Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2011 The Chromium OS Authors. |
Wolfgang Denk | 1a45966 | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 3 | * SPDX-License-Identifier: GPL-2.0+ |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 4 | */ |
| 5 | |
Heiko Schocher | 29a23f9 | 2014-03-03 12:19:30 +0100 | [diff] [blame] | 6 | #ifndef USE_HOSTCC |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 7 | #include <common.h> |
Simon Glass | 5c33c9f | 2014-07-23 06:55:09 -0600 | [diff] [blame] | 8 | #include <errno.h> |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 9 | #include <serial.h> |
| 10 | #include <libfdt.h> |
| 11 | #include <fdtdec.h> |
Simon Glass | 5c33c9f | 2014-07-23 06:55:09 -0600 | [diff] [blame] | 12 | #include <linux/ctype.h> |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 13 | |
| 14 | DECLARE_GLOBAL_DATA_PTR; |
| 15 | |
| 16 | /* |
| 17 | * Here are the type we know about. One day we might allow drivers to |
| 18 | * register. For now we just put them here. The COMPAT macro allows us to |
| 19 | * turn this into a sparse list later, and keeps the ID with the name. |
| 20 | */ |
| 21 | #define COMPAT(id, name) name |
| 22 | static const char * const compat_names[COMPAT_COUNT] = { |
Simon Glass | f88fe2d | 2012-02-27 10:52:34 +0000 | [diff] [blame] | 23 | COMPAT(UNKNOWN, "<none>"), |
Simon Glass | 87f938c | 2012-02-27 10:52:49 +0000 | [diff] [blame] | 24 | COMPAT(NVIDIA_TEGRA20_USB, "nvidia,tegra20-ehci"), |
Jim Lin | 7e44d93 | 2013-06-21 19:05:47 +0800 | [diff] [blame] | 25 | COMPAT(NVIDIA_TEGRA30_USB, "nvidia,tegra30-ehci"), |
| 26 | COMPAT(NVIDIA_TEGRA114_USB, "nvidia,tegra114-ehci"), |
Jimmy Zhang | 0e35ad0 | 2012-04-02 13:18:52 +0000 | [diff] [blame] | 27 | COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"), |
| 28 | COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"), |
Rakesh Iyer | 6642a68 | 2012-04-17 09:01:35 +0000 | [diff] [blame] | 29 | COMPAT(NVIDIA_TEGRA20_KBC, "nvidia,tegra20-kbc"), |
Jim Lin | 312693c | 2012-07-29 20:53:29 +0000 | [diff] [blame] | 30 | COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"), |
Simon Glass | e1ae0d1 | 2012-10-17 13:24:49 +0000 | [diff] [blame] | 31 | COMPAT(NVIDIA_TEGRA20_PWM, "nvidia,tegra20-pwm"), |
Wei Ni | 87540de | 2012-10-17 13:24:50 +0000 | [diff] [blame] | 32 | COMPAT(NVIDIA_TEGRA20_DC, "nvidia,tegra20-dc"), |
Stephen Warren | a73ca47 | 2014-01-24 12:46:06 -0700 | [diff] [blame] | 33 | COMPAT(NVIDIA_TEGRA124_SDMMC, "nvidia,tegra124-sdhci"), |
Tom Warren | f4e4e0b | 2013-03-04 14:07:18 -0700 | [diff] [blame] | 34 | COMPAT(NVIDIA_TEGRA30_SDMMC, "nvidia,tegra30-sdhci"), |
Tom Warren | c9aa831 | 2013-02-21 12:31:30 +0000 | [diff] [blame] | 35 | COMPAT(NVIDIA_TEGRA20_SDMMC, "nvidia,tegra20-sdhci"), |
Thierry Reding | f315828 | 2014-12-09 22:25:12 -0700 | [diff] [blame] | 36 | COMPAT(NVIDIA_TEGRA124_PCIE, "nvidia,tegra124-pcie"), |
| 37 | COMPAT(NVIDIA_TEGRA30_PCIE, "nvidia,tegra30-pcie"), |
| 38 | COMPAT(NVIDIA_TEGRA20_PCIE, "nvidia,tegra20-pcie"), |
Thierry Reding | 79c7a90 | 2014-12-09 22:25:09 -0700 | [diff] [blame] | 39 | COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"), |
Hatim RV | cc9fe33 | 2012-12-11 00:52:46 +0000 | [diff] [blame] | 40 | COMPAT(SMSC_LAN9215, "smsc,lan9215"), |
| 41 | COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"), |
Rajeshwari Shinde | c34253d | 2012-12-26 20:03:10 +0000 | [diff] [blame] | 42 | COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"), |
Rajeshwari Shinde | 72dbff1 | 2012-12-26 20:03:16 +0000 | [diff] [blame] | 43 | COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"), |
| 44 | COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"), |
Hung-ying Tyan | 8836438 | 2013-05-15 18:27:28 +0800 | [diff] [blame] | 45 | COMPAT(GOOGLE_CROS_EC, "google,cros-ec"), |
Hung-ying Tyan | 713cb68 | 2013-05-15 18:27:32 +0800 | [diff] [blame] | 46 | COMPAT(GOOGLE_CROS_EC_KEYB, "google,cros-ec-keyb"), |
Rajeshwari Shinde | 6abd162 | 2013-01-07 23:35:05 +0000 | [diff] [blame] | 47 | COMPAT(SAMSUNG_EXYNOS_EHCI, "samsung,exynos-ehci"), |
Vivek Gautam | 108b85b | 2013-09-14 14:02:48 +0530 | [diff] [blame] | 48 | COMPAT(SAMSUNG_EXYNOS5_XHCI, "samsung,exynos5250-xhci"), |
Rajeshwari Shinde | 6abd162 | 2013-01-07 23:35:05 +0000 | [diff] [blame] | 49 | COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"), |
Vivek Gautam | 108b85b | 2013-09-14 14:02:48 +0530 | [diff] [blame] | 50 | COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"), |
Akshay Saraswat | 618766c | 2013-02-25 01:13:01 +0000 | [diff] [blame] | 51 | COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"), |
Ajay Kumar | d7377b5 | 2013-02-21 23:53:00 +0000 | [diff] [blame] | 52 | COMPAT(SAMSUNG_EXYNOS_FIMD, "samsung,exynos-fimd"), |
Piotr Wilczek | de461c5 | 2014-03-07 14:59:39 +0100 | [diff] [blame] | 53 | COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"), |
Ajay Kumar | 1e4706a | 2013-02-21 23:53:05 +0000 | [diff] [blame] | 54 | COMPAT(SAMSUNG_EXYNOS5_DP, "samsung,exynos5-dp"), |
Jaehoon Chung | 7d3ca0f | 2014-05-16 13:59:51 +0900 | [diff] [blame] | 55 | COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"), |
Piotr Wilczek | 3577fe8 | 2014-03-07 14:59:41 +0100 | [diff] [blame] | 56 | COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"), |
Rajeshwari Shinde | ee1e3c2 | 2013-06-24 16:47:20 +0530 | [diff] [blame] | 57 | COMPAT(SAMSUNG_EXYNOS_SERIAL, "samsung,exynos4210-uart"), |
Rajeshwari Shinde | cd577e2 | 2013-01-08 21:03:38 +0000 | [diff] [blame] | 58 | COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"), |
Simon Glass | bb8215f | 2013-03-11 06:08:08 +0000 | [diff] [blame] | 59 | COMPAT(GENERIC_SPI_FLASH, "spi-flash"), |
