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upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/drivers/usb/host/ehci-tegra.c

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/*
* Copyright (c) 2011 The Chromium OS Authors.
* Copyright (c) 2009-2013 NVIDIA Corporation
* Copyright (c) 2013 Lucas Stach
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/errno.h>
#include <asm/io.h>
#include <asm-generic/gpio.h>
#include <asm/arch/clock.h>
#include <asm/arch-tegra/usb.h>
#include <asm/arch-tegra/clk_rst.h>
#include <usb.h>
#include <usb/ulpi.h>
#include <libfdt.h>
#include <fdtdec.h>
#include "ehci.h"
#define USB1_ADDR_MASK 0xFFFF0000
#define HOSTPC1_DEVLC 0x84
#define HOSTPC1_PSPD(x) (((x) >> 25) & 0x3)
#ifdef CONFIG_USB_ULPI
#ifndef CONFIG_USB_ULPI_VIEWPORT
#error "To use CONFIG_USB_ULPI on Tegra Boards you have to also \
define CONFIG_USB_ULPI_VIEWPORT"
#endif
#endif
enum {
USB_PORTS_MAX = 3, /* Maximum ports we allow */
};
/* Parameters we need for USB */
enum {
PARAM_DIVN, /* PLL FEEDBACK DIVIDer */
PARAM_DIVM, /* PLL INPUT DIVIDER */
PARAM_DIVP, /* POST DIVIDER (2^N) */
PARAM_CPCON, /* BASE PLLC CHARGE Pump setup ctrl */
PARAM_LFCON, /* BASE PLLC LOOP FILter setup ctrl */
PARAM_ENABLE_DELAY_COUNT, /* PLL-U Enable Delay Count */
PARAM_STABLE_COUNT, /* PLL-U STABLE count */
PARAM_ACTIVE_DELAY_COUNT, /* PLL-U Active delay count */
PARAM_XTAL_FREQ_COUNT, /* PLL-U XTAL frequency count */
PARAM_DEBOUNCE_A_TIME, /* 10MS DELAY for BIAS_DEBOUNCE_A */
PARAM_BIAS_TIME, /* 20US DELAY AFter bias cell op */
PARAM_COUNT
};
/* Possible port types (dual role mode) */
enum dr_mode {
DR_MODE_NONE = 0,
DR_MODE_HOST, /* supports host operation */
DR_MODE_DEVICE, /* supports device operation */
DR_MODE_OTG, /* supports both */
};
/* Information about a USB port */
struct fdt_usb {
struct usb_ctlr *reg; /* address of registers in physical memory */
unsigned utmi:1; /* 1 if port has external tranceiver, else 0 */
unsigned ulpi:1; /* 1 if port has external ULPI transceiver */
unsigned enabled:1; /* 1 to enable, 0 to disable */
unsigned has_legacy_mode:1; /* 1 if this port has legacy mode */
unsigned initialized:1; /* has this port already been initialized? */
enum usb_init_type init_type;
enum dr_mode dr_mode; /* dual role mode */
enum periph_id periph_id;/* peripheral id */
struct gpio_desc vbus_gpio; /* GPIO for vbus enable */
struct gpio_desc phy_reset_gpio; /* GPIO to reset ULPI phy */
};
static struct fdt_usb port[USB_PORTS_MAX]; /* List of valid USB ports */
static unsigned port_count; /* Number of available ports */
/* Port that needs to clear CSC after Port Reset */
static u32 port_addr_clear_csc;
/*
* This table has USB timing parameters for each Oscillator frequency we
* support. There are four sets of values:
*
* 1. PLLU configuration information (reference clock is osc/clk_m and
* PLLU-FOs are fixed at 12MHz/60MHz/480MHz).
*
* Reference frequency 13.0MHz 19.2MHz 12.0MHz 26.0MHz
* ----------------------------------------------------------------------
* DIVN 960 (0x3c0) 200 (0c8) 960 (3c0h) 960 (3c0)
* DIVM 13 (0d) 4 (04) 12 (0c) 26 (1a)
* Filter frequency (MHz) 1 4.8 6 2
* CPCON 1100b 0011b 1100b 1100b
* LFCON0 0 0 0 0
*
* 2. PLL CONFIGURATION & PARAMETERS for different clock generators:
*
* Reference frequency 13.0MHz 19.2MHz 12.0MHz 26.0MHz
* ---------------------------------------------------------------------------
* PLLU_ENABLE_DLY_COUNT 02 (0x02) 03 (03) 02 (02) 04 (04)
* PLLU_STABLE_COUNT 51 (33) 75 (4B) 47 (2F) 102 (66)
* PLL_ACTIVE_DLY_COUNT 05 (05) 06 (06) 04 (04) 09 (09)
* XTAL_FREQ_COUNT 127 (7F) 187 (BB) 118 (76) 254 (FE)
*
* 3. Debounce values IdDig, Avalid, Bvalid, VbusValid, VbusWakeUp, and
* SessEnd. Each of these signals have their own debouncer and for each of
* those one out of two debouncing times can be chosen (BIAS_DEBOUNCE_A or
* BIAS_DEBOUNCE_B).
