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Diffstat (limited to 'drivers/usb/host/ehci-omap.c')
-rw-r--r--drivers/usb/host/ehci-omap.c331
1 files changed, 144 insertions, 187 deletions
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 0555ee42d7cb..3d1491b5f360 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -4,10 +4,11 @@
* Bus Glue for the EHCI controllers in OMAP3/4
* Tested on several OMAP3 boards, and OMAP4 Pandaboard
*
- * Copyright (C) 2007-2011 Texas Instruments, Inc.
+ * Copyright (C) 2007-2013 Texas Instruments, Inc.
* Author: Vikram Pandita <vikram.pandita@ti.com>
* Author: Anand Gadiyar <gadiyar@ti.com>
* Author: Keshava Munegowda <keshava_mgowda@ti.com>
+ * Author: Roger Quadros <rogerq@ti.com>
*
* Copyright (C) 2009 Nokia Corporation
* Contact: Felipe Balbi <felipe.balbi@nokia.com>
@@ -28,21 +29,23 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
- * TODO (last updated Feb 27, 2010):
- * - add kernel-doc
- * - enable AUTOIDLE
- * - add suspend/resume
- * - add HSIC and TLL support
- * - convert to use hwmod and runtime PM
*/
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/usb/ulpi.h>
-#include <linux/regulator/consumer.h>
#include <linux/pm_runtime.h>
#include <linux/gpio.h>
#include <linux/clk.h>
+#include <linux/usb.h>
+#include <linux/usb/hcd.h>
+#include <linux/of.h>
+#include <linux/dma-mapping.h>
+
+#include "ehci.h"
#include <linux/platform_data/usb-omap.h>
@@ -57,10 +60,16 @@
#define EHCI_INSNREG05_ULPI_EXTREGADD_SHIFT 8
#define EHCI_INSNREG05_ULPI_WRDATA_SHIFT 0
-/*-------------------------------------------------------------------------*/
+#define DRIVER_DESC "OMAP-EHCI Host Controller driver"
+
+static const char hcd_name[] = "ehci-omap";
-static const struct hc_driver ehci_omap_hc_driver;
+/*-------------------------------------------------------------------------*/
+struct omap_hcd {
+ struct usb_phy *phy[OMAP3_HS_USB_PORTS]; /* one PHY for each port */
+ int nports;
+};
static inline void ehci_write(void __iomem *base, u32 reg, u32 val)
{
@@ -72,99 +81,16 @@ static inline u32 ehci_read(void __iomem *base, u32 reg)
return __raw_readl(base + reg);
}
+/* configure so an HC device and id are always provided */
+/* always called with process context; sleeping is OK */
-static void omap_ehci_soft_phy_reset(struct usb_hcd *hcd, u8 port)
-{
- unsigned long timeout = jiffies + msecs_to_jiffies(1000);
- unsigned reg = 0;
-
- reg = ULPI_FUNC_CTRL_RESET
- /* FUNCTION_CTRL_SET register */
- | (ULPI_SET(ULPI_FUNC_CTRL) << EHCI_INSNREG05_ULPI_REGADD_SHIFT)
- /* Write */
- | (2 << EHCI_INSNREG05_ULPI_OPSEL_SHIFT)
- /* PORTn */
- | ((port + 1) << EHCI_INSNREG05_ULPI_PORTSEL_SHIFT)
- /* start ULPI access*/
- | (1 << EHCI_INSNREG05_ULPI_CONTROL_SHIFT);
-
- ehci_write(hcd->regs, EHCI_INSNREG05_ULPI, reg);
-
- /* Wait for ULPI access completion */
- while ((ehci_read(hcd->regs, EHCI_INSNREG05_ULPI)
- & (1 << EHCI_INSNREG05_ULPI_CONTROL_SHIFT))) {
- cpu_relax();
-
- if (time_after(jiffies, timeout)) {
- dev_dbg(hcd->self.controller,
- "phy reset operation timed out\n");
- break;
- }
- }
-}
-
-static int omap_ehci_init(struct usb_hcd *hcd)
-{
- struct ehci_hcd *ehci = hcd_to_ehci(hcd);
- int rc;
- struct usbhs_omap_platform_data *pdata;
-
- pdata = hcd->self.controller->platform_data;
-
- /* Hold PHYs in reset while initializing EHCI controller */
- if (pdata->phy_reset) {
- if (gpio_is_valid(pdata->reset_gpio_port[0]))
- gpio_set_value_cansleep(pdata->reset_gpio_port[0], 0);
-
- if (gpio_is_valid(pdata->reset_gpio_port[1]))
- gpio_set_value_cansleep(pdata->reset_gpio_port[1], 0);
-
- /* Hold the PHY in RESET for enough time till DIR is high */
- udelay(10);
- }
-
- /* Soft reset the PHY using PHY reset command over ULPI */
- if (pdata->port_mode[0] == OMAP_EHCI_PORT_MODE_PHY)
- omap_ehci_soft_phy_reset(hcd, 0);
- if (pdata->port_mode[1] == OMAP_EHCI_PORT_MODE_PHY)
- omap_ehci_soft_phy_reset(hcd, 1);
-
- /* we know this is the memory we want, no need to ioremap again */
- ehci->caps = hcd->regs;
-
- rc = ehci_setup(hcd);
-
- if (pdata->phy_reset) {
- /* Hold the PHY in RESET for enough time till
- * PHY is settled and ready
- */
- udelay(10);
-
- if (gpio_is_valid(pdata->reset_gpio_port[0]))
- gpio_set_value_cansleep(pdata->reset_gpio_port[0], 1);
-
