drivers/media/dvb/mantis/mantis_hif.c

   1 /*
   2         Mantis PCI bridge driver
   3
   4         Copyright (C) 2005, 2006 Manu Abraham (abraham.manu@gmail.com)
   5
   6         This program is free software; you can redistribute it and/or modify
   7         it under the terms of the GNU General Public License as published by
   8         the Free Software Foundation; either version 2 of the License, or
   9         (at your option) any later version.
  10
  11         This program is distributed in the hope that it will be useful,
  12         but WITHOUT ANY WARRANTY; without even the implied warranty of
  13         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14         GNU General Public License for more details.
  15
  16         You should have received a copy of the GNU General Public License
  17         along with this program; if not, write to the Free Software
  18         Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "mantis_common.h"
  22 #include "mantis_hif.h"
  23 #include "mantis_link.h" /* temporary due to physical layer stuff */
  24
  25 static int mantis_hif_data_available(struct mantis_ca *ca)
  26 {
  27         struct mantis_pci *mantis = ca->ca_priv;
  28         int rc = 0;
  29
  30         if (wait_event_interruptible_timeout(ca->hif_data_wq,
  31                                              ca->sbuf_status & MANTIS_SBUF_DATA_AVAIL,
  32                                              msecs_to_jiffies(500)) == -ERESTARTSYS) {
  33
  34                 dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Read wait event timeout !", mantis->num);
  35                 rc = -EREMOTEIO;
  36         }
  37         ca->sbuf_status &= ~MANTIS_SBUF_DATA_AVAIL;
  38         udelay(2);
  39         return rc;
  40 }
  41
  42 static int mantis_hif_sbuf_opdone_wait(struct mantis_ca *ca)
  43 {
  44         struct mantis_pci *mantis = ca->ca_priv;
  45         int rc = 0;
  46
  47         if (wait_event_interruptible_timeout(ca->hif_opdone_wq,
  48                                              ca->hif_event & MANTIS_SBUF_OPDONE,
  49                                              msecs_to_jiffies(500)) == -ERESTARTSYS) {
  50
  51                 dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): Smart buffer operation timeout !", mantis->num);
  52                 rc = -EREMOTEIO;
  53         }
  54         ca->hif_event &= ~MANTIS_SBUF_OPDONE;
  55         udelay(5);
  56         return rc;
  57 }
  58
  59
  60 int mantis_hif_read_mem(struct mantis_ca *ca, u32 addr)
  61 {
  62         struct mantis_pci *mantis = ca->ca_priv;
  63         u32 hif_addr = 0, data, count = 4;
  64
  65         dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Read", mantis->num);
  66         hif_addr |=  MANTIS_GPIF_HIFRDWRN;
  67         hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
  68         hif_addr &= ~MANTIS_GPIF_PCMCIAIOM;
  69         hif_addr |=  addr;
  70
  71         mmwrite(hif_addr | MANTIS_HIF_STATUS, MANTIS_GPIF_BRADDR);
  72         mmwrite(count, MANTIS_GPIF_BRBYTES);
  73
  74         udelay(20);
  75
  76         mmwrite(hif_addr, MANTIS_GPIF_ADDR);
  77         if (mantis_hif_data_available(ca) != 0) {
  78                 dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): GPIF Smart Buffer burst read failed", mantis->num);
  79                 return -EREMOTEIO;
  80         }
  81         if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
  82                 dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): GPIF Smart Buffer operation failed", mantis->num);
  83                 return -EREMOTEIO;
  84         }
  85         data = mmread(MANTIS_GPIF_DIN);
  86
  87         return (data >> 24) & 0xff;
  88 }
  89
  90 int mantis_hif_write_mem(struct mantis_ca *ca, u32 addr, u8 data)
  91 {
  92         struct mantis_slot *slot = ca->slot;
  93         struct mantis_pci *mantis = ca->ca_priv;
  94         u32 hif_addr = 0;
  95
  96         dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Write", mantis->num);
