release/src-rt-6.x.4708/linux/linux-2.6.36/arch/mips/pci/pci-rc32434.c

   1 /*
   2  *  BRIEF MODULE DESCRIPTION
   3  *     PCI initialization for IDT EB434 board
   4  *
   5  *  Copyright 2004 IDT Inc. (rischelp@idt.com)
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  *
  12  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  13  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  14  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  15  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  16  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  17  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  18  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  19  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  20  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  21  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  22  *
  23  *  You should have received a copy of the  GNU General Public License along
  24  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  25  *  675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #include <linux/types.h>
  29 #include <linux/pci.h>
  30 #include <linux/kernel.h>
  31 #include <linux/init.h>
  32
  33 #include <asm/mach-rc32434/rc32434.h>
  34 #include <asm/mach-rc32434/pci.h>
  35
  36 #define PCI_ACCESS_READ  0
  37 #define PCI_ACCESS_WRITE 1
  38
  39 /* define an unsigned array for the PCI registers */
  40 static unsigned int korina_cnfg_regs[25] = {
  41         KORINA_CNFG1, KORINA_CNFG2, KORINA_CNFG3, KORINA_CNFG4,
  42         KORINA_CNFG5, KORINA_CNFG6, KORINA_CNFG7, KORINA_CNFG8,
  43         KORINA_CNFG9, KORINA_CNFG10, KORINA_CNFG11, KORINA_CNFG12,
  44         KORINA_CNFG13, KORINA_CNFG14, KORINA_CNFG15, KORINA_CNFG16,
  45         KORINA_CNFG17, KORINA_CNFG18, KORINA_CNFG19, KORINA_CNFG20,
  46         KORINA_CNFG21, KORINA_CNFG22, KORINA_CNFG23, KORINA_CNFG24
  47 };
  48 static struct resource rc32434_res_pci_mem1;
  49 static struct resource rc32434_res_pci_mem2;
  50
  51 static struct resource rc32434_res_pci_mem1 = {
  52         .name = "PCI MEM1",
  53         .start = 0x50000000,
  54         .end = 0x5FFFFFFF,
  55         .flags = IORESOURCE_MEM,
  56         .parent = &rc32434_res_pci_mem1,
  57         .sibling = NULL,
  58         .child = &rc32434_res_pci_mem2
  59 };
  60
  61 static struct resource rc32434_res_pci_mem2 = {
  62         .name = "PCI Mem2",
  63         .start = 0x60000000,
  64         .end = 0x6FFFFFFF,
  65         .flags = IORESOURCE_MEM,
  66         .parent = &rc32434_res_pci_mem1,
  67         .sibling = NULL,
  68         .child = NULL
  69 };
  70
  71 static struct resource rc32434_res_pci_io1 = {
  72         .name = "PCI I/O1",
  73         .start = 0x18800000,
  74         .end = 0x188FFFFF,
  75         .flags = IORESOURCE_IO,
  76 };
  77
  78 extern struct pci_ops rc32434_pci_ops;
  79
  80 #define PCI_MEM1_START  PCI_ADDR_START
  81 #define PCI_MEM1_END    (PCI_ADDR_START + CPUTOPCI_MEM_WIN - 1)
  82 #define PCI_MEM2_START  (PCI_ADDR_START + CPUTOPCI_MEM_WIN)
  83 #define PCI_MEM2_END    (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN)  - 1)
  84 #define PCI_IO1_START   (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN))
  85 #define PCI_IO1_END                                                     \
  86         (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + CPUTOPCI_IO_WIN - 1)
  87 #define PCI_IO2_START                                                   \
  88         (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + CPUTOPCI_IO_WIN)
  89 #define PCI_IO2_END                                                     \
  90         (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + (2 * CPUTOPCI_IO_WIN) - 1)
  91
  92 struct pci_controller rc32434_controller2;
  93
  94 struct pci_controller rc32434_controller = {
  95         .pci_ops = &rc32434_pci_ops,
  96         .mem_resource = &rc32434_res_pci_mem1,
  97         .io_resource = &rc32434_res_pci_io1,
  98         .mem_offset = 0,
  99         .io_offset = 0,
 100
 101 };
 102
 103 #ifdef __MIPSEB__
 104 #define PCI_ENDIAN_FLAG PCILBAC_sb_m
 105 #else
 106 #define PCI_ENDIAN_FLAG 0
 107 #endif
 108
 109 static int __init rc32434_pcibridge_init(void)
 110 {
 111         unsigned int pcicvalue, pcicdata = 0;
 112         unsigned int dummyread, pcicntlval;
 113         int loopCount;
 114         unsigned int pci_config_addr;
 115
 116         pcicvalue = rc32434_pci->pcic;
 117         pcicvalue = (pcicvalue >> PCIM_SHFT) & PCIM_BIT_LEN;
 118         if (!((pcicvalue == PCIM_H_EA) ||
 119               (pcicvalue == PCIM_H_IA_FIX) ||
 120               (pcicvalue == PCIM_H_IA_RR))) {
 121                 pr_err("PCI init error!!!\n");
