1 /* 2 * Copyright (C) 2013 Google, Inc 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <dm.h> 9 #include <fdtdec.h> 10 #include <spi.h> 11 #include <spi_flash.h> 12 #include <asm/state.h> 13 #include <dm/device-internal.h> 14 #include <dm/test.h> 15 #include <dm/uclass-internal.h> 16 #include <dm/util.h> 17 #include <test/ut.h> 18 19 /* Test that we can find buses and chip-selects */ 20 static int dm_test_spi_find(struct unit_test_state *uts) 21 { 22 struct sandbox_state *state = state_get_current(); 23 struct spi_slave *slave; 24 struct udevice *bus, *dev; 25 const int busnum = 0, cs = 0, mode = 0, speed = 1000000, cs_b = 1; 26 struct spi_cs_info info; 27 int of_offset; 28 29 ut_asserteq(-ENODEV, uclass_find_device_by_seq(UCLASS_SPI, busnum, 30 false, &bus)); 31 32 /* 33 * The post_bind() method will bind devices to chip selects. Check 34 * this then remove the emulation and the slave device. 35 */ 36 ut_asserteq(0, uclass_get_device_by_seq(UCLASS_SPI, busnum, &bus)); 37 ut_assertok(spi_cs_info(bus, cs, &info)); 38 of_offset = dev_of_offset(info.dev); 39 device_remove(info.dev, DM_REMOVE_NORMAL); 40 device_unbind(info.dev); 41 42 /* 43 * Even though the device is gone, the sandbox SPI drivers always 44 * reports that CS 0 is present 45 */ 46 ut_assertok(spi_cs_info(bus, cs, &info)); 47 ut_asserteq_ptr(NULL, info.dev); 48 49 /* This finds nothing because we removed the device */ 50 ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev)); 51 ut_asserteq(-ENODEV, spi_get_bus_and_cs(busnum, cs, speed, mode, 52 NULL, 0, &bus, &slave)); 53 54 /* 55 * This forces the device to be re-added, but there is no emulation 56 * connected so the probe will fail. We require that bus is left 57 * alone on failure, and that the spi_get_bus_and_cs() does not add 58 * a 'partially-inited' device. 59 */ 60 ut_asserteq(-ENODEV, spi_find_bus_and_cs(busnum, cs, &bus, &dev)); 61 ut_asserteq(-ENOENT, spi_get_bus_and_cs(busnum, cs, speed, mode, 62 "spi_flash_std", "name", &bus, 63 &slave)); 64 sandbox_sf_unbind_emul(state_get_current(), busnum, cs); 65 ut_assertok(spi_cs_info(bus, cs, &info)); 66 ut_asserteq_ptr(NULL, info.dev); 67 68 /* Add the emulation and try again */ 69 ut_assertok(sandbox_sf_bind_emul(state, busnum, cs, bus, of_offset, 70 "name")); 71 ut_assertok(spi_find_bus_and_cs(busnum, cs, &bus, &dev)); 72 ut_assertok(spi_get_bus_and_cs(busnum, cs, speed, mode, 73 "spi_flash_std", "name", &bus, &slave)); 74 75 ut_assertok(spi_cs_info(bus, cs, &info)); 76 ut_asserteq_ptr(info.dev, slave->dev); 77 78 /* We should be able to add something to another chip select */ 79 ut_assertok(sandbox_sf_bind_emul(state, busnum, cs_b, bus, of_offset, 80 "name")); 81 ut_assertok(spi_get_bus_and_cs(busnum, cs_b, speed, mode, 82 "spi_flash_std", "name", &bus, &slave)); 83 ut_assertok(spi_cs_info(bus, cs_b, &info)); 84 ut_asserteq_ptr(info.dev, slave->dev); 85 86 /* 87 * Since we are about to destroy all devices, we must tell sandbox 88 * to forget the emulation device 89 */ 90 sandbox_sf_unbind_emul(state_get_current(), busnum, cs); 91 sandbox_sf_unbind_emul(state_get_current(), busnum, cs_b); 92 93 return 0; 94 } 95 DM_TEST(dm_test_spi_find, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); 96 97 /* Test that sandbox SPI works correctly */ 98 static int dm_test_spi_xfer(struct unit_test_state *uts) 99 { 100 struct spi_slave *slave; 101 struct udevice *bus; 102 const int busnum = 0, cs = 0, mode = 0; 103 const char dout[5] = {0x9f}; 104 unsigned char din[5]; 105 106 ut_assertok(spi_get_bus_and_cs(busnum, cs, 1000000, mode, NULL, 0, 107 &bus, &slave)); 108 ut_assertok(spi_claim_bus(slave)); 109 ut_assertok(spi_xfer(slave, 40, dout, din, 110 SPI_XFER_BEGIN | SPI_XFER_END)); 111 ut_asserteq(0xff, din[0]); 112 ut_asserteq(0x20, din[1]); 113 ut_asserteq(0x20, din[2]); 114 ut_asserteq(0x15, din[3]); 115 spi_release_bus(slave); 116 117 /* 118 * Since we are about to destroy all devices, we must tell sandbox 119 * to forget the emulation device 120 */ 121 #ifdef CONFIG_DM_SPI_FLASH 122 sandbox_sf_unbind_emul(state_get_current(), busnum, cs); 123 #endif 124 125 return 0; 126 } 127 DM_TEST(dm_test_spi_xfer, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT); 128