]>
Commit | Line | Data |
---|---|---|
83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
abce2c62 IC |
2 | /* |
3 | * (C) Copyright 2012 Henrik Nordstrom <henrik@henriknordstrom.net> | |
4 | * | |
5 | * Based on earlier arch/arm/cpu/armv7/sunxi/gpio.c: | |
6 | * | |
7 | * (C) Copyright 2007-2011 | |
8 | * Allwinner Technology Co., Ltd. <www.allwinnertech.com> | |
9 | * Tom Cubie <tangliang@allwinnertech.com> | |
abce2c62 IC |
10 | */ |
11 | ||
12 | #include <common.h> | |
7aa97485 SG |
13 | #include <dm.h> |
14 | #include <errno.h> | |
15 | #include <fdtdec.h> | |
16 | #include <malloc.h> | |
2fcf033d | 17 | #include <asm/arch/gpio.h> |
abce2c62 IC |
18 | #include <asm/io.h> |
19 | #include <asm/gpio.h> | |
7aa97485 | 20 | #include <dm/device-internal.h> |
4694dc56 | 21 | #include <dt-bindings/gpio/gpio.h> |
abce2c62 | 22 | |
7aa97485 SG |
23 | #define SUNXI_GPIOS_PER_BANK SUNXI_GPIO_A_NR |
24 | ||
25 | struct sunxi_gpio_platdata { | |
26 | struct sunxi_gpio *regs; | |
27 | const char *bank_name; /* Name of bank, e.g. "B" */ | |
28 | int gpio_count; | |
29 | }; | |
30 | ||
31 | #ifndef CONFIG_DM_GPIO | |
abce2c62 IC |
32 | static int sunxi_gpio_output(u32 pin, u32 val) |
33 | { | |
34 | u32 dat; | |
35 | u32 bank = GPIO_BANK(pin); | |
36 | u32 num = GPIO_NUM(pin); | |
37 | struct sunxi_gpio *pio = BANK_TO_GPIO(bank); | |
38 | ||
39 | dat = readl(&pio->dat); | |
40 | if (val) | |
41 | dat |= 0x1 << num; | |
42 | else | |
43 | dat &= ~(0x1 << num); | |
44 | ||
45 | writel(dat, &pio->dat); | |
46 | ||
47 | return 0; | |
48 | } | |
49 | ||
50 | static int sunxi_gpio_input(u32 pin) | |
51 | { | |
52 | u32 dat; | |
53 | u32 bank = GPIO_BANK(pin); | |
54 | u32 num = GPIO_NUM(pin); | |
55 | struct sunxi_gpio *pio = BANK_TO_GPIO(bank); | |
56 | ||
57 | dat = readl(&pio->dat); | |
58 | dat >>= num; | |
59 | ||
60 | return dat & 0x1; | |
61 | } | |
62 | ||
63 | int gpio_request(unsigned gpio, const char *label) | |
64 | { | |
65 | return 0; | |
66 | } | |
67 | ||
68 | int gpio_free(unsigned gpio) | |
69 | { | |
70 | return 0; | |
71 | } | |
72 | ||
73 | int gpio_direction_input(unsigned gpio) | |
74 | { | |
75 | sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_INPUT); | |
76 | ||
b0c4ae1a | 77 | return 0; |
abce2c62 IC |
78 | } |
79 | ||
80 | int gpio_direction_output(unsigned gpio, int value) | |
81 | { | |
82 | sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_OUTPUT); | |
83 | ||
84 | return sunxi_gpio_output(gpio, value); | |
85 | } | |
86 | ||
87 | int gpio_get_value(unsigned gpio) | |
88 | { | |
89 | return sunxi_gpio_input(gpio); | |
90 | } | |
91 | ||
92 | int gpio_set_value(unsigned gpio, int value) | |
93 | { | |
94 | return sunxi_gpio_output(gpio, value); | |
95 | } | |
96 | ||
97 | int sunxi_name_to_gpio(const char *name) | |
98 | { | |
99 | int group = 0; | |
100 | int groupsize = 9 * 32; | |
101 | long pin; | |
102 | char *eptr; | |
6c727e09 | 103 | |
abce2c62 IC |
104 | if (*name == 'P' || *name == 'p') |
105 | name++; | |
106 | if (*name >= 'A') { | |
107 | group = *name - (*name > 'a' ? 'a' : 'A'); | |
108 | groupsize = 32; | |
