L: linux-gpio@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/pinctrl/starfive,jh71*.yaml
-F: drivers/pinctrl/starfive/
+F: drivers/pinctrl/starfive/pinctrl-starfive-jh71*
F: include/dt-bindings/pinctrl/pinctrl-starfive-jh7100.h
F: include/dt-bindings/pinctrl/starfive,jh7110-pinctrl.h
This also provides an interface to the GPIO pins not used by other
peripherals supporting inputs, outputs, configuring pull-up/pull-down
and interrupts on input changes.
+
+config PINCTRL_STARFIVE_JH7110
+ bool
+ select GENERIC_PINCTRL_GROUPS
+ select GENERIC_PINMUX_FUNCTIONS
+ select GENERIC_PINCONF
+ select GPIOLIB
+ select GPIOLIB_IRQCHIP
+ select OF_GPIO
+
+config PINCTRL_STARFIVE_JH7110_SYS
+ tristate "System pinctrl and GPIO driver for the StarFive JH7110 SoC"
+ depends on SOC_STARFIVE || COMPILE_TEST
+ depends on OF
+ select PINCTRL_STARFIVE_JH7110
+ default SOC_STARFIVE
+ help
+ Say yes here to support system pin control on the StarFive JH7110 SoC.
+ This also provides an interface to the GPIO pins not used by other
+ peripherals supporting inputs, outputs, configuring pull-up/pull-down
+ and interrupts on input changes.
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_PINCTRL_STARFIVE_JH7100) += pinctrl-starfive-jh7100.o
+
+obj-$(CONFIG_PINCTRL_STARFIVE_JH7110) += pinctrl-starfive-jh7110.o
+obj-$(CONFIG_PINCTRL_STARFIVE_JH7110_SYS) += pinctrl-starfive-jh7110-sys.o
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Pinctrl / GPIO driver for StarFive JH7110 SoC sys controller
+ *
+ * Copyright (C) 2022 Emil Renner Berthing <kernel@esmil.dk>
+ * Copyright (C) 2022 StarFive Technology Co., Ltd.
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/gpio/driver.h>
+#include <linux/io.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <linux/spinlock.h>
+
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
+#include <dt-bindings/pinctrl/starfive,jh7110-pinctrl.h>
+
+#include "../core.h"
+#include "../pinctrl-utils.h"
+#include "../pinmux.h"
+#include "../pinconf.h"
+#include "pinctrl-starfive-jh7110.h"
+
+#define JH7110_SYS_NGPIO 64
+#define JH7110_SYS_GC_BASE 0
+
+/* registers */
+#define JH7110_SYS_DOEN 0x000
+#define JH7110_SYS_DOUT 0x040
+#define JH7110_SYS_GPI 0x080
+#define JH7110_SYS_GPIOIN 0x118
+
+#define JH7110_SYS_GPIOEN 0x0dc
+#define JH7110_SYS_GPIOIS0 0x0e0
+#define JH7110_SYS_GPIOIS1 0x0e4
+#define JH7110_SYS_GPIOIC0 0x0e8
+#define JH7110_SYS_GPIOIC1 0x0ec
+#define JH7110_SYS_GPIOIBE0 0x0f0
+#define JH7110_SYS_GPIOIBE1 0x0f4
+#define JH7110_SYS_GPIOIEV0 0x0f8
+#define JH7110_SYS_GPIOIEV1 0x0fc
+#define JH7110_SYS_GPIOIE0 0x100
+#define JH7110_SYS_GPIOIE1 0x104
+#define JH7110_SYS_GPIORIS0 0x108
+#define JH7110_SYS_GPIORIS1 0x10c
+#define JH7110_SYS_GPIOMIS0 0x110
+#define JH7110_SYS_GPIOMIS1 0x114
+
+#define JH7110_SYS_GPO_PDA_0_74_CFG 0x120
+#define JH7110_SYS_GPO_PDA_89_94_CFG 0x284
+
+static const struct pinctrl_pin_desc jh7110_sys_pins[] = {
+ PINCTRL_PIN(PAD_GPIO0, "GPIO0"),
+ PINCTRL_PIN(PAD_GPIO1, "GPIO1"),
+ PINCTRL_PIN(PAD_GPIO2, "GPIO2"),
+ PINCTRL_PIN(PAD_GPIO3, "GPIO3"),
+ PINCTRL_PIN(PAD_GPIO4, "GPIO4"),
+ PINCTRL_PIN(PAD_GPIO5, "GPIO5"),
+ PINCTRL_PIN(PAD_GPIO6, "GPIO6"),
+ PINCTRL_PIN(PAD_GPIO7, "GPIO7"),
+ PINCTRL_PIN(PAD_GPIO8, "GPIO8"),
+ PINCTRL_PIN(PAD_GPIO9, "GPIO9"),
+ PINCTRL_PIN(PAD_GPIO10, "GPIO10"),
+ PINCTRL_PIN(PAD_GPIO11, "GPIO11"),
+ PINCTRL_PIN(PAD_GPIO12, "GPIO12"),
+ PINCTRL_PIN(PAD_GPIO13, "GPIO13"),
+ PINCTRL_PIN(PAD_GPIO14, "GPIO14"),
+ PINCTRL_PIN(PAD_GPIO15, "GPIO15"),
+ PINCTRL_PIN(PAD_GPIO16, "GPIO16"),
+ PINCTRL_PIN(PAD_GPIO17, "GPIO17"),
+ PINCTRL_PIN(PAD_GPIO18, "GPIO18"),
+ PINCTRL_PIN(PAD_GPIO19, "GPIO19"),
+ PINCTRL_PIN(PAD_GPIO20, "GPIO20"),
+ PINCTRL_PIN(PAD_GPIO21, "GPIO21"),
+ PINCTRL_PIN(PAD_GPIO22, "GPIO22"),
+ PINCTRL_PIN(PAD_GPIO23, "GPIO23"),
+ PINCTRL_PIN(PAD_GPIO24, "GPIO24"),
+ PINCTRL_PIN(PAD_GPIO25, "GPIO25"),
+ PINCTRL_PIN(PAD_GPIO26, "GPIO26"),
+ PINCTRL_PIN(PAD_GPIO27, "GPIO27"),
+ PINCTRL_PIN(PAD_GPIO28, "GPIO28"),
+ PINCTRL_PIN(PAD_GPIO29, "GPIO29"),
+ PINCTRL_PIN(PAD_GPIO30, "GPIO30"),
+ PINCTRL_PIN(PAD_GPIO31, "GPIO31"),
+ PINCTRL_PIN(PAD_GPIO32, "GPIO32"),
+ PINCTRL_PIN(PAD_GPIO33, "GPIO33"),
+ PINCTRL_PIN(PAD_GPIO34, "GPIO34"),
+ PINCTRL_PIN(PAD_GPIO35, "GPIO35"),
+ PINCTRL_PIN(PAD_GPIO36, "GPIO36"),
+ PINCTRL_PIN(PAD_GPIO37, "GPIO37"),
+ PINCTRL_PIN(PAD_GPIO38, "GPIO38"),
+ PINCTRL_PIN(PAD_GPIO39, "GPIO39"),
+ PINCTRL_PIN(PAD_GPIO40, "GPIO40"),
+ PINCTRL_PIN(PAD_GPIO41, "GPIO41"),
+ PINCTRL_PIN(PAD_GPIO42, "GPIO42"),
+ PINCTRL_PIN(PAD_GPIO43, "GPIO43"),
+ PINCTRL_PIN(PAD_GPIO44, "GPIO44"),
+ PINCTRL_PIN(PAD_GPIO45, "GPIO45"),
+ PINCTRL_PIN(PAD_GPIO46, "GPIO46"),
+ PINCTRL_PIN(PAD_GPIO47, "GPIO47"),
+ PINCTRL_PIN(PAD_GPIO48, "GPIO48"),
+ PINCTRL_PIN(PAD_GPIO49, "GPIO49"),
+ PINCTRL_PIN(PAD_GPIO50, "GPIO50"),
+ PINCTRL_PIN(PAD_GPIO51, "GPIO51"),
+ PINCTRL_PIN(PAD_GPIO52, "GPIO52"),
+ PINCTRL_PIN(PAD_GPIO53, "GPIO53"),
+ PINCTRL_PIN(PAD_GPIO54, "GPIO54"),
