+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/**
- * drivers/net/ethernet/micrel/ks8851_mll.c
- * Copyright (c) 2009 Micrel Inc.
- */
-
-/* Supports:
- * KS8851 16bit MLL chip from Micrel Inc.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/cache.h>
-#include <linux/crc32.h>
-#include <linux/crc32poly.h>
-#include <linux/mii.h>
-#include <linux/platform_device.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/ks8851_mll.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/of_net.h>
-
-#include "ks8851.h"
-
-#define DRV_NAME "ks8851_mll"
-
-static u8 KS_DEFAULT_MAC_ADDRESS[] = { 0x00, 0x10, 0xA1, 0x86, 0x95, 0x11 };
-#define MAX_RECV_FRAMES 255
-#define MAX_BUF_SIZE 2048
-#define TX_BUF_SIZE 2000
-#define RX_BUF_SIZE 2000
-
-#define RXCR1_FILTER_MASK (RXCR1_RXINVF | RXCR1_RXAE | \
- RXCR1_RXMAFMA | RXCR1_RXPAFMA)
-#define RXQCR_CMD_CNTL (RXQCR_RXFCTE|RXQCR_ADRFE)
-
-#define ENUM_BUS_NONE 0
-#define ENUM_BUS_8BIT 1
-#define ENUM_BUS_16BIT 2
-#define ENUM_BUS_32BIT 3
-
-#define MAX_MCAST_LST 32
-#define HW_MCAST_SIZE 8
-
-/**
- * union ks_tx_hdr - tx header data
- * @txb: The header as bytes
- * @txw: The header as 16bit, little-endian words
- *
- * A dual representation of the tx header data to allow
- * access to individual bytes, and to allow 16bit accesses
- * with 16bit alignment.
- */
-union ks_tx_hdr {
- u8 txb[4];
- __le16 txw[2];
-};
-
-/**
- * struct ks_net - KS8851 driver private data
- * @net_device : The network device we're bound to
- * @hw_addr : start address of data register.
- * @hw_addr_cmd : start address of command register.
- * @txh : temporaly buffer to save status/length.
- * @lock : Lock to ensure that the device is not accessed when busy.
- * @pdev : Pointer to platform device.
- * @mii : The MII state information for the mii calls.
- * @frame_head_info : frame header information for multi-pkt rx.
- * @statelock : Lock on this structure for tx list.
- * @msg_enable : The message flags controlling driver output (see ethtool).
- * @frame_cnt : number of frames received.
- * @bus_width : i/o bus width.
- * @rc_rxqcr : Cached copy of KS_RXQCR.
- * @rc_txcr : Cached copy of KS_TXCR.
- * @rc_ier : Cached copy of KS_IER.
- * @sharedbus : Multipex(addr and data bus) mode indicator.
- * @cmd_reg_cache : command register cached.
- * @cmd_reg_cache_int : command register cached. Used in the irq handler.
- * @promiscuous : promiscuous mode indicator.
- * @all_mcast : mutlicast indicator.
- * @mcast_lst_size : size of multicast list.
- * @mcast_lst : multicast list.
- * @mcast_bits : multicast enabed.
- * @mac_addr : MAC address assigned to this device.
- * @fid : frame id.
- * @extra_byte : number of extra byte prepended rx pkt.
- * @enabled : indicator this device works.
- *
- * The @lock ensures that the chip is protected when certain operations are
- * in progress. When the read or write packet transfer is in progress, most
- * of the chip registers are not accessible until the transfer is finished and
- * the DMA has been de-asserted.
- *
- * The @statelock is used to protect information in the structure which may
- * need to be accessed via several sources, such as the network driver layer
- * or one of the work queues.
- *
- */
-
-/* Receive multiplex framer header info */
-struct type_frame_head {
- u16 sts; /* Frame status */
- u16 len; /* Byte count */
-};
-
-struct ks_net {
- struct net_device *netdev;
- void __iomem *hw_addr;
- void __iomem *hw_addr_cmd;
- union ks_tx_hdr txh ____cacheline_aligned;
- struct mutex lock; /* spinlock to be interrupt safe */
- struct platform_device *pdev;
- struct mii_if_info mii;
- struct type_frame_head *frame_head_info;
- spinlock_t statelock;
- u32 msg_enable;
- u32 frame_cnt;
- int bus_width;
-
- u16 rc_rxqcr;
- u16 rc_txcr;
- u16 rc_ier;
- u16 sharedbus;
- u16 cmd_reg_cache;
- u16 cmd_reg_cache_int;
- u16 promiscuous;
- u16 all_mcast;
- u16 mcast_lst_size;
- u8 mcast_lst[MAX_MCAST_LST][ETH_ALEN];
- u8 mcast_bits[HW_MCAST_SIZE];
- u8 mac_addr[6];
- u8 fid;
- u8 extra_byte;
- u8 enabled;
-};
-
-static int msg_enable;
-
-#define BE3 0x8000 /* Byte Enable 3 */
-#define BE2 0x4000 /* Byte Enable 2 */
-#define BE1 0x2000 /* Byte Enable 1 */
-#define BE0 0x1000 /* Byte Enable 0 */
-
-/* register read/write calls.
- *
- * All these calls issue transactions to access the chip's registers. They
- * all require that the necessary lock is held to prevent accesses when the
- * chip is busy transferring packet data (RX/TX FIFO accesses).
- */
-
-/**
- * ks_check_endian - Check whether endianness of the bus is correct
- * @ks : The chip information
- *
- * The KS8851-16MLL EESK pin allows selecting the endianness of the 16bit
- * bus. To maintain optimum performance, the bus endianness should be set
- * such that it matches the endianness of the CPU.
