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author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-14 18:49:09 +0400 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-15 23:35:54 +0400 |
commit | 68de959f773a1d49096835c411390bceff5d1549 (patch) | |
tree | 99f48fd448c97981b1793f426e28df0d54d880bf /drivers/media/video/bt8xx/bttv-i2c.c | |
parent | 0aa77f6c2954896b132f8b6f2e9f063c52800913 (diff) | |
download | linux-68de959f773a1d49096835c411390bceff5d1549.tar.xz |
[media] bt8xx: move analog TV part to be together with DTV one
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/bt8xx/bttv-i2c.c')
-rw-r--r-- | drivers/media/video/bt8xx/bttv-i2c.c | 397 |
1 files changed, 0 insertions, 397 deletions
diff --git a/drivers/media/video/bt8xx/bttv-i2c.c b/drivers/media/video/bt8xx/bttv-i2c.c deleted file mode 100644 index 580c8e682392..000000000000 --- a/drivers/media/video/bt8xx/bttv-i2c.c +++ /dev/null @@ -1,397 +0,0 @@ -/* - - bttv-i2c.c -- all the i2c code is here - - 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> - - (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org> - - Multituner support and i2c address binding - - 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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/delay.h> - -#include "bttvp.h" -#include <media/v4l2-common.h> -#include <linux/jiffies.h> -#include <asm/io.h> - -static int i2c_debug; -static int i2c_hw; -static int i2c_scan; -module_param(i2c_debug, int, 0644); -MODULE_PARM_DESC(i2c_debug, "configure i2c debug level"); -module_param(i2c_hw, int, 0444); -MODULE_PARM_DESC(i2c_hw,"force use of hardware i2c support, " - "instead of software bitbang"); -module_param(i2c_scan, int, 0444); -MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time"); - -static unsigned int i2c_udelay = 5; -module_param(i2c_udelay, int, 0444); -MODULE_PARM_DESC(i2c_udelay,"soft i2c delay at insmod time, in usecs " - "(should be 5 or higher). Lower value means higher bus speed."); - -/* ----------------------------------------------------------------------- */ -/* I2C functions - bitbanging adapter (software i2c) */ - -static 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); -} - -static 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 struct i2c_algo_bit_data __devinitdata bttv_i2c_algo_bit_template = { - .setsda = bttv_bit_setsda, - .setscl = bttv_bit_setscl, - .getsda = bttv_bit_getsda, - .getscl = bttv_bit_getscl, - .udelay = 16, - .timeout = 200, -}; - -/* ----------------------------------------------------------------------- */ -/* I2C functions - hardware i2c */ - -static u32 functionality(struct i2c_adapter *adap) -{ - return I2C_FUNC_SMBUS_EMUL; -} - -static int -bttv_i2c_wait_done(struct bttv *btv) -{ - int rc = 0; - - /* timeout */ - if (wait_event_interruptible_timeout(btv->i2c_queue, - btv->i2c_done, msecs_to_jiffies(85)) == -ERESTARTSYS) - rc = -EIO; - - if (btv->i2c_done & BT848_INT_RACK) - rc = 1; - btv->i2c_done = 0; - return rc; -} - -#define I2C_HW (BT878_I2C_MODE | BT848_I2C_SYNC |\ - BT848_I2C_SCL | BT848_I2C_SDA) - -static int -bttv_i2c_sendbytes(struct bttv *btv, const struct i2c_msg *msg, int last) -{ - u32 xmit; - int retval,cnt; - - /* sanity checks */ - if (0 == msg->len) - return -EINVAL; - - /* start, address + first byte */ - xmit = (msg->addr << 25) | (msg->buf[0] << 16) | I2C_HW; - if (msg->len > 1 || !last) - xmit |= BT878_I2C_NOSTOP; - btwrite(xmit, BT848_I2C); - retval = bttv_i2c_wait_done(btv); - if (retval < 0) - goto err; - if (retval == 0) - goto eio; - if (i2c_debug) { - pr_cont(" <W %02x %02x", msg->addr << 1, msg->buf[0]); - } - - for (cnt = 1; cnt < msg->len; cnt++ ) { - /* following bytes */ - xmit = (msg->buf[cnt] << 24) | I2C_HW | BT878_I2C_NOSTART; - if (cnt < msg->len-1 || !last) - xmit |= BT878_I2C_NOSTOP; - btwrite(xmit, BT848_I2C); - retval = bttv_i2c_wait_done(btv); - if (retval < 0) - goto err; - if (retval == 0) - goto eio; - if (i2c_debug) - pr_cont(" %02x", msg->buf[cnt]); - } - if (!(xmit & BT878_I2C_NOSTOP)) - pr_cont(">\n"); - return msg->len; - - eio: - retval = -EIO; - err: - if (i2c_debug) - pr_cont(" ERR: %d\n",retval); - return retval; -} - -static int -bttv_i2c_readbytes(struct bttv *btv, const struct i2c_msg *msg, int last) -{ - u32 xmit; - u32 cnt; - int retval; - - for (cnt = 0; cnt < msg->len; cnt++) { - xmit = (msg->addr << 25) | (1 << 24) | I2C_HW; - if (cnt < msg->len-1) - xmit |= BT848_I2C_W3B; - if (cnt < msg->len-1 || !last) - xmit |= BT878_I2C_NOSTOP; - if (cnt) - xmit |= BT878_I2C_NOSTART; - - if (i2c_debug) { - if (!(xmit & BT878_I2C_NOSTART)) - pr_cont(" <R %02x", (msg->addr << 1) +1); - } - - btwrite(xmit, BT848_I2C); - retval = bttv_i2c_wait_done(btv); - if (retval < 0) - goto err; - if (retval == 0) - goto eio; - msg->buf[cnt] = ((u32)btread(BT848_I2C) >> 8) & 0xff; - if (i2c_debug) { - pr_cont(" =%02x", msg->buf[cnt]); - } - if (i2c_debug && !(xmit & BT878_I2C_NOSTOP)) - pr_cont(" >\n"); - } - - - return msg->len; - - eio: - retval = -EIO; - err: - if (i2c_debug) - pr_cont(" ERR: %d\n",retval); - return retval; -} - -static int bttv_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num) -{ - struct v4l2_device *v4l2_dev = i2c_get_adapdata(i2c_adap); - struct bttv *btv = to_bttv(v4l2_dev); - int retval = 0; - int i; - - if (i2c_debug) - pr_debug("bt-i2c:"); - - btwrite(BT848_INT_I2CDONE|BT848_INT_RACK, BT848_INT_STAT); - for (i = 0 ; i < num; i++) { - if (msgs[i].flags & I2C_M_RD) { - /* read */ - retval = bttv_i2c_readbytes(btv, &msgs[i], i+1 == num); - if (retval < 0) - goto err; - } else { - /* write */ - retval = bttv_i2c_sendbytes(btv, &msgs[i], i+1 == num); - if (retval < 0) - goto err; - } - } - return num; - - err: - return retval; -} - -static const struct i2c_algorithm bttv_algo = { - .master_xfer = bttv_i2c_xfer, - .functionality = functionality, -}; - -/* ----------------------------------------------------------------------- */ -/* I2C functions - common stuff */ - -/* 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) - pr_info("%d: i2c: checking for %s @ 0x%02x... ", - btv->c.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) - pr_cont("not found\n"); - } else - pr_warn("%d: i2c read 0x%x: error\n", - btv->c.nr, addr); - return -1; - } - if (bttv_verbose && NULL != probe_for) - pr_cont("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) -{ - memset(eedata, 0, 256); - if (0 != btv->i2c_rc) - return; - btv->i2c_client.addr = addr >> 1; - tveeprom_read(&btv->i2c_client, eedata, 256); -} - -static char *i2c_devs[128] = { - [ 0x1c >> 1 ] = "lgdt330x", - [ 0x30 >> 1 ] = "IR (hauppauge)", - [ 0x80 >> 1 ] = "msp34xx", - [ 0x86 >> 1 ] = "tda9887", - [ 0xa0 >> 1 ] = "eeprom", - [ 0xc0 >> 1 ] = "tuner (analog)", - [ 0xc2 >> 1 ] = "tuner (analog)", -}; - -static void do_i2c_scan(char *name, struct i2c_client *c) -{ - unsigned char buf; - int i,rc; - - for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) { - c->addr = i; - rc = i2c_master_recv(c,&buf,0); - if (rc < 0) - continue; - pr_info("%s: i2c scan: found device @ 0x%x [%s]\n", - name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???"); - } -} - -/* init + register i2c adapter */ -int __devinit init_bttv_i2c(struct bttv *btv) -{ - strlcpy(btv->i2c_client.name, "bttv internal", I2C_NAME_SIZE); - - if (i2c_hw) - btv->use_i2c_hw = 1; - if (btv->use_i2c_hw) { - /* bt878 */ - strlcpy(btv->c.i2c_adap.name, "bt878", - sizeof(btv->c.i2c_adap.name)); - btv->c.i2c_adap.algo = &bttv_algo; - } else { - /* bt848 */ - /* Prevents usage of invalid delay values */ - if (i2c_udelay<5) - i2c_udelay=5; - - strlcpy(btv->c.i2c_adap.name, "bttv", - sizeof(btv->c.i2c_adap.name)); - memcpy(&btv->i2c_algo, &bttv_i2c_algo_bit_template, - sizeof(bttv_i2c_algo_bit_template)); - btv->i2c_algo.udelay = i2c_udelay; - btv->i2c_algo.data = btv; - btv->c.i2c_adap.algo_data = &btv->i2c_algo; - } - btv->c.i2c_adap.owner = THIS_MODULE; - - btv->c.i2c_adap.dev.parent = &btv->c.pci->dev; - snprintf(btv->c.i2c_adap.name, sizeof(btv->c.i2c_adap.name), - "bt%d #%d [%s]", btv->id, btv->c.nr, - btv->use_i2c_hw ? "hw" : "sw"); - - i2c_set_adapdata(&btv->c.i2c_adap, &btv->c.v4l2_dev); - btv->i2c_client.adapter = &btv->c.i2c_adap; - - - if (btv->use_i2c_hw) { - btv->i2c_rc = i2c_add_adapter(&btv->c.i2c_adap); - } else { - bttv_bit_setscl(btv,1); - bttv_bit_setsda(btv,1); - btv->i2c_rc = i2c_bit_add_bus(&btv->c.i2c_adap); - } - if (0 == btv->i2c_rc && i2c_scan) - do_i2c_scan(btv->c.v4l2_dev.name, &btv->i2c_client); - - return btv->i2c_rc; -} |