| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jean-Christophe Plagniol-Villard | 7085 | 79.43% | 6 | 9.23% |
| Marek Roszko | 568 | 6.37% | 1 | 1.54% |
| Ludovic Desroches | 314 | 3.52% | 2 | 3.08% |
| Boris Brezillon | 263 | 2.95% | 7 | 10.77% |
| Alexander Stein | 171 | 1.92% | 6 | 9.23% |
| Alexandre Belloni | 96 | 1.08% | 5 | 7.69% |
| Richard Genoud | 64 | 0.72% | 1 | 1.54% |
| Pramod Gurav | 52 | 0.58% | 3 | 4.62% |
| David Dueck | 35 | 0.39% | 1 | 1.54% |
| Thierry Reding | 35 | 0.39% | 3 | 4.62% |
| Sherman Yin | 35 | 0.39% | 1 | 1.54% |
| Matthieu Crapet | 28 | 0.31% | 1 | 1.54% |
| Kees Cook | 26 | 0.29% | 1 | 1.54% |
| Ben Dooks | 26 | 0.29% | 1 | 1.54% |
| Wenyou Yang | 25 | 0.28% | 1 | 1.54% |
| Linus Walleij | 24 | 0.27% | 6 | 9.23% |
| Julia Lawall | 17 | 0.19% | 2 | 3.08% |
| Wolfram Sang | 11 | 0.12% | 1 | 1.54% |
| Masahiro Yamada | 9 | 0.10% | 1 | 1.54% |
| Wei Yongjun | 5 | 0.06% | 1 | 1.54% |
| Thomas Gleixner | 5 | 0.06% | 1 | 1.54% |
| Laxman Dewangan | 4 | 0.04% | 1 | 1.54% |
| Rob Herring | 3 | 0.03% | 1 | 1.54% |
| Laurent Pinchart | 3 | 0.03% | 1 | 1.54% |
| Axel Lin | 3 | 0.03% | 2 | 3.08% |
| Jiang Liu | 2 | 0.02% | 1 | 1.54% |
| Hans Wennborg | 2 | 0.02% | 1 | 1.54% |
| Baruch Siach | 2 | 0.02% | 1 | 1.54% |
| Jonas Gorski | 2 | 0.02% | 1 | 1.54% |
| Fabian Frederick | 2 | 0.02% | 1 | 1.54% |
| Marc Zyngier | 1 | 0.01% | 1 | 1.54% |
| Rickard Strandqvist | 1 | 0.01% | 1 | 1.54% |
| Arnd Bergmann | 1 | 0.01% | 1 | 1.54% |
| Total | 8920 | 65 |
/* * at91 pinctrl driver based on at91 pinmux core * * Copyright (C) 2011-2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> * * Under GPLv2 only */ #include <linux/clk.h> #include <linux/err.h> #include <linux/init.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/gpio/driver.h> #include <linux/pinctrl/machine.h> #include <linux/pinctrl/pinconf.h> #include <linux/pinctrl/pinctrl.h> #include <linux/pinctrl/pinmux.h> /* Since we request GPIOs from ourself */ #include <linux/pinctrl/consumer.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; /* Bank sharing same clock */ int pioc_hwirq; /* PIO bank interrupt identifier on AIC */ int pioc_virq; /* PIO bank Linux virtual interrupt */ int pioc_idx; /* PIO bank index */ void __iomem *regbase; /* PIO bank virtual address */ struct clk *clock; /* associated clock */ struct at91_pinctrl_mux_ops *ops; /* ops */ }; 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 DEBOUNCE (1 << 16) #define DEBOUNCE_VAL_SHIFT 17 #define DEBOUNCE_VAL (0x3fff << DEBOUNCE_VAL_SHIFT) /** * These defines will translated the dt binding settings to our internal * settings. They are not necessarily the same value as the register setting. * The actual drive strength current of low, medium and high must be looked up * from the corresponding device datasheet. This value is different for pins * that are even in the same banks. It is also dependent on VCC. * DRIVE_STRENGTH_DEFAULT is just a placeholder to avoid changing the drive * strength when there is no dt config for it. */ #define DRIVE_STRENGTH_DEFAULT (0 << DRIVE_STRENGTH_SHIFT) #define DRIVE_STRENGTH_LOW (1 << DRIVE_STRENGTH_SHIFT) #define DRIVE_STRENGTH_MED (2 << DRIVE_STRENGTH_SHIFT) #define DRIVE_STRENGTH_HI (3 << DRIVE_STRENGTH_SHIFT) /** * struct at91_pmx_func - describes AT91 pinmux functions * @name: the name of this specific function * @groups: corresponding pin groups * @ngroups: the number of groups */ 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 - describes an At91 pin mux * @bank: the bank of the pin * @pin: the pin number in the @bank * @mux: the mux mode : gpio or periph_x of the pin i.e. alternate function. * @conf: the configuration of the pin: PULL_UP, MULTIDRIVE etc... */ struct at91_pmx_pin { uint32_t bank; uint32_t pin; enum at91_mux mux; unsigned long conf; }; /** * struct at91_pin_group - describes an At91 pin group * @name: the name of this specific pin group * @pins_conf: the mux mode for each pin in this group. The size of this * array is the same as pins. * @pins: an array of discrete physical pins used in this group, taken * from the driver-local pin enumeration space * @npins: the number of pins in this group array, i.e. the number of * elements in .pins so we can iterate over that array */ struct at91_pin_group { const char *name; struct at91_pmx_pin *pins_conf; unsigned int *pins; unsigned npins; }; /** * struct at91_pinctrl_mux_ops - describes an AT91 mux ops group * on new IP with support for periph C and D the way to mux in * periph A and B has changed * So provide the right call back * if not present means the IP does not support it * @get_periph: return the periph mode configured * @mux_A_periph: mux as periph A * @mux_B_periph: mux as periph B * @mux_C_periph: mux as periph C * @mux_D_periph: mux as periph D * @get_deglitch: get deglitch status * @set_deglitch: enable/disable deglitch * @get_debounce: get debounce status * @set_debounce: enable/disable debounce * @get_pulldown: get pulldown status * @set_pulldown: enable/disable pulldown * @get_schmitt_trig: get schmitt trigger status * @disable_schmitt_trig: disable schmitt trigger * @irq_type: return irq type */ 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); /* irq */ 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; 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; /* * first find the group of this node and check if we need to create * config maps for pins */ 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; /* create mux map */ 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); /* create config map */ 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 the shift value for a pin for "two bit" per pin registers, * i.e. drive strength */ 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) { /* drive strength is split between two registers * with two bits per pin */ return (pin >= MAX_NB_GPIO_PER_BANK/2) ? SAMA5D3_PIO_DRIVER2 : SAMA5D3_PIO_DRIVER1; } static unsigned at91sam9x5_get_drive_register(unsigned int pin) { /* drive strength is split between two registers * with two bits per 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); /* SAMA5 strength is 1:1 with our defines, * except 0 is equivalent to low per datasheet */ if (!tmp) tmp = DRIVE_STRENGTH_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); /* strength is inverse in SAM9x5s hardware with the pinctrl defines * hardware: 0 = hi, 1 = med, 2 = low, 3 = rsvd */ tmp = DRIVE_STRENGTH_HI - tmp; return tmp; } 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) { /* do nothing if setting is zero */ if (!setting) return; /* strength is 1 to 1 with setting for SAMA5 */ 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) { /* do nothing if setting is zero */ if (!setting) return; /* strength is inverse on SAM9x5s with our defines * 0 = hi, 1 = med, 2 = low, 3 = rsvd */ setting = DRIVE_STRENGTH_HI - setting; set_drive_strength(pio + at91sam9x5_get_drive_register(pin), pin, setting); } static 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 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 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; /* check if it's a valid config */ 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); /* first check that all the pins of the group are valid with a valid * parameter */ 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); /* Set the pin to some default state, GPIO is usually default */ } 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 (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); } /* for each config */ 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) do { \ if ((config & mask) == flag) { \ if (num_conf) \ seq_puts(s, "|"); \ seq_puts(s, #flag); \ 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_LOW); DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_MED); DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_HI); 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); /* Initialise group */ grp->name = np->name; /* * the binding format is atmel,pins = <bank pin mux CONFIG ...>, * do sanity check and calculate pins number */ list = of_get_property(np, "atmel,pins", &size); /* we do not check return since it's safe node passed down */ 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 device_node *child; 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]; /* Initialise function */ 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(np, child) { func->groups[i] = child->name; grp = &info->groups[grp_index++]; ret = at91_pinctrl_parse_groups(child, grp, info, i++); if (ret) { of_node_put(child); 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 }, { /* sentinel */ } }; static int at91_pinctrl_probe_dt(struct platform_device *pdev, struct at91_pinctrl *info) { int ret = 0; int i, j; uint32_t *tmp; struct device_node *np = pdev->dev.of_node; struct device_node *child; if (!np) return -ENODEV; info->dev = &pdev->dev; info->ops = (struct at91_pinctrl_mux_ops *) of_match_device(at91_pinctrl_of_match, &pdev->dev)->data; at91_pinctrl_child_count(info, np); if (gpio_banks < 1) { dev_err(&pdev->dev, "you need to specify at least one gpio-controller\n"); return -EINVAL; } ret = at91_pinctrl_mux_mask(info, np); if (ret) return ret; dev_dbg(&pdev->dev, "nmux = %d\n", info->nmux); dev_dbg(&pdev->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(&pdev->dev, "%d:%d\t0x%x\n", i, j, tmp[0]); } } dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions); dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups); info->functions = devm_kcalloc(&pdev->dev, info->nfunctions, sizeof(struct at91_pmx_func), GFP_KERNEL); if (!info->functions) return -ENOMEM; info->groups = devm_kcalloc(&pdev->dev, info->ngroups, sizeof(struct at91_pin_group), GFP_KERNEL); if (!info->groups) return -ENOMEM; dev_dbg(&pdev->dev, "nbanks = %d\n", gpio_banks); dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions); dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups); i = 0; for_each_child_of_node(np, child) { if (of_device_is_compatible(child, gpio_compat)) continue; ret = at91_pinctrl_parse_functions(child, info, i++); if (ret) { dev_err(&pdev->dev, "failed to parse function\n"); of_node_put(child); return ret; } } return 0; } static int at91_pinctrl_probe(struct platform_device *pdev) { struct at91_pinctrl *info; struct pinctrl_pin_desc *pdesc; int ret, i, j, k, ngpio_chips_enabled = 0; info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM; ret = at91_pinctrl_probe_dt(pdev, info); if (ret) return ret; /* * We need all the GPIO drivers to probe FIRST, or we will not be able * to obtain references to the struct gpio_chip * for them, and we * need this to proceed. */ for (i = 0; i < gpio_banks; i++) if (gpio_chips[i]) ngpio_chips_enabled++; if (ngpio_chips_enabled < info->nactive_banks) { dev_warn(&pdev->dev, "All GPIO chips are not registered yet (%d/%d)\n", ngpio_chips_enabled, info->nactive_banks); devm_kfree(&pdev->dev, info); return -EPROBE_DEFER; } at91_pinctrl_desc.name = dev_name(&pdev->dev); at91_pinctrl_desc.npins = gpio_banks * MAX_NB_GPIO_PER_BANK; at91_pinctrl_desc.pins = pdesc = devm_kcalloc(&pdev->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++) { for (j = 0; j < MAX_NB_GPIO_PER_BANK; j++, k++) { pdesc->number = k; pdesc->name = kasprintf(GFP_KERNEL, "pio%c%d", i + 'A', j); pdesc++; } } platform_set_drvdata(pdev, info); info->pctl = devm_pinctrl_register(&pdev->dev, &at91_pinctrl_desc, info); if (IS_ERR(info->pctl)) { dev_err(&pdev->dev, "could not register AT91 pinctrl driver\n"); return PTR_ERR(info->pctl); } /* We will handle a range of GPIO pins */ for (i = 0; i < gpio_banks; i++) if (gpio_chips[i]) pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range); dev_info(&pdev->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); return !