ARM: tegra: Add support for Tegra USB PHYs

Interface used by Tegra's gadget driver and ehci driver
to power on and configure the USB PHYs.

Signed-off-by: Benoit Goby <benoit@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 795 insertions, 0 deletions

diff --git a/arch/arm/mach-tegra/usb_phy.c b/arch/arm/mach-tegra/usb_phy.c
new file mode 100644
index 000000000000..88081bb3ec52
--- /dev/null
+++ b/arch/arm/mach-tegra/usb_phy.c
@@ -0,0 +1,795 @@
+/*
+ * arch/arm/mach-tegra/usb_phy.c
+ *
+ * Copyright (C) 2010 Google, Inc.
+ *
+ * Author:
+ *      Erik Gilling <konkers@google.com>
+ *      Benoit Goby <benoit@android.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/resource.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/ulpi.h>
+#include <asm/mach-types.h>
+#include <mach/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)
+
+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);
+}
+
+static int utmip_pad_open(struct tegra_usb_phy *phy)
+{
+        phy->pad_clk = clk_get_sys("utmip-pad", NULL);
+        if (IS_ERR(phy->pad_clk)) {
+                pr_err("%s: can't get utmip pad clock\n", __func__);
+                return PTR_ERR(phy->pad_clk);
+        }
+
+        if (phy->instance == 0) {
+                phy->pad_regs = phy->regs;
+        } else {
+                phy->pad_regs = ioremap(TEGRA_USB_BASE, TEGRA_USB_SIZE);
+                if (!phy->pad_regs) {
+                        pr_err("%s: can't remap usb registers\n", __func__);
+                        clk_put(phy->pad_clk);
+                        return -ENOMEM;
+                }
+        }
+        return 0;
+}
+
+static void 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)
+{
+        unsigned long val, flags;
+        void __iomem *base = phy->pad_regs;
+
+        clk_enable(phy->pad_clk);
+
+        spin_lock_irqsave(&utmip_pad_lock, flags);
+
+        if (utmip_pad_count++ == 0) {
+                val = readl(base + UTMIP_BIAS_CFG0);
+                val &= ~(UTMIP_OTGPD | UTMIP_BIASPD);
+                writel(val, base + UTMIP_BIAS_CFG0);
+        }
+
+        spin_unlock_irqrestore(&utmip_pad_lock, flags);
+
+        clk_disable(phy->pad_clk);
+}
+
+static int utmip_pad_power_off(struct tegra_usb_phy *phy)
+{
+        unsigned long val, flags;
+        void __iomem *base = phy->pad_regs;
+
+        if (!utmip_pad_count) {
+                pr_err("%s: utmip pad already powered off\n", __func__);
+                return -EINVAL;
+        }
+
+        clk_enable(phy->pad_clk);
+
+        spin_lock_irqsave(&utmip_pad_lock, flags);
+
+        if (--utmip_pad_count == 0) {
+                val = readl(base + UTMIP_BIAS_CFG0);
+                val |= UTMIP_OTGPD | UTMIP_BIASPD;
+                writel(val, base + UTMIP_BIAS_CFG0);
+        }
+
+        spin_unlock_irqrestore(&utmip_pad_lock, flags);
+
+        clk_disable(phy->pad_clk);
+
+        return 0;
+}
+
+static int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
+{
+        unsigned long timeout = 2000;
+        do {
+                if ((readl(reg) & mask) == result)
+                        return 0;
+                udelay(1);
+                timeout--;
+        } while (timeout);
+        return -1;
+}
+
+static void utmi_phy_clk_disable(struct tegra_usb_phy *phy)
+{
+        unsigned long val;
+        void __iomem *base = phy->regs;
+
+        if (phy->instance == 0) {
+                val = readl(base + USB_SUSP_CTRL);
+                val |= USB_SUSP_SET;
+                writel(val, base + USB_SUSP_CTRL);
+
+                udelay(10);
