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1394f032 BW |
1 | /* |
2 | * File: arch/blackfin/kernel/bfin_gpio.c | |
3 | * Based on: | |
4 | * Author: Michael Hennerich (hennerich@blackfin.uclinux.org) | |
5 | * | |
6 | * Created: | |
7 | * Description: GPIO Abstraction Layer | |
8 | * | |
9 | * Modified: | |
d2b11a46 | 10 | * Copyright 2007 Analog Devices Inc. |
1394f032 BW |
11 | * |
12 | * Bugs: Enter bugs at http://blackfin.uclinux.org/ | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2 of the License, or | |
17 | * (at your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, see the file COPYING, or write | |
26 | * to the Free Software Foundation, Inc., | |
27 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
28 | */ | |
29 | ||
30 | /* | |
d2b11a46 | 31 | * Number BF537/6/4 BF561 BF533/2/1 BF549/8/4/2 |
1394f032 | 32 | * |
d2b11a46 | 33 | * GPIO_0 PF0 PF0 PF0 PA0...PJ13 |
1394f032 BW |
34 | * GPIO_1 PF1 PF1 PF1 |
35 | * GPIO_2 PF2 PF2 PF2 | |
36 | * GPIO_3 PF3 PF3 PF3 | |
37 | * GPIO_4 PF4 PF4 PF4 | |
38 | * GPIO_5 PF5 PF5 PF5 | |
39 | * GPIO_6 PF6 PF6 PF6 | |
40 | * GPIO_7 PF7 PF7 PF7 | |
41 | * GPIO_8 PF8 PF8 PF8 | |
42 | * GPIO_9 PF9 PF9 PF9 | |
43 | * GPIO_10 PF10 PF10 PF10 | |
44 | * GPIO_11 PF11 PF11 PF11 | |
45 | * GPIO_12 PF12 PF12 PF12 | |
46 | * GPIO_13 PF13 PF13 PF13 | |
47 | * GPIO_14 PF14 PF14 PF14 | |
48 | * GPIO_15 PF15 PF15 PF15 | |
49 | * GPIO_16 PG0 PF16 | |
50 | * GPIO_17 PG1 PF17 | |
51 | * GPIO_18 PG2 PF18 | |
52 | * GPIO_19 PG3 PF19 | |
53 | * GPIO_20 PG4 PF20 | |
54 | * GPIO_21 PG5 PF21 | |
55 | * GPIO_22 PG6 PF22 | |
56 | * GPIO_23 PG7 PF23 | |
57 | * GPIO_24 PG8 PF24 | |
58 | * GPIO_25 PG9 PF25 | |
59 | * GPIO_26 PG10 PF26 | |
60 | * GPIO_27 PG11 PF27 | |
61 | * GPIO_28 PG12 PF28 | |
62 | * GPIO_29 PG13 PF29 | |
63 | * GPIO_30 PG14 PF30 | |
64 | * GPIO_31 PG15 PF31 | |
65 | * GPIO_32 PH0 PF32 | |
66 | * GPIO_33 PH1 PF33 | |
67 | * GPIO_34 PH2 PF34 | |
68 | * GPIO_35 PH3 PF35 | |
69 | * GPIO_36 PH4 PF36 | |
70 | * GPIO_37 PH5 PF37 | |
71 | * GPIO_38 PH6 PF38 | |
72 | * GPIO_39 PH7 PF39 | |
73 | * GPIO_40 PH8 PF40 | |
74 | * GPIO_41 PH9 PF41 | |
75 | * GPIO_42 PH10 PF42 | |
76 | * GPIO_43 PH11 PF43 | |
77 | * GPIO_44 PH12 PF44 | |
78 | * GPIO_45 PH13 PF45 | |
79 | * GPIO_46 PH14 PF46 | |
80 | * GPIO_47 PH15 PF47 | |
81 | */ | |
82 | ||
168f1212 | 83 | #include <linux/delay.h> |
1394f032 BW |
84 | #include <linux/module.h> |
85 | #include <linux/err.h> | |
86 | #include <asm/blackfin.h> | |
87 | #include <asm/gpio.h> | |
c58c2140 | 88 | #include <asm/portmux.h> |
1394f032 BW |
89 | #include <linux/irq.h> |
90 | ||
91 | #ifdef BF533_FAMILY | |
92 | static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = { | |
93 | (struct gpio_port_t *) FIO_FLAG_D, | |
94 | }; | |
95 | #endif | |
96 | ||
97 | #ifdef BF537_FAMILY | |
98 | static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = { | |
99 | (struct gpio_port_t *) PORTFIO, | |
100 | (struct gpio_port_t *) PORTGIO, | |
101 | (struct gpio_port_t *) PORTHIO, | |
102 | }; | |
103 | ||
104 | static unsigned short *port_fer[gpio_bank(MAX_BLACKFIN_GPIOS)] = { | |
105 | (unsigned short *) PORTF_FER, | |
106 | (unsigned short *) PORTG_FER, | |
107 | (unsigned short *) PORTH_FER, | |
108 | }; | |
109 | ||
110 | #endif | |
111 | ||
112 | #ifdef BF561_FAMILY | |
113 | static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = { | |
114 | (struct gpio_port_t *) FIO0_FLAG_D, | |
115 | (struct gpio_port_t *) FIO1_FLAG_D, | |
116 | (struct gpio_port_t *) FIO2_FLAG_D, | |
117 | }; | |
118 | #endif | |
119 | ||
d2b11a46 MH |
120 | #ifdef BF548_FAMILY |
121 | static struct gpio_port_t *gpio_array[gpio_bank(MAX_BLACKFIN_GPIOS)] = { | |
122 | (struct gpio_port_t *)PORTA_FER, | |
123 | (struct gpio_port_t *)PORTB_FER, | |
124 | (struct gpio_port_t *)PORTC_FER, | |
125 | (struct gpio_port_t *)PORTD_FER, | |
126 | (struct gpio_port_t *)PORTE_FER, | |
127 | (struct gpio_port_t *)PORTF_FER, | |
128 | (struct gpio_port_t *)PORTG_FER, | |
129 | (struct gpio_port_t *)PORTH_FER, | |
130 | (struct gpio_port_t *)PORTI_FER, | |
131 | (struct gpio_port_t *)PORTJ_FER, | |
132 | }; | |
133 | #endif | |
134 | ||
c58c2140 MH |
135 | static unsigned short reserved_gpio_map[gpio_bank(MAX_BLACKFIN_GPIOS)]; |
136 | static unsigned short reserved_peri_map[gpio_bank(MAX_BLACKFIN_GPIOS + 16)]; | |
c58c2140 | 137 | |
8c613623 MH |
138 | #define MAX_RESOURCES 256 |
139 | #define RESOURCE_LABEL_SIZE 16 | |
140 | ||
141 | struct str_ident { | |
142 | char name[RESOURCE_LABEL_SIZE]; | |
143 | } *str_ident; | |
144 | ||
1394f032 BW |
145 | |
146 | #ifdef CONFIG_PM | |
147 | static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)]; | |
