![Heikki Krogerus](/assets/img/avatar_default.png)
By using the unified device property interface, the function can be made available for all platforms and not just the ones using DT. Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
1091 lines
28 KiB
C
1091 lines
28 KiB
C
/*
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* Copyright (C) 2010 Google, Inc.
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* Copyright (C) 2013 NVIDIA Corporation
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*
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* Author:
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* Erik Gilling <konkers@google.com>
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* Benoit Goby <benoit@android.com>
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* Venu Byravarasu <vbyravarasu@nvidia.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/resource.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/export.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/gpio.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/usb/otg.h>
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#include <linux/usb/ulpi.h>
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#include <linux/usb/of.h>
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#include <linux/usb/ehci_def.h>
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#include <linux/usb/tegra_usb_phy.h>
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#include <linux/regulator/consumer.h>
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#define ULPI_VIEWPORT 0x170
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/* PORTSC PTS/PHCD bits, Tegra20 only */
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#define TEGRA_USB_PORTSC1 0x184
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#define TEGRA_USB_PORTSC1_PTS(x) (((x) & 0x3) << 30)
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#define TEGRA_USB_PORTSC1_PHCD (1 << 23)
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/* HOSTPC1 PTS/PHCD bits, Tegra30 and above */
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#define TEGRA_USB_HOSTPC1_DEVLC 0x1b4
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#define TEGRA_USB_HOSTPC1_DEVLC_PTS(x) (((x) & 0x7) << 29)
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#define TEGRA_USB_HOSTPC1_DEVLC_PHCD (1 << 22)
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/* Bits of PORTSC1, which will get cleared by writing 1 into them */
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#define TEGRA_PORTSC1_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC)
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#define USB_SUSP_CTRL 0x400
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#define USB_WAKE_ON_CNNT_EN_DEV (1 << 3)
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#define USB_WAKE_ON_DISCON_EN_DEV (1 << 4)
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#define USB_SUSP_CLR (1 << 5)
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#define USB_PHY_CLK_VALID (1 << 7)
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#define UTMIP_RESET (1 << 11)
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#define UHSIC_RESET (1 << 11)
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#define UTMIP_PHY_ENABLE (1 << 12)
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#define ULPI_PHY_ENABLE (1 << 13)
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#define USB_SUSP_SET (1 << 14)
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#define USB_WAKEUP_DEBOUNCE_COUNT(x) (((x) & 0x7) << 16)
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#define USB1_LEGACY_CTRL 0x410
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#define USB1_NO_LEGACY_MODE (1 << 0)
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#define USB1_VBUS_SENSE_CTL_MASK (3 << 1)
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#define USB1_VBUS_SENSE_CTL_VBUS_WAKEUP (0 << 1)
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#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD_OR_VBUS_WAKEUP \
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(1 << 1)
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#define USB1_VBUS_SENSE_CTL_AB_SESS_VLD (2 << 1)
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#define USB1_VBUS_SENSE_CTL_A_SESS_VLD (3 << 1)
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#define ULPI_TIMING_CTRL_0 0x424
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#define ULPI_OUTPUT_PINMUX_BYP (1 << 10)
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#define ULPI_CLKOUT_PINMUX_BYP (1 << 11)
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#define ULPI_TIMING_CTRL_1 0x428
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#define ULPI_DATA_TRIMMER_LOAD (1 << 0)
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#define ULPI_DATA_TRIMMER_SEL(x) (((x) & 0x7) << 1)
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#define ULPI_STPDIRNXT_TRIMMER_LOAD (1 << 16)
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#define ULPI_STPDIRNXT_TRIMMER_SEL(x) (((x) & 0x7) << 17)
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#define ULPI_DIR_TRIMMER_LOAD (1 << 24)
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#define ULPI_DIR_TRIMMER_SEL(x) (((x) & 0x7) << 25)
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#define UTMIP_PLL_CFG1 0x804
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#define UTMIP_XTAL_FREQ_COUNT(x) (((x) & 0xfff) << 0)
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#define UTMIP_PLLU_ENABLE_DLY_COUNT(x) (((x) & 0x1f) << 27)
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#define UTMIP_XCVR_CFG0 0x808
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#define UTMIP_XCVR_SETUP(x) (((x) & 0xf) << 0)
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#define UTMIP_XCVR_SETUP_MSB(x) ((((x) & 0x70) >> 4) << 22)
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#define UTMIP_XCVR_LSRSLEW(x) (((x) & 0x3) << 8)
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#define UTMIP_XCVR_LSFSLEW(x) (((x) & 0x3) << 10)
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#define UTMIP_FORCE_PD_POWERDOWN (1 << 14)
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#define UTMIP_FORCE_PD2_POWERDOWN (1 << 16)
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#define UTMIP_FORCE_PDZI_POWERDOWN (1 << 18)
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#define UTMIP_XCVR_LSBIAS_SEL (1 << 21)
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#define UTMIP_XCVR_HSSLEW(x) (((x) & 0x3) << 4)
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#define UTMIP_XCVR_HSSLEW_MSB(x) ((((x) & 0x1fc) >> 2) << 25)
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#define UTMIP_BIAS_CFG0 0x80c
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#define UTMIP_OTGPD (1 << 11)
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#define UTMIP_BIASPD (1 << 10)
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#define UTMIP_HSSQUELCH_LEVEL(x) (((x) & 0x3) << 0)
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#define UTMIP_HSDISCON_LEVEL(x) (((x) & 0x3) << 2)
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#define UTMIP_HSDISCON_LEVEL_MSB(x) ((((x) & 0x4) >> 2) << 24)
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#define UTMIP_HSRX_CFG0 0x810
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#define UTMIP_ELASTIC_LIMIT(x) (((x) & 0x1f) << 10)
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#define UTMIP_IDLE_WAIT(x) (((x) & 0x1f) << 15)
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#define UTMIP_HSRX_CFG1 0x814
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#define UTMIP_HS_SYNC_START_DLY(x) (((x) & 0x1f) << 1)
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#define UTMIP_TX_CFG0 0x820
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#define UTMIP_FS_PREABMLE_J (1 << 19)
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#define UTMIP_HS_DISCON_DISABLE (1 << 8)
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#define UTMIP_MISC_CFG0 0x824
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#define UTMIP_DPDM_OBSERVE (1 << 26)
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#define UTMIP_DPDM_OBSERVE_SEL(x) (((x) & 0xf) << 27)
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#define UTMIP_DPDM_OBSERVE_SEL_FS_J UTMIP_DPDM_OBSERVE_SEL(0xf)
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#define UTMIP_DPDM_OBSERVE_SEL_FS_K UTMIP_DPDM_OBSERVE_SEL(0xe)
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#define UTMIP_DPDM_OBSERVE_SEL_FS_SE1 UTMIP_DPDM_OBSERVE_SEL(0xd)
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#define UTMIP_DPDM_OBSERVE_SEL_FS_SE0 UTMIP_DPDM_OBSERVE_SEL(0xc)
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#define UTMIP_SUSPEND_EXIT_ON_EDGE (1 << 22)
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#define UTMIP_MISC_CFG1 0x828
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#define UTMIP_PLL_ACTIVE_DLY_COUNT(x) (((x) & 0x1f) << 18)
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#define UTMIP_PLLU_STABLE_COUNT(x) (((x) & 0xfff) << 6)
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#define UTMIP_DEBOUNCE_CFG0 0x82c
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#define UTMIP_BIAS_DEBOUNCE_A(x) (((x) & 0xffff) << 0)
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#define UTMIP_BAT_CHRG_CFG0 0x830
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#define UTMIP_PD_CHRG (1 << 0)
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#define UTMIP_SPARE_CFG0 0x834
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#define FUSE_SETUP_SEL (1 << 3)
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#define UTMIP_XCVR_CFG1 0x838
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#define UTMIP_FORCE_PDDISC_POWERDOWN (1 << 0)
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#define UTMIP_FORCE_PDCHRP_POWERDOWN (1 << 2)
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#define UTMIP_FORCE_PDDR_POWERDOWN (1 << 4)
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#define UTMIP_XCVR_TERM_RANGE_ADJ(x) (((x) & 0xf) << 18)
