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5dc626f8 MY |
1 | /* |
2 | * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com> | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0+ | |
5 | */ | |
6 | ||
7 | #include <common.h> | |
8 | #include <mapmem.h> | |
9 | #include <linux/io.h> | |
10 | #include <linux/err.h> | |
11 | #include <dm/device.h> | |
12 | #include <dm/pinctrl.h> | |
13 | ||
14 | #include "pinctrl-uniphier.h" | |
15 | ||
16 | DECLARE_GLOBAL_DATA_PTR; | |
17 | ||
18 | static int uniphier_pinctrl_get_groups_count(struct udevice *dev) | |
19 | { | |
20 | struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); | |
21 | ||
22 | return priv->socdata->groups_count; | |
23 | } | |
24 | ||
25 | static const char *uniphier_pinctrl_get_group_name(struct udevice *dev, | |
26 | unsigned selector) | |
27 | { | |
28 | struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); | |
29 | ||
30 | return priv->socdata->groups[selector].name; | |
31 | } | |
32 | ||
33 | static int uniphier_pinmux_get_functions_count(struct udevice *dev) | |
34 | { | |
35 | struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); | |
36 | ||
37 | return priv->socdata->functions_count; | |
38 | } | |
39 | ||
40 | static const char *uniphier_pinmux_get_function_name(struct udevice *dev, | |
41 | unsigned selector) | |
42 | { | |
43 | struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); | |
44 | ||
45 | return priv->socdata->functions[selector]; | |
46 | } | |
47 | ||
48 | static void uniphier_pinconf_input_enable(struct udevice *dev, unsigned pin) | |
49 | { | |
50 | struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); | |
51 | int pins_count = priv->socdata->pins_count; | |
52 | const struct uniphier_pinctrl_pin *pins = priv->socdata->pins; | |
53 | int i; | |
54 | ||
55 | for (i = 0; i < pins_count; i++) { | |
56 | if (pins[i].number == pin) { | |
57 | unsigned int iectrl; | |
58 | u32 tmp; | |
59 | ||
60 | iectrl = uniphier_pin_get_iectrl(pins[i].data); | |
61 | tmp = readl(priv->base + UNIPHIER_PINCTRL_IECTRL); | |
62 | tmp |= 1 << iectrl; | |
63 | writel(tmp, priv->base + UNIPHIER_PINCTRL_IECTRL); | |
64 | } | |
65 | } | |
66 | } | |
67 | ||
68 | static void uniphier_pinmux_set_one(struct udevice *dev, unsigned pin, | |
69 | unsigned muxval) | |
70 | { | |
71 | struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); | |
72 | unsigned mux_bits = priv->socdata->mux_bits; | |
73 | unsigned reg_stride = priv->socdata->reg_stride; | |
74 | unsigned reg, reg_end, shift, mask; | |
75 | u32 tmp; | |
76 | ||
77 | reg = UNIPHIER_PINCTRL_PINMUX_BASE + pin * mux_bits / 32 * reg_stride; | |
78 | reg_end = reg + reg_stride; | |
79 | shift = pin * mux_bits % 32; | |
80 | mask = (1U << mux_bits) - 1; | |
81 | ||
82 | /* | |
83 | * If reg_stride is greater than 4, the MSB of each pinsel shall be | |
84 | * stored in the offset+4. | |
85 | */ | |
86 | for (; reg < reg_end; reg += 4) { | |
87 | tmp = readl(priv->base + reg); | |
88 | tmp &= ~(mask << shift); | |
89 | tmp |= (mask & muxval) << shift; | |
90 | writel(tmp, priv->base + reg); | |
91 | ||
92 | muxval >>= mux_bits; | |
93 | } | |
94 | ||
95 | if (priv->socdata->load_pinctrl) | |
96 | writel(1, priv->base + UNIPHIER_PINCTRL_LOAD_PINMUX); | |
97 | ||
98 | /* some pins need input-enabling */ | |
99 | uniphier_pinconf_input_enable(dev, pin); | |
100 | } | |
101 | ||
102 | static int uniphier_pinmux_group_set(struct udevice *dev, | |
103 | unsigned group_selector, | |
104 | unsigned func_selector) | |
105 | { | |
106 | struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); | |
107 | const struct uniphier_pinctrl_group *grp = | |
108 | &priv->socdata->groups[group_selector]; | |
109 | int i; | |
110 | ||
111 | for (i = 0; i < grp->num_pins; i++) | |
112 | uniphier_pinmux_set_one(dev, grp->pins[i], grp->muxvals[i]); | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
117 | const struct pinctrl_ops uniphier_pinctrl_ops = { | |
118 | .get_groups_count = uniphier_pinctrl_get_groups_count, | |
119 | .get_group_name = uniphier_pinctrl_get_group_name, | |
120 | .get_functions_count = uniphier_pinmux_get_functions_count, | |
121 | .get_function_name = uniphier_pinmux_get_function_name, | |
122 | .pinmux_group_set = uniphier_pinmux_group_set, | |
123 | .set_state = pinctrl_generic_set_state, | |
124 | }; | |
125 | ||
126 | int uniphier_pinctrl_probe(struct udevice *dev, | |
127 | struct uniphier_pinctrl_socdata *socdata) | |
128 | { | |
129 | struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); | |
130 | fdt_addr_t addr; | |
131 | fdt_size_t size; | |
132 | ||
133 | addr = fdtdec_get_addr_size(gd->fdt_blob, dev->of_offset, "reg", | |
134 | &size); | |
135 | if (addr == FDT_ADDR_T_NONE) | |
136 | return -EINVAL; | |
137 | ||
138 | priv->base = map_sysmem(addr, size); | |
139 | if (!priv->base) | |
140 | return -ENOMEM; | |
141 | ||
142 | priv->socdata = socdata; | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
147 | int uniphier_pinctrl_remove(struct udevice *dev) | |
148 | { | |
149 | struct uniphier_pinctrl_priv *priv = dev_get_priv(dev); | |
150 | ||
151 | unmap_sysmem(priv->base); | |
152 | ||
153 | return 0; | |
154 | } |