+
+                val = readl(base + USB_SUSP_CTRL);
+                val &= ~USB_SUSP_SET;
+                writel(val, base + USB_SUSP_CTRL);
+        }
+
+        if (phy->instance == 2) {
+                val = readl(base + USB_PORTSC1);
+                val |= USB_PORTSC1_PHCD;
+                writel(val, base + USB_PORTSC1);
+        }
+
+        if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0) < 0)
+                pr_err("%s: timeout waiting for phy to stabilize\n", __func__);
+}
+
+static void utmi_phy_clk_enable(struct tegra_usb_phy *phy)
+{
+        unsigned long val;
+        void __iomem *base = phy->regs;
+
+        if (phy->instance == 0) {
+                val = readl(base + USB_SUSP_CTRL);
+                val |= USB_SUSP_CLR;
+                writel(val, base + USB_SUSP_CTRL);
+
+                udelay(10);
+
+                val = readl(base + USB_SUSP_CTRL);
+                val &= ~USB_SUSP_CLR;
+                writel(val, base + USB_SUSP_CTRL);
+        }
+
+        if (phy->instance == 2) {
+                val = readl(base + USB_PORTSC1);
+                val &= ~USB_PORTSC1_PHCD;
+                writel(val, base + USB_PORTSC1);
+        }
+
+        if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID,
+                                                     USB_PHY_CLK_VALID))
+                pr_err("%s: timeout waiting for phy to stabilize\n", __func__);
+}
+
+static int utmi_phy_power_on(struct tegra_usb_phy *phy)
+{
+        unsigned long val;
+        void __iomem *base = phy->regs;
+        struct tegra_utmip_config *config = phy->config;
+
+        val = readl(base + USB_SUSP_CTRL);
+        val |= UTMIP_RESET;
+        writel(val, base + USB_SUSP_CTRL);
+
+        if (phy->instance == 0) {
+                val = readl(base + USB1_LEGACY_CTRL);
+                val |= USB1_NO_LEGACY_MODE;
+                writel(val, base + USB1_LEGACY_CTRL);
+        }
+
+        val = readl(base + UTMIP_TX_CFG0);
+        val &= ~UTMIP_FS_PREABMLE_J;
+        writel(val, base + UTMIP_TX_CFG0);
+
+        val = readl(base + UTMIP_HSRX_CFG0);
+        val &= ~(UTMIP_IDLE_WAIT(~0) | UTMIP_ELASTIC_LIMIT(~0));
+        val |= UTMIP_IDLE_WAIT(config->idle_wait_delay);
+        val |= UTMIP_ELASTIC_LIMIT(config->elastic_limit);
+        writel(val, base + UTMIP_HSRX_CFG0);
+
+        val = readl(base + UTMIP_HSRX_CFG1);
+        val &= ~UTMIP_HS_SYNC_START_DLY(~0);
+        val |= UTMIP_HS_SYNC_START_DLY(config->hssync_start_delay);
+        writel(val, base + UTMIP_HSRX_CFG1);
+
+        val = readl(base + UTMIP_DEBOUNCE_CFG0);
+        val &= ~UTMIP_BIAS_DEBOUNCE_A(~0);
+        val |= UTMIP_BIAS_DEBOUNCE_A(phy->freq->debounce);
+        writel(val, base + UTMIP_DEBOUNCE_CFG0);
+
+        val = readl(base + UTMIP_MISC_CFG0);
+        val &= ~UTMIP_SUSPEND_EXIT_ON_EDGE;
+        writel(val, base + UTMIP_MISC_CFG0);
+
+        val = readl(base + UTMIP_MISC_CFG1);
+        val &= ~(UTMIP_PLL_ACTIVE_DLY_COUNT(~0) | UTMIP_PLLU_STABLE_COUNT(~0));
+        val |= UTMIP_PLL_ACTIVE_DLY_COUNT(phy->freq->active_delay) |
+                UTMIP_PLLU_STABLE_COUNT(phy->freq->stable_count);
+        writel(val, base + UTMIP_MISC_CFG1);
+
+        val = readl(base + UTMIP_PLL_CFG1);
+        val &= ~(UTMIP_XTAL_FREQ_COUNT(~0) | UTMIP_PLLU_ENABLE_DLY_COUNT(~0));
+        val |= UTMIP_XTAL_FREQ_COUNT(phy->freq->xtal_freq_count) |
+                UTMIP_PLLU_ENABLE_DLY_COUNT(phy->freq->enable_delay);
+        writel(val, base + UTMIP_PLL_CFG1);
+
+        if (phy->mode == TEGRA_USB_PHY_MODE_DEVICE) {
