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/* SPDX-License-Identifier: GPL-2.0-only */
#include <device/mmio.h>
#include <device/pci_ops.h>
#include <cbmem.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <reg_script.h>
#include <soc/iomap.h>
#include <soc/iosf.h>
#include <soc/lpc.h>
#include <soc/nvs.h>
#include <soc/pattrs.h>
#include <soc/pci_devs.h>
#include <soc/pmc.h>
#include <soc/ramstage.h>
#include "chip.h"
/* The LPE audio devices needs 1MiB of memory reserved aligned to a 512MiB
* address. Just take 1MiB @ 512MiB. */
#define FIRMWARE_PHYS_BASE (512 << 20)
#define FIRMWARE_PHYS_LENGTH (1 << 20)
#define FIRMWARE_PCI_REG_BASE 0xa8
#define FIRMWARE_PCI_REG_LENGTH 0xac
#define FIRMWARE_REG_BASE_C0 0x144000
#define FIRMWARE_REG_LENGTH_C0 (FIRMWARE_REG_BASE_C0 + 4)
static void assign_device_nvs(struct device *dev, u32 *field, unsigned int index)
{
struct resource *res;
res = find_resource(dev, index);
if (res)
*field = res->base;
}
static void lpe_enable_acpi_mode(struct device *dev)
{
static const struct reg_script ops[] = {
/* Disable PCI interrupt, enable Memory and Bus Master */
REG_PCI_OR16(PCI_COMMAND,
PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | (1<<10)),
/* Enable ACPI mode */
REG_IOSF_OR(IOSF_PORT_0x58, LPE_PCICFGCTR1,
LPE_PCICFGCTR1_PCI_CFG_DIS |
LPE_PCICFGCTR1_ACPI_INT_EN),
REG_SCRIPT_END
};
global_nvs_t *gnvs;
/* Find ACPI NVS