1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Synopsys DesignWare I2C adapter driver (master only).
5  * Based on the TI DAVINCI I2C adapter driver.
16 #include <linux/i2c.h>
26 #include "i2c-designware-core.h"
28 #define DRIVER_NAME "i2c-designware-pci"
83 /* NAVI-AMD HCNT/LCNT/SDA hold time */
102 	struct dw_i2c_dev *dev = dev_get_drvdata(&pdev->dev);  in mfld_setup()
104 	switch (pdev->device) {  in mfld_setup()
106 		dev->timings.bus_freq_hz = I2C_MAX_STANDARD_MODE_FREQ;  in mfld_setup()
110 		c->bus_num = pdev->device - 0x817 + 3;  in mfld_setup()
115 		c->bus_num = pdev->device - 0x82C + 0;  in mfld_setup()
118 	return -ENODEV;  in mfld_setup()
130 	strscpy(info.type, "ccgx-ucsi", I2C_NAME_SIZE);  in navi_amd_register_client()
132 	info.irq = dev->irq;  in navi_amd_register_client()
134 	dev->slave = i2c_new_client_device(&dev->adapter, &info);  in navi_amd_register_client()
135 	if (IS_ERR(dev->slave))  in navi_amd_register_client()
136 		return PTR_ERR(dev->slave);  in navi_amd_register_client()
143 	struct dw_i2c_dev *dev = dev_get_drvdata(&pdev->dev);  in navi_amd_setup()
145 	dev->flags |= MODEL_AMD_NAVI_GPU;  in navi_amd_setup()
146 	dev->timings.bus_freq_hz = I2C_MAX_STANDARD_MODE_FREQ;  in navi_amd_setup()
153 	 * On Intel Merrifield the user visible i2c buses are enumerated  in mrfld_setup()
158 	switch (PCI_SLOT(pdev->devfn)) {  in mrfld_setup()
160 		c->bus_num = PCI_FUNC(pdev->devfn) + 0 + 1;  in mrfld_setup()
163 		c->bus_num = PCI_FUNC(pdev->devfn) + 4 + 1;  in mrfld_setup()
166 	return -ENODEV;  in mrfld_setup()
176 		.bus_num = -1,
181 		.bus_num = -1,
186 		.bus_num = -1,
190 		.bus_num = -1,
194 		.bus_num = -1,
198 		.bus_num = -1,
202 		.bus_num = -1,
214 	i_dev->suspended = true;  in i2c_dw_pci_suspend()
215 	i_dev->disable(i_dev);  in i2c_dw_pci_suspend()
225 	ret = i_dev->init(i_dev);  in i2c_dw_pci_resume()
226 	i_dev->suspended = false;  in i2c_dw_pci_resume()
236 			    const struct pci_device_id *id)  in i2c_dw_pci_probe()  argument
241 	struct dw_pci_controller *controller;  in i2c_dw_pci_probe()  local
244 	if (id->driver_data >= ARRAY_SIZE(dw_pci_controllers)) {  in i2c_dw_pci_probe()
245 		dev_err(&pdev->dev, "%s: invalid driver data %ld\n", __func__,  in i2c_dw_pci_probe()
246 			id->driver_data);  in i2c_dw_pci_probe()
247 		return -EINVAL;  in i2c_dw_pci_probe()
250 	controller = &dw_pci_controllers[id->driver_data];  in i2c_dw_pci_probe()
254 		dev_err(&pdev->dev, "Failed to enable I2C PCI device (%d)\n",  in i2c_dw_pci_probe()
263 		dev_err(&pdev->dev, "I/O memory remapping failed\n");  in i2c_dw_pci_probe()
267 	dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL);  in i2c_dw_pci_probe()
269 		return -ENOMEM;  in i2c_dw_pci_probe()
275 	dev->get_clk_rate_khz = controller->get_clk_rate_khz;  in i2c_dw_pci_probe()
276 	dev->timings.bus_freq_hz = I2C_MAX_FAST_MODE_FREQ;  in i2c_dw_pci_probe()
277 	dev->base = pcim_iomap_table(pdev)[0];  in i2c_dw_pci_probe()
278 	dev->dev = &pdev->dev;  in i2c_dw_pci_probe()
279 	dev->irq = pci_irq_vector(pdev, 0);  in i2c_dw_pci_probe()
280 	dev->flags |= controller->flags;  in i2c_dw_pci_probe()
284 	if (controller->setup) {  in i2c_dw_pci_probe()
285 		r = controller->setup(pdev, controller);  in i2c_dw_pci_probe()
294 	if (has_acpi_companion(&pdev->dev))  in i2c_dw_pci_probe()
295 		i2c_dw_acpi_configure(&pdev->dev);  in i2c_dw_pci_probe()
305 	if (controller->scl_sda_cfg) {  in i2c_dw_pci_probe()
306 		cfg = controller->scl_sda_cfg;  in i2c_dw_pci_probe()
307 		dev->ss_hcnt = cfg->ss_hcnt;  in i2c_dw_pci_probe()
308 		dev->fs_hcnt = cfg->fs_hcnt;  in i2c_dw_pci_probe()
309 		dev->ss_lcnt = cfg->ss_lcnt;  in i2c_dw_pci_probe()
310 		dev->fs_lcnt = cfg->fs_lcnt;  in i2c_dw_pci_probe()
311 		dev->sda_hold_time = cfg->sda_hold;  in i2c_dw_pci_probe()
314 	adap = &dev->adapter;  in i2c_dw_pci_probe()
315 	adap->owner = THIS_MODULE;  in i2c_dw_pci_probe()
316 	adap->class = 0;  in i2c_dw_pci_probe()
317 	ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev));  in i2c_dw_pci_probe()
318 	adap->nr = controller->bus_num;  in i2c_dw_pci_probe()
326 	if ((dev->flags & MODEL_MASK) == MODEL_AMD_NAVI_GPU) {  in i2c_dw_pci_probe()
329 			dev_err(dev->dev, "register client failed with %d\n", r);  in i2c_dw_pci_probe()
334 	pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);  in i2c_dw_pci_probe()
335 	pm_runtime_use_autosuspend(&pdev->dev);  in i2c_dw_pci_probe()
336 	pm_runtime_put_autosuspend(&pdev->dev);  in i2c_dw_pci_probe()
337 	pm_runtime_allow(&pdev->dev);  in i2c_dw_pci_probe()
346 	dev->disable(dev);  in i2c_dw_pci_remove()
347 	pm_runtime_forbid(&pdev->dev);  in i2c_dw_pci_remove()
348 	pm_runtime_get_noresume(&pdev->dev);  in i2c_dw_pci_remove()
350 	i2c_del_adapter(&dev->adapter);  in i2c_dw_pci_remove()
351 	devm_free_irq(&pdev->dev, dev->irq, dev);  in i2c_dw_pci_remove()
356 MODULE_ALIAS("i2c_designware-pci");
388 	/* Elkhart Lake (PSE I2C) */
418 MODULE_DESCRIPTION("Synopsys DesignWare PCI I2C bus adapter");