148 | static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS]; | |
149 | static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)]; | |
150 | ||
151 | #ifdef BF533_FAMILY | |
152 | static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB}; | |
153 | #endif | |
154 | ||
155 | #ifdef BF537_FAMILY | |
156 | static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX}; | |
157 | #endif | |
158 | ||
159 | #ifdef BF561_FAMILY | |
160 | static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB}; | |
161 | #endif | |
162 | ||
163 | #endif /* CONFIG_PM */ | |
164 | ||
d2b11a46 MH |
165 | #if defined(BF548_FAMILY) |
166 | inline int check_gpio(unsigned short gpio) | |
167 | { | |
168 | if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15 | |
169 | || gpio == GPIO_PH14 || gpio == GPIO_PH15 | |
170 | || gpio == GPIO_PJ14 || gpio == GPIO_PJ15 | |
171 | || gpio > MAX_BLACKFIN_GPIOS) | |
172 | return -EINVAL; | |
173 | return 0; | |
174 | } | |
175 | #else | |
1394f032 BW |
176 | inline int check_gpio(unsigned short gpio) |
177 | { | |
e7613aab | 178 | if (gpio >= MAX_BLACKFIN_GPIOS) |
1394f032 BW |
179 | return -EINVAL; |
180 | return 0; | |
181 | } | |
d2b11a46 | 182 | #endif |
1394f032 | 183 | |
c58c2140 MH |
184 | static void set_label(unsigned short ident, const char *label) |
185 | { | |
186 | ||
187 | if (label && str_ident) { | |
8c613623 | 188 | strncpy(str_ident[ident].name, label, |
c58c2140 | 189 | RESOURCE_LABEL_SIZE); |
8c613623 | 190 | str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0; |
c58c2140 MH |
191 | } |
192 | } | |
193 | ||
194 | static char *get_label(unsigned short ident) | |
195 | { | |
196 | if (!str_ident) | |
197 | return "UNKNOWN"; | |
198 | ||
8c613623 | 199 | return (*str_ident[ident].name ? str_ident[ident].name : "UNKNOWN"); |
c58c2140 MH |
200 | } |
201 | ||
202 | static int cmp_label(unsigned short ident, const char *label) | |
203 | { | |
204 | if (label && str_ident) | |
8c613623 | 205 | return strncmp(str_ident[ident].name, |
c58c2140 MH |
206 | label, strlen(label)); |
207 | else | |
208 | return -EINVAL; | |
209 | } | |
210 | ||
1394f032 | 211 | #ifdef BF537_FAMILY |
a161bb05 | 212 | static void port_setup(unsigned short gpio, unsigned short usage) |
1394f032 | 213 | { |
cda6a20b | 214 | if (!check_gpio(gpio)) { |
d2b11a46 | 215 | if (usage == GPIO_USAGE) |
cda6a20b | 216 | *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio); |
d2b11a46 | 217 | else |
cda6a20b MH |
218 | *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio); |
219 | SSYNC(); | |
220 | } | |
1394f032 | 221 | } |
d2b11a46 MH |
222 | #elif defined(BF548_FAMILY) |
223 | static void port_setup(unsigned short gpio, unsigned short usage) | |
224 | { | |
225 | if (usage == GPIO_USAGE) | |
226 | gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio); | |
227 | else | |
228 | gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio); | |
229 | SSYNC(); | |
230 | } | |
1394f032 BW |
231 | #else |
232 | # define port_setup(...) do { } while (0) | |
233 | #endif | |
234 | ||
c58c2140 | 235 | #ifdef BF537_FAMILY |
8c613623 MH |
236 | static struct { |
237 | unsigned short res; | |
238 | unsigned short offset; | |
239 | } port_mux_lut[] = { | |
240 | {.res = P_PPI0_D13, .offset = 11}, | |
241 | {.res = P_PPI0_D14, .offset = 11}, | |
242 | {.res = P_PPI0_D15, .offset = 11}, | |
243 | {.res = P_SPORT1_TFS, .offset = 11}, | |
244 | {.res = P_SPORT1_TSCLK, .offset = 11}, | |
245 | {.res = P_SPORT1_DTPRI, .offset = 11}, | |
246 | {.res = P_PPI0_D10, .offset = 10}, | |
247 | {.res = P_PPI0_D11, .offset = 10}, | |
248 | {.res = P_PPI0_D12, .offset = 10}, | |
249 | {.res = P_SPORT1_RSCLK, .offset = 10}, | |
250 | {.res = P_SPORT1_RFS, .offset = 10}, | |
251 | {.res = P_SPORT1_DRPRI, .offset = 10}, | |
252 | {.res = P_PPI0_D8, .offset = 9}, | |
253 | {.res = P_PPI0_D9, .offset = 9}, | |
254 | {.res = P_SPORT1_DRSEC, .offset = 9}, | |
255 | {.res = P_SPORT1_DTSEC, .offset = 9}, | |
256 | {.res = P_TMR2, .offset = 8}, | |
257 | {.res = P_PPI0_FS3, .offset = 8}, | |
258 | {.res = P_TMR3, .offset = 7}, | |
259 | {.res = P_SPI0_SSEL4, .offset = 7}, | |
260 | {.res = P_TMR4, .offset = 6}, | |
261 | {.res = P_SPI0_SSEL5, .offset = 6}, | |
262 | {.res = P_TMR5, .offset = 5}, | |
263 | {.res = P_SPI0_SSEL6, .offset = 5}, | |
264 | {.res = P_UART1_RX, .offset = 4}, | |
265 | {.res = P_UART1_TX, .offset = 4}, | |
266 | {.res = P_TMR6, .offset = 4}, | |
267 | {.res = P_TMR7, .offset = 4}, | |
268 | {.res = P_UART0_RX, .offset = 3}, | |
269 | {.res = P_UART0_TX, .offset = 3}, | |
270 | {.res = P_DMAR0, .offset = 3}, | |
