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![Jakub Kicinski](/assets/img/avatar_default.png)
Commit 406f42fa0d
("net-next: When a bond have a massive amount
of VLANs...") introduced a rbtree for faster Ethernet address look
up. To maintain netdev->dev_addr in this tree we need to make all
the writes to it got through appropriate helpers.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
1271 lines
31 KiB
C
1271 lines
31 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* drivers/net/ethernet/micrel/ks8851.c
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*
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* Copyright 2009 Simtec Electronics
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* http://www.simtec.co.uk/
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* Ben Dooks <ben@simtec.co.uk>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/ethtool.h>
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#include <linux/cache.h>
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#include <linux/crc32.h>
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#include <linux/mii.h>
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#include <linux/regulator/consumer.h>
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#include <linux/gpio.h>
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#include <linux/of_gpio.h>
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#include <linux/of_mdio.h>
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#include <linux/of_net.h>
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#include "ks8851.h"
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/**
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* ks8851_lock - register access lock
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* @ks: The chip state
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* @flags: Spinlock flags
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*
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* Claim chip register access lock
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*/
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static void ks8851_lock(struct ks8851_net *ks, unsigned long *flags)
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{
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ks->lock(ks, flags);
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}
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/**
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* ks8851_unlock - register access unlock
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* @ks: The chip state
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* @flags: Spinlock flags
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*
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* Release chip register access lock
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*/
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static void ks8851_unlock(struct ks8851_net *ks, unsigned long *flags)
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{
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ks->unlock(ks, flags);
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}
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/**
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* ks8851_wrreg16 - write 16bit register value to chip
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* @ks: The chip state
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* @reg: The register address
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* @val: The value to write
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*
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* Issue a write to put the value @val into the register specified in @reg.
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*/
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static void ks8851_wrreg16(struct ks8851_net *ks, unsigned int reg,
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unsigned int val)
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{
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ks->wrreg16(ks, reg, val);
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}
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/**
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* ks8851_rdreg16 - read 16 bit register from device
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* @ks: The chip information
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* @reg: The register address
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*
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* Read a 16bit register from the chip, returning the result
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*/
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static unsigned int ks8851_rdreg16(struct ks8851_net *ks,
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unsigned int reg)
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{
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return ks->rdreg16(ks, reg);
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}
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/**
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* ks8851_soft_reset - issue one of the soft reset to the device
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* @ks: The device state.
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* @op: The bit(s) to set in the GRR
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*
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* Issue the relevant soft-reset command to the device's GRR register
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* specified by @op.
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*
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* Note, the delays are in there as a caution to ensure that the reset
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* has time to take effect and then complete. Since the datasheet does
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* not currently specify the exact sequence, we have chosen something
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* that seems to work with our device.
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*/
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static void ks8851_soft_reset(struct ks8851_net *ks, unsigned op)
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{
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ks8851_wrreg16(ks, KS_GRR, op);
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mdelay(1); /* wait a short time to effect reset */
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ks8851_wrreg16(ks, KS_GRR, 0);
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mdelay(1); /* wait for condition to clear */
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}
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/**
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* ks8851_set_powermode - set power mode of the device
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* @ks: The device state
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* @pwrmode: The power mode value to write to KS_PMECR.
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*
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* Change the power mode of the chip.
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*/
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static void ks8851_set_powermode(struct ks8851_net *ks, unsigned pwrmode)
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{
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unsigned pmecr;
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netif_dbg(ks, hw, ks->netdev, "setting power mode %d\n", pwrmode);
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pmecr = ks8851_rdreg16(ks, KS_PMECR);
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pmecr &= ~PMECR_PM_MASK;
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pmecr |= pwrmode;
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ks8851_wrreg16(ks, KS_PMECR, pmecr);
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}
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/**
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* ks8851_write_mac_addr - write mac address to device registers
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* @dev: The network device
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*
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* Update the KS8851 MAC address registers from the address in @dev.
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*
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* This call assumes that the chip is not running, so there is no need to
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* shutdown the RXQ process whilst setting this.
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*/
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static int ks8851_write_mac_addr(struct net_device *dev)
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{
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struct ks8851_net *ks = netdev_priv(dev);
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unsigned long flags;
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u16 val;
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int i;
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ks8851_lock(ks, &flags);
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/*
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* Wake up chip in case it was powered off when stopped; otherwise,
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* the first write to the MAC address does not take effect.
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*/
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ks8851_set_powermode(ks, PMECR_PM_NORMAL);
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for (i = 0; i < ETH_ALEN; i += 2) {
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val = (dev->dev_addr[i] << 8) | dev->dev_addr[i + 1];
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ks8851_wrreg16(ks, KS_MAR(i), val);
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}
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if (!netif_running(dev))
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ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN);
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ks8851_unlock(ks, &flags);
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return 0;
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}
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/**
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* ks8851_read_mac_addr - read mac address from device registers
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* @dev: The network device
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*
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* Update our copy of the KS8851 MAC address from the registers of @dev.
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*/
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static void ks8851_read_mac_addr(struct net_device *dev)
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{
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struct ks8851_net *ks = netdev_priv(dev);
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unsigned long flags;
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u8 addr[ETH_ALEN];
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u16 reg;
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int i;
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ks8851_lock(ks, &flags);
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for (i = 0; i < ETH_ALEN; i += 2) {
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reg = ks8851_rdreg16(ks, KS_MAR(i));
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addr[i] = reg >> 8;
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addr[i + 1] = reg & 0xff;
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}
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eth_hw_addr_set(dev, addr);
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ks8851_unlock(ks, &flags);
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}
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/**
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* ks8851_init_mac - initialise the mac address
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* @ks: The device structure
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* @np: The device node pointer
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*
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* Get or create the initial mac address for the device and then set that
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* into the station address register. A mac address supplied in the device
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* tree takes precedence. Otherwise, if there is an EEPROM present, then
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* we try that. If no valid mac address is found we use eth_random_addr()
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* to create a new one.
