#include <linux/clk.h>
#include <linux/err.h>
#include <linux/gpio/driver.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/property.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/string_helpers.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/machine.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include "pinctrl-at91.h"
#include "core.h"
#define MAX_GPIO_BANKS 5
#define MAX_NB_GPIO_PER_BANK 32
struct at91_pinctrl_mux_ops;
struct at91_gpio_chip {
struct gpio_chip chip;
struct pinctrl_gpio_range range;
struct at91_gpio_chip *next;
int pioc_hwirq;
int pioc_virq;
void __iomem *regbase;
struct clk *clock;
const struct at91_pinctrl_mux_ops *ops;
u32 wakeups;
u32 backups;
u32 id;
};
static struct at91_gpio_chip *gpio_chips[MAX_GPIO_BANKS];
static int gpio_banks;
#define PULL_UP (1 << 0)
#define MULTI_DRIVE (1 << 1)
#define DEGLITCH (1 << 2)
#define PULL_DOWN (1 << 3)
#define DIS_SCHMIT (1 << 4)
#define DRIVE_STRENGTH_SHIFT 5
#define DRIVE_STRENGTH_MASK 0x3
#define DRIVE_STRENGTH (DRIVE_STRENGTH_MASK << DRIVE_STRENGTH_SHIFT)
#define OUTPUT (1 << 7)
#define OUTPUT_VAL_SHIFT 8
#define OUTPUT_VAL (0x1 << OUTPUT_VAL_SHIFT)
#define SLEWRATE_SHIFT 9
#define SLEWRATE_MASK 0x1
#define SLEWRATE (SLEWRATE_MASK << SLEWRATE_SHIFT)
#define DEBOUNCE (1 << 16)
#define DEBOUNCE_VAL_SHIFT 17
#define DEBOUNCE_VAL (0x3fff << DEBOUNCE_VAL_SHIFT)
enum drive_strength_bit {
DRIVE_STRENGTH_BIT_DEF,
DRIVE_STRENGTH_BIT_LOW,
DRIVE_STRENGTH_BIT_MED,
DRIVE_STRENGTH_BIT_HI,
};
#define DRIVE_STRENGTH_BIT_MSK(name) (DRIVE_STRENGTH_BIT_##name << \
DRIVE_STRENGTH_SHIFT)
enum slewrate_bit {
SLEWRATE_BIT_ENA,
SLEWRATE_BIT_DIS,
};
#define SLEWRATE_BIT_MSK(name) (SLEWRATE_BIT_##name << SLEWRATE_SHIFT)
struct at91_pmx_func {
const char *name;
const char **groups;
unsigned ngroups;
};
enum at91_mux {
AT91_MUX_GPIO = 0,
AT91_MUX_PERIPH_A = 1,
AT91_MUX_PERIPH_B = 2,
AT91_MUX_PERIPH_C = 3,
AT91_MUX_PERIPH_D = 4,
};
struct at91_pmx_pin {
uint32_t bank;
uint32_t pin;
enum at91_mux mux;
unsigned long conf;
};
struct at91_pin_group {
const char *name;
struct at91_pmx_pin *pins_conf;
unsigned int *pins;
unsigned npins;
};
struct at91_pinctrl_mux_ops {
enum at91_mux (*get_periph)(void __iomem *pio, unsigned mask);
void (*mux_A_periph)(void __iomem *pio, unsigned mask);
void (*mux_B_periph)(void __iomem *pio, unsigned mask);
void (*mux_C_periph)(void __iomem *pio, unsigned mask);
void (*mux_D_periph)(void __iomem *pio, unsigned mask);
bool (*get_deglitch)(void __iomem *pio, unsigned pin);
void (*set_deglitch)(void __iomem *pio, unsigned mask, bool is_on);
bool (*get_debounce)(void __iomem *pio, unsigned pin, u32 *div);
void (*set_debounce)(void __iomem *pio, unsigned mask, bool is_on, u32 div);
bool (*get_pulldown)(void __iomem *pio, unsigned pin);
void (*set_pulldown)(void __iomem *pio, unsigned mask, bool is_on);
bool (*get_schmitt_trig)(void __iomem *pio, unsigned pin);
void (*disable_schmitt_trig)(void __iomem *pio, unsigned mask);
unsigned (*get_drivestrength)(void __iomem *pio, unsigned pin);
void (*set_drivestrength)(void __iomem *pio, unsigned pin,
u32 strength);
unsigned (*get_slewrate)(void __iomem *pio, unsigned pin);
void (*set_slewrate)(void __iomem *pio, unsigned pin, u32 slewrate);
int (*irq_type)(struct irq_data *d, unsigned type);
};
static int gpio_irq_type(struct irq_data *d, unsigned type);
static int alt_gpio_irq_type(struct irq_data *d, unsigned type);
struct at91_pinctrl {
struct device *dev;
struct pinctrl_dev *pctl;
int nactive_banks;
uint32_t *mux_mask;
int nmux;
struct at91_pmx_func *functions;
int nfunctions;
struct at91_pin_group *groups;
int ngroups;
const struct at91_pinctrl_mux_ops *ops;
};
static inline const struct at91_pin_group *at91_pinctrl_find_group_by_name(
const struct at91_pinctrl *info,
const char *name)
{
const struct at91_pin_group *grp = NULL;
int i;
for (i = 0; i < info->ngroups; i++) {
if (strcmp(info->groups[i].name, name))
continue;
grp = &info->groups[i];
dev_dbg(info->dev, "%s: %d 0:%d\n", name, grp->npins, grp->pins[0]);
break;
}
return grp;
}
static int at91_get_groups_count(struct pinctrl_dev *pctldev)
{
struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
return info->ngroups;
}
static const char *at91_get_group_name(struct pinctrl_dev *pctldev,
unsigned selector)
{
struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
return info->groups[selector].name;
}
static int at91_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
const unsigned **pins,
unsigned *npins)
{
struct at91_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 void at91_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
unsigned offset)
{
seq_printf(s, "%s", dev_name(pctldev->dev));
}
static int at91_dt_node_to_map(struct pinctrl_dev *pctldev,
struct device_node *np,
struct pinctrl_map **map, unsigned *num_maps)
{
struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
const struct at91_pin_group *grp;
struct pinctrl_map *new_map;
struct device_node *parent;
int map_num = 1;
int i;
grp = at91_pinctrl_find_group_by_name(info, np->name);
if (!grp) {
dev_err(info->dev, "unable to find group for node %pOFn\n",
np);
return -EINVAL;
}
map_num += grp->npins;
new_map = devm_kcalloc(pctldev->dev, map_num, sizeof(*new_map),
GFP_KERNEL);
if (!new_map)
return -ENOMEM;
*map = new_map;
*num_maps = map_num;
parent = of_get_parent(np);
if (!parent) {
devm_kfree(pctldev->dev, new_map);
return -EINVAL;
}
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);
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->pins_conf[i].conf;
new_map[i].data.configs.num_configs = 1;
}
dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
(*map)->data.mux.function, (*map)->data.mux.group, map_num);
return 0;
}
