[PATCH v9 01/13] usb: musb: dsps: add phy control logic to glue
Felipe Balbi
balbi at ti.com
Fri Aug 31 22:23:43 EST 2012
Hi,
On Fri, Aug 31, 2012 at 04:39:47PM +0530, Ravi Babu wrote:
> From: Santhapuri, Damodar <damodar.santhapuri at ti.com>
>
> 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 at ti.com>
> Signed-off-by: Santhapuri, Damodar <damodar.santhapuri at ti.com>
> Signed-off-by: Ravi Babu <ravibabu at ti.com>
Kishon, you were adding a real phy driver for OMAP's internal phy logic
on one of your patches and I believe this will conflict with your
changes, right ?
How does this look to you ? Is this at least correct ? I suppose the
correct way would be to actually have the system control module driver
which we have been waiting, right ?
> ---
> 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 | 87 +++++++++++++++++++++++++------
> 4 files changed, 73 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 84d8181..960258d 100644
> --- a/drivers/usb/musb/musb_dsps.c
> +++ b/drivers/usb/musb/musb_dsps.c
> @@ -116,9 +116,46 @@ 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
> + * control module
> + */
> +static void musb_dsps_phy_control(struct dsps_glue *glue, u8 on)
> +{
> + u32 usbphycfg;
> +
> + usbphycfg = __raw_readl(glue->usb_ctrl);
> +
> + 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);
> +}
> +/**
> * dsps_musb_enable - enable interrupts
> */
> static void dsps_musb_enable(struct musb *musb)
> @@ -356,11 +393,9 @@ 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;
> @@ -387,8 +422,7 @@ 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;
>
> @@ -410,16 +444,13 @@ 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);
>
> 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);
> @@ -451,6 +482,21 @@ 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 */
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 2 * id + 2);
> + if (!res) {
> + dev_err(dev, "%s get mem resource failed\n", res_name);
> + ret = -ENODEV;
> + goto err0;
> + }
> +
> + glue->usb_ctrl = devm_request_and_ioremap(&pdev->dev, res);
> + if (glue->usb_ctrl == NULL) {
> + dev_err(dev, "Failed to obtain usb_ctrl%d memory\n", id);
> + ret = -ENODEV;
> + goto err0;
> + }
> +
> /* get memory resource */
> sprintf(res_name, "musb%d", id);
> res = platform_get_resource_byname(pdev, IORESOURCE_MEM, res_name);
> @@ -529,6 +575,7 @@ static int __devinit dsps_probe(struct platform_device *pdev)
> (struct dsps_musb_wrapper *)id->driver_data;
> struct dsps_glue *glue;
> struct resource *iomem;
> + u32 __iomem *usbss;
> int ret;
>
> /* allocate glue */
> @@ -547,6 +594,13 @@ static int __devinit dsps_probe(struct platform_device *pdev)
> goto err1;
> }
>
> + usbss = devm_request_and_ioremap(&pdev->dev, iomem);
> + if (usbss == NULL) {
> + dev_err(&pdev->dev, "Failed to obtain usbss memory\n");
> + ret = -ENODEV;
> + goto err1;
> + }
> +
> glue->dev = &pdev->dev;
>
> glue->wrp = kmemdup(wrp, sizeof(*wrp), GFP_KERNEL);
> @@ -573,6 +627,9 @@ static int __devinit dsps_probe(struct platform_device *pdev)
> goto err3;
> }
>
> + /* read the usbss revision register */
> + glue->usbss_rev = __raw_readl(usbss);
> +
> return 0;
>
> err3:
> @@ -603,24 +660,22 @@ static int __devexit dsps_remove(struct platform_device *pdev)
> #ifdef CONFIG_PM_SLEEP
> static int dsps_suspend(struct device *dev)
> {
> - 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);
>
> /* Shutdown the on-chip PHY and its PLL. */
> - if (data->set_phy_power)
> - data->set_phy_power(0);
> + musb_dsps_phy_control(glue, 0);
>
> return 0;
> }
>
> static int dsps_resume(struct device *dev)
> {
> - 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);
>
> /* Start the on-chip PHY and its PLL. */
> - if (data->set_phy_power)
> - data->set_phy_power(1);
> + musb_dsps_phy_control(glue, 1);
>
> return 0;
> }
> --
> 1.7.0.4
>
--
balbi
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