(osr & mask); } 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 void at91_gpio_set(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)); } static void 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)) /* Mask additionally to ngpio as not all GPIO controllers have 32 pins */ 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); } 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; for (i = 0; i < chip->ngpio; i++) { unsigned mask = pin_to_mask(i); const char *gpio_label; gpio_label = gpiochip_is_requested(chip, i); if (!gpio_label) continue; 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 /* Several AIC controller irqs are dispatched through this GPIO handler. * To use any AT91_PIN_* as an externally triggered IRQ, first call * at91_set_gpio_input() then maybe enable its glitch filter. * Then just request_irq() with the pin ID; it works like any ARM IRQ * handler. * First implementation always triggers on rising and falling edges * whereas the newer PIO3 can be additionally configured to trigger on * level, edge with any polarity. * * Alternatively, certain pins may be used directly as IRQ0..IRQ6 after * configuring them with at91_set_a_periph() or at91_set_b_periph(). * IRQ0..IRQ6 should be configurable, e.g. level vs edge triggering. */ 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; 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; 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; } } /* Alternate irq type for PIO3 support */ 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: /* * disable additional interrupt modes: * fall back to default behavior */ 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; } /* enable additional interrupt modes */ writel_relaxed(mask, pio + PIO_AIMER); return 0; } static void gpio_irq_ack(struct irq_data *d) { /* the interrupt is already cleared before by reading ISR */ } #ifdef CONFIG_PM static u32 wakeups[MAX_GPIO_BANKS]; static u32 backups[MAX_GPIO_BANKS]; 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 bank = at91_gpio->pioc_idx; unsigned mask = 1 << d->hwirq; if (unlikely(bank >= MAX_GPIO_BANKS)) return -EINVAL; if (state) wakeups[bank] |= mask; else wakeups[bank] &= ~mask; irq_set_irq_wake(at91_gpio->pioc_virq, state); return 0; } void at91_pinctrl_gpio_suspend(void) { int i; for (i = 0; i < gpio_banks; i++) { void __iomem *pio; if (!gpio_chips[i]) continue; pio = gpio_chips[i]->regbase; backups[i] = readl_relaxed(pio + PIO_IMR); writel_relaxed(backups[i], pio + PIO_IDR); writel_relaxed(wakeups[i], pio + PIO_IER); if (!wakeups[i]) clk_disable_unprepare(gpio_chips[i]->clock); else printk(KERN_DEBUG "GPIO-%c may wake for %08x\n", 'A'+i, wakeups[i]); } } void at91_pinctrl_gpio_resume(void) { int i; for (i = 0; i < gpio_banks; i++) { void __iomem *pio; if (!gpio_chips[i]) continue; pio = gpio_chips[i]->regbase; if (!wakeups[i]) clk_prepare_enable(gpio_chips[i]->clock); writel_relaxed(wakeups[i], pio + PIO_IDR); writel_relaxed(backups[i], pio + PIO_IER); } } #else #define gpio_irq_set_wake NULL #endif /* CONFIG_PM */ 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 (;;) { /* Reading ISR acks pending (edge triggered) GPIO interrupts. * When there are none pending, we're finished unless we need * to process multiple banks (like ID_PIOCDE on sam9263). */ 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_irq(irq_find_mapping( gpio_chip->irq.domain, n)); } } chained_irq_exit(chip, desc); /* now it may re-trigger */ } static int at91_gpio_of_irq_setup(struct platform_device *pdev, struct at91_gpio_chip *at91_gpio) { 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; int ret, i; gpio_irqchip = devm_kzalloc(&pdev->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_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 = gpio_irq_set_wake, gpio_irqchip->irq_set_type = at91_gpio->ops->irq_type; /* Disable irqs of this PIO controller */ writel_relaxed(~0, at91_gpio->regbase + PIO_IDR); /* * Let the generic code handle this edge IRQ, the the chained * handler will perform the actual work of handling the parent * interrupt. */ ret = gpiochip_irqchip_add(&at91_gpio->chip, gpio_irqchip, 0, handle_edge_irq, IRQ_TYPE_NONE); if (ret) { dev_err(&pdev->dev, "at91_gpio.%d: Couldn't add irqchip to gpiochip.\n", at91_gpio->pioc_idx); return ret; } /* The top level handler handles one bank of GPIOs, except * on some SoC it can handle up to three... * We only set up the handler for the first of the list. */ gpiochip_prev = irq_get_handler_data(at91_gpio->pioc_virq); if (!gpiochip_prev) { /* Then register the chain on the parent IRQ */ gpiochip_set_chained_irqchip(&at91_gpio->chip, gpio_irqchip, at91_gpio->pioc_virq, gpio_irq_handler); return 0; } prev = gpiochip_get_data(gpiochip_prev); /* we can only have 2 banks before */ for (i = 0; i < 2; i++) { if (prev->next) { prev = prev->next; } else { prev->next = at91_gpio; return 0; } } return -EINVAL; } /* This structure is replicated for each GPIO block allocated at probe time */ 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 }, { /* sentinel */ } }; static int at91_gpio_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; struct resource *res; struct at91_gpio_chip *at91_chip = NULL; struct gpio_chip *chip; struct pinctrl_gpio_range *range; int ret = 0; int irq, i; int alias_idx = of_alias_get_id(np, "gpio"); uint32_t ngpio; char **names; BUG_ON(alias_idx >= ARRAY_SIZE(gpio_chips)); if (gpio_chips[alias_idx]) { ret = -EBUSY; goto err; } irq = platform_get_irq(pdev, 0); if (irq < 0) { ret = irq; goto err; } at91_chip = devm_kzalloc(&pdev->dev, sizeof(*at91_chip), GFP_KERNEL); if (!at91_chip) { ret = -ENOMEM; goto err; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); at91_chip->regbase = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(at91_chip->regbase)) { ret = PTR_ERR(at91_chip->regbase); goto err; } at91_chip->ops = (struct at91_pinctrl_mux_ops *) of_match_device(at91_gpio_of_match, &pdev->dev)->data; at91_chip->pioc_virq = irq; at91_chip->pioc_idx = alias_idx; at91_chip->clock = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(at91_chip->clock)) { dev_err(&pdev->dev, "failed to get clock, ignoring.\n"); ret = PTR_ERR(at91_chip->clock); goto err; } ret = clk_prepare_enable(at91_chip->clock); if (ret) { dev_err(&pdev->dev, "failed to prepare and enable clock, ignoring.\n"); goto clk_enable_err; } at91_chip->chip = at91_gpio_template; chip = &at91_chip->chip; chip->of_node = np; chip->label = dev_name(&pdev->dev); chip->parent = &pdev->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) pr_err("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_kcalloc(&pdev->dev, chip->ngpio, sizeof(char *), GFP_KERNEL); if (!names) { ret = -ENOMEM; goto clk_enable_err; } for (i = 0; i < chip->ngpio; i++) names[i] = kasprintf(GFP_KERNEL, "pio%c%d", alias_idx + 'A', i); 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 = gpiochip_add_data(chip, at91_chip); if (ret) goto gpiochip_add_err; gpio_chips[alias_idx] = at91_chip; gpio_banks = max(gpio_banks, alias_idx + 1); ret = at91_gpio_of_irq_setup(pdev, at91_chip); if (ret) goto irq_setup_err; dev_info(&pdev->dev, "at address %p\n", at91_chip->regbase); return 0; irq_setup_err: gpiochip_remove(chip); gpiochip_add_err: clk_enable_err: clk_disable_unprepare(at91_chip->clock); err: dev_err(&pdev->dev, "Failure %i for GPIO %i\n", ret, alias_idx); return ret; } static struct platform_driver at91_gpio_driver = { .driver = { .name = "gpio-at91", .of_match_table = at91_gpio_of_match, }, .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);
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