diff options
Diffstat (limited to 'drivers/pinctrl/uniphier/pinctrl-uniphier.h')
| -rw-r--r-- | drivers/pinctrl/uniphier/pinctrl-uniphier.h | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier.h b/drivers/pinctrl/uniphier/pinctrl-uniphier.h new file mode 100644 index 000000000..e1e98b868 --- /dev/null +++ b/drivers/pinctrl/uniphier/pinctrl-uniphier.h @@ -0,0 +1,217 @@ +/* + * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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 __PINCTRL_UNIPHIER_H__ +#define __PINCTRL_UNIPHIER_H__ + +#include <linux/bug.h> +#include <linux/kernel.h> +#include <linux/types.h> + +#define UNIPHIER_PINCTRL_PINMUX_BASE 0x0 +#define UNIPHIER_PINCTRL_LOAD_PINMUX 0x700 +#define UNIPHIER_PINCTRL_DRVCTRL_BASE 0x800 +#define UNIPHIER_PINCTRL_DRV2CTRL_BASE 0x900 +#define UNIPHIER_PINCTRL_PUPDCTRL_BASE 0xa00 +#define UNIPHIER_PINCTRL_IECTRL 0xd00 + +/* input enable control register bit */ +#define UNIPHIER_PIN_IECTRL_SHIFT 0 +#define UNIPHIER_PIN_IECTRL_BITS 8 +#define UNIPHIER_PIN_IECTRL_MASK ((1UL << (UNIPHIER_PIN_IECTRL_BITS)) \ + - 1) + +/* drive strength control register number */ +#define UNIPHIER_PIN_DRVCTRL_SHIFT ((UNIPHIER_PIN_IECTRL_SHIFT) + \ + (UNIPHIER_PIN_IECTRL_BITS)) +#define UNIPHIER_PIN_DRVCTRL_BITS 9 +#define UNIPHIER_PIN_DRVCTRL_MASK ((1UL << (UNIPHIER_PIN_DRVCTRL_BITS)) \ + - 1) + +/* supported drive strength (mA) */ +#define UNIPHIER_PIN_DRV_STR_SHIFT ((UNIPHIER_PIN_DRVCTRL_SHIFT) + \ + (UNIPHIER_PIN_DRVCTRL_BITS)) +#define UNIPHIER_PIN_DRV_STR_BITS 3 +#define UNIPHIER_PIN_DRV_STR_MASK ((1UL << (UNIPHIER_PIN_DRV_STR_BITS)) \ + - 1) + +/* pull-up / pull-down register number */ +#define UNIPHIER_PIN_PUPDCTRL_SHIFT ((UNIPHIER_PIN_DRV_STR_SHIFT) + \ + (UNIPHIER_PIN_DRV_STR_BITS)) +#define UNIPHIER_PIN_PUPDCTRL_BITS 9 +#define UNIPHIER_PIN_PUPDCTRL_MASK ((1UL << (UNIPHIER_PIN_PUPDCTRL_BITS))\ + - 1) + +/* direction of pull register */ +#define UNIPHIER_PIN_PULL_DIR_SHIFT ((UNIPHIER_PIN_PUPDCTRL_SHIFT) + \ + (UNIPHIER_PIN_PUPDCTRL_BITS)) +#define UNIPHIER_PIN_PULL_DIR_BITS 3 +#define UNIPHIER_PIN_PULL_DIR_MASK ((1UL << (UNIPHIER_PIN_PULL_DIR_BITS))\ + - 1) + +#if UNIPHIER_PIN_PULL_DIR_SHIFT + UNIPHIER_PIN_PULL_DIR_BITS > BITS_PER_LONG +#error "unable to pack pin attributes." +#endif + +#define UNIPHIER_PIN_IECTRL_NONE (UNIPHIER_PIN_IECTRL_MASK) + +/* selectable drive strength */ +enum uniphier_pin_drv_str { + UNIPHIER_PIN_DRV_4_8, /* 2 level control: 4/8 mA */ + UNIPHIER_PIN_DRV_8_12_16_20, /* 4 level control: 8/12/16/20 mA */ + UNIPHIER_PIN_DRV_FIXED_4, /* fixed to 4mA */ + UNIPHIER_PIN_DRV_FIXED_5, /* fixed to 5mA */ + UNIPHIER_PIN_DRV_FIXED_8, /* fixed to 8mA */ + UNIPHIER_PIN_DRV_NONE, /* no support (input only pin) */ +}; + +/* direction of pull register (no pin supports bi-directional pull biasing) */ +enum uniphier_pin_pull_dir { + UNIPHIER_PIN_PULL_UP, /* pull-up or disabled */ + UNIPHIER_PIN_PULL_DOWN, /* pull-down or disabled */ + UNIPHIER_PIN_PULL_UP_FIXED, /* always pull-up */ + UNIPHIER_PIN_PULL_DOWN_FIXED, /* always pull-down */ + UNIPHIER_PIN_PULL_NONE, /* no pull register */ +}; + +#define UNIPHIER_PIN_IECTRL(x) \ + (((x) & (UNIPHIER_PIN_IECTRL_MASK)) << (UNIPHIER_PIN_IECTRL_SHIFT)) +#define UNIPHIER_PIN_DRVCTRL(x) \ + (((x) & (UNIPHIER_PIN_DRVCTRL_MASK)) << (UNIPHIER_PIN_DRVCTRL_SHIFT)) +#define UNIPHIER_PIN_DRV_STR(x) \ + (((x) & (UNIPHIER_PIN_DRV_STR_MASK)) << (UNIPHIER_PIN_DRV_STR_SHIFT)) +#define