/* * 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/gpio-tegra.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); }