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linux-loongson/arch/powerpc/sysdev/ppc4xx_pci.c
Tirumala Marri e2efc09e52 powerpc/44x: Adding PCI-E support for PowerPC 460SX based SOC. 
Add support for PCI-e on the AMCC 460SX boards

Signed-off-by: Tirumala Marri <tmarri@amcc.com>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
2010-05-07 15:07:19 -04:00

1978 lines
54 KiB
C
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/*
* PCI / PCI-X / PCI-Express support for 4xx parts
*
* Copyright 2007 Ben. Herrenschmidt <benh@kernel.crashing.org>, IBM Corp.
*
* Most PCI Express code is coming from Stefan Roese implementation for
* arch/ppc in the Denx tree, slightly reworked by me.
*
* Copyright 2007 DENX Software Engineering, Stefan Roese <sr@denx.de>
*
* Some of that comes itself from a previous implementation for 440SPE only
* by Roland Dreier:
*
* Copyright (c) 2005 Cisco Systems. All rights reserved.
* Roland Dreier <rolandd@cisco.com>
*
*/
#undef DEBUG
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/bootmem.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <asm/io.h>
#include <asm/pci-bridge.h>
#include <asm/machdep.h>
#include <asm/dcr.h>
#include <asm/dcr-regs.h>
#include <mm/mmu_decl.h>
#include "ppc4xx_pci.h"
static int dma_offset_set;
#define U64_TO_U32_LOW(val) ((u32)((val) & 0x00000000ffffffffULL))
#define U64_TO_U32_HIGH(val) ((u32)((val) >> 32))
#define RES_TO_U32_LOW(val) \
((sizeof(resource_size_t) > sizeof(u32)) ? U64_TO_U32_LOW(val) : (val))
#define RES_TO_U32_HIGH(val) \
((sizeof(resource_size_t) > sizeof(u32)) ? U64_TO_U32_HIGH(val) : (0))
static inline int ppc440spe_revA(void)
{
/* Catch both 440SPe variants, with and without RAID6 support */
if ((mfspr(SPRN_PVR) & 0xffefffff) == 0x53421890)
return 1;
else
return 0;
}
static void fixup_ppc4xx_pci_bridge(struct pci_dev *dev)
{
struct pci_controller *hose;
int i;
if (dev->devfn != 0 || dev->bus->self != NULL)
return;
hose = pci_bus_to_host(dev->bus);
if (hose == NULL)
return;
if (!of_device_is_compatible(hose->dn, "ibm,plb-pciex") &&
!of_device_is_compatible(hose->dn, "ibm,plb-pcix") &&
!of_device_is_compatible(hose->dn, "ibm,plb-pci"))
return;
if (of_device_is_compatible(hose->dn, "ibm,plb440epx-pci") ||
of_device_is_compatible(hose->dn, "ibm,plb440grx-pci")) {
hose->indirect_type |= PPC_INDIRECT_TYPE_BROKEN_MRM;
}
/* Hide the PCI host BARs from the kernel as their content doesn't
* fit well in the resource management
*/
for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
dev->resource[i].start = dev->resource[i].end = 0;
dev->resource[i].flags = 0;
}
printk(KERN_INFO "PCI: Hiding 4xx host bridge resources %s\n",
pci_name(dev));
}
DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, fixup_ppc4xx_pci_bridge);
static int __init ppc4xx_parse_dma_ranges(struct pci_controller *hose,
void __iomem *reg,
struct resource *res)
{
u64 size;
const u32 *ranges;
int rlen;
int pna = of_n_addr_cells(hose->dn);
int np = pna + 5;
/* Default */
res->start = 0;
size = 0x80000000;
res->end = size - 1;
res->flags = IORESOURCE_MEM | IORESOURCE_PREFETCH;
/* Get dma-ranges property */
ranges = of_get_property(hose->dn, "dma-ranges", &rlen);
if (ranges == NULL)
goto out;
/* Walk it */
while ((rlen -= np * 4) >= 0) {
u32 pci_space = ranges[0];
u64 pci_addr = of_read_number(ranges + 1, 2);
u64 cpu_addr = of_translate_dma_address(hose->dn, ranges + 3);
size = of_read_number(ranges + pna + 3, 2);
ranges += np;
if (cpu_addr == OF_BAD_ADDR || size == 0)
continue;
/* We only care about memory */
if ((pci_space & 0x03000000) != 0x02000000)
continue;
/* We currently only support memory at 0, and pci_addr
* within 32 bits space
*/
if (cpu_addr != 0 || pci_addr > 0xffffffff) {
printk(KERN_WARNING "%s: Ignored unsupported dma range"
" 0x%016llx...0x%016llx -> 0x%016llx\n",
hose->dn->full_name,
pci_addr, pci_addr + size - 1, cpu_addr);
continue;
}
/* Check if not prefetchable */
if (!(pci_space & 0x40000000))
res->flags &= ~IORESOURCE_PREFETCH;
/* Use that */
res->start = pci_addr;
/* Beware of 32 bits resources */
if (sizeof(resource_size_t) == sizeof(u32) &&
(pci_addr + size) > 0x100000000ull)
res->end = 0xffffffff;
else
res->end = res->start + size - 1;
break;
}
/* We only support one global DMA offset */
if (dma_offset_set && pci_dram_offset != res->start) {
printk(KERN_ERR "%s: dma-ranges(s) mismatch\n",
hose->dn->full_name);
return -ENXIO;
}
/* Check that we can fit all of memory as we don't support
* DMA bounce buffers
*/
if (size < total_memory) {
printk(KERN_ERR "%s: dma-ranges too small "
"(size=%llx total_memory=%llx)\n",
hose->dn->full_name, size, (u64)total_memory);
return -ENXIO;
}
/* Check we are a power of 2 size and that base is a multiple of size*/
if ((size & (size - 1)) != 0 ||
(res->start & (size - 1)) != 0) {
printk(KERN_ERR "%s: dma-ranges unaligned\n",
hose->dn->full_name);
return -ENXIO;
}
/* Check that we are fully contained within 32 bits space */
if (res->end > 0xffffffff) {
printk(KERN_ERR "%s: dma-ranges outside of 32 bits space\n",
hose->dn->full_name);
return -ENXIO;
}
out:
dma_offset_set = 1;
pci_dram_offset = res->start;
printk(KERN_INFO "4xx PCI DMA offset set to 0x%08lx\n",
pci_dram_offset);
return 0;
}
/*
* 4xx PCI 2.x part
*/
static int __init ppc4xx_setup_one_pci_PMM(struct pci_controller *hose,
void __iomem *reg,
u64 plb_addr,
u64 pci_addr,
u64 size,
unsigned int flags,
int index)
{
u32 ma, pcila, pciha;
/* Hack warning ! The "old" PCI 2.x cell only let us configure the low
* 32-bit of incoming PLB addresses. The top 4 bits of the 36-bit
* address are actually hard wired to a value that appears to depend
* on the specific SoC. For example, it's 0 on 440EP and 1 on 440EPx.
*
* The trick here is we just crop those top bits and ignore them when
* programming the chip. That means the device-tree has to be right
* for the specific part used (we don't print a warning if it's wrong
* but on the other hand, you'll crash quickly enough), but at least
* this code should work whatever the hard coded value is
*/
plb_addr &= 0xffffffffull;
/* Note: Due to the above hack, the test below doesn't actually test
* if you address is above 4G, but it tests that address and
* (address + size) are both contained in the same 4G
*/
if ((plb_addr + size) > 0xffffffffull || !is_power_of_2(size) ||
size < 0x1000 || (plb_addr & (size - 1)) != 0) {
printk(KERN_WARNING "%s: Resource out of range\n",
hose->dn->full_name);
return -1;
}
ma = (0xffffffffu << ilog2(size)) | 1;
if (flags & IORESOURCE_PREFETCH)
ma |= 2;
pciha = RES_TO_U32_HIGH(pci_addr);
pcila = RES_TO_U32_LOW(pci_addr);
writel(plb_addr, reg + PCIL0_PMM0LA + (0x10 * index));
writel(pcila, reg + PCIL0_PMM0PCILA + (0x10 * index));
writel(pciha, reg + PCIL0_PMM0PCIHA + (0x10 * index));
writel(ma, reg + PCIL0_PMM0MA + (0x10 * index));
return 0;
}
static void __init ppc4xx_configure_pci_PMMs(struct pci_controller *hose,
void __iomem *reg)
{
int i, j, found_isa_hole = 0;
/* Setup outbound memory windows */
for (i = j = 0; i < 3; i++) {
struct resource *res = &hose->mem_resources[i];
/* we only care about memory windows */
if (!(res->flags & IORESOURCE_MEM))
continue;
if (j > 2) {
printk(KERN_WARNING "%s: Too many ranges\n",
hose->dn->full_name);
break;
}
/* Configure the resource */
if (ppc4xx_setup_one_pci_PMM(hose, reg,
res->start,
res->start - hose->pci_mem_offset,
res->end + 1 - res->start,
res->flags,
j) == 0) {
j++;
/* If the resource PCI address is 0 then we have our
* ISA memory hole
*/
if (res->start == hose->pci_mem_offset)
found_isa_hole = 1;
}
}
/* Handle ISA memory hole if not already covered */
if (j <= 2 && !found_isa_hole && hose->isa_mem_size)
if (ppc4xx_setup_one_pci_PMM(hose, reg, hose->isa_mem_phys, 0,
hose->isa_mem_size, 0, j) == 0)
printk(KERN_INFO "%s: Legacy ISA memory support enabled\n",
hose->dn->full_name);
}
static void __init ppc4xx_configure_pci_PTMs(struct pci_controller *hose,
void __iomem *reg,
const struct resource *res)
{
resource_size_t size = res->end - res->start + 1;
u32 sa;
/* Calculate window size */
sa = (0xffffffffu << ilog2(size)) | 1;
sa |= 0x1;
/* RAM is always at 0 local for now */
writel(0, reg + PCIL0_PTM1LA);
writel(sa, reg + PCIL0_PTM1MS);
/* Map on PCI side */
early_write_config_dword(hose, hose->first_busno, 0,
PCI_BASE_ADDRESS_1, res->start);
early_write_config_dword(hose, hose->first_busno, 0,
PCI_BASE_ADDRESS_2, 0x00000000);
early_write_config_word(hose, hose->first_busno, 0,
PCI_COMMAND, 0x0006);
}
static void __init ppc4xx_probe_pci_bridge(struct device_node *np)
{
/* NYI */
struct resource rsrc_cfg;
struct resource rsrc_reg;
struct resource dma_window;
struct pci_controller *hose = NULL;
void __iomem *reg = NULL;
const int *bus_range;
int primary = 0;
/* Check if device is enabled */
if (!of_device_is_available(np)) {
printk(KERN_INFO "%s: Port disabled via device-tree\n",
np->full_name);
return;
}
/* Fetch config space registers address */
if (of_address_to_resource(np, 0, &rsrc_cfg)) {
printk(KERN_ERR "%s: Can't get PCI config register base !",
np->full_name);
return;
}
/* Fetch host bridge internal registers address */
if (of_address_to_resource(np, 3, &rsrc_reg)) {
printk(KERN_ERR "%s: Can't get PCI internal register base !",
np->full_name);
return;
}
/* Check if primary bridge */
if (of_get_property(np, "primary", NULL))
primary = 1;
/* Get bus range if any */
bus_range = of_get_property(np, "bus-range", NULL);
/* Map registers */
reg = ioremap(rsrc_reg.start, rsrc_reg.end + 1 - rsrc_reg.start);
if (reg == NULL) {
printk(KERN_ERR "%s: Can't map registers !", np->full_name);
goto fail;
}
/* Allocate the host controller data structure */
hose = pcibios_alloc_controller(np);
if (!hose)
goto fail;
hose->first_busno = bus_range ? bus_range[0] : 0x0;
hose->last_busno = bus_range ? bus_range[1] : 0xff;
/* Setup config space */
setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4, 0);
/* Disable all windows */
writel(0, reg + PCIL0_PMM0MA);
writel(0, reg + PCIL0_PMM1MA);
writel(0, reg + PCIL0_PMM2MA);
writel(0, reg + PCIL0_PTM1MS);
writel(0, reg + PCIL0_PTM2MS);
/* Parse outbound mapping resources */
pci_process_bridge_OF_ranges(hose, np, primary);
/* Parse inbound mapping resources */
if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0)
goto fail;
/* Configure outbound ranges POMs */
ppc4xx_configure_pci_PMMs(hose, reg);
/* Configure inbound ranges PIMs */
ppc4xx_configure_pci_PTMs(hose, reg, &dma_window);
/* We don't need the registers anymore */
iounmap(reg);
return;
fail:
if (hose)
pcibios_free_controller(hose);
if (reg)
iounmap(reg);
}
/*
* 4xx PCI-X part
*/
static int __init ppc4xx_setup_one_pcix_POM(struct pci_controller *hose,
void __iomem *reg,
u64 plb_addr,
u64 pci_addr,
u64 size,
unsigned int flags,
int index)
{
u32 lah, lal, pciah, pcial, sa;
if (!is_power_of_2(size) || size < 0x1000 ||
(plb_addr & (size - 1)) != 0) {
printk(KERN_WARNING "%s: Resource out of range\n",
hose->dn->full_name);
return -1;
}
/* Calculate register values */
lah = RES_TO_U32_HIGH(plb_addr);
lal = RES_TO_U32_LOW(plb_addr);
pciah = RES_TO_U32_HIGH(pci_addr);
pcial = RES_TO_U32_LOW(pci_addr);
sa = (0xffffffffu << ilog2(size)) | 0x1;
/* Program register values */
if (index == 0) {
writel(lah, reg + PCIX0_POM0LAH);
writel(lal, reg + PCIX0_POM0LAL);
writel(pciah, reg + PCIX0_POM0PCIAH);
writel(pcial, reg + PCIX0_POM0PCIAL);
writel(sa, reg + PCIX0_POM0SA);
} else {
writel(lah, reg + PCIX0_POM1LAH);
writel(lal, reg + PCIX0_POM1LAL);
writel(pciah, reg + PCIX0_POM1PCIAH);
writel(pcial, reg + PCIX0_POM1PCIAL);
writel(sa, reg + PCIX0_POM1SA);
}
return 0;
}
static void __init ppc4xx_configure_pcix_POMs(struct pci_controller *hose,
void __iomem *reg)
{
int i, j, found_isa_hole = 0;
/* Setup outbound memory windows */
for (i = j = 0; i < 3; i++) {
struct resource *res = &hose->mem_resources[i];
/* we only care about memory windows */
if (!(res->flags & IORESOURCE_MEM))
continue;
if (j > 1) {
printk(KERN_WARNING "%s: Too many ranges\n",
hose->dn->full_name);
break;
}
/* Configure the resource */
if (ppc4xx_setup_one_pcix_POM(hose, reg,
res->start,
res->start - hose->pci_mem_offset,
res->end + 1 - res->start,
res->flags,
j) == 0) {
j++;
/* If the resource PCI address is 0 then we have our
* ISA memory hole
*/
if (res->start == hose->pci_mem_offset)
found_isa_hole = 1;
}
}
/* Handle ISA memory hole if not already covered */
if (j <= 1 && !found_isa_hole && hose->isa_mem_size)
if (ppc4xx_setup_one_pcix_POM(hose, reg, hose->isa_mem_phys, 0,
hose->isa_mem_size, 0, j) == 0)
printk(KERN_INFO "%s: Legacy ISA memory support enabled\n",
hose->dn->full_name);
}
static void __init ppc4xx_configure_pcix_PIMs(struct pci_controller *hose,
void __iomem *reg,
const struct resource *res,
int big_pim,
int enable_msi_hole)
{
resource_size_t size = res->end - res->start + 1;
u32 sa;
/* RAM is always at 0 */
writel(0x00000000, reg + PCIX0_PIM0LAH);
writel(0x00000000, reg + PCIX0_PIM0LAL);
/* Calculate window size */
sa = (0xffffffffu << ilog2(size)) | 1;
sa |= 0x1;
if (res->flags & IORESOURCE_PREFETCH)
sa |= 0x2;
if (enable_msi_hole)
sa |= 0x4;
writel(sa, reg + PCIX0_PIM0SA);
if (big_pim)
writel(0xffffffff, reg + PCIX0_PIM0SAH);
/* Map on PCI side */
writel(0x00000000, reg + PCIX0_BAR0H);
writel(res->start, reg + PCIX0_BAR0L);
writew(0x0006, reg + PCIX0_COMMAND);
}
static void __init ppc4xx_probe_pcix_bridge(struct device_node *np)
