[ARM] tegra: pinmux: add safe values, move tegra2, add suspend

- the reset values for some pin groups in the tegra pin mux can result in
functional errors due to conflicting with actively-configured pin groups
muxing from the same controller. this change adds a known safe, non-
conflicting mux for every pin group, which can be used on platforms
where the pin group is not routed to any peripheral

- also add each pin group's I/O voltage rail, to enable platform code to
map from the pin groups used by each interface to the regulators used
for dynamic voltage control

- add routines to individually configure the tristate, pin mux and pull-
ups for a pingroup_config array, so that it is possible to program
individual values at run-time without modifying other values.
this allows driver power-management code to reprogram individual
interfaces into lower power states during idle / suspend, or to
reprogram the pin mux to support multiple physical busses per
internal controller (e.g., sharing a single I2C or SPI controller
across multiple pin groups)

- move chip-specific data like pingroups and drive-pingroups
out of the common code and into chip-specific code

- fix debug output for group with no pullups

- add a TEGRA_MUX_SAFE function.  Setting a pingroup to TEGRA_MUX_SAFE
will automatically select a mux setting that is guaranteed not to
conflict with any of the hardware blocks.

Signed-off-by: Gary King <gking@nvidia.com>

2 files changed, 225 insertions, 159 deletions

diff --git a/arch/arm/mach-tegra/include/mach/pinmux-t2.h b/arch/arm/mach-tegra/include/mach/pinmux-t2.h
new file mode 100644
index 00000000000..e5b9d740f97
--- /dev/null
+++ b/arch/arm/mach-tegra/include/mach/pinmux-t2.h
@@ -0,0 +1,174 @@
+/*
+ * linux/arch/arm/mach-tegra/include/mach/pinmux-t2.h
+ *
+ * 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.
+ *
+ */
+
+#ifndef __MACH_TEGRA_PINMUX_T2_H
+#define __MACH_TEGRA_PINMUX_T2_H
+
+enum tegra_pingroup {
+	TEGRA_PINGROUP_ATA = 0,
+	TEGRA_PINGROUP_ATB,
+	TEGRA_PINGROUP_ATC,
+	TEGRA_PINGROUP_ATD,
+	TEGRA_PINGROUP_ATE,
+	TEGRA_PINGROUP_CDEV1,
+	TEGRA_PINGROUP_CDEV2,
+	TEGRA_PINGROUP_CRTP,
+	TEGRA_PINGROUP_CSUS,
+	TEGRA_PINGROUP_DAP1,
+	TEGRA_PINGROUP_DAP2,
+	TEGRA_PINGROUP_DAP3,
+	TEGRA_PINGROUP_DAP4,
+	TEGRA_PINGROUP_DDC,
+	TEGRA_PINGROUP_DTA,
+	TEGRA_PINGROUP_DTB,
+	TEGRA_PINGROUP_DTC,
+	TEGRA_PINGROUP_DTD,
+	TEGRA_PINGROUP_DTE,
+	TEGRA_PINGROUP_DTF,
+	TEGRA_PINGROUP_GMA,
+	TEGRA_PINGROUP_GMB,
+	TEGRA_PINGROUP_GMC,
+	TEGRA_PINGROUP_GMD,
+	TEGRA_PINGROUP_GME,
+	TEGRA_PINGROUP_GPU,
+	TEGRA_PINGROUP_GPU7,
+	TEGRA_PINGROUP_GPV,
+	TEGRA_PINGROUP_HDINT,
+	TEGRA_PINGROUP_I2CP,
+	TEGRA_PINGROUP_IRRX,
+	TEGRA_PINGROUP_IRTX,
+	TEGRA_PINGROUP_KBCA,
+	TEGRA_PINGROUP_KBCB,
+	TEGRA_PINGROUP_KBCC,
+	TEGRA_PINGROUP_KBCD,
+	TEGRA_PINGROUP_KBCE,
+	TEGRA_PINGROUP_KBCF,
+	TEGRA_PINGROUP_LCSN,
+	TEGRA_PINGROUP_LD0,
+	TEGRA_PINGROUP_LD1,
+	TEGRA_PINGROUP_LD10,
+	TEGRA_PINGROUP_LD11,
