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Diffstat (limited to 'kernel/drivers/usb/host/fsl-mph-dr-of.c')
-rw-r--r--kernel/drivers/usb/host/fsl-mph-dr-of.c339
1 files changed, 339 insertions, 0 deletions
diff --git a/kernel/drivers/usb/host/fsl-mph-dr-of.c b/kernel/drivers/usb/host/fsl-mph-dr-of.c
new file mode 100644
index 000000000..7e325e90d
--- /dev/null
+++ b/kernel/drivers/usb/host/fsl-mph-dr-of.c
@@ -0,0 +1,339 @@
+/*
+ * Setup platform devices needed by the Freescale multi-port host
+ * and/or dual-role USB controller modules based on the description
+ * in flat device tree.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/fsl_devices.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/of_platform.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+
+struct fsl_usb2_dev_data {
+ char *dr_mode; /* controller mode */
+ char *drivers[3]; /* drivers to instantiate for this mode */
+ enum fsl_usb2_operating_modes op_mode; /* operating mode */
+};
+
+static struct fsl_usb2_dev_data dr_mode_data[] = {
+ {
+ .dr_mode = "host",
+ .drivers = { "fsl-ehci", NULL, NULL, },
+ .op_mode = FSL_USB2_DR_HOST,
+ },
+ {
+ .dr_mode = "otg",
+ .drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", },
+ .op_mode = FSL_USB2_DR_OTG,
+ },
+ {
+ .dr_mode = "peripheral",
+ .drivers = { "fsl-usb2-udc", NULL, NULL, },
+ .op_mode = FSL_USB2_DR_DEVICE,
+ },
+};
+
+static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
+{
+ const unsigned char *prop;
+ int i;
+
+ prop = of_get_property(np, "dr_mode", NULL);
+ if (prop) {
+ for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) {
+ if (!strcmp(prop, dr_mode_data[i].dr_mode))
+ return &dr_mode_data[i];
+ }
+ }
+ pr_warn("%s: Invalid 'dr_mode' property, fallback to host mode\n",
+ np->full_name);
+ return &dr_mode_data[0]; /* mode not specified, use host */
+}
+
+static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
+{
+ if (!phy_type)
+ return FSL_USB2_PHY_NONE;
+ if (!strcasecmp(phy_type, "ulpi"))
+ return FSL_USB2_PHY_ULPI;
+ if (!strcasecmp(phy_type, "utmi"))
+ return FSL_USB2_PHY_UTMI;
+ if (!strcasecmp(phy_type, "utmi_wide"))
+ return FSL_USB2_PHY_UTMI_WIDE;
+ if (!strcasecmp(phy_type, "serial"))
+ return FSL_USB2_PHY_SERIAL;
+
+ return FSL_USB2_PHY_NONE;
+}
+
+static struct platform_device *fsl_usb2_device_register(
+ struct platform_device *ofdev,
+ struct fsl_usb2_platform_data *pdata,
+ const char *name, int id)
+{
+ struct platform_device *pdev;
+ const struct resource *res = ofdev->resource;
+ unsigned int num = ofdev->num_resources;
+ int retval;
+
+ pdev = platform_device_alloc(name, id);
+ if (!pdev) {
+ retval = -ENOMEM;
+ goto error;
+ }
+
+ pdev->dev.parent = &ofdev->dev;
+
+ pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask;
+ *pdev->dev.dma_mask = *ofdev->dev.dma_mask;
+
+ retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
+ if (retval)
+ goto error;
+
+ if (num) {
+ retval = platform_device_add_resources(pdev, res, num);
+ if (retval)
+ goto error;
+ }
+
+ retval = platform_device_add(pdev);
+ if (retval)
+ goto error;
+
+ return pdev;
+
+error:
+ platform_device_put(pdev);
+ return ERR_PTR(retval);
+}
+
+static const struct of_device_id fsl_usb2_mph_dr_of_match[];
+
+static int usb_get_ver_info(struct device_node *np)
+{
+ int ver = -1;
+
+ /*
+ * returns 1 for usb controller version 1.6
+ * returns 2 for usb controller version 2.2
+ * returns 0 otherwise
+ */
+ if (of_device_is_compatible(np, "fsl-usb2-dr")) {
+ if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
+ ver = FSL_USB_VER_1_6;
+ else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
+ ver = FSL_USB_VER_2_2;
+ else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4"))
+ ver = FSL_USB_VER_2_4;
+ else /* for previous controller versions */
+ ver = FSL_USB_VER_OLD;
+
+ if (ver > -1)
+ return ver;
+ }
+
+ if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr"))
+ return FSL_USB_VER_OLD;
+
+ if (of_device_is_compatible(np, "fsl-usb2-mph")) {
+ if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
+ ver = FSL_USB_VER_1_6;
+ else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
+ ver = FSL_USB_VER_2_2;
+ else /* for previous controller versions */
+ ver = FSL_USB_VER_OLD;
+ }
+
+ return ver;
+}
+
+static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
+{
+ struct device_node *np = ofdev->dev.of_node;
+ struct platform_device *usb_dev;
+ struct fsl_usb2_platform_data data, *pdata;
+ struct fsl_usb2_dev_data *dev_data;
+ const struct of_device_id *match;
+ const unsigned char *prop;
+ static unsigned int idx;
+ int i;
