1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
2 /*
3  * Microsemi SoCs pinctrl driver
4  *
5  * Author: <alexandre.belloni@free-electrons.com>
6  * Author: <gregory.clement@bootlin.com>
7  * License: Dual MIT/GPL
8  * Copyright (c) 2017 Microsemi Corporation
9  */
10 
11 #include <asm/gpio.h>
12 #include <asm/system.h>
13 #include <common.h>
14 #include <config.h>
15 #include <dm.h>
16 #include <dm/device-internal.h>
17 #include <dm/lists.h>
18 #include <dm/pinctrl.h>
19 #include <dm/root.h>
20 #include <errno.h>
21 #include <fdtdec.h>
22 #include <linux/io.h>
23 #include "mscc-common.h"
24 
25 enum {
26 	FUNC_NONE,
27 	FUNC_GPIO,
28 	FUNC_IRQ0_IN,
29 	FUNC_IRQ0_OUT,
30 	FUNC_IRQ1_IN,
31 	FUNC_IRQ1_OUT,
32 	FUNC_MIIM1,
33 	FUNC_PCI_WAKE,
34 	FUNC_PTP0,
35 	FUNC_PTP1,
36 	FUNC_PTP2,
37 	FUNC_PTP3,
38 	FUNC_PWM,
39 	FUNC_RECO_CLK0,
40 	FUNC_RECO_CLK1,
41 	FUNC_SFP0,
42 	FUNC_SFP1,
43 	FUNC_SFP2,
44 	FUNC_SFP3,
45 	FUNC_SFP4,
46 	FUNC_SFP5,
47 	FUNC_SG0,
48 	FUNC_SI,
49 	FUNC_TACHO,
50 	FUNC_TWI,
51 	FUNC_TWI_SCL_M,
52 	FUNC_UART,
53 	FUNC_UART2,
54 	FUNC_MAX
55 };
56 
57 static char * const ocelot_function_names[] = {
58 	[FUNC_NONE]		= "none",
59 	[FUNC_GPIO]		= "gpio",
60 	[FUNC_IRQ0_IN]		= "irq0_in",
61 	[FUNC_IRQ0_OUT]		= "irq0_out",
62 	[FUNC_IRQ1_IN]		= "irq1_in",
63 	[FUNC_IRQ1_OUT]		= "irq1_out",
64 	[FUNC_MIIM1]		= "miim1",
65 	[FUNC_PCI_WAKE]		= "pci_wake",
66 	[FUNC_PTP0]		= "ptp0",
67 	[FUNC_PTP1]		= "ptp1",
68 	[FUNC_PTP2]		= "ptp2",
69 	[FUNC_PTP3]		= "ptp3",
70 	[FUNC_PWM]		= "pwm",
71 	[FUNC_RECO_CLK0]	= "reco_clk0",
72 	[FUNC_RECO_CLK1]	= "reco_clk1",
73 	[FUNC_SFP0]		= "sfp0",
74 	[FUNC_SFP1]		= "sfp1",
75 	[FUNC_SFP2]		= "sfp2",
76 	[FUNC_SFP3]		= "sfp3",
77 	[FUNC_SFP4]		= "sfp4",
78 	[FUNC_SFP5]		= "sfp5",
79 	[FUNC_SG0]		= "sg0",
80 	[FUNC_SI]		= "si",
81 	[FUNC_TACHO]		= "tacho",
82 	[FUNC_TWI]		= "twi",
83 	[FUNC_TWI_SCL_M]	= "twi_scl_m",
84 	[FUNC_UART]		= "uart",
85 	[FUNC_UART2]		= "uart2",
86 };
87 
88 MSCC_P(0,  SG0,       NONE,      NONE);
89 MSCC_P(1,  SG0,       NONE,      NONE);
90 MSCC_P(2,  SG0,       NONE,      NONE);
91 MSCC_P(3,  SG0,       NONE,      NONE);
92 MSCC_P(4,  IRQ0_IN,   IRQ0_OUT,  TWI);
93 MSCC_P(5,  IRQ1_IN,   IRQ1_OUT,  PCI_WAKE);
94 MSCC_P(6,  UART,      TWI_SCL_M, NONE);
95 MSCC_P(7,  UART,      TWI_SCL_M, NONE);
96 MSCC_P(8,  SI,        TWI_SCL_M, IRQ0_OUT);
97 MSCC_P(9,  SI,        TWI_SCL_M, IRQ1_OUT);
