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1486 lines
34 KiB
1486 lines
34 KiB
// SPDX-License-Identifier: GPL-1.0+ |
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/* |
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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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* Copyright (C) 2019 Renesas Electronics Corporation |
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* Kuninori Morimoto <[email protected]> |
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*/ |
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#include <linux/delay.h> |
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#include <linux/io.h> |
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#include <linux/scatterlist.h> |
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#include "common.h" |
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#include "pipe.h" |
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|
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#define usbhsf_get_cfifo(p) (&((p)->fifo_info.cfifo)) |
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|
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#define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */ |
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|
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/* |
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* packet initialize |
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*/ |
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void usbhs_pkt_init(struct usbhs_pkt *pkt) |
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{ |
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INIT_LIST_HEAD(&pkt->node); |
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} |
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|
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/* |
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* packet control function |
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*/ |
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static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done) |
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{ |
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); |
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struct device *dev = usbhs_priv_to_dev(priv); |
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|
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dev_err(dev, "null handler\n"); |
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|
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return -EINVAL; |
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} |
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|
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static const struct usbhs_pkt_handle usbhsf_null_handler = { |
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.prepare = usbhsf_null_handle, |
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.try_run = usbhsf_null_handle, |
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}; |
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|
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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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{ |
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
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struct device *dev = usbhs_priv_to_dev(priv); |
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unsigned long flags; |
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|
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if (!done) { |
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dev_err(dev, "no done function\n"); |
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return; |
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} |
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|
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/******************** spin lock ********************/ |
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usbhs_lock(priv, flags); |
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|
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if (!pipe->handler) { |
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dev_err(dev, "no handler function\n"); |
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pipe->handler = &usbhsf_null_handler; |
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} |
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|
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list_move_tail(&pkt->node, &pipe->list); |
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|
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/* |
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* each pkt must hold own handler. |
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* because handler might be changed by its situation. |
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* dma handler -> pio handler. |
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*/ |
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pkt->pipe = pipe; |
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pkt->buf = buf; |
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pkt->handler = pipe->handler; |
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pkt->length = len; |
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pkt->zero = zero; |
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pkt->actual = 0; |
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pkt->done = done; |
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pkt->sequence = sequence; |
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|
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usbhs_unlock(priv, flags); |
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/******************** spin unlock ******************/ |
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} |
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|
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static void __usbhsf_pkt_del(struct usbhs_pkt *pkt) |
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{ |
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list_del_init(&pkt->node); |
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} |
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|
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struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe) |
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{ |
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return list_first_entry_or_null(&pipe->list, struct usbhs_pkt, node); |
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} |
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|
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static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe, |
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struct usbhs_fifo *fifo); |
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static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo, |
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struct usbhs_pkt *pkt); |
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#define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1) |
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#define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0) |
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static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map); |
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static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable); |
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static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable); |
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struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt) |
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{ |
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
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struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe); |
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unsigned long flags; |
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|
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/******************** spin lock ********************/ |
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usbhs_lock(priv, flags); |
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|
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usbhs_pipe_disable(pipe); |
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|
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if (!pkt) |
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pkt = __usbhsf_pkt_get(pipe); |
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|
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if (pkt) { |
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struct dma_chan *chan = NULL; |
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|
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if (fifo) |
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chan = usbhsf_dma_chan_get(fifo, pkt); |
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if (chan) { |
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dmaengine_terminate_all(chan); |
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usbhsf_dma_unmap(pkt); |
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} else { |
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if (usbhs_pipe_is_dir_in(pipe)) |
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usbhsf_rx_irq_ctrl(pipe, 0); |
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else |
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usbhsf_tx_irq_ctrl(pipe, 0); |
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} |
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|
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usbhs_pipe_clear_without_sequence(pipe, 0, 0); |
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usbhs_pipe_running(pipe, 0); |
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|
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__usbhsf_pkt_del(pkt); |
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} |
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if (fifo) |
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usbhsf_fifo_unselect(pipe, fifo); |
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|
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usbhs_unlock(priv, flags); |
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/******************** spin unlock ******************/ |
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|
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return pkt; |
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} |
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|
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enum { |
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USBHSF_PKT_PREPARE, |
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USBHSF_PKT_TRY_RUN, |
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USBHSF_PKT_DMA_DONE, |
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}; |
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|
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static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type) |
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{ |
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
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struct usbhs_pkt *pkt; |
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struct device *dev = usbhs_priv_to_dev(priv); |
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int (*func)(struct usbhs_pkt *pkt, int *is_done); |
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unsigned long flags; |
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int ret = 0; |
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int is_done = 0; |
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|
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/******************** spin lock ********************/ |
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usbhs_lock(priv, flags); |
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|
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pkt = __usbhsf_pkt_get(pipe); |
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if (!pkt) { |
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ret = -EINVAL; |
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goto __usbhs_pkt_handler_end; |
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} |
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|
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switch (type) { |
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case USBHSF_PKT_PREPARE: |
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func = pkt->handler->prepare; |
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break; |
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case USBHSF_PKT_TRY_RUN: |
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func = pkt->handler->try_run; |
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break; |
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case USBHSF_PKT_DMA_DONE: |
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func = pkt->handler->dma_done; |
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break; |
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default: |
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dev_err(dev, "unknown pkt handler\n"); |
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goto __usbhs_pkt_handler_end; |
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} |
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if (likely(func)) |
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ret = func(pkt, &is_done); |
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if (is_done) |
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__usbhsf_pkt_del(pkt); |
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|
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__usbhs_pkt_handler_end: |
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usbhs_unlock(priv, flags); |
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/******************** spin unlock ******************/ |
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|
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if (is_done) { |
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pkt->done(priv, pkt); |
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usbhs_pkt_start(pipe); |
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} |
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|
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return ret; |
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} |
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|
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void usbhs_pkt_start(struct usbhs_pipe *pipe) |
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{ |
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usbhsf_pkt_handler(pipe, USBHSF_PKT_PREPARE); |
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} |
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|
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/* |
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* irq enable/disable function |
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*/ |
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#define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_bempsts, e) |
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#define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_brdysts, e) |
