| /* |
| * Copyright (C) 2008-2010 |
| * |
| * - Kurt Van Dijck, EIA Electronics |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the version 2 of the GNU General Public License |
| * as published by the Free Software Foundation |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/interrupt.h> |
| #include <asm/io.h> |
| |
| #include "softing.h" |
| |
| #define TX_ECHO_SKB_MAX (((TXMAX+1)/2)-1) |
| |
| /* |
| * test is a specific CAN netdev |
| * is online (ie. up 'n running, not sleeping, not busoff |
| */ |
| static inline int canif_is_active(struct net_device *netdev) |
| { |
| struct can_priv *can = netdev_priv(netdev); |
| |
| if (!netif_running(netdev)) |
| return 0; |
| return (can->state <= CAN_STATE_ERROR_PASSIVE); |
| } |
| |
| /* reset DPRAM */ |
| static inline void softing_set_reset_dpram(struct softing *card) |
| { |
| if (card->pdat->generation >= 2) { |
| spin_lock_bh(&card->spin); |
| iowrite8(ioread8(&card->dpram[DPRAM_V2_RESET]) & ~1, |
| &card->dpram[DPRAM_V2_RESET]); |
| spin_unlock_bh(&card->spin); |
| } |
| } |
| |
| static inline void softing_clr_reset_dpram(struct softing *card) |
| { |
| if (card->pdat->generation >= 2) { |
| spin_lock_bh(&card->spin); |
| iowrite8(ioread8(&card->dpram[DPRAM_V2_RESET]) | 1, |
| &card->dpram[DPRAM_V2_RESET]); |
| spin_unlock_bh(&card->spin); |
| } |
| } |
| |
| /* trigger the tx queue-ing */ |
| static netdev_tx_t softing_netdev_start_xmit(struct sk_buff *skb, |
| struct net_device *dev) |
| { |
| struct softing_priv *priv = netdev_priv(dev); |
| struct softing *card = priv->card; |
| int ret; |
| uint8_t *ptr; |
| uint8_t fifo_wr, fifo_rd; |
| struct can_frame *cf = (struct can_frame *)skb->data; |
| uint8_t buf[DPRAM_TX_SIZE]; |
| |
| if (can_dropped_invalid_skb(dev, skb)) |
| return NETDEV_TX_OK; |
| |
| spin_lock(&card->spin); |
| |
| ret = NETDEV_TX_BUSY; |
| if (!card->fw.up || |
| (card->tx.pending >= TXMAX) || |
| (priv->tx.pending >= TX_ECHO_SKB_MAX)) |
| goto xmit_done; |
| fifo_wr = ioread8(&card->dpram[DPRAM_TX_WR]); |
| fifo_rd = ioread8(&card->dpram[DPRAM_TX_RD]); |
| if (fifo_wr == fifo_rd) |
| /* fifo full */ |
| goto xmit_done; |
| memset(buf, 0, sizeof(buf)); |
| ptr = buf; |
| *ptr = CMD_TX; |
| if (cf->can_id & CAN_RTR_FLAG) |
| *ptr |= CMD_RTR; |
| if (cf->can_id & CAN_EFF_FLAG) |
| *ptr |= CMD_XTD; |
| if (priv->index) |
| *ptr |= CMD_BUS2; |
| ++ptr; |
| *ptr++ = cf->can_dlc; |
| *ptr++ = (cf->can_id >> 0); |
| *ptr++ = (cf->can_id >> 8); |
| if (cf->can_id & CAN_EFF_FLAG) { |
| *ptr++ = (cf->can_id >> 16); |
| *ptr++ = (cf->can_id >> 24); |
| } else { |
| /* increment 1, not 2 as you might think */ |
| ptr += 1; |
| } |
| if (!(cf->can_id & CAN_RTR_FLAG)) |
| memcpy(ptr, &cf->data[0], cf->can_dlc); |
| memcpy_toio(&card->dpram[DPRAM_TX + DPRAM_TX_SIZE * fifo_wr], |
| buf, DPRAM_TX_SIZE); |
| if (++fifo_wr >= DPRAM_TX_CNT) |
| fifo_wr = 0; |
