diff options
Diffstat (limited to 'drivers/pinctrl/sunplus/sppctl.c')
| -rw-r--r-- | drivers/pinctrl/sunplus/sppctl.c | 1132 |
1 files changed, 1132 insertions, 0 deletions
diff --git a/drivers/pinctrl/sunplus/sppctl.c b/drivers/pinctrl/sunplus/sppctl.c new file mode 100644 index 000000000..6b24fa0e6 --- /dev/null +++ b/drivers/pinctrl/sunplus/sppctl.c @@ -0,0 +1,1132 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * SP7021 Pin Controller Driver. + * Copyright (C) Sunplus Tech / Tibbo Tech. + */ + +#include <linux/bitfield.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/gpio/driver.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/overflow.h> +#include <linux/platform_device.h> +#include <linux/seq_file.h> +#include <linux/slab.h> + +#include <linux/pinctrl/pinconf.h> +#include <linux/pinctrl/pinconf-generic.h> +#include <linux/pinctrl/pinmux.h> + +#include <dt-bindings/pinctrl/sppctl-sp7021.h> + +#include "../core.h" +#include "../pinctrl-utils.h" + +#include "sppctl.h" + +struct sppctl_gpio_chip { + void __iomem *gpioxt_base; /* MASTER, OE, OUT, IN, I_INV, O_INV, OD */ + void __iomem *first_base; /* GPIO_FIRST */ + + struct gpio_chip chip; + spinlock_t lock; /* lock for accessing OE register */ +}; + +static inline u32 sppctl_first_readl(struct sppctl_gpio_chip *spp_gchip, u32 off) +{ + return readl(spp_gchip->first_base + SPPCTL_GPIO_OFF_FIRST + off); +} + +static inline void sppctl_first_writel(struct sppctl_gpio_chip *spp_gchip, u32 val, u32 off) +{ + writel(val, spp_gchip->first_base + SPPCTL_GPIO_OFF_FIRST + off); +} + +static inline u32 sppctl_gpio_master_readl(struct sppctl_gpio_chip *spp_gchip, u32 off) +{ + return readl(spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_MASTER + off); +} + +static inline void sppctl_gpio_master_writel(struct sppctl_gpio_chip *spp_gchip, u32 val, + u32 off) +{ + writel(val, spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_MASTER + off); +} + +static inline u32 sppctl_gpio_oe_readl(struct sppctl_gpio_chip *spp_gchip, u32 off) +{ + return readl(spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OE + off); +} + +static inline void sppctl_gpio_oe_writel(struct sppctl_gpio_chip *spp_gchip, u32 val, u32 off) +{ + writel(val, spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OE + off); +} + +static inline void sppctl_gpio_out_writel(struct sppctl_gpio_chip *spp_gchip, u32 val, u32 off) +{ + writel(val, spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OUT + off); +} + +static inline u32 sppctl_gpio_in_readl(struct sppctl_gpio_chip *spp_gchip, u32 off) +{ + return readl(spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_IN + off); +} + +static inline u32 sppctl_gpio_iinv_readl(struct sppctl_gpio_chip *spp_gchip, u32 off) +{ + return readl(spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_IINV + off); +} + +static inline void sppctl_gpio_iinv_writel(struct sppctl_gpio_chip *spp_gchip, u32 val, + u32 off) +{ + writel(val, spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_IINV + off); +} + +static inline u32 sppctl_gpio_oinv_readl(struct sppctl_gpio_chip *spp_gchip, u32 off) +{ + return readl(spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OINV + off); +} + +static inline void sppctl_gpio_oinv_writel(struct sppctl_gpio_chip *spp_gchip, u32 val, + u32 off) +{ + writel(val, spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OINV + off); +} + +static inline u32 sppctl_gpio_od_readl(struct sppctl_gpio_chip *spp_gchip, u32 off) +{ + return readl(spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OD + off); +} + +static inline void sppctl_gpio_od_writel(struct sppctl_gpio_chip *spp_gchip, u32 val, u32 off) +{ + writel(val, spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OD + off); +} + +static inline u32 sppctl_get_reg_and_bit_offset(unsigned int offset, u32 *reg_off) +{ + u32 bit_off; + + /* Each register has 32 bits. */ + *reg_off = (offset / 32) * 4; + bit_off = offset % 32; + + return bit_off; +} + +static inline u32 sppctl_get_moon_reg_and_bit_offset(unsigned int offset, u32 *reg_off) +{ + u32 bit_off; + + /* + * Each