#include <fdtdec.h>
#include <linux/ctype.h>
-#include <asm/gpio.h>
-
DECLARE_GLOBAL_DATA_PTR;
/*
COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"),
COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"),
COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"),
- COMPAT(NVIDIA_TEGRA114_I2C, "nvidia,tegra114-i2c"),
- COMPAT(NVIDIA_TEGRA20_I2C, "nvidia,tegra20-i2c"),
- COMPAT(NVIDIA_TEGRA20_DVC, "nvidia,tegra20-i2c-dvc"),
COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"),
COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"),
COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"),
COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"),
- COMPAT(NVIDIA_TEGRA20_SFLASH, "nvidia,tegra20-sflash"),
- COMPAT(NVIDIA_TEGRA20_SLINK, "nvidia,tegra20-slink"),
- COMPAT(NVIDIA_TEGRA114_SPI, "nvidia,tegra114-spi"),
COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"),
COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"),
COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"),
COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
- COMPAT(SAMSUNG_EXYNOS_SPI, "samsung,exynos-spi"),
COMPAT(GOOGLE_CROS_EC, "google,cros-ec"),
COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"),
COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"),
COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"),
COMPAT(INTEL_GMA, "intel,gma"),
COMPAT(AMS_AS3722, "ams,as3722"),
+ COMPAT(INTEL_ICH_SPI, "intel,ich-spi"),
+ COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
+ COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
};
const char *fdtdec_get_compatible(enum fdt_compat_id id)
return fdtdec_get_addr_size(blob, node, prop_name, NULL);
}
+#ifdef CONFIG_PCI
+int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,
+ const char *prop_name, struct fdt_pci_addr *addr)
+{
+ const u32 *cell;
+ int len;
+ int ret = -ENOENT;
+
+ debug("%s: %s: ", __func__, prop_name);
+
+ /*
+ * If we follow the pci bus bindings strictly, we should check
+ * the value of the node's parent node's #address-cells and
+ * #size-cells. They need to be 3 and 2 accordingly. However,
+ * for simplicity we skip the check here.
+ */
+ cell = fdt_getprop(blob, node, prop_name, &len);
+ if (!cell)
+ goto fail;
+
+ if ((len % FDT_PCI_REG_SIZE) == 0) {
+ int num = len / FDT_PCI_REG_SIZE;
+ int i;
+
+ for (i = 0; i < num; i++) {
+ debug("pci address #%d: %08lx %08lx %08lx\n", i,
+ (ulong)fdt_addr_to_cpu(cell[0]),
+ (ulong)fdt_addr_to_cpu(cell[1]),
+ (ulong)fdt_addr_to_cpu(cell[2]));
+ if ((fdt_addr_to_cpu(*cell) & type) == type) {
+ addr->phys_hi = fdt_addr_to_cpu(cell[0]);
+ addr->phys_mid = fdt_addr_to_cpu(cell[1]);
+ addr->phys_lo = fdt_addr_to_cpu(cell[2]);
+ break;
+ } else {
+ cell += (FDT_PCI_ADDR_CELLS +
+ FDT_PCI_SIZE_CELLS);
+ }
+ }
+
+ if (i == num)
+ goto fail;
+
+ return 0;
+ } else {
+ ret = -EINVAL;
+ }
+
+fail:
+ debug("(not found)\n");
+ return ret;
+}
+
+int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
+{
+ const char *list, *end;
+ int len;
+
+ list = fdt_getprop(blob, node, "compatible", &len);
+ if (!list)
+ return -ENOENT;
+
+ end = list + len;
+ while (list < end) {
+ char *s;
+
+ len = strlen(list);
+ if (len >= strlen("pciVVVV,DDDD")) {
+ s = strstr(list, "pci");
+
+ /*
+ * check if the string is something like pciVVVV,DDDD.RR
+ * or just pciVVVV,DDDD
+ */
+ if (s && s[7] == ',' &&
+ (s[12] == '.' || s[12] == 0)) {
+ s += 3;
+ *vendor = simple_strtol(s, NULL, 16);
+
+ s += 5;
+ *device = simple_strtol(s, NULL, 16);
+
+ return 0;
+ }
+ } else {
+ list += (len + 1);
+ }
+ }
+
+ return -ENOENT;
+}
+
+int fdtdec_get_pci_bdf(const void *blob, int node,
+ struct fdt_pci_addr *addr, pci_dev_t *bdf)
+{
+ u16 dt_vendor, dt_device, vendor, device;
+ int ret;
+
+ /* get vendor id & device id from the compatible string */
+ ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device);
