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yaml --- r: 22047 b: refs/heads/master c: 39a269c h: refs/heads/master i: 22045: 81c0143 22043: d33ebf7 22039: 1710e93 22031: e832aa0 22015: 0b2d1d1 v: v3
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Andrew Victor
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Greg Kroah-Hartman
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Mar 20, 2006
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: d0852299381326c5d8eb67771aa98108050e6901 | ||
| refs/heads/master: 39a269c09f854d3d98cbb755b3568175f04efa10 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,306 @@ | ||
| /* | ||
| * OHCI HCD (Host Controller Driver) for USB. | ||
| * | ||
| * Copyright (C) 2004 SAN People (Pty) Ltd. | ||
| * Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org> | ||
| * | ||
| * AT91RM9200 Bus Glue | ||
| * | ||
| * Based on fragments of 2.4 driver by Rick Bronson. | ||
| * Based on ohci-omap.c | ||
| * | ||
| * This file is licenced under the GPL. | ||
| */ | ||
|
|
||
| #include <linux/clk.h> | ||
| #include <linux/platform_device.h> | ||
|
|
||
| #include <asm/mach-types.h> | ||
| #include <asm/hardware.h> | ||
| #include <asm/arch/board.h> | ||
|
|
||
| #ifndef CONFIG_ARCH_AT91RM9200 | ||
| #error "This file is AT91RM9200 bus glue. CONFIG_ARCH_AT91RM9200 must be defined." | ||
| #endif | ||
|
|
||
| /* interface and function clocks */ | ||
| static struct clk *iclk, *fclk; | ||
|
|
||
| extern int usb_disabled(void); | ||
|
|
||
| /*-------------------------------------------------------------------------*/ | ||
|
|
||
| static void at91_start_hc(struct platform_device *pdev) | ||
| { | ||
| struct usb_hcd *hcd = platform_get_drvdata(pdev); | ||
| struct ohci_regs __iomem *regs = hcd->regs; | ||
|
|
||
| dev_dbg(&pdev->dev, "starting AT91RM9200 OHCI USB Controller\n"); | ||
|
|
||
| /* | ||
| * Start the USB clocks. | ||
| */ | ||
| clk_enable(iclk); | ||
| clk_enable(fclk); | ||
|
|
||
| /* | ||
| * The USB host controller must remain in reset. | ||
| */ | ||
| writel(0, ®s->control); | ||
| } | ||
|
|
||
| static void at91_stop_hc(struct platform_device *pdev) | ||
| { | ||
| struct usb_hcd *hcd = platform_get_drvdata(pdev); | ||
| struct ohci_regs __iomem *regs = hcd->regs; | ||
|
|
||
| dev_dbg(&pdev->dev, "stopping AT91RM9200 OHCI USB Controller\n"); | ||
|
|
||
| /* | ||
| * Put the USB host controller into reset. | ||
| */ | ||
| writel(0, ®s->control); | ||
|
|
||
| /* | ||
| * Stop the USB clocks. | ||
| */ | ||
| clk_disable(fclk); | ||
| clk_disable(iclk); | ||
| } | ||
|
|
||
|
|
||
| /*-------------------------------------------------------------------------*/ | ||
|
|
||
| static int usb_hcd_at91_remove (struct usb_hcd *, struct platform_device *); | ||
|
|
||
| /* configure so an HC device and id are always provided */ | ||
| /* always called with process context; sleeping is OK */ | ||
|
|
||
|
|
||
| /** | ||
| * usb_hcd_at91_probe - initialize AT91RM9200-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. | ||
| * | ||
| * Store this function in the HCD's struct pci_driver as probe(). | ||
| */ | ||
| int usb_hcd_at91_probe (const struct hc_driver *driver, struct platform_device *pdev) | ||
| { | ||
| int retval; | ||
| struct usb_hcd *hcd = NULL; | ||
|
|
||
| if (pdev->num_resources != 2) { | ||
| pr_debug("hcd probe: invalid num_resources"); | ||
| return -ENODEV; | ||
| } | ||
|
|
||
| if ((pdev->resource[0].flags != IORESOURCE_MEM) || (pdev->resource[1].flags != IORESOURCE_IRQ)) { | ||
| pr_debug("hcd probe: invalid resource type\n"); | ||
| return -ENODEV; | ||
| } | ||
|
|
||
| hcd = usb_create_hcd(driver, &pdev->dev, "at91rm9200"); | ||
| if (!hcd) | ||
| return -ENOMEM; | ||
| hcd->rsrc_start = pdev->resource[0].start; | ||
| hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; | ||
|
|
||
| if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { | ||
| pr_debug("request_mem_region failed\n"); | ||
| retval = -EBUSY; | ||
| goto err1; | ||
| } | ||
|
|
||
| hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); | ||
| if (!hcd->regs) { | ||
| pr_debug("ioremap failed\n"); | ||
| retval = -EIO; | ||
| goto err2; | ||
| } | ||
|
|
||
| iclk = clk_get(&pdev->dev, "ohci_clk"); | ||
| fclk = clk_get(&pdev->dev, "uhpck"); | ||
|
|
||
