1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018 Rafał Miłecki <rafal@milecki.pl>
*/
#include <linux/err.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/slab.h>
#include "../core.h"
#include "../pinmux.h"
#define FLAG_BCM4708 BIT(1)
#define FLAG_BCM4709 BIT(2)
#define FLAG_BCM53012 BIT(3)
struct ns_pinctrl {
struct device *dev;
unsigned int chipset_flag;
struct pinctrl_dev *pctldev;
void __iomem *base;
struct pinctrl_desc pctldesc;
};
/*
* Pins
*/
static const struct pinctrl_pin_desc ns_pinctrl_pins[] = {
{ 0, "spi_clk", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 1, "spi_ss", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 2, "spi_mosi", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 3, "spi_miso", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 4, "i2c_scl", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 5, "i2c_sda", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 6, "mdc", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
{ 7, "mdio", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
{ 8, "pwm0", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 9, "pwm1", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 10, "pwm2", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 11, "pwm3", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 12, "uart1_rx", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 13, "uart1_tx", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 14, "uart1_cts", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 15, "uart1_rts", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },
{ 16, "uart2_rx", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
{ 17, "uart2_tx", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
/* TODO { ??, "xtal_out", (void *)(FLAG_BCM4709) }, */
{ 22, "sdio_pwr", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
{ 23, "sdio_en_1p8v", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },
};
/*
* Groups
*/
struct ns_pinctrl_group {
const char *name;
unsigned int *pins;
const unsigned int num_pins;
unsigned int chipsets;
};
static unsigned int spi_pins[] = { 0, 1, 2, 3 };
static unsigned int i2c_pins[] = { 4, 5 };
static unsigned int mdio_pins[] = { 6, 7 };
static unsigned int pwm0_pins[] = { 8 };
static unsigned int pwm1_pins[] = { 9 };
static unsigned int pwm2_pins[] = { 10 };
static unsigned int pwm3_pins[] = { 11 };
static unsigned int uart1_pins[] = { 12, 13, 14, 15 };
static unsigned int uart2_pins[] = { 16, 17 };
static unsigned int sdio_pwr_pins[] = { 22 };
static unsigned int sdio_1p8v_pins[] = { 23 };
#define NS_GROUP(_name, _pins, _chipsets) \
{ \
.name = _name, \
.pins = _pins, \
.num_pins = ARRAY_SIZE(_pins), \
.chipsets = _chipsets, \
}
static const struct ns_pinctrl_group ns_pinctrl_groups[] = {
NS_GROUP("spi_grp", spi_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("i2c_grp", i2c_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("mdio_grp", mdio_pins, FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("pwm0_grp", pwm0_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("pwm1_grp", pwm1_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("pwm2_grp", pwm2_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("pwm3_grp", pwm3_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("uart1_grp", uart1_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("uart2_grp", uart2_pins, FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("sdio_pwr_grp", sdio_pwr_pins, FLAG_BCM4709 | FLAG_BCM53012),
NS_GROUP("sdio_1p8v_grp", sdio_1p8v_pins, FLAG_BCM4709 | FLAG_BCM53012),
};
/*
* Functions
*/
struct ns_pinctrl_function {
const char *name;
const char * const *groups;
const unsigned int num_groups;
unsigned int chipsets;
};
static const char * const spi_groups[] = { "spi_grp" };
static const char * const i2c_groups[] = { "i2c_grp" };
static const char * const mdio_groups[] = { "mdio_grp" };
static const char * const pwm_groups[] = { "pwm0_grp", "pwm1_grp", "pwm2_grp",
"pwm3_grp" };
static const char * const uart1_groups[] = { "uart1_grp" };
static const char * const uart2_groups[] = { "uart2_grp" };
static const char * const sdio_groups[] = { "sdio_pwr_grp", "sdio_1p8v_grp" };
#define NS_FUNCTION(_name, _groups, _chipsets) \
{ \
.name = _name, \
.groups = _groups, \
.num_groups = ARRAY_SIZE(_groups), \
.chipsets = _chipsets, \
}
