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![Simon Glass](/assets/img/avatar_default.png)
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
266 lines
6.3 KiB
C
266 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* OMAP USB2 PHY LAYER
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*
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* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com
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* Written by Jean-Jacques Hiblot <jjhiblot@ti.com>
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <dm.h>
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#include <errno.h>
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#include <generic-phy.h>
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#include <regmap.h>
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#include <soc.h>
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#include <syscon.h>
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#include <linux/bitops.h>
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#include <linux/err.h>
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#define OMAP_USB2_CALIBRATE_FALSE_DISCONNECT BIT(0)
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#define OMAP_USB2_DISABLE_CHG_DET BIT(1)
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#define OMAP_DEV_PHY_PD BIT(0)
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#define OMAP_USB2_PHY_PD BIT(28)
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#define AM437X_USB2_PHY_PD BIT(0)
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#define AM437X_USB2_OTG_PD BIT(1)
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#define AM437X_USB2_OTGVDET_EN BIT(19)
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#define AM437X_USB2_OTGSESSEND_EN BIT(20)
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#define USB2PHY_DISCON_BYP_LATCH BIT(31)
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#define USB2PHY_ANA_CONFIG1 (0x4c)
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#define AM654_USB2_OTG_PD BIT(8)
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#define AM654_USB2_VBUS_DET_EN BIT(5)
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#define AM654_USB2_VBUSVALID_DET_EN BIT(4)
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#define USB2PHY_CHRG_DET 0x14
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#define USB2PHY_USE_CHG_DET_REG BIT(29)
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#define USB2PHY_DIS_CHG_DET BIT(28)
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DECLARE_GLOBAL_DATA_PTR;
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struct omap_usb2_phy {
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struct regmap *pwr_regmap;
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ulong flags;
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void *phy_base;
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u32 pwr_reg_offset;
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};
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struct usb_phy_data {
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const char *label;
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u8 flags;
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u32 mask;
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u32 power_on;
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u32 power_off;
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};
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static const struct usb_phy_data omap5_usb2_data = {
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.label = "omap5_usb2",
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.flags = 0,
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.mask = OMAP_DEV_PHY_PD,
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.power_off = OMAP_DEV_PHY_PD,
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};
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static const struct usb_phy_data dra7x_usb2_data = {
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.label = "dra7x_usb2",
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.flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
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.mask = OMAP_DEV_PHY_PD,
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.power_off = OMAP_DEV_PHY_PD,
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};
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static const struct usb_phy_data dra7x_usb2_phy2_data = {
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.label = "dra7x_usb2_phy2",
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.flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
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.mask = OMAP_USB2_PHY_PD,
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.power_off = OMAP_USB2_PHY_PD,
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};
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static const struct usb_phy_data am437x_usb2_data = {
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.label = "am437x_usb2",
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.flags = 0,
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.mask = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD |
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AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN,
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.power_on = AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN,
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.power_off = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD,
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};
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static const struct usb_phy_data am654_usb2_data = {
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.label = "am654_usb2",
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.flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
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.mask = AM654_USB2_OTG_PD | AM654_USB2_VBUS_DET_EN |
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AM654_USB2_VBUSVALID_DET_EN,
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.power_on = AM654_USB2_VBUS_DET_EN | AM654_USB2_VBUSVALID_DET_EN,
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.power_off = AM654_USB2_OTG_PD,
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};
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static const struct udevice_id omap_usb2_id_table[] = {
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{
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.compatible = "ti,omap5-usb2",
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.data = (ulong)&omap5_usb2_data,
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},
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{
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.compatible = "ti,dra7x-usb2",
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.data = (ulong)&dra7x_usb2_data,
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},
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{
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.compatible = "ti,dra7x-usb2-phy2",
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.data = (ulong)&dra7x_usb2_phy2_data,
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},
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{
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.compatible = "ti,am437x-usb2",
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.data = (ulong)&am437x_usb2_data,
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},
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{
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.compatible = "ti,am654-usb2",
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.data = (ulong)&am654_usb2_data,
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},
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{},
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};
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static int omap_usb_phy_power(struct phy *usb_phy, bool on)
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{
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struct udevice *dev = usb_phy->dev;
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const struct usb_phy_data *data;
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const struct omap_usb2_phy *phy = dev_get_priv(dev);
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u32 val;
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int rc;
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data = (const struct usb_phy_data *)dev_get_driver_data(dev);
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if (!data)
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return -EINVAL;
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rc = regmap_read(phy->pwr_regmap, phy->pwr_reg_offset, &val);
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if (rc)
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return rc;
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val &= ~data->mask;
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if (on)
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val |= data->power_on;
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else
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val |= data->power_off;
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rc = regmap_write(phy->pwr_regmap, phy->pwr_reg_offset, val);
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if (rc)
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return rc;
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return 0;
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}
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static int omap_usb2_phy_init(struct phy *usb_phy)
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{
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struct udevice *dev = usb_phy->dev;
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struct omap_usb2_phy *priv = dev_get_priv(dev);
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u32 val;
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if (priv->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
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/*
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*
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* Reduce the sensitivity of internal PHY by enabling the
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* DISCON_BYP_LATCH of the USB2PHY_ANA_CONFIG1 register. This
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* resolves issues with certain devices which can otherwise
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* be prone to false disconnects.
