[U-Boot] [PATCH 4/4] x86: queensbay: Implement PIRQ routing
Bin Meng
bmeng.cn at gmail.com
Wed Apr 22 03:56:23 CEST 2015
Implement Intel Queensbay platform-specific PIRQ routing support.
The chipset PIRQ routing setup is called in the arch_mist_init().
Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
---
arch/x86/cpu/queensbay/Makefile | 2 +-
arch/x86/cpu/queensbay/irq.c | 236 +++++++++++++++++++++++++++
arch/x86/cpu/queensbay/tnc.c | 10 +-
arch/x86/include/asm/arch-queensbay/device.h | 94 +++++++++++
arch/x86/include/asm/arch-queensbay/irq.h | 55 +++++++
arch/x86/include/asm/arch-queensbay/tnc.h | 26 ++-
arch/x86/include/asm/u-boot-x86.h | 2 +
configs/crownbay_defconfig | 1 +
include/configs/crownbay.h | 1 +
9 files changed, 423 insertions(+), 4 deletions(-)
create mode 100644 arch/x86/cpu/queensbay/irq.c
create mode 100644 arch/x86/include/asm/arch-queensbay/device.h
create mode 100644 arch/x86/include/asm/arch-queensbay/irq.h
diff --git a/arch/x86/cpu/queensbay/Makefile b/arch/x86/cpu/queensbay/Makefile
index d8761fd..4599a48 100644
--- a/arch/x86/cpu/queensbay/Makefile
+++ b/arch/x86/cpu/queensbay/Makefile
@@ -5,5 +5,5 @@
#
obj-y += fsp_configs.o
-obj-y += tnc.o topcliff.o
+obj-y += irq.o tnc.o topcliff.o
obj-$(CONFIG_PCI) += tnc_pci.o
diff --git a/arch/x86/cpu/queensbay/irq.c b/arch/x86/cpu/queensbay/irq.c
new file mode 100644
index 0000000..cf433d3
--- /dev/null
+++ b/arch/x86/cpu/queensbay/irq.c
@@ -0,0 +1,236 @@
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn at gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <errno.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <asm/pci.h>
+#include <asm/post.h>
+#include <asm/processor.h>
+#include <asm/pirq_routing.h>
+#include <asm/arch/device.h>
+#include <asm/arch/tnc.h>
+#include <asm/arch/irq.h>
+
+static struct irq_routing_table *pirq_routing_table;
+
+bool pirq_check_irq_routed(int link, u8 irq)
+{
+ u8 pirq;
+
+ pirq = x86_pci_read_config8(TNC_LPC, LINK_N2V(link));
+ pirq &= 0xf;
+
+ /* IRQ# 0/1/2/8/13 are reserved */
+ if (pirq < 3 || pirq == 8 || pirq == 13)
+ return false;
+
+ return pirq == irq ? true : false;
+}
+
+int pirq_translate_link(int link)
+{
+ return LINK_V2N(link);
+}
+
+void pirq_assign_irq(int link, u8 irq)
+{
+ /* IRQ# 0/1/2/8/13 are reserved */
+ if (irq < 3 || irq == 8 || irq == 13)
+ return;
+
+ x86_pci_write_config8(TNC_LPC, LINK_N2V(link), irq);
+}
+
+static inline void fill_irq_info(struct irq_info **slot, int *entries, u8 bus,
+ u8 device, u8 func, u8 pin, u8 pirq)
+{
+ (*slot)->bus = bus;
+ (*slot)->devfn = (device << 3) | func;
+ (*slot)->irq[pin - 1].link = LINK_N2V(pirq);
+ (*slot)->irq[pin - 1].bitmap = PIRQ_BITMAP;
+ (*entries)++;
+ (*slot)++;
+}
+
+/* PCIe port downstream INTx swizzle */
+static inline u8 pin_swizzle(u8 pin, int port)
+{
+ return (pin + port) % 4;
+}
+
+__weak int board_fill_irq_info(struct irq_info *slot)
+{
+ return 0;
+}
+
+static int create_pirq_routing_table(void)
+{
+ struct irq_routing_table *rt;
+ struct irq_info *slot;
+ int irq_entries = 0;
+ pci_dev_t tcf_bdf;
+ u8 tcf_bus, bus;
+ int i;
+
+ rt = malloc(sizeof(struct irq_routing_table));
+ if (!rt)
+ return -ENOMEM;
+ memset((char *)rt, 0, sizeof(struct irq_routing_table));
+
+ /* Populate the PIRQ table fields */
+ rt->signature = PIRQ_SIGNATURE;
+ rt->version = PIRQ_VERSION;
+ rt->rtr_bus = 0;
+ rt->rtr_devfn = (TNC_LPC_DEV << 3) | TNC_LPC_FUNC;
+ rt->rtr_vendor = PCI_VENDOR_ID_INTEL;
+ rt->rtr_device = PCI_DEVICE_ID_INTEL_ICH7_31;
+
+ slot = rt->slots;
+
+ /*
+ * Now fill in the irq_info entries in the PIRQ table
+ *
+ * We start from internal TunnelCreek PCI devices first, then
+ * followed by all the 4 PCIe ports downstream devices, including
+ * the Queensbay platform Topcliff chipset devices.
