1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Marvell Orion pinctrl driver based on mvebu pinctrl core
4  *
5  * Author: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
6  *
7  * The first 16 MPP pins on Orion are easy to handle: they are
8  * configured through 2 consecutive registers, located at the base
9  * address of the MPP device.
10  *
11  * However the last 4 MPP pins are handled by a register at offset
12  * 0x50 from the base address, so it is not consecutive with the first
13  * two registers.
14  */
15 
16 #include <linux/err.h>
17 #include <linux/init.h>
18 #include <linux/io.h>
19 #include <linux/platform_device.h>
20 #include <linux/clk.h>
21 #include <linux/of.h>
22 #include <linux/pinctrl/pinctrl.h>
23 #include <linux/property.h>
24 
25 #include "pinctrl-mvebu.h"
26 
27 static void __iomem *mpp_base;
28 static void __iomem *high_mpp_base;
29 
orion_mpp_ctrl_get(struct mvebu_mpp_ctrl_data * data,unsigned pid,unsigned long * config)30 static int orion_mpp_ctrl_get(struct mvebu_mpp_ctrl_data *data,
31 			      unsigned pid, unsigned long *config)
32 {
33 	unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
34 
35 	if (pid < 16) {
36 		unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
37 		*config = (readl(mpp_base + off) >> shift) & MVEBU_MPP_MASK;
38 	}
39 	else {
40 		*config = (readl(high_mpp_base) >> shift) & MVEBU_MPP_MASK;
41 	}
42 
43 	return 0;
44 }
45 
orion_mpp_ctrl_set(struct mvebu_mpp_ctrl_data * data,unsigned pid,unsigned long config)46 static int orion_mpp_ctrl_set(struct mvebu_mpp_ctrl_data *data,
47 			      unsigned pid, unsigned long config)
48 {
49 	unsigned shift = (pid % MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
50 
51 	if (pid < 16) {
52 		unsigned off = (pid / MVEBU_MPPS_PER_REG) * MVEBU_MPP_BITS;
53 		u32 reg = readl(mpp_base + off) & ~(MVEBU_MPP_MASK << shift);
54 		writel(reg | (config << shift), mpp_base + off);
55 	}
56 	else {
57 		u32 reg = readl(high_mpp_base) & ~(MVEBU_MPP_MASK << shift);
58 		writel(reg | (config << shift), high_mpp_base);
59 	}
60 
61 	return 0;
62 }
63 
64 #define V(f5181, f5182, f5281) \
65 	((f5181 << 0) | (f5182 << 1) | (f5281 << 2))
66 
67 enum orion_variant {
68 	V_5181  = V(1, 0, 0),
69 	V_5182  = V(0, 1, 0),
70 	V_5281  = V(0, 0, 1),
71 	V_ALL   = V(1, 1, 1),
72 };
73 
74 static struct mvebu_mpp_mode orion_mpp_modes[] = {
75 	MPP_MODE(0,
76 		 MPP_VAR_FUNCTION(0x0, "pcie", "rstout",    V_ALL),
77 		 MPP_VAR_FUNCTION(0x2, "pci", "req2",       V_ALL),
78 		 MPP_VAR_FUNCTION(0x3, "gpio", NULL,        V_ALL)),
79 	MPP_MODE(1,
80 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
81 		 MPP_VAR_FUNCTION(0x2, "pci", "gnt2",       V_ALL)),
82 	MPP_MODE(2,
83 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
84 		 MPP_VAR_FUNCTION(0x2, "pci", "req3",       V_ALL),
85 		 MPP_VAR_FUNCTION(0x3, "pci-1", "pme",      V_ALL)),
86 	MPP_MODE(3,
87 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
88 		 MPP_VAR_FUNCTION(0x2, "pci", "gnt3",       V_ALL)),
89 	MPP_MODE(4,
90 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
91 		 MPP_VAR_FUNCTION(0x2, "pci", "req4",       V_ALL),
