u-boot/lib/fdtdec.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2011 The Chromium OS Authors.
*/
#ifndef USE_HOSTCC
#include <common.h>
#include <boot_fit.h>
#include <dm.h>
#include <dm/of_extra.h>
#include <errno.h>
#include <fdtdec.h>
#include <fdt_support.h>
#include <linux/libfdt.h>
#include <serial.h>
#include <asm/sections.h>
#include <linux/ctype.h>
#include <linux/ioport.h>
#include <linux/lzo.h>
DECLARE_GLOBAL_DATA_PTR;
/*
* Here are the type we know about. One day we might allow drivers to
* register. For now we just put them here. The COMPAT macro allows us to
* turn this into a sparse list later, and keeps the ID with the name.
*
* NOTE: This list is basically a TODO list for things that need to be
* converted to driver model. So don't add new things here unless there is a
* good reason why driver-model conversion is infeasible. Examples include
* things which are used before driver model is available.
*/
#define COMPAT(id, name) name
static const char * const compat_names[COMPAT_COUNT] = {
COMPAT(UNKNOWN, "<none>"),
COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),
COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),
COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),
COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),
COMPAT(SMSC_LAN9215, "smsc,lan9215"),
COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),
COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),
COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),
COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),
COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),
COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),
COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),
COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),
COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),
COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),
COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),
COMPAT(INTEL_MICROCODE, "intel,microcode"),
COMPAT(AMS_AS3722, "ams,as3722"),
COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),
COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),
COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),
COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),
COMPAT(COMPAT_SUNXI_NAND, "allwinner,sun4i-a10-nand"),
COMPAT(ALTERA_SOCFPGA_CLK, "altr,clk-mgr"),
COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE, "pinctrl-single"),
COMPAT(ALTERA_SOCFPGA_H2F_BRG, "altr,socfpga-hps2fpga-bridge"),
COMPAT(ALTERA_SOCFPGA_LWH2F_BRG, "altr,socfpga-lwhps2fpga-bridge"),
COMPAT(ALTERA_SOCFPGA_F2H_BRG, "altr,socfpga-fpga2hps-bridge"),
COMPAT(ALTERA_SOCFPGA_F2SDR0, "altr,socfpga-fpga2sdram0-bridge"),
COMPAT(ALTERA_SOCFPGA_F2SDR1, "altr,socfpga-fpga2sdram1-bridge"),
COMPAT(ALTERA_SOCFPGA_F2SDR2, "altr,socfpga-fpga2sdram2-bridge"),
COMPAT(ALTERA_SOCFPGA_FPGA0, "altr,socfpga-a10-fpga-mgr"),
COMPAT(ALTERA_SOCFPGA_NOC, "altr,socfpga-a10-noc"),
COMPAT(ALTERA_SOCFPGA_CLK_INIT, "altr,socfpga-a10-clk-init")
};
const char *fdtdec_get_compatible(enum fdt_compat_id id)
{
/* We allow reading of the 'unknown' ID for testing purposes */
assert(id >= 0 && id < COMPAT_COUNT);
return compat_names[id];
}
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,
const char *prop_name, int index, int na,
int ns, fdt_size_t *sizep,
bool translate)
{
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
const fdt32_t *prop, *prop_end;
const fdt32_t *prop_addr, *prop_size, *prop_after_size;
int len;
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
fdt_addr_t addr;
debug("%s: %s: ", __func__, prop_name);
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
debug("(na too large for fdt_addr_t type)\n");
return FDT_ADDR_T_NONE;
}
if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
debug("(ns too large for fdt_size_t type)\n");
return FDT_ADDR_T_NONE;
}
prop = fdt_getprop(blob, node, prop_name, &len);
if (!prop) {
debug("(not found)\n");
return FDT_ADDR_T_NONE;
}
prop_end = prop + (len / sizeof(*prop));
prop_addr = prop + (index * (na + ns));
prop_size = prop_addr + na;
prop_after_size = prop_size + ns;
if (prop_after_size > prop_end) {
debug("(not enough data: expected >= %d cells, got %d cells)\n",
(u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
return FDT_ADDR_T_NONE;
}
#if CONFIG_IS_ENABLED(OF_TRANSLATE)
if (translate)
addr = fdt_translate_address(blob, node, prop_addr);
else
#endif
addr = fdtdec_get_number(prop_addr, na);
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
if (sizep) {
*sizep = fdtdec_get_number(prop_size, ns);
debug("addr=%08llx, size=%llx\n", (unsigned long long)addr,
(unsigned long long)*sizep);
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
} else {
debug("addr=%08llx\n", (unsigned long long)addr);
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
}
return addr;
}
fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,
int node, const char *prop_name,
int index, fdt_size_t *sizep,
bool translate)
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
{
int na, ns;
debug("%s: ", __func__);
na = fdt_address_cells(blob, parent);
if (na < 1) {
debug("(bad #address-cells)\n");
return FDT_ADDR_T_NONE;
}
ns = fdt_size_cells(blob, parent);
if (ns < 0) {
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
debug("(bad #size-cells)\n");
return FDT_ADDR_T_NONE;
}
debug("na=%d, ns=%d, ", na, ns);
return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,
ns, sizep, translate);
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
}
fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,
const char *prop_name, int index,
fdt_size_t *sizep,
bool translate)
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
{
int parent;
debug("%s: ", __func__);
parent = fdt_parent_offset(blob, node);
if (parent < 0) {
debug("(no parent found)\n");
return FDT_ADDR_T_NONE;
}
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,
index, sizep, translate);
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
}
fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,
const char *prop_name, fdt_size_t *sizep)
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
{
fdt: fix fdtdec_get_addr_size not to require any size cells fdtdec_get_addr_size() may be used in two cases: a) With sizep supplied, in which case both an address and a size are parsed from DT. In this case, the DT property must be large enough to contain both values. b) With sizep NULL, in which case only an address is parsed from DT. In this case, the DT property only need be large enough to contain this address value. Commit 02464e386bb5 "fdt: add new fdt address parsing functions" broke this relaxed checking, and required the DT property to contain both an address and a size value in all cases. Fix fdtdec_get_addr_size() to vary ns based on whether the size value is being parsed from the DT or not. This is safe since the function only parses the first entry in the property, so the overall value of (na + ns) need not be accurate, since it is never used to step through the property data to find other entries. Besides, this fixed behaviour essentially matches the original behaviour before the patch this patch fixes. (The original code validated that the property was exactly the length of either na or (na + ns), whereas the current code only validates that the property is at least that long. For non-failure cases, the two behaviours are identical). Cc: Przemyslaw Marczak <p.marczak@samsung.com> Cc: Simon Glass <sjg@chromium.org> Cc: Thierry Reding <treding@nvidia.com> Cc: Bin Meng <bmeng.cn@gmail.com> Cc: Michal Suchanek <hramrach@gmail.com> Fixes: 02464e386bb5 ("fdt: add new fdt address parsing functions") Reported-by: Przemyslaw Marczak <p.marczak@samsung.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Tested-by: Przemyslaw Marczak <p.marczak@samsung.com> Acked-by: Simon Glass <sjg@chromium.org>
2015-09-25 16:11:41 +00:00
int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;
fdt: add new fdt address parsing functions fdtdec_get_addr_size() hard-codes the number of cells used to represent an address or size in DT. This is incorrect in many cases depending on the DT binding for a particular node or property (e.g. it is incorrect for the "reg" property). In most cases, DT parsing code must use the properties #address-cells and #size-cells to parse addres properties. This change splits up the implementation of fdtdec_get_addr_size() so that the core logic can be used for both hard-coded and non-hard-coded cases. Various wrapper functions are implemented that support cases where hard-coded cell counts should or should not be used, and where the client does and doesn't know the parent node ID that contains the properties #address-cells and #size-cells. dev_get_addr() is updated to use the new functions. Core functionality in fdtdec_get_addr_size_fixed() is widely tested via fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and dev_get_addr() by manually modifying the Tegra I2C driver to invoke them. Much of the core implementation of fdtdec_get_addr_size_fixed(), fdtdec_get_addr_size_auto_parent(), and fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit". Based-on-work-by: Thierry Reding <treding@nvidia.com> Cc: Thierry Reding <treding@nvidia.com> Cc: Simon Glass <sjg@chromium.org> Cc: Michal Suchanek <hramrach@gmail.com> Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org> Dropped #define DEBUG at the top of fdtdec.c: Signed-off-by: Simon Glass <sjg@chromium.org>
2015-08-06 21:31:02 +00:00
return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
sizeof(fdt_addr_t) / sizeof(fdt32_t),
ns, sizep, false);
}
fdt_addr_t fdtdec_get_addr(const void *blob, int node, const char *prop_name)
{
return fdtdec_get_addr_size(blob, node, prop_name, NULL);
}
