acpi: Support generating a multi-function _DSM for devices
Add a function to generate ACPI code for a _DSM method for a device.
This includes functions for starting and ending each part of the _DSM.
Signed-off-by: Simon Glass <sjg@chromium.org>
[bmeng: fix the "new blank line at EOF" git warning]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/test/dm/acpigen.c b/test/dm/acpigen.c
index cce19f1..62d48dc 100644
--- a/test/dm/acpigen.c
+++ b/test/dm/acpigen.c
@@ -10,6 +10,7 @@
#include <dm.h>
#include <irq.h>
#include <malloc.h>
+#include <uuid.h>
#include <acpi/acpigen.h>
#include <acpi/acpi_device.h>
#include <acpi/acpi_table.h>
@@ -1218,3 +1219,127 @@
return 0;
}
DM_TEST(dm_test_acpi_write_return, 0);
+
+/* Test emitting a DSM for an I2C HID */
+static int dm_test_acpi_write_i2c_dsm(struct unit_test_state *uts)
+{
+ char uuid_str[UUID_STR_LEN + 1];
+ const int reg_offset = 0x20;
+ struct acpi_ctx *ctx;
+ u8 *ptr;
+
+ ut_assertok(alloc_context(&ctx));
+
+ ptr = acpigen_get_current(ctx);
+ ut_assertok(acpi_device_write_dsm_i2c_hid(ctx, reg_offset));
+
+ /* acpigen_write_dsm_start() */
+ ut_asserteq(METHOD_OP, *ptr++);
+ ut_asserteq(0x78, acpi_test_get_length(ptr));
+ ptr += 3;
+ ut_asserteq_strn("_DSM", (char *)ptr);
+ ptr += 4;
+ ut_asserteq(ACPI_METHOD_SERIALIZED_MASK | 4, *ptr++);
+
+ ut_asserteq(TO_BUFFER_OP, *ptr++);
+ ut_asserteq(ARG0_OP, *ptr++);
+ ut_asserteq(LOCAL0_OP, *ptr++);
+
+ /* acpigen_write_dsm_uuid_start() */
+ ut_asserteq(IF_OP, *ptr++);
+ ut_asserteq(0x65, acpi_test_get_length(ptr));
+ ptr += 3;
+ ut_asserteq(LEQUAL_OP, *ptr++);
+ ut_asserteq(LOCAL0_OP, *ptr++);
+
+ ut_asserteq(BUFFER_OP, *ptr++);
+ ut_asserteq(UUID_BIN_LEN + 6, acpi_test_get_length(ptr));
+ ptr += 3;
+ ut_asserteq(WORD_PREFIX, *ptr++);
+ ut_asserteq(UUID_BIN_LEN, get_unaligned((u16 *)ptr));
+ ptr += 2;
+ uuid_bin_to_str(ptr, uuid_str, UUID_STR_FORMAT_GUID);
+ ut_asserteq_str(ACPI_DSM_I2C_HID_UUID, uuid_str);
+ ptr += UUID_BIN_LEN;
+
+ ut_asserteq(TO_INTEGER_OP, *ptr++);
+ ut_asserteq(ARG2_OP, *ptr++);
+ ut_asserteq(LOCAL1_OP, *ptr++);
+
+ /* acpigen_write_dsm_uuid_start_cond() */
+ ut_asserteq(IF_OP, *ptr++);
+ ut_asserteq(0x34, acpi_test_get_length(ptr));
+ ptr += 3;
+ ut_asserteq(LEQUAL_OP, *ptr++);
+ ut_asserteq(LOCAL1_OP, *ptr++);
+ ut_asserteq(ZERO_OP, *ptr++);
+
+ /*
+ * See code from acpi_device_write_dsm_i2c_hid(). We don't check every
+ * piece
+ */
+ ut_asserteq(TO_INTEGER_OP, *ptr++);
+ ut_asserteq(ARG1_OP, *ptr++);
+ ut_asserteq(LOCAL2_OP, *ptr++);
+
+ ut_asserteq(IF_OP, *ptr++);
+ ut_asserteq(0xd, acpi_test_get_length(ptr));
+ ptr += 3;
+ ut_asserteq(LEQUAL_OP, *ptr++);
+ ut_asserteq(LOCAL2_OP, *ptr++);
+ ut_asserteq(ZERO_OP, *ptr++); /* function 0 */
+
+ ut_asserteq(RETURN_OP, *ptr++);
+ ut_asserteq(BUFFER_OP, *ptr++);
+ ptr += 5;
+
+ ut_asserteq(ELSE_OP, *ptr++);
+ ptr += 3;
+
+ ut_asserteq(IF_OP, *ptr++);
+ ut_asserteq(0xd, acpi_test_get_length(ptr));
+ ptr += 3;
+ ut_asserteq(LEQUAL_OP, *ptr++);
+ ut_asserteq(LOCAL2_OP, *ptr++);
+ ut_asserteq(ONE_OP, *ptr++);
+
+ ut_asserteq(RETURN_OP, *ptr++);
+ ut_asserteq(BUFFER_OP, *ptr++);
+ ptr += 5;
+
+ ut_asserteq(ELSE_OP, *ptr++);
+ ptr += 3;
+
+ ut_asserteq(RETURN_OP, *ptr++);
+ ut_asserteq(BUFFER_OP, *ptr++);
+ ptr += 5;
+
+ /* acpigen_write_dsm_uuid_start_cond() */
+ ut_asserteq(IF_OP, *ptr++);
+ ut_asserteq(9, acpi_test_get_length(ptr));
+ ptr += 3;
+ ut_asserteq(LEQUAL_OP, *ptr++);
+ ut_asserteq(LOCAL1_OP, *ptr++);
+ ut_asserteq(ONE_OP, *ptr++); /* function 1 */
+
+ ut_asserteq(RETURN_OP, *ptr++);
+ ut_asserteq(BYTE_PREFIX, *ptr++);
+ ut_asserteq(reg_offset, *ptr++);
+
+ /* acpigen_write_dsm_uuid_end() */
+ ut_asserteq(RETURN_OP, *ptr++);
+ ut_asserteq(BUFFER_OP, *ptr++);
+ ptr += 5;
+
+ /* acpigen_write_dsm_end */
+ ut_asserteq(RETURN_OP, *ptr++);
+ ut_asserteq(BUFFER_OP, *ptr++);
+ ptr += 5;
+
+ ut_asserteq_ptr(ptr, ctx->current);
+
+ free_context(&ctx);
+
+ return 0;
+}
+DM_TEST(dm_test_acpi_write_i2c_dsm, 0);