diff options
Diffstat (limited to 'src/soc/intel/quark/ehci.c')
| -rw-r--r-- | src/soc/intel/quark/ehci.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/soc/intel/quark/ehci.c b/src/soc/intel/quark/ehci.c index 460ef23a79..ed9112ca10 100644 --- a/src/soc/intel/quark/ehci.c +++ b/src/soc/intel/quark/ehci.c @@ -24,12 +24,25 @@ #define USB2_PLL2 0x7F03 #define USB2_COMPBG 0x7F04 +/* EHCI Packet Buffer OUT/IN Thresholds, values in number of DWORDs */ +#define EHCI_OUT_THRESHOLD_VALUE 0x7f +#define EHCI_IN_THRESHOLD_VALUE 0x7f + /* In order to configure the USB PHY to use clk120 (ickusbcoreclk) as PLL * reference clock and Port2 as a USB device port, the following sequence must * be followed */ static const struct reg_script init_script[] = { + /* Set packet buffer OUT/IN thresholds */ + REG_MMIO_RMW32(R_IOH_EHCI_INSNREG01, + ~(B_IOH_EHCI_INSNREG01_OUT_THRESHOLD_MASK + | B_IOH_EHCI_INSNREG01_IN_THRESHOLD_MASK), + (EHCI_OUT_THRESHOLD_VALUE + << B_IOH_EHCI_INSNREG01_OUT_THRESHOLD_BP) + | (EHCI_IN_THRESHOLD_VALUE + << B_IOH_EHCI_INSNREG01_IN_THRESHOLD_BP)), + /* Sighting #4930631 PDNRESCFG [8:7] of USB2_GLOBAL_PORT = 11b. * For port 0 & 1 as host and port 2 as device. */ |