diff options
| author | Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> | 2015-03-12 09:35:20 +0300 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2015-03-13 18:41:19 +0300 |
| commit | ab330cf3888d8e0779fa05a243d53ba9f53a7ba9 (patch) | |
| tree | 9e27ed02aeb8be7dd617004d03baabe821e398bf /drivers/usb/renesas_usbhs/common.c | |
| parent | 9b53d9af7aac09cf249d72bfbf15f08e47c4f7fe (diff) | |
| download | linux-ab330cf3888d8e0779fa05a243d53ba9f53a7ba9.tar.xz | |
usb: renesas_usbhs: add support for USB-DMAC
Some Renesas SoCs have the USB-DMAC. It is able to terminate transfers
when a short packet is received, even if less bytes than the transfer
counter size have been received. Also, it is able to send a short
packet even if the packet size is not multiples of 8bytes.
Since the previous code has used the interruption of USBHS controller
when receiving packets even if this driver has used a dmac, a lot of
interruptions has happened. This patch will reduce such interruptions.
This patch allows to use the USB-DMAC on R-Car H2 and M2.
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/renesas_usbhs/common.c')
| -rw-r--r-- | drivers/usb/renesas_usbhs/common.c | 19 |
1 files changed, 19 insertions, 0 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; } |