#if defined(CONFIG_PCI) && defined(CONFIG_DM_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)fdt32_to_cpu(cell[0]),
(ulong)fdt32_to_cpu(cell[1]),
(ulong)fdt32_to_cpu(cell[2]));
if ((fdt32_to_cpu(*cell) & type) == type) {
addr->phys_hi = fdt32_to_cpu(cell[0]);
addr->phys_mid = fdt32_to_cpu(cell[1]);
addr->phys_lo = fdt32_to_cpu(cell[1]);
break;
}
cell += (FDT_PCI_ADDR_CELLS +
FDT_PCI_SIZE_CELLS);
}
if (i == num) {
ret = -ENXIO;
goto fail;
}
return 0;
}
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) {
len = strlen(list);
if (len >= strlen("pciVVVV,DDDD")) {
char *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;
}
}
list += (len + 1);
}
return -ENOENT;
}
int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
u32 *bar)
{
int barnum;
/* 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 = dm_pci_read_bar32(dev, barnum);
return 0;
}
#endif
uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
uint64_t default_val)
{
const uint64_t *cell64;
int length;
cell64 = fdt_getprop(blob, node, prop_name, &length);
if (!cell64 || length < sizeof(*cell64))
return default_val;
return fdt64_to_cpu(*cell64);
}
int fdtdec_get_is_enabled(const void *blob, int node)
{
const char *cell;
/*
* It should say "okay", so only allow that. Some fdts use "ok" but
* this is a bug. Please fix your device tree source file. See here
* for discussion:
*
* http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
*/
cell = fdt_getprop(blob, node, "status", NULL);
if (cell)
return strcmp(cell, "okay") == 0;
return 1;
}
enum fdt_compat_id fdtdec_lookup(const void *blob, int node)
{
enum fdt_compat_id id;
/* Search our drivers */
for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)
if (fdt_node_check_compatible(blob, node,
compat_names[id]) == 0)
return id;
return COMPAT_UNKNOWN;
}
int fdtdec_next_compatible(const void *blob, int node, enum fdt_compat_id id)
{
return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
}
int fdtdec_next_compatible_subnode(const void *blob, int node,
enum fdt_compat_id id, int *depthp)
{
do {
node = fdt_next_node(blob, node, depthp);
} while (*depthp > 1);
/* If this is a direct subnode, and compatible, return it */
if (*depthp == 1 && 0 == fdt_node_check_compatible(
blob, node, compat_names[id]))
return node;
return -FDT_ERR_NOTFOUND;
}
int fdtdec_next_alias(const void *blob, const char *name, enum fdt_compat_id id,
int *upto)
{
#define MAX_STR_LEN 20
char str[MAX_STR_LEN + 20];
int node, err;
/* snprintf() is not available */
assert(strlen(name) < MAX_STR_LEN);
sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);
node = fdt_path_offset(blob, str);
if (node < 0)
return node;
err = fdt_node_check_compatible(blob, node, compat_names[id]);
if (err < 0)
return err;
if (err)
return -FDT_ERR_NOTFOUND;
(*upto)++;
return node;
}
int fdtdec_find_aliases_for_id(const void *blob, const char *name,
enum fdt_compat_id id, int *node_list,
int maxcount)
{
memset(node_list, '\0', sizeof(*node_list) * maxcount);
return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
}
/* TODO: Can we tighten this code up a little? */
int fdtdec_add_aliases_for_id(const void *blob, const char *name,
enum fdt_compat_id id, int *node_list,
int maxcount)
{
int name_len = strlen(name);
int nodes[maxcount];
int num_found = 0;
int offset, node;
int alias_node;
int count;
int i, j;
/* find the alias node if present */
alias_node = fdt_path_offset(blob, "/aliases");
/*
* start with nothing, and we can assume that the root node can't
* match
*/
memset(nodes, '\0', sizeof(nodes));
/* First find all the compatible nodes */
for (node = count = 0; node >= 0 && count < maxcount;) {
node = fdtdec_next_compatible(blob, node, id);
if (node >= 0)
nodes[count++] = node;
}
if (node >= 0)
debug("%s: warning: maxcount exceeded with alias '%s'\n",
__func__, name);
/* Now find all the aliases */
for (offset = fdt_first_property_offset(blob, alias_node);
offset > 0;
offset = fdt_next_property_offset(blob, offset)) {
const struct fdt_property *prop;
const char *path;
int number;
int found;
node = 0;
prop = fdt_get_property_by_offset(blob, offset, NULL);
path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
if (prop->len && 0 == strncmp(path, name, name_len))
node = fdt_path_offset(blob, prop->data);
if (node <= 0)
continue;
/* Get the alias number */
number = simple_strtoul(path + name_len, NULL, 10);
if (number < 0 || number >= maxcount) {
debug("%s: warning: alias '%s' is out of range\n",
__func__, path);
continue;
}
/* Make sure the node we found is actually in our list! */
found = -1;
for (j = 0; j < count; j++)
if (nodes[j] == node) {
found = j;
break;
}
if (found == -1) {
debug("%s: warning: alias '%s' points to a node "
"'%s' that is missing or is not compatible "
" with '%s'\n", __func__, path,
fdt_get_name(blob, node, NULL),
compat_names[id]);
continue;
}
/*
* Add this node to our list in the right place, and mark
* it as done.
