test/dm/scmi.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2020, Linaro Limited
   4  *
   5  * Tests scmi_agent uclass and the SCMI drivers implemented in other
   6  * uclass devices probe when a SCMI server exposes resources.
   7  *
   8  * Note in test.dts the protocol@10 node in agent 1. Protocol 0x10 is not
   9  * implemented in U-Boot SCMI components but the implementation is exepected
  10  * to not complain on unknown protocol IDs, as long as it is not used. Note
  11  * in test.dts tests that SCMI drivers probing does not fail for such an
  12  * unknown SCMI protocol ID.
  13  */
  14
  15 #include <common.h>
  16 #include <clk.h>
  17 #include <dm.h>
  18 #include <reset.h>
  19 #include <asm/scmi_test.h>
  20 #include <dm/device-internal.h>
  21 #include <dm/test.h>
  22 #include <linux/kconfig.h>
  23 #include <test/ut.h>
  24
  25 static int ut_assert_scmi_state_preprobe(struct unit_test_state *uts)
  26 {
  27         struct sandbox_scmi_service *scmi_ctx = sandbox_scmi_service_ctx();
  28
  29         ut_assertnonnull(scmi_ctx);
  30         if (scmi_ctx->agent_count)
  31                 ut_asserteq(2, scmi_ctx->agent_count);
  32
  33         return 0;
  34 }
  35
  36 static int ut_assert_scmi_state_postprobe(struct unit_test_state *uts,
  37                                           struct udevice *dev)
  38 {
  39         struct sandbox_scmi_devices *scmi_devices;
  40         struct sandbox_scmi_service *scmi_ctx;
  41
  42         /* Device references to check context against test sequence */
  43         scmi_devices = sandbox_scmi_devices_ctx(dev);
  44
  45         ut_assertnonnull(scmi_devices);
  46         if (IS_ENABLED(CONFIG_CLK_SCMI))
  47                 ut_asserteq(3, scmi_devices->clk_count);
  48         if (IS_ENABLED(CONFIG_RESET_SCMI))
  49                 ut_asserteq(1, scmi_devices->reset_count);
  50
  51         /* State of the simulated SCMI server exposed */
  52         scmi_ctx = sandbox_scmi_service_ctx();
  53
  54         ut_asserteq(2, scmi_ctx->agent_count);
  55
  56         ut_assertnonnull(scmi_ctx->agent[0]);
  57         ut_asserteq(2, scmi_ctx->agent[0]->clk_count);
  58         ut_assertnonnull(scmi_ctx->agent[0]->clk);
  59         ut_asserteq(1, scmi_ctx->agent[0]->reset_count);
  60         ut_assertnonnull(scmi_ctx->agent[0]->reset);
  61
  62         ut_assertnonnull(scmi_ctx->agent[1]);
  63         ut_assertnonnull(scmi_ctx->agent[1]->clk);
  64         ut_asserteq(1, scmi_ctx->agent[1]->clk_count);
  65
  66         return 0;
  67 }
  68
  69 static int load_sandbox_scmi_test_devices(struct unit_test_state *uts,
  70                                           struct udevice **dev)
  71 {
  72         int ret;
  73
  74         ret = ut_assert_scmi_state_preprobe(uts);
  75         if (ret)
  76                 return ret;
  77
  78         ut_assertok(uclass_get_device_by_name(UCLASS_MISC, "sandbox_scmi",
  79                                               dev));
  80         ut_assertnonnull(*dev);
  81
  82         return ut_assert_scmi_state_postprobe(uts, *dev);
  83 }
  84
  85 static int release_sandbox_scmi_test_devices(struct unit_test_state *uts,
  86                                              struct udevice *dev)
  87 {
  88         ut_assertok(device_remove(dev, DM_REMOVE_NORMAL));
  89
  90         /* Not sure test devices are fully removed, agent may not be visible */
  91         return 0;
  92 }
  93
  94 /*
  95  * Test SCMI states when loading and releasing resources
  96  * related to SCMI drivers.
