1 /* 2 Mantis PCI bridge driver 3 4 Copyright (C) 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 <linux/kernel.h> 22 #include <linux/signal.h> 23 #include <linux/sched.h> 24 25 #include <linux/interrupt.h> 26 #include <asm/io.h> 27 28 #include <media/dmxdev.h> 29 #include <media/dvbdev.h> 30 #include <media/dvb_demux.h> 31 #include <media/dvb_frontend.h> 32 #include <media/dvb_net.h> 33 34 #include "mantis_common.h" 35 36 #include "mantis_hif.h" 37 #include "mantis_link.h" /* temporary due to physical layer stuff */ 38 39 #include "mantis_reg.h" 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_timeout(ca->hif_opdone_wq, 48 ca->hif_event & MANTIS_SBUF_OPDONE, 49 msecs_to_jiffies(500)) == -ERESTARTSYS) { 50 51 dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): Smart buffer operation timeout !", mantis->num); 52 rc = -EREMOTEIO; 53 } 54 dprintk(MANTIS_DEBUG, 1, "Smart Buffer Operation complete"); 55 ca->hif_event &= ~MANTIS_SBUF_OPDONE; 56 return rc; 57 } 58 59 static int mantis_hif_write_wait(struct mantis_ca *ca) 60 { 61 struct mantis_pci *mantis = ca->ca_priv; 62 u32 opdone = 0, timeout = 0; 63 int rc = 0; 64 65 if (wait_event_timeout(ca->hif_write_wq, 66 mantis->gpif_status & MANTIS_GPIF_WRACK, 67 msecs_to_jiffies(500)) == -ERESTARTSYS) { 68 69 dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): Write ACK timed out !", mantis->num); 70 rc = -EREMOTEIO; 71 } 72 dprintk(MANTIS_DEBUG, 1, "Write Acknowledged"); 73 mantis->gpif_status &= ~MANTIS_GPIF_WRACK; 74 while (!opdone) { 75 opdone = (mmread(MANTIS_GPIF_STATUS) & MANTIS_SBUF_OPDONE); 76 udelay(500); 77 timeout++; 78 if (timeout > 100) { 79 dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): Write operation timed out!", mantis->num); 80 rc = -ETIMEDOUT; 81 break; 82 } 83 } 84 dprintk(MANTIS_DEBUG, 1, "HIF Write success"); 85 return rc; 86 } 87 88 89 int mantis_hif_read_mem(struct mantis_ca *ca, u32 addr) 90 { 91 struct mantis_pci *mantis = ca->ca_priv; 92 u32 hif_addr = 0, data, count = 4; 93 94 dprintk(MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Read", mantis->num); 95 mutex_lock(&ca->ca_lock); 96 hif_addr &= ~MANTIS_GPIF_PCMCIAREG; 97 hif_addr &= ~MANTIS_GPIF_PCMCIAIOM; 98 hif_addr |= MANTIS_HIF_STATUS; 99 hif_addr |= addr; 100 101 mmwrite(hif_addr, MANTIS_GPIF_BRADDR); 102 mmwrite(count, MANTIS_GPIF_BRBYTES); 103 udelay(20); 104 mmwrite(hif_addr | MANTIS_GPIF_HIFRDWRN, MANTIS_GPIF_ADDR); 105 106 if (mantis_hif_sbuf_opdone_wait(ca) != 0) { 107 dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): GPIF Smart Buffer operation failed", mantis->num); 108 mutex_unlock(&ca->ca_lock); 109 return -EREMOTEIO; 110 } 111 data = mmread(MANTIS_GPIF_DIN); 112 mutex_unlock(&ca->ca_lock); 113 dprintk(MANTIS_DEBUG, 1, "Mem Read: 0x%02x", data); 114 return (data >> 24) & 0xff; 115 } 116 117 int mantis_hif_write_mem(struct mantis_ca *ca, u32 addr, u8 data) 118 { 119 struct mantis_slot *slot = ca->slot; 120 struct mantis_pci *mantis = ca->ca_priv; 121 u32 hif_addr = 0; 122 123 dprintk(MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF Mem Write", mantis->num); 124 mutex_lock(&ca->ca_lock); 125 hif_addr &= ~MANTIS_GPIF_HIFRDWRN; 126 hif_addr &= ~MANTIS_GPIF_PCMCIAREG; 127 hif_addr &= ~MANTIS_GPIF_PCMCIAIOM; 128 hif_addr |= MANTIS_HIF_STATUS; 129 