#include "./pipe.h"
#define usbhsf_get_cfifo(p) (&((p)->fifo_info.cfifo))
+#define usbhsf_get_d0fifo(p) (&((p)->fifo_info.d0fifo))
+#define usbhsf_get_d1fifo(p) (&((p)->fifo_info.d1fifo))
#define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */
void usbhs_pkt_init(struct usbhs_pkt *pkt)
{
+ pkt->dma = DMA_ADDR_INVALID;
INIT_LIST_HEAD(&pkt->node);
}
case USBHSF_PKT_TRY_RUN:
func = pkt->handler->try_run;
break;
+ case USBHSF_PKT_DMA_DONE:
+ func = pkt->handler->dma_done;
+ break;
default:
dev_err(dev, "unknown pkt hander\n");
goto __usbhs_pkt_handler_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);
+}
+
+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;
+
+ /* 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,
+};
+
+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;
+
+ 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_info(dev, "enable DMAEngine (%s%s%s)\n",
+ fifo->name,
+ fifo->tx_chan ? "[TX]" : " ",
+ fifo->rx_chan ? "[RX]" : " ");
+}
+
/*
* irq functions
*/
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 = usbhs_pkt_dmadone(pipe);
+ if (ret < 0)
+ dev_err(dev, "dma_complete run_error %d : %d\n",
+ usbhs_pipe_number(pipe), ret);
+}
+
/*
* fifo init
*/
{
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_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)
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)
/* 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;
}
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blobdiff