static void at91_dt_free_map(struct pinctrl_dev *pctldev,
struct pinctrl_map *map, unsigned num_maps)
{
}
static const struct pinctrl_ops at91_pctrl_ops = {
.get_groups_count = at91_get_groups_count,
.get_group_name = at91_get_group_name,
.get_group_pins = at91_get_group_pins,
.pin_dbg_show = at91_pin_dbg_show,
.dt_node_to_map = at91_dt_node_to_map,
.dt_free_map = at91_dt_free_map,
};
static void __iomem *pin_to_controller(struct at91_pinctrl *info,
unsigned int bank)
{
if (!gpio_chips[bank])
return NULL;
return gpio_chips[bank]->regbase;
}
static inline int pin_to_bank(unsigned pin)
{
return pin /= MAX_NB_GPIO_PER_BANK;
}
static unsigned pin_to_mask(unsigned int pin)
{
return 1 << pin;
}
static unsigned two_bit_pin_value_shift_amount(unsigned int pin)
{
return 2*((pin >= MAX_NB_GPIO_PER_BANK/2)
? pin - MAX_NB_GPIO_PER_BANK/2 : pin);
}
static unsigned sama5d3_get_drive_register(unsigned int pin)
{
return (pin >= MAX_NB_GPIO_PER_BANK/2)
? SAMA5D3_PIO_DRIVER2 : SAMA5D3_PIO_DRIVER1;
}
static unsigned at91sam9x5_get_drive_register(unsigned int pin)
{
return (pin >= MAX_NB_GPIO_PER_BANK/2)
? AT91SAM9X5_PIO_DRIVER2 : AT91SAM9X5_PIO_DRIVER1;
}
static void at91_mux_disable_interrupt(void __iomem *pio, unsigned mask)
{
writel_relaxed(mask, pio + PIO_IDR);
}
static unsigned at91_mux_get_pullup(void __iomem *pio, unsigned pin)
{
return !((readl_relaxed(pio + PIO_PUSR) >> pin) & 0x1);
}
static void at91_mux_set_pullup(void __iomem *pio, unsigned mask, bool on)
{
if (on)
writel_relaxed(mask, pio + PIO_PPDDR);
writel_relaxed(mask, pio + (on ? PIO_PUER : PIO_PUDR));
}
static bool at91_mux_get_output(void __iomem *pio, unsigned int pin, bool *val)
{
*val = (readl_relaxed(pio + PIO_ODSR) >> pin) & 0x1;
return (readl_relaxed(pio + PIO_OSR) >> pin) & 0x1;
}
static void at91_mux_set_output(void __iomem *pio, unsigned int mask,
bool is_on, bool val)
{
writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR));
writel_relaxed(mask, pio + (is_on ? PIO_OER : PIO_ODR));
}
static unsigned at91_mux_get_multidrive(void __iomem *pio, unsigned pin)
{
return (readl_relaxed(pio + PIO_MDSR) >> pin) & 0x1;
}
static void at91_mux_set_multidrive(void __iomem *pio, unsigned mask, bool on)
{
writel_relaxed(mask, pio + (on ? PIO_MDER : PIO_MDDR));
}
static void at91_mux_set_A_periph(void __iomem *pio, unsigned mask)
{
writel_relaxed(mask, pio + PIO_ASR);
}
static void at91_mux_set_B_periph(void __iomem *pio, unsigned mask)
{
writel_relaxed(mask, pio + PIO_BSR);
}
static void at91_mux_pio3_set_A_periph(void __iomem *pio, unsigned mask)
{
writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) & ~mask,
pio + PIO_ABCDSR1);
writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) & ~mask,
pio + PIO_ABCDSR2);
}
static void at91_mux_pio3_set_B_periph(void __iomem *pio, unsigned mask)
{
writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) | mask,
pio + PIO_ABCDSR1);
writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) & ~mask,
pio + PIO_ABCDSR2);
}
static void at91_mux_pio3_set_C_periph(void __iomem *pio, unsigned mask)
{
writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) & ~mask, pio + PIO_ABCDSR1);
writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) | mask, pio + PIO_ABCDSR2);
}
static void at91_mux_pio3_set_D_periph(void __iomem *pio, unsigned mask)
{
writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) | mask, pio + PIO_ABCDSR1);
writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) | mask, pio + PIO_ABCDSR2);
}
static enum at91_mux at91_mux_pio3_get_periph(void __iomem *pio, unsigned mask)
{
unsigned select;
if (readl_relaxed(pio + PIO_PSR) & mask)
return AT91_MUX_GPIO;
select = !!(readl_relaxed(pio + PIO_ABCDSR1) & mask);
select |= (!!(readl_relaxed(pio + PIO_ABCDSR2) & mask) << 1);
return select + 1;
}
static enum at91_mux at91_mux_get_periph(void __iomem *pio, unsigned mask)
{
unsigned select;
if (readl_relaxed(pio + PIO_PSR) & mask)
return AT91_MUX_GPIO;
select = readl_relaxed(pio + PIO_ABSR) & mask;
return select + 1;
}
static bool at91_mux_get_deglitch(void __iomem *pio, unsigned pin)
{
return (readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1;
}
static void at91_mux_set_deglitch(void __iomem *pio, unsigned mask, bool is_on)
{
writel_relaxed(mask, pio + (is_on ? PIO_IFER : PIO_IFDR));
}
static bool at91_mux_pio3_get_deglitch(void __iomem *pio, unsigned pin)
{
if ((readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1)
return !((readl_relaxed(pio + PIO_IFSCSR) >> pin) & 0x1);
return false;
}
static void at91_mux_pio3_set_deglitch(void __iomem *pio, unsigned mask, bool is_on)
{
if (is_on)
writel_relaxed(mask, pio + PIO_IFSCDR);
at91_mux_set_deglitch(pio, mask, is_on);
}
static bool at91_mux_pio3_get_debounce(void __iomem *pio, unsigned pin, u32 *div)
{
*div = readl_relaxed(pio + PIO_SCDR);
return ((readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1) &&
((readl_relaxed(pio + PIO_IFSCSR) >> pin) & 0x1);
}
static void at91_mux_pio3_set_debounce(void __iomem *pio, unsigned mask,
bool is_on, u32 div)
{
if (is_on) {
writel_relaxed(mask, pio + PIO_IFSCER);
writel_relaxed(div & PIO_SCDR_DIV, pio + PIO_SCDR);
writel_relaxed(mask, pio + PIO_IFER);
} else
writel_relaxed(mask, pio + PIO_IFSCDR);
}
static bool at91_mux_pio3_get_pulldown(void __iomem *pio, unsigned pin)
{
return !((readl_relaxed(pio + PIO_PPDSR) >> pin) & 0x1);
}
static void at91_mux_pio3_set_pulldown(void __iomem *pio, unsigned mask, bool is_on)
{
if (is_on)
writel_relaxed(mask, pio + PIO_PUDR);
writel_relaxed(mask, pio + (is_on ? PIO_PPDER : PIO_PPDDR));
}
static void at91_mux_pio3_disable_schmitt_trig(void __iomem *pio, unsigned mask)
{
writel_relaxed(readl_relaxed(pio + PIO_SCHMITT) | mask, pio + PIO_SCHMITT);
}
