* MA 02111-1307 USA
*/
+#ifndef __fdtdec_h
+#define __fdtdec_h
/*
* This file contains convenience functions for decoding useful and
*/
#ifdef CONFIG_PHYS_64BIT
typedef u64 fdt_addr_t;
+typedef u64 fdt_size_t;
#define FDT_ADDR_T_NONE (-1ULL)
#define fdt_addr_to_cpu(reg) be64_to_cpu(reg)
+#define fdt_size_to_cpu(reg) be64_to_cpu(reg)
#else
typedef u32 fdt_addr_t;
+typedef u32 fdt_size_t;
#define FDT_ADDR_T_NONE (-1U)
#define fdt_addr_to_cpu(reg) be32_to_cpu(reg)
+#define fdt_size_to_cpu(reg) be32_to_cpu(reg)
#endif
/* Information obtained about memory from the FDT */
*/
enum fdt_compat_id {
COMPAT_UNKNOWN,
- COMPAT_NVIDIA_TEGRA20_USB, /* Tegra2 USB port */
- COMPAT_NVIDIA_TEGRA20_I2C, /* Tegra2 i2c */
- COMPAT_NVIDIA_TEGRA20_DVC, /* Tegra2 dvc (really just i2c) */
- COMPAT_NVIDIA_TEGRA20_EMC, /* Tegra2 memory controller */
- COMPAT_NVIDIA_TEGRA20_EMC_TABLE, /* Tegra2 memory timing table */
- COMPAT_NVIDIA_TEGRA20_KBC, /* Tegra2 Keyboard */
+ COMPAT_NVIDIA_TEGRA20_USB, /* Tegra20 USB port */
+ COMPAT_NVIDIA_TEGRA114_I2C, /* Tegra114 I2C w/single clock source */
+ COMPAT_NVIDIA_TEGRA20_I2C, /* Tegra20 i2c */
+ COMPAT_NVIDIA_TEGRA20_DVC, /* Tegra20 dvc (really just i2c) */
+ COMPAT_NVIDIA_TEGRA20_EMC, /* Tegra20 memory controller */
+ COMPAT_NVIDIA_TEGRA20_EMC_TABLE, /* Tegra20 memory timing table */
+ COMPAT_NVIDIA_TEGRA20_KBC, /* Tegra20 Keyboard */
+ COMPAT_NVIDIA_TEGRA20_NAND, /* Tegra2 NAND controller */
+ COMPAT_NVIDIA_TEGRA20_PWM, /* Tegra 2 PWM controller */
+ COMPAT_NVIDIA_TEGRA20_DC, /* Tegra 2 Display controller */
+ COMPAT_NVIDIA_TEGRA30_SDMMC, /* Tegra30 SDMMC controller */
+ COMPAT_NVIDIA_TEGRA20_SDMMC, /* Tegra20 SDMMC controller */
+ COMPAT_NVIDIA_TEGRA20_SFLASH, /* Tegra 2 SPI flash controller */
+ COMPAT_NVIDIA_TEGRA20_SLINK, /* Tegra 2 SPI SLINK controller */
+ COMPAT_NVIDIA_TEGRA114_SPI, /* Tegra 114 SPI controller */
+ COMPAT_SMSC_LAN9215, /* SMSC 10/100 Ethernet LAN9215 */
+ COMPAT_SAMSUNG_EXYNOS5_SROMC, /* Exynos5 SROMC */
+ COMPAT_SAMSUNG_S3C2440_I2C, /* Exynos I2C Controller */
+ COMPAT_SAMSUNG_EXYNOS5_SOUND, /* Exynos Sound */
+ COMPAT_WOLFSON_WM8994_CODEC, /* Wolfson WM8994 Sound Codec */
+ COMPAT_SAMSUNG_EXYNOS_SPI, /* Exynos SPI */
+ COMPAT_SAMSUNG_EXYNOS_EHCI, /* Exynos EHCI controller */
+ COMPAT_SAMSUNG_EXYNOS_USB_PHY, /* Exynos phy controller for usb2.0 */
+ COMPAT_SAMSUNG_EXYNOS_TMU, /* Exynos TMU */
+ COMPAT_SAMSUNG_EXYNOS_FIMD, /* Exynos Display controller */
+ COMPAT_SAMSUNG_EXYNOS5_DP, /* Exynos Display port controller */
+ COMPAT_MAXIM_MAX77686_PMIC, /* MAX77686 PMIC */
+ COMPAT_GENERIC_SPI_FLASH, /* Generic SPI Flash chip */
+ COMPAT_MAXIM_98095_CODEC, /* MAX98095 Codec */
+ COMPAT_INFINEON_SLB9635_TPM, /* Infineon SLB9635 TPM */
COMPAT_COUNT,
};
/* This tells us whether a fdt_gpio_state record is valid or not */
#define fdt_gpio_isvalid(x) ((x)->gpio != FDT_GPIO_NONE)
+/**
+ * Read the GPIO taking into account the polarity of the pin.
+ *
+ * @param gpio pointer to the decoded gpio
+ * @return value of the gpio if successful, < 0 if unsuccessful
+ */
+int fdtdec_get_gpio(struct fdt_gpio_state *gpio);
+
+/**
+ * Write the GPIO taking into account the polarity of the pin.
