can: peak_pci: add support of some new PEAK-System PCI cards
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
Marc Kleine-Budde
parent
224223aaf9
commit
e6d9c80b7c
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@ -44,11 +44,23 @@ config CAN_EMS_PCI
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(http://www.ems-wuensche.de).
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config CAN_PEAK_PCI
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tristate "PEAK PCAN PCI/PCIe Cards"
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tristate "PEAK PCAN-PCI/PCIe/miniPCI Cards"
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depends on PCI
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---help---
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This driver is for the PCAN PCI/PCIe cards (1, 2, 3 or 4 channels)
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from PEAK Systems (http://www.peak-system.com).
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This driver is for the PCAN-PCI/PCIe/miniPCI cards
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(1, 2, 3 or 4 channels) from PEAK-System Technik
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(http://www.peak-system.com).
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config CAN_PEAK_PCIEC
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bool "PEAK PCAN-ExpressCard Cards"
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depends on CAN_PEAK_PCI
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select I2C
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select I2C_ALGOBIT
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default y
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---help---
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Say Y here if you want to use a PCAN-ExpressCard from PEAK-System
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Technik. This will also automatically select I2C and I2C_ALGO
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configuration options.
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config CAN_KVASER_PCI
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tristate "Kvaser PCIcanx and Kvaser PCIcan PCI Cards"
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@ -1,5 +1,6 @@
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/*
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* Copyright (C) 2007, 2011 Wolfgang Grandegger <wg@grandegger.com>
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* Copyright (C) 2012 Stephane Grosjean <s.grosjean@peak-system.com>
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*
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* Derived from the PCAN project file driver/src/pcan_pci.c:
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*
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@ -13,10 +14,6 @@
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <linux/kernel.h>
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@ -26,22 +23,26 @@
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <linux/io.h>
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#include <linux/i2c.h>
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#include <linux/i2c-algo-bit.h>
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#include <linux/can.h>
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#include <linux/can/dev.h>
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#include "sja1000.h"
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MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
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MODULE_DESCRIPTION("Socket-CAN driver for PEAK PCAN PCI/PCIe cards");
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MODULE_SUPPORTED_DEVICE("PEAK PCAN PCI/PCIe CAN card");
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MODULE_DESCRIPTION("Socket-CAN driver for PEAK PCAN PCI family cards");
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MODULE_SUPPORTED_DEVICE("PEAK PCAN PCI/PCIe/PCIeC miniPCI CAN cards");
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MODULE_LICENSE("GPL v2");
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#define DRV_NAME "peak_pci"
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struct peak_pciec_card;
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struct peak_pci_chan {
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void __iomem *cfg_base; /* Common for all channels */
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struct net_device *prev_dev; /* Chain of network devices */
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u16 icr_mask; /* Interrupt mask for fast ack */
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struct peak_pciec_card *pciec_card; /* only for PCIeC LEDs */
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};
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#define PEAK_PCI_CAN_CLOCK (16000000 / 2)
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@ -61,16 +62,464 @@ struct peak_pci_chan {
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#define PEAK_PCI_VENDOR_ID 0x001C /* The PCI device and vendor IDs */
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#define PEAK_PCI_DEVICE_ID 0x0001 /* for PCI/PCIe slot cards */
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#define PEAK_PCIEC_DEVICE_ID 0x0002 /* for ExpressCard slot cards */
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#define PEAK_PCIE_DEVICE_ID 0x0003 /* for nextgen PCIe slot cards */
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#define PEAK_MPCI_DEVICE_ID 0x0008 /* The miniPCI slot cards */
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static const u16 peak_pci_icr_masks[] = {0x02, 0x01, 0x40, 0x80};
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#define PEAK_PCI_CHAN_MAX 4
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static const u16 peak_pci_icr_masks[PEAK_PCI_CHAN_MAX] = {
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0x02, 0x01, 0x40, 0x80
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};
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static DEFINE_PCI_DEVICE_TABLE(peak_pci_tbl) = {
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{PEAK_PCI_VENDOR_ID, PEAK_PCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
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{PEAK_PCI_VENDOR_ID, PEAK_PCIE_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
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{PEAK_PCI_VENDOR_ID, PEAK_MPCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
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#ifdef CONFIG_CAN_PEAK_PCIEC
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{PEAK_PCI_VENDOR_ID, PEAK_PCIEC_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
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#endif
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{0,}
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};
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MODULE_DEVICE_TABLE(pci, peak_pci_tbl);
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#ifdef CONFIG_CAN_PEAK_PCIEC
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/*
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* PCAN-ExpressCard needs I2C bit-banging configuration option.
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*/
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/* GPIOICR byte access offsets */
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#define PITA_GPOUT 0x18 /* GPx output value */
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#define PITA_GPIN 0x19 /* GPx input value */
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#define PITA_GPOEN 0x1A /* configure GPx as ouput pin */
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/* I2C GP bits */
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#define PITA_GPIN_SCL 0x01 /* Serial Clock Line */
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#define PITA_GPIN_SDA 0x04 /* Serial DAta line */
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#define PCA9553_1_SLAVEADDR (0xC4 >> 1)
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/* PCA9553 LS0 fields values */
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enum {
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PCA9553_LOW,
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PCA9553_HIGHZ,
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PCA9553_PWM0,
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PCA9553_PWM1
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};
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/* LEDs control */
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#define PCA9553_ON PCA9553_LOW
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#define PCA9553_OFF PCA9553_HIGHZ
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#define PCA9553_SLOW PCA9553_PWM0
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#define PCA9553_FAST PCA9553_PWM1
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#define PCA9553_LED(c) (1 << (c))
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#define PCA9553_LED_STATE(s, c) ((s) << ((c) << 1))
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#define PCA9553_LED_ON(c) PCA9553_LED_STATE(PCA9553_ON, c)
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#define PCA9553_LED_OFF(c) PCA9553_LED_STATE(PCA9553_OFF, c)
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#define PCA9553_LED_SLOW(c) PCA9553_LED_STATE(PCA9553_SLOW, c)
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#define PCA9553_LED_FAST(c) PCA9553_LED_STATE(PCA9553_FAST, c)
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#define PCA9553_LED_MASK(c) PCA9553_LED_STATE(0x03, c)
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#define PCA9553_LED_OFF_ALL (PCA9553_LED_OFF(0) | PCA9553_LED_OFF(1))
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#define PCA9553_LS0_INIT 0x40 /* initial value (!= from 0x00) */
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struct peak_pciec_chan {
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struct net_device *netdev;
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unsigned long prev_rx_bytes;
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unsigned long prev_tx_bytes;
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};
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struct peak_pciec_card {
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void __iomem *cfg_base; /* Common for all channels */
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void __iomem *reg_base; /* first channel base address */
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u8 led_cache; /* leds state cache */
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/* PCIExpressCard i2c data */
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struct i2c_algo_bit_data i2c_bit;
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struct i2c_adapter led_chip;
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struct delayed_work led_work; /* led delayed work */
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int chan_count;
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struct peak_pciec_chan channel[PEAK_PCI_CHAN_MAX];
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};
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/* "normal" pci register write callback is overloaded for leds control */
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static void peak_pci_write_reg(const struct sja1000_priv *priv,
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int port, u8 val);
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static inline void pita_set_scl_highz(struct peak_pciec_card *card)
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{
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u8 gp_outen = readb(card->cfg_base + PITA_GPOEN) & ~PITA_GPIN_SCL;
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writeb(gp_outen, card->cfg_base + PITA_GPOEN);
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}
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static inline void pita_set_sda_highz(struct peak_pciec_card *card)
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{
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u8 gp_outen = readb(card->cfg_base + PITA_GPOEN) & ~PITA_GPIN_SDA;
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writeb(gp_outen, card->cfg_base + PITA_GPOEN);
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}
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static void peak_pciec_init_pita_gpio(struct peak_pciec_card *card)
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{
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/* raise SCL & SDA GPIOs to high-Z */
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pita_set_scl_highz(card);
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pita_set_sda_highz(card);
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}
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static void pita_setsda(void *data, int state)
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{
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struct peak_pciec_card *card = (struct peak_pciec_card *)data;
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u8 gp_out, gp_outen;
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/* set output sda always to 0 */
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gp_out = readb(card->cfg_base + PITA_GPOUT) & ~PITA_GPIN_SDA;
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writeb(gp_out, card->cfg_base + PITA_GPOUT);
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/* control output sda with GPOEN */
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gp_outen = readb(card->cfg_base + PITA_GPOEN);
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if (state)
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gp_outen &= ~PITA_GPIN_SDA;
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else
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gp_outen |= PITA_GPIN_SDA;
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writeb(gp_outen, card->cfg_base + PITA_GPOEN);
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}
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static void pita_setscl(void *data, int state)
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{
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struct peak_pciec_card *card = (struct peak_pciec_card *)data;
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u8 gp_out, gp_outen;
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/* set output scl always to 0 */
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gp_out = readb(card->cfg_base + PITA_GPOUT) & ~PITA_GPIN_SCL;
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writeb(gp_out, card->cfg_base + PITA_GPOUT);
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/* control output scl with GPOEN */
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gp_outen = readb(card->cfg_base + PITA_GPOEN);
