// SPDX-License-Identifier: GPL-2.0
/*
* SP7021 Pin Controller Driver.
* Copyright (C) Sunplus Tech / Tibbo Tech.
*/
#include <linux/cleanup.h>
#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/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;
}
static void sppctl_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
int i;
for (i = 0; i < chip->ngpio; i++) {
char *label __free(kfree) = gpiochip_dup_line_label(chip, i);
if (IS_ERR(label))
continue;
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");
}
}
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;
gchip->dbg_show = IS_ENABLED(CONFIG_DEBUG_FS) ?
sppctl_gpio_dbg_show : NULL;
gchip->base = -1;
gchip->ngpio = sppctl_gpio_list_sz;
gchip->names = sppctl_gpio_list_s;
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 <[email protected]>");
MODULE_AUTHOR("Wells Lu <[email protected]>");
MODULE_DESCRIPTION("Sunplus SP7021 Pin Control and GPIO driver");
MODULE_LICENSE("GPL v2");
Codebase Browser
linux