// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2018 MediaTek Inc. * Author: Ryder Lee */ #include #include #include #include #include #include #include #include #include "pinctrl-mtk-common.h" #if CONFIG_IS_ENABLED(PINCONF) /** * struct mtk_drive_desc - the structure that holds the information * of the driving current * @min: the minimum current of this group * @max: the maximum current of this group * @step: the step current of this group * @scal: the weight factor * * formula: output = ((input) / step - 1) * scal */ struct mtk_drive_desc { u8 min; u8 max; u8 step; u8 scal; }; /* The groups of drive strength */ static const struct mtk_drive_desc mtk_drive[] = { [DRV_GRP0] = { 4, 16, 4, 1 }, [DRV_GRP1] = { 4, 16, 4, 2 }, [DRV_GRP2] = { 2, 8, 2, 1 }, [DRV_GRP3] = { 2, 8, 2, 2 }, [DRV_GRP4] = { 2, 16, 2, 1 }, }; #endif static const char *mtk_pinctrl_dummy_name = "_dummy"; static void mtk_w32(struct udevice *dev, u32 reg, u32 val) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); __raw_writel(val, priv->base + reg); } static u32 mtk_r32(struct udevice *dev, u32 reg) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); return __raw_readl(priv->base + reg); } static inline int get_count_order(unsigned int count) { int order; order = fls(count) - 1; if (count & (count - 1)) order++; return order; } void mtk_rmw(struct udevice *dev, u32 reg, u32 mask, u32 set) { u32 val; val = mtk_r32(dev, reg); val &= ~mask; val |= set; mtk_w32(dev, reg, val); } static int mtk_hw_pin_field_lookup(struct udevice *dev, int pin, const struct mtk_pin_reg_calc *rc, struct mtk_pin_field *pfd) { const struct mtk_pin_field_calc *c, *e; u32 bits; c = rc->range; e = c + rc->nranges; while (c < e) { if (pin >= c->s_pin && pin <= c->e_pin) break; c++; } if (c >= e) return -EINVAL; /* Calculated bits as the overall offset the pin is located at, * if c->fixed is held, that determines the all the pins in the * range use the same field with the s_pin. */ bits = c->fixed ? c->s_bit : c->s_bit + (pin - c->s_pin) * (c->x_bits); /* Fill pfd from bits. For example 32-bit register applied is assumed * when c->sz_reg is equal to 32. */ pfd->offset = c->s_addr + c->x_addrs * (bits / c->sz_reg); pfd->bitpos = bits % c->sz_reg; pfd->mask = (1 << c->x_bits) - 1; /* pfd->next is used for indicating that bit wrapping-around happens * which requires the manipulation for bit 0 starting in the next * register to form the complete field read/write. */ pfd->next = pfd->bitpos + c->x_bits > c->sz_reg ? c->x_addrs : 0; return 0; } static int mtk_hw_pin_field_get(struct udevice *dev, int pin, int field, struct mtk_pin_field *pfd) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); const struct mtk_pin_reg_calc *rc; if (field < 0 || field >= PINCTRL_PIN_REG_MAX) return -EINVAL; if (priv->soc->reg_cal && priv->soc->reg_cal[field].range) rc = &priv->soc->reg_cal[field]; else return -EINVAL; return mtk_hw_pin_field_lookup(dev, pin, rc, pfd); } static void mtk_hw_bits_part(struct mtk_pin_field *pf, int *h, int *l) { *l = 32 - pf->bitpos; *h = get_count_order(pf->mask) - *l; } static void mtk_hw_write_cross_field(struct udevice *dev, struct mtk_pin_field *pf, int value) { int nbits_l, nbits_h; mtk_hw_bits_part(pf, &nbits_h, &nbits_l); mtk_rmw(dev, pf->offset, pf->mask << pf->bitpos, (value & pf->mask) << pf->bitpos); mtk_rmw(dev, pf->offset + pf->next, BIT(nbits_h) - 1, (value & pf->mask) >> nbits_l); } static void mtk_hw_read_cross_field(struct udevice *dev, struct mtk_pin_field *pf, int *value) { int nbits_l, nbits_h, h, l; mtk_hw_bits_part(pf, &nbits_h, &nbits_l); l = (mtk_r32(dev, pf->offset) >> pf->bitpos) & (BIT(nbits_l) - 1); h = (mtk_r32(dev, pf->offset + pf->next)) & (BIT(nbits_h) - 1); *value = (h << nbits_l) | l; } static int mtk_hw_set_value(struct