apm821xx: add amcc, usb-otg-405ex devicetree definition

This patch adds support for the amcc,usb-otg-405ex device
which is found in all APM82181 SoCs.
Note: The system can't use the generic "snps,dwc2" compatible
because of the special ahbcfg configuration. The default
GAHBCFG_HBSTLEN_INCR4 of snps,dwc2 can cause a system hang
when the USB and SATA is used concurrently.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

diff --git a/target/linux/apm821xx/patches-4.4/804-usb-dwc2-add-amcc-usb-otg-405ex.patch b/target/linux/apm821xx/patches-4.4/804-usb-dwc2-add-amcc-usb-otg-405ex.patch
new file mode 100644 (file)
index 0000000..e081761
--- /dev/null
+++ b/target/linux/apm821xx/patches-4.4/804-usb-dwc2-add-amcc-usb-otg-405ex.patch
@@ -0,0 +1,44 @@
+--- a/drivers/usb/dwc2/platform.c
++++ b/drivers/usb/dwc2/platform.c
+@@ -115,6 +115,37 @@ static const struct dwc2_core_params par
+       .hibernation                    = -1,
+ };
+ 
++static const struct dwc2_core_params params_amcc_dwc_otg = {
++      .otg_cap                        = DWC2_CAP_PARAM_HNP_SRP_CAPABLE,
++      .otg_ver                        = -1,
++      .dma_enable                     = -1,
++      .dma_desc_enable                = -1,
++      .speed                          = -1,
++      .enable_dynamic_fifo            = -1,
++      .en_multiple_tx_fifo            = -1,
++      .host_rx_fifo_size              = -1,
++      .host_nperio_tx_fifo_size       = -1,
++      .host_perio_tx_fifo_size        = -1,
++      .max_transfer_size              = -1,
++      .max_packet_count               = -1,
++      .host_channels                  = -1,
++      .phy_type                       = -1,
++      .phy_utmi_width                 = -1,
++      .phy_ulpi_ddr                   = -1,
++      .phy_ulpi_ext_vbus              = -1,
++      .i2c_enable                     = -1,
++      .ulpi_fs_ls                     = -1,
++      .host_support_fs_ls_low_power   = -1,
++      .host_ls_low_power_phy_clk      = -1,
++      .ts_dline                       = -1,
++      .reload_ctl                     = -1,
++      .ahbcfg                         = GAHBCFG_HBSTLEN_INCR16 <<
++                                        GAHBCFG_HBSTLEN_SHIFT,
++      .uframe_sched                   = -1,
++      .external_id_pin_ctl            = -1,
++      .hibernation                    = -1,
++};
++
+ static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)
+ {
+       struct platform_device *pdev = to_platform_device(hsotg->dev);
+@@ -309,2 +340,3 @@ static int dwc2_driver_remove(struct pla
+ static const struct of_device_id dwc2_of_match_table[] = {
++      { .compatible = "amcc,usb-otg-405ex", .data = &params_amcc_dwc_otg },
+       { .compatible = "brcm,bcm2835-usb", .data = &params_bcm2835 },