X-Git-Url: http://rtime.felk.cvut.cz/gitweb/lincan.git/blobdiff_plain/831ccb1f14f7472962fc2d185f32e18105209bd7..50e9e47fc21191ea9ea758fea1e7f2bd5a275e98:/lincan/src/ssv.c diff --git a/lincan/src/ssv.c b/lincan/src/ssv.c index 17d60ef..530859d 100644 --- a/lincan/src/ssv.c +++ b/lincan/src/ssv.c @@ -1,9 +1,36 @@ -/* ssv.c - * Linux CAN-bus device driver. - * Written by Arnaud Westenberg email:arnaud@casema.net - * This software is released under the GPL-License. - * Version lincan-0.3 17 Jun 2004 - */ +/**************************************************************************/ +/* File: ssv.c - SSV board support */ +/* */ +/* LinCAN - (Not only) Linux CAN bus driver */ +/* Copyright (C) 2002-2009 DCE FEE CTU Prague */ +/* Copyright (C) 2002-2009 Pavel Pisa */ +/* Funded by OCERA and FRESCOR IST projects */ +/* Based on CAN driver code by Arnaud Westenberg */ +/* */ +/* 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" @@ -34,13 +61,13 @@ int ssv_request_io(struct candevice_t *candev) CANMSG("Unable to open port: 0x%lx\n",candev->io_addr); return -ENODEV; } else { - DEBUGMSG("Registered IO-memory: 0x%lx - 0x%lx\n", candev->io_addr, + DEBUGMSG("Registered IO-memory: 0x%lx - 0x%lx\n", candev->io_addr, candev->io_addr + IO_RANGE - 1); } return 0; } -/* The function template_release_io is used to free the previously reserved +/* The function template_release_io is used to free the previously reserved * io-memory. In case you reserved more memory, don't forget to free it here. */ int ssv_release_io(struct candevice_t *candev) @@ -57,7 +84,7 @@ int ssv_release_io(struct candevice_t *candev) */ int ssv_reset(struct candevice_t *candev) { - int i; + int i; DEBUGMSG("Resetting ssv hardware ...\n"); ssv_write_register(1,ssvcan_base+iCPU); @@ -68,7 +95,7 @@ int ssv_reset(struct candevice_t *candev) for (i = 1; i < 1000; i++) udelay (1000); - /* Check hardware reset status */ + /* Check hardware reset status */ i=0; while ( (ssv_read_register(ssvcan_base+iCPU) & iCPU_RST) && (i<=15)) { udelay(20000); @@ -82,7 +109,7 @@ int ssv_reset(struct candevice_t *candev) else DEBUGMSG("Chip0 reset status ok.\n"); - /* Check hardware reset status */ + /* Check hardware reset status */ i=0; while ( (ssv_read_register(ssvcan_base+0x100+iCPU) & iCPU_RST) && (i<=15)) { udelay(20000); @@ -113,7 +140,7 @@ int ssv_reset(struct candevice_t *candev) #define NR_82527 2 #define NR_SJA1000 0 -int ssv_init_hw_data(struct candevice_t *candev) +int ssv_init_hw_data(struct candevice_t *candev) { candev->res_addr=RESET_ADDR; candev->nr_82527_chips=NR_82527; @@ -154,7 +181,7 @@ int ssv_init_chip_data(struct candevice_t *candev, int chipnr) * CAN chip. In case of the sja1000 there's only one message object but on the * i82527 chip there are 15. * The code below is for a i82527 chip and initializes the object base addresses - * The entry obj_base_addr represents the first memory address of the message + * The entry obj_base_addr represents the first memory address of the message * object. In case of the sja1000 obj_base_addr is taken the same as the chips * base address. * Unless the hardware uses a segmented memory map, flags can be set zero. @@ -164,7 +191,7 @@ int ssv_init_obj_data(struct canchip_t *chip, int objnr) chip->msgobj[objnr]->obj_base_addr= chip->chip_base_addr+(objnr+1)*0x10; - + return 0; } @@ -190,7 +217,7 @@ void ssv_write_register(unsigned data, can_ioptr_t address) /* the ssv card has two registers, the address register at 0x0 and the data register at 0x01 */ - /* write the relative address on the eight LSB bits + /* write the relative address on the eight LSB bits and the data on the eight MSB bits in one time */ if((address-ssvcan_base)<0x100) can_outw(address-ssvcan_base + (256 * data), ssvcan_base); @@ -205,12 +232,12 @@ void ssv_write_register(unsigned data, can_ioptr_t address) unsigned ssv_read_register(can_ioptr_t address) { /* this is the same thing that the function write_register. - We use the two register, we write the address where we + We use the two register, we write the address where we want to read in a first time. In a second time we read the data */ unsigned char ret; can_spin_irqflags_t flags; - + if((address-ssvcan_base)<0x100) {