[U-Boot] [PATCH v5 024/101] sandbox: Add PCI driver and test for p2sb
Simon Glass
sjg at chromium.org
Mon Nov 25 04:09:34 UTC 2019
Add a sandbox driver and PCI-device emulator for p2sb. Also add a test
which uses a simple 'adder' driver to test the p2sb functionality.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
Changes in v5: None
Changes in v4:
- Drop change to message about a missing uclass
- Drop empty operations struct since p2sb does not need it
- Drop pmic_pm8916 driver name and use a sandbox name instead
- Split out mmio changes into a separate patch
Changes in v3:
- Fix build errors in sandbox_spl, etc
Changes in v2: None
arch/sandbox/dts/test.dts | 13 ++
arch/sandbox/include/asm/test.h | 1 +
configs/sandbox64_defconfig | 2 +
configs/sandbox_defconfig | 3 +-
configs/sandbox_flattree_defconfig | 3 +
configs/sandbox_spl_defconfig | 2 +
configs/tools-only_defconfig | 2 +
drivers/misc/Makefile | 2 +
drivers/misc/p2sb_emul.c | 272 +++++++++++++++++++++++++++++
drivers/misc/p2sb_sandbox.c | 40 +++++
drivers/misc/sandbox_adder.c | 60 +++++++
test/dm/Makefile | 1 +
test/dm/p2sb.c | 28 +++
13 files changed, 428 insertions(+), 1 deletion(-)
create mode 100644 drivers/misc/p2sb_emul.c
create mode 100644 drivers/misc/p2sb_sandbox.c
create mode 100644 drivers/misc/sandbox_adder.c
create mode 100644 test/dm/p2sb.c
diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index 99905677ab..9c8c4e2709 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -471,6 +471,16 @@
0x01000810 0 0 0 0>;
sandbox,emul = <&swap_case_emul0_1>;
};
+ p2sb-pci at 2,0 {
+ compatible = "sandbox,p2sb";
+ reg = <0x02001010 0 0 0 0>;
+ sandbox,emul = <&p2sb_emul>;
+
+ adder {
+ intel,p2sb-port-id = <3>;
+ compatible = "sandbox,adder";
+ };
+ };
pci at 1e,0 {
compatible = "sandbox,pmc";
reg = <0xf000 0 0 0 0>;
@@ -502,6 +512,9 @@
swap_case_emul0_1f: emul0 at 1f,0 {
compatible = "sandbox,swap-case";
};
+ p2sb_emul: emul at 2,0 {
+ compatible = "sandbox,p2sb-emul";
+ };
pmc_emul1e: emul at 1e,0 {
compatible = "sandbox,pmc-emul";
};
diff --git a/arch/sandbox/include/asm/test.h b/arch/sandbox/include/asm/test.h
index fa40d21f3f..fdb0ecfed1 100644
--- a/arch/sandbox/include/asm/test.h
+++ b/arch/sandbox/include/asm/test.h
@@ -14,6 +14,7 @@
#define SANDBOX_PCI_VENDOR_ID 0x1234
#define SANDBOX_PCI_SWAP_CASE_EMUL_ID 0x5678
#define SANDBOX_PCI_PMC_EMUL_ID 0x5677
+#define SANDBOX_PCI_P2SB_EMUL_ID 0x5676
#define SANDBOX_PCI_CLASS_CODE PCI_CLASS_CODE_COMM
#define SANDBOX_PCI_CLASS_SUB_CODE PCI_CLASS_SUB_CODE_COMM_SERIAL
diff --git a/configs/sandbox64_defconfig b/configs/sandbox64_defconfig
index 716096abc5..229e268972 100644
--- a/configs/sandbox64_defconfig
+++ b/configs/sandbox64_defconfig
@@ -83,6 +83,8 @@ CONFIG_DEVRES=y
CONFIG_DEBUG_DEVRES=y
CONFIG_ADC=y
CONFIG_ADC_SANDBOX=y
+CONFIG_AXI=y
+CONFIG_AXI_SANDBOX=y
CONFIG_CLK=y
CONFIG_CPU=y
CONFIG_DM_DEMO=y
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 5a3c4f151d..f3d5c2319a 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -132,6 +132,8 @@ CONFIG_CROS_EC_I2C=y
