| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Emil Renner Berthing | 7422 | 98.68% | 1 | 11.11% |
| Jianlong Huang | 42 | 0.56% | 3 | 33.33% |
| Geert Uytterhoeven | 30 | 0.40% | 2 | 22.22% |
| Marc Zyngier | 18 | 0.24% | 2 | 22.22% |
| Andy Shevchenko | 9 | 0.12% | 1 | 11.11% |
| Total | 7521 | 9 |
// SPDX-License-Identifier: GPL-2.0 /* * Pinctrl / GPIO driver for StarFive JH7100 SoC * * Copyright (C) 2020 Shanghai StarFive Technology Co., Ltd. * Copyright (C) 2021 Emil Renner Berthing <kernel@esmil.dk> */ #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/of.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/pinctrl-starfive-jh7100.h> #include "../core.h" #include "../pinctrl-utils.h" #include "../pinmux.h" #include "../pinconf.h" #define DRIVER_NAME "pinctrl-starfive" /* * Refer to Section 12. GPIO Registers in the JH7100 data sheet: * https://github.com/starfive-tech/JH7100_Docs */ #define NR_GPIOS 64 /* * Global enable for GPIO interrupts. If bit 0 is set to 1 the GPIO interrupts * are enabled. If set to 0 the GPIO interrupts are disabled. */ #define GPIOEN 0x000 /* * The following 32-bit registers come in pairs, but only the offset of the * first register is defined. The first controls (interrupts for) GPIO 0-31 and * the second GPIO 32-63. */ /* * Interrupt Type. If set to 1 the interrupt is edge-triggered. If set to 0 the * interrupt is level-triggered. */ #define GPIOIS 0x010 /* * Edge-Trigger Interrupt Type. If set to 1 the interrupt gets triggered on * both positive and negative edges. If set to 0 the interrupt is triggered by a * single edge. */ #define GPIOIBE 0x018 /* * Interrupt Trigger Polarity. If set to 1 the interrupt is triggered on a * rising edge (edge-triggered) or high level (level-triggered). If set to 0 the * interrupt is triggered on a falling edge (edge-triggered) or low level * (level-triggered). */ #define GPIOIEV 0x020 /* * Interrupt Mask. If set to 1 the interrupt is enabled (unmasked). If set to 0 * the interrupt is disabled (masked). Note that the current documentation is * wrong and says the exct opposite of this. */ #define GPIOIE 0x028 /* * Clear Edge-Triggered Interrupts. Write a 1 to clear the edge-triggered * interrupt. */ #define GPIOIC 0x030 /* * Edge-Triggered Interrupt Status. A 1 means the configured edge was detected. */ #define GPIORIS 0x038 /* * Interrupt Status after Masking. A 1 means the configured edge or level was * detected and not masked. */ #define GPIOMIS 0x040 /* * Data Value. Dynamically reflects the value of the GPIO pin. If 1 the pin is * a digital 1 and if 0 the pin is a digital 0. */ #define GPIODIN 0x048 /* * From the data sheet section 12.2, there are 64 32-bit output data registers * and 64 output enable registers. Output data and output enable registers for * a given GPIO are contiguous. Eg. GPO0_DOUT_CFG is 0x50 and GPO0_DOEN_CFG is * 0x54 while GPO1_DOUT_CFG is 0x58 and GPO1_DOEN_CFG is 0x5c. The stride * between GPIO registers is effectively 8, thus: GPOn_DOUT_CFG is 0x50 + 8n * and GPOn_DOEN_CFG is 0x54 + 8n. */ #define GPON_DOUT_CFG 0x050 #define GPON_DOEN_CFG 0x054 /* * From Section 12.3, there are 75 input signal configuration registers which * are 4 bytes wide starting with GPI_CPU_JTAG_TCK_CFG at 0x250 and ending with * GPI_USB_OVER_CURRENT_CFG 0x378 */ #define GPI_CFG_OFFSET 0x250 /* * Pad Control Bits. There are 16 pad control bits for each pin located in 103 * 32-bit registers controlling PAD_GPIO[0] to PAD_GPIO[63] followed by * PAD_FUNC_SHARE[0] to PAD_FUNC_SHARE[141]. Odd numbered pins use the upper 16 * bit of each register. */ #define PAD_SLEW_RATE_MASK GENMASK(11, 9) #define PAD_SLEW_RATE_POS 9 #define PAD_BIAS_STRONG_PULL_UP BIT(8) #define PAD_INPUT_ENABLE BIT(7) #define PAD_INPUT_SCHMITT_ENABLE BIT(6) #define PAD_BIAS_DISABLE BIT(5) #define PAD_BIAS_PULL_DOWN BIT(4) #define PAD_BIAS_MASK \ (PAD_BIAS_STRONG_PULL_UP | \ PAD_BIAS_DISABLE | \ PAD_BIAS_PULL_DOWN) #define PAD_DRIVE_STRENGTH_MASK GENMASK(3, 0) #define PAD_DRIVE_STRENGTH_POS 0 /* * From Section 11, the IO_PADSHARE_SEL register can be programmed to select * one of seven pre-defined multiplexed signal groups on PAD_FUNC_SHARE and * PAD_GPIO pads. This is a global setting. */ #define IO_PADSHARE_SEL 0x1a0 /* * This just needs to be some number such that when * sfp->gpio.pin_base = PAD_INVALID_GPIO then * starfive_pin_to_gpio(sfp, validpin) is never a valid GPIO number. * That is it should underflow and return something >= NR_GPIOS. */ #define PAD_INVALID_GPIO 0x10000 /* * The packed pinmux values from the device tree look like this: * * | 31 - 24 | 23 - 16 | 15 - 8 | 7 | 6 | 5 - 0 | * | dout | doen | din | dout rev | doen rev | gpio nr | * * ..but the GPOn_DOUT_CFG and GPOn_DOEN_CFG registers look like this: * * | 31 | 30 - 8 | 7 - 0 | * | dout/doen rev | unused | dout/doen | */ static unsigned int starfive_pinmux_to_gpio(u32 v) { return v & (NR_GPIOS - 1); } static u32 starfive_pinmux_to_dout(u32 v) { return ((v & BIT(7)) << (31 - 7)) | ((v >> 24) & GENMASK(7, 0)); } static u32 starfive_pinmux_to_doen(u32 v) { return ((v & BIT(6)) << (31 - 6)) | ((v >> 16) & GENMASK(7, 0)); } static u32 starfive_pinmux_to_din(u32 v) { return (v >> 8) & GENMASK(7, 0); } /* * The maximum GPIO output current depends on the chosen drive strength: * * DS: 0 1 2 3 4 5 6 7 * mA: 14.2 21.2 28.2 35.2 42.2 49.1 56.0 62.8 * * After rounding that is 7*DS + 14 mA */ static u32 starfive_drive_strength_to_max_mA(u16 ds) { return 7 * ds + 14; } static u16 starfive_drive_strength_from_max_mA(u32 i) { return (clamp(i, 14U, 63U) - 14) / 7; } struct starfive_pinctrl { struct gpio_chip gc; struct pinctrl_gpio_range gpios; raw_spinlock_t lock; void __iomem *base; void __iomem *padctl; struct pinctrl_dev *pctl; struct mutex mutex; /* serialize adding groups and functions */ }; static inline unsigned int starfive_pin_to_gpio(const struct starfive_pinctrl *sfp, unsigned int pin) { return pin - sfp->gpios.pin_base; } static inline unsigned int starfive_gpio_to_pin(const struct starfive_pinctrl *sfp, unsigned int gpio) { return sfp->gpios.pin_base + gpio; } static struct starfive_pinctrl *starfive_from_irq_data(struct irq_data *d) { struct gpio_chip *gc = irq_data_get_irq_chip_data(d); return container_of(gc, struct starfive_pinctrl, gc); } static struct starfive_pinctrl *starfive_from_irq_desc(struct irq_desc *desc) { struct gpio_chip *gc = irq_desc_get_handler_data(desc); return container_of(gc, struct starfive_pinctrl, gc); } static const struct pinctrl_pin_desc starfive_pins[] = { PINCTRL_PIN(PAD_GPIO(0), "GPIO[0]"), PINCTRL_PIN(PAD_GPIO(1), "GPIO[1]"), PINCTRL_PIN(PAD_GPIO(2), "GPIO[2]"), PINCTRL_PIN(PAD_GPIO(3), "GPIO[3]"), PINCTRL_PIN(PAD_GPIO(4), "GPIO[4]"), PINCTRL_PIN(PAD_GPIO(5), "GPIO[5]"), PINCTRL_PIN(PAD_GPIO(6), "GPIO[6]"), PINCTRL_PIN(PAD_GPIO(7), "GPIO[7]"), PINCTRL_PIN(PAD_GPIO(8), "GPIO[8]"), PINCTRL_PIN(PAD_GPIO(9), "GPIO[9]"), PINCTRL_PIN(PAD_GPIO(10), "GPIO[10]"), PINCTRL_PIN(PAD_GPIO(11), "GPIO[11]"), PINCTRL_PIN(PAD_GPIO(12), "GPIO[12]"), PINCTRL_PIN(PAD_GPIO(13), "GPIO[13]"), PINCTRL_PIN(PAD_GPIO(14), "GPIO[14]"), PINCTRL_PIN(PAD_GPIO(15), "GPIO[15]"), PINCTRL_PIN(PAD_GPIO(16), "GPIO[16]"), PINCTRL_PIN(PAD_GPIO(17), "GPIO[17]"), PINCTRL_PIN(PAD_GPIO(18), "GPIO[18]"), PINCTRL_PIN(PAD_GPIO(19), "GPIO[19]"), PINCTRL_PIN(PAD_GPIO(20), "GPIO[20]"), PINCTRL_PIN(PAD_GPIO(21), "GPIO[21]"), PINCTRL_PIN(PAD_GPIO(22), "GPIO[22]"), PINCTRL_PIN(PAD_GPIO(23), "GPIO[23]"), PINCTRL_PIN(PAD_GPIO(24), "GPIO[24]"), PINCTRL_PIN(PAD_GPIO(25), "GPIO[25]"), PINCTRL_PIN(PAD_GPIO(26), "GPIO[26]"), PINCTRL_PIN(PAD_GPIO(27), "GPIO[27]"), PINCTRL_PIN(PAD_GPIO(28), "GPIO[28]"), PINCTRL_PIN(PAD_GPIO(29), "GPIO[29]"), PINCTRL_PIN(PAD_GPIO(30), "GPIO[30]"), PINCTRL_PIN(PAD_GPIO(31), "GPIO[31]"), PINCTRL_PIN(PAD_GPIO(32), "GPIO[32]"), PINCTRL_PIN(PAD_GPIO(33), "GPIO[33]"), PINCTRL_PIN(PAD_GPIO(34), "GPIO[34]"), PINCTRL_PIN(PAD_GPIO(35), "GPIO[35]"), PINCTRL_PIN(PAD_GPIO(36), "GPIO[36]"), PINCTRL_PIN(PAD_GPIO(37), "GPIO[37]"), PINCTRL_PIN(PAD_GPIO(38), "GPIO[38]"), PINCTRL_PIN(PAD_GPIO(39), "GPIO[39]"), PINCTRL_PIN(PAD_GPIO(40), "GPIO[40]"), PINCTRL_PIN(PAD_GPIO(41), "GPIO[41]"), PINCTRL_PIN(PAD_GPIO(42), "GPIO[42]"), PINCTRL_PIN(PAD_GPIO(43), "GPIO[43]"), PINCTRL_PIN(PAD_GPIO(44), "GPIO[44]"), PINCTRL_PIN(PAD_GPIO(45), "GPIO[45]"), PINCTRL_PIN(PAD_GPIO(46), "GPIO[46]"), PINCTRL_PIN(PAD_GPIO(47), "GPIO[47]"), PINCTRL_PIN(PAD_GPIO(48), "GPIO[48]"), PINCTRL_PIN(PAD_GPIO(49), "GPIO[49]"), PINCTRL_PIN(PAD_GPIO(50), "GPIO[50]"), PINCTRL_PIN(PAD_GPIO(51), "GPIO[51]"), PINCTRL_PIN(PAD_GPIO(52), "GPIO[52]"), PINCTRL_PIN(PAD_GPIO(53), "GPIO[53]"), PINCTRL_PIN(PAD_GPIO(54), "GPIO[54]"), PINCTRL_PIN(PAD_GPIO(55), "GPIO[55]"), PINCTRL_PIN(PAD_GPIO(56), "GPIO[56]"), PINCTRL_PIN(PAD_GPIO(57), "GPIO[57]"), PINCTRL_PIN(PAD_GPIO(58), "GPIO[58]"), PINCTRL_PIN(PAD_GPIO(59), "GPIO[59]"), PINCTRL_PIN(PAD_GPIO(60), "GPIO[60]"), PINCTRL_PIN(PAD_GPIO(61), "GPIO[61]"), PINCTRL_PIN(PAD_GPIO(62), "GPIO[62]"), PINCTRL_PIN(PAD_GPIO(63), "GPIO[63]"), PINCTRL_PIN(PAD_FUNC_SHARE(0), "FUNC_SHARE[0]"), PINCTRL_PIN(PAD_FUNC_SHARE(1), "FUNC_SHARE[1]"), PINCTRL_PIN(PAD_FUNC_SHARE(2), "FUNC_SHARE[2]"), PINCTRL_PIN(PAD_FUNC_SHARE(3), "FUNC_SHARE[3]"), PINCTRL_PIN(PAD_FUNC_SHARE(4), "FUNC_SHARE[4]"), PINCTRL_PIN(PAD_FUNC_SHARE(5), "FUNC_SHARE[5]"), PINCTRL_PIN(PAD_FUNC_SHARE(6), "FUNC_SHARE[6]"), PINCTRL_PIN(PAD_FUNC_SHARE(7), "FUNC_SHARE[7]"), PINCTRL_PIN(PAD_FUNC_SHARE(8), "FUNC_SHARE[8]"), PINCTRL_PIN(PAD_FUNC_SHARE(9), "FUNC_SHARE[9]"), PINCTRL_PIN(PAD_FUNC_SHARE(10), "FUNC_SHARE[10]"), PINCTRL_PIN(PAD_FUNC_SHARE(11), "FUNC_SHARE[11]"), PINCTRL_PIN(PAD_FUNC_SHARE(12), "FUNC_SHARE[12]"), PINCTRL_PIN(PAD_FUNC_SHARE(13), "FUNC_SHARE[13]"), PINCTRL_PIN(PAD_FUNC_SHARE(14), "FUNC_SHARE[14]"), PINCTRL_PIN(PAD_FUNC_SHARE(15), "FUNC_SHARE[15]"), PINCTRL_PIN(PAD_FUNC_SHARE(16), "FUNC_SHARE[16]"), PINCTRL_PIN(PAD_FUNC_SHARE(17), "FUNC_SHARE[17]"), PINCTRL_PIN(PAD_FUNC_SHARE(18), "FUNC_SHARE[18]"), PINCTRL_PIN(PAD_FUNC_SHARE(19), "FUNC_SHARE[19]"), PINCTRL_PIN(PAD_FUNC_SHARE(20), "FUNC_SHARE[20]"), PINCTRL_PIN(PAD_FUNC_SHARE(21), "FUNC_SHARE[21]"), PINCTRL_PIN(PAD_FUNC_SHARE(22), "FUNC_SHARE[22]"), PINCTRL_PIN(PAD_FUNC_SHARE(23), "FUNC_SHARE[23]"), PINCTRL_PIN(PAD_FUNC_SHARE(24), "FUNC_SHARE[24]"), PINCTRL_PIN(PAD_FUNC_SHARE(25), "FUNC_SHARE[25]"), PINCTRL_PIN(PAD_FUNC_SHARE(26), "FUNC_SHARE[26]"), PINCTRL_PIN(PAD_FUNC_SHARE(27), "FUNC_SHARE[27]"), PINCTRL_PIN(PAD_FUNC_SHARE(28), "FUNC_SHARE[28]"), PINCTRL_PIN(PAD_FUNC_SHARE(29), "FUNC_SHARE[29]"), PINCTRL_PIN(PAD_FUNC_SHARE(30), "FUNC_SHARE[30]"), PINCTRL_PIN(PAD_FUNC_SHARE(31), "FUNC_SHARE[31]"), PINCTRL_PIN(PAD_FUNC_SHARE(32), "FUNC_SHARE[32]"), PINCTRL_PIN(PAD_FUNC_SHARE(33), "FUNC_SHARE[33]"), PINCTRL_PIN(PAD_FUNC_SHARE(34), "FUNC_SHARE[34]"), PINCTRL_PIN(PAD_FUNC_SHARE(35), "FUNC_SHARE[35]"), PINCTRL_PIN(PAD_FUNC_SHARE(36), "FUNC_SHARE[36]"), PINCTRL_PIN(PAD_FUNC_SHARE(37), "FUNC_SHARE[37]"), PINCTRL_PIN(PAD_FUNC_SHARE(38), "FUNC_SHARE[38]"), PINCTRL_PIN(PAD_FUNC_SHARE(39), "FUNC_SHARE[39]"), PINCTRL_PIN(PAD_FUNC_SHARE(40), "FUNC_SHARE[40]"), PINCTRL_PIN(PAD_FUNC_SHARE(41), "FUNC_SHARE[41]"), PINCTRL_PIN(PAD_FUNC_SHARE(42), "FUNC_SHARE[42]"), PINCTRL_PIN(PAD_FUNC_SHARE(43), "FUNC_SHARE[43]"), PINCTRL_PIN(PAD_FUNC_SHARE(44), "FUNC_SHARE[44]"), PINCTRL_PIN(PAD_FUNC_SHARE(45), "FUNC_SHARE[45]"), PINCTRL_PIN(PAD_FUNC_SHARE(46), "FUNC_SHARE[46]"), PINCTRL_PIN(PAD_FUNC_SHARE(47), "FUNC_SHARE[47]"), PINCTRL_PIN(PAD_FUNC_SHARE(48), "FUNC_SHARE[48]"), PINCTRL_PIN(PAD_FUNC_SHARE(49), "FUNC_SHARE[49]"), PINCTRL_PIN(PAD_FUNC_SHARE(50), "FUNC_SHARE[50]"), PINCTRL_PIN(PAD_FUNC_SHARE(51), "FUNC_SHARE[51]"), PINCTRL_PIN(PAD_FUNC_SHARE(52), "FUNC_SHARE[52]"), PINCTRL_PIN(PAD_FUNC_SHARE(53), "FUNC_SHARE[53]"), PINCTRL_PIN(PAD_FUNC_SHARE(54), "FUNC_SHARE[54]"), PINCTRL_PIN(PAD_FUNC_SHARE(55), "FUNC_SHARE[55]"), PINCTRL_PIN(PAD_FUNC_SHARE(56), "FUNC_SHARE[56]"), PINCTRL_PIN(PAD_FUNC_SHARE(57), "FUNC_SHARE[57]"), PINCTRL_PIN(PAD_FUNC_SHARE(58), "FUNC_SHARE[58]"), PINCTRL_PIN(PAD_FUNC_SHARE(59), "FUNC_SHARE[59]"), PINCTRL_PIN(PAD_FUNC_SHARE(60), "FUNC_SHARE[60]"), PINCTRL_PIN(PAD_FUNC_SHARE(61), "FUNC_SHARE[61]"), PINCTRL_PIN(PAD_FUNC_SHARE(62), "FUNC_SHARE[62]"), PINCTRL_PIN(PAD_FUNC_SHARE(63), "FUNC_SHARE[63]"), PINCTRL_PIN(PAD_FUNC_SHARE(64), "FUNC_SHARE[64]"), PINCTRL_PIN(PAD_FUNC_SHARE(65), "FUNC_SHARE[65]"), PINCTRL_PIN(PAD_FUNC_SHARE(66), "FUNC_SHARE[66]"), PINCTRL_PIN(PAD_FUNC_SHARE(67), "FUNC_SHARE[67]"), PINCTRL_PIN(PAD_FUNC_SHARE(68), "FUNC_SHARE[68]"), PINCTRL_PIN(PAD_FUNC_SHARE(69), "FUNC_SHARE[69]"), PINCTRL_PIN(PAD_FUNC_SHARE(70), "FUNC_SHARE[70]"), PINCTRL_PIN(PAD_FUNC_SHARE(71), "FUNC_SHARE[71]"), PINCTRL_PIN(PAD_FUNC_SHARE(72), "FUNC_SHARE[72]"), PINCTRL_PIN(PAD_FUNC_SHARE(73), "FUNC_SHARE[73]"), PINCTRL_PIN(PAD_FUNC_SHARE(74), "FUNC_SHARE[74]"), PINCTRL_PIN(PAD_FUNC_SHARE(75), "FUNC_SHARE[75]"), PINCTRL_PIN(PAD_FUNC_SHARE(76), "FUNC_SHARE[76]"), PINCTRL_PIN(PAD_FUNC_SHARE(77), "FUNC_SHARE[77]"), PINCTRL_PIN(PAD_FUNC_SHARE(78), "FUNC_SHARE[78]"), PINCTRL_PIN(PAD_FUNC_SHARE(79), "FUNC_SHARE[79]"), PINCTRL_PIN(PAD_FUNC_SHARE(80), "FUNC_SHARE[80]"), PINCTRL_PIN(PAD_FUNC_SHARE(81), "FUNC_SHARE[81]"), PINCTRL_PIN(PAD_FUNC_SHARE(82), "FUNC_SHARE[82]"), PINCTRL_PIN(PAD_FUNC_SHARE(83), "FUNC_SHARE[83]"), PINCTRL_PIN(PAD_FUNC_SHARE(84), "FUNC_SHARE[84]"), PINCTRL_PIN(PAD_FUNC_SHARE(85), "FUNC_SHARE[85]"), PINCTRL_PIN(PAD_FUNC_SHARE(86), "FUNC_SHARE[86]"), PINCTRL_PIN(PAD_FUNC_SHARE(87), "FUNC_SHARE[87]"), PINCTRL_PIN(PAD_FUNC_SHARE(88), "FUNC_SHARE[88]"), PINCTRL_PIN(PAD_FUNC_SHARE(89), "FUNC_SHARE[89]"), PINCTRL_PIN(PAD_FUNC_SHARE(90), "FUNC_SHARE[90]"), PINCTRL_PIN(PAD_FUNC_SHARE(91), "FUNC_SHARE[91]"), PINCTRL_PIN(PAD_FUNC_SHARE(92), "FUNC_SHARE[92]"), PINCTRL_PIN(PAD_FUNC_SHARE(93), "FUNC_SHARE[93]"), PINCTRL_PIN(PAD_FUNC_SHARE(94), "FUNC_SHARE[94]"), PINCTRL_PIN(PAD_FUNC_SHARE(95), "FUNC_SHARE[95]"), PINCTRL_PIN(PAD_FUNC_SHARE(96), "FUNC_SHARE[96]"), PINCTRL_PIN(PAD_FUNC_SHARE(97), "FUNC_SHARE[97]"), PINCTRL_PIN(PAD_FUNC_SHARE(98), "FUNC_SHARE[98]"), PINCTRL_PIN(PAD_FUNC_SHARE(99), "FUNC_SHARE[99]"), PINCTRL_PIN(PAD_FUNC_SHARE(100), "FUNC_SHARE[100]"), PINCTRL_PIN(PAD_FUNC_SHARE(101), "FUNC_SHARE[101]"), PINCTRL_PIN(PAD_FUNC_SHARE(102), "FUNC_SHARE[102]"), PINCTRL_PIN(PAD_FUNC_SHARE(103), "FUNC_SHARE[103]"), PINCTRL_PIN(PAD_FUNC_SHARE(104), "FUNC_SHARE[104]"), PINCTRL_PIN(PAD_FUNC_SHARE(105), "FUNC_SHARE[105]"), PINCTRL_PIN(PAD_FUNC_SHARE(106), "FUNC_SHARE[106]"), PINCTRL_PIN(PAD_FUNC_SHARE(107), "FUNC_SHARE[107]"), PINCTRL_PIN(PAD_FUNC_SHARE(108), "FUNC_SHARE[108]"), PINCTRL_PIN(PAD_FUNC_SHARE(109), "FUNC_SHARE[109]"), PINCTRL_PIN(PAD_FUNC_SHARE(110), "FUNC_SHARE[110]"), PINCTRL_PIN(PAD_FUNC_SHARE(111), "FUNC_SHARE[111]"), PINCTRL_PIN(PAD_FUNC_SHARE(112), "FUNC_SHARE[112]"), PINCTRL_PIN(PAD_FUNC_SHARE(113), "FUNC_SHARE[113]"), PINCTRL_PIN(PAD_FUNC_SHARE(114), "FUNC_SHARE[114]"), PINCTRL_PIN(PAD_FUNC_SHARE(115), "FUNC_SHARE[115]"), PINCTRL_PIN(PAD_FUNC_SHARE(116), "FUNC_SHARE[116]"), PINCTRL_PIN(PAD_FUNC_SHARE(117), "FUNC_SHARE[117]"), PINCTRL_PIN(PAD_FUNC_SHARE(118), "FUNC_SHARE[118]"), PINCTRL_PIN(PAD_FUNC_SHARE(119), "FUNC_SHARE[119]"), PINCTRL_PIN(PAD_FUNC_SHARE(120), "FUNC_SHARE[120]"), PINCTRL_PIN(PAD_FUNC_SHARE(121), "FUNC_SHARE[121]"), PINCTRL_PIN(PAD_FUNC_SHARE(122), "FUNC_SHARE[122]"), PINCTRL_PIN(PAD_FUNC_SHARE(123), "FUNC_SHARE[123]"), PINCTRL_PIN(PAD_FUNC_SHARE(124), "FUNC_SHARE[124]"), PINCTRL_PIN(PAD_FUNC_SHARE(125), "FUNC_SHARE[125]"), PINCTRL_PIN(PAD_FUNC_SHARE(126), "FUNC_SHARE[126]"), PINCTRL_PIN(PAD_FUNC_SHARE(127), "FUNC_SHARE[127]"), PINCTRL_PIN(PAD_FUNC_SHARE(128), "FUNC_SHARE[128]"), PINCTRL_PIN(PAD_FUNC_SHARE(129), "FUNC_SHARE[129]"), PINCTRL_PIN(PAD_FUNC_SHARE(130), "FUNC_SHARE[130]"), PINCTRL_PIN(PAD_FUNC_SHARE(131), "FUNC_SHARE[131]"), PINCTRL_PIN(PAD_FUNC_SHARE(132), "FUNC_SHARE[132]"), PINCTRL_PIN(PAD_FUNC_SHARE(133), "FUNC_SHARE[133]"), PINCTRL_PIN(PAD_FUNC_SHARE(134), "FUNC_SHARE[134]"), PINCTRL_PIN(PAD_FUNC_SHARE(135), "FUNC_SHARE[135]"), PINCTRL_PIN(PAD_FUNC_SHARE(136), "FUNC_SHARE[136]"), PINCTRL_PIN(PAD_FUNC_SHARE(137), "FUNC_SHARE[137]"), PINCTRL_PIN(PAD_FUNC_SHARE(138), "FUNC_SHARE[138]"), PINCTRL_PIN(PAD_FUNC_SHARE(139), "FUNC_SHARE[139]"), PINCTRL_PIN(PAD_FUNC_SHARE(140), "FUNC_SHARE[140]"), PINCTRL_PIN(PAD_FUNC_SHARE(141), "FUNC_SHARE[141]"), }; #ifdef CONFIG_DEBUG_FS static void starfive_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, unsigned int pin) { struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev); unsigned int gpio = starfive_pin_to_gpio(sfp, pin); void __iomem *reg; u32 dout, doen; if (gpio >= NR_GPIOS) return; reg = sfp->base + GPON_DOUT_CFG + 8 * gpio; dout = readl_relaxed(reg + 0x000); doen = readl_relaxed(reg + 0x004); seq_printf(s, "dout=%lu%s doen=%lu%s", dout & GENMASK(7, 0), (dout & BIT(31)) ? "r" : "", doen & GENMASK(7, 0), (doen & BIT(31)) ? "r" : ""); } #else #define starfive_pin_dbg_show NULL #endif static int starfive_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node *np, struct pinctrl_map **maps, unsigned int *num_maps) { struct starfive_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; u32 *pinmux; int ngroups; int *pins; int nmaps; int ret; nmaps = 0; ngroups = 0; for_each_child_of_node(np, child) { int npinmux = of_property_count_u32_elems(child, "pinmux"); int npins = of_property_count_u32_elems(child, "pins"); if (npinmux > 0 && npins > 0) { dev_err(dev, "invalid pinctrl group %pOFn.