ehci-au1xxx.c revision c430131a02d677aa708f56342c1565edfdacb3c0
176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse/* 276fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse * EHCI HCD (Host Controller Driver) for USB. 376fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse * 476fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse * Bus Glue for AMD Alchemy Au1xxx 576fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse * 676fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse * Based on "ohci-au1xxx.c" by Matt Porter <mporter@kernel.crashing.org> 776fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse * 876fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse * Modified for AMD Alchemy Au1200 EHC 976fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse * by K.Boge <karsten.boge@amd.com> 1076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse * 1176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse * This file is licenced under the GPL. 1276fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse */ 1376fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 1476fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse#include <linux/platform_device.h> 1576fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse#include <asm/mach-au1x00/au1000.h> 1676fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 1776fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse#define USB_HOST_CONFIG (USB_MSR_BASE + USB_MSR_MCFG) 1876fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse#define USB_MCFG_PFEN (1<<31) 1976fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse#define USB_MCFG_RDCOMB (1<<30) 2076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse#define USB_MCFG_SSDEN (1<<23) 2176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse#define USB_MCFG_PHYPLLEN (1<<19) 2253c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss#define USB_MCFG_UCECLKEN (1<<18) 2376fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse#define USB_MCFG_EHCCLKEN (1<<17) 2453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss#ifdef CONFIG_DMA_COHERENT 2576fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse#define USB_MCFG_UCAM (1<<7) 2653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss#else 2753c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss#define USB_MCFG_UCAM (0) 2853c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss#endif 2976fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse#define USB_MCFG_EBMEN (1<<3) 3076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse#define USB_MCFG_EMEMEN (1<<2) 3176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 3253c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss#define USBH_ENABLE_CE (USB_MCFG_PHYPLLEN | USB_MCFG_EHCCLKEN) 3353c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss#define USBH_ENABLE_INIT (USB_MCFG_PFEN | USB_MCFG_RDCOMB | \ 3453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss USBH_ENABLE_CE | USB_MCFG_SSDEN | \ 3553c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss USB_MCFG_UCAM | USB_MCFG_EBMEN | \ 3653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss USB_MCFG_EMEMEN) 3776fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 3876fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse#define USBH_DISABLE (USB_MCFG_EBMEN | USB_MCFG_EMEMEN) 3976fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 4076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouseextern int usb_disabled(void); 4176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 4253c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Laussstatic void au1xxx_start_ehc(void) 4376fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse{ 4453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss /* enable clock to EHCI block and HS PHY PLL*/ 4553c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss au_writel(au_readl(USB_HOST_CONFIG) | USBH_ENABLE_CE, USB_HOST_CONFIG); 4653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss au_sync(); 4776fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse udelay(1000); 4876fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 4953c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss /* enable EHCI mmio */ 5053c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss au_writel(au_readl(USB_HOST_CONFIG) | USBH_ENABLE_INIT, USB_HOST_CONFIG); 5153c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss au_sync(); 5253c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss udelay(1000); 5376fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse} 5476fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 5553c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Laussstatic void au1xxx_stop_ehc(void) 5676fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse{ 5753c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss unsigned long c; 5876fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 5976fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse /* Disable mem */ 6053c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss au_writel(au_readl(USB_HOST_CONFIG) & ~USBH_DISABLE, USB_HOST_CONFIG); 6153c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss au_sync(); 6276fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse udelay(1000); 6353c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss 6453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss /* Disable EHC clock. If the HS PHY is unused disable it too. */ 6553c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss c = au_readl(USB_HOST_CONFIG) & ~USB_MCFG_EHCCLKEN; 6653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss if (!(c & USB_MCFG_UCECLKEN)) /* UDC disabled? */ 6753c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss c &= ~USB_MCFG_PHYPLLEN; /* yes: disable HS PHY PLL */ 6853c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss au_writel(c, USB_HOST_CONFIG); 6953c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss au_sync(); 7076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse} 7176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 729757de384451a606af8c722213cb973192cbbd1bManuel Laussstatic int au1xxx_ehci_setup(struct usb_hcd *hcd) 739757de384451a606af8c722213cb973192cbbd1bManuel Lauss{ 749757de384451a606af8c722213cb973192cbbd1bManuel Lauss struct ehci_hcd *ehci = hcd_to_ehci(hcd); 759757de384451a606af8c722213cb973192cbbd1bManuel Lauss int ret = ehci_init(hcd); 769757de384451a606af8c722213cb973192cbbd1bManuel Lauss 779757de384451a606af8c722213cb973192cbbd1bManuel Lauss ehci->need_io_watchdog = 0; 789757de384451a606af8c722213cb973192cbbd1bManuel Lauss return ret; 799757de384451a606af8c722213cb973192cbbd1bManuel Lauss} 809757de384451a606af8c722213cb973192cbbd1bManuel