mantis_ioc.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3	Mantis PCI bridge driver
  4
  5	Copyright (C) Manu Abraham (abraham.manu@gmail.com)
  6
  7*/
  8
  9#include <linux/kernel.h>
 10#include <linux/i2c.h>
 11
 12#include <linux/signal.h>
 13#include <linux/sched.h>
 14#include <linux/interrupt.h>
 15#include <asm/io.h>
 16
 17#include <media/dmxdev.h>
 18#include <media/dvbdev.h>
 19#include <media/dvb_demux.h>
 20#include <media/dvb_frontend.h>
 21#include <media/dvb_net.h>
 22
 23#include "mantis_common.h"
 24#include "mantis_reg.h"
 25#include "mantis_ioc.h"
 26
 27static int read_eeprom_bytes(struct mantis_pci *mantis, u8 reg, u8 *data, u8 length)
 28{
 29	struct i2c_adapter *adapter = &mantis->adapter;
 30	int err;
 31	u8 buf = reg;
 32
 33	struct i2c_msg msg[] = {
 34		{ .addr = 0x50, .flags = 0, .buf = &buf, .len = 1 },
 35		{ .addr = 0x50, .flags = I2C_M_RD, .buf = data, .len = length },
 36	};
 37
 38	err = i2c_transfer(adapter, msg, 2);
 39	if (err < 0) {
 40		dprintk(MANTIS_ERROR, 1, "ERROR: i2c read: < err=%i d0=0x%02x d1=0x%02x >",
 41			err, data[0], data[1]);
 42
 43		return err;
 44	}
 45
 46	return 0;
 47}
 48int mantis_get_mac(struct mantis_pci *mantis)
 49{
 50	int err;
 51	u8 mac_addr[6] = {0};
 52
 53	err = read_eeprom_bytes(mantis, 0x08, mac_addr, 6);
 54	if (err < 0) {
 55		dprintk(MANTIS_ERROR, 1, "ERROR: Mantis EEPROM read error <%d>", err);
 56
 57		return err;
 58	}
 59
 60	dprintk(MANTIS_ERROR, 0, "    MAC Address=[%pM]\n", mac_addr);
 61
 62	return 0;
 63}
 64EXPORT_SYMBOL_GPL(mantis_get_mac);
 65
 66/* Turn the given bit on or off. */
 67void mantis_gpio_set_bits(struct mantis_pci *mantis, u32 bitpos, u8 value)
 68{
 69	u32 cur;
 70
 71	dprintk(MANTIS_DEBUG, 1, "Set Bit <%d> to <%d>", bitpos, value);
 72	cur = mmread(MANTIS_GPIF_ADDR);
 73	if (value)
 74		mantis->gpio_status = cur | (1 << bitpos);
 75	else
 76		mantis->gpio_status = cur & (~(1 << bitpos));
 77
 78	dprintk(MANTIS_DEBUG, 1, "GPIO Value <%02x>", mantis->gpio_status);
 79	mmwrite(mantis->gpio_status, MANTIS_GPIF_ADDR);
 80	mmwrite(0x00, MANTIS_GPIF_DOUT);
 81}
 82EXPORT_SYMBOL_GPL(mantis_gpio_set_bits);
 83
 84int mantis_stream_control(struct mantis_pci *mantis, enum mantis_stream_control stream_ctl)
 85{
 86	u32 reg;
 87
 88	reg = mmread(MANTIS_CONTROL);
 89	switch (stream_ctl) {
 90	case STREAM_TO_HIF:
 91		dprintk(MANTIS_DEBUG, 1, "Set stream to HIF");
 92		reg &= 0xff - MANTIS_BYPASS;
 93		mmwrite(reg, MANTIS_CONTROL);
 94		reg |= MANTIS_BYPASS;
 95		mmwrite(reg, MANTIS_CONTROL);
 96		break;
 97
 98	case STREAM_TO_CAM:
 99		dprintk(MANTIS_DEBUG, 1, "Set stream to CAM");
100		reg |= MANTIS_BYPASS;
101		mmwrite(reg, MANTIS_CONTROL);
102		reg &= 0xff - MANTIS_BYPASS;
103		mmwrite(reg, MANTIS_CONTROL);
104		break;
105	default:
106		dprintk(MANTIS_ERROR, 1, "Unknown MODE <%02x>", stream_ctl);
107		return -1;
108	}
109
110	return 0;
111}
112EXPORT_SYMBOL_GPL(mantis_stream_control);