CONFIG_CROS_EC_LPC=y
CONFIG_CROS_EC_SANDBOX=y
CONFIG_CROS_EC_SPI=y
+CONFIG_IRQ=y
+CONFIG_P2SB=y
CONFIG_PWRSEQ=y
CONFIG_SPL_PWRSEQ=y
CONFIG_I2C_EEPROM=y
@@ -151,7 +153,6 @@ CONFIG_PCI=y
CONFIG_DM_PCI=y
CONFIG_DM_PCI_COMPAT=y
CONFIG_PCI_SANDBOX=y
-CONFIG_P2SB=y
CONFIG_PHY=y
CONFIG_PHY_SANDBOX=y
CONFIG_PINCTRL=y
diff --git a/configs/sandbox_flattree_defconfig b/configs/sandbox_flattree_defconfig
index 774c278bce..ab4d26d012 100644
--- a/configs/sandbox_flattree_defconfig
+++ b/configs/sandbox_flattree_defconfig
@@ -67,6 +67,8 @@ CONFIG_DEVRES=y
CONFIG_DEBUG_DEVRES=y
CONFIG_ADC=y
CONFIG_ADC_SANDBOX=y
+CONFIG_AXI=y
+CONFIG_AXI_SANDBOX=y
CONFIG_CLK=y
CONFIG_CLK_COMPOSITE_CCF=y
CONFIG_SANDBOX_CLK_CCF=y
@@ -117,6 +119,7 @@ CONFIG_PCI=y
CONFIG_DM_PCI=y
CONFIG_DM_PCI_COMPAT=y
CONFIG_PCI_SANDBOX=y
+CONFIG_P2SB=y
CONFIG_PHY=y
CONFIG_PHY_SANDBOX=y
CONFIG_PINCTRL=y
diff --git a/configs/sandbox_spl_defconfig b/configs/sandbox_spl_defconfig
index 478e4bd9d4..0dea858eda 100644
--- a/configs/sandbox_spl_defconfig
+++ b/configs/sandbox_spl_defconfig
@@ -88,6 +88,8 @@ CONFIG_DEBUG_DEVRES=y
# CONFIG_SPL_SIMPLE_BUS is not set
CONFIG_ADC=y
CONFIG_ADC_SANDBOX=y
+CONFIG_AXI=y
+CONFIG_AXI_SANDBOX=y
CONFIG_CLK=y
CONFIG_CPU=y
CONFIG_DM_DEMO=y
diff --git a/configs/tools-only_defconfig b/configs/tools-only_defconfig
index e36c9debf6..c698be67ea 100644
--- a/configs/tools-only_defconfig
+++ b/configs/tools-only_defconfig
@@ -13,6 +13,8 @@ CONFIG_DEFAULT_DEVICE_TREE="sandbox"
CONFIG_SYS_RELOC_GD_ENV_ADDR=y
CONFIG_IP_DEFRAG=y
# CONFIG_UDP_FUNCTION_FASTBOOT is not set
+CONFIG_AXI=y
+CONFIG_AXI_SANDBOX=y
CONFIG_SANDBOX_GPIO=y
CONFIG_PCI=y
CONFIG_DM_PCI=y
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 78b598b367..44c9e3ef08 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -10,8 +10,10 @@ obj-$(CONFIG_$(SPL_TPL_)CROS_EC_SANDBOX) += cros_ec_sandbox.o
obj-$(CONFIG_$(SPL_TPL_)CROS_EC_LPC) += cros_ec_lpc.o
ifndef CONFIG_SPL_BUILD
+obj-$(CONFIG_SANDBOX) += sandbox_adder.o
obj-$(CONFIG_CROS_EC_I2C) += cros_ec_i2c.o
obj-$(CONFIG_CROS_EC_SPI) += cros_ec_spi.o
+obj-$(CONFIG_SANDBOX) += p2sb_sandbox.o p2sb_emul.o
obj-$(CONFIG_SANDBOX) += swap_case.o
endif
diff --git a/drivers/misc/p2sb_emul.c b/drivers/misc/p2sb_emul.c
new file mode 100644
index 0000000000..c3795c59c0
--- /dev/null
+++ b/drivers/misc/p2sb_emul.c
@@ -0,0 +1,272 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * PCI emulation device for an x86 Primary-to-Sideband bus
+ *
+ * Copyright 2019 Google LLC
+ * Written by Simon Glass <sjg at chromium.org>
+ */
+
+#define LOG_CATEGORY UCLASS_MISC
+#define LOG_DEBUG
+
+#include <common.h>
+#include <axi.h>
+#include <dm.h>
+#include <pci.h>
+#include <asm/test.h>
+#include <p2sb.h>
+
+/**
+ * struct p2sb_emul_platdata - platform data for this device
+ *
+ * @command: Current PCI command value
+ * @bar: Current base address values
+ */
+struct p2sb_emul_platdata {
+ u16 command;
+ u32 bar[6];
+};
+
+enum {
+ /* This emulator supports 16 different devices */
+ MEMMAP_SIZE = 16 << PCR_PORTID_SHIFT,
+};
+
+static struct pci_bar {