Lauss 8153c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Laussstatic const struct hc_driver ehci_au1xxx_hc_driver = { 8253c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .description = hcd_name, 8353c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .product_desc = "Au1xxx EHCI", 8453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .hcd_priv_size = sizeof(struct ehci_hcd), 8576fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 8653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss /* 8753c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss * generic hardware linkage 8853c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss */ 8953c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .irq = ehci_irq, 9053c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .flags = HCD_MEMORY | HCD_USB2, 9176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 9253c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss /* 9353c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss * basic lifecycle operations 9453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss * 9553c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss * FIXME -- ehci_init() doesn't do enough here. 9653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss * See ehci-ppc-soc for a complete implementation. 9753c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss */ 989757de384451a606af8c722213cb973192cbbd1bManuel Lauss .reset = au1xxx_ehci_setup, 9953c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .start = ehci_run, 10053c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .stop = ehci_stop, 10153c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .shutdown = ehci_shutdown, 10253c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss 10353c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss /* 10453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss * managing i/o requests and associated device resources 10553c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss */ 10653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .urb_enqueue = ehci_urb_enqueue, 10753c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .urb_dequeue = ehci_urb_dequeue, 10853c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .endpoint_disable = ehci_endpoint_disable, 109b18ffd49e86102a9ed0a1cc83fdafe3891e844e5Alan Stern .endpoint_reset = ehci_endpoint_reset, 11053c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss 11153c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss /* 11253c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss * scheduling support 11353c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss */ 11453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .get_frame_number = ehci_get_frame, 11553c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss 11653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss /* 11753c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss * root hub support 11853c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss */ 11953c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .hub_status_data = ehci_hub_status_data, 12053c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .hub_control = ehci_hub_control, 12153c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .bus_suspend = ehci_bus_suspend, 12253c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .bus_resume = ehci_bus_resume, 12353c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .relinquish_port = ehci_relinquish_port, 12453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .port_handed_over = ehci_port_handed_over, 125914b701280a76f96890ad63eb0fa99bf204b961cAlan Stern 126914b701280a76f96890ad63eb0fa99bf204b961cAlan Stern .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, 12753c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss}; 12853c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss 12953c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Laussstatic int ehci_hcd_au1xxx_drv_probe(struct platform_device *pdev) 13076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse{ 13176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse struct usb_hcd *hcd; 13276fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse struct ehci_hcd *ehci; 1331f141ca2b1f40088203fba061cc7b1f8da7c38abH Hartley Sweeten struct resource *res; 13453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss int ret; 13576fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 13653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss if (usb_disabled()) 13753c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss return -ENODEV; 13876fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 13953c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss#if defined(CONFIG_SOC_AU1200) && defined(CONFIG_DMA_COHERENT) 14076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse /* Au1200 AB USB does not support coherent memory */ 14176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse if (!(read_c0_prid() & 0xff)) { 14253c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss printk(KERN_INFO "%s: this is chip revision AB!\n", pdev->name); 14353c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss printk(KERN_INFO "%s: update your board or re-configure" 14453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss " the kernel\n", pdev->name); 14576fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse return -ENODEV; 14676fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse } 14776fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse#endif 14876fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 14953c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss if (pdev->resource[1].flags != IORESOURCE_IRQ) { 15076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse pr_debug("resource[1] is not IORESOURCE_IRQ"); 15153c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss return -ENOMEM; 15276fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse } 15353c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss hcd = usb_create_hcd(&ehci_au1xxx_hc_driver, &pdev->dev, "Au1xxx"); 15476fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse if (!hcd) 15576fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse return -ENOMEM; 15653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss 1571f141ca2b1f40088203fba061cc7b1f8da7c38abH Hartley Sweeten res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1581f141ca2b1f40088203fba061cc7b1f8da7c38abH Hartley Sweeten hcd->rsrc_start = res->start; 1591f141ca2b1f40088203fba061cc7b1f8da7c38abH Hartley Sweeten hcd->rsrc_len = resource_size(res); 16076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 16176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 