*/
if (fdtdec_get_is_enabled(blob, node)) {
if (node_list[number]) {
debug("%s: warning: alias '%s' requires that "
"a node be placed in the list in a "
"position which is already filled by "
"node '%s'\n", __func__, path,
fdt_get_name(blob, node, NULL));
continue;
}
node_list[number] = node;
if (number >= num_found)
num_found = number + 1;
}
nodes[found] = 0;
}
/* Add any nodes not mentioned by an alias */
for (i = j = 0; i < maxcount; i++) {
if (!node_list[i]) {
for (; j < maxcount; j++)
if (nodes[j] &&
fdtdec_get_is_enabled(blob, nodes[j]))
break;
/* Have we run out of nodes to add? */
if (j == maxcount)
break;
assert(!node_list[i]);
node_list[i] = nodes[j++];
if (i >= num_found)
num_found = i + 1;
}
}
return num_found;
}
int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
int *seqp)
{
int base_len = strlen(base);
const char *find_name;
int find_namelen;
int prop_offset;
int aliases;
find_name = fdt_get_name(blob, offset, &find_namelen);
debug("Looking for '%s' at %d, name %s\n", base, offset, find_name);
aliases = fdt_path_offset(blob, "/aliases");
for (prop_offset = fdt_first_property_offset(blob, aliases);
prop_offset > 0;
prop_offset = fdt_next_property_offset(blob, prop_offset)) {
const char *prop;
const char *name;
const char *slash;
int len, val;
prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
debug(" - %s, %s\n", name, prop);
if (len < find_namelen || *prop != '/' || prop[len - 1] ||
strncmp(name, base, base_len))
continue;
slash = strrchr(prop, '/');
if (strcmp(slash + 1, find_name))
continue;
val = trailing_strtol(name);
if (val != -1) {
*seqp = val;
debug("Found seq %d\n", *seqp);
return 0;
}
}
debug("Not found\n");
return -ENOENT;
}
const char *fdtdec_get_chosen_prop(const void *blob, const char *name)
{
int chosen_node;
if (!blob)
return NULL;
chosen_node = fdt_path_offset(blob, "/chosen");
return fdt_getprop(blob, chosen_node, name, NULL);
}
int fdtdec_get_chosen_node(const void *blob, const char *name)
{
const char *prop;
prop = fdtdec_get_chosen_prop(blob, name);
if (!prop)
return -FDT_ERR_NOTFOUND;
return fdt_path_offset(blob, prop);
}
int fdtdec_check_fdt(void)
{
/*
* We must have an FDT, but we cannot panic() yet since the console
* is not ready. So for now, just assert(). Boards which need an early
* FDT (prior to console ready) will need to make their own
* arrangements and do their own checks.
*/
assert(!fdtdec_prepare_fdt());
return 0;
}
/*
* This function is a little odd in that it accesses global data. At some
* point if the architecture board.c files merge this will make more sense.
* Even now, it is common code.
*/
int fdtdec_prepare_fdt(void)
{
if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
fdt_check_header(gd->fdt_blob)) {
#ifdef CONFIG_SPL_BUILD
puts("Missing DTB\n");
#else
puts("No valid device tree binary found - please append one to U-Boot binary, use u-boot-dtb.bin or define CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>\n");
# ifdef DEBUG
if (gd->fdt_blob) {
printf("fdt_blob=%p\n", gd->fdt_blob);
print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
32, 0);
}
# endif
#endif
return -1;
}
return 0;
}
int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
{
const u32 *phandle;
int lookup;
debug("%s: %s\n", __func__, prop_name);
phandle = fdt_getprop(blob, node, prop_name, NULL);
if (!phandle)
return -FDT_ERR_NOTFOUND;
lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
return lookup;
}
/**
* Look up a property in a node and check that it has a minimum length.