| iowrite8(fifo_wr, &card->dpram[DPRAM_TX_WR]); |
| card->tx.last_bus = priv->index; |
| ++card->tx.pending; |
| ++priv->tx.pending; |
| can_put_echo_skb(skb, dev, priv->tx.echo_put); |
| ++priv->tx.echo_put; |
| if (priv->tx.echo_put >= TX_ECHO_SKB_MAX) |
| priv->tx.echo_put = 0; |
| /* can_put_echo_skb() saves the skb, safe to return TX_OK */ |
| ret = NETDEV_TX_OK; |
| xmit_done: |
| spin_unlock(&card->spin); |
| if (card->tx.pending >= TXMAX) { |
| int j; |
| for (j = 0; j < ARRAY_SIZE(card->net); ++j) { |
| if (card->net[j]) |
| netif_stop_queue(card->net[j]); |
| } |
| } |
| if (ret != NETDEV_TX_OK) |
| netif_stop_queue(dev); |
| |
| return ret; |
| } |
| |
| /* |
| * shortcut for skb delivery |
| */ |
| int softing_netdev_rx(struct net_device *netdev, const struct can_frame *msg, |
| ktime_t ktime) |
| { |
| struct sk_buff *skb; |
| struct can_frame *cf; |
| |
| skb = alloc_can_skb(netdev, &cf); |
| if (!skb) |
| return -ENOMEM; |
| memcpy(cf, msg, sizeof(*msg)); |
| skb->tstamp = ktime; |
| return netif_rx(skb); |
| } |
| |
| /* |
| * softing_handle_1 |
| * pop 1 entry from the DPRAM queue, and process |
| */ |
| static int softing_handle_1(struct softing *card) |
| { |
| struct net_device *netdev; |
| struct softing_priv *priv; |
| ktime_t ktime; |
| struct can_frame msg; |
| int cnt = 0, lost_msg; |
| uint8_t fifo_rd, fifo_wr, cmd; |
| uint8_t *ptr; |
| uint32_t tmp_u32; |
| uint8_t buf[DPRAM_RX_SIZE]; |
| |
| memset(&msg, 0, sizeof(msg)); |
| /* test for lost msgs */ |
| lost_msg = ioread8(&card->dpram[DPRAM_RX_LOST]); |
| if (lost_msg) { |
| int j; |
| /* reset condition */ |
| iowrite8(0, &card->dpram[DPRAM_RX_LOST]); |
| /* prepare msg */ |
| msg.can_id = CAN_ERR_FLAG | CAN_ERR_CRTL; |
| msg.can_dlc = CAN_ERR_DLC; |
| msg.data[1] = CAN_ERR_CRTL_RX_OVERFLOW; |
| /* |
| * service to all busses, we don't know which it was applicable |
| * but only service busses that are online |
| */ |
| for (j = 0; j < ARRAY_SIZE(card->net); ++j) { |
| netdev = card->net[j]; |
| if (!netdev) |
| continue; |
| if (!canif_is_active(netdev)) |
| /* a dead bus has no overflows */ |
| continue; |
| ++netdev->stats.rx_over_errors; |
| softing_netdev_rx(netdev, &msg, 0); |
| } |
| /* prepare for other use */ |
| memset(&msg, 0, sizeof(msg)); |
| ++cnt; |
| } |
| |
| fifo_rd = ioread8(&card->dpram[DPRAM_RX_RD]); |
| fifo_wr = ioread8(&card->dpram[DPRAM_RX_WR]); |
| |
| if (++fifo_rd >= DPRAM_RX_CNT) |
| fifo_rd = 0; |
| if (fifo_wr == fifo_rd) |
| return cnt; |
| |
| memcpy_fromio(buf, &card->dpram[DPRAM_RX + DPRAM_RX_SIZE*fifo_rd], |
| DPRAM_RX_SIZE); |
| mb(); |
| /* trigger dual port RAM */ |
| iowrite8(fifo_rd, &card->dpram[DPRAM_RX_RD]); |
| |
| ptr = buf; |
| cmd = *ptr++; |
| if (cmd == 0xff) |
| /* not quite useful, probably the card has got out */ |
| return 0; |
| netdev = card->net[0]; |
| if (cmd & CMD_BUS2) |
| netdev = card->net[1]; |
| priv = netdev_priv(netdev); |
| |
| if (cmd & CMD_ERR) { |
| uint8_t can_state, state; |
| |
| state = *ptr++; |
| |
| msg.can_id = CAN_ERR_FLAG; |
| msg.can_dlc = CAN_ERR_DLC; |
| |
| if (state & SF_MASK_BUSOFF) { |
| can_state = CAN_STATE_BUS_OFF; |
| msg.can_id |= CAN_ERR_BUSOFF; |
| state = STATE_BUSOFF; |
| } else if (state & SF_MASK_EPASSIVE) { |
| can_state = CAN_STATE_ERROR_PASSIVE; |
| msg.can_id |= CAN_ERR_CRTL; |
| msg.data[1] = CAN_ERR_CRTL_TX_PASSIVE; |
| state = STATE_EPASSIVE; |
| } else { |
| can_state = CAN_STATE_ERROR_ACTIVE; |
| msg.can_id |= CAN_ERR_CRTL; |
| state = STATE_EACTIVE; |
| } |
| /* update DPRAM */ |
| iowrite8(state, &card->dpram[priv->index ? |
| DPRAM_INFO_BUSSTATE2 : DPRAM_INFO_BUSSTATE]); |
| /* timestamp */ |
| tmp_u32 = le32_to_cpup((void *)ptr); |
| ptr += 4; |
| ktime = softing_raw2ktime(card, tmp_u32); |
| |
| ++netdev->stats.rx_errors; |
| /* update internal status */ |
| if (can_state != priv->can.state) { |
| priv->can.state = can_state; |
| if (can_state == CAN_STATE_ERROR_PASSIVE) |
| ++priv->can.can_stats.error_passive; |
| else if (can_state == CAN_STATE_BUS_OFF) { |
| /* this calls can_close_cleanup() */ |
| ++priv->can.can_stats.bus_off; |
| can_bus_off(netdev); |
| netif_stop_queue(netdev); |
| } |
| /* trigger socketcan */ |
| softing_netdev_rx(netdev, &msg, ktime); |
| } |
| |
| } else { |
| if (cmd & CMD_RTR) |
| msg.can_id |= CAN_RTR_FLAG; |
| msg.can_dlc = get_can_dlc(*ptr++); |
| if (cmd & CMD_XTD) { |
| msg.can_id |= CAN_EFF_FLAG; |
| msg.can_id |= le32_to_cpup((void *)ptr); |
| ptr += 4; |
| } else { |
| msg.can_id |= le16_to_cpup((void *)ptr); |
| ptr += 2; |
| } |
| /* timestamp */ |
| tmp_u32 = le32_to_cpup((void *)ptr); |
| ptr += 4; |
| ktime = softing_raw2ktime(card, tmp_u32); |
| if (!(msg.can_id & CAN_RTR_FLAG)) |
| memcpy(&msg.data[0], ptr, 8); |
| ptr += 8; |
| /* update socket */ |
| if (cmd & CMD_ACK) { |
| /* acknowledge, was tx msg */ |
| struct sk_buff *skb; |
| skb = priv->can.echo_skb[priv->tx.echo_get]; |
| if (skb) |
| skb->tstamp = ktime; |
| can_get_echo_skb(netdev, priv->tx.echo_get); |
| ++priv->tx.echo_get; |
| 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; |
| if (!(msg.can_id & CAN_RTR_FLAG)) |
| netdev->stats.tx_bytes += msg.can_dlc; |
| } else { |
| 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 busses */ |
| 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 inter-operability |
| */ |
| 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, S_IRUGO, show_chip, NULL); |
| static const DEVICE_ATTR(output, S_IRUGO | S_IWUSR, 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 = platform_get_drvdata(to_platform_device(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 = platform_get_drvdata(to_platform_device(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_nocache(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"); |