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can: add driver for Softing card
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This patch adds the driver that creates a platform:softing device
from a pcmcia_device
Note: the Kconfig indicates a dependency on the softing.ko driver,
but this is purely to make configuration intuitive. This driver will
work independent, but no CAN network devices appear until softing.ko is
loaded too.

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>
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Kurt Van Dijck authored and davem330 committed Jan 22, 2011
1 parent 03fd3cf commit 0a0b7a5
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14 changes: 14 additions & 0 deletions drivers/net/can/softing/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -14,3 +14,17 @@ config CAN_SOFTING
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.

config CAN_SOFTING_CS
tristate "Softing Gmbh CAN pcmcia cards"
depends on PCMCIA
select CAN_SOFTING
---help---
Support for PCMCIA cards from Softing Gmbh & some cards
from Vector Gmbh.
You need firmware for these, which you can get at
http://developer.berlios.de/projects/socketcan/
This version of the driver is written against
firmware version 4.6 (softing-fw-4.6-binaries.tar.gz)
In order to use the card as CAN device, you need the Softing generic
support too.
1 change: 1 addition & 0 deletions drivers/net/can/softing/Makefile
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@

softing-y := softing_main.o softing_fw.o
obj-$(CONFIG_CAN_SOFTING) += softing.o
obj-$(CONFIG_CAN_SOFTING_CS) += softing_cs.o

ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG
359 changes: 359 additions & 0 deletions drivers/net/can/softing/softing_cs.c
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Original file line number Diff line number Diff line change
@@ -0,0 +1,359 @@
/*
* 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/module.h>
#include <linux/kernel.h>

#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>

#include "softing_platform.h"

static int softingcs_index;
static spinlock_t softingcs_index_lock;

static int softingcs_reset(struct platform_device *pdev, int v);
static int softingcs_enable_irq(struct platform_device *pdev, int v);

/*
* platform_data descriptions
*/
#define MHZ (1000*1000)
static const struct softing_platform_data softingcs_platform_data[] = {
{
.name = "CANcard",
.manf = 0x0168, .prod = 0x001,
.generation = 1,
.nbus = 2,
.freq = 16 * MHZ, .max_brp = 32, .max_sjw = 4,
.dpram_size = 0x0800,
.boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
.load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
.app = {0x0010, 0x0d0000, fw_dir "cancard.bin",},
.reset = softingcs_reset,
.enable_irq = softingcs_enable_irq,
}, {
.name = "CANcard-NEC",
.manf = 0x0168, .prod = 0x002,
.generation = 1,
.nbus = 2,
.freq = 16 * MHZ, .max_brp = 32, .max_sjw = 4,
.dpram_size = 0x0800,
.boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
.load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
.app = {0x0010, 0x0d0000, fw_dir "cancard.bin",},
.reset = softingcs_reset,
.enable_irq = softingcs_enable_irq,
}, {
.name = "CANcard-SJA",
.manf = 0x0168, .prod = 0x004,
.generation = 1,
.nbus = 2,
.freq = 20 * MHZ, .max_brp = 32, .max_sjw = 4,
.dpram_size = 0x0800,
.boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
.load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
.app = {0x0010, 0x0d0000, fw_dir "cansja.bin",},
.reset = softingcs_reset,
.enable_irq = softingcs_enable_irq,
}, {
.name = "CANcard-2",
.manf = 0x0168, .prod = 0x005,
.generation = 2,
.nbus = 2,
.freq = 24 * MHZ, .max_brp = 64, .max_sjw = 4,
.dpram_size = 0x1000,
.boot = {0x0000, 0x000000, fw_dir "bcard2.bin",},
.load = {0x0120, 0x00f600, fw_dir "ldcard2.bin",},
.app = {0x0010, 0x0d0000, fw_dir "cancrd2.bin",},
.reset = softingcs_reset,
.enable_irq = NULL,
}, {
.name = "Vector-CANcard",
.manf = 0x0168, .prod = 0x081,
.generation = 1,
.nbus = 2,
.freq = 16 * MHZ, .max_brp = 64, .max_sjw = 4,
.dpram_size = 0x0800,
.boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
.load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
.app = {0x0010, 0x0d0000, fw_dir "cancard.bin",},
.reset = softingcs_reset,
.enable_irq = softingcs_enable_irq,
}, {
.name = "Vector-CANcard-SJA",
.manf = 0x0168, .prod = 0x084,
.generation = 1,
.nbus = 2,
.freq = 20 * MHZ, .max_brp = 32, .max_sjw = 4,
.dpram_size = 0x0800,
.boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
.load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
.app = {0x0010, 0x0d0000, fw_dir "cansja.bin",},
.reset = softingcs_reset,
.enable_irq = softingcs_enable_irq,
}, {
.name = "Vector-CANcard-2",
.manf = 0x0168, .prod = 0x085,
.generation = 2,
.nbus = 2,
.freq = 24 * MHZ, .max_brp = 64, .max_sjw = 4,
.dpram_size = 0x1000,
.boot = {0x0000, 0x000000, fw_dir "bcard2.bin",},
.load = {0x0120, 0x00f600, fw_dir "ldcard2.bin",},
.app = {0x0010, 0x0d0000, fw_dir "cancrd2.bin",},
.reset = softingcs_reset,
.enable_irq = NULL,
}, {
.name = "EDICcard-NEC",
.manf = 0x0168, .prod = 0x102,
.generation = 1,
.nbus = 2,
.freq = 16 * MHZ, .max_brp = 64, .max_sjw = 4,
.dpram_size = 0x0800,
.boot = {0x0000, 0x000000, fw_dir "bcard.bin",},
.load = {0x0120, 0x00f600, fw_dir "ldcard.bin",},
.app = {0x0010, 0x0d0000, fw_dir "cancard.bin",},
.reset = softingcs_reset,
.enable_irq = softingcs_enable_irq,
}, {
.name = "EDICcard-2",
.manf = 0x0168, .prod = 0x105,
.generation = 2,
.nbus = 2,
.freq = 24 * MHZ, .max_brp = 64, .max_sjw = 4,
.dpram_size = 0x1000,
.boot = {0x0000, 0x000000, fw_dir "bcard2.bin",},
.load = {0x0120, 0x00f600, fw_dir "ldcard2.bin",},
.app = {0x0010, 0x0d0000, fw_dir "cancrd2.bin",},
.reset = softingcs_reset,
.enable_irq = NULL,
}, {
0, 0,
},
};

