[U-Boot] [PATCH 12/16] usb: dwc2_udc_otg: Add tx_fifo_sz array support

[Patrick Delaunay]

From: Patrice Chotard <patrice.chotard at st.com>

All TX fifo size can be different, add tx_fifo_sz_array[]
into dwc2_plat_otg_data to be able to set them.

tx_fifo_sz_array[] is 17 Bytes long and can contains max 16
tx fifo size (synopsys IP supports max 16 IN endpoints).
First entry of tx_fifo_sz_array[] is the number of valid
fifo size the array contains.

In case of tx_fifo_sz_array[] doesn't contains the same
number of element than max hardware endpoint, display
a warning message.

Compatibility with board which doesn't use tx_fifo_sz_array[]
(Rockchip rk322x/rk3128/rv1108/rk3288/rk3036) is kept.

Signed-off-by: Patrice Chotard <patrice.chotard at st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
---

 drivers/usb/gadget/dwc2_udc_otg.c | 14 ++++++++++++--
 include/usb/dwc2_udc.h            |  3 +++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/gadget/dwc2_udc_otg.c b/drivers/usb/gadget/dwc2_udc_otg.c
index 5c7d131..106dec5 100644
--- a/drivers/usb/gadget/dwc2_udc_otg.c
+++ b/drivers/usb/gadget/dwc2_udc_otg.c
@@ -457,6 +457,7 @@ static void reconfig_usbd(struct dwc2_udc *dev)
 	uint32_t dflt_gusbcfg;
 	uint32_t rx_fifo_sz, tx_fifo_sz, np_tx_fifo_sz;
 	u32 max_hw_ep;
+	int pdata_hw_ep;
 
 	debug("Reseting OTG controller\n");
 
@@ -542,11 +543,20 @@ static void reconfig_usbd(struct dwc2_udc *dev)
 	/* retrieve the number of IN Endpoints (excluding ep0) */
 	max_hw_ep = (readl(&reg->ghwcfg4) & GHWCFG4_NUM_IN_EPS_MASK) >>
 		    GHWCFG4_NUM_IN_EPS_SHIFT;
+	pdata_hw_ep = dev->pdata->tx_fifo_sz_nb;
+
+	/* tx_fifo_sz_nb should equal to number of IN Endpoint */
+	if (pdata_hw_ep && max_hw_ep != pdata_hw_ep)
+		pr_warn("Got %d hw endpoint but %d tx-fifo-size in array !!\n",
+			max_hw_ep, pdata_hw_ep);
+
+	for (i = 0; i < max_hw_ep; i++) {
+		if (pdata_hw_ep)
+			tx_fifo_sz = dev->pdata->tx_fifo_sz_array[i];
 
-	for (i = 0; i < max_hw_ep; i++)
 		writel((rx_fifo_sz + np_tx_fifo_sz + (tx_fifo_sz * i)) |
 			tx_fifo_sz << 16, &reg->dieptxf[i]);
-
+	}
 	/* Flush the RX FIFO */
 	writel(RX_FIFO_FLUSH, &reg->grstctl);
 	while (readl(&reg->grstctl) & RX_FIFO_FLUSH)
diff --git a/include/usb/dwc2_udc.h b/include/usb/dwc2_udc.h
index 8a426b6..369f6fb 100644
--- a/include/usb/dwc2_udc.h
+++ b/include/usb/dwc2_udc.h
@@ -9,6 +9,7 @@
 #define __DWC2_USB_GADGET
 
 #define PHY0_SLEEP              (1 << 5)
+#define DWC2_MAX_HW_ENDPOINTS	16
 
 struct dwc2_plat_otg_data {
 	void		*priv;
@@ -22,6 +23,8 @@ struct dwc2_plat_otg_data {
 	unsigned int	rx_fifo_sz;
 	unsigned int	np_tx_fifo_sz;
 	unsigned int	tx_fifo_sz;
+	unsigned int	tx_fifo_sz_array[DWC2_MAX_HW_ENDPOINTS];
+	unsigned char   tx_fifo_sz_nb;
 	bool		force_b_session_valid;
 };
 
-- 
2.7.4