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u-boot/cpu/ixp/pci.c
Wolfgang Denk 53677ef18e Big white-space cleanup. 
This commit gets rid of a huge amount of silly white-space issues.
Especially, all sequences of SPACEs followed by TAB characters get
removed (unless they appear in print statements).

Also remove all embedded "vim:" and "vi:" statements which hide
indentation problems.

Signed-off-by: Wolfgang Denk <wd@denx.de>
2008-05-21 00:14:08 +02:00

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/*
* IXP PCI Init
* (C) Copyright 2004 eslab.whut.edu.cn
* Yue Hu(huyue_whut@yahoo.com.cn), Ligong Xue(lgxue@hotmail.com)
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#ifdef CONFIG_PCI
#include <asm/processor.h>
#include <asm/io.h>
#include <pci.h>
#include <asm/arch/ixp425.h>
#include <asm/arch/ixp425pci.h>
static void non_prefetch_read (unsigned int addr, unsigned int cmd,
unsigned int *data);
static void non_prefetch_write (unsigned int addr, unsigned int cmd,
unsigned int data);
static void configure_pins (void);
static void sys_pci_gpio_clock_config (void);
static void pci_bus_scan (void);
static int pci_device_exists (unsigned int deviceNo);
static void sys_pci_bar_info_get (unsigned int devnum, unsigned int bus,
unsigned int dev, unsigned int func);
static void sys_pci_device_bars_write (void);
static void calc_bars (PciBar * Bars[], unsigned int nBars,
unsigned int startAddr);
#define PCI_MEMORY_BUS 0x00000000
#define PCI_MEMORY_PHY 0x48000000
#define PCI_MEMORY_SIZE 0x04000000
#define PCI_MEM_BUS 0x40000000
#define PCI_MEM_PHY 0x00000000
#define PCI_MEM_SIZE 0x04000000
#define PCI_IO_BUS 0x40000000
#define PCI_IO_PHY 0x50000000
#define PCI_IO_SIZE 0x10000000
struct pci_controller hose;
unsigned int nDevices;
unsigned int nMBars;
unsigned int nIOBars;
PciBar *memBars[IXP425_PCI_MAX_BAR];
PciBar *ioBars[IXP425_PCI_MAX_BAR];
PciDevice devices[IXP425_PCI_MAX_FUNC_ON_BUS];
int pci_read_config_dword (pci_dev_t dev, int where, unsigned int *val)
{
unsigned int retval;
unsigned int addr;
/*address bits 31:28 specify the device 10:8 specify the function */
/*Set the address to be read */
addr = BIT ((31 - dev)) | (where & ~3);
non_prefetch_read (addr, NP_CMD_CONFIGREAD, &retval);
*val = retval;
return (OK);
}
int pci_read_config_word (pci_dev_t dev, int where, unsigned short *val)
{
unsigned int n;
unsigned int retval;
unsigned int addr;
unsigned int byteEnables;
n = where % 4;
/*byte enables are 4 bits active low, the position of each
bit maps to the byte that it enables */
byteEnables =
(~(BIT (n) | BIT ((n + 1)))) &
IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
byteEnables = byteEnables << PCI_NP_CBE_BESL;
/*address bits 31:28 specify the device 10:8 specify the function */
/*Set the address to be read */
addr = BIT ((31 - dev)) | (where & ~3);
non_prefetch_read (addr, byteEnables | NP_CMD_CONFIGREAD, &retval);
/*Pick out the word we are interested in */
*val = (retval >> (8 * n));
return (OK);
}
int pci_read_config_byte (pci_dev_t dev, int where, unsigned char *val)
