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| author | Bin Meng <bmeng.cn@gmail.com> | 2015-09-03 05:37:27 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-09-09 07:48:03 -0600 |
| commit | b06862b9d8ea7046287ac84589210ef16a1afc0d (patch) | |
| tree | 6abc4a806815e7fc77144043e1a351d4ea65d93e /arch/x86/cpu/quark/quark.c | |
| parent | 31b5aebd5e00af84709711d8b9a60ebaf9deeed6 (diff) | |
| download | u-boot-imx-b06862b9d8ea7046287ac84589210ef16a1afc0d.zip u-boot-imx-b06862b9d8ea7046287ac84589210ef16a1afc0d.tar.gz u-boot-imx-b06862b9d8ea7046287ac84589210ef16a1afc0d.tar.bz2 | |
x86: quark: Add USB PHY initialization support
USB PHY needs to be properly initialized per Quark firmware writer
guide, otherwise the EHCI controller on Quark SoC won't work.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/x86/cpu/quark/quark.c')
| -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 dda3c7c..637c370 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(); |