+ PINCTRL_PIN(PAD_GPIO55, "GPIO55"),
+ PINCTRL_PIN(PAD_GPIO56, "GPIO56"),
+ PINCTRL_PIN(PAD_GPIO57, "GPIO57"),
+ PINCTRL_PIN(PAD_GPIO58, "GPIO58"),
+ PINCTRL_PIN(PAD_GPIO59, "GPIO59"),
+ PINCTRL_PIN(PAD_GPIO60, "GPIO60"),
+ PINCTRL_PIN(PAD_GPIO61, "GPIO61"),
+ PINCTRL_PIN(PAD_GPIO62, "GPIO62"),
+ PINCTRL_PIN(PAD_GPIO63, "GPIO63"),
+ PINCTRL_PIN(PAD_SD0_CLK, "SD0_CLK"),
+ PINCTRL_PIN(PAD_SD0_CMD, "SD0_CMD"),
+ PINCTRL_PIN(PAD_SD0_DATA0, "SD0_DATA0"),
+ PINCTRL_PIN(PAD_SD0_DATA1, "SD0_DATA1"),
+ PINCTRL_PIN(PAD_SD0_DATA2, "SD0_DATA2"),
+ PINCTRL_PIN(PAD_SD0_DATA3, "SD0_DATA3"),
+ PINCTRL_PIN(PAD_SD0_DATA4, "SD0_DATA4"),
+ PINCTRL_PIN(PAD_SD0_DATA5, "SD0_DATA5"),
+ PINCTRL_PIN(PAD_SD0_DATA6, "SD0_DATA6"),
+ PINCTRL_PIN(PAD_SD0_DATA7, "SD0_DATA7"),
+ PINCTRL_PIN(PAD_SD0_STRB, "SD0_STRB"),
+ PINCTRL_PIN(PAD_GMAC1_MDC, "GMAC1_MDC"),
+ PINCTRL_PIN(PAD_GMAC1_MDIO, "GMAC1_MDIO"),
+ PINCTRL_PIN(PAD_GMAC1_RXD0, "GMAC1_RXD0"),
+ PINCTRL_PIN(PAD_GMAC1_RXD1, "GMAC1_RXD1"),
+ PINCTRL_PIN(PAD_GMAC1_RXD2, "GMAC1_RXD2"),
+ PINCTRL_PIN(PAD_GMAC1_RXD3, "GMAC1_RXD3"),
+ PINCTRL_PIN(PAD_GMAC1_RXDV, "GMAC1_RXDV"),
+ PINCTRL_PIN(PAD_GMAC1_RXC, "GMAC1_RXC"),
+ PINCTRL_PIN(PAD_GMAC1_TXD0, "GMAC1_TXD0"),
+ PINCTRL_PIN(PAD_GMAC1_TXD1, "GMAC1_TXD1"),
+ PINCTRL_PIN(PAD_GMAC1_TXD2, "GMAC1_TXD2"),
+ PINCTRL_PIN(PAD_GMAC1_TXD3, "GMAC1_TXD3"),
+ PINCTRL_PIN(PAD_GMAC1_TXEN, "GMAC1_TXEN"),
+ PINCTRL_PIN(PAD_GMAC1_TXC, "GMAC1_TXC"),
+ PINCTRL_PIN(PAD_QSPI_SCLK, "QSPI_SCLK"),
+ PINCTRL_PIN(PAD_QSPI_CS0, "QSPI_CS0"),
+ PINCTRL_PIN(PAD_QSPI_DATA0, "QSPI_DATA0"),
+ PINCTRL_PIN(PAD_QSPI_DATA1, "QSPI_DATA1"),
+ PINCTRL_PIN(PAD_QSPI_DATA2, "QSPI_DATA2"),
+ PINCTRL_PIN(PAD_QSPI_DATA3, "QSPI_DATA3"),
+};
+
+struct jh7110_func_sel {
+ u16 offset;
+ u8 shift;
+ u8 max;
+};
+
+static const struct jh7110_func_sel
+ jh7110_sys_func_sel[ARRAY_SIZE(jh7110_sys_pins)] = {
+ [PAD_GMAC1_RXC] = { 0x29c, 0, 1 },
+ [PAD_GPIO10] = { 0x29c, 2, 3 },
+ [PAD_GPIO11] = { 0x29c, 5, 3 },
+ [PAD_GPIO12] = { 0x29c, 8, 3 },
+ [PAD_GPIO13] = { 0x29c, 11, 3 },
+ [PAD_GPIO14] = { 0x29c, 14, 3 },
+ [PAD_GPIO15] = { 0x29c, 17, 3 },
+ [PAD_GPIO16] = { 0x29c, 20, 3 },
+ [PAD_GPIO17] = { 0x29c, 23, 3 },
+ [PAD_GPIO18] = { 0x29c, 26, 3 },
+ [PAD_GPIO19] = { 0x29c, 29, 3 },
+
+ [PAD_GPIO20] = { 0x2a0, 0, 3 },
+ [PAD_GPIO21] = { 0x2a0, 3, 3 },
+ [PAD_GPIO22] = { 0x2a0, 6, 3 },
+ [PAD_GPIO23] = { 0x2a0, 9, 3 },
+ [PAD_GPIO24] = { 0x2a0, 12, 3 },
+ [PAD_GPIO25] = { 0x2a0, 15, 3 },
+ [PAD_GPIO26] = { 0x2a0, 18, 3 },
+ [PAD_GPIO27] = { 0x2a0, 21, 3 },
+ [PAD_GPIO28] = { 0x2a0, 24, 3 },
+ [PAD_GPIO29] = { 0x2a0, 27, 3 },
+
+ [PAD_GPIO30] = { 0x2a4, 0, 3 },
+ [PAD_GPIO31] = { 0x2a4, 3, 3 },
+ [PAD_GPIO32] = { 0x2a4, 6, 3 },
+ [PAD_GPIO33] = { 0x2a4, 9, 3 },
+ [PAD_GPIO34] = { 0x2a4, 12, 3 },
+ [PAD_GPIO35] = { 0x2a4, 15, 3 },
+ [PAD_GPIO36] = { 0x2a4, 17, 3 },
+ [PAD_GPIO37] = { 0x2a4, 20, 3 },
+ [PAD_GPIO38] = { 0x2a4, 23, 3 },
+ [PAD_GPIO39] = { 0x2a4, 26, 3 },
+ [PAD_GPIO40] = { 0x2a4, 29, 3 },
+
+ [PAD_GPIO41] = { 0x2a8, 0, 3 },
+ [PAD_GPIO42] = { 0x2a8, 3, 3 },
+ [PAD_GPIO43] = { 0x2a8, 6, 3 },
+ [PAD_GPIO44] = { 0x2a8, 9, 3 },
+ [PAD_GPIO45] = { 0x2a8, 12, 3 },
+ [PAD_GPIO46] = { 0x2a8, 15, 3 },
+ [PAD_GPIO47] = { 0x2a8, 18, 3 },
+ [PAD_GPIO48] = { 0x2a8, 21, 3 },
+ [PAD_GPIO49] = { 0x2a8, 24, 3 },
+ [PAD_GPIO50] = { 0x2a8, 27, 3 },
+ [PAD_GPIO51] = { 0x2a8, 30, 3 },
+
+ [PAD_GPIO52] = { 0x2ac, 0, 3 },
+ [PAD_GPIO53] = { 0x2ac, 2, 3 },
+ [PAD_GPIO54] = { 0x2ac, 4, 3 },
+ [PAD_GPIO55] = { 0x2ac, 6, 3 },
+ [PAD_GPIO56] = { 0x2ac, 9, 3 },
+ [PAD_GPIO57] = { 0x2ac, 12, 3 },
+ [PAD_GPIO58] = { 0x2ac, 15, 3 },
+ [PAD_GPIO59] = { 0x2ac, 18, 3 },
+ [PAD_GPIO60] = { 0x2ac, 21, 3 },
+ [PAD_GPIO61] = { 0x2ac, 24, 3 },
+ [PAD_GPIO62] = { 0x2ac, 27, 3 },
+ [PAD_GPIO63] = { 0x2ac, 30, 3 },
+
+ [PAD_GPIO6] = { 0x2b0, 0, 3 },
+ [PAD_GPIO7] = { 0x2b0, 2, 3 },
+ [PAD_GPIO8] = { 0x2b0, 5, 3 },
+ [PAD_GPIO9] = { 0x2b0, 8, 3 },
+};
+
+struct jh7110_vin_group_sel {
+ u16 offset;
+ u8 shift;
+ u8 group;
+};
+
+static const struct jh7110_vin_group_sel
+ jh7110_sys_vin_group_sel[ARRAY_SIZE(jh7110_sys_pins)] = {
+ [PAD_GPIO6] = { 0x2b4, 21, 0 },
+ [PAD_GPIO7] = { 0x2b4, 18, 0 },
+ [PAD_GPIO8] = { 0x2b4, 15, 0 },
+ [PAD_GPIO9] = { 0x2b0, 11, 0 },
+ [PAD_GPIO10] = { 0x2b0, 20, 0 },
+ [PAD_GPIO11] = { 0x2b0, 23, 0 },
+ [PAD_GPIO12] = { 0x2b0, 26, 0 },
+ [PAD_GPIO13] = { 0x2b0, 29, 0 },
+ [PAD_GPIO14] = { 0x2b4, 0, 0 },
+ [PAD_GPIO15] = { 0x2b4, 3, 0 },
+ [PAD_GPIO16] = { 0x2b4, 6, 0 },
+ [PAD_GPIO17] = { 0x2b4, 9, 0 },
+ [PAD_GPIO18] = { 0x2b4, 12, 0 },
+ [PAD_GPIO19] = { 0x2b0, 14, 0 },
+ [PAD_GPIO20] = { 0x2b0, 17, 0 },
+
+ [PAD_GPIO21] = { 0x2b4, 21, 1 },
+ [PAD_GPIO22] = { 0x2b4, 18, 1 },
+ [PAD_GPIO23] = { 0x2b4, 15, 1 },
+ [PAD_GPIO24] = { 0x2b0, 11, 1 },
+ [PAD_GPIO25] = { 0x2b0, 20, 1 },
+ [PAD_GPIO26] = { 0x2b0, 23, 1 },
+ [PAD_GPIO27] = { 0x2b0, 26, 1 },
+ [PAD_GPIO28] = { 0x2b0, 29, 1 },
+ [PAD_GPIO29] = { 0x2b4, 0, 1 },
