1 files changed, 213 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath5k/gpio.c b/drivers/net/wireless/ath/ath5k/gpio.c
new file mode 100644
index 0000000..73d3dd8
--- /dev/null
+++ b/drivers/net/wireless/ath/ath5k/gpio.c
@@ -0,0 +1,213 @@
+/*
+ * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
+ * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+/****************\
+  GPIO Functions
+\****************/
+
+#include "ath5k.h"
+#include "reg.h"
+#include "debug.h"
+
+
+/**
+ * DOC: GPIO/LED functions
+ *
+ * Here we control the 6 bidirectional GPIO pins provided by the hw.
+ * We can set a GPIO pin to be an input or an output pin on GPIO control
+ * register and then read or set its status from GPIO data input/output
+ * registers.
+ *
+ * We also control the two LED pins provided by the hw, LED_0 is our
+ * "power" LED and LED_1 is our "network activity" LED but many scenarios
+ * are available from hw. Vendors might also provide LEDs connected to the
+ * GPIO pins, we handle them through the LED subsystem on led.c
+ */
+
+
+/**
+ * ath5k_hw_set_ledstate() - Set led state
+ * @ah: The &struct ath5k_hw
+ * @state: One of AR5K_LED_*
+ *
+ * Used to set the LED blinking state. This only
+ * works for the LED connected to the LED_0, LED_1 pins,
+ * not the GPIO based.
+ */
+void
+ath5k_hw_set_ledstate(struct ath5k_hw *ah, unsigned int state)
+{
+	u32 led;
+	/*5210 has different led mode handling*/
+	u32 led_5210;
+
+	/*Reset led status*/
+	if (ah->ah_version != AR5K_AR5210)
+		AR5K_REG_DISABLE_BITS(ah, AR5K_PCICFG,
+			AR5K_PCICFG_LEDMODE |  AR5K_PCICFG_LED);
+	else
+		AR5K_REG_DISABLE_BITS(ah, AR5K_PCICFG, AR5K_PCICFG_LED);
+
+	/*
+	 * Some blinking values, define at your wish
+	 */
+	switch (state) {
+	case AR5K_LED_SCAN:
+	case AR5K_LED_AUTH:
+		led = AR5K_PCICFG_LEDMODE_PROP | AR5K_PCICFG_LED_PEND;
+		led_5210 = AR5K_PCICFG_LED_PEND | AR5K_PCICFG_LED_BCTL;
+		break;
+
+	case AR5K_LED_INIT:
+		led = AR5K_PCICFG_LEDMODE_PROP | AR5K_PCICFG_LED_NONE;
+		led_5210 = AR5K_PCICFG_LED_PEND;
+		break;
+
+	case AR5K_LED_ASSOC:
+	case AR5K_LED_RUN:
+		led = AR5K_PCICFG_LEDMODE_PROP | AR5K_PCICFG_LED_ASSOC;
+		led_5210 = AR5K_PCICFG_LED_ASSOC;
+		break;
+
+	default:
+		led = AR5K_PCICFG_LEDMODE_PROM | AR5K_PCICFG_LED_NONE;
+		led_5210 = AR5K_PCICFG_LED_PEND;
+		break;
+	}
+
+	/*Write new status to the register*/
+	if (ah->ah_version != AR5K_AR5210)
+		AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, led);
+	else
+		AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, led_5210);
+}
+
+/**
+ * ath5k_hw_set_gpio_input() - Set GPIO inputs
+ * @ah: The &struct ath5k_hw
+ * @gpio: GPIO pin to set as input
+ */
+int
+ath5k_hw_set_gpio_input(struct ath5k_hw *ah, u32 gpio)
+{
+	if (gpio >= AR5K_NUM_GPIO)
+		return -EINVAL;
+
+	ath5k_hw_reg_write(ah,
+		(ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio))
+		| AR5K_GPIOCR_IN(gpio), AR5K_GPIOCR);
+
+	return 0;
+}
+
+/**
+ * ath5k_hw_set_gpio_output() - Set GPIO outputs
+ * @ah: The &struct ath5k_hw
+ * @gpio: The GPIO pin to set as output
+ */
+int
+ath5k_hw_set_gpio_output(struct ath5k_hw *ah, u32 gpio)
+{
+	if (gpio >= AR5K_NUM_GPIO)
+		return -EINVAL;
+
+	ath5k_hw_reg_write(ah,
+		(ath5k_hw_reg_read(ah, AR5K_GPIOCR) & ~AR5K_GPIOCR_OUT(gpio))
+		| AR5K_GPIOCR_OUT(gpio), AR5K_GPIOCR);
+
+	return 0;
+}
+
+/**
+ * ath5k_hw_get_gpio() - Get GPIO state
+ * @ah: The &struct ath5k_hw
+ * @gpio: The GPIO pin to read
+ */
+u32
+ath5k_hw_get_gpio(struct ath5k_hw *ah, u32 gpio)
+{
+	if (gpio >= AR5K_NUM_GPIO)
+		return 0xffffffff;
+
+	/* GPIO input magic */
+	return ((ath5k_hw_reg_read(ah, AR5K_GPIODI) & AR5K_GPIODI_M) >> gpio) &
+		0x1;
+}
+
+/**
+ * ath5k_hw_set_gpio() - Set GPIO state
+ * @ah: The &struct ath5k_hw
+ * @gpio: The GPIO pin to set
+ * @val: Value to set (boolean)
+ */
+int
+ath5k_hw_set_gpio(struct ath5k_hw *ah, u32 gpio, u32 val)
+{
+	u32 data;
+
+	if (gpio >= AR5K_NUM_GPIO)
+		return -EINVAL;
+
+	/* GPIO output magic */
+	data = ath5k_hw_reg_read(ah, AR5K_GPIODO);
+
+	data &= ~(1 << gpio);
+	data |= (val & 1) << gpio;
+
+	ath5k_hw_reg_write(ah, data, AR5K_GPIODO);
+
+	return 0;
+}
+
+/**
+ * ath5k_hw_set_gpio_intr() - Initialize the GPIO interrupt (RFKill switch)
+ * @ah: The &struct ath5k_hw
+ * @gpio: The GPIO pin to use
+ * @interrupt_level: True to generate interrupt on active pin (high)
+ *
+ * This function is used to set up the GPIO interrupt for the hw RFKill switch.
+ * That switch is connected to a GPIO pin and it's number is stored on EEPROM.
+ * It can either open or close the circuit to indicate that we should disable
+ * RF/Wireless to save power (we also get that from EEPROM).
+ */
+void
+ath5k_hw_set_gpio_intr(struct ath5k_hw *ah, unsigned int gpio,
+		u32 interrupt_level)
+{
+	u32 data;
+
+	if (gpio >= AR5K_NUM_GPIO)
+		return;
+
+	/*
+	 * Set the GPIO interrupt
+	 */
+	data = (ath5k_hw_reg_read(ah, AR5K_GPIOCR) &
+		~(AR5K_GPIOCR_INT_SEL(gpio) | AR5K_GPIOCR_INT_SELH |
+		AR5K_GPIOCR_INT_ENA | AR5K_GPIOCR_OUT(gpio))) |
+		(AR5K_GPIOCR_INT_SEL(gpio) | AR5K_GPIOCR_INT_ENA);
+
+	ath5k_hw_reg_write(ah, interrupt_level ? data :
+		(data | AR5K_GPIOCR_INT_SELH), AR5K_GPIOCR);
+
+	ah->ah_imr |= AR5K_IMR_GPIO;
+
+	/* Enable GPIO interrupts */
+	AR5K_REG_ENABLE_BITS(ah, AR5K_PIMR, AR5K_IMR_GPIO);
+}
+