arch/sh/drivers/pci/ops-dreamcast.c

   1 /*
   2  * arch/sh/drivers/pci/ops-dreamcast.c
   3  *
   4  * PCI operations for the Sega Dreamcast
   5  *
   6  * Copyright (C) 2001, 2002  M. R. Brown
   7  * Copyright (C) 2002, 2003  Paul Mundt
   8  *
   9  * This file originally bore the message (with enclosed-$):
  10  *      Id: pci.c,v 1.3 2003/05/04 19:29:46 lethal Exp
  11  *      Dreamcast PCI: Supports SEGA Broadband Adaptor only.
  12  *
  13  * This file is subject to the terms and conditions of the GNU General Public
  14  * License.  See the file "COPYING" in the main directory of this archive
  15  * for more details.
  16  */
  17
  18 #include <linux/sched.h>
  19 #include <linux/kernel.h>
  20 #include <linux/param.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/init.h>
  23 #include <linux/irq.h>
  24 #include <linux/pci.h>
  25
  26 #include <asm/io.h>
  27 #include <asm/irq.h>
  28 #include <asm/mach/pci.h>
  29
  30 static struct resource gapspci_io_resource = {
  31         .name   = "GAPSPCI IO",
  32         .start  = GAPSPCI_BBA_CONFIG,
  33         .end    = GAPSPCI_BBA_CONFIG + GAPSPCI_BBA_CONFIG_SIZE - 1,
  34         .flags  = IORESOURCE_IO,
  35 };
  36
  37 static struct resource gapspci_mem_resource = {
  38         .name   = "GAPSPCI mem",
  39         .start  = GAPSPCI_DMA_BASE,
  40         .end    = GAPSPCI_DMA_BASE + GAPSPCI_DMA_SIZE - 1,
  41         .flags  = IORESOURCE_MEM,
  42 };
  43
  44 static struct pci_ops gapspci_pci_ops;
  45
  46 struct pci_channel board_pci_channels[] = {
  47         { &gapspci_pci_ops, &gapspci_io_resource,
  48           &gapspci_mem_resource, 0, 1 },
  49         { 0, }
  50 };
  51
  52 /*
  53  * The !gapspci_config_access case really shouldn't happen, ever, unless
  54  * someone implicitly messes around with the last devfn value.. otherwise we
  55  * only support a single device anyways, and if we didn't have a BBA, we
  56  * wouldn't make it terribly far through the PCI setup anyways.
  57  *
  58  * Also, we could very easily support both Type 0 and Type 1 configurations
  59  * here, but since it doesn't seem that there is any such implementation in
  60  * existence, we don't bother.
  61  *
  62  * I suppose if someone actually gets around to ripping the chip out of
  63  * the BBA and hanging some more devices off of it, then this might be
  64  * something to take into consideration. However, due to the cost of the BBA,
  65  * and the general lack of activity by DC hardware hackers, this doesn't seem
  66  * likely to happen anytime soon.
  67  */
  68 static int gapspci_config_access(unsigned char bus, unsigned int devfn)
  69 {
  70         return (bus == 0) && (devfn == 0);
  71 }
  72
  73 /*
  74  * We can also actually read and write in b/w/l sizes! Thankfully this part
  75  * was at least done right, and we don't have to do the stupid masking and
  76  * shifting that we do on the 7751! Small wonders never cease to amaze.
  77  */
  78 static int gapspci_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val)
  79 {
  80         *val = 0xffffffff;
  81
  82         if (!gapspci_config_access(bus->number, devfn))
  83                 return PCIBIOS_DEVICE_NOT_FOUND;
  84
  85         switch (size) {
  86 <<<<<<< HEAD:arch/sh/drivers/pci/ops-dreamcast.c
  87                 case 1: *val = ctrl_inb(GAPSPCI_BBA_CONFIG+where); break;
  88                 case 2: *val = ctrl_inw(GAPSPCI_BBA_CONFIG+where); break;
  89                 case 4: *val = ctrl_inl(GAPSPCI_BBA_CONFIG+where); break;
  90 =======
  91                 case 1: *val = inb(GAPSPCI_BBA_CONFIG+where); break;
  92                 case 2: *val = inw(GAPSPCI_BBA_CONFIG+where); break;
  93                 case 4: *val = inl(GAPSPCI_BBA_CONFIG+where); break;
  94 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/drivers/pci/ops-dreamcast.c
  95         }
  96
  97         return PCIBIOS_SUCCESSFUL;
  98 }
  99
 100 static int gapspci_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val)
 101 {
 102         if (!gapspci_config_access(bus->number, devfn))
 103                 return PCIBIOS_DEVICE_NOT_FOUND;
 104
 105         switch (size) {
 106 <<<<<<< HEAD:arch/sh/drivers/pci/ops-dreamcast.c
 107                 case 1: ctrl_outb(( u8)val, GAPSPCI_BBA_CONFIG+where); break;
 108                 case 2: ctrl_outw((u16)val, GAPSPCI_BBA_CONFIG+where); break;
 109                 case 4: ctrl_outl((u32)val, GAPSPCI_BBA_CONFIG+where); break;
 110 =======
 111                 case 1: outb(( u8)val, GAPSPCI_BBA_CONFIG+where); break;
 112                 case 2: outw((u16)val, GAPSPCI_BBA_CONFIG+where); break;
 113                 case 4: outl((u32)val, GAPSPCI_BBA_CONFIG+where); break;
 114 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/drivers/pci/ops-dreamcast.c
 115         }
 116
 117         return PCIBIOS_SUCCESSFUL;
 118 }
 119
 120 static struct pci_ops gapspci_pci_ops = {
 121         .read   = gapspci_read,
 122         .write  = gapspci_write,
 123 };
 124
 125 /*
 126  * gapspci init
 127  */
 128
 129 int __init gapspci_init(void)
 130 {
 131         char idbuf[16];
 132         int i;
 133
 134         /*
 135          * FIXME: All of this wants documenting to some degree,
 136          * even some basic register definitions would be nice.
