Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2001 MontaVista Software Inc. |
| 3 | * Author: MontaVista Software, Inc. |
Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 4 | * ahennessy@mvista.com |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 6 | * Copyright (C) 2000-2001 Toshiba Corporation |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org) |
| 8 | * |
| 9 | * Based on arch/mips/ddb5xxx/ddb5477/pci_ops.c |
| 10 | * |
| 11 | * Define the pci_ops for the Toshiba rbtx4927 |
| 12 | * |
Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 13 | * Much of the code is derived from the original DDB5074 port by |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | * Geert Uytterhoeven <geert@sonycom.com> |
| 15 | * |
| 16 | * Copyright 2004 MontaVista Software Inc. |
| 17 | * Author: Manish Lachwani (mlachwani@mvista.com) |
| 18 | * |
| 19 | * This program is free software; you can redistribute it and/or modify it |
| 20 | * under the terms of the GNU General Public License as published by the |
| 21 | * Free Software Foundation; either version 2 of the License, or (at your |
| 22 | * option) any later version. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 27 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 28 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 29 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 30 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 31 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 32 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 33 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 34 | * |
| 35 | * You should have received a copy of the GNU General Public License along |
| 36 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 37 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 38 | */ |
| 39 | #include <linux/types.h> |
| 40 | #include <linux/pci.h> |
| 41 | #include <linux/kernel.h> |
| 42 | #include <linux/init.h> |
Atsushi Nemoto | 22b1d70 | 2008-07-11 00:31:36 +0900 | [diff] [blame^] | 43 | #include <asm/txx9/tx4927.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | |
| 45 | /* initialize in setup */ |
| 46 | struct resource pci_io_resource = { |
| 47 | .name = "TX4927 PCI IO SPACE", |
| 48 | .start = 0x1000, |
| 49 | .end = (0x1000 + (TX4927_PCIIO_SIZE)) - 1, |
| 50 | .flags = IORESOURCE_IO |
| 51 | }; |
| 52 | |
| 53 | /* initialize in setup */ |
| 54 | struct resource pci_mem_resource = { |
| 55 | .name = "TX4927 PCI MEM SPACE", |
| 56 | .start = TX4927_PCIMEM, |
| 57 | .end = TX4927_PCIMEM + TX4927_PCIMEM_SIZE - 1, |
| 58 | .flags = IORESOURCE_MEM |
| 59 | }; |
| 60 | |
| 61 | static int mkaddr(int bus, int dev_fn, int where, int *flagsp) |
| 62 | { |
| 63 | if (bus > 0) { |
| 64 | /* Type 1 configuration */ |
| 65 | tx4927_pcicptr->g2pcfgadrs = ((bus & 0xff) << 0x10) | |
| 66 | ((dev_fn & 0xff) << 0x08) | (where & 0xfc) | 1; |
| 67 | } else { |
| 68 | if (dev_fn >= PCI_DEVFN(TX4927_PCIC_MAX_DEVNU, 0)) |
| 69 | return -1; |
| 70 | |
| 71 | /* Type 0 configuration */ |
| 72 | tx4927_pcicptr->g2pcfgadrs = ((bus & 0xff) << 0x10) | |
| 73 | ((dev_fn & 0xff) << 0x08) | (where & 0xfc); |
| 74 | } |
| 75 | /* clear M_ABORT and Disable M_ABORT Int. */ |
| 76 | tx4927_pcicptr->pcistatus = |
| 77 | (tx4927_pcicptr->pcistatus & 0x0000ffff) | |
| 78 | (PCI_STATUS_REC_MASTER_ABORT << 16); |
| 79 | tx4927_pcicptr->pcimask &= ~PCI_STATUS_REC_MASTER_ABORT; |
| 80 | return 0; |
| 81 | } |
| 82 | |
| 83 | static int check_abort(int flags) |
| 84 | { |
| 85 | int code = PCIBIOS_SUCCESSFUL; |
| 86 | if (tx4927_pcicptr-> |
| 87 | pcistatus & (PCI_STATUS_REC_MASTER_ABORT << 16)) { |
| 88 | tx4927_pcicptr->pcistatus = |
| 89 | (tx4927_pcicptr-> |
