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linux/arch/arm/mach-tegra/pinmux.c
Erik Gilling a4417c8451 [ARM] tegra: add pinmux support 
v2: fixes from Russell King
	- include linux/io.h instead of asm/io.h
v3:
	- Add drive strength controls
	- Replace typedef enums with plain enums

Signed-off-by: Erik Gilling <konkers@android.com>
Signed-off-by: Colin Cross <ccross@android.com>
2010-08-05 14:57:02 -07:00

946 lines
30 KiB
C
Raw Blame History

/*
* linux/arch/arm/mach-tegra/pinmux.c
*
* Copyright (C) 2010 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <mach/iomap.h>
#include <mach/pinmux.h>
#define TEGRA_TRI_STATE(x) (0x14 + (4 * (x)))
#define TEGRA_PP_MUX_CTL(x) (0x80 + (4 * (x)))
#define TEGRA_PP_PU_PD(x) (0xa0 + (4 * (x)))
#define REG_A 0
#define REG_B 1
#define REG_C 2
#define REG_D 3
#define REG_E 4
#define REG_F 5
#define REG_G 6
#define REG_N -1
#define HSM_EN(reg) (((reg) >> 2) & 0x1)
#define SCHMT_EN(reg) (((reg) >> 3) & 0x1)
#define LPMD(reg) (((reg) >> 4) & 0x3)
#define DRVDN(reg) (((reg) >> 12) & 0x1f)
#define DRVUP(reg) (((reg) >> 20) & 0x1f)
#define SLWR(reg) (((reg) >> 28) & 0x3)
#define SLWF(reg) (((reg) >> 30) & 0x3)
struct tegra_pingroup_desc {
const char *name;
int funcs[4];
s8 tri_reg; /* offset into the TRISTATE_REG_* register bank */
s8 tri_bit; /* offset into the TRISTATE_REG_* register bit */
s8 mux_reg; /* offset into the PIN_MUX_CTL_* register bank */
s8 mux_bit; /* offset into the PIN_MUX_CTL_* register bit */
s8 pupd_reg; /* offset into the PULL_UPDOWN_REG_* register bank */
s8 pupd_bit; /* offset into the PULL_UPDOWN_REG_* register bit */
};
#define PINGROUP(pg_name, f0, f1, f2, f3, \
tri_r, tri_b, mux_r, mux_b, pupd_r, pupd_b) \
[TEGRA_PINGROUP_ ## pg_name] = { \
.name = #pg_name, \
.funcs = { \
TEGRA_MUX_ ## f0, \
TEGRA_MUX_ ## f1, \
TEGRA_MUX_ ## f2, \
TEGRA_MUX_ ## f3, \
}, \
.tri_reg = REG_ ## tri_r, \
.tri_bit = tri_b, \
.mux_reg = REG_ ## mux_r, \
.mux_bit = mux_b, \
.pupd_reg = REG_ ## pupd_r, \
.pupd_bit = pupd_b, \
}
static const struct tegra_pingroup_desc pingroups[TEGRA_MAX_PINGROUP] = {
PINGROUP(ATA, IDE, NAND, GMI, RSVD, A, 0, A, 24, A, 0),
PINGROUP(ATB, IDE, NAND, GMI, SDIO4, A, 1, A, 16, A, 2),
PINGROUP(ATC, IDE, NAND, GMI, SDIO4, A, 2, A, 22, A, 4),
PINGROUP(ATD, IDE, NAND, GMI, SDIO4, A, 3, A, 20, A, 6),
PINGROUP(ATE, IDE, NAND, GMI, RSVD, B, 25, A, 12, A, 8),
PINGROUP(CDEV1, OSC, PLLA_OUT, PLLM_OUT1, AUDIO_SYNC, A, 4, C, 2, C, 0),
PINGROUP(CDEV2, OSC, AHB_CLK, APB_CLK, PLLP_OUT4, A, 5, C, 4, C, 2),
PINGROUP(CRTP, CRT, RSVD, RSVD, RSVD, D, 14, G, 20, B, 24),
PINGROUP(CSUS, PLLC_OUT1, PLLP_OUT2, PLLP_OUT3, VI_SENSOR_CLK, A, 6, C, 6, D, 24),
PINGROUP(DAP1, DAP1, RSVD, GMI, SDIO2, A, 7, C, 20, A, 10),
PINGROUP(DAP2, DAP2, TWC, RSVD, GMI, A, 8, C, 22, A, 12),
PINGROUP(DAP3, DAP3, RSVD, RSVD, RSVD, A, 9, C, 24, A, 14),
PINGROUP(DAP4, DAP4, RSVD, GMI, RSVD, A, 10, C, 26, A, 16),
PINGROUP(DDC, I2C2, RSVD, RSVD, RSVD, B, 31, C, 0, E, 28),
PINGROUP(DTA, RSVD, SDIO2, VI, RSVD, A, 11, B, 20, A, 18),
PINGROUP(DTB, RSVD, RSVD, VI, SPI1, A, 12, B, 22, A, 20),
PINGROUP(DTC, RSVD, RSVD, VI, RSVD, A, 13, B, 26, A, 22),
PINGROUP(DTD, RSVD, SDIO2, VI, RSVD, A, 14, B, 28, A, 24),
PINGROUP(DTE, RSVD, RSVD, VI, SPI1, A, 15, B, 30, A, 26),
PINGROUP(DTF, I2C3, RSVD, VI, RSVD, D, 12, G, 30, A, 28),