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#define usbhsf_irq_callback_ctrl(pipe, status, enable) \ |
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({ \ |
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \ |
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struct usbhs_mod *mod = usbhs_mod_get_current(priv); \ |
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u16 status = (1 << usbhs_pipe_number(pipe)); \ |
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if (!mod) \ |
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return; \ |
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if (enable) \ |
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mod->status |= status; \ |
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else \ |
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mod->status &= ~status; \ |
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usbhs_irq_callback_update(priv, mod); \ |
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}) |
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|
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static void usbhsf_tx_irq_ctrl(struct usbhs_pipe *pipe, int enable) |
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{ |
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/* |
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* And DCP pipe can NOT use "ready interrupt" for "send" |
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* it should use "empty" interrupt. |
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* see |
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* "Operation" - "Interrupt Function" - "BRDY Interrupt" |
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* |
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* on the other hand, normal pipe can use "ready interrupt" for "send" |
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* even though it is single/double buffer |
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*/ |
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if (usbhs_pipe_is_dcp(pipe)) |
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usbhsf_irq_empty_ctrl(pipe, enable); |
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else |
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usbhsf_irq_ready_ctrl(pipe, enable); |
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} |
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|
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static void usbhsf_rx_irq_ctrl(struct usbhs_pipe *pipe, int enable) |
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{ |
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usbhsf_irq_ready_ctrl(pipe, enable); |
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} |
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|
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/* |
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* FIFO ctrl |
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*/ |
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static void usbhsf_send_terminator(struct usbhs_pipe *pipe, |
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struct usbhs_fifo *fifo) |
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{ |
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
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usbhs_bset(priv, fifo->ctr, BVAL, BVAL); |
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} |
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static int usbhsf_fifo_barrier(struct usbhs_priv *priv, |
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struct usbhs_fifo *fifo) |
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{ |
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/* The FIFO port is accessible */ |
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if (usbhs_read(priv, fifo->ctr) & FRDY) |
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return 0; |
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return -EBUSY; |
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} |
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|
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static void usbhsf_fifo_clear(struct usbhs_pipe *pipe, |
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struct usbhs_fifo *fifo) |
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{ |
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
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int ret = 0; |
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if (!usbhs_pipe_is_dcp(pipe)) { |
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/* |
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* This driver checks the pipe condition first to avoid -EBUSY |
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* from usbhsf_fifo_barrier() if the pipe is RX direction and |
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* empty. |
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*/ |
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if (usbhs_pipe_is_dir_in(pipe)) |
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ret = usbhs_pipe_is_accessible(pipe); |
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if (!ret) |
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ret = usbhsf_fifo_barrier(priv, fifo); |
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} |
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/* |
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* if non-DCP pipe, this driver should set BCLR when |
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* usbhsf_fifo_barrier() returns 0. |
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*/ |
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if (!ret) |
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usbhs_write(priv, fifo->ctr, BCLR); |
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} |
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static int usbhsf_fifo_rcv_len(struct usbhs_priv *priv, |
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struct usbhs_fifo *fifo) |
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{ |
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return usbhs_read(priv, fifo->ctr) & DTLN_MASK; |
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} |
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static void usbhsf_fifo_unselect(struct usbhs_pipe *pipe, |
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struct usbhs_fifo *fifo) |
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{ |
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
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|
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usbhs_pipe_select_fifo(pipe, NULL); |
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usbhs_write(priv, fifo->sel, 0); |
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} |
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static int usbhsf_fifo_select(struct usbhs_pipe *pipe, |
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struct usbhs_fifo *fifo, |
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int write) |
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{ |
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
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struct device *dev = usbhs_priv_to_dev(priv); |
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int timeout = 1024; |
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u16 mask = ((1 << 5) | 0xF); /* mask of ISEL | CURPIPE */ |
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u16 base = usbhs_pipe_number(pipe); /* CURPIPE */ |
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if (usbhs_pipe_is_busy(pipe) || |
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usbhsf_fifo_is_busy(fifo)) |
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return -EBUSY; |
