From: Keshava Munegowda <Keshava_mgowda@xxxxxx>
The platform driver for the TLL component of the OMAP USB host controller
is implemented. Depending on the TLL hardware revision , the TLL channels
are configured. The USB HS core driver uses this driver through exported
APIs from the TLL platform driver.
usb_tll_enable and usb_tll_disble are the exported APIs of the USB TLL
platform driver.
Signed-off-by: Keshava Munegowda <keshava_mgowda@xxxxxx>
Reviewed-by: Partha Basak <parthab@xxxxxxxxxxxx>
---
arch/arm/plat-omap/include/plat/usb.h | 8 +
drivers/mfd/Kconfig | 2 +-
drivers/mfd/Makefile | 2 +-
drivers/mfd/omap-usb-tll.c | 463 +++++++++++++++++++++++++++++++++
4 files changed, 473 insertions(+), 2 deletions(-)
create mode 100644 drivers/mfd/omap-usb-tll.c
diff --git a/arch/arm/plat-omap/include/plat/usb.h b/arch/arm/plat-omap/include/plat/usb.h
index dc864b5..eb1e47d 100644
--- a/arch/arm/plat-omap/include/plat/usb.h
+++ b/arch/arm/plat-omap/include/plat/usb.h
@@ -61,6 +61,10 @@ struct usbhs_omap_platform_data {
struct ehci_hcd_omap_platform_data *ehci_data;
struct ohci_hcd_omap_platform_data *ohci_data;
};
+
+struct usbtll_omap_platform_data {
+ enum usbhs_omap_port_mode port_mode[OMAP3_HS_USB_PORTS];
+};
/*-------------------------------------------------------------------------*/
#define OMAP1_OTG_BASE 0xfffb0400
@@ -105,6 +109,10 @@ extern int omap4430_phy_set_clk(struct device *dev, int on);
extern int omap4430_phy_init(struct device *dev);
extern int omap4430_phy_exit(struct device *dev);
extern int omap4430_phy_suspend(struct device *dev, int suspend);
+
+extern int omap_tll_enable(void);
+extern int omap_tll_disable(void);
+
#endif
extern void am35x_musb_reset(void);
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index f147395..5f75ad4 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -772,7 +772,7 @@ config MFD_WL1273_CORE
audio codec.
config MFD_OMAP_USB_HOST
- bool "Support OMAP USBHS core driver"
+ bool "Support OMAP USBHS core and TLL driver"
depends on USB_EHCI_HCD_OMAP || USB_OHCI_HCD_OMAP3
default y
help
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index b953bab..4b3a8e0 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -105,7 +105,7 @@ obj-$(CONFIG_MFD_TPS6586X) += tps6586x.o
obj-$(CONFIG_MFD_VX855) += vx855.o
obj-$(CONFIG_MFD_WL1273_CORE) += wl1273-core.o
obj-$(CONFIG_MFD_CS5535) += cs5535-mfd.o
-obj-$(CONFIG_MFD_OMAP_USB_HOST) += omap-usb-host.o
+obj-$(CONFIG_MFD_OMAP_USB_HOST) += omap-usb-host.o omap-usb-tll.o
obj-$(CONFIG_MFD_PM8921_CORE) += pm8921-core.o
obj-$(CONFIG_MFD_PM8XXX_IRQ) += pm8xxx-irq.o
obj-$(CONFIG_TPS65911_COMPARATOR) += tps65911-comparator.o
diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c
new file mode 100644
index 0000000..3da468a
--- /dev/null
+++ b/drivers/mfd/omap-usb-tll.c
@@ -0,0 +1,463 @@
+/**
+ * omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
+ * Author: Keshava Munegowda <keshava_mgowda@xxxxxx>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 of
+ * the License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <plat/usb.h>
+#include <linux/pm_runtime.h>
+
+#define USBTLL_DRIVER_NAME "usbhs_tll"
+
+/* TLL Register Set */
+#define OMAP_USBTLL_REVISION (0x00)
+#define OMAP_USBTLL_SYSCONFIG (0x10)
+#define OMAP_USBTLL_SYSCONFIG_CACTIVITY (1 << 8)
