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/*
* arch/ppc/boot/spruce/misc.c
*
* Misc. bootloader code for IBM Spruce reference platform
*
* Authors: Johnnie Peters <jpeters@mvista.com>
* Matt Porter <mporter@mvista.com>
*
* Derived from arch/ppc/boot/prep/misc.c
*
* 2000-2001 (c) MontaVista, Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <linux/types.h>
#include <linux/config.h>
#include <linux/pci.h>
#include <asm/bootinfo.h>
extern unsigned long decompress_kernel(unsigned long load_addr, int num_words,
unsigned long cksum);
/* Define some important locations of the Spruce. */
#define SPRUCE_PCI_CONFIG_ADDR 0xfec00000
#define SPRUCE_PCI_CONFIG_DATA 0xfec00004
/* PCI configuration space access routines. */
unsigned int *pci_config_address = (unsigned int *)SPRUCE_PCI_CONFIG_ADDR;
unsigned char *pci_config_data = (unsigned char *)SPRUCE_PCI_CONFIG_DATA;
void cpc700_pcibios_read_config_byte(unsigned char bus, unsigned char dev_fn,
unsigned char offset, unsigned char *val)
{
out_le32(pci_config_address,
(((bus & 0xff)<<16) | (dev_fn<<8) | (offset&0xfc) | 0x80000000));
*val= (in_le32((unsigned *)pci_config_data) >> (8 * (offset & 3))) & 0xff;
}
void cpc700_pcibios_write_config_byte(unsigned char bus, unsigned char dev_fn,
unsigned char offset, unsigned char val)
{
out_le32(pci_config_address,
(((bus & 0xff)<<16) | (dev_fn<<8) | (offset&0xfc) | 0x80000000));
out_8(pci_config_data + (offset&3), val);
}
void cpc700_pcibios_read_config_word(unsigned char bus, unsigned char dev_fn,
unsigned char offset, unsigned short *val)
{
out_le32(pci_config_address,
(((bus & 0xff)<<16) | (dev_fn<<8) | (offset&0xfc) | 0x80000000));
*val= in_le16((unsigned short *)(pci_config_data + (offset&3)));
}
void cpc700_pcibios_write_config_word(unsigned char bus, unsigned char dev_fn,
unsigned char offset, unsigned short val)
{
out_le32(pci_config_address,
(((bus & 0xff)<<16) | (dev_fn<<8) | (offset&0xfc) | 0x80000000));
out_le16((unsigned short *)(pci_config_data + (offset&3)), val);
}
void cpc700_pcibios_read_config_dword(unsigned char bus, unsigned char dev_fn,
unsigned char offset, unsigned int *val)
{
out_le32(pci_config_address,
(((bus & 0xff)<<16) | (dev_fn<<8) | (offset&0xfc) | 0x80000000));
*val= in_le32((unsigned *)pci_config_data);
}
void cpc700_pcibios_write_config_dword(unsigned char bus, unsigned char dev_fn,
unsigned char offset, unsigned int val)
{
out_le32(pci_config_address,
(((bus & 0xff)<<16) | (dev_fn<<8) | (offset&0xfc) | 0x80000000));
out_le32((unsigned *)pci_config_data, val);
}
#define PCNET32_WIO_RDP 0x10
#define PCNET32_WIO_RAP 0x12
#define PCNET32_WIO_RESET 0x14
#define PCNET32_DWIO_RDP 0x10
#define PCNET32_DWIO_RAP 0x14
#define PCNET32_DWIO_RESET 0x18
/* Processor interface config register access */
#define PIFCFGADDR 0xff500000
#define PIFCFGDATA 0xff500004
#define PLBMIFOPT 0x18 /* PLB Master Interface Options */
#define MEM_MBEN 0x24
#define MEM_TYPE 0x28
#define MEM_B1SA 0x3c
#define MEM_B1EA 0x5c
#define MEM_B2SA 0x40
#define MEM_B2EA 0x60
unsigned long
get_mem_size(void)
{
int loop;
unsigned long mem_size = 0;
unsigned long mem_mben;
unsigned long mem_type;
unsigned long mem_start;
unsigned long mem_end;
volatile int *mem_addr = (int *)0xff500008;
volatile int *mem_data = (int *)0xff50000c;
/* Get the size of memory from the memory controller. */
*mem_addr = MEM_MBEN;
asm("sync");
mem_mben = *mem_data;
asm("sync");
for(loop = 0; loop < 1000; loop++);
*mem_addr = MEM_TYPE;
asm("sync");
mem_type = *mem_data;
asm("sync");
for(loop = 0; loop < 1000; loop++);
*mem_addr = MEM_TYPE;
/* Confirm bank 1 has DRAM memory */
if ((mem_mben & 0x40000000) &&
((mem_type & 0x30000000) == 0x10000000)) {
*mem_addr = MEM_B1SA;
asm("sync");
mem_start = *mem_data;
asm("sync");
for(loop = 0; loop < 1000; loop++);
*mem_addr = MEM_B1EA;
asm("sync");
mem_end = *mem_data;
asm("sync");
for(loop = 0; loop < 1000; loop++);
mem_size = mem_end - mem_start + 0x100000;
}
/* Confirm bank 2 has DRAM memory */
if ((mem_mben & 0x20000000) &&
((mem_type & 0xc000000) == 0x4000000)) {
*mem_addr = MEM_B2SA;
asm("sync");
mem_start = *mem_data;
asm("sync");
for(loop = 0; loop < 1000; loop++);
*mem_addr = MEM_B2EA;
asm("sync");
mem_end = *mem_data;
asm("sync");
for(loop = 0; loop < 1000; loop++);
mem_size += mem_end - mem_start + 0x100000;
}
return mem_size;
}
unsigned long
load_kernel(unsigned long load_addr, int num_words, unsigned long cksum,
void *ign1, void *ign2)
{
int csr0;
int csr_id;
int pci_devfn;
int found_multi = 0;
unsigned short vendor;
unsigned short device;
unsigned short command;
unsigned char header_type;
unsigned int bar0;
volatile int *pif_addr = (int *)0xff500000;
volatile int *pif_data = (int *)0xff500004;
/*
* Gah, these firmware guys need to learn that hardware
* byte swapping is evil! Disable all hardware byte
* swapping so it doesn't hurt anyone.
*/
*pif_addr = PLBMIFOPT;
asm("sync");
*pif_data = 0x00000000;
asm("sync");
/* Search out and turn off the PcNet ethernet boot device. */
for (pci_devfn = 1; pci_devfn < 0xff; pci_devfn++) {
if (PCI_FUNC(pci_devfn) && !found_multi)
continue;
cpc700_pcibios_read_config_byte(0, pci_devfn,
PCI_HEADER_TYPE, &header_type);
if (!PCI_FUNC(pci_devfn))
found_multi = header_type & 0x80;
cpc700_pcibios_read_config_word(0, pci_devfn, PCI_VENDOR_ID,
&vendor);
if (vendor != 0xffff) {
cpc700_pcibios_read_config_word(0, pci_devfn,
PCI_DEVICE_ID, &device);
/* If this PCI device is the Lance PCNet board then turn it off */
if ((vendor == PCI_VENDOR_ID_AMD) &&
(device == PCI_DEVICE_ID_AMD_LANCE)) {
/* Turn on I/O Space on the board. */
cpc700_pcibios_read_config_word(0, pci_devfn,
PCI_COMMAND, &command);
command |= 0x1;
cpc700_pcibios_write_config_word(0, pci_devfn,
PCI_COMMAND, command);
/* Get the I/O space address */
cpc700_pcibios_read_config_dword(0, pci_devfn,
PCI_BASE_ADDRESS_0, &bar0);
bar0 &= 0xfffffffe;
/* Reset the PCNet Board */
inl (bar0+PCNET32_DWIO_RESET);
inw (bar0+PCNET32_WIO_RESET);
/* First do a work oriented read of csr0. If the value is
* 4 then this is the correct mode to access the board.
* If not try a double word ortiented read.
*/
outw(0, bar0 + PCNET32_WIO_RAP);
csr0 = inw(bar0 + PCNET32_WIO_RDP);
if (csr0 == 4) {
/* Check the Chip id register */
outw(88, bar0 + PCNET32_WIO_RAP);
csr_id = inw(bar0 + PCNET32_WIO_RDP);
if (csr_id) {
/* This is the valid mode - set the stop bit */
outw(0, bar0 + PCNET32_WIO_RAP);
outw(csr0, bar0 + PCNET32_WIO_RDP);
}
} else {
outl(0, bar0 + PCNET32_DWIO_RAP);
csr0 = inl(bar0 + PCNET32_DWIO_RDP);
if (csr0 == 4) {
/* Check the Chip id register */
outl(88, bar0 + PCNET32_WIO_RAP);
csr_id = inl(bar0 + PCNET32_WIO_RDP);
if (csr_id) {
/* This is the valid mode - set the stop bit*/
outl(0, bar0 + PCNET32_WIO_RAP);
outl(csr0, bar0 + PCNET32_WIO_RDP);
}
}
}
}
}
}
return decompress_kernel(load_addr, num_words, cksum);
}
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