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path: root/drivers/net/phy/mdio-octeon.c
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Diffstat (limited to 'drivers/net/phy/mdio-octeon.c')
-rw-r--r--drivers/net/phy/mdio-octeon.c285
1 files changed, 0 insertions, 285 deletions
diff --git a/drivers/net/phy/mdio-octeon.c b/drivers/net/phy/mdio-octeon.c
deleted file mode 100644
index b51fa1f469b0..000000000000
--- a/drivers/net/phy/mdio-octeon.c
+++ /dev/null
@@ -1,285 +0,0 @@
-/*
- * 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) 2009-2012 Cavium, Inc.
- */
-
-#include <linux/platform_device.h>
-#include <linux/of_mdio.h>
-#include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/gfp.h>
-#include <linux/phy.h>
-#include <linux/io.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"
-
-#define SMI_CMD 0x0
-#define SMI_WR_DAT 0x8
-#define SMI_RD_DAT 0x10
-#define SMI_CLK 0x18
-#define SMI_EN 0x20
-
-enum octeon_mdiobus_mode {
- UNINIT = 0,
- C22,
- C45
-};
-
-struct octeon_mdiobus {
- struct mii_bus *mii_bus;
- u64 register_base;
- resource_size_t mdio_phys;
- resource_size_t regsize;
- enum octeon_mdiobus_mode mode;
- int phy_irq[PHY_MAX_ADDR];
-};
-
-static void octeon_mdiobus_set_mode(struct octeon_mdiobus *p,
- enum octeon_mdiobus_mode m)
-{
- union cvmx_smix_clk smi_clk;
-
- if (m == p->mode)
- return;
-
- smi_clk.u64 = cvmx_read_csr(p->register_base + SMI_CLK);
- smi_clk.s.mode = (m == C45) ? 1 : 0;
- smi_clk.s.preamble = 1;
- cvmx_write_csr(p->register_base + SMI_CLK, smi_clk.u64);
- p->mode = m;
-}
-
-static int octeon_mdiobus_c45_addr(struct octeon_mdiobus *p,
- int phy_id, int regnum)
-{
- union cvmx_smix_cmd smi_cmd;
- union cvmx_smix_wr_dat smi_wr;
- int timeout = 1000;
-
- octeon_mdiobus_set_mode(p, C45);
-
- smi_wr.u64 = 0;
- smi_wr.s.dat = regnum & 0xffff;
- cvmx_write_csr(p->register_base + SMI_WR_DAT, smi_wr.u64);
-
- regnum = (regnum >> 16) & 0x1f;
-
- smi_cmd.u64 = 0;
- smi_cmd.s.phy_op = 0; /* MDIO_CLAUSE_45_ADDRESS */
- smi_cmd.s.phy_adr = phy_id;
- smi_cmd.s.reg_adr = regnum;
- cvmx_write_csr(p->register_base + SMI_CMD, smi_cmd.u64);
-
- do {
- /* Wait 1000 clocks so we don't saturate the RSL bus
- * doing reads.
- */
- __delay(1000);
- smi_wr.u64 = cvmx_read_csr(p->register_base + SMI_WR_DAT);
- } while (smi_wr.s.pending && --timeout);
-
- if (timeout <= 0)
- return -EIO;
- return 0;
-}
-
-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;
- unsigned int op = 1; /* MDIO_CLAUSE_22_READ */
- int timeout = 1000;
-
- if (regnum & MII_ADDR_C45) {
- int r = octeon_mdiobus_c45_addr(p, phy_id, regnum);
- if (r < 0)
- return r;
-
- regnum = (regnum >> 16) & 0x1f;
- op = 3; /* MDIO_CLAUSE_45_READ */
- } else {
- octeon_mdiobus_set_mode(p, C22);
- }
-
-
- smi_cmd.u64 = 0;
- smi_cmd.s.phy_op = op;
- smi_cmd.s.phy_adr = phy_id;
- smi_cmd.s.reg_adr = regnum;
- cvmx_write_csr(p->register_base + SMI_CMD, smi_cmd.u64);
-
- do {
- /* Wait 1000 clocks so we don't saturate the RSL bus
- * doing reads.
