// SPDX-License-Identifier: GPL-2.0-only
|
/*
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* Copyright (C) 2008-2010
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*
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* - Kurt Van Dijck, EIA Electronics
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*/
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <asm/io.h>
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#include "softing.h"
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#define TX_ECHO_SKB_MAX (((TXMAX+1)/2)-1)
|
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/*
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* test is a specific CAN netdev
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* is online (ie. up 'n running, not sleeping, not busoff
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*/
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static inline int canif_is_active(struct net_device *netdev)
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{
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struct can_priv *can = netdev_priv(netdev);
|
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if (!netif_running(netdev))
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return 0;
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return (can->state <= CAN_STATE_ERROR_PASSIVE);
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}
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/* reset DPRAM */
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static inline void softing_set_reset_dpram(struct softing *card)
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{
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if (card->pdat->generation >= 2) {
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spin_lock_bh(&card->spin);
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iowrite8(ioread8(&card->dpram[DPRAM_V2_RESET]) & ~1,
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&card->dpram[DPRAM_V2_RESET]);
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spin_unlock_bh(&card->spin);
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}
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}
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static inline void softing_clr_reset_dpram(struct softing *card)
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{
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if (card->pdat->generation >= 2) {
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spin_lock_bh(&card->spin);
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iowrite8(ioread8(&card->dpram[DPRAM_V2_RESET]) | 1,
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&card->dpram[DPRAM_V2_RESET]);
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spin_unlock_bh(&card->spin);
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}
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}
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/* trigger the tx queue-ing */
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static netdev_tx_t softing_netdev_start_xmit(struct sk_buff *skb,
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struct net_device *dev)
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{
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struct softing_priv *priv = netdev_priv(dev);
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struct softing *card = priv->card;
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int ret;
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uint8_t *ptr;
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uint8_t fifo_wr, fifo_rd;
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struct can_frame *cf = (struct can_frame *)skb->data;
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uint8_t buf[DPRAM_TX_SIZE];
|
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if (can_dropped_invalid_skb(dev, skb))
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return NETDEV_TX_OK;
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spin_lock(&card->spin);
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|
ret = NETDEV_TX_BUSY;
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if (!card->fw.up ||
|
(card->tx.pending >= TXMAX) ||
|
(priv->tx.pending >= TX_ECHO_SKB_MAX))
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goto xmit_done;
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fifo_wr = ioread8(&card->dpram[DPRAM_TX_WR]);
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fifo_rd = ioread8(&card->dpram[DPRAM_TX_RD]);
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if (fifo_wr == fifo_rd)
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/* fifo full */
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goto xmit_done;
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memset(buf, 0, sizeof(buf));
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ptr = buf;
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*ptr = CMD_TX;
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if (cf->can_id & CAN_RTR_FLAG)
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*ptr |= CMD_RTR;
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if (cf->can_id & CAN_EFF_FLAG)
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*ptr |= CMD_XTD;
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if (priv->index)
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*ptr |= CMD_BUS2;
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++ptr;
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*ptr++ = cf->can_dlc;
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*ptr++ = (cf->can_id >> 0);
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*ptr++ = (cf->can_id >> 8);
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if (cf->can_id & CAN_EFF_FLAG) {
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*ptr++ = (cf->can_id >> 16);
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*ptr++ = (cf->can_id >> 24);
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} else {
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/* increment 1, not 2 as you might think */
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ptr += 1;
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}
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if (!(cf->can_id & CAN_RTR_FLAG))
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memcpy(ptr, &cf->data[0], cf->can_dlc);
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memcpy_toio(&card->dpram[DPRAM_TX + DPRAM_TX_SIZE * fifo_wr],
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buf, DPRAM_TX_SIZE);
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if (++fifo_wr >= DPRAM_TX_CNT)
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fifo_wr = 0;
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iowrite8(fifo_wr, &card->dpram[DPRAM_TX_WR]);
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card->tx.last_bus = priv->index;
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++card->tx.pending;
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++priv->tx.pending;
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can_put_echo_skb(skb, dev, priv->tx.echo_put);
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++priv->tx.echo_put;
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if (priv->tx.echo_put >= TX_ECHO_SKB_MAX)
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priv->tx.echo_put = 0;
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/* can_put_echo_skb() saves the skb, safe to return TX_OK */
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ret = NETDEV_TX_OK;
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xmit_done:
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spin_unlock(&card->spin);
