upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/drivers/pci/fsl_pci_init.c

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/*
* Copyright 2007 Freescale Semiconductor, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* Version 2 as published by the Free Software Foundation.
*
* 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>
DECLARE_GLOBAL_DATA_PTR;
/*
* PCI/PCIE Controller initialization for mpc85xx/mpc86xx soc's
*
* Initialize controller and call the common driver/pci pci_hose_scan to
* scan for bridges and devices.
*
* Hose fields which need to be pre-initialized by board specific code:
* regions[]
* first_busno
*
* Fields updated:
* last_busno
*/
#include <pci.h>
#include <asm/fsl_pci.h>
/* Freescale-specific PCI config registers */
#define FSL_PCI_PBFR 0x44
#define FSL_PCIE_CAP_ID 0x4c
#define FSL_PCIE_CFG_RDY 0x4b0
void pciauto_prescan_setup_bridge(struct pci_controller *hose,
pci_dev_t dev, int sub_bus);
void pciauto_postscan_setup_bridge(struct pci_controller *hose,
pci_dev_t dev, int sub_bus);
void pciauto_config_init(struct pci_controller *hose);
#ifndef CONFIG_SYS_PCI_MEMORY_BUS
#define CONFIG_SYS_PCI_MEMORY_BUS 0
#endif
#ifndef CONFIG_SYS_PCI_MEMORY_PHYS
#define CONFIG_SYS_PCI_MEMORY_PHYS 0
#endif
#if defined(CONFIG_SYS_PCI_64BIT) && !defined(CONFIG_SYS_PCI64_MEMORY_BUS)
#define CONFIG_SYS_PCI64_MEMORY_BUS (64ull*1024*1024*1024)
#endif
int fsl_pci_setup_inbound_windows(struct pci_region *r)
{
struct pci_region *rgn_base = r;
u64 sz = min((u64)gd->ram_size, (1ull << 32) - 1);
phys_addr_t phys_start = CONFIG_SYS_PCI_MEMORY_PHYS;
pci_addr_t bus_start = CONFIG_SYS_PCI_MEMORY_BUS;
pci_size_t pci_sz = 1ull << __ilog2_u64(sz);
debug ("R0 bus_start: %llx phys_start: %llx size: %llx\n",
(u64)bus_start, (u64)phys_start, (u64)pci_sz);
pci_set_region(r++, bus_start, phys_start, pci_sz,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
PCI_REGION_PREFETCH);
sz -= pci_sz;
bus_start += pci_sz;
phys_start += pci_sz;
pci_sz = 1ull << __ilog2_u64(sz);
if (sz) {
debug ("R1 bus_start: %llx phys_start: %llx size: %llx\n",
(u64)bus_start, (u64)phys_start, (u64)pci_sz);
pci_set_region(r++, bus_start, phys_start, pci_sz,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
PCI_REGION_PREFETCH);
sz -= pci_sz;
bus_start += pci_sz;
phys_start += pci_sz;
}
#if defined(CONFIG_PHYS_64BIT) && defined(CONFIG_SYS_PCI_64BIT)
/*
* On 64-bit capable systems, set up a mapping for all of DRAM
* in high pci address space.
