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can: peak_pci: add support of some new PEAK-System PCI cards

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This patch adds the support of some new PEAK-System PCI cards in the CAN
network sub-system. These are:

PCAN-PCIeC (PCI-ExpressCard)
PCAN-mminiPCI (mini-PCI)
PCAN-PCI (PCI next-gen)

This patch also adds the control of the blinking leds of the PCAN-PCIeC.

Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Stephane Grosjean 2012-03-02 16:21:19 +01:00 committed by Marc Kleine-Budde
parent 224223aaf9
commit e6d9c80b7c
2 changed files with 507 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/net/can/sja1000/Kconfig
View File

@ -44,11 +44,23 @@ config CAN_EMS_PCI
(http://www.ems-wuensche.de). (http://www.ems-wuensche.de).
config CAN_PEAK_PCI config CAN_PEAK_PCI
tristate "PEAK PCAN PCI/PCIe Cards" tristate "PEAK PCAN-PCI/PCIe/miniPCI Cards"
depends on PCI depends on PCI
---help--- ---help---
This driver is for the PCAN PCI/PCIe cards (1, 2, 3 or 4 channels) This driver is for the PCAN-PCI/PCIe/miniPCI cards
from PEAK Systems (http://www.peak-system.com). (1, 2, 3 or 4 channels) from PEAK-System Technik
(http://www.peak-system.com).
config CAN_PEAK_PCIEC
bool "PEAK PCAN-ExpressCard Cards"
depends on CAN_PEAK_PCI
select I2C
select I2C_ALGOBIT
default y
---help---
Say Y here if you want to use a PCAN-ExpressCard from PEAK-System
Technik. This will also automatically select I2C and I2C_ALGO
configuration options.
config CAN_KVASER_PCI config CAN_KVASER_PCI
tristate "Kvaser PCIcanx and Kvaser PCIcan PCI Cards" tristate "Kvaser PCIcanx and Kvaser PCIcan PCI Cards"

507
drivers/net/can/sja1000/peak_pci.c
View File

@ -1,5 +1,6 @@
/* /*
* Copyright (C) 2007, 2011 Wolfgang Grandegger <wg@grandegger.com> * Copyright (C) 2007, 2011 Wolfgang Grandegger <wg@grandegger.com>
* Copyright (C) 2012 Stephane Grosjean <s.grosjean@peak-system.com>
* *
* Derived from the PCAN project file driver/src/pcan_pci.c: * Derived from the PCAN project file driver/src/pcan_pci.c:
* *
@ -13,10 +14,6 @@
* but WITHOUT ANY WARRANTY; without even the implied warranty of * but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details. * 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/kernel.h>
@ -26,22 +23,26 @@
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/pci.h> #include <linux/pci.h>
#include <linux/io.h> #include <linux/io.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/can.h> #include <linux/can.h>
#include <linux/can/dev.h> #include <linux/can/dev.h>
#include "sja1000.h" #include "sja1000.h"
MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>"); MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
MODULE_DESCRIPTION("Socket-CAN driver for PEAK PCAN PCI/PCIe cards"); MODULE_DESCRIPTION("Socket-CAN driver for PEAK PCAN PCI family cards");
MODULE_SUPPORTED_DEVICE("PEAK PCAN PCI/PCIe CAN card"); MODULE_SUPPORTED_DEVICE("PEAK PCAN PCI/PCIe/PCIeC miniPCI CAN cards");
MODULE_LICENSE("GPL v2"); MODULE_LICENSE("GPL v2");
#define DRV_NAME "peak_pci" #define DRV_NAME "peak_pci"
struct peak_pciec_card;
struct peak_pci_chan { struct peak_pci_chan {
void __iomem *cfg_base; /* Common for all channels */ void __iomem *cfg_base; /* Common for all channels */
struct net_device *prev_dev; /* Chain of network devices */ struct net_device *prev_dev; /* Chain of network devices */
u16 icr_mask; /* Interrupt mask for fast ack */ u16 icr_mask; /* Interrupt mask for fast ack */
struct peak_pciec_card *pciec_card; /* only for PCIeC LEDs */
}; };
#define PEAK_PCI_CAN_CLOCK (16000000 / 2) #define PEAK_PCI_CAN_CLOCK (16000000 / 2)
@ -61,16 +62,464 @@ struct peak_pci_chan {
#define PEAK_PCI_VENDOR_ID 0x001C /* The PCI device and vendor IDs */ #define PEAK_PCI_VENDOR_ID 0x001C /* The PCI device and vendor IDs */
#define PEAK_PCI_DEVICE_ID 0x0001 /* for PCI/PCIe slot cards */ #define PEAK_PCI_DEVICE_ID 0x0001 /* for PCI/PCIe slot cards */
#define PEAK_PCIEC_DEVICE_ID 0x0002 /* for ExpressCard slot cards */
#define PEAK_PCIE_DEVICE_ID 0x0003 /* for nextgen PCIe slot cards */
#define PEAK_MPCI_DEVICE_ID 0x0008 /* The miniPCI slot cards */
static const u16 peak_pci_icr_masks[] = {0x02, 0x01, 0x40, 0x80}; #define PEAK_PCI_CHAN_MAX 4
static const u16 peak_pci_icr_masks[PEAK_PCI_CHAN_MAX] = {
0x02, 0x01, 0x40, 0x80
};
static DEFINE_PCI_DEVICE_TABLE(peak_pci_tbl) = { static DEFINE_PCI_DEVICE_TABLE(peak_pci_tbl) = {
{PEAK_PCI_VENDOR_ID, PEAK_PCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,}, {PEAK_PCI_VENDOR_ID, PEAK_PCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
{PEAK_PCI_VENDOR_ID, PEAK_PCIE_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
{PEAK_PCI_VENDOR_ID, PEAK_MPCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
#ifdef CONFIG_CAN_PEAK_PCIEC
{PEAK_PCI_VENDOR_ID, PEAK_PCIEC_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
#endif
{0,} {0,}
}; };
MODULE_DEVICE_TABLE(pci, peak_pci_tbl); MODULE_DEVICE_TABLE(pci, peak_pci_tbl);
#ifdef CONFIG_CAN_PEAK_PCIEC
/*
* PCAN-ExpressCard needs I2C bit-banging configuration option.
*/
/* GPIOICR byte access offsets */
#define PITA_GPOUT 0x18 /* GPx output value */
#define PITA_GPIN 0x19 /* GPx input value */
#define PITA_GPOEN 0x1A /* configure GPx as ouput pin */
/* I2C GP bits */
#define PITA_GPIN_SCL 0x01 /* Serial Clock Line */
#define PITA_GPIN_SDA 0x04 /* Serial DAta line */
#define PCA9553_1_SLAVEADDR (0xC4 >> 1)
/* PCA9553 LS0 fields values */
enum {
PCA9553_LOW,
PCA9553_HIGHZ,
PCA9553_PWM0,
PCA9553_PWM1
};
/* LEDs control */
#define PCA9553_ON PCA9553_LOW
#define PCA9553_OFF PCA9553_HIGHZ
#define PCA9553_SLOW PCA9553_PWM0
#define PCA9553_FAST PCA9553_PWM1
#define PCA9553_LED(c) (1 << (c))
#define PCA9553_LED_STATE(s, c) ((s) << ((c) << 1))
#define PCA9553_LED_ON(c) PCA9553_LED_STATE(PCA9553_ON, c)
#define PCA9553_LED_OFF(c) PCA9553_LED_STATE(PCA9553_OFF, c)
#define PCA9553_LED_SLOW(c) PCA9553_LED_STATE(PCA9553_SLOW, c)
#define PCA9553_LED_FAST(c) PCA9553_LED_STATE(PCA9553_FAST, c)
#define PCA9553_LED_MASK(c) PCA9553_LED_STATE(0x03, c)
#define PCA9553_LED_OFF_ALL (PCA9553_LED_OFF(0) | PCA9553_LED_OFF(1))
#define PCA9553_LS0_INIT 0x40 /* initial value (!= from 0x00) */
struct peak_pciec_chan {
struct net_device *netdev;
unsigned long prev_rx_bytes;
unsigned long prev_tx_bytes;
};
struct peak_pciec_card {
void __iomem *cfg_base; /* Common for all channels */
void __iomem *reg_base; /* first channel base address */
u8 led_cache; /* leds state cache */
/* PCIExpressCard i2c data */
struct i2c_algo_bit_data i2c_bit;
struct i2c_adapter led_chip;
struct delayed_work led_work; /* led delayed work */
int chan_count;
struct peak_pciec_chan channel[PEAK_PCI_CHAN_MAX];
};
/* "normal" pci register write callback is overloaded for leds control */
static void peak_pci_write_reg(const struct sja1000_priv *priv,
int port, u8 val);
static inline void pita_set_scl_highz(struct peak_pciec_card *card)
{
u8 gp_outen = readb(card->cfg_base + PITA_GPOEN) & ~PITA_GPIN_SCL;
writeb(gp_outen, card->cfg_base + PITA_GPOEN);
}
static inline void pita_set_sda_highz(struct peak_pciec_card *card)
{
u8 gp_outen = readb(card->cfg_base + PITA_GPOEN) & ~PITA_GPIN_SDA;
writeb(gp_outen, card->cfg_base + PITA_GPOEN);
}
static void peak_pciec_init_pita_gpio(struct peak_pciec_card *card)
{
/* raise SCL & SDA GPIOs to high-Z */
pita_set_scl_highz(card);
pita_set_sda_highz(card);
}
static void pita_setsda(void *data, int state)
{
struct peak_pciec_card *card = (struct peak_pciec_card *)data;
u8 gp_out, gp_outen;
/* set output sda always to 0 */
gp_out = readb(card->cfg_base + PITA_GPOUT) & ~PITA_GPIN_SDA;
writeb(gp_out, card->cfg_base + PITA_GPOUT);
/* control output sda with GPOEN */
gp_outen = readb(card->cfg_base + PITA_GPOEN);
if (state)
gp_outen &= ~PITA_GPIN_SDA;
else
gp_outen |= PITA_GPIN_SDA;
writeb(gp_outen, card->cfg_base + PITA_GPOEN);
}
static void pita_setscl(void *data, int state)
{
struct peak_pciec_card *card = (struct peak_pciec_card *)data;
u8 gp_out, gp_outen;
/* set output scl always to 0 */
gp_out = readb(card->cfg_base + PITA_GPOUT) & ~PITA_GPIN_SCL;
writeb(gp_out, card->cfg_base + PITA_GPOUT);
/* control output scl with GPOEN */
gp_outen = readb(card->cfg_base + PITA_GPOEN);
if (state)
gp_outen &= ~PITA_GPIN_SCL;
else
gp_outen |= PITA_GPIN_SCL;
writeb(gp_outen, card->cfg_base + PITA_GPOEN);
}
static int pita_getsda(void *data)
{
struct peak_pciec_card *card = (struct peak_pciec_card *)data;
/* set tristate */
pita_set_sda_highz(card);
return (readb(card->cfg_base + PITA_GPIN) & PITA_GPIN_SDA) ? 1 : 0;
}
static int pita_getscl(void *data)
{
struct peak_pciec_card *card = (struct peak_pciec_card *)data;
/* set tristate */
pita_set_scl_highz(card);
return (readb(card->cfg_base + PITA_GPIN) & PITA_GPIN_SCL) ? 1 : 0;
}
/*
* write commands to the LED chip though the I2C-bus of the PCAN-PCIeC
*/
static int peak_pciec_write_pca9553(struct peak_pciec_card *card,
u8 offset, u8 data)
{
u8 buffer[2] = {
offset,
data
};
struct i2c_msg msg = {
.addr = PCA9553_1_SLAVEADDR,
.len = 2,
.buf = buffer,
};
int ret;
/* cache led mask */
