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Fri, 22 Jun 2018 22:00:48 -0700 (PDT) Received: from localhost.localdomain ([2405:204:70c3:aca:6549:5166:32c7:2dab]) by smtp.gmail.com with ESMTPSA id y14-v6sm10787603pgv.37.2018.06.22.22.00.39 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 22 Jun 2018 22:00:48 -0700 (PDT) From: Manivannan Sadhasivam To: linus.walleij@linaro.org, robh+dt@kernel.org, afaerber@suse.de Subject: [PATCH v2 3/3] pinctrl: actions: Add interrupt support for OWL S900 SoC Date: Sat, 23 Jun 2018 10:29:54 +0530 Message-Id: <20180623045954.6729-4-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180623045954.6729-1-manivannan.sadhasivam@linaro.org> References: <20180623045954.6729-1-manivannan.sadhasivam@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180622_220050_494496_571F7179 X-CRM114-Status: GOOD ( 24.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, daniel.thompson@linaro.org, manivannanece23@gmail.com, jeff.chen@actions-semi.com, hzhang@ucrobotics.com, thomas.liau@actions-semi.com, bdong@ucrobotics.com, liuwei@actions-semi.com, linux-kernel@vger.kernel.org, amit.kucheria@linaro.org, linux-gpio@vger.kernel.org, andy.shevchenko@gmail.com, mp-cs@actions-semi.com, 96boards@ucrobotics.com, Manivannan Sadhasivam , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add interrupt support for Actions Semi OWL S900 SoC. Signed-off-by: Manivannan Sadhasivam Reviewed-by: Andy Shevchenko --- drivers/pinctrl/actions/Kconfig | 1 + drivers/pinctrl/actions/pinctrl-owl.c | 271 ++++++++++++++++++++++++- drivers/pinctrl/actions/pinctrl-owl.h | 22 +- drivers/pinctrl/actions/pinctrl-s900.c | 31 +-- 4 files changed, 307 insertions(+), 18 deletions(-) diff --git a/drivers/pinctrl/actions/Kconfig b/drivers/pinctrl/actions/Kconfig index 490927b4ea76..2397cb0f6011 100644 --- a/drivers/pinctrl/actions/Kconfig +++ b/drivers/pinctrl/actions/Kconfig @@ -5,6 +5,7 @@ config PINCTRL_OWL select PINCONF select GENERIC_PINCONF select GPIOLIB + select GPIOLIB_IRQCHIP help Say Y here to enable Actions Semi OWL pinctrl driver diff --git a/drivers/pinctrl/actions/pinctrl-owl.c b/drivers/pinctrl/actions/pinctrl-owl.c index 76243caa08c6..ce032d71dad5 100644 --- a/drivers/pinctrl/actions/pinctrl-owl.c +++ b/drivers/pinctrl/actions/pinctrl-owl.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -45,6 +46,9 @@ struct owl_pinctrl { struct clk *clk; const struct owl_pinctrl_soc_data *soc; void __iomem *base; + struct irq_chip irq_chip; + unsigned int num_irq; + unsigned int *irq; }; static void owl_update_bits(void __iomem *base, u32 mask, u32 val) @@ -701,10 +705,213 @@ static int owl_gpio_direction_output(struct gpio_chip *chip, return 0; } +static void irq_set_type(struct owl_pinctrl *pctrl, int gpio, unsigned int type) +{ + const struct owl_gpio_port *port; + void __iomem *gpio_base; + unsigned long flags; + unsigned int offset, value, irq_type = 0; + + switch (type) { + case IRQ_TYPE_EDGE_BOTH: + /* + * Since the hardware doesn't support interrupts on both edges, + * emulate it in the software by setting the single edge + * interrupt and switching to the opposite edge while ACKing + * the interrupt + */ + if (owl_gpio_get(&pctrl->chip, gpio)) + irq_type = OWL_GPIO_INT_EDGE_FALLING; + else + irq_type = OWL_GPIO_INT_EDGE_RISING; + break; + + case IRQ_TYPE_EDGE_RISING: + irq_type = OWL_GPIO_INT_EDGE_RISING; + break; + + case IRQ_TYPE_EDGE_FALLING: + irq_type = OWL_GPIO_INT_EDGE_FALLING; + break; + + case IRQ_TYPE_LEVEL_HIGH: + irq_type = OWL_GPIO_INT_LEVEL_HIGH; + break; + + case IRQ_TYPE_LEVEL_LOW: + irq_type = OWL_GPIO_INT_LEVEL_LOW; + break; + + default: + break; + } + + port = owl_gpio_get_port(pctrl, &gpio); + if (WARN_ON(port == NULL)) + return; + + gpio_base = pctrl->base + port->offset; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + offset = (gpio < 16) ? 