mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 00:05:35 +07:00
c668f32dca
Let card drivers probe for IR receiver devices and instantiate them if found. Ultimately it would be better if we could stop probing completely, but I suspect this won't be possible for all card types. There's certainly room for cleanups. For example, some drivers are sharing I2C adapter IDs, so they also had to share the list of I2C addresses being probed for an IR receiver. Now that each driver explicitly says which addresses should be probed, maybe some addresses can be dropped from some drivers. Also, the special cases in saa7134-i2c should probably be handled on a per-board basis. This would be more efficient and less risky than always probing extra addresses on all boards. I'll give it a try later. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
411 lines
9.7 KiB
C
411 lines
9.7 KiB
C
/*
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* Driver for the Conexant CX23885 PCIe bridge
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*
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* Copyright (c) 2006 Steven Toth <stoth@linuxtv.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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*
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <asm/io.h>
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#include "cx23885.h"
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#include <media/v4l2-common.h>
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static unsigned int i2c_debug;
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module_param(i2c_debug, int, 0644);
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MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
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static unsigned int i2c_scan;
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module_param(i2c_scan, int, 0444);
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MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
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#define dprintk(level, fmt, arg...)\
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do { if (i2c_debug >= level)\
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printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\
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} while (0)
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#define I2C_WAIT_DELAY 32
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#define I2C_WAIT_RETRY 64
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#define I2C_EXTEND (1 << 3)
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#define I2C_NOSTOP (1 << 4)
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static inline int i2c_slave_did_ack(struct i2c_adapter *i2c_adap)
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{
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struct cx23885_i2c *bus = i2c_adap->algo_data;
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struct cx23885_dev *dev = bus->dev;
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return cx_read(bus->reg_stat) & 0x01;
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}
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static inline int i2c_is_busy(struct i2c_adapter *i2c_adap)
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{
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struct cx23885_i2c *bus = i2c_adap->algo_data;
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struct cx23885_dev *dev = bus->dev;
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return cx_read(bus->reg_stat) & 0x02 ? 1 : 0;
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}
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static int i2c_wait_done(struct i2c_adapter *i2c_adap)
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{
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int count;
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for (count = 0; count < I2C_WAIT_RETRY; count++) {
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if (!i2c_is_busy(i2c_adap))
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break;
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udelay(I2C_WAIT_DELAY);
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}
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if (I2C_WAIT_RETRY == count)
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return 0;
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return 1;
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}
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static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
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const struct i2c_msg *msg, int joined_rlen)
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{
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struct cx23885_i2c *bus = i2c_adap->algo_data;
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struct cx23885_dev *dev = bus->dev;
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u32 wdata, addr, ctrl;
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int retval, cnt;
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if (joined_rlen)
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dprintk(1, "%s(msg->wlen=%d, nextmsg->rlen=%d)\n", __func__,
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msg->len, joined_rlen);
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else
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dprintk(1, "%s(msg->len=%d)\n", __func__, msg->len);
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/* Deal with i2c probe functions with zero payload */
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if (msg->len == 0) {
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cx_write(bus->reg_addr, msg->addr << 25);
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cx_write(bus->reg_ctrl, bus->i2c_period | (1 << 2));
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if (!i2c_wait_done(i2c_adap))
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return -EIO;
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if (!i2c_slave_did_ack(i2c_adap))
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return -EIO;
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dprintk(1, "%s() returns 0\n", __func__);
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return 0;
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}
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/* dev, reg + first byte */
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addr = (msg->addr << 25) | msg->buf[0];
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wdata = msg->buf[0];
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ctrl = bus->i2c_period | (1 << 12) | (1 << 2);
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if (msg->len > 1)
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ctrl |= I2C_NOSTOP | I2C_EXTEND;
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else if (joined_rlen)
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ctrl |= I2C_NOSTOP;
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cx_write(bus->reg_addr, addr);
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cx_write(bus->reg_wdata, wdata);
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cx_write(bus->reg_ctrl, ctrl);
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retval = i2c_wait_done(i2c_adap);
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if (retval < 0)
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goto err;
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if (retval == 0)
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goto eio;
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if (i2c_debug) {
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printk(" <W %02x %02x", msg->addr << 1, msg->buf[0]);
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if (!(ctrl & I2C_NOSTOP))
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printk(" >\n");
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}
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for (cnt = 1; cnt < msg->len; cnt++) {
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/* following bytes */
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wdata = msg->buf[cnt];
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ctrl = bus->i2c_period | (1 << 12) | (1 << 2);
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if (cnt < msg->len - 1)
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ctrl |= I2C_NOSTOP | I2C_EXTEND;
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else if (joined_rlen)
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ctrl |= I2C_NOSTOP;
