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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/powerpc/platforms/pasemi/gpio_mdio.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/platforms/pasemi/gpio_mdio.c')
-rw-r--r--ANDROID_3.4.5/arch/powerpc/platforms/pasemi/gpio_mdio.c342
1 files changed, 0 insertions, 342 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/platforms/pasemi/gpio_mdio.c b/ANDROID_3.4.5/arch/powerpc/platforms/pasemi/gpio_mdio.c
deleted file mode 100644
index 9886296e..00000000
--- a/ANDROID_3.4.5/arch/powerpc/platforms/pasemi/gpio_mdio.c
+++ /dev/null
@@ -1,342 +0,0 @@
-/*
- * Copyright (C) 2006-2007 PA Semi, Inc
- *
- * Author: Olof Johansson, PA Semi
- *
- * Maintained by: Olof Johansson <olof@lixom.net>
- *
- * Based on drivers/net/fs_enet/mii-bitbang.c.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/interrupt.h>
-#include <linux/phy.h>
-#include <linux/of_mdio.h>
-#include <linux/of_platform.h>
-
-#define DELAY 1
-
-static void __iomem *gpio_regs;
-
-struct gpio_priv {
- int mdc_pin;
- int mdio_pin;
- int mdio_irqs[PHY_MAX_ADDR];
-};
-
-#define MDC_PIN(bus) (((struct gpio_priv *)bus->priv)->mdc_pin)
-#define MDIO_PIN(bus) (((struct gpio_priv *)bus->priv)->mdio_pin)
-
-static inline void mdio_lo(struct mii_bus *bus)
-{
- out_le32(gpio_regs+0x10, 1 << MDIO_PIN(bus));
-}
-
-static inline void mdio_hi(struct mii_bus *bus)
-{
- out_le32(gpio_regs, 1 << MDIO_PIN(bus));
-}
-
-static inline void mdc_lo(struct mii_bus *bus)
-{
- out_le32(gpio_regs+0x10, 1 << MDC_PIN(bus));
-}
-
-static inline void mdc_hi(struct mii_bus *bus)
-{
- out_le32(gpio_regs, 1 << MDC_PIN(bus));
-}
-
-static inline void mdio_active(struct mii_bus *bus)
-{
- out_le32(gpio_regs+0x20, (1 << MDC_PIN(bus)) | (1 << MDIO_PIN(bus)));
-}
-
-static inline void mdio_tristate(struct mii_bus *bus)
-{
- out_le32(gpio_regs+0x30, (1 << MDIO_PIN(bus)));
-}
-
-static inline int mdio_read(struct mii_bus *bus)
-{
- return !!(in_le32(gpio_regs+0x40) & (1 << MDIO_PIN(bus)));
-}
-
-static void clock_out(struct mii_bus *bus, int bit)
-{
- if (bit)
- mdio_hi(bus);
- else
- mdio_lo(bus);
- udelay(DELAY);
- mdc_hi(bus);
- udelay(DELAY);
- mdc_lo(bus);
-}
-
-/* Utility to send the preamble, address, and register (common to read and write). */
-static void bitbang_pre(struct mii_bus *bus, int read, u8 addr, u8 reg)
-{
- int i;
-
- /* CFE uses a really long preamble (40 bits). We'll do the same. */
- mdio_active(bus);
- for (i = 0; i < 40; i++) {
- clock_out(bus, 1);
- }
-
- /* send the start bit (01) and the read opcode (10) or write (10) */
- clock_out(bus, 0);
- clock_out(bus, 1);
-
- clock_out(bus, read);
- clock_out(bus, !read);
-
- /* send the PHY address */
- for (i = 0; i < 5; i++) {
- clock_out(bus, (addr & 0x10) != 0);
- addr <<= 1;
- }
-
- /* send the register address */
- for (i = 0; i < 5; i++) {
- clock_out(bus, (reg & 0x10) != 0);
- reg <<= 1;
- }
-}
-
-static int gpio_mdio_read(struct mii_bus *bus, int phy_id, int location)
-{
- u16 rdreg;
- int ret, i;
- u8 addr = phy_id & 0xff;
- u8 reg = location & 0xff;
-
- bitbang_pre(bus, 1, addr, reg);
-
- /* tri-state our MDIO I/O pin so we can read */
- mdio_tristate(bus);
- udelay(DELAY);
- mdc_hi(bus);
- udelay(DELAY);
- mdc_lo(bus);
-
- /* read 16 bits of register data, MSB first */
- rdreg = 0;
- for (i = 0; i < 16; i++) {
- mdc_lo(bus);
- udelay(DELAY);
- mdc_hi(bus);
- udelay(DELAY);
- mdc_lo(bus);
- udelay(DELAY);
- rdreg <<= 1;
- rdreg |= mdio_read(bus);
- }
-
- mdc_hi(bus);
- udelay(DELAY);
- mdc_lo(bus);
- udelay(DELAY);
-
- ret = rdreg;
-
- return ret;
-}
-
-static int gpio_mdio_write(struct mii_bus *bus, int phy_id, int location, u16 val)
-{
- int i;
-
- u8 addr = phy_id & 0xff;
- u8 reg = location & 0xff;
- u16 value = val & 0xffff;
-
- bitbang_pre(bus, 0, addr, reg);
-
- /* send the turnaround (10) */
- mdc_lo(bus);
- mdio_hi(bus);
- udelay(DELAY);
- mdc_hi(bus);
- udelay(DELAY);
- mdc_lo(bus);
- mdio_lo(bus);
- udelay(DELAY);
- mdc_hi(bus);
- udelay(DELAY);
-
- /* write 16 bits of register data, MSB first */
- for (i = 0; i < 16; i++) {
- mdc_lo(bus);
- if (value & 0x8000)
- mdio_hi(bus);
- else
- mdio_lo(bus);
- udelay(DELAY);
- mdc_hi(bus);
- udelay(DELAY);
- value <<= 1;
- }
-
- /*
- * Tri-state the MDIO line.