MOON register has 32 bits. Upper 16-bit word are mask-fields. + * The lower 16-bit word are the control-fields. The corresponding + * bits in mask-field should be set then you can write something to + * control-field. + */ + *reg_off = (offset / 16) * 4; + bit_off = offset % 16; + + return bit_off; +} + +static inline u32 sppctl_prep_moon_reg_and_offset(unsigned int offset, u32 *reg_off, int val) +{ + u32 bit_off; + + bit_off = sppctl_get_moon_reg_and_bit_offset(offset, reg_off); + if (val) + return SPPCTL_SET_MOON_REG_BIT(bit_off); + else + return SPPCTL_CLR_MOON_REG_BIT(bit_off); +} + +/** + * sppctl_func_set() - Set pin of fully-pinmux function. + * + * Mask-fields and control-fields of fully-pinmux function of SP7021 are + * arranged as shown below: + * + * func# | register | mask-field | control-field + * -------+----------+--------------+--------------- + * 0 | base[0] | (22 : 16) | ( 6 : 0) + * 1 | base[0] | (30 : 24) | (14 : 8) + * 2 | base[1] | (22 : 16) | ( 6 : 0) + * 3 | baeg[1] | (30 : 24) | (14 : 8) + * : | : | : | : + * + * where mask-fields are used to protect control-fields from write-in + * accidentally. Set the corresponding bits in the mask-field before + * you write a value into a control-field. + * + * Control-fields are used to set where the function pin is going to + * be routed to. + * + * Note that mask-fields and control-fields of even number of 'func' + * are located at bits (22:16) and (6:0), while odd number of 'func's + * are located at bits (30:24) and (14:8). + */ +static void sppctl_func_set(struct sppctl_pdata *pctl, u8 func, u8 val) +{ + u32 reg, offset; + + /* + * Note that upper 16-bit word are mask-fields and lower 16-bit + * word are the control-fields. Set corresponding bits in mask- + * field before write to a control-field. + */ + reg = SPPCTL_FULLY_PINMUX_MASK_MASK | val; + + /* + * MUXF_L2SW_CLK_OUT is the first fully-pinmux pin + * and its register offset is 0. + */ + func -= MUXF_L2SW_CLK_OUT; + + /* + * Check if 'func' is an odd number or not. Mask and control- + * fields of odd number 'func' is located at upper portion of + * a register. Extra shift is needed. + */ + if (func & BIT(0)) + reg <<= SPPCTL_FULLY_PINMUX_UPPER_SHIFT; + + /* Convert func# to register offset w.r.t. base register. */ + offset = func * 2; + offset &= GENMASK(31, 2); + + writel(reg, pctl->moon2_base + offset); +} + +/** + * sppctl_gmx_set() - Set pin of group-pinmux. + * + * Mask-fields and control-fields of group-pinmux function of SP7021 are + * arranged as shown below: + * + * register | mask-fields | control-fields + * ----------+--------------+---------------- + * base[0] | (31 : 16) | (15 : 0) + * base[1] | (31 : 24) | (15 : 0) + * base[2] | (31 : 24) | (15 : 0) + * : | : | : + * + * where mask-fields are used to protect control-fields from write-in + * accidentally. Set the corresponding bits in the mask-field before + * you write a value into a control-field. + * + * Control-fields are used to set where the function pin is going to + * be routed to. A control-field consists of one or more bits. + */ +static void sppctl_gmx_set(struct sppctl_pdata *pctl, u8 reg_off, u8 bit_off, u8 bit_sz, + u8 val) +{ + u32 mask, reg; + + /* + * Note that upper 16-bit word are mask-fields and lower 16-bit + * word are the control-fields. Set corresponding bits in mask- + * field before write to a control-field. + */ + mask = GENMASK(bit_sz - 1, 0) << SPPCTL_MOON_REG_MASK_SHIFT; + reg = (mask | val) << bit_off; + + writel(reg, pctl->moon1_base + reg_off * 4); +} + +/** + * sppctl_first_get() - get bit of FIRST register. + * + * There are 4 FIRST registers. Each has 32 control-bits. + * Totally, there are 4 * 32 = 128 control-bits. + * Control-bits are arranged as shown below: + * + * registers | control-bits + * -----------+-------------- + * first[0] | (31 : 0) + * first[1] | (63 : 32) + * first[2] | (95 : 64) + * first[3] | (127 : 96) + * + * Each control-bit sets type of a GPIO pin. + * 0: a fully-pinmux pin + * 1: a GPIO or IOP pin + */ +static int sppctl_first_get(struct gpio_chip *chip, unsigned int offset) +{ + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + u32 reg_off, bit_off, reg; + + bit_off = sppctl_get_reg_and_bit_offset(offset, ®_off); + reg = sppctl_first_readl(spp_gchip, reg_off); + + return (reg & BIT(bit_off)) ? 