static bool at91_mux_pio3_get_schmitt_trig(void __iomem *pio, unsigned pin)
{
return (readl_relaxed(pio + PIO_SCHMITT) >> pin) & 0x1;
}
static inline u32 read_drive_strength(void __iomem *reg, unsigned pin)
{
unsigned tmp = readl_relaxed(reg);
tmp = tmp >> two_bit_pin_value_shift_amount(pin);
return tmp & DRIVE_STRENGTH_MASK;
}
static unsigned at91_mux_sama5d3_get_drivestrength(void __iomem *pio,
unsigned pin)
{
unsigned tmp = read_drive_strength(pio +
sama5d3_get_drive_register(pin), pin);
if (!tmp)
tmp = DRIVE_STRENGTH_BIT_MSK(LOW);
return tmp;
}
static unsigned at91_mux_sam9x5_get_drivestrength(void __iomem *pio,
unsigned pin)
{
unsigned tmp = read_drive_strength(pio +
at91sam9x5_get_drive_register(pin), pin);
tmp = DRIVE_STRENGTH_BIT_MSK(HI) - tmp;
return tmp;
}
static unsigned at91_mux_sam9x60_get_drivestrength(void __iomem *pio,
unsigned pin)
{
unsigned tmp = readl_relaxed(pio + SAM9X60_PIO_DRIVER1);
if (tmp & BIT(pin))
return DRIVE_STRENGTH_BIT_HI;
return DRIVE_STRENGTH_BIT_LOW;
}
static unsigned at91_mux_sam9x60_get_slewrate(void __iomem *pio, unsigned pin)
{
unsigned tmp = readl_relaxed(pio + SAM9X60_PIO_SLEWR);
if ((tmp & BIT(pin)))
return SLEWRATE_BIT_ENA;
return SLEWRATE_BIT_DIS;
}
static void set_drive_strength(void __iomem *reg, unsigned pin, u32 strength)
{
unsigned tmp = readl_relaxed(reg);
unsigned shift = two_bit_pin_value_shift_amount(pin);
tmp &= ~(DRIVE_STRENGTH_MASK << shift);
tmp |= strength << shift;
writel_relaxed(tmp, reg);
}
static void at91_mux_sama5d3_set_drivestrength(void __iomem *pio, unsigned pin,
u32 setting)
{
if (!setting)
return;
set_drive_strength(pio + sama5d3_get_drive_register(pin), pin, setting);
}
static void at91_mux_sam9x5_set_drivestrength(void __iomem *pio, unsigned pin,
u32 setting)
{
if (!setting)
return;
setting = DRIVE_STRENGTH_BIT_MSK(HI) - setting;
set_drive_strength(pio + at91sam9x5_get_drive_register(pin), pin,
setting);
}
static void at91_mux_sam9x60_set_drivestrength(void __iomem *pio, unsigned pin,
u32 setting)
{
unsigned int tmp;
if (setting <= DRIVE_STRENGTH_BIT_DEF ||
setting == DRIVE_STRENGTH_BIT_MED ||
setting > DRIVE_STRENGTH_BIT_HI)
return;
tmp = readl_relaxed(pio + SAM9X60_PIO_DRIVER1);
if (setting == DRIVE_STRENGTH_BIT_LOW)
tmp &= ~BIT(pin);
else
tmp |= BIT(pin);
writel_relaxed(tmp, pio + SAM9X60_PIO_DRIVER1);
}
static void at91_mux_sam9x60_set_slewrate(void __iomem *pio, unsigned pin,
u32 setting)
{
unsigned int tmp;
if (setting < SLEWRATE_BIT_ENA || setting > SLEWRATE_BIT_DIS)
return;
tmp = readl_relaxed(pio + SAM9X60_PIO_SLEWR);
if (setting == SLEWRATE_BIT_DIS)
tmp &= ~BIT(pin);
else
tmp |= BIT(pin);
writel_relaxed(tmp, pio + SAM9X60_PIO_SLEWR);
}
static const struct at91_pinctrl_mux_ops at91rm9200_ops = {
.get_periph = at91_mux_get_periph,
.mux_A_periph = at91_mux_set_A_periph,
.mux_B_periph = at91_mux_set_B_periph,
.get_deglitch = at91_mux_get_deglitch,
.set_deglitch = at91_mux_set_deglitch,
.irq_type = gpio_irq_type,
};
static const struct at91_pinctrl_mux_ops at91sam9x5_ops = {
.get_periph = at91_mux_pio3_get_periph,
.mux_A_periph = at91_mux_pio3_set_A_periph,
.mux_B_periph = at91_mux_pio3_set_B_periph,
.mux_C_periph = at91_mux_pio3_set_C_periph,
.mux_D_periph = at91_mux_pio3_set_D_periph,
.get_deglitch = at91_mux_pio3_get_deglitch,
.set_deglitch = at91_mux_pio3_set_deglitch,
.get_debounce = at91_mux_pio3_get_debounce,
.set_debounce = at91_mux_pio3_set_debounce,
.get_pulldown = at91_mux_pio3_get_pulldown,
.set_pulldown = at91_mux_pio3_set_pulldown,
.get_schmitt_trig = at91_mux_pio3_get_schmitt_trig,
.disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig,
.get_drivestrength = at91_mux_sam9x5_get_drivestrength,
.set_drivestrength = at91_mux_sam9x5_set_drivestrength,
.irq_type = alt_gpio_irq_type,
};
static const struct at91_pinctrl_mux_ops sam9x60_ops = {
.get_periph = at91_mux_pio3_get_periph,
.mux_A_periph = at91_mux_pio3_set_A_periph,
.mux_B_periph = at91_mux_pio3_set_B_periph,
.mux_C_periph = at91_mux_pio3_set_C_periph,
.mux_D_periph = at91_mux_pio3_set_D_periph,
.get_deglitch = at91_mux_pio3_get_deglitch,
.set_deglitch = at91_mux_pio3_set_deglitch,
.get_debounce = at91_mux_pio3_get_debounce,
.set_debounce = at91_mux_pio3_set_debounce,
.get_pulldown = at91_mux_pio3_get_pulldown,
.set_pulldown = at91_mux_pio3_set_pulldown,
.get_schmitt_trig = at91_mux_pio3_get_schmitt_trig,
.disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig,
.get_drivestrength = at91_mux_sam9x60_get_drivestrength,
.set_drivestrength = at91_mux_sam9x60_set_drivestrength,
.get_slewrate = at91_mux_sam9x60_get_slewrate,
.set_slewrate = at91_mux_sam9x60_set_slewrate,
.irq_type = alt_gpio_irq_type,
};
static const struct at91_pinctrl_mux_ops sama5d3_ops = {
.get_periph = at91_mux_pio3_get_periph,
.mux_A_periph = at91_mux_pio3_set_A_periph,
.mux_B_periph = at91_mux_pio3_set_B_periph,
.mux_C_periph = at91_mux_pio3_set_C_periph,
.mux_D_periph = at91_mux_pio3_set_D_periph,
.get_deglitch = at91_mux_pio3_get_deglitch,
.set_deglitch = at91_mux_pio3_set_deglitch,
.get_debounce = at91_mux_pio3_get_debounce,
.set_debounce = at91_mux_pio3_set_debounce,
.get_pulldown = at91_mux_pio3_get_pulldown,
.set_pulldown = at91_mux_pio3_set_pulldown,
.get_schmitt_trig = at91_mux_pio3_get_schmitt_trig,
.disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig,
.get_drivestrength = at91_mux_sama5d3_get_drivestrength,
.set_drivestrength = at91_mux_sama5d3_set_drivestrength,
.irq_type = alt_gpio_irq_type,
};
static void at91_pin_dbg(const struct device *dev, const struct at91_pmx_pin *pin)
{
if (pin->mux) {
dev_dbg(dev, "pio%c%d configured as periph%c with conf = 0x%lx\n",
pin->bank + 'A', pin->pin, pin->mux - 1 + 'A', pin->conf);
} else {
dev_dbg(dev, "pio%c%d configured as gpio with conf = 0x%lx\n",
