diff options
Diffstat (limited to 'drivers/pinctrl/mediatek/pinctrl-mtk-common.c')
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 608 |
1 files changed, 114 insertions, 494 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c index c3975a04d1cdd..b3799695d8db8 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c @@ -38,6 +38,7 @@ #include "../core.h" #include "../pinconf.h" #include "../pinctrl-utils.h" +#include "mtk-eint.h" #include "pinctrl-mtk-common.h" #define MAX_GPIO_MODE_PER_REG 5 @@ -831,243 +832,38 @@ static int mtk_gpio_get(struct gpio_chip *chip, unsigned offset) static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned offset) { - const struct mtk_desc_pin *pin; struct mtk_pinctrl *pctl = gpiochip_get_data(chip); - int irq; - - pin = pctl->devdata->pins + offset; - if (pin->eint.eintnum == NO_EINT_SUPPORT) - return -EINVAL; - - irq = irq_find_mapping(pctl->domain, pin->eint.eintnum); - if (!irq) - return -EINVAL; - - return irq; -} - -static int mtk_pinctrl_irq_request_resources(struct irq_data *d) -{ - struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); - const struct mtk_desc_pin *pin; - int ret; - - pin = mtk_find_pin_by_eint_num(pctl, d->hwirq); - - if (!pin) { - dev_err(pctl->dev, "Can not find pin\n"); - return -EINVAL; - } - - ret = gpiochip_lock_as_irq(pctl->chip, pin->pin.number); - if (ret) { - dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n", - irqd_to_hwirq(d)); - return ret; - } - - /* set mux to INT mode */ - mtk_pmx_set_mode(pctl->pctl_dev, pin->pin.number, pin->eint.eintmux); - /* set gpio direction to input */ - mtk_pmx_gpio_set_direction(pctl->pctl_dev, NULL, pin->pin.number, true); - /* set input-enable */ - mtk_pconf_set_ies_smt(pctl, pin->pin.number, 1, PIN_CONFIG_INPUT_ENABLE); - - return 0; -} - -static void mtk_pinctrl_irq_release_resources(struct irq_data *d) -{ - struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); - const struct mtk_desc_pin *pin; - - pin = mtk_find_pin_by_eint_num(pctl, d->hwirq); - - if (!pin) { - dev_err(pctl->dev, "Can not find pin\n"); - return; - } - - gpiochip_unlock_as_irq(pctl->chip, pin->pin.number); -} - -static void __iomem *mtk_eint_get_offset(struct mtk_pinctrl *pctl, - unsigned int eint_num, unsigned int offset) -{ - unsigned int eint_base = 0; - void __iomem *reg; - - if (eint_num >= pctl->devdata->ap_num) - eint_base = pctl->devdata->ap_num; - - reg = pctl->eint_reg_base + offset + ((eint_num - eint_base) / 32) * 4; - - return reg; -} - -/* - * mtk_can_en_debounce: Check the EINT number is able to enable debounce or not - * @eint_num: the EINT number to setmtk_pinctrl - */ -static unsigned int mtk_eint_can_en_debounce(struct mtk_pinctrl *pctl, - unsigned int eint_num) -{ - unsigned int sens; - unsigned int bit = BIT(eint_num % 32); - const struct mtk_eint_offsets *eint_offsets = - &pctl->devdata->eint_offsets; - - void __iomem *reg = mtk_eint_get_offset(pctl, eint_num, - eint_offsets->sens); - - if (readl(reg) & bit) - sens = MT_LEVEL_SENSITIVE; - else - sens = MT_EDGE_SENSITIVE; - - if ((eint_num < pctl->devdata->db_cnt) && (sens != MT_EDGE_SENSITIVE)) - return 1; - else - return 0; -} - -/* - * mtk_eint_get_mask: To get the eint mask - * @eint_num: the EINT number to get - */ -static unsigned int mtk_eint_get_mask(struct mtk_pinctrl *pctl, - unsigned int eint_num) -{ - unsigned int bit = BIT(eint_num % 32); - const struct mtk_eint_offsets *eint_offsets = - &pctl->devdata->eint_offsets; - - void __iomem *reg = mtk_eint_get_offset(pctl, eint_num, - eint_offsets->mask); - - return !!(readl(reg) & bit); -} - -static int mtk_eint_flip_edge(struct mtk_pinctrl *pctl, int hwirq) -{ - int start_level, curr_level; - unsigned int reg_offset; - const struct mtk_eint_offsets *eint_offsets = &(pctl->devdata->eint_offsets); - u32 mask = BIT(hwirq & 0x1f); - u32 port = (hwirq >> 5) & eint_offsets->port_mask; - void __iomem *reg = pctl->eint_reg_base + (port << 2); const struct mtk_desc_pin *pin; - - pin = mtk_find_pin_by_eint_num(pctl, hwirq); - curr_level = mtk_gpio_get(pctl->chip, pin->pin.number); - do { - start_level = curr_level; - if (start_level) - reg_offset = eint_offsets->pol_clr; - else - reg_offset = eint_offsets->pol_set; - writel(mask, reg + reg_offset); - - curr_level = mtk_gpio_get(pctl->chip, pin->pin.number); - } while (start_level != curr_level); - - return start_level; -} - -static void mtk_eint_mask(struct irq_data *d) -{ - struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); - const struct mtk_eint_offsets *eint_offsets = - &pctl->devdata->eint_offsets; - u32 mask = BIT(d->hwirq & 0x1f); - void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq, - eint_offsets->mask_set); - - writel(mask, reg); -} - -static void mtk_eint_unmask(struct irq_data *d) -{ - struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); - const struct mtk_eint_offsets *eint_offsets = - &pctl->devdata->eint_offsets; - u32 mask = BIT(d->hwirq & 0x1f); - void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq, - eint_offsets->mask_clr); - - writel(mask, reg); - - if (pctl->eint_dual_edges[d->hwirq]) - mtk_eint_flip_edge(pctl, d->hwirq); -} - -static int mtk_gpio_set_debounce(struct gpio_chip *chip, unsigned offset, - unsigned debounce) -{ - struct mtk_pinctrl *pctl = dev_get_drvdata(chip->parent); - int eint_num, virq, eint_offset; - unsigned int set_offset, bit, clr_bit, clr_offset, rst, i, unmask, dbnc; - static const unsigned int debounce_time[] = {500, 1000, 16000, 32000, 64000, - 128000, 256000}; - const struct mtk_desc_pin *pin; - struct irq_data *d; + unsigned long eint_n; pin = pctl->devdata->pins + offset; if (pin->eint.eintnum == NO_EINT_SUPPORT) return -EINVAL; - eint_num = pin->eint.eintnum; - virq = irq_find_mapping(pctl->domain, eint_num); - eint_offset = (eint_num % 4) * 8; - d = irq_get_irq_data(virq); + eint_n = pin->eint.eintnum; - set_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_set; - clr_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_clr; - if (!mtk_eint_can_en_debounce(pctl, eint_num)) - return -ENOSYS; - - dbnc = ARRAY_SIZE(debounce_time); - for (i = 0; i < ARRAY_SIZE(debounce_time); i++) { - if (debounce <= debounce_time[i]) { - dbnc = i; - break; - } - } - - if (!mtk_eint_get_mask(pctl, eint_num)) { - mtk_eint_mask(d); - unmask = 1; - } else { - unmask = 0; - } - - clr_bit = 0xff << eint_offset; - writel(clr_bit, pctl->eint_reg_base + clr_offset); - - bit = ((dbnc << EINT_DBNC_SET_DBNC_BITS) | EINT_DBNC_SET_EN) << - eint_offset; - rst = EINT_DBNC_RST_BIT << eint_offset; - writel(rst | bit, pctl->eint_reg_base + set_offset); - - /* Delay a while (more than 2T) to wait for hw debounce counter reset - work correctly */ - udelay(1); - if (unmask == 1) - mtk_eint_unmask(d); - - return 0; + return mtk_eint_find_irq(pctl->eint, eint_n); } static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned offset, unsigned long config) { + struct mtk_pinctrl *pctl = gpiochip_get_data(chip); + const struct mtk_desc_pin *pin; + unsigned long eint_n; u32 debounce; if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE) return -ENOTSUPP; + pin = pctl->devdata->pins + offset; + if (pin->eint.eintnum == NO_EINT_SUPPORT) + return -EINVAL; + debounce = pinconf_to_config_argument(config); - return mtk_gpio_set_debounce(chip, offset, debounce); + eint_n = pin->eint.eintnum; + + return mtk_eint_set_debounce(pctl->eint, eint_n, debounce); } static const struct gpio_chip mtk_gpio_chip = { @@ -1084,117 +880,18 @@ static const struct gpio_chip