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if (usbhs_pipe_is_dcp(pipe)) { |
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base |= (1 == write) << 5; /* ISEL */ |
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if (usbhs_mod_is_host(priv)) |
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usbhs_dcp_dir_for_host(pipe, write); |
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} |
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/* "base" will be used below */ |
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usbhs_write(priv, fifo->sel, base | MBW_32); |
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|
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/* check ISEL and CURPIPE value */ |
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while (timeout--) { |
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if (base == (mask & usbhs_read(priv, fifo->sel))) { |
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usbhs_pipe_select_fifo(pipe, fifo); |
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return 0; |
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} |
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udelay(10); |
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} |
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dev_err(dev, "fifo select error\n"); |
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|
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return -EIO; |
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} |
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|
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/* |
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* DCP status stage |
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*/ |
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static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done) |
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{ |
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struct usbhs_pipe *pipe = pkt->pipe; |
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
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struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
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struct device *dev = usbhs_priv_to_dev(priv); |
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int ret; |
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usbhs_pipe_disable(pipe); |
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|
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ret = usbhsf_fifo_select(pipe, fifo, 1); |
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if (ret < 0) { |
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dev_err(dev, "%s() failed\n", __func__); |
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return ret; |
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} |
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usbhs_pipe_sequence_data1(pipe); /* DATA1 */ |
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|
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usbhsf_fifo_clear(pipe, fifo); |
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usbhsf_send_terminator(pipe, fifo); |
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|
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usbhsf_fifo_unselect(pipe, fifo); |
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|
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usbhsf_tx_irq_ctrl(pipe, 1); |
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usbhs_pipe_enable(pipe); |
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|
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return ret; |
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} |
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|
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static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done) |
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{ |
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struct usbhs_pipe *pipe = pkt->pipe; |
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
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struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
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struct device *dev = usbhs_priv_to_dev(priv); |
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int ret; |
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|
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usbhs_pipe_disable(pipe); |
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|
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ret = usbhsf_fifo_select(pipe, fifo, 0); |
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if (ret < 0) { |
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dev_err(dev, "%s() fail\n", __func__); |
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return ret; |
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} |
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|
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usbhs_pipe_sequence_data1(pipe); /* DATA1 */ |
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usbhsf_fifo_clear(pipe, fifo); |
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|
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usbhsf_fifo_unselect(pipe, fifo); |
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|
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usbhsf_rx_irq_ctrl(pipe, 1); |
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usbhs_pipe_enable(pipe); |
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|
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return ret; |
|
|
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} |
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|
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static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done) |
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{ |
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struct usbhs_pipe *pipe = pkt->pipe; |
|
|
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if (pkt->handler == &usbhs_dcp_status_stage_in_handler) |
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usbhsf_tx_irq_ctrl(pipe, 0); |
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else |
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usbhsf_rx_irq_ctrl(pipe, 0); |
|
|
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pkt->actual = pkt->length; |
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*is_done = 1; |
|
|
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return 0; |
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} |
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|
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const struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = { |
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.prepare = usbhs_dcp_dir_switch_to_write, |
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.try_run = usbhs_dcp_dir_switch_done, |
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}; |
|
|
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const struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = { |
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.prepare = usbhs_dcp_dir_switch_to_read, |
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.try_run = usbhs_dcp_dir_switch_done, |
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}; |
|
|
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/* |
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* DCP data stage (push) |
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*/ |
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static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done) |
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{ |
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struct usbhs_pipe *pipe = pkt->pipe; |
