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6732ae5c JCPV |
1 | /* |
2 | * at91 pinctrl driver based on at91 pinmux core | |
3 | * | |
4 | * Copyright (C) 2011-2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | |
5 | * | |
6 | * Under GPLv2 only | |
7 | */ | |
8 | ||
9 | #include <linux/clk.h> | |
10 | #include <linux/err.h> | |
11 | #include <linux/init.h> | |
6732ae5c JCPV |
12 | #include <linux/of.h> |
13 | #include <linux/of_device.h> | |
14 | #include <linux/of_address.h> | |
15 | #include <linux/of_irq.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/interrupt.h> | |
6732ae5c | 18 | #include <linux/io.h> |
1c5fb66a | 19 | #include <linux/gpio/driver.h> |
6732ae5c JCPV |
20 | #include <linux/pinctrl/machine.h> |
21 | #include <linux/pinctrl/pinconf.h> | |
22 | #include <linux/pinctrl/pinctrl.h> | |
23 | #include <linux/pinctrl/pinmux.h> | |
24 | /* Since we request GPIOs from ourself */ | |
25 | #include <linux/pinctrl/consumer.h> | |
26 | ||
c654b6bf | 27 | #include "pinctrl-at91.h" |
6732ae5c JCPV |
28 | #include "core.h" |
29 | ||
94daf85e | 30 | #define MAX_GPIO_BANKS 5 |
6732ae5c JCPV |
31 | #define MAX_NB_GPIO_PER_BANK 32 |
32 | ||
33 | struct at91_pinctrl_mux_ops; | |
34 | ||
35 | struct at91_gpio_chip { | |
36 | struct gpio_chip chip; | |
37 | struct pinctrl_gpio_range range; | |
38 | struct at91_gpio_chip *next; /* Bank sharing same clock */ | |
39 | int pioc_hwirq; /* PIO bank interrupt identifier on AIC */ | |
40 | int pioc_virq; /* PIO bank Linux virtual interrupt */ | |
41 | int pioc_idx; /* PIO bank index */ | |
42 | void __iomem *regbase; /* PIO bank virtual address */ | |
43 | struct clk *clock; /* associated clock */ | |
6732ae5c JCPV |
44 | struct at91_pinctrl_mux_ops *ops; /* ops */ |
45 | }; | |
46 | ||
6732ae5c JCPV |
47 | static struct at91_gpio_chip *gpio_chips[MAX_GPIO_BANKS]; |
48 | ||
49 | static int gpio_banks; | |
50 | ||
525fae21 | 51 | #define PULL_UP (1 << 0) |
6732ae5c | 52 | #define MULTI_DRIVE (1 << 1) |
7ebd7a3a JCPV |
53 | #define DEGLITCH (1 << 2) |
54 | #define PULL_DOWN (1 << 3) | |
55 | #define DIS_SCHMIT (1 << 4) | |
4334ac2d MR |
56 | #define DRIVE_STRENGTH_SHIFT 5 |
57 | #define DRIVE_STRENGTH_MASK 0x3 | |
58 | #define DRIVE_STRENGTH (DRIVE_STRENGTH_MASK << DRIVE_STRENGTH_SHIFT) | |
96bb12de BB |
59 | #define OUTPUT (1 << 7) |
60 | #define OUTPUT_VAL_SHIFT 8 | |
61 | #define OUTPUT_VAL (0x1 << OUTPUT_VAL_SHIFT) | |
7ebd7a3a JCPV |
62 | #define DEBOUNCE (1 << 16) |
63 | #define DEBOUNCE_VAL_SHIFT 17 | |
64 | #define DEBOUNCE_VAL (0x3fff << DEBOUNCE_VAL_SHIFT) | |
6732ae5c | 65 | |
4334ac2d MR |
66 | /** |
67 | * These defines will translated the dt binding settings to our internal | |
68 | * settings. They are not necessarily the same value as the register setting. | |
69 | * The actual drive strength current of low, medium and high must be looked up | |
70 | * from the corresponding device datasheet. This value is different for pins | |
71 | * that are even in the same banks. It is also dependent on VCC. | |
72 | * DRIVE_STRENGTH_DEFAULT is just a placeholder to avoid changing the drive | |
73 | * strength when there is no dt config for it. | |
74 | */ | |
75 | #define DRIVE_STRENGTH_DEFAULT (0 << DRIVE_STRENGTH_SHIFT) | |
76 | #define DRIVE_STRENGTH_LOW (1 << DRIVE_STRENGTH_SHIFT) | |
77 | #define DRIVE_STRENGTH_MED (2 << DRIVE_STRENGTH_SHIFT) | |
78 | #define DRIVE_STRENGTH_HI (3 << DRIVE_STRENGTH_SHIFT) | |
79 | ||
6732ae5c JCPV |
80 | /** |
81 | * struct at91_pmx_func - describes AT91 pinmux functions | |
82 | * @name: the name of this specific function | |
83 | * @groups: corresponding pin groups | |
84 | * @ngroups: the number of groups | |
85 | */ | |
86 | struct at91_pmx_func { | |
87 | const char *name; | |
88 | const char **groups; | |
89 | unsigned ngroups; | |
90 | }; | |
91 | ||
92 | enum at91_mux { | |
93 | AT91_MUX_GPIO = 0, | |
94 | AT91_MUX_PERIPH_A = 1, | |
95 | AT91_MUX_PERIPH_B = 2, | |
96 | AT91_MUX_PERIPH_C = 3, | |
97 | AT91_MUX_PERIPH_D = 4, | |
98 | }; | |
99 | ||
100 | /** | |
101 | * struct at91_pmx_pin - describes an At91 pin mux | |
102 | * @bank: the bank of the pin | |
103 | * @pin: the pin number in the @bank | |
104 | * @mux: the mux mode : gpio or periph_x of the pin i.e. alternate function. | |
105 | * @conf: the configuration of the pin: PULL_UP, MULTIDRIVE etc... | |
106 | */ | |
107 | struct at91_pmx_pin { | |
108 | uint32_t bank; | |
109 | uint32_t pin; | |
110 | enum at91_mux mux; | |
111 | unsigned long conf; | |
112 | }; | |
113 | ||
114 | /** | |
115 | * struct at91_pin_group - describes an At91 pin group | |
116 | * @name: the name of this specific pin group | |
117 | * @pins_conf: the mux mode for each pin in this group. The size of this | |
118 | * array is the same as pins. | |
119 | * @pins: an array of discrete physical pins used in this group, taken | |
120 | * from the driver-local pin enumeration space | |
121 | * @npins: the number of pins in this group array, i.e. the number of | |
122 | * elements in .pins so we can iterate over that array | |
123 | */ | |
124 | struct at91_pin_group { | |
125 | const char *name; | |
126 | struct at91_pmx_pin *pins_conf; | |
127 | unsigned int *pins; | |
128 | unsigned npins; | |
129 | }; | |
130 | ||
131 | /** | |
c2eb9e7f | 132 | * struct at91_pinctrl_mux_ops - describes an AT91 mux ops group |
6732ae5c JCPV |
133 | * on new IP with support for periph C and D the way to mux in |
134 | * periph A and B has changed | |
135 | * So provide the right call back | |
136 | * if not present means the IP does not support it | |
137 | * @get_periph: return the periph mode configured | |
138 | * @mux_A_periph: mux as periph A | |
139 | * @mux_B_periph: mux as periph B | |
140 | * @mux_C_periph: mux as periph C | |
141 | * @mux_D_periph: mux as periph D | |
7ebd7a3a JCPV |
142 | * @get_deglitch: get deglitch status |
143 | * @set_deglitch: enable/disable deglitch | |
144 | * @get_debounce: get debounce status | |
145 | * @set_debounce: enable/disable debounce | |
146 | * @get_pulldown: get pulldown status | |
147 | * @set_pulldown: enable/disable pulldown | |
148 | * @get_schmitt_trig: get schmitt trigger status | |
149 | * @disable_schmitt_trig: disable schmitt trigger | |
6732ae5c JCPV |
150 | * @irq_type: return irq type |
151 | */ | |
152 | struct at91_pinctrl_mux_ops { | |
153 | enum at91_mux (*get_periph)(void __iomem *pio, unsigned mask); | |
154 | void (*mux_A_periph)(void __iomem *pio, unsigned mask); | |
155 | void (*mux_B_periph)(void __iomem *pio, unsigned mask); | |
156 | void (*mux_C_periph)(void __iomem *pio, unsigned mask); | |
157 | void (*mux_D_periph)(void __iomem *pio, unsigned mask); | |
7ebd7a3a | 158 | bool (*get_deglitch)(void __iomem *pio, unsigned pin); |
77966ad7 | 159 | void (*set_deglitch)(void __iomem *pio, unsigned mask, bool is_on); |
7ebd7a3a | 160 | bool (*get_debounce)(void __iomem *pio, unsigned pin, u32 *div); |
77966ad7 | 161 | void (*set_debounce)(void __iomem *pio, unsigned mask, bool is_on, u32 div); |
7ebd7a3a | 162 | bool (*get_pulldown)(void __iomem *pio, unsigned pin); |
77966ad7 | 163 | void (*set_pulldown)(void __iomem *pio, unsigned mask, bool is_on); |
7ebd7a3a JCPV |
164 | bool (*get_schmitt_trig)(void __iomem *pio, unsigned pin); |
165 | void (*disable_schmitt_trig)(void __iomem *pio, unsigned mask); | |
4334ac2d MR |
166 | unsigned (*get_drivestrength)(void __iomem *pio, unsigned pin); |
167 | void (*set_drivestrength)(void __iomem *pio, unsigned pin, | |
168 | u32 strength); | |
6732ae5c JCPV |
169 | /* irq */ |
170 | int (*irq_type)(struct irq_data *d, unsigned type); | |
171 | }; | |
172 | ||
173 | static int gpio_irq_type(struct irq_data *d, unsigned type); | |
174 | static int alt_gpio_irq_type(struct irq_data *d, unsigned type); | |
175 | ||
176 | struct at91_pinctrl { | |
177 | struct device *dev; | |
178 | struct pinctrl_dev *pctl; | |
179 | ||
a0b957f3 | 180 | int nactive_banks; |
6732ae5c JCPV |
181 | |
182 | uint32_t *mux_mask; | |
183 | int nmux; | |
184 | ||
185 | struct at91_pmx_func *functions; | |
186 | int nfunctions; | |
187 | ||
188 | struct at91_pin_group *groups; | |
189 | int ngroups; | |
190 | ||
191 | struct at91_pinctrl_mux_ops *ops; | |
192 | }; | |
193 | ||
56411f3c | 194 | static inline const struct at91_pin_group *at91_pinctrl_find_group_by_name( |
6732ae5c JCPV |
195 | const struct at91_pinctrl *info, |
196 | const char *name) | |
197 | { | |
198 | const struct at91_pin_group *grp = NULL; | |
199 | int i; | |
200 | ||
201 | for (i = 0; i < info->ngroups; i++) { | |
202 | if (strcmp(info->groups[i].name, name)) | |
203 | continue; | |
204 | ||
205 | grp = &info->groups[i]; | |
206 | dev_dbg(info->dev, "%s: %d 0:%d\n", name, grp->npins, grp->pins[0]); | |
207 | break; | |
208 | } | |
209 | ||
210 | return grp; | |
211 | } | |
212 | ||
213 | static int at91_get_groups_count(struct pinctrl_dev *pctldev) | |
