* [PATCH] phylib: mdio-ofgpio ---> mdio-gpio
@ 2008-10-31 15:53 Paulius Zaleckas
2008-10-31 16:06 ` Grant Likely
2008-10-31 17:26 ` David Brownell
0 siblings, 2 replies; 4+ messages in thread
From: Paulius Zaleckas @ 2008-10-31 15:53 UTC (permalink / raw)
To: netdev
Cc: linux-arm-kernel, linux-embedded, Paulius Zaleckas,
Laurent Pinchart, Grant Likely, Mike Frysinger
Rename mdio-ofgpio driver to mdio-gpio and make it work with
non OpenFirmware gpio implementation.
Aditional changes to mdio-ofgpio:
- use gpio_request() and gpio_free()
- place irq[] array in struct mdio_gpio_info
- add module description, author and license
- if NO_IRQ is not defined define it to 0
- add note about compiling this driver as module
- rename mdc and mdio function (were ugly names)
- change MII to MDIO in bus name
- add __init __exit to module (un)loading functions
- probe fails if no phys added to the bus
- kzalloc bitbang with sizeof(*bitbang)
Laurent, please test this driver under OF.
Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Cc: Laurent Pinchart <laurentp@cse-semaphore.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Mike Frysinger <vapier.adi@gmail.com>
---
drivers/net/phy/Kconfig | 7 +
drivers/net/phy/Makefile | 2
drivers/net/phy/mdio-gpio.c | 308 +++++++++++++++++++++++++++++++++++++++++
drivers/net/phy/mdio-ofgpio.c | 204 ---------------------------
include/linux/mdio-gpio.h | 30 ++++
5 files changed, 344 insertions(+), 207 deletions(-)
create mode 100644 drivers/net/phy/mdio-gpio.c
delete mode 100644 drivers/net/phy/mdio-ofgpio.c
create mode 100644 include/linux/mdio-gpio.h
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index d55932a..c4c5a2f 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -84,10 +84,13 @@ config MDIO_BITBANG
If in doubt, say N.
-config MDIO_OF_GPIO
+config MDIO_GPIO
tristate "Support for GPIO lib-based bitbanged MDIO buses"
- depends on MDIO_BITBANG && OF_GPIO
+ depends on MDIO_BITBANG && GENERIC_GPIO
---help---
Supports GPIO lib-based MDIO busses.
+ To compile this driver as a module, choose M here: the module
+ will be called mdio-gpio.
+
endif # PHYLIB
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index eee329f..9ae5d30 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -15,4 +15,4 @@ obj-$(CONFIG_ICPLUS_PHY) += icplus.o
obj-$(CONFIG_REALTEK_PHY) += realtek.o
obj-$(CONFIG_FIXED_PHY) += fixed.o
obj-$(CONFIG_MDIO_BITBANG) += mdio-bitbang.o
-obj-$(CONFIG_MDIO_OF_GPIO) += mdio-ofgpio.o
+obj-$(CONFIG_MDIO_GPIO) += mdio-gpio.o
diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c
new file mode 100644
index 0000000..a7b94ac
--- /dev/null
+++ b/drivers/net/phy/mdio-gpio.c
@@ -0,0 +1,308 @@
+/*
+ * GPIO based MDIO bitbang driver.
+ * Supports OpenFirmware.
+ *
+ * Copyright (c) 2008 CSE Semaphore Belgium.
+ * by Laurent Pinchart <laurentp@cse-semaphore.com>
+ *
+ * Copyright (C) 2008, Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+ *
+ * Based on earlier work by
+ *
+ * Copyright (c) 2003 Intracom S.A.
+ * by Pantelis Antoniou <panto@intracom.gr>
+ *
+ * 2005 (c) MontaVista Software, Inc.
+ * Vitaly Bordug <vbordug@ru.mvista.com>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/mdio-bitbang.h>
+#ifdef CONFIG_OF_GPIO
+# include <linux/of_gpio.h>
+# include <linux/of_platform.h>
+#else
+# include <linux/platform_device.h>
+# include <linux/gpio.h>
+# include <linux/mdio-gpio.h>
+#endif
+
+#ifndef NO_IRQ
+#define NO_IRQ 0
+#endif
+
+struct mdio_gpio_info {
+ struct mdiobb_ctrl ctrl;
+ int mdc, mdio;
+ int irq[PHY_MAX_ADDR];
+};
+
+static void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
+{
+ struct mdio_gpio_info *bitbang =
+ container_of(ctrl, struct mdio_gpio_info, ctrl);
+
+ if (dir)
+ gpio_direction_output(bitbang->mdio, 1);
+ else
+ gpio_direction_input(bitbang->mdio);
+}
+
+static int mdio_get(struct mdiobb_ctrl *ctrl)
+{
+ struct mdio_gpio_info *bitbang =
+ container_of(ctrl, struct mdio_gpio_info, ctrl);
+
+ return gpio_get_value(bitbang->mdio);
+}
+
+static void mdio_set(struct mdiobb_ctrl *ctrl, int what)
+{
+ struct mdio_gpio_info *bitbang =
+ container_of(ctrl, struct mdio_gpio_info, ctrl);
+
+ gpio_set_value(bitbang->mdio, what);
+}
+
+static void mdc_set(struct mdiobb_ctrl *ctrl, int what)
+{
+ struct mdio_gpio_info *bitbang =