271 | {.res = P_DMAR1, .offset = 3}, | |
272 | {.res = P_SPORT0_DTSEC, .offset = 1}, | |
273 | {.res = P_SPORT0_DRSEC, .offset = 1}, | |
274 | {.res = P_CAN0_RX, .offset = 1}, | |
275 | {.res = P_CAN0_TX, .offset = 1}, | |
276 | {.res = P_SPI0_SSEL7, .offset = 1}, | |
277 | {.res = P_SPORT0_TFS, .offset = 0}, | |
278 | {.res = P_SPORT0_DTPRI, .offset = 0}, | |
279 | {.res = P_SPI0_SSEL2, .offset = 0}, | |
280 | {.res = P_SPI0_SSEL3, .offset = 0}, | |
c58c2140 MH |
281 | }; |
282 | ||
283 | static void portmux_setup(unsigned short per, unsigned short function) | |
284 | { | |
8c613623 | 285 | u16 y, offset, muxreg; |
c58c2140 | 286 | |
8c613623 MH |
287 | for (y = 0; y < ARRAY_SIZE(port_mux_lut); y++) { |
288 | if (port_mux_lut[y].res == per) { | |
c58c2140 MH |
289 | |
290 | /* SET PORTMUX REG */ | |
291 | ||
8c613623 | 292 | offset = port_mux_lut[y].offset; |
c58c2140 MH |
293 | muxreg = bfin_read_PORT_MUX(); |
294 | ||
295 | if (offset != 1) { | |
296 | muxreg &= ~(1 << offset); | |
297 | } else { | |
298 | muxreg &= ~(3 << 1); | |
299 | } | |
300 | ||
301 | muxreg |= (function << offset); | |
302 | bfin_write_PORT_MUX(muxreg); | |
303 | } | |
304 | } | |
305 | } | |
d2b11a46 MH |
306 | #elif defined(BF548_FAMILY) |
307 | inline void portmux_setup(unsigned short portno, unsigned short function) | |
308 | { | |
309 | u32 pmux; | |
310 | ||
311 | pmux = gpio_array[gpio_bank(portno)]->port_mux; | |
312 | ||
313 | pmux &= ~(0x3 << (2 * gpio_sub_n(portno))); | |
314 | pmux |= (function & 0x3) << (2 * gpio_sub_n(portno)); | |
315 | ||
316 | gpio_array[gpio_bank(portno)]->port_mux = pmux; | |
317 | } | |
318 | ||
319 | inline u16 get_portmux(unsigned short portno) | |
320 | { | |
321 | u32 pmux; | |
c58c2140 | 322 | |
d2b11a46 MH |
323 | pmux = gpio_array[gpio_bank(portno)]->port_mux; |
324 | ||
325 | return (pmux >> (2 * gpio_sub_n(portno)) & 0x3); | |
326 | } | |
c58c2140 MH |
327 | #else |
328 | # define portmux_setup(...) do { } while (0) | |
329 | #endif | |
1394f032 | 330 | |
d2b11a46 | 331 | #ifndef BF548_FAMILY |
a161bb05 | 332 | static void default_gpio(unsigned short gpio) |
1394f032 | 333 | { |
1f83b8f1 | 334 | unsigned short bank, bitmask; |
1394f032 BW |
335 | |
336 | bank = gpio_bank(gpio); | |
337 | bitmask = gpio_bit(gpio); | |
338 | ||
339 | gpio_bankb[bank]->maska_clear = bitmask; | |
340 | gpio_bankb[bank]->maskb_clear = bitmask; | |
341 | SSYNC(); | |
342 | gpio_bankb[bank]->inen &= ~bitmask; | |
343 | gpio_bankb[bank]->dir &= ~bitmask; | |
344 | gpio_bankb[bank]->polar &= ~bitmask; | |
345 | gpio_bankb[bank]->both &= ~bitmask; | |
346 | gpio_bankb[bank]->edge &= ~bitmask; | |
347 | } | |
d2b11a46 MH |
348 | #else |
349 | # define default_gpio(...) do { } while (0) | |
350 | #endif | |
1394f032 | 351 | |
a161bb05 | 352 | static int __init bfin_gpio_init(void) |
1394f032 | 353 | { |
8c613623 MH |
354 | str_ident = kcalloc(MAX_RESOURCES, |
355 | sizeof(struct str_ident), GFP_KERNEL); | |
356 | if (str_ident == NULL) | |
c58c2140 | 357 | return -ENOMEM; |
1394f032 | 358 | |
8c613623 MH |
359 | memset(str_ident, 0, MAX_RESOURCES * sizeof(struct str_ident)); |
360 | ||
c58c2140 | 361 | printk(KERN_INFO "Blackfin GPIO Controller\n"); |
1394f032 BW |
362 | |
363 | return 0; | |
c58c2140 | 364 | |
1394f032 | 365 | } |
1394f032 BW |
366 | arch_initcall(bfin_gpio_init); |
367 | ||
368 | ||
d2b11a46 | 369 | #ifndef BF548_FAMILY |
1394f032 BW |
370 | /*********************************************************** |
371 | * | |
372 | * FUNCTIONS: Blackfin General Purpose Ports Access Functions | |
373 | * | |
374 | * INPUTS/OUTPUTS: | |
375 | * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS | |
376 | * | |
377 | * | |
378 | * DESCRIPTION: These functions abstract direct register access | |
379 | * to Blackfin processor General Purpose | |
380 | * Ports Regsiters | |
381 | * | |
382 | * CAUTION: These functions do not belong to the GPIO Driver API | |
383 | ************************************************************* | |
384 | * MODIFICATION HISTORY : | |
385 | **************************************************************/ | |
386 | ||
387 | /* Set a specific bit */ | |
388 | ||
389 | #define SET_GPIO(name) \ | |
390 | void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \ | |
391 | { \ | |
392 | unsigned long flags; \ | |
c58c2140 | 393 | BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); \ |
1394f032 BW |
394 | local_irq_save(flags); \ |
395 | if (arg) \ | |
396 | gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \ | |
397 | else \ | |
398 | gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \ | |
399 | local_irq_restore(flags); \ | |
400 | } \ | |