PINGROUP(GMA, UARTE, SPI3, GMI, SDIO4, A, 28, B, 0, E, 20),
PINGROUP(GMB, IDE, NAND, GMI, GMI_INT, B, 29, C, 28, E, 22),
PINGROUP(GMC, UARTD, SPI4, GMI, SFLASH, A, 29, B, 2, E, 24),
PINGROUP(GMD, RSVD, NAND, GMI, SFLASH, B, 30, C, 30, E, 26),
PINGROUP(GME, RSVD, DAP5, GMI, SDIO4, B, 0, D, 0, C, 24),
PINGROUP(GPU, PWM, UARTA, GMI, RSVD, A, 16, D, 4, B, 20),
PINGROUP(GPU7, RTCK, RSVD, RSVD, RSVD, D, 11, G, 28, B, 6),
PINGROUP(GPV, PCIE, RSVD, RSVD, RSVD, A, 17, D, 2, A, 30),
PINGROUP(HDINT, HDMI, RSVD, RSVD, RSVD, C, 23, B, 4, D, 22),
PINGROUP(I2CP, I2C, RSVD, RSVD, RSVD, A, 18, C, 8, B, 2),
PINGROUP(IRRX, UARTA, UARTB, GMI, SPI4, A, 20, C, 18, C, 22),
PINGROUP(IRTX, UARTA, UARTB, GMI, SPI4, A, 19, C, 16, C, 20),
PINGROUP(KBCA, KBC, NAND, SDIO2, EMC_TEST0_DLL, A, 22, C, 10, B, 8),
PINGROUP(KBCB, KBC, NAND, SDIO2, MIO, A, 21, C, 12, B, 10),
PINGROUP(KBCC, KBC, NAND, TRACE, EMC_TEST1_DLL, B, 26, C, 14, B, 12),
PINGROUP(KBCD, KBC, NAND, SDIO2, MIO, D, 10, G, 26, B, 14),
PINGROUP(KBCE, KBC, NAND, OWR, RSVD, A, 26, A, 28, E, 2),
PINGROUP(KBCF, KBC, NAND, TRACE, MIO, A, 27, A, 26, E, 0),
PINGROUP(LCSN, DISPLAYA, DISPLAYB, SPI3, RSVD, C, 31, E, 12, D, 20),
PINGROUP(LD0, DISPLAYA, DISPLAYB, XIO, RSVD, C, 0, F, 0, D, 12),
PINGROUP(LD1, DISPLAYA, DISPLAYB, XIO, RSVD, C, 1, F, 2, D, 12),
PINGROUP(LD10, DISPLAYA, DISPLAYB, XIO, RSVD, C, 10, F, 20, D, 12),
PINGROUP(LD11, DISPLAYA, DISPLAYB, XIO, RSVD, C, 11, F, 22, D, 12),
PINGROUP(LD12, DISPLAYA, DISPLAYB, XIO, RSVD, C, 12, F, 24, D, 12),
PINGROUP(LD13, DISPLAYA, DISPLAYB, XIO, RSVD, C, 13, F, 26, D, 12),
PINGROUP(LD14, DISPLAYA, DISPLAYB, XIO, RSVD, C, 14, F, 28, D, 12),
PINGROUP(LD15, DISPLAYA, DISPLAYB, XIO, RSVD, C, 15, F, 30, D, 12),
PINGROUP(LD16, DISPLAYA, DISPLAYB, XIO, RSVD, C, 16, G, 0, D, 12),
PINGROUP(LD17, DISPLAYA, DISPLAYB, RSVD, RSVD, C, 17, G, 2, D, 12),
PINGROUP(LD2, DISPLAYA, DISPLAYB, XIO, RSVD, C, 2, F, 4, D, 12),
PINGROUP(LD3, DISPLAYA, DISPLAYB, XIO, RSVD, C, 3, F, 6, D, 12),
PINGROUP(LD4, DISPLAYA, DISPLAYB, XIO, RSVD, C, 4, F, 8, D, 12),
PINGROUP(LD5, DISPLAYA, DISPLAYB, XIO, RSVD, C, 5, F, 10, D, 12),
PINGROUP(LD6, DISPLAYA, DISPLAYB, XIO, RSVD, C, 6, F, 12, D, 12),
PINGROUP(LD7, DISPLAYA, DISPLAYB, XIO, RSVD, C, 7, F, 14, D, 12),
PINGROUP(LD8, DISPLAYA, DISPLAYB, XIO, RSVD, C, 8, F, 16, D, 12),
PINGROUP(LD9, DISPLAYA, DISPLAYB, XIO, RSVD, C, 9, F, 18, D, 12),
PINGROUP(LDC, DISPLAYA, DISPLAYB, RSVD, RSVD, C, 30, E, 14, D, 20),
PINGROUP(LDI, DISPLAYA, DISPLAYB, RSVD, RSVD, D, 6, G, 16, D, 18),
PINGROUP(LHP0, DISPLAYA, DISPLAYB, RSVD, RSVD, C, 18, G, 10, D, 16),
PINGROUP(LHP1, DISPLAYA, DISPLAYB, RSVD, RSVD, C, 19, G, 4, D, 14),
PINGROUP(LHP2, DISPLAYA, DISPLAYB, RSVD, RSVD, C, 20, G, 6, D, 14),
PINGROUP(LHS, DISPLAYA, DISPLAYB, XIO, RSVD, D, 7, E, 22, D, 22),
PINGROUP(LM0, DISPLAYA, DISPLAYB, SPI3, RSVD, C, 24, E, 26, D, 22),
PINGROUP(LM1, DISPLAYA, DISPLAYB, RSVD, CRT, C, 25, E, 28, D, 22),
PINGROUP(LPP, DISPLAYA, DISPLAYB, RSVD, RSVD, D, 8, G, 14, D, 18),
PINGROUP(LPW0, DISPLAYA, DISPLAYB, SPI3, HDMI, D, 3, E, 0, D, 20),
PINGROUP(LPW1, DISPLAYA, DISPLAYB, RSVD, RSVD, D, 4, E, 2, D, 20),
PINGROUP(LPW2, DISPLAYA, DISPLAYB, SPI3, HDMI, D, 5, E, 4, D, 20),
PINGROUP(LSC0, DISPLAYA, DISPLAYB, XIO, RSVD, C, 27, E, 18, D, 22),
