diff options
| author | Nico Huber <nico.huber@secunet.com> | 2012-05-21 14:56:21 +0200 |
|---|---|---|
| committer | Patrick Georgi <patrick@georgi-clan.de> | 2012-06-01 12:22:08 +0200 |
| commit | 5c4e7aa9e5914293877ef98e007d46732666cfaf (patch) | |
| tree | d583e5d510fdc4f341521adcf0362138cb6c50dd /payloads/libpayload/drivers | |
| parent | 5f595cb6ebd8edddb1e253353753bf1c5433395e (diff) | |
libpayload: Correct port power settings for EHCI root hub
Enable power on EHCI root hub ports only if the controller supports it.
Wait 20ms for the power to become stable.
Change-Id: I8897756ed2bfcb88408fe5e9f9e3f8af5dd900ac
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: http://review.coreboot.org/1078
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Diffstat (limited to 'payloads/libpayload/drivers')
| -rw-r--r-- | payloads/libpayload/drivers/usb/ehci_private.h | 1 | ||||
| -rw-r--r-- | payloads/libpayload/drivers/usb/ehci_rh.c | 13 |
2 files changed, 13 insertions, 1 deletions
diff --git a/payloads/libpayload/drivers/usb/ehci_private.h b/payloads/libpayload/drivers/usb/ehci_private.h index 6fa5f0344d..8ac15b3093 100644 --- a/payloads/libpayload/drivers/usb/ehci_private.h +++ b/payloads/libpayload/drivers/usb/ehci_private.h @@ -49,6 +49,7 @@ typedef volatile u32 portsc_t; typedef volatile struct { #define HCS_NPORTS_MASK 0xf +#define HCS_PORT_POWER_CONTROL 0x10 u8 caplength; u8 res1; u16 hciversion; diff --git a/payloads/libpayload/drivers/usb/ehci_rh.c b/payloads/libpayload/drivers/usb/ehci_rh.c index dd073a3b99..d84069e613 100644 --- a/payloads/libpayload/drivers/usb/ehci_rh.c +++ b/payloads/libpayload/drivers/usb/ehci_rh.c @@ -137,10 +137,21 @@ ehci_rh_init (usbdev_t *dev) debug("root hub has %x ports\n", RH_INST(dev)->n_ports); + /* If the host controller has port power control, enable power on + * all ports and wait 20ms. + */ + if (EHCI_INST(dev->controller)->capabilities->hcsparams + & HCS_PORT_POWER_CONTROL) { + debug("host controller has port power control, " + "giving power to all ports.\n"); + for (i=0; i < RH_INST(dev)->n_ports; i++) + RH_INST(dev)->ports[i] |= P_PP; + } + mdelay(20); // ehci spec 2.3.9 + RH_INST(dev)->devices = malloc(RH_INST(dev)->n_ports * sizeof(int)); for (i=0; i < RH_INST(dev)->n_ports; i++) { RH_INST(dev)->devices[i] = -1; - RH_INST(dev)->ports[i] |= P_PP; ehci_rh_scanport(dev, i); } |