401 | EXPORT_SYMBOL(set_gpio_ ## name); | |
402 | ||
403 | SET_GPIO(dir) | |
404 | SET_GPIO(inen) | |
405 | SET_GPIO(polar) | |
406 | SET_GPIO(edge) | |
407 | SET_GPIO(both) | |
408 | ||
409 | ||
410 | #define SET_GPIO_SC(name) \ | |
411 | void set_gpio_ ## name(unsigned short gpio, unsigned short arg) \ | |
412 | { \ | |
c58c2140 | 413 | BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); \ |
1394f032 BW |
414 | if (arg) \ |
415 | gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \ | |
416 | else \ | |
417 | gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \ | |
418 | } \ | |
419 | EXPORT_SYMBOL(set_gpio_ ## name); | |
420 | ||
421 | SET_GPIO_SC(maska) | |
422 | SET_GPIO_SC(maskb) | |
423 | ||
1aafd909 | 424 | #if ANOMALY_05000311 |
1394f032 BW |
425 | void set_gpio_data(unsigned short gpio, unsigned short arg) |
426 | { | |
427 | unsigned long flags; | |
c58c2140 | 428 | BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); |
1394f032 BW |
429 | local_irq_save(flags); |
430 | if (arg) | |
431 | gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio); | |
432 | else | |
433 | gpio_bankb[gpio_bank(gpio)]->data_clear = gpio_bit(gpio); | |
434 | bfin_read_CHIPID(); | |
435 | local_irq_restore(flags); | |
436 | } | |
437 | EXPORT_SYMBOL(set_gpio_data); | |
438 | #else | |
439 | SET_GPIO_SC(data) | |
440 | #endif | |
441 | ||
442 | ||
1aafd909 | 443 | #if ANOMALY_05000311 |
1394f032 BW |
444 | void set_gpio_toggle(unsigned short gpio) |
445 | { | |
446 | unsigned long flags; | |
c58c2140 | 447 | BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); |
1394f032 BW |
448 | local_irq_save(flags); |
449 | gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio); | |
450 | bfin_read_CHIPID(); | |
451 | local_irq_restore(flags); | |
452 | } | |
453 | #else | |
454 | void set_gpio_toggle(unsigned short gpio) | |
455 | { | |
c58c2140 | 456 | BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); |
1394f032 BW |
457 | gpio_bankb[gpio_bank(gpio)]->toggle = gpio_bit(gpio); |
458 | } | |
459 | #endif | |
460 | EXPORT_SYMBOL(set_gpio_toggle); | |
461 | ||
462 | ||
463 | /*Set current PORT date (16-bit word)*/ | |
464 | ||
465 | #define SET_GPIO_P(name) \ | |
466 | void set_gpiop_ ## name(unsigned short gpio, unsigned short arg) \ | |
467 | { \ | |
468 | gpio_bankb[gpio_bank(gpio)]->name = arg; \ | |
469 | } \ | |
470 | EXPORT_SYMBOL(set_gpiop_ ## name); | |
471 | ||
472 | SET_GPIO_P(dir) | |
473 | SET_GPIO_P(inen) | |
474 | SET_GPIO_P(polar) | |
475 | SET_GPIO_P(edge) | |
476 | SET_GPIO_P(both) | |
477 | SET_GPIO_P(maska) | |
478 | SET_GPIO_P(maskb) | |
479 | ||
480 | ||
1aafd909 | 481 | #if ANOMALY_05000311 |
1394f032 BW |
482 | void set_gpiop_data(unsigned short gpio, unsigned short arg) |
483 | { | |
484 | unsigned long flags; | |
485 | local_irq_save(flags); | |
486 | gpio_bankb[gpio_bank(gpio)]->data = arg; | |
487 | bfin_read_CHIPID(); | |
488 | local_irq_restore(flags); | |
489 | } | |
490 | EXPORT_SYMBOL(set_gpiop_data); | |
491 | #else | |
492 | SET_GPIO_P(data) | |
493 | #endif | |
494 | ||
495 | ||
496 | ||
497 | /* Get a specific bit */ | |
498 | ||
499 | #define GET_GPIO(name) \ | |
500 | unsigned short get_gpio_ ## name(unsigned short gpio) \ | |
501 | { \ | |
502 | return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \ | |
503 | } \ | |
504 | EXPORT_SYMBOL(get_gpio_ ## name); | |
505 | ||
506 | GET_GPIO(dir) | |
507 | GET_GPIO(inen) | |
508 | GET_GPIO(polar) | |
509 | GET_GPIO(edge) | |
510 | GET_GPIO(both) | |
511 | GET_GPIO(maska) | |
512 | GET_GPIO(maskb) | |
513 | ||
514 | ||
1aafd909 | 515 | #if ANOMALY_05000311 |
1394f032 BW |
516 | unsigned short get_gpio_data(unsigned short gpio) |
517 | { | |
518 | unsigned long flags; | |
519 | unsigned short ret; | |
c58c2140 | 520 | BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); |
1394f032 BW |
521 | local_irq_save(flags); |
522 | ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->data >> gpio_sub_n(gpio)); | |
523 | bfin_read_CHIPID(); | |
524 | local_irq_restore(flags); | |
525 | return ret; | |
526 | } | |
527 | EXPORT_SYMBOL(get_gpio_data); | |
528 | #else | |
529 | GET_GPIO(data) | |
530 | #endif | |
531 | ||
532 | /*Get current PORT date (16-bit word)*/ | |
533 | ||
534 | #define GET_GPIO_P(name) \ | |
535 | unsigned short get_gpiop_ ## name(unsigned short gpio) \ | |
536 | { \ | |
537 | return (gpio_bankb[gpio_bank(gpio)]->name);\ | |
538 | } \ | |
539 | EXPORT_SYMBOL(get_gpiop_ ## name); | |
540 | ||
541 | GET_GPIO_P(dir) | |
542 | GET_GPIO_P(inen) | |
543 | GET_GPIO_P(polar) | |
544 | GET_GPIO_P(edge) | |
545 | GET_GPIO_P(both) | |
546 | GET_GPIO_P(maska) | |
547 | GET_GPIO_P(maskb) | |