+ int type;
+ u32 size;
+} barinfo[] = {
+ { PCI_BASE_ADDRESS_MEM_TYPE_32, MEMMAP_SIZE },
+ { 0, 0 },
+ { 0, 0 },
+ { 0, 0 },
+ { 0, 0 },
+ { 0, 0 },
+};
+
+struct p2sb_emul_priv {
+ u8 regs[16];
+};
+
+static int sandbox_p2sb_emul_read_config(struct udevice *emul, uint offset,
+ ulong *valuep, enum pci_size_t size)
+{
+ struct p2sb_emul_platdata *plat = dev_get_platdata(emul);
+
+ switch (offset) {
+ case PCI_COMMAND:
+ *valuep = plat->command;
+ break;
+ case PCI_HEADER_TYPE:
+ *valuep = PCI_HEADER_TYPE_NORMAL;
+ break;
+ case PCI_VENDOR_ID:
+ *valuep = SANDBOX_PCI_VENDOR_ID;
+ break;
+ case PCI_DEVICE_ID:
+ *valuep = SANDBOX_PCI_P2SB_EMUL_ID;
+ break;
+ case PCI_CLASS_DEVICE:
+ if (size == PCI_SIZE_8) {
+ *valuep = SANDBOX_PCI_CLASS_SUB_CODE;
+ } else {
+ *valuep = (SANDBOX_PCI_CLASS_CODE << 8) |
+ SANDBOX_PCI_CLASS_SUB_CODE;
+ }
+ break;
+ case PCI_CLASS_CODE:
+ *valuep = SANDBOX_PCI_CLASS_CODE;
+ break;
+ case PCI_BASE_ADDRESS_0:
+ case PCI_BASE_ADDRESS_1:
+ case PCI_BASE_ADDRESS_2:
+ case PCI_BASE_ADDRESS_3:
+ case PCI_BASE_ADDRESS_4:
+ case PCI_BASE_ADDRESS_5: {
+ int barnum;
+ u32 *bar;
+
+ barnum = pci_offset_to_barnum(offset);
+ bar = &plat->bar[barnum];
+
+ *valuep = sandbox_pci_read_bar(*bar, barinfo[barnum].type,
+ barinfo[barnum].size);
+ break;
+ }
+ case PCI_CAPABILITY_LIST:
+ *valuep = PCI_CAP_ID_PM_OFFSET;
+ break;
+ }
+
+ return 0;
+}
+
+static int sandbox_p2sb_emul_write_config(struct udevice *emul, uint offset,
+ ulong value, enum pci_size_t size)
+{
+ struct p2sb_emul_platdata *plat = dev_get_platdata(emul);
+
+ switch (offset) {
+ case PCI_COMMAND:
+ plat->command = value;
+ break;
+ case PCI_BASE_ADDRESS_0:
+ case PCI_BASE_ADDRESS_1: {
+ int barnum;
+ u32 *bar;
+
+ barnum = pci_offset_to_barnum(offset);
+ bar = &plat->bar[barnum];
+
+ log_debug("w bar %d=%lx\n", barnum, value);
+ *bar = value;
+ /* space indicator (bit#0) is read-only */
+ *bar |= barinfo[barnum].type;
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int sandbox_p2sb_emul_find_bar(struct udevice *emul, unsigned int addr,
+ int *barnump, unsigned int *offsetp)
+{
+ struct p2sb_emul_platdata *plat = dev_get_platdata(emul);
+ int barnum;
+
+ for (barnum = 0; barnum < ARRAY_SIZE(barinfo); barnum++) {
+ unsigned int size = barinfo[barnum].size;
+ u32 base = plat->bar[barnum] & ~PCI_BASE_ADDRESS_SPACE;
+
+ if (addr >= base && addr < base + size) {
+ *barnump = barnum;
+ *offsetp = addr - base;
+ return 0;
+ }
+ }
+ *barnump = -1;
+
+ return -ENOENT;
+}
+
+static int sandbox_p2sb_emul_read_io(struct udevice *dev, unsigned int addr,
+ ulong *valuep, enum pci_size_t size)
+{
+ unsigned int offset;
+ int barnum;
+ int ret;
+
+ ret = sandbox_p2sb_emul_find_bar(dev, addr, &barnum, &offset);
+ if (ret)
+ return ret;
+
+ if (barnum == 4)
+ *valuep = offset;
+ else if (barnum == 0)
+ *valuep = offset;
+
+ return 0;
+}
+
+static int sandbox_p2sb_emul_write_io(struct udevice *dev, unsigned int addr,
+ ulong value, enum pci_size_t size)
+{
+ unsigned int offset;
+ int barnum;
+ int ret;
+
+ ret = sandbox_p2sb_emul_find_bar(dev, addr, &barnum, &offset);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int find_p2sb_channel(struct udevice *emul, uint offset,
+ struct udevice **devp)
+{
+ uint pid = offset >> PCR_PORTID_SHIFT;
+ struct udevice *p2sb, *dev;
+ int ret;
+
+ ret = sandbox_pci_get_client(emul, &p2sb);
+ if (ret)
+ return log_msg_ret("No client", ret);
+
+ device_foreach_child(dev, p2sb) {
+ struct p2sb_child_platdata *pplat =
+ dev_get_parent_platdata(dev);
+
+ log_debug(" - child %s, pid %d, want %d\n", dev->name,
+ pplat->pid, pid);
+ if (pid == pplat->pid) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENOENT;
+}
+
+static int sandbox_p2sb_emul_map_physmem(struct udevice *dev,
+ phys_addr_t addr, unsigned long *lenp,
+ void **ptrp)
+{
+ struct p2sb_emul_priv *priv = dev_get_priv(dev);
+ struct udevice *child;
+ unsigned int offset;
+ int barnum;
+ int ret;
+
+ log_debug("map %x: ", (uint)addr);
+ ret = sandbox_p2sb_emul_find_bar(dev, addr, &barnum, &offset);
+ if (ret)
+ return log_msg_ret("Cannot find bar", ret);
+ log_debug("bar %d, offset %x\n", barnum, offset);
+
+ if (barnum != 0)
+ return log_msg_ret("Unknown BAR", -EINVAL);
+
+ ret = find_p2sb_channel(dev, offset, &child);
+ if (ret)
+ return log_msg_ret("Cannot find channel", ret);
+
+ offset &= ((1 << PCR_PORTID_SHIFT) - 1);
+ ret = axi_read(child, offset, priv->regs, AXI_SIZE_32);
+ if (ret)
+ return log_msg_ret("Child read failed", ret);
+ *ptrp = priv->regs + (offset & 3);
+ *lenp = 4;
+
+ return 0;
+}
+
+static struct dm_pci_emul_ops sandbox_p2sb_emul_emul_ops = {
+ .read_config = sandbox_p2sb_emul_read_config,
+ .write_config = sandbox_p2sb_emul_write_config,
+ .read_io = sandbox_p2sb_emul_read_io,
+ .write_io = sandbox_p2sb_emul_write_io,
+ .map_physmem = sandbox_p2sb_emul_map_physmem,
+};
+
+static const struct udevice_id sandbox_p2sb_emul_ids[] = {
+ { .compatible = "sandbox,p2sb-emul" },
+ { }
+};
+
+U_BOOT_DRIVER(sandbox_p2sb_emul_emul) = {
+ .name = "sandbox_p2sb_emul_emul",
+ .id = UCLASS_PCI_EMUL,
+ .of_match = sandbox_p2sb_emul_ids,
+ .ops = &sandbox_p2sb_emul_emul_ops,
+ .priv_auto_alloc_size = sizeof(struct p2sb_emul_priv),
+ .platdata_auto_alloc_size = sizeof(struct p2sb_emul_platdata),
+};
+
+static struct pci_device_id sandbox_p2sb_emul_supported[] = {
+ { PCI_VDEVICE(SANDBOX, SANDBOX_PCI_PMC_EMUL_ID) },
+ {},
+};
+
+U_BOOT_PCI_DEVICE(sandbox_p2sb_emul_emul, sandbox_p2sb_emul_supported);
diff --git a/drivers/misc/p2sb_sandbox.c b/drivers/misc/p2sb_sandbox.c
new file mode 100644
index 0000000000..fb4dd786ab
--- /dev/null
+++ b/drivers/misc/p2sb_sandbox.c
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Sandbox P2SB for testing
+ *
+ * Copyright 2019 Google LLC
+ */
+
+#define LOG_CATEGORY UCLASS_P2SB
+
+#include <common.h>
+#include <dm.h>
+#include <asm/io.h>
+#include <p2sb.h>
+
+struct sandbox_p2sb_priv {
+ ulong base;
+};
+
+static int sandbox_p2sb_probe(struct udevice *dev)
+{
+ struct p2sb_uc_priv *upriv = dev_get_uclass_priv(dev);
+
+ upriv->mmio_base = dm_pci_read_bar32(dev, 0);
