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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 | // SPDX-License-Identifier: GPL-2.0-or-later /* 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> */ #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; } |