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if (card->tx.pending >= TXMAX) {
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int j;
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for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
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if (card->net[j])
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netif_stop_queue(card->net[j]);
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}
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}
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if (ret != NETDEV_TX_OK)
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netif_stop_queue(dev);
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return ret;
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}
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/*
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* shortcut for skb delivery
|
*/
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int softing_netdev_rx(struct net_device *netdev, const struct can_frame *msg,
|
ktime_t ktime)
|
{
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struct sk_buff *skb;
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struct can_frame *cf;
|
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skb = alloc_can_skb(netdev, &cf);
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if (!skb)
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return -ENOMEM;
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memcpy(cf, msg, sizeof(*msg));
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skb->tstamp = ktime;
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return netif_rx(skb);
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}
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/*
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* softing_handle_1
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* pop 1 entry from the DPRAM queue, and process
|
*/
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static int softing_handle_1(struct softing *card)
|
{
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struct net_device *netdev;
|
struct softing_priv *priv;
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ktime_t ktime;
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struct can_frame msg;
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int cnt = 0, lost_msg;
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uint8_t fifo_rd, fifo_wr, cmd;
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uint8_t *ptr;
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uint32_t tmp_u32;
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uint8_t buf[DPRAM_RX_SIZE];
|
|
memset(&msg, 0, sizeof(msg));
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/* test for lost msgs */
|
lost_msg = ioread8(&card->dpram[DPRAM_RX_LOST]);
|
if (lost_msg) {
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int j;
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/* reset condition */
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iowrite8(0, &card->dpram[DPRAM_RX_LOST]);
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/* prepare msg */
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msg.can_id = CAN_ERR_FLAG | CAN_ERR_CRTL;
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msg.can_dlc = CAN_ERR_DLC;
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msg.data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
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/*
|
* service to all buses, we don't know which it was applicable
|
* but only service buses that are online
|
*/
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for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
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netdev = card->net[j];
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if (!netdev)
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continue;
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if (!canif_is_active(netdev))
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/* a dead bus has no overflows */
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continue;
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++netdev->stats.rx_over_errors;
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softing_netdev_rx(netdev, &msg, 0);
|
}
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/* prepare for other use */
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memset(&msg, 0, sizeof(msg));
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++cnt;
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}
|
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fifo_rd = ioread8(&card->dpram[DPRAM_RX_RD]);
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fifo_wr = ioread8(&card->dpram[DPRAM_RX_WR]);
|
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if (++fifo_rd >= DPRAM_RX_CNT)
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fifo_rd = 0;
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if (fifo_wr == fifo_rd)
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return cnt;
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memcpy_fromio(buf, &card->dpram[DPRAM_RX + DPRAM_RX_SIZE*fifo_rd],
|
DPRAM_RX_SIZE);
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mb();
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/* trigger dual port RAM */
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iowrite8(fifo_rd, &card->dpram[DPRAM_RX_RD]);
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ptr = buf;
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cmd = *ptr++;
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if (cmd == 0xff)
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/* not quite useful, probably the card has got out */
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return 0;
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netdev = card->net[0];
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if (cmd & CMD_BUS2)
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netdev = card->net[1];
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priv = netdev_priv(netdev);
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if (cmd & CMD_ERR) {
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uint8_t can_state, state;
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|
state = *ptr++;
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msg.can_id = CAN_ERR_FLAG;
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msg.can_dlc = CAN_ERR_DLC;
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|
if (state & SF_MASK_BUSOFF) {
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can_state = CAN_STATE_BUS_OFF;
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msg.can_id |= CAN_ERR_BUSOFF;
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state = STATE_BUSOFF;
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} else if (state & SF_MASK_EPASSIVE) {
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can_state = CAN_STATE_ERROR_PASSIVE;
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msg.can_id |= CAN_ERR_CRTL;
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msg.data[1] = CAN_ERR_CRTL_TX_PASSIVE;
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state = STATE_EPASSIVE;
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} else {
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can_state = CAN_STATE_ERROR_ACTIVE;
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msg.can_id |= CAN_ERR_CRTL;
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state = STATE_EACTIVE;
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}
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/* update DPRAM */
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iowrite8(state, &card->dpram[priv->index ?