+#define OMAP_USBTLL_SYSCONFIG_SIDLEMODE (1 << 3)
+#define OMAP_USBTLL_SYSCONFIG_ENAWAKEUP (1 << 2)
+#define OMAP_USBTLL_SYSCONFIG_SOFTRESET (1 << 1)
+#define OMAP_USBTLL_SYSCONFIG_AUTOIDLE (1 << 0)
+
+#define OMAP_USBTLL_SYSSTATUS (0x14)
+#define OMAP_USBTLL_SYSSTATUS_RESETDONE (1 << 0)
+
+#define OMAP_USBTLL_IRQSTATUS (0x18)
+#define OMAP_USBTLL_IRQENABLE (0x1C)
+
+#define OMAP_TLL_SHARED_CONF (0x30)
+#define OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN (1 << 6)
+#define OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN (1 << 5)
+#define OMAP_TLL_SHARED_CONF_USB_DIVRATION (1 << 2)
+#define OMAP_TLL_SHARED_CONF_FCLK_REQ (1 << 1)
+#define OMAP_TLL_SHARED_CONF_FCLK_IS_ON (1 << 0)
+
+#define OMAP_TLL_CHANNEL_CONF(num) (0x040 + 0x004 * num)
+#define OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT 24
+#define OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF (1 << 11)
+#define OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE (1 << 10)
+#define OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE (1 << 9)
+#define OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE (1 << 8)
+#define OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS (1 << 1)
+#define OMAP_TLL_CHANNEL_CONF_CHANEN (1 << 0)
+
+#define OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0 0x0
+#define OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM 0x1
+#define OMAP_TLL_FSLSMODE_3PIN_PHY 0x2
+#define OMAP_TLL_FSLSMODE_4PIN_PHY 0x3
+#define OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0 0x4
+#define OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM 0x5
+#define OMAP_TLL_FSLSMODE_3PIN_TLL 0x6
+#define OMAP_TLL_FSLSMODE_4PIN_TLL 0x7
+#define OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0 0xA
+#define OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM 0xB
+
+#define OMAP_TLL_ULPI_FUNCTION_CTRL(num) (0x804 + 0x100 * num)
+#define OMAP_TLL_ULPI_INTERFACE_CTRL(num) (0x807 + 0x100 * num)
+#define OMAP_TLL_ULPI_OTG_CTRL(num) (0x80A + 0x100 * num)
+#define OMAP_TLL_ULPI_INT_EN_RISE(num) (0x80D + 0x100 * num)
+#define OMAP_TLL_ULPI_INT_EN_FALL(num) (0x810 + 0x100 * num)
+#define OMAP_TLL_ULPI_INT_STATUS(num) (0x813 + 0x100 * num)
+#define OMAP_TLL_ULPI_INT_LATCH(num) (0x814 + 0x100 * num)
+#define OMAP_TLL_ULPI_DEBUG(num) (0x815 + 0x100 * num)
+#define OMAP_TLL_ULPI_SCRATCH_REGISTER(num) (0x816 + 0x100 * num)
+
+#define OMAP_REV2_TLL_CHANNEL_COUNT 2
+#define OMAP_TLL_CHANNEL_COUNT 3
+#define OMAP_TLL_CHANNEL_1_EN_MASK (1 << 0)
+#define OMAP_TLL_CHANNEL_2_EN_MASK (1 << 1)
+#define OMAP_TLL_CHANNEL_3_EN_MASK (1 << 2)
+
+/* Values of USBTLL_REVISION - Note: these are not given in the TRM */
+#define OMAP_USBTLL_REV1 0x00000015 /* OMAP3 */
+#define OMAP_USBTLL_REV2 0x00000004 /* OMAP4 */
+
+#define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL)
+
+struct usbtll_omap {
+ struct clk *usbtll_p1_fck;
+ struct clk *usbtll_p2_fck;
+ struct usbtll_omap_platform_data platdata;
+ spinlock_t lock;
+};
+
+/*-------------------------------------------------------------------------*/
+
+const char usbtll_driver_name[] = USBTLL_DRIVER_NAME;
+struct platform_device *tll_pdev;
+
+/*-------------------------------------------------------------------------*/
+
