--- /dev/null
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/* 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_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_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;
+}
Code Review / kvmfornfv.git / blobdiff