/* * drivers/usb/host/ehci-orion.c * * Tzachi Perelstein * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #include #include #include #include #include #define rdl(off) __raw_readl(hcd->regs + (off)) #define wrl(off, val) __raw_writel((val), hcd->regs + (off)) #define USB_CMD 0x140 #define USB_MODE 0x1a8 #define USB_CAUSE 0x310 #define USB_MASK 0x314 #define USB_WINDOW_CTRL(i) (0x320 + ((i) << 4)) #define USB_WINDOW_BASE(i) (0x324 + ((i) << 4)) #define USB_IPG 0x360 #define USB_PHY_PWR_CTRL 0x400 #define USB_PHY_TX_CTRL 0x420 #define USB_PHY_RX_CTRL 0x430 #define USB_PHY_IVREF_CTRL 0x440 #define USB_PHY_TST_GRP_CTRL 0x450 /* * Implement Orion USB controller specification guidelines */ static void orion_usb_phy_v1_setup(struct usb_hcd *hcd) { /* The below GLs are according to the Orion Errata document */ /* * Clear interrupt cause and mask */ wrl(USB_CAUSE, 0); wrl(USB_MASK, 0); /* * Reset controller */ wrl(USB_CMD, rdl(USB_CMD) | 0x2); while (rdl(USB_CMD) & 0x2); /* * GL# USB-10: Set IPG for non start of frame packets * Bits[14:8]=0xc */ wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00); /* * GL# USB-9: USB 2.0 Power Control * BG_VSEL[7:6]=0x1 */ wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40); /* * GL# USB-1: USB PHY Tx Control - force calibration to '8' * TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8 */ wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040); /* * GL# USB-3 GL# USB-9: USB PHY Rx Control * RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0, * CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1 */ wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010); /* * GL# USB-3 GL# USB-9: USB PHY IVREF Control * PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0 */ wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32); /* * GL# USB-3 GL# USB-9: USB PHY Test Group Control * REG_FIFO_SQ_RST[15]=0 */ wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000); /* * Stop and reset controller */ wrl(USB_CMD, rdl(USB_CMD) & ~0x1); wrl(USB_CMD, rdl(USB_CMD) | 0x2); while (rdl(USB_CMD) & 0x2); /* * GL# USB-5 Streaming disable REG_USB_MODE[4]=1 * TBD: This need to be done after each reset! * GL# USB-4 Setup USB Host mode */ wrl(USB_MODE, 0x13); } static int ehci_orion_setup(struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); int retval; hcd->has_tt = 1; retval = ehci_halt(ehci); if (retval) return retval; /* * data structure init */ retval = ehci_init(hcd); if (retval) return retval; ehci_reset(ehci); ehci_port_power(ehci, 0); return retval; } static const struct hc_driver ehci_orion_hc_driver = { .description = hcd_name, .product_desc = "Marvell Orion EHCI", .hcd_priv_size = sizeof(struct ehci_hcd), /* * generic hardware linkage */ .irq = ehci_irq, .flags = HCD_MEMORY | HCD_USB2, /* * basic lifecycle operations */ .reset = ehci_orion_setup, .start = ehci_run, .stop = ehci_stop, .shutdown = ehci_shutdown, /* * managing i/o requests and associated device resources */ .urb_enqueue = ehci_urb_enqueue, .urb_dequeue = ehci_urb_dequeue, .endpoint_disable = ehci_endpoint_disable, .endpoint_reset = ehci_endpoint_reset, /* * scheduling support */ .get_frame_number = ehci_get_frame, /* * root hub support */ .hub_status_data = ehci_hub_status_data, .hub_control = ehci_hub_control, .bus_suspend = ehci_bus_suspend, .bus_resume = ehci_bus_resume, .relinquish_port = ehci_relinquish_port, .port_handed_over = ehci_port_handed_over, .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, }; static void __init ehci_orion_conf_mbus_windows(struct usb_hcd *hcd, struct mbus_dram_target_info *dram) { int i; for (i = 0; i < 4; i++) { wrl(USB_WINDOW_CTRL(i), 0); wrl(USB_WINDOW_BASE(i), 0); } for (i = 0; i < dram->num_cs; i++) { struct mbus_dram_window *cs = dram->cs + i; wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) | (dram->mbus_dram_target_id << 4) | 1); wrl(USB_WINDOW_BASE(i), cs->base); } } static int __devinit ehci_orion_drv_probe(struct platform_device *pdev) { struct orion_ehci_data *pd = pdev->dev.platform_data; struct resource *res; struct usb_hcd *hcd; struct ehci_hcd *ehci; void __iomem *regs; int irq, err; if (usb_disabled()) return -ENODEV; pr_debug("Initializing Orion-SoC USB Host Controller\n"); irq = platform_get_irq(pdev, 0); if (irq <= 0) { dev_err(&pdev->dev, "Found HC with no IRQ. Check %s setup!\n", dev_name(&pdev->dev)); err = -ENODEV; goto err1; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "Found HC with no register addr. Check %s setup!\n", dev_name(&pdev->dev)); err = -ENODEV; goto err1; } if (!request_mem_region(res->start, resource_size(res), ehci_orion_hc_driver.description)) { dev_dbg(&pdev->dev, "controller already in use\n"); err = -EBUSY; goto err1; } regs = ioremap(res->start, resource_size(res)); if (regs == NULL) { dev_dbg(&pdev->dev, "error mapping memory\n"); err = -EFAULT; goto err2; } hcd = usb_create_hcd(&ehci_orion_hc_driver, &pdev->dev, dev_name(&pdev->dev)); if (!hcd) { err = -ENOMEM; goto err3; } hcd->rsrc_start = res->start; hcd->rsrc_len = resource_size(res); hcd->regs = regs; ehci = hcd_to_ehci(hcd); ehci->caps = hcd->regs + 0x100; ehci->regs = hcd->regs + 0x100 + HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase)); ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); hcd->has_tt = 1; ehci->sbrn = 0x20; /* * (Re-)program MBUS remapping windows if we are asked to. */ if (pd != NULL && pd->dram != NULL) ehci_orion_conf_mbus_windows(hcd, pd->dram); /* * setup Orion USB controller. */ switch (pd->phy_version) { case EHCI_PHY_NA: /* dont change USB phy settings */ break; case EHCI_PHY_ORION: orion_usb_phy_v1_setup(hcd); break; case EHCI_PHY_DD: case EHCI_PHY_KW: default: printk(KERN_WARNING "Orion ehci -USB phy version isn't supported.\n"); } err = usb_add_hcd(hcd, irq, IRQF_SHARED); if (err) goto err4; return 0; err4: usb_put_hcd(hcd); err3: iounmap(regs); err2: release_mem_region(res->start, resource_size(res)); err1: dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), err); return err; } static int __exit ehci_orion_drv_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); usb_remove_hcd(hcd); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); usb_put_hcd(hcd); return 0; } MODULE_ALIAS("platform:orion-ehci"); static struct platform_driver ehci_orion_driver = { .probe = ehci_orion_drv_probe, .remove = __exit_p(ehci_orion_drv_remove), .shutdown = usb_hcd_platform_shutdown, .driver.name = "orion-ehci", };