PINGROUP(LSC1, DISPLAYA, DISPLAYB, SPI3, HDMI, C, 28, E, 20, D, 20),
PINGROUP(LSCK, DISPLAYA, DISPLAYB, SPI3, HDMI, C, 29, E, 16, D, 20),
PINGROUP(LSDA, DISPLAYA, DISPLAYB, SPI3, HDMI, D, 1, E, 8, D, 20),
PINGROUP(LSDI, DISPLAYA, DISPLAYB, SPI3, RSVD, D, 2, E, 6, D, 20),
PINGROUP(LSPI, DISPLAYA, DISPLAYB, XIO, HDMI, D, 0, E, 10, D, 22),
PINGROUP(LVP0, DISPLAYA, DISPLAYB, RSVD, RSVD, C, 21, E, 30, D, 22),
PINGROUP(LVP1, DISPLAYA, DISPLAYB, RSVD, RSVD, C, 22, G, 8, D, 16),
PINGROUP(LVS, DISPLAYA, DISPLAYB, XIO, RSVD, C, 26, E, 24, D, 22),
PINGROUP(OWC, OWR, RSVD, RSVD, RSVD, A, 31, B, 8, E, 30),
PINGROUP(PMC, PWR_ON, PWR_INTR, RSVD, RSVD, A, 23, G, 18, N, -1),
PINGROUP(PTA, I2C2, HDMI, GMI, RSVD, A, 24, G, 22, B, 4),
PINGROUP(RM, I2C, RSVD, RSVD, RSVD, A, 25, A, 14, B, 0),
PINGROUP(SDB, UARTA, PWM, SDIO3, SPI2, D, 15, D, 10, N, -1),
PINGROUP(SDC, PWM, TWC, SDIO3, SPI3, B, 1, D, 12, D, 28),
PINGROUP(SDD, UARTA, PWM, SDIO3, SPI3, B, 2, D, 14, D, 30),
PINGROUP(SDIO1, SDIO1, RSVD, UARTE, UARTA, A, 30, A, 30, E, 18),
PINGROUP(SLXA, PCIE, SPI4, SDIO3, SPI2, B, 3, B, 6, B, 22),
PINGROUP(SLXC, SPDIF, SPI4, SDIO3, SPI2, B, 5, B, 10, B, 26),
PINGROUP(SLXD, SPDIF, SPI4, SDIO3, SPI2, B, 6, B, 12, B, 28),
PINGROUP(SLXK, PCIE, SPI4, SDIO3, SPI2, B, 7, B, 14, B, 30),
PINGROUP(SPDI, SPDIF, RSVD, I2C, SDIO2, B, 8, D, 8, B, 16),
PINGROUP(SPDO, SPDIF, RSVD, I2C, SDIO2, B, 9, D, 6, B, 18),
PINGROUP(SPIA, SPI1, SPI2, SPI3, GMI, B, 10, D, 30, C, 4),
PINGROUP(SPIB, SPI1, SPI2, SPI3, GMI, B, 11, D, 28, C, 6),
PINGROUP(SPIC, SPI1, SPI2, SPI3, GMI, B, 12, D, 26, C, 8),
PINGROUP(SPID, SPI2, SPI1, SPI2_ALT, GMI, B, 13, D, 24, C, 10),
PINGROUP(SPIE, SPI2, SPI1, SPI2_ALT, GMI, B, 14, D, 22, C, 12),
PINGROUP(SPIF, SPI3, SPI1, SPI2, RSVD, B, 15, D, 20, C, 14),
PINGROUP(SPIG, SPI3, SPI2, SPI2_ALT, I2C, B, 16, D, 18, C, 16),
PINGROUP(SPIH, SPI3, SPI2, SPI2_ALT, I2C, B, 17, D, 16, C, 18),
PINGROUP(UAA, SPI3, MIPI_HS, UARTA, ULPI, B, 18, A, 0, D, 0),
PINGROUP(UAB, SPI2, MIPI_HS, UARTA, ULPI, B, 19, A, 2, D, 2),
PINGROUP(UAC, OWR, RSVD, RSVD, RSVD, B, 20, A, 4, D, 4),
PINGROUP(UAD, IRDA, SPDIF, UARTA, SPI4, B, 21, A, 6, D, 6),
PINGROUP(UCA, UARTC, RSVD, GMI, RSVD, B, 22, B, 16, D, 8),
PINGROUP(UCB, UARTC, PWM, GMI, RSVD, B, 23, B, 18, D, 10),
PINGROUP(UDA, SPI1, RSVD, UARTD, ULPI, D, 13, A, 8, E, 16),
/* these pin groups only have pullup and pull down control */
PINGROUP(CK32, RSVD, RSVD, RSVD, RSVD, N, -1, N, -1, E, 14),
PINGROUP(DDRC, RSVD, RSVD, RSVD, RSVD, N, -1, N, -1, D, 26),
PINGROUP(PMCA, RSVD, RSVD, RSVD, RSVD, N, -1, N, -1, E, 4),
PINGROUP(PMCB, RSVD, RSVD, RSVD, RSVD, N, -1, N, -1, E, 6),
PINGROUP(PMCC, RSVD, RSVD, RSVD, RSVD, N, -1, N, -1, E, 8),
PINGROUP(PMCD, RSVD, RSVD, RSVD, RSVD, N, -1, N, -1, E, 10),
PINGROUP(PMCE, RSVD, RSVD, RSVD, RSVD, N, -1, N, -1, E, 12),
PINGROUP(XM2C, RSVD, RSVD, RSVD, RSVD, N, -1, N, -1, C, 30),
PINGROUP(XM2D, RSVD, RSVD, RSVD, RSVD, N, -1, N, -1, C, 28),
};
static char *tegra_mux_names[TEGRA_MAX_MUX] = {
[TEGRA_MUX_AHB_CLK] = "AHB_CLK",
[TEGRA_MUX_APB_CLK] = "APB_CLK",
[TEGRA_MUX_AUDIO_SYNC] = "AUDIO_SYNC",
[TEGRA_MUX_CRT] = "CRT",
[TEGRA_MUX_DAP1] = "DAP1",
[TEGRA_MUX_DAP2] = "DAP2",
[TEGRA_MUX_DAP3] = "DAP3",
[TEGRA_MUX_DAP4] = "DAP4",
[TEGRA_MUX_DAP5] = "DAP5",
[TEGRA_MUX_DISPLAYA] = "DISPLAYA",
[TEGRA_MUX_DISPLAYB] = "DISPLAYB",
