| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Sergei Shtylyov | 886 | 38.17% | 1 | 4.00% |
| Axel Haslam | 800 | 34.47% | 6 | 24.00% |
| Manjunath Goudar | 254 | 10.94% | 2 | 8.00% |
| Bartosz Golaszewski | 200 | 8.62% | 5 | 20.00% |
| David Lechner | 127 | 5.47% | 2 | 8.00% |
| Jingoo Han | 20 | 0.86% | 2 | 8.00% |
| Varka Bhadram | 17 | 0.73% | 1 | 4.00% |
| Peter Chen | 9 | 0.39% | 1 | 4.00% |
| Jan Lübbe | 4 | 0.17% | 1 | 4.00% |
| Greg Kroah-Hartman | 2 | 0.09% | 2 | 8.00% |
| Yong Zhang | 1 | 0.04% | 1 | 4.00% |
| Arnd Bergmann | 1 | 0.04% | 1 | 4.00% |
| Total | 2321 | 25 |
// SPDX-License-Identifier: GPL-2.0 /* * OHCI HCD (Host Controller Driver) for USB. * * TI DA8xx (OMAP-L1x) Bus Glue * * Derived from: ohci-omap.c and ohci-s3c2410.c * Copyright (C) 2008-2009 MontaVista Software, Inc. <source@mvista.com> */ #include <linux/clk.h> #include <linux/gpio/consumer.h> #include <linux/io.h> #include <linux/interrupt.h> #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/phy/phy.h> #include <linux/platform_data/usb-davinci.h> #include <linux/regulator/consumer.h> #include <linux/usb.h> #include <linux/usb/hcd.h> #include <asm/unaligned.h> #include "ohci.h" #define DRIVER_DESC "DA8XX" #define DRV_NAME "ohci-da8xx" static struct hc_driver __read_mostly ohci_da8xx_hc_driver; static int (*orig_ohci_hub_control)(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength); static int (*orig_ohci_hub_status_data)(struct usb_hcd *hcd, char *buf); struct da8xx_ohci_hcd { struct usb_hcd *hcd; struct clk *usb11_clk; struct phy *usb11_phy; struct regulator *vbus_reg; struct notifier_block nb; struct gpio_desc *oc_gpio; }; #define to_da8xx_ohci(hcd) (struct da8xx_ohci_hcd *)(hcd_to_ohci(hcd)->priv) /* Over-current indicator change bitmask */ static volatile u16 ocic_mask; static int ohci_da8xx_enable(struct usb_hcd *hcd) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); int ret; ret = clk_prepare_enable(da8xx_ohci->usb11_clk); if (ret) return ret; ret = phy_init(da8xx_ohci->usb11_phy); if (ret) goto err_phy_init; ret = phy_power_on(da8xx_ohci->usb11_phy); if (ret) goto err_phy_power_on; return 0; err_phy_power_on: phy_exit(da8xx_ohci->usb11_phy); err_phy_init: clk_disable_unprepare(da8xx_ohci->usb11_clk); return ret; } static void ohci_da8xx_disable(struct usb_hcd *hcd) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); phy_power_off(da8xx_ohci->usb11_phy); phy_exit(da8xx_ohci->usb11_phy); clk_disable_unprepare(da8xx_ohci->usb11_clk); } static int ohci_da8xx_set_power(struct usb_hcd *hcd, int on) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); struct device *dev = hcd->self.controller; int ret; if (!da8xx_ohci->vbus_reg) return 0; if (on) { ret = regulator_enable(da8xx_ohci->vbus_reg); if (ret) { dev_err(dev, "Failed to enable regulator: %d\n", ret); return ret; } } else { ret = regulator_disable(da8xx_ohci->vbus_reg); if (ret) { dev_err(dev, "Failed to disable regulator: %d\n", ret); return ret; } } return 0; } static int ohci_da8xx_get_power(struct usb_hcd *hcd) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); if (da8xx_ohci->vbus_reg) return regulator_is_enabled(da8xx_ohci->vbus_reg); return 1; } static int ohci_da8xx_get_oci(struct usb_hcd *hcd) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); unsigned