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6#include <common.h>
7#include <dm.h>
8#include <log.h>
9#include <malloc.h>
10#include <asm/global_data.h>
11#include <dm/device-internal.h>
12#include <dm/device_compat.h>
13#include <dm/lists.h>
14#include <dm/pinctrl.h>
15#include <fdt_support.h>
16#include <linux/bitops.h>
17#include <linux/err.h>
18#include <linux/io.h>
19#include <linux/libfdt.h>
20#include <linux/sizes.h>
21#include <asm/gpio.h>
22
23#include "pinctrl-meson.h"
24
25DECLARE_GLOBAL_DATA_PTR;
26
27static const char *meson_pinctrl_dummy_name = "_dummy";
28
29static char pin_name[PINNAME_SIZE];
30
31int meson_pinctrl_get_groups_count(struct udevice *dev)
32{
33 struct meson_pinctrl *priv = dev_get_priv(dev);
34
35 return priv->data->num_groups;
36}
37
38const char *meson_pinctrl_get_group_name(struct udevice *dev,
39 unsigned int selector)
40{
41 struct meson_pinctrl *priv = dev_get_priv(dev);
42
43 if (!priv->data->groups[selector].name)
44 return meson_pinctrl_dummy_name;
45
46 return priv->data->groups[selector].name;
47}
48
49int meson_pinctrl_get_pins_count(struct udevice *dev)
50{
51 struct meson_pinctrl *priv = dev_get_priv(dev);
52
53 return priv->data->num_pins;
54}
55
56const char *meson_pinctrl_get_pin_name(struct udevice *dev,
57 unsigned int selector)
58{
59 struct meson_pinctrl *priv = dev_get_priv(dev);
60
61 if (selector > priv->data->num_pins ||
62 selector > priv->data->funcs[0].num_groups)
63 snprintf(pin_name, PINNAME_SIZE, "Error");
64 else
65 snprintf(pin_name, PINNAME_SIZE, "%s",
66 priv->data->funcs[0].groups[selector]);
67
68 return pin_name;
69}
70
71int meson_pinmux_get_functions_count(struct udevice *dev)
72{
73 struct meson_pinctrl *priv = dev_get_priv(dev);
74
75 return priv->data->num_funcs;
76}
77
78const char *meson_pinmux_get_function_name(struct udevice *dev,
79 unsigned int selector)
80{
81 struct meson_pinctrl *priv = dev_get_priv(dev);
82
83 return priv->data->funcs[selector].name;
84}
85
86static int meson_gpio_calc_reg_and_bit(struct udevice *dev, unsigned int offset,
87 enum meson_reg_type reg_type,
88 unsigned int *reg, unsigned int *bit)
89{
90 struct meson_pinctrl *priv = dev_get_priv(dev);
91 struct meson_bank *bank = NULL;
92 struct meson_reg_desc *desc;
93 unsigned int pin;
94 int i;
95
96 pin = priv->data->pin_base + offset;
97
98 for (i = 0; i < priv->data->num_banks; i++) {
99 if (pin >= priv->data->banks[i].first &&
100 pin <= priv->data->banks[i].last) {
101 bank = &priv->data->banks[i];
102 break;
103 }
104 }
105
106 if (!bank)
107 return -EINVAL;
108
109 desc = &bank->regs[reg_type];
110 *reg = desc->reg * 4;
111 *bit = desc->bit + pin - bank->first;
112
113 return 0;
114}
115
116int meson_gpio_get(struct udevice *dev, unsigned int offset)
117{
118 struct meson_pinctrl *priv = dev_get_priv(dev->parent);
119 unsigned int reg, bit;
120 int ret;
121
122 ret = meson_gpio_calc_reg_and_bit(dev->parent, offset, REG_IN, ®,
123 &bit);
124 if (ret)
125 return ret;
126
127 return !!(readl(priv->reg_gpio + reg) & BIT(bit));
128}
129
130int meson_gpio_set(struct udevice *dev, unsigned int offset, int value)
131{
132 struct meson_pinctrl *priv = dev_get_priv(dev->parent);
133 unsigned int reg, bit;
134 int ret;
135
136 ret = meson_gpio_calc_reg_and_bit(dev->parent, offset, REG_OUT, ®,
137 &bit);
138 if (ret)
139 return ret;
140
141 clrsetbits_le32(priv->reg_gpio + reg, BIT(bit), value ? BIT(bit) : 0);
142
143 return 0;
144}
145
146int meson_gpio_get_direction(struct udevice *dev, unsigned int offset)
147{
148 struct meson_pinctrl *priv = dev_get_priv(dev->parent);
