1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Pinctrl / GPIO driver for StarFive JH7110 SoC aon controller
4 *
5 * Copyright (C) 2022 StarFive Technology Co., Ltd.
6 */
7
8 #include <linux/err.h>
9 #include <linux/gpio/driver.h>
10 #include <linux/init.h>
11 #include <linux/interrupt.h>
12 #include <linux/io.h>
13 #include <linux/mod_devicetable.h>
14 #include <linux/module.h>
15 #include <linux/pinctrl/pinconf.h>
16 #include <linux/pinctrl/pinconf-generic.h>
17 #include <linux/pinctrl/pinctrl.h>
18 #include <linux/pinctrl/pinmux.h>
19 #include <linux/platform_device.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/regmap.h>
22 #include <linux/slab.h>
23
24 #include <dt-bindings/pinctrl/starfive,jh7110-pinctrl.h>
25
26 #include "../core.h"
27 #include "../pinconf.h"
28 #include "../pinmux.h"
29 #include "pinctrl-starfive-jh7110.h"
30
31 #define JH7110_AON_NGPIO 4
32 #define JH7110_AON_GC_BASE 64
33
34 #define JH7110_AON_REGS_NUM 37
35
36 /* registers */
37 #define JH7110_AON_DOEN 0x0
38 #define JH7110_AON_DOUT 0x4
39 #define JH7110_AON_GPI 0x8
40 #define JH7110_AON_GPIOIN 0x2c
41
42 #define JH7110_AON_GPIOEN 0xc
43 #define JH7110_AON_GPIOIS 0x10
44 #define JH7110_AON_GPIOIC 0x14
45 #define JH7110_AON_GPIOIBE 0x18
46 #define JH7110_AON_GPIOIEV 0x1c
47 #define JH7110_AON_GPIOIE 0x20
48 #define JH7110_AON_GPIORIS 0x28
49 #define JH7110_AON_GPIOMIS 0x28
50
51 #define JH7110_AON_GPO_PDA_0_5_CFG 0x30
52
53 static const struct pinctrl_pin_desc jh7110_aon_pins[] = {
54 PINCTRL_PIN(PAD_TESTEN, "TESTEN"),
55 PINCTRL_PIN(PAD_RGPIO0, "RGPIO0"),
56 PINCTRL_PIN(PAD_RGPIO1, "RGPIO1"),
57 PINCTRL_PIN(PAD_RGPIO2, "RGPIO2"),
58 PINCTRL_PIN(PAD_RGPIO3, "RGPIO3"),
59 PINCTRL_PIN(PAD_RSTN, "RSTN"),
60 PINCTRL_PIN(PAD_GMAC0_MDC, "GMAC0_MDC"),
61 PINCTRL_PIN(PAD_GMAC0_MDIO, "GMAC0_MDIO"),
62 PINCTRL_PIN(PAD_GMAC0_RXD0, "GMAC0_RXD0"),
63 PINCTRL_PIN(PAD_GMAC0_RXD1, "GMAC0_RXD1"),
64 PINCTRL_PIN(PAD_GMAC0_RXD2, "GMAC0_RXD2"),
65 PINCTRL_PIN(PAD_GMAC0_RXD3, "GMAC0_RXD3"),
66 PINCTRL_PIN(PAD_GMAC0_RXDV, "GMAC0_RXDV"),
67 PINCTRL_PIN(PAD_GMAC0_RXC, "GMAC0_RXC"),
68 PINCTRL_PIN(PAD_GMAC0_TXD0, "GMAC0_TXD0"),
69 PINCTRL_PIN(PAD_GMAC0_TXD1, "GMAC0_TXD1"),
70 PINCTRL_PIN(PAD_GMAC0_TXD2, "GMAC0_TXD2"),
71 PINCTRL_PIN(PAD_GMAC0_TXD3, "GMAC0_TXD3"),
72 PINCTRL_PIN(PAD_GMAC0_TXEN, "GMAC0_TXEN"),
73 PINCTRL_PIN(PAD_GMAC0_TXC, "GMAC0_TXC"),
74 };
75
jh7110_aon_set_one_pin_mux(struct jh7110_pinctrl * sfp,unsigned int pin,unsigned int din,u32 dout,u32 doen,u32 func)76 static int jh7110_aon_set_one_pin_mux(struct jh7110_pinctrl *sfp,
77 unsigned int pin,
78 unsigned int din, u32 dout,
79 u32 doen, u32 func)
80 {
81 if (pin < sfp->gc.ngpio && func == 0)
82 jh7110_set_gpiomux(sfp, pin, din, dout, doen);
83
84 return 0;
85 }
86
jh7110_aon_get_padcfg_base(struct jh7110_pinctrl * sfp,unsigned int pin)87 static int jh7110_aon_get_padcfg_base(struct jh7110_pinctrl *sfp,
88 unsigned int pin)
89 {
90 if (pin < PAD_GMAC0_MDC)
91 return JH7110_AON_GPO_PDA_0_5_CFG;
92