+	TEGRA_PINGROUP_LD12,
+	TEGRA_PINGROUP_LD13,
+	TEGRA_PINGROUP_LD14,
+	TEGRA_PINGROUP_LD15,
+	TEGRA_PINGROUP_LD16,
+	TEGRA_PINGROUP_LD17,
+	TEGRA_PINGROUP_LD2,
+	TEGRA_PINGROUP_LD3,
+	TEGRA_PINGROUP_LD4,
+	TEGRA_PINGROUP_LD5,
+	TEGRA_PINGROUP_LD6,
+	TEGRA_PINGROUP_LD7,
+	TEGRA_PINGROUP_LD8,
+	TEGRA_PINGROUP_LD9,
+	TEGRA_PINGROUP_LDC,
+	TEGRA_PINGROUP_LDI,
+	TEGRA_PINGROUP_LHP0,
+	TEGRA_PINGROUP_LHP1,
+	TEGRA_PINGROUP_LHP2,
+	TEGRA_PINGROUP_LHS,
+	TEGRA_PINGROUP_LM0,
+	TEGRA_PINGROUP_LM1,
+	TEGRA_PINGROUP_LPP,
+	TEGRA_PINGROUP_LPW0,
+	TEGRA_PINGROUP_LPW1,
+	TEGRA_PINGROUP_LPW2,
+	TEGRA_PINGROUP_LSC0,
+	TEGRA_PINGROUP_LSC1,
+	TEGRA_PINGROUP_LSCK,
+	TEGRA_PINGROUP_LSDA,
+	TEGRA_PINGROUP_LSDI,
+	TEGRA_PINGROUP_LSPI,
+	TEGRA_PINGROUP_LVP0,
+	TEGRA_PINGROUP_LVP1,
+	TEGRA_PINGROUP_LVS,
+	TEGRA_PINGROUP_OWC,
+	TEGRA_PINGROUP_PMC,
+	TEGRA_PINGROUP_PTA,
+	TEGRA_PINGROUP_RM,
+	TEGRA_PINGROUP_SDB,
+	TEGRA_PINGROUP_SDC,
+	TEGRA_PINGROUP_SDD,
+	TEGRA_PINGROUP_SDIO1,
+	TEGRA_PINGROUP_SLXA,
+	TEGRA_PINGROUP_SLXC,
+	TEGRA_PINGROUP_SLXD,
+	TEGRA_PINGROUP_SLXK,
+	TEGRA_PINGROUP_SPDI,
+	TEGRA_PINGROUP_SPDO,
+	TEGRA_PINGROUP_SPIA,
+	TEGRA_PINGROUP_SPIB,
+	TEGRA_PINGROUP_SPIC,
+	TEGRA_PINGROUP_SPID,
+	TEGRA_PINGROUP_SPIE,
+	TEGRA_PINGROUP_SPIF,
+	TEGRA_PINGROUP_SPIG,
+	TEGRA_PINGROUP_SPIH,
+	TEGRA_PINGROUP_UAA,
+	TEGRA_PINGROUP_UAB,
+	TEGRA_PINGROUP_UAC,
+	TEGRA_PINGROUP_UAD,
+	TEGRA_PINGROUP_UCA,
+	TEGRA_PINGROUP_UCB,
+	TEGRA_PINGROUP_UDA,
+	/* these pin groups only have pullup and pull down control */
+	TEGRA_PINGROUP_CK32,
+	TEGRA_PINGROUP_DDRC,
+	TEGRA_PINGROUP_PMCA,
+	TEGRA_PINGROUP_PMCB,
+	TEGRA_PINGROUP_PMCC,
+	TEGRA_PINGROUP_PMCD,
+	TEGRA_PINGROUP_PMCE,
+	TEGRA_PINGROUP_XM2C,
+	TEGRA_PINGROUP_XM2D,
+	TEGRA_MAX_PINGROUP,
+};
+
+enum tegra_drive_pingroup {
+	TEGRA_DRIVE_PINGROUP_AO1 = 0,
+	TEGRA_DRIVE_PINGROUP_AO2,
+	TEGRA_DRIVE_PINGROUP_AT1,
+	TEGRA_DRIVE_PINGROUP_AT2,
+	TEGRA_DRIVE_PINGROUP_CDEV1,
+	TEGRA_DRIVE_PINGROUP_CDEV2,
+	TEGRA_DRIVE_PINGROUP_CSUS,
+	TEGRA_DRIVE_PINGROUP_DAP1,
+	TEGRA_DRIVE_PINGROUP_DAP2,
+	TEGRA_DRIVE_PINGROUP_DAP3,
+	TEGRA_DRIVE_PINGROUP_DAP4,
+	TEGRA_DRIVE_PINGROUP_DBG,
+	TEGRA_DRIVE_PINGROUP_LCD1,
+	TEGRA_DRIVE_PINGROUP_LCD2,
+	TEGRA_DRIVE_PINGROUP_SDMMC2,
+	TEGRA_DRIVE_PINGROUP_SDMMC3,
+	TEGRA_DRIVE_PINGROUP_SPI,
+	TEGRA_DRIVE_PINGROUP_UAA,
+	TEGRA_DRIVE_PINGROUP_UAB,
+	TEGRA_DRIVE_PINGROUP_UART2,
+	TEGRA_DRIVE_PINGROUP_UART3,
+	TEGRA_DRIVE_PINGROUP_VI1,
+	TEGRA_DRIVE_PINGROUP_VI2,
+	TEGRA_DRIVE_PINGROUP_XM2A,
+	TEGRA_DRIVE_PINGROUP_XM2C,
+	TEGRA_DRIVE_PINGROUP_XM2D,
+	TEGRA_DRIVE_PINGROUP_XM2CLK,
+	TEGRA_DRIVE_PINGROUP_MEMCOMP,
+	TEGRA_MAX_DRIVE_PINGROUP,
+};
+
+#endif
+
diff --git a/arch/arm/mach-tegra/include/mach/pinmux.h b/arch/arm/mach-tegra/include/mach/pinmux.h
index 41c8ce5b7c2..defd8775def 100644
--- a/arch/arm/mach-tegra/include/mach/pinmux.h
+++ b/arch/arm/mach-tegra/include/mach/pinmux.h
@@ -17,126 +17,11 @@
 #ifndef __MACH_TEGRA_PINMUX_H
 #define __MACH_TEGRA_PINMUX_H
 
