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@eia.be> Acked-by: Wolfgang Grandegger <wg@grandegger.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
2221eca0a2
commit
03fd3cf5a1
|
@ -117,6 +117,8 @@ source "drivers/net/can/sja1000/Kconfig"
|
||||||
|
|
||||||
source "drivers/net/can/usb/Kconfig"
|
source "drivers/net/can/usb/Kconfig"
|
||||||
|
|
||||||
|
source "drivers/net/can/softing/Kconfig"
|
||||||
|
|
||||||
config CAN_DEBUG_DEVICES
|
config CAN_DEBUG_DEVICES
|
||||||
bool "CAN devices debugging messages"
|
bool "CAN devices debugging messages"
|
||||||
depends on CAN
|
depends on CAN
|
||||||
|
|
|
@ -9,6 +9,7 @@ obj-$(CONFIG_CAN_DEV) += can-dev.o
|
||||||
can-dev-y := dev.o
|
can-dev-y := dev.o
|
||||||
|
|
||||||
obj-y += usb/
|
obj-y += usb/
|
||||||
|
obj-y += softing/
|
||||||
|
|
||||||
obj-$(CONFIG_CAN_SJA1000) += sja1000/
|
obj-$(CONFIG_CAN_SJA1000) += sja1000/
|
||||||
obj-$(CONFIG_CAN_MSCAN) += mscan/
|
obj-$(CONFIG_CAN_MSCAN) += mscan/
|
||||||
|
|
16
drivers/net/can/softing/Kconfig
Normal file
16
drivers/net/can/softing/Kconfig
Normal file
|
@ -0,0 +1,16 @@
|
||||||
|
config CAN_SOFTING
|
||||||
|
tristate "Softing Gmbh CAN generic support"
|
||||||
|
depends on CAN_DEV
|
||||||
|
---help---
|
||||||
|
Support for CAN cards from Softing Gmbh & some cards
|
||||||
|
from Vector Gmbh.
|
||||||
|
Softing Gmbh CAN cards come with 1 or 2 physical busses.
|
||||||
|
Those cards typically use Dual Port RAM to communicate
|
||||||
|
with the host CPU. The interface is then identical for PCI
|
||||||
|
and PCMCIA cards. This driver operates on a platform device,
|
||||||
|
which has been created by softing_cs or softing_pci driver.
|
||||||
|
Warning:
|
||||||
|
The API of the card does not allow fine control per bus, but
|
||||||
|
controls the 2 busses on the card together.
|
||||||
|
As such, some actions (start/stop/busoff recovery) on 1 bus
|
||||||
|
must bring down the other bus too temporarily.
|
5
drivers/net/can/softing/Makefile
Normal file
5
drivers/net/can/softing/Makefile
Normal file
|
@ -0,0 +1,5 @@
|
||||||
|
|
||||||
|
softing-y := softing_main.o softing_fw.o
|
||||||
|
obj-$(CONFIG_CAN_SOFTING) += softing.o
|
||||||
|
|
||||||
|
ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG
|
167
drivers/net/can/softing/softing.h
Normal file
167
drivers/net/can/softing/softing.h
Normal file
|
@ -0,0 +1,167 @@
|
||||||
|
/*
|
||||||
|
* softing common interfaces
|
||||||
|
*
|
||||||
|
* by Kurt Van Dijck, 2008-2010
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <linux/atomic.h>
|
||||||
|
#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"
|
||||||
|
|
||||||
|
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;
|
||||||
|
uint8_t output;
|
||||||
|
uint16_t 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;
|
||||||
|
int svc_count;
|
||||||
|
unsigned int dpram_position;
|
||||||
|
} 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;
|
||||||
|
__iomem uint8_t *dpram;
|
||||||
|
unsigned long dpram_phys;
|
||||||
|
unsigned long dpram_size;
|
||||||
|
struct {
|
||||||
|
uint16_t fw_version, hw_version, license, serial;
|
||||||
|
uint16_t chip[2];
|
||||||
|
unsigned int freq; /* remote cpu's operating frequency */
|
||||||
|
} id;
|
||||||
|
};
|
||||||
|
|
||||||
|
extern int softing_default_output(struct net_device *netdev);
