1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2013 Google, Inc 4 */ 5 6 #include <common.h> 7 #include <dm.h> 8 #include <fdtdec.h> 9 #include <spi.h> 10 #include <spi_flash.h> 11 #include <asm/state.h> 12 #include <dm/device-internal.h> 13 #include <dm/test.h> 14 #include <dm/uclass-internal.h> 15 #include <dm/util.h> 16 #include <test/ut.h> 17 18 /* Test that we can find buses and chip-selects */ 19 static int dm_test_spi_find(struct unit_test_state *uts) 20 { 21 struct sandbox_state *state = state_get_current(); 22 struct spi_slave *slave; 23 struct udevice *bus, *dev; 24 const int busnum = 0, cs = 0, mode = 0, speed = 1000000, cs_b = 1; 25 struct spi_cs_info info; 26 int of_offset; 27 28 ut_asserteq(-ENODEV, uclass_find_device_by_seq(UCLASS_SPI, busnum, 29 false, &bus)); 30 31 /* 32 * The post_bind() method will bind devices to chip selects. Check 33 * this then remove the emulation and the slave device. 34 */ 35 ut_asserteq(0, uclass_get_device_by_seq(UCLASS_SPI, busnum, &bus)); 36 ut_assertok(spi_cs_info(bus, cs, &info)); 37 of_offset = dev_of_offset(info.dev); 38 device_remove(info.dev, DM_REMOVE_NORMAL); 39 device_unbind(info.dev); 40 41 /* 42 * Even though the device is gone, the sandbox SPI drivers always 43 * reports that CS 0 is present 44 */ 45 ut_assertok(spi_cs_info(bus, cs, &info)); 46 ut_asserteq_ptr(NULL, info.dev); 47 48 /* This finds nothing because we removed the device */ 49 ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev)); 50 ut_asserteq(-ENODEV, spi_get_bus_and_cs(busnum, cs, speed, mode, 51 NULL, 0, &bus, &slave)); 52 53 /* 54 * This forces the device to be re-added, but there is no emulation 55 * connected so the probe will fail. We require that bus is left 56 * alone on failure, and that the spi_get_bus_and_cs() does not add 57 * a 'partially-inited' device. 58 */ 59 ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev)); 60 ut_asserteq(-ENOENT, spi_get_bus_and_cs(busnum, cs, speed, mode, 61 "spi_flash_std", "name", &bus, 62 &slave)); 63 sandbox_sf_unbind_emul(state_get_current(), busnum, cs); 64 ut_assertok(spi_cs_info(bus, cs, &info)); 65 ut_asserteq_ptr(NULL, info.dev); 66 67 /* Add the emulation and try again */ 68 ut_assertok(sandbox_sf_bind_emul(state, busnum, cs, bus, of_offset, 69 "name")); 70 ut_assertok(spi_find_bus_and_cs(busnum, cs, &bus, &dev)); 71 ut_assertok(spi_get_bus_and_cs(busnum, cs, speed, mode, 72 "spi_flash_std", "name", &bus, &slave)); 73 74 ut_assertok(spi_cs_info(bus, cs, &info)); 75 ut_asserteq_ptr(info.dev, slave->dev); 76 77 /* We should be able to add something to another chip select */ 78 ut_assertok(sandbox_sf_bind_emul(state, busnum, cs_b, bus, of_offset, 79 "name")); 80 ut_assertok(spi_get_bus_and_cs(busnum, cs_b, speed, mode, 81 "spi_flash_std", "name", &bus, &slave)); 82 ut_assertok(spi_cs_info(bus, cs_b, &info)); 83 ut_asserteq_ptr(info.dev, slave->dev); 84 85 /* 86 * Since we are about to destroy all devices, we must tell sandbox 87 * to forget the emulation device 88 */ 89 sandbox_sf_unbind_emul(state_get_current(), busnum, cs); 90 sandbox_sf_unbind_emul(state_get_current(), busnum, cs_b); 91 92 return 0; 93 } 94 DM_TEST(dm_test_spi_find, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); 95 96 /* Test that sandbox SPI works correctly */ 97 static int dm_test_spi_xfer(struct unit_test_state *uts) 98 { 99 struct spi_slave *slave; 100 struct udevice *bus; 101 const int busnum = 0, cs = 0, mode = 0; 102 const char dout[5] = {0x9f}; 103 unsigned char din[5]; 104 105 ut_assertok(spi_get_bus_and_cs(busnum, cs, 1000000, mode, NULL, 0, 106 &bus, &slave)); 107 ut_assertok(spi_claim_bus(slave)); 108 ut_assertok(spi_xfer(slave, 40, dout, din, 109 SPI_XFER_BEGIN | SPI_XFER_END)); 110 ut_asserteq(0xff, din[0]); 111 ut_asserteq(0x20, din[1]); 112 ut_asserteq(0x20, din[2]); 113 ut_asserteq(0x15, din[3]); 114 spi_release_bus(slave); 115 116 /* 117 * Since we are about to destroy all devices, we must tell sandbox 118 * to forget the emulation device 119 */ 120 #ifdef CONFIG_DM_SPI_FLASH 121 sandbox_sf_unbind_emul(state_get_current(), busnum, cs); 122 #endif 123 124 return 0; 125 } 126 DM_TEST(dm_test_spi_xfer, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); 127