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path: root/drivers/pinctrl/sunplus/sppctl.c
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Diffstat (limited to 'drivers/pinctrl/sunplus/sppctl.c')
-rw-r--r--drivers/pinctrl/sunplus/sppctl.c1132
1 files changed, 1132 insertions, 0 deletions
diff --git a/drivers/pinctrl/sunplus/sppctl.c b/drivers/pinctrl/sunplus/sppctl.c
new file mode 100644
index 000000000..6b24fa0e6
--- /dev/null
+++ b/drivers/pinctrl/sunplus/sppctl.c
@@ -0,0 +1,1132 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * SP7021 Pin Controller Driver.
+ * Copyright (C) Sunplus Tech / Tibbo Tech.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio/driver.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/overflow.h>
+#include <linux/platform_device.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinmux.h>
+
+#include <dt-bindings/pinctrl/sppctl-sp7021.h>
+
+#include "../core.h"
+#include "../pinctrl-utils.h"
+
+#include "sppctl.h"
+
+struct sppctl_gpio_chip {
+ void __iomem *gpioxt_base; /* MASTER, OE, OUT, IN, I_INV, O_INV, OD */
+ void __iomem *first_base; /* GPIO_FIRST */
+
+ struct gpio_chip chip;
+ spinlock_t lock; /* lock for accessing OE register */
+};
+
+static inline u32 sppctl_first_readl(struct sppctl_gpio_chip *spp_gchip, u32 off)
+{
+ return readl(spp_gchip->first_base + SPPCTL_GPIO_OFF_FIRST + off);
+}
+
+static inline void sppctl_first_writel(struct sppctl_gpio_chip *spp_gchip, u32 val, u32 off)
+{
+ writel(val, spp_gchip->first_base + SPPCTL_GPIO_OFF_FIRST + off);
+}
+
+static inline u32 sppctl_gpio_master_readl(struct sppctl_gpio_chip *spp_gchip, u32 off)
+{
+ return readl(spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_MASTER + off);
+}
+
+static inline void sppctl_gpio_master_writel(struct sppctl_gpio_chip *spp_gchip, u32 val,
+ u32 off)
+{
+ writel(val, spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_MASTER + off);
+}
+
+static inline u32 sppctl_gpio_oe_readl(struct sppctl_gpio_chip *spp_gchip, u32 off)
+{
+ return readl(spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OE + off);
+}
+
+static inline void sppctl_gpio_oe_writel(struct sppctl_gpio_chip *spp_gchip, u32 val, u32 off)
+{
+ writel(val, spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OE + off);
+}
+
+static inline void sppctl_gpio_out_writel(struct sppctl_gpio_chip *spp_gchip, u32 val, u32 off)
+{
+ writel(val, spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OUT + off);
+}
+
+static inline u32 sppctl_gpio_in_readl(struct sppctl_gpio_chip *spp_gchip, u32 off)
+{
+ return readl(spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_IN + off);
+}
+
+static inline u32 sppctl_gpio_iinv_readl(struct sppctl_gpio_chip *spp_gchip, u32 off)
+{
+ return readl(spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_IINV + off);
+}
+
+static inline void sppctl_gpio_iinv_writel(struct sppctl_gpio_chip *spp_gchip, u32 val,
+ u32 off)
+{
+ writel(val, spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_IINV + off);
+}
+
+static inline u32 sppctl_gpio_oinv_readl(struct sppctl_gpio_chip *spp_gchip, u32 off)
+{
+ return readl(spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OINV + off);
+}
+
+static inline void sppctl_gpio_oinv_writel(struct sppctl_gpio_chip *spp_gchip, u32 val,
+ u32 off)
+{
+ writel(val, spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OINV + off);
+}
+
+static inline u32 sppctl_gpio_od_readl(struct sppctl_gpio_chip *spp_gchip, u32 off)
+{
+ return readl(spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OD + off);
+}
+
+static inline void sppctl_gpio_od_writel(struct sppctl_gpio_chip *spp_gchip, u32 val, u32 off)
+{
+ writel(val, spp_gchip->gpioxt_base + SPPCTL_GPIO_OFF_OD + off);
+}
+
+static inline u32 sppctl_get_reg_and_bit_offset(unsigned int offset, u32 *reg_off)
+{
+ u32 bit_off;
+
+ /* Each register has 32 bits. */
+ *reg_off = (offset / 32) * 4;
+ bit_off = offset % 32;
+
+ return bit_off;
+}
+
+static inline u32 sppctl_get_moon_reg_and_bit_offset(unsigned int offset, u32 *reg_off)
+{
+ u32 bit_off;
+
+ /*
+ * Each MOON register has 32 bits. Upper 16-bit word are mask-fields.
+ * The lower 16-bit word are the control-fields. The corresponding
+ * bits in mask-field should be set then you can write something to
+ * control-field.
+ */
+ *reg_off = (offset / 16) * 4;
+ bit_off = offset % 16;
+
+ return bit_off;
+}
+
+static inline u32 sppctl_prep_moon_reg_and_offset(unsigned int offset, u32 *reg_off, int val)
+{
+ u32 bit_off;
+
+ bit_off = sppctl_get_moon_reg_and_bit_offset(offset, reg_off);
+ if (val)
+ return SPPCTL_SET_MOON_REG_BIT(bit_off);
+ else
+ return SPPCTL_CLR_MOON_REG_BIT(bit_off);
+}
+
+/**
+ * sppctl_func_set() - Set pin of fully-pinmux function.