UNIPHIER_PIN_PUPDCTRL(x) \ + (((x) & (UNIPHIER_PIN_PUPDCTRL_MASK)) << (UNIPHIER_PIN_PUPDCTRL_SHIFT)) +#define UNIPHIER_PIN_PULL_DIR(x) \ + (((x) & (UNIPHIER_PIN_PULL_DIR_MASK)) << (UNIPHIER_PIN_PULL_DIR_SHIFT)) + +#define UNIPHIER_PIN_ATTR_PACKED(iectrl, drvctrl, drv_str, pupdctrl, pull_dir)\ + (UNIPHIER_PIN_IECTRL(iectrl) | \ + UNIPHIER_PIN_DRVCTRL(drvctrl) | \ + UNIPHIER_PIN_DRV_STR(drv_str) | \ + UNIPHIER_PIN_PUPDCTRL(pupdctrl) | \ + UNIPHIER_PIN_PULL_DIR(pull_dir)) + +static inline unsigned int uniphier_pin_get_iectrl(void *drv_data) +{ + return ((unsigned long)drv_data >> UNIPHIER_PIN_IECTRL_SHIFT) & + UNIPHIER_PIN_IECTRL_MASK; +} + +static inline unsigned int uniphier_pin_get_drvctrl(void *drv_data) +{ + return ((unsigned long)drv_data >> UNIPHIER_PIN_DRVCTRL_SHIFT) & + UNIPHIER_PIN_DRVCTRL_MASK; +} + +static inline unsigned int uniphier_pin_get_drv_str(void *drv_data) +{ + return ((unsigned long)drv_data >> UNIPHIER_PIN_DRV_STR_SHIFT) & + UNIPHIER_PIN_DRV_STR_MASK; +} + +static inline unsigned int uniphier_pin_get_pupdctrl(void *drv_data) +{ + return ((unsigned long)drv_data >> UNIPHIER_PIN_PUPDCTRL_SHIFT) & + UNIPHIER_PIN_PUPDCTRL_MASK; +} + +static inline unsigned int uniphier_pin_get_pull_dir(void *drv_data) +{ + return ((unsigned long)drv_data >> UNIPHIER_PIN_PULL_DIR_SHIFT) & + UNIPHIER_PIN_PULL_DIR_MASK; +} + +enum uniphier_pinmux_gpio_range_type { + UNIPHIER_PINMUX_GPIO_RANGE_PORT, + UNIPHIER_PINMUX_GPIO_RANGE_IRQ, + UNIPHIER_PINMUX_GPIO_RANGE_NONE, +}; + +struct uniphier_pinctrl_group { + const char *name; + const unsigned *pins; + unsigned num_pins; + const unsigned *muxvals; + enum uniphier_pinmux_gpio_range_type range_type; +}; + +struct uniphier_pinmux_function { + const char *name; + const char * const *groups; + unsigned num_groups; +}; + +struct uniphier_pinctrl_socdata { + const struct uniphier_pinctrl_group *groups; + int groups_count; + const struct uniphier_pinmux_function *functions; + int functions_count; + unsigned mux_bits; + unsigned reg_stride; + bool load_pinctrl; +}; + +#define UNIPHIER_PINCTRL_PIN(a, b, c, d, e, f, g) \ +{ \ + .number = a, \ + .name = b, \ + .drv_data = (void *)UNIPHIER_PIN_ATTR_PACKED(c, d, e, f, g), \ +} + +#define __UNIPHIER_PINCTRL_GROUP(grp, type) \ + { \ + .name = #grp, \ + .pins = grp##_pins, \ + .num_pins = ARRAY_SIZE(grp##_pins), \ + .muxvals = grp##_muxvals + \ + BUILD_BUG_ON_ZERO(ARRAY_SIZE(grp##_pins) != \ + ARRAY_SIZE(grp##_muxvals)), \ + .range_type = type, \ + } + +#define UNIPHIER_PINCTRL_GROUP(grp) \ + __UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_NONE) + +#define UNIPHIER_PINCTRL_GROUP_GPIO_RANGE_PORT(grp) \ + __UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_PORT) + +#define UNIPHIER_PINCTRL_GROUP_GPIO_RANGE_IRQ(grp) \ + __UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_IRQ) + +#define UNIPHIER_PINCTRL_GROUP_SINGLE(grp, array, ofst) \ + { \ + .name = #grp, \ + .pins = array##_pins + ofst, \ + .num_pins = 1, \ + .muxvals = array##_muxvals + ofst, \ + } + +#define UNIPHIER_PINMUX_FUNCTION(func) \ + { \ + .name = #func, \ + .groups = func##_groups, \ + .num_groups = ARRAY_SIZE(func##_groups), \ + } + +struct platform_device; +struct pinctrl_desc; + +int uniphier_pinctrl_probe(struct platform_device *pdev, + struct pinctrl_desc *desc, + struct uniphier_pinctrl_socdata *socdata); + +int uniphier_pinctrl_remove(struct platform_device *pdev); + +#endif /* __PINCTRL_UNIPHIER_H__ */ |