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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/drivers/media/video/cx25821/cx25821-i2c.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/drivers/media/video/cx25821/cx25821-i2c.c')
-rw-r--r-- | ANDROID_3.4.5/drivers/media/video/cx25821/cx25821-i2c.c | 423 |
1 files changed, 0 insertions, 423 deletions
diff --git a/ANDROID_3.4.5/drivers/media/video/cx25821/cx25821-i2c.c b/ANDROID_3.4.5/drivers/media/video/cx25821/cx25821-i2c.c deleted file mode 100644 index 12d7300f..00000000 --- a/ANDROID_3.4.5/drivers/media/video/cx25821/cx25821-i2c.c +++ /dev/null @@ -1,423 +0,0 @@ -/* - * Driver for the Conexant CX25821 PCIe bridge - * - * Copyright (C) 2009 Conexant Systems Inc. - * Authors <shu.lin@conexant.com>, <hiep.huynh@conexant.com> - * Based on Steven Toth <stoth@linuxtv.org> cx23885 driver - * - * 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 "cx25821.h" -#include <linux/i2c.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 cx25821_i2c *bus = i2c_adap->algo_data; - struct cx25821_dev *dev = bus->dev; - return cx_read(bus->reg_stat) & 0x01; -} - -static inline int i2c_is_busy(struct i2c_adapter *i2c_adap) -{ - struct cx25821_i2c *bus = i2c_adap->algo_data; - struct cx25821_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 cx25821_i2c *bus = i2c_adap->algo_data; - struct cx25821_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) { - 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) - pr_err(" ERR: %d\n", retval); - return retval; -} - -static int i2c_readbytes(struct i2c_adapter *i2c_adap, - const struct i2c_msg *msg, int joined) -{ - struct cx25821_i2c *bus = i2c_adap->algo_data; - struct cx25821_dev *dev = bus->dev; - u32 ctrl, cnt; - int retval; - - if (i2c_debug && !joined) - dprintk(1, "6-%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) - pr_err(" ERR: %d\n", retval); - return retval; -} - -static int i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num) -{ - struct cx25821_i2c *bus = i2c_adap->algo_data; - struct cx25821_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 u32 cx25821_functionality(struct i2c_adapter *adap) -{ - return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C | I2C_FUNC_SMBUS_WORD_DATA | - I2C_FUNC_SMBUS_READ_WORD_DATA | I2C_FUNC_SMBUS_WRITE_WORD_DATA; -} - -static struct i2c_algorithm cx25821_i2c_algo_template = { - .master_xfer = i2c_xfer, - .functionality = cx25821_functionality, -#ifdef NEED_ALGO_CONTROL - .algo_control = dummy_algo_control, -#endif -}; - -static struct i2c_adapter cx25821_i2c_adap_template = { - .name = "cx25821", - .owner = THIS_MODULE, - .algo = &cx25821_i2c_algo_template, -}; - -static struct i2c_client cx25821_i2c_client_template = { - .name = "cx25821 internal", -}; - -/* init + register i2c adapter */ -int cx25821_i2c_register(struct cx25821_i2c *bus) -{ - struct cx25821_dev *dev = bus->dev; - - dprintk(1, "%s(bus = %d)\n", __func__, bus->nr); - - memcpy(&bus->i2c_adap, &cx25821_i2c_adap_template, - sizeof(bus->i2c_adap)); - memcpy(&bus->i2c_algo, &cx25821_i2c_algo_template, - sizeof(bus->i2c_algo)); - memcpy(&bus->i2c_client, &cx25821_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, &dev->v4l2_dev); - i2c_add_adapter(&bus->i2c_adap); - - bus->i2c_client.adapter = &bus->i2c_adap; - - /* set up the I2c */ - bus->i2c_client.addr = (0x88 >> 1); - - return bus->i2c_rc; -} - -int cx25821_i2c_unregister(struct cx25821_i2c *bus) -{ - i2c_del_adapter(&bus->i2c_adap); - return 0; -} - -void cx25821_av_clk(struct cx25821_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[0].i2c_adap, &msg, 1); -} - -int cx25821_i2c_read(struct cx25821_i2c *bus, u16 reg_addr, int *value) -{ - struct i2c_client *client = &bus->i2c_client; - int retval = 0; - int v = 0; - u8 addr[2] = { 0, 0 }; - u8 buf[4] = { 0, 0, 0, 0 }; - - struct i2c_msg msgs[2] = { - { - .addr = client->addr, - .flags = 0, - .len = 2, - .buf = addr, - }, { - .addr = client->addr, - .flags = I2C_M_RD, - .len = 4, - .buf = buf, - } - }; - - addr[0] = (reg_addr >> 8); - addr[1] = (reg_addr & 0xff); - msgs[0].addr = 0x44; - msgs[1].addr = 0x44; - - retval = i2c_xfer(client->adapter, msgs, 2); - - v = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; - *value = v; - - return v; -} - -int cx25821_i2c_write(struct cx25821_i2c *bus, u16 reg_addr, int value) -{ - struct i2c_client *client = &bus->i2c_client; - int retval = 0; - u8 buf[6] = { 0, 0, 0, 0, 0, 0 }; - - struct i2c_msg msgs[1] = { - { - .addr = client->addr, - .flags = 0, - .len = 6, - .buf = buf, - } - }; - - buf[0] = reg_addr >> 8; - buf[1] = reg_addr & 0xff; - buf[5] = (value >> 24) & 0xff; - buf[4] = (value >> 16) & 0xff; - buf[3] = (value >> 8) & 0xff; - buf[2] = value & 0xff; - client->flags = 0; - msgs[0].addr = 0x44; - - retval = i2c_xfer(client->adapter, msgs, 1); - - return retval; -} |