diff options
| author | Thirupathi Chippakurthy <thirupathi.chippakurthy@stericsson.com> | 2011-09-05 17:26:43 +0530 |
|---|---|---|
| committer | Philippe Langlais <philippe.langlais@stericsson.com> | 2012-05-22 11:03:07 +0200 |
| commit | 29390773a3081c76e16f9958a6ddb38b58febb09 (patch) | |
| tree | 06d5bbffb110e0b81c93b661fd26548b746d2831 | |
| parent | c5b0321065e36cde8cdc18e125901b2914369c05 (diff) | |
ux500: USB: Set the charging cur to 300mA for ABV3
In case of AB-V3, the eye diagram related issues are resolved.
So, set the device charging current to 300mA when connected to
standard host. Also, add the USB PHY tuning values to improve
the USB eye diagram
ST-Ericsson ID: 330203
ST-Ericsson Linux next: ER 330203
ST-Ericsson FOSS-OUT ID: NA
Change-Id: I7cd49289ce7e1a6d88263198e7b1258c923c1282
Signed-off-by: <thirupathi.chippakurthy@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/30031
Reviewed-by: Praveena NADAHALLY <praveen.nadahally@stericsson.com>
| -rw-r--r-- | drivers/usb/otg/ab8500-usb.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/drivers/usb/otg/ab8500-usb.c b/drivers/usb/otg/ab8500-usb.c index a09fb341cb8..2b67433fa6c 100644 --- a/drivers/usb/otg/ab8500-usb.c +++ b/drivers/usb/otg/ab8500-usb.c @@ -55,6 +55,18 @@ #define AB8500_V20_31952_DISABLE_DELAY_US 100 /* usec */ #define AB8500_WD_V10_DISABLE_DELAY_MS 100 /* ms */ +/* Registers in bank 0x11 */ +#define AB8500_BANK12_ACCESS 0x00 + +/* Registers in bank 0x12 */ +#define AB8500_USB_PHY_TUNE1 0x05 +#define AB8500_USB_PHY_TUNE2 0x06 +#define AB8500_USB_PHY_TUNE3 0x07 + + + + + /* Usb line status register */ enum ab8500_usb_link_status { USB_LINK_NOT_CONFIGURED = 0, @@ -573,6 +585,7 @@ static int __devinit ab8500_usb_probe(struct platform_device *pdev) dev_get_platdata(pdev->dev.parent); int err; int rev; + int ret = -1; rev = abx500_get_chip_id(&pdev->dev); if (rev < 0) { @@ -639,6 +652,52 @@ static int __devinit ab8500_usb_probe(struct platform_device *pdev) goto fail3; } + /* Write Phy tuning values */ + if (ab->rev == 0x30) { + /* Enable the PBT/Bank 0x12 access */ + ret = abx500_set_register_interruptible(ab->dev, + AB8500_DEVELOPMENT, + AB8500_BANK12_ACCESS, + 0x01); + if (ret < 0) + printk(KERN_ERR "Failed to enable bank12" + " access ret=%d\n", ret); + + ret = abx500_set_register_interruptible(ab->dev, + AB8500_DEBUG, + AB8500_USB_PHY_TUNE1, + 0xC8); + if (ret < 0) + printk(KERN_ERR "Failed to set PHY_TUNE1" + " register ret=%d\n", ret); + + ret = abx500_set_register_interruptible(ab->dev, + AB8500_DEBUG, + AB8500_USB_PHY_TUNE2, + 0x00); + if (ret < 0) + printk(KERN_ERR "Failed to set PHY_TUNE2" + " register ret=%d\n", ret); + + ret = abx500_set_register_interruptible(ab->dev, + AB8500_DEBUG, + AB8500_USB_PHY_TUNE3, + 0x78); + + if (ret < 0) + printk(KERN_ERR "Failed to set PHY_TUNE3" + " regester ret=%d\n", ret); + + /* Switch to normal mode/disable Bank 0x12 access */ + ret = abx500_set_register_interruptible(ab->dev, + AB8500_DEVELOPMENT, + AB8500_BANK12_ACCESS, + 0x00); + + if (ret < 0) + printk(KERN_ERR "Failed to switch bank12" + " access ret=%d\n", ret); + } /* Needed to enable ID detection. */ ab8500_usb_wd_workaround(ab); |