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Diffstat (limited to 'gpxe/src/drivers/net/ath5k/ath5k_gpio.c')
-rw-r--r--gpxe/src/drivers/net/ath5k/ath5k_gpio.c122
1 files changed, 122 insertions, 0 deletions
diff --git a/gpxe/src/drivers/net/ath5k/ath5k_gpio.c b/gpxe/src/drivers/net/ath5k/ath5k_gpio.c
new file mode 100644
index 00000000..0e8a3e68
--- /dev/null
+++ b/gpxe/src/drivers/net/ath5k/ath5k_gpio.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
+ * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
+ *
+ * Lightly modified for gPXE, July 2009, by Joshua Oreman <oremanj@rwcr.net>.
+ *
+ * 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.
+ *
+ */
+
+FILE_LICENCE ( MIT );
+
+/****************\
+ GPIO Functions
+\****************/
+
+#include "ath5k.h"
+#include "reg.h"
+#include "base.h"
+
+/*
+ * Set GPIO inputs
+ */
+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;
+}
+
+/*
+ * Set GPIO outputs
+ */
+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;
+}
+
+/*
+ * Get GPIO state
+ */
+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;
+}
+
+/*
+ * Set GPIO state
+ */
+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;
+}
+
+/*
+ * Initialize the GPIO interrupt (RFKill switch)
+ */
+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);
+}
+