214 | { | |
215 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
216 | ||
217 | return info->ngroups; | |
218 | } | |
219 | ||
220 | static const char *at91_get_group_name(struct pinctrl_dev *pctldev, | |
221 | unsigned selector) | |
222 | { | |
223 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
224 | ||
225 | return info->groups[selector].name; | |
226 | } | |
227 | ||
228 | static int at91_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector, | |
229 | const unsigned **pins, | |
230 | unsigned *npins) | |
231 | { | |
232 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
233 | ||
234 | if (selector >= info->ngroups) | |
235 | return -EINVAL; | |
236 | ||
237 | *pins = info->groups[selector].pins; | |
238 | *npins = info->groups[selector].npins; | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
243 | static void at91_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, | |
244 | unsigned offset) | |
245 | { | |
246 | seq_printf(s, "%s", dev_name(pctldev->dev)); | |
247 | } | |
248 | ||
249 | static int at91_dt_node_to_map(struct pinctrl_dev *pctldev, | |
250 | struct device_node *np, | |
251 | struct pinctrl_map **map, unsigned *num_maps) | |
252 | { | |
253 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
254 | const struct at91_pin_group *grp; | |
255 | struct pinctrl_map *new_map; | |
256 | struct device_node *parent; | |
257 | int map_num = 1; | |
258 | int i; | |
6732ae5c JCPV |
259 | |
260 | /* | |
61e310a1 | 261 | * first find the group of this node and check if we need to create |
6732ae5c JCPV |
262 | * config maps for pins |
263 | */ | |
264 | grp = at91_pinctrl_find_group_by_name(info, np->name); | |
265 | if (!grp) { | |
94f4e54c RH |
266 | dev_err(info->dev, "unable to find group for node %pOFn\n", |
267 | np); | |
6732ae5c JCPV |
268 | return -EINVAL; |
269 | } | |
270 | ||
271 | map_num += grp->npins; | |
a86854d0 KC |
272 | new_map = devm_kcalloc(pctldev->dev, map_num, sizeof(*new_map), |
273 | GFP_KERNEL); | |
6732ae5c JCPV |
274 | if (!new_map) |
275 | return -ENOMEM; | |
276 | ||
277 | *map = new_map; | |
278 | *num_maps = map_num; | |
279 | ||
280 | /* create mux map */ | |
281 | parent = of_get_parent(np); | |
282 | if (!parent) { | |
c62b2b34 | 283 | devm_kfree(pctldev->dev, new_map); |
6732ae5c JCPV |
284 | return -EINVAL; |
285 | } | |
286 | new_map[0].type = PIN_MAP_TYPE_MUX_GROUP; | |
287 | new_map[0].data.mux.function = parent->name; | |
288 | new_map[0].data.mux.group = np->name; | |
289 | of_node_put(parent); | |
290 | ||
291 | /* create config map */ | |
292 | new_map++; | |
293 | for (i = 0; i < grp->npins; i++) { | |
6732ae5c JCPV |
294 | new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN; |
295 | new_map[i].data.configs.group_or_pin = | |
296 | pin_get_name(pctldev, grp->pins[i]); | |
297 | new_map[i].data.configs.configs = &grp->pins_conf[i].conf; | |
298 | new_map[i].data.configs.num_configs = 1; | |
299 | } | |
300 | ||
301 | dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n", | |
302 | (*map)->data.mux.function, (*map)->data.mux.group, map_num); | |
303 | ||
304 | return 0; | |
305 | } | |
306 | ||
307 | static void at91_dt_free_map(struct pinctrl_dev *pctldev, | |
308 | struct pinctrl_map *map, unsigned num_maps) | |
309 | { | |
310 | } | |
311 | ||
022ab148 | 312 | static const struct pinctrl_ops at91_pctrl_ops = { |
6732ae5c JCPV |
313 | .get_groups_count = at91_get_groups_count, |
314 | .get_group_name = at91_get_group_name, | |
315 | .get_group_pins = at91_get_group_pins, | |
316 | .pin_dbg_show = at91_pin_dbg_show, | |
317 | .dt_node_to_map = at91_dt_node_to_map, | |
318 | .dt_free_map = at91_dt_free_map, | |
319 | }; | |
320 | ||
3c93600d | 321 | static void __iomem *pin_to_controller(struct at91_pinctrl *info, |
6732ae5c JCPV |
322 | unsigned int bank) |
323 | { | |
1ab36387 DD |
324 | if (!gpio_chips[bank]) |
325 | return NULL; | |
326 | ||
6732ae5c JCPV |
327 | return gpio_chips[bank]->regbase; |
328 | } | |
329 | ||
330 | static inline int pin_to_bank(unsigned pin) | |
331 | { | |
332 | return pin /= MAX_NB_GPIO_PER_BANK; | |
333 | } | |
334 | ||
335 | static unsigned pin_to_mask(unsigned int pin) | |
336 | { | |
337 | return 1 << pin; | |
338 | } | |
339 | ||
4334ac2d MR |
340 | static unsigned two_bit_pin_value_shift_amount(unsigned int pin) |
341 | { | |
342 | /* return the shift value for a pin for "two bit" per pin registers, | |
343 | * i.e. drive strength */ | |
344 | return 2*((pin >= MAX_NB_GPIO_PER_BANK/2) | |
345 | ? pin - MAX_NB_GPIO_PER_BANK/2 : pin); | |
346 | } | |
347 | ||
348 | static unsigned sama5d3_get_drive_register(unsigned int pin) | |
349 | { | |
350 | /* drive strength is split between two registers | |
351 | * with two bits per pin */ | |
352 | return (pin >= MAX_NB_GPIO_PER_BANK/2) | |
353 | ? SAMA5D3_PIO_DRIVER2 : SAMA5D3_PIO_DRIVER1; | |
354 | } | |
355 | ||
356 | static unsigned at91sam9x5_get_drive_register(unsigned int pin) | |
357 | { | |
358 | /* drive strength is split between two registers | |
359 | * with two bits per pin */ | |
360 | return (pin >= MAX_NB_GPIO_PER_BANK/2) | |
361 | ? AT91SAM9X5_PIO_DRIVER2 : AT91SAM9X5_PIO_DRIVER1; | |
362 | } | |
363 | ||
6732ae5c JCPV |
364 | static void at91_mux_disable_interrupt(void __iomem *pio, unsigned mask) |
365 | { | |
366 | writel_relaxed(mask, pio + PIO_IDR); | |
367 | } | |
368 | ||
369 | static unsigned at91_mux_get_pullup(void __iomem *pio, unsigned pin) | |
370 | { | |
05d3534a | 371 | return !((readl_relaxed(pio + PIO_PUSR) >> pin) & 0x1); |
6732ae5c JCPV |
372 | } |
373 | ||
374 | static void at91_mux_set_pullup(void __iomem *pio, unsigned mask, bool on) | |
375 | { | |
3d784273 WY |
376 | if (on) |
377 | writel_relaxed(mask, pio + PIO_PPDDR); | |
378 | ||
6732ae5c JCPV |
379 | writel_relaxed(mask, pio + (on ? PIO_PUER : PIO_PUDR)); |
380 | } | |
381 | ||
96bb12de BB |
382 | static bool at91_mux_get_output(void __iomem *pio, unsigned int pin, bool *val) |
383 | { | |
384 | *val = (readl_relaxed(pio + PIO_ODSR) >> pin) & 0x1; | |
385 | return (readl_relaxed(pio + PIO_OSR) >> pin) & 0x1; | |
386 | } | |
387 | ||
388 | static void at91_mux_set_output(void __iomem *pio, unsigned int mask, | |
389 | bool is_on, bool val) | |
390 | { | |
391 | writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR)); | |
392 | writel_relaxed(mask, pio + (is_on ? PIO_OER : PIO_ODR)); | |
393 | } | |
394 | ||
6732ae5c JCPV |
395 | static unsigned at91_mux_get_multidrive(void __iomem *pio, unsigned pin) |
396 | { | |
397 | return (readl_relaxed(pio + PIO_MDSR) >> pin) & 0x1; | |
398 | } | |
399 | ||
400 | static void at91_mux_set_multidrive(void __iomem *pio, unsigned mask, bool on) | |
401 | { | |
402 | writel_relaxed(mask, pio + (on ? PIO_MDER : PIO_MDDR)); | |
403 | } | |
404 | ||
405 | static void at91_mux_set_A_periph(void __iomem *pio, unsigned mask) | |
406 | { | |
407 | writel_relaxed(mask, pio + PIO_ASR); | |
408 | } | |
409 | ||
410 | static void at91_mux_set_B_periph(void __iomem *pio, unsigned mask) | |
411 | { | |
412 | writel_relaxed(mask, pio + PIO_BSR); | |
413 | } | |
414 | ||
415 | static void at91_mux_pio3_set_A_periph(void __iomem *pio, unsigned mask) | |
416 | { | |
417 | ||
418 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) & ~mask, | |
419 | pio + PIO_ABCDSR1); | |
420 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) & ~mask, | |
421 | pio + PIO_ABCDSR2); | |
422 | } | |
423 | ||
424 | static void at91_mux_pio3_set_B_periph(void __iomem *pio, unsigned mask) | |
425 | { | |
426 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) | mask, | |
427 | pio + PIO_ABCDSR1); | |
428 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) & ~mask, | |
429 | pio + PIO_ABCDSR2); | |
430 | } | |
431 | ||
432 | static void at91_mux_pio3_set_C_periph(void __iomem *pio, unsigned mask) | |
433 | { | |
434 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) & ~mask, pio + PIO_ABCDSR1); | |
435 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) | mask, pio + PIO_ABCDSR2); | |
436 | } | |
437 | ||
438 | static void at91_mux_pio3_set_D_periph(void __iomem *pio, unsigned mask) | |
439 | { | |
440 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) | mask, pio + PIO_ABCDSR1); | |
441 | writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) | mask, pio + PIO_ABCDSR2); | |
442 | } | |
443 | ||
444 | static enum at91_mux at91_mux_pio3_get_periph(void __iomem *pio, unsigned mask) | |
445 | { | |
446 | unsigned select; | |
447 | ||
448 | if (readl_relaxed(pio + PIO_PSR) & mask) | |
449 | return AT91_MUX_GPIO; | |
450 | ||
451 | select = !!(readl_relaxed(pio + PIO_ABCDSR1) & mask); | |
452 | select |= (!!(readl_relaxed(pio + PIO_ABCDSR2) & mask) << 1); | |
453 | ||
454 | return select + 1; | |
455 | } | |
456 | ||
457 | static enum at91_mux at91_mux_get_periph(void __iomem *pio, unsigned mask) | |
