diff options
| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/pinctrl-st.txt | 110 | ||||
| -rw-r--r-- | drivers/base/regmap/internal.h | 8 | ||||
| -rw-r--r-- | drivers/base/regmap/regmap.c | 130 | ||||
| -rw-r--r-- | drivers/pinctrl/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/pinctrl/Makefile | 1 | ||||
| -rw-r--r-- | drivers/pinctrl/pinctrl-st.c | 1403 | ||||
| -rw-r--r-- | include/linux/regmap.h | 31 |
7 files changed, 1689 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-st.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-st.txt new file mode 100644 index 000000000000..05bf82a07dfd --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-st.txt @@ -0,0 +1,110 @@ +*ST pin controller. + +Each multi-function pin is controlled, driven and routed through the +PIO multiplexing block. Each pin supports GPIO functionality (ALT0) +and multiple alternate functions(ALT1 - ALTx) that directly connect +the pin to different hardware blocks. + +When a pin is in GPIO mode, Output Enable (OE), Open Drain(OD), and +Pull Up (PU) are driven by the related PIO block. + +ST pinctrl driver controls PIO multiplexing block and also interacts with +gpio driver to configure a pin. + +Required properties: (PIO multiplexing block) +- compatible : should be "st,<SOC>-<pio-block>-pinctrl" + like st,stih415-sbc-pinctrl, st,stih415-front-pinctrl and so on. +- gpio-controller : Indicates this device is a GPIO controller +- #gpio-cells : Should be one. The first cell is the pin number. +- st,retime-pin-mask : Should be mask to specify which pins can be retimed. + If the property is not present, it is assumed that all the pins in the + bank are capable of retiming. Retiming is mainly used to improve the + IO timing margins of external synchronous interfaces. +- st,bank-name : Should be a name string for this bank as + specified in datasheet. +- st,syscfg : Should be a phandle of the syscfg node. + +Example: + pin-controller-sbc { + #address-cells = <1>; + #size-cells = <1>; + compatible = "st,stih415-sbc-pinctrl"; + st,syscfg = <&syscfg_sbc>; + ranges = <0 0xfe610000 0x5000>; + PIO0: gpio@fe610000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0 0x100>; + st,bank-name = "PIO0"; + }; + ... + pin-functions nodes follow... + }; + + +Contents of function subnode node: +---------------------- +Required properties for pin configuration node: +- st,pins : Child node with list of pins with configuration. + +Below is the format of how each pin conf should look like. + +<bank offset mux mode rt_type rt_delay rt_clk> + +Every PIO is represented with 4-7 parameters depending on retime configuration. +Each parameter is explained as below. + +-bank : Should be bank phandle to which this PIO belongs. +-offset : Offset in the PIO bank. +-mux : Should be alternate function number associated this pin. + Use same numbers from datasheet. +-mode :pin configuration is selected from one of the below values. + IN + IN_PU + OUT + BIDIR + BIDIR_PU + +-rt_type Retiming Configuration for the pin. + Possible retime configuration are: + + ------- ------------- + value args + ------- ------------- + NICLK <delay> <clk> + ICLK_IO <delay> <clk> + BYPASS <delay> + DE_IO <delay> <clk> + SE_ICLK_IO <delay> <clk> + SE_NICLK_IO <delay> <clk> + +- delay is retime delay in pico seconds as mentioned in data sheet. + +- rt_clk :clk to be use for retime. + Possible values are: + CLK_A + CLK_B + CLK_C + CLK_D + +Example of mmcclk pin which is a bi-direction pull pu with retime config +as non inverted clock retimed with CLK_B and delay of 0 pico seconds: + +pin-controller { + ... + mmc0 { + pinctrl_mmc: mmc { + st,pins { + mmcclk = <&PIO13 4 ALT4 BIDIR_PU NICLK 0 CLK_B>; + ... + }; + }; + ... + }; +}; + +sdhci0:sdhci@fe810000{ + ... + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_mmc>; +}; diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h index ae23d8391aa0..29c83160ca29 100644 --- a/drivers/base/regmap/internal.h +++ b/drivers/base/regmap/internal.h @@ -176,6 +176,14 @@ struct regmap_range_node { unsigned int window_len; }; +struct regmap_field { + struct regmap *regmap; + unsigned int mask; + /* lsb */ + unsigned int shift; + unsigned int reg; +}; + #ifdef CONFIG_DEBUG_FS extern void regmap_debugfs_initcall(void); extern void regmap_debugfs_init(struct regmap *map, const char *name); diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index ed152e3d2d88..95920583e31e 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -807,6 +807,95 @@ struct regmap *devm_regmap_init(struct device *dev, } EXPORT_SYMBOL_GPL(devm_regmap_init); +static void regmap_field_init(struct regmap_field *rm_field, + struct regmap *regmap, struct reg_field reg_field) +{ + int field_bits = reg_field.msb - reg_field.lsb + 1; + rm_field->regmap = regmap; + rm_field->reg = reg_field.reg; + rm_field->shift = reg_field.lsb; + rm_field->mask = ((BIT(field_bits) - 1) << reg_field.lsb); +} + +/** + * devm_regmap_field_alloc(): Allocate and initialise a register field + * in a register map. + * + * @dev: Device that will be interacted with + * @regmap: regmap bank in which this register field is located. + * @reg_field: Register field with in the bank. + * + * The return value will be an ERR_PTR() on error or a valid pointer + * to a struct regmap_field. The regmap_field will be automatically freed + * by the device management code. + */ +struct regmap_field *devm_regmap_field_alloc(struct device *dev, + struct regmap *regmap, struct reg_field reg_field) +{ + struct regmap_field *rm_field = devm_kzalloc(dev, + sizeof(*rm_field), GFP_KERNEL); + if (!rm_field) + return ERR_PTR(-ENOMEM); + + regmap_field_init(rm_field, regmap, reg_field); + + return rm_field; + +} +EXPORT_SYMBOL_GPL(devm_regmap_field_alloc); + +/** + * devm_regmap_field_free(): Free register field allocated using + * devm_regmap_field_alloc. Usally drivers need not call this function, + * as the memory allocated via devm will be freed as per device-driver + * life-cyle. + * + * @dev: Device that will be interacted with + * @field: regmap field which should be freed. + */ +void devm_regmap_field_free(struct device *dev, + struct regmap_field *field) +{ + devm_kfree(dev, field); +} +EXPORT_SYMBOL_GPL(devm_regmap_field_free); + +/** + * regmap_field_alloc(): Allocate and initialise a register field + * in a register map. + * + * @regmap: regmap bank in which this register field is located. + * @reg_field: Register