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 */