[TEGRA_MUX_EMC_TEST0_DLL] = "EMC_TEST0_DLL",
[TEGRA_MUX_EMC_TEST1_DLL] = "EMC_TEST1_DLL",
[TEGRA_MUX_GMI] = "GMI",
[TEGRA_MUX_GMI_INT] = "GMI_INT",
[TEGRA_MUX_HDMI] = "HDMI",
[TEGRA_MUX_I2C] = "I2C",
[TEGRA_MUX_I2C2] = "I2C2",
[TEGRA_MUX_I2C3] = "I2C3",
[TEGRA_MUX_IDE] = "IDE",
[TEGRA_MUX_IRDA] = "IRDA",
[TEGRA_MUX_KBC] = "KBC",
[TEGRA_MUX_MIO] = "MIO",
[TEGRA_MUX_MIPI_HS] = "MIPI_HS",
[TEGRA_MUX_NAND] = "NAND",
[TEGRA_MUX_OSC] = "OSC",
[TEGRA_MUX_OWR] = "OWR",
[TEGRA_MUX_PCIE] = "PCIE",
[TEGRA_MUX_PLLA_OUT] = "PLLA_OUT",
[TEGRA_MUX_PLLC_OUT1] = "PLLC_OUT1",
[TEGRA_MUX_PLLM_OUT1] = "PLLM_OUT1",
[TEGRA_MUX_PLLP_OUT2] = "PLLP_OUT2",
[TEGRA_MUX_PLLP_OUT3] = "PLLP_OUT3",
[TEGRA_MUX_PLLP_OUT4] = "PLLP_OUT4",
[TEGRA_MUX_PWM] = "PWM",
[TEGRA_MUX_PWR_INTR] = "PWR_INTR",
[TEGRA_MUX_PWR_ON] = "PWR_ON",
[TEGRA_MUX_RTCK] = "RTCK",
[TEGRA_MUX_SDIO1] = "SDIO1",
[TEGRA_MUX_SDIO2] = "SDIO2",
[TEGRA_MUX_SDIO3] = "SDIO3",
[TEGRA_MUX_SDIO4] = "SDIO4",
[TEGRA_MUX_SFLASH] = "SFLASH",
[TEGRA_MUX_SPDIF] = "SPDIF",
[TEGRA_MUX_SPI1] = "SPI1",
[TEGRA_MUX_SPI2] = "SPI2",
[TEGRA_MUX_SPI2_ALT] = "SPI2_ALT",
[TEGRA_MUX_SPI3] = "SPI3",
[TEGRA_MUX_SPI4] = "SPI4",
[TEGRA_MUX_TRACE] = "TRACE",
[TEGRA_MUX_TWC] = "TWC",
[TEGRA_MUX_UARTA] = "UARTA",
[TEGRA_MUX_UARTB] = "UARTB",
[TEGRA_MUX_UARTC] = "UARTC",
[TEGRA_MUX_UARTD] = "UARTD",
[TEGRA_MUX_UARTE] = "UARTE",
[TEGRA_MUX_ULPI] = "ULPI",
[TEGRA_MUX_VI] = "VI",
[TEGRA_MUX_VI_SENSOR_CLK] = "VI_SENSOR_CLK",
[TEGRA_MUX_XIO] = "XIO",
};
struct tegra_drive_pingroup_desc {
const char *name;
s16 reg;
};
#define DRIVE_PINGROUP(pg_name, r) \
[TEGRA_DRIVE_PINGROUP_ ## pg_name] = { \
.name = #pg_name, \
.reg = r \
}
static const struct tegra_drive_pingroup_desc drive_pingroups[TEGRA_MAX_PINGROUP] = {
DRIVE_PINGROUP(AO1, 0x868),
DRIVE_PINGROUP(AO2, 0x86c),
DRIVE_PINGROUP(AT1, 0x870),
DRIVE_PINGROUP(AT2, 0x874),
DRIVE_PINGROUP(CDEV1, 0x878),
DRIVE_PINGROUP(CDEV2, 0x87c),
DRIVE_PINGROUP(CSUS, 0x880),
DRIVE_PINGROUP(DAP1, 0x884),
DRIVE_PINGROUP(DAP2, 0x888),
DRIVE_PINGROUP(DAP3, 0x88c),
DRIVE_PINGROUP(DAP4, 0x890),
DRIVE_PINGROUP(DBG, 0x894),
DRIVE_PINGROUP(LCD1, 0x898),
DRIVE_PINGROUP(LCD2, 0x89c),
DRIVE_PINGROUP(SDMMC2, 0x8a0),
DRIVE_PINGROUP(SDMMC3, 0x8a4),
DRIVE_PINGROUP(SPI, 0x8a8),
DRIVE_PINGROUP(UAA, 0x8ac),
DRIVE_PINGROUP(UAB, 0x8b0),
DRIVE_PINGROUP(UART2, 0x8b4),
DRIVE_PINGROUP(UART3, 0x8b8),
DRIVE_PINGROUP(VI1, 0x8bc),
DRIVE_PINGROUP(VI2, 0x8c0),
DRIVE_PINGROUP(XM2A, 0x8c4),
DRIVE_PINGROUP(XM2C, 0x8c8),
DRIVE_PINGROUP(XM2D, 0x8cc),
DRIVE_PINGROUP(XM2CLK, 0x8d0),
DRIVE_PINGROUP(MEMCOMP, 0x8d4),
};
static const char *tegra_drive_names[TEGRA_MAX_DRIVE] = {
[TEGRA_DRIVE_DIV_8] = "DIV_8",
[TEGRA_DRIVE_DIV_4] = "DIV_4",
[TEGRA_DRIVE_DIV_2] = "DIV_2",
[TEGRA_DRIVE_DIV_1] = "DIV_1",
};
static const char *tegra_slew_names[TEGRA_MAX_SLEW] = {
[TEGRA_SLEW_FASTEST] = "FASTEST",
[TEGRA_SLEW_FAST] = "FAST",
[TEGRA_SLEW_SLOW] = "SLOW",
[TEGRA_SLEW_SLOWEST] = "SLOWEST",
};
static DEFINE_SPINLOCK(mux_lock);
static const char *pingroup_name(enum tegra_pingroup pg)
{
if (pg < 0 || pg >= TEGRA_MAX_PINGROUP)
return "<UNKNOWN>";
return pingroups[pg].name;
}
static const char *func_name(enum tegra_mux_func func)
{
if (func == TEGRA_MUX_RSVD1)
return "RSVD1";
if (func == TEGRA_MUX_RSVD2)
return "RSVD2";
if (func == TEGRA_MUX_RSVD3)