- */
-
-static int ks_check_endian(struct ks_net *ks)
-{
- u16 cider;
-
- /*
- * Read CIDER register first, however read it the "wrong" way around.
- * If the endian strap on the KS8851-16MLL in incorrect and the chip
- * is operating in different endianness than the CPU, then the meaning
- * of BE[3:0] byte-enable bits is also swapped such that:
- * BE[3,2,1,0] becomes BE[1,0,3,2]
- *
- * Luckily for us, the byte-enable bits are the top four MSbits of
- * the address register and the CIDER register is at offset 0xc0.
- * Hence, by reading address 0xc0c0, which is not impacted by endian
- * swapping, we assert either BE[3:2] or BE[1:0] while reading the
- * CIDER register.
- *
- * If the bus configuration is correct, reading 0xc0c0 asserts
- * BE[3:2] and this read returns 0x0000, because to read register
- * with bottom two LSbits of address set to 0, BE[1:0] must be
- * asserted.
- *
- * If the bus configuration is NOT correct, reading 0xc0c0 asserts
- * BE[1:0] and this read returns non-zero 0x8872 value.
- */
- iowrite16(BE3 | BE2 | KS_CIDER, ks->hw_addr_cmd);
- cider = ioread16(ks->hw_addr);
- if (!cider)
- return 0;
-
- netdev_err(ks->netdev, "incorrect EESK endian strap setting\n");
-
- return -EINVAL;
-}
-
-/**
- * ks_rdreg16 - read 16 bit register from device
- * @ks : The chip information
- * @offset: The register address
- *
- * Read a 16bit register from the chip, returning the result
- */
-
-static u16 ks_rdreg16(struct ks_net *ks, int offset)
-{
- ks->cmd_reg_cache = (u16)offset | ((BE1 | BE0) << (offset & 0x02));
- iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd);
- return ioread16(ks->hw_addr);
-}
-
-/**
- * ks_wrreg16 - write 16bit register value to chip
- * @ks: The chip information
- * @offset: The register address
- * @value: The value to write
- *
- */
-
-static void ks_wrreg16(struct ks_net *ks, int offset, u16 value)
-{
- ks->cmd_reg_cache = (u16)offset | ((BE1 | BE0) << (offset & 0x02));
- iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd);
- iowrite16(value, ks->hw_addr);
-}
-
-/**
- * ks_inblk - read a block of data from QMU. This is called after sudo DMA mode enabled.
- * @ks: The chip state
- * @wptr: buffer address to save data
- * @len: length in byte to read
- *
- */
-static inline void ks_inblk(struct ks_net *ks, u16 *wptr, u32 len)
-{
- len >>= 1;
- while (len--)
- *wptr++ = (u16)ioread16(ks->hw_addr);
-}
-
-/**
- * ks_outblk - write data to QMU. This is called after sudo DMA mode enabled.
- * @ks: The chip information
- * @wptr: buffer address
- * @len: length in byte to write
- *
- */
-static inline void ks_outblk(struct ks_net *ks, u16 *wptr, u32 len)
-{
- len >>= 1;
- while (len--)
- iowrite16(*wptr++, ks->hw_addr);
-}
-
-static void ks_disable_int(struct ks_net *ks)
-{
- ks_wrreg16(ks, KS_IER, 0x0000);
-} /* ks_disable_int */
-
-static void ks_enable_int(struct ks_net *ks)
-{
- ks_wrreg16(ks, KS_IER, ks->rc_ier);
-} /* ks_enable_int */
-
-/**
- * ks_tx_fifo_space - return the available hardware buffer size.
- * @ks: The chip information
- *
- */
-static inline u16 ks_tx_fifo_space(struct ks_net *ks)
-{
- return ks_rdreg16(ks, KS_TXMIR) & 0x1fff;
-}
-
-/**
- * ks_save_cmd_reg - save the command register from the cache.
- * @ks: The chip information
- *
- */
-static inline void ks_save_cmd_reg(struct ks_net *ks)
-{
- /*ks8851 MLL has a bug to read back the command register.
- * So rely on software to save the content of command register.
- */
- ks->cmd_reg_cache_int = ks->cmd_reg_cache;
-}
-
-/**
- * ks_restore_cmd_reg - restore the command register from the cache and
- * write to hardware register.
- * @ks: The chip information
- *
- */
-static inline void ks_restore_cmd_reg(struct ks_net *ks)
-{
- ks->cmd_reg_cache = ks->cmd_reg_cache_int;
- iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd);
-}
-
-/**
- * ks_set_powermode - set power mode of the device
- * @ks: The chip information
- * @pwrmode: The power mode value to write to KS_PMECR.
- *
- * Change the power mode of the chip.
- */
-static void ks_set_powermode(struct ks_net *ks, unsigned pwrmode)
-{
- unsigned pmecr;
-
- netif_dbg(ks, hw, ks->netdev, "setting power mode %d\n", pwrmode);
-
- ks_rdreg16(ks, KS_GRR);
- pmecr = ks_rdreg16(ks, KS_PMECR);
- pmecr &= ~PMECR_PM_MASK;
- pmecr |= pwrmode;
-
- ks_wrreg16(ks, KS_PMECR, pmecr);
-}
-
-/**
- * ks_read_config - read chip configuration of bus width.
- * @ks: The chip information
- *
- */
-static void ks_read_config(struct ks_net *ks)
-{
- u16 reg_data = 0;
-
- /* Regardless of bus width, 8 bit read should always work.*/
- reg_data = ks_rdreg16(ks, KS_CCR);
-
- /* addr/data bus are multiplexed */
- ks->sharedbus = (reg_data & CCR_SHARED) == CCR_SHARED;
-
- /* There are garbage data when reading data from QMU,
- depending on bus-width.
