[U-Boot] [PATCH v4 2/4] usb: dwc2-otg: adjust fifo size via platform data

[Ziyuan Xu]

From: Xu Ziyuan <xzy...@rock-chips.com>

The total FIFO size of some SoCs may be different from the existen, this
patch supports fifo size setting from platform data.

Signed-off-by: Ziyuan Xu <xzy...@rock-chips.com>

---

Changes in v4:
- Rework fifo size getting and setting
- Update commit message

Changes in v3: None
Changes in v2:
- Update detailed commit message
- Modify the macro's values

 drivers/usb/gadget/dwc2_udc_otg.c      | 22 ++++++++++++++++------
 drivers/usb/gadget/dwc2_udc_otg_regs.h |  6 +++---
 include/usb/dwc2_udc.h                 |  3 +++
 3 files changed, 22 insertions(+), 9 deletions(-)

diff --git a/drivers/usb/gadget/dwc2_udc_otg.c 
b/drivers/usb/gadget/dwc2_udc_otg.c
index a23278d..029927f 100644
--- a/drivers/usb/gadget/dwc2_udc_otg.c
+++ b/drivers/usb/gadget/dwc2_udc_otg.c
@@ -403,6 +403,7 @@ static void reconfig_usbd(struct dwc2_udc *dev)
        int i;
        unsigned int uTemp = writel(CORE_SOFT_RESET, &reg->grstctl);
        uint32_t dflt_gusbcfg;
+       uint32_t rx_fifo_sz, tx_fifo_sz, np_tx_fifo_sz;
 
        debug("Reseting OTG controller\n");
 
@@ -467,18 +468,27 @@ static void reconfig_usbd(struct dwc2_udc *dev)
        /* 10. Unmask device IN EP common interrupts*/
        writel(DIEPMSK_INIT, &reg->diepmsk);
 
+       rx_fifo_sz = RX_FIFO_SIZE;
+       np_tx_fifo_sz = NPTX_FIFO_SIZE;
+       tx_fifo_sz = PTX_FIFO_SIZE;
+
+       if (dev->pdata->rx_fifo_sz)
+               rx_fifo_sz = dev->pdata->rx_fifo_sz;
+       if (dev->pdata->np_tx_fifo_sz)
+               np_tx_fifo_sz = dev->pdata->np_tx_fifo_sz;
+       if (dev->pdata->tx_fifo_sz)
+               tx_fifo_sz = dev->pdata->tx_fifo_sz;
+
        /* 11. Set Rx FIFO Size (in 32-bit words) */
-       writel(RX_FIFO_SIZE >> 2, &reg->grxfsiz);
+       writel(rx_fifo_sz, &reg->grxfsiz);
 
        /* 12. Set Non Periodic Tx FIFO Size */
-       writel((NPTX_FIFO_SIZE >> 2) << 16 | ((RX_FIFO_SIZE >> 2)) << 0,
+       writel((np_tx_fifo_sz << 16) | rx_fifo_sz,
               &reg->gnptxfsiz);
 
        for (i = 1; i < DWC2_MAX_HW_ENDPOINTS; i++)
-               writel((PTX_FIFO_SIZE >> 2) << 16 |
-                      ((RX_FIFO_SIZE + NPTX_FIFO_SIZE +
-                        PTX_FIFO_SIZE*(i-1)) >> 2) << 0,
-                      &reg->dieptxf[i-1]);
+               writel((rx_fifo_sz + np_tx_fifo_sz + tx_fifo_sz*(i-1)) |
+                       tx_fifo_sz << 16, &reg->dieptxf[i-1]);
 
        /* Flush the RX FIFO */
        writel(RX_FIFO_FLUSH, &reg->grstctl);
diff --git a/drivers/usb/gadget/dwc2_udc_otg_regs.h 
b/drivers/usb/gadget/dwc2_udc_otg_regs.h
index 78ec90e..c94396a 100644
--- a/drivers/usb/gadget/dwc2_udc_otg_regs.h
+++ b/drivers/usb/gadget/dwc2_udc_otg_regs.h
@@ -130,9 +130,9 @@ struct dwc2_usbotg_reg {
 #define HIGH_SPEED_CONTROL_PKT_SIZE    64
 #define HIGH_SPEED_BULK_PKT_SIZE       512
 
-#define RX_FIFO_SIZE                   (1024*4)
-#define NPTX_FIFO_SIZE                 (1024*4)
-#define PTX_FIFO_SIZE                  (1536*1)
+#define RX_FIFO_SIZE                   (1024)
+#define NPTX_FIFO_SIZE                 (1024)
+#define PTX_FIFO_SIZE                  (384)
 
 #define DEPCTL_TXFNUM_0                (0x0<<22)
 #define DEPCTL_TXFNUM_1                (0x1<<22)
diff --git a/include/usb/dwc2_udc.h b/include/usb/dwc2_udc.h
index 3ce43f8..7324d8a 100644
--- a/include/usb/dwc2_udc.h
+++ b/include/usb/dwc2_udc.h
@@ -20,6 +20,9 @@ struct dwc2_plat_otg_data {
        unsigned int    usb_phy_ctrl;
        unsigned int    usb_flags;
        unsigned int    usb_gusbcfg;
+       unsigned int    rx_fifo_sz;
+       unsigned int    np_tx_fifo_sz;
+       unsigned int    tx_fifo_sz;
 };
 
 int dwc2_udc_probe(struct dwc2_plat_otg_data *pdata);
-- 
1.9.1


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