diff options
Diffstat (limited to 'arch/arm/mach-tegra/tegra2_usb_phy.c')
| -rw-r--r-- | arch/arm/mach-tegra/tegra2_usb_phy.c | 1598 |
1 files changed, 1598 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/tegra2_usb_phy.c b/arch/arm/mach-tegra/tegra2_usb_phy.c new file mode 100644 index 000000000000..819721c49a29 --- /dev/null +++ b/arch/arm/mach-tegra/tegra2_usb_phy.c @@ -0,0 +1,1598 @@ +/* + * arch/arm/mach-tegra/tegra2_usb_phy.c + * + * Copyright (C) 2011 NVIDIA Corporation + * + * + * 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/interrupt.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 <linux/interrupt.h> +#include <linux/clk.h> +#include <linux/regulator/consumer.h> +#include <linux/platform_data/tegra_usb.h> +#include <mach/iomap.h> +#include <mach/pinmux.h> +#include <asm/mach-types.h> +#include <mach/usb_phy.h> +#include "tegra_usb_phy.h" +#include "fuse.h" + + +#define USB_USBCMD 0x140 +#define USB_USBCMD_RS (1 << 0) +#define USB_USBCMD_RESET (1 << 1) + +#define USB_USBSTS 0x144 +#define USB_USBSTS_PCI (1 << 2) +#define USB_USBSTS_SRI (1 << 7) +#define USB_USBSTS_HCH (1 << 12) + +#define USB_ASYNCLISTADDR 0x158 + +#define USB_TXFILLTUNING 0x164 +#define USB_FIFO_TXFILL_THRES(x) (((x) & 0x1f) << 16) +#define USB_FIFO_TXFILL_MASK 0x1f0000 + +#define ULPI_VIEWPORT 0x170 +#define ULPI_WAKEUP (1 << 31) +#define ULPI_RUN (1 << 30) +#define ULPI_RD_WR (1 << 29) + +#define USB_PORTSC 0x184 +#define USB_PORTSC_PTS(x) (((x) & 0x3) << 30) +#define USB_PORTSC_PSPD(x) (((x) & 0x3) << 26) +#define USB_PORTSC_PHCD (1 << 23) +#define USB_PORTSC_WKOC (1 << 22) +#define USB_PORTSC_WKDS (1 << 21) +#define USB_PORTSC_WKCN (1 << 20) +#define USB_PORTSC_PTC(x) (((x) & 0xf) << 16) +#define USB_PORTSC_PP (1 << 12) +#define USB_PORTSC_LS(x) (((x) & 0x3) << 10) +#define USB_PORTSC_SUSP (1 << 7) +#define USB_PORTSC_OCC (1 << 5) +#define USB_PORTSC_PEC (1 << 3) +#define USB_PORTSC_PE (1 << 2) +#define USB_PORTSC_CSC (1 << 1) +#define USB_PORTSC_CCS (1 << 0) +#define USB_PORTSC_RWC_BITS (USB_PORTSC_CSC | USB_PORTSC_PEC | USB_PORTSC_OCC) +#define USB_PORTSC_PSPD_MASK 3 + +#define USB_USBMODE_REG_OFFSET 0x1a8 +#define USB_USBMODE_MASK (3 << 0) +#define USB_USBMODE_HOST (3 << 0) +#define USB_USBMODE_DEVICE (2 << 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_CLKEN (1 << 6) +#define USB_PHY_CLK_VALID (1 << 7) +#define USB_PHY_CLK_VALID_INT_ENB (1 << 9) +#define UTMIP_RESET (1 << 11) +#define UHSIC_RESET (1 << 11) +#define UTMIP_PHY_ENABLE (1 << 12) +#define UHSIC_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 USB_PHY_CLK_VALID_INT_STS (1 << 8) + +#define USB_PHY_VBUS_WAKEUP_ID 0x408 +#define VDAT_DET_INT_EN (1 << 16) +#define VDAT_DET_CHG_DET (1 << 17) +#define VDAT_DET_STS (1 << 18) +#define USB_ID_STATUS (1 << 2) + +#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 ULPIS2S_CTRL 0x418 +#define ULPIS2S_ENA (1 << 0) +#define ULPIS2S_SUPPORT_DISCONNECT (1 << 2) +#define ULPIS2S_PLLU_MASTER_BLASTER60 (1 << 3) +#define ULPIS2S_SPARE(x) (((x) & 0xF) << 8) +#define ULPIS2S_FORCE_ULPI_CLK_OUT (1 << 12) +#define ULPIS2S_DISCON_DONT_CHECK_SE0 (1 << 13) +#define ULPIS2S_SUPPORT_HS_KEEP_ALIVE (1 << 14) +#define ULPIS2S_DISABLE_STP_PU (1 << 15) +#define ULPIS2S_SLV0_CLAMP_XMIT (1 << 16) + +#define ULPI_TIMING_CTRL_0 0x424 +#define ULPI_CLOCK_OUT_DELAY(x) ((x) & 0x1F) +#define ULPI_OUTPUT_PINMUX_BYP (1 << 10) +#define ULPI_CLKOUT_PINMUX_BYP (1 << 11) +#define ULPI_SHADOW_CLK_LOOPBACK_EN (1 << 12) +#define ULPI_SHADOW_CLK_SEL (1 << 13) +#define ULPI_CORE_CLK_SEL (1 << 14) +#define ULPI_SHADOW_CLK_DELAY(x) (((x) & 0x1F) << 16) +#define ULPI_LBK_PAD_EN (1 << 26) +#define ULPI_LBK_PAD_E_INPUT_OR (1 << 27) +#define ULPI_CLK_OUT_ENA (1 << 28) +#define ULPI_CLK_PADOUT_ENA (1 << 29) + +#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 UHSIC_PLL_CFG1 0x804 +#define UTMIP_XTAL_FREQ_COUNT(x) (((x) & 0xfff) << 0) +#define UTMIP_PLLU_ENABLE_DLY_COUNT(x) (((x) & 0x1f) << 27) +#define UHSIC_XTAL_FREQ_COUNT(x) (((x) & 0xfff) << 0) +#define UHSIC_PLLU_ENABLE_DLY_COUNT(x) (((x) & 0x1f) << 14) + +#define UTMIP_XCVR_UHSIC_HSRX_CFG0 0x808 +#define UTMIP_XCVR_SETUP(x) (((x) & 0xf) << 0) +#define UHSIC_ELASTIC_UNDERRUN_LIMIT(x) (((x) & 0x1f) << 2) +#define UHSIC_ELASTIC_OVERRUN_LIMIT(x) (((x) & 0x1f) << 8) +#define UTMIP_XCVR_LSRSLEW(x) (((x) & 0x3) << 8) +#define UTMIP_XCVR_LSFSLEW(x) (((x) & 0x3) << 10) +#define UHSIC_IDLE_WAIT(x) (((x) & 0x1f) << 13) +#define UTMIP_FORCE_PD_POWERDOWN (1 << 14) +#define UTMIP_FORCE_PD2_POWERDOWN (1 << 16) +#define UTMIP_FORCE_PDZI_POWERDOWN (1 << 18) +#define UTMIP_XCVR_LSBIAS_SEL (1 << 21) +#define UTMIP_XCVR_SETUP_MSB(x) (((x) & 0x7) << 22) +#define UTMIP_XCVR_HSSLEW_MSB(x) (((x) & 0x7f) << 25) +#define UTMIP_XCVR_MAX_OFFSET 2 +#define UTMIP_XCVR_SETUP_MAX_VALUE 0x7f +#define UTMIP_XCVR_SETUP_MIN_VALUE 