-enum tegra_pingroup {
-	TEGRA_PINGROUP_ATA = 0,
-	TEGRA_PINGROUP_ATB,
-	TEGRA_PINGROUP_ATC,
-	TEGRA_PINGROUP_ATD,
-	TEGRA_PINGROUP_ATE,
-	TEGRA_PINGROUP_CDEV1,
-	TEGRA_PINGROUP_CDEV2,
-	TEGRA_PINGROUP_CRTP,
-	TEGRA_PINGROUP_CSUS,
-	TEGRA_PINGROUP_DAP1,
-	TEGRA_PINGROUP_DAP2,
-	TEGRA_PINGROUP_DAP3,
-	TEGRA_PINGROUP_DAP4,
-	TEGRA_PINGROUP_DDC,
-	TEGRA_PINGROUP_DTA,
-	TEGRA_PINGROUP_DTB,
-	TEGRA_PINGROUP_DTC,
-	TEGRA_PINGROUP_DTD,
-	TEGRA_PINGROUP_DTE,
-	TEGRA_PINGROUP_DTF,
-	TEGRA_PINGROUP_GMA,
-	TEGRA_PINGROUP_GMB,
-	TEGRA_PINGROUP_GMC,
-	TEGRA_PINGROUP_GMD,
-	TEGRA_PINGROUP_GME,
-	TEGRA_PINGROUP_GPU,
-	TEGRA_PINGROUP_GPU7,
-	TEGRA_PINGROUP_GPV,
-	TEGRA_PINGROUP_HDINT,
-	TEGRA_PINGROUP_I2CP,
-	TEGRA_PINGROUP_IRRX,
-	TEGRA_PINGROUP_IRTX,
-	TEGRA_PINGROUP_KBCA,
-	TEGRA_PINGROUP_KBCB,
-	TEGRA_PINGROUP_KBCC,
-	TEGRA_PINGROUP_KBCD,
-	TEGRA_PINGROUP_KBCE,
-	TEGRA_PINGROUP_KBCF,
-	TEGRA_PINGROUP_LCSN,
-	TEGRA_PINGROUP_LD0,
-	TEGRA_PINGROUP_LD1,
-	TEGRA_PINGROUP_LD10,
-	TEGRA_PINGROUP_LD11,
-	TEGRA_PINGROUP_LD12,
-	TEGRA_PINGROUP_LD13,
-	TEGRA_PINGROUP_LD14,
-	TEGRA_PINGROUP_LD15,
-	TEGRA_PINGROUP_LD16,
-	TEGRA_PINGROUP_LD17,
-	TEGRA_PINGROUP_LD2,
-	TEGRA_PINGROUP_LD3,
-	TEGRA_PINGROUP_LD4,
-	TEGRA_PINGROUP_LD5,
-	TEGRA_PINGROUP_LD6,
-	TEGRA_PINGROUP_LD7,
-	TEGRA_PINGROUP_LD8,
-	TEGRA_PINGROUP_LD9,
-	TEGRA_PINGROUP_LDC,
-	TEGRA_PINGROUP_LDI,
-	TEGRA_PINGROUP_LHP0,
-	TEGRA_PINGROUP_LHP1,
-	TEGRA_PINGROUP_LHP2,