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|
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usbhs_pipe_sequence_data1(pipe); /* DATA1 */ |
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|
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/* |
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* change handler to PIO push |
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*/ |
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pkt->handler = &usbhs_fifo_pio_push_handler; |
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|
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return pkt->handler->prepare(pkt, is_done); |
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} |
|
|
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const struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = { |
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.prepare = usbhsf_dcp_data_stage_try_push, |
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}; |
|
|
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/* |
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* DCP data stage (pop) |
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*/ |
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static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt, |
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int *is_done) |
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{ |
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struct usbhs_pipe *pipe = pkt->pipe; |
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
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struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); |
|
|
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if (usbhs_pipe_is_busy(pipe)) |
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return 0; |
|
|
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/* |
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* prepare pop for DCP should |
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* - change DCP direction, |
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* - clear fifo |
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* - DATA1 |
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*/ |
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usbhs_pipe_disable(pipe); |
|
|
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usbhs_pipe_sequence_data1(pipe); /* DATA1 */ |
|
|
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usbhsf_fifo_select(pipe, fifo, 0); |
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usbhsf_fifo_clear(pipe, fifo); |
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usbhsf_fifo_unselect(pipe, fifo); |
|
|
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/* |
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* change handler to PIO pop |
|
*/ |
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pkt->handler = &usbhs_fifo_pio_pop_handler; |
|
|
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return pkt->handler->prepare(pkt, is_done); |
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} |
|
|
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const struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = { |
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.prepare = usbhsf_dcp_data_stage_prepare_pop, |
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}; |
|
|
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/* |
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* PIO push handler |
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*/ |
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static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done) |
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{ |
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struct usbhs_pipe *pipe = pkt->pipe; |
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struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
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struct device *dev = usbhs_priv_to_dev(priv); |
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struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
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void __iomem *addr = priv->base + fifo->port; |
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u8 *buf; |
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int maxp = usbhs_pipe_get_maxpacket(pipe); |
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int total_len; |
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int i, ret, len; |
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int is_short; |
|
|
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usbhs_pipe_data_sequence(pipe, pkt->sequence); |
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pkt->sequence = -1; /* -1 sequence will be ignored */ |
|
|
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usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length); |
|
|
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ret = usbhsf_fifo_select(pipe, fifo, 1); |
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if (ret < 0) |
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return 0; |
|
|
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ret = usbhs_pipe_is_accessible(pipe); |
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if (ret < 0) { |
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/* inaccessible pipe is not an error */ |
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ret = 0; |
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goto usbhs_fifo_write_busy; |
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} |
|
|
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ret = usbhsf_fifo_barrier(priv, fifo); |
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if (ret < 0) |
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goto usbhs_fifo_write_busy; |
|
|
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buf = pkt->buf + pkt->actual; |
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len = pkt->length - pkt->actual; |
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len = min(len, maxp); |
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total_len = len; |
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is_short = total_len < maxp; |
|
|
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/* |
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* FIXME |
|
* |
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* 32-bit access only |
|
*/ |
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if (len >= 4 && !((unsigned long)buf & 0x03)) { |
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iowrite32_rep(addr, buf, len / 4); |
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len %= 4; |
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buf += total_len - len; |
|
} |
|
|
|
/* the rest operation */ |
|
if (usbhs_get_dparam(priv, cfifo_byte_addr)) { |
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for (i = 0; i < len; i++) |
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iowrite8(buf[i], addr + (i & 0x03)); |
|
} else { |
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for (i = 0; i < len; i++) |
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iowrite8(buf[i], addr + (0x03 - (i & 0x03))); |
|
} |
|
|
|
/* |
|
* variable update |
|
*/ |
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pkt->actual += total_len; |
|
|
|
if (pkt->actual < pkt->length) |
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*is_done = 0; /* there are remainder data */ |
|
else if (is_short) |
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*is_done = 1; /* short packet */ |
|
else |
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*is_done = !pkt->zero; /* send zero packet ? */ |
|
|
|
/* |
|
* pipe/irq handling |
|
