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
31 * Number BF537/6/4 BF561 BF533/2/1 BF549/8/4/2
33 * GPIO_0 PF0 PF0 PF0 PA0...PJ13
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
83 #include <linux/delay.h>
84 #include <linux/module.h>
85 #include <linux/err.h>
86 #include <linux/proc_fs.h>
87 #include <asm/blackfin.h>
89 #include <asm/portmux.h>
90 #include <linux/irq.h>
92 #if ANOMALY_05000311 || ANOMALY_05000323
95 AWA_data_clear
= SYSCR
,
98 AWA_maska
= BFIN_UART_SCR
,
99 AWA_maska_clear
= BFIN_UART_SCR
,
100 AWA_maska_set
= BFIN_UART_SCR
,
101 AWA_maska_toggle
= BFIN_UART_SCR
,
102 AWA_maskb
= BFIN_UART_GCTL
,
103 AWA_maskb_clear
= BFIN_UART_GCTL
,
104 AWA_maskb_set
= BFIN_UART_GCTL
,
105 AWA_maskb_toggle
= BFIN_UART_GCTL
,
106 AWA_dir
= SPORT1_STAT
,
107 AWA_polar
= SPORT1_STAT
,
108 AWA_edge
= SPORT1_STAT
,
109 AWA_both
= SPORT1_STAT
,
111 AWA_inen
= TIMER_ENABLE
,
112 #elif ANOMALY_05000323
113 AWA_inen
= DMA1_1_CONFIG
,
116 /* Anomaly Workaround */
117 #define AWA_DUMMY_READ(name) bfin_read16(AWA_ ## name)
119 #define AWA_DUMMY_READ(...) do { } while (0)
123 static struct gpio_port_t
*gpio_bankb
[gpio_bank(MAX_BLACKFIN_GPIOS
)] = {
124 (struct gpio_port_t
*) FIO_FLAG_D
,
128 #if defined(BF527_FAMILY) || defined(BF537_FAMILY)
129 static struct gpio_port_t
*gpio_bankb
[gpio_bank(MAX_BLACKFIN_GPIOS
)] = {
130 (struct gpio_port_t
*) PORTFIO
,
131 (struct gpio_port_t
*) PORTGIO
,
132 (struct gpio_port_t
*) PORTHIO
,
135 static unsigned short *port_fer
[gpio_bank(MAX_BLACKFIN_GPIOS
)] = {
136 (unsigned short *) PORTF_FER
,
137 (unsigned short *) PORTG_FER
,
138 (unsigned short *) PORTH_FER
,
143 static unsigned short *port_mux
[gpio_bank(MAX_BLACKFIN_GPIOS
)] = {
144 (unsigned short *) PORTF_MUX
,
145 (unsigned short *) PORTG_MUX
,
146 (unsigned short *) PORTH_MUX
,
150 u8 pmux_offset
[][16] =
151 {{ 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 4, 6, 8, 8, 10, 10 }, /* PORTF */
152 { 0, 0, 0, 0, 0, 2, 2, 4, 4, 6, 8, 10, 10, 10, 12, 12 }, /* PORTG */
153 { 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 4, 4, 4, 4, 4 }, /* PORTH */
158 static struct gpio_port_t
*gpio_bankb
[gpio_bank(MAX_BLACKFIN_GPIOS
)] = {
159 (struct gpio_port_t
*) FIO0_FLAG_D
,
160 (struct gpio_port_t
*) FIO1_FLAG_D
,
161 (struct gpio_port_t
*) FIO2_FLAG_D
,
166 static struct gpio_port_t
*gpio_array
[gpio_bank(MAX_BLACKFIN_GPIOS
)] = {
167 (struct gpio_port_t
*)PORTA_FER
,
168 (struct gpio_port_t
*)PORTB_FER
,
169 (struct gpio_port_t
*)PORTC_FER
,
170 (struct gpio_port_t
*)PORTD_FER
,
171 (struct gpio_port_t
*)PORTE_FER
,
172 (struct gpio_port_t
*)PORTF_FER
,
173 (struct gpio_port_t
*)PORTG_FER
,
174 (struct gpio_port_t
*)PORTH_FER
,
175 (struct gpio_port_t
*)PORTI_FER
,
176 (struct gpio_port_t
*)PORTJ_FER
,
180 static unsigned short reserved_gpio_map
[gpio_bank(MAX_BLACKFIN_GPIOS
)];
181 static unsigned short reserved_peri_map
[gpio_bank(MAX_RESOURCES
)];
183 #define RESOURCE_LABEL_SIZE 16
185 static struct str_ident
{
186 char name
[RESOURCE_LABEL_SIZE
];
187 } str_ident
[MAX_RESOURCES
];
189 #if defined(CONFIG_PM)
190 #if defined(CONFIG_BF54x)
191 static struct gpio_port_s gpio_bank_saved
[gpio_bank(MAX_BLACKFIN_GPIOS
)];
193 static unsigned short wakeup_map
[gpio_bank(MAX_BLACKFIN_GPIOS
)];
194 static unsigned char wakeup_flags_map
[MAX_BLACKFIN_GPIOS
];
195 static struct gpio_port_s gpio_bank_saved
[gpio_bank(MAX_BLACKFIN_GPIOS
)];
198 static unsigned int sic_iwr_irqs
[gpio_bank(MAX_BLACKFIN_GPIOS
)] = {IRQ_PROG_INTB
};
202 static unsigned int sic_iwr_irqs
[gpio_bank(MAX_BLACKFIN_GPIOS
)] = {IRQ_PROG_INTB
, IRQ_PORTG_INTB