{
struct resource rsrc_cfg;
struct resource rsrc_reg;
struct resource dma_window;
struct pci_controller *hose = NULL;
void __iomem *reg = NULL;
const int *bus_range;
int big_pim = 0, msi = 0, primary = 0;
/* Fetch config space registers address */
if (of_address_to_resource(np, 0, &rsrc_cfg)) {
printk(KERN_ERR "%s:Can't get PCI-X config register base !",
np->full_name);
return;
}
/* Fetch host bridge internal registers address */
if (of_address_to_resource(np, 3, &rsrc_reg)) {
printk(KERN_ERR "%s: Can't get PCI-X internal register base !",
np->full_name);
return;
}
/* Check if it supports large PIMs (440GX) */
if (of_get_property(np, "large-inbound-windows", NULL))
big_pim = 1;
/* Check if we should enable MSIs inbound hole */
if (of_get_property(np, "enable-msi-hole", NULL))
msi = 1;
/* Check if primary bridge */
if (of_get_property(np, "primary", NULL))
primary = 1;
/* Get bus range if any */
bus_range = of_get_property(np, "bus-range", NULL);
/* Map registers */
reg = ioremap(rsrc_reg.start, rsrc_reg.end + 1 - rsrc_reg.start);
if (reg == NULL) {
printk(KERN_ERR "%s: Can't map registers !", np->full_name);
goto fail;
}
/* Allocate the host controller data structure */
hose = pcibios_alloc_controller(np);
if (!hose)
goto fail;
hose->first_busno = bus_range ? bus_range[0] : 0x0;
hose->last_busno = bus_range ? bus_range[1] : 0xff;
/* Setup config space */
setup_indirect_pci(hose, rsrc_cfg.start, rsrc_cfg.start + 0x4,
PPC_INDIRECT_TYPE_SET_CFG_TYPE);
/* Disable all windows */
writel(0, reg + PCIX0_POM0SA);
writel(0, reg + PCIX0_POM1SA);
writel(0, reg + PCIX0_POM2SA);
writel(0, reg + PCIX0_PIM0SA);
writel(0, reg + PCIX0_PIM1SA);
writel(0, reg + PCIX0_PIM2SA);
if (big_pim) {
writel(0, reg + PCIX0_PIM0SAH);
writel(0, reg + PCIX0_PIM2SAH);
}
/* Parse outbound mapping resources */
pci_process_bridge_OF_ranges(hose, np, primary);
/* Parse inbound mapping resources */
if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0)
goto fail;
/* Configure outbound ranges POMs */
ppc4xx_configure_pcix_POMs(hose, reg);
/* Configure inbound ranges PIMs */
ppc4xx_configure_pcix_PIMs(hose, reg, &dma_window, big_pim, msi);
/* We don't need the registers anymore */
iounmap(reg);
return;
fail:
if (hose)
pcibios_free_controller(hose);
if (reg)
iounmap(reg);
}
#ifdef CONFIG_PPC4xx_PCI_EXPRESS
/*
* 4xx PCI-Express part
*
* We support 3 parts currently based on the compatible property:
*
* ibm,plb-pciex-440spe
* ibm,plb-pciex-405ex
* ibm,plb-pciex-460ex
*
* Anything else will be rejected for now as they are all subtly
* different unfortunately.
*
*/
#define MAX_PCIE_BUS_MAPPED 0x40
struct ppc4xx_pciex_port
{
struct pci_controller *hose;
struct device_node *node;
unsigned int index;
int endpoint;
int link;
int has_ibpre;
unsigned int sdr_base;
dcr_host_t dcrs;
struct resource cfg_space;
struct resource utl_regs;
void __iomem *utl_base;
};
static struct ppc4xx_pciex_port *ppc4xx_pciex_ports;
static unsigned int ppc4xx_pciex_port_count;
struct ppc4xx_pciex_hwops
{
int (*core_init)(struct device_node *np);
int (*port_init_hw)(struct ppc4xx_pciex_port *port);
int (*setup_utl)(struct ppc4xx_pciex_port *port);
};
static struct ppc4xx_pciex_hwops *ppc4xx_pciex_hwops;
#ifdef CONFIG_44x
/* Check various reset bits of the 440SPe PCIe core */
static int __init ppc440spe_pciex_check_reset(struct device_node *np)
{
u32 valPE0, valPE1, valPE2;
int err = 0;
/* SDR0_PEGPLLLCT1 reset */
if (!(mfdcri(SDR0, PESDR0_PLLLCT1) & 0x01000000)) {
/*
* the PCIe core was probably already initialised
* by firmware - let's re-reset RCSSET regs
*
* -- Shouldn't we also re-reset the whole thing ? -- BenH
*/
pr_debug("PCIE: SDR0_PLLLCT1 already reset.\n");
mtdcri(SDR0, PESDR0_440SPE_RCSSET, 0x01010000);
mtdcri(SDR0, PESDR1_440SPE_RCSSET, 0x01010000);
mtdcri(SDR0, PESDR2_440SPE_RCSSET, 0x01010000);
}
valPE0 = mfdcri(SDR0, PESDR0_440SPE_RCSSET);
valPE1 = mfdcri(SDR0, PESDR1_440SPE_RCSSET);
valPE2 = mfdcri(SDR0, PESDR2_440SPE_RCSSET);
/* SDR0_PExRCSSET rstgu */
if (!(valPE0 & 0x01000000) ||
!(valPE1 & 0x01000000) ||
!(valPE2 & 0x01000000)) {
printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstgu error\n");
err = -1;
}
/* SDR0_PExRCSSET rstdl */
if (!(valPE0 & 0x00010000) ||
!(valPE1 & 0x00010000) ||
!(valPE2 & 0x00010000)) {
printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstdl error\n");
err = -1;
}
/* SDR0_PExRCSSET rstpyn */
if ((valPE0 & 0x00001000) ||
(valPE1 & 0x00001000) ||
(valPE2 & 0x00001000)) {
printk(KERN_INFO "PCIE: SDR0_PExRCSSET rstpyn error\n");
err = -1;
}
/* SDR0_PExRCSSET hldplb */
if ((valPE0 & 0x10000000) ||
(valPE1 & 0x10000000) ||
(valPE2 & 0x10000000)) {
printk(KERN_INFO "PCIE: SDR0_PExRCSSET hldplb error\n");
err = -1;
}
/* SDR0_PExRCSSET rdy */
if ((valPE0 & 0x00100000) ||
(valPE1 & 0x00100000) ||
(valPE2 & 0x00100000)) {
printk(KERN_INFO "PCIE: SDR0_PExRCSSET rdy error\n");
err = -1;
}
/* SDR0_PExRCSSET shutdown */
if ((valPE0 & 0x00000100) ||
(valPE1 & 0x00000100) ||
(valPE2 & 0x00000100)) {
printk(KERN_INFO "PCIE: SDR0_PExRCSSET shutdown error\n");
err = -1;
}
return err;
}
/* Global PCIe core initializations for 440SPe core */
static int __init ppc440spe_pciex_core_init(struct device_node *np)
{
int time_out = 20;
/* Set PLL clock receiver to LVPECL */
dcri_clrset(SDR0, PESDR0_PLLLCT1, 0, 1 << 28);
/* Shouldn't we do all the calibration stuff etc... here ? */
if (ppc440spe_pciex_check_reset(np))
return -ENXIO;
if (!(mfdcri(SDR0, PESDR0_PLLLCT2) & 0x10000)) {
printk(KERN_INFO "PCIE: PESDR_PLLCT2 resistance calibration "
"failed (0x%08x)\n",
mfdcri(SDR0, PESDR0_PLLLCT2));
return -1;
}
/* De-assert reset of PCIe PLL, wait for lock */
dcri_clrset(SDR0, PESDR0_PLLLCT1, 1 << 24, 0);
udelay(3);
while (time_out) {
if (!(mfdcri(SDR0, PESDR0_PLLLCT3) & 0x10000000)) {
time_out--;
udelay(1);
} else
break;
}
if (!time_out) {
printk(KERN_INFO "PCIE: VCO output not locked\n");
return -1;
}
pr_debug("PCIE initialization OK\n");
return 3;
}
static int ppc440spe_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
{
u32 val = 1 << 24;
if (port->endpoint)
val = PTYPE_LEGACY_ENDPOINT << 20;
else
val = PTYPE_ROOT_PORT << 20;
if (port->index == 0)
val |= LNKW_X8 << 12;
else
val |= LNKW_X4 << 12;
mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val);
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x20222222);
if (ppc440spe_revA())
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x11000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL0SET1, 0x35000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL1SET1, 0x35000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL2SET1, 0x35000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL3SET1, 0x35000000);
if (port->index == 0) {
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL4SET1,
0x35000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL5SET1,
0x35000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL6SET1,
0x35000000);
mtdcri(SDR0, port->sdr_base + PESDRn_440SPE_HSSL7SET1,
0x35000000);
}
dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET,
(1 << 24) | (1 << 16), 1 << 12);
return 0;
}
static int ppc440speA_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
{
return ppc440spe_pciex_init_port_hw(port);
}
static int ppc440speB_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
{
int rc = ppc440spe_pciex_init_port_hw(port);
port->has_ibpre = 1;
return rc;
}
static int ppc440speA_pciex_init_utl(struct ppc4xx_pciex_port *port)
{
/* XXX Check what that value means... I hate magic */
dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x68782800);
/*
* Set buffer allocations and then assert VRB and TXE.