- */
-
- if (reg_data & CCR_8BIT) {
- ks->bus_width = ENUM_BUS_8BIT;
- ks->extra_byte = 1;
- } else if (reg_data & CCR_16BIT) {
- ks->bus_width = ENUM_BUS_16BIT;
- ks->extra_byte = 2;
- } else {
- ks->bus_width = ENUM_BUS_32BIT;
- ks->extra_byte = 4;
- }
-}
-
-/**
- * ks_soft_reset - issue one of the soft reset to the device
- * @ks: The device state.
- * @op: The bit(s) to set in the GRR
- *
- * Issue the relevant soft-reset command to the device's GRR register
- * specified by @op.
- *
- * Note, the delays are in there as a caution to ensure that the reset
- * has time to take effect and then complete. Since the datasheet does
- * not currently specify the exact sequence, we have chosen something
- * that seems to work with our device.
- */
-static void ks_soft_reset(struct ks_net *ks, unsigned op)
-{
- /* Disable interrupt first */
- ks_wrreg16(ks, KS_IER, 0x0000);
- ks_wrreg16(ks, KS_GRR, op);
- mdelay(10); /* wait a short time to effect reset */
- ks_wrreg16(ks, KS_GRR, 0);
- mdelay(1); /* wait for condition to clear */
-}
-
-
-static void ks_enable_qmu(struct ks_net *ks)
-{
- u16 w;
-
- w = ks_rdreg16(ks, KS_TXCR);
- /* Enables QMU Transmit (TXCR). */
- ks_wrreg16(ks, KS_TXCR, w | TXCR_TXE);
-
- /*
- * RX Frame Count Threshold Enable and Auto-Dequeue RXQ Frame
- * Enable
- */
-
- w = ks_rdreg16(ks, KS_RXQCR);
- ks_wrreg16(ks, KS_RXQCR, w | RXQCR_RXFCTE);
-
- /* Enables QMU Receive (RXCR1). */
- w = ks_rdreg16(ks, KS_RXCR1);
- ks_wrreg16(ks, KS_RXCR1, w | RXCR1_RXE);
- ks->enabled = true;
-} /* ks_enable_qmu */
-
-static void ks_disable_qmu(struct ks_net *ks)
-{
- u16 w;
-
- w = ks_rdreg16(ks, KS_TXCR);
-
- /* Disables QMU Transmit (TXCR). */
- w &= ~TXCR_TXE;
- ks_wrreg16(ks, KS_TXCR, w);
-
- /* Disables QMU Receive (RXCR1). */
- w = ks_rdreg16(ks, KS_RXCR1);
- w &= ~RXCR1_RXE ;
- ks_wrreg16(ks, KS_RXCR1, w);
-
- ks->enabled = false;
-
-} /* ks_disable_qmu */
-
-/**
- * ks_read_qmu - read 1 pkt data from the QMU.
- * @ks: The chip information
- * @buf: buffer address to save 1 pkt
- * @len: Pkt length
- * Here is the sequence to read 1 pkt:
- * 1. set sudo DMA mode
- * 2. read prepend data
- * 3. read pkt data
- * 4. reset sudo DMA Mode
- */
-static inline void ks_read_qmu(struct ks_net *ks, u16 *buf, u32 len)
-{
- u32 r = ks->extra_byte & 0x1 ;
- u32 w = ks->extra_byte - r;
-
- /* 1. set sudo DMA mode */
- ks_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI);
- ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA);
-
- /* 2. read prepend data */
- /**
- * read 4 + extra bytes and discard them.
- * extra bytes for dummy, 2 for status, 2 for len
- */
-
- /* use likely(r) for 8 bit access for performance */
- if (unlikely(r))
- ioread8(ks->hw_addr);
- ks_inblk(ks, buf, w + 2 + 2);
-
- /* 3. read pkt data */
- ks_inblk(ks, buf, ALIGN(len, 4));
-
- /* 4. reset sudo DMA Mode */
- ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr);
-}
-
-/**
- * ks_rcv - read multiple pkts data from the QMU.
- * @ks: The chip information
- * @netdev: The network device being opened.
- *
- * Read all of header information before reading pkt content.
- * It is not allowed only port of pkts in QMU after issuing
- * interrupt ack.
- */
-static void ks_rcv(struct ks_net *ks, struct net_device *netdev)
-{
- u32 i;
- struct type_frame_head *frame_hdr = ks->frame_head_info;
- struct sk_buff *skb;
-
- ks->frame_cnt = ks_rdreg16(ks, KS_RXFCTR) >> 8;
-
- /* read all header information */
- for (i = 0; i < ks->frame_cnt; i++) {
- /* Checking Received packet status */
- frame_hdr->sts = ks_rdreg16(ks, KS_RXFHSR);
- /* Get packet len from hardware */
- frame_hdr->len = ks_rdreg16(ks, KS_RXFHBCR);
- frame_hdr++;
- }
-
- frame_hdr = ks->frame_head_info;
- while (ks->frame_cnt--) {
- if (unlikely(!(frame_hdr->sts & RXFSHR_RXFV) ||
- frame_hdr->len >= RX_BUF_SIZE ||
- frame_hdr->len <= 0)) {
-
- /* discard an invalid packet */
- ks_wrreg16(ks, KS_RXQCR, (ks->rc_rxqcr | RXQCR_RRXEF));
- netdev->stats.rx_dropped++;
- if (!(frame_hdr->sts & RXFSHR_RXFV))
- netdev->stats.rx_frame_errors++;
- else
- netdev->stats.rx_length_errors++;
- frame_hdr++;
- continue;
- }
-
- skb = netdev_alloc_skb(netdev, frame_hdr->len + 16);
- if (likely(skb)) {
- skb_reserve(skb, 2);
- /* read data block including CRC 4 bytes */
- ks_read_qmu(ks, (u16 *)skb->data, frame_hdr->len);
- skb_put(skb, frame_hdr->len - 4);
- skb->protocol = eth_type_trans(skb, netdev);
- netif_rx(skb);
- /* exclude CRC size */
- netdev->stats.rx_bytes += frame_hdr->len - 4;
- netdev->stats.rx_packets++;
- } else {
- ks_wrreg16(ks, KS_RXQCR, (ks->rc_rxqcr | RXQCR_RRXEF));
- netdev->stats.rx_dropped++;
- }
- frame_hdr++;
- }
-}
-
-/**
- * ks_update_link_status - link status update.
