Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-11-11 15:37:23 +00:00
Code Issues Projects Releases Packages Wiki Activity

pci: layerscape: add pci driver based on DM

Browse source 
There are more than five kinds of Layerscape SoCs. unfortunately,
PCIe controller of each SoC is a little bit different. In order
to avoid too many macro definitions, the patch addes a new
implementation of PCIe driver based on DM. PCIe dts node is
used to describe the difference.

Signed-off-by: Minghuan Lian <Minghuan.Lian@nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: York Sun <york.sun@nxp.com>
This commit is contained in:
Minghuan Lian 2016-12-13 14:54:17 +08:00 committed by York Sun
parent a7294aba08
commit 80afc63fc3
4 changed files with 754 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
drivers/pci/Kconfig
View file

@ -71,4 +71,12 @@ config PCI_XILINX
Enable support for the Xilinx AXI bridge for PCI express, an IP block Enable support for the Xilinx AXI bridge for PCI express, an IP block
which can be used on some generations of Xilinx FPGAs. which can be used on some generations of Xilinx FPGAs.
config PCIE_LAYERSCAPE
bool "Layerscape PCIe support"
depends on DM_PCI
help
Support Layerscape PCIe. The Layerscape SoC may have one or several
PCIe controllers. The PCIe may works in RC or EP mode according to
RCW[HOST_AGT_PEX] setting.
endif endif

540
drivers/pci/pcie_layerscape.c
View file

@ -11,6 +11,7 @@
#include <asm/io.h> #include <asm/io.h>
#include <errno.h> #include <errno.h>
#include <malloc.h> #include <malloc.h>
#include <dm.h>
#ifndef CONFIG_LS102XA #ifndef CONFIG_LS102XA
#include <asm/arch/fdt.h> #include <asm/arch/fdt.h>
#include <asm/arch/soc.h> #include <asm/arch/soc.h>
@ -19,6 +20,9 @@
#endif #endif
#include "pcie_layerscape.h" #include "pcie_layerscape.h"
DECLARE_GLOBAL_DATA_PTR;
#ifndef CONFIG_DM_PCI
#ifdef CONFIG_LS102XA #ifdef CONFIG_LS102XA
/* PEX1/2 Misc Ports Status Register */ /* PEX1/2 Misc Ports Status Register */
#define LTSSM_STATE_SHIFT 20 #define LTSSM_STATE_SHIFT 20
@ -506,3 +510,539 @@ void pci_init_board(void)
{ {
ls_pcie_init_board(0); ls_pcie_init_board(0);
} }
#else
LIST_HEAD(ls_pcie_list);
static unsigned int dbi_readl(struct ls_pcie *pcie, unsigned int offset)
{
return in_le32(pcie->dbi + offset);
}
static void dbi_writel(struct ls_pcie *pcie, unsigned int value,
unsigned int offset)
{
out_le32(pcie->dbi + offset, value);
}
static unsigned int ctrl_readl(struct ls_pcie *pcie, unsigned int offset)
{
if (pcie->big_endian)
return in_be32(pcie->ctrl + offset);
else
return in_le32(pcie->ctrl + offset);
}
static void ctrl_writel(struct ls_pcie *pcie, unsigned int value,
unsigned int offset)
{
if (pcie->big_endian)
out_be32(pcie->ctrl + offset, value);
else
out_le32(pcie->ctrl + offset, value);
}
static int ls_pcie_ltssm(struct ls_pcie *pcie)
{
u32 state;
uint svr;
svr = get_svr();
if (((svr >> SVR_VAR_PER_SHIFT) & SVR_LS102XA_MASK) == SVR_LS102XA) {
state = ctrl_readl(pcie, LS1021_PEXMSCPORTSR(pcie->idx));
state = (state >> LS1021_LTSSM_STATE_SHIFT) & LTSSM_STATE_MASK;
} else {
