Re: [PATCH v2] USB: PHY: Re-organize Tegra USB PHY driver

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Hi,

On Thu, Sep 13, 2012 at 12:32 PM, Venu Byravarasu
<vbyravarasu@xxxxxxxxxx> wrote:
> NVIDIA produces several Tegra SoCs viz Tegra20, Tegra30 etc.
> In order to support USB PHY drivers on these SoCs, existing
> PHY driver is split into SoC agnostic common USB PHY driver
> and Tegra20-specific USB phy driver. This will facilitate
> easy addition and deletion of phy drivers for Tegra SoCs.
>
> Signed-off-by: Venu Byravarasu <vbyravarasu@xxxxxxxxxx>
> ---
> delta from v1:
>
> 1. Added two new phy_open functions, which will be called based
> on the phy type being used.
> 2. Moved function pointer initialization to these two functions.
> 3. Renamed usb_phy_ops to tegra_usb_phy_ops.
> 4. Moved tegra_freq_table from header to tegra_usb_phy.c
>
>  drivers/usb/host/ehci-tegra.c                      |   24 +-
>  drivers/usb/phy/Makefile                           |    1 +
>  .../usb/phy/{tegra_usb_phy.c => tegra2_usb_phy.c}  |  421 +++----------
>  drivers/usb/phy/tegra2_usb_phy.h                   |  140 ++++
>  drivers/usb/phy/tegra_usb_phy.c                    |  688 +-------------------
>  include/linux/usb/tegra_usb_phy.h                  |   34 +-
>  6 files changed, 296 insertions(+), 1012 deletions(-)
>  copy drivers/usb/phy/{tegra_usb_phy.c => tegra2_usb_phy.c} (53%)
>  create mode 100644 drivers/usb/phy/tegra2_usb_phy.h
>
> diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
> index 6223d17..15af372 100644
> --- a/drivers/usb/host/ehci-tegra.c
> +++ b/drivers/usb/host/ehci-tegra.c
> @@ -618,6 +618,9 @@ static int tegra_ehci_probe(struct platform_device *pdev)
>         int err = 0;
>         int irq;
>         int instance = pdev->id;
> +       struct device_node *np = pdev->dev.of_node;
> +       struct phy_params params;
> +       int phy_type;
>
>         pdata = pdev->dev.platform_data;
>         if (!pdata) {
> @@ -701,14 +704,27 @@ static int tegra_ehci_probe(struct platform_device *pdev)
>                         break;
>                 default:
>                         err = -ENODEV;
> -                       dev_err(&pdev->dev, "unknown usb instance\n");
> +                       dev_err(&pdev->dev, "unknown usb inst:%d\n", instance);
>                         goto fail_io;
>                 }
>         }

It's better you have the below code under *if (np)*, since both device
node and pdata co-exist for you.
>
> +       phy_type = of_property_match_string(np, "phy_type", "utmi");
> +       if (phy_type >= 0)
> +               params.type = TEGRA_USB_PHY_TYPE_UTMI;
> +       else {
> +               phy_type = of_property_match_string(np, "phy_type", "ulpi");
> +               if (phy_type >= 0)
> +                       params.type = TEGRA_USB_PHY_TYPE_ULPI;
> +               else
> +                       params.type = TEGRA_USB_PHY_TYPE_INVALID;
> +       }
> +
> +       params.mode = TEGRA_USB_PHY_MODE_HOST;
> +       params.config = pdata->phy_config;

doesn't this above line result in abort when you are doing a dt boot?
> +
>         tegra->phy = tegra_usb_phy_open(&pdev->dev, instance, hcd->regs,
> -                                       pdata->phy_config,
> -                                       TEGRA_USB_PHY_MODE_HOST);
> +               &params);
>         if (IS_ERR(tegra->phy)) {
>                 dev_err(&pdev->dev, "Failed to open USB phy\n");
>                 err = -ENXIO;
> @@ -744,7 +760,7 @@ static int tegra_ehci_probe(struct platform_device *pdev)
>
>         err = usb_add_hcd(hcd, irq, IRQF_SHARED);
>         if (err) {
> -               dev_err(&pdev->dev, "Failed to add USB HCD\n");
> +               dev_err(&pdev->dev, "usb_add_hcd failed with err 0x%x\n", err);
>                 goto fail;
>         }
>
> diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
> index b069f29..21872e1 100644
> --- a/drivers/usb/phy/Makefile
> +++ b/drivers/usb/phy/Makefile
> @@ -8,3 +8,4 @@ obj-$(CONFIG_OMAP_USB2)                 += omap-usb2.o
>  obj-$(CONFIG_USB_ISP1301)              += isp1301.o
>  obj-$(CONFIG_MV_U3D_PHY)               += mv_u3d_phy.o
>  obj-$(CONFIG_USB_EHCI_TEGRA)   += tegra_usb_phy.o
> +obj-$(CONFIG_USB_EHCI_TEGRA)   += tegra2_usb_phy.o
> diff --git a/drivers/usb/phy/tegra_usb_phy.c b/drivers/usb/phy/tegra2_usb_phy.c
> similarity index 53%
> copy from drivers/usb/phy/tegra_usb_phy.c
> copy to drivers/usb/phy/tegra2_usb_phy.c
> index 987116f..4896a4d 100644
> --- a/drivers/usb/phy/tegra_usb_phy.c
> +++ b/drivers/usb/phy/tegra2_usb_phy.c
> @@ -1,9 +1,11 @@
>  /*
>   * Copyright (C) 2010 Google, Inc.
> + * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
>   *
>   * Author:
>   *     Erik Gilling <konkers@xxxxxxxxxx>
>   *     Benoit Goby <benoit@xxxxxxxxxxx>
> + *  Venu Byravarasu <vbyravarasu@xxxxxxxxxx>
>   *
>   * This software is licensed under the terms of the GNU General Public
>   * License version 2, as published by the Free Software Foundation, and
> @@ -31,187 +33,18 @@
>  #include <linux/usb/tegra_usb_phy.h>
>  #include <mach/iomap.h>
>
> -#define ULPI_VIEWPORT          0x170
> -
> -#define USB_PORTSC1            0x184
> -#define   USB_PORTSC1_PTS(x)   (((x) & 0x3) << 30)
> -#define   USB_PORTSC1_PSPD(x)  (((x) & 0x3) << 26)
> -#define   USB_PORTSC1_PHCD     (1 << 23)
> -#define   USB_PORTSC1_WKOC     (1 << 22)
> -#define   USB_PORTSC1_WKDS     (1 << 21)
> -#define   USB_PORTSC1_WKCN     (1 << 20)
> -#define   USB_PORTSC1_PTC(x)   (((x) & 0xf) << 16)
> -#define   USB_PORTSC1_PP       (1 << 12)
> -#define   USB_PORTSC1_SUSP     (1 << 7)
> -#define   USB_PORTSC1_PE       (1 << 2)
> -#define   USB_PORTSC1_CCS      (1 << 0)
> -
> -#define USB_SUSP_CTRL          0x400
> -#define   USB_WAKE_ON_CNNT_EN_DEV      (1 << 3)
> -#define   USB_WAKE_ON_DISCON_EN_DEV    (1 << 4)
> -#define   USB_SUSP_CLR         (1 << 5)
> -#define   USB_PHY_CLK_VALID    (1 << 7)
> -#define   UTMIP_RESET                  (1 << 11)
> -#define   UHSIC_RESET                  (1 << 11)
> -#define   UTMIP_PHY_ENABLE             (1 << 12)
> -#define   ULPI_PHY_ENABLE      (1 << 13)
> -#define   USB_SUSP_SET         (1 << 14)
> -#define   USB_WAKEUP_DEBOUNCE_COUNT(x) (((x) & 0x7) << 16)
> -
> -#define USB1_LEGACY_CTRL       0x410
> -#define   USB1_NO_LEGACY_MODE                  (1 << 0)
> -#define   USB1_VBUS_SENSE_CTL_MASK             (3 << 1)
> -#define   USB1_VBUS_SENSE_CTL_VBUS_WAKEUP      (0 << 1)
> -#define   USB1_VBUS_SENSE_CTL_AB_SESS_VLD_OR_VBUS_WAKEUP \
> -                                               (1 << 1)
> -#define   USB1_VBUS_SENSE_CTL_AB_SESS_VLD      (2 << 1)
> -#define   USB1_VBUS_SENSE_CTL_A_SESS_VLD       (3 << 1)
> -
> -#define ULPI_TIMING_CTRL_0     0x424
> -#define   ULPI_OUTPUT_PINMUX_BYP       (1 << 10)
> -#define   ULPI_CLKOUT_PINMUX_BYP       (1 << 11)
> -
> -#define ULPI_TIMING_CTRL_1     0x428
> -#define   ULPI_DATA_TRIMMER_LOAD       (1 << 0)
> -#define   ULPI_DATA_TRIMMER_SEL(x)     (((x) & 0x7) << 1)
> -#define   ULPI_STPDIRNXT_TRIMMER_LOAD  (1 << 16)
> -#define   ULPI_STPDIRNXT_TRIMMER_SEL(x)        (((x) & 0x7) << 17)
> -#define   ULPI_DIR_TRIMMER_LOAD                (1 << 24)
> -#define   ULPI_DIR_TRIMMER_SEL(x)      (((x) & 0x7) << 25)
> -
> -#define UTMIP_PLL_CFG1         0x804
> -#define   UTMIP_XTAL_FREQ_COUNT(x)             (((x) & 0xfff) << 0)
> -#define   UTMIP_PLLU_ENABLE_DLY_COUNT(x)       (((x) & 0x1f) << 27)
> -
> -#define UTMIP_XCVR_CFG0                0x808
> -#define   UTMIP_XCVR_SETUP(x)                  (((x) & 0xf) << 0)
> -#define   UTMIP_XCVR_LSRSLEW(x)                        (((x) & 0x3) << 8)
> -#define   UTMIP_XCVR_LSFSLEW(x)                        (((x) & 0x3) << 10)
> -#define   UTMIP_FORCE_PD_POWERDOWN             (1 << 14)
> -#define   UTMIP_FORCE_PD2_POWERDOWN            (1 << 16)
> -#define   UTMIP_FORCE_PDZI_POWERDOWN           (1 << 18)
> -#define   UTMIP_XCVR_HSSLEW_MSB(x)             (((x) & 0x7f) << 25)
> -
> -#define UTMIP_BIAS_CFG0                0x80c
> -#define   UTMIP_OTGPD                  (1 << 11)
> -#define   UTMIP_BIASPD                 (1 << 10)
> -
> -#define UTMIP_HSRX_CFG0                0x810
> -#define   UTMIP_ELASTIC_LIMIT(x)       (((x) & 0x1f) << 10)
> -#define   UTMIP_IDLE_WAIT(x)           (((x) & 0x1f) << 15)
> -
> -#define UTMIP_HSRX_CFG1                0x814
> -#define   UTMIP_HS_SYNC_START_DLY(x)   (((x) & 0x1f) << 1)
> -
> -#define UTMIP_TX_CFG0          0x820
> -#define   UTMIP_FS_PREABMLE_J          (1 << 19)
> -#define   UTMIP_HS_DISCON_DISABLE      (1 << 8)
> -
