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path: root/drivers/pci/controller/dwc/pcie-tegra194.c
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Diffstat (limited to 'drivers/pci/controller/dwc/pcie-tegra194.c')
-rw-r--r--drivers/pci/controller/dwc/pcie-tegra194.c684
1 files changed, 433 insertions, 251 deletions
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index cc2678490162..1b6b437823d2 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -1,8 +1,10 @@
// SPDX-License-Identifier: GPL-2.0+
/*
- * PCIe host controller driver for Tegra194 SoC
+ * PCIe host controller driver for the following SoCs
+ * Tegra194
+ * Tegra234
*
- * Copyright (C) 2019 NVIDIA Corporation.
+ * Copyright (C) 2019-2022 NVIDIA Corporation.
*
* Author: Vidya Sagar <vidyas@nvidia.com>
*/
@@ -35,6 +37,9 @@
#include <soc/tegra/bpmp-abi.h>
#include "../../pci.h"
+#define TEGRA194_DWC_IP_VER 0x490A
+#define TEGRA234_DWC_IP_VER 0x562A
+
#define APPL_PINMUX 0x0
#define APPL_PINMUX_PEX_RST BIT(0)
#define APPL_PINMUX_CLKREQ_OVERRIDE_EN BIT(2)
@@ -49,6 +54,7 @@
#define APPL_CTRL_HW_HOT_RST_MODE_MASK GENMASK(1, 0)
#define APPL_CTRL_HW_HOT_RST_MODE_SHIFT 22
#define APPL_CTRL_HW_HOT_RST_MODE_IMDT_RST 0x1
+#define APPL_CTRL_HW_HOT_RST_MODE_IMDT_RST_LTSSM_EN 0x2
#define APPL_INTR_EN_L0_0 0x8
#define APPL_INTR_EN_L0_0_LINK_STATE_INT_EN BIT(0)
@@ -170,19 +176,6 @@
#define CFG_TIMER_CTRL_MAX_FUNC_NUM_OFF 0x718
#define CFG_TIMER_CTRL_ACK_NAK_SHIFT (19)
-#define EVENT_COUNTER_ALL_CLEAR 0x3
-#define EVENT_COUNTER_ENABLE_ALL 0x7
-#define EVENT_COUNTER_ENABLE_SHIFT 2
-#define EVENT_COUNTER_EVENT_SEL_MASK GENMASK(7, 0)
-#define EVENT_COUNTER_EVENT_SEL_SHIFT 16
-#define EVENT_COUNTER_EVENT_Tx_L0S 0x2
-#define EVENT_COUNTER_EVENT_Rx_L0S 0x3
-#define EVENT_COUNTER_EVENT_L1 0x5
-#define EVENT_COUNTER_EVENT_L1_1 0x7
-#define EVENT_COUNTER_EVENT_L1_2 0x8
-#define EVENT_COUNTER_GROUP_SEL_SHIFT 24
-#define EVENT_COUNTER_GROUP_5 0x5
-
#define N_FTS_VAL 52
#define FTS_VAL 52
@@ -191,12 +184,6 @@
#define GEN3_EQ_CONTROL_OFF_PSET_REQ_VEC_MASK GENMASK(23, 8)
#define GEN3_EQ_CONTROL_OFF_FB_MODE_MASK GENMASK(3, 0)
-#define GEN3_RELATED_OFF 0x890
-#define GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL BIT(0)
-#define GEN3_RELATED_OFF_GEN3_EQ_DISABLE BIT(16)
-#define GEN3_RELATED_OFF_RATE_SHADOW_SEL_SHIFT 24
-#define GEN3_RELATED_OFF_RATE_SHADOW_SEL_MASK GENMASK(25, 24)
-
#define PORT_LOGIC_AMBA_ERROR_RESPONSE_DEFAULT 0x8D0
#define AMBA_ERROR_RESPONSE_CRS_SHIFT 3
#define AMBA_ERROR_RESPONSE_CRS_MASK GENMASK(1, 0)
@@ -243,7 +230,19 @@ static const unsigned int pcie_gen_freq[] = {
GEN4_CORE_CLK_FREQ
};
-struct tegra194_pcie {
+struct tegra_pcie_dw_of_data {
+ u32 version;
+ enum dw_pcie_device_mode mode;
+ bool has_msix_doorbell_access_fix;
+ bool has_sbr_reset_fix;
+ bool has_l1ss_exit_fix;
+ bool has_ltr_req_fix;
+ u32 cdm_chk_int_en_bit;
+ u32 gen4_preset_vec;
+ u8 n_fts[2];
+};
+
+struct tegra_pcie_dw {
struct device *dev;
struct resource *appl_res;
struct resource *dbi_res;
@@ -255,17 +254,20 @@ struct tegra194_pcie {
struct dw_pcie pci;
struct tegra_bpmp *bpmp;
- enum dw_pcie_device_mode mode;
+ struct tegra_pcie_dw_of_data *of_data;
bool supports_clkreq;
bool enable_cdm_check;
+ bool enable_srns;
bool link_state;
bool update_fc_fixup;
+ bool enable_ext_refclk;
u8 init_link_width;
u32 msi_ctrl_int;
u32 num_lanes;
u32 cid;
u32 cfg_link_cap_l1sub;
+ u32 ras_des_cap;
u32 pcie_cap_base;
u32 aspm_cmrt;
u32 aspm_pwr_on_t;
@@ -287,22 +289,18 @@ struct tegra194_pcie {
int ep_state;
};
-struct tegra194_pcie_of_data {
- enum dw_pcie_device_mode mode;
-};
-
-static inline struct tegra194_pcie *to_tegra_pcie(struct dw_pcie *pci)
+static inline struct tegra_pcie_dw *to_tegra_pcie(struct dw_pcie *pci)
{
- return container_of(pci, struct tegra194_pcie, pci);
+ return container_of(pci, struct tegra_pcie_dw, pci);
}
-static inline void appl_writel(struct tegra194_pcie *pcie, const u32 value,
+static inline void appl_writel(struct tegra_pcie_dw *pcie, const u32 value,
const u32 reg)
{
writel_relaxed(value, pcie->appl_base + reg);
}
-static inline u32 appl_readl(struct tegra194_pcie *pcie, const u32 reg)
+static inline u32 appl_readl(struct tegra_pcie_dw *pcie, const u32 reg)
{
return readl_relaxed(pcie->appl_base + reg);
}
@@ -311,10 +309,10 @@ struct tegra_pcie_soc {
enum dw_pcie_device_mode mode;
};
-static void apply_bad_link_workaround(struct pcie_port *pp)
+static void apply_bad_link_workaround(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct tegra194_pcie *pcie = to_tegra_pcie(pci);
+ struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
u32 current_link_width;
u16 val;
@@ -347,18 +345,18 @@ static void apply_bad_link_workaround(struct pcie_port *pp)
static irqreturn_t tegra_pcie_rp_irq_handler(int irq, void *arg)
{
- struct tegra194_pcie *pcie = arg;
+ struct tegra_pcie_dw *pcie = arg;
struct dw_pcie *pci = &pcie->pci;
- struct pcie_port *pp = &pci->pp;
- u32 val, tmp;
+ struct dw_pcie_rp *pp = &pci->pp;
+ u32 val, status_l0, status_l1;
u16 val_w;
- val = appl_readl(pcie, APPL_INTR_STATUS_L0);
- if (val & APPL_INTR_STATUS_L0_LINK_STATE_INT) {
- val = appl_readl(pcie, APPL_INTR_STATUS_L1_0_0);
- if (val & APPL_INTR_STATUS_L1_0_0_LINK_REQ_RST_NOT_CHGED) {
- appl_writel(pcie, val, APPL_INTR_STATUS_L1_0_0);
-
+ status_l0 = appl_readl(pcie, APPL_INTR_STATUS_L0);
+ if (status_l0 & APPL_INTR_STATUS_L0_LINK_STATE_INT) {
+ status_l1 = appl_readl(pcie, APPL_INTR_STATUS_L1_0_0);
+ appl_writel(pcie, status_l1, APPL_INTR_STATUS_L1_0_0);