+ container_of(ctrl, struct mdio_gpio_info, ctrl);
+
+ gpio_set_value(bitbang->mdc, what);
+}
+
+static struct mdiobb_ops mdio_gpio_ops = {
+ .owner = THIS_MODULE,
+ .set_mdc = mdc_set,
+ .set_mdio_dir = mdio_dir,
+ .set_mdio_data = mdio_set,
+ .get_mdio_data = mdio_get,
+};
+
+#ifdef CONFIG_OF_GPIO
+static int __devinit mdio_ofgpio_bitbang_init(struct mii_bus *bus,
+ struct device_node *np)
+{
+ struct mdio_gpio_info *bitbang = bus->priv;
+
+ bitbang->mdc = of_get_gpio(np, 0);
+ bitbang->mdio = of_get_gpio(np, 1);
+
+ if (bitbang->mdc < 0 || bitbang->mdio < 0)
+ return -ENODEV;
+
+ snprintf(bus->id, MII_BUS_ID_SIZE, "%x", bitbang->mdc);
+ return 0;
+}
+#else
+static void __devinit mdio_gpio_bitbang_init(struct mii_bus *bus,
+ struct mdio_gpio_platform_data *pdata,
+ int bus_id)
+{
+ struct mdio_gpio_info *bitbang = bus->priv;
+
+ bitbang->mdc = pdata->mdc;
+ bitbang->mdio = pdata->mdio;
+
+ snprintf(bus->id, MII_BUS_ID_SIZE, "phy%i", bus_id);
+}
+#endif
+
+static void __devinit add_phy(struct mii_bus *bus, unsigned int phy_addr,
+ int phy_irq)
+{
+ if (phy_addr >= PHY_MAX_ADDR) {
+ dev_err(bus->parent,
+ "Failed to add phy with invalid address: 0x%x",
+ phy_addr);
+ return;
+ }
+
+ bus->phy_mask &= ~(1 << phy_addr);
+
+ if (phy_irq != NO_IRQ)
+ bus->irq[phy_addr] = phy_irq;
+}
+
+#ifdef CONFIG_OF_GPIO
+static int __devinit mdio_ofgpio_probe(struct of_device *ofdev,
+ const struct of_device_id *match)
+{
+ struct device_node *np = NULL;
+ struct device *dev = &ofdev->dev;
+#else
+static int __devinit mdio_gpio_probe(struct platform_device *pdev)
+{
+ struct mdio_gpio_platform_data *pdata;
+ struct device *dev = &pdev->dev;
+#endif
+ struct mii_bus *new_bus;
+ struct mdio_gpio_info *bitbang;
+ int ret = -ENOMEM;
+ int i;
+
+#ifndef CONFIG_OF_GPIO
+ pdata = dev->platform_data;
+ if (pdata == NULL)
+ goto out;
+#endif
+
+ bitbang = kzalloc(sizeof(*bitbang), GFP_KERNEL);
+ if (!bitbang)
+ goto out;
+
+ bitbang->ctrl.ops = &mdio_gpio_ops;
+
+ new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
+ if (!new_bus)
+ goto out_free_bitbang;
+
+ new_bus->name = "GPIO Bitbanged MDIO",
+
+#ifdef CONFIG_OF_GPIO
+ ret = mdio_ofgpio_bitbang_init(new_bus, ofdev->node);
+ if (ret)
+ goto out_free_bus;
+#else
+ mdio_gpio_bitbang_init(new_bus, pdata, pdev->id);
+#endif
+
+ ret = -ENODEV;
+
+ if (gpio_request(bitbang->mdc, "mdc"))
+ goto out_free_bus;
+
+ if (gpio_request(bitbang->mdio, "mdio"))
+ goto out_free_mdc;
+
+ new_bus->phy_mask = ~0;
+ new_bus->irq = bitbang->irq;
+ new_bus->parent = dev;
+
+ for (i = 0; i < PHY_MAX_ADDR; i++)
+ new_bus->irq[i] = PHY_POLL;
+
+#ifdef CONFIG_OF_GPIO
+ while ((np = of_get_next_child(ofdev->node, np)))
+ if (!strcmp(np->type, "ethernet-phy")) {
+ const u32 *data;
+ int len;
+
+ data = of_get_property(np, "reg", &len);
+ if (!data || len != 4)
+ continue;
+
+ add_phy(new_bus, *data,
+ of_irq_to_resource(np, 0, NULL));
+ }
+#else
+ for (i = 0; i < pdata->nr_phys; i++)
+ add_phy(new_bus, pdata->phys[i].addr, pdata->phys[i].irq);
+#endif
+
+ if (new_bus->phy_mask == ~0)
+ goto out_free_gpio;
+
+ dev_set_drvdata(dev, new_bus);
+
+ ret = mdiobus_register(new_bus);
+ if (ret)
+ goto out_free_all;
+
+ return 0;
+
+out_free_all:
+ dev_set_drvdata(dev, NULL);
+out_free_gpio:
+ gpio_free(bitbang->mdio);
+out_free_mdc:
+ gpio_free(bitbang->mdc);
+out_free_bus:
+ free_mdio_bitbang(new_bus);
+out_free_bitbang:
+ kfree(bitbang);
+out:
+ return ret;
+}
+
+#ifdef CONFIG_OF_GPIO
+static int mdio_ofgpio_remove(struct of_device *ofdev)
+{
+ struct device *dev = &ofdev->dev;
+#else
+static int __devexit mdio_gpio_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+#endif
+ struct mii_bus *bus = dev_get_drvdata(dev);
+ struct mdio_gpio_info *bitbang = bus->priv;
+
+ mdiobus_unregister(bus);
+ free_mdio_bitbang(bus);
+ dev_set_drvdata(dev, NULL);
+ gpio_free(bitbang->mdc);
+ gpio_free(bitbang->mdio);
+ kfree(bitbang);
+
+ return 0;
+}
+
+#ifdef CONFIG_OF_GPIO
+static struct of_device_id mdio_ofgpio_match[] = {
+ {
+ .compatible = "virtual,mdio-gpio",
+ },
+ {},
+};
+
+static struct of_platform_driver mdio_ofgpio_driver = {
+ .name = "mdio-gpio",
+ .match_table = mdio_ofgpio_match,
+ .probe = mdio_ofgpio_probe,
+ .remove = mdio_ofgpio_remove,
+};
+#else
+static struct platform_driver mdio_gpio_driver = {
