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