267 lines
7.3 KiB
C
267 lines
7.3 KiB
C
/*
|
|
* Driver for (BCM4706)? GBit MAC core on BCMA bus.
|
|
*
|
|
* Copyright (C) 2012 Rafał Miłecki <zajec5@gmail.com>
|
|
*
|
|
* Licensed under the GNU/GPL. See COPYING for details.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/bcma/bcma.h>
|
|
#include <linux/brcmphy.h>
|
|
#include "bgmac.h"
|
|
|
|
struct bcma_mdio {
|
|
struct bcma_device *core;
|
|
u8 phyaddr;
|
|
};
|
|
|
|
static bool bcma_mdio_wait_value(struct bcma_device *core, u16 reg, u32 mask,
|
|
u32 value, int timeout)
|
|
{
|
|
u32 val;
|
|
int i;
|
|
|
|
for (i = 0; i < timeout / 10; i++) {
|
|
val = bcma_read32(core, reg);
|
|
if ((val & mask) == value)
|
|
return true;
|
|
udelay(10);
|
|
}
|
|
dev_err(&core->dev, "Timeout waiting for reg 0x%X\n", reg);
|
|
return false;
|
|
}
|
|
|
|
/**************************************************
|
|
* PHY ops
|
|
**************************************************/
|
|
|
|
static u16 bcma_mdio_phy_read(struct bcma_mdio *bcma_mdio, u8 phyaddr, u8 reg)
|
|
{
|
|
struct bcma_device *core;
|
|
u16 phy_access_addr;
|
|
u16 phy_ctl_addr;
|
|
u32 tmp;
|
|
|
|
BUILD_BUG_ON(BGMAC_PA_DATA_MASK != BCMA_GMAC_CMN_PA_DATA_MASK);
|
|
BUILD_BUG_ON(BGMAC_PA_ADDR_MASK != BCMA_GMAC_CMN_PA_ADDR_MASK);
|
|
BUILD_BUG_ON(BGMAC_PA_ADDR_SHIFT != BCMA_GMAC_CMN_PA_ADDR_SHIFT);
|
|
BUILD_BUG_ON(BGMAC_PA_REG_MASK != BCMA_GMAC_CMN_PA_REG_MASK);
|
|
BUILD_BUG_ON(BGMAC_PA_REG_SHIFT != BCMA_GMAC_CMN_PA_REG_SHIFT);
|
|
BUILD_BUG_ON(BGMAC_PA_WRITE != BCMA_GMAC_CMN_PA_WRITE);
|
|
BUILD_BUG_ON(BGMAC_PA_START != BCMA_GMAC_CMN_PA_START);
|
|
BUILD_BUG_ON(BGMAC_PC_EPA_MASK != BCMA_GMAC_CMN_PC_EPA_MASK);
|
|
BUILD_BUG_ON(BGMAC_PC_MCT_MASK != BCMA_GMAC_CMN_PC_MCT_MASK);
|
|
BUILD_BUG_ON(BGMAC_PC_MCT_SHIFT != BCMA_GMAC_CMN_PC_MCT_SHIFT);
|
|
BUILD_BUG_ON(BGMAC_PC_MTE != BCMA_GMAC_CMN_PC_MTE);
|
|
|
|
if (bcma_mdio->core->id.id == BCMA_CORE_4706_MAC_GBIT) {
|
|
core = bcma_mdio->core->bus->drv_gmac_cmn.core;
|
|
phy_access_addr = BCMA_GMAC_CMN_PHY_ACCESS;
|
|
phy_ctl_addr = BCMA_GMAC_CMN_PHY_CTL;
|
|
} else {
|
|
core = bcma_mdio->core;
|
|
phy_access_addr = BGMAC_PHY_ACCESS;
|
|
phy_ctl_addr = BGMAC_PHY_CNTL;
|
|
}
|
|
|
|
tmp = bcma_read32(core, phy_ctl_addr);
|
|
tmp &= ~BGMAC_PC_EPA_MASK;
|
|
tmp |= phyaddr;
|
|
bcma_write32(core, phy_ctl_addr, tmp);
|
|
|
|
tmp = BGMAC_PA_START;
|
|
tmp |= phyaddr << BGMAC_PA_ADDR_SHIFT;
|
|
tmp |= reg << BGMAC_PA_REG_SHIFT;
|
|
bcma_write32(core, phy_access_addr, tmp);
|
|
|
|
if (!bcma_mdio_wait_value(core, phy_access_addr, BGMAC_PA_START, 0,
|
|
1000)) {
|
|
dev_err(&core->dev, "Reading PHY %d register 0x%X failed\n",
|
|
phyaddr, reg);
|
|
return 0xffff;
|
|
}
|
|
|
|
return bcma_read32(core, phy_access_addr) & BGMAC_PA_DATA_MASK;
|
|
}
|
|
|
|
/* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphywr */
|
|
static int bcma_mdio_phy_write(struct bcma_mdio *bcma_mdio, u8 phyaddr, u8 reg,
|
|
u16 value)
|
|
{
|
|
struct bcma_device *core;
|
|
u16 phy_access_addr;
|
|
u16 phy_ctl_addr;
|
|
u32 tmp;
|
|
|
|
if (bcma_mdio->core->id.id == BCMA_CORE_4706_MAC_GBIT) {
|
|
core = bcma_mdio->core->bus->drv_gmac_cmn.core;
|
|
phy_access_addr = BCMA_GMAC_CMN_PHY_ACCESS;
|
|
phy_ctl_addr = BCMA_GMAC_CMN_PHY_CTL;
|
|
} else {
|
|
core = bcma_mdio->core;
|
|
phy_access_addr = BGMAC_PHY_ACCESS;
|
|
phy_ctl_addr = BGMAC_PHY_CNTL;
|
|
}
|
|
|
|
tmp = bcma_read32(core, phy_ctl_addr);
|
|
tmp &= ~BGMAC_PC_EPA_MASK;
|
|
tmp |= phyaddr;
|
|
bcma_write32(core, phy_ctl_addr, tmp);
|
|
|
|
bcma_write32(bcma_mdio->core, BGMAC_INT_STATUS, BGMAC_IS_MDIO);
|
|
if (bcma_read32(bcma_mdio->core, BGMAC_INT_STATUS) & BGMAC_IS_MDIO)
|
|
dev_warn(&core->dev, "Error setting MDIO int\n");
|
|
|
|
tmp = BGMAC_PA_START;
|
|
tmp |= BGMAC_PA_WRITE;
|
|
tmp |= phyaddr << BGMAC_PA_ADDR_SHIFT;
|
|
tmp |= reg << BGMAC_PA_REG_SHIFT;
|
|
tmp |= value;
|
|
bcma_write32(core, phy_access_addr, tmp);
|
|
|
|
if (!bcma_mdio_wait_value(core, phy_access_addr, BGMAC_PA_START, 0,
|
|
1000)) {
|
|
dev_err(&core->dev, "Writing to PHY %d register 0x%X failed\n",
|
|
phyaddr, reg);
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyinit */
|
|
static void bcma_mdio_phy_init(struct bcma_mdio *bcma_mdio)
|
|
{
|
|
struct bcma_chipinfo *ci = &bcma_mdio->core->bus->chipinfo;
|
|
u8 i;
|
|
|
|
if (ci->id == BCMA_CHIP_ID_BCM5356) {
|
|
for (i = 0; i < 5; i++) {
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x1f, 0x008b);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x15, 0x0100);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x1f, 0x000f);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x12, 0x2aaa);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x1f, 0x000b);
|
|
}
|
|
}
|
|
if ((ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg != 10) ||
|
|
(ci->id == BCMA_CHIP_ID_BCM4749 && ci->pkg != 10) ||
|
|
(ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg != 9)) {
|
|
struct bcma_drv_cc *cc = &bcma_mdio->core->bus->drv_cc;
|
|
|
|
bcma_chipco_chipctl_maskset(cc, 2, ~0xc0000000, 0);
|
|
bcma_chipco_chipctl_maskset(cc, 4, ~0x80000000, 0);
|
|
for (i = 0; i < 5; i++) {
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x1f, 0x000f);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x16, 0x5284);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x1f, 0x000b);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x17, 0x0010);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x1f, 0x000f);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x16, 0x5296);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x17, 0x1073);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x17, 0x9073);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x16, 0x52b6);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x17, 0x9273);
