staging: octeon: delete driver

This driver has been in the tree since 2009 with no real movement to get
it out.  Now it is starting to cause build issues and other problems for
people who want to fix coding style problems, but can not actually build
it.

As nothing is happening here, just delete the module entirely.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Cc: David Daney <ddaney@caviumnetworks.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: YueHaibing <yuehaibing@huawei.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Wambui Karuga <wambui.karugax@gmail.com>
Cc: Julia Lawall <julia.lawall@lip6.fr>
Cc: Florian Westphal <fw@strlen.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Branden Bonaby <brandonbonaby94@gmail.com>
Cc: "Petr Štetiar" <ynezz@true.cz>
Cc: Sandro Volery <sandro@volery.com>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Giovanni Gherdovich <bobdc9664@seznam.cz>
Cc: Valery Ivanov <ivalery111@gmail.com>
Link: https://lore.kernel.org/r/20191210091509.3546251-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 158 deletions

diff --git a/drivers/staging/octeon/ethernet-rgmii.c b/drivers/staging/octeon/ethernet-rgmii.c
deleted file mode 100644
index 0c4fac31540a..000000000000
--- a/drivers/staging/octeon/ethernet-rgmii.c
+++ /dev/null
@@ -1,158 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * This file is based on code from OCTEON SDK by Cavium Networks.
- *
- * Copyright (c) 2003-2007 Cavium Networks
- */
-
-#include <linux/kernel.h>
-#include <linux/netdevice.h>
-#include <linux/interrupt.h>
-#include <linux/phy.h>
-#include <linux/ratelimit.h>
-#include <net/dst.h>
-
-#include "octeon-ethernet.h"
-#include "ethernet-defines.h"
-#include "ethernet-util.h"
-#include "ethernet-mdio.h"
-
-static DEFINE_SPINLOCK(global_register_lock);
-
-static void cvm_oct_set_hw_preamble(struct octeon_ethernet *priv, bool enable)
-{
-	union cvmx_gmxx_rxx_frm_ctl gmxx_rxx_frm_ctl;
-	union cvmx_ipd_sub_port_fcs ipd_sub_port_fcs;
-	union cvmx_gmxx_rxx_int_reg gmxx_rxx_int_reg;
-	int interface = INTERFACE(priv->port);
-	int index = INDEX(priv->port);
-
-	/* Set preamble checking. */
-	gmxx_rxx_frm_ctl.u64 = cvmx_read_csr(CVMX_GMXX_RXX_FRM_CTL(index,
-								   interface));
-	gmxx_rxx_frm_ctl.s.pre_chk = enable;
-	cvmx_write_csr(CVMX_GMXX_RXX_FRM_CTL(index, interface),
-		       gmxx_rxx_frm_ctl.u64);
-
-	/* Set FCS stripping. */
-	ipd_sub_port_fcs.u64 = cvmx_read_csr(CVMX_IPD_SUB_PORT_FCS);
-	if (enable)
-		ipd_sub_port_fcs.s.port_bit |= 1ull << priv->port;
-	else
-		ipd_sub_port_fcs.s.port_bit &=
-					0xffffffffull ^ (1ull << priv->port);
-	cvmx_write_csr(CVMX_IPD_SUB_PORT_FCS, ipd_sub_port_fcs.u64);
-
-	/* Clear any error bits. */
-	gmxx_rxx_int_reg.u64 = cvmx_read_csr(CVMX_GMXX_RXX_INT_REG(index,
-								   interface));
-	cvmx_write_csr(CVMX_GMXX_RXX_INT_REG(index, interface),
-		       gmxx_rxx_int_reg.u64);
-}
-
-static void cvm_oct_check_preamble_errors(struct net_device *dev)
-{
-	struct octeon_ethernet *priv = netdev_priv(dev);
-	union cvmx_helper_link_info link_info;
-	unsigned long flags;
-
-	link_info.u64 = priv->link_info;
-
-	/*
-	 * Take the global register lock since we are going to
-	 * touch registers that affect more than one port.
-	 */
-	spin_lock_irqsave(&global_register_lock, flags);
-
-	if (link_info.s.speed == 10 && priv->last_speed == 10) {
-		/*
-		 * Read the GMXX_RXX_INT_REG[PCTERR] bit and see if we are
-		 * getting preamble errors.
-		 */
-		int interface = INTERFACE(priv->port);
-		int index = INDEX(priv->port);
-		union cvmx_gmxx_rxx_int_reg gmxx_rxx_int_reg;
-
-		gmxx_rxx_int_reg.u64 = cvmx_read_csr(CVMX_GMXX_RXX_INT_REG
-							(index, interface));
-		if (gmxx_rxx_int_reg.s.pcterr) {
-			/*
-			 * We are getting preamble errors at 10Mbps. Most
-			 * likely the PHY is giving us packets with misaligned
-			 * preambles. In order to get these packets we need to
-			 * disable preamble checking and do it in software.
-			 */
-			cvm_oct_set_hw_preamble(priv, false);
-			printk_ratelimited("%s: Using 10Mbps with software preamble removal\n",
-					   dev->name);
-		}
-	} else {
-		/*
-		 * Since the 10Mbps preamble workaround is allowed we need to
-		 * enable preamble checking, FCS stripping, and clear error
-		 * bits on every speed change. If errors occur during 10Mbps
-		 * operation the above code will change this stuff
-		 */
-		if (priv->last_speed != link_info.s.speed)
-			cvm_oct_set_hw_preamble(priv, true);
-		priv->last_speed = link_info.s.speed;
-	}
-	spin_unlock_irqrestore(&global_register_lock, flags);
-}
-
-static void cvm_oct_rgmii_poll(struct net_device *dev)
-{
-	struct octeon_ethernet *priv = netdev_priv(dev);
-	union cvmx_helper_link_info link_info;
-	bool status_change;
-
-	link_info = cvmx_helper_link_get(priv->port);
-	if (priv->link_info != link_info.u64 &&
-	    cvmx_helper_link_set(priv->port, link_info))
-		link_info.u64 = priv->link_info;
-	status_change = priv->link_info != link_info.u64;
-	priv->link_info = link_info.u64;
-
-	cvm_oct_check_preamble_errors(dev);
-
-	if (likely(!status_change))
-		return;
-
-	/* Tell core. */
-	if (link_info.s.link_up) {
-		if (!netif_carrier_ok(dev))
-			netif_carrier_on(dev);
-	} else if (netif_carrier_ok(dev)) {
-		netif_carrier_off(dev);
-	}
-	cvm_oct_note_carrier(priv, link_info);
-}
-
-int cvm_oct_rgmii_open(struct net_device *dev)
-{
-	struct octeon_ethernet *priv = netdev_priv(dev);
-	int ret;
-
-	ret = cvm_oct_common_open(dev, cvm_oct_rgmii_poll);
-	if (ret)
-		return ret;
-
-	if (dev->phydev) {
-		/*
-		 * In phydev mode, we need still periodic polling for the
-		 * preamble error checking, and we also need to call this
-		 * function on every link state change.
-		 *
-		 * Only true RGMII ports need to be polled. In GMII mode, port
-		 * 0 is really a RGMII port.
-		 */
-		if ((priv->imode == CVMX_HELPER_INTERFACE_MODE_GMII &&
-		     priv->port  == 0) ||
-		    (priv->imode == CVMX_HELPER_INTERFACE_MODE_RGMII)) {
-			priv->poll = cvm_oct_check_preamble_errors;
-			cvm_oct_check_preamble_errors(dev);
-		}
-	}
-
-	return 0;
-}