*
* The values of DEBOUNCE_A and DEBOUNCE_B are calculated as follows:
* 0xffff -> No debouncing at all
* <n> ms = <n> *1000 / (1/19.2MHz) / 4
*
* So to program a 1 ms debounce for BIAS_DEBOUNCE_A, we have:
* BIAS_DEBOUNCE_A[15:0] = 1000 * 19.2 / 4 = 4800 = 0x12c0
*
* We need to use only DebounceA for BOOTROM. We don't need the DebounceB
* values, so we can keep those to default.
*
* 4. The 20 microsecond delay after bias cell operation.
*/
static const unsigned T20_usb_pll[CLOCK_OSC_FREQ_COUNT][PARAM_COUNT] = {
/* DivN, DivM, DivP, CPCON, LFCON, Delays Debounce, Bias */
{ 0x3C0, 0x0D, 0x00, 0xC, 0, 0x02, 0x33, 0x05, 0x7F, 0x7EF4, 5 },
{ 0x0C8, 0x04, 0x00, 0x3, 0, 0x03, 0x4B, 0x06, 0xBB, 0xBB80, 7 },
{ 0x3C0, 0x0C, 0x00, 0xC, 0, 0x02, 0x2F, 0x04, 0x76, 0x7530, 5 },
{ 0x3C0, 0x1A, 0x00, 0xC, 0, 0x04, 0x66, 0x09, 0xFE, 0xFDE8, 9 }
};
static const unsigned T30_usb_pll[CLOCK_OSC_FREQ_COUNT][PARAM_COUNT] = {
/* DivN, DivM, DivP, CPCON, LFCON, Delays Debounce, Bias */
{ 0x3C0, 0x0D, 0x00, 0xC, 1, 0x02, 0x33, 0x09, 0x7F, 0x7EF4, 5 },
{ 0x0C8, 0x04, 0x00, 0x3, 0, 0x03, 0x4B, 0x0C, 0xBB, 0xBB80, 7 },
{ 0x3C0, 0x0C, 0x00, 0xC, 1, 0x02, 0x2F, 0x08, 0x76, 0x7530, 5 },
{ 0x3C0, 0x1A, 0x00, 0xC, 1, 0x04, 0x66, 0x09, 0xFE, 0xFDE8, 9 }
};
static const unsigned T114_usb_pll[CLOCK_OSC_FREQ_COUNT][PARAM_COUNT] = {
/* DivN, DivM, DivP, CPCON, LFCON, Delays Debounce, Bias */
{ 0x3C0, 0x0D, 0x00, 0xC, 2, 0x02, 0x33, 0x09, 0x7F, 0x7EF4, 6 },
{ 0x0C8, 0x04, 0x00, 0x3, 2, 0x03, 0x4B, 0x0C, 0xBB, 0xBB80, 8 },
{ 0x3C0, 0x0C, 0x00, 0xC, 2, 0x02, 0x2F, 0x08, 0x76, 0x7530, 5 },
{ 0x3C0, 0x1A, 0x00, 0xC, 2, 0x04, 0x66, 0x09, 0xFE, 0xFDE8, 0xB }
};
/* UTMIP Idle Wait Delay */
static const u8 utmip_idle_wait_delay = 17;
/* UTMIP Elastic limit */
static const u8 utmip_elastic_limit = 16;
/* UTMIP High Speed Sync Start Delay */
static const u8 utmip_hs_sync_start_delay = 9;
struct fdt_usb_controller {
int compat;
/* flag to determine whether controller supports hostpc register */
u32 has_hostpc:1;
const unsigned *pll_parameter;
};
static struct fdt_usb_controller fdt_usb_controllers[] = {
{
.compat = COMPAT_NVIDIA_TEGRA20_USB,
.has_hostpc = 0,
.pll_parameter = (const unsigned *)T20_usb_pll,
},
{
.compat = COMPAT_NVIDIA_TEGRA30_USB,
.has_hostpc = 1,
.pll_parameter = (const unsigned *)T30_usb_pll,
},
{
.compat = COMPAT_NVIDIA_TEGRA114_USB,
.has_hostpc = 1,
.pll_parameter = (const unsigned *)T114_usb_pll,
},
};
static struct fdt_usb_controller *controller;
/*
* A known hardware issue where Connect Status Change bit of PORTSC register
* of USB1 controller will be set after Port Reset.