+ .probe = mdio_gpio_probe,
+ .remove = __devexit_p(mdio_gpio_remove),
+ .driver = {
+ .name = "mdio-gpio",
+ .owner = THIS_MODULE,
+ },
+};
+#endif
+
+static int __init mdio_gpio_init(void)
+{
+#ifdef CONFIG_OF_GPIO
+ return of_register_platform_driver(&mdio_ofgpio_driver);
+#else
+ return platform_driver_register(&mdio_gpio_driver);
+#endif
+}
+module_init(mdio_gpio_init);
+
+static void __exit mdio_gpio_exit(void)
+{
+#ifdef CONFIG_OF_GPIO
+ of_unregister_platform_driver(&mdio_ofgpio_driver);
+#else
+ platform_driver_unregister(&mdio_gpio_driver);
+#endif
+}
+module_exit(mdio_gpio_exit);
+
+#ifndef CONFIG_OF_GPIO
+MODULE_ALIAS("platform:mdio-gpio");
+#endif
+MODULE_AUTHOR("Laurent Pinchart, Paulius Zaleckas");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Generic driver for MDIO bus emulation using GPIO");
diff --git a/drivers/net/phy/mdio-ofgpio.c b/drivers/net/phy/mdio-ofgpio.c
deleted file mode 100644
index 2ff9775..0000000
--- a/drivers/net/phy/mdio-ofgpio.c
+++ /dev/null
@@ -1,204 +0,0 @@
-/*
- * OpenFirmware GPIO based MDIO bitbang driver.
- *
- * Copyright (c) 2008 CSE Semaphore Belgium.
- * by Laurent Pinchart <laurentp@cse-semaphore.com>
- *
- * Based on earlier work by
- *
- * Copyright (c) 2003 Intracom S.A.
- * by Pantelis Antoniou <panto@intracom.gr>
- *
- * 2005 (c) MontaVista Software, Inc.
- * Vitaly Bordug <vbordug@ru.mvista.com>
- *
- * This file is licensed under the terms of the GNU General Public License
- * version 2. This program is licensed "as is" without any warranty of any
- * kind, whether express or implied.
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/mdio-bitbang.h>
-#include <linux/of_gpio.h>
-#include <linux/of_platform.h>
-
-struct mdio_gpio_info {
- struct mdiobb_ctrl ctrl;
- int mdc, mdio;
-};
-
-static void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
-{
- struct mdio_gpio_info *bitbang =
- container_of(ctrl, struct mdio_gpio_info, ctrl);
-
- if (dir)
- gpio_direction_output(bitbang->mdio, 1);
- else
- gpio_direction_input(bitbang->mdio);
-}
-
-static int mdio_read(struct mdiobb_ctrl *ctrl)
-{
- struct mdio_gpio_info *bitbang =
- container_of(ctrl, struct mdio_gpio_info, ctrl);
-
- return gpio_get_value(bitbang->mdio);
-}
-
-static void mdio(struct mdiobb_ctrl *ctrl, int what)
-{
- struct mdio_gpio_info *bitbang =
- container_of(ctrl, struct mdio_gpio_info, ctrl);
-
- gpio_set_value(bitbang->mdio, what);
-}
-
-static void mdc(struct mdiobb_ctrl *ctrl, int what)
-{
- struct mdio_gpio_info *bitbang =
- container_of(ctrl, struct mdio_gpio_info, ctrl);
-
- gpio_set_value(bitbang->mdc, what);
-}
-
-static struct mdiobb_ops mdio_gpio_ops = {
- .owner = THIS_MODULE,
- .set_mdc = mdc,
- .set_mdio_dir = mdio_dir,
- .set_mdio_data = mdio,
- .get_mdio_data = mdio_read,
-};
-
-static int __devinit mdio_ofgpio_bitbang_init(struct mii_bus *bus,
- struct device_node *np)
-{
- struct mdio_gpio_info *bitbang = bus->priv;
-
- bitbang->mdc = of_get_gpio(np, 0);
- bitbang->mdio = of_get_gpio(np, 1);
-
- if (bitbang->mdc < 0 || bitbang->mdio < 0)
- return -ENODEV;
-
- snprintf(bus->id, MII_BUS_ID_SIZE, "%x", bitbang->mdc);
- return 0;
-}
-
-static void __devinit add_phy(struct mii_bus *bus, struct device_node *np)
-{
- const u32 *data;
- int len, id, irq;
-
- data = of_get_property(np, "reg", &len);
- if (!data || len != 4)
- return;
-
- id = *data;
- bus->phy_mask &= ~(1 << id);
-
- irq = of_irq_to_resource(np, 0, NULL);
- if (irq != NO_IRQ)
- bus->irq[id] = irq;
-}
-
-static int __devinit mdio_ofgpio_probe(struct of_device *ofdev,
- const struct of_device_id *match)
-{
- struct device_node *np = NULL;
- struct mii_bus *new_bus;
- struct mdio_gpio_info *bitbang;
- int ret = -ENOMEM;
- int i;
-
- bitbang = kzalloc(sizeof(struct mdio_gpio_info), GFP_KERNEL);
- if (!bitbang)
- goto out;
-
- bitbang->ctrl.ops = &mdio_gpio_ops;
-
- new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
- if (!new_bus)
- goto out_free_bitbang;
-
- new_bus->name = "GPIO Bitbanged MII",
-
- ret = mdio_ofgpio_bitbang_init(new_bus, ofdev->node);
- if (ret)
- goto out_free_bus;
-
- new_bus->phy_mask = ~0;
- new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
- if (!new_bus->irq)
- goto out_free_bus;
-
- for (i = 0; i < PHY_MAX_ADDR; i++)
- new_bus->irq[i] = -1;
-
