diff options
Diffstat (limited to 'drivers/net/can/old/hal/io.c')
| -rw-r--r-- | drivers/net/can/old/hal/io.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/drivers/net/can/old/hal/io.c b/drivers/net/can/old/hal/io.c new file mode 100644 index 000000000000..85e3b1edc1bc --- /dev/null +++ b/drivers/net/can/old/hal/io.c @@ -0,0 +1,123 @@ +/* + * io.c - linear register access CAN hardware abstraction layer + * + * Inspired by the OCAN driver http://ar.linux.it/software/#ocan + * + * Copyright (c) 2002-2007 Volkswagen Group Electronic Research + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Volkswagen nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * Alternatively, provided that this notice is retained in full, this + * software may be distributed under the terms of the GNU General + * Public License ("GPL") version 2, in which case the provisions of the + * GPL apply INSTEAD OF those given above. + * + * The provided data structures and external interfaces from this code + * are not restricted to be used by modules with a GPL compatible license. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * Send feedback to <socketcan-users@lists.berlios.de> + * + */ + +#include <linux/netdevice.h> +#include <linux/ioport.h> +#include <asm/io.h> +#include "hal.h" + +/* init the HAL - call at driver module init */ +int hal_init(void) { return 0; } + +/* exit the HAL - call at driver module exit */ +int hal_exit(void) { return 0; } + +/* get name of this CAN HAL */ +char *hal_name(void) { return "io"; } + +/* fill arrays base[] and irq[] with HAL specific defaults */ +void hal_use_defaults(void) +{ + extern unsigned long base[]; + extern unsigned int irq[]; + + base[0] = 0x2C0UL; + irq[0] = 10; + + base[1] = 0x320UL; + irq[1] = 5; +} + +/* request controller register access space */ +int hal_request_region(int dev_num, + unsigned int num_regs, + char *drv_name) +{ + extern unsigned long base[]; + extern unsigned long rbase[]; + + /* set for device base_addr */ + rbase[dev_num] = base[dev_num]; + + /* creating the region for IO is pretty easy */ + return (request_region(base[dev_num], num_regs, drv_name))? 1 : 0; +} + +/* release controller register access space */ +void hal_release_region(int dev_num, + unsigned int num_regs) +{ + extern unsigned long base[]; + + release_region(base[dev_num], num_regs); +} + +/* enable non controller hardware (e.g. irq routing, etc.) */ +int hw_attach(int dev_num) { return 0; } + +/* disable non controller hardware (e.g. irq routing, etc.) */ +int hw_detach(int dev_num) { return 0; } + +/* reset controller hardware (with specific non controller hardware) */ +int hw_reset_dev(int dev_num) { return 0; } + +/* read from controller register */ +u8 hw_readreg(unsigned long base, int reg) { + + return inb(base + reg); +} + +/* write to controller register */ +void hw_writereg(unsigned long base, int reg, u8 val) { + + outb(val, base + reg); +} + +/* hardware specific work to do at start of irq handler */ +void hw_preirq(struct net_device *dev) { return; } + +/* hardware specific work to do at end of irq handler */ +void hw_postirq(struct net_device *dev) { return; } + |