+ [PAD_GPIO30] = { 0x2b4, 3, 1 },
+ [PAD_GPIO31] = { 0x2b4, 6, 1 },
+ [PAD_GPIO32] = { 0x2b4, 9, 1 },
+ [PAD_GPIO33] = { 0x2b4, 12, 1 },
+ [PAD_GPIO34] = { 0x2b0, 14, 1 },
+ [PAD_GPIO35] = { 0x2b0, 17, 1 },
+
+ [PAD_GPIO36] = { 0x2b4, 21, 2 },
+ [PAD_GPIO37] = { 0x2b4, 18, 2 },
+ [PAD_GPIO38] = { 0x2b4, 15, 2 },
+ [PAD_GPIO39] = { 0x2b0, 11, 2 },
+ [PAD_GPIO40] = { 0x2b0, 20, 2 },
+ [PAD_GPIO41] = { 0x2b0, 23, 2 },
+ [PAD_GPIO42] = { 0x2b0, 26, 2 },
+ [PAD_GPIO43] = { 0x2b0, 29, 2 },
+ [PAD_GPIO44] = { 0x2b4, 0, 2 },
+ [PAD_GPIO45] = { 0x2b4, 3, 2 },
+ [PAD_GPIO46] = { 0x2b4, 6, 2 },
+ [PAD_GPIO47] = { 0x2b4, 9, 2 },
+ [PAD_GPIO48] = { 0x2b4, 12, 2 },
+ [PAD_GPIO49] = { 0x2b0, 14, 2 },
+ [PAD_GPIO50] = { 0x2b0, 17, 2 },
+};
+
+static void jh7110_set_function(struct jh7110_pinctrl *sfp,
+ unsigned int pin, u32 func)
+{
+ const struct jh7110_func_sel *fs = &jh7110_sys_func_sel[pin];
+ unsigned long flags;
+ void __iomem *reg;
+ u32 mask;
+
+ if (!fs->offset)
+ return;
+
+ if (func > fs->max)
+ return;
+
+ reg = sfp->base + fs->offset;
+ func = func << fs->shift;
+ mask = 0x3U << fs->shift;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ func |= readl_relaxed(reg) & ~mask;
+ writel_relaxed(func, reg);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static void jh7110_set_vin_group(struct jh7110_pinctrl *sfp,
+ unsigned int pin)
+{
+ const struct jh7110_vin_group_sel *gs = &jh7110_sys_vin_group_sel[pin];
+ unsigned long flags;
+ void __iomem *reg;
+ u32 mask;
+ u32 grp;
+
+ if (!gs->offset)
+ return;
+
+ reg = sfp->base + gs->offset;
+ grp = gs->group << gs->shift;
+ mask = 0x3U << gs->shift;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ grp |= readl_relaxed(reg) & ~mask;
+ writel_relaxed(grp, reg);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static int jh7110_sys_set_one_pin_mux(struct jh7110_pinctrl *sfp,
+ unsigned int pin,
+ unsigned int din, u32 dout,
+ u32 doen, u32 func)
+{
+ if (pin < sfp->gc.ngpio && func == 0)
+ jh7110_set_gpiomux(sfp, pin, din, dout, doen);
+
+ jh7110_set_function(sfp, pin, func);
+
+ if (pin < sfp->gc.ngpio && func == 2)
+ jh7110_set_vin_group(sfp, pin);
+
+ return 0;
+}
+
+static int jh7110_sys_get_padcfg_base(struct jh7110_pinctrl *sfp,
+ unsigned int pin)
+{
+ if (pin < PAD_GMAC1_MDC)
+ return JH7110_SYS_GPO_PDA_0_74_CFG;
+ else if (pin > PAD_GMAC1_TXC && pin <= PAD_QSPI_DATA3)
+ return JH7110_SYS_GPO_PDA_89_94_CFG;
+ else
+ return -1;
+}
+
+static void jh7110_sys_irq_handler(struct irq_desc *desc)
+{
+ struct jh7110_pinctrl *sfp = jh7110_from_irq_desc(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ unsigned long mis;
+ unsigned int pin;
+
+ chained_irq_enter(chip, desc);
+
+ mis = readl_relaxed(sfp->base + JH7110_SYS_GPIOMIS0);
+ for_each_set_bit(pin, &mis, 32)
+ generic_handle_domain_irq(sfp->gc.irq.domain, pin);
+
+ mis = readl_relaxed(sfp->base + JH7110_SYS_GPIOMIS1);
+ for_each_set_bit(pin, &mis, 32)
+ generic_handle_domain_irq(sfp->gc.irq.domain, pin + 32);
+
+ chained_irq_exit(chip, desc);
+}
+
+static int jh7110_sys_init_hw(struct gpio_chip *gc)
+{
+ struct jh7110_pinctrl *sfp = container_of(gc,
+ struct jh7110_pinctrl, gc);
+
+ /* mask all GPIO interrupts */
+ writel(0U, sfp->base + JH7110_SYS_GPIOIE0);
+ writel(0U, sfp->base + JH7110_SYS_GPIOIE1);
+ /* clear edge interrupt flags */
+ writel(~0U, sfp->base + JH7110_SYS_GPIOIC0);
+ writel(~0U, sfp->base + JH7110_SYS_GPIOIC1);
+ /* enable GPIO interrupts */
+ writel(1U, sfp->base + JH7110_SYS_GPIOEN);
+ return 0;
+}
+
+static const struct jh7110_gpio_irq_reg jh7110_sys_irq_reg = {
+ .is_reg_base = JH7110_SYS_GPIOIS0,
+ .ic_reg_base = JH7110_SYS_GPIOIC0,
+ .ibe_reg_base = JH7110_SYS_GPIOIBE0,
+ .iev_reg_base = JH7110_SYS_GPIOIEV0,
+ .ie_reg_base = JH7110_SYS_GPIOIE0,
+ .ris_reg_base = JH7110_SYS_GPIORIS0,
+ .mis_reg_base = JH7110_SYS_GPIOMIS0,
+};
+
+static const struct jh7110_pinctrl_soc_info jh7110_sys_pinctrl_info = {
+ .pins = jh7110_sys_pins,
+ .npins = ARRAY_SIZE(jh7110_sys_pins),
+ .ngpios = JH7110_SYS_NGPIO,
+ .gc_base = JH7110_SYS_GC_BASE,
+ .dout_reg_base = JH7110_SYS_DOUT,
+ .dout_mask = GENMASK(6, 0),
+ .doen_reg_base = JH7110_SYS_DOEN,
+ .doen_mask = GENMASK(5, 0),
+ .gpi_reg_base = JH7110_SYS_GPI,
+ .gpi_mask = GENMASK(6, 0),
+ .gpioin_reg_base = JH7110_SYS_GPIOIN,
+ .irq_reg = &jh7110_sys_irq_reg,
+ .jh7110_set_one_pin_mux = jh7110_sys_set_one_pin_mux,
+ .jh7110_get_padcfg_base = jh7110_sys_get_padcfg_base,
+ .jh7110_gpio_irq_handler = jh7110_sys_irq_handler,
+ .jh7110_gpio_init_hw = jh7110_sys_init_hw,
+};
+
+static const struct of_device_id jh7110_sys_pinctrl_of_match[] = {
+ {
+ .compatible = "starfive,jh7110-sys-pinctrl",
+ .data = &jh7110_sys_pinctrl_info,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jh7110_sys_pinctrl_of_match);
+
+static struct platform_driver jh7110_sys_pinctrl_driver = {
+ .probe = jh7110_pinctrl_probe,
+ .driver = {
+ .name = "starfive-jh7110-sys-pinctrl",