|
|
bcma_mdio_phy_write(bcma_mdio, i, 0x1f, 0x000b);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipphyreset */
|
|
static int bcma_mdio_phy_reset(struct mii_bus *bus)
|
|
{
|
|
struct bcma_mdio *bcma_mdio = bus->priv;
|
|
u8 phyaddr = bcma_mdio->phyaddr;
|
|
|
|
if (bcma_mdio->phyaddr == BGMAC_PHY_NOREGS)
|
|
return 0;
|
|
|
|
bcma_mdio_phy_write(bcma_mdio, phyaddr, MII_BMCR, BMCR_RESET);
|
|
udelay(100);
|
|
if (bcma_mdio_phy_read(bcma_mdio, phyaddr, MII_BMCR) & BMCR_RESET)
|
|
dev_err(&bcma_mdio->core->dev, "PHY reset failed\n");
|
|
bcma_mdio_phy_init(bcma_mdio);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**************************************************
|
|
* MII
|
|
**************************************************/
|
|
|
|
static int bcma_mdio_mii_read(struct mii_bus *bus, int mii_id, int regnum)
|
|
{
|
|
return bcma_mdio_phy_read(bus->priv, mii_id, regnum);
|
|
}
|
|
|
|
static int bcma_mdio_mii_write(struct mii_bus *bus, int mii_id, int regnum,
|
|
u16 value)
|
|
{
|
|
return bcma_mdio_phy_write(bus->priv, mii_id, regnum, value);
|
|
}
|
|
|
|
struct mii_bus *bcma_mdio_mii_register(struct bcma_device *core, u8 phyaddr)
|
|
{
|
|
struct bcma_mdio *bcma_mdio;
|
|
struct mii_bus *mii_bus;
|
|
int err;
|
|
|
|
bcma_mdio = kzalloc(sizeof(*bcma_mdio), GFP_KERNEL);
|
|
if (!bcma_mdio)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
mii_bus = mdiobus_alloc();
|
|
if (!mii_bus) {
|
|
err = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
mii_bus->name = "bcma_mdio mii bus";
|
|
sprintf(mii_bus->id, "%s-%d-%d", "bcma_mdio", core->bus->num,
|
|
core->core_unit);
|
|
mii_bus->priv = bcma_mdio;
|
|
mii_bus->read = bcma_mdio_mii_read;
|
|
mii_bus->write = bcma_mdio_mii_write;
|
|
mii_bus->reset = bcma_mdio_phy_reset;
|
|
mii_bus->parent = &core->dev;
|
|
mii_bus->phy_mask = ~(1 << phyaddr);
|
|
|
|
bcma_mdio->core = core;
|
|
bcma_mdio->phyaddr = phyaddr;
|
|
|
|
err = mdiobus_register(mii_bus);
|
|
if (err) {
|
|
dev_err(&core->dev, "Registration of mii bus failed\n");
|
|
goto err_free_bus;
|
|
}
|
|
|
|
return mii_bus;
|
|
|
|
err_free_bus:
|
|
mdiobus_free(mii_bus);
|
|
err:
|
|
kfree(bcma_mdio);
|
|
return ERR_PTR(err);
|
|
}
|
|
EXPORT_SYMBOL_GPL(bcma_mdio_mii_register);
|
|
|
|
void bcma_mdio_mii_unregister(struct mii_bus *mii_bus)
|
|
{
|
|
struct bcma_mdio *bcma_mdio;
|
|
|
|
if (!mii_bus)
|
|
return;
|
|
|
|
bcma_mdio = mii_bus->priv;
|
|
|
|
mdiobus_unregister(mii_bus);
|
|
mdiobus_free(mii_bus);
|
|
kfree(bcma_mdio);
|
|
}
|
|
EXPORT_SYMBOL_GPL(bcma_mdio_mii_unregister);
|
|
|
|
MODULE_AUTHOR("Rafał Miłecki");
|
|
MODULE_LICENSE("GPL");
|