0 +#define XCVR_SETUP_MSB_CALIB(x) ((x) >> 4) + +#define UTMIP_BIAS_CFG0 0x80c +#define UTMIP_OTGPD (1 << 11) +#define UTMIP_BIASPD (1 << 10) + +#define UHSIC_HSRX_CFG1 0x80c +#define UHSIC_HS_SYNC_START_DLY(x) (((x) & 0x1f) << 1) + +#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 UHSIC_MISC_CFG0 0x814 +#define UTMIP_HS_SYNC_START_DLY(x) (((x) & 0x1f) << 1) +#define UHSIC_SUSPEND_EXIT_ON_EDGE (1 << 7) +#define UHSIC_DETECT_SHORT_CONNECT (1 << 8) +#define UHSIC_FORCE_XCVR_MODE (1 << 15) + +#define UHSIC_MISC_CFG1 0x818 +#define UHSIC_PLLU_STABLE_COUNT(x) (((x) & 0xfff) << 2) + +#define UHSIC_PADS_CFG0 0x81c +#define UHSIC_TX_RTUNEN 0xf000 +#define UHSIC_TX_RTUNE(x) (((x) & 0xf) << 12) + +#define UTMIP_TX_CFG0 0x820 +#define UHSIC_PADS_CFG1 0x820 +#define UHSIC_PD_BG (1 << 2) +#define UHSIC_PD_TX (1 << 3) +#define UHSIC_PD_TRK (1 << 4) +#define UHSIC_PD_RX (1 << 5) +#define UHSIC_PD_ZI (1 << 6) +#define UHSIC_RX_SEL (1 << 7) +#define UHSIC_RPD_DATA (1 << 9) +#define UHSIC_RPD_STROBE (1 << 10) +#define UHSIC_RPU_DATA (1 << 11) +#define UHSIC_RPU_STROBE (1 << 12) +#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 FORCE_PULLDN_DM (1 << 8) +#define FORCE_PULLDN_DP (1 << 9) +#define COMB_TERMS (1 << 0) +#define ALWAYS_FREE_RUNNING_TERMS (1 << 1) + +#define USB1_PREFETCH_ID 6 +#define USB2_PREFETCH_ID 18 +#define USB3_PREFETCH_ID 17 + +#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 UHSIC_STAT_CFG0 0x828 +#define UHSIC_CONNECT_DETECT (1 << 0) + +#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_ON_SINK_EN (1 << 2) +#define UTMIP_OP_SRC_EN (1 << 3) + +#define UTMIP_SPARE_CFG0 0x834 +#define FUSE_SETUP_SEL (1 << 3) +#define FUSE_ATERM_SEL (1 << 4) + +#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) + +#define FUSE_USB_CALIB_0 0x1F0 +#define FUSE_USB_CALIB_XCVR_SETUP(x) (((x) & 0x7F) << 0) + +/* These values (in milli second) are taken from the battery charging spec */ +#define TDP_SRC_ON_MS 100 +#define TDPSRC_CON_MS 40 + +#ifdef DEBUG +#define DBG(stuff...) pr_info("tegra2_usb_phy: " stuff) +#else +#define DBG(stuff...) do {} while (0) +#endif + +static DEFINE_SPINLOCK(utmip_pad_lock); +static int utmip_pad_count; +static int utmip_pad_state_on; + +static struct tegra_xtal_freq utmip_freq_table[] = { + { + .freq = 12000000, + .enable_delay = 0x02, + .stable_count = 0x2F, + .active_delay = 0x04, + .xtal_freq_count = 0x76, + .debounce = 0x7530, + .pdtrk_count = 5, + }, + { + .freq = 13000000, + .enable_delay = 0x02, + .stable_count = 0x33, + .active_delay = 0x05, + .xtal_freq_count = 0x7F, + .debounce = 0x7EF4, + .pdtrk_count = 5, + }, + { + .freq = 19200000, + .enable_delay = 0x03, + .stable_count = 0x4B, + .active_delay = 0x06, + .xtal_freq_count = 0xBB, + .debounce = 0xBB80, + .pdtrk_count = 7, + }, + { + .freq = 26000000, + .enable_delay = 0x04, + .stable_count = 0x66, + .active_delay = 0x09, + .xtal_freq_count = 0xFE, + .debounce = 0xFDE8, + .pdtrk_count = 9, + }, +}; + +static struct tegra_xtal_freq uhsic_freq_table[] = { + { + .freq = 12000000, + .enable_delay = 0x02, + .stable_count = 0x2F, + .active_delay = 0x0, + .xtal_freq_count = 0x1CA, + }, + { + .freq = 13000000, + .enable_delay = 0x02, + .stable_count = 0x33, + .active_delay = 0x0, + .xtal_freq_count = 0x1F0, + }, + { + .freq = 19200000, + .enable_delay = 0x03, + .stable_count = 0x4B, + .active_delay = 0x0, + .xtal_freq_count = 0x2DD, + }, + { + .freq = 26000000, + .enable_delay = 0x04, + .stable_count = 0x66, + .active_delay = 0x0, + .xtal_freq_count = 0x3E0, + }, +}; + +static void usb_phy_fence_read(struct tegra_usb_phy *phy) +{ + /* Fence read for coherency of AHB master intiated writes */ + if (phy->inst == 0) + readb(IO_ADDRESS(IO_PPCS_PHYS + USB1_PREFETCH_ID)); + else if (phy->inst == 1) + readb(IO_ADDRESS(IO_PPCS_PHYS + USB2_PREFETCH_ID)); + else if (phy->inst == 2) + readb(IO_ADDRESS(IO_PPCS_PHYS + USB3_PREFETCH_ID)); + + return; +} + +static int usb_phy_bringup_host_controller(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + DBG("USB_USBSTS[0x%x] USB_PORTSC[0x%x] port_speed[%d] - 0\n", + readl(base + USB_USBSTS), readl(base + USB_PORTSC), + phy->port_speed); + + /* enable host mode */ + val = readl(base + USB_USBMODE_REG_OFFSET); + val |= USB_USBMODE_HOST; + writel(val, base + USB_USBMODE_REG_OFFSET); + + /* Enable Port Power */ + val = readl(base + USB_PORTSC); + val |= USB_PORTSC_PP; + writel(val, base + USB_PORTSC); + udelay(10); + + /* Check if the phy resume from LP0. When the phy resume from LP0 + * USB register will be reset.to zero */ + if (!readl(base + USB_ASYNCLISTADDR)) { + val = readl(base + USB_USBCMD); + val |= USB_USBCMD_RS; + writel(val, base + USB_USBCMD); + + /* Program the field PTC based on the saved speed mode */ + val = readl(base + USB_PORTSC); + val &= ~(USB_PORTSC_PTC(~0)); + if (phy->port_speed == USB_PHY_PORT_SPEED_HIGH) + val |= USB_PORTSC_PTC(5); + else if (phy->port_speed == USB_PHY_PORT_SPEED_FULL) + val |= USB_PORTSC_PTC(6); + else if (phy->port_speed == USB_PHY_PORT_SPEED_LOW) + val |= USB_PORTSC_PTC(7); + writel(val, base + USB_PORTSC); + udelay(10); + + /* Disable test mode by setting PTC field to NORMAL_OP */ + val = readl(base + USB_PORTSC); + val &= ~(USB_PORTSC_PTC(~0)); + writel(val, base + USB_PORTSC); + udelay(10); + } + + /* Poll until CCS is enabled */ + if (usb_phy_reg_status_wait(base + USB_PORTSC, USB_PORTSC_CCS, + USB_PORTSC_CCS, 2000)) { + pr_err("%s: timeout waiting for USB_PORTSC_CCS\n", __func__); + } + + /* Poll until PE is enabled */ + if (usb_phy_reg_status_wait(base + USB_PORTSC, USB_PORTSC_PE, + USB_PORTSC_PE, 2000)) { + pr_err("%s: timeout waiting for USB_PORTSC_PE\n", __func__); + } + + /* Clear the PCI status, to avoid an interrupt taken upon resume */ + val = readl(base + USB_USBSTS); + val |= USB_USBSTS_PCI; + writel(val, base + USB_USBSTS); + + /* Put controller in suspend mode by writing 1 to SUSP bit of PORTSC */ + val = readl(base + USB_PORTSC); + if ((val & USB_PORTSC_PP) && (val & USB_PORTSC_PE)) { + val |= USB_PORTSC_SUSP; + writel(val, base + USB_PORTSC); + /* Need a 4ms delay before the controller goes to suspend */ + mdelay(4); + + /* Wait until port suspend completes */ + if (usb_phy_reg_status_wait(base + USB_PORTSC, USB_PORTSC_SUSP, + USB_PORTSC_SUSP, 1000)) { + pr_err("%s: timeout waiting for PORT_SUSPEND\n", + __func__); + } + } + + DBG("USB_USBSTS[0x%x] USB_PORTSC[0x%x]\n", + readl(base + USB_USBSTS), readl(base + USB_PORTSC)); + + return 0; +} + +static void usb_phy_wait_for_sof(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + val = readl(base + USB_USBSTS); + writel(val, base + USB_USBSTS); + udelay(20); + /* wait for two SOFs */ + if (usb_phy_reg_status_wait(base + USB_USBSTS, USB_USBSTS_SRI, + USB_USBSTS_SRI, 2500)) + pr_err("%s: timeout waiting for SOF\n", __func__); + + val = readl(base + USB_USBSTS); + writel(val, base + USB_USBSTS); + if (usb_phy_reg_status_wait(base + USB_USBSTS, USB_USBSTS_SRI, 0, 2500)) + pr_err("%s: timeout waiting for SOF\n", __func__); + + if (usb_phy_reg_status_wait(base + USB_USBSTS, USB_USBSTS_SRI, + USB_USBSTS_SRI, 2500)) + pr_err("%s: timeout waiting for SOF\n", __func__); + + udelay(20); +} + +static unsigned int utmi_phy_xcvr_setup_value(struct tegra_usb_phy *phy) +{ + struct tegra_utmi_config *cfg = &phy->pdata->u_cfg.utmi; + signed long val; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + if (cfg->xcvr_use_fuses) { + val = FUSE_USB_CALIB_XCVR_SETUP( + tegra_fuse_readl(FUSE_USB_CALIB_0)); + if (cfg->xcvr_setup_offset <= UTMIP_XCVR_MAX_OFFSET) + val = val + cfg->xcvr_setup_offset; + + if (val > UTMIP_XCVR_SETUP_MAX_VALUE) { + val = UTMIP_XCVR_SETUP_MAX_VALUE; + pr_info("%s: reset XCVR_SETUP to max value\n", + __func__); + } else if (val < UTMIP_XCVR_SETUP_MIN_VALUE) { + val = UTMIP_XCVR_SETUP_MIN_VALUE; + pr_info("%s: reset XCVR_SETUP to min value\n", + __func__); + } + } else { + val = cfg->xcvr_setup; + } + + return (unsigned int) val; +} + + +static int utmi_phy_open(struct tegra_usb_phy *phy) +{ + unsigned long parent_rate; + int i; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + phy->utmi_pad_clk = clk_get_sys("utmip-pad", NULL); + if (IS_ERR(phy->utmi_pad_clk)) { + pr_err("%s: can't get utmip pad clock\n", __func__); + return PTR_ERR(phy->utmi_pad_clk); + } + + phy->utmi_xcvr_setup = utmi_phy_xcvr_setup_value(phy); + + parent_rate = clk_get_rate(clk_get_parent(phy->pllu_clk)); + for (i = 0; i < ARRAY_SIZE(utmip_freq_table); i++) { + if (utmip_freq_table[i].freq == parent_rate) { + phy->freq = &utmip_freq_table[i]; + break; + } + } + if (!phy->freq) { + pr_err("invalid pll_u parent rate %ld\n", parent_rate); + return -EINVAL; + } + + return 0; +} + +static void utmi_phy_close(struct tegra_usb_phy *phy) +{ + DBG("%s inst:[%d]\n", __func__, phy->inst); + + clk_put(phy->utmi_pad_clk); +} + +static int utmi_phy_pad_power_on(struct tegra_usb_phy *phy) +{ + unsigned long val, flags; + void __iomem *pad_base = IO_ADDRESS(TEGRA_USB_BASE); + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + clk_enable(phy->utmi_pad_clk); + + spin_lock_irqsave(&utmip_pad_lock, flags); + + utmip_pad_count++; + val = readl(pad_base + UTMIP_BIAS_CFG0); + val &= ~(UTMIP_OTGPD | UTMIP_BIASPD); + writel(val, pad_base + UTMIP_BIAS_CFG0); + utmip_pad_state_on = true; + + spin_unlock_irqrestore(&utmip_pad_lock, flags); + + clk_disable(phy->utmi_pad_clk); + + return 0; +} + +static int utmi_phy_pad_power_off(struct tegra_usb_phy *phy) +{ + unsigned long val, flags; + void __iomem *pad_base = IO_ADDRESS(TEGRA_USB_BASE); + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + clk_enable(phy->utmi_pad_clk); + spin_lock_irqsave(&utmip_pad_lock, flags); + + if (!utmip_pad_count) { + pr_err("%s: utmip pad already powered off\n", __func__); + goto out; + } + if (--utmip_pad_count == 0) { + val = readl(pad_base + UTMIP_BIAS_CFG0); + val |= UTMIP_OTGPD | UTMIP_BIASPD; + writel(val, pad_base + UTMIP_BIAS_CFG0); + utmip_pad_state_on = false; + } +out: + spin_unlock_irqrestore(&utmip_pad_lock, flags); + clk_disable(phy->utmi_pad_clk); + + return 0; +} + +static int utmi_phy_irq(struct tegra_usb_phy *phy) +{ + void __iomem *base = phy->regs; + unsigned long val = 0; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + + usb_phy_fence_read(phy); + if (phy->pdata->u_data.host.hot_plug) { + val = readl(base + USB_SUSP_CTRL); + if ((val & USB_PHY_CLK_VALID_INT_STS)) { + val &= ~USB_PHY_CLK_VALID_INT_ENB | + USB_PHY_CLK_VALID_INT_STS; + writel(val , (base + USB_SUSP_CTRL)); + pr_info("%s: usb device plugged-in\n", __func__); + val = readl(base + USB_USBSTS); + if (!(val & USB_USBSTS_PCI)) + return IRQ_NONE; + val = readl(base + USB_PORTSC); + val &= ~(USB_PORTSC_WKCN | USB_PORTSC_RWC_BITS); + writel(val , (base + USB_PORTSC)); + } + } + + return IRQ_HANDLED; +} + + +static int utmi_phy_post_resume(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + + val = readl(base + UTMIP_TX_CFG0); + val &= ~UTMIP_HS_DISCON_DISABLE; + writel(val, base + UTMIP_TX_CFG0); + return 0; +} + +static int utmi_phy_pre_resume(struct tegra_usb_phy *phy, bool remote_wakeup) +{ + unsigned long val; + void __iomem *base = phy->regs; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + val = readl(base + UTMIP_TX_CFG0); + val |= UTMIP_HS_DISCON_DISABLE; + writel(val, base + UTMIP_TX_CFG0); + + usb_phy_wait_for_sof(phy); + + return 0; +} + +static int utmi_phy_power_off(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + if (!phy->phy_clk_on) { + DBG("%s(%d) inst:[%d] phy clk is already off\n", + __func__, __LINE__, phy->inst); + return 0; + } + + if (phy->pdata->op_mode == TEGRA_USB_OPMODE_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 + UTMIP_BAT_CHRG_CFG0); + val |= UTMIP_PD_CHRG; + writel(val, base + UTMIP_BAT_CHRG_CFG0); + } + + if (!phy->pdata->u_data.host.hot_plug) { + val = readl(base + UTMIP_XCVR_UHSIC_HSRX_CFG0); + val |= (UTMIP_FORCE_PD_POWERDOWN | UTMIP_FORCE_PD2_POWERDOWN | + UTMIP_FORCE_PDZI_POWERDOWN); + writel(val, base + UTMIP_XCVR_UHSIC_HSRX_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); + + if (phy->inst != 0) { + val = readl(base + UTMIP_BIAS_CFG0); + val |= UTMIP_OTGPD; + writel(val, base + UTMIP_BIAS_CFG0); + } + + phy->port_speed = (readl(base + USB_PORTSC) >> 26) & + USB_PORTSC_PSPD_MASK; + + if (phy->pdata->u_data.host.hot_plug) { + bool enable_hotplug = true; + /* if it is OTG port then make sure to enable hot-plug feature + only if host adaptor is connected, i.e id is low */ + if (phy->pdata->port_otg) { + val = readl(base + USB_PHY_VBUS_WAKEUP_ID); + enable_hotplug = (val & USB_ID_STATUS) ? false : true; + } + if (enable_hotplug) { + val = readl(base + USB_PORTSC); + val |= USB_PORTSC_WKCN; + writel(val, base + USB_PORTSC); + + val = readl(base + USB_SUSP_CTRL); + val |= USB_PHY_CLK_VALID_INT_ENB; + writel(val, base + USB_SUSP_CTRL); + } else { + /* Disable PHY clock valid interrupts while going into suspend*/ + val = readl(base + USB_SUSP_CTRL); + val &= ~USB_PHY_CLK_VALID_INT_ENB; + writel(val, base + USB_SUSP_CTRL); + } + } + + if (phy->inst == 2) { + val = readl(base + USB_PORTSC); + val |= USB_PORTSC_PHCD; + writel(val, base + USB_PORTSC); + } else { + 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 (usb_phy_reg_status_wait(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, + 0, 2500)) + pr_warn("%s: timeout waiting for phy to stabilize\n", __func__); + + utmi_phy_pad_power_off(phy); + + phy->phy_clk_on = false; + phy->hw_accessible = false; + + DBG("%s(%d) inst:[%d]END\n", __func__, __LINE__, phy->inst); + + return 0; +} + +static int utmi_phy_power_on(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + struct tegra_utmi_config *config = &phy->pdata->u_cfg.utmi; + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + if (phy->phy_clk_on) { + DBG("%s(%d) inst:[%d] phy clk is already on\n", + __func__, __LINE__, phy->inst); + return 0; + } + + val = readl(base + USB_SUSP_CTRL); + val |= UTMIP_RESET; + writel(val, base + USB_SUSP_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->pdata->op_mode == TEGRA_USB_OPMODE_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); + + val = readl(base + UTMIP_BAT_CHRG_CFG0); + val &= ~UTMIP_PD_CHRG; + writel(val, base + UTMIP_BAT_CHRG_CFG0); + } else { + val = readl(base + UTMIP_BAT_CHRG_CFG0); + val |= UTMIP_PD_CHRG; + writel(val, base + UTMIP_BAT_CHRG_CFG0); + } + + utmi_phy_pad_power_on(phy); + + val = readl(base + UTMIP_XCVR_UHSIC_HSRX_CFG0); + val &= ~(UTMIP_XCVR_LSBIAS_SEL | 