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cx_write(bus->reg_addr, addr);
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cx_write(bus->reg_wdata, wdata);
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cx_write(bus->reg_ctrl, ctrl);
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retval = i2c_wait_done(i2c_adap);
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if (retval < 0)
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goto err;
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if (retval == 0)
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goto eio;
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if (i2c_debug) {
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dprintk(1, " %02x", msg->buf[cnt]);
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if (!(ctrl & I2C_NOSTOP))
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dprintk(1, " >\n");
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}
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}
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return msg->len;
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eio:
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retval = -EIO;
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err:
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if (i2c_debug)
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printk(KERN_ERR " ERR: %d\n", retval);
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return retval;
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}
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static int i2c_readbytes(struct i2c_adapter *i2c_adap,
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const struct i2c_msg *msg, int joined)
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{
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struct cx23885_i2c *bus = i2c_adap->algo_data;
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struct cx23885_dev *dev = bus->dev;
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u32 ctrl, cnt;
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int retval;
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if (i2c_debug && !joined)
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dprintk(1, "%s(msg->len=%d)\n", __func__, msg->len);
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/* Deal with i2c probe functions with zero payload */
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if (msg->len == 0) {
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cx_write(bus->reg_addr, msg->addr << 25);
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cx_write(bus->reg_ctrl, bus->i2c_period | (1 << 2) | 1);
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if (!i2c_wait_done(i2c_adap))
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return -EIO;
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if (!i2c_slave_did_ack(i2c_adap))
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return -EIO;
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dprintk(1, "%s() returns 0\n", __func__);
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return 0;
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}
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if (i2c_debug) {
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if (joined)
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dprintk(1, " R");
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else
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dprintk(1, " <R %02x", (msg->addr << 1) + 1);
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}
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for (cnt = 0; cnt < msg->len; cnt++) {
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ctrl = bus->i2c_period | (1 << 12) | (1 << 2) | 1;
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if (cnt < msg->len - 1)
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ctrl |= I2C_NOSTOP | I2C_EXTEND;
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cx_write(bus->reg_addr, msg->addr << 25);
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cx_write(bus->reg_ctrl, ctrl);
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retval = i2c_wait_done(i2c_adap);
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if (retval < 0)
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goto err;
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if (retval == 0)
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goto eio;
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msg->buf[cnt] = cx_read(bus->reg_rdata) & 0xff;
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if (i2c_debug) {
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dprintk(1, " %02x", msg->buf[cnt]);
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if (!(ctrl & I2C_NOSTOP))
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dprintk(1, " >\n");
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}
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}
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return msg->len;
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eio:
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retval = -EIO;
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err:
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if (i2c_debug)
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printk(KERN_ERR " ERR: %d\n", retval);
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return retval;
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}
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static int i2c_xfer(struct i2c_adapter *i2c_adap,
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struct i2c_msg *msgs, int num)
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{
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struct cx23885_i2c *bus = i2c_adap->algo_data;
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struct cx23885_dev *dev = bus->dev;
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int i, retval = 0;
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dprintk(1, "%s(num = %d)\n", __func__, num);
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for (i = 0 ; i < num; i++) {
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dprintk(1, "%s(num = %d) addr = 0x%02x len = 0x%x\n",
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__func__, num, msgs[i].addr, msgs[i].len);
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if (msgs[i].flags & I2C_M_RD) {
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/* read */
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retval = i2c_readbytes(i2c_adap, &msgs[i], 0);
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} else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) &&
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msgs[i].addr == msgs[i + 1].addr) {
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/* write then read from same address */
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retval = i2c_sendbytes(i2c_adap, &msgs[i],
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msgs[i + 1].len);
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if (retval < 0)
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goto err;
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i++;
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retval = i2c_readbytes(i2c_adap, &msgs[i], 1);
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} else {
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/* write */
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retval = i2c_sendbytes(i2c_adap, &msgs[i], 0);
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}
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if (retval < 0)
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goto err;
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}
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return num;
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err:
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return retval;
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}
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static u32 cx23885_functionality(struct i2c_adapter *adap)
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{
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return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C;
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}
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static struct i2c_algorithm cx23885_i2c_algo_template = {
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.master_xfer = i2c_xfer,
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.functionality = cx23885_functionality,
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};
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/* ----------------------------------------------------------------------- */
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static struct i2c_adapter cx23885_i2c_adap_template = {
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.name = "cx23885",
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.owner = THIS_MODULE,
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.id = I2C_HW_B_CX23885,
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.algo = &cx23885_i2c_algo_template,
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};
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static struct i2c_client cx23885_i2c_client_template = {
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.name = "cx23885 internal",
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};
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static char *i2c_devs[128] = {
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[0x10 >> 1] = "tda10048",
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[0x12 >> 1] = "dib7000pc",
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[0x1c >> 1] = "lgdt3303",
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[0x86 >> 1] = "tda9887",
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[0x32 >> 1] = "cx24227",
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[0x88 >> 1] = "cx25837",
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[0x84 >> 1] = "tda8295",
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[0xa0 >> 1] = "eeprom",
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[0xc0 >> 1] = "tuner/mt2131/tda8275",
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[0xc2 >> 1] = "tuner/mt2131/tda8275/xc5000/xc3028",
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[0xc8 >> 1] = "tuner/xc3028L",
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};
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static void do_i2c_scan(char *name, struct i2c_client *c)
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{
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unsigned char buf;
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int i, rc;
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for (i = 0; i < 128; i++) {
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c->addr = i;
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rc = i2c_master_recv(c, &buf, 0);
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if (rc < 0)
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continue;
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printk(KERN_INFO "%s: i2c scan: found device @ 0x%x [%s]\n",
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name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
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}
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}
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/* init + register i2c algo-bit adapter */
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int cx23885_i2c_register(struct cx23885_i2c *bus)
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{
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struct cx23885_dev *dev = bus->dev;
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dprintk(1, "%s(bus = %d)\n", __func__, bus->nr);
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memcpy(&bus->i2c_adap, &cx23885_i2c_adap_template,
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sizeof(bus->i2c_adap));
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memcpy(&bus->i2c_algo, &cx23885_i2c_algo_template,
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sizeof(bus->i2c_algo));
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memcpy(&bus->i2c_client, &cx23885_i2c_client_template,
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sizeof(bus->i2c_client));
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bus->i2c_adap.dev.parent = &dev->pci->dev;
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strlcpy(bus->i2c_adap.name, bus->dev->name,
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sizeof(bus->i2c_adap.name));
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bus->i2c_algo.data = bus;
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bus->i2c_adap.algo_data = bus;
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i2c_set_adapdata(&bus->i2c_adap, &dev->v4l2_dev);
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i2c_add_adapter(&bus->i2c_adap);
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bus->i2c_client.adapter = &bus->i2c_adap;
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if (0 == bus->i2c_rc) {
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dprintk(1, "%s: i2c bus %d registered\n", dev->name, bus->nr);
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if (i2c_scan) {
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printk(KERN_INFO "%s: scan bus %d:\n",
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dev->name, bus->nr);
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do_i2c_scan(dev->name, &bus->i2c_client);
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}
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} else
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printk(KERN_WARNING "%s: i2c bus %d register FAILED\n",
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dev->name, bus->nr);
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/* Instantiate the IR receiver device, if present */
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if (0 == bus->i2c_rc) {
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struct i2c_board_info info;
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const unsigned short addr_list[] = {
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0x6b, I2C_CLIENT_END
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};
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memset(&info, 0, sizeof(struct i2c_board_info));
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strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
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i2c_new_probed_device(&bus->i2c_adap, &info, addr_list);
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}
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return bus->i2c_rc;
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}
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int cx23885_i2c_unregister(struct cx23885_i2c *bus)
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{
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i2c_del_adapter(&bus->i2c_adap);
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return 0;
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}
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void cx23885_av_clk(struct cx23885_dev *dev, int enable)
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{
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/* write 0 to bus 2 addr 0x144 via i2x_xfer() */
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char buffer[3];
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struct i2c_msg msg;
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dprintk(1, "%s(enabled = %d)\n", __func__, enable);
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/* Register 0x144 */
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buffer[0] = 0x01;
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buffer[1] = 0x44;
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if (enable == 1)
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buffer[2] = 0x05;
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else
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buffer[2] = 0x00;
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msg.addr = 0x44;
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msg.flags = I2C_M_TEN;
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msg.len = 3;
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msg.buf = buffer;
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i2c_xfer(&dev->i2c_bus[2].i2c_adap, &msg, 1);
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}
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/* ----------------------------------------------------------------------- */
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/*
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* Local variables:
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* c-basic-offset: 8
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* End:
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*/
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