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#define UTMIP_BIAS_CFG1 0x83c
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#define UTMIP_BIAS_PDTRK_COUNT(x) (((x) & 0x1f) << 3)
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/* For Tegra30 and above only, the address is different in Tegra20 */
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#define USB_USBMODE 0x1f8
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#define USB_USBMODE_MASK (3 << 0)
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#define USB_USBMODE_HOST (3 << 0)
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#define USB_USBMODE_DEVICE (2 << 0)
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static DEFINE_SPINLOCK(utmip_pad_lock);
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static int utmip_pad_count;
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struct tegra_xtal_freq {
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int freq;
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u8 enable_delay;
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u8 stable_count;
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u8 active_delay;
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u8 xtal_freq_count;
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u16 debounce;
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};
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static const struct tegra_xtal_freq tegra_freq_table[] = {
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{
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.freq = 12000000,
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.enable_delay = 0x02,
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.stable_count = 0x2F,
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.active_delay = 0x04,
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.xtal_freq_count = 0x76,
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.debounce = 0x7530,
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},
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{
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.freq = 13000000,
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.enable_delay = 0x02,
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.stable_count = 0x33,
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.active_delay = 0x05,
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.xtal_freq_count = 0x7F,
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.debounce = 0x7EF4,
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},
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{
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.freq = 19200000,
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.enable_delay = 0x03,
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.stable_count = 0x4B,
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.active_delay = 0x06,
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.xtal_freq_count = 0xBB,
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.debounce = 0xBB80,
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},
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{
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.freq = 26000000,
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.enable_delay = 0x04,
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.stable_count = 0x66,
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.active_delay = 0x09,
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.xtal_freq_count = 0xFE,
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.debounce = 0xFDE8,
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},
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};
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static void set_pts(struct tegra_usb_phy *phy, u8 pts_val)
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{
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void __iomem *base = phy->regs;
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unsigned long val;
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if (phy->soc_config->has_hostpc) {
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val = readl(base + TEGRA_USB_HOSTPC1_DEVLC);
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val &= ~TEGRA_USB_HOSTPC1_DEVLC_PTS(~0);
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val |= TEGRA_USB_HOSTPC1_DEVLC_PTS(pts_val);
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writel(val, base + TEGRA_USB_HOSTPC1_DEVLC);
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} else {
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val = readl(base + TEGRA_USB_PORTSC1) & ~TEGRA_PORTSC1_RWC_BITS;
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val &= ~TEGRA_USB_PORTSC1_PTS(~0);
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val |= TEGRA_USB_PORTSC1_PTS(pts_val);
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writel(val, base + TEGRA_USB_PORTSC1);
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}
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}