int flags; int ret; if (da8xx_ohci->oc_gpio) return gpiod_get_value_cansleep(da8xx_ohci->oc_gpio); if (!da8xx_ohci->vbus_reg) return 0; ret = regulator_get_error_flags(da8xx_ohci->vbus_reg, &flags); if (ret) return ret; if (flags & REGULATOR_ERROR_OVER_CURRENT) return 1; return 0; } static int ohci_da8xx_has_set_power(struct usb_hcd *hcd) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); if (da8xx_ohci->vbus_reg) return 1; return 0; } static int ohci_da8xx_has_oci(struct usb_hcd *hcd) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); if (da8xx_ohci->oc_gpio) return 1; if (da8xx_ohci->vbus_reg) return 1; return 0; } static int ohci_da8xx_has_potpgt(struct usb_hcd *hcd) { struct device *dev = hcd->self.controller; struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev); if (hub && hub->potpgt) return 1; return 0; } static int ohci_da8xx_regulator_event(struct notifier_block *nb, unsigned long event, void *data) { struct da8xx_ohci_hcd *da8xx_ohci = container_of(nb, struct da8xx_ohci_hcd, nb); if (event & REGULATOR_EVENT_OVER_CURRENT) { ocic_mask |= 1 << 1; ohci_da8xx_set_power(da8xx_ohci->hcd, 0); } return 0; } static irqreturn_t ohci_da8xx_oc_thread(int irq, void *data) { struct da8xx_ohci_hcd *da8xx_ohci = data; struct device *dev = da8xx_ohci->hcd->self.controller; int ret; if (gpiod_get_value_cansleep(da8xx_ohci->oc_gpio) && da8xx_ohci->vbus_reg) { ret = regulator_disable(da8xx_ohci->vbus_reg); if (ret) dev_err(dev, "Failed to disable regulator: %d\n", ret); } return IRQ_HANDLED; } static int ohci_da8xx_register_notify(struct usb_hcd *hcd) { struct da8xx_ohci_hcd *da8xx_ohci = to_da8xx_ohci(hcd); struct device *dev = hcd->self.controller; int ret = 0; if (!da8xx_ohci->oc_gpio && da8xx_ohci->vbus_reg) { da8xx_ohci->nb.notifier_call = ohci_da8xx_regulator_event; ret = devm_regulator_register_notifier(da8xx_ohci->vbus_reg, &da8xx_ohci->nb); } if (ret) dev_err(dev, "Failed to register notifier: %d\n", ret); return ret; } static int ohci_da8xx_reset(struct usb_hcd *hcd) { struct device *dev = hcd->self.controller; struct da8xx_ohci_root_hub *hub = dev_get_platdata(dev); struct ohci_hcd *ohci = hcd_to_ohci(hcd); int result; u32 rh_a; dev_dbg(dev, "starting USB controller\n"); result = ohci_da8xx_enable(hcd); if (result < 0) return result; /* * DA8xx only have 1 port connected to the pins but the HC root hub * register A reports 2 ports, thus we'll have to override it... */ ohci->num_ports = 1; result = ohci_setup(hcd); if (result < 0) { ohci_da8xx_disable(hcd); return result; } /* * Since we're providing a board-specific root hub port power control * and over-current reporting, we have to override the HC root hub A * register's default value, so that ohci_hub_control() could return * the correct hub descriptor... */ rh_a = ohci_readl(ohci, &ohci->regs->roothub.a); if (ohci_da8xx_has_set_power(hcd)) { rh_a &= ~RH_A_NPS; rh_a |= RH_A_PSM; } if (ohci_da8xx_has_oci(hcd)) { rh_a &= ~RH_A_NOCP; rh_a |= RH_A_OCPM; } if (ohci_da8xx_has_potpgt(hcd)) { rh_a &= ~RH_A_POTPGT; rh_a |= hub->potpgt << 24; } ohci_writel(ohci, rh_a, &ohci->regs->roothub.a); return result; } /* * Update the status data from the hub with the over-current indicator change. */ static int ohci_da8xx_hub_status_data(struct usb_hcd *hcd, char *buf) { int