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(phy->utmi_xcvr_setup); + val |= UTMIP_XCVR_SETUP_MSB(XCVR_SETUP_MSB_CALIB(phy->utmi_xcvr_setup)); + val |= UTMIP_XCVR_LSFSLEW(config->xcvr_lsfslew); + val |= UTMIP_XCVR_LSRSLEW(config->xcvr_lsrslew); + + writel(val, base + UTMIP_XCVR_UHSIC_HSRX_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_BIAS_CFG1); + val &= ~(UTMIP_BIAS_PDTRK_COUNT(~0)); + val |= UTMIP_BIAS_PDTRK_COUNT(phy->freq->pdtrk_count); + writel(val, base + UTMIP_BIAS_CFG1); + + val = readl(base + UTMIP_SPARE_CFG0); + val &= ~FUSE_SETUP_SEL; + writel(val, base + UTMIP_SPARE_CFG0); + + 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->inst == 0) { + val = readl(base + USB_SUSP_CTRL); + val &= ~USB_SUSP_SET; + writel(val, base + USB_SUSP_CTRL); + } else { + val = readl(base + USB_PORTSC); + val &= ~USB_PORTSC_PHCD; + writel(val, base + USB_PORTSC); + } + + if (usb_phy_reg_status_wait(base + USB_SUSP_CTRL, + USB_PHY_CLK_VALID, USB_PHY_CLK_VALID, 2500)) + pr_warn("%s: timeout waiting for phy to stabilize\n", __func__); + + if (phy->inst == 2) { + val = readl(base + USB_PORTSC); + val &= ~(USB_PORTSC_PTS(~0)); + writel(val, base + USB_PORTSC); + } + + phy->phy_clk_on = true; + phy->hw_accessible = true; + + return 0; +} + +static void utmi_phy_restore_start(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + val = readl(base + UTMIP_MISC_CFG0); + val &= ~(UTMIP_DPDM_OBSERVE_SEL(~0)); + + if (phy->port_speed == 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; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + val = readl(base + UTMIP_MISC_CFG0); + val &= ~UTMIP_DPDM_OBSERVE; + writel(val, base + UTMIP_MISC_CFG0); + udelay(10); +} + + +static int utmi_phy_resume(struct tegra_usb_phy *phy) +{ + int status = 0; + unsigned long val, flags; + void __iomem *base = phy->regs; + void __iomem *pad_base = IO_ADDRESS(TEGRA_USB_BASE); + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + if (phy->pdata->op_mode == TEGRA_USB_OPMODE_HOST) { + if (phy->port_speed < USB_PHY_PORT_SPEED_UNKNOWN) { + utmi_phy_restore_start(phy); + usb_phy_bringup_host_controller(phy); + utmi_phy_restore_end(phy); + } else { + /* device is plugged in when system is in LP0 */ + /* bring up the controller from LP0*/ + val = readl(base + USB_USBCMD); + val |= USB_USBCMD_RESET; + writel(val, base + USB_USBCMD); + + if (usb_phy_reg_status_wait(base + USB_USBCMD, + USB_USBCMD_RESET, 0, 2500) < 0) { + pr_err("%s: timeout waiting for reset\n", __func__); + } + + val = readl(base + USB_USBMODE_REG_OFFSET); + val &= ~USB_USBMODE_MASK; + val |= USB_USBMODE_HOST; + writel(val, base + USB_USBMODE_REG_OFFSET); + + if (phy->inst == 2) { + val = readl(base + USB_PORTSC); + val &= ~USB_PORTSC_PTS(~0); + writel(val, base + USB_PORTSC); + } + writel(USB_USBCMD_RS, base + USB_USBCMD); + + if (usb_phy_reg_status_wait(base + USB_USBCMD, + USB_USBCMD_RS, USB_USBCMD_RS, 2500) < 0) { + pr_err("%s: timeout waiting for run bit\n", __func__); + } + + /* Enable Port Power */ + val = readl(base + USB_PORTSC); + val |= USB_PORTSC_PP; + writel(val, base + USB_PORTSC); + udelay(10); + + DBG("USB_USBSTS[0x%x] USB_PORTSC[0x%x]\n", + readl(base + USB_USBSTS), readl(base + USB_PORTSC)); + } + } else { + /* Restoring the pad powers */ + clk_enable(phy->utmi_pad_clk); + + spin_lock_irqsave(&utmip_pad_lock, flags); + + val = readl(pad_base + UTMIP_BIAS_CFG0); + if (utmip_pad_state_on) + val &= ~(UTMIP_OTGPD | UTMIP_BIASPD); + else + val |= (UTMIP_OTGPD | UTMIP_BIASPD); + writel(val, pad_base + UTMIP_BIAS_CFG0); + + spin_unlock_irqrestore(&utmip_pad_lock, flags); + clk_disable(phy->utmi_pad_clk); + } + + return status; +} + +static bool utmi_phy_charger_detect(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + bool status; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + /* Enable charger detection logic */ + val = readl(base + UTMIP_BAT_CHRG_CFG0); + val |= UTMIP_OP_SRC_EN | UTMIP_ON_SINK_EN; + writel(val, base + UTMIP_BAT_CHRG_CFG0); + + /* Source should be on for 100 ms as per USB charging spec */ + msleep(TDP_SRC_ON_MS); + + val = readl(base + USB_PHY_VBUS_WAKEUP_ID); + /* If charger is not connected disable the interrupt */ + val &= ~VDAT_DET_INT_EN; + val |= VDAT_DET_CHG_DET; + writel(val, base + USB_PHY_VBUS_WAKEUP_ID); + + val = readl(base + USB_PHY_VBUS_WAKEUP_ID); + if (val & VDAT_DET_STS) + status = true; + else + status = false; + + /* Disable charger detection logic */ + val = readl(base + UTMIP_BAT_CHRG_CFG0); + val &= ~(UTMIP_OP_SRC_EN | UTMIP_ON_SINK_EN); + writel(val, base + UTMIP_BAT_CHRG_CFG0); + + /* Delay of 40 ms before we pull the D+ as per battery charger spec */ + msleep(TDPSRC_CON_MS); + + return status; +} + + +static int uhsic_phy_open(struct tegra_usb_phy *phy) +{ + unsigned long parent_rate; + int i; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + parent_rate = clk_get_rate(clk_get_parent(phy->pllu_clk)); + for (i = 0; i < ARRAY_SIZE(uhsic_freq_table); i++) { + if (uhsic_freq_table[i].freq == parent_rate) { + phy->freq = &uhsic_freq_table[i]; + break; + } + } + if (!phy->freq) { + pr_err("invalid pll_u parent rate %ld\n", parent_rate); + return -EINVAL; + } + + return 0; +} + +static int uhsic_phy_irq(struct tegra_usb_phy *phy) +{ + usb_phy_fence_read(phy); + return IRQ_HANDLED; +} + +static int uhsic_phy_power_on(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + struct tegra_hsic_config *config = &phy->pdata->u_cfg.hsic; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + if (phy->phy_clk_on) { + DBG("%s(%d) inst:[%d] phy clk is already On\n", __func__, + __LINE__, phy->inst); + return 0; + } + + val = readl(base + UHSIC_PADS_CFG1); + val &= ~(UHSIC_PD_BG | UHSIC_PD_TX | UHSIC_PD_TRK | UHSIC_PD_RX | + UHSIC_PD_ZI | UHSIC_RPD_DATA | UHSIC_RPD_STROBE); + val |= UHSIC_RX_SEL; + writel(val, base + UHSIC_PADS_CFG1); + udelay(2); + + val = readl(base + USB_SUSP_CTRL); + val |= UHSIC_RESET; + writel(val, base + USB_SUSP_CTRL); + udelay(30); + + val = readl(base + USB_SUSP_CTRL); + val |= UHSIC_PHY_ENABLE; + writel(val, base + USB_SUSP_CTRL); + + val = readl(base + UTMIP_XCVR_UHSIC_HSRX_CFG0); + val |= UHSIC_IDLE_WAIT(config->idle_wait_delay); + val |= UHSIC_ELASTIC_UNDERRUN_LIMIT(config->elastic_underrun_limit); + val |= UHSIC_ELASTIC_OVERRUN_LIMIT(config->elastic_overrun_limit); + writel(val, base + UTMIP_XCVR_UHSIC_HSRX_CFG0); + + val = readl(base + UHSIC_HSRX_CFG1); + val |= UHSIC_HS_SYNC_START_DLY(config->sync_start_delay); + writel(val, base + UHSIC_HSRX_CFG1); + + val = readl(base + UHSIC_MISC_CFG0); + val |= UHSIC_SUSPEND_EXIT_ON_EDGE; + writel(val, base + UHSIC_MISC_CFG0); + + val = readl(base + UHSIC_MISC_CFG1); + val |= UHSIC_PLLU_STABLE_COUNT(phy->freq->stable_count); + writel(val, base + UHSIC_MISC_CFG1); + + val = readl(base + UHSIC_PLL_CFG1); + val |= UHSIC_PLLU_ENABLE_DLY_COUNT(phy->freq->enable_delay); + val |= UHSIC_XTAL_FREQ_COUNT(phy->freq->xtal_freq_count); + writel(val, base + UHSIC_PLL_CFG1); + + val = readl(base + USB_SUSP_CTRL); + val &= ~(UHSIC_RESET); + writel(val, base + USB_SUSP_CTRL); + udelay(2); + + val = readl(base + USB_PORTSC); + val &= ~(USB_PORTSC_PTS(~0)); + writel(val, base + USB_PORTSC); + + val = readl(base + USB_TXFILLTUNING); + if ((val & USB_FIFO_TXFILL_MASK) != USB_FIFO_TXFILL_THRES(0x10)) { + val = USB_FIFO_TXFILL_THRES(0x10); + writel(val, base + USB_TXFILLTUNING); + } + + val = readl(base + USB_PORTSC); + val &= ~(USB_PORTSC_WKOC | USB_PORTSC_WKDS | USB_PORTSC_WKCN); + writel(val, base + USB_PORTSC); + + val = readl(base + UHSIC_PADS_CFG0); + val &= ~(UHSIC_TX_RTUNEN); + /* set Rtune impedance to 40 ohm */ + val |= UHSIC_TX_RTUNE(0); + writel(val, base + UHSIC_PADS_CFG0); + + if (usb_phy_reg_status_wait(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, + USB_PHY_CLK_VALID, 2500)) { + pr_err("%s: timeout waiting for phy to stabilize\n", __func__); + return -ETIMEDOUT; + } + + phy->phy_clk_on = true; + phy->hw_accessible = true; + + return 0; +} + +static int uhsic_phy_power_off(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + if (!phy->phy_clk_on) { + DBG("%s(%d) inst:[%d] phy clk is already off\n", __func__, + __LINE__, phy->inst); + return 0; + } + + val = readl(base + UHSIC_PADS_CFG1); + val &= ~UHSIC_RPU_STROBE; + val |= UHSIC_RPD_STROBE; + writel(val, base + UHSIC_PADS_CFG1); + + val = readl(base + USB_SUSP_CTRL); + val |= UHSIC_RESET; + writel(val, base + USB_SUSP_CTRL); + udelay(30); + + val = readl(base + USB_SUSP_CTRL); + val &= ~UHSIC_PHY_ENABLE; + writel(val, base + USB_SUSP_CTRL); + + phy->phy_clk_on = false; + phy->hw_accessible = false; + + return 0; +} + +static int uhsic_phy_bus_port_power(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + + val = readl(base + UHSIC_MISC_CFG0); + val |= UHSIC_DETECT_SHORT_CONNECT; + writel(val, base + UHSIC_MISC_CFG0); + udelay(1); + + val = readl(base + UHSIC_MISC_CFG0); + val |= UHSIC_FORCE_XCVR_MODE; + writel(val, base + UHSIC_MISC_CFG0); + + val = readl(base + UHSIC_PADS_CFG1); + val &= ~UHSIC_RPD_STROBE; + val |= UHSIC_RPU_STROBE; + writel(val, base + UHSIC_PADS_CFG1); + + val = readl(base + USB_USBCMD); + val &= ~USB_USBCMD_RS; + writel(val, base + USB_USBCMD); + + if (usb_phy_reg_status_wait(base + UHSIC_STAT_CFG0, + UHSIC_CONNECT_DETECT, UHSIC_CONNECT_DETECT, 2000)) { + pr_err("%s: timeout waiting for UHSIC_CONNECT_DETECT\n", + __func__); + return -ETIMEDOUT; + } + +/* FIXME : need to check whether this piece is required or not + if (usb_phy_reg_status_wait(base + USB_PORTSC, USB_PORTSC_LS(2), + USB_PORTSC_LS(2), 2000)) { + pr_err("%s: timeout waiting for dplus state\n", __func__); + return -ETIMEDOUT; + } +*/ + return 0; +} + + +static int