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1/*2 * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>3 * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>4 *5 * Permission to use, copy, modify, and distribute this software for any6 * purpose with or without fee is hereby granted, provided that the above7 * copyright notice and this permission notice appear in all copies.8 *9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.16 *17 */18 19/****************\20 GPIO Functions21\****************/22 23#include "ath5k.h"24#include "reg.h"25#include "debug.h"26 27 28/**29 * DOC: GPIO/LED functions30 *31 * Here we control the 6 bidirectional GPIO pins provided by the hw.32 * We can set a GPIO pin to be an input or an output pin on GPIO control33 * register and then read or set its status from GPIO data input/output34 * registers.35 *36 * We also control the two LED pins provided by the hw, LED_0 is our37 * "power" LED and LED_1 is our "network activity" LED but many scenarios38 * are available from hw. Vendors might also provide LEDs connected to the39 * GPIO pins, we handle them through the LED subsystem on led.c40 */41 42 43/**44 * ath5k_hw_set_ledstate() - Set led state45 * @ah: The &struct ath5k_hw46 * @state: One of AR5K_LED_*47 *48 * Used to set the LED blinking state. This only49 * works for the LED connected to the LED_0, LED_1 pins,50 * not the GPIO based.51 */52void53ath5k_hw_set_ledstate(struct ath5k_hw *ah, unsigned int state)54{55 u32 led;56 /*5210 has different led mode handling*/57 u32 led_5210;58 59 /*Reset led status*/60 if (ah->ah_version != AR5K_AR5210)61 AR5K_REG_DISABLE_BITS(ah, AR5K_PCICFG,62 AR5K_PCICFG_LEDMODE | AR5K_PCICFG_LED);63 else64 AR5K_REG_DISABLE_BITS(ah, AR5K_PCICFG, AR5K_PCICFG_LED);65 66 /*67 * Some blinking values, define at your wish68 */69 switch (state) {70 case AR5K_LED_SCAN:71 case AR5K_LED_AUTH:72 led = AR5K_PCICFG_LEDMODE_PROP | AR5K_PCICFG_LED_PEND;73 led_5210 = AR5K_PCICFG_LED_PEND | AR5K_PCICFG_LED_BCTL;74 break;75 76 case AR5K_LED_INIT:77 led = AR5K_PCICFG_LEDMODE_PROP | AR5K_PCICFG_LED_NONE;78 led_5210 = AR5K_PCICFG_LED_PEND;79 break;80 81 case AR5K_LED_ASSOC:82 case AR5K_LED_RUN:83 led = AR5K_PCICFG_LEDMODE_PROP | AR5K_PCICFG_LED_ASSOC;84 led_5210 = AR5K_PCICFG_LED_ASSOC;85 break;86 87 default:88 led = AR5K_PCICFG_LEDMODE_PROM | AR5K_PCICFG_LED_NONE;89 led_5210 = AR5K_PCICFG_LED_PEND;90 break;91 }92 93 /*Write new status to the register*/94 if (ah->ah_version != AR5K_AR5210)95 AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, led);96 else97 AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, led_5210);98}99 100/**101 * ath5k_hw_set_gpio_input() - Set GPIO inputs102 * @ah: The &struct ath5k_hw103 * @gpio: GPIO pin to set as input104 */105int106ath5k_hw_set_gpio_input(struct ath5k_hw *ah, u32 gpio)107{108 if (gpio >= AR5K_NUM_GPIO)109 return -EINVAL;110 111 ath5k_hw_reg_write(ah,112 (ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio))113 | AR5K_GPIOCR_IN(gpio), AR5K_GPIOCR);114 115 return 0;116}117 118/**119 * ath5k_hw_set_gpio_output() - Set GPIO outputs120 * @ah: The &struct ath5k_hw121 * @gpio: The GPIO pin to set as output122 */123int124ath5k_hw_set_gpio_output(struct ath5k_hw *ah, u32 gpio)125{126 if (gpio >= AR5K_NUM_GPIO)127 return -EINVAL;128 129 ath5k_hw_reg_write(ah,130 (ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio))131 | AR5K_GPIOCR_OUT(gpio), AR5K_GPIOCR);132 133 return 0;134}135 136/**137 * ath5k_hw_get_gpio() - Get GPIO state138 * @ah: The &struct ath5k_hw139 * @gpio: The GPIO pin to read140 */141u32142ath5k_hw_get_gpio(struct ath5k_hw *ah, u32 gpio)143{144 if (gpio >= AR5K_NUM_GPIO)145 return 0xffffffff;146 147 /* GPIO input magic */148 return ((ath5k_hw_reg_read(ah, AR5K_GPIODI) & AR5K_GPIODI_M) >> gpio) &149 0x1;150}151 152/**153 * ath5k_hw_set_gpio() - Set GPIO state154 * @ah: The &struct ath5k_hw155 * @gpio: The GPIO pin to set156 * @val: Value to set (boolean)157 */158int159ath5k_hw_set_gpio(struct ath5k_hw *ah, u32 gpio, u32 val)160{161 u32 data;162 163 if (gpio >= AR5K_NUM_GPIO)164 return -EINVAL;165 166 /* GPIO output magic */167 data = ath5k_hw_reg_read(ah, AR5K_GPIODO);168 169 data &= ~(1 << gpio);170 data |= (val & 1) << gpio;171 172 ath5k_hw_reg_write(ah, data, AR5K_GPIODO);173 174 return 0;175}176 177/**178 * ath5k_hw_set_gpio_intr() - Initialize the GPIO interrupt (RFKill switch)179 * @ah: The &struct ath5k_hw180 * @gpio: The GPIO pin to use181 * @interrupt_level: True to generate interrupt on active pin (high)182 *183 * This function is used to set up the GPIO interrupt for the hw RFKill switch.184 * That switch is connected to a GPIO pin and it's number is stored on EEPROM.185 * It can either open or close the circuit to indicate that we should disable186 * RF/Wireless to save power (we also get that from EEPROM).187 */188void189ath5k_hw_set_gpio_intr(struct ath5k_hw *ah, unsigned int gpio,190 u32 interrupt_level)191{192 u32 data;193 194 if (gpio >= AR5K_NUM_GPIO)195 return;196 197 /*198 * Set the GPIO interrupt199 */200 data = (ath5k_hw_reg_read(ah, AR5K_GPIOCR) &201 ~(AR5K_GPIOCR_INT_SEL(gpio) | AR5K_GPIOCR_INT_SELH |202 AR5K_GPIOCR_INT_ENA | AR5K_GPIOCR_OUT(gpio))) |203 (AR5K_GPIOCR_INT_SEL(gpio) | AR5K_GPIOCR_INT_ENA);204 205 ath5k_hw_reg_write(ah, interrupt_level ? data :206 (data | AR5K_GPIOCR_INT_SELH), AR5K_GPIOCR);207 208 ah->ah_imr |= AR5K_IMR_GPIO;209 210 /* Enable GPIO interrupts */211 AR5K_REG_ENABLE_BITS(ah, AR5K_PIMR, AR5K_IMR_GPIO);212}213 214