* We have to clear it in order for later device enumeration to proceed.
* This ehci_powerup_fixup overrides the weak function ehci_powerup_fixup
* in "ehci-hcd.c".
*/
void ehci_powerup_fixup(uint32_t *status_reg, uint32_t *reg)
{
mdelay(50);
/* This is to avoid PORT_ENABLE bit to be cleared in "ehci-hcd.c". */
if (controller->has_hostpc)
*reg |= EHCI_PS_PE;
if (((u32)status_reg & TEGRA_USB_ADDR_MASK) != port_addr_clear_csc)
return;
/* For EHCI_PS_CSC to be cleared in ehci_hcd.c */
if (ehci_readl(status_reg) & EHCI_PS_CSC)
*reg |= EHCI_PS_CSC;
}
/*
* This ehci_set_usbmode overrides the weak function ehci_set_usbmode
* in "ehci-hcd.c".
*/
void ehci_set_usbmode(int index)
{
struct fdt_usb *config;
struct usb_ctlr *usbctlr;
uint32_t tmp;
config = &port[index];
usbctlr = config->reg;
tmp = ehci_readl(&usbctlr->usb_mode);
tmp |= USBMODE_CM_HC;
ehci_writel(&usbctlr->usb_mode, tmp);
}
/*
* This ehci_get_port_speed overrides the weak function ehci_get_port_speed
* in "ehci-hcd.c".
*/
int ehci_get_port_speed(struct ehci_hcor *hcor, uint32_t reg)
{
uint32_t tmp;
uint32_t *reg_ptr;
if (controller->has_hostpc) {
reg_ptr = (uint32_t *)((u8 *)&hcor->or_usbcmd + HOSTPC1_DEVLC);
tmp = ehci_readl(reg_ptr);
return HOSTPC1_PSPD(tmp);
} else
return PORTSC_PSPD(reg);
}
/* Set up VBUS for host/device mode */
static void set_up_vbus(struct fdt_usb *config, enum usb_init_type init)
{
/*
* If we are an OTG port initializing in host mode,
* check if remote host is driving VBus and bail out in this case.
*/
if (init == USB_INIT_HOST &&
config->dr_mode == DR_MODE_OTG &&
(readl(&config->reg->phy_vbus_sensors) & VBUS_VLD_STS)) {
printf("tegrausb: VBUS input active; not enabling as host\n");
return;
}
if (dm_gpio_is_valid(&config->vbus_gpio)) {
int vbus_value;
vbus_value = (init == USB_INIT_HOST);
dm_gpio_set_value(&config->vbus_gpio, vbus_value);
debug("set_up_vbus: GPIO %d %d\n",
gpio_get_number(&config->vbus_gpio), vbus_value);
}
}
void usbf_reset_controller(struct fdt_usb *config, struct usb_ctlr *usbctlr)
{
/* Reset the USB controller with 2us delay */
reset_periph(config->periph_id, 2);
/*
* Set USB1_NO_LEGACY_MODE to 1, Registers are accessible under
* base address
*/
if (config->has_legacy_mode)
setbits_le32(&usbctlr->usb1_legacy_ctrl, USB1_NO_LEGACY_MODE);
/* Put UTMIP1/3 in reset */
setbits_le32(&usbctlr->susp_ctrl, UTMIP_RESET);
/* Enable the UTMIP PHY */
if (config->utmi)
setbits_le32(&usbctlr->susp_ctrl, UTMIP_PHY_ENB);
}
static const unsigned *get_pll_timing(void)
{
const unsigned *timing;
timing = controller->pll_parameter +
clock_get_osc_freq() * PARAM_COUNT;
return timing;
}
/* select the PHY to use with a USB controller */
static void init_phy_mux(struct fdt_usb *config, uint pts,
enum usb_init_type init)
{
struct usb_ctlr *usbctlr = config->reg;
#if defined(CONFIG_TEGRA20)
if (config->periph_id == PERIPH_ID_USBD) {
clrsetbits_le32(&usbctlr->port_sc1, PTS1_MASK,
pts << PTS1_SHIFT);
clrbits_le32(&usbctlr->port_sc1, STS1);
} else {
clrsetbits_le32(&usbctlr->port_sc1, PTS_MASK,
pts << PTS_SHIFT);
clrbits_le32(&usbctlr->port_sc1, STS);
}
#else
/* Set to Host mode (if applicable) after Controller Reset was done */
clrsetbits_le32(&usbctlr->usb_mode, USBMODE_CM_HC,
(init == USB_INIT_HOST) ? USBMODE_CM_HC : 0);
/*
* Select PHY interface after setting host mode.
