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| author | Sakethram Bommisetti <sakethram.bommisetti@stericsson.com> | 2013-04-03 10:45:04 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2013-04-03 11:59:42 +0300 |
| commit | 7124631aa892712fc8b317ff34d25c14dee6f63d (patch) | |
| tree | b477f796cfbe291f261de00082fd0ac800629a0e /drivers/usb/phy | |
| parent | 81ef6724302e0c7ba3f087403de24760601b1839 (diff) | |
| download | linux-7124631aa892712fc8b317ff34d25c14dee6f63d.tar.gz linux-7124631aa892712fc8b317ff34d25c14dee6f63d.tar.bz2 linux-7124631aa892712fc8b317ff34d25c14dee6f63d.zip | |
usb: phy: ab8500-usb: set phy tuning values
Set phy tuning values proposed by the hardware teams for AB8500 and
AB8505 to improve USB eye diagram performances.
Signed-off-by: Sakethram Bommisetti <sakethram.bommisetti@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/phy')
| -rw-r--r-- | drivers/usb/phy/phy-ab8500-usb.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/drivers/usb/phy/phy-ab8500-usb.c b/drivers/usb/phy/phy-ab8500-usb.c index ab6dd072ae25..5b92a59804eb 100644 --- a/drivers/usb/phy/phy-ab8500-usb.c +++ b/drivers/usb/phy/phy-ab8500-usb.c @@ -33,11 +33,22 @@ #include <linux/mfd/abx500/ab8500.h> #include <linux/usb/musb-ux500.h> +/* Bank AB8500_SYS_CTRL2_BLOCK */ #define AB8500_MAIN_WD_CTRL_REG 0x01 + +/* Bank AB8500_USB */ #define AB8500_USB_LINE_STAT_REG 0x80 #define AB8505_USB_LINE_STAT_REG 0x94 #define AB8500_USB_PHY_CTRL_REG 0x8A +/* Bank AB8500_DEVELOPMENT */ +#define AB8500_BANK12_ACCESS 0x00 + +/* Bank AB8500_DEBUG */ +#define AB8500_USB_PHY_TUNE1 0x05 +#define AB8500_USB_PHY_TUNE2 0x06 +#define AB8500_USB_PHY_TUNE3 0x07 + #define AB8500_BIT_OTG_STAT_ID (1 << 0) #define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0) #define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1) @@ -671,6 +682,82 @@ static int ab8500_usb_probe(struct platform_device *pdev) return err; } + /* Phy tuning values for AB8500 */ + if (!is_ab8500_2p0_or_earlier(ab->ab8500)) { + /* Enable the PBT/Bank 0x12 access */ + err = abx500_set_register_interruptible(ab->dev, + AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01); + if (err < 0) + dev_err(ab->dev, "Failed to enable bank12 access err=%d\n", + err); + + err = abx500_set_register_interruptible(ab->dev, + AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8); + if (err < 0) + dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n", + err); + + err = abx500_set_register_interruptible(ab->dev, + AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x00); + if (err < 0) + dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n", + err); + + err = abx500_set_register_interruptible(ab->dev, + AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x78); + if (err < 0) + dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n", + err); + + /* Switch to normal mode/disable Bank 0x12 access */ + err = abx500_set_register_interruptible(ab->dev, + AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00); + if (err < 0) + dev_err(ab->dev, "Failed to switch bank12 access err=%d\n", + err); + } + + /* Phy tuning values for AB8505 */ + if (is_ab8505(ab->ab8500)) { + /* Enable the PBT/Bank 0x12 access */ + err = abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, + 0x01, 0x01); + if (err < 0) + dev_err(ab->dev, "Failed to enable bank12 access err=%d\n", + err); + + err = abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_DEBUG, AB8500_USB_PHY_TUNE1, + 0xC8, 0xC8); + if (err < 0) + dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n", + err); + + err = abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_DEBUG, AB8500_USB_PHY_TUNE2, + 0x60, 0x60); + if (err < 0) + dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n", + err); + + err = abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_DEBUG, AB8500_USB_PHY_TUNE3, + 0xFC, 0x80); + + if (err < 0) + dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n", + err); + + /* Switch to normal mode/disable Bank 0x12 access */ + err = abx500_mask_and_set_register_interruptible(ab->dev, + AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, + 0x00, 0x00); + if (err < 0) + dev_err(ab->dev, "Failed to switch bank12 access err=%d\n", + err); + } + /* Needed to enable ID detection. */ ab8500_usb_wd_workaround(ab); |