+ .of_match_table = jh7110_sys_pinctrl_of_match,
+ },
+};
+module_platform_driver(jh7110_sys_pinctrl_driver);
+
+MODULE_DESCRIPTION("Pinctrl driver for the StarFive JH7110 SoC sys controller");
+MODULE_AUTHOR("Emil Renner Berthing <kernel@esmil.dk>");
+MODULE_AUTHOR("Jianlong Huang <jianlong.huang@starfivetech.com>");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Pinctrl / GPIO driver for StarFive JH7110 SoC
+ *
+ * Copyright (C) 2022 Emil Renner Berthing <kernel@esmil.dk>
+ * Copyright (C) 2022 StarFive Technology Co., Ltd.
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/gpio/driver.h>
+#include <linux/io.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+#include <linux/seq_file.h>
+#include <linux/spinlock.h>
+
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
+#include <dt-bindings/pinctrl/starfive,jh7110-pinctrl.h>
+
+#include "../core.h"
+#include "../pinctrl-utils.h"
+#include "../pinmux.h"
+#include "../pinconf.h"
+#include "pinctrl-starfive-jh7110.h"
+
+/* pad control bits */
+#define JH7110_PADCFG_POS BIT(7)
+#define JH7110_PADCFG_SMT BIT(6)
+#define JH7110_PADCFG_SLEW BIT(5)
+#define JH7110_PADCFG_PD BIT(4)
+#define JH7110_PADCFG_PU BIT(3)
+#define JH7110_PADCFG_BIAS (JH7110_PADCFG_PD | JH7110_PADCFG_PU)
+#define JH7110_PADCFG_DS_MASK GENMASK(2, 1)
+#define JH7110_PADCFG_DS_2MA (0U << 1)
+#define JH7110_PADCFG_DS_4MA BIT(1)
+#define JH7110_PADCFG_DS_8MA (2U << 1)
+#define JH7110_PADCFG_DS_12MA (3U << 1)
+#define JH7110_PADCFG_IE BIT(0)
+
+/*
+ * The packed pinmux values from the device tree look like this:
+ *
+ * | 31 - 24 | 23 - 16 | 15 - 10 | 9 - 8 | 7 - 0 |
+ * | din | dout | doen | function | pin |
+ */
+static unsigned int jh7110_pinmux_din(u32 v)
+{
+ return (v & GENMASK(31, 24)) >> 24;
+}
+
+static u32 jh7110_pinmux_dout(u32 v)
+{
+ return (v & GENMASK(23, 16)) >> 16;
+}
+
+static u32 jh7110_pinmux_doen(u32 v)
+{
+ return (v & GENMASK(15, 10)) >> 10;
+}
+
+static u32 jh7110_pinmux_function(u32 v)
+{
+ return (v & GENMASK(9, 8)) >> 8;
+}
+
+static unsigned int jh7110_pinmux_pin(u32 v)
+{
+ return v & GENMASK(7, 0);
+}
+
+static struct jh7110_pinctrl *jh7110_from_irq_data(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+
+ return container_of(gc, struct jh7110_pinctrl, gc);
+}
+
+struct jh7110_pinctrl *jh7110_from_irq_desc(struct irq_desc *desc)
+{
+ struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+
+ return container_of(gc, struct jh7110_pinctrl, gc);
+}
+EXPORT_SYMBOL_GPL(jh7110_from_irq_desc);
+
+#ifdef CONFIG_DEBUG_FS
+static void jh7110_pin_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s, unsigned int pin)
+{
+ struct jh7110_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ const struct jh7110_pinctrl_soc_info *info = sfp->info;
+
+ seq_printf(s, "%s", dev_name(pctldev->dev));
+
+ if (pin < sfp->gc.ngpio) {
+ unsigned int offset = 4 * (pin / 4);
+ unsigned int shift = 8 * (pin % 4);
+ u32 dout = readl_relaxed(sfp->base + info->dout_reg_base + offset);
+ u32 doen = readl_relaxed(sfp->base + info->doen_reg_base + offset);
+ u32 gpi = readl_relaxed(sfp->base + info->gpi_reg_base + offset);
+
+ dout = (dout >> shift) & info->dout_mask;
+ doen = (doen >> shift) & info->doen_mask;
+ gpi = ((gpi >> shift) - 2) & info->gpi_mask;
+
+ seq_printf(s, " dout=%u doen=%u din=%u", dout, doen, gpi);
+ }
+}
+#else
+#define jh7110_pin_dbg_show NULL
+#endif
+
+static int jh7110_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np,
+ struct pinctrl_map **maps,
+ unsigned int *num_maps)
+{
+ struct jh7110_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ struct device *dev = sfp->gc.parent;
+ struct device_node *child;
+ struct pinctrl_map *map;
+ const char **pgnames;
+ const char *grpname;
+ int ngroups;
+ int nmaps;
+ int ret;
+
+ ngroups = 0;
+ for_each_child_of_node(np, child)
+ ngroups += 1;
+ nmaps = 2 * ngroups;
+
+ pgnames = devm_kcalloc(dev, ngroups, sizeof(*pgnames), GFP_KERNEL);
+ if (!pgnames)
+ return -ENOMEM;
+
+ map = kcalloc(nmaps, sizeof(*map), GFP_KERNEL);
+ if (!map)
+ return -ENOMEM;
+
+ nmaps = 0;
+ ngroups = 0;
+ mutex_lock(&sfp->mutex);
+ for_each_child_of_node(np, child) {
+ int npins = of_property_count_u32_elems(child, "pinmux");
+ int *pins;
+ u32 *pinmux;
+ int i;
+
+ if (npins < 1) {
+ dev_err(dev,
+ "invalid pinctrl group %pOFn.%pOFn: pinmux not set\n",
+ np, child);
+ ret = -EINVAL;
+ goto put_child;
+ }
+
+ grpname = devm_kasprintf(dev, GFP_KERNEL, "%pOFn.%pOFn", np, child);
+ if (!grpname) {
+ ret = -ENOMEM;
+ goto put_child;
+ }
+
+ pgnames[ngroups++] = grpname;
+
+ pins = devm_kcalloc(dev, npins, sizeof(*pins), GFP_KERNEL);
+ if (!pins) {
+ ret = -ENOMEM;
+ goto put_child;
+ }
+
+ pinmux = devm_kcalloc(dev, npins, sizeof(*pinmux), GFP_KERNEL);
+ if (!pinmux) {
+ ret = -ENOMEM;
+ goto put_child;
+ }
+
+ ret = of_property_read_u32_array(child, "pinmux", pinmux, npins);
+ if (ret)
+ goto put_child;
+
+ for (i = 0; i < npins; i++)
+ pins[i] = jh7110_pinmux_pin(pinmux[i]);
