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review.trustedfirmware.org / hafnium / third_party / linux / 157378f43faad830e4aa3815bde5fa9f9a9f5be6 / . / drivers / usb / renesas_usbhs / fifo.h
blob: 039a2b993157760b498d3daef45e53285081ffbf [file] [log] [blame]
Olivier Deprez157378f2022-04-04 15:47:50 +0200[diff] [blame^]1/* SPDX-License-Identifier: GPL-1.0+ */
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]2/*
3 * Renesas USB driver
4 *
5 * Copyright (C) 2011 Renesas Solutions Corp.
6 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 */
8#ifndef RENESAS_USB_FIFO_H
9#define RENESAS_USB_FIFO_H
10
11#include <linux/interrupt.h>
12#include <linux/sh_dma.h>
13#include <linux/workqueue.h>
14#include <asm/dma.h>
15#include "pipe.h"
16
17struct usbhs_fifo {
18 char *name;
19 u32 port; /* xFIFO */
20 u32 sel; /* xFIFOSEL */
21 u32 ctr; /* xFIFOCTR */
22
23 struct usbhs_pipe *pipe;
24
25 struct dma_chan *tx_chan;
26 struct dma_chan *rx_chan;
27
28 struct sh_dmae_slave tx_slave;
29 struct sh_dmae_slave rx_slave;
30};
31
32#define USBHS_MAX_NUM_DFIFO 4
33struct usbhs_fifo_info {
34 struct usbhs_fifo cfifo;
35 struct usbhs_fifo dfifo[USBHS_MAX_NUM_DFIFO];
36};
37#define usbhsf_get_dnfifo(p, n) (&((p)->fifo_info.dfifo[n]))
38#define usbhs_for_each_dfifo(priv, dfifo, i) \
39 for ((i) = 0; \
40 ((i) < USBHS_MAX_NUM_DFIFO) && \
41 ((dfifo) = usbhsf_get_dnfifo(priv, (i))); \
42 (i)++)
43
44struct usbhs_pkt_handle;
45struct usbhs_pkt {
46 struct list_head node;
47 struct usbhs_pipe *pipe;
48 const struct usbhs_pkt_handle *handler;
49 void (*done)(struct usbhs_priv *priv,
50 struct usbhs_pkt *pkt);
51 struct work_struct work;
52 dma_addr_t dma;
Olivier Deprez0e641232021-09-23 10:07:05 +0200[diff] [blame]53 const struct dmaengine_result *dma_result;
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]54 void *buf;
55 int length;
56 int trans;
57 int actual;
58 int zero;
59 int sequence;
60};
61
62struct usbhs_pkt_handle {
63 int (*prepare)(struct usbhs_pkt *pkt, int *is_done);
64 int (*try_run)(struct usbhs_pkt *pkt, int *is_done);
65 int (*dma_done)(struct usbhs_pkt *pkt, int *is_done);
66};
67
68/*
69 * fifo
70 */
71int usbhs_fifo_probe(struct usbhs_priv *priv);
72void usbhs_fifo_remove(struct usbhs_priv *priv);
73void usbhs_fifo_init(struct usbhs_priv *priv);
74void usbhs_fifo_quit(struct usbhs_priv *priv);
75void usbhs_fifo_clear_dcp(struct usbhs_pipe *pipe);
76
77/*
78 * packet info
79 */
80extern const struct usbhs_pkt_handle usbhs_fifo_pio_push_handler;
81extern const struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler;
82extern const struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler;
83
84extern const struct usbhs_pkt_handle usbhs_fifo_dma_push_handler;
85extern const struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler;
86
87extern const struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler;
88extern const struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler;
89
90extern const struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler;
91extern const struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler;
92
93void usbhs_pkt_init(struct usbhs_pkt *pkt);
94void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
95 void (*done)(struct usbhs_priv *priv,
96 struct usbhs_pkt *pkt),
97 void *buf, int len, int zero, int sequence);
98struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt);
99void usbhs_pkt_start(struct usbhs_pipe *pipe);
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame]100struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe);
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]101
102#endif /* RENESAS_USB_FIFO_H */