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|
/* $OpenBSD: rkpcie.c,v 1.11 2020/07/14 15:42:19 patrick Exp $ */
/*
* Copyright (c) 2018 Mark Kettenis <kettenis@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/extent.h>
#include <sys/malloc.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_clock.h>
#include <dev/ofw/ofw_gpio.h>
#include <dev/ofw/ofw_misc.h>
#include <dev/ofw/fdt.h>
#define PCIE_CLIENT_BASIC_STRAP_CONF 0x0000
#define PCIE_CLIENT_PCIE_GEN_SEL_1 (((1 << 7) << 16) | (0 << 7))
#define PCIE_CLIENT_PCIE_GEN_SEL_2 (((1 << 7) << 16) | (1 << 7))
#define PCIE_CLIENT_MODE_SELECT_RC (((1 << 6) << 16) | (1 << 6))
#define PCIE_CLIENT_LINK_TRAIN_EN (((1 << 1) << 16) | (1 << 1))
#define PCIE_CLIENT_CONF_EN (((1 << 0) << 16) | (1 << 0))
#define PCIE_CLIENT_DEBUG_OUT_0 0x003c
#define PCIE_CLIENT_DEBUG_LTSSM_MASK 0x0000001f
#define PCIE_CLIENT_DEBUG_LTSSM_L0 0x00000010
#define PCIE_CLIENT_BASIC_STATUS1 0x0048
#define PCIE_CLIENT_LINK_ST (0x3 << 20)
#define PCIE_CLIENT_LINK_ST_UP (0x3 << 20)
#define PCIE_CLIENT_INT_MASK 0x004c
#define PCIE_CLIENT_INTD_MASK (((1 << 8) << 16) | (1 << 8))
#define PCIE_CLIENT_INTD_UNMASK (((1 << 8) << 16) | (0 << 8))
#define PCIE_CLIENT_INTC_MASK (((1 << 7) << 16) | (1 << 7))
#define PCIE_CLIENT_INTC_UNMASK (((1 << 7) << 16) | (0 << 7))
#define PCIE_CLIENT_INTB_MASK (((1 << 6) << 16) | (1 << 6))
#define PCIE_CLIENT_INTB_UNMASK (((1 << 6) << 16) | (0 << 6))
#define PCIE_CLIENT_INTA_MASK (((1 << 5) << 16) | (1 << 5))
#define PCIE_CLIENT_INTA_UNMASK (((1 << 5) << 16) | (0 << 5))
#define PCIE_RC_NORMAL_BASE 0x800000
#define PCIE_LM_BASE 0x900000
#define PCIE_LM_VENDOR_ID (PCIE_LM_BASE + 0x44)
#define PCIE_LM_RCBAR (PCIE_LM_BASE + 0x300)
#define PCIE_LM_RCBARPIE (1 << 19)
#define PCIE_LM_RCBARPIS (1 << 20)
#define PCIE_RC_BASE 0xa00000
#define PCIE_RC_PCIE_LCAP (PCIE_RC_BASE + 0x0cc)
#define PCIE_RC_PCIE_LCAP_APMS_L0S (1 << 10)
#define PCIE_RC_LCSR (PCIE_RC_BASE + 0x0d0)
#define PCIE_RC_LCSR2 (PCIE_RC_BASE + 0x0f0)
#define PCIE_ATR_BASE 0xc00000
#define PCIE_ATR_OB_ADDR0(i) (PCIE_ATR_BASE + 0x000 + (i) * 0x20)
#define PCIE_ATR_OB_ADDR1(i) (PCIE_ATR_BASE + 0x004 + (i) * 0x20)
#define PCIE_ATR_OB_DESC0(i) (PCIE_ATR_BASE + 0x008 + (i) * 0x20)
#define PCIE_ATR_OB_DESC1(i) (PCIE_ATR_BASE + 0x00c + (i) * 0x20)
#define PCIE_ATR_IB_ADDR0(i) (PCIE_ATR_BASE + 0x800 + (i) * 0x8)
#define PCIE_ATR_IB_ADDR1(i) (PCIE_ATR_BASE + 0x804 + (i) * 0x8)
#define PCIE_ATR_HDR_MEM 0x2
#define PCIE_ATR_HDR_IO 0x6
#define PCIE_ATR_HDR_CFG_TYPE0 0xa
#define PCIE_ATR_HDR_CFG_TYPE1 0xb
#define PCIE_ATR_HDR_RID (1 << 23)
#define PCIE_ATR_OB_REGION0_SIZE (32 * 1024 * 1024)
#define PCIE_ATR_OB_REGION_SIZE (1 * 1024 * 1024)
#define HREAD4(sc, reg) \
(bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg)))
