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Diffstat (limited to 'drivers/staging/octeon/ethernet-spi.c')
-rw-r--r--drivers/staging/octeon/ethernet-spi.c226
1 files changed, 0 insertions, 226 deletions
diff --git a/drivers/staging/octeon/ethernet-spi.c b/drivers/staging/octeon/ethernet-spi.c
deleted file mode 100644
index c582403e6a1f..000000000000
--- a/drivers/staging/octeon/ethernet-spi.c
+++ /dev/null
@@ -1,226 +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 <net/dst.h>
-
-#include "octeon-ethernet.h"
-#include "ethernet-defines.h"
-#include "ethernet-util.h"
-
-static int number_spi_ports;
-static int need_retrain[2] = { 0, 0 };
-
-static void cvm_oct_spxx_int_pr(union cvmx_spxx_int_reg spx_int_reg, int index)
-{
- if (spx_int_reg.s.spf)
- pr_err("SPI%d: SRX Spi4 interface down\n", index);
- if (spx_int_reg.s.calerr)
- pr_err("SPI%d: SRX Spi4 Calendar table parity error\n", index);
- if (spx_int_reg.s.syncerr)
- pr_err("SPI%d: SRX Consecutive Spi4 DIP4 errors have exceeded SPX_ERR_CTL[ERRCNT]\n",
- index);
- if (spx_int_reg.s.diperr)
- pr_err("SPI%d: SRX Spi4 DIP4 error\n", index);
- if (spx_int_reg.s.tpaovr)
- pr_err("SPI%d: SRX Selected port has hit TPA overflow\n",
- index);
- if (spx_int_reg.s.rsverr)
- pr_err("SPI%d: SRX Spi4 reserved control word detected\n",
- index);
- if (spx_int_reg.s.drwnng)
- pr_err("SPI%d: SRX Spi4 receive FIFO drowning/overflow\n",
- index);
- if (spx_int_reg.s.clserr)
- pr_err("SPI%d: SRX Spi4 packet closed on non-16B alignment without EOP\n",
- index);
- if (spx_int_reg.s.spiovr)
- pr_err("SPI%d: SRX Spi4 async FIFO overflow\n", index);
- if (spx_int_reg.s.abnorm)
- pr_err("SPI%d: SRX Abnormal packet termination (ERR bit)\n",
- index);
- if (spx_int_reg.s.prtnxa)
- pr_err("SPI%d: SRX Port out of range\n", index);
-}
-
-static void cvm_oct_stxx_int_pr(union cvmx_stxx_int_reg stx_int_reg, int index)
-{
- if (stx_int_reg.s.syncerr)
- pr_err("SPI%d: STX Interface encountered a fatal error\n",
- index);
- if (stx_int_reg.s.frmerr)
- pr_err("SPI%d: STX FRMCNT has exceeded STX_DIP_CNT[MAXFRM]\n",
- index);
- if (stx_int_reg.s.unxfrm)
- pr_err("SPI%d: STX Unexpected framing sequence\n", index);
- if (stx_int_reg.s.nosync)
- pr_err("SPI%d: STX ERRCNT has exceeded STX_DIP_CNT[MAXDIP]\n",
- index);
- if (stx_int_reg.s.diperr)
- pr_err("SPI%d: STX DIP2 error on the Spi4 Status channel\n",
- index);
- if (stx_int_reg.s.datovr)
- pr_err("SPI%d: STX Spi4 FIFO overflow error\n", index);
- if (stx_int_reg.s.ovrbst)
- pr_err("SPI%d: STX Transmit packet burst too big\n", index);
- if (stx_int_reg.s.calpar1)
- pr_err("SPI%d: STX Calendar Table Parity Error Bank%d\n",
- index, 1);
- if (stx_int_reg.s.calpar0)
- pr_err("SPI%d: STX Calendar Table Parity Error Bank%d\n",
- index, 0);
-}
-
-static irqreturn_t cvm_oct_spi_spx_int(int index)
-{
- union cvmx_spxx_int_reg spx_int_reg;
- union cvmx_stxx_int_reg stx_int_reg;
-
- spx_int_reg.u64 = cvmx_read_csr(CVMX_SPXX_INT_REG(index));
- cvmx_write_csr(CVMX_SPXX_INT_REG(index), spx_int_reg.u64);
- if (!need_retrain[index]) {
- spx_int_reg.u64 &= cvmx_read_csr(CVMX_SPXX_INT_MSK(index));
- cvm_oct_spxx_int_pr(spx_int_reg, index);
- }
-
- stx_int_reg.u64 = cvmx_read_csr(CVMX_STXX_INT_REG(index));
- cvmx_write_csr(CVMX_STXX_INT_REG(index), stx_int_reg.u64);
- if (!need_retrain[index]) {
- stx_int_reg.u64 &= cvmx_read_csr(CVMX_STXX_INT_MSK(index));
- cvm_oct_stxx_int_pr(stx_int_reg, index);
- }
-
- cvmx_write_csr(CVMX_SPXX_INT_MSK(index), 0);
- cvmx_write_csr(CVMX_STXX_INT_MSK(index), 0);
- need_retrain[index] = 1;