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DPRAM_INFO_BUSSTATE2 : DPRAM_INFO_BUSSTATE]);
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/* timestamp */
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tmp_u32 = le32_to_cpup((void *)ptr);
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ptr += 4;
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ktime = softing_raw2ktime(card, tmp_u32);
|
|
++netdev->stats.rx_errors;
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/* update internal status */
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if (can_state != priv->can.state) {
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priv->can.state = can_state;
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if (can_state == CAN_STATE_ERROR_PASSIVE)
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++priv->can.can_stats.error_passive;
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else if (can_state == CAN_STATE_BUS_OFF) {
|
/* this calls can_close_cleanup() */
|
++priv->can.can_stats.bus_off;
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can_bus_off(netdev);
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netif_stop_queue(netdev);
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}
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/* trigger socketcan */
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softing_netdev_rx(netdev, &msg, ktime);
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}
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} else {
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if (cmd & CMD_RTR)
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msg.can_id |= CAN_RTR_FLAG;
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msg.can_dlc = get_can_dlc(*ptr++);
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if (cmd & CMD_XTD) {
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msg.can_id |= CAN_EFF_FLAG;
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msg.can_id |= le32_to_cpup((void *)ptr);
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ptr += 4;
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} else {
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msg.can_id |= le16_to_cpup((void *)ptr);
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ptr += 2;
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}
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/* timestamp */
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tmp_u32 = le32_to_cpup((void *)ptr);
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ptr += 4;
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ktime = softing_raw2ktime(card, tmp_u32);
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if (!(msg.can_id & CAN_RTR_FLAG))
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memcpy(&msg.data[0], ptr, 8);
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ptr += 8;
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/* update socket */
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if (cmd & CMD_ACK) {
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/* acknowledge, was tx msg */
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struct sk_buff *skb;
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skb = priv->can.echo_skb[priv->tx.echo_get];
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if (skb)
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skb->tstamp = ktime;
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can_get_echo_skb(netdev, priv->tx.echo_get);
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++priv->tx.echo_get;
