Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / powerpc / include / asm / mpc85xx_gpio.h

diff --git a/qemu/roms/u-boot/arch/powerpc/include/asm/mpc85xx_gpio.h b/qemu/roms/u-boot/arch/powerpc/include/asm/mpc85xx_gpio.h
new file mode 100644 (file)
index 0000000..87bb4a0
--- /dev/null
+++ b/qemu/roms/u-boot/arch/powerpc/include/asm/mpc85xx_gpio.h
@@ -0,0 +1,113 @@
+/*
+ * Copyright 2010 eXMeritus, A Boeing Company
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef POWERPC_ASM_MPC85XX_GPIO_H_
+#define POWERPC_ASM_MPC85XX_GPIO_H_
+
+# include <asm/immap_85xx.h>
+
+/*
+ * The following internal functions are an MPC85XX-specific GPIO API which
+ * allows setting and querying multiple GPIOs in a single operation.
+ *
+ * All of these look relatively large, but the arguments are almost always
+ * constants, so they compile down to just a few instructions and a
+ * memory-mapped IO operation or two.
+ */
+static inline void mpc85xx_gpio_set(unsigned int mask,
+               unsigned int dir, unsigned int val)
+{
+       ccsr_gpio_t *gpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR);
+
+       /* First mask off the unwanted parts of "dir" and "val" */
+       dir &= mask;
+       val &= mask;
+
+       /* Now read in the values we're supposed to preserve */
+       dir |= (in_be32(&gpio->gpdir) & ~mask);
+       val |= (in_be32(&gpio->gpdat) & ~mask);
+
+       /*
+        * Poke the new output values first, then set the direction.  This
+        * helps to avoid transient data when switching from input to output
+        * and vice versa.
+        */
+       out_be32(&gpio->gpdat, val);
+       out_be32(&gpio->gpdir, dir);
+}
+
+static inline void mpc85xx_gpio_set_in(unsigned int gpios)
+{
+       mpc85xx_gpio_set(gpios, 0x00000000, 0x00000000);
+}
+
+static inline void mpc85xx_gpio_set_low(unsigned int gpios)
+{
+       mpc85xx_gpio_set(gpios, 0xFFFFFFFF, 0x00000000);
+}
+
+static inline void mpc85xx_gpio_set_high(unsigned int gpios)
+{
+       mpc85xx_gpio_set(gpios, 0xFFFFFFFF, 0xFFFFFFFF);
+}
+
+static inline unsigned int mpc85xx_gpio_get(unsigned int mask)
+{
+       ccsr_gpio_t *gpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR);
+
+       /* Read the requested values */
+       return in_be32(&gpio->gpdat) & mask;
+}
+
+/*
+ * These implement the generic Linux GPIO API on top of the other functions
+ * in this header.
+ */
+static inline int gpio_request(unsigned gpio, const char *label)
+{
+       /* Compatibility shim */
+       return 0;
+}
+
+static inline void gpio_free(unsigned gpio)
+{
+       /* Compatibility shim */
+}
+
+static inline int gpio_direction_input(unsigned gpio)
+{
+       mpc85xx_gpio_set_in(1U << gpio);
+       return 0;
+}
+
+static inline int gpio_direction_output(unsigned gpio, int value)
+{
+       if (value)
+               mpc85xx_gpio_set_high(1U << gpio);
+       else
+               mpc85xx_gpio_set_low(1U << gpio);
+       return 0;
+}
+
+static inline int gpio_get_value(unsigned gpio)
+{
+       return !!mpc85xx_gpio_get(1U << gpio);
+}
+
+static inline void gpio_set_value(unsigned gpio, int value)
+{
+       if (value)
+               mpc85xx_gpio_set_high(1U << gpio);
+       else
+               mpc85xx_gpio_set_low(1U << gpio);
+}
+
+static inline int gpio_is_valid(int gpio)
+{
+       return (gpio >= 0) && (gpio < 32);
+}
+
+#endif /* not POWERPC_ASM_MPC85XX_GPIO_H_ */