340 lines
8.7 KiB
C
340 lines
8.7 KiB
C
/*
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* Setup platform devices needed by the Freescale multi-port host
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* and/or dual-role USB controller modules based on the description
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* in flat device tree.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/fsl_devices.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/of_platform.h>
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#include <linux/clk.h>
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#include <linux/module.h>
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struct fsl_usb2_dev_data {
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char *dr_mode; /* controller mode */
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char *drivers[3]; /* drivers to instantiate for this mode */
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enum fsl_usb2_operating_modes op_mode; /* operating mode */
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};
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static struct fsl_usb2_dev_data dr_mode_data[] = {
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{
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.dr_mode = "host",
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.drivers = { "fsl-ehci", NULL, NULL, },
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.op_mode = FSL_USB2_DR_HOST,
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},
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{
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.dr_mode = "otg",
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.drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", },
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.op_mode = FSL_USB2_DR_OTG,
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},
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{
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.dr_mode = "peripheral",
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.drivers = { "fsl-usb2-udc", NULL, NULL, },
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.op_mode = FSL_USB2_DR_DEVICE,
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},
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};
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static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
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{
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const unsigned char *prop;
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int i;
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prop = of_get_property(np, "dr_mode", NULL);
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if (prop) {
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for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) {
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if (!strcmp(prop, dr_mode_data[i].dr_mode))
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return &dr_mode_data[i];
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}
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}
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pr_warn("%s: Invalid 'dr_mode' property, fallback to host mode\n",
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np->full_name);
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return &dr_mode_data[0]; /* mode not specified, use host */
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}
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static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
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{
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if (!phy_type)
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return FSL_USB2_PHY_NONE;
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if (!strcasecmp(phy_type, "ulpi"))
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return FSL_USB2_PHY_ULPI;
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if (!strcasecmp(phy_type, "utmi"))
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return FSL_USB2_PHY_UTMI;
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if (!strcasecmp(phy_type, "utmi_wide"))
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return FSL_USB2_PHY_UTMI_WIDE;
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if (!strcasecmp(phy_type, "serial"))
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return FSL_USB2_PHY_SERIAL;
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return FSL_USB2_PHY_NONE;
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}
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static struct platform_device *fsl_usb2_device_register(
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struct platform_device *ofdev,
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struct fsl_usb2_platform_data *pdata,
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const char *name, int id)
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{
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struct platform_device *pdev;
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const struct resource *res = ofdev->resource;
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unsigned int num = ofdev->num_resources;
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int retval;
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pdev = platform_device_alloc(name, id);
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if (!pdev) {
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retval = -ENOMEM;
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goto error;
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}
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pdev->dev.parent = &ofdev->dev;
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pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask;
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*pdev->dev.dma_mask = *ofdev->dev.dma_mask;
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retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
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if (retval)
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goto error;
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if (num) {
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retval = platform_device_add_resources(pdev, res, num);
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if (retval)
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goto error;
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}
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retval = platform_device_add(pdev);
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if (retval)
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goto error;
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return pdev;
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error:
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platform_device_put(pdev);
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return ERR_PTR(retval);
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}
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static const struct of_device_id fsl_usb2_mph_dr_of_match[];
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static int usb_get_ver_info(struct device_node *np)
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{
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int ver = -1;
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/*
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* returns 1 for usb controller version 1.6
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* returns 2 for usb controller version 2.2
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* returns 0 otherwise
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*/
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if (of_device_is_compatible(np, "fsl-usb2-dr")) {
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if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
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ver = FSL_USB_VER_1_6;
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else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
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ver = FSL_USB_VER_2_2;
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else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4"))
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ver = FSL_USB_VER_2_4;
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else /* for previous controller versions */
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ver = FSL_USB_VER_OLD;
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if (ver > -1)
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return ver;
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}
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if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr"))
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return FSL_USB_VER_OLD;
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if (of_device_is_compatible(np, "fsl-usb2-mph")) {
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if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
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ver = FSL_USB_VER_1_6;
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else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
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ver = FSL_USB_VER_2_2;
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else /* for previous controller versions */
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ver = FSL_USB_VER_OLD;
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}
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return ver;
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}
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static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
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{
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struct device_node *np = ofdev->dev.of_node;
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struct platform_device *usb_dev;
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struct fsl_usb2_platform_data data, *pdata;
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struct fsl_usb2_dev_data *dev_data;
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const struct of_device_id *match;
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const unsigned char *prop;
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static unsigned int idx;
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int i;
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if (!of_device_is_available(np))
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return -ENODEV;
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match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
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if (!match)
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return -ENODEV;