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if (priv->tx.echo_get >= TX_ECHO_SKB_MAX)
|
priv->tx.echo_get = 0;
|
if (priv->tx.pending)
|
--priv->tx.pending;
|
if (card->tx.pending)
|
--card->tx.pending;
|
++netdev->stats.tx_packets;
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if (!(msg.can_id & CAN_RTR_FLAG))
|
netdev->stats.tx_bytes += msg.can_dlc;
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} else {
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int ret;
|
|
ret = softing_netdev_rx(netdev, &msg, ktime);
|
if (ret == NET_RX_SUCCESS) {
|
++netdev->stats.rx_packets;
|
if (!(msg.can_id & CAN_RTR_FLAG))
|
netdev->stats.rx_bytes += msg.can_dlc;
|
} else {
|
++netdev->stats.rx_dropped;
|
}
|
}
|
}
|
++cnt;
|
return cnt;
|
}
|
|
/*
|
* real interrupt handler
|
*/
|
static irqreturn_t softing_irq_thread(int irq, void *dev_id)
|
{
|
struct softing *card = (struct softing *)dev_id;
|
struct net_device *netdev;
|
struct softing_priv *priv;
|
int j, offset, work_done;
|
|
work_done = 0;
|
spin_lock_bh(&card->spin);
|
while (softing_handle_1(card) > 0) {
|
++card->irq.svc_count;
|
++work_done;
|
}
|
spin_unlock_bh(&card->spin);
|
/* resume tx queue's */
|
offset = card->tx.last_bus;
|
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
|
if (card->tx.pending >= TXMAX)
|
break;
|
netdev = card->net[(j + offset + 1) % card->pdat->nbus];
|
if (!netdev)
|
continue;
|
priv = netdev_priv(netdev);
|
if (!canif_is_active(netdev))
|
/* it makes no sense to wake dead buses */
|
continue;
|
if (priv->tx.pending >= TX_ECHO_SKB_MAX)
|
continue;
|
++work_done;
|
netif_wake_queue(netdev);
|
}
|
return work_done ? IRQ_HANDLED : IRQ_NONE;
|
}
|
|
/*
|
* interrupt routines:
|
* schedule the 'real interrupt handler'
|
*/
|
static irqreturn_t softing_irq_v2(int irq, void *dev_id)
|
{
|
struct softing *card = (struct softing *)dev_id;
|
uint8_t ir;
|
|
ir = ioread8(&card->dpram[DPRAM_V2_IRQ_TOHOST]);
|
iowrite8(0, &card->dpram[DPRAM_V2_IRQ_TOHOST]);
|
return (1 == ir) ? IRQ_WAKE_THREAD : IRQ_NONE;
|
}
|
|
static irqreturn_t softing_irq_v1(int irq, void *dev_id)
|
{
|
struct softing *card = (struct softing *)dev_id;
|
uint8_t ir;
|
|
ir = ioread8(&card->dpram[DPRAM_IRQ_TOHOST]);
|
iowrite8(0, &card->dpram[DPRAM_IRQ_TOHOST]);
|
return ir ? IRQ_WAKE_THREAD : IRQ_NONE;
|
}
|
|
/*
|
* netdev/candev interoperability
|
*/
|
static int softing_netdev_open(struct net_device *ndev)
|
{
|
int ret;
|
|
/* check or determine and set bittime */
|
ret = open_candev(ndev);
|
if (ret)
|
return ret;
|
|
ret = softing_startstop(ndev, 1);
|
if (ret < 0)
|
close_candev(ndev);
|
|
return ret;
|
}
|
|
static int softing_netdev_stop(struct net_device *ndev)
|
{
|
int ret;
|
|
netif_stop_queue(ndev);
|
|
/* softing cycle does close_candev() */
|
ret = softing_startstop(ndev, 0);
|
return ret;
|
}
|
|
static int softing_candev_set_mode(struct net_device *ndev, enum can_mode mode)
|
{
|
int ret;
|
|
switch (mode) {
|
case CAN_MODE_START:
|
/* softing_startstop does close_candev() */
|
ret = softing_startstop(ndev, 1);
|
return ret;
|
case CAN_MODE_STOP:
|
case CAN_MODE_SLEEP:
|
return -EOPNOTSUPP;
|
}
|
return 0;
|
}
|
|
/*
|
* Softing device management helpers
|
*/
|
int softing_enable_irq(struct softing *card, int enable)
|
{
|
int ret;
|
|
if (!card->irq.nr) {
|
return 0;
|
} else if (card->irq.requested && !enable) {
|
free_irq(card->irq.nr, card);
|
card->irq.requested = 0;
|
} else if (!card->irq.requested && enable) {
|
ret = request_threaded_irq(card->irq.nr,
|
(card->pdat->generation >= 2) ?
|
softing_irq_v2 : softing_irq_v1,
|
softing_irq_thread, IRQF_SHARED,
