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path: root/drivers/pci/controller/dwc
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Diffstat (limited to 'drivers/pci/controller/dwc')
-rw-r--r--drivers/pci/controller/dwc/pcie-artpec6.c37
-rw-r--r--drivers/pci/controller/dwc/pcie-designware.c28
-rw-r--r--drivers/pci/controller/dwc/pcie-designware.h3
-rw-r--r--drivers/pci/controller/dwc/pcie-intel-gw.c27
-rw-r--r--drivers/pci/controller/dwc/pcie-tegra194.c25
5 files changed, 35 insertions, 85 deletions
diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/controller/dwc/pcie-artpec6.c
index 86f4d66d8587..929448e9e0bc 100644
--- a/drivers/pci/controller/dwc/pcie-artpec6.c
+++ b/drivers/pci/controller/dwc/pcie-artpec6.c
@@ -44,13 +44,6 @@ struct artpec_pcie_of_data {
static const struct of_device_id artpec6_pcie_of_match[];
-/* PCIe Port Logic registers (memory-mapped) */
-#define PL_OFFSET 0x700
-
-#define ACK_F_ASPM_CTRL_OFF (PL_OFFSET + 0xc)
-#define ACK_N_FTS_MASK GENMASK(15, 8)
-#define ACK_N_FTS(x) (((x) << 8) & ACK_N_FTS_MASK)
-
/* ARTPEC-6 specific registers */
#define PCIECFG 0x18
#define PCIECFG_DBG_OEN BIT(24)
@@ -289,30 +282,6 @@ static void artpec6_pcie_init_phy(struct artpec6_pcie *artpec6_pcie)
}
}
-static void artpec6_pcie_set_nfts(struct artpec6_pcie *artpec6_pcie)
-{
- struct dw_pcie *pci = artpec6_pcie->pci;
- u32 val;
-
- if (artpec6_pcie->variant != ARTPEC7)
- return;
-
- /*
- * Increase the N_FTS (Number of Fast Training Sequences)
- * to be transmitted when transitioning from L0s to L0.
- */
- val = dw_pcie_readl_dbi(pci, ACK_F_ASPM_CTRL_OFF);
- val &= ~ACK_N_FTS_MASK;
- val |= ACK_N_FTS(180);
- dw_pcie_writel_dbi(pci, ACK_F_ASPM_CTRL_OFF, val);
-
- /*
- * Set the Number of Fast Training Sequences that the core
- * advertises as its N_FTS during Gen2 or Gen3 link training.
- */
- dw_pcie_link_set_n_fts(pci, 180);
-}
-
static void artpec6_pcie_assert_core_reset(struct artpec6_pcie *artpec6_pcie)
{
u32 val;
@@ -351,11 +320,14 @@ static int artpec6_pcie_host_init(struct pcie_port *pp)
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct artpec6_pcie *artpec6_pcie = to_artpec6_pcie(pci);
+ if (artpec6_pcie->variant == ARTPEC7) {
+ pci->n_fts[0] = 180;
+ pci->n_fts[1] = 180;
+ }
artpec6_pcie_assert_core_reset(artpec6_pcie);
artpec6_pcie_init_phy(artpec6_pcie);
artpec6_pcie_deassert_core_reset(artpec6_pcie);
artpec6_pcie_wait_for_phy(artpec6_pcie);
- artpec6_pcie_set_nfts(artpec6_pcie);
dw_pcie_setup_rc(pp);
artpec6_pcie_establish_link(pci);
dw_pcie_wait_for_link(pci);
@@ -403,7 +375,6 @@ static void artpec6_pcie_ep_init(struct dw_pcie_ep *ep)
artpec6_pcie_init_phy(artpec6_pcie);
artpec6_pcie_deassert_core_reset(artpec6_pcie);
artpec6_pcie_wait_for_phy(artpec6_pcie);
- artpec6_pcie_set_nfts(artpec6_pcie);
for (bar = 0; bar < PCI_STD_NUM_BARS; bar++)
dw_pcie_ep_reset_bar(pci, bar);
diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index 5240153c15ba..3c3a4d1dbc0b 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -509,17 +509,6 @@ static void dw_pcie_link_set_max_speed(struct dw_pcie *pci, u32 link_gen)