+ if (!pcie->of_data->has_sbr_reset_fix &&
+ status_l1 & APPL_INTR_STATUS_L1_0_0_LINK_REQ_RST_NOT_CHGED) {
/* SBR & Surprise Link Down WAR */
val = appl_readl(pcie, APPL_CAR_RESET_OVRD);
val &= ~APPL_CAR_RESET_OVRD_CYA_OVERRIDE_CORE_RST_N;
@@ -374,15 +372,21 @@ static irqreturn_t tegra_pcie_rp_irq_handler(int irq, void *arg)
}
}
- if (val & APPL_INTR_STATUS_L0_INT_INT) {
- val = appl_readl(pcie, APPL_INTR_STATUS_L1_8_0);
- if (val & APPL_INTR_STATUS_L1_8_0_AUTO_BW_INT_STS) {
+ if (status_l0 & APPL_INTR_STATUS_L0_INT_INT) {
+ status_l1 = appl_readl(pcie, APPL_INTR_STATUS_L1_8_0);
+ if (status_l1 & APPL_INTR_STATUS_L1_8_0_AUTO_BW_INT_STS) {
appl_writel(pcie,
APPL_INTR_STATUS_L1_8_0_AUTO_BW_INT_STS,
APPL_INTR_STATUS_L1_8_0);
apply_bad_link_workaround(pp);
}
- if (val & APPL_INTR_STATUS_L1_8_0_BW_MGT_INT_STS) {
+ if (status_l1 & APPL_INTR_STATUS_L1_8_0_BW_MGT_INT_STS) {
+ val_w = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base +
+ PCI_EXP_LNKSTA);
+ val_w |= PCI_EXP_LNKSTA_LBMS;
+ dw_pcie_writew_dbi(pci, pcie->pcie_cap_base +
+ PCI_EXP_LNKSTA, val_w);
+
appl_writel(pcie,
APPL_INTR_STATUS_L1_8_0_BW_MGT_INT_STS,
APPL_INTR_STATUS_L1_8_0);
@@ -394,31 +398,30 @@ static irqreturn_t tegra_pcie_rp_irq_handler(int irq, void *arg)
}
}
- val = appl_readl(pcie, APPL_INTR_STATUS_L0);
- if (val & APPL_INTR_STATUS_L0_CDM_REG_CHK_INT) {
- val = appl_readl(pcie, APPL_INTR_STATUS_L1_18);
- tmp = dw_pcie_readl_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS);
- if (val & APPL_INTR_STATUS_L1_18_CDM_REG_CHK_CMPLT) {
+ if (status_l0 & APPL_INTR_STATUS_L0_CDM_REG_CHK_INT) {
+ status_l1 = appl_readl(pcie, APPL_INTR_STATUS_L1_18);
+ val = dw_pcie_readl_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS);
+ if (status_l1 & APPL_INTR_STATUS_L1_18_CDM_REG_CHK_CMPLT) {
dev_info(pci->dev, "CDM check complete\n");
- tmp |= PCIE_PL_CHK_REG_CHK_REG_COMPLETE;
+ val |= PCIE_PL_CHK_REG_CHK_REG_COMPLETE;
}
- if (val & APPL_INTR_STATUS_L1_18_CDM_REG_CHK_CMP_ERR) {
+ if (status_l1 & APPL_INTR_STATUS_L1_18_CDM_REG_CHK_CMP_ERR) {
dev_err(pci->dev, "CDM comparison mismatch\n");
- tmp |= PCIE_PL_CHK_REG_CHK_REG_COMPARISON_ERROR;
+ val |= PCIE_PL_CHK_REG_CHK_REG_COMPARISON_ERROR;
}
- if (val & APPL_INTR_STATUS_L1_18_CDM_REG_CHK_LOGIC_ERR) {
+ if (status_l1 & APPL_INTR_STATUS_L1_18_CDM_REG_CHK_LOGIC_ERR) {
dev_err(pci->dev, "CDM Logic error\n");
- tmp |= PCIE_PL_CHK_REG_CHK_REG_LOGIC_ERROR;
+ val |= PCIE_PL_CHK_REG_CHK_REG_LOGIC_ERROR;
}
- dw_pcie_writel_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS, tmp);
- tmp = dw_pcie_readl_dbi(pci, PCIE_PL_CHK_REG_ERR_ADDR);
- dev_err(pci->dev, "CDM Error Address Offset = 0x%08X\n", tmp);
+ dw_pcie_writel_dbi(pci, PCIE_PL_CHK_REG_CONTROL_STATUS, val);
+ val = dw_pcie_readl_dbi(pci, PCIE_PL_CHK_REG_ERR_ADDR);
+ dev_err(pci->dev, "CDM Error Address Offset = 0x%08X\n", val);
}
return IRQ_HANDLED;
}
-static void pex_ep_event_hot_rst_done(struct tegra194_pcie *pcie)
+static void pex_ep_event_hot_rst_done(struct tegra_pcie_dw *pcie)
{
u32 val;
@@ -446,7 +449,7 @@ static void pex_ep_event_hot_rst_done(struct tegra194_pcie *pcie)
static irqreturn_t tegra_pcie_ep_irq_thread(int irq, void *arg)
{
- struct tegra194_pcie *pcie = arg;
+ struct tegra_pcie_dw *pcie = arg;
struct dw_pcie *pci = &pcie->pci;
u32 val, speed;
@@ -454,6 +457,9 @@ static irqreturn_t tegra_pcie_ep_irq_thread(int irq, void *arg)
PCI_EXP_LNKSTA_CLS;
clk_set_rate(pcie->core_clk, pcie_gen_freq[speed - 1]);
+ if (pcie->of_data->has_ltr_req_fix)
+ return IRQ_HANDLED;
+
/* If EP doesn't advertise L1SS, just return */
val = dw_pcie_readl_dbi(pci, pcie->cfg_link_cap_l1sub);
if (!(val & (PCI_L1SS_CAP_ASPM_L1_1 | PCI_L1SS_CAP_ASPM_L1_2)))
@@ -492,7 +498,7 @@ static irqreturn_t tegra_pcie_ep_irq_thread(int irq, void *arg)
static irqreturn_t tegra_pcie_ep_hard_irq(int irq, void *arg)
{
- struct tegra194_pcie *pcie = arg;
+ struct tegra_pcie_dw *pcie = arg;
struct dw_pcie_ep *ep = &pcie->pci.ep;
int spurious = 1;
u32 status_l0, status_l1, link_status;
@@ -535,16 +541,21 @@ static irqreturn_t tegra_pcie_ep_hard_irq(int irq, void *arg)
return IRQ_HANDLED;
}
-static int tegra194_pcie_rd_own_conf(struct pci_bus *bus, u32 devfn, int where,
+static int tegra_pcie_dw_rd_own_conf(struct pci_bus *bus, u32 devfn, int where,
int size, u32 *val)
{
+ struct dw_pcie_rp *pp = bus->sysdata;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
+
/*
* This is an endpoint mode specific register happen to appear even
* when controller is operating in root port mode and system hangs
* when it is accessed with link being in ASPM-L1 state.
* So skip accessing it altogether
*/
- if (!PCI_SLOT(devfn) && where == PORT_LOGIC_MSIX_DOORBELL) {
+ if (!pcie->of_data->has_msix_doorbell_access_fix &&
+ !PCI_SLOT(devfn) && where == PORT_LOGIC_MSIX_DOORBELL) {
*val = 0x00000000;
return PCIBIOS_SUCCESSFUL;
}
@@ -552,16 +563,21 @@ static int tegra194_pcie_rd_own_conf(struct pci_bus *bus, u32 devfn, int where,
return pci_generic_config_read(bus, devfn, where, size, val);
}
-static int tegra194_pcie_wr_own_conf(struct pci_bus *bus, u32 devfn, int where,
+static int tegra_pcie_dw_wr_own_conf(struct pci_bus *bus, u32 devfn, int where,
int size, u32 val)
{
+ struct dw_pcie_rp *pp = bus->sysdata;
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
+
/*
* This is an endpoint mode specific register happen to appear even
* when controller is operating in root port mode and system hangs
* when it is accessed with link being in ASPM-L1 state.