MODULE_FIRMWARE(fw_dir "bcard.bin");
MODULE_FIRMWARE(fw_dir "ldcard.bin");
MODULE_FIRMWARE(fw_dir "cancard.bin");
MODULE_FIRMWARE(fw_dir "cansja.bin");

MODULE_FIRMWARE(fw_dir "bcard2.bin");
MODULE_FIRMWARE(fw_dir "ldcard2.bin");
MODULE_FIRMWARE(fw_dir "cancrd2.bin");

static __devinit const struct softing_platform_data
*softingcs_find_platform_data(unsigned int manf, unsigned int prod)
{
const struct softing_platform_data *lp;

for (lp = softingcs_platform_data; lp->manf; ++lp) {
if ((lp->manf == manf) && (lp->prod == prod))
return lp;
}
return NULL;
}

/*
* platformdata callbacks
*/
static int softingcs_reset(struct platform_device *pdev, int v)
{
struct pcmcia_device *pcmcia = to_pcmcia_dev(pdev->dev.parent);

dev_dbg(&pdev->dev, "pcmcia config [2] %02x\n", v ? 0 : 0x20);
return pcmcia_write_config_byte(pcmcia, 2, v ? 0 : 0x20);
}

static int softingcs_enable_irq(struct platform_device *pdev, int v)
{
struct pcmcia_device *pcmcia = to_pcmcia_dev(pdev->dev.parent);

dev_dbg(&pdev->dev, "pcmcia config [0] %02x\n", v ? 0x60 : 0);
return pcmcia_write_config_byte(pcmcia, 0, v ? 0x60 : 0);
}

/*
* pcmcia check
*/
static __devinit int softingcs_probe_config(struct pcmcia_device *pcmcia,
void *priv_data)
{
struct softing_platform_data *pdat = priv_data;
struct resource *pres;
int memspeed = 0;