*/ |
|
if (is_short) |
|
usbhsf_send_terminator(pipe, fifo); |
|
|
|
usbhsf_tx_irq_ctrl(pipe, !*is_done); |
|
usbhs_pipe_running(pipe, !*is_done); |
|
usbhs_pipe_enable(pipe); |
|
|
|
dev_dbg(dev, " send %d (%d/ %d/ %d/ %d)\n", |
|
usbhs_pipe_number(pipe), |
|
pkt->length, pkt->actual, *is_done, pkt->zero); |
|
|
|
usbhsf_fifo_unselect(pipe, fifo); |
|
|
|
return 0; |
|
|
|
usbhs_fifo_write_busy: |
|
usbhsf_fifo_unselect(pipe, fifo); |
|
|
|
/* |
|
* pipe is busy. |
|
* retry in interrupt |
|
*/ |
|
usbhsf_tx_irq_ctrl(pipe, 1); |
|
usbhs_pipe_running(pipe, 1); |
|
|
|
return ret; |
|
} |
|
|
|
static int usbhsf_pio_prepare_push(struct usbhs_pkt *pkt, int *is_done) |
|
{ |
|
if (usbhs_pipe_is_running(pkt->pipe)) |
|
return 0; |
|
|
|
return usbhsf_pio_try_push(pkt, is_done); |
|
} |
|
|
|
const struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = { |
|
.prepare = usbhsf_pio_prepare_push, |
|
.try_run = usbhsf_pio_try_push, |
|
}; |
|
|
|
/* |
|
* PIO pop handler |
|
*/ |
|
static int usbhsf_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; |
|
|
|
if (usbhs_pipe_is_running(pipe)) |
|
return 0; |
|
|
|
/* |
|
* pipe enable to prepare packet receive |
|
*/ |
|
usbhs_pipe_data_sequence(pipe, pkt->sequence); |
|
pkt->sequence = -1; /* -1 sequence will be ignored */ |
|
|
|
if (usbhs_pipe_is_dcp(pipe)) |
|
usbhsf_fifo_clear(pipe, fifo); |
|
|
|
usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length); |
|
usbhs_pipe_enable(pipe); |
|
usbhs_pipe_running(pipe, 1); |
|
usbhsf_rx_irq_ctrl(pipe, 1); |
|
|
|
return 0; |
|
} |
|
|
|
static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done) |
|
{ |
|
struct usbhs_pipe *pipe = pkt->pipe; |
|
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
|
struct device *dev = usbhs_priv_to_dev(priv); |
|
struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
|
void __iomem *addr = priv->base + fifo->port; |
|
u8 *buf; |
|
u32 data = 0; |
|
int maxp = usbhs_pipe_get_maxpacket(pipe); |
|
int rcv_len, len; |
|
int i, ret; |
|
int total_len = 0; |
|
|
|
ret = usbhsf_fifo_select(pipe, fifo, 0); |
|
if (ret < 0) |
|
return 0; |
|
|
|
ret = usbhsf_fifo_barrier(priv, fifo); |
|
if (ret < 0) |
|
goto usbhs_fifo_read_busy; |
|
|
|
rcv_len = usbhsf_fifo_rcv_len(priv, fifo); |
|
|
|
buf = pkt->buf + pkt->actual; |
|
len = pkt->length - pkt->actual; |
|
len = min(len, rcv_len); |
|
total_len = len; |
|
|
|
/* |
|
* update actual length first here to decide disable pipe. |
|
* if this pipe keeps BUF status and all data were popped, |
|
* then, next interrupt/token will be issued again |
|
*/ |
|
pkt->actual += total_len; |
|
|
|
if ((pkt->actual == pkt->length) || /* receive all data */ |
|
(total_len < maxp)) { /* short packet */ |
|
*is_done = 1; |
|
usbhsf_rx_irq_ctrl(pipe, 0); |
|
usbhs_pipe_running(pipe, 0); |
|
/* |
|
* If function mode, since this controller is possible to enter |
|
* Control Write status stage at this timing, this driver |
|
* should not disable the pipe. If such a case happens, this |
|
* controller is not able to complete the status stage. |
|
*/ |
|
if (!usbhs_mod_is_host(priv) && !usbhs_pipe_is_dcp(pipe)) |
|
usbhs_pipe_disable(pipe); /* disable pipe first */ |
|
} |
|
|
|
/* |
|
* Buffer clear if Zero-Length packet |
|
* |
|
* see |
|
* "Operation" - "FIFO Buffer Memory" - "FIFO Port Function" |
|
*/ |
|
if (0 == rcv_len) { |
|
pkt->zero = 1; |
|
usbhsf_fifo_clear(pipe, fifo); |
|
goto usbhs_fifo_read_end; |
|
} |
|
|
|
/* |
|
* FIXME |
|
* |
|
* 32-bit access only |
|
*/ |
|
if (len >= 4 && !((unsigned long)buf & 0x03)) { |
|
ioread32_rep(addr, buf, len / 4); |
|
len %= 4; |
|
buf += total_len - len; |
|
} |
|
|
|
/* the rest operation */ |
|
for (i = 0; i < len; i++) { |
|
if (!(i & 0x03)) |
|
data = ioread32(addr); |
|
|
|
buf[i] = (data >> ((i & 0x03) * 8)) & 0xff; |
|
} |
|
|
|
usbhs_fifo_read_end: |
|
dev_dbg(dev, " recv %d (%d/ %d/ %d/ %d)\n", |
|
usbhs_pipe_number(pipe), |
|
pkt->length, pkt->actual, *is_done, pkt->zero); |
|
|
|
usbhs_fifo_read_busy: |
|
usbhsf_fifo_unselect(pipe, fifo); |
|
|
|
return ret; |
|
} |
|
|
|
const struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = { |
|
.prepare = usbhsf_prepare_pop, |
|
.try_run = usbhsf_pio_try_pop, |
|
}; |
|
|
|
/* |
|
* DCP ctrol statge handler |
|
*/ |
|
static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done) |
|
{ |
|
usbhs_dcp_control_transfer_done(pkt->pipe); |
|
|
|
*is_done = 1; |
|
|
|
return 0; |
|
} |
|
|
|
const struct usbhs_pkt_handle usbhs_ctrl_stage_end_handler = { |
|
.prepare = usbhsf_ctrl_stage_end, |
|
.try_run = usbhsf_ctrl_stage_end, |
|
}; |
|
|
|
/* |
|
* DMA fifo functions |
|
*/ |
|
static struct dma_chan *usbhsf_dma_chan_get(struct usbhs_fifo *fifo, |
|
struct usbhs_pkt *pkt) |
|
{ |
|
if (&usbhs_fifo_dma_push_handler == pkt->handler) |
|
return fifo->tx_chan; |
|
|
|
if (&usbhs_fifo_dma_pop_handler == pkt->handler) |
|
return fifo->rx_chan; |
|
|
|
return NULL; |
|
} |
|
|
|
static struct usbhs_fifo *usbhsf_get_dma_fifo(struct usbhs_priv *priv, |
|
struct usbhs_pkt *pkt) |
|
{ |
|
struct usbhs_fifo *fifo; |
|
int i; |
|
|
|
usbhs_for_each_dfifo(priv, fifo, i) { |
|
if (usbhsf_dma_chan_get(fifo, pkt) && |
|
!usbhsf_fifo_is_busy(fifo)) |
|
return fifo; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
#define usbhsf_dma_start(p, f) __usbhsf_dma_ctrl(p, f, DREQE) |
|
#define usbhsf_dma_stop(p, f) __usbhsf_dma_ctrl(p, f, 0) |
|
static void __usbhsf_dma_ctrl(struct usbhs_pipe *pipe, |
|
struct usbhs_fifo *fifo, |
|
u16 dreqe) |
|
{ |
|
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
|
|
|
usbhs_bset(priv, fifo->sel, DREQE, dreqe); |
|
} |
|
|
|
static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map) |
|
{ |
|
struct usbhs_pipe *pipe = pkt->pipe; |
|
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
|
struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv); |
|
struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe); |
|
struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt); |
|
|
|
return info->dma_map_ctrl(chan->device->dev, pkt, map); |
|
} |
|
|
|
static void usbhsf_dma_complete(void *arg, |
|
const struct dmaengine_result *result); |
|
static void usbhsf_dma_xfer_preparing(struct usbhs_pkt *pkt) |
|
{ |
|
struct usbhs_pipe *pipe = pkt->pipe; |
|
struct usbhs_fifo *fifo; |
|
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
|
struct dma_async_tx_descriptor *desc; |
|
struct dma_chan *chan; |
|
struct device *dev = usbhs_priv_to_dev(priv); |
|
enum dma_transfer_direction dir; |
|
dma_cookie_t cookie; |
|
|
|
fifo = usbhs_pipe_to_fifo(pipe); |
|
if (!fifo) |
|
return; |
|
|
|
chan = usbhsf_dma_chan_get(fifo, pkt); |
|
dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV; |
|
|
|
desc = dmaengine_prep_slave_single(chan, pkt->dma + pkt->actual, |
|
pkt->trans, dir, |
|
DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
|
if (!desc) |
|
return; |
|
|
|
desc->callback_result = usbhsf_dma_complete; |
|
desc->callback_param = pkt; |
|
|
|
cookie = dmaengine_submit(desc); |
|
if (cookie < 0) { |
|
dev_err(dev, "Failed to submit dma descriptor\n"); |
|
return; |
|
} |
|
|
|
dev_dbg(dev, " %s %d (%d/ %d)\n", |
|
fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero); |
|
|
|
usbhs_pipe_running(pipe, 1); |
|
usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->trans); |
|
dma_async_issue_pending(chan); |
|
usbhsf_dma_start(pipe, fifo); |
|
usbhs_pipe_enable(pipe); |
|
} |
|
|
|
static void xfer_work(struct work_struct *work) |
|
{ |
|
struct usbhs_pkt *pkt = container_of(work, struct usbhs_pkt, work); |
|
struct usbhs_pipe *pipe = pkt->pipe; |
|
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
|
unsigned long flags; |
|
|
|
usbhs_lock(priv, flags); |
|
usbhsf_dma_xfer_preparing(pkt); |
|
usbhs_unlock(priv, flags); |
|
} |
|
|
|
/* |
|
* DMA push handler |
|
*/ |
|
static int usbhsf_dma_prepare_push(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; |
|
int len = pkt->length - pkt->actual; |
|
int ret; |