}
-void dw_pcie_link_set_n_fts(struct dw_pcie *pci, u32 n_fts)
-{
- u32 val;
-
- val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
- val &= ~PORT_LOGIC_N_FTS_MASK;
- val |= n_fts & PORT_LOGIC_N_FTS_MASK;
- dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
-}
-EXPORT_SYMBOL_GPL(dw_pcie_link_set_n_fts);
-
static u8 dw_pcie_iatu_unroll_enabled(struct dw_pcie *pci)
{
u32 val;
@@ -549,6 +538,23 @@ void dw_pcie_setup(struct dw_pcie *pci)
if (pci->link_gen > 0)
dw_pcie_link_set_max_speed(pci, pci->link_gen);
+ /* Configure Gen1 N_FTS */
+ if (pci->n_fts[0]) {
+ val = dw_pcie_readl_dbi(pci, PCIE_PORT_AFR);
+ val &= ~(PORT_AFR_N_FTS_MASK | PORT_AFR_CC_N_FTS_MASK);
+ val |= PORT_AFR_N_FTS(pci->n_fts[0]);
+ val |= PORT_AFR_CC_N_FTS(pci->n_fts[0]);
+ dw_pcie_writel_dbi(pci, PCIE_PORT_AFR, val);
+ }
+
+ /* Configure Gen2+ N_FTS */
+ if (pci->n_fts[1]) {
+ val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
+ val &= ~PORT_LOGIC_N_FTS_MASK;
+ val |= pci->n_fts[pci->link_gen - 1];
+ dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
+ }
+
val = dw_pcie_readl_dbi(pci, PCIE_PORT_LINK_CONTROL);
val &= ~PORT_LINK_FAST_LINK_MODE;
val |= PORT_LINK_DLL_LINK_EN;
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index a814b1f17260..8cbc902a311a 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -34,6 +34,7 @@
#define PORT_AFR_N_FTS_MASK GENMASK(15, 8)
#define PORT_AFR_N_FTS(n) FIELD_PREP(PORT_AFR_N_FTS_MASK, n)
#define PORT_AFR_CC_N_FTS_MASK GENMASK(23, 16)
+#define PORT_AFR_CC_N_FTS(n) FIELD_PREP(PORT_AFR_CC_N_FTS_MASK, n)
#define PORT_AFR_ENTER_ASPM BIT(30)
#define PORT_AFR_L0S_ENTRANCE_LAT_SHIFT 24
#define PORT_AFR_L0S_ENTRANCE_LAT_MASK GENMASK(26, 24)
@@ -253,6 +254,7 @@ struct dw_pcie {
unsigned int version;
int num_lanes;
int link_gen;
+ u8 n_fts[2];
};
#define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)
@@ -271,7 +273,6 @@ void dw_pcie_write_dbi(struct dw_pcie *pci, u32 reg, size_t size, u32 val);
void dw_pcie_write_dbi2(struct dw_pcie *pci, u32 reg, size_t size, u32 val);
int dw_pcie_link_up(struct dw_pcie *pci);
void dw_pcie_upconfig_setup(struct dw_pcie *pci);
-void dw_pcie_link_set_n_fts(struct dw_pcie *pci, u32 n_fts);
int dw_pcie_wait_for_link(struct dw_pcie *pci);
void dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index,
int type, u64 cpu_addr, u64 pci_addr,
diff --git a/drivers/pci/controller/dwc/pcie-intel-gw.c b/drivers/pci/controller/dwc/pcie-intel-gw.c
index 333f11561807..5650cb78acba 100644
--- a/drivers/pci/controller/dwc/pcie-intel-gw.c
+++ b/drivers/pci/controller/dwc/pcie-intel-gw.c
@@ -67,7 +67,6 @@ struct intel_pcie_port {
void __iomem *app_base;
struct gpio_desc *reset_gpio;
u32 rst_intrvl;
- u32 n_fts;
struct clk *core_clk;
struct reset_control *core_rst;
struct phy *phy;
@@ -138,37 +137,29 @@ static void intel_pcie_link_setup(struct intel_pcie_port *lpp)
pcie_rc_cfg_wr(lpp, offset + PCI_EXP_LNKCTL, val);