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*/
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static void ks8851_init_mac(struct ks8851_net *ks, struct device_node *np)
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{
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struct net_device *dev = ks->netdev;
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int ret;
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ret = of_get_ethdev_address(np, dev);
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if (!ret) {
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ks8851_write_mac_addr(dev);
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return;
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}
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if (ks->rc_ccr & CCR_EEPROM) {
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ks8851_read_mac_addr(dev);
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if (is_valid_ether_addr(dev->dev_addr))
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return;
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netdev_err(ks->netdev, "invalid mac address read %pM\n",
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dev->dev_addr);
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}
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eth_hw_addr_random(dev);
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ks8851_write_mac_addr(dev);
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}
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/**
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* ks8851_dbg_dumpkkt - dump initial packet contents to debug
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* @ks: The device state
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* @rxpkt: The data for the received packet
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*
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* Dump the initial data from the packet to dev_dbg().
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*/
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static void ks8851_dbg_dumpkkt(struct ks8851_net *ks, u8 *rxpkt)
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{
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netdev_dbg(ks->netdev,
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"pkt %02x%02x%02x%02x %02x%02x%02x%02x %02x%02x%02x%02x\n",
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rxpkt[4], rxpkt[5], rxpkt[6], rxpkt[7],
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rxpkt[8], rxpkt[9], rxpkt[10], rxpkt[11],
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rxpkt[12], rxpkt[13], rxpkt[14], rxpkt[15]);
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}
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/**
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* ks8851_rx_skb - receive skbuff
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* @ks: The device state.
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* @skb: The skbuff
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*/
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static void ks8851_rx_skb(struct ks8851_net *ks, struct sk_buff *skb)
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{
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ks->rx_skb(ks, skb);
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}
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/**
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* ks8851_rx_pkts - receive packets from the host
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* @ks: The device information.
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*
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* This is called from the IRQ work queue when the system detects that there
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* are packets in the receive queue. Find out how many packets there are and
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* read them from the FIFO.
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*/
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static void ks8851_rx_pkts(struct ks8851_net *ks)
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{
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struct sk_buff *skb;
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unsigned rxfc;
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unsigned rxlen;
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unsigned rxstat;
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u8 *rxpkt;
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rxfc = (ks8851_rdreg16(ks, KS_RXFCTR) >> 8) & 0xff;
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netif_dbg(ks, rx_status, ks->netdev,
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"%s: %d packets\n", __func__, rxfc);
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/* Currently we're issuing a read per packet, but we could possibly
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* improve the code by issuing a single read, getting the receive
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* header, allocating the packet and then reading the packet data
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* out in one go.
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*
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* This form of operation would require us to hold the SPI bus'
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* chipselect low during the entie transaction to avoid any
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* reset to the data stream coming from the chip.
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*/
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for (; rxfc != 0; rxfc--) {
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rxstat = ks8851_rdreg16(ks, KS_RXFHSR);
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rxlen = ks8851_rdreg16(ks, KS_RXFHBCR) & RXFHBCR_CNT_MASK;
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netif_dbg(ks, rx_status, ks->netdev,
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"rx: stat 0x%04x, len 0x%04x\n", rxstat, rxlen);
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/* the length of the packet includes the 32bit CRC */
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/* set dma read address */
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ks8851_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI | 0x00);
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/* start DMA access */
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ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA);
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if (rxlen > 4) {
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unsigned int rxalign;
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rxlen -= 4;
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rxalign = ALIGN(rxlen, 4);
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skb = netdev_alloc_skb_ip_align(ks->netdev, rxalign);
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if (skb) {
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/* 4 bytes of status header + 4 bytes of
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* garbage: we put them before ethernet
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* header, so that they are copied,
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* but ignored.
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*/
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rxpkt = skb_put(skb, rxlen) - 8;
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ks->rdfifo(ks, rxpkt, rxalign + 8);
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if (netif_msg_pktdata(ks))
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ks8851_dbg_dumpkkt(ks, rxpkt);
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skb->protocol = eth_type_trans(skb, ks->netdev);
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ks8851_rx_skb(ks, skb);
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ks->netdev->stats.rx_packets++;
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ks->netdev->stats.rx_bytes += rxlen;
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}
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}
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/* end DMA access and dequeue packet */
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ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_RRXEF);
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}
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}
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/**
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* ks8851_irq - IRQ handler for dealing with interrupt requests
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* @irq: IRQ number
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* @_ks: cookie
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*
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* This handler is invoked when the IRQ line asserts to find out what happened.
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* As we cannot allow ourselves to sleep in HARDIRQ context, this handler runs
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* in thread context.
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*
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* Read the interrupt status, work out what needs to be done and then clear
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* any of the interrupts that are not needed.
