123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137 |
- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (c) 2014 Google, Inc
- * Written by Simon Glass <sjg@chromium.org>
- */
- #include <common.h>
- #include <dm.h>
- #include <fdtdec.h>
- #include <log.h>
- #include <pci.h>
- #define FDT_DEV_INFO_CELLS 4
- #define FDT_DEV_INFO_SIZE (FDT_DEV_INFO_CELLS * sizeof(u32))
- #define SANDBOX_PCI_DEVFN(d, f) ((d << 3) | f)
- struct sandbox_pci_priv {
- struct {
- u16 vendor;
- u16 device;
- } vendev[256];
- };
- static int sandbox_pci_write_config(struct udevice *bus, pci_dev_t devfn,
- uint offset, ulong value,
- enum pci_size_t size)
- {
- struct dm_pci_emul_ops *ops;
- struct udevice *container, *emul;
- int ret;
- ret = sandbox_pci_get_emul(bus, devfn, &container, &emul);
- if (ret)
- return ret == -ENODEV ? 0 : ret;
- ops = pci_get_emul_ops(emul);
- if (!ops || !ops->write_config)
- return -ENOSYS;
- return ops->write_config(emul, offset, value, size);
- }
- static int sandbox_pci_read_config(const struct udevice *bus, pci_dev_t devfn,
- uint offset, ulong *valuep,
- enum pci_size_t size)
- {
- struct dm_pci_emul_ops *ops;
- struct udevice *container, *emul;
- struct sandbox_pci_priv *priv = dev_get_priv(bus);
- int ret;
- /* Prepare the default response */
- *valuep = pci_get_ff(size);
- ret = sandbox_pci_get_emul(bus, devfn, &container, &emul);
- if (ret) {
- if (!container) {
- u16 vendor, device;
- devfn = SANDBOX_PCI_DEVFN(PCI_DEV(devfn),
- PCI_FUNC(devfn));
- vendor = priv->vendev[devfn].vendor;
- device = priv->vendev[devfn].device;
- if (offset == PCI_VENDOR_ID && vendor)
- *valuep = vendor;
- else if (offset == PCI_DEVICE_ID && device)
- *valuep = device;
- return 0;
- } else {
- return ret == -ENODEV ? 0 : ret;
- }
- }
- ops = pci_get_emul_ops(emul);
- if (!ops || !ops->read_config)
- return -ENOSYS;
- return ops->read_config(emul, offset, valuep, size);
- }
- static int sandbox_pci_probe(struct udevice *dev)
- {
- struct sandbox_pci_priv *priv = dev_get_priv(dev);
- const fdt32_t *cell;
- u8 pdev, pfn, devfn;
- int len;
- cell = ofnode_get_property(dev_ofnode(dev), "sandbox,dev-info", &len);
- if (!cell)
- return 0;
- if ((len % FDT_DEV_INFO_SIZE) == 0) {
- int num = len / FDT_DEV_INFO_SIZE;
- int i;
- for (i = 0; i < num; i++) {
- debug("dev info #%d: %02x %02x %04x %04x\n", i,
- fdt32_to_cpu(cell[0]), fdt32_to_cpu(cell[1]),
- fdt32_to_cpu(cell[2]), fdt32_to_cpu(cell[3]));
- pdev = fdt32_to_cpu(cell[0]);
- pfn = fdt32_to_cpu(cell[1]);
- if (pdev > 31 || pfn > 7)
- continue;
- devfn = SANDBOX_PCI_DEVFN(pdev, pfn);
- priv->vendev[devfn].vendor = fdt32_to_cpu(cell[2]);
- priv->vendev[devfn].device = fdt32_to_cpu(cell[3]);
- cell += FDT_DEV_INFO_CELLS;
- }
- }
- return 0;
- }
- static const struct dm_pci_ops sandbox_pci_ops = {
- .read_config = sandbox_pci_read_config,
- .write_config = sandbox_pci_write_config,
- };
- static const struct udevice_id sandbox_pci_ids[] = {
- { .compatible = "sandbox,pci" },
- { }
- };
- U_BOOT_DRIVER(pci_sandbox) = {
- .name = "pci_sandbox",
- .id = UCLASS_PCI,
- .of_match = sandbox_pci_ids,
- .ops = &sandbox_pci_ops,
- .probe = sandbox_pci_probe,
- .priv_auto_alloc_size = sizeof(struct sandbox_pci_priv),
- /* Attach an emulator if we can */
- .child_post_bind = dm_scan_fdt_dev,
- .per_child_platdata_auto_alloc_size =
- sizeof(struct pci_child_platdata),
- };
|