mtk_gpio_chip = { .of_gpio_n_cells = 2, }; -static int mtk_eint_set_type(struct irq_data *d, - unsigned int type) -{ - struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); - const struct mtk_eint_offsets *eint_offsets = - &pctl->devdata->eint_offsets; - u32 mask = BIT(d->hwirq & 0x1f); - void __iomem *reg; - - if (((type & IRQ_TYPE_EDGE_BOTH) && (type & IRQ_TYPE_LEVEL_MASK)) || - ((type & IRQ_TYPE_LEVEL_MASK) == IRQ_TYPE_LEVEL_MASK)) { - dev_err(pctl->dev, "Can't configure IRQ%d (EINT%lu) for type 0x%X\n", - d->irq, d->hwirq, type); - return -EINVAL; - } - - if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) - pctl->eint_dual_edges[d->hwirq] = 1; - else - pctl->eint_dual_edges[d->hwirq] = 0; - - if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) { - reg = mtk_eint_get_offset(pctl, d->hwirq, - eint_offsets->pol_clr); - writel(mask, reg); - } else { - reg = mtk_eint_get_offset(pctl, d->hwirq, - eint_offsets->pol_set); - writel(mask, reg); - } - - if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) { - reg = mtk_eint_get_offset(pctl, d->hwirq, - eint_offsets->sens_clr); - writel(mask, reg); - } else { - reg = mtk_eint_get_offset(pctl, d->hwirq, - eint_offsets->sens_set); - writel(mask, reg); - } - - if (pctl->eint_dual_edges[d->hwirq]) - mtk_eint_flip_edge(pctl, d->hwirq); - - return 0; -} - -static int mtk_eint_irq_set_wake(struct irq_data *d, unsigned int on) -{ - struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); - int shift = d->hwirq & 0x1f; - int reg = d->hwirq >> 5; - - if (on) - pctl->wake_mask[reg] |= BIT(shift); - else - pctl->wake_mask[reg] &= ~BIT(shift); - - return 0; -} - -static void mtk_eint_chip_write_mask(const struct mtk_eint_offsets *chip, - void __iomem *eint_reg_base, u32 *buf) -{ - int port; - void __iomem *reg; - - for (port = 0; port < chip->ports; port++) { - reg = eint_reg_base + (port << 2); - writel_relaxed(~buf[port], reg + chip->mask_set); - writel_relaxed(buf[port], reg + chip->mask_clr); - } -} - -static void mtk_eint_chip_read_mask(const struct mtk_eint_offsets *chip, - void __iomem *eint_reg_base, u32 *buf) -{ - int port; - void __iomem *reg; - - for (port = 0; port < chip->ports; port++) { - reg = eint_reg_base + chip->mask + (port << 2); - buf[port] = ~readl_relaxed(reg); - /* Mask is 0 when irq is enabled, and 1 when disabled. */ - } -} - static int mtk_eint_suspend(struct device *device) { - void __iomem *reg; struct mtk_pinctrl *pctl = dev_get_drvdata(device); - const struct mtk_eint_offsets *eint_offsets = - &pctl->devdata->eint_offsets; - - reg = pctl->eint_reg_base; - mtk_eint_chip_read_mask(eint_offsets, reg, pctl->cur_mask); - mtk_eint_chip_write_mask(eint_offsets, reg, pctl->wake_mask); - return 0; + return mtk_eint_do_suspend(pctl->eint); } static int mtk_eint_resume(struct device *device) { struct mtk_pinctrl *pctl = dev_get_drvdata(device); - const struct mtk_eint_offsets *eint_offsets = - &pctl->devdata->eint_offsets; - - mtk_eint_chip_write_mask(eint_offsets, - pctl->eint_reg_base, pctl->cur_mask); - return 0; + return mtk_eint_do_resume(pctl->eint); } const struct dev_pm_ops mtk_eint_pm_ops = { @@ -1202,117 +899,6 @@ const struct dev_pm_ops mtk_eint_pm_ops = { .resume_noirq = mtk_eint_resume, }; -static void mtk_eint_ack(struct irq_data *d) -{ - struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d); - const struct mtk_eint_offsets *eint_offsets = - &pctl->devdata->eint_offsets; - u32 mask = BIT(d->hwirq & 0x1f); - void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq, - eint_offsets->ack); - - writel(mask, reg); -} - -static struct irq_chip mtk_pinctrl_irq_chip = { - .name = "mt-eint", - .irq_disable = mtk_eint_mask, - .irq_mask = mtk_eint_mask, - .irq_unmask = mtk_eint_unmask, - .irq_ack = mtk_eint_ack, - .irq_set_type = mtk_eint_set_type, - .irq_set_wake = mtk_eint_irq_set_wake, - .irq_request_resources = mtk_pinctrl_irq_request_resources, - .irq_release_resources = mtk_pinctrl_irq_release_resources, -}; - -static unsigned int mtk_eint_init(struct mtk_pinctrl *pctl) -{ - const struct mtk_eint_offsets *eint_offsets = - &pctl->devdata->eint_offsets; - void __iomem *reg = pctl->eint_reg_base + eint_offsets->dom_en; - unsigned int i; - - for (i = 0; i < pctl->devdata->ap_num; i += 32) { - writel(0xffffffff, reg); - reg += 4; - } - return 0; -} - -static inline void -mtk_eint_debounce_process(struct mtk_pinctrl *pctl, int index) -{ - unsigned int rst, ctrl_offset; - unsigned int bit, dbnc; - const struct mtk_eint_offsets *eint_offsets = - &pctl->devdata->eint_offsets; - - ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_ctrl; - dbnc = readl(pctl->eint_reg_base + ctrl_offset); - bit = EINT_DBNC_SET_EN << ((index % 4) * 8); - if ((bit & dbnc) > 0) { - ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_set; - rst = EINT_DBNC_RST_BIT << ((index % 4) * 8); - writel(rst, pctl->eint_reg_base + ctrl_offset); - } -} - -static void mtk_eint_irq_handler(struct irq_desc *desc) -{ - struct irq_chip *chip = irq_desc_get_chip(desc); - struct mtk_pinctrl *pctl = irq_desc_get_handler_data(desc); - unsigned int status, eint_num; - int offset, index, virq; - const struct mtk_eint_offsets *eint_offsets = - &pctl->devdata->eint_offsets; - void __iomem *reg = mtk_eint_get_offset(pctl, 0, eint_offsets->stat); - int dual_edges, start_level, curr_level; - const struct mtk_desc_pin *pin; - - chained_irq_enter(chip, desc); - for (eint_num = 0; - eint_num < pctl->devdata->ap_num; - eint_num += 32, reg += 4) { - status = readl(reg); - while (status) { - offset = __ffs(status); - index = eint_num + offset; - virq = irq_find_mapping(pctl->domain, index); - status &= ~BIT(offset); - - dual_edges = pctl->eint_dual_edges[index]; - if (dual_edges) { - /* Clear soft-irq in case we raised it - last time */ - writel(BIT(offset), reg - eint_offsets->stat + - eint_offsets->soft_clr); - - pin = mtk_find_pin_by_eint_num(pctl, index); - start_level = mtk_gpio_get(pctl->chip, - pin->pin.number); - } - - generic_handle_irq(virq); - - if (dual_edges) { - curr_level = mtk_eint_flip_edge(pctl, index); - - /* If level changed, we might lost one edge - interrupt, raised it through soft-irq */ - if (start_level != curr_level) - writel(BIT(offset), reg - - eint_offsets->stat + - eint_offsets->soft_set); - } - - if (index < pctl->devdata->db_cnt) - mtk_eint_debounce_process(pctl , index); - } - } - chained_irq_exit(chip, desc); -} - static int mtk_pctrl_build_state(struct platform_device *pdev) { struct mtk_pinctrl *pctl = platform_get_drvdata(pdev); @@ -1345,6 +931,101 @@ static int mtk_pctrl_build_state(struct platform_device *pdev) return 0; } +static int +mtk_xt_get_gpio_n(void *data, unsigned long eint_n, unsigned int *gpio_n, + struct gpio_chip **gpio_chip) +{ + struct mtk_pinctrl *pctl = (struct mtk_pinctrl *)data; + const struct mtk_desc_pin *pin; + + pin = mtk_find_pin_by_eint_num(pctl, eint_n); + if (!pin) + return -EINVAL; + + *gpio_chip = pctl->chip; + *gpio_n = pin->pin.number; + + return 0; +} + +static int mtk_xt_get_gpio_state(void *data, unsigned long eint_n) +{ + struct mtk_pinctrl *pctl = (struct mtk_pinctrl *)data; + const struct mtk_desc_pin *pin; + + pin = mtk_find_pin_by_eint_num(pctl, eint_n); + if (!pin) + return -EINVAL; + + return mtk_gpio_get(pctl->chip, pin->pin.number); +} + +static int mtk_xt_set_gpio_as_eint(void *data, unsigned long eint_n) +{ + struct mtk_pinctrl *pctl = (struct mtk_pinctrl *)data; + const struct mtk_desc_pin *pin; + + pin = mtk_find_pin_by_eint_num(pctl, eint_n); + if (!pin) + return -EINVAL; + + /* set mux to INT mode */ + mtk_pmx_set_mode(pctl->pctl_dev, pin->pin.number, pin->eint.eintmux); + /* set gpio direction to input */ + mtk_pmx_gpio_set_direction(pctl->pctl_dev, NULL, pin->pin.number, + true); + /* set input-enable */ + mtk_pconf_set_ies_smt(pctl, pin->pin.number, 1, + PIN_CONFIG_INPUT_ENABLE); + + return 0; +} + +static const struct mtk_eint_xt mtk_eint_xt = { + .get_gpio_n = mtk_xt_get_gpio_n, + .get_gpio_state = mtk_xt_get_gpio_state, + .set_gpio_as_eint = mtk_xt_set_gpio_as_eint, +}; + +static int mtk_eint_init(struct mtk_pinctrl *pctl, struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct resource *res; + + if (!of_property_read_bool(np, "interrupt-controller")) + return -ENODEV; + + pctl->eint = devm_kzalloc(pctl->dev, sizeof(*pctl->eint), GFP_KERNEL); + if (!pctl->eint) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "Unable to get eint resource\n"); + return -ENODEV; + } + + pctl->eint->base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(pctl->eint->base)) + return PTR_ERR(pctl->eint->base); + + pctl->eint->irq = irq_of_parse_and_map(np, 0); + if (!pctl->eint->irq) + return -EINVAL; + + pctl->eint->dev = &pdev->dev; + /* + * If pctl->eint->regs == NULL, it would fall back into using a generic + * register map in mtk_eint_do_init calls. + */ + pctl->eint->regs = pctl->devdata->eint_regs; + pctl->eint->hw = &pctl->devdata->eint_hw; + pctl->eint->pctl = pctl; + pctl->eint->gpio_xlate = &mtk_eint_xt; + + return mtk_eint_do_init(pctl->eint); +} + int mtk_pctrl_init(struct platform_device *pdev, const struct mtk_pinctrl_devdata *data, struct regmap *regmap) @@ -1353,8 +1034,7 @@ int mtk_pctrl_init(struct platform_device *pdev, struct mtk_pinctrl *pctl; struct device_node *np = pdev->dev.of_node, *node; struct property *prop; - struct resource *res; - int i, ret, irq, ports_buf; + int ret, i; pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL); if (!pctl) @@ -1441,70 +1121,10 @@ int mtk_pctrl_init(struct platform_device *pdev, goto chip_error; } - if (!of_property_read_bool(np, "interrupt-controller")) - return 0; - - /* Get EINT register base from dts. */ - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&pdev->dev, "Unable to get Pinctrl resource\n"); - ret = -EINVAL; - goto chip_error; - } - - pctl->eint_reg_base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(pctl->eint_reg_base)) { - ret = -EINVAL; - goto chip_error; - } - - ports_buf = pctl->devdata->eint_offsets.ports; - pctl->wake_mask = devm_kcalloc(&pdev->dev, ports_buf, - sizeof(*pctl->wake_mask), GFP_KERNEL); - if (!pctl->wake_mask) { - ret = -ENOMEM; - goto chip_error; - } - - pctl->cur_mask = devm_kcalloc(&pdev->dev, ports_buf, - sizeof(*pctl->cur_mask), GFP_KERNEL); - if (!pctl->cur_mask) { - ret = -ENOMEM; - goto chip_error; - } - - pctl->eint_dual_edges = devm_kcalloc(&pdev->dev, pctl->devdata->ap_num, - sizeof(int), GFP_KERNEL); - if (!pctl->eint_dual_edges) { - ret = -ENOMEM; - goto chip_error; - } - - irq = irq_of_parse_and_map(np, 0); - if (!irq) { - dev_err(&pdev->dev, "couldn't parse and map irq\n"); - ret = -EINVAL; - goto chip_error; - } - - pctl->domain = irq_domain_add_linear(np, - pctl->devdata->ap_num, &irq_domain_simple_ops, NULL); - if (!pctl->domain) { - dev_err(&pdev->dev, "Couldn't register IRQ domain\n"); - ret = -ENOMEM; + ret = mtk_eint_init(pctl, pdev); + if (ret) goto chip_error; - } - - mtk_eint_init(pctl); - for (i = 0; i < pctl->devdata->ap_num; i++) { - int virq = irq_create_mapping(pctl->domain, i); - - irq_set_chip_and_handler(virq, &mtk_pinctrl_irq_chip, - handle_level_irq); - irq_set_chip_data(virq, pctl); - } - irq_set_chained_handler_and_data(irq, mtk_eint_irq_handler, pctl); return 0; chip_error: |