, IRQ_MAC_TX
};
206 static unsigned int sic_iwr_irqs
[gpio_bank(MAX_BLACKFIN_GPIOS
)] = {IRQ_PORTF_INTB
, IRQ_PORTG_INTB
, IRQ_PORTH_INTB
};
210 static unsigned int sic_iwr_irqs
[gpio_bank(MAX_BLACKFIN_GPIOS
)] = {IRQ_PROG0_INTB
, IRQ_PROG1_INTB
, IRQ_PROG2_INTB
};
213 #endif /* CONFIG_PM */
215 #if defined(BF548_FAMILY)
216 inline int check_gpio(unsigned gpio
)
218 if (gpio
== GPIO_PB15
|| gpio
== GPIO_PC14
|| gpio
== GPIO_PC15
219 || gpio
== GPIO_PH14
|| gpio
== GPIO_PH15
220 || gpio
== GPIO_PJ14
|| gpio
== GPIO_PJ15
221 || gpio
> MAX_BLACKFIN_GPIOS
)
226 inline int check_gpio(unsigned gpio
)
228 if (gpio
>= MAX_BLACKFIN_GPIOS
)
234 void gpio_error(unsigned gpio
)
236 printk(KERN_ERR
"bfin-gpio: GPIO %d wasn't requested!\n", gpio
);
239 static void set_label(unsigned short ident
, const char *label
)
241 if (label
&& str_ident
) {
242 strncpy(str_ident
[ident
].name
, label
,
243 RESOURCE_LABEL_SIZE
);
244 str_ident
[ident
].name
[RESOURCE_LABEL_SIZE
- 1] = 0;
248 static char *get_label(unsigned short ident
)
253 return (*str_ident
[ident
].name
? str_ident
[ident
].name
: "UNKNOWN");
256 static int cmp_label(unsigned short ident
, const char *label
)
260 printk(KERN_ERR
"Please provide none-null label\n");
263 if (label
&& str_ident
)
264 return strncmp(str_ident
[ident
].name
,
265 label
, strlen(label
));
270 #if defined(BF527_FAMILY) || defined(BF537_FAMILY)
271 static void port_setup(unsigned gpio
, unsigned short usage
)
273 if (!check_gpio(gpio
)) {
274 if (usage
== GPIO_USAGE
)
275 *port_fer
[gpio_bank(gpio
)] &= ~gpio_bit(gpio
);
277 *port_fer
[gpio_bank(gpio
)] |= gpio_bit(gpio
);
281 #elif defined(BF548_FAMILY)
282 static void port_setup(unsigned gpio
, unsigned short usage
)
284 if (usage
== GPIO_USAGE
)
285 gpio_array
[gpio_bank(gpio
)]->port_fer
&= ~gpio_bit(gpio
);
287 gpio_array
[gpio_bank(gpio
)]->port_fer
|= gpio_bit(gpio
);
291 # define port_setup(...) do { } while (0)
297 unsigned short offset
;
299 {.res
= P_PPI0_D13
, .offset
= 11},
300 {.res
= P_PPI0_D14
, .offset
= 11},
301 {.res
= P_PPI0_D15
, .offset
= 11},
302 {.res
= P_SPORT1_TFS
, .offset
= 11},
303 {.res
= P_SPORT1_TSCLK
, .offset
= 11},
304 {.res
= P_SPORT1_DTPRI
, .offset
= 11},
305 {.res
= P_PPI0_D10
, .offset
= 10},
306 {.res
= P_PPI0_D11
, .offset
= 10},
307 {.res
= P_PPI0_D12
, .offset
= 10},
308 {.res
= P_SPORT1_RSCLK
, .offset
= 10},
309 {.res
= P_SPORT1_RFS
, .offset
= 10},
310 {.res
= P_SPORT1_DRPRI
, .offset
= 10},
311 {.res
= P_PPI0_D8
, .offset
= 9},
312 {.res
= P_PPI0_D9
, .offset
= 9},
313 {.res
= P_SPORT1_DRSEC
, .offset
= 9},
314 {.res
= P_SPORT1_DTSEC
, .offset
= 9},
315 {.res
= P_TMR2
, .offset
= 8},
316 {.res
= P_PPI0_FS3
, .offset
= 8},
317 {.res
= P_TMR3
, .offset
= 7},
318 {.res
= P_SPI0_SSEL4
, .offset
= 7},
319 {.res
= P_TMR4
, .offset
= 6},
320 {.res
= P_SPI0_SSEL5
, .offset
= 6},
321 {.res
= P_TMR5
, .offset
= 5},
322 {.res
= P_SPI0_SSEL6
, .offset
= 5},
323 {.res
= P_UART1_RX
, .offset
= 4},
324 {.res
= P_UART1_TX
, .offset
= 4},
325 {.res
= P_TMR6
, .offset
= 4},
326 {.res
= P_TMR7
, .offset
= 4},
327 {.res
= P_UART0_RX
, .offset
= 3},
328 {.res
= P_UART0_TX
, .offset
= 3},
329 {.res
= P_DMAR0
, .offset
= 3},
330 {.res
= P_DMAR1
, .offset
= 3},
331 {.res
= P_SPORT0_DTSEC
, .offset
= 1},
332 {.res
= P_SPORT0_DRSEC
, .offset
= 1},
333 {.res
= P_CAN0_RX
, .offset
= 1},
334 {.res
= P_CAN0_TX
, .offset
= 1},
335 {.res
= P_SPI0_SSEL7
, .offset
= 1},
336 {.res
= P_SPORT0_TFS
, .offset
= 0},
337 {.res
= P_SPORT0_DTPRI
, .offset
= 0},
338 {.res
= P_SPI0_SSEL2
, .offset
= 0},
339 {.res
= P_SPI0_SSEL3
, .offset
= 0},
