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.
15 #include <linux/i2c.h>
27 #include "i2c-designware-core.h"
28 #include "i2c-ccgx-ucsi.h"
30 #define DRIVER_NAME "i2c-designware-pci"
91 /* NAVI-AMD HCNT/LCNT/SDA hold time */
107 	switch (pdev->device) {  in mfld_setup()
109 		dev->timings.bus_freq_hz = I2C_MAX_STANDARD_MODE_FREQ;  in mfld_setup()
113 		c->bus_num = pdev->device - 0x817 + 3;  in mfld_setup()
118 		c->bus_num = pdev->device - 0x82C + 0;  in mfld_setup()
121 	return -ENODEV;  in mfld_setup()
127 	 * On Intel Merrifield the user visible i2c buses are enumerated  in mrfld_setup()
132 	switch (PCI_SLOT(pdev->devfn)) {  in mrfld_setup()
134 		c->bus_num = PCI_FUNC(pdev->devfn) + 0 + 1;  in mrfld_setup()
137 		c->bus_num = PCI_FUNC(pdev->devfn) + 4 + 1;  in mrfld_setup()
140 	return -ENODEV;  in mrfld_setup()
157 	dev->flags |= MODEL_AMD_NAVI_GPU | ACCESS_POLLING;  in navi_amd_setup()
158 	dev->timings.bus_freq_hz = I2C_MAX_STANDARD_MODE_FREQ;  in navi_amd_setup()
164 		.bus_num = -1,
169 		.bus_num = -1,
174 		.bus_num = -1,
178 		.bus_num = -1,
182 		.bus_num = -1,
186 		.bus_num = -1,
190 		.bus_num = -1,
198 	/* USB-C doesn't power the system */
210 	struct device *device = &pdev->dev;  in i2c_dw_pci_probe()
217 	if (id->driver_data >= ARRAY_SIZE(dw_pci_controllers))  in i2c_dw_pci_probe()
218 		return dev_err_probe(device, -EINVAL, "Invalid driver data %ld\n",  in i2c_dw_pci_probe()
219 				     id->driver_data);  in i2c_dw_pci_probe()
221 	controller = &dw_pci_controllers[id->driver_data];  in i2c_dw_pci_probe()
225 		return dev_err_probe(device, r, "Failed to enable I2C PCI device\n");  in i2c_dw_pci_probe()
235 		return -ENOMEM;  in i2c_dw_pci_probe()
241 	dev->get_clk_rate_khz = controller->get_clk_rate_khz;  in i2c_dw_pci_probe()
242 	dev->base = pcim_iomap_table(pdev)[0];  in i2c_dw_pci_probe()
243 	dev->dev = device;  in i2c_dw_pci_probe()
244 	dev->irq = pci_irq_vector(pdev, 0);  in i2c_dw_pci_probe()
245 	dev->flags |= controller->flags;  in i2c_dw_pci_probe()
249 	if (controller->setup) {  in i2c_dw_pci_probe()
250 		r = controller->setup(pdev, controller);  in i2c_dw_pci_probe()
261 	if (controller->scl_sda_cfg) {  in i2c_dw_pci_probe()
262 		cfg = controller->scl_sda_cfg;  in i2c_dw_pci_probe()
263 		dev->ss_hcnt = cfg->ss_hcnt;  in i2c_dw_pci_probe()
264 		dev->fs_hcnt = cfg->fs_hcnt;  in i2c_dw_pci_probe()
265 		dev->ss_lcnt = cfg->ss_lcnt;  in i2c_dw_pci_probe()
266 		dev->fs_lcnt = cfg->fs_lcnt;  in i2c_dw_pci_probe()
267 		dev->sda_hold_time = cfg->sda_hold_time;  in i2c_dw_pci_probe()
270 	adap = &dev->adapter;  in i2c_dw_pci_probe()
271 	adap->owner = THIS_MODULE;  in i2c_dw_pci_probe()
272 	adap->class = 0;  in i2c_dw_pci_probe()
273 	adap->nr = controller->bus_num;  in i2c_dw_pci_probe()
279 	if ((dev->flags & MODEL_MASK) == MODEL_AMD_NAVI_GPU) {  in i2c_dw_pci_probe()
280 		dev->slave = i2c_new_ccgx_ucsi(&dev->adapter, dev->irq, &dgpu_node);  in i2c_dw_pci_probe()
281 		if (IS_ERR(dev->slave))  in i2c_dw_pci_probe()
282 			return dev_err_probe(device, PTR_ERR(dev->slave),  in i2c_dw_pci_probe()
297 	struct device *device = &pdev->dev;  in i2c_dw_pci_remove()
304 	i2c_del_adapter(&dev->adapter);  in i2c_dw_pci_remove()
337 	/* Elkhart Lake (PSE I2C) */
369 MODULE_DESCRIPTION("Synopsys DesignWare PCI I2C bus adapter");