+static inline void usbtll_write(void __iomem *base, u32 reg, u32 val)
+{
+ __raw_writel(val, base + reg);
+}
+
+static inline u32 usbtll_read(void __iomem *base, u32 reg)
+{
+ return __raw_readl(base + reg);
+}
+
+static inline void usbtll_writeb(void __iomem *base, u8 reg, u8 val)
+{
+ __raw_writeb(val, base + reg);
+}
+
+static inline u8 usbtll_readb(void __iomem *base, u8 reg)
+{
+ return __raw_readb(base + reg);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static bool is_ohci_port(enum usbhs_omap_port_mode pmode)
+{
+ switch (pmode) {
+ case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
+ case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
+ case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
+ case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
+ case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
+ case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
+ case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
+ case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
+ case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
+ case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
+/*
+ * convert the port-mode enum to a value we can use in the FSLSMODE
+ * field of USBTLL_CHANNEL_CONF
+ */
+static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode)
+{
+ switch (mode) {
+ case OMAP_USBHS_PORT_MODE_UNUSED:
+ case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0:
+ return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
+
+ case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM:
+ return OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM;
+
+ case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0:
+ return OMAP_TLL_FSLSMODE_3PIN_PHY;
+
+ case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM:
+ return OMAP_TLL_FSLSMODE_4PIN_PHY;
+
+ case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0:
+ return OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0;
+
+ case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM:
+ return OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM;
+
+ case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0:
+ return OMAP_TLL_FSLSMODE_3PIN_TLL;
+
+ case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM:
+ return OMAP_TLL_FSLSMODE_4PIN_TLL;
+
+ case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0:
+ return OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0;
+
+ case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM:
+ return OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM;
+ default:
+ pr_warning("Invalid port mode, using default\n");
+ return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0;
+ }
+}
+
+/**
+ * usbtll_omap_probe - initialize TI-based HCDs
+ *
+ * Allocates basic resources for this USB host controller.
+ */
+static int __devinit usbtll_omap_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct usbtll_omap_platform_data *pdata = dev->platform_data;
+ void __iomem *base;
+ struct resource *res;
+ struct usbtll_omap *tll;
+ unsigned reg;
+ unsigned long flags;
+ int ret = 0;
+ int i, ver, count;
+
+ dev_dbg(dev, "starting TI HSUSB TLL Controller\n");
+
+ tll = kzalloc(sizeof(struct usbtll_omap), GFP_KERNEL);
+ if (!tll) {