16276fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse pr_debug("request_mem_region failed"); 16353c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss ret = -EBUSY; 16476fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse goto err1; 16576fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse } 16676fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 16776fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); 16876fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse if (!hcd->regs) { 16976fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse pr_debug("ioremap failed"); 17053c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss ret = -ENOMEM; 17176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse goto err2; 17276fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse } 17376fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 17453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss au1xxx_start_ehc(); 17553c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss 17676fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse ehci = hcd_to_ehci(hcd); 17776fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse ehci->caps = hcd->regs; 178c430131a02d677aa708f56342c1565edfdacb3c0Jan Andersson ehci->regs = hcd->regs + 179c430131a02d677aa708f56342c1565edfdacb3c0Jan Andersson HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase)); 18076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse /* cache this readonly data; minimize chip reads */ 18176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse ehci->hcs_params = readl(&ehci->caps->hcs_params); 18276fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 18353c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss ret = usb_add_hcd(hcd, pdev->resource[1].start, 18453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss IRQF_DISABLED | IRQF_SHARED); 18553c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss if (ret == 0) { 18653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss platform_set_drvdata(pdev, hcd); 18753c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss return ret; 18853c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss } 18976fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 19053c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss au1xxx_stop_ehc(); 19176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse iounmap(hcd->regs); 19276fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouseerr2: 19376fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 19476fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouseerr1: 19576fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse usb_put_hcd(hcd); 19653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss return ret; 19776fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse} 19876fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 19953c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Laussstatic int ehci_hcd_au1xxx_drv_remove(struct platform_device *pdev) 20076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse{ 20153c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss struct usb_hcd *hcd = platform_get_drvdata(pdev); 20253c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss 20376fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse usb_remove_hcd(hcd); 20476fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse iounmap(hcd->regs); 20576fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 20676fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse usb_put_hcd(hcd); 20753c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss au1xxx_stop_ehc(); 20853c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss platform_set_drvdata(pdev, NULL); 20976fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 21076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse return 0; 21176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse} 21276fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 21342bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss#ifdef CONFIG_PM 214807fcb5e19877d339a4cc56f2c6ddaf3a147457aManuel Laussstatic int ehci_hcd_au1xxx_drv_suspend(struct device *dev) 21576fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse{ 216807fcb5e19877d339a4cc56f2c6ddaf3a147457aManuel Lauss struct usb_hcd *hcd = dev_get_drvdata(dev); 21742bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss struct ehci_hcd *ehci = hcd_to_ehci(hcd); 21842bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss unsigned long flags; 21942bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss int rc; 22076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 22176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse return 0; 22242bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss rc = 0; 22342bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 22442bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss if (time_before(jiffies, ehci->next_statechange)) 22542bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss msleep(10); 22642bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 22742bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss /* Root hub was already suspended. Disable irq emission and 22816032c4f5b291af541e9114a09ea20ff5a0dc474Alan Stern * mark HW unaccessible. The PM and USB cores make sure that 22916032c4f5b291af541e9114a09ea20ff5a0dc474Alan Stern * the root hub is either suspended or stopped. 23042bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss */ 2314147200d25c423e627ab4487530b3d9f2ef829c8Alan Stern ehci_prepare_ports_for_controller_suspend(ehci, device_may_wakeup(dev)); 232148fc55fd0449683a1d15bf219ad8d8b6fa17545Yin Kangkai spin_lock_irqsave(&ehci->lock, flags); 23342bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss ehci_writel(ehci, 0, &ehci->regs->intr_enable); 23442bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss (void)ehci_readl(ehci, &ehci->regs->intr_enable); 23542bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 23642bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 23742bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 23842bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss au1xxx_stop_ehc(); 23942bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss spin_unlock_irqrestore(&ehci->lock, flags); 24042bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 24142bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss // could save FLADJ in case of Vaux power loss 24242bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss // ... we'd only use it to handle clock skew 24342bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 24442bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss return rc; 