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static void set_phcd(struct tegra_usb_phy *phy, bool enable)
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{
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void __iomem *base = phy->regs;
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unsigned long val;
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if (phy->soc_config->has_hostpc) {
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val = readl(base + TEGRA_USB_HOSTPC1_DEVLC);
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if (enable)
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val |= TEGRA_USB_HOSTPC1_DEVLC_PHCD;
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else
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val &= ~TEGRA_USB_HOSTPC1_DEVLC_PHCD;
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writel(val, base + TEGRA_USB_HOSTPC1_DEVLC);
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} else {
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val = readl(base + TEGRA_USB_PORTSC1) & ~PORT_RWC_BITS;
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if (enable)
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val |= TEGRA_USB_PORTSC1_PHCD;
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else
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val &= ~TEGRA_USB_PORTSC1_PHCD;
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writel(val, base + TEGRA_USB_PORTSC1);
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}
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}
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static int utmip_pad_open(struct tegra_usb_phy *phy)
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{
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phy->pad_clk = devm_clk_get(phy->u_phy.dev, "utmi-pads");
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if (IS_ERR(phy->pad_clk)) {
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pr_err("%s: can't get utmip pad clock\n", __func__);
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return PTR_ERR(phy->pad_clk);
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}
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return 0;
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}
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static void utmip_pad_power_on(struct tegra_usb_phy *phy)
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{
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unsigned long val, flags;
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void __iomem *base = phy->pad_regs;
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struct tegra_utmip_config *config = phy->config;
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clk_prepare_enable(phy->pad_clk);
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spin_lock_irqsave(&utmip_pad_lock, flags);
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if (utmip_pad_count++ == 0) {
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val = readl(base + UTMIP_BIAS_CFG0);
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val &= ~(UTMIP_OTGPD | UTMIP_BIASPD);
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if (phy->soc_config->requires_extra_tuning_parameters) {
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val &= ~(UTMIP_HSSQUELCH_LEVEL(~0) |
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UTMIP_HSDISCON_LEVEL(~0) |
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UTMIP_HSDISCON_LEVEL_MSB(~0));
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val |= UTMIP_HSSQUELCH_LEVEL(config->hssquelch_level);
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val |= UTMIP_HSDISCON_LEVEL(config->hsdiscon_level);
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val |= UTMIP_HSDISCON_LEVEL_MSB(config->hsdiscon_level);
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}
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writel(val, base + UTMIP_BIAS_CFG0);
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}
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spin_unlock_irqrestore(&utmip_pad_lock, flags);
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clk_disable_unprepare(phy->pad_clk);
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}
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static int utmip_pad_power_off(struct tegra_usb_phy *phy)
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{
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unsigned long val, flags;
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void __iomem *base = phy->pad_regs;
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if (!utmip_pad_count) {
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pr_err("%s: utmip pad already powered off\n", __func__);
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return -EINVAL;
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}
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clk_prepare_enable(phy->pad_clk);
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spin_lock_irqsave(&utmip_pad_lock, flags);
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if (--utmip_pad_count == 0) {
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val = readl(base + UTMIP_BIAS_CFG0);
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val |= UTMIP_OTGPD | UTMIP_BIASPD;
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writel(val, base + UTMIP_BIAS_CFG0);
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}
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spin_unlock_irqrestore(&utmip_pad_lock, flags);
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clk_disable_unprepare(phy->pad_clk);
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return 0;
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}
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static int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
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{
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unsigned long timeout = 2000;
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do {
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if ((readl(reg) & mask) == result)
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return 0;
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udelay(1);
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timeout--;
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} while (timeout);
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return -1;
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}
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static void utmi_phy_clk_disable(struct tegra_usb_phy *phy)
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{
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unsigned long val;
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void __iomem *base = phy->regs;
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if (phy->is_legacy_phy) {
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val = readl(base + USB_SUSP_CTRL);
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val |= USB_SUSP_SET;
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writel(val, base + USB_SUSP_CTRL);
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udelay(10);
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val = readl(base + USB_SUSP_CTRL);
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val &= ~USB_SUSP_SET;
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writel(val, base + USB_SUSP_CTRL);
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} else
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set_phcd(phy, true);
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if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID, 0) < 0)
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pr_err("%s: timeout waiting for phy to stabilize\n", __func__);
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}
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static void utmi_phy_clk_enable(struct tegra_usb_phy *phy)
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{
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unsigned long val;
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void __iomem *base = phy->regs;
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if (phy->is_legacy_phy) {
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val = readl(base + USB_SUSP_CTRL);
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val |= USB_SUSP_CLR;
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writel(val, base + USB_SUSP_CTRL);
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udelay(10);
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val = readl(base + USB_SUSP_CTRL);
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val &= ~USB_SUSP_CLR;
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writel(val, base + USB_SUSP_CTRL);
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} else
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set_phcd(phy, false);
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if (utmi_wait_register(base + USB_SUSP_CTRL, USB_PHY_CLK_VALID,
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USB_PHY_CLK_VALID))
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pr_err("%s: timeout waiting for phy to stabilize\n", __func__);
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}
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static int utmi_phy_power_on(struct tegra_usb_phy *phy)
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{
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unsigned long val;
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void __iomem *base = phy->regs;
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struct tegra_utmip_config *config = phy->config;
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val = readl(base + USB_SUSP_CTRL);
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val |= UTMIP_RESET;
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writel(val, base + USB_SUSP_CTRL);
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if (phy->is_legacy_phy) {