+
+ map[nmaps].type = PIN_MAP_TYPE_MUX_GROUP;
+ map[nmaps].data.mux.function = np->name;
+ map[nmaps].data.mux.group = grpname;
+ nmaps += 1;
+
+ ret = pinctrl_generic_add_group(pctldev, grpname,
+ pins, npins, pinmux);
+ if (ret < 0) {
+ dev_err(dev, "error adding group %s: %d\n", grpname, ret);
+ goto put_child;
+ }
+
+ ret = pinconf_generic_parse_dt_config(child, pctldev,
+ &map[nmaps].data.configs.configs,
+ &map[nmaps].data.configs.num_configs);
+ if (ret) {
+ dev_err(dev, "error parsing pin config of group %s: %d\n",
+ grpname, ret);
+ goto put_child;
+ }
+
+ /* don't create a map if there are no pinconf settings */
+ if (map[nmaps].data.configs.num_configs == 0)
+ continue;
+
+ map[nmaps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
+ map[nmaps].data.configs.group_or_pin = grpname;
+ nmaps += 1;
+ }
+
+ ret = pinmux_generic_add_function(pctldev, np->name,
+ pgnames, ngroups, NULL);
+ if (ret < 0) {
+ dev_err(dev, "error adding function %s: %d\n", np->name, ret);
+ goto free_map;
+ }
+ mutex_unlock(&sfp->mutex);
+
+ *maps = map;
+ *num_maps = nmaps;
+ return 0;
+
+put_child:
+ of_node_put(child);
+free_map:
+ pinctrl_utils_free_map(pctldev, map, nmaps);
+ mutex_unlock(&sfp->mutex);
+ return ret;
+}
+
+static const struct pinctrl_ops jh7110_pinctrl_ops = {
+ .get_groups_count = pinctrl_generic_get_group_count,
+ .get_group_name = pinctrl_generic_get_group_name,
+ .get_group_pins = pinctrl_generic_get_group_pins,
+ .pin_dbg_show = jh7110_pin_dbg_show,
+ .dt_node_to_map = jh7110_dt_node_to_map,
+ .dt_free_map = pinctrl_utils_free_map,
+};
+
+void jh7110_set_gpiomux(struct jh7110_pinctrl *sfp, unsigned int pin,
+ unsigned int din, u32 dout, u32 doen)
+{
+ const struct jh7110_pinctrl_soc_info *info = sfp->info;
+
+ unsigned int offset = 4 * (pin / 4);
+ unsigned int shift = 8 * (pin % 4);
+ u32 dout_mask = info->dout_mask << shift;
+ u32 done_mask = info->doen_mask << shift;
+ u32 ival, imask;
+ void __iomem *reg_dout;
+ void __iomem *reg_doen;
+ void __iomem *reg_din;
+ unsigned long flags;
+
+ reg_dout = sfp->base + info->dout_reg_base + offset;
+ reg_doen = sfp->base + info->doen_reg_base + offset;
+ dout <<= shift;
+ doen <<= shift;
+ if (din != GPI_NONE) {
+ unsigned int ioffset = 4 * (din / 4);
+ unsigned int ishift = 8 * (din % 4);
+
+ reg_din = sfp->base + info->gpi_reg_base + ioffset;
+ ival = (pin + 2) << ishift;
+ imask = info->gpi_mask << ishift;
+ } else {
+ reg_din = NULL;
+ }
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ dout |= readl_relaxed(reg_dout) & ~dout_mask;
+ writel_relaxed(dout, reg_dout);
+ doen |= readl_relaxed(reg_doen) & ~done_mask;
+ writel_relaxed(doen, reg_doen);
+ if (reg_din) {
+ ival |= readl_relaxed(reg_din) & ~imask;
+ writel_relaxed(ival, reg_din);
+ }
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+EXPORT_SYMBOL_GPL(jh7110_set_gpiomux);
+
+static int jh7110_set_mux(struct pinctrl_dev *pctldev,
+ unsigned int fsel, unsigned int gsel)
+{
+ struct jh7110_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ const struct jh7110_pinctrl_soc_info *info = sfp->info;
+ const struct group_desc *group;
+ const u32 *pinmux;
+ unsigned int i;
+
+ group = pinctrl_generic_get_group(pctldev, gsel);
+ if (!group)
+ return -EINVAL;
+
+ pinmux = group->data;
+ for (i = 0; i < group->num_pins; i++) {
+ u32 v = pinmux[i];
+
+ if (info->jh7110_set_one_pin_mux)
+ info->jh7110_set_one_pin_mux(sfp,
+ jh7110_pinmux_pin(v),
+ jh7110_pinmux_din(v),
+ jh7110_pinmux_dout(v),
+ jh7110_pinmux_doen(v),
+ jh7110_pinmux_function(v));
+ }
+
+ return 0;
+}
+
+static const struct pinmux_ops jh7110_pinmux_ops = {
+ .get_functions_count = pinmux_generic_get_function_count,
+ .get_function_name = pinmux_generic_get_function_name,
+ .get_function_groups = pinmux_generic_get_function_groups,
+ .set_mux = jh7110_set_mux,
+ .strict = true,
+};
+
+static const u8 jh7110_drive_strength_mA[4] = { 2, 4, 8, 12 };
+
+static u32 jh7110_padcfg_ds_to_mA(u32 padcfg)
+{
+ return jh7110_drive_strength_mA[(padcfg >> 1) & 3U];
+}
+
+static u32 jh7110_padcfg_ds_from_mA(u32 v)
+{
+ int i;
+
+ for (i = 0; i < 3; i++) {
+ if (v <= jh7110_drive_strength_mA[i])
+ break;
+ }
+ return i << 1;
+}
+
+static void jh7110_padcfg_rmw(struct jh7110_pinctrl *sfp,
+ unsigned int pin, u32 mask, u32 value)
+{
+ const struct jh7110_pinctrl_soc_info *info = sfp->info;
+ void __iomem *reg;
+ unsigned long flags;
+ int padcfg_base;
+
+ if (!info->jh7110_get_padcfg_base)
+ return;
+
+ padcfg_base = info->jh7110_get_padcfg_base(sfp, pin);
+ if (padcfg_base < 0)
+ return;
+
+ reg = sfp->base + padcfg_base + 4 * pin;
+ value &= mask;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value |= readl_relaxed(reg) & ~mask;
+ writel_relaxed(value, reg);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static int jh7110_pinconf_get(struct pinctrl_dev *pctldev,
+ unsigned int pin, unsigned long *config)
+{