+ *
+ * Mask-fields and control-fields of fully-pinmux function of SP7021 are
+ * arranged as shown below:
+ *
+ * func# | register | mask-field | control-field
+ * -------+----------+--------------+---------------
+ * 0 | base[0] | (22 : 16) | ( 6 : 0)
+ * 1 | base[0] | (30 : 24) | (14 : 8)
+ * 2 | base[1] | (22 : 16) | ( 6 : 0)
+ * 3 | baeg[1] | (30 : 24) | (14 : 8)
+ * : | : | : | :
+ *
+ * where mask-fields are used to protect control-fields from write-in
+ * accidentally. Set the corresponding bits in the mask-field before
+ * you write a value into a control-field.
+ *
+ * Control-fields are used to set where the function pin is going to
+ * be routed to.
+ *
+ * Note that mask-fields and control-fields of even number of 'func'
+ * are located at bits (22:16) and (6:0), while odd number of 'func's
+ * are located at bits (30:24) and (14:8).
+ */
+static void sppctl_func_set(struct sppctl_pdata *pctl, u8 func, u8 val)
+{
+ u32 reg, offset;
+
+ /*
+ * Note that upper 16-bit word are mask-fields and lower 16-bit
+ * word are the control-fields. Set corresponding bits in mask-
+ * field before write to a control-field.
+ */
+ reg = SPPCTL_FULLY_PINMUX_MASK_MASK | val;
+
+ /*
+ * MUXF_L2SW_CLK_OUT is the first fully-pinmux pin
+ * and its register offset is 0.
+ */
+ func -= MUXF_L2SW_CLK_OUT;
+
+ /*
+ * Check if 'func' is an odd number or not. Mask and control-
+ * fields of odd number 'func' is located at upper portion of
+ * a register. Extra shift is needed.
+ */
+ if (func & BIT(0))
+ reg <<= SPPCTL_FULLY_PINMUX_UPPER_SHIFT;
+
+ /* Convert func# to register offset w.r.t. base register. */
+ offset = func * 2;
+ offset &= GENMASK(31, 2);
+
+ writel(reg, pctl->moon2_base + offset);
+}
+
+/**
+ * sppctl_gmx_set() - Set pin of group-pinmux.
+ *
+ * Mask-fields and control-fields of group-pinmux function of SP7021 are
+ * arranged as shown below:
+ *
+ * register | mask-fields | control-fields
+ * ----------+--------------+----------------
+ * base[0] | (31 : 16) | (15 : 0)
+ * base[1] | (31 : 24) | (15 : 0)
+ * base[2] | (31 : 24) | (15 : 0)
+ * : | : | :
+ *
+ * where mask-fields are used to protect control-fields from write-in
+ * accidentally. Set the corresponding bits in the mask-field before
+ * you write a value into a control-field.
+ *
+ * Control-fields are used to set where the function pin is going to
+ * be routed to. A control-field consists of one or more bits.
+ */
+static void sppctl_gmx_set(struct sppctl_pdata *pctl, u8 reg_off, u8 bit_off, u8 bit_sz,
+ u8 val)
+{
+ u32 mask, reg;
+
+ /*
+ * Note that upper 16-bit word are mask-fields and lower 16-bit
+ * word are the control-fields. Set corresponding bits in mask-
+ * field before write to a control-field.
+ */
+ mask = GENMASK(bit_sz - 1, 0) << SPPCTL_MOON_REG_MASK_SHIFT;
+ reg = (mask | val) << bit_off;
+
+ writel(reg, pctl->moon1_base + reg_off * 4);
+}
+
+/**
+ * sppctl_first_get() - get bit of FIRST register.
+ *
+ * There are 4 FIRST registers. Each has 32 control-bits.
+ * Totally, there are 4 * 32 = 128 control-bits.
+ * Control-bits are arranged as shown below:
+ *
+ * registers | control-bits
+ * -----------+--------------
+ * first[0] | (31 : 0)
+ * first[1] | (63 : 32)
+ * first[2] | (95 : 64)
+ * first[3] | (127 : 96)
+ *
+ * Each control-bit sets type of a GPIO pin.
+ * 0: a fully-pinmux pin
+ * 1: a GPIO or IOP pin
+ */
+static int sppctl_first_get(struct gpio_chip *chip, unsigned int offset)
+{
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ u32 reg_off, bit_off, reg;
+
+ bit_off = sppctl_get_reg_and_bit_offset(offset, &reg_off);
+ reg = sppctl_first_readl(spp_gchip, reg_off);
+
+ return (reg & BIT(bit_off)) ? 1 : 0;
+}
+
+/**
+ * sppctl_master_get() - get bit of MASTER register.
+ *
+ * There are 8 MASTER registers. Each has 16 mask-bits and 16 control-bits.
+ * Upper 16-bit of MASTER registers are mask-bits while lower 16-bit are
+ * control-bits. Totally, there are 128 mask-bits and 128 control-bits.