- * @netdev: The network device being opened.
- * @ks: The chip information
- *
- */
-
-static void ks_update_link_status(struct net_device *netdev, struct ks_net *ks)
-{
- /* check the status of the link */
- u32 link_up_status;
- if (ks_rdreg16(ks, KS_P1SR) & P1SR_LINK_GOOD) {
- netif_carrier_on(netdev);
- link_up_status = true;
- } else {
- netif_carrier_off(netdev);
- link_up_status = false;
- }
- netif_dbg(ks, link, ks->netdev,
- "%s: %s\n", __func__, link_up_status ? "UP" : "DOWN");
-}
-
-/**
- * ks_irq - device interrupt handler
- * @irq: Interrupt number passed from the IRQ handler.
- * @pw: The private word passed to register_irq(), our struct ks_net.
- *
- * This is the handler invoked to find out what happened
- *
- * Read the interrupt status, work out what needs to be done and then clear
- * any of the interrupts that are not needed.
- */
-
-static irqreturn_t ks_irq(int irq, void *pw)
-{
- struct net_device *netdev = pw;
- struct ks_net *ks = netdev_priv(netdev);
- unsigned long flags;
- u16 status;
-
- spin_lock_irqsave(&ks->statelock, flags);
- /*this should be the first in IRQ handler */
- ks_save_cmd_reg(ks);
-
- status = ks_rdreg16(ks, KS_ISR);
- if (unlikely(!status)) {
- ks_restore_cmd_reg(ks);
- spin_unlock_irqrestore(&ks->statelock, flags);
- return IRQ_NONE;
- }
-
- ks_wrreg16(ks, KS_ISR, status);
-
- if (likely(status & IRQ_RXI))
- ks_rcv(ks, netdev);
-
- if (unlikely(status & IRQ_LCI))
- ks_update_link_status(netdev, ks);
-
- if (unlikely(status & IRQ_TXI))
- netif_wake_queue(netdev);
-
- if (unlikely(status & IRQ_LDI)) {
-
- u16 pmecr = ks_rdreg16(ks, KS_PMECR);
- pmecr &= ~PMECR_WKEVT_MASK;
- ks_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK);
- }
-
- if (unlikely(status & IRQ_RXOI))
- ks->netdev->stats.rx_over_errors++;
- /* this should be the last in IRQ handler*/
- ks_restore_cmd_reg(ks);
- spin_unlock_irqrestore(&ks->statelock, flags);
- return IRQ_HANDLED;
-}
-
-
-/**
- * ks_net_open - open network device
- * @netdev: The network device being opened.
- *
- * Called when the network device is marked active, such as a user executing
- * 'ifconfig up' on the device.
- */
-static int ks_net_open(struct net_device *netdev)
-{
- struct ks_net *ks = netdev_priv(netdev);
- int err;
-
-#define KS_INT_FLAGS IRQF_TRIGGER_LOW
- /* lock the card, even if we may not actually do anything
- * else at the moment.
- */
-
- netif_dbg(ks, ifup, ks->netdev, "%s - entry\n", __func__);
-
- /* reset the HW */
- err = request_irq(netdev->irq, ks_irq, KS_INT_FLAGS, DRV_NAME, netdev);
-
- if (err) {
- pr_err("Failed to request IRQ: %d: %d\n", netdev->irq, err);
- return err;
- }
-
- /* wake up powermode to normal mode */
- ks_set_powermode(ks, PMECR_PM_NORMAL);
- mdelay(1); /* wait for normal mode to take effect */
-
- ks_wrreg16(ks, KS_ISR, 0xffff);
- ks_enable_int(ks);
- ks_enable_qmu(ks);
- netif_start_queue(ks->netdev);
-
- netif_dbg(ks, ifup, ks->netdev, "network device up\n");
-
- return 0;
-}
-
-/**
- * ks_net_stop - close network device
- * @netdev: 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 ks_net_stop(struct net_device *netdev)
-{
- struct ks_net *ks = netdev_priv(netdev);
-
- netif_info(ks, ifdown, netdev, "shutting down\n");
-
- netif_stop_queue(netdev);
-
- mutex_lock(&ks->lock);
-
- /* turn off the IRQs and ack any outstanding */
- ks_wrreg16(ks, KS_IER, 0x0000);
- ks_wrreg16(ks, KS_ISR, 0xffff);
-
- /* shutdown RX/TX QMU */
- ks_disable_qmu(ks);
- ks_disable_int(ks);
-
- /* set powermode to soft power down to save power */
- ks_set_powermode(ks, PMECR_PM_SOFTDOWN);
- free_irq(netdev->irq, netdev);
- mutex_unlock(&ks->lock);
- return 0;
-}
-
-
-/**
- * ks_write_qmu - write 1 pkt data to the QMU.
