58 static void gpu_enable_i2c_bus(struct gpu_i2c_dev *i2cd)  in gpu_enable_i2c_bus()  argument
63 	val = readl(i2cd->regs + I2C_MST_HYBRID_PADCTL);  in gpu_enable_i2c_bus()
67 	writel(val, i2cd->regs + I2C_MST_HYBRID_PADCTL);  in gpu_enable_i2c_bus()
74 	writel(val, i2cd->regs + I2C_MST_I2C0_TIMING);  in gpu_enable_i2c_bus()
77 static int gpu_i2c_check_status(struct gpu_i2c_dev *i2cd)  in gpu_i2c_check_status()  argument
82 	ret = readl_poll_timeout(i2cd->regs + I2C_MST_CNTL, val,  in gpu_i2c_check_status()
88 		dev_err(i2cd->dev, "i2c timeout error %x\n", val);  in gpu_i2c_check_status()
92 	val = readl(i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_check_status()
105 static int gpu_i2c_read(struct gpu_i2c_dev *i2cd, u8 *data, u16 len)  in gpu_i2c_read()  argument
113 	writel(val, i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_read()
115 	status = gpu_i2c_check_status(i2cd);  in gpu_i2c_read()
119 	val = readl(i2cd->regs + I2C_MST_DATA);  in gpu_i2c_read()
139 static int gpu_i2c_start(struct gpu_i2c_dev *i2cd)  in gpu_i2c_start()  argument
141 	writel(I2C_MST_CNTL_GEN_START, i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_start()
142 	return gpu_i2c_check_status(i2cd);  in gpu_i2c_start()
145 static int gpu_i2c_stop(struct gpu_i2c_dev *i2cd)  in gpu_i2c_stop()  argument
147 	writel(I2C_MST_CNTL_GEN_STOP, i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_stop()
148 	return gpu_i2c_check_status(i2cd);  in gpu_i2c_stop()
151 static int gpu_i2c_write(struct gpu_i2c_dev *i2cd, u8 data)  in gpu_i2c_write()  argument
155 	writel(data, i2cd->regs + I2C_MST_DATA);  in gpu_i2c_write()
158 	writel(val, i2cd->regs + I2C_MST_CNTL);  in gpu_i2c_write()
160 	return gpu_i2c_check_status(i2cd);  in gpu_i2c_write()
166 	struct gpu_i2c_dev *i2cd = i2c_get_adapdata(adap);  in gpu_i2c_master_xfer()  local
175 	pm_runtime_get_sync(i2cd->dev);  in gpu_i2c_master_xfer()
179 			writel(msgs[i].addr, i2cd->regs + I2C_MST_ADDR);  in gpu_i2c_master_xfer()
181 			status = gpu_i2c_read(i2cd, msgs[i].buf, msgs[i].len);  in gpu_i2c_master_xfer()
187 			status = gpu_i2c_start(i2cd);  in gpu_i2c_master_xfer()
194 			status = gpu_i2c_write(i2cd, addr);  in gpu_i2c_master_xfer()
199 				status = gpu_i2c_write(i2cd, msgs[i].buf[j]);  in gpu_i2c_master_xfer()
206 	status = gpu_i2c_stop(i2cd);  in gpu_i2c_master_xfer()
213 		status2 = gpu_i2c_stop(i2cd);  in gpu_i2c_master_xfer()
215 			dev_err(i2cd->dev, "i2c stop failed %d\n", status2);  in gpu_i2c_master_xfer()
217 	pm_runtime_mark_last_busy(i2cd->dev);  in gpu_i2c_master_xfer()
218 	pm_runtime_put_autosuspend(i2cd->dev);  in gpu_i2c_master_xfer()
269 static int gpu_populate_client(struct gpu_i2c_dev *i2cd, int irq)  in gpu_populate_client()  argument
271 	i2cd->gpu_ccgx_ucsi = devm_kzalloc(i2cd->dev,  in gpu_populate_client()
272 					   sizeof(*i2cd->gpu_ccgx_ucsi),  in gpu_populate_client()
274 	if (!i2cd->gpu_ccgx_ucsi)  in gpu_populate_client()
277 	strlcpy(i2cd->gpu_ccgx_ucsi->type, "ccgx-ucsi",  in gpu_populate_client()
278 		sizeof(i2cd->gpu_ccgx_ucsi->type));  in gpu_populate_client()
279 	i2cd->gpu_ccgx_ucsi->addr = 0x8;  in gpu_populate_client()
280 	i2cd->gpu_ccgx_ucsi->irq = irq;  in gpu_populate_client()
281 	i2cd->gpu_ccgx_ucsi->swnode = &ccgx_node;  in gpu_populate_client()
282 	i2cd->ccgx_client = i2c_new_client_device(&i2cd->adapter, i2cd->gpu_ccgx_ucsi);  in gpu_populate_client()
283 	return PTR_ERR_OR_ZERO(i2cd->ccgx_client);  in gpu_populate_client()
288 	struct gpu_i2c_dev *i2cd;  in gpu_i2c_probe()  local
291 	i2cd = devm_kzalloc(&pdev->dev, sizeof(*i2cd), GFP_KERNEL);  in gpu_i2c_probe()
292 	if (!i2cd)  in gpu_i2c_probe()
295 	i2cd->dev = &pdev->dev;  in gpu_i2c_probe()
296 	dev_set_drvdata(&pdev->dev, i2cd);  in gpu_i2c_probe()
306 	i2cd->regs = pcim_iomap(pdev, 0, 0);  in gpu_i2c_probe()
307 	if (!i2cd->regs) {  in gpu_i2c_probe()
318 	gpu_enable_i2c_bus(i2cd);  in gpu_i2c_probe()
320 	i2c_set_adapdata(&i2cd->adapter, i2cd);  in gpu_i2c_probe()
321 	i2cd->adapter.owner = THIS_MODULE;  in gpu_i2c_probe()
322 	strlcpy(i2cd->adapter.name, "NVIDIA GPU I2C adapter",  in gpu_i2c_probe()
323 		sizeof(i2cd->adapter.name));  in gpu_i2c_probe()
324 	i2cd->adapter.algo = &gpu_i2c_algorithm;  in gpu_i2c_probe()
325 	i2cd->adapter.quirks = &gpu_i2c_quirks;  in gpu_i2c_probe()
326 	i2cd->adapter.dev.parent = &pdev->dev;  in gpu_i2c_probe()
327 	status = i2c_add_adapter(&i2cd->adapter);  in gpu_i2c_probe()
331 	status = gpu_populate_client(i2cd, pdev->irq);  in gpu_i2c_probe()
345 	i2c_del_adapter(&i2cd->adapter);  in gpu_i2c_probe()
353 	struct gpu_i2c_dev *i2cd = dev_get_drvdata(&pdev->dev);  in gpu_i2c_remove()  local
355 	pm_runtime_get_noresume(i2cd->dev);  in gpu_i2c_remove()
356 	i2c_del_adapter(&i2cd->adapter);  in gpu_i2c_remove()
364 	struct gpu_i2c_dev *i2cd = dev_get_drvdata(dev);  in gpu_i2c_resume()  local
366 	gpu_enable_i2c_bus(i2cd);  in gpu_i2c_resume()
373 	pm_request_resume(&i2cd->ccgx_client->dev);  in gpu_i2c_resume()