Rajeshwari Shinde | 7772bb7 | 2013-02-14 19:46:15 +0000 | [diff] [blame] | 60 | COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"), |
Rong Chang | f626799 | 2013-04-12 10:44:57 +0000 | [diff] [blame] | 61 | COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"), |
Vincent Palatin | ec34fa5 | 2013-04-12 11:04:36 +0000 | [diff] [blame] | 62 | COMPAT(INFINEON_SLB9645_TPM, "infineon,slb9645-tpm"), |
naveen krishna chatradhi | ecbd7e1 | 2013-04-29 15:58:52 -0700 | [diff] [blame] | 63 | COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"), |
Simon Glass | df93d90 | 2014-02-27 13:26:12 -0700 | [diff] [blame] | 64 | COMPAT(SANDBOX_HOST_EMULATION, "sandbox,host-emulation"), |
Simon Glass | 7d95f2a | 2014-02-27 13:26:19 -0700 | [diff] [blame] | 65 | COMPAT(SANDBOX_LCD_SDL, "sandbox,lcd-sdl"), |
Tom Wai-Hong Tam | ac1058f | 2014-05-20 06:01:36 -0600 | [diff] [blame] | 66 | COMPAT(TI_TPS65090, "ti,tps65090"), |
Simon Glass | a9cf6da | 2014-05-20 06:01:42 -0600 | [diff] [blame] | 67 | COMPAT(COMPAT_NXP_PTN3460, "nxp,ptn3460"), |
Ajay Kumar | 45c480c | 2014-09-05 16:53:33 +0530 | [diff] [blame] | 68 | COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"), |
Vadim Bendebury | 9e8f664 | 2014-09-05 16:53:34 +0530 | [diff] [blame] | 69 | COMPAT(PARADE_PS8625, "parade,ps8625"), |
Simon Glass | ca42d3f | 2014-10-10 07:30:14 -0600 | [diff] [blame] | 70 | COMPAT(COMPAT_INTEL_LPC, "intel,lpc"), |
Simon Glass | 77f9b1f | 2014-11-12 22:42:21 -0700 | [diff] [blame] | 71 | COMPAT(INTEL_MICROCODE, "intel,microcode"), |
Simon Glass | 65dd74a | 2014-11-12 22:42:28 -0700 | [diff] [blame] | 72 | COMPAT(MEMORY_SPD, "memory-spd"), |
Simon Glass | 3ac8393 | 2014-11-14 18:18:38 -0700 | [diff] [blame] | 73 | COMPAT(INTEL_PANTHERPOINT_AHCI, "intel,pantherpoint-ahci"), |
Simon Glass | bb80be3 | 2014-11-24 21:18:16 -0700 | [diff] [blame] | 74 | COMPAT(INTEL_MODEL_206AX, "intel,model-206ax"), |
Simon Glass | effcf06 | 2014-11-14 20:56:36 -0700 | [diff] [blame] | 75 | COMPAT(INTEL_GMA, "intel,gma"), |
Thierry Reding | 6173c45 | 2014-12-09 22:25:05 -0700 | [diff] [blame] | 76 | COMPAT(AMS_AS3722, "ams,as3722"), |
Simon Glass | 5da3808 | 2015-01-19 22:16:06 -0700 | [diff] [blame] | 77 | COMPAT(INTEL_ICH_SPI, "intel,ich-spi"), |
Bin Meng | c89ada0 | 2015-02-05 23:42:26 +0800 | [diff] [blame^] | 78 | COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"), |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 79 | }; |
| 80 | |
Simon Glass | a53f4a2 | 2012-01-17 08:20:50 +0000 | [diff] [blame] | 81 | const char *fdtdec_get_compatible(enum fdt_compat_id id) |
| 82 | { |
| 83 | /* We allow reading of the 'unknown' ID for testing purposes */ |
| 84 | assert(id >= 0 && id < COMPAT_COUNT); |
| 85 | return compat_names[id]; |
| 86 | } |
| 87 | |
Simon Glass | 4397a2a | 2013-03-19 04:58:51 +0000 | [diff] [blame] | 88 | fdt_addr_t fdtdec_get_addr_size(const void *blob, int node, |
| 89 | const char *prop_name, fdt_size_t *sizep) |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 90 | { |
| 91 | const fdt_addr_t *cell; |
| 92 | int len; |
| 93 | |
Simon Glass | 1cb2323 | 2012-07-12 05:25:01 +0000 | [diff] [blame] | 94 | debug("%s: %s: ", __func__, prop_name); |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 95 | cell = fdt_getprop(blob, node, prop_name, &len); |
Simon Glass | 4397a2a | 2013-03-19 04:58:51 +0000 | [diff] [blame] | 96 | if (cell && ((!sizep && len == sizeof(fdt_addr_t)) || |
| 97 | len == sizeof(fdt_addr_t) * 2)) { |
Simon Glass | 1cb2323 | 2012-07-12 05:25:01 +0000 | [diff] [blame] | 98 | fdt_addr_t addr = fdt_addr_to_cpu(*cell); |
Simon Glass | 4397a2a | 2013-03-19 04:58:51 +0000 | [diff] [blame] | 99 | if (sizep) { |
| 100 | const fdt_size_t *size; |
Simon Glass | 1cb2323 | 2012-07-12 05:25:01 +0000 | [diff] [blame] | 101 | |
Simon Glass | 4397a2a | 2013-03-19 04:58:51 +0000 | [diff] [blame] | 102 | size = (fdt_size_t *)((char *)cell + |
| 103 | sizeof(fdt_addr_t)); |
| 104 | *sizep = fdt_size_to_cpu(*size); |
Simon Glass | 370b6c5 | 2013-11-10 10:26:54 -0700 | [diff] [blame] | 105 | debug("addr=%08lx, size=%08x\n", |
| 106 | (ulong)addr, *sizep); |
Simon Glass | 4397a2a | 2013-03-19 04:58:51 +0000 | [diff] [blame] | 107 | } else { |
Simon Glass | 370b6c5 | 2013-11-10 10:26:54 -0700 | [diff] [blame] | 108 | debug("%08lx\n", (ulong)addr); |
Simon Glass | 4397a2a | 2013-03-19 04:58:51 +0000 | [diff] [blame] | 109 | } |
Simon Glass | 1cb2323 | 2012-07-12 05:25:01 +0000 | [diff] [blame] | 110 | return addr; |
| 111 | } |
| 112 | debug("(not found)\n"); |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 113 | return FDT_ADDR_T_NONE; |
| 114 | } |
| 115 | |
Simon Glass | 4397a2a | 2013-03-19 04:58:51 +0000 | [diff] [blame] | 116 | fdt_addr_t fdtdec_get_addr(const void *blob, int node, |
| 117 | const char *prop_name) |
| 118 | { |
| 119 | return fdtdec_get_addr_size(blob, node, prop_name, NULL); |
| 120 | } |
| 121 | |
Bin Meng | a62e84d | 2014-12-31 16:05:11 +0800 | [diff] [blame] | 122 | #ifdef CONFIG_PCI |
| 123 | int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type, |
| 124 | const char *prop_name, struct fdt_pci_addr *addr) |
| 125 | { |
| 126 | const u32 *cell; |
| 127 | int len; |
| 128 | int ret = -ENOENT; |
| 129 | |
| 130 | debug("%s: %s: ", __func__, prop_name); |
| 131 | |
| 132 | /* |
| 133 | * If we follow the pci bus bindings strictly, we should check |
| 134 | * the value of the node's parent node's #address-cells and |
| 135 | * #size-cells. They need to be 3 and 2 accordingly. However, |
| 136 | * for simplicity we skip the check here. |
| 137 | */ |
| 138 | cell = fdt_getprop(blob, node, prop_name, &len); |
