forked from Minki/linux
d3cf6a4b01
This patch expands USB-DMAC channels for R-Car Gen2 SoCs. The SoCs
have 4 channels. If d{2,3}_{t,x}x_id are not set, this driver never
uses the expanded USB-DMAC channels.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/*
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* Renesas USB driver
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*
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* Copyright (C) 2011 Renesas Solutions Corp.
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* Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef RENESAS_USB_FIFO_H
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#define RENESAS_USB_FIFO_H
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#include <linux/interrupt.h>
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#include <linux/sh_dma.h>
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#include <linux/workqueue.h>
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#include <asm/dma.h>
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#include "pipe.h"
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struct usbhs_fifo {
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char *name;
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u32 port; /* xFIFO */
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u32 sel; /* xFIFOSEL */
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u32 ctr; /* xFIFOCTR */
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struct usbhs_pipe *pipe;
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struct dma_chan *tx_chan;
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struct dma_chan *rx_chan;
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struct sh_dmae_slave tx_slave;
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struct sh_dmae_slave rx_slave;
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};
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#define USBHS_MAX_NUM_DFIFO 4
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struct usbhs_fifo_info {
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struct usbhs_fifo cfifo;
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struct usbhs_fifo dfifo[USBHS_MAX_NUM_DFIFO];
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};
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#define usbhsf_get_dnfifo(p, n) (&((p)->fifo_info.dfifo[n]))
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#define usbhs_for_each_dfifo(priv, dfifo, i) \
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for ((i) = 0, dfifo = usbhsf_get_dnfifo(priv, (i)); \
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((i) < USBHS_MAX_NUM_DFIFO); \
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(i)++, dfifo = usbhsf_get_dnfifo(priv, (i)))
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struct usbhs_pkt_handle;
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struct usbhs_pkt {
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struct list_head node;
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struct usbhs_pipe *pipe;
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struct usbhs_pkt_handle *handler;
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void (*done)(struct usbhs_priv *priv,
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struct usbhs_pkt *pkt);
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struct work_struct work;
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dma_addr_t dma;
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void *buf;
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int length;
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int trans;
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int actual;
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int zero;
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int sequence;
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};
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struct usbhs_pkt_handle {
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int (*prepare)(struct usbhs_pkt *pkt, int *is_done);
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int (*try_run)(struct usbhs_pkt *pkt, int *is_done);
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int (*dma_done)(struct usbhs_pkt *pkt, int *is_done);
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};
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/*
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* fifo
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*/
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int usbhs_fifo_probe(struct usbhs_priv *priv);
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void usbhs_fifo_remove(struct usbhs_priv *priv);
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void usbhs_fifo_init(struct usbhs_priv *priv);
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void usbhs_fifo_quit(struct usbhs_priv *priv);
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void usbhs_fifo_clear_dcp(struct usbhs_pipe *pipe);
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/*
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* packet info
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*/
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extern struct usbhs_pkt_handle usbhs_fifo_pio_push_handler;
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extern struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler;
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extern struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler;
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extern struct usbhs_pkt_handle usbhs_fifo_dma_push_handler;
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extern struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler;
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extern struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler;
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extern struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler;
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extern struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler;
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extern struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler;
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void usbhs_pkt_init(struct usbhs_pkt *pkt);
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void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
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void (*done)(struct usbhs_priv *priv,
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struct usbhs_pkt *pkt),
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void *buf, int len, int zero, int sequence);
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struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt);
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void usbhs_pkt_start(struct usbhs_pipe *pipe);
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#endif /* RENESAS_USB_FIFO_H */
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