+ * They are arranged as shown below:
+ *
+ * register | mask-bits | control-bits
+ * -----------+-------------+--------------
+ * master[0] | (15 : 0) | (15 : 0)
+ * master[1] | (31 : 16) | (31 : 16)
+ * master[2] | (47 : 32) | (47 : 32)
+ * : | : | :
+ * master[7] | (127 : 112) | (127 : 112)
+ *
+ * where mask-bits are used to protect control-bits from write-in
+ * accidentally. Set the corresponding mask-bit before you write
+ * a value into a control-bit.
+ *
+ * Each control-bit sets type of a GPIO pin when FIRST bit is 1.
+ * 0: a IOP pin
+ * 1: a GPIO pin
+ */
+static int sppctl_master_get(struct gpio_chip *chip, unsigned int offset)
+{
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ u32 reg_off, bit_off, reg;
+
+ bit_off = sppctl_get_moon_reg_and_bit_offset(offset, &reg_off);
+ reg = sppctl_gpio_master_readl(spp_gchip, reg_off);
+ return (reg & BIT(bit_off)) ? 1 : 0;
+}
+
+static void sppctl_first_master_set(struct gpio_chip *chip, unsigned int offset,
+ enum mux_first_reg first, enum mux_master_reg master)
+{
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ u32 reg_off, bit_off, reg;
+ enum mux_first_reg val;
+
+ /* FIRST register */
+ if (first != mux_f_keep) {
+ bit_off = sppctl_get_reg_and_bit_offset(offset, &reg_off);
+ reg = sppctl_first_readl(spp_gchip, reg_off);
+ val = (reg & BIT(bit_off)) ? mux_f_gpio : mux_f_mux;
+
+ if (first != val)
+ switch (first) {
+ case mux_f_gpio:
+ reg |= BIT(bit_off);
+ sppctl_first_writel(spp_gchip, reg, reg_off);
+ break;
+
+ case mux_f_mux:
+ reg &= ~BIT(bit_off);
+ sppctl_first_writel(spp_gchip, reg, reg_off);
+ break;
+
+ case mux_f_keep:
+ break;
+ }
+ }
+
+ /* MASTER register */
+ if (master != mux_m_keep) {
+ reg = sppctl_prep_moon_reg_and_offset(offset, &reg_off, (master == mux_m_gpio));
+ sppctl_gpio_master_writel(spp_gchip, reg, reg_off);
+ }
+}
+
+static void sppctl_gpio_input_inv_set(struct gpio_chip *chip, unsigned int offset)
+{
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ u32 reg_off, reg;
+
+ reg = sppctl_prep_moon_reg_and_offset(offset, &reg_off, 1);
+ sppctl_gpio_iinv_writel(spp_gchip, reg, reg_off);
+}
+
+static void sppctl_gpio_output_inv_set(struct gpio_chip *chip, unsigned int offset)
+{
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ u32 reg_off, reg;
+
+ reg = sppctl_prep_moon_reg_and_offset(offset, &reg_off, 1);
+ sppctl_gpio_oinv_writel(spp_gchip, reg, reg_off);
+}
+
+static int sppctl_gpio_output_od_get(struct gpio_chip *chip, unsigned int offset)
+{
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ u32 reg_off, bit_off, reg;
+
+ bit_off = sppctl_get_moon_reg_and_bit_offset(offset, &reg_off);
+ reg = sppctl_gpio_od_readl(spp_gchip, reg_off);
+
+ return (reg & BIT(bit_off)) ? 1 : 0;
+}
+
+static void sppctl_gpio_output_od_set(struct gpio_chip *chip, unsigned int offset,
+ unsigned int val)
+{
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ u32 reg_off, reg;
+
+ reg = sppctl_prep_moon_reg_and_offset(offset, &reg_off, val);
+ sppctl_gpio_od_writel(spp_gchip, reg, reg_off);
+}
+
+static int sppctl_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
+{
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ u32 reg_off, bit_off, reg;
+
+ bit_off = sppctl_get_moon_reg_and_bit_offset(offset, &reg_off);
+ reg = sppctl_gpio_oe_readl(spp_gchip, reg_off);
+
+ return (reg & BIT(bit_off)) ? 0 : 1;
+}
+
+static int sppctl_gpio_inv_get(struct gpio_chip *chip, unsigned int offset)
+{
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ u32 reg_off, bit_off, reg;
+ unsigned long flags;
+
+ bit_off = sppctl_get_moon_reg_and_bit_offset(offset, &reg_off);
+
+ spin_lock_irqsave(&spp_gchip->lock, flags);
+
+ if (sppctl_gpio_get_direction(chip, offset))
+ reg = sppctl_gpio_iinv_readl(spp_gchip, reg_off);
+ else
+ reg = sppctl_gpio_oinv_readl(spp_gchip, reg_off);
+
+ spin_unlock_irqrestore(&spp_gchip->lock, flags);
+
+ return (reg & BIT(bit_off)) ? 1 : 0;
+}
+
+static int sppctl_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
+{
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ unsigned long flags;
+ u32 reg_off, reg;
+
+ reg = sppctl_prep_moon_reg_and_offset(offset, &reg_off, 0);
+
+ spin_lock_irqsave(&spp_gchip->lock, flags);
+
+ sppctl_gpio_oe_writel(spp_gchip, reg, reg_off);
+
+ spin_unlock_irqrestore(&spp_gchip->lock, flags);
+ return 0;
+}
+