| 139 | if (!cell) |
| 140 | goto fail; |
| 141 | |
| 142 | if ((len % FDT_PCI_REG_SIZE) == 0) { |
| 143 | int num = len / FDT_PCI_REG_SIZE; |
| 144 | int i; |
| 145 | |
| 146 | for (i = 0; i < num; i++) { |
| 147 | debug("pci address #%d: %08lx %08lx %08lx\n", i, |
| 148 | (ulong)fdt_addr_to_cpu(cell[0]), |
| 149 | (ulong)fdt_addr_to_cpu(cell[1]), |
| 150 | (ulong)fdt_addr_to_cpu(cell[2])); |
| 151 | if ((fdt_addr_to_cpu(*cell) & type) == type) { |
| 152 | addr->phys_hi = fdt_addr_to_cpu(cell[0]); |
| 153 | addr->phys_mid = fdt_addr_to_cpu(cell[1]); |
| 154 | addr->phys_lo = fdt_addr_to_cpu(cell[2]); |
| 155 | break; |
| 156 | } else { |
| 157 | cell += (FDT_PCI_ADDR_CELLS + |
| 158 | FDT_PCI_SIZE_CELLS); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | if (i == num) |
| 163 | goto fail; |
| 164 | |
| 165 | return 0; |
| 166 | } else { |
| 167 | ret = -EINVAL; |
| 168 | } |
| 169 | |
| 170 | fail: |
| 171 | debug("(not found)\n"); |
| 172 | return ret; |
| 173 | } |
| 174 | |
| 175 | int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device) |
| 176 | { |
| 177 | const char *list, *end; |
| 178 | int len; |
| 179 | |
| 180 | list = fdt_getprop(blob, node, "compatible", &len); |
| 181 | if (!list) |
| 182 | return -ENOENT; |
| 183 | |
| 184 | end = list + len; |
| 185 | while (list < end) { |
| 186 | char *s; |
| 187 | |
| 188 | len = strlen(list); |
| 189 | if (len >= strlen("pciVVVV,DDDD")) { |
| 190 | s = strstr(list, "pci"); |
| 191 | |
| 192 | /* |
| 193 | * check if the string is something like pciVVVV,DDDD.RR |
| 194 | * or just pciVVVV,DDDD |
| 195 | */ |
| 196 | if (s && s[7] == ',' && |
| 197 | (s[12] == '.' || s[12] == 0)) { |
| 198 | s += 3; |
| 199 | *vendor = simple_strtol(s, NULL, 16); |
| 200 | |
| 201 | s += 5; |
| 202 | *device = simple_strtol(s, NULL, 16); |
| 203 | |
| 204 | return 0; |
| 205 | } |
| 206 | } else { |
| 207 | list += (len + 1); |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | return -ENOENT; |
| 212 | } |
| 213 | |
| 214 | int fdtdec_get_pci_bdf(const void *blob, int node, |
| 215 | struct fdt_pci_addr *addr, pci_dev_t *bdf) |
| 216 | { |
| 217 | u16 dt_vendor, dt_device, vendor, device; |
| 218 | int ret; |
| 219 | |
| 220 | /* get vendor id & device id from the compatible string */ |
| 221 | ret = fdtdec_get_pci_vendev(blob, node, &dt_vendor, &dt_device); |
| 222 | if (ret) |
| 223 | return ret; |
| 224 | |
| 225 | /* extract the bdf from fdt_pci_addr */ |
| 226 | *bdf = addr->phys_hi & 0xffff00; |
| 227 | |
| 228 | /* read vendor id & device id based on bdf */ |
| 229 | pci_read_config_word(*bdf, PCI_VENDOR_ID, &vendor); |
| 230 | pci_read_config_word(*bdf, PCI_DEVICE_ID, &device); |
| 231 | |
| 232 | /* |
| 233 | * Note there are two places in the device tree to fully describe |
| 234 | * a pci device: one is via compatible string with a format of |
| 235 | * "pciVVVV,DDDD" and the other one is the bdf numbers encoded in |
| 236 | * the device node's reg address property. We read the vendor id |
| 237 | * and device id based on bdf and compare the values with the |
| 238 | * "VVVV,DDDD". If they are the same, then we are good to use bdf |
| 239 | * to read device's bar. But if they are different, we have to rely |
| 240 | * on the vendor id and device id extracted from the compatible |
| 241 | * string and locate the real bdf by pci_find_device(). This is |
| 242 | * because normally we may only know device's device number and |
| 243 | * function number when writing device tree. The bus number is |
| 244 | * dynamically assigned during the pci enumeration process. |
| 245 | */ |
| 246 | if ((dt_vendor != vendor) || (dt_device != device)) { |
| 247 | *bdf = pci_find_device(dt_vendor, dt_device, 0); |
| 248 | if (*bdf == -1) |
| 249 | return -ENODEV; |
| 250 | } |
| 251 | |
| 252 | return 0; |
| 253 | } |
| 254 | |
| 255 | int fdtdec_get_pci_bar32(const void *blob, int node, |
| 256 | struct fdt_pci_addr *addr, u32 *bar) |
| 257 | { |
| 258 | pci_dev_t bdf; |
| 259 | int barnum; |
| 260 | int ret; |
| 261 | |
| 262 | /* get pci devices's bdf */ |
| 263 | ret = fdtdec_get_pci_bdf(blob, node, addr, &bdf); |
| 264 | if (ret) |
| 265 | return ret; |
| 266 | |
| 267 | /* extract the bar number from fdt_pci_addr */ |
| 268 | barnum = addr->phys_hi & 0xff; |
| 269 | if ((barnum < PCI_BASE_ADDRESS_0) || (barnum > PCI_CARDBUS_CIS)) |
| 270 | return -EINVAL; |
| 271 | |
| 272 | barnum = (barnum - PCI_BASE_ADDRESS_0) / 4; |
| 273 | *bar = pci_read_bar32(pci_bus_to_hose(PCI_BUS(bdf)), bdf, barnum); |
| 274 | |
| 275 | return 0; |
| 276 | } |
| 277 | #endif |
| 278 | |
Che-Liang Chiou | aadef0a | 2012-10-25 16:31:05 +0000 | [diff] [blame] | 279 | uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, |
| 280 | uint64_t default_val) |
| 281 | { |
| 282 | const uint64_t *cell64; |
| 283 | int length; |
| 284 | |
| 285 | cell64 = fdt_getprop(blob, node, prop_name, &length); |
| 286 | if (!cell64 || length < sizeof(*cell64)) |
| 287 | return default_val; |
| 288 | |
| 289 | return fdt64_to_cpu(*cell64); |
| 290 | } |
| 291 | |
Simon Glass | f88fe2d | 2012-02-27 10:52:34 +0000 | [diff] [blame] | 292 | int fdtdec_get_is_enabled(const void *blob, int node) |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 293 | { |
| 294 | const char *cell; |
| 295 | |
Simon Glass | f88fe2d | 2012-02-27 10:52:34 +0000 | [diff] [blame] | 296 | /* |
| 297 | * It should say "okay", so only allow that. Some fdts use "ok" but |
| 298 | * this is a bug. Please fix your device tree source file. See here |
| 299 | * for discussion: |
| 300 | * |
| 301 | * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html |
