usb/renesas_usbhs/fifo.h

0001 /* SPDX-License-Identifier: GPL-1.0+ */
0002 /*
0003  * Renesas USB driver
0004  *
0005  * Copyright (C) 2011 Renesas Solutions Corp.
0006  * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
0007  */
0008 #ifndef RENESAS_USB_FIFO_H
0009 #define RENESAS_USB_FIFO_H
0010
0011 #include <linux/interrupt.h>
0012 #include <linux/sh_dma.h>
0013 #include <linux/workqueue.h>
0014 #include <asm/dma.h>
0015 #include "pipe.h"
0016
0017 struct usbhs_fifo {
0018     char *name;
0019     u32 port;   /* xFIFO */
0020     u32 sel;    /* xFIFOSEL */
0021     u32 ctr;    /* xFIFOCTR */
0022
0023     struct usbhs_pipe   *pipe;
0024
0025     struct dma_chan     *tx_chan;
0026     struct dma_chan     *rx_chan;
0027
0028     struct sh_dmae_slave    tx_slave;
0029     struct sh_dmae_slave    rx_slave;
0030 };
0031
0032 #define USBHS_MAX_NUM_DFIFO 4
0033 struct usbhs_fifo_info {
0034     struct usbhs_fifo cfifo;
0035     struct usbhs_fifo dfifo[USBHS_MAX_NUM_DFIFO];
0036 };
0037 #define usbhsf_get_dnfifo(p, n) (&((p)->fifo_info.dfifo[n]))
0038 #define usbhs_for_each_dfifo(priv, dfifo, i)            \
0039     for ((i) = 0;                       \
0040          ((i) < USBHS_MAX_NUM_DFIFO) &&         \
0041              ((dfifo) = usbhsf_get_dnfifo(priv, (i)));  \
0042          (i)++)
0043
0044 struct usbhs_pkt_handle;
0045 struct usbhs_pkt {
0046     struct list_head node;
0047     struct usbhs_pipe *pipe;
0048     const struct usbhs_pkt_handle *handler;
0049     void (*done)(struct usbhs_priv *priv,
0050              struct usbhs_pkt *pkt);
0051     struct work_struct work;
0052     dma_addr_t dma;
0053     const struct dmaengine_result *dma_result;
0054     void *buf;
0055     int length;
0056     int trans;
0057     int actual;
0058     int zero;
0059     int sequence;
0060 };
0061
0062 struct usbhs_pkt_handle {
0063     int (*prepare)(struct usbhs_pkt *pkt, int *is_done);
0064     int (*try_run)(struct usbhs_pkt *pkt, int *is_done);
0065     int (*dma_done)(struct usbhs_pkt *pkt, int *is_done);
0066 };
0067
0068 /*
0069  * fifo
0070  */
0071 int usbhs_fifo_probe(struct usbhs_priv *priv);
0072 void usbhs_fifo_remove(struct usbhs_priv *priv);
0073 void usbhs_fifo_init(struct usbhs_priv *priv);
0074 void usbhs_fifo_quit(struct usbhs_priv *priv);
0075 void usbhs_fifo_clear_dcp(struct usbhs_pipe *pipe);
0076
0077 /*
0078  * packet info
0079  */
0080 extern const struct usbhs_pkt_handle usbhs_fifo_pio_push_handler;
0081 extern const struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler;
0082 extern const struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler;
0083
0084 extern const struct usbhs_pkt_handle usbhs_fifo_dma_push_handler;
0085 extern const struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler;
0086
0087 extern const struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler;
0088 extern const struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler;
0089
0090 extern const struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler;
0091 extern const struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler;
0092
0093 void usbhs_pkt_init(struct usbhs_pkt *pkt);
0094 void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
0095             void (*done)(struct usbhs_priv *priv,
0096                  struct usbhs_pkt *pkt),
0097             void *buf, int len, int zero, int sequence);
0098 struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt);
0099 void usbhs_pkt_start(struct usbhs_pipe *pipe);
0100 struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe);
0101
0102 #endif /* RENESAS_USB_FIFO_H */