pin->bank + 'A', pin->pin, pin->conf);
}
}
static int pin_check_config(struct at91_pinctrl *info, const char *name,
int index, const struct at91_pmx_pin *pin)
{
int mux;
if (pin->bank >= gpio_banks) {
dev_err(info->dev, "%s: pin conf %d bank_id %d >= nbanks %d\n",
name, index, pin->bank, gpio_banks);
return -EINVAL;
}
if (!gpio_chips[pin->bank]) {
dev_err(info->dev, "%s: pin conf %d bank_id %d not enabled\n",
name, index, pin->bank);
return -ENXIO;
}
if (pin->pin >= MAX_NB_GPIO_PER_BANK) {
dev_err(info->dev, "%s: pin conf %d pin_bank_id %d >= %d\n",
name, index, pin->pin, MAX_NB_GPIO_PER_BANK);
return -EINVAL;
}
if (!pin->mux)
return 0;
mux = pin->mux - 1;
if (mux >= info->nmux) {
dev_err(info->dev, "%s: pin conf %d mux_id %d >= nmux %d\n",
name, index, mux, info->nmux);
return -EINVAL;
}
if (!(info->mux_mask[pin->bank * info->nmux + mux] & 1 << pin->pin)) {
dev_err(info->dev, "%s: pin conf %d mux_id %d not supported for pio%c%d\n",
name, index, mux, pin->bank + 'A', pin->pin);
return -EINVAL;
}
return 0;
}
static void at91_mux_gpio_disable(void __iomem *pio, unsigned mask)
{
writel_relaxed(mask, pio + PIO_PDR);
}
static void at91_mux_gpio_enable(void __iomem *pio, unsigned mask, bool input)
{
writel_relaxed(mask, pio + PIO_PER);
writel_relaxed(mask, pio + (input ? PIO_ODR : PIO_OER));
}
static int at91_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
unsigned group)
{
struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
const struct at91_pmx_pin *pins_conf = info->groups[group].pins_conf;
const struct at91_pmx_pin *pin;
uint32_t npins = info->groups[group].npins;
int i, ret;
unsigned mask;
void __iomem *pio;
dev_dbg(info->dev, "enable function %s group %s\n",
info->functions[selector].name, info->groups[group].name);
for (i = 0; i < npins; i++) {
pin = &pins_conf[i];
ret = pin_check_config(info, info->groups[group].name, i, pin);
if (ret)
return ret;
}
for (i = 0; i < npins; i++) {
pin = &pins_conf[i];
at91_pin_dbg(info->dev, pin);
pio = pin_to_controller(info, pin->bank);
if (!pio)
continue;
mask = pin_to_mask(pin->pin);
at91_mux_disable_interrupt(pio, mask);
switch (pin->mux) {
case AT91_MUX_GPIO:
at91_mux_gpio_enable(pio, mask, 1);
break;
case AT91_MUX_PERIPH_A:
info->ops->mux_A_periph(pio, mask);
break;
case AT91_MUX_PERIPH_B:
info->ops->mux_B_periph(pio, mask);
break;
case AT91_MUX_PERIPH_C:
if (!info->ops->mux_C_periph)
return -EINVAL;
info->ops->mux_C_periph(pio, mask);
break;
case AT91_MUX_PERIPH_D:
if (!info->ops->mux_D_periph)
return -EINVAL;
info->ops->mux_D_periph(pio, mask);
break;
}
if (pin->mux)
at91_mux_gpio_disable(pio, mask);
}
return 0;
}
static int at91_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
{
struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
return info->nfunctions;
}
static const char *at91_pmx_get_func_name(struct pinctrl_dev *pctldev,
unsigned selector)
{
struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
return info->functions[selector].name;
}
static int at91_pmx_get_groups(struct pinctrl_dev *pctldev, unsigned selector,
const char * const **groups,
unsigned * const num_groups)
{
struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
*groups = info->functions[selector].groups;
*num_groups = info->functions[selector].ngroups;
return 0;
}
static int at91_gpio_request_enable(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned offset)
{
struct at91_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
struct at91_gpio_chip *at91_chip;
struct gpio_chip *chip;
unsigned mask;
if (!range) {
dev_err(npct->dev, "invalid range\n");
return -EINVAL;
}
if (!range->gc) {
dev_err(npct->dev, "missing GPIO chip in range\n");
return -EINVAL;
}
chip = range->gc;
at91_chip = gpiochip_get_data(chip);
dev_dbg(npct->dev, "enable pin %u as GPIO\n", offset);
mask = 1 << (offset - chip->base);
dev_dbg(npct->dev, "enable pin %u as PIO%c%d 0x%x\n",
offset, 'A' + range->id, offset - chip->base, mask);
writel_relaxed(mask, at91_chip->regbase + PIO_PER);
return 0;
}
static void at91_gpio_disable_free(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned offset)
{
struct at91_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
dev_dbg(npct->dev, "disable pin %u as GPIO\n", offset);
}
static const struct pinmux_ops at91_pmx_ops = {
.get_functions_count = at91_pmx_get_funcs_count,
.get_function_name = at91_pmx_get_func_name,
.get_function_groups = at91_pmx_get_groups,
.set_mux = at91_pmx_set,
.gpio_request_enable = at91_gpio_request_enable,
.gpio_disable_free = at91_gpio_disable_free,
};
static int at91_pinconf_get(struct pinctrl_dev *pctldev,
unsigned pin_id, unsigned long *config)
{
struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
void __iomem *pio;
unsigned pin;
int div;
bool out;
*config = 0;
dev_dbg(info->dev, "%s:%d, pin_id=%d", __func__, __LINE__, pin_id);
pio = pin_to_controller(info, pin_to_bank(pin_id));
if (!pio)
return -EINVAL;
pin = pin_id % MAX_NB_GPIO_PER_BANK;
if (at91_mux_get_multidrive(pio, pin))
*config |= MULTI_DRIVE;
if (at91_mux_get_pullup(pio, pin))
*config |= PULL_UP;
if (info->ops->get_deglitch && info->ops->get_deglitch(pio, pin))
*config |= DEGLITCH;
if (info->ops->get_debounce && info->ops->get_debounce(pio, pin, &div))
*config |= DEBOUNCE | (div << DEBOUNCE_VAL_SHIFT);
if (info->ops->get_pulldown && info->ops->get_pulldown(pio, pin))
*config |= PULL_DOWN;
if (info->ops->get_schmitt_trig && info->ops->get_schmitt_trig(pio, pin))
*config |= DIS_SCHMIT;
if (info->ops->get_drivestrength)
*config |= (info->ops->get_drivestrength(pio, pin)
<< DRIVE_STRENGTH_SHIFT);
if (info->ops->get_slewrate)
*config |= (info->ops->get_slewrate(pio, pin) << SLEWRATE_SHIFT);
if (at91_mux_get_output(pio, pin, &out))
*config |= OUTPUT | (out << OUTPUT_VAL_SHIFT);
