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/*
* BRIEF MODULE DESCRIPTION
* PCI initialization for IDT EB434 board
*
* Copyright 2004 IDT Inc. (rischelp@idt.com)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/mach-rc32434/rc32434.h>
#include <asm/mach-rc32434/pci.h>
#define PCI_ACCESS_READ 0
#define PCI_ACCESS_WRITE 1
/* define an unsigned array for the PCI registers */
static unsigned int korina_cnfg_regs[25] = {
KORINA_CNFG1, KORINA_CNFG2, KORINA_CNFG3, KORINA_CNFG4,
KORINA_CNFG5, KORINA_CNFG6, KORINA_CNFG7, KORINA_CNFG8,
KORINA_CNFG9, KORINA_CNFG10, KORINA_CNFG11, KORINA_CNFG12,
KORINA_CNFG13, KORINA_CNFG14, KORINA_CNFG15, KORINA_CNFG16,
KORINA_CNFG17, KORINA_CNFG18, KORINA_CNFG19, KORINA_CNFG20,
KORINA_CNFG21, KORINA_CNFG22, KORINA_CNFG23, KORINA_CNFG24
};
static struct resource rc32434_res_pci_mem1;
static struct resource rc32434_res_pci_mem2;
static struct resource rc32434_res_pci_mem1 = {
.name = "PCI MEM1",
.start = 0x50000000,
.end = 0x5FFFFFFF,
.flags = IORESOURCE_MEM,
.parent = &rc32434_res_pci_mem1,
.sibling = NULL,
.child = &rc32434_res_pci_mem2
};
static struct resource rc32434_res_pci_mem2 = {
.name = "PCI Mem2",
.start = 0x60000000,
.end = 0x6FFFFFFF,
.flags = IORESOURCE_MEM,
.parent = &rc32434_res_pci_mem1,
.sibling = NULL,
.child = NULL
};
static struct resource rc32434_res_pci_io1 = {
.name = "PCI I/O1",
.start = 0x18800000,
.end = 0x188FFFFF,
.flags = IORESOURCE_IO,
};
extern struct pci_ops rc32434_pci_ops;
#define PCI_MEM1_START PCI_ADDR_START
#define PCI_MEM1_END (PCI_ADDR_START + CPUTOPCI_MEM_WIN - 1)
#define PCI_MEM2_START (PCI_ADDR_START + CPUTOPCI_MEM_WIN)
#define PCI_MEM2_END (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) - 1)
#define PCI_IO1_START (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN))
#define PCI_IO1_END \
(PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + CPUTOPCI_IO_WIN - 1)
#define PCI_IO2_START \
(PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + CPUTOPCI_IO_WIN)
#define PCI_IO2_END \
(PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + (2 * CPUTOPCI_IO_WIN) - 1)
struct pci_controller rc32434_controller2;
struct pci_controller rc32434_controller = {
.pci_ops = &rc32434_pci_ops,
.mem_resource = &rc32434_res_pci_mem1,
.io_resource = &rc32434_res_pci_io1,
.mem_offset = 0,
.io_offset = 0,
};
#ifdef __MIPSEB__
#define PCI_ENDIAN_FLAG PCILBAC_sb_m
#else
#define PCI_ENDIAN_FLAG 0
#endif
static int __init rc32434_pcibridge_init(void)
{
unsigned int pcicvalue, pcicdata = 0;
unsigned int dummyread, pcicntlval;
int loopCount;
unsigned int pci_config_addr;
pcicvalue = rc32434_pci->pcic;
pcicvalue = (pcicvalue >> PCIM_SHFT) & PCIM_BIT_LEN;
if (!((pcicvalue == PCIM_H_EA) ||
(pcicvalue == PCIM_H_IA_FIX) ||
(pcicvalue == PCIM_H_IA_RR))) {
pr_err(KERN_ERR "PCI init error!!!\n");
/* Not in Host Mode, return ERROR */
return -1;
}
/* Enables the Idle Grant mode, Arbiter Parking */
pcicdata |= (PCI_CTL_IGM | PCI_CTL_EAP | PCI_CTL_EN);
rc32434_pci->pcic = pcicdata; /* Enable the PCI bus Interface */
/* Zero out the PCI status & PCI Status Mask */