342 static void portmux_setup(unsigned short per
, unsigned short function
)
344 u16 y
, offset
, muxreg
;
346 for (y
= 0; y
< ARRAY_SIZE(port_mux_lut
); y
++) {
347 if (port_mux_lut
[y
].res
== per
) {
349 /* SET PORTMUX REG */
351 offset
= port_mux_lut
[y
].offset
;
352 muxreg
= bfin_read_PORT_MUX();
355 muxreg
&= ~(1 << offset
);
359 muxreg
|= (function
<< offset
);
360 bfin_write_PORT_MUX(muxreg
);
364 #elif defined(BF548_FAMILY)
365 inline void portmux_setup(unsigned short portno
, unsigned short function
)
369 pmux
= gpio_array
[gpio_bank(portno
)]->port_mux
;
371 pmux
&= ~(0x3 << (2 * gpio_sub_n(portno
)));
372 pmux
|= (function
& 0x3) << (2 * gpio_sub_n(portno
));
374 gpio_array
[gpio_bank(portno
)]->port_mux
= pmux
;
377 inline u16
get_portmux(unsigned short portno
)
381 pmux
= gpio_array
[gpio_bank(portno
)]->port_mux
;
383 return (pmux
>> (2 * gpio_sub_n(portno
)) & 0x3);
385 #elif defined(BF527_FAMILY)
386 inline void portmux_setup(unsigned short portno
, unsigned short function
)
388 u16 pmux
, ident
= P_IDENT(portno
);
389 u8 offset
= pmux_offset
[gpio_bank(ident
)][gpio_sub_n(ident
)];
391 pmux
= *port_mux
[gpio_bank(ident
)];
392 pmux
&= ~(3 << offset
);
393 pmux
|= (function
& 3) << offset
;
394 *port_mux
[gpio_bank(ident
)] = pmux
;
398 # define portmux_setup(...) do { } while (0)
401 static int __init
bfin_gpio_init(void)
403 printk(KERN_INFO
"Blackfin GPIO Controller\n");
407 arch_initcall(bfin_gpio_init
);
411 /***********************************************************
413 * FUNCTIONS: Blackfin General Purpose Ports Access Functions
416 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
419 * DESCRIPTION: These functions abstract direct register access
420 * to Blackfin processor General Purpose
423 * CAUTION: These functions do not belong to the GPIO Driver API
424 *************************************************************
425 * MODIFICATION HISTORY :
426 **************************************************************/
428 /* Set a specific bit */
430 #define SET_GPIO(name) \
431 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
433 unsigned long flags; \
434 local_irq_save(flags); \
436 gpio_bankb[gpio_bank(gpio)]->name |= gpio_bit(gpio); \
438 gpio_bankb[gpio_bank(gpio)]->name &= ~gpio_bit(gpio); \
439 AWA_DUMMY_READ(name); \
440 local_irq_restore(flags); \
442 EXPORT_SYMBOL(set_gpio_ ## name);
451 #if ANOMALY_05000311 || ANOMALY_05000323
452 #define SET_GPIO_SC(name) \
453 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
455 unsigned long flags; \
456 local_irq_save(flags); \
458 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
460 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
461 AWA_DUMMY_READ(name); \
462 local_irq_restore(flags); \
464 EXPORT_SYMBOL(set_gpio_ ## name);
466 #define SET_GPIO_SC(name) \
467 void set_gpio_ ## name(unsigned gpio, unsigned short arg) \
470 gpio_bankb[gpio_bank(gpio)]->name ## _set = gpio_bit(gpio); \
472 gpio_bankb[gpio_bank(gpio)]->name ## _clear = gpio_bit(gpio); \
474 EXPORT_SYMBOL(set_gpio_ ## name);
481 #if ANOMALY_05000311 || ANOMALY_05000323
482 void set_gpio_toggle(unsigned gpio
)
485 local_irq_save(flags
);
486 gpio_bankb
[gpio_bank(gpio
)]->toggle
= gpio_bit(gpio
);
487 AWA_DUMMY_READ(toggle
);
488 local_irq_restore(flags
);
491 void set_gpio_toggle(unsigned gpio
)
493 gpio_bankb
[gpio_bank(gpio
)]->toggle
= gpio_bit(gpio
);
496 EXPORT_SYMBOL(set_gpio_toggle
);
499 /*Set current PORT date (16-bit word)*/
501 #if ANOMALY_05000311 || ANOMALY_05000323
502 #define SET_GPIO_P(name) \
503 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
505 unsigned long flags; \
506 local_irq_save(flags); \
507 gpio_bankb[gpio_bank(gpio)]->name = arg; \
508 AWA_DUMMY_READ(name); \
509 local_irq_restore(flags); \
511 EXPORT_SYMBOL(set_gpiop_ ## name);
513 #define SET_GPIO_P(name) \
514 void set_gpiop_ ## name(unsigned gpio, unsigned short arg) \
516 gpio_bankb[gpio_bank(gpio)]->name = arg; \
518 EXPORT_SYMBOL(set_gpiop_ ## name);
530 /* Get a specific bit */
531 #if ANOMALY_05000311 || ANOMALY_05000323
532 #define GET_GPIO(name) \
533 unsigned short get_gpio_ ## name(unsigned gpio) \
535 unsigned long flags; \
536 unsigned short ret; \
537 local_irq_save(flags); \
538 ret = 0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio)); \
539 AWA_DUMMY_READ(name); \
540 local_irq_restore(flags); \
543 EXPORT_SYMBOL(get_gpio_ ## name);
545 #define GET_GPIO(name) \
546 unsigned short get_gpio_ ## name(unsigned gpio) \
548 return (0x01 & (gpio_bankb[gpio_bank(gpio)]->name >> gpio_sub_n(gpio))); \
550 EXPORT_SYMBOL(get_gpio_ ## name);
562 /*Get current PORT date (16-bit word)*/
564 #if ANOMALY_05000311 || ANOMALY_05000323
565 #define GET_GPIO_P(name) \
566 unsigned short get_gpiop_ ## name(unsigned gpio) \
568 unsigned long flags; \
569 unsigned short ret; \
570 local_irq_save(flags); \
571 ret = (gpio_bankb[gpio_bank(gpio)]->name); \
572 AWA_DUMMY_READ(name); \
573 local_irq_restore(flags); \
576 EXPORT_SYMBOL(get_gpiop_ ## name);
578 #define GET_GPIO_P(name) \
579 unsigned short get_gpiop_ ## name(unsigned gpio) \
581 return (gpio_bankb[gpio_bank(gpio)]->name);\
583 EXPORT_SYMBOL(get_gpiop_ ## name);
597 /***********************************************************
599 * FUNCTIONS: Blackfin PM Setup API
602 * gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
610 * DESCRIPTION: Blackfin PM Driver API
613 *************************************************************
614 * MODIFICATION HISTORY :
615 **************************************************************/
616 int gpio_pm_wakeup_request(unsigned gpio
, unsigned char type
)
620 if ((check_gpio(gpio
) < 0) || !type
)
623 local_irq_save(flags
);
624 wakeup_map
[gpio_bank(gpio
)] |= gpio_bit(gpio
);
625 wakeup_flags_map
[gpio
] = type
;
626 local_irq_restore(flags
);
630 EXPORT_SYMBOL(gpio_pm_wakeup_request
);
632 void gpio_pm_wakeup_free(unsigned gpio
)
636 if (check_gpio(gpio
) < 0)
639 local_irq_save(flags
);
641 wakeup_map
[gpio_bank(gpio
)] &= ~gpio_bit(gpio
);
643 local_irq_restore(flags
);
645 EXPORT_SYMBOL(gpio_pm_wakeup_free
);
647 static int bfin_gpio_wakeup_type(unsigned gpio
, unsigned char type
)
649 port_setup(gpio
, GPIO_USAGE
);
650 set_gpio_dir(gpio
, 0);
651 set_gpio_inen(gpio
, 1);
653 if (type
& (PM_WAKE_RISING
| PM_WAKE_FALLING
))
654 set_gpio_edge(gpio
, 1);
656 set_gpio_edge(gpio
, 0);
658 if ((type
& (PM_WAKE_BOTH_EDGES
)) == (PM_WAKE_BOTH_EDGES
))
659 set_gpio_both(gpio
, 1);
661 set_gpio_both(gpio
, 0);
663 if ((type
& (PM_WAKE_FALLING
| PM_WAKE_LOW
)))
664 set_gpio_polar(gpio
, 1);
666 set_gpio_polar(gpio
, 0);
673 u32
bfin_pm_standby_setup(void)
675 u16 bank
, mask
, i
, gpio
;
677 for (i
= 0; i
< MAX_BLACKFIN_GPIOS
; i
+= GPIO_BANKSIZE
) {
678 mask
= wakeup_map
[gpio_bank(i
)];
681 gpio_bank_saved
[bank
].maskb
= gpio_bankb
[bank
]->maskb
;
682 gpio_bankb
[bank
]->maskb
= 0;
685 #if defined(BF527_FAMILY) || defined(BF537_FAMILY)
686 gpio_bank_saved
[bank
].fer
= *port_fer
[bank
];
688 gpio_bank_saved
[bank
].inen
= gpio_bankb
[bank
]->inen
;
689 gpio_bank_saved
[bank
].polar
= gpio_bankb
[bank
]->polar
;
690 gpio_bank_saved
[bank
].dir
= gpio_bankb
[bank
]->dir
;
691 gpio_bank_saved
[bank
].edge
= gpio_bankb
[bank
]->edge
;
692 gpio_bank_saved
[bank
].both
= gpio_bankb
[bank
]->both
;
693 gpio_bank_saved
[bank
].reserved
=
694 reserved_gpio_map
[bank
];
699 if ((mask
& 1) && (wakeup_flags_map
[gpio
] !=
701 reserved_gpio_map
[gpio_bank(gpio
)] |=
703 bfin_gpio_wakeup_type(gpio
,
704 wakeup_flags_map
[gpio
]);
705 set_gpio_data(gpio
, 0); /*Clear*/
711 bfin_internal_set_wake(sic_iwr_irqs
[bank
], 1);
712 gpio_bankb
[bank
]->maskb_set
= wakeup_map
[gpio_bank(i
)];
716 AWA_DUMMY_READ(maskb_set
);
721 void bfin_pm_standby_restore(void)
725 for (i
= 0; i
< MAX_BLACKFIN_GPIOS
; i
+= GPIO_BANKSIZE
) {
726 mask
= wakeup_map
[gpio_bank(i
)];
730 #if defined(BF527_FAMILY) || defined(BF537_FAMILY)
731 *port_fer
[bank
] = gpio_bank_saved
[bank
].fer
;
733 gpio_bankb
[bank
]->inen
= gpio_bank_saved
[bank
].inen
;
734 gpio_bankb
[bank
]->dir
= gpio_bank_saved
[bank
].dir
;
735 gpio_bankb
[bank
]->polar
= gpio_bank_saved
[bank
].polar
;
736 gpio_bankb
[bank
]->edge
= gpio_bank_saved
[bank
].edge
;
737 gpio_bankb
[bank
]->both
= gpio_bank_saved
[bank
].both
;
739 reserved_gpio_map
[bank
] =
740 gpio_bank_saved
[bank
].reserved
;
741 bfin_internal_set_wake(sic_iwr_irqs
[bank
], 0);
744 gpio_bankb
[bank
]->maskb
= gpio_bank_saved
[bank
].maskb
;
746 AWA_DUMMY_READ(maskb
);
749 void bfin_gpio_pm_hibernate_suspend(void)
753 for (i
= 0; i
< MAX_BLACKFIN_GPIOS
; i
+= GPIO_BANKSIZE
) {
756 #if defined(BF527_FAMILY) || defined(BF537_FAMILY)
757 gpio_bank_saved
[bank
].fer
= *port_fer
[bank
];
759 gpio_bank_saved
[bank
].mux
= *port_mux
[bank
];
762 gpio_bank_saved
[bank
].mux
= bfin_read_PORT_MUX();
765 gpio_bank_saved
[bank
].data
= gpio_bankb
[bank
]->data
;
766 gpio_bank_saved
[bank
].inen
= gpio_bankb
[bank
]->inen
;
767 gpio_bank_saved
[bank
].polar
= gpio_bankb
[bank
]->polar
;
768 gpio_bank_saved
[bank
].dir
= gpio_bankb
[bank
]->dir
;
769 gpio_bank_saved
[bank
].edge
= gpio_bankb
[bank
]->edge
;
770 gpio_bank_saved
[bank
].both
= gpio_bankb
[bank
]->both
;
771 gpio_bank_saved
[bank
].maska
= gpio_bankb
[bank
]->maska
;
774 AWA_DUMMY_READ(maska
);
777 void bfin_gpio_pm_hibernate_restore(void)
781 for (i
= 0; i
< MAX_BLACKFIN_GPIOS
; i
+= GPIO_BANKSIZE
) {
784 #if defined(BF527_FAMILY) || defined(BF537_FAMILY)
786 *port_mux
[bank
] = gpio_bank_saved
[bank
].mux
;
789 bfin_write_PORT_MUX(gpio_bank_saved
[bank
].mux
);
791 *port_fer
[bank
] = gpio_bank_saved
[bank
].fer
;
793 gpio_bankb
[bank
]->inen
= gpio_bank_saved
[bank
].inen
;
794 gpio_bankb
[bank
]->dir
= gpio_bank_saved
[bank
].dir
;
795 gpio_bankb
[bank
]->polar
= gpio_bank_saved
[bank
].polar
;
796 gpio_bankb
[bank
]->edge
= gpio_bank_saved
[bank
].edge
;
797 gpio_bankb
[bank
]->both
= gpio_bank_saved
[bank
].both
;
799 gpio_bankb
[bank
]->data_set
= gpio_bank_saved
[bank
].data
800 | gpio_bank_saved
[bank
].dir
;
802 gpio_bankb
[bank
]->maska
= gpio_bank_saved
[bank
].maska
;
804 AWA_DUMMY_READ(maska
);
809 #else /* BF548_FAMILY */
812 u32
bfin_pm_standby_setup(void)
817 void bfin_pm_standby_restore(void)
822 void bfin_gpio_pm_hibernate_suspend(void)
826 for (i
= 0; i
< MAX_BLACKFIN_GPIOS
; i
+= GPIO_BANKSIZE
) {
829 gpio_bank_saved
[bank
].fer
= gpio_array
[bank
]->port_fer
;
830 gpio_bank_saved
[bank
].mux
= gpio_array
[bank
]->port_mux
;
831 gpio_bank_saved
[bank
].data
= gpio_array
[bank
]->port_data
;
832 gpio_bank_saved
[bank
].data
= gpio_array
[bank
]->port_data
;
833 gpio_bank_saved
[bank
].inen
= gpio_array
[bank
]->port_inen
;
834 gpio_bank_saved
[bank
].dir
= gpio_array
[bank
]->port_dir_set
;
838 void bfin_gpio_pm_hibernate_restore(void)
842 for (i
= 0; i
< MAX_BLACKFIN_GPIOS
