LXR linux/drivers/media/pci/mantis/mantis

   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);
 113