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 int mantis_hif_read_mem(struct mantis_ca *ca, u32 addr)
  60 {
  61         struct mantis_pci *mantis = ca->ca_priv;
  62         u32 hif_addr = 0, data, count = 4;
  63
  64         dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Read", mantis->num);
  65         hif_addr |=  MANTIS_GPIF_HIFRDWRN;
  66         hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
  67         hif_addr &= ~MANTIS_GPIF_PCMCIAIOM;
  68         hif_addr |=  addr;
  69
  70         mmwrite(hif_addr, MANTIS_GPIF_BRADDR);
  71         mmwrite(count, MANTIS_GPIF_BRBYTES);
  72
  73         udelay(20);
  74
  75         mmwrite(hif_addr, MANTIS_GPIF_HIFADDR);
  76         if (mantis_hif_data_available(ca) != 0) {
  77                 dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): GPIF Smart Buffer burst read failed", mantis->num);
  78                 return -EREMOTEIO;
  79         }
  80         if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
  81                 dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): GPIF Smart Buffer operation failed", mantis->num);
  82                 return -EREMOTEIO;
  83         }
  84         data = mmread(MANTIS_GPIF_HIFDIN);
  85
  86         return (data >> 24) & 0xff;
  87 }
  88
  89 int mantis_hif_write_mem(struct mantis_ca *ca, u32 addr, u8 data)
  90 {
  91         struct mantis_slot *slot = ca->slot;
  92         struct mantis_pci *mantis = ca->ca_priv;
  93         u32 hif_addr = 0;
  94
  95         dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Write", mantis->num);
  96         hif_addr &= ~MANTIS_GPIF_HIFRDWRN;
  97         hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
  98         hif_addr &= ~MANTIS_GPIF_PCMCIAIOM;
  99         hif_addr |= addr;
 100
 101         mmwrite(slot->slave_cfg, MANTIS_GPIF_CFGSLA); /* Slot0 alone for now */
 102
 103         mmwrite(hif_addr, MANTIS_GPIF_HIFADDR);
 104         mmwrite(data, MANTIS_GPIF_HIFDOUT);
 105         ca->hif_job_queue = MANTIS_HIF_MEMWR;
 106
 107         if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
 108                 ca->hif_job_queue &= ~MANTIS_HIF_MEMWR;
 109                 dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);
 110                 return -EREMOTEIO;
 111         }
 112         ca->hif_job_queue &= ~MANTIS_HIF_MEMWR;
 113         return 0;
 114 }
 115
 116 int mantis_hif_read_iom(struct mantis_ca *ca, u32 addr)
 117 {
 118         struct mantis_pci *mantis = ca->ca_priv;
 119         u32 data, hif_addr = 0;
 120
 121         dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Read", mantis->num);
 122         hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
 123         hif_addr |=  MANTIS_GPIF_HIFRDWRN;
 124         hif_addr |=  MANTIS_GPIF_PCMCIAIOM;
 125         hif_addr |=  addr;
 126
 127         mmwrite(hif_addr, MANTIS_GPIF_HIFADDR);
 128         ca->hif_job_queue = MANTIS_HIF_IOMRD;
 129
 130         if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
 131                 ca->hif_job_queue &= ~MANTIS_HIF_IOMRD;
 132                 dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);
 133                 return -EREMOTEIO;
 134         }
 135         udelay(50);
 136         ca->hif_job_queue &= ~MANTIS_HIF_IOMRD;
 137         data = mmread(MANTIS_GPIF_HIFDIN);
 138         hif_addr |= MANTIS_GPIF_PCMCIAREG;
 139         mmwrite(hif_addr, MANTIS_GPIF_HIFADDR);
 140
 141         return data;
 142 }
 143
 144 int mantis_hif_write_iom(struct mantis_ca *ca, u32 addr, u8 data)
 145 {
 146         struct mantis_pci *mantis = ca->ca_priv;
 147         u32 hif_addr = 0;
 148
 149         dprintk(verbose, MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Write", mantis->num);
 150         hif_addr &= ~MANTIS_GPIF_PCMCIAREG;
 151         hif_addr &= ~MANTIS_GPIF_HIFRDWRN;
 152         hif_addr |=  MANTIS_GPIF_PCMCIAIOM;
 153         hif_addr |=  addr;
 154
 155         mmwrite(hif_addr, MANTIS_GPIF_HIFADDR);
 156         mmwrite(data, MANTIS_GPIF_HIFDOUT);
 157
 158         ca->hif_job_queue = MANTIS_HIF_IOMWR;
 159         if (mantis_hif_sbuf_opdone_wait(ca) != 0) {
 160                 ca->hif_job_queue &= ~MANTIS_HIF_IOMWR;
 161                 dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num);
 162                 return -EREMOTEIO;
 163         }
 164         udelay(50);
 165         ca->hif_job_queue &= ~MANTIS_HIF_IOMWR;
 166         hif_addr |= MANTIS_GPIF_PCMCIAREG;
 167         mmwrite(hif_addr, MANTIS_GPIF_HIFADDR);
 168
 169         return 0;
 170 }
 171
 172 int mantis_hif_init(struct mantis_ca *ca)
 173 {
 174         struct mantis_pci *mantis = ca->ca_priv;
 175         u32 irqcfg;
 176
 177         dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Initializing Mantis Host Interface", mantis->num);
 178         init_waitqueue_head(&ca->hif_data_wq);
 179         init_waitqueue_head(&ca->hif_opdone_wq);
 180
 181         irqcfg  = mmread(MANTIS_GPIF_IRQCFG);
 182         irqcfg |= MANTIS_MASK_BRRDY;
 183         mmwrite(irqcfg, MANTIS_GPIF_IRQCFG);
 184
 185         return 0;
 186 }
 187
 188 void mantis_hif_exit(struct mantis_ca *ca)
 189 {
 190         struct mantis_pci *mantis = ca->ca_priv;
 191         u32 irqcfg;
 192
 193         dprintk(verbose, MANTIS_ERROR, 1, "Adapter(%d) Exiting Mantis Host Interface", mantis->num);
 194         irqcfg = mmread(MANTIS_GPIF_IRQCFG);
 195         irqcfg &= ~MANTIS_MASK_BRRDY;
 196         mmwrite(irqcfg, MANTIS_GPIF_IRQCFG);
 197 }