#define HWRITE4(sc, reg, val) \
bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val))
struct rkpcie_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
bus_space_handle_t sc_axi_ioh;
bus_addr_t sc_axi_addr;
bus_addr_t sc_apb_addr;
int sc_node;
int sc_phy_node;
struct arm64_pci_chipset sc_pc;
struct extent *sc_busex;
struct extent *sc_memex;
struct extent *sc_ioex;
int sc_bus;
};
int rkpcie_match(struct device *, void *, void *);
void rkpcie_attach(struct device *, struct device *, void *);
struct cfattach rkpcie_ca = {
sizeof (struct rkpcie_softc), rkpcie_match, rkpcie_attach
};
struct cfdriver rkpcie_cd = {
NULL, "rkpcie", DV_DULL
};
int
rkpcie_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return OF_is_compatible(faa->fa_node, "rockchip,rk3399-pcie");
}
void rkpcie_atr_init(struct rkpcie_softc *);
void rkpcie_phy_init(struct rkpcie_softc *);
void rkpcie_phy_poweron(struct rkpcie_softc *);
void rkpcie_attach_hook(struct device *, struct device *,
struct pcibus_attach_args *);
int rkpcie_bus_maxdevs(void *, int);
pcitag_t rkpcie_make_tag(void *, int, int, int);
void rkpcie_decompose_tag(void *, pcitag_t, int *, int *, int *);
int rkpcie_conf_size(void *, pcitag_t);
pcireg_t rkpcie_conf_read(void *, pcitag_t, int);
void rkpcie_conf_write(void *, pcitag_t, int, pcireg_t);
int rkpcie_intr_map(struct pci_attach_args *, pci_intr_handle_t *);
const char *rkpcie_intr_string(void *, pci_intr_handle_t);
void *rkpcie_intr_establish(void *, pci_intr_handle_t, int,
struct cpu_info *, int (*)(void *), void *, char *);
void rkpcie_intr_disestablish(void *, void *);
/*
* When link training, the LTSSM configuration state exits to L0 state upon
* success. Wait for L0 state before proceeding after link training has been
* initiated either by PCIE_CLIENT_LINK_TRAIN_EN or when triggered via
* LCSR Retrain Link bit. See PCIE 2.0 Base Specification, 4.2.6.3.6
* Configuration.Idle.
*
* Checking link up alone is not sufficient for checking for L0 state. LTSSM
* state L0 can be detected when link up is set and link training is cleared.
* See PCIE 2.0 Base Specification, 4.2.6 Link Training and Status State Rules,
* Table 4-8 Link Status Mapped to the LTSSM.
*
* However, RC doesn't set the link training bit when initially training via
* PCIE_CLIENT_LINK_TRAIN_EN. Fortunately, RC has provided a debug register
* that has the LTSSM state which can be checked instead.
*
* It is important to have reached L0 state before beginning Gen 2 training,
* as it is documented that setting the Retrain Link bit while currently
* in Recovery or Configuration states is a race condition that may result
* in missing the retraining. See See PCIE 2.0 Base Specification, 7.8.7
* Link Control Register implementation notes on Retrain Link bit.