uhsic_phy_bus_reset(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + + val = readl(base + USB_PORTSC); + val |= USB_PORTSC_PTC(5); + writel(val, base + USB_PORTSC); + udelay(2); + + val = readl(base + USB_PORTSC); + val &= ~(USB_PORTSC_PTC(~0)); + writel(val, base + USB_PORTSC); + udelay(2); + + if (usb_phy_reg_status_wait(base + USB_PORTSC, USB_PORTSC_LS(0), + 0, 2000)) { + pr_err("%s: timeout waiting for USB_PORTSC_LS\n", __func__); + return -ETIMEDOUT; + } + + /* Poll until CCS is enabled */ + if (usb_phy_reg_status_wait(base + USB_PORTSC, USB_PORTSC_CCS, + USB_PORTSC_CCS, 2000)) { + pr_err("%s: timeout waiting for USB_PORTSC_CCS\n", __func__); + return -ETIMEDOUT; + } + + if (usb_phy_reg_status_wait(base + USB_PORTSC, USB_PORTSC_PSPD(2), + USB_PORTSC_PSPD(2), 2000)) { + pr_err("%s: timeout waiting for USB_PORTSC_PSPD\n", __func__); + return -ETIMEDOUT; + } + + val = readl(base + USB_USBCMD); + val &= ~USB_USBCMD_RS; + writel(val, base + USB_USBCMD); + + if (usb_phy_reg_status_wait(base + USB_USBSTS, USB_USBSTS_HCH, + USB_USBSTS_HCH, 2000)) { + pr_err("%s: timeout waiting for USB_USBSTS_HCH\n", __func__); + return -ETIMEDOUT; + } + + val = readl(base + UHSIC_PADS_CFG1); + val &= ~UHSIC_RPU_STROBE; + val |= UHSIC_RPD_STROBE; + writel(val, base + UHSIC_PADS_CFG1); + + mdelay(50); + + val = readl(base + UHSIC_PADS_CFG1); + val &= ~UHSIC_RPD_STROBE; + val |= UHSIC_RPU_STROBE; + writel(val, base + UHSIC_PADS_CFG1); + + val = readl(base + USB_USBCMD); + val |= USB_USBCMD_RS; + writel(val, base + USB_USBCMD); + + val = readl(base + UHSIC_PADS_CFG1); + val &= ~UHSIC_RPU_STROBE; + writel(val, base + UHSIC_PADS_CFG1); + + if (usb_phy_reg_status_wait(base + USB_USBCMD, USB_USBCMD_RS, + USB_USBCMD_RS, 2000)) { + pr_err("%s: timeout waiting for USB_USBCMD_RS\n", __func__); + return -ETIMEDOUT; + } + + return 0; +} + + +static int uhsic_phy_pre_resume(struct tegra_usb_phy *phy, bool remote_wakeup) +{ + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + usb_phy_wait_for_sof(phy); + + return 0; +} + +static int uhsic_phy_resume(struct tegra_usb_phy *phy) +{ + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + uhsic_phy_bus_port_power(phy); + + return 0; +} + + +static int uhsic_phy_post_resume(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + val = readl(base + USB_TXFILLTUNING); + if ((val & USB_FIFO_TXFILL_MASK) != USB_FIFO_TXFILL_THRES(0x10)) { + val = USB_FIFO_TXFILL_THRES(0x10); + writel(val, base + USB_TXFILLTUNING); + } + + return 0; +} + +static void ulpi_set_trimmer(struct tegra_usb_phy *phy) +{ + struct tegra_ulpi_config *config = &phy->pdata->u_cfg.ulpi; + void __iomem *base = phy->regs; + unsigned long val; + + val = ULPI_DATA_TRIMMER_SEL(config->data_trimmer); + val |= ULPI_STPDIRNXT_TRIMMER_SEL(config->stpdirnxt_trimmer); + val |= ULPI_DIR_TRIMMER_SEL(config->dir_trimmer); + 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); +} + + +static int ulpi_link_phy_open(struct tegra_usb_phy *phy) +{ + struct tegra_ulpi_config *config = &phy->pdata->u_cfg.ulpi; + int err = 0; + + phy->ulpi_clk = NULL; + + if (config->clk) { + phy->ulpi_clk = clk_get_sys(NULL, config->clk); + if (IS_ERR(phy->ulpi_clk)) { + pr_err("%s: can't get ulpi clock\n", __func__); + err = -ENXIO; + } + } + + phy->ulpi_vp = otg_ulpi_create(&ulpi_viewport_access_ops, 0); + phy->ulpi_vp->io_priv = phy->regs + ULPI_VIEWPORT; + + return err; +} + +static void ulpi_link_phy_close(struct tegra_usb_phy *phy) +{ + DBG("%s inst:[%d]\n", __func__, phy->inst); + if (phy->ulpi_clk) + clk_put(phy->ulpi_clk); +} + +static int ulpi_link_phy_irq(struct tegra_usb_phy *phy) +{ + usb_phy_fence_read(phy); + return IRQ_HANDLED; +} + +static int ulpi_link_phy_power_off(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + int ret; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + if (!phy->phy_clk_on) { + DBG("%s(%d) inst:[%d] phy clk is already off\n", __func__, + __LINE__, phy->inst); + return 0; + } + + /* Disable VbusValid, SessEnd comparators */ + ret = otg_io_write(phy->ulpi_vp, 0x00, 0x0D); + if (ret) + pr_err("%s: ulpi write 0x0D failed\n", __func__); + + ret = otg_io_write(phy->ulpi_vp, 0x00, 0x10); + if (ret) + pr_err("%s: ulpi write 0x10 failed\n", __func__); + + /* Disable IdFloat comparator */ + ret = otg_io_write(phy->ulpi_vp, 0x00, 0x19); + if (ret) + pr_err("%s: ulpi write 0x19 failed\n", __func__); + + ret = otg_io_write(phy->ulpi_vp, 0x00, 0x1D); + if (ret) + pr_err("%s: ulpi write 0x1D failed\n", __func__); + + phy->port_speed = (readl(base + USB_PORTSC) >> 26) & + USB_PORTSC_PSPD_MASK; + + /* 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_PORTSC); + val &= ~(USB_PORTSC_WKOC | USB_PORTSC_WKDS | USB_PORTSC_WKCN); + writel(val, base + USB_PORTSC); + + /* Put the PHY in the low power mode */ + val = readl(base + USB_PORTSC); + val |= USB_PORTSC_PHCD; + writel(val, base + USB_PORTSC); + + if (usb_phy_reg_status_wait(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, + 0, 2500)) { + pr_err("%s: timeout waiting for phy to stop\n", __func__); + } + + if (phy->ulpi_clk) + clk_disable(phy->ulpi_clk); + + phy->phy_clk_on = false; + phy->hw_accessible = false; + + return 0; +} + +static int ulpi_link_phy_power_on(struct tegra_usb_phy *phy) +{ + int ret; + unsigned long val; + void __iomem *base = phy->regs; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + if (phy->phy_clk_on) { + DBG("%s(%d) inst:[%d] phy clk is already On\n", __func__, + __LINE__, phy->inst); + return 0; + } + + if (phy->ulpi_clk) { + clk_enable(phy->ulpi_clk); + mdelay(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 = readl(base + USB_SUSP_CTRL); + val |= USB_SUSP_CLR; + writel(val, base + USB_SUSP_CTRL); + + if (usb_phy_reg_status_wait(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, + USB_PHY_CLK_VALID, 2500)) + pr_err("%s: timeout waiting for phy to stabilize\n", __func__); + + if (usb_phy_reg_status_wait(base + USB_SUSP_CTRL, USB_CLKEN, + USB_CLKEN, 2500)) + pr_err("%s: timeout waiting for AHB clock\n", __func__); + + val = readl(base + USB_SUSP_CTRL); + val &= ~USB_SUSP_CLR; + writel(val, base + USB_SUSP_CTRL); + + val = 0; + writel(val, base + ULPI_TIMING_CTRL_1); + + ulpi_set_trimmer(phy); + + /* Fix VbusInvalid due to floating VBUS */ + ret = otg_io_write(phy->ulpi_vp, 0x40, 0x08); + if (ret) { + pr_err("%s: ulpi write failed\n", __func__); + return ret; + } + + ret = otg_io_write(phy->ulpi_vp, 0x80, 0x0B); + if (ret) { + pr_err("%s: ulpi write failed\n", __func__); + return ret; + } + + val = readl(base + USB_PORTSC); + val |= USB_PORTSC_WKOC | USB_PORTSC_WKDS | USB_PORTSC_WKCN; + writel(val, base + USB_PORTSC); + + phy->phy_clk_on = true; + phy->hw_accessible = true; + + return 0; +} + +static inline void ulpi_link_phy_set_tristate(bool enable) +{ +#ifdef CONFIG_ARCH_TEGRA_2x_SOC + int tristate = (enable) ? TEGRA_TRI_TRISTATE : TEGRA_TRI_NORMAL; + + tegra_pinmux_set_tristate(TEGRA_PINGROUP_UAA, tristate); + tegra_pinmux_set_tristate(TEGRA_PINGROUP_UAB, tristate); + tegra_pinmux_set_tristate(TEGRA_PINGROUP_UDA, tristate); +#endif +} + +static void ulpi_link_phy_restore_start(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + + /*Tristate ulpi interface before USB controller resume*/ + ulpi_link_phy_set_tristate(true); + + val = readl(base + ULPI_TIMING_CTRL_0); + val &= ~ULPI_OUTPUT_PINMUX_BYP; + writel(val, base + ULPI_TIMING_CTRL_0); +} + +static void ulpi_link_phy_restore_end(struct tegra_usb_phy *phy) +{ + unsigned long val; + void __iomem *base = phy->regs; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + + val = readl(base + ULPI_TIMING_CTRL_0); + val |= ULPI_OUTPUT_PINMUX_BYP; + writel(val, base + ULPI_TIMING_CTRL_0); + + ulpi_link_phy_set_tristate(false); +} + +static int ulpi_link_phy_resume(struct tegra_usb_phy *phy) +{ + int status = 0; + + DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); + if (phy->pdata->u_data.host.power_off_on_suspend) { + status = ulpi_link_phy_power_on(phy); + if (phy->port_speed < USB_PHY_PORT_SPEED_UNKNOWN) { + ulpi_link_phy_restore_start(phy); + usb_phy_bringup_host_controller(phy); + ulpi_link_phy_restore_end(phy); + } + } + + return status; +} + +static struct tegra_usb_phy_ops utmi_phy_ops = { + .open = utmi_phy_open, + .close = utmi_phy_close, + .irq = utmi_phy_irq, + .power_on = utmi_phy_power_on, + .power_off = utmi_phy_power_off, + .pre_resume = utmi_phy_pre_resume, + .resume = utmi_phy_resume, + .post_resume = utmi_phy_post_resume, + .charger_detect = utmi_phy_charger_detect, +}; + +static struct tegra_usb_phy_ops uhsic_phy_ops = { + .open = uhsic_phy_open, + .irq = uhsic_phy_irq, + .power_on = uhsic_phy_power_on, + .power_off = uhsic_phy_power_off, + .pre_resume = uhsic_phy_pre_resume, + .resume = uhsic_phy_resume, + .post_resume = uhsic_phy_post_resume, + .port_power = uhsic_phy_bus_port_power, + .bus_reset = uhsic_phy_bus_reset, +}; + +static struct tegra_usb_phy_ops ulpi_link_phy_ops = { + .open = ulpi_link_phy_open, + .close = ulpi_link_phy_close, + .irq = ulpi_link_phy_irq, + .power_on = ulpi_link_phy_power_on, + .power_off = ulpi_link_phy_power_off, + .resume = ulpi_link_phy_resume, +}; + +static struct tegra_usb_phy_ops ulpi_null_phy_ops; +static struct tegra_usb_phy_ops icusb_phy_ops; + + +static struct tegra_usb_phy_ops *phy_ops[] = { + [TEGRA_USB_PHY_INTF_UTMI] = &utmi_phy_ops, + [TEGRA_USB_PHY_INTF_ULPI_LINK] = &ulpi_link_phy_ops, + [TEGRA_USB_PHY_INTF_ULPI_NULL] = &ulpi_null_phy_ops, + [TEGRA_USB_PHY_INTF_HSIC] = &uhsic_phy_ops, + [TEGRA_USB_PHY_INTF_ICUSB] = &icusb_phy_ops, +}; + +int tegra2_usb_phy_init_ops(struct tegra_usb_phy *phy) +{ + phy->ops = phy_ops[phy->pdata->phy_intf]; + + return 0; +} |