> -#define UTMIP_MISC_CFG0                0x824
> -#define   UTMIP_DPDM_OBSERVE           (1 << 26)
> -#define   UTMIP_DPDM_OBSERVE_SEL(x)    (((x) & 0xf) << 27)
> -#define   UTMIP_DPDM_OBSERVE_SEL_FS_J  UTMIP_DPDM_OBSERVE_SEL(0xf)
> -#define   UTMIP_DPDM_OBSERVE_SEL_FS_K  UTMIP_DPDM_OBSERVE_SEL(0xe)
> -#define   UTMIP_DPDM_OBSERVE_SEL_FS_SE1 UTMIP_DPDM_OBSERVE_SEL(0xd)
> -#define   UTMIP_DPDM_OBSERVE_SEL_FS_SE0 UTMIP_DPDM_OBSERVE_SEL(0xc)
> -#define   UTMIP_SUSPEND_EXIT_ON_EDGE   (1 << 22)
> -
> -#define UTMIP_MISC_CFG1                0x828
> -#define   UTMIP_PLL_ACTIVE_DLY_COUNT(x)        (((x) & 0x1f) << 18)
> -#define   UTMIP_PLLU_STABLE_COUNT(x)   (((x) & 0xfff) << 6)
> -
> -#define UTMIP_DEBOUNCE_CFG0    0x82c
> -#define   UTMIP_BIAS_DEBOUNCE_A(x)     (((x) & 0xffff) << 0)
> -
> -#define UTMIP_BAT_CHRG_CFG0    0x830
> -#define   UTMIP_PD_CHRG                        (1 << 0)
> -
> -#define UTMIP_SPARE_CFG0       0x834
> -#define   FUSE_SETUP_SEL               (1 << 3)
> -
> -#define UTMIP_XCVR_CFG1                0x838
> -#define   UTMIP_FORCE_PDDISC_POWERDOWN (1 << 0)
> -#define   UTMIP_FORCE_PDCHRP_POWERDOWN (1 << 2)
> -#define   UTMIP_FORCE_PDDR_POWERDOWN   (1 << 4)
> -#define   UTMIP_XCVR_TERM_RANGE_ADJ(x) (((x) & 0xf) << 18)
> -
> -#define UTMIP_BIAS_CFG1                0x83c
> -#define   UTMIP_BIAS_PDTRK_COUNT(x)    (((x) & 0x1f) << 3)
> +#include "tegra2_usb_phy.h"
>
>  static DEFINE_SPINLOCK(utmip_pad_lock);
>  static int utmip_pad_count;
>
> -struct tegra_xtal_freq {
> -       int freq;
> -       u8 enable_delay;
> -       u8 stable_count;
> -       u8 active_delay;
> -       u8 xtal_freq_count;
> -       u16 debounce;
> -};
> -
> -static const struct tegra_xtal_freq tegra_freq_table[] = {
> -       {
> -               .freq = 12000000,
> -               .enable_delay = 0x02,
> -               .stable_count = 0x2F,
> -               .active_delay = 0x04,
> -               .xtal_freq_count = 0x76,
> -               .debounce = 0x7530,
> -       },
> -       {
> -               .freq = 13000000,
> -               .enable_delay = 0x02,
> -               .stable_count = 0x33,
> -               .active_delay = 0x05,
> -               .xtal_freq_count = 0x7F,
> -               .debounce = 0x7EF4,
> -       },
> -       {
> -               .freq = 19200000,
> -               .enable_delay = 0x03,
> -               .stable_count = 0x4B,
> -               .active_delay = 0x06,
> -               .xtal_freq_count = 0xBB,
> -               .debounce = 0xBB80,
> -       },
> -       {
> -               .freq = 26000000,
> -               .enable_delay = 0x04,
> -               .stable_count = 0x66,
> -               .active_delay = 0x09,
> -               .xtal_freq_count = 0xFE,
> -               .debounce = 0xFDE8,
> -       },
> -};
> -
> -static struct tegra_utmip_config utmip_default[] = {
> -       [0] = {
> -               .hssync_start_delay = 9,
> -               .idle_wait_delay = 17,
> -               .elastic_limit = 16,
> -               .term_range_adj = 6,
> -               .xcvr_setup = 9,
> -               .xcvr_lsfslew = 1,
> -               .xcvr_lsrslew = 1,
> -       },
> -       [2] = {
> -               .hssync_start_delay = 9,
> -               .idle_wait_delay = 17,
> -               .elastic_limit = 16,
> -               .term_range_adj = 6,
> -               .xcvr_setup = 9,
> -               .xcvr_lsfslew = 2,
> -               .xcvr_lsrslew = 2,
> -       },
> -};
> -
>  static inline bool phy_is_ulpi(struct tegra_usb_phy *phy)
>  {
> -       return (phy->instance == 1);
> +       return (phy->type == TEGRA_USB_PHY_TYPE_ULPI);
>  }
>
> -static int utmip_pad_open(struct tegra_usb_phy *phy)
> +
> +static int tegra2_utmip_pad_open(struct tegra_usb_phy *phy)
>  {
>         phy->pad_clk = clk_get_sys("utmip-pad", NULL);
>         if (IS_ERR(phy->pad_clk)) {
> @@ -232,14 +65,14 @@ static int utmip_pad_open(struct tegra_usb_phy *phy)
>         return 0;
