diff options
Diffstat (limited to 'drivers/usb/phy/phy-owl-usb3.c')
| -rw-r--r-- | drivers/usb/phy/phy-owl-usb3.c | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/drivers/usb/phy/phy-owl-usb3.c b/drivers/usb/phy/phy-owl-usb3.c new file mode 100644 index 000000000000..5256ecc2d665 --- /dev/null +++ b/drivers/usb/phy/phy-owl-usb3.c @@ -0,0 +1,183 @@ +/* + * Actions OWL SoCs phy driver + * + * Copyright (c) 2015 Actions Semiconductor Co., ltd. + * tangshaoqing <tangshaoqing@actions-semi.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License v2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_device.h> + +#include "phy-owl-usb.h" + + + +static inline u8 owl_phy_readb(void __iomem *base, u32 offset) +{ + return readb(base + offset); +} + +static inline void owl_phy_writeb(void __iomem *base, u32 offset, u8 value) +{ + writeb(value, base + offset); +} + + + +#define USB3_TX_DATA_PATH_CTRL (0X5D) +#define USB3_RX_DATA_PATH_CTRL1 (0X87) + +static int s900_usb3phy_init(struct usb_phy *phy) +{ + struct owl_usbphy *sphy = phy_to_sphy(phy); + void __iomem *base = sphy->regs; + u8 reg; + u32 offset; + + + /* IO_OR_U8(USB3_TX_DATA_PATH_CTRL, 0x02); */ + offset = USB3_TX_DATA_PATH_CTRL; + reg = owl_phy_readb(base, offset); + reg |= 0x02; + owl_phy_writeb(base, offset, reg); + printk("%s 0x%x:0x%x\n",__FUNCTION__, offset, owl_phy_readb(base, offset)); + + /* IO_OR_U8(USB3_RX_DATA_PATH_CTRL1, 0x20); */ + offset = USB3_RX_DATA_PATH_CTRL1; + reg = owl_phy_readb(base, offset); + reg |= 0x20; + owl_phy_writeb(base, offset, reg); + printk("%s 0x%x:0x%x\n",__FUNCTION__, offset, owl_phy_readb(base, offset)); + + return 0; +} + +static int owl_usb3phy_init(struct usb_phy *phy) +{ + struct owl_usbphy *sphy = phy_to_sphy(phy); + + if (sphy->data->ic_type == PHY_S900) + s900_usb3phy_init(phy); + + return 0; +} + +static void owl_usb3phy_shutdown(struct usb_phy *phy) +{ +} + +static const struct of_device_id owl_usbphy_dt_match[]; +static int owl_usb3phy_probe(struct platform_device *pdev) +{ + const struct of_device_id *of_id = + of_match_device(owl_usbphy_dt_match, &pdev->dev); + struct owl_usbphy *sphy; + struct device *dev = &pdev->dev; + struct resource *phy_mem; + void __iomem *phy_base; + + if (!of_id) { + dev_err(dev, "no compatible OF match\n"); + return -EINVAL; + } + + phy_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + phy_base = devm_ioremap_nocache(dev, phy_mem->start, resource_size(phy_mem)); + if (!phy_base) { + dev_err(dev, "ioremap failed\n"); + return -ENOMEM; + } + + sphy = devm_kzalloc(dev, sizeof(*sphy), GFP_KERNEL); + if (!sphy) + return -ENOMEM; + + + sphy->dev = dev; + sphy->data = (struct phy_owl_data *)of_id->data; + + + sphy->regs = phy_base; + sphy->phy.dev = sphy->dev; + sphy->phy.label = "owl-usb3phy"; + sphy->phy.init = owl_usb3phy_init; + sphy->phy.shutdown = owl_usb3phy_shutdown; + + + platform_set_drvdata(pdev, sphy); + + printk("%s %d\n", __func__, __LINE__); + + return usb_add_phy(&sphy->phy, USB_PHY_TYPE_USB3); +} + +static int owl_usb3phy_remove(struct platform_device *pdev) +{ + struct owl_usbphy *sphy = platform_get_drvdata(pdev); + + usb_remove_phy(&sphy->phy); + + return 0; +} + + +#ifdef CONFIG_OF +static struct phy_owl_data phy_owl_s700_data = { + .ic_type = PHY_S700, +}; + +static struct phy_owl_data phy_owl_s900_data = { + .ic_type = PHY_S900, +}; + +static const struct of_device_id owl_usbphy_dt_match[] = { + { + .compatible = "actions,s700-usb3phy", + .data = &phy_owl_s700_data, + }, + { + .compatible = "actions,s900-usb3phy", + .data = &phy_owl_s900_data, + }, + {}, +}; +MODULE_DEVICE_TABLE(of, owl_usbphy_dt_match); +#endif + + +static struct platform_driver owl_usb3phy_driver = { + .probe = owl_usb3phy_probe, + .remove = owl_usb3phy_remove, + .driver = { + .name = "owl-usb3phy", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(owl_usbphy_dt_match), + }, +}; + +module_platform_driver(owl_usb3phy_driver); + +MODULE_DESCRIPTION("Actions owl USB 3.0 phy controller"); +MODULE_AUTHOR("tangshaoqing <tangshaoqing@actions-semi.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:owl-usb3phy"); |