diff options
Diffstat (limited to 'arch/x86/cpu/quark')
-rw-r--r-- | arch/x86/cpu/quark/quark.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/x86/cpu/quark/quark.c b/arch/x86/cpu/quark/quark.c index dda3c7c7fce..637c370e818 100644 --- a/arch/x86/cpu/quark/quark.c +++ b/arch/x86/cpu/quark/quark.c @@ -125,6 +125,44 @@ static void quark_pcie_early_init(void) msg_port_io_write(MSG_PORT_PCIE_AFE, PCIE_RXPICTRL0_L1, pcie_cfg); } +static void quark_usb_early_init(void) +{ + u32 usb; + + /* The sequence below comes from Quark firmware writer guide */ + + usb = msg_port_alt_read(MSG_PORT_USB_AFE, USB2_GLOBAL_PORT); + usb &= ~(1 << 1); + usb |= ((1 << 6) | (1 << 7)); + msg_port_alt_write(MSG_PORT_USB_AFE, USB2_GLOBAL_PORT, usb); + + usb = msg_port_alt_read(MSG_PORT_USB_AFE, USB2_COMPBG); + usb &= ~((1 << 8) | (1 << 9)); + usb |= ((1 << 7) | (1 << 10)); + msg_port_alt_write(MSG_PORT_USB_AFE, USB2_COMPBG, usb); + + usb = msg_port_alt_read(MSG_PORT_USB_AFE, USB2_PLL2); + usb |= (1 << 29); + msg_port_alt_write(MSG_PORT_USB_AFE, USB2_PLL2, usb); + + usb = msg_port_alt_read(MSG_PORT_USB_AFE, USB2_PLL1); + usb |= (1 << 1); + msg_port_alt_write(MSG_PORT_USB_AFE, USB2_PLL1, usb); + + usb = msg_port_alt_read(MSG_PORT_USB_AFE, USB2_PLL1); + usb &= ~((1 << 3) | (1 << 4) | (1 << 5)); + usb |= (1 << 6); + msg_port_alt_write(MSG_PORT_USB_AFE, USB2_PLL1, usb); + + usb = msg_port_alt_read(MSG_PORT_USB_AFE, USB2_PLL2); + usb &= ~(1 << 29); + msg_port_alt_write(MSG_PORT_USB_AFE, USB2_PLL2, usb); + + usb = msg_port_alt_read(MSG_PORT_USB_AFE, USB2_PLL2); + usb |= (1 << 24); + msg_port_alt_write(MSG_PORT_USB_AFE, USB2_PLL2, usb); +} + static void quark_enable_legacy_seg(void) { u32 hmisc2; @@ -164,6 +202,9 @@ int arch_cpu_init(void) */ quark_pcie_early_init(); + /* Initialize USB2 PHY */ + quark_usb_early_init(); + /* Turn on legacy segments (A/B/E/F) decode to system RAM */ quark_enable_legacy_seg(); |