hif_addr |= addr; 130 131 mmwrite(slot->slave_cfg, MANTIS_GPIF_CFGSLA); /* Slot0 alone for now */ 132 mmwrite(hif_addr, MANTIS_GPIF_ADDR); 133 mmwrite(data, MANTIS_GPIF_DOUT); 134 135 if (mantis_hif_write_wait(ca) != 0) { 136 dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num); 137 mutex_unlock(&ca->ca_lock); 138 return -EREMOTEIO; 139 } 140 dprintk(MANTIS_DEBUG, 1, "Mem Write: (0x%02x to 0x%02x)", data, addr); 141 mutex_unlock(&ca->ca_lock); 142 143 return 0; 144 } 145 146 int mantis_hif_read_iom(struct mantis_ca *ca, u32 addr) 147 { 148 struct mantis_pci *mantis = ca->ca_priv; 149 u32 data, hif_addr = 0; 150 151 dprintk(MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Read", mantis->num); 152 mutex_lock(&ca->ca_lock); 153 hif_addr &= ~MANTIS_GPIF_PCMCIAREG; 154 hif_addr |= MANTIS_GPIF_PCMCIAIOM; 155 hif_addr |= MANTIS_HIF_STATUS; 156 hif_addr |= addr; 157 158 mmwrite(hif_addr, MANTIS_GPIF_BRADDR); 159 mmwrite(1, MANTIS_GPIF_BRBYTES); 160 udelay(20); 161 mmwrite(hif_addr | MANTIS_GPIF_HIFRDWRN, MANTIS_GPIF_ADDR); 162 163 if (mantis_hif_sbuf_opdone_wait(ca) != 0) { 164 dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num); 165 mutex_unlock(&ca->ca_lock); 166 return -EREMOTEIO; 167 } 168 data = mmread(MANTIS_GPIF_DIN); 169 dprintk(MANTIS_DEBUG, 1, "I/O Read: 0x%02x", data); 170 udelay(50); 171 mutex_unlock(&ca->ca_lock); 172 173 return (u8) data; 174 } 175 176 int mantis_hif_write_iom(struct mantis_ca *ca, u32 addr, u8 data) 177 { 178 struct mantis_pci *mantis = ca->ca_priv; 179 u32 hif_addr = 0; 180 181 dprintk(MANTIS_DEBUG, 1, "Adapter(%d) Slot(0): Request HIF I/O Write", mantis->num); 182 mutex_lock(&ca->ca_lock); 183 hif_addr &= ~MANTIS_GPIF_PCMCIAREG; 184 hif_addr &= ~MANTIS_GPIF_HIFRDWRN; 185 hif_addr |= MANTIS_GPIF_PCMCIAIOM; 186 hif_addr |= MANTIS_HIF_STATUS; 187 hif_addr |= addr; 188 189 mmwrite(hif_addr, MANTIS_GPIF_ADDR); 190 mmwrite(data, MANTIS_GPIF_DOUT); 191 192 if (mantis_hif_write_wait(ca) != 0) { 193 dprintk(MANTIS_ERROR, 1, "Adapter(%d) Slot(0): HIF Smart Buffer operation failed", mantis->num); 194 mutex_unlock(&ca->ca_lock); 195 return -EREMOTEIO; 196 } 197 dprintk(MANTIS_DEBUG, 1, "I/O Write: (0x%02x to 0x%02x)", data, addr); 198 mutex_unlock(&ca->ca_lock); 199 udelay(50); 200 201 return 0; 202 } 203 204 int mantis_hif_init(struct mantis_ca *ca) 205 { 206 struct mantis_slot *slot = ca->slot; 207 struct mantis_pci *mantis = ca->ca_priv; 208 u32 irqcfg; 209 210 slot[0].slave_cfg = 0x70773028; 211 dprintk(MANTIS_ERROR, 1, "Adapter(%d) Initializing Mantis Host Interface", mantis->num); 212 213 mutex_lock(&ca->ca_lock); 214 irqcfg = mmread(MANTIS_GPIF_IRQCFG); 215 irqcfg = MANTIS_MASK_BRRDY | 216 MANTIS_MASK_WRACK | 217 MANTIS_MASK_EXTIRQ | 218 MANTIS_MASK_WSTO | 219 MANTIS_MASK_OTHERR | 220 MANTIS_MASK_OVFLW; 221 222 mmwrite(irqcfg, MANTIS_GPIF_IRQCFG); 223 mutex_unlock(&ca->ca_lock); 224 225 return 0; 226 } 227 228 void mantis_hif_exit(struct mantis_ca *ca) 229 { 230 struct mantis_pci *mantis = ca->ca_priv; 231 u32 irqcfg; 232 233 dprintk(MANTIS_ERROR, 1, "Adapter(%d) Exiting Mantis Host Interface", mantis->num); 234 mutex_lock(&ca->ca_lock); 235 irqcfg = mmread(MANTIS_GPIF_IRQCFG); 236 irqcfg &= ~MANTIS_MASK_BRRDY; 237 mmwrite(irqcfg, MANTIS_GPIF_IRQCFG); 238 mutex_unlock(&ca->ca_lock); 239 } 240