+ */
+ fill_irq_info(&slot, &irq_entries, 0, TNC_IGD_DEV,
+ TNC_IGD_FUNC, INTA, PIRQE);
+ fill_irq_info(&slot, &irq_entries, 0, TNC_SDVO_DEV,
+ TNC_SDVO_FUNC, INTA, PIRQF);
+ fill_irq_info(&slot, &irq_entries, 0, TNC_HDA_DEV,
+ TNC_HDA_FUNC, INTA, PIRQG);
+ fill_irq_info(&slot, &irq_entries, 0, TNC_PCIE0_DEV,
+ TNC_PCIE0_FUNC, INTA, PIRQE);
+ fill_irq_info(&slot, &irq_entries, 0, TNC_PCIE1_DEV,
+ TNC_PCIE1_FUNC, INTA, PIRQF);
+ fill_irq_info(&slot, &irq_entries, 0, TNC_PCIE2_DEV,
+ TNC_PCIE2_FUNC, INTA, PIRQG);
+ fill_irq_info(&slot, &irq_entries, 0, TNC_PCIE3_DEV,
+ TNC_PCIE3_FUNC, INTA, PIRQH);
+
+ /* Check which PCIe port the Topcliff chipset is connected to */
+ tcf_bdf = pci_find_device(PCI_VENDOR_ID_INTEL, 0x8800, 0);
+ tcf_bus = PCI_BUS(tcf_bdf);
+ for (i = 0; i < 4; i++) {
+ bus = x86_pci_read_config8(PCI_BDF(0, TNC_PCIE0_DEV + i, 0),
+ PCI_SECONDARY_BUS);
+ if (bus == tcf_bus)
+ break;
+ }
+
+ /* Fill in the Topcliff chipset devices' irq info */
+ if (i < 4) {
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_PCIE_PORT_DEV,
+ TCF_PCIE_PORT_FUNC, INTA, pin_swizzle(PIRQA, i));
+
+ tcf_bus++;
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_0,
+ TCF_GBE_FUNC, INTA, pin_swizzle(PIRQA, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_0,
+ TCF_GPIO_FUNC, INTA, pin_swizzle(PIRQA, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2,
+ TCF_USB1_OHCI0_FUNC, INTB, pin_swizzle(PIRQB, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2,
+ TCF_USB1_OHCI1_FUNC, INTB, pin_swizzle(PIRQB, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2,
+ TCF_USB1_OHCI2_FUNC, INTB, pin_swizzle(PIRQB, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2,
+ TCF_USB1_EHCI_FUNC, INTB, pin_swizzle(PIRQB, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2,
+ TCF_USB_DEVICE_FUNC, INTB, pin_swizzle(PIRQB, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_4,
+ TCF_SDIO0_FUNC, INTC, pin_swizzle(PIRQC, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_4,
+ TCF_SDIO1_FUNC, INTC, pin_swizzle(PIRQC, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_6,
+ TCF_SATA_FUNC, INTD, pin_swizzle(PIRQD, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_8,
+ TCF_USB2_OHCI0_FUNC, INTA, pin_swizzle(PIRQA, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_8,
+ TCF_USB2_OHCI1_FUNC, INTA, pin_swizzle(PIRQA, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_8,
+ TCF_USB2_OHCI2_FUNC, INTA, pin_swizzle(PIRQA, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_8,
+ TCF_USB2_EHCI_FUNC, INTA, pin_swizzle(PIRQA, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10,
+ TCF_DMA1_FUNC, INTB, pin_swizzle(PIRQB, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10,
+ TCF_UART0_FUNC, INTB, pin_swizzle(PIRQB, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10,
+ TCF_UART1_FUNC, INTB, pin_swizzle(PIRQB, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10,
