diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-29 12:19:23 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-29 12:19:23 -0700 |
commit | ec25e246b94a3233ab064994ef05a170bdba0e7c (patch) | |
tree | 49b7d7e4c46e13bb465c7b832961596e41e8526a /drivers/usb/phy/phy-mxs-usb.c | |
parent | 507ffe4f3840ac24890a8123c702cf1b7fe4d33c (diff) | |
parent | 4626b8daf9bb00ce6b4d533c1a155211ad880f32 (diff) |
Merge tag 'usb-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB patches from Greg Kroah-Hartman:
"Here's the big USB pull request for 3.10-rc1.
Lots of USB patches here, the majority being USB gadget changes and
USB-serial driver cleanups, the rest being ARM build fixes / cleanups,
and individual driver updates. We also finally got some chipidea
fixes, which have been delayed for a number of kernel releases, as the
maintainer has now reappeared.
All of these have been in linux-next for a while"
* tag 'usb-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (568 commits)
USB: ehci-msm: USB_MSM_OTG needs USB_PHY
USB: OHCI: avoid conflicting platform drivers
USB: OMAP: ISP1301 needs USB_PHY
USB: lpc32xx: ISP1301 needs USB_PHY
USB: ftdi_sio: enable two UART ports on ST Microconnect Lite
usb: phy: tegra: don't call into tegra-ehci directly
usb: phy: phy core cannot yet be a module
USB: Fix initconst in ehci driver
usb-storage: CY7C68300A chips do not support Cypress ATACB
USB: serial: option: Added support Olivetti Olicard 145
USB: ftdi_sio: correct ST Micro Connect Lite PIDs
ARM: mxs_defconfig: add CONFIG_USB_PHY
ARM: imx_v6_v7_defconfig: add CONFIG_USB_PHY
usb: phy: remove exported function from __init section
usb: gadget: zero: put function instances on unbind
usb: gadget: f_sourcesink.c: correct a copy-paste misnomer
usb: gadget: cdc2: fix error return code in cdc_do_config()
usb: gadget: multi: fix error return code in rndis_do_config()
usb: gadget: f_obex: fix error return code in obex_bind()
USB: storage: convert to use module_usb_driver()
...
Diffstat (limited to 'drivers/usb/phy/phy-mxs-usb.c')
-rw-r--r-- | drivers/usb/phy/phy-mxs-usb.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c new file mode 100644 index 000000000000..9d4381e64d51 --- /dev/null +++ b/drivers/usb/phy/phy-mxs-usb.c @@ -0,0 +1,220 @@ +/* + * Copyright 2012 Freescale Semiconductor, Inc. + * Copyright (C) 2012 Marek Vasut <marex@denx.de> + * on behalf of DENX Software Engineering GmbH + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/usb/otg.h> +#include <linux/stmp_device.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/io.h> + +#define DRIVER_NAME "mxs_phy" + +#define HW_USBPHY_PWD 0x00 +#define HW_USBPHY_CTRL 0x30 +#define HW_USBPHY_CTRL_SET 0x34 +#define HW_USBPHY_CTRL_CLR 0x38 + +#define BM_USBPHY_CTRL_SFTRST BIT(31) +#define BM_USBPHY_CTRL_CLKGATE BIT(30) +#define BM_USBPHY_CTRL_ENUTMILEVEL3 BIT(15) +#define BM_USBPHY_CTRL_ENUTMILEVEL2 BIT(14) +#define BM_USBPHY_CTRL_ENHOSTDISCONDETECT BIT(1) + +struct mxs_phy { + struct usb_phy phy; + struct clk *clk; +}; + +#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy) + +static void mxs_phy_hw_init(struct mxs_phy *mxs_phy) +{ + void __iomem *base = mxs_phy->phy.io_priv; + + stmp_reset_block(base + HW_USBPHY_CTRL); + + /* Power up the PHY */ + writel(0, base + HW_USBPHY_PWD); + + /* enable FS/LS device */ + writel(BM_USBPHY_CTRL_ENUTMILEVEL2 | + BM_USBPHY_CTRL_ENUTMILEVEL3, + base + HW_USBPHY_CTRL_SET); +} + +static int mxs_phy_init(struct usb_phy *phy) +{ + struct mxs_phy *mxs_phy = to_mxs_phy(phy); + + clk_prepare_enable(mxs_phy->clk); + mxs_phy_hw_init(mxs_phy); + + return 0; +} + +static void mxs_phy_shutdown(struct usb_phy *phy) +{ + struct