|
||||||
|
|
||||||
|
extern ktime_t softing_raw2ktime(struct softing *card, u32 raw);
|
||||||
|
|
||||||
|
extern int softing_chip_poweron(struct softing *card);
|
||||||
|
|
||||||
|
extern int softing_bootloader_command(struct softing *card, int16_t cmd,
|
||||||
|
const char *msg);
|
||||||
|
|
||||||
|
/* Load firmware after reset */
|
||||||
|
extern int softing_load_fw(const char *file, struct softing *card,
|
||||||
|
__iomem uint8_t *virt, unsigned int size, int offset);
|
||||||
|
|
||||||
|
/* Load final application firmware after bootloader */
|
||||||
|
extern int softing_load_app_fw(const char *file, 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 */
|
||||||
|
#define DPRAM_RX 0x0000
|
||||||
|
#define DPRAM_RX_SIZE 32
|
||||||
|
#define DPRAM_RX_CNT 16
|
||||||
|
#define DPRAM_RX_RD 0x0201 /* uint8_t */
|
||||||
|
#define DPRAM_RX_WR 0x0205 /* uint8_t */
|
||||||
|
#define DPRAM_RX_LOST 0x0207 /* uint8_t */
|
||||||
|
|
||||||
|
#define DPRAM_FCT_PARAM 0x0300 /* int16_t [20] */
|
||||||
|
#define DPRAM_FCT_RESULT 0x0328 /* int16_t */
|
||||||
|
#define DPRAM_FCT_HOST 0x032b /* uint16_t */
|
||||||
|
|
||||||
|
#define DPRAM_INFO_BUSSTATE 0x0331 /* uint16_t */
|
||||||
|
#define DPRAM_INFO_BUSSTATE2 0x0335 /* uint16_t */
|
||||||
|
#define DPRAM_INFO_ERRSTATE 0x0339 /* uint16_t */
|
||||||
|
#define DPRAM_INFO_ERRSTATE2 0x033d /* uint16_t */
|
||||||
|
#define DPRAM_RESET 0x0341 /* uint16_t */
|
||||||
|
#define DPRAM_CLR_RECV_FIFO 0x0345 /* uint16_t */
|
||||||
|
#define DPRAM_RESET_TIME 0x034d /* uint16_t */
|
||||||
|
#define DPRAM_TIME 0x0350 /* uint64_t */
|
||||||
|
#define DPRAM_WR_START 0x0358 /* uint8_t */
|
||||||
|
#define DPRAM_WR_END 0x0359 /* uint8_t */
|
||||||
|
#define DPRAM_RESET_RX_FIFO 0x0361 /* uint16_t */
|
||||||
|
#define DPRAM_RESET_TX_FIFO 0x0364 /* uint8_t */
|
||||||
|
#define DPRAM_READ_FIFO_LEVEL 0x0365 /* uint8_t */
|
||||||
|
#define DPRAM_RX_FIFO_LEVEL 0x0366 /* uint16_t */
|
||||||
|
#define DPRAM_TX_FIFO_LEVEL 0x0366 /* uint16_t */
|
||||||
|
|
||||||
|
#define DPRAM_TX 0x0400 /* uint16_t */
|
||||||
|
#define DPRAM_TX_SIZE 16
|
||||||
|
#define DPRAM_TX_CNT 32
|
||||||
|
#define DPRAM_TX_RD 0x0601 /* uint8_t */
|
||||||
|
#define DPRAM_TX_WR 0x0605 /* uint8_t */
|
||||||
|
|
||||||
|
#define DPRAM_COMMAND 0x07e0 /* uint16_t */
|
||||||
|
#define DPRAM_RECEIPT 0x07f0 /* uint16_t */
|
||||||
|
#define DPRAM_IRQ_TOHOST 0x07fe /* uint8_t */
|
||||||
|
#define DPRAM_IRQ_TOCARD 0x07ff /* uint8_t */
|
||||||
|
|
||||||
|
#define DPRAM_V2_RESET 0x0e00 /* uint8_t */
|
||||||
|
#define DPRAM_V2_IRQ_TOHOST 0x0e02 /* uint8_t */
|
||||||
|
|
||||||
|
#define TXMAX (DPRAM_TX_CNT - 1)
|
||||||
|
|
||||||
|
/* 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
|
||||||
|
|
||||||
|
/* returned fifo entry bus state masks */
|
||||||
|
#define SF_MASK_BUSOFF 0x80
|
||||||
|
#define SF_MASK_EPASSIVE 0x60
|
||||||
|
|
||||||
|
/* bus states */
|
||||||
|
#define STATE_BUSOFF 2
|
||||||
|
#define STATE_EPASSIVE 1
|
||||||
|
#define STATE_EACTIVE 0
|
691
drivers/net/can/softing/softing_fw.c
Normal file
691
drivers/net/can/softing/softing_fw.c
Normal file
|
@ -0,0 +1,691 @@
|
||||||
|
/*
|
||||||
|
* 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"
|
||||||
|
|
||||||
|
/*
|
||||||
|
* low level DPRAM command.
