/* bttv-if.c -- interfaces to other kernel modules all the i2c code is here also the gpio interface exported by bttv (used by lirc) 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) 1999,2000 Gerd Knorr 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. */ #define __NO_VERSION__ 1 #include #include #include #include #include "bttvp.h" #include "tuner.h" static struct i2c_algo_bit_data bttv_i2c_algo_template; static struct i2c_adapter bttv_i2c_adap_template; static struct i2c_client bttv_i2c_client_template; EXPORT_SYMBOL(bttv_get_cardinfo); EXPORT_SYMBOL(bttv_get_id); EXPORT_SYMBOL(bttv_gpio_enable); EXPORT_SYMBOL(bttv_read_gpio); EXPORT_SYMBOL(bttv_write_gpio); EXPORT_SYMBOL(bttv_get_gpio_queue); /* ----------------------------------------------------------------------- */ /* Exported functions - for other modules which want to access the */ /* gpio ports (IR for example) */ /* see bttv.h for comments */ int bttv_get_cardinfo(unsigned int card, int *type, int *cardid) { if (card >= bttv_num) { return -1; } *type = bttvs[card].type; *cardid = bttvs[card].cardid; return 0; } int bttv_get_id(unsigned int card) { printk("bttv_get_id is obsolete, use bttv_get_cardinfo instead\n"); if (card >= bttv_num) { return -1; } return bttvs[card].type; } 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]; btaor(data, ~mask, BT848_GPIO_OUT_EN); 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->shutdown) { return -ENODEV; } /* prior setting BT848_GPIO_REG_INP is (probably) not needed because we set direct input on init */ *data = btread(BT848_GPIO_DATA); 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]; /* prior setting BT848_GPIO_REG_INP is (probably) not needed because direct input is set on init */ btaor(data & mask, ~mask, BT848_GPIO_DATA); if (bttv_gpio) bttv_gpio_tracking(btv,"extern write"); return 0; } wait_queue_head_t* bttv_get_gpio_queue(unsigned int card) { struct bttv *btv; if (card >= bttv_num) { return NULL; } btv = &bttvs[card]; if (bttvs[card].shutdown) { return NULL; } return &btv->gpioq; } /* ----------------------------------------------------------------------- */ /* I2C functions */ void bttv_bit_setscl(void *data, int state) { struct bttv *btv = (struct bttv*)data; if (state) btv->i2c_state |= 0x02; else btv->i2c_state &= ~0x02; btwrite(btv->i2c_state, BT848_I2C); btread(BT848_I2C); } void bttv_bit_setsda(void *data, int state) { struct bttv *btv = (struct bttv*)data; if (state) btv->i2c_state |= 0x01; else btv->i2c_state &= ~0x01; btwrite(btv->i2c_state, BT848_I2C); btread(BT848_I2C); } static int bttv_bit_getscl(void *data) { struct bttv *btv = (struct bttv*)data; int state; state = btread(BT848_I2C) & 0x02 ? 1 : 0; return state; } static int bttv_bit_getsda(void *data) { struct bttv *btv = (struct bttv*)data; int state; state = btread(BT848_I2C) & 0x01; return state; } static void bttv_inc_use(struct i2c_adapter *adap) { MOD_INC_USE_COUNT; } static void bttv_dec_use(struct i2c_adapter *adap) { MOD_DEC_USE_COUNT; } static int attach_inform(struct i2c_client *client) { struct bttv *btv = (struct bttv*)client->adapter->data; int i; for (i = 0; i < I2C_CLIENTS_MAX; i++) { if (btv->i2c_clients[i] == NULL) { btv->i2c_clients[i] = client; break; } } if (btv->tuner_type != -1) bttv_call_i2c_clients(btv,TUNER_SET_TYPE,&btv->tuner_type); if (bttv_verbose) printk("bttv%d: i2c attach [client=%s,%s]\n",btv->nr, client->name, (i < I2C_CLIENTS_MAX) ? "ok" : "failed"); return 0; } static int detach_inform(struct i2c_client *client) { struct bttv *btv = (struct bttv*)client->adapter->data; int i; for (i = 0; i < I2C_CLIENTS_MAX; i++) { if (btv->i2c_clients[i] == client) { btv->i2c_clients[i] = NULL; break; } } if (bttv_verbose) printk("bttv%d: i2c detach [client=%s,%s]\n",btv->nr, client->name, (i < I2C_CLIENTS_MAX) ? "ok" : "failed"); return 0; } void bttv_call_i2c_clients(struct bttv *btv, unsigned int cmd, void *arg) { int i; for (i = 0; i < I2C_CLIENTS_MAX; i++) { if (NULL == btv->i2c_clients[i]) continue; if (NULL == btv->i2c_clients[i]->driver->command) continue; btv->i2c_clients[i]->driver->command( btv->i2c_clients[i],cmd,arg); } } static struct i2c_algo_bit_data bttv_i2c_algo_template = { setsda: bttv_bit_setsda, setscl: bttv_bit_setscl, getsda: bttv_bit_getsda, getscl: bttv_bit_getscl, udelay: 16, mdelay: 10, timeout: 200, }; static struct i2c_adapter bttv_i2c_adap_template = { name: "bt848", id: I2C_HW_B_BT848, inc_use: bttv_inc_use, dec_use: bttv_dec_use, client_register: attach_inform, client_unregister: detach_inform, }; static struct i2c_client bttv_i2c_client_template = { name: "bttv internal use only", id: -1, }; /* read I2C */ int bttv_I2CRead(struct bttv *btv, unsigned char addr, char *probe_for) { unsigned char buffer = 0; if (0 != btv->i2c_rc) return -1; if (bttv_verbose && NULL != probe_for) printk(KERN_INFO "bttv%d: i2c: checking for %s @ 0x%02x... ", btv->nr,probe_for,addr); btv->i2c_client.addr = addr >> 1; if (1 != i2c_master_recv(&btv->i2c_client, &buffer, 1)) { if (NULL != probe_for) { if (bttv_verbose) printk("not found\n"); } else printk(KERN_WARNING "bttv%d: i2c read 0x%x: error\n", btv->nr,addr); return -1; } if (bttv_verbose && NULL != probe_for) printk("found\n"); return buffer; } /* write I2C */ int bttv_I2CWrite(struct bttv *btv, unsigned char addr, unsigned char b1, unsigned char b2, int both) { unsigned char buffer[2]; int bytes = both ? 2 : 1; if (0 != btv->i2c_rc) return -1; btv->i2c_client.addr = addr >> 1; buffer[0] = b1; buffer[1] = b2; if (bytes != i2c_master_send(&btv->i2c_client, buffer, bytes)) return -1; return 0; } /* read EEPROM content */ void __devinit bttv_readee(struct bttv *btv, unsigned char *eedata, int addr) { int i; if (bttv_I2CWrite(btv, addr, 0, -1, 0) printk(KERN_WARNING "bttv: readee error\n"); return; } btv->i2c_client.addr = addr >> 1; for (i=0; i if (16 != i2c_master_recv(&btv->i2c_client,eedata+i,16)) { printk(KERN_WARNING "bttv: readee error\n"); break; } } } /* init + register i2c algo-bit adapter */ int __devinit init_bttv_i2c(struct bttv *btv) { memcpy(&btv->i2c_adap, &bttv_i2c_adap_template, sizeof(struct i2c_adapter)); memcpy(&btv->i2c_algo, &bttv_i2c_algo_template, sizeof(struct i2c_algo_bit_data)); memcpy(&btv->i2c_client, &bttv_i2c_client_template, sizeof(struct i2c_client)); sprintf(btv->i2c_adap.name+strlen(btv->i2c_adap.name), " #%d", btv->nr); btv->i2c_algo.data = btv; btv->i2c_adap.data = btv; btv->i2c_adap.algo_data = &btv->i2c_algo; btv->i2c_client.adapter = &btv->i2c_adap; bttv_bit_setscl(btv,1); bttv_bit_setsda(btv,1); btv->i2c_rc = i2c_bit_add_bus(&btv->i2c_adap); return btv->i2c_rc; } /* * Local variables: * c-basic-offset: 8 * End: */