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*/
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static irqreturn_t ks8851_irq(int irq, void *_ks)
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{
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struct ks8851_net *ks = _ks;
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unsigned handled = 0;
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unsigned long flags;
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unsigned int status;
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ks8851_lock(ks, &flags);
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status = ks8851_rdreg16(ks, KS_ISR);
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netif_dbg(ks, intr, ks->netdev,
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"%s: status 0x%04x\n", __func__, status);
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if (status & IRQ_LCI)
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handled |= IRQ_LCI;
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if (status & IRQ_LDI) {
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u16 pmecr = ks8851_rdreg16(ks, KS_PMECR);
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pmecr &= ~PMECR_WKEVT_MASK;
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ks8851_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK);
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handled |= IRQ_LDI;
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}
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if (status & IRQ_RXPSI)
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handled |= IRQ_RXPSI;
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if (status & IRQ_TXI) {
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handled |= IRQ_TXI;
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/* no lock here, tx queue should have been stopped */
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/* update our idea of how much tx space is available to the
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* system */
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ks->tx_space = ks8851_rdreg16(ks, KS_TXMIR);
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netif_dbg(ks, intr, ks->netdev,
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"%s: txspace %d\n", __func__, ks->tx_space);
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}
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if (status & IRQ_RXI)
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handled |= IRQ_RXI;
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if (status & IRQ_SPIBEI) {
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netdev_err(ks->netdev, "%s: spi bus error\n", __func__);
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handled |= IRQ_SPIBEI;
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}
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ks8851_wrreg16(ks, KS_ISR, handled);
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if (status & IRQ_RXI) {
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/* the datasheet says to disable the rx interrupt during
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* packet read-out, however we're masking the interrupt
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* from the device so do not bother masking just the RX
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* from the device. */
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ks8851_rx_pkts(ks);
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}
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/* if something stopped the rx process, probably due to wanting
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* to change the rx settings, then do something about restarting
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* it. */
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if (status & IRQ_RXPSI) {
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struct ks8851_rxctrl *rxc = &ks->rxctrl;
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/* update the multicast hash table */
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ks8851_wrreg16(ks, KS_MAHTR0, rxc->mchash[0]);
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ks8851_wrreg16(ks, KS_MAHTR1, rxc->mchash[1]);
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ks8851_wrreg16(ks, KS_MAHTR2, rxc->mchash[2]);
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ks8851_wrreg16(ks, KS_MAHTR3, rxc->mchash[3]);
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ks8851_wrreg16(ks, KS_RXCR2, rxc->rxcr2);
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ks8851_wrreg16(ks, KS_RXCR1, rxc->rxcr1);
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}
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ks8851_unlock(ks, &flags);
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if (status & IRQ_LCI)
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mii_check_link(&ks->mii);
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if (status & IRQ_TXI)
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netif_wake_queue(ks->netdev);
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return IRQ_HANDLED;
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}
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/**
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* ks8851_flush_tx_work - flush outstanding TX work
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* @ks: The device state
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*/
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static void ks8851_flush_tx_work(struct ks8851_net *ks)
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{
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if (ks->flush_tx_work)
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ks->flush_tx_work(ks);
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}
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/**
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* ks8851_net_open - open network device
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* @dev: The network device being opened.
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*
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* Called when the network device is marked active, such as a user executing
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* 'ifconfig up' on the device.
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*/
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static int ks8851_net_open(struct net_device *dev)
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{
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struct ks8851_net *ks = netdev_priv(dev);
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unsigned long flags;
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int ret;
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ret = request_threaded_irq(dev->irq, NULL, ks8851_irq,
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IRQF_TRIGGER_LOW | IRQF_ONESHOT,
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dev->name, ks);
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if (ret < 0) {
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netdev_err(dev, "failed to get irq\n");
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return ret;
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}
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/* lock the card, even if we may not actually be doing anything
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* else at the moment */
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ks8851_lock(ks, &flags);
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netif_dbg(ks, ifup, ks->netdev, "opening\n");
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/* bring chip out of any power saving mode it was in */
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ks8851_set_powermode(ks, PMECR_PM_NORMAL);
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/* issue a soft reset to the RX/TX QMU to put it into a known
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* state. */
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ks8851_soft_reset(ks, GRR_QMU);
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/* setup transmission parameters */
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ks8851_wrreg16(ks, KS_TXCR, (TXCR_TXE | /* enable transmit process */
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TXCR_TXPE | /* pad to min length */
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TXCR_TXCRC | /* add CRC */
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TXCR_TXFCE)); /* enable flow control */
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/* auto-increment tx data, reset tx pointer */
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ks8851_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI);
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/* setup receiver control */
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ks8851_wrreg16(ks, KS_RXCR1, (RXCR1_RXPAFMA | /* from mac filter */
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RXCR1_RXFCE | /* enable flow control */
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RXCR1_RXBE | /* broadcast enable */
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RXCR1_RXUE | /* unicast enable */
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RXCR1_RXE)); /* enable rx block */
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/* transfer entire frames out in one go */
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ks8851_wrreg16(ks, KS_RXCR2, RXCR2_SRDBL_FRAME);
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/* set receive counter timeouts */
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ks8851_wrreg16(ks, KS_RXDTTR, 1000); /* 1ms after first frame to IRQ */
|
|
ks8851_wrreg16(ks, KS_RXDBCTR, 4096); /* >4Kbytes in buffer to IRQ */
|
|
ks8851_wrreg16(ks, KS_RXFCTR, 10); /* 10 frames to IRQ */
|
|
|
|
ks->rc_rxqcr = (RXQCR_RXFCTE | /* IRQ on frame count exceeded */
|
|
RXQCR_RXDBCTE | /* IRQ on byte count exceeded */
|
|
RXQCR_RXDTTE); /* IRQ on time exceeded */
|
|
|
|
ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr);
|
|
|
|
/* clear then enable interrupts */
|
|
ks8851_wrreg16(ks, KS_ISR, ks->rc_ier);
|
|
ks8851_wrreg16(ks, KS_IER, ks->rc_ier);
|
|
|
|
netif_start_queue(ks->netdev);
|
|
|
|
netif_dbg(ks, ifup, ks->netdev, "network device up\n");
|
|
|
|
ks8851_unlock(ks, &flags);
|
|
mii_check_link(&ks->mii);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ks8851_net_stop - close network device
|
|
* @dev: The device being closed.