if ((offset == 5) && (data == card->led_cache))
return 0;
ret = i2c_transfer(&card->led_chip, &msg, 1);
if (ret < 0)
return ret;
if (offset == 5)
card->led_cache = data;
return 0;
}
/*
* delayed work callback used to control the LEDs
*/
static void peak_pciec_led_work(struct work_struct *work)
{
struct peak_pciec_card *card =
container_of(work, struct peak_pciec_card, led_work.work);
struct net_device *netdev;
u8 new_led = card->led_cache;
int i, up_count = 0;
/* first check what is to do */
for (i = 0; i < card->chan_count; i++) {
/* default is: not configured */
new_led &= ~PCA9553_LED_MASK(i);
new_led |= PCA9553_LED_ON(i);
netdev = card->channel[i].netdev;
if (!netdev || !(netdev->flags & IFF_UP))
continue;
up_count++;
/* no activity (but configured) */
new_led &= ~PCA9553_LED_MASK(i);
new_led |= PCA9553_LED_SLOW(i);
/* if bytes counters changed, set fast blinking led */
if (netdev->stats.rx_bytes != card->channel[i].prev_rx_bytes) {
card->channel[i].prev_rx_bytes = netdev->stats.rx_bytes;
new_led &= ~PCA9553_LED_MASK(i);
new_led |= PCA9553_LED_FAST(i);
}
if (netdev->stats.tx_bytes != card->channel[i].prev_tx_bytes) {
card->channel[i].prev_tx_bytes = netdev->stats.tx_bytes;
new_led &= ~PCA9553_LED_MASK(i);
new_led |= PCA9553_LED_FAST(i);
}
}
/* check if LS0 settings changed, only update i2c if so */
peak_pciec_write_pca9553(card, 5, new_led);
/* restart timer (except if no more configured channels) */
if (up_count)
schedule_delayed_work(&card->led_work, HZ);
}
/*
* set LEDs blinking state
*/
static void peak_pciec_set_leds(struct peak_pciec_card *card, u8 led_mask, u8 s)
{
u8 new_led = card->led_cache;
int i;
/* first check what is to do */
for (i = 0; i < card->chan_count; i++)
if (led_mask & PCA9553_LED(i)) {
new_led &= ~PCA9553_LED_MASK(i);
new_led |= PCA9553_LED_STATE(s, i);
}
/* check if LS0 settings changed, only update i2c if so */
peak_pciec_write_pca9553(card, 5, new_led);
}
/*
* start one second delayed work to control LEDs
*/
static void peak_pciec_start_led_work(struct peak_pciec_card *card)
{
if (!delayed_work_pending(&card->led_work))
schedule_delayed_work(&card->led_work, HZ);
}
/*
* stop LEDs delayed work
*/
static void peak_pciec_stop_led_work(struct peak_pciec_card *card)
{
cancel_delayed_work_sync(&card->led_work);
}
/*
* initialize the PCA9553 4-bit I2C-bus LED chip
*/
static int peak_pciec_init_leds(struct peak_pciec_card *card)
{
int err;
/* prescaler for frequency 0: "SLOW" = 1 Hz = "44" */
err = peak_pciec_write_pca9553(card, 1, 44 / 1);
if (err)
return err;
/* duty cycle 0: 50% */
err = peak_pciec_write_pca9553(card, 2, 0x80);
if (err)
return err;
/* prescaler for frequency 1: "FAST" = 5 Hz */
err = peak_pciec_write_pca9553(card, 3, 44 / 5);
if (err)
return err;
/* duty cycle 1: 50% */
err = peak_pciec_write_pca9553(card, 4, 0x80);
if (err)
return err;
/* switch LEDs to initial state */
return peak_pciec_write_pca9553(card, 5, PCA9553_LS0_INIT);
}
/*
* restore LEDs state to off peak_pciec_leds_exit
*/
static void peak_pciec_leds_exit(struct peak_pciec_card *card)
{
