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authorThomas Chou <thomas@wytron.com.tw>2015-10-07 20:20:51 +0800
committerThomas Chou <thomas@wytron.com.tw>2015-10-23 07:37:03 +0800
commit4395e06eb9907e22869cfe3bf6259a0f0cefca13 (patch)
treecd7e94d0047ac23674a164f93440ce7fc59b8e46 /include
parent2e2da4c67dc1adc43a2d1417d8595bb2543ecfe6 (diff)
dm: implement a Miscellaneous uclass
Implement a Miscellaneous uclass with generic read or write operations. This class is used only for those do not fit other more general classes. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include')
-rw-r--r--include/dm/uclass-id.h1
-rw-r--r--include/misc.h79
2 files changed, 80 insertions, 0 deletions
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index 330ecd2388..886a44c134 100644
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -39,6 +39,7 @@ enum uclass_id {
UCLASS_LED, /* Light-emitting diode (LED) */
UCLASS_LPC, /* x86 'low pin count' interface */
UCLASS_MASS_STORAGE, /* Mass storage device */
+ UCLASS_MISC, /* Miscellaneous device */
UCLASS_MMC, /* SD / MMC card or chip */
UCLASS_MOD_EXP, /* RSA Mod Exp device */
UCLASS_PCH, /* x86 platform controller hub */
diff --git a/include/misc.h b/include/misc.h
new file mode 100644
index 0000000000..7e9badfabd
--- /dev/null
+++ b/include/misc.h
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2015 Thomas Chou <thomas@wytron.com.tw>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _MISC_H_
+#define _MISC_H_
+
+/*
+ * Read the device to buffer, optional.
+ *
+ * @dev: the device
+ * @offset: offset to read the device
+ * @buf: pointer to data buffer
+ * @size: data size in bytes to read the device
+ * @return: 0 if OK, -ve on error
+ */
+int misc_read(struct udevice *dev, int offset, void *buf, int size);
+/*
+ * Write buffer to the device, optional.
+ *
+ * @dev: the device
+ * @offset: offset to write the device
+ * @buf: pointer to data buffer
+ * @size: data size in bytes to write the device
+ * @return: 0 if OK, -ve on error
+ */
+int misc_write(struct udevice *dev, int offset, void *buf, int size);
+/*
+ * Assert command to the device, optional.
+ *
+ * @dev: the device
+ * @request: command to be sent to the device
+ * @buf: pointer to buffer related to the requset
+ * @return: 0 if OK, -ve on error
+ */
+int misc_ioctl(struct udevice *dev, unsigned long request, void *buf);
+
+/*
+ * struct misc_ops - Driver model Misc operations
+ *
+ * The uclass interface is implemented by all miscellaneous devices which
+ * use driver model.
+ */
+struct misc_ops {
+ /*
+ * Read the device to buffer, optional.
+ *
+ * @dev: the device
+ * @offset: offset to read the device
+ * @buf: pointer to data buffer
+ * @size: data size in bytes to read the device
+ * @return: 0 if OK, -ve on error
+ */
+ int (*read)(struct udevice *dev, int offset, void *buf, int size);
+ /*
+ * Write buffer to the device, optional.
+ *
+ * @dev: the device
+ * @offset: offset to write the device
+ * @buf: pointer to data buffer
+ * @size: data size in bytes to write the device
+ * @return: 0 if OK, -ve on error
+ */
+ int (*write)(struct udevice *dev, int offset, const void *buf,
+ int size);
+ /*
+ * Assert command to the device, optional.
+ *
+ * @dev: the device
+ * @request: command to be sent to the device
+ * @buf: pointer to buffer related to the requset
+ * @return: 0 if OK, -ve on error
+ */
+ int (*ioctl)(struct udevice *dev, unsigned long request, void *buf);
+};
+
+#endif /* _MISC_H_ */