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 scmi node. Protocol 0x10 is not
   9  * implemented in U-Boot SCMI components but the implementation is expected
  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 <power/regulator.h>
  24 #include <test/ut.h>
  25
  26 static int ut_assert_scmi_state_preprobe(struct unit_test_state *uts)
  27 {
  28         struct sandbox_scmi_service *scmi_ctx = sandbox_scmi_service_ctx();
  29
  30         ut_assertnonnull(scmi_ctx);
  31         ut_assertnull(scmi_ctx->agent);
  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         struct sandbox_scmi_agent *agent;
  42
  43         /* Device references to check context against test sequence */
  44         scmi_devices = sandbox_scmi_devices_ctx(dev);
  45         ut_assertnonnull(scmi_devices);
  46         ut_asserteq(2, scmi_devices->clk_count);
  47         ut_asserteq(1, scmi_devices->reset_count);
  48         ut_asserteq(2, scmi_devices->regul_count);
  49
  50         /* State of the simulated SCMI server exposed */
  51         scmi_ctx = sandbox_scmi_service_ctx();
  52         ut_assertnonnull(scmi_ctx);
  53         agent = scmi_ctx->agent;
  54         ut_assertnonnull(agent);
  55         ut_asserteq(3, agent->clk_count);
  56         ut_assertnonnull(agent->clk);
  57         ut_asserteq(1, agent->reset_count);
  58         ut_assertnonnull(agent->reset);
  59         ut_asserteq(2, agent->voltd_count);
  60         ut_assertnonnull(agent->voltd);
  61
  62         return 0;
  63 }
  64
  65 static int load_sandbox_scmi_test_devices(struct unit_test_state *uts,
  66                                           struct udevice **dev)
  67 {
  68         int ret;
  69
  70         ret = ut_assert_scmi_state_preprobe(uts);
  71         if (ret)
  72                 return ret;
  73
  74         ut_assertok(uclass_get_device_by_name(UCLASS_MISC, "sandbox_scmi",
  75                                               dev));
  76         ut_assertnonnull(*dev);
  77
  78         return ut_assert_scmi_state_postprobe(uts, *dev);
  79 }
  80
  81 static int release_sandbox_scmi_test_devices(struct unit_test_state *uts,
  82                                              struct udevice *dev)
  83 {
  84         ut_assertok(device_remove(dev, DM_REMOVE_NORMAL));
  85
  86         /* Not sure test devices are fully removed, agent may not be visible */
  87         return 0;
  88 }
  89
  90 /*
  91  * Test SCMI states when loading and releasing resources
  92  * related to SCMI drivers.
  93  */
  94 static int dm_test_scmi_sandbox_agent(struct unit_test_state *uts)
  95 {
  96         struct udevice *dev = NULL;
  97         int ret;
  98
  99         ret = load_sandbox_scmi_test_devices(uts, &dev);
 100         if (!ret)
 101                 ret = release_sandbox_scmi_test_devices(uts, dev);
 102
 103         return ret;
 104 }
 105 DM_TEST(dm_test_scmi_sandbox_agent, UT_TESTF_SCAN_FDT);
 106
 107 static int dm_test_scmi_clocks(struct unit_test_state *uts)
 108 {
 109         struct sandbox_scmi_devices *scmi_devices;
 110         struct sandbox_scmi_service *scmi_ctx;
 111         struct sandbox_scmi_agent *agent;
 112         struct udevice *dev;
 113         int ret_dev;
 114         int ret;
 115
 116         ret = load_sandbox_scmi_test_devices(uts, &dev);
 117         if (ret)
 118                 return ret;
 119
 120         scmi_devices = sandbox_scmi_devices_ctx(dev);
 121         ut_assertnonnull(scmi_devices);
 122         scmi_ctx = sandbox_scmi_service_ctx();
 123         ut_assertnonnull(scmi_ctx);
 124         agent = scmi_ctx->agent;
 125         ut_assertnonnull(agent);
 126
 127         /* Test SCMI clocks rate manipulation */
 128         ut_asserteq(333, agent->clk[0].rate);
 129         ut_asserteq(200, agent->clk[1].rate);
 130         ut_asserteq(1000, agent->clk[2].rate);
 131
 132         ut_asserteq(1000, clk_get_rate(&scmi_devices->clk[0]));
 133         ut_asserteq(333, clk_get_rate(&scmi_devices->clk[1]));
 134
 135         ret_dev = clk_set_rate(&scmi_devices->clk[1], 1088);
 136         ut_assert(!ret_dev || ret_dev == 1088);
 137
 138         ut_asserteq(1088, agent->clk[0].rate);
 139         ut_asserteq(200, agent->clk[1].rate);
 140         ut_asserteq(1000, agent->clk[2].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
 145         /* restore original rate for further tests */
 146         ret_dev = clk_set_rate(&scmi_devices->clk[1], 333);