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val = readl(base + USB1_LEGACY_CTRL);
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val |= USB1_NO_LEGACY_MODE;
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writel(val, base + USB1_LEGACY_CTRL);
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}
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val = readl(base + UTMIP_TX_CFG0);
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val |= UTMIP_FS_PREABMLE_J;
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writel(val, base + UTMIP_TX_CFG0);
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val = readl(base + UTMIP_HSRX_CFG0);
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val &= ~(UTMIP_IDLE_WAIT(~0) | UTMIP_ELASTIC_LIMIT(~0));
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val |= UTMIP_IDLE_WAIT(config->idle_wait_delay);
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val |= UTMIP_ELASTIC_LIMIT(config->elastic_limit);
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writel(val, base + UTMIP_HSRX_CFG0);
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val = readl(base + UTMIP_HSRX_CFG1);
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val &= ~UTMIP_HS_SYNC_START_DLY(~0);
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val |= UTMIP_HS_SYNC_START_DLY(config->hssync_start_delay);
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writel(val, base + UTMIP_HSRX_CFG1);
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val = readl(base + UTMIP_DEBOUNCE_CFG0);
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val &= ~UTMIP_BIAS_DEBOUNCE_A(~0);
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val |= UTMIP_BIAS_DEBOUNCE_A(phy->freq->debounce);
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writel(val, base + UTMIP_DEBOUNCE_CFG0);
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val = readl(base + UTMIP_MISC_CFG0);
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val &= ~UTMIP_SUSPEND_EXIT_ON_EDGE;
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writel(val, base + UTMIP_MISC_CFG0);
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if (!phy->soc_config->utmi_pll_config_in_car_module) {
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val = readl(base + UTMIP_MISC_CFG1);
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val &= ~(UTMIP_PLL_ACTIVE_DLY_COUNT(~0) |
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UTMIP_PLLU_STABLE_COUNT(~0));
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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 == USB_DR_MODE_PERIPHERAL) {
|
|
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);
|
|
}
|
|
|
|
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_LSBIAS_SEL |
|
|
UTMIP_XCVR_SETUP(~0) | UTMIP_XCVR_SETUP_MSB(~0) |
|
|
UTMIP_XCVR_LSFSLEW(~0) | UTMIP_XCVR_LSRSLEW(~0));
|
|
|
|
if (!config->xcvr_setup_use_fuses) {
|
|
val |= UTMIP_XCVR_SETUP(config->xcvr_setup);
|
|
val |= UTMIP_XCVR_SETUP_MSB(config->xcvr_setup);
|
|
}
|
|
val |= UTMIP_XCVR_LSFSLEW(config->xcvr_lsfslew);
|
|
val |= UTMIP_XCVR_LSRSLEW(config->xcvr_lsrslew);
|
|
|
|
if (phy->soc_config->requires_extra_tuning_parameters) {
|
|
val &= ~(UTMIP_XCVR_HSSLEW(~0) | UTMIP_XCVR_HSSLEW_MSB(~0));
|
|
val |= UTMIP_XCVR_HSSLEW(config->xcvr_hsslew);
|
|
val |= UTMIP_XCVR_HSSLEW_MSB(config->xcvr_hsslew);
|
|
}
|
|
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_BIAS_CFG1);
|
|
val &= ~UTMIP_BIAS_PDTRK_COUNT(~0);
|
|
val |= UTMIP_BIAS_PDTRK_COUNT(0x5);
|
|
writel(val, base + UTMIP_BIAS_CFG1);
|
|
|
|
val = readl(base + UTMIP_SPARE_CFG0);
|
|
if (config->xcvr_setup_use_fuses)
|
|
val |= FUSE_SETUP_SEL;
|
|
else
|
|
val &= ~FUSE_SETUP_SEL;
|
|
writel(val, base + UTMIP_SPARE_CFG0);
|
|
|
|
if (!phy->is_legacy_phy) {
|
|
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->is_legacy_phy) {
|
|
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->soc_config->requires_usbmode_setup) {
|
|
val = readl(base + USB_USBMODE);
|
|
val &= ~USB_USBMODE_MASK;
|
|
if (phy->mode == USB_DR_MODE_HOST)
|
|
val |= USB_USBMODE_HOST;
|
|
else
|
|
val |= USB_USBMODE_DEVICE;
|
|
writel(val, base + USB_USBMODE);
|
|
}
|
|
|
|
if (!phy->is_legacy_phy)
|
|
set_pts(phy, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int 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 == USB_DR_MODE_PERIPHERAL) {
|
|
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);
|
|
|
|
return 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;
|
|
|
|
ret = gpio_direction_output(phy->reset_gpio, 0);
|
|
if (ret < 0) {
|
|
dev_err(phy->u_phy.dev, "gpio %d not set to 0\n",
|
|
phy->reset_gpio);
|
|
return ret;
|
|
}
|
|
msleep(5);
|
|
ret = gpio_direction_output(phy->reset_gpio, 1);
|
|
if (ret < 0) {
|
|
dev_err(phy->u_phy.dev, "gpio %d not set to 1\n",
|
|
phy->reset_gpio);
|
|
return ret;
|
|
}
|
|
|
|
clk_prepare_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 = usb_phy_io_write(phy->ulpi, 0x40, 0x08);
|
|
if (ret) {
|
|
pr_err("%s: ulpi write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
ret = usb_phy_io_write(phy->ulpi, 0x80, 0x0B);
|
|
if (ret) {
|
|