* So skip accessing it altogether
*/
- if (!PCI_SLOT(devfn) && where == PORT_LOGIC_MSIX_DOORBELL)
+ if (!pcie->of_data->has_msix_doorbell_access_fix &&
+ !PCI_SLOT(devfn) && where == PORT_LOGIC_MSIX_DOORBELL)
return PCIBIOS_SUCCESSFUL;
return pci_generic_config_write(bus, devfn, where, size, val);
@@ -569,30 +585,12 @@ static int tegra194_pcie_wr_own_conf(struct pci_bus *bus, u32 devfn, int where,
static struct pci_ops tegra_pci_ops = {
.map_bus = dw_pcie_own_conf_map_bus,
- .read = tegra194_pcie_rd_own_conf,
- .write = tegra194_pcie_wr_own_conf,
+ .read = tegra_pcie_dw_rd_own_conf,
+ .write = tegra_pcie_dw_wr_own_conf,
};
#if defined(CONFIG_PCIEASPM)
-static const u32 event_cntr_ctrl_offset[] = {
- 0x1d8,
- 0x1a8,
- 0x1a8,
- 0x1a8,
- 0x1c4,
- 0x1d8
-};
-
-static const u32 event_cntr_data_offset[] = {
- 0x1dc,
- 0x1ac,
- 0x1ac,
- 0x1ac,
- 0x1c8,
- 0x1dc
-};
-
-static void disable_aspm_l11(struct tegra194_pcie *pcie)
+static void disable_aspm_l11(struct tegra_pcie_dw *pcie)
{
u32 val;
@@ -601,7 +599,7 @@ static void disable_aspm_l11(struct tegra194_pcie *pcie)
dw_pcie_writel_dbi(&pcie->pci, pcie->cfg_link_cap_l1sub, val);
}
-static void disable_aspm_l12(struct tegra194_pcie *pcie)
+static void disable_aspm_l12(struct tegra_pcie_dw *pcie)
{
u32 val;
@@ -610,24 +608,27 @@ static void disable_aspm_l12(struct tegra194_pcie *pcie)
dw_pcie_writel_dbi(&pcie->pci, pcie->cfg_link_cap_l1sub, val);
}
-static inline u32 event_counter_prog(struct tegra194_pcie *pcie, u32 event)
+static inline u32 event_counter_prog(struct tegra_pcie_dw *pcie, u32 event)
{
u32 val;
- val = dw_pcie_readl_dbi(&pcie->pci, event_cntr_ctrl_offset[pcie->cid]);
+ val = dw_pcie_readl_dbi(&pcie->pci, pcie->ras_des_cap +
+ PCIE_RAS_DES_EVENT_COUNTER_CONTROL);
val &= ~(EVENT_COUNTER_EVENT_SEL_MASK << EVENT_COUNTER_EVENT_SEL_SHIFT);
val |= EVENT_COUNTER_GROUP_5 << EVENT_COUNTER_GROUP_SEL_SHIFT;
val |= event << EVENT_COUNTER_EVENT_SEL_SHIFT;
val |= EVENT_COUNTER_ENABLE_ALL << EVENT_COUNTER_ENABLE_SHIFT;
- dw_pcie_writel_dbi(&pcie->pci, event_cntr_ctrl_offset[pcie->cid], val);
- val = dw_pcie_readl_dbi(&pcie->pci, event_cntr_data_offset[pcie->cid]);
+ dw_pcie_writel_dbi(&pcie->pci, pcie->ras_des_cap +
+ PCIE_RAS_DES_EVENT_COUNTER_CONTROL, val);
+ val = dw_pcie_readl_dbi(&pcie->pci, pcie->ras_des_cap +
+ PCIE_RAS_DES_EVENT_COUNTER_DATA);
return val;
}
static int aspm_state_cnt(struct seq_file *s, void *data)
{
- struct tegra194_pcie *pcie = (struct tegra194_pcie *)
+ struct tegra_pcie_dw *pcie = (struct tegra_pcie_dw *)
dev_get_drvdata(s->private);
u32 val;
@@ -647,18 +648,20 @@ static int aspm_state_cnt(struct seq_file *s, void *data)
event_counter_prog(pcie, EVENT_COUNTER_EVENT_L1_2));
/* Clear all counters */
- dw_pcie_writel_dbi(&pcie->pci, event_cntr_ctrl_offset[pcie->cid],
+ dw_pcie_writel_dbi(&pcie->pci, pcie->ras_des_cap +
+ PCIE_RAS_DES_EVENT_COUNTER_CONTROL,
EVENT_COUNTER_ALL_CLEAR);
/* Re-enable counting */
val = EVENT_COUNTER_ENABLE_ALL << EVENT_COUNTER_ENABLE_SHIFT;
val |= EVENT_COUNTER_GROUP_5 << EVENT_COUNTER_GROUP_SEL_SHIFT;
- dw_pcie_writel_dbi(&pcie->pci, event_cntr_ctrl_offset[pcie->cid], val);
+ dw_pcie_writel_dbi(&pcie->pci, pcie->ras_des_cap +
+ PCIE_RAS_DES_EVENT_COUNTER_CONTROL, val);
return 0;
}
-static void init_host_aspm(struct tegra194_pcie *pcie)
+static void init_host_aspm(struct tegra_pcie_dw *pcie)
{
struct dw_pcie *pci = &pcie->pci;
u32 val;
@@ -666,10 +669,14 @@ static void init_host_aspm(struct tegra194_pcie *pcie)
val = dw_pcie_find_ext_capability(pci, PCI_EXT_CAP_ID_L1SS);
pcie->cfg_link_cap_l1sub = val + PCI_L1SS_CAP;
+ pcie->ras_des_cap = dw_pcie_find_ext_capability(&pcie->pci,
+ PCI_EXT_CAP_ID_VNDR);
+
/* Enable ASPM counters */
val = EVENT_COUNTER_ENABLE_ALL << EVENT_COUNTER_ENABLE_SHIFT;
val |= EVENT_COUNTER_GROUP_5 << EVENT_COUNTER_GROUP_SEL_SHIFT;
- dw_pcie_writel_dbi(pci, event_cntr_ctrl_offset[pcie->cid], val);
+ dw_pcie_writel_dbi(pci, pcie->ras_des_cap +
+ PCIE_RAS_DES_EVENT_COUNTER_CONTROL, val);
/* Program T_cmrt and T_pwr_on values */
val = dw_pcie_readl_dbi(pci, pcie->cfg_link_cap_l1sub);
@@ -686,22 +693,22 @@ static void init_host_aspm(struct tegra194_pcie *pcie)
dw_pcie_writel_dbi(pci, PCIE_PORT_AFR, val);
}
-static void init_debugfs(struct tegra194_pcie *pcie)
+static void init_debugfs(struct tegra_pcie_dw *pcie)
{
debugfs_create_devm_seqfile(pcie->dev, "aspm_state_cnt", pcie->debugfs,
aspm_state_cnt);
}
#else
-static inline void disable_aspm_l12(struct tegra194_pcie *pcie) { return; }
-static inline void disable_aspm_l11(struct tegra194_pcie *pcie) { return; }
-static inline void init_host_aspm(struct tegra194_pcie *pcie) { return; }
-static inline void init_debugfs(struct tegra194_pcie *pcie) { return; }
+static inline void disable_aspm_l12(struct tegra_pcie_dw *pcie) { return; }
+static inline void disable_aspm_l11(struct tegra_pcie_dw *pcie) { return; }
+static inline void init_host_aspm(struct tegra_pcie_dw *pcie) { return; }
+static inline void init_debugfs(struct tegra_pcie_dw *pcie) { return; }
#endif
-static void tegra_pcie_enable_system_interrupts(struct pcie_port *pp)
+static void tegra_pcie_enable_system_interrupts(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct tegra194_pcie *pcie = to_tegra_pcie(pci);
+ struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
u32 val;
u16 val_w;
@@ -709,13 +716,15 @@ static void tegra_pcie_enable_system_interrupts(struct pcie_port *pp)
val |= APPL_INTR_EN_L0_0_LINK_STATE_INT_EN;
appl_writel(pcie, val, APPL_INTR_EN_L0_0);
- val = appl_readl(pcie, APPL_INTR_EN_L1_0_0);
- val |= APPL_INTR_EN_L1_0_0_LINK_REQ_RST_NOT_INT_EN;
- appl_writel(pcie, val, APPL_INTR_EN_L1_0_0);
+ if (!pcie->of_data->has_sbr_reset_fix) {
+ val = appl_readl(pcie, APPL_INTR_EN_L1_0_0);
+ val |= APPL_INTR_EN_L1_0_0_LINK_REQ_RST_NOT_INT_EN;
+ appl_writel(pcie, val, APPL_INTR_EN_L1_0_0);
+ }
if (pcie->enable_cdm_check) {
val = appl_readl(pcie, APPL_INTR_EN_L0_0);
- val |= APPL_INTR_EN_L0_0_CDM_REG_CHK_INT_EN;
+ val |= pcie->of_data->cdm_chk_int_en_bit;