*/
out_be32(port->utl_base + PEUTL_OUTTR, 0x08000000);
out_be32(port->utl_base + PEUTL_INTR, 0x02000000);
out_be32(port->utl_base + PEUTL_OPDBSZ, 0x10000000);
out_be32(port->utl_base + PEUTL_PBBSZ, 0x53000000);
out_be32(port->utl_base + PEUTL_IPHBSZ, 0x08000000);
out_be32(port->utl_base + PEUTL_IPDBSZ, 0x10000000);
out_be32(port->utl_base + PEUTL_RCIRQEN, 0x00f00000);
out_be32(port->utl_base + PEUTL_PCTL, 0x80800066);
return 0;
}
static int ppc440speB_pciex_init_utl(struct ppc4xx_pciex_port *port)
{
/* Report CRS to the operating system */
out_be32(port->utl_base + PEUTL_PBCTL, 0x08000000);
return 0;
}
static struct ppc4xx_pciex_hwops ppc440speA_pcie_hwops __initdata =
{
.core_init = ppc440spe_pciex_core_init,
.port_init_hw = ppc440speA_pciex_init_port_hw,
.setup_utl = ppc440speA_pciex_init_utl,
};
static struct ppc4xx_pciex_hwops ppc440speB_pcie_hwops __initdata =
{
.core_init = ppc440spe_pciex_core_init,
.port_init_hw = ppc440speB_pciex_init_port_hw,
.setup_utl = ppc440speB_pciex_init_utl,
};
static int __init ppc460ex_pciex_core_init(struct device_node *np)
{
/* Nothing to do, return 2 ports */
return 2;
}
static int ppc460ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
{
u32 val;
u32 utlset1;
if (port->endpoint)
val = PTYPE_LEGACY_ENDPOINT << 20;
else
val = PTYPE_ROOT_PORT << 20;
if (port->index == 0) {
val |= LNKW_X1 << 12;
utlset1 = 0x20000000;
} else {
val |= LNKW_X4 << 12;
utlset1 = 0x20101101;
}
mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET, val);
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, utlset1);
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01210000);
switch (port->index) {
case 0:
mtdcri(SDR0, PESDR0_460EX_L0CDRCTL, 0x00003230);
mtdcri(SDR0, PESDR0_460EX_L0DRV, 0x00000130);
mtdcri(SDR0, PESDR0_460EX_L0CLK, 0x00000006);
mtdcri(SDR0, PESDR0_460EX_PHY_CTL_RST,0x10000000);
break;
case 1:
mtdcri(SDR0, PESDR1_460EX_L0CDRCTL, 0x00003230);
mtdcri(SDR0, PESDR1_460EX_L1CDRCTL, 0x00003230);
mtdcri(SDR0, PESDR1_460EX_L2CDRCTL, 0x00003230);
mtdcri(SDR0, PESDR1_460EX_L3CDRCTL, 0x00003230);
mtdcri(SDR0, PESDR1_460EX_L0DRV, 0x00000130);
mtdcri(SDR0, PESDR1_460EX_L1DRV, 0x00000130);
mtdcri(SDR0, PESDR1_460EX_L2DRV, 0x00000130);
mtdcri(SDR0, PESDR1_460EX_L3DRV, 0x00000130);
mtdcri(SDR0, PESDR1_460EX_L0CLK, 0x00000006);
mtdcri(SDR0, PESDR1_460EX_L1CLK, 0x00000006);
mtdcri(SDR0, PESDR1_460EX_L2CLK, 0x00000006);
mtdcri(SDR0, PESDR1_460EX_L3CLK, 0x00000006);
mtdcri(SDR0, PESDR1_460EX_PHY_CTL_RST,0x10000000);
break;
}
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET,
mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) |
(PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTPYN));
/* Poll for PHY reset */
/* XXX FIXME add timeout */
switch (port->index) {
case 0:
while (!(mfdcri(SDR0, PESDR0_460EX_RSTSTA) & 0x1))
udelay(10);
break;
case 1:
while (!(mfdcri(SDR0, PESDR1_460EX_RSTSTA) & 0x1))
udelay(10);
break;
}
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET,
(mfdcri(SDR0, port->sdr_base + PESDRn_RCSSET) &
~(PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL)) |
PESDRx_RCSSET_RSTPYN);
port->has_ibpre = 1;
return 0;
}
static int ppc460ex_pciex_init_utl(struct ppc4xx_pciex_port *port)
{
dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x0);
/*
* Set buffer allocations and then assert VRB and TXE.
*/
out_be32(port->utl_base + PEUTL_PBCTL, 0x0800000c);
out_be32(port->utl_base + PEUTL_OUTTR, 0x08000000);
out_be32(port->utl_base + PEUTL_INTR, 0x02000000);
out_be32(port->utl_base + PEUTL_OPDBSZ, 0x04000000);
out_be32(port->utl_base + PEUTL_PBBSZ, 0x00000000);
out_be32(port->utl_base + PEUTL_IPHBSZ, 0x02000000);
out_be32(port->utl_base + PEUTL_IPDBSZ, 0x04000000);
out_be32(port->utl_base + PEUTL_RCIRQEN,0x00f00000);
out_be32(port->utl_base + PEUTL_PCTL, 0x80800066);
return 0;
}
static struct ppc4xx_pciex_hwops ppc460ex_pcie_hwops __initdata =
{
.core_init = ppc460ex_pciex_core_init,
.port_init_hw = ppc460ex_pciex_init_port_hw,
.setup_utl = ppc460ex_pciex_init_utl,
};
static int __init ppc460sx_pciex_core_init(struct device_node *np)
{
/* HSS drive amplitude */
mtdcri(SDR0, PESDR0_460SX_HSSL0DAMP, 0xB9843211);
mtdcri(SDR0, PESDR0_460SX_HSSL1DAMP, 0xB9843211);
mtdcri(SDR0, PESDR0_460SX_HSSL2DAMP, 0xB9843211);
mtdcri(SDR0, PESDR0_460SX_HSSL3DAMP, 0xB9843211);
mtdcri(SDR0, PESDR0_460SX_HSSL4DAMP, 0xB9843211);
mtdcri(SDR0, PESDR0_460SX_HSSL5DAMP, 0xB9843211);
mtdcri(SDR0, PESDR0_460SX_HSSL6DAMP, 0xB9843211);
mtdcri(SDR0, PESDR0_460SX_HSSL7DAMP, 0xB9843211);
mtdcri(SDR0, PESDR1_460SX_HSSL0DAMP, 0xB9843211);
mtdcri(SDR0, PESDR1_460SX_HSSL1DAMP, 0xB9843211);
mtdcri(SDR0, PESDR1_460SX_HSSL2DAMP, 0xB9843211);
mtdcri(SDR0, PESDR1_460SX_HSSL3DAMP, 0xB9843211);
mtdcri(SDR0, PESDR2_460SX_HSSL0DAMP, 0xB9843211);
mtdcri(SDR0, PESDR2_460SX_HSSL1DAMP, 0xB9843211);
mtdcri(SDR0, PESDR2_460SX_HSSL2DAMP, 0xB9843211);
mtdcri(SDR0, PESDR2_460SX_HSSL3DAMP, 0xB9843211);
/* HSS TX pre-emphasis */
