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openwrt/target/linux/bcm27xx/patches-6.6/950-0521-PCI-brcmstb-Add-BCM2712-support.patch
Álvaro Fernández Rojas 8c405cdccc bcm27xx: add 6.6 kernel patches 
The patches were generated from the RPi repo with the following command:
git format-patch v6.6.34..rpi-6.1.y

Some patches needed rebasing and, as usual, the applied and reverted, wireless
drivers, Github workflows, READMEs and defconfigs patches were removed.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2024-06-18 18:52:49 +02:00

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From 37093712c82c6105dc6640b826d1100bf514c5cf Mon Sep 17 00:00:00 2001
From: Jim Quinlan <james.quinlan@broadcom.com>
Date: Fri, 23 Jun 2023 10:40:57 -0400
Subject: [PATCH 0521/1085] PCI: brcmstb: Add BCM2712 support
PCI: brcmstb: differing register offsets on 2712
pcie-brcmstb: Add 2712 bridge reset support
pcie: 2712 PORT_MASK and rescal support
pcie-brcmstb: don't alter the L1SS debug register
For reasons unknown, this disables the reference clock
pcie-brcmstb: fix BAR2 enable and window decode
Set UBUS ACCESS_EN to let inbound DMA work. Also BCM2712 has grown
an index in the inbound window size decode register.
PCIe: brcmstb: Enable support for 64 MSI-Xs
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
pcie-brcmstb: Suppress read error responses
If the link is down or the EP fails to return a read completion, the
RC's default behaviour is to return an AXI error. This causes fatal
exceptions on A76, so it's better to respond with all 1s instead.
pcie-brcmstb: increase UBUS timeout to cater for link retrain events
pcie-brcmstb: Handle additional inbound regions
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
pcie-brcmstb: Add support for external MSI controller
pcie-brcmstb: add a reasonable default traffic class to priority map
BCM2712 supports multiple traffic classes (TCs) with independent
maximally sized transfer queues for each TC. Traffic classes have no
transaction ordering requirements between them, which facilitates
out-of-order completions and arbitration between posted writes for
data streams that have no dependence on each other.
In addition to the above benefits of splitting endpoint traffic into
individual queues, priorities can be assigned to traffic classes by
a heuristic or deterministic mechanism. The heuristic elevates AXI
QOS priority in accordance with the number of pending transfers in
each TC's queue, but for true priority signalling a forwarding
mechanism using vendor-defined messages is implemented.
Receipt of a 3 DWORD VDM assigns a priority tag to a TC on-the-fly,
and this tag corresponds to a configurable AXI QOS value.
As a simple baseline, assign a linear map of AXI QOS to each tag.
pcie: brcmstb: set up the VDM forwarding interface when setting up QoS
pcie-brcmstb: clean up debug messages
pcie-brcmstb: fix BCM2712A0 PHY PM errata
The power management clock is 54MHz not 50MHz, so adjust the PM clock period
to suit. Powering off the PHY PLL in L1.2 is unsafe, so force it on.
pcie-brcmstb: set CLKREQ functionality according to link partner support
The RC supports either L1 with clock PM or L1 sub-state control, not both
at the same time. Examine the link partner's capabilities to determine
which is the most suitable scheme to use.
pcie: brcmstb: don't reset block bridges in suspend or removal cases
BCM2712 has a single rescal block for all three root complexes, and
holding PCIE1's bridge in reset will hang the chip if a different
RC wants to access any of the rescal registers.
pcie: brcmstb: guard 2712-specific setup with a RC type check
BCM2711 doesn't implement the UBUS control registers.
pcie: brcmstb: On 2712 keeping the PLL powered in L1.x is not required
A separate misconfiguration when enabling SSC (the MDIO registers no
longer do the same thing on BCM2712) had the side-effect of breaking
PLL powerdown and resume sequencing.
Allow entry into a true L1.2 state where analogue is depowered.
pcie: brcmstb: Fix reset warning on probe failure
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
bcm2712: pcie: adjust PHY PLL setup to use a 54MHz input refclk
Use canned MDIO writes from Broadcom that switch the ref_clk output
pair to run from the internal fractional PLL, and set the internal PLL
to expect a 54MHz input reference clock.
Gen3 operation is not guaranteed to be stable in this setup, so default
to gen2.
This only works if the LCPLL is bypassed (requires latest bootloader).
pcie: brcmstb: add missing register writes
drivers: pcie: brcmstb: cater for BCM2712C0 bug dropping QoS on the floor
The AXI QoS value extracted from the request fifo ends up as zero forever.
Disabling this means that "panic" signalling doesn't do anything useful,
but static priorites do work.
Also align the selected TC:QoS map with RP1's expectations of service.
Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
drivers: pcie: brcmstb: shuffle TC priorities up to 8
Use the range 8-11 which puts the highest below HVS but leaves space
below for other 2712 masters.
Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
drivers: pcie: brcmstb: optionally enable QoS features by DT for BCM2712
It's a bad idea to universally enable "realtime" priorities for TCs
across all the RC instances on the chip. Endpoints other than RP1 may
make use of these, so you don't want e.g. NVMe descriptor fetches getting
higher priority than your remote display.
Add two optional DT properties controlling the behaviour - FIFO-based
backpressure QoS or "message-based". Message-based signalling is
fundamentally broken due to a chip bug, so it collapses into a set of
static assignments that RP1 needs.
The default if neither property is specified is to assign everything a
QoS of 0.
Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
drivers: pcie: brcmstb: adjust completion timeouts for bcm2712
Setting the RC config retry timeout makes CRS auto-polling work, but
the UBUS timeout will override the config retry. Both need to be large.
