arch/ia64/sn/pci/pcibr/pcibr_reg.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2004 Silicon Graphics, Inc. All rights reserved.
   7  */
   8
   9 #include <linux/interrupt.h>
  10 #include <linux/types.h>
  11 #include <asm/sn/io.h>
  12 #include <asm/sn/pcibr_provider.h>
  13 #include <asm/sn/pcibus_provider_defs.h>
  14 #include <asm/sn/pcidev.h>
  15 #include <asm/sn/pic.h>
  16 #include <asm/sn/tiocp.h>
  17
  18 union br_ptr {
  19         struct tiocp tio;
  20         struct pic pic;
  21 };
  22
  23 /*
  24  * Control Register Access -- Read/Write                            0000_0020
  25  */
  26 void pcireg_control_bit_clr(struct pcibus_info *pcibus_info, u64 bits)
  27 {
  28         union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
  29
  30         if (pcibus_info) {
  31                 switch (pcibus_info->pbi_bridge_type) {
  32                 case PCIBR_BRIDGETYPE_TIOCP:
  33                         __sn_clrq_relaxed(&ptr->tio.cp_control, bits);
  34                         break;
  35                 case PCIBR_BRIDGETYPE_PIC:
  36                         __sn_clrq_relaxed(&ptr->pic.p_wid_control, bits);
  37                         break;
  38                 default:
  39                         panic
  40                             ("pcireg_control_bit_clr: unknown bridgetype bridge 0x%p",
  41                              ptr);
  42                 }
  43         }
  44 }
  45
  46 void pcireg_control_bit_set(struct pcibus_info *pcibus_info, u64 bits)
  47 {
  48         union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
  49
  50         if (pcibus_info) {
  51                 switch (pcibus_info->pbi_bridge_type) {
  52                 case PCIBR_BRIDGETYPE_TIOCP:
  53                         __sn_setq_relaxed(&ptr->tio.cp_control, bits);
  54                         break;
  55                 case PCIBR_BRIDGETYPE_PIC:
  56                         __sn_setq_relaxed(&ptr->pic.p_wid_control, bits);
  57                         break;
  58                 default:
  59                         panic
  60                             ("pcireg_control_bit_set: unknown bridgetype bridge 0x%p",
  61                              ptr);
  62                 }
  63         }
  64 }
  65
  66 /*
  67  * PCI/PCIX Target Flush Register Access -- Read Only               0000_0050
  68  */
  69 u64 pcireg_tflush_get(struct pcibus_info *pcibus_info)
  70 {
  71         union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
  72         u64 ret = 0;
  73
  74         if (pcibus_info) {
  75                 switch (pcibus_info->pbi_bridge_type) {
  76                 case PCIBR_BRIDGETYPE_TIOCP:
  77                         ret = __sn_readq_relaxed(&ptr->tio.cp_tflush);
  78                         break;
  79                 case PCIBR_BRIDGETYPE_PIC:
  80                         ret = __sn_readq_relaxed(&ptr->pic.p_wid_tflush);
  81                         break;
  82                 default:
  83                         panic
  84                             ("pcireg_tflush_get: unknown bridgetype bridge 0x%p",
  85                              ptr);
  86                 }
  87         }
  88
  89         /* Read of the Target Flush should always return zero */
  90         if (ret != 0)
  91                 panic("pcireg_tflush_get:Target Flush failed\n");
  92
  93         return ret;
  94 }
  95
  96 /*
  97  * Interrupt Status Register Access -- Read Only                    0000_0100
  98  */
  99 u64 pcireg_intr_status_get(struct pcibus_info * pcibus_info)
 100 {
 101         union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
 102         u64 ret = 0;
 103
 104         if (pcibus_info) {
 105                 switch (pcibus_info->pbi_bridge_type) {
 106                 case PCIBR_BRIDGETYPE_TIOCP:
 107                         ret = __sn_readq_relaxed(&ptr->tio.cp_int_status);
 108                         break;
 109                 case PCIBR_BRIDGETYPE_PIC:
 110                         ret = __sn_readq_relaxed(&ptr->pic.p_int_status);
 111                         break;
 112                 default:
 113                         panic
 114                             ("pcireg_intr_status_get: unknown bridgetype bridge 0x%p",
 115                              ptr);
 116                 }
 117         }
 118         return ret;
 119 }
 120
 121 /*
 122  * Interrupt Enable Register Access -- Read/Write                   0000_0108
 123  */
 124 void pcireg_intr_enable_bit_clr(struct pcibus_info *pcibus_info, u64 bits)
 125 {
 126         union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
 127
 128         if (pcibus_info) {
 129                 switch (pcibus_info->pbi_bridge_type) {
 130                 case PCIBR_BRIDGETYPE_TIOCP:
 131                         __sn_clrq_relaxed(&ptr->tio.cp_int_enable, bits);
 132                         break;
 133                 case PCIBR_BRIDGETYPE_PIC:
 134                         __sn_clrq_relaxed(&ptr->pic.p_int_enable, bits);
 135                         break;
 136                 default:
 137                         panic
 138                             ("pcireg_intr_enable_bit_clr: unknown bridgetype bridge 0x%p",
 139                              ptr);
 140                 }
 141         }
 142 }
 143
 144 void pcireg_intr_enable_bit_set(struct pcibus_info *pcibus_info, u64 bits)
 145 {
 146         union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
 147
 148         if (pcibus_info) {
 149                 switch (pcibus_info->pbi_bridge_type) {
 150                 case PCIBR_BRIDGETYPE_TIOCP:
 151                         __sn_setq_relaxed(&ptr->tio.cp_int_enable, bits);
 152                         break;
 153                 case PCIBR_BRIDGETYPE_PIC:
 154                         __sn_setq_relaxed(&ptr->pic.p_int_enable, bits);
 155                         break;
 156                 default:
 157                         panic
 158                             ("pcireg_intr_enable_bit_set: unknown bridgetype bridge 0x%p",
 159                              ptr);
 160                 }
 161         }
 162 }
 163
 164 /*
 165  * Intr Host Address Register (int_addr) -- Read/Write  0000_0130 - 0000_0168
 166  */
 167 void pcireg_intr_addr_addr_set(struct pcibus_info *pcibus_info, int int_n,
 168                                u64 addr)
 169 {
 170         union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
 171
 172         if (pcibus_info) {
 173                 switch (pcibus_info->pbi_bridge_type) {
 174                 case PCIBR_BRIDGETYPE_TIOCP:
 175                         __sn_clrq_relaxed(&ptr->tio.cp_int_addr[int_n],
 176                             TIOCP_HOST_INTR_ADDR);
 177                         __sn_setq_relaxed(&ptr->tio.cp_int_addr[int_n],
 178                             (addr & TIOCP_HOST_INTR_ADDR));
 179                         break;
 180                 case PCIBR_BRIDGETYPE_PIC:
 181                         __sn_clrq_relaxed(&ptr->pic.p_int_addr[int_n],
 182                             PIC_HOST_INTR_ADDR);
 183                         __sn_setq_relaxed(&ptr->pic.p_int_addr[int_n],
 184                             (addr & PIC_HOST_INTR_ADDR));
 185                         break;
 186                 default:
 187                         panic
 188                             ("pcireg_intr_addr_addr_get: unknown bridgetype bridge 0x%p",
 189                              ptr);
 190                 }
 191         }
 192 }
 193
 194 /*
 195  * Force Interrupt Register Access -- Write Only        0000_01C0 - 0000_01F8
 196  */
 197 void pcireg_force_intr_set(struct pcibus_info *pcibus_info, int int_n)
 198 {
 199         union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
 200
 201         if (pcibus_info) {
 202                 switch (pcibus_info->pbi_bridge_type) {
 203                 case PCIBR_BRIDGETYPE_TIOCP:
 204                         writeq(1, &ptr->tio.cp_force_pin[int_n]);
 205                         break;
 206                 case PCIBR_BRIDGETYPE_PIC:
 207                         writeq(1, &ptr->pic.p_force_pin[int_n]);
 208                         break;
 209                 default:
 210                         panic
 211                             ("pcireg_force_intr_set: unknown bridgetype bridge 0x%p",
 212                              ptr);
 213                 }
 214         }
 215 }
 216
 217 /*
 218  * Device(x) Write Buffer Flush Reg Access -- Read Only 0000_0240 - 0000_0258
 219  */
 220 u64 pcireg_wrb_flush_get(struct pcibus_info *pcibus_info, int device)
 221 {
 222         union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
 223         u64 ret = 0;
 224
 225         if (pcibus_info) {
 226                 switch (pcibus_info->pbi_bridge_type) {
 227                 case PCIBR_BRIDGETYPE_TIOCP:
 228                         ret =
 229                             __sn_readq_relaxed(&ptr->tio.cp_wr_req_buf[device]);
 230                         break;
 231                 case PCIBR_BRIDGETYPE_PIC:
 232                         ret =
 233                             __sn_readq_relaxed(&ptr->pic.p_wr_req_buf[device]);
 234                         break;
 235                 default:
 236                       panic("pcireg_wrb_flush_get: unknown bridgetype bridge 0x%p", ptr);
 237                 }
 238
 239         }
 240         /* Read of the Write Buffer Flush should always return zero */
 241         return ret;
 242 }
 243
 244 void pcireg_int_ate_set(struct pcibus_info *pcibus_info, int ate_index,
 245                         u64 val)
 246 {
 247         union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
 248
 249         if (pcibus_info) {
 250                 switch (pcibus_info->pbi_bridge_type) {
 251                 case PCIBR_BRIDGETYPE_TIOCP:
 252                         writeq(val, &ptr->tio.cp_int_ate_ram[ate_index]);
 253                         break;
 254                 case PCIBR_BRIDGETYPE_PIC:
 255                         writeq(val, &ptr->pic.p_int_ate_ram[ate_index]);
 256                         break;
 257                 default:
 258                         panic
 259                             ("pcireg_int_ate_set: unknown bridgetype bridge 0x%p",
 260                              ptr);
 261                 }
 262         }
 263 }
 264
 265 u64 __iomem *pcireg_int_ate_addr(struct pcibus_info *pcibus_info, int ate_index)
 266 {
 267         union br_ptr __iomem *ptr = (union br_ptr __iomem *)pcibus_info->pbi_buscommon.bs_base;
 268         u64 __iomem *ret = NULL;
 269
 270         if (pcibus_info) {
 271                 switch (pcibus_info->pbi_bridge_type) {
 272                 case PCIBR_BRIDGETYPE_TIOCP:
 273                         ret = &ptr->tio.cp_int_ate_ram[ate_index];
 274                         break;
 275                 case PCIBR_BRIDGETYPE_PIC:
 276                         ret = &ptr->pic.p_int_ate_ram[ate_index];
 277                         break;
 278                 default:
 279                         panic
 280                             ("pcireg_int_ate_addr: unknown bridgetype bridge 0x%p",
 281                              ptr);
 282                 }
 283         }
 284         return ret;
 285 }