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Message-ID: <20101223094302.GB325@e-circ.dyndns.org>
Date: Thu, 23 Dec 2010 10:43:03 +0100
From: Kurt Van Dijck <kurt.van.dijck@....be>
To: netdev@...r.kernel.org, socketcan-core@...ts.berlios.de
Subject: [PATCH net-next-2.6 1/2] can: add driver for Softing card
This patch adds a driver for the platform:softing device.
This will create (up to) 2 CAN network devices from 1
platform:softing device
Signed-off-by: Kurt Van Dijck <kurt.van.dijck@....be>
---
drivers/net/can/Kconfig | 2 +
drivers/net/can/Makefile | 1 +
drivers/net/can/softing/Kconfig | 16 +
drivers/net/can/softing/Makefile | 5 +
drivers/net/can/softing/softing.h | 216 +++++++
drivers/net/can/softing/softing_fw.c | 664 ++++++++++++++++++++
drivers/net/can/softing/softing_main.c | 935 ++++++++++++++++++++++++++++
drivers/net/can/softing/softing_platform.h | 38 ++
8 files changed, 1877 insertions(+), 0 deletions(-)
diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
index d5a9db6..986195e 100644
--- a/drivers/net/can/Kconfig
+++ b/drivers/net/can/Kconfig
@@ -117,6 +117,8 @@ source "drivers/net/can/sja1000/Kconfig"
source "drivers/net/can/usb/Kconfig"
+source "drivers/net/can/softing/Kconfig"
+
config CAN_DEBUG_DEVICES
bool "CAN devices debugging messages"
depends on CAN
diff --git a/drivers/net/can/Makefile b/drivers/net/can/Makefile
index 07ca159..53c82a7 100644
--- a/drivers/net/can/Makefile
+++ b/drivers/net/can/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_CAN_DEV) += can-dev.o
can-dev-y := dev.o
obj-y += usb/
+obj-y += softing/
obj-$(CONFIG_CAN_SJA1000) += sja1000/
obj-$(CONFIG_CAN_MSCAN) += mscan/
diff --git a/drivers/net/can/softing/Kconfig b/drivers/net/can/softing/Kconfig
new file mode 100644
index 0000000..072f337
--- /dev/null
+++ b/drivers/net/can/softing/Kconfig
@@ -0,0 +1,16 @@
+config CAN_SOFTING
+ tristate "Softing Gmbh CAN generic support"
+ depends on CAN_DEV
+ ---help---
+ Support for CAN cards from Softing Gmbh & some cards
+ from Vector Gmbh.
+ Softing Gmbh CAN cards come with 1 or 2 physical busses.
+ Those cards typically use Dual Port RAM to communicate
+ with the host CPU. The interface is then identical for PCI
+ and PCMCIA cards. This driver operates on a platform device,
+ which has been created by softing_cs or softing_pci driver.
+ Warning:
+ The API of the card does not allow fine control per bus, but
+ controls the 2 busses on the card together.
+ As such, some actions (start/stop/busoff recovery) on 1 bus
+ must bring down the other bus too temporarily.
diff --git a/drivers/net/can/softing/Makefile b/drivers/net/can/softing/Makefile
new file mode 100644
index 0000000..7878b7b
--- /dev/null
+++ b/drivers/net/can/softing/Makefile
@@ -0,0 +1,5 @@
+
+softing-y := softing_main.o softing_fw.o
+obj-$(CONFIG_CAN_SOFTING) += softing.o
+
+ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG
diff --git a/drivers/net/can/softing/softing.h b/drivers/net/can/softing/softing.h
new file mode 100644
index 0000000..99046a7
--- /dev/null
+++ b/drivers/net/can/softing/softing.h
@@ -0,0 +1,216 @@
+/*
+ * softing common interfaces
+ *
+ * by Kurt Van Dijck, 06-2008
+ */
+
+#include <linux/netdevice.h>
+#include <linux/ktime.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/can.h>
+#include <linux/can/dev.h>
+
+#include "softing_platform.h"
+
+#ifndef CAN_CTRLMODE_BERR_REPORTING
+#define CAN_CTRLMODE_BERR_REPORTING 0
+#endif
+
+struct softing;
+
+struct softing_priv {
+ struct can_priv can; /* must be the first member! */
+ struct net_device *netdev;
+ struct softing *card;
+ struct {
+ int pending;
+ /* variables wich hold the circular buffer */
+ int echo_put;
+ int echo_get;
+ } tx;
+ struct can_bittiming_const btr_const;
+ int index;
+ u8 output;
+ u16 chip;
+};
+#define netdev2softing(netdev) ((struct softing_priv *)netdev_priv(netdev))
+
+struct softing {
+ const struct softing_platform_data *pdat;
+ struct platform_device *pdev;
+ struct net_device *net[2];
+ spinlock_t spin; /* protect this structure & DPRAM access */
+ ktime_t ts_ref;
+ ktime_t ts_overflow; /* timestamp overflow value, in ktime */
+
+ struct {
+ /* indication of firmware status */
+ int up;
+ /* protection of the 'up' variable */
+ struct mutex lock;
+ } fw;
+ struct {
+ int nr;
+ int requested;
+ struct tasklet_struct bh;
+ int svc_count;
+ } irq;
+ struct {
+ int pending;
+ int last_bus;
+ /* keep the bus that last tx'd a message,
+ * in order to let every netdev queue resume
+ */
+ } tx;
+ struct {
+ unsigned long phys;
+ unsigned long size;
+ unsigned char *virt;
+ unsigned char *end;
+ struct softing_fct *fct;
+ struct softing_info *info;
+ struct softing_rx *rx;
+ struct softing_tx *tx;
+ struct softing_irq *irq;
+ unsigned short *command;
+ unsigned short *receipt;
+ } dpram;
+ struct {
+ u32 serial, fw, hw, lic;
+ u16 chip[2];
+ u32 freq;
+ } id;
+};
+
+extern int softing_default_output(struct net_device *netdev);
+
+extern ktime_t softing_raw2ktime(struct softing *card, u32 raw);
+
+extern int softing_fct_cmd(struct softing *card
+ , int cmd, int vector, const char *msg);
+
+extern int softing_bootloader_command(struct softing *card