109 | name++; | |
110 | } | |
111 | ||
112 | pin = simple_strtol(name, &eptr, 10); | |
113 | if (!*name || *eptr) | |
114 | return -1; | |
115 | if (pin < 0 || pin > groupsize || group >= 9) | |
116 | return -1; | |
117 | return group * 32 + pin; | |
118 | } | |
7aa97485 SG |
119 | #endif |
120 | ||
746c087b HG |
121 | int sunxi_name_to_gpio_bank(const char *name) |
122 | { | |
123 | int group = 0; | |
124 | ||
125 | if (*name == 'P' || *name == 'p') | |
126 | name++; | |
127 | if (*name >= 'A') { | |
128 | group = *name - (*name > 'a' ? 'a' : 'A'); | |
129 | return group; | |
130 | } | |
131 | ||
132 | return -1; | |
133 | } | |
134 | ||
7aa97485 | 135 | #ifdef CONFIG_DM_GPIO |
a5ab8838 SG |
136 | /* TODO(sjg@chromium.org): Remove this function and use device tree */ |
137 | int sunxi_name_to_gpio(const char *name) | |
138 | { | |
139 | unsigned int gpio; | |
140 | int ret; | |
f9b7a04b HG |
141 | #if !defined CONFIG_SPL_BUILD && defined CONFIG_AXP_GPIO |
142 | char lookup[8]; | |
143 | ||
144 | if (strcasecmp(name, "AXP0-VBUS-DETECT") == 0) { | |
145 | sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d", | |
146 | SUNXI_GPIO_AXP0_VBUS_DETECT); | |
147 | name = lookup; | |
148 | } else if (strcasecmp(name, "AXP0-VBUS-ENABLE") == 0) { | |
149 | sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d", | |
150 | SUNXI_GPIO_AXP0_VBUS_ENABLE); | |
151 | name = lookup; | |
152 | } | |
153 | #endif | |
a5ab8838 SG |
154 | ret = gpio_lookup_name(name, NULL, NULL, &gpio); |
155 | ||
156 | return ret ? ret : gpio; | |
157 | } | |
158 | ||
7aa97485 SG |
159 | static int sunxi_gpio_direction_input(struct udevice *dev, unsigned offset) |
160 | { | |
161 | struct sunxi_gpio_platdata *plat = dev_get_platdata(dev); | |
162 | ||
163 | sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_INPUT); | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | static int sunxi_gpio_direction_output(struct udevice *dev, unsigned offset, | |
169 | int value) | |
170 | { | |
171 | struct sunxi_gpio_platdata *plat = dev_get_platdata(dev); | |
172 | u32 num = GPIO_NUM(offset); | |
173 | ||
174 | sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_OUTPUT); | |
175 | clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0); | |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
180 | static int sunxi_gpio_get_value(struct udevice *dev, unsigned offset) | |
181 | { | |
182 | struct sunxi_gpio_platdata *plat = dev_get_platdata(dev); | |
183 | u32 num = GPIO_NUM(offset); | |
184 | unsigned dat; | |
185 | ||
186 | dat = readl(&plat->regs->dat); | |
187 | dat >>= num; | |
188 | ||
189 | return dat & 0x1; | |
190 | } | |
191 | ||
192 | static int sunxi_gpio_set_value(struct udevice *dev, unsigned offset, | |
193 | int value) | |
194 | { | |
195 | struct sunxi_gpio_platdata *plat = dev_get_platdata(dev); | |
196 | u32 num = GPIO_NUM(offset); | |
197 | ||
198 | clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0); | |
199 | return 0; | |
200 | } | |
201 | ||
202 | static int sunxi_gpio_get_function(struct udevice *dev, unsigned offset) | |
203 | { | |