Signed-off-by: Jonathan Bell <jonathan@raspberrypi.com>
---
drivers/pci/controller/pcie-brcmstb.c | 494 +++++++++++++++++++++++---
1 file changed, 447 insertions(+), 47 deletions(-)
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -14,6 +14,7 @@
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
#include <linux/kernel.h>
+#include <linux/kthread.h>
#include <linux/list.h>
#include <linux/log2.h>
#include <linux/module.h>
@@ -48,10 +49,23 @@
#define PCIE_RC_CFG_PRIV1_LINK_CAPABILITY 0x04dc
#define PCIE_RC_CFG_PRIV1_LINK_CAPABILITY_ASPM_SUPPORT_MASK 0xc00
+#define PCIE_RC_TL_VDM_CTL0 0x0a20
+#define PCIE_RC_TL_VDM_CTL0_VDM_ENABLED_MASK 0x10000
+#define PCIE_RC_TL_VDM_CTL0_VDM_IGNORETAG_MASK 0x20000
+#define PCIE_RC_TL_VDM_CTL0_VDM_IGNOREVNDRID_MASK 0x40000
+
+#define PCIE_RC_TL_VDM_CTL1 0x0a0c
+#define PCIE_RC_TL_VDM_CTL1_VDM_VNDRID0_MASK 0x0000ffff
+#define PCIE_RC_TL_VDM_CTL1_VDM_VNDRID1_MASK 0xffff0000
+
#define PCIE_RC_DL_MDIO_ADDR 0x1100
#define PCIE_RC_DL_MDIO_WR_DATA 0x1104
#define PCIE_RC_DL_MDIO_RD_DATA 0x1108
+#define PCIE_RC_PL_PHY_CTL_15 0x184c
+#define PCIE_RC_PL_PHY_CTL_15_DIS_PLL_PD_MASK 0x400000
+#define PCIE_RC_PL_PHY_CTL_15_PM_CLK_PERIOD_MASK 0xff
+
#define PCIE_MISC_MISC_CTRL 0x4008
#define PCIE_MISC_MISC_CTRL_PCIE_RCB_64B_MODE_MASK 0x80
#define PCIE_MISC_MISC_CTRL_PCIE_RCB_MPS_MODE_MASK 0x400
@@ -74,6 +88,7 @@
#define PCIE_MISC_RC_BAR1_CONFIG_LO 0x402c
#define PCIE_MISC_RC_BAR1_CONFIG_LO_SIZE_MASK 0x1f
+#define PCIE_MISC_RC_BAR1_CONFIG_HI 0x4030
#define PCIE_MISC_RC_BAR2_CONFIG_LO 0x4034
#define PCIE_MISC_RC_BAR2_CONFIG_LO_SIZE_MASK 0x1f
@@ -81,6 +96,7 @@
#define PCIE_MISC_RC_BAR3_CONFIG_LO 0x403c
#define PCIE_MISC_RC_BAR3_CONFIG_LO_SIZE_MASK 0x1f
+#define PCIE_MISC_RC_BAR3_CONFIG_HI 0x4040
#define PCIE_MISC_MSI_BAR_CONFIG_LO 0x4044
#define PCIE_MISC_MSI_BAR_CONFIG_HI 0x4048
@@ -89,12 +105,15 @@
#define PCIE_MISC_MSI_DATA_CONFIG_VAL_32 0xffe06540
#define PCIE_MISC_MSI_DATA_CONFIG_VAL_8 0xfff86540
+#define PCIE_MISC_RC_CONFIG_RETRY_TIMEOUT 0x405c
+
#define PCIE_MISC_PCIE_CTRL 0x4064
#define PCIE_MISC_PCIE_CTRL_PCIE_L23_REQUEST_MASK 0x1
#define PCIE_MISC_PCIE_CTRL_PCIE_PERSTB_MASK 0x4
#define PCIE_MISC_PCIE_STATUS 0x4068
#define PCIE_MISC_PCIE_STATUS_PCIE_PORT_MASK 0x80
+#define PCIE_MISC_PCIE_STATUS_PCIE_PORT_MASK_2712 0x40
#define PCIE_MISC_PCIE_STATUS_PCIE_DL_ACTIVE_MASK 0x20
#define PCIE_MISC_PCIE_STATUS_PCIE_PHYLINKUP_MASK 0x10
#define PCIE_MISC_PCIE_STATUS_PCIE_LINK_IN_L23_MASK 0x40
@@ -119,14 +138,73 @@
#define PCIE_MEM_WIN0_LIMIT_HI(win) \
PCIE_MISC_CPU_2_PCIE_MEM_WIN0_LIMIT_HI + ((win) * 8)
-#define PCIE_MISC_HARD_PCIE_HARD_DEBUG 0x4204
+#define PCIE_MISC_HARD_PCIE_HARD_DEBUG pcie->reg_offsets[PCIE_HARD_DEBUG]
#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK 0x2
#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK 0x08000000
#define PCIE_BMIPS_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK 0x00800000
#define PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_L1SS_ENABLE_MASK 0x00200000
+#define PCIE_MISC_CTRL_1 0x40A0
+#define PCIE_MISC_CTRL_1_OUTBOUND_TC_MASK 0xf
+#define PCIE_MISC_CTRL_1_OUTBOUND_NO_SNOOP_MASK BIT(3)
+#define PCIE_MISC_CTRL_1_OUTBOUND_RO_MASK BIT(4)
+#define PCIE_MISC_CTRL_1_EN_VDM_QOS_CONTROL_MASK BIT(5)
+
+#define PCIE_MISC_UBUS_CTRL 0x40a4
+#define PCIE_MISC_UBUS_CTRL_UBUS_PCIE_REPLY_ERR_DIS_MASK BIT(13)
+#define PCIE_MISC_UBUS_CTRL_UBUS_PCIE_REPLY_DECERR_DIS_MASK BIT(19)
+
+#define PCIE_MISC_UBUS_TIMEOUT 0x40A8
+
+#define PCIE_MISC_UBUS_BAR1_CONFIG_REMAP 0x40ac
+#define PCIE_MISC_UBUS_BAR1_CONFIG_REMAP_ACCESS_ENABLE_MASK BIT(0)
+#define PCIE_MISC_UBUS_BAR1_CONFIG_REMAP_HI 0x40b0
+
+#define PCIE_MISC_UBUS_BAR2_CONFIG_REMAP 0x40b4
+#define PCIE_MISC_UBUS_BAR2_CONFIG_REMAP_ACCESS_ENABLE_MASK BIT(0)
+
+/* Additional RC BARs */
+#define PCIE_MISC_RC_BAR_CONFIG_LO_SIZE_MASK 0x1f
+#define PCIE_MISC_RC_BAR4_CONFIG_LO 0x40d4
+#define PCIE_MISC_RC_BAR4_CONFIG_HI 0x40d8
+/* ... */
+#define PCIE_MISC_RC_BAR10_CONFIG_LO 0x4104
+#define PCIE_MISC_RC_BAR10_CONFIG_HI 0x4108
+
+#define PCIE_MISC_UBUS_BAR_CONFIG_REMAP_ENABLE 0x1
+#define PCIE_MISC_UBUS_BAR_CONFIG_REMAP_LO_MASK 0xfffff000
+#define PCIE_MISC_UBUS_BAR_CONFIG_REMAP_HI_MASK 0xff
+#define PCIE_MISC_UBUS_BAR4_CONFIG_REMAP_LO 0x410c
