2 * EHCI HCD (Host Controller Driver) for USB.
4 * Bus Glue for AMD Alchemy Au1xxx
6 * Based on "ohci-au1xxx.c" by Matt Porter <mporter@kernel.crashing.org>
8 * Modified for AMD Alchemy Au1200 EHC
9 * by K.Boge <karsten.boge@amd.com>
11 * This file is licenced under the GPL.
14 #include <linux/platform_device.h>
15 #include <asm/mach-au1x00/au1000.h>
17 #define USB_HOST_CONFIG (USB_MSR_BASE + USB_MSR_MCFG)
18 #define USB_MCFG_PFEN (1<<31)
19 #define USB_MCFG_RDCOMB (1<<30)
20 #define USB_MCFG_SSDEN (1<<23)
21 #define USB_MCFG_PHYPLLEN (1<<19)
22 #define USB_MCFG_UCECLKEN (1<<18)
23 #define USB_MCFG_EHCCLKEN (1<<17)
24 #ifdef CONFIG_DMA_COHERENT
25 #define USB_MCFG_UCAM (1<<7)
27 #define USB_MCFG_UCAM (0)
29 #define USB_MCFG_EBMEN (1<<3)
30 #define USB_MCFG_EMEMEN (1<<2)
32 #define USBH_ENABLE_CE (USB_MCFG_PHYPLLEN | USB_MCFG_EHCCLKEN)
33 #define USBH_ENABLE_INIT (USB_MCFG_PFEN | USB_MCFG_RDCOMB | \
34 USBH_ENABLE_CE | USB_MCFG_SSDEN | \
35 USB_MCFG_UCAM | USB_MCFG_EBMEN | \
38 #define USBH_DISABLE (USB_MCFG_EBMEN | USB_MCFG_EMEMEN)
40 extern int usb_disabled(void);
42 static void au1xxx_start_ehc(void)
44 /* enable clock to EHCI block and HS PHY PLL*/
45 au_writel(au_readl(USB_HOST_CONFIG) | USBH_ENABLE_CE, USB_HOST_CONFIG);
49 /* enable EHCI mmio */
50 au_writel(au_readl(USB_HOST_CONFIG) | USBH_ENABLE_INIT, USB_HOST_CONFIG);
55 static void au1xxx_stop_ehc(void)
60 au_writel(au_readl(USB_HOST_CONFIG) & ~USBH_DISABLE, USB_HOST_CONFIG);
64 /* Disable EHC clock. If the HS PHY is unused disable it too. */
65 c = au_readl(USB_HOST_CONFIG) & ~USB_MCFG_EHCCLKEN;
66 if (!(c & USB_MCFG_UCECLKEN)) /* UDC disabled? */
67 c &= ~USB_MCFG_PHYPLLEN; /* yes: disable HS PHY PLL */
68 au_writel(c, USB_HOST_CONFIG);
72 static const struct hc_driver ehci_au1xxx_hc_driver = {
73 .description = hcd_name,
74 .product_desc = "Au1xxx EHCI",
75 .hcd_priv_size = sizeof(struct ehci_hcd),
78 * generic hardware linkage
81 .flags = HCD_MEMORY | HCD_USB2,
84 * basic lifecycle operations
86 * FIXME -- ehci_init() doesn't do enough here.
87 * See ehci-ppc-soc for a complete implementation.
92 .shutdown = ehci_shutdown,
95 * managing i/o requests and associated device resources
97 .urb_enqueue = ehci_urb_enqueue,
98 .urb_dequeue = ehci_urb_dequeue,
99 .endpoint_disable = ehci_endpoint_disable,
104 .get_frame_number = ehci_get_frame,
109 .hub_status_data = ehci_hub_status_data,
110 .hub_control = ehci_hub_control,
111 .bus_suspend = ehci_bus_suspend,
112 .bus_resume = ehci_bus_resume,
113 .relinquish_port = ehci_relinquish_port,
114 .port_handed_over = ehci_port_handed_over,
117 static int ehci_hcd_au1xxx_drv_probe(struct platform_device *pdev)
120 struct ehci_hcd *ehci;
126 #if defined(CONFIG_SOC_AU1200) && defined(CONFIG_DMA_COHERENT)
127 /* Au1200 AB USB does not support coherent memory */
128 if (!(read_c0_prid() & 0xff)) {
129 printk(KERN_INFO "%s: this is chip revision AB!\n", pdev->name);
130 printk(KERN_INFO "%s: update your board or re-configure"
131 " the kernel\n", pdev->name);
136 if (pdev->resource[1].flags != IORESOURCE_IRQ) {
137 pr_debug("resource[1] is not IORESOURCE_IRQ");
140 hcd = usb_create_hcd(&ehci_au1xxx_hc_driver, &pdev->dev, "Au1xxx");
144 hcd->rsrc_start = pdev->resource[0].start;
145 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
147 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
148 pr_debug("request_mem_region failed");
153 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
155 pr_debug("ioremap failed");
162 ehci = hcd_to_ehci(hcd);
163 ehci->caps = hcd->regs;
164 ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
165 /* cache this readonly data; minimize chip reads */
166 ehci->hcs_params = readl(&ehci->caps->hcs_params);
168 ret = usb_add_hcd(hcd, pdev->resource[1].start,
169 IRQF_DISABLED | IRQF_SHARED);
171 platform_set_drvdata(pdev, hcd);
178 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
184 static int ehci_hcd_au1xxx_drv_remove(struct platform_device *pdev)
186 struct usb_hcd *hcd = platform_get_drvdata(pdev);
190 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
193 platform_set_drvdata(pdev, NULL);
199 /*static int ehci_hcd_au1xxx_drv_suspend(struct device *dev)
201 struct platform_device *pdev = to_platform_device(dev);
202 struct usb_hcd *hcd = dev_get_drvdata(dev);
206 static int ehci_hcd_au1xxx_drv_resume(struct device *dev)
208 struct platform_device *pdev = to_platform_device(dev);
209 struct usb_hcd *hcd = dev_get_drvdata(dev);
215 static struct platform_driver ehci_hcd_au1xxx_driver = {
216 .probe = ehci_hcd_au1xxx_drv_probe,
217 .remove = ehci_hcd_au1xxx_drv_remove,
218 .shutdown = usb_hcd_platform_shutdown,
219 /*.suspend = ehci_hcd_au1xxx_drv_suspend, */
220 /*.resume = ehci_hcd_au1xxx_drv_resume, */
222 .name = "au1xxx-ehci",
223 .owner = THIS_MODULE,
227 MODULE_ALIAS("platform:au1xxx-ehci");