>  }
>
> -static void utmip_pad_close(struct tegra_usb_phy *phy)
> +static void tegra2_utmip_pad_close(struct tegra_usb_phy *phy)
>  {
>         if (phy->instance != 0)
>                 iounmap(phy->pad_regs);
>         clk_put(phy->pad_clk);
>  }
>
> -static void utmip_pad_power_on(struct tegra_usb_phy *phy)
> +static void tegra2_utmip_pad_power_on(struct tegra_usb_phy *phy)
>  {
>         unsigned long val, flags;
>         void __iomem *base = phy->pad_regs;
> @@ -259,7 +92,7 @@ static void utmip_pad_power_on(struct tegra_usb_phy *phy)
>         clk_disable_unprepare(phy->pad_clk);
>  }
>
> -static int utmip_pad_power_off(struct tegra_usb_phy *phy)
> +static int tegra2_utmip_pad_power_off(struct tegra_usb_phy *phy)
>  {
>         unsigned long val, flags;
>         void __iomem *base = phy->pad_regs;
> @@ -289,6 +122,7 @@ static int utmip_pad_power_off(struct tegra_usb_phy *phy)
>  static int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
>  {
>         unsigned long timeout = 2000;
> +
>         do {
>                 if ((readl(reg) & mask) == result)
>                         return 0;
> @@ -298,7 +132,7 @@ static int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
>         return -1;
>  }
>
> -static void utmi_phy_clk_disable(struct tegra_usb_phy *phy)
> +static void tegra2_utmi_phy_clk_disable(struct tegra_usb_phy *phy)
>  {
>         unsigned long val;
>         void __iomem *base = phy->regs;
> @@ -325,7 +159,7 @@ static void utmi_phy_clk_disable(struct tegra_usb_phy *phy)
>                 pr_err("%s: timeout waiting for phy to stabilize\n", __func__);
>  }
>
> -static void utmi_phy_clk_enable(struct tegra_usb_phy *phy)
> +static void tegra2_utmi_phy_clk_enable(struct tegra_usb_phy *phy)
>  {
>         unsigned long val;
>         void __iomem *base = phy->regs;
> @@ -353,7 +187,7 @@ static void utmi_phy_clk_enable(struct tegra_usb_phy *phy)
>                 pr_err("%s: timeout waiting for phy to stabilize\n", __func__);
>  }
>
> -static int utmi_phy_power_on(struct tegra_usb_phy *phy)
> +static int tegra2_utmi_phy_power_on(struct tegra_usb_phy *phy)
>  {
>         unsigned long val;
>         void __iomem *base = phy->regs;
> @@ -411,7 +245,7 @@ static int utmi_phy_power_on(struct tegra_usb_phy *phy)
>                 writel(val, base + USB_SUSP_CTRL);
>         }
>
> -       utmip_pad_power_on(phy);
> +       tegra2_utmip_pad_power_on(phy);
>
>         val = readl(base + UTMIP_XCVR_CFG0);
>         val &= ~(UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN |
> @@ -468,7 +302,7 @@ static int utmi_phy_power_on(struct tegra_usb_phy *phy)
>                 writel(val, base + USB_SUSP_CTRL);
>         }
>
> -       utmi_phy_clk_enable(phy);
> +       tegra2_utmi_phy_clk_enable(phy);
>
>         if (phy->instance == 2) {
>                 val = readl(base + USB_PORTSC1);
> @@ -479,12 +313,12 @@ static int utmi_phy_power_on(struct tegra_usb_phy *phy)
>         return 0;
>  }
>
> -static int utmi_phy_power_off(struct tegra_usb_phy *phy)
> +static int tegra2_utmi_phy_power_off(struct tegra_usb_phy *phy)
>  {
>         unsigned long val;
>         void __iomem *base = phy->regs;
>
> -       utmi_phy_clk_disable(phy);
> +       tegra2_utmi_phy_clk_disable(phy);
>
>         if (phy->mode == TEGRA_USB_PHY_MODE_DEVICE) {
>                 val = readl(base + USB_SUSP_CTRL);
> @@ -511,10 +345,10 @@ static int utmi_phy_power_off(struct tegra_usb_phy *phy)
>                UTMIP_FORCE_PDDR_POWERDOWN;
>         writel(val, base + UTMIP_XCVR_CFG1);
>
> -       return utmip_pad_power_off(phy);
> +       return tegra2_utmip_pad_power_off(phy);
>  }
>
> -static void utmi_phy_preresume(struct tegra_usb_phy *phy)
> +static void tegra2_utmi_phy_preresume(struct tegra_usb_phy *phy)
>  {
>         unsigned long val;
>         void __iomem *base = phy->regs;
> @@ -524,7 +358,7 @@ static void utmi_phy_preresume(struct tegra_usb_phy *phy)