*/
static int
rkpcie_link_training_wait(struct rkpcie_softc *sc)
{
uint32_t status;
int timo;
for (timo = 500; timo > 0; timo--) {
status = HREAD4(sc, PCIE_CLIENT_DEBUG_OUT_0);
if ((status & PCIE_CLIENT_DEBUG_LTSSM_MASK) ==
PCIE_CLIENT_DEBUG_LTSSM_L0)
break;
delay(1000);
}
return timo == 0;
}
void
rkpcie_attach(struct device *parent, struct device *self, void *aux)
{
struct rkpcie_softc *sc = (struct rkpcie_softc *)self;
struct fdt_attach_args *faa = aux;
struct pcibus_attach_args pba;
uint32_t *ep_gpio;
uint32_t bus_range[2];
uint32_t status;
uint32_t max_link_speed;
int len;
if (faa->fa_nreg < 2) {
printf(": no registers\n");
return;
}
sc->sc_iot = faa->fa_iot;
if (bus_space_map(sc->sc_iot, faa->fa_reg[1].addr,
faa->fa_reg[1].size, 0, &sc->sc_ioh)) {
printf(": can't map registers\n");
return;
}
if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr,
faa->fa_reg[0].size, 0, &sc->sc_axi_ioh)) {
printf(": can't map AXI registers\n");
bus_space_unmap(sc->sc_iot, sc->sc_ioh, faa->fa_reg[1].size);
return;
}
sc->sc_axi_addr = faa->fa_reg[0].addr;
sc->sc_apb_addr = faa->fa_reg[1].addr;
sc->sc_node = faa->fa_node;
printf("\n");
len = OF_getproplen(sc->sc_node, "ep-gpios");
if (len < 0)
return;
ep_gpio = malloc(len, M_TEMP, M_WAITOK);
OF_getpropintarray(sc->sc_node, "ep-gpios", ep_gpio, len);
max_link_speed = OF_getpropint(sc->sc_node, "max-link-speed", 1);
clock_enable_all(sc->sc_node);
gpio_controller_config_pin(ep_gpio, GPIO_CONFIG_OUTPUT);
gpio_controller_set_pin(ep_gpio, 0);
reset_assert(sc->sc_node, "aclk");
reset_assert(sc->sc_node, "pclk");
reset_assert(sc->sc_node, "pm");
rkpcie_phy_init(sc);
reset_assert(sc->sc_node, "core");
reset_assert(sc->sc_node, "mgmt");
reset_assert(sc->sc_node, "mgmt-sticky");
reset_assert(sc->sc_node, "pipe");
delay(10);
reset_deassert(sc->sc_node, "pm");
reset_deassert(sc->sc_node, "aclk");
reset_deassert(sc->sc_node, "pclk");
if (max_link_speed > 1)
status = PCIE_CLIENT_PCIE_GEN_SEL_2;
else
status = PCIE_CLIENT_PCIE_GEN_SEL_1;
/* Switch into Root Complex mode. */
HWRITE4(sc, PCIE_CLIENT_BASIC_STRAP_CONF, PCIE_CLIENT_MODE_SELECT_RC
| PCIE_CLIENT_CONF_EN | status);
rkpcie_phy_poweron(sc);
reset_deassert(sc->sc_node, "core");
reset_deassert(sc->sc_node, "mgmt");
reset_deassert(sc->sc_node, "mgmt-sticky");
reset_deassert(sc->sc_node, "pipe");
/*
* Workaround RC bug where Target Link Speed is not set by GEN_SEL_2
*/
if (max_link_speed > 1) {
status = HREAD4(sc, PCIE_RC_LCSR2);
status &= ~PCI_PCIE_LCSR2_TLS;
status |= PCI_PCIE_LCSR2_TLS_5;
HWRITE4(sc, PCIE_RC_LCSR2, status);
}
/* Start link training. */
HWRITE4(sc, PCIE_CLIENT_BASIC_STRAP_CONF, PCIE_CLIENT_LINK_TRAIN_EN);
/* XXX Advertise power limits? */
gpio_controller_set_pin(ep_gpio, 1);
free(ep_gpio, M_TEMP, len);
if (rkpcie_link_training_wait(sc)) {
printf("%s: link training timeout\n", sc->sc_dev.dv_xname);
return;
}
if (max_link_speed > 1) {
status = HREAD4(sc, PCIE_RC_LCSR);
if ((status & PCI_PCIE_LCSR_CLS) == PCI_PCIE_LCSR_CLS_2_5) {
HWRITE4(sc, PCIE_RC_LCSR, HREAD4(sc, PCIE_RC_LCSR) |
PCI_PCIE_LCSR_RL);
if (rkpcie_link_training_wait(sc)) {
/* didn't make it back to L0 state */
printf("%s: gen2 link training timeout\n",
sc->sc_dev.dv_xname);
return;
}
}
}
/*
* XXX On at least the RockPro64, many cards will panic when first
* accessing PCIe config space during bus scanning. A delay after
* link training allows some of these cards to function.
