diff options
Diffstat (limited to 'drivers/usb/renesas_usbhs/fifo.c')
| -rw-r--r-- | drivers/usb/renesas_usbhs/fifo.c | 341 |
1 files changed, 256 insertions, 85 deletions
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c index a34430f55fb..4fd36530bfa 100644 --- a/drivers/usb/renesas_usbhs/fifo.c +++ b/drivers/usb/renesas_usbhs/fifo.c @@ -17,12 +17,13 @@ #include <linux/delay.h> #include <linux/io.h> #include <linux/scatterlist.h> -#include "./common.h" -#include "./pipe.h" +#include "common.h" +#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_is_cfifo(p, f) (usbhsf_get_cfifo(p) == f) #define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */ @@ -31,7 +32,6 @@ */ void usbhs_pkt_init(struct usbhs_pkt *pkt) { - pkt->dma = DMA_ADDR_INVALID; INIT_LIST_HEAD(&pkt->node); } @@ -54,35 +54,45 @@ static struct usbhs_pkt_handle usbhsf_null_handler = { }; void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt, - struct usbhs_pkt_handle *handler, - void *buf, int len, int zero) + void (*done)(struct usbhs_priv *priv, + struct usbhs_pkt *pkt), + void *buf, int len, int zero, int sequence) { struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); struct device *dev = usbhs_priv_to_dev(priv); unsigned long flags; + if (!done) { + dev_err(dev, "no done function\n"); + return; + } + /******************** spin lock ********************/ usbhs_lock(priv, flags); - if (!handler) { + if (!pipe->handler) { dev_err(dev, "no handler function\n"); - handler = &usbhsf_null_handler; + pipe->handler = &usbhsf_null_handler; } - list_del_init(&pkt->node); - list_add_tail(&pkt->node, &pipe->list); + list_move_tail(&pkt->node, &pipe->list); + /* + * each pkt must hold own handler. + * because handler might be changed by its situation. + * dma handler -> pio handler. + */ pkt->pipe = pipe; pkt->buf = buf; - pkt->handler = handler; + pkt->handler = pipe->handler; pkt->length = len; pkt->zero = zero; pkt->actual = 0; + pkt->done = done; + pkt->sequence = sequence; usbhs_unlock(priv, flags); /******************** spin unlock ******************/ - - usbhs_pkt_start(pipe); } static void __usbhsf_pkt_del(struct usbhs_pkt *pkt) @@ -95,7 +105,7 @@ static struct usbhs_pkt *__usbhsf_pkt_get(struct usbhs_pipe *pipe) if (list_empty(&pipe->list)) return NULL; - return list_entry(pipe->list.next, struct usbhs_pkt, node); + return list_first_entry(&pipe->list, struct usbhs_pkt, node); } struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt) @@ -118,10 +128,15 @@ struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt) return pkt; } -int __usbhs_pkt_handler(struct usbhs_pipe *pipe, int type) +enum { + USBHSF_PKT_PREPARE, + USBHSF_PKT_TRY_RUN, + USBHSF_PKT_DMA_DONE, +}; + +static int usbhsf_pkt_handler(struct usbhs_pipe *pipe, int type) { struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); - struct usbhs_pipe_info *info = usbhs_priv_to_pipeinfo(priv); struct usbhs_pkt *pkt; struct device *dev = usbhs_priv_to_dev(priv); int (*func)(struct usbhs_pkt *pkt, int *is_done); @@ -147,7 +162,7 @@ int __usbhs_pkt_handler(struct usbhs_pipe *pipe, int type) func = pkt->handler->dma_done; break; default: - dev_err(dev, "unknown pkt hander\n"); + dev_err(dev, "unknown pkt handler\n"); goto __usbhs_pkt_handler_end; } @@ -161,18 +176,23 @@ __usbhs_pkt_handler_end: /******************** spin unlock ******************/ if (is_done) { - info->done(pkt); + pkt->done(priv, pkt); usbhs_pkt_start(pipe); } return ret; } +void usbhs_pkt_start(struct usbhs_pipe *pipe) +{ + usbhsf_pkt_handler(pipe, USBHSF_PKT_PREPARE); +} + /* * irq enable/disable function */ -#define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, bempsts, e) -#define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, brdysts, e) +#define usbhsf_irq_empty_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_bempsts, e) +#define usbhsf_irq_ready_ctrl(p, e) usbhsf_irq_callback_ctrl(p, irq_brdysts, e) #define usbhsf_irq_callback_ctrl(pipe, status, enable) \ ({ \ struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); \ @@ -181,9 +201,9 @@ __usbhs_pkt_handler_end: if (!mod) \ return; \ if (enable) \ - mod->irq_##status |= status; \ + mod->status |= status; \ else \ - mod->irq_##status &= ~status; \ + mod->status &= ~status; \ usbhs_irq_callback_update(priv, mod); \ }) @@ -276,11 +296,18 @@ static int usbhsf_fifo_select(struct usbhs_pipe *pipe, usbhsf_fifo_is_busy(fifo)) return -EBUSY; - if (usbhs_pipe_is_dcp(pipe)) + if (usbhs_pipe_is_dcp(pipe)) { base |= (1 == write) << 5; /* ISEL */ + if (usbhs_mod_is_host(priv)) + usbhs_dcp_dir_for_host(pipe, write); + } + /* "base" will be used below */ - usbhs_write(priv, fifo->sel, base | MBW_32); + if (usbhs_get_dparam(priv, has_sudmac) && !usbhsf_is_cfifo(priv, fifo)) + usbhs_write(priv, fifo->sel, base); + else + usbhs_write(priv, fifo->sel, base | MBW_32); /* check ISEL and CURPIPE value */ while (timeout--) { @@ -297,6 +324,151 @@ static int usbhsf_fifo_select(struct usbhs_pipe *pipe, } /* + * DCP status stage + */ +static int usbhs_dcp_dir_switch_to_write(struct usbhs_pkt *pkt, int *is_done) +{ + struct usbhs_pipe *pipe = pkt->pipe; + struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); + struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ + struct device *dev = usbhs_priv_to_dev(priv); + int ret; + + usbhs_pipe_disable(pipe); + + ret = usbhsf_fifo_select(pipe, fifo, 1); + if (ret < 0) { + dev_err(dev, "%s() faile\n", __func__); + return ret; + } + + usbhs_pipe_sequence_data1(pipe); /* DATA1 */ + + usbhsf_fifo_clear(pipe, fifo); + usbhsf_send_terminator(pipe, fifo); + + usbhsf_fifo_unselect(pipe, fifo); + + usbhsf_tx_irq_ctrl(pipe, 1); + usbhs_pipe_enable(pipe); + + return ret; +} + +static int usbhs_dcp_dir_switch_to_read(struct usbhs_pkt *pkt, int *is_done) +{ + struct usbhs_pipe *pipe = pkt->pipe; + struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); + struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); /* CFIFO */ + struct device *dev = usbhs_priv_to_dev(priv); + int ret; + + usbhs_pipe_disable(pipe); + + ret = usbhsf_fifo_select(pipe, fifo, 0); + if (ret < 0) { + dev_err(dev, "%s() fail\n", __func__); + return ret; + } + + usbhs_pipe_sequence_data1(pipe); /* DATA1 */ + usbhsf_fifo_clear(pipe, fifo); + + usbhsf_fifo_unselect(pipe, fifo); + + usbhsf_rx_irq_ctrl(pipe, 1); + usbhs_pipe_enable(pipe); + + return ret; + +} + +static int usbhs_dcp_dir_switch_done(struct usbhs_pkt *pkt, int *is_done) +{ + struct usbhs_pipe *pipe = pkt->pipe; + + if (pkt->handler == &usbhs_dcp_status_stage_in_handler) + usbhsf_tx_irq_ctrl(pipe, 0); + else + usbhsf_rx_irq_ctrl(pipe, 0); + + pkt->actual = pkt->length; + *is_done = 1; + + return 0; +} + +struct usbhs_pkt_handle usbhs_dcp_status_stage_in_handler = { + .prepare = usbhs_dcp_dir_switch_to_write, + .try_run = usbhs_dcp_dir_switch_done, +}; + +struct usbhs_pkt_handle usbhs_dcp_status_stage_out_handler = { + .prepare = usbhs_dcp_dir_switch_to_read, + .try_run = usbhs_dcp_dir_switch_done, +}; + +/* + * DCP data stage (push) + */ +static int usbhsf_dcp_data_stage_try_push(struct usbhs_pkt *pkt, int *is_done) +{ + struct usbhs_pipe *pipe = pkt->pipe; + + usbhs_pipe_sequence_data1(pipe); /* DATA1 */ + + /* + * change handler to PIO push + */ + pkt->handler = &usbhs_fifo_pio_push_handler; + + return pkt->handler->prepare(pkt, is_done); +} + +struct usbhs_pkt_handle usbhs_dcp_data_stage_out_handler = { + .prepare = usbhsf_dcp_data_stage_try_push, +}; + +/* + * DCP data stage (pop) + */ +static int usbhsf_dcp_data_stage_prepare_pop(struct usbhs_pkt *pkt, + int *is_done) +{ + struct usbhs_pipe *pipe = pkt->pipe; + struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe); + struct usbhs_fifo *fifo = usbhsf_get_cfifo(priv); + + if (usbhs_pipe_is_busy(pipe)) + return 0; + + /* + * prepare pop for DCP should + * - change DCP direction, + * - clear fifo + * - DATA1 + */ + usbhs_pipe_disable(pipe); + + usbhs_pipe_sequence_data1(pipe); /* DATA1 */ + + usbhsf_fifo_select(pipe, fifo, 0); + usbhsf_fifo_clear(pipe, fifo); + usbhsf_fifo_unselect(pipe, fifo); + + /* + * change handler to PIO pop + */ + pkt->handler = &usbhs_fifo_pio_pop_handler; + + return pkt->handler->prepare(pkt, is_done); +} + +struct usbhs_pkt_handle usbhs_dcp_data_stage_in_handler = { + .prepare = usbhsf_dcp_data_stage_prepare_pop, +}; + +/* * PIO push handler */ static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done) @@ -312,6 +484,11 @@ static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done) int i, ret, len; int is_short; + usbhs_pipe_data_sequence(pipe, pkt->sequence); + pkt->sequence = -1; /* -1 sequence will be ignored */ + + usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length); + ret = usbhsf_fifo_select(pipe, fifo, 1); if (ret < 0) return 0; @@ -415,7 +592,10 @@ static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done) /* * pipe enable to prepare packet receive */ + usbhs_pipe_data_sequence(pipe, pkt->sequence); + pkt->sequence = -1; /* -1 sequence will be ignored */ + usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->length); usbhs_pipe_enable(pipe); usbhsf_rx_irq_ctrl(pipe, 1); @@ -452,12 +632,27 @@ static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done) 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) { + pkt->zero = 1; usbhsf_fifo_clear(pipe, fifo); goto usbhs_fifo_read_end; } @@ -481,20 +676,19 @@ static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done) buf[i] = (data >> ((i & 0x03) * 8)) & 0xff; } - pkt->actual += total_len; - usbhs_fifo_read_end: - 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); - } - dev_dbg(dev, " recv %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); + } + usbhs_fifo_read_busy: usbhsf_fifo_unselect(pipe, fifo); @@ -581,38 +775,29 @@ static int __usbhsf_dma_map_ctrl(struct usbhs_pkt *pkt, int map) } static void usbhsf_dma_complete(void *arg); -static void usbhsf_dma_prepare_tasklet(unsigned long data) +static void xfer_work(struct work_struct *work) { - struct usbhs_pkt *pkt = (struct usbhs_pkt *)data; + struct usbhs_pkt *pkt = container_of(work, struct usbhs_pkt, work); 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; + enum dma_transfer_direction dir; - 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; + dir = usbhs_pipe_is_dir_in(pipe) ? DMA_DEV_TO_MEM : DMA_MEM_TO_DEV; - desc = chan->device->device_prep_slave_sg(chan, &sg, 1, dir, - DMA_PREP_INTERRUPT | - DMA_CTRL_ACK); + desc = dmaengine_prep_slave_single(chan, pkt->dma + pkt->actual, + pkt->trans, 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) { + if (dmaengine_submit(desc) < 0) { dev_err(dev, "Failed to submit dma descriptor\n"); return; } @@ -620,6 +805,8 @@ static void usbhsf_dma_prepare_tasklet(unsigned long data) dev_dbg(dev, " %s %d (%d/ %d)\n", fifo->name, usbhs_pipe_number(pipe), pkt->length, pkt->zero); + usbhs_pipe_set_trans_count_if_bulk(pipe, pkt->trans); + usbhs_pipe_enable(pipe); usbhsf_dma_start(pipe, fifo); dma_async_issue_pending(chan); } @@ -643,10 +830,10 @@ static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done) usbhs_pipe_is_dcp(pipe)) goto usbhsf_pio_prepare_push; - if (len % 4) /* 32bit alignment */ + if (len & 0x7) /* 8byte alignment */ goto usbhsf_pio_prepare_push; - if (((u32)pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */ + if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */ goto usbhsf_pio_prepare_push; /* get enable DMA fifo */ @@ -663,11 +850,8 @@ static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done) pkt->trans = len; - tasklet_init(&fifo->tasklet, - usbhsf_dma_prepare_tasklet, - (unsigned long)pkt); - - tasklet_schedule(&fifo->tasklet); + INIT_WORK(&pkt->work, xfer_work); + schedule_work(&pkt->work); return 0; @@ -723,7 +907,7 @@ static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done) if (!fifo) goto usbhsf_pio_prepare_pop; - if (((u32)pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */ + if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */ goto usbhsf_pio_prepare_pop; ret = usbhsf_fifo_select(pipe, fifo, 0); @@ -733,7 +917,7 @@ static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done) /* 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 */ + if (len & 0x7) /* 8byte alignment */ goto usbhsf_pio_prepare_pop_unselect; if (len < usbhs_get_dparam(priv, pio_dma_border)) @@ -757,11 +941,8 @@ static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done) pkt->trans = len; - tasklet_init(&fifo->tasklet, - usbhsf_dma_prepare_tasklet, - (unsigned long)pkt); - - tasklet_schedule(&fifo->tasklet); + INIT_WORK(&pkt->work, xfer_work); + schedule_work(&pkt->work); return 0; @@ -817,7 +998,7 @@ static bool usbhsf_dma_filter(struct dma_chan *chan, void *param) * * usbhs doesn't recognize id = 0 as valid DMA */ - if (0 == slave->slave_id) + if (0 == slave->shdma_slave.slave_id) return false; chan->private = slave; @@ -884,7 +1065,7 @@ static int usbhsf_irq_empty(struct usbhs_priv *priv, if (!(irq_state->bempsts & (1 << i))) continue; - ret = usbhs_pkt_run(pipe); + ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); if (ret < 0) dev_err(dev, "irq_empty run_error %d : %d\n", i, ret); } @@ -914,7 +1095,7 @@ static int usbhsf_irq_ready(struct usbhs_priv *priv, if (!(irq_state->brdysts & (1 << i))) continue; - ret = usbhs_pkt_run(pipe); + ret = usbhsf_pkt_handler(pipe, USBHSF_PKT_TRY_RUN); if (ret < 0) dev_err(dev, "irq_ready run_error %d : %d\n", i, ret); } @@ -929,7 +1110,7 @@ static void usbhsf_dma_complete(void *arg) struct device *dev = usbhs_priv_to_dev(priv); int ret; - ret = usbhs_pkt_dmadone(pipe); + 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); @@ -951,19 +1132,8 @@ void usbhs_fifo_init(struct usbhs_priv *priv) 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) @@ -974,9 +1144,6 @@ 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) @@ -996,8 +1163,9 @@ int usbhs_fifo_probe(struct usbhs_priv *priv) 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); + fifo->tx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d0_tx_id); + fifo->rx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d0_rx_id); + usbhsf_dma_init(priv, fifo); /* D1FIFO */ fifo = usbhsf_get_d1fifo(priv); @@ -1005,12 +1173,15 @@ int usbhs_fifo_probe(struct usbhs_priv *priv) 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); + fifo->tx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d1_tx_id); + fifo->rx_slave.shdma_slave.slave_id = usbhs_get_dparam(priv, d1_rx_id); + usbhsf_dma_init(priv, fifo); return 0; } void usbhs_fifo_remove(struct usbhs_priv *priv) { + usbhsf_dma_quit(priv, usbhsf_get_d0fifo(priv)); + usbhsf_dma_quit(priv, usbhsf_get_d1fifo(priv)); } |