* For device mode, the ordering requirement is not an issue, since
* only the first USB controller supports device mode, and that USB
* controller can only talk to a UTMI PHY, so the PHY selection is
* already made at reset time, so this write is a no-op.
*/
clrsetbits_le32(&usbctlr->hostpc1_devlc, PTS_MASK,
pts << PTS_SHIFT);
clrbits_le32(&usbctlr->hostpc1_devlc, STS);
#endif
}
/* set up the UTMI USB controller with the parameters provided */
static int init_utmi_usb_controller(struct fdt_usb *config,
enum usb_init_type init)
{
u32 b_sess_valid_mask, val;
int loop_count;
const unsigned *timing;
struct usb_ctlr *usbctlr = config->reg;
struct clk_rst_ctlr *clkrst;
struct usb_ctlr *usb1ctlr;
clock_enable(config->periph_id);
/* Reset the usb controller */
usbf_reset_controller(config, usbctlr);
/* Stop crystal clock by setting UTMIP_PHY_XTAL_CLOCKEN low */
clrbits_le32(&usbctlr->utmip_misc_cfg1, UTMIP_PHY_XTAL_CLOCKEN);
/* Follow the crystal clock disable by >100ns delay */
udelay(1);
b_sess_valid_mask = (VBUS_B_SESS_VLD_SW_VALUE | VBUS_B_SESS_VLD_SW_EN);
clrsetbits_le32(&usbctlr->phy_vbus_sensors, b_sess_valid_mask,
(init == USB_INIT_DEVICE) ? b_sess_valid_mask : 0);
/*
* To Use the A Session Valid for cable detection logic, VBUS_WAKEUP
* mux must be switched to actually use a_sess_vld threshold.
*/
if (config->dr_mode == DR_MODE_OTG &&
dm_gpio_is_valid(&config->vbus_gpio))
clrsetbits_le32(&usbctlr->usb1_legacy_ctrl,
VBUS_SENSE_CTL_MASK,
VBUS_SENSE_CTL_A_SESS_VLD << VBUS_SENSE_CTL_SHIFT);
/*
* PLL Delay CONFIGURATION settings. The following parameters control
* the bring up of the plls.
*/
timing = get_pll_timing();
if (!controller->has_hostpc) {
val = readl(&usbctlr->utmip_misc_cfg1);
clrsetbits_le32(&val, UTMIP_PLLU_STABLE_COUNT_MASK,
timing[PARAM_STABLE_COUNT] <<
UTMIP_PLLU_STABLE_COUNT_SHIFT);
clrsetbits_le32(&val, UTMIP_PLL_ACTIVE_DLY_COUNT_MASK,
timing[PARAM_ACTIVE_DELAY_COUNT] <<
UTMIP_PLL_ACTIVE_DLY_COUNT_SHIFT);
writel(val, &usbctlr->utmip_misc_cfg1);
/* Set PLL enable delay count and crystal frequency count */
val = readl(&usbctlr->utmip_pll_cfg1);
clrsetbits_le32(&val, UTMIP_PLLU_ENABLE_DLY_COUNT_MASK,
timing[PARAM_ENABLE_DELAY_COUNT] <<
UTMIP_PLLU_ENABLE_DLY_COUNT_SHIFT);
clrsetbits_le32(&val, UTMIP_XTAL_FREQ_COUNT_MASK,
timing[PARAM_XTAL_FREQ_COUNT] <<
UTMIP_XTAL_FREQ_COUNT_SHIFT);
writel(val, &usbctlr->utmip_pll_cfg1);
} else {
clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
val = readl(&clkrst->crc_utmip_pll_cfg2);
clrsetbits_le32(&val, UTMIP_PLLU_STABLE_COUNT_MASK,
timing[PARAM_STABLE_COUNT] <<
UTMIP_PLLU_STABLE_COUNT_SHIFT);
clrsetbits_le32(&val, UTMIP_PLL_ACTIVE_DLY_COUNT_MASK,
timing[PARAM_ACTIVE_DELAY_COUNT] <<
UTMIP_PLL_ACTIVE_DLY_COUNT_SHIFT);
writel(val, &clkrst->crc_utmip_pll_cfg2);
/* Set PLL enable delay count and crystal frequency count */
val = readl(&clkrst->crc_utmip_pll_cfg1);
clrsetbits_le32(&val, UTMIP_PLLU_ENABLE_DLY_COUNT_MASK,
timing[PARAM_ENABLE_DELAY_COUNT] <<
UTMIP_PLLU_ENABLE_DLY_COUNT_SHIFT);