+#define PCIE_MISC_UBUS_BAR4_CONFIG_REMAP_HI 0x4110
+/* ... */
+#define PCIE_MISC_UBUS_BAR10_CONFIG_REMAP_LO 0x413c
+#define PCIE_MISC_UBUS_BAR10_CONFIG_REMAP_HI 0x4140
+
+/* AXI priority forwarding - automatic level-based */
+#define PCIE_MISC_TC_QUEUE_TO_QOS_MAP(x) (0x4160 - (x) * 4)
+/* Defined in quarter-fullness */
+#define QUEUE_THRESHOLD_34_TO_QOS_MAP_SHIFT 12
+#define QUEUE_THRESHOLD_23_TO_QOS_MAP_SHIFT 8
+#define QUEUE_THRESHOLD_12_TO_QOS_MAP_SHIFT 4
+#define QUEUE_THRESHOLD_01_TO_QOS_MAP_SHIFT 0
+#define QUEUE_THRESHOLD_MASK 0xf
+
+/* VDM messages indexing TCs to AXI priorities */
+/* Indexes 8-15 */
+#define PCIE_MISC_VDM_PRIORITY_TO_QOS_MAP_HI 0x4164
+/* Indexes 0-7 */
+#define PCIE_MISC_VDM_PRIORITY_TO_QOS_MAP_LO 0x4168
+#define VDM_PRIORITY_TO_QOS_MAP_SHIFT(x) (4 * (x))
+#define VDM_PRIORITY_TO_QOS_MAP_MASK 0xf
+
+#define PCIE_MISC_AXI_INTF_CTRL 0x416C
+#define AXI_REQFIFO_EN_QOS_PROPAGATION BIT(7)
+#define AXI_BRIDGE_LOW_LATENCY_MODE BIT(6)
+#define AXI_MASTER_MAX_OUTSTANDING_REQUESTS_MASK 0x3f
-#define PCIE_INTR2_CPU_BASE 0x4300
+#define PCIE_MISC_AXI_READ_ERROR_DATA 0x4170
+
+#define PCIE_INTR2_CPU_BASE (pcie->reg_offsets[INTR2_CPU])
#define PCIE_MSI_INTR2_BASE 0x4500
/* Offsets from PCIE_INTR2_CPU_BASE and PCIE_MSI_INTR2_BASE */
#define MSI_INT_STATUS 0x0
@@ -200,6 +278,8 @@ enum {
RGR1_SW_INIT_1,
EXT_CFG_INDEX,
EXT_CFG_DATA,
+ PCIE_HARD_DEBUG,
+ INTR2_CPU,
};
enum {
@@ -214,6 +294,7 @@ enum pcie_type {
BCM4908,
BCM7278,
BCM2711,
+ BCM2712,
};
struct pcie_cfg_data {
@@ -221,6 +302,7 @@ struct pcie_cfg_data {
const enum pcie_type type;
void (*perst_set)(struct brcm_pcie *pcie, u32 val);
void (*bridge_sw_init_set)(struct brcm_pcie *pcie, u32 val);
+ bool (*rc_mode)(struct brcm_pcie *pcie);
};
struct subdev_regulators {
@@ -237,7 +319,7 @@ struct brcm_msi {
struct mutex lock; /* guards the alloc/free operations */
u64 target_addr;
int irq;
- DECLARE_BITMAP(used, BRCM_INT_PCI_MSI_NR);
+ DECLARE_BITMAP(used, 64);
bool legacy;
/* Some chips have MSIs in bits [31..24] of a shared register. */
int legacy_shift;
@@ -261,11 +343,14 @@ struct brcm_pcie {
enum pcie_type type;
struct reset_control *rescal;
struct reset_control *perst_reset;
+ struct reset_control *bridge_reset;
int num_memc;
u64 memc_size[PCIE_BRCM_MAX_MEMC];
u32 hw_rev;
+ u32 qos_map;
void (*perst_set)(struct brcm_pcie *pcie, u32 val);
void (*bridge_sw_init_set)(struct brcm_pcie *pcie, u32 val);
+ bool (*rc_mode)(struct brcm_pcie *pcie);
struct subdev_regulators *sr;
bool ep_wakeup_capable;
};
@@ -286,8 +371,8 @@ static int brcm_pcie_encode_ibar_size(u6
if (log2_in >= 12 && log2_in <= 15)
/* Covers 4KB to 32KB (inclusive) */
return (log2_in - 12) + 0x1c;
- else if (log2_in >= 16 && log2_in <= 35)
- /* Covers 64KB to 32GB, (inclusive) */
+ else if (log2_in >= 16 && log2_in <= 36)
+ /* Covers 64KB to 64GB, (inclusive) */
return log2_in - 15;
/* Something is awry so disable */
return 0;
@@ -376,6 +461,35 @@ static int brcm_pcie_set_ssc(struct brcm
return ssc && pll ? 0 : -EIO;
}
+static void brcm_pcie_munge_pll(struct brcm_pcie *pcie)
+{
+ //print "MDIO block 0x1600 written per Dannys instruction"
+ //tmp = pcie_mdio_write(phyad, &h16&, &h50b9&)
+ //tmp = pcie_mdio_write(phyad, &h17&, &hbd1a&)
+ //tmp = pcie_mdio_write(phyad, &h1b&, &h5030&)
+ //tmp = pcie_mdio_write(phyad, &h1e&, &h0007&)
+
+ u32 tmp;
+ int ret, i;
+ u8 regs[] = { 0x16, 0x17, 0x18, 0x19, 0x1b, 0x1c, 0x1e };
+ u16 data[] = { 0x50b9, 0xbda1, 0x0094, 0x97b4, 0x5030, 0x5030, 0x0007 };
+
+ ret = brcm_pcie_mdio_write(pcie->base, MDIO_PORT0, SET_ADDR_OFFSET,
+ 0x1600);
+ for (i = 0; i < ARRAY_SIZE(regs); i++) {
+ brcm_pcie_mdio_read(pcie->base, MDIO_PORT0, regs[i], &tmp);
+ dev_dbg(pcie->dev, "PCIE MDIO pre_refclk 0x%02x = 0x%04x\n",
+ regs[i], tmp);
+ }
+ for (i = 0; i < ARRAY_SIZE(regs); i++) {
+ brcm_pcie_mdio_write(pcie->base, MDIO_PORT0, regs[i], data[i]);
+ brcm_pcie_mdio_read(pcie->base, MDIO_PORT0, regs[i], &tmp);
+ dev_dbg(pcie->dev, "PCIE MDIO post_refclk 0x%02x = 0x%04x\n",
+ regs[i], tmp);
+ }
+ usleep_range(100, 200);
+}
+
/* Limits operation to a specific generation (1, 2, or 3) */
static void brcm_pcie_set_gen(struct brcm_pcie *pcie, int gen)
{
@@ -433,6 +547,97 @@ static void brcm_pcie_set_outbound_win(s
writel(tmp, pcie->base + PCIE_MEM_WIN0_LIMIT_HI(win));