-	TEGRA_PINGROUP_LHS,
-	TEGRA_PINGROUP_LM0,
-	TEGRA_PINGROUP_LM1,
-	TEGRA_PINGROUP_LPP,
-	TEGRA_PINGROUP_LPW0,
-	TEGRA_PINGROUP_LPW1,
-	TEGRA_PINGROUP_LPW2,
-	TEGRA_PINGROUP_LSC0,
-	TEGRA_PINGROUP_LSC1,
-	TEGRA_PINGROUP_LSCK,
-	TEGRA_PINGROUP_LSDA,
-	TEGRA_PINGROUP_LSDI,
-	TEGRA_PINGROUP_LSPI,
-	TEGRA_PINGROUP_LVP0,
-	TEGRA_PINGROUP_LVP1,
-	TEGRA_PINGROUP_LVS,
-	TEGRA_PINGROUP_OWC,
-	TEGRA_PINGROUP_PMC,
-	TEGRA_PINGROUP_PTA,
-	TEGRA_PINGROUP_RM,
-	TEGRA_PINGROUP_SDB,
-	TEGRA_PINGROUP_SDC,
-	TEGRA_PINGROUP_SDD,
-	TEGRA_PINGROUP_SDIO1,
-	TEGRA_PINGROUP_SLXA,
-	TEGRA_PINGROUP_SLXC,
-	TEGRA_PINGROUP_SLXD,
-	TEGRA_PINGROUP_SLXK,
-	TEGRA_PINGROUP_SPDI,
-	TEGRA_PINGROUP_SPDO,
-	TEGRA_PINGROUP_SPIA,
-	TEGRA_PINGROUP_SPIB,
-	TEGRA_PINGROUP_SPIC,
-	TEGRA_PINGROUP_SPID,
-	TEGRA_PINGROUP_SPIE,
-	TEGRA_PINGROUP_SPIF,
-	TEGRA_PINGROUP_SPIG,
-	TEGRA_PINGROUP_SPIH,
-	TEGRA_PINGROUP_UAA,
-	TEGRA_PINGROUP_UAB,
-	TEGRA_PINGROUP_UAC,
-	TEGRA_PINGROUP_UAD,
-	TEGRA_PINGROUP_UCA,
-	TEGRA_PINGROUP_UCB,
-	TEGRA_PINGROUP_UDA,
-	/* these pin groups only have pullup and pull down control */
-	TEGRA_PINGROUP_CK32,
-	TEGRA_PINGROUP_DDRC,
-	TEGRA_PINGROUP_PMCA,
-	TEGRA_PINGROUP_PMCB,
-	TEGRA_PINGROUP_PMCC,
-	TEGRA_PINGROUP_PMCD,
-	TEGRA_PINGROUP_PMCE,
-	TEGRA_PINGROUP_XM2C,
-	TEGRA_PINGROUP_XM2D,
-	TEGRA_MAX_PINGROUP,
-};
+#if defined(CONFIG_ARCH_TEGRA_2x_SOC)
+#include "pinmux-t2.h"
+#else
+#error "Undefined Tegra architecture"
+#endif
 
 enum tegra_mux_func {
 	TEGRA_MUX_RSVD = 0x8000,
@@ -205,6 +90,7 @@ enum tegra_mux_func {
 	TEGRA_MUX_VI,
 	TEGRA_MUX_VI_SENSOR_CLK,
 	TEGRA_MUX_XIO,
+	TEGRA_MUX_SAFE,
 	TEGRA_MAX_MUX,
 };
 
@@ -219,6 +105,18 @@ enum tegra_tristate {
 	TEGRA_TRI_TRISTATE = 1,
 };
 
+enum tegra_vddio {
+	TEGRA_VDDIO_BB = 0,
+	TEGRA_VDDIO_LCD,
+	TEGRA_VDDIO_VI,
+	TEGRA_VDDIO_UART,
+	TEGRA_VDDIO_DDR,
+	TEGRA_VDDIO_NAND,
+	TEGRA_VDDIO_SYS,
+	TEGRA_VDDIO_AUDIO,
+	TEGRA_VDDIO_SD,
+};
+
 struct tegra_pingroup_config {
 	enum tegra_pingroup	pingroup;
 	enum tegra_mux_func	func;
@@ -270,38 +168,6 @@ enum tegra_pull_strength {
 	TEGRA_MAX_PULL,
 };
 
-enum tegra_drive_pingroup {
-	TEGRA_DRIVE_PINGROUP_AO1 = 0,
-	TEGRA_DRIVE_PINGROUP_AO2,
-	TEGRA_DRIVE_PINGROUP_AT1,
-	TEGRA_DRIVE_PINGROUP_AT2,
-	TEGRA_DRIVE_PINGROUP_CDEV1,
-	TEGRA_DRIVE_PINGROUP_CDEV2,
-	TEGRA_DRIVE_PINGROUP_CSUS,
-	TEGRA_DRIVE_PINGROUP_DAP1,
-	TEGRA_DRIVE_PINGROUP_DAP2,
-	TEGRA_DRIVE_PINGROUP_DAP3,
-	TEGRA_DRIVE_PINGROUP_DAP4,
-	TEGRA_DRIVE_PINGROUP_DBG,
-	TEGRA_DRIVE_PINGROUP_LCD1,
-	TEGRA_DRIVE_PINGROUP_LCD2,
-	TEGRA_DRIVE_PINGROUP_SDMMC2,
-	TEGRA_DRIVE_PINGROUP_SDMMC3,
-	TEGRA_DRIVE_PINGROUP_SPI,
-	TEGRA_DRIVE_PINGROUP_UAA,
-	TEGRA_DRIVE_PINGROUP_UAB,
-	TEGRA_DRIVE_PINGROUP_UART2,
-	TEGRA_DRIVE_PINGROUP_UART3,
-	TEGRA_DRIVE_PINGROUP_VI1,
-	TEGRA_DRIVE_PINGROUP_VI2,
-	TEGRA_DRIVE_PINGROUP_XM2A,
-	TEGRA_DRIVE_PINGROUP_XM2C,
-	TEGRA_DRIVE_PINGROUP_XM2D,
-	TEGRA_DRIVE_PINGROUP_XM2CLK,
-	TEGRA_DRIVE_PINGROUP_MEMCOMP,
-	TEGRA_MAX_DRIVE_PINGROUP,
-};
-
 enum tegra_drive {
 	TEGRA_DRIVE_DIV_8 = 0,
 	TEGRA_DRIVE_DIV_4,
@@ -331,18 +197,44 @@ struct tegra_drive_pingroup_config {
 	enum tegra_slew slew_falling;
 };
 
-int tegra_pinmux_set_func(enum tegra_pingroup pg, enum tegra_mux_func func);
-int tegra_pinmux_set_tristate(enum tegra_pingroup pg, enum tegra_tristate tristate);
-int tegra_pinmux_set_pullupdown(enum tegra_pingroup pg, enum tegra_pullupdown pupd);
+struct tegra_drive_pingroup_desc {
+	const char *name;
+	s16 reg;
+};
+
+struct tegra_pingroup_desc {
+	const char *name;
+	int funcs[4];
+	int func_safe;
+	int vddio;
+	s16 tri_reg; 	/* offset into the TRISTATE_REG_* register bank */
+	s16 mux_reg;	/* offset into the PIN_MUX_CTL_* register bank */
+	s16 pupd_reg;	/* offset into the PULL_UPDOWN_REG_* register bank */
+	s8 tri_bit; 	/* offset into the TRISTATE_REG_* register bit */
+	s8 mux_bit;	/* offset into the PIN_MUX_CTL_* register bit */
+	s8 pupd_bit;	/* offset into the PULL_UPDOWN_REG_* register bit */
+};
+
+extern const struct tegra_pingroup_desc tegra_soc_pingroups[];
+extern const struct tegra_drive_pingroup_desc tegra_soc_drive_pingroups[];
 
-void tegra_pinmux_config_pingroup(enum tegra_pingroup pingroup,
-	enum tegra_mux_func func, enum tegra_pullupdown pupd,
+int tegra_pinmux_set_tristate(enum tegra_pingroup pg,
 	enum tegra_tristate tristate);
+int tegra_pinmux_set_pullupdown(enum tegra_pingroup pg,
+	enum tegra_pullupdown pupd);
 
-void tegra_pinmux_config_table(struct tegra_pingroup_config *config, int len);
+void tegra_pinmux_config_table(const struct tegra_pingroup_config *config,
+	int len);
 
 void tegra_drive_pinmux_config_table(struct tegra_drive_pingroup_config *config,
 	int len);
-
+void tegra_pinmux_set_safe_pinmux_table(const struct tegra_pingroup_config *config,
+	int len);
+void tegra_pinmux_config_pinmux_table(const struct tegra_pingroup_config *config,
+	int len);
+void tegra_pinmux_config_tristate_table(const struct tegra_pingroup_config *config,
+	int len, enum tegra_tristate tristate);
+void tegra_pinmux_config_pullupdown_table(const struct tegra_pingroup_config *config,
+	int len, enum tegra_pullupdown pupd);
 #endif