clrsetbits_le32(&val, UTMIP_XTAL_FREQ_COUNT_MASK,
timing[PARAM_XTAL_FREQ_COUNT] <<
UTMIP_XTAL_FREQ_COUNT_SHIFT);
writel(val, &clkrst->crc_utmip_pll_cfg1);
/* Disable Power Down state for PLL */
clrbits_le32(&clkrst->crc_utmip_pll_cfg1,
PLLU_POWERDOWN | PLL_ENABLE_POWERDOWN |
PLL_ACTIVE_POWERDOWN);
/* Recommended PHY settings for EYE diagram */
val = readl(&usbctlr->utmip_xcvr_cfg0);
clrsetbits_le32(&val, UTMIP_XCVR_SETUP_MASK,
0x4 << UTMIP_XCVR_SETUP_SHIFT);
clrsetbits_le32(&val, UTMIP_XCVR_SETUP_MSB_MASK,
0x3 << UTMIP_XCVR_SETUP_MSB_SHIFT);
clrsetbits_le32(&val, UTMIP_XCVR_HSSLEW_MSB_MASK,
0x8 << UTMIP_XCVR_HSSLEW_MSB_SHIFT);
writel(val, &usbctlr->utmip_xcvr_cfg0);
clrsetbits_le32(&usbctlr->utmip_xcvr_cfg1,
UTMIP_XCVR_TERM_RANGE_ADJ_MASK,
0x7 << UTMIP_XCVR_TERM_RANGE_ADJ_SHIFT);
/* Some registers can be controlled from USB1 only. */
if (config->periph_id != PERIPH_ID_USBD) {
clock_enable(PERIPH_ID_USBD);
/* Disable Reset if in Reset state */
reset_set_enable(PERIPH_ID_USBD, 0);
}
usb1ctlr = (struct usb_ctlr *)
((u32)config->reg & USB1_ADDR_MASK);
val = readl(&usb1ctlr->utmip_bias_cfg0);
setbits_le32(&val, UTMIP_HSDISCON_LEVEL_MSB);
clrsetbits_le32(&val, UTMIP_HSDISCON_LEVEL_MASK,
0x1 << UTMIP_HSDISCON_LEVEL_SHIFT);
clrsetbits_le32(&val, UTMIP_HSSQUELCH_LEVEL_MASK,
0x2 << UTMIP_HSSQUELCH_LEVEL_SHIFT);
writel(val, &usb1ctlr->utmip_bias_cfg0);
/* Miscellaneous setting mentioned in Programming Guide */
clrbits_le32(&usbctlr->utmip_misc_cfg0,
UTMIP_SUSPEND_EXIT_ON_EDGE);
}
/* Setting the tracking length time */
clrsetbits_le32(&usbctlr->utmip_bias_cfg1,
UTMIP_BIAS_PDTRK_COUNT_MASK,
timing[PARAM_BIAS_TIME] << UTMIP_BIAS_PDTRK_COUNT_SHIFT);
/* Program debounce time for VBUS to become valid */
clrsetbits_le32(&usbctlr->utmip_debounce_cfg0,
UTMIP_DEBOUNCE_CFG0_MASK,
timing[PARAM_DEBOUNCE_A_TIME] << UTMIP_DEBOUNCE_CFG0_SHIFT);
setbits_le32(&usbctlr->utmip_tx_cfg0, UTMIP_FS_PREAMBLE_J);
/* Disable battery charge enabling bit */
setbits_le32(&usbctlr->utmip_bat_chrg_cfg0, UTMIP_PD_CHRG);
clrbits_le32(&usbctlr->utmip_xcvr_cfg0, UTMIP_XCVR_LSBIAS_SE);
setbits_le32(&usbctlr->utmip_spare_cfg0, FUSE_SETUP_SEL);
/*
* Configure the UTMIP_IDLE_WAIT and UTMIP_ELASTIC_LIMIT
* Setting these fields, together with default values of the
* other fields, results in programming the registers below as
* follows:
* UTMIP_HSRX_CFG0 = 0x9168c000
* UTMIP_HSRX_CFG1 = 0x13
*/
/* Set PLL enable delay count and Crystal frequency count */
val = readl(&usbctlr->utmip_hsrx_cfg0);
clrsetbits_le32(&val, UTMIP_IDLE_WAIT_MASK,
utmip_idle_wait_delay << UTMIP_IDLE_WAIT_SHIFT);
clrsetbits_le32(&val, UTMIP_ELASTIC_LIMIT_MASK,
utmip_elastic_limit << UTMIP_ELASTIC_LIMIT_SHIFT);
writel(val, &usbctlr->utmip_hsrx_cfg0);
/* Configure the UTMIP_HS_SYNC_START_DLY */
clrsetbits_le32(&usbctlr->utmip_hsrx_cfg1,
UTMIP_HS_SYNC_START_DLY_MASK,
utmip_hs_sync_start_delay << UTMIP_HS_SYNC_START_DLY_SHIFT);
/* Preceed the crystal clock disable by >100ns delay. */
udelay(1);