458 | { | |
459 | unsigned select; | |
460 | ||
461 | if (readl_relaxed(pio + PIO_PSR) & mask) | |
462 | return AT91_MUX_GPIO; | |
463 | ||
464 | select = readl_relaxed(pio + PIO_ABSR) & mask; | |
465 | ||
466 | return select + 1; | |
467 | } | |
468 | ||
7ebd7a3a JCPV |
469 | static bool at91_mux_get_deglitch(void __iomem *pio, unsigned pin) |
470 | { | |
d480239b | 471 | return (readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1; |
7ebd7a3a JCPV |
472 | } |
473 | ||
474 | static void at91_mux_set_deglitch(void __iomem *pio, unsigned mask, bool is_on) | |
475 | { | |
d480239b | 476 | writel_relaxed(mask, pio + (is_on ? PIO_IFER : PIO_IFDR)); |
7ebd7a3a JCPV |
477 | } |
478 | ||
c8dba02e BB |
479 | static bool at91_mux_pio3_get_deglitch(void __iomem *pio, unsigned pin) |
480 | { | |
d480239b BD |
481 | if ((readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1) |
482 | return !((readl_relaxed(pio + PIO_IFSCSR) >> pin) & 0x1); | |
c8dba02e BB |
483 | |
484 | return false; | |
485 | } | |
486 | ||
7ebd7a3a JCPV |
487 | static void at91_mux_pio3_set_deglitch(void __iomem *pio, unsigned mask, bool is_on) |
488 | { | |
489 | if (is_on) | |
d480239b | 490 | writel_relaxed(mask, pio + PIO_IFSCDR); |
7ebd7a3a JCPV |
491 | at91_mux_set_deglitch(pio, mask, is_on); |
492 | } | |
493 | ||
494 | static bool at91_mux_pio3_get_debounce(void __iomem *pio, unsigned pin, u32 *div) | |
495 | { | |
d480239b | 496 | *div = readl_relaxed(pio + PIO_SCDR); |
7ebd7a3a | 497 | |
d480239b BD |
498 | return ((readl_relaxed(pio + PIO_IFSR) >> pin) & 0x1) && |
499 | ((readl_relaxed(pio + PIO_IFSCSR) >> pin) & 0x1); | |
7ebd7a3a JCPV |
500 | } |
501 | ||
502 | static void at91_mux_pio3_set_debounce(void __iomem *pio, unsigned mask, | |
503 | bool is_on, u32 div) | |
504 | { | |
505 | if (is_on) { | |
d480239b BD |
506 | writel_relaxed(mask, pio + PIO_IFSCER); |
507 | writel_relaxed(div & PIO_SCDR_DIV, pio + PIO_SCDR); | |
508 | writel_relaxed(mask, pio + PIO_IFER); | |
c8dba02e | 509 | } else |
d480239b | 510 | writel_relaxed(mask, pio + PIO_IFSCDR); |
7ebd7a3a JCPV |
511 | } |
512 | ||
513 | static bool at91_mux_pio3_get_pulldown(void __iomem *pio, unsigned pin) | |
514 | { | |
d480239b | 515 | return !((readl_relaxed(pio + PIO_PPDSR) >> pin) & 0x1); |
7ebd7a3a JCPV |
516 | } |
517 | ||
518 | static void at91_mux_pio3_set_pulldown(void __iomem *pio, unsigned mask, bool is_on) | |
519 | { | |
3d784273 | 520 | if (is_on) |
d480239b | 521 | writel_relaxed(mask, pio + PIO_PUDR); |
3d784273 | 522 | |
d480239b | 523 | writel_relaxed(mask, pio + (is_on ? PIO_PPDER : PIO_PPDDR)); |
7ebd7a3a JCPV |
524 | } |
525 | ||
526 | static void at91_mux_pio3_disable_schmitt_trig(void __iomem *pio, unsigned mask) | |
527 | { | |
d480239b | 528 | writel_relaxed(readl_relaxed(pio + PIO_SCHMITT) | mask, pio + PIO_SCHMITT); |
7ebd7a3a JCPV |
529 | } |
530 | ||
531 | static bool at91_mux_pio3_get_schmitt_trig(void __iomem *pio, unsigned pin) | |
532 | { | |
d480239b | 533 | return (readl_relaxed(pio + PIO_SCHMITT) >> pin) & 0x1; |
7ebd7a3a JCPV |
534 | } |
535 | ||
4334ac2d MR |
536 | static inline u32 read_drive_strength(void __iomem *reg, unsigned pin) |
537 | { | |
d480239b | 538 | unsigned tmp = readl_relaxed(reg); |
4334ac2d MR |
539 | |
540 | tmp = tmp >> two_bit_pin_value_shift_amount(pin); | |
541 | ||
542 | return tmp & DRIVE_STRENGTH_MASK; | |
543 | } | |
544 | ||
545 | static unsigned at91_mux_sama5d3_get_drivestrength(void __iomem *pio, | |
546 | unsigned pin) | |
547 | { | |
548 | unsigned tmp = read_drive_strength(pio + | |
549 | sama5d3_get_drive_register(pin), pin); | |
550 | ||
551 | /* SAMA5 strength is 1:1 with our defines, | |
552 | * except 0 is equivalent to low per datasheet */ | |
553 | if (!tmp) | |
554 | tmp = DRIVE_STRENGTH_LOW; | |
555 | ||
556 | return tmp; | |
557 | } | |
558 | ||
559 | static unsigned at91_mux_sam9x5_get_drivestrength(void __iomem *pio, | |
560 | unsigned pin) | |
561 | { | |
562 | unsigned tmp = read_drive_strength(pio + | |
563 | at91sam9x5_get_drive_register(pin), pin); | |
564 | ||
565 | /* strength is inverse in SAM9x5s hardware with the pinctrl defines | |
566 | * hardware: 0 = hi, 1 = med, 2 = low, 3 = rsvd */ | |
567 | tmp = DRIVE_STRENGTH_HI - tmp; | |
568 | ||
569 | return tmp; | |
570 | } | |
571 | ||
572 | static void set_drive_strength(void __iomem *reg, unsigned pin, u32 strength) | |
573 | { | |
d480239b | 574 | unsigned tmp = readl_relaxed(reg); |
4334ac2d MR |
575 | unsigned shift = two_bit_pin_value_shift_amount(pin); |
576 | ||
577 | tmp &= ~(DRIVE_STRENGTH_MASK << shift); | |
578 | tmp |= strength << shift; | |
579 | ||
d480239b | 580 | writel_relaxed(tmp, reg); |
4334ac2d MR |
581 | } |
582 | ||
583 | static void at91_mux_sama5d3_set_drivestrength(void __iomem *pio, unsigned pin, | |
584 | u32 setting) | |
585 | { | |
586 | /* do nothing if setting is zero */ | |
587 | if (!setting) | |
588 | return; | |
589 | ||
590 | /* strength is 1 to 1 with setting for SAMA5 */ | |
591 | set_drive_strength(pio + sama5d3_get_drive_register(pin), pin, setting); | |
592 | } | |
593 | ||
594 | static void at91_mux_sam9x5_set_drivestrength(void __iomem *pio, unsigned pin, | |
595 | u32 setting) | |
596 | { | |
597 | /* do nothing if setting is zero */ | |
598 | if (!setting) | |
599 | return; | |
600 | ||
601 | /* strength is inverse on SAM9x5s with our defines | |
602 | * 0 = hi, 1 = med, 2 = low, 3 = rsvd */ | |
603 | setting = DRIVE_STRENGTH_HI - setting; | |
604 | ||
605 | set_drive_strength(pio + at91sam9x5_get_drive_register(pin), pin, | |
606 | setting); | |
607 | } | |
608 | ||
6732ae5c JCPV |
609 | static struct at91_pinctrl_mux_ops at91rm9200_ops = { |
610 | .get_periph = at91_mux_get_periph, | |
611 | .mux_A_periph = at91_mux_set_A_periph, | |
612 | .mux_B_periph = at91_mux_set_B_periph, | |
7ebd7a3a JCPV |
613 | .get_deglitch = at91_mux_get_deglitch, |
614 | .set_deglitch = at91_mux_set_deglitch, | |
6732ae5c JCPV |
615 | .irq_type = gpio_irq_type, |
616 | }; | |
617 | ||
618 | static struct at91_pinctrl_mux_ops at91sam9x5_ops = { | |
619 | .get_periph = at91_mux_pio3_get_periph, | |
620 | .mux_A_periph = at91_mux_pio3_set_A_periph, | |
621 | .mux_B_periph = at91_mux_pio3_set_B_periph, | |
622 | .mux_C_periph = at91_mux_pio3_set_C_periph, | |
623 | .mux_D_periph = at91_mux_pio3_set_D_periph, | |
c8dba02e | 624 | .get_deglitch = at91_mux_pio3_get_deglitch, |
7ebd7a3a JCPV |
625 | .set_deglitch = at91_mux_pio3_set_deglitch, |
626 | .get_debounce = at91_mux_pio3_get_debounce, | |
627 | .set_debounce = at91_mux_pio3_set_debounce, | |
628 | .get_pulldown = at91_mux_pio3_get_pulldown, | |
629 | .set_pulldown = at91_mux_pio3_set_pulldown, | |
630 | .get_schmitt_trig = at91_mux_pio3_get_schmitt_trig, | |
631 | .disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig, | |
4334ac2d MR |
632 | .get_drivestrength = at91_mux_sam9x5_get_drivestrength, |
633 | .set_drivestrength = at91_mux_sam9x5_set_drivestrength, | |
634 | .irq_type = alt_gpio_irq_type, | |
635 | }; | |
636 | ||
637 | static struct at91_pinctrl_mux_ops sama5d3_ops = { | |
638 | .get_periph = at91_mux_pio3_get_periph, | |
639 | .mux_A_periph = at91_mux_pio3_set_A_periph, | |
640 | .mux_B_periph = at91_mux_pio3_set_B_periph, | |
641 | .mux_C_periph = at91_mux_pio3_set_C_periph, | |
642 | .mux_D_periph = at91_mux_pio3_set_D_periph, | |
643 | .get_deglitch = at91_mux_pio3_get_deglitch, | |
644 | .set_deglitch = at91_mux_pio3_set_deglitch, | |
645 | .get_debounce = at91_mux_pio3_get_debounce, | |
646 | .set_debounce = at91_mux_pio3_set_debounce, | |
647 | .get_pulldown = at91_mux_pio3_get_pulldown, | |
648 | .set_pulldown = at91_mux_pio3_set_pulldown, | |
649 | .get_schmitt_trig = at91_mux_pio3_get_schmitt_trig, | |
650 | .disable_schmitt_trig = at91_mux_pio3_disable_schmitt_trig, | |
651 | .get_drivestrength = at91_mux_sama5d3_get_drivestrength, | |
652 | .set_drivestrength = at91_mux_sama5d3_set_drivestrength, | |
6732ae5c JCPV |
653 | .irq_type = alt_gpio_irq_type, |
654 | }; | |
655 | ||
656 | static void at91_pin_dbg(const struct device *dev, const struct at91_pmx_pin *pin) | |
657 | { | |
658 | if (pin->mux) { | |
4b6fe45a | 659 | dev_dbg(dev, "pio%c%d configured as periph%c with conf = 0x%lx\n", |
6732ae5c JCPV |
660 | pin->bank + 'A', pin->pin, pin->mux - 1 + 'A', pin->conf); |
661 | } else { | |
4b6fe45a | 662 | dev_dbg(dev, "pio%c%d configured as gpio with conf = 0x%lx\n", |
6732ae5c JCPV |
663 | pin->bank + 'A', pin->pin, pin->conf); |
664 | } | |
665 | } | |
666 | ||
3c93600d | 667 | static int pin_check_config(struct at91_pinctrl *info, const char *name, |
6732ae5c JCPV |
668 | int index, const struct at91_pmx_pin *pin) |
669 | { | |
670 | int mux; | |
671 | ||
672 | /* check if it's a valid config */ | |
a0b957f3 | 673 | if (pin->bank >= gpio_banks) { |
6732ae5c | 674 | dev_err(info->dev, "%s: pin conf %d bank_id %d >= nbanks %d\n", |