field with in the bank. + * + * The return value will be an ERR_PTR() on error or a valid pointer + * to a struct regmap_field. The regmap_field should be freed by the + * user once its finished working with it using regmap_field_free(). + */ +struct regmap_field *regmap_field_alloc(struct regmap *regmap, + struct reg_field reg_field) +{ + struct regmap_field *rm_field = kzalloc(sizeof(*rm_field), GFP_KERNEL); + + if (!rm_field) + return ERR_PTR(-ENOMEM); + + regmap_field_init(rm_field, regmap, reg_field); + + return rm_field; +} +EXPORT_SYMBOL_GPL(regmap_field_alloc); + +/** + * regmap_field_free(): Free register field allocated using regmap_field_alloc + * + * @field: regmap field which should be freed. + */ +void regmap_field_free(struct regmap_field *field) +{ + kfree(field); +} +EXPORT_SYMBOL_GPL(regmap_field_free); + /** * regmap_reinit_cache(): Reinitialise the current register cache * @@ -1255,6 +1344,22 @@ int regmap_raw_write(struct regmap *map, unsigned int reg, } EXPORT_SYMBOL_GPL(regmap_raw_write); +/** + * regmap_field_write(): Write a value to a single register field + * + * @field: Register field to write to + * @val: Value to be written + * + * A value of zero will be returned on success, a negative errno will + * be returned in error cases. + */ +int regmap_field_write(struct regmap_field *field, unsigned int val) +{ + return regmap_update_bits(field->regmap, field->reg, + field->mask, val << field->shift); +} +EXPORT_SYMBOL_GPL(regmap_field_write); + /* * regmap_bulk_write(): Write multiple registers to the device * @@ -1538,6 +1643,31 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val, EXPORT_SYMBOL_GPL(regmap_raw_read); /** + * regmap_field_read(): Read a value to a single register field + * + * @field: Register field to read from + * @val: Pointer to store read value + * + * A value of zero will be returned on success, a negative errno will + * be returned in error cases. + */ +int regmap_field_read(struct regmap_field *field, unsigned int *val) +{ + int ret; + unsigned int reg_val; + ret = regmap_read(field->regmap, field->reg, ®_val); + if (ret != 0) + return ret; + + reg_val &= field->mask; + reg_val >>= field->shift; + *val = reg_val; + + return ret; +} +EXPORT_SYMBOL_GPL(regmap_field_read); + +/** * regmap_bulk_read(): Read multiple registers from the device * * @map: Register map to write to diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 8f6692438149..1a147cf821f3 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -169,6 +169,12 @@ config PINCTRL_SUNXI select PINMUX select GENERIC_PINCONF +config PINCTRL_ST + bool + depends on OF + select PINMUX + select PINCONF + config PINCTRL_TEGRA bool select PINMUX diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 9bdaeb8785ce..6fc78445d0fc 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -45,6 +45,7 @@ obj-$(CONFIG_PINCTRL_EXYNOS5440) += pinctrl-exynos5440.o obj-$(CONFIG_PINCTRL_S3C64XX) += pinctrl-s3c64xx.o obj-$(CONFIG_PINCTRL_XWAY) += pinctrl-xway.o obj-$(CONFIG_PINCTRL_LANTIQ) += pinctrl-lantiq.o +obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o obj-$(CONFIG_PLAT_ORION) += mvebu/ obj-$(CONFIG_ARCH_SHMOBILE) += sh-pfc/ diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c new file mode 100644 index 000000000000..04d4506ae18d --- /dev/null +++ b/drivers/pinctrl/pinctrl-st.c @@ -0,0 +1,1403 @@ +/* + * Copyright (C) 2013 STMicroelectronics (R&D) Limited. + * Authors: + * Srinivas Kandagatla <srinivas.kandagatla@st.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_gpio.h> +#include <linux/of_address.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> +#include <linux/pinctrl/pinconf.h> +#include <linux/platform_device.h> +#include "core.h" + +/* PIO Block registers */ +/* PIO output */ +#define REG_PIO_POUT 0x00 +/* Set bits of POUT */ +#define REG_PIO_SET_POUT 0x04 +/* Clear bits of POUT */ +#define REG_PIO_CLR_POUT 0x08 +/* PIO input */ +#define REG_PIO_PIN 0x10 +/* PIO configuration */ +#define REG_PIO_PC(n) (0x20 + (n) * 0x10) +/* Set bits of PC[2:0] */ +#define REG_PIO_SET_PC(n) (0x24 + (n) * 0x10) +/* Clear bits of PC[2:0] */ +#define REG_PIO_CLR_PC(n) (0x28 + (n) * 0x10) +/* PIO input comparison */ +#define REG_PIO_PCOMP 0x50 +/* Set bits of PCOMP */ +#define REG_PIO_SET_PCOMP 0x54 +/* Clear bits of PCOMP */ +#define REG_PIO_CLR_PCOMP 0x58 +/* PIO input comparison mask */ +#define REG_PIO_PMASK 0x60 +/* Set bits of PMASK */ +#define REG_PIO_SET_PMASK 0x64 +/* Clear bits of PMASK */ +#define REG_PIO_CLR_PMASK 0x68 + +#define ST_GPIO_DIRECTION_BIDIR 0x1 +#define ST_GPIO_DIRECTION_OUT 0x2 +#define ST_GPIO_DIRECTION_IN 0x4 + +/** + * Packed style retime configuration. + * There are two registers cfg0 and cfg1 in this style for each bank. + * Each field in this register is 8 bit corresponding to 8 pins in the bank. + */ +#define RT_P_CFGS_PER_BANK 2 +#define RT_P_CFG0_CLK1NOTCLK0_FIELD(reg) REG_FIELD(reg, 0, 7) +#define RT_P_CFG0_DELAY_0_FIELD(reg) REG_FIELD(reg, 16, 23) +#define RT_P_CFG0_DELAY_1_FIELD(reg) REG_FIELD(reg, 24, 31) +#define RT_P_CFG1_INVERTCLK_FIELD(reg) REG_FIELD(reg, 0, 7) +#define RT_P_CFG1_RETIME_FIELD(reg) REG_FIELD(reg, 8, 15) +#define RT_P_CFG1_CLKNOTDATA_FIELD(reg) REG_FIELD(reg, 16, 23) +#define RT_P_CFG1_DOUBLE_EDGE_FIELD(reg) REG_FIELD(reg, 24, 31) + +/** + * Dedicated style retime Configuration register + * each register is dedicated per pin. + */ +#define RT_D_CFGS_PER_BANK 8 +#define RT_D_CFG_CLK_SHIFT 0 +#define RT_D_CFG_CLK_MASK (0x3 << 0) +#define RT_D_CFG_CLKNOTDATA_SHIFT 2 +#define RT_D_CFG_CLKNOTDATA_MASK BIT(2) +#define RT_D_CFG_DELAY_SHIFT 3 +#define RT_D_CFG_DELAY_MASK (0xf << 3) +#define RT_D_CFG_DELAY_INNOTOUT_SHIFT 7 +#define RT_D_CFG_DELAY_INNOTOUT_MASK BIT(7) +#define RT_D_CFG_DOUBLE_EDGE_SHIFT 8 +#define RT_D_CFG_DOUBLE_EDGE_MASK BIT(8) +#define RT_D_CFG_INVERTCLK_SHIFT 9 +#define RT_D_CFG_INVERTCLK_MASK BIT(9) +#define RT_D_CFG_RETIME_SHIFT 10 +#define RT_D_CFG_RETIME_MASK BIT(10) + +/* + * Pinconf is represented in an opaque unsigned long variable. + * Below is the bit allocation details for each possible configuration. + * All the bit fields can be encapsulated into four variables + * (direction, retime-type, retime-clk, retime-delay) + * + * +----------------+ + *[31:28]| reserved-3 | + * +----------------+------------- + *[27] | oe | | + * +----------------+ v + *[26] | pu | [Direction ] + * +----------------+ ^ + *[25] | od | | + * +----------------+------------- + *[24] | reserved-2 | + * +----------------+------------- + *[23] | retime | | + * +----------------+ | + *[22] | retime-invclk | | + * +----------------+ v + *[21] |retime-clknotdat| [Retime-type ] + * +----------------+ ^ + *[20] | retime-de | | + * +----------------+------------- + *[19:18]| retime-clk |------>[Retime-Clk ] + * +----------------+ + *[17:16]| reserved-1 | + * +----------------+ + *[15..0]| retime-delay |------>[Retime Delay] + * +----------------+ + */ + +#define ST_PINCONF_UNPACK(conf, param)\ + ((conf >> ST_PINCONF_ ##param ##_SHIFT) \ + & ST_PINCONF_ ##param ##_MASK) + +#define ST_PINCONF_PACK(conf, val, param) (conf |=\ + ((val & ST_PINCONF_ ##param ##_MASK) << \ + ST_PINCONF_ ##param ##_SHIFT)) + +/* Output enable */ +#define ST_PINCONF_OE_MASK 0x1 +#define ST_PINCONF_OE_SHIFT 27 +#define ST_PINCONF_OE BIT(27) +#define ST_PINCONF_UNPACK_OE(conf) ST_PINCONF_UNPACK(conf, OE) +#define ST_PINCONF_PACK_OE(conf) ST_PINCONF_PACK(conf, 1, OE) + +/* Pull Up */ +#define ST_PINCONF_PU_MASK 0x1 +#define ST_PINCONF_PU_SHIFT 26 +#define ST_PINCONF_PU BIT(26) +#define ST_PINCONF_UNPACK_PU(conf) ST_PINCONF_UNPACK(conf, PU) +#define ST_PINCONF_PACK_PU(conf) ST_PINCONF_PACK(conf, 1, PU) + +/* Open Drain */ +#define ST_PINCONF_OD_MASK 0x1 +#define ST_PINCONF_OD_SHIFT 25 +#define ST_PINCONF_OD BIT(25) +#define ST_PINCONF_UNPACK_OD(conf) ST_PINCONF_UNPACK(conf, OD) +#define ST_PINCONF_PACK_OD(conf) ST_PINCONF_PACK(conf, 1, OD) + +#define ST_PINCONF_RT_MASK 0x1 +#define ST_PINCONF_RT_SHIFT 23 +#define ST_PINCONF_RT BIT(23) +#define ST_PINCONF_UNPACK_RT(conf) ST_PINCONF_UNPACK(conf, RT) +#define ST_PINCONF_PACK_RT(conf) ST_PINCONF_PACK(conf, 1, RT) + +#define ST_PINCONF_RT_INVERTCLK_MASK 0x1 +#define ST_PINCONF_RT_INVERTCLK_SHIFT 22 +#define ST_PINCONF_RT_INVERTCLK BIT(22) +#define ST_PINCONF_UNPACK_RT_INVERTCLK(conf) \ + ST_PINCONF_UNPACK(conf, RT_INVERTCLK) +#define ST_PINCONF_PACK_RT_INVERTCLK(conf) \ + ST_PINCONF_PACK(conf, 1, RT_INVERTCLK) + +#define ST_PINCONF_RT_CLKNOTDATA_MASK 0x1 +#define ST_PINCONF_RT_CLKNOTDATA_SHIFT 21 +#define ST_PINCONF_RT_CLKNOTDATA BIT(21) +#define ST_PINCONF_UNPACK_RT_CLKNOTDATA(conf) \ + ST_PINCONF_UNPACK(conf, RT_CLKNOTDATA) +#define ST_PINCONF_PACK_RT_CLKNOTDATA(conf) \ + ST_PINCONF_PACK(conf, 1, RT_CLKNOTDATA) + +#define ST_PINCONF_RT_DOUBLE_EDGE_MASK 0x1 +#define ST_PINCONF_RT_DOUBLE_EDGE_SHIFT 20 +#define ST_PINCONF_RT_DOUBLE_EDGE BIT(20) +#define ST_PINCONF_UNPACK_RT_DOUBLE_EDGE(conf) \ + ST_PINCONF_UNPACK(conf, RT_DOUBLE_EDGE) +#define ST_PINCONF_PACK_RT_DOUBLE_EDGE(conf) \ + ST_PINCONF_PACK(conf, 1, RT_DOUBLE_EDGE) + +#define ST_PINCONF_RT_CLK_MASK 0x3 +#define ST_PINCONF_RT_CLK_SHIFT 18 +#define ST_PINCONF_RT_CLK BIT(18) +#define ST_PINCONF_UNPACK_RT_CLK(conf) ST_PINCONF_UNPACK(conf, RT_CLK) +#define ST_PINCONF_PACK_RT_CLK(conf, val) ST_PINCONF_PACK(conf, val, RT_CLK) + +/* RETIME_DELAY in Pico Secs */ +#define ST_PINCONF_RT_DELAY_MASK 0xffff +#define ST_PINCONF_RT_DELAY_SHIFT 0 +#define ST_PINCONF_UNPACK_RT_DELAY(conf) ST_PINCONF_UNPACK(conf, RT_DELAY) +#define ST_PINCONF_PACK_RT_DELAY(conf, val) \ + ST_PINCONF_PACK(conf, val, RT_DELAY) + +#define ST_GPIO_PINS_PER_BANK (8) +#define OF_GPIO_ARGS_MIN (4) +#define OF_RT_ARGS_MIN (2) + +#define gpio_range_to_bank(chip) \ + container_of(chip, struct st_gpio_bank, range) + +#define gpio_chip_to_bank(chip) \ + container_of(chip, struct st_gpio_bank, gpio_chip) + + +enum st_retime_style { + st_retime_style_none, + st_retime_style_packed, + st_retime_style_dedicated, +}; + +struct st_retime_dedicated { + struct regmap_field *rt[ST_GPIO_PINS_PER_BANK]; +}; + +struct st_retime_packed { + struct regmap_field *clk1notclk0; + struct regmap_field *delay_0; + struct regmap_field *delay_1; + struct regmap_field *invertclk; + struct regmap_field *retime; + struct regmap_field *clknotdata; + struct regmap_field *double_edge; +}; + +struct st_pio_control { + u32 rt_pin_mask; + struct regmap_field *alt, *oe, *pu, *od; + /* retiming */ + union { + struct st_retime_packed rt_p; + struct st_retime_dedicated rt_d; + } rt; +}; + +struct st_pctl_data { + enum st_retime_style rt_style; + unsigned int *input_delays; + int ninput_delays; + unsigned int *output_delays; + int noutput_delays; + /* register offset information */ + int alt, oe, pu, od, rt; +}; + +struct st_pinconf { + int pin; + const char *name; + unsigned long config; + int altfunc; +}; + +struct st_pmx_func { + const char *name; + const char **groups; + unsigned ngroups; +}; + +struct st_pctl_group { + const char *name; + unsigned int *pins; + unsigned npins; + struct st_pinconf *pin_conf; +}; + +struct st_gpio_bank { + struct gpio_chip gpio_chip; + struct pinctrl_gpio_range range; + void __iomem *base; + struct st_pio_control pc; +}; + +struct st_pinctrl { + struct device *dev; + struct pinctrl_dev *pctl; + struct st_gpio_bank *banks; + int nbanks; + struct st_pmx_func *functions; + int nfunctions; + struct st_pctl_group *groups; + int ngroups; + struct regmap *regmap; + const struct st_pctl_data *data; +}; + +/* SOC specific data */ +/* STiH415 data */ +unsigned int stih415_input_delays[] = {0, 500, 1000, 1500}; +unsigned int stih415_output_delays[] = {0, 1000, 2000, 3000}; + +#define STIH415_PCTRL_COMMON_DATA \ + .rt_style = st_retime_style_packed, \ + .input_delays = stih415_input_delays, \ + .ninput_delays = 4, \ + .output_delays = stih415_output_delays, \ + .noutput_delays = 4 + +static const struct st_pctl_data stih415_sbc_data = { + STIH415_PCTRL_COMMON_DATA, + .alt = 0, .oe = 5, .pu = 7, .od = 9, .rt = 16, +}; + +static const struct st_pctl_data stih415_front_data = { + STIH415_PCTRL_COMMON_DATA, + .alt = 0, .oe = 8, .pu = 10, .od = 12, .rt = 16, +}; + +static const struct st_pctl_data stih415_rear_data = { + STIH415_PCTRL_COMMON_DATA, + .alt = 0, .oe = 6, .pu = 8, .od = 10, .rt = 38, +}; + +static const struct st_pctl_data stih415_left_data = { + STIH415_PCTRL_COMMON_DATA, + .alt = 0, .oe = 3, .pu = 4, .od = 5, .rt = 6, +}; + +static const struct st_pctl_data stih415_right_data = { + STIH415_PCTRL_COMMON_DATA, + .alt = 0, .oe = 5, .pu = 7, .od = 9, .rt = 11, +}; + +/* STiH416 data */ +unsigned int stih416_delays[] = {0, 300, 500, 750, 1000, 1250, 1500, + 1750, 2000, 2250, 2500, 2750, 3000, 3250 }; + +static const struct st_pctl_data stih416_data = { + .rt_style = st_retime_style_dedicated, + .input_delays = stih416_delays, + .ninput_delays = 