| 302 | */ |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 303 | cell = fdt_getprop(blob, node, "status", NULL); |
| 304 | if (cell) |
Simon Glass | f88fe2d | 2012-02-27 10:52:34 +0000 | [diff] [blame] | 305 | return 0 == strcmp(cell, "okay"); |
| 306 | return 1; |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 307 | } |
| 308 | |
Gerald Van Baren | 7cde397 | 2012-11-12 23:13:54 -0500 | [diff] [blame] | 309 | enum fdt_compat_id fdtdec_lookup(const void *blob, int node) |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 310 | { |
| 311 | enum fdt_compat_id id; |
| 312 | |
| 313 | /* Search our drivers */ |
| 314 | for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++) |
| 315 | if (0 == fdt_node_check_compatible(blob, node, |
| 316 | compat_names[id])) |
| 317 | return id; |
| 318 | return COMPAT_UNKNOWN; |
| 319 | } |
| 320 | |
| 321 | int fdtdec_next_compatible(const void *blob, int node, |
| 322 | enum fdt_compat_id id) |
| 323 | { |
| 324 | return fdt_node_offset_by_compatible(blob, node, compat_names[id]); |
| 325 | } |
| 326 | |
Simon Glass | 3ddecfc | 2012-04-02 13:18:42 +0000 | [diff] [blame] | 327 | int fdtdec_next_compatible_subnode(const void *blob, int node, |
| 328 | enum fdt_compat_id id, int *depthp) |
| 329 | { |
| 330 | do { |
| 331 | node = fdt_next_node(blob, node, depthp); |
| 332 | } while (*depthp > 1); |
| 333 | |
| 334 | /* If this is a direct subnode, and compatible, return it */ |
| 335 | if (*depthp == 1 && 0 == fdt_node_check_compatible( |
| 336 | blob, node, compat_names[id])) |
| 337 | return node; |
| 338 | |
| 339 | return -FDT_ERR_NOTFOUND; |
| 340 | } |
| 341 | |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 342 | int fdtdec_next_alias(const void *blob, const char *name, |
| 343 | enum fdt_compat_id id, int *upto) |
| 344 | { |
| 345 | #define MAX_STR_LEN 20 |
| 346 | char str[MAX_STR_LEN + 20]; |
| 347 | int node, err; |
| 348 | |
| 349 | /* snprintf() is not available */ |
| 350 | assert(strlen(name) < MAX_STR_LEN); |
| 351 | sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto); |
Simon Glass | 0087847 | 2012-10-31 14:02:42 +0000 | [diff] [blame] | 352 | node = fdt_path_offset(blob, str); |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 353 | if (node < 0) |
| 354 | return node; |
| 355 | err = fdt_node_check_compatible(blob, node, compat_names[id]); |
| 356 | if (err < 0) |
| 357 | return err; |
Simon Glass | f88fe2d | 2012-02-27 10:52:34 +0000 | [diff] [blame] | 358 | if (err) |
| 359 | return -FDT_ERR_NOTFOUND; |
| 360 | (*upto)++; |
| 361 | return node; |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 362 | } |
| 363 | |
Simon Glass | a53f4a2 | 2012-01-17 08:20:50 +0000 | [diff] [blame] | 364 | int fdtdec_find_aliases_for_id(const void *blob, const char *name, |
| 365 | enum fdt_compat_id id, int *node_list, int maxcount) |
| 366 | { |
Simon Glass | c678227 | 2012-02-03 15:13:53 +0000 | [diff] [blame] | 367 | memset(node_list, '\0', sizeof(*node_list) * maxcount); |
| 368 | |
| 369 | return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount); |
| 370 | } |
| 371 | |
| 372 | /* TODO: Can we tighten this code up a little? */ |
| 373 | int fdtdec_add_aliases_for_id(const void *blob, const char *name, |
| 374 | enum fdt_compat_id id, int *node_list, int maxcount) |
| 375 | { |
Simon Glass | a53f4a2 | 2012-01-17 08:20:50 +0000 | [diff] [blame] | 376 | int name_len = strlen(name); |
| 377 | int nodes[maxcount]; |
| 378 | int num_found = 0; |
| 379 | int offset, node; |
| 380 | int alias_node; |
| 381 | int count; |
| 382 | int i, j; |
| 383 | |
| 384 | /* find the alias node if present */ |
| 385 | alias_node = fdt_path_offset(blob, "/aliases"); |
| 386 | |
| 387 | /* |
| 388 | * start with nothing, and we can assume that the root node can't |
| 389 | * match |
| 390 | */ |
| 391 | memset(nodes, '\0', sizeof(nodes)); |
| 392 | |
| 393 | /* First find all the compatible nodes */ |
| 394 | for (node = count = 0; node >= 0 && count < maxcount;) { |
| 395 | node = fdtdec_next_compatible(blob, node, id); |
| 396 | if (node >= 0) |
| 397 | nodes[count++] = node; |
| 398 | } |
| 399 | if (node >= 0) |
| 400 | debug("%s: warning: maxcount exceeded with alias '%s'\n", |
| 401 | __func__, name); |
| 402 | |
| 403 | /* Now find all the aliases */ |
Simon Glass | a53f4a2 | 2012-01-17 08:20:50 +0000 | [diff] [blame] | 404 | for (offset = fdt_first_property_offset(blob, alias_node); |
| 405 | offset > 0; |
| 406 | offset = fdt_next_property_offset(blob, offset)) { |
| 407 | const struct fdt_property *prop; |
| 408 | const char *path; |
| 409 | int number; |
| 410 | int found; |
| 411 | |
| 412 | node = 0; |
| 413 | prop = fdt_get_property_by_offset(blob, offset, NULL); |
| 414 | path = fdt_string(blob, fdt32_to_cpu(prop->nameoff)); |
| 415 | if (prop->len && 0 == strncmp(path, name, name_len)) |
| 416 | node = fdt_path_offset(blob, prop->data); |
| 417 | if (node <= 0) |
| 418 | continue; |
| 419 | |
| 420 | /* Get the alias number */ |
| 421 | number = simple_strtoul(path + name_len, NULL, 10); |
| 422 | if (number < 0 || number >= maxcount) { |
| 423 | debug("%s: warning: alias '%s' is out of range\n", |
| 424 | __func__, path); |
| 425 | continue; |
| 426 | } |
| 427 | |
| 428 | /* Make sure the node we found is actually in our list! */ |
| 429 | found = -1; |
| 430 | for (j = 0; j < count; j++) |
| 431 | if (nodes[j] == node) { |
| 432 | found = j; |
| 433 | break; |
| 434 | } |
| 435 | |
| 436 | if (found == -1) { |
| 437 | debug("%s: warning: alias '%s' points to a node " |
| 438 | "'%s' that is missing or is not compatible " |
| 439 | " with '%s'\n", __func__, path, |