state = ctrl_readl(pcie, PCIE_PF_DBG) & LTSSM_STATE_MASK;
}
return state;
}
static int ls_pcie_link_up(struct ls_pcie *pcie)
{
int ltssm;
ltssm = ls_pcie_ltssm(pcie);
if (ltssm < LTSSM_PCIE_L0)
return 0;
return 1;
}
static void ls_pcie_cfg0_set_busdev(struct ls_pcie *pcie, u32 busdev)
{
dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0,
PCIE_ATU_VIEWPORT);
dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET);
}
static void ls_pcie_cfg1_set_busdev(struct ls_pcie *pcie, u32 busdev)
{
dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1,
PCIE_ATU_VIEWPORT);
dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET);
}
static void ls_pcie_atu_outbound_set(struct ls_pcie *pcie, int idx, int type,
u64 phys, u64 bus_addr, pci_size_t size)
{
dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | idx, PCIE_ATU_VIEWPORT);
dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_BASE);
dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_BASE);
dbi_writel(pcie, (u32)phys + size - 1, PCIE_ATU_LIMIT);
dbi_writel(pcie, (u32)bus_addr, PCIE_ATU_LOWER_TARGET);
dbi_writel(pcie, bus_addr >> 32, PCIE_ATU_UPPER_TARGET);
dbi_writel(pcie, type, PCIE_ATU_CR1);
dbi_writel(pcie, PCIE_ATU_ENABLE, PCIE_ATU_CR2);
}
/* Use bar match mode and MEM type as default */
static void ls_pcie_atu_inbound_set(struct ls_pcie *pcie, int idx,
int bar, u64 phys)
{
dbi_writel(pcie, PCIE_ATU_REGION_INBOUND | idx, PCIE_ATU_VIEWPORT);
dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_TARGET);
dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_TARGET);
dbi_writel(pcie, PCIE_ATU_TYPE_MEM, PCIE_ATU_CR1);
dbi_writel(pcie, PCIE_ATU_ENABLE | PCIE_ATU_BAR_MODE_ENABLE |
PCIE_ATU_BAR_NUM(bar), PCIE_ATU_CR2);
}
static void ls_pcie_dump_atu(struct ls_pcie *pcie)
{
int i;
for (i = 0; i < PCIE_ATU_REGION_NUM; i++) {
dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | i,
PCIE_ATU_VIEWPORT);
debug("iATU%d:\n", i);
debug("\tLOWER PHYS 0x%08x\n",
dbi_readl(pcie, PCIE_ATU_LOWER_BASE));
debug("\tUPPER PHYS 0x%08x\n",
dbi_readl(pcie, PCIE_ATU_UPPER_BASE));
debug("\tLOWER BUS 0x%08x\n",
dbi_readl(pcie, PCIE_ATU_LOWER_TARGET));
debug("\tUPPER BUS 0x%08x\n",
dbi_readl(pcie, PCIE_ATU_UPPER_TARGET));
debug("\tLIMIT 0x%08x\n",
readl(pcie->dbi + PCIE_ATU_LIMIT));
debug("\tCR1 0x%08x\n",
dbi_readl(pcie, PCIE_ATU_CR1));
debug("\tCR2 0x%08x\n",
dbi_readl(pcie, PCIE_ATU_CR2));
}
}
static void ls_pcie_setup_atu(struct ls_pcie *pcie)
{
struct pci_region *io, *mem, *pref;
unsigned long long offset = 0;
int idx = 0;
uint svr;
svr = get_svr();
if (((svr >> SVR_VAR_PER_SHIFT) & SVR_LS102XA_MASK) == SVR_LS102XA) {
offset = LS1021_PCIE_SPACE_OFFSET +
LS1021_PCIE_SPACE_SIZE * pcie->idx;
}
/* ATU 0 : OUTBOUND : CFG0 */
ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX0,
PCIE_ATU_TYPE_CFG0,
pcie->cfg_res.start + offset,
0,
fdt_resource_size(&pcie->cfg_res) / 2);
/* ATU 1 : OUTBOUND : CFG1 */
ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX1,
PCIE_ATU_TYPE_CFG1,
pcie->cfg_res.start + offset +
fdt_resource_size(&pcie->cfg_res) / 2,
0,
fdt_resource_size(&pcie->cfg_res) / 2);
pci_get_regions(pcie->bus, &io, &mem, &pref);
idx = PCIE_ATU_REGION_INDEX1 + 1;
if (io)
/* ATU : OUTBOUND : IO */
ls_pcie_atu_outbound_set(pcie, idx++,
PCIE_ATU_TYPE_IO,
io->phys_start + offset,
io->bus_start,
io->size);
if (mem)
/* ATU : OUTBOUND : MEM */
ls_pcie_atu_outbound_set(pcie, idx++,
PCIE_ATU_TYPE_MEM,
mem->phys_start + offset,
mem->bus_start,
mem->size);
if (pref)
/* ATU : OUTBOUND : pref */
ls_pcie_atu_outbound_set(pcie, idx++,
PCIE_ATU_TYPE_MEM,
pref->phys_start + offset,
pref->bus_start,
pref->size);
ls_pcie_dump_atu(pcie);
}
/* Return 0 if the address is valid, -errno if not valid */
static int ls_pcie_addr_valid(struct ls_pcie *pcie, pci_dev_t bdf)
{
struct udevice *bus = pcie->bus;
if (!pcie->enabled)
return -ENXIO;
if (PCI_BUS(bdf) < bus->seq)
return -EINVAL;
if ((PCI_BUS(bdf) > bus->seq) && (!ls_pcie_link_up(pcie)))
return -EINVAL;
if (PCI_BUS(bdf) <= (bus->seq + 1) && (PCI_DEV(bdf) > 0))
return -EINVAL;
return 0;
}
void *ls_pcie_conf_address(struct ls_pcie *pcie, pci_dev_t bdf,
int offset)
{
struct udevice *bus = pcie->bus;
u32 busdev;
if (PCI_BUS(bdf) == bus->seq)
return pcie->dbi + offset;
busdev = PCIE_ATU_BUS(PCI_BUS(bdf)) |
PCIE_ATU_DEV(PCI_DEV(bdf)) |
PCIE_ATU_FUNC(PCI_FUNC(bdf));
if (PCI_BUS(bdf) == bus->seq + 1) {
ls_pcie_cfg0_set_busdev(pcie, busdev);
return pcie->cfg0 + offset;
} else {
ls_pcie_cfg1_set_busdev(pcie, busdev);
return pcie->cfg1 + offset;
}
}
static int ls_pcie_read_config(struct udevice *bus, pci_dev_t bdf,
uint offset, ulong *valuep,
enum pci_size_t size)
{
struct ls_pcie *pcie = dev_get_priv(bus);
void *address;
if (ls_pcie_addr_valid(pcie, bdf)) {
*valuep = pci_get_ff(size);
return 0;
}
address = ls_pcie_conf_address(pcie, bdf, offset);
switch (size) {
case PCI_SIZE_8:
*valuep = readb(address);
return 0;
case PCI_SIZE_16:
*valuep = readw(address);
return 0;
case PCI_SIZE_32:
*valuep = readl(address);
return 0;
default:
return -EINVAL;
}
}
static int ls_pcie_write_config(struct udevice *bus, pci_dev_t bdf,
uint offset, ulong value,
enum pci_size_t size)
{
struct ls_pcie *pcie = dev_get_priv(bus);
void *address;
if (ls_pcie_addr_valid(pcie, bdf))
return 0;
address = ls_pcie_conf_address(pcie, bdf, offset);
switch (size) {
case PCI_SIZE_8:
writeb(value, address);
return 0;
case PCI_SIZE_16:
writew(value, address);
return 0;
case PCI_SIZE_32:
writel(value, address);
return 0;
default:
return -EINVAL;
}
}
/* Clear multi-function bit */
static void ls_pcie_clear_multifunction(struct ls_pcie *pcie)
{
writeb(PCI_HEADER_TYPE_BRIDGE, pcie->dbi + PCI_HEADER_TYPE);
}
/* Fix class value */
static void ls_pcie_fix_class(struct ls_pcie *pcie)
{
writew(PCI_CLASS_BRIDGE_PCI, pcie->dbi + PCI_CLASS_DEVICE);
}
/* Drop MSG TLP except for Vendor MSG */
static void ls_pcie_drop_msg_tlp(struct ls_pcie *pcie)
{
u32 val;
val = dbi_readl(pcie, PCIE_STRFMR1);
val &= 0xDFFFFFFF;
dbi_writel(pcie, val, PCIE_STRFMR1);
}
/* Disable all bars in RC mode */
static void ls_pcie_disable_bars(struct ls_pcie *pcie)
{
u32 sriov;
sriov = in_le32(pcie->dbi + PCIE_SRIOV);
/*
* TODO: For PCIe controller with SRIOV, the method to disable bars
* is different and more complex, so will add later.
