// SPDX-License-Identifier: GPL-1.0+ /* * OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> * (C) Copyright 2000-2005 David Brownell * (C) Copyright 2002 Hewlett-Packard Company * * OMAP Bus Glue * * Modified for OMAP by Tony Lindgren <tony@atomide.com> * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc. * and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com> * * This file is licenced under the GPL. */ #include <linux/clk.h> #include <linux/dma-mapping.h> #include <linux/err.h> #include <linux/gpio.h> #include <linux/io.h> #include <linux/jiffies.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/usb/otg.h> #include <linux/platform_device.h> #include <linux/signal.h> #include <linux/usb.h> #include <linux/usb/hcd.h> #include "ohci.h" #include <asm/io.h> #include <asm/mach-types.h> #include <mach/mux.h> #include <mach/hardware.h> #include <mach/usb.h> /* OMAP-1510 OHCI has its own MMU for DMA */ #define OMAP1510_LB_MEMSIZE 32 /* Should be same as SDRAM size */ #define OMAP1510_LB_CLOCK_DIV 0xfffec10c #define OMAP1510_LB_MMU_CTL 0xfffec208 #define OMAP1510_LB_MMU_LCK 0xfffec224 #define OMAP1510_LB_MMU_LD_TLB 0xfffec228 #define OMAP1510_LB_MMU_CAM_H 0xfffec22c #define OMAP1510_LB_MMU_CAM_L 0xfffec230 #define OMAP1510_LB_MMU_RAM_H 0xfffec234 #define OMAP1510_LB_MMU_RAM_L 0xfffec238 #define DRIVER_DESC "OHCI OMAP driver" #ifdef CONFIG_TPS65010 #include <linux/mfd/tps65010.h> #else #define LOW 0 #define HIGH 1 #define GPIO1 1 static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) { return 0; } #endif static struct clk *usb_host_ck; static struct clk *usb_dc_ck; static const char hcd_name[] = "ohci-omap"; static struct hc_driver __read_mostly ohci_omap_hc_driver; static void omap_ohci_clock_power(int on) { if (on) { clk_enable(usb_dc_ck); clk_enable(usb_host_ck); /* guesstimate for T5 == 1x 32K clock + APLL lock time */ udelay(100); } else { clk_disable(usb_host_ck); clk_disable(usb_dc_ck); } } /* * Board specific gang-switched transceiver power on/off. * NOTE: OSK supplies power from DC, not battery. */ static int omap_ohci_transceiver_power(int on) { if (on) { if (machine_is_omap_innovator() && cpu_is_omap1510()) __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL) | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)), INNOVATOR_FPGA_CAM_USB_CONTROL); else if (machine_is_omap_osk()) tps65010_set_gpio_out_value(GPIO1, LOW); } else { if (machine_is_omap_innovator() && cpu_is_omap1510()) __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL) & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)), INNOVATOR_FPGA_CAM_USB_CONTROL); else if (machine_is_omap_osk()) tps65010_set_gpio_out_value(GPIO1, HIGH); } return 0; } #ifdef CONFIG_ARCH_OMAP15XX /* * OMAP-1510 specific Local Bus clock on/off */ static int omap_1510_local_bus_power(int on) { if (on) { omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL); udelay(200); } else { omap_writel(0, OMAP1510_LB_MMU_CTL); } return 0; } /* * OMAP-1510 specific Local Bus initialization * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE. * See also arch/mach-omap/memory.h for __virt_to_dma() and * __dma_to_virt() which need to match with the physical * Local Bus address below. */ static int omap_1510_local_bus_init(void) { unsigned int tlb; unsigned long lbaddr, physaddr; omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4, OMAP1510_LB_CLOCK_DIV); /* Configure the Local Bus MMU table */ for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) { lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET; physaddr = tlb * 0x00100000 + PHYS_OFFSET; omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H); omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc, OMAP1510_LB_MMU_CAM_L); omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H); omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L); omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK); omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB); } /* Enable