- if (gpio_is_valid(pdata->reset_gpio_port[1]))
- gpio_set_value_cansleep(pdata->reset_gpio_port[1], 1);
- }
-
- return rc;
-}
+static struct hc_driver __read_mostly ehci_omap_hc_driver;
-static void disable_put_regulator(
- struct usbhs_omap_platform_data *pdata)
-{
- int i;
-
- for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) {
- if (pdata->regulator[i]) {
- regulator_disable(pdata->regulator[i]);
- regulator_put(pdata->regulator[i]);
- }
- }
-}
+static const struct ehci_driver_overrides ehci_omap_overrides __initdata = {
+ .extra_priv_size = sizeof(struct omap_hcd),
+};
-/* configure so an HC device and id are always provided */
-/* always called with process context; sleeping is OK */
+static u64 omap_ehci_dma_mask = DMA_BIT_MASK(32);
/**
* ehci_hcd_omap_probe - initialize TI-based HCDs
@@ -175,15 +101,15 @@ static void disable_put_regulator(
*/
static int ehci_hcd_omap_probe(struct platform_device *pdev)
{
- struct device *dev = &pdev->dev;
- struct usbhs_omap_platform_data *pdata = dev->platform_data;
- struct resource *res;
- struct usb_hcd *hcd;
- void __iomem *regs;
- int ret = -ENODEV;
- int irq;
- int i;
- char supply[7];
+ struct device *dev = &pdev->dev;
+ struct usbhs_omap_platform_data *pdata = dev->platform_data;
+ struct resource *res;
+ struct usb_hcd *hcd;
+ void __iomem *regs;
+ int ret = -ENODEV;
+ int irq;
+ int i;
+ struct omap_hcd *omap;
if (usb_disabled())
return -ENODEV;
@@ -193,52 +119,74 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
return -ENODEV;
}
- irq = platform_get_irq_byname(pdev, "ehci-irq");
- if (irq < 0) {
- dev_err(dev, "EHCI irq failed\n");
- return -ENODEV;
+ /* For DT boot, get platform data from parent. i.e. usbhshost */
+ if (dev->of_node) {
+ pdata = dev->parent->platform_data;
+ dev->platform_data = pdata;
}
- res = platform_get_resource_byname(pdev,
- IORESOURCE_MEM, "ehci");
- if (!res) {
- dev_err(dev, "UHH EHCI get resource failed\n");
+ if (!pdata) {
+ dev_err(dev, "Missing platform data\n");
return -ENODEV;
}
- regs = ioremap(res->start, resource_size(res));
- if (!regs) {
- dev_err(dev, "UHH EHCI ioremap failed\n");
- return -ENOMEM;
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(dev, "EHCI irq failed\n");
+ return -ENODEV;
}
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ regs = devm_ioremap_resource(dev, res);
+ if (IS_ERR(regs))
+ return PTR_ERR(regs);
+
+ /*
+ * Right now device-tree probed devices don't get dma_mask set.
+ * Since shared usb code relies on it, set it here for now.
+ * Once we have dma capability bindings this can go away.
+ */
+ if (!pdev->dev.dma_mask)
+ pdev->dev.dma_mask = &omap_ehci_dma_mask;
+
hcd = usb_create_hcd(&ehci_omap_hc_driver, dev,
dev_name(dev));
if (!hcd) {
- dev_err(dev, "failed to create hcd with err %d\n", ret);
- ret = -ENOMEM;
- goto err_io;
+ dev_err(dev, "Failed to create HCD\n");
+ return -ENOMEM;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = resource_size(res);
hcd->regs = regs;
-
- /* get ehci regulator and enable */
- for (i = 0 ; i < OMAP3_HS_USB_PORTS ; i++) {
- if (pdata->port_mode[i] != OMAP_EHCI_PORT_MODE_PHY) {
- pdata->regulator[i] = NULL;
- continue;
- }
- snprintf(supply, sizeof(supply), "hsusb%d", i);
- pdata->regulator[i] = regulator_get(dev, supply);
- if (IS_ERR(pdata->regulator[i])) {
- pdata->regulator[i] = NULL;
- dev_dbg(dev,
- "failed to get ehci port%d regulator\n", i);
- } else {
- regulator_enable(pdata->regulator[i]);
+ hcd_to_ehci(hcd)->caps = regs;
+
+ omap = (struct omap_hcd *)hcd_to_ehci(hcd)->priv;
+ omap->nports = pdata->nports;
+
+ platform_set_drvdata(pdev, hcd);
+
+ /* get the PHY devices if needed */
+ for (i = 0 ; i < omap->nports ; i++) {
+ struct usb_phy *phy;
+
+ /* get the PHY device */
+ if (dev->of_node)
+ phy = devm_usb_get_phy_by_phandle(dev, "phys", i);
+ else
+ phy = devm_usb_get_phy_dev(dev, i);
+ if (IS_ERR(phy)) {
+ /* Don't bail out if PHY is not absolutely necessary */
+ if (pdata->port_mode[i] != OMAP_EHCI_PORT_MODE_PHY)
+ continue;
+
+ ret = PTR_ERR(phy);
+ dev_err(dev, "Can't get PHY device for port %d: %d\n",
+ i, ret);
+ goto err_phy;
}
+
+ omap->phy[i] = phy;
}
pm_runtime_enable(dev);
@@ -262,16 +210,34 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
goto err_pm_runtime;
}
+ /*
+ * Bring PHYs out of reset.