+ *
+ * @param gpio pointer to the decoded gpio
+ * @return 0 if successful
+ */
+int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val);
+
/**
* Find the next numbered alias for a peripheral. This is used to enumerate
* all the peripherals of a certain type.
int fdtdec_next_alias(const void *blob, const char *name,
enum fdt_compat_id id, int *upto);
+/**
+ * Find the compatible ID for a given node.
+ *
+ * Generally each node has at least one compatible string attached to it.
+ * This function looks through our list of known compatible strings and
+ * returns the corresponding ID which matches the compatible string.
+ *
+ * @param blob FDT blob to use
+ * @param node Node containing compatible string to find
+ * @return compatible ID, or COMPAT_UNKNOWN if we cannot find a match
+ */
+enum fdt_compat_id fdtdec_lookup(const void *blob, int node);
+
/**
* Find the next compatible node for a peripheral.
*
fdt_addr_t fdtdec_get_addr(const void *blob, int node,
const char *prop_name);
+/**
+ * Look up an address property in a node and return it as an address.
+ * The property must hold one address with a length. This is only tested
+ * on 32-bit machines.
+ *
+ * @param blob FDT blob
+ * @param node node to examine
+ * @param prop_name name of property to find
+ * @return address, if found, or FDT_ADDR_T_NONE if not
+ */
+fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
+ const char *prop_name, fdt_size_t *sizep);
+
/**
* Look up a 32-bit integer property in a node and return it. The property
* must have at least 4 bytes of data. The value of the first cell is
s32 fdtdec_get_int(const void *blob, int node, const char *prop_name,
s32 default_val);
+/**
+ * Look up a 64-bit integer property in a node and return it. The property
+ * must have at least 8 bytes of data (2 cells). The first two cells are
+ * concatenated to form a 8 bytes value, where the first cell is top half and
+ * the second cell is bottom half.
+ *
+ * @param blob FDT blob
+ * @param node node to examine
+ * @param prop_name name of property to find
+ * @param default_val default value to return if the property is not found
+ * @return integer value, if found, or default_val if not
+ */
+uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
+ uint64_t default_val);
+
/**
* Checks whether a node is enabled.
* This looks for a 'status' property. If this exists, then returns 1 if
int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
struct fdt_gpio_state *gpio);
+/**
+ * Decode a list of GPIOs from an FDT. This creates a list of GPIOs with no
+ * terminating item.
+ *
+ * @param blob FDT blob to use
+ * @param node Node to look at
+ * @param prop_name Node property name
+ * @param gpio Array of gpio elements to fill from FDT. This will be
+ * untouched if either 0 or an error is returned
+ * @param max_count Maximum number of elements allowed
+ * @return number of GPIOs read if ok, -FDT_ERR_BADLAYOUT if max_count would
+ * be exceeded, or -FDT_ERR_NOTFOUND if the property is missing.
+ */
+int fdtdec_decode_gpios(const void *blob, int node, const char *prop_name,
+ struct fdt_gpio_state *gpio, int max_count);
+
/**
* Set up a GPIO pin according to the provided gpio information. At present this
* just requests the GPIO.
*/
int fdtdec_setup_gpio(struct fdt_gpio_state *gpio);
+/**
+ * Look in the FDT for a config item with the given name and return its value
+ * as a 32-bit integer. The property must have at least 4 bytes of data. The
+ * value of the first cell is returned.
+ *
+ * @param blob FDT blob to use
+ * @param prop_name Node property name
+ * @param default_val default value to return if the property is not found
+ * @return integer value, if found, or default_val if not
+ */
+int fdtdec_get_config_int(const void *blob, const char *prop_name,
+ int default_val);
+
+/**
+ * Look in the FDT for a config item with the given name
+ * and return whether it exists.
+ *
+ * @param blob FDT blob
+ * @param prop_name property name to look up
+ * @return 1, if it exists, or 0 if not
+ */
+int fdtdec_get_config_bool(const void *blob, const char *prop_name);
+
+/**
+ * Look in the FDT for a config item with the given name and return its value
+ * as a string.
+ *
+ * @param blob FDT blob
+ * @param prop_name property name to look up
+ * @returns property string, NULL on error.
+ */
+char *fdtdec_get_config_string(const void *blob, const char *prop_name);
+
/*
* Look up a property in a node and return its contents in a byte
* array of given length. The property must have at least enough data for
*/
const u8 *fdtdec_locate_byte_array(const void *blob, int node,
const char *prop_name, int count);
+
+/**
+ * Look up a property in a node which contains a memory region address and
+ * size. Then return a pointer to this address.
+ *
+ * The property must hold one address with a length. This is only tested on
+ * 32-bit machines.
+ *
+ * @param blob FDT blob
+ * @param node node to examine
+ * @param prop_name name of property to find
+ * @param ptrp returns pointer to region, or NULL if no address
+ * @param size returns size of region
+ * @return 0 if ok, -1 on error (propery not found)
+ */
+int fdtdec_decode_region(const void *blob, int node,
+ const char *prop_name, void **ptrp, size_t *size);
+#endif
projects / karo-tx-uboot.git / blobdiff