+ if (ret)
+ return ret;
+
+ /* extract the bdf from fdt_pci_addr */
+ *bdf = addr->phys_hi & 0xffff00;
+
+ /* read vendor id & device id based on bdf */
+ pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor);
+ pci_read_config_word(*bdf, PCI_DEVICE_ID, &device);
+
+ /*
+ * Note there are two places in the device tree to fully describe
+ * a pci device: one is via compatible string with a format of
+ * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in
+ * the device node's reg address property. We read the vendor id
+ * and device id based on bdf and compare the values with the
+ * "VVVV,DDDD". If they are the same, then we are good to use bdf
+ * to read device's bar. But if they are different, we have to rely
+ * on the vendor id and device id extracted from the compatible
+ * string and locate the real bdf by pci_find_device(). This is
+ * because normally we may only know device's device number and
+ * function number when writing device tree. The bus number is
+ * dynamically assigned during the pci enumeration process.
+ */
+ if ((dt_vendor != vendor) || (dt_device != device)) {
+ *bdf = pci_find_device(dt_vendor, dt_device, 0);
+ if (*bdf == -1)
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+int fdtdec_get_pci_bar32(const void *blob, int node,
+ struct fdt_pci_addr *addr, u32 *bar)
+{
+ pci_dev_t bdf;
+ int barnum;
+ int ret;
+
+ /* get pci devices's bdf */
+ ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf);
+ if (ret)
+ return ret;
+
+ /* extract the bar number from fdt_pci_addr */
+ barnum = addr->phys_hi & 0xff;
+ if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS))
+ return -EINVAL;
+
+ barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;
+ *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum);
+
+ return 0;
+}
+#endif
+
uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
uint64_t default_val)
{
return cell != NULL;
}
-/**
- * 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)
+int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
+ const char *list_name,
+ const char *cells_name,
+ int cell_count, int index,
+ struct fdtdec_phandle_args *out_args)
{
- const struct fdt_property *prop;
- const u32 *cell;
- const char *name;
- int len, i;
-
- debug("%s: %s\n", __func__, prop_name);
- assert(max_count > 0);
- prop = fdt_get_property(blob, node, prop_name, &len);
- if (!prop) {
- debug("%s: property '%s' missing\n", __func__, prop_name);
- return -FDT_ERR_NOTFOUND;
- }
-
- /* We will use the name to tag the GPIO */
- name = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
- cell = (u32 *)prop->data;
- len /= sizeof(u32) * 3; /* 3 cells per GPIO record */
- if (len > max_count) {
- debug(" %s: too many GPIOs / cells for "
- "property '%s'\n", __func__, prop_name);
- return -FDT_ERR_BADLAYOUT;
- }
-
- /* Read out the GPIO data from the cells */
- for (i = 0; i < len; i++, cell += 3) {
- gpio[i].gpio = fdt32_to_cpu(cell[1]);
- gpio[i].flags = fdt32_to_cpu(cell[2]);
- gpio[i].name = name;
- }
-
- return len;
-}
+ const __be32 *list, *list_end;
+ int rc = 0, size, cur_index = 0;
+ uint32_t count = 0;
+ int node = -1;
+ int phandle;
+
+ /* Retrieve the phandle list property */
+ list = fdt_getprop(blob, src_node, list_name, &size);
+ if (!list)
+ return -ENOENT;
+ list_end = list + size / sizeof(*list);
-int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
- struct fdt_gpio_state *gpio)
-{
- int err;
+ /* Loop over the phandles until all the requested entry is found */
+ while (list < list_end) {
+ rc = -EINVAL;
+ count = 0;
- debug("%s: %s\n", __func__, prop_name);
- gpio->gpio = FDT_GPIO_NONE;
- gpio->name = NULL;
- err = fdtdec_decode_gpios(blob, node, prop_name, gpio, 1);
- return err == 1 ? 0 : err;
-}
+ /*
+ * If phandle is 0, then it is an empty entry with no
+ * arguments. Skip forward to the next entry.