length = orig_ohci_hub_status_data(hcd, buf); /* See if we have OCIC bit set on port 1 */ if (ocic_mask & (1 << 1)) { dev_dbg(hcd->self.controller, "over-current indicator change " "on port 1\n"); if (!length) length = 1; buf[0] |= 1 << 1; } return length; } /* * Look at the control requests to the root hub and see if we need to override. */ static int ohci_da8xx_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength) { struct device *dev = hcd->self.controller; int temp; switch (typeReq) { case GetPortStatus: /* Check the port number */ if (wIndex != 1) break; dev_dbg(dev, "GetPortStatus(%u)\n", wIndex); temp = roothub_portstatus(hcd_to_ohci(hcd), wIndex - 1); /* The port power status (PPS) bit defaults to 1 */ if (!ohci_da8xx_get_power(hcd)) temp &= ~RH_PS_PPS; /* The port over-current indicator (POCI) bit is always 0 */ if (ohci_da8xx_get_oci(hcd) > 0) temp |= RH_PS_POCI; /* The over-current indicator change (OCIC) bit is 0 too */ if (ocic_mask & (1 << wIndex)) temp |= RH_PS_OCIC; put_unaligned(cpu_to_le32(temp), (__le32 *)buf); return 0; case SetPortFeature: temp = 1; goto check_port; case ClearPortFeature: temp = 0; check_port: /* Check the port number */ if (wIndex != 1) break; switch (wValue) { case USB_PORT_FEAT_POWER: dev_dbg(dev, "%sPortFeature(%u): %s\n", temp ? "Set" : "Clear", wIndex, "POWER"); return ohci_da8xx_set_power(hcd, temp) ? -EPIPE : 0; case USB_PORT_FEAT_C_OVER_CURRENT: dev_dbg(dev, "%sPortFeature(%u): %s\n", temp ? "Set" : "Clear", wIndex, "C_OVER_CURRENT"); if (temp) ocic_mask |= 1 << wIndex; else ocic_mask &= ~(1 << wIndex); return 0; } } return orig_ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); } /*-------------------------------------------------------------------------*/ #ifdef CONFIG_OF static const struct of_device_id da8xx_ohci_ids[] = { { .compatible = "ti,da830-ohci" }, { } }; MODULE_DEVICE_TABLE(of, da8xx_ohci_ids); #endif static int ohci_da8xx_probe(struct platform_device *pdev) { struct da8xx_ohci_hcd *da8xx_ohci; struct device *dev = &pdev->dev; int error, hcd_irq, oc_irq; struct usb_hcd *hcd; struct resource *mem; hcd = usb_create_hcd(&ohci_da8xx_hc_driver, dev, dev_name(dev)); if (!hcd) return -ENOMEM; da8xx_ohci = to_da8xx_ohci(hcd); da8xx_ohci->hcd = hcd; da8xx_ohci->usb11_clk = devm_clk_get(dev, NULL); if (IS_ERR(da8xx_ohci->usb11_clk)) { error = PTR_ERR(da8xx_ohci->usb11_clk); if (error != -EPROBE_DEFER) dev_err(dev, "Failed to get clock.\n"); goto err; } da8xx_ohci->usb11_phy = devm_phy_get(dev, "usb-phy"); if (IS_ERR(da8xx_ohci->usb11_phy)) { error = PTR_ERR(da8xx_ohci->usb11_phy); if (error != -EPROBE_DEFER) dev_err(dev, "Failed to get phy.\n"); goto err; } da8xx_ohci->vbus_reg = devm_regulator_get_optional(dev, "vbus"); if (IS_ERR(da8xx_ohci->vbus_reg)) { error = PTR_ERR(da8xx_ohci->vbus_reg); if (error == -ENODEV) { da8xx_ohci->vbus_reg = NULL; } else if (error == -EPROBE_DEFER) { goto err; } else { dev_err(dev, "Failed to get regulator\n"); goto err; } } da8xx_ohci->oc_gpio = devm_gpiod_get_optional(dev, "oc", GPIOD_IN); if (IS_ERR(da8xx_ohci->oc_gpio)) goto err; if (da8xx_ohci->oc_gpio) { oc_irq = gpiod_to_irq(da8xx_ohci->oc_gpio); if (oc_irq < 0) goto err; error = devm_request_threaded_irq(dev, oc_irq, NULL, ohci_da8xx_oc_thread, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, "OHCI