[Linux Media] [Video for Linux] [Linux Input] [Linux Audio Users] [Photo] [Yosemite News] [Yosemite Photos] [Free Online Dating] [Linux Kernel] [Linux SCSI] [Old Linux USB Devel Archive] [More Archives]
|
|
|
Re: [PATCH 2/3] usb: musb: dsps: add phy control logic to glue | |
| [Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] |
|
Hi,
On Tue, Jul 10, 2012 at 11:35 AM, Gupta, Ajay Kumar <ajay.gupta@xxxxxx> wrote:
> Hi,
>>
>> On Mon, Jul 9, 2012 at 7:18 PM, Damodar Santhapuri <x0132156@xxxxxx>
>> wrote:
>> > From: Ajay Kumar Gupta <ajay.gupta@xxxxxx>
>> >
>> > AM335x uses NOP transceiver driver and need to enable builtin PHY
>> > by writing into usb_ctrl register available in system control
>> > module register space. This is being added at musb glue driver
>> > layer untill a separate system control module driver is available.
>> >
>> > Signed-off-by: Ajay Kumar Gupta <ajay.gupta@xxxxxx>
>> > Signed-off-by: Damodar Santhapuri <x0132156@xxxxxx>
>> > ---
>> > arch/arm/mach-omap2/board-ti8168evm.c | 1 -
>> > arch/arm/mach-omap2/omap_phy_internal.c | 35 ------------
>> > arch/arm/plat-omap/include/plat/usb.h | 5 +-
>> > drivers/usb/musb/musb_dsps.c | 88
>> +++++++++++++++++++++++++------
>> > 4 files changed, 74 insertions(+), 55 deletions(-)
>> >
>> > diff --git a/arch/arm/mach-omap2/board-ti8168evm.c b/arch/arm/mach-
>> omap2/board-ti8168evm.c
>> > index d4c8392..0c7c098 100644
>> > --- a/arch/arm/mach-omap2/board-ti8168evm.c
>> > +++ b/arch/arm/mach-omap2/board-ti8168evm.c
>> > @@ -26,7 +26,6 @@
>> > #include <plat/usb.h>
>> >
>> > static struct omap_musb_board_data musb_board_data = {
>> > - .set_phy_power = ti81xx_musb_phy_power,
>> > .interface_type = MUSB_INTERFACE_ULPI,
>> > .mode = MUSB_OTG,
>> > .power = 500,
>> > diff --git a/arch/arm/mach-omap2/omap_phy_internal.c b/arch/arm/mach-
>> omap2/omap_phy_internal.c
>> > index d52651a..d80bb16 100644
>> > --- a/arch/arm/mach-omap2/omap_phy_internal.c
>> > +++ b/arch/arm/mach-omap2/omap_phy_internal.c
>> > @@ -254,38 +254,3 @@ void am35x_set_mode(u8 musb_mode)
>> >
>> > omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2);
>> > }
>> > -
>> > -void ti81xx_musb_phy_power(u8 on)
>> > -{
>> > - void __iomem *scm_base = NULL;
>> > - u32 usbphycfg;
>> > -
>> > - scm_base = ioremap(TI81XX_SCM_BASE, SZ_2K);
>> > - if (!scm_base) {
>> > - pr_err("system control module ioremap failed\n");
>> > - return;
>> > - }
>> > -
>> > - usbphycfg = __raw_readl(scm_base + USBCTRL0);
>> > -
>> > - if (on) {
>> > - if (cpu_is_ti816x()) {
>> > - usbphycfg |= TI816X_USBPHY0_NORMAL_MODE;
>> > - usbphycfg &= ~TI816X_USBPHY_REFCLK_OSC;
