u-boot/arch/arm/cpu/tegra-common/pinmux-common.c

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/*
* Copyright (c) 2010-2013, NVIDIA CORPORATION. All rights reserved.
* Copyright (c) 2011 The Chromium OS Authors.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/pinmux.h>
/* return 1 if a pingrp is in range */
#define pmux_pingrp_isvalid(pin) (((pin) >= 0) && ((pin) < PMUX_PINGRP_COUNT))
/* return 1 if a pmux_func is in range */
#define pmux_func_isvalid(func) \
(((func) >= 0) && ((func) < PMUX_FUNC_COUNT))
/* return 1 if a pin_pupd_is in range */
#define pmux_pin_pupd_isvalid(pupd) \
(((pupd) >= PMUX_PULL_NORMAL) && ((pupd) <= PMUX_PULL_UP))
/* return 1 if a pin_tristate_is in range */
#define pmux_pin_tristate_isvalid(tristate) \
(((tristate) >= PMUX_TRI_NORMAL) && ((tristate) <= PMUX_TRI_TRISTATE))
#ifdef TEGRA_PMX_HAS_PIN_IO_BIT_ETC
/* return 1 if a pin_io_is in range */
#define pmux_pin_io_isvalid(io) \
(((io) >= PMUX_PIN_OUTPUT) && ((io) <= PMUX_PIN_INPUT))
/* return 1 if a pin_lock is in range */
#define pmux_pin_lock_isvalid(lock) \
(((lock) >= PMUX_PIN_LOCK_DISABLE) && ((lock) <= PMUX_PIN_LOCK_ENABLE))
/* return 1 if a pin_od is in range */
#define pmux_pin_od_isvalid(od) \
(((od) >= PMUX_PIN_OD_DISABLE) && ((od) <= PMUX_PIN_OD_ENABLE))
/* return 1 if a pin_ioreset_is in range */
#define pmux_pin_ioreset_isvalid(ioreset) \
(((ioreset) >= PMUX_PIN_IO_RESET_DISABLE) && \
((ioreset) <= PMUX_PIN_IO_RESET_ENABLE))
#ifdef TEGRA_PMX_HAS_RCV_SEL
/* return 1 if a pin_rcv_sel_is in range */
#define pmux_pin_rcv_sel_isvalid(rcv_sel) \
(((rcv_sel) >= PMUX_PIN_RCV_SEL_NORMAL) && \
((rcv_sel) <= PMUX_PIN_RCV_SEL_HIGH))
#endif /* TEGRA_PMX_HAS_RCV_SEL */
#endif /* TEGRA_PMX_HAS_PIN_IO_BIT_ETC */
#define _R(offset) (u32 *)(NV_PA_APB_MISC_BASE + (offset))
#if defined(CONFIG_TEGRA20)
#define MUX_REG(grp) _R(0x80 + ((tegra_soc_pingroups[grp].ctl_id / 16) * 4))
#define MUX_SHIFT(grp) ((tegra_soc_pingroups[grp].ctl_id % 16) * 2)
#define PULL_REG(grp) _R(0xa0 + ((tegra_soc_pingroups[grp].pull_id / 16) * 4))
#define PULL_SHIFT(grp) ((tegra_soc_pingroups[grp].pull_id % 16) * 2)
#define TRI_REG(grp) _R(0x14 + (((grp) / 32) * 4))
#define TRI_SHIFT(grp) ((grp) % 32)
#else
#define REG(pin) _R(0x3000 + ((pin) * 4))
#define MUX_REG(pin) REG(pin)
#define MUX_SHIFT(pin) 0
#define PULL_REG(pin) REG(pin)
#define PULL_SHIFT(pin) 2
#define TRI_REG(pin) REG(pin)
#define TRI_SHIFT(pin) 4
#endif /* CONFIG_TEGRA20 */
#define DRV_REG(group) _R(0x868 + ((group) * 4))
#define IO_SHIFT 5
#define OD_SHIFT 6
#define LOCK_SHIFT 7
#define IO_RESET_SHIFT 8
#define RCV_SEL_SHIFT 9
#if !defined(CONFIG_TEGRA20) && !defined(CONFIG_TEGRA30)
/* This register/field only exists on Tegra114 and later */
#define APB_MISC_PP_PINMUX_GLOBAL_0 0x40
#define CLAMP_INPUTS_WHEN_TRISTATED 1
void pinmux_set_tristate_input_clamping(void)
{
u32 *reg = _R(APB_MISC_PP_PINMUX_GLOBAL_0);
