~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/mips/pci/ops-msc.c

Version: ~ [ linux-5.6 ] ~ [ linux-5.5.13 ] ~ [ linux-5.4.28 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.113 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.174 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.217 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.217 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.82 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Copyright (C) 1999, 2000, 2004, 2005  MIPS Technologies, Inc.
  3  *    All rights reserved.
  4  *    Authors: Carsten Langgaard <carstenl@mips.com>
  5  *             Maciej W. Rozycki <macro@mips.com>
  6  * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org)
  7  *
  8  *  This program is free software; you can distribute it and/or modify it
  9  *  under the terms of the GNU General Public License (Version 2) as
 10  *  published by the Free Software Foundation.
 11  *
 12  *  This program is distributed in the hope it will be useful, but WITHOUT
 13  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 14  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 15  *  for more details.
 16  *
 17  *  You should have received a copy of the GNU General Public License along
 18  *  with this program; if not, write to the Free Software Foundation, Inc.,
 19  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 20  *
 21  * MIPS boards specific PCI support.
 22  *
 23  */
 24 #include <linux/types.h>
 25 #include <linux/pci.h>
 26 #include <linux/kernel.h>
 27 #include <linux/init.h>
 28 
 29 #include <asm/mips-boards/msc01_pci.h>
 30 
 31 #define PCI_ACCESS_READ  0
 32 #define PCI_ACCESS_WRITE 1
 33 
 34 /*
 35  *  PCI configuration cycle AD bus definition
 36  */
 37 /* Type 0 */
 38 #define PCI_CFG_TYPE0_REG_SHF           0
 39 #define PCI_CFG_TYPE0_FUNC_SHF          8
 40 
 41 /* Type 1 */
 42 #define PCI_CFG_TYPE1_REG_SHF           0
 43 #define PCI_CFG_TYPE1_FUNC_SHF          8
 44 #define PCI_CFG_TYPE1_DEV_SHF           11
 45 #define PCI_CFG_TYPE1_BUS_SHF           16
 46 
 47 static int msc_pcibios_config_access(unsigned char access_type,
 48         struct pci_bus *bus, unsigned int devfn, int where, u32 * data)
 49 {
 50         unsigned char busnum = bus->number;
 51         u32 intr;
 52 
 53         /* Clear status register bits. */
 54         MSC_WRITE(MSC01_PCI_INTSTAT,
 55                   (MSC01_PCI_INTCFG_MA_BIT | MSC01_PCI_INTCFG_TA_BIT));
 56 
 57         MSC_WRITE(MSC01_PCI_CFGADDR,
 58                   ((busnum << MSC01_PCI_CFGADDR_BNUM_SHF) |
 59                    (PCI_SLOT(devfn) << MSC01_PCI_CFGADDR_DNUM_SHF) |
 60                    (PCI_FUNC(devfn) << MSC01_PCI_CFGADDR_FNUM_SHF) |
 61                    ((where / 4) << MSC01_PCI_CFGADDR_RNUM_SHF)));
 62 
 63         /* Perform access */
 64         if (access_type == PCI_ACCESS_WRITE)
 65                 MSC_WRITE(MSC01_PCI_CFGDATA, *data);
 66         else
 67                 MSC_READ(MSC01_PCI_CFGDATA, *data);
 68 
 69         /* Detect Master/Target abort */
 70         MSC_READ(MSC01_PCI_INTSTAT, intr);
 71         if (intr & (MSC01_PCI_INTCFG_MA_BIT | MSC01_PCI_INTCFG_TA_BIT)) {
 72                 /* Error occurred */
 73 
 74                 /* Clear bits */
 75                 MSC_WRITE(MSC01_PCI_INTSTAT,
 76                           (MSC01_PCI_INTCFG_MA_BIT | MSC01_PCI_INTCFG_TA_BIT));
 77 
 78                 return -1;
 79         }
 80 
 81         return 0;
 82 }
 83 
 84 
 85 /*
 86  * We can't address 8 and 16 bit words directly.  Instead we have to
 87  * read/write a 32bit word and mask/modify the data we actually want.
 88  */
 89 static int msc_pcibios_read(struct pci_bus *bus, unsigned int devfn,
 90                              int where, int size, u32 * val)
 91 {
 92         u32 data = 0;
 93 
 94         if ((size == 2) && (where & 1))
 95                 return PCIBIOS_BAD_REGISTER_NUMBER;
 96         else if ((size == 4) && (where & 3))
 97                 return PCIBIOS_BAD_REGISTER_NUMBER;
 98 
 99         if (msc_pcibios_config_access(PCI_ACCESS_READ, bus, devfn, where,
100                                       &data))
101                 return -1;
102 
103         if (size == 1)
104                 *val = (data >> ((where & 3) << 3)) & 0xff;
105         else if (size == 2)
106                 *val = (data >> ((where & 3) << 3)) & 0xffff;
107         else
108                 *val = data;
109 
110         return PCIBIOS_SUCCESSFUL;
111 }
112 
113 static int msc_pcibios_write(struct pci_bus *bus, unsigned int devfn,
114                               int where, int size, u32 val)
115 {
116         u32 data = 0;
117 
118         if ((size == 2) && (where & 1))
119                 return PCIBIOS_BAD_REGISTER_NUMBER;
120         else if ((size == 4) && (where & 3))
121                 return PCIBIOS_BAD_REGISTER_NUMBER;
122 
123         if (size == 4)
124                 data = val;
125         else {
126                 if (msc_pcibios_config_access(PCI_ACCESS_READ, bus, devfn,
127                                               where, &data))
128                         return -1;
129 
130                 if (size == 1)
131                         data = (data & ~(0xff << ((where & 3) << 3))) |
132                                 (val << ((where & 3) << 3));
133                 else if (size == 2)
134                         data = (data & ~(0xffff << ((where & 3) << 3))) |
135                                 (val << ((where & 3) << 3));
136         }
137 
138         if (msc_pcibios_config_access(PCI_ACCESS_WRITE, bus, devfn, where,
139                                        &data))
140                 return -1;
141 
142         return PCIBIOS_SUCCESSFUL;
143 }
144 
145 struct pci_ops msc_pci_ops = {
146         .read = msc_pcibios_read,
147         .write = msc_pcibios_write
148 };
149 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp