2 * linux/arch/arm/mach-pxa/mfp-pxa2xx.c
4 * PXA2xx pin mux configuration support
6 * The GPIOs on PXA2xx can be configured as one of many alternate
7 * functions, this is by concept samilar to the MFP configuration
8 * on PXA3xx, what's more important, the low power pin state and
9 * wakeup detection are also supported by the same framework.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/module.h>
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/sysdev.h>
21 #include <asm/arch/hardware.h>
22 #include <asm/arch/pxa-regs.h>
23 #include <asm/arch/mfp-pxa2xx.h>
27 #define PGSR(x) __REG2(0x40F00020, ((x) & 0x60) >> 3)
29 #define PWER_WE35 (1 << 24)
33 unsigned can_wakeup
: 1;
34 unsigned keypad_gpio
: 1;
35 unsigned int mask
; /* bit mask in PWER or PKWR */
39 static struct gpio_desc gpio_desc
[MFP_PIN_GPIO127
+ 1];
41 static int __mfp_config_gpio(unsigned gpio
, unsigned long c
)
43 unsigned long gafr
, mask
= GPIO_bit(gpio
);
50 /* alternate function and direction */
51 gafr
= GAFR(gpio
) & ~(0x3 << ((gpio
& 0xf) * 2));
52 GAFR(gpio
) = gafr
| (fn
<< ((gpio
& 0xf) * 2));
60 switch (c
& MFP_LPM_STATE_MASK
) {
61 case MFP_LPM_DRIVE_HIGH
:
64 case MFP_LPM_DRIVE_LOW
:
70 pr_warning("%s: invalid low power state for GPIO%d\n",
75 /* give early warning if MFP_LPM_CAN_WAKEUP is set on the
76 * configurations of those pins not able to wakeup
78 if ((c
& MFP_LPM_CAN_WAKEUP
) && !gpio_desc
[gpio
].can_wakeup
) {
79 pr_warning("%s: GPIO%d unable to wakeup\n",
84 if ((c
& MFP_LPM_CAN_WAKEUP
) && (c
& MFP_DIR_OUT
)) {
85 pr_warning("%s: output GPIO%d unable to wakeup\n",
93 void pxa2xx_mfp_config(unsigned long *mfp_cfgs
, int num
)
99 for (i
= 0, c
= mfp_cfgs
; i
< num
; i
++, c
++) {
101 gpio
= mfp_to_gpio(MFP_PIN(*c
));
103 if (!gpio_desc
[gpio
].valid
) {
104 pr_warning("%s: GPIO%d is invalid pin\n",
109 local_irq_save(flags
);
111 gpio_desc
[gpio
].config
= *c
;
112 __mfp_config_gpio(gpio
, *c
);
114 local_irq_restore(flags
);
118 int gpio_set_wake(unsigned int gpio
, unsigned int on
)
123 if (gpio
> mfp_to_gpio(MFP_PIN_GPIO127
))
126 d
= &gpio_desc
[gpio
];
135 if (d
->can_wakeup
&& (c
& MFP_LPM_CAN_WAKEUP
)) {
139 if (c
& MFP_LPM_EDGE_RISE
)
144 if (c
& MFP_LPM_EDGE_FALL
)
158 static int __init
pxa25x_mfp_init(void)
162 if (cpu_is_pxa25x()) {
163 for (i
= 0; i
<= 84; i
++)
164 gpio_desc
[i
].valid
= 1;
166 for (i
= 0; i
<= 15; i
++) {
167 gpio_desc
[i
].can_wakeup
= 1;
168 gpio_desc
[i
].mask
= GPIO_bit(i
);
174 postcore_initcall(pxa25x_mfp_init
);
175 #endif /* CONFIG_PXA25x */
178 static int pxa27x_pkwr_gpio
[] = {
179 13, 16, 17, 34, 36, 37, 38, 39, 90, 91, 93, 94,
180 95, 96, 97, 98, 99, 100, 101, 102
183 int keypad_set_wake(unsigned int on
)
185 unsigned int i
, gpio
, mask
= 0;
192 for (i
= 0; i
< ARRAY_SIZE(pxa27x_pkwr_gpio
); i
++) {
194 gpio
= pxa27x_pkwr_gpio
[i
];
196 if (gpio_desc
[gpio
].config
& MFP_LPM_CAN_WAKEUP
)
197 mask
|= gpio_desc
[gpio
].mask
;
204 static int __init
pxa27x_mfp_init(void)
208 if (cpu_is_pxa27x()) {
209 for (i
= 0; i
<= 120; i
++) {
210 /* skip GPIO2, 5, 6, 7, 8, they are not
211 * valid pins allow configuration
213 if (i
== 2 || i
== 5 || i
== 6 ||
217 gpio_desc
[i
].valid
= 1;
221 for (i
= 0; i
< ARRAY_SIZE(pxa27x_pkwr_gpio
); i
++) {
222 gpio
= pxa27x_pkwr_gpio
[i
];
223 gpio_desc
[gpio
].can_wakeup
= 1;
224 gpio_desc
[gpio
].keypad_gpio
= 1;
225 gpio_desc
[gpio
].mask
= 1 << i
;
228 /* Overwrite GPIO13 as a PWER wakeup source */
229 for (i
= 0; i
<= 15; i
++) {
230 /* skip GPIO2, 5, 6, 7, 8 */
231 if (GPIO_bit(i
) & 0x1e4)
234 gpio_desc
[i
].can_wakeup
= 1;
235 gpio_desc
[i
].mask
= GPIO_bit(i
);
238 gpio_desc
[35].can_wakeup
= 1;
239 gpio_desc
[35].mask
= PWER_WE35
;
244 postcore_initcall(pxa27x_mfp_init
);
245 #endif /* CONFIG_PXA27x */
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