1 : 0; +} + +/** + * sppctl_master_get() - get bit of MASTER register. + * + * There are 8 MASTER registers. Each has 16 mask-bits and 16 control-bits. + * Upper 16-bit of MASTER registers are mask-bits while lower 16-bit are + * control-bits. Totally, there are 128 mask-bits and 128 control-bits. + * They are arranged as shown below: + * + * register | mask-bits | control-bits + * -----------+-------------+-------------- + * master[0] | (15 : 0) | (15 : 0) + * master[1] | (31 : 16) | (31 : 16) + * master[2] | (47 : 32) | (47 : 32) + * : | : | : + * master[7] | (127 : 112) | (127 : 112) + * + * where mask-bits are used to protect control-bits from write-in + * accidentally. Set the corresponding mask-bit before you write + * a value into a control-bit. + * + * Each control-bit sets type of a GPIO pin when FIRST bit is 1. + * 0: a IOP pin + * 1: a GPIO pin + */ +static int sppctl_master_get(struct gpio_chip *chip, unsigned int offset) +{ + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + u32 reg_off, bit_off, reg; + + bit_off = sppctl_get_moon_reg_and_bit_offset(offset, ®_off); + reg = sppctl_gpio_master_readl(spp_gchip, reg_off); + return (reg & BIT(bit_off)) ? 1 : 0; +} + +static void sppctl_first_master_set(struct gpio_chip *chip, unsigned int offset, + enum mux_first_reg first, enum mux_master_reg master) +{ + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + u32 reg_off, bit_off, reg; + enum mux_first_reg val; + + /* FIRST register */ + if (first != mux_f_keep) { + bit_off = sppctl_get_reg_and_bit_offset(offset, ®_off); + reg = sppctl_first_readl(spp_gchip, reg_off); + val = (reg & BIT(bit_off)) ? mux_f_gpio : mux_f_mux; + + if (first != val) + switch (first) { + case mux_f_gpio: + reg |= BIT(bit_off); + sppctl_first_writel(spp_gchip, reg, reg_off); + break; + + case mux_f_mux: + reg &= ~BIT(bit_off); + sppctl_first_writel(spp_gchip, reg, reg_off); + break; + + case mux_f_keep: + break; + } + } + + /* MASTER register */ + if (master != mux_m_keep) { + reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, (master == mux_m_gpio)); + sppctl_gpio_master_writel(spp_gchip, reg, reg_off); + } +} + +static void sppctl_gpio_input_inv_set(struct gpio_chip *chip, unsigned int offset) +{ + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + u32 reg_off, reg; + + reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, 1); + sppctl_gpio_iinv_writel(spp_gchip, reg, reg_off); +} + +static void sppctl_gpio_output_inv_set(struct gpio_chip *chip, unsigned int offset) +{ + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + u32 reg_off, reg; + + reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, 1); + sppctl_gpio_oinv_writel(spp_gchip, reg, reg_off); +} + +static int sppctl_gpio_output_od_get(struct gpio_chip *chip, unsigned int offset) +{ + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + u32 reg_off, bit_off, reg; + + bit_off = sppctl_get_moon_reg_and_bit_offset(offset, ®_off); + reg = sppctl_gpio_od_readl(spp_gchip, reg_off); + + return (reg & BIT(bit_off)) ? 1 : 0; +} + +static void sppctl_gpio_output_od_set(struct gpio_chip *chip, unsigned int offset, + unsigned int val) +{ + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + u32 reg_off, reg; + + reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, val); + sppctl_gpio_od_writel(spp_gchip, reg, reg_off); +} + +static int sppctl_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) +{ + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + u32 reg_off, bit_off, reg; + + bit_off = sppctl_get_moon_reg_and_bit_offset(offset, ®_off); + reg = sppctl_gpio_oe_readl(spp_gchip, reg_off); + + return (reg & BIT(bit_off)) ? 