| Message ID | 1385403367-18144-9-git-send-email-matt.porter@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi, On Monday 25 November 2013 11:46 PM, Matt Porter wrote: > Add a driver for the internal Broadcom Kona USB 2.0 PHY found > on the BCM281xx family of SoCs. > > Signed-off-by: Matt Porter <matt.porter@linaro.org> > --- > drivers/phy/Kconfig | 6 ++ > drivers/phy/Makefile | 1 + > drivers/phy/phy-bcm-kona-usb2.c | 158 ++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 165 insertions(+) > create mode 100644 drivers/phy/phy-bcm-kona-usb2.c > > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig > index a344f3d..2e87fa8 100644 > --- a/drivers/phy/Kconfig > +++ b/drivers/phy/Kconfig > @@ -51,4 +51,10 @@ config PHY_EXYNOS_DP_VIDEO > help > Support for Display Port PHY found on Samsung EXYNOS SoCs. > > +config BCM_KONA_USB2_PHY > + tristate "Broadcom Kona USB2 PHY Driver" > + depends on GENERIC_PHY > + help > + Enable this to support the Broadcom Kona USB 2.0 PHY. > + > endmenu > diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile > index d0caae9..c447f1a 100644 > --- a/drivers/phy/Makefile > +++ b/drivers/phy/Makefile > @@ -3,6 +3,7 @@ > # > > obj-$(CONFIG_GENERIC_PHY) += phy-core.o > +obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o > obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o > obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o > obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o > diff --git a/drivers/phy/phy-bcm-kona-usb2.c b/drivers/phy/phy-bcm-kona-usb2.c > new file mode 100644 > index 0000000..2c54fb8 > --- /dev/null > +++ b/drivers/phy/phy-bcm-kona-usb2.c > @@ -0,0 +1,158 @@ > +/* > + * phy-bcm-kona-usb2.c - Broadcom Kona USB2 Phy Driver > + * > + * Copyright (C) 2013 Linaro Limited > + * Matt Porter <matt.porter@linaro.org> > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * 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. > + */ > + > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/delay.h> > +#include <linux/platform_device.h> > +#include <linux/err.h> > +#include <linux/io.h> > +#include <linux/clk.h> > +#include <linux/phy/phy.h> arrange the headers in alphabetical order so that it's easy while adding new headers. Just my preference. > + > +#define OTGCTL (0) > +#define OTGCTL_OTGSTAT2 (1 << 31) > +#define OTGCTL_OTGSTAT1 (1 << 30) > +#define OTGCTL_PRST_N_SW (1 << 11) > +#define OTGCTL_HRESET_N (1 << 10) > +#define OTGCTL_UTMI_LINE_STATE1 (1 << 9) > +#define OTGCTL_UTMI_LINE_STATE0 (1 << 8) > + > +#define P1CTL (8) > +#define P1CTL_SOFT_RESET (1 << 1) > +#define P1CTL_NON_DRIVING (1 << 0) you can use BIT() instead. > + > +struct bcm_kona_usb { > + void __iomem *regs; > +}; > + > +static void bcm_kona_usb_phy_power(struct bcm_kona_usb *phy, int on) > +{ > + u32 val; > + > + val = readl(phy->regs + OTGCTL); > + if (on) { > + /* Configure and power PHY */ > + val &= ~(OTGCTL_OTGSTAT2 | OTGCTL_OTGSTAT1 | > + OTGCTL_UTMI_LINE_STATE1 | OTGCTL_UTMI_LINE_STATE0); > + val |= OTGCTL_PRST_N_SW | OTGCTL_HRESET_N; > + } else { > + val &= ~(OTGCTL_PRST_N_SW | OTGCTL_HRESET_N); > + } > + writel(val, phy->regs + OTGCTL); > +} > + > +static int bcm_kona_usb_phy_init(struct phy *gphy) > +{ > + struct bcm_kona_usb *phy = phy_get_drvdata(gphy); > + u32 val; > + > + /* Soft reset PHY */ > + val = readl(phy->regs + P1CTL); > + val &= ~P1CTL_NON_DRIVING; > + val |= P1CTL_SOFT_RESET; > + writel(val, phy->regs + P1CTL); > + writel(val & ~P1CTL_SOFT_RESET, phy->regs + P1CTL); > + /* Reset needs to be asserted for 2ms */ > + mdelay(2); > + writel(val | P1CTL_SOFT_RESET, phy->regs + P1CTL); > + > + return 0; > +} > + > +static int bcm_kona_usb_phy_power_on(struct phy *gphy) > +{ > + struct bcm_kona_usb *phy = phy_get_drvdata(gphy); > + > + bcm_kona_usb_phy_power(phy, 1); > + > + return 0; > +} > + > +static int bcm_kona_usb_phy_power_off(struct phy *gphy) > +{ > + struct bcm_kona_usb *phy = phy_get_drvdata(gphy); > + > + bcm_kona_usb_phy_power(phy, 0); > + > + return 0; > +} > + > +static struct phy_ops ops = { > + .init = bcm_kona_usb_phy_init, > + .power_on = bcm_kona_usb_phy_power_on, > + .power_off = bcm_kona_usb_phy_power_off, > + .owner = THIS_MODULE, owner is aligned differently.. > +}; > + > +static int bcm_kona_usb2_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct bcm_kona_usb *phy; > + struct resource *res; > + struct phy *gphy; > + struct phy_provider *phy_provider; > + > + phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); > + if (!phy) > + return -ENOMEM; > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + phy->regs = devm_ioremap_resource(&pdev->dev, res); > + if (IS_ERR(phy->regs)) > + return PTR_ERR(phy->regs); > + > + platform_set_drvdata(pdev, phy); > + > + phy_provider = devm_of_phy_provider_register(dev, > + of_phy_simple_xlate); > + if (IS_ERR(phy_provider)) > + return PTR_ERR(phy_provider); > + > + gphy = devm_phy_create(dev, &ops, NULL); > + if (IS_ERR(gphy)) > + return PTR_ERR(gphy); > + > + /* The Kona PHY supports an 8-bit wide UTMI interface */ > + phy_set_bus_width(gphy, 8); > + > + phy_set_drvdata(gphy, phy); > + > + return 0; > +} > + > +static const struct of_device_id bcm_kona_usb2_dt_ids[] = { > + { .compatible = "brcm,kona-usb2-phy" }, > + { /* sentinel */ } > +}; > + > +MODULE_DEVICE_TABLE(of, bcm_kona_usb2_dt_ids); > + > +static struct platform_driver bcm_kona_usb2_driver = { > + .probe = bcm_kona_usb2_probe, > + .driver = { > + .name = "bcm-kona-usb2", > + .owner = THIS_MODULE, > + .of_match_table = bcm_kona_usb2_dt_ids, > + }, > +}; > + > +module_platform_driver(bcm_kona_usb2_driver); > + > +MODULE_ALIAS("platform:bcm-kona-usb2"); > +MODULE_AUTHOR("Matt Porter <matt.porter@linaro.org>"); > +MODULE_DESCRIPTION("BCM Kona USB 2.0 PHY driver"); > +MODULE_LICENSE("GPL v2"); > Apart from those comments, this patch looks good. Thanks Kishon
On Wed, Nov 27, 2013 at 02:21:52PM +0530, Kishon Vijay Abraham I wrote: > Hi, > > On Monday 25 November 2013 11:46 PM, Matt Porter wrote: > > Add a driver for the internal Broadcom Kona USB 2.0 PHY found > > on the BCM281xx family of SoCs. > > > > Signed-off-by: Matt Porter <matt.porter@linaro.org> > > --- > > drivers/phy/Kconfig | 6 ++ > > drivers/phy/Makefile | 1 + > > drivers/phy/phy-bcm-kona-usb2.c | 158 ++++++++++++++++++++++++++++++++++++++++ > > 3 files changed, 165 insertions(+) > > create mode 100644 drivers/phy/phy-bcm-kona-usb2.c > > > > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig > > index a344f3d..2e87fa8 100644 > > --- a/drivers/phy/Kconfig > > +++ b/drivers/phy/Kconfig > > @@ -51,4 +51,10 @@ config PHY_EXYNOS_DP_VIDEO > > help > > Support for Display Port PHY found on Samsung EXYNOS SoCs. > > > > +config BCM_KONA_USB2_PHY > > + tristate "Broadcom Kona USB2 PHY Driver" > > + depends on GENERIC_PHY > > + help > > + Enable this to support the Broadcom Kona USB 2.0 PHY. > > + > > endmenu > > diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile > > index d0caae9..c447f1a 100644 > > --- a/drivers/phy/Makefile > > +++ b/drivers/phy/Makefile > > @@ -3,6 +3,7 @@ > > # > > > > obj-$(CONFIG_GENERIC_PHY) += phy-core.o > > +obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o > > obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o > > obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o > > obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o > > diff --git a/drivers/phy/phy-bcm-kona-usb2.c b/drivers/phy/phy-bcm-kona-usb2.c > > new file mode 100644 > > index 0000000..2c54fb8 > > --- /dev/null > > +++ b/drivers/phy/phy-bcm-kona-usb2.c > > @@ -0,0 +1,158 @@ > > +/* > > + * phy-bcm-kona-usb2.c - Broadcom Kona USB2 Phy Driver > > + * > > + * Copyright (C) 2013 Linaro Limited > > + * Matt Porter <matt.porter@linaro.org> > > + * > > + * This software is licensed under the terms of the GNU General Public > > + * License version 2, as published by the Free Software Foundation, and > > + * may be copied, distributed, and modified under those terms. > > + * > > + * 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. > > + */ > > + > > +#include <linux/module.h> > > +#include <linux/of.h> > > +#include <linux/delay.h> > > +#include <linux/platform_device.h> > > +#include <linux/err.h> > > +#include <linux/io.h> > > +#include <linux/clk.h> > > +#include <linux/phy/phy.h> > > arrange the headers in alphabetical order so that it's easy while adding new > headers. Just my preference. yeah, same here. just development creep that I will address. > > + > > +#define OTGCTL (0) > > +#define OTGCTL_OTGSTAT2 (1 << 31) > > +#define OTGCTL_OTGSTAT1 (1 << 30) > > +#define OTGCTL_PRST_N_SW (1 << 11) > > +#define OTGCTL_HRESET_N (1 << 10) > > +#define OTGCTL_UTMI_LINE_STATE1 (1 << 9) > > +#define OTGCTL_UTMI_LINE_STATE0 (1 << 8) > > + > > +#define P1CTL (8) > > +#define P1CTL_SOFT_RESET (1 << 1) > > +#define P1CTL_NON_DRIVING (1 << 0) > > you can use BIT() instead. will do > > + > > +struct bcm_kona_usb { > > + void __iomem *regs; > > +}; > > + > > +static void bcm_kona_usb_phy_power(struct bcm_kona_usb *phy, int on) > > +{ > > + u32 val; > > + > > + val = readl(phy->regs + OTGCTL); > > + if (on) { > > + /* Configure and power PHY */ > > + val &= ~(OTGCTL_OTGSTAT2 | OTGCTL_OTGSTAT1 | > > + OTGCTL_UTMI_LINE_STATE1 | OTGCTL_UTMI_LINE_STATE0); > > + val |= OTGCTL_PRST_N_SW | OTGCTL_HRESET_N; > > + } else { > > + val &= ~(OTGCTL_PRST_N_SW | OTGCTL_HRESET_N); > > + } > > + writel(val, phy->regs + OTGCTL); > > +} > > + > > +static int bcm_kona_usb_phy_init(struct phy *gphy) > > +{ > > + struct bcm_kona_usb *phy = phy_get_drvdata(gphy); > > + u32 val; > > + > > + /* Soft reset PHY */ > > + val = readl(phy->regs + P1CTL); > > + val &= ~P1CTL_NON_DRIVING; > > + val |= P1CTL_SOFT_RESET; > > + writel(val, phy->regs + P1CTL); > > + writel(val & ~P1CTL_SOFT_RESET, phy->regs + P1CTL); > > + /* Reset needs to be asserted for 2ms */ > > + mdelay(2); > > + writel(val | P1CTL_SOFT_RESET, phy->regs + P1CTL); > > + > > + return 0; > > +} > > + > > +static int bcm_kona_usb_phy_power_on(struct phy *gphy) > > +{ > > + struct bcm_kona_usb *phy = phy_get_drvdata(gphy); > > + > > + bcm_kona_usb_phy_power(phy, 1); > > + > > + return 0; > > +} > > + > > +static int bcm_kona_usb_phy_power_off(struct phy *gphy) > > +{ > > + struct bcm_kona_usb *phy = phy_get_drvdata(gphy); > > + > > + bcm_kona_usb_phy_power(phy, 0); > > + > > + return 0; > > +} > > + > > +static struct phy_ops ops = { > > + .init = bcm_kona_usb_phy_init, > > + .power_on = bcm_kona_usb_phy_power_on, > > + .power_off = bcm_kona_usb_phy_power_off, > > + .owner = THIS_MODULE, > > owner is aligned differently.. ok > > +}; > > + > > +static int bcm_kona_usb2_probe(struct platform_device *pdev) > > +{ > > + struct device *dev = &pdev->dev; > > + struct bcm_kona_usb *phy; > > + struct resource *res; > > + struct phy *gphy; > > + struct phy_provider *phy_provider; > > + > > + phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); > > + if (!phy) > > + return -ENOMEM; > > + > > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > > + phy->regs = devm_ioremap_resource(&pdev->dev, res); > > + if (IS_ERR(phy->regs)) > > + return PTR_ERR(phy->regs); > > + > > + platform_set_drvdata(pdev, phy); > > + > > + phy_provider = devm_of_phy_provider_register(dev, > > + of_phy_simple_xlate); > > + if (IS_ERR(phy_provider)) > > + return PTR_ERR(phy_provider); > > + > > + gphy = devm_phy_create(dev, &ops, NULL); > > + if (IS_ERR(gphy)) > > + return PTR_ERR(gphy); > > + > > + /* The Kona PHY supports an 8-bit wide UTMI interface */ > > + phy_set_bus_width(gphy, 8); > > + > > + phy_set_drvdata(gphy, phy); > > + > > + return 0; > > +} > > + > > +static const struct of_device_id bcm_kona_usb2_dt_ids[] = { > > + { .compatible = "brcm,kona-usb2-phy" }, > > + { /* sentinel */ } > > +}; > > + > > +MODULE_DEVICE_TABLE(of, bcm_kona_usb2_dt_ids); > > + > > +static struct platform_driver bcm_kona_usb2_driver = { > > + .probe = bcm_kona_usb2_probe, > > + .driver = { > > + .name = "bcm-kona-usb2", > > + .owner = THIS_MODULE, > > + .of_match_table = bcm_kona_usb2_dt_ids, > > + }, > > +}; > > + > > +module_platform_driver(bcm_kona_usb2_driver); > > + > > +MODULE_ALIAS("platform:bcm-kona-usb2"); > > +MODULE_AUTHOR("Matt Porter <matt.porter@linaro.org>"); > > +MODULE_DESCRIPTION("BCM Kona USB 2.0 PHY driver"); > > +MODULE_LICENSE("GPL v2"); > > > Apart from those comments, this patch looks good. Ok, thanks much for all the reviews. -Matt
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index a344f3d..2e87fa8 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -51,4 +51,10 @@ config PHY_EXYNOS_DP_VIDEO help Support for Display Port PHY found on Samsung EXYNOS SoCs. +config BCM_KONA_USB2_PHY + tristate "Broadcom Kona USB2 PHY Driver" + depends on GENERIC_PHY + help + Enable this to support the Broadcom Kona USB 2.0 PHY. + endmenu diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index d0caae9..c447f1a 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -3,6 +3,7 @@ # obj-$(CONFIG_GENERIC_PHY) += phy-core.o +obj-$(CONFIG_BCM_KONA_USB2_PHY) += phy-bcm-kona-usb2.o obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o obj-$(CONFIG_OMAP_USB2) += phy-omap-usb2.o diff --git a/drivers/phy/phy-bcm-kona-usb2.c b/drivers/phy/phy-bcm-kona-usb2.c new file mode 100644 index 0000000..2c54fb8 --- /dev/null +++ b/drivers/phy/phy-bcm-kona-usb2.c @@ -0,0 +1,158 @@ +/* + * phy-bcm-kona-usb2.c - Broadcom Kona USB2 Phy Driver + * + * Copyright (C) 2013 Linaro Limited + * Matt Porter <matt.porter@linaro.org> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + */ + +#include <linux/module.h> +#include <linux/of.