mtdcri(SDR0, PESDR0_460SX_HSSL0COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR0_460SX_HSSL1COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR0_460SX_HSSL2COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR0_460SX_HSSL3COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR0_460SX_HSSL4COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR0_460SX_HSSL5COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR0_460SX_HSSL6COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR0_460SX_HSSL7COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR1_460SX_HSSL0COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR1_460SX_HSSL1COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR1_460SX_HSSL2COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR1_460SX_HSSL3COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR2_460SX_HSSL0COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR2_460SX_HSSL1COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR2_460SX_HSSL2COEFA, 0xDCB98987);
mtdcri(SDR0, PESDR2_460SX_HSSL3COEFA, 0xDCB98987);
/* HSS TX calibration control */
mtdcri(SDR0, PESDR0_460SX_HSSL1CALDRV, 0x22222222);
mtdcri(SDR0, PESDR1_460SX_HSSL1CALDRV, 0x22220000);
mtdcri(SDR0, PESDR2_460SX_HSSL1CALDRV, 0x22220000);
/* HSS TX slew control */
mtdcri(SDR0, PESDR0_460SX_HSSSLEW, 0xFFFFFFFF);
mtdcri(SDR0, PESDR1_460SX_HSSSLEW, 0xFFFF0000);
mtdcri(SDR0, PESDR2_460SX_HSSSLEW, 0xFFFF0000);
udelay(100);
/* De-assert PLLRESET */
dcri_clrset(SDR0, PESDR0_PLLLCT2, 0x00000100, 0);
/* Reset DL, UTL, GPL before configuration */
mtdcri(SDR0, PESDR0_460SX_RCSSET,
PESDRx_RCSSET_RSTDL | PESDRx_RCSSET_RSTGU);
mtdcri(SDR0, PESDR1_460SX_RCSSET,
PESDRx_RCSSET_RSTDL | PESDRx_RCSSET_RSTGU);
mtdcri(SDR0, PESDR2_460SX_RCSSET,
PESDRx_RCSSET_RSTDL | PESDRx_RCSSET_RSTGU);
udelay(100);
/*
* If bifurcation is not enabled, u-boot would have disabled the
* third PCIe port
*/
if (((mfdcri(SDR0, PESDR1_460SX_HSSCTLSET) & 0x00000001) ==
0x00000001)) {
printk(KERN_INFO "PCI: PCIE bifurcation setup successfully.\n");
printk(KERN_INFO "PCI: Total 3 PCIE ports are present\n");
return 3;
}
printk(KERN_INFO "PCI: Total 2 PCIE ports are present\n");
return 2;
}
static int ppc460sx_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
{
if (port->endpoint)
dcri_clrset(SDR0, port->sdr_base + PESDRn_UTLSET2,
0x01000000, 0);
else
dcri_clrset(SDR0, port->sdr_base + PESDRn_UTLSET2,
0, 0x01000000);
/*Gen-1*/
mtdcri(SDR0, port->sdr_base + PESDRn_460SX_RCEI, 0x08000000);
dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET,
(PESDRx_RCSSET_RSTGU | PESDRx_RCSSET_RSTDL),
PESDRx_RCSSET_RSTPYN);
port->has_ibpre = 1;
return 0;
}
static int ppc460sx_pciex_init_utl(struct ppc4xx_pciex_port *port)
{
/* Max 128 Bytes */
out_be32 (port->utl_base + PEUTL_PBBSZ, 0x00000000);
return 0;
}
static struct ppc4xx_pciex_hwops ppc460sx_pcie_hwops __initdata = {
.core_init = ppc460sx_pciex_core_init,
.port_init_hw = ppc460sx_pciex_init_port_hw,
.setup_utl = ppc460sx_pciex_init_utl,
};
#endif /* CONFIG_44x */
#ifdef CONFIG_40x
static int __init ppc405ex_pciex_core_init(struct device_node *np)
{
/* Nothing to do, return 2 ports */
return 2;
}
static void ppc405ex_pcie_phy_reset(struct ppc4xx_pciex_port *port)
{
/* Assert the PE0_PHY reset */
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01010000);
msleep(1);
/* deassert the PE0_hotreset */
if (port->endpoint)
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01111000);
else
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x01101000);
/* poll for phy !reset */
/* XXX FIXME add timeout */
while (!(mfdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSTA) & 0x00001000))
;
/* deassert the PE0_gpl_utl_reset */
mtdcri(SDR0, port->sdr_base + PESDRn_RCSSET, 0x00101000);
}
static int ppc405ex_pciex_init_port_hw(struct ppc4xx_pciex_port *port)
{
u32 val;
if (port->endpoint)
val = PTYPE_LEGACY_ENDPOINT;
else
val = PTYPE_ROOT_PORT;
mtdcri(SDR0, port->sdr_base + PESDRn_DLPSET,
1 << 24 | val << 20 | LNKW_X1 << 12);
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET1, 0x00000000);
mtdcri(SDR0, port->sdr_base + PESDRn_UTLSET2, 0x01010000);
mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET1, 0x720F0000);
mtdcri(SDR0, port->sdr_base + PESDRn_405EX_PHYSET2, 0x70600003);
/*
* Only reset the PHY when no link is currently established.
* This is for the Atheros PCIe board which has problems to establish
* the link (again) after this PHY reset. All other currently tested
* PCIe boards don't show this problem.
* This has to be re-tested and fixed in a later release!
*/
val = mfdcri(SDR0, port->sdr_base + PESDRn_LOOP);
if (!(val & 0x00001000))
ppc405ex_pcie_phy_reset(port);
dcr_write(port->dcrs, DCRO_PEGPL_CFG, 0x10000000); /* guarded on */
port->has_ibpre = 1;
return 0;
}
static int ppc405ex_pciex_init_utl(struct ppc4xx_pciex_port *port)
{
dcr_write(port->dcrs, DCRO_PEGPL_SPECIAL, 0x0);
/*
* Set buffer allocations and then assert VRB and TXE.