}
+static void brcm_pcie_set_tc_qos(struct brcm_pcie *pcie)
+{
+ int i;
+ u32 reg;
+
+ if (pcie->type != BCM2712)
+ return;
+
+ /* XXX: BCM2712C0 is broken, disable the forwarding search */
+ reg = readl(pcie->base + PCIE_MISC_AXI_INTF_CTRL);
+ reg &= ~AXI_REQFIFO_EN_QOS_PROPAGATION;
+ writel(reg, pcie->base + PCIE_MISC_AXI_INTF_CTRL);
+
+ /* Disable VDM reception by default - QoS map defaults to 0 */
+ reg = readl(pcie->base + PCIE_MISC_CTRL_1);
+ reg &= ~PCIE_MISC_CTRL_1_EN_VDM_QOS_CONTROL_MASK;
+ writel(reg, pcie->base + PCIE_MISC_CTRL_1);
+
+ if (!of_property_read_u32(pcie->np, "brcm,fifo-qos-map", &pcie->qos_map)) {
+ /*
+ * Backpressure mode - bottom 4 nibbles are QoS for each
+ * quartile of FIFO level. Each TC gets the same map, because
+ * this mode is intended for nonrealtime EPs.
+ */
+
+ pcie->qos_map &= 0x0000ffff;
+ for (i = 0; i < 8; i++)
+ writel(pcie->qos_map, pcie->base + PCIE_MISC_TC_QUEUE_TO_QOS_MAP(i));
+
+ return;
+ }
+
+ if (!of_property_read_u32(pcie->np, "brcm,vdm-qos-map", &pcie->qos_map)) {
+
+ reg = readl(pcie->base + PCIE_MISC_CTRL_1);
+ reg |= PCIE_MISC_CTRL_1_EN_VDM_QOS_CONTROL_MASK;
+ writel(reg, pcie->base + PCIE_MISC_CTRL_1);
+
+ /* No forwarding means no point separating panic priorities from normal */
+ writel(pcie->qos_map, pcie->base + PCIE_MISC_VDM_PRIORITY_TO_QOS_MAP_LO);
+ writel(pcie->qos_map, pcie->base + PCIE_MISC_VDM_PRIORITY_TO_QOS_MAP_HI);
+
+ /* Match Vendor ID of 0 */
+ writel(0, pcie->base + PCIE_RC_TL_VDM_CTL1);
+ /* Forward VDMs to priority interface - at least the rx counters work */
+ reg = readl(pcie->base + PCIE_RC_TL_VDM_CTL0);
+ reg |= PCIE_RC_TL_VDM_CTL0_VDM_ENABLED_MASK |
+ PCIE_RC_TL_VDM_CTL0_VDM_IGNORETAG_MASK |
+ PCIE_RC_TL_VDM_CTL0_VDM_IGNOREVNDRID_MASK;
+ writel(reg, pcie->base + PCIE_RC_TL_VDM_CTL0);
+ }
+}
+
+static void brcm_pcie_config_clkreq(struct brcm_pcie *pcie)
+{
+ void __iomem *base = pcie->base;
+ struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
+ int domain = pci_domain_nr(bridge->bus);
+ const struct pci_bus *bus = pci_find_bus(domain, 1);
+ struct pci_dev *pdev = (struct pci_dev *)bus->devices.next;
+ u32 tmp, link_cap = 0;
+ u16 link_ctl = 0;
+ int clkpm = 0;
+ int substates = 0;
+
+ pcie_capability_read_dword(pdev, PCI_EXP_LNKCAP, &link_cap);
+ if ((link_cap & PCI_EXP_LNKCAP_CLKPM))
+ clkpm = 1;
+
+ pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &link_ctl);
+ if (!(link_ctl & PCI_EXP_LNKCTL_CLKREQ_EN))
+ clkpm = 0;
+
+ if (pcie->l1ss && pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_L1SS))
+ substates = 1;
+
+ tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+ tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK;
+ tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_L1SS_ENABLE_MASK;
+
+ if (substates)
+ tmp |= PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_L1SS_ENABLE_MASK;
+ else if (clkpm)
+ tmp |= PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK;
+
+ writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+
+ if (substates || clkpm)
+ dev_info(pcie->dev, "clkreq control enabled\n");
+}
+
static struct irq_chip brcm_msi_irq_chip = {
.name = "BRCM STB PCIe MSI",
.irq_ack = irq_chip_ack_parent,
@@ -449,7 +654,7 @@ static struct msi_domain_info brcm_msi_d
static void brcm_pcie_msi_isr(struct irq_desc *desc)
{
struct irq_chip *chip = irq_desc_get_chip(desc);
- unsigned long status;
+ unsigned long status, virq;
struct brcm_msi *msi;
struct device *dev;
u32 bit;
@@ -461,10 +666,22 @@ static void brcm_pcie_msi_isr(struct irq
status = readl(msi->intr_base + MSI_INT_STATUS);
status >>= msi->legacy_shift;
- for_each_set_bit(bit, &status, msi->nr) {
- int ret;
- ret = generic_handle_domain_irq(msi->inner_domain, bit);
- if (ret)
+ for_each_set_bit(bit, &status, BRCM_INT_PCI_MSI_NR/*msi->nr*/) {
+ bool found = false;
+
+ virq = irq_find_mapping(msi->inner_domain, bit);
+ if (virq) {
+ found = true;
+ dev_dbg(dev, "MSI -> %ld\n", virq);
+ generic_handle_irq(virq);
+ }
+ virq = irq_find_mapping(msi->inner_domain, bit + 32);
+ if (virq) {
+ found = true;
+ dev_dbg(dev, "MSI -> %ld\n", virq);
+ generic_handle_irq(virq);
+ }
+ if (!found)
dev_dbg(dev, "unexpected MSI\n");
}
@@ -477,7 +694,7 @@ static void brcm_msi_compose_msi_msg(str
msg->address_lo = lower_32_bits(msi->target_addr);
msg->address_hi = upper_32_bits(msi->target_addr);
- msg->data = (0xffff & PCIE_MISC_MSI_DATA_CONFIG_VAL_32) | data->hwirq;
+ msg->data = (0xffff & PCIE_MISC_MSI_DATA_CONFIG_VAL_32) | (data->hwirq & 0x1f);
}
static int brcm_msi_set_affinity(struct irq_data *irq_data,
@@ -489,7 +706,7 @@ static int brcm_msi_set_affinity(struct
static void brcm_msi_ack_irq(struct irq_data *data)
{
struct brcm_msi *msi = irq_data_get_irq_chip_data(data);
- const int shift_amt = data->hwirq + msi->legacy_shift;
+ const int shift_amt = (data->hwirq & 0x1f) + msi->legacy_shift;
writel(1 << shift_amt, msi->intr_base + MSI_INT_CLR);
}
@@ -650,7 +867,7 @@ static int brcm_pcie_enable_msi(struct b
msi->legacy_shift = 24;
} else {
msi->intr_base = msi->base + PCIE_MSI_INTR2_BASE;
- msi->nr = BRCM_INT_PCI_MSI_NR;
+ msi->nr = 64; //BRCM_INT_PCI_MSI_NR;
msi->legacy_shift = 0;
}
@@ -667,7 +884,7 @@ static int brcm_pcie_enable_msi(struct b
}
/* The controller is capable of serving in both RC and EP roles */
-static bool brcm_pcie_rc_mode(struct brcm_pcie *pcie)
+static bool brcm_pcie_rc_mode_generic(struct brcm_pcie *pcie)
{
void __iomem *base = pcie->base;
u32 val = readl(base + PCIE_MISC_PCIE_STATUS);
@@ -675,6 +892,14 @@ static bool brcm_pcie_rc_mode(struct brc
return !!FIELD_GET(PCIE_MISC_PCIE_STATUS_PCIE_PORT_MASK, val);
}
+static bool brcm_pcie_rc_mode_2712(struct brcm_pcie *pcie)
+{
+ void __iomem *base = pcie->base;
+ u32 val = readl(base + PCIE_MISC_PCIE_STATUS);
+
+ return !!FIELD_GET(PCIE_MISC_PCIE_STATUS_PCIE_PORT_MASK_2712, val) | 1; //XXX
+}
+
static bool brcm_pcie_link_up(struct brcm_pcie *pcie)
{
u32 val = readl(pcie->base + PCIE_MISC_PCIE_STATUS);
@@ -746,6 +971,18 @@ static void brcm_pcie_bridge_sw_init_set
writel(tmp, pcie->base + PCIE_RGR1_SW_INIT_1(pcie));
}
+static void brcm_pcie_bridge_sw_init_set_2712(struct brcm_pcie *pcie, u32 val)
+{
+ if (WARN_ONCE(!pcie->bridge_reset,
+ "missing bridge reset controller\n"))
+ return;
+
+ if (val)
+ reset_control_assert(pcie->bridge_reset);
+ else
+ reset_control_deassert(pcie->bridge_reset);
+}
+
static void brcm_pcie_perst_set_4908(struct brcm_pcie *pcie, u32 val)
{
if (WARN_ONCE(!pcie->perst_reset, "missing PERST# reset controller\n"))
@@ -767,6 +1004,16 @@ static void brcm_pcie_perst_set_7278(str
writel(tmp, pcie->base + PCIE_MISC_PCIE_CTRL);
}
+static void brcm_pcie_perst_set_2712(struct brcm_pcie *pcie, u32 val)
+{
+ u32 tmp;
+
+ /* Perst bit has moved and assert value is 0 */
+ tmp = readl(pcie->base + PCIE_MISC_PCIE_CTRL);
+ u32p_replace_bits(&tmp, !val, PCIE_MISC_PCIE_CTRL_PCIE_PERSTB_MASK);
+ writel(tmp, pcie->base + PCIE_MISC_PCIE_CTRL);
+}
+
static void brcm_pcie_perst_set_generic(struct brcm_pcie *pcie, u32 val)
{
u32 tmp;
@@ -793,6 +1040,8 @@ static int brcm_pcie_get_rc_bar2_size_an
size += entry->res->end - entry->res->start + 1;
if (pcie_beg < lowest_pcie_addr)
lowest_pcie_addr = pcie_beg;
+ if (pcie->type == BCM2711 || pcie->type == BCM2712)
+ break; // Only consider the first entry
}
if (lowest_pcie_addr == ~(u64)0) {
@@ -863,6 +1112,30 @@ static int brcm_pcie_get_rc_bar2_size_an
return 0;
}
+static int brcm_pcie_get_rc_bar_n(struct brcm_pcie *pcie,
+ int idx,
+ u64 *rc_bar_cpu,
+ u64 *rc_bar_size,
+ u64 *rc_bar_pci)
+{
+ struct pci_host_bridge *bridge = pci_host_bridge_from_priv(pcie);
+ struct resource_entry *entry;
+ int i = 0;
+
+ resource_list_for_each_entry(entry, &bridge->dma_ranges) {
+ if (i == idx) {
+ *rc_bar_cpu = entry->res->start;
+ *rc_bar_size = entry->res->end - entry->res->start + 1;
+ *rc_bar_pci = entry->res->start - entry->offset;
+ return 0;
+ }
+
+ i++;
+ }
+
+ return -EINVAL;
+}
+
static int brcm_pcie_setup(struct brcm_pcie *pcie)
{
u64 rc_bar2_offset, rc_bar2_size;
@@ -871,7 +1144,7 @@ static int brcm_pcie_setup(struct brcm_p
struct resource_entry *entry;
u32 tmp, burst, aspm_support;
int num_out_wins = 0;
- int ret, memc;
+ int ret, memc, count, i;
/* Reset the bridge */
pcie->bridge_sw_init_set(pcie, 1);
@@ -894,6 +1167,17 @@ static int brcm_pcie_setup(struct brcm_p
/* Wait for SerDes to be stable */
usleep_range(100, 200);
+ if (pcie->type == BCM2712) {
+ /* Allow a 54MHz (xosc) refclk source */
+ brcm_pcie_munge_pll(pcie);
+ /* Fix for L1SS errata */