return 0;
}
static int at91_pinconf_set(struct pinctrl_dev *pctldev,
unsigned pin_id, unsigned long *configs,
unsigned num_configs)
{
struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
unsigned mask;
void __iomem *pio;
int i;
unsigned long config;
unsigned pin;
for (i = 0; i < num_configs; i++) {
config = configs[i];
dev_dbg(info->dev,
"%s:%d, pin_id=%d, config=0x%lx",
__func__, __LINE__, pin_id, config);
pio = pin_to_controller(info, pin_to_bank(pin_id));
if (!pio)
return -EINVAL;
pin = pin_id % MAX_NB_GPIO_PER_BANK;
mask = pin_to_mask(pin);
if (config & PULL_UP && config & PULL_DOWN)
return -EINVAL;
at91_mux_set_output(pio, mask, config & OUTPUT,
(config & OUTPUT_VAL) >> OUTPUT_VAL_SHIFT);
at91_mux_set_pullup(pio, mask, config & PULL_UP);
at91_mux_set_multidrive(pio, mask, config & MULTI_DRIVE);
if (info->ops->set_deglitch)
info->ops->set_deglitch(pio, mask, config & DEGLITCH);
if (info->ops->set_debounce)
info->ops->set_debounce(pio, mask, config & DEBOUNCE,
(config & DEBOUNCE_VAL) >> DEBOUNCE_VAL_SHIFT);
if (info->ops->set_pulldown)
info->ops->set_pulldown(pio, mask, config & PULL_DOWN);
if (info->ops->disable_schmitt_trig && config & DIS_SCHMIT)
info->ops->disable_schmitt_trig(pio, mask);
if (info->ops->set_drivestrength)
info->ops->set_drivestrength(pio, pin,
(config & DRIVE_STRENGTH)
>> DRIVE_STRENGTH_SHIFT);
if (info->ops->set_slewrate)
info->ops->set_slewrate(pio, pin,
(config & SLEWRATE) >> SLEWRATE_SHIFT);
}
return 0;
}
#define DBG_SHOW_FLAG(flag) do { \
if (config & flag) { \
if (num_conf) \
seq_puts(s, "|"); \
seq_puts(s, #flag); \
num_conf++; \
} \
} while (0)
#define DBG_SHOW_FLAG_MASKED(mask, flag, name) do { \
if ((config & mask) == flag) { \
if (num_conf) \
seq_puts(s, "|"); \
seq_puts(s, #name); \
num_conf++; \
} \
} while (0)
static void at91_pinconf_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s, unsigned pin_id)
{
unsigned long config;
int val, num_conf = 0;
at91_pinconf_get(pctldev, pin_id, &config);
DBG_SHOW_FLAG(MULTI_DRIVE);
DBG_SHOW_FLAG(PULL_UP);
DBG_SHOW_FLAG(PULL_DOWN);
DBG_SHOW_FLAG(DIS_SCHMIT);
DBG_SHOW_FLAG(DEGLITCH);
DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(LOW),
DRIVE_STRENGTH_LOW);
DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(MED),
DRIVE_STRENGTH_MED);
DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_BIT_MSK(HI),
DRIVE_STRENGTH_HI);
DBG_SHOW_FLAG(SLEWRATE);
DBG_SHOW_FLAG(DEBOUNCE);
if (config & DEBOUNCE) {
val = config >> DEBOUNCE_VAL_SHIFT;
seq_printf(s, "(%d)", val);
}
return;
}
static void at91_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s, unsigned group)
{
}
static const struct pinconf_ops at91_pinconf_ops = {
.pin_config_get = at91_pinconf_get,
.pin_config_set = at91_pinconf_set,
.pin_config_dbg_show = at91_pinconf_dbg_show,
.pin_config_group_dbg_show = at91_pinconf_group_dbg_show,
};
static struct pinctrl_desc at91_pinctrl_desc = {
.pctlops = &at91_pctrl_ops,
.pmxops = &at91_pmx_ops,
.confops = &at91_pinconf_ops,
.owner = THIS_MODULE,
};
static const char *gpio_compat = "atmel,at91rm9200-gpio";
static void at91_pinctrl_child_count(struct at91_pinctrl *info,
struct device_node *np)
{
struct device_node *child;
for_each_child_of_node(np, child) {
if (of_device_is_compatible(child, gpio_compat)) {
if (of_device_is_available(child))
info->nactive_banks++;
} else {
info->nfunctions++;
info->ngroups += of_get_child_count(child);
}
}
}
static int at91_pinctrl_mux_mask(struct at91_pinctrl *info,
struct device_node *np)
{
int ret = 0;
int size;
const __be32 *list;
list = of_get_property(np, "atmel,mux-mask", &size);
if (!list) {
dev_err(info->dev, "can not read the mux-mask of %d\n", size);
return -EINVAL;
}
size /= sizeof(*list);
if (!size || size % gpio_banks) {
dev_err(info->dev, "wrong mux mask array should be by %d\n", gpio_banks);
return -EINVAL;
}
info->nmux = size / gpio_banks;
info->mux_mask = devm_kcalloc(info->dev, size, sizeof(u32),
GFP_KERNEL);
if (!info->mux_mask)
return -ENOMEM;
ret = of_property_read_u32_array(np, "atmel,mux-mask",
info->mux_mask, size);
if (ret)
dev_err(info->dev, "can not read the mux-mask of %d\n", size);
return ret;
}
static int at91_pinctrl_parse_groups(struct device_node *np,
struct at91_pin_group *grp,
struct at91_pinctrl *info, u32 index)
{
struct at91_pmx_pin *pin;
int size;
const __be32 *list;
int i, j;
dev_dbg(info->dev, "group(%d): %pOFn\n", index, np);
grp->name = np->name;
list = of_get_property(np, "atmel,pins", &size);
size /= sizeof(*list);
if (!size || size % 4) {
dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n");
return -EINVAL;
}
grp->npins = size / 4;
pin = grp->pins_conf = devm_kcalloc(info->dev,
grp->npins,
sizeof(struct at91_pmx_pin),
GFP_KERNEL);
grp->pins = devm_kcalloc(info->dev, grp->npins, sizeof(unsigned int),
GFP_KERNEL);
if (!grp->pins_conf || !grp->pins)
return -ENOMEM;
for (i = 0, j = 0; i < size; i += 4, j++) {
pin->bank = be32_to_cpu(*list++);
pin->pin = be32_to_cpu(*list++);
grp->pins[j] = pin->bank * MAX_NB_GPIO_PER_BANK + pin->pin;
pin->mux = be32_to_cpu(*list++);
pin->conf = be32_to_cpu(*list++);
at91_pin_dbg(info->dev, pin);
pin++;
}
return 0;
}
static int at91_pinctrl_parse_functions(struct device_node *np,
struct at91_pinctrl *info, u32 index)
{
struct at91_pmx_func *func;
struct at91_pin_group *grp;
int ret;
static u32 grp_index;
u32 i = 0;
dev_dbg(info->dev, "parse function(%d): %pOFn\n", index, np);
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_kcalloc(info->dev,
func->ngroups, sizeof(char *), GFP_KERNEL);
if (!func->groups)
return -ENOMEM;
for_each_child_of_node_scoped(np, child) {
func->groups[i] = child->name;
grp = &info->groups[grp_index++];
ret = at91_pinctrl_parse_groups(child, grp, info, i++);