| 440 | fdt_get_name(blob, node, NULL), |
| 441 | compat_names[id]); |
| 442 | continue; |
| 443 | } |
| 444 | |
| 445 | /* |
| 446 | * Add this node to our list in the right place, and mark |
| 447 | * it as done. |
| 448 | */ |
| 449 | if (fdtdec_get_is_enabled(blob, node)) { |
Simon Glass | c678227 | 2012-02-03 15:13:53 +0000 | [diff] [blame] | 450 | if (node_list[number]) { |
| 451 | debug("%s: warning: alias '%s' requires that " |
| 452 | "a node be placed in the list in a " |
| 453 | "position which is already filled by " |
| 454 | "node '%s'\n", __func__, path, |
| 455 | fdt_get_name(blob, node, NULL)); |
| 456 | continue; |
| 457 | } |
Simon Glass | a53f4a2 | 2012-01-17 08:20:50 +0000 | [diff] [blame] | 458 | node_list[number] = node; |
| 459 | if (number >= num_found) |
| 460 | num_found = number + 1; |
| 461 | } |
Simon Glass | c678227 | 2012-02-03 15:13:53 +0000 | [diff] [blame] | 462 | nodes[found] = 0; |
Simon Glass | a53f4a2 | 2012-01-17 08:20:50 +0000 | [diff] [blame] | 463 | } |
| 464 | |
| 465 | /* Add any nodes not mentioned by an alias */ |
| 466 | for (i = j = 0; i < maxcount; i++) { |
| 467 | if (!node_list[i]) { |
| 468 | for (; j < maxcount; j++) |
| 469 | if (nodes[j] && |
| 470 | fdtdec_get_is_enabled(blob, nodes[j])) |
| 471 | break; |
| 472 | |
| 473 | /* Have we run out of nodes to add? */ |
| 474 | if (j == maxcount) |
| 475 | break; |
| 476 | |
| 477 | assert(!node_list[i]); |
| 478 | node_list[i] = nodes[j++]; |
| 479 | if (i >= num_found) |
| 480 | num_found = i + 1; |
| 481 | } |
| 482 | } |
| 483 | |
| 484 | return num_found; |
| 485 | } |
| 486 | |
Simon Glass | 5c33c9f | 2014-07-23 06:55:09 -0600 | [diff] [blame] | 487 | int fdtdec_get_alias_seq(const void *blob, const char *base, int offset, |
| 488 | int *seqp) |
| 489 | { |
| 490 | int base_len = strlen(base); |
| 491 | const char *find_name; |
| 492 | int find_namelen; |
| 493 | int prop_offset; |
| 494 | int aliases; |
| 495 | |
| 496 | find_name = fdt_get_name(blob, offset, &find_namelen); |
| 497 | debug("Looking for '%s' at %d, name %s\n", base, offset, find_name); |
| 498 | |
| 499 | aliases = fdt_path_offset(blob, "/aliases"); |
| 500 | for (prop_offset = fdt_first_property_offset(blob, aliases); |
| 501 | prop_offset > 0; |
| 502 | prop_offset = fdt_next_property_offset(blob, prop_offset)) { |
| 503 | const char *prop; |
| 504 | const char *name; |
| 505 | const char *slash; |
| 506 | const char *p; |
| 507 | int len; |
| 508 | |
| 509 | prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len); |
| 510 | debug(" - %s, %s\n", name, prop); |
| 511 | if (len < find_namelen || *prop != '/' || prop[len - 1] || |
| 512 | strncmp(name, base, base_len)) |
| 513 | continue; |
| 514 | |
| 515 | slash = strrchr(prop, '/'); |
| 516 | if (strcmp(slash + 1, find_name)) |
| 517 | continue; |
Simon Glass | a88340d | 2014-11-11 10:46:20 -0700 | [diff] [blame] | 518 | for (p = name + strlen(name) - 1; p > name; p--) { |
| 519 | if (!isdigit(*p)) { |
| 520 | *seqp = simple_strtoul(p + 1, NULL, 10); |
Simon Glass | 5c33c9f | 2014-07-23 06:55:09 -0600 | [diff] [blame] | 521 | debug("Found seq %d\n", *seqp); |
| 522 | return 0; |
| 523 | } |
| 524 | } |
| 525 | } |
| 526 | |
| 527 | debug("Not found\n"); |
| 528 | return -ENOENT; |
| 529 | } |
| 530 | |
Simon Glass | aac07d4 | 2014-09-04 16:27:24 -0600 | [diff] [blame] | 531 | int fdtdec_get_chosen_node(const void *blob, const char *name) |
| 532 | { |
| 533 | const char *prop; |
| 534 | int chosen_node; |
| 535 | int len; |
| 536 | |
| 537 | if (!blob) |
| 538 | return -FDT_ERR_NOTFOUND; |
| 539 | chosen_node = fdt_path_offset(blob, "/chosen"); |
| 540 | prop = fdt_getprop(blob, chosen_node, name, &len); |
| 541 | if (!prop) |
| 542 | return -FDT_ERR_NOTFOUND; |
| 543 | return fdt_path_offset(blob, prop); |
| 544 | } |
| 545 | |
Simon Glass | 9a263e5 | 2012-03-28 10:08:24 +0000 | [diff] [blame] | 546 | int fdtdec_check_fdt(void) |
| 547 | { |
| 548 | /* |
| 549 | * We must have an FDT, but we cannot panic() yet since the console |
| 550 | * is not ready. So for now, just assert(). Boards which need an early |
| 551 | * FDT (prior to console ready) will need to make their own |
| 552 | * arrangements and do their own checks. |
| 553 | */ |
| 554 | assert(!fdtdec_prepare_fdt()); |
| 555 | return 0; |
| 556 | } |
| 557 | |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 558 | /* |
| 559 | * This function is a little odd in that it accesses global data. At some |
| 560 | * point if the architecture board.c files merge this will make more sense. |
| 561 | * Even now, it is common code. |
| 562 | */ |
Simon Glass | 9a263e5 | 2012-03-28 10:08:24 +0000 | [diff] [blame] | 563 | int fdtdec_prepare_fdt(void) |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 564 | { |
Simon Glass | c309c2d | 2013-04-20 08:42:46 +0000 | [diff] [blame] | 565 | if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) || |
| 566 | fdt_check_header(gd->fdt_blob)) { |
Simon Glass | 9a263e5 | 2012-03-28 10:08:24 +0000 | [diff] [blame] | 567 | printf("No valid FDT found - please append one to U-Boot " |
| 568 | "binary, use u-boot-dtb.bin or define " |
Simon Glass | a733b06 | 2013-04-26 02:53:43 +0000 | [diff] [blame] | 569 | "CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n"); |
Simon Glass | 9a263e5 | 2012-03-28 10:08:24 +0000 | [diff] [blame] | 570 | return -1; |
| 571 | } |
Simon Glass | b5220bc | 2011-10-24 19:15:32 +0000 | [diff] [blame] | 572 | return 0; |
| 573 | } |
Simon Glass | d17da65 | 2012-02-27 10:52:35 +0000 | [diff] [blame] | 574 | |
| 575 | int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name) |