|
||||||
|
* Make sure that card->dpram[DPRAM_FCT_HOST] is preset
|
||||||
|
*/
|
||||||
|
static int _softing_fct_cmd(struct softing *card, int16_t cmd, uint16_t vector,
|
||||||
|
const char *msg)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
unsigned long stamp;
|
||||||
|
|
||||||
|
iowrite16(cmd, &card->dpram[DPRAM_FCT_PARAM]);
|
||||||
|
iowrite8(vector >> 8, &card->dpram[DPRAM_FCT_HOST + 1]);
|
||||||
|
iowrite8(vector, &card->dpram[DPRAM_FCT_HOST]);
|
||||||
|
/* be sure to flush this to the card */
|
||||||
|
wmb();
|
||||||
|
stamp = jiffies + 1 * HZ;
|
||||||
|
/* wait for card */
|
||||||
|
do {
|
||||||
|
/* DPRAM_FCT_HOST is _not_ aligned */
|
||||||
|
ret = ioread8(&card->dpram[DPRAM_FCT_HOST]) +
|
||||||
|
(ioread8(&card->dpram[DPRAM_FCT_HOST + 1]) << 8);
|
||||||
|
/* don't have any cached variables */
|
||||||
|
rmb();
|
||||||
|
if (ret == RES_OK)
|
||||||
|
/* read return-value now */
|
||||||
|
return ioread16(&card->dpram[DPRAM_FCT_RESULT]);
|
||||||
|
|
||||||
|
if ((ret != vector) || time_after(jiffies, stamp))
|
||||||
|
break;
|
||||||
|
/* process context => relax */
|
||||||
|
usleep_range(500, 10000);
|
||||||
|
} while (1);
|
||||||
|
|
||||||
|
ret = (ret == RES_NONE) ? -ETIMEDOUT : -ECANCELED;
|
||||||
|
dev_alert(&card->pdev->dev, "firmware %s failed (%i)\n", msg, ret);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int softing_fct_cmd(struct softing *card, int16_t cmd, const char *msg)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
ret = _softing_fct_cmd(card, cmd, 0, msg);
|
||||||
|
if (ret > 0) {
|
||||||
|
dev_alert(&card->pdev->dev, "%s returned %u\n", msg, ret);
|
||||||
|
ret = -EIO;
|
||||||
|
}
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
int softing_bootloader_command(struct softing *card, int16_t cmd,
|
||||||
|
const char *msg)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
unsigned long stamp;
|
||||||
|
|
||||||
|
iowrite16(RES_NONE, &card->dpram[DPRAM_RECEIPT]);
|
||||||
|
iowrite16(cmd, &card->dpram[DPRAM_COMMAND]);
|
||||||
|
/* be sure to flush this to the card */
|
||||||
|
wmb();
|
||||||
|
stamp = jiffies + 3 * HZ;
|
||||||
|
/* wait for card */
|
||||||
|
do {
|
||||||
|
ret = ioread16(&card->dpram[DPRAM_RECEIPT]);
|
||||||
|
/* don't have any cached variables */
|
||||||
|
rmb();
|
||||||
|
if (ret == RES_OK)
|
||||||
|
return 0;
|
||||||
|
if (time_after(jiffies, stamp))
|
||||||
|
break;
|
||||||
|
/* process context => relax */
|
||||||
|
usleep_range(500, 10000);
|
||||||
|
} while (!signal_pending(current));
|
||||||
|
|
||||||
|
ret = (ret == RES_NONE) ? -ETIMEDOUT : -ECANCELED;
|
||||||
|
dev_alert(&card->pdev->dev, "bootloader %s failed (%i)\n", msg, ret);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int fw_parse(const uint8_t **pmem, uint16_t *ptype, uint32_t *paddr,
|
||||||
|
uint16_t *plen, const uint8_t **pdat)
|
||||||
|
{
|
||||||
|
uint16_t checksum[2];
|
||||||
|
const uint8_t *mem;
|
||||||
|
const uint8_t *end;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* firmware records are a binary, unaligned stream composed of:
|
||||||
|
* uint16_t type;
|
||||||
|
* uint32_t addr;
|
||||||
|
* uint16_t len;
|
||||||
|
* uint8_t dat[len];
|
||||||
|
* uint16_t checksum;
|
||||||
|
* all values in little endian.