>         writel(val, base + UTMIP_TX_CFG0);
>  }
>
> -static void utmi_phy_postresume(struct tegra_usb_phy *phy)
> +static void tegra2_utmi_phy_postresume(struct tegra_usb_phy *phy)
>  {
>         unsigned long val;
>         void __iomem *base = phy->regs;
> @@ -534,7 +368,7 @@ static void utmi_phy_postresume(struct tegra_usb_phy *phy)
>         writel(val, base + UTMIP_TX_CFG0);
>  }
>
> -static void utmi_phy_restore_start(struct tegra_usb_phy *phy,
> +static void tegra2_utmi_phy_restore_start(struct tegra_usb_phy *phy,
>                                    enum tegra_usb_phy_port_speed port_speed)
>  {
>         unsigned long val;
> @@ -555,7 +389,7 @@ static void utmi_phy_restore_start(struct tegra_usb_phy *phy,
>         udelay(10);
>  }
>
> -static void utmi_phy_restore_end(struct tegra_usb_phy *phy)
> +static void tegra2_utmi_phy_restore_end(struct tegra_usb_phy *phy)
>  {
>         unsigned long val;
>         void __iomem *base = phy->regs;
> @@ -566,7 +400,7 @@ static void utmi_phy_restore_end(struct tegra_usb_phy *phy)
>         udelay(10);
>  }
>
> -static int ulpi_phy_power_on(struct tegra_usb_phy *phy)
> +static int tegra2_ulpi_phy_power_on(struct tegra_usb_phy *phy)
>  {
>         int ret;
>         unsigned long val;
> @@ -635,7 +469,7 @@ static int ulpi_phy_power_on(struct tegra_usb_phy *phy)
>         return 0;
>  }
>
> -static int ulpi_phy_power_off(struct tegra_usb_phy *phy)
> +static int tegra2_ulpi_phy_power_off(struct tegra_usb_phy *phy)
>  {
>         unsigned long val;
>         void __iomem *base = phy->regs;
> @@ -652,187 +486,80 @@ static int ulpi_phy_power_off(struct tegra_usb_phy *phy)
>         return gpio_direction_output(config->reset_gpio, 0);
>  }
>
> -static int     tegra_phy_init(struct usb_phy *x)
> -{
> -       struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
> -       struct tegra_ulpi_config *ulpi_config;
> -       int err;
> -
> -       if (phy_is_ulpi(phy)) {
> -               ulpi_config = phy->config;
> -               phy->clk = clk_get_sys(NULL, ulpi_config->clk);
> -               if (IS_ERR(phy->clk)) {
> -                       pr_err("%s: can't get ulpi clock\n", __func__);
> -                       err = -ENXIO;
> -                       goto err1;
> -               }
> -               if (!gpio_is_valid(ulpi_config->reset_gpio))
> -                       ulpi_config->reset_gpio =
> -                               of_get_named_gpio(phy->dev->of_node,
> -                                                 "nvidia,phy-reset-gpio", 0);
> -               if (!gpio_is_valid(ulpi_config->reset_gpio)) {
> -                       pr_err("%s: invalid reset gpio: %d\n", __func__,
> -                              ulpi_config->reset_gpio);
> -                       err = -EINVAL;
> -                       goto err1;
> -               }
> -               gpio_request(ulpi_config->reset_gpio, "ulpi_phy_reset_b");
> -               gpio_direction_output(ulpi_config->reset_gpio, 0);
> -               phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0);
> -               phy->ulpi->io_priv = phy->regs + ULPI_VIEWPORT;
> -       } else {
> -               err = utmip_pad_open(phy);
> -               if (err < 0)
> -                       goto err1;
> -       }
> -       return 0;
> -err1:
> -       clk_disable_unprepare(phy->pll_u);
> -       clk_put(phy->pll_u);
> -       return err;
> -}
> -
> -static void tegra_usb_phy_close(struct usb_phy *x)
> +static void tegra2_usb_phy_close(struct tegra_usb_phy *phy)
>  {
> -       struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
> -
>         if (phy_is_ulpi(phy))
>                 clk_put(phy->clk);
>         else
> -               utmip_pad_close(phy);
> +               tegra2_utmip_pad_close(phy);
>         clk_disable_unprepare(phy->pll_u);
>         clk_put(phy->pll_u);
> -       kfree(phy);
>  }
>
> -static int tegra_usb_phy_power_on(struct tegra_usb_phy *phy)
