net/can/mscan: improve build
- move Kconfig entries to the subdirectory - do remaining renames of mpc52xx to mpc5xxx Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wolfram Sang
committed by
David S. Miller
David S. Miller
parent
323907ac72
commit
24cfbcbabf
259
drivers/net/can/mscan/mpc5xxx_can.c
Normal file
259
drivers/net/can/mscan/mpc5xxx_can.c
Normal file
@@ -0,0 +1,259 @@
|
||||
/*
|
||||
* CAN bus driver for the Freescale MPC5xxx embedded CPU.
|
||||
*
|
||||
* Copyright (C) 2004-2005 Andrey Volkov <avolkov@varma-el.com>,
|
||||
* Varma Electronics Oy
|
||||
* Copyright (C) 2008-2009 Wolfgang Grandegger <wg@grandegger.com>
|
||||
* Copyright (C) 2009 Wolfram Sang, Pengutronix <w.sang@pengutronix.de>
|
||||
*
|
||||
* 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/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/netdevice.h>
|
||||
#include <linux/can.h>
|
||||
#include <linux/can/dev.h>
|
||||
#include <linux/of_platform.h>
|
||||
#include <sysdev/fsl_soc.h>
|
||||
#include <linux/io.h>
|
||||
#include <asm/mpc52xx.h>
|
||||
|
||||
#include "mscan.h"
|
||||
|
||||
#define DRV_NAME "mpc5xxx_can"
|
||||
|
||||
static struct of_device_id mpc52xx_cdm_ids[] __devinitdata = {
|
||||
{ .compatible = "fsl,mpc5200-cdm", },
|
||||
{}
|
||||
};
|
||||
|
||||
/*
|
||||
* Get frequency of the MSCAN clock source
|
||||
*
|
||||
* Either the oscillator clock (SYS_XTAL_IN) or the IP bus clock (IP_CLK)
|
||||
* can be selected. According to the MPC5200 user's manual, the oscillator
|
||||
* clock is the better choice as it has less jitter but due to a hardware
|
||||
* bug, it can not be selected for the old MPC5200 Rev. A chips.
|
||||
*/
|
||||
|
||||
static unsigned int __devinit mpc52xx_can_clock_freq(struct of_device *of,
|
||||
int clock_src)
|
||||
{
|
||||
unsigned int pvr;
|
||||
struct mpc52xx_cdm __iomem *cdm;
|
||||
struct device_node *np_cdm;
|
||||
unsigned int freq;
|
||||
u32 val;
|
||||
|
||||
pvr = mfspr(SPRN_PVR);
|
||||
|
||||
freq = mpc5xxx_get_bus_frequency(of->node);
|
||||
if (!freq)
|
||||
return 0;
|
||||
|
||||
if (clock_src == MSCAN_CLKSRC_BUS || pvr == 0x80822011)
|
||||
return freq;
|
||||
|
||||
/* Determine SYS_XTAL_IN frequency from the clock domain settings */
|
||||
np_cdm = of_find_matching_node(NULL, mpc52xx_cdm_ids);
|
||||
if (!np_cdm) {
|
||||
dev_err(&of->dev, "can't get clock node!\n");
|
||||
return 0;
|
||||
}
|
||||
cdm = of_iomap(np_cdm, 0);
|
||||
of_node_put(np_cdm);
|
||||
|
||||
if (in_8(&cdm->ipb_clk_sel) & 0x1)
|
||||
freq *= 2;
|
||||
val = in_be32(&cdm->rstcfg);
|
||||
|
||||
freq *= (val & (1 << 5)) ? 8 : 4;
|
||||
freq /= (val & (1 << 6)) ? 12 : 16;
|
||||
|
||||
iounmap(cdm);
|
||||
|
||||
return freq;
|
||||
}
|
||||
|
||||
static int __devinit mpc5xxx_can_probe(struct of_device *ofdev,
|
||||
const struct of_device_id *id)
|
||||
{
|
||||
struct device_node *np = ofdev->node;
|
||||
struct net_device *dev;
|
||||
struct mscan_priv *priv;
|
||||
void __iomem *base;
|
||||
const char *clk_src;
|
||||
int err, irq, clock_src;
|
||||
|
||||
base = of_iomap(ofdev->node, 0);
|
||||
if (!base) {
|
||||
dev_err(&ofdev->dev, "couldn't ioremap\n");
|
||||
err = -ENOMEM;
|
||||
goto exit_release_mem;
|
||||
}
|
||||
|
||||
irq = irq_of_parse_and_map(np, 0);
|
||||
if (!irq) {
|
||||
dev_err(&ofdev->dev, "no irq found\n");
|
||||
err = -ENODEV;
|
||||
goto exit_unmap_mem;
|
||||
}
|
||||
|
||||
dev = alloc_mscandev();
|
||||
if (!dev) {
|
||||
err = -ENOMEM;
|
||||
goto exit_dispose_irq;
|
||||
}
|
||||
|
||||
priv = netdev_priv(dev);
|
||||
priv->reg_base = base;
|
||||
dev->irq = irq;
|
||||
|
||||
/*
|
||||
* Either the oscillator clock (SYS_XTAL_IN) or the IP bus clock
|
||||
* (IP_CLK) can be selected as MSCAN clock source. According to
|
||||
* the MPC5200 user's manual, the oscillator clock is the better
|
||||
* choice as it has less jitter. For this reason, it is selected
|
||||
* by default.
