2 * File: arch/blackfin/kernel/bfin_gpio.c
4 * Author: Michael Hennerich (hennerich@blackfin.uclinux.org)
7 * Description: GPIO Abstraction Layer
10 * Copyright 2008 Analog Devices Inc.
12 * Bugs: Enter bugs at http://blackfin.uclinux.org/
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.
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.
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
30 #include <linux/delay.h>
31 #include <linux/module.h>
32 #include <linux/err.h>
33 #include <linux/proc_fs.h>
34 #include <asm/blackfin.h>
36 #include <asm/portmux.h>
37 #include <linux/irq.h>
39 #if ANOMALY_05000311 || ANOMALY_05000323
42 AWA_data_clear = SYSCR,
45 AWA_maska = BFIN_UART_SCR,
46 AWA_maska_clear = BFIN_UART_SCR,
47 AWA_maska_set = BFIN_UART_SCR,
48 AWA_maska_toggle = BFIN_UART_SCR,
49 AWA_maskb = BFIN_UART_GCTL,
50 AWA_maskb_clear = BFIN_UART_GCTL,
51 AWA_maskb_set = BFIN_UART_GCTL,
52 AWA_maskb_toggle = BFIN_UART_GCTL,
53 AWA_dir = SPORT1_STAT,
54 AWA_polar = SPORT1_STAT,
55 AWA_edge = SPORT1_STAT,
56 AWA_both = SPORT1_STAT,
58 AWA_inen = TIMER_ENABLE,
59 #elif ANOMALY_05000323
60 AWA_inen = DMA1_1_CONFIG,
63 /* Anomaly Workaround */
64 #define AWA_DUMMY_READ(name) bfin_read16(AWA_ ## name)
66 #define AWA_DUMMY_READ(...) do { } while (0)
69 static struct gpio_port_t * const gpio_array[] = {
70 #if defined(BF533_FAMILY) || defined(BF538_FAMILY)
71 (struct gpio_port_t *) FIO_FLAG_D,
72 #elif defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
73 (struct gpio_port_t *) PORTFIO,
74 (struct gpio_port_t *) PORTGIO,
75 (struct gpio_port_t *) PORTHIO,
76 #elif defined(BF561_FAMILY)
77 (struct gpio_port_t *) FIO0_FLAG_D,
78 (struct gpio_port_t *) FIO1_FLAG_D,
79 (struct gpio_port_t *) FIO2_FLAG_D,
80 #elif defined(CONFIG_BF54x)
81 (struct gpio_port_t *)PORTA_FER,
82 (struct gpio_port_t *)PORTB_FER,
83 (struct gpio_port_t *)PORTC_FER,
84 (struct gpio_port_t *)PORTD_FER,
85 (struct gpio_port_t *)PORTE_FER,
86 (struct gpio_port_t *)PORTF_FER,
87 (struct gpio_port_t *)PORTG_FER,
88 (struct gpio_port_t *)PORTH_FER,
89 (struct gpio_port_t *)PORTI_FER,
90 (struct gpio_port_t *)PORTJ_FER,
92 # error no gpio arrays defined
96 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
97 static unsigned short * const port_fer[] = {
98 (unsigned short *) PORTF_FER,
99 (unsigned short *) PORTG_FER,
100 (unsigned short *) PORTH_FER,
103 # if !defined(BF537_FAMILY)
104 static unsigned short * const port_mux[] = {
105 (unsigned short *) PORTF_MUX,
106 (unsigned short *) PORTG_MUX,
107 (unsigned short *) PORTH_MUX,
111 u8 pmux_offset[][16] = {
112 # if defined(CONFIG_BF52x)
113 { 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 4, 6, 8, 8, 10, 10 }, /* PORTF */
114 { 0, 0, 0, 0, 0, 2, 2, 4, 4, 6, 8, 10, 10, 10, 12, 12 }, /* PORTG */
115 { 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 4, 4, 4, 4, 4 }, /* PORTH */
116 # elif defined(CONFIG_BF51x)
117 { 0, 2, 2, 2, 2, 2, 2, 4, 6, 6, 6, 8, 8, 8, 8, 10 }, /* PORTF */
118 { 0, 0, 0, 2, 4, 6, 6, 6, 8, 10, 10, 12, 14, 14, 14, 14 }, /* PORTG */
119 { 0, 0, 0, 0, 2, 2, 4, 6, 10, 10, 10, 10, 10, 10, 10, 10 }, /* PORTH */
126 static unsigned short reserved_gpio_map[GPIO_BANK_NUM];
127 static unsigned short reserved_peri_map[gpio_bank(MAX_RESOURCES)];
128 static unsigned short reserved_gpio_irq_map[GPIO_BANK_NUM];
130 #define RESOURCE_LABEL_SIZE 16
132 static struct str_ident {
133 char name[RESOURCE_LABEL_SIZE];
134 } str_ident[MAX_RESOURCES];
136 #if defined(CONFIG_PM)
137 static struct gpio_port_s gpio_bank_saved[GPIO_BANK_NUM];
140 inline int check_gpio(unsigned gpio)
142 #if defined(CONFIG_BF54x)
143 if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15