+ dev_err(dev, "Memory allocation failed\n");
+ ret = -ENOMEM;
+ goto end;
+ }
+
+ spin_lock_init(&tll->lock);
+
+ for (i = 0; i < OMAP3_HS_USB_PORTS; i++)
+ tll->platdata.port_mode[i] = pdata->port_mode[i];
+
+ tll->usbtll_p1_fck = clk_get(dev, "usb_tll_hs_usb_ch0_clk");
+ if (IS_ERR(tll->usbtll_p1_fck)) {
+ ret = PTR_ERR(tll->usbtll_p1_fck);
+ dev_err(dev, "usbtll_p1_fck failed error:%d\n", ret);
+ goto err_tll;
+ }
+
+ tll->usbtll_p2_fck = clk_get(dev, "usb_tll_hs_usb_ch1_clk");
+ if (IS_ERR(tll->usbtll_p2_fck)) {
+ ret = PTR_ERR(tll->usbtll_p2_fck);
+ dev_err(dev, "usbtll_p2_fck failed error:%d\n", ret);
+ goto err_usbtll_p1_fck;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "usb tll get resource failed\n");
+ ret = -ENODEV;
+ goto err_usbtll_p2_fck;
+ }
+
+ base = ioremap(res->start, resource_size(res));
+ if (!base) {
+ dev_err(dev, "TLL ioremap failed\n");
+ ret = -ENOMEM;
+ goto err_usbtll_p2_fck;
+ }
+
+ platform_set_drvdata(pdev, tll);
+ pm_runtime_enable(dev);
+ pm_runtime_get_sync(dev);
+
+ spin_lock_irqsave(&tll->lock, flags);
+
+ ver = usbtll_read(base, OMAP_USBTLL_REVISION);
+ if (ver == OMAP_USBTLL_REV1)
+ count = OMAP_TLL_CHANNEL_COUNT;
+ else if (ver == OMAP_USBTLL_REV2)
+ count = OMAP_REV2_TLL_CHANNEL_COUNT;
+ else {
+ dev_err(dev, "TLL version failed\n");
+ ret = -ENODEV;
+ goto err_ioremap;
+ }
+
+ if (is_ehci_tll_mode(pdata->port_mode[0]) ||
+ is_ehci_tll_mode(pdata->port_mode[1]) ||
+ is_ehci_tll_mode(pdata->port_mode[2]) ||
+ (is_ohci_port(pdata->port_mode[0])) ||
+ (is_ohci_port(pdata->port_mode[1])) ||
+ (is_ohci_port(pdata->port_mode[2]))) {
+
+ /* Program Common TLL register */
+ reg = usbtll_read(base, OMAP_TLL_SHARED_CONF);
+ reg |= (OMAP_TLL_SHARED_CONF_FCLK_IS_ON
+ | OMAP_TLL_SHARED_CONF_USB_DIVRATION);
+ reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN;
+ reg &= ~OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN;
+
+ usbtll_write(base, OMAP_TLL_SHARED_CONF, reg);
+
+ /* Enable channels now */
+ for (i = 0; i < count; i++) {
+ reg = usbtll_read(base, OMAP_TLL_CHANNEL_CONF(i));
+
+ if (is_ohci_port(pdata->port_mode[i])) {
+ reg |= ohci_omap3_fslsmode(pdata->port_mode[i])
+ << OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT;
+ reg |= OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS;
+ } else
+ if (pdata->port_mode[i] == OMAP_EHCI_PORT_MODE_TLL) {
+
+ /*
+ * Disable AutoIdle, BitStuffing
+ * and use SDR Mode
+ */
+ reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE
+ | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
+ | OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE);
+ } else
+ continue;
+
+ reg |= OMAP_TLL_CHANNEL_CONF_CHANEN;
+ usbtll_write(base, OMAP_TLL_CHANNEL_CONF(i), reg);
+
+ usbtll_writeb(base,
+ OMAP_TLL_ULPI_SCRATCH_REGISTER(i), 0xbe);
+ }
+ }
+
+err_ioremap:
+ spin_unlock_irqrestore(&tll->lock, flags);
+ iounmap(base);
+ pm_runtime_put_sync(dev);
+ tll_pdev = pdev;
+ if (!ret)
+ goto end;
+ pm_runtime_disable(dev);
+
+err_usbtll_p2_fck:
+ clk_put(tll->usbtll_p2_fck);
+
+err_usbtll_p1_fck:
+ clk_put(tll->usbtll_p1_fck);
+
+err_tll:
+ kfree(tll);
+
+end:
+ return ret;
+}
+
+/**
+ * usbtll_omap_remove - shutdown processing for UHH & TLL HCDs
+ * @pdev: USB Host Controller being removed
+ *
+ * Reverses the effect of usbtll_omap_probe().