0 : 1; +} + +static int sppctl_gpio_inv_get(struct gpio_chip *chip, unsigned int offset) +{ + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + u32 reg_off, bit_off, reg; + unsigned long flags; + + bit_off = sppctl_get_moon_reg_and_bit_offset(offset, ®_off); + + spin_lock_irqsave(&spp_gchip->lock, flags); + + if (sppctl_gpio_get_direction(chip, offset)) + reg = sppctl_gpio_iinv_readl(spp_gchip, reg_off); + else + reg = sppctl_gpio_oinv_readl(spp_gchip, reg_off); + + spin_unlock_irqrestore(&spp_gchip->lock, flags); + + return (reg & BIT(bit_off)) ? 1 : 0; +} + +static int sppctl_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) +{ + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + unsigned long flags; + u32 reg_off, reg; + + reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, 0); + + spin_lock_irqsave(&spp_gchip->lock, flags); + + sppctl_gpio_oe_writel(spp_gchip, reg, reg_off); + + spin_unlock_irqrestore(&spp_gchip->lock, flags); + return 0; +} + +static int sppctl_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, int val) +{ + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + unsigned long flags; + u32 reg_off, reg; + + reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, 1); + + spin_lock_irqsave(&spp_gchip->lock, flags); + + sppctl_gpio_oe_writel(spp_gchip, reg, reg_off); + + if (val < 0) { + spin_unlock_irqrestore(&spp_gchip->lock, flags); + return 0; + } + + reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, val); + sppctl_gpio_out_writel(spp_gchip, reg, reg_off); + + spin_unlock_irqrestore(&spp_gchip->lock, flags); + return 0; +} + +static int sppctl_gpio_get(struct gpio_chip *chip, unsigned int offset) +{ + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + u32 reg_off, bit_off, reg; + + bit_off = sppctl_get_reg_and_bit_offset(offset, ®_off); + reg = sppctl_gpio_in_readl(spp_gchip, reg_off); + + return (reg & BIT(bit_off)) ? 1 : 0; +} + +static void sppctl_gpio_set(struct gpio_chip *chip, unsigned int offset, int val) +{ + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + u32 reg_off, reg; + + reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, val); + sppctl_gpio_out_writel(spp_gchip, reg, reg_off); +} + +static int sppctl_gpio_set_config(struct gpio_chip *chip, unsigned int offset, + unsigned long config) +{ + enum pin_config_param param = pinconf_to_config_param(config); + struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip); + u32 reg_off, reg; + + switch (param) { + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, 1); + sppctl_gpio_od_writel(spp_gchip, reg, reg_off); + break; + + case PIN_CONFIG_INPUT_ENABLE: + break; + + case PIN_CONFIG_OUTPUT: + return sppctl_gpio_direction_output(chip, offset, 0); + + case PIN_CONFIG_PERSIST_STATE: + return -ENOTSUPP; + + default: + return -EINVAL; + } + + return 0; +} + +#ifdef CONFIG_DEBUG_FS +static void sppctl_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) +{ + const char *label; + int i; + + for (i = 0; i < chip->ngpio; i++) { + label = gpiochip_is_requested(chip, i); + if (!label) + label = ""; + + seq_printf(s, " gpio-%03d (%-16.16s | %-16.16s)", i + chip->base, + chip->names[i], label); + seq_printf(s, " %c", sppctl_gpio_get_direction(chip, i) ? 'I' : 'O'); + seq_printf(s, ":%d", sppctl_gpio_get(chip, i)); + seq_printf(s, " %s", sppctl_first_get(chip, i) ? "gpi" : "mux"); + seq_printf(s, " %s", sppctl_master_get(chip, i) ? "gpi" : "iop"); + seq_printf(s, " %s", sppctl_gpio_inv_get(chip, i) ? "inv" : " "); + seq_printf(s, " %s", sppctl_gpio_output_od_get(chip, i) ? "oDr" : ""); + seq_puts(s, "\n"); + } +} +#endif + +static int sppctl_gpio_new(struct platform_device *pdev, struct sppctl_pdata *pctl) +{ + struct sppctl_gpio_chip *spp_gchip; + struct gpio_chip *gchip; + int err; + + spp_gchip = devm_kzalloc(&pdev->dev, sizeof(*spp_gchip), GFP_KERNEL); + if (!spp_gchip) + return -ENOMEM; + pctl->spp_gchip = spp_gchip; + + spp_gchip->gpioxt_base = pctl->gpioxt_base; + spp_gchip->first_base = pctl->first_base; + spin_lock_init(&spp_gchip->lock); + + gchip = &spp_gchip->chip; + gchip->label = SPPCTL_MODULE_NAME; + gchip->parent = &pdev->dev; + gchip->owner = THIS_MODULE; + gchip->request = gpiochip_generic_request; + gchip->free = gpiochip_generic_free; + gchip->get_direction = sppctl_gpio_get_direction; + gchip->direction_input = sppctl_gpio_direction_input; + gchip->direction_output = sppctl_gpio_direction_output; + gchip->get = sppctl_gpio_get; + gchip->set = sppctl_gpio_set; + gchip->set_config = sppctl_gpio_set_config; +#ifdef CONFIG_DEBUG_FS + gchip->dbg_show = sppctl_gpio_dbg_show; +#endif + gchip->base = -1; + gchip->ngpio = sppctl_gpio_list_sz; + gchip->names = sppctl_gpio_list_s; + gchip->of_gpio_n_cells = 2; + + pctl->pctl_grange.npins = gchip->ngpio; + pctl->pctl_grange.name = gchip->label; + pctl->pctl_grange.gc = gchip; + + err = devm_gpiochip_add_data(&pdev->dev, gchip, spp_gchip); + if (err) + return dev_err_probe(&pdev->dev, err, "Failed to add gpiochip!\n"); + + return 0; +} + +static int sppctl_pin_config_get(struct pinctrl_dev *pctldev, unsigned int pin, + unsigned long *config) +{ + struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev); + unsigned int param = pinconf_to_config_param(*config); + unsigned int arg; + + switch (param) { + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + if (!sppctl_gpio_output_od_get(&pctl->spp_gchip->chip, pin)) + return -EINVAL; + arg = 0; + break; + + case PIN_CONFIG_OUTPUT: + if (!sppctl_first_get(&pctl->spp_gchip->chip, pin)) + return -EINVAL; + if (!sppctl_master_get(&pctl->spp_gchip->chip, pin)) + return -EINVAL; + if (sppctl_gpio_get_direction(&pctl->spp_gchip->chip, pin)) + return -EINVAL; + arg = sppctl_gpio_get(&pctl->spp_gchip->chip, pin); + break; + + default: + return -EOPNOTSUPP; + } + *config = pinconf_to_config_packed(param, arg); + + return 0; +} + +static int sppctl_pin_config_set(struct pinctrl_dev *pctldev, unsigned int pin, + unsigned long *configs, unsigned int num_configs) +{ + struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev); + int i; + + /* Special handling for IOP pins */ + if (configs[0] == SPPCTL_IOP_CONFIGS) { + sppctl_first_master_set(&pctl->spp_gchip->chip, pin, mux_f_gpio, mux_m_iop); + return 0; + } + + for (i = 0; i < num_configs; i++) { + if (configs[i] & SPPCTL_PCTL_L_OUT) + sppctl_gpio_direction_output(&pctl->spp_gchip->chip, pin, 0); + if (configs[i] & SPPCTL_PCTL_L_OU1) + sppctl_gpio_direction_output(&pctl->spp_gchip->chip, pin, 1); + if (configs[i] & SPPCTL_PCTL_L_INV) + sppctl_gpio_input_inv_set(&pctl->spp_gchip->chip, pin); + if (configs[i] & SPPCTL_PCTL_L_ONV) + sppctl_gpio_output_inv_set(&pctl->spp_gchip->chip, pin); + if (configs[i] & SPPCTL_PCTL_L_ODR) + sppctl_gpio_output_od_set(&pctl->spp_gchip->chip, pin, 1); + } + + return 0; +} + +static const struct pinconf_ops sppctl_pconf_ops = { + .is_generic = true, + .pin_config_get = sppctl_pin_config_get, + .pin_config_set = sppctl_pin_config_set, +}; + +static int sppctl_get_functions_count(struct pinctrl_dev *pctldev) +{ + return sppctl_list_funcs_sz; +} + +static const char *sppctl_get_function_name(struct pinctrl_dev *pctldev, + unsigned int selector) +{ + return sppctl_list_funcs[selector].name; +} + +static int sppctl_get_function_groups(struct pinctrl_dev *pctldev, unsigned int selector, + const char * const **groups, unsigned int *num_groups) +{ + struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev); + const struct sppctl_func *f = &sppctl_list_funcs[selector]; + int i; + + *num_groups = 0; + switch (f->type) { + case pinmux_type_fpmx: + *num_groups = sppctl_pmux_list_sz; + *groups = sppctl_pmux_list_s; + break; + + case pinmux_type_grp: + if (!f->grps) + break; + + *num_groups = f->gnum; + for (i = 0; i < pctl->unq_grps_sz; i++) + if (pctl->g2fp_maps[i].f_idx == selector) + break; + *groups = &pctl->unq_grps[i]; + break; + + default: + dev_err(pctldev->dev, "Unknown pinmux (selector: %d, type: %d)\n", + selector, f->type); + break; + } + + return 0; +} + +/** + * sppctl_fully_pinmux_conv - Convert GPIO# to fully-pinmux control-field setting + * + * Each fully-pinmux function can be mapped to any of GPIO 8 ~ 71 by + * settings its control-field. Refer to following table: + * + * control-field | GPIO + * --------------+-------- + * 0 | No map + * 1 | 8 + * 2 | 9 + * 3 | 10 + * : | : + * 65 | 71 + */ +static inline int sppctl_fully_pinmux_conv(unsigned int offset) +{ + return (offset < 8) ? 