+static int sppctl_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, int val)
+{
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ unsigned long flags;
+ u32 reg_off, reg;
+
+ reg = sppctl_prep_moon_reg_and_offset(offset, &reg_off, 1);
+
+ spin_lock_irqsave(&spp_gchip->lock, flags);
+
+ sppctl_gpio_oe_writel(spp_gchip, reg, reg_off);
+
+ if (val < 0) {
+ spin_unlock_irqrestore(&spp_gchip->lock, flags);
+ return 0;
+ }
+
+ reg = sppctl_prep_moon_reg_and_offset(offset, &reg_off, val);
+ sppctl_gpio_out_writel(spp_gchip, reg, reg_off);
+
+ spin_unlock_irqrestore(&spp_gchip->lock, flags);
+ return 0;
+}
+
+static int sppctl_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ u32 reg_off, bit_off, reg;
+
+ bit_off = sppctl_get_reg_and_bit_offset(offset, &reg_off);
+ reg = sppctl_gpio_in_readl(spp_gchip, reg_off);
+
+ return (reg & BIT(bit_off)) ? 1 : 0;
+}
+
+static void sppctl_gpio_set(struct gpio_chip *chip, unsigned int offset, int val)
+{
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ u32 reg_off, reg;
+
+ reg = sppctl_prep_moon_reg_and_offset(offset, &reg_off, val);
+ sppctl_gpio_out_writel(spp_gchip, reg, reg_off);
+}
+
+static int sppctl_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
+ unsigned long config)
+{
+ enum pin_config_param param = pinconf_to_config_param(config);
+ struct sppctl_gpio_chip *spp_gchip = gpiochip_get_data(chip);
+ u32 reg_off, reg;
+
+ switch (param) {
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ reg = sppctl_prep_moon_reg_and_offset(offset, &reg_off, 1);
+ sppctl_gpio_od_writel(spp_gchip, reg, reg_off);
+ break;
+
+ case PIN_CONFIG_INPUT_ENABLE:
+ break;
+
+ case PIN_CONFIG_OUTPUT:
+ return sppctl_gpio_direction_output(chip, offset, 0);
+
+ case PIN_CONFIG_PERSIST_STATE:
+ return -ENOTSUPP;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void sppctl_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
+{
+ const char *label;
+ int i;
+
+ for (i = 0; i < chip->ngpio; i++) {
+ label = gpiochip_is_requested(chip, i);
+ if (!label)
+ label = "";
+
+ seq_printf(s, " gpio-%03d (%-16.16s | %-16.16s)", i + chip->base,
+ chip->names[i], label);
+ seq_printf(s, " %c", sppctl_gpio_get_direction(chip, i) ? 'I' : 'O');
+ seq_printf(s, ":%d", sppctl_gpio_get(chip, i));
+ seq_printf(s, " %s", sppctl_first_get(chip, i) ? "gpi" : "mux");
+ seq_printf(s, " %s", sppctl_master_get(chip, i) ? "gpi" : "iop");
+ seq_printf(s, " %s", sppctl_gpio_inv_get(chip, i) ? "inv" : " ");
+ seq_printf(s, " %s", sppctl_gpio_output_od_get(chip, i) ? "oDr" : "");
+ seq_puts(s, "\n");
+ }
+}
+#endif
+
+static int sppctl_gpio_new(struct platform_device *pdev, struct sppctl_pdata *pctl)
+{
+ struct sppctl_gpio_chip *spp_gchip;
+ struct gpio_chip *gchip;
+ int err;
+
+ spp_gchip = devm_kzalloc(&pdev->dev, sizeof(*spp_gchip), GFP_KERNEL);
+ if (!spp_gchip)
+ return -ENOMEM;
+ pctl->spp_gchip = spp_gchip;
+
+ spp_gchip->gpioxt_base = pctl->gpioxt_base;
+ spp_gchip->first_base = pctl->first_base;
+ spin_lock_init(&spp_gchip->lock);
+
+ gchip = &spp_gchip->chip;
+ gchip->label = SPPCTL_MODULE_NAME;
+ gchip->parent = &pdev->dev;
+ gchip->owner = THIS_MODULE;
+ gchip->request = gpiochip_generic_request;
+ gchip->free = gpiochip_generic_free;
+ gchip->get_direction = sppctl_gpio_get_direction;
+ gchip->direction_input = sppctl_gpio_direction_input;
+ gchip->direction_output = sppctl_gpio_direction_output;
+ gchip->get = sppctl_gpio_get;
+ gchip->set = sppctl_gpio_set;
+ gchip->set_config = sppctl_gpio_set_config;
+#ifdef CONFIG_DEBUG_FS
+ gchip->dbg_show = sppctl_gpio_dbg_show;
+#endif
+ gchip->base = -1;
+ gchip->ngpio = sppctl_gpio_list_sz;
+ gchip->names = sppctl_gpio_list_s;
+ gchip->of_gpio_n_cells = 2;
+
+ pctl->pctl_grange.npins = gchip->ngpio;
+ pctl->pctl_grange.name = gchip->label;
+ pctl->pctl_grange.gc = gchip;
+
+ err = devm_gpiochip_add_data(&pdev->dev, gchip, spp_gchip);
+ if (err)
+ return dev_err_probe(&pdev->dev, err, "Failed to add gpiochip!\n");
+
+ return 0;
+}
+
+static int sppctl_pin_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *config)
+{
+ struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev);
+ unsigned int param = pinconf_to_config_param(*config);
+ unsigned int arg;
+
+ switch (param) {
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ if (!sppctl_gpio_output_od_get(&pctl->spp_gchip->chip, pin))