- * @ks: The chip information
- * @pdata: buffer address to save 1 pkt
- * @len: Pkt length in byte
- * Here is the sequence to write 1 pkt:
- * 1. set sudo DMA mode
- * 2. write status/length
- * 3. write pkt data
- * 4. reset sudo DMA Mode
- * 5. reset sudo DMA mode
- * 6. Wait until pkt is out
- */
-static void ks_write_qmu(struct ks_net *ks, u8 *pdata, u16 len)
-{
- /* start header at txb[0] to align txw entries */
- ks->txh.txw[0] = 0;
- ks->txh.txw[1] = cpu_to_le16(len);
-
- /* 1. set sudo-DMA mode */
- ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA);
- /* 2. write status/lenth info */
- ks_outblk(ks, ks->txh.txw, 4);
- /* 3. write pkt data */
- ks_outblk(ks, (u16 *)pdata, ALIGN(len, 4));
- /* 4. reset sudo-DMA mode */
- ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr);
- /* 5. Enqueue Tx(move the pkt from TX buffer into TXQ) */
- ks_wrreg16(ks, KS_TXQCR, TXQCR_METFE);
- /* 6. wait until TXQCR_METFE is auto-cleared */
- while (ks_rdreg16(ks, KS_TXQCR) & TXQCR_METFE)
- ;
-}
-
-/**
- * ks_start_xmit - transmit packet
- * @skb : The buffer to transmit
- * @netdev : The device used to transmit the packet.
- *
- * Called by the network layer to transmit the @skb.
- * spin_lock_irqsave is required because tx and rx should be mutual exclusive.
- * So while tx is in-progress, prevent IRQ interrupt from happenning.
- */
-static netdev_tx_t ks_start_xmit(struct sk_buff *skb, struct net_device *netdev)
-{
- netdev_tx_t retv = NETDEV_TX_OK;
- struct ks_net *ks = netdev_priv(netdev);
- unsigned long flags;
-
- spin_lock_irqsave(&ks->statelock, flags);
-
- /* Extra space are required:
- * 4 byte for alignment, 4 for status/length, 4 for CRC
- */
-
- if (likely(ks_tx_fifo_space(ks) >= skb->len + 12)) {
- ks_write_qmu(ks, skb->data, skb->len);
- /* add tx statistics */
- netdev->stats.tx_bytes += skb->len;
- netdev->stats.tx_packets++;
- dev_kfree_skb(skb);
- } else
- retv = NETDEV_TX_BUSY;
- spin_unlock_irqrestore(&ks->statelock, flags);
- return retv;
-}
-
-/**
- * ks_start_rx - ready to serve pkts
- * @ks : The chip information
- *
- */
-static void ks_start_rx(struct ks_net *ks)
-{
- u16 cntl;
-
- /* Enables QMU Receive (RXCR1). */
- cntl = ks_rdreg16(ks, KS_RXCR1);
- cntl |= RXCR1_RXE ;
- ks_wrreg16(ks, KS_RXCR1, cntl);
-} /* ks_start_rx */
-
-/**
- * ks_stop_rx - stop to serve pkts
- * @ks : The chip information
- *
- */
-static void ks_stop_rx(struct ks_net *ks)
-{
- u16 cntl;
-
- /* Disables QMU Receive (RXCR1). */
- cntl = ks_rdreg16(ks, KS_RXCR1);
- cntl &= ~RXCR1_RXE ;
- ks_wrreg16(ks, KS_RXCR1, cntl);
-
-} /* ks_stop_rx */
-
-static unsigned long const ethernet_polynomial = CRC32_POLY_BE;
-
-static unsigned long ether_gen_crc(int length, u8 *data)
-{
- long crc = -1;
- while (--length >= 0) {
- u8 current_octet = *data++;
- int bit;
-
- for (bit = 0; bit < 8; bit++, current_octet >>= 1) {
- crc = (crc << 1) ^
- ((crc < 0) ^ (current_octet & 1) ?
- ethernet_polynomial : 0);
- }
- }
- return (unsigned long)crc;
-} /* ether_gen_crc */
-
-/**
-* ks_set_grpaddr - set multicast information
-* @ks : The chip information
-*/
-
-static void ks_set_grpaddr(struct ks_net *ks)
-{
- u8 i;
- u32 index, position, value;
-
- memset(ks->mcast_bits, 0, sizeof(u8) * HW_MCAST_SIZE);
-
- for (i = 0; i < ks->mcast_lst_size; i++) {
- position = (ether_gen_crc(6, ks->mcast_lst[i]) >> 26) & 0x3f;
- index = position >> 3;
- value = 1 << (position & 7);
- ks->mcast_bits[index] |= (u8)value;
- }
-
- for (i = 0; i < HW_MCAST_SIZE; i++) {
- if (i & 1) {
- ks_wrreg16(ks, (u16)((KS_MAHTR0 + i) & ~1),
- (ks->mcast_bits[i] << 8) |
- ks->mcast_bits[i - 1]);
- }
- }
-} /* ks_set_grpaddr */
-
-/**
-* ks_clear_mcast - clear multicast information
-*
-* @ks : The chip information
-* This routine removes all mcast addresses set in the hardware.
