/* * EHCI 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 Ikanos 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 IKF68XX * by Vivek Dharmadhikari * * This file is licenced under the GPL. */ #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); /*-------------------------------------------------------------------------*/ static void ikf68xx_start_ehci_hc(struct platform_device *dev) { /* address of Clock Gate Control Register */ int *clock_gate_control_reg = (int *)0xb90000cc; /* address of Frame Length Register */ int *framelen_reg = (int *)0xb9230090; int temp; pr_debug(__FILE__ ": starting IKF68XX EHCI USB Controller\n"); /* == AVM/WK 20081215 == * This register address is reserved on VX180. */ #if 0 /* program DDR register */ *((int *)0xb9180020) = 0x00100060; msleep(5); #endif /* Enable Clock to USB host controller Phy */ *((int *)0xb90000dc) = 0x00000001; msleep(5); /* Reset both USB host controller Phys */ /* == AVM/WK 20090505 == * Value corrected for VX180, avoiding commom block reset. *((int *)0xb90000dc) = 0x00000009; */ *((int *)0xb90000dc) = 0x00000031; msleep(5); /* Release USB host controller Phy reset */ *((int *)0xb90000dc) = 0x00000001; msleep(5); /* Release USB host controller Phy suspend */ *((int *)0xb90000dc) = 0x00000007; msleep(5); *clock_gate_control_reg |= (1 << 13); pr_debug(__FILE__ ": Clock to USB host has been enabled \n"); /*================================= * 29th bit-->usb2_desc_endian_conv * 30th bit-->usb2_data_endian_conv * 31st bit--> usb2_csr_endian_conv *================================= */ temp = *((int *)0xb9000088); temp |= 0x60000000; *((int *)0xb9000088) = temp; msleep(5); /* turn HC on (run/stop) bit * Refer 2.3.1 section of ehci spec * for each bit explanation * 11th bit = Async schedule enable */ *((int *)0xb9230010) = 0x00080b01; msleep(5); /* program frame length register with value 0x00001d4d */ *framelen_reg = 0x00001d4d; } static void ikf68xx_stop_ehci_hc(struct platform_device *dev) { /* address of Clock Gate Control Register */ /* int *clock_gate_control_reg = (int *)0xb90000cc; */ pr_debug(__FILE__ ": stopping IKF68XX EHCI USB Controller\n"); /* Disable clock */ /* disable USBH_CLK_EN bit in clock gate control register */ /* *clock_gate_control_reg &= ~(1 << 13); */ } /*-------------------------------------------------------------------------*/ /* configure so an HC device and id are always provided */ /* always called with process context; sleeping is OK */ /** * usb_hcd_ikf68xx_probe - initialize Au1xxx-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_ikf68xx_ehci_probe (const struct hc_driver *driver, struct platform_device *dev) { int retval = 0; struct usb_hcd *hcd; struct ehci_hcd *ehci; pr_debug(__FILE__ ": Probing USB EHCI \n"); ikf68xx_start_ehci_hc(dev); /* offset 1 contains IRQ info */ if(dev->resource[1].flags != IORESOURCE_IRQ) { pr_debug ("resource[2] is not IORESOURCE_IRQ"); return -ENOMEM; } hcd = usb_create_hcd(driver, &dev->dev, "ikf68xx ehci"); if (!hcd) return -ENOMEM; /* offset 0 contains EHCI 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; } //ikf68xx_start_ehci_hc(dev); ehci = hcd_to_ehci(hcd); ehci->caps = hcd->regs; ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase)); /* cache this readonly data; minimize chip reads */ ehci->hcs_params = readl(&ehci->caps->hcs_params); retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED | IRQF_SHARED); if (retval == 0) return retval; ikf68xx_stop_ehci_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_au1xxx_remove - shutdown processing for Au1xxx-based HCDs * @dev: USB Host Controller being removed * Context: !in_interrupt() * * Reverses the effect of usb_hcd_ikf68xx_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_ikf68xx_echi_remove (struct usb_hcd *hcd, struct platform_device *dev) { usb_remove_hcd(hcd); pr_debug("stopping IKF68XX EHCI USB Controller\n"); ikf68xx_stop_ehci_hc(dev); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); } /*-------------------------------------------------------------------------*/ static const struct hc_driver ehci_ikf68xx_hc_driver = { .description = hcd_name, .product_desc = "Ikanos On-Chip EHCI Host Controller", .hcd_priv_size = sizeof(struct ehci_hcd), /* * generic hardware linkage */ .irq = ehci_irq, .flags = HCD_MEMORY | HCD_USB2, /* * basic lifecycle operations */ .reset = ehci_init, .start = ehci_run, .stop = ehci_stop, /* * managing i/o requests and associated device resources */ .urb_enqueue = ehci_urb_enqueue, .urb_dequeue = ehci_urb_dequeue, .endpoint_disable = ehci_endpoint_disable, /* * scheduling support */ .get_frame_number = ehci_get_frame, /* * root hub support */ .hub_status_data = ehci_hub_status_data, .hub_control = ehci_hub_control, #ifdef CONFIG_PM .hub_suspend = ehci_hub_suspend, .hub_resume = ehci_hub_resume, #endif }; /*-------------------------------------------------------------------------*/ static int ehci_hcd_ikf68xx_drv_probe(struct platform_device *pdev) { pr_debug("In ehci_hcd_ikf68xx_drv_probe\n"); if (usb_disabled()) return -ENODEV; return usb_hcd_ikf68xx_ehci_probe(&ehci_ikf68xx_hc_driver, pdev); } static int ehci_hcd_ikf68xx_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); pr_debug ("In ehci_hcd_ikf68xx_drv_remove\n"); usb_hcd_ikf68xx_echi_remove(hcd, pdev); return 0; } /*TBD*/ /*static int ehci_hcd_ikf68xx_drv_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct usb_hcd *hcd = dev_get_drvdata(dev); return 0; } static int ehci_hcd_ikf68xx_drv_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct usb_hcd *hcd = dev_get_drvdata(dev); return 0; } */ MODULE_ALIAS("ikf68xx-ehci-hcd"); static struct platform_driver ehci_hcd_ikf68xx_driver = { .probe = ehci_hcd_ikf68xx_drv_probe, .remove = ehci_hcd_ikf68xx_drv_remove, /*.suspend = ehci_hcd_ikf68xx_drv_suspend, */ /*.resume = ehci_hcd_ikf68xx_drv_resume, */ .driver = { .name = "ikf68xx-ehci-hcd", .bus = &platform_bus_type, } };