 147         ut_assert(!ret_dev || ret_dev == 333);
 148
 149         /* Test SCMI clocks gating manipulation */
 150         ut_assert(!agent->clk[0].enabled);
 151         ut_assert(!agent->clk[1].enabled);
 152         ut_assert(!agent->clk[2].enabled);
 153
 154         ut_asserteq(0, clk_enable(&scmi_devices->clk[1]));
 155
 156         ut_assert(agent->clk[0].enabled);
 157         ut_assert(!agent->clk[1].enabled);
 158         ut_assert(!agent->clk[2].enabled);
 159
 160         ut_assertok(clk_disable(&scmi_devices->clk[1]));
 161
 162         ut_assert(!agent->clk[0].enabled);
 163         ut_assert(!agent->clk[1].enabled);
 164         ut_assert(!agent->clk[2].enabled);
 165
 166         return release_sandbox_scmi_test_devices(uts, dev);
 167 }
 168 DM_TEST(dm_test_scmi_clocks, UT_TESTF_SCAN_FDT);
 169
 170 static int dm_test_scmi_resets(struct unit_test_state *uts)
 171 {
 172         struct sandbox_scmi_devices *scmi_devices;
 173         struct sandbox_scmi_service *scmi_ctx;
 174         struct sandbox_scmi_agent *agent;
 175         struct udevice *dev = NULL;
 176         int ret;
 177
 178         ret = load_sandbox_scmi_test_devices(uts, &dev);
 179         if (ret)
 180                 return ret;
 181
 182         scmi_devices = sandbox_scmi_devices_ctx(dev);
 183         ut_assertnonnull(scmi_devices);
 184         scmi_ctx = sandbox_scmi_service_ctx();
 185         ut_assertnonnull(scmi_ctx);
 186         agent = scmi_ctx->agent;
 187         ut_assertnonnull(agent);
 188
 189         /* Test SCMI resect controller manipulation */
 190         ut_assert(!agent->reset[0].asserted)
 191
 192         ut_assertok(reset_assert(&scmi_devices->reset[0]));
 193         ut_assert(agent->reset[0].asserted)
 194
 195         ut_assertok(reset_deassert(&scmi_devices->reset[0]));
 196         ut_assert(!agent->reset[0].asserted);
 197
 198         return release_sandbox_scmi_test_devices(uts, dev);
 199 }
 200 DM_TEST(dm_test_scmi_resets, UT_TESTF_SCAN_FDT);
 201
 202 static int dm_test_scmi_voltage_domains(struct unit_test_state *uts)
 203 {
 204         struct sandbox_scmi_devices *scmi_devices;
 205         struct sandbox_scmi_service *scmi_ctx;
 206         struct sandbox_scmi_agent *agent;
 207         struct dm_regulator_uclass_plat *uc_pdata;
 208         struct udevice *dev;
 209         struct udevice *regul0_dev;
 210
 211         ut_assertok(load_sandbox_scmi_test_devices(uts, &dev));
 212
 213         scmi_devices = sandbox_scmi_devices_ctx(dev);
 214         ut_assertnonnull(scmi_devices);
 215         scmi_ctx = sandbox_scmi_service_ctx();
 216         ut_assertnonnull(scmi_ctx);
 217         agent = scmi_ctx->agent;
 218         ut_assertnonnull(agent);
 219
 220         /* Set/Get an SCMI voltage domain level */
 221         regul0_dev = scmi_devices->regul[0];
 222         ut_assert(regul0_dev);
 223
 224         uc_pdata = dev_get_uclass_plat(regul0_dev);
 225         ut_assert(uc_pdata);
 226
 227         ut_assertok(regulator_set_value(regul0_dev, uc_pdata->min_uV));
 228         ut_asserteq(agent->voltd[0].voltage_uv, uc_pdata->min_uV);
 229
 230         ut_assert(regulator_get_value(regul0_dev) == uc_pdata->min_uV);
 231
 232         ut_assertok(regulator_set_value(regul0_dev, uc_pdata->max_uV));
 233         ut_asserteq(agent->voltd[0].voltage_uv, uc_pdata->max_uV);
 234
 235         ut_assert(regulator_get_value(regul0_dev) == uc_pdata->max_uV);
 236
 237         /* Enable/disable SCMI voltage domains */
 238         ut_assertok(regulator_set_enable(scmi_devices->regul[0], false));
 239         ut_assertok(regulator_set_enable(scmi_devices->regul[1], false));
 240         ut_assert(!agent->voltd[0].enabled);
 241         ut_assert(!agent->voltd[1].enabled);
 242
 243         ut_assertok(regulator_set_enable(scmi_devices->regul[0], true));
 244         ut_assert(agent->voltd[0].enabled);
 245         ut_assert(!agent->voltd[1].enabled);
 246
 247         ut_assertok(regulator_set_enable(scmi_devices->regul[1], true));
 248         ut_assert(agent->voltd[0].enabled);
 249         ut_assert(agent->voltd[1].enabled);
 250
 251         ut_assertok(regulator_set_enable(scmi_devices->regul[0], false));
 252         ut_assert(!agent->voltd[0].enabled);
 253         ut_assert(agent->voltd[1].enabled);
 254
 255         return release_sandbox_scmi_test_devices(uts, dev);
 256 }
 257 DM_TEST(dm_test_scmi_voltage_domains, UT_TESTF_SCAN_FDT);