+ , int command, const char *msg);
+
+/* reset DPRAM */
+static inline void softing_set_reset_dpram(struct softing *card)
+{
+ if (card->pdat->generation >= 2) {
+ spin_lock_bh(&card->spin);
+ card->dpram.virt[0xe00] &= ~1;
+ 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);
+ card->dpram.virt[0xe00] |= 1;
+ spin_unlock_bh(&card->spin);
+ }
+}
+
+/* Load firmware after reset */
+extern int softing_load_fw(const char *file, struct softing *card,
+ unsigned char *virt, unsigned int size, int offset);
+
+/* Load final application firmware after bootloader */
+extern int softing_load_app_fw(const char *file, struct softing *card);
+
+extern int softing_reset_chip(struct softing *card);
+
+/*
+ * enable or disable irq
+ * only called with fw.lock locked
+ */
+extern int softing_enable_irq(struct softing *card, int enable);
+
+/* start/stop 1 bus on card */
+extern int softing_startstop(struct net_device *netdev, int up);
+
+/* netif_rx() */
+extern int softing_netdev_rx(struct net_device *netdev,
+ const struct can_frame *msg, ktime_t ktime);
+
+/* SOFTING DPRAM mappings */
+struct softing_rx {
+ u8 fifo[16][32];
+ u8 dummy1;
+ u16 rd;
+ u16 dummy2;
+ u16 wr;
+ u16 dummy3;
+ u16 lost_msg;
+} __attribute__((packed));
+
+#define TXMAX 31
+struct softing_tx {
+ u8 fifo[32][16];
+ u8 dummy1;
+ u16 rd;
+ u16 dummy2;
+ u16 wr;
+ u8 dummy3;
+} __attribute__((packed));
+
+struct softing_irq {
+ u8 to_host;
+ u8 to_card;
+} __attribute__((packed));
+
+struct softing_fct {
+ s16 param[20]; /* 0 is index */
+ s16 returned;
+ u8 dummy;
+ u16 host_access;
+} __attribute__((packed));
+
+struct softing_info {
+ u8 dummy1;
+ u16 bus_state;
+ u16 dummy2;
+ u16 bus_state2;
+ u16 dummy3;
+ u16 error_state;
+ u16 dummy4;
+ u16 error_state2;
+ u16 dummy5;
+ u16 reset;
+ u16 dummy6;
+ u16 clear_rcv_fifo;
+ u16 dummy7;
+ u16 dummyxx;
+ u16 dummy8;
+ u16 time_reset;
+ u8 dummy9;
+ u32 time;
+ u32 time_wrap;
+ u8 wr_start;
+ u8 wr_end;
+ u8 dummy10;
+ u16 dummy12;
+ u16 dummy12x;
+ u16 dummy13;
+ u16 reset_rcv_fifo;
+ u8 dummy14;
+ u8 reset_xmt_fifo;
+ u8 read_fifo_levels;
+ u16 rcv_fifo_level;
+ u16 xmt_fifo_level;
+} __attribute__((packed));
+
+/* DPRAM return codes */
+#define RES_NONE 0
+#define RES_OK 1
+#define RES_NOK 2
+#define RES_UNKNOWN 3
+/* DPRAM flags */
+#define CMD_TX 0x01
+#define CMD_ACK 0x02
+#define CMD_XTD 0x04
+#define CMD_RTR 0x08
+#define CMD_ERR 0x10
+#define CMD_BUS2 0x80
+
diff --git a/drivers/net/can/softing/softing_fw.c b/drivers/net/can/softing/softing_fw.c
new file mode 100644
index 0000000..f61299c
--- /dev/null
+++ b/drivers/net/can/softing/softing_fw.c
@@ -0,0 +1,664 @@
+/*
+* drivers/net/can/softing/softing_fw.c
+*
+* 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, write to the Free Software
+* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include <linux/firmware.h>
+#include <linux/sched.h>
+#include <asm/div64.h>
+
+#include "softing.h"
+
+int softing_fct_cmd(struct softing *card, int cmd, int vector, const char *msg)
+{
+ int ret;
+ unsigned long stamp;
+ if (vector == RES_OK)
+ vector = RES_NONE;
+ card->dpram.fct->param[0] = cmd;
+ card->dpram.fct->host_access = vector;
+ /* be sure to flush this to the card */
+ wmb();
+ stamp = jiffies;
+ /*wait for card */
+ do {
+ ret = card->dpram.fct->host_access;
+ /* don't have any cached variables */
+ rmb();
+ if (ret == RES_OK) {
+ /*don't read return-value now */
+ ret = card->dpram.fct->returned;
+ if (ret)
+ dev_alert(&card->pdev->dev,
+ "%s returned %u\n", msg, ret);
+ return 0;
+ }
+ if ((jiffies - stamp) >= 1 * HZ)
+ break;
+ if (in_interrupt())
+ /* go as fast as possible */
+ continue;
+ /* process context => relax */
+ schedule();
+ } while (!signal_pending(current));
+
+ if (ret == RES_NONE) {
+ dev_alert(&card->pdev->dev,
+ "%s, no response from card on %u/0x%02x\n",
+ msg, cmd, vector);
+ return 1;
+ } else {
+ dev_alert(&card->pdev->dev,
+ "%s, bad response from card on %u/0x%02x, 0x%04x\n",
+ msg, cmd, vector, ret);
+ /*make sure to return something not 0 */
+ return ret ? ret : 1;
+ }
+}
+
+int softing_bootloader_command(struct softing *card
+ , int command, const char *msg)
+{
+ int ret;
+ unsigned long stamp;
+ card->dpram.receipt[0] = RES_NONE;
+ card->dpram.command[0] = command;
+ /* be sure to flush this to the card */
+ wmb();
+ stamp = jiffies;
+ /*wait for card */
+ do {
+ ret = card->dpram.receipt[0];
+ /* don't have any cached variables */
+ rmb();
+ if (ret == RES_OK)
+ return 0;
+ if ((jiffies - stamp) >= (3 * HZ))
+ break;
+ schedule();
+ } while (!signal_pending(current));
+
+ switch (ret) {
+ case RES_NONE:
+ dev_alert(&card->pdev->dev, "%s: no response from card\n", msg);
+ break;
+ case RES_NOK:
+ dev_alert(&card->pdev->dev, "%s: response from card nok\n",
+ msg);
+ break;
+ case RES_UNKNOWN:
+ dev_alert(&card->pdev->dev, "%s: command 0x%04x unknown\n",
+ msg, command);
+ break;
+ default:
+ dev_alert(&card->pdev->dev, "%s: bad response from card: %i\n",
+ msg, ret);
+ break;
+ }
+ return ret ? ret : 1;
+}
+
+struct fw_hdr {
+ u16 type;
+ u32 addr;
+ u16 len;
+ u16 checksum;
+ const unsigned char *base;
