1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * TLMM driver for Qualcomm APQ8016, APQ8096
4 *
5 * (C) Copyright 2018 Ramon Fried <ramon.fried@gmail.com>
6 *
7 */
8
9 #include <common.h>
10 #include <dm.h>
11 #include <errno.h>
12 #include <asm/io.h>
13 #include <dm/pinctrl.h>
14 #include "pinctrl-snapdragon.h"
15
16 struct msm_pinctrl_priv {
17 phys_addr_t base;
18 struct msm_pinctrl_data *data;
19 };
20
21 #define GPIO_CONFIG_OFFSET(x) ((x) * 0x1000)
22 #define TLMM_GPIO_PULL_MASK GENMASK(1, 0)
23 #define TLMM_FUNC_SEL_MASK GENMASK(5, 2)
24 #define TLMM_DRV_STRENGTH_MASK GENMASK(8, 6)
25 #define TLMM_GPIO_ENABLE BIT(9)
26
27 static const struct pinconf_param msm_conf_params[] = {
28 { "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 3 },
29 { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
30 };
31
msm_get_functions_count(struct udevice * dev)32 static int msm_get_functions_count(struct udevice *dev)
33 {
34 struct msm_pinctrl_priv *priv = dev_get_priv(dev);
35
36 return priv->data->functions_count;
37 }
38
msm_get_pins_count(struct udevice * dev)39 static int msm_get_pins_count(struct udevice *dev)
40 {
41 struct msm_pinctrl_priv *priv = dev_get_priv(dev);
42
43 return priv->data->pin_count;
44 }
45
msm_get_function_name(struct udevice * dev,unsigned int selector)46 static const char *msm_get_function_name(struct udevice *dev,
47 unsigned int selector)
48 {
49 struct msm_pinctrl_priv *priv = dev_get_priv(dev);
50
51 return priv->data->get_function_name(dev, selector);
52 }
53
msm_pinctrl_probe(struct udevice * dev)54 static int msm_pinctrl_probe(struct udevice *dev)
55 {
56 struct msm_pinctrl_priv *priv = dev_get_priv(dev);
57
58 priv->base = devfdt_get_addr(dev);
59 priv->data = (struct msm_pinctrl_data *)dev->driver_data;
60
61 return priv->base == FDT_ADDR_T_NONE ? -EINVAL : 0;
62 }
63
msm_get_pin_name(struct udevice * dev,unsigned int selector)64 static const char *msm_get_pin_name(struct udevice *dev, unsigned int selector)
65 {
66 struct msm_pinctrl_priv *priv = dev_get_priv(dev);
67
68 return priv->data->get_pin_name(dev, selector);
69 }
70
msm_pinmux_set(struct udevice * dev,unsigned int pin_selector,unsigned int func_selector)71 static int msm_pinmux_set(struct udevice *dev, unsigned int pin_selector,
72 unsigned int func_selector)
73 {
74 struct msm_pinctrl_priv *priv = dev_get_priv(dev);
75
76 clrsetbits_le32(priv->base + GPIO_CONFIG_OFFSET(pin_selector),
77 TLMM_FUNC_SEL_MASK | TLMM_GPIO_ENABLE,
78 priv->data->get_function_mux(func_selector) << 2);
79 return 0;
80 }
81
msm_pinconf_set(struct udevice * dev,unsigned int pin_selector,unsigned int param,unsigned int argument)82 static int msm_pinconf_set(struct udevice *dev, unsigned int pin_selector,
83 unsigned int param, unsigned int argument)
84 {
85 struct msm_pinctrl_priv *priv = dev_get_priv(dev);
86
87 switch (param) {
88 case PIN_CONFIG_DRIVE_STRENGTH:
89 clrsetbits_le32(priv->base + GPIO_CONFIG_OFFSET(pin_selector),
90 TLMM_DRV_STRENGTH_MASK, argument << 6);
91 break;
92 case PIN_CONFIG_BIAS_DISABLE:
93 clrbits_le32(priv->base + GPIO_CONFIG_OFFSET(pin_selector),
94 TLMM_GPIO_PULL_MASK);
95 break;
96 default:
97 return 0;
98 }
99
100 return 0;
101 }
102
103 static struct pinctrl_ops msm_pinctrl_ops = {
104 .get_pins_count = msm_get_pins_count,
105 .get_pin_name = msm_get_pin_name,
106 .set_state = pinctrl_generic_set_state,
107 .pinmux_set = msm_pinmux_set,
108 .pinconf_num_params = ARRAY_SIZE(msm_conf_params),
109 .pinconf_params = msm_conf_params,
110 .pinconf_set = msm_pinconf_set,
111 .get_functions_count = msm_get_functions_count,
112 .get_function_name = msm_get_function_name,
113 };
114
115 static const struct udevice_id msm_pinctrl_ids[] = {
116 { .compatible = "qcom,tlmm-msm8916", .data = (ulong)&apq8016_data },
117 { .compatible = "qcom,tlmm-apq8016", .data = (ulong)&apq8016_data },
118 { }
119 };
120
121 U_BOOT_DRIVER(pinctrl_snapdraon) = {
122 .name = "pinctrl_msm",
123 .id = UCLASS_PINCTRL,
124 .of_match = msm_pinctrl_ids,
125 .priv_auto_alloc_size = sizeof(struct msm_pinctrl_priv),
126 .ops = &msm_pinctrl_ops,
127 .probe = msm_pinctrl_probe,
128 };
129