-*/
-
-static void ks_clear_mcast(struct ks_net *ks)
-{
- u16 i, mcast_size;
- for (i = 0; i < HW_MCAST_SIZE; i++)
- ks->mcast_bits[i] = 0;
-
- mcast_size = HW_MCAST_SIZE >> 2;
- for (i = 0; i < mcast_size; i++)
- ks_wrreg16(ks, KS_MAHTR0 + (2*i), 0);
-}
-
-static void ks_set_promis(struct ks_net *ks, u16 promiscuous_mode)
-{
- u16 cntl;
- ks->promiscuous = promiscuous_mode;
- ks_stop_rx(ks); /* Stop receiving for reconfiguration */
- cntl = ks_rdreg16(ks, KS_RXCR1);
-
- cntl &= ~RXCR1_FILTER_MASK;
- if (promiscuous_mode)
- /* Enable Promiscuous mode */
- cntl |= RXCR1_RXAE | RXCR1_RXINVF;
- else
- /* Disable Promiscuous mode (default normal mode) */
- cntl |= RXCR1_RXPAFMA;
-
- ks_wrreg16(ks, KS_RXCR1, cntl);
-
- if (ks->enabled)
- ks_start_rx(ks);
-
-} /* ks_set_promis */
-
-static void ks_set_mcast(struct ks_net *ks, u16 mcast)
-{
- u16 cntl;
-
- ks->all_mcast = mcast;
- ks_stop_rx(ks); /* Stop receiving for reconfiguration */
- cntl = ks_rdreg16(ks, KS_RXCR1);
- cntl &= ~RXCR1_FILTER_MASK;
- if (mcast)
- /* Enable "Perfect with Multicast address passed mode" */
- cntl |= (RXCR1_RXAE | RXCR1_RXMAFMA | RXCR1_RXPAFMA);
- else
- /**
- * Disable "Perfect with Multicast address passed
- * mode" (normal mode).
- */
- cntl |= RXCR1_RXPAFMA;
-
- ks_wrreg16(ks, KS_RXCR1, cntl);
-
- if (ks->enabled)
- ks_start_rx(ks);
-} /* ks_set_mcast */
-
-static void ks_set_rx_mode(struct net_device *netdev)
-{
- struct ks_net *ks = netdev_priv(netdev);
- struct netdev_hw_addr *ha;
-
- /* Turn on/off promiscuous mode. */
- if ((netdev->flags & IFF_PROMISC) == IFF_PROMISC)
- ks_set_promis(ks,
- (u16)((netdev->flags & IFF_PROMISC) == IFF_PROMISC));
- /* Turn on/off all mcast mode. */
- else if ((netdev->flags & IFF_ALLMULTI) == IFF_ALLMULTI)
- ks_set_mcast(ks,
- (u16)((netdev->flags & IFF_ALLMULTI) == IFF_ALLMULTI));
- else
- ks_set_promis(ks, false);
-
- if ((netdev->flags & IFF_MULTICAST) && netdev_mc_count(netdev)) {
- if (netdev_mc_count(netdev) <= MAX_MCAST_LST) {
- int i = 0;
-
- netdev_for_each_mc_addr(ha, netdev) {
- if (i >= MAX_MCAST_LST)
- break;
- memcpy(ks->mcast_lst[i++], ha->addr, ETH_ALEN);
- }
- ks->mcast_lst_size = (u8)i;
- ks_set_grpaddr(ks);
- } else {
- /**
- * List too big to support so
- * turn on all mcast mode.
- */
- ks->mcast_lst_size = MAX_MCAST_LST;
- ks_set_mcast(ks, true);
- }
- } else {
- ks->mcast_lst_size = 0;
- ks_clear_mcast(ks);
- }
-} /* ks_set_rx_mode */
-
-static void ks_set_mac(struct ks_net *ks, u8 *data)
-{
- u16 *pw = (u16 *)data;
- u16 w, u;
-
- ks_stop_rx(ks); /* Stop receiving for reconfiguration */
-
- u = *pw++;
- w = ((u & 0xFF) << 8) | ((u >> 8) & 0xFF);
- ks_wrreg16(ks, KS_MARH, w);
-
- u = *pw++;
- w = ((u & 0xFF) << 8) | ((u >> 8) & 0xFF);
- ks_wrreg16(ks, KS_MARM, w);
-
- u = *pw;
- w = ((u & 0xFF) << 8) | ((u >> 8) & 0xFF);
- ks_wrreg16(ks, KS_MARL, w);
-
- memcpy(ks->mac_addr, data, ETH_ALEN);
-
- if (ks->enabled)
- ks_start_rx(ks);
-}
-
-static int ks_set_mac_address(struct net_device *netdev, void *paddr)
-{
- struct ks_net *ks = netdev_priv(netdev);
- struct sockaddr *addr = paddr;
- u8 *da;
-
- memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
-
- da = (u8 *)netdev->dev_addr;
-
- ks_set_mac(ks, da);
- return 0;
-}
-
-static int ks_net_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
-{
- struct ks_net *ks = netdev_priv(netdev);
-
- if (!netif_running(netdev))
- return -EINVAL;
-
- return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL);
-}
-
-static const struct net_device_ops ks_netdev_ops = {
- .ndo_open = ks_net_open,
- .ndo_stop = ks_net_stop,
- .ndo_do_ioctl = ks_net_ioctl,
- .ndo_start_xmit = ks_start_xmit,
- .ndo_set_mac_address = ks_set_mac_address,
- .ndo_set_rx_mode = ks_set_rx_mode,
- .ndo_validate_addr = eth_validate_addr,
-};
-
-/* ethtool support */
-
-static void ks_get_drvinfo(struct net_device *netdev,
- struct ethtool_drvinfo *di)
-{
- strlcpy(di->driver, DRV_NAME, sizeof(di->driver));
- strlcpy(di->version, "1.00", sizeof(di->version));
- strlcpy(di->bus_info, dev_name(netdev->dev.parent),
- sizeof(di->bus_info));
-}
-
-static u32 ks_get_msglevel(struct net_device *netdev)
-{
- struct ks_net *ks = netdev_priv(netdev);
- return ks->msg_enable;
-}
-
-static void ks_set_msglevel(struct net_device *netdev, u32 to)
-{
- struct ks_net *ks = netdev_priv(netdev);
- ks->msg_enable = to;
-}
-
-static int ks_get_link_ksettings(struct net_device *netdev,
- struct ethtool_link_ksettings *cmd)
-{
- struct ks_net *ks = netdev_priv(netdev);
-
- mii_ethtool_get_link_ksettings(&ks->mii, cmd);
-
- return 0;
-}
-
-static int ks_set_link_ksettings(struct net_device *netdev,
- const struct ethtool_link_ksettings *cmd)
-{
- struct ks_net *ks = netdev_priv(netdev);
- return mii_ethtool_set_link_ksettings(&ks->mii, cmd);
-}
-
-static u32 ks_get_link(struct net_device *netdev)
-{
- struct ks_net *ks = netdev_priv(netdev);
- return mii_link_ok(&ks->mii);
-}
-
-static int ks_nway_reset(struct net_device *netdev)
-{
- struct ks_net *ks = netdev_priv(netdev);
- return mii_nway_restart(&ks->mii);
-}
-
-static const struct ethtool_ops ks_ethtool_ops = {
- .get_drvinfo = ks_get_drvinfo,
- .get_msglevel = ks_get_msglevel,
- .set_msglevel = ks_set_msglevel,
- .get_link = ks_get_link,
- .nway_reset = ks_nway_reset,
- .get_link_ksettings = ks_get_link_ksettings,
- .set_link_ksettings = ks_set_link_ksettings,
-};
-
-/* MII interface controls */
-
-/**
- * ks_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 ks_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 0x0;
-}
-
-/**
- * ks_phy_read - MII interface PHY register read.
