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@@ -0,0 +1,74 @@
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+/*
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+ * Copyright (c) 2015 Google, Inc
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+ * Written by Simon Glass <sjg@chromium.org>
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+ *
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+ * SPDX-License-Identifier: GPL-2.0+
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+ */
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+
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+#ifndef __pch_h
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+#define __pch_h
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+
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+enum pch_version {
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+ PCHV_UNKNOWN,
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+ PCHV_7,
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+ PCHV_9,
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+};
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+
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+/* Operations for the Platform Controller Hub */
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+struct pch_ops {
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+ /**
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+ * get_sbase() - get the address of SPI base
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+ *
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+ * @dev: PCH device to check
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+ * @sbasep: Returns address of SPI base if available, else 0
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+ * @return 0 if OK, -ve on error (e.g. there is no SPI base)
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+ */
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+ int (*get_sbase)(struct udevice *dev, ulong *sbasep);
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+
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+ /**
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+ * get_version() - get the PCH version
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+ *
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+ * @return version, or -ENOSYS if unknown
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+ */
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+ enum pch_version (*get_version)(struct udevice *dev);
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+
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+ /**
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+ * set_spi_protect() - set whether SPI flash is protected or not
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+ *
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+ * @dev: PCH device to adjust
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+ * @protect: true to protect, false to unprotect
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+ *
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+ * @return 0 on success, -ENOSYS if not implemented
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+ */
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+ int (*set_spi_protect)(struct udevice *dev, bool protect);
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+};
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+
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+#define pch_get_ops(dev) ((struct pch_ops *)(dev)->driver->ops)
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+
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+/**
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+ * pch_get_sbase() - get the address of SPI base
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+ *
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+ * @dev: PCH device to check
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+ * @sbasep: Returns address of SPI base if available, else 0
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+ * @return 0 if OK, -ve on error (e.g. there is no SPI base)
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+ */
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+int pch_get_sbase(struct udevice *dev, ulong *sbasep);
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+
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+/**
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+ * pch_get_version() - get the PCH version
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+ *
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+ * @return version, or -ENOSYS if unknown
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+ */
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+enum pch_version pch_get_version(struct udevice *dev);
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+
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+/**
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+ * set_spi_protect() - set whether SPI flash is protected or not
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+ *
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+ * @dev: PCH device to adjust
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+ * @protect: true to protect, false to unprotect
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+ *
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+ * @return 0 on success, -ENOSYS if not implemented
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+ */
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+int pch_set_spi_protect(struct udevice *dev, bool protect);
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+
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+#endif
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