if (ret)
return ret;
}
return 0;
}
static const struct of_device_id at91_pinctrl_of_match[] = {
{ .compatible = "atmel,sama5d3-pinctrl", .data = &sama5d3_ops },
{ .compatible = "atmel,at91sam9x5-pinctrl", .data = &at91sam9x5_ops },
{ .compatible = "atmel,at91rm9200-pinctrl", .data = &at91rm9200_ops },
{ .compatible = "microchip,sam9x60-pinctrl", .data = &sam9x60_ops },
{ }
};
static int at91_pinctrl_probe_dt(struct platform_device *pdev,
struct at91_pinctrl *info)
{
struct device *dev = &pdev->dev;
int ret = 0;
int i, j, ngpio_chips_enabled = 0;
uint32_t *tmp;
struct device_node *np = dev->of_node;
if (!np)
return -ENODEV;
info->dev = &pdev->dev;
info->ops = device_get_match_data(&pdev->dev);
at91_pinctrl_child_count(info, np);
for (i = 0; i < MAX_GPIO_BANKS; i++)
if (gpio_chips[i])
ngpio_chips_enabled++;
if (ngpio_chips_enabled < info->nactive_banks)
return -EPROBE_DEFER;
ret = at91_pinctrl_mux_mask(info, np);
if (ret)
return ret;
dev_dbg(dev, "nmux = %d\n", info->nmux);
dev_dbg(dev, "mux-mask\n");
tmp = info->mux_mask;
for (i = 0; i < gpio_banks; i++) {
for (j = 0; j < info->nmux; j++, tmp++) {
dev_dbg(dev, "%d:%d\t0x%x\n", i, j, tmp[0]);
}
}
dev_dbg(dev, "nfunctions = %d\n", info->nfunctions);
dev_dbg(dev, "ngroups = %d\n", info->ngroups);
info->functions = devm_kcalloc(dev, info->nfunctions, sizeof(*info->functions),
GFP_KERNEL);
if (!info->functions)
return -ENOMEM;
info->groups = devm_kcalloc(dev, info->ngroups, sizeof(*info->groups),
GFP_KERNEL);
if (!info->groups)
return -ENOMEM;
dev_dbg(dev, "nbanks = %d\n", gpio_banks);
dev_dbg(dev, "nfunctions = %d\n", info->nfunctions);
dev_dbg(dev, "ngroups = %d\n", info->ngroups);
i = 0;
for_each_child_of_node_scoped(np, child) {
if (of_device_is_compatible(child, gpio_compat))
continue;
ret = at91_pinctrl_parse_functions(child, info, i++);
if (ret)
return dev_err_probe(dev, ret, "failed to parse function\n");
}
return 0;
}
static int at91_pinctrl_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct at91_pinctrl *info;
struct pinctrl_pin_desc *pdesc;
int ret, i, j, k;
info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
ret = at91_pinctrl_probe_dt(pdev, info);
if (ret)
return ret;
at91_pinctrl_desc.name = dev_name(dev);
at91_pinctrl_desc.npins = gpio_banks * MAX_NB_GPIO_PER_BANK;
at91_pinctrl_desc.pins = pdesc =
devm_kcalloc(dev, at91_pinctrl_desc.npins, sizeof(*pdesc), GFP_KERNEL);
if (!at91_pinctrl_desc.pins)
return -ENOMEM;
for (i = 0, k = 0; i < gpio_banks; i++) {
char **names;
names = devm_kasprintf_strarray(dev, "pio", MAX_NB_GPIO_PER_BANK);
if (IS_ERR(names))
return PTR_ERR(names);
for (j = 0; j < MAX_NB_GPIO_PER_BANK; j++, k++) {
char *name = names[j];
strreplace(name, '-', i + 'A');
pdesc->number = k;
pdesc->name = name;
pdesc++;
}
}
platform_set_drvdata(pdev, info);
info->pctl = devm_pinctrl_register(dev, &at91_pinctrl_desc, info);
if (IS_ERR(info->pctl))
return dev_err_probe(dev, PTR_ERR(info->pctl), "could not register AT91 pinctrl driver\n");
for (i = 0; i < gpio_banks; i++)
if (gpio_chips[i]) {
pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range);
gpiochip_add_pin_range(&gpio_chips[i]->chip, dev_name(info->pctl->dev), 0,
gpio_chips[i]->range.pin_base, gpio_chips[i]->range.npins);
}
dev_info(dev, "initialized AT91 pinctrl driver\n");
return 0;
}
static int at91_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
{
struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
void __iomem *pio = at91_gpio->regbase;
unsigned mask = 1 << offset;
u32 osr;
osr = readl_relaxed(pio + PIO_OSR);
if (osr & mask)
return GPIO_LINE_DIRECTION_OUT;
return GPIO_LINE_DIRECTION_IN;
}
static int at91_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
{
struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
void __iomem *pio = at91_gpio->regbase;
unsigned mask = 1 << offset;
writel_relaxed(mask, pio + PIO_ODR);
return 0;
}
static int at91_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
void __iomem *pio = at91_gpio->regbase;
unsigned mask = 1 << offset;
u32 pdsr;
pdsr = readl_relaxed(pio + PIO_PDSR);
return (pdsr & mask) != 0;
}
static int at91_gpio_set(struct gpio_chip *chip, unsigned int offset, int val)
{
struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
void __iomem *pio = at91_gpio->regbase;
unsigned mask = 1 << offset;
writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR));
return 0;
}
static int at91_gpio_set_multiple(struct gpio_chip *chip,
unsigned long *mask, unsigned long *bits)
{
struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
void __iomem *pio = at91_gpio->regbase;
#define BITS_MASK(bits) (((bits) == 32) ? ~0U : (BIT(bits) - 1))
uint32_t set_mask = (*mask & *bits) & BITS_MASK(chip->ngpio);
uint32_t clear_mask = (*mask & ~(*bits)) & BITS_MASK(chip->ngpio);
writel_relaxed(set_mask, pio + PIO_SODR);
writel_relaxed(clear_mask, pio + PIO_CODR);
return 0;
}
static int at91_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
int val)
{
struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
void __iomem *pio = at91_gpio->regbase;
unsigned mask = 1 << offset;
writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR));
writel_relaxed(mask, pio + PIO_OER);
return 0;
}
#ifdef CONFIG_DEBUG_FS
static void at91_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
{
enum at91_mux mode;
int i;
struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip);
void __iomem *pio = at91_gpio->regbase;
const char *gpio_label;
for_each_requested_gpio(chip, i, gpio_label) {
unsigned mask = pin_to_mask(i);
mode = at91_gpio->ops->get_periph(pio, mask);
seq_printf(s, "[%s] GPIO%s%d: ",
gpio_label, chip->label, i);
if (mode == AT91_MUX_GPIO) {
seq_printf(s, "[gpio] ");
seq_printf(s, "%s ",
readl_relaxed(pio + PIO_OSR) & mask ?