- * @netdev: 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 ks_phy_read(struct net_device *netdev, int phy_addr, int reg)
-{
- struct ks_net *ks = netdev_priv(netdev);
- int ksreg;
- int result;
-
- ksreg = ks_phy_reg(reg);
- if (!ksreg)
- return 0x0; /* no error return allowed, so use zero */
-
- mutex_lock(&ks->lock);
- result = ks_rdreg16(ks, ksreg);
- mutex_unlock(&ks->lock);
-
- return result;
-}
-
-static void ks_phy_write(struct net_device *netdev,
- int phy, int reg, int value)
-{
- struct ks_net *ks = netdev_priv(netdev);
- int ksreg;
-
- ksreg = ks_phy_reg(reg);
- if (ksreg) {
- mutex_lock(&ks->lock);
- ks_wrreg16(ks, ksreg, value);
- mutex_unlock(&ks->lock);
- }
-}
-
-/**
- * ks_read_selftest - read the selftest memory info.
- * @ks: The device state
- *
- * Read and check the TX/RX memory selftest information.
- */
-static int ks_read_selftest(struct ks_net *ks)
-{
- unsigned both_done = MBIR_TXMBF | MBIR_RXMBF;
- int ret = 0;
- unsigned rd;
-
- rd = ks_rdreg16(ks, KS_MBIR);
-
- if ((rd & both_done) != both_done) {
- netdev_warn(ks->netdev, "Memory selftest not finished\n");
- return 0;
- }
-
- if (rd & MBIR_TXMBFA) {
- netdev_err(ks->netdev, "TX memory selftest fails\n");
- ret |= 1;
- }
-
- if (rd & MBIR_RXMBFA) {
- netdev_err(ks->netdev, "RX memory selftest fails\n");
- ret |= 2;
- }
-
- netdev_info(ks->netdev, "the selftest passes\n");
- return ret;
-}
-
-static void ks_setup(struct ks_net *ks)
-{
- u16 w;
-
- /**
- * Configure QMU Transmit
- */
-
- /* Setup Transmit Frame Data Pointer Auto-Increment (TXFDPR) */
- ks_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI);
-
- /* Setup Receive Frame Data Pointer Auto-Increment */
- ks_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI);
-
- /* Setup Receive Frame Threshold - 1 frame (RXFCTFC) */
- ks_wrreg16(ks, KS_RXFCTR, 1 & RXFCTR_RXFCT_MASK);
-
- /* Setup RxQ Command Control (RXQCR) */
- ks->rc_rxqcr = RXQCR_CMD_CNTL;
- ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr);
-
- /**
- * set the force mode to half duplex, default is full duplex
- * because if the auto-negotiation fails, most switch uses
- * half-duplex.