; i
+= GPIO_BANKSIZE
) {
845 gpio_array
[bank
]->port_mux
= gpio_bank_saved
[bank
].mux
;
846 gpio_array
[bank
]->port_fer
= gpio_bank_saved
[bank
].fer
;
847 gpio_array
[bank
]->port_inen
= gpio_bank_saved
[bank
].inen
;
848 gpio_array
[bank
]->port_dir_set
= gpio_bank_saved
[bank
].dir
;
849 gpio_array
[bank
]->port_set
= gpio_bank_saved
[bank
].data
850 | gpio_bank_saved
[bank
].dir
;
855 unsigned short get_gpio_dir(unsigned gpio
)
857 return (0x01 & (gpio_array
[gpio_bank(gpio
)]->port_dir_clear
>> gpio_sub_n(gpio
)));
859 EXPORT_SYMBOL(get_gpio_dir
);
861 #endif /* BF548_FAMILY */
863 /***********************************************************
865 * FUNCTIONS: Blackfin Peripheral Resource Allocation
869 * per Peripheral Identifier
872 * DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
875 *************************************************************
876 * MODIFICATION HISTORY :
877 **************************************************************/
880 int peripheral_request(unsigned short per
, const char *label
)
883 unsigned short ident
= P_IDENT(per
);
886 * Don't cares are pins with only one dedicated function
889 if (per
& P_DONTCARE
)
892 if (!(per
& P_DEFINED
))
895 if (check_gpio(ident
) < 0)
898 local_irq_save(flags
);
900 if (unlikely(reserved_gpio_map
[gpio_bank(ident
)] & gpio_bit(ident
))) {
903 "%s: Peripheral %d is already reserved as GPIO by %s !\n",
904 __func__
, ident
, get_label(ident
));
905 local_irq_restore(flags
);
909 if (unlikely(reserved_peri_map
[gpio_bank(ident
)] & gpio_bit(ident
))) {
911 u16 funct
= get_portmux(ident
);
914 * Pin functions like AMC address strobes my
915 * be requested and used by several drivers
918 if (!((per
& P_MAYSHARE
) && (funct
== P_FUNCT2MUX(per
)))) {
921 * Allow that the identical pin function can
922 * be requested from the same driver twice
925 if (cmp_label(ident
, label
) == 0)
930 "%s: Peripheral %d function %d is already reserved by %s !\n",
931 __func__
, ident
, P_FUNCT2MUX(per
), get_label(ident
));
932 local_irq_restore(flags
);
938 reserved_peri_map
[gpio_bank(ident
)] |= gpio_bit(ident
);
940 portmux_setup(ident
, P_FUNCT2MUX(per
));
941 port_setup(ident
, PERIPHERAL_USAGE
);
943 local_irq_restore(flags
);
944 set_label(ident
, label
);
948 EXPORT_SYMBOL(peripheral_request
);
951 int peripheral_request(unsigned short per
, const char *label
)
954 unsigned short ident
= P_IDENT(per
);
957 * Don't cares are pins with only one dedicated function
960 if (per
& P_DONTCARE
)
963 if (!(per
& P_DEFINED
))
966 local_irq_save(flags
);
968 if (!check_gpio(ident
)) {
970 if (unlikely(reserved_gpio_map
[gpio_bank(ident
)] & gpio_bit(ident
))) {
973 "%s: Peripheral %d is already reserved as GPIO by %s !\n",
974 __func__
, ident
, get_label(ident
));
975 local_irq_restore(flags
);
981 if (unlikely(reserved_peri_map
[gpio_bank(ident
)] & gpio_bit(ident
))) {
984 * Pin functions like AMC address strobes my
985 * be requested and used by several drivers
988 if (!(per
& P_MAYSHARE
)) {
991 * Allow that the identical pin function can
992 * be requested from the same driver twice
995 if (cmp_label(ident
, label
) == 0)
1000 "%s: Peripheral %d function %d is already"
1001 " reserved by %s !\n",
1002 __func__
, ident
, P_FUNCT2MUX(per
),
1004 local_irq_restore(flags
);
1011 portmux_setup(per
, P_FUNCT2MUX(per
));
1013 port_setup(ident
, PERIPHERAL_USAGE
);
1015 reserved_peri_map
[gpio_bank(ident
)] |= gpio_bit(ident
);
1016 local_irq_restore(flags
);
1017 set_label(ident
, label
);
1021 EXPORT_SYMBOL(peripheral_request
);
1024 int peripheral_request_list(const unsigned short per
[], const char *label
)
1029 for (cnt
= 0; per
[cnt
] != 0; cnt
++) {
1031 ret
= peripheral_request(per
[cnt
], label
);
1034 for ( ; cnt
> 0; cnt
--)
1035 peripheral_free(per
[cnt
- 1]);
1043 EXPORT_SYMBOL(peripheral_request_list
);
1045 void peripheral_free(unsigned short per
)
1047 unsigned long flags
;
1048 unsigned short ident
= P_IDENT(per
);
1050 if (per
& P_DONTCARE
)
1053 if (!(per
& P_DEFINED
))
1056 if (check_gpio(ident
) < 0)
1059 local_irq_save(flags
);
1061 if (unlikely(!(reserved_peri_map
[gpio_bank(ident
)] & gpio_bit(ident
)))) {
1062 local_irq_restore(flags
);
1066 if (!(per
& P_MAYSHARE
))
1067 port_setup(ident
, GPIO_USAGE
);
1069 reserved_peri_map
[gpio_bank(ident
)] &= ~gpio_bit(ident
);
1071 set_label(ident
, "free");
1073 local_irq_restore(flags
);
1075 EXPORT_SYMBOL(peripheral_free
);
1077 void peripheral_free_list(const unsigned short per
[])
1080 for (cnt
= 0; per
[cnt
] != 0; cnt
++)
1081 peripheral_free(per
[cnt
]);
1083 EXPORT_SYMBOL(peripheral_free_list
);
1085 /***********************************************************
1087 * FUNCTIONS: Blackfin GPIO Driver
1090 * gpio PIO Number between 0 and MAX_BLACKFIN_GPIOS
1093 * DESCRIPTION: Blackfin GPIO Driver API
1096 *************************************************************
1097 * MODIFICATION HISTORY :
1098 **************************************************************/
1100 int gpio_request(unsigned gpio
, const char *label
)
1102 unsigned long flags
;
1104 if (check_gpio(gpio
) < 0)
1107 local_irq_save(flags
);
1110 * Allow that the identical GPIO can
1111 * be requested from the same driver twice
1112 * Do nothing and return -
1115 if (cmp_label(gpio
, label
) == 0) {
1116 local_irq_restore(flags
);
1120 if (unlikely(reserved_gpio_map
[gpio_bank(gpio
)] & gpio_bit(gpio
))) {
1122 printk(KERN_ERR
"bfin-gpio: GPIO %d is already reserved by %s !\n",
1123 gpio
, get_label(gpio
));
1124 local_irq_restore(flags
);
1127 if (unlikely(reserved_peri_map
[gpio_bank(gpio
)] & gpio_bit(gpio
))) {
1130 "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
1131 gpio
, get_label(gpio
));
1132 local_irq_restore(flags
);
1136 reserved_gpio_map
[gpio_bank(gpio
)] |= gpio_bit(gpio
);
1138 local_irq_restore(flags
);
1140 port_setup(gpio
, GPIO_USAGE
);
1141 set_label(gpio
, label
);
1145 EXPORT_SYMBOL(gpio_request
);
1147 void gpio_free(unsigned gpio
)
1149 unsigned long flags
;
1151 if (check_gpio(gpio
) < 0)
1154 local_irq_save(flags
);
1156 if (unlikely(!(reserved_gpio_map
[gpio_bank(gpio
)] & gpio_bit(gpio
)))) {
1159 local_irq_restore(flags
);
1163 reserved_gpio_map
[gpio_bank(gpio
)] &= ~gpio_bit(gpio
);
1165 set_label(gpio
, "free");
1167 local_irq_restore(flags
);
1169 EXPORT_SYMBOL(gpio_free
);
1173 int gpio_direction_input(unsigned gpio
)
1175 unsigned long flags
;
1177 if (!(reserved_gpio_map
[gpio_bank(gpio
)] & gpio_bit(gpio
))) {
1182 local_irq_save(flags
);
1183 gpio_array
[gpio_bank(gpio
)]->port_dir_clear
= gpio_bit(gpio
);
1184 gpio_array
[gpio_bank(gpio
)]->port_inen
|= gpio_bit(gpio
);
1185 local_irq_restore(flags
);
1189 EXPORT_SYMBOL(gpio_direction_input
);
1191 int gpio_direction_output(unsigned gpio
, int value
)
1193 unsigned long flags
;
1195 if (!(reserved_gpio_map
[gpio_bank(gpio
)] & gpio_bit(gpio
))) {
1200 local_irq_save(flags
);
1201 gpio_array
[gpio_bank(gpio
)]->port_inen
&= ~gpio_bit(gpio
);
1202 gpio_set_value(gpio
, value
);
1203 gpio_array
[gpio_bank(gpio
)]->port_dir_set
= gpio_bit(gpio
);
1204 local_irq_restore(flags
);
1208 EXPORT_SYMBOL(gpio_direction_output
);
1210 void gpio_set_value(unsigned gpio
, int arg
)