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*
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*/
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val = readl(priv->phy_base + USB2PHY_ANA_CONFIG1);
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val |= USB2PHY_DISCON_BYP_LATCH;
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writel(val, priv->phy_base + USB2PHY_ANA_CONFIG1);
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}
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if (priv->flags & OMAP_USB2_DISABLE_CHG_DET) {
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val = readl(priv->phy_base + USB2PHY_CHRG_DET);
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val |= USB2PHY_USE_CHG_DET_REG | USB2PHY_DIS_CHG_DET;
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writel(val, priv->phy_base + USB2PHY_CHRG_DET);
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}
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return 0;
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}
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static int omap_usb2_phy_power_on(struct phy *usb_phy)
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{
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return omap_usb_phy_power(usb_phy, true);
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}
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static int omap_usb2_phy_power_off(struct phy *usb_phy)
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{
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return omap_usb_phy_power(usb_phy, false);
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}
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static int omap_usb2_phy_exit(struct phy *usb_phy)
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{
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return omap_usb_phy_power(usb_phy, false);
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}
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struct phy_ops omap_usb2_phy_ops = {
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.init = omap_usb2_phy_init,
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.power_on = omap_usb2_phy_power_on,
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.power_off = omap_usb2_phy_power_off,
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.exit = omap_usb2_phy_exit,
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};
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static const struct soc_attr am65x_sr10_soc_devices[] = {
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{ .family = "AM65X", .revision = "SR1.0" },
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{ /* sentinel */ }
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};
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int omap_usb2_phy_probe(struct udevice *dev)
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{
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int rc;
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struct regmap *regmap;
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struct omap_usb2_phy *priv = dev_get_priv(dev);
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const struct usb_phy_data *data;
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u32 tmp[2];
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data = (const struct usb_phy_data *)dev_get_driver_data(dev);
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if (!data)
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return -EINVAL;
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priv->phy_base = dev_read_addr_ptr(dev);
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if (!priv->phy_base)
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return -EINVAL;
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if (data->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT)
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priv->flags |= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;
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/*
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* AM654x PG1.0 has a silicon bug that D+ is pulled high after
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* POR, which could cause enumeration failure with some USB hubs.
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* Disabling the USB2_PHY Charger Detect function will put D+
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* into the normal state.
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*
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* Enable this workaround for AM654x PG1.0.
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*/
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if (soc_device_match(am65x_sr10_soc_devices))
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priv->flags |= OMAP_USB2_DISABLE_CHG_DET;
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regmap = syscon_regmap_lookup_by_phandle(dev, "syscon-phy-power");
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if (!IS_ERR(regmap)) {
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priv->pwr_regmap = regmap;
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rc = dev_read_u32_array(dev, "syscon-phy-power", tmp, 2);
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if (rc) {
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printf("couldn't get power reg. offset (err %d)\n", rc);
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return rc;
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}
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priv->pwr_reg_offset = tmp[1];
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return 0;
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}
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regmap = syscon_regmap_lookup_by_phandle(dev, "ctrl-module");
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if (!IS_ERR(regmap)) {
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priv->pwr_regmap = regmap;
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priv->pwr_reg_offset = 0;
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return 0;
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}
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printf("can't get regmap (err %ld)\n", PTR_ERR(regmap));
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return PTR_ERR(regmap);
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}
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U_BOOT_DRIVER(omap_usb2_phy) = {
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.name = "omap_usb2_phy",
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.id = UCLASS_PHY,
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.of_match = omap_usb2_id_table,
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.probe = omap_usb2_phy_probe,
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.ops = &omap_usb2_phy_ops,
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.priv_auto = sizeof(struct omap_usb2_phy),
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};
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