+} __attribute__ ((packed));
+
+static int fw_parse(const unsigned char **pmem, struct fw_hdr *hdr)
+{
+ u16 tmp;
+ const unsigned char *mem;
+ const unsigned char *end;
+ mem = *pmem;
+ hdr->type = (mem[0] << 0) | (mem[1] << 8);
+ hdr->addr = (mem[2] << 0) | (mem[3] << 8)
+ | (mem[4] << 16) | (mem[5] << 24);
+ hdr->len = (mem[6] << 0) | (mem[7] << 8);
+ hdr->base = &mem[8];
+ hdr->checksum =
+ (hdr->base[hdr->len] << 0) | (hdr->base[hdr->len + 1] << 8);
+ for (tmp = 0, mem = *pmem, end = &hdr->base[hdr->len]; mem < end; ++mem)
+ tmp += *mem;
+ if (tmp != hdr->checksum)
+ return -EINVAL;
+ *pmem += 10 + hdr->len;
+ return 0;
+}
+
+int softing_load_fw(const char *file, struct softing *card,
+ unsigned char *virt, unsigned int size, int offset)
+{
+ const struct firmware *fw;
+ const unsigned char *mem;
+ const unsigned char *end;
+ int ret = 0;
+ u32 start_addr;
+ struct fw_hdr rec;
+ int ok = 0;
+ unsigned char buf[1024];
+
+ ret = request_firmware(&fw, file, &card->pdev->dev);
+ if (ret) {
+ dev_alert(&card->pdev->dev, "request_firmware(%s) got %i\n",
+ file, ret);
+ return ret;
+ }
+ dev_dbg(&card->pdev->dev, "%s, firmware(%s) got %u bytes"
+ ", offset %c0x%04x\n",
+ card->pdat->name, file, (unsigned int)fw->size,
+ (offset >= 0) ? '+' : '-', (unsigned int)abs(offset));
+ /* parse the firmware */
+ mem = fw->data;
+ end = &mem[fw->size];
+ /* look for header record */
+ ret = fw_parse(&mem, &rec);
+ if (ret < 0)
+ goto fw_end;
+ if (rec.type != 0xffff) {
+ dev_alert(&card->pdev->dev, "firware starts with type 0x%04x\n",
+ rec.type);
+ goto fw_end;
+ }
+ if (strncmp("Structured Binary Format, Softing GmbH"
+ , rec.base, rec.len)) {
+ dev_info(&card->pdev->dev, "firware string '%.*s'\n",
+ rec.len, rec.base);
+ goto fw_end;
+ }
+ ok |= 1;
+ /* ok, we had a header */
+ while (mem < end) {
+ ret = fw_parse(&mem, &rec);
+ if (ret)
+ break;
+ if (rec.type == 3) {
+ /*start address */
+ start_addr = rec.addr;
+ ok |= 2;
+ continue;
+ } else if (rec.type == 1) {
+ /*eof */
+ ok |= 4;
+ goto fw_end;
+ } else if (rec.type != 0) {
+ dev_alert(&card->pdev->dev, "unknown record type 0x%04x\n",
+ rec.type);
+ break;
+ }
+
+ if ((rec.addr + rec.len + offset) > size) {
+ dev_alert(&card->pdev->dev,
+ "firmware out of range (0x%08x / 0x%08x)\n",
+ (rec.addr + rec.len + offset), size);
+ goto fw_end;
+ }
+ memcpy_toio(&virt[rec.addr + offset],
+ rec.base, rec.len);
+ /* be sure to flush caches from IO space */
+ mb();
+ if (rec.len > sizeof(buf)) {
+ dev_info(&card->pdev->dev,
+ "record is big (%u bytes), not verifying\n",
+ rec.len);
+ continue;
+ }
+ /* verify record data */
+ memcpy_fromio(buf, &virt[rec.addr + offset], rec.len);
+ if (!memcmp(buf, rec.base, rec.len))
+ /* is ok */
+ continue;
+ dev_alert(&card->pdev->dev, "0x%08x:0x%03x at 0x%p failed\n",
+ rec.addr, rec.len, &virt[rec.addr + offset]);
+ goto fw_end;
+ }
+fw_end:
+ release_firmware(fw);
+ if (0x5 == (ok & 0x5))
+ /* got eof & start */
+ return 0;
+ dev_info(&card->pdev->dev, "firmware %s failed\n", file);
+ return ret ?: -EINVAL;
+}
+
+int softing_load_app_fw(const char *file, struct softing *card)
+{
+ const struct firmware *fw;
+ const unsigned char *mem;
+ const unsigned char *end;
+ int ret;
+ struct fw_hdr rec;
+ int ok = 0;
+ u32 start_addr = 0;
+ u16 rx_sum;
+ unsigned int sum;
+ const unsigned char *mem_lp;
+ const unsigned char *mem_end;
+ struct cpy {
+ u32 src;
+ u32 dst;
+ u16 len;
+ u8 do_cs;
+ } __attribute__((packed)) *pcpy =
+ (struct cpy *)&card->dpram.command[1];
+ struct cmd {
+ u32 start;
+ u8 autorestart;
+ } __attribute__((packed)) *pcmdstart =
+ (struct cmd *)&card->dpram.command[1];
+
+ ret = request_firmware(&fw, file, &card->pdev->dev);
+ if (ret) {
+ dev_alert(&card->pdev->dev, "request_firmware(%s) got %i\n",
+ file, ret);
+ return ret;
+ }
+ dev_dbg(&card->pdev->dev, "firmware(%s) got %lu bytes\n",
+ file, (unsigned long)fw->size);
+ /* parse the firmware */
+ mem = fw->data;
+ end = &mem[fw->size];
+ /* look for header record */
+ ret = fw_parse(&mem, &rec);
+ if (ret)
+ goto fw_end;
+ if (rec.type != 0xffff) {
+ dev_alert(&card->pdev->dev, "firware starts with type 0x%04x\n",
+ rec.type);
+ goto fw_end;
+ }
+ if (strncmp("Structured Binary Format, Softing GmbH"
+ , rec.base, rec.len)) {
+ dev_alert(&card->pdev->dev, "firware string '%.*s' fault\n",
+ rec.len, rec.base);
+ goto fw_end;
+ }
+ ok |= 1;
+ /* ok, we had a header */
+ while (mem < end) {
+ ret = fw_parse(&mem, &rec);
+ if (ret)
+ break;
+
+ if (rec.type == 3) {
+ /*start address */
+ start_addr = rec.addr;
+ ok |= 2;
+ continue;
+ } else if (rec.type == 1) {
+ /*eof */
+ ok |= 4;
+ goto fw_end;
+ } else if (rec.type != 0) {
+ dev_alert(&card->pdev->dev, "unknown record type 0x%04x\n",
+ rec.type);
+ break;
+ }
+ /* regualar data */
+ for (sum = 0, mem_lp = rec.base, mem_end = &mem_lp[rec.len];
+ mem_lp < mem_end; ++mem_lp)
+ sum += *mem_lp;
+
+ memcpy_toio(&card->dpram. virt[card->pdat->app.offs],
+ rec.base, rec.len);
+ pcpy->src = card->pdat->app.offs + card->pdat->app.addr;
+ pcpy->dst = rec.addr;
+ pcpy->len = rec.len;
+ pcpy->do_cs = 1;
+ if (softing_bootloader_command(card, 1, "loading app."))