> +static int tegra2_usb_utmi_phy_open(struct tegra_usb_phy *phy)
>  {
> -       if (phy_is_ulpi(phy))
> -               return ulpi_phy_power_on(phy);
> -       else
> -               return utmi_phy_power_on(phy);
> -}
> +       int err;
>
> -static int tegra_usb_phy_power_off(struct tegra_usb_phy *phy)
> -{
> -       if (phy_is_ulpi(phy))
> -               return ulpi_phy_power_off(phy);
> -       else
> -               return utmi_phy_power_off(phy);
> -}
> +       err = tegra2_utmip_pad_open(phy);
> +       if (err < 0) {
> +               dev_err(phy->dev, "%s returned err", __func__);
> +               return err;
> +       }
>
> -static int     tegra_usb_phy_suspend(struct usb_phy *x, int suspend)
> -{
> -       struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
> -       if (suspend)
> -               return tegra_usb_phy_power_off(phy);
> -       else
> -               return tegra_usb_phy_power_on(phy);
> +       phy->ops.postresume = tegra2_utmi_phy_postresume;
> +       phy->ops.power_off = tegra2_utmi_phy_power_off;
> +       phy->ops.power_on = tegra2_utmi_phy_power_on;
> +       phy->ops.preresume = tegra2_utmi_phy_preresume;
> +       phy->ops.restore_end = tegra2_utmi_phy_restore_end;
> +       phy->ops.restore_start = tegra2_utmi_phy_restore_start;
> +
> +       return err;
>  }
>
> -struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance,
> -       void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode)
> +static int tegra2_usb_ulpi_phy_open(struct tegra_usb_phy *phy)
>  {
> -       struct tegra_usb_phy *phy;
> -       unsigned long parent_rate;
> -       int i;
> -       int err;
> -
> -       phy = kmalloc(sizeof(struct tegra_usb_phy), GFP_KERNEL);
> -       if (!phy)
> -               return ERR_PTR(-ENOMEM);
> -
> -       phy->instance = instance;
> -       phy->regs = regs;
> -       phy->config = config;
> -       phy->mode = phy_mode;
> -       phy->dev = dev;
> -
> -       if (!phy->config) {
> -               if (phy_is_ulpi(phy)) {
> -                       pr_err("%s: ulpi phy configuration missing", __func__);
> -                       err = -EINVAL;
> -                       goto err0;
> -               } else {
> -                       phy->config = &utmip_default[instance];
> -               }
> -       }
> +       struct tegra_ulpi_config *ulpi_config;
>
> -       phy->pll_u = clk_get_sys(NULL, "pll_u");
> -       if (IS_ERR(phy->pll_u)) {
> -               pr_err("Can't get pll_u clock\n");
> -               err = PTR_ERR(phy->pll_u);
> -               goto err0;
> +       ulpi_config = phy->config;
> +       phy->clk = clk_get_sys(NULL, ulpi_config->clk);
> +       if (IS_ERR(phy->clk)) {
> +               pr_err("%s: can't get ulpi clock\n", __func__);
> +               return -ENXIO;
>         }
> -       clk_prepare_enable(phy->pll_u);
> -
> -       parent_rate = clk_get_rate(clk_get_parent(phy->pll_u));
> -       for (i = 0; i < ARRAY_SIZE(tegra_freq_table); i++) {
> -               if (tegra_freq_table[i].freq == parent_rate) {
> -                       phy->freq = &tegra_freq_table[i];
> -                       break;
> -               }
> -       }
> -       if (!phy->freq) {
> -               pr_err("invalid pll_u parent rate %ld\n", parent_rate);
> -               err = -EINVAL;
> -               goto err1;
> +       if (!gpio_is_valid(ulpi_config->reset_gpio))
> +               ulpi_config->reset_gpio =
> +                       of_get_named_gpio(phy->dev->of_node,
> +                                         "nvidia,phy-reset-gpio", 0);
> +       if (!gpio_is_valid(ulpi_config->reset_gpio)) {
> +               pr_err("%s: invalid reset gpio: %d\n", __func__,
> +                      ulpi_config->reset_gpio);
> +               return -EINVAL;
>         }
> +       gpio_request(ulpi_config->reset_gpio, "ulpi_phy_reset_b");
> +       gpio_direction_output(ulpi_config->reset_gpio, 0);