24576fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse} 24642bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 247807fcb5e19877d339a4cc56f2c6ddaf3a147457aManuel Laussstatic int ehci_hcd_au1xxx_drv_resume(struct device *dev) 24876fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse{ 249807fcb5e19877d339a4cc56f2c6ddaf3a147457aManuel Lauss struct usb_hcd *hcd = dev_get_drvdata(dev); 25042bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss struct ehci_hcd *ehci = hcd_to_ehci(hcd); 25142bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 25242bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss au1xxx_start_ehc(); 25342bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 25442bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss // maybe restore FLADJ 25542bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 25642bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss if (time_before(jiffies, ehci->next_statechange)) 25742bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss msleep(100); 25842bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 25942bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss /* Mark hardware accessible again as we are out of D3 state by now */ 26042bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); 26142bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 26242bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss /* If CF is still set, we maintained PCI Vaux power. 26342bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss * Just undo the effect of ehci_pci_suspend(). 26442bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss */ 26542bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF) { 26642bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss int mask = INTR_MASK; 26742bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 26816032c4f5b291af541e9114a09ea20ff5a0dc474Alan Stern ehci_prepare_ports_for_controller_resume(ehci); 26942bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss if (!hcd->self.root_hub->do_remote_wakeup) 27042bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss mask &= ~STS_PCD; 27142bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss ehci_writel(ehci, mask, &ehci->regs->intr_enable); 27242bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss ehci_readl(ehci, &ehci->regs->intr_enable); 27342bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss return 0; 27442bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss } 27542bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 27642bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss ehci_dbg(ehci, "lost power, restarting\n"); 27742bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss usb_root_hub_lost_power(hcd->self.root_hub); 27842bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 27942bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss /* Else reset, to cope with power loss or flush-to-storage 28042bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss * style "resume" having let BIOS kick in during reboot. 28142bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss */ 28242bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss (void) ehci_halt(ehci); 28342bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss (void) ehci_reset(ehci); 28442bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 28542bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss /* emptying the schedule aborts any urbs */ 28642bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss spin_lock_irq(&ehci->lock); 28742bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss if (ehci->reclaim) 28842bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss end_unlink_async(ehci); 28942bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss ehci_work(ehci); 29042bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss spin_unlock_irq(&ehci->lock); 29142bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 29242bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss ehci_writel(ehci, ehci->command, &ehci->regs->command); 29342bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag); 29442bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss ehci_readl(ehci, &ehci->regs->command); /* unblock posted writes */ 29542bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 29642bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss /* here we "know" root ports should always stay powered */ 29742bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss ehci_port_power(ehci, 1); 29842bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 29942bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss hcd->state = HC_STATE_SUSPENDED; 30076fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse 30176fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse return 0; 30276fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse} 30342bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss 304471452104b8520337ae2fb48c4e61cd4896e025dAlexey Dobriyanstatic const struct dev_pm_ops au1xxx_ehci_pmops = { 305807fcb5e19877d339a4cc56f2c6ddaf3a147457aManuel Lauss .suspend = ehci_hcd_au1xxx_drv_suspend, 306807fcb5e19877d339a4cc56f2c6ddaf3a147457aManuel Lauss .resume = ehci_hcd_au1xxx_drv_resume, 307807fcb5e19877d339a4cc56f2c6ddaf3a147457aManuel Lauss}; 308807fcb5e19877d339a4cc56f2c6ddaf3a147457aManuel Lauss 309807fcb5e19877d339a4cc56f2c6ddaf3a147457aManuel Lauss#define AU1XXX_EHCI_PMOPS &au1xxx_ehci_pmops 310807fcb5e19877d339a4cc56f2c6ddaf3a147457aManuel Lauss 31142bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss#else 312807fcb5e19877d339a4cc56f2c6ddaf3a147457aManuel Lauss#define AU1XXX_EHCI_PMOPS NULL 31342bfc7b44f724fb5ce838fc2f552a3eb8cd768ecManuel Lauss#endif 31453c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss 315d14feb5ee4a46218f92b21ed52338b64130a151bDaniel Mackstatic struct platform_driver ehci_hcd_au1xxx_driver = { 31653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .probe = ehci_hcd_au1xxx_drv_probe, 31753c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .remove = ehci_hcd_au1xxx_drv_remove, 31853c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .shutdown = usb_hcd_platform_shutdown, 319d14feb5ee4a46218f92b21ed52338b64130a151bDaniel Mack .driver = { 32053c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .name = "au1xxx-ehci", 32153c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss .owner = THIS_MODULE, 322807fcb5e19877d339a4cc56f2c6ddaf3a147457aManuel Lauss .pm = AU1XXX_EHCI_PMOPS, 323d14feb5ee4a46218f92b21ed52338b64130a151bDaniel Mack } 32476fa9a240de4294a097235c9ddd470c21eb3449eJordan Crouse}; 32553c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel Lauss 32653c81a348fa1d21dd042d9c9a9f91795f83fed66Manuel LaussMODULE_ALIAS("platform:au1xxx-ehci"); 327