*/
delay(2000000);
/* Initialize Root Complex registers. */
HWRITE4(sc, PCIE_LM_VENDOR_ID, PCI_VENDOR_ROCKCHIP);
HWRITE4(sc, PCIE_RC_BASE + PCI_CLASS_REG,
PCI_CLASS_BRIDGE << PCI_CLASS_SHIFT |
PCI_SUBCLASS_BRIDGE_PCI << PCI_SUBCLASS_SHIFT);
HWRITE4(sc, PCIE_LM_RCBAR, PCIE_LM_RCBARPIE | PCIE_LM_RCBARPIS);
if (OF_getproplen(sc->sc_node, "aspm-no-l0s") == 0) {
status = HREAD4(sc, PCIE_RC_PCIE_LCAP);
status &= ~PCIE_RC_PCIE_LCAP_APMS_L0S;
HWRITE4(sc, PCIE_RC_PCIE_LCAP, status);
}
/* Create extents for our address spaces. */
sc->sc_busex = extent_create("pcibus", 0, 255,
M_DEVBUF, NULL, 0, EX_WAITOK | EX_FILLED);
sc->sc_memex = extent_create("pcimem", 0, (u_long)-1,
M_DEVBUF, NULL, 0, EX_WAITOK | EX_FILLED);
sc->sc_ioex = extent_create("pciio", 0, 0xffffffff,
M_DEVBUF, NULL, 0, EX_WAITOK | EX_FILLED);
/* Set up bus range. */
if (OF_getpropintarray(sc->sc_node, "bus-range", bus_range,
sizeof(bus_range)) != sizeof(bus_range) ||
bus_range[0] >= 32 || bus_range[1] >= 32) {
bus_range[0] = 0;
bus_range[1] = 31;
}
sc->sc_bus = bus_range[0];
extent_free(sc->sc_busex, bus_range[0],
bus_range[1] - bus_range[0] + 1, EX_WAITOK);
/* Configure Address Translation. */
rkpcie_atr_init(sc);
sc->sc_pc.pc_conf_v = sc;
sc->sc_pc.pc_attach_hook = rkpcie_attach_hook;
sc->sc_pc.pc_bus_maxdevs = rkpcie_bus_maxdevs;
sc->sc_pc.pc_make_tag = rkpcie_make_tag;
sc->sc_pc.pc_decompose_tag = rkpcie_decompose_tag;
sc->sc_pc.pc_conf_size = rkpcie_conf_size;
sc->sc_pc.pc_conf_read = rkpcie_conf_read;
sc->sc_pc.pc_conf_write = rkpcie_conf_write;
sc->sc_pc.pc_intr_v = sc;
sc->sc_pc.pc_intr_map = rkpcie_intr_map;
sc->sc_pc.pc_intr_map_msi = _pci_intr_map_msi;
sc->sc_pc.pc_intr_map_msix = _pci_intr_map_msix;
sc->sc_pc.pc_intr_string = rkpcie_intr_string;
sc->sc_pc.pc_intr_establish = rkpcie_intr_establish;
sc->sc_pc.pc_intr_disestablish = rkpcie_intr_disestablish;
memset(&pba, 0, sizeof(pba));
pba.pba_busname = "pci";
pba.pba_iot = faa->fa_iot;
pba.pba_memt = faa->fa_iot;
pba.pba_dmat = faa->fa_dmat;
pba.pba_pc = &sc->sc_pc;
pba.pba_busex = sc->sc_busex;
pba.pba_memex = sc->sc_memex;
pba.pba_ioex = sc->sc_ioex;
pba.pba_domain = pci_ndomains++;
pba.pba_bus = sc->sc_bus;
pba.pba_flags |= PCI_FLAGS_MSI_ENABLED;
config_found(self, &pba, NULL);
}
void
rkpcie_atr_init(struct rkpcie_softc *sc)
{
uint32_t *ranges = NULL;
struct extent *ex;
bus_addr_t addr;
bus_size_t size, offset;
uint32_t type;
int len, region;
int i;
/* Use region 0 to map PCI configuration space. */
HWRITE4(sc, PCIE_ATR_OB_ADDR0(0), 25 - 1);
HWRITE4(sc, PCIE_ATR_OB_ADDR1(0), 0);
HWRITE4(sc, PCIE_ATR_OB_DESC0(0),
PCIE_ATR_HDR_CFG_TYPE0 | PCIE_ATR_HDR_RID);
HWRITE4(sc, PCIE_ATR_OB_DESC1(0), 0);
len = OF_getproplen(sc->sc_node, "ranges");
if (len <= 0 || (len % (7 * sizeof(uint32_t))) != 0)
goto fail;
ranges = malloc(len, M_TEMP, M_WAITOK);
OF_getpropintarray(sc->sc_node, "ranges", ranges, len);
for (i = 0; i < len / sizeof(uint32_t); i += 7) {
/* Handle IO and MMIO. */
switch (ranges[i] & 0x03000000) {
case 0x01000000:
type = PCIE_ATR_HDR_IO;
ex = sc->sc_ioex;
break;
case 0x02000000:
case 0x03000000:
type = PCIE_ATR_HDR_MEM;
ex = sc->sc_memex;
break;
default:
continue;
}
/* Only support identity mappings. */
if (ranges[i + 1] != ranges[i + 3] ||
ranges[i + 2] != ranges[i + 4])
goto fail;
/* Only support mappings aligned on a region boundary. */
addr = ((uint64_t)ranges[i + 1] << 32) + ranges[i + 2];
if (addr & (PCIE_ATR_OB_REGION_SIZE - 1))
goto fail;
/* Mappings should lie between AXI and APB regions. */
size = ranges[i + 6];
if (addr < sc->sc_axi_addr + PCIE_ATR_OB_REGION0_SIZE)
goto fail;
if (addr + size > sc->sc_apb_addr)
goto fail;
offset = addr - sc->sc_axi_addr - PCIE_ATR_OB_REGION0_SIZE;
region = 1 + (offset / PCIE_ATR_OB_REGION_SIZE);
while (size > 0) {
HWRITE4(sc, PCIE_ATR_OB_ADDR0(region), 32 - 1);
HWRITE4(sc, PCIE_ATR_OB_ADDR1(region), 0);
HWRITE4(sc, PCIE_ATR_OB_DESC0(region),
type | PCIE_ATR_HDR_RID);
HWRITE4(sc, PCIE_ATR_OB_DESC1(region), 0);
extent_free(ex, addr, PCIE_ATR_OB_REGION_SIZE,
EX_WAITOK);
addr += PCIE_ATR_OB_REGION_SIZE;
size -= PCIE_ATR_OB_REGION_SIZE;
region++;
}
}
/* Passthrought inbound translations unmodified. */
HWRITE4(sc, PCIE_ATR_IB_ADDR0(2), 32 - 1);
HWRITE4(sc, PCIE_ATR_IB_ADDR1(2), 0);
free(ranges, M_TEMP, len);
return;
fail:
printf("%s: can't map ranges\n", sc->sc_dev.dv_xname);
free(ranges, M_TEMP, len);
}
void
rkpcie_attach_hook(struct device *parent, struct device *self,
struct pcibus_attach_args *pba)
{
}
int
rkpcie_bus_maxdevs(void *v, int bus)
{
struct rkpcie_softc *sc = v;
if (bus == sc->sc_bus || bus == sc->sc_bus + 1)
return 1;
return 32;
}
pcitag_t
rkpcie_make_tag(void *v, int bus, int device, int function)
{
/* Return ECAM address. */
return ((bus << 20) | (device << 15) | (function << 12));
}
void
rkpcie_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, int *fp)
{
if (bp != NULL)
*bp = (tag >> 20) & 0xff;
if (dp != NULL)
*dp = (tag >> 15) & 0x1f;