|
|
*
|
|
* Called to close down a network device which has been active. Cancell any
|
|
* work, shutdown the RX and TX process and then place the chip into a low
|
|
* power state whilst it is not being used.
|
|
*/
|
|
static int ks8851_net_stop(struct net_device *dev)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
unsigned long flags;
|
|
|
|
netif_info(ks, ifdown, dev, "shutting down\n");
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
ks8851_lock(ks, &flags);
|
|
/* turn off the IRQs and ack any outstanding */
|
|
ks8851_wrreg16(ks, KS_IER, 0x0000);
|
|
ks8851_wrreg16(ks, KS_ISR, 0xffff);
|
|
ks8851_unlock(ks, &flags);
|
|
|
|
/* stop any outstanding work */
|
|
ks8851_flush_tx_work(ks);
|
|
flush_work(&ks->rxctrl_work);
|
|
|
|
ks8851_lock(ks, &flags);
|
|
/* shutdown RX process */
|
|
ks8851_wrreg16(ks, KS_RXCR1, 0x0000);
|
|
|
|
/* shutdown TX process */
|
|
ks8851_wrreg16(ks, KS_TXCR, 0x0000);
|
|
|
|
/* set powermode to soft power down to save power */
|
|
ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN);
|
|
ks8851_unlock(ks, &flags);
|
|
|
|
/* ensure any queued tx buffers are dumped */
|
|
while (!skb_queue_empty(&ks->txq)) {
|
|
struct sk_buff *txb = skb_dequeue(&ks->txq);
|
|
|
|
netif_dbg(ks, ifdown, ks->netdev,
|
|
"%s: freeing txb %p\n", __func__, txb);
|
|
|
|
dev_kfree_skb(txb);
|
|
}
|
|
|
|
free_irq(dev->irq, ks);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ks8851_start_xmit - transmit packet
|
|
* @skb: The buffer to transmit
|
|
* @dev: The device used to transmit the packet.
|
|
*
|
|
* Called by the network layer to transmit the @skb. Queue the packet for
|
|
* the device and schedule the necessary work to transmit the packet when
|
|
* it is free.
|
|
*
|
|
* We do this to firstly avoid sleeping with the network device locked,
|
|
* and secondly so we can round up more than one packet to transmit which
|
|
* means we can try and avoid generating too many transmit done interrupts.
|
|
*/
|
|
static netdev_tx_t ks8851_start_xmit(struct sk_buff *skb,
|
|
struct net_device *dev)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
|
|
return ks->start_xmit(skb, dev);
|
|
}
|
|
|
|
/**
|
|
* ks8851_rxctrl_work - work handler to change rx mode
|
|
* @work: The work structure this belongs to.
|
|
*
|
|
* Lock the device and issue the necessary changes to the receive mode from
|
|
* the network device layer. This is done so that we can do this without
|
|
* having to sleep whilst holding the network device lock.
|
|
*
|
|
* Since the recommendation from Micrel is that the RXQ is shutdown whilst the
|
|
* receive parameters are programmed, we issue a write to disable the RXQ and
|
|
* then wait for the interrupt handler to be triggered once the RXQ shutdown is
|
|
* complete. The interrupt handler then writes the new values into the chip.
|
|
*/
|
|
static void ks8851_rxctrl_work(struct work_struct *work)
|
|
{
|
|
struct ks8851_net *ks = container_of(work, struct ks8851_net, rxctrl_work);
|
|
unsigned long flags;
|
|
|
|
ks8851_lock(ks, &flags);
|
|
|
|
/* need to shutdown RXQ before modifying filter parameters */
|
|
ks8851_wrreg16(ks, KS_RXCR1, 0x00);
|
|
|
|
ks8851_unlock(ks, &flags);
|
|
}
|
|
|
|
static void ks8851_set_rx_mode(struct net_device *dev)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
struct ks8851_rxctrl rxctrl;
|
|
|
|
memset(&rxctrl, 0, sizeof(rxctrl));
|
|
|
|
if (dev->flags & IFF_PROMISC) {
|
|
/* interface to receive everything */
|
|
|
|
rxctrl.rxcr1 = RXCR1_RXAE | RXCR1_RXINVF;
|
|
} else if (dev->flags & IFF_ALLMULTI) {
|
|
/* accept all multicast packets */
|
|
|
|
rxctrl.rxcr1 = (RXCR1_RXME | RXCR1_RXAE |
|
|
RXCR1_RXPAFMA | RXCR1_RXMAFMA);
|
|
} else if (dev->flags & IFF_MULTICAST && !netdev_mc_empty(dev)) {
|
|
struct netdev_hw_addr *ha;
|
|
u32 crc;
|
|
|
|
/* accept some multicast */
|
|
|
|
netdev_for_each_mc_addr(ha, dev) {
|
|
crc = ether_crc(ETH_ALEN, ha->addr);
|
|
crc >>= (32 - 6); /* get top six bits */
|
|
|
|
rxctrl.mchash[crc >> 4] |= (1 << (crc & 0xf));
|
|
