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authorDavid S. Miller <davem@davemloft.net>2010-01-22 22:45:46 -0800
committerDavid S. Miller <davem@davemloft.net>2010-01-22 22:45:46 -0800
commit6be325719b3e54624397e413efd4b33a997e55a3 (patch)
tree57f321a56794cab2222e179b16731e0d76a4a68a /drivers/net/phy
parent26d92f9276a56d55511a427fb70bd70886af647a (diff)
parent92dcffb916d309aa01778bf8963a6932e4014d07 (diff)
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Diffstat (limited to 'drivers/net/phy')
-rw-r--r--drivers/net/phy/Kconfig11
-rw-r--r--drivers/net/phy/Makefile1
-rw-r--r--drivers/net/phy/mdio-octeon.c180
3 files changed, 192 insertions, 0 deletions
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index d5d8e1c5bc9..fc5938ba3d7 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -115,4 +115,15 @@ config MDIO_GPIO
To compile this driver as a module, choose M here: the module
will be called mdio-gpio.
+config MDIO_OCTEON
+ tristate "Support for MDIO buses on Octeon SOCs"
+ depends on CPU_CAVIUM_OCTEON
+ default y
+ help
+
+ This module provides a driver for the Octeon MDIO busses.
+ It is required by the Octeon Ethernet device drivers.
+
+ If in doubt, say Y.
+
endif # PHYLIB
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index edfaac48cbd..1342585af38 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -20,3 +20,4 @@ obj-$(CONFIG_MDIO_BITBANG) += mdio-bitbang.o
obj-$(CONFIG_MDIO_GPIO) += mdio-gpio.o
obj-$(CONFIG_NATIONAL_PHY) += national.o
obj-$(CONFIG_STE10XP) += ste10Xp.o
+obj-$(CONFIG_MDIO_OCTEON) += mdio-octeon.o
diff --git a/drivers/net/phy/mdio-octeon.c b/drivers/net/phy/mdio-octeon.c
new file mode 100644
index 00000000000..61a4461cbda
--- /dev/null
+++ b/drivers/net/phy/mdio-octeon.c
@@ -0,0 +1,180 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2009 Cavium Networks
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/phy.h>
+
+#include <asm/octeon/octeon.h>
+#include <asm/octeon/cvmx-smix-defs.h>
+
+#define DRV_VERSION "1.0"
+#define DRV_DESCRIPTION "Cavium Networks Octeon SMI/MDIO driver"
+
+struct octeon_mdiobus {
+ struct mii_bus *mii_bus;
+ int unit;
+ int phy_irq[PHY_MAX_ADDR];
+};
+
+static int octeon_mdiobus_read(struct mii_bus *bus, int phy_id, int regnum)
+{
+ struct octeon_mdiobus *p = bus->priv;
+ union cvmx_smix_cmd smi_cmd;
+ union cvmx_smix_rd_dat smi_rd;
+ int timeout = 1000;
+
+ smi_cmd.u64 = 0;
+ smi_cmd.s.phy_op = 1; /* MDIO_CLAUSE_22_READ */
+ smi_cmd.s.phy_adr = phy_id;
+ smi_cmd.s.reg_adr = regnum;
+ cvmx_write_csr(CVMX_SMIX_CMD(p->unit), smi_cmd.u64);
+
+ do {
+ /*
+ * Wait 1000 clocks so we don't saturate the RSL bus
+ * doing reads.
+ */
+ cvmx_wait(1000);
+ smi_rd.u64 = cvmx_read_csr(CVMX_SMIX_RD_DAT(p->unit));
+ } while (smi_rd.s.pending && --timeout);
+
+ if (smi_rd.s.val)
+ return smi_rd.s.dat;
+ else
+ return -EIO;
+}
+
+static int octeon_mdiobus_write(struct mii_bus *bus, int phy_id,
+ int regnum, u16 val)
+{
+ struct octeon_mdiobus *p = bus->priv;
+ union cvmx_smix_cmd smi_cmd;
+ union cvmx_smix_wr_dat smi_wr;
+ int timeout = 1000;
+
+ smi_wr.u64 = 0;
+ smi_wr.s.dat = val;
+ cvmx_write_csr(CVMX_SMIX_WR_DAT(p->unit), smi_wr.u64);
+
+ smi_cmd.u64 = 0;
+ smi_cmd.s.phy_op = 0; /* MDIO_CLAUSE_22_WRITE */
+ smi_cmd.s.phy_adr = phy_id;
+ smi_cmd.s.reg_adr = regnum;
+ cvmx_write_csr(CVMX_SMIX_CMD(p->unit), smi_cmd.u64);
+
+ do {
+ /*
+ * Wait 1000 clocks so we don't saturate the RSL bus
+ * doing reads.
