--- /dev/null
+// 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@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);
--- /dev/null
+// 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),
+};
projects / oweals / u-boot.git / commitdiff