204 | struct sunxi_gpio_platdata *plat = dev_get_platdata(dev); | |
205 | int func; | |
206 | ||
207 | func = sunxi_gpio_get_cfgbank(plat->regs, offset); | |
208 | if (func == SUNXI_GPIO_OUTPUT) | |
209 | return GPIOF_OUTPUT; | |
210 | else if (func == SUNXI_GPIO_INPUT) | |
211 | return GPIOF_INPUT; | |
212 | else | |
213 | return GPIOF_FUNC; | |
214 | } | |
215 | ||
4694dc56 | 216 | static int sunxi_gpio_xlate(struct udevice *dev, struct gpio_desc *desc, |
3a57123e | 217 | struct ofnode_phandle_args *args) |
4694dc56 CYT |
218 | { |
219 | int ret; | |
220 | ||
221 | ret = device_get_child(dev, args->args[0], &desc->dev); | |
222 | if (ret) | |
223 | return ret; | |
224 | desc->offset = args->args[1]; | |
225 | desc->flags = args->args[2] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0; | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
7aa97485 SG |
230 | static const struct dm_gpio_ops gpio_sunxi_ops = { |
231 | .direction_input = sunxi_gpio_direction_input, | |
232 | .direction_output = sunxi_gpio_direction_output, | |
233 | .get_value = sunxi_gpio_get_value, | |
234 | .set_value = sunxi_gpio_set_value, | |
235 | .get_function = sunxi_gpio_get_function, | |
4694dc56 | 236 | .xlate = sunxi_gpio_xlate, |
7aa97485 SG |
237 | }; |
238 | ||
239 | /** | |
240 | * Returns the name of a GPIO bank | |
241 | * | |
242 | * GPIO banks are named A, B, C, ... | |
243 | * | |
244 | * @bank: Bank number (0, 1..n-1) | |
245 | * @return allocated string containing the name | |
246 | */ | |
247 | static char *gpio_bank_name(int bank) | |
248 | { | |
249 | char *name; | |
250 | ||
07ce60f3 | 251 | name = malloc(3); |
7aa97485 | 252 | if (name) { |
07ce60f3 SG |
253 | name[0] = 'P'; |
254 | name[1] = 'A' + bank; | |
255 | name[2] = '\0'; | |
7aa97485 SG |
256 | } |
257 | ||
258 | return name; | |
259 | } | |
260 | ||
261 | static int gpio_sunxi_probe(struct udevice *dev) | |
262 | { | |
263 | struct sunxi_gpio_platdata *plat = dev_get_platdata(dev); | |
e564f054 | 264 | struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); |
7aa97485 SG |
265 | |
266 | /* Tell the uclass how many GPIOs we have */ | |
267 | if (plat) { | |
268 | uc_priv->gpio_count = plat->gpio_count; | |
269 | uc_priv->bank_name = plat->bank_name; | |
270 | } | |
271 | ||
272 | return 0; | |
273 | } | |
6f82fac2 SW |
274 | |
275 | struct sunxi_gpio_soc_data { | |
276 | int start; | |
277 | int no_banks; | |
278 | }; | |
279 | ||
7aa97485 SG |
280 | /** |
281 | * We have a top-level GPIO device with no actual GPIOs. It has a child | |
282 | * device for each Sunxi bank. | |
283 | */ | |
284 | static int gpio_sunxi_bind(struct udevice *parent) | |
285 | { | |
6f82fac2 SW |
286 | struct sunxi_gpio_soc_data *soc_data = |
287 | (struct sunxi_gpio_soc_data *)dev_get_driver_data(parent); | |
7aa97485 SG |
288 | struct sunxi_gpio_platdata *plat = parent->platdata; |
289 | struct sunxi_gpio_reg *ctlr; | |
6f82fac2 | 290 | int bank, ret; |
7aa97485 SG |
291 | |
292 | /* If this is a child device, there is nothing to do here */ | |
293 | if (plat) | |
294 | return 0; | |
295 | ||