+ * Even though HSIC mode is a PHY-less mode, the reset
+ * line exists between the chips and can be modelled
+ * as a PHY device for reset control.
+ */
+ for (i = 0; i < omap->nports; i++) {
+ if (!omap->phy[i])
+ continue;
+
+ usb_phy_init(omap->phy[i]);
+ /* bring PHY out of suspend */
+ usb_phy_set_suspend(omap->phy[i], 0);
+ }
return 0;
err_pm_runtime:
- disable_put_regulator(pdata);
pm_runtime_put_sync(dev);
+
+err_phy:
+ for (i = 0; i < omap->nports; i++) {
+ if (omap->phy[i])
+ usb_phy_shutdown(omap->phy[i]);
+ }
+
usb_put_hcd(hcd);
-err_io:
- iounmap(regs);
return ret;
}
@@ -286,14 +252,19 @@ err_io:
*/
static int ehci_hcd_omap_remove(struct platform_device *pdev)
{
- struct device *dev = &pdev->dev;
- struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct device *dev = &pdev->dev;
+ struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct omap_hcd *omap = (struct omap_hcd *)hcd_to_ehci(hcd)->priv;
+ int i;
usb_remove_hcd(hcd);
- disable_put_regulator(dev->platform_data);
- iounmap(hcd->regs);
- usb_put_hcd(hcd);
+ for (i = 0; i < omap->nports; i++) {
+ if (omap->phy[i])
+ usb_phy_shutdown(omap->phy[i]);
+ }
+
+ usb_put_hcd(hcd);
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);
@@ -308,6 +279,13 @@ static void ehci_hcd_omap_shutdown(struct platform_device *pdev)
hcd->driver->shutdown(hcd);
}
+static const struct of_device_id omap_ehci_dt_ids[] = {
+ { .compatible = "ti,ehci-omap" },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, omap_ehci_dt_ids);
+
static struct platform_driver ehci_hcd_omap_driver = {
.probe = ehci_hcd_omap_probe,
.remove = ehci_hcd_omap_remove,
@@ -315,56 +293,35 @@ static struct platform_driver ehci_hcd_omap_driver = {
/*.suspend = ehci_hcd_omap_suspend, */
/*.resume = ehci_hcd_omap_resume, */
.driver = {
- .name = "ehci-omap",
+ .name = hcd_name,
+ .of_match_table = of_match_ptr(omap_ehci_dt_ids),
}
};
/*-------------------------------------------------------------------------*/
-static const struct hc_driver ehci_omap_hc_driver = {
- .description = hcd_name,
- .product_desc = "OMAP-EHCI Host Controller",
- .hcd_priv_size = sizeof(struct ehci_hcd),
-
- /*
- * generic hardware linkage
- */
- .irq = ehci_irq,
- .flags = HCD_MEMORY | HCD_USB2,
-
- /*
- * basic lifecycle operations
- */
- .reset = omap_ehci_init,
- .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,
+static int __init ehci_omap_init(void)
+{
+ if (usb_disabled())
+ return -ENODEV;
- /*
- * scheduling support
- */
- .get_frame_number = ehci_get_frame,
+ pr_info("%s: " DRIVER_DESC "\n", hcd_name);
- /*
- * 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,
+ ehci_init_driver(&ehci_omap_hc_driver, &ehci_omap_overrides);
+ return platform_driver_register(&ehci_hcd_omap_driver);
+}
+module_init(ehci_omap_init);
- .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
-};
+static void __exit ehci_omap_cleanup(void)
+{
+ platform_driver_unregister(&ehci_hcd_omap_driver);
+}
+module_exit(ehci_omap_cleanup);
MODULE_ALIAS("platform:ehci-omap");
MODULE_AUTHOR("Texas Instruments, Inc.");
MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
+MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
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