144 || gpio == GPIO_PH14 || gpio == GPIO_PH15
145 || gpio == GPIO_PJ14 || gpio == GPIO_PJ15)
148 if (gpio >= MAX_BLACKFIN_GPIOS)
153 static void gpio_error(unsigned gpio)
155 printk(KERN_ERR "bfin-gpio: GPIO %d wasn't requested!\n", gpio);
158 static void set_label(unsigned short ident, const char *label)
161 strncpy(str_ident[ident].name, label,
162 RESOURCE_LABEL_SIZE);
163 str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0;
167 static char *get_label(unsigned short ident)
169 return (*str_ident[ident].name ? str_ident[ident].name : "UNKNOWN");
172 static int cmp_label(unsigned short ident, const char *label)
176 printk(KERN_ERR "Please provide none-null label\n");
180 return strcmp(str_ident[ident].name, label);
185 static void port_setup(unsigned gpio, unsigned short usage)
187 if (check_gpio(gpio))
190 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
191 if (usage == GPIO_USAGE)
192 *port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
194 *port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
196 #elif defined(CONFIG_BF54x)
197 if (usage == GPIO_USAGE)
198 gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
200 gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio);
208 unsigned short offset;
210 {.res = P_PPI0_D13, .offset = 11},
211 {.res = P_PPI0_D14, .offset = 11},
212 {.res = P_PPI0_D15, .offset = 11},
213 {.res = P_SPORT1_TFS, .offset = 11},
214 {.res = P_SPORT1_TSCLK, .offset = 11},
215 {.res = P_SPORT1_DTPRI, .offset = 11},
216 {.res = P_PPI0_D10, .offset = 10},
217 {.res = P_PPI0_D11, .offset = 10},
218 {.res = P_PPI0_D12, .offset = 10},
219 {.res = P_SPORT1_RSCLK, .offset = 10},
220 {.res = P_SPORT1_RFS, .offset = 10},
221 {.res = P_SPORT1_DRPRI, .offset = 10},
222 {.res = P_PPI0_D8, .offset = 9},
223 {.res = P_PPI0_D9, .offset = 9},
224 {.res = P_SPORT1_DRSEC, .offset = 9},
225 {.res = P_SPORT1_DTSEC, .offset = 9},
226 {.res = P_TMR2, .offset = 8},
227 {.res = P_PPI0_FS3, .offset = 8},
228 {.res = P_TMR3, .offset = 7},
229 {.res = P_SPI0_SSEL4, .offset = 7},
230 {.res = P_TMR4, .offset = 6},
231 {.res = P_SPI0_SSEL5, .offset = 6},
232 {.res = P_TMR5, .offset = 5},
233 {.res = P_SPI0_SSEL6, .offset = 5},
234 {.res = P_UART1_RX, .offset = 4},
235 {.res = P_UART1_TX, .offset = 4},
236 {.res = P_TMR6, .offset = 4},
237 {.res = P_TMR7, .offset = 4},
238 {.res = P_UART0_RX, .offset = 3},
239 {.res = P_UART0_TX, .offset = 3},
240 {.res = P_DMAR0, .offset = 3},
241 {.res = P_DMAR1, .offset = 3},
242 {.res = P_SPORT0_DTSEC, .offset = 1},
243 {.res = P_SPORT0_DRSEC, .offset = 1},
244 {.res = P_CAN0_RX, .offset = 1},
245 {.res = P_CAN0_TX, .offset = 1},
246 {.res = P_SPI0_SSEL7, .offset = 1},
247 {.res = P_SPORT0_TFS, .offset = 0},
248 {.res = P_SPORT0_DTPRI, .offset = 0},
249 {.res = P_SPI0_SSEL2, .offset = 0},
250 {.res = P_SPI0_SSEL3, .offset = 0},
253 static void portmux_setup(unsigned short per)
255 u16 y, offset, muxreg;
256 u16 function = P_FUNCT2MUX(per);
258 for (y = 0; y < ARRAY_SIZE(port_mux_lut); y++) {
259 if (port_mux_lut[y].res == per) {
261 /* SET PORTMUX REG */
263 offset = port_mux_lut[y].offset;
264 muxreg = bfin_read_PORT_MUX();
267 muxreg &= ~(1 << offset);
271 muxreg |= (function << offset);
272 bfin_write_PORT_MUX(muxreg);
276 #elif defined(CONFIG_BF54x)
277 inline void portmux_setup(unsigned short per)
280 u16 ident = P_IDENT(per);
281 u16 function = P_FUNCT2MUX(per);
283 pmux = gpio_array[gpio_bank(ident)]->port_mux;
285 pmux &= ~(0x3 << (2 * gpio_sub_n(ident)));
286 pmux |= (function & 0x3) << (2 * gpio_sub_n(ident));
288 gpio_array[gpio_bank(ident)]->port_mux = pmux;
291 inline u16 get_portmux(unsigned short per)