udevice *dev, int pin, int field, int value) { struct mtk_pin_field pf; int err; err = mtk_hw_pin_field_get(dev, pin, field, &pf); if (err) return err; if (!pf.next) mtk_rmw(dev, pf.offset, pf.mask << pf.bitpos, (value & pf.mask) << pf.bitpos); else mtk_hw_write_cross_field(dev, &pf, value); return 0; } static int mtk_hw_get_value(struct udevice *dev, int pin, int field, int *value) { struct mtk_pin_field pf; int err; err = mtk_hw_pin_field_get(dev, pin, field, &pf); if (err) return err; if (!pf.next) *value = (mtk_r32(dev, pf.offset) >> pf.bitpos) & pf.mask; else mtk_hw_read_cross_field(dev, &pf, value); return 0; } static int mtk_get_groups_count(struct udevice *dev) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); return priv->soc->ngrps; } static const char *mtk_get_pin_name(struct udevice *dev, unsigned int selector) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); if (!priv->soc->pins[selector].name) return mtk_pinctrl_dummy_name; return priv->soc->pins[selector].name; } static int mtk_get_pins_count(struct udevice *dev) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); return priv->soc->npins; } static int mtk_get_pin_muxing(struct udevice *dev, unsigned int selector, char *buf, int size) { int val, err; err = mtk_hw_get_value(dev, selector, PINCTRL_PIN_REG_MODE, &val); if (err) return err; snprintf(buf, size, "Aux Func.%d", val); return 0; } static const char *mtk_get_group_name(struct udevice *dev, unsigned int selector) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); if (!priv->soc->grps[selector].name) return mtk_pinctrl_dummy_name; return priv->soc->grps[selector].name; } static int mtk_get_functions_count(struct udevice *dev) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); return priv->soc->nfuncs; } static const char *mtk_get_function_name(struct udevice *dev, unsigned int selector) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); if (!priv->soc->funcs[selector].name) return mtk_pinctrl_dummy_name; return priv->soc->funcs[selector].name; } static int mtk_pinmux_group_set(struct udevice *dev, unsigned int group_selector, unsigned int func_selector) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); const struct mtk_group_desc *grp = &priv->soc->grps[group_selector]; int i; for (i = 0; i < grp->num_pins; i++) { int *pin_modes = grp->data; mtk_hw_set_value(dev, grp->pins[i], PINCTRL_PIN_REG_MODE, pin_modes[i]); } return 0; } #if CONFIG_IS_ENABLED(PINCONF) static const struct pinconf_param mtk_conf_params[] = { { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 }, { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 }, { "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 }, { "input-schmitt-enable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 1 }, { "input-schmitt-disable", PIN_CONFIG_INPUT_SCHMITT_ENABLE, 0 }, { "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 }, { "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 }, { "output-enable", PIN_CONFIG_OUTPUT_ENABLE, 1 }, { "output-high", PIN_CONFIG_OUTPUT, 1, }, { "output-low", PIN_CONFIG_OUTPUT, 0, }, { "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 }, }; int mtk_pinconf_bias_set_v0(struct udevice *dev, u32 pin, u32 arg, u32 val) { int err, disable, pullup; disable = (arg == PIN_CONFIG_BIAS_DISABLE); pullup = (arg == PIN_CONFIG_BIAS_PULL_UP); if (disable) { err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PU, 0); if (err) return err; err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PD, 0); if (err) return err; } else { err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PU, pullup); if (err) return err; err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PD, !pullup); if (err) return err; } return 0; } int mtk_pinconf_bias_set_v1(struct udevice *dev, u32 pin, u32 arg, u32 val) { int err, disable, pullup, r0, r1; disable = (arg == PIN_CONFIG_BIAS_DISABLE); pullup = (arg == PIN_CONFIG_BIAS_PULL_UP); r0 = !!