+ tmp = readl(base + PCIE_RC_PL_PHY_CTL_15);
+ tmp &= ~PCIE_RC_PL_PHY_CTL_15_PM_CLK_PERIOD_MASK;
+ /* PM clock period is 18.52ns (round down) */
+ tmp |= 0x12;
+ writel(tmp, base + PCIE_RC_PL_PHY_CTL_15);
+ }
+
/*
* SCB_MAX_BURST_SIZE is a two bit field. For GENERIC chips it
* is encoded as 0=128, 1=256, 2=512, 3=Rsvd, for BCM7278 it
@@ -903,6 +1187,8 @@ static int brcm_pcie_setup(struct brcm_p
burst = 0x1; /* 256 bytes */
else if (pcie->type == BCM2711)
burst = 0x0; /* 128 bytes */
+ else if (pcie->type == BCM2712)
+ burst = 0x1; /* 128 bytes */
else if (pcie->type == BCM7278)
burst = 0x3; /* 512 bytes */
else
@@ -920,6 +1206,8 @@ static int brcm_pcie_setup(struct brcm_p
u32p_replace_bits(&tmp, 1, PCIE_MISC_MISC_CTRL_PCIE_RCB_64B_MODE_MASK);
writel(tmp, base + PCIE_MISC_MISC_CTRL);
+ brcm_pcie_set_tc_qos(pcie);
+
ret = brcm_pcie_get_rc_bar2_size_and_offset(pcie, &rc_bar2_size,
&rc_bar2_offset);
if (ret)
@@ -932,7 +1220,11 @@ static int brcm_pcie_setup(struct brcm_p
writel(upper_32_bits(rc_bar2_offset),
base + PCIE_MISC_RC_BAR2_CONFIG_HI);
+ tmp = readl(base + PCIE_MISC_UBUS_BAR2_CONFIG_REMAP);
+ u32p_replace_bits(&tmp, 1, PCIE_MISC_UBUS_BAR2_CONFIG_REMAP_ACCESS_ENABLE_MASK);
+ writel(tmp, base + PCIE_MISC_UBUS_BAR2_CONFIG_REMAP);
tmp = readl(base + PCIE_MISC_MISC_CTRL);
+
for (memc = 0; memc < pcie->num_memc; memc++) {
u32 scb_size_val = ilog2(pcie->memc_size[memc]) - 15;
@@ -943,8 +1235,32 @@ static int brcm_pcie_setup(struct brcm_p
else if (memc == 2)
u32p_replace_bits(&tmp, scb_size_val, SCB_SIZE_MASK(2));
}
+
writel(tmp, base + PCIE_MISC_MISC_CTRL);
+ if (pcie->type == BCM2712) {
+ /* Suppress AXI error responses and return 1s for read failures */
+ tmp = readl(base + PCIE_MISC_UBUS_CTRL);
+ u32p_replace_bits(&tmp, 1, PCIE_MISC_UBUS_CTRL_UBUS_PCIE_REPLY_ERR_DIS_MASK);
+ u32p_replace_bits(&tmp, 1, PCIE_MISC_UBUS_CTRL_UBUS_PCIE_REPLY_DECERR_DIS_MASK);
+ writel(tmp, base + PCIE_MISC_UBUS_CTRL);
+ writel(0xffffffff, base + PCIE_MISC_AXI_READ_ERROR_DATA);
+
+ /*
+ * Adjust timeouts. The UBUS timeout also affects CRS
+ * completion retries, as the request will get terminated if
+ * either timeout expires, so both have to be a large value
+ * (in clocks of 750MHz).
+ * Set UBUS timeout to 250ms, then set RC config retry timeout
+ * to be ~240ms.
+ *
+ * Setting CRSVis=1 will stop the core from blocking on a CRS
+ * response, but does require the device to be well-behaved...
+ */
+ writel(0xB2D0000, base + PCIE_MISC_UBUS_TIMEOUT);
+ writel(0xABA0000, base + PCIE_MISC_RC_CONFIG_RETRY_TIMEOUT);
+ }
+
/*
* We ideally want the MSI target address to be located in the 32bit
* addressable memory area. Some devices might depend on it. This is
@@ -957,7 +1273,7 @@ static int brcm_pcie_setup(struct brcm_p
else
pcie->msi_target_addr = BRCM_MSI_TARGET_ADDR_GT_4GB;
- if (!brcm_pcie_rc_mode(pcie)) {
+ if (!pcie->rc_mode(pcie)) {
dev_err(pcie->dev, "PCIe RC controller misconfigured as Endpoint\n");
return -EINVAL;
}
@@ -981,6 +1297,38 @@ static int brcm_pcie_setup(struct brcm_p
PCIE_RC_CFG_PRIV1_LINK_CAPABILITY_ASPM_SUPPORT_MASK);
writel(tmp, base + PCIE_RC_CFG_PRIV1_LINK_CAPABILITY);
+ /* program additional inbound windows (RC_BAR4..RC_BAR10) */
+ count = (pcie->type == BCM2712) ? 7 : 0;
+ for (i = 0; i < count; i++) {
+ u64 bar_cpu, bar_size, bar_pci;
+
+ ret = brcm_pcie_get_rc_bar_n(pcie, 1 + i, &bar_cpu, &bar_size,
+ &bar_pci);
+ if (ret)
+ break;
+
+ tmp = lower_32_bits(bar_pci);
+ u32p_replace_bits(&tmp, brcm_pcie_encode_ibar_size(bar_size),
+ PCIE_MISC_RC_BAR_CONFIG_LO_SIZE_MASK);
+ writel(tmp, base + PCIE_MISC_RC_BAR4_CONFIG_LO + i * 8);
+ writel(upper_32_bits(bar_pci),
+ base + PCIE_MISC_RC_BAR4_CONFIG_HI + i * 8);
+
+ tmp = upper_32_bits(bar_cpu) &
+ PCIE_MISC_UBUS_BAR_CONFIG_REMAP_HI_MASK;
+ writel(tmp,
+ base + PCIE_MISC_UBUS_BAR4_CONFIG_REMAP_HI + i * 8);
+ tmp = lower_32_bits(bar_cpu) &
+ PCIE_MISC_UBUS_BAR_CONFIG_REMAP_LO_MASK;
+ writel(tmp | PCIE_MISC_UBUS_BAR_CONFIG_REMAP_ENABLE,
+ base + PCIE_MISC_UBUS_BAR4_CONFIG_REMAP_LO + i * 8);
+ }
+
+ if (pcie->gen) {
+ dev_info(pcie->dev, "Forcing gen %d\n", pcie->gen);
+ brcm_pcie_set_gen(pcie, pcie->gen);
+ }
+
/*
* For config space accesses on the RC, show the right class for
* a PCIe-PCIe bridge (the default setting is to be EP mode).