+ goto fw_end;
+ /*verify checksum */
+ rx_sum = card->dpram.receipt[1];
+ if (rx_sum != (sum & 0xffff)) {
+ dev_alert(&card->pdev->dev, "SRAM seems to be damaged"
+ ", wanted 0x%04x, got 0x%04x\n", sum, rx_sum);
+ goto fw_end;
+ }
+ }
+fw_end:
+ release_firmware(fw);
+ if (ok != 7)
+ goto fw_failed;
+ /*got start, start_addr, & eof */
+ pcmdstart->start = start_addr;
+ pcmdstart->autorestart = 1;
+ if (softing_bootloader_command(card, 3, "start app."))
+ goto fw_failed;
+ dev_info(&card->pdev->dev, "firmware %s up\n", file);
+ return 0;
+fw_failed:
+ dev_info(&card->pdev->dev, "firmware %s failed\n", file);
+ return ret ?: -EINVAL;
+}
+
+int softing_reset_chip(struct softing *card)
+{
+ do {
+ /*reset chip */
+ card->dpram.info->reset_rcv_fifo = 0;
+ card->dpram.info->reset = 1;
+ if (!softing_fct_cmd(card, 0, 0, "reset_chip"))
+ break;
+ if (signal_pending(current))
+ goto failed;
+ /*sync */
+ if (softing_fct_cmd(card, 99, 0x55, "sync-a"))
+ goto failed;
+ if (softing_fct_cmd(card, 99, 0xaa, "sync-a"))
+ goto failed;
+ } while (1);
+ card->tx.pending = 0;
+ return 0;
+failed:
+ return -EIO;
+}
+
+static void softing_initialize_timestamp(struct softing *card)
+{
+ uint64_t ovf;
+
+ card->ts_ref = ktime_get();
+
+ /* 16MHz is the reference */
+ ovf = 0x100000000ULL * 16;
+ do_div(ovf, card->pdat->freq ?: 16);
+
+ card->ts_overflow = ktime_add_us(ktime_set(0, 0), ovf);
+}
+
+ktime_t softing_raw2ktime(struct softing *card, u32 raw)
+{
+ uint64_t rawl;
+ ktime_t now, real_offset;
+ ktime_t target;
+ ktime_t tmp;
+
+ now = ktime_get();
+ real_offset = ktime_sub(ktime_get_real(), now);
+
+ /* find nsec from card */
+ rawl = raw * 16;
+ do_div(rawl, card->pdat->freq ?: 16);
+ target = ktime_add_us(card->ts_ref, rawl);
+ /* test for overflows */
+ tmp = ktime_add(target, card->ts_overflow);
+ while (unlikely(ktime_to_ns(tmp) > ktime_to_ns(now))) {
+ card->ts_ref = ktime_add(card->ts_ref, card->ts_overflow);
+ target = tmp;
+ tmp = ktime_add(target, card->ts_overflow);
+ }
+ return ktime_add(target, real_offset);
+}
+
+static inline int softing_error_reporting(struct net_device *netdev)
+{
+ struct softing_priv *priv = netdev_priv(netdev);
+
+ return (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
+ ? 1 : 0;
+}
+
+int softing_startstop(struct net_device *dev, int up)
+{
+ int ret;
+ struct softing *card;
+ struct softing_priv *priv;
+ struct net_device *netdev;
+ int mask_start;
+ int j, error_reporting;
+ struct can_frame msg;
+
+ priv = netdev_priv(dev);
+ card = priv->card;
+
+ if (!card->fw.up)
+ return -EIO;
+
+ ret = mutex_lock_interruptible(&card->fw.lock);
+ if (ret)
+ return ret;
+
+ mask_start = 0;
+ if (dev && up)
+ /* prepare to start this bus as well */
+ mask_start |= (1 << priv->index);
+ /* bring netdevs down */
+ for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
+ netdev = card->net[j];
+ if (!netdev)
+ continue;
+ priv = netdev_priv(netdev);
+
+ if (dev != netdev)
+ netif_stop_queue(netdev);
+
+ if (netif_running(netdev)) {
+ if (dev != netdev)
+ mask_start |= (1 << j);
+ priv->tx.pending = 0;
+ priv->tx.echo_put = 0;
+ priv->tx.echo_get = 0;
+ /* this bus' may just have called open_candev()
+ * which is rather stupid to call close_candev()
+ * already
+ * but we may come here from busoff recovery too
+ * in which case the echo_skb _needs_ flushing too.
+ * just be sure to call open_candev() again
+ */
+ close_candev(netdev);
+ }
+ priv->can.state = CAN_STATE_STOPPED;
+ }
+ card->tx.pending = 0;
+
+ softing_enable_irq(card, 0);
+ ret = softing_reset_chip(card);
+ if (ret)
+ goto failed;
+ if (!mask_start)
+ /* no busses to be brought up */
+ goto card_done;
+
+ if ((mask_start & 1) && (mask_start & 2)
+ && (softing_error_reporting(card->net[0])
+ != softing_error_reporting(card->net[1]))) {
+ dev_alert(&card->pdev->dev,
+ "err_reporting flag differs for busses\n");
+ goto invalid;
+ }
+ error_reporting = 0;
+ if (mask_start & 1) {
+ netdev = card->net[0];
+ priv = netdev_priv(netdev);
+ error_reporting += softing_error_reporting(netdev);
+ /*init chip 1 */
+ card->dpram.fct->param[1] = priv->can.bittiming.brp;
+ card->dpram.fct->param[2] = priv->can.bittiming.sjw;
+ card->dpram.fct->param[3] =
+ priv->can.bittiming.phase_seg1 +
+ priv->can.bittiming.prop_seg;
+ card->dpram.fct->param[4] =
+ priv->can.bittiming.phase_seg2;
+ card->dpram.fct->param[5] = (priv->can.ctrlmode &
+ CAN_CTRLMODE_3_SAMPLES) ? 1 : 0;
+ if (softing_fct_cmd(card, 1, 0, "initialize_chip[0]"))
+ goto failed;
+ /*set mode */
+ card->dpram.fct->param[1] = 0;
+ card->dpram.fct->param[2] = 0;
+ if (softing_fct_cmd(card, 3, 0, "set_mode[0]"))
+ goto failed;
+ /*set filter */
+ card->dpram.fct->param[1] = 0x0000;/*card->bus[0].s.msg; */
+ card->dpram.fct->param[2] = 0x07ff;/*card->bus[0].s.msk; */
+ card->dpram.fct->param[3] = 0x0000;/*card->bus[0].l.msg; */
+ card->dpram.fct->param[4] = 0xffff;/*card->bus[0].l.msk; */
+ card->dpram.fct->param[5] = 0x0000;/*card->bus[0].l.msg >> 16;*/
+ card->dpram.fct->param[6] = 0x1fff;/*card->bus[0].l.msk >> 16;*/
+ if (softing_fct_cmd(card, 7, 0, "set_filter[0]"))
+ goto failed;
+ /*set output control */
+ card->dpram.fct->param[1] = priv->output;
+ if (softing_fct_cmd(card, 5, 0, "set_output[0]"))
+ goto failed;
+ }
