+++ /dev/null
-/*
- * drivers/usb/host/ehci-pxa168.c
- *
- * Tanmay Upadhyay <tanmay.upadhyay@einfochips.com>
- *
- * Based on drivers/usb/host/ehci-orion.c
- *
- * 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/clk.h>
-#include <mach/pxa168.h>
-
-#define USB_PHY_CTRL_REG 0x4
-#define USB_PHY_PLL_REG 0x8
-#define USB_PHY_TX_REG 0xc
-
-#define FBDIV_SHIFT 4
-
-#define ICP_SHIFT 12
-#define ICP_15 2
-#define ICP_20 3
-#define ICP_25 4
-
-#define KVCO_SHIFT 15
-
-#define PLLCALI12_SHIFT 25
-#define CALI12_VDD 0
-#define CALI12_09 1
-#define CALI12_10 2
-#define CALI12_11 3
-
-#define PLLVDD12_SHIFT 27
-#define VDD12_VDD 0
-#define VDD12_10 1
-#define VDD12_11 2
-#define VDD12_12 3
-
-#define PLLVDD18_SHIFT 29
-#define VDD18_19 0
-#define VDD18_20 1
-#define VDD18_21 2
-#define VDD18_22 3
-
-
-#define PLL_READY (1 << 23)
-#define VCOCAL_START (1 << 21)
-#define REG_RCAL_START (1 << 12)
-
-struct pxa168_usb_drv_data {
- struct ehci_hcd ehci;
- struct clk *pxa168_usb_clk;
- struct resource *usb_phy_res;
- void __iomem *usb_phy_reg_base;
-};
-
-static int ehci_pxa168_setup(struct usb_hcd *hcd)
-{
- struct ehci_hcd *ehci = hcd_to_ehci(hcd);
- int retval;
-
- ehci_reset(ehci);
- retval = ehci_halt(ehci);
- if (retval)
- return retval;
-
- /*
- * data structure init
- */
- retval = ehci_init(hcd);
- if (retval)
- return retval;
-
- hcd->has_tt = 1;
-
- ehci_port_power(ehci, 0);
-
- return retval;
-}
-
-static const struct hc_driver ehci_pxa168_hc_driver = {
- .description = hcd_name,
- .product_desc = "Marvell PXA168 EHCI",
- .hcd_priv_size = sizeof(struct pxa168_usb_drv_data),
-
- /*
- * generic hardware linkage
- */
- .irq = ehci_irq,
- .flags = HCD_MEMORY | HCD_USB2,
-
- /*
- * basic lifecycle operations
- */
- .reset = ehci_pxa168_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 int pxa168_usb_phy_init(struct platform_device *pdev)
-{
- struct resource *res;
- void __iomem *usb_phy_reg_base;
- struct pxa168_usb_pdata *pdata;
- struct pxa168_usb_drv_data *drv_data;
- struct usb_hcd *hcd = platform_get_drvdata(pdev);
- unsigned long reg_val;
- int pll_retry_cont = 10000, err = 0;
-
- drv_data = (struct pxa168_usb_drv_data *)hcd->hcd_priv;
- pdata = (struct pxa168_usb_pdata *)pdev->dev.platform_data;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- if (!res) {
- dev_err(&pdev->dev,
- "Found HC with no PHY register addr. Check %s setup!\n",
- dev_name(&pdev->dev));
- return -ENODEV;
- }
-
- if (!request_mem_region(res->start, resource_size(res),
- ehci_pxa168_hc_driver.description)) {
- dev_dbg(&pdev->dev, "controller already in use\n");
- return -EBUSY;
- }
-
- usb_phy_reg_base = ioremap(res->start, resource_size(res));
- if (usb_phy_reg_base == NULL) {
- dev_dbg(&pdev->dev, "error mapping memory\n");
- err = -EFAULT;
- goto err1;
- }
- drv_data->usb_phy_reg_base = usb_phy_reg_base;
- drv_data->usb_phy_res = res;
-
- /* If someone wants to init USB phy in board specific way */
- if (pdata && pdata->phy_init)
- return pdata->phy_init(usb_phy_reg_base);
-
- /* Power up the PHY and PLL */
- writel(readl(usb_phy_reg_base + USB_PHY_CTRL_REG) | 0x3,
- usb_phy_reg_base + USB_PHY_CTRL_REG);
-
- /* Configure PHY PLL */
- reg_val = readl(usb_phy_reg_base + USB_PHY_PLL_REG) & ~(0x7e03ffff);
- reg_val |= (VDD18_22 << PLLVDD18_SHIFT | VDD12_12 << PLLVDD12_SHIFT |
- CALI12_11 << PLLCALI12_SHIFT | 3 << KVCO_SHIFT |
- ICP_15 << ICP_SHIFT | 0xee << FBDIV_SHIFT | 0xb);
- writel(reg_val, usb_phy_reg_base + USB_PHY_PLL_REG);
-
- /* Make sure PHY PLL is ready */
- while (!(readl(usb_phy_reg_base + USB_PHY_PLL_REG) & PLL_READY)) {
- if (!(pll_retry_cont--)) {
- dev_dbg(&pdev->dev, "USB PHY PLL not ready\n");
- err = -EIO;
- goto err2;
- }
- }
-
- /* Toggle VCOCAL_START bit of U2PLL for PLL calibration */
- udelay(200);
- writel(readl(usb_phy_reg_base + USB_PHY_PLL_REG) | VCOCAL_START,
- usb_phy_reg_base + USB_PHY_PLL_REG);
- udelay(40);
- writel(readl(usb_phy_reg_base + USB_PHY_PLL_REG) & ~VCOCAL_START,
- usb_phy_reg_base + USB_PHY_PLL_REG);
-
- /* Toggle REG_RCAL_START bit of U2PTX for impedance calibration */
- udelay(400);
- writel(readl(usb_phy_reg_base + USB_PHY_TX_REG) | REG_RCAL_START,
- usb_phy_reg_base + USB_PHY_TX_REG);
- udelay(40);
- writel(readl(usb_phy_reg_base + USB_PHY_TX_REG) & ~REG_RCAL_START,
- usb_phy_reg_base + USB_PHY_TX_REG);
-
- /* Make sure PHY PLL is ready again */
- pll_retry_cont = 0;
- while (!(readl(usb_phy_reg_base + USB_PHY_PLL_REG) & PLL_READY)) {
- if (!(pll_retry_cont--)) {
- dev_dbg(&pdev->dev, "USB PHY PLL not ready\n");
- err = -EIO;
- goto err2;
- }
- }
-
- return 0;
-err2:
- iounmap(usb_phy_reg_base);
-err1:
- release_mem_region(res->start, resource_size(res));
- return err;
-}
-
-static int __devinit ehci_pxa168_drv_probe(struct platform_device *pdev)
-{
- struct resource *res;
- struct usb_hcd *hcd;
- struct ehci_hcd *ehci;
- struct pxa168_usb_drv_data *drv_data;
- void __iomem *regs;
- int irq, err = 0;
-
- if (usb_disabled())
- return -ENODEV;
-
- pr_debug("Initializing pxa168-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_pxa168_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_pxa168_hc_driver,
- &pdev->dev, dev_name(&pdev->dev));
- if (!hcd) {
- err = -ENOMEM;
- goto err3;
- }
-
- drv_data = (struct pxa168_usb_drv_data *)hcd->hcd_priv;
-
- /* Enable USB clock */
- drv_data->pxa168_usb_clk = clk_get(&pdev->dev, "PXA168-USBCLK");
- if (IS_ERR(drv_data->pxa168_usb_clk)) {
- dev_err(&pdev->dev, "Couldn't get USB clock\n");
- err = PTR_ERR(drv_data->pxa168_usb_clk);
- goto err4;
- }
- clk_enable(drv_data->pxa168_usb_clk);
-
- err = pxa168_usb_phy_init(pdev);
- if (err) {
- dev_err(&pdev->dev, "USB PHY initialization failed\n");
- goto err5;
- }
-
- 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;
-
- err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED);
- if (err)
- goto err5;
-
- return 0;
-
-err5:
- clk_disable(drv_data->pxa168_usb_clk);
- clk_put(drv_data->pxa168_usb_clk);
-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_pxa168_drv_remove(struct platform_device *pdev)
-{
- struct usb_hcd *hcd = platform_get_drvdata(pdev);
- struct pxa168_usb_drv_data *drv_data =
- (struct pxa168_usb_drv_data *)hcd->hcd_priv;
-
- usb_remove_hcd(hcd);
-
- /* Power down PHY & PLL */
- writel(readl(drv_data->usb_phy_reg_base + USB_PHY_CTRL_REG) & (~0x3),
- drv_data->usb_phy_reg_base + USB_PHY_CTRL_REG);
-
- clk_disable(drv_data->pxa168_usb_clk);
- clk_put(drv_data->pxa168_usb_clk);
-
- iounmap(hcd->regs);
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
-
- iounmap(drv_data->usb_phy_reg_base);
- release_mem_region(drv_data->usb_phy_res->start,
- resource_size(drv_data->usb_phy_res));
-
- usb_put_hcd(hcd);
-
- return 0;
-}
-
-MODULE_ALIAS("platform:pxa168-ehci");
-
-static struct platform_driver ehci_pxa168_driver = {
- .probe = ehci_pxa168_drv_probe,
- .remove = __exit_p(ehci_pxa168_drv_remove),
- .shutdown = usb_hcd_platform_shutdown,
- .driver.name = "pxa168-ehci",
-};
projects / mirror_ubuntu-artful-kernel.git / commitdiff