+ */
+ cvmx_wait(1000);
+ smi_wr.u64 = cvmx_read_csr(CVMX_SMIX_WR_DAT(p->unit));
+ } while (smi_wr.s.pending && --timeout);
+
+ if (timeout <= 0)
+ return -EIO;
+
+ return 0;
+}
+
+static int __init octeon_mdiobus_probe(struct platform_device *pdev)
+{
+ struct octeon_mdiobus *bus;
+ int i;
+ int err = -ENOENT;
+
+ bus = devm_kzalloc(&pdev->dev, sizeof(*bus), GFP_KERNEL);
+ if (!bus)
+ return -ENOMEM;
+
+ /* The platform_device id is our unit number. */
+ bus->unit = pdev->id;
+
+ bus->mii_bus = mdiobus_alloc();
+
+ if (!bus->mii_bus)
+ goto err;
+
+ /*
+ * Standard Octeon evaluation boards don't support phy
+ * interrupts, we need to poll.
+ */
+ for (i = 0; i < PHY_MAX_ADDR; i++)
+ bus->phy_irq[i] = PHY_POLL;
+
+ bus->mii_bus->priv = bus;
+ bus->mii_bus->irq = bus->phy_irq;
+ bus->mii_bus->name = "mdio-octeon";
+ snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%x", bus->unit);
+ bus->mii_bus->parent = &pdev->dev;
+
+ bus->mii_bus->read = octeon_mdiobus_read;
+ bus->mii_bus->write = octeon_mdiobus_write;
+
+ dev_set_drvdata(&pdev->dev, bus);
+
+ err = mdiobus_register(bus->mii_bus);
+ if (err)
+ goto err_register;
+
+ dev_info(&pdev->dev, "Version " DRV_VERSION "\n");
+
+ return 0;
+err_register:
+ mdiobus_free(bus->mii_bus);
+
+err:
+ devm_kfree(&pdev->dev, bus);
+ return err;
+}
+
+static int __exit octeon_mdiobus_remove(struct platform_device *pdev)
+{
+ struct octeon_mdiobus *bus;
+
+ bus = dev_get_drvdata(&pdev->dev);
+
+ mdiobus_unregister(bus->mii_bus);
+ mdiobus_free(bus->mii_bus);
+ return 0;
+}
+
+static struct platform_driver octeon_mdiobus_driver = {
+ .driver = {
+ .name = "mdio-octeon",
+ .owner = THIS_MODULE,
+ },
+ .probe = octeon_mdiobus_probe,
+ .remove = __exit_p(octeon_mdiobus_remove),
+};
+
+void octeon_mdiobus_force_mod_depencency(void)
+{
+ /* Let ethernet drivers force us to be loaded. */
+}
+EXPORT_SYMBOL(octeon_mdiobus_force_mod_depencency);
+
+static int __init octeon_mdiobus_mod_init(void)
+{
+ return platform_driver_register(&octeon_mdiobus_driver);
+}
+
+static void __exit octeon_mdiobus_mod_exit(void)
+{
+ platform_driver_unregister(&octeon_mdiobus_driver);
+}
+
+module_init(octeon_mdiobus_mod_init);
+module_exit(octeon_mdiobus_mod_exit);
+
+MODULE_DESCRIPTION(DRV_DESCRIPTION);
+MODULE_VERSION(DRV_VERSION);
+MODULE_AUTHOR("David Daney");
+MODULE_LICENSE("GPL");