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u-boot-brain/arch/arm/mach-tegra/tegra20/funcmux.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2011 The Chromium OS Authors.
*/
/* Tegra20 high-level function multiplexing */
#include <common.h>
#include <asm/arch/clock.h>
#include <asm/arch/funcmux.h>
#include <asm/arch/pinmux.h>
/*
* The PINMUX macro is used to set up pinmux tables.
*/
#define PINMUX(grp, mux, pupd, tri) \
{PMUX_PINGRP_##grp, PMUX_FUNC_##mux, PMUX_PULL_##pupd, PMUX_TRI_##tri}
static const struct pmux_pingrp_config disp1_default[] = {
PINMUX(LDI, DISPA, NORMAL, NORMAL),
PINMUX(LHP0, DISPA, NORMAL, NORMAL),
PINMUX(LHP1, DISPA, NORMAL, NORMAL),
PINMUX(LHP2, DISPA, NORMAL, NORMAL),
PINMUX(LHS, DISPA, NORMAL, NORMAL),
PINMUX(LM0, RSVD4, NORMAL, NORMAL),
PINMUX(LPP, DISPA, NORMAL, NORMAL),
PINMUX(LPW0, DISPA, NORMAL, NORMAL),
PINMUX(LPW2, DISPA, NORMAL, NORMAL),
PINMUX(LSC0, DISPA, NORMAL, NORMAL),
PINMUX(LSPI, DISPA, NORMAL, NORMAL),
PINMUX(LVP1, DISPA, NORMAL, NORMAL),
PINMUX(LVS, DISPA, NORMAL, NORMAL),
PINMUX(SLXD, SPDIF, NORMAL, NORMAL),
};
int funcmux_select(enum periph_id id, int config)
{
int bad_config = config != FUNCMUX_DEFAULT;
switch (id) {
case PERIPH_ID_UART1:
switch (config) {
case FUNCMUX_UART1_IRRX_IRTX:
pinmux_set_func(PMUX_PINGRP_IRRX, PMUX_FUNC_UARTA);
pinmux_set_func(PMUX_PINGRP_IRTX, PMUX_FUNC_UARTA);
pinmux_tristate_disable(PMUX_PINGRP_IRRX);
pinmux_tristate_disable(PMUX_PINGRP_IRTX);
break;
case FUNCMUX_UART1_UAA_UAB:
pinmux_set_func(PMUX_PINGRP_UAA, PMUX_FUNC_UARTA);
pinmux_set_func(PMUX_PINGRP_UAB, PMUX_FUNC_UARTA);
pinmux_tristate_disable(PMUX_PINGRP_UAA);
pinmux_tristate_disable(PMUX_PINGRP_UAB);
bad_config = 0;
break;
case FUNCMUX_UART1_GPU:
pinmux_set_func(PMUX_PINGRP_GPU, PMUX_FUNC_UARTA);
pinmux_tristate_disable(PMUX_PINGRP_GPU);
bad_config = 0;
break;
case FUNCMUX_UART1_SDIO1:
pinmux_set_func(PMUX_PINGRP_SDIO1, PMUX_FUNC_UARTA);
pinmux_tristate_disable(PMUX_PINGRP_SDIO1);
bad_config = 0;
break;
}
if (!bad_config) {
/*
* Tegra appears to boot with function UARTA pre-
* selected on mux group SDB. If two mux groups are
* both set to the same function, it's unclear which
* group's pins drive the RX signals into the HW.
* For UARTA, SDB certainly overrides group IRTX in
* practice. To solve this, configure some alternative
* function on SDB to avoid the conflict. Also, tri-
* state the group to avoid driving any signal onto it
* until we know what's connected.