294 u16 ident = P_IDENT(per);
296 pmux = gpio_array[gpio_bank(ident)]->port_mux;
298 return (pmux >> (2 * gpio_sub_n(ident)) & 0x3);
300 #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
301 inline void portmux_setup(unsigned short per)
303 u16 pmux, ident = P_IDENT(per), function = P_FUNCT2MUX(per);
304 u8 offset = pmux_offset[gpio_bank(ident)][gpio_sub_n(ident)];
306 pmux = *port_mux[gpio_bank(ident)];
307 pmux &= ~(3 << offset);
308 pmux |= (function & 3) << offset;
309 *port_mux[gpio_bank(ident)] = pmux;
313 # define portmux_setup(...) do { } while (0)
317 /***********************************************************
319 * FUNCTIONS: Blackfin General Purpose Ports Access Functions
322 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
325 * DESCRIPTION: These functions abstract direct register access
326 * to Blackfin processor General Purpose
329 * CAUTION: These functions do not belong to the GPIO Driver API
330 *************************************************************
331 * MODIFICATION HISTORY :
332 **************************************************************/
334 /* Set a specific bit */
336 #define SET_GPIO(name) \
337 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
339 unsigned long flags; \
340 local_irq_save_hw(flags); \
342 gpio_array[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
344 gpio_array[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
345 AWA_DUMMY_READ(name); \
346 local_irq_restore_hw(flags); \
348 EXPORT_SYMBOL(set_gpio_ ## name);
350 SET_GPIO(dir) /* set_gpio_dir() */
351 SET_GPIO(inen) /* set_gpio_inen() */
352 SET_GPIO(polar) /* set_gpio_polar() */
353 SET_GPIO(edge) /* set_gpio_edge() */
354 SET_GPIO(both) /* set_gpio_both() */
357 #define SET_GPIO_SC(name) \
358 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
360 unsigned long flags; \
361 if (ANOMALY_05000311 || ANOMALY_05000323) \
362 local_irq_save_hw(flags); \
364 gpio_array[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
366 gpio_array[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
367 if (ANOMALY_05000311 || ANOMALY_05000323) { \
368 AWA_DUMMY_READ(name); \
369 local_irq_restore_hw(flags); \
372 EXPORT_SYMBOL(set_gpio_ ## name);
378 void set_gpio_toggle(unsigned gpio)
381 if (ANOMALY_05000311 || ANOMALY_05000323)
382 local_irq_save_hw(flags);
383 gpio_array[gpio_bank(gpio)]->toggle = gpio_bit(gpio);
384 if (ANOMALY_05000311 || ANOMALY_05000323) {
385 AWA_DUMMY_READ(toggle);
386 local_irq_restore_hw(flags);
389 EXPORT_SYMBOL(set_gpio_toggle);
392 /*Set current PORT date (16-bit word)*/
394 #define SET_GPIO_P(name) \
395 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
397 unsigned long flags; \
398 if (ANOMALY_05000311 || ANOMALY_05000323) \
399 local_irq_save_hw(flags); \
400 gpio_array[gpio_bank(gpio)]->name = arg; \
401 if (ANOMALY_05000311 || ANOMALY_05000323) { \
402 AWA_DUMMY_READ(name); \
403 local_irq_restore_hw(flags); \
406 EXPORT_SYMBOL(set_gpiop_ ## name);
417 /* Get a specific bit */
418 #define GET_GPIO(name) \
419 unsigned short get_gpio_ ## name(unsigned gpio) \
421 unsigned long flags; \
422 unsigned short ret; \
423 if (ANOMALY_05000311 || ANOMALY_05000323) \
424 local_irq_save_hw(flags); \
425 ret = 0x01 & (gpio_array[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
426 if (ANOMALY_05000311 || ANOMALY_05000323) { \
427 AWA_DUMMY_READ(name); \
428 local_irq_restore_hw(flags); \
432 EXPORT_SYMBOL(get_gpio_ ## name);
443 /*Get current PORT date (16-bit word)*/
445 #define GET_GPIO_P(name) \
446 unsigned short get_gpiop_ ## name(unsigned gpio) \
448 unsigned long flags; \
449 unsigned short ret; \