return "RSVD3";
if (func == TEGRA_MUX_RSVD4)
return "RSVD4";
if (func == TEGRA_MUX_NONE)
return "NONE";
if (func < 0 || func >= TEGRA_MAX_MUX)
return "<UNKNOWN>";
return tegra_mux_names[func];
}
static const char *tri_name(unsigned long val)
{
return val ? "TRISTATE" : "NORMAL";
}
static const char *pupd_name(unsigned long val)
{
switch (val) {
case 0:
return "NORMAL";
case 1:
return "PULL_DOWN";
case 2:
return "PULL_UP";
default:
return "RSVD";
}
}
static inline unsigned long pg_readl(unsigned long offset)
{
return readl(IO_TO_VIRT(TEGRA_APB_MISC_BASE + offset));
}
static inline void pg_writel(unsigned long value, unsigned long offset)
{
writel(value, IO_TO_VIRT(TEGRA_APB_MISC_BASE + offset));
}
int tegra_pinmux_set_func(enum tegra_pingroup pg, enum tegra_mux_func func)
{
int mux = -1;
int i;
unsigned long reg;
unsigned long flags;
if (pg < 0 || pg >= TEGRA_MAX_PINGROUP)
return -ERANGE;
if (pingroups[pg].mux_reg == REG_N)
return -EINVAL;
if (func < 0)
return -ERANGE;
if (func & TEGRA_MUX_RSVD) {
mux = func & 0x3;
} else {
for (i = 0; i < 4; i++) {
if (pingroups[pg].funcs[i] == func) {
mux = i;
break;
}
}
}
if (mux < 0)
return -EINVAL;
spin_lock_irqsave(&mux_lock, flags);
reg = pg_readl(TEGRA_PP_MUX_CTL(pingroups[pg].mux_reg));
reg &= ~(0x3 << pingroups[pg].mux_bit);
reg |= mux << pingroups[pg].mux_bit;
pg_writel(reg, TEGRA_PP_MUX_CTL(pingroups[pg].mux_reg));
spin_unlock_irqrestore(&mux_lock, flags);
return 0;
}
int tegra_pinmux_set_tristate(enum tegra_pingroup pg,
enum tegra_tristate tristate)
{
unsigned long reg;
unsigned long flags;
if (pg < 0 || pg >= TEGRA_MAX_PINGROUP)
return -ERANGE;
if (pingroups[pg].tri_reg == REG_N)
return -EINVAL;
spin_lock_irqsave(&mux_lock, flags);
reg = pg_readl(TEGRA_TRI_STATE(pingroups[pg].tri_reg));
reg &= ~(0x1 << pingroups[pg].tri_bit);
if (tristate)
reg |= 1 << pingroups[pg].tri_bit;
pg_writel(reg, TEGRA_TRI_STATE(pingroups[pg].tri_reg));
spin_unlock_irqrestore(&mux_lock, flags);
return 0;
}
int tegra_pinmux_set_pullupdown(enum tegra_pingroup pg,
enum tegra_pullupdown pupd)
{
unsigned long reg;
unsigned long flags;
if (pg < 0 || pg >= TEGRA_MAX_PINGROUP)
return -ERANGE;
if (pingroups[pg].pupd_reg == REG_N)
return -EINVAL;
if (pupd != TEGRA_PUPD_NORMAL &&
pupd != TEGRA_PUPD_PULL_DOWN &&
pupd != TEGRA_PUPD_PULL_UP)
return -EINVAL;
spin_lock_irqsave(&mux_lock, flags);
reg = pg_readl(TEGRA_PP_PU_PD(pingroups[pg].pupd_reg));
reg &= ~(0x3 << pingroups[pg].pupd_bit);
reg |= pupd << pingroups[pg].pupd_bit;
pg_writel(reg, TEGRA_PP_PU_PD(pingroups[pg].pupd_reg));
spin_unlock_irqrestore(&mux_lock, flags);
return 0;
}
void tegra_pinmux_config_pingroup(enum tegra_pingroup pingroup,
enum tegra_mux_func func,
enum tegra_pullupdown pupd,
enum tegra_tristate tristate)
{
int err;
if (pingroups[pingroup].mux_reg != REG_N) {
err = tegra_pinmux_set_func(pingroup, func);
if (err < 0)
pr_err("pinmux: can't set pingroup %s func to %s: %d\n",
pingroup_name(pingroup), func_name(func), err);
}
if (pingroups[pingroup].pupd_reg != REG_N) {
err = tegra_pinmux_set_pullupdown(pingroup, pupd);
if (err < 0)
pr_err("pinmux: can't set pingroup %s pullupdown to %s: %d\n",
pingroup_name(pingroup), pupd_name(pupd), err);
}
if (pingroups[pingroup].tri_reg != REG_N) {
err = tegra_pinmux_set_tristate(pingroup, tristate);
if (err < 0)
pr_err("pinmux: can't set pingroup %s tristate to %s: %d\n",
pingroup_name(pingroup), tri_name(func), err);
}
}
void tegra_pinmux_config_table(struct tegra_pingroup_config *config, int len)
{
int i;
for (i = 0; i < len; i++)
tegra_pinmux_config_pingroup(config[i].pingroup,
config[i].func,
config[i].pupd,
config[i].tristate);
}
static const char *drive_pinmux_name(enum tegra_drive_pingroup pg)
{
if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP)
return "<UNKNOWN>";
return drive_pingroups[pg].name;
}
static const char *enable_name(unsigned long val)
{
return val ? "ENABLE" : "DISABLE";
}
static const char *drive_name(unsigned long val)
{
if (val >= TEGRA_MAX_DRIVE)
return "<UNKNOWN>";
return tegra_drive_names[val];
}
static const char *slew_name(unsigned long val)
{
if (val >= TEGRA_MAX_SLEW)
return "<UNKNOWN>";
return tegra_slew_names[val];
}
static int tegra_drive_pinmux_set_hsm(enum tegra_drive_pingroup pg,
enum tegra_hsm hsm)
{
unsigned long flags;
u32 reg;
if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP)
return -ERANGE;
if (hsm != TEGRA_HSM_ENABLE && hsm != TEGRA_HSM_DISABLE)
return -EINVAL;
spin_lock_irqsave(&mux_lock, flags);
reg = pg_readl(drive_pingroups[pg].reg);
if (hsm == TEGRA_HSM_ENABLE)
reg |= (1 << 2);
else
reg &= ~(1 << 2);
pg_writel(reg, drive_pingroups[pg].reg);
spin_unlock_irqrestore(&mux_lock, flags);
return 0;
}
static int tegra_drive_pinmux_set_schmitt(enum tegra_drive_pingroup pg,
enum tegra_schmitt schmitt)
{
unsigned long flags;
u32 reg;
if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP)
return -ERANGE;
if (schmitt != TEGRA_SCHMITT_ENABLE && schmitt != TEGRA_SCHMITT_DISABLE)
return -EINVAL;
spin_lock_irqsave(&mux_lock, flags);
reg = pg_readl(drive_pingroups[pg].reg);
if (schmitt == TEGRA_SCHMITT_ENABLE)
reg |= (1 << 3);
else
reg &= ~(1 << 3);
pg_writel(reg, drive_pingroups[pg].reg);
spin_unlock_irqrestore(&mux_lock, flags);
return 0;
}
static int tegra_drive_pinmux_set_drive(enum tegra_drive_pingroup pg,
enum tegra_drive drive)
{
unsigned long flags;
u32 reg;
if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP)
return -ERANGE;
if (drive < 0 || drive >= TEGRA_MAX_DRIVE)
return -EINVAL;
spin_lock_irqsave(&mux_lock, flags);
reg = pg_readl(drive_pingroups[pg].reg);
reg &= ~(0x3 << 4);
reg |= drive << 4;
pg_writel(reg, drive_pingroups[pg].reg);
spin_unlock_irqrestore(&mux_lock, flags);
return 0;
}
static int tegra_drive_pinmux_set_pull_down(enum tegra_drive_pingroup pg,
enum tegra_pull_strength pull_down)
{
unsigned long flags;
u32 reg;
if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP)
return -ERANGE;
if (pull_down < 0 || pull_down >= TEGRA_MAX_PULL)
return -EINVAL;
spin_lock_irqsave(&mux_lock, flags);
reg = pg_readl(drive_pingroups[pg].reg);
reg &= ~(0x1f << 12);
reg |= pull_down << 12;
pg_writel(reg, drive_pingroups[pg].reg);
spin_unlock_irqrestore(&mux_lock, flags);
return 0;
}
static int tegra_drive_pinmux_set_pull_up(enum tegra_drive_pingroup pg,
enum tegra_pull_strength pull_up)
{
unsigned long flags;
u32 reg;
if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP)
return -ERANGE;
if (pull_up < 0 || pull_up >= TEGRA_MAX_PULL)
return -EINVAL;
spin_lock_irqsave(&mux_lock, flags);
reg = pg_readl(drive_pingroups[pg].reg);
reg &= ~(0x1f << 12);