+ return -EINVAL;
+ arg = 0;
+ break;
+
+ case PIN_CONFIG_OUTPUT:
+ if (!sppctl_first_get(&pctl->spp_gchip->chip, pin))
+ return -EINVAL;
+ if (!sppctl_master_get(&pctl->spp_gchip->chip, pin))
+ return -EINVAL;
+ if (sppctl_gpio_get_direction(&pctl->spp_gchip->chip, pin))
+ return -EINVAL;
+ arg = sppctl_gpio_get(&pctl->spp_gchip->chip, pin);
+ break;
+
+ default:
+ return -EOPNOTSUPP;
+ }
+ *config = pinconf_to_config_packed(param, arg);
+
+ return 0;
+}
+
+static int sppctl_pin_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
+ unsigned long *configs, unsigned int num_configs)
+{
+ struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev);
+ int i;
+
+ /* Special handling for IOP pins */
+ if (configs[0] == SPPCTL_IOP_CONFIGS) {
+ sppctl_first_master_set(&pctl->spp_gchip->chip, pin, mux_f_gpio, mux_m_iop);
+ return 0;
+ }
+
+ for (i = 0; i < num_configs; i++) {
+ if (configs[i] & SPPCTL_PCTL_L_OUT)
+ sppctl_gpio_direction_output(&pctl->spp_gchip->chip, pin, 0);
+ if (configs[i] & SPPCTL_PCTL_L_OU1)
+ sppctl_gpio_direction_output(&pctl->spp_gchip->chip, pin, 1);
+ if (configs[i] & SPPCTL_PCTL_L_INV)
+ sppctl_gpio_input_inv_set(&pctl->spp_gchip->chip, pin);
+ if (configs[i] & SPPCTL_PCTL_L_ONV)
+ sppctl_gpio_output_inv_set(&pctl->spp_gchip->chip, pin);
+ if (configs[i] & SPPCTL_PCTL_L_ODR)
+ sppctl_gpio_output_od_set(&pctl->spp_gchip->chip, pin, 1);
+ }
+
+ return 0;
+}
+
+static const struct pinconf_ops sppctl_pconf_ops = {
+ .is_generic = true,
+ .pin_config_get = sppctl_pin_config_get,
+ .pin_config_set = sppctl_pin_config_set,
+};
+
+static int sppctl_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ return sppctl_list_funcs_sz;
+}
+
+static const char *sppctl_get_function_name(struct pinctrl_dev *pctldev,
+ unsigned int selector)
+{
+ return sppctl_list_funcs[selector].name;
+}
+
+static int sppctl_get_function_groups(struct pinctrl_dev *pctldev, unsigned int selector,
+ const char * const **groups, unsigned int *num_groups)
+{
+ struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev);
+ const struct sppctl_func *f = &sppctl_list_funcs[selector];
+ int i;
+
+ *num_groups = 0;
+ switch (f->type) {
+ case pinmux_type_fpmx:
+ *num_groups = sppctl_pmux_list_sz;
+ *groups = sppctl_pmux_list_s;
+ break;
+
+ case pinmux_type_grp:
+ if (!f->grps)
+ break;
+
+ *num_groups = f->gnum;
+ for (i = 0; i < pctl->unq_grps_sz; i++)
+ if (pctl->g2fp_maps[i].f_idx == selector)
+ break;
+ *groups = &pctl->unq_grps[i];
+ break;
+
+ default:
+ dev_err(pctldev->dev, "Unknown pinmux (selector: %d, type: %d)\n",
+ selector, f->type);
+ break;
+ }
+
+ return 0;
+}
+
+/**
+ * sppctl_fully_pinmux_conv - Convert GPIO# to fully-pinmux control-field setting
+ *
+ * Each fully-pinmux function can be mapped to any of GPIO 8 ~ 71 by
+ * settings its control-field. Refer to following table:
+ *
+ * control-field | GPIO
+ * --------------+--------
+ * 0 | No map
+ * 1 | 8
+ * 2 | 9
+ * 3 | 10
+ * : | :
+ * 65 | 71
+ */
+static inline int sppctl_fully_pinmux_conv(unsigned int offset)
+{
+ return (offset < 8) ? 0 : offset - 7;
+}
+
+static int sppctl_set_mux(struct pinctrl_dev *pctldev, unsigned int func_selector,
+ unsigned int group_selector)
+{
+ const struct sppctl_func *f = &sppctl_list_funcs[func_selector];
+ struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct grp2fp_map g2fpm = pctl->g2fp_maps[group_selector];
+ int i;
+
+ switch (f->type) {
+ case pinmux_type_fpmx:
+ sppctl_first_master_set(&pctl->spp_gchip->chip, group_selector,
+ mux_f_mux, mux_m_keep);
+ sppctl_func_set(pctl, func_selector, sppctl_fully_pinmux_conv(group_selector));
+ break;
+
+ case pinmux_type_grp:
+ for (i = 0; i < f->grps[g2fpm.g_idx].pnum; i++)
+ sppctl_first_master_set(&pctl->spp_gchip->chip,
+ f->grps[g2fpm.g_idx].pins[i],
+ mux_f_mux, mux_m_keep);
+ sppctl_gmx_set(pctl, f->roff, f->boff, f->blen, f->grps[g2fpm.g_idx].gval);
+ break;
+
+ default:
+ dev_err(pctldev->dev, "Unknown pinmux type (func_selector: %d, type: %d)\n",
+ func_selector, f->type);
+ break;
+ }
+
+ return 0;
+}
+
+static int sppctl_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range, unsigned int offset)
+{
+ struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev);
+ int g_f, g_m;
+
+ g_f = sppctl_first_get(&pctl->spp_gchip->chip, offset);
+ g_m = sppctl_master_get(&pctl->spp_gchip->chip, offset);
