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/*
* Faraday FTPCI100 PCI Bridge Controller Device Driver Implementation
*
* Copyright (C) 2011 Andes Technology Corporation
* Gavin Guo, Andes Technology Corporation <gavinguo@andestech.com>
* Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <malloc.h>
#include <pci.h>
#include <faraday/ftpci100.h>
#include <asm/io.h>
#include <asm/types.h> /* u32, u16.... used by pci.h */
struct ftpci100_data {
unsigned int reg_base;
unsigned int io_base;
unsigned int mem_base;
unsigned int mmio_base;
unsigned int ndevs;
};
static struct pci_config devs[FTPCI100_MAX_FUNCTIONS];
static struct pci_controller local_hose;
static void setup_pci_bar(unsigned int bus, unsigned int dev, unsigned func,
unsigned char header, struct ftpci100_data *priv)
{
struct pci_controller *hose = (struct pci_controller *)&local_hose;
unsigned int i, tmp32, bar_no, iovsmem = 1;
pci_dev_t dev_nu;
/* A device is present, add an entry to the array */
devs[priv->ndevs].bus = bus;
devs[priv->ndevs].dev = dev;
devs[priv->ndevs].func = func;
dev_nu = PCI_BDF(bus, dev, func);
if ((header & 0x7f) == 0x01)
/* PCI-PCI Bridge */
bar_no = 2;
else
bar_no = 6;
/* Allocate address spaces by configuring BARs */
for (i = 0; i < bar_no; i++) {
pci_hose_write_config_dword(hose, dev_nu,
PCI_BASE_ADDRESS_0 + i * 4, 0xffffffff);
pci_hose_read_config_dword(hose, dev_nu,
PCI_BASE_ADDRESS_0 + i * 4, &tmp32);
if (tmp32 == 0x0)
continue;
/* IO space */
if (tmp32 & 0x1) {
iovsmem = 0;
unsigned int size_mask = ~(tmp32 & 0xfffffffc);
if (priv->io_base & size_mask)
priv->io_base = (priv->io_base & ~size_mask) + \
size_mask + 1;
devs[priv->ndevs].bar[i].addr = priv->io_base;
devs[priv->ndevs].bar[i].size = size_mask + 1;
pci_hose_write_config_dword(hose, dev_nu,
PCI_BASE_ADDRESS_0 + i * 4,
priv->io_base);
debug("Allocated IO address 0x%X-" \
"0x%X for Bus %d, Device %d, Function %d\n",
priv->io_base,
priv->io_base + size_mask, bus, dev, func);
priv->io_base += size_mask + 1;
} else {
/* Memory space */
unsigned int is_64bit = ((tmp32 & 0x6) == 0x4);
unsigned int is_pref = tmp32 & 0x8;
unsigned int size_mask = ~(tmp32 & 0xfffffff0);
unsigned int alloc_base;
unsigned int *addr_mem_base;
if (is_pref)
addr_mem_base = &priv->mem_base;
else
addr_mem_base = &priv->mmio_base;
alloc_base = *addr_mem_base;
if (alloc_base & size_mask)
alloc_base = (alloc_base & ~size_mask) \
+ size_mask + 1;
pci_hose_write_config_dword(hose, dev_nu,
PCI_BASE_ADDRESS_0 + i * 4, alloc_base);
debug("Allocated %s address 0x%X-" \
"0x%X for Bus %d, Device %d, Function %d\n",
is_pref ? "MEM" : "MMIO", alloc_base,
alloc_base + size_mask, bus, dev, func);
devs[priv->ndevs].bar[i].addr = alloc_base;
devs[priv->ndevs].bar[i].size = size_mask + 1;
debug("BAR address BAR size\n");
debug("%010x %08d\n",
devs[priv->ndevs].bar[0].addr,
devs[priv->ndevs].bar[0].size);
alloc_base += size_mask + 1;
*addr_mem_base = alloc_base;
if (is_64bit) {
i++;
pci_hose_write_config_dword(hose, dev_nu,
PCI_BASE_ADDRESS_0 + i * 4, 0x0);
}
}
}
/* Enable Bus Master, Memory Space, and IO Space */
pci_hose_read_config_dword(hose, dev_nu, PCI_CACHE_LINE_SIZE, &tmp32);
pci_hose_write_config_dword(hose, dev_nu, PCI_CACHE_LINE_SIZE, 0x08);
pci_hose_read_config_dword(hose, dev_nu, PCI_CACHE_LINE_SIZE, &tmp32);
pci_hose_read_config_dword(hose, dev_nu, PCI_COMMAND, &tmp32);
tmp32 &= 0xffff;
if (iovsmem == 0)
tmp32 |= 0x5;
else
tmp32 |= 0x6;
pci_hose_write_config_dword(hose, dev_nu, PCI_COMMAND, tmp32);
}
static void pci_bus_scan(struct ftpci100_data *priv)
{
struct pci_controller *hose = (struct pci_controller *)&local_hose;
unsigned int bus, dev, func;
pci_dev_t dev_nu;
unsigned int data32;
unsigned int tmp;
unsigned char header;
unsigned char int_pin;
unsigned int niobars;
unsigned int nmbars;
priv->ndevs = 1;
nmbars = 0;
niobars = 0;
for (bus = 0; bus < MAX_BUS_NUM; bus++)
for (dev = 0; dev < MAX_DEV_NUM; dev++)
for (func = 0; func < MAX_FUN_NUM; func++) {
dev_nu = PCI_BDF(bus, dev, func);
pci_hose_read_config_dword(hose, dev_nu,
PCI_VENDOR_ID, &data32);
/*
* some broken boards return 0 or ~0,
* if a slot is empty.
*/
if (data32 == 0xffffffff ||
data32 == 0x00000000 ||
data32 == 0x0000ffff ||
data32 == 0xffff0000)
continue;
pci_hose_read_config_dword(hose, dev_nu,
PCI_HEADER_TYPE, &tmp);
header = (unsigned char)tmp;
setup_pci_bar(bus, dev, func, header, priv);
devs[priv->ndevs].v_id = (u16)(data32 & \
0x0000ffff);
devs[priv->ndevs].d_id = (u16)((data32 & \
0xffff0000) >> 16);
/* Figure out what INTX# line the card uses */
pci_hose_read_config_byte(hose, dev_nu,
PCI_INTERRUPT_PIN, &int_pin);
/* assign the appropriate irq line */
if (int_pin > PCI_IRQ_LINES) {
printf("more irq lines than expect\n");
} else if (int_pin != 0) {
/* This device uses an interrupt line */
devs[priv->ndevs].pin = int_pin;
}
pci_hose_read_config_dword(hose, dev_nu,
PCI_CLASS_DEVICE, &data32);
debug("%06d %03d %03d " \
"%04d %08x %08x " \
"%03d %08x %06d %08x\n",
priv->ndevs, devs[priv->ndevs].bus,
devs[priv->ndevs].dev,
devs[priv->ndevs].func,
devs[priv->ndevs].d_id,
devs[priv->ndevs].v_id,
devs[priv->ndevs].pin,
devs[priv->ndevs].bar[0].addr,
devs[priv->ndevs].bar[0].size,
data32 >> 8);
priv->ndevs++;
}
}
static void ftpci_preinit(struct ftpci100_data *priv)
{
struct ftpci100_ahbc *ftpci100;
struct pci_controller *hose = (struct pci_controller *)&local_hose;
u32 pci_config_addr;
u32 pci_config_data;
priv->reg_base = CONFIG_FTPCI100_BASE;
priv->io_base = CONFIG_FTPCI100_BASE + CONFIG_FTPCI100_IO_SIZE;
priv->mmio_base = CONFIG_FTPCI100_MEM_BASE;
priv->mem_base = CONFIG_FTPCI100_MEM_BASE + CONFIG_FTPCI100_MEM_SIZE;
ftpci100 = (struct ftpci100_ahbc *)priv->reg_base;
pci_config_addr = (u32) &ftpci100->conf;
pci_config_data = (u32) &ftpci100->data;
/* print device name */
printf("FTPCI100\n");
/* dump basic configuration */
debug("%s: Config addr is %08X, data port is %08X\n",
__func__, pci_config_addr, pci_config_data);
/* PCI memory space */
pci_set_region(hose->regions + 0,
CONFIG_PCI_MEM_BUS,
CONFIG_PCI_MEM_PHYS,
CONFIG_PCI_MEM_SIZE,
PCI_REGION_MEM);
hose->region_count++;
/* PCI IO space */
pci_set_region(hose->regions + 1,
CONFIG_PCI_IO_BUS,
CONFIG_PCI_IO_PHYS,
CONFIG_PCI_IO_SIZE,
PCI_REGION_IO);
hose->region_count++;
#if defined(CONFIG_PCI_SYS_BUS)
/* PCI System Memory space */
pci_set_region(hose->regions + 2,
CONFIG_PCI_SYS_BUS,
CONFIG_PCI_SYS_PHYS,
CONFIG_PCI_SYS_SIZE,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
hose->region_count++;
#endif
/* setup indirect read/write function */
pci_setup_indirect(hose, pci_config_addr, pci_config_data);
/* register hose */
pci_register_hose(hose);
}
void pci_ftpci_init(void)
{
struct ftpci100_data *priv = NULL;
struct pci_controller *hose = (struct pci_controller *)&local_hose;
pci_dev_t bridge_num;
struct pci_device_id bridge_ids[] = {
{FTPCI100_BRIDGE_VENDORID, FTPCI100_BRIDGE_DEVICEID},
{0, 0}
};
priv = malloc(sizeof(struct ftpci100_data));
if (!priv) {
printf("%s(): failed to malloc priv\n", __func__);
return;
}
memset(priv, 0, sizeof(struct ftpci100_data));
ftpci_preinit(priv);
debug("Device bus dev func deviceID vendorID pin address" \
" size class\n");
pci_bus_scan(priv);
/*
* Setup the PCI Bridge Window to 1GB,
* it will cause USB OHCI Host controller Unrecoverable Error
* if it is not set.
*/
bridge_num = pci_find_devices(bridge_ids, 0);
if (bridge_num == -1) {
printf("PCI Bridge not found\n");
return;
}
pci_hose_write_config_dword(hose, bridge_num, PCI_MEM_BASE_SIZE1,
FTPCI100_BASE_ADR_SIZE(1024));
}
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