if (fp != NULL)
*fp = (tag >> 12) & 0x7;
}
int
rkpcie_conf_size(void *v, pcitag_t tag)
{
return PCIE_CONFIG_SPACE_SIZE;
}
pcireg_t
rkpcie_conf_read(void *v, pcitag_t tag, int reg)
{
struct rkpcie_softc *sc = v;
int bus, dev, fn;
rkpcie_decompose_tag(sc, tag, &bus, &dev, &fn);
if (bus == sc->sc_bus) {
KASSERT(dev == 0);
return HREAD4(sc, PCIE_RC_NORMAL_BASE + tag | reg);
}
if (bus == sc->sc_bus + 1) {
KASSERT(dev == 0);
return bus_space_read_4(sc->sc_iot, sc->sc_axi_ioh, tag | reg);
}
return 0xffffffff;
}
void
rkpcie_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data)
{
struct rkpcie_softc *sc = v;
int bus, dev, fn;
rkpcie_decompose_tag(sc, tag, &bus, &dev, &fn);
if (bus == sc->sc_bus) {
KASSERT(dev == 0);
HWRITE4(sc, PCIE_RC_NORMAL_BASE + tag | reg, data);
return;
}
if (bus == sc->sc_bus + 1) {
KASSERT(dev == 0);
bus_space_write_4(sc->sc_iot, sc->sc_axi_ioh, tag | reg, data);
return;
}
}
int
rkpcie_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
int pin = pa->pa_rawintrpin;
if (pin == 0 || pin > PCI_INTERRUPT_PIN_MAX)
return -1;
if (pa->pa_tag == 0)
return -1;
ihp->ih_pc = pa->pa_pc;
ihp->ih_tag = pa->pa_intrtag;
ihp->ih_intrpin = pa->pa_intrpin;
ihp->ih_type = PCI_INTX;
return 0;
}
const char *
rkpcie_intr_string(void *v, pci_intr_handle_t ih)
{
switch (ih.ih_type) {
case PCI_MSI:
return "msi";
case PCI_MSIX:
return "msix";
}
return "intx";
}
void *
rkpcie_intr_establish(void *v, pci_intr_handle_t ih, int level,
struct cpu_info *ci, int (*func)(void *), void *arg, char *name)
{
struct rkpcie_softc *sc = v;
void *cookie;
KASSERT(ih.ih_type != PCI_NONE);
if (ih.ih_type != PCI_INTX) {
uint64_t addr, data;
/* Assume hardware passes Requester ID as sideband data. */
data = pci_requester_id(ih.ih_pc, ih.ih_tag);
cookie = fdt_intr_establish_msi_cpu(sc->sc_node, &addr,
&data, level, ci, func, arg, name);
if (cookie == NULL)
return NULL;
/* TODO: translate address to the PCI device's view */
if (ih.ih_type == PCI_MSIX) {
pci_msix_enable(ih.ih_pc, ih.ih_tag,
sc->sc_iot, ih.ih_intrpin, addr, data);
} else
pci_msi_enable(ih.ih_pc, ih.ih_tag, addr, data);
} else {
/* Unmask legacy interrupts. */
HWRITE4(sc, PCIE_CLIENT_INT_MASK,
PCIE_CLIENT_INTA_UNMASK | PCIE_CLIENT_INTB_UNMASK |
PCIE_CLIENT_INTC_UNMASK | PCIE_CLIENT_INTD_UNMASK);
cookie = fdt_intr_establish_idx_cpu(sc->sc_node, 1, level,
ci, func, arg, name);
}
return cookie;
}
void
rkpcie_intr_disestablish(void *v, void *cookie)
{
}
/*
* PHY Support.