u32 val;
val = readl(reg);
val |= CLAMP_INPUTS_WHEN_TRISTATED;
writel(val, reg);
}
#endif
void pinmux_set_func(enum pmux_pingrp pin, enum pmux_func func)
{
u32 *reg = MUX_REG(pin);
int i, mux = -1;
u32 val;
if (func == PMUX_FUNC_DEFAULT)
return;
/* Error check on pin and func */
assert(pmux_pingrp_isvalid(pin));
assert(pmux_func_isvalid(func));
if (func >= PMUX_FUNC_RSVD1) {
mux = (func - PMUX_FUNC_RSVD1) & 3;
} else {
/* Search for the appropriate function */
for (i = 0; i < 4; i++) {
if (tegra_soc_pingroups[pin].funcs[i] == func) {
mux = i;
break;
}
}
}
assert(mux != -1);
val = readl(reg);
val &= ~(3 << MUX_SHIFT(pin));
val |= (mux << MUX_SHIFT(pin));
writel(val, reg);
}
void pinmux_set_pullupdown(enum pmux_pingrp pin, enum pmux_pull pupd)
{
u32 *reg = PULL_REG(pin);
u32 val;
/* Error check on pin and pupd */
assert(pmux_pingrp_isvalid(pin));
assert(pmux_pin_pupd_isvalid(pupd));
val = readl(reg);
val &= ~(3 << PULL_SHIFT(pin));
val |= (pupd << PULL_SHIFT(pin));
writel(val, reg);
}
static void pinmux_set_tristate(enum pmux_pingrp pin, int tri)
{
u32 *reg = TRI_REG(pin);
u32 val;
/* Error check on pin */
assert(pmux_pingrp_isvalid(pin));
assert(pmux_pin_tristate_isvalid(tri));
val = readl(reg);
if (tri == PMUX_TRI_TRISTATE)
val |= (1 << TRI_SHIFT(pin));
else
val &= ~(1 << TRI_SHIFT(pin));
writel(val, reg);
}
void pinmux_tristate_enable(enum pmux_pingrp pin)
{
pinmux_set_tristate(pin, PMUX_TRI_TRISTATE);
}
void pinmux_tristate_disable(enum pmux_pingrp pin)
{
pinmux_set_tristate(pin, PMUX_TRI_NORMAL);
}
#ifdef TEGRA_PMX_HAS_PIN_IO_BIT_ETC
void pinmux_set_io(enum pmux_pingrp pin, enum pmux_pin_io io)
{
u32 *reg = REG(pin);
u32 val;
if (io == PMUX_PIN_NONE)
return;
/* Error check on pin and io */
assert(pmux_pingrp_isvalid(pin));
assert(pmux_pin_io_isvalid(io));
val = readl(reg);
if (io == PMUX_PIN_INPUT)
val |= (io & 1) << IO_SHIFT;
else
val &= ~(1 << IO_SHIFT);
writel(val, reg);
}
static void pinmux_set_lock(enum pmux_pingrp pin, enum pmux_pin_lock lock)
{
u32 *reg = REG(pin);
u32 val;
if (lock == PMUX_PIN_LOCK_DEFAULT)
return;
/* Error check on pin and lock */
assert(pmux_pingrp_isvalid(pin));
assert(pmux_pin_lock_isvalid(lock));
val = readl(reg);
if (lock == PMUX_PIN_LOCK_ENABLE) {
val |= (1 << LOCK_SHIFT);
} else {
if (val & (1 << LOCK_SHIFT))
printf("%s: Cannot clear LOCK bit!\n", __func__);
val &= ~(1 << LOCK_SHIFT);
}
writel(val, reg);
return;
}
static void pinmux_set_od(enum pmux_pingrp pin, enum pmux_pin_od od)
{
u32 *reg = REG(pin);
u32 val;
if (od == PMUX_PIN_OD_DEFAULT)
return;
/* Error check on pin and od */
assert(pmux_pingrp_isvalid(pin));
assert(pmux_pin_od_isvalid(od));
val = readl(reg);
if (od == PMUX_PIN_OD_ENABLE)
val |= (1 << OD_SHIFT);
else
val &= ~(1 << OD_SHIFT);
writel(val, reg);
return;
}
static void pinmux_set_ioreset(enum pmux_pingrp pin,
enum pmux_pin_ioreset ioreset)
{
u32 *reg = REG(pin);
u32 val;
