/* * OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber * (C) Copyright 2000-2002 David Brownell * (C) Copyright 2002 Hewlett-Packard Company * * Bus Glue for AMD Alchemy Au1xxx * Bus Glue for IKANOS's IKF68XX * * Written by Christopher Hoover * Based on fragments of previous driver by Rusell King et al. * * Modified for LH7A404 from ohci-sa1111.c * by Durgesh Pattamatta * Modified for AMD Alchemy Au1xxx * by Matt Porter * Modified for IKANOS's IKF68XX * by Vivek Dharmadhikari * Modified for IKANOS's IKF71XX * by Kiran Kumar C.S.K * * This file is licenced under the GPL. */ #include #include #include #define USBH_ENABLE_BE (1<<0) #define USBH_ENABLE_C (1<<1) #define USBH_ENABLE_E (1<<2) #define USBH_ENABLE_CE (1<<3) #define USBH_ENABLE_RD (1<<4) #ifdef __LITTLE_ENDIAN #define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C) #elif __BIG_ENDIAN #define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C | USBH_ENABLE_BE) #else #error not byte order defined #endif extern int usb_disabled(void); extern unsigned char fusiv_usb_enable; /* USB PHY Reset sequence, UTMI configuration */ void do_phy_reset (void) { /* * UTMI PHY port 0 & 1 reset, POR and register reset * Enable big-endian for transactions data , INCR4/8/16 xfers, * start on burst boundaries, AP_START_CLOCK is on */ *USB_GNL_REG_1 = 0x2FFFF; udelay(1000); /* Deassert PHY Reset */ *USB_GNL_REG_1 = 0x2FFFE; udelay(1000); /* Deassert POR & port resets */ *USB_GNL_REG_1 = 0x2FFF0; udelay(1000); } //*-------------------------------------------------------------------------*/ static void ikf71xx_start_ohci_hc(struct platform_device *dev) { /* address of Clock Gate Control Register */ volatile int regval = 0; printk(KERN_DEBUG __FILE__ ": starting IKF71XX OHCI USB Host Controller\n"); /* Should not issue reset if EHCI driver has already done it */ if ((fusiv_usb_enable & FUSIV_USB_EHCI_ON) == 0) { printk("VX185 OHCI: Enabling USB clocks and USB PHY reset\n"); /* Enable USB clock */ regval = scu_regs->clk_gate_ctl; if (!(regval & (0x1 << USB_CLK_GATE))) { regval |= (0x1 << USB_CLK_GATE); scu_regs->clk_gate_ctl = regval; } /* Enable USB clock PLL Post Div 3 Register */ regval = scu_regs->pll_pd3_ctl; if (!(regval & (0x1 << USB_CLK_PLL_PDIV3))) { regval |= (0x1 << USB_CLK_PLL_PDIV3); scu_regs->pll_pd3_ctl = regval; } /* Unmask USB reset */ regval = scu_regs->rst_mask; if (regval & (0x1 << USB_RESET)) { regval &= ~(0x1 << USB_RESET); scu_regs->rst_mask = regval; } /* Assert USB reset */ regval = scu_regs->rst_vec; if (!(regval & (0x1 << USB_RESET))) { regval |= (0x1 << USB_RESET); scu_regs->rst_vec = regval; } udelay(1000); /* Mask USB reset back */ regval = scu_regs->rst_mask; if (!(regval & (0x1 << USB_RESET))) { regval |= (0x1 << USB_RESET); scu_regs->rst_mask = regval; } /* UTMI PHY reset */ do_phy_reset(); } printk(KERN_DEBUG __FILE__ ": Clock to USB host has been enabled \n"); } static void ikf71xx_stop_ohci_hc(struct platform_device *dev) { volatile uint regval = 0; pr_debug(__FILE__ ": stopping IKF71XX OHCI USB Controller\n"); if ((fusiv_usb_enable & FUSIV_USB_EHCI_ON) == 0) { /* Disable USB clock PLL Post Div 3 Register */ regval = scu_regs->pll_pd3_ctl; if (regval & (0x1 << USB_CLK_PLL_PDIV3)) { regval &= ~(0x1 << USB_CLK_PLL_PDIV3); scu_regs->pll_pd3_ctl = regval; } /* Disable USB clock */ regval = scu_regs->clk_gate_ctl; if (regval & (0x1 << USB_CLK_GATE)) { regval &= ~(0x1 << USB_CLK_GATE); scu_regs->clk_gate_ctl = regval; } } } /*-------------------------------------------------------------------------*/ /* configure so an HC device and id are always provided */ /* always called with process context; sleeping is OK */ /** * usb_hcd_ikf71xx_ohci_probe - initialize ikf71xx-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. * */ int usb_hcd_ikf71xx_ohci_probe (const struct hc_driver *driver, struct platform_device *dev) { int retval; struct usb_hcd *hcd; struct ohci_hcd *ohci; printk(KERN_DEBUG __FILE__": Probing