+ struct jh7110_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ const struct jh7110_pinctrl_soc_info *info = sfp->info;
+ int param = pinconf_to_config_param(*config);
+ u32 padcfg, arg;
+ bool enabled;
+ int padcfg_base;
+
+ if (!info->jh7110_get_padcfg_base)
+ return 0;
+
+ padcfg_base = info->jh7110_get_padcfg_base(sfp, pin);
+ if (padcfg_base < 0)
+ return 0;
+
+ padcfg = readl_relaxed(sfp->base + padcfg_base + 4 * pin);
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ enabled = !(padcfg & JH7110_PADCFG_BIAS);
+ arg = 0;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ enabled = padcfg & JH7110_PADCFG_PD;
+ arg = 1;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ enabled = padcfg & JH7110_PADCFG_PU;
+ arg = 1;
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ enabled = true;
+ arg = jh7110_padcfg_ds_to_mA(padcfg);
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ enabled = padcfg & JH7110_PADCFG_IE;
+ arg = enabled;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ enabled = padcfg & JH7110_PADCFG_SMT;
+ arg = enabled;
+ break;
+ case PIN_CONFIG_SLEW_RATE:
+ enabled = true;
+ arg = !!(padcfg & JH7110_PADCFG_SLEW);
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+
+ *config = pinconf_to_config_packed(param, arg);
+ return enabled ? 0 : -EINVAL;
+}
+
+static int jh7110_pinconf_group_get(struct pinctrl_dev *pctldev,
+ unsigned int gsel,
+ unsigned long *config)
+{
+ const struct group_desc *group;
+
+ group = pinctrl_generic_get_group(pctldev, gsel);
+ if (!group)
+ return -EINVAL;
+
+ return jh7110_pinconf_get(pctldev, group->pins[0], config);
+}
+
+static int jh7110_pinconf_group_set(struct pinctrl_dev *pctldev,
+ unsigned int gsel,
+ unsigned long *configs,
+ unsigned int num_configs)
+{
+ struct jh7110_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ const struct group_desc *group;
+ u16 mask, value;
+ int i;
+
+ group = pinctrl_generic_get_group(pctldev, gsel);
+ if (!group)
+ return -EINVAL;
+
+ mask = 0;
+ value = 0;
+ for (i = 0; i < num_configs; i++) {
+ int param = pinconf_to_config_param(configs[i]);
+ u32 arg = pinconf_to_config_argument(configs[i]);
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ mask |= JH7110_PADCFG_BIAS;
+ value &= ~JH7110_PADCFG_BIAS;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (arg == 0)
+ return -ENOTSUPP;
+ mask |= JH7110_PADCFG_BIAS;
+ value = (value & ~JH7110_PADCFG_BIAS) | JH7110_PADCFG_PD;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (arg == 0)
+ return -ENOTSUPP;
+ mask |= JH7110_PADCFG_BIAS;
+ value = (value & ~JH7110_PADCFG_BIAS) | JH7110_PADCFG_PU;
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ mask |= JH7110_PADCFG_DS_MASK;
+ value = (value & ~JH7110_PADCFG_DS_MASK) |
+ jh7110_padcfg_ds_from_mA(arg);
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ mask |= JH7110_PADCFG_IE;
+ if (arg)
+ value |= JH7110_PADCFG_IE;
+ else
+ value &= ~JH7110_PADCFG_IE;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ mask |= JH7110_PADCFG_SMT;
+ if (arg)
+ value |= JH7110_PADCFG_SMT;
+ else
+ value &= ~JH7110_PADCFG_SMT;
+ break;
+ case PIN_CONFIG_SLEW_RATE:
+ mask |= JH7110_PADCFG_SLEW;
+ if (arg)
+ value |= JH7110_PADCFG_SLEW;
+ else
+ value &= ~JH7110_PADCFG_SLEW;
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+ }
+
+ for (i = 0; i < group->num_pins; i++)
+ jh7110_padcfg_rmw(sfp, group->pins[i], mask, value);
+
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void jh7110_pinconf_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s, unsigned int pin)
+{
+ struct jh7110_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ const struct jh7110_pinctrl_soc_info *info = sfp->info;
+ u32 value;
+ int padcfg_base;
+
+ if (!info->jh7110_get_padcfg_base)
+ return;
+
+ padcfg_base = info->jh7110_get_padcfg_base(sfp, pin);
+ if (padcfg_base < 0)
+ return;
+
+ value = readl_relaxed(sfp->base + padcfg_base + 4 * pin);
+ seq_printf(s, " (0x%02x)", value);
+}
+#else
+#define jh7110_pinconf_dbg_show NULL
+#endif
+
+static const struct pinconf_ops jh7110_pinconf_ops = {
+ .pin_config_get = jh7110_pinconf_get,
+ .pin_config_group_get = jh7110_pinconf_group_get,
+ .pin_config_group_set = jh7110_pinconf_group_set,
+ .pin_config_dbg_show = jh7110_pinconf_dbg_show,
+ .is_generic = true,
+};
+
+static int jh7110_gpio_request(struct gpio_chip *gc, unsigned int gpio)
+{
+ return pinctrl_gpio_request(gc->base + gpio);
+}
+
+static void jh7110_gpio_free(struct gpio_chip *gc, unsigned int gpio)
+{
+ pinctrl_gpio_free(gc->base + gpio);
+}
+
+static int jh7110_gpio_get_direction(struct gpio_chip *gc,
+ unsigned int gpio)
+{
+ struct jh7110_pinctrl *sfp = container_of(gc,
+ struct jh7110_pinctrl, gc);
+ const struct jh7110_pinctrl_soc_info *info = sfp->info;
+ unsigned int offset = 4 * (gpio / 4);
+ unsigned int shift = 8 * (gpio % 4);
+ u32 doen = readl_relaxed(sfp->base + info->doen_reg_base + offset);
+
+ doen = (doen >> shift) & info->doen_mask;
+
+ return doen == GPOEN_ENABLE ?