*/
#define RK3399_GRF_SOC_CON5_PCIE 0xe214
#define RK3399_TX_ELEC_IDLE_OFF_MASK ((1 << 3) << 16)
#define RK3399_TX_ELEC_IDLE_OFF (1 << 3)
#define RK3399_GRF_SOC_CON8 0xe220
#define RK3399_PCIE_TEST_DATA_MASK ((0xf << 7) << 16)
#define RK3399_PCIE_TEST_DATA_SHIFT 7
#define RK3399_PCIE_TEST_ADDR_MASK ((0x3f << 1) << 16)
#define RK3399_PCIE_TEST_ADDR_SHIFT 1
#define RK3399_PCIE_TEST_WRITE_ENABLE (((1 << 0) << 16) | (1 << 0))
#define RK3399_PCIE_TEST_WRITE_DISABLE (((1 << 0) << 16) | (0 << 0))
#define RK3399_GRF_SOC_STATUS1 0xe2a4
#define RK3399_PCIE_PHY_PLL_LOCKED (1 << 9)
#define RK3399_PCIE_PHY_PLL_OUTPUT (1 << 10)
#define RK3399_PCIE_PHY_CFG_PLL_LOCK 0x10
#define RK3399_PCIE_PHY_CFG_CLK_TEST 0x10
#define RK3399_PCIE_PHY_CFG_SEPE_RATE (1 << 3)
#define RK3399_PCIE_PHY_CFG_CLK_SCC 0x12
#define RK3399_PCIE_PHY_CFG_PLL_100M (1 << 3)
void
rkpcie_phy_init(struct rkpcie_softc *sc)
{
uint32_t phys[8];
int len;
len = OF_getpropintarray(sc->sc_node, "phys", phys, sizeof(phys));
if (len < sizeof(phys[0]))
return;
sc->sc_phy_node = OF_getnodebyphandle(phys[0]);
if (sc->sc_phy_node == 0)
return;
clock_enable(sc->sc_phy_node, "refclk");
reset_assert(sc->sc_phy_node, "phy");
}
void
rkpcie_phy_write_conf(struct regmap *rm, uint8_t addr, uint8_t data)
{
regmap_write_4(rm, RK3399_GRF_SOC_CON8,
RK3399_PCIE_TEST_ADDR_MASK |
(addr << RK3399_PCIE_TEST_ADDR_SHIFT) |
RK3399_PCIE_TEST_DATA_MASK |
(data << RK3399_PCIE_TEST_DATA_SHIFT) |
RK3399_PCIE_TEST_WRITE_DISABLE);
delay(1);
regmap_write_4(rm, RK3399_GRF_SOC_CON8,
RK3399_PCIE_TEST_WRITE_ENABLE);
delay(1);
regmap_write_4(rm, RK3399_GRF_SOC_CON8,
RK3399_PCIE_TEST_WRITE_DISABLE);
}
void
rkpcie_phy_poweron(struct rkpcie_softc *sc)
{
struct regmap *rm;
uint32_t status;
int lane = 0;
int timo;
reset_deassert(sc->sc_phy_node, "phy");
rm = regmap_bynode(OF_parent(sc->sc_phy_node));
if (rm == NULL)
return;
regmap_write_4(rm, RK3399_GRF_SOC_CON8,
RK3399_PCIE_TEST_ADDR_MASK |
RK3399_PCIE_PHY_CFG_PLL_LOCK << RK3399_PCIE_TEST_ADDR_SHIFT);
regmap_write_4(rm, RK3399_GRF_SOC_CON5_PCIE,
RK3399_TX_ELEC_IDLE_OFF_MASK << lane | 0);
for (timo = 50; timo > 0; timo--) {
status = regmap_read_4(rm, RK3399_GRF_SOC_STATUS1);
if (status & RK3399_PCIE_PHY_PLL_LOCKED)
break;
delay(20000);
}
if (timo == 0) {
printf("%s: PHY PLL lock timeout\n", sc->sc_dev.dv_xname);
return;
}
rkpcie_phy_write_conf(rm, RK3399_PCIE_PHY_CFG_CLK_TEST,
RK3399_PCIE_PHY_CFG_SEPE_RATE);
rkpcie_phy_write_conf(rm, RK3399_PCIE_PHY_CFG_CLK_SCC,
RK3399_PCIE_PHY_CFG_PLL_100M);
for (timo = 50; timo > 0; timo--) {
status = regmap_read_4(rm, RK3399_GRF_SOC_STATUS1);
if ((status & RK3399_PCIE_PHY_PLL_OUTPUT) == 0)
break;
delay(20000);
}
if (timo == 0) {
printf("%s: PHY PLL output enable timeout\n",
sc->sc_dev.dv_xname);
return;
}
regmap_write_4(rm, RK3399_GRF_SOC_CON8,
RK3399_PCIE_TEST_ADDR_MASK |
RK3399_PCIE_PHY_CFG_PLL_LOCK << RK3399_PCIE_TEST_ADDR_SHIFT);
for (timo = 50; timo > 0; timo--) {
status = regmap_read_4(rm, RK3399_GRF_SOC_STATUS1);
if (status & RK3399_PCIE_PHY_PLL_LOCKED)
break;
delay(20000);
}
if (timo == 0) {
printf("%s: PHY PLL relock timeout\n", sc->sc_dev.dv_xname);
return;
}
}
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