mail archive of the barebox mailing list
 help / color / mirror / Atom feed
From: Jules Maselbas <jmaselbas@kalray.eu>
To: Barebox List <barebox@lists.infradead.org>
Cc: Jules Maselbas <jmaselbas@kalray.eu>
Subject: [PATCH v3 10/14] usb: dwc2: Add function to flush tx fifo
Date: Tue, 21 Jul 2020 14:05:56 +0200	[thread overview]
Message-ID: <20200721120600.15114-11-jmaselbas@kalray.eu> (raw)
In-Reply-To: <20200721120600.15114-1-jmaselbas@kalray.eu>

Signed-off-by: Jules Maselbas <jmaselbas@kalray.eu>
---
 drivers/usb/dwc2/core.c | 33 +++++++++++++++++++++++++++++++++
 drivers/usb/dwc2/dwc2.h |  1 +
 2 files changed, 34 insertions(+)

diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index 6e8d30c22..a8693097d 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -294,6 +294,39 @@ void dwc2_flush_all_fifo(struct dwc2 *dwc2)
 	udelay(1);
 }
 
+/**
+ * dwc2_flush_tx_fifo() - Flushes a Tx FIFO
+ *
+ * @hsotg: Programming view of DWC_otg controller
+ * @idx: The fifo index (0..15)
+ */
+void dwc2_flush_tx_fifo(struct dwc2 *dwc2, const int idx)
+{
+	u32 greset;
+
+	if (idx > 15)
+		return;
+
+	dwc2_dbg(dwc2, "Flush Tx FIFO %d\n", idx);
+
+	/* Wait for AHB master IDLE state */
+	if (dwc2_wait_bit_set(dwc2, GRSTCTL, GRSTCTL_AHBIDLE, 10000)) {
+		dwc2_warn(dwc2, "%s: Timeout waiting for AHB Idle\n", __func__);
+		return;
+	}
+
+	greset = GRSTCTL_TXFFLSH;
+	greset |= GRSTCTL_TXFNUM(idx) & GRSTCTL_TXFNUM_MASK;
+	dwc2_writel(dwc2, greset, GRSTCTL);
+
+	if (dwc2_wait_bit_clear(dwc2, GRSTCTL, GRSTCTL_TXFFLSH, 10000))
+		dwc2_warn(dwc2, "%s: Timeout flushing tx fifo (GRSTCTL=%08x)\n",
+			 __func__, dwc2_readl(dwc2, GRSTCTL));
+
+	/* Wait for at least 3 PHY Clocks */
+	udelay(1);
+}
+
 static int dwc2_fs_phy_init(struct dwc2 *dwc2, bool select_phy)
 {
 	u32 usbcfg, ggpio, i2cctl;
diff --git a/drivers/usb/dwc2/dwc2.h b/drivers/usb/dwc2/dwc2.h
index c10385475..f620175df 100644
--- a/drivers/usb/dwc2/dwc2.h
+++ b/drivers/usb/dwc2/dwc2.h
@@ -17,6 +17,7 @@ void dwc2_get_hwparams(struct dwc2 *dwc2);
 
 void dwc2_init_fs_ls_pclk_sel(struct dwc2 *dwc2);
 void dwc2_flush_all_fifo(struct dwc2 *dwc2);
+void dwc2_flush_tx_fifo(struct dwc2 *dwc2, const int idx);
 
 int dwc2_phy_init(struct dwc2 *dwc2, bool select_phy);
 int dwc2_gahbcfg_init(struct dwc2 *dwc2);
-- 
2.17.1


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

  parent reply	other threads:[~2020-07-21 12:06 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-21 12:05 [PATCH v3 00/14] usb: dwc2: Add host and gadget driver Jules Maselbas
2020-07-21 12:05 ` [PATCH v3 01/14] Revert "usb: Add dwc2 host driver" Jules Maselbas
2020-07-21 12:05 ` [PATCH v3 02/14] usb: dwc2: Add host controller driver Jules Maselbas
2020-07-22  6:36   ` Ahmad Fatoum
2020-07-22  9:12     ` Jules Maselbas
2020-07-22  9:18       ` Ahmad Fatoum
2020-07-22  9:21         ` Jules Maselbas
2020-08-10 20:26   ` Sascha Hauer
2020-07-21 12:05 ` [PATCH v3 03/14] usb: dwc2: host: Read dr_mode from device tree Jules Maselbas
2020-07-21 12:05 ` [PATCH v3 04/14] usb: dwc2: Rework roothub interface Jules Maselbas
2020-07-21 12:05 ` [PATCH v3 05/14] usb: dwc2: Rework timeout Jules Maselbas
2020-07-21 12:05 ` [PATCH v3 06/14] usb: dwc2: host: Handle dma mapping errors Jules Maselbas
2020-07-21 12:05 ` [PATCH v3 07/14] usb: dwc2: host: Dynamic fifo size support from Linux Jules Maselbas
2020-07-21 12:05 ` [PATCH v3 08/14] usb: dwc2: host: Fix toggle reset Jules Maselbas
2020-07-21 12:05 ` [PATCH v3 09/14] usb: dwc2: host: Rewrite dwc2_hc_init Jules Maselbas
2020-07-21 12:05 ` Jules Maselbas [this message]
2020-07-21 12:05 ` [PATCH v3 11/14] usb: dwc2: Add structure for gadget driver Jules Maselbas
2020-07-21 12:05 ` [PATCH v3 12/14] usb: dwc2: Add " Jules Maselbas
2020-07-21 12:05 ` [PATCH v3 13/14] usb: dwc2: Use register_otg_device Jules Maselbas
2020-07-21 12:06 ` [PATCH v3 14/14] usb: dwc2: Add ulpi phy function Jules Maselbas
2020-08-10 20:34   ` Sascha Hauer
2020-08-11  9:31     ` Jules Maselbas
2020-08-10 20:23 ` [PATCH v3 00/14] usb: dwc2: Add host and gadget driver Sascha Hauer

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200721120600.15114-11-jmaselbas@kalray.eu \
    --to=jmaselbas@kalray.eu \
    --cc=barebox@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox