diff options
Diffstat (limited to 'drivers/usb/host/ohci-ns9360.c')
| -rw-r--r-- | drivers/usb/host/ohci-ns9360.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-ns9360.c b/drivers/usb/host/ohci-ns9360.c new file mode 100644 index 000000000000..b56e31c8738d --- /dev/null +++ b/drivers/usb/host/ohci-ns9360.c @@ -0,0 +1,263 @@ +/* + * drivers/usb/host/ohci-ns9360.c + * + * based on drivers/usb/host/ohci-sa1111.c which has + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> + * (C) Copyright 2002 Hewlett-Packard Company + * + * Copyright (C) 2008 by Digi International Inc. + * + * All rights reserved. + * + * 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/clk.h> +#include <linux/platform_device.h> + +#define NS9360_UHFE_IEN 0x0c +#define NS9360_UHFE_IEN_OHCIIRQ (1 << 1) +#define NS9360_UHFE_ISTAT 0x10 +#define NS9360_UHFE_ISTAT_OHCIIRQ (1 << 1) + +#define DRIVER_NAME "ns9360-ohci" + +struct ns9360_ohci_device { + struct ohci_hcd ohci; + + struct resource *uhfe; + void __iomem *ioaddr; + struct clk *clk; +}; + +#define hcd2nod(up) ((struct ns9360_ohci_device *)(up->hcd_priv)) + +extern int usb_disabled(void); + +static irqreturn_t usb_hcd_ns9360_hcim_irq(struct usb_hcd *hcd) +{ + u32 stat; + struct ns9360_ohci_device *priv = hcd2nod(hcd); + + /* let OHCI driver handles this */ + irqreturn_t ret = ohci_irq(hcd); + + /* acknowledge interrupt in UHFE */ + stat = ioread32(priv->ioaddr + NS9360_UHFE_ISTAT); + iowrite32(stat, priv->ioaddr + NS9360_UHFE_ISTAT); + + return ret; +} + +static int __devinit ohci_ns9360_start(struct usb_hcd *hcd) +{ + struct ohci_hcd *ohci = hcd_to_ohci(hcd); + int ret; + + ret = ohci_init(ohci); + if (ret < 0) + return ret; + + ret = ohci_run(ohci); + if (ret < 0) { + ohci_err(ohci, "can't start %s", hcd->self.bus_name); + ohci_stop(hcd); + return ret; + } + + return 0; +} + +int usb_hcd_ns9360_probe(const struct hc_driver *driver, + struct platform_device *pdev) +{ + int ret, irq; + struct usb_hcd *hcd; + struct resource *mem; + struct ns9360_ohci_device *priv; + + hcd = usb_create_hcd(driver, &pdev->dev, "ns9360"); + if (!hcd) { + ret = -ENOMEM; + dev_dbg(&pdev->dev, "%s: err_create_hcd\n", __func__); + goto err_create_hcd; + } + priv = hcd2nod(hcd); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + ret = -ENODEV; + dev_dbg(&pdev->dev, "%s: err_get_irq\n", __func__); + goto err_get_irq; + } + + priv->uhfe = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!priv->uhfe) { + ret = -ENODEV; + dev_dbg(&pdev->dev, "%s: err_get_uhfe\n", __func__); + goto err_get_uhfe; + } + + if (!request_mem_region(priv->uhfe->start, + priv->uhfe->end - priv->uhfe->start + 1, + DRIVER_NAME)) { + ret = -ENOMEM; + dev_dbg(&pdev->dev, "%s: err_request_uhfe\n", __func__); + goto err_request_uhfe; + } + + priv->ioaddr = ioremap(priv->uhfe->start, + priv->uhfe->end - priv->uhfe->start + 1); + if (!priv->ioaddr) { + ret = -ENODEV; + dev_dbg(&pdev->dev, "%s: err_map_uhfe\n", __func__); + goto err_map_uhfe; + } + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem) { + ret = -ENODEV; + dev_dbg(&pdev->dev, "%s: err_get_mem\n", __func__); + goto err_get_mem; + } + + hcd->rsrc_start = mem->start; + hcd->rsrc_len = mem->end - mem->start + 1; + + if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { + ret = -ENOMEM; + dev_dbg(&pdev->dev, "%s: err_request_mem\n", __func__); + goto err_request_mem; +} + + hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); + if (!hcd->regs) { + ret = -EIO; + dev_dbg(&pdev->dev, "%s: err_map_mem\n", __func__); + goto err_map_mem; + } + + priv->clk = clk_get(&pdev->dev, DRIVER_NAME); + if (IS_ERR(priv->clk)) { + ret = PTR_ERR(priv->clk); + dev_dbg(&pdev->dev, "%s: err_clk_get\n", __func__); + goto err_clk_get; + } + + ret = clk_enable(priv->clk); + if (ret) { + dev_dbg(&pdev->dev, "%s: err_clk_enable\n", __func__); + goto err_clk_enable; + } + + /* enable irq */ + iowrite32(NS9360_UHFE_IEN_OHCIIRQ, priv->ioaddr + NS9360_UHFE_IEN); + + ohci_hcd_init(hcd_to_ohci(hcd)); + + ret = usb_add_hcd(hcd, irq, IRQF_DISABLED); + if (ret != 0) { + dev_dbg(&pdev->dev, "%s: err_add_hcd\n", __func__); + goto err_add_hcd; + } + + return 0; + +err_add_hcd: + clk_disable(priv->clk); +err_clk_enable: + clk_put(priv->clk); +err_clk_get: + iounmap(hcd->regs); +err_map_mem: + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); +err_request_mem: +err_get_mem: + iounmap(priv->ioaddr); +err_map_uhfe: + release_mem_region(priv->uhfe->start, + priv->uhfe->end - priv->uhfe->start + 1); +err_request_uhfe: +err_get_uhfe: +err_get_irq: + usb_put_hcd(hcd); +err_create_hcd: + return ret; +} + +static int usb_hcd_ns9360_remove(struct usb_hcd *hcd, + struct platform_device *pdev) +{ + struct ns9360_ohci_device *priv = hcd2nod(hcd); + + usb_remove_hcd(hcd); + + clk_disable(priv->clk); + clk_put(priv->clk); + + iounmap(hcd->regs); + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + + iounmap(priv->ioaddr); + release_mem_region(priv->uhfe->start, + priv->uhfe->end - priv->uhfe->start + 1); + + usb_put_hcd(hcd); + + return 0; +} + +static const struct hc_driver ohci_ns9360_hc_driver = { + .description = hcd_name, + .product_desc = "NS9360 OHCI", + .hcd_priv_size = sizeof(struct ns9360_ohci_device), + + /* generic hardware linkage */ + .irq = usb_hcd_ns9360_hcim_irq, + .flags = HCD_USB11 | HCD_MEMORY , + + /* basic lifecycle operations */ + .start = ohci_ns9360_start, + .stop = ohci_stop, + .shutdown = ohci_shutdown, + + /* 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, +#ifdef CONFIG_PM + .bus_suspend = ohci_bus_suspend, + .bus_resume = ohci_bus_resume, +#endif + .start_port_reset = ohci_start_port_reset, +}; + +static int ohci_hcd_ns9360_drv_probe(struct platform_device *dev) +{ + return usb_hcd_ns9360_probe(&ohci_ns9360_hc_driver, dev); +} + +static int ohci_hcd_ns9360_drv_remove(struct platform_device *dev) +{ + return usb_hcd_ns9360_remove(platform_get_drvdata(dev), dev); +} + +static struct platform_driver ohci_hcd_ns9360_driver = { + .probe = ohci_hcd_ns9360_drv_probe, + .remove = ohci_hcd_ns9360_drv_remove, + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + }, +}; + +MODULE_ALIAS("platform:" DRIVER_NAME); |