+
+ if (!of_device_is_available(np))
+ return -ENODEV;
+
+ match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
+ if (!match)
+ return -ENODEV;
+
+ pdata = &data;
+ if (match->data)
+ memcpy(pdata, match->data, sizeof(data));
+ else
+ memset(pdata, 0, sizeof(data));
+
+ dev_data = get_dr_mode_data(np);
+
+ if (of_device_is_compatible(np, "fsl-usb2-mph")) {
+ if (of_get_property(np, "port0", NULL))
+ pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
+
+ if (of_get_property(np, "port1", NULL))
+ pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
+
+ pdata->operating_mode = FSL_USB2_MPH_HOST;
+ } else {
+ if (of_get_property(np, "fsl,invert-drvvbus", NULL))
+ pdata->invert_drvvbus = 1;
+
+ if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
+ pdata->invert_pwr_fault = 1;
+
+ /* setup mode selected in the device tree */
+ pdata->operating_mode = dev_data->op_mode;
+ }
+
+ prop = of_get_property(np, "phy_type", NULL);
+ pdata->phy_mode = determine_usb_phy(prop);
+ pdata->controller_ver = usb_get_ver_info(np);
+
+ if (pdata->have_sysif_regs) {
+ if (pdata->controller_ver < 0) {
+ dev_warn(&ofdev->dev, "Could not get controller version\n");
+ return -ENODEV;
+ }
+ }
+
+ for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
+ if (!dev_data->drivers[i])
+ continue;
+ usb_dev = fsl_usb2_device_register(ofdev, pdata,
+ dev_data->drivers[i], idx);
+ if (IS_ERR(usb_dev)) {
+ dev_err(&ofdev->dev, "Can't register usb device\n");
+ return PTR_ERR(usb_dev);
+ }
+ }
+ idx++;
+ return 0;
+}
+
+static int __unregister_subdev(struct device *dev, void *d)
+{
+ platform_device_unregister(to_platform_device(dev));
+ return 0;
+}
+
+static int fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
+{
+ device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
+ return 0;
+}
+
+#ifdef CONFIG_PPC_MPC512x
+
+#define USBGENCTRL 0x200 /* NOTE: big endian */
+#define GC_WU_INT_CLR (1 << 5) /* Wakeup int clear */
+#define GC_ULPI_SEL (1 << 4) /* ULPI i/f select (usb0 only)*/
+#define GC_PPP (1 << 3) /* Inv. Port Power Polarity */
+#define GC_PFP (1 << 2) /* Inv. Power Fault Polarity */
+#define GC_WU_ULPI_EN (1 << 1) /* Wakeup on ULPI event */
+#define GC_WU_IE (1 << 1) /* Wakeup interrupt enable */
+
+#define ISIPHYCTRL 0x204 /* NOTE: big endian */
+#define PHYCTRL_PHYE (1 << 4) /* On-chip UTMI PHY enable */
+#define PHYCTRL_BSENH (1 << 3) /* Bit Stuff Enable High */
+#define PHYCTRL_BSEN (1 << 2) /* Bit Stuff Enable */
+#define PHYCTRL_LSFE (1 << 1) /* Line State Filter Enable */
+#define PHYCTRL_PXE (1 << 0) /* PHY oscillator enable */
+
+int fsl_usb2_mpc5121_init(struct platform_device *pdev)
+{
+ struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct clk *clk;
+ int err;
+
+ clk = devm_clk_get(pdev->dev.parent, "ipg");
+ if (IS_ERR(clk)) {
+ dev_err(&pdev->dev, "failed to get clk\n");
+ return PTR_ERR(clk);
+ }
+ err = clk_prepare_enable(clk);
+ if (err) {
+ dev_err(&pdev->dev, "failed to enable clk\n");
+ return err;
+ }
+ pdata->clk = clk;
+
+ if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
+ u32 reg = 0;
+
+ if (pdata->invert_drvvbus)
+ reg |= GC_PPP;
+
+ if (pdata->invert_pwr_fault)
+ reg |= GC_PFP;
+
+ out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
+ out_be32(pdata->regs + USBGENCTRL, reg);
+ }
+ return 0;
+}
+
+static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
+{
+ struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
+
+ pdata->regs = NULL;
+
+ if (pdata->clk)
+ clk_disable_unprepare(pdata->clk);
+}
+
+static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
+ .big_endian_desc = 1,
+ .big_endian_mmio = 1,
+ .es = 1,
+ .have_sysif_regs = 0,
+ .le_setup_buf = 1,
+ .init = fsl_usb2_mpc5121_init,
+ .exit = fsl_usb2_mpc5121_exit,
+};
+#endif /* CONFIG_PPC_MPC512x */
+
+static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
+ .have_sysif_regs = 1,
+};
+
+static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
+ { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
+ { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
+#ifdef CONFIG_PPC_MPC512x
+ { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
+#endif
+ {},
+};
+
+static struct platform_driver fsl_usb2_mph_dr_driver = {
+ .driver = {
+ .name = "fsl-usb2-mph-dr",
+ .of_match_table = fsl_usb2_mph_dr_of_match,
+ },
+ .probe = fsl_usb2_mph_dr_of_probe,
+ .remove = fsl_usb2_mph_dr_of_remove,
+};
+
+module_platform_driver(fsl_usb2_mph_dr_driver);
+
+MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
+MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
+MODULE_LICENSE("GPL");