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if (state)
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gp_outen &= ~PITA_GPIN_SCL;
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else
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gp_outen |= PITA_GPIN_SCL;
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writeb(gp_outen, card->cfg_base + PITA_GPOEN);
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}
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static int pita_getsda(void *data)
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{
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struct peak_pciec_card *card = (struct peak_pciec_card *)data;
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/* set tristate */
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pita_set_sda_highz(card);
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return (readb(card->cfg_base + PITA_GPIN) & PITA_GPIN_SDA) ? 1 : 0;
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}
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static int pita_getscl(void *data)
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{
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struct peak_pciec_card *card = (struct peak_pciec_card *)data;
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/* set tristate */
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pita_set_scl_highz(card);
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return (readb(card->cfg_base + PITA_GPIN) & PITA_GPIN_SCL) ? 1 : 0;
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}
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/*
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* write commands to the LED chip though the I2C-bus of the PCAN-PCIeC
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*/
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static int peak_pciec_write_pca9553(struct peak_pciec_card *card,
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u8 offset, u8 data)
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{
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u8 buffer[2] = {
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offset,
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data
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};
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struct i2c_msg msg = {
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.addr = PCA9553_1_SLAVEADDR,
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.len = 2,
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.buf = buffer,
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};
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int ret;
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/* cache led mask */
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if ((offset == 5) && (data == card->led_cache))
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return 0;
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ret = i2c_transfer(&card->led_chip, &msg, 1);
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if (ret < 0)
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return ret;
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if (offset == 5)
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card->led_cache = data;
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return 0;
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}
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/*
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* delayed work callback used to control the LEDs
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*/
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static void peak_pciec_led_work(struct work_struct *work)
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{
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struct peak_pciec_card *card =
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container_of(work, struct peak_pciec_card, led_work.work);
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struct net_device *netdev;
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u8 new_led = card->led_cache;
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int i, up_count = 0;
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/* first check what is to do */
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for (i = 0; i < card->chan_count; i++) {
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/* default is: not configured */
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new_led &= ~PCA9553_LED_MASK(i);
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new_led |= PCA9553_LED_ON(i);
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netdev = card->channel[i].netdev;
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if (!netdev || !(netdev->flags & IFF_UP))
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continue;
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up_count++;
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/* no activity (but configured) */
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new_led &= ~PCA9553_LED_MASK(i);
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new_led |= PCA9553_LED_SLOW(i);
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/* if bytes counters changed, set fast blinking led */
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if (netdev->stats.rx_bytes != card->channel[i].prev_rx_bytes) {
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card->channel[i].prev_rx_bytes = netdev->stats.rx_bytes;
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new_led &= ~PCA9553_LED_MASK(i);
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new_led |= PCA9553_LED_FAST(i);
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}
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if (netdev->stats.tx_bytes != card->channel[i].prev_tx_bytes) {
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card->channel[i].prev_tx_bytes = netdev->stats.tx_bytes;
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new_led &= ~PCA9553_LED_MASK(i);
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new_led |= PCA9553_LED_FAST(i);
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}
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}
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/* check if LS0 settings changed, only update i2c if so */
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peak_pciec_write_pca9553(card, 5, new_led);
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/* restart timer (except if no more configured channels) */
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if (up_count)
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schedule_delayed_work(&card->led_work, HZ);
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}
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/*
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* set LEDs blinking state
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*/
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static void peak_pciec_set_leds(struct peak_pciec_card *card, u8 led_mask, u8 s)
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{
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u8 new_led = card->led_cache;
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int i;
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/* first check what is to do */
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for (i = 0; i < card->chan_count; i++)
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if (led_mask & PCA9553_LED(i)) {
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new_led &= ~PCA9553_LED_MASK(i);
