mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-26 21:13:48 +00:00
8e221b4a1c
Stop to initialize the PCIe controller if it's disabled by RCW.
Fixes: 118e58e26e
("pci: layerscape: Split the EP and RC driver")
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
341 lines
9 KiB
C
341 lines
9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2020 NXP
|
|
* Layerscape PCIe EP driver
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/arch/fsl_serdes.h>
|
|
#include <dm.h>
|
|
#include <asm/global_data.h>
|
|
#include <dm/devres.h>
|
|
#include <errno.h>
|
|
#include <pci_ep.h>
|
|
#include <asm/io.h>
|
|
#include <linux/sizes.h>
|
|
#include <linux/log2.h>
|
|
#include "pcie_layerscape.h"
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static void ls_pcie_ep_enable_cfg(struct ls_pcie_ep *pcie_ep)
|
|
{
|
|
struct ls_pcie *pcie = pcie_ep->pcie;
|
|
u32 config;
|
|
|
|
config = ctrl_readl(pcie, PCIE_PF_CONFIG);
|
|
config |= PCIE_CONFIG_READY;
|
|
ctrl_writel(pcie, config, PCIE_PF_CONFIG);
|
|
}
|
|
|
|
static int ls_ep_set_bar(struct udevice *dev, uint fn, struct pci_bar *ep_bar)
|
|
{
|
|
struct ls_pcie_ep *pcie_ep = dev_get_priv(dev);
|
|
struct ls_pcie *pcie = pcie_ep->pcie;
|
|
dma_addr_t bar_phys = ep_bar->phys_addr;
|
|
enum pci_barno bar = ep_bar->barno;
|
|
u32 reg = PCI_BASE_ADDRESS_0 + (4 * bar);
|
|
int flags = ep_bar->flags;
|
|
int type, idx;
|
|
u64 size;
|
|
|
|
idx = bar;
|
|
/* BAR size is 2^(aperture + 11) */
|
|
size = max_t(size_t, ep_bar->size, FSL_PCIE_EP_MIN_APERTURE);
|
|
|
|
if (!(flags & PCI_BASE_ADDRESS_SPACE))
|
|
type = PCIE_ATU_TYPE_MEM;
|
|
else
|
|
type = PCIE_ATU_TYPE_IO;
|
|
|
|
ls_pcie_atu_inbound_set(pcie, fn, 0, type, idx, bar, bar_phys);
|
|
|
|
dbi_writel(pcie, lower_32_bits(size - 1), reg + PCIE_NO_SRIOV_BAR_BASE);
|
|
dbi_writel(pcie, flags, reg);
|
|
|
|
if (flags & PCI_BASE_ADDRESS_MEM_TYPE_64) {
|
|
dbi_writel(pcie, upper_32_bits(size - 1),
|
|
reg + 4 + PCIE_NO_SRIOV_BAR_BASE);
|
|
dbi_writel(pcie, 0, reg + 4);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct pci_ep_ops ls_pcie_ep_ops = {
|
|
.set_bar = ls_ep_set_bar,
|
|
};
|
|
|
|
static void ls_pcie_ep_setup_atu(struct ls_pcie_ep *pcie_ep, u32 pf)
|
|
{
|
|
struct ls_pcie *pcie = pcie_ep->pcie;
|
|
u32 vf_flag = 0;
|
|
u64 phys = 0;
|
|
|
|
phys = CONFIG_SYS_PCI_EP_MEMORY_BASE + pf * SZ_64M;
|
|
|
|
phys = ALIGN(phys, PCIE_BAR0_SIZE);
|
|
/* ATU 0 : INBOUND : map BAR0 */
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
0 + pf * BAR_NUM, 0, phys);
|
|
/* ATU 1 : INBOUND : map BAR1 */
|
|
phys = ALIGN(phys + PCIE_BAR0_SIZE, PCIE_BAR1_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
1 + pf * BAR_NUM, 1, phys);
|
|
/* ATU 2 : INBOUND : map BAR2 */
|
|
phys = ALIGN(phys + PCIE_BAR1_SIZE, PCIE_BAR2_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
2 + pf * BAR_NUM, 2, phys);
|
|
/* ATU 3 : INBOUND : map BAR2 */
|
|
phys = ALIGN(phys + PCIE_BAR2_SIZE, PCIE_BAR4_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
3 + pf * BAR_NUM, 4, phys);
|
|
|
|
