diff options
Diffstat (limited to 'drivers/net/ucc_geth_mii.c')
| -rw-r--r-- | drivers/net/ucc_geth_mii.c | 285 |
1 files changed, 0 insertions, 285 deletions
diff --git a/drivers/net/ucc_geth_mii.c b/drivers/net/ucc_geth_mii.c deleted file mode 100644 index c001d261366..00000000000 --- a/drivers/net/ucc_geth_mii.c +++ /dev/null @@ -1,285 +0,0 @@ -/* - * drivers/net/ucc_geth_mii.c - * - * QE UCC Gigabit Ethernet Driver -- MII Management Bus Implementation - * Provides Bus interface for MII Management regs in the UCC register space - * - * Copyright (C) 2007 Freescale Semiconductor, Inc. - * - * Authors: Li Yang <leoli@freescale.com> - * Kim Phillips <kim.phillips@freescale.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - */ - -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/string.h> -#include <linux/errno.h> -#include <linux/unistd.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> -#include <linux/spinlock.h> -#include <linux/mm.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/crc32.h> -#include <linux/mii.h> -#include <linux/phy.h> -#include <linux/fsl_devices.h> -#include <linux/of_platform.h> - -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/uaccess.h> -#include <asm/ucc.h> - -#include "ucc_geth_mii.h" -#include "ucc_geth.h" - -#define DEBUG -#ifdef DEBUG -#define vdbg(format, arg...) printk(KERN_DEBUG , format "\n" , ## arg) -#else -#define vdbg(format, arg...) do {} while(0) -#endif - -#define MII_DRV_DESC "QE UCC Ethernet Controller MII Bus" -#define MII_DRV_NAME "fsl-uec_mdio" - -/* Write value to the PHY for this device to the register at regnum, */ -/* waiting until the write is done before it returns. All PHY */ -/* configuration has to be done through the master UEC MIIM regs */ -int uec_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 value) -{ - struct ucc_mii_mng __iomem *regs = (void __iomem *)bus->priv; - - /* Setting up the MII Mangement Address Register */ - out_be32(®s->miimadd, - (mii_id << MIIMADD_PHY_ADDRESS_SHIFT) | regnum); - - /* Setting up the MII Mangement Control Register with the value */ - out_be32(®s->miimcon, value); - - /* Wait till MII management write is complete */ - while ((in_be32(®s->miimind)) & MIIMIND_BUSY) - cpu_relax(); - - return 0; -} - -/* Reads from register regnum in the PHY for device dev, */ -/* returning the value. Clears miimcom first. All PHY */ -/* configuration has to be done through the TSEC1 MIIM regs */ -int uec_mdio_read(struct mii_bus *bus, int mii_id, int regnum) -{ - struct ucc_mii_mng __iomem *regs = (void __iomem *)bus->priv; - u16 value; - - /* Setting up the MII Mangement Address Register */ - out_be32(®s->miimadd, - (mii_id << MIIMADD_PHY_ADDRESS_SHIFT) | regnum); - - /* Clear miimcom, perform an MII management read cycle */ - out_be32(®s->miimcom, 0); - out_be32(®s->miimcom, MIIMCOM_READ_CYCLE); - - /* Wait till MII management write is complete */ - while ((in_be32(®s->miimind)) & (MIIMIND_BUSY | MIIMIND_NOT_VALID)) - cpu_relax(); - - /* Read MII management status */ - value = in_be32(®s->miimstat); - - return value; -} - -/* Reset the MIIM registers, and wait for the bus to free */ -static int uec_mdio_reset(struct mii_bus *bus) -{ - struct ucc_mii_mng __iomem *regs = (void __iomem *)bus->priv; - unsigned int timeout = PHY_INIT_TIMEOUT; - - mutex_lock(&bus->mdio_lock); - - /* Reset the management interface */ - out_be32(®s->miimcfg, MIIMCFG_RESET_MANAGEMENT); - - /* Setup the MII Mgmt clock speed */ - out_be32(®s->miimcfg, MIIMCFG_MANAGEMENT_CLOCK_DIVIDE_BY_112); - - /* Wait until the bus is free */ - while ((in_be32(®s->miimind) & MIIMIND_BUSY) && timeout--) - cpu_relax(); - - mutex_unlock(&bus->mdio_lock); - - if (timeout <= 0) { - printk(KERN_ERR "%s: The MII Bus is stuck!