/* Resuscitate crystal clock by setting UTMIP_PHY_XTAL_CLOCKEN */
setbits_le32(&usbctlr->utmip_misc_cfg1, UTMIP_PHY_XTAL_CLOCKEN);
if (controller->has_hostpc) {
if (config->periph_id == PERIPH_ID_USBD)
clrbits_le32(&clkrst->crc_utmip_pll_cfg2,
UTMIP_FORCE_PD_SAMP_A_POWERDOWN);
if (config->periph_id == PERIPH_ID_USB2)
clrbits_le32(&clkrst->crc_utmip_pll_cfg2,
UTMIP_FORCE_PD_SAMP_B_POWERDOWN);
if (config->periph_id == PERIPH_ID_USB3)
clrbits_le32(&clkrst->crc_utmip_pll_cfg2,
UTMIP_FORCE_PD_SAMP_C_POWERDOWN);
}
/* Finished the per-controller init. */
/* De-assert UTMIP_RESET to bring out of reset. */
clrbits_le32(&usbctlr->susp_ctrl, UTMIP_RESET);
/* Wait for the phy clock to become valid in 100 ms */
for (loop_count = 100000; loop_count != 0; loop_count--) {
if (readl(&usbctlr->susp_ctrl) & USB_PHY_CLK_VALID)
break;
udelay(1);
}
if (!loop_count)
return -1;
/* Disable ICUSB FS/LS transceiver */
clrbits_le32(&usbctlr->icusb_ctrl, IC_ENB1);
/* Select UTMI parallel interface */
init_phy_mux(config, PTS_UTMI, init);
/* Deassert power down state */
clrbits_le32(&usbctlr->utmip_xcvr_cfg0, UTMIP_FORCE_PD_POWERDOWN |
UTMIP_FORCE_PD2_POWERDOWN | UTMIP_FORCE_PDZI_POWERDOWN);
clrbits_le32(&usbctlr->utmip_xcvr_cfg1, UTMIP_FORCE_PDDISC_POWERDOWN |
UTMIP_FORCE_PDCHRP_POWERDOWN | UTMIP_FORCE_PDDR_POWERDOWN);
if (controller->has_hostpc) {
/*
* BIAS Pad Power Down is common among all 3 USB
* controllers and can be controlled from USB1 only.
*/
usb1ctlr = (struct usb_ctlr *)
((u32)config->reg & USB1_ADDR_MASK);
clrbits_le32(&usb1ctlr->utmip_bias_cfg0, UTMIP_BIASPD);
udelay(25);
clrbits_le32(&usb1ctlr->utmip_bias_cfg1,
UTMIP_FORCE_PDTRK_POWERDOWN);
}
return 0;
}
#ifdef CONFIG_USB_ULPI
/* if board file does not set a ULPI reference frequency we default to 24MHz */
#ifndef CONFIG_ULPI_REF_CLK
#define CONFIG_ULPI_REF_CLK 24000000
#endif
/* set up the ULPI USB controller with the parameters provided */
static int init_ulpi_usb_controller(struct fdt_usb *config,
enum usb_init_type init)
{
u32 val;
int loop_count;
struct ulpi_viewport ulpi_vp;
struct usb_ctlr *usbctlr = config->reg;
/* set up ULPI reference clock on pllp_out4 */
clock_enable(PERIPH_ID_DEV2_OUT);
clock_set_pllout(CLOCK_ID_PERIPH, PLL_OUT4, CONFIG_ULPI_REF_CLK);
/* reset ULPI phy */
if (dm_gpio_is_valid(&config->phy_reset_gpio)) {
dm_gpio_set_value(&config->phy_reset_gpio, 0);
mdelay(5);
dm_gpio_set_value(&config->phy_reset_gpio, 1);
}
/* Reset the usb controller */
clock_enable(config->periph_id);
usbf_reset_controller(config, usbctlr);
/* enable pinmux bypass */
setbits_le32(&usbctlr->ulpi_timing_ctrl_0,
ULPI_CLKOUT_PINMUX_BYP | ULPI_OUTPUT_PINMUX_BYP);
/* Select ULPI parallel interface */
init_phy_mux(config, PTS_ULPI, init);
/* enable ULPI transceiver */
setbits_le32(&usbctlr->susp_ctrl, ULPI_PHY_ENB);
/* configure ULPI transceiver timings */
val = 0;
writel(val, &usbctlr->ulpi_timing_ctrl_1);
val |= ULPI_DATA_TRIMMER_SEL(4);
val |= ULPI_STPDIRNXT_TRIMMER_SEL(4);
val |= ULPI_DIR_TRIMMER_SEL(4);
writel(val, &usbctlr->ulpi_timing_ctrl_1);