if (pcie_ep->sriov_flag) {
|
|
vf_flag = 1;
|
|
/* ATU 4 : INBOUND : map BAR0 */
|
|
phys = ALIGN(phys + PCIE_BAR4_SIZE, PCIE_BAR0_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
4 + pf * BAR_NUM, 0, phys);
|
|
/* ATU 5 : INBOUND : map BAR1 */
|
|
phys = ALIGN(phys + PCIE_BAR0_SIZE * PCIE_VF_NUM,
|
|
PCIE_BAR1_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
5 + pf * BAR_NUM, 1, phys);
|
|
/* ATU 6 : INBOUND : map BAR2 */
|
|
phys = ALIGN(phys + PCIE_BAR1_SIZE * PCIE_VF_NUM,
|
|
PCIE_BAR2_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
6 + pf * BAR_NUM, 2, phys);
|
|
/* ATU 7 : INBOUND : map BAR4 */
|
|
phys = ALIGN(phys + PCIE_BAR2_SIZE * PCIE_VF_NUM,
|
|
PCIE_BAR4_SIZE);
|
|
ls_pcie_atu_inbound_set(pcie, pf, vf_flag, PCIE_ATU_TYPE_MEM,
|
|
7 + pf * BAR_NUM, 4, phys);
|
|
}
|
|
|
|
/* ATU: OUTBOUND : map MEM */
|
|
ls_pcie_atu_outbound_set(pcie, pf, PCIE_ATU_TYPE_MEM,
|
|
(u64)pcie_ep->addr_res.start +
|
|
pf * CONFIG_SYS_PCI_MEMORY_SIZE,
|
|
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)
|
|
{
|
|
u32 mask;
|
|
|
|
/* The least inbound window is 4KiB */
|
|
if (size < SZ_4K)
|
|
mask = 0;
|
|
else
|
|
mask = size - 1;
|
|
|
|
switch (bar) {
|
|
case 0:
|
|
writel(mask, bar_base + PCI_BASE_ADDRESS_0);
|
|
break;
|
|
case 1:
|
|
writel(mask, bar_base + PCI_BASE_ADDRESS_1);
|
|
break;
|
|
case 2:
|
|
writel(mask, bar_base + PCI_BASE_ADDRESS_2);
|
|
writel(0, bar_base + PCI_BASE_ADDRESS_3);
|
|
break;
|
|
case 4:
|
|
writel(mask, 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 - MEM */
|
|
ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE);
|
|
/* BAR1 - 32bit - MEM*/
|
|
ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE);
|
|
/* BAR2 - 64bit - MEM */
|
|
ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE);
|
|
/* BAR4 - 64bit - MEM */
|
|
ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE);
|
|
}
|
|
|
|
static void ls_pcie_ep_setup_vf_bars(void *bar_base)
|
|
{
|
|
/* VF BAR0 MASK register at offset 0x19c*/
|
|
bar_base += PCIE_SRIOV_VFBAR0 - PCI_BASE_ADDRESS_0;
|
|
|
|
/* VF-BAR0 - 32bit - MEM */
|
|
ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE);
|
|
/* VF-BAR1 - 32bit - MEM*/
|
|
ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE);
|
|
/* VF-BAR2 - 64bit - MEM */
|
|
ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE);
|
|
/* VF-BAR4 - 64bit - MEM */
|
|
ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE);
|
|
}
|
|
|
|
static void ls_pcie_setup_ep(struct ls_pcie_ep *pcie_ep)
|
|
{
|
|
u32 sriov;
|
|
u32 pf, vf;
|
|
void *bar_base = NULL;
|
|
struct ls_pcie *pcie = pcie_ep->pcie;
|
|
|
|
sriov = readl(pcie->dbi + PCIE_SRIOV);
|
|
if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) {
|
|
pcie_ep->sriov_flag = 1;
|
|
for (pf = 0; pf < PCIE_PF_NUM; pf++) {
|
|
/*
|
|
* The VF_BARn_REG register's Prefetchable and Type bit
|
|
* fields are overwritten by a write to VF's BAR Mask
|
|
* register. Before writing to the VF_BARn_MASK_REG
|
|
* register, write 0b to the PCIE_MISC_CONTROL_1_OFF
|
|
* register.