+ if (g_f == mux_f_gpio && g_m == mux_m_gpio)
+ return 0;
+
+ sppctl_first_master_set(&pctl->spp_gchip->chip, offset, mux_f_gpio, mux_m_gpio);
+ return 0;
+}
+
+static const struct pinmux_ops sppctl_pinmux_ops = {
+ .get_functions_count = sppctl_get_functions_count,
+ .get_function_name = sppctl_get_function_name,
+ .get_function_groups = sppctl_get_function_groups,
+ .set_mux = sppctl_set_mux,
+ .gpio_request_enable = sppctl_gpio_request_enable,
+ .strict = true,
+};
+
+static int sppctl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->unq_grps_sz;
+}
+
+static const char *sppctl_get_group_name(struct pinctrl_dev *pctldev, unsigned int selector)
+{
+ struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ return pctl->unq_grps[selector];
+}
+
+static int sppctl_get_group_pins(struct pinctrl_dev *pctldev, unsigned int selector,
+ const unsigned int **pins, unsigned int *num_pins)
+{
+ struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct grp2fp_map g2fpm = pctl->g2fp_maps[selector];
+ const struct sppctl_func *f;
+
+ f = &sppctl_list_funcs[g2fpm.f_idx];
+ *num_pins = 0;
+
+ /* Except group-pinmux, each group has 1 pin. */
+ if (f->type != pinmux_type_grp) {
+ *num_pins = 1;
+ *pins = &sppctl_pins_gpio[selector];
+ return 0;
+ }
+
+ /* Group-pinmux may have more than one pin. */
+ if (!f->grps)
+ return 0;
+
+ if (f->gnum < 1)
+ return 0;
+
+ *num_pins = f->grps[g2fpm.g_idx].pnum;
+ *pins = f->grps[g2fpm.g_idx].pins;
+
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void sppctl_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+ unsigned int offset)
+{
+ struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev);
+ const char *pin_type;
+ u8 first, master;
+
+ first = sppctl_first_get(&pctl->spp_gchip->chip, offset);
+ master = sppctl_master_get(&pctl->spp_gchip->chip, offset);
+ if (first)
+ if (master)
+ pin_type = "GPIO";
+ else
+ pin_type = " IOP";
+ else
+ pin_type = " MUX";
+ seq_printf(s, " %s", pin_type);
+}
+#endif
+
+static int sppctl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node *np_config,
+ struct pinctrl_map **map, unsigned int *num_maps)
+{
+ struct sppctl_pdata *pctl = pinctrl_dev_get_drvdata(pctldev);
+ int nmG = of_property_count_strings(np_config, "groups");
+ const struct sppctl_func *f = NULL;
+ u8 pin_num, pin_type, pin_func;
+ struct device_node *parent;
+ unsigned long *configs;
+ struct property *prop;
+ const char *s_f, *s_g;
+
+ const __be32 *list;
+ u32 dt_pin, dt_fun;
+ int i, size = 0;
+
+ list = of_get_property(np_config, "sunplus,pins", &size);
+ *num_maps = size / sizeof(*list);
+
+ /*
+ * Process property:
+ * sunplus,pins = < u32 u32 u32 ... >;
+ *
+ * Each 32-bit integer defines a individual pin in which:
+ *
+ * Bit 32~24: defines GPIO pin number. Its range is 0 ~ 98.
+ * Bit 23~16: defines types: (1) fully-pinmux pins
+ * (2) IO processor pins
+ * (3) digital GPIO pins
+ * Bit 15~8: defines pins of peripherals (which are defined in
+ * 'include/dt-binging/pinctrl/sppctl.h').
+ * Bit 7~0: defines types or initial-state of digital GPIO pins.
+ */
+ for (i = 0; i < (*num_maps); i++) {
+ dt_pin = be32_to_cpu(list[i]);
+ pin_num = FIELD_GET(GENMASK(31, 24), dt_pin);
+
+ if (pin_num >= sppctl_pins_all_sz) {
+ dev_err(pctldev->dev, "Invalid pin property at index %d (0x%08x)\n",
+ i, dt_pin);
+ return -EINVAL;
+ }
+ }
+
+ if (nmG <= 0)
+ nmG = 0;
+
+ *map = kcalloc(*num_maps + nmG, sizeof(**map), GFP_KERNEL);
+ if (!(*map))
+ return -ENOMEM;
+
+ parent = of_get_parent(np_config);
+ for (i = 0; i < (*num_maps); i++) {
+ dt_pin = be32_to_cpu(list[i]);
+ pin_num = FIELD_GET(GENMASK(31, 24), dt_pin);
+ pin_type = FIELD_GET(GENMASK(23, 16), dt_pin);
+ pin_func = FIELD_GET(GENMASK(15, 8), dt_pin);
+ (*map)[i].name = parent->name;
+
+ if (pin_type == SPPCTL_PCTL_G_GPIO) {
+ /* A digital GPIO pin */
+ (*map)[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
+ (*map)[i].data.configs.num_configs = 1;
+ (*map)[i].data.configs.group_or_pin = pin_get_name(pctldev, pin_num);
+ configs = kmalloc(sizeof(*configs), GFP_KERNEL);
+ if (!configs)
+ goto sppctl_map_err;
+ *configs = FIELD_GET(GENMASK(7, 0), dt_pin);
+ (*map)[i].data.configs.configs = configs;
+
+ dev_dbg(pctldev->dev, "%s: GPIO (%s)\n",
+ (*map)[i].data.configs.group_or_pin,
+ (*configs & (SPPCTL_PCTL_L_OUT | SPPCTL_PCTL_L_OU1)) ?