*/
pinmux_tristate_enable(PMUX_PINGRP_SDB);
pinmux_set_func(PMUX_PINGRP_SDB, PMUX_FUNC_SDIO3);
}
break;
case PERIPH_ID_UART2:
if (config == FUNCMUX_UART2_UAD) {
pinmux_set_func(PMUX_PINGRP_UAD, PMUX_FUNC_UARTB);
pinmux_tristate_disable(PMUX_PINGRP_UAD);
}
break;
case PERIPH_ID_UART4:
if (config == FUNCMUX_UART4_GMC) {
pinmux_set_func(PMUX_PINGRP_GMC, PMUX_FUNC_UARTD);
pinmux_tristate_disable(PMUX_PINGRP_GMC);
}
break;
case PERIPH_ID_DVC_I2C:
/* there is only one selection, pinmux_config is ignored */
if (config == FUNCMUX_DVC_I2CP) {
pinmux_set_func(PMUX_PINGRP_I2CP, PMUX_FUNC_I2C);
pinmux_tristate_disable(PMUX_PINGRP_I2CP);
}
break;
case PERIPH_ID_I2C1:
/* support pinmux_config of 0 for now, */
if (config == FUNCMUX_I2C1_RM) {
pinmux_set_func(PMUX_PINGRP_RM, PMUX_FUNC_I2C);
pinmux_tristate_disable(PMUX_PINGRP_RM);
}
break;
case PERIPH_ID_I2C2: /* I2C2 */
switch (config) {
case FUNCMUX_I2C2_DDC: /* DDC pin group, select I2C2 */
pinmux_set_func(PMUX_PINGRP_DDC, PMUX_FUNC_I2C2);
/* PTA to HDMI */
pinmux_set_func(PMUX_PINGRP_PTA, PMUX_FUNC_HDMI);
pinmux_tristate_disable(PMUX_PINGRP_DDC);
break;
case FUNCMUX_I2C2_PTA: /* PTA pin group, select I2C2 */
pinmux_set_func(PMUX_PINGRP_PTA, PMUX_FUNC_I2C2);
/* set DDC_SEL to RSVDx (RSVD2 works for now) */
pinmux_set_func(PMUX_PINGRP_DDC, PMUX_FUNC_RSVD2);
pinmux_tristate_disable(PMUX_PINGRP_PTA);
bad_config = 0;
break;
}
break;
case PERIPH_ID_I2C3: /* I2C3 */
/* support pinmux_config of 0 for now */
if (config == FUNCMUX_I2C3_DTF) {
pinmux_set_func(PMUX_PINGRP_DTF, PMUX_FUNC_I2C3);
pinmux_tristate_disable(PMUX_PINGRP_DTF);
}
break;
case PERIPH_ID_SDMMC1:
if (config == FUNCMUX_SDMMC1_SDIO1_4BIT) {
pinmux_set_func(PMUX_PINGRP_SDIO1, PMUX_FUNC_SDIO1);
pinmux_tristate_disable(PMUX_PINGRP_SDIO1);
}
break;
case PERIPH_ID_SDMMC2:
if (config == FUNCMUX_SDMMC2_DTA_DTD_8BIT) {
pinmux_set_func(PMUX_PINGRP_DTA, PMUX_FUNC_SDIO2);
pinmux_set_func(PMUX_PINGRP_DTD, PMUX_FUNC_SDIO2);
pinmux_tristate_disable(PMUX_PINGRP_DTA);
pinmux_tristate_disable(PMUX_PINGRP_DTD);
}
break;
case PERIPH_ID_SDMMC3:
switch (config) {
case FUNCMUX_SDMMC3_SDB_SLXA_8BIT:
pinmux_set_func(PMUX_PINGRP_SLXA, PMUX_FUNC_SDIO3);
pinmux_set_func(PMUX_PINGRP_SLXC, PMUX_FUNC_SDIO3);
pinmux_set_func(PMUX_PINGRP_SLXD, PMUX_FUNC_SDIO3);
pinmux_set_func(PMUX_PINGRP_SLXK, PMUX_FUNC_SDIO3);
pinmux_tristate_disable(PMUX_PINGRP_SLXA);
pinmux_tristate_disable(PMUX_PINGRP_SLXC);
pinmux_tristate_disable(PMUX_PINGRP_SLXD);
pinmux_tristate_disable(PMUX_PINGRP_SLXK);
/* fall through */
case FUNCMUX_SDMMC3_SDB_4BIT:
pinmux_set_func(PMUX_PINGRP_SDB, PMUX_FUNC_SDIO3);
pinmux_set_func(PMUX_PINGRP_SDC, PMUX_FUNC_SDIO3);
pinmux_set_func(PMUX_PINGRP_SDD, PMUX_FUNC_SDIO3);
pinmux_tristate_disable(PMUX_PINGRP_SDB);
pinmux_tristate_disable(PMUX_PINGRP_SDC);
pinmux_tristate_disable(PMUX_PINGRP_SDD);
bad_config = 0;
break;
}
break;
case PERIPH_ID_SDMMC4:
switch (config) {
case FUNCMUX_SDMMC4_ATC_ATD_8BIT:
