LXR uboot/drivers/axi/axi-emul-uclass.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2018
   4 * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
   5 */
   6
   7#include <common.h>
   8#include <axi.h>
   9#include <dm.h>
  10#include <dm/device-internal.h>
  11#include <asm/axi.h>
  12
  13int axi_sandbox_get_emul(struct udevice *bus, ulong address,
  14                         enum axi_size_t size, struct udevice **emulp)
  15{
  16        struct udevice *dev;
  17        u32 reg[2];
  18        uint offset;
  19
  20        switch (size) {
  21        case AXI_SIZE_8:
  22                offset = 1;
  23                break;
  24        case AXI_SIZE_16:
  25                offset = 2;
  26                break;
  27        case AXI_SIZE_32:
  28                offset = 4;
  29                break;
  30        default:
  31                debug("%s: Unknown AXI transfer size '%d'", bus->name, size);
  32                offset = 0;
  33        }
  34
  35        /*
  36         * Note: device_find_* don't activate the devices; they're activated
  37         *       as-needed below.
  38         */
  39        for (device_find_first_child(bus, &dev);
  40             dev;
  41             device_find_next_child(&dev)) {
  42                int ret;
  43
  44                ret = dev_read_u32_array(dev, "reg", reg, ARRAY_SIZE(reg));
  45                if (ret) {
  46                        debug("%s: Could not read 'reg' property of %s\n",
  47                              bus->name, dev->name);
  48                        continue;
  49                }
  50
  51                /*
  52                 * Does the transfer's address fall into this device's address
  53                 * space?
  54                 */
  55                if (address >= reg[0] && address <= reg[0] + reg[1] - offset) {
  56                        /* If yes, activate it... */
  57                        if (device_probe(dev)) {
  58                                debug("%s: Could not activate %s\n",
  59                                      bus->name, dev->name);
  60                                return -ENODEV;
  61                        }
  62
  63                        /* ...and return it */
  64                        *emulp = dev;
  65                        return 0;
  66                }
  67        }
  68
  69        return -ENODEV;
  70}
  71
  72int axi_get_store(struct udevice *dev, u8 **storep)
  73{
  74        struct axi_emul_ops *ops = axi_emul_get_ops(dev);
  75
  76        if (!ops->get_store)
  77                return -ENOSYS;
  78
  79        return ops->get_store(dev, storep);
  80}
  81
  82UCLASS_DRIVER(axi_emul) = {
  83        .id             = UCLASS_AXI_EMUL,
  84        .name           = "axi_emul",
  85};
  86