*/
out_be32(port->utl_base + PEUTL_OUTTR, 0x02000000);
out_be32(port->utl_base + PEUTL_INTR, 0x02000000);
out_be32(port->utl_base + PEUTL_OPDBSZ, 0x04000000);
out_be32(port->utl_base + PEUTL_PBBSZ, 0x21000000);
out_be32(port->utl_base + PEUTL_IPHBSZ, 0x02000000);
out_be32(port->utl_base + PEUTL_IPDBSZ, 0x04000000);
out_be32(port->utl_base + PEUTL_RCIRQEN, 0x00f00000);
out_be32(port->utl_base + PEUTL_PCTL, 0x80800066);
out_be32(port->utl_base + PEUTL_PBCTL, 0x08000000);
return 0;
}
static struct ppc4xx_pciex_hwops ppc405ex_pcie_hwops __initdata =
{
.core_init = ppc405ex_pciex_core_init,
.port_init_hw = ppc405ex_pciex_init_port_hw,
.setup_utl = ppc405ex_pciex_init_utl,
};
#endif /* CONFIG_40x */
/* Check that the core has been initied and if not, do it */
static int __init ppc4xx_pciex_check_core_init(struct device_node *np)
{
static int core_init;
int count = -ENODEV;
if (core_init++)
return 0;
#ifdef CONFIG_44x
if (of_device_is_compatible(np, "ibm,plb-pciex-440spe")) {
if (ppc440spe_revA())
ppc4xx_pciex_hwops = &ppc440speA_pcie_hwops;
else
ppc4xx_pciex_hwops = &ppc440speB_pcie_hwops;
}
if (of_device_is_compatible(np, "ibm,plb-pciex-460ex"))
ppc4xx_pciex_hwops = &ppc460ex_pcie_hwops;
if (of_device_is_compatible(np, "ibm,plb-pciex-460sx"))
ppc4xx_pciex_hwops = &ppc460sx_pcie_hwops;
#endif /* CONFIG_44x */
#ifdef CONFIG_40x
if (of_device_is_compatible(np, "ibm,plb-pciex-405ex"))
ppc4xx_pciex_hwops = &ppc405ex_pcie_hwops;
#endif
if (ppc4xx_pciex_hwops == NULL) {
printk(KERN_WARNING "PCIE: unknown host type %s\n",
np->full_name);
return -ENODEV;
}
count = ppc4xx_pciex_hwops->core_init(np);
if (count > 0) {
ppc4xx_pciex_ports =
kzalloc(count * sizeof(struct ppc4xx_pciex_port),
GFP_KERNEL);
if (ppc4xx_pciex_ports) {
ppc4xx_pciex_port_count = count;
return 0;
}
printk(KERN_WARNING "PCIE: failed to allocate ports array\n");
return -ENOMEM;
}
return -ENODEV;
}
static void __init ppc4xx_pciex_port_init_mapping(struct ppc4xx_pciex_port *port)
{
/* We map PCI Express configuration based on the reg property */
dcr_write(port->dcrs, DCRO_PEGPL_CFGBAH,
RES_TO_U32_HIGH(port->cfg_space.start));
dcr_write(port->dcrs, DCRO_PEGPL_CFGBAL,
RES_TO_U32_LOW(port->cfg_space.start));
/* XXX FIXME: Use size from reg property. For now, map 512M */
dcr_write(port->dcrs, DCRO_PEGPL_CFGMSK, 0xe0000001);
/* We map UTL registers based on the reg property */
dcr_write(port->dcrs, DCRO_PEGPL_REGBAH,
RES_TO_U32_HIGH(port->utl_regs.start));
dcr_write(port->dcrs, DCRO_PEGPL_REGBAL,
RES_TO_U32_LOW(port->utl_regs.start));
/* XXX FIXME: Use size from reg property */
dcr_write(port->dcrs, DCRO_PEGPL_REGMSK, 0x00007001);
/* Disable all other outbound windows */
dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, 0);
dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, 0);
dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, 0);
dcr_write(port->dcrs, DCRO_PEGPL_MSGMSK, 0);
}
static int __init ppc4xx_pciex_wait_on_sdr(struct ppc4xx_pciex_port *port,
unsigned int sdr_offset,
unsigned int mask,
unsigned int value,
int timeout_ms)
{
u32 val;
while(timeout_ms--) {
val = mfdcri(SDR0, port->sdr_base + sdr_offset);
if ((val & mask) == value) {
pr_debug("PCIE%d: Wait on SDR %x success with tm %d (%08x)\n",
port->index, sdr_offset, timeout_ms, val);
return 0;
}
msleep(1);
}
return -1;
}
static int __init ppc4xx_pciex_port_init(struct ppc4xx_pciex_port *port)
{
int rc = 0;
/* Init HW */
if (ppc4xx_pciex_hwops->port_init_hw)
rc = ppc4xx_pciex_hwops->port_init_hw(port);
if (rc != 0)
return rc;
printk(KERN_INFO "PCIE%d: Checking link...\n",
port->index);
/* Wait for reset to complete */
if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS, 1 << 20, 0, 10)) {
printk(KERN_WARNING "PCIE%d: PGRST failed\n",
port->index);
return -1;
}
/* Check for card presence detect if supported, if not, just wait for
* link unconditionally.
*
* note that we don't fail if there is no link, we just filter out
* config space accesses. That way, it will be easier to implement
* hotplug later on.
*/
if (!port->has_ibpre ||
!ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP,
1 << 28, 1 << 28, 100)) {
printk(KERN_INFO
"PCIE%d: Device detected, waiting for link...\n",
port->index);
if (ppc4xx_pciex_wait_on_sdr(port, PESDRn_LOOP,
0x1000, 0x1000, 2000))
printk(KERN_WARNING
"PCIE%d: Link up failed\n", port->index);
else {
printk(KERN_INFO
"PCIE%d: link is up !\n", port->index);
port->link = 1;
}
} else
printk(KERN_INFO "PCIE%d: No device detected.\n", port->index);
/*
* Initialize mapping: disable all regions and configure
* CFG and REG regions based on resources in the device tree
*/
ppc4xx_pciex_port_init_mapping(port);
/*
* Map UTL
*/
port->utl_base = ioremap(port->utl_regs.start, 0x100);
BUG_ON(port->utl_base == NULL);
/*
* Setup UTL registers --BenH.
*/
if (ppc4xx_pciex_hwops->setup_utl)
ppc4xx_pciex_hwops->setup_utl(port);
/*
* Check for VC0 active and assert RDY.
*/
if (port->link &&
ppc4xx_pciex_wait_on_sdr(port, PESDRn_RCSSTS,
1 << 16, 1 << 16, 5000)) {
printk(KERN_INFO "PCIE%d: VC0 not active\n", port->index);
port->link = 0;
}
dcri_clrset(SDR0, port->sdr_base + PESDRn_RCSSET, 0, 1 << 20);
msleep(100);
return 0;
}
static int ppc4xx_pciex_validate_bdf(struct ppc4xx_pciex_port *port,
struct pci_bus *bus,
unsigned int devfn)
{
static int message;
/* Endpoint can not generate upstream(remote) config cycles */
if (port->endpoint && bus->number != port->hose->first_busno)
return PCIBIOS_DEVICE_NOT_FOUND;
/* Check we are within the mapped range */
if (bus->number > port->hose->last_busno) {
if (!message) {
printk(KERN_WARNING "Warning! Probing bus %u"
" out of range !\n", bus->number);
message++;
}
return PCIBIOS_DEVICE_NOT_FOUND;
}
/* The root complex has only one device / function */
if (bus->number == port->hose->first_busno && devfn != 0)
return PCIBIOS_DEVICE_NOT_FOUND;
/* The other side of the RC has only one device as well */
if (bus->number == (port->hose->first_busno + 1) &&
PCI_SLOT(devfn) != 0)
return PCIBIOS_DEVICE_NOT_FOUND;
/* Check if we have a link */
if ((bus->number != port->hose->first_busno) && !port->link)
return PCIBIOS_DEVICE_NOT_FOUND;
return 0;
}
static void __iomem *ppc4xx_pciex_get_config_base(struct ppc4xx_pciex_port *port,
struct pci_bus *bus,
unsigned int devfn)
{
int relbus;
/* Remove the casts when we finally remove the stupid volatile
* in struct pci_controller
*/
if (bus->number == port->hose->first_busno)
return (void __iomem *)port->hose->cfg_addr;
relbus = bus->number - (port->hose->first_busno + 1);
return (void __iomem *)port->hose->cfg_data +
((relbus << 20) | (devfn << 12));
}
static int ppc4xx_pciex_read_config(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 *val)
{
struct pci_controller *hose = pci_bus_to_host(bus);
struct ppc4xx_pciex_port *port =
&ppc4xx_pciex_ports[hose->indirect_type];
void __iomem *addr;
u32 gpl_cfg;
BUG_ON(hose != port->hose);
if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0)
return PCIBIOS_DEVICE_NOT_FOUND;
addr = ppc4xx_pciex_get_config_base(port, bus, devfn);
/*
* Reading from configuration space of non-existing device can
* generate transaction errors. For the read duration we suppress
* assertion of machine check exceptions to avoid those.
*/
gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG);
dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA);
/* Make sure no CRS is recorded */
out_be32(port->utl_base + PEUTL_RCSTA, 0x00040000);
switch (len) {
case 1:
*val = in_8((u8 *)(addr + offset));
break;
case 2:
*val = in_le16((u16 *)(addr + offset));
break;
default:
*val = in_le32((u32 *)(addr + offset));
break;
}
pr_debug("pcie-config-read: bus=%3d [%3d..%3d] devfn=0x%04x"
" offset=0x%04x len=%d, addr=0x%p val=0x%08x\n",
bus->number, hose->first_busno, hose->last_busno,
devfn, offset, len, addr + offset, *val);
/* Check for CRS (440SPe rev B does that for us but heh ..) */
if (in_be32(port->utl_base + PEUTL_RCSTA) & 0x00040000) {
pr_debug("Got CRS !\n");
if (len != 4 || offset != 0)
return PCIBIOS_DEVICE_NOT_FOUND;
*val = 0xffff0001;
}
dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg);
return PCIBIOS_SUCCESSFUL;
}
static int ppc4xx_pciex_write_config(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 val)
{
struct pci_controller *hose = pci_bus_to_host(bus);
struct ppc4xx_pciex_port *port =
&ppc4xx_pciex_ports[hose->indirect_type];
void __iomem *addr;
u32 gpl_cfg;
if (ppc4xx_pciex_validate_bdf(port, bus, devfn) != 0)
return PCIBIOS_DEVICE_NOT_FOUND;
addr = ppc4xx_pciex_get_config_base(port, bus, devfn);
/*
* Reading from configuration space of non-existing device can
* generate transaction errors. For the read duration we suppress
* assertion of machine check exceptions to avoid those.
