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"
90 	switch (pdev->device) {  in mfld_setup()
92 		c->bus_cfg &= ~DW_IC_CON_SPEED_MASK;  in mfld_setup()
93 		c->bus_cfg |= DW_IC_CON_SPEED_STD;  in mfld_setup()
97 		c->bus_num = pdev->device - 0x817 + 3;  in mfld_setup()
102 		c->bus_num = pdev->device - 0x82C + 0;  in mfld_setup()
105 	return -ENODEV;  in mfld_setup()
111 	 * On Intel Merrifield the user visible i2c busses are enumerated  in mrfld_setup()
116 	switch (PCI_SLOT(pdev->devfn)) {  in mrfld_setup()
118 		c->bus_num = PCI_FUNC(pdev->devfn) + 0 + 1;  in mrfld_setup()
121 		c->bus_num = PCI_FUNC(pdev->devfn) + 4 + 1;  in mrfld_setup()
124 	return -ENODEV;  in mrfld_setup()
129 		.bus_num = -1,
138 		.bus_num = -1,
147 		.bus_num = -1,
155 		.bus_num = -1,
163 		.bus_num = -1,
179 	i_dev->disable(i_dev);  in i2c_dw_pci_suspend()
189 	return i_dev->init(i_dev);  in i2c_dw_pci_resume()
198 	return dev->controller->clk_khz;  in i2c_dw_get_clk_rate_khz()
202 			    const struct pci_device_id *id)  in i2c_dw_pci_probe()  argument
207 	struct dw_pci_controller *controller;  in i2c_dw_pci_probe()  local
210 	if (id->driver_data >= ARRAY_SIZE(dw_pci_controllers)) {  in i2c_dw_pci_probe()
211 		dev_err(&pdev->dev, "%s: invalid driver data %ld\n", __func__,  in i2c_dw_pci_probe()
212 			id->driver_data);  in i2c_dw_pci_probe()
213 		return -EINVAL;  in i2c_dw_pci_probe()
216 	controller = &dw_pci_controllers[id->driver_data];  in i2c_dw_pci_probe()
220 		dev_err(&pdev->dev, "Failed to enable I2C PCI device (%d)\n",  in i2c_dw_pci_probe()
227 		dev_err(&pdev->dev, "I/O memory remapping failed\n");  in i2c_dw_pci_probe()
231 	dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL);  in i2c_dw_pci_probe()
233 		return -ENOMEM;  in i2c_dw_pci_probe()
235 	dev->clk = NULL;  in i2c_dw_pci_probe()
236 	dev->controller = controller;  in i2c_dw_pci_probe()
237 	dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz;  in i2c_dw_pci_probe()
238 	dev->base = pcim_iomap_table(pdev)[0];  in i2c_dw_pci_probe()
239 	dev->dev = &pdev->dev;  in i2c_dw_pci_probe()
240 	dev->irq = pdev->irq;  in i2c_dw_pci_probe()
241 	dev->flags |= controller->flags;  in i2c_dw_pci_probe()
243 	if (controller->setup) {  in i2c_dw_pci_probe()
244 		r = controller->setup(pdev, controller);  in i2c_dw_pci_probe()
249 	dev->functionality = controller->functionality |  in i2c_dw_pci_probe()
252 	dev->master_cfg = controller->bus_cfg;  in i2c_dw_pci_probe()
253 	if (controller->scl_sda_cfg) {  in i2c_dw_pci_probe()
254 		cfg = controller->scl_sda_cfg;  in i2c_dw_pci_probe()
255 		dev->ss_hcnt = cfg->ss_hcnt;  in i2c_dw_pci_probe()
256 		dev->fs_hcnt = cfg->fs_hcnt;  in i2c_dw_pci_probe()
257 		dev->ss_lcnt = cfg->ss_lcnt;  in i2c_dw_pci_probe()
258 		dev->fs_lcnt = cfg->fs_lcnt;  in i2c_dw_pci_probe()
259 		dev->sda_hold_time = cfg->sda_hold;  in i2c_dw_pci_probe()
264 	dev->tx_fifo_depth = controller->tx_fifo_depth;  in i2c_dw_pci_probe()
265 	dev->rx_fifo_depth = controller->rx_fifo_depth;  in i2c_dw_pci_probe()
267 	adap = &dev->adapter;  in i2c_dw_pci_probe()
268 	adap->owner = THIS_MODULE;  in i2c_dw_pci_probe()
269 	adap->class = 0;  in i2c_dw_pci_probe()
270 	ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev));  in i2c_dw_pci_probe()
271 	adap->nr = controller->bus_num;  in i2c_dw_pci_probe()
277 	pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);  in i2c_dw_pci_probe()
278 	pm_runtime_use_autosuspend(&pdev->dev);  in i2c_dw_pci_probe()
279 	pm_runtime_put_autosuspend(&pdev->dev);  in i2c_dw_pci_probe()
280 	pm_runtime_allow(&pdev->dev);  in i2c_dw_pci_probe()
289 	dev->disable(dev);  in i2c_dw_pci_remove()
290 	pm_runtime_forbid(&pdev->dev);  in i2c_dw_pci_remove()
291 	pm_runtime_get_noresume(&pdev->dev);  in i2c_dw_pci_remove()
293 	i2c_del_adapter(&dev->adapter);  in i2c_dw_pci_remove()
297 MODULE_ALIAS("i2c_designware-pci");
346 MODULE_DESCRIPTION("Synopsys DesignWare PCI I2C bus adapter");