USB OHCI \n"); /* offset 1 contains IRQ info */ if(dev->resource[1].flags != IORESOURCE_IRQ) { pr_debug ("resource[1] is not IORESOURCE_IRQ"); return -ENOMEM; } hcd = usb_create_hcd(driver, &dev->dev, "ikf71xx ohci"); if (!hcd) return -ENOMEM; /* offset 0 contains OHCI info */ hcd->rsrc_start = dev->resource[0].start; hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { pr_debug("request_mem_region failed"); retval = -EBUSY; goto err1; } hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); if (!hcd->regs) { pr_debug("ioremap failed"); retval = -ENOMEM; goto err2; } ikf71xx_start_ohci_hc(dev); ohci_hcd_init(hcd_to_ohci(hcd)); ohci = hcd_to_ohci(hcd); ohci->flags |= OHCI_QUIRK_FRAME_NO; #if defined (CONFIG_FUSIV_VX185) && defined (CONFIG_CPU_MIPSR2_IRQ_VI) retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_SHARED | IRQF_DISABLED | IRQF_SAMPLE_RANDOM); #else retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED | IRQF_SAMPLE_RANDOM); #endif if (retval == 0) { fusiv_usb_enable |= FUSIV_USB_OHCI_ON; return retval; } ikf71xx_stop_ohci_hc(dev); iounmap(hcd->regs); err2: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); err1: usb_put_hcd(hcd); return retval; } /* may be called without controller electrically present */ /* may be called with controller, bus, and devices active */ /** * usb_hcd_ikf71xx_remove - shutdown processing for ikf71xx-based HCDs * @dev: USB Host Controller being removed * Context: !in_interrupt() * * Reverses the effect of usb_hcd_ikf71xx_ohci_probe(), first invoking * the HCD's stop() method. It is always called from a thread * context, normally "rmmod", "apmd", or something similar. * */ void usb_hcd_ikf71xx_remove (struct usb_hcd *hcd, struct platform_device *dev) { usb_remove_hcd(hcd); pr_debug("stopping IKF71XX USB OHCI Controller\n"); ikf71xx_stop_ohci_hc(dev); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); fusiv_usb_enable &= ~FUSIV_USB_OHCI_ON; } /*-------------------------------------------------------------------------*/ static int __devinit ohci_ikf71xx_start (struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); int ret; ohci_dbg (ohci, "ohci_ikf71xx_start, ohci:%p", ohci); if ((ret = ohci_init (ohci)) < 0) return ret; if ((ret = ohci_run (ohci)) < 0) { err ("can't start %s", hcd->self.bus_name); ohci_stop (hcd); return ret; } return 0; } /*-------------------------------------------------------------------------*/ static const struct hc_driver ohci_ikf71xx_hc_driver = { .description = hcd_name, .product_desc = "Ikanos On-Chip OHCI Host Controller", .hcd_priv_size = sizeof(struct ohci_hcd), /* * generic hardware linkage */ .irq = ohci_irq, .flags = HCD_USB11 | HCD_MEMORY, /* * basic lifecycle operations */ .start = ohci_ikf71xx_start, #ifdef CONFIG_PM .bus_suspend= ohci_bus_suspend, .bus_resume= ohci_bus_resume, #endif /*CONFIG_PM*/ .stop = ohci_stop, /* * managing i/o requests and associated device resources */ .urb_enqueue = ohci_urb_enqueue, .urb_dequeue = ohci_urb_dequeue, .endpoint_disable = ohci_endpoint_disable, /* * scheduling support */ .get_frame_number = ohci_get_frame, /* * root hub support */ .hub_status_data = ohci_hub_status_data, .hub_control = ohci_hub_control, }; /*-------------------------------------------------------------------------*/ static int ohci_hcd_ikf71xx_drv_probe(struct platform_device *pdev) { int ret; pr_debug ("In ohci_hcd_ikf71xx_drv_probe"); if (usb_disabled()) return -ENODEV; ret = usb_hcd_ikf71xx_ohci_probe(&ohci_ikf71xx_hc_driver, pdev); return ret; } static int ohci_hcd_ikf71xx_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); pr_debug ("In ohci_hcd_ikf71xx_drv_remove"); usb_hcd_ikf71xx_remove(hcd, pdev); return 0; } MODULE_ALIAS("fusiv-ohci-hcd"); static struct platform_driver ohci_hcd_ikf71xx_driver = { .probe = ohci_hcd_ikf71xx_drv_probe, .remove = ohci_hcd_ikf71xx_drv_remove, .driver = { .name = "fusiv-ohci-hcd", .bus = &platform_bus_type, .owner = THIS_MODULE, }, };