4 : 0; + value = readl_relaxed(gpio_base + port->intc_type + offset); + value &= ~(OWL_GPIO_INT_MASK << ((gpio % 16) * 2)); + value |= irq_type << ((gpio % 16) * 2); + writel_relaxed(value, gpio_base + port->intc_type + offset); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); +} + +static void owl_gpio_irq_mask(struct irq_data *data) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(data); + struct owl_pinctrl *pctrl = gpiochip_get_data(gc); + const struct owl_gpio_port *port; + void __iomem *gpio_base; + unsigned long flags; + unsigned int gpio = data->hwirq; + u32 val; + + port = owl_gpio_get_port(pctrl, &gpio); + if (WARN_ON(port == NULL)) + return; + + gpio_base = pctrl->base + port->offset; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + owl_gpio_update_reg(gpio_base + port->intc_msk, gpio, false); + + /* disable port interrupt if no interrupt pending bit is active */ + val = readl_relaxed(gpio_base + port->intc_msk); + if (val == 0) + owl_gpio_update_reg(gpio_base + port->intc_ctl, + OWL_GPIO_CTLR_ENABLE, false); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); +} + +static void owl_gpio_irq_unmask(struct irq_data *data) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(data); + struct owl_pinctrl *pctrl = gpiochip_get_data(gc); + const struct owl_gpio_port *port; + void __iomem *gpio_base; + unsigned long flags; + unsigned int gpio = data->hwirq; + u32 value; + + port = owl_gpio_get_port(pctrl, &gpio); + if (WARN_ON(port == NULL)) + return; + + gpio_base = pctrl->base + port->offset; + raw_spin_lock_irqsave(&pctrl->lock, flags); + + /* enable port interrupt */ + value = readl_relaxed(gpio_base + port->intc_ctl); + value |= BIT(OWL_GPIO_CTLR_ENABLE) | BIT(OWL_GPIO_CTLR_SAMPLE_CLK_24M); + writel_relaxed(value, gpio_base + port->intc_ctl); + + /* enable GPIO interrupt */ + owl_gpio_update_reg(gpio_base + port->intc_msk, gpio, true); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); +} + +static void owl_gpio_irq_ack(struct irq_data *data) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(data); + struct owl_pinctrl *pctrl = gpiochip_get_data(gc); + const struct owl_gpio_port *port; + void __iomem *gpio_base; + unsigned long flags; + unsigned int gpio = data->hwirq; + + /* + * Switch the interrupt edge to the opposite edge of the interrupt + * which got triggered for the case of emulating both edges + */ + if (irqd_get_trigger_type(data) == IRQ_TYPE_EDGE_BOTH) { + if (owl_gpio_get(gc, gpio)) + irq_set_type(pctrl, gpio, IRQ_TYPE_EDGE_FALLING); + else + irq_set_type(pctrl, gpio, IRQ_TYPE_EDGE_RISING); + } + + port = owl_gpio_get_port(pctrl, &gpio); + if (WARN_ON(port == NULL)) + return; + + gpio_base = pctrl->base + port->offset; + + raw_spin_lock_irqsave(&pctrl->lock, flags); + + owl_gpio_update_reg(gpio_base + port->intc_ctl, + OWL_GPIO_CTLR_PENDING, true); + + raw_spin_unlock_irqrestore(&pctrl->lock, flags); +} + +static int owl_gpio_irq_set_type(struct irq_data *data, unsigned int type) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(data); + struct owl_pinctrl *pctrl = gpiochip_get_data(gc); + + if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH)) + irq_set_handler_locked(data, handle_level_irq); + else + irq_set_handler_locked(data, handle_edge_irq); + + irq_set_type(pctrl, data->hwirq, type); + + return 0; +} + +static void owl_gpio_irq_handler(struct irq_desc *desc) +{ + struct owl_pinctrl *pctrl = irq_desc_get_handler_data(desc); + struct irq_chip *chip = irq_desc_get_chip(desc); + struct irq_domain *domain = pctrl->chip.irq.domain; + unsigned int parent = irq_desc_get_irq(desc); + const struct owl_gpio_port *port; + void __iomem *base; + unsigned int pin, irq, offset = 0, i; + unsigned long pending_irq; + + chained_irq_enter(chip, desc); + + for (i = 0; i < pctrl->soc->nports; i++) { + port = &pctrl->soc->ports[i]; + base = pctrl->base + port->offset; + + /* skip ports that are not associated with this irq */ + if (parent != pctrl->irq[i]) + goto skip; + + pending_irq = readl_relaxed(base + port->intc_pd); + + for_each_set_bit(pin, &pending_irq, port->pins) { + irq = irq_find_mapping(domain, offset + pin); + generic_handle_irq(irq); + + /* clear pending interrupt */ + owl_gpio_update_reg(base + port->intc_pd, pin, true); + } + +skip: + offset += port->pins; + } + + chained_irq_exit(chip, desc); +} + static int owl_gpio_init(struct owl_pinctrl *pctrl) { struct gpio_chip *chip; - int ret; + struct gpio_irq_chip *gpio_irq; + int ret, i, j, offset; chip = &pctrl->chip; chip->base = -1; @@ -714,6 +921,35 @@ static int owl_gpio_init(struct owl_pinctrl *pctrl) chip->owner = THIS_MODULE; chip->of_node = pctrl->dev->of_node; + pctrl->irq_chip.name = chip->of_node->name; + pctrl->irq_chip.irq_ack = owl_gpio_irq_ack; + pctrl->irq_chip.irq_mask = owl_gpio_irq_mask; + pctrl->irq_chip.irq_unmask = owl_gpio_irq_unmask; + pctrl->irq_chip.irq_set_type = owl_gpio_irq_set_type; + + gpio_irq = &chip->irq; + gpio_irq->chip = &pctrl->irq_chip; + gpio_irq->handler = handle_simple_irq; + gpio_irq->default_type = IRQ_TYPE_NONE; + gpio_irq->parent_handler = owl_gpio_irq_handler; + gpio_irq->parent_handler_data = pctrl; + gpio_irq->num_parents = pctrl->num_irq; + gpio_irq->parents = pctrl->irq; + + gpio_irq->map = devm_kcalloc(pctrl->dev, chip->ngpio, + sizeof(*gpio_irq->map), GFP_KERNEL); + if (!gpio_irq->map) + return -ENOMEM; + + for (i = 0, offset = 0; i < pctrl->soc->nports; i++) { + const struct owl_gpio_port *port = &pctrl->soc->ports[i]; + + for (j = 0; j < port->pins; j++) + gpio_irq->map[offset + j] = gpio_irq->parents[i]; + + offset += port->pins; + } + ret = gpiochip_add_data(&pctrl->chip, pctrl); if (ret) { dev_err(pctrl->dev, "failed to register gpiochip\n"); @@ -728,7 +964,7 @@ int owl_pinctrl_probe(struct platform_device *pdev, { struct resource *res; struct owl_pinctrl *pctrl; - int ret; + int ret, i; pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL); if (!pctrl) @@ -772,14 +1008,41 @@ int owl_pinctrl_probe(struct platform_device *pdev, &owl_pinctrl_desc, pctrl); if (IS_ERR(pctrl->pctrldev)) { dev_err(&pdev->dev, "could not register Actions OWL pinmux driver\n"); - return PTR_ERR(pctrl->pctrldev); + ret = PTR_ERR(pctrl->pctrldev); + goto err_exit; + } + + ret = platform_irq_count(pdev); + if (ret < 0) + goto err_exit; + + pctrl->num_irq = ret; + + pctrl->irq = devm_kcalloc(&pdev->dev, pctrl->num_irq, + sizeof(*pctrl->irq), GFP_KERNEL); + if (!pctrl->irq) { + ret = -ENOMEM; + goto err_exit; + } + + for (i = 0; i < pctrl->num_irq ; i++) { + pctrl->irq[i] = platform_get_irq(pdev, i); + if (pctrl->irq[i] < 0) { + ret = pctrl->irq[i]; + goto err_exit; + } } ret = owl_gpio_init(pctrl); if (ret) - return ret; + goto err_exit; platform_set_drvdata(pdev, pctrl); return 0; + +err_exit: + clk_disable_unprepare(pctrl->clk); + + return