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path: root/drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c
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Diffstat (limited to 'drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c')
-rw-r--r--drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c266
1 files changed, 266 insertions, 0 deletions
diff --git a/drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c b/drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c
new file mode 100644
index 000000000000..7c19c8e2bf91
--- /dev/null
+++ b/drivers/net/ethernet/broadcom/bgmac-bcma-mdio.c
@@ -0,0 +1,266 @@
+/*
+ * 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");