diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-26 08:14:13 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-26 08:14:13 -0700 |
commit | 9703fc8caf36ac65dca1538b23dd137de0b53233 (patch) | |
tree | 4e92539741cdce08f3c0095fefe76232a686f576 /drivers/phy/socionext/phy-uniphier-usb2.c | |
parent | da19a102ce87bf3e0a7fe277a659d1fc35330d6d (diff) | |
parent | b8d9ee24493d862fbfeb3d209c032647f6073d5d (diff) |
Merge tag 'usb-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB/PHY updates from Greg KH:
"Here is the big USB/PHY driver patches for 4.20-rc1
Lots of USB changes in here, primarily in these areas:
- typec updates and new drivers
- new PHY drivers
- dwc2 driver updates and additions (this old core keeps getting
added to new devices.)
- usbtmc major update based on the industry group coming together and
working to add new features and performance to the driver.
- USB gadget additions for new features
- USB gadget configfs updates
- chipidea driver updates
- other USB gadget updates
- USB serial driver updates
- renesas driver updates
- xhci driver updates
- other tiny USB driver updates
All of these have been in linux-next for a while with no reported
issues"
* tag 'usb-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (229 commits)
usb: phy: ab8500: silence some uninitialized variable warnings
usb: xhci: tegra: Add genpd support
usb: xhci: tegra: Power-off power-domains on removal
usbip:vudc: BUG kmalloc-2048 (Not tainted): Poison overwritten
usbip: tools: fix atoi() on non-null terminated string
USB: misc: appledisplay: fix backlight update_status return code
phy: phy-pxa-usb: add a new driver
usb: host: add DT bindings for faraday fotg2
usb: host: ohci-at91: fix request of irq for optional gpio
usb/early: remove set but not used variable 'remain_length'
usb: typec: Fix copy/paste on typec_set_vconn_role() kerneldoc
usb: typec: tcpm: Report back negotiated PPS voltage and current
USB: core: remove set but not used variable 'udev'
usb: core: fix memory leak on port_dev_path allocation
USB: net2280: Remove ->disconnect() callback from net2280_pullup()
usb: dwc2: disable power_down on rockchip devices
usb: gadget: udc: renesas_usb3: add support for r8a77990
dt-bindings: usb: renesas_usb3: add bindings for r8a77990
usb: gadget: udc: renesas_usb3: Add r8a774a1 support
USB: serial: cypress_m8: remove set but not used variable 'iflag'
...
Diffstat (limited to 'drivers/phy/socionext/phy-uniphier-usb2.c')
-rw-r--r-- | drivers/phy/socionext/phy-uniphier-usb2.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/drivers/phy/socionext/phy-uniphier-usb2.c b/drivers/phy/socionext/phy-uniphier-usb2.c new file mode 100644 index 000000000000..3f2086ed4fe4 --- /dev/null +++ b/drivers/phy/socionext/phy-uniphier-usb2.c @@ -0,0 +1,244 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * phy-uniphier-usb2.c - PHY driver for UniPhier USB2 controller + * Copyright 2015-2018 Socionext Inc. + * Author: + * Kunihiko Hayashi <hayashi.kunihiko@socionext.com> + */ + +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> + +#define SG_USBPHY1CTRL 0x500 +#define SG_USBPHY1CTRL2 0x504 +#define SG_USBPHY2CTRL 0x508 +#define SG_USBPHY2CTRL2 0x50c /* LD11 */ +#define SG_USBPHY12PLL 0x50c /* Pro4 */ +#define SG_USBPHY3CTRL 0x510 +#define SG_USBPHY3CTRL2 0x514 +#define SG_USBPHY4CTRL 0x518 /* Pro4 */ +#define SG_USBPHY4CTRL2 0x51c /* Pro4 */ +#define SG_USBPHY34PLL 0x51c /* Pro4 */ + +struct uniphier_u2phy_param { + u32 offset; + u32 value; +}; + +struct uniphier_u2phy_soc_data { + struct uniphier_u2phy_param config0; + struct uniphier_u2phy_param config1; +}; + +struct uniphier_u2phy_priv { + struct regmap *regmap; + struct phy *phy; + struct regulator *vbus; + const struct uniphier_u2phy_soc_data *data; + struct uniphier_u2phy_priv *next; +}; + +static int uniphier_u2phy_power_on(struct phy *phy) +{ + struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy); + int ret = 0; + + if (priv->vbus) + ret = regulator_enable(priv->vbus); + + return ret; +} + +static int uniphier_u2phy_power_off(struct phy *phy) +{ + struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy); + + if (priv->vbus) + regulator_disable(priv->vbus); + + return 0; +} + +static int uniphier_u2phy_init(struct phy *phy) +{ + struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy); + + if (!priv->data) + return 0; + + regmap_write(priv->regmap, priv->data->config0.offset, + priv->data->config0.value); + regmap_write(priv->regmap, priv->data->config1.offset, + priv->data->config1.value); + + return 0; +} + +static struct phy *uniphier_u2phy_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct uniphier_u2phy_priv *priv = dev_get_drvdata(dev); + + while (priv && args->np != priv->phy->dev.of_node) + priv = priv->next; + + if (!priv) { + dev_err(dev, "Failed to find appropriate phy\n"); + return ERR_PTR(-EINVAL); + } + + return priv->phy; +} + +static const struct phy_ops uniphier_u2phy_ops = { + .init = uniphier_u2phy_init, + .power_on = uniphier_u2phy_power_on, + .power_off = uniphier_u2phy_power_off, + .owner = THIS_MODULE, +}; + +static int uniphier_u2phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *parent, *child; + struct uniphier_u2phy_priv *priv = NULL, *next = NULL; + struct phy_provider *phy_provider; + struct regmap *regmap; + const struct uniphier_u2phy_soc_data *data; + int ret, data_idx, ndatas; + + data = of_device_get_match_data(dev); + if (WARN_ON(!data)) + return -EINVAL; + + /* get number of data */ + for (ndatas = 0; data[ndatas].config0.offset; ndatas++) + ; + + parent = of_get_parent(dev->of_node); + regmap = syscon_node_to_regmap(parent); + of_node_put(parent); + if (IS_ERR(regmap)) { + dev_err(dev, "Failed to get regmap\n"); + return PTR_ERR(regmap); + } + + for_each_child_of_node(dev->of_node, child) { + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) { + ret = -ENOMEM; + goto out_put_child; + } + priv->regmap = regmap; + + priv->vbus = devm_regulator_get_optional(dev, "vbus"); + if (IS_ERR(priv->vbus)) { + if (PTR_ERR(priv->vbus) == -EPROBE_DEFER) { + ret = PTR_ERR(priv->vbus); + goto out_put_child; + } + priv->vbus = NULL; + } + + priv->phy = devm_phy_create(dev, child, &uniphier_u2phy_ops); + if (IS_ERR(priv->phy)) { + dev_err(dev, "Failed to create phy\n"); + ret = PTR_ERR(priv->phy); + goto out_put_child; + } + + ret = of_property_read_u32(child, "reg", &data_idx); + if (ret) { + dev_err(dev, "Failed to get reg property\n"); + goto out_put_child; + } + + if (data_idx < ndatas) + priv->data = &data[data_idx]; + else + dev_warn(dev, "No phy configuration: %s\n", + child->full_name); + + phy_set_drvdata(priv->phy, priv); + priv->next = next; + next = priv; + } + + dev_set_drvdata(dev, priv); + phy_provider = devm_of_phy_provider_register(dev, + uniphier_u2phy_xlate); + return PTR_ERR_OR_ZERO(phy_provider); + +out_put_child: + of_node_put(child); + + return ret; +} + +static const struct uniphier_u2phy_soc_data uniphier_pro4_data[] = { + { + .config0 = { SG_USBPHY1CTRL, 0x05142400 }, + .config1 = { SG_USBPHY12PLL, 0x00010010 }, + }, + { + .config0 = { SG_USBPHY2CTRL, 0x05142400 }, + .config1 = { SG_USBPHY12PLL, 0x00010010 }, + }, + { + .config0 = { SG_USBPHY3CTRL, 0x05142400 }, + .config1 = { SG_USBPHY34PLL, 0x00010010 }, + }, + { + .config0 = { SG_USBPHY4CTRL, 0x05142400 }, + .config1 = { SG_USBPHY34PLL, 0x00010010 }, + }, + { /* sentinel */ } +}; + +static const struct uniphier_u2phy_soc_data uniphier_ld11_data[] = { + { + .config0 = { SG_USBPHY1CTRL, 0x82280000 }, + .config1 = { SG_USBPHY1CTRL2, 0x00000106 }, + }, + { + .config0 = { SG_USBPHY2CTRL, 0x82280000 }, + .config1 = { SG_USBPHY2CTRL2, 0x00000106 }, + }, + { + .config0 = { SG_USBPHY3CTRL, 0x82280000 }, + .config1 = { SG_USBPHY3CTRL2, 0x00000106 }, + }, + { /* sentinel */ } +}; + +static const struct of_device_id uniphier_u2phy_match[] = { + { + .compatible = "socionext,uniphier-pro4-usb2-phy", + .data = &uniphier_pro4_data, + }, + { + .compatible = "socionext,uniphier-ld11-usb2-phy", + .data = &uniphier_ld11_data, + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, uniphier_u2phy_match); + +static struct platform_driver uniphier_u2phy_driver = { + .probe = uniphier_u2phy_probe, + .driver = { + .name = "uniphier-usb2-phy", + .of_match_table = uniphier_u2phy_match, + }, +}; +module_platform_driver(uniphier_u2phy_driver); + +MODULE_AUTHOR("Kunihiko Hayashi <hayashi.kunihiko@socionext.com>"); +MODULE_DESCRIPTION("UniPhier PHY driver for USB2 controller"); +MODULE_LICENSE("GPL v2"); |