diff options
Diffstat (limited to 'drivers/media/video/cx23885/cx23885-i2c.c')
| -rw-r--r-- | drivers/media/video/cx23885/cx23885-i2c.c | 456 |
1 files changed, 0 insertions, 456 deletions
diff --git a/drivers/media/video/cx23885/cx23885-i2c.c b/drivers/media/video/cx23885/cx23885-i2c.c deleted file mode 100644 index bb7f71a1fcb..00000000000 --- a/drivers/media/video/cx23885/cx23885-i2c.c +++ /dev/null @@ -1,456 +0,0 @@ -/* - * Driver for the Conexant CX23885 PCIe bridge - * - * Copyright (c) 2006 Steven Toth <stoth@linuxtv.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/moduleparam.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <asm/io.h> - -#include "cx23885.h" - -#include <media/v4l2-common.h> - -static unsigned int i2c_debug; -module_param(i2c_debug, int, 0644); -MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]"); - -static unsigned int i2c_scan; -module_param(i2c_scan, int, 0444); -MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time"); - -#define dprintk(level, fmt, arg...)\ - do { if (i2c_debug >= level)\ - printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\ - } while (0) - -#define I2C_WAIT_DELAY 32 -#define I2C_WAIT_RETRY 64 - -#define I2C_EXTEND (1 << 3) -#define I2C_NOSTOP (1 << 4) - -static inline int i2c_slave_did_ack(struct i2c_adapter *i2c_adap) -{ - struct cx23885_i2c *bus = i2c_adap->algo_data; - struct cx23885_dev *dev = bus->dev; - return cx_read(bus->reg_stat) & 0x01; -} - -static inline int i2c_is_busy(struct i2c_adapter *i2c_adap) -{ - struct cx23885_i2c *bus = i2c_adap->algo_data; - struct cx23885_dev *dev = bus->dev; - return cx_read(bus->reg_stat) & 0x02 ? 1 : 0; -} - -static int i2c_wait_done(struct i2c_adapter *i2c_adap) -{ - int count; - - for (count = 0; count < I2C_WAIT_RETRY; count++) { - if (!i2c_is_busy(i2c_adap)) - break; - udelay(I2C_WAIT_DELAY); - } - - if (I2C_WAIT_RETRY == count) - return 0; - - return 1; -} - -static int i2c_sendbytes(struct i2c_adapter *i2c_adap, - const struct i2c_msg *msg, int joined_rlen) -{ - struct cx23885_i2c *bus = i2c_adap->algo_data; - struct cx23885_dev *dev = bus->dev; - u32 wdata, addr, ctrl; - int retval, cnt; - - if (joined_rlen) - dprintk(1, "%s(msg->wlen=%d, nextmsg->rlen=%d)\n", __func__, - msg->len, joined_rlen); - else - dprintk(1, "%s(msg->len=%d)\n", __func__, msg->len); - - /* Deal with i2c probe functions with zero payload */ - if (msg->len == 0) { - cx_write(bus->reg_addr, msg->addr << 25); - cx_write(bus->reg_ctrl, bus->i2c_period | (1 << 2)); - if (!i2c_wait_done(i2c_adap)) - return -EIO; - if (!i2c_slave_did_ack(i2c_adap)) - return -EIO; - - dprintk(1, "%s() returns 0\n", __func__); - return 0; - } - - - /* dev, reg + first byte */ - addr = (msg->addr << 25) | msg->buf[0]; - wdata = msg->buf[0]; - ctrl = bus->i2c_period | (1 << 12) | (1 << 2); - - if (msg->len > 1) - ctrl |= I2C_NOSTOP | I2C_EXTEND; - else if (joined_rlen) - ctrl |= I2C_NOSTOP; - - cx_write(bus->reg_addr, addr); - cx_write(bus->reg_wdata, wdata); - cx_write(bus->reg_ctrl, ctrl); - - retval = i2c_wait_done(i2c_adap); - if (retval < 0) - goto err; - if (retval == 0) - goto eio; - if (i2c_debug) { - printk(" <W %02x %02x", msg->addr << 1, msg->buf[0]); - if (!(ctrl & I2C_NOSTOP)) - printk(" >\n"); - } - - for (cnt = 1; cnt < msg->len; cnt++) { - /* following bytes */ - wdata = msg->buf[cnt]; - ctrl = bus->i2c_period | (1 << 12) | (1 << 2); - - if (cnt < msg->len - 1) - ctrl |= I2C_NOSTOP | I2C_EXTEND; - else if (joined_rlen) - ctrl |= I2C_NOSTOP; - - cx_write(bus->reg_addr, addr); - cx_write(bus->reg_wdata, wdata); - cx_write(bus->reg_ctrl, ctrl); - - retval = i2c_wait_done(i2c_adap); - if (retval < 0) - goto err; - if (retval == 0) - goto eio; - if (i2c_debug) { - dprintk(1, " %02x", msg->buf[cnt]); - if (!(ctrl & I2C_NOSTOP)) - dprintk(1, " >\n"); - } - } - return msg->len; - - eio: - retval = -EIO; - err: - if (i2c_debug) - printk(KERN_ERR " ERR: %d\n", retval); - return retval; -} - -static int i2c_readbytes(struct i2c_adapter *i2c_adap, - const struct i2c_msg *msg, int joined) -{ - struct cx23885_i2c *bus = i2c_adap->algo_data; - struct cx23885_dev *dev = bus->dev; - u32 ctrl, cnt; - int retval; - - - if (i2c_debug && !joined) - dprintk(1, "%s(msg->len=%d)\n", __func__, msg->len); - - /* Deal with i2c probe functions with zero payload */ - if (msg->len == 0) { - cx_write(bus->reg_addr, msg->addr << 25); - cx_write(bus->reg_ctrl, bus->i2c_period | (1 << 2) | 1); - if (!i2c_wait_done(i2c_adap)) - return -EIO; - if (!i2c_slave_did_ack(i2c_adap)) - return -EIO; - - - dprintk(1, "%s() returns 0\n", __func__); - return 0; - } - - if (i2c_debug) { - if (joined) - dprintk(1, " R"); - else - dprintk(1, " <R %02x", (msg->addr << 1) + 1); - } - - for (cnt = 0; cnt < msg->len; cnt++) { - - ctrl = bus->i2c_period | (1 << 12) | (1 << 2) | 1; - - if (cnt < msg->len - 1) - ctrl |= I2C_NOSTOP | I2C_EXTEND; - - cx_write(bus->reg_addr, msg->addr << 25); - cx_write(bus->reg_ctrl, ctrl); - - retval = i2c_wait_done(i2c_adap); - if (retval < 0) - goto err; - if (retval == 0) - goto eio; - msg->buf[cnt] = cx_read(bus->reg_rdata) & 0xff; - if (i2c_debug) { - dprintk(1, " %02x", msg->buf[cnt]); - if (!(ctrl & I2C_NOSTOP)) - dprintk(1, " >\n"); - } - } - return msg->len; - - eio: - retval = -EIO; - err: - if (i2c_debug) - printk(KERN_ERR " ERR: %d\n", retval); - return retval; -} - -static int i2c_xfer(struct i2c_adapter *i2c_adap, - struct i2c_msg *msgs, int num) -{ - struct cx23885_i2c *bus = i2c_adap->algo_data; - struct cx23885_dev *dev = bus->dev; - int i, retval = 0; - - dprintk(1, "%s(num = %d)\n", __func__, num); - - for (i = 0 ; i < num; i++) { - dprintk(1, "%s(num = %d) addr = 0x%02x len = 0x%x\n", - __func__, num, msgs[i].addr, msgs[i].len); - if (msgs[i].flags & I2C_M_RD) { - /* read */ - retval = i2c_readbytes(i2c_adap, &msgs[i], 0); - } else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) && - msgs[i].addr == msgs[i + 1].addr) { - /* write then read from same address */ - retval = i2c_sendbytes(i2c_adap, &msgs[i], - msgs[i + 1].len); - if (retval < 0) - goto err; - i++; - retval = i2c_readbytes(i2c_adap, &msgs[i], 1); - } else { - /* write */ - retval = i2c_sendbytes(i2c_adap, &msgs[i], 0); - } - if (retval < 0) - goto err; - } - return num; - - err: - return retval; -} - -static int attach_inform(struct i2c_client *client) -{ - struct cx23885_i2c *bus = i2c_get_adapdata(client->adapter); - struct cx23885_dev *dev = bus->dev; - struct tuner_setup tun_setup; - - dprintk(1, "%s i2c attach [addr=0x%x,client=%s]\n", - client->driver->driver.name, client->addr, client->name); - - if (!client->driver->command) - return 0; - - if (dev->tuner_type != UNSET) { - - dprintk(1, "%s (tuner) i2c attach [addr=0x%x,client=%s]\n", - client->driver->driver.name, client->addr, - client->name); - - if ((dev->tuner_addr == ADDR_UNSET) || - (dev->tuner_addr == client->addr)) { - - dprintk(1, "%s (tuner || addr UNSET)\n", - client->driver->driver.name); - - dprintk(1, "%s i2c attach [addr=0x%x,client=%s]\n", - client->driver->driver.name, - client->addr, client->name); - - tun_setup.mode_mask = T_ANALOG_TV; - tun_setup.type = dev->tuner_type; - tun_setup.addr = dev->tuner_addr; - - client->driver->command(client, TUNER_SET_TYPE_ADDR, - &tun_setup); - } - } - - return 