>> > - } else if (cpu_is_ti814x()) {
>> > - usbphycfg &= ~(USBPHY_CM_PWRDN |
>> USBPHY_OTG_PWRDN
>> > - | USBPHY_DPINPUT | USBPHY_DMINPUT);
>> > - usbphycfg |= (USBPHY_OTGVDET_EN |
>> USBPHY_OTGSESSEND_EN
>> > - | USBPHY_DPOPBUFCTL |
>> USBPHY_DMOPBUFCTL);
>> > - }
>> > - } else {
>> > - if (cpu_is_ti816x())
>> > - usbphycfg &= ~TI816X_USBPHY0_NORMAL_MODE;
>> > - else if (cpu_is_ti814x())
>> > - usbphycfg |= USBPHY_CM_PWRDN |
>> USBPHY_OTG_PWRDN;
>> > -
>> > - }
>> > - __raw_writel(usbphycfg, scm_base + USBCTRL0);
>> > -
>> > - iounmap(scm_base);
>> > -}
>> > diff --git a/arch/arm/plat-omap/include/plat/usb.h b/arch/arm/plat-
>> omap/include/plat/usb.h
>> > index 548a4c8..c2aa4ae 100644
>> > --- a/arch/arm/plat-omap/include/plat/usb.h
>> > +++ b/arch/arm/plat-omap/include/plat/usb.h
>> > @@ -95,7 +95,6 @@ extern void am35x_musb_reset(void);
>> > extern void am35x_musb_phy_power(u8 on);
>> > extern void am35x_musb_clear_irq(void);
>> > extern void am35x_set_mode(u8 musb_mode);
>> > -extern void ti81xx_musb_phy_power(u8 on);
>> >
>> > /* AM35x */
>> > /* USB 2.0 PHY Control */
>> > @@ -120,8 +119,8 @@ extern void ti81xx_musb_phy_power(u8 on);
>> > #define CONF2_DATPOL (1 << 1)
>> >
>> > /* TI81XX specific definitions */
>> > -#define USBCTRL0 0x620
>> > -#define USBSTAT0 0x624
>> > +#define MUSB_USBSS_REV_816X 0x9
>> > +#define MUSB_USBSS_REV_814X 0xb
>> >
>> > /* TI816X PHY controls bits */
>> > #define TI816X_USBPHY0_NORMAL_MODE (1 << 0)
>> > diff --git a/drivers/usb/musb/musb_dsps.c
>> b/drivers/usb/musb/musb_dsps.c
>> > index 494772f..f7271c3 100644
>> > --- a/drivers/usb/musb/musb_dsps.c
>> > +++ b/drivers/usb/musb/musb_dsps.c
>> > @@ -115,9 +115,46 @@ struct dsps_glue {
>> > struct platform_device *musb; /* child musb pdev */
>> > const struct dsps_musb_wrapper *wrp; /* wrapper register
>> offsets */
>> > struct timer_list timer; /* otg_workaround timer */
>> > + u32 __iomem *usb_ctrl;
>> > + u8 usbss_rev;
>> > };
>> >
>> > /**
>> > + * musb_dsps_phy_control - phy on/off
>> > + * @glue: struct dsps_glue *
>> > + * @on: flag for phy to be switched on or off
>> > + *
>> > + * This is to enable the PHY using usb_ctrl register in system
>> control
>> > + * module space.
>> > + *
>> > + * XXX: This function will be removed once we have a seperate driver
>> for
>> %s/seperate/separate
>> > + * control module
>> > + */
>> > +static void musb_dsps_phy_control(struct dsps_glue *glue, u8 on)
>> > +{
>> > + u32 usbphycfg;
>> > +
>> > + usbphycfg = __raw_readl(glue->usb_ctrl);
>>
>> How about using readl instead of __raw_readl here and below?