udelay(10);
val |= ULPI_DATA_TRIMMER_LOAD;
val |= ULPI_STPDIRNXT_TRIMMER_LOAD;
val |= ULPI_DIR_TRIMMER_LOAD;
writel(val, &usbctlr->ulpi_timing_ctrl_1);
/* set up phy for host operation with external vbus supply */
ulpi_vp.port_num = 0;
ulpi_vp.viewport_addr = (u32)&usbctlr->ulpi_viewport;
if (ulpi_init(&ulpi_vp)) {
printf("Tegra ULPI viewport init failed\n");
return -1;
}
ulpi_set_vbus(&ulpi_vp, 1, 1);
ulpi_set_vbus_indicator(&ulpi_vp, 1, 1, 0);
/* enable wakeup events */
setbits_le32(&usbctlr->port_sc1, WKCN | WKDS | WKOC);
/* Enable and wait for the phy clock to become valid in 100 ms */
setbits_le32(&usbctlr->susp_ctrl, USB_SUSP_CLR);
for (loop_count = 100000; loop_count != 0; loop_count--) {
if (readl(&usbctlr->susp_ctrl) & USB_PHY_CLK_VALID)
break;
udelay(1);
}
if (!loop_count)
return -1;
clrbits_le32(&usbctlr->susp_ctrl, USB_SUSP_CLR);
return 0;
}
#else
static int init_ulpi_usb_controller(struct fdt_usb *config,
enum usb_init_type init)
{
printf("No code to set up ULPI controller, please enable"
"CONFIG_USB_ULPI and CONFIG_USB_ULPI_VIEWPORT");
return -1;
}
#endif
static void config_clock(const u32 timing[])
{
clock_start_pll(CLOCK_ID_USB,
timing[PARAM_DIVM], timing[PARAM_DIVN], timing[PARAM_DIVP],
timing[PARAM_CPCON], timing[PARAM_LFCON]);
}
static int fdt_decode_usb(const void *blob, int node, struct fdt_usb *config)
{
const char *phy, *mode;
config->reg = (struct usb_ctlr *)fdtdec_get_addr(blob, node, "reg");
mode = fdt_getprop(blob, node, "dr_mode", NULL);
if (mode) {
if (0 == strcmp(mode, "host"))
config->dr_mode = DR_MODE_HOST;
else if (0 == strcmp(mode, "peripheral"))
config->dr_mode = DR_MODE_DEVICE;
else if (0 == strcmp(mode, "otg"))
config->dr_mode = DR_MODE_OTG;
else {
debug("%s: Cannot decode dr_mode '%s'\n", __func__,
mode);
return -FDT_ERR_NOTFOUND;
}
} else {
config->dr_mode = DR_MODE_HOST;
}
phy = fdt_getprop(blob, node, "phy_type", NULL);
config->utmi = phy && 0 == strcmp("utmi", phy);
config->ulpi = phy && 0 == strcmp("ulpi", phy);
config->enabled = fdtdec_get_is_enabled(blob, node);
config->has_legacy_mode = fdtdec_get_bool(blob, node,
"nvidia,has-legacy-mode");
if (config->has_legacy_mode)
port_addr_clear_csc = (u32) config->reg;
config->periph_id = clock_decode_periph_id(blob, node);
if (config->periph_id == PERIPH_ID_NONE) {
debug("%s: Missing/invalid peripheral ID\n", __func__);
return -FDT_ERR_NOTFOUND;
}
gpio_request_by_name_nodev(blob, node, "nvidia,vbus-gpio", 0,
&config->vbus_gpio, GPIOD_IS_OUT);
gpio_request_by_name_nodev(blob, node, "nvidia,phy-reset-gpio", 0,
&config->phy_reset_gpio, GPIOD_IS_OUT);
debug("enabled=%d, legacy_mode=%d, utmi=%d, ulpi=%d, periph_id=%d, "
"vbus=%d, phy_reset=%d, dr_mode=%d\n",
config->enabled, config->has_legacy_mode, config->utmi,
config->ulpi, config->periph_id,
gpio_get_number(&config->vbus_gpio),
gpio_get_number(&config->phy_reset_gpio), config->dr_mode);
return 0;
}
/*
* process_usb_nodes() - Process a list of USB nodes, adding them to our list
* of USB ports.