+ if (mask_start & 2) {
+ netdev = card->net[1];
+ priv = netdev_priv(netdev);
+ error_reporting += softing_error_reporting(netdev);
+ /*init chip2 */
+ card->dpram.fct->param[1] = priv->can.bittiming.brp;
+ card->dpram.fct->param[2] = priv->can.bittiming.sjw;
+ card->dpram.fct->param[3] =
+ priv->can.bittiming.phase_seg1 +
+ priv->can.bittiming.prop_seg;
+ card->dpram.fct->param[4] =
+ priv->can.bittiming.phase_seg2;
+ card->dpram.fct->param[5] = (priv->can.ctrlmode &
+ CAN_CTRLMODE_3_SAMPLES) ? 1 : 0;
+ if (softing_fct_cmd(card, 2, 0, "initialize_chip[1]"))
+ goto failed;
+ /*set mode2 */
+ card->dpram.fct->param[1] = 0;
+ card->dpram.fct->param[2] = 0;
+ if (softing_fct_cmd(card, 4, 0, "set_mode[1]"))
+ goto failed;
+ /*set filter2 */
+ card->dpram.fct->param[1] = 0x0000;/*card->bus[1].s.msg; */
+ card->dpram.fct->param[2] = 0x07ff;/*card->bus[1].s.msk; */
+ card->dpram.fct->param[3] = 0x0000;/*card->bus[1].l.msg; */
+ card->dpram.fct->param[4] = 0xffff;/*card->bus[1].l.msk; */
+ card->dpram.fct->param[5] = 0x0000;/*card->bus[1].l.msg >> 16;*/
+ card->dpram.fct->param[6] = 0x1fff;/*card->bus[1].l.msk >> 16;*/
+ if (softing_fct_cmd(card, 8, 0, "set_filter[1]"))
+ goto failed;
+ /*set output control2 */
+ card->dpram.fct->param[1] = priv->output;
+ if (softing_fct_cmd(card, 6, 0, "set_output[1]"))
+ goto failed;
+ }
+ /*enable_error_frame */
+ if (error_reporting) {
+ if (softing_fct_cmd(card, 51, 0, "enable_error_frame"))
+ goto failed;
+ }
+ /*initialize interface */
+ card->dpram.fct->param[1] = 1;
+ card->dpram.fct->param[2] = 1;
+ card->dpram.fct->param[3] = 1;
+ card->dpram.fct->param[4] = 1;
+ card->dpram.fct->param[5] = 1;
+ card->dpram.fct->param[6] = 1;
+ card->dpram.fct->param[7] = 1;
+ card->dpram.fct->param[8] = 1;
+ card->dpram.fct->param[9] = 1;
+ card->dpram.fct->param[10] = 1;
+ if (softing_fct_cmd(card, 17, 0, "initialize_interface"))
+ goto failed;
+ /*enable_fifo */
+ if (softing_fct_cmd(card, 36, 0, "enable_fifo"))
+ goto failed;
+ /*enable fifo tx ack */
+ if (softing_fct_cmd(card, 13, 0, "fifo_tx_ack[0]"))
+ goto failed;
+ /*enable fifo tx ack2 */
+ if (softing_fct_cmd(card, 14, 0, "fifo_tx_ack[1]"))
+ goto failed;
+ /*enable timestamps */
+ /*is default, no code found */
+ /*start_chip */
+ if (softing_fct_cmd(card, 11, 0, "start_chip"))
+ goto failed;
+ card->dpram.info->bus_state = 0;
+ card->dpram.info->bus_state2 = 0;
+ dev_info(&card->pdev->dev, "%s up\n", __func__);
+ if (card->pdat->generation < 2) {
+ card->dpram.irq->to_host = 0;
+ /* flush the DPRAM caches */
+ wmb();
+ }
+
+ softing_initialize_timestamp(card);
+
+ /*
+ * do socketcan notifications/status changes
+ * from here, no errors should occur, or the failed: part
+ * must be reviewed
+ */
+ memset(&msg, 0, sizeof(msg));
+ msg.can_id = CAN_ERR_FLAG | CAN_ERR_RESTARTED;
+ msg.can_dlc = CAN_ERR_DLC;
+ for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
+ if (!(mask_start & (1 << j)))
+ continue;
+ netdev = card->net[j];
+ if (!netdev)
+ continue;
+ priv = netdev_priv(netdev);
+ priv->can.state = CAN_STATE_ERROR_ACTIVE;
+ open_candev(netdev);
+ if (dev != netdev) {
+ /* notify other busses on the restart */
+ softing_netdev_rx(netdev, &msg, ktime_set(0, 0));
+ ++priv->can.can_stats.restarts;
+ }
+ netif_wake_queue(netdev);
+ }
+
+ /* enable interrupts */
+ ret = softing_enable_irq(card, 1);
+ if (ret)
+ goto failed;
+card_done:
+ mutex_unlock(&card->fw.lock);
+ return 0;
+failed:
+ dev_alert(&card->pdev->dev, "firmware failed, going idle\n");
+invalid:
+ softing_enable_irq(card, 0);
+ softing_reset_chip(card);
+ mutex_unlock(&card->fw.lock);
+ /* bring all other interfaces down */
+ for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
+ netdev = card->net[j];
+ if (!netdev)
+ continue;
+ dev_close(netdev);
+ }
+ return -EIO;
+}
+
+int softing_default_output(struct net_device *netdev)
+{
+ struct softing_priv *priv = netdev_priv(netdev);
+ struct softing *card = priv->card;
+
+ switch (priv->chip) {
+ case 1000:
+ if (card->pdat->generation < 2)
+ return 0xfb;
+ return 0xfa;
+ case 5:
+ return 0x60;
+ default:
+ return 0x40;
+ }
+}
+
diff --git a/drivers/net/can/softing/softing_main.c b/drivers/net/can/softing/softing_main.c
new file mode 100644
index 0000000..a3d94d4
--- /dev/null
+++ b/drivers/net/can/softing/softing_main.c
@@ -0,0 +1,935 @@
+/*
+* drivers/net/can/softing/softing_main.c
+*
+* 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, write to the Free Software
+* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+
+#include "softing.h"
+
+#define TX_ECHO_SKB_MAX (TXMAX/2)
+
+/*
+ * 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);
+}
+
+/* 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;
+ int bhlock;
+ u8 *ptr;
+ u8 cmd;
+ unsigned int fifo_wr;
+ struct can_frame msg;
+
+ if (can_dropped_invalid_skb(dev, skb))
+ return NETDEV_TX_OK;
+
+ if (in_interrupt()) {
+ bhlock = 0;
+ spin_lock(&card->spin);
+ } else {
+ bhlock = 1;
+ spin_lock_bh(&card->spin);
+ }
+ ret = NETDEV_TX_BUSY;
+ if (!card->fw.up)
+ goto xmit_done;
+ if (card->tx.pending >= TXMAX)
+ goto xmit_done;
+ if (priv->tx.pending >= TX_ECHO_SKB_MAX)
+ goto xmit_done;
+ fifo_wr = card->dpram.tx->wr;
+ if (fifo_wr == card->dpram.tx->rd)
+ /*fifo full */