pinmux_set_func(PMUX_PINGRP_ATC, PMUX_FUNC_SDIO4);
pinmux_set_func(PMUX_PINGRP_ATD, PMUX_FUNC_SDIO4);
pinmux_tristate_disable(PMUX_PINGRP_ATC);
pinmux_tristate_disable(PMUX_PINGRP_ATD);
break;
case FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT:
pinmux_set_func(PMUX_PINGRP_GME, PMUX_FUNC_SDIO4);
pinmux_tristate_disable(PMUX_PINGRP_GME);
/* fall through */
case FUNCMUX_SDMMC4_ATB_GMA_4_BIT:
pinmux_set_func(PMUX_PINGRP_ATB, PMUX_FUNC_SDIO4);
pinmux_set_func(PMUX_PINGRP_GMA, PMUX_FUNC_SDIO4);
pinmux_tristate_disable(PMUX_PINGRP_ATB);
pinmux_tristate_disable(PMUX_PINGRP_GMA);
bad_config = 0;
break;
}
break;
case PERIPH_ID_KBC:
if (config == FUNCMUX_DEFAULT) {
enum pmux_pingrp grp[] = {PMUX_PINGRP_KBCA,
PMUX_PINGRP_KBCB, PMUX_PINGRP_KBCC,
PMUX_PINGRP_KBCD, PMUX_PINGRP_KBCE,
PMUX_PINGRP_KBCF};
int i;
for (i = 0; i < ARRAY_SIZE(grp); i++) {
pinmux_tristate_disable(grp[i]);
pinmux_set_func(grp[i], PMUX_FUNC_KBC);
pinmux_set_pullupdown(grp[i], PMUX_PULL_UP);
}
}
break;
case PERIPH_ID_USB2:
if (config == FUNCMUX_USB2_ULPI) {
pinmux_set_func(PMUX_PINGRP_UAA, PMUX_FUNC_ULPI);
pinmux_set_func(PMUX_PINGRP_UAB, PMUX_FUNC_ULPI);
pinmux_set_func(PMUX_PINGRP_UDA, PMUX_FUNC_ULPI);
pinmux_tristate_disable(PMUX_PINGRP_UAA);
pinmux_tristate_disable(PMUX_PINGRP_UAB);
pinmux_tristate_disable(PMUX_PINGRP_UDA);
}
break;
case PERIPH_ID_SPI1:
if (config == FUNCMUX_SPI1_GMC_GMD) {
pinmux_set_func(PMUX_PINGRP_GMC, PMUX_FUNC_SFLASH);
pinmux_set_func(PMUX_PINGRP_GMD, PMUX_FUNC_SFLASH);
pinmux_tristate_disable(PMUX_PINGRP_GMC);
pinmux_tristate_disable(PMUX_PINGRP_GMD);
}
break;
case PERIPH_ID_NDFLASH:
switch (config) {
case FUNCMUX_NDFLASH_ATC:
pinmux_set_func(PMUX_PINGRP_ATC, PMUX_FUNC_NAND);
pinmux_tristate_disable(PMUX_PINGRP_ATC);
break;
case FUNCMUX_NDFLASH_KBC_8_BIT:
pinmux_set_func(PMUX_PINGRP_KBCA, PMUX_FUNC_NAND);
pinmux_set_func(PMUX_PINGRP_KBCB, PMUX_FUNC_NAND);
pinmux_set_func(PMUX_PINGRP_KBCC, PMUX_FUNC_NAND);
pinmux_set_func(PMUX_PINGRP_KBCD, PMUX_FUNC_NAND);
pinmux_set_func(PMUX_PINGRP_KBCE, PMUX_FUNC_NAND);
pinmux_set_func(PMUX_PINGRP_KBCF, PMUX_FUNC_NAND);
pinmux_tristate_disable(PMUX_PINGRP_KBCA);
pinmux_tristate_disable(PMUX_PINGRP_KBCB);
pinmux_tristate_disable(PMUX_PINGRP_KBCC);
pinmux_tristate_disable(PMUX_PINGRP_KBCD);
pinmux_tristate_disable(PMUX_PINGRP_KBCE);
pinmux_tristate_disable(PMUX_PINGRP_KBCF);
bad_config = 0;
break;
}
break;
case PERIPH_ID_DISP1:
if (config == FUNCMUX_DEFAULT) {
int i;
for (i = PMUX_PINGRP_LD0; i <= PMUX_PINGRP_LD17; i++) {
pinmux_set_func(i, PMUX_FUNC_DISPA);
pinmux_tristate_disable(i);
pinmux_set_pullupdown(i, PMUX_PULL_NORMAL);
}
pinmux_config_pingrp_table(disp1_default,
ARRAY_SIZE(disp1_default));
}
break;
default:
debug("%s: invalid periph_id %d", __func__, id);
return -1;
}
if (bad_config) {
debug("%s: invalid config %d for periph_id %d", __func__,
config, id);
return -1;
}
return 0;
}
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