V4L/DVB: ngene: split out i2c code into a separate file

Split out the i2c related code from the ngene-core.c into a new file called
ngene-i2c.c.  This is part of a larger refactoring of the driver in preparation
for adding analog support.

Note that this patch makes *no* functional change - all I did was cut/paste the
code and add the function prototypes to ngene.h as needed.

Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 179 insertions, 0 deletions

diff --git a/drivers/media/dvb/ngene/ngene-i2c.c b/drivers/media/dvb/ngene/ngene-i2c.c
new file mode 100644
index 000000000000..2ef54ca6badd
--- /dev/null
+++ b/drivers/media/dvb/ngene/ngene-i2c.c
@@ -0,0 +1,179 @@
+/*
+ * ngene-i2c.c: nGene PCIe bridge driver i2c functions
+ *
+ * Copyright (C) 2005-2007 Micronas
+ *
+ * Copyright (C) 2008-2009 Ralph Metzler <rjkm@metzlerbros.de>
+ *                         Modifications for new nGene firmware,
+ *                         support for EEPROM-copying,
+ *                         support for new dual DVB-S2 card prototype
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 only, as published by the Free Software Foundation.
+ *
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA
+ * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
+ */
+
+/* FIXME - some of these can probably be removed */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/io.h>
+#include <asm/div64.h>
+#include <linux/pci.h>
+#include <linux/pci_ids.h>
+#include <linux/smp_lock.h>
+#include <linux/timer.h>
+#include <linux/version.h>
+#include <linux/byteorder/generic.h>
+#include <linux/firmware.h>
+#include <linux/vmalloc.h>
+
+#include "ngene.h"
+
+/* Firmware command for i2c operations */
+static int ngene_command_i2c_read(struct ngene *dev, u8 adr,
+                           u8 *out, u8 outlen, u8 *in, u8 inlen, int flag)
+{
+        struct ngene_command com;
+
+        com.cmd.hdr.Opcode = CMD_I2C_READ;
+        com.cmd.hdr.Length = outlen + 3;
+        com.cmd.I2CRead.Device = adr << 1;
+        memcpy(com.cmd.I2CRead.Data, out, outlen);
+        com.cmd.I2CRead.Data[outlen] = inlen;
+        com.cmd.I2CRead.Data[outlen + 1] = 0;
+        com.in_len = outlen + 3;
+        com.out_len = inlen + 1;
+
+        if (ngene_command(dev, &com) < 0)
+                return -EIO;
+
+        if ((com.cmd.raw8[0] >> 1) != adr)
+                return -EIO;
+
+        if (flag)
+                memcpy(in, com.cmd.raw8, inlen + 1);
+        else
+                memcpy(in, com.cmd.raw8 + 1, inlen);
+        return 0;
+}
+
+static int ngene_command_i2c_write(struct ngene *dev, u8 adr,
+                                   u8 *out, u8 outlen)
+{
+        struct ngene_command com;
+
+
+        com.cmd.hdr.Opcode = CMD_I2C_WRITE;
+        com.cmd.hdr.Length = outlen + 1;
+        com.cmd.I2CRead.Device = adr << 1;
+        memcpy(com.cmd.I2CRead.Data, out, outlen);
+        com.in_len = outlen + 1;
+        com.out_len = 1;
+
+        if (ngene_command(dev, &com) < 0)
+                return -EIO;
+
+        if (com.cmd.raw8[0] == 1)
+                return -EIO;
+
+        return 0;
+}
+
+static void ngene_i2c_set_bus(struct ngene *dev, int bus)
+{
+        if (!(dev->card_info->i2c_access & 2))
+                return;
+        if (dev->i2c_current_bus == bus)
+                return;
+
+        switch (bus) {
+        case 0:
+                ngene_command_gpio_set(dev, 3, 0);
+                ngene_command_gpio_set(dev, 2, 1);
+                break;
+
+        case 1:
+                ngene_command_gpio_set(dev, 2, 0);
+                ngene_command_gpio_set(dev, 3, 1);
+                break;
+        }
+        dev->i2c_current_bus = bus;
+}
+
+static int ngene_i2c_master_xfer(struct i2c_adapter *adapter,
+                                 struct i2c_msg msg[], int num)
+{
+        struct ngene_channel *chan =
+                (struct ngene_channel *)i2c_get_adapdata(adapter);
+        struct ngene *dev = chan->dev;
+
+        down(&dev->i2c_switch_mutex);
+        ngene_i2c_set_bus(dev, chan->number);
+
+        if (num == 2 && msg[1].flags & I2C_M_RD && !(msg[0].flags & I2C_M_RD))
+                if (!ngene_command_i2c_read(dev, msg[0].addr,
+                                            msg[0].buf, msg[0].len,
+                                            msg[1].buf, msg[1].len, 0))
+                        goto done;
+
+        if (num == 1 && !(msg[0].flags & I2C_M_RD))
+                if (!ngene_command_i2c_write(dev, msg[0].addr,
+                                             msg[0].buf, msg[0].len))
+                        goto done;
+        if (num == 1 && (msg[0].flags & I2C_M_RD))
+                if (!ngene_command_i2c_read(dev, msg[0].addr, NULL, 0,
+                                            msg[0].buf, msg[0].len, 0))
+                        goto done;
+
+        up(&dev->i2c_switch_mutex);
+        return -EIO;
+
+done:
+        up(&dev->i2c_switch_mutex);
+        return num;
+}
+
+
+static u32 ngene_i2c_functionality(struct i2c_adapter *adap)
+{
+        return I2C_FUNC_SMBUS_EMUL;
+}
+
+static struct i2c_algorithm ngene_i2c_algo = {
+        .master_xfer = ngene_i2c_master_xfer,
+        .functionality = ngene_i2c_functionality,
+};
+
+int ngene_i2c_init(struct ngene *dev, int dev_nr)
+{
+        struct i2c_adapter *adap = &(dev->channel[dev_nr].i2c_adapter);
+
+        i2c_set_adapdata(adap, &(dev->channel[dev_nr]));
+        adap->class = I2C_CLASS_TV_DIGITAL | I2C_CLASS_TV_ANALOG;
+
+        strcpy(adap->name, "nGene");
+
+        adap->algo = &ngene_i2c_algo;
+        adap->algo_data = (void *)&(dev->channel[dev_nr]);
+        adap->dev.parent = &dev->pci_dev->dev;
+
+        return i2c_add_adapter(adap);
+}
+