- while ((np = of_get_next_child(ofdev->node, np)))
- if (!strcmp(np->type, "ethernet-phy"))
- add_phy(new_bus, np);
-
- new_bus->parent = &ofdev->dev;
- dev_set_drvdata(&ofdev->dev, new_bus);
-
- ret = mdiobus_register(new_bus);
- if (ret)
- goto out_free_irqs;
-
- return 0;
-
-out_free_irqs:
- dev_set_drvdata(&ofdev->dev, NULL);
- kfree(new_bus->irq);
-out_free_bus:
- free_mdio_bitbang(new_bus);
-out_free_bitbang:
- kfree(bitbang);
-out:
- return ret;
-}
-
-static int mdio_ofgpio_remove(struct of_device *ofdev)
-{
- struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
- struct mdio_gpio_info *bitbang = bus->priv;
-
- mdiobus_unregister(bus);
- kfree(bus->irq);
- free_mdio_bitbang(bus);
- dev_set_drvdata(&ofdev->dev, NULL);
- kfree(bitbang);
-
- return 0;
-}
-
-static struct of_device_id mdio_ofgpio_match[] = {
- {
- .compatible = "virtual,mdio-gpio",
- },
- {},
-};
-
-static struct of_platform_driver mdio_ofgpio_driver = {
- .name = "mdio-gpio",
- .match_table = mdio_ofgpio_match,
- .probe = mdio_ofgpio_probe,
- .remove = mdio_ofgpio_remove,
-};
-
-static int mdio_ofgpio_init(void)
-{
- return of_register_platform_driver(&mdio_ofgpio_driver);
-}
-
-static void mdio_ofgpio_exit(void)
-{
- of_unregister_platform_driver(&mdio_ofgpio_driver);
-}
-
-module_init(mdio_ofgpio_init);
-module_exit(mdio_ofgpio_exit);
diff --git a/include/linux/mdio-gpio.h b/include/linux/mdio-gpio.h
new file mode 100644
index 0000000..5ca24ed
--- /dev/null
+++ b/include/linux/mdio-gpio.h
@@ -0,0 +1,30 @@
+/*
+ * MDIO-GPIO bus platform data structures
+ *
+ * Copyright (C) 2008, Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#ifndef __LINUX_MDIO_GPIO_H
+#define __LINUX_MDIO_GPIO_H
+
+struct mdio_gpio_phy {
+ /* PHY address on MDIO bus */
+ unsigned int addr;
+ /* preconfigured irq connected to PHY or -1 if no irq */
+ int irq;
+};
+
+struct mdio_gpio_platform_data {
+ /* GPIO numbers for bus pins */
+ unsigned int mdc;
+ unsigned int mdio;
+
+ unsigned int nr_phys;
+ struct mdio_gpio_phy *phys;
+};
+
+#endif /* __LINUX_MDIO_GPIO_H */
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] phylib: mdio-ofgpio ---> mdio-gpio
2008-10-31 15:53 [PATCH] phylib: mdio-ofgpio ---> mdio-gpio Paulius Zaleckas
@ 2008-10-31 16:06 ` Grant Likely
2008-10-31 16:49 ` Russell King - ARM Linux
2008-10-31 17:26 ` David Brownell
1 sibling, 1 reply; 4+ messages in thread
From: Grant Likely @ 2008-10-31 16:06 UTC (permalink / raw)
To: Paulius Zaleckas
Cc: netdev, linux-arm-kernel, linux-embedded, Laurent Pinchart,
Mike Frysinger
On Fri, Oct 31, 2008 at 9:53 AM, Paulius Zaleckas
<paulius.zaleckas@teltonika.lt> wrote:
> Rename mdio-ofgpio driver to mdio-gpio and make it work with
> non OpenFirmware gpio implementation.
Please respin this patch in 2 pieces; 1 patch to move the file and 1
patch to make the changes. It is difficult to review as a single
patch.
g.
>
> Aditional changes to mdio-ofgpio:
> - use gpio_request() and gpio_free()
> - place irq[] array in struct mdio_gpio_info
> - add module description, author and license
> - if NO_IRQ is not defined define it to 0
> - add note about compiling this driver as module
> - rename mdc and mdio function (were ugly names)
> - change MII to MDIO in bus name
> - add __init __exit to module (un)loading functions
> - probe fails if no phys added to the bus
> - kzalloc bitbang with sizeof(*bitbang)
>
> Laurent, please test this driver under OF.
>
> Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
> Cc: Laurent Pinchart <laurentp@cse-semaphore.com>
> Cc: Grant Likely <grant.likely@secretlab.ca>
> Cc: Mike Frysinger <vapier.adi@gmail.com>
> ---
>
> drivers/net/phy/Kconfig | 7 +
> drivers/net/phy/Makefile | 2
> drivers/net/phy/mdio-gpio.c | 308 +++++++++++++++++++++++++++++++++++++++++
> drivers/net/phy/mdio-ofgpio.c | 204 ---------------------------
> include/linux/mdio-gpio.h | 30 ++++
> 5 files changed, 344 insertions(+), 207 deletions(-)
> create mode 100644 drivers/net/phy/mdio-gpio.c
> delete mode 100644 drivers/net/phy/mdio-ofgpio.c
> create mode 100644 include/linux/mdio-gpio.h
>
>
> diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
> index d55932a..c4c5a2f 100644
> --- a/drivers/net/phy/Kconfig
> +++ b/drivers/net/phy/Kconfig
> @@ -84,10 +84,13 @@ config MDIO_BITBANG
>
> If in doubt, say N.