}
-static void intel_pcie_port_logic_setup(struct intel_pcie_port *lpp)
+static void intel_pcie_init_n_fts(struct dw_pcie *pci)
{
- u32 val, mask;
- struct dw_pcie *pci = &lpp->pci;
-
- switch (pcie_link_speed[pci->link_gen]) {
- case PCIE_SPEED_8_0GT:
- lpp->n_fts = PORT_AFR_N_FTS_GEN3;
+ switch (pci->link_gen) {
+ case 3:
+ pci->n_fts[1] = PORT_AFR_N_FTS_GEN3;
break;
- case PCIE_SPEED_16_0GT:
- lpp->n_fts = PORT_AFR_N_FTS_GEN4;
+ case 4:
+ pci->n_fts[1] = PORT_AFR_N_FTS_GEN4;
break;
default:
- lpp->n_fts = PORT_AFR_N_FTS_GEN12_DFT;
+ pci->n_fts[1] = PORT_AFR_N_FTS_GEN12_DFT;
break;
}
-
- mask = PORT_AFR_N_FTS_MASK | PORT_AFR_CC_N_FTS_MASK;
- val = FIELD_PREP(PORT_AFR_N_FTS_MASK, lpp->n_fts) |
- FIELD_PREP(PORT_AFR_CC_N_FTS_MASK, lpp->n_fts);
- pcie_rc_cfg_wr_mask(lpp, PCIE_PORT_AFR, mask, val);
+ pci->n_fts[0] = PORT_AFR_N_FTS_GEN12_DFT;
}
static void intel_pcie_rc_setup(struct intel_pcie_port *lpp)
{
intel_pcie_ltssm_disable(lpp);
intel_pcie_link_setup(lpp);
+ intel_pcie_init_n_fts(&lpp->pci);
dw_pcie_setup_rc(&lpp->pci.pp);
dw_pcie_upconfig_setup(&lpp->pci);
- intel_pcie_port_logic_setup(lpp);
- dw_pcie_link_set_n_fts(&lpp->pci, lpp->n_fts);
}
static int intel_pcie_ep_rst_init(struct intel_pcie_port *lpp)
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index 91ef4b3e860d..1560c449757d 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -881,17 +881,6 @@ static void tegra_pcie_prepare_host(struct pcie_port *pp)
dw_pcie_writel_dbi(pci, PCI_BASE_ADDRESS_0, 0);
- /* Configure FTS */
- val = dw_pcie_readl_dbi(pci, PCIE_PORT_AFR);
- val &= ~PORT_AFR_N_FTS_MASK;
- val |= PORT_AFR_N_FTS(N_FTS_VAL);
- dw_pcie_writel_dbi(pci, PCIE_PORT_AFR, val);
-
- val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
- val &= ~PORT_LOGIC_N_FTS_MASK;
- val |= FTS_VAL;
- dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
-
/* Enable as 0xFFFF0001 response for CRS */
val = dw_pcie_readl_dbi(pci, PORT_LOGIC_AMBA_ERROR_RESPONSE_DEFAULT);
val &= ~(AMBA_ERROR_RESPONSE_CRS_MASK << AMBA_ERROR_RESPONSE_CRS_SHIFT);
@@ -1794,17 +1783,6 @@ static void pex_ep_event_pex_rst_deassert(struct tegra_pcie_dw *pcie)
val &= ~GEN3_RELATED_OFF_GEN3_ZRXDC_NONCOMPL;
dw_pcie_writel_dbi(pci, GEN3_RELATED_OFF, val);
- /* Configure N_FTS & FTS */
- val = dw_pcie_readl_dbi(pci, PCIE_PORT_AFR);
- val &= ~PORT_AFR_N_FTS_MASK;
- val |= PORT_AFR_N_FTS(FTS_VAL);
- dw_pcie_writel_dbi(pci, PCIE_PORT_AFR, val);
-
- val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL);
- val &= ~PORT_LOGIC_N_FTS_MASK;
- val |= FTS_VAL;
- dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val);
-
pcie->pcie_cap_base = dw_pcie_find_capability(&pcie->pci,
PCI_CAP_ID_EXP);
clk_set_rate(pcie->core_clk, GEN4_CORE_CLK_FREQ);
@@ -2033,6 +2011,9 @@ static int tegra_pcie_dw_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;
+
pp = &pci->pp;
pcie->dev = &pdev->dev;
pcie->mode = (enum dw_pcie_device_mode)data->mode;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-03 20:33:58 +0000