450 if (ANOMALY_05000311 || ANOMALY_05000323) \
451 local_irq_save_hw(flags); \
452 ret = (gpio_array[gpio_bank(gpio)]->name); \
453 if (ANOMALY_05000311 || ANOMALY_05000323) { \
454 AWA_DUMMY_READ(name); \
455 local_irq_restore_hw(flags); \
459 EXPORT_SYMBOL(get_gpiop_ ## name);
473 static unsigned short wakeup_map[GPIO_BANK_NUM];
474 static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
476 static const unsigned int sic_iwr_irqs[] = {
477 #if defined(BF533_FAMILY)
479 #elif defined(BF537_FAMILY)
480 IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX
481 #elif defined(BF538_FAMILY)
483 #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
484 IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB
485 #elif defined(BF561_FAMILY)
486 IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB
488 # error no SIC_IWR defined
492 /***********************************************************
494 * FUNCTIONS: Blackfin PM Setup API
497 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
505 * DESCRIPTION: Blackfin PM Driver API
508 *************************************************************
509 * MODIFICATION HISTORY :
510 **************************************************************/
511 int gpio_pm_wakeup_request(unsigned gpio, unsigned char type)
515 if ((check_gpio(gpio) < 0) || !type)
518 local_irq_save_hw(flags);
519 wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
520 wakeup_flags_map[gpio] = type;
521 local_irq_restore_hw(flags);
525 EXPORT_SYMBOL(gpio_pm_wakeup_request);
527 void gpio_pm_wakeup_free(unsigned gpio)
531 if (check_gpio(gpio) < 0)
534 local_irq_save_hw(flags);
536 wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
538 local_irq_restore_hw(flags);
540 EXPORT_SYMBOL(gpio_pm_wakeup_free);
542 static int bfin_gpio_wakeup_type(unsigned gpio, unsigned char type)
544 port_setup(gpio, GPIO_USAGE);
545 set_gpio_dir(gpio, 0);
546 set_gpio_inen(gpio, 1);
548 if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
549 set_gpio_edge(gpio, 1);
551 set_gpio_edge(gpio, 0);
553 if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
554 set_gpio_both(gpio, 1);
556 set_gpio_both(gpio, 0);
558 if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
559 set_gpio_polar(gpio, 1);
561 set_gpio_polar(gpio, 0);
568 u32 bfin_pm_standby_setup(void)
570 u16 bank, mask, i, gpio;
572 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
573 mask = wakeup_map[gpio_bank(i)];
576 gpio_bank_saved[bank].maskb = gpio_array[bank]->maskb;
577 gpio_array[bank]->maskb = 0;
580 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
581 gpio_bank_saved[bank].fer = *port_fer[bank];
583 gpio_bank_saved[bank].inen = gpio_array[bank]->inen;
584 gpio_bank_saved[bank].polar = gpio_array[bank]->polar;
585 gpio_bank_saved[bank].dir = gpio_array[bank]->dir;
586 gpio_bank_saved[bank].edge = gpio_array[bank]->edge;
587 gpio_bank_saved[bank].both = gpio_array[bank]->both;
588 gpio_bank_saved[bank].reserved =
589 reserved_gpio_map[bank];
594 if ((mask & 1) && (wakeup_flags_map[gpio] !=
596 reserved_gpio_map[gpio_bank(gpio)] |=
598 bfin_gpio_wakeup_type(gpio,
599 wakeup_flags_map[gpio]);
600 set_gpio_data(gpio, 0); /*Clear*/
606 bfin_internal_set_wake(sic_iwr_irqs[bank], 1);
607 gpio_array[bank]->maskb_set = wakeup_map[gpio_bank(i)];
611 AWA_DUMMY_READ(maskb_set);
616 void bfin_pm_standby_restore(void)
620 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
621 mask = wakeup_map[gpio_bank(i)];
625 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
626 *port_fer[bank] = gpio_bank_saved[bank].fer;
628 gpio_array[bank]->inen = gpio_bank_saved[bank].inen;
629 gpio_array[bank]->dir = gpio_bank_saved[bank].dir;