+ "OUT" : "IN");
+ } else if (pin_type == SPPCTL_PCTL_G_IOPP) {
+ /* A IO Processor (IOP) pin */
+ (*map)[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
+ (*map)[i].data.configs.num_configs = 1;
+ (*map)[i].data.configs.group_or_pin = pin_get_name(pctldev, pin_num);
+ configs = kmalloc(sizeof(*configs), GFP_KERNEL);
+ if (!configs)
+ goto sppctl_map_err;
+ *configs = SPPCTL_IOP_CONFIGS;
+ (*map)[i].data.configs.configs = configs;
+
+ dev_dbg(pctldev->dev, "%s: IOP\n",
+ (*map)[i].data.configs.group_or_pin);
+ } else {
+ /* A fully-pinmux pin */
+ (*map)[i].type = PIN_MAP_TYPE_MUX_GROUP;
+ (*map)[i].data.mux.function = sppctl_list_funcs[pin_func].name;
+ (*map)[i].data.mux.group = pin_get_name(pctldev, pin_num);
+
+ dev_dbg(pctldev->dev, "%s: %s\n", (*map)[i].data.mux.group,
+ (*map)[i].data.mux.function);
+ }
+ }
+
+ /*
+ * Process properties:
+ * function = "xxx";
+ * groups = "yyy";
+ */
+ if (nmG > 0 && of_property_read_string(np_config, "function", &s_f) == 0) {
+ of_property_for_each_string(np_config, "groups", prop, s_g) {
+ (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
+ (*map)[*num_maps].data.mux.function = s_f;
+ (*map)[*num_maps].data.mux.group = s_g;
+ (*num_maps)++;
+
+ dev_dbg(pctldev->dev, "%s: %s\n", s_f, s_g);
+ }
+ }
+
+ /*
+ * Process property:
+ * sunplus,zerofunc = < u32 u32 u32 ...>
+ */
+ list = of_get_property(np_config, "sunplus,zerofunc", &size);
+ if (list) {
+ for (i = 0; i < (size / sizeof(*list)); i++) {
+ dt_fun = be32_to_cpu(list[i]);
+ if (dt_fun >= sppctl_list_funcs_sz) {
+ dev_err(pctldev->dev, "Zero-func %d out of range!\n",
+ dt_fun);
+ continue;
+ }
+
+ f = &sppctl_list_funcs[dt_fun];
+ switch (f->type) {
+ case pinmux_type_fpmx:
+ sppctl_func_set(pctl, dt_fun, 0);
+ dev_dbg(pctldev->dev, "%s: No map\n", f->name);
+ break;
+
+ case pinmux_type_grp:
+ sppctl_gmx_set(pctl, f->roff, f->boff, f->blen, 0);
+ dev_dbg(pctldev->dev, "%s: No map\n", f->name);
+ break;
+
+ default:
+ dev_err(pctldev->dev, "Wrong zero-group: %d (%s)\n",
+ dt_fun, f->name);
+ break;
+ }
+ }
+ }
+
+ of_node_put(parent);
+ dev_dbg(pctldev->dev, "%d pins mapped\n", *num_maps);
+ return 0;
+
+sppctl_map_err:
+ for (i = 0; i < (*num_maps); i++)
+ if ((*map)[i].type == PIN_MAP_TYPE_CONFIGS_PIN)
+ kfree((*map)[i].data.configs.configs);
+ kfree(*map);
+ of_node_put(parent);
+ return -ENOMEM;
+}
+
+static const struct pinctrl_ops sppctl_pctl_ops = {
+ .get_groups_count = sppctl_get_groups_count,
+ .get_group_name = sppctl_get_group_name,
+ .get_group_pins = sppctl_get_group_pins,
+#ifdef CONFIG_DEBUG_FS
+ .pin_dbg_show = sppctl_pin_dbg_show,
+#endif
+ .dt_node_to_map = sppctl_dt_node_to_map,
+ .dt_free_map = pinctrl_utils_free_map,
+};
+
+static int sppctl_group_groups(struct platform_device *pdev)
+{
+ struct sppctl_pdata *sppctl = platform_get_drvdata(pdev);
+ int i, k, j;
+
+ /* Calculate number of total group (GPIO + group-pinmux group). */
+ sppctl->unq_grps_sz = sppctl_gpio_list_sz;
+ for (i = 0; i < sppctl_list_funcs_sz; i++)
+ if (sppctl_list_funcs[i].type == pinmux_type_grp)
+ sppctl->unq_grps_sz += sppctl_list_funcs[i].gnum;
+
+ sppctl->unq_grps = devm_kcalloc(&pdev->dev, sppctl->unq_grps_sz + 1,
+ sizeof(*sppctl->unq_grps), GFP_KERNEL);
+ if (!sppctl->unq_grps)
+ return -ENOMEM;
+