>
> -config MDIO_OF_GPIO
> +config MDIO_GPIO
> tristate "Support for GPIO lib-based bitbanged MDIO buses"
> - depends on MDIO_BITBANG && OF_GPIO
> + depends on MDIO_BITBANG && GENERIC_GPIO
> ---help---
> Supports GPIO lib-based MDIO busses.
>
> + To compile this driver as a module, choose M here: the module
> + will be called mdio-gpio.
> +
> endif # PHYLIB
> diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
> index eee329f..9ae5d30 100644
> --- a/drivers/net/phy/Makefile
> +++ b/drivers/net/phy/Makefile
> @@ -15,4 +15,4 @@ obj-$(CONFIG_ICPLUS_PHY) += icplus.o
> obj-$(CONFIG_REALTEK_PHY) += realtek.o
> obj-$(CONFIG_FIXED_PHY) += fixed.o
> obj-$(CONFIG_MDIO_BITBANG) += mdio-bitbang.o
> -obj-$(CONFIG_MDIO_OF_GPIO) += mdio-ofgpio.o
> +obj-$(CONFIG_MDIO_GPIO) += mdio-gpio.o
> diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c
> new file mode 100644
> index 0000000..a7b94ac
> --- /dev/null
> +++ b/drivers/net/phy/mdio-gpio.c
> @@ -0,0 +1,308 @@
> +/*
> + * GPIO based MDIO bitbang driver.
> + * Supports OpenFirmware.
> + *
> + * Copyright (c) 2008 CSE Semaphore Belgium.
> + * by Laurent Pinchart <laurentp@cse-semaphore.com>
> + *
> + * Copyright (C) 2008, Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
> + *
> + * Based on earlier work by
> + *
> + * Copyright (c) 2003 Intracom S.A.
> + * by Pantelis Antoniou <panto@intracom.gr>
> + *
> + * 2005 (c) MontaVista Software, Inc.
> + * Vitaly Bordug <vbordug@ru.mvista.com>
> + *
> + * This file is licensed under the terms of the GNU General Public License
> + * version 2. This program is licensed "as is" without any warranty of any
> + * kind, whether express or implied.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/slab.h>
> +#include <linux/init.h>
> +#include <linux/interrupt.h>
> +#include <linux/mdio-bitbang.h>
> +#ifdef CONFIG_OF_GPIO
> +# include <linux/of_gpio.h>
> +# include <linux/of_platform.h>
> +#else
> +# include <linux/platform_device.h>
> +# include <linux/gpio.h>
> +# include <linux/mdio-gpio.h>
> +#endif
> +
> +#ifndef NO_IRQ
> +#define NO_IRQ 0
> +#endif
> +
> +struct mdio_gpio_info {
> + struct mdiobb_ctrl ctrl;
> + int mdc, mdio;
> + int irq[PHY_MAX_ADDR];
> +};
> +
> +static void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
> +{
> + struct mdio_gpio_info *bitbang =
> + container_of(ctrl, struct mdio_gpio_info, ctrl);
> +
> + if (dir)
> + gpio_direction_output(bitbang->mdio, 1);
> + else
> + gpio_direction_input(bitbang->mdio);
> +}
> +
> +static int mdio_get(struct mdiobb_ctrl *ctrl)
> +{
> + struct mdio_gpio_info *bitbang =
> + container_of(ctrl, struct mdio_gpio_info, ctrl);
> +
> + return gpio_get_value(bitbang->mdio);
> +}
> +
> +static void mdio_set(struct mdiobb_ctrl *ctrl, int what)
> +{
> + struct mdio_gpio_info *bitbang =
> + container_of(ctrl, struct mdio_gpio_info, ctrl);
> +
> + gpio_set_value(bitbang->mdio, what);
> +}
> +
> +static void mdc_set(struct mdiobb_ctrl *ctrl, int what)
> +{
> + struct mdio_gpio_info *bitbang =
> + container_of(ctrl, struct mdio_gpio_info, ctrl);
> +
> + gpio_set_value(bitbang->mdc, what);
> +}
> +
> +static struct mdiobb_ops mdio_gpio_ops = {
> + .owner = THIS_MODULE,
> + .set_mdc = mdc_set,
> + .set_mdio_dir = mdio_dir,
> + .set_mdio_data = mdio_set,
> + .get_mdio_data = mdio_get,
> +};
> +
> +#ifdef CONFIG_OF_GPIO
> +static int __devinit mdio_ofgpio_bitbang_init(struct mii_bus *bus,
> + struct device_node *np)
> +{
> + struct mdio_gpio_info *bitbang = bus->priv;
> +
> + bitbang->mdc = of_get_gpio(np, 0);
> + bitbang->mdio = of_get_gpio(np, 1);
> +
> + if (bitbang->mdc < 0 || bitbang->mdio < 0)
> + return -ENODEV;
> +
> + snprintf(bus->id, MII_BUS_ID_SIZE, "%x", bitbang->mdc);
> + return 0;
> +}
> +#else
> +static void __devinit mdio_gpio_bitbang_init(struct mii_bus *bus,
> + struct mdio_gpio_platform_data *pdata,
> + int bus_id)
> +{
> + struct mdio_gpio_info *bitbang = bus->priv;
> +
> + bitbang->mdc = pdata->mdc;
> + bitbang->mdio = pdata->mdio;
> +
> + snprintf(bus->id, MII_BUS_ID_SIZE, "phy%i", bus_id);
> +}
> +#endif
> +
> +static void __devinit add_phy(struct mii_bus *bus, unsigned int phy_addr,
> + int phy_irq)
> +{
> + if (phy_addr >= PHY_MAX_ADDR) {
> + dev_err(bus->parent,
> + "Failed to add phy with invalid address: 0x%x",
> + phy_addr);
> + return;
> + }
> +
> + bus->phy_mask &= ~(1 << phy_addr);
> +
> + if (phy_irq != NO_IRQ)
> + bus->irq[phy_addr] = phy_irq;
> +}
> +