+ */
+ phandle = be32_to_cpup(list++);
+ if (phandle) {
+ /*
+ * Find the provider node and parse the #*-cells
+ * property to determine the argument length.
+ *
+ * This is not needed if the cell count is hard-coded
+ * (i.e. cells_name not set, but cell_count is set),
+ * except when we're going to return the found node
+ * below.
+ */
+ if (cells_name || cur_index == index) {
+ node = fdt_node_offset_by_phandle(blob,
+ phandle);
+ if (!node) {
+ debug("%s: could not find phandle\n",
+ fdt_get_name(blob, src_node,
+ NULL));
+ goto err;
+ }
+ }
-int fdtdec_get_gpio(struct fdt_gpio_state *gpio)
-{
- int val;
+ if (cells_name) {
+ count = fdtdec_get_int(blob, node, cells_name,
+ -1);
+ if (count == -1) {
+ debug("%s: could not get %s for %s\n",
+ fdt_get_name(blob, src_node,
+ NULL),
+ cells_name,
+ fdt_get_name(blob, node,
+ NULL));
+ goto err;
+ }
+ } else {
+ count = cell_count;
+ }
- if (!fdt_gpio_isvalid(gpio))
- return -1;
+ /*
+ * Make sure that the arguments actually fit in the
+ * remaining property data length
+ */
+ if (list + count > list_end) {
+ debug("%s: arguments longer than property\n",
+ fdt_get_name(blob, src_node, NULL));
+ goto err;
+ }
+ }
- val = gpio_get_value(gpio->gpio);
- return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
-}
+ /*
+ * All of the error cases above bail out of the loop, so at
+ * this point, the parsing is successful. If the requested
+ * index matches, then fill the out_args structure and return,
+ * or return -ENOENT for an empty entry.
+ */
+ rc = -ENOENT;
+ if (cur_index == index) {
+ if (!phandle)
+ goto err;
+
+ if (out_args) {
+ int i;
+
+ if (count > MAX_PHANDLE_ARGS) {
+ debug("%s: too many arguments %d\n",
+ fdt_get_name(blob, src_node,
+ NULL), count);
+ count = MAX_PHANDLE_ARGS;
+ }
+ out_args->node = node;
+ out_args->args_count = count;
+ for (i = 0; i < count; i++) {
+ out_args->args[i] =
+ be32_to_cpup(list++);
+ }
+ }
-int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val)
-{
- if (!fdt_gpio_isvalid(gpio))
- return -1;
+ /* Found it! return success */
+ return 0;
+ }
- val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
- return gpio_set_value(gpio->gpio, val);
-}
+ node = -1;
+ list += count;
+ cur_index++;
+ }
-int fdtdec_setup_gpio(struct fdt_gpio_state *gpio)
-{
/*
- * Return success if there is no GPIO defined. This is used for
- * optional GPIOs)
+ * Result will be one of:
+ * -ENOENT : index is for empty phandle
+ * -EINVAL : parsing error on data
+ * [1..n] : Number of phandle (count mode; when index = -1)
*/
- if (!fdt_gpio_isvalid(gpio))
- return 0;
-
- if (gpio_request(gpio->gpio, gpio->name))
- return -1;
- return 0;
+ rc = index < 0 ? cur_index : -ENOENT;
+ err:
+ return rc;
}
int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
return fdt_get_resource(fdt, node, property, index, res);
}
-int fdtdec_pci_get_bdf(const void *fdt, int node, int *bdf)
-{
- const fdt32_t *prop;
- int len;
-
- prop = fdt_getprop(fdt, node, "reg", &len);
- if (!prop)
- return len;
-
- *bdf = fdt32_to_cpu(*prop) & 0xffffff;
-
- return 0;
-}
-
int fdtdec_decode_memory_region(const void *blob, int config_node,
const char *mem_type, const char *suffix,
fdt_addr_t *basep, fdt_size_t *sizep)
projects / karo-tx-uboot.git / blobdiff