 137          *
 138          * I haven't seen anything this ugly since.. maple.
 139          */
 140
 141         for (i=0; i<16; i++)
 142 <<<<<<< HEAD:arch/sh/drivers/pci/ops-dreamcast.c
 143                 idbuf[i] = ctrl_inb(GAPSPCI_REGS+i);
 144 =======
 145                 idbuf[i] = inb(GAPSPCI_REGS+i);
 146 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/drivers/pci/ops-dreamcast.c
 147
 148         if (strncmp(idbuf, "GAPSPCI_BRIDGE_2", 16))
 149                 return -ENODEV;
 150
 151 <<<<<<< HEAD:arch/sh/drivers/pci/ops-dreamcast.c
 152         ctrl_outl(0x5a14a501, GAPSPCI_REGS+0x18);
 153 =======
 154         outl(0x5a14a501, GAPSPCI_REGS+0x18);
 155 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/drivers/pci/ops-dreamcast.c
 156
 157         for (i=0; i<1000000; i++)
 158                 ;
 159
 160 <<<<<<< HEAD:arch/sh/drivers/pci/ops-dreamcast.c
 161         if (ctrl_inl(GAPSPCI_REGS+0x18) != 1)
 162 =======
 163         if (inl(GAPSPCI_REGS+0x18) != 1)
 164 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/drivers/pci/ops-dreamcast.c
 165                 return -EINVAL;
 166
 167 <<<<<<< HEAD:arch/sh/drivers/pci/ops-dreamcast.c
 168         ctrl_outl(0x01000000, GAPSPCI_REGS+0x20);
 169         ctrl_outl(0x01000000, GAPSPCI_REGS+0x24);
 170 =======
 171         outl(0x01000000, GAPSPCI_REGS+0x20);
 172         outl(0x01000000, GAPSPCI_REGS+0x24);
 173 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/drivers/pci/ops-dreamcast.c
 174
 175 <<<<<<< HEAD:arch/sh/drivers/pci/ops-dreamcast.c
 176         ctrl_outl(GAPSPCI_DMA_BASE, GAPSPCI_REGS+0x28);
 177         ctrl_outl(GAPSPCI_DMA_BASE+GAPSPCI_DMA_SIZE, GAPSPCI_REGS+0x2c);
 178 =======
 179         outl(GAPSPCI_DMA_BASE, GAPSPCI_REGS+0x28);
 180         outl(GAPSPCI_DMA_BASE+GAPSPCI_DMA_SIZE, GAPSPCI_REGS+0x2c);
 181 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/drivers/pci/ops-dreamcast.c
 182
 183 <<<<<<< HEAD:arch/sh/drivers/pci/ops-dreamcast.c
 184         ctrl_outl(1, GAPSPCI_REGS+0x14);
 185         ctrl_outl(1, GAPSPCI_REGS+0x34);
 186 =======
 187         outl(1, GAPSPCI_REGS+0x14);
 188         outl(1, GAPSPCI_REGS+0x34);
 189 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/drivers/pci/ops-dreamcast.c
 190
 191         /* Setting Broadband Adapter */
 192 <<<<<<< HEAD:arch/sh/drivers/pci/ops-dreamcast.c
 193         ctrl_outw(0xf900, GAPSPCI_BBA_CONFIG+0x06);
 194         ctrl_outl(0x00000000, GAPSPCI_BBA_CONFIG+0x30);
 195         ctrl_outb(0x00, GAPSPCI_BBA_CONFIG+0x3c);
 196         ctrl_outb(0xf0, GAPSPCI_BBA_CONFIG+0x0d);
 197         ctrl_outw(0x0006, GAPSPCI_BBA_CONFIG+0x04);
 198         ctrl_outl(0x00002001, GAPSPCI_BBA_CONFIG+0x10);
 199         ctrl_outl(0x01000000, GAPSPCI_BBA_CONFIG+0x14);
 200 =======
 201         outw(0xf900, GAPSPCI_BBA_CONFIG+0x06);
 202         outl(0x00000000, GAPSPCI_BBA_CONFIG+0x30);
 203         outb(0x00, GAPSPCI_BBA_CONFIG+0x3c);
 204         outb(0xf0, GAPSPCI_BBA_CONFIG+0x0d);
 205         outw(0x0006, GAPSPCI_BBA_CONFIG+0x04);
 206         outl(0x00002001, GAPSPCI_BBA_CONFIG+0x10);
 207         outl(0x01000000, GAPSPCI_BBA_CONFIG+0x14);
 208 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/drivers/pci/ops-dreamcast.c
 209
 210         return 0;
 211 }
 212
 213 /* Haven't done anything here as yet */
 214 char * __devinit pcibios_setup(char *str)
 215 {
 216         return str;
 217 }