 122                 /* Not in Host Mode, return ERROR */
 123                 return -1;
 124         }
 125         /* Enables the Idle Grant mode, Arbiter Parking */
 126         pcicdata |= (PCI_CTL_IGM | PCI_CTL_EAP | PCI_CTL_EN);
 127         rc32434_pci->pcic = pcicdata;   /* Enable the PCI bus Interface */
 128         /* Zero out the PCI status & PCI Status Mask */
 129         for (;;) {
 130                 pcicdata = rc32434_pci->pcis;
 131                 if (!(pcicdata & PCI_STAT_RIP))
 132                         break;
 133         }
 134
 135         rc32434_pci->pcis = 0;
 136         rc32434_pci->pcism = 0xFFFFFFFF;
 137         /* Zero out the PCI decoupled registers */
 138         rc32434_pci->pcidac = 0;        /*
 139                                          * disable PCI decoupled accesses at
 140                                          * initialization
 141                                          */
 142         rc32434_pci->pcidas = 0;        /* clear the status */
 143         rc32434_pci->pcidasm = 0x0000007F;      /* Mask all the interrupts */
 144         /* Mask PCI Messaging Interrupts */
 145         rc32434_pci_msg->pciiic = 0;
 146         rc32434_pci_msg->pciiim = 0xFFFFFFFF;
 147         rc32434_pci_msg->pciioic = 0;
 148         rc32434_pci_msg->pciioim = 0;
 149
 150
 151         /* Setup PCILB0 as Memory Window */
 152         rc32434_pci->pcilba[0].address = (unsigned int) (PCI_ADDR_START);
 153
 154         /* setup the PCI map address as same as the local address */
 155
 156         rc32434_pci->pcilba[0].mapping = (unsigned int) (PCI_ADDR_START);
 157
 158
 159         /* Setup PCILBA1 as MEM */
 160         rc32434_pci->pcilba[0].control =
 161             (((SIZE_256MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG);
 162         dummyread = rc32434_pci->pcilba[0].control;     /* flush the CPU write Buffers */
 163         rc32434_pci->pcilba[1].address = 0x60000000;
 164         rc32434_pci->pcilba[1].mapping = 0x60000000;
 165
 166         /* setup PCILBA2 as IO Window */
 167         rc32434_pci->pcilba[1].control =
 168             (((SIZE_256MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG);
 169         dummyread = rc32434_pci->pcilba[1].control;     /* flush the CPU write Buffers */
 170         rc32434_pci->pcilba[2].address = 0x18C00000;
 171         rc32434_pci->pcilba[2].mapping = 0x18FFFFFF;
 172
 173         /* setup PCILBA2 as IO Window */
 174         rc32434_pci->pcilba[2].control =
 175             (((SIZE_4MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG);
 176         dummyread = rc32434_pci->pcilba[2].control;     /* flush the CPU write Buffers */
 177
 178         /* Setup PCILBA3 as IO Window */
 179         rc32434_pci->pcilba[3].address = 0x18800000;
 180         rc32434_pci->pcilba[3].mapping = 0x18800000;
 181         rc32434_pci->pcilba[3].control =
 182             ((((SIZE_1MB & 0x1ff) << PCI_LBAC_SIZE_BIT) | PCI_LBAC_MSI) |
 183              PCI_ENDIAN_FLAG);
 184         dummyread = rc32434_pci->pcilba[3].control;     /* flush the CPU write Buffers */
 185
 186         pci_config_addr = (unsigned int) (0x80000004);
 187         for (loopCount = 0; loopCount < 24; loopCount++) {
 188                 rc32434_pci->pcicfga = pci_config_addr;
 189                 dummyread = rc32434_pci->pcicfga;
 190                 rc32434_pci->pcicfgd = korina_cnfg_regs[loopCount];
 191                 dummyread = rc32434_pci->pcicfgd;
 192                 pci_config_addr += 4;
 193         }
 194         rc32434_pci->pcitc =
 195             (unsigned int) ((PCITC_RTIMER_VAL & 0xff) << PCI_TC_RTIMER_BIT) |
 196             ((PCITC_DTIMER_VAL & 0xff) << PCI_TC_DTIMER_BIT);
 197
 198         pcicntlval = rc32434_pci->pcic;
 199         pcicntlval &= ~PCI_CTL_TNR;
 200         rc32434_pci->pcic = pcicntlval;
 201         pcicntlval = rc32434_pci->pcic;
 202
 203         return 0;
 204 }
 205
 206 static int __init rc32434_pci_init(void)
 207 {
 208         void __iomem *io_map_base;
 209
 210         pr_info("PCI: Initializing PCI\n");
 211
 212         ioport_resource.start = rc32434_res_pci_io1.start;
 213         ioport_resource.end = rc32434_res_pci_io1.end;
 214
 215         rc32434_pcibridge_init();
 216
 217         io_map_base = ioremap(rc32434_res_pci_io1.start,
 218                 rc32434_res_pci_io1.end - rc32434_res_pci_io1.start + 1);
 219
 220         if (!io_map_base)
 221                 return -ENOMEM;
 222
 223         rc32434_controller.io_map_base =
 224                 (unsigned long)io_map_base - rc32434_res_pci_io1.start;
 225
 226         register_pci_controller(&rc32434_controller);
 227         rc32434_sync();
 228
 229         return 0;
 230 }
 231
 232 arch_initcall(rc32434_pci_init);