appl_writel(pcie, val, APPL_INTR_EN_L0_0);
val = appl_readl(pcie, APPL_INTR_EN_L1_18);
@@ -736,10 +745,10 @@ static void tegra_pcie_enable_system_interrupts(struct pcie_port *pp)
val_w);
}
-static void tegra_pcie_enable_legacy_interrupts(struct pcie_port *pp)
+static void tegra_pcie_enable_legacy_interrupts(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct tegra194_pcie *pcie = to_tegra_pcie(pci);
+ struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
u32 val;
/* Enable legacy interrupt generation */
@@ -757,10 +766,10 @@ static void tegra_pcie_enable_legacy_interrupts(struct pcie_port *pp)
appl_writel(pcie, val, APPL_INTR_EN_L1_8_0);
}
-static void tegra_pcie_enable_msi_interrupts(struct pcie_port *pp)
+static void tegra_pcie_enable_msi_interrupts(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct tegra194_pcie *pcie = to_tegra_pcie(pci);
+ struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
u32 val;
/* Enable MSI interrupt generation */
@@ -770,10 +779,10 @@ static void tegra_pcie_enable_msi_interrupts(struct pcie_port *pp)
appl_writel(pcie, val, APPL_INTR_EN_L0_0);
}
-static void tegra_pcie_enable_interrupts(struct pcie_port *pp)
+static void tegra_pcie_enable_interrupts(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct tegra194_pcie *pcie = to_tegra_pcie(pci);
+ struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
/* Clear interrupt statuses before enabling interrupts */
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L0);
@@ -798,7 +807,7 @@ static void tegra_pcie_enable_interrupts(struct pcie_port *pp)
tegra_pcie_enable_msi_interrupts(pp);
}
-static void config_gen3_gen4_eq_presets(struct tegra194_pcie *pcie)
+static void config_gen3_gen4_eq_presets(struct tegra_pcie_dw *pcie)
{
struct dw_pcie *pci = &pcie->pci;
u32 val, offset, i;
@@ -842,7 +851,8 @@ static void config_gen3_gen4_eq_presets(struct tegra194_pcie *pcie)
val = dw_pcie_readl_dbi(pci, GEN3_EQ_CONTROL_OFF);
val &= ~GEN3_EQ_CONTROL_OFF_PSET_REQ_VEC_MASK;
- val |= (0x360 << GEN3_EQ_CONTROL_OFF_PSET_REQ_VEC_SHIFT);
+ val |= (pcie->of_data->gen4_preset_vec <<
+ GEN3_EQ_CONTROL_OFF_PSET_REQ_VEC_SHIFT);
val &= ~GEN3_EQ_CONTROL_OFF_FB_MODE_MASK;
dw_pcie_writel_dbi(pci, GEN3_EQ_CONTROL_OFF, val);
@@ -851,11 +861,12 @@ static void config_gen3_gen4_eq_presets(struct tegra194_pcie *pcie)
dw_pcie_writel_dbi(pci, GEN3_RELATED_OFF, val);
}
-static int tegra194_pcie_host_init(struct pcie_port *pp)
+static int tegra_pcie_dw_host_init(struct dw_pcie_rp *pp)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct tegra194_pcie *pcie = to_tegra_pcie(pci);
+ struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
u32 val;
+ u16 val_16;
pp->bridge->ops = &tegra_pci_ops;
@@ -863,6 +874,11 @@ static int tegra194_pcie_host_init(struct pcie_port *pp)
pcie->pcie_cap_base = dw_pcie_find_capability(&pcie->pci,
PCI_CAP_ID_EXP);
+ val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_DEVCTL);
+ val_16 &= ~PCI_EXP_DEVCTL_PAYLOAD;
+ val_16 |= PCI_EXP_DEVCTL_PAYLOAD_256B;
+ dw_pcie_writew_dbi(pci, pcie->pcie_cap_base + PCI_EXP_DEVCTL, val_16);
+
val = dw_pcie_readl_dbi(pci, PCI_IO_BASE);
val &= ~(IO_BASE_IO_DECODE | IO_BASE_IO_DECODE_BIT8);
dw_pcie_writel_dbi(pci, PCI_IO_BASE, val);
@@ -887,6 +903,15 @@ static int tegra194_pcie_host_init(struct pcie_port *pp)
val |= (pcie->num_lanes << PCI_EXP_LNKSTA_NLW_SHIFT);
dw_pcie_writel_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKCAP, val);
+ /* Clear Slot Clock Configuration bit if SRNS configuration */
+ if (pcie->enable_srns) {
+ val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base +
+ PCI_EXP_LNKSTA);
+ val_16 &= ~PCI_EXP_LNKSTA_SLC;
+ dw_pcie_writew_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKSTA,
+ val_16);
+ }
+
config_gen3_gen4_eq_presets(pcie);
init_host_aspm(pcie);
@@ -897,9 +922,11 @@ static int tegra194_pcie_host_init(struct pcie_port *pp)
disable_aspm_l12(pcie);
}
- val = dw_pcie_readl_dbi(pci, GEN3_RELATED_OFF);
- val &= ~GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL;
- dw_pcie_writel_dbi(pci, GEN3_RELATED_OFF, val);
+ if (!pcie->of_data->has_l1ss_exit_fix) {
+ val = dw_pcie_readl_dbi(pci, GEN3_RELATED_OFF);
+ val &= ~GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL;
+ dw_pcie_writel_dbi(pci, GEN3_RELATED_OFF, val);
+ }
if (pcie->update_fc_fixup) {
val = dw_pcie_readl_dbi(pci, CFG_TIMER_CTRL_MAX_FUNC_NUM_OFF);
@@ -912,14 +939,14 @@ static int tegra194_pcie_host_init(struct pcie_port *pp)
return 0;
}
-static int tegra194_pcie_start_link(struct dw_pcie *pci)
+static int tegra_pcie_dw_start_link(struct dw_pcie *pci)
{
u32 val, offset, speed, tmp;
- struct tegra194_pcie *pcie = to_tegra_pcie(pci);
- struct pcie_port *pp = &pci->pp;
+ struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
+ struct dw_pcie_rp *pp = &pci->pp;
bool retry = true;
- if (pcie->mode == DW_PCIE_EP_TYPE) {
+ if (pcie->of_data->mode == DW_PCIE_EP_TYPE) {
enable_irq(pcie->pex_rst_irq);
return 0;
}
@@ -978,9 +1005,9 @@ retry_link:
offset = dw_pcie_find_ext_capability(pci, PCI_EXT_CAP_ID_DLF);
val = dw_pcie_readl_dbi(pci, offset + PCI_DLF_CAP);
val &= ~PCI_DLF_EXCHANGE_ENABLE;
- dw_pcie_writel_dbi(pci, offset, val);
+ dw_pcie_writel_dbi(pci, offset + PCI_DLF_CAP, val);
- tegra194_pcie_host_init(pp);
+ tegra_pcie_dw_host_init(pp);
dw_pcie_setup_rc(pp);
retry = false;
@@ -996,32 +1023,32 @@ retry_link:
return 0;
}
-static int tegra194_pcie_link_up(struct dw_pcie *pci)
+static int tegra_pcie_dw_link_up(struct dw_pcie *pci)
{
- struct tegra194_pcie *pcie = to_tegra_pcie(pci);
+ struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
u32 val = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKSTA);
return !!(val & PCI_EXP_LNKSTA_DLLLA);
}
-static void tegra194_pcie_stop_link(struct dw_pcie *pci)
+static void tegra_pcie_dw_stop_link(struct dw_pcie *pci)
{
- struct tegra194_pcie *pcie = to_tegra_pcie(pci);
+ struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
disable_irq(pcie->pex_rst_irq);
}
static const struct dw_pcie_ops tegra_dw_pcie_ops = {