- */
-
- w = ks_rdreg16(ks, KS_P1MBCR);
- w &= ~BMCR_FULLDPLX;
- ks_wrreg16(ks, KS_P1MBCR, w);
-
- w = TXCR_TXFCE | TXCR_TXPE | TXCR_TXCRC | TXCR_TCGIP;
- ks_wrreg16(ks, KS_TXCR, w);
-
- w = RXCR1_RXFCE | RXCR1_RXBE | RXCR1_RXUE | RXCR1_RXME | RXCR1_RXIPFCC;
-
- if (ks->promiscuous) /* bPromiscuous */
- w |= (RXCR1_RXAE | RXCR1_RXINVF);
- else if (ks->all_mcast) /* Multicast address passed mode */
- w |= (RXCR1_RXAE | RXCR1_RXMAFMA | RXCR1_RXPAFMA);
- else /* Normal mode */
- w |= RXCR1_RXPAFMA;
-
- ks_wrreg16(ks, KS_RXCR1, w);
-} /*ks_setup */
-
-
-static void ks_setup_int(struct ks_net *ks)
-{
- ks->rc_ier = 0x00;
- /* Clear the interrupts status of the hardware. */
- ks_wrreg16(ks, KS_ISR, 0xffff);
-
- /* Enables the interrupts of the hardware. */
- ks->rc_ier = (IRQ_LCI | IRQ_TXI | IRQ_RXI);
-} /* ks_setup_int */
-
-static int ks_hw_init(struct ks_net *ks)
-{
-#define MHEADER_SIZE (sizeof(struct type_frame_head) * MAX_RECV_FRAMES)
- ks->promiscuous = 0;
- ks->all_mcast = 0;
- ks->mcast_lst_size = 0;
-
- ks->frame_head_info = devm_kmalloc(&ks->pdev->dev, MHEADER_SIZE,
- GFP_KERNEL);
- if (!ks->frame_head_info)
- return false;
-
- ks_set_mac(ks, KS_DEFAULT_MAC_ADDRESS);
- return true;
-}
-
-#if defined(CONFIG_OF)
-static const struct of_device_id ks8851_ml_dt_ids[] = {
- { .compatible = "micrel,ks8851-mll" },
- { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, ks8851_ml_dt_ids);
-#endif
-
-static int ks8851_probe(struct platform_device *pdev)
-{
- int err;
- struct net_device *netdev;
- struct ks_net *ks;
- u16 id, data;
- const char *mac;
-
- netdev = alloc_etherdev(sizeof(struct ks_net));
- if (!netdev)
- return -ENOMEM;
-
- SET_NETDEV_DEV(netdev, &pdev->dev);
-
- ks = netdev_priv(netdev);
- ks->netdev = netdev;
-
- ks->hw_addr = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(ks->hw_addr)) {
- err = PTR_ERR(ks->hw_addr);
- goto err_free;
- }
-
- ks->hw_addr_cmd = devm_platform_ioremap_resource(pdev, 1);
- if (IS_ERR(ks->hw_addr_cmd)) {
- err = PTR_ERR(ks->hw_addr_cmd);
- goto err_free;
- }
-
- err = ks_check_endian(ks);
- if (err)
- goto err_free;
-
- netdev->irq = platform_get_irq(pdev, 0);
-
- if ((int)netdev->irq < 0) {
- err = netdev->irq;
- goto err_free;
- }
-
- ks->pdev = pdev;
-
- mutex_init(&ks->lock);
- spin_lock_init(&ks->statelock);
-
- netdev->netdev_ops = &ks_netdev_ops;
- netdev->ethtool_ops = &ks_ethtool_ops;
-
- /* 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 = ks_phy_read;
- ks->mii.mdio_write = ks_phy_write;
-
- netdev_info(netdev, "message enable is %d\n", msg_enable);
- /* set the default message enable */
- ks->msg_enable = netif_msg_init(msg_enable, (NETIF_MSG_DRV |
- NETIF_MSG_PROBE |
- NETIF_MSG_LINK));
- ks_read_config(ks);
-
- /* simple check for a valid chip being connected to the bus */
- if ((ks_rdreg16(ks, KS_CIDER) & ~CIDER_REV_MASK) != CIDER_ID) {
- netdev_err(netdev, "failed to read device ID\n");
- err = -ENODEV;
- goto err_free;
- }
-
- if (ks_read_selftest(ks)) {
- netdev_err(netdev, "failed to read device ID\n");
- err = -ENODEV;
- goto err_free;
- }
-
- err = register_netdev(netdev);
- if (err)
- goto err_free;
-
- platform_set_drvdata(pdev, netdev);
-
- ks_soft_reset(ks, GRR_GSR);
- ks_hw_init(ks);
- ks_disable_qmu(ks);
- ks_setup(ks);
- ks_setup_int(ks);
-
- data = ks_rdreg16(ks, KS_OBCR);
- ks_wrreg16(ks, KS_OBCR, data | OBCR_ODS_16mA);
-
- /* overwriting the default MAC address */
- if (pdev->dev.of_node) {
- mac = of_get_mac_address(pdev->dev.of_node);
- if (!IS_ERR(mac))
- ether_addr_copy(ks->mac_addr, mac);
- } else {
- struct ks8851_mll_platform_data *pdata;
-
- pdata = dev_get_platdata(&pdev->dev);
- if (!pdata) {
- netdev_err(netdev, "No platform data\n");
- err = -ENODEV;
- goto err_pdata;
- }
- memcpy(ks->mac_addr, pdata->mac_addr, ETH_ALEN);
- }
- if (!is_valid_ether_addr(ks->mac_addr)) {
- /* Use random MAC address if none passed */
- eth_random_addr(ks->mac_addr);
- netdev_info(netdev, "Using random mac address\n");
- }
- netdev_info(netdev, "Mac address is: %pM\n", ks->mac_addr);
-
- memcpy(netdev->dev_addr, ks->mac_addr, ETH_ALEN);
-
- ks_set_mac(ks, netdev->dev_addr);
-
- id = ks_rdreg16(ks, KS_CIDER);
-
- netdev_info(netdev, "Found chip, family: 0x%x, id: 0x%x, rev: 0x%x\n",
- (id >> 8) & 0xff, (id >> 4) & 0xf, (id >> 1) & 0x7);
- return 0;
-
-err_pdata:
- unregister_netdev(netdev);
-err_free:
- free_netdev(netdev);
- return err;
-}
-
-static int ks8851_remove(struct platform_device *pdev)
-{
- struct net_device *netdev = platform_get_drvdata(pdev);
-
- unregister_netdev(netdev);
- free_netdev(netdev);
- return 0;
-
-}
-
-static struct platform_driver ks8851_platform_driver = {
- .driver = {
- .name = DRV_NAME,
- .of_match_table = of_match_ptr(ks8851_ml_dt_ids),
- },
- .probe = ks8851_probe,
- .remove = ks8851_remove,
-};
-
-module_platform_driver(ks8851_platform_driver);
-
-MODULE_DESCRIPTION("KS8851 MLL Network driver");
-MODULE_AUTHOR("David Choi <david.choi@micrel.com>");
-MODULE_LICENSE("GPL");
-module_param_named(message, msg_enable, int, 0);
-MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)");
-
projects / platform / kernel / linux-starfive.git / commitdiff