over-current indicator", da8xx_ohci); if (error) goto err; } mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); hcd->regs = devm_ioremap_resource(dev, mem); if (IS_ERR(hcd->regs)) { error = PTR_ERR(hcd->regs); goto err; } hcd->rsrc_start = mem->start; hcd->rsrc_len = resource_size(mem); hcd_irq = platform_get_irq(pdev, 0); if (hcd_irq < 0) { error = -ENODEV; goto err; } error = usb_add_hcd(hcd, hcd_irq, 0); if (error) goto err; device_wakeup_enable(hcd->self.controller); error = ohci_da8xx_register_notify(hcd); if (error) goto err_remove_hcd; return 0; err_remove_hcd: usb_remove_hcd(hcd); err: usb_put_hcd(hcd); return error; } static int ohci_da8xx_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); usb_remove_hcd(hcd); usb_put_hcd(hcd); return 0; } #ifdef CONFIG_PM static int ohci_da8xx_suspend(struct platform_device *pdev, pm_message_t message) { struct usb_hcd *hcd = platform_get_drvdata(pdev); struct ohci_hcd *ohci = hcd_to_ohci(hcd); bool do_wakeup = device_may_wakeup(&pdev->dev); int ret; if (time_before(jiffies, ohci->next_statechange)) msleep(5); ohci->next_statechange = jiffies; ret = ohci_suspend(hcd, do_wakeup); if (ret) return ret; ohci_da8xx_disable(hcd); hcd->state = HC_STATE_SUSPENDED; return ret; } static int ohci_da8xx_resume(struct platform_device *dev) { struct usb_hcd *hcd = platform_get_drvdata(dev); struct ohci_hcd *ohci = hcd_to_ohci(hcd); int ret; if (time_before(jiffies, ohci->next_statechange)) msleep(5); ohci->next_statechange = jiffies; ret = ohci_da8xx_enable(hcd); if (ret) return ret; ohci_resume(hcd, false); return 0; } #endif static const struct ohci_driver_overrides da8xx_overrides __initconst = { .reset = ohci_da8xx_reset, .extra_priv_size = sizeof(struct da8xx_ohci_hcd), }; /* * Driver definition to register with platform structure. */ static struct platform_driver ohci_hcd_da8xx_driver = { .probe = ohci_da8xx_probe, .remove = ohci_da8xx_remove, .shutdown = usb_hcd_platform_shutdown, #ifdef CONFIG_PM .suspend = ohci_da8xx_suspend, .resume = ohci_da8xx_resume, #endif .driver = { .name = DRV_NAME, .of_match_table = of_match_ptr(da8xx_ohci_ids), }, }; static int __init ohci_da8xx_init(void) { if (usb_disabled()) return -ENODEV; pr_info("%s: " DRIVER_DESC "\n", DRV_NAME); ohci_init_driver(&ohci_da8xx_hc_driver, &da8xx_overrides); /* * The Davinci da8xx HW has some unusual quirks, which require * da8xx-specific workarounds. We override certain hc_driver * functions here to achieve that. We explicitly do not enhance * ohci_driver_overrides to allow this more easily, since this * is an unusual case, and we don't want to encourage others to * override these functions by making it too easy. */ orig_ohci_hub_control = ohci_da8xx_hc_driver.hub_control; orig_ohci_hub_status_data = ohci_da8xx_hc_driver.hub_status_data; ohci_da8xx_hc_driver.hub_status_data = ohci_da8xx_hub_status_data; ohci_da8xx_hc_driver.hub_control = ohci_da8xx_hub_control; return platform_driver_register(&ohci_hcd_da8xx_driver); } module_init(ohci_da8xx_init); static void __exit ohci_da8xx_exit(void) { platform_driver_unregister(&ohci_hcd_da8xx_driver); } module_exit(ohci_da8xx_exit); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:" DRV_NAME);
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