149 unsigned int reg, bit, val;
150 int ret;
151
152 ret = meson_gpio_calc_reg_and_bit(dev->parent, offset, REG_DIR, ®,
153 &bit);
154 if (ret)
155 return ret;
156
157 val = readl(priv->reg_gpio + reg);
158
159 return (val & BIT(bit)) ? GPIOF_INPUT : GPIOF_OUTPUT;
160}
161
162int meson_gpio_direction_input(struct udevice *dev, unsigned int offset)
163{
164 struct meson_pinctrl *priv = dev_get_priv(dev->parent);
165 unsigned int reg, bit;
166 int ret;
167
168 ret = meson_gpio_calc_reg_and_bit(dev->parent, offset, REG_DIR, ®,
169 &bit);
170 if (ret)
171 return ret;
172
173 setbits_le32(priv->reg_gpio + reg, BIT(bit));
174
175 return 0;
176}
177
178int meson_gpio_direction_output(struct udevice *dev,
179 unsigned int offset, int value)
180{
181 struct meson_pinctrl *priv = dev_get_priv(dev->parent);
182 unsigned int reg, bit;
183 int ret;
184
185 ret = meson_gpio_calc_reg_and_bit(dev->parent, offset, REG_DIR, ®,
186 &bit);
187 if (ret)
188 return ret;
189
190 clrbits_le32(priv->reg_gpio + reg, BIT(bit));
191
192 ret = meson_gpio_calc_reg_and_bit(dev->parent, offset, REG_OUT, ®,
193 &bit);
194 if (ret)
195 return ret;
196
197 clrsetbits_le32(priv->reg_gpio + reg, BIT(bit), value ? BIT(bit) : 0);
198
199 return 0;
200}
201
202static int meson_pinconf_bias_set(struct udevice *dev, unsigned int pin,
203 unsigned int param)
204{
205 struct meson_pinctrl *priv = dev_get_priv(dev);
206 unsigned int offset = pin - priv->data->pin_base;
207 unsigned int reg, bit;
208 int ret;
209
210 ret = meson_gpio_calc_reg_and_bit(dev, offset, REG_PULLEN, ®, &bit);
211 if (ret)
212 return ret;
213
214 if (param == PIN_CONFIG_BIAS_DISABLE) {
215 clrsetbits_le32(priv->reg_pullen + reg, BIT(bit), 0);
216 return 0;
217 }
218
219
220 clrsetbits_le32(priv->reg_pullen + reg, BIT(bit), BIT(bit));
221 ret = meson_gpio_calc_reg_and_bit(dev, offset, REG_PULL, ®, &bit);
222 if (ret)
223 return ret;
224
225 clrsetbits_le32(priv->reg_pull + reg, BIT(bit),
226 (param == PIN_CONFIG_BIAS_PULL_UP ? BIT(bit) : 0));
227
228 return 0;
229}
230
231static int meson_pinconf_drive_strength_set(struct udevice *dev,
232 unsigned int pin,
233 unsigned int drive_strength_ua)
234{
235 struct meson_pinctrl *priv = dev_get_priv(dev);
236 unsigned int offset = pin - priv->data->pin_base;
237 unsigned int reg, bit;
238 unsigned int ds_val;
239 int ret;
240
241 if (!priv->reg_ds) {
242 dev_err(dev, "drive-strength-microamp not supported\n");
243 return -ENOTSUPP;
244 }
245
246 ret = meson_gpio_calc_reg_and_bit(dev, offset, REG_DS, ®, &bit);
247 if (ret)
248 return ret;
249
250 bit = bit << 1;
251
252 if (drive_strength_ua <= 500) {
253 ds_val = MESON_PINCONF_DRV_500UA;
254 } else if (drive_strength_ua <= 2500) {
255 ds_val = MESON_PINCONF_DRV_2500UA;
256 } else if (drive_strength_ua <= 3000) {
257 ds_val = MESON_PINCONF_DRV_3000UA;
258 } else if (drive_strength_ua <= 4000) {
259 ds_val = MESON_PINCONF_DRV_4000UA;
260 } else {
261 dev_warn(dev,
262 "pin %u: invalid drive-strength-microamp : %d , default to 4mA\n",
263 pin, drive_strength_ua);
264 ds_val = MESON_PINCONF_DRV_4000UA;
265 }
266
267 clrsetbits_le32(priv->reg_ds + reg, 0x3 << bit, ds_val << bit);
268
269 return 0;
270}
271
272int meson_pinconf_set(struct udevice *dev, unsigned int pin,
273 unsigned int param, unsigned int arg)
274{
275 int ret;
276
277 switch (param) {
278 case PIN_CONFIG_BIAS_DISABLE:
279 case PIN_CONFIG_BIAS_PULL_UP:
280 case PIN_CONFIG_BIAS_PULL_DOWN:
281 ret = meson_pinconf_bias_set(dev, pin, param);
282 break;
283 case PIN_CONFIG_DRIVE_STRENGTH_UA:
284 ret = meson_pinconf_drive_strength_set(dev, pin, arg);
