On Mon, Mar 19, 2012 at 3:11 PM, Shubhrajyoti <shubhrajyoti@xxxxxx> wrote:
> Hi Keshava,
> Some doubts / comments .
> On Monday 19 March 2012 12:18 PM, Keshava Munegowda wrote:
>> 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
> Nitpick : 2012
>> + * 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 */
> How are these values found? experimentally ?
yes,
>> +#define OMAP_USBTLL_REV1 0x00000015 /* OMAP3 */
>> +#define OMAP_USBTLL_REV2 0x00000004 /* OMAP4 */
>> +
> <snip>
>
> + 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;
> + }
>
>
> <Snip>
>
>
>> +
>> +err_ioremap:
>> + spin_unlock_irqrestore(&tll->lock, flags);
>> + iounmap(base);
>> + pm_runtime_put_sync(dev);
>> + tll_pdev = pdev;
>> + if (!ret)
>> + goto end;
> Did not understand this check as ret is made -ENODEV so this is always true?
> Am I missing something?
I need to check this.
>> + 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,
>> +};
>> +
> Also how about using runtime_pm_ops ?
Sorry I din't get this? what exact alternative are you suggesting here?
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