  97         hif_addr &= ~MANTIS_GPIF_HIFRDWRN;
  98         hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
  99         hif_addr &= ~MANTIS_GPIF_PCMCIAIOM;
 100         hif_addr |= addr;
 101
 102         mmwrite(slot->slave_cfg, MANTIS_GPIF_CFGSLA); /* Slot0 alone for now */
 103
 104         mmwrite(hif_addr | MANTIS_HIF_STATUS, MANTIS_GPIF_ADDR);
 105         mmwrite(data, MANTIS_GPIF_DOUT);
 106         ca->hif_job_queue = MANTIS_HIF_MEMWR;
 107
 108         if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
 109                 ca->hif_job_queue &= ~MANTIS_HIF_MEMWR;
 110                 dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);
 111                 return -EREMOTEIO;
 112         }
 113         ca->hif_job_queue &= ~MANTIS_HIF_MEMWR;
 114         return 0;
 115 }
 116
 117 int mantis_hif_read_iom(struct mantis_ca *ca, u32 addr)
 118 {
 119         struct mantis_pci *mantis = ca->ca_priv;
 120         u32 data, hif_addr = 0;
 121
 122         dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Read", mantis->num);
 123         hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
 124         hif_addr |=  MANTIS_GPIF_HIFRDWRN;
 125         hif_addr |=  MANTIS_GPIF_PCMCIAIOM;
 126         hif_addr |=  addr;
 127
 128         mmwrite(hif_addr | MANTIS_HIF_STATUS, MANTIS_GPIF_ADDR);
 129         ca->hif_job_queue = MANTIS_HIF_IOMRD;
 130
 131         if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
 132                 ca->hif_job_queue &= ~MANTIS_HIF_IOMRD;
 133                 dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);
 134                 return -EREMOTEIO;
 135         }
 136         udelay(50);
 137         ca->hif_job_queue &= ~MANTIS_HIF_IOMRD;
 138         data = mmread(MANTIS_GPIF_DIN);
 139         hif_addr |= MANTIS_GPIF_PCMCIAREG;
 140         mmwrite(hif_addr, MANTIS_GPIF_ADDR);
 141
 142         return data;
 143 }
 144
 145 int mantis_hif_write_iom(struct mantis_ca *ca, u32 addr, u8 data)
 146 {
 147         struct mantis_pci *mantis = ca->ca_priv;
 148         u32 hif_addr = 0;
 149
 150         dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Write", mantis->num);
 151         hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
 152         hif_addr &= ~MANTIS_GPIF_HIFRDWRN;
 153         hif_addr |=  MANTIS_GPIF_PCMCIAIOM;
 154         hif_addr |=  addr;
 155
 156         mmwrite(hif_addr | MANTIS_HIF_STATUS, MANTIS_GPIF_ADDR);
 157         mmwrite(data, MANTIS_GPIF_DOUT);
 158
 159         ca->hif_job_queue = MANTIS_HIF_IOMWR;
 160         if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
 161                 ca->hif_job_queue &= ~MANTIS_HIF_IOMWR;
 162                 dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);
 163                 return -EREMOTEIO;
 164         }
 165         udelay(50);
 166         ca->hif_job_queue &= ~MANTIS_HIF_IOMWR;
 167         hif_addr |= MANTIS_GPIF_PCMCIAREG;
 168         mmwrite(hif_addr, MANTIS_GPIF_ADDR);
 169
 170         return 0;
 171 }
 172
 173 int mantis_hif_init(struct mantis_ca *ca)
 174 {
 175         struct mantis_slot *slot = ca->slot;
 176         struct mantis_pci *mantis = ca->ca_priv;
 177         u32 irqcfg;
 178
 179         slot[0].slave_cfg = 0x70773028;
 180         dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Initializing Mantis Host Interface", mantis->num);
 181         init_waitqueue_head(&ca->hif_data_wq);
 182         init_waitqueue_head(&ca->hif_opdone_wq);
 183
 184         irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
 185         irqcfg |= MANTIS_MASK_BRRDY;
 186         mmwrite(irqcfg, MANTIS_GPIF_IRQCFG);
 187
 188         return 0;
 189 }
 190
 191 void mantis_hif_exit(struct mantis_ca *ca)
 192 {
 193         struct mantis_pci *mantis = ca->ca_priv;
 194         u32 irqcfg;
 195
 196         dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Exiting Mantis Host Interface", mantis->num);
 197         irqcfg = mmread(MANTIS_GPIF_IRQCFG);
 198         irqcfg &= ~MANTIS_MASK_BRRDY;
 199         mmwrite(irqcfg, MANTIS_GPIF_IRQCFG);
 200 }