>> > +
>> > + if (on) {
>> > + if (glue->usbss_rev == MUSB_USBSS_REV_816X) {
>> > + usbphycfg |= TI816X_USBPHY0_NORMAL_MODE;
>> > + usbphycfg &= ~TI816X_USBPHY_REFCLK_OSC;
>> > + } else if (glue->usbss_rev == MUSB_USBSS_REV_814X) {
>> > + usbphycfg &= ~(USBPHY_CM_PWRDN |
>> USBPHY_OTG_PWRDN
>> > + | USBPHY_DPINPUT | USBPHY_DMINPUT);
>> > + usbphycfg |= (USBPHY_OTGVDET_EN |
>> USBPHY_OTGSESSEND_EN
>> > + | USBPHY_DPOPBUFCTL |
>> USBPHY_DMOPBUFCTL);
>> > + }
>> > + } else {
>> > + if (glue->usbss_rev == MUSB_USBSS_REV_816X)
>> > + usbphycfg &= ~TI816X_USBPHY0_NORMAL_MODE;
>> > + else if (glue->usbss_rev == MUSB_USBSS_REV_814X)
>> > + usbphycfg |= USBPHY_CM_PWRDN |
>> USBPHY_OTG_PWRDN;
>> > + }
>> > + __raw_writel(usbphycfg, glue->usb_ctrl);
>> only writel()?
>> > +}
>> > +/**
>> > * dsps_musb_enable - enable interrupts
>> > */
>> > static void dsps_musb_enable(struct musb *musb)
>> > @@ -363,11 +400,9 @@ static irqreturn_t dsps_interrupt(int irq, void
>> *hci)
>> > static int dsps_musb_init(struct musb *musb)
>> > {
>> > struct device *dev = musb->controller;
>> > - struct musb_hdrc_platform_data *plat = dev->platform_data;
>> > struct platform_device *pdev = to_platform_device(dev-
>> >parent);
>> > struct dsps_glue *glue = platform_get_drvdata(pdev);
>> > const struct dsps_musb_wrapper *wrp = glue->wrp;
>> > - struct omap_musb_board_data *data = plat->board_data;
>> > void __iomem *reg_base = musb->ctrl_base;
>> > u32 rev, val;
>> > int status;
>> > @@ -395,8 +430,7 @@ static int dsps_musb_init(struct musb *musb)
>> > dsps_writel(reg_base, wrp->control, (1 << wrp->reset));
>> >
>> > /* Start the on-chip PHY and its PLL. */
>> > - if (data->set_phy_power)
>> > - data->set_phy_power(1);
>> > + musb_dsps_phy_control(glue, 1);
>> >
>> > musb->isr = dsps_interrupt;
>> >
>> > @@ -418,8 +452,6 @@ err0:
>> > static int dsps_musb_exit(struct musb *musb)
>> > {
>> > struct device *dev = musb->controller;
>> > - struct musb_hdrc_platform_data *plat = dev->platform_data;
>> > - struct omap_musb_board_data *data = plat->board_data;
>> > struct platform_device *pdev = to_platform_device(dev-
>> >parent);
>> > struct dsps_glue *glue = platform_get_drvdata(pdev);
>> >
>> > @@ -427,8 +459,7 @@ static int dsps_musb_exit(struct musb *musb)
>> > del_timer_sync(&glue->timer);
>> >
>> > /* Shutdown the on-chip PHY and its PLL. */
>> > - if (data->set_phy_power)
>> > - data->set_phy_power(0);
>> > + musb_dsps_phy_control(glue, 0);
>> >
>> > /* NOP driver needs change if supporting dual instance */
>> > usb_put_phy(musb->xceiv);
>> > @@ -460,6 +491,22 @@ static int __devinit
>> dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
>> > char res_name[10];
>> > int ret;
>> >
>> > + /* get memory resource for usb control register */
>> > + sprintf(res_name, "usb_ctrl%d", id);
>> > + res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
>> res_name);
>> Avoid getting resource by name.. With dt, you wont be able to do
>> those..
>
> When we are completely on DT then this would anyways go and we can
> get these resource data for each usb port from DT APIs.
Even with dt, you will still get the resources using
platform_get_resource() API's.. So why not have it that way from the
beginning itself..
Thanks
Kishon
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
[Linux Media] [Video for Linux] [Linux Input] [Linux Audio Users] [Photo] [Yosemite News] [Yosemite Photos] [Free Online Dating] [Linux Kernel] [Linux SCSI] [Old Linux USB Devel Archive] [More Archives]
 |
 |