&i2c->adap.dev));  in usbio_i2c_probe()
300 	i2c_del_adapter(&i2c->adap);  in usbio_i2c_remove()
304 	{ "usbio.usbio-i2c" },