1191 lines
26 KiB
C
1191 lines
26 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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#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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#define usbhsf_get_cfifo(p) (&((p)->fifo_info.cfifo))
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#define usbhsf_get_d0fifo(p) (&((p)->fifo_info.d0fifo))
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#define usbhsf_get_d1fifo(p) (&((p)->fifo_info.d1fifo))
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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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* 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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pkt->dma = DMA_ADDR_INVALID;
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INIT_LIST_HEAD(&pkt->node);
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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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dev_err(dev, "null handler\n");
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return -EINVAL;
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}
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static 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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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)
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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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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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/******************** spin lock ********************/
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usbhs_lock(priv, flags);
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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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list_del_init(&pkt->node);
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list_add_tail(&pkt->node, &pipe->list);
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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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usbhs_unlock(priv, flags);
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/******************** spin unlock ******************/
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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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static struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe)
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{
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if (list_empty(&pipe->list))
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return NULL;
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return list_entry(pipe->list.next, struct usbhs_pkt, node);
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}
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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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unsigned long flags;
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/******************** spin lock ********************/
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usbhs_lock(priv, flags);
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if (!pkt)
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pkt = __usbhsf_pkt_get(pipe);
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if (pkt)
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__usbhsf_pkt_del(pkt);
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usbhs_unlock(priv, flags);
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/******************** spin unlock ******************/
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return pkt;
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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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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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/******************** spin lock ********************/
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usbhs_lock(priv, flags);
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pkt = __usbhsf_pkt_get(pipe);
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if (!pkt)
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goto __usbhs_pkt_handler_end;
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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 hander\n");
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goto __usbhs_pkt_handler_end;
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}
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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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__usbhs_pkt_handler_end:
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usbhs_unlock(priv, flags);
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/******************** spin unlock ******************/
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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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return ret;
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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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* irq enable/disable function
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*/
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#define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, bempsts, e)
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#define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, 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->irq_##status |= status; \
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else \
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mod->irq_##status &= ~status; \
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usbhs_irq_callback_update(priv, mod); \
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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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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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* 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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int timeout = 1024;
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do {
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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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udelay(10);
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} while (timeout--);
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return -EBUSY;
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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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if (!usbhs_pipe_is_dcp(pipe))
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usbhsf_fifo_barrier(priv, fifo);
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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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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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/* 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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return -EIO;
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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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ret = usbhsf_fifo_select(pipe, fifo, 1);
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if (ret < 0) {
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dev_err(dev, "%s() faile\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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usbhsf_fifo_clear(pipe, fifo);
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usbhsf_send_terminator(pipe, fifo);
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usbhsf_fifo_unselect(pipe, fifo);
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usbhsf_tx_irq_ctrl(pipe, 1);
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usbhs_pipe_enable(pipe);
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return ret;
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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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usbhs_pipe_disable(pipe);
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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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usbhs_pipe_sequence_data1(pipe); /* DATA1 */
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usbhsf_fifo_clear(pipe, fifo);
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usbhsf_fifo_unselect(pipe, fifo);
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usbhsf_rx_irq_ctrl(pipe, 1);
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usbhs_pipe_enable(pipe);
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return ret;
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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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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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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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usbhs_pipe_sequence_data1(pipe); /* DATA1 */
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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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return pkt->handler->prepare(pkt, is_done);
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}
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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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*/
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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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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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/*
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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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|
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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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|
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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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|
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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;
|
|
|
|
/*
|
|
* FIXME
|
|
*
|
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* 32-bit access only
|
|
*/
|
|
if (len >= 4 && !((unsigned long)buf & 0x03)) {
|
|
iowrite32_rep(addr, buf, len / 4);
|
|
len %= 4;
|
|
buf += total_len - len;
|
|
}
|
|
|
|
/* the rest operation */
|
|
for (i = 0; i < len; i++)
|
|
iowrite8(buf[i], addr + (0x03 - (i & 0x03)));
|
|
|
|
/*
|
|
* variable update
|
|
*/
|
|
pkt->actual += total_len;
|
|
|
|
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 ? */
|
|
|
|
/*
|
|
* pipe/irq handling
|
|
*/
|
|
if (is_short)
|
|
usbhsf_send_terminator(pipe, fifo);
|
|
|
|
usbhsf_tx_irq_ctrl(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);
|
|
|
|
/*
|
|
* Transmission end
|
|
*/
|
|
if (*is_done) {
|
|
if (usbhs_pipe_is_dcp(pipe))
|
|
usbhs_dcp_control_transfer_done(pipe);
|
|
}
|
|
|
|
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);
|
|
|
|
return ret;
|
|
}
|
|
|
|
struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = {
|
|
.prepare = usbhsf_pio_try_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;
|
|
|
|
if (usbhs_pipe_is_busy(pipe))
|
|
return 0;
|
|
|
|
/*
|
|
* pipe enable to prepare packet receive
|
|
*/
|
|
|
|
usbhs_pipe_enable(pipe);
|
|
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_disable(pipe); /* disable pipe first */
|
|
}
|
|
|
|
/*
|
|
* Buffer clear if Zero-Length packet
|
|
*
|
|
* see
|
|
* "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
|
|
*/
|
|
if (0 == rcv_len) {
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
|
|
/* DMA :: D0FIFO */
|
|
fifo = usbhsf_get_d0fifo(priv);
|
|
if (usbhsf_dma_chan_get(fifo, pkt) &&
|
|
!usbhsf_fifo_is_busy(fifo))
|
|
return fifo;
|
|
|
|
/* DMA :: D1FIFO */
|
|
fifo = usbhsf_get_d1fifo(priv);
|
|
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);
|
|
}
|
|
|
|
#define usbhsf_dma_map(p) __usbhsf_dma_map_ctrl(p, 1)
|
|
#define usbhsf_dma_unmap(p) __usbhsf_dma_map_ctrl(p, 0)
|
|
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);
|
|
|
|
return info->dma_map_ctrl(pkt, map);
|
|
}
|
|
|
|
static void usbhsf_dma_complete(void *arg);
|
|
static void usbhsf_dma_prepare_tasklet(unsigned long data)
|
|
{
|
|
struct usbhs_pkt *pkt = (struct usbhs_pkt *)data;
|
|
struct usbhs_pipe *pipe = pkt->pipe;
|
|
struct usbhs_fifo *fifo = usbhs_pipe_to_fifo(pipe);
|
|
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
|
|
struct scatterlist sg;
|
|
struct dma_async_tx_descriptor *desc;
|
|
struct dma_chan *chan = usbhsf_dma_chan_get(fifo, pkt);
|
|
struct device *dev = usbhs_priv_to_dev(priv);
|
|
enum dma_data_direction dir;
|
|
dma_cookie_t cookie;
|
|
|
|
dir = usbhs_pipe_is_dir_in(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
|
|
|
|
sg_init_table(&sg, 1);
|
|
sg_set_page(&sg, virt_to_page(pkt->dma),
|
|
pkt->length, offset_in_page(pkt->dma));
|
|
sg_dma_address(&sg) = pkt->dma + pkt->actual;
|
|
sg_dma_len(&sg) = pkt->trans;
|
|
|
|
desc = chan->device->device_prep_slave_sg(chan, &sg, 1, dir,
|
|
DMA_PREP_INTERRUPT |
|
|
DMA_CTRL_ACK);
|
|
if (!desc)
|
|
return;
|
|
|
|
desc->callback = usbhsf_dma_complete;
|
|
desc->callback_param = pipe;
|
|
|
|
cookie = desc->tx_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);
|
|
|
|
usbhsf_dma_start(pipe, fifo);
|
|
dma_async_issue_pending(chan);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
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_is_dcp(pipe))
|
|
goto usbhsf_pio_prepare_push;
|
|
|
|
if (len % 4) /* 32bit alignment */
|
|
goto usbhsf_pio_prepare_push;
|
|
|
|
if ((*(u32 *) pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
|
|
goto usbhsf_pio_prepare_push;
|
|
|
|
/* get enable DMA fifo */
|
|
fifo = usbhsf_get_dma_fifo(priv, pkt);
|
|
if (!fifo)
|
|
goto usbhsf_pio_prepare_push;
|
|
|
|
if (usbhsf_dma_map(pkt) < 0)
|
|
goto usbhsf_pio_prepare_push;
|
|
|
|
ret = usbhsf_fifo_select(pipe, fifo, 0);
|
|
if (ret < 0)
|
|
goto usbhsf_pio_prepare_push_unmap;
|
|
|
|
pkt->trans = len;
|
|
|
|
tasklet_init(&fifo->tasklet,
|
|
usbhsf_dma_prepare_tasklet,
|
|
(unsigned long)pkt);
|
|
|
|
tasklet_schedule(&fifo->tasklet);
|
|
|
|
return 0;
|
|
|
|
usbhsf_pio_prepare_push_unmap:
|
|
usbhsf_dma_unmap(pkt);
|
|
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;
|
|
|
|
pkt->actual = pkt->trans;
|
|
|
|
*is_done = !pkt->zero; /* send zero packet ? */
|
|
|
|
usbhsf_dma_stop(pipe, pipe->fifo);
|
|
usbhsf_dma_unmap(pkt);
|
|
usbhsf_fifo_unselect(pipe, pipe->fifo);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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_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 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 ((*(u32 *) 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 % 4) /* 32bit 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;
|
|
|
|
tasklet_init(&fifo->tasklet,
|
|
usbhsf_dma_prepare_tasklet,
|
|
(unsigned long)pkt);
|
|
|
|
tasklet_schedule(&fifo->tasklet);
|
|
|
|
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_pop_done(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;
|
|
} else {
|
|
/* re-enable */
|
|
usbhsf_prepare_pop(pkt, is_done);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = {
|
|
.prepare = usbhsf_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->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(struct usbhs_priv *priv,
|
|
struct usbhs_fifo *fifo)
|
|
{
|
|
struct device *dev = usbhs_priv_to_dev(priv);
|
|
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);
|
|
|
|
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)
|
|
{
|
|
struct usbhs_pipe *pipe = arg;
|
|
struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
|
|
struct device *dev = usbhs_priv_to_dev(priv);
|
|
int ret;
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* 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 *d0fifo = usbhsf_get_d0fifo(priv);
|
|
struct usbhs_fifo *d1fifo = usbhsf_get_d1fifo(priv);
|
|
|
|
mod->irq_empty = usbhsf_irq_empty;
|
|
mod->irq_ready = usbhsf_irq_ready;
|
|
mod->irq_bempsts = 0;
|
|
mod->irq_brdysts = 0;
|
|
|
|
cfifo->pipe = NULL;
|
|
cfifo->tx_chan = NULL;
|
|
cfifo->rx_chan = NULL;
|
|
|
|
d0fifo->pipe = NULL;
|
|
d0fifo->tx_chan = NULL;
|
|
d0fifo->rx_chan = NULL;
|
|
|
|
d1fifo->pipe = NULL;
|
|
d1fifo->tx_chan = NULL;
|
|
d1fifo->rx_chan = NULL;
|
|
|
|
usbhsf_dma_init(priv, usbhsf_get_d0fifo(priv));
|
|
usbhsf_dma_init(priv, usbhsf_get_d1fifo(priv));
|
|
}
|
|
|
|
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;
|
|
|
|
usbhsf_dma_quit(priv, usbhsf_get_d0fifo(priv));
|
|
usbhsf_dma_quit(priv, usbhsf_get_d1fifo(priv));
|
|
}
|
|
|
|
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;
|
|
|
|
/* D0FIFO */
|
|
fifo = usbhsf_get_d0fifo(priv);
|
|
fifo->name = "D0FIFO";
|
|
fifo->port = D0FIFO;
|
|
fifo->sel = D0FIFOSEL;
|
|
fifo->ctr = D0FIFOCTR;
|
|
fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d0_tx_id);
|
|
fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d0_rx_id);
|
|
|
|
/* D1FIFO */
|
|
fifo = usbhsf_get_d1fifo(priv);
|
|
fifo->name = "D1FIFO";
|
|
fifo->port = D1FIFO;
|
|
fifo->sel = D1FIFOSEL;
|
|
fifo->ctr = D1FIFOCTR;
|
|
fifo->tx_slave.slave_id = usbhs_get_dparam(priv, d1_tx_id);
|
|
fifo->rx_slave.slave_id = usbhs_get_dparam(priv, d1_rx_id);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void usbhs_fifo_remove(struct usbhs_priv *priv)
|
|
{
|
|
}
|