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Ian Campbellabce2c62014-06-05 19:00:15 +01001/*
2 * (C) Copyright 2012 Henrik Nordstrom <henrik@henriknordstrom.net>
3 *
4 * Based on earlier arch/arm/cpu/armv7/sunxi/gpio.c:
5 *
6 * (C) Copyright 2007-2011
7 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
8 * Tom Cubie <tangliang@allwinnertech.com>
9 *
10 * SPDX-License-Identifier: GPL-2.0+
11 */
12
13#include <common.h>
Simon Glass7aa97482014-10-30 20:25:49 -060014#include <dm.h>
15#include <errno.h>
16#include <fdtdec.h>
17#include <malloc.h>
Hans de Goede2fcf0332015-04-25 17:25:14 +020018#include <asm/arch/gpio.h>
Ian Campbellabce2c62014-06-05 19:00:15 +010019#include <asm/io.h>
20#include <asm/gpio.h>
Simon Glass7aa97482014-10-30 20:25:49 -060021#include <dm/device-internal.h>
Chen-Yu Tsai4694dc52016-07-22 16:12:59 +080022#include <dt-bindings/gpio/gpio.h>
Ian Campbellabce2c62014-06-05 19:00:15 +010023
Simon Glass7aa97482014-10-30 20:25:49 -060024DECLARE_GLOBAL_DATA_PTR;
25
26#define SUNXI_GPIOS_PER_BANK SUNXI_GPIO_A_NR
27
28struct sunxi_gpio_platdata {
29 struct sunxi_gpio *regs;
30 const char *bank_name; /* Name of bank, e.g. "B" */
31 int gpio_count;
32};
33
34#ifndef CONFIG_DM_GPIO
Ian Campbellabce2c62014-06-05 19:00:15 +010035static int sunxi_gpio_output(u32 pin, u32 val)
36{
37 u32 dat;
38 u32 bank = GPIO_BANK(pin);
39 u32 num = GPIO_NUM(pin);
40 struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
41
42 dat = readl(&pio->dat);
43 if (val)
44 dat |= 0x1 << num;
45 else
46 dat &= ~(0x1 << num);
47
48 writel(dat, &pio->dat);
49
50 return 0;
51}
52
53static int sunxi_gpio_input(u32 pin)
54{
55 u32 dat;
56 u32 bank = GPIO_BANK(pin);
57 u32 num = GPIO_NUM(pin);
58 struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
59
60 dat = readl(&pio->dat);
61 dat >>= num;
62
63 return dat & 0x1;
64}
65
66int gpio_request(unsigned gpio, const char *label)
67{
68 return 0;
69}
70
71int gpio_free(unsigned gpio)
72{
73 return 0;
74}
75
76int gpio_direction_input(unsigned gpio)
77{
78 sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_INPUT);
79
Axel Linb0c4ae12014-12-20 11:41:25 +080080 return 0;
Ian Campbellabce2c62014-06-05 19:00:15 +010081}
82
83int gpio_direction_output(unsigned gpio, int value)
84{
85 sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_OUTPUT);
86
87 return sunxi_gpio_output(gpio, value);
88}
89
90int gpio_get_value(unsigned gpio)
91{
92 return sunxi_gpio_input(gpio);
93}
94
95int gpio_set_value(unsigned gpio, int value)
96{
97 return sunxi_gpio_output(gpio, value);
98}
99
100int sunxi_name_to_gpio(const char *name)
101{
102 int group = 0;
103 int groupsize = 9 * 32;
104 long pin;
105 char *eptr;
Hans de Goede6c727e02014-12-24 19:34:38 +0100106
Ian Campbellabce2c62014-06-05 19:00:15 +0100107 if (*name == 'P' || *name == 'p')
108 name++;
109 if (*name >= 'A') {
110 group = *name - (*name > 'a' ? 'a' : 'A');
111 groupsize = 32;
112 name++;
113 }
114
115 pin = simple_strtol(name, &eptr, 10);
116 if (!*name || *eptr)
117 return -1;
118 if (pin < 0 || pin > groupsize || group >= 9)
119 return -1;
120 return group * 32 + pin;
121}
Simon Glass7aa97482014-10-30 20:25:49 -0600122#endif
123
Hans de Goede746c0872015-04-22 17:59:01 +0200124int sunxi_name_to_gpio_bank(const char *name)
125{
126 int group = 0;
127
128 if (*name == 'P' || *name == 'p')
129 name++;
130 if (*name >= 'A') {
131 group = *name - (*name > 'a' ? 'a' : 'A');
132 return group;
133 }
134
135 return -1;
136}
137
Simon Glass7aa97482014-10-30 20:25:49 -0600138#ifdef CONFIG_DM_GPIO
Simon Glassa5ab8832015-04-18 11:33:43 -0600139/* TODO(sjg@chromium.org): Remove this function and use device tree */
140int sunxi_name_to_gpio(const char *name)
141{
142 unsigned int gpio;
143 int ret;
Hans de Goedef9b7a042015-04-22 11:31:22 +0200144#if !defined CONFIG_SPL_BUILD && defined CONFIG_AXP_GPIO
145 char lookup[8];
Simon Glassa5ab8832015-04-18 11:33:43 -0600146
Hans de Goedef9b7a042015-04-22 11:31:22 +0200147 if (strcasecmp(name, "AXP0-VBUS-DETECT") == 0) {
148 sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
149 SUNXI_GPIO_AXP0_VBUS_DETECT);