|
dev_name(&card->pdev->dev), card);
|
if (ret) {
|
dev_alert(&card->pdev->dev,
|
"request_threaded_irq(%u) failed\n",
|
card->irq.nr);
|
return ret;
|
}
|
card->irq.requested = 1;
|
}
|
return 0;
|
}
|
|
static void softing_card_shutdown(struct softing *card)
|
{
|
int fw_up = 0;
|
|
if (mutex_lock_interruptible(&card->fw.lock)) {
|
/* return -ERESTARTSYS */;
|
}
|
fw_up = card->fw.up;
|
card->fw.up = 0;
|
|
if (card->irq.requested && card->irq.nr) {
|
free_irq(card->irq.nr, card);
|
card->irq.requested = 0;
|
}
|
if (fw_up) {
|
if (card->pdat->enable_irq)
|
card->pdat->enable_irq(card->pdev, 0);
|
softing_set_reset_dpram(card);
|
if (card->pdat->reset)
|
card->pdat->reset(card->pdev, 1);
|
}
|
mutex_unlock(&card->fw.lock);
|
}
|
|
static int softing_card_boot(struct softing *card)
|
{
|
int ret, j;
|
static const uint8_t stream[] = {
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, };
|
unsigned char back[sizeof(stream)];
|
|
if (mutex_lock_interruptible(&card->fw.lock))
|
return -ERESTARTSYS;
|
if (card->fw.up) {
|
mutex_unlock(&card->fw.lock);
|
return 0;
|
}
|
/* reset board */
|
if (card->pdat->enable_irq)
|
card->pdat->enable_irq(card->pdev, 1);
|
/* boot card */
|
softing_set_reset_dpram(card);
|
if (card->pdat->reset)
|
card->pdat->reset(card->pdev, 1);
|
for (j = 0; (j + sizeof(stream)) < card->dpram_size;
|
j += sizeof(stream)) {
|
|
memcpy_toio(&card->dpram[j], stream, sizeof(stream));
|
/* flush IO cache */
|
mb();
|
memcpy_fromio(back, &card->dpram[j], sizeof(stream));
|
|
if (!memcmp(back, stream, sizeof(stream)))
|
continue;
|
/* memory is not equal */
|
dev_alert(&card->pdev->dev, "dpram failed at 0x%04x\n", j);
|
ret = -EIO;
|
goto failed;
|
}
|
wmb();
|
/* load boot firmware */
|
ret = softing_load_fw(card->pdat->boot.fw, card, card->dpram,
|
card->dpram_size,
|
card->pdat->boot.offs - card->pdat->boot.addr);
|
if (ret < 0)
|
goto failed;
|
/* load loader firmware */
|
ret = softing_load_fw(card->pdat->load.fw, card, card->dpram,
|
card->dpram_size,
|
card->pdat->load.offs - card->pdat->load.addr);
|
if (ret < 0)
|
goto failed;
|
|
if (card->pdat->reset)
|
card->pdat->reset(card->pdev, 0);
|
softing_clr_reset_dpram(card);
|
ret = softing_bootloader_command(card, 0, "card boot");
|
if (ret < 0)
|
goto failed;
|
ret = softing_load_app_fw(card->pdat->app.fw, card);
|
if (ret < 0)
|
goto failed;
|
|
ret = softing_chip_poweron(card);
|
if (ret < 0)
|
goto failed;
|
|
card->fw.up = 1;
|
mutex_unlock(&card->fw.lock);
|
return 0;
|
failed:
|
card->fw.up = 0;
|
if (card->pdat->enable_irq)
|
card->pdat->enable_irq(card->pdev, 0);
|
softing_set_reset_dpram(card);
|
if (card->pdat->reset)
|
card->pdat->reset(card->pdev, 1);
|
mutex_unlock(&card->fw.lock);
|
return ret;
|
}
|
|
/*
|
* netdev sysfs
|
*/
|
static ssize_t show_chip(struct device *dev, struct device_attribute *attr,
|
char *buf)
|
{
|
struct net_device *ndev = to_net_dev(dev);
|
struct softing_priv *priv = netdev2softing(ndev);
|
|
return sprintf(buf, "%i\n", priv->chip);
|
}
|
|
static ssize_t show_output(struct device *dev, struct device_attribute *attr,
|
char *buf)
|
{
|
struct net_device *ndev = to_net_dev(dev);
|
struct softing_priv *priv = netdev2softing(ndev);
|
|
return sprintf(buf, "0x%02x\n", priv->output);
|
}
|
|
static ssize_t store_output(struct device *dev, struct device_attribute *attr,
|
const char *buf, size_t count)
|
{
|
struct net_device *ndev = to_net_dev(dev);
|
struct softing_priv *priv = netdev2softing(ndev);
|
struct softing *card = priv->card;
|
unsigned long val;
|
int ret;
|
|
ret = kstrtoul(buf, 0, &val);
|
if (ret < 0)
|
return ret;
|