a0b957f3 | 675 | name, index, pin->bank, gpio_banks); |
6732ae5c JCPV |
676 | return -EINVAL; |
677 | } | |
678 | ||
a0b957f3 JCPV |
679 | if (!gpio_chips[pin->bank]) { |
680 | dev_err(info->dev, "%s: pin conf %d bank_id %d not enabled\n", | |
681 | name, index, pin->bank); | |
682 | return -ENXIO; | |
683 | } | |
684 | ||
6732ae5c JCPV |
685 | if (pin->pin >= MAX_NB_GPIO_PER_BANK) { |
686 | dev_err(info->dev, "%s: pin conf %d pin_bank_id %d >= %d\n", | |
687 | name, index, pin->pin, MAX_NB_GPIO_PER_BANK); | |
688 | return -EINVAL; | |
689 | } | |
690 | ||
691 | if (!pin->mux) | |
692 | return 0; | |
693 | ||
694 | mux = pin->mux - 1; | |
695 | ||
696 | if (mux >= info->nmux) { | |
697 | dev_err(info->dev, "%s: pin conf %d mux_id %d >= nmux %d\n", | |
698 | name, index, mux, info->nmux); | |
699 | return -EINVAL; | |
700 | } | |
701 | ||
702 | if (!(info->mux_mask[pin->bank * info->nmux + mux] & 1 << pin->pin)) { | |
703 | dev_err(info->dev, "%s: pin conf %d mux_id %d not supported for pio%c%d\n", | |
704 | name, index, mux, pin->bank + 'A', pin->pin); | |
705 | return -EINVAL; | |
706 | } | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
711 | static void at91_mux_gpio_disable(void __iomem *pio, unsigned mask) | |
712 | { | |
713 | writel_relaxed(mask, pio + PIO_PDR); | |
714 | } | |
715 | ||
716 | static void at91_mux_gpio_enable(void __iomem *pio, unsigned mask, bool input) | |
717 | { | |
718 | writel_relaxed(mask, pio + PIO_PER); | |
719 | writel_relaxed(mask, pio + (input ? PIO_ODR : PIO_OER)); | |
720 | } | |
721 | ||
03e9f0ca LW |
722 | static int at91_pmx_set(struct pinctrl_dev *pctldev, unsigned selector, |
723 | unsigned group) | |
6732ae5c JCPV |
724 | { |
725 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
726 | const struct at91_pmx_pin *pins_conf = info->groups[group].pins_conf; | |
727 | const struct at91_pmx_pin *pin; | |
728 | uint32_t npins = info->groups[group].npins; | |
729 | int i, ret; | |
730 | unsigned mask; | |
731 | void __iomem *pio; | |
732 | ||
733 | dev_dbg(info->dev, "enable function %s group %s\n", | |
734 | info->functions[selector].name, info->groups[group].name); | |
735 | ||
736 | /* first check that all the pins of the group are valid with a valid | |
61e310a1 | 737 | * parameter */ |
6732ae5c JCPV |
738 | for (i = 0; i < npins; i++) { |
739 | pin = &pins_conf[i]; | |
740 | ret = pin_check_config(info, info->groups[group].name, i, pin); | |
741 | if (ret) | |
742 | return ret; | |
743 | } | |
744 | ||
745 | for (i = 0; i < npins; i++) { | |
746 | pin = &pins_conf[i]; | |
747 | at91_pin_dbg(info->dev, pin); | |
748 | pio = pin_to_controller(info, pin->bank); | |
1ab36387 DD |
749 | |
750 | if (!pio) | |
751 | continue; | |
752 | ||
6732ae5c JCPV |
753 | mask = pin_to_mask(pin->pin); |
754 | at91_mux_disable_interrupt(pio, mask); | |
3c93600d | 755 | switch (pin->mux) { |
6732ae5c JCPV |
756 | case AT91_MUX_GPIO: |
757 | at91_mux_gpio_enable(pio, mask, 1); | |
758 | break; | |
759 | case AT91_MUX_PERIPH_A: | |
760 | info->ops->mux_A_periph(pio, mask); | |
761 | break; | |
762 | case AT91_MUX_PERIPH_B: | |
763 | info->ops->mux_B_periph(pio, mask); | |
764 | break; | |
765 | case AT91_MUX_PERIPH_C: | |
766 | if (!info->ops->mux_C_periph) | |
767 | return -EINVAL; | |
768 | info->ops->mux_C_periph(pio, mask); | |
769 | break; | |
770 | case AT91_MUX_PERIPH_D: | |
771 | if (!info->ops->mux_D_periph) | |
772 | return -EINVAL; | |
773 | info->ops->mux_D_periph(pio, mask); | |
774 | break; | |
775 | } | |
776 | if (pin->mux) | |
777 | at91_mux_gpio_disable(pio, mask); | |
778 | } | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
6732ae5c JCPV |
783 | static int at91_pmx_get_funcs_count(struct pinctrl_dev *pctldev) |
784 | { | |
785 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
786 | ||
787 | return info->nfunctions; | |
788 | } | |
789 | ||
790 | static const char *at91_pmx_get_func_name(struct pinctrl_dev *pctldev, | |
791 | unsigned selector) | |
792 | { | |
793 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
794 | ||
795 | return info->functions[selector].name; | |
796 | } | |
797 | ||
798 | static int at91_pmx_get_groups(struct pinctrl_dev *pctldev, unsigned selector, | |
799 | const char * const **groups, | |
800 | unsigned * const num_groups) | |
801 | { | |
802 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
803 | ||
804 | *groups = info->functions[selector].groups; | |
805 | *num_groups = info->functions[selector].ngroups; | |
806 | ||
807 | return 0; | |
808 | } | |
809 | ||
f6f94f66 AL |
810 | static int at91_gpio_request_enable(struct pinctrl_dev *pctldev, |
811 | struct pinctrl_gpio_range *range, | |
812 | unsigned offset) | |
6732ae5c JCPV |
813 | { |
814 | struct at91_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
815 | struct at91_gpio_chip *at91_chip; | |
816 | struct gpio_chip *chip; | |
817 | unsigned mask; | |
818 | ||
819 | if (!range) { | |
820 | dev_err(npct->dev, "invalid range\n"); | |
821 | return -EINVAL; | |
822 | } | |
823 | if (!range->gc) { | |
824 | dev_err(npct->dev, "missing GPIO chip in range\n"); | |
825 | return -EINVAL; | |
826 | } | |
827 | chip = range->gc; | |
370ea611 | 828 | at91_chip = gpiochip_get_data(chip); |
6732ae5c JCPV |
829 | |
830 | dev_dbg(npct->dev, "enable pin %u as GPIO\n", offset); | |
831 | ||
832 | mask = 1 << (offset - chip->base); | |
833 | ||
834 | dev_dbg(npct->dev, "enable pin %u as PIO%c%d 0x%x\n", | |
835 | offset, 'A' + range->id, offset - chip->base, mask); | |
836 | ||
837 | writel_relaxed(mask, at91_chip->regbase + PIO_PER); | |
838 | ||
839 | return 0; | |
840 | } | |
841 | ||
f6f94f66 AL |
842 | static void at91_gpio_disable_free(struct pinctrl_dev *pctldev, |
843 | struct pinctrl_gpio_range *range, | |
844 | unsigned offset) | |
6732ae5c JCPV |
845 | { |
846 | struct at91_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev); | |
847 | ||
848 | dev_dbg(npct->dev, "disable pin %u as GPIO\n", offset); | |
849 | /* Set the pin to some default state, GPIO is usually default */ | |
850 | } | |
851 | ||
022ab148 | 852 | static const struct pinmux_ops at91_pmx_ops = { |
6732ae5c JCPV |
853 | .get_functions_count = at91_pmx_get_funcs_count, |
854 | .get_function_name = at91_pmx_get_func_name, | |
855 | .get_function_groups = at91_pmx_get_groups, | |
03e9f0ca | 856 | .set_mux = at91_pmx_set, |
6732ae5c JCPV |
857 | .gpio_request_enable = at91_gpio_request_enable, |
858 | .gpio_disable_free = at91_gpio_disable_free, | |
859 | }; | |
860 | ||
861 | static int at91_pinconf_get(struct pinctrl_dev *pctldev, | |
862 | unsigned pin_id, unsigned long *config) | |
863 | { | |
864 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
865 | void __iomem *pio; | |
866 | unsigned pin; | |
7ebd7a3a | 867 | int div; |
96bb12de | 868 | bool out; |
6732ae5c | 869 | |
1292e693 AB |
870 | *config = 0; |
871 | dev_dbg(info->dev, "%s:%d, pin_id=%d", __func__, __LINE__, pin_id); | |
6732ae5c | 872 | pio = pin_to_controller(info, pin_to_bank(pin_id)); |
1ab36387 DD |
873 | |
874 | if (!pio) | |
875 | return -EINVAL; | |
876 | ||
6732ae5c JCPV |
877 | pin = pin_id % MAX_NB_GPIO_PER_BANK; |
878 | ||
879 | if (at91_mux_get_multidrive(pio, pin)) | |
880 | *config |= MULTI_DRIVE; | |
881 | ||
882 | if (at91_mux_get_pullup(pio, pin)) | |
883 | *config |= PULL_UP; | |
884 | ||
7ebd7a3a JCPV |
885 | if (info->ops->get_deglitch && info->ops->get_deglitch(pio, pin)) |
886 | *config |= DEGLITCH; | |
887 | if (info->ops->get_debounce && info->ops->get_debounce(pio, pin, &div)) | |
888 | *config |= DEBOUNCE | (div << DEBOUNCE_VAL_SHIFT); | |
889 | if (info->ops->get_pulldown && info->ops->get_pulldown(pio, pin)) | |
890 | *config |= PULL_DOWN; | |
891 | if (info->ops->get_schmitt_trig && info->ops->get_schmitt_trig(pio, pin)) | |
892 | *config |= DIS_SCHMIT; | |
4334ac2d MR |
893 | if (info->ops->get_drivestrength) |
894 | *config |= (info->ops->get_drivestrength(pio, pin) | |
895 | << DRIVE_STRENGTH_SHIFT); | |
96bb12de BB |
896 | if (at91_mux_get_output(pio, pin, &out)) |
897 | *config |= OUTPUT | (out << OUTPUT_VAL_SHIFT); | |
7ebd7a3a | 898 | |
6732ae5c JCPV |
899 | return 0; |
900 | } | |
901 | ||
902 | static int at91_pinconf_set(struct pinctrl_dev *pctldev, | |
03b054e9 SY |
903 | unsigned pin_id, unsigned long *configs, |
904 | unsigned num_configs) | |
6732ae5c JCPV |
905 | { |
906 | struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); | |
907 | unsigned mask; | |
908 | void __iomem *pio; | |
03b054e9 SY |
909 | int i; |
910 | unsigned long config; | |
4334ac2d | 911 | unsigned pin; |
03b054e9 SY |
912 | |
913 | for (i = 0; i < num_configs; i++) { | |
914 | config = configs[i]; | |
915 | ||
916 | dev_dbg(info->dev, | |
917 | "%s:%d, pin_id=%d, config=0x%lx", | |
918 | __func__, __LINE__, pin_id, config); | |
919 | pio = pin_to_controller(info, pin_to_bank(pin_id)); | |
1ab36387 DD |
920 | |
921 | if (!pio) | |
922 | return -EINVAL; | |
923 | ||
4334ac2d MR |
924 | pin = pin_id % MAX_NB_GPIO_PER_BANK; |
925 | mask = pin_to_mask(pin); | |
03b054e9 SY |
926 | |
927 | if (config & PULL_UP && config & PULL_DOWN) | |
928 | return -EINVAL; | |
929 | ||
96bb12de BB |
930 | at91_mux_set_output(pio, mask, config & OUTPUT, |
931 | (config & OUTPUT_VAL) >> OUTPUT_VAL_SHIFT); | |
03b054e9 SY |
932 | at91_mux_set_pullup(pio, mask, config & PULL_UP); |
933 | at91_mux_set_multidrive(pio, mask, config & MULTI_DRIVE); | |
934 | if (info->ops->set_deglitch) | |
935 | info->ops->set_deglitch(pio, mask, config & DEGLITCH); | |
936 | if (info->ops->set_debounce) | |
937 | info->ops->set_debounce(pio, mask, config & DEBOUNCE, | |
7ebd7a3a | 938 | (config & DEBOUNCE_VAL) >> DEBOUNCE_VAL_SHIFT); |
03b054e9 SY |
939 | if (info->ops->set_pulldown) |
940 | info->ops->set_pulldown(pio, mask, config & PULL_DOWN); | |
941 | if (info->ops->disable_schmitt_trig && config & DIS_SCHMIT) | |
942 | info->ops->disable_schmitt_trig(pio, mask); | |
4334ac2d MR |
943 | if (info->ops->set_drivestrength) |
944 | info->ops->set_drivestrength(pio, pin, | |
945 | (config & DRIVE_STRENGTH) | |
946 | >> DRIVE_STRENGTH_SHIFT); | |
03b054e9 SY |
947 | |
948 | } /* for each config */ | |
7ebd7a3a | 949 | |
6732ae5c JCPV |
950 | return 0; |
951 | } | |
952 | ||
4d9b8a8e AB |
953 | #define DBG_SHOW_FLAG(flag) do { \ |
954 | if (config & flag) { \ | |
955 | if (num_conf) \ | |
956 | seq_puts(s, "|"); \ | |
957 | seq_puts(s, #flag); \ | |
958 | num_conf++; \ | |
959 | } \ | |
960 | } while (0) | |
961 | ||
4334ac2d MR |
962 | #define DBG_SHOW_FLAG_MASKED(mask,flag) do { \ |
963 | if ((config & mask) == flag) { \ | |
964 | if (num_conf) \ | |
965 | seq_puts(s, "|"); \ | |
966 | seq_puts(s, #flag); \ | |
967 | num_conf++; \ | |
968 | } \ | |
969 | } while (0) | |
970 | ||
6732ae5c JCPV |
971 | static void at91_pinconf_dbg_show(struct pinctrl_dev *pctldev, |
972 | struct seq_file *s, unsigned pin_id) | |
973 | { | |
4d9b8a8e | 974 | unsigned long config; |
445d2026 | 975 | int val, num_conf = 0; |
4d9b8a8e | 976 | |
445d2026 | 977 | at91_pinconf_get(pctldev, pin_id, &config); |
4d9b8a8e AB |
978 | |
979 | DBG_SHOW_FLAG(MULTI_DRIVE); | |
980 | DBG_SHOW_FLAG(PULL_UP); | |
981 | DBG_SHOW_FLAG(PULL_DOWN); | |
982 | DBG_SHOW_FLAG(DIS_SCHMIT); | |
983 | DBG_SHOW_FLAG(DEGLITCH); | |
4334ac2d MR |
984 | DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_LOW); |
985 | DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_MED); | |
986 | DBG_SHOW_FLAG_MASKED(DRIVE_STRENGTH, DRIVE_STRENGTH_HI); | |
4d9b8a8e AB |
987 | DBG_SHOW_FLAG(DEBOUNCE); |
988 | if (config & DEBOUNCE) { | |
989 | val = config >> DEBOUNCE_VAL_SHIFT; | |
990 | seq_printf(s, "(%d)", val); | |
991 | } | |
6732ae5c | 992 | |
4d9b8a8e | 993 | return; |
6732ae5c JCPV |
994 | } |
995 | ||
996 | static void at91_pinconf_group_dbg_show(struct pinctrl_dev *pctldev, | |
997 | struct seq_file *s, unsigned group) | |
998 | { | |
999 | } | |
1000 | ||
022ab148 | 1001 | static const struct pinconf_ops at91_pinconf_ops = { |
6732ae5c JCPV |
1002 | .pin_config_get = at91_pinconf_get, |
1003 | .pin_config_set = at91_pinconf_set, | |
1004 | .pin_config_dbg_show = at91_pinconf_dbg_show, | |
1005 | .pin_config_group_dbg_show = at91_pinconf_group_dbg_show, | |
1006 | }; | |
1007 | ||
1008 | static struct pinctrl_desc at91_pinctrl_desc = { | |
1009 | .pctlops = &at91_pctrl_ops, | |
1010 | .pmxops = &at91_pmx_ops, | |
1011 | .confops = &at91_pinconf_ops, | |
1012 | .owner = THIS_MODULE, | |
1013 | }; | |
1014 | ||
1015 | static const char *gpio_compat = "atmel,at91rm9200-gpio"; | |
1016 | ||
150632b0 GKH |
1017 | static void at91_pinctrl_child_count(struct at91_pinctrl *info, |
1018 | struct device_node *np) | |
6732ae5c JCPV |
1019 | { |
1020 | struct device_node *child; | |
1021 | ||
1022 | for_each_child_of_node(np, child) { | |
1023 | if (of_device_is_compatible(child, gpio_compat)) { | |
a0b957f3 JCPV |
1024 | if (of_device_is_available(child)) |
1025 | info->nactive_banks++; | |
6732ae5c JCPV |
1026 | } else { |
1027 | info->nfunctions++; | |
1028 | info->ngroups += of_get_child_count(child); | |
1029 | } | |
1030 | } | |
1031 | } | |
1032 | ||
150632b0 GKH |
1033 | static int at91_pinctrl_mux_mask(struct at91_pinctrl *info, |
1034 | struct device_node *np) | |
6732ae5c JCPV |
1035 | { |
1036 | int ret = 0; | |
1037 | int size; | |
1164d73a | 1038 | const __be32 *list; |
6732ae5c JCPV |
1039 | |
1040 | list = of_get_property(np, "atmel,mux-mask", &size); | |
1041 | if (!list) { | |
1042 | dev_err(info->dev, "can not read the mux-mask of %d\n", size); | |
1043 | return -EINVAL; | |
1044 | } | |
1045 | ||
1046 | size /= sizeof(*list); | |
a0b957f3 JCPV |
1047 | if (!size || size % gpio_banks) { |
1048 | dev_err(info->dev, "wrong mux mask array should be by %d\n", gpio_banks); | |
6732ae5c JCPV |
1049 | return -EINVAL; |
1050 | } | |
a0b957f3 | 1051 | info->nmux = size / gpio_banks; |
6732ae5c | 1052 | |
a86854d0 KC |
1053 | info->mux_mask = devm_kcalloc(info->dev, size, sizeof(u32), |
1054 | GFP_KERNEL); | |
3da941b0 | 1055 | if (!info->mux_mask) |
6732ae5c | 1056 | return -ENOMEM; |
6732ae5c JCPV |
1057 | |
1058 | ret = of_property_read_u32_array(np, "atmel,mux-mask", | |
1059 | info->mux_mask, size); | |
1060 | if (ret) | |
1061 | dev_err(info->dev, "can not read the mux-mask of %d\n", size); | |
1062 | return ret; | |
1063 | } | |
1064 | ||
150632b0 GKH |
1065 | static int at91_pinctrl_parse_groups(struct device_node *np, |
1066 | struct at91_pin_group *grp, | |
1067 | struct at91_pinctrl *info, u32 index) | |
6732ae5c JCPV |
1068 | { |
1069 | struct at91_pmx_pin *pin; | |
1070 | int size; | |
1164d73a | 1071 | const __be32 *list; |
6732ae5c JCPV |
1072 | int i, j; |
1073 | ||
94f4e54c | 1074 | dev_dbg(info->dev, "group(%d): %pOFn\n", index, np); |
6732ae5c JCPV |
1075 | |
1076 | /* Initialise group */ | |
1077 | grp->name = np->name; | |
1078 | ||
1079 | /* | |
1080 | * the binding format is atmel,pins = <bank pin mux CONFIG ...>, | |
1081 | * do sanity check and calculate pins number | |
1082 | */ | |
1083 | list = of_get_property(np, "atmel,pins", &size); | |
1084 | /* we do not check return since it's safe node passed down */ | |
1085 | size /= sizeof(*list); | |
1086 | if (!size || size % 4) { | |
1087 | dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n"); | |
1088 | return -EINVAL; | |
1089 | } | |
1090 | ||
1091 | grp->npins = size / 4; | |
a86854d0 KC |
1092 | pin = grp->pins_conf = devm_kcalloc(info->dev, |
1093 | grp->npins, | |
1094 | sizeof(struct at91_pmx_pin), | |
1095 | GFP_KERNEL); | |
1096 | grp->pins = devm_kcalloc(info->dev, grp->npins, sizeof(unsigned int), | |
1097 | GFP_KERNEL); | |
6732ae5c JCPV |
1098 | if (!grp->pins_conf || !grp->pins) |
1099 | return -ENOMEM; | |
1100 | ||
1101 | for (i = 0, j = 0; i < size; i += 4, j++) { | |
1102 | pin->bank = be32_to_cpu(*list++); | |
1103 | pin->pin = be32_to_cpu(*list++); | |
1104 | grp->pins[j] = pin->bank * MAX_NB_GPIO_PER_BANK + pin->pin; | |
1105 | pin->mux = be32_to_cpu(*list++); | |
1106 | pin->conf = be32_to_cpu(*list++); | |
1107 | ||
1108 | at91_pin_dbg(info->dev, pin); | |
1109 | pin++; | |
1110 | } | |
1111 | ||
1112 | return 0; | |
1113 | } | |
1114 | ||
150632b0 GKH |
1115 | static int at91_pinctrl_parse_functions(struct device_node *np, |
1116 | struct at91_pinctrl *info, u32 index) | |
6732ae5c JCPV |
1117 | { |
1118 | struct device_node *child; | |
1119 | struct at91_pmx_func *func; | |
1120 | struct at91_pin_group *grp; | |
1121 | int ret; | |
1122 | static u32 grp_index; | |
1123 | u32 i = 0; | |
1124 | ||
94f4e54c | 1125 | dev_dbg(info->dev, "parse function(%d): %pOFn\n", index, np); |
6732ae5c JCPV |
1126 | |
1127 | func = &info->functions[index]; | |
1128 | ||
1129 | /* Initialise function */ | |
1130 | func->name = np->name; | |
1131 | func->ngroups = of_get_child_count(np); | |
ca7162ad | 1132 | if (func->ngroups == 0) { |
6732ae5c JCPV |
1133 | dev_err(info->dev, "no groups defined\n"); |
1134 | return -EINVAL; | |
1135 | } | |
a86854d0 KC |
1136 | func->groups = devm_kcalloc(info->dev, |
1137 | func->ngroups, sizeof(char *), GFP_KERNEL); | |
6732ae5c JCPV |
1138 | if (!func->groups) |
1139 | return -ENOMEM; | |
1140 | ||
1141 | for_each_child_of_node(np, child) { | |
1142 | func->groups[i] = child->name; | |
1143 | grp = &info->groups[grp_index++]; | |
1144 | ret = at91_pinctrl_parse_groups(child, grp, info, i++); | |
d94b986a JL |
1145 | if (ret) { |
1146 | of_node_put(child); | |
6732ae5c | 1147 | return ret; |
d94b986a | 1148 | } |
6732ae5c JCPV |
1149 | } |
1150 | ||
1151 | return 0; | |
1152 | } | |
1153 | ||
baa9946e | 1154 | static const struct of_device_id at91_pinctrl_of_match[] = { |
4334ac2d | 1155 | { .compatible = "atmel,sama5d3-pinctrl", .data = &sama5d3_ops }, |
6732ae5c JCPV |
1156 | { .compatible = "atmel,at91sam9x5-pinctrl", .data = &at91sam9x5_ops }, |
1157 | { .compatible = "atmel,at91rm9200-pinctrl", .data = &at91rm9200_ops }, | |
1158 | { /* sentinel */ } | |
1159 | }; | |
1160 | ||
150632b0 GKH |
1161 | static int at91_pinctrl_probe_dt(struct platform_device *pdev, |
1162 | struct at91_pinctrl *info) | |
6732ae5c JCPV |
1163 | { |
1164 | int ret = 0; | |
1165 | int i, j; | |
1166 | uint32_t *tmp; | |
1167 | struct device_node *np = pdev->dev.of_node; | |
1168 | struct device_node *child; | |
1169 | ||
1170 | if (!np) | |
1171 | return -ENODEV; | |
1172 | ||
1173 | info->dev = &pdev->dev; | |
3c93600d | 1174 | info->ops = (struct at91_pinctrl_mux_ops *) |
6732ae5c JCPV |
1175 | of_match_device(at91_pinctrl_of_match, &pdev->dev)->data; |
1176 | at91_pinctrl_child_count(info, np); | |
1177 | ||
a0b957f3 | 1178 | if (gpio_banks < 1) { |
61e310a1 | 1179 | dev_err(&pdev->dev, "you need to specify at least one gpio-controller\n"); |
6732ae5c JCPV |
1180 | return -EINVAL; |
1181 | } | |
1182 | ||
1183 | ret = at91_pinctrl_mux_mask(info, np); | |
1184 | if (ret) | |
1185 | return ret; | |
1186 | ||
1187 | dev_dbg(&pdev->dev, "nmux = %d\n", info->nmux); | |
1188 | ||
1189 | dev_dbg(&pdev->dev, "mux-mask\n"); | |
1190 | tmp = info->mux_mask; | |
a0b957f3 | 1191 | for (i = 0; i < gpio_banks; i++) { |
6732ae5c JCPV |
1192 | for (j = 0; j < info->nmux; j++, tmp++) { |
1193 | dev_dbg(&pdev->dev, "%d:%d\t0x%x\n", i, j, tmp[0]); | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions); | |
1198 | dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups); | |
a86854d0 KC |
1199 | info->functions = devm_kcalloc(&pdev->dev, |
1200 | info->nfunctions, | |
1201 | sizeof(struct at91_pmx_func), | |
6732ae5c JCPV |
1202 | GFP_KERNEL); |
1203 | if (!info->functions) | |
1204 | return -ENOMEM; | |
1205 | ||
a86854d0 KC |
1206 | info->groups = devm_kcalloc(&pdev->dev, |
1207 | info->ngroups, | |
1208 | sizeof(struct at91_pin_group), | |
6732ae5c JCPV |
1209 | GFP_KERNEL); |
1210 | if (!info->groups) | |
1211 | return -ENOMEM; | |
1212 | ||
a0b957f3 | 1213 | dev_dbg(&pdev->dev, "nbanks = %d\n", gpio_banks); |
6732ae5c JCPV |
1214 | dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions); |
1215 | dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups); | |
1216 | ||
1217 | i = 0; | |
1218 | ||
1219 | for_each_child_of_node(np, child) { | |
1220 | if (of_device_is_compatible(child, gpio_compat)) | |
1221 | continue; | |
1222 | ret = at91_pinctrl_parse_functions(child, info, i++); | |
1223 | if (ret) { | |
1224 | dev_err(&pdev->dev, "failed to parse function\n"); | |
d94b986a | 1225 | of_node_put(child); |
6732ae5c JCPV |
1226 | return ret; |
1227 | } | |
1228 | } | |
1229 | ||
1230 | return 0; | |
1231 | } | |
1232 | ||
150632b0 | 1233 | static int at91_pinctrl_probe(struct platform_device *pdev) |
6732ae5c JCPV |
1234 | { |
1235 | struct at91_pinctrl *info; | |
1236 | struct pinctrl_pin_desc *pdesc; | |
a0b957f3 | 1237 | int ret, i, j, k, ngpio_chips_enabled = 0; |
6732ae5c JCPV |
1238 | |
1239 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); | |
1240 | if (!info) | |
1241 | return -ENOMEM; | |
1242 | ||
1243 | ret = at91_pinctrl_probe_dt(pdev, info); | |
1244 | if (ret) | |
1245 | return ret; | |
1246 | ||
1247 | /* | |
1248 | * We need all the GPIO drivers to probe FIRST, or we will not be able | |
1249 | * to obtain references to the struct gpio_chip * for them, and we | |
1250 | * need this to proceed. | |
1251 | */ | |
a0b957f3 JCPV |
1252 | for (i = 0; i < gpio_banks; i++) |
1253 | if (gpio_chips[i]) | |
1254 | ngpio_chips_enabled++; | |
1255 | ||
1256 | if (ngpio_chips_enabled < info->nactive_banks) { | |
1257 | dev_warn(&pdev->dev, | |
1258 | "All GPIO chips are not registered yet (%d/%d)\n", | |
1259 | ngpio_chips_enabled, info->nactive_banks); | |
1260 | devm_kfree(&pdev->dev, info); | |
1261 | return -EPROBE_DEFER; | |
6732ae5c JCPV |
1262 | } |
1263 | ||
1264 | at91_pinctrl_desc.name = dev_name(&pdev->dev); | |
a0b957f3 | 1265 | at91_pinctrl_desc.npins = gpio_banks * MAX_NB_GPIO_PER_BANK; |
6732ae5c | 1266 | at91_pinctrl_desc.pins = pdesc = |
a86854d0 KC |
1267 | devm_kcalloc(&pdev->dev, |
1268 | at91_pinctrl_desc.npins, sizeof(*pdesc), | |
1269 | GFP_KERNEL); | |
6732ae5c JCPV |
1270 | |
1271 | if (!at91_pinctrl_desc.pins) | |
1272 | return -ENOMEM; | |
1273 | ||
a0b957f3 | 1274 | for (i = 0, k = 0; i < gpio_banks; i++) { |
6732ae5c JCPV |
1275 | for (j = 0; j < MAX_NB_GPIO_PER_BANK; j++, k++) { |
1276 | pdesc->number = k; | |
1277 | pdesc->name = kasprintf(GFP_KERNEL, "pio%c%d", i + 'A', j); | |
1278 | pdesc++; | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | platform_set_drvdata(pdev, info); | |
5c67425a LD |
1283 | info->pctl = devm_pinctrl_register(&pdev->dev, &at91_pinctrl_desc, |
1284 | info); | |
6732ae5c | 1285 | |
323de9ef | 1286 | if (IS_ERR(info->pctl)) { |
6732ae5c | 1287 | dev_err(&pdev->dev, "could not register AT91 pinctrl driver\n"); |
323de9ef | 1288 | return PTR_ERR(info->pctl); |
6732ae5c JCPV |
1289 | } |
1290 | ||
1291 | /* We will handle a range of GPIO pins */ | |
a0b957f3 JCPV |
1292 | for (i = 0; i < gpio_banks; i++) |
1293 | if (gpio_chips[i]) | |
1294 | pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range); | |
6732ae5c JCPV |
1295 | |
1296 | dev_info(&pdev->dev, "initialized AT91 pinctrl driver\n"); | |
1297 | ||
1298 | return 0; | |
6732ae5c JCPV |
1299 | } |
1300 | ||
8af584b8 RG |
1301 | static int at91_gpio_get_direction(struct gpio_chip *chip, unsigned offset) |
1302 | { | |
370ea611 | 1303 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
8af584b8 RG |
1304 | void __iomem *pio = at91_gpio->regbase; |
1305 | unsigned mask = 1 << offset; | |
1306 | u32 osr; | |
1307 | ||
1308 | osr = readl_relaxed(pio + PIO_OSR); | |
1309 | return !(osr & mask); | |
1310 | } | |
1311 | ||
6732ae5c JCPV |
1312 | static int at91_gpio_direction_input(struct gpio_chip *chip, unsigned offset) |
1313 | { | |
370ea611 | 1314 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
6732ae5c JCPV |
1315 | void __iomem *pio = at91_gpio->regbase; |
1316 | unsigned mask = 1 << offset; | |
1317 | ||
1318 | writel_relaxed(mask, pio + PIO_ODR); | |
1319 | return 0; | |
1320 | } | |
1321 | ||
1322 | static int at91_gpio_get(struct gpio_chip *chip, unsigned offset) | |
1323 | { | |
370ea611 | 1324 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
6732ae5c JCPV |
1325 | void __iomem *pio = at91_gpio->regbase; |
1326 | unsigned mask = 1 << offset; | |
1327 | u32 pdsr; | |
1328 | ||
1329 | pdsr = readl_relaxed(pio + PIO_PDSR); | |
1330 | return (pdsr & mask) != 0; | |
1331 | } | |
1332 | ||
1333 | static void at91_gpio_set(struct gpio_chip *chip, unsigned offset, | |
1334 | int val) | |
1335 | { | |
370ea611 | 1336 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
6732ae5c JCPV |
1337 | void __iomem *pio = at91_gpio->regbase; |
1338 | unsigned mask = 1 << offset; | |
1339 | ||
1340 | writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR)); | |
1341 | } | |
1342 | ||
1893b2cf AS |
1343 | static void at91_gpio_set_multiple(struct gpio_chip *chip, |
1344 | unsigned long *mask, unsigned long *bits) | |
1345 | { | |
370ea611 | 1346 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
1893b2cf AS |
1347 | void __iomem *pio = at91_gpio->regbase; |
1348 | ||
1349 | #define BITS_MASK(bits) (((bits) == 32) ? ~0U : (BIT(bits) - 1)) | |
1350 | /* Mask additionally to ngpio as not all GPIO controllers have 32 pins */ | |
1351 | uint32_t set_mask = (*mask & *bits) & BITS_MASK(chip->ngpio); | |
1352 | uint32_t clear_mask = (*mask & ~(*bits)) & BITS_MASK(chip->ngpio); | |
1353 | ||
1354 | writel_relaxed(set_mask, pio + PIO_SODR); | |
1355 | writel_relaxed(clear_mask, pio + PIO_CODR); | |
1356 | } | |
1357 | ||
6732ae5c JCPV |
1358 | static int at91_gpio_direction_output(struct gpio_chip *chip, unsigned offset, |
1359 | int val) | |
1360 | { | |
370ea611 | 1361 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
6732ae5c JCPV |
1362 | void __iomem *pio = at91_gpio->regbase; |
1363 | unsigned mask = 1 << offset; | |
1364 | ||
1365 | writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR)); | |
1366 | writel_relaxed(mask, pio + PIO_OER); | |
1367 | ||
1368 | return 0; | |
1369 | } | |
1370 | ||
6732ae5c JCPV |
1371 | #ifdef CONFIG_DEBUG_FS |
1372 | static void at91_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) | |
1373 | { | |
1374 | enum at91_mux mode; | |
1375 | int i; | |
370ea611 | 1376 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(chip); |
6732ae5c JCPV |
1377 | void __iomem *pio = at91_gpio->regbase; |
1378 | ||
1379 | for (i = 0; i < chip->ngpio; i++) { | |
47f22716 | 1380 | unsigned mask = pin_to_mask(i); |
6732ae5c | 1381 | const char *gpio_label; |
6732ae5c JCPV |
1382 | |