14, + .output_delays = stih416_delays, + .noutput_delays = 14, + .alt = 0, .oe = 40, .pu = 50, .od = 60, .rt = 100, +}; + +/* Low level functions.. */ +static inline int st_gpio_bank(int gpio) +{ + return gpio/ST_GPIO_PINS_PER_BANK; +} + +static inline int st_gpio_pin(int gpio) +{ + return gpio%ST_GPIO_PINS_PER_BANK; +} + +static void st_pinconf_set_config(struct st_pio_control *pc, + int pin, unsigned long config) +{ + struct regmap_field *output_enable = pc->oe; + struct regmap_field *pull_up = pc->pu; + struct regmap_field *open_drain = pc->od; + unsigned int oe_value, pu_value, od_value; + unsigned long mask = BIT(pin); + + regmap_field_read(output_enable, &oe_value); + regmap_field_read(pull_up, &pu_value); + regmap_field_read(open_drain, &od_value); + + /* Clear old values */ + oe_value &= ~mask; + pu_value &= ~mask; + od_value &= ~mask; + + if (config & ST_PINCONF_OE) + oe_value |= mask; + if (config & ST_PINCONF_PU) + pu_value |= mask; + if (config & ST_PINCONF_OD) + od_value |= mask; + + regmap_field_write(output_enable, oe_value); + regmap_field_write(pull_up, pu_value); + regmap_field_write(open_drain, od_value); +} + +static void st_pctl_set_function(struct st_pio_control *pc, + int pin_id, int function) +{ + struct regmap_field *alt = pc->alt; + unsigned int val; + int pin = st_gpio_pin(pin_id); + int offset = pin * 4; + + regmap_field_read(alt, &val); + val &= ~(0xf << offset); + val |= function << offset; + regmap_field_write(alt, val); +} + +static unsigned long st_pinconf_delay_to_bit(unsigned int delay, + const struct st_pctl_data *data, unsigned long config) +{ + unsigned int *delay_times; + int num_delay_times, i, closest_index = -1; + unsigned int closest_divergence = UINT_MAX; + + if (ST_PINCONF_UNPACK_OE(config)) { + delay_times = data->output_delays; + num_delay_times = data->noutput_delays; + } else { + delay_times = data->input_delays; + num_delay_times = data->ninput_delays; + } + + for (i = 0; i < num_delay_times; i++) { + unsigned int divergence = abs(delay - delay_times[i]); + + if (divergence == 0) + return i; + + if (divergence < closest_divergence) { + closest_divergence = divergence; + closest_index = i; + } + } + + pr_warn("Attempt to set delay %d, closest available %d\n", + delay, delay_times[closest_index]); + + return closest_index; +} + +static unsigned long st_pinconf_bit_to_delay(unsigned int index, + const struct st_pctl_data *data, unsigned long output) +{ + unsigned int *delay_times; + int num_delay_times; + + if (output) { + delay_times = data->output_delays; + num_delay_times = data->noutput_delays; + } else { + delay_times = data->input_delays; + num_delay_times = data->ninput_delays; + } + + if (index < num_delay_times) { + return delay_times[index]; + } else { + pr_warn("Delay not found in/out delay list\n"); + return 0; + } +} + +static void st_regmap_field_bit_set_clear_pin(struct regmap_field *field, + int enable, int pin) +{ + unsigned int val = 0; + + regmap_field_read(field, &val); + if (enable) + val |= BIT(pin); + else + val &= ~BIT(pin); + regmap_field_write(field, val); +} + +static void st_pinconf_set_retime_packed(struct st_pinctrl *info, + struct st_pio_control *pc, unsigned long config, int pin) +{ + const struct st_pctl_data *data = info->data; + struct st_retime_packed *rt_p = &pc->rt.rt_p; + unsigned int delay; + + st_regmap_field_bit_set_clear_pin(rt_p->clk1notclk0, + ST_PINCONF_UNPACK_RT_CLK(config), pin); + + st_regmap_field_bit_set_clear_pin(rt_p->clknotdata, + ST_PINCONF_UNPACK_RT_CLKNOTDATA(config), pin); + + st_regmap_field_bit_set_clear_pin(rt_p->double_edge, + ST_PINCONF_UNPACK_RT_DOUBLE_EDGE(config), pin); + + st_regmap_field_bit_set_clear_pin(rt_p->invertclk, + ST_PINCONF_UNPACK_RT_INVERTCLK(config), pin); + + st_regmap_field_bit_set_clear_pin(rt_p->retime, + ST_PINCONF_UNPACK_RT(config), pin); + + delay = st_pinconf_delay_to_bit(ST_PINCONF_UNPACK_RT_DELAY(config), + data, config); + /* 2 bit delay, lsb */ + st_regmap_field_bit_set_clear_pin(rt_p->delay_0, delay & 0x1, pin); + /* 2 bit delay, msb */ + st_regmap_field_bit_set_clear_pin(rt_p->delay_1, delay & 0x2, pin); + +} + +static void st_pinconf_set_retime_dedicated(struct st_pinctrl *info, + struct st_pio_control *pc, unsigned long config, int pin) +{ + int input = ST_PINCONF_UNPACK_OE(config) ? 0 : 1; + int clk = ST_PINCONF_UNPACK_RT_CLK(config); + int clknotdata = ST_PINCONF_UNPACK_RT_CLKNOTDATA(config); + int double_edge = ST_PINCONF_UNPACK_RT_DOUBLE_EDGE(config); + int invertclk = ST_PINCONF_UNPACK_RT_INVERTCLK(config); + int retime = ST_PINCONF_UNPACK_RT(config); + + unsigned long delay = st_pinconf_delay_to_bit( + ST_PINCONF_UNPACK_RT_DELAY(config), + info->data, config); + struct st_retime_dedicated *rt_d = &pc->rt.rt_d; + + unsigned long retime_config = + ((clk) << RT_D_CFG_CLK_SHIFT) | + ((delay) << RT_D_CFG_DELAY_SHIFT) | + ((input) << RT_D_CFG_DELAY_INNOTOUT_SHIFT) | + ((retime) << RT_D_CFG_RETIME_SHIFT) | + ((clknotdata) << RT_D_CFG_CLKNOTDATA_SHIFT) | + ((invertclk) << RT_D_CFG_INVERTCLK_SHIFT) | + ((double_edge) << RT_D_CFG_DOUBLE_EDGE_SHIFT); + + regmap_field_write(rt_d->rt[pin], retime_config); +} + +static void st_pinconf_get_direction(struct st_pio_control *pc, + int pin, unsigned long *config) +{ + unsigned int oe_value, pu_value, od_value; + + regmap_field_read(pc->oe, &oe_value); + regmap_field_read(pc->pu, &pu_value); + regmap_field_read(pc->od, &od_value); + + if (oe_value & BIT(pin)) + ST_PINCONF_PACK_OE(*config); + if (pu_value & BIT(pin)) + ST_PINCONF_PACK_PU(*config); + if (od_value & BIT(pin)) + ST_PINCONF_PACK_OD(*config); + +} + +static int st_pinconf_get_retime_packed(struct st_pinctrl *info, + struct st_pio_control *pc, int pin, unsigned long *config) +{ + const struct st_pctl_data *data = info->data; + struct st_retime_packed *rt_p = &pc->rt.rt_p; + unsigned int delay_bits, delay, delay0, delay1, val; + int output = ST_PINCONF_UNPACK_OE(*config); + + if (!regmap_field_read(rt_p->retime, &val) && (val & BIT(pin))) + ST_PINCONF_PACK_RT(*config); + + if (!regmap_field_read(rt_p->clk1notclk0, &val) && (val & BIT(pin))) + ST_PINCONF_PACK_RT_CLK(*config, 1); + + if (!regmap_field_read(rt_p->clknotdata, &val) && (val & BIT(pin))) + ST_PINCONF_PACK_RT_CLKNOTDATA(*config); + + if (!regmap_field_read(rt_p->double_edge, &val) && (val & BIT(pin))) + ST_PINCONF_PACK_RT_DOUBLE_EDGE(*config); + + if (!regmap_field_read(rt_p->invertclk, &val) && (val & BIT(pin))) + ST_PINCONF_PACK_RT_INVERTCLK(*config); + + regmap_field_read(rt_p->delay_0, &delay0); + regmap_field_read(rt_p->delay_1, &delay1); + delay_bits = (((delay1 & BIT(pin)) ? 