src/drivers/uart/oxpcie.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <device/device.h>
   4 #include <device/pci.h>
   5 #include <console/console.h>
   6 #include <console/uart.h>
   7 #include <device/mmio.h>
   8 #include <device/pci_ops.h>
   9
  10 static void oxford_oxpcie_enable(struct device *dev)
  11 {
  12         printk(BIOS_DEBUG, "Initializing Oxford OXPCIe952\n");
  13
  14         struct resource *res = probe_resource(dev, PCI_BASE_ADDRESS_0);
  15         if (!res) {
  16                 printk(BIOS_WARNING, "OXPCIe952: No UART resource found.\n");
  17                 return;
  18         }
  19         void *bar0 = res2mmio(res, 0, 0);
  20
  21         printk(BIOS_DEBUG, "OXPCIe952: Class=%x Revision ID=%x\n",
  22                         (read32(bar0) >> 8), (read32(bar0) & 0xff));
  23         printk(BIOS_DEBUG, "OXPCIe952: %d UARTs detected.\n",
  24                         (read32(bar0 + 4) & 3));
  25         printk(BIOS_DEBUG, "OXPCIe952: UART BAR: 0x%x\n", (u32)res->base);
  26 }
  27
  28 static void oxford_oxpcie_set_resources(struct device *dev)
  29 {
  30         pci_dev_set_resources(dev);
  31
  32         /* Re-initialize OXPCIe base address after set_resources */
  33         u32 mmio_base = pci_read_config32(dev, PCI_BASE_ADDRESS_0);
  34         oxford_remap(mmio_base & ~0xf);
  35 }
  36
  37 static struct device_operations oxford_oxpcie_ops = {
  38         .read_resources   = pci_dev_read_resources,
  39         .set_resources    = oxford_oxpcie_set_resources,
  40         .enable_resources = pci_dev_enable_resources,
  41         .init             = oxford_oxpcie_enable,
  42 };
  43
  44 static const struct pci_driver oxford_oxpcie_driver __pci_driver = {
  45         .ops    = &oxford_oxpcie_ops,
  46         .vendor = 0x1415,
  47         .device = 0xc158,
  48 };
  49
  50 static const struct pci_driver oxford_oxpcie_driver_2 __pci_driver = {
  51         .ops    = &oxford_oxpcie_ops,
  52         .vendor = 0x1415,
  53         .device = 0xc11b,
  54 };