630 gpio_array[bank]->polar = gpio_bank_saved[bank].polar;
631 gpio_array[bank]->edge = gpio_bank_saved[bank].edge;
632 gpio_array[bank]->both = gpio_bank_saved[bank].both;
634 reserved_gpio_map[bank] =
635 gpio_bank_saved[bank].reserved;
636 bfin_internal_set_wake(sic_iwr_irqs[bank], 0);
639 gpio_array[bank]->maskb = gpio_bank_saved[bank].maskb;
641 AWA_DUMMY_READ(maskb);
644 void bfin_gpio_pm_hibernate_suspend(void)
648 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
651 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
652 gpio_bank_saved[bank].fer = *port_fer[bank];
653 #if defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
654 gpio_bank_saved[bank].mux = *port_mux[bank];
657 gpio_bank_saved[bank].mux = bfin_read_PORT_MUX();
660 gpio_bank_saved[bank].data = gpio_array[bank]->data;
661 gpio_bank_saved[bank].inen = gpio_array[bank]->inen;
662 gpio_bank_saved[bank].polar = gpio_array[bank]->polar;
663 gpio_bank_saved[bank].dir = gpio_array[bank]->dir;
664 gpio_bank_saved[bank].edge = gpio_array[bank]->edge;
665 gpio_bank_saved[bank].both = gpio_array[bank]->both;
666 gpio_bank_saved[bank].maska = gpio_array[bank]->maska;
669 AWA_DUMMY_READ(maska);
672 void bfin_gpio_pm_hibernate_restore(void)
676 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
679 #if defined(CONFIG_BF52x) || defined(BF537_FAMILY) || defined(CONFIG_BF51x)
680 #if defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
681 *port_mux[bank] = gpio_bank_saved[bank].mux;
684 bfin_write_PORT_MUX(gpio_bank_saved[bank].mux);
686 *port_fer[bank] = gpio_bank_saved[bank].fer;
688 gpio_array[bank]->inen = gpio_bank_saved[bank].inen;
689 gpio_array[bank]->dir = gpio_bank_saved[bank].dir;
690 gpio_array[bank]->polar = gpio_bank_saved[bank].polar;
691 gpio_array[bank]->edge = gpio_bank_saved[bank].edge;
692 gpio_array[bank]->both = gpio_bank_saved[bank].both;
694 gpio_array[bank]->data_set = gpio_bank_saved[bank].data
695 | gpio_bank_saved[bank].dir;
697 gpio_array[bank]->maska = gpio_bank_saved[bank].maska;
699 AWA_DUMMY_READ(maska);
704 #else /* CONFIG_BF54x */
707 u32 bfin_pm_standby_setup(void)
712 void bfin_pm_standby_restore(void)
717 void bfin_gpio_pm_hibernate_suspend(void)
721 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
724 gpio_bank_saved[bank].fer = gpio_array[bank]->port_fer;
725 gpio_bank_saved[bank].mux = gpio_array[bank]->port_mux;
726 gpio_bank_saved[bank].data = gpio_array[bank]->data;
727 gpio_bank_saved[bank].data = gpio_array[bank]->data;
728 gpio_bank_saved[bank].inen = gpio_array[bank]->inen;
729 gpio_bank_saved[bank].dir = gpio_array[bank]->dir_set;
733 void bfin_gpio_pm_hibernate_restore(void)
737 for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
740 gpio_array[bank]->port_mux = gpio_bank_saved[bank].mux;
741 gpio_array[bank]->port_fer = gpio_bank_saved[bank].fer;
742 gpio_array[bank]->inen = gpio_bank_saved[bank].inen;
743 gpio_array[bank]->dir_set = gpio_bank_saved[bank].dir;
744 gpio_array[bank]->data_set = gpio_bank_saved[bank].data
745 | gpio_bank_saved[bank].dir;
750 unsigned short get_gpio_dir(unsigned gpio)
752 return (0x01 & (gpio_array[gpio_bank(gpio)]->dir_clear >> gpio_sub_n(gpio)));
754 EXPORT_SYMBOL(get_gpio_dir);
756 #endif /* CONFIG_BF54x */
758 /***********************************************************
760 * FUNCTIONS: Blackfin Peripheral Resource Allocation
764 * per Peripheral Identifier
767 * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
770 *************************************************************
771 * MODIFICATION HISTORY :
772 **************************************************************/
774 int peripheral_request(unsigned short per, const char *label)
