diff options
Diffstat (limited to 'target/linux/brcm63xx/files/drivers/usb/host/ohci-bcm63xx.c')
| -rw-r--r-- | target/linux/brcm63xx/files/drivers/usb/host/ohci-bcm63xx.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/files/drivers/usb/host/ohci-bcm63xx.c b/target/linux/brcm63xx/files/drivers/usb/host/ohci-bcm63xx.c new file mode 100644 index 000000000..08807d989 --- /dev/null +++ b/target/linux/brcm63xx/files/drivers/usb/host/ohci-bcm63xx.c @@ -0,0 +1,159 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr> + */ + +#include <linux/init.h> +#include <linux/clk.h> +#include <linux/platform_device.h> +#include <bcm63xx_cpu.h> +#include <bcm63xx_regs.h> +#include <bcm63xx_io.h> + +static struct clk *usb_host_clock; + +static int __devinit ohci_bcm63xx_start(struct usb_hcd *hcd) +{ + struct ohci_hcd *ohci = hcd_to_ohci(hcd); + int ret; + + ret = ohci_init(ohci); + if (ret < 0) + return ret; + + /* FIXME: autodetected port 2 is shared with USB slave */ + + ret = ohci_run(ohci); + if (ret < 0) { + err("can't start %s", hcd->self.bus_name); + ohci_stop(hcd); + return ret; + } + return 0; +} + +static const struct hc_driver ohci_bcm63xx_hc_driver = { + .description = hcd_name, + .product_desc = "BCM63XX integrated OHCI controller", + .hcd_priv_size = sizeof(struct ohci_hcd), + + .irq = ohci_irq, + .flags = HCD_USB11 | HCD_MEMORY, + .start = ohci_bcm63xx_start, + .stop = ohci_stop, + .shutdown = ohci_shutdown, + .urb_enqueue = ohci_urb_enqueue, + .urb_dequeue = ohci_urb_dequeue, + .endpoint_disable = ohci_endpoint_disable, + .get_frame_number = ohci_get_frame, + .hub_status_data = ohci_hub_status_data, + .hub_control = ohci_hub_control, + .start_port_reset = ohci_start_port_reset, +}; + +static int __devinit ohci_hcd_bcm63xx_drv_probe(struct platform_device *pdev) +{ + struct resource *res_mem, *res_irq; + struct usb_hcd *hcd; + struct ohci_hcd *ohci; + u32 reg; + int ret; + + res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res_mem || !res_irq) + return -ENODEV; + + if (BCMCPU_IS_6348()) { + struct clk *clk; + /* enable USB host clock */ + clk = clk_get(&pdev->dev, "usbh"); + if (IS_ERR(clk)) + return -ENODEV; + + clk_enable(clk); + usb_host_clock = clk; + bcm_rset_writel(RSET_OHCI_PRIV, 0, OHCI_PRIV_REG); + + } else if (BCMCPU_IS_6358()) { + reg = bcm_rset_readl(RSET_USBH_PRIV, USBH_PRIV_SWAP_REG); + reg &= ~USBH_PRIV_SWAP_OHCI_ENDN_MASK; + reg |= USBH_PRIV_SWAP_OHCI_DATA_MASK; + bcm_rset_writel(RSET_USBH_PRIV, reg, USBH_PRIV_SWAP_REG); + /* don't ask... */ + bcm_rset_writel(RSET_USBH_PRIV, 0x1c0020, USBH_PRIV_TEST_REG); + } else + return 0; + + hcd = usb_create_hcd(&ohci_bcm63xx_hc_driver, &pdev->dev, "bcm63xx"); + if (!hcd) + return -ENOMEM; + hcd->rsrc_start = res_mem->start; + hcd->rsrc_len = res_mem->end - res_mem->start + 1; + + if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { + pr_debug("request_mem_region failed\n"); + ret = -EBUSY; + goto out; + } + + hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); + if (!hcd->regs) { + pr_debug("ioremap failed\n"); + ret = -EIO; + goto out1; + } + + ohci = hcd_to_ohci(hcd); + ohci->flags |= OHCI_QUIRK_BE_MMIO | OHCI_QUIRK_BE_DESC | + OHCI_QUIRK_FRAME_NO; + ohci_hcd_init(ohci); + + ret = usb_add_hcd(hcd, res_irq->start, IRQF_DISABLED); + if (ret) + goto out2; + + platform_set_drvdata(pdev, hcd); + return 0; + +out2: + iounmap(hcd->regs); +out1: + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); +out: + usb_put_hcd(hcd); + return ret; +} + +static int __devexit ohci_hcd_bcm63xx_drv_remove(struct platform_device *pdev) +{ + struct usb_hcd *hcd; + + hcd = platform_get_drvdata(pdev); + usb_remove_hcd(hcd); + iounmap(hcd->regs); + usb_put_hcd(hcd); + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + if (usb_host_clock) { + clk_disable(usb_host_clock); + clk_put(usb_host_clock); + } + platform_set_drvdata(pdev, NULL); + return 0; +} + +static struct platform_driver ohci_hcd_bcm63xx_driver = { + .probe = ohci_hcd_bcm63xx_drv_probe, + .remove = __devexit_p(ohci_hcd_bcm63xx_drv_remove), + .shutdown = usb_hcd_platform_shutdown, + .driver = { + .name = "bcm63xx_ohci", + .owner = THIS_MODULE, + .bus = &platform_bus_type + }, +}; + +MODULE_ALIAS("platform:bcm63xx_ohci"); |