*/
if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV)
return;
dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_0);
dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_1);
dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_ROM_ADDRESS1);
}
static void ls_pcie_setup_ctrl(struct ls_pcie *pcie)
{
ls_pcie_setup_atu(pcie);
dbi_writel(pcie, 1, PCIE_DBI_RO_WR_EN);
ls_pcie_fix_class(pcie);
ls_pcie_clear_multifunction(pcie);
ls_pcie_drop_msg_tlp(pcie);
dbi_writel(pcie, 0, PCIE_DBI_RO_WR_EN);
ls_pcie_disable_bars(pcie);
}
static void ls_pcie_ep_setup_atu(struct ls_pcie *pcie)
{
u64 phys = CONFIG_SYS_PCI_EP_MEMORY_BASE;
/* ATU 0 : INBOUND : map BAR0 */
ls_pcie_atu_inbound_set(pcie, 0, 0, phys);
/* ATU 1 : INBOUND : map BAR1 */
phys += PCIE_BAR1_SIZE;
ls_pcie_atu_inbound_set(pcie, 1, 1, phys);
/* ATU 2 : INBOUND : map BAR2 */
phys += PCIE_BAR2_SIZE;
ls_pcie_atu_inbound_set(pcie, 2, 2, phys);
/* ATU 3 : INBOUND : map BAR4 */
phys = CONFIG_SYS_PCI_EP_MEMORY_BASE + PCIE_BAR4_SIZE;
ls_pcie_atu_inbound_set(pcie, 3, 4, phys);
/* ATU 0 : OUTBOUND : map MEM */
ls_pcie_atu_outbound_set(pcie, 0,
PCIE_ATU_TYPE_MEM,
pcie->cfg_res.start,
0,
CONFIG_SYS_PCI_MEMORY_SIZE);
}
/* BAR0 and BAR1 are 32bit BAR2 and BAR4 are 64bit */
static void ls_pcie_ep_setup_bar(void *bar_base, int bar, u32 size)
{
/* The least inbound window is 4KiB */
if (size < 4 * 1024)
return;
switch (bar) {
case 0:
writel(size - 1, bar_base + PCI_BASE_ADDRESS_0);
break;
case 1:
writel(size - 1, bar_base + PCI_BASE_ADDRESS_1);
break;
case 2:
writel(size - 1, bar_base + PCI_BASE_ADDRESS_2);
writel(0, bar_base + PCI_BASE_ADDRESS_3);
break;
case 4:
writel(size - 1, bar_base + PCI_BASE_ADDRESS_4);
writel(0, bar_base + PCI_BASE_ADDRESS_5);
break;
default:
break;
}
}
static void ls_pcie_ep_setup_bars(void *bar_base)
{
/* BAR0 - 32bit - 4K configuration */
ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE);
/* BAR1 - 32bit - 8K MSIX*/
ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE);
/* BAR2 - 64bit - 4K MEM desciptor */
ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE);
/* BAR4 - 64bit - 1M MEM*/
ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE);
}
static void ls_pcie_setup_ep(struct ls_pcie *pcie)
{
u32 sriov;
sriov = readl(pcie->dbi + PCIE_SRIOV);
if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) {
int pf, vf;
for (pf = 0; pf < PCIE_PF_NUM; pf++) {
for (vf = 0; vf <= PCIE_VF_NUM; vf++) {
ctrl_writel(pcie, PCIE_LCTRL0_VAL(pf, vf),
PCIE_PF_VF_CTRL);
ls_pcie_ep_setup_bars(pcie->dbi);
ls_pcie_ep_setup_atu(pcie);
}
}
/* Disable CFG2 */
ctrl_writel(pcie, 0, PCIE_PF_VF_CTRL);
} else {
ls_pcie_ep_setup_bars(pcie->dbi + PCIE_NO_SRIOV_BAR_BASE);
ls_pcie_ep_setup_atu(pcie);
}
}
static int ls_pcie_probe(struct udevice *dev)
{
struct ls_pcie *pcie = dev_get_priv(dev);