+                val = readl(base + USB_SUSP_CTRL);
+                val &= ~(USB_WAKE_ON_CNNT_EN_DEV | USB_WAKE_ON_DISCON_EN_DEV);
+                writel(val, base + USB_SUSP_CTRL);
+        }
+
+        utmip_pad_power_on(phy);
+
+        val = readl(base + UTMIP_XCVR_CFG0);
+        val &= ~(UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN |
+                 UTMIP_FORCE_PDZI_POWERDOWN | UTMIP_XCVR_SETUP(~0) |
+                 UTMIP_XCVR_LSFSLEW(~0) | UTMIP_XCVR_LSRSLEW(~0) |
+                 UTMIP_XCVR_HSSLEW_MSB(~0));
+        val |= UTMIP_XCVR_SETUP(config->xcvr_setup);
+        val |= UTMIP_XCVR_LSFSLEW(config->xcvr_lsfslew);
+        val |= UTMIP_XCVR_LSRSLEW(config->xcvr_lsrslew);
+        writel(val, base + UTMIP_XCVR_CFG0);
+
+        val = readl(base + UTMIP_XCVR_CFG1);
+        val &= ~(UTMIP_FORCE_PDDISC_POWERDOWN | UTMIP_FORCE_PDCHRP_POWERDOWN |
+                 UTMIP_FORCE_PDDR_POWERDOWN | UTMIP_XCVR_TERM_RANGE_ADJ(~0));
+        val |= UTMIP_XCVR_TERM_RANGE_ADJ(config->term_range_adj);
+        writel(val, base + UTMIP_XCVR_CFG1);
+
+        val = readl(base + UTMIP_BAT_CHRG_CFG0);
+        val &= ~UTMIP_PD_CHRG;
+        writel(val, base + UTMIP_BAT_CHRG_CFG0);
+
+        val = readl(base + UTMIP_BIAS_CFG1);
+        val &= ~UTMIP_BIAS_PDTRK_COUNT(~0);
+        val |= UTMIP_BIAS_PDTRK_COUNT(0x5);
+        writel(val, base + UTMIP_BIAS_CFG1);
+
+        if (phy->instance == 0) {
+                val = readl(base + UTMIP_SPARE_CFG0);
+                if (phy->mode == TEGRA_USB_PHY_MODE_DEVICE)
+                        val &= ~FUSE_SETUP_SEL;
+                else
+                        val |= FUSE_SETUP_SEL;
+                writel(val, base + UTMIP_SPARE_CFG0);
+        }
+
+        if (phy->instance == 2) {
+                val = readl(base + USB_SUSP_CTRL);
+                val |= UTMIP_PHY_ENABLE;
+                writel(val, base + USB_SUSP_CTRL);
+        }
+
+        val = readl(base + USB_SUSP_CTRL);
+        val &= ~UTMIP_RESET;
+        writel(val, base + USB_SUSP_CTRL);
+
+        if (phy->instance == 0) {
+                val = readl(base + USB1_LEGACY_CTRL);
+                val &= ~USB1_VBUS_SENSE_CTL_MASK;
+                val |= USB1_VBUS_SENSE_CTL_A_SESS_VLD;
+                writel(val, base + USB1_LEGACY_CTRL);
+
+                val = readl(base + USB_SUSP_CTRL);
+                val &= ~USB_SUSP_SET;
+                writel(val, base + USB_SUSP_CTRL);
+        }
+
+        utmi_phy_clk_enable(phy);
+
+        if (phy->instance == 2) {
+                val = readl(base + USB_PORTSC1);
+                val &= ~USB_PORTSC1_PTS(~0);
+                writel(val, base + USB_PORTSC1);
+        }
+
+        return 0;
+}
+
+static void utmi_phy_power_off(struct tegra_usb_phy *phy)
+{
+        unsigned long val;
+        void __iomem *base = phy->regs;
+
+        utmi_phy_clk_disable(phy);
+
+        if (phy->mode == TEGRA_USB_PHY_MODE_DEVICE) {
+                val = readl(base + USB_SUSP_CTRL);
+                val &= ~USB_WAKEUP_DEBOUNCE_COUNT(~0);
+                val |= USB_WAKE_ON_CNNT_EN_DEV | USB_WAKEUP_DEBOUNCE_COUNT(5);
+                writel(val, base + USB_SUSP_CTRL);
+        }
+
+        val = readl(base + USB_SUSP_CTRL);
+        val |= UTMIP_RESET;
+        writel(val, base + USB_SUSP_CTRL);
+
+        val = readl(base + UTMIP_BAT_CHRG_CFG0);
+        val |= UTMIP_PD_CHRG;
+        writel(val, base + UTMIP_BAT_CHRG_CFG0);
+
+        val = readl(base + UTMIP_XCVR_CFG0);
+        val |= UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN |
+               UTMIP_FORCE_PDZI_POWERDOWN;
+        writel(val, base + UTMIP_XCVR_CFG0);
+
+        val = readl(base + UTMIP_XCVR_CFG1);
+        val |= UTMIP_FORCE_PDDISC_POWERDOWN | UTMIP_FORCE_PDCHRP_POWERDOWN |
+               UTMIP_FORCE_PDDR_POWERDOWN;
+        writel(val, base + UTMIP_XCVR_CFG1);
+
+        utmip_pad_power_off(phy);
+}
+
+static void utmi_phy_preresume(struct tegra_usb_phy *phy)
+{
+        unsigned long val;
+        void __iomem *base = phy->regs;
+
+        val = readl(base + UTMIP_TX_CFG0);
+        val |= UTMIP_HS_DISCON_DISABLE;
+        writel(val, base + UTMIP_TX_CFG0);
+}
+
+static void utmi_phy_postresume(struct tegra_usb_phy *phy)
+{
+        unsigned long val;
+        void __iomem *base = phy->regs;
+
+        val = readl(base + UTMIP_TX_CFG0);
+        val &= ~UTMIP_HS_DISCON_DISABLE;
+        writel(val, base + UTMIP_TX_CFG0);
+}
+
+static void utmi_phy_restore_start(struct tegra_usb_phy *phy,
+                                   enum tegra_usb_phy_port_speed port_speed)
+{
+        unsigned long val;
+        void __iomem *base = phy->regs;
+
+        val = readl(base + UTMIP_MISC_CFG0);
+        val &= ~UTMIP_DPDM_OBSERVE_SEL(~0);
+        if (port_speed == TEGRA_USB_PHY_PORT_SPEED_LOW)
+                val |= UTMIP_DPDM_OBSERVE_SEL_FS_K;
+        else
+                val |= UTMIP_DPDM_OBSERVE_SEL_FS_J;
+        writel(val, base + UTMIP_MISC_CFG0);
+        udelay(1);
+
+        val = readl(base + UTMIP_MISC_CFG0);
+        val |= UTMIP_DPDM_OBSERVE;
+        writel(val, base + UTMIP_MISC_CFG0);
+        udelay(10);
+}
+
+static void utmi_phy_restore_end(struct tegra_usb_phy *phy)
+{
+        unsigned long val;
+        void __iomem *base = phy->regs;
+
+        val = readl(base + UTMIP_MISC_CFG0);
+        val &= ~UTMIP_DPDM_OBSERVE;
+        writel(val, base + UTMIP_MISC_CFG0);
+        udelay(10);
+}
+
+static int ulpi_phy_power_on(struct tegra_usb_phy *phy)
+{
+        int ret;
+        unsigned long val;
+        void __iomem *base = phy->regs;
+        struct tegra_ulpi_config *config = phy->config;
+
+        gpio_direction_output(config->reset_gpio, 0);
+        msleep(5);
+        gpio_direction_output(config->reset_gpio, 1);
+
+        clk_enable(phy->clk);
+        msleep(1);
+
+        val = readl(base + USB_SUSP_CTRL);
+        val |= UHSIC_RESET;
+        writel(val, base + USB_SUSP_CTRL);
+
+        val = readl(base + ULPI_TIMING_CTRL_0);
+        val |= ULPI_OUTPUT_PINMUX_BYP | ULPI_CLKOUT_PINMUX_BYP;
+        writel(val, base + ULPI_TIMING_CTRL_0);
+
+        val = readl(base + USB_SUSP_CTRL);
+        val |= ULPI_PHY_ENABLE;
+        writel(val, base + USB_SUSP_CTRL);
+
+        val = 0;
+        writel(val, base + ULPI_TIMING_CTRL_1);
+
+        val |= ULPI_DATA_TRIMMER_SEL(4);
+        val |= ULPI_STPDIRNXT_TRIMMER_SEL(4);
+        val |= ULPI_DIR_TRIMMER_SEL(4);
+        writel(val, base + ULPI_TIMING_CTRL_1);
+        udelay(10);
+
+        val |= ULPI_DATA_TRIMMER_LOAD;
+        val |= ULPI_STPDIRNXT_TRIMMER_LOAD;
+        val |= ULPI_DIR_TRIMMER_LOAD;
+        writel(val, base + ULPI_TIMING_CTRL_1);
+
+        /* Fix VbusInvalid due to floating VBUS */
+        ret = otg_io_write(phy->ulpi, 0x40, 0x08);
+        if (ret) {
+                pr_err("%s: ulpi write failed\n", __func__);
+                return ret;
+        }
+
+        ret = otg_io_write(phy->ulpi, 0x80, 0x0B);
+        if (ret) {
+                pr_err("%s: ulpi write failed\n", __func__);
+                return ret;
+        }
+
+        val = readl(base + USB_PORTSC1);