  97  */
  98 static int dm_test_scmi_sandbox_agent(struct unit_test_state *uts)
  99 {
 100         struct udevice *dev = NULL;
 101         int ret;
 102
 103         ret = load_sandbox_scmi_test_devices(uts, &dev);
 104         if (!ret)
 105                 ret = release_sandbox_scmi_test_devices(uts, dev);
 106
 107         return ret;
 108 }
 109
 110 DM_TEST(dm_test_scmi_sandbox_agent, UT_TESTF_SCAN_FDT);
 111
 112 static int dm_test_scmi_clocks(struct unit_test_state *uts)
 113 {
 114         struct sandbox_scmi_devices *scmi_devices;
 115         struct sandbox_scmi_service *scmi_ctx;
 116         struct udevice *dev = NULL;
 117         int ret_dev;
 118         int ret;
 119
 120         if (!IS_ENABLED(CONFIG_CLK_SCMI))
 121                 return 0;
 122
 123         ret = load_sandbox_scmi_test_devices(uts, &dev);
 124         if (ret)
 125                 return ret;
 126
 127         scmi_devices = sandbox_scmi_devices_ctx(dev);
 128         scmi_ctx = sandbox_scmi_service_ctx();
 129
 130         /* Test SCMI clocks rate manipulation */
 131         ut_asserteq(1000, clk_get_rate(&scmi_devices->clk[0]));
 132         ut_asserteq(333, clk_get_rate(&scmi_devices->clk[1]));
 133         ut_asserteq(44, clk_get_rate(&scmi_devices->clk[2]));
 134
 135         ret_dev = clk_set_rate(&scmi_devices->clk[1], 1088);
 136         ut_assert(!ret_dev || ret_dev == 1088);
 137
 138         ut_asserteq(1000, scmi_ctx->agent[0]->clk[0].rate);
 139         ut_asserteq(1088, scmi_ctx->agent[0]->clk[1].rate);
 140         ut_asserteq(44, scmi_ctx->agent[1]->clk[0].rate);
 141
 142         ut_asserteq(1000, clk_get_rate(&scmi_devices->clk[0]));
 143         ut_asserteq(1088, clk_get_rate(&scmi_devices->clk[1]));
 144         ut_asserteq(44, clk_get_rate(&scmi_devices->clk[2]));
 145
 146         /* restore original rate for further tests */
 147         ret_dev = clk_set_rate(&scmi_devices->clk[1], 333);
 148         ut_assert(!ret_dev || ret_dev == 333);
 149
 150         /* Test SCMI clocks gating manipulation */
 151         ut_assert(!scmi_ctx->agent[0]->clk[0].enabled);
 152         ut_assert(!scmi_ctx->agent[0]->clk[1].enabled);
 153         ut_assert(!scmi_ctx->agent[1]->clk[0].enabled);
 154
 155         ut_asserteq(0, clk_enable(&scmi_devices->clk[1]));
 156         ut_asserteq(0, clk_enable(&scmi_devices->clk[2]));
 157
 158         ut_assert(!scmi_ctx->agent[0]->clk[0].enabled);
 159         ut_assert(scmi_ctx->agent[0]->clk[1].enabled);
 160         ut_assert(scmi_ctx->agent[1]->clk[0].enabled);
 161
 162         ut_assertok(clk_disable(&scmi_devices->clk[1]));
 163         ut_assertok(clk_disable(&scmi_devices->clk[2]));
 164
 165         ut_assert(!scmi_ctx->agent[0]->clk[0].enabled);
 166         ut_assert(!scmi_ctx->agent[0]->clk[1].enabled);
 167         ut_assert(!scmi_ctx->agent[1]->clk[0].enabled);
 168
 169         return release_sandbox_scmi_test_devices(uts, dev);
 170 }
 171
 172 DM_TEST(dm_test_scmi_clocks, UT_TESTF_SCAN_FDT);
 173
 174 static int dm_test_scmi_resets(struct unit_test_state *uts)
 175 {
 176         struct sandbox_scmi_devices *scmi_devices;
 177         struct sandbox_scmi_service *scmi_ctx;
 178         struct udevice *dev = NULL;
 179         int ret;
 180
 181         if (!IS_ENABLED(CONFIG_RESET_SCMI))
 182                 return 0;
 183
 184         ret = load_sandbox_scmi_test_devices(uts, &dev);
 185         if (ret)
 186                 return ret;
 187
 188         scmi_devices = sandbox_scmi_devices_ctx(dev);
 189         scmi_ctx = sandbox_scmi_service_ctx();
 190
 191         /* Test SCMI resect controller manipulation */
 192         ut_assert(!scmi_ctx->agent[0]->reset[0].asserted)
 193
 194         ut_assertok(reset_assert(&scmi_devices->reset[0]));
 195         ut_assert(scmi_ctx->agent[0]->reset[0].asserted)
 196
 197         ut_assertok(reset_deassert(&scmi_devices->reset[0]));
 198         ut_assert(!scmi_ctx->agent[0]->reset[0].asserted);
 199
 200         return release_sandbox_scmi_test_devices(uts, dev);
 201 }
 202
 203 DM_TEST(dm_test_scmi_resets, UT_TESTF_SCAN_FDT);