reg |= pull_up << 12;
pg_writel(reg, drive_pingroups[pg].reg);
spin_unlock_irqrestore(&mux_lock, flags);
return 0;
}
static int tegra_drive_pinmux_set_slew_rising(enum tegra_drive_pingroup pg,
enum tegra_slew slew_rising)
{
unsigned long flags;
u32 reg;
if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP)
return -ERANGE;
if (slew_rising < 0 || slew_rising >= TEGRA_MAX_SLEW)
return -EINVAL;
spin_lock_irqsave(&mux_lock, flags);
reg = pg_readl(drive_pingroups[pg].reg);
reg &= ~(0x3 << 28);
reg |= slew_rising << 28;
pg_writel(reg, drive_pingroups[pg].reg);
spin_unlock_irqrestore(&mux_lock, flags);
return 0;
}
static int tegra_drive_pinmux_set_slew_falling(enum tegra_drive_pingroup pg,
enum tegra_slew slew_falling)
{
unsigned long flags;
u32 reg;
if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP)
return -ERANGE;
if (slew_falling < 0 || slew_falling >= TEGRA_MAX_SLEW)
return -EINVAL;
spin_lock_irqsave(&mux_lock, flags);
reg = pg_readl(drive_pingroups[pg].reg);
reg &= ~(0x3 << 30);
reg |= slew_falling << 30;
pg_writel(reg, drive_pingroups[pg].reg);
spin_unlock_irqrestore(&mux_lock, flags);
return 0;
}
static void tegra_drive_pinmux_config_pingroup(enum tegra_drive_pingroup pingroup,
enum tegra_hsm hsm,
enum tegra_schmitt schmitt,
enum tegra_drive drive,
enum tegra_pull_strength pull_down,
enum tegra_pull_strength pull_up,
enum tegra_slew slew_rising,
enum tegra_slew slew_falling)
{
int err;
err = tegra_drive_pinmux_set_hsm(pingroup, hsm);
if (err < 0)
pr_err("pinmux: can't set pingroup %s hsm to %s: %d\n",
drive_pinmux_name(pingroup),
enable_name(hsm), err);
err = tegra_drive_pinmux_set_schmitt(pingroup, schmitt);
if (err < 0)
pr_err("pinmux: can't set pingroup %s schmitt to %s: %d\n",
drive_pinmux_name(pingroup),
enable_name(schmitt), err);
err = tegra_drive_pinmux_set_drive(pingroup, drive);
if (err < 0)
pr_err("pinmux: can't set pingroup %s drive to %s: %d\n",
drive_pinmux_name(pingroup),
drive_name(drive), err);
err = tegra_drive_pinmux_set_pull_down(pingroup, pull_down);
if (err < 0)
pr_err("pinmux: can't set pingroup %s pull down to %d: %d\n",
drive_pinmux_name(pingroup),
pull_down, err);
err = tegra_drive_pinmux_set_pull_up(pingroup, pull_up);
if (err < 0)
pr_err("pinmux: can't set pingroup %s pull up to %d: %d\n",
drive_pinmux_name(pingroup),
pull_up, err);
err = tegra_drive_pinmux_set_slew_rising(pingroup, slew_rising);
if (err < 0)
pr_err("pinmux: can't set pingroup %s rising slew to %s: %d\n",
drive_pinmux_name(pingroup),
slew_name(slew_rising), err);
err = tegra_drive_pinmux_set_slew_falling(pingroup, slew_falling);
if (err < 0)
pr_err("pinmux: can't set pingroup %s falling slew to %s: %d\n",
drive_pinmux_name(pingroup),
slew_name(slew_falling), err);
}
void tegra_drive_pinmux_config_table(struct tegra_drive_pingroup_config *config,
int len)
{
int i;
for (i = 0; i < len; i++)
tegra_drive_pinmux_config_pingroup(config[i].pingroup,
config[i].hsm,
config[i].schmitt,
config[i].drive,
config[i].pull_down,
config[i].pull_up,
config[i].slew_rising,
config[i].slew_falling);
}
#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
#include <linux/seq_file.h>
static void dbg_pad_field(struct seq_file *s, int len)
{
seq_putc(s, ',');
while (len-- > -1)
seq_putc(s, ' ');
}
static int dbg_pinmux_show(struct seq_file *s, void *unused)