> +#ifdef CONFIG_OF_GPIO
> +static int __devinit mdio_ofgpio_probe(struct of_device *ofdev,
> + const struct of_device_id *match)
> +{
> + struct device_node *np = NULL;
> + struct device *dev = &ofdev->dev;
> +#else
> +static int __devinit mdio_gpio_probe(struct platform_device *pdev)
> +{
> + struct mdio_gpio_platform_data *pdata;
> + struct device *dev = &pdev->dev;
> +#endif
> + struct mii_bus *new_bus;
> + struct mdio_gpio_info *bitbang;
> + int ret = -ENOMEM;
> + int i;
> +
> +#ifndef CONFIG_OF_GPIO
> + pdata = dev->platform_data;
> + if (pdata == NULL)
> + goto out;
> +#endif
> +
> + bitbang = kzalloc(sizeof(*bitbang), GFP_KERNEL);
> + if (!bitbang)
> + goto out;
> +
> + bitbang->ctrl.ops = &mdio_gpio_ops;
> +
> + new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
> + if (!new_bus)
> + goto out_free_bitbang;
> +
> + new_bus->name = "GPIO Bitbanged MDIO",
> +
> +#ifdef CONFIG_OF_GPIO
> + ret = mdio_ofgpio_bitbang_init(new_bus, ofdev->node);
> + if (ret)
> + goto out_free_bus;
> +#else
> + mdio_gpio_bitbang_init(new_bus, pdata, pdev->id);
> +#endif
> +
> + ret = -ENODEV;
> +
> + if (gpio_request(bitbang->mdc, "mdc"))
> + goto out_free_bus;
> +
> + if (gpio_request(bitbang->mdio, "mdio"))
> + goto out_free_mdc;
> +
> + new_bus->phy_mask = ~0;
> + new_bus->irq = bitbang->irq;
> + new_bus->parent = dev;
> +
> + for (i = 0; i < PHY_MAX_ADDR; i++)
> + new_bus->irq[i] = PHY_POLL;
> +
> +#ifdef CONFIG_OF_GPIO
> + while ((np = of_get_next_child(ofdev->node, np)))
> + if (!strcmp(np->type, "ethernet-phy")) {
> + const u32 *data;
> + int len;
> +
> + data = of_get_property(np, "reg", &len);
> + if (!data || len != 4)
> + continue;
> +
> + add_phy(new_bus, *data,
> + of_irq_to_resource(np, 0, NULL));
> + }
> +#else
> + for (i = 0; i < pdata->nr_phys; i++)
> + add_phy(new_bus, pdata->phys[i].addr, pdata->phys[i].irq);
> +#endif
> +
> + if (new_bus->phy_mask == ~0)
> + goto out_free_gpio;
> +
> + dev_set_drvdata(dev, new_bus);
> +
> + ret = mdiobus_register(new_bus);
> + if (ret)
> + goto out_free_all;
> +
> + return 0;
> +
> +out_free_all:
> + dev_set_drvdata(dev, NULL);
> +out_free_gpio:
> + gpio_free(bitbang->mdio);
> +out_free_mdc:
> + gpio_free(bitbang->mdc);
> +out_free_bus:
> + free_mdio_bitbang(new_bus);
> +out_free_bitbang:
> + kfree(bitbang);
> +out:
> + return ret;
> +}
> +
> +#ifdef CONFIG_OF_GPIO
> +static int mdio_ofgpio_remove(struct of_device *ofdev)
> +{
> + struct device *dev = &ofdev->dev;
> +#else
> +static int __devexit mdio_gpio_remove(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> +#endif
> + struct mii_bus *bus = dev_get_drvdata(dev);
> + struct mdio_gpio_info *bitbang = bus->priv;
> +
> + mdiobus_unregister(bus);
> + free_mdio_bitbang(bus);
> + dev_set_drvdata(dev, NULL);
> + gpio_free(bitbang->mdc);
> + gpio_free(bitbang->mdio);
> + kfree(bitbang);
> +
> + return 0;
> +}
> +
> +#ifdef CONFIG_OF_GPIO
> +static struct of_device_id mdio_ofgpio_match[] = {
> + {
> + .compatible = "virtual,mdio-gpio",
> + },
> + {},
> +};
> +
> +static struct of_platform_driver mdio_ofgpio_driver = {
> + .name = "mdio-gpio",
> + .match_table = mdio_ofgpio_match,
> + .probe = mdio_ofgpio_probe,
> + .remove = mdio_ofgpio_remove,
> +};
> +#else
> +static struct platform_driver mdio_gpio_driver = {
> + .probe = mdio_gpio_probe,
> + .remove = __devexit_p(mdio_gpio_remove),
> + .driver = {
> + .name = "mdio-gpio",
> + .owner = THIS_MODULE,
> + },
> +};
> +#endif
> +
> +static int __init mdio_gpio_init(void)
> +{
> +#ifdef CONFIG_OF_GPIO
> + return of_register_platform_driver(&mdio_ofgpio_driver);
> +#else
> + return platform_driver_register(&mdio_gpio_driver);
> +#endif
> +}
> +module_init(mdio_gpio_init);
> +
> +static void __exit mdio_gpio_exit(void)
> +{
> +#ifdef CONFIG_OF_GPIO
> + of_unregister_platform_driver(&mdio_ofgpio_driver);
> +#else
> + platform_driver_unregister(&mdio_gpio_driver);
> +#endif
> +}
> +module_exit(mdio_gpio_exit);
> +
> +#ifndef CONFIG_OF_GPIO
> +MODULE_ALIAS("platform:mdio-gpio");
> +#endif
> +MODULE_AUTHOR("Laurent Pinchart, Paulius Zaleckas");
> +MODULE_LICENSE("GPL");
> +MODULE_DESCRIPTION("Generic driver for MDIO bus emulation using GPIO");
> diff --git a/drivers/net/phy/mdio-ofgpio.c b/drivers/net/phy/mdio-ofgpio.c
> deleted file mode 100644
> index 2ff9775..0000000
> --- a/drivers/net/phy/mdio-ofgpio.c
> +++ /dev/null
> @@ -1,204 +0,0 @@
> -/*
> - * OpenFirmware GPIO based MDIO bitbang driver.