|
||||||
|
* We could define a struct for this, with __attribute__((packed)),
|
||||||
|
* but would that solve the alignment in _all_ cases (cfr. the
|
||||||
|
* struct itself may be an odd address)?
|
||||||
|
*
|
||||||
|
* I chose to use leXX_to_cpup() since this solves both
|
||||||
|
* endianness & alignment.
|
||||||
|
*/
|
||||||
|
mem = *pmem;
|
||||||
|
*ptype = le16_to_cpup((void *)&mem[0]);
|
||||||
|
*paddr = le32_to_cpup((void *)&mem[2]);
|
||||||
|
*plen = le16_to_cpup((void *)&mem[6]);
|
||||||
|
*pdat = &mem[8];
|
||||||
|
/* verify checksum */
|
||||||
|
end = &mem[8 + *plen];
|
||||||
|
checksum[0] = le16_to_cpup((void *)end);
|
||||||
|
for (checksum[1] = 0; mem < end; ++mem)
|
||||||
|
checksum[1] += *mem;
|
||||||
|
if (checksum[0] != checksum[1])
|
||||||
|
return -EINVAL;
|
||||||
|
/* increment */
|
||||||
|
*pmem += 10 + *plen;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int softing_load_fw(const char *file, struct softing *card,
|
||||||
|
__iomem uint8_t *dpram, unsigned int size, int offset)
|
||||||
|
{
|
||||||
|
const struct firmware *fw;
|
||||||
|
int ret;
|
||||||
|
const uint8_t *mem, *end, *dat;
|
||||||
|
uint16_t type, len;
|
||||||
|
uint32_t addr;
|
||||||
|
uint8_t *buf = NULL;
|
||||||
|
int buflen = 0;
|
||||||
|
int8_t type_end = 0;
|
||||||
|
|
||||||
|
ret = request_firmware(&fw, file, &card->pdev->dev);
|
||||||
|
if (ret < 0)
|
||||||
|
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, &type, &addr, &len, &dat);
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
if (type != 0xffff)
|
||||||
|
goto failed;
|
||||||
|
if (strncmp("Structured Binary Format, Softing GmbH" , dat, len)) {
|
||||||
|
ret = -EINVAL;
|
||||||
|
goto failed;
|
||||||
|
}
|
||||||
|
/* ok, we had a header */
|
||||||
|
while (mem < end) {
|
||||||
|
ret = fw_parse(&mem, &type, &addr, &len, &dat);
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
if (type == 3) {
|
||||||
|
/* start address, not used here */
|
||||||
|
continue;
|
||||||
|
} else if (type == 1) {
|
||||||
|
/* eof */
|
||||||
|
type_end = 1;
|
||||||
|
break;
|
||||||
|
} else if (type != 0) {
|
||||||
|
ret = -EINVAL;
|
||||||
|
goto failed;
|
||||||
|
}
|
||||||
|
|
||||||
|
if ((addr + len + offset) > size)
|
||||||
|
goto failed;
|
||||||
|
memcpy_toio(&dpram[addr + offset], dat, len);
|
||||||
|
/* be sure to flush caches from IO space */
|
||||||
|
mb();
|
||||||
|
if (len > buflen) {
|
||||||
|
/* align buflen */
|
||||||
|
buflen = (len + (1024-1)) & ~(1024-1);
|
||||||
|
buf = krealloc(buf, buflen, GFP_KERNEL);
|
||||||
|
if (!buf) {
|
||||||
|
ret = -ENOMEM;
|
||||||
|
goto failed;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
/* verify record data */
|
||||||
|
memcpy_fromio(buf, &dpram[addr + offset], len);
|
||||||
|
if (memcmp(buf, dat, len)) {
|
||||||
|
/* is not ok */
|
||||||
|
dev_alert(&card->pdev->dev, "DPRAM readback failed\n");
|
||||||
|
ret = -EIO;
|
||||||
|
goto failed;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (!type_end)
|
||||||
|
/* no end record seen */
|
||||||
|
goto failed;
|
||||||
|
ret = 0;
|
||||||
|
failed:
|
||||||
|
kfree(buf);
|
||||||
|
release_firmware(fw);
|
||||||
|
if (ret < 0)
|
||||||
|
dev_info(&card->pdev->dev, "firmware %s failed\n", file);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
int softing_load_app_fw(const char *file, struct softing *card)
|
||||||
|
{
|
||||||
|
const struct firmware *fw;
|
||||||
|
const uint8_t *mem, *end, *dat;
|
||||||
|
int ret, j;
|
||||||
|
uint16_t type, len;
|
||||||
|
uint32_t addr, start_addr = 0;
|
||||||
|
unsigned int sum, rx_sum;
|
||||||
|
int8_t type_end = 0, type_entrypoint = 0;
|
||||||
|
|
||||||
|
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, &type, &addr, &len, &dat);