+        val |= USB_PORTSC1_WKOC | USB_PORTSC1_WKDS | USB_PORTSC1_WKCN;
+        writel(val, base + USB_PORTSC1);
+
+        val = readl(base + USB_SUSP_CTRL);
+        val |= USB_SUSP_CLR;
+        writel(val, base + USB_SUSP_CTRL);
+        udelay(100);
+
+        val = readl(base + USB_SUSP_CTRL);
+        val &= ~USB_SUSP_CLR;
+        writel(val, base + USB_SUSP_CTRL);
+
+        return 0;
+}
+
+static void ulpi_phy_power_off(struct tegra_usb_phy *phy)
+{
+        unsigned long val;
+        void __iomem *base = phy->regs;
+        struct tegra_ulpi_config *config = phy->config;
+
+        /* Clear WKCN/WKDS/WKOC wake-on events that can cause the USB
+         * Controller to immediately bring the ULPI PHY out of low power
+         */
+        val = readl(base + USB_PORTSC1);
+        val &= ~(USB_PORTSC1_WKOC | USB_PORTSC1_WKDS | USB_PORTSC1_WKCN);
+        writel(val, base + USB_PORTSC1);
+
+        gpio_direction_output(config->reset_gpio, 0);
+        clk_disable(phy->clk);
+}
+
+struct tegra_usb_phy *tegra_usb_phy_open(int instance, void __iomem *regs,
+                        void *config, enum tegra_usb_phy_mode phy_mode)
+{
+        struct tegra_usb_phy *phy;
+        struct tegra_ulpi_config *ulpi_config;
+        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;
+
+        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];
+                }
+        }
+
+        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;
+        }
+        clk_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 (phy_is_ulpi(phy)) {
+                ulpi_config = 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;
+                }
+                tegra_gpio_enable(ulpi_config->reset_gpio);
+                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 = regs + ULPI_VIEWPORT;
+        } else {
+                err = utmip_pad_open(phy);
+                if (err < 0)
+                        goto err1;
+        }
+
+        return phy;
+
+err1:
+        clk_disable(phy->pll_u);
+        clk_put(phy->pll_u);
+err0:
+        kfree(phy);
+        return ERR_PTR(err);
+}
+
+int tegra_usb_phy_power_on(struct tegra_usb_phy *phy)
+{
+        if (phy_is_ulpi(phy))
+                return ulpi_phy_power_on(phy);
+        else
+                return utmi_phy_power_on(phy);
+}
+
+void tegra_usb_phy_power_off(struct tegra_usb_phy *phy)
+{
+        if (phy_is_ulpi(phy))
+                ulpi_phy_power_off(phy);
+        else
+                utmi_phy_power_off(phy);
+}
+
+void tegra_usb_phy_preresume(struct tegra_usb_phy *phy)
+{
+        if (!phy_is_ulpi(phy))
+                utmi_phy_preresume(phy);
+}
+
+void tegra_usb_phy_postresume(struct tegra_usb_phy *phy)
+{
+        if (!phy_is_ulpi(phy))
+                utmi_phy_postresume(phy);
+}
+
+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);
+}
+
+void tegra_ehci_phy_restore_end(struct tegra_usb_phy *phy)
+{
+        if (!phy_is_ulpi(phy))
+                utmi_phy_restore_end(phy);
+}
+
+void tegra_usb_phy_clk_disable(struct tegra_usb_phy *phy)
+{
+        if (!phy_is_ulpi(phy))
+                utmi_phy_clk_disable(phy);
+}
+
+void tegra_usb_phy_clk_enable(struct tegra_usb_phy *phy)
+{
+        if (!phy_is_ulpi(phy))
+                utmi_phy_clk_enable(phy);
+}
+
+void tegra_usb_phy_close(struct tegra_usb_phy *phy)
+{
+        if (phy_is_ulpi(phy))
+                clk_put(phy->clk);
+        else
+                utmip_pad_close(phy);
+        clk_disable(phy->pll_u);
+        clk_put(phy->pll_u);
+        kfree(phy);
+}