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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / a5fd13ad1913d9c66c47666dbedac7703a48e502 / . / drivers / pinctrl / ath79 / pinctrl_qca953x.c
blob: d02597e968aca76fd1edc5b1482e1030cad48ab9 [file] [log] [blame]
Wills Wangc1024532016-03-16 16:59:56 +0800[diff] [blame]1/*
2 * Copyright (C) 2015-2016 Wills Wang <wills.wang@live.com>
3 *
4 * SPDX-License-Identifier: GPL-2.0+
5 */
6
7#include <common.h>
8#include <dm.h>
9#include <errno.h>
10#include <asm/io.h>
11#include <dm/pinctrl.h>
12#include <mach/ar71xx_regs.h>
13
14DECLARE_GLOBAL_DATA_PTR;
15
16enum periph_id {
17 PERIPH_ID_UART0,
18 PERIPH_ID_SPI0,
19 PERIPH_ID_NONE = -1,
20};
21
22struct qca953x_pinctrl_priv {
23 void __iomem *regs;
24};
25
26static void pinctrl_qca953x_spi_config(struct qca953x_pinctrl_priv *priv, int cs)
27{
28 switch (cs) {
29 case 0:
30 clrsetbits_be32(priv->regs + AR71XX_GPIO_REG_OE,
31 QCA953X_GPIO(5) | QCA953X_GPIO(6) |
32 QCA953X_GPIO(7), QCA953X_GPIO(8));
33
34 clrsetbits_be32(priv->regs + QCA953X_GPIO_REG_OUT_FUNC1,
35 QCA953X_GPIO_MUX_MASK(8) |
36 QCA953X_GPIO_MUX_MASK(16) |
37 QCA953X_GPIO_MUX_MASK(24),
38 (QCA953X_GPIO_OUT_MUX_SPI_CS0 << 8) |
39 (QCA953X_GPIO_OUT_MUX_SPI_CLK << 16) |
40 (QCA953X_GPIO_OUT_MUX_SPI_MOSI << 24));
41
42 clrsetbits_be32(priv->regs + QCA953X_GPIO_REG_IN_ENABLE0,
43 QCA953X_GPIO_MUX_MASK(0),
44 QCA953X_GPIO_IN_MUX_SPI_DATA_IN);
45
46 setbits_be32(priv->regs + AR71XX_GPIO_REG_OUT,
47 QCA953X_GPIO(8));
48 break;
49 }
50}
51
52static void pinctrl_qca953x_uart_config(struct qca953x_pinctrl_priv *priv, int uart_id)
53{
54 switch (uart_id) {
55 case PERIPH_ID_UART0:
56 clrsetbits_be32(priv->regs + AR71XX_GPIO_REG_OE,
57 QCA953X_GPIO(9), QCA953X_GPIO(10));
58
59 clrsetbits_be32(priv->regs + QCA953X_GPIO_REG_OUT_FUNC2,
60 QCA953X_GPIO_MUX_MASK(16),
61 QCA953X_GPIO_OUT_MUX_UART0_SOUT << 16);
62
63 clrsetbits_be32(priv->regs + QCA953X_GPIO_REG_IN_ENABLE0,
64 QCA953X_GPIO_MUX_MASK(8),
65 QCA953X_GPIO_IN_MUX_UART0_SIN << 8);
66
67 setbits_be32(priv->regs + AR71XX_GPIO_REG_OUT,
68 QCA953X_GPIO(10));
69 break;
70 }
71}
72
73static int qca953x_pinctrl_request(struct udevice *dev, int func, int flags)
74{
75 struct qca953x_pinctrl_priv *priv = dev_get_priv(dev);
76
77 debug("%s: func=%x, flags=%x\n", __func__, func, flags);
78 switch (func) {
79 case PERIPH_ID_SPI0:
80 pinctrl_qca953x_spi_config(priv, flags);
81 break;
82 case PERIPH_ID_UART0:
83 pinctrl_qca953x_uart_config(priv, func);
84 break;
85 default:
86 return -EINVAL;
87 }
88
89 return 0;
90}
91
92static int qca953x_pinctrl_get_periph_id(struct udevice *dev,
93 struct udevice *periph)
94{
95 u32 cell[2];
96 int ret;
97
98 ret = fdtdec_get_int_array(gd->fdt_blob, periph->of_offset,
99 "interrupts", cell, ARRAY_SIZE(cell));
100 if (ret < 0)
101 return -EINVAL;
102
103 switch (cell[0]) {
104 case 128:
105 return PERIPH_ID_UART0;
106 case 129:
107 return PERIPH_ID_SPI0;
108 }
109 return -ENOENT;
110}
111
112static int qca953x_pinctrl_set_state_simple(struct udevice *dev,
113 struct udevice *periph)
114{
115 int func;
116
117 func = qca953x_pinctrl_get_periph_id(dev, periph);
118 if (func < 0)
119 return func;
120 return qca953x_pinctrl_request(dev, func, 0);
121}
122
123static struct pinctrl_ops qca953x_pinctrl_ops = {
124 .set_state_simple = qca953x_pinctrl_set_state_simple,
125 .request = qca953x_pinctrl_request,
126 .get_periph_id = qca953x_pinctrl_get_periph_id,
127};
128
129static int qca953x_pinctrl_probe(struct udevice *dev)
130{
131 struct qca953x_pinctrl_priv *priv = dev_get_priv(dev);
132 fdt_addr_t addr;
133
134 addr = dev_get_addr(dev);
135 if (addr == FDT_ADDR_T_NONE)
136 return -EINVAL;
137
138 priv->regs = map_physmem(addr,
139 AR71XX_GPIO_SIZE,
140 MAP_NOCACHE);
141 return 0;
142}
143
144static const struct udevice_id qca953x_pinctrl_ids[] = {
145 { .compatible = "qca,qca953x-pinctrl" },
146 { }
147};
148
149U_BOOT_DRIVER(pinctrl_qca953x) = {
150 .name = "pinctrl_qca953x",
151 .id = UCLASS_PINCTRL,
152 .of_match = qca953x_pinctrl_ids,
153 .priv_auto_alloc_size = sizeof(struct qca953x_pinctrl_priv),
154 .ops = &qca953x_pinctrl_ops,
155 .probe = qca953x_pinctrl_probe,
156};