diff options
Diffstat (limited to 'kernel/drivers/pinctrl/pinctrl-tegra.h')
| -rw-r--r-- | kernel/drivers/pinctrl/pinctrl-tegra.h | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/kernel/drivers/pinctrl/pinctrl-tegra.h b/kernel/drivers/pinctrl/pinctrl-tegra.h new file mode 100644 index 000000000..1615db7e3 --- /dev/null +++ b/kernel/drivers/pinctrl/pinctrl-tegra.h @@ -0,0 +1,194 @@ +/* + * Driver for the NVIDIA Tegra pinmux + * + * Copyright (c) 2011, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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 __PINMUX_TEGRA_H__ +#define __PINMUX_TEGRA_H__ + +enum tegra_pinconf_param { + /* argument: tegra_pinconf_pull */ + TEGRA_PINCONF_PARAM_PULL, + /* argument: tegra_pinconf_tristate */ + TEGRA_PINCONF_PARAM_TRISTATE, + /* argument: Boolean */ + TEGRA_PINCONF_PARAM_ENABLE_INPUT, + /* argument: Boolean */ + TEGRA_PINCONF_PARAM_OPEN_DRAIN, + /* argument: Boolean */ + TEGRA_PINCONF_PARAM_LOCK, + /* argument: Boolean */ + TEGRA_PINCONF_PARAM_IORESET, + /* argument: Boolean */ + TEGRA_PINCONF_PARAM_RCV_SEL, + /* argument: Boolean */ + TEGRA_PINCONF_PARAM_HIGH_SPEED_MODE, + /* argument: Boolean */ + TEGRA_PINCONF_PARAM_SCHMITT, + /* argument: Boolean */ + TEGRA_PINCONF_PARAM_LOW_POWER_MODE, + /* argument: Integer, range is HW-dependant */ + TEGRA_PINCONF_PARAM_DRIVE_DOWN_STRENGTH, + /* argument: Integer, range is HW-dependant */ + TEGRA_PINCONF_PARAM_DRIVE_UP_STRENGTH, + /* argument: Integer, range is HW-dependant */ + TEGRA_PINCONF_PARAM_SLEW_RATE_FALLING, + /* argument: Integer, range is HW-dependant */ + TEGRA_PINCONF_PARAM_SLEW_RATE_RISING, + /* argument: Integer, range is HW-dependant */ + TEGRA_PINCONF_PARAM_DRIVE_TYPE, +}; + +enum tegra_pinconf_pull { + TEGRA_PINCONFIG_PULL_NONE, + TEGRA_PINCONFIG_PULL_DOWN, + TEGRA_PINCONFIG_PULL_UP, +}; + +enum tegra_pinconf_tristate { + TEGRA_PINCONFIG_DRIVEN, + TEGRA_PINCONFIG_TRISTATE, +}; + +#define TEGRA_PINCONF_PACK(_param_, _arg_) ((_param_) << 16 | (_arg_)) +#define TEGRA_PINCONF_UNPACK_PARAM(_conf_) ((_conf_) >> 16) +#define TEGRA_PINCONF_UNPACK_ARG(_conf_) ((_conf_) & 0xffff) + +/** + * struct tegra_function - Tegra pinctrl mux function + * @name: The name of the function, exported to pinctrl core. + * @groups: An array of pin groups that may select this function. + * @ngroups: The number of entries in @groups. + */ +struct tegra_function { + const char *name; + const char **groups; + unsigned ngroups; +}; + +/** + * struct tegra_pingroup - Tegra pin group + * @name The name of the pin group. + * @pins An array of pin IDs included in this pin group. + * @npins The number of entries in @pins. + * @funcs The mux functions which can be muxed onto this group. + * @mux_reg: Mux register offset. + * This register contains the mux, einput, odrain, lock, + * ioreset, rcv_sel parameters. + * @mux_bank: Mux register bank. + * @mux_bit: Mux register bit. + * @pupd_reg: Pull-up/down register offset. + * @pupd_bank: Pull-up/down register bank. + * @pupd_bit: Pull-up/down register bit. + * @tri_reg: Tri-state register offset. + * @tri_bank: Tri-state register bank. + * @tri_bit: Tri-state register bit. + * @einput_bit: Enable-input register bit. + * @odrain_bit: Open-drain register bit. + * @lock_bit: Lock register bit. + * @ioreset_bit: IO reset register bit. + * @rcv_sel_bit: Receiver select bit. + * @drv_reg: Drive fields register offset. + * This register contains hsm, schmitt, lpmd, drvdn, + * drvup, slwr, slwf, and drvtype parameters. + * @drv_bank: Drive fields register bank. + * @hsm_bit: High Speed Mode register bit. + * @schmitt_bit: Scmitt register bit. + * @lpmd_bit: Low Power Mode register bit. + * @drvdn_bit: Drive Down register bit. + * @drvdn_width: Drive Down field width. + * @drvup_bit: Drive Up register bit. + * @drvup_width: Drive Up field width. + * @slwr_bit: Slew Rising register bit. + * @slwr_width: Slew Rising field width. + * @slwf_bit: Slew Falling register bit. + * @slwf_width: Slew Falling field width. + * @drvtype_bit: Drive type register bit. + * + * -1 in a *_reg field means that feature is unsupported for this group. + * *_bank and *_reg values are irrelevant when *_reg is -1. + * When *_reg is valid, *_bit may be -1 to indicate an unsupported feature. + * + * A representation of a group of pins (possibly just one pin) in the Tegra + * pin controller. Each group allows some parameter or parameters to be + * configured. The most common is mux function selection. Many others exist + * such as pull-up/down, tri-state, etc. Tegra's pin controller is complex; + * certain groups may only support configuring certain parameters, hence + * each parameter is optional. + */ +struct tegra_pingroup { + const char *name; + const unsigned *pins; + u8 npins; + u8 funcs[4]; + s16 mux_reg; + s16 pupd_reg; + s16 tri_reg; + s16 drv_reg; + u32 mux_bank:2; + u32 pupd_bank:2; + u32 tri_bank:2; + u32 drv_bank:2; + s32 mux_bit:6; + s32 pupd_bit:6; + s32 tri_bit:6; + s32 einput_bit:6; + s32 odrain_bit:6; + s32 lock_bit:6; + s32 ioreset_bit:6; + s32 rcv_sel_bit:6; + s32 hsm_bit:6; + s32 schmitt_bit:6; + s32 lpmd_bit:6; + s32 drvdn_bit:6; + s32 drvup_bit:6; + s32 slwr_bit:6; + s32 slwf_bit:6; + s32 drvtype_bit:6; + s32 drvdn_width:6; + s32 drvup_width:6; + s32 slwr_width:6; + s32 slwf_width:6; +}; + +/** + * struct tegra_pinctrl_soc_data - Tegra pin controller driver configuration + * @ngpios: The number of GPIO pins the pin controller HW affects. + * @pins: An array describing all pins the pin controller affects. + * All pins which are also GPIOs must be listed first within the + * array, and be numbered identically to the GPIO controller's + * numbering. + * @npins: The numbmer of entries in @pins. + * @functions: An array describing all mux functions the SoC supports. + * @nfunctions: The numbmer of entries in @functions. + * @groups: An array describing all pin groups the pin SoC supports. + * @ngroups: The numbmer of entries in @groups. + */ +struct tegra_pinctrl_soc_data { + unsigned ngpios; + const struct pinctrl_pin_desc *pins; + unsigned npins; + struct tegra_function *functions; + unsigned nfunctions; + const struct tegra_pingroup *groups; + unsigned ngroups; + bool hsm_in_mux; + bool schmitt_in_mux; + bool drvtype_in_mux; +}; + +int tegra_pinctrl_probe(struct platform_device *pdev, + const struct tegra_pinctrl_soc_data *soc_data); +int tegra_pinctrl_remove(struct platform_device *pdev); + +#endif |