WARN_ON(!pdat);
pres = pcmcia->resource[PCMCIA_IOMEM_0];
if (resource_size(pres) < 0x1000)
return -ERANGE;

pres->flags |= WIN_MEMORY_TYPE_CM | WIN_ENABLE;
if (pdat->generation < 2) {
pres->flags |= WIN_USE_WAIT | WIN_DATA_WIDTH_8;
memspeed = 3;
} else {
pres->flags |= WIN_DATA_WIDTH_16;
}
return pcmcia_request_window(pcmcia, pres, memspeed);
}

static __devexit void softingcs_remove(struct pcmcia_device *pcmcia)
{
struct platform_device *pdev = pcmcia->priv;

/* free bits */
platform_device_unregister(pdev);
/* release pcmcia stuff */
pcmcia_disable_device(pcmcia);
}

/*
* platform_device wrapper
* pdev->resource has 2 entries: io & irq
*/
static void softingcs_pdev_release(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
kfree(pdev);
}

static __devinit int softingcs_probe(struct pcmcia_device *pcmcia)
{
int ret;
struct platform_device *pdev;
const struct softing_platform_data *pdat;
struct resource *pres;
struct dev {
struct platform_device pdev;
struct resource res[2];
} *dev;

/* find matching platform_data */
pdat = softingcs_find_platform_data(pcmcia->manf_id, pcmcia->card_id);
if (!pdat)
return -ENOTTY;

/* setup pcmcia device */
pcmcia->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IOMEM |
CONF_AUTO_SET_VPP | CONF_AUTO_CHECK_VCC;
ret = pcmcia_loop_config(pcmcia, softingcs_probe_config, (void *)pdat);
if (ret)
goto pcmcia_failed;

ret = pcmcia_enable_device(pcmcia);
if (ret < 0)
goto pcmcia_failed;

pres = pcmcia->resource[PCMCIA_IOMEM_0];
if (!pres) {
ret = -EBADF;
goto pcmcia_bad;
}

/* create softing platform device */
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev) {
ret = -ENOMEM;
goto mem_failed;
}
dev->pdev.resource = dev->res;
dev->pdev.num_resources = ARRAY_SIZE(dev->res);
dev->pdev.dev.release = softingcs_pdev_release;

pdev = &dev->pdev;
pdev->dev.platform_data = (void *)pdat;
pdev->dev.parent = &pcmcia->dev;
pcmcia->priv = pdev;

/* platform device resources */
pdev->resource[0].flags = IORESOURCE_MEM;
pdev->resource[0].start = pres->start;
pdev->resource[0].end = pres->end;

pdev->resource[1].flags = IORESOURCE_IRQ;
pdev->resource[1].start = pcmcia->irq;
pdev->resource[1].end = pdev->resource[1].start;

/* platform device setup */
spin_lock(&softingcs_index_lock);
pdev->id = softingcs_index++;
spin_unlock(&softingcs_index_lock);
pdev->name = "softing";
dev_set_name(&pdev->dev, "softingcs.%i", pdev->id);
ret = platform_device_register(pdev);
if (ret < 0)
goto platform_failed;

dev_info(&pcmcia->dev, "created %s\n", dev_name(&pdev->dev));
return 0;

platform_failed:
kfree(dev);
mem_failed:
pcmcia_bad:
pcmcia_failed:
pcmcia_disable_device(pcmcia);
pcmcia->priv = NULL;
return ret ?: -ENODEV;
}

static /*const*/ struct pcmcia_device_id softingcs_ids[] = {
/* softing */
PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0001),
PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0002),
PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0004),
PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0005),
/* vector, manufacturer? */
PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0081),
PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0084),
PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0085),
/* EDIC */
PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0102),
PCMCIA_DEVICE_MANF_CARD(0x0168, 0x0105),
PCMCIA_DEVICE_NULL,
};

MODULE_DEVICE_TABLE(pcmcia, softingcs_ids);

static struct pcmcia_driver softingcs_driver = {
.owner = THIS_MODULE,
.name = "softingcs",
.id_table = softingcs_ids,
.probe = softingcs_probe,
.remove = __devexit_p(softingcs_remove),
};

static int __init softingcs_start(void)
{
spin_lock_init(&softingcs_index_lock);
return pcmcia_register_driver(&softingcs_driver);
}

static void __exit softingcs_stop(void)
{
pcmcia_unregister_driver(&softingcs_driver);
}

module_init(softingcs_start);
module_exit(softingcs_stop);

MODULE_DESCRIPTION("softing CANcard driver"
", links PCMCIA card to softing driver");
MODULE_LICENSE("GPL v2");

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