1 : 0) << 1) | + (((delay0 & BIT(pin)) ? 1 : 0)); + delay = st_pinconf_bit_to_delay(delay_bits, data, output); + ST_PINCONF_PACK_RT_DELAY(*config, delay); + + return 0; +} + +static int st_pinconf_get_retime_dedicated(struct st_pinctrl *info, + struct st_pio_control *pc, int pin, unsigned long *config) +{ + unsigned int value; + unsigned long delay_bits, delay, rt_clk; + int output = ST_PINCONF_UNPACK_OE(*config); + struct st_retime_dedicated *rt_d = &pc->rt.rt_d; + + regmap_field_read(rt_d->rt[pin], &value); + + rt_clk = (value & RT_D_CFG_CLK_MASK) >> RT_D_CFG_CLK_SHIFT; + ST_PINCONF_PACK_RT_CLK(*config, rt_clk); + + delay_bits = (value & RT_D_CFG_DELAY_MASK) >> RT_D_CFG_DELAY_SHIFT; + delay = st_pinconf_bit_to_delay(delay_bits, info->data, output); + ST_PINCONF_PACK_RT_DELAY(*config, delay); + + if (value & RT_D_CFG_CLKNOTDATA_MASK) + ST_PINCONF_PACK_RT_CLKNOTDATA(*config); + + if (value & RT_D_CFG_DOUBLE_EDGE_MASK) + ST_PINCONF_PACK_RT_DOUBLE_EDGE(*config); + + if (value & RT_D_CFG_INVERTCLK_MASK) + ST_PINCONF_PACK_RT_INVERTCLK(*config); + + if (value & RT_D_CFG_RETIME_MASK) + ST_PINCONF_PACK_RT(*config); + + return 0; +} + +/* GPIO related functions */ + +static inline void __st_gpio_set(struct st_gpio_bank *bank, + unsigned offset, int value) +{ + if (value) + writel(BIT(offset), bank->base + REG_PIO_SET_POUT); + else + writel(BIT(offset), bank->base + REG_PIO_CLR_POUT); +} + +static void st_gpio_direction(struct st_gpio_bank *bank, + unsigned int gpio, unsigned int direction) +{ + int offset = st_gpio_pin(gpio); + int i = 0; + /** + * There are three configuration registers (PIOn_PC0, PIOn_PC1 + * and PIOn_PC2) for each port. These are used to configure the + * PIO port pins. Each pin can be configured as an input, output, + * bidirectional, or alternative function pin. Three bits, one bit + * from each of the three registers, configure the corresponding bit of + * the port. Valid bit settings is: + * + * PC2 PC1 PC0 Direction. + * 0 0 0 [Input Weak pull-up] + * 0 0 or 1 1 [Bidirection] + * 0 1 0 [Output] + * 1 0 0 [Input] + * + * PIOn_SET_PC and PIOn_CLR_PC registers are used to set and clear bits + * individually. + */ + for (i = 0; i <= 2; i++) { + if (direction & BIT(i)) + writel(BIT(offset), bank->base + REG_PIO_SET_PC(i)); + else + writel(BIT(offset), bank->base + REG_PIO_CLR_PC(i)); + } +} + +static int st_gpio_request(struct gpio_chip *chip, unsigned offset) +{ + return pinctrl_request_gpio(chip->base + offset); +} + +static void st_gpio_free(struct gpio_chip *chip, unsigned offset) +{ + pinctrl_free_gpio(chip->base + offset); +} + +static int st_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct st_gpio_bank *bank = gpio_chip_to_bank(chip); + + return !!(readl(bank->base + REG_PIO_PIN) & BIT(offset)); +} + +static void st_gpio_set(struct gpio_chip *chip, unsigned offset, int value) +{ + struct st_gpio_bank *bank = gpio_chip_to_bank(chip); + __st_gpio_set(bank, offset, value); +} + +static int st_gpio_direction_input(struct gpio_chip *chip, unsigned offset) +{ + pinctrl_gpio_direction_input(chip->base + offset); + + return 0; +} + +static int st_gpio_direction_output(struct gpio_chip *chip, + unsigned offset, int value) +{ + struct st_gpio_bank *bank = gpio_chip_to_bank(chip); + + __st_gpio_set(bank, offset, value); + pinctrl_gpio_direction_output(chip->base + offset); + + return 0; +} + +static int st_gpio_xlate(struct gpio_chip *gc, + const struct of_phandle_args *gpiospec, u32 *flags) +{ + if (WARN_ON(gc->of_gpio_n_cells < 1)) + return -EINVAL; + + if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells)) + return -EINVAL; + + if (gpiospec->args[0] > gc->ngpio) + return -EINVAL; + + return gpiospec->args[0]; +} + +/* Pinctrl Groups */ +static int st_pctl_get_groups_count(struct pinctrl_dev *pctldev) +{ + struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + + return info->ngroups; +} + +static const char *st_pctl_get_group_name(struct pinctrl_dev *pctldev, + unsigned selector) +{ + struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + + return info->groups[selector].name; +} + +static int st_pctl_get_group_pins(struct pinctrl_dev *pctldev, + unsigned selector, const unsigned **pins, unsigned *npins) +{ + struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + + if (selector >= info->ngroups) + return -EINVAL; + + *pins = info->groups[selector].pins; + *npins = info->groups[selector].npins; + + return 0; +} + +static const inline struct st_pctl_group *st_pctl_find_group_by_name( + const struct st_pinctrl *info, const char *name) +{ + int i; + + for (i = 0; i < info->ngroups; i++) { + if (!strcmp(info->groups[i].name, name)) + return &info->groups[i]; + } + + return NULL; +} + +static int st_pctl_dt_node_to_map(struct pinctrl_dev *pctldev, + struct device_node *np, struct pinctrl_map **map, unsigned *num_maps) +{ + struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + const struct st_pctl_group *grp; + struct pinctrl_map *new_map; + struct device_node *parent; + int map_num, i; + + grp = st_pctl_find_group_by_name(info, np->name); + if (!grp) { + dev_err(info->dev, "unable to find group for node %s\n", + np->name); + return -EINVAL; + } + + map_num = grp->npins + 1; + new_map = devm_kzalloc(pctldev->dev, + sizeof(*new_map) * map_num, GFP_KERNEL); + if (!new_map) + return -ENOMEM; + + parent = of_get_parent(np); + if (!parent) { + devm_kfree(pctldev->dev, new_map); + return -EINVAL; + } + + *map = new_map; + *num_maps = map_num; + new_map[0].type = PIN_MAP_TYPE_MUX_GROUP; + new_map[0].data.mux.function = parent->name; + new_map[0].data.mux.group = np->name; + of_node_put(parent); + + /* create config map per pin */ + new_map++; + for (i = 0; i < grp->npins; i++) { + new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN; + new_map[i].data.configs.group_or_pin = + pin_get_name(pctldev, grp->pins[i]); + new_map[i].data.configs.configs = &grp->pin_conf[i].config; + new_map[i].data.configs.num_configs = 1; + } + dev_info(pctldev->dev, "maps: function %s group %s num %d\n", + (*map)->data.mux.function, grp->name, map_num); + + return 0; +} + +static void st_pctl_dt_free_map(struct pinctrl_dev *pctldev, + struct pinctrl_map *map, unsigned num_maps) +{ +} + +static struct pinctrl_ops st_pctlops = { + .get_groups_count = st_pctl_get_groups_count, + .get_group_pins = st_pctl_get_group_pins, + .get_group_name = st_pctl_get_group_name, + .dt_node_to_map = st_pctl_dt_node_to_map, + .dt_free_map = st_pctl_dt_free_map, +}; + +/* Pinmux */ +static int st_pmx_get_funcs_count(struct pinctrl_dev *pctldev) +{ + struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + + return info->nfunctions; +} + +const char *st_pmx_get_fname(struct pinctrl_dev *pctldev, + unsigned selector) +{ + struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + + return info->functions[selector].name; +} + +static int st_pmx_get_groups(struct pinctrl_dev *pctldev, + unsigned selector, const char * const **grps, unsigned * const ngrps) +{ + struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + *grps = info->functions[selector].groups; + *ngrps = info->functions[selector].ngroups; + + return 0; +} + +static struct st_pio_control *st_get_pio_control( + struct pinctrl_dev *pctldev, int pin) +{ + struct pinctrl_gpio_range *range = + pinctrl_find_gpio_range_from_pin(pctldev, pin); + struct st_gpio_bank *bank = gpio_range_to_bank(range); + + return &bank->pc; +} + +static int st_pmx_enable(struct pinctrl_dev *pctldev, unsigned fselector, + unsigned group) +{ + struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + struct st_pinconf *conf = info->groups[group].pin_conf; + struct st_pio_control *pc; + int i; + + for (i = 0; i < info->groups[group].npins; i++) { + pc = st_get_pio_control(pctldev, conf[i].pin); + st_pctl_set_function(pc, conf[i].pin, conf[i].altfunc); + } + + return 0; +} + +static void st_pmx_disable(struct pinctrl_dev *pctldev, unsigned selector, + unsigned group) +{ +} + +static int st_pmx_set_gpio_direction(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, unsigned gpio, + bool input) +{ + struct st_gpio_bank *bank = gpio_range_to_bank(range); + /* + * When a PIO bank is used in its primary function mode (altfunc = 0) + * Output Enable (OE), Open Drain(OD), and Pull Up (PU) + * for the primary PIO functions are driven by the related PIO block + */ + st_pctl_set_function(&bank->pc, gpio, 0); + st_gpio_direction(bank, gpio, input ? + ST_GPIO_DIRECTION_IN : ST_GPIO_DIRECTION_OUT); + + return 0; +} + +static struct pinmux_ops st_pmxops = { + .get_functions_count = st_pmx_get_funcs_count, + .get_function_name = st_pmx_get_fname, + .get_function_groups = st_pmx_get_groups, + .enable = st_pmx_enable, + .disable = st_pmx_disable, + .gpio_set_direction = st_pmx_set_gpio_direction, +}; + +/* Pinconf */ +static void st_pinconf_get_retime(struct st_pinctrl *info, + struct st_pio_control *pc, int pin, unsigned long *config) +{ + if (info->data->rt_style == st_retime_style_packed) + st_pinconf_get_retime_packed(info, pc, pin, config); + else if (info->data->rt_style == st_retime_style_dedicated) + if ((BIT(pin) & pc->rt_pin_mask)) + st_pinconf_get_retime_dedicated(info, pc, + pin, config); +} + +static void st_pinconf_set_retime(struct st_pinctrl *info, + struct st_pio_control *pc, int pin, unsigned long config) +{ + if (info->data->rt_style == st_retime_style_packed) + st_pinconf_set_retime_packed(info, pc, config, pin); + else if (info->data->rt_style == st_retime_style_dedicated) + if ((BIT(pin) & pc->rt_pin_mask)) + st_pinconf_set_retime_dedicated(info, pc, + config, pin); +} + +static int st_pinconf_set(struct pinctrl_dev *pctldev, + unsigned pin_id, unsigned long config) +{ + int pin = st_gpio_pin(pin_id); + struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + struct st_pio_control *pc = st_get_pio_control(pctldev, pin_id); + + st_pinconf_set_config(pc, pin, config); + st_pinconf_set_retime(info, pc, pin, config); + + return 0; +} + +static int st_pinconf_get(struct pinctrl_dev *pctldev, + unsigned pin_id, unsigned long *config) +{ + int pin = st_gpio_pin(pin_id); + struct st_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + struct st_pio_control *pc = st_get_pio_control(pctldev, pin_id); + + *config = 0; + st_pinconf_get_direction(pc, pin, config); + st_pinconf_get_retime(info, pc, pin, config); + + return 0; +} + +static void st_pinconf_dbg_show(struct pinctrl_dev *pctldev, + struct seq_file *s, unsigned pin_id) +{ + unsigned long config; + st_pinconf_get(pctldev, pin_id, &config); + + seq_printf(s, "[OE:%ld,PU:%ld,OD:%ld]\n" + "\t\t[retime:%ld,invclk:%ld,clknotdat:%ld," + "de:%ld,rt-clk:%ld,rt-delay:%ld]", + ST_PINCONF_UNPACK_OE(config), + ST_PINCONF_UNPACK_PU(config), + ST_PINCONF_UNPACK_OD(config), + ST_PINCONF_UNPACK_RT(config), + ST_PINCONF_UNPACK_RT_INVERTCLK(config), + ST_PINCONF_UNPACK_RT_CLKNOTDATA(config), + ST_PINCONF_UNPACK_RT_DOUBLE_EDGE(config), + ST_PINCONF_UNPACK_RT_CLK(config), + ST_PINCONF_UNPACK_RT_DELAY(config)); +} + +static struct pinconf_ops st_confops = { + .pin_config_get = st_pinconf_get, + .pin_config_set = st_pinconf_set, + .pin_config_dbg_show = st_pinconf_dbg_show, +}; + +static void st_pctl_dt_child_count(struct st_pinctrl *info, + struct device_node *np) +{ + struct device_node *child; + for_each_child_of_node(np, child) { + if (of_property_read_bool(child, "gpio-controller")) { + info->nbanks++; + } else { + info->nfunctions++; + info->ngroups += of_get_child_count(child); + } + } +} + +static int st_pctl_dt_setup_retime_packed(struct st_pinctrl *info, + int bank, struct st_pio_control *pc) +{ + struct device *dev = info->dev; + struct regmap *rm = info->regmap; + const struct st_pctl_data *data = info->data; + /* 2 registers per bank */ + int reg = (data->rt + bank * RT_P_CFGS_PER_BANK) * 4; + struct st_retime_packed *rt_p = &pc->rt.rt_p; + /* cfg0 */ + struct reg_field clk1notclk0 = RT_P_CFG0_CLK1NOTCLK0_FIELD(reg); + struct reg_field delay_0 = RT_P_CFG0_DELAY_0_FIELD(reg); + struct reg_field delay_1 = RT_P_CFG0_DELAY_1_FIELD(reg); + /* cfg1 */ + struct reg_field invertclk = RT_P_CFG1_INVERTCLK_FIELD(reg + 4); + struct reg_field retime = RT_P_CFG1_RETIME_FIELD(reg + 4); + struct reg_field clknotdata = RT_P_CFG1_CLKNOTDATA_FIELD(reg + 4); + struct reg_field double_edge = RT_P_CFG1_DOUBLE_EDGE_FIELD(reg + 4); + + rt_p->clk1notclk0 = devm_regmap_field_alloc(dev, rm, clk1notclk0); + rt_p->delay_0 = devm_regmap_field_alloc(dev, rm, delay_0); + rt_p->delay_1 = devm_regmap_field_alloc(dev, rm, delay_1); + rt_p->invertclk = devm_regmap_field_alloc(dev, rm, invertclk); + rt_p->retime = devm_regmap_field_alloc(dev, rm, retime); + rt_p->clknotdata = devm_regmap_field_alloc(dev, rm, clknotdata); + rt_p->double_edge = devm_regmap_field_alloc(dev, rm, double_edge); + + if (IS_ERR(rt_p->clk1notclk0) || IS_ERR(rt_p->delay_0) || + IS_ERR(rt_p->delay_1) || IS_ERR(rt_p->invertclk) || + IS_ERR(rt_p->retime) || IS_ERR(rt_p->clknotdata) || + IS_ERR(rt_p->double_edge)) + return -EINVAL; + + return 0; +} + +static int st_pctl_dt_setup_retime_dedicated(struct st_pinctrl *info, + int bank, struct st_pio_control *pc) +{ + struct device *dev = info->dev; + struct regmap *rm = info->regmap; + const struct st_pctl_data *data = info->data; + /* 8 registers per bank */ + int reg_offset = (data->rt + bank * RT_D_CFGS_PER_BANK) * 4; + struct st_retime_dedicated *rt_d = &pc->rt.rt_d; + unsigned int j; + u32 pin_mask = pc->rt_pin_mask; + + for (j = 0; j < RT_D_CFGS_PER_BANK; j++) { + if (BIT(j) & pin_mask) { + struct reg_field reg = REG_FIELD(reg_offset, 0, 31); + rt_d->rt[j] = devm_regmap_field_alloc(dev, rm, reg); + if (IS_ERR(rt_d->rt[j])) + return -EINVAL; + reg_offset += 4; + } + } + return 0; +} + +static int st_pctl_dt_setup_retime(struct st_pinctrl *info, + int bank, struct st_pio_control *pc) +{ + const struct st_pctl_data *data = info->data; + if (data->rt_style == st_retime_style_packed) + return st_pctl_dt_setup_retime_packed(info, bank, pc); + else if (data->rt_style == st_retime_style_dedicated) + return st_pctl_dt_setup_retime_dedicated(info, bank, pc); + + return -EINVAL; +} + +static int st_parse_syscfgs(struct st_pinctrl *info, + int bank, struct device_node *np) +{ + const struct st_pctl_data *data = info->data; + /** + * For a given shared register like OE/PU/OD, there are 8 bits per bank + * 0:7 belongs to bank0, 8:15 belongs to bank1 ... + * So each register is shared across 4 banks. + */ + int lsb = (bank%4) * ST_GPIO_PINS_PER_BANK; + int msb = lsb + ST_GPIO_PINS_PER_BANK - 1; + struct reg_field alt_reg = REG_FIELD((data->alt + bank) * 4, 0, 31); + struct reg_field oe_reg = REG_FIELD((data->oe + bank/4) * 4, lsb, msb); + struct reg_field pu_reg = REG_FIELD((data->pu + bank/4) * 4, lsb, msb); + struct reg_field od_reg = REG_FIELD((data->od + bank/4) * 4, lsb, msb); + struct st_pio_control *pc = &info->banks[bank].pc; + struct device *dev = info->dev; + struct regmap *regmap = info->regmap; + + pc->alt = devm_regmap_field_alloc(dev, regmap, alt_reg); + pc->oe = devm_regmap_field_alloc(dev, regmap, oe_reg); + pc->pu = devm_regmap_field_alloc(dev, regmap, pu_reg); + pc->od = devm_regmap_field_alloc(dev, regmap, od_reg); + + if (IS_ERR(pc->alt) || IS_ERR(pc->oe) || + IS_ERR(pc->pu) || IS_ERR(pc->od)) + return -EINVAL; + + /* retime avaiable for all pins by default */ + pc->rt_pin_mask = 0xff; + of_property_read_u32(np, "st,retime-pin-mask", &pc->rt_pin_mask); + st_pctl_dt_setup_retime(info, bank, pc); + + return 0; +} + +/* + * Each pin is represented in of the below forms. + * <bank offset mux direction rt_type rt_delay rt_clk> + */ +static int st_pctl_dt_parse_groups(struct device_node *np, + struct st_pctl_group *grp, struct st_pinctrl *info, int idx) +{ + /* bank pad direction val altfunction */ + const __be32 *list; + struct property *pp; + struct st_pinconf *conf; + phandle phandle; + struct device_node *pins; + u32 pin; + int i = 0, npins = 0, nr_props; + + pins = of_get_child_by_name(np, "st,pins"); + if (!pins) + return -ENODATA; + + for_each_property_of_node(pins, pp) { + /* Skip those we do not want to proceed */ + if (!strcmp(pp->name, "name")) + continue; + + if (pp && (pp->length/sizeof(__be32)) >= OF_GPIO_ARGS_MIN) { + npins++; + } else { + pr_warn("Invalid st,pins in %s node\n", np->name); + return -EINVAL; + } + } + + grp->npins = npins; + grp->name = np->name; + grp->pins = devm_kzalloc(info->dev, npins * sizeof(u32), GFP_KERNEL); + grp->pin_conf = devm_kzalloc(info->dev, + npins * sizeof(*conf), GFP_KERNEL); + + if (!grp->pins || !grp->pin_conf) + return -ENOMEM; + + /* <bank offset mux direction rt_type rt_delay rt_clk> */ + for_each_property_of_node(pins, pp) { + if (!strcmp(pp->name, "name")) + continue; + nr_props = pp->length/sizeof(u32); + list = pp->value; + conf = &grp->pin_conf[i]; + + /* bank & offset */ + phandle = be32_to_cpup(list++); + pin = be32_to_cpup(list++); + conf->pin = of_get_named_gpio(pins, pp->name, 0); + conf->name = pp->name; + grp->pins[i] = conf->pin; + /* mux */ + conf->altfunc = be32_to_cpup(list++); + conf->config = 0; + /* direction */ + conf->config |= be32_to_cpup(list++); + /* rt_type rt_delay rt_clk */ + if (nr_props >= OF_GPIO_ARGS_MIN + OF_RT_ARGS_MIN) { + /* rt_type */ + conf->config |= be32_to_cpup(list++); + /* rt_delay */ + conf->config |= be32_to_cpup(list++); + /* rt_clk */ + if (nr_props > OF_GPIO_ARGS_MIN + OF_RT_ARGS_MIN) + conf->config |= be32_to_cpup(list++); + } + i++; + } + of_node_put(pins); + + return 0; +} + +static int st_pctl_parse_functions(struct device_node *np, + struct st_pinctrl *info, u32 index, int *grp_index) +{ + struct device_node *child; + struct st_pmx_func *func; + struct st_pctl_group *grp; + int ret, i; + + func = &info->functions[index]; + func->name = np->name; + func->ngroups = of_get_child_count(np); + if (func->ngroups <= 0) { + dev_err(info->dev, "No groups defined\n"); + return -EINVAL; + } + func->groups = devm_kzalloc(info->dev, + func->ngroups * sizeof(char *), GFP_KERNEL); + if (!func->groups) + return -ENOMEM; + + i = 0; + for_each_child_of_node(np, child) { + func->groups[i] = child->name; + grp = &info->groups[*grp_index]; + *grp_index += 1; + ret = st_pctl_dt_parse_groups(child, grp, info, i++); + if (ret) + return ret; + } + dev_info(info->dev, "Function[%d\t name:%s,\tgroups:%d]\n", + index, func->name, func->ngroups); + + return 0; +} + +static struct gpio_chip st_gpio_template = { + .request = st_gpio_request, + .free = st_gpio_free, + .get = st_gpio_get, + .set = st_gpio_set, + .direction_input = st_gpio_direction_input, + .direction_output = st_gpio_direction_output, + .ngpio = ST_GPIO_PINS_PER_BANK, + .of_gpio_n_cells = 1, + .of_xlate = st_gpio_xlate, +}; + +static int st_gpiolib_register_bank(struct st_pinctrl *info, + int bank_nr, struct device_node *np) +{ + struct st_gpio_bank *bank = &info->banks[bank_nr]; + struct pinctrl_gpio_range *range = &bank->range; + struct device *dev = info->dev; + int bank_num = of_alias_get_id(np, "gpio"); + struct resource res; + int err; + + if (of_address_to_resource(np, 0, &res)) + return -ENODEV; + + bank->base = devm_request_and_ioremap(dev, &res); + if (!bank->base) { + dev_err(dev, "Can't get IO memory mapping!