- .link_up = tegra194_pcie_link_up,
- .start_link = tegra194_pcie_start_link,
- .stop_link = tegra194_pcie_stop_link,
+ .link_up = tegra_pcie_dw_link_up,
+ .start_link = tegra_pcie_dw_start_link,
+ .stop_link = tegra_pcie_dw_stop_link,
};
-static const struct dw_pcie_host_ops tegra194_pcie_host_ops = {
- .host_init = tegra194_pcie_host_init,
+static const struct dw_pcie_host_ops tegra_pcie_dw_host_ops = {
+ .host_init = tegra_pcie_dw_host_init,
};
-static void tegra_pcie_disable_phy(struct tegra194_pcie *pcie)
+static void tegra_pcie_disable_phy(struct tegra_pcie_dw *pcie)
{
unsigned int phy_count = pcie->phy_count;
@@ -1031,7 +1058,7 @@ static void tegra_pcie_disable_phy(struct tegra194_pcie *pcie)
}
}
-static int tegra_pcie_enable_phy(struct tegra194_pcie *pcie)
+static int tegra_pcie_enable_phy(struct tegra_pcie_dw *pcie)
{
unsigned int i;
int ret;
@@ -1058,7 +1085,7 @@ phy_exit:
return ret;
}
-static int tegra194_pcie_parse_dt(struct tegra194_pcie *pcie)
+static int tegra_pcie_dw_parse_dt(struct tegra_pcie_dw *pcie)
{
struct platform_device *pdev = to_platform_device(pcie->dev);
struct device_node *np = pcie->dev->of_node;
@@ -1111,13 +1138,27 @@ static int tegra194_pcie_parse_dt(struct tegra194_pcie *pcie)
if (of_property_read_bool(np, "nvidia,update-fc-fixup"))
pcie->update_fc_fixup = true;
+ /* RP using an external REFCLK is supported only in Tegra234 */
+ if (pcie->of_data->version == TEGRA194_DWC_IP_VER) {
+ if (pcie->of_data->mode == DW_PCIE_EP_TYPE)
+ pcie->enable_ext_refclk = true;
+ } else {
+ pcie->enable_ext_refclk =
+ of_property_read_bool(pcie->dev->of_node,
+ "nvidia,enable-ext-refclk");
+ }
+
pcie->supports_clkreq =
of_property_read_bool(pcie->dev->of_node, "supports-clkreq");
pcie->enable_cdm_check =
of_property_read_bool(np, "snps,enable-cdm-check");
- if (pcie->mode == DW_PCIE_RC_TYPE)
+ if (pcie->of_data->version == TEGRA234_DWC_IP_VER)
+ pcie->enable_srns =
+ of_property_read_bool(np, "nvidia,enable-srns");
+
+ if (pcie->of_data->mode == DW_PCIE_RC_TYPE)
return 0;
/* Endpoint mode specific DT entries */
@@ -1154,15 +1195,18 @@ static int tegra194_pcie_parse_dt(struct tegra194_pcie *pcie)
return 0;
}
-static int tegra_pcie_bpmp_set_ctrl_state(struct tegra194_pcie *pcie,
+static int tegra_pcie_bpmp_set_ctrl_state(struct tegra_pcie_dw *pcie,
bool enable)
{
struct mrq_uphy_response resp;
struct tegra_bpmp_message msg;
struct mrq_uphy_request req;
- /* Controller-5 doesn't need to have its state set by BPMP-FW */
- if (pcie->cid == 5)
+ /*
+ * Controller-5 doesn't need to have its state set by BPMP-FW in
+ * Tegra194
+ */
+ if (pcie->of_data->version == TEGRA194_DWC_IP_VER && pcie->cid == 5)
return 0;
memset(&req, 0, sizeof(req));
@@ -1182,7 +1226,7 @@ static int tegra_pcie_bpmp_set_ctrl_state(struct tegra194_pcie *pcie,
return tegra_bpmp_transfer(pcie->bpmp, &msg);
}
-static int tegra_pcie_bpmp_set_pll_state(struct tegra194_pcie *pcie,
+static int tegra_pcie_bpmp_set_pll_state(struct tegra_pcie_dw *pcie,
bool enable)
{
struct mrq_uphy_response resp;
@@ -1210,9 +1254,9 @@ static int tegra_pcie_bpmp_set_pll_state(struct tegra194_pcie *pcie,
return tegra_bpmp_transfer(pcie->bpmp, &msg);
}
-static void tegra_pcie_downstream_dev_to_D0(struct tegra194_pcie *pcie)
+static void tegra_pcie_downstream_dev_to_D0(struct tegra_pcie_dw *pcie)
{
- struct pcie_port *pp = &pcie->pci.pp;
+ struct dw_pcie_rp *pp = &pcie->pci.pp;
struct pci_bus *child, *root_bus = NULL;
struct pci_dev *pdev;
@@ -1248,7 +1292,7 @@ static void tegra_pcie_downstream_dev_to_D0(struct tegra194_pcie *pcie)
}
}
-static int tegra_pcie_get_slot_regulators(struct tegra194_pcie *pcie)
+static int tegra_pcie_get_slot_regulators(struct tegra_pcie_dw *pcie)
{
pcie->slot_ctl_3v3 = devm_regulator_get_optional(pcie->dev, "vpcie3v3");
if (IS_ERR(pcie->slot_ctl_3v3)) {
@@ -1269,7 +1313,7 @@ static int tegra_pcie_get_slot_regulators(struct tegra194_pcie *pcie)
return 0;
}
-static int tegra_pcie_enable_slot_regulators(struct tegra194_pcie *pcie)
+static int tegra_pcie_enable_slot_regulators(struct tegra_pcie_dw *pcie)
{
int ret;
@@ -1307,7 +1351,7 @@ fail_12v_enable:
return ret;
}
-static void tegra_pcie_disable_slot_regulators(struct tegra194_pcie *pcie)
+static void tegra_pcie_disable_slot_regulators(struct tegra_pcie_dw *pcie)
{
if (pcie->slot_ctl_12v)
regulator_disable(pcie->slot_ctl_12v);
@@ -1315,7 +1359,7 @@ static void tegra_pcie_disable_slot_regulators(struct tegra194_pcie *pcie)
regulator_disable(pcie->slot_ctl_3v3);
}
-static int tegra_pcie_config_controller(struct tegra194_pcie *pcie,
+static int tegra_pcie_config_controller(struct tegra_pcie_dw *pcie,
bool en_hw_hot_rst)
{
int ret;
@@ -1328,6 +1372,14 @@ static int tegra_pcie_config_controller(struct tegra194_pcie *pcie,
return ret;
}
+ if (pcie->enable_ext_refclk) {
+ ret = tegra_pcie_bpmp_set_pll_state(pcie, true);
+ if (ret) {
+ dev_err(pcie->dev, "Failed to init UPHY: %d\n", ret);
+ goto fail_pll_init;
+ }
+ }
+
ret = tegra_pcie_enable_slot_regulators(pcie);
if (ret < 0)
goto fail_slot_reg_en;
@@ -1351,11 +1403,13 @@ static int tegra_pcie_config_controller(struct tegra194_pcie *pcie,
goto fail_core_apb_rst;
}
- if (en_hw_hot_rst) {
+ if (en_hw_hot_rst || pcie->of_data->has_sbr_reset_fix) {
/* Enable HW_HOT_RST mode */
val = appl_readl(pcie, APPL_CTRL);
val &= ~(APPL_CTRL_HW_HOT_RST_MODE_MASK <<
APPL_CTRL_HW_HOT_RST_MODE_SHIFT);
+ val |= (APPL_CTRL_HW_HOT_RST_MODE_IMDT_RST_LTSSM_EN <<
+ APPL_CTRL_HW_HOT_RST_MODE_SHIFT);
val |= APPL_CTRL_HW_HOT_RST_EN;
appl_writel(pcie, val, APPL_CTRL);
}
@@ -1382,6 +1436,19 @@ static int tegra_pcie_config_controller(struct tegra194_pcie *pcie,
val |= (APPL_CFG_MISC_ARCACHE_VAL << APPL_CFG_MISC_ARCACHE_SHIFT);
appl_writel(pcie, val, APPL_CFG_MISC);
+ if (pcie->enable_srns || pcie->enable_ext_refclk) {
+ /*
+ * When Tegra PCIe RP is using external clock, it cannot supply
+ * same clock to its downstream hierarchy. Hence, gate PCIe RP
+ * REFCLK out pads when RP & EP are using separate clocks or RP
+ * is using an external REFCLK.