| at91_start_hc(pdev); | ||
| ohci_hcd_init(hcd_to_ohci(hcd)); | ||
|
|
||
| retval = usb_add_hcd(hcd, pdev->resource[1].start, SA_INTERRUPT); | ||
| if (retval == 0) | ||
| return retval; | ||
|
|
||
| /* Error handling */ | ||
| at91_stop_hc(pdev); | ||
|
|
||
| clk_put(fclk); | ||
| clk_put(iclk); | ||
|
|
||
| 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_at91_remove - shutdown processing for AT91RM9200-based HCDs | ||
| * @dev: USB Host Controller being removed | ||
| * Context: !in_interrupt() | ||
| * | ||
| * Reverses the effect of usb_hcd_at91_probe(), first invoking | ||
| * the HCD's stop() method. It is always called from a thread | ||
| * context, normally "rmmod", "apmd", or something similar. | ||
| * | ||
| */ | ||
| static int usb_hcd_at91_remove (struct usb_hcd *hcd, struct platform_device *pdev) | ||
| { | ||
| usb_remove_hcd(hcd); | ||
| at91_stop_hc(pdev); | ||
| iounmap(hcd->regs); | ||
| release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | ||
|
|
||
| clk_put(fclk); | ||
| clk_put(iclk); | ||
| fclk = iclk = NULL; | ||
|
|
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| dev_set_drvdata(&pdev->dev, NULL); | ||
| return 0; | ||
| } | ||
|
|
||
| /*-------------------------------------------------------------------------*/ | ||
|
|
||
| static int __devinit | ||
| ohci_at91_start (struct usb_hcd *hcd) | ||
| { | ||
| // struct at91_ohci_data *board = hcd->self.controller->platform_data; | ||
| struct ohci_hcd *ohci = hcd_to_ohci (hcd); | ||
| int ret; | ||
|
|
||
| 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; | ||
| } | ||
| // hcd->self.root_hub->maxchild = board->ports; | ||
| return 0; | ||
| } | ||
|
|
||
| /*-------------------------------------------------------------------------*/ | ||
|
|
||
| static const struct hc_driver ohci_at91_hc_driver = { | ||
| .description = hcd_name, | ||
| .product_desc = "AT91RM9200 OHCI", | ||
| .hcd_priv_size = sizeof(struct ohci_hcd), | ||
|
|
||
| /* | ||
| * generic hardware linkage | ||
| */ | ||
| .irq = ohci_irq, | ||
| .flags = HCD_USB11 | HCD_MEMORY, | ||
|
|
||
| /* | ||
| * basic lifecycle operations | ||
| */ | ||
| .start = ohci_at91_start, | ||
| .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, | ||
|
|
||
| #ifdef CONFIG_PM | ||
| .hub_suspend = ohci_hub_suspend, | ||
| .hub_resume = ohci_hub_resume, | ||
| #endif | ||
| .start_port_reset = ohci_start_port_reset, | ||
| }; | ||
|
|
||
| /*-------------------------------------------------------------------------*/ | ||
|
|
||
| static int ohci_hcd_at91_drv_probe(struct platform_device *dev) | ||
| { | ||
| return usb_hcd_at91_probe(&ohci_at91_hc_driver, dev); | ||
| } | ||
|
|
||
| static int ohci_hcd_at91_drv_remove(struct platform_device *dev) | ||
| { | ||
| return usb_hcd_at91_remove(platform_get_drvdata(dev), dev); | ||
| } | ||
|
|
||
| #ifdef CONFIG_PM | ||
| static int ohci_hcd_at91_drv_suspend(struct platform_device *dev, u32 state, u32 level) | ||
| { | ||
| printk("%s(%s:%d): not implemented yet\n", | ||
| __func__, __FILE__, __LINE__); | ||
|
|
||
| clk_disable(fclk); | ||
|
|
||
| return 0; | ||
| } | ||
|
|
||
| static int ohci_hcd_at91_drv_resume(struct platform_device *dev, u32 state) | ||
| { | ||
| printk("%s(%s:%d): not implemented yet\n", | ||
| __func__, __FILE__, __LINE__); | ||
|
|
||
| clk_enable(fclk); | ||
|
|
||
| return 0; | ||
| } | ||
| #else | ||
| #define ohci_hcd_at91_drv_suspend NULL | ||
| #define ohci_hcd_at91_drv_resume NULL | ||
| #endif | ||
|
|
||
| static struct platform_driver ohci_hcd_at91_driver = { | ||
| .probe = ohci_hcd_at91_drv_probe, | ||
| .remove = ohci_hcd_at91_drv_remove, | ||
| .suspend = ohci_hcd_at91_drv_suspend, | ||
| .resume = ohci_hcd_at91_drv_resume, | ||
| .driver = { | ||
| .name = "at91rm9200-ohci", | ||
| .owner = THIS_MODULE, | ||
| }, | ||
| }; | ||
|
|
||
| static int __init ohci_hcd_at91_init (void) | ||
| { | ||
| if (usb_disabled()) | ||
| return -ENODEV; | ||
|
|
||
| return platform_driver_register(&ohci_hcd_at91_driver); | ||
| } | ||
|
|
||
| static void __exit ohci_hcd_at91_cleanup (void) | ||
| { | ||
| platform_driver_unregister(&ohci_hcd_at91_driver); | ||
| } | ||
|
|
||
| module_init (ohci_hcd_at91_init); | ||
| module_exit (ohci_hcd_at91_cleanup); |
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