static const struct ns_pinctrl_function ns_pinctrl_functions[] = {
NS_FUNCTION("spi", spi_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_FUNCTION("i2c", i2c_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_FUNCTION("mdio", mdio_groups, FLAG_BCM4709 | FLAG_BCM53012),
NS_FUNCTION("pwm", pwm_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_FUNCTION("uart1", uart1_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),
NS_FUNCTION("uart2", uart2_groups, FLAG_BCM4709 | FLAG_BCM53012),
NS_FUNCTION("sdio", sdio_groups, FLAG_BCM4709 | FLAG_BCM53012),
};
/*
* Groups code
*/
static const struct pinctrl_ops ns_pinctrl_ops = {
.get_groups_count = pinctrl_generic_get_group_count,
.get_group_name = pinctrl_generic_get_group_name,
.get_group_pins = pinctrl_generic_get_group_pins,
.dt_node_to_map = pinconf_generic_dt_node_to_map_group,
.dt_free_map = pinconf_generic_dt_free_map,
};
/*
* Functions code
*/
static int ns_pinctrl_set_mux(struct pinctrl_dev *pctrl_dev,
unsigned int func_select,
unsigned int group_selector)
{
struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
struct group_desc *group;
u32 unset = 0;
u32 tmp;
int i;
group = pinctrl_generic_get_group(pctrl_dev, group_selector);
if (!group)
return -EINVAL;
for (i = 0; i < group->num_pins; i++)
unset |= BIT(group->pins[i]);
tmp = readl(ns_pinctrl->base);
tmp &= ~unset;
writel(tmp, ns_pinctrl->base);
return 0;
}
static const struct pinmux_ops ns_pinctrl_pmxops = {
.get_functions_count = pinmux_generic_get_function_count,
.get_function_name = pinmux_generic_get_function_name,
.get_function_groups = pinmux_generic_get_function_groups,
.set_mux = ns_pinctrl_set_mux,
};
/*
* Controller code
*/
static struct pinctrl_desc ns_pinctrl_desc = {
.name = "pinctrl-ns",
.pctlops = &ns_pinctrl_ops,
.pmxops = &ns_pinctrl_pmxops,
};
static const struct of_device_id ns_pinctrl_of_match_table[] = {
{ .compatible = "brcm,bcm4708-pinmux", .data = (void *)FLAG_BCM4708, },
{ .compatible = "brcm,bcm4709-pinmux", .data = (void *)FLAG_BCM4709, },
{ .compatible = "brcm,bcm53012-pinmux", .data = (void *)FLAG_BCM53012, },
{ }
};
static int ns_pinctrl_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct ns_pinctrl *ns_pinctrl;
struct pinctrl_desc *pctldesc;
struct pinctrl_pin_desc *pin;
struct resource *res;
int i;
ns_pinctrl = devm_kzalloc(dev, sizeof(*ns_pinctrl), GFP_KERNEL);
if (!ns_pinctrl)
return -ENOMEM;
pctldesc = &ns_pinctrl->pctldesc;
platform_set_drvdata(pdev, ns_pinctrl);
/* Set basic properties */
ns_pinctrl->dev = dev;
ns_pinctrl->chipset_flag = (uintptr_t)device_get_match_data(dev);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"cru_gpio_control");
ns_pinctrl->base = devm_ioremap_resource(dev, res);
if (IS_ERR(ns_pinctrl->base))
return PTR_ERR(ns_pinctrl->base);
memcpy(pctldesc, &ns_pinctrl_desc, sizeof(*pctldesc));
/* Set pinctrl properties */
pctldesc->pins = devm_kcalloc(dev, ARRAY_SIZE(ns_pinctrl_pins),
sizeof(struct pinctrl_pin_desc),
GFP_KERNEL);
if (!pctldesc->pins)
return -ENOMEM;
for (i = 0, pin = (struct pinctrl_pin_desc *)&pctldesc->pins[0];
i < ARRAY_SIZE(ns_pinctrl_pins); i++) {
const struct pinctrl_pin_desc *src = &ns_pinctrl_pins[i];
unsigned int chipsets = (uintptr_t)src->drv_data;
if (chipsets & ns_pinctrl->chipset_flag) {
memcpy(pin++, src, sizeof(*src));
pctldesc->npins++;
}
}
/* Register */
ns_pinctrl->pctldev = devm_pinctrl_register(dev, pctldesc, ns_pinctrl);
if (IS_ERR(ns_pinctrl->pctldev)) {
dev_err(dev, "Failed to register pinctrl\n");
return PTR_ERR(ns_pinctrl->pctldev);
}
for (i = 0; i < ARRAY_SIZE(ns_pinctrl_groups); i++) {
const struct ns_pinctrl_group *group = &ns_pinctrl_groups[i];
if (!(group->chipsets & ns_pinctrl->chipset_flag))
continue;
pinctrl_generic_add_group(ns_pinctrl->pctldev, group->name,
group->pins, group->num_pins, NULL);
}
for (i = 0; i < ARRAY_SIZE(ns_pinctrl_functions); i++) {
const struct ns_pinctrl_function *function = &ns_pinctrl_functions[i];
if (!(function->chipsets & ns_pinctrl->chipset_flag))
continue;
pinmux_generic_add_function(ns_pinctrl->pctldev, function->name,
function->groups,
function->num_groups, NULL);
}
return 0;
}
static struct platform_driver ns_pinctrl_driver = {
.probe = ns_pinctrl_probe,
.driver = {
.name = "ns-pinmux",
.of_match_table = ns_pinctrl_of_match_table,
},
};
module_platform_driver(ns_pinctrl_driver);
MODULE_AUTHOR("Rafał Miłecki");
MODULE_DEVICE_TABLE(of, ns_pinctrl_of_match_table);
|