a821c4af | 296 | ctlr = (struct sunxi_gpio_reg *)devfdt_get_addr(parent); |
6f82fac2 | 297 | for (bank = 0; bank < soc_data->no_banks; bank++) { |
7aa97485 SG |
298 | struct sunxi_gpio_platdata *plat; |
299 | struct udevice *dev; | |
300 | ||
301 | plat = calloc(1, sizeof(*plat)); | |
302 | if (!plat) | |
303 | return -ENOMEM; | |
304 | plat->regs = &ctlr->gpio_bank[bank]; | |
6f82fac2 | 305 | plat->bank_name = gpio_bank_name(soc_data->start + bank); |
7aa97485 SG |
306 | plat->gpio_count = SUNXI_GPIOS_PER_BANK; |
307 | ||
308 | ret = device_bind(parent, parent->driver, | |
309 | plat->bank_name, plat, -1, &dev); | |
310 | if (ret) | |
311 | return ret; | |
e160f7d4 | 312 | dev_set_of_offset(dev, dev_of_offset(parent)); |
7aa97485 SG |
313 | } |
314 | ||
315 | return 0; | |
316 | } | |
317 | ||
6f82fac2 SW |
318 | static const struct sunxi_gpio_soc_data soc_data_a_all = { |
319 | .start = 0, | |
320 | .no_banks = SUNXI_GPIO_BANKS, | |
321 | }; | |
322 | ||
323 | static const struct sunxi_gpio_soc_data soc_data_l_1 = { | |
324 | .start = 'L' - 'A', | |
325 | .no_banks = 1, | |
326 | }; | |
327 | ||
328 | static const struct sunxi_gpio_soc_data soc_data_l_2 = { | |
329 | .start = 'L' - 'A', | |
330 | .no_banks = 2, | |
331 | }; | |
332 | ||
333 | static const struct sunxi_gpio_soc_data soc_data_l_3 = { | |
334 | .start = 'L' - 'A', | |
335 | .no_banks = 3, | |
336 | }; | |
337 | ||
338 | #define ID(_compat_, _soc_data_) \ | |
339 | { .compatible = _compat_, .data = (ulong)&soc_data_##_soc_data_ } | |
340 | ||
7aa97485 | 341 | static const struct udevice_id sunxi_gpio_ids[] = { |
6f82fac2 SW |
342 | ID("allwinner,sun4i-a10-pinctrl", a_all), |
343 | ID("allwinner,sun5i-a10s-pinctrl", a_all), | |
344 | ID("allwinner,sun5i-a13-pinctrl", a_all), | |
a6968ecb | 345 | ID("allwinner,sun50i-h5-pinctrl", a_all), |
6f82fac2 SW |
346 | ID("allwinner,sun6i-a31-pinctrl", a_all), |
347 | ID("allwinner,sun6i-a31s-pinctrl", a_all), | |
348 | ID("allwinner,sun7i-a20-pinctrl", a_all), | |
349 | ID("allwinner,sun8i-a23-pinctrl", a_all), | |
350 | ID("allwinner,sun8i-a33-pinctrl", a_all), | |
351 | ID("allwinner,sun8i-a83t-pinctrl", a_all), | |
352 | ID("allwinner,sun8i-h3-pinctrl", a_all), | |
33559ffe | 353 | ID("allwinner,sun8i-r40-pinctrl", a_all), |
381996c5 | 354 | ID("allwinner,sun8i-v3s-pinctrl", a_all), |
6f82fac2 | 355 | ID("allwinner,sun9i-a80-pinctrl", a_all), |
381996c5 | 356 | ID("allwinner,sun50i-a64-pinctrl", a_all), |
6f82fac2 SW |
357 | ID("allwinner,sun6i-a31-r-pinctrl", l_2), |
358 | ID("allwinner,sun8i-a23-r-pinctrl", l_1), | |
359 | ID("allwinner,sun8i-a83t-r-pinctrl", l_1), | |
360 | ID("allwinner,sun8i-h3-r-pinctrl", l_1), | |
361 | ID("allwinner,sun9i-a80-r-pinctrl", l_3), | |
381996c5 | 362 | ID("allwinner,sun50i-a64-r-pinctrl", l_1), |
7aa97485 SG |
363 | { } |
364 | }; | |
365 | ||
366 | U_BOOT_DRIVER(gpio_sunxi) = { | |
367 | .name = "gpio_sunxi", | |
368 | .id = UCLASS_GPIO, | |
369 | .ops = &gpio_sunxi_ops, | |
370 | .of_match = sunxi_gpio_ids, | |
371 | .bind = gpio_sunxi_bind, | |
372 | .probe = gpio_sunxi_probe, | |
373 | }; | |
374 | #endif |