for (;;) {
pcicdata = rc32434_pci->pcis;
if (!(pcicdata & PCI_STAT_RIP))
break;
}
rc32434_pci->pcis = 0;
rc32434_pci->pcism = 0xFFFFFFFF;
/* Zero out the PCI decoupled registers */
rc32434_pci->pcidac = 0; /*
* disable PCI decoupled accesses at
* initialization
*/
rc32434_pci->pcidas = 0; /* clear the status */
rc32434_pci->pcidasm = 0x0000007F; /* Mask all the interrupts */
/* Mask PCI Messaging Interrupts */
rc32434_pci_msg->pciiic = 0;
rc32434_pci_msg->pciiim = 0xFFFFFFFF;
rc32434_pci_msg->pciioic = 0;
rc32434_pci_msg->pciioim = 0;
/* Setup PCILB0 as Memory Window */
rc32434_pci->pcilba[0].address = (unsigned int) (PCI_ADDR_START);
/* setup the PCI map address as same as the local address */
rc32434_pci->pcilba[0].mapping = (unsigned int) (PCI_ADDR_START);
/* Setup PCILBA1 as MEM */
rc32434_pci->pcilba[0].control =
(((SIZE_256MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG);
dummyread = rc32434_pci->pcilba[0].control; /* flush the CPU write Buffers */
rc32434_pci->pcilba[1].address = 0x60000000;
rc32434_pci->pcilba[1].mapping = 0x60000000;
/* setup PCILBA2 as IO Window */
rc32434_pci->pcilba[1].control =
(((SIZE_256MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG);
dummyread = rc32434_pci->pcilba[1].control; /* flush the CPU write Buffers */
rc32434_pci->pcilba[2].address = 0x18C00000;
rc32434_pci->pcilba[2].mapping = 0x18FFFFFF;
/* setup PCILBA2 as IO Window */
rc32434_pci->pcilba[2].control =
(((SIZE_4MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG);
dummyread = rc32434_pci->pcilba[2].control; /* flush the CPU write Buffers */
/* Setup PCILBA3 as IO Window */
rc32434_pci->pcilba[3].address = 0x18800000;
rc32434_pci->pcilba[3].mapping = 0x18800000;
rc32434_pci->pcilba[3].control =
((((SIZE_1MB & 0x1ff) << PCI_LBAC_SIZE_BIT) | PCI_LBAC_MSI) |
PCI_ENDIAN_FLAG);
dummyread = rc32434_pci->pcilba[3].control; /* flush the CPU write Buffers */
pci_config_addr = (unsigned int) (0x80000004);
for (loopCount = 0; loopCount < 24; loopCount++) {
rc32434_pci->pcicfga = pci_config_addr;
dummyread = rc32434_pci->pcicfga;
rc32434_pci->pcicfgd = korina_cnfg_regs[loopCount];
dummyread = rc32434_pci->pcicfgd;
pci_config_addr += 4;
}
rc32434_pci->pcitc =
(unsigned int) ((PCITC_RTIMER_VAL & 0xff) << PCI_TC_RTIMER_BIT) |
((PCITC_DTIMER_VAL & 0xff) << PCI_TC_DTIMER_BIT);
pcicntlval = rc32434_pci->pcic;
pcicntlval &= ~PCI_CTL_TNR;
rc32434_pci->pcic = pcicntlval;
pcicntlval = rc32434_pci->pcic;
return 0;
}
static int __init rc32434_pci_init(void)
{
void __iomem *io_map_base;
pr_info("PCI: Initializing PCI\n");
ioport_resource.start = rc32434_res_pci_io1.start;
ioport_resource.end = rc32434_res_pci_io1.end;
rc32434_pcibridge_init();
io_map_base = ioremap(rc32434_res_pci_io1.start,
rc32434_res_pci_io1.end - rc32434_res_pci_io1.start + 1);
if (!io_map_base)
return -ENOMEM;
rc32434_controller.io_map_base =
(unsigned long)io_map_base - rc32434_res_pci_io1.start;
register_pci_controller(&rc32434_controller);
rc32434_sync();
return 0;
}
arch_initcall(rc32434_pci_init);
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