@@ -1036,7 +1384,6 @@ static int brcm_pcie_start_link(struct b
void __iomem *base = pcie->base;
u16 nlw, cls, lnksta;
bool ssc_good = false;
- u32 tmp;
int ret, i;
/* Unassert the fundamental reset */
@@ -1072,6 +1419,7 @@ static int brcm_pcie_start_link(struct b
dev_err(dev, "failed attempt to enter ssc mode\n");
}
+
lnksta = readw(base + BRCM_PCIE_CAP_REGS + PCI_EXP_LNKSTA);
cls = FIELD_GET(PCI_EXP_LNKSTA_CLS, lnksta);
nlw = FIELD_GET(PCI_EXP_LNKSTA_NLW, lnksta);
@@ -1079,27 +1427,6 @@ static int brcm_pcie_start_link(struct b
pci_speed_string(pcie_link_speed[cls]), nlw,
ssc_good ? "(SSC)" : "(!SSC)");
- tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
- if (pcie->l1ss) {
- /*
- * Enable CLKREQ# signalling include L1 Substate control of
- * the CLKREQ# signal and the external reference clock buffer.
- * meet requirement for Endpoints that require CLKREQ#
- * assertion to clock active within 400ns.
- */
- tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK;
- tmp |= PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_L1SS_ENABLE_MASK;
- } else {
- /*
- * Refclk from RC should be gated with CLKREQ# input when
- * ASPM L0s,L1 is enabled => setting the CLKREQ_DEBUG_ENABLE
- * field to 1.
- */
- tmp &= ~PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_L1SS_ENABLE_MASK;
- tmp |= PCIE_MISC_HARD_PCIE_HARD_DEBUG_CLKREQ_DEBUG_ENABLE_MASK;
- }
- writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
-
return 0;
}
@@ -1207,6 +1534,7 @@ static void brcm_pcie_enter_l23(struct b
static int brcm_phy_cntl(struct brcm_pcie *pcie, const int start)
{
+#if 0
static const u32 shifts[PCIE_DVT_PMU_PCIE_PHY_CTRL_DAST_NFLDS] = {
PCIE_DVT_PMU_PCIE_PHY_CTRL_DAST_PWRDN_SHIFT,
PCIE_DVT_PMU_PCIE_PHY_CTRL_DAST_RESET_SHIFT,
@@ -1239,6 +1567,9 @@ static int brcm_phy_cntl(struct brcm_pci
dev_err(pcie->dev, "failed to %s phy\n", (start ? "start" : "stop"));
return ret;
+#else
+ return 0;
+#endif
}
static inline int brcm_phy_start(struct brcm_pcie *pcie)
@@ -1271,6 +1602,12 @@ static void brcm_pcie_turn_off(struct br
u32p_replace_bits(&tmp, 1, PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK);
writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+ /*
+ * Shutting down this bridge on pcie1 means accesses to rescal block
+ * will hang the chip if another RC wants to assert/deassert rescal.
+ */
+ if (pcie->type == BCM2712)
+ return;
/* Shutdown PCIe bridge */
pcie->bridge_sw_init_set(pcie, 1);
}
@@ -1301,9 +1638,9 @@ static int brcm_pcie_suspend_noirq(struc
if (brcm_phy_stop(pcie))
dev_err(dev, "Could not stop phy for suspend\n");
- ret = reset_control_rearm(pcie->rescal);
+ ret = reset_control_assert(pcie->rescal);
if (ret) {
- dev_err(dev, "Could not rearm rescal reset\n");
+ dev_err(dev, "Could not assert rescal reset\n");
return ret;
}
@@ -1398,7 +1735,7 @@ err_regulator:
if (pcie->sr)
regulator_bulk_disable(pcie->sr->num_supplies, pcie->sr->supplies);
err_reset:
- reset_control_rearm(pcie->rescal);
+ reset_control_assert(pcie->rescal);
err_disable_clk:
clk_disable_unprepare(pcie->clk);
return ret;
@@ -1410,8 +1747,8 @@ static void __brcm_pcie_remove(struct br
brcm_pcie_turn_off(pcie);
if (brcm_phy_stop(pcie))
dev_err(pcie->dev, "Could not stop phy\n");
- if (reset_control_rearm(pcie->rescal))
- dev_err(pcie->dev, "Could not rearm rescal reset\n");
+ if (reset_control_assert(pcie->rescal))
+ dev_err(pcie->dev, "Could not assert rescal reset\n");
clk_disable_unprepare(pcie->clk);
}
@@ -1429,12 +1766,16 @@ static const int pcie_offsets[] = {
[RGR1_SW_INIT_1] = 0x9210,
[EXT_CFG_INDEX] = 0x9000,
[EXT_CFG_DATA] = 0x9004,
+ [PCIE_HARD_DEBUG] = 0x4204,
+ [INTR2_CPU] = 0x4300,
};
static const int pcie_offsets_bmips_7425[] = {
[RGR1_SW_INIT_1] = 0x8010,
[EXT_CFG_INDEX] = 0x8300,
[EXT_CFG_DATA] = 0x8304,
+ [PCIE_HARD_DEBUG] = 0x4204,
+ [INTR2_CPU] = 0x4300,
};
static const struct pcie_cfg_data generic_cfg = {
@@ -1442,6 +1783,7 @@ static const struct pcie_cfg_data generi
.type = GENERIC,
.perst_set = brcm_pcie_perst_set_generic,
.bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic,
+ .rc_mode = brcm_pcie_rc_mode_generic,
};
static const struct pcie_cfg_data bcm7425_cfg = {
@@ -1449,6 +1791,7 @@ static const struct pcie_cfg_data bcm742
.type = BCM7425,
.perst_set = brcm_pcie_perst_set_generic,
.bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic,