{
unsigned int retval;
unsigned int n;
unsigned int byteEnables;
unsigned int addr;
n = where % 4;
/*byte enables are 4 bits, active low, the position of each
bit maps to the byte that it enables */
byteEnables = (~BIT (n)) & IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
byteEnables = byteEnables << PCI_NP_CBE_BESL;
/*address bits 31:28 specify the device, 10:8 specify the function */
/*Set the address to be read */
addr = BIT ((31 - dev)) | (where & ~3);
non_prefetch_read (addr, byteEnables | NP_CMD_CONFIGREAD, &retval);
/*Pick out the byte we are interested in */
*val = (retval >> (8 * n));
return (OK);
}
int pci_write_config_byte (pci_dev_t dev, int where, unsigned char val)
{
unsigned int addr;
unsigned int byteEnables;
unsigned int n;
unsigned int ldata;
n = where % 4;
/*byte enables are 4 bits active low, the position of each
bit maps to the byte that it enables */
byteEnables = (~BIT (n)) & IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
byteEnables = byteEnables << PCI_NP_CBE_BESL;
ldata = val << (8 * n);
/*address bits 31:28 specify the device 10:8 specify the function */
/*Set the address to be written */
addr = BIT ((31 - dev)) | (where & ~3);
non_prefetch_write (addr, byteEnables | NP_CMD_CONFIGWRITE, ldata);
return (OK);
}
int pci_write_config_word (pci_dev_t dev, int where, unsigned short val)
{
unsigned int addr;
unsigned int byteEnables;
unsigned int n;
unsigned int ldata;
n = where % 4;
/*byte enables are 4 bits active low, the position of each
bit maps to the byte that it enables */
byteEnables =
(~(BIT (n) | BIT ((n + 1)))) &
IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
byteEnables = byteEnables << PCI_NP_CBE_BESL;
ldata = val << (8 * n);
/*address bits 31:28 specify the device 10:8 specify the function */
/*Set the address to be written */
addr = BIT (31 - dev) | (where & ~3);
non_prefetch_write (addr, byteEnables | NP_CMD_CONFIGWRITE, ldata);
return (OK);
}
int pci_write_config_dword (pci_dev_t dev, int where, unsigned int val)
{
unsigned int addr;
/*address bits 31:28 specify the device 10:8 specify the function */
/*Set the address to be written */
addr = BIT (31 - dev) | (where & ~3);
non_prefetch_write (addr, NP_CMD_CONFIGWRITE, val);
return (OK);
}
void non_prefetch_read (unsigned int addr,
unsigned int cmd, unsigned int *data)
{
REG_WRITE (PCI_CSR_BASE, PCI_NP_AD_OFFSET, addr);
/*set up and execute the read */
REG_WRITE (PCI_CSR_BASE, PCI_NP_CBE_OFFSET, cmd);
/*The result of the read is now in np_rdata */
REG_READ (PCI_CSR_BASE, PCI_NP_RDATA_OFFSET, *data);
return;
}
void non_prefetch_write (unsigned int addr,
unsigned int cmd, unsigned int data)
{
REG_WRITE (PCI_CSR_BASE, PCI_NP_AD_OFFSET, addr);
/*set up the write */
REG_WRITE (PCI_CSR_BASE, PCI_NP_CBE_OFFSET, cmd);
/*Execute the write by writing to NP_WDATA */
REG_WRITE (PCI_CSR_BASE, PCI_NP_WDATA_OFFSET, data);
return;
}
/*
* PCI controller config registers are accessed through these functions
* i.e. these allow us to set up our own BARs etc.