*
* @param blob FDT blob
* @param node node to examine
* @param prop_name name of property to find
* @param min_len minimum property length in bytes
* @param err 0 if ok, or -FDT_ERR_NOTFOUND if the property is not
found, or -FDT_ERR_BADLAYOUT if not enough data
* @return pointer to cell, which is only valid if err == 0
*/
static const void *get_prop_check_min_len(const void *blob, int node,
const char *prop_name, int min_len,
int *err)
{
const void *cell;
int len;
debug("%s: %s\n", __func__, prop_name);
cell = fdt_getprop(blob, node, prop_name, &len);
if (!cell)
*err = -FDT_ERR_NOTFOUND;
else if (len < min_len)
*err = -FDT_ERR_BADLAYOUT;
else
*err = 0;
return cell;
}
int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,
u32 *array, int count)
{
const u32 *cell;
int err = 0;
debug("%s: %s\n", __func__, prop_name);
cell = get_prop_check_min_len(blob, node, prop_name,
sizeof(u32) * count, &err);
if (!err) {
int i;
for (i = 0; i < count; i++)
array[i] = fdt32_to_cpu(cell[i]);
}
return err;
}
int fdtdec_get_int_array_count(const void *blob, int node,
const char *prop_name, u32 *array, int count)
{
const u32 *cell;
int len, elems;
int i;
debug("%s: %s\n", __func__, prop_name);
cell = fdt_getprop(blob, node, prop_name, &len);
if (!cell)
return -FDT_ERR_NOTFOUND;
elems = len / sizeof(u32);
if (count > elems)
count = elems;
for (i = 0; i < count; i++)
array[i] = fdt32_to_cpu(cell[i]);
return count;
}
const u32 *fdtdec_locate_array(const void *blob, int node,
const char *prop_name, int count)
{
const u32 *cell;
int err;
cell = get_prop_check_min_len(blob, node, prop_name,
sizeof(u32) * count, &err);
return err ? NULL : cell;
}
int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
{
const s32 *cell;
int len;
debug("%s: %s\n", __func__, prop_name);
cell = fdt_getprop(blob, node, prop_name, &len);
return cell != NULL;
}
fdt: Add basic support for decoding GPIO definitions This adds some support into fdtdec for reading GPIO definitions from the fdt. We permit up to FDT_GPIO_MAX GPIOs in the system. Each GPIO is of the form: gpio-function-name = <phandle gpio_num flags>; where: phandle is a pointer to the GPIO node gpio_num is the number of the GPIO (0 to 223) flags is a flag, as follows: bit meaning 0 0=polarity normal, 1=active low (inverted) An example is: enable-propounder-gpios = <&gpio 43 0>; which means that GPIO 43 is used to enable the propounder (setting the GPIO high), or that you can detect that the propounder is enabled by checking if the GPIO is high (the fdt does not indicate input/output). Two main functions are provided: fdtdec_decode_gpio() reads a GPIO property from an fdt node and decodes it into a structure. fdtdec_setup_gpio() sets up the GPIO by calling gpio_request for you. Both functions can cope with the property being missing, which is taken to mean that that GPIO function is not available or is not needed. [For reference, from Stephen Warren <swarren@nvidia.com>. It may be that we add this extra complexity later if needed: The correct way to parse such a GPIO property in general is: * Read the first cell. * Find the node referenced by the phandle (the controller). * Ensure property gpio-controller is present in the controller node. * Read property #gpio-cells from the controller node. * Extract #gpio-cells from the original property. * Keep processing more cells from the original property; there may be multiple GPIOs listed. According to the binding documentation in the Linux kernel, Samsung Exynos4 doesn't use this format, and while all other chips do have a flags cell, about 50% of the controllers indicate the cell is unused. ] Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
2012-02-27 10:52:36 +00:00
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 __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);
/* Loop over the phandles until all the requested entry is found */
while (list < list_end) {
rc = -EINVAL;
count = 0;
/*
* 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;
}
}
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;
}
/*
* 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;
}
}
/*
* 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++);
}
}
/* Found it! return success */
return 0;
}
node = -1;
list += count;
cur_index++;
}
/*
* 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)
*/
rc = index < 0 ? cur_index : -ENOENT;
err:
return rc;
}
int fdtdec_get_child_count(const void *blob, int node)
{
int subnode;
int num = 0;
fdt_for_each_subnode(subnode, blob, node)
num++;
return num;
}
int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
u8 *array, int count)
{
const u8 *cell;
int err;
cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
if (!err)
memcpy(array, cell, count);
return err;
}
const u8 *fdtdec_locate_byte_array(const void *blob, int node,
const char *prop_name, int count)
{
const u8 *cell;
int err;
cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
if (err)
return NULL;
return cell;
}
int fdtdec_get_config_int(const void *blob, const char *prop_name,
int default_val)
{
int config_node;
debug("%s: %s\n", __func__, prop_name);
config_node = fdt_path_offset(blob, "/config");
if (config_node < 0)
return default_val;
return fdtdec_get_int(blob, config_node, prop_name, default_val);
}
int fdtdec_get_config_bool(const void *blob, const char *prop_name)
{
int config_node;
const void *prop;
debug("%s: %s\n", __func__, prop_name);
config_node = fdt_path_offset(blob, "/config");
if (config_node < 0)
return 0;
prop = fdt_get_property(blob, config_node, prop_name, NULL);
return prop != NULL;
}
char *fdtdec_get_config_string(const void *blob, const char *prop_name)
{
const char *nodep;
int nodeoffset;
int len;
debug("%s: %s\n", __func__, prop_name);
nodeoffset = fdt_path_offset(blob, "/config");
if (nodeoffset < 0)
return NULL;
nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
if (!nodep)
return NULL;
return (char *)nodep;
}
int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
fdt_addr_t *basep, fdt_size_t *sizep)
{
const fdt_addr_t *cell;
int len;
debug("%s: %s: %s\n", __func__, fdt_get_name(blob, node, NULL),
prop_name);
cell = fdt_getprop(blob, node, prop_name, &len);
if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
debug("cell=%p, len=%d\n", cell, len);
return -1;
}
*basep = fdt_addr_to_cpu(*cell);
*sizep = fdt_size_to_cpu(cell[1]);
debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
(ulong)*sizep);
return 0;
}
u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)
{
u64 number = 0;
while (cells--)
number = (number << 32) | fdt32_to_cpu(*ptr++);
return number;
}
int fdt_get_resource(const void *fdt, int node, const char *property,
unsigned int index, struct fdt_resource *res)
{
const fdt32_t *ptr, *end;
int na, ns, len, parent;
unsigned int i = 0;
parent = fdt_parent_offset(fdt, node);
if (parent < 0)
return parent;
na = fdt_address_cells(fdt, parent);
ns = fdt_size_cells(fdt, parent);
ptr = fdt_getprop(fdt, node, property, &len);
if (!ptr)
return len;
end = ptr + len / sizeof(*ptr);
while (ptr + na + ns <= end) {
if (i == index) {
res->start = fdtdec_get_number(ptr, na);
res->end = res->start;
res->end += fdtdec_get_number(&ptr[na], ns) - 1;
return 0;
}
ptr += na + ns;
i++;
}
return -FDT_ERR_NOTFOUND;
}
int fdt_get_named_resource(const void *fdt, int node, const char *property,
const char *prop_names, const char *name,
struct fdt_resource *res)
{
int index;
index = fdt_stringlist_search(fdt, node, prop_names, name);
if (index < 0)
return index;
return fdt_get_resource(fdt, node, property, index, res);
}
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)
{
char prop_name[50];
const char *mem;
fdt_size_t size, offset_size;
fdt_addr_t base, offset;
int node;
if (config_node == -1) {
config_node = fdt_path_offset(blob, "/config");
if (config_node < 0) {
debug("%s: Cannot find /config node\n", __func__);
return -ENOENT;
}
}
if (!suffix)
suffix = "";
snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
suffix);
mem = fdt_getprop(blob, config_node, prop_name, NULL);
if (!mem) {
debug("%s: No memory type for '%s', using /memory\n", __func__,
prop_name);
mem = "/memory";
}
node = fdt_path_offset(blob, mem);
if (node < 0) {
debug("%s: Failed to find node '%s': %s\n", __func__, mem,
fdt_strerror(node));
return -ENOENT;
}
/*
* Not strictly correct - the memory may have multiple banks. We just
* use the first
*/
if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
debug("%s: Failed to decode memory region %s\n", __func__,
mem);
return -EINVAL;
}
snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
suffix);
if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
&offset_size)) {
debug("%s: Failed to decode memory region '%s'\n", __func__,
prop_name);
return -EINVAL;
}
*basep = base + offset;
*sizep = offset_size;
return 0;
}
static int decode_timing_property(const void *blob, int node, const char *name,
struct timing_entry *result)
{
int length, ret = 0;
const u32 *prop;
prop = fdt_getprop(blob, node, name, &length);
if (!prop) {
debug("%s: could not find property %s\n",
fdt_get_name(blob, node, NULL), name);
return length;
}
if (length == sizeof(u32)) {
result->typ = fdtdec_get_int(blob, node, name, 0);
result->min = result->typ;
result->max = result->typ;
} else {
ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
}
return ret;
}
int fdtdec_decode_display_timing(const void *blob, int parent, int index,
struct display_timing *dt)
{
int i, node, timings_node;