*/
pci_sz = 1ull << __ilog2_u64(gd->ram_size);
/* round up to the next largest power of two */
if (gd->ram_size > pci_sz)
pci_sz = 1ull << (__ilog2_u64(gd->ram_size) + 1);
debug ("R64 bus_start: %llx phys_start: %llx size: %llx\n",
(u64)CONFIG_SYS_PCI64_MEMORY_BUS,
(u64)CONFIG_SYS_PCI_MEMORY_PHYS,
(u64)pci_sz);
pci_set_region(r++,
CONFIG_SYS_PCI64_MEMORY_BUS,
CONFIG_SYS_PCI_MEMORY_PHYS,
pci_sz,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
PCI_REGION_PREFETCH);
#else
pci_sz = 1ull << __ilog2_u64(sz);
if (sz) {
debug ("R2 bus_start: %llx phys_start: %llx size: %llx\n",
(u64)bus_start, (u64)phys_start, (u64)pci_sz);
pci_set_region(r++, bus_start, phys_start, pci_sz,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY |
PCI_REGION_PREFETCH);
sz -= pci_sz;
bus_start += pci_sz;
phys_start += pci_sz;
}
#endif
#ifdef CONFIG_PHYS_64BIT
if (sz && (((u64)gd->ram_size) < (1ull << 32)))
printf("Was not able to map all of memory via "
"inbound windows -- %lld remaining\n", sz);
#endif
return r - rgn_base;
}
void fsl_pci_init(struct pci_controller *hose)
{
u16 temp16;
u32 temp32;
int busno = hose->first_busno;
int enabled;
u16 ltssm;
u8 temp8;
int r;
int bridge;
int inbound = 0;
volatile ccsr_fsl_pci_t *pci = (ccsr_fsl_pci_t *) hose->cfg_addr;
pci_dev_t dev = PCI_BDF(busno,0,0);
/* Initialize ATMU registers based on hose regions and flags */
volatile pot_t *po = &pci->pot[1]; /* skip 0 */
volatile pit_t *pi = &pci->pit[0]; /* ranges from: 3 to 1 */
#ifdef DEBUG
int neg_link_w;
#endif
for (r=0; r<hose->region_count; r++) {
u32 sz = (__ilog2_u64((u64)hose->regions[r].size) - 1);
if (hose->regions[r].flags & PCI_REGION_SYS_MEMORY) { /* inbound */
u32 flag = PIWAR_EN | PIWAR_LOCAL |
PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP;
pi->pitar = (hose->regions[r].phys_start >> 12);
pi->piwbar = (hose->regions[r].bus_start >> 12);
#ifdef CONFIG_SYS_PCI_64BIT
pi->piwbear = (hose->regions[r].bus_start >> 44);
#else
pi->piwbear = 0;
#endif
if (hose->regions[r].flags & PCI_REGION_PREFETCH)
flag |= PIWAR_PF;
pi->piwar = flag | sz;
pi++;
inbound = hose->regions[r].size > 0;
} else { /* Outbound */
po->powbar = (hose->regions[r].phys_start >> 12);
po->potar = (hose->regions[r].bus_start >> 12);
#ifdef CONFIG_SYS_PCI_64BIT
po->potear = (hose->regions[r].bus_start >> 44);
#else
po->potear = 0;
#endif
if (hose->regions[r].flags & PCI_REGION_IO)
po->powar = POWAR_EN | sz |
POWAR_IO_READ | POWAR_IO_WRITE;
else
po->powar = POWAR_EN | sz |
POWAR_MEM_READ | POWAR_MEM_WRITE;
po++;
}
}
pci_register_hose(hose);
pciauto_config_init(hose); /* grab pci_{mem,prefetch,io} */
hose->current_busno = hose->first_busno;
pci->pedr = 0xffffffff; /* Clear any errors */
pci->peer = ~0x20140; /* Enable All Error Interupts except
* - Master abort (pci)
* - Master PERR (pci)
* - ICCA (PCIe)
*/
pci_hose_read_config_dword (hose, dev, PCI_DCR, &temp32);
temp32 |= 0xf000e; /* set URR, FER, NFER (but not CER) */
pci_hose_write_config_dword(hose, dev, PCI_DCR, temp32);
pci_hose_read_config_byte (hose, dev, PCI_HEADER_TYPE, &temp8);
bridge = temp8 & PCI_HEADER_TYPE_BRIDGE; /* Bridge, such as pcie */
if ( bridge ) {
pci_hose_read_config_word(hose, dev, PCI_LTSSM, &ltssm);
enabled = ltssm >= PCI_LTSSM_L0;
#ifdef CONFIG_FSL_PCIE_RESET
if (ltssm == 1) {
int i;
debug("....PCIe link error. "
"LTSSM=0x%02x.", ltssm);
pci->pdb_stat |= 0x08000000; /* assert PCIe reset */
temp32 = pci->pdb_stat;
udelay(100);
debug(" Asserting PCIe reset @%x = %x\n",
&pci->pdb_stat, pci->pdb_stat);
pci->pdb_stat &= ~0x08000000; /* clear reset */
asm("sync;isync");
for (i=0; i<100 && ltssm < PCI_LTSSM_L0; i++) {
pci_hose_read_config_word(hose, dev, PCI_LTSSM,
&ltssm);
udelay(1000);
debug("....PCIe link error. "
"LTSSM=0x%02x.\n", ltssm);
}
enabled = ltssm >= PCI_LTSSM_L0;
}
#endif
if (!enabled) {
debug("....PCIE link error. Skipping scan."
