summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--drivers/usb/renesas_usbhs/common.c19
-rw-r--r--drivers/usb/renesas_usbhs/common.h7
-rw-r--r--drivers/usb/renesas_usbhs/fifo.c165
-rw-r--r--drivers/usb/renesas_usbhs/fifo.h1
-rw-r--r--drivers/usb/renesas_usbhs/pipe.c39
-rw-r--r--drivers/usb/renesas_usbhs/pipe.h1
-rw-r--r--include/linux/usb/renesas_usbhs.h2
7 files changed, 228 insertions, 6 deletions
diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c
index 4cf77d3c3bd2..0f7e850fd4aa 100644
--- a/drivers/usb/renesas_usbhs/common.c
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -276,6 +276,16 @@ int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
}
/*
+ * interrupt functions
+ */
+void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit)
+{
+ u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0);
+
+ usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask);
+}
+
+/*
* local functions
*/
static void usbhsc_set_buswait(struct usbhs_priv *priv)
@@ -487,6 +497,15 @@ static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
if (gpio > 0)
dparam->enable_gpio = gpio;
+ switch (dparam->type) {
+ case USBHS_TYPE_R8A7790:
+ case USBHS_TYPE_R8A7791:
+ dparam->has_usb_dmac = 1;
+ break;
+ default:
+ break;
+ }
+
return info;
}
diff --git a/drivers/usb/renesas_usbhs/common.h b/drivers/usb/renesas_usbhs/common.h
index fc96e924edc4..8c5fc12ad778 100644
--- a/drivers/usb/renesas_usbhs/common.h
+++ b/drivers/usb/renesas_usbhs/common.h
@@ -193,6 +193,7 @@ struct usbhs_priv;
#define TYPE_BULK (1 << 14)
#define TYPE_INT (2 << 14)
#define TYPE_ISO (3 << 14)
+#define BFRE (1 << 10) /* BRDY Interrupt Operation Spec. */
#define DBLB (1 << 9) /* Double Buffer Mode */
#define SHTNAK (1 << 7) /* Pipe Disable in Transfer End */
#define DIR_OUT (1 << 4) /* Transfer Direction */
@@ -216,6 +217,7 @@ struct usbhs_priv;
#define ACLRM (1 << 9) /* Buffer Auto-Clear Mode */
#define SQCLR (1 << 8) /* Toggle Bit Clear */
#define SQSET (1 << 7) /* Toggle Bit Set */
+#define SQMON (1 << 6) /* Toggle Bit Check */
#define PBUSY (1 << 5) /* Pipe Busy */
#define PID_MASK (0x3) /* Response PID */
#define PID_NAK 0
@@ -324,6 +326,11 @@ int usbhs_set_device_config(struct usbhs_priv *priv, int devnum, u16 upphub,
u16 hubport, u16 speed);
/*
+ * interrupt functions
+ */
+void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit);
+
+/*
* data
*/
struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev);
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index b737661b10a2..8597cf9cfceb 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -813,7 +813,8 @@ static void xfer_work(struct work_struct *work)
desc->callback = usbhsf_dma_complete;
desc->callback_param = pipe;
- if (dmaengine_submit(desc) < 0) {
+ pkt->cookie = dmaengine_submit(desc);
+ if (pkt->cookie < 0) {
dev_err(dev, "Failed to submit dma descriptor\n");
return;
}
@@ -838,6 +839,7 @@ static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
struct usbhs_fifo *fifo;
int len = pkt->length - pkt->actual;
int ret;
+ uintptr_t align_mask;
if (usbhs_pipe_is_busy(pipe))
return 0;
@@ -847,10 +849,14 @@ 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 & 0x7) /* 8byte alignment */
+ /* 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;
- if ((uintptr_t)(pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
+ /* 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 */
@@ -924,7 +930,85 @@ struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = {
/*
* DMA pop handler
*/
-static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
+
+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_is_dcp(pipe))
+ 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;
+
+ 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;
+
+ 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;
+ 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);
@@ -993,7 +1077,16 @@ usbhsf_pio_prepare_pop:
return pkt->handler->try_run(pkt, is_done);
}
-static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *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);
@@ -1017,8 +1110,68 @@ static int usbhsf_dma_pop_done(struct usbhs_pkt *pkt, int *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;
+ struct dma_tx_state state;
+ size_t received_size;
+ int maxp = usbhs_pipe_get_maxpacket(pipe);
+
+ dmaengine_tx_status(chan, pkt->cookie, &state);
+ received_size = pkt->length - state.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);
+
+ 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);
+}
+
struct usbhs_pkt_handle usbhs_fifo_dma_pop_handler = {
- .prepare = usbhsf_prepare_pop,
+ .prepare = usbhsf_dma_prepare_pop,
.try_run = usbhsf_dma_try_pop,
.dma_done = usbhsf_dma_pop_done
};
diff --git a/drivers/usb/renesas_usbhs/fifo.h b/drivers/usb/renesas_usbhs/fifo.h
index f07037c1185f..04d3f8abad9e 100644
--- a/drivers/usb/renesas_usbhs/fifo.h
+++ b/drivers/usb/renesas_usbhs/fifo.h
@@ -58,6 +58,7 @@ struct usbhs_pkt {
struct usbhs_pkt *pkt);
struct work_struct work;
dma_addr_t dma;
+ dma_cookie_t cookie;
void *buf;
int length;
int trans;
diff --git a/drivers/usb/renesas_usbhs/pipe.c b/drivers/usb/renesas_usbhs/pipe.c
index 007f45abe96c..4f9c3356127a 100644
--- a/drivers/usb/renesas_usbhs/pipe.c
+++ b/drivers/usb/renesas_usbhs/pipe.c
@@ -84,6 +84,17 @@ static void __usbhsp_pipe_xxx_set(struct usbhs_pipe *pipe,
usbhs_bset(priv, pipe_reg, mask, val);
}
+static u16 __usbhsp_pipe_xxx_get(struct usbhs_pipe *pipe,
+ u16 dcp_reg, u16 pipe_reg)
+{
+ struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
+
+ if (usbhs_pipe_is_dcp(pipe))
+ return usbhs_read(priv, dcp_reg);
+ else
+ return usbhs_read(priv, pipe_reg);
+}
+
/*
* DCPCFG/PIPECFG functions
*/
@@ -92,6 +103,11 @@ static void usbhsp_pipe_cfg_set(struct usbhs_pipe *pipe, u16 mask, u16 val)
__usbhsp_pipe_xxx_set(pipe, DCPCFG, PIPECFG, mask, val);
}
+static u16 usbhsp_pipe_cfg_get(struct usbhs_pipe *pipe)
+{
+ return __usbhsp_pipe_xxx_get(pipe, DCPCFG, PIPECFG);
+}
+
/*
* PIPEnTRN/PIPEnTRE functions
*/
@@ -616,6 +632,11 @@ void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
usbhsp_pipectrl_set(pipe, mask, val);
}
+static int usbhs_pipe_get_data_sequence(struct usbhs_pipe *pipe)
+{
+ return !!(usbhsp_pipectrl_get(pipe) & SQMON);
+}
+
void usbhs_pipe_clear(struct usbhs_pipe *pipe)
{
if (usbhs_pipe_is_dcp(pipe)) {
@@ -626,6 +647,24 @@ void usbhs_pipe_clear(struct usbhs_pipe *pipe)
}
}
+void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable)
+{
+ int sequence;
+
+ if (usbhs_pipe_is_dcp(pipe))
+ return;
+
+ usbhsp_pipe_select(pipe);
+ /* check if the driver needs to change the BFRE value */
+ if (!(enable ^ !!(usbhsp_pipe_cfg_get(pipe) & BFRE)))
+ return;
+
+ sequence = usbhs_pipe_get_data_sequence(pipe);
+ usbhsp_pipe_cfg_set(pipe, BFRE, enable ? BFRE : 0);
+ usbhs_pipe_clear(pipe);
+ usbhs_pipe_data_sequence(pipe, sequence);
+}
+
static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
{
struct usbhs_pipe *pos, *pipe;
diff --git a/drivers/usb/renesas_usbhs/pipe.h b/drivers/usb/renesas_usbhs/pipe.h
index d24a05972370..b0bc7b603016 100644
--- a/drivers/usb/renesas_usbhs/pipe.h
+++ b/drivers/usb/renesas_usbhs/pipe.h
@@ -97,6 +97,7 @@ void usbhs_pipe_set_trans_count_if_bulk(struct usbhs_pipe *pipe, int len);
void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo);
void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
u16 epnum, u16 maxp);
+void usbhs_pipe_config_change_bfre(struct usbhs_pipe *pipe, int enable);
#define usbhs_pipe_sequence_data0(pipe) usbhs_pipe_data_sequence(pipe, 0)
#define usbhs_pipe_sequence_data1(pipe) usbhs_pipe_data_sequence(pipe, 1)
diff --git a/include/linux/usb/renesas_usbhs.h b/include/linux/usb/renesas_usbhs.h
index 9fd9e481ea98..f06529c14141 100644
--- a/include/linux/usb/renesas_usbhs.h
+++ b/include/linux/usb/renesas_usbhs.h
@@ -165,6 +165,8 @@ struct renesas_usbhs_driver_param {
*/
u32 has_otg:1; /* for controlling PWEN/EXTLP */
u32 has_sudmac:1; /* for SUDMAC */
+ u32 has_usb_dmac:1; /* for USB-DMAC */
+#define USBHS_USB_DMAC_XFER_SIZE 32 /* hardcode the xfer size */
};
#define USBHS_TYPE_R8A7790 1