diff options
| -rw-r--r-- | drivers/usb/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/usb/host/ehci-hcd.c | 5 | ||||
| -rw-r--r-- | drivers/usb/host/ehci-ls1x.c | 159 |
3 files changed, 165 insertions, 0 deletions
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig index 75823a1abeb6..0b0afc81a542 100644 --- a/drivers/usb/Kconfig +++ b/drivers/usb/Kconfig @@ -76,6 +76,7 @@ config USB_ARCH_HAS_EHCI default y if MICROBLAZE default y if SPARC_LEON default y if ARCH_MMP + default y if MACH_LOONGSON1 default PCI # some non-PCI HCDs implement xHCI diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index a007a9fe0f87..4918b0c59af9 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -1376,6 +1376,11 @@ MODULE_LICENSE ("GPL"); #define PLATFORM_DRIVER ehci_mv_driver #endif +#ifdef CONFIG_MACH_LOONGSON1 +#include "ehci-ls1x.c" +#define PLATFORM_DRIVER ehci_ls1x_driver +#endif + #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \ !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \ !defined(XILINX_OF_PLATFORM_DRIVER) diff --git a/drivers/usb/host/ehci-ls1x.c b/drivers/usb/host/ehci-ls1x.c new file mode 100644 index 000000000000..a283e59709d6 --- /dev/null +++ b/drivers/usb/host/ehci-ls1x.c @@ -0,0 +1,159 @@ +/* + * Bus Glue for Loongson LS1X built-in EHCI controller. + * + * Copyright (c) 2012 Zhang, Keguang <keguang.zhang@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + + +#include <linux/platform_device.h> + +static int ehci_ls1x_reset(struct usb_hcd *hcd) +{ + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + int ret; + + ehci->caps = hcd->regs; + + ret = ehci_setup(hcd); + if (ret) + return ret; + + ehci_port_power(ehci, 0); + + return 0; +} + +static const struct hc_driver ehci_ls1x_hc_driver = { + .description = hcd_name, + .product_desc = "LOONGSON1 EHCI", + .hcd_priv_size = sizeof(struct ehci_hcd), + + /* + * generic hardware linkage + */ + .irq = ehci_irq, + .flags = HCD_MEMORY | HCD_USB2, + + /* + * basic lifecycle operations + */ + .reset = ehci_ls1x_reset, + .start = ehci_run, + .stop = ehci_stop, + .shutdown = ehci_shutdown, + + /* + * managing i/o requests and associated device resources + */ + .urb_enqueue = ehci_urb_enqueue, + .urb_dequeue = ehci_urb_dequeue, + .endpoint_disable = ehci_endpoint_disable, + .endpoint_reset = ehci_endpoint_reset, + + /* + * scheduling support + */ + .get_frame_number = ehci_get_frame, + + /* + * root hub support + */ + .hub_status_data = ehci_hub_status_data, + .hub_control = ehci_hub_control, + .relinquish_port = ehci_relinquish_port, + .port_handed_over = ehci_port_handed_over, + + .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, +}; + +static int ehci_hcd_ls1x_probe(struct platform_device *pdev) +{ + struct usb_hcd *hcd; + struct resource *res; + int irq; + int ret; + + pr_debug("initializing loongson1 ehci USB Controller\n"); + + if (usb_disabled()) + return -ENODEV; + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + dev_err(&pdev->dev, + "Found HC with no IRQ. Check %s setup!\n", + dev_name(&pdev->dev)); + return -ENODEV; + } + irq = res->start; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, + "Found HC with no register addr. Check %s setup!\n", + dev_name(&pdev->dev)); + return -ENODEV; + } + + hcd = usb_create_hcd(&ehci_ls1x_hc_driver, &pdev->dev, + dev_name(&pdev->dev)); + if (!hcd) + return -ENOMEM; + hcd->rsrc_start = res->start; + hcd->rsrc_len = resource_size(res); + + if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { + dev_dbg(&pdev->dev, "controller already in use\n"); + ret = -EBUSY; + goto err_put_hcd; + } + + hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); + if (hcd->regs == NULL) { + dev_dbg(&pdev->dev, "error mapping memory\n"); + ret = -EFAULT; + goto err_release_region; + } + + ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED); + if (ret) + goto err_iounmap; + + return ret; + +err_iounmap: + iounmap(hcd->regs); +err_release_region: + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); +err_put_hcd: + usb_put_hcd(hcd); + return ret; +} + +static int ehci_hcd_ls1x_remove(struct platform_device *pdev) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + + usb_remove_hcd(hcd); + iounmap(hcd->regs); + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + usb_put_hcd(hcd); + + return 0; +} + +static struct platform_driver ehci_ls1x_driver = { + .probe = ehci_hcd_ls1x_probe, + .remove = ehci_hcd_ls1x_remove, + .shutdown = usb_hcd_platform_shutdown, + .driver = { + .name = "ls1x-ehci", + .owner = THIS_MODULE, + }, +}; + +MODULE_ALIAS(PLATFORM_MODULE_PREFIX "ls1x-ehci"); |