1383 | gpio_label = gpiochip_is_requested(chip, i); | |
1384 | if (!gpio_label) | |
1385 | continue; | |
1386 | mode = at91_gpio->ops->get_periph(pio, mask); | |
1387 | seq_printf(s, "[%s] GPIO%s%d: ", | |
1388 | gpio_label, chip->label, i); | |
1389 | if (mode == AT91_MUX_GPIO) { | |
853b6bf0 MC |
1390 | seq_printf(s, "[gpio] "); |
1391 | seq_printf(s, "%s ", | |
1392 | readl_relaxed(pio + PIO_OSR) & mask ? | |
1393 | "output" : "input"); | |
1394 | seq_printf(s, "%s\n", | |
1395 | readl_relaxed(pio + PIO_PDSR) & mask ? | |
1396 | "set" : "clear"); | |
6732ae5c JCPV |
1397 | } else { |
1398 | seq_printf(s, "[periph %c]\n", | |
1399 | mode + 'A' - 1); | |
1400 | } | |
1401 | } | |
1402 | } | |
1403 | #else | |
1404 | #define at91_gpio_dbg_show NULL | |
1405 | #endif | |
1406 | ||
1407 | /* Several AIC controller irqs are dispatched through this GPIO handler. | |
1408 | * To use any AT91_PIN_* as an externally triggered IRQ, first call | |
1409 | * at91_set_gpio_input() then maybe enable its glitch filter. | |
1410 | * Then just request_irq() with the pin ID; it works like any ARM IRQ | |
1411 | * handler. | |
1412 | * First implementation always triggers on rising and falling edges | |
1413 | * whereas the newer PIO3 can be additionally configured to trigger on | |
1414 | * level, edge with any polarity. | |
1415 | * | |
1416 | * Alternatively, certain pins may be used directly as IRQ0..IRQ6 after | |
1417 | * configuring them with at91_set_a_periph() or at91_set_b_periph(). | |
1418 | * IRQ0..IRQ6 should be configurable, e.g. level vs edge triggering. | |
1419 | */ | |
1420 | ||
1421 | static void gpio_irq_mask(struct irq_data *d) | |
1422 | { | |
1423 | struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d); | |
1424 | void __iomem *pio = at91_gpio->regbase; | |
1425 | unsigned mask = 1 << d->hwirq; | |
1426 | ||
1427 | if (pio) | |
1428 | writel_relaxed(mask, pio + PIO_IDR); | |
1429 | } | |
1430 | ||
1431 | static void gpio_irq_unmask(struct irq_data *d) | |
1432 | { | |
1433 | struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d); | |
1434 | void __iomem *pio = at91_gpio->regbase; | |
1435 | unsigned mask = 1 << d->hwirq; | |
1436 | ||
1437 | if (pio) | |
1438 | writel_relaxed(mask, pio + PIO_IER); | |
1439 | } | |
1440 | ||
1441 | static int gpio_irq_type(struct irq_data *d, unsigned type) | |
1442 | { | |
1443 | switch (type) { | |
1444 | case IRQ_TYPE_NONE: | |
1445 | case IRQ_TYPE_EDGE_BOTH: | |
1446 | return 0; | |
1447 | default: | |
1448 | return -EINVAL; | |
1449 | } | |
1450 | } | |
1451 | ||
1452 | /* Alternate irq type for PIO3 support */ | |
1453 | static int alt_gpio_irq_type(struct irq_data *d, unsigned type) | |
1454 | { | |
1455 | struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d); | |
1456 | void __iomem *pio = at91_gpio->regbase; | |
1457 | unsigned mask = 1 << d->hwirq; | |
1458 | ||
1459 | switch (type) { | |
1460 | case IRQ_TYPE_EDGE_RISING: | |
c639845b | 1461 | irq_set_handler_locked(d, handle_simple_irq); |
6732ae5c JCPV |
1462 | writel_relaxed(mask, pio + PIO_ESR); |
1463 | writel_relaxed(mask, pio + PIO_REHLSR); | |
1464 | break; | |
1465 | case IRQ_TYPE_EDGE_FALLING: | |
c639845b | 1466 | irq_set_handler_locked(d, handle_simple_irq); |
6732ae5c JCPV |
1467 | writel_relaxed(mask, pio + PIO_ESR); |
1468 | writel_relaxed(mask, pio + PIO_FELLSR); | |
1469 | break; | |
1470 | case IRQ_TYPE_LEVEL_LOW: | |
c639845b | 1471 | irq_set_handler_locked(d, handle_level_irq); |
6732ae5c JCPV |
1472 | writel_relaxed(mask, pio + PIO_LSR); |
1473 | writel_relaxed(mask, pio + PIO_FELLSR); | |
1474 | break; | |
1475 | case IRQ_TYPE_LEVEL_HIGH: | |
c639845b | 1476 | irq_set_handler_locked(d, handle_level_irq); |
6732ae5c JCPV |
1477 | writel_relaxed(mask, pio + PIO_LSR); |
1478 | writel_relaxed(mask, pio + PIO_REHLSR); | |
1479 | break; | |
1480 | case IRQ_TYPE_EDGE_BOTH: | |
1481 | /* | |
1482 | * disable additional interrupt modes: | |
1483 | * fall back to default behavior | |
1484 | */ | |
c639845b | 1485 | irq_set_handler_locked(d, handle_simple_irq); |
6732ae5c JCPV |
1486 | writel_relaxed(mask, pio + PIO_AIMDR); |
1487 | return 0; | |
1488 | case IRQ_TYPE_NONE: | |
1489 | default: | |
1c5fb66a | 1490 | pr_warn("AT91: No type for GPIO irq offset %d\n", d->irq); |
6732ae5c JCPV |
1491 | return -EINVAL; |
1492 | } | |
1493 | ||
1494 | /* enable additional interrupt modes */ | |
1495 | writel_relaxed(mask, pio + PIO_AIMER); | |
1496 | ||
1497 | return 0; | |
1498 | } | |
1499 | ||
80cc3732 AS |
1500 | static void gpio_irq_ack(struct irq_data *d) |
1501 | { | |
1502 | /* the interrupt is already cleared before by reading ISR */ | |
1503 | } | |
1504 | ||
6732ae5c | 1505 | #ifdef CONFIG_PM |
647f8d94 LD |
1506 | |
1507 | static u32 wakeups[MAX_GPIO_BANKS]; | |
1508 | static u32 backups[MAX_GPIO_BANKS]; | |
1509 | ||
6732ae5c JCPV |
1510 | static int gpio_irq_set_wake(struct irq_data *d, unsigned state) |
1511 | { | |
1512 | struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d); | |
1513 | unsigned bank = at91_gpio->pioc_idx; | |
647f8d94 | 1514 | unsigned mask = 1 << d->hwirq; |
6732ae5c JCPV |
1515 | |
1516 | if (unlikely(bank >= MAX_GPIO_BANKS)) | |
1517 | return -EINVAL; | |
1518 | ||
647f8d94 LD |
1519 | if (state) |
1520 | wakeups[bank] |= mask; | |
1521 | else | |
1522 | wakeups[bank] &= ~mask; | |
1523 | ||
6732ae5c JCPV |
1524 | irq_set_irq_wake(at91_gpio->pioc_virq, state); |
1525 | ||
1526 | return 0; | |
1527 | } | |
647f8d94 LD |
1528 | |
1529 | void at91_pinctrl_gpio_suspend(void) | |
1530 | { | |
1531 | int i; | |
1532 | ||
1533 | for (i = 0; i < gpio_banks; i++) { | |
1534 | void __iomem *pio; | |
1535 | ||
1536 | if (!gpio_chips[i]) | |
1537 | continue; | |
1538 | ||
1539 | pio = gpio_chips[i]->regbase; | |
1540 | ||
d480239b BD |
1541 | backups[i] = readl_relaxed(pio + PIO_IMR); |
1542 | writel_relaxed(backups[i], pio + PIO_IDR); | |
1543 | writel_relaxed(wakeups[i], pio + PIO_IER); | |
647f8d94 | 1544 | |
795f9953 BB |
1545 | if (!wakeups[i]) |
1546 | clk_disable_unprepare(gpio_chips[i]->clock); | |
1547 | else | |
647f8d94 LD |
1548 | printk(KERN_DEBUG "GPIO-%c may wake for %08x\n", |
1549 | 'A'+i, wakeups[i]); | |
647f8d94 LD |
1550 | } |
1551 | } | |
1552 | ||
1553 | void at91_pinctrl_gpio_resume(void) | |
1554 | { | |
1555 | int i; | |
1556 | ||
1557 | for (i = 0; i < gpio_banks; i++) { | |
1558 | void __iomem *pio; | |
1559 | ||
1560 | if (!gpio_chips[i]) | |
1561 | continue; | |
1562 | ||
1563 | pio = gpio_chips[i]->regbase; | |
1564 | ||
37ef1d92 BB |
1565 | if (!wakeups[i]) |
1566 | clk_prepare_enable(gpio_chips[i]->clock); | |
647f8d94 | 1567 | |
d480239b BD |
1568 | writel_relaxed(wakeups[i], pio + PIO_IDR); |
1569 | writel_relaxed(backups[i], pio + PIO_IER); | |
647f8d94 LD |
1570 | } |
1571 | } | |
1572 | ||
6732ae5c JCPV |
1573 | #else |
1574 | #define gpio_irq_set_wake NULL | |
647f8d94 | 1575 | #endif /* CONFIG_PM */ |
6732ae5c | 1576 | |
bd0b9ac4 | 1577 | static void gpio_irq_handler(struct irq_desc *desc) |
6732ae5c | 1578 | { |
5663bb27 | 1579 | struct irq_chip *chip = irq_desc_get_chip(desc); |
80cc3732 | 1580 | struct gpio_chip *gpio_chip = irq_desc_get_handler_data(desc); |
370ea611 | 1581 | struct at91_gpio_chip *at91_gpio = gpiochip_get_data(gpio_chip); |
6732ae5c JCPV |
1582 | void __iomem *pio = at91_gpio->regbase; |
1583 | unsigned long isr; | |
1584 | int n; | |
1585 | ||
1586 | chained_irq_enter(chip, desc); | |
1587 | for (;;) { | |
1588 | /* Reading ISR acks pending (edge triggered) GPIO interrupts. | |
c2eb9e7f | 1589 | * When there are none pending, we're finished unless we need |
6732ae5c JCPV |
1590 | * to process multiple banks (like ID_PIOCDE on sam9263). |
1591 | */ | |
1592 | isr = readl_relaxed(pio + PIO_ISR) & readl_relaxed(pio + PIO_IMR); | |
1593 | if (!isr) { | |
1594 | if (!at91_gpio->next) | |
1595 | break; | |
1596 | at91_gpio = at91_gpio->next; | |
1597 | pio = at91_gpio->regbase; | |
cccb0c3e | 1598 | gpio_chip = &at91_gpio->chip; |
6732ae5c JCPV |
1599 | continue; |
1600 | } | |
1601 | ||
05daa16a | 1602 | for_each_set_bit(n, &isr, BITS_PER_LONG) { |
80cc3732 | 1603 | generic_handle_irq(irq_find_mapping( |
f0fbe7bc | 1604 | gpio_chip->irq.domain, n)); |
6732ae5c JCPV |
1605 | } |
1606 | } | |
1607 | chained_irq_exit(chip, desc); | |
1608 | /* now it may re-trigger */ | |
1609 | } | |
1610 | ||
834e1678 | 1611 | static int at91_gpio_of_irq_setup(struct platform_device *pdev, |
6732ae5c JCPV |
1612 | struct at91_gpio_chip *at91_gpio) |
1613 | { | |
a0b957f3 | 1614 | struct gpio_chip *gpiochip_prev = NULL; |
cccb0c3e | 1615 | struct at91_gpio_chip *prev = NULL; |
6732ae5c | 1616 | struct irq_data *d = irq_get_irq_data(at91_gpio->pioc_virq); |
0c3dfa17 | 1617 | struct irq_chip *gpio_irqchip; |
a0b957f3 | 1618 | int ret, i; |
6732ae5c | 1619 | |
0c3dfa17 LD |
1620 | gpio_irqchip = devm_kzalloc(&pdev->dev, sizeof(*gpio_irqchip), GFP_KERNEL); |