|
||||||
|
if (ret)
|
||||||
|
goto failed;
|
||||||
|
ret = -EINVAL;
|
||||||
|
if (type != 0xffff) {
|
||||||
|
dev_alert(&card->pdev->dev, "firmware starts with type 0x%x\n",
|
||||||
|
type);
|
||||||
|
goto failed;
|
||||||
|
}
|
||||||
|
if (strncmp("Structured Binary Format, Softing GmbH", dat, len)) {
|
||||||
|
dev_alert(&card->pdev->dev, "firmware string '%.*s' fault\n",
|
||||||
|
len, dat);
|
||||||
|
goto failed;
|
||||||
|
}
|
||||||
|
/* ok, we had a header */
|
||||||
|
while (mem < end) {
|
||||||
|
ret = fw_parse(&mem, &type, &addr, &len, &dat);
|
||||||
|
if (ret)
|
||||||
|
goto failed;
|
||||||
|
|
||||||
|
if (type == 3) {
|
||||||
|
/* start address */
|
||||||
|
start_addr = addr;
|
||||||
|
type_entrypoint = 1;
|
||||||
|
continue;
|
||||||
|
} else if (type == 1) {
|
||||||
|
/* eof */
|
||||||
|
type_end = 1;
|
||||||
|
break;
|
||||||
|
} else if (type != 0) {
|
||||||
|
dev_alert(&card->pdev->dev,
|
||||||
|
"unknown record type 0x%04x\n", type);
|
||||||
|
ret = -EINVAL;
|
||||||
|
goto failed;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* regualar data */
|
||||||
|
for (sum = 0, j = 0; j < len; ++j)
|
||||||
|
sum += dat[j];
|
||||||
|
/* work in 16bit (target) */
|
||||||
|
sum &= 0xffff;
|
||||||
|
|
||||||
|
memcpy_toio(&card->dpram[card->pdat->app.offs], dat, len);
|
||||||
|
iowrite32(card->pdat->app.offs + card->pdat->app.addr,
|
||||||
|
&card->dpram[DPRAM_COMMAND + 2]);
|
||||||
|
iowrite32(addr, &card->dpram[DPRAM_COMMAND + 6]);
|
||||||
|
iowrite16(len, &card->dpram[DPRAM_COMMAND + 10]);
|
||||||
|
iowrite8(1, &card->dpram[DPRAM_COMMAND + 12]);
|
||||||
|
ret = softing_bootloader_command(card, 1, "loading app.");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
/* verify checksum */
|
||||||
|
rx_sum = ioread16(&card->dpram[DPRAM_RECEIPT + 2]);
|
||||||
|
if (rx_sum != sum) {
|
||||||
|
dev_alert(&card->pdev->dev, "SRAM seems to be damaged"
|
||||||
|
", wanted 0x%04x, got 0x%04x\n", sum, rx_sum);
|
||||||
|
ret = -EIO;
|
||||||
|
goto failed;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (!type_end || !type_entrypoint)
|
||||||
|
goto failed;
|
||||||
|
/* start application in card */
|
||||||
|
iowrite32(start_addr, &card->dpram[DPRAM_COMMAND + 2]);
|
||||||
|
iowrite8(1, &card->dpram[DPRAM_COMMAND + 6]);
|
||||||
|
ret = softing_bootloader_command(card, 3, "start app.");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
ret = 0;
|
||||||
|
failed:
|
||||||
|
release_firmware(fw);
|
||||||
|
if (ret < 0)
|
||||||
|
dev_info(&card->pdev->dev, "firmware %s failed\n", file);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int softing_reset_chip(struct softing *card)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
do {
|
||||||
|
/* reset chip */
|
||||||
|
iowrite8(0, &card->dpram[DPRAM_RESET_RX_FIFO]);
|
||||||
|
iowrite8(0, &card->dpram[DPRAM_RESET_RX_FIFO+1]);
|
||||||
|
iowrite8(1, &card->dpram[DPRAM_RESET]);
|
||||||
|
iowrite8(0, &card->dpram[DPRAM_RESET+1]);
|
||||||
|
|
||||||
|
ret = softing_fct_cmd(card, 0, "reset_can");
|
||||||
|
if (!ret)
|
||||||
|
break;
|
||||||
|
if (signal_pending(current))
|
||||||
|
/* don't wait any longer */
|
||||||
|
break;
|
||||||
|
} while (1);
|
||||||
|
card->tx.pending = 0;
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
int softing_chip_poweron(struct softing *card)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
/* sync */
|
||||||
|
ret = _softing_fct_cmd(card, 99, 0x55, "sync-a");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
|
||||||
|
ret = _softing_fct_cmd(card, 99, 0xaa, "sync-b");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
|
||||||
|
ret = softing_reset_chip(card);
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