150 name = lookup;
151 } else if (strcasecmp(name, "AXP0-VBUS-ENABLE") == 0) {
152 sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
153 SUNXI_GPIO_AXP0_VBUS_ENABLE);
154 name = lookup;
155 }
156#endif
Simon Glassa5ab8832015-04-18 11:33:43 -0600157 ret = gpio_lookup_name(name, NULL, NULL, &gpio);
158
159 return ret ? ret : gpio;
160}
161
Simon Glass7aa97482014-10-30 20:25:49 -0600162static int sunxi_gpio_direction_input(struct udevice *dev, unsigned offset)
163{
164 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
165
166 sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_INPUT);
167
168 return 0;
169}
170
171static int sunxi_gpio_direction_output(struct udevice *dev, unsigned offset,
172 int value)
173{
174 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
175 u32 num = GPIO_NUM(offset);
176
177 sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_OUTPUT);
178 clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0);
179
180 return 0;
181}
182
183static int sunxi_gpio_get_value(struct udevice *dev, unsigned offset)
184{
185 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
186 u32 num = GPIO_NUM(offset);
187 unsigned dat;
188
189 dat = readl(&plat->regs->dat);
190 dat >>= num;
191
192 return dat & 0x1;
193}
194
195static int sunxi_gpio_set_value(struct udevice *dev, unsigned offset,
196 int value)
197{
198 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
199 u32 num = GPIO_NUM(offset);
200
201 clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0);
202 return 0;
203}
204
205static int sunxi_gpio_get_function(struct udevice *dev, unsigned offset)
206{
207 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
208 int func;
209
210 func = sunxi_gpio_get_cfgbank(plat->regs, offset);
211 if (func == SUNXI_GPIO_OUTPUT)
212 return GPIOF_OUTPUT;
213 else if (func == SUNXI_GPIO_INPUT)
214 return GPIOF_INPUT;
215 else
216 return GPIOF_FUNC;
217}
218
Chen-Yu Tsai4694dc52016-07-22 16:12:59 +0800219static int sunxi_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
220 struct fdtdec_phandle_args *args)
221{
222 int ret;
223
224 ret = device_get_child(dev, args->args[0], &desc->dev);
225 if (ret)
226 return ret;
227 desc->offset = args->args[1];
228 desc->flags = args->args[2] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0;
229
230 return 0;
231}
232
Simon Glass7aa97482014-10-30 20:25:49 -0600233static const struct dm_gpio_ops gpio_sunxi_ops = {
234 .direction_input = sunxi_gpio_direction_input,
235 .direction_output = sunxi_gpio_direction_output,
236 .get_value = sunxi_gpio_get_value,
237 .set_value = sunxi_gpio_set_value,
238 .get_function = sunxi_gpio_get_function,
Chen-Yu Tsai4694dc52016-07-22 16:12:59 +0800239 .xlate = sunxi_gpio_xlate,
Simon Glass7aa97482014-10-30 20:25:49 -0600240};
241
242/**
243 * Returns the name of a GPIO bank
244 *
245 * GPIO banks are named A, B, C, ...
246 *
247 * @bank: Bank number (0, 1..n-1)
248 * @return allocated string containing the name
249 */
250static char *gpio_bank_name(int bank)
251{
252 char *name;
253
Simon Glass07ce60f2015-04-18 11:33:44 -0600254 name = malloc(3);
Simon Glass7aa97482014-10-30 20:25:49 -0600255 if (name) {
Simon Glass07ce60f2015-04-18 11:33:44 -0600256 name[0] = 'P';
257 name[1] = 'A' + bank;
258 name[2] = '\0';
Simon Glass7aa97482014-10-30 20:25:49 -0600259 }
260
261 return name;
262}
263
264static int gpio_sunxi_probe(struct udevice *dev)
265{
266 struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
Simon Glasse564f052015-03-05 12:25:20 -0700267 struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
Simon Glass7aa97482014-10-30 20:25:49 -0600268
269 /* Tell the uclass how many GPIOs we have */
270 if (plat) {
271 uc_priv->gpio_count = plat->gpio_count;
272 uc_priv->bank_name = plat->bank_name;
273 }
274
275 return 0;
276}
Stephen Warren6f82fac2016-05-11 15:26:25 -0600277
278struct sunxi_gpio_soc_data {
279 int start;
280 int no_banks;
281};
282
Simon Glass7aa97482014-10-30 20:25:49 -0600283/**
284 * We have a top-level GPIO device with no actual GPIOs. It has a child
285 * device for each Sunxi bank.