* @blob: fdt blob
* @node_list: list of nodes to process (any <=0 are ignored)
* @count: number of nodes to process
*
* Return: 0 - ok, -1 - error
*/
static int process_usb_nodes(const void *blob, int node_list[], int count)
{
struct fdt_usb config;
int node, i;
int clk_done = 0;
port_count = 0;
for (i = 0; i < count; i++) {
if (port_count == USB_PORTS_MAX) {
printf("tegrausb: Cannot register more than %d ports\n",
USB_PORTS_MAX);
return -1;
}
debug("USB %d: ", i);
node = node_list[i];
if (!node)
continue;
if (fdt_decode_usb(blob, node, &config)) {
debug("Cannot decode USB node %s\n",
fdt_get_name(blob, node, NULL));
return -1;
}
if (!clk_done) {
config_clock(get_pll_timing());
clk_done = 1;
}
config.initialized = 0;
/* add new USB port to the list of available ports */
port[port_count++] = config;
}
return 0;
}
int usb_process_devicetree(const void *blob)
{
int node_list[USB_PORTS_MAX];
int count, err = 0;
int i;
for (i = 0; i < ARRAY_SIZE(fdt_usb_controllers); i++) {
controller = &fdt_usb_controllers[i];
count = fdtdec_find_aliases_for_id(blob, "usb",
controller->compat, node_list, USB_PORTS_MAX);
if (count) {
err = process_usb_nodes(blob, node_list, count);
if (err)
printf("%s: Error processing USB node!\n",
__func__);
return err;
}
}
if (i == ARRAY_SIZE(fdt_usb_controllers))
controller = NULL;
return err;
}
/**
* Start up the given port number (ports are numbered from 0 on each board).
* This returns values for the appropriate hccr and hcor addresses to use for
* USB EHCI operations.
*
* @param index port number to start
* @param hccr returns start address of EHCI HCCR registers
* @param hcor returns start address of EHCI HCOR registers
* @return 0 if ok, -1 on error (generally invalid port number)
*/
int ehci_hcd_init(int index, enum usb_init_type init,
struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
struct fdt_usb *config;
struct usb_ctlr *usbctlr;
if (index >= port_count)
return -1;
config = &port[index];
switch (init) {
case USB_INIT_HOST:
switch (config->dr_mode) {
case DR_MODE_HOST:
case DR_MODE_OTG:
break;
default:
printf("tegrausb: Invalid dr_mode %d for host mode\n",
config->dr_mode);
return -1;
}
break;
case USB_INIT_DEVICE:
if (config->periph_id != PERIPH_ID_USBD) {
printf("tegrausb: Device mode only supported on first USB controller\n");
return -1;
}
if (!config->utmi) {
printf("tegrausb: Device mode only supported with UTMI PHY\n");
return -1;
}
switch (config->dr_mode) {
case DR_MODE_DEVICE:
case DR_MODE_OTG:
break;
default:
printf("tegrausb: Invalid dr_mode %d for device mode\n",
config->dr_mode);
return -1;
}
break;
default:
printf("tegrausb: Unknown USB_INIT_* %d\n", init);
return -1;
}
/* skip init, if the port is already initialized */
if (config->initialized && config->init_type == init)
goto success;
if (config->utmi && init_utmi_usb_controller(config, init)) {
printf("tegrausb: Cannot init port %d\n", index);
return -1;
}
if (config->ulpi && init_ulpi_usb_controller(config, init)) {
printf("tegrausb: Cannot init port %d\n", index);
return -1;
}
set_up_vbus(config, init);
config->initialized = 1;
config->init_type = init;
success:
usbctlr = config->reg;
*hccr = (struct ehci_hccr *)&usbctlr->cap_length;
*hcor = (struct ehci_hcor *)&usbctlr->usb_cmd;
return 0;
}
/*
* Bring down the specified USB controller
*/
int ehci_hcd_stop(int index)
{
struct usb_ctlr *usbctlr;
usbctlr = port[index].reg;
/* Stop controller */
writel(0, &usbctlr->usb_cmd);
udelay(1000);
/* Initiate controller reset */
writel(2, &usbctlr->usb_cmd);
udelay(1000);
port[index].initialized = 0;
return 0;
}