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>
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@ -33,11 +33,22 @@
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#include <linux/mfd/abx500/ab8500.h>
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#include <linux/mfd/abx500/ab8500.h>
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#include <linux/usb/musb-ux500.h>
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#include <linux/usb/musb-ux500.h>
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/* Bank AB8500_SYS_CTRL2_BLOCK */
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#define AB8500_MAIN_WD_CTRL_REG 0x01
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#define AB8500_MAIN_WD_CTRL_REG 0x01
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/* Bank AB8500_USB */
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#define AB8500_USB_LINE_STAT_REG 0x80
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#define AB8500_USB_LINE_STAT_REG 0x80
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#define AB8505_USB_LINE_STAT_REG 0x94
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#define AB8505_USB_LINE_STAT_REG 0x94
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#define AB8500_USB_PHY_CTRL_REG 0x8A
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#define AB8500_USB_PHY_CTRL_REG 0x8A
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/* Bank AB8500_DEVELOPMENT */
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#define AB8500_BANK12_ACCESS 0x00
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/* Bank AB8500_DEBUG */
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#define AB8500_USB_PHY_TUNE1 0x05
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#define AB8500_USB_PHY_TUNE2 0x06
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#define AB8500_USB_PHY_TUNE3 0x07
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#define AB8500_BIT_OTG_STAT_ID (1 << 0)
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#define AB8500_BIT_OTG_STAT_ID (1 << 0)
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#define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0)
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#define AB8500_BIT_PHY_CTRL_HOST_EN (1 << 0)
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#define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1)
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#define AB8500_BIT_PHY_CTRL_DEVICE_EN (1 << 1)
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@ -671,6 +682,82 @@ static int ab8500_usb_probe(struct platform_device *pdev)
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return err;
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return err;
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}
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}
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/* Phy tuning values for AB8500 */
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if (!is_ab8500_2p0_or_earlier(ab->ab8500)) {
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/* Enable the PBT/Bank 0x12 access */
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err = abx500_set_register_interruptible(ab->dev,
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AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x01);
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if (err < 0)
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dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
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err);
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err = abx500_set_register_interruptible(ab->dev,
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AB8500_DEBUG, AB8500_USB_PHY_TUNE1, 0xC8);
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if (err < 0)
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dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
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err);
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err = abx500_set_register_interruptible(ab->dev,
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AB8500_DEBUG, AB8500_USB_PHY_TUNE2, 0x00);
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if (err < 0)
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dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
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err);
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err = abx500_set_register_interruptible(ab->dev,
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AB8500_DEBUG, AB8500_USB_PHY_TUNE3, 0x78);
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if (err < 0)
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dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
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err);
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/* Switch to normal mode/disable Bank 0x12 access */
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err = abx500_set_register_interruptible(ab->dev,
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AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS, 0x00);
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if (err < 0)
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dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
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err);
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}
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/* Phy tuning values for AB8505 */
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if (is_ab8505(ab->ab8500)) {
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/* Enable the PBT/Bank 0x12 access */
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err = abx500_mask_and_set_register_interruptible(ab->dev,
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AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS,
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0x01, 0x01);
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if (err < 0)
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dev_err(ab->dev, "Failed to enable bank12 access err=%d\n",
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err);
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err = abx500_mask_and_set_register_interruptible(ab->dev,
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AB8500_DEBUG, AB8500_USB_PHY_TUNE1,
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0xC8, 0xC8);
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if (err < 0)
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dev_err(ab->dev, "Failed to set PHY_TUNE1 register err=%d\n",
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err);
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err = abx500_mask_and_set_register_interruptible(ab->dev,
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AB8500_DEBUG, AB8500_USB_PHY_TUNE2,
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0x60, 0x60);
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if (err < 0)
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dev_err(ab->dev, "Failed to set PHY_TUNE2 register err=%d\n",
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err);
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err = abx500_mask_and_set_register_interruptible(ab->dev,
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AB8500_DEBUG, AB8500_USB_PHY_TUNE3,
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0xFC, 0x80);
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if (err < 0)
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dev_err(ab->dev, "Failed to set PHY_TUNE3 regester err=%d\n",
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err);
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/* Switch to normal mode/disable Bank 0x12 access */
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err = abx500_mask_and_set_register_interruptible(ab->dev,
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AB8500_DEVELOPMENT, AB8500_BANK12_ACCESS,
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0x00, 0x00);
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if (err < 0)
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dev_err(ab->dev, "Failed to switch bank12 access err=%d\n",
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err);
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}
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/* Needed to enable ID detection. */
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/* Needed to enable ID detection. */
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ab8500_usb_wd_workaround(ab);
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ab8500_usb_wd_workaround(ab);
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