The original version of Arnaud Westenberg Linux CAN-bus driver

[lincan.git] / lincan / src / ioctl.c

diff --git a/lincan/src/ioctl.c b/lincan/src/ioctl.c
new file mode 100644 (file)
index 0000000..0f54c86
--- /dev/null
+++ b/lincan/src/ioctl.c
@@ -0,0 +1,120 @@
+/* ioctl.c
+ * Linux CAN-bus device driver.
+ * Written by Arnaud Westenberg email:arnaud@wanadoo.nl
+ * This software is released under the GPL-License.
+ * Version 0.7  6 Aug 2001
+ */
+
+#include <linux/autoconf.h>
+#if defined (CONFIG_MODVERSIONS) && !defined (MODVERSIONS)
+#define MODVERSIONS
+#endif
+
+#if defined (MODVERSIONS)
+#include <linux/modversions.h>
+#endif
+
+#include <linux/fs.h>
+#include <linux/version.h>
+
+#include "../include/main.h"
+#include "../include/ioctl.h"
+#include "../include/i82527.h"
+
+int can_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+       int i=0;
+       unsigned short channel=0;
+       unsigned btr0=0, btr1=0;
+       struct msgobj_t *obj;
+       struct chip_t *chip = objects_p[MINOR_NR]->hostchip;
+       struct canfifo_t *fifo = objects_p[MINOR_NR]->fifo;
+
+       /* Initialize hardware pointers */
+       if ( (obj = objects_p[MINOR_NR]) == NULL) {
+               CANMSG("Could not assign buffer structure\n");
+               return -1;
+       }
+       if ( (chip = obj->hostchip) == NULL) {
+               CANMSG("Device is not correctly configured.\n");
+               CANMSG("Please reload the driver.\n");
+               return -1;
+       }
+
+       switch (cmd) {
+               case STAT: {
+                       for (i=0x0; i<0x100; i++)
+                               CANMSG("0x%x is 0x%x\n",i,can_read_reg(chip,i));
+                       break;
+               }
+               case CMD_START: {
+                       if (chips_p[arg]->chipspecops->start_chip(chip))
+                               return -1;
+                       break;
+               }
+               case CMD_STOP: {
+                       if (chips_p[arg]->chipspecops->stop_chip(chip))
+                               return -1;
+                       break;
+               }
+               case CONF_FILTER: {
+                       if (!strcmp(chip->chip_type,"i82527")) {
+                       
+                               unsigned char id1, id0;
+                               id1 = (unsigned char) (arg << 5);
+                               id0 = (unsigned char) (arg >> 3);
+
+                               DEBUGMSG("configuring ID=%lx in message object:
+                                                %02x, %02x\n", arg, id0, id1);
+                               can_write_reg(chip,id1,MSG_OFFSET(obj->object) +
+                                                               iMSGID1);
+                               can_write_reg(chip,id0,MSG_OFFSET(obj->object) +
+                                                               iMSGID0);
+                       }
+
+                       /* In- and output buffer re-initialization */
+                       
+                       fifo->tx_readp = fifo->buf_tx_entry;
+                       fifo->tx_writep = fifo->buf_tx_entry;
+                       fifo->rx_readp = fifo->buf_rx_entry;
+                       fifo->rx_writep = fifo->buf_rx_entry;
+                       fifo->rx_size= MAX_BUF_LENGTH * sizeof(struct canmsg_t);
+                       fifo->tx_size = fifo->rx_size;
+
+                       #if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,2,19))
+                               init_waitqueue(&fifo->readq);
+                               init_waitqueue(&fifo->writeq);
+                       #else
+                               init_waitqueue_head(&fifo->readq);
+                               init_waitqueue_head(&fifo->writeq);
+                       #endif
+
+                       fifo->rx_in_progress = 0;
+                       fifo->tx_in_progress = 0;
+
+                       fifo->head = fifo->tail = 0; //TEMP!!
+                       
+                       break;
+               }
+
+               case CONF_BAUD: {
+                       channel = arg & 0xff;
+                       btr0 = (arg >> 8) & 0xff;
+                       btr1 = (arg >> 16) & 0xff;
+
+                       if (chips_p[channel]->chipspecops->set_btregs(chip,
+                                                               btr0, btr1)) {
+                               CANMSG("Error setting bit timing registers\n");
+                               return -1;
+                       }
+                       break;
+               }
+               default: {
+                       CANMSG("Not a valid ioctl command\n");
+                       return -EINVAL;
+               }
+               
+       }
+
+       return 0;
+}