ab330cf388
Some Renesas SoCs have the USB-DMAC. It is able to terminate transfers when a short packet is received, even if less bytes than the transfer counter size have been received. Also, it is able to send a short packet even if the packet size is not multiples of 8bytes. Since the previous code has used the interruption of USBHS controller when receiving packets even if this driver has used a dmac, a lot of interruptions has happened. This patch will reduce such interruptions. This patch allows to use the USB-DMAC on R-Car H2 and M2. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
123 lines
3.8 KiB
C
123 lines
3.8 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_PIPE_H
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#define RENESAS_USB_PIPE_H
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#include "common.h"
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#include "fifo.h"
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/*
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* struct
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*/
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struct usbhs_pipe {
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u32 pipe_type; /* USB_ENDPOINT_XFER_xxx */
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struct usbhs_priv *priv;
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struct usbhs_fifo *fifo;
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struct list_head list;
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int maxp;
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u32 flags;
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#define USBHS_PIPE_FLAGS_IS_USED (1 << 0)
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#define USBHS_PIPE_FLAGS_IS_DIR_IN (1 << 1)
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#define USBHS_PIPE_FLAGS_IS_DIR_HOST (1 << 2)
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#define USBHS_PIPE_FLAGS_IS_RUNNING (1 << 3)
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struct usbhs_pkt_handle *handler;
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void *mod_private;
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};
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struct usbhs_pipe_info {
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struct usbhs_pipe *pipe;
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int size; /* array size of "pipe" */
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int bufnmb_last; /* FIXME : driver needs good allocator */
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int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map);
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};
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/*
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* pipe list
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*/
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#define __usbhs_for_each_pipe(start, pos, info, i) \
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for ((i) = start; \
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((i) < (info)->size) && ((pos) = (info)->pipe + (i)); \
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(i)++)
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#define usbhs_for_each_pipe(pos, priv, i) \
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__usbhs_for_each_pipe(1, pos, &((priv)->pipe_info), i)
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#define usbhs_for_each_pipe_with_dcp(pos, priv, i) \
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__usbhs_for_each_pipe(0, pos, &((priv)->pipe_info), i)
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/*
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* data
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*/
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#define usbhs_priv_to_pipeinfo(pr) (&(pr)->pipe_info)
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/*
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* pipe control
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*/
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char *usbhs_pipe_name(struct usbhs_pipe *pipe);
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struct usbhs_pipe
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*usbhs_pipe_malloc(struct usbhs_priv *priv, int endpoint_type, int dir_in);
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void usbhs_pipe_free(struct usbhs_pipe *pipe);
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int usbhs_pipe_probe(struct usbhs_priv *priv);
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void usbhs_pipe_remove(struct usbhs_priv *priv);
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int usbhs_pipe_is_dir_in(struct usbhs_pipe *pipe);
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int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe);
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int usbhs_pipe_is_running(struct usbhs_pipe *pipe);
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void usbhs_pipe_running(struct usbhs_pipe *pipe, int running);
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void usbhs_pipe_init(struct usbhs_priv *priv,
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int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map));
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int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe);
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void usbhs_pipe_clear(struct usbhs_pipe *pipe);
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int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe);
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void usbhs_pipe_enable(struct usbhs_pipe *pipe);
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void usbhs_pipe_disable(struct usbhs_pipe *pipe);
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void usbhs_pipe_stall(struct usbhs_pipe *pipe);
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int usbhs_pipe_is_stall(struct usbhs_pipe *pipe);
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void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len);
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void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo);
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void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
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u16 epnum, u16 maxp);
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void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable);
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#define usbhs_pipe_sequence_data0(pipe) usbhs_pipe_data_sequence(pipe, 0)
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#define usbhs_pipe_sequence_data1(pipe) usbhs_pipe_data_sequence(pipe, 1)
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void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int data);
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#define usbhs_pipe_to_priv(p) ((p)->priv)
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#define usbhs_pipe_number(p) (int)((p) - (p)->priv->pipe_info.pipe)
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#define usbhs_pipe_is_dcp(p) ((p)->priv->pipe_info.pipe == (p))
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#define usbhs_pipe_to_fifo(p) ((p)->fifo)
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#define usbhs_pipe_is_busy(p) usbhs_pipe_to_fifo(p)
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#define usbhs_pipe_type(p) ((p)->pipe_type)
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#define usbhs_pipe_type_is(p, t) ((p)->pipe_type == t)
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/*
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* dcp control
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*/
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struct usbhs_pipe *usbhs_dcp_malloc(struct usbhs_priv *priv);
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void usbhs_dcp_control_transfer_done(struct usbhs_pipe *pipe);
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void usbhs_dcp_dir_for_host(struct usbhs_pipe *pipe, int dir_out);
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#endif /* RENESAS_USB_PIPE_H */
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