+ */
+static int __devexit usbtll_omap_remove(struct platform_device *pdev)
+{
+ struct usbtll_omap *tll = platform_get_drvdata(pdev);
+
+ clk_put(tll->usbtll_p2_fck);
+ clk_put(tll->usbtll_p1_fck);
+ pm_runtime_disable(&pdev->dev);
+ kfree(tll);
+ return 0;
+}
+
+static int usbtll_runtime_resume(struct device *dev)
+{
+ struct usbtll_omap *tll = dev_get_drvdata(dev);
+ struct usbtll_omap_platform_data *pdata = &tll->platdata;
+ unsigned long flags;
+
+ dev_dbg(dev, "usbtll_runtime_resume\n");
+
+ if (!pdata) {
+ dev_dbg(dev, "missing platform_data\n");
+ return -ENODEV;
+ }
+
+ spin_lock_irqsave(&tll->lock, flags);
+
+ if (is_ehci_tll_mode(pdata->port_mode[0]))
+ clk_enable(tll->usbtll_p1_fck);
+
+ if (is_ehci_tll_mode(pdata->port_mode[1]))
+ clk_enable(tll->usbtll_p2_fck);
+
+ spin_unlock_irqrestore(&tll->lock, flags);
+
+ return 0;
+}
+
+static int usbtll_runtime_suspend(struct device *dev)
+{
+ struct usbtll_omap *tll = dev_get_drvdata(dev);
+ struct usbtll_omap_platform_data *pdata = &tll->platdata;
+ unsigned long flags;
+
+ dev_dbg(dev, "usbtll_runtime_suspend\n");
+
+ if (!pdata) {
+ dev_dbg(dev, "missing platform_data\n");
+ return -ENODEV;
+ }
+
+ spin_lock_irqsave(&tll->lock, flags);
+
+ if (is_ehci_tll_mode(pdata->port_mode[0]))
+ clk_disable(tll->usbtll_p1_fck);
+
+ if (is_ehci_tll_mode(pdata->port_mode[1]))
+ clk_disable(tll->usbtll_p2_fck);
+
+ spin_unlock_irqrestore(&tll->lock, flags);
+
+ return 0;
+}
+
+static const struct dev_pm_ops usbtllomap_dev_pm_ops = {
+ .runtime_suspend = usbtll_runtime_suspend,
+ .runtime_resume = usbtll_runtime_resume,
+};
+
+static struct platform_driver usbtll_omap_driver = {
+ .driver = {
+ .name = (char *)usbtll_driver_name,
+ .owner = THIS_MODULE,
+ .pm = &usbtllomap_dev_pm_ops,
+ },
+ .remove = __exit_p(usbtll_omap_remove),
+};
+
+int omap_tll_enable(void)
+{
+ if (!tll_pdev) {
+ dev_dbg(&tll_pdev->dev, "missing platform_data\n");
+ return -ENODEV;
+ }
+ return pm_runtime_get_sync(&tll_pdev->dev);
+}
+EXPORT_SYMBOL_GPL(omap_tll_enable);
+
+int omap_tll_disable(void)
+{
+ if (!tll_pdev) {
+ dev_dbg(&tll_pdev->dev, "missing platform_data\n");
+ return -ENODEV;
+ }
+ return pm_runtime_put_sync(&tll_pdev->dev);
+}
+EXPORT_SYMBOL_GPL(omap_tll_disable);
+
+MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@xxxxxx>");
+MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("usb tll driver for TI OMAP EHCI and OHCI controllers");
+
+static int __init omap_usbtll_drvinit(void)
+{
+ return platform_driver_probe(&usbtll_omap_driver, usbtll_omap_probe);
+}
+
+/*
+ * init before usbhs core driver;
+ * The usbtll driver should be initialized before
+ * the usbhs core driver probe function is called.
+ */
+fs_initcall(omap_usbtll_drvinit);
+
+static void __exit omap_usbtll_drvexit(void)
+{
+ platform_driver_unregister(&usbtll_omap_driver);
+}
+module_exit(omap_usbtll_drvexit);
--
1.6.0.4
--
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