/* get_serial */
|
||||||
|
ret = softing_fct_cmd(card, 43, "get_serial_number");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
card->id.serial = ioread32(&card->dpram[DPRAM_FCT_PARAM]);
|
||||||
|
/* get_version */
|
||||||
|
ret = softing_fct_cmd(card, 12, "get_version");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
card->id.fw_version = ioread16(&card->dpram[DPRAM_FCT_PARAM + 2]);
|
||||||
|
card->id.hw_version = ioread16(&card->dpram[DPRAM_FCT_PARAM + 4]);
|
||||||
|
card->id.license = ioread16(&card->dpram[DPRAM_FCT_PARAM + 6]);
|
||||||
|
card->id.chip[0] = ioread16(&card->dpram[DPRAM_FCT_PARAM + 8]);
|
||||||
|
card->id.chip[1] = ioread16(&card->dpram[DPRAM_FCT_PARAM + 10]);
|
||||||
|
return 0;
|
||||||
|
failed:
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
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 bus_bitmask_start;
|
||||||
|
int j, error_reporting;
|
||||||
|
struct can_frame msg;
|
||||||
|
const struct can_bittiming *bt;
|
||||||
|
|
||||||
|
priv = netdev_priv(dev);
|
||||||
|
card = priv->card;
|
||||||
|
|
||||||
|
if (!card->fw.up)
|
||||||
|
return -EIO;
|
||||||
|
|
||||||
|
ret = mutex_lock_interruptible(&card->fw.lock);
|
||||||
|
if (ret)
|
||||||
|
return ret;
|
||||||
|
|
||||||
|
bus_bitmask_start = 0;
|
||||||
|
if (dev && up)
|
||||||
|
/* prepare to start this bus as well */
|
||||||
|
bus_bitmask_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)
|
||||||
|
bus_bitmask_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 (!bus_bitmask_start)
|
||||||
|
/* no busses to be brought up */
|
||||||
|
goto card_done;
|
||||||
|
|
||||||
|
if ((bus_bitmask_start & 1) && (bus_bitmask_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 (bus_bitmask_start & 1) {
|
||||||
|
netdev = card->net[0];
|
||||||
|
priv = netdev_priv(netdev);
|
||||||
|
error_reporting += softing_error_reporting(netdev);
|
||||||
|
/* init chip 1 */
|
||||||
|
bt = &priv->can.bittiming;
|
||||||
|
iowrite16(bt->brp, &card->dpram[DPRAM_FCT_PARAM + 2]);
|
||||||
|
iowrite16(bt->sjw, &card->dpram[DPRAM_FCT_PARAM + 4]);
|
||||||
|
iowrite16(bt->phase_seg1 + bt->prop_seg,
|
||||||
|
&card->dpram[DPRAM_FCT_PARAM + 6]);
|
||||||
|
iowrite16(bt->phase_seg2, &card->dpram[DPRAM_FCT_PARAM + 8]);
|
||||||
|
iowrite16((priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) ? 1 : 0,
|
||||||
|
&card->dpram[DPRAM_FCT_PARAM + 10]);
|
||||||
|
ret = softing_fct_cmd(card, 1, "initialize_chip[0]");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
/* set mode */
|
||||||
|
iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 2]);
|
||||||
|
iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 4]);
|
||||||
|
ret = softing_fct_cmd(card, 3, "set_mode[0]");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
/* set filter */
|
||||||
|
/* 11bit id & mask */
|
||||||
|
iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 2]);
|
||||||
|
iowrite16(0x07ff, &card->dpram[DPRAM_FCT_PARAM + 4]);
|
||||||
|
/* 29bit id.lo & mask.lo & id.hi & mask.hi */
|
||||||
|
iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 6]);
|
||||||
|
iowrite16(0xffff, &card->dpram[DPRAM_FCT_PARAM + 8]);
|
||||||
|
iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 10]);
|
||||||
|
iowrite16(0x1fff, &card->dpram[DPRAM_FCT_PARAM + 12]);
|
||||||
|
ret = softing_fct_cmd(card, 7, "set_filter[0]");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
/* set output control */
|
||||||
|
iowrite16(priv->output, &card->dpram[DPRAM_FCT_PARAM + 2]);
|
||||||
|
ret = softing_fct_cmd(card, 5, "set_output[0]");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
}
|
||||||
|
if (bus_bitmask_start & 2) {
|
||||||
|
netdev = card->net[1];
|
||||||
|
priv = netdev_priv(netdev);