| 576 | { |
| 577 | const u32 *phandle; |
| 578 | int lookup; |
| 579 | |
Simon Glass | 1cb2323 | 2012-07-12 05:25:01 +0000 | [diff] [blame] | 580 | debug("%s: %s\n", __func__, prop_name); |
Simon Glass | d17da65 | 2012-02-27 10:52:35 +0000 | [diff] [blame] | 581 | phandle = fdt_getprop(blob, node, prop_name, NULL); |
| 582 | if (!phandle) |
| 583 | return -FDT_ERR_NOTFOUND; |
| 584 | |
| 585 | lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle)); |
| 586 | return lookup; |
| 587 | } |
| 588 | |
| 589 | /** |
| 590 | * Look up a property in a node and check that it has a minimum length. |
| 591 | * |
| 592 | * @param blob FDT blob |
| 593 | * @param node node to examine |
| 594 | * @param prop_name name of property to find |
| 595 | * @param min_len minimum property length in bytes |
| 596 | * @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not |
| 597 | found, or -FDT_ERR_BADLAYOUT if not enough data |
| 598 | * @return pointer to cell, which is only valid if err == 0 |
| 599 | */ |
| 600 | static const void *get_prop_check_min_len(const void *blob, int node, |
| 601 | const char *prop_name, int min_len, int *err) |
| 602 | { |
| 603 | const void *cell; |
| 604 | int len; |
| 605 | |
| 606 | debug("%s: %s\n", __func__, prop_name); |
| 607 | cell = fdt_getprop(blob, node, prop_name, &len); |
| 608 | if (!cell) |
| 609 | *err = -FDT_ERR_NOTFOUND; |
| 610 | else if (len < min_len) |
| 611 | *err = -FDT_ERR_BADLAYOUT; |
| 612 | else |
| 613 | *err = 0; |
| 614 | return cell; |
| 615 | } |
| 616 | |
| 617 | int fdtdec_get_int_array(const void *blob, int node, const char *prop_name, |
| 618 | u32 *array, int count) |
| 619 | { |
| 620 | const u32 *cell; |
| 621 | int i, err = 0; |
| 622 | |
| 623 | debug("%s: %s\n", __func__, prop_name); |
| 624 | cell = get_prop_check_min_len(blob, node, prop_name, |
| 625 | sizeof(u32) * count, &err); |
| 626 | if (!err) { |
| 627 | for (i = 0; i < count; i++) |
| 628 | array[i] = fdt32_to_cpu(cell[i]); |
| 629 | } |
| 630 | return err; |
| 631 | } |
| 632 | |
Simon Glass | a9f04d4 | 2014-11-10 18:00:19 -0700 | [diff] [blame] | 633 | int fdtdec_get_int_array_count(const void *blob, int node, |
| 634 | const char *prop_name, u32 *array, int count) |
| 635 | { |
| 636 | const u32 *cell; |
| 637 | int len, elems; |
| 638 | int i; |
| 639 | |
| 640 | debug("%s: %s\n", __func__, prop_name); |
| 641 | cell = fdt_getprop(blob, node, prop_name, &len); |
| 642 | if (!cell) |
| 643 | return -FDT_ERR_NOTFOUND; |
| 644 | elems = len / sizeof(u32); |
| 645 | if (count > elems) |
| 646 | count = elems; |
| 647 | for (i = 0; i < count; i++) |
| 648 | array[i] = fdt32_to_cpu(cell[i]); |
| 649 | |
| 650 | return count; |
| 651 | } |
| 652 | |
Simon Glass | 96875e7 | 2012-04-02 13:18:41 +0000 | [diff] [blame] | 653 | const u32 *fdtdec_locate_array(const void *blob, int node, |
| 654 | const char *prop_name, int count) |
| 655 | { |
| 656 | const u32 *cell; |
| 657 | int err; |
| 658 | |
| 659 | cell = get_prop_check_min_len(blob, node, prop_name, |
| 660 | sizeof(u32) * count, &err); |
| 661 | return err ? NULL : cell; |
| 662 | } |
| 663 | |
Simon Glass | d17da65 | 2012-02-27 10:52:35 +0000 | [diff] [blame] | 664 | int fdtdec_get_bool(const void *blob, int node, const char *prop_name) |
| 665 | { |
| 666 | const s32 *cell; |
| 667 | int len; |
| 668 | |
| 669 | debug("%s: %s\n", __func__, prop_name); |
| 670 | cell = fdt_getprop(blob, node, prop_name, &len); |
| 671 | return cell != NULL; |
| 672 | } |
Simon Glass | ed3ee5c | 2012-02-27 10:52:36 +0000 | [diff] [blame] | 673 | |
Simon Glass | 57068a7 | 2015-01-05 20:05:26 -0700 | [diff] [blame] | 674 | int fdtdec_parse_phandle_with_args(const void *blob, int src_node, |
| 675 | const char *list_name, |
| 676 | const char *cells_name, |
| 677 | int cell_count, int index, |
| 678 | struct fdtdec_phandle_args *out_args) |
| 679 | { |
| 680 | const __be32 *list, *list_end; |
| 681 | int rc = 0, size, cur_index = 0; |
| 682 | uint32_t count = 0; |
| 683 | int node = -1; |
| 684 | int phandle; |
| 685 | |
| 686 | /* Retrieve the phandle list property */ |
| 687 | list = fdt_getprop(blob, src_node, list_name, &size); |
| 688 | if (!list) |
| 689 | return -ENOENT; |
| 690 | list_end = list + size / sizeof(*list); |
| 691 | |
| 692 | /* Loop over the phandles until all the requested entry is found */ |
| 693 | while (list < list_end) { |
| 694 | rc = -EINVAL; |
| 695 | count = 0; |
| 696 | |
| 697 | /* |
| 698 | * If phandle is 0, then it is an empty entry with no |
| 699 | * arguments. Skip forward to the next entry. |
| 700 | */ |
| 701 | phandle = be32_to_cpup(list++); |
| 702 | if (phandle) { |
| 703 | /* |
| 704 | * Find the provider node and parse the #*-cells |
| 705 | * property to determine the argument length. |
| 706 | * |
| 707 | * This is not needed if the cell count is hard-coded |
| 708 | * (i.e. cells_name not set, but cell_count is set), |
| 709 | * except when we're going to return the found node |
| 710 | * below. |
| 711 | */ |
| 712 | if (cells_name || cur_index == index) { |
| 713 | node = fdt_node_offset_by_phandle(blob, |
| 714 | phandle); |
| 715 | if (!node) { |
| 716 | debug("%s: could not find phandle\n", |
| 717 | fdt_get_name(blob, src_node, |
| 718 | NULL)); |
| 719 | goto err; |
| 720 | } |
| 721 | } |
| 722 | |
| 723 | if (cells_name) { |
| 724 | count = fdtdec_get_int(blob, node, cells_name, |
| 725 | -1); |
| 726 | if (count == -1) { |
| 727 | debug("%s: could not get %s for %s\n", |
| 728 | fdt_get_name(blob, src_node, |
| 729 | NULL), |
| 730 | cells_name, |
| 731 | fdt_get_name(blob, node, |
| 732 | NULL)); |
| 733 | goto err; |
| 734 | } |