285 break;
286 default:
287 dev_err(dev, "unsupported configuration parameter %u\n", param);
288 return -EINVAL;
289 }
290
291 return ret;
292}
293
294int meson_pinconf_group_set(struct udevice *dev,
295 unsigned int group_selector,
296 unsigned int param, unsigned int arg)
297{
298 struct meson_pinctrl *priv = dev_get_priv(dev);
299 struct meson_pmx_group *grp = &priv->data->groups[group_selector];
300 int i, ret;
301
302 for (i = 0; i < grp->num_pins; i++) {
303 ret = meson_pinconf_set(dev, grp->pins[i], param, arg);
304 if (ret)
305 return ret;
306 }
307
308 return 0;
309}
310
311int meson_gpio_probe(struct udevice *dev)
312{
313 struct meson_pinctrl *priv = dev_get_priv(dev->parent);
314 struct gpio_dev_priv *uc_priv;
315
316 uc_priv = dev_get_uclass_priv(dev);
317 uc_priv->bank_name = priv->data->name;
318 uc_priv->gpio_count = priv->data->num_pins;
319
320 return 0;
321}
322
323static fdt_addr_t parse_address(int offset, const char *name, int na, int ns)
324{
325 int index, len = 0;
326 const fdt32_t *reg;
327
328 index = fdt_stringlist_search(gd->fdt_blob, offset, "reg-names", name);
329 if (index < 0)
330 return FDT_ADDR_T_NONE;
331
332 reg = fdt_getprop(gd->fdt_blob, offset, "reg", &len);
333 if (!reg || (len <= (index * sizeof(fdt32_t) * (na + ns))))
334 return FDT_ADDR_T_NONE;
335
336 reg += index * (na + ns);
337
338 return fdt_translate_address((void *)gd->fdt_blob, offset, reg);
339}
340
341int meson_pinctrl_probe(struct udevice *dev)
342{
343 struct meson_pinctrl *priv = dev_get_priv(dev);
344 struct uclass_driver *drv;
345 struct udevice *gpio_dev;
346 fdt_addr_t addr;
347 int node, gpio = -1, len;
348 int na, ns;
349 char *name;
350
351
352 na = fdt_address_cells(gd->fdt_blob, dev_of_offset(dev->parent));
353 if (na < 1) {
354 debug("bad #address-cells\n");
355 return -EINVAL;
356 }
357
358 ns = fdt_size_cells(gd->fdt_blob, dev_of_offset(dev->parent));
359 if (ns < 1) {
360 debug("bad #size-cells\n");
361 return -EINVAL;
362 }
363
364 fdt_for_each_subnode(node, gd->fdt_blob, dev_of_offset(dev)) {
365 if (fdt_getprop(gd->fdt_blob, node, "gpio-controller", &len)) {
366 gpio = node;
367 break;
368 }
369 }
370
371 if (!gpio) {
372 debug("gpio node not found\n");
373 return -EINVAL;
374 }
375
376 addr = parse_address(gpio, "mux", na, ns);
377 if (addr == FDT_ADDR_T_NONE) {
378 debug("mux address not found\n");
379 return -EINVAL;
380 }
381 priv->reg_mux = (void __iomem *)addr;
382
383 addr = parse_address(gpio, "gpio", na, ns);
384 if (addr == FDT_ADDR_T_NONE) {
385 debug("gpio address not found\n");
386 return -EINVAL;
387 }
388 priv->reg_gpio = (void __iomem *)addr;
389
390 addr = parse_address(gpio, "pull", na, ns);
391
392 if (addr == FDT_ADDR_T_NONE)
393 priv->reg_pull = priv->reg_gpio;
394 else
395 priv->reg_pull = (void __iomem *)addr;
396
397 addr = parse_address(gpio, "pull-enable", na, ns);
398
399 if (addr == FDT_ADDR_T_NONE)
400 priv->reg_pullen = priv->reg_pull;
401 else
402 priv->reg_pullen = (void __iomem *)addr;
403
404 addr = parse_address(gpio, "ds", na, ns);
405
406 if (addr == FDT_ADDR_T_NONE)
407 priv->reg_ds = NULL;
408 else
409 priv->reg_ds = (void __iomem *)addr;
410
411 priv->data = (struct meson_pinctrl_data *)dev_get_driver_data(dev);
412
413
414 drv = lists_uclass_lookup(UCLASS_GPIO);
415 if (!drv) {
416 puts("Cannot find GPIO driver\n");
417 return -ENOENT;
418 }
419
420 name = calloc(1, 32);
421 sprintf(name, "meson-gpio");
422
423
424 device_bind(dev, priv->data->gpio_driver, name, NULL,
425 offset_to_ofnode(gpio), &gpio_dev);
426
427 return 0;
428}
429