const void *fdt = gd->fdt_blob;
int node = dev->of_offset;
u8 header_type;
u16 link_sta;
bool ep_mode;
int ret;
pcie->bus = dev;
ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
"dbi", &pcie->dbi_res);
if (ret) {
printf("ls-pcie: resource \"dbi\" not found\n");
return ret;
}
pcie->idx = (pcie->dbi_res.start - PCIE_SYS_BASE_ADDR) / PCIE_CCSR_SIZE;
list_add(&pcie->list, &ls_pcie_list);
pcie->enabled = is_serdes_configured(PCIE_SRDS_PRTCL(pcie->idx));
if (!pcie->enabled) {
printf("PCIe%d: %s disabled\n", pcie->idx, dev->name);
return 0;
}
pcie->dbi = map_physmem(pcie->dbi_res.start,
fdt_resource_size(&pcie->dbi_res),
MAP_NOCACHE);
ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
"lut", &pcie->lut_res);
if (!ret)
pcie->lut = map_physmem(pcie->lut_res.start,
fdt_resource_size(&pcie->lut_res),
MAP_NOCACHE);
ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
"ctrl", &pcie->ctrl_res);
if (!ret)
pcie->ctrl = map_physmem(pcie->ctrl_res.start,
fdt_resource_size(&pcie->ctrl_res),
MAP_NOCACHE);
if (!pcie->ctrl)
pcie->ctrl = pcie->lut;
if (!pcie->ctrl) {
printf("%s: NOT find CTRL\n", dev->name);
return -1;
}
ret = fdt_get_named_resource(fdt, node, "reg", "reg-names",
"config", &pcie->cfg_res);
if (ret) {
printf("%s: resource \"config\" not found\n", dev->name);
return ret;
}
pcie->cfg0 = map_physmem(pcie->cfg_res.start,
fdt_resource_size(&pcie->cfg_res),
MAP_NOCACHE);
pcie->cfg1 = pcie->cfg0 + fdt_resource_size(&pcie->cfg_res) / 2;
pcie->big_endian = fdtdec_get_bool(fdt, node, "big-endian");
debug("%s dbi:%lx lut:%lx ctrl:0x%lx cfg0:0x%lx, big-endian:%d\n",
dev->name, (unsigned long)pcie->dbi, (unsigned long)pcie->lut,
(unsigned long)pcie->ctrl, (unsigned long)pcie->cfg0,
pcie->big_endian);
header_type = readb(pcie->dbi + PCI_HEADER_TYPE);
ep_mode = (header_type & 0x7f) == PCI_HEADER_TYPE_NORMAL;
printf("PCIe%u: %s %s", pcie->idx, dev->name,
ep_mode ? "Endpoint" : "Root Complex");
if (ep_mode)
ls_pcie_setup_ep(pcie);
else
ls_pcie_setup_ctrl(pcie);
if (!ls_pcie_link_up(pcie)) {
/* Let the user know there's no PCIe link */
printf(": no link\n");
return 0;
}
/* Print the negotiated PCIe link width */
link_sta = readw(pcie->dbi + PCIE_LINK_STA);
printf(": x%d gen%d\n", (link_sta & PCIE_LINK_WIDTH_MASK) >> 4,
link_sta & PCIE_LINK_SPEED_MASK);
return 0;
}
static const struct dm_pci_ops ls_pcie_ops = {
.read_config = ls_pcie_read_config,
.write_config = ls_pcie_write_config,
};
static const struct udevice_id ls_pcie_ids[] = {
{ .compatible = "fsl,ls-pcie" },
{ }
};
U_BOOT_DRIVER(pci_layerscape) = {
.name = "pci_layerscape",
.id = UCLASS_PCI,
.of_match = ls_pcie_ids,
.ops = &ls_pcie_ops,
.probe = ls_pcie_probe,
.priv_auto_alloc_size = sizeof(struct ls_pcie),
};
#endif /* CONFIG_DM_PCI */

56
drivers/pci/pcie_layerscape.h
View file

@ -86,6 +86,7 @@
#define PCIE_BAR2_SIZE (4 * 1024) /* 4K */ #define PCIE_BAR2_SIZE (4 * 1024) /* 4K */
#define PCIE_BAR4_SIZE (1 * 1024 * 1024) /* 1M */ #define PCIE_BAR4_SIZE (1 * 1024 * 1024) /* 1M */
#ifndef CONFIG_DM_PCI
struct ls_pcie { struct ls_pcie {
int idx; int idx;
void __iomem *dbi; void __iomem *dbi;
@ -132,4 +133,59 @@ struct ls_pcie_info {
x.pci_num = num; \ x.pci_num = num; \
} }
#else /* CONFIG_DM_PCI */
#include <dm.h>
/* LUT registers */
#define PCIE_LUT_UDR(n) (0x800 + (n) * 8)
#define PCIE_LUT_LDR(n) (0x804 + (n) * 8)
#define PCIE_LUT_ENABLE (1 << 31)
#define PCIE_LUT_ENTRY_COUNT 32
/* PF Controll registers */
#define PCIE_PF_VF_CTRL 0x7F8
#define PCIE_PF_DBG 0x7FC
#define PCIE_SRDS_PRTCL(idx) (PCIE1 + (idx))
#define PCIE_SYS_BASE_ADDR 0x3400000
#define PCIE_CCSR_SIZE 0x0100000
/* CS2 */
#define PCIE_CS2_OFFSET 0x1000 /* For PCIe without SR-IOV */
#define SVR_LS102XA 0
#define SVR_VAR_PER_SHIFT 8
#define SVR_LS102XA_MASK 0x700
/* LS1021a PCIE space */
#define LS1021_PCIE_SPACE_OFFSET 0x4000000000ULL
#define LS1021_PCIE_SPACE_SIZE 0x0800000000ULL
/* LS1021a PEX1/2 Misc Ports Status Register */
#define LS1021_PEXMSCPORTSR(pex_idx) (0x94 + (pex_idx) * 4)
#define LS1021_LTSSM_STATE_SHIFT 20
struct ls_pcie {
int idx;
struct list_head list;
struct udevice *bus;
struct fdt_resource dbi_res;
struct fdt_resource lut_res;
struct fdt_resource ctrl_res;
struct fdt_resource cfg_res;
void __iomem *dbi;
void __iomem *lut;
void __iomem *ctrl;
void __iomem *cfg0;
void __iomem *cfg1;
bool big_endian;
bool enabled;
int next_lut_index;
struct pci_controller hose;
};
extern struct list_head ls_pcie_list;
#endif /* CONFIG_DM_PCI */
#endif /* _PCIE_LAYERSCAPE_H_ */ #endif /* _PCIE_LAYERSCAPE_H_ */

150
drivers/pci/pcie_layerscape_fixup.c
View file

@ -37,7 +37,11 @@ static int ls_pcie_next_streamid(void)
return next_stream_id++; return next_stream_id++;
} }
#endif
#ifndef CONFIG_DM_PCI
#ifdef CONFIG_FSL_LSCH3
/* /*
* Program a single LUT entry * Program a single LUT entry
*/ */
@ -197,6 +201,152 @@ void ft_pci_setup(void *blob, bd_t *bd)
#endif #endif
} }
#else /* CONFIG_DM_PCI */
#ifdef CONFIG_FSL_LSCH3
static void lut_writel(struct ls_pcie *pcie, unsigned int value,
unsigned int offset)
{
if (pcie->big_endian)
out_be32(pcie->lut + offset, value);
else
out_le32(pcie->lut + offset, value);
}
/*
* Program a single LUT entry
*/
static void ls_pcie_lut_set_mapping(struct ls_pcie *pcie, int index, u32 devid,
u32 streamid)
{
/* leave mask as all zeroes, want to match all bits */
lut_writel(pcie, devid << 16, PCIE_LUT_UDR(index));
lut_writel(pcie, streamid | PCIE_LUT_ENABLE, PCIE_LUT_LDR(index));
}
/*
* An msi-map is a property to be added to the pci controller
* node. It is a table, where each entry consists of 4 fields
* e.g.:
*
* msi-map = <[devid] [phandle-to-msi-ctrl] [stream-id] [count]