pr_err("%s: ulpi write failed\n", __func__);
|
|
return ret;
|
|
}
|
|
|
|
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 int ulpi_phy_power_off(struct tegra_usb_phy *phy)
|
|
{
|
|
clk_disable(phy->clk);
|
|
return gpio_direction_output(phy->reset_gpio, 0);
|
|
}
|
|
|
|
static void tegra_usb_phy_close(struct tegra_usb_phy *phy)
|
|
{
|
|
if (!IS_ERR(phy->vbus))
|
|
regulator_disable(phy->vbus);
|
|
|
|
clk_disable_unprepare(phy->pll_u);
|
|
}
|
|
|
|
static 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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static int ulpi_open(struct tegra_usb_phy *phy)
|
|
{
|
|
int err;
|
|
|
|
phy->clk = devm_clk_get(phy->u_phy.dev, "ulpi-link");
|
|
if (IS_ERR(phy->clk)) {
|
|
pr_err("%s: can't get ulpi clock\n", __func__);
|
|
return PTR_ERR(phy->clk);
|
|
}
|
|
|
|
err = devm_gpio_request(phy->u_phy.dev, phy->reset_gpio,
|
|
"ulpi_phy_reset_b");
|
|
if (err < 0) {
|
|
dev_err(phy->u_phy.dev, "request failed for gpio: %d\n",
|
|
phy->reset_gpio);
|
|
return err;
|
|
}
|
|
|
|
err = gpio_direction_output(phy->reset_gpio, 0);
|
|
if (err < 0) {
|
|
dev_err(phy->u_phy.dev, "gpio %d direction not set to output\n",
|
|
phy->reset_gpio);
|
|
return err;
|
|
}
|
|
|
|
phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0);
|
|
if (!phy->ulpi) {
|
|
dev_err(phy->u_phy.dev, "otg_ulpi_create returned NULL\n");
|
|
err = -ENOMEM;
|
|
return err;
|
|
}
|
|
|
|
phy->ulpi->io_priv = phy->regs + ULPI_VIEWPORT;
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_usb_phy_init(struct tegra_usb_phy *phy)
|
|
{
|
|
unsigned long parent_rate;
|
|
int i;
|
|
int err;
|
|
|
|
phy->pll_u = devm_clk_get(phy->u_phy.dev, "pll_u");
|
|
if (IS_ERR(phy->pll_u)) {
|
|
pr_err("Can't get pll_u clock\n");
|
|
return PTR_ERR(phy->pll_u);
|
|
}
|
|
|
|
err = clk_prepare_enable(phy->pll_u);
|
|
if (err)
|
|
return err;
|
|
|
|
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 fail;
|
|
}
|
|
|
|
if (!IS_ERR(phy->vbus)) {
|
|
err = regulator_enable(phy->vbus);
|
|
if (err) {
|
|
dev_err(phy->u_phy.dev,
|
|
"failed to enable usb vbus regulator: %d\n",
|
|
err);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (phy->is_ulpi_phy)
|
|
err = ulpi_open(phy);
|
|
else
|
|
err = utmip_pad_open(phy);
|
|
if (err < 0)
|
|
goto fail;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
clk_disable_unprepare(phy->pll_u);
|
|
return err;
|
|
}
|
|
|
|
void tegra_usb_phy_preresume(struct usb_phy *x)
|
|
{
|
|
struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
|
|
|
|
if (!phy->is_ulpi_phy)
|
|
utmi_phy_preresume(phy);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tegra_usb_phy_preresume);
|
|
|
|
void tegra_usb_phy_postresume(struct usb_phy *x)
|
|
{
|
|
struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
|
|
|
|
if (!phy->is_ulpi_phy)
|
|
utmi_phy_postresume(phy);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tegra_usb_phy_postresume);
|
|
|
|
void tegra_ehci_phy_restore_start(struct usb_phy *x,
|
|
enum tegra_usb_phy_port_speed port_speed)
|
|
{
|
|
struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
|
|
|
|
if (!phy->is_ulpi_phy)
|
|
utmi_phy_restore_start(phy, port_speed);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_start);
|
|
|
|
void tegra_ehci_phy_restore_end(struct usb_phy *x)
|
|
{
|
|
struct tegra_usb_phy *phy = container_of(x, struct tegra_usb_phy, u_phy);
|
|
|
|
if (!phy->is_ulpi_phy)
|
|
utmi_phy_restore_end(phy);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tegra_ehci_phy_restore_end);
|
|
|
|
static int read_utmi_param(struct platform_device *pdev, const char *param,
|
|
u8 *dest)
|
|
{
|
|
u32 value;
|
|
int err = of_property_read_u32(pdev->dev.of_node, param, &value);
|
|
*dest = (u8)value;
|
|
if (err < 0)
|
|
dev_err(&pdev->dev, "Failed to read USB UTMI parameter %s: %d\n",
|
|
param, err);
|
|
return err;
|
|
}
|
|
|
|
static int utmi_phy_probe(struct tegra_usb_phy *tegra_phy,
|
|
struct platform_device *pdev)
|
|
{
|
|
struct resource *res;
|
|
int err;
|
|
struct tegra_utmip_config *config;
|
|
|
|
tegra_phy->is_ulpi_phy = false;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "Failed to get UTMI Pad regs\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
tegra_phy->pad_regs = devm_ioremap(&pdev->dev, res->start,
|
|
resource_size(res));
|
|
if (!tegra_phy->pad_regs) {
|
|
dev_err(&pdev->dev, "Failed to remap UTMI Pad regs\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
tegra_phy->config = devm_kzalloc(&pdev->dev, sizeof(*config),
|
|
GFP_KERNEL);
|
|
if (!tegra_phy->config)
|
|
return -ENOMEM;
|
|
|
|
config = tegra_phy->config;
|
|
|
|
err = read_utmi_param(pdev, "nvidia,hssync-start-delay",
|
|
&config->hssync_start_delay);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = read_utmi_param(pdev, "nvidia,elastic-limit",
|
|
&config->elastic_limit);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = read_utmi_param(pdev, "nvidia,idle-wait-delay",
|
|
&config->idle_wait_delay);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = read_utmi_param(pdev, "nvidia,term-range-adj",
|
|