+ TCF_UART2_FUNC, INTB, pin_swizzle(PIRQB, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10,
+ TCF_UART3_FUNC, INTB, pin_swizzle(PIRQB, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12,
+ TCF_DMA2_FUNC, INTC, pin_swizzle(PIRQC, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12,
+ TCF_SPI_FUNC, INTC, pin_swizzle(PIRQC, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12,
+ TCF_I2C_FUNC, INTC, pin_swizzle(PIRQC, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12,
+ TCF_CAN_FUNC, INTC, pin_swizzle(PIRQC, i));
+ fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12,
+ TCF_1588_FUNC, INTC, pin_swizzle(PIRQC, i));
+ }
+
+ /* Call board-specific routine to fill in add-in card's irq info */
+ irq_entries += board_fill_irq_info(slot);
+
+ rt->size = irq_entries * sizeof(struct irq_info) + 32;
+
+ pirq_routing_table = rt;
+
+ return 0;
+}
+
+void pirq_init(void)
+{
+ u32 rcba;
+
+ rcba = x86_pci_read_config32(TNC_LPC, LPC_RCBA);
+ rcba &= ~MEM_BAR_EN;
+
+ /* Make sure all internal PCI devices are using INTA */
+ writel(INTA, rcba + D02IP);
+ writel(INTA, rcba + D03IP);
+ writel(INTA, rcba + D27IP);
+ writel(INTA, rcba + D31IP);
+ writel(INTA, rcba + D23IP);
+ writel(INTA, rcba + D24IP);
+ writel(INTA, rcba + D25IP);
+ writel(INTA, rcba + D26IP);
+
+ /*
+ * Route TunnelCreek PCI device interrupt pin to PIRQ
+ *
+ * Since PCIe downstream ports received INTx are routed to PIRQ
+ * A/B/C/D directly and not configurable, we route internal PCI
+ * device's INTx to PIRQ E/F/G/H.
+ */
+ writew(PIRQE, rcba + D02IR);
+ writew(PIRQF, rcba + D03IR);
+ writew(PIRQG, rcba + D27IR);
+ writew(PIRQH, rcba + D31IR);
+ writew(PIRQE, rcba + D23IR);
+ writew(PIRQF, rcba + D24IR);
+ writew(PIRQG, rcba + D25IR);
+ writew(PIRQH, rcba + D26IR);
+
+ if (!create_pirq_routing_table()) {
+ /* Route PIRQ */
+ pirq_route_irqs(pirq_routing_table->slots,
+ get_irq_slot_count(pirq_routing_table));
+ }
+}
+
+u32 write_pirq_routing_table(u32 addr)
+{
+ return copy_pirq_routing_table(addr, pirq_routing_table);
+}
diff --git a/arch/x86/cpu/queensbay/tnc.c b/arch/x86/cpu/queensbay/tnc.c
index f756a0d..b46a7e9 100644
--- a/arch/x86/cpu/queensbay/tnc.c
+++ b/arch/x86/cpu/queensbay/tnc.c
@@ -8,7 +8,8 @@
#include <asm/io.h>
#include <asm/pci.h>
#include <asm/post.h>
-#include <asm/arch/tnc.h>
+#include <asm/arch/device.h>
+#include <asm/arch/irq.h>
#include <asm/fsp/fsp_support.h>
#include <asm/processor.h>
@@ -43,3 +44,10 @@ int arch_cpu_init(void)
return 0;
}
+
+int arch_misc_init(void)
+{
+ pirq_init();
+
+ return 0;
+}
diff --git a/arch/x86/include/asm/arch-queensbay/device.h b/arch/x86/include/asm/arch-queensbay/device.h
new file mode 100644
index 0000000..953b48f
--- /dev/null
+++ b/arch/x86/include/asm/arch-queensbay/device.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn at gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _QUEENSBAY_DEVICE_H_
+#define _QUEENSBAY_DEVICE_H_
