diff options
Diffstat (limited to 'drivers/media/pci/bt8xx/bttv-if.c')
| -rw-r--r-- | drivers/media/pci/bt8xx/bttv-if.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/media/pci/bt8xx/bttv-if.c b/drivers/media/pci/bt8xx/bttv-if.c new file mode 100644 index 000000000000..a6a540dc9e4b --- /dev/null +++ b/drivers/media/pci/bt8xx/bttv-if.c @@ -0,0 +1,121 @@ +/* + + bttv-if.c -- old gpio interface to other kernel modules + don't use in new code, will go away in 2.7 + have a look at bttv-gpio.c instead. + + bttv - Bt848 frame grabber driver + + Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de) + & Marcus Metzler (mocm@thp.uni-koeln.de) + (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program 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 this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +*/ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <asm/io.h> + +#include "bttvp.h" + +EXPORT_SYMBOL(bttv_get_pcidev); +EXPORT_SYMBOL(bttv_gpio_enable); +EXPORT_SYMBOL(bttv_read_gpio); +EXPORT_SYMBOL(bttv_write_gpio); + +/* ----------------------------------------------------------------------- */ +/* Exported functions - for other modules which want to access the */ +/* gpio ports (IR for example) */ +/* see bttv.h for comments */ + +struct pci_dev* bttv_get_pcidev(unsigned int card) +{ + if (card >= bttv_num) + return NULL; + if (!bttvs[card]) + return NULL; + + return bttvs[card]->c.pci; +} + + +int bttv_gpio_enable(unsigned int card, unsigned long mask, unsigned long data) +{ + struct bttv *btv; + + if (card >= bttv_num) { + return -EINVAL; + } + + btv = bttvs[card]; + if (!btv) + return -ENODEV; + + gpio_inout(mask,data); + if (bttv_gpio) + bttv_gpio_tracking(btv,"extern enable"); + return 0; +} + +int bttv_read_gpio(unsigned int card, unsigned long *data) +{ + struct bttv *btv; + + if (card >= bttv_num) { + return -EINVAL; + } + + btv = bttvs[card]; + if (!btv) + return -ENODEV; + + if(btv->shutdown) { + return -ENODEV; + } + +/* prior setting BT848_GPIO_REG_INP is (probably) not needed + because we set direct input on init */ + *data = gpio_read(); + return 0; +} + +int bttv_write_gpio(unsigned int card, unsigned long mask, unsigned long data) +{ + struct bttv *btv; + + if (card >= bttv_num) { + return -EINVAL; + } + + btv = bttvs[card]; + if (!btv) + return -ENODEV; + +/* prior setting BT848_GPIO_REG_INP is (probably) not needed + because direct input is set on init */ + gpio_bits(mask,data); + if (bttv_gpio) + bttv_gpio_tracking(btv,"extern write"); + return 0; +} + +/* + * Local variables: + * c-basic-offset: 8 + * End: + */ |