%pOFn: both pinmux and pins set\n", np, child); of_node_put(child); return -EINVAL; } if (npinmux == 0 && npins == 0) { dev_err(dev, "invalid pinctrl group %pOFn.%pOFn: neither pinmux nor pins set\n", np, child); of_node_put(child); return -EINVAL; } if (npinmux > 0) nmaps += 2; else nmaps += 1; ngroups += 1; } 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; int i; grpname = devm_kasprintf(dev, GFP_KERNEL, "%pOFn.%pOFn", np, child); if (!grpname) { ret = -ENOMEM; goto put_child; } pgnames[ngroups++] = grpname; if ((npins = of_property_count_u32_elems(child, "pinmux")) > 0) { 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++) { unsigned int gpio = starfive_pinmux_to_gpio(pinmux[i]); pins[i] = starfive_gpio_to_pin(sfp, gpio); } map[nmaps].type = PIN_MAP_TYPE_MUX_GROUP; map[nmaps].data.mux.function = np->name; map[nmaps].data.mux.group = grpname; nmaps += 1; } else if ((npins = of_property_count_u32_elems(child, "pins")) > 0) { pins = devm_kcalloc(dev, npins, sizeof(*pins), GFP_KERNEL); if (!pins) { ret = -ENOMEM; goto put_child; } pinmux = NULL; for (i = 0; i < npins; i++) { u32 v; ret = of_property_read_u32_index(child, "pins", i, &v); if (ret) goto put_child; pins[i] = v; } } else { ret = -EINVAL; goto put_child; } 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; } *maps = map; *num_maps = nmaps; mutex_unlock(&sfp->mutex); 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 starfive_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 = starfive_pin_dbg_show, .dt_node_to_map = starfive_dt_node_to_map, .dt_free_map = pinctrl_utils_free_map, }; static int starfive_set_mux(struct pinctrl_dev *pctldev, unsigned int fsel, unsigned int gsel) { struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev); struct device *dev = sfp->gc.parent; 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]; unsigned int gpio = starfive_pinmux_to_gpio(v); u32 dout = starfive_pinmux_to_dout(v); u32 doen = starfive_pinmux_to_doen(v); u32 din = starfive_pinmux_to_din(v); void __iomem *reg_dout; void __iomem *reg_doen; void __iomem *reg_din; unsigned long flags; dev_dbg(dev, "GPIO%u: dout=0x%x doen=0x%x din=0x%x\n", gpio, dout, doen, din); reg_dout = sfp->base + GPON_DOUT_CFG + 8 * gpio; reg_doen = sfp->base + GPON_DOEN_CFG + 8 * gpio; if (din != GPI_NONE) reg_din = sfp->base + GPI_CFG_OFFSET + 4 * din; else reg_din = NULL; raw_spin_lock_irqsave(&sfp->lock, flags); writel_relaxed(dout, reg_dout); writel_relaxed(doen, reg_doen); if (reg_din) writel_relaxed(gpio + 2, reg_din); raw_spin_unlock_irqrestore(&sfp->lock, flags); } return 0; } static const struct pinmux_ops starfive_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 = starfive_set_mux, .strict = true, }; static u16 starfive_padctl_get(struct starfive_pinctrl *sfp, unsigned int pin) { void __iomem *reg = sfp->padctl + 4 * (pin / 2); int shift = 16 * (pin % 2); return readl_relaxed(reg) >> shift; } static void starfive_padctl_rmw(struct starfive_pinctrl *sfp, unsigned int pin, u16 _mask, u16 _value) { void __iomem *reg = sfp->padctl + 4 * (pin / 2); int shift = 16 * (pin % 2); u32 mask = (u32)_mask << shift; u32 value = (u32)_value << shift; unsigned long flags; dev_dbg(sfp->gc.parent, "padctl_rmw(%u, 0x%03x, 0x%03x)\n", pin, _mask, _value); raw_spin_lock_irqsave(&sfp->lock, flags); value |= readl_relaxed(reg) & ~mask; writel_relaxed(value, reg); raw_spin_unlock_irqrestore(&sfp->lock, flags); } #define PIN_CONFIG_STARFIVE_STRONG_PULL_UP (PIN_CONFIG_END + 1) static const struct pinconf_generic_params starfive_pinconf_custom_params[] = { { "starfive,strong-pull-up", PIN_CONFIG_STARFIVE_STRONG_PULL_UP, 1 }, }; #ifdef CONFIG_DEBUG_FS static const struct pin_config_item starfive_pinconf_custom_conf_items[] = { PCONFDUMP(PIN_CONFIG_STARFIVE_STRONG_PULL_UP, "input bias strong pull-up", NULL, false), }; static_assert(ARRAY_SIZE(starfive_pinconf_custom_conf_items) == ARRAY_SIZE(starfive_pinconf_custom_params)); #else #define starfive_pinconf_custom_conf_items NULL #endif static int starfive_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *config) { struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev); int param = pinconf_to_config_param(*config); u16 value = starfive_padctl_get(sfp, pin); bool enabled; u32 arg; switch (param) { case PIN_CONFIG_BIAS_DISABLE: enabled = value & PAD_BIAS_DISABLE; arg = 0; break; case PIN_CONFIG_BIAS_PULL_DOWN: enabled = value & PAD_BIAS_PULL_DOWN; arg = 1; break; case PIN_CONFIG_BIAS_PULL_UP: enabled = !