777 unsigned short ident = P_IDENT(per);
780 * Don't cares are pins with only one dedicated function
783 if (per & P_DONTCARE)
786 if (!(per & P_DEFINED))
789 local_irq_save_hw(flags);
791 /* If a pin can be muxed as either GPIO or peripheral, make
792 * sure it is not already a GPIO pin when we request it.
794 if (unlikely(!check_gpio(ident) &&
795 reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
796 if (system_state == SYSTEM_BOOTING)
799 "%s: Peripheral %d is already reserved as GPIO by %s !\n",
800 __func__, ident, get_label(ident));
801 local_irq_restore_hw(flags);
805 if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
808 * Pin functions like AMC address strobes my
809 * be requested and used by several drivers
813 if (!((per & P_MAYSHARE) && get_portmux(per) == P_FUNCT2MUX(per))) {
815 if (!(per & P_MAYSHARE)) {
818 * Allow that the identical pin function can
819 * be requested from the same driver twice
822 if (cmp_label(ident, label) == 0)
825 if (system_state == SYSTEM_BOOTING)
828 "%s: Peripheral %d function %d is already reserved by %s !\n",
829 __func__, ident, P_FUNCT2MUX(per), get_label(ident));
830 local_irq_restore_hw(flags);
836 reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
839 port_setup(ident, PERIPHERAL_USAGE);
841 local_irq_restore_hw(flags);
842 set_label(ident, label);
846 EXPORT_SYMBOL(peripheral_request);
848 int peripheral_request_list(const unsigned short per[], const char *label)
853 for (cnt = 0; per[cnt] != 0; cnt++) {
855 ret = peripheral_request(per[cnt], label);
858 for ( ; cnt > 0; cnt--)
859 peripheral_free(per[cnt - 1]);
867 EXPORT_SYMBOL(peripheral_request_list);
869 void peripheral_free(unsigned short per)
872 unsigned short ident = P_IDENT(per);
874 if (per & P_DONTCARE)
877 if (!(per & P_DEFINED))
880 local_irq_save_hw(flags);
882 if (unlikely(!(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident)))) {
883 local_irq_restore_hw(flags);
887 if (!(per & P_MAYSHARE))
888 port_setup(ident, GPIO_USAGE);
890 reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);
892 set_label(ident, "free");
894 local_irq_restore_hw(flags);
896 EXPORT_SYMBOL(peripheral_free);
898 void peripheral_free_list(const unsigned short per[])
901 for (cnt = 0; per[cnt] != 0; cnt++)
902 peripheral_free(per[cnt]);
904 EXPORT_SYMBOL(peripheral_free_list);
906 /***********************************************************
908 * FUNCTIONS: Blackfin GPIO Driver
911 * gpio PIO Number between 0 and MAX_BLACKFIN_GPIOS
914 * DESCRIPTION: Blackfin GPIO Driver API
917 *************************************************************
918 * MODIFICATION HISTORY :
919 **************************************************************/
921 int bfin_gpio_request(unsigned gpio, const char *label)
925 if (check_gpio(gpio) < 0)
928 local_irq_save_hw(flags);
931 * Allow that the identical GPIO can
932 * be requested from the same driver twice
933 * Do nothing and return -
936 if (cmp_label(gpio, label) == 0) {
937 local_irq_restore_hw(flags);
941 if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
942 if (system_state == SYSTEM_BOOTING)
944 printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
945 gpio, get_label(gpio));
946 local_irq_restore_hw(flags);
949 if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
950 if (system_state == SYSTEM_BOOTING)
953 "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
954 gpio, get_label(gpio));
955 local_irq_restore_hw(flags);
958 if (unlikely(reserved_gpio_irq_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
959 printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved as gpio-irq!"