|
||||
*/
|
||||
clk_src = of_get_property(np, "fsl,mscan-clock-source", NULL);
|
||||
if (clk_src && strcmp(clk_src, "ip") == 0)
|
||||
clock_src = MSCAN_CLKSRC_BUS;
|
||||
else
|
||||
clock_src = MSCAN_CLKSRC_XTAL;
|
||||
priv->can.clock.freq = mpc52xx_can_clock_freq(ofdev, clock_src);
|
||||
if (!priv->can.clock.freq) {
|
||||
dev_err(&ofdev->dev, "couldn't get MSCAN clock frequency\n");
|
||||
err = -ENODEV;
|
||||
goto exit_free_mscan;
|
||||
}
|
||||
|
||||
SET_NETDEV_DEV(dev, &ofdev->dev);
|
||||
|
||||
err = register_mscandev(dev, clock_src);
|
||||
if (err) {
|
||||
dev_err(&ofdev->dev, "registering %s failed (err=%d)\n",
|
||||
DRV_NAME, err);
|
||||
goto exit_free_mscan;
|
||||
}
|
||||
|
||||
dev_set_drvdata(&ofdev->dev, dev);
|
||||
|
||||
dev_info(&ofdev->dev, "MSCAN at 0x%p, irq %d, clock %d Hz\n",
|
||||
priv->reg_base, dev->irq, priv->can.clock.freq);
|
||||
|
||||
return 0;
|
||||
|
||||
exit_free_mscan:
|
||||
free_candev(dev);
|
||||
exit_dispose_irq:
|
||||
irq_dispose_mapping(irq);
|
||||
exit_unmap_mem:
|
||||
iounmap(base);
|
||||
exit_release_mem:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __devexit mpc5xxx_can_remove(struct of_device *ofdev)
|
||||
{
|
||||
struct net_device *dev = dev_get_drvdata(&ofdev->dev);
|
||||
struct mscan_priv *priv = netdev_priv(dev);
|
||||
|
||||
dev_set_drvdata(&ofdev->dev, NULL);
|
||||
|
||||
unregister_mscandev(dev);
|
||||
iounmap(priv->reg_base);
|
||||
irq_dispose_mapping(dev->irq);
|
||||
free_candev(dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static struct mscan_regs saved_regs;
|
||||
static int mpc5xxx_can_suspend(struct of_device *ofdev, pm_message_t state)
|
||||
{
|
||||
struct net_device *dev = dev_get_drvdata(&ofdev->dev);
|
||||
struct mscan_priv *priv = netdev_priv(dev);
|
||||
struct mscan_regs *regs = (struct mscan_regs *)priv->reg_base;
|
||||
|
||||
_memcpy_fromio(&saved_regs, regs, sizeof(*regs));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mpc5xxx_can_resume(struct of_device *ofdev)
|
||||
{
|
||||
struct net_device *dev = dev_get_drvdata(&ofdev->dev);
|
||||
struct mscan_priv *priv = netdev_priv(dev);
|
||||
struct mscan_regs *regs = (struct mscan_regs *)priv->reg_base;
|
||||
|
||||
regs->canctl0 |= MSCAN_INITRQ;
|
||||
while (!(regs->canctl1 & MSCAN_INITAK))
|
||||
udelay(10);
|
||||
|
||||
regs->canctl1 = saved_regs.canctl1;
|
||||
regs->canbtr0 = saved_regs.canbtr0;
|
||||
regs->canbtr1 = saved_regs.canbtr1;
|
||||
regs->canidac = saved_regs.canidac;
|
||||
|
||||
/* restore masks, buffers etc. */
|
||||
_memcpy_toio(®s->canidar1_0, (void *)&saved_regs.canidar1_0,
|
||||
sizeof(*regs) - offsetof(struct mscan_regs, canidar1_0));
|
||||
|
||||
regs->canctl0 &= ~MSCAN_INITRQ;
|
||||
regs->cantbsel = saved_regs.cantbsel;
|
||||
regs->canrier = saved_regs.canrier;
|
||||
regs->cantier = saved_regs.cantier;
|
||||
regs->canctl0 = saved_regs.canctl0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static struct of_device_id __devinitdata mpc5xxx_can_table[] = {
|
||||
{.compatible = "fsl,mpc5200-mscan"},
|
||||
{},
|
||||
};
|
||||
|
||||
static struct of_platform_driver mpc5xxx_can_driver = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = "mpc5xxx_can",
|
||||
.probe = mpc5xxx_can_probe,
|
||||
.remove = __devexit_p(mpc5xxx_can_remove),
|
||||
#ifdef CONFIG_PM
|
||||
.suspend = mpc5xxx_can_suspend,
|
||||
.resume = mpc5xxx_can_resume,
|
||||
#endif
|
||||
.match_table = mpc5xxx_can_table,
|
||||
};
|
||||
|
||||
static int __init mpc5xxx_can_init(void)
|
||||
{
|
||||
return of_register_platform_driver(&mpc5xxx_can_driver);
|
||||
}
|
||||
module_init(mpc5xxx_can_init);
|
||||
|
||||
static void __exit mpc5xxx_can_exit(void)
|
||||
{
|
||||
return of_unregister_platform_driver(&mpc5xxx_can_driver);
|
||||
};
|
||||
module_exit(mpc5xxx_can_exit);
|
||||
|
||||
MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
|
||||
MODULE_DESCRIPTION("Freescale MPC5200 CAN driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Reference in New Issue
Block a user