\n"); + return -ENODEV; + } + + bank->gpio_chip = st_gpio_template; + bank->gpio_chip.base = bank_num * ST_GPIO_PINS_PER_BANK; + bank->gpio_chip.ngpio = ST_GPIO_PINS_PER_BANK; + bank->gpio_chip.of_node = np; + + of_property_read_string(np, "st,bank-name", &range->name); + bank->gpio_chip.label = range->name; + + range->id = bank_num; + range->pin_base = range->base = range->id * ST_GPIO_PINS_PER_BANK; + range->npins = bank->gpio_chip.ngpio; + range->gc = &bank->gpio_chip; + err = gpiochip_add(&bank->gpio_chip); + if (err) { + dev_err(dev, "Failed to add gpiochip(%d)!\n", bank_num); + return err; + } + dev_info(dev, "%s bank added.\n", range->name); + + return 0; +} + +static struct of_device_id st_pctl_of_match[] = { + { .compatible = "st,stih415-sbc-pinctrl", .data = &stih415_sbc_data }, + { .compatible = "st,stih415-rear-pinctrl", .data = &stih415_rear_data }, + { .compatible = "st,stih415-left-pinctrl", .data = &stih415_left_data }, + { .compatible = "st,stih415-right-pinctrl", + .data = &stih415_right_data }, + { .compatible = "st,stih415-front-pinctrl", + .data = &stih415_front_data }, + { .compatible = "st,stih416-sbc-pinctrl", .data = &stih416_data}, + { .compatible = "st,stih416-front-pinctrl", .data = &stih416_data}, + { .compatible = "st,stih416-rear-pinctrl", .data = &stih416_data}, + { .compatible = "st,stih416-fvdp-fe-pinctrl", .data = &stih416_data}, + { .compatible = "st,stih416-fvdp-lite-pinctrl", .data = &stih416_data}, + { /* sentinel */ } +}; + +static int st_pctl_probe_dt(struct platform_device *pdev, + struct pinctrl_desc *pctl_desc, struct st_pinctrl *info) +{ + int ret = 0; + int i = 0, j = 0, k = 0, bank; + struct pinctrl_pin_desc *pdesc; + struct device_node *np = pdev->dev.of_node; + struct device_node *child; + int grp_index = 0; + + st_pctl_dt_child_count(info, np); + if (!info->nbanks) { + dev_err(&pdev->dev, "you need atleast one gpio bank\n"); + return -EINVAL; + } + + dev_info(&pdev->dev, "nbanks = %d\n", info->nbanks); + dev_info(&pdev->dev, "nfunctions = %d\n", info->nfunctions); + dev_info(&pdev->dev, "ngroups = %d\n", info->ngroups); + + info->functions = devm_kzalloc(&pdev->dev, + info->nfunctions * sizeof(*info->functions), GFP_KERNEL); + + info->groups = devm_kzalloc(&pdev->dev, + info->ngroups * sizeof(*info->groups) , GFP_KERNEL); + + info->banks = devm_kzalloc(&pdev->dev, + info->nbanks * sizeof(*info->banks), GFP_KERNEL); + + if (!info->functions || !info->groups || !info->banks) + return -ENOMEM; + + info->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscfg"); + if (IS_ERR(info->regmap)) { + dev_err(info->dev, "No syscfg phandle specified\n"); + return PTR_ERR(info->regmap); + } + info->data = of_match_node(st_pctl_of_match, np)->data; + + pctl_desc->npins = info->nbanks * ST_GPIO_PINS_PER_BANK; + pdesc = devm_kzalloc(&pdev->dev, + sizeof(*pdesc) * pctl_desc->npins, GFP_KERNEL); + if (!pdesc) + return -ENOMEM; + + pctl_desc->pins = pdesc; + + bank = 0; + for_each_child_of_node(np, child) { + if (of_property_read_bool(child, "gpio-controller")) { + const char *bank_name = NULL; + ret = st_gpiolib_register_bank(info, bank, child); + if (ret) + return ret; + + k = info->banks[bank].range.pin_base; + bank_name = info->banks[bank].range.name; + for (j = 0; j < ST_GPIO_PINS_PER_BANK; j++, k++) { + pdesc->number = k; + pdesc->name = kasprintf(GFP_KERNEL, "%s[%d]", + bank_name, j); + pdesc++; + } + st_parse_syscfgs(info, bank, child); + bank++; + } else { + ret = st_pctl_parse_functions(child, info, + i++, &grp_index); + if (ret) { + dev_err(&pdev->dev, "No functions found.\n"); + return ret; + } + } + } + + return 0; +} + +static int st_pctl_probe(struct platform_device *pdev) +{ + struct st_pinctrl *info; + struct pinctrl_desc *pctl_desc; + int ret, i; + + if (!pdev->dev.of_node) { + dev_err(&pdev->dev, "device node not found.\n"); + return -EINVAL; + } + + pctl_desc = devm_kzalloc(&pdev->dev, sizeof(*pctl_desc), GFP_KERNEL); + if (!pctl_desc) + return -ENOMEM; + + info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->dev = &pdev->dev; + platform_set_drvdata(pdev, info); + ret = st_pctl_probe_dt(pdev, pctl_desc, info); + if (ret) + return ret; + + pctl_desc->owner = THIS_MODULE, + pctl_desc->pctlops = &st_pctlops, + pctl_desc->pmxops = &st_pmxops, + pctl_desc->confops = &st_confops, + pctl_desc->name = dev_name(&pdev->dev); + + info->pctl = pinctrl_register(pctl_desc, &pdev->dev, info); + if (!info->pctl) { + dev_err(&pdev->dev, "Failed pinctrl registration\n"); + return -EINVAL; + } + + for (i = 0; i < info->nbanks; i++) + pinctrl_add_gpio_range(info->pctl, &info->banks[i].range); + + return 0; +} + +static struct platform_driver st_pctl_driver = { + .driver = { + .name = "st-pinctrl", + .owner = THIS_MODULE, + .of_match_table = st_pctl_of_match, + }, + .probe = st_pctl_probe, +}; + +static int __init st_pctl_init(void) +{ + return platform_driver_register(&st_pctl_driver); +} +arch_initcall(st_pctl_init); diff --git a/include/linux/regmap.h b/include/linux/regmap.h index d6f3221e29d4..75981d0b57dc 100644 --- a/include/linux/regmap.h +++ b/include/linux/regmap.h @@ -23,6 +23,7 @@ struct irq_domain; struct spi_device; struct regmap; struct regmap_range_cfg; +struct regmap_field; /* An enum of all the supported cache types */ enum regcache_type { @@ -417,6 +418,36 @@ bool regmap_reg_in_ranges(unsigned int reg, unsigned int nranges); /** + * Description of an register field + * + * @reg: Offset of the register within the regmap bank + * @lsb: lsb of the register field. + * @reg: msb of the register field. + */ +struct reg_field { + unsigned int reg; + unsigned int lsb; + unsigned int msb; +}; + +#define REG_FIELD(_reg, _lsb, _msb) { \ + .reg = _reg, \ + .lsb = _lsb, \ + .msb = _msb, \ + } + +struct regmap_field *regmap_field_alloc(struct regmap *regmap, + struct reg_field reg_field); +void regmap_field_free(struct regmap_field *field); + +struct regmap_field *devm_regmap_field_alloc(struct device *dev, + struct regmap *regmap, struct reg_field reg_field); +void devm_regmap_field_free(struct device *dev, struct regmap_field *field); + +int regmap_field_read(struct regmap_field *field, unsigned int *val); +int regmap_field_write(struct regmap_field *field, unsigned int val); + +/** * Description of an IRQ for the generic regmap irq_chip. * * @reg_offset: Offset of the status/mask register within the bank |