1621 | if (!gpio_irqchip) | |
1622 | return -ENOMEM; | |
1623 | ||
6732ae5c JCPV |
1624 | at91_gpio->pioc_hwirq = irqd_to_hwirq(d); |
1625 | ||
0c3dfa17 LD |
1626 | gpio_irqchip->name = "GPIO"; |
1627 | gpio_irqchip->irq_ack = gpio_irq_ack; | |
1628 | gpio_irqchip->irq_disable = gpio_irq_mask; | |
1629 | gpio_irqchip->irq_mask = gpio_irq_mask; | |
1630 | gpio_irqchip->irq_unmask = gpio_irq_unmask; | |
1631 | gpio_irqchip->irq_set_wake = gpio_irq_set_wake, | |
1632 | gpio_irqchip->irq_set_type = at91_gpio->ops->irq_type; | |
6732ae5c JCPV |
1633 | |
1634 | /* Disable irqs of this PIO controller */ | |
1635 | writel_relaxed(~0, at91_gpio->regbase + PIO_IDR); | |
1636 | ||
80cc3732 AS |
1637 | /* |
1638 | * Let the generic code handle this edge IRQ, the the chained | |
1639 | * handler will perform the actual work of handling the parent | |
1640 | * interrupt. | |
1641 | */ | |
1642 | ret = gpiochip_irqchip_add(&at91_gpio->chip, | |
0c3dfa17 | 1643 | gpio_irqchip, |
80cc3732 AS |
1644 | 0, |
1645 | handle_edge_irq, | |
5803348c | 1646 | IRQ_TYPE_NONE); |
834e1678 PG |
1647 | if (ret) { |
1648 | dev_err(&pdev->dev, "at91_gpio.%d: Couldn't add irqchip to gpiochip.\n", | |
6732ae5c | 1649 | at91_gpio->pioc_idx); |
834e1678 PG |
1650 | return ret; |
1651 | } | |
6732ae5c | 1652 | |
cccb0c3e AS |
1653 | /* The top level handler handles one bank of GPIOs, except |
1654 | * on some SoC it can handle up to three... | |
1655 | * We only set up the handler for the first of the list. | |
1656 | */ | |
a0b957f3 JCPV |
1657 | gpiochip_prev = irq_get_handler_data(at91_gpio->pioc_virq); |
1658 | if (!gpiochip_prev) { | |
1659 | /* Then register the chain on the parent IRQ */ | |
1660 | gpiochip_set_chained_irqchip(&at91_gpio->chip, | |
0c3dfa17 | 1661 | gpio_irqchip, |
a0b957f3 JCPV |
1662 | at91_gpio->pioc_virq, |
1663 | gpio_irq_handler); | |
cccb0c3e | 1664 | return 0; |
a0b957f3 | 1665 | } |
cccb0c3e | 1666 | |
370ea611 | 1667 | prev = gpiochip_get_data(gpiochip_prev); |
6732ae5c | 1668 | |
a0b957f3 JCPV |
1669 | /* we can only have 2 banks before */ |
1670 | for (i = 0; i < 2; i++) { | |
1671 | if (prev->next) { | |
1672 | prev = prev->next; | |
1673 | } else { | |
1674 | prev->next = at91_gpio; | |
1675 | return 0; | |
1676 | } | |
1677 | } | |
1678 | ||
1679 | return -EINVAL; | |
6732ae5c JCPV |
1680 | } |
1681 | ||
1682 | /* This structure is replicated for each GPIO block allocated at probe time */ | |
234b6513 | 1683 | static const struct gpio_chip at91_gpio_template = { |
98c85d58 JG |
1684 | .request = gpiochip_generic_request, |
1685 | .free = gpiochip_generic_free, | |
8af584b8 | 1686 | .get_direction = at91_gpio_get_direction, |
6732ae5c JCPV |
1687 | .direction_input = at91_gpio_direction_input, |
1688 | .get = at91_gpio_get, | |
1689 | .direction_output = at91_gpio_direction_output, | |
1690 | .set = at91_gpio_set, | |
1893b2cf | 1691 | .set_multiple = at91_gpio_set_multiple, |
6732ae5c | 1692 | .dbg_show = at91_gpio_dbg_show, |
9fb1f39e | 1693 | .can_sleep = false, |
6732ae5c JCPV |
1694 | .ngpio = MAX_NB_GPIO_PER_BANK, |
1695 | }; | |
1696 | ||
baa9946e | 1697 | static const struct of_device_id at91_gpio_of_match[] = { |
6732ae5c JCPV |
1698 | { .compatible = "atmel,at91sam9x5-gpio", .data = &at91sam9x5_ops, }, |
1699 | { .compatible = "atmel,at91rm9200-gpio", .data = &at91rm9200_ops }, | |
1700 | { /* sentinel */ } | |
1701 | }; | |
1702 | ||
150632b0 | 1703 | static int at91_gpio_probe(struct platform_device *pdev) |
6732ae5c JCPV |
1704 | { |
1705 | struct device_node *np = pdev->dev.of_node; | |
1706 | struct resource *res; | |
1707 | struct at91_gpio_chip *at91_chip = NULL; | |
1708 | struct gpio_chip *chip; | |
1709 | struct pinctrl_gpio_range *range; | |
1710 | int ret = 0; | |
32b01a36 | 1711 | int irq, i; |
6732ae5c JCPV |
1712 | int alias_idx = of_alias_get_id(np, "gpio"); |
1713 | uint32_t ngpio; | |
32b01a36 | 1714 | char **names; |
6732ae5c JCPV |
1715 | |
1716 | BUG_ON(alias_idx >= ARRAY_SIZE(gpio_chips)); | |
1717 | if (gpio_chips[alias_idx]) { | |
1718 | ret = -EBUSY; | |
1719 | goto err; | |
1720 | } | |
1721 | ||
6732ae5c JCPV |
1722 | irq = platform_get_irq(pdev, 0); |
1723 | if (irq < 0) { | |
1724 | ret = irq; | |
1725 | goto err; | |
1726 | } | |
1727 | ||
1728 | at91_chip = devm_kzalloc(&pdev->dev, sizeof(*at91_chip), GFP_KERNEL); | |
1729 | if (!at91_chip) { | |
1730 | ret = -ENOMEM; | |
1731 | goto err; | |
1732 | } | |
1733 | ||
f50b9e12 | 1734 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
9e0c1fb2 TR |
1735 | at91_chip->regbase = devm_ioremap_resource(&pdev->dev, res); |
1736 | if (IS_ERR(at91_chip->regbase)) { | |
1737 | ret = PTR_ERR(at91_chip->regbase); | |
6732ae5c JCPV |
1738 | goto err; |
1739 | } | |
1740 | ||
3c93600d | 1741 | at91_chip->ops = (struct at91_pinctrl_mux_ops *) |
6732ae5c JCPV |
1742 | of_match_device(at91_gpio_of_match, &pdev->dev)->data; |
1743 | at91_chip->pioc_virq = irq; | |
1744 | at91_chip->pioc_idx = alias_idx; | |
1745 | ||
02b837ff | 1746 | at91_chip->clock = devm_clk_get(&pdev->dev, NULL); |
6732ae5c JCPV |
1747 | if (IS_ERR(at91_chip->clock)) { |
1748 | dev_err(&pdev->dev, "failed to get clock, ignoring.\n"); | |
70e41974 | 1749 | ret = PTR_ERR(at91_chip->clock); |
6732ae5c JCPV |
1750 | goto err; |
1751 | } | |
1752 | ||
7d3a3fe6 | 1753 | ret = clk_prepare_enable(at91_chip->clock); |
70e41974 | 1754 | if (ret) { |
7d3a3fe6 | 1755 | dev_err(&pdev->dev, "failed to prepare and enable clock, ignoring.\n"); |
70e41974 | 1756 | goto clk_enable_err; |
6732ae5c JCPV |
1757 | } |
1758 | ||
1759 | at91_chip->chip = at91_gpio_template; | |
1760 | ||
1761 | chip = &at91_chip->chip; | |
1762 | chip->of_node = np; | |
1763 | chip->label = dev_name(&pdev->dev); | |
58383c78 | 1764 | chip->parent = &pdev->dev; |
6732ae5c JCPV |
1765 | chip->owner = THIS_MODULE; |
1766 | chip->base = alias_idx * MAX_NB_GPIO_PER_BANK; | |
1767 | ||
1768 | if (!of_property_read_u32(np, "#gpio-lines", &ngpio)) { | |
1769 | if (ngpio >= MAX_NB_GPIO_PER_BANK) | |
1770 | pr_err("at91_gpio.%d, gpio-nb >= %d failback to %d\n", | |
1771 | alias_idx, MAX_NB_GPIO_PER_BANK, MAX_NB_GPIO_PER_BANK); | |
1772 | else | |
1773 | chip->ngpio = ngpio; | |
1774 | } | |
1775 | ||
a86854d0 | 1776 | names = devm_kcalloc(&pdev->dev, chip->ngpio, sizeof(char *), |
3c93600d | 1777 | GFP_KERNEL); |
32b01a36 JCPV |
1778 | |
1779 | if (!names) { | |
1780 | ret = -ENOMEM; | |
70e41974 | 1781 | goto clk_enable_err; |
32b01a36 JCPV |
1782 | } |
1783 | ||
1784 | for (i = 0; i < chip->ngpio; i++) | |
1785 | names[i] = kasprintf(GFP_KERNEL, "pio%c%d", alias_idx + 'A', i); | |
1786 | ||
3c93600d | 1787 | chip->names = (const char *const *)names; |
32b01a36 | 1788 | |
6732ae5c JCPV |
1789 | range = &at91_chip->range; |
1790 | range->name = chip->label; | |
1791 | range->id = alias_idx; | |
1792 | range->pin_base = range->base = range->id * MAX_NB_GPIO_PER_BANK; | |
1793 | ||
1794 | range->npins = chip->ngpio; | |
1795 | range->gc = chip; | |
1796 | ||
370ea611 | 1797 | ret = gpiochip_add_data(chip, at91_chip); |
6732ae5c | 1798 | if (ret) |
70e41974 | 1799 | goto gpiochip_add_err; |
6732ae5c JCPV |
1800 | |
1801 | gpio_chips[alias_idx] = at91_chip; | |
1802 | gpio_banks = max(gpio_banks, alias_idx + 1); | |
1803 | ||
834e1678 PG |
1804 | ret = at91_gpio_of_irq_setup(pdev, at91_chip); |
1805 | if (ret) | |
1806 | goto irq_setup_err; | |
6732ae5c JCPV |
1807 | |
1808 | dev_info(&pdev->dev, "at address %p\n", at91_chip->regbase); | |
1809 | ||
1810 | return 0; | |
1811 | ||
834e1678 PG |
1812 | irq_setup_err: |
1813 | gpiochip_remove(chip); | |
70e41974 | 1814 | gpiochip_add_err: |
70e41974 | 1815 | clk_enable_err: |
7d3a3fe6 | 1816 | clk_disable_unprepare(at91_chip->clock); |
6732ae5c JCPV |
1817 | err: |
1818 | dev_err(&pdev->dev, "Failure %i for GPIO %i\n", ret, alias_idx); | |
1819 | ||
1820 | return ret; | |
1821 | } | |
1822 | ||
1823 | static struct platform_driver at91_gpio_driver = { | |
1824 | .driver = { | |
1825 | .name = "gpio-at91", | |
606fca94 | 1826 | .of_match_table = at91_gpio_of_match, |
6732ae5c JCPV |
1827 | }, |
1828 | .probe = at91_gpio_probe, | |
1829 | }; | |
1830 | ||
1831 | static struct platform_driver at91_pinctrl_driver = { | |
1832 | .driver = { | |
1833 | .name = "pinctrl-at91", | |
606fca94 | 1834 | .of_match_table = at91_pinctrl_of_match, |
6732ae5c JCPV |
1835 | }, |
1836 | .probe = at91_pinctrl_probe, | |
6732ae5c JCPV |
1837 | }; |
1838 | ||
bab7f5a4 TR |
1839 | static struct platform_driver * const drivers[] = { |
1840 | &at91_gpio_driver, | |
1841 | &at91_pinctrl_driver, | |
1842 | }; | |
1843 | ||
6732ae5c JCPV |
1844 | static int __init at91_pinctrl_init(void) |
1845 | { | |
bab7f5a4 | 1846 | return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); |
6732ae5c JCPV |
1847 | } |
1848 | arch_initcall(at91_pinctrl_init); |