* [devid] [phandle-to-msi-ctrl] [stream-id] [count]>;
*/
static void fdt_pcie_set_msi_map_entry(void *blob, struct ls_pcie *pcie,
u32 devid, u32 streamid)
{
u32 *prop;
u32 phandle;
int nodeoffset;
/* find pci controller node */
nodeoffset = fdt_node_offset_by_compat_reg(blob, "fsl,ls-pcie",
pcie->dbi_res.start);
if (nodeoffset < 0) {
#ifdef FSL_PCIE_COMPAT /* Compatible with older version of dts node */
nodeoffset = fdt_node_offset_by_compat_reg(blob,
FSL_PCIE_COMPAT, pcie->dbi_res.start);
if (nodeoffset < 0)
return;
#else
return;
#endif
}
/* get phandle to MSI controller */
prop = (u32 *)fdt_getprop(blob, nodeoffset, "msi-parent", 0);
if (prop == NULL) {
debug("\n%s: ERROR: missing msi-parent: PCIe%d\n",
__func__, pcie->idx);
return;
}
phandle = fdt32_to_cpu(*prop);
/* set one msi-map row */
fdt_appendprop_u32(blob, nodeoffset, "msi-map", devid);
fdt_appendprop_u32(blob, nodeoffset, "msi-map", phandle);
fdt_appendprop_u32(blob, nodeoffset, "msi-map", streamid);
fdt_appendprop_u32(blob, nodeoffset, "msi-map", 1);
}
static void fdt_fixup_pcie(void *blob)
{
struct udevice *dev, *bus;
struct ls_pcie *pcie;
int streamid;
int index;
pci_dev_t bdf;
/* Scan all known buses */
for (pci_find_first_device(&dev);
dev;
pci_find_next_device(&dev)) {
for (bus = dev; device_is_on_pci_bus(bus);)
bus = bus->parent;
pcie = dev_get_priv(bus);
streamid = ls_pcie_next_streamid();
if (streamid < 0) {
debug("ERROR: no stream ids free\n");
continue;
}
index = ls_pcie_next_lut_index(pcie);
if (index < 0) {
debug("ERROR: no LUT indexes free\n");
continue;
}
/* the DT fixup must be relative to the hose first_busno */
bdf = dm_pci_get_bdf(dev) - PCI_BDF(bus->seq, 0, 0);
/* map PCI b.d.f to streamID in LUT */
ls_pcie_lut_set_mapping(pcie, index, bdf >> 8,
streamid);
/* update msi-map in device tree */
fdt_pcie_set_msi_map_entry(blob, pcie, bdf >> 8,
streamid);
}
}
#endif
static void ft_pcie_ls_setup(void *blob, struct ls_pcie *pcie)
{
int off;
off = fdt_node_offset_by_compat_reg(blob, "fsl,ls-pcie",
pcie->dbi_res.start);
if (off < 0) {
#ifdef FSL_PCIE_COMPAT /* Compatible with older version of dts node */
off = fdt_node_offset_by_compat_reg(blob,
FSL_PCIE_COMPAT,
pcie->dbi_res.start);
if (off < 0)
return;
#else
return;
#endif
}
if (pcie->enabled)
fdt_set_node_status(blob, off, FDT_STATUS_OKAY, 0);
else
fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0);
}
/* Fixup Kernel DT for PCIe */
void ft_pci_setup(void *blob, bd_t *bd)
{
struct ls_pcie *pcie;
list_for_each_entry(pcie, &ls_pcie_list, list)
ft_pcie_ls_setup(blob, pcie);
#ifdef CONFIG_FSL_LSCH3
fdt_fixup_pcie(blob);
#endif
}
#endif /* CONFIG_DM_PCI */
#else /* !CONFIG_OF_BOARD_SETUP */ #else /* !CONFIG_OF_BOARD_SETUP */
void ft_pci_setup(void *blob, bd_t *bd) void ft_pci_setup(void *blob, bd_t *bd)
{ {