| 735 | } else { |
| 736 | count = cell_count; |
| 737 | } |
| 738 | |
| 739 | /* |
| 740 | * Make sure that the arguments actually fit in the |
| 741 | * remaining property data length |
| 742 | */ |
| 743 | if (list + count > list_end) { |
| 744 | debug("%s: arguments longer than property\n", |
| 745 | fdt_get_name(blob, src_node, NULL)); |
| 746 | goto err; |
| 747 | } |
| 748 | } |
| 749 | |
| 750 | /* |
| 751 | * All of the error cases above bail out of the loop, so at |
| 752 | * this point, the parsing is successful. If the requested |
| 753 | * index matches, then fill the out_args structure and return, |
| 754 | * or return -ENOENT for an empty entry. |
| 755 | */ |
| 756 | rc = -ENOENT; |
| 757 | if (cur_index == index) { |
| 758 | if (!phandle) |
| 759 | goto err; |
| 760 | |
| 761 | if (out_args) { |
| 762 | int i; |
| 763 | |
| 764 | if (count > MAX_PHANDLE_ARGS) { |
| 765 | debug("%s: too many arguments %d\n", |
| 766 | fdt_get_name(blob, src_node, |
| 767 | NULL), count); |
| 768 | count = MAX_PHANDLE_ARGS; |
| 769 | } |
| 770 | out_args->node = node; |
| 771 | out_args->args_count = count; |
| 772 | for (i = 0; i < count; i++) { |
| 773 | out_args->args[i] = |
| 774 | be32_to_cpup(list++); |
| 775 | } |
| 776 | } |
| 777 | |
| 778 | /* Found it! return success */ |
| 779 | return 0; |
| 780 | } |
| 781 | |
| 782 | node = -1; |
| 783 | list += count; |
| 784 | cur_index++; |
| 785 | } |
| 786 | |
| 787 | /* |
| 788 | * Result will be one of: |
| 789 | * -ENOENT : index is for empty phandle |
| 790 | * -EINVAL : parsing error on data |
| 791 | * [1..n] : Number of phandle (count mode; when index = -1) |
| 792 | */ |
| 793 | rc = index < 0 ? cur_index : -ENOENT; |
| 794 | err: |
| 795 | return rc; |
| 796 | } |
| 797 | |
Anton Staff | bed4d89 | 2012-04-17 09:01:28 +0000 | [diff] [blame] | 798 | int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name, |
| 799 | u8 *array, int count) |
| 800 | { |
| 801 | const u8 *cell; |
| 802 | int err; |
| 803 | |
| 804 | cell = get_prop_check_min_len(blob, node, prop_name, count, &err); |
| 805 | if (!err) |
| 806 | memcpy(array, cell, count); |
| 807 | return err; |
| 808 | } |
| 809 | |
| 810 | const u8 *fdtdec_locate_byte_array(const void *blob, int node, |
| 811 | const char *prop_name, int count) |
| 812 | { |
| 813 | const u8 *cell; |
| 814 | int err; |
| 815 | |
| 816 | cell = get_prop_check_min_len(blob, node, prop_name, count, &err); |
| 817 | if (err) |
| 818 | return NULL; |
| 819 | return cell; |
| 820 | } |
Abhilash Kesavan | 09258f1 | 2012-10-25 16:30:58 +0000 | [diff] [blame] | 821 | |
Abhilash Kesavan | 09258f1 | 2012-10-25 16:30:58 +0000 | [diff] [blame] | 822 | int fdtdec_get_config_int(const void *blob, const char *prop_name, |
| 823 | int default_val) |
| 824 | { |
| 825 | int config_node; |
| 826 | |
| 827 | debug("%s: %s\n", __func__, prop_name); |
| 828 | config_node = fdt_path_offset(blob, "/config"); |
| 829 | if (config_node < 0) |
| 830 | return default_val; |
| 831 | return fdtdec_get_int(blob, config_node, prop_name, default_val); |
| 832 | } |
Simon Glass | 332ab0d | 2012-10-25 16:30:59 +0000 | [diff] [blame] | 833 | |
Gabe Black | 79289c0 | 2012-10-25 16:31:04 +0000 | [diff] [blame] | 834 | int fdtdec_get_config_bool(const void *blob, const char *prop_name) |
| 835 | { |
| 836 | int config_node; |
| 837 | const void *prop; |
| 838 | |
| 839 | debug("%s: %s\n", __func__, prop_name); |
| 840 | config_node = fdt_path_offset(blob, "/config"); |
| 841 | if (config_node < 0) |
| 842 | return 0; |
| 843 | prop = fdt_get_property(blob, config_node, prop_name, NULL); |
| 844 | |
| 845 | return prop != NULL; |
| 846 | } |
| 847 | |
Simon Glass | 332ab0d | 2012-10-25 16:30:59 +0000 | [diff] [blame] | 848 | char *fdtdec_get_config_string(const void *blob, const char *prop_name) |
| 849 | { |
| 850 | const char *nodep; |
| 851 | int nodeoffset; |
| 852 | int len; |
| 853 | |
| 854 | debug("%s: %s\n", __func__, prop_name); |
| 855 | nodeoffset = fdt_path_offset(blob, "/config"); |
| 856 | if (nodeoffset < 0) |
| 857 | return NULL; |
| 858 | |
| 859 | nodep = fdt_getprop(blob, nodeoffset, prop_name, &len); |
| 860 | if (!nodep) |
| 861 | return NULL; |
| 862 | |
| 863 | return (char *)nodep; |
| 864 | } |
Simon Glass | f20c461 | 2012-10-25 16:31:00 +0000 | [diff] [blame] | 865 | |
Simon Glass | 7648983 | 2014-10-23 18:58:51 -0600 | [diff] [blame] | 866 | int fdtdec_decode_region(const void *blob, int node, const char *prop_name, |
| 867 | fdt_addr_t *basep, fdt_size_t *sizep) |
Simon Glass | f20c461 | 2012-10-25 16:31:00 +0000 | [diff] [blame] | 868 | { |
| 869 | const fdt_addr_t *cell; |
| 870 | int len; |
| 871 | |
Simon Glass | 7648983 | 2014-10-23 18:58:51 -0600 | [diff] [blame] | 872 | debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL), |
| 873 | prop_name); |
Simon Glass | f20c461 | 2012-10-25 16:31:00 +0000 | [diff] [blame] | 874 | cell = fdt_getprop(blob, node, prop_name, &len); |
Simon Glass | 7648983 | 2014-10-23 18:58:51 -0600 | [diff] [blame] | 875 | if (!cell || (len < sizeof(fdt_addr_t) * 2)) { |
| 876 | debug("cell=%p, len=%d\n", cell, len); |
Simon Glass | f20c461 | 2012-10-25 16:31:00 +0000 | [diff] [blame] | 877 | return -1; |
Simon Glass | 7648983 | 2014-10-23 18:58:51 -0600 | [diff] [blame] | 878 | } |
Simon Glass | f20c461 | 2012-10-25 16:31:00 +0000 | [diff] [blame] | 879 | |
Simon Glass | 7648983 | 2014-10-23 18:58:51 -0600 | [diff] [blame] | 880 | *basep = fdt_addr_to_cpu(*cell); |
| 881 | *sizep = fdt_size_to_cpu(cell[1]); |
| 882 | debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep, |
| 883 | (ulong)*sizep); |
| 884 | |