- */
- __delay(1000);
- smi_rd.u64 = cvmx_read_csr(p->register_base + SMI_RD_DAT);
- } 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;
- unsigned int op = 0; /* MDIO_CLAUSE_22_WRITE */
- int timeout = 1000;
-
-
- if (regnum & MII_ADDR_C45) {
- int r = octeon_mdiobus_c45_addr(p, phy_id, regnum);
- if (r < 0)
- return r;
-
- regnum = (regnum >> 16) & 0x1f;
- op = 1; /* MDIO_CLAUSE_45_WRITE */
- } else {
- octeon_mdiobus_set_mode(p, C22);
- }
-
- smi_wr.u64 = 0;
- smi_wr.s.dat = val;
- cvmx_write_csr(p->register_base + SMI_WR_DAT, smi_wr.u64);
-
- smi_cmd.u64 = 0;
- smi_cmd.s.phy_op = op;
- smi_cmd.s.phy_adr = phy_id;
- smi_cmd.s.reg_adr = regnum;
- cvmx_write_csr(p->register_base + SMI_CMD, smi_cmd.u64);
-
- do {
- /* Wait 1000 clocks so we don't saturate the RSL bus
- * doing reads.
- */
- __delay(1000);
- smi_wr.u64 = cvmx_read_csr(p->register_base + SMI_WR_DAT);
- } while (smi_wr.s.pending && --timeout);
-
- if (timeout <= 0)
- return -EIO;
-
- return 0;
-}
-
-static int octeon_mdiobus_probe(struct platform_device *pdev)
-{
- struct octeon_mdiobus *bus;
- struct resource *res_mem;
- union cvmx_smix_en smi_en;
- int err = -ENOENT;
-
- bus = devm_kzalloc(&pdev->dev, sizeof(*bus), GFP_KERNEL);
- if (!bus)
- return -ENOMEM;
-
- res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
- if (res_mem == NULL) {
- dev_err(&pdev->dev, "found no memory resource\n");
- err = -ENXIO;
- goto fail;
- }
- bus->mdio_phys = res_mem->start;
- bus->regsize = resource_size(res_mem);
- if (!devm_request_mem_region(&pdev->dev, bus->mdio_phys, bus->regsize,
- res_mem->name)) {
- dev_err(&pdev->dev, "request_mem_region failed\n");
- goto fail;
- }
- bus->register_base =
- (u64)devm_ioremap(&pdev->dev, bus->mdio_phys, bus->regsize);
-
- bus->mii_bus = mdiobus_alloc();
-
- if (!bus->mii_bus)
- goto fail;
-
- smi_en.u64 = 0;
- smi_en.s.en = 1;
- cvmx_write_csr(bus->register_base + SMI_EN, smi_en.u64);
-
- 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, "%llx", bus->register_base);
- 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 = of_mdiobus_register(bus->mii_bus, pdev->dev.of_node);
- if (err)
- goto fail_register;
-
- dev_info(&pdev->dev, "Version " DRV_VERSION "\n");
-
- return 0;
-fail_register:
- mdiobus_free(bus->mii_bus);
-fail:
- smi_en.u64 = 0;
- cvmx_write_csr(bus->register_base + SMI_EN, smi_en.u64);
- return err;
-}
-
-static int octeon_mdiobus_remove(struct platform_device *pdev)
-{
- struct octeon_mdiobus *bus;
- union cvmx_smix_en smi_en;
-
- bus = dev_get_drvdata(&pdev->dev);
-
- mdiobus_unregister(bus->mii_bus);
- mdiobus_free(bus->mii_bus);
- smi_en.u64 = 0;
- cvmx_write_csr(bus->register_base + SMI_EN, smi_en.u64);
- return 0;
-}
-
-static struct of_device_id octeon_mdiobus_match[] = {
- {
- .compatible = "cavium,octeon-3860-mdio",
- },
- {},
-};
-MODULE_DEVICE_TABLE(of, octeon_mdiobus_match);
-
-static struct platform_driver octeon_mdiobus_driver = {
- .driver = {
- .name = "mdio-octeon",
- .owner = THIS_MODULE,
- .of_match_table = octeon_mdiobus_match,
- },
- .probe = octeon_mdiobus_probe,
- .remove = 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);
-
-module_platform_driver(octeon_mdiobus_driver);
-
-MODULE_DESCRIPTION(DRV_DESCRIPTION);
-MODULE_VERSION(DRV_VERSION);
-MODULE_AUTHOR("David Daney");
-MODULE_LICENSE("GPL");
generated by cgit (git 2.34.1) at 2025-12-25 03:36:13 +0000