92 		 MPP_VAR_FUNCTION(0x4, "bootnand", "re",    V_5182 | V_5281),
93 		 MPP_VAR_FUNCTION(0x5, "sata0", "prsnt",    V_5182)),
94 	MPP_MODE(5,
95 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
96 		 MPP_VAR_FUNCTION(0x2, "pci", "gnt4",       V_ALL),
97 		 MPP_VAR_FUNCTION(0x4, "bootnand", "we",    V_5182 | V_5281),
98 		 MPP_VAR_FUNCTION(0x5, "sata1", "prsnt",    V_5182)),
99 	MPP_MODE(6,
100 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
101 		 MPP_VAR_FUNCTION(0x2, "pci", "req5",       V_ALL),
102 		 MPP_VAR_FUNCTION(0x4, "nand", "re0",       V_5182 | V_5281),
103 		 MPP_VAR_FUNCTION(0x5, "pci-1", "clk",      V_5181),
104 		 MPP_VAR_FUNCTION(0x5, "sata0", "act",      V_5182)),
105 	MPP_MODE(7,
106 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
107 		 MPP_VAR_FUNCTION(0x2, "pci", "gnt5",       V_ALL),
108 		 MPP_VAR_FUNCTION(0x4, "nand", "we0",       V_5182 | V_5281),
109 		 MPP_VAR_FUNCTION(0x5, "pci-1", "clk",      V_5181),
110 		 MPP_VAR_FUNCTION(0x5, "sata1", "act",      V_5182)),
111 	MPP_MODE(8,
112 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
113 		 MPP_VAR_FUNCTION(0x1, "ge", "col",         V_ALL)),
114 	MPP_MODE(9,
115 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
116 		 MPP_VAR_FUNCTION(0x1, "ge", "rxerr",       V_ALL)),
117 	MPP_MODE(10,
118 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
119 		 MPP_VAR_FUNCTION(0x1, "ge", "crs",         V_ALL)),
120 	MPP_MODE(11,
121 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
122 		 MPP_VAR_FUNCTION(0x1, "ge", "txerr",       V_ALL)),
123 	MPP_MODE(12,
124 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
125 		 MPP_VAR_FUNCTION(0x1, "ge", "txd4",        V_ALL),
126 		 MPP_VAR_FUNCTION(0x4, "nand", "re1",       V_5182 | V_5281),
127 		 MPP_VAR_FUNCTION(0x5, "sata0", "ledprsnt", V_5182)),
128 	MPP_MODE(13,
129 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
130 		 MPP_VAR_FUNCTION(0x1, "ge", "txd5",        V_ALL),
131 		 MPP_VAR_FUNCTION(0x4, "nand", "we1",       V_5182 | V_5281),
132 		 MPP_VAR_FUNCTION(0x5, "sata1", "ledprsnt", V_5182)),
133 	MPP_MODE(14,
134 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
135 		 MPP_VAR_FUNCTION(0x1, "ge", "txd6",        V_ALL),
136 		 MPP_VAR_FUNCTION(0x4, "nand", "re2",       V_5182 | V_5281),
137 		 MPP_VAR_FUNCTION(0x5, "sata0", "ledact",   V_5182)),
138 	MPP_MODE(15,
139 		 MPP_VAR_FUNCTION(0x0, "gpio", NULL,        V_ALL),
140 		 MPP_VAR_FUNCTION(0x1, "ge", "txd7",        V_ALL),
141 		 MPP_VAR_FUNCTION(0x4, "nand", "we2",       V_5182 | V_5281),
142 		 MPP_VAR_FUNCTION(0x5, "sata1", "ledact",   V_5182)),
143 	MPP_MODE(16,
144 		 MPP_VAR_FUNCTION(0x0, "uart1", "rxd",      V_5182 | V_5281),
145 		 MPP_VAR_FUNCTION(0x1, "ge", "rxd4",        V_ALL),
146 		 MPP_VAR_FUNCTION(0x5, "gpio", NULL,        V_5182)),
147 	MPP_MODE(17,
148 		 MPP_VAR_FUNCTION(0x0, "uart1", "txd",      V_5182 | V_5281),
149 		 MPP_VAR_FUNCTION(0x1, "ge", "rxd5",        V_ALL),
150 		 MPP_VAR_FUNCTION(0x5, "gpio", NULL,        V_5182)),
151 	MPP_MODE(18,
152 		 MPP_VAR_FUNCTION(0x0, "uart1", "cts",      V_5182 | V_5281),
