89ee7f4f33
Based on 1 normalized pattern(s): 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 to obtain the license point your browser to http www gnu org copyleft gpl html extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 12 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Enrico Weigelt <info@metux.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081202.028166291@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
160 lines
3.8 KiB
C
160 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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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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/* 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/timer.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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#include "ngene.h"
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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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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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if (ngene_command(dev, &com) < 0)
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return -EIO;
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if ((com.cmd.raw8[0] >> 1) != adr)
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return -EIO;
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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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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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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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if (ngene_command(dev, &com) < 0)
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return -EIO;
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if (com.cmd.raw8[0] == 1)
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return -EIO;
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return 0;
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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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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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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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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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mutex_lock(&dev->i2c_switch_mutex);
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ngene_i2c_set_bus(dev, chan->number);
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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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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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mutex_unlock(&dev->i2c_switch_mutex);
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return -EIO;
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done:
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mutex_unlock(&dev->i2c_switch_mutex);
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return num;
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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_I2C | I2C_FUNC_SMBUS_EMUL;
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}
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static const 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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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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i2c_set_adapdata(adap, &(dev->channel[dev_nr]));
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strscpy(adap->name, "nGene", sizeof(adap->name));
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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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return i2c_add_adapter(adap);
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}
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