548 | ||
1aafd909 | 549 | #if ANOMALY_05000311 |
1394f032 BW |
550 | unsigned short get_gpiop_data(unsigned short gpio) |
551 | { | |
552 | unsigned long flags; | |
553 | unsigned short ret; | |
554 | local_irq_save(flags); | |
555 | ret = gpio_bankb[gpio_bank(gpio)]->data; | |
556 | bfin_read_CHIPID(); | |
557 | local_irq_restore(flags); | |
558 | return ret; | |
559 | } | |
560 | EXPORT_SYMBOL(get_gpiop_data); | |
561 | #else | |
562 | GET_GPIO_P(data) | |
563 | #endif | |
564 | ||
565 | #ifdef CONFIG_PM | |
566 | /*********************************************************** | |
567 | * | |
568 | * FUNCTIONS: Blackfin PM Setup API | |
569 | * | |
570 | * INPUTS/OUTPUTS: | |
571 | * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS | |
572 | * type - | |
573 | * PM_WAKE_RISING | |
574 | * PM_WAKE_FALLING | |
575 | * PM_WAKE_HIGH | |
576 | * PM_WAKE_LOW | |
577 | * PM_WAKE_BOTH_EDGES | |
578 | * | |
579 | * DESCRIPTION: Blackfin PM Driver API | |
580 | * | |
581 | * CAUTION: | |
582 | ************************************************************* | |
583 | * MODIFICATION HISTORY : | |
584 | **************************************************************/ | |
585 | int gpio_pm_wakeup_request(unsigned short gpio, unsigned char type) | |
586 | { | |
587 | unsigned long flags; | |
588 | ||
589 | if ((check_gpio(gpio) < 0) || !type) | |
590 | return -EINVAL; | |
591 | ||
592 | local_irq_save(flags); | |
593 | ||
594 | wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio); | |
595 | wakeup_flags_map[gpio] = type; | |
596 | local_irq_restore(flags); | |
597 | ||
598 | return 0; | |
599 | } | |
600 | EXPORT_SYMBOL(gpio_pm_wakeup_request); | |
601 | ||
602 | void gpio_pm_wakeup_free(unsigned short gpio) | |
603 | { | |
604 | unsigned long flags; | |
605 | ||
606 | if (check_gpio(gpio) < 0) | |
607 | return; | |
608 | ||
609 | local_irq_save(flags); | |
610 | ||
611 | wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio); | |
612 | ||
613 | local_irq_restore(flags); | |
614 | } | |
615 | EXPORT_SYMBOL(gpio_pm_wakeup_free); | |
616 | ||
617 | static int bfin_gpio_wakeup_type(unsigned short gpio, unsigned char type) | |
618 | { | |
619 | port_setup(gpio, GPIO_USAGE); | |
620 | set_gpio_dir(gpio, 0); | |
621 | set_gpio_inen(gpio, 1); | |
622 | ||
623 | if (type & (PM_WAKE_RISING | PM_WAKE_FALLING)) | |
624 | set_gpio_edge(gpio, 1); | |
625 | else | |
626 | set_gpio_edge(gpio, 0); | |
627 | ||
628 | if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES)) | |
629 | set_gpio_both(gpio, 1); | |
630 | else | |
631 | set_gpio_both(gpio, 0); | |
632 | ||
633 | if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW))) | |
634 | set_gpio_polar(gpio, 1); | |
635 | else | |
636 | set_gpio_polar(gpio, 0); | |
637 | ||
638 | SSYNC(); | |
639 | ||
640 | return 0; | |
641 | } | |
642 | ||
643 | u32 gpio_pm_setup(void) | |
644 | { | |
645 | u32 sic_iwr = 0; | |
646 | u16 bank, mask, i, gpio; | |
647 | ||
1f83b8f1 | 648 | for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) { |
1394f032 BW |
649 | mask = wakeup_map[gpio_bank(i)]; |
650 | bank = gpio_bank(i); | |
651 | ||
652 | gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb; | |
653 | gpio_bankb[bank]->maskb = 0; | |
654 | ||
655 | if (mask) { | |
656 | #ifdef BF537_FAMILY | |
657 | gpio_bank_saved[bank].fer = *port_fer[bank]; | |
658 | #endif | |
659 | gpio_bank_saved[bank].inen = gpio_bankb[bank]->inen; | |
660 | gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar; | |
661 | gpio_bank_saved[bank].dir = gpio_bankb[bank]->dir; | |
662 | gpio_bank_saved[bank].edge = gpio_bankb[bank]->edge; | |
663 | gpio_bank_saved[bank].both = gpio_bankb[bank]->both; | |
c58c2140 MH |
664 | gpio_bank_saved[bank].reserved = |
665 | reserved_gpio_map[bank]; | |
1394f032 BW |
666 | |
667 | gpio = i; | |
668 | ||
669 | while (mask) { | |
670 | if (mask & 1) { | |
c58c2140 | 671 | reserved_gpio_map[gpio_bank(gpio)] |= |
581d62ab MH |
672 | gpio_bit(gpio); |
673 | bfin_gpio_wakeup_type(gpio, | |
674 | wakeup_flags_map[gpio]); | |
1394f032 BW |
675 | set_gpio_data(gpio, 0); /*Clear*/ |
676 | } | |
677 | gpio++; | |
678 | mask >>= 1; | |
679 | } | |
680 | ||
581d62ab MH |
681 | sic_iwr |= 1 << |
682 | (sic_iwr_irqs[bank] - (IRQ_CORETMR + 1)); | |
1394f032 BW |
683 | gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)]; |
684 | } | |
685 | } | |
686 | ||
687 | if (sic_iwr) | |
688 | return sic_iwr; | |
689 | else | |
690 | return IWR_ENABLE_ALL; | |
691 | } | |
692 | ||
1394f032 BW |
693 | void gpio_pm_restore(void) |
694 | { | |
695 | u16 bank, mask, i; | |
696 | ||
1f83b8f1 | 697 | for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) { |