}
|
|
|
|
rxctrl.rxcr1 = RXCR1_RXME | RXCR1_RXPAFMA;
|
|
} else {
|
|
/* just accept broadcast / unicast */
|
|
rxctrl.rxcr1 = RXCR1_RXPAFMA;
|
|
}
|
|
|
|
rxctrl.rxcr1 |= (RXCR1_RXUE | /* unicast enable */
|
|
RXCR1_RXBE | /* broadcast enable */
|
|
RXCR1_RXE | /* RX process enable */
|
|
RXCR1_RXFCE); /* enable flow control */
|
|
|
|
rxctrl.rxcr2 |= RXCR2_SRDBL_FRAME;
|
|
|
|
/* schedule work to do the actual set of the data if needed */
|
|
|
|
spin_lock(&ks->statelock);
|
|
|
|
if (memcmp(&rxctrl, &ks->rxctrl, sizeof(rxctrl)) != 0) {
|
|
memcpy(&ks->rxctrl, &rxctrl, sizeof(ks->rxctrl));
|
|
schedule_work(&ks->rxctrl_work);
|
|
}
|
|
|
|
spin_unlock(&ks->statelock);
|
|
}
|
|
|
|
static int ks8851_set_mac_address(struct net_device *dev, void *addr)
|
|
{
|
|
struct sockaddr *sa = addr;
|
|
|
|
if (netif_running(dev))
|
|
return -EBUSY;
|
|
|
|
if (!is_valid_ether_addr(sa->sa_data))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
eth_hw_addr_set(dev, sa->sa_data);
|
|
return ks8851_write_mac_addr(dev);
|
|
}
|
|
|
|
static int ks8851_net_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
|
|
if (!netif_running(dev))
|
|
return -EINVAL;
|
|
|
|
return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL);
|
|
}
|
|
|
|
static const struct net_device_ops ks8851_netdev_ops = {
|
|
.ndo_open = ks8851_net_open,
|
|
.ndo_stop = ks8851_net_stop,
|
|
.ndo_eth_ioctl = ks8851_net_ioctl,
|
|
.ndo_start_xmit = ks8851_start_xmit,
|
|
.ndo_set_mac_address = ks8851_set_mac_address,
|
|
.ndo_set_rx_mode = ks8851_set_rx_mode,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
};
|
|
|
|
/* ethtool support */
|
|
|
|
static void ks8851_get_drvinfo(struct net_device *dev,
|
|
struct ethtool_drvinfo *di)
|
|
{
|
|
strlcpy(di->driver, "KS8851", sizeof(di->driver));
|
|
strlcpy(di->version, "1.00", sizeof(di->version));
|
|
strlcpy(di->bus_info, dev_name(dev->dev.parent), sizeof(di->bus_info));
|
|
}
|
|
|
|
static u32 ks8851_get_msglevel(struct net_device *dev)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
return ks->msg_enable;
|
|
}
|
|
|
|
static void ks8851_set_msglevel(struct net_device *dev, u32 to)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
ks->msg_enable = to;
|
|
}
|
|
|
|
static int ks8851_get_link_ksettings(struct net_device *dev,
|
|
struct ethtool_link_ksettings *cmd)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
|
|
mii_ethtool_get_link_ksettings(&ks->mii, cmd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ks8851_set_link_ksettings(struct net_device *dev,
|
|
const struct ethtool_link_ksettings *cmd)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
return mii_ethtool_set_link_ksettings(&ks->mii, cmd);
|
|
}
|
|
|
|
static u32 ks8851_get_link(struct net_device *dev)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
return mii_link_ok(&ks->mii);
|
|
}
|
|
|
|
static int ks8851_nway_reset(struct net_device *dev)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
return mii_nway_restart(&ks->mii);
|
|
}
|
|
|
|
/* EEPROM support */
|
|
|
|
static void ks8851_eeprom_regread(struct eeprom_93cx6 *ee)
|
|
{
|
|
struct ks8851_net *ks = ee->data;
|
|
unsigned val;
|
|
|
|
val = ks8851_rdreg16(ks, KS_EEPCR);
|
|
|
|
ee->reg_data_out = (val & EEPCR_EESB) ? 1 : 0;
|
|
ee->reg_data_clock = (val & EEPCR_EESCK) ? 1 : 0;
|
|
ee->reg_chip_select = (val & EEPCR_EECS) ? 1 : 0;
|
|
}
|
|
|
|
static void ks8851_eeprom_regwrite(struct eeprom_93cx6 *ee)
|
|
{
|
|
struct ks8851_net *ks = ee->data;
|
|
unsigned val = EEPCR_EESA; /* default - eeprom access on */
|
|
|
|
if (ee->drive_data)
|
|
val |= EEPCR_EESRWA;
|
|
if (ee->reg_data_in)
|
|
val |= EEPCR_EEDO;
|
|
if (ee->reg_data_clock)
|
|
val |= EEPCR_EESCK;
|
|
if (ee->reg_chip_select)
|
|
val |= EEPCR_EECS;
|
|
|
|
ks8851_wrreg16(ks, KS_EEPCR, val);
|
|
}
|
|
|
|
/**
|
|
* ks8851_eeprom_claim - claim device EEPROM and activate the interface
|
|
* @ks: The network device state.
|
|
*
|
|
* Check for the presence of an EEPROM, and then activate software access
|
|
* to the device.