+
+#include <pci.h>
+
+/* TunnelCreek PCI Devices */
+#define TNC_HOST_BRIDGE_DEV 0
+#define TNC_HOST_BRIDGE_FUNC 0
+#define TNC_IGD_DEV 2
+#define TNC_IGD_FUNC 0
+#define TNC_SDVO_DEV 3
+#define TNC_SDVO_FUNC 0
+#define TNC_PCIE0_DEV 23
+#define TNC_PCIE0_FUNC 0
+#define TNC_PCIE1_DEV 24
+#define TNC_PCIE1_FUNC 0
+#define TNC_PCIE2_DEV 25
+#define TNC_PCIE2_FUNC 0
+#define TNC_PCIE3_DEV 26
+#define TNC_PCIE3_FUNC 0
+#define TNC_HDA_DEV 27
+#define TNC_HDA_FUNC 0
+#define TNC_LPC_DEV 31
+#define TNC_LPC_FUNC 0
+
+#define TNC_HOST_BRIDGE \
+ PCI_BDF(0, TNC_HOST_BRIDGE_DEV, TNC_HOST_BRIDGE_FUNC)
+#define TNC_IGD \
+ PCI_BDF(0, TNC_IGD_DEV, TNC_IGD_FUNC)
+#define TNC_SDVO \
+ PCI_BDF(0, TNC_SDVO_DEV, TNC_SDVO_FUNC)
+#define TNC_PCIE0 \
+ PCI_BDF(0, TNC_PCIE0_DEV, TNC_PCIE0_FUNC)
+#define TNC_PCIE1 \
+ PCI_BDF(0, TNC_PCIE1_DEV, TNC_PCIE1_FUNC)
+#define TNC_PCIE2 \
+ PCI_BDF(0, TNC_PCIE2_DEV, TNC_PCIE2_FUNC)
+#define TNC_PCIE3 \
+ PCI_BDF(0, TNC_PCIE3_DEV, TNC_PCIE3_FUNC)
+#define TNC_HDA \
+ PCI_BDF(0, TNC_HDA_DEV, TNC_HDA_FUNC)
+#define TNC_LPC \
+ PCI_BDF(0, TNC_LPC_DEV, TNC_LPC_FUNC)
+
+/* Topcliff IOH PCI Devices */
+#define TCF_PCIE_PORT_DEV 0
+#define TCF_PCIE_PORT_FUNC 0
+
+#define TCF_DEV_0 0
+#define TCF_PKT_HUB_FUNC 0
+#define TCF_GBE_FUNC 1
+#define TCF_GPIO_FUNC 2
+
+#define TCF_DEV_2 2
+#define TCF_USB1_OHCI0_FUNC 0
+#define TCF_USB1_OHCI1_FUNC 1
+#define TCF_USB1_OHCI2_FUNC 2
+#define TCF_USB1_EHCI_FUNC 3
+#define TCF_USB_DEVICE_FUNC 4
+
+#define TCF_DEV_4 4
+#define TCF_SDIO0_FUNC 0
+#define TCF_SDIO1_FUNC 1
+
+#define TCF_DEV_6 6
+#define TCF_SATA_FUNC 0
+
+#define TCF_DEV_8 8
+#define TCF_USB2_OHCI0_FUNC 0
+#define TCF_USB2_OHCI1_FUNC 1
+#define TCF_USB2_OHCI2_FUNC 2
+#define TCF_USB2_EHCI_FUNC 3
+
+#define TCF_DEV_10 10
+#define TCF_DMA1_FUNC 0
+#define TCF_UART0_FUNC 1
+#define TCF_UART1_FUNC 2
+#define TCF_UART2_FUNC 3
+#define TCF_UART3_FUNC 4
+
+#define TCF_DEV_12 12
+#define TCF_DMA2_FUNC 0
+#define TCF_SPI_FUNC 1
+#define TCF_I2C_FUNC 2
+#define TCF_CAN_FUNC 3
+#define TCF_1588_FUNC 4
+
+#endif /* _QUEENSBAY_DEVICE_H_ */
diff --git a/arch/x86/include/asm/arch-queensbay/irq.h b/arch/x86/include/asm/arch-queensbay/irq.h
new file mode 100644
index 0000000..e7f8616
--- /dev/null
+++ b/arch/x86/include/asm/arch-queensbay/irq.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn at gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _ARCH_IRQ_H_
+#define _ARCH_IRQ_H_
+
+enum pci_int_pin {
+ INTX,
+ INTA,
+ INTB,
+ INTC,
+ INTD
+};
+
+enum pirq_pin {
+ PIRQA,
+ PIRQB,
+ PIRQC,
+ PIRQD,
+ PIRQE,
+ PIRQF,
+ PIRQG,
+ PIRQH
+};
+
+/* PIRQ link number and value conversion */
+#define LINK_V2N(link) (link - 0x60)
+#define LINK_N2V(link) (link + 0x60)
+
+#define PIRQ_BITMAP 0xdee0
+
+struct irq_info;
+
+/**
+ * board_fill_irq_info() - Board-specific irq_info fill routine
+ *
+ * This fills the irq_info table for any board-specific add-in cards.