+ */
+ val = appl_readl(pcie, APPL_PINMUX);
+ val |= APPL_PINMUX_CLK_OUTPUT_IN_OVERRIDE_EN;
+ val &= ~APPL_PINMUX_CLK_OUTPUT_IN_OVERRIDE;
+ appl_writel(pcie, val, APPL_PINMUX);
+ }
+
if (!pcie->supports_clkreq) {
val = appl_readl(pcie, APPL_PINMUX);
val |= APPL_PINMUX_CLKREQ_OVERRIDE_EN;
@@ -1407,12 +1474,15 @@ fail_core_clk:
fail_reg_en:
tegra_pcie_disable_slot_regulators(pcie);
fail_slot_reg_en:
+ if (pcie->enable_ext_refclk)
+ tegra_pcie_bpmp_set_pll_state(pcie, false);
+fail_pll_init:
tegra_pcie_bpmp_set_ctrl_state(pcie, false);
return ret;
}
-static void tegra_pcie_unconfig_controller(struct tegra194_pcie *pcie)
+static void tegra_pcie_unconfig_controller(struct tegra_pcie_dw *pcie)
{
int ret;
@@ -1434,23 +1504,29 @@ static void tegra_pcie_unconfig_controller(struct tegra194_pcie *pcie)
tegra_pcie_disable_slot_regulators(pcie);
+ if (pcie->enable_ext_refclk) {
+ ret = tegra_pcie_bpmp_set_pll_state(pcie, false);
+ if (ret)
+ dev_err(pcie->dev, "Failed to deinit UPHY: %d\n", ret);
+ }
+
ret = tegra_pcie_bpmp_set_ctrl_state(pcie, false);
if (ret)
dev_err(pcie->dev, "Failed to disable controller %d: %d\n",
pcie->cid, ret);
}
-static int tegra_pcie_init_controller(struct tegra194_pcie *pcie)
+static int tegra_pcie_init_controller(struct tegra_pcie_dw *pcie)
{
struct dw_pcie *pci = &pcie->pci;
- struct pcie_port *pp = &pci->pp;
+ struct dw_pcie_rp *pp = &pci->pp;
int ret;
ret = tegra_pcie_config_controller(pcie, false);
if (ret < 0)
return ret;
- pp->ops = &tegra194_pcie_host_ops;
+ pp->ops = &tegra_pcie_dw_host_ops;
ret = dw_pcie_host_init(pp);
if (ret < 0) {
@@ -1465,11 +1541,11 @@ fail_host_init:
return ret;
}
-static int tegra_pcie_try_link_l2(struct tegra194_pcie *pcie)
+static int tegra_pcie_try_link_l2(struct tegra_pcie_dw *pcie)
{
u32 val;
- if (!tegra194_pcie_link_up(&pcie->pci))
+ if (!tegra_pcie_dw_link_up(&pcie->pci))
return 0;
val = appl_readl(pcie, APPL_RADM_STATUS);
@@ -1481,12 +1557,12 @@ static int tegra_pcie_try_link_l2(struct tegra194_pcie *pcie)
1, PME_ACK_TIMEOUT);
}
-static void tegra194_pcie_pme_turnoff(struct tegra194_pcie *pcie)
+static void tegra_pcie_dw_pme_turnoff(struct tegra_pcie_dw *pcie)
{
u32 data;
int err;
- if (!tegra194_pcie_link_up(&pcie->pci)) {
+ if (!tegra_pcie_dw_link_up(&pcie->pci)) {
dev_dbg(pcie->dev, "PCIe link is not up...!\n");
return;
}
@@ -1543,15 +1619,15 @@ static void tegra194_pcie_pme_turnoff(struct tegra194_pcie *pcie)
appl_writel(pcie, data, APPL_PINMUX);
}
-static void tegra_pcie_deinit_controller(struct tegra194_pcie *pcie)
+static void tegra_pcie_deinit_controller(struct tegra_pcie_dw *pcie)
{
tegra_pcie_downstream_dev_to_D0(pcie);
dw_pcie_host_deinit(&pcie->pci.pp);
- tegra194_pcie_pme_turnoff(pcie);
+ tegra_pcie_dw_pme_turnoff(pcie);
tegra_pcie_unconfig_controller(pcie);
}
-static int tegra_pcie_config_rp(struct tegra194_pcie *pcie)
+static int tegra_pcie_config_rp(struct tegra_pcie_dw *pcie)
{
struct device *dev = pcie->dev;
char *name;
@@ -1578,7 +1654,7 @@ static int tegra_pcie_config_rp(struct tegra194_pcie *pcie)
goto fail_pm_get_sync;
}
- pcie->link_state = tegra194_pcie_link_up(&pcie->pci);
+ pcie->link_state = tegra_pcie_dw_link_up(&pcie->pci);
if (!pcie->link_state) {
ret = -ENOMEDIUM;
goto fail_host_init;
@@ -1603,7 +1679,7 @@ fail_pm_get_sync:
return ret;
}
-static void pex_ep_event_pex_rst_assert(struct tegra194_pcie *pcie)
+static void pex_ep_event_pex_rst_assert(struct tegra_pcie_dw *pcie)
{
u32 val;
int ret;
@@ -1634,6 +1710,13 @@ static void pex_ep_event_pex_rst_assert(struct tegra194_pcie *pcie)
pm_runtime_put_sync(pcie->dev);
+ if (pcie->enable_ext_refclk) {
+ ret = tegra_pcie_bpmp_set_pll_state(pcie, false);
+ if (ret)
+ dev_err(pcie->dev, "Failed to turn off UPHY: %d\n",
+ ret);
+ }
+
ret = tegra_pcie_bpmp_set_pll_state(pcie, false);
if (ret)
dev_err(pcie->dev, "Failed to turn off UPHY: %d\n", ret);
@@ -1642,13 +1725,14 @@ static void pex_ep_event_pex_rst_assert(struct tegra194_pcie *pcie)
dev_dbg(pcie->dev, "Uninitialization of endpoint is completed\n");
}
-static void pex_ep_event_pex_rst_deassert(struct tegra194_pcie *pcie)
+static void pex_ep_event_pex_rst_deassert(struct tegra_pcie_dw *pcie)
{
struct dw_pcie *pci = &pcie->pci;
struct dw_pcie_ep *ep = &pci->ep;
struct device *dev = pcie->dev;
u32 val;
int ret;
+ u16 val_16;
if (pcie->ep_state == EP_STATE_ENABLED)
return;
@@ -1660,10 +1744,20 @@ static void pex_ep_event_pex_rst_deassert(struct tegra194_pcie *pcie)
return;
}
- ret = tegra_pcie_bpmp_set_pll_state(pcie, true);
+ ret = tegra_pcie_bpmp_set_ctrl_state(pcie, true);
if (ret) {
- dev_err(dev, "Failed to init UPHY for PCIe EP: %d\n", ret);
- goto fail_pll_init;
+ dev_err(pcie->dev, "Failed to enable controller %u: %d\n",
+ pcie->cid, ret);
+ goto fail_set_ctrl_state;
+ }
+
+ if (pcie->enable_ext_refclk) {
+ ret = tegra_pcie_bpmp_set_pll_state(pcie, true);
+ if (ret) {
+ dev_err(dev, "Failed to init UPHY for PCIe EP: %d\n",
+ ret);
+ goto fail_pll_init;
+ }
}
ret = clk_prepare_enable(pcie->core_clk);
@@ -1760,12 +1854,29 @@ static void pex_ep_event_pex_rst_deassert(struct tegra194_pcie *pcie)
disable_aspm_l12(pcie);
}
- val = dw_pcie_readl_dbi(pci, GEN3_RELATED_OFF);
- val &= ~GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL;
- dw_pcie_writel_dbi(pci, GEN3_RELATED_OFF, val);
+ if (!pcie->of_data->has_l1ss_exit_fix) {
+ val = dw_pcie_readl_dbi(pci, GEN3_RELATED_OFF);
+ val &= ~GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL;
+ dw_pcie_writel_dbi(pci, GEN3_RELATED_OFF, val);
+ }
pcie->pcie_cap_base = dw_pcie_find_capability(&pcie->pci,
PCI_CAP_ID_EXP);
+
+ val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base + PCI_EXP_DEVCTL);
+ val_16 &= ~PCI_EXP_DEVCTL_PAYLOAD;
+ val_16 |= PCI_EXP_DEVCTL_PAYLOAD_256B;
+ dw_pcie_writew_dbi(pci, pcie->pcie_cap_base + PCI_EXP_DEVCTL, val_16);
+
+ /* Clear Slot Clock Configuration bit if SRNS configuration */
+ if (pcie->enable_srns) {
+ val_16 = dw_pcie_readw_dbi(pci, pcie->pcie_cap_base +
+ PCI_EXP_LNKSTA);
+ val_16 &= ~PCI_EXP_LNKSTA_SLC;
+ dw_pcie_writew_dbi(pci, pcie->pcie_cap_base + PCI_EXP_LNKSTA,
+ val_16);
+ }
+
clk_set_rate(pcie->core_clk, GEN4_CORE_CLK_FREQ);
val = (ep->msi_mem_phys & MSIX_ADDR_MATCH_LOW_OFF_MASK);
@@ -1782,6 +1893,13 @@ static void pex_ep_event_pex_rst_deassert(struct tegra194_pcie *pcie)
dw_pcie_ep_init_notify(ep);