val &= 0xFF;
|
|
ret = mutex_lock_interruptible(&card->fw.lock);
|
if (ret)
|
return -ERESTARTSYS;
|
if (netif_running(ndev)) {
|
mutex_unlock(&card->fw.lock);
|
return -EBUSY;
|
}
|
priv->output = val;
|
mutex_unlock(&card->fw.lock);
|
return count;
|
}
|
|
static const DEVICE_ATTR(chip, 0444, show_chip, NULL);
|
static const DEVICE_ATTR(output, 0644, show_output, store_output);
|
|
static const struct attribute *const netdev_sysfs_attrs[] = {
|
&dev_attr_chip.attr,
|
&dev_attr_output.attr,
|
NULL,
|
};
|
static const struct attribute_group netdev_sysfs_group = {
|
.name = NULL,
|
.attrs = (struct attribute **)netdev_sysfs_attrs,
|
};
|
|
static const struct net_device_ops softing_netdev_ops = {
|
.ndo_open = softing_netdev_open,
|
.ndo_stop = softing_netdev_stop,
|
.ndo_start_xmit = softing_netdev_start_xmit,
|
.ndo_change_mtu = can_change_mtu,
|
};
|
|
static const struct can_bittiming_const softing_btr_const = {
|
.name = "softing",
|
.tseg1_min = 1,
|
.tseg1_max = 16,
|
.tseg2_min = 1,
|
.tseg2_max = 8,
|
.sjw_max = 4, /* overruled */
|
.brp_min = 1,
|
.brp_max = 32, /* overruled */
|
.brp_inc = 1,
|
};
|
|
|
static struct net_device *softing_netdev_create(struct softing *card,
|
uint16_t chip_id)
|
{
|
struct net_device *netdev;
|
struct softing_priv *priv;
|
|
netdev = alloc_candev(sizeof(*priv), TX_ECHO_SKB_MAX);
|
if (!netdev) {
|
dev_alert(&card->pdev->dev, "alloc_candev failed\n");
|
return NULL;
|
}
|
priv = netdev_priv(netdev);
|
priv->netdev = netdev;
|
priv->card = card;
|
memcpy(&priv->btr_const, &softing_btr_const, sizeof(priv->btr_const));
|
priv->btr_const.brp_max = card->pdat->max_brp;
|
priv->btr_const.sjw_max = card->pdat->max_sjw;
|
priv->can.bittiming_const = &priv->btr_const;
|
priv->can.clock.freq = 8000000;
|
priv->chip = chip_id;
|
priv->output = softing_default_output(netdev);
|
SET_NETDEV_DEV(netdev, &card->pdev->dev);
|
|
netdev->flags |= IFF_ECHO;
|
netdev->netdev_ops = &softing_netdev_ops;
|
priv->can.do_set_mode = softing_candev_set_mode;
|
priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
|
|
return netdev;
|
}
|
|
static int softing_netdev_register(struct net_device *netdev)
|
{
|
int ret;
|
|
ret = register_candev(netdev);
|
if (ret) {
|
dev_alert(&netdev->dev, "register failed\n");
|
return ret;
|
}
|
if (sysfs_create_group(&netdev->dev.kobj, &netdev_sysfs_group) < 0)
|
netdev_alert(netdev, "sysfs group failed\n");
|
|
return 0;
|
}
|
|
static void softing_netdev_cleanup(struct net_device *netdev)
|
{
|
sysfs_remove_group(&netdev->dev.kobj, &netdev_sysfs_group);
|
unregister_candev(netdev);
|
free_candev(netdev);
|
}
|
|
/*
|
* sysfs for Platform device
|
*/
|
#define DEV_ATTR_RO(name, member) \
|
static ssize_t show_##name(struct device *dev, \
|
struct device_attribute *attr, char *buf) \
|
{ \
|
struct softing *card = dev_get_drvdata(dev); \
|
return sprintf(buf, "%u\n", card->member); \
|
} \
|
static DEVICE_ATTR(name, 0444, show_##name, NULL)
|
|
#define DEV_ATTR_RO_STR(name, member) \
|
static ssize_t show_##name(struct device *dev, \
|
struct device_attribute *attr, char *buf) \
|
{ \
|
struct softing *card = dev_get_drvdata(dev); \
|
return sprintf(buf, "%s\n", card->member); \
|
} \
|
static DEVICE_ATTR(name, 0444, show_##name, NULL)
|
|
DEV_ATTR_RO(serial, id.serial);
|
DEV_ATTR_RO_STR(firmware, pdat->app.fw);
|
DEV_ATTR_RO(firmware_version, id.fw_version);
|
DEV_ATTR_RO_STR(hardware, pdat->name);
|
DEV_ATTR_RO(hardware_version, id.hw_version);
|
DEV_ATTR_RO(license, id.license);
|
|
static struct attribute *softing_pdev_attrs[] = {
|
&dev_attr_serial.attr,
|
&dev_attr_firmware.attr,
|
&dev_attr_firmware_version.attr,