\n", bus->name); - return -EBUSY; - } - - return 0; -} - -static int uec_mdio_probe(struct of_device *ofdev, const struct of_device_id *match) -{ - struct device *device = &ofdev->dev; - struct device_node *np = ofdev->node, *tempnp = NULL; - struct device_node *child = NULL; - struct ucc_mii_mng __iomem *regs; - struct mii_bus *new_bus; - struct resource res; - int k, err = 0; - - new_bus = mdiobus_alloc(); - if (NULL == new_bus) - return -ENOMEM; - - new_bus->name = "UCC Ethernet Controller MII Bus"; - new_bus->read = &uec_mdio_read; - new_bus->write = &uec_mdio_write; - new_bus->reset = &uec_mdio_reset; - - memset(&res, 0, sizeof(res)); - - err = of_address_to_resource(np, 0, &res); - if (err) - goto reg_map_fail; - - snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", res.start); - - new_bus->irq = kmalloc(32 * sizeof(int), GFP_KERNEL); - - if (NULL == new_bus->irq) { - err = -ENOMEM; - goto reg_map_fail; - } - - for (k = 0; k < 32; k++) - new_bus->irq[k] = PHY_POLL; - - while ((child = of_get_next_child(np, child)) != NULL) { - int irq = irq_of_parse_and_map(child, 0); - if (irq != NO_IRQ) { - const u32 *id = of_get_property(child, "reg", NULL); - new_bus->irq[*id] = irq; - } - } - - /* Set the base address */ - regs = ioremap(res.start, sizeof(struct ucc_mii_mng)); - - if (NULL == regs) { - err = -ENOMEM; - goto ioremap_fail; - } - - new_bus->priv = (void __force *)regs; - - new_bus->parent = device; - dev_set_drvdata(device, new_bus); - - /* Read MII management master from device tree */ - while ((tempnp = of_find_compatible_node(tempnp, "network", "ucc_geth")) - != NULL) { - struct resource tempres; - - err = of_address_to_resource(tempnp, 0, &tempres); - if (err) - goto bus_register_fail; - - /* if our mdio regs fall within this UCC regs range */ - if ((res.start >= tempres.start) && - (res.end <= tempres.end)) { - /* set this UCC to be the MII master */ - const u32 *id; - - id = of_get_property(tempnp, "cell-index", NULL); - if (!id) { - id = of_get_property(tempnp, "device-id", NULL); - if (!id) - goto bus_register_fail; - } - - ucc_set_qe_mux_mii_mng(*id - 1); - - /* assign the TBI an address which won't - * conflict with the PHYs */ - out_be32(®s->utbipar, UTBIPAR_INIT_TBIPA); - break; - } - } - - err = mdiobus_register(new_bus); - if (0 != err) { - printk(KERN_ERR "%s: Cannot register as MDIO bus\n", - new_bus->name); - goto bus_register_fail; - } - - return 0; - -bus_register_fail: - iounmap(regs); -ioremap_fail: - kfree(new_bus->irq); -reg_map_fail: - mdiobus_free(new_bus); - - return err; -} - -static int uec_mdio_remove(struct of_device *ofdev) -{ - struct device *device = &ofdev->dev; - struct mii_bus *bus = dev_get_drvdata(device); - - mdiobus_unregister(bus); - - dev_set_drvdata(device, NULL); - - iounmap((void __iomem *)bus->priv); - bus->priv = NULL; - mdiobus_free(bus); - - return 0; -} - -static struct of_device_id uec_mdio_match[] = { - { - .type = "mdio", - .compatible = "ucc_geth_phy", - }, - { - .compatible = "fsl,ucc-mdio", - }, - {}, -}; - -static struct of_platform_driver uec_mdio_driver = { - .name = MII_DRV_NAME, - .probe = uec_mdio_probe, - .remove = uec_mdio_remove, - .match_table = uec_mdio_match, -}; - -int __init uec_mdio_init(void) -{ - return of_register_platform_driver(&uec_mdio_driver); -} - -/* called from __init ucc_geth_init, therefore can not be __exit */ -void uec_mdio_exit(void) -{ - of_unregister_platform_driver(&uec_mdio_driver); -} |