+ GPIO_LINE_DIRECTION_OUT : GPIO_LINE_DIRECTION_IN;
+}
+
+static int jh7110_gpio_direction_input(struct gpio_chip *gc,
+ unsigned int gpio)
+{
+ struct jh7110_pinctrl *sfp = container_of(gc,
+ struct jh7110_pinctrl, gc);
+ const struct jh7110_pinctrl_soc_info *info = sfp->info;
+
+ /* enable input and schmitt trigger */
+ jh7110_padcfg_rmw(sfp, gpio,
+ JH7110_PADCFG_IE | JH7110_PADCFG_SMT,
+ JH7110_PADCFG_IE | JH7110_PADCFG_SMT);
+
+ if (info->jh7110_set_one_pin_mux)
+ info->jh7110_set_one_pin_mux(sfp, gpio,
+ GPI_NONE, GPOUT_LOW, GPOEN_DISABLE, 0);
+
+ return 0;
+}
+
+static int jh7110_gpio_direction_output(struct gpio_chip *gc,
+ unsigned int gpio, int value)
+{
+ struct jh7110_pinctrl *sfp = container_of(gc,
+ struct jh7110_pinctrl, gc);
+ const struct jh7110_pinctrl_soc_info *info = sfp->info;
+
+ if (info->jh7110_set_one_pin_mux)
+ info->jh7110_set_one_pin_mux(sfp, gpio,
+ GPI_NONE, value ? GPOUT_HIGH : GPOUT_LOW,
+ GPOEN_ENABLE, 0);
+
+ /* disable input, schmitt trigger and bias */
+ jh7110_padcfg_rmw(sfp, gpio,
+ JH7110_PADCFG_IE | JH7110_PADCFG_SMT |
+ JH7110_PADCFG_BIAS, 0);
+ return 0;
+}
+
+static int jh7110_gpio_get(struct gpio_chip *gc, unsigned int gpio)
+{
+ struct jh7110_pinctrl *sfp = container_of(gc,
+ struct jh7110_pinctrl, gc);
+ const struct jh7110_pinctrl_soc_info *info = sfp->info;
+ void __iomem *reg = sfp->base + info->gpioin_reg_base
+ + 4 * (gpio / 32);
+
+ return !!(readl_relaxed(reg) & BIT(gpio % 32));
+}
+
+static void jh7110_gpio_set(struct gpio_chip *gc,
+ unsigned int gpio, int value)
+{
+ struct jh7110_pinctrl *sfp = container_of(gc,
+ struct jh7110_pinctrl, gc);
+ const struct jh7110_pinctrl_soc_info *info = sfp->info;
+ unsigned int offset = 4 * (gpio / 4);
+ unsigned int shift = 8 * (gpio % 4);
+ void __iomem *reg_dout = sfp->base + info->dout_reg_base + offset;
+ u32 dout = (value ? GPOUT_HIGH : GPOUT_LOW) << shift;
+ u32 mask = info->dout_mask << shift;
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ dout |= readl_relaxed(reg_dout) & ~mask;
+ writel_relaxed(dout, reg_dout);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static int jh7110_gpio_set_config(struct gpio_chip *gc,
+ unsigned int gpio, unsigned long config)
+{
+ struct jh7110_pinctrl *sfp = container_of(gc,
+ struct jh7110_pinctrl, gc);
+ u32 arg = pinconf_to_config_argument(config);
+ u32 value;
+ u32 mask;
+
+ switch (pinconf_to_config_param(config)) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ mask = JH7110_PADCFG_BIAS;
+ value = 0;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (arg == 0)
+ return -ENOTSUPP;
+ mask = JH7110_PADCFG_BIAS;
+ value = JH7110_PADCFG_PD;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (arg == 0)
+ return -ENOTSUPP;
+ mask = JH7110_PADCFG_BIAS;
+ value = JH7110_PADCFG_PU;
+ break;
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ return 0;
+ case PIN_CONFIG_INPUT_ENABLE:
+ mask = JH7110_PADCFG_IE;
+ value = arg ? JH7110_PADCFG_IE : 0;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ mask = JH7110_PADCFG_SMT;
+ value = arg ? JH7110_PADCFG_SMT : 0;
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+
+ jh7110_padcfg_rmw(sfp, gpio, mask, value);
+ return 0;
+}
+
+static int jh7110_gpio_add_pin_ranges(struct gpio_chip *gc)
+{
+ struct jh7110_pinctrl *sfp = container_of(gc,
+ struct jh7110_pinctrl, gc);
+
+ sfp->gpios.name = sfp->gc.label;
+ sfp->gpios.base = sfp->gc.base;
+ sfp->gpios.pin_base = 0;
+ sfp->gpios.npins = sfp->gc.ngpio;
+ sfp->gpios.gc = &sfp->gc;
+ pinctrl_add_gpio_range(sfp->pctl, &sfp->gpios);
+ return 0;
+}
+
+static void jh7110_irq_ack(struct irq_data *d)
+{
+ struct jh7110_pinctrl *sfp = jh7110_from_irq_data(d);
+ const struct jh7110_gpio_irq_reg *irq_reg = sfp->info->irq_reg;
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *ic = sfp->base + irq_reg->ic_reg_base
+ + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ unsigned long flags;
+ u32 value;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value = readl_relaxed(ic) & ~mask;
+ writel_relaxed(value, ic);
+ writel_relaxed(value | mask, ic);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static void jh7110_irq_mask(struct irq_data *d)
+{
+ struct jh7110_pinctrl *sfp = jh7110_from_irq_data(d);
+ const struct jh7110_gpio_irq_reg *irq_reg = sfp->info->irq_reg;
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *ie = sfp->base + irq_reg->ie_reg_base
+ + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ unsigned long flags;
+ u32 value;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value = readl_relaxed(ie) & ~mask;
+ writel_relaxed(value, ie);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+
+ gpiochip_disable_irq(&sfp->gc, d->hwirq);
+}
+
+static void jh7110_irq_mask_ack(struct irq_data *d)
+{
+ struct jh7110_pinctrl *sfp = jh7110_from_irq_data(d);
+ const struct jh7110_gpio_irq_reg *irq_reg = sfp->info->irq_reg;
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *ie = sfp->base + irq_reg->ie_reg_base
+ + 4 * (gpio / 32);
+ void __iomem *ic = sfp->base + irq_reg->ic_reg_base
+ + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ unsigned long flags;
+ u32 value;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value = readl_relaxed(ie) & ~mask;
+ writel_relaxed(value, ie);
+
+ value = readl_relaxed(ic) & ~mask;
+ writel_relaxed(value, ic);
+ writel_relaxed(value | mask, ic);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static void jh7110_irq_unmask(struct irq_data *d)
+{
+ struct jh7110_pinctrl *sfp = jh7110_from_irq_data(d);
+ const struct jh7110_gpio_irq_reg *irq_reg = sfp->info->irq_reg;
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *ie = sfp->base + irq_reg->ie_reg_base
+ + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ unsigned long flags;
+ u32 value;
+
+ gpiochip_enable_irq(&sfp->gc, d->hwirq);
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value = readl_relaxed(ie) | mask;
+ writel_relaxed(value, ie);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static int jh7110_irq_set_type(struct irq_data *d, unsigned int trigger)
+{
+ struct jh7110_pinctrl *sfp = jh7110_from_irq_data(d);
+ const struct jh7110_gpio_irq_reg *irq_reg = sfp->info->irq_reg;
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *base = sfp->base + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ u32 irq_type, edge_both, polarity;
+ unsigned long flags;
+
+ switch (trigger) {
+ case IRQ_TYPE_EDGE_RISING:
+ irq_type = mask; /* 1: edge triggered */
+ edge_both = 0; /* 0: single edge */
+ polarity = mask; /* 1: rising edge */
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ irq_type = mask; /* 1: edge triggered */
+ edge_both = 0; /* 0: single edge */
+ polarity = 0; /* 0: falling edge */
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ irq_type = mask; /* 1: edge triggered */
+ edge_both = mask; /* 1: both edges */
+ polarity = 0; /* 0: ignored */
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ irq_type = 0; /* 0: level triggered */
+ edge_both = 0; /* 0: ignored */
+ polarity = mask; /* 1: high level */
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ irq_type = 0; /* 0: level triggered */
+ edge_both = 0; /* 0: ignored */
+ polarity = 0; /* 0: low level */
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (trigger & IRQ_TYPE_EDGE_BOTH)
+ irq_set_handler_locked(d, handle_edge_irq);
+ else
+ irq_set_handler_locked(d, handle_level_irq);
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ irq_type |= readl_relaxed(base + irq_reg->is_reg_base) & ~mask;
+ writel_relaxed(irq_type, base + irq_reg->is_reg_base);
+
+ edge_both |= readl_relaxed(base + irq_reg->ibe_reg_base) & ~mask;
+ writel_relaxed(edge_both, base + irq_reg->ibe_reg_base);
+
+ polarity |= readl_relaxed(base + irq_reg->iev_reg_base) & ~mask;
+ writel_relaxed(polarity, base + irq_reg->iev_reg_base);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+ return 0;
+}
+
+static struct irq_chip jh7110_irq_chip = {
+ .irq_ack = jh7110_irq_ack,
+ .irq_mask = jh7110_irq_mask,
+ .irq_mask_ack = jh7110_irq_mask_ack,
+ .irq_unmask = jh7110_irq_unmask,
+ .irq_set_type = jh7110_irq_set_type,
+ .flags = IRQCHIP_IMMUTABLE | IRQCHIP_SET_TYPE_MASKED,
+ GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
+static void jh7110_disable_clock(void *data)
+{
+ clk_disable_unprepare(data);
+}
+
+int jh7110_pinctrl_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ const struct jh7110_pinctrl_soc_info *info;
+ struct jh7110_pinctrl *sfp;
+ struct pinctrl_desc *jh7110_pinctrl_desc;
+ struct reset_control *rst;
+ struct clk *clk;
+ int ret;
+
+ info = of_device_get_match_data(&pdev->dev);
+ if (!info)
+ return -ENODEV;
+
+ if (!info->pins || !info->npins) {
+ dev_err(dev, "wrong pinctrl info\n");
+ return -EINVAL;
+ }
+
+ sfp = devm_kzalloc(dev, sizeof(*sfp), GFP_KERNEL);
+ if (!sfp)
+ return -ENOMEM;
+
+ sfp->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(sfp->base))
+ return PTR_ERR(sfp->base);
+
+ clk = devm_clk_get_optional(dev, NULL);
+ if (IS_ERR(clk))
+ return dev_err_probe(dev, PTR_ERR(clk), "could not get clock\n");
+
+ rst = devm_reset_control_get_exclusive(dev, NULL);
+ if (IS_ERR(rst))
+ return dev_err_probe(dev, PTR_ERR(rst), "could not get reset\n");
+
+ /*
+ * we don't want to assert reset and risk undoing pin muxing for the
+ * early boot serial console, but let's make sure the reset line is
+ * deasserted in case someone runs a really minimal bootloader.