0 : offset - 7; +} + +static int sppctl_set_mux(struct pinctrl_dev *pctldev, unsigned int func_selector, + unsigned int group_selector) +{ + const struct sppctl_func *f = &sppctl_list_funcs[func_selector]; + struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev); + struct grp2fp_map g2fpm = pctl->g2fp_maps[group_selector]; + int i; + + switch (f->type) { + case pinmux_type_fpmx: + sppctl_first_master_set(&pctl->spp_gchip->chip, group_selector, + mux_f_mux, mux_m_keep); + sppctl_func_set(pctl, func_selector, sppctl_fully_pinmux_conv(group_selector)); + break; + + case pinmux_type_grp: + for (i = 0; i < f->grps[g2fpm.g_idx].pnum; i++) + sppctl_first_master_set(&pctl->spp_gchip->chip, + f->grps[g2fpm.g_idx].pins[i], + mux_f_mux, mux_m_keep); + sppctl_gmx_set(pctl, f->roff, f->boff, f->blen, f->grps[g2fpm.g_idx].gval); + break; + + default: + dev_err(pctldev->dev, "Unknown pinmux type (func_selector: %d, type: %d)\n", + func_selector, f->type); + break; + } + + return 0; +} + +static int sppctl_gpio_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, unsigned int offset) +{ + struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev); + int g_f, g_m; + + g_f = sppctl_first_get(&pctl->spp_gchip->chip, offset); + g_m = sppctl_master_get(&pctl->spp_gchip->chip, offset); + if (g_f == mux_f_gpio && g_m == mux_m_gpio) + return 0; + + sppctl_first_master_set(&pctl->spp_gchip->chip, offset, mux_f_gpio, mux_m_gpio); + return 0; +} + +static const struct pinmux_ops sppctl_pinmux_ops = { + .get_functions_count = sppctl_get_functions_count, + .get_function_name = sppctl_get_function_name, + .get_function_groups = sppctl_get_function_groups, + .set_mux = sppctl_set_mux, + .gpio_request_enable = sppctl_gpio_request_enable, + .strict = true, +}; + +static int sppctl_get_groups_count(struct pinctrl_dev *pctldev) +{ + struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev); + + return pctl->unq_grps_sz; +} + +static const char *sppctl_get_group_name(struct pinctrl_dev *pctldev, unsigned int selector) +{ + struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev); + + return pctl->unq_grps[selector]; +} + +static int sppctl_get_group_pins(struct pinctrl_dev *pctldev, unsigned int selector, + const unsigned int **pins, unsigned int *num_pins) +{ + struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev); + struct grp2fp_map g2fpm = pctl->g2fp_maps[selector]; + const struct sppctl_func *f; + + f = &sppctl_list_funcs[g2fpm.f_idx]; + *num_pins = 0; + + /* Except group-pinmux, each group has 1 pin. */ + if (f->type != pinmux_type_grp) { + *num_pins = 1; + *pins = &sppctl_pins_gpio[selector]; + return 0; + } + + /* Group-pinmux may have more than one pin. */ + if (!f->grps) + return 0; + + if (f->gnum < 1) + return 0; + + *num_pins = f->grps[g2fpm.g_idx].pnum; + *pins = f->grps[g2fpm.g_idx].pins; + + return 0; +} + +#ifdef CONFIG_DEBUG_FS +static void sppctl_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, + unsigned int offset) +{ + struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev); + const char *pin_type; + u8 first, master; + + first = sppctl_first_get(&pctl->spp_gchip->chip, offset); + master = sppctl_master_get(&pctl->spp_gchip->chip, offset); + if (first) + if (master) + pin_type = "GPIO"; + else + pin_type = " IOP"; + else + pin_type = " MUX"; + seq_printf(s, " %s", pin_type); +} +#endif + +static int sppctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node *np_config, + struct pinctrl_map **map, unsigned int *num_maps) +{ + struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev); + int nmG = of_property_count_strings(np_config, "groups"); + const struct sppctl_func *f = NULL; + u8 pin_num, pin_type, pin_func; + struct device_node *parent; + unsigned long *configs; + struct property *prop; + const char *s_f, *s_g; + + const __be32 *list; + u32 dt_pin, dt_fun; + int i, size = 0; + + list = of_get_property(np_config, "sunplus,pins", &size); + *num_maps = size / sizeof(*list); + + /* + * Process property: + * sunplus,pins = < u32 u32 u32 ... >; + * + * Each 