|
|
*/
|
|
static int ks8851_eeprom_claim(struct ks8851_net *ks)
|
|
{
|
|
/* start with clock low, cs high */
|
|
ks8851_wrreg16(ks, KS_EEPCR, EEPCR_EESA | EEPCR_EECS);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ks8851_eeprom_release - release the EEPROM interface
|
|
* @ks: The device state
|
|
*
|
|
* Release the software access to the device EEPROM
|
|
*/
|
|
static void ks8851_eeprom_release(struct ks8851_net *ks)
|
|
{
|
|
unsigned val = ks8851_rdreg16(ks, KS_EEPCR);
|
|
|
|
ks8851_wrreg16(ks, KS_EEPCR, val & ~EEPCR_EESA);
|
|
}
|
|
|
|
#define KS_EEPROM_MAGIC (0x00008851)
|
|
|
|
static int ks8851_set_eeprom(struct net_device *dev,
|
|
struct ethtool_eeprom *ee, u8 *data)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
int offset = ee->offset;
|
|
unsigned long flags;
|
|
int len = ee->len;
|
|
u16 tmp;
|
|
|
|
/* currently only support byte writing */
|
|
if (len != 1)
|
|
return -EINVAL;
|
|
|
|
if (ee->magic != KS_EEPROM_MAGIC)
|
|
return -EINVAL;
|
|
|
|
if (!(ks->rc_ccr & CCR_EEPROM))
|
|
return -ENOENT;
|
|
|
|
ks8851_lock(ks, &flags);
|
|
|
|
ks8851_eeprom_claim(ks);
|
|
|
|
eeprom_93cx6_wren(&ks->eeprom, true);
|
|
|
|
/* ethtool currently only supports writing bytes, which means
|
|
* we have to read/modify/write our 16bit EEPROMs */
|
|
|
|
eeprom_93cx6_read(&ks->eeprom, offset/2, &tmp);
|
|
|
|
if (offset & 1) {
|
|
tmp &= 0xff;
|
|
tmp |= *data << 8;
|
|
} else {
|
|
tmp &= 0xff00;
|
|
tmp |= *data;
|
|
}
|
|
|
|
eeprom_93cx6_write(&ks->eeprom, offset/2, tmp);
|
|
eeprom_93cx6_wren(&ks->eeprom, false);
|
|
|
|
ks8851_eeprom_release(ks);
|
|
ks8851_unlock(ks, &flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ks8851_get_eeprom(struct net_device *dev,
|
|
struct ethtool_eeprom *ee, u8 *data)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
int offset = ee->offset;
|
|
unsigned long flags;
|
|
int len = ee->len;
|
|
|
|
/* must be 2 byte aligned */
|
|
if (len & 1 || offset & 1)
|
|
return -EINVAL;
|
|
|
|
if (!(ks->rc_ccr & CCR_EEPROM))
|
|
return -ENOENT;
|
|
|
|
ks8851_lock(ks, &flags);
|
|
|
|
ks8851_eeprom_claim(ks);
|
|
|
|
ee->magic = KS_EEPROM_MAGIC;
|
|
|
|
eeprom_93cx6_multiread(&ks->eeprom, offset/2, (__le16 *)data, len/2);
|
|
ks8851_eeprom_release(ks);
|
|
ks8851_unlock(ks, &flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ks8851_get_eeprom_len(struct net_device *dev)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
|
|
/* currently, we assume it is an 93C46 attached, so return 128 */
|
|
return ks->rc_ccr & CCR_EEPROM ? 128 : 0;
|
|
}
|
|
|
|
static const struct ethtool_ops ks8851_ethtool_ops = {
|
|
.get_drvinfo = ks8851_get_drvinfo,
|
|
.get_msglevel = ks8851_get_msglevel,
|
|
.set_msglevel = ks8851_set_msglevel,
|
|
.get_link = ks8851_get_link,
|
|
.nway_reset = ks8851_nway_reset,
|
|
.get_eeprom_len = ks8851_get_eeprom_len,
|
|
.get_eeprom = ks8851_get_eeprom,
|
|
.set_eeprom = ks8851_set_eeprom,
|
|
.get_link_ksettings = ks8851_get_link_ksettings,
|
|
.set_link_ksettings = ks8851_set_link_ksettings,
|
|
};
|
|
|
|
/* MII interface controls */
|
|
|
|
/**
|
|
* ks8851_phy_reg - convert MII register into a KS8851 register
|
|
* @reg: MII register number.
|
|
*
|
|
* Return the KS8851 register number for the corresponding MII PHY register
|
|
* if possible. Return zero if the MII register has no direct mapping to the
|
|
* KS8851 register set.
|
|
*/
|
|
static int ks8851_phy_reg(int reg)
|
|
{
|
|
switch (reg) {
|
|
case MII_BMCR:
|
|
return KS_P1MBCR;
|
|
case MII_BMSR:
|
|
return KS_P1MBSR;
|
|
case MII_PHYSID1:
|
|
return KS_PHY1ILR;
|
|
case MII_PHYSID2:
|
|
return KS_PHY1IHR;
|
|
case MII_ADVERTISE:
|
|
return KS_P1ANAR;
|
|
case MII_LPA:
|
|
return KS_P1ANLPR;
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int ks8851_phy_read_common(struct net_device *dev, int phy_addr, int reg)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
unsigned long flags;
|
|
int result;
|
|
int ksreg;
|
|
|
|
ksreg = ks8851_phy_reg(reg);
|
|
if (ksreg < 0)
|
|
return ksreg;
|
|
|
|
ks8851_lock(ks, &flags);
|
|
result = ks8851_rdreg16(ks, ksreg);
|
|
ks8851_unlock(ks, &flags);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* ks8851_phy_read - MII interface PHY register read.
|
|
* @dev: The network device the PHY is on.
|
|
* @phy_addr: Address of PHY (ignored as we only have one)
|
|
* @reg: The register to read.
|
|
*
|
|
* This call reads data from the PHY register specified in @reg. Since the
|
|
* device does not support all the MII registers, the non-existent values
|
|
* are always returned as zero.
|
|
*
|
|
* We return zero for unsupported registers as the MII code does not check
|
|
* the value returned for any error status, and simply returns it to the
|
|
* caller. The mii-tool that the driver was tested with takes any -ve error
|
|
* as real PHY capabilities, thus displaying incorrect data to the user.
