diff options
Diffstat (limited to 'drivers/usb/gadget/rcar/fifo.h')
| -rw-r--r-- | drivers/usb/gadget/rcar/fifo.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/drivers/usb/gadget/rcar/fifo.h b/drivers/usb/gadget/rcar/fifo.h new file mode 100644 index 00000000000..86746ca9bdd --- /dev/null +++ b/drivers/usb/gadget/rcar/fifo.h @@ -0,0 +1,114 @@ +/* SPDX-License-Identifier: GPL-1.0+ */ +/* + * Renesas USB driver + * + * Copyright (C) 2011 Renesas Solutions Corp. + * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> + */ +#ifndef RENESAS_USB_FIFO_H +#define RENESAS_USB_FIFO_H + +#include <dma.h> +#include "pipe.h" + +/* + * Drivers, using this library are expected to embed struct shdma_dev, + * struct shdma_chan, struct shdma_desc, and struct shdma_slave + * in their respective device, channel, descriptor and slave objects. + */ + +struct shdma_slave { + int slave_id; +}; + +/* Used by slave DMA clients to request DMA to/from a specific peripheral */ +struct sh_dmae_slave { + struct shdma_slave shdma_slave; /* Set by the platform */ +}; + +struct usbhs_fifo { + char *name; + u32 port; /* xFIFO */ + u32 sel; /* xFIFOSEL */ + u32 ctr; /* xFIFOCTR */ + + struct usbhs_pipe *pipe; + + struct dma_chan *tx_chan; + struct dma_chan *rx_chan; + + struct sh_dmae_slave tx_slave; + struct sh_dmae_slave rx_slave; +}; + +#define USBHS_MAX_NUM_DFIFO 4 +struct usbhs_fifo_info { + struct usbhs_fifo cfifo; + struct usbhs_fifo dfifo[USBHS_MAX_NUM_DFIFO]; +}; +#define usbhsf_get_dnfifo(p, n) (&((p)->fifo_info.dfifo[n])) +#define usbhs_for_each_dfifo(priv, dfifo, i) \ + for ((i) = 0; \ + ((i) < USBHS_MAX_NUM_DFIFO) && \ + ((dfifo) = usbhsf_get_dnfifo(priv, (i))); \ + (i)++) + +struct usbhs_pkt_handle; +struct usbhs_pkt { + struct list_head node; + struct usbhs_pipe *pipe; + const struct usbhs_pkt_handle *handler; + void (*done)(struct usbhs_priv *priv, + struct usbhs_pkt *pkt); + struct work_struct work; + dma_addr_t dma; + const struct dmaengine_result *dma_result; + void *buf; + int length; + int trans; + int actual; + int zero; + int sequence; +}; + +struct usbhs_pkt_handle { + int (*prepare)(struct usbhs_pkt *pkt, int *is_done); + int (*try_run)(struct usbhs_pkt *pkt, int *is_done); + int (*dma_done)(struct usbhs_pkt *pkt, int *is_done); +}; + +/* + * fifo + */ +int usbhs_fifo_probe(struct usbhs_priv *priv); +void usbhs_fifo_remove(struct usbhs_priv *priv); +void usbhs_fifo_init(struct usbhs_priv *priv); +void usbhs_fifo_quit(struct usbhs_priv *priv); +void usbhs_fifo_clear_dcp(struct usbhs_pipe *pipe); + +/* + * packet info + */ +extern const struct usbhs_pkt_handle usbhs_fifo_pio_push_handler; +extern const struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler; +extern const struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler; + +extern const struct usbhs_pkt_handle usbhs_fifo_dma_push_handler; +extern const struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler; + +extern const struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler; +extern const struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler; + +extern const struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler; +extern const struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler; + +void usbhs_pkt_init(struct usbhs_pkt *pkt); +void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt, + void (*done)(struct usbhs_priv *priv, + struct usbhs_pkt *pkt), + void *buf, int len, int zero, int sequence); +struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt); +void usbhs_pkt_start(struct usbhs_pipe *pipe); +struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe); + +#endif /* RENESAS_USB_FIFO_H */ |