61 static void gpu_enable_i2c_bus(struct gpu_i2c_dev *i2cd)  in gpu_enable_i2c_bus()  argument
66 	val = readl(i2cd->regs + I2C_MST_HYBRID_PADCTL);  in gpu_enable_i2c_bus()
70 	writel(val, i2cd->regs + I2C_MST_HYBRID_PADCTL);  in gpu_enable_i2c_bus()
77 	writel(val, i2cd->regs + I2C_MST_I2C0_TIMING);  in gpu_enable_i2c_bus()
80 static int gpu_i2c_check_status(struct gpu_i2c_dev *i2cd)  in gpu_i2c_check_status()  argument
85 	ret = readl_poll_timeout(i2cd->regs + I2C_MST_CNTL, val,  in gpu_i2c_check_status()
91 		dev_err(i2cd->dev, "i2c timeout error %x\n", val);  in gpu_i2c_check_status()
95 	val = readl(i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_check_status()
108 static int gpu_i2c_read(struct gpu_i2c_dev *i2cd, u8 *data, u16 len)  in gpu_i2c_read()  argument
116 	writel(val, i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_read()
118 	status = gpu_i2c_check_status(i2cd);  in gpu_i2c_read()
122 	val = readl(i2cd->regs + I2C_MST_DATA);  in gpu_i2c_read()
142 static int gpu_i2c_start(struct gpu_i2c_dev *i2cd)  in gpu_i2c_start()  argument
144 	writel(I2C_MST_CNTL_GEN_START, i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_start()
145 	return gpu_i2c_check_status(i2cd);  in gpu_i2c_start()
148 static int gpu_i2c_stop(struct gpu_i2c_dev *i2cd)  in gpu_i2c_stop()  argument
150 	writel(I2C_MST_CNTL_GEN_STOP, i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_stop()
151 	return gpu_i2c_check_status(i2cd);  in gpu_i2c_stop()
154 static int gpu_i2c_write(struct gpu_i2c_dev *i2cd, u8 data)  in gpu_i2c_write()  argument
158 	writel(data, i2cd->regs + I2C_MST_DATA);  in gpu_i2c_write()
161 	writel(val, i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_write()
163 	return gpu_i2c_check_status(i2cd);  in gpu_i2c_write()
169 	struct gpu_i2c_dev *i2cd = i2c_get_adapdata(adap);  in gpu_i2c_master_xfer()  local
178 	pm_runtime_get_sync(i2cd->dev);  in gpu_i2c_master_xfer()
182 			writel(msgs[i].addr, i2cd->regs + I2C_MST_ADDR);  in gpu_i2c_master_xfer()
184 			status = gpu_i2c_read(i2cd, msgs[i].buf, msgs[i].len);  in gpu_i2c_master_xfer()
190 			status = gpu_i2c_start(i2cd);  in gpu_i2c_master_xfer()
197 			status = gpu_i2c_write(i2cd, addr);  in gpu_i2c_master_xfer()
202 				status = gpu_i2c_write(i2cd, msgs[i].buf[j]);  in gpu_i2c_master_xfer()
209 	status = gpu_i2c_stop(i2cd);  in gpu_i2c_master_xfer()
216 		status2 = gpu_i2c_stop(i2cd);  in gpu_i2c_master_xfer()
218 			dev_err(i2cd->dev, "i2c stop failed %d\n", status2);  in gpu_i2c_master_xfer()
220 	pm_runtime_mark_last_busy(i2cd->dev);  in gpu_i2c_master_xfer()
221 	pm_runtime_put_autosuspend(i2cd->dev);  in gpu_i2c_master_xfer()
277 	struct gpu_i2c_dev *i2cd;  in gpu_i2c_probe()  local
280 	i2cd = devm_kzalloc(dev, sizeof(*i2cd), GFP_KERNEL);  in gpu_i2c_probe()
281 	if (!i2cd)  in gpu_i2c_probe()
284 	i2cd->dev = dev;  in gpu_i2c_probe()
285 	dev_set_drvdata(dev, i2cd);  in gpu_i2c_probe()
293 	i2cd->regs = pcim_iomap(pdev, 0, 0);  in gpu_i2c_probe()
294 	if (!i2cd->regs)  in gpu_i2c_probe()
301 	gpu_enable_i2c_bus(i2cd);  in gpu_i2c_probe()
303 	i2c_set_adapdata(&i2cd->adapter, i2cd);  in gpu_i2c_probe()
304 	i2cd->adapter.owner = THIS_MODULE;  in gpu_i2c_probe()
305 	strscpy(i2cd->adapter.name, "NVIDIA GPU I2C adapter",  in gpu_i2c_probe()
306 		sizeof(i2cd->adapter.name));  in gpu_i2c_probe()
307 	i2cd->adapter.algo = &gpu_i2c_algorithm;  in gpu_i2c_probe()
308 	i2cd->adapter.quirks = &gpu_i2c_quirks;  in gpu_i2c_probe()
309 	i2cd->adapter.dev.parent = dev;  in gpu_i2c_probe()
310 	status = i2c_add_adapter(&i2cd->adapter);  in gpu_i2c_probe()
314 	i2cd->ccgx_client = i2c_new_ccgx_ucsi(&i2cd->adapter, pdev->irq, &ccgx_node);  in gpu_i2c_probe()
315 	if (IS_ERR(i2cd->ccgx_client)) {  in gpu_i2c_probe()
316 		status = dev_err_probe(dev, PTR_ERR(i2cd->ccgx_client), "register UCSI failed\n");  in gpu_i2c_probe()
328 	i2c_del_adapter(&i2cd->adapter);  in gpu_i2c_probe()
336 	struct gpu_i2c_dev *i2cd = pci_get_drvdata(pdev);  in gpu_i2c_remove()  local
338 	pm_runtime_get_noresume(i2cd->dev);  in gpu_i2c_remove()
339 	i2c_del_adapter(&i2cd->adapter);  in gpu_i2c_remove()
347 	struct gpu_i2c_dev *i2cd = dev_get_drvdata(dev);  in gpu_i2c_resume()  local
349 	gpu_enable_i2c_bus(i2cd);  in gpu_i2c_resume()
356 	pm_request_resume(&i2cd->ccgx_client->dev);  in gpu_i2c_resume()