|
uintptr_t align_mask; |
|
|
|
if (usbhs_pipe_is_busy(pipe)) |
|
return 0; |
|
|
|
/* use PIO if packet is less than pio_dma_border or pipe is DCP */ |
|
if ((len < usbhs_get_dparam(priv, pio_dma_border)) || |
|
usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC)) |
|
goto usbhsf_pio_prepare_push; |
|
|
|
/* check data length if this driver don't use USB-DMAC */ |
|
if (!usbhs_get_dparam(priv, has_usb_dmac) && len & 0x7) |
|
goto usbhsf_pio_prepare_push; |
|
|
|
/* check buffer alignment */ |
|
align_mask = usbhs_get_dparam(priv, has_usb_dmac) ? |
|
USBHS_USB_DMAC_XFER_SIZE - 1 : 0x7; |
|
if ((uintptr_t)(pkt->buf + pkt->actual) & align_mask) |
|
goto usbhsf_pio_prepare_push; |
|
|
|
/* return at this time if the pipe is running */ |
|
if (usbhs_pipe_is_running(pipe)) |
|
return 0; |
|
|
|
/* get enable DMA fifo */ |
|
fifo = usbhsf_get_dma_fifo(priv, pkt); |
|
if (!fifo) |
|
goto usbhsf_pio_prepare_push; |
|
|
|
ret = usbhsf_fifo_select(pipe, fifo, 0); |
|
if (ret < 0) |
|
goto usbhsf_pio_prepare_push; |
|
|
|
if (usbhsf_dma_map(pkt) < 0) |
|
goto usbhsf_pio_prepare_push_unselect; |
|
|
|
pkt->trans = len; |
|
|
|
usbhsf_tx_irq_ctrl(pipe, 0); |
|
/* FIXME: Workaound for usb dmac that driver can be used in atomic */ |
|
if (usbhs_get_dparam(priv, has_usb_dmac)) { |
|
usbhsf_dma_xfer_preparing(pkt); |
|
} else { |
|
INIT_WORK(&pkt->work, xfer_work); |
|
schedule_work(&pkt->work); |
|
} |
|
|
|
return 0; |
|
|
|
usbhsf_pio_prepare_push_unselect: |
|
usbhsf_fifo_unselect(pipe, fifo); |
|
usbhsf_pio_prepare_push: |
|
/* |
|
* change handler to PIO |
|
*/ |
|
pkt->handler = &usbhs_fifo_pio_push_handler; |
|
|
|
return pkt->handler->prepare(pkt, is_done); |
|
} |
|
|
|
static int usbhsf_dma_push_done(struct usbhs_pkt *pkt, int *is_done) |
|
{ |
|
struct usbhs_pipe *pipe = pkt->pipe; |
|
int is_short = pkt->trans % usbhs_pipe_get_maxpacket(pipe); |
|
|
|
pkt->actual += pkt->trans; |
|
|
|
if (pkt->actual < pkt->length) |
|
*is_done = 0; /* there are remainder data */ |
|
else if (is_short) |
|
*is_done = 1; /* short packet */ |
|
else |
|
*is_done = !pkt->zero; /* send zero packet? */ |
|
|
|
usbhs_pipe_running(pipe, !*is_done); |
|
|
|
usbhsf_dma_stop(pipe, pipe->fifo); |
|
usbhsf_dma_unmap(pkt); |
|
usbhsf_fifo_unselect(pipe, pipe->fifo); |
|
|
|
if (!*is_done) { |
|
/* change handler to PIO */ |
|
pkt->handler = &usbhs_fifo_pio_push_handler; |
|
return pkt->handler->try_run(pkt, is_done); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
const struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = { |
|
.prepare = usbhsf_dma_prepare_push, |
|
.dma_done = usbhsf_dma_push_done, |
|
}; |
|
|
|
/* |
|
* DMA pop handler |
|
*/ |
|
|
|
static int usbhsf_dma_prepare_pop_with_rx_irq(struct usbhs_pkt *pkt, |
|
int *is_done) |
|
{ |
|
return usbhsf_prepare_pop(pkt, is_done); |
|
} |
|
|
|
static int usbhsf_dma_prepare_pop_with_usb_dmac(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; |
|
int ret; |
|
|
|
if (usbhs_pipe_is_busy(pipe)) |
|
return 0; |
|
|
|
/* use PIO if packet is less than pio_dma_border or pipe is DCP */ |
|
if ((pkt->length < usbhs_get_dparam(priv, pio_dma_border)) || |
|
usbhs_pipe_type_is(pipe, USB_ENDPOINT_XFER_ISOC)) |
|
goto usbhsf_pio_prepare_pop; |
|
|
|
fifo = usbhsf_get_dma_fifo(priv, pkt); |
|
if (!fifo) |
|
goto usbhsf_pio_prepare_pop; |
|
|
|
if ((uintptr_t)pkt->buf & (USBHS_USB_DMAC_XFER_SIZE - 1)) |
|
goto usbhsf_pio_prepare_pop; |
|
|
|
/* return at this time if the pipe is running */ |
|
if (usbhs_pipe_is_running(pipe)) |
|
return 0; |
|
|
|
usbhs_pipe_config_change_bfre(pipe, 1); |
|
|
|
ret = usbhsf_fifo_select(pipe, fifo, 0); |
|
if (ret < 0) |
|
goto usbhsf_pio_prepare_pop; |
|
|
|
if (usbhsf_dma_map(pkt) < 0) |
|
goto usbhsf_pio_prepare_pop_unselect; |
|
|
|
/* DMA */ |
|
|
|
/* |
|
* usbhs_fifo_dma_pop_handler :: prepare |
|
* enabled irq to come here. |
|
* but it is no longer needed for DMA. disable it. |
|
*/ |
|
usbhsf_rx_irq_ctrl(pipe, 0); |
|
|
|
pkt->trans = pkt->length; |
|
|
|
usbhsf_dma_xfer_preparing(pkt); |
|
|
|
return 0; |
|
|
|
usbhsf_pio_prepare_pop_unselect: |
|
usbhsf_fifo_unselect(pipe, fifo); |
|
usbhsf_pio_prepare_pop: |
|
|
|
/* |
|
* change handler to PIO |
|
*/ |
|
pkt->handler = &usbhs_fifo_pio_pop_handler; |
|
usbhs_pipe_config_change_bfre(pipe, 0); |
|
|
|
return pkt->handler->prepare(pkt, is_done); |
|
} |
|
|
|
static int usbhsf_dma_prepare_pop(struct usbhs_pkt *pkt, int *is_done) |
|
{ |
|
struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); |
|
|
|
if (usbhs_get_dparam(priv, has_usb_dmac)) |
|
return usbhsf_dma_prepare_pop_with_usb_dmac(pkt, is_done); |
|
else |
|
return usbhsf_dma_prepare_pop_with_rx_irq(pkt, is_done); |
|
} |
|
|
|
static int usbhsf_dma_try_pop_with_rx_irq(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; |
|
int len, ret; |
|
|
|
if (usbhs_pipe_is_busy(pipe)) |
|
return 0; |
|
|
|
if (usbhs_pipe_is_dcp(pipe)) |
|
goto usbhsf_pio_prepare_pop; |
|
|
|
/* get enable DMA fifo */ |
|
fifo = usbhsf_get_dma_fifo(priv, pkt); |
|
if (!fifo) |
|
goto usbhsf_pio_prepare_pop; |
|
|
|
if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */ |
|
goto usbhsf_pio_prepare_pop; |
|
|
|
ret = usbhsf_fifo_select(pipe, fifo, 0); |
|
if (ret < 0) |
|
goto usbhsf_pio_prepare_pop; |
|
|
|
/* use PIO if packet is less than pio_dma_border */ |
|
len = usbhsf_fifo_rcv_len(priv, fifo); |
|
len = min(pkt->length - pkt->actual, len); |
|
if (len & 0x7) /* 8byte alignment */ |
|
goto usbhsf_pio_prepare_pop_unselect; |
|
|
|
if (len < usbhs_get_dparam(priv, pio_dma_border)) |
|
goto usbhsf_pio_prepare_pop_unselect; |
|
|
|
ret = usbhsf_fifo_barrier(priv, fifo); |
|
if (ret < 0) |
|
goto usbhsf_pio_prepare_pop_unselect; |
|
|
|
if (usbhsf_dma_map(pkt) < 0) |
|
goto usbhsf_pio_prepare_pop_unselect; |
|
|
|
/* DMA */ |
|
|
|
/* |
|
* usbhs_fifo_dma_pop_handler :: prepare |
|
* enabled irq to come here. |
|
* but it is no longer needed for DMA. disable it. |
|
*/ |
|
usbhsf_rx_irq_ctrl(pipe, 0); |
|
|
|
pkt->trans = len; |
|
|
|
INIT_WORK(&pkt->work, xfer_work); |
|
schedule_work(&pkt->work); |
|
|
|
return 0; |
|
|
|
usbhsf_pio_prepare_pop_unselect: |
|
usbhsf_fifo_unselect(pipe, fifo); |
|
usbhsf_pio_prepare_pop: |
|
|
|
/* |
|
* change handler to PIO |
|
*/ |
|
pkt->handler = &usbhs_fifo_pio_pop_handler; |
|
|
|
return pkt->handler->try_run(pkt, is_done); |
|
} |
|
|
|
static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done) |
|
{ |
|
struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); |
|
|
|
BUG_ON(usbhs_get_dparam(priv, has_usb_dmac)); |
|
|
|
return usbhsf_dma_try_pop_with_rx_irq(pkt, is_done); |
|
} |
|
|
|
static int usbhsf_dma_pop_done_with_rx_irq(struct usbhs_pkt *pkt, int *is_done) |
|
{ |
|
struct usbhs_pipe *pipe = pkt->pipe; |
|
int maxp = usbhs_pipe_get_maxpacket(pipe); |
|
|
|
usbhsf_dma_stop(pipe, pipe->fifo); |
|
usbhsf_dma_unmap(pkt); |
|
usbhsf_fifo_unselect(pipe, pipe->fifo); |
|
|
|
pkt->actual += pkt->trans; |
|
|
|
if ((pkt->actual == pkt->length) || /* receive all data */ |
|
(pkt->trans < maxp)) { /* short packet */ |
|
*is_done = 1; |
|
usbhs_pipe_running(pipe, 0); |
|
} else { |
|
/* re-enable */ |
|
usbhs_pipe_running(pipe, 0); |
|
usbhsf_prepare_pop(pkt, is_done); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static size_t usbhs_dma_calc_received_size(struct usbhs_pkt *pkt, |
|
struct dma_chan *chan, int dtln) |
|
{ |
|
struct usbhs_pipe *pipe = pkt->pipe; |
|
size_t received_size; |
|
int maxp = usbhs_pipe_get_maxpacket(pipe); |
|
|
|
received_size = pkt->length - pkt->dma_result->residue; |
|
|
|
if (dtln) { |
|
received_size -= USBHS_USB_DMAC_XFER_SIZE; |
|
received_size &= ~(maxp - 1); |
|
received_size += dtln; |
|
} |
|
|
|
return received_size; |
|
} |
|
|
|
static int usbhsf_dma_pop_done_with_usb_dmac(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 = usbhs_pipe_to_fifo(pipe); |
|
struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt); |
|
int rcv_len; |
|
|
|
/* |
|