"LTSSM=0x%02x\n", ltssm);
hose->last_busno = hose->first_busno;
return;
}
pci->pme_msg_det = 0xffffffff;
pci->pme_msg_int_en = 0xffffffff;
#ifdef DEBUG
pci_hose_read_config_word(hose, dev, PCI_LSR, &temp16);
neg_link_w = (temp16 & 0x3f0 ) >> 4;
printf("...PCIE LTSSM=0x%x, Negotiated link width=%d\n",
ltssm, neg_link_w);
#endif
hose->current_busno++; /* Start scan with secondary */
pciauto_prescan_setup_bridge(hose, dev, hose->current_busno);
}
/* Use generic setup_device to initialize standard pci regs,
* but do not allocate any windows since any BAR found (such
* as PCSRBAR) is not in this cpu's memory space.
*/
pciauto_setup_device(hose, dev, 0, hose->pci_mem,
hose->pci_prefetch, hose->pci_io);
if (inbound) {
pci_hose_read_config_word(hose, dev, PCI_COMMAND, &temp16);
pci_hose_write_config_word(hose, dev, PCI_COMMAND,
temp16 | PCI_COMMAND_MEMORY);
}
#ifndef CONFIG_PCI_NOSCAN
pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &temp8);
/* Programming Interface (PCI_CLASS_PROG)
* 0 == pci host or pcie root-complex,
* 1 == pci agent or pcie end-point
*/
if (!temp8) {
printf(" Scanning PCI bus %02x\n",
hose->current_busno);
hose->last_busno = pci_hose_scan_bus(hose, hose->current_busno);
} else {
debug(" Not scanning PCI bus %02x. PI=%x\n",
hose->current_busno, temp8);
hose->last_busno = hose->current_busno;
}
if ( bridge ) { /* update limit regs and subordinate busno */
pciauto_postscan_setup_bridge(hose, dev, hose->last_busno);
}
#else
hose->last_busno = hose->current_busno;
#endif
/* Clear all error indications */
if (bridge)
pci->pme_msg_det = 0xffffffff;
pci->pedr = 0xffffffff;
pci_hose_read_config_word (hose, dev, PCI_DSR, &temp16);
if (temp16) {
pci_hose_write_config_word(hose, dev,
PCI_DSR, 0xffff);
}
pci_hose_read_config_word (hose, dev, PCI_SEC_STATUS, &temp16);
if (temp16) {
pci_hose_write_config_word(hose, dev, PCI_SEC_STATUS, 0xffff);
}
}
/* Enable inbound PCI config cycles for agent/endpoint interface */
void fsl_pci_config_unlock(struct pci_controller *hose)
{
pci_dev_t dev = PCI_BDF(hose->first_busno,0,0);
u8 agent;
u8 pcie_cap;
u16 pbfr;
pci_hose_read_config_byte(hose, dev, PCI_CLASS_PROG, &agent);
if (!agent)
return;
pci_hose_read_config_byte(hose, dev, FSL_PCIE_CAP_ID, &pcie_cap);
if (pcie_cap != 0x0) {
/* PCIe - set CFG_READY bit of Configuration Ready Register */
pci_hose_write_config_byte(hose, dev, FSL_PCIE_CFG_RDY, 0x1);
} else {
/* PCI - clear ACL bit of PBFR */
pci_hose_read_config_word(hose, dev, FSL_PCI_PBFR, &pbfr);
pbfr &= ~0x20;
pci_hose_write_config_word(hose, dev, FSL_PCI_PBFR, pbfr);
}
}
#ifdef CONFIG_OF_BOARD_SETUP
#include <libfdt.h>
#include <fdt_support.h>
void ft_fsl_pci_setup(void *blob, const char *pci_alias,
struct pci_controller *hose)
{
int off = fdt_path_offset(blob, pci_alias);
if (off >= 0) {
u32 bus_range[2];
bus_range[0] = 0;
bus_range[1] = hose->last_busno - hose->first_busno;
fdt_setprop(blob, off, "bus-range", &bus_range[0], 2*4);
fdt_pci_dma_ranges(blob, off, hose);
}
}
#endif