{
int i;
int len;
for (i = 0; i < TEGRA_MAX_PINGROUP; i++) {
unsigned long tri;
unsigned long mux;
unsigned long pupd;
seq_printf(s, "\t{TEGRA_PINGROUP_%s", pingroups[i].name);
len = strlen(pingroups[i].name);
dbg_pad_field(s, 5 - len);
if (pingroups[i].mux_reg == REG_N) {
seq_printf(s, "TEGRA_MUX_NONE");
len = strlen("NONE");
} else {
mux = (pg_readl(TEGRA_PP_MUX_CTL(pingroups[i].mux_reg)) >>
pingroups[i].mux_bit) & 0x3;
if (pingroups[i].funcs[mux] == TEGRA_MUX_RSVD) {
seq_printf(s, "TEGRA_MUX_RSVD%1lu", mux+1);
len = 5;
} else {
seq_printf(s, "TEGRA_MUX_%s",
tegra_mux_names[pingroups[i].funcs[mux]]);
len = strlen(tegra_mux_names[pingroups[i].funcs[mux]]);
}
}
dbg_pad_field(s, 13-len);
if (pingroups[i].mux_reg == REG_N) {
seq_printf(s, "TEGRA_PUPD_NORMAL");
len = strlen("NORMAL");
} else {
pupd = (pg_readl(TEGRA_PP_PU_PD(pingroups[i].pupd_reg)) >>
pingroups[i].pupd_bit) & 0x3;
seq_printf(s, "TEGRA_PUPD_%s", pupd_name(pupd));
len = strlen(pupd_name(pupd));
}
dbg_pad_field(s, 9 - len);
if (pingroups[i].tri_reg == REG_N) {
seq_printf(s, "TEGRA_TRI_NORMAL");
} else {
tri = (pg_readl(TEGRA_TRI_STATE(pingroups[i].tri_reg)) >>
pingroups[i].tri_bit) & 0x1;
seq_printf(s, "TEGRA_TRI_%s", tri_name(tri));
}
seq_printf(s, "},\n");
}
return 0;
}
static int dbg_pinmux_open(struct inode *inode, struct file *file)
{
return single_open(file, dbg_pinmux_show, &inode->i_private);
}
static const struct file_operations debug_fops = {
.open = dbg_pinmux_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int dbg_drive_pinmux_show(struct seq_file *s, void *unused)
{
int i;
int len;
for (i = 0; i < TEGRA_MAX_DRIVE_PINGROUP; i++) {
u32 reg;
seq_printf(s, "\t{TEGRA_DRIVE_PINGROUP_%s",
drive_pingroups[i].name);
len = strlen(drive_pingroups[i].name);
dbg_pad_field(s, 7 - len);
reg = pg_readl(drive_pingroups[i].reg);
if (HSM_EN(reg)) {
seq_printf(s, "TEGRA_HSM_ENABLE");
len = 16;
} else {
seq_printf(s, "TEGRA_HSM_DISABLE");
len = 17;
}
dbg_pad_field(s, 17 - len);
if (SCHMT_EN(reg)) {
seq_printf(s, "TEGRA_SCHMITT_ENABLE");
len = 21;
} else {
seq_printf(s, "TEGRA_SCHMITT_DISABLE");
len = 22;
}
dbg_pad_field(s, 22 - len);
seq_printf(s, "TEGRA_DRIVE_%s", drive_name(LPMD(reg)));
len = strlen(drive_name(LPMD(reg)));
dbg_pad_field(s, 5 - len);
seq_printf(s, "TEGRA_PULL_%d", DRVDN(reg));
len = DRVDN(reg) < 10 ? 1 : 2;
dbg_pad_field(s, 2 - len);
seq_printf(s, "TEGRA_PULL_%d", DRVUP(reg));
len = DRVUP(reg) < 10 ? 1 : 2;
dbg_pad_field(s, 2 - len);
seq_printf(s, "TEGRA_SLEW_%s", slew_name(SLWR(reg)));
len = strlen(slew_name(SLWR(reg)));
dbg_pad_field(s, 7 - len);
seq_printf(s, "TEGRA_SLEW_%s", slew_name(SLWF(reg)));
seq_printf(s, "},\n");
}
return 0;
}
static int dbg_drive_pinmux_open(struct inode *inode, struct file *file)
{
return single_open(file, dbg_drive_pinmux_show, &inode->i_private);
}
static const struct file_operations debug_drive_fops = {
.open = dbg_drive_pinmux_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int __init tegra_pinmux_debuginit(void)
{
(void) debugfs_create_file("tegra_pinmux", S_IRUGO,
NULL, NULL, &debug_fops);
(void) debugfs_create_file("tegra_pinmux_drive", S_IRUGO,
NULL, NULL, &debug_drive_fops);
return 0;
}
late_initcall(tegra_pinmux_debuginit);
#endif
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