> +       phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0);
> +       phy->ulpi->io_priv = phy->regs + ULPI_VIEWPORT;
>
> -       phy->u_phy.init = tegra_phy_init;
> -       phy->u_phy.shutdown = tegra_usb_phy_close;
> -       phy->u_phy.set_suspend = tegra_usb_phy_suspend;
> -
> -       return phy;
> -
> -err1:
> -       clk_disable_unprepare(phy->pll_u);
> -       clk_put(phy->pll_u);
> -err0:
> -       kfree(phy);
> -       return ERR_PTR(err);
> -}
> -EXPORT_SYMBOL_GPL(tegra_usb_phy_open);
> +       phy->ops.power_on = tegra2_ulpi_phy_power_on;
> +       phy->ops.power_off = tegra2_ulpi_phy_power_off;
>
> -void tegra_usb_phy_preresume(struct tegra_usb_phy *phy)
> -{
> -       if (!phy_is_ulpi(phy))
> -               utmi_phy_preresume(phy);
> +       return 0;
>  }
> -EXPORT_SYMBOL_GPL(tegra_usb_phy_preresume);
>
> -void tegra_usb_phy_postresume(struct tegra_usb_phy *phy)
> +int    tegra2_usb_phy_open(struct tegra_usb_phy *phy)
>  {
> -       if (!phy_is_ulpi(phy))
> -               utmi_phy_postresume(phy);
> -}
> -EXPORT_SYMBOL_GPL(tegra_usb_phy_postresume);
> +       int err;
>
> -void tegra_ehci_phy_restore_start(struct tegra_usb_phy *phy,
> -                                enum tegra_usb_phy_port_speed port_speed)
> -{
> -       if (!phy_is_ulpi(phy))
> -               utmi_phy_restore_start(phy, port_speed);
> -}
> -EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_start);
> +       if ((phy->type != TEGRA_USB_PHY_TYPE_ULPI) &&
> +               (phy->type != TEGRA_USB_PHY_TYPE_UTMI))
> +                       return -EINVAL;
>
> -void tegra_ehci_phy_restore_end(struct tegra_usb_phy *phy)
> -{
> -       if (!phy_is_ulpi(phy))
> -               utmi_phy_restore_end(phy);
> -}
> -EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_end);
> +       phy->ops.close = tegra2_usb_phy_close;
>
> -void tegra_usb_phy_clk_disable(struct tegra_usb_phy *phy)
> -{
> -       if (!phy_is_ulpi(phy))
> -               utmi_phy_clk_disable(phy);
> -}
> -EXPORT_SYMBOL_GPL(tegra_usb_phy_clk_disable);
> +       if (phy_is_ulpi(phy))
> +               err = tegra2_usb_ulpi_phy_open(phy);
> +       else
> +               err = tegra2_usb_utmi_phy_open(phy);
>
> -void tegra_usb_phy_clk_enable(struct tegra_usb_phy *phy)
> -{
> -       if (!phy_is_ulpi(phy))
> -               utmi_phy_clk_enable(phy);
> +       return err;
>  }
> -EXPORT_SYMBOL_GPL(tegra_usb_phy_clk_enable);
> diff --git a/drivers/usb/phy/tegra2_usb_phy.h b/drivers/usb/phy/tegra2_usb_phy.h
> new file mode 100644
> index 0000000..dc27da4
> --- /dev/null
> +++ b/drivers/usb/phy/tegra2_usb_phy.h
> @@ -0,0 +1,140 @@
> +/*
> + * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
> + *
> + * Author: Venu Byravarasu <vbyravarasu@xxxxxxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope 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/>.
> + */
> +
> +#ifndef _TEGRA2_USB_PHY_H
> +#define _TEGRA2_USB_PHY_H
> +
> +#define ULPI_VIEWPORT          0x170
> +
> +#define USB_PORTSC1            0x184
> +#define   USB_PORTSC1_PTS(x)   (((x) & 0x3) << 30)
> +#define   USB_PORTSC1_PSPD(x)  (((x) & 0x3) << 26)
> +#define   USB_PORTSC1_PHCD     (1 << 23)
> +#define   USB_PORTSC1_WKOC     (1 << 22)
> +#define   USB_PORTSC1_WKDS     (1 << 21)
> +#define   USB_PORTSC1_WKCN     (1 << 20)
> +#define   USB_PORTSC1_PTC(x)   (((x) & 0xf) << 16)
> +#define   USB_PORTSC1_PP       (1 << 12)
> +#define   USB_PORTSC1_SUSP     (1 << 7)
> +#define   USB_PORTSC1_PE       (1 << 2)
> +#define   USB_PORTSC1_CCS      (1 << 0)
> +
> +#define USB_SUSP_CTRL          0x400
> +#define   USB_WAKE_ON_CNNT_EN_DEV      (1 << 3)
> +#define   USB_WAKE_ON_DISCON_EN_DEV    (1 << 4)
> +#define   USB_SUSP_CLR         (1 << 5)
> +#define   USB_PHY_CLK_VALID    (1 << 7)
> +#define   UTMIP_RESET                  (1 << 11)
> +#define   UHSIC_RESET                  (1 << 11)
> +#define   UTMIP_PHY_ENABLE             (1 << 12)
> +#define   ULPI_PHY_ENABLE      (1 << 13)