|
|
*/
|
|
writel(0, pcie->dbi + PCIE_MISC_CONTROL_1_OFF);
|
|
|
|
bar_base = pcie->dbi +
|
|
PCIE_MASK_OFFSET(pcie_ep->cfg2_flag, pf,
|
|
pcie_ep->pf1_offset);
|
|
|
|
if (pcie_ep->cfg2_flag) {
|
|
ctrl_writel(pcie,
|
|
PCIE_LCTRL0_VAL(pf, 0),
|
|
PCIE_PF_VF_CTRL);
|
|
ls_pcie_ep_setup_bars(bar_base);
|
|
|
|
for (vf = 1; vf <= PCIE_VF_NUM; vf++) {
|
|
ctrl_writel(pcie,
|
|
PCIE_LCTRL0_VAL(pf, vf),
|
|
PCIE_PF_VF_CTRL);
|
|
ls_pcie_ep_setup_vf_bars(bar_base);
|
|
}
|
|
} else {
|
|
ls_pcie_ep_setup_bars(bar_base);
|
|
ls_pcie_ep_setup_vf_bars(bar_base);
|
|
}
|
|
|
|
ls_pcie_ep_setup_atu(pcie_ep, pf);
|
|
}
|
|
|
|
if (pcie_ep->cfg2_flag) /* 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_ep, 0);
|
|
}
|
|
|
|
ls_pcie_dump_atu(pcie, PCIE_ATU_REGION_NUM_SRIOV,
|
|
PCIE_ATU_REGION_INBOUND);
|
|
|
|
ls_pcie_ep_enable_cfg(pcie_ep);
|
|
}
|
|
|
|
static int ls_pcie_ep_probe(struct udevice *dev)
|
|
{
|
|
struct ls_pcie_ep *pcie_ep = dev_get_priv(dev);
|
|
struct ls_pcie *pcie;
|
|
u16 link_sta;
|
|
int ret;
|
|
u32 svr;
|
|
|
|
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
|
|
if (!pcie)
|
|
return -ENOMEM;
|
|
|
|
pcie_ep->pcie = pcie;
|
|
|
|
pcie->dbi = (void __iomem *)devfdt_get_addr_index(dev, 0);
|
|
if (!pcie->dbi)
|
|
return -ENOMEM;
|
|
|
|
pcie->ctrl = (void __iomem *)devfdt_get_addr_index(dev, 1);
|
|
if (!pcie->ctrl)
|
|
return -ENOMEM;
|
|
|
|
ret = fdt_get_named_resource(gd->fdt_blob, dev_of_offset(dev),
|
|
"reg", "reg-names",
|
|
"addr_space", &pcie_ep->addr_res);
|
|
if (ret) {
|
|
printf("%s: resource \"addr_space\" not found\n", dev->name);
|
|
return ret;
|
|
}
|
|
|
|
pcie->idx = ((unsigned long)pcie->dbi - PCIE_SYS_BASE_ADDR) /
|
|
PCIE_CCSR_SIZE;
|
|
|
|
/* This controller is disabled by RCW */
|
|
if (!is_serdes_configured(PCIE_SRDS_PRTCL(pcie->idx)))
|
|
return 0;
|
|
|
|
pcie->big_endian = fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
|
|
"big-endian");
|
|
|
|
svr = SVR_SOC_VER(get_svr());
|
|
|
|
if (svr == SVR_LX2160A || svr == SVR_LX2162A ||
|
|
svr == SVR_LX2120A || svr == SVR_LX2080A ||
|
|
svr == SVR_LX2122A || svr == SVR_LX2082A)
|
|
pcie_ep->pf1_offset = LX2160_PCIE_PF1_OFFSET;
|
|
else
|
|
pcie_ep->pf1_offset = LS_PCIE_PF1_OFFSET;
|
|
|
|
if (svr == SVR_LS2080A || svr == SVR_LS2085A)
|
|
pcie_ep->cfg2_flag = 1;
|
|
else
|
|
pcie_ep->cfg2_flag = 0;
|
|
|
|
pcie->mode = readb(pcie->dbi + PCI_HEADER_TYPE) & 0x7f;
|
|
if (pcie->mode != PCI_HEADER_TYPE_NORMAL)
|
|
return 0;
|
|
|
|
pcie_ep->max_functions = fdtdec_get_int(gd->fdt_blob,
|
|
dev_of_offset(dev),
|
|
"max-functions", 1);
|
|
pcie_ep->num_ib_wins = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
|
|
"num-ib-windows", 8);
|
|
pcie_ep->num_ob_wins = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
|
|
"num-ob-windows", 8);
|
|
|
|
printf("PCIe%u: %s %s", PCIE_SRDS_PRTCL(pcie->idx), dev->name,
|
|
"Endpoint");
|
|
ls_pcie_setup_ep(pcie_ep);
|
|
|
|
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 int ls_pcie_ep_remove(struct udevice *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
const struct udevice_id ls_pcie_ep_ids[] = {
|
|
{ .compatible = "fsl,ls-pcie-ep" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(pci_layerscape_ep) = {
|
|
.name = "pci_layerscape_ep",
|
|
.id = UCLASS_PCI_EP,
|
|
.of_match = ls_pcie_ep_ids,
|
|
.ops = &ls_pcie_ep_ops,
|
|
.probe = ls_pcie_ep_probe,
|
|
.remove = ls_pcie_ep_remove,
|
|
.priv_auto = sizeof(struct ls_pcie_ep),
|
|
};
|