32-bit integer defines a individual pin in which: + * + * Bit 32~24: defines GPIO pin number. Its range is 0 ~ 98. + * Bit 23~16: defines types: (1) fully-pinmux pins + * (2) IO processor pins + * (3) digital GPIO pins + * Bit 15~8: defines pins of peripherals (which are defined in + * 'include/dt-binging/pinctrl/sppctl.h'). + * Bit 7~0: defines types or initial-state of digital GPIO pins. + */ + for (i = 0; i < (*num_maps); i++) { + dt_pin = be32_to_cpu(list[i]); + pin_num = FIELD_GET(GENMASK(31, 24), dt_pin); + + if (pin_num >= sppctl_pins_all_sz) { + dev_err(pctldev->dev, "Invalid pin property at index %d (0x%08x)\n", + i, dt_pin); + return -EINVAL; + } + } + + if (nmG <= 0) + nmG = 0; + + *map = kcalloc(*num_maps + nmG, sizeof(**map), GFP_KERNEL); + if (!(*map)) + return -ENOMEM; + + parent = of_get_parent(np_config); + for (i = 0; i < (*num_maps); i++) { + dt_pin = be32_to_cpu(list[i]); + pin_num = FIELD_GET(GENMASK(31, 24), dt_pin); + pin_type = FIELD_GET(GENMASK(23, 16), dt_pin); + pin_func = FIELD_GET(GENMASK(15, 8), dt_pin); + (*map)[i].name = parent->name; + + if (pin_type == SPPCTL_PCTL_G_GPIO) { + /* A digital GPIO pin */ + (*map)[i].type = PIN_MAP_TYPE_CONFIGS_PIN; + (*map)[i].data.configs.num_configs = 1; + (*map)[i].data.configs.group_or_pin = pin_get_name(pctldev, pin_num); + configs = kmalloc(sizeof(*configs), GFP_KERNEL); + if (!configs) + goto sppctl_map_err; + *configs = FIELD_GET(GENMASK(7, 0), dt_pin); + (*map)[i].data.configs.configs = configs; + + dev_dbg(pctldev->dev, "%s: GPIO (%s)\n", + (*map)[i].data.configs.group_or_pin, + (*configs & (SPPCTL_PCTL_L_OUT | SPPCTL_PCTL_L_OU1)) ? + "OUT" : "IN"); + } else if (pin_type == SPPCTL_PCTL_G_IOPP) { + /* A IO Processor (IOP) pin */ + (*map)[i].type = PIN_MAP_TYPE_CONFIGS_PIN; + (*map)[i].data.configs.num_configs = 1; + (*map)[i].data.configs.group_or_pin = pin_get_name(pctldev, pin_num); + configs = kmalloc(sizeof(*configs), GFP_KERNEL); + if (!configs) + goto sppctl_map_err; + *configs = SPPCTL_IOP_CONFIGS; + (*map)[i].data.configs.configs = configs; + + dev_dbg(pctldev->dev, "%s: IOP\n", + (*map)[i].data.configs.group_or_pin); + } else { + /* A fully-pinmux pin */ + (*map)[i].type = PIN_MAP_TYPE_MUX_GROUP; + (*map)[i].data.mux.function = sppctl_list_funcs[pin_func].name; + (*map)[i].data.mux.group = pin_get_name(pctldev, pin_num); + + dev_dbg(pctldev->dev, "%s: %s\n", (*map)[i].data.mux.group, + (*map)[i].data.mux.function); + } + } + + /* + * Process properties: + * function = "xxx"; + * groups = "yyy"; + */ + if (nmG > 0 && of_property_read_string(np_config, "function", &s_f) == 0) { + of_property_for_each_string(np_config, "groups", prop, s_g) { + (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP; + (*map)[*num_maps].data.mux.function = s_f; + (*map)[*num_maps].data.mux.group = s_g; + (*num_maps)++; + + dev_dbg(pctldev->dev, "%s: %s\n", s_f, s_g); + } + } + + /* + * Process property: + * sunplus,zerofunc = < u32 u32 u32 ...> + */ + list = of_get_property(np_config, "sunplus,zerofunc", &size); + if (list) { + for (i = 0; i < (size / sizeof(*list)); i++) { + dt_fun = be32_to_cpu(list[i]); + if (dt_fun >= sppctl_list_funcs_sz) { + dev_err(pctldev->dev, "Zero-func %d out of range!\n", + dt_fun); + continue; + } + + f = &sppctl_list_funcs[dt_fun]; + switch (f->type) { + case pinmux_type_fpmx: + sppctl_func_set(pctl, dt_fun, 0); + dev_dbg(pctldev->dev, "%s: No map\n", f->name); + break; + + case pinmux_type_grp: + sppctl_gmx_set(pctl, f->roff, f->boff, f->blen, 0); + dev_dbg(pctldev->dev, "%s: No map\n", f->name); + break; + + default: + dev_err(pctldev->dev, "Wrong zero-group: %d (%s)\n", + dt_fun, f->name); + break; + } + } + } + + of_node_put(parent); + dev_dbg(pctldev->dev, "%d pins mapped\n", *num_maps); + return 0; + +sppctl_map_err: + for (i = 0; i < (*num_maps); i++) + if ((*map)[i].type == PIN_MAP_TYPE_CONFIGS_PIN) + kfree((*map)[i].data.configs.configs); + kfree(*map); + of_node_put(parent); + return -ENOMEM; +} + +static const struct pinctrl_ops sppctl_pctl_ops = { + .get_groups_count = sppctl_get_groups_count, + .get_group_name = sppctl_get_group_name, + .get_group_pins = sppctl_get_group_pins, +#ifdef CONFIG_DEBUG_FS + .pin_dbg_show = sppctl_pin_dbg_show, +#endif + .dt_node_to_map = sppctl_dt_node_to_map, + .dt_free_map = pinctrl_utils_free_map, +}; + +static int sppctl_group_groups(struct platform_device *pdev) +{ + struct sppctl_pdata *sppctl = platform_get_drvdata(pdev); + int i, k, j; + + /* Calculate number of total group (GPIO + group-pinmux group). */ + sppctl->unq_grps_sz = sppctl_gpio_list_sz; + for (i = 0; i < sppctl_list_funcs_sz; i++) + if (sppctl_list_funcs[i].type == pinmux_type_grp) + sppctl->unq_grps_sz += sppctl_list_funcs[i].gnum; + + sppctl->unq_grps = devm_kcalloc(&pdev->dev, sppctl->unq_grps_sz + 1, + sizeof(*sppctl->unq_grps), GFP_KERNEL); + if (!sppctl->unq_grps) + return -ENOMEM; + + sppctl->g2fp_maps = devm_kcalloc(&pdev->dev, sppctl->unq_grps_sz + 1, + sizeof(*sppctl->g2fp_maps), GFP_KERNEL); + if (!sppctl->g2fp_maps) + return -ENOMEM; + + /* Add GPIO pins. */ + for (i = 0; i < sppctl_gpio_list_sz; i++) { + sppctl->unq_grps[i] = sppctl_gpio_list_s[i]; + sppctl->g2fp_maps[i].f_idx = 0; + sppctl->g2fp_maps[i].g_idx = i; + } + + /* Add group-pinmux to end of GPIO pins. */ + j = sppctl_gpio_list_sz; + for (i = 0; i < sppctl_list_funcs_sz; i++) { + if (sppctl_list_funcs[i].type != pinmux_type_grp) + continue; + + for (k = 0; k < sppctl_list_funcs[i].gnum; k++) { + sppctl->unq_grps[j] = sppctl_list_funcs[i].grps[k].name; + sppctl->g2fp_maps[j].f_idx = i; + sppctl->g2fp_maps[j].g_idx = k; + j++; + } + } + + return 0; +} + +static int sppctl_pinctrl_init(struct platform_device *pdev) +{ + struct sppctl_pdata *sppctl = platform_get_drvdata(pdev); + int err; + + sppctl->pctl_desc.owner = THIS_MODULE; + sppctl->pctl_desc.name = dev_name(&pdev->dev); + sppctl->pctl_desc.pins = sppctl_pins_all; + sppctl->pctl_desc.npins = sppctl_pins_all_sz; + sppctl->pctl_desc.pctlops = &sppctl_pctl_ops; + sppctl->pctl_desc.confops = &sppctl_pconf_ops; + sppctl->pctl_desc.pmxops = &sppctl_pinmux_ops; + + err = sppctl_group_groups(pdev); + if (err) + return err; + + err = devm_pinctrl_register_and_init(&pdev->dev, &sppctl->pctl_desc, + sppctl, &sppctl->pctl_dev); + if (err) + return dev_err_probe(&pdev->dev, err, "Failed to register pinctrl!\n"); + + pinctrl_enable(sppctl->pctl_dev); + return 0; +} + +static int sppctl_resource_map(struct platform_device *pdev, struct sppctl_pdata *sppctl) +{ + sppctl->moon2_base = devm_platform_ioremap_resource_byname(pdev, "moon2"); + if (IS_ERR(sppctl->moon2_base)) + return PTR_ERR(sppctl->moon2_base); + + sppctl->gpioxt_base = devm_platform_ioremap_resource_byname(pdev, "gpioxt"); + if (IS_ERR(sppctl->gpioxt_base)) + return PTR_ERR(sppctl->gpioxt_base); + + sppctl->first_base = devm_platform_ioremap_resource_byname(pdev, "first"); + if (IS_ERR(sppctl->first_base)) + return PTR_ERR(sppctl->first_base); + + sppctl->moon1_base = devm_platform_ioremap_resource_byname(pdev, "moon1"); + if (IS_ERR(sppctl->moon1_base)) + return PTR_ERR(sppctl->moon1_base); + + return 0; +} + +static int sppctl_probe(struct platform_device *pdev) +{ + struct sppctl_pdata *sppctl; + int ret; + + sppctl = devm_kzalloc(&pdev->dev, sizeof(*sppctl), GFP_KERNEL); + if (!sppctl) + return -ENOMEM; + platform_set_drvdata(pdev, sppctl); + + ret = sppctl_resource_map(pdev, sppctl); + if (ret) + return ret; + + ret = sppctl_gpio_new(pdev, sppctl); + if (ret) + return ret; + + ret = sppctl_pinctrl_init(pdev); + if (ret) + return ret; + + pinctrl_add_gpio_range(sppctl->pctl_dev, &sppctl->pctl_grange); + + return 0; +} + +static const struct of_device_id sppctl_match_table[] = { + { .compatible = "sunplus,sp7021-pctl" }, + { /* sentinel */ } +}; + +static struct platform_driver sppctl_pinctrl_driver = { + .driver = { + .name = SPPCTL_MODULE_NAME, + .of_match_table = sppctl_match_table, + }, + .probe = sppctl_probe, +}; +builtin_platform_driver(sppctl_pinctrl_driver) + +MODULE_AUTHOR("Dvorkin Dmitry <dvorkin@tibbo.com>"); +MODULE_AUTHOR("Wells Lu <wellslutw@gmail.com>"); +MODULE_DESCRIPTION("Sunplus SP7021 Pin Control and GPIO driver"); +MODULE_LICENSE("GPL v2"); |