> +#define   USB_SUSP_SET         (1 << 14)
> +#define   USB_WAKEUP_DEBOUNCE_COUNT(x) (((x) & 0x7) << 16)
> +
> +#define USB1_LEGACY_CTRL       0x410
> +#define   USB1_NO_LEGACY_MODE                  (1 << 0)
> +#define   USB1_VBUS_SENSE_CTL_MASK             (3 << 1)
> +#define   USB1_VBUS_SENSE_CTL_VBUS_WAKEUP      (0 << 1)
> +#define   USB1_VBUS_SENSE_CTL_AB_SESS_VLD_OR_VBUS_WAKEUP \
> +                                               (1 << 1)
> +#define   USB1_VBUS_SENSE_CTL_AB_SESS_VLD      (2 << 1)
> +#define   USB1_VBUS_SENSE_CTL_A_SESS_VLD       (3 << 1)
> +
> +#define ULPI_TIMING_CTRL_0     0x424
> +#define   ULPI_OUTPUT_PINMUX_BYP       (1 << 10)
> +#define   ULPI_CLKOUT_PINMUX_BYP       (1 << 11)
> +
> +#define ULPI_TIMING_CTRL_1     0x428
> +#define   ULPI_DATA_TRIMMER_LOAD       (1 << 0)
> +#define   ULPI_DATA_TRIMMER_SEL(x)     (((x) & 0x7) << 1)
> +#define   ULPI_STPDIRNXT_TRIMMER_LOAD  (1 << 16)
> +#define   ULPI_STPDIRNXT_TRIMMER_SEL(x)        (((x) & 0x7) << 17)
> +#define   ULPI_DIR_TRIMMER_LOAD                (1 << 24)
> +#define   ULPI_DIR_TRIMMER_SEL(x)      (((x) & 0x7) << 25)
> +
> +#define UTMIP_PLL_CFG1         0x804
> +#define   UTMIP_XTAL_FREQ_COUNT(x)             (((x) & 0xfff) << 0)
> +#define   UTMIP_PLLU_ENABLE_DLY_COUNT(x)       (((x) & 0x1f) << 27)
> +
> +#define UTMIP_XCVR_CFG0                0x808
> +#define   UTMIP_XCVR_SETUP(x)                  (((x) & 0xf) << 0)
> +#define   UTMIP_XCVR_LSRSLEW(x)                        (((x) & 0x3) << 8)
> +#define   UTMIP_XCVR_LSFSLEW(x)                        (((x) & 0x3) << 10)
> +#define   UTMIP_FORCE_PD_POWERDOWN             (1 << 14)
> +#define   UTMIP_FORCE_PD2_POWERDOWN            (1 << 16)
> +#define   UTMIP_FORCE_PDZI_POWERDOWN           (1 << 18)
> +#define   UTMIP_XCVR_HSSLEW_MSB(x)             (((x) & 0x7f) << 25)
> +
> +#define UTMIP_BIAS_CFG0                0x80c
> +#define   UTMIP_OTGPD                  (1 << 11)
> +#define   UTMIP_BIASPD                 (1 << 10)
> +
> +#define UTMIP_HSRX_CFG0                0x810
> +#define   UTMIP_ELASTIC_LIMIT(x)       (((x) & 0x1f) << 10)
> +#define   UTMIP_IDLE_WAIT(x)           (((x) & 0x1f) << 15)
> +
> +#define UTMIP_HSRX_CFG1                0x814
> +#define   UTMIP_HS_SYNC_START_DLY(x)   (((x) & 0x1f) << 1)
> +
> +#define UTMIP_TX_CFG0          0x820
> +#define   UTMIP_FS_PREABMLE_J          (1 << 19)
> +#define   UTMIP_HS_DISCON_DISABLE      (1 << 8)
> +
> +#define UTMIP_MISC_CFG0                0x824
> +#define   UTMIP_DPDM_OBSERVE           (1 << 26)
> +#define   UTMIP_DPDM_OBSERVE_SEL(x)    (((x) & 0xf) << 27)
> +#define   UTMIP_DPDM_OBSERVE_SEL_FS_J  UTMIP_DPDM_OBSERVE_SEL(0xf)
> +#define   UTMIP_DPDM_OBSERVE_SEL_FS_K  UTMIP_DPDM_OBSERVE_SEL(0xe)
> +#define   UTMIP_DPDM_OBSERVE_SEL_FS_SE1 UTMIP_DPDM_OBSERVE_SEL(0xd)
> +#define   UTMIP_DPDM_OBSERVE_SEL_FS_SE0 UTMIP_DPDM_OBSERVE_SEL(0xc)
> +#define   UTMIP_SUSPEND_EXIT_ON_EDGE   (1 << 22)
> +
> +#define UTMIP_MISC_CFG1                0x828
> +#define   UTMIP_PLL_ACTIVE_DLY_COUNT(x)        (((x) & 0x1f) << 18)
> +#define   UTMIP_PLLU_STABLE_COUNT(x)   (((x) & 0xfff) << 6)
> +
> +#define UTMIP_DEBOUNCE_CFG0    0x82c
> +#define   UTMIP_BIAS_DEBOUNCE_A(x)     (((x) & 0xffff) << 0)
> +
> +#define UTMIP_BAT_CHRG_CFG0    0x830
> +#define   UTMIP_PD_CHRG                        (1 << 0)
> +
> +#define UTMIP_SPARE_CFG0       0x834
> +#define   FUSE_SETUP_SEL               (1 << 3)
> +
> +#define UTMIP_XCVR_CFG1                0x838
> +#define   UTMIP_FORCE_PDDISC_POWERDOWN (1 << 0)
> +#define   UTMIP_FORCE_PDCHRP_POWERDOWN (1 << 2)
> +#define   UTMIP_FORCE_PDDR_POWERDOWN   (1 << 4)
> +#define   UTMIP_XCVR_TERM_RANGE_ADJ(x) (((x) & 0xf) << 18)
> +
> +#define UTMIP_BIAS_CFG1                0x83c
> +#define   UTMIP_BIAS_PDTRK_COUNT(x)    (((x) & 0x1f) << 3)

I think some of the #defines has space and some has tabs after *#define*.

Thanks
Kishon
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