+ */
+ ret = reset_control_deassert(rst);
+ if (ret)
+ return dev_err_probe(dev, ret, "could not deassert reset\n");
+
+ if (clk) {
+ ret = clk_prepare_enable(clk);
+ if (ret)
+ return dev_err_probe(dev, ret, "could not enable clock\n");
+
+ ret = devm_add_action_or_reset(dev, jh7110_disable_clock, clk);
+ if (ret)
+ return ret;
+ }
+
+ jh7110_pinctrl_desc = devm_kzalloc(&pdev->dev,
+ sizeof(*jh7110_pinctrl_desc),
+ GFP_KERNEL);
+ if (!jh7110_pinctrl_desc)
+ return -ENOMEM;
+
+ jh7110_pinctrl_desc->name = dev_name(dev);
+ jh7110_pinctrl_desc->pins = info->pins;
+ jh7110_pinctrl_desc->npins = info->npins;
+ jh7110_pinctrl_desc->pctlops = &jh7110_pinctrl_ops;
+ jh7110_pinctrl_desc->pmxops = &jh7110_pinmux_ops;
+ jh7110_pinctrl_desc->confops = &jh7110_pinconf_ops;
+ jh7110_pinctrl_desc->owner = THIS_MODULE;
+
+ sfp->info = info;
+ sfp->dev = dev;
+ platform_set_drvdata(pdev, sfp);
+ sfp->gc.parent = dev;
+ raw_spin_lock_init(&sfp->lock);
+ mutex_init(&sfp->mutex);
+
+ ret = devm_pinctrl_register_and_init(dev,
+ jh7110_pinctrl_desc,
+ sfp, &sfp->pctl);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "could not register pinctrl driver\n");
+
+ sfp->gc.label = dev_name(dev);
+ sfp->gc.owner = THIS_MODULE;
+ sfp->gc.request = jh7110_gpio_request;
+ sfp->gc.free = jh7110_gpio_free;
+ sfp->gc.get_direction = jh7110_gpio_get_direction;
+ sfp->gc.direction_input = jh7110_gpio_direction_input;
+ sfp->gc.direction_output = jh7110_gpio_direction_output;
+ sfp->gc.get = jh7110_gpio_get;
+ sfp->gc.set = jh7110_gpio_set;
+ sfp->gc.set_config = jh7110_gpio_set_config;
+ sfp->gc.add_pin_ranges = jh7110_gpio_add_pin_ranges;
+ sfp->gc.base = info->gc_base;
+ sfp->gc.ngpio = info->ngpios;
+
+ jh7110_irq_chip.name = sfp->gc.label;
+ gpio_irq_chip_set_chip(&sfp->gc.irq, &jh7110_irq_chip);
+ sfp->gc.irq.parent_handler = info->jh7110_gpio_irq_handler;
+ sfp->gc.irq.num_parents = 1;
+ sfp->gc.irq.parents = devm_kcalloc(dev, sfp->gc.irq.num_parents,
+ sizeof(*sfp->gc.irq.parents),
+ GFP_KERNEL);
+ if (!sfp->gc.irq.parents)
+ return -ENOMEM;
+ sfp->gc.irq.default_type = IRQ_TYPE_NONE;
+ sfp->gc.irq.handler = handle_bad_irq;
+ sfp->gc.irq.init_hw = info->jh7110_gpio_init_hw;
+
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0)
+ return ret;
+ sfp->gc.irq.parents[0] = ret;
+
+ ret = devm_gpiochip_add_data(dev, &sfp->gc, sfp);
+ if (ret)
+ return dev_err_probe(dev, ret, "could not register gpiochip\n");
+
+ irq_domain_set_pm_device(sfp->gc.irq.domain, dev);
+
+ dev_info(dev, "StarFive GPIO chip registered %d GPIOs\n", sfp->gc.ngpio);
+
+ return pinctrl_enable(sfp->pctl);
+}
+EXPORT_SYMBOL_GPL(jh7110_pinctrl_probe);
+
+MODULE_DESCRIPTION("Pinctrl driver for the StarFive JH7110 SoC");
+MODULE_AUTHOR("Emil Renner Berthing <kernel@esmil.dk>");
+MODULE_AUTHOR("Jianlong Huang <jianlong.huang@starfivetech.com>");
+MODULE_LICENSE("GPL");
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Pinctrl / GPIO driver for StarFive JH7110 SoC
+ *
+ * Copyright (C) 2022 StarFive Technology Co., Ltd.
+ */
+
+#ifndef __PINCTRL_STARFIVE_JH7110_H__
+#define __PINCTRL_STARFIVE_JH7110_H__
+
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinmux.h>
+
+struct jh7110_pinctrl {
+ struct device *dev;
+ struct gpio_chip gc;
+ struct pinctrl_gpio_range gpios;
+ raw_spinlock_t lock;
+ void __iomem *base;
+ struct pinctrl_dev *pctl;
+ /* register read/write mutex */
+ struct mutex mutex;
+ const struct jh7110_pinctrl_soc_info *info;
+};
+
+struct jh7110_gpio_irq_reg {
+ unsigned int is_reg_base;
+ unsigned int ic_reg_base;
+ unsigned int ibe_reg_base;
+ unsigned int iev_reg_base;
+ unsigned int ie_reg_base;
+ unsigned int ris_reg_base;
+ unsigned int mis_reg_base;
+};
+
+struct jh7110_pinctrl_soc_info {
+ const struct pinctrl_pin_desc *pins;
+ unsigned int npins;
+ unsigned int ngpios;
+ unsigned int gc_base;
+
+ /* gpio dout/doen/din/gpioinput register */
+ unsigned int dout_reg_base;
+ unsigned int dout_mask;
+ unsigned int doen_reg_base;
+ unsigned int doen_mask;
+ unsigned int gpi_reg_base;
+ unsigned int gpi_mask;
+ unsigned int gpioin_reg_base;
+
+ const struct jh7110_gpio_irq_reg *irq_reg;
+
+ /* generic pinmux */
+ int (*jh7110_set_one_pin_mux)(struct jh7110_pinctrl *sfp,
+ unsigned int pin,
+ unsigned int din, u32 dout,
+ u32 doen, u32 func);
+ /* gpio chip */
+ int (*jh7110_get_padcfg_base)(struct jh7110_pinctrl *sfp,
+ unsigned int pin);
+ void (*jh7110_gpio_irq_handler)(struct irq_desc *desc);
+ int (*jh7110_gpio_init_hw)(struct gpio_chip *gc);
+};
+
+void jh7110_set_gpiomux(struct jh7110_pinctrl *sfp, unsigned int pin,
+ unsigned int din, u32 dout, u32 doen);
+int jh7110_pinctrl_probe(struct platform_device *pdev);
+struct jh7110_pinctrl *jh7110_from_irq_desc(struct irq_desc *desc);
+
+#endif /* __PINCTRL_STARFIVE_JH7110_H__ */
projects / platform / kernel / linux-starfive.git / commitdiff