+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __pch_h
#define __pch_h
+#include <linux/bitops.h>
#define PCH_RCBA 0xf0
#define BIOS_CTRL_BIOSWE BIT(0)
-/* Operations for the Platform Controller Hub */
+/* All the supported PCH ioctls */
+enum pch_req_t {
+ /* Returns HDA config info if Azalia V1CTL enabled, -ENOENT if not */
+ PCH_REQ_HDA_CONFIG,
+
+ /* Fills out a struct pch_pmbase_info if available */
+ PCH_REQ_PMBASE_INFO,
+
+ PCH_REQ_TEST1, /* Test requests for sandbox driver */
+ PCH_REQ_TEST2,
+ PCH_REQ_TEST3,
+
+ PCH_REQ_COUNT, /* Number of ioctrls supported */
+};
+
+/**
+ * struct pch_pmbase_info - Information filled in by PCH_REQ_PMBASE_INFO
+ *
+ * @pmbase: IO address of power-management controller
+ * @gpio0_en_ofs: Offset of GPIO0 enable register
+ * @pm1_sts_ofs: Offset of status register
+ * @pm1_cnt_ofs: Offset of control register
+ */
+struct pch_pmbase_info {
+ u16 base;
+ u8 gpio0_en_ofs;
+ u8 pm1_sts_ofs;
+ u8 pm1_cnt_ofs;
+};
+
+/**
+ * struct pch_ops - Operations for the Platform Controller Hub
+ *
+ * Consider using ioctl() to add rarely used or driver-specific operations.
+ */
struct pch_ops {
/**
* get_spi_base() - get the address of SPI base
* @return 0 if OK, -ve on error (e.g. there is no IO base)
*/
int (*get_io_base)(struct udevice *dev, u32 *iobasep);
+
+ /**
+ * ioctl() - perform misc read/write operations
+ *
+ * This is a catch-all operation intended to avoid adding lots of
+ * methods to this uclass, of which few are commonly used. Uncommon
+ * operations that pertain only to a few devices in this uclass should
+ * use this method instead of adding new methods.
+ *
+ * @dev: PCH device to check
+ * @req: PCH request ID
+ * @data: Input/output data
+ * @size: Size of input data (and maximum size of output data)
+ * @return size of output data on sucesss, -ve on error
+ */
+ int (*ioctl)(struct udevice *dev, enum pch_req_t req, void *data,
+ int size);
};
#define pch_get_ops(dev) ((struct pch_ops *)(dev)->driver->ops)
*/
int pch_get_io_base(struct udevice *dev, u32 *iobasep);
+/**
+ * pch_ioctl() - perform misc read/write operations
+ *
+ * This is a catch-all operation intended to avoid adding lots of
+ * methods to this uclass, of which few are commonly used. Uncommon
+ * operations that pertain only to a few devices in this uclass should
+ * use this method instead of adding new methods.
+ *
+ * @dev: PCH device to check
+ * @req: PCH request ID
+ * @data: Input/output data
+ * @size: Size of input data (and maximum size of output data)
+ * @return size of output data on sucesss, -ve on error
+ */
+int pch_ioctl(struct udevice *dev, ulong req, void *data, int size);
+
#endif