drivers/media/pci/mantis/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
  27 static 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 }
  48 int 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 }
  64 EXPORT_SYMBOL_GPL(mantis_get_mac);
  65
  66 /* Turn the given bit on or off. */
  67 void 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 }
  82 EXPORT_SYMBOL_GPL(mantis_gpio_set_bits);
  83
  84 int 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 }
 112 EXPORT_SYMBOL_GPL(mantis_stream_control);