*/
void crp_read (unsigned int offset, unsigned int *data)
{
REG_WRITE (PCI_CSR_BASE, PCI_CRP_AD_CBE_OFFSET, offset);
REG_READ (PCI_CSR_BASE, PCI_CRP_RDATA_OFFSET, *data);
}
void crp_write (unsigned int offset, unsigned int data)
{
/*The CRP address register bit 16 indicates that we want to do a write */
REG_WRITE (PCI_CSR_BASE, PCI_CRP_AD_CBE_OFFSET,
PCI_CRP_WRITE | offset);
REG_WRITE (PCI_CSR_BASE, PCI_CRP_WDATA_OFFSET, data);
}
/*struct pci_controller *hose*/
void pci_ixp_init (struct pci_controller *hose)
{
unsigned int regval;
hose->first_busno = 0;
hose->last_busno = 0x00;
/* System memory space */
pci_set_region (hose->regions + 0,
PCI_MEMORY_BUS,
PCI_MEMORY_PHY, PCI_MEMORY_SIZE, PCI_REGION_MEMORY);
/* PCI memory space */
pci_set_region (hose->regions + 1,
PCI_MEM_BUS,
PCI_MEM_PHY, PCI_MEM_SIZE, PCI_REGION_MEM);
/* PCI I/O space */
pci_set_region (hose->regions + 2,
PCI_IO_BUS, PCI_IO_PHY, PCI_IO_SIZE, PCI_REGION_IO);
hose->region_count = 3;
pci_register_hose (hose);
/*
==========================================================
Init IXP PCI
==========================================================
*/
REG_READ (PCI_CSR_BASE, PCI_CSR_OFFSET, regval);
regval |= 1 << 2;
REG_WRITE (PCI_CSR_BASE, PCI_CSR_OFFSET, regval);
configure_pins ();
READ_GPIO_REG (IXP425_GPIO_GPOUTR, regval);
WRITE_GPIO_REG (IXP425_GPIO_GPOUTR, regval & (~(1 << 13)));
udelay (533);
sys_pci_gpio_clock_config ();
REG_WRITE (PCI_CSR_BASE, PCI_INTEN_OFFSET, 0);
udelay (100);
READ_GPIO_REG (IXP425_GPIO_GPOUTR, regval);
WRITE_GPIO_REG (IXP425_GPIO_GPOUTR, regval | (1 << 13));
udelay (533);
crp_write (PCI_CFG_BASE_ADDRESS_0, IXP425_PCI_BAR_0_DEFAULT);
crp_write (PCI_CFG_BASE_ADDRESS_1, IXP425_PCI_BAR_1_DEFAULT);
crp_write (PCI_CFG_BASE_ADDRESS_2, IXP425_PCI_BAR_2_DEFAULT);
crp_write (PCI_CFG_BASE_ADDRESS_3, IXP425_PCI_BAR_3_DEFAULT);
crp_write (PCI_CFG_BASE_ADDRESS_4, IXP425_PCI_BAR_4_DEFAULT);
crp_write (PCI_CFG_BASE_ADDRESS_5, IXP425_PCI_BAR_5_DEFAULT);
/*Setup PCI-AHB and AHB-PCI address mappings */
REG_WRITE (PCI_CSR_BASE, PCI_AHBMEMBASE_OFFSET,
IXP425_PCI_AHBMEMBASE_DEFAULT);
REG_WRITE (PCI_CSR_BASE, PCI_AHBIOBASE_OFFSET,
IXP425_PCI_AHBIOBASE_DEFAULT);
REG_WRITE (PCI_CSR_BASE, PCI_PCIMEMBASE_OFFSET,
IXP425_PCI_PCIMEMBASE_DEFAULT);
crp_write (PCI_CFG_SUB_VENDOR_ID, IXP425_PCI_SUB_VENDOR_SYSTEM);
REG_READ (PCI_CSR_BASE, PCI_CSR_OFFSET, regval);
regval |= PCI_CSR_IC | PCI_CSR_ABE | PCI_CSR_PDS;
REG_WRITE (PCI_CSR_BASE, PCI_CSR_OFFSET, regval);
crp_write (PCI_CFG_COMMAND, PCI_CFG_CMD_MAE | PCI_CFG_CMD_BME);
udelay (1000);
pci_write_config_word (0, PCI_CFG_COMMAND, INITIAL_PCI_CMD);
REG_WRITE (PCI_CSR_BASE, PCI_ISR_OFFSET, PCI_ISR_PSE
| PCI_ISR_PFE | PCI_ISR_PPE | PCI_ISR_AHBE);
#ifdef CONFIG_PCI_SCAN_SHOW
printf ("Device bus dev func deviceID vendorID \n");
#endif
pci_bus_scan ();
}
void configure_pins (void)
{
unsigned int regval;
/* Disable clock on GPIO PIN 14 */
READ_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
WRITE_GPIO_REG (IXP425_GPIO_GPCLKR, regval & (~(1 << 8)));
READ_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
READ_GPIO_REG (IXP425_GPIO_GPOER, regval);
WRITE_GPIO_REG (IXP425_GPIO_GPOER,
(((~(3 << 13)) & regval) | (0xf << 8)));
READ_GPIO_REG (IXP425_GPIO_GPOER, regval);
READ_GPIO_REG (IXP425_GPIO_GPIT2R, regval);
WRITE_GPIO_REG (IXP425_GPIO_GPIT2R,
(regval &
((0x1 << 9) | (0x1 << 6) | (0x1 << 3) | 0x1)));
READ_GPIO_REG (IXP425_GPIO_GPIT2R, regval);
READ_GPIO_REG (IXP425_GPIO_GPISR, regval);
WRITE_GPIO_REG (IXP425_GPIO_GPISR, (regval | (0xf << 8)));
READ_GPIO_REG (IXP425_GPIO_GPISR, regval);
}
void sys_pci_gpio_clock_config (void)
{
unsigned int regval;
READ_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
regval |= 0x1 << 4;
WRITE_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
READ_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
regval |= 0x1 << 8;
WRITE_GPIO_REG (IXP425_GPIO_GPCLKR, regval);
}
void pci_bus_scan (void)
{
unsigned int bus = 0, dev, func = 0;
unsigned short data16;
unsigned int data32;
unsigned char intPin;
/* Assign first device to ourselves */
devices[0].bus = 0;
devices[0].device = 0;
devices[0].func = 0;
crp_read (PCI_CFG_VENDOR_ID, &data32);
devices[0].vendor_id = data32 & IXP425_PCI_BOTTOM_WORD_OF_LONG_MASK;
devices[0].device_id = data32 >> 16;
devices[0].error = FALSE;
devices[0].bar[NO_BAR].size = 0; /*dummy - required */
nDevices = 1;
nMBars = 0;
nIOBars = 0;
for (dev = 0; dev < IXP425_PCI_MAX_DEV; dev++) {
/*Check whether a device is present */
if (pci_device_exists (dev) != TRUE) {
/*Clear error bits in ISR, write 1 to clear */
REG_WRITE (PCI_CSR_BASE, PCI_ISR_OFFSET, PCI_ISR_PSE
| PCI_ISR_PFE | PCI_ISR_PPE |
PCI_ISR_AHBE);
continue;
}
/*A device is present, add an entry to the array */
devices[nDevices].bus = bus;
devices[nDevices].device = dev;
devices[nDevices].func = func;
pci_read_config_word (dev, PCI_CFG_VENDOR_ID, &data16);
devices[nDevices].vendor_id = data16;
pci_read_config_word (dev, PCI_CFG_DEVICE_ID, &data16);
devices[nDevices].device_id = data16;
/*The device is functioning correctly, set error to FALSE */
devices[nDevices].error = FALSE;
/*Figure out what BARs are on this device */
sys_pci_bar_info_get (nDevices, bus, dev, func);
/*Figure out what INTX# line the card uses */
pci_read_config_byte (dev, PCI_CFG_DEV_INT_PIN, &intPin);
/*assign the appropriate irq line */
if (intPin > PCI_IRQ_LINES) {
devices[nDevices].error = TRUE;
} else if (intPin != 0) {
/*This device uses an interrupt line */
/*devices[nDevices].irq = ixp425PciIntTranslate[dev][intPin-1]; */
devices[nDevices].irq = intPin;
}
#ifdef CONFIG_PCI_SCAN_SHOW
printf ("%06d %03d %03d %04d %08d %08x\n", nDevices,
devices[nDevices].vendor_id);
#endif
nDevices++;
}
calc_bars (memBars, nMBars, IXP425_PCI_BAR_MEM_BASE);
sys_pci_device_bars_write ();
REG_WRITE (PCI_CSR_BASE, PCI_ISR_OFFSET, PCI_ISR_PSE
| PCI_ISR_PFE | PCI_ISR_PPE | PCI_ISR_AHBE);
}
void sys_pci_bar_info_get (unsigned int devnum,
unsigned int bus,
unsigned int dev, unsigned int func)
{
unsigned int data32;
unsigned int tmp;
unsigned int size;
pci_write_config_dword (devnum,
PCI_CFG_BASE_ADDRESS_0, IXP425_PCI_BAR_QUERY);
pci_read_config_dword (devnum, PCI_CFG_BASE_ADDRESS_0, &data32);
devices[devnum].bar[0].address = (data32 & 1);
if (data32 & 1) {
/* IO space */
tmp = data32 & ~0x3;
size = ~(tmp - 1);
devices[devnum].bar[0].size = size;
if (nIOBars < IXP425_PCI_MAX_BAR) {
ioBars[nIOBars++] = &devices[devnum].bar[0];
}
} else {
/* Mem space */
tmp = data32 & ~IXP425_PCI_BOTTOM_NIBBLE_OF_LONG_MASK;
size = ~(tmp - 1);
devices[devnum].bar[0].size = size;
if (nMBars < IXP425_PCI_MAX_BAR) {
memBars[nMBars++] = &devices[devnum].bar[0];
} else {
devices[devnum].error = TRUE;
}
}
devices[devnum].bar[1].size = 0;
}
void sortBars (PciBar * Bars[], unsigned int nBars)
{
unsigned int i, j;
PciBar *tmp;
if (nBars == 0) {
return;
}
/* Sort biggest to smallest */
for (i = 0; i < nBars - 1; i++) {
for (j = i + 1; j < nBars; j++) {
if (Bars[j]->size > Bars[i]->size) {
/* swap them */
tmp = Bars[i];
Bars[i] = Bars[j];
Bars[j] = tmp;
}
}
}
}
void calc_bars (PciBar * Bars[], unsigned int nBars, unsigned int startAddr)
{
unsigned int i;
if (nBars == 0) {
return;
}
for (i = 0; i < nBars; i++) {
Bars[i]->address |= startAddr;
startAddr += Bars[i]->size;
}
}
void sys_pci_device_bars_write (void)
{
unsigned int i;
int addr;
for (i = 1; i < nDevices; i++) {
if (devices[i].error) {
continue;
}
pci_write_config_dword (devices[i].device,
PCI_CFG_BASE_ADDRESS_0,
devices[i].bar[0].address);
addr = BIT (31 - devices[i].device) |
(0 << PCI_NP_AD_FUNCSL) |
(PCI_CFG_BASE_ADDRESS_0 & ~3);
pci_write_config_dword (devices[i].device,
PCI_CFG_DEV_INT_LINE, devices[i].irq);
pci_write_config_word (devices[i].device,
PCI_CFG_COMMAND, INITIAL_PCI_CMD);
}
}
int pci_device_exists (unsigned int deviceNo)
{
unsigned int vendorId;
unsigned int regval;
pci_read_config_dword (deviceNo, PCI_CFG_VENDOR_ID, &vendorId);
/* There are two ways to find out an empty device.
* 1. check Master Abort bit after the access.
* 2. check whether the vendor id read back is 0x0.
*/
REG_READ (PCI_CSR_BASE, PCI_ISR_OFFSET, regval);
if ((vendorId != 0x0) && ((regval & PCI_ISR_PFE) == 0)) {
return TRUE;
}
/*no device present, make sure that the master abort bit is reset */
REG_WRITE (PCI_CSR_BASE, PCI_ISR_OFFSET, PCI_ISR_PFE);
return FALSE;
}
pci_dev_t pci_find_devices (struct pci_device_id * ids, int devNo)
{
unsigned int i;
unsigned int devdidvid;
unsigned int didvid;
unsigned int vendorId, deviceId;
vendorId = ids->vendor;
deviceId = ids->device;
didvid = ((deviceId << 16) & IXP425_PCI_TOP_WORD_OF_LONG_MASK) |
(vendorId & IXP425_PCI_BOTTOM_WORD_OF_LONG_MASK);
for (i = devNo + 1; i < nDevices; i++) {
pci_read_config_dword (devices[i].device, PCI_CFG_VENDOR_ID,
&devdidvid);
if (devdidvid == didvid) {
return devices[i].device;
}
}
return -1;
}
#endif /* CONFIG_PCI */
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