| /* |
| * drivers/usb/host/ehci-orion.c |
| * |
| * Tzachi Perelstein <tzachi@marvell.com> |
| * |
| * 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 <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/mbus.h> |
| #include <plat/ehci-orion.h> |
| |
| #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_setup(struct usb_hcd *hcd) |
| { |
| /* |
| * 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; |
| |
| retval = ehci_halt(ehci); |
| if (retval) |
| return retval; |
| |
| /* |
| * data structure init |
| */ |
| retval = ehci_init(hcd); |
| if (retval) |
| return retval; |
| |
| hcd->has_tt = 1; |
| |
| 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, |
| |
| /* |
| * 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, |
| }; |
| |
| 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 __init 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, res->end - res->start + 1, |
| ehci_orion_hc_driver.description)) { |
| dev_dbg(&pdev->dev, "controller already in use\n"); |
| err = -EBUSY; |
| goto err1; |
| } |
| |
| regs = ioremap(res->start, res->end - res->start + 1); |
| 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 = res->end - res->start + 1; |
| hcd->regs = regs; |
| |
| ehci = hcd_to_ehci(hcd); |
| ehci->caps = hcd->regs + 0x100; |
| ehci->regs = hcd->regs + 0x100 + |
| HC_LENGTH(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 |
| */ |
| orion_usb_setup(hcd); |
| |
| err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED); |
| if (err) |
| goto err4; |
| |
| return 0; |
| |
| err4: |
| usb_put_hcd(hcd); |
| err3: |
| iounmap(regs); |
| err2: |
| release_mem_region(res->start, res->end - res->start + 1); |
| 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", |
| }; |