From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/drivers/media/pci/cx23885/cx23885-i2c.c | 384 +++++++++++++++++++++++++ 1 file changed, 384 insertions(+) create mode 100644 kernel/drivers/media/pci/cx23885/cx23885-i2c.c (limited to 'kernel/drivers/media/pci/cx23885/cx23885-i2c.c') diff --git a/kernel/drivers/media/pci/cx23885/cx23885-i2c.c b/kernel/drivers/media/pci/cx23885/cx23885-i2c.c new file mode 100644 index 000000000..1135ea3f6 --- /dev/null +++ b/kernel/drivers/media/pci/cx23885/cx23885-i2c.c @@ -0,0 +1,384 @@ +/* + * Driver for the Conexant CX23885 PCIe bridge + * + * Copyright (c) 2006 Steven Toth + * + * 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. + */ + +#include +#include +#include +#include +#include + +#include "cx23885.h" + +#include + +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 -ENXIO; + + 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); + + if (!i2c_wait_done(i2c_adap)) + goto eio; + if (i2c_debug) { + printk(" 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); + + if (!i2c_wait_done(i2c_adap)) + goto eio; + if (i2c_debug) { + dprintk(1, " %02x", msg->buf[cnt]); + if (!(ctrl & I2C_NOSTOP)) + dprintk(1, " >\n"); + } + } + return msg->len; + + eio: + retval = -EIO; + 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 -ENXIO; + + + dprintk(1, "%s() returns 0\n", __func__); + return 0; + } + + if (i2c_debug) { + if (joined) + dprintk(1, " R"); + else + dprintk(1, " 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); + + if (!i2c_wait_done(i2c_adap)) + 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; + 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 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, + .algo = &cx23885_i2c_algo_template, +}; + +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", + [0x98 >> 1] = "flatiron", + [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%04x [%s]\n", + name, i, i2c_devs[i] ? i2c_devs[i] : "???"); + } +} + +/* init + register i2c adapter */ +int cx23885_i2c_register(struct cx23885_i2c *bus) +{ + struct cx23885_dev *dev = bus->dev; + + dprintk(1, "%s(bus = %d)\n", __func__, bus->nr); + + bus->i2c_adap = cx23885_i2c_adap_template; + bus->i2c_client = cx23885_i2c_client_template; + bus->i2c_adap.dev.parent = &dev->pci->dev; + + strlcpy(bus->i2c_adap.name, bus->dev->name, + sizeof(bus->i2c_adap.name)); + + 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; + + if (0 == bus->i2c_rc) { + dprintk(1, "%s: i2c bus %d registered\n", dev->name, bus->nr); + if (i2c_scan) { + printk(KERN_INFO "%s: scan bus %d:\n", + dev->name, bus->nr); + do_i2c_scan(dev->name, &bus->i2c_client); + } + } else + printk(KERN_WARNING "%s: i2c bus %d register FAILED\n", + dev->name, bus->nr); + + /* Instantiate the IR receiver device, if present */ + if (0 == bus->i2c_rc) { + struct i2c_board_info info; + const unsigned short addr_list[] = { + 0x6b, I2C_CLIENT_END + }; + + memset(&info, 0, sizeof(struct i2c_board_info)); + strlcpy(info.type, "ir_video", I2C_NAME_SIZE); + /* Use quick read command for probe, some IR chips don't + * support writes */ + i2c_new_probed_device(&bus->i2c_adap, &info, addr_list, + i2c_probe_func_quick_read); + } + + 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); +} -- cgit 1.2.3-korg