1394f032 BW |
698 | mask = wakeup_map[gpio_bank(i)]; |
699 | bank = gpio_bank(i); | |
700 | ||
701 | if (mask) { | |
702 | #ifdef BF537_FAMILY | |
703 | *port_fer[bank] = gpio_bank_saved[bank].fer; | |
704 | #endif | |
705 | gpio_bankb[bank]->inen = gpio_bank_saved[bank].inen; | |
706 | gpio_bankb[bank]->dir = gpio_bank_saved[bank].dir; | |
707 | gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar; | |
708 | gpio_bankb[bank]->edge = gpio_bank_saved[bank].edge; | |
709 | gpio_bankb[bank]->both = gpio_bank_saved[bank].both; | |
581d62ab | 710 | |
c58c2140 MH |
711 | reserved_gpio_map[bank] = |
712 | gpio_bank_saved[bank].reserved; | |
581d62ab | 713 | |
1394f032 BW |
714 | } |
715 | ||
716 | gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb; | |
717 | } | |
718 | } | |
719 | ||
720 | #endif | |
d2b11a46 | 721 | #endif /* BF548_FAMILY */ |
1394f032 | 722 | |
d2b11a46 MH |
723 | /*********************************************************** |
724 | * | |
725 | * FUNCTIONS: Blackfin Peripheral Resource Allocation | |
726 | * and PortMux Setup | |
727 | * | |
728 | * INPUTS/OUTPUTS: | |
729 | * per Peripheral Identifier | |
730 | * label String | |
731 | * | |
732 | * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API | |
733 | * | |
734 | * CAUTION: | |
735 | ************************************************************* | |
736 | * MODIFICATION HISTORY : | |
737 | **************************************************************/ | |
738 | ||
739 | #ifdef BF548_FAMILY | |
740 | int peripheral_request(unsigned short per, const char *label) | |
741 | { | |
742 | unsigned long flags; | |
743 | unsigned short ident = P_IDENT(per); | |
744 | ||
745 | /* | |
746 | * Don't cares are pins with only one dedicated function | |
747 | */ | |
c58c2140 | 748 | |
d2b11a46 MH |
749 | if (per & P_DONTCARE) |
750 | return 0; | |
751 | ||
752 | if (!(per & P_DEFINED)) | |
753 | return -ENODEV; | |
754 | ||
755 | if (check_gpio(ident) < 0) | |
756 | return -EINVAL; | |
c58c2140 | 757 | |
d2b11a46 MH |
758 | local_irq_save(flags); |
759 | ||
760 | if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { | |
761 | printk(KERN_ERR | |
762 | "%s: Peripheral %d is already reserved as GPIO by %s !\n", | |
763 | __FUNCTION__, ident, get_label(ident)); | |
764 | dump_stack(); | |
765 | local_irq_restore(flags); | |
766 | return -EBUSY; | |
767 | } | |
768 | ||
769 | if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) { | |
770 | ||
771 | u16 funct = get_portmux(ident); | |
772 | ||
773 | /* | |
774 | * Pin functions like AMC address strobes my | |
775 | * be requested and used by several drivers | |
776 | */ | |
777 | ||
778 | if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) { | |
779 | ||
780 | /* | |
781 | * Allow that the identical pin function can | |
782 | * be requested from the same driver twice | |
783 | */ | |
784 | ||
785 | if (cmp_label(ident, label) == 0) | |
786 | goto anyway; | |
787 | ||
788 | printk(KERN_ERR | |
789 | "%s: Peripheral %d function %d is already reserved by %s !\n", | |
790 | __FUNCTION__, ident, P_FUNCT2MUX(per), get_label(ident)); | |
791 | dump_stack(); | |
792 | local_irq_restore(flags); | |
793 | return -EBUSY; | |
794 | } | |
795 | } | |
796 | ||
797 | anyway: | |
798 | reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident); | |
799 | ||
800 | portmux_setup(ident, P_FUNCT2MUX(per)); | |
801 | port_setup(ident, PERIPHERAL_USAGE); | |
802 | ||
803 | local_irq_restore(flags); | |
804 | set_label(ident, label); | |
805 | ||
806 | return 0; | |
807 | } | |
808 | EXPORT_SYMBOL(peripheral_request); | |
809 | #else | |
c58c2140 MH |
810 | |
811 | int peripheral_request(unsigned short per, const char *label) | |
812 | { | |
813 | unsigned long flags; | |
814 | unsigned short ident = P_IDENT(per); | |
815 | ||
816 | /* | |
817 | * Don't cares are pins with only one dedicated function | |
818 | */ | |
819 | ||
820 | if (per & P_DONTCARE) | |
821 | return 0; | |
822 | ||
823 | if (!(per & P_DEFINED)) | |
824 | return -ENODEV; | |
825 | ||
c58c2140 MH |
826 | local_irq_save(flags); |
827 | ||
cda6a20b MH |
828 | if (!check_gpio(ident)) { |
829 | ||
c58c2140 MH |
830 | if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) { |
831 | printk(KERN_ERR | |
832 | "%s: Peripheral %d is already reserved as GPIO by %s !\n", | |
833 | __FUNCTION__, ident, get_label(ident)); | |
834 | dump_stack(); | |
835 | local_irq_restore(flags); | |
836 | return -EBUSY; | |
837 | } | |
838 | ||
cda6a20b MH |
839 | } |
840 | ||
c58c2140 MH |
841 | if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) { |
842 | ||
843 | /* | |