960 " (Documentation/blackfin/bfin-gpio-notes.txt)\n", gpio);
963 else { /* Reset POLAR setting when acquiring a gpio for the first time */
964 set_gpio_polar(gpio, 0);
968 reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio);
969 set_label(gpio, label);
971 local_irq_restore_hw(flags);
973 port_setup(gpio, GPIO_USAGE);
977 EXPORT_SYMBOL(bfin_gpio_request);
979 void bfin_gpio_free(unsigned gpio)
983 if (check_gpio(gpio) < 0)
988 local_irq_save_hw(flags);
990 if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
991 if (system_state == SYSTEM_BOOTING)
994 local_irq_restore_hw(flags);
998 reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
1000 set_label(gpio, "free");
1002 local_irq_restore_hw(flags);
1004 EXPORT_SYMBOL(bfin_gpio_free);
1006 int bfin_gpio_irq_request(unsigned gpio, const char *label)
1008 unsigned long flags;
1010 if (check_gpio(gpio) < 0)
1013 local_irq_save_hw(flags);
1015 if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1016 if (system_state == SYSTEM_BOOTING)
1019 "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
1020 gpio, get_label(gpio));
1021 local_irq_restore_hw(flags);
1024 if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))
1025 printk(KERN_NOTICE "bfin-gpio: GPIO %d is already reserved by %s! "
1026 "(Documentation/blackfin/bfin-gpio-notes.txt)\n",
1027 gpio, get_label(gpio));
1029 reserved_gpio_irq_map[gpio_bank(gpio)] |= gpio_bit(gpio);
1030 set_label(gpio, label);
1032 local_irq_restore_hw(flags);
1034 port_setup(gpio, GPIO_USAGE);
1039 void bfin_gpio_irq_free(unsigned gpio)
1041 unsigned long flags;
1043 if (check_gpio(gpio) < 0)
1046 local_irq_save_hw(flags);
1048 if (unlikely(!(reserved_gpio_irq_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
1049 if (system_state == SYSTEM_BOOTING)
1052 local_irq_restore_hw(flags);
1056 reserved_gpio_irq_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);
1058 set_label(gpio, "free");
1060 local_irq_restore_hw(flags);
1063 static inline void __bfin_gpio_direction_input(unsigned gpio)
1066 gpio_array[gpio_bank(gpio)]->dir_clear = gpio_bit(gpio);
1068 gpio_array[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
1070 gpio_array[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
1073 int bfin_gpio_direction_input(unsigned gpio)
1075 unsigned long flags;
1077 if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1082 local_irq_save_hw(flags);
1083 __bfin_gpio_direction_input(gpio);
1084 AWA_DUMMY_READ(inen);
1085 local_irq_restore_hw(flags);
1089 EXPORT_SYMBOL(bfin_gpio_direction_input);
1091 void bfin_gpio_irq_prepare(unsigned gpio)
1094 unsigned long flags;
1097 port_setup(gpio, GPIO_USAGE);
1100 local_irq_save_hw(flags);
1101 __bfin_gpio_direction_input(gpio);
1102 local_irq_restore_hw(flags);
1106 void bfin_gpio_set_value(unsigned gpio, int arg)
1109 gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1111 gpio_array[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
1113 EXPORT_SYMBOL(bfin_gpio_set_value);
1115 int bfin_gpio_direction_output(unsigned gpio, int value)
1117 unsigned long flags;
1119 if (!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
1124 local_irq_save_hw(flags);
1126 gpio_array[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
1127 gpio_set_value(gpio, value);
1129 gpio_array[gpio_bank(gpio)]->dir_set = gpio_bit(gpio);
1131 gpio_array[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
1134 AWA_DUMMY_READ(dir);
1135 local_irq_restore_hw(flags);
1139 EXPORT_SYMBOL(bfin_gpio_direction_output);
1141 int bfin_gpio_get_value(unsigned gpio)
1144 return (1 & (gpio_array[gpio_bank(gpio)]->data >> gpio_sub_n(gpio)));
1146 unsigned long flags;
1148 if (unlikely(get_gpio_edge(gpio))) {
1150 local_irq_save_hw(flags);
1151 set_gpio_edge(gpio, 0);
1152 ret = get_gpio_data(gpio);
1153 set_gpio_edge(gpio, 1);
1154 local_irq_restore_hw(flags);
1157 return get_gpio_data(gpio);
1160 EXPORT_SYMBOL(bfin_gpio_get_value);
1162 /* If we are booting from SPI and our board lacks a strong enough pull up,
1163 * the core can reset and execute the bootrom faster than the resistor can
1164 * pull the signal logically high. To work around this (common) error in
1165 * board design, we explicitly set the pin back to GPIO mode, force /CS
1166 * high, and wait for the electrons to do their thing.