*/
gpl_cfg = dcr_read(port->dcrs, DCRO_PEGPL_CFG);
dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg | GPL_DMER_MASK_DISA);
pr_debug("pcie-config-write: bus=%3d [%3d..%3d] devfn=0x%04x"
" offset=0x%04x len=%d, addr=0x%p val=0x%08x\n",
bus->number, hose->first_busno, hose->last_busno,
devfn, offset, len, addr + offset, val);
switch (len) {
case 1:
out_8((u8 *)(addr + offset), val);
break;
case 2:
out_le16((u16 *)(addr + offset), val);
break;
default:
out_le32((u32 *)(addr + offset), val);
break;
}
dcr_write(port->dcrs, DCRO_PEGPL_CFG, gpl_cfg);
return PCIBIOS_SUCCESSFUL;
}
static struct pci_ops ppc4xx_pciex_pci_ops =
{
.read = ppc4xx_pciex_read_config,
.write = ppc4xx_pciex_write_config,
};
static int __init ppc4xx_setup_one_pciex_POM(struct ppc4xx_pciex_port *port,
struct pci_controller *hose,
void __iomem *mbase,
u64 plb_addr,
u64 pci_addr,
u64 size,
unsigned int flags,
int index)
{
u32 lah, lal, pciah, pcial, sa;
if (!is_power_of_2(size) ||
(index < 2 && size < 0x100000) ||
(index == 2 && size < 0x100) ||
(plb_addr & (size - 1)) != 0) {
printk(KERN_WARNING "%s: Resource out of range\n",
hose->dn->full_name);
return -1;
}
/* Calculate register values */
lah = RES_TO_U32_HIGH(plb_addr);
lal = RES_TO_U32_LOW(plb_addr);
pciah = RES_TO_U32_HIGH(pci_addr);
pcial = RES_TO_U32_LOW(pci_addr);
sa = (0xffffffffu << ilog2(size)) | 0x1;
/* Program register values */
switch (index) {
case 0:
out_le32(mbase + PECFG_POM0LAH, pciah);
out_le32(mbase + PECFG_POM0LAL, pcial);
dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAH, lah);
dcr_write(port->dcrs, DCRO_PEGPL_OMR1BAL, lal);
dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKH, 0x7fffffff);
/* Note that 3 here means enabled | single region */
dcr_write(port->dcrs, DCRO_PEGPL_OMR1MSKL, sa | 3);
break;
case 1:
out_le32(mbase + PECFG_POM1LAH, pciah);
out_le32(mbase + PECFG_POM1LAL, pcial);
dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAH, lah);
dcr_write(port->dcrs, DCRO_PEGPL_OMR2BAL, lal);
dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKH, 0x7fffffff);
/* Note that 3 here means enabled | single region */
dcr_write(port->dcrs, DCRO_PEGPL_OMR2MSKL, sa | 3);
break;
case 2:
out_le32(mbase + PECFG_POM2LAH, pciah);
out_le32(mbase + PECFG_POM2LAL, pcial);
dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAH, lah);
dcr_write(port->dcrs, DCRO_PEGPL_OMR3BAL, lal);
dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKH, 0x7fffffff);
/* Note that 3 here means enabled | IO space !!! */
dcr_write(port->dcrs, DCRO_PEGPL_OMR3MSKL, sa | 3);
break;
}
return 0;
}
static void __init ppc4xx_configure_pciex_POMs(struct ppc4xx_pciex_port *port,
struct pci_controller *hose,
void __iomem *mbase)
{
int i, j, found_isa_hole = 0;
/* Setup outbound memory windows */
for (i = j = 0; i < 3; i++) {
struct resource *res = &hose->mem_resources[i];
/* we only care about memory windows */
if (!(res->flags & IORESOURCE_MEM))
continue;
if (j > 1) {
printk(KERN_WARNING "%s: Too many ranges\n",
port->node->full_name);
break;
}
/* Configure the resource */
if (ppc4xx_setup_one_pciex_POM(port, hose, mbase,
res->start,
res->start - hose->pci_mem_offset,
res->end + 1 - res->start,
res->flags,
j) == 0) {
j++;
/* If the resource PCI address is 0 then we have our
* ISA memory hole
*/
if (res->start == hose->pci_mem_offset)
found_isa_hole = 1;
}
}
/* Handle ISA memory hole if not already covered */
if (j <= 1 && !found_isa_hole && hose->isa_mem_size)
if (ppc4xx_setup_one_pciex_POM(port, hose, mbase,
hose->isa_mem_phys, 0,
hose->isa_mem_size, 0, j) == 0)
printk(KERN_INFO "%s: Legacy ISA memory support enabled\n",
hose->dn->full_name);
/* Configure IO, always 64K starting at 0. We hard wire it to 64K !
* Note also that it -has- to be region index 2 on this HW
*/
if (hose->io_resource.flags & IORESOURCE_IO)
ppc4xx_setup_one_pciex_POM(port, hose, mbase,
hose->io_base_phys, 0,
0x10000, IORESOURCE_IO, 2);
}
static void __init ppc4xx_configure_pciex_PIMs(struct ppc4xx_pciex_port *port,
struct pci_controller *hose,
void __iomem *mbase,
struct resource *res)
{
resource_size_t size = res->end - res->start + 1;
u64 sa;
if (port->endpoint) {
resource_size_t ep_addr = 0;
resource_size_t ep_size = 32 << 20;
/* Currently we map a fixed 64MByte window to PLB address
* 0 (SDRAM). This should probably be configurable via a dts
* property.
*/
/* Calculate window size */
sa = (0xffffffffffffffffull << ilog2(ep_size));
/* Setup BAR0 */
out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa));
out_le32(mbase + PECFG_BAR0LMPA, RES_TO_U32_LOW(sa) |
PCI_BASE_ADDRESS_MEM_TYPE_64);
/* Disable BAR1 & BAR2 */
out_le32(mbase + PECFG_BAR1MPA, 0);
out_le32(mbase + PECFG_BAR2HMPA, 0);
out_le32(mbase + PECFG_BAR2LMPA, 0);
out_le32(mbase + PECFG_PIM01SAH, RES_TO_U32_HIGH(sa));
out_le32(mbase + PECFG_PIM01SAL, RES_TO_U32_LOW(sa));
out_le32(mbase + PCI_BASE_ADDRESS_0, RES_TO_U32_LOW(ep_addr));
out_le32(mbase + PCI_BASE_ADDRESS_1, RES_TO_U32_HIGH(ep_addr));
} else {
/* Calculate window size */
sa = (0xffffffffffffffffull << ilog2(size));
if (res->flags & IORESOURCE_PREFETCH)
sa |= 0x8;
out_le32(mbase + PECFG_BAR0HMPA, RES_TO_U32_HIGH(sa));
out_le32(mbase + PECFG_BAR0LMPA, RES_TO_U32_LOW(sa));
/* The setup of the split looks weird to me ... let's see
* if it works
*/
out_le32(mbase + PECFG_PIM0LAL, 0x00000000);
out_le32(mbase + PECFG_PIM0LAH, 0x00000000);
out_le32(mbase + PECFG_PIM1LAL, 0x00000000);
out_le32(mbase + PECFG_PIM1LAH, 0x00000000);
out_le32(mbase + PECFG_PIM01SAH, 0xffff0000);
out_le32(mbase + PECFG_PIM01SAL, 0x00000000);
out_le32(mbase + PCI_BASE_ADDRESS_0, RES_TO_U32_LOW(res->start));
out_le32(mbase + PCI_BASE_ADDRESS_1, RES_TO_U32_HIGH(res->start));
}
/* Enable inbound mapping */
out_le32(mbase + PECFG_PIMEN, 0x1);
/* Enable I/O, Mem, and Busmaster cycles */
out_le16(mbase + PCI_COMMAND,
in_le16(mbase + PCI_COMMAND) |
PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
}
static void __init ppc4xx_pciex_port_setup_hose(struct ppc4xx_pciex_port *port)
{
struct resource dma_window;
struct pci_controller *hose = NULL;
const int *bus_range;
int primary = 0, busses;
void __iomem *mbase = NULL, *cfg_data = NULL;
const u32 *pval;
u32 val;
/* Check if primary bridge */
if (of_get_property(port->node, "primary", NULL))
primary = 1;
/* Get bus range if any */
bus_range = of_get_property(port->node, "bus-range", NULL);
/* Allocate the host controller data structure */
hose = pcibios_alloc_controller(port->node);
if (!hose)
goto fail;
/* We stick the port number in "indirect_type" so the config space
* ops can retrieve the port data structure easily
*/
hose->indirect_type = port->index;
/* Get bus range */
hose->first_busno = bus_range ? bus_range[0] : 0x0;
hose->last_busno = bus_range ? bus_range[1] : 0xff;
/* Because of how big mapping the config space is (1M per bus), we
* limit how many busses we support. In the long run, we could replace
* that with something akin to kmap_atomic instead. We set aside 1 bus
* for the host itself too.