(value & PAD_BIAS_MASK); arg = 1; break; case PIN_CONFIG_DRIVE_STRENGTH: enabled = value & PAD_DRIVE_STRENGTH_MASK; arg = starfive_drive_strength_to_max_mA(value & PAD_DRIVE_STRENGTH_MASK); break; case PIN_CONFIG_INPUT_ENABLE: enabled = value & PAD_INPUT_ENABLE; arg = enabled; break; case PIN_CONFIG_INPUT_SCHMITT_ENABLE: enabled = value & PAD_INPUT_SCHMITT_ENABLE; arg = enabled; break; case PIN_CONFIG_SLEW_RATE: enabled = value & PAD_SLEW_RATE_MASK; arg = (value & PAD_SLEW_RATE_MASK) >> PAD_SLEW_RATE_POS; break; case PIN_CONFIG_STARFIVE_STRONG_PULL_UP: enabled = value & PAD_BIAS_STRONG_PULL_UP; arg = enabled; break; default: return -ENOTSUPP; } *config = pinconf_to_config_packed(param, arg); return enabled ? 0 : -EINVAL; } static int starfive_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 starfive_pinconf_get(pctldev, group->pins[0], config); } static int starfive_pinconf_group_set(struct pinctrl_dev *pctldev, unsigned int gsel, unsigned long *configs, unsigned int num_configs) { struct starfive_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 |= PAD_BIAS_MASK; value = (value & ~PAD_BIAS_MASK) | PAD_BIAS_DISABLE; break; case PIN_CONFIG_BIAS_PULL_DOWN: if (arg == 0) return -ENOTSUPP; mask |= PAD_BIAS_MASK; value = (value & ~PAD_BIAS_MASK) | PAD_BIAS_PULL_DOWN; break; case PIN_CONFIG_BIAS_PULL_UP: if (arg == 0) return -ENOTSUPP; mask |= PAD_BIAS_MASK; value = value & ~PAD_BIAS_MASK; break; case PIN_CONFIG_DRIVE_STRENGTH: mask |= PAD_DRIVE_STRENGTH_MASK; value = (value & ~PAD_DRIVE_STRENGTH_MASK) | starfive_drive_strength_from_max_mA(arg); break; case PIN_CONFIG_INPUT_ENABLE: mask |= PAD_INPUT_ENABLE; if (arg) value |= PAD_INPUT_ENABLE; else value &= ~PAD_INPUT_ENABLE; break; case PIN_CONFIG_INPUT_SCHMITT_ENABLE: mask |= PAD_INPUT_SCHMITT_ENABLE; if (arg) value |= PAD_INPUT_SCHMITT_ENABLE; else value &= ~PAD_INPUT_SCHMITT_ENABLE; break; case PIN_CONFIG_SLEW_RATE: mask |= PAD_SLEW_RATE_MASK; value = (value & ~PAD_SLEW_RATE_MASK) | ((arg << PAD_SLEW_RATE_POS) & PAD_SLEW_RATE_MASK); break; case PIN_CONFIG_STARFIVE_STRONG_PULL_UP: if (arg) { mask |= PAD_BIAS_MASK; value = (value & ~PAD_BIAS_MASK) | PAD_BIAS_STRONG_PULL_UP; } else { mask |= PAD_BIAS_STRONG_PULL_UP; value = value & ~PAD_BIAS_STRONG_PULL_UP; } break; default: return -ENOTSUPP; } } for (i = 0; i < group->num_pins; i++) starfive_padctl_rmw(sfp, group->pins[i], mask, value); return 0; } #ifdef CONFIG_DEBUG_FS static void starfive_pinconf_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, unsigned int pin) { struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev); u16 value = starfive_padctl_get(sfp, pin); seq_printf(s, " (0x%03x)", value); } #else #define starfive_pinconf_dbg_show NULL #endif static const struct pinconf_ops starfive_pinconf_ops = { .pin_config_get = starfive_pinconf_get, .pin_config_group_get = starfive_pinconf_group_get, .pin_config_group_set = starfive_pinconf_group_set, .pin_config_dbg_show = starfive_pinconf_dbg_show, .is_generic = true, }; static struct pinctrl_desc starfive_desc = { .name = DRIVER_NAME, .pins = starfive_pins, .npins = ARRAY_SIZE(starfive_pins), .pctlops = &starfive_pinctrl_ops, .pmxops = &starfive_pinmux_ops, .confops = &starfive_pinconf_ops, .owner = THIS_MODULE, .num_custom_params = ARRAY_SIZE(starfive_pinconf_custom_params), .custom_params = starfive_pinconf_custom_params, .custom_conf_items = starfive_pinconf_custom_conf_items, }; static int starfive_gpio_request(struct gpio_chip *gc, unsigned int gpio) { return pinctrl_gpio_request(gc->base + gpio); } static void starfive_gpio_free(struct gpio_chip *gc, unsigned int gpio) { pinctrl_gpio_free(gc->base + gpio); } static int starfive_gpio_get_direction(struct gpio_chip *gc, unsigned int gpio) { struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); void __iomem *doen = sfp->base + GPON_DOEN_CFG + 8 * gpio; if (readl_relaxed(doen) == GPO_ENABLE) return GPIO_LINE_DIRECTION_OUT; return GPIO_LINE_DIRECTION_IN; } static int starfive_gpio_direction_input(struct gpio_chip *gc, unsigned int gpio) { struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); void __iomem *doen = sfp->base + GPON_DOEN_CFG + 8 * gpio; unsigned long flags; /* enable input and schmitt trigger */ starfive_padctl_rmw(sfp, starfive_gpio_to_pin(sfp, gpio), PAD_INPUT_ENABLE | PAD_INPUT_SCHMITT_ENABLE, PAD_INPUT_ENABLE | PAD_INPUT_SCHMITT_ENABLE); raw_spin_lock_irqsave(&sfp->lock, flags); writel_relaxed(GPO_DISABLE, doen); raw_spin_unlock_irqrestore(&sfp->lock, flags); return 0; } static int starfive_gpio_direction_output(struct gpio_chip *gc, unsigned int gpio, int value) { struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); void __iomem *dout = sfp->base + GPON_DOUT_CFG + 8 * gpio; void __iomem *doen = sfp->base + GPON_DOEN_CFG + 8 * gpio; unsigned long flags; raw_spin_lock_irqsave(&sfp->lock, flags); writel_relaxed(value, dout); writel_relaxed(GPO_ENABLE, doen); raw_spin_unlock_irqrestore(&sfp->lock, flags); /* disable input, schmitt trigger and bias */ starfive_padctl_rmw(sfp, starfive_gpio_to_pin(sfp, gpio), PAD_BIAS_MASK | PAD_INPUT_ENABLE | PAD_INPUT_SCHMITT_ENABLE, PAD_BIAS_DISABLE); return 0; } static int starfive_gpio_get(struct gpio_chip *gc, unsigned int gpio) { struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); void __iomem *din = sfp->base + GPIODIN + 4 * (gpio / 32); return !!(readl_relaxed(din) & BIT(gpio % 32)); } static void starfive_gpio_set(struct gpio_chip *gc, unsigned int gpio, int value) { struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); void __iomem *dout = sfp->base + GPON_DOUT_CFG + 8 * gpio; unsigned long flags; raw_spin_lock_irqsave(&sfp->lock, flags); writel_relaxed(value, dout); raw_spin_unlock_irqrestore(&sfp->lock, flags); } static int starfive_gpio_set_config(struct gpio_chip *gc, unsigned int gpio, unsigned long config) { struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); u32 arg = pinconf_to_config_argument(config); u16 value; u16 mask; switch (pinconf_to_config_param(config)) { case PIN_CONFIG_BIAS_DISABLE: mask = PAD_BIAS_MASK; value = PAD_BIAS_DISABLE; break; case PIN_CONFIG_BIAS_PULL_DOWN: if (arg == 0) return -ENOTSUPP; mask = PAD_BIAS_MASK; value = PAD_BIAS_PULL_DOWN; break; case PIN_CONFIG_BIAS_PULL_UP: if (arg == 0) return -ENOTSUPP; mask = PAD_BIAS_MASK; value = 0; break; case PIN_CONFIG_DRIVE_PUSH_PULL: return 0; case PIN_CONFIG_INPUT_ENABLE: mask = PAD_INPUT_ENABLE; value = arg ? PAD_INPUT_ENABLE : 0; break; case PIN_CONFIG_INPUT_SCHMITT_ENABLE: mask = PAD_INPUT_SCHMITT_ENABLE; value = arg ? PAD_INPUT_SCHMITT_ENABLE : 0; break; default: return -ENOTSUPP; } starfive_padctl_rmw(sfp, starfive_gpio_to_pin(sfp, gpio), mask, value); return 0; } static int starfive_gpio_add_pin_ranges(struct gpio_chip *gc) { struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); sfp->gpios.name = sfp->gc.label; sfp->gpios.base = sfp->gc.base; /* * sfp->gpios.pin_base depends on the chosen signal group * and is set in starfive_probe() */ sfp->gpios.npins = NR_GPIOS; sfp->gpios.gc = &sfp->gc; pinctrl_add_gpio_range(sfp->pctl, &sfp->gpios); return 0; } static void starfive_irq_ack(struct irq_data *d) { struct starfive_pinctrl *sfp = starfive_from_irq_data(d); irq_hw_number_t gpio = irqd_to_hwirq(d); void __iomem *ic = sfp->base + GPIOIC + 4 * (gpio / 32); u32 mask = BIT(gpio % 32); unsigned long flags; raw_spin_lock_irqsave(&sfp->lock, flags); writel_relaxed(mask, ic); raw_spin_unlock_irqrestore(&sfp->lock, flags); } static void starfive_irq_mask(struct irq_data *d) { struct starfive_pinctrl *sfp = starfive_from_irq_data(d); irq_hw_number_t gpio = irqd_to_hwirq(d); void __iomem *ie = sfp->base + GPIOIE + 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, gpio); } static void starfive_irq_mask_ack(struct irq_data *d) { struct starfive_pinctrl *sfp = starfive_from_irq_data(d); irq_hw_number_t gpio = irqd_to_hwirq(d); void __iomem *ie = sfp->base + GPIOIE + 4 * (gpio / 32); void __iomem *ic = sfp->base + GPIOIC + 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); writel_relaxed(mask, ic); raw_spin_unlock_irqrestore(&sfp->lock, flags); } static void starfive_irq_unmask(struct irq_data *d) { struct starfive_pinctrl *sfp = starfive_from_irq_data(d); irq_hw_number_t gpio = irqd_to_hwirq(d); void __iomem *ie = sfp->base + GPIOIE + 4 * (gpio / 32); u32 mask = BIT(gpio % 32); unsigned long flags; u32 value; gpiochip_enable_irq(&sfp->gc, gpio); 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 starfive_irq_set_type(struct irq_data *d, unsigned int trigger) { struct starfive_pinctrl *sfp = starfive_from_irq_data(d); 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 + GPIOIS) & ~mask; writel_relaxed(irq_type, base + GPIOIS); edge_both |= readl_relaxed(base + GPIOIBE) & ~mask; writel_relaxed(edge_both, base + GPIOIBE); polarity |= readl_relaxed(base + GPIOIEV) & ~mask; writel_relaxed(polarity, base + GPIOIEV); raw_spin_unlock_irqrestore(&sfp->lock, flags); return 0; } static const struct irq_chip starfive_irq_chip = { .name = "StarFive GPIO", .irq_ack = starfive_irq_ack, .irq_mask = starfive_irq_mask, .irq_mask_ack = starfive_irq_mask_ack, .irq_unmask = starfive_irq_unmask, .irq_set_type = starfive_irq_set_type, .flags = IRQCHIP_IMMUTABLE | IRQCHIP_SET_TYPE_MASKED, GPIOCHIP_IRQ_RESOURCE_HELPERS, }; static void starfive_gpio_irq_handler(struct irq_desc *desc) { struct starfive_pinctrl *sfp = starfive_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 + GPIOMIS + 0); for_each_set_bit(pin, &mis, 32) generic_handle_domain_irq(sfp->gc.irq.domain, pin); mis = readl_relaxed(sfp->base + GPIOMIS + 4); for_each_set_bit(pin, &mis, 32) generic_handle_domain_irq(sfp->gc.irq.domain, pin + 32); chained_irq_exit(chip, desc); } static int starfive_gpio_init_hw(struct gpio_chip *gc) { struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); /* mask all GPIO interrupts */ writel(0, sfp->base + GPIOIE + 0); writel(0, sfp->base + GPIOIE + 4); /* clear edge interrupt flags */ writel(~0U, sfp->base + GPIOIC + 0); writel(~0U, sfp->base + GPIOIC + 4); /* enable GPIO interrupts */ writel(1, sfp->base + GPIOEN); return 0; } static void starfive_disable_clock(void *data) { clk_disable_unprepare(data); } static int starfive_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct starfive_pinctrl *sfp; struct reset_control *rst; struct clk *clk; u32 value; int ret; sfp = devm_kzalloc(dev, sizeof(*sfp), GFP_KERNEL); if (!sfp) return -ENOMEM; sfp->base = devm_platform_ioremap_resource_byname(pdev, "gpio"); if (IS_ERR(sfp->base)) return PTR_ERR(sfp->base); sfp->padctl = devm_platform_ioremap_resource_byname(pdev, "padctl"); if (IS_ERR(sfp->padctl)) return PTR_ERR(sfp->padctl); clk = devm_clk_get(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"); 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, starfive_disable_clock, clk); if (ret) return ret; /* * 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"); 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, &starfive_desc, sfp, &sfp->pctl); if (ret) return dev_err_probe(dev, ret, "could not register pinctrl driver\n"); if (!of_property_read_u32(dev->of_node, "starfive,signal-group", &value)) { if (value > 6) return dev_err_probe(dev, -EINVAL, "invalid signal group %u\n", value); writel(value, sfp->padctl + IO_PADSHARE_SEL); } value = readl(sfp->padctl + IO_PADSHARE_SEL); switch (value) { case 0: sfp->gpios.pin_base = PAD_INVALID_GPIO; goto out_pinctrl_enable; case 1: sfp->gpios.pin_base = PAD_GPIO(0); break; case 2: sfp->gpios.pin_base = PAD_FUNC_SHARE(72); break; case 3: sfp->gpios.pin_base = PAD_FUNC_SHARE(70); break; case 4: case 5: case 6: sfp->gpios.pin_base = PAD_FUNC_SHARE(0); break; default: return dev_err_probe(dev, -EINVAL, "invalid signal group %u\n", value); } sfp->gc.label = dev_name(dev); sfp->gc.owner = THIS_MODULE; sfp->gc.request = starfive_gpio_request; sfp->gc.free = starfive_gpio_free; sfp->gc.get_direction = starfive_gpio_get_direction; sfp->gc.direction_input = starfive_gpio_direction_input; sfp->gc.direction_output = starfive_gpio_direction_output; sfp->gc.get = starfive_gpio_get; sfp->gc.set = starfive_gpio_set; sfp->gc.set_config = starfive_gpio_set_config; sfp->gc.add_pin_ranges = starfive_gpio_add_pin_ranges; sfp->gc.base = -1; sfp->gc.ngpio = NR_GPIOS; gpio_irq_chip_set_chip(&sfp->gc.irq, &starfive_irq_chip); sfp->gc.irq.parent_handler = starfive_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 = starfive_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); out_pinctrl_enable: return pinctrl_enable(sfp->pctl); } static const struct of_device_id starfive_of_match[] = { { .compatible = "starfive,jh7100-pinctrl" }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, starfive_of_match); static struct platform_driver starfive_pinctrl_driver = { .probe = starfive_probe, .driver = { .name = DRIVER_NAME, .of_match_table = starfive_of_match, }, }; module_platform_driver(starfive_pinctrl_driver); MODULE_DESCRIPTION("Pinctrl driver for StarFive SoCs"); MODULE_AUTHOR("Emil Renner Berthing <kernel@esmil.dk>"); MODULE_LICENSE("GPL v2");
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