the walking table */ omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL); udelay(200); return 0; } #else #define omap_1510_local_bus_power(x) {} #define omap_1510_local_bus_init() {} #endif #ifdef CONFIG_USB_OTG static void start_hnp(struct ohci_hcd *ohci) { struct usb_hcd *hcd = ohci_to_hcd(ohci); const unsigned port = hcd->self.otg_port - 1; unsigned long flags; u32 l; otg_start_hnp(hcd->usb_phy->otg); local_irq_save(flags); hcd->usb_phy->otg->state = OTG_STATE_A_SUSPEND; writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]); l = omap_readl(OTG_CTRL); l &= ~OTG_A_BUSREQ; omap_writel(l, OTG_CTRL); local_irq_restore(flags); } #endif /*-------------------------------------------------------------------------*/ static int ohci_omap_reset(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci(hcd); struct omap_usb_config *config = dev_get_platdata(hcd->self.controller); int need_transceiver = (config->otg != 0); int ret; dev_dbg(hcd->self.controller, "starting USB Controller\n"); if (config->otg) { hcd->self.otg_port = config->otg; /* default/minimum OTG power budget: 8 mA */ hcd->power_budget = 8; } /* boards can use OTG transceivers in non-OTG modes */ need_transceiver = need_transceiver || machine_is_omap_h2() || machine_is_omap_h3(); /* XXX OMAP16xx only */ if (config->ocpi_enable) config->ocpi_enable(); #ifdef CONFIG_USB_OTG if (need_transceiver) { hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2); if (!IS_ERR_OR_NULL(hcd->usb_phy)) { int status = otg_set_host(hcd->usb_phy->otg, &ohci_to_hcd(ohci)->self); dev_dbg(hcd->self.controller, "init %s phy, status %d\n", hcd->usb_phy->label, status); if (status) { usb_put_phy(hcd->usb_phy); return status; } } else { return -EPROBE_DEFER; } hcd->skip_phy_initialization = 1; ohci->start_hnp = start_hnp; } #endif omap_ohci_clock_power(1); if (cpu_is_omap15xx()) { omap_1510_local_bus_power(1); omap_1510_local_bus_init(); } ret = ohci_setup(hcd); if (ret < 0) return ret; if (config->otg || config->rwc) { ohci->hc_control = OHCI_CTRL_RWC; writel(OHCI_CTRL_RWC, &ohci->regs->control); } /* board-specific power switching and overcurrent support */ if (machine_is_omap_osk() || machine_is_omap_innovator()) { u32 rh = roothub_a (ohci); /* power switching (ganged by default) */ rh &= ~RH_A_NPS; /* TPS2045 switch for internal transceiver (port 1) */ if (machine_is_omap_osk()) { ohci_to_hcd(ohci)->power_budget = 250; rh &= ~RH_A_NOCP; /* gpio9 for overcurrent detction */ omap_cfg_reg(W8_1610_GPIO9); gpio_request(9, "OHCI overcurrent"); gpio_direction_input(9); /* for paranoia's sake: disable USB.PUEN */ omap_cfg_reg(W4_USB_HIGHZ); } ohci_writel(ohci, rh, &ohci->regs->roothub.a); ohci->flags &= ~OHCI_QUIRK_HUB_POWER; } else if (machine_is_nokia770()) { /* We require a self-powered hub, which should have * plenty of power. */ ohci_to_hcd(ohci)->power_budget = 0; } /* FIXME hub_wq hub requests should manage power switching */ omap_ohci_transceiver_power(1); /* board init will have already handled HMC and mux setup. * any external transceiver should already be initialized * too, so all configured ports use the right signaling now. */ return 0; } /*-------------------------------------------------------------------------*/ /** * ohci_hcd_omap_probe - initialize OMAP-based HCDs * Context: !in_interrupt() * * Allocates basic resources for this USB host controller, and * then invokes the start() method for the HCD associated with it * through the hotplug entry's driver_data. */ static int ohci_hcd_omap_probe(struct platform_device *pdev) { int retval, irq; struct usb_hcd *hcd = 0; if (pdev->num_resources != 2) { dev_err(&pdev->dev, "invalid num_resources: %i\n", pdev->num_resources); return -ENODEV; } if (pdev->resource[0].flags != IORESOURCE_MEM || pdev->resource[1].flags != IORESOURCE_IRQ) { dev_err(&pdev->dev, "invalid resource type\n"); return -ENODEV; } usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck"); if (IS_ERR(usb_host_ck)) return PTR_ERR(usb_host_ck); if (!cpu_is_omap15xx()) usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck"); else usb_dc_ck = clk_get(&pdev->dev, "lb_ck"); if (IS_ERR(usb_dc_ck)) { clk_put(usb_host_ck); return PTR_ERR(usb_dc_ck); } hcd = usb_create_hcd(&ohci_omap_hc_driver, &pdev->dev, dev_name(&pdev->dev)); if (!hcd) { retval = -ENOMEM; goto err0; } hcd->rsrc_start = pdev->resource[0].start; hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { dev_dbg(&pdev->dev, "request_mem_region failed\n"); retval = -EBUSY; goto err1; } hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { dev_err(&pdev->dev, "can't ioremap OHCI HCD\n"); retval = -ENOMEM; goto err2; } irq = platform_get_irq(pdev, 0); if (irq < 0) { retval = -ENXIO; goto err3; } retval = usb_add_hcd(hcd, irq, 0); if (retval) goto err3; device_wakeup_enable(hcd->self.controller); return 0; err3: iounmap(hcd->regs); err2: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err1: usb_put_hcd(hcd); err0: clk_put(usb_dc_ck); clk_put(usb_host_ck); return retval; } /* may be called with controller, bus, and devices active */ /** * ohci_hcd_omap_remove - shutdown processing for OMAP-based HCDs * @dev: USB Host Controller being removed * Context: !in_interrupt() * * Reverses the effect of ohci_hcd_omap_probe(), first invoking * the HCD's stop() method. It is always called from a thread * context, normally "rmmod", "apmd", or something similar. */ static int ohci_hcd_omap_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); dev_dbg(hcd->self.controller, "stopping USB Controller\n"); usb_remove_hcd(hcd); omap_ohci_clock_power(0); if (!IS_ERR_OR_NULL(hcd->usb_phy)) { (void) otg_set_host(hcd->usb_phy->otg, 0); usb_put_phy(hcd->usb_phy); } if (machine_is_omap_osk()) gpio_free(9); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); clk_put(usb_dc_ck); clk_put(usb_host_ck); return 0; } /*-------------------------------------------------------------------------*/ #ifdef CONFIG_PM static int ohci_omap_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; omap_ohci_clock_power(0); return ret; } static int ohci_omap_resume(struct platform_device *dev) { struct usb_hcd *hcd = platform_get_drvdata(dev); struct ohci_hcd *ohci = hcd_to_ohci(hcd); if (time_before(jiffies, ohci->next_statechange)) msleep(5); ohci->next_statechange = jiffies; omap_ohci_clock_power(1); ohci_resume(hcd, false); return 0; } #endif /*-------------------------------------------------------------------------*/ /* * Driver definition to register with the OMAP bus */ static struct platform_driver ohci_hcd_omap_driver = { .probe = ohci_hcd_omap_probe, .remove = ohci_hcd_omap_remove, .shutdown = usb_hcd_platform_shutdown, #ifdef CONFIG_PM .suspend = ohci_omap_suspend, .resume = ohci_omap_resume, #endif .driver = { .name = "ohci", }, }; static const struct ohci_driver_overrides omap_overrides __initconst = { .product_desc = "OMAP OHCI", .reset = ohci_omap_reset }; static int __init ohci_omap_init(void) { if (usb_disabled()) return -ENODEV; pr_info("%s: " DRIVER_DESC "\n", hcd_name); ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides); return platform_driver_register(&ohci_hcd_omap_driver); } module_init(ohci_omap_init); static void __exit ohci_omap_cleanup(void) { platform_driver_unregister(&ohci_hcd_omap_driver); } module_exit(ohci_omap_cleanup); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_ALIAS("platform:ohci"); MODULE_LICENSE("GPL");