"output" : "input");
seq_printf(s, "%s\n",
readl_relaxed(pio + PIO_PDSR) & mask ?
"set" : "clear");
} else {
seq_printf(s, "[periph %c]\n",
mode + 'A' - 1);
}
}
}
#else
#define at91_gpio_dbg_show NULL
#endif
static int gpio_irq_request_resources(struct irq_data *d)
{
struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
return gpiochip_lock_as_irq(&at91_gpio->chip, irqd_to_hwirq(d));
}
static void gpio_irq_release_resources(struct irq_data *d)
{
struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
gpiochip_unlock_as_irq(&at91_gpio->chip, irqd_to_hwirq(d));
}
static void gpio_irq_mask(struct irq_data *d)
{
struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
void __iomem *pio = at91_gpio->regbase;
unsigned mask = 1 << d->hwirq;
unsigned gpio = irqd_to_hwirq(d);
gpiochip_disable_irq(&at91_gpio->chip, gpio);
if (pio)
writel_relaxed(mask, pio + PIO_IDR);
}
static void gpio_irq_unmask(struct irq_data *d)
{
struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
void __iomem *pio = at91_gpio->regbase;
unsigned mask = 1 << d->hwirq;
unsigned gpio = irqd_to_hwirq(d);
gpiochip_enable_irq(&at91_gpio->chip, gpio);
if (pio)
writel_relaxed(mask, pio + PIO_IER);
}
static int gpio_irq_type(struct irq_data *d, unsigned type)
{
switch (type) {
case IRQ_TYPE_NONE:
case IRQ_TYPE_EDGE_BOTH:
return 0;
default:
return -EINVAL;
}
}
static int alt_gpio_irq_type(struct irq_data *d, unsigned type)
{
struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
void __iomem *pio = at91_gpio->regbase;
unsigned mask = 1 << d->hwirq;
switch (type) {
case IRQ_TYPE_EDGE_RISING:
irq_set_handler_locked(d, handle_simple_irq);
writel_relaxed(mask, pio + PIO_ESR);
writel_relaxed(mask, pio + PIO_REHLSR);
break;
case IRQ_TYPE_EDGE_FALLING:
irq_set_handler_locked(d, handle_simple_irq);
writel_relaxed(mask, pio + PIO_ESR);
writel_relaxed(mask, pio + PIO_FELLSR);
break;
case IRQ_TYPE_LEVEL_LOW:
irq_set_handler_locked(d, handle_level_irq);
writel_relaxed(mask, pio + PIO_LSR);
writel_relaxed(mask, pio + PIO_FELLSR);
break;
case IRQ_TYPE_LEVEL_HIGH:
irq_set_handler_locked(d, handle_level_irq);
writel_relaxed(mask, pio + PIO_LSR);
writel_relaxed(mask, pio + PIO_REHLSR);
break;
case IRQ_TYPE_EDGE_BOTH:
irq_set_handler_locked(d, handle_simple_irq);
writel_relaxed(mask, pio + PIO_AIMDR);
return 0;
case IRQ_TYPE_NONE:
default:
pr_warn("AT91: No type for GPIO irq offset %d\n", d->irq);
return -EINVAL;
}
writel_relaxed(mask, pio + PIO_AIMER);
return 0;
}
static void gpio_irq_ack(struct irq_data *d)
{
}
static int gpio_irq_set_wake(struct irq_data *d, unsigned state)
{
struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
unsigned mask = 1 << d->hwirq;
if (state)
at91_gpio->wakeups |= mask;
else
at91_gpio->wakeups &= ~mask;
irq_set_irq_wake(at91_gpio->pioc_virq, state);
return 0;
}
static int at91_gpio_suspend(struct device *dev)
{
struct at91_gpio_chip *at91_chip = dev_get_drvdata(dev);
void __iomem *pio = at91_chip->regbase;
at91_chip->backups = readl_relaxed(pio + PIO_IMR);
writel_relaxed(at91_chip->backups, pio + PIO_IDR);
writel_relaxed(at91_chip->wakeups, pio + PIO_IER);
if (!at91_chip->wakeups)
clk_disable_unprepare(at91_chip->clock);
else
dev_dbg(dev, "GPIO-%c may wake for %08x\n",
'A' + at91_chip->id, at91_chip->wakeups);
return 0;
}
static int at91_gpio_resume(struct device *dev)
{
struct at91_gpio_chip *at91_chip = dev_get_drvdata(dev);
void __iomem *pio = at91_chip->regbase;
if (!at91_chip->wakeups)
clk_prepare_enable(at91_chip->clock);
writel_relaxed(at91_chip->wakeups, pio + PIO_IDR);
writel_relaxed(at91_chip->backups, pio + PIO_IER);
return 0;
}
static void gpio_irq_handler(struct irq_desc *desc)
{
struct irq_chip *chip = irq_desc_get_chip(desc);
struct gpio_chip *gpio_chip = irq_desc_get_handler_data(desc);
struct at91_gpio_chip *at91_gpio = gpiochip_get_data(gpio_chip);
void __iomem *pio = at91_gpio->regbase;
unsigned long isr;
int n;
chained_irq_enter(chip, desc);
for (;;) {
isr = readl_relaxed(pio + PIO_ISR) & readl_relaxed(pio + PIO_IMR);
if (!isr) {
if (!at91_gpio->next)
break;
at91_gpio = at91_gpio->next;
pio = at91_gpio->regbase;
gpio_chip = &at91_gpio->chip;
continue;
}
for_each_set_bit(n, &isr, BITS_PER_LONG)
generic_handle_domain_irq(gpio_chip->irq.domain, n);
}
chained_irq_exit(chip, desc);
}
static int at91_gpio_of_irq_setup(struct platform_device *pdev,
struct at91_gpio_chip *at91_gpio)
{
struct device *dev = &pdev->dev;
struct gpio_chip *gpiochip_prev = NULL;
struct at91_gpio_chip *prev = NULL;
struct irq_data *d = irq_get_irq_data(at91_gpio->pioc_virq);
struct irq_chip *gpio_irqchip;
struct gpio_irq_chip *girq;
int i;
gpio_irqchip = devm_kzalloc(dev, sizeof(*gpio_irqchip), GFP_KERNEL);
if (!gpio_irqchip)
return -ENOMEM;