+ sppctl->g2fp_maps = devm_kcalloc(&pdev->dev, sppctl->unq_grps_sz + 1,
+ sizeof(*sppctl->g2fp_maps), GFP_KERNEL);
+ if (!sppctl->g2fp_maps)
+ return -ENOMEM;
+
+ /* Add GPIO pins. */
+ for (i = 0; i < sppctl_gpio_list_sz; i++) {
+ sppctl->unq_grps[i] = sppctl_gpio_list_s[i];
+ sppctl->g2fp_maps[i].f_idx = 0;
+ sppctl->g2fp_maps[i].g_idx = i;
+ }
+
+ /* Add group-pinmux to end of GPIO pins. */
+ j = sppctl_gpio_list_sz;
+ for (i = 0; i < sppctl_list_funcs_sz; i++) {
+ if (sppctl_list_funcs[i].type != pinmux_type_grp)
+ continue;
+
+ for (k = 0; k < sppctl_list_funcs[i].gnum; k++) {
+ sppctl->unq_grps[j] = sppctl_list_funcs[i].grps[k].name;
+ sppctl->g2fp_maps[j].f_idx = i;
+ sppctl->g2fp_maps[j].g_idx = k;
+ j++;
+ }
+ }
+
+ return 0;
+}
+
+static int sppctl_pinctrl_init(struct platform_device *pdev)
+{
+ struct sppctl_pdata *sppctl = platform_get_drvdata(pdev);
+ int err;
+
+ sppctl->pctl_desc.owner = THIS_MODULE;
+ sppctl->pctl_desc.name = dev_name(&pdev->dev);
+ sppctl->pctl_desc.pins = sppctl_pins_all;
+ sppctl->pctl_desc.npins = sppctl_pins_all_sz;
+ sppctl->pctl_desc.pctlops = &sppctl_pctl_ops;
+ sppctl->pctl_desc.confops = &sppctl_pconf_ops;
+ sppctl->pctl_desc.pmxops = &sppctl_pinmux_ops;
+
+ err = sppctl_group_groups(pdev);
+ if (err)
+ return err;
+
+ err = devm_pinctrl_register_and_init(&pdev->dev, &sppctl->pctl_desc,
+ sppctl, &sppctl->pctl_dev);
+ if (err)
+ return dev_err_probe(&pdev->dev, err, "Failed to register pinctrl!\n");
+
+ pinctrl_enable(sppctl->pctl_dev);
+ return 0;
+}
+
+static int sppctl_resource_map(struct platform_device *pdev, struct sppctl_pdata *sppctl)
+{
+ sppctl->moon2_base = devm_platform_ioremap_resource_byname(pdev, "moon2");
+ if (IS_ERR(sppctl->moon2_base))
+ return PTR_ERR(sppctl->moon2_base);
+
+ sppctl->gpioxt_base = devm_platform_ioremap_resource_byname(pdev, "gpioxt");
+ if (IS_ERR(sppctl->gpioxt_base))
+ return PTR_ERR(sppctl->gpioxt_base);
+
+ sppctl->first_base = devm_platform_ioremap_resource_byname(pdev, "first");
+ if (IS_ERR(sppctl->first_base))
+ return PTR_ERR(sppctl->first_base);
+
+ sppctl->moon1_base = devm_platform_ioremap_resource_byname(pdev, "moon1");
+ if (IS_ERR(sppctl->moon1_base))
+ return PTR_ERR(sppctl->moon1_base);
+
+ return 0;
+}
+
+static int sppctl_probe(struct platform_device *pdev)
+{
+ struct sppctl_pdata *sppctl;
+ int ret;
+
+ sppctl = devm_kzalloc(&pdev->dev, sizeof(*sppctl), GFP_KERNEL);
+ if (!sppctl)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, sppctl);
+
+ ret = sppctl_resource_map(pdev, sppctl);
+ if (ret)
+ return ret;
+
+ ret = sppctl_gpio_new(pdev, sppctl);
+ if (ret)
+ return ret;
+
+ ret = sppctl_pinctrl_init(pdev);
+ if (ret)
+ return ret;
+
+ pinctrl_add_gpio_range(sppctl->pctl_dev, &sppctl->pctl_grange);
+
+ return 0;
+}
+
+static const struct of_device_id sppctl_match_table[] = {
+ { .compatible = "sunplus,sp7021-pctl" },
+ { /* sentinel */ }
+};
+
+static struct platform_driver sppctl_pinctrl_driver = {
+ .driver = {
+ .name = SPPCTL_MODULE_NAME,
+ .of_match_table = sppctl_match_table,
+ },
+ .probe = sppctl_probe,
+};
+builtin_platform_driver(sppctl_pinctrl_driver)
+
+MODULE_AUTHOR("Dvorkin Dmitry <dvorkin@tibbo.com>");
+MODULE_AUTHOR("Wells Lu <wellslutw@gmail.com>");
+MODULE_DESCRIPTION("Sunplus SP7021 Pin Control and GPIO driver");
+MODULE_LICENSE("GPL v2");