|
|
*/
|
|
static int ks8851_phy_read(struct net_device *dev, int phy_addr, int reg)
|
|
{
|
|
int ret;
|
|
|
|
ret = ks8851_phy_read_common(dev, phy_addr, reg);
|
|
if (ret < 0)
|
|
return 0x0; /* no error return allowed, so use zero */
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void ks8851_phy_write(struct net_device *dev,
|
|
int phy, int reg, int value)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(dev);
|
|
unsigned long flags;
|
|
int ksreg;
|
|
|
|
ksreg = ks8851_phy_reg(reg);
|
|
if (ksreg >= 0) {
|
|
ks8851_lock(ks, &flags);
|
|
ks8851_wrreg16(ks, ksreg, value);
|
|
ks8851_unlock(ks, &flags);
|
|
}
|
|
}
|
|
|
|
static int ks8851_mdio_read(struct mii_bus *bus, int phy_id, int reg)
|
|
{
|
|
struct ks8851_net *ks = bus->priv;
|
|
|
|
if (phy_id != 0)
|
|
return -EOPNOTSUPP;
|
|
|
|
/* KS8851 PHY ID registers are swapped in HW, swap them back. */
|
|
if (reg == MII_PHYSID1)
|
|
reg = MII_PHYSID2;
|
|
else if (reg == MII_PHYSID2)
|
|
reg = MII_PHYSID1;
|
|
|
|
return ks8851_phy_read_common(ks->netdev, phy_id, reg);
|
|
}
|
|
|
|
static int ks8851_mdio_write(struct mii_bus *bus, int phy_id, int reg, u16 val)
|
|
{
|
|
struct ks8851_net *ks = bus->priv;
|
|
|
|
ks8851_phy_write(ks->netdev, phy_id, reg, val);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ks8851_read_selftest - read the selftest memory info.
|
|
* @ks: The device state
|
|
*
|
|
* Read and check the TX/RX memory selftest information.
|
|
*/
|
|
static void ks8851_read_selftest(struct ks8851_net *ks)
|
|
{
|
|
unsigned both_done = MBIR_TXMBF | MBIR_RXMBF;
|
|
unsigned rd;
|
|
|
|
rd = ks8851_rdreg16(ks, KS_MBIR);
|
|
|
|
if ((rd & both_done) != both_done) {
|
|
netdev_warn(ks->netdev, "Memory selftest not finished\n");
|
|
return;
|
|
}
|
|
|
|
if (rd & MBIR_TXMBFA)
|
|
netdev_err(ks->netdev, "TX memory selftest fail\n");
|
|
|
|
if (rd & MBIR_RXMBFA)
|
|
netdev_err(ks->netdev, "RX memory selftest fail\n");
|
|
}
|
|
|
|
/* driver bus management functions */
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
|
|
int ks8851_suspend(struct device *dev)
|
|
{
|
|
struct ks8851_net *ks = dev_get_drvdata(dev);
|
|
struct net_device *netdev = ks->netdev;
|
|
|
|
if (netif_running(netdev)) {
|
|
netif_device_detach(netdev);
|
|
ks8851_net_stop(netdev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ks8851_suspend);
|
|
|
|
int ks8851_resume(struct device *dev)
|
|
{
|
|
struct ks8851_net *ks = dev_get_drvdata(dev);
|
|
struct net_device *netdev = ks->netdev;
|
|
|
|
if (netif_running(netdev)) {
|
|
ks8851_net_open(netdev);
|
|
netif_device_attach(netdev);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ks8851_resume);
|
|
#endif
|
|
|
|
static int ks8851_register_mdiobus(struct ks8851_net *ks, struct device *dev)
|
|
{
|
|
struct mii_bus *mii_bus;
|
|
int ret;
|
|
|
|
mii_bus = mdiobus_alloc();
|
|
if (!mii_bus)
|
|
return -ENOMEM;
|
|
|
|
mii_bus->name = "ks8851_eth_mii";
|
|
mii_bus->read = ks8851_mdio_read;
|
|
mii_bus->write = ks8851_mdio_write;
|
|
mii_bus->priv = ks;
|
|
mii_bus->parent = dev;
|
|
mii_bus->phy_mask = ~((u32)BIT(0));
|
|
snprintf(mii_bus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
|
|
|
|
ret = mdiobus_register(mii_bus);
|
|
if (ret)
|
|
goto err_mdiobus_register;
|
|
|
|
ks->mii_bus = mii_bus;
|
|
|
|
return 0;
|
|
|
|
err_mdiobus_register:
|
|
mdiobus_free(mii_bus);
|
|
return ret;
|
|
}
|
|
|
|
static void ks8851_unregister_mdiobus(struct ks8851_net *ks)
|
|
{
|
|
mdiobus_unregister(ks->mii_bus);
|
|
mdiobus_free(ks->mii_bus);
|
|
}
|
|
|
|
int ks8851_probe_common(struct net_device *netdev, struct device *dev,
|
|
int msg_en)
|
|
{
|
|
struct ks8851_net *ks = netdev_priv(netdev);
|
|
unsigned cider;
|
|
int gpio;
|
|
int ret;
|
|
|
|
ks->netdev = netdev;
|
|
ks->tx_space = 6144;
|
|
|
|
gpio = of_get_named_gpio_flags(dev->of_node, "reset-gpios", 0, NULL);