844 | * Pin functions like AMC address strobes my | |
845 | * be requested and used by several drivers | |
846 | */ | |
847 | ||
848 | if (!(per & P_MAYSHARE)) { | |
849 | ||
850 | /* | |
851 | * Allow that the identical pin function can | |
852 | * be requested from the same driver twice | |
853 | */ | |
854 | ||
855 | if (cmp_label(ident, label) == 0) | |
856 | goto anyway; | |
857 | ||
858 | printk(KERN_ERR | |
859 | "%s: Peripheral %d function %d is already" | |
8c613623 | 860 | " reserved by %s !\n", |
c58c2140 MH |
861 | __FUNCTION__, ident, P_FUNCT2MUX(per), |
862 | get_label(ident)); | |
863 | dump_stack(); | |
864 | local_irq_restore(flags); | |
865 | return -EBUSY; | |
866 | } | |
867 | ||
868 | } | |
869 | ||
870 | anyway: | |
c58c2140 MH |
871 | portmux_setup(per, P_FUNCT2MUX(per)); |
872 | ||
873 | port_setup(ident, PERIPHERAL_USAGE); | |
874 | ||
875 | reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident); | |
876 | local_irq_restore(flags); | |
877 | set_label(ident, label); | |
878 | ||
879 | return 0; | |
880 | } | |
881 | EXPORT_SYMBOL(peripheral_request); | |
d2b11a46 | 882 | #endif |
c58c2140 MH |
883 | |
884 | int peripheral_request_list(unsigned short per[], const char *label) | |
885 | { | |
886 | u16 cnt; | |
887 | int ret; | |
888 | ||
889 | for (cnt = 0; per[cnt] != 0; cnt++) { | |
314c98d5 | 890 | |
c58c2140 | 891 | ret = peripheral_request(per[cnt], label); |
314c98d5 MH |
892 | |
893 | if (ret < 0) { | |
894 | for ( ; cnt > 0; cnt--) { | |
895 | peripheral_free(per[cnt - 1]); | |
896 | } | |
897 | return ret; | |
898 | } | |
c58c2140 MH |
899 | } |
900 | ||
901 | return 0; | |
902 | } | |
903 | EXPORT_SYMBOL(peripheral_request_list); | |
904 | ||
905 | void peripheral_free(unsigned short per) | |
906 | { | |
907 | unsigned long flags; | |
908 | unsigned short ident = P_IDENT(per); | |
909 | ||
910 | if (per & P_DONTCARE) | |
911 | return; | |
912 | ||
913 | if (!(per & P_DEFINED)) | |
914 | return; | |
915 | ||
916 | if (check_gpio(ident) < 0) | |
917 | return; | |
918 | ||
919 | local_irq_save(flags); | |
920 | ||
921 | if (unlikely(!(reserved_peri_map[gpio_bank(ident)] | |
922 | & gpio_bit(ident)))) { | |
923 | local_irq_restore(flags); | |
924 | return; | |
925 | } | |
926 | ||
927 | if (!(per & P_MAYSHARE)) { | |
928 | port_setup(ident, GPIO_USAGE); | |
929 | } | |
930 | ||
931 | reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident); | |
932 | ||
2acde902 MH |
933 | set_label(ident, "free"); |
934 | ||
c58c2140 MH |
935 | local_irq_restore(flags); |
936 | } | |
937 | EXPORT_SYMBOL(peripheral_free); | |
938 | ||
939 | void peripheral_free_list(unsigned short per[]) | |
940 | { | |
941 | u16 cnt; | |
942 | ||
943 | for (cnt = 0; per[cnt] != 0; cnt++) { | |
944 | peripheral_free(per[cnt]); | |
945 | } | |
946 | ||
947 | } | |
948 | EXPORT_SYMBOL(peripheral_free_list); | |
949 | ||
1394f032 BW |
950 | /*********************************************************** |
951 | * | |
952 | * FUNCTIONS: Blackfin GPIO Driver | |
953 | * | |
954 | * INPUTS/OUTPUTS: | |
d2b11a46 MH |
955 | * gpio PIO Number between 0 and MAX_BLACKFIN_GPIOS |
956 | * label String | |
1394f032 BW |
957 | * |
958 | * DESCRIPTION: Blackfin GPIO Driver API | |
959 | * | |
960 | * CAUTION: | |
961 | ************************************************************* | |
962 | * MODIFICATION HISTORY : | |
963 | **************************************************************/ | |
964 | ||
965 | int gpio_request(unsigned short gpio, const char *label) | |
966 | { | |
967 | unsigned long flags; | |
968 | ||
969 | if (check_gpio(gpio) < 0) | |
970 | return -EINVAL; | |
971 | ||
972 | local_irq_save(flags); | |
973 | ||
2acde902 MH |
974 | /* |
975 | * Allow that the identical GPIO can | |
976 | * be requested from the same driver twice | |
977 | * Do nothing and return - | |
978 | */ | |
979 | ||
980 | if (cmp_label(gpio, label) == 0) { | |
981 | local_irq_restore(flags); | |
982 | return 0; | |
983 | } | |
984 | ||
c58c2140 | 985 | if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) { |
d2b11a46 MH |
986 | printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n", |
987 | gpio, get_label(gpio)); | |
988 | dump_stack(); | |
989 | local_irq_restore(flags); | |
990 | return -EBUSY; | |
991 | } | |
992 | if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) { | |
993 | printk(KERN_ERR | |
994 | "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n", | |
995 | gpio, get_label(gpio)); | |
1394f032 BW |
996 | dump_stack(); |
997 | local_irq_restore(flags); | |
998 | return -EBUSY; | |
999 | } | |
d2b11a46 | 1000 | |
c58c2140 | 1001 | reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio); |
1394f032 BW |
1002 | |
1003 | local_irq_restore(flags); | |
1004 | ||
1005 | port_setup(gpio, GPIO_USAGE); | |
d2b11a46 | 1006 | set_label(gpio, label); |
1394f032 BW |
1007 | |
1008 | return 0; | |
1009 | } | |
1010 | EXPORT_SYMBOL(gpio_request); | |
1011 | ||
1394f032 BW |
1012 | void gpio_free(unsigned short gpio) |
1013 | { | |
1014 | unsigned long flags; | |
1015 | ||
1016 | if (check_gpio(gpio) < 0) | |
1017 | return; | |
1018 | ||
1019 | local_irq_save(flags); | |
1020 | ||
c58c2140 | 1021 | if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) { |
1394f032 BW |
1022 | printk(KERN_ERR "bfin-gpio: GPIO %d wasn't reserved!\n", gpio); |
1023 | dump_stack(); | |
1024 | local_irq_restore(flags); | |
1025 | return; | |
1026 | } | |
1027 | ||
1028 | default_gpio(gpio); | |
1029 | ||
c58c2140 | 1030 | reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio); |
1394f032 | 1031 | |
2acde902 MH |
1032 | set_label(gpio, "free"); |
1033 | ||
1394f032 BW |
1034 | local_irq_restore(flags); |
1035 | } | |
1036 | EXPORT_SYMBOL(gpio_free); | |
1037 | ||
d2b11a46 MH |
1038 | #ifdef BF548_FAMILY |
1039 | void gpio_direction_input(unsigned short gpio) | |
1040 | { | |
1041 | unsigned long flags; | |
1042 | ||
1043 | BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); | |
1044 | ||
1045 | local_irq_save(flags); | |
1046 | gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio); | |
1047 | gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio); | |
1048 | local_irq_restore(flags); | |
1049 | } | |
1050 | EXPORT_SYMBOL(gpio_direction_input); | |
1051 | ||
1052 | void gpio_direction_output(unsigned short gpio) | |
1053 | { | |
1054 | unsigned long flags; | |
1055 | ||
1056 | BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); | |
1057 | ||
1058 | local_irq_save(flags); | |
1059 | gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio); | |
1060 | gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio); | |
1061 | local_irq_restore(flags); | |
1062 | } | |
1063 | EXPORT_SYMBOL(gpio_direction_output); | |
1064 | ||
1065 | void gpio_set_value(unsigned short gpio, unsigned short arg) | |
1066 | { | |
1067 | if (arg) | |
1068 | gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio); | |
1069 | else | |
1070 | gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio); | |
1071 | ||
1072 | } | |
1073 | EXPORT_SYMBOL(gpio_set_value); | |
1074 | ||
1075 | unsigned short gpio_get_value(unsigned short gpio) | |
1076 | { | |
1077 | return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio))); | |
1078 | } | |
1079 | EXPORT_SYMBOL(gpio_get_value); | |
1080 | ||
1081 | #else | |
1082 | ||
1394f032 BW |
1083 | void gpio_direction_input(unsigned short gpio) |
1084 | { | |
1085 | unsigned long flags; | |
1086 | ||
c58c2140 | 1087 | BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); |
1394f032 BW |
1088 | |
1089 | local_irq_save(flags); | |
1090 | gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio); | |
1091 | gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio); | |
1092 | local_irq_restore(flags); | |
1093 | } | |
1094 | EXPORT_SYMBOL(gpio_direction_input); | |
1095 | ||
1096 | void gpio_direction_output(unsigned short gpio) | |
1097 | { | |
1098 | unsigned long flags; | |
1099 | ||
c58c2140 | 1100 | BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))); |
1394f032 BW |
1101 | |
1102 | local_irq_save(flags); | |
1103 | gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio); | |
1104 | gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio); | |
1105 | local_irq_restore(flags); | |
1106 | } | |
1107 | EXPORT_SYMBOL(gpio_direction_output); | |
168f1212 MF |
1108 | |
1109 | /* If we are booting from SPI and our board lacks a strong enough pull up, | |
1110 | * the core can reset and execute the bootrom faster than the resistor can | |
1111 | * pull the signal logically high. To work around this (common) error in | |
1112 | * board design, we explicitly set the pin back to GPIO mode, force /CS | |
1113 | * high, and wait for the electrons to do their thing. | |
1114 | * | |
1115 | * This function only makes sense to be called from reset code, but it | |
1116 | * lives here as we need to force all the GPIO states w/out going through | |
1117 | * BUG() checks and such. | |
1118 | */ | |
1119 | void bfin_gpio_reset_spi0_ssel1(void) | |
1120 | { | |
4d5f4ed3 MH |
1121 | u16 gpio = P_IDENT(P_SPI0_SSEL1); |
1122 | ||
1123 | port_setup(gpio, GPIO_USAGE); | |
1124 | gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio); | |
168f1212 MF |
1125 | udelay(1); |
1126 | } | |
d2b11a46 MH |
1127 | |
1128 | #endif /*BF548_FAMILY */ |