u32 val = 0;
int ret = 0;
timings_node = fdt_subnode_offset(blob, parent, "display-timings");
if (timings_node < 0)
return timings_node;
for (i = 0, node = fdt_first_subnode(blob, timings_node);
node > 0 && i != index;
node = fdt_next_subnode(blob, node))
i++;
if (node < 0)
return node;
memset(dt, 0, sizeof(*dt));
ret |= decode_timing_property(blob, node, "hback-porch",
&dt->hback_porch);
ret |= decode_timing_property(blob, node, "hfront-porch",
&dt->hfront_porch);
ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
ret |= decode_timing_property(blob, node, "vback-porch",
&dt->vback_porch);
ret |= decode_timing_property(blob, node, "vfront-porch",
&dt->vfront_porch);
ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
ret |= decode_timing_property(blob, node, "clock-frequency",
&dt->pixelclock);
dt->flags = 0;
val = fdtdec_get_int(blob, node, "vsync-active", -1);
if (val != -1) {
dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
DISPLAY_FLAGS_VSYNC_LOW;
}
val = fdtdec_get_int(blob, node, "hsync-active", -1);
if (val != -1) {
dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
DISPLAY_FLAGS_HSYNC_LOW;
}
val = fdtdec_get_int(blob, node, "de-active", -1);
if (val != -1) {
dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
DISPLAY_FLAGS_DE_LOW;
}
val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
if (val != -1) {
dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
DISPLAY_FLAGS_PIXDATA_NEGEDGE;
}
if (fdtdec_get_bool(blob, node, "interlaced"))
dt->flags |= DISPLAY_FLAGS_INTERLACED;
if (fdtdec_get_bool(blob, node, "doublescan"))
dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
if (fdtdec_get_bool(blob, node, "doubleclk"))
dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
return ret;
}
int fdtdec_setup_mem_size_base(void)
{
int ret, mem;
struct fdt_resource res;
mem = fdt_path_offset(gd->fdt_blob, "/memory");
if (mem < 0) {
debug("%s: Missing /memory node\n", __func__);
return -EINVAL;
}
ret = fdt_get_resource(gd->fdt_blob, mem, "reg", 0, &res);
if (ret != 0) {
debug("%s: Unable to decode first memory bank\n", __func__);
return -EINVAL;
}
gd->ram_size = (phys_size_t)(res.end - res.start + 1);
gd->ram_base = (unsigned long)res.start;
debug("%s: Initial DRAM size %llx\n", __func__,
(unsigned long long)gd->ram_size);
return 0;
}
#if defined(CONFIG_NR_DRAM_BANKS)
static ofnode get_next_memory_node(ofnode mem)
{
do {
mem = ofnode_by_prop_value(mem, "device_type", "memory", 7);
} while (ofnode_valid(mem) && !ofnode_is_available(mem));
return mem;
}
int fdtdec_setup_memory_banksize(void)
{
int bank, reg = 0;
struct resource res;
ofnode mem;
mem = get_next_memory_node(ofnode_null());
if (!ofnode_valid(mem))
goto missing_node;
for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
while (ofnode_read_resource(mem, reg++, &res)) {
reg = 0;
mem = get_next_memory_node(mem);
if (!ofnode_valid(mem)) {
if (bank)
return 0;
goto missing_node;
}
}
gd->bd->bi_dram[bank].start = (phys_addr_t)res.start;
gd->bd->bi_dram[bank].size =
(phys_size_t)(res.end - res.start + 1);
debug("%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx\n",
__func__, bank,
(unsigned long long)gd->bd->bi_dram[bank].start,
(unsigned long long)gd->bd->bi_dram[bank].size);
}
return 0;
missing_node:
debug("%s: Missing /memory node\n", __func__);
return -EINVAL;
}
#endif
#if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
# if CONFIG_IS_ENABLED(MULTI_DTB_FIT_GZIP) ||\
CONFIG_IS_ENABLED(MULTI_DTB_FIT_LZO)
static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
{
size_t sz_out = CONFIG_SPL_MULTI_DTB_FIT_UNCOMPRESS_SZ;
ulong sz_in = sz_src;
void *dst;
int rc;
if (CONFIG_IS_ENABLED(GZIP))
if (gzip_parse_header(src, sz_in) < 0)
return -1;
if (CONFIG_IS_ENABLED(LZO))
if (!lzop_is_valid_header(src))
return -EBADMSG;
if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC)) {
dst = malloc(sz_out);
if (!dst) {
puts("uncompress_blob: Unable to allocate memory\n");
return -ENOMEM;
}
} else {
# if CONFIG_IS_ENABLED(MULTI_DTB_FIT_USER_DEFINED_AREA)
dst = (void *)CONFIG_VAL(MULTI_DTB_FIT_USER_DEF_ADDR);
# else
return -ENOTSUPP;
# endif
}
if (CONFIG_IS_ENABLED(GZIP))
rc = gunzip(dst, sz_out, (u8 *)src, &sz_in);
else if (CONFIG_IS_ENABLED(LZO))
rc = lzop_decompress(src, sz_in, dst, &sz_out);
if (rc < 0) {
/* not a valid compressed blob */
puts("uncompress_blob: Unable to uncompress\n");
if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC))
free(dst);
return -EBADMSG;
}
*dstp = dst;
return 0;
}
# else
static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
{
return -ENOTSUPP;
}
# endif
#endif
#if defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
/*
* For CONFIG_OF_SEPARATE, the board may optionally implement this to
* provide and/or fixup the fdt.