286 */
287static int gpio_sunxi_bind(struct udevice *parent)
288{
Stephen Warren6f82fac2016-05-11 15:26:25 -0600289 struct sunxi_gpio_soc_data *soc_data =
290 (struct sunxi_gpio_soc_data *)dev_get_driver_data(parent);
Simon Glass7aa97482014-10-30 20:25:49 -0600291 struct sunxi_gpio_platdata *plat = parent->platdata;
292 struct sunxi_gpio_reg *ctlr;
Stephen Warren6f82fac2016-05-11 15:26:25 -0600293 int bank, ret;
Simon Glass7aa97482014-10-30 20:25:49 -0600294
295 /* If this is a child device, there is nothing to do here */
296 if (plat)
297 return 0;
298
Simon Glass4e9838c2015-08-11 08:33:29 -0600299 ctlr = (struct sunxi_gpio_reg *)dev_get_addr(parent);
Stephen Warren6f82fac2016-05-11 15:26:25 -0600300 for (bank = 0; bank < soc_data->no_banks; bank++) {
Simon Glass7aa97482014-10-30 20:25:49 -0600301 struct sunxi_gpio_platdata *plat;
302 struct udevice *dev;
303
304 plat = calloc(1, sizeof(*plat));
305 if (!plat)
306 return -ENOMEM;
307 plat->regs = &ctlr->gpio_bank[bank];
Stephen Warren6f82fac2016-05-11 15:26:25 -0600308 plat->bank_name = gpio_bank_name(soc_data->start + bank);
Simon Glass7aa97482014-10-30 20:25:49 -0600309 plat->gpio_count = SUNXI_GPIOS_PER_BANK;
310
311 ret = device_bind(parent, parent->driver,
312 plat->bank_name, plat, -1, &dev);
313 if (ret)
314 return ret;
Simon Glasse160f7d2017-01-17 16:52:55 -0700315 dev_set_of_offset(dev, dev_of_offset(parent));
Simon Glass7aa97482014-10-30 20:25:49 -0600316 }
317
318 return 0;
319}
320
Stephen Warren6f82fac2016-05-11 15:26:25 -0600321static const struct sunxi_gpio_soc_data soc_data_a_all = {
322 .start = 0,
323 .no_banks = SUNXI_GPIO_BANKS,
324};
325
326static const struct sunxi_gpio_soc_data soc_data_l_1 = {
327 .start = 'L' - 'A',
328 .no_banks = 1,
329};
330
331static const struct sunxi_gpio_soc_data soc_data_l_2 = {
332 .start = 'L' - 'A',
333 .no_banks = 2,
334};
335
336static const struct sunxi_gpio_soc_data soc_data_l_3 = {
337 .start = 'L' - 'A',
338 .no_banks = 3,
339};
340
341#define ID(_compat_, _soc_data_) \
342 { .compatible = _compat_, .data = (ulong)&soc_data_##_soc_data_ }
343
Simon Glass7aa97482014-10-30 20:25:49 -0600344static const struct udevice_id sunxi_gpio_ids[] = {
Stephen Warren6f82fac2016-05-11 15:26:25 -0600345 ID("allwinner,sun4i-a10-pinctrl", a_all),
346 ID("allwinner,sun5i-a10s-pinctrl", a_all),
347 ID("allwinner,sun5i-a13-pinctrl", a_all),
348 ID("allwinner,sun6i-a31-pinctrl", a_all),
349 ID("allwinner,sun6i-a31s-pinctrl", a_all),
350 ID("allwinner,sun7i-a20-pinctrl", a_all),
351 ID("allwinner,sun8i-a23-pinctrl", a_all),
352 ID("allwinner,sun8i-a33-pinctrl", a_all),
353 ID("allwinner,sun8i-a83t-pinctrl", a_all),
354 ID("allwinner,sun8i-h3-pinctrl", a_all),
355 ID("allwinner,sun9i-a80-pinctrl", a_all),
356 ID("allwinner,sun6i-a31-r-pinctrl", l_2),
357 ID("allwinner,sun8i-a23-r-pinctrl", l_1),
358 ID("allwinner,sun8i-a83t-r-pinctrl", l_1),
359 ID("allwinner,sun8i-h3-r-pinctrl", l_1),
360 ID("allwinner,sun9i-a80-r-pinctrl", l_3),
Simon Glass7aa97482014-10-30 20:25:49 -0600361 { }
362};
363
364U_BOOT_DRIVER(gpio_sunxi) = {
365 .name = "gpio_sunxi",
366 .id = UCLASS_GPIO,
367 .ops = &gpio_sunxi_ops,
368 .of_match = sunxi_gpio_ids,
369 .bind = gpio_sunxi_bind,
370 .probe = gpio_sunxi_probe,
371};
372#endif