98 MSCC_P(10, PTP2,      TWI_SCL_M, SFP0);
99 MSCC_P(11, PTP3,      TWI_SCL_M, SFP1);
100 MSCC_P(12, UART2,     TWI_SCL_M, SFP2);
101 MSCC_P(13, UART2,     TWI_SCL_M, SFP3);
102 MSCC_P(14, MIIM1,     TWI_SCL_M, SFP4);
103 MSCC_P(15, MIIM1,     TWI_SCL_M, SFP5);
104 MSCC_P(16, TWI,       NONE,      SI);
105 MSCC_P(17, TWI,       TWI_SCL_M, SI);
106 MSCC_P(18, PTP0,      TWI_SCL_M, NONE);
107 MSCC_P(19, PTP1,      TWI_SCL_M, NONE);
108 MSCC_P(20, RECO_CLK0, TACHO,     NONE);
109 MSCC_P(21, RECO_CLK1, PWM,       NONE);
110 
111 #define OCELOT_PIN(n) {						\
112 	.name = "GPIO_"#n,					\
113 	.drv_data = &mscc_pin_##n				\
114 }
115 
116 static const struct mscc_pin_data ocelot_pins[] = {
117 	OCELOT_PIN(0),
118 	OCELOT_PIN(1),
119 	OCELOT_PIN(2),
120 	OCELOT_PIN(3),
121 	OCELOT_PIN(4),
122 	OCELOT_PIN(5),
123 	OCELOT_PIN(6),
124 	OCELOT_PIN(7),
125 	OCELOT_PIN(8),
126 	OCELOT_PIN(9),
127 	OCELOT_PIN(10),
128 	OCELOT_PIN(11),
129 	OCELOT_PIN(12),
130 	OCELOT_PIN(13),
131 	OCELOT_PIN(14),
132 	OCELOT_PIN(15),
133 	OCELOT_PIN(16),
134 	OCELOT_PIN(17),
135 	OCELOT_PIN(18),
136 	OCELOT_PIN(19),
137 	OCELOT_PIN(20),
138 	OCELOT_PIN(21),
139 };
140 
141 static int ocelot_gpio_probe(struct udevice *dev)
142 {
143 	struct gpio_dev_priv *uc_priv;
144 
145 	uc_priv = dev_get_uclass_priv(dev);
146 	uc_priv->bank_name = "ocelot-gpio";
147 	uc_priv->gpio_count = ARRAY_SIZE(ocelot_pins);
148 
149 	return 0;
150 }
151 
152 static struct driver ocelot_gpio_driver = {
153 	.name	= "ocelot-gpio",
154 	.id	= UCLASS_GPIO,
155 	.probe	= ocelot_gpio_probe,
156 	.ops	= &mscc_gpio_ops,
157 };
158 
159 int ocelot_pinctrl_probe(struct udevice *dev)
160 {
161 	int ret;
162 
163 	ret = mscc_pinctrl_probe(dev, FUNC_MAX, ocelot_pins,
164 				 ARRAY_SIZE(ocelot_pins),
165 				 ocelot_function_names);
166 
167 	if (ret)
168 		return ret;
169 
170 	ret = device_bind(dev, &ocelot_gpio_driver, "ocelot-gpio", NULL,
171 			  dev_of_offset(dev), NULL);
172 
173 	return ret;
174 }
175 
176 static const struct udevice_id ocelot_pinctrl_of_match[] = {
177 	{.compatible = "mscc,ocelot-pinctrl"},
178 	{},
179 };
180 
181 U_BOOT_DRIVER(ocelot_pinctrl) = {
182 	.name = "ocelot-pinctrl",
183 	.id = UCLASS_PINCTRL,
184 	.of_match = of_match_ptr(ocelot_pinctrl_of_match),
185 	.probe = ocelot_pinctrl_probe,
186 	.priv_auto_alloc_size = sizeof(struct mscc_pinctrl),
187 	.ops = &mscc_pinctrl_ops,
188 };
189