ret; } diff --git a/drivers/pinctrl/actions/pinctrl-owl.h b/drivers/pinctrl/actions/pinctrl-owl.h index 74342378937c..a724d1d406d4 100644 --- a/drivers/pinctrl/actions/pinctrl-owl.h +++ b/drivers/pinctrl/actions/pinctrl-owl.h @@ -29,6 +29,18 @@ enum owl_pinconf_drv { OWL_PINCONF_DRV_12MA, }; +/* GPIO CTRL Bit Definition */ +#define OWL_GPIO_CTLR_PENDING 0 +#define OWL_GPIO_CTLR_ENABLE 1 +#define OWL_GPIO_CTLR_SAMPLE_CLK_24M 2 + +/* GPIO TYPE Bit Definition */ +#define OWL_GPIO_INT_LEVEL_HIGH 0 +#define OWL_GPIO_INT_LEVEL_LOW 1 +#define OWL_GPIO_INT_EDGE_RISING 2 +#define OWL_GPIO_INT_EDGE_FALLING 3 +#define OWL_GPIO_INT_MASK 3 + /** * struct owl_pullctl - Actions pad pull control register * @reg: offset to the pull control register @@ -121,6 +133,10 @@ struct owl_pinmux_func { * @outen: offset of the output enable register. * @inen: offset of the input enable register. * @dat: offset of the data register. + * @intc_ctl: offset of the interrupt control register. + * @intc_pd: offset of the interrupt pending register. + * @intc_msk: offset of the interrupt mask register. + * @intc_type: offset of the interrupt type register. */ struct owl_gpio_port { unsigned int offset; @@ -128,6 +144,10 @@ struct owl_gpio_port { unsigned int outen; unsigned int inen; unsigned int dat; + unsigned int intc_ctl; + unsigned int intc_pd; + unsigned int intc_msk; + unsigned int intc_type; }; /** @@ -140,7 +160,7 @@ struct owl_gpio_port { * @ngroups: number of entries in @groups. * @padinfo: array describing the pad info of this SoC. * @ngpios: number of pingroups the driver should expose as GPIOs. - * @port: array describing all GPIO ports of this SoC. + * @ports: array describing all GPIO ports of this SoC. * @nports: number of GPIO ports in this SoC. */ struct owl_pinctrl_soc_data { diff --git a/drivers/pinctrl/actions/pinctrl-s900.c b/drivers/pinctrl/actions/pinctrl-s900.c index 5503c7945764..ea67b14ef93b 100644 --- a/drivers/pinctrl/actions/pinctrl-s900.c +++ b/drivers/pinctrl/actions/pinctrl-s900.c @@ -1821,22 +1821,27 @@ static struct owl_padinfo s900_padinfo[NUM_PADS] = { [SGPIO3] = PAD_INFO_PULLCTL_ST(SGPIO3) }; -#define OWL_GPIO_PORT(port, base, count, _outen, _inen, _dat) \ - [OWL_GPIO_PORT_##port] = { \ - .offset = base, \ - .pins = count, \ - .outen = _outen, \ - .inen = _inen, \ - .dat = _dat, \ +#define OWL_GPIO_PORT(port, base, count, _outen, _inen, _dat, \ + _intc_ctl, _intc_pd, _intc_msk, _intc_type) \ + [OWL_GPIO_PORT_##port] = { \ + .offset = base, \ + .pins = count, \ + .outen = _outen, \ + .inen = _inen, \ + .dat = _dat, \ + .intc_ctl = _intc_ctl, \ + .intc_pd = _intc_pd, \ + .intc_msk = _intc_msk, \ + .intc_type = _intc_type, \ } static const struct owl_gpio_port s900_gpio_ports[] = { - OWL_GPIO_PORT(A, 0x0000, 32, 0x0, 0x4, 0x8), - OWL_GPIO_PORT(B, 0x000C, 32, 0x0, 0x4, 0x8), - OWL_GPIO_PORT(C, 0x0018, 12, 0x0, 0x4, 0x8), - OWL_GPIO_PORT(D, 0x0024, 30, 0x0, 0x4, 0x8), - OWL_GPIO_PORT(E, 0x0030, 32, 0x0, 0x4, 0x8), - OWL_GPIO_PORT(F, 0x00F0, 8, 0x0, 0x4, 0x8) + OWL_GPIO_PORT(A, 0x0000, 32, 0x0, 0x4, 0x8, 0x204, 0x208, 0x20C, 0x240), + OWL_GPIO_PORT(B, 0x000C, 32, 0x0, 0x4, 0x8, 0x534, 0x204, 0x208, 0x23C), + OWL_GPIO_PORT(C, 0x0018, 12, 0x0, 0x4, 0x8, 0x52C, 0x200, 0x204, 0x238), + OWL_GPIO_PORT(D, 0x0024, 30, 0x0, 0x4, 0x8, 0x524, 0x1FC, 0x200, 0x234), + OWL_GPIO_PORT(E, 0x0030, 32, 0x0, 0x4, 0x8, 0x51C, 0x1F8, 0x1FC, 0x230), + OWL_GPIO_PORT(F, 0x00F0, 8, 0x0, 0x4, 0x8, 0x460, 0x140, 0x144, 0x178) }; static struct owl_pinctrl_soc_data s900_pinctrl_data = {