-
- return IRQ_HANDLED;
-}
-
-static irqreturn_t cvm_oct_spi_rml_interrupt(int cpl, void *dev_id)
-{
- irqreturn_t return_status = IRQ_NONE;
- union cvmx_npi_rsl_int_blocks rsl_int_blocks;
-
- /* Check and see if this interrupt was caused by the GMX block */
- rsl_int_blocks.u64 = cvmx_read_csr(CVMX_NPI_RSL_INT_BLOCKS);
- if (rsl_int_blocks.s.spx1) /* 19 - SPX1_INT_REG & STX1_INT_REG */
- return_status = cvm_oct_spi_spx_int(1);
-
- if (rsl_int_blocks.s.spx0) /* 18 - SPX0_INT_REG & STX0_INT_REG */
- return_status = cvm_oct_spi_spx_int(0);
-
- return return_status;
-}
-
-static void cvm_oct_spi_enable_error_reporting(int interface)
-{
- union cvmx_spxx_int_msk spxx_int_msk;
- union cvmx_stxx_int_msk stxx_int_msk;
-
- spxx_int_msk.u64 = cvmx_read_csr(CVMX_SPXX_INT_MSK(interface));
- spxx_int_msk.s.calerr = 1;
- spxx_int_msk.s.syncerr = 1;
- spxx_int_msk.s.diperr = 1;
- spxx_int_msk.s.tpaovr = 1;
- spxx_int_msk.s.rsverr = 1;
- spxx_int_msk.s.drwnng = 1;
- spxx_int_msk.s.clserr = 1;
- spxx_int_msk.s.spiovr = 1;
- spxx_int_msk.s.abnorm = 1;
- spxx_int_msk.s.prtnxa = 1;
- cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), spxx_int_msk.u64);
-
- stxx_int_msk.u64 = cvmx_read_csr(CVMX_STXX_INT_MSK(interface));
- stxx_int_msk.s.frmerr = 1;
- stxx_int_msk.s.unxfrm = 1;
- stxx_int_msk.s.nosync = 1;
- stxx_int_msk.s.diperr = 1;
- stxx_int_msk.s.datovr = 1;
- stxx_int_msk.s.ovrbst = 1;
- stxx_int_msk.s.calpar1 = 1;
- stxx_int_msk.s.calpar0 = 1;
- cvmx_write_csr(CVMX_STXX_INT_MSK(interface), stxx_int_msk.u64);
-}
-
-static void cvm_oct_spi_poll(struct net_device *dev)
-{
- static int spi4000_port;
- struct octeon_ethernet *priv = netdev_priv(dev);
- int interface;
-
- for (interface = 0; interface < 2; interface++) {
- if ((priv->port == interface * 16) && need_retrain[interface]) {
- if (cvmx_spi_restart_interface
- (interface, CVMX_SPI_MODE_DUPLEX, 10) == 0) {
- need_retrain[interface] = 0;
- cvm_oct_spi_enable_error_reporting(interface);
- }
- }
-
- /*
- * The SPI4000 TWSI interface is very slow. In order
- * not to bring the system to a crawl, we only poll a
- * single port every second. This means negotiation
- * speed changes take up to 10 seconds, but at least
- * we don't waste absurd amounts of time waiting for
- * TWSI.
- */
- if (priv->port == spi4000_port) {
- /*
- * This function does nothing if it is called on an
- * interface without a SPI4000.
- */
- cvmx_spi4000_check_speed(interface, priv->port);
- /*
- * Normal ordering increments. By decrementing
- * we only match once per iteration.
- */
- spi4000_port--;
- if (spi4000_port < 0)
- spi4000_port = 10;
- }
- }
-}
-
-int cvm_oct_spi_init(struct net_device *dev)
-{
- int r;
- struct octeon_ethernet *priv = netdev_priv(dev);
-
- if (number_spi_ports == 0) {
- r = request_irq(OCTEON_IRQ_RML, cvm_oct_spi_rml_interrupt,
- IRQF_SHARED, "SPI", &number_spi_ports);
- if (r)
- return r;
- }
- number_spi_ports++;
-
- if ((priv->port == 0) || (priv->port == 16)) {
- cvm_oct_spi_enable_error_reporting(INTERFACE(priv->port));
- priv->poll = cvm_oct_spi_poll;
- }
- cvm_oct_common_init(dev);
- return 0;
-}
-
-void cvm_oct_spi_uninit(struct net_device *dev)
-{
- int interface;
-
- cvm_oct_common_uninit(dev);
- number_spi_ports--;
- if (number_spi_ports == 0) {
- for (interface = 0; interface < 2; interface++) {
- cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), 0);
- cvmx_write_csr(CVMX_STXX_INT_MSK(interface), 0);
- }
- free_irq(OCTEON_IRQ_RML, &number_spi_ports);
- }
-}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.