Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 144 insertions, 0 deletions

diff --git a/drivers/i3c/master/mipi-i3c-hci/hci.h b/drivers/i3c/master/mipi-i3c-hci/hci.h
new file mode 100644
index 000000000..f109923f6
--- /dev/null
+++ b/drivers/i3c/master/mipi-i3c-hci/hci.h
@@ -0,0 +1,144 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Copyright (c) 2020, MIPI Alliance, Inc.
+ *
+ * Author: Nicolas Pitre <npitre@baylibre.com>
+ *
+ * Common HCI stuff
+ */
+
+#ifndef HCI_H
+#define HCI_H
+
+
+/* Handy logging macro to save on line length */
+#define DBG(x, ...) pr_devel("%s: " x "\n", __func__, ##__VA_ARGS__)
+
+/* 32-bit word aware bit and mask macros */
+#define W0_MASK(h, l)  GENMASK((h) - 0,  (l) - 0)
+#define W1_MASK(h, l)  GENMASK((h) - 32, (l) - 32)
+#define W2_MASK(h, l)  GENMASK((h) - 64, (l) - 64)
+#define W3_MASK(h, l)  GENMASK((h) - 96, (l) - 96)
+
+/* Same for single bit macros (trailing _ to align with W*_MASK width) */
+#define W0_BIT_(x)  BIT((x) - 0)
+#define W1_BIT_(x)  BIT((x) - 32)
+#define W2_BIT_(x)  BIT((x) - 64)
+#define W3_BIT_(x)  BIT((x) - 96)
+
+
+struct hci_cmd_ops;
+
+/* Our main structure */
+struct i3c_hci {
+	struct i3c_master_controller master;
+	void __iomem *base_regs;
+	void __iomem *DAT_regs;
+	void __iomem *DCT_regs;
+	void __iomem *RHS_regs;
+	void __iomem *PIO_regs;
+	void __iomem *EXTCAPS_regs;
+	void __iomem *AUTOCMD_regs;
+	void __iomem *DEBUG_regs;
+	const struct hci_io_ops *io;
+	void *io_data;
+	const struct hci_cmd_ops *cmd;
+	atomic_t next_cmd_tid;
+	u32 caps;
+	unsigned int quirks;
+	unsigned int DAT_entries;
+	unsigned int DAT_entry_size;
+	void *DAT_data;
+	unsigned int DCT_entries;
+	unsigned int DCT_entry_size;
+	u8 version_major;
+	u8 version_minor;
+	u8 revision;
+	u32 vendor_mipi_id;
+	u32 vendor_version_id;
+	u32 vendor_product_id;
+	void *vendor_data;
+};
+
+
+/*
+ * Structure to represent a master initiated transfer.
+ * The rnw, data and data_len fields must be initialized before calling any
+ * hci->cmd->*() method. The cmd method will initialize cmd_desc[] and
+ * possibly modify (clear) the data field. Then xfer->cmd_desc[0] can
+ * be augmented with CMD_0_ROC and/or CMD_0_TOC.
+ * The completion field needs to be initialized before queueing with
+ * hci->io->queue_xfer(), and requires CMD_0_ROC to be set.
+ */
+struct hci_xfer {
+	u32 cmd_desc[4];
+	u32 response;
+	bool rnw;
+	void *data;
+	unsigned int data_len;
+	unsigned int cmd_tid;
+	struct completion *completion;
+	union {
+		struct {
+			/* PIO specific */
+			struct hci_xfer *next_xfer;
+			struct hci_xfer *next_data;
+			struct hci_xfer *next_resp;
+			unsigned int data_left;
+			u32 data_word_before_partial;
+		};
+		struct {
+			/* DMA specific */
+			dma_addr_t data_dma;
+			int ring_number;
+			int ring_entry;
+		};
+	};
+};
+
+static inline struct hci_xfer *hci_alloc_xfer(unsigned int n)
+{
+	return kcalloc(n, sizeof(struct hci_xfer), GFP_KERNEL);
+}
+
+static inline void hci_free_xfer(struct hci_xfer *xfer, unsigned int n)
+{
+	kfree(xfer);
+}
+
+
+/* This abstracts PIO vs DMA operations */
+struct hci_io_ops {
+	bool (*irq_handler)(struct i3c_hci *hci, unsigned int mask);
+	int (*queue_xfer)(struct i3c_hci *hci, struct hci_xfer *xfer, int n);
+	bool (*dequeue_xfer)(struct i3c_hci *hci, struct hci_xfer *xfer, int n);
+	int (*request_ibi)(struct i3c_hci *hci, struct i3c_dev_desc *dev,
+			   const struct i3c_ibi_setup *req);
+	void (*free_ibi)(struct i3c_hci *hci, struct i3c_dev_desc *dev);
+	void (*recycle_ibi_slot)(struct i3c_hci *hci, struct i3c_dev_desc *dev,
+				struct i3c_ibi_slot *slot);
+	int (*init)(struct i3c_hci *hci);
+	void (*cleanup)(struct i3c_hci *hci);
+};
+
+extern const struct hci_io_ops mipi_i3c_hci_pio;
+extern const struct hci_io_ops mipi_i3c_hci_dma;
+
+
+/* Our per device master private data */
+struct i3c_hci_dev_data {
+	int dat_idx;
+	void *ibi_data;
+};
+
+
+/* list of quirks */
+#define HCI_QUIRK_RAW_CCC	BIT(1)	/* CCC framing must be explicit */
+
+
+/* global functions */
+void mipi_i3c_hci_resume(struct i3c_hci *hci);
+void mipi_i3c_hci_pio_reset(struct i3c_hci *hci);
+void mipi_i3c_hci_dct_index_reset(struct i3c_hci *hci);
+
+#endif