+ .rc_mode = brcm_pcie_rc_mode_generic,
};
static const struct pcie_cfg_data bcm7435_cfg = {
@@ -1463,12 +1806,15 @@ static const struct pcie_cfg_data bcm490
.type = BCM4908,
.perst_set = brcm_pcie_perst_set_4908,
.bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic,
+ .rc_mode = brcm_pcie_rc_mode_generic,
};
static const int pcie_offset_bcm7278[] = {
[RGR1_SW_INIT_1] = 0xc010,
[EXT_CFG_INDEX] = 0x9000,
[EXT_CFG_DATA] = 0x9004,
+ [PCIE_HARD_DEBUG] = 0x4204,
+ [INTR2_CPU] = 0x4300,
};
static const struct pcie_cfg_data bcm7278_cfg = {
@@ -1476,6 +1822,7 @@ static const struct pcie_cfg_data bcm727
.type = BCM7278,
.perst_set = brcm_pcie_perst_set_7278,
.bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_7278,
+ .rc_mode = brcm_pcie_rc_mode_generic,
};
static const struct pcie_cfg_data bcm2711_cfg = {
@@ -1483,10 +1830,27 @@ static const struct pcie_cfg_data bcm271
.type = BCM2711,
.perst_set = brcm_pcie_perst_set_generic,
.bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic,
+ .rc_mode = brcm_pcie_rc_mode_generic,
+};
+
+static const int pcie_offsets_bcm2712[] = {
+ [EXT_CFG_INDEX] = 0x9000,
+ [EXT_CFG_DATA] = 0x9004,
+ [PCIE_HARD_DEBUG] = 0x4304,
+ [INTR2_CPU] = 0x4400,
+};
+
+static const struct pcie_cfg_data bcm2712_cfg = {
+ .offsets = pcie_offsets_bcm2712,
+ .type = BCM2712,
+ .perst_set = brcm_pcie_perst_set_2712,
+ .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_2712,
+ .rc_mode = brcm_pcie_rc_mode_2712,
};
static const struct of_device_id brcm_pcie_match[] = {
{ .compatible = "brcm,bcm2711-pcie", .data = &bcm2711_cfg },
+ { .compatible = "brcm,bcm2712-pcie", .data = &bcm2712_cfg },
{ .compatible = "brcm,bcm4908-pcie", .data = &bcm4908_cfg },
{ .compatible = "brcm,bcm7211-pcie", .data = &generic_cfg },
{ .compatible = "brcm,bcm7278-pcie", .data = &bcm7278_cfg },
@@ -1527,7 +1891,7 @@ static int brcm_pcie_probe(struct platfo
data = of_device_get_match_data(&pdev->dev);
if (!data) {
- pr_err("failed to look up compatible string\n");
+ dev_err(&pdev->dev, "failed to look up compatible string\n");
return -EINVAL;
}
@@ -1538,6 +1902,7 @@ static int brcm_pcie_probe(struct platfo
pcie->type = data->type;
pcie->perst_set = data->perst_set;
pcie->bridge_sw_init_set = data->bridge_sw_init_set;
+ pcie->rc_mode = data->rc_mode;
pcie->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(pcie->base))
@@ -1568,14 +1933,20 @@ static int brcm_pcie_probe(struct platfo
clk_disable_unprepare(pcie->clk);
return PTR_ERR(pcie->perst_reset);
}
+ pcie->bridge_reset =
+ devm_reset_control_get_optional_exclusive(&pdev->dev, "bridge");
+ if (IS_ERR(pcie->bridge_reset)) {
+ clk_disable_unprepare(pcie->clk);
+ return PTR_ERR(pcie->bridge_reset);
+ }
- ret = reset_control_reset(pcie->rescal);
+ ret = reset_control_deassert(pcie->rescal);
if (ret)
dev_err(&pdev->dev, "failed to deassert 'rescal'\n");
ret = brcm_phy_start(pcie);
if (ret) {
- reset_control_rearm(pcie->rescal);
+ reset_control_assert(pcie->rescal);
clk_disable_unprepare(pcie->clk);
return ret;
}
@@ -1598,6 +1969,33 @@ static int brcm_pcie_probe(struct platfo
dev_err(pcie->dev, "probe of internal MSI failed");
goto fail;
}
+ } else if (pci_msi_enabled() && msi_np != pcie->np) {
+ /* Use RC_BAR1 for MIP access */
+ u64 msi_pci_addr;
+ u64 msi_phys_addr;
+
+ if (of_property_read_u64(msi_np, "brcm,msi-pci-addr", &msi_pci_addr)) {
+ dev_err(pcie->dev, "Unable to find MSI PCI address\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ if (of_property_read_u64(msi_np, "reg", &msi_phys_addr)) {
+ dev_err(pcie->dev, "Unable to find MSI physical address\n");
+ ret = -EINVAL;
+ goto fail;
+ }
+
+ writel(lower_32_bits(msi_pci_addr) | brcm_pcie_encode_ibar_size(0x1000),
+ pcie->base + PCIE_MISC_RC_BAR1_CONFIG_LO);
+ writel(upper_32_bits(msi_pci_addr),
+ pcie->base + PCIE_MISC_RC_BAR1_CONFIG_HI);
+
+ writel(lower_32_bits(msi_phys_addr) |
+ PCIE_MISC_UBUS_BAR1_CONFIG_REMAP_ACCESS_ENABLE_MASK,
+ pcie->base + PCIE_MISC_UBUS_BAR1_CONFIG_REMAP);
+ writel(upper_32_bits(msi_phys_addr),
+ pcie->base + PCIE_MISC_UBUS_BAR1_CONFIG_REMAP_HI);
}
bridge->ops = pcie->type == BCM7425 ? &brcm7425_pcie_ops : &brcm_pcie_ops;
@@ -1614,6 +2012,8 @@ static int brcm_pcie_probe(struct platfo
return ret;
}
+ brcm_pcie_config_clkreq(pcie);
+
return 0;
fail:
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