1213 gpio_array
[gpio_bank(gpio
)]->port_set
= gpio_bit(gpio
);
1215 gpio_array
[gpio_bank(gpio
)]->port_clear
= gpio_bit(gpio
);
1217 EXPORT_SYMBOL(gpio_set_value
);
1219 int gpio_get_value(unsigned gpio
)
1221 return (1 & (gpio_array
[gpio_bank(gpio
)]->port_data
>> gpio_sub_n(gpio
)));
1223 EXPORT_SYMBOL(gpio_get_value
);
1225 void bfin_gpio_irq_prepare(unsigned gpio
)
1227 unsigned long flags
;
1229 port_setup(gpio
, GPIO_USAGE
);
1231 local_irq_save(flags
);
1232 gpio_array
[gpio_bank(gpio
)]->port_dir_clear
= gpio_bit(gpio
);
1233 gpio_array
[gpio_bank(gpio
)]->port_inen
|= gpio_bit(gpio
);
1234 local_irq_restore(flags
);
1239 int gpio_get_value(unsigned gpio
)
1241 unsigned long flags
;
1244 if (unlikely(get_gpio_edge(gpio
))) {
1245 local_irq_save(flags
);
1246 set_gpio_edge(gpio
, 0);
1247 ret
= get_gpio_data(gpio
);
1248 set_gpio_edge(gpio
, 1);
1249 local_irq_restore(flags
);
1253 return get_gpio_data(gpio
);
1255 EXPORT_SYMBOL(gpio_get_value
);
1258 int gpio_direction_input(unsigned gpio
)
1260 unsigned long flags
;
1262 if (!(reserved_gpio_map
[gpio_bank(gpio
)] & gpio_bit(gpio
))) {
1267 local_irq_save(flags
);
1268 gpio_bankb
[gpio_bank(gpio
)]->dir
&= ~gpio_bit(gpio
);
1269 gpio_bankb
[gpio_bank(gpio
)]->inen
|= gpio_bit(gpio
);
1270 AWA_DUMMY_READ(inen
);
1271 local_irq_restore(flags
);
1275 EXPORT_SYMBOL(gpio_direction_input
);
1277 int gpio_direction_output(unsigned gpio
, int value
)
1279 unsigned long flags
;
1281 if (!(reserved_gpio_map
[gpio_bank(gpio
)] & gpio_bit(gpio
))) {
1286 local_irq_save(flags
);
1287 gpio_bankb
[gpio_bank(gpio
)]->inen
&= ~gpio_bit(gpio
);
1290 gpio_bankb
[gpio_bank(gpio
)]->data_set
= gpio_bit(gpio
);
1292 gpio_bankb
[gpio_bank(gpio
)]->data_clear
= gpio_bit(gpio
);
1294 gpio_bankb
[gpio_bank(gpio
)]->dir
|= gpio_bit(gpio
);
1295 AWA_DUMMY_READ(dir
);
1296 local_irq_restore(flags
);
1300 EXPORT_SYMBOL(gpio_direction_output
);
1302 /* If we are booting from SPI and our board lacks a strong enough pull up,
1303 * the core can reset and execute the bootrom faster than the resistor can
1304 * pull the signal logically high. To work around this (common) error in
1305 * board design, we explicitly set the pin back to GPIO mode, force /CS
1306 * high, and wait for the electrons to do their thing.
1308 * This function only makes sense to be called from reset code, but it
1309 * lives here as we need to force all the GPIO states w/out going through
1310 * BUG() checks and such.
1312 void bfin_gpio_reset_spi0_ssel1(void)
1314 u16 gpio
= P_IDENT(P_SPI0_SSEL1
);
1316 port_setup(gpio
, GPIO_USAGE
);
1317 gpio_bankb
[gpio_bank(gpio
)]->data_set
= gpio_bit(gpio
);
1318 AWA_DUMMY_READ(data_set
);
1322 void bfin_gpio_irq_prepare(unsigned gpio
)
1324 port_setup(gpio
, GPIO_USAGE
);
1327 #endif /*BF548_FAMILY */
1329 #if defined(CONFIG_PROC_FS)
1330 static int gpio_proc_read(char *buf
, char **start
, off_t offset
,
1331 int len
, int *unused_i
, void *unused_v
)
1335 for (c
= 0; c
< MAX_RESOURCES
; c
++) {
1336 if (!check_gpio(c
) && (reserved_gpio_map
[gpio_bank(c
)] & gpio_bit(c
)))
1337 len
= sprintf(buf
, "GPIO_%d: %s \t\tGPIO %s\n", c
,
1338 get_label(c
), get_gpio_dir(c
) ? "OUTPUT" : "INPUT");
1339 else if (reserved_peri_map
[gpio_bank(c
)] & gpio_bit(c
))
1340 len
= sprintf(buf
, "GPIO_%d: %s \t\tPeripheral\n", c
, get_label(c
));
1349 static __init
int gpio_register_proc(void)
1351 struct proc_dir_entry
*proc_gpio
;
1353 proc_gpio
= create_proc_entry("gpio", S_IRUGO
, NULL
);
1355 proc_gpio
->read_proc
= gpio_proc_read
;
1356 return proc_gpio
!= NULL
;
1358 __initcall(gpio_register_proc
);