153 		 MPP_VAR_FUNCTION(0x1, "ge", "rxd6",        V_ALL),
154 		 MPP_VAR_FUNCTION(0x5, "gpio", NULL,        V_5182)),
155 	MPP_MODE(19,
156 		 MPP_VAR_FUNCTION(0x0, "uart1", "rts",      V_5182 | V_5281),
157 		 MPP_VAR_FUNCTION(0x1, "ge", "rxd7",        V_ALL),
158 		 MPP_VAR_FUNCTION(0x5, "gpio", NULL,        V_5182)),
159 };
160 
161 static const struct mvebu_mpp_ctrl orion_mpp_controls[] = {
162 	MPP_FUNC_CTRL(0, 19, NULL, orion_mpp_ctrl),
163 };
164 
165 static struct pinctrl_gpio_range mv88f5181_gpio_ranges[] = {
166 	MPP_GPIO_RANGE(0, 0, 0, 16),
167 };
168 
169 static struct pinctrl_gpio_range mv88f5182_gpio_ranges[] = {
170 	MPP_GPIO_RANGE(0, 0, 0, 19),
171 };
172 
173 static struct pinctrl_gpio_range mv88f5281_gpio_ranges[] = {
174 	MPP_GPIO_RANGE(0, 0, 0, 16),
175 };
176 
177 static struct mvebu_pinctrl_soc_info mv88f5181_info = {
178 	.variant = V_5181,
179 	.controls = orion_mpp_controls,
180 	.ncontrols = ARRAY_SIZE(orion_mpp_controls),
181 	.modes = orion_mpp_modes,
182 	.nmodes = ARRAY_SIZE(orion_mpp_modes),
183 	.gpioranges = mv88f5181_gpio_ranges,
184 	.ngpioranges = ARRAY_SIZE(mv88f5181_gpio_ranges),
185 };
186 
187 static struct mvebu_pinctrl_soc_info mv88f5182_info = {
188 	.variant = V_5182,
189 	.controls = orion_mpp_controls,
190 	.ncontrols = ARRAY_SIZE(orion_mpp_controls),
191 	.modes = orion_mpp_modes,
192 	.nmodes = ARRAY_SIZE(orion_mpp_modes),
193 	.gpioranges = mv88f5182_gpio_ranges,
194 	.ngpioranges = ARRAY_SIZE(mv88f5182_gpio_ranges),
195 };
196 
197 static struct mvebu_pinctrl_soc_info mv88f5281_info = {
198 	.variant = V_5281,
199 	.controls = orion_mpp_controls,
200 	.ncontrols = ARRAY_SIZE(orion_mpp_controls),
201 	.modes = orion_mpp_modes,
202 	.nmodes = ARRAY_SIZE(orion_mpp_modes),
203 	.gpioranges = mv88f5281_gpio_ranges,
204 	.ngpioranges = ARRAY_SIZE(mv88f5281_gpio_ranges),
205 };
206 
207 /*
208  * There are multiple variants of the Orion SoCs, but in terms of pin
209  * muxing, they are identical.
210  */
211 static const struct of_device_id orion_pinctrl_of_match[] = {
212 	{ .compatible = "marvell,88f5181-pinctrl", .data = &mv88f5181_info },
213 	{ .compatible = "marvell,88f5181l-pinctrl", .data = &mv88f5181_info },
214 	{ .compatible = "marvell,88f5182-pinctrl", .data = &mv88f5182_info },
215 	{ .compatible = "marvell,88f5281-pinctrl", .data = &mv88f5281_info },
216 	{ }
217 };
218 
orion_pinctrl_probe(struct platform_device * pdev)219 static int orion_pinctrl_probe(struct platform_device *pdev)
220 {
221 	pdev->dev.platform_data = (void*)device_get_match_data(&pdev->dev);
222 
223 	mpp_base = devm_platform_ioremap_resource(pdev, 0);
224 	if (IS_ERR(mpp_base))
225 		return PTR_ERR(mpp_base);
226 
227 	high_mpp_base = devm_platform_ioremap_resource(pdev, 1);
228 	if (IS_ERR(high_mpp_base))
229 		return PTR_ERR(high_mpp_base);
230 
231 	return mvebu_pinctrl_probe(pdev);
232 }
233 
234 static struct platform_driver orion_pinctrl_driver = {
235 	.driver = {
236 		.name = "orion-pinctrl",
237 		.of_match_table = of_match_ptr(orion_pinctrl_of_match),
238 	},
239 	.probe = orion_pinctrl_probe,
240 };
241 builtin_platform_driver(orion_pinctrl_driver);
242