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/clk.h> +#include <linux/phy/phy.h> + +#define OTGCTL (0) +#define OTGCTL_OTGSTAT2 (1 << 31) +#define OTGCTL_OTGSTAT1 (1 << 30) +#define OTGCTL_PRST_N_SW (1 << 11) +#define OTGCTL_HRESET_N (1 << 10) +#define OTGCTL_UTMI_LINE_STATE1 (1 << 9) +#define OTGCTL_UTMI_LINE_STATE0 (1 << 8) + +#define P1CTL (8) +#define P1CTL_SOFT_RESET (1 << 1) +#define P1CTL_NON_DRIVING (1 << 0) + +struct bcm_kona_usb { + void __iomem *regs; +}; + +static void bcm_kona_usb_phy_power(struct bcm_kona_usb *phy, int on) +{ + u32 val; + + val = readl(phy->regs + OTGCTL); + if (on) { + /* Configure and power PHY */ + val &= ~(OTGCTL_OTGSTAT2 | OTGCTL_OTGSTAT1 | + OTGCTL_UTMI_LINE_STATE1 | OTGCTL_UTMI_LINE_STATE0); + val |= OTGCTL_PRST_N_SW | OTGCTL_HRESET_N; + } else { + val &= ~(OTGCTL_PRST_N_SW | OTGCTL_HRESET_N); + } + writel(val, phy->regs + OTGCTL); +} + +static int bcm_kona_usb_phy_init(struct phy *gphy) +{ + struct bcm_kona_usb *phy = phy_get_drvdata(gphy); + u32 val; + + /* Soft reset PHY */ + val = readl(phy->regs + P1CTL); + val &= ~P1CTL_NON_DRIVING; + val |= P1CTL_SOFT_RESET; + writel(val, phy->regs + P1CTL); + writel(val & ~P1CTL_SOFT_RESET, phy->regs + P1CTL); + /* Reset needs to be asserted for 2ms */ + mdelay(2); + writel(val | P1CTL_SOFT_RESET, phy->regs + P1CTL); + + return 0; +} + +static int bcm_kona_usb_phy_power_on(struct phy *gphy) +{ + struct bcm_kona_usb *phy = phy_get_drvdata(gphy); + + bcm_kona_usb_phy_power(phy, 1); + + return 0; +} + +static int bcm_kona_usb_phy_power_off(struct phy *gphy) +{ + struct bcm_kona_usb *phy = phy_get_drvdata(gphy); + + bcm_kona_usb_phy_power(phy, 0); + + return 0; +} + +static struct phy_ops ops = { + .init = bcm_kona_usb_phy_init, + .power_on = bcm_kona_usb_phy_power_on, + .power_off = bcm_kona_usb_phy_power_off, + .owner = THIS_MODULE, +}; + +static int bcm_kona_usb2_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct bcm_kona_usb *phy; + struct resource *res; + struct phy *gphy; + struct phy_provider *phy_provider; + + phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + phy->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(phy->regs)) + return PTR_ERR(phy->regs); + + platform_set_drvdata(pdev, phy); + + phy_provider = devm_of_phy_provider_register(dev, + of_phy_simple_xlate); + if (IS_ERR(phy_provider)) + return PTR_ERR(phy_provider); + + gphy = devm_phy_create(dev, &ops, NULL); + if (IS_ERR(gphy)) + return PTR_ERR(gphy); + + /* The Kona PHY supports an 8-bit wide UTMI interface */ + phy_set_bus_width(gphy, 8); + + phy_set_drvdata(gphy, phy); + + return 0; +} + +static const struct of_device_id bcm_kona_usb2_dt_ids[] = { + { .compatible = "brcm,kona-usb2-phy" }, + { /* sentinel */ } +}; + +MODULE_DEVICE_TABLE(of, bcm_kona_usb2_dt_ids); + +static struct platform_driver bcm_kona_usb2_driver = { + .probe = bcm_kona_usb2_probe, + .driver = { + .name = "bcm-kona-usb2", + .owner = THIS_MODULE, + .of_match_table = bcm_kona_usb2_dt_ids, + }, +}; + +module_platform_driver(bcm_kona_usb2_driver); + +MODULE_ALIAS("platform:bcm-kona-usb2"); +MODULE_AUTHOR("Matt Porter <matt.porter@linaro.org>"); +MODULE_DESCRIPTION("BCM Kona USB 2.0 PHY driver"); +MODULE_LICENSE("GPL v2");
Add a driver for the internal Broadcom Kona USB 2.0 PHY found on the BCM281xx family of SoCs. Signed-off-by: Matt Porter <matt.porter@linaro.org> --- drivers/phy/Kconfig | 6 ++ drivers/phy/Makefile | 1 + drivers/phy/phy-bcm-kona-usb2.c | 158 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 165 insertions(+) create mode 100644 drivers/phy/phy-bcm-kona-usb2.c