mxs_phy *mxs_phy = to_mxs_phy(phy); + + writel(BM_USBPHY_CTRL_CLKGATE, + phy->io_priv + HW_USBPHY_CTRL_SET); + + clk_disable_unprepare(mxs_phy->clk); +} + +static int mxs_phy_suspend(struct usb_phy *x, int suspend) +{ + struct mxs_phy *mxs_phy = to_mxs_phy(x); + + if (suspend) { + writel(0xffffffff, x->io_priv + HW_USBPHY_PWD); + writel(BM_USBPHY_CTRL_CLKGATE, + x->io_priv + HW_USBPHY_CTRL_SET); + clk_disable_unprepare(mxs_phy->clk); + } else { + clk_prepare_enable(mxs_phy->clk); + writel(BM_USBPHY_CTRL_CLKGATE, + x->io_priv + HW_USBPHY_CTRL_CLR); + writel(0, x->io_priv + HW_USBPHY_PWD); + } + + return 0; +} + +static int mxs_phy_on_connect(struct usb_phy *phy, + enum usb_device_speed speed) +{ + dev_dbg(phy->dev, "%s speed device has connected\n", + (speed == USB_SPEED_HIGH) ? "high" : "non-high"); + + if (speed == USB_SPEED_HIGH) + writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, + phy->io_priv + HW_USBPHY_CTRL_SET); + + return 0; +} + +static int mxs_phy_on_disconnect(struct usb_phy *phy, + enum usb_device_speed speed) +{ + dev_dbg(phy->dev, "%s speed device has disconnected\n", + (speed == USB_SPEED_HIGH) ? "high" : "non-high"); + + if (speed == USB_SPEED_HIGH) + writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, + phy->io_priv + HW_USBPHY_CTRL_CLR); + + return 0; +} + +static int mxs_phy_probe(struct platform_device *pdev) +{ + struct resource *res; + void __iomem *base; + struct clk *clk; + struct mxs_phy *mxs_phy; + int ret; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "can't get device resources\n"); + return -ENOENT; + } + + base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(base)) + return PTR_ERR(base); + + clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(clk)) { + dev_err(&pdev->dev, + "can't get the clock, err=%ld", PTR_ERR(clk)); + return PTR_ERR(clk); + } + + mxs_phy = devm_kzalloc(&pdev->dev, sizeof(*mxs_phy), GFP_KERNEL); + if (!mxs_phy) { + dev_err(&pdev->dev, "Failed to allocate USB PHY structure!\n"); + return -ENOMEM; + } + + mxs_phy->phy.io_priv = base; + mxs_phy->phy.dev = &pdev->dev; + mxs_phy->phy.label = DRIVER_NAME; + mxs_phy->phy.init = mxs_phy_init; + mxs_phy->phy.shutdown = mxs_phy_shutdown; + mxs_phy->phy.set_suspend = mxs_phy_suspend; + mxs_phy->phy.notify_connect = mxs_phy_on_connect; + mxs_phy->phy.notify_disconnect = mxs_phy_on_disconnect; + + ATOMIC_INIT_NOTIFIER_HEAD(&mxs_phy->phy.notifier); + + mxs_phy->clk = clk; + + platform_set_drvdata(pdev, &mxs_phy->phy); + + ret = usb_add_phy_dev(&mxs_phy->phy); + if (ret) + return ret; + + return 0; +} + +static int mxs_phy_remove(struct platform_device *pdev) +{ + struct mxs_phy *mxs_phy = platform_get_drvdata(pdev); + + usb_remove_phy(&mxs_phy->phy); + + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static const struct of_device_id mxs_phy_dt_ids[] = { + { .compatible = "fsl,imx23-usbphy", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mxs_phy_dt_ids); + +static struct platform_driver mxs_phy_driver = { + .probe = mxs_phy_probe, + .remove = mxs_phy_remove, + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + .of_match_table = mxs_phy_dt_ids, + }, +}; + +static int __init mxs_phy_module_init(void) +{ + return platform_driver_register(&mxs_phy_driver); +} +postcore_initcall(mxs_phy_module_init); + +static void __exit mxs_phy_module_exit(void) +{ + platform_driver_unregister(&mxs_phy_driver); +} +module_exit(mxs_phy_module_exit); + +MODULE_ALIAS("platform:mxs-usb-phy"); +MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); +MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>"); +MODULE_DESCRIPTION("Freescale MXS USB PHY driver"); +MODULE_LICENSE("GPL"); |