1168 * This function only makes sense to be called from reset code, but it
1169 * lives here as we need to force all the GPIO states w/out going through
1170 * BUG() checks and such.
1172 void bfin_reset_boot_spi_cs(unsigned short pin)
1174 unsigned short gpio = P_IDENT(pin);
1175 port_setup(gpio, GPIO_USAGE);
1176 gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
1177 AWA_DUMMY_READ(data_set);
1181 #if defined(CONFIG_PROC_FS)
1182 static int gpio_proc_read(char *buf, char **start, off_t offset,
1183 int len, int *unused_i, void *unused_v)
1185 int c, irq, gpio, outlen = 0;
1187 for (c = 0; c < MAX_RESOURCES; c++) {
1188 irq = reserved_gpio_irq_map[gpio_bank(c)] & gpio_bit(c);
1189 gpio = reserved_gpio_map[gpio_bank(c)] & gpio_bit(c);
1190 if (!check_gpio(c) && (gpio || irq))
1191 len = sprintf(buf, "GPIO_%d: \t%s%s \t\tGPIO %s\n", c,
1192 get_label(c), (gpio && irq) ? " *" : "",
1193 get_gpio_dir(c) ? "OUTPUT" : "INPUT");
1194 else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c))
1195 len = sprintf(buf, "GPIO_%d: \t%s \t\tPeripheral\n", c, get_label(c));
1204 static __init int gpio_register_proc(void)
1206 struct proc_dir_entry *proc_gpio;
1208 proc_gpio = create_proc_entry("gpio", S_IRUGO, NULL);
1210 proc_gpio->read_proc = gpio_proc_read;
1211 return proc_gpio != NULL;
1213 __initcall(gpio_register_proc);
1216 #ifdef CONFIG_GPIOLIB
1217 int bfin_gpiolib_direction_input(struct gpio_chip *chip, unsigned gpio)
1219 return bfin_gpio_direction_input(gpio);
1222 int bfin_gpiolib_direction_output(struct gpio_chip *chip, unsigned gpio, int level)
1224 return bfin_gpio_direction_output(gpio, level);
1227 int bfin_gpiolib_get_value(struct gpio_chip *chip, unsigned gpio)
1229 return bfin_gpio_get_value(gpio);
1232 void bfin_gpiolib_set_value(struct gpio_chip *chip, unsigned gpio, int value)
1234 return bfin_gpio_set_value(gpio, value);
1237 int bfin_gpiolib_gpio_request(struct gpio_chip *chip, unsigned gpio)
1239 return bfin_gpio_request(gpio, chip->label);
1242 void bfin_gpiolib_gpio_free(struct gpio_chip *chip, unsigned gpio)
1244 return bfin_gpio_free(gpio);
1247 static struct gpio_chip bfin_chip = {
1248 .label = "Blackfin-GPIOlib",
1249 .direction_input = bfin_gpiolib_direction_input,
1250 .get = bfin_gpiolib_get_value,
1251 .direction_output = bfin_gpiolib_direction_output,
1252 .set = bfin_gpiolib_set_value,
1253 .request = bfin_gpiolib_gpio_request,
1254 .free = bfin_gpiolib_gpio_free,
1256 .ngpio = MAX_BLACKFIN_GPIOS,
1259 static int __init bfin_gpiolib_setup(void)
1261 return gpiochip_add(&bfin_chip);
1263 arch_initcall(bfin_gpiolib_setup);