+ /* Program the private control to allow sending LTR upstream */
+ if (pcie->of_data->has_ltr_req_fix) {
+ val = appl_readl(pcie, APPL_LTR_MSG_2);
+ val |= APPL_LTR_MSG_2_LTR_MSG_REQ_STATE;
+ appl_writel(pcie, val, APPL_LTR_MSG_2);
+ }
+
/* Enable LTSSM */
val = appl_readl(pcie, APPL_CTRL);
val |= APPL_CTRL_LTSSM_EN;
@@ -1802,12 +1920,14 @@ fail_core_apb_rst:
fail_core_clk_enable:
tegra_pcie_bpmp_set_pll_state(pcie, false);
fail_pll_init:
+ tegra_pcie_bpmp_set_ctrl_state(pcie, false);
+fail_set_ctrl_state:
pm_runtime_put_sync(dev);
}
static irqreturn_t tegra_pcie_ep_pex_rst_irq(int irq, void *arg)
{
- struct tegra194_pcie *pcie = arg;
+ struct tegra_pcie_dw *pcie = arg;
if (gpiod_get_value(pcie->pex_rst_gpiod))
pex_ep_event_pex_rst_assert(pcie);
@@ -1817,7 +1937,7 @@ static irqreturn_t tegra_pcie_ep_pex_rst_irq(int irq, void *arg)
return IRQ_HANDLED;
}
-static int tegra_pcie_ep_raise_legacy_irq(struct tegra194_pcie *pcie, u16 irq)
+static int tegra_pcie_ep_raise_legacy_irq(struct tegra_pcie_dw *pcie, u16 irq)
{
/* Tegra194 supports only INTA */
if (irq > 1)
@@ -1829,7 +1949,7 @@ static int tegra_pcie_ep_raise_legacy_irq(struct tegra194_pcie *pcie, u16 irq)
return 0;
}
-static int tegra_pcie_ep_raise_msi_irq(struct tegra194_pcie *pcie, u16 irq)
+static int tegra_pcie_ep_raise_msi_irq(struct tegra_pcie_dw *pcie, u16 irq)
{
if (unlikely(irq > 31))
return -EINVAL;
@@ -1839,7 +1959,7 @@ static int tegra_pcie_ep_raise_msi_irq(struct tegra194_pcie *pcie, u16 irq)
return 0;
}
-static int tegra_pcie_ep_raise_msix_irq(struct tegra194_pcie *pcie, u16 irq)
+static int tegra_pcie_ep_raise_msix_irq(struct tegra_pcie_dw *pcie, u16 irq)
{
struct dw_pcie_ep *ep = &pcie->pci.ep;
@@ -1853,7 +1973,7 @@ static int tegra_pcie_ep_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
u16 interrupt_num)
{
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
- struct tegra194_pcie *pcie = to_tegra_pcie(pci);
+ struct tegra_pcie_dw *pcie = to_tegra_pcie(pci);
switch (type) {
case PCI_EPC_IRQ_LEGACY:
@@ -1894,7 +2014,7 @@ static const struct dw_pcie_ep_ops pcie_ep_ops = {
.get_features = tegra_pcie_ep_get_features,
};
-static int tegra_pcie_config_ep(struct tegra194_pcie *pcie,
+static int tegra_pcie_config_ep(struct tegra_pcie_dw *pcie,
struct platform_device *pdev)
{
struct dw_pcie *pci = &pcie->pci;
@@ -1949,19 +2069,20 @@ static int tegra_pcie_config_ep(struct tegra194_pcie *pcie,
if (ret) {
dev_err(dev, "Failed to initialize DWC Endpoint subsystem: %d\n",
ret);
+ pm_runtime_disable(dev);
return ret;
}
return 0;
}
-static int tegra194_pcie_probe(struct platform_device *pdev)
+static int tegra_pcie_dw_probe(struct platform_device *pdev)
{
- const struct tegra194_pcie_of_data *data;
+ const struct tegra_pcie_dw_of_data *data;
struct device *dev = &pdev->dev;
struct resource *atu_dma_res;
- struct tegra194_pcie *pcie;
- struct pcie_port *pp;
+ struct tegra_pcie_dw *pcie;
+ struct dw_pcie_rp *pp;
struct dw_pcie *pci;
struct phy **phys;
char *name;
@@ -1977,16 +2098,14 @@ static int tegra194_pcie_probe(struct platform_device *pdev)
pci = &pcie->pci;
pci->dev = &pdev->dev;
pci->ops = &tegra_dw_pcie_ops;
- pci->n_fts[0] = N_FTS_VAL;
- pci->n_fts[1] = FTS_VAL;
- pci->version = 0x490A;
-
+ pcie->dev = &pdev->dev;
+ pcie->of_data = (struct tegra_pcie_dw_of_data *)data;
+ pci->n_fts[0] = pcie->of_data->n_fts[0];
+ pci->n_fts[1] = pcie->of_data->n_fts[1];
pp = &pci->pp;
pp->num_vectors = MAX_MSI_IRQS;
- pcie->dev = &pdev->dev;
- pcie->mode = (enum dw_pcie_device_mode)data->mode;
- ret = tegra194_pcie_parse_dt(pcie);
+ ret = tegra_pcie_dw_parse_dt(pcie);
if (ret < 0) {
const char *level = KERN_ERR;
@@ -2101,7 +2220,7 @@ static int tegra194_pcie_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, pcie);
- switch (pcie->mode) {
+ switch (pcie->of_data->mode) {
case DW_PCIE_RC_TYPE:
ret = devm_request_irq(dev, pp->irq, tegra_pcie_rp_irq_handler,
IRQF_SHARED, "tegra-pcie-intr", pcie);
@@ -2136,7 +2255,8 @@ static int tegra194_pcie_probe(struct platform_device *pdev)
break;
default:
- dev_err(dev, "Invalid PCIe device type %d\n", pcie->mode);
+ dev_err(dev, "Invalid PCIe device type %d\n",
+ pcie->of_data->mode);
}
fail:
@@ -2144,16 +2264,22 @@ fail:
return ret;
}
-static int tegra194_pcie_remove(struct platform_device *pdev)
+static int tegra_pcie_dw_remove(struct platform_device *pdev)
{
- struct tegra194_pcie *pcie = platform_get_drvdata(pdev);
+ struct tegra_pcie_dw *pcie = platform_get_drvdata(pdev);
- if (!pcie->link_state)
- return 0;
+ if (pcie->of_data->mode == DW_PCIE_RC_TYPE) {
+ if (!pcie->link_state)
+ return 0;
+
+ debugfs_remove_recursive(pcie->debugfs);
+ tegra_pcie_deinit_controller(pcie);
+ pm_runtime_put_sync(pcie->dev);
+ } else {
+ disable_irq(pcie->pex_rst_irq);
+ pex_ep_event_pex_rst_assert(pcie);
+ }
- debugfs_remove_recursive(pcie->debugfs);
- tegra_pcie_deinit_controller(pcie);
- pm_runtime_put_sync(pcie->dev);
pm_runtime_disable(pcie->dev);
tegra_bpmp_put(pcie->bpmp);
if (pcie->pex_refclk_sel_gpiod)
@@ -2162,41 +2288,48 @@ static int tegra194_pcie_remove(struct platform_device *pdev)
return 0;
}
-static int tegra194_pcie_suspend_late(struct device *dev)
+static int tegra_pcie_dw_suspend_late(struct device *dev)
{
- struct tegra194_pcie *pcie = dev_get_drvdata(dev);
+ struct tegra_pcie_dw *pcie = dev_get_drvdata(dev);
u32 val;
+ if (pcie->of_data->mode == DW_PCIE_EP_TYPE) {
+ dev_err(dev, "Failed to Suspend as Tegra PCIe is in EP mode\n");
+ return -EPERM;
+ }
+
if (!pcie->link_state)
return 0;
/* Enable HW_HOT_RST mode */
- val = appl_readl(pcie, APPL_CTRL);
- val &= ~(APPL_CTRL_HW_HOT_RST_MODE_MASK <<
- APPL_CTRL_HW_HOT_RST_MODE_SHIFT);
- val |= APPL_CTRL_HW_HOT_RST_EN;
- appl_writel(pcie, val, APPL_CTRL);
+ if (!pcie->of_data->has_sbr_reset_fix) {
+ val = appl_readl(pcie, APPL_CTRL);
+ val &= ~(APPL_CTRL_HW_HOT_RST_MODE_MASK <<
+ APPL_CTRL_HW_HOT_RST_MODE_SHIFT);
+ val |= APPL_CTRL_HW_HOT_RST_EN;
+ appl_writel(pcie, val, APPL_CTRL);
+ }
return 0;
}
-static int tegra194_pcie_suspend_noirq(struct device *dev)
+static int tegra_pcie_dw_suspend_noirq(struct device *dev)
{
- struct tegra194_pcie *pcie = dev_get_drvdata(dev);
+ struct tegra_pcie_dw *pcie = dev_get_drvdata(dev);
if (!pcie->link_state)
return 0;
tegra_pcie_downstream_dev_to_D0(pcie);
- tegra194_pcie_pme_turnoff(pcie);
+ tegra_pcie_dw_pme_turnoff(pcie);