- */
- mdio_tristate(bus);
- mdc_lo(bus);
- udelay(DELAY);
- mdc_hi(bus);
- udelay(DELAY);
- return 0;
-}
-
-static int gpio_mdio_reset(struct mii_bus *bus)
-{
- /*nothing here - dunno how to reset it*/
- return 0;
-}
-
-
-static int __devinit gpio_mdio_probe(struct platform_device *ofdev)
-{
- struct device *dev = &ofdev->dev;
- struct device_node *np = ofdev->dev.of_node;
- struct mii_bus *new_bus;
- struct gpio_priv *priv;
- const unsigned int *prop;
- int err;
-
- err = -ENOMEM;
- priv = kzalloc(sizeof(struct gpio_priv), GFP_KERNEL);
- if (!priv)
- goto out;
-
- new_bus = mdiobus_alloc();
-
- if (!new_bus)
- goto out_free_priv;
-
- new_bus->name = "pasemi gpio mdio bus";
- new_bus->read = &gpio_mdio_read;
- new_bus->write = &gpio_mdio_write;
- new_bus->reset = &gpio_mdio_reset;
-
- prop = of_get_property(np, "reg", NULL);
- snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", *prop);
- new_bus->priv = priv;
-
- new_bus->irq = priv->mdio_irqs;
-
- prop = of_get_property(np, "mdc-pin", NULL);
- priv->mdc_pin = *prop;
-
- prop = of_get_property(np, "mdio-pin", NULL);
- priv->mdio_pin = *prop;
-
- new_bus->parent = dev;
- dev_set_drvdata(dev, new_bus);
-
- err = of_mdiobus_register(new_bus, np);
-
- if (err != 0) {
- printk(KERN_ERR "%s: Cannot register as MDIO bus, err %d\n",
- new_bus->name, err);
- goto out_free_irq;
- }
-
- return 0;
-
-out_free_irq:
- kfree(new_bus);
-out_free_priv:
- kfree(priv);
-out:
- return err;
-}
-
-
-static int gpio_mdio_remove(struct platform_device *dev)
-{
- struct mii_bus *bus = dev_get_drvdata(&dev->dev);
-
- mdiobus_unregister(bus);
-
- dev_set_drvdata(&dev->dev, NULL);
-
- kfree(bus->priv);
- bus->priv = NULL;
- mdiobus_free(bus);
-
- return 0;
-}
-
-static struct of_device_id gpio_mdio_match[] =
-{
- {
- .compatible = "gpio-mdio",
- },
- {},
-};
-MODULE_DEVICE_TABLE(of, gpio_mdio_match);
-
-static struct platform_driver gpio_mdio_driver =
-{
- .probe = gpio_mdio_probe,
- .remove = gpio_mdio_remove,
- .driver = {
- .name = "gpio-mdio-bitbang",
- .owner = THIS_MODULE,
- .of_match_table = gpio_mdio_match,
- },
-};
-
-int gpio_mdio_init(void)
-{
- struct device_node *np;
-
- np = of_find_compatible_node(NULL, NULL, "1682m-gpio");
- if (!np)
- np = of_find_compatible_node(NULL, NULL,
- "pasemi,pwrficient-gpio");
- if (!np)
- return -ENODEV;
- gpio_regs = of_iomap(np, 0);
- of_node_put(np);
-
- if (!gpio_regs)
- return -ENODEV;
-
- return platform_driver_register(&gpio_mdio_driver);
-}
-module_init(gpio_mdio_init);
-
-void gpio_mdio_exit(void)
-{
- platform_driver_unregister(&gpio_mdio_driver);
- if (gpio_regs)
- iounmap(gpio_regs);
-}
-module_exit(gpio_mdio_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Olof Johansson <olof@lixom.net>");
-MODULE_DESCRIPTION("Driver for MDIO over GPIO on PA Semi PWRficient-based boards");