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pdata = &data;
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if (match->data)
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memcpy(pdata, match->data, sizeof(data));
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else
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memset(pdata, 0, sizeof(data));
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dev_data = get_dr_mode_data(np);
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if (of_device_is_compatible(np, "fsl-usb2-mph")) {
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if (of_get_property(np, "port0", NULL))
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pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
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if (of_get_property(np, "port1", NULL))
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pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
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pdata->operating_mode = FSL_USB2_MPH_HOST;
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} else {
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if (of_get_property(np, "fsl,invert-drvvbus", NULL))
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pdata->invert_drvvbus = 1;
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if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
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pdata->invert_pwr_fault = 1;
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/* setup mode selected in the device tree */
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pdata->operating_mode = dev_data->op_mode;
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}
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prop = of_get_property(np, "phy_type", NULL);
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pdata->phy_mode = determine_usb_phy(prop);
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pdata->controller_ver = usb_get_ver_info(np);
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if (pdata->have_sysif_regs) {
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if (pdata->controller_ver < 0) {
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dev_warn(&ofdev->dev, "Could not get controller version\n");
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return -ENODEV;
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}
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}
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for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
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if (!dev_data->drivers[i])
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continue;
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usb_dev = fsl_usb2_device_register(ofdev, pdata,
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dev_data->drivers[i], idx);
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if (IS_ERR(usb_dev)) {
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dev_err(&ofdev->dev, "Can't register usb device\n");
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return PTR_ERR(usb_dev);
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}
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}
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idx++;
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return 0;
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}
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static int __unregister_subdev(struct device *dev, void *d)
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{
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platform_device_unregister(to_platform_device(dev));
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return 0;
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}
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static int fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
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{
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device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
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return 0;
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}
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#ifdef CONFIG_PPC_MPC512x
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#define USBGENCTRL 0x200 /* NOTE: big endian */
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#define GC_WU_INT_CLR (1 << 5) /* Wakeup int clear */
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#define GC_ULPI_SEL (1 << 4) /* ULPI i/f select (usb0 only)*/
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#define GC_PPP (1 << 3) /* Inv. Port Power Polarity */
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#define GC_PFP (1 << 2) /* Inv. Power Fault Polarity */
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#define GC_WU_ULPI_EN (1 << 1) /* Wakeup on ULPI event */
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#define GC_WU_IE (1 << 1) /* Wakeup interrupt enable */
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#define ISIPHYCTRL 0x204 /* NOTE: big endian */
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#define PHYCTRL_PHYE (1 << 4) /* On-chip UTMI PHY enable */
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#define PHYCTRL_BSENH (1 << 3) /* Bit Stuff Enable High */
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#define PHYCTRL_BSEN (1 << 2) /* Bit Stuff Enable */
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#define PHYCTRL_LSFE (1 << 1) /* Line State Filter Enable */
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#define PHYCTRL_PXE (1 << 0) /* PHY oscillator enable */
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int fsl_usb2_mpc5121_init(struct platform_device *pdev)
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{
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struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
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struct clk *clk;
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int err;
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clk = devm_clk_get(pdev->dev.parent, "ipg");
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if (IS_ERR(clk)) {
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dev_err(&pdev->dev, "failed to get clk\n");
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return PTR_ERR(clk);
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}
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err = clk_prepare_enable(clk);
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if (err) {
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dev_err(&pdev->dev, "failed to enable clk\n");
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return err;
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}
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pdata->clk = clk;
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if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
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u32 reg = 0;
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if (pdata->invert_drvvbus)
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reg |= GC_PPP;
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if (pdata->invert_pwr_fault)
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reg |= GC_PFP;
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out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
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out_be32(pdata->regs + USBGENCTRL, reg);
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}
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return 0;
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}
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static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
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{
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struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
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pdata->regs = NULL;
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if (pdata->clk)
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clk_disable_unprepare(pdata->clk);
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}
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static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
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.big_endian_desc = 1,
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.big_endian_mmio = 1,
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.es = 1,
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.have_sysif_regs = 0,
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.le_setup_buf = 1,
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.init = fsl_usb2_mpc5121_init,
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.exit = fsl_usb2_mpc5121_exit,
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};
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#endif /* CONFIG_PPC_MPC512x */
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static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
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.have_sysif_regs = 1,
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};
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static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
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{ .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
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{ .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
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#ifdef CONFIG_PPC_MPC512x
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{ .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
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#endif
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{},
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};
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static struct platform_driver fsl_usb2_mph_dr_driver = {
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.driver = {
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.name = "fsl-usb2-mph-dr",
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.of_match_table = fsl_usb2_mph_dr_of_match,
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},
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.probe = fsl_usb2_mph_dr_of_probe,
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.remove = fsl_usb2_mph_dr_of_remove,
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};
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module_platform_driver(fsl_usb2_mph_dr_driver);
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MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
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MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
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MODULE_LICENSE("GPL");
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