+ goto xmit_done;
+ memcpy(&msg, skb->data, sizeof(msg));
+ ptr = &card->dpram.tx->fifo[fifo_wr][0];
+ cmd = CMD_TX;
+ if (msg.can_id & CAN_RTR_FLAG)
+ cmd |= CMD_RTR;
+ if (msg.can_id & CAN_EFF_FLAG)
+ cmd |= CMD_XTD;
+ if (priv->index)
+ cmd |= CMD_BUS2;
+ *ptr++ = cmd;
+ *ptr++ = msg.can_dlc;
+ *ptr++ = (msg.can_id >> 0);
+ *ptr++ = (msg.can_id >> 8);
+ if (msg.can_id & CAN_EFF_FLAG) {
+ *ptr++ = (msg.can_id >> 16);
+ *ptr++ = (msg.can_id >> 24);
+ } else {
+ /*increment 1, not 2 as you might think */
+ ptr += 1;
+ }
+ if (!(msg.can_id & CAN_RTR_FLAG))
+ memcpy_toio(ptr, &msg.data[0], msg.can_dlc);
+ if (++fifo_wr >=
+ sizeof(card->dpram.tx->fifo) /
+ sizeof(card->dpram.tx->fifo[0]))
+ fifo_wr = 0;
+ card->dpram.tx->wr = fifo_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:
+ if (bhlock)
+ spin_unlock_bh(&card->spin);
+ else
+ 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;
+ int ret;
+
+ skb = alloc_can_skb(netdev, &cf);
+ if (!skb)
+ return -ENOMEM;
+ memcpy(cf, msg, sizeof(*msg));
+ skb->tstamp = ktime;
+ ret = netif_rx(skb);
+ if (ret == NET_RX_DROP)
+ ++netdev->stats.rx_dropped;
+ return ret;
+}
+
+/*
+ * softing_handle_1
+ * pop 1 entry from the DPRAM queue, and process
+ */
+static int softing_handle_1(struct softing *card)
+{
+ int j;
+ struct net_device *netdev;
+ struct softing_priv *priv;
+ ktime_t ktime;
+ struct can_frame msg;
+
+ unsigned int fifo_rd;
+ unsigned int cnt = 0;
+ u8 *ptr;
+ u32 tmp;
+ u8 cmd;
+
+ memset(&msg, 0, sizeof(msg));
+ if (card->dpram.rx->lost_msg) {
+ /*reset condition */
+ card->dpram.rx->lost_msg = 0;
+ /* 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, ktime_set(0, 0));
+ }
+ /* prepare for other use */
+ memset(&msg, 0, sizeof(msg));
+ ++cnt;
+ }
+
+ fifo_rd = card->dpram.rx->rd;
+ if (++fifo_rd >= ARRAY_SIZE(card->dpram.rx->fifo))
+ fifo_rd = 0;
+
+ if (card->dpram.rx->wr == fifo_rd)
+ return cnt;
+
+ ptr = &card->dpram.rx->fifo[fifo_rd][0];
+
+ cmd = *ptr++;
+ if (cmd == 0xff) {
+ /*not quite usefull, probably the card has got out */
+ dev_alert(&card->pdev->dev, "got cmd 0x%02x,"
+ " I suspect the card is lost\n", cmd);
+ }
+ /*mod_trace("0x%02x", cmd);*/
+ netdev = card->net[0];
+ if (cmd & CMD_BUS2)
+ netdev = card->net[1];
+ priv = netdev_priv(netdev);
+
+ if (cmd & CMD_ERR) {
+ u8 can_state;
+ u8 state;
+ state = *ptr++;
+
+ msg.can_id = CAN_ERR_FLAG;
+ msg.can_dlc = CAN_ERR_DLC;
+
+ if (state & 0x80) {
+ can_state = CAN_STATE_BUS_OFF;
+ msg.can_id |= CAN_ERR_BUSOFF;
+ state = 2;
+ } else if (state & 0x60) {
+ can_state = CAN_STATE_ERROR_PASSIVE;
+ msg.can_id |= CAN_ERR_BUSERROR;
+ msg.data[1] = CAN_ERR_CRTL_TX_PASSIVE;
+ state = 1;
+ } else {
+ can_state = CAN_STATE_ERROR_ACTIVE;
+ state = 0;
+ msg.can_id |= CAN_ERR_BUSERROR;
+ }
+ /*update DPRAM */
+ if (!priv->index)
+ card->dpram.info->bus_state = state;
+ else
+ card->dpram.info->bus_state2 = state;
+ /*timestamp */
+ tmp = (ptr[0] << 0) | (ptr[1] << 8)
+ | (ptr[2] << 16) | (ptr[3] << 24);
+ ptr += 4;
+ ktime = softing_raw2ktime(card, tmp);
+ /*trigger dual port RAM */
+ mb();
+ card->dpram.rx->rd = fifo_rd;
+
+ ++priv->can.can_stats.bus_error;
+ ++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;
+ if (can_state == CAN_STATE_BUS_OFF) {
+ /* this calls can_close_cleanup() */
+ 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;
+ /* acknowledge, was tx msg
+ * no real tx flag to set
+ if (cmd & CMD_ACK) {
+ }
+ */
+ msg.can_dlc = get_can_dlc(*ptr++);
+ if (cmd & CMD_XTD) {
+ msg.can_id |= CAN_EFF_FLAG;
+ msg.can_id |= (ptr[0] << 0) | (ptr[1] << 8)
+ | (ptr[2] << 16) | (ptr[3] << 24);
+ ptr += 4;
+ } else {
+ msg.can_id |= (ptr[0] << 0) | (ptr[1] << 8);
+ ptr += 2;
+ }
+ tmp = (ptr[0] << 0) | (ptr[1] << 8)
+ | (ptr[2] << 16) | (ptr[3] << 24);
+ ptr += 4;
+ ktime = softing_raw2ktime(card, tmp);
+ memcpy_fromio(&msg.data[0], ptr, 8);
+ ptr += 8;
+ /*trigger dual port RAM */
+ mb();
+ card->dpram.rx->rd = fifo_rd;
+ /*update socket */
+ if (cmd & CMD_ACK) {
+ 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;
+ netdev->stats.tx_bytes += msg.can_dlc;
+ } else {
+ ++netdev->stats.rx_packets;
+ netdev->stats.rx_bytes += msg.can_dlc;
+ softing_netdev_rx(netdev, &msg, ktime);
+ }
+ }
+ ++cnt;
+ return cnt;
+}
+
+/*
+ * real interrupt handler
+ */
+static void softing_handler(unsigned long param)
+{
+ struct softing *card = (struct softing *)param;
+ struct net_device *netdev;
+ struct softing_priv *priv;
+ int j;
+ int offset;
+
+ spin_lock(&card->spin);
+ while (softing_handle_1(card) > 0)
+ ++card->irq.svc_count;
+ spin_unlock(&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;
+ netif_wake_queue(netdev);
+ }
+}
+
+/*
+ * interrupt routines:
+ * schedule the 'real interrupt handler'
+ */
+static
+irqreturn_t softing_irq_new(int irq, void *dev_id)
+{
+ struct softing *card = (struct softing *)dev_id;
+ unsigned char ir;
+ ir = card->dpram.virt[0xe02];
+ card->dpram.virt[0xe02] = 0;
+ if (card->dpram.rx->rd == 0xffff) {
+ dev_alert(&card->pdev->dev, "I think the card is gone\n");
+ return IRQ_NONE;
+ }
+ if (ir == 1) {
+ tasklet_schedule(&card->irq.bh);
+ return IRQ_HANDLED;
+ } else if (ir == 0x10) {
+ return IRQ_NONE;
+ } else {
+ return IRQ_NONE;
+ }
+}
+
+static
+irqreturn_t softing_irq_old(int irq, void *dev_id)
