src/soc/amd/picasso/acp.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <device/device.h>
   5 #include <device/pci.h>
   6 #include <device/pci_ids.h>
   7 #include <device/pci_ops.h>
   8 #include "chip.h"
   9 #include <soc/acp.h>
  10 #include <soc/acpi.h>
  11 #include <soc/pci_devs.h>
  12 #include <soc/southbridge.h>
  13 #include <amdblocks/acpimmio.h>
  14 #include <commonlib/helpers.h>
  15
  16 static void init(struct device *dev)
  17 {
  18         const struct soc_amd_picasso_config *cfg;
  19         const struct device *nb_dev = pcidev_path_on_root(GNB_DEVFN);
  20         struct resource *res;
  21         uintptr_t bar;
  22
  23         /* Set the proper I2S_PIN_CONFIG state */
  24         if (!nb_dev || !nb_dev->chip_info)
  25                 return;
  26
  27         cfg = nb_dev->chip_info;
  28
  29         res = dev->resource_list;
  30         if (!res || !res->base) {
  31                 printk(BIOS_ERR, "Error, unable to configure pin in %s\n", __func__);
  32                 return;
  33         }
  34
  35         bar = (uintptr_t)res->base;
  36         write32((void *)(bar + ACP_I2S_PIN_CONFIG), cfg->acp_pin_cfg);
  37
  38         if (cfg->acp_pin_cfg == I2S_PINS_I2S_TDM)
  39                 sb_clk_output_48Mhz(); /* Internal connection to I2S */
  40 }
  41
  42 static struct device_operations acp_ops = {
  43         .read_resources = pci_dev_read_resources,
  44         .set_resources = pci_dev_set_resources,
  45         .enable_resources = pci_dev_enable_resources,
  46         .init = init,
  47         .ops_pci = &pci_dev_ops_pci,
  48 };
  49
  50 static const struct pci_driver acp_driver __pci_driver = {
  51         .ops = &acp_ops,
  52         .vendor = PCI_VENDOR_ID_AMD,
  53         .device = PCI_DEVICE_ID_AMD_FAM17H_ACP,
  54 };