* Since the driver disables rx_irq in DMA mode, the interrupt handler |
|
* cannot the BRDYSTS. So, the function clears it here because the |
|
* driver may use PIO mode next time. |
|
*/ |
|
usbhs_xxxsts_clear(priv, BRDYSTS, usbhs_pipe_number(pipe)); |
|
|
|
rcv_len = usbhsf_fifo_rcv_len(priv, fifo); |
|
usbhsf_fifo_clear(pipe, fifo); |
|
pkt->actual = usbhs_dma_calc_received_size(pkt, chan, rcv_len); |
|
|
|
usbhs_pipe_running(pipe, 0); |
|
usbhsf_dma_stop(pipe, fifo); |
|
usbhsf_dma_unmap(pkt); |
|
usbhsf_fifo_unselect(pipe, pipe->fifo); |
|
|
|
/* The driver can assume the rx transaction is always "done" */ |
|
*is_done = 1; |
|
|
|
return 0; |
|
} |
|
|
|
static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *is_done) |
|
{ |
|
struct usbhs_priv *priv = usbhs_pipe_to_priv(pkt->pipe); |
|
|
|
if (usbhs_get_dparam(priv, has_usb_dmac)) |
|
return usbhsf_dma_pop_done_with_usb_dmac(pkt, is_done); |
|
else |
|
return usbhsf_dma_pop_done_with_rx_irq(pkt, is_done); |
|
} |
|
|
|
const struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = { |
|
.prepare = usbhsf_dma_prepare_pop, |
|
.try_run = usbhsf_dma_try_pop, |
|
.dma_done = usbhsf_dma_pop_done |
|
}; |
|
|
|
/* |
|
* DMA setting |
|
*/ |
|
static bool usbhsf_dma_filter(struct dma_chan *chan, void *param) |
|
{ |
|
struct sh_dmae_slave *slave = param; |
|
|
|
/* |
|
* FIXME |
|
* |
|
* usbhs doesn't recognize id = 0 as valid DMA |
|
*/ |
|
if (0 == slave->shdma_slave.slave_id) |
|
return false; |
|
|
|
chan->private = slave; |
|
|
|
return true; |
|
} |
|
|
|
static void usbhsf_dma_quit(struct usbhs_priv *priv, struct usbhs_fifo *fifo) |
|
{ |
|
if (fifo->tx_chan) |
|
dma_release_channel(fifo->tx_chan); |
|
if (fifo->rx_chan) |
|
dma_release_channel(fifo->rx_chan); |
|
|
|
fifo->tx_chan = NULL; |
|
fifo->rx_chan = NULL; |
|
} |
|
|
|
static void usbhsf_dma_init_pdev(struct usbhs_fifo *fifo) |
|
{ |
|
dma_cap_mask_t mask; |
|
|
|
dma_cap_zero(mask); |
|
dma_cap_set(DMA_SLAVE, mask); |
|
fifo->tx_chan = dma_request_channel(mask, usbhsf_dma_filter, |
|
&fifo->tx_slave); |
|
|
|
dma_cap_zero(mask); |
|
dma_cap_set(DMA_SLAVE, mask); |
|
fifo->rx_chan = dma_request_channel(mask, usbhsf_dma_filter, |
|
&fifo->rx_slave); |
|
} |
|
|
|
static void usbhsf_dma_init_dt(struct device *dev, struct usbhs_fifo *fifo, |
|
int channel) |
|
{ |
|
char name[16]; |
|
|
|
/* |
|
* To avoid complex handing for DnFIFOs, the driver uses each |
|
* DnFIFO as TX or RX direction (not bi-direction). |
|
* So, the driver uses odd channels for TX, even channels for RX. |
|
*/ |
|
snprintf(name, sizeof(name), "ch%d", channel); |
|
if (channel & 1) { |
|
fifo->tx_chan = dma_request_chan(dev, name); |
|
if (IS_ERR(fifo->tx_chan)) |
|
fifo->tx_chan = NULL; |
|
} else { |
|
fifo->rx_chan = dma_request_chan(dev, name); |
|
if (IS_ERR(fifo->rx_chan)) |
|
fifo->rx_chan = NULL; |
|
} |
|
} |
|
|
|
static void usbhsf_dma_init(struct usbhs_priv *priv, struct usbhs_fifo *fifo, |
|
int channel) |
|
{ |
|
struct device *dev = usbhs_priv_to_dev(priv); |
|
|
|
if (dev_of_node(dev)) |
|
usbhsf_dma_init_dt(dev, fifo, channel); |
|
else |
|
usbhsf_dma_init_pdev(fifo); |
|
|
|
if (fifo->tx_chan || fifo->rx_chan) |
|
dev_dbg(dev, "enable DMAEngine (%s%s%s)\n", |
|
fifo->name, |
|
fifo->tx_chan ? "[TX]" : " ", |
|
fifo->rx_chan ? "[RX]" : " "); |
|
} |
|
|
|
/* |
|
* irq functions |
|
*/ |
|
static int usbhsf_irq_empty(struct usbhs_priv *priv, |
|
struct usbhs_irq_state *irq_state) |
|
{ |
|
struct usbhs_pipe *pipe; |
|
struct device *dev = usbhs_priv_to_dev(priv); |
|
int i, ret; |
|
|
|
if (!irq_state->bempsts) { |
|
dev_err(dev, "debug %s !!\n", __func__); |
|
return -EIO; |
|
} |
|
|
|
dev_dbg(dev, "irq empty [0x%04x]\n", irq_state->bempsts); |
|
|
|
/* |
|
* search interrupted "pipe" |
|
* not "uep". |
|
*/ |
|
usbhs_for_each_pipe_with_dcp(pipe, priv, i) { |
|
if (!(irq_state->bempsts & (1 << i))) |
|
continue; |
|
|
|
ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); |
|
if (ret < 0) |
|
dev_err(dev, "irq_empty run_error %d : %d\n", i, ret); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int usbhsf_irq_ready(struct usbhs_priv *priv, |
|
struct usbhs_irq_state *irq_state) |
|
{ |
|
struct usbhs_pipe *pipe; |
|
struct device *dev = usbhs_priv_to_dev(priv); |
|
int i, ret; |
|
|
|
if (!irq_state->brdysts) { |
|
dev_err(dev, "debug %s !!\n", __func__); |
|
return -EIO; |
|
} |
|
|
|
dev_dbg(dev, "irq ready [0x%04x]\n", irq_state->brdysts); |
|
|
|
/* |
|
* search interrupted "pipe" |
|
* not "uep". |
|
*/ |
|
usbhs_for_each_pipe_with_dcp(pipe, priv, i) { |
|
if (!(irq_state->brdysts & (1 << i))) |
|
continue; |
|
|
|
ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); |
|
if (ret < 0) |
|
dev_err(dev, "irq_ready run_error %d : %d\n", i, ret); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void usbhsf_dma_complete(void *arg, |
|
const struct dmaengine_result *result) |
|
{ |
|
struct usbhs_pkt *pkt = arg; |
|
struct usbhs_pipe *pipe = pkt->pipe; |
|
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
|
struct device *dev = usbhs_priv_to_dev(priv); |
|
int ret; |
|
|
|
pkt->dma_result = result; |
|
ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_DMA_DONE); |
|
if (ret < 0) |
|
dev_err(dev, "dma_complete run_error %d : %d\n", |
|
usbhs_pipe_number(pipe), ret); |
|
} |
|
|
|
void usbhs_fifo_clear_dcp(struct usbhs_pipe *pipe) |
|
{ |
|
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); |
|
struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ |
|
|
|
/* clear DCP FIFO of transmission */ |
|
if (usbhsf_fifo_select(pipe, fifo, 1) < 0) |
|
return; |
|
usbhsf_fifo_clear(pipe, fifo); |
|
usbhsf_fifo_unselect(pipe, fifo); |
|
|
|
/* clear DCP FIFO of reception */ |
|
if (usbhsf_fifo_select(pipe, fifo, 0) < 0) |
|
return; |
|
usbhsf_fifo_clear(pipe, fifo); |
|
usbhsf_fifo_unselect(pipe, fifo); |
|
} |
|
|
|
/* |
|
* fifo init |
|
*/ |
|
void usbhs_fifo_init(struct usbhs_priv *priv) |
|
{ |
|
struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
|
struct usbhs_fifo *cfifo = usbhsf_get_cfifo(priv); |
|
struct usbhs_fifo *dfifo; |
|
int i; |
|
|
|
mod->irq_empty = usbhsf_irq_empty; |
|
mod->irq_ready = usbhsf_irq_ready; |
|
mod->irq_bempsts = 0; |
|
mod->irq_brdysts = 0; |
|
|
|
cfifo->pipe = NULL; |
|
usbhs_for_each_dfifo(priv, dfifo, i) |
|
dfifo->pipe = NULL; |
|
} |
|
|
|
void usbhs_fifo_quit(struct usbhs_priv *priv) |
|
{ |
|
struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
|
|
|
mod->irq_empty = NULL; |
|
mod->irq_ready = NULL; |
|
mod->irq_bempsts = 0; |
|
mod->irq_brdysts = 0; |
|
} |
|
|
|
#define __USBHS_DFIFO_INIT(priv, fifo, channel, fifo_port) \ |
|
do { \ |
|
fifo = usbhsf_get_dnfifo(priv, channel); \ |
|
fifo->name = "D"#channel"FIFO"; \ |
|
fifo->port = fifo_port; \ |
|
fifo->sel = D##channel##FIFOSEL; \ |
|
fifo->ctr = D##channel##FIFOCTR; \ |
|
fifo->tx_slave.shdma_slave.slave_id = \ |
|
usbhs_get_dparam(priv, d##channel##_tx_id); \ |
|
fifo->rx_slave.shdma_slave.slave_id = \ |
|
usbhs_get_dparam(priv, d##channel##_rx_id); \ |
|
usbhsf_dma_init(priv, fifo, channel); \ |
|
} while (0) |
|
|
|
#define USBHS_DFIFO_INIT(priv, fifo, channel) \ |
|
__USBHS_DFIFO_INIT(priv, fifo, channel, D##channel##FIFO) |
|
#define USBHS_DFIFO_INIT_NO_PORT(priv, fifo, channel) \ |
|
__USBHS_DFIFO_INIT(priv, fifo, channel, 0) |
|
|
|
int usbhs_fifo_probe(struct usbhs_priv *priv) |
|
{ |
|
struct usbhs_fifo *fifo; |
|
|
|
/* CFIFO */ |
|
fifo = usbhsf_get_cfifo(priv); |
|
fifo->name = "CFIFO"; |
|
fifo->port = CFIFO; |
|
fifo->sel = CFIFOSEL; |
|
fifo->ctr = CFIFOCTR; |
|
|
|
/* DFIFO */ |
|
USBHS_DFIFO_INIT(priv, fifo, 0); |
|
USBHS_DFIFO_INIT(priv, fifo, 1); |
|
USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 2); |
|
USBHS_DFIFO_INIT_NO_PORT(priv, fifo, 3); |
|
|
|
return 0; |
|
} |
|
|
|
void usbhs_fifo_remove(struct usbhs_priv *priv) |
|
{ |
|
struct usbhs_fifo *fifo; |
|
int i; |
|
|
|
usbhs_for_each_dfifo(priv, fifo, i) |
|
usbhsf_dma_quit(priv, fifo); |
|
}
|
|
|