&config->term_range_adj);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = read_utmi_param(pdev, "nvidia,xcvr-lsfslew",
|
|
&config->xcvr_lsfslew);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = read_utmi_param(pdev, "nvidia,xcvr-lsrslew",
|
|
&config->xcvr_lsrslew);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (tegra_phy->soc_config->requires_extra_tuning_parameters) {
|
|
err = read_utmi_param(pdev, "nvidia,xcvr-hsslew",
|
|
&config->xcvr_hsslew);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = read_utmi_param(pdev, "nvidia,hssquelch-level",
|
|
&config->hssquelch_level);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = read_utmi_param(pdev, "nvidia,hsdiscon-level",
|
|
&config->hsdiscon_level);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
config->xcvr_setup_use_fuses = of_property_read_bool(
|
|
pdev->dev.of_node, "nvidia,xcvr-setup-use-fuses");
|
|
|
|
if (!config->xcvr_setup_use_fuses) {
|
|
err = read_utmi_param(pdev, "nvidia,xcvr-setup",
|
|
&config->xcvr_setup);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct tegra_phy_soc_config tegra20_soc_config = {
|
|
.utmi_pll_config_in_car_module = false,
|
|
.has_hostpc = false,
|
|
.requires_usbmode_setup = false,
|
|
.requires_extra_tuning_parameters = false,
|
|
};
|
|
|
|
static const struct tegra_phy_soc_config tegra30_soc_config = {
|
|
.utmi_pll_config_in_car_module = true,
|
|
.has_hostpc = true,
|
|
.requires_usbmode_setup = true,
|
|
.requires_extra_tuning_parameters = true,
|
|
};
|
|
|
|
static const struct of_device_id tegra_usb_phy_id_table[] = {
|
|
{ .compatible = "nvidia,tegra30-usb-phy", .data = &tegra30_soc_config },
|
|
{ .compatible = "nvidia,tegra20-usb-phy", .data = &tegra20_soc_config },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, tegra_usb_phy_id_table);
|
|
|
|
static int tegra_usb_phy_probe(struct platform_device *pdev)
|
|
{
|
|
const struct of_device_id *match;
|
|
struct resource *res;
|
|
struct tegra_usb_phy *tegra_phy = NULL;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
enum usb_phy_interface phy_type;
|
|
int err;
|
|
|
|
tegra_phy = devm_kzalloc(&pdev->dev, sizeof(*tegra_phy), GFP_KERNEL);
|
|
if (!tegra_phy)
|
|
return -ENOMEM;
|
|
|
|
match = of_match_device(tegra_usb_phy_id_table, &pdev->dev);
|
|
if (!match) {
|
|
dev_err(&pdev->dev, "Error: No device match found\n");
|
|
return -ENODEV;
|
|
}
|
|
tegra_phy->soc_config = match->data;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "Failed to get I/O memory\n");
|
|
return -ENXIO;
|
|
}
|
|
|
|
tegra_phy->regs = devm_ioremap(&pdev->dev, res->start,
|
|
resource_size(res));
|
|
if (!tegra_phy->regs) {
|
|
dev_err(&pdev->dev, "Failed to remap I/O memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
tegra_phy->is_legacy_phy =
|
|
of_property_read_bool(np, "nvidia,has-legacy-mode");
|
|
|
|
phy_type = of_usb_get_phy_mode(np);
|
|
switch (phy_type) {
|
|
case USBPHY_INTERFACE_MODE_UTMI:
|
|
err = utmi_phy_probe(tegra_phy, pdev);
|
|
if (err < 0)
|
|
return err;
|
|
break;
|
|
|
|
case USBPHY_INTERFACE_MODE_ULPI:
|
|
tegra_phy->is_ulpi_phy = true;
|
|
|
|
tegra_phy->reset_gpio =
|
|
of_get_named_gpio(np, "nvidia,phy-reset-gpio", 0);
|
|
if (!gpio_is_valid(tegra_phy->reset_gpio)) {
|
|
dev_err(&pdev->dev, "invalid gpio: %d\n",
|
|
tegra_phy->reset_gpio);
|
|
return tegra_phy->reset_gpio;
|
|
}
|
|
tegra_phy->config = NULL;
|
|
break;
|
|
|
|
default:
|
|
dev_err(&pdev->dev, "phy_type is invalid or unsupported\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (of_find_property(np, "dr_mode", NULL))
|
|
tegra_phy->mode = usb_get_dr_mode(&pdev->dev);
|
|
else
|
|
tegra_phy->mode = USB_DR_MODE_HOST;
|
|
|
|
if (tegra_phy->mode == USB_DR_MODE_UNKNOWN) {
|
|
dev_err(&pdev->dev, "dr_mode is invalid\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* On some boards, the VBUS regulator doesn't need to be controlled */
|
|
if (of_find_property(np, "vbus-supply", NULL)) {
|
|
tegra_phy->vbus = devm_regulator_get(&pdev->dev, "vbus");
|
|
if (IS_ERR(tegra_phy->vbus))
|
|
return PTR_ERR(tegra_phy->vbus);
|
|
} else {
|
|
dev_notice(&pdev->dev, "no vbus regulator");
|
|
tegra_phy->vbus = ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
tegra_phy->u_phy.dev = &pdev->dev;
|
|
err = tegra_usb_phy_init(tegra_phy);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
tegra_phy->u_phy.set_suspend = tegra_usb_phy_suspend;
|
|
|
|
platform_set_drvdata(pdev, tegra_phy);
|
|
|
|
err = usb_add_phy_dev(&tegra_phy->u_phy);
|
|
if (err < 0) {
|
|
tegra_usb_phy_close(tegra_phy);
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tegra_usb_phy_remove(struct platform_device *pdev)
|
|
{
|
|
struct tegra_usb_phy *tegra_phy = platform_get_drvdata(pdev);
|
|
|
|
usb_remove_phy(&tegra_phy->u_phy);
|
|
tegra_usb_phy_close(tegra_phy);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver tegra_usb_phy_driver = {
|
|
.probe = tegra_usb_phy_probe,
|
|
.remove = tegra_usb_phy_remove,
|
|
.driver = {
|
|
.name = "tegra-phy",
|
|
.of_match_table = tegra_usb_phy_id_table,
|
|
},
|
|
};
|
|
module_platform_driver(tegra_usb_phy_driver);
|
|
|
|
MODULE_DESCRIPTION("Tegra USB PHY driver");
|
|
MODULE_LICENSE("GPL v2");
|