+{
+ struct softing *card = (struct softing *)dev_id;
+ unsigned char irq_host;
+ irq_host = card->dpram.irq->to_host;
+ /* make sure we have a copy, before clearing the variable in DPRAM */
+ rmb();
+ card->dpram.irq->to_host = 0;
+ /* make sure we cleared it */
+ wmb();
+ if (card->dpram.rx->rd == 0xffff) {
+ dev_alert(&card->pdev->dev, "I think the card is gone\n");
+ return IRQ_NONE;
+ }
+ tasklet_schedule(&card->irq.bh);
+ return IRQ_HANDLED;
+}
+
+/*
+ * 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)
+ goto failed;
+ ret = softing_startstop(ndev, 1);
+ if (ret)
+ goto failed;
+ return 0;
+failed:
+ 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 cycle 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 (!enable) {
+ if (card->irq.requested && card->irq.nr) {
+ free_irq(card->irq.nr, card);
+ card->irq.requested = 0;
+ }
+ return 0;
+ }
+ if (!card->irq.requested && (card->irq.nr)) {
+ ret = request_irq(card->irq.nr,
+ (card->pdat->generation >= 2)
+ ? softing_irq_new : softing_irq_old,
+ IRQF_SHARED, dev_name(&card->pdev->dev), card);
+ if (ret) {
+ dev_alert(&card->pdev->dev, "%s, request_irq(%u) failed\n",
+ card->pdat->name, card->irq.nr);
+ return ret;
+ }
+ card->irq.requested = 1;
+ }
+ return 0;
+}
+
+static void softing_card_shutdown(struct softing *card)
+{
+ int fw_up = 0;
+ dev_dbg(&card->pdev->dev, "%s()\n", __func__);
+ 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);
+ tasklet_kill(&card->irq.bh);
+}
+
+static int softing_card_boot(struct softing *card)
+{
+ unsigned char *lp;
+ static const unsigned char stream[] = {
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, };
+ unsigned char back[sizeof(stream)];
+ dev_dbg(&card->pdev->dev, "%s()\n", __func__);
+
+ 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 (lp = card->dpram.virt; &lp[sizeof(stream)] <= card->dpram.end;
+ lp += sizeof(stream)) {
+
+ memcpy_toio(lp, stream, sizeof(stream));
+ /* flush IO cache */
+ mb();
+ memcpy_fromio(back, lp, sizeof(stream));
+
+ if (!memcmp(back, stream, sizeof(stream)))
+ continue;
+ /* memory is not equal */
+ dev_alert(&card->pdev->dev, "write to dpram failed at 0x%04lx\n",
+ (unsigned long)(lp - card->dpram.virt));
+ goto open_failed;
+ }
+ wmb();
+ /*load boot firmware */
+ if (softing_load_fw(card->pdat->boot.fw, card, card->dpram.virt,
+ card->dpram.size,
+ card->pdat->boot.offs -
+ card->pdat->boot.addr))
+ goto open_failed;
+ /*load load firmware */
+ if (softing_load_fw(card->pdat->load.fw, card, card->dpram.virt,
+ card->dpram.size,
+ card->pdat->load.offs -
+ card->pdat->load.addr))
+ goto open_failed;
+
+ if (card->pdat->reset)
+ card->pdat->reset(card->pdev, 0);
+ softing_clr_reset_dpram(card);
+ if (softing_bootloader_command(card, 0, "card boot"))
+ goto open_failed;
+ if (softing_load_app_fw(card->pdat->app.fw, card))
+ goto open_failed;
+ /*reset chip */
+ card->dpram.info->reset_rcv_fifo = 0;
+ card->dpram.info->reset = 1;
+ /*sync */
+ if (softing_fct_cmd(card, 99, 0x55, "sync-a"))
+ goto open_failed;
+ if (softing_fct_cmd(card, 99, 0xaa, "sync-a"))
+ goto open_failed;
+ /*reset chip */
+ if (softing_fct_cmd(card, 0, 0, "reset_chip"))
+ goto open_failed;
+ /*get_serial */
+ if (softing_fct_cmd(card, 43, 0, "get_serial_number"))
+ goto open_failed;
+ card->id.serial =
+ (u16) card->dpram.fct->param[1] +
+ (((u16) card->dpram.fct->param[2]) << 16);
+ /*get_version */
+ if (softing_fct_cmd(card, 12, 0, "get_version"))
+ goto open_failed;
+ card->id.fw = (u16) card->dpram.fct->param[1];
+ card->id.hw = (u16) card->dpram.fct->param[2];
+ card->id.lic = (u16) card->dpram.fct->param[3];
+ card->id.chip[0] = (u16) card->dpram.fct->param[4];
+ card->id.chip[1] = (u16) card->dpram.fct->param[5];
+
+ dev_info(&card->pdev->dev, "card booted, type %s, "
+ "serial %u, fw %u, hw %u, lic %u, chip (%u,%u)\n",
+ card->pdat->name, card->id.serial, card->id.fw, card->id.hw,
+ card->id.lic, card->id.chip[0], card->id.chip[1]);
+
+ card->fw.up = 1;
+ mutex_unlock(&card->fw.lock);
+ return 0;
+open_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 -EIO;
+}
+
+/*
+ * netdev sysfs
+ */
+static ssize_t show_channel(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->index);
+}
+
+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 = strict_strtoul(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(channel, S_IRUGO, show_channel, 0);
+static const DEVICE_ATTR(chip, S_IRUGO, show_chip, 0);
+static const DEVICE_ATTR(output, S_IRUGO | S_IWUSR, show_output, store_output);
+
+static const struct attribute *const netdev_sysfs_attrs[] = {
+ &dev_attr_channel.attr,
+ &dev_attr_chip.attr,
+ &dev_attr_output.attr,
+ 0,
+};
+static const struct attribute_group netdev_sysfs_group = {
+ .name = 0,
+ .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,
+};
+
+static const struct can_bittiming_const softing_btr_const = {
+ .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, u16 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 0;
+ }
+ 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 |
+ CAN_CTRLMODE_BERR_REPORTING;
+
+ return netdev;
+}
+
+static int softing_netdev_register(struct net_device *netdev)
+{
+ int ret;
+
+ /*
+ * provide bus-specific sysfs attributes _during_ the uevent
+ */
+ netdev->sysfs_groups[0] = &netdev_sysfs_group;
+ ret = register_candev(netdev);
+ if (ret) {
+ dev_alert(&netdev->dev, "register failed\n");
+ return ret;
+ }
+ return 0;
+}
+
+static void softing_netdev_cleanup(struct net_device *netdev)
+{
+ 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, 0)
+
+DEV_ATTR_RO(serial , id.serial);
+DEV_ATTR_RO(firmware , id.fw);
+DEV_ATTR_RO(hardware , id.hw);
+DEV_ATTR_RO(license , id.lic);
+DEV_ATTR_RO(freq , id.freq);
+DEV_ATTR_RO(txpending , tx.pending);
+
+static struct attribute *softing_pdev_attrs[] = {
+ &dev_attr_serial.attr,
+ &dev_attr_firmware.attr,
+ &dev_attr_hardware.attr,
+ &dev_attr_license.attr,
+ &dev_attr_freq.attr,
+ &dev_attr_txpending.attr,
+ 0,
+};
+
+static const struct attribute_group softing_pdev_group = {
+ .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);
+ tasklet_kill(&card->irq.bh);
+
+ for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
+ if (!card->net[j])
+ continue;
+ softing_netdev_cleanup(card->net[j]);
+ card->net[j] = 0;
+ }
+ sysfs_remove_group(&pdev->dev.kobj, &softing_pdev_group);
+
+ iounmap(card->dpram.virt);
+ kfree(card);
+ return 0;
+}
+
+static int softing_pdev_probe(struct platform_device *pdev)
+{
+ const struct softing_platform_data *pdat = pdev->dev.platform_data;
+ 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);
+ /* try_module_get(THIS_MODULE); */
+ mutex_init(&card->fw.lock);
+ spin_lock_init(&card->spin);
+ tasklet_init(&card->irq.bh, softing_handler, (unsigned long)card);
+
+ ret = -EINVAL;
+ pres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!pres)
+ goto ioremap_failed;
+ card->dpram.phys = pres->start;
+ card->dpram.size = pres->end - pres->start + 1;
+ card->dpram.virt = ioremap_nocache(card->dpram.phys, card->dpram.size);
+ if (!card->dpram.virt) {
+ dev_alert(&card->pdev->dev, "dpram ioremap failed\n");
+ goto ioremap_failed;
+ }
+ card->dpram.end = &card->dpram.virt[card->dpram.size];
+ /*initialize_board */
+ card->dpram.rx = (struct softing_rx *)&card->dpram.virt[0x0000];
+ card->dpram.tx = (struct softing_tx *)&card->dpram.virt[0x0400];
+ card->dpram.fct = (struct softing_fct *)&card->dpram.virt[0x0300];
+ card->dpram.info = (struct softing_info *)&card->dpram.virt[0x0330];
+ card->dpram.command = (unsigned short *)&card->dpram.virt[0x07e0];
+ card->dpram.receipt = (unsigned short *)&card->dpram.virt[0x07f0];
+ card->dpram.irq = (struct softing_irq *)&card->dpram.virt[0x07fe];
+
+ pres = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (pres)
+ card->irq.nr = pres->start;
+
+ /*reset card */
+ ret = -EIO;
+ if (softing_card_boot(card)) {
+ dev_alert(&pdev->dev, "failed to boot\n");
+ goto boot_failed;
+ }
+
+ /*only now, the chip's are known */
+ card->id.freq = card->pdat->freq * 1000000UL;
+
+ ret = sysfs_create_group(&pdev->dev.kobj, &softing_pdev_group);
+ if (ret < 0) {
+ dev_alert(&card->pdev->dev, "sysfs failed\n");
+ goto sysfs_failed;
+ }
+
+ ret = -ENOMEM;
+ 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);
+ goto netdev_failed;
+ }
+ priv = netdev_priv(card->net[j]);
+ priv->index = j;
+ ret = softing_netdev_register(netdev);
+ if (ret) {
+ free_candev(netdev);
+ card->net[j] = 0;
+ dev_alert(&card->pdev->dev,
+ "failed to register can[%i]\n", j);
+ goto netdev_failed;
+ }
+ }
+ dev_info(&card->pdev->dev, "card initialised\n");
+ 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.virt);
+ioremap_failed:
+ tasklet_kill(&card->irq.bh);
+ kfree(card);
+ return ret;
+}
+
+static struct platform_driver softing_driver = {
+ .driver = {
+ .name = "softing",
+ .owner = THIS_MODULE,
+ },
+ .probe = softing_pdev_probe,
+ .remove = softing_pdev_remove,
+};
+
+MODULE_ALIAS("platform:softing");
+
+static int __init softing_start(void)
+{
+ return platform_driver_register(&softing_driver);
+}
+
+static void __exit softing_stop(void)
+{
+ platform_driver_unregister(&softing_driver);
+}
+
+module_init(softing_start);
+module_exit(softing_stop);
+
+MODULE_DESCRIPTION("socketcan softing driver");
+MODULE_AUTHOR("Kurt Van Dijck <kurt.van.dijck@....be>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/can/softing/softing_platform.h b/drivers/net/can/softing/softing_platform.h
new file mode 100644
index 0000000..9ff69a1
--- /dev/null
+++ b/drivers/net/can/softing/softing_platform.h
@@ -0,0 +1,38 @@
+
+#include <linux/platform_device.h>
+
+#ifndef _SOFTING_DEVICE_H_
+#define _SOFTING_DEVICE_H_
+
+/* softing firmware directory prefix */
+#define fw_dir "softing-4.6/"
+
+struct softing_platform_data {
+ unsigned int manf;
+ unsigned int prod;
+ /* generation
+ * 1st with NEC or SJA1000
+ * 8bit, exclusive interrupt, ...
+ * 2nd only SJA11000
+ * 16bit, shared interrupt
+ */
+ int generation;
+ int nbus; /* # busses on device */
+ unsigned int freq; /* crystal in MHz */
+ unsigned int max_brp;
+ unsigned int max_sjw;
+ unsigned long dpram_size;
+ char name[32];
+ struct {
+ unsigned long offs;
+ unsigned long addr;
+ const char *fw;
+ } boot, load, app;
+ /* reset() function, bring pdev in or out of reset, depending on
+ value */
+ int (*reset)(struct platform_device *pdev, int value);
+ int (*enable_irq)(struct platform_device *pdev, int value);
+};
+
+#endif
+
--
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