(val & 1); r1 = !!(val & 2); if (disable) { err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PULLEN, 0); if (err) return err; } else { err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PULLEN, 1); if (err) return err; err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PULLSEL, pullup); if (err) return err; } /* Also set PUPD/R0/R1 if the pin has them */ err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_PUPD, !pullup); if (err != -EINVAL) { mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_R0, r0); mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_R1, r1); } return 0; } int mtk_pinconf_input_enable_v1(struct udevice *dev, u32 pin, u32 arg) { int err; err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_IES, 1); if (err) return err; err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DIR, 0); if (err) return err; return 0; } int mtk_pinconf_drive_set_v0(struct udevice *dev, u32 pin, u32 arg) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); const struct mtk_pin_desc *desc = &priv->soc->pins[pin]; const struct mtk_drive_desc *tb; int err = -ENOTSUPP; tb = &mtk_drive[desc->drv_n]; /* 4mA when (e8, e4) = (0, 0) * 8mA when (e8, e4) = (0, 1) * 12mA when (e8, e4) = (1, 0) * 16mA when (e8, e4) = (1, 1) */ if ((arg >= tb->min && arg <= tb->max) && !(arg % tb->step)) { arg = (arg / tb->step - 1) * tb->scal; err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_E4, arg & 0x1); if (err) return err; err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_E8, (arg & 0x2) >> 1); if (err) return err; } return 0; } int mtk_pinconf_drive_set_v1(struct udevice *dev, u32 pin, u32 arg) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); const struct mtk_pin_desc *desc = &priv->soc->pins[pin]; const struct mtk_drive_desc *tb; int err = -ENOTSUPP; tb = &mtk_drive[desc->drv_n]; if ((arg >= tb->min && arg <= tb->max) && !(arg % tb->step)) { arg = (arg / tb->step - 1) * tb->scal; err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DRV, arg); if (err) return err; } return 0; } static int mtk_pinconf_set(struct udevice *dev, unsigned int pin, unsigned int param, unsigned int arg) { int err = 0; struct mtk_pinctrl_priv *priv = dev_get_priv(dev); int rev = priv->soc->rev; switch (param) { case PIN_CONFIG_BIAS_DISABLE: case PIN_CONFIG_BIAS_PULL_UP: case PIN_CONFIG_BIAS_PULL_DOWN: if (rev == MTK_PINCTRL_V0) err = mtk_pinconf_bias_set_v0(dev, pin, param, arg); else err = mtk_pinconf_bias_set_v1(dev, pin, param, arg); if (err) goto err; break; case PIN_CONFIG_OUTPUT_ENABLE: err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_SMT, 0); if (err) goto err; err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DIR, 1); if (err) goto err; break; case PIN_CONFIG_INPUT_ENABLE: if (rev == MTK_PINCTRL_V1) err = mtk_pinconf_input_enable_v1(dev, pin, param); if (err) goto err; break; case PIN_CONFIG_OUTPUT: err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DIR, 1); if (err) goto err; err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DO, arg); if (err) goto err; break; case PIN_CONFIG_INPUT_SCHMITT_ENABLE: /* arg = 1: Input mode & SMT enable ; * arg = 0: Output mode & SMT disable */ arg = arg ? 2 : 1; err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_DIR, arg & 1); if (err) goto err; err = mtk_hw_set_value(dev, pin, PINCTRL_PIN_REG_SMT, !!