+ printf("mmio base %x\n", upriv->mmio_base);
+
+ return 0;
+}
+
+static const struct udevice_id sandbox_p2sb_ids[] = {
+ { .compatible = "sandbox,p2sb" },
+ { }
+};
+
+U_BOOT_DRIVER(p2sb_sandbox) = {
+ .name = "p2sb_sandbox",
+ .id = UCLASS_P2SB,
+ .of_match = sandbox_p2sb_ids,
+ .probe = sandbox_p2sb_probe,
+ .priv_auto_alloc_size = sizeof(struct sandbox_p2sb_priv),
+};
diff --git a/drivers/misc/sandbox_adder.c b/drivers/misc/sandbox_adder.c
new file mode 100644
index 0000000000..df262e6255
--- /dev/null
+++ b/drivers/misc/sandbox_adder.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Sandbox adder for p2sb testing
+ *
+ * Copyright 2019 Google LLC
+ */
+
+#define LOG_CATEGORY UCLASS_MISC
+
+#include <common.h>
+#include <axi.h>
+#include <dm.h>
+#include <misc.h>
+#include <p2sb.h>
+#include <asm/io.h>
+
+struct sandbox_adder_priv {
+ ulong base;
+};
+
+int sandbox_adder_read(struct udevice *dev, ulong address, void *data,
+ enum axi_size_t size)
+{
+ struct p2sb_child_platdata *pplat = dev_get_parent_platdata(dev);
+ u32 *val = data;
+
+ *val = pplat->pid << 24 | address;
+
+ return 0;
+}
+
+int sandbox_adder_write(struct udevice *dev, ulong address, void *data,
+ enum axi_size_t size)
+{
+ return 0;
+}
+
+static int sandbox_adder_probe(struct udevice *dev)
+{
+ return 0;
+}
+
+static struct axi_ops sandbox_adder_ops = {
+ .read = sandbox_adder_read,
+ .write = sandbox_adder_write,
+};
+
+static const struct udevice_id sandbox_adder_ids[] = {
+ { .compatible = "sandbox,adder" },
+ { }
+};
+
+U_BOOT_DRIVER(adder_sandbox) = {
+ .name = "sandbox_adder",
+ .id = UCLASS_AXI,
+ .of_match = sandbox_adder_ids,
+ .probe = sandbox_adder_probe,
+ .ops = &sandbox_adder_ops,
+ .priv_auto_alloc_size = sizeof(struct sandbox_adder_priv),
+};
diff --git a/test/dm/Makefile b/test/dm/Makefile
index 10a19a00c9..129ccb3b49 100644
--- a/test/dm/Makefile
+++ b/test/dm/Makefile
@@ -32,6 +32,7 @@ obj-y += ofnode.o
obj-$(CONFIG_OSD) += osd.o
obj-$(CONFIG_DM_VIDEO) += panel.o
obj-$(CONFIG_DM_PCI) += pci.o
+obj-$(CONFIG_P2SB) += p2sb.o
obj-$(CONFIG_PCI_ENDPOINT) += pci_ep.o
obj-$(CONFIG_PCH) += pch.o
obj-$(CONFIG_PHY) += phy.o
diff --git a/test/dm/p2sb.c b/test/dm/p2sb.c
new file mode 100644
index 0000000000..ccb75cf375
--- /dev/null
+++ b/test/dm/p2sb.c
@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Test for Primary-to-Sideband bus (P2SB)
+ *
+ * Copyright 2019 Google LLC
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <p2sb.h>
+#include <asm/test.h>
+#include <dm/test.h>
+#include <test/ut.h>
+
+/* Base test of the PMC uclass */
+static int dm_test_p2sb_base(struct unit_test_state *uts)
+{
+ struct udevice *dev;
+
+ sandbox_set_enable_memio(true);
+ ut_assertok(uclass_get_device_by_name(UCLASS_AXI, "adder", &dev));
+ ut_asserteq(0x03000004, pcr_read32(dev, 4));
+ ut_asserteq(0x300, pcr_read16(dev, 6));
+ ut_asserteq(4, pcr_read8(dev, 4));
+
+ return 0;
+}
+DM_TEST(dm_test_p2sb_base, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
--
2.24.0.432.g9d3f5f5b63-goog
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