*/
__weak void *board_fdt_blob_setup(void)
{
void *fdt_blob = NULL;
#ifdef CONFIG_SPL_BUILD
/* FDT is at end of BSS unless it is in a different memory region */
if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
fdt_blob = (ulong *)&_image_binary_end;
else
fdt_blob = (ulong *)&__bss_end;
#else
/* FDT is at end of image */
fdt_blob = (ulong *)&_end;
#endif
return fdt_blob;
}
#endif
int fdtdec_setup(void)
{
#if CONFIG_IS_ENABLED(OF_CONTROL)
# if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
void *fdt_blob;
# endif
# ifdef CONFIG_OF_EMBED
/* Get a pointer to the FDT */
# ifdef CONFIG_SPL_BUILD
gd->fdt_blob = __dtb_dt_spl_begin;
# else
gd->fdt_blob = __dtb_dt_begin;
# endif
# elif defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
/* Allow the board to override the fdt address. */
gd->fdt_blob = board_fdt_blob_setup();
# elif defined(CONFIG_OF_HOSTFILE)
if (sandbox_read_fdt_from_file()) {
puts("Failed to read control FDT\n");
return -1;
}
# endif
# ifndef CONFIG_SPL_BUILD
/* Allow the early environment to override the fdt address */
# if CONFIG_IS_ENABLED(OF_PRIOR_STAGE)
gd->fdt_blob = (void *)prior_stage_fdt_address;
# else
gd->fdt_blob = (void *)env_get_ulong("fdtcontroladdr", 16,
(uintptr_t)gd->fdt_blob);
# endif
# endif
# if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
/*
* Try and uncompress the blob.
* Unfortunately there is no way to know how big the input blob really
* is. So let us set the maximum input size arbitrarily high. 16MB
* ought to be more than enough for packed DTBs.
*/
if (uncompress_blob(gd->fdt_blob, 0x1000000, &fdt_blob) == 0)
gd->fdt_blob = fdt_blob;
/*
* Check if blob is a FIT images containings DTBs.
* If so, pick the most relevant
*/
fdt_blob = locate_dtb_in_fit(gd->fdt_blob);
if (fdt_blob)
gd->fdt_blob = fdt_blob;
# endif
#endif
return fdtdec_prepare_fdt();
}
#ifdef CONFIG_NR_DRAM_BANKS
int fdtdec_decode_ram_size(const void *blob, const char *area, int board_id,
phys_addr_t *basep, phys_size_t *sizep, bd_t *bd)
{
int addr_cells, size_cells;
const u32 *cell, *end;
u64 total_size, size, addr;
int node, child;
bool auto_size;
int bank;
int len;
debug("%s: board_id=%d\n", __func__, board_id);
if (!area)
area = "/memory";
node = fdt_path_offset(blob, area);
if (node < 0) {
debug("No %s node found\n", area);
return -ENOENT;
}
cell = fdt_getprop(blob, node, "reg", &len);
if (!cell) {
debug("No reg property found\n");
return -ENOENT;
}
addr_cells = fdt_address_cells(blob, node);
size_cells = fdt_size_cells(blob, node);
/* Check the board id and mask */
for (child = fdt_first_subnode(blob, node);
child >= 0;
child = fdt_next_subnode(blob, child)) {
int match_mask, match_value;
match_mask = fdtdec_get_int(blob, child, "match-mask", -1);
match_value = fdtdec_get_int(blob, child, "match-value", -1);
if (match_value >= 0 &&
((board_id & match_mask) == match_value)) {
/* Found matching mask */
debug("Found matching mask %d\n", match_mask);
node = child;
cell = fdt_getprop(blob, node, "reg", &len);
if (!cell) {
debug("No memory-banks property found\n");
return -EINVAL;
}
break;
}
}
/* Note: if no matching subnode was found we use the parent node */
if (bd) {
memset(bd->bi_dram, '\0', sizeof(bd->bi_dram[0]) *
CONFIG_NR_DRAM_BANKS);
}
auto_size = fdtdec_get_bool(blob, node, "auto-size");
total_size = 0;
end = cell + len / 4 - addr_cells - size_cells;
debug("cell at %p, end %p\n", cell, end);
for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
if (cell > end)
break;
addr = 0;
if (addr_cells == 2)
addr += (u64)fdt32_to_cpu(*cell++) << 32UL;
addr += fdt32_to_cpu(*cell++);
if (bd)
bd->bi_dram[bank].start = addr;
if (basep && !bank)
*basep = (phys_addr_t)addr;
size = 0;
if (size_cells == 2)
size += (u64)fdt32_to_cpu(*cell++) << 32UL;
size += fdt32_to_cpu(*cell++);
if (auto_size) {
u64 new_size;
debug("Auto-sizing %llx, size %llx: ", addr, size);
new_size = get_ram_size((long *)(uintptr_t)addr, size);
if (new_size == size) {
debug("OK\n");
} else {
debug("sized to %llx\n", new_size);
size = new_size;
}
}
if (bd)
bd->bi_dram[bank].size = size;
total_size += size;
}
debug("Memory size %llu\n", total_size);
if (sizep)
*sizep = (phys_size_t)total_size;
return 0;
}
#endif /* CONFIG_NR_DRAM_BANKS */
#endif /* !USE_HOSTCC */