if (ioreset == PMUX_PIN_IO_RESET_DEFAULT)
return;
/* Error check on pin and ioreset */
assert(pmux_pingrp_isvalid(pin));
assert(pmux_pin_ioreset_isvalid(ioreset));
val = readl(reg);
if (ioreset == PMUX_PIN_IO_RESET_ENABLE)
val |= (1 << IO_RESET_SHIFT);
else
val &= ~(1 << IO_RESET_SHIFT);
writel(val, reg);
return;
}
#ifdef TEGRA_PMX_HAS_RCV_SEL
static void pinmux_set_rcv_sel(enum pmux_pingrp pin,
enum pmux_pin_rcv_sel rcv_sel)
{
u32 *reg = REG(pin);
u32 val;
if (rcv_sel == PMUX_PIN_RCV_SEL_DEFAULT)
return;
/* Error check on pin and rcv_sel */
assert(pmux_pingrp_isvalid(pin));
assert(pmux_pin_rcv_sel_isvalid(rcv_sel));
val = readl(reg);
if (rcv_sel == PMUX_PIN_RCV_SEL_HIGH)
val |= (1 << RCV_SEL_SHIFT);
else
val &= ~(1 << RCV_SEL_SHIFT);
writel(val, reg);
return;
}
#endif /* TEGRA_PMX_HAS_RCV_SEL */
#endif /* TEGRA_PMX_HAS_PIN_IO_BIT_ETC */
static void pinmux_config_pingrp(const struct pmux_pingrp_config *config)
{
enum pmux_pingrp pin = config->pingrp;
pinmux_set_func(pin, config->func);
pinmux_set_pullupdown(pin, config->pull);
pinmux_set_tristate(pin, config->tristate);
#ifdef TEGRA_PMX_HAS_PIN_IO_BIT_ETC
pinmux_set_io(pin, config->io);
pinmux_set_lock(pin, config->lock);
pinmux_set_od(pin, config->od);
pinmux_set_ioreset(pin, config->ioreset);
#ifdef TEGRA_PMX_HAS_RCV_SEL
pinmux_set_rcv_sel(pin, config->rcv_sel);
#endif
#endif
}
void pinmux_config_pingrp_table(const struct pmux_pingrp_config *config,
int len)
{
int i;
for (i = 0; i < len; i++)
pinmux_config_pingrp(&config[i]);
}
#ifdef TEGRA_PMX_HAS_DRVGRPS
#define pmux_drvgrp_isvalid(pd) (((pd) >= 0) && ((pd) < PMUX_DRVGRP_COUNT))
#define pmux_slw_isvalid(slw) \
(((slw) >= PMUX_SLWF_MIN) && ((slw) <= PMUX_SLWF_MAX))
#define pmux_drv_isvalid(drv) \
(((drv) >= PMUX_DRVUP_MIN) && ((drv) <= PMUX_DRVUP_MAX))
#define pmux_lpmd_isvalid(lpm) \
(((lpm) >= PMUX_LPMD_X8) && ((lpm) <= PMUX_LPMD_X))
#define pmux_schmt_isvalid(schmt) \
(((schmt) >= PMUX_SCHMT_DISABLE) && ((schmt) <= PMUX_SCHMT_ENABLE))
#define pmux_hsm_isvalid(hsm) \
(((hsm) >= PMUX_HSM_DISABLE) && ((hsm) <= PMUX_HSM_ENABLE))
#define HSM_SHIFT 2
#define SCHMT_SHIFT 3
#define LPMD_SHIFT 4
#define LPMD_MASK (3 << LPMD_SHIFT)
#define DRVDN_SHIFT 12
#define DRVDN_MASK (0x7F << DRVDN_SHIFT)
#define DRVUP_SHIFT 20
#define DRVUP_MASK (0x7F << DRVUP_SHIFT)
#define SLWR_SHIFT 28
#define SLWR_MASK (3 << SLWR_SHIFT)
#define SLWF_SHIFT 30
#define SLWF_MASK (3 << SLWF_SHIFT)
static void pinmux_set_drvup_slwf(enum pmux_drvgrp grp, int slwf)
{
u32 *reg = DRV_REG(grp);
u32 val;
/* NONE means unspecified/do not change/use POR value */
if (slwf == PMUX_SLWF_NONE)
return;
/* Error check on pad and slwf */
assert(pmux_drvgrp_isvalid(grp));
assert(pmux_slw_isvalid(slwf));
val = readl(reg);
val &= ~SLWF_MASK;
val |= (slwf << SLWF_SHIFT);
writel(val, reg);
return;
}
static void pinmux_set_drvdn_slwr(enum pmux_drvgrp grp, int slwr)
{
u32 *reg = DRV_REG(grp);
u32 val;
