Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / post / drivers / i2c.c

diff --git a/qemu/roms/u-boot/post/drivers/i2c.c b/qemu/roms/u-boot/post/drivers/i2c.c
new file mode 100644 (file)
index 0000000..95da2eb
--- /dev/null
+++ b/qemu/roms/u-boot/post/drivers/i2c.c
@@ -0,0 +1,97 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+/*
+ * I2C test
+ *
+ * For verifying the I2C bus, a full I2C bus scanning is performed.
+ *
+ * #ifdef CONFIG_SYS_POST_I2C_ADDRS
+ *   The test is considered as passed if all the devices and only the devices
+ *   in the list are found.
+ *   #ifdef CONFIG_SYS_POST_I2C_IGNORES
+ *     Ignore devices listed in CONFIG_SYS_POST_I2C_IGNORES.  These devices
+ *     are optional or not vital to board functionality.
+ *   #endif
+ * #else [ ! CONFIG_SYS_POST_I2C_ADDRS ]
+ *   The test is considered as passed if any I2C device is found.
+ * #endif
+ */
+
+#include <common.h>
+#include <post.h>
+#include <i2c.h>
+
+#if CONFIG_POST & CONFIG_SYS_POST_I2C
+
+static int i2c_ignore_device(unsigned int chip)
+{
+#ifdef CONFIG_SYS_POST_I2C_IGNORES
+       const unsigned char i2c_ignore_list[] = CONFIG_SYS_POST_I2C_IGNORES;
+       int i;
+
+       for (i = 0; i < sizeof(i2c_ignore_list); i++)
+               if (i2c_ignore_list[i] == chip)
+                       return 1;
+#endif
+
+       return 0;
+}
+
+int i2c_post_test (int flags)
+{
+       unsigned int i;
+#ifndef CONFIG_SYS_POST_I2C_ADDRS
+       /* Start at address 1, address 0 is the general call address */
+       for (i = 1; i < 128; i++) {
+               if (i2c_ignore_device(i))
+                       continue;
+               if (i2c_probe (i) == 0)
+                       return 0;
+       }
+
+       /* No devices found */
+       return -1;
+#else
+       unsigned int ret  = 0;
+       int j;
+       unsigned char i2c_addr_list[] = CONFIG_SYS_POST_I2C_ADDRS;
+
+       /* Start at address 1, address 0 is the general call address */
+       for (i = 1; i < 128; i++) {
+               if (i2c_ignore_device(i))
+                       continue;
+               if (i2c_probe(i) != 0)
+                       continue;
+
+               for (j = 0; j < sizeof(i2c_addr_list); ++j) {
+                       if (i == i2c_addr_list[j]) {
+                               i2c_addr_list[j] = 0xff;
+                               break;
+                       }
+               }
+
+               if (j == sizeof(i2c_addr_list)) {
+                       ret = -1;
+                       post_log("I2C: addr %02x not expected\n", i);
+               }
+       }
+
+       for (i = 0; i < sizeof(i2c_addr_list); ++i) {
+               if (i2c_addr_list[i] == 0xff)
+                       continue;
+               if (i2c_ignore_device(i2c_addr_list[i]))
+                       continue;
+               post_log("I2C: addr %02x did not respond\n", i2c_addr_list[i]);
+               ret = -1;
+       }
+
+       return ret;
+#endif
+}
+
+#endif /* CONFIG_POST & CONFIG_SYS_POST_I2C */