0; -} - -static int detach_inform(struct i2c_client *client) -{ - struct cx23885_dev *dev = i2c_get_adapdata(client->adapter); - - dprintk(1, "i2c detach [client=%s]\n", client->name); - - return 0; -} - -void cx23885_call_i2c_clients(struct cx23885_i2c *bus, - unsigned int cmd, void *arg) -{ - if (bus->i2c_rc != 0) - return; - - i2c_clients_command(&bus->i2c_adap, cmd, arg); -} - -static u32 cx23885_functionality(struct i2c_adapter *adap) -{ - return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C; -} - -static struct i2c_algorithm cx23885_i2c_algo_template = { - .master_xfer = i2c_xfer, - .functionality = cx23885_functionality, -}; - -/* ----------------------------------------------------------------------- */ - -static struct i2c_adapter cx23885_i2c_adap_template = { - .name = "cx23885", - .owner = THIS_MODULE, - .id = I2C_HW_B_CX23885, - .algo = &cx23885_i2c_algo_template, - .class = I2C_CLASS_TV_ANALOG, - .client_register = attach_inform, - .client_unregister = detach_inform, -}; - -static struct i2c_client cx23885_i2c_client_template = { - .name = "cx23885 internal", -}; - -static char *i2c_devs[128] = { - [0x10 >> 1] = "tda10048", - [0x12 >> 1] = "dib7000pc", - [0x1c >> 1] = "lgdt3303", - [0x86 >> 1] = "tda9887", - [0x32 >> 1] = "cx24227", - [0x88 >> 1] = "cx25837", - [0x84 >> 1] = "tda8295", - [0xa0 >> 1] = "eeprom", - [0xc0 >> 1] = "tuner/mt2131/tda8275", - [0xc2 >> 1] = "tuner/mt2131/tda8275/xc5000/xc3028", - [0xc8 >> 1] = "tuner/xc3028L", -}; - -static void do_i2c_scan(char *name, struct i2c_client *c) -{ - unsigned char buf; - int i, rc; - - for (i = 0; i < 128; i++) { - c->addr = i; - rc = i2c_master_recv(c, &buf, 0); - if (rc < 0) - continue; - printk(KERN_INFO "%s: i2c scan: found device @ 0x%x [%s]\n", - name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???"); - } -} - -/* init + register i2c algo-bit adapter */ -int cx23885_i2c_register(struct cx23885_i2c *bus) -{ - struct cx23885_dev *dev = bus->dev; - - dprintk(1, "%s(bus = %d)\n", __func__, bus->nr); - - memcpy(&bus->i2c_adap, &cx23885_i2c_adap_template, - sizeof(bus->i2c_adap)); - memcpy(&bus->i2c_algo, &cx23885_i2c_algo_template, - sizeof(bus->i2c_algo)); - memcpy(&bus->i2c_client, &cx23885_i2c_client_template, - sizeof(bus->i2c_client)); - - bus->i2c_adap.dev.parent = &dev->pci->dev; - - strlcpy(bus->i2c_adap.name, bus->dev->name, - sizeof(bus->i2c_adap.name)); - - bus->i2c_algo.data = bus; - bus->i2c_adap.algo_data = bus; - i2c_set_adapdata(&bus->i2c_adap, bus); - i2c_add_adapter(&bus->i2c_adap); - - bus->i2c_client.adapter = &bus->i2c_adap; - - if (0 == bus->i2c_rc) { - dprintk(1, "%s: i2c bus %d registered\n", dev->name, bus->nr); - if (i2c_scan) - do_i2c_scan(dev->name, &bus->i2c_client); - } else - printk(KERN_WARNING "%s: i2c bus %d register FAILED\n", - dev->name, bus->nr); - - return bus->i2c_rc; -} - -int cx23885_i2c_unregister(struct cx23885_i2c *bus) -{ - i2c_del_adapter(&bus->i2c_adap); - return 0; -} - -void cx23885_av_clk(struct cx23885_dev *dev, int enable) -{ - /* write 0 to bus 2 addr 0x144 via i2x_xfer() */ - char buffer[3]; - struct i2c_msg msg; - dprintk(1, "%s(enabled = %d)\n", __func__, enable); - - /* Register 0x144 */ - buffer[0] = 0x01; - buffer[1] = 0x44; - if (enable == 1) - buffer[2] = 0x05; - else - buffer[2] = 0x00; - - msg.addr = 0x44; - msg.flags = I2C_M_TEN; - msg.len = 3; - msg.buf = buffer; - - i2c_xfer(&dev->i2c_bus[2].i2c_adap, &msg, 1); -} - -/* ----------------------------------------------------------------------- */ - -/* - * Local variables: - * c-basic-offset: 8 - * End: - */ |