|
||||||
|
error_reporting += softing_error_reporting(netdev);
|
||||||
|
/* init chip2 */
|
||||||
|
bt = &priv->can.bittiming;
|
||||||
|
iowrite16(bt->brp, &card->dpram[DPRAM_FCT_PARAM + 2]);
|
||||||
|
iowrite16(bt->sjw, &card->dpram[DPRAM_FCT_PARAM + 4]);
|
||||||
|
iowrite16(bt->phase_seg1 + bt->prop_seg,
|
||||||
|
&card->dpram[DPRAM_FCT_PARAM + 6]);
|
||||||
|
iowrite16(bt->phase_seg2, &card->dpram[DPRAM_FCT_PARAM + 8]);
|
||||||
|
iowrite16((priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) ? 1 : 0,
|
||||||
|
&card->dpram[DPRAM_FCT_PARAM + 10]);
|
||||||
|
ret = softing_fct_cmd(card, 2, "initialize_chip[1]");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
/* set mode2 */
|
||||||
|
iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 2]);
|
||||||
|
iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 4]);
|
||||||
|
ret = softing_fct_cmd(card, 4, "set_mode[1]");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
/* set filter2 */
|
||||||
|
/* 11bit id & mask */
|
||||||
|
iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 2]);
|
||||||
|
iowrite16(0x07ff, &card->dpram[DPRAM_FCT_PARAM + 4]);
|
||||||
|
/* 29bit id.lo & mask.lo & id.hi & mask.hi */
|
||||||
|
iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 6]);
|
||||||
|
iowrite16(0xffff, &card->dpram[DPRAM_FCT_PARAM + 8]);
|
||||||
|
iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 10]);
|
||||||
|
iowrite16(0x1fff, &card->dpram[DPRAM_FCT_PARAM + 12]);
|
||||||
|
ret = softing_fct_cmd(card, 8, "set_filter[1]");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
/* set output control2 */
|
||||||
|
iowrite16(priv->output, &card->dpram[DPRAM_FCT_PARAM + 2]);
|
||||||
|
ret = softing_fct_cmd(card, 6, "set_output[1]");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
}
|
||||||
|
/* enable_error_frame */
|
||||||
|
/*
|
||||||
|
* Error reporting is switched off at the moment since
|
||||||
|
* the receiving of them is not yet 100% verified
|
||||||
|
* This should be enabled sooner or later
|
||||||
|
*
|
||||||
|
if (error_reporting) {
|
||||||
|
ret = softing_fct_cmd(card, 51, "enable_error_frame");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
}
|
||||||
|
*/
|
||||||
|
/* initialize interface */
|
||||||
|
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 2]);
|
||||||
|
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 4]);
|
||||||
|
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 6]);
|
||||||
|
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 8]);
|
||||||
|
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 10]);
|
||||||
|
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 12]);
|
||||||
|
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 14]);
|
||||||
|
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 16]);
|
||||||
|
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 18]);
|
||||||
|
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 20]);
|
||||||
|
ret = softing_fct_cmd(card, 17, "initialize_interface");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
/* enable_fifo */
|
||||||
|
ret = softing_fct_cmd(card, 36, "enable_fifo");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
/* enable fifo tx ack */
|
||||||
|
ret = softing_fct_cmd(card, 13, "fifo_tx_ack[0]");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
/* enable fifo tx ack2 */
|
||||||
|
ret = softing_fct_cmd(card, 14, "fifo_tx_ack[1]");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
/* start_chip */
|
||||||
|
ret = softing_fct_cmd(card, 11, "start_chip");
|
||||||
|
if (ret < 0)
|
||||||
|
goto failed;
|
||||||
|
iowrite8(0, &card->dpram[DPRAM_INFO_BUSSTATE]);
|
||||||
|
iowrite8(0, &card->dpram[DPRAM_INFO_BUSSTATE2]);
|
||||||
|
if (card->pdat->generation < 2) {
|
||||||
|
iowrite8(0, &card->dpram[DPRAM_V2_IRQ_TOHOST]);
|
||||||
|
/* 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 (!(bus_bitmask_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;
|
||||||
|
invalid:
|
||||||
|
ret = -EINVAL;
|
||||||
|
failed:
|
||||||
|
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 ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
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:
|
||||||
|
return (card->pdat->generation < 2) ? 0xfb : 0xfa;
|
||||||
|
case 5:
|
||||||
|
return 0x60;
|
||||||
|
default:
|
||||||
|
return 0x40;
|
||||||
|
}
|
||||||
|
}
|
893
drivers/net/can/softing/softing_main.c
Normal file
893
drivers/net/can/softing/softing_main.c
Normal file
|
@ -0,0 +1,893 @@
|
||||||
|
/*
|
||||||
|
* 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+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, ktime_set(0, 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 usefull, 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() */
|
||||||
|
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)
|
||||||
|
ret = softing_startstop(ndev, 1);
|
||||||
|
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 __devinit 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_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, NULL);
|
||||||
|
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_channel.attr,
|
||||||
|
&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,
|
||||||
|
};
|
||||||
|
|
||||||
|
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 __devinit 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 __devinit int softing_netdev_register(struct net_device *netdev)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
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, 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);
|
||||||
|
DEV_ATTR_RO(frequency, id.freq);
|
||||||
|
DEV_ATTR_RO(txpending, tx.pending);
|
||||||
|
|
||||||
|
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,
|
||||||
|
&dev_attr_frequency.attr,
|
||||||
|
&dev_attr_txpending.attr,
|
||||||
|
NULL,
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct attribute_group softing_pdev_group = {
|
||||||
|
.name = NULL,
|
||||||
|
.attrs = softing_pdev_attrs,
|
||||||
|
};
|
||||||
|
|
||||||
|
/*
|
||||||
|
* platform driver
|
||||||
|
*/
|
||||||
|
static __devexit 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 __devinit 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);
|
||||||
|
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 = pres->end - pres->start + 1;
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
|
||||||
|
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] = 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",
|
||||||
|
.owner = THIS_MODULE,
|
||||||
|
},
|
||||||
|
.probe = softing_pdev_probe,
|
||||||
|
.remove = __devexit_p(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("Softing DPRAM CAN driver");
|
||||||
|
MODULE_AUTHOR("Kurt Van Dijck <kurt.van.dijck@eia.be>");
|
||||||
|
MODULE_LICENSE("GPL v2");
|
40
drivers/net/can/softing/softing_platform.h
Normal file
40
drivers/net/can/softing/softing_platform.h
Normal file
|
@ -0,0 +1,40 @@
|
||||||
|
|
||||||
|
#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 SJA1000
|
||||||
|
* 16bit, shared interrupt
|
||||||
|
*/
|
||||||
|
int generation;
|
||||||
|
int nbus; /* # busses on device */
|
||||||
|
unsigned int freq; /* operating frequency in Hz */
|
||||||
|
unsigned int max_brp;
|
||||||
|
unsigned int max_sjw;
|
||||||
|
unsigned long dpram_size;
|
||||||
|
const char *name;
|
||||||
|
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
|
Loading…
Reference in a new issue