(arg & 2)); if (err) goto err; break; case PIN_CONFIG_DRIVE_STRENGTH: if (rev == MTK_PINCTRL_V0) err = mtk_pinconf_drive_set_v0(dev, pin, arg); else err = mtk_pinconf_drive_set_v1(dev, pin, arg); if (err) goto err; break; default: err = -ENOTSUPP; } err: return err; } static int mtk_pinconf_group_set(struct udevice *dev, unsigned int group_selector, unsigned int param, unsigned int arg) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); const struct mtk_group_desc *grp = &priv->soc->grps[group_selector]; int i, ret; for (i = 0; i < grp->num_pins; i++) { ret = mtk_pinconf_set(dev, grp->pins[i], param, arg); if (ret) return ret; } return 0; } #endif const struct pinctrl_ops mtk_pinctrl_ops = { .get_pins_count = mtk_get_pins_count, .get_pin_name = mtk_get_pin_name, .get_pin_muxing = mtk_get_pin_muxing, .get_groups_count = mtk_get_groups_count, .get_group_name = mtk_get_group_name, .get_functions_count = mtk_get_functions_count, .get_function_name = mtk_get_function_name, .pinmux_group_set = mtk_pinmux_group_set, #if CONFIG_IS_ENABLED(PINCONF) .pinconf_num_params = ARRAY_SIZE(mtk_conf_params), .pinconf_params = mtk_conf_params, .pinconf_set = mtk_pinconf_set, .pinconf_group_set = mtk_pinconf_group_set, #endif .set_state = pinctrl_generic_set_state, }; #if CONFIG_IS_ENABLED(DM_GPIO) || \ (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_GPIO_SUPPORT)) static int mtk_gpio_get(struct udevice *dev, unsigned int off) { int val, err; err = mtk_hw_get_value(dev->parent, off, PINCTRL_PIN_REG_DI, &val); if (err) return err; return !!val; } static int mtk_gpio_set(struct udevice *dev, unsigned int off, int val) { return mtk_hw_set_value(dev->parent, off, PINCTRL_PIN_REG_DO, !!val); } static int mtk_gpio_get_direction(struct udevice *dev, unsigned int off) { int val, err; err = mtk_hw_get_value(dev->parent, off, PINCTRL_PIN_REG_DIR, &val); if (err) return err; return val ? GPIOF_OUTPUT : GPIOF_INPUT; } static int mtk_gpio_direction_input(struct udevice *dev, unsigned int off) { return mtk_hw_set_value(dev->parent, off, PINCTRL_PIN_REG_DIR, 0); } static int mtk_gpio_direction_output(struct udevice *dev, unsigned int off, int val) { mtk_gpio_set(dev, off, val); /* And set the requested value */ return mtk_hw_set_value(dev->parent, off, PINCTRL_PIN_REG_DIR, 1); } static int mtk_gpio_request(struct udevice *dev, unsigned int off, const char *label) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev->parent); return mtk_hw_set_value(dev->parent, off, PINCTRL_PIN_REG_MODE, priv->soc->gpio_mode); } static int mtk_gpio_probe(struct udevice *dev) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev->parent); struct gpio_dev_priv *uc_priv; uc_priv = dev_get_uclass_priv(dev); uc_priv->bank_name = priv->soc->name; uc_priv->gpio_count = priv->soc->npins; return 0; } static const struct dm_gpio_ops mtk_gpio_ops = { .request = mtk_gpio_request, .set_value = mtk_gpio_set, .get_value = mtk_gpio_get, .get_function = mtk_gpio_get_direction, .direction_input = mtk_gpio_direction_input, .direction_output = mtk_gpio_direction_output, }; static struct driver mtk_gpio_driver = { .name = "mediatek_gpio", .id = UCLASS_GPIO, .probe = mtk_gpio_probe, .ops = &mtk_gpio_ops, }; static int mtk_gpiochip_register(struct udevice *parent) { struct uclass_driver *drv; struct udevice *dev; int ret; ofnode node; drv = lists_uclass_lookup(UCLASS_GPIO); if (!drv) return -ENOENT; ret = -ENOENT; dev_for_each_subnode(node, parent) if (ofnode_read_bool(node, "gpio-controller")) { ret = 0; break; } if (ret) return ret; ret = device_bind_with_driver_data(parent, &mtk_gpio_driver, "mediatek_gpio", 0, node, &dev); if (ret) return ret; return 0; } #endif int mtk_pinctrl_common_probe(struct udevice *dev, struct mtk_pinctrl_soc *soc) { struct mtk_pinctrl_priv *priv = dev_get_priv(dev); int ret = 0; priv->base = dev_read_addr_ptr(dev); if (!priv->base) return -EINVAL; priv->soc = soc; #if CONFIG_IS_ENABLED(DM_GPIO) || \ (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_GPIO_SUPPORT)) ret = mtk_gpiochip_register(dev); #endif return ret; }