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usb: gadget: renesas_usbhs: add data/status stage handler 

mod_host needs data/status stage handler

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Kuninori Morimoto 2011-10-10 22:07:08 -07:00 committed by Felipe Balbi
parent 89c1d2e7b5
commit 9e74d601de
2 changed files with 150 additions and 0 deletions
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145
drivers/usb/renesas_usbhs/fifo.c
View File

@ -320,6 +320,151 @@ static int usbhsf_fifo_select(struct usbhs_pipe *pipe,
return -EIO;
}
/*
* DCP status stage
*/
static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done)
{
struct usbhs_pipe *pipe = pkt->pipe;
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
struct device *dev = usbhs_priv_to_dev(priv);
int ret;
usbhs_pipe_disable(pipe);
ret = usbhsf_fifo_select(pipe, fifo, 1);
if (ret < 0) {
dev_err(dev, "%s() faile\n", __func__);
return ret;
}
usbhs_pipe_sequence_data1(pipe); /* DATA1 */
usbhsf_fifo_clear(pipe, fifo);
usbhsf_send_terminator(pipe, fifo);
usbhsf_fifo_unselect(pipe, fifo);
usbhsf_tx_irq_ctrl(pipe, 1);
usbhs_pipe_enable(pipe);
return ret;
}
static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done)
{
struct usbhs_pipe *pipe = pkt->pipe;
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */
struct device *dev = usbhs_priv_to_dev(priv);
int ret;
usbhs_pipe_disable(pipe);
ret = usbhsf_fifo_select(pipe, fifo, 0);
if (ret < 0) {
dev_err(dev, "%s() fail\n", __func__);
return ret;
}
usbhs_pipe_sequence_data1(pipe); /* DATA1 */
usbhsf_fifo_clear(pipe, fifo);
usbhsf_fifo_unselect(pipe, fifo);
usbhsf_rx_irq_ctrl(pipe, 1);
usbhs_pipe_enable(pipe);
return ret;
}
static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done)
{
struct usbhs_pipe *pipe = pkt->pipe;
if (pkt->handler == &usbhs_dcp_status_stage_in_handler)
usbhsf_tx_irq_ctrl(pipe, 0);
else
usbhsf_rx_irq_ctrl(pipe, 0);
pkt->actual = pkt->length;
*is_done = 1;
return 0;
}
struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = {
.prepare = usbhs_dcp_dir_switch_to_write,
.try_run = usbhs_dcp_dir_switch_done,
};
struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = {
.prepare = usbhs_dcp_dir_switch_to_read,
.try_run = usbhs_dcp_dir_switch_done,
};
/*
* DCP data stage (push)
*/
static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done)
{
struct usbhs_pipe *pipe = pkt->pipe;
usbhs_pipe_sequence_data1(pipe); /* DATA1 */
/*
* change handler to PIO push
*/
pkt->handler = &usbhs_fifo_pio_push_handler;
return pkt->handler->prepare(pkt, is_done);
}
struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = {
.prepare = usbhsf_dcp_data_stage_try_push,
};
/*
* DCP data stage (pop)
*/
static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt,
int *is_done)
{
struct usbhs_pipe *pipe = pkt->pipe;
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv);
if (usbhs_pipe_is_busy(pipe))
return 0;
/*
* prepare pop for DCP should
* - change DCP direction,
* - clear fifo
* - DATA1
*/
usbhs_pipe_disable(pipe);
usbhs_pipe_sequence_data1(pipe); /* DATA1 */
usbhsf_fifo_select(pipe, fifo, 0);
usbhsf_fifo_clear(pipe, fifo);
usbhsf_fifo_unselect(pipe, fifo);
/*
* change handler to PIO pop
*/
pkt->handler = &usbhs_fifo_pio_pop_handler;
return pkt->handler->prepare(pkt, is_done);
}
struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = {
.prepare = usbhsf_dcp_data_stage_prepare_pop,
};
/*
* PIO push handler
*/

5
drivers/usb/renesas_usbhs/fifo.h
View File

@ -85,6 +85,11 @@ extern struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler;
extern struct usbhs_pkt_handle usbhs_fifo_dma_push_handler;
extern struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler;
extern struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler;
extern struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler;
extern struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler;
extern 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,