|
|
if (gpio == -EPROBE_DEFER)
|
|
return gpio;
|
|
|
|
ks->gpio = gpio;
|
|
if (gpio_is_valid(gpio)) {
|
|
ret = devm_gpio_request_one(dev, gpio,
|
|
GPIOF_OUT_INIT_LOW, "ks8851_rst_n");
|
|
if (ret) {
|
|
dev_err(dev, "reset gpio request failed\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
ks->vdd_io = devm_regulator_get(dev, "vdd-io");
|
|
if (IS_ERR(ks->vdd_io)) {
|
|
ret = PTR_ERR(ks->vdd_io);
|
|
goto err_reg_io;
|
|
}
|
|
|
|
ret = regulator_enable(ks->vdd_io);
|
|
if (ret) {
|
|
dev_err(dev, "regulator vdd_io enable fail: %d\n", ret);
|
|
goto err_reg_io;
|
|
}
|
|
|
|
ks->vdd_reg = devm_regulator_get(dev, "vdd");
|
|
if (IS_ERR(ks->vdd_reg)) {
|
|
ret = PTR_ERR(ks->vdd_reg);
|
|
goto err_reg;
|
|
}
|
|
|
|
ret = regulator_enable(ks->vdd_reg);
|
|
if (ret) {
|
|
dev_err(dev, "regulator vdd enable fail: %d\n", ret);
|
|
goto err_reg;
|
|
}
|
|
|
|
if (gpio_is_valid(gpio)) {
|
|
usleep_range(10000, 11000);
|
|
gpio_set_value(gpio, 1);
|
|
}
|
|
|
|
spin_lock_init(&ks->statelock);
|
|
|
|
INIT_WORK(&ks->rxctrl_work, ks8851_rxctrl_work);
|
|
|
|
SET_NETDEV_DEV(netdev, dev);
|
|
|
|
/* setup EEPROM state */
|
|
ks->eeprom.data = ks;
|
|
ks->eeprom.width = PCI_EEPROM_WIDTH_93C46;
|
|
ks->eeprom.register_read = ks8851_eeprom_regread;
|
|
ks->eeprom.register_write = ks8851_eeprom_regwrite;
|
|
|
|
/* setup mii state */
|
|
ks->mii.dev = netdev;
|
|
ks->mii.phy_id = 1;
|
|
ks->mii.phy_id_mask = 1;
|
|
ks->mii.reg_num_mask = 0xf;
|
|
ks->mii.mdio_read = ks8851_phy_read;
|
|
ks->mii.mdio_write = ks8851_phy_write;
|
|
|
|
dev_info(dev, "message enable is %d\n", msg_en);
|
|
|
|
ret = ks8851_register_mdiobus(ks, dev);
|
|
if (ret)
|
|
goto err_mdio;
|
|
|
|
/* set the default message enable */
|
|
ks->msg_enable = netif_msg_init(msg_en, NETIF_MSG_DRV |
|
|
NETIF_MSG_PROBE |
|
|
NETIF_MSG_LINK);
|
|
|
|
skb_queue_head_init(&ks->txq);
|
|
|
|
netdev->ethtool_ops = &ks8851_ethtool_ops;
|
|
|
|
dev_set_drvdata(dev, ks);
|
|
|
|
netif_carrier_off(ks->netdev);
|
|
netdev->if_port = IF_PORT_100BASET;
|
|
netdev->netdev_ops = &ks8851_netdev_ops;
|
|
|
|
/* issue a global soft reset to reset the device. */
|
|
ks8851_soft_reset(ks, GRR_GSR);
|
|
|
|
/* simple check for a valid chip being connected to the bus */
|
|
cider = ks8851_rdreg16(ks, KS_CIDER);
|
|
if ((cider & ~CIDER_REV_MASK) != CIDER_ID) {
|
|
dev_err(dev, "failed to read device ID\n");
|
|
ret = -ENODEV;
|
|
goto err_id;
|
|
}
|
|
|
|
/* cache the contents of the CCR register for EEPROM, etc. */
|
|
ks->rc_ccr = ks8851_rdreg16(ks, KS_CCR);
|
|
|
|
ks8851_read_selftest(ks);
|
|
ks8851_init_mac(ks, dev->of_node);
|
|
|
|
ret = register_netdev(netdev);
|
|
if (ret) {
|
|
dev_err(dev, "failed to register network device\n");
|
|
goto err_id;
|
|
}
|
|
|
|
netdev_info(netdev, "revision %d, MAC %pM, IRQ %d, %s EEPROM\n",
|
|
CIDER_REV_GET(cider), netdev->dev_addr, netdev->irq,
|
|
ks->rc_ccr & CCR_EEPROM ? "has" : "no");
|
|
|
|
return 0;
|
|
|
|
err_id:
|
|
ks8851_unregister_mdiobus(ks);
|
|
err_mdio:
|
|
if (gpio_is_valid(gpio))
|
|
gpio_set_value(gpio, 0);
|
|
regulator_disable(ks->vdd_reg);
|
|
err_reg:
|
|
regulator_disable(ks->vdd_io);
|
|
err_reg_io:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ks8851_probe_common);
|
|
|
|
void ks8851_remove_common(struct device *dev)
|
|
{
|
|
struct ks8851_net *priv = dev_get_drvdata(dev);
|
|
|
|
ks8851_unregister_mdiobus(priv);
|
|
|
|
if (netif_msg_drv(priv))
|
|
dev_info(dev, "remove\n");
|
|
|
|
unregister_netdev(priv->netdev);
|
|
if (gpio_is_valid(priv->gpio))
|
|
gpio_set_value(priv->gpio, 0);
|
|
regulator_disable(priv->vdd_reg);
|
|
regulator_disable(priv->vdd_io);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ks8851_remove_common);
|
|
|
|
MODULE_DESCRIPTION("KS8851 Network driver");
|
|
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
|
|
MODULE_LICENSE("GPL");
|