at91_gpio->pioc_hwirq = irqd_to_hwirq(d);
gpio_irqchip->name = "GPIO";
gpio_irqchip->irq_request_resources = gpio_irq_request_resources;
gpio_irqchip->irq_release_resources = gpio_irq_release_resources;
gpio_irqchip->irq_ack = gpio_irq_ack;
gpio_irqchip->irq_disable = gpio_irq_mask;
gpio_irqchip->irq_mask = gpio_irq_mask;
gpio_irqchip->irq_unmask = gpio_irq_unmask;
gpio_irqchip->irq_set_wake = pm_ptr(gpio_irq_set_wake);
gpio_irqchip->irq_set_type = at91_gpio->ops->irq_type;
gpio_irqchip->flags = IRQCHIP_IMMUTABLE;
writel_relaxed(~0, at91_gpio->regbase + PIO_IDR);
girq = &at91_gpio->chip.irq;
gpio_irq_chip_set_chip(girq, gpio_irqchip);
girq->default_type = IRQ_TYPE_NONE;
girq->handler = handle_edge_irq;
gpiochip_prev = irq_get_handler_data(at91_gpio->pioc_virq);
if (!gpiochip_prev) {
girq->parent_handler = gpio_irq_handler;
girq->num_parents = 1;
girq->parents = devm_kcalloc(dev, girq->num_parents,
sizeof(*girq->parents),
GFP_KERNEL);
if (!girq->parents)
return -ENOMEM;
girq->parents[0] = at91_gpio->pioc_virq;
return 0;
}
prev = gpiochip_get_data(gpiochip_prev);
for (i = 0; i < 2; i++) {
if (prev->next) {
prev = prev->next;
} else {
prev->next = at91_gpio;
return 0;
}
}
return -EINVAL;
}
static const struct gpio_chip at91_gpio_template = {
.request = gpiochip_generic_request,
.free = gpiochip_generic_free,
.get_direction = at91_gpio_get_direction,
.direction_input = at91_gpio_direction_input,
.get = at91_gpio_get,
.direction_output = at91_gpio_direction_output,
.set = at91_gpio_set,
.set_multiple = at91_gpio_set_multiple,
.dbg_show = at91_gpio_dbg_show,
.can_sleep = false,
.ngpio = MAX_NB_GPIO_PER_BANK,
};
static const struct of_device_id at91_gpio_of_match[] = {
{ .compatible = "atmel,at91sam9x5-gpio", .data = &at91sam9x5_ops, },
{ .compatible = "atmel,at91rm9200-gpio", .data = &at91rm9200_ops },
{ .compatible = "microchip,sam9x60-gpio", .data = &sam9x60_ops },
{ }
};
static int at91_gpio_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct at91_gpio_chip *at91_chip = NULL;
struct gpio_chip *chip;
struct pinctrl_gpio_range *range;
int alias_idx;
int ret = 0;
int irq, i;
uint32_t ngpio;
char **names;
alias_idx = of_alias_get_id(np, "gpio");
if (alias_idx < 0)
return alias_idx;
BUG_ON(alias_idx >= ARRAY_SIZE(gpio_chips));
if (gpio_chips[alias_idx])
return dev_err_probe(dev, -EBUSY, "%d slot is occupied.\n", alias_idx);
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
at91_chip = devm_kzalloc(dev, sizeof(*at91_chip), GFP_KERNEL);
if (!at91_chip)
return -ENOMEM;
at91_chip->regbase = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(at91_chip->regbase))
return PTR_ERR(at91_chip->regbase);
at91_chip->ops = device_get_match_data(dev);
at91_chip->pioc_virq = irq;
at91_chip->clock = devm_clk_get_enabled(dev, NULL);
if (IS_ERR(at91_chip->clock))
return dev_err_probe(dev, PTR_ERR(at91_chip->clock), "failed to get clock, ignoring.\n");
at91_chip->chip = at91_gpio_template;
at91_chip->id = alias_idx;
chip = &at91_chip->chip;
chip->label = dev_name(dev);
chip->parent = dev;
chip->owner = THIS_MODULE;
chip->base = alias_idx * MAX_NB_GPIO_PER_BANK;
if (!of_property_read_u32(np, "#gpio-lines", &ngpio)) {
if (ngpio >= MAX_NB_GPIO_PER_BANK)
dev_err(dev, "at91_gpio.%d, gpio-nb >= %d failback to %d\n",
alias_idx, MAX_NB_GPIO_PER_BANK, MAX_NB_GPIO_PER_BANK);
else
chip->ngpio = ngpio;
}
names = devm_kasprintf_strarray(dev, "pio", chip->ngpio);
if (IS_ERR(names))
return PTR_ERR(names);
for (i = 0; i < chip->ngpio; i++)
strreplace(names[i], '-', alias_idx + 'A');
chip->names = (const char *const *)names;
range = &at91_chip->range;
range->name = chip->label;
range->id = alias_idx;
range->pin_base = range->base = range->id * MAX_NB_GPIO_PER_BANK;
range->npins = chip->ngpio;
range->gc = chip;
ret = at91_gpio_of_irq_setup(pdev, at91_chip);
if (ret)
return ret;
ret = gpiochip_add_data(chip, at91_chip);
if (ret)
return ret;
gpio_chips[alias_idx] = at91_chip;
platform_set_drvdata(pdev, at91_chip);
gpio_banks = max(gpio_banks, alias_idx + 1);
dev_info(dev, "at address %p\n", at91_chip->regbase);
return 0;
}
static DEFINE_NOIRQ_DEV_PM_OPS(at91_gpio_pm_ops, at91_gpio_suspend, at91_gpio_resume);
static struct platform_driver at91_gpio_driver = {
.driver = {
.name = "gpio-at91",
.of_match_table = at91_gpio_of_match,
.pm = pm_sleep_ptr(&at91_gpio_pm_ops),
},
.probe = at91_gpio_probe,
};
static struct platform_driver at91_pinctrl_driver = {
.driver = {
.name = "pinctrl-at91",
.of_match_table = at91_pinctrl_of_match,
},
.probe = at91_pinctrl_probe,
};
static struct platform_driver * const drivers[] = {
&at91_gpio_driver,
&at91_pinctrl_driver,
};
static int __init at91_pinctrl_init(void)
{
return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
}
arch_initcall(at91_pinctrl_init);