> - *
> - * Copyright (c) 2008 CSE Semaphore Belgium.
> - * by Laurent Pinchart <laurentp@cse-semaphore.com>
> - *
> - * Based on earlier work by
> - *
> - * Copyright (c) 2003 Intracom S.A.
> - * by Pantelis Antoniou <panto@intracom.gr>
> - *
> - * 2005 (c) MontaVista Software, Inc.
> - * Vitaly Bordug <vbordug@ru.mvista.com>
> - *
> - * This file is licensed under the terms of the GNU General Public License
> - * version 2. This program is licensed "as is" without any warranty of any
> - * kind, whether express or implied.
> - */
> -
> -#include <linux/module.h>
> -#include <linux/slab.h>
> -#include <linux/init.h>
> -#include <linux/interrupt.h>
> -#include <linux/mdio-bitbang.h>
> -#include <linux/of_gpio.h>
> -#include <linux/of_platform.h>
> -
> -struct mdio_gpio_info {
> - struct mdiobb_ctrl ctrl;
> - int mdc, mdio;
> -};
> -
> -static void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
> -{
> - struct mdio_gpio_info *bitbang =
> - container_of(ctrl, struct mdio_gpio_info, ctrl);
> -
> - if (dir)
> - gpio_direction_output(bitbang->mdio, 1);
> - else
> - gpio_direction_input(bitbang->mdio);
> -}
> -
> -static int mdio_read(struct mdiobb_ctrl *ctrl)
> -{
> - struct mdio_gpio_info *bitbang =
> - container_of(ctrl, struct mdio_gpio_info, ctrl);
> -
> - return gpio_get_value(bitbang->mdio);
> -}
> -
> -static void mdio(struct mdiobb_ctrl *ctrl, int what)
> -{
> - struct mdio_gpio_info *bitbang =
> - container_of(ctrl, struct mdio_gpio_info, ctrl);
> -
> - gpio_set_value(bitbang->mdio, what);
> -}
> -
> -static void mdc(struct mdiobb_ctrl *ctrl, int what)
> -{
> - struct mdio_gpio_info *bitbang =
> - container_of(ctrl, struct mdio_gpio_info, ctrl);
> -
> - gpio_set_value(bitbang->mdc, what);
> -}
> -
> -static struct mdiobb_ops mdio_gpio_ops = {
> - .owner = THIS_MODULE,
> - .set_mdc = mdc,
> - .set_mdio_dir = mdio_dir,
> - .set_mdio_data = mdio,
> - .get_mdio_data = mdio_read,
> -};
> -
> -static int __devinit mdio_ofgpio_bitbang_init(struct mii_bus *bus,
> - struct device_node *np)
> -{
> - struct mdio_gpio_info *bitbang = bus->priv;
> -
> - bitbang->mdc = of_get_gpio(np, 0);
> - bitbang->mdio = of_get_gpio(np, 1);
> -
> - if (bitbang->mdc < 0 || bitbang->mdio < 0)
> - return -ENODEV;
> -
> - snprintf(bus->id, MII_BUS_ID_SIZE, "%x", bitbang->mdc);
> - return 0;
> -}
> -
> -static void __devinit add_phy(struct mii_bus *bus, struct device_node *np)
> -{
> - const u32 *data;
> - int len, id, irq;
> -
> - data = of_get_property(np, "reg", &len);
> - if (!data || len != 4)
> - return;
> -
> - id = *data;
> - bus->phy_mask &= ~(1 << id);
> -
> - irq = of_irq_to_resource(np, 0, NULL);
> - if (irq != NO_IRQ)
> - bus->irq[id] = irq;
> -}
> -
> -static int __devinit mdio_ofgpio_probe(struct of_device *ofdev,
> - const struct of_device_id *match)
> -{
> - struct device_node *np = NULL;
> - struct mii_bus *new_bus;
> - struct mdio_gpio_info *bitbang;
> - int ret = -ENOMEM;
> - int i;
> -
> - bitbang = kzalloc(sizeof(struct mdio_gpio_info), GFP_KERNEL);
> - if (!bitbang)
> - goto out;
> -
> - bitbang->ctrl.ops = &mdio_gpio_ops;
> -
> - new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
> - if (!new_bus)
> - goto out_free_bitbang;
> -
> - new_bus->name = "GPIO Bitbanged MII",
> -
> - ret = mdio_ofgpio_bitbang_init(new_bus, ofdev->node);
> - if (ret)
> - goto out_free_bus;
> -
> - new_bus->phy_mask = ~0;
> - new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
> - if (!new_bus->irq)
> - goto out_free_bus;
> -
> - for (i = 0; i < PHY_MAX_ADDR; i++)
> - new_bus->irq[i] = -1;
> -
> - while ((np = of_get_next_child(ofdev->node, np)))
> - if (!strcmp(np->type, "ethernet-phy"))
> - add_phy(new_bus, np);
> -
> - new_bus->parent = &ofdev->dev;
> - dev_set_drvdata(&ofdev->dev, new_bus);
> -
> - ret = mdiobus_register(new_bus);
> - if (ret)
> - goto out_free_irqs;
> -
> - return 0;
> -
> -out_free_irqs:
> - dev_set_drvdata(&ofdev->dev, NULL);
> - kfree(new_bus->irq);
> -out_free_bus:
> - free_mdio_bitbang(new_bus);
> -out_free_bitbang:
> - kfree(bitbang);
> -out:
> - return ret;
> -}
> -
> -static int mdio_ofgpio_remove(struct of_device *ofdev)
> -{
> - struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
> - struct mdio_gpio_info *bitbang = bus->priv;
> -
> - mdiobus_unregister(bus);
> - kfree(bus->irq);
> - free_mdio_bitbang(bus);
> - dev_set_drvdata(&ofdev->dev, NULL);
> - kfree(bitbang);
> -
> - return 0;
> -}
> -
> -static struct of_device_id mdio_ofgpio_match[] = {
> - {
> - .compatible = "virtual,mdio-gpio",
> - },
> - {},
> -};
> -
> -static struct of_platform_driver mdio_ofgpio_driver = {
> - .name = "mdio-gpio",
> - .match_table = mdio_ofgpio_match,
> - .probe = mdio_ofgpio_probe,
> - .remove = mdio_ofgpio_remove,
> -};
> -
> -static int mdio_ofgpio_init(void)
> -{
> - return of_register_platform_driver(&mdio_ofgpio_driver);
> -}
> -
> -static void mdio_ofgpio_exit(void)
> -{
> - of_unregister_platform_driver(&mdio_ofgpio_driver);
> -}
> -
> -module_init(mdio_ofgpio_init);
> -module_exit(mdio_ofgpio_exit);
> diff --git a/include/linux/mdio-gpio.h b/include/linux/mdio-gpio.h
> new file mode 100644
> index 0000000..5ca24ed
> --- /dev/null
> +++ b/include/linux/mdio-gpio.h
> @@ -0,0 +1,30 @@
> +/*
> + * MDIO-GPIO bus platform data structures
> + *
> + * Copyright (C) 2008, Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
> + *
> + * This file is licensed under the terms of the GNU General Public License
> + * version 2. This program is licensed "as is" without any warranty of any
> + * kind, whether express or implied.
> + */
> +
> +#ifndef __LINUX_MDIO_GPIO_H
> +#define __LINUX_MDIO_GPIO_H
> +
> +struct mdio_gpio_phy {
> + /* PHY address on MDIO bus */
> + unsigned int addr;
> + /* preconfigured irq connected to PHY or -1 if no irq */
> + int irq;
> +};
> +
> +struct mdio_gpio_platform_data {
> + /* GPIO numbers for bus pins */
> + unsigned int mdc;
> + unsigned int mdio;
> +
> + unsigned int nr_phys;
> + struct mdio_gpio_phy *phys;
> +};
> +
> +#endif /* __LINUX_MDIO_GPIO_H */
>
>
--
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] phylib: mdio-ofgpio ---> mdio-gpio
2008-10-31 16:06 ` Grant Likely
@ 2008-10-31 16:49 ` Russell King - ARM Linux
0 siblings, 0 replies; 4+ messages in thread
From: Russell King - ARM Linux @ 2008-10-31 16:49 UTC (permalink / raw)
To: Grant Likely
Cc: Paulius Zaleckas, netdev, linux-arm-kernel, linux-embedded,
Laurent Pinchart, Mike Frysinger
On Fri, Oct 31, 2008 at 10:06:26AM -0600, Grant Likely wrote:
> On Fri, Oct 31, 2008 at 9:53 AM, Paulius Zaleckas
> <paulius.zaleckas@teltonika.lt> wrote:
> > Rename mdio-ofgpio driver to mdio-gpio and make it work with
> > non OpenFirmware gpio implementation.
>
> Please respin this patch in 2 pieces; 1 patch to move the file and 1
> patch to make the changes. It is difficult to review as a single
> patch.
Or ask for the diffs to be in git format (iow, using git diff -M).
Don't know if git-send-email can do that.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] phylib: mdio-ofgpio ---> mdio-gpio
2008-10-31 15:53 [PATCH] phylib: mdio-ofgpio ---> mdio-gpio Paulius Zaleckas
2008-10-31 16:06 ` Grant Likely
@ 2008-10-31 17:26 ` David Brownell
1 sibling, 0 replies; 4+ messages in thread
From: David Brownell @ 2008-10-31 17:26 UTC (permalink / raw)
To: Paulius Zaleckas
Cc: netdev, linux-arm-kernel, linux-embedded, Laurent Pinchart,
Grant Likely, Mike Frysinger
On Friday 31 October 2008, Paulius Zaleckas wrote:
> - if NO_IRQ is not defined define it to 0
Better yet, stop using that symbol entirely...
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2008-10-31 17:26 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2008-10-31 15:53 [PATCH] phylib: mdio-ofgpio ---> mdio-gpio Paulius Zaleckas
2008-10-31 16:06 ` Grant Likely
2008-10-31 16:49 ` Russell King - ARM Linux
2008-10-31 17:26 ` David Brownell
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