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Diffstat (limited to 'drivers/pinctrl/pinctrl-tegra.h')
| -rw-r--r-- | drivers/pinctrl/pinctrl-tegra.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/drivers/pinctrl/pinctrl-tegra.h b/drivers/pinctrl/pinctrl-tegra.h new file mode 100644 index 00000000000..782c795326e --- /dev/null +++ b/drivers/pinctrl/pinctrl-tegra.h @@ -0,0 +1,163 @@ +/* + * 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__ + +/** + * 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 * const *groups; + unsigned ngroups; +}; + +/** + * struct tegra_pingroup - Tegra pin group + * @mux_reg: Mux register offset. -1 if unsupported. + * @mux_bank: Mux register bank. 0 if unsupported. + * @mux_bit: Mux register bit. 0 if unsupported. + * @pupd_reg: Pull-up/down register offset. -1 if unsupported. + * @pupd_bank: Pull-up/down register bank. 0 if unsupported. + * @pupd_bit: Pull-up/down register bit. 0 if unsupported. + * @tri_reg: Tri-state register offset. -1 if unsupported. + * @tri_bank: Tri-state register bank. 0 if unsupported. + * @tri_bit: Tri-state register bit. 0 if unsupported. + * @einput_reg: Enable-input register offset. -1 if unsupported. + * @einput_bank: Enable-input register bank. 0 if unsupported. + * @einput_bit: Enable-input register bit. 0 if unsupported. + * @odrain_reg: Open-drain register offset. -1 if unsupported. + * @odrain_bank: Open-drain register bank. 0 if unsupported. + * @odrain_bit: Open-drain register bit. 0 if unsupported. + * @lock_reg: Lock register offset. -1 if unsupported. + * @lock_bank: Lock register bank. 0 if unsupported. + * @lock_bit: Lock register bit. 0 if unsupported. + * @ioreset_reg: IO reset register offset. -1 if unsupported. + * @ioreset_bank: IO reset register bank. 0 if unsupported. + * @ioreset_bit: IO reset register bit. 0 if unsupported. + * @drv_reg: Drive fields register offset. -1 if unsupported. + * This register contains the hsm, schmitt, lpmd, drvdn, + * drvup, slwr, and slwf parameters. + * @drv_bank: Drive fields register bank. 0 if unsupported. + * @hsm_bit: High Speed Mode register bit. 0 if unsupported. + * @schmitt_bit: Scmitt register bit. 0 if unsupported. + * @lpmd_bit: Low Power Mode register bit. 0 if unsupported. + * @drvdn_bit: Drive Down register bit. 0 if unsupported. + * @drvdn_width: Drive Down field width. 0 if unsupported. + * @drvup_bit: Drive Up register bit. 0 if unsupported. + * @drvup_width: Drive Up field width. 0 if unsupported. + * @slwr_bit: Slew Rising register bit. 0 if unsupported. + * @slwr_width: Slew Rising field width. 0 if unsupported. + * @slwf_bit: Slew Falling register bit. 0 if unsupported. + * @slwf_width: Slew Falling field width. 0 if unsupported. + * + * 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, represented by a -1 "reg" value. + */ +struct tegra_pingroup { + const char *name; + const unsigned *pins; + unsigned npins; + unsigned funcs[4]; + unsigned func_safe; + s16 mux_reg; + s16 pupd_reg; + s16 tri_reg; + s16 einput_reg; + s16 odrain_reg; + s16 lock_reg; + s16 ioreset_reg; + s16 drv_reg; + u32 mux_bank:2; + u32 pupd_bank:2; + u32 tri_bank:2; + u32 einput_bank:2; + u32 odrain_bank:2; + u32 ioreset_bank:2; + u32 lock_bank:2; + u32 drv_bank:2; + u32 mux_bit:5; + u32 pupd_bit:5; + u32 tri_bit:5; + u32 einput_bit:5; + u32 odrain_bit:5; + u32 lock_bit:5; + u32 ioreset_bit:5; + u32 hsm_bit:5; + u32 schmitt_bit:5; + u32 lpmd_bit:5; + u32 drvdn_bit:5; + u32 drvup_bit:5; + u32 slwr_bit:5; + u32 slwf_bit:5; + u32 drvdn_width:6; + u32 drvup_width:6; + u32 slwr_width:6; + u32 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; + const struct tegra_function *functions; + unsigned nfunctions; + const struct tegra_pingroup *groups; + unsigned ngroups; +}; + +/** + * tegra_pinctrl_soc_initf() - Retrieve pin controller details for a SoC. + * @soc_data: This pointer must be updated to point at a struct containing + * details of the SoC. + */ +typedef void (*tegra_pinctrl_soc_initf)( + const struct tegra_pinctrl_soc_data **soc_data); + +/** + * tegra20_pinctrl_init() - Retrieve pin controller details for Tegra20 + * @soc_data: This pointer will be updated to point at a struct containing + * details of Tegra20's pin controller. + */ +void tegra20_pinctrl_init(const struct tegra_pinctrl_soc_data **soc_data); +/** + * tegra30_pinctrl_init() - Retrieve pin controller details for Tegra20 + * @soc_data: This pointer will be updated to point at a struct containing + * details of Tegra30's pin controller. + */ +void tegra30_pinctrl_init(const struct tegra_pinctrl_soc_data **soc_data); + +#endif |