X-Git-Url: http://rtime.felk.cvut.cz/gitweb/lincan.git/blobdiff_plain/4ee1fa3f095f7da94c8996d3f499273ff84c9023..b18e586453cf962a4032890f34d05a9fd362cf02:/lincan/src/mpc5200.c

diff --git a/lincan/src/mpc5200.c b/lincan/src/mpc5200.c
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+/**************************************************************************/
+/* File: mpc5200.c - Freescale MPC5200 MSCAN controller support           */
+/*                                                                        */
+/* LinCAN - (Not only) Linux CAN bus driver                               */
+/* Copyright (C) 2002-2009 DCE FEE CTU Prague <http://dce.felk.cvut.cz>   */
+/* Copyright (C) 2002-2009 Pavel Pisa <pisa@cmp.felk.cvut.cz>             */
+/* Copyright (C) 2007-2008 Martin Petera <peterm4@fel.cvut.cz>            */
+/* Funded by OCERA and FRESCOR IST projects                               */
+/* Based on CAN driver code by Arnaud Westenberg <arnaud@wanadoo.nl>      */
+/*                                                                        */
+/* LinCAN is free software; you can redistribute it and/or modify it      */
+/* under terms of the GNU General Public License as published by the      */
+/* Free Software Foundation; either version 2, or (at your option) any    */
+/* later version.  LinCAN 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 LinCAN; see file     */
+/* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave,  */
+/* Cambridge, MA 02139, USA.                                              */
+/*                                                                        */
+/* To allow use of LinCAN in the compact embedded systems firmware        */
+/* and RT-executives (RTEMS for example), main authors agree with next    */
+/* special exception:                                                     */
+/*                                                                        */
+/* Including LinCAN header files in a file, instantiating LinCAN generics */
+/* or templates, or linking other files with LinCAN objects to produce    */
+/* an application image/executable, does not by itself cause the          */
+/* resulting application image/executable to be covered by                */
+/* the GNU General Public License.                                        */
+/* This exception does not however invalidate any other reasons           */
+/* why the executable file might be covered by the GNU Public License.    */
+/* Publication of enhanced or derived LinCAN files is required although.  */
+/**************************************************************************/
+
+#include "../include/can.h"
+#include "../include/can_sysdep.h"
+#include "../include/main.h"
+#include "../include/mpc5200.h"
+#include "../include/mscan.h"
+
+int mpc5200_request_io(struct candevice_t *candev)
+{
+	if (!can_request_io_region(candev->io_addr, candev->nr_all_chips * IO_RANGE, DEVICE_NAME)) {
+		CANMSG("Unable to open port: 0x%lx\n",candev->io_addr);
+		return -ENODEV;
+	}
+
+	DEBUGMSG("Registered IO-memory: 0x%lx - 0x%lx\n", candev->io_addr, candev->io_addr + candev->nr_all_chips * IO_RANGE - 1);
+	return 0;
+}
+
+int mpc5200_release_io(struct candevice_t *candev)
+{
+	can_release_io_region(candev->io_addr, candev->nr_all_chips * IO_RANGE);
+
+	return 0;
+}
+
+int mpc5200_reset(struct candevice_t *candev)
+{
+	int i; 
+	DEBUGMSG("Resetting MSCAN chips ...\n");
+
+	for (i = 0; i < candev->nr_all_chips; i++)
+	{
+	    /* !!! Assuming this card has ONLY MSCAN chips !!! */
+	    if (mscan_reset_chip(candev->chip[i])) return -ENODEV;
+	}
+
+	return 0;
+}
+
+int mpc5200_init_hw_data(struct candevice_t *candev) 
+{
+	/* candev->res_addr = RESET_ADDR; */
+	candev->nr_82527_chips = NR_82527;
+	candev->nr_sja1000_chips = NR_SJA1000;
+	candev->nr_all_chips = NR_ALL;
+	/* candev->flags |= CANDEV_PROGRAMMABLE_IRQ; */
+
+	return 0;
+}
+int mpc5200_init_chip_data(struct candevice_t *candev, int chipnr)
+{
+	mscan_fill_chipspecops(candev->chip[chipnr]);
+
+	candev->chip[chipnr]->chip_base_addr = can_ioport2ioptr(candev->io_addr) + chipnr * MPC5200_CAN_CHIP_OFFSET; /* one chip with 2 interfaces */
+	candev->chip[chipnr]->clock = MPC5200_CLK_FREQ;
+	candev->chip[chipnr]->chip_irq = MPC5200_CAN_IRQ + chipnr;
+	candev->chip[chipnr]->hostdevice = candev;
+
+	return 0;
+}
+
+int mpc5200_init_obj_data(struct canchip_t *chip, int objnr)
+{
+	/* we have only two chips with only one mailbox each */
+	chip->msgobj[objnr]->obj_base_addr = (can_ioptr_t) MSCAN_CTL0 + MPC5200_CAN_CHIP_OFFSET * objnr;
+
+	return 0;
+}
+
+int mpc5200_program_irq(struct candevice_t *candev)
+{
+	/* we  don't use programmable interrupt on MPC5200 */ 
+	return 0;
+}
+
+
+void mpc5200_write_register(unsigned data, can_ioptr_t address)
+{
+	/* address is an absolute address */
+	DEBUGMSG("write register\n");
+	writeb(data, address);		/* regs in PowerPC (5200) are one-byte length */
+}
+
+unsigned mpc5200_read_register(can_ioptr_t address)
+{
+	/* address is an absolute address */
+	DEBUGMSG("read register\n");
+	return readb(address);		/* regs in PowerPC (5200) are one-byte length */
+}
+
+int mpc5200_register(struct hwspecops_t *hwspecops)
+{
+	hwspecops->request_io = mpc5200_request_io;
+	hwspecops->release_io = mpc5200_release_io;
+	hwspecops->reset = mpc5200_reset;
+	hwspecops->init_hw_data = mpc5200_init_hw_data;
+	hwspecops->init_chip_data = mpc5200_init_chip_data;
+	hwspecops->init_obj_data = mpc5200_init_obj_data;
+	hwspecops->program_irq = mpc5200_program_irq;
+	hwspecops->write_register = mpc5200_write_register;
+	hwspecops->read_register = mpc5200_read_register;
+	return 0;
+}