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usb: renesas_usbhs: add usbhs_pipe_clear_without_sequence() function

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This patch adds usbhs_pipe_clear_without_sequence() function.
The controller has the pipe buffer and the PIPEnCTR.ACLRM can clear
it completely. But, it's also clear the data sequence. So, the driver
needs to get the sequence before.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Yoshihiro Shimoda 2017-12-06 17:18:32 +09:00 committed by Felipe Balbi
parent 469e297813
commit 8d8a0435d1
2 changed files with 16 additions and 5 deletions
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19
drivers/usb/renesas_usbhs/pipe.c
View file

@ -590,10 +590,22 @@ void usbhs_pipe_clear(struct usbhs_pipe *pipe)
}
}
void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable)
/* Should call usbhsp_pipe_select() before */
void usbhs_pipe_clear_without_sequence(struct usbhs_pipe *pipe,
int needs_bfre, int bfre_enable)
{
int sequence;
usbhsp_pipe_select(pipe);
sequence = usbhs_pipe_get_data_sequence(pipe);
if (needs_bfre)
usbhsp_pipe_cfg_set(pipe, BFRE, bfre_enable ? BFRE : 0);
usbhs_pipe_clear(pipe);
usbhs_pipe_data_sequence(pipe, sequence);
}
void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable)
{
if (usbhs_pipe_is_dcp(pipe))
return;
@ -602,10 +614,7 @@ void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable)
if (!(enable ^ !!(usbhsp_pipe_cfg_get(pipe) & BFRE)))
return;
sequence = usbhs_pipe_get_data_sequence(pipe);
usbhsp_pipe_cfg_set(pipe, BFRE, enable ? BFRE : 0);
usbhs_pipe_clear(pipe);
usbhs_pipe_data_sequence(pipe, sequence);
usbhs_pipe_clear_without_sequence(pipe, 1, enable);
}
static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)

2
drivers/usb/renesas_usbhs/pipe.h
View file

@ -80,6 +80,8 @@ void usbhs_pipe_init(struct usbhs_priv *priv,
struct usbhs_pkt *pkt, int map));
int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe);
void usbhs_pipe_clear(struct usbhs_pipe *pipe);
void usbhs_pipe_clear_without_sequence(struct usbhs_pipe *pipe,
int needs_bfre, int bfre_enable);
int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe);
void usbhs_pipe_enable(struct usbhs_pipe *pipe);
void usbhs_pipe_disable(struct usbhs_pipe *pipe);