*/
busses = hose->last_busno - hose->first_busno; /* This is off by 1 */
if (busses > MAX_PCIE_BUS_MAPPED) {
busses = MAX_PCIE_BUS_MAPPED;
hose->last_busno = hose->first_busno + busses;
}
if (!port->endpoint) {
/* Only map the external config space in cfg_data for
* PCIe root-complexes. External space is 1M per bus
*/
cfg_data = ioremap(port->cfg_space.start +
(hose->first_busno + 1) * 0x100000,
busses * 0x100000);
if (cfg_data == NULL) {
printk(KERN_ERR "%s: Can't map external config space !",
port->node->full_name);
goto fail;
}
hose->cfg_data = cfg_data;
}
/* Always map the host config space in cfg_addr.
* Internal space is 4K
*/
mbase = ioremap(port->cfg_space.start + 0x10000000, 0x1000);
if (mbase == NULL) {
printk(KERN_ERR "%s: Can't map internal config space !",
port->node->full_name);
goto fail;
}
hose->cfg_addr = mbase;
pr_debug("PCIE %s, bus %d..%d\n", port->node->full_name,
hose->first_busno, hose->last_busno);
pr_debug(" config space mapped at: root @0x%p, other @0x%p\n",
hose->cfg_addr, hose->cfg_data);
/* Setup config space */
hose->ops = &ppc4xx_pciex_pci_ops;
port->hose = hose;
mbase = (void __iomem *)hose->cfg_addr;
if (!port->endpoint) {
/*
* Set bus numbers on our root port
*/
out_8(mbase + PCI_PRIMARY_BUS, hose->first_busno);
out_8(mbase + PCI_SECONDARY_BUS, hose->first_busno + 1);
out_8(mbase + PCI_SUBORDINATE_BUS, hose->last_busno);
}
/*
* OMRs are already reset, also disable PIMs
*/
out_le32(mbase + PECFG_PIMEN, 0);
/* Parse outbound mapping resources */
pci_process_bridge_OF_ranges(hose, port->node, primary);
/* Parse inbound mapping resources */
if (ppc4xx_parse_dma_ranges(hose, mbase, &dma_window) != 0)
goto fail;
/* Configure outbound ranges POMs */
ppc4xx_configure_pciex_POMs(port, hose, mbase);
/* Configure inbound ranges PIMs */
ppc4xx_configure_pciex_PIMs(port, hose, mbase, &dma_window);
/* The root complex doesn't show up if we don't set some vendor
* and device IDs into it. The defaults below are the same bogus
* one that the initial code in arch/ppc had. This can be
* overwritten by setting the "vendor-id/device-id" properties
* in the pciex node.
*/
/* Get the (optional) vendor-/device-id from the device-tree */
pval = of_get_property(port->node, "vendor-id", NULL);
if (pval) {
val = *pval;
} else {
if (!port->endpoint)
val = 0xaaa0 + port->index;
else
val = 0xeee0 + port->index;
}
out_le16(mbase + 0x200, val);
pval = of_get_property(port->node, "device-id", NULL);
if (pval) {
val = *pval;
} else {
if (!port->endpoint)
val = 0xbed0 + port->index;
else
val = 0xfed0 + port->index;
}
out_le16(mbase + 0x202, val);
if (!port->endpoint) {
/* Set Class Code to PCI-PCI bridge and Revision Id to 1 */
out_le32(mbase + 0x208, 0x06040001);
printk(KERN_INFO "PCIE%d: successfully set as root-complex\n",
port->index);
} else {
/* Set Class Code to Processor/PPC */
out_le32(mbase + 0x208, 0x0b200001);
printk(KERN_INFO "PCIE%d: successfully set as endpoint\n",
port->index);
}
return;
fail:
if (hose)
pcibios_free_controller(hose);
if (cfg_data)
iounmap(cfg_data);
if (mbase)
iounmap(mbase);
}
static void __init ppc4xx_probe_pciex_bridge(struct device_node *np)
{
struct ppc4xx_pciex_port *port;
const u32 *pval;
int portno;
unsigned int dcrs;
const char *val;
/* First, proceed to core initialization as we assume there's
* only one PCIe core in the system
*/
if (ppc4xx_pciex_check_core_init(np))
return;
/* Get the port number from the device-tree */
pval = of_get_property(np, "port", NULL);
if (pval == NULL) {
printk(KERN_ERR "PCIE: Can't find port number for %s\n",
np->full_name);
return;
}
portno = *pval;
if (portno >= ppc4xx_pciex_port_count) {
printk(KERN_ERR "PCIE: port number out of range for %s\n",
np->full_name);
return;
}
port = &ppc4xx_pciex_ports[portno];
port->index = portno;
/*
* Check if device is enabled
*/
if (!of_device_is_available(np)) {
printk(KERN_INFO "PCIE%d: Port disabled via device-tree\n", port->index);
return;
}
port->node = of_node_get(np);
pval = of_get_property(np, "sdr-base", NULL);
if (pval == NULL) {
printk(KERN_ERR "PCIE: missing sdr-base for %s\n",
np->full_name);
return;
}
port->sdr_base = *pval;
/* Check if device_type property is set to "pci" or "pci-endpoint".
* Resulting from this setup this PCIe port will be configured
* as root-complex or as endpoint.
*/
val = of_get_property(port->node, "device_type", NULL);
if (!strcmp(val, "pci-endpoint")) {
port->endpoint = 1;
} else if (!strcmp(val, "pci")) {
port->endpoint = 0;
} else {
printk(KERN_ERR "PCIE: missing or incorrect device_type for %s\n",
np->full_name);
return;
}
/* Fetch config space registers address */
if (of_address_to_resource(np, 0, &port->cfg_space)) {
printk(KERN_ERR "%s: Can't get PCI-E config space !",
np->full_name);
return;
}
/* Fetch host bridge internal registers address */
if (of_address_to_resource(np, 1, &port->utl_regs)) {
printk(KERN_ERR "%s: Can't get UTL register base !",
np->full_name);
return;
}
/* Map DCRs */
dcrs = dcr_resource_start(np, 0);
if (dcrs == 0) {
printk(KERN_ERR "%s: Can't get DCR register base !",
np->full_name);
return;
}
port->dcrs = dcr_map(np, dcrs, dcr_resource_len(np, 0));
/* Initialize the port specific registers */
if (ppc4xx_pciex_port_init(port)) {
printk(KERN_WARNING "PCIE%d: Port init failed\n", port->index);
return;
}
/* Setup the linux hose data structure */
ppc4xx_pciex_port_setup_hose(port);
}
#endif /* CONFIG_PPC4xx_PCI_EXPRESS */
static int __init ppc4xx_pci_find_bridges(void)
{
struct device_node *np;
ppc_pci_flags |= PPC_PCI_ENABLE_PROC_DOMAINS | PPC_PCI_COMPAT_DOMAIN_0;
#ifdef CONFIG_PPC4xx_PCI_EXPRESS
for_each_compatible_node(np, NULL, "ibm,plb-pciex")
ppc4xx_probe_pciex_bridge(np);
#endif
for_each_compatible_node(np, NULL, "ibm,plb-pcix")
ppc4xx_probe_pcix_bridge(np);
for_each_compatible_node(np, NULL, "ibm,plb-pci")
ppc4xx_probe_pci_bridge(np);
return 0;
}
arch_initcall(ppc4xx_pci_find_bridges);
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