57 static void gpu_enable_i2c_bus(struct gpu_i2c_dev *i2cd)  in gpu_enable_i2c_bus()  argument
62 	val = readl(i2cd->regs + I2C_MST_HYBRID_PADCTL);  in gpu_enable_i2c_bus()
66 	writel(val, i2cd->regs + I2C_MST_HYBRID_PADCTL);  in gpu_enable_i2c_bus()
73 	writel(val, i2cd->regs + I2C_MST_I2C0_TIMING);  in gpu_enable_i2c_bus()
76 static int gpu_i2c_check_status(struct gpu_i2c_dev *i2cd)  in gpu_i2c_check_status()  argument
82 		val = readl(i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_check_status()
92 		dev_err(i2cd->dev, "i2c timeout error %x\n", val);  in gpu_i2c_check_status()
96 	val = readl(i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_check_status()
109 static int gpu_i2c_read(struct gpu_i2c_dev *i2cd, u8 *data, u16 len)  in gpu_i2c_read()  argument
117 	writel(val, i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_read()
119 	status = gpu_i2c_check_status(i2cd);  in gpu_i2c_read()
123 	val = readl(i2cd->regs + I2C_MST_DATA);  in gpu_i2c_read()
144 static int gpu_i2c_start(struct gpu_i2c_dev *i2cd)  in gpu_i2c_start()  argument
146 	writel(I2C_MST_CNTL_GEN_START, i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_start()
147 	return gpu_i2c_check_status(i2cd);  in gpu_i2c_start()
150 static int gpu_i2c_stop(struct gpu_i2c_dev *i2cd)  in gpu_i2c_stop()  argument
152 	writel(I2C_MST_CNTL_GEN_STOP, i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_stop()
153 	return gpu_i2c_check_status(i2cd);  in gpu_i2c_stop()
156 static int gpu_i2c_write(struct gpu_i2c_dev *i2cd, u8 data)  in gpu_i2c_write()  argument
160 	writel(data, i2cd->regs + I2C_MST_DATA);  in gpu_i2c_write()
163 	writel(val, i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_write()
165 	return gpu_i2c_check_status(i2cd);  in gpu_i2c_write()
171 	struct gpu_i2c_dev *i2cd = i2c_get_adapdata(adap);  in gpu_i2c_master_xfer()  local
180 	pm_runtime_get_sync(i2cd->dev);  in gpu_i2c_master_xfer()
184 			writel(msgs[i].addr, i2cd->regs + I2C_MST_ADDR);  in gpu_i2c_master_xfer()
186 			status = gpu_i2c_read(i2cd, msgs[i].buf, msgs[i].len);  in gpu_i2c_master_xfer()
192 			status = gpu_i2c_start(i2cd);  in gpu_i2c_master_xfer()
199 			status = gpu_i2c_write(i2cd, addr);  in gpu_i2c_master_xfer()
204 				status = gpu_i2c_write(i2cd, msgs[i].buf[j]);  in gpu_i2c_master_xfer()
211 	status = gpu_i2c_stop(i2cd);  in gpu_i2c_master_xfer()
218 		status2 = gpu_i2c_stop(i2cd);  in gpu_i2c_master_xfer()
220 			dev_err(i2cd->dev, "i2c stop failed %d\n", status2);  in gpu_i2c_master_xfer()
222 	pm_runtime_mark_last_busy(i2cd->dev);  in gpu_i2c_master_xfer()
223 	pm_runtime_put_autosuspend(i2cd->dev);  in gpu_i2c_master_xfer()
270 static int gpu_populate_client(struct gpu_i2c_dev *i2cd, int irq)  in gpu_populate_client()  argument
272 	i2cd->gpu_ccgx_ucsi = devm_kzalloc(i2cd->dev,  in gpu_populate_client()
273 					   sizeof(*i2cd->gpu_ccgx_ucsi),  in gpu_populate_client()
275 	if (!i2cd->gpu_ccgx_ucsi)  in gpu_populate_client()
278 	strlcpy(i2cd->gpu_ccgx_ucsi->type, "ccgx-ucsi",  in gpu_populate_client()
279 		sizeof(i2cd->gpu_ccgx_ucsi->type));  in gpu_populate_client()
280 	i2cd->gpu_ccgx_ucsi->addr = 0x8;  in gpu_populate_client()
281 	i2cd->gpu_ccgx_ucsi->irq = irq;  in gpu_populate_client()
282 	i2cd->gpu_ccgx_ucsi->properties = ccgx_props;  in gpu_populate_client()
283 	i2cd->ccgx_client = i2c_new_device(&i2cd->adapter, i2cd->gpu_ccgx_ucsi);  in gpu_populate_client()
284 	if (!i2cd->ccgx_client)  in gpu_populate_client()
292 	struct gpu_i2c_dev *i2cd;  in gpu_i2c_probe()  local
295 	i2cd = devm_kzalloc(&pdev->dev, sizeof(*i2cd), GFP_KERNEL);  in gpu_i2c_probe()
296 	if (!i2cd)  in gpu_i2c_probe()
299 	i2cd->dev = &pdev->dev;  in gpu_i2c_probe()
300 	dev_set_drvdata(&pdev->dev, i2cd);  in gpu_i2c_probe()
310 	i2cd->regs = pcim_iomap(pdev, 0, 0);  in gpu_i2c_probe()
311 	if (!i2cd->regs) {  in gpu_i2c_probe()
322 	gpu_enable_i2c_bus(i2cd);  in gpu_i2c_probe()
324 	i2c_set_adapdata(&i2cd->adapter, i2cd);  in gpu_i2c_probe()
325 	i2cd->adapter.owner = THIS_MODULE;  in gpu_i2c_probe()
326 	strlcpy(i2cd->adapter.name, "NVIDIA GPU I2C adapter",  in gpu_i2c_probe()
327 		sizeof(i2cd->adapter.name));  in gpu_i2c_probe()
328 	i2cd->adapter.algo = &gpu_i2c_algorithm;  in gpu_i2c_probe()
329 	i2cd->adapter.quirks = &gpu_i2c_quirks;  in gpu_i2c_probe()
330 	i2cd->adapter.dev.parent = &pdev->dev;  in gpu_i2c_probe()
331 	status = i2c_add_adapter(&i2cd->adapter);  in gpu_i2c_probe()
335 	status = gpu_populate_client(i2cd, pdev->irq);  in gpu_i2c_probe()
349 	i2c_del_adapter(&i2cd->adapter);  in gpu_i2c_probe()
357 	struct gpu_i2c_dev *i2cd = dev_get_drvdata(&pdev->dev);  in gpu_i2c_remove()  local
359 	pm_runtime_get_noresume(i2cd->dev);  in gpu_i2c_remove()
360 	i2c_del_adapter(&i2cd->adapter);  in gpu_i2c_remove()
376 	struct gpu_i2c_dev *i2cd = dev_get_drvdata(dev);  in gpu_i2c_resume()  local
378 	gpu_enable_i2c_bus(i2cd);  in gpu_i2c_resume()
385 	pm_request_resume(&i2cd->ccgx_client->dev);  in gpu_i2c_resume()