/* NONE means unspecified/do not change/use POR value */
if (slwr == PMUX_SLWR_NONE)
return;
/* Error check on pad and slwr */
assert(pmux_drvgrp_isvalid(grp));
assert(pmux_slw_isvalid(slwr));
val = readl(reg);
val &= ~SLWR_MASK;
val |= (slwr << SLWR_SHIFT);
writel(val, reg);
return;
}
static void pinmux_set_drvup(enum pmux_drvgrp grp, int drvup)
{
u32 *reg = DRV_REG(grp);
u32 val;
/* NONE means unspecified/do not change/use POR value */
if (drvup == PMUX_DRVUP_NONE)
return;
/* Error check on pad and drvup */
assert(pmux_drvgrp_isvalid(grp));
assert(pmux_drv_isvalid(drvup));
val = readl(reg);
val &= ~DRVUP_MASK;
val |= (drvup << DRVUP_SHIFT);
writel(val, reg);
return;
}
static void pinmux_set_drvdn(enum pmux_drvgrp grp, int drvdn)
{
u32 *reg = DRV_REG(grp);
u32 val;
/* NONE means unspecified/do not change/use POR value */
if (drvdn == PMUX_DRVDN_NONE)
return;
/* Error check on pad and drvdn */
assert(pmux_drvgrp_isvalid(grp));
assert(pmux_drv_isvalid(drvdn));
val = readl(reg);
val &= ~DRVDN_MASK;
val |= (drvdn << DRVDN_SHIFT);
writel(val, reg);
return;
}
static void pinmux_set_lpmd(enum pmux_drvgrp grp, enum pmux_lpmd lpmd)
{
u32 *reg = DRV_REG(grp);
u32 val;
/* NONE means unspecified/do not change/use POR value */
if (lpmd == PMUX_LPMD_NONE)
return;
/* Error check pad and lpmd value */
assert(pmux_drvgrp_isvalid(grp));
assert(pmux_lpmd_isvalid(lpmd));
val = readl(reg);
val &= ~LPMD_MASK;
val |= (lpmd << LPMD_SHIFT);
writel(val, reg);
return;
}
static void pinmux_set_schmt(enum pmux_drvgrp grp, enum pmux_schmt schmt)
{
u32 *reg = DRV_REG(grp);
u32 val;
/* NONE means unspecified/do not change/use POR value */
if (schmt == PMUX_SCHMT_NONE)
return;
/* Error check pad */
assert(pmux_drvgrp_isvalid(grp));
assert(pmux_schmt_isvalid(schmt));
val = readl(reg);
if (schmt == PMUX_SCHMT_ENABLE)
val |= (1 << SCHMT_SHIFT);
else
val &= ~(1 << SCHMT_SHIFT);
writel(val, reg);
return;
}
static void pinmux_set_hsm(enum pmux_drvgrp grp, enum pmux_hsm hsm)
{
u32 *reg = DRV_REG(grp);
u32 val;
/* NONE means unspecified/do not change/use POR value */
if (hsm == PMUX_HSM_NONE)
return;
/* Error check pad */
assert(pmux_drvgrp_isvalid(grp));
assert(pmux_hsm_isvalid(hsm));
val = readl(reg);
if (hsm == PMUX_HSM_ENABLE)
val |= (1 << HSM_SHIFT);
else
val &= ~(1 << HSM_SHIFT);
writel(val, reg);
return;
}
static void pinmux_config_drvgrp(const struct pmux_drvgrp_config *config)
{
enum pmux_drvgrp grp = config->drvgrp;
pinmux_set_drvup_slwf(grp, config->slwf);
pinmux_set_drvdn_slwr(grp, config->slwr);
pinmux_set_drvup(grp, config->drvup);
pinmux_set_drvdn(grp, config->drvdn);
pinmux_set_lpmd(grp, config->lpmd);
pinmux_set_schmt(grp, config->schmt);
pinmux_set_hsm(grp, config->hsm);
}
void pinmux_config_drvgrp_table(const struct pmux_drvgrp_config *config,
int len)
{
int i;
for (i = 0; i < len; i++)
pinmux_config_drvgrp(&config[i]);
}
#endif /* TEGRA_PMX_HAS_DRVGRPS */