93 return -1;
94 }
95
jh7110_aon_irq_handler(struct irq_desc * desc)96 static void jh7110_aon_irq_handler(struct irq_desc *desc)
97 {
98 struct jh7110_pinctrl *sfp = jh7110_from_irq_desc(desc);
99 struct irq_chip *chip = irq_desc_get_chip(desc);
100 unsigned long mis;
101 unsigned int pin;
102
103 chained_irq_enter(chip, desc);
104
105 mis = readl_relaxed(sfp->base + JH7110_AON_GPIOMIS);
106 for_each_set_bit(pin, &mis, JH7110_AON_NGPIO)
107 generic_handle_domain_irq(sfp->gc.irq.domain, pin);
108
109 chained_irq_exit(chip, desc);
110 }
111
jh7110_aon_init_hw(struct gpio_chip * gc)112 static int jh7110_aon_init_hw(struct gpio_chip *gc)
113 {
114 struct jh7110_pinctrl *sfp = container_of(gc,
115 struct jh7110_pinctrl, gc);
116
117 /* mask all GPIO interrupts */
118 writel_relaxed(0, sfp->base + JH7110_AON_GPIOIE);
119 /* clear edge interrupt flags */
120 writel_relaxed(0, sfp->base + JH7110_AON_GPIOIC);
121 writel_relaxed(0x0f, sfp->base + JH7110_AON_GPIOIC);
122 /* enable GPIO interrupts */
123 writel_relaxed(1, sfp->base + JH7110_AON_GPIOEN);
124 return 0;
125 }
126
127 static const struct jh7110_gpio_irq_reg jh7110_aon_irq_reg = {
128 .is_reg_base = JH7110_AON_GPIOIS,
129 .ic_reg_base = JH7110_AON_GPIOIC,
130 .ibe_reg_base = JH7110_AON_GPIOIBE,
131 .iev_reg_base = JH7110_AON_GPIOIEV,
132 .ie_reg_base = JH7110_AON_GPIOIE,
133 .ris_reg_base = JH7110_AON_GPIORIS,
134 .mis_reg_base = JH7110_AON_GPIOMIS,
135 };
136
137 static const struct jh7110_pinctrl_soc_info jh7110_aon_pinctrl_info = {
138 .pins = jh7110_aon_pins,
139 .npins = ARRAY_SIZE(jh7110_aon_pins),
140 .ngpios = JH7110_AON_NGPIO,
141 .gc_base = JH7110_AON_GC_BASE,
142 .dout_reg_base = JH7110_AON_DOUT,
143 .dout_mask = GENMASK(3, 0),
144 .doen_reg_base = JH7110_AON_DOEN,
145 .doen_mask = GENMASK(2, 0),
146 .gpi_reg_base = JH7110_AON_GPI,
147 .gpi_mask = GENMASK(3, 0),
148 .gpioin_reg_base = JH7110_AON_GPIOIN,
149 .irq_reg = &jh7110_aon_irq_reg,
150 .nsaved_regs = JH7110_AON_REGS_NUM,
151 .jh7110_set_one_pin_mux = jh7110_aon_set_one_pin_mux,
152 .jh7110_get_padcfg_base = jh7110_aon_get_padcfg_base,
153 .jh7110_gpio_irq_handler = jh7110_aon_irq_handler,
154 .jh7110_gpio_init_hw = jh7110_aon_init_hw,
155 };
156
157 static const struct of_device_id jh7110_aon_pinctrl_of_match[] = {
158 {
159 .compatible = "starfive,jh7110-aon-pinctrl",
160 .data = &jh7110_aon_pinctrl_info,
161 },
162 { /* sentinel */ }
163 };
164 MODULE_DEVICE_TABLE(of, jh7110_aon_pinctrl_of_match);
165
166 static struct platform_driver jh7110_aon_pinctrl_driver = {
167 .probe = jh7110_pinctrl_probe,
168 .driver = {
169 .name = "starfive-jh7110-aon-pinctrl",
170 .of_match_table = jh7110_aon_pinctrl_of_match,
171 .pm = pm_sleep_ptr(&jh7110_pinctrl_pm_ops),
172 },
173 };
174 module_platform_driver(jh7110_aon_pinctrl_driver);
175
176 MODULE_DESCRIPTION("Pinctrl driver for the StarFive JH7110 SoC aon controller");
177 MODULE_AUTHOR("Jianlong Huang <jianlong.huang@starfivetech.com>");
178 MODULE_LICENSE("GPL");
179