|
&dev_attr_hardware.attr,
|
&dev_attr_hardware_version.attr,
|
&dev_attr_license.attr,
|
NULL,
|
};
|
|
static const struct attribute_group softing_pdev_group = {
|
.name = NULL,
|
.attrs = softing_pdev_attrs,
|
};
|
|
/*
|
* platform driver
|
*/
|
static int softing_pdev_remove(struct platform_device *pdev)
|
{
|
struct softing *card = platform_get_drvdata(pdev);
|
int j;
|
|
/* first, disable card*/
|
softing_card_shutdown(card);
|
|
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
|
if (!card->net[j])
|
continue;
|
softing_netdev_cleanup(card->net[j]);
|
card->net[j] = NULL;
|
}
|
sysfs_remove_group(&pdev->dev.kobj, &softing_pdev_group);
|
|
iounmap(card->dpram);
|
kfree(card);
|
return 0;
|
}
|
|
static int softing_pdev_probe(struct platform_device *pdev)
|
{
|
const struct softing_platform_data *pdat = dev_get_platdata(&pdev->dev);
|
struct softing *card;
|
struct net_device *netdev;
|
struct softing_priv *priv;
|
struct resource *pres;
|
int ret;
|
int j;
|
|
if (!pdat) {
|
dev_warn(&pdev->dev, "no platform data\n");
|
return -EINVAL;
|
}
|
if (pdat->nbus > ARRAY_SIZE(card->net)) {
|
dev_warn(&pdev->dev, "%u nets??\n", pdat->nbus);
|
return -EINVAL;
|
}
|
|
card = kzalloc(sizeof(*card), GFP_KERNEL);
|
if (!card)
|
return -ENOMEM;
|
card->pdat = pdat;
|
card->pdev = pdev;
|
platform_set_drvdata(pdev, card);
|
mutex_init(&card->fw.lock);
|
spin_lock_init(&card->spin);
|
|
ret = -EINVAL;
|
pres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
if (!pres)
|
goto platform_resource_failed;
|
card->dpram_phys = pres->start;
|
card->dpram_size = resource_size(pres);
|
card->dpram = ioremap(card->dpram_phys, card->dpram_size);
|
if (!card->dpram) {
|
dev_alert(&card->pdev->dev, "dpram ioremap failed\n");
|
goto ioremap_failed;
|
}
|
|
pres = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
if (pres)
|
card->irq.nr = pres->start;
|
|
/* reset card */
|
ret = softing_card_boot(card);
|
if (ret < 0) {
|
dev_alert(&pdev->dev, "failed to boot\n");
|
goto boot_failed;
|
}
|
|
/* only now, the chip's are known */
|
card->id.freq = card->pdat->freq;
|
|
ret = sysfs_create_group(&pdev->dev.kobj, &softing_pdev_group);
|
if (ret < 0) {
|
dev_alert(&card->pdev->dev, "sysfs failed\n");
|
goto sysfs_failed;
|
}
|
|
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
|
card->net[j] = netdev =
|
softing_netdev_create(card, card->id.chip[j]);
|
if (!netdev) {
|
dev_alert(&pdev->dev, "failed to make can[%i]", j);
|
ret = -ENOMEM;
|
goto netdev_failed;
|
}
|
netdev->dev_id = j;
|
priv = netdev_priv(card->net[j]);
|
priv->index = j;
|
ret = softing_netdev_register(netdev);
|
if (ret) {
|
free_candev(netdev);
|
card->net[j] = NULL;
|
dev_alert(&card->pdev->dev,
|
"failed to register can[%i]\n", j);
|
goto netdev_failed;
|
}
|
}
|
dev_info(&card->pdev->dev, "%s ready.\n", card->pdat->name);
|
return 0;
|
|
netdev_failed:
|
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
|
if (!card->net[j])
|
continue;
|
softing_netdev_cleanup(card->net[j]);
|
}
|
sysfs_remove_group(&pdev->dev.kobj, &softing_pdev_group);
|
sysfs_failed:
|
softing_card_shutdown(card);
|
boot_failed:
|
iounmap(card->dpram);
|
ioremap_failed:
|
platform_resource_failed:
|
kfree(card);
|
return ret;
|
}
|
|
static struct platform_driver softing_driver = {
|
.driver = {
|
.name = "softing",
|
},
|
.probe = softing_pdev_probe,
|
.remove = softing_pdev_remove,
|
};
|
|
module_platform_driver(softing_driver);
|
|
MODULE_ALIAS("platform:softing");
|
MODULE_DESCRIPTION("Softing DPRAM CAN driver");
|
MODULE_AUTHOR("Kurt Van Dijck <kurt.van.dijck@eia.be>");
|
MODULE_LICENSE("GPL v2");
|