+ *
+ * @slot: pointer to the struct irq_info that is to be filled in
+ * @return: number of entries were written to the struct irq_info
+ */
+int board_fill_irq_info(struct irq_info *slot);
+
+/**
+ * pirq_init() - Initialize platform PIRQ routing
+ *
+ * This initializes the PIRQ routing on the platform and configures all PCI
+ * devices' interrupt line register to a working IRQ number on the 8259 PIC.
+ */
+void pirq_init(void);
+
+#endif /* _ARCH_IRQ_H_ */
diff --git a/arch/x86/include/asm/arch-queensbay/tnc.h b/arch/x86/include/asm/arch-queensbay/tnc.h
index 10ea51d..2535fe8 100644
--- a/arch/x86/include/asm/arch-queensbay/tnc.h
+++ b/arch/x86/include/asm/arch-queensbay/tnc.h
@@ -7,8 +7,30 @@
#ifndef _X86_ARCH_TNC_H_
#define _X86_ARCH_TNC_H_
-#include <pci.h>
+/* Memory BAR Enable */
+#define MEM_BAR_EN 0x00000001
-#define TNC_LPC PCI_BDF(0, 31, 0)
+/* LPC PCI Configuration Registers */
+#define LPC_RCBA 0xf0
+
+/* Interupt Pin Configuration (in RCBA) */
+#define D02IP 0x3118
+#define D03IP 0x3130
+#define D23IP 0x312c
+#define D24IP 0x3128
+#define D25IP 0x3124
+#define D26IP 0x3120
+#define D27IP 0x3110
+#define D31IP 0x3100
+
+/* Interupt Route Configuration (in RCBA) */
+#define D02IR 0x3160
+#define D03IR 0x3162
+#define D23IR 0x3150
+#define D24IR 0x314e
+#define D25IR 0x314c
+#define D26IR 0x314a
+#define D27IR 0x3148
+#define D31IR 0x3140
#endif /* _X86_ARCH_TNC_H_ */
diff --git a/arch/x86/include/asm/u-boot-x86.h b/arch/x86/include/asm/u-boot-x86.h
index c743efd..122e054 100644
--- a/arch/x86/include/asm/u-boot-x86.h
+++ b/arch/x86/include/asm/u-boot-x86.h
@@ -53,6 +53,8 @@ int video_bios_init(void);
void board_init_f_r_trampoline(ulong) __attribute__ ((noreturn));
void board_init_f_r(void) __attribute__ ((noreturn));
+int arch_misc_init(void);
+
/* Read the time stamp counter */
static inline __attribute__((no_instrument_function)) uint64_t rdtsc(void)
{
diff --git a/configs/crownbay_defconfig b/configs/crownbay_defconfig
index ce90553..47763f9 100644
--- a/configs/crownbay_defconfig
+++ b/configs/crownbay_defconfig
@@ -4,3 +4,4 @@ CONFIG_TARGET_CROWNBAY=y
CONFIG_OF_CONTROL=y
CONFIG_OF_SEPARATE=y
CONFIG_DEFAULT_DEVICE_TREE="crownbay"
+CONFIG_GENERATE_PIRQ_TABLE=y
diff --git a/include/configs/crownbay.h b/include/configs/crownbay.h
index 42042d1..4fef433 100644
--- a/include/configs/crownbay.h
+++ b/include/configs/crownbay.h
@@ -15,6 +15,7 @@
#define CONFIG_SYS_MONITOR_LEN (1 << 20)
#define CONFIG_BOARD_EARLY_INIT_F
+#define CONFIG_ARCH_MISC_INIT
#define CONFIG_NR_DRAM_BANKS 1
--
1.8.2.1
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