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