/* switch LEDs to off */
peak_pciec_write_pca9553(card, 5, PCA9553_LED_OFF_ALL);
}
/*
* normal write sja1000 register method overloaded to catch when controller
* is started or stopped, to control leds
*/
static void peak_pciec_write_reg(const struct sja1000_priv *priv,
int port, u8 val)
{
struct peak_pci_chan *chan = priv->priv;
struct peak_pciec_card *card = chan->pciec_card;
int c = (priv->reg_base - card->reg_base) / PEAK_PCI_CHAN_SIZE;
/* sja1000 register changes control the leds state */
if (port == REG_MOD)
switch (val) {
case MOD_RM:
/* Reset Mode: set led on */
peak_pciec_set_leds(card, PCA9553_LED(c), PCA9553_ON);
break;
case 0x00:
/* Normal Mode: led slow blinking and start led timer */
peak_pciec_set_leds(card, PCA9553_LED(c), PCA9553_SLOW);
peak_pciec_start_led_work(card);
break;
default:
break;
}
/* call base function */
peak_pci_write_reg(priv, port, val);
}
static struct i2c_algo_bit_data peak_pciec_i2c_bit_ops = {
.setsda = pita_setsda,
.setscl = pita_setscl,
.getsda = pita_getsda,
.getscl = pita_getscl,
.udelay = 10,
.timeout = HZ,
};
static int peak_pciec_probe(struct pci_dev *pdev, struct net_device *dev)
{
struct sja1000_priv *priv = netdev_priv(dev);
struct peak_pci_chan *chan = priv->priv;
struct peak_pciec_card *card;
int err;
/* copy i2c object address from 1st channel */
if (chan->prev_dev) {
struct sja1000_priv *prev_priv = netdev_priv(chan->prev_dev);
struct peak_pci_chan *prev_chan = prev_priv->priv;
card = prev_chan->pciec_card;
if (!card)
return -ENODEV;
/* channel is the first one: do the init part */
} else {
/* create the bit banging I2C adapter structure */
card = kzalloc(sizeof(struct peak_pciec_card), GFP_KERNEL);
if (!card) {
dev_err(&pdev->dev,
"failed allocating memory for i2c chip\n");
return -ENOMEM;
}
card->cfg_base = chan->cfg_base;
card->reg_base = priv->reg_base;
card->led_chip.owner = THIS_MODULE;
card->led_chip.dev.parent = &pdev->dev;
card->led_chip.algo_data = &card->i2c_bit;
strncpy(card->led_chip.name, "peak_i2c",
sizeof(card->led_chip.name));
card->i2c_bit = peak_pciec_i2c_bit_ops;
card->i2c_bit.udelay = 10;
card->i2c_bit.timeout = HZ;
card->i2c_bit.data = card;
peak_pciec_init_pita_gpio(card);
err = i2c_bit_add_bus(&card->led_chip);
if (err) {
dev_err(&pdev->dev, "i2c init failed\n");
goto pciec_init_err_1;
}
err = peak_pciec_init_leds(card);
if (err) {
dev_err(&pdev->dev, "leds hardware init failed\n");
goto pciec_init_err_2;
}
INIT_DELAYED_WORK(&card->led_work, peak_pciec_led_work);
/* PCAN-ExpressCard needs its own callback for leds */
priv->write_reg = peak_pciec_write_reg;
}
chan->pciec_card = card;
card->channel[card->chan_count++].netdev = dev;
return 0;
pciec_init_err_2:
i2c_del_adapter(&card->led_chip);
pciec_init_err_1:
peak_pciec_init_pita_gpio(card);
kfree(card);
return err;
}
static void peak_pciec_remove(struct peak_pciec_card *card)
{
peak_pciec_stop_led_work(card);
peak_pciec_leds_exit(card);
i2c_del_adapter(&card->led_chip);
peak_pciec_init_pita_gpio(card);
kfree(card);
}
#else /* CONFIG_CAN_PEAK_PCIEC */
/*
* Placebo functions when PCAN-ExpressCard support is not selected
*/
static inline int peak_pciec_probe(struct pci_dev *pdev, struct net_device *dev)
{
return -ENODEV;
}
static inline void peak_pciec_remove(struct peak_pciec_card *card)
{
}
#endif /* CONFIG_CAN_PEAK_PCIEC */
static u8 peak_pci_read_reg(const struct sja1000_priv *priv, int port) static u8 peak_pci_read_reg(const struct sja1000_priv *priv, int port)
{ {
return readb(priv->reg_base + (port << 2)); return readb(priv->reg_base + (port << 2));
@ -188,17 +637,31 @@ static int __devinit peak_pci_probe(struct pci_dev *pdev,
SET_NETDEV_DEV(dev, &pdev->dev); SET_NETDEV_DEV(dev, &pdev->dev);
err = register_sja1000dev(dev);
if (err) {
dev_err(&pdev->dev, "failed to register device\n");
free_sja1000dev(dev);
goto failure_remove_channels;
}
/* Create chain of SJA1000 devices */ /* Create chain of SJA1000 devices */
chan->prev_dev = pci_get_drvdata(pdev); chan->prev_dev = pci_get_drvdata(pdev);
pci_set_drvdata(pdev, dev); pci_set_drvdata(pdev, dev);
/*
* PCAN-ExpressCard needs some additional i2c init.
* This must be done *before* register_sja1000dev() but
* *after* devices linkage
*/
if (pdev->device == PEAK_PCIEC_DEVICE_ID) {
err = peak_pciec_probe(pdev, dev);
if (err) {
dev_err(&pdev->dev,
"failed to probe device (err %d)\n",
err);
goto failure_free_dev;
}
}
err = register_sja1000dev(dev);
if (err) {
dev_err(&pdev->dev, "failed to register device\n");
goto failure_free_dev;
}
dev_info(&pdev->dev, dev_info(&pdev->dev,
"%s at reg_base=0x%p cfg_base=0x%p irq=%d\n", "%s at reg_base=0x%p cfg_base=0x%p irq=%d\n",
dev->name, priv->reg_base, chan->cfg_base, dev->irq); dev->name, priv->reg_base, chan->cfg_base, dev->irq);
@ -209,10 +672,15 @@ static int __devinit peak_pci_probe(struct pci_dev *pdev,
return 0; return 0;
failure_free_dev:
pci_set_drvdata(pdev, chan->prev_dev);
free_sja1000dev(dev);
failure_remove_channels: failure_remove_channels:
/* Disable interrupts */ /* Disable interrupts */
writew(0x0, cfg_base + PITA_ICR + 2); writew(0x0, cfg_base + PITA_ICR + 2);
chan = NULL;
for (dev = pci_get_drvdata(pdev); dev; dev = chan->prev_dev) { for (dev = pci_get_drvdata(pdev); dev; dev = chan->prev_dev) {
unregister_sja1000dev(dev); unregister_sja1000dev(dev);
free_sja1000dev(dev); free_sja1000dev(dev);
@ -220,6 +688,10 @@ failure_remove_channels:
chan = priv->priv; chan = priv->priv;
} }
/* free any PCIeC resources too */
if (chan && chan->pciec_card)
peak_pciec_remove(chan->pciec_card);
pci_iounmap(pdev, reg_base); pci_iounmap(pdev, reg_base);
failure_unmap_cfg_base: failure_unmap_cfg_base:
@ -251,8 +723,13 @@ static void __devexit peak_pci_remove(struct pci_dev *pdev)
unregister_sja1000dev(dev); unregister_sja1000dev(dev);
free_sja1000dev(dev); free_sja1000dev(dev);
dev = chan->prev_dev; dev = chan->prev_dev;
if (!dev)
if (!dev) {
/* do that only for first channel */
if (chan->pciec_card)
peak_pciec_remove(chan->pciec_card);
break; break;
}
priv = netdev_priv(dev); priv = netdev_priv(dev);
chan = priv->priv; chan = priv->priv;
} }