| 90 | pcistatus & 0x0000ffff) | (PCI_STATUS_REC_MASTER_ABORT |
| 91 | << 16); |
| 92 | tx4927_pcicptr->pcimask |= PCI_STATUS_REC_MASTER_ABORT; |
| 93 | code = PCIBIOS_DEVICE_NOT_FOUND; |
| 94 | } |
| 95 | return code; |
| 96 | } |
| 97 | |
| 98 | static int tx4927_pcibios_read_config(struct pci_bus *bus, unsigned int devfn, int where, |
| 99 | int size, u32 * val) |
| 100 | { |
| 101 | int flags, retval, dev, busno, func; |
| 102 | |
| 103 | busno = bus->number; |
| 104 | dev = PCI_SLOT(devfn); |
| 105 | func = PCI_FUNC(devfn); |
| 106 | |
| 107 | /* check if the bus is top-level */ |
| 108 | if (bus->parent != NULL) { |
| 109 | busno = bus->number; |
| 110 | } else { |
| 111 | busno = 0; |
| 112 | } |
| 113 | |
| 114 | if (mkaddr(busno, devfn, where, &flags)) |
| 115 | return -1; |
| 116 | |
| 117 | switch (size) { |
| 118 | case 1: |
Ralf Baechle | fc10334 | 2006-06-28 11:24:12 +0100 | [diff] [blame] | 119 | *val = *(volatile u8 *) ((unsigned long) & tx4927_pcicptr-> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | g2pcfgdata | |
| 121 | #ifdef __LITTLE_ENDIAN |
| 122 | (where & 3)); |
| 123 | #else |
| 124 | ((where & 0x3) ^ 0x3)); |
| 125 | #endif |
| 126 | break; |
| 127 | case 2: |
Ralf Baechle | fc10334 | 2006-06-28 11:24:12 +0100 | [diff] [blame] | 128 | *val = *(volatile u16 *) ((unsigned long) & tx4927_pcicptr-> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | g2pcfgdata | |
| 130 | #ifdef __LITTLE_ENDIAN |
| 131 | (where & 3)); |
| 132 | #else |
| 133 | ((where & 0x3) ^ 0x2)); |
| 134 | #endif |
| 135 | break; |
| 136 | case 4: |
| 137 | *val = tx4927_pcicptr->g2pcfgdata; |
| 138 | break; |
| 139 | } |
| 140 | |
| 141 | retval = check_abort(flags); |
| 142 | if (retval == PCIBIOS_DEVICE_NOT_FOUND) |
| 143 | *val = 0xffffffff; |
| 144 | |
| 145 | return retval; |
| 146 | } |
| 147 | |
| 148 | static int tx4927_pcibios_write_config(struct pci_bus *bus, unsigned int devfn, int where, |
| 149 | int size, u32 val) |
| 150 | { |
| 151 | int flags, dev, busno, func; |
| 152 | busno = bus->number; |
| 153 | dev = PCI_SLOT(devfn); |
| 154 | func = PCI_FUNC(devfn); |
| 155 | |
| 156 | /* check if the bus is top-level */ |
| 157 | if (bus->parent != NULL) { |
| 158 | busno = bus->number; |
| 159 | } else { |
| 160 | busno = 0; |
| 161 | } |
| 162 | |
| 163 | if (mkaddr(busno, devfn, where, &flags)) |
| 164 | return -1; |
| 165 | |
| 166 | switch (size) { |
| 167 | case 1: |
Ralf Baechle | fc10334 | 2006-06-28 11:24:12 +0100 | [diff] [blame] | 168 | *(volatile u8 *) ((unsigned long) & tx4927_pcicptr-> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | g2pcfgdata | |
| 170 | #ifdef __LITTLE_ENDIAN |
| 171 | (where & 3)) = val; |
| 172 | #else |
| 173 | ((where & 0x3) ^ 0x3)) = val; |
| 174 | #endif |
| 175 | break; |
| 176 | |
| 177 | case 2: |
Ralf Baechle | fc10334 | 2006-06-28 11:24:12 +0100 | [diff] [blame] | 178 | *(volatile u16 *) ((unsigned long) & tx4927_pcicptr-> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | g2pcfgdata | |
| 180 | #ifdef __LITTLE_ENDIAN |
| 181 | (where & 3)) = val; |
| 182 | #else |
| 183 | ((where & 0x3) ^ 0x2)) = val; |
| 184 | #endif |
| 185 | break; |
| 186 | case 4: |
| 187 | tx4927_pcicptr->g2pcfgdata = val; |
| 188 | break; |
| 189 | } |
| 190 | |
| 191 | return check_abort(flags); |
| 192 | } |
| 193 | |
| 194 | struct pci_ops tx4927_pci_ops = { |
| 195 | tx4927_pcibios_read_config, |
| 196 | tx4927_pcibios_write_config |
| 197 | }; |
| 198 | |
| 199 | /* |
| 200 | * h/w only supports devices 0x00 to 0x14 |
| 201 | */ |
| 202 | struct pci_controller tx4927_controller = { |
| 203 | .pci_ops = &tx4927_pci_ops, |
| 204 | .io_resource = &pci_io_resource, |
| 205 | .mem_resource = &pci_mem_resource, |
| 206 | }; |