tegra_pcie_unconfig_controller(pcie);
return 0;
}
-static int tegra194_pcie_resume_noirq(struct device *dev)
+static int tegra_pcie_dw_resume_noirq(struct device *dev)
{
- struct tegra194_pcie *pcie = dev_get_drvdata(dev);
+ struct tegra_pcie_dw *pcie = dev_get_drvdata(dev);
int ret;
if (!pcie->link_state)
@@ -2206,7 +2339,7 @@ static int tegra194_pcie_resume_noirq(struct device *dev)
if (ret < 0)
return ret;
- ret = tegra194_pcie_host_init(&pcie->pci.pp);
+ ret = tegra_pcie_dw_host_init(&pcie->pci.pp);
if (ret < 0) {
dev_err(dev, "Failed to init host: %d\n", ret);
goto fail_host_init;
@@ -2214,7 +2347,7 @@ static int tegra194_pcie_resume_noirq(struct device *dev)
dw_pcie_setup_rc(&pcie->pci.pp);
- ret = tegra194_pcie_start_link(&pcie->pci);
+ ret = tegra_pcie_dw_start_link(&pcie->pci);
if (ret < 0)
goto fail_host_init;
@@ -2225,12 +2358,12 @@ fail_host_init:
return ret;
}
-static int tegra194_pcie_resume_early(struct device *dev)
+static int tegra_pcie_dw_resume_early(struct device *dev)
{
- struct tegra194_pcie *pcie = dev_get_drvdata(dev);
+ struct tegra_pcie_dw *pcie = dev_get_drvdata(dev);
u32 val;
- if (pcie->mode == DW_PCIE_EP_TYPE) {
+ if (pcie->of_data->mode == DW_PCIE_EP_TYPE) {
dev_err(dev, "Suspend is not supported in EP mode");
return -ENOTSUPP;
}
@@ -2239,75 +2372,124 @@ static int tegra194_pcie_resume_early(struct device *dev)
return 0;
/* Disable HW_HOT_RST mode */
- val = appl_readl(pcie, APPL_CTRL);
- val &= ~(APPL_CTRL_HW_HOT_RST_MODE_MASK <<
- APPL_CTRL_HW_HOT_RST_MODE_SHIFT);
- val |= APPL_CTRL_HW_HOT_RST_MODE_IMDT_RST <<
- APPL_CTRL_HW_HOT_RST_MODE_SHIFT;
- val &= ~APPL_CTRL_HW_HOT_RST_EN;
- appl_writel(pcie, val, APPL_CTRL);
+ if (!pcie->of_data->has_sbr_reset_fix) {
+ val = appl_readl(pcie, APPL_CTRL);
+ val &= ~(APPL_CTRL_HW_HOT_RST_MODE_MASK <<
+ APPL_CTRL_HW_HOT_RST_MODE_SHIFT);
+ val |= APPL_CTRL_HW_HOT_RST_MODE_IMDT_RST <<
+ APPL_CTRL_HW_HOT_RST_MODE_SHIFT;
+ val &= ~APPL_CTRL_HW_HOT_RST_EN;
+ appl_writel(pcie, val, APPL_CTRL);
+ }
return 0;
}
-static void tegra194_pcie_shutdown(struct platform_device *pdev)
+static void tegra_pcie_dw_shutdown(struct platform_device *pdev)
{
- struct tegra194_pcie *pcie = platform_get_drvdata(pdev);
+ struct tegra_pcie_dw *pcie = platform_get_drvdata(pdev);
- if (!pcie->link_state)
- return;
+ if (pcie->of_data->mode == DW_PCIE_RC_TYPE) {
+ if (!pcie->link_state)
+ return;
- debugfs_remove_recursive(pcie->debugfs);
- tegra_pcie_downstream_dev_to_D0(pcie);
+ debugfs_remove_recursive(pcie->debugfs);
+ tegra_pcie_downstream_dev_to_D0(pcie);
- disable_irq(pcie->pci.pp.irq);
- if (IS_ENABLED(CONFIG_PCI_MSI))
- disable_irq(pcie->pci.pp.msi_irq);
+ disable_irq(pcie->pci.pp.irq);
+ if (IS_ENABLED(CONFIG_PCI_MSI))
+ disable_irq(pcie->pci.pp.msi_irq[0]);
- tegra194_pcie_pme_turnoff(pcie);
- tegra_pcie_unconfig_controller(pcie);
+ tegra_pcie_dw_pme_turnoff(pcie);
+ tegra_pcie_unconfig_controller(pcie);
+ pm_runtime_put_sync(pcie->dev);
+ } else {
+ disable_irq(pcie->pex_rst_irq);
+ pex_ep_event_pex_rst_assert(pcie);
+ }
}
-static const struct tegra194_pcie_of_data tegra194_pcie_rc_of_data = {
+static const struct tegra_pcie_dw_of_data tegra194_pcie_dw_rc_of_data = {
+ .version = TEGRA194_DWC_IP_VER,
+ .mode = DW_PCIE_RC_TYPE,
+ .cdm_chk_int_en_bit = BIT(19),
+ /* Gen4 - 5, 6, 8 and 9 presets enabled */
+ .gen4_preset_vec = 0x360,
+ .n_fts = { 52, 52 },
+};
+
+static const struct tegra_pcie_dw_of_data tegra194_pcie_dw_ep_of_data = {
+ .version = TEGRA194_DWC_IP_VER,
+ .mode = DW_PCIE_EP_TYPE,
+ .cdm_chk_int_en_bit = BIT(19),
+ /* Gen4 - 5, 6, 8 and 9 presets enabled */
+ .gen4_preset_vec = 0x360,
+ .n_fts = { 52, 52 },
+};
+
+static const struct tegra_pcie_dw_of_data tegra234_pcie_dw_rc_of_data = {
+ .version = TEGRA234_DWC_IP_VER,
.mode = DW_PCIE_RC_TYPE,
+ .has_msix_doorbell_access_fix = true,
+ .has_sbr_reset_fix = true,
+ .has_l1ss_exit_fix = true,
+ .cdm_chk_int_en_bit = BIT(18),
+ /* Gen4 - 6, 8 and 9 presets enabled */
+ .gen4_preset_vec = 0x340,
+ .n_fts = { 52, 80 },
};
-static const struct tegra194_pcie_of_data tegra194_pcie_ep_of_data = {
+static const struct tegra_pcie_dw_of_data tegra234_pcie_dw_ep_of_data = {
+ .version = TEGRA234_DWC_IP_VER,
.mode = DW_PCIE_EP_TYPE,
+ .has_l1ss_exit_fix = true,
+ .has_ltr_req_fix = true,
+ .cdm_chk_int_en_bit = BIT(18),
+ /* Gen4 - 6, 8 and 9 presets enabled */
+ .gen4_preset_vec = 0x340,
+ .n_fts = { 52, 80 },
};
-static const struct of_device_id tegra194_pcie_of_match[] = {
+static const struct of_device_id tegra_pcie_dw_of_match[] = {
{
.compatible = "nvidia,tegra194-pcie",
- .data = &tegra194_pcie_rc_of_data,
+ .data = &tegra194_pcie_dw_rc_of_data,
},
{
.compatible = "nvidia,tegra194-pcie-ep",
- .data = &tegra194_pcie_ep_of_data,
+ .data = &tegra194_pcie_dw_ep_of_data,
+ },
+ {
+ .compatible = "nvidia,tegra234-pcie",
+ .data = &tegra234_pcie_dw_rc_of_data,
+ },
+ {
+ .compatible = "nvidia,tegra234-pcie-ep",
+ .data = &tegra234_pcie_dw_ep_of_data,
},
- {},
+ {}
};
-static const struct dev_pm_ops tegra194_pcie_pm_ops = {
- .suspend_late = tegra194_pcie_suspend_late,
- .suspend_noirq = tegra194_pcie_suspend_noirq,
- .resume_noirq = tegra194_pcie_resume_noirq,
- .resume_early = tegra194_pcie_resume_early,
+static const struct dev_pm_ops tegra_pcie_dw_pm_ops = {
+ .suspend_late = tegra_pcie_dw_suspend_late,
+ .suspend_noirq = tegra_pcie_dw_suspend_noirq,
+ .resume_noirq = tegra_pcie_dw_resume_noirq,
+ .resume_early = tegra_pcie_dw_resume_early,
};
-static struct platform_driver tegra194_pcie_driver = {
- .probe = tegra194_pcie_probe,
- .remove = tegra194_pcie_remove,
- .shutdown = tegra194_pcie_shutdown,
+static struct platform_driver tegra_pcie_dw_driver = {
+ .probe = tegra_pcie_dw_probe,
+ .remove = tegra_pcie_dw_remove,
+ .shutdown = tegra_pcie_dw_shutdown,
.driver = {
.name = "tegra194-pcie",
- .pm = &tegra194_pcie_pm_ops,
- .of_match_table = tegra194_pcie_of_match,
+ .pm = &tegra_pcie_dw_pm_ops,
+ .of_match_table = tegra_pcie_dw_of_match,
},
};
-module_platform_driver(tegra194_pcie_driver);
+module_platform_driver(tegra_pcie_dw_driver);
-MODULE_DEVICE_TABLE(of, tegra194_pcie_of_match);
+MODULE_DEVICE_TABLE(of, tegra_pcie_dw_of_match);
MODULE_AUTHOR("Vidya Sagar <vidyas@nvidia.com>");
MODULE_DESCRIPTION("NVIDIA PCIe host controller driver");
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-18 20:46:38 +0300