Simon Glass | f20c461 | 2012-10-25 16:31:00 +0000 | [diff] [blame] | 885 | return 0; |
| 886 | } |
Simon Glass | 006e73b | 2014-02-27 13:26:01 -0700 | [diff] [blame] | 887 | |
| 888 | /** |
| 889 | * Read a flash entry from the fdt |
| 890 | * |
| 891 | * @param blob FDT blob |
| 892 | * @param node Offset of node to read |
| 893 | * @param name Name of node being read |
| 894 | * @param entry Place to put offset and size of this node |
| 895 | * @return 0 if ok, -ve on error |
| 896 | */ |
| 897 | int fdtdec_read_fmap_entry(const void *blob, int node, const char *name, |
| 898 | struct fmap_entry *entry) |
| 899 | { |
Simon Glass | f3cc44f | 2014-10-23 18:58:52 -0600 | [diff] [blame] | 900 | const char *prop; |
Simon Glass | 006e73b | 2014-02-27 13:26:01 -0700 | [diff] [blame] | 901 | u32 reg[2]; |
| 902 | |
| 903 | if (fdtdec_get_int_array(blob, node, "reg", reg, 2)) { |
| 904 | debug("Node '%s' has bad/missing 'reg' property\n", name); |
| 905 | return -FDT_ERR_NOTFOUND; |
| 906 | } |
| 907 | entry->offset = reg[0]; |
| 908 | entry->length = reg[1]; |
Simon Glass | f3cc44f | 2014-10-23 18:58:52 -0600 | [diff] [blame] | 909 | entry->used = fdtdec_get_int(blob, node, "used", entry->length); |
| 910 | prop = fdt_getprop(blob, node, "compress", NULL); |
| 911 | entry->compress_algo = prop && !strcmp(prop, "lzo") ? |
| 912 | FMAP_COMPRESS_LZO : FMAP_COMPRESS_NONE; |
| 913 | prop = fdt_getprop(blob, node, "hash", &entry->hash_size); |
| 914 | entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE; |
| 915 | entry->hash = (uint8_t *)prop; |
Simon Glass | 006e73b | 2014-02-27 13:26:01 -0700 | [diff] [blame] | 916 | |
| 917 | return 0; |
| 918 | } |
Thierry Reding | 56f4224 | 2014-08-26 17:33:53 +0200 | [diff] [blame] | 919 | |
| 920 | static u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells) |
| 921 | { |
| 922 | u64 number = 0; |
| 923 | |
| 924 | while (cells--) |
| 925 | number = (number << 32) | fdt32_to_cpu(*ptr++); |
| 926 | |
| 927 | return number; |
| 928 | } |
| 929 | |
| 930 | int fdt_get_resource(const void *fdt, int node, const char *property, |
| 931 | unsigned int index, struct fdt_resource *res) |
| 932 | { |
| 933 | const fdt32_t *ptr, *end; |
| 934 | int na, ns, len, parent; |
| 935 | unsigned int i = 0; |
| 936 | |
| 937 | parent = fdt_parent_offset(fdt, node); |
| 938 | if (parent < 0) |
| 939 | return parent; |
| 940 | |
| 941 | na = fdt_address_cells(fdt, parent); |
| 942 | ns = fdt_size_cells(fdt, parent); |
| 943 | |
| 944 | ptr = fdt_getprop(fdt, node, property, &len); |
| 945 | if (!ptr) |
| 946 | return len; |
| 947 | |
| 948 | end = ptr + len / sizeof(*ptr); |
| 949 | |
| 950 | while (ptr + na + ns <= end) { |
| 951 | if (i == index) { |
| 952 | res->start = res->end = fdtdec_get_number(ptr, na); |
| 953 | res->end += fdtdec_get_number(&ptr[na], ns) - 1; |
| 954 | return 0; |
| 955 | } |
| 956 | |
| 957 | ptr += na + ns; |
| 958 | i++; |
| 959 | } |
| 960 | |
| 961 | return -FDT_ERR_NOTFOUND; |
| 962 | } |
| 963 | |
| 964 | int fdt_get_named_resource(const void *fdt, int node, const char *property, |
| 965 | const char *prop_names, const char *name, |
| 966 | struct fdt_resource *res) |
| 967 | { |
| 968 | int index; |
| 969 | |
| 970 | index = fdt_find_string(fdt, node, prop_names, name); |
| 971 | if (index < 0) |
| 972 | return index; |
| 973 | |
| 974 | return fdt_get_resource(fdt, node, property, index, res); |
| 975 | } |
Thierry Reding | 9f85eee | 2014-08-26 17:33:54 +0200 | [diff] [blame] | 976 | |
Simon Glass | 2640387 | 2014-10-23 18:58:56 -0600 | [diff] [blame] | 977 | int fdtdec_decode_memory_region(const void *blob, int config_node, |
| 978 | const char *mem_type, const char *suffix, |
| 979 | fdt_addr_t *basep, fdt_size_t *sizep) |
| 980 | { |
| 981 | char prop_name[50]; |
| 982 | const char *mem; |
| 983 | fdt_size_t size, offset_size; |
| 984 | fdt_addr_t base, offset; |
| 985 | int node; |
| 986 | |
| 987 | if (config_node == -1) { |
| 988 | config_node = fdt_path_offset(blob, "/config"); |
| 989 | if (config_node < 0) { |
| 990 | debug("%s: Cannot find /config node\n", __func__); |
| 991 | return -ENOENT; |
| 992 | } |
| 993 | } |
| 994 | if (!suffix) |
| 995 | suffix = ""; |
| 996 | |
| 997 | snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type, |
| 998 | suffix); |
| 999 | mem = fdt_getprop(blob, config_node, prop_name, NULL); |
| 1000 | if (!mem) { |
| 1001 | debug("%s: No memory type for '%s', using /memory\n", __func__, |
| 1002 | prop_name); |
| 1003 | mem = "/memory"; |
| 1004 | } |
| 1005 | |
| 1006 | node = fdt_path_offset(blob, mem); |
| 1007 | if (node < 0) { |
| 1008 | debug("%s: Failed to find node '%s': %s\n", __func__, mem, |
| 1009 | fdt_strerror(node)); |
| 1010 | return -ENOENT; |
| 1011 | } |
| 1012 | |
| 1013 | /* |
| 1014 | * Not strictly correct - the memory may have multiple banks. We just |
| 1015 | * use the first |
| 1016 | */ |
| 1017 | if (fdtdec_decode_region(blob, node, "reg", &base, &size)) { |
| 1018 | debug("%s: Failed to decode memory region %s\n", __func__, |
| 1019 | mem); |
| 1020 | return -EINVAL; |
| 1021 | } |
| 1022 | |
| 1023 | snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type, |
| 1024 | suffix); |
| 1025 | if (fdtdec_decode_region(blob, config_node, prop_name, &offset, |
| 1026 | &offset_size)) { |
| 1027 | debug("%s: Failed to decode memory region '%s'\n", __func__, |
| 1028 | prop_name); |
| 1029 | return -EINVAL; |
| 1030 | } |
| 1031 | |
| 1032 | *basep = base + offset; |
| 1033 | *sizep = offset_size; |
| 1034 | |
| 1035 | return 0; |
| 1036 | } |
Heiko Schocher | 29a23f9 | 2014-03-03 12:19:30 +0100 | [diff] [blame] | 1037 | #endif |