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new_led |= PCA9553_LED_STATE(s, i);
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}
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/* check if LS0 settings changed, only update i2c if so */
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peak_pciec_write_pca9553(card, 5, new_led);
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}
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/*
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* start one second delayed work to control LEDs
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*/
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static void peak_pciec_start_led_work(struct peak_pciec_card *card)
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{
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if (!delayed_work_pending(&card->led_work))
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schedule_delayed_work(&card->led_work, HZ);
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}
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/*
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* stop LEDs delayed work
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*/
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static void peak_pciec_stop_led_work(struct peak_pciec_card *card)
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{
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cancel_delayed_work_sync(&card->led_work);
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}
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/*
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* initialize the PCA9553 4-bit I2C-bus LED chip
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*/
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static int peak_pciec_init_leds(struct peak_pciec_card *card)
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{
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int err;
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/* prescaler for frequency 0: "SLOW" = 1 Hz = "44" */
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err = peak_pciec_write_pca9553(card, 1, 44 / 1);
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if (err)
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return err;
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/* duty cycle 0: 50% */
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err = peak_pciec_write_pca9553(card, 2, 0x80);
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if (err)
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return err;
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/* prescaler for frequency 1: "FAST" = 5 Hz */
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err = peak_pciec_write_pca9553(card, 3, 44 / 5);
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if (err)
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return err;
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/* duty cycle 1: 50% */
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err = peak_pciec_write_pca9553(card, 4, 0x80);
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if (err)
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return err;
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/* switch LEDs to initial state */
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return peak_pciec_write_pca9553(card, 5, PCA9553_LS0_INIT);
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}
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/*
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* restore LEDs state to off peak_pciec_leds_exit
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*/
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static void peak_pciec_leds_exit(struct peak_pciec_card *card)
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{
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/* switch LEDs to off */
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peak_pciec_write_pca9553(card, 5, PCA9553_LED_OFF_ALL);
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}
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/*
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* normal write sja1000 register method overloaded to catch when controller
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* is started or stopped, to control leds
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*/
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static void peak_pciec_write_reg(const struct sja1000_priv *priv,
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int port, u8 val)
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{
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struct peak_pci_chan *chan = priv->priv;
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struct peak_pciec_card *card = chan->pciec_card;
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int c = (priv->reg_base - card->reg_base) / PEAK_PCI_CHAN_SIZE;
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/* sja1000 register changes control the leds state */
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if (port == REG_MOD)
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switch (val) {
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case MOD_RM:
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/* Reset Mode: set led on */
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peak_pciec_set_leds(card, PCA9553_LED(c), PCA9553_ON);
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break;
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case 0x00:
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/* Normal Mode: led slow blinking and start led timer */
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peak_pciec_set_leds(card, PCA9553_LED(c), PCA9553_SLOW);
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peak_pciec_start_led_work(card);
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break;
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default:
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break;
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}
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/* call base function */
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||||
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)
|
||||
{
|
||||
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);
|
||||
|
||||
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 */
|
||||
chan->prev_dev = pci_get_drvdata(pdev);
|
||||
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,
|
||||
"%s at reg_base=0x%p cfg_base=0x%p irq=%d\n",
|
||||
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;
|
||||
|
||||
failure_free_dev:
|
||||
pci_set_drvdata(pdev, chan->prev_dev);
|
||||
free_sja1000dev(dev);
|
||||
|
||||
failure_remove_channels:
|
||||
/* Disable interrupts */
|
||||
writew(0x0, cfg_base + PITA_ICR + 2);
|
||||
|
||||
chan = NULL;
|
||||
for (dev = pci_get_drvdata(pdev); dev; dev = chan->prev_dev) {
|
||||
unregister_sja1000dev(dev);
|
||||
free_sja1000dev(dev);
|
||||
|
|
@ -220,6 +688,10 @@ failure_remove_channels:
|
|||
chan = priv->priv;
|
||||
}
|
||||
|
||||
/* free any PCIeC resources too */
|
||||
if (chan && chan->pciec_card)
|
||||
peak_pciec_remove(chan->pciec_card);
|
||||
|
||||
pci_iounmap(pdev, reg_base);
|
||||
|
||||
failure_unmap_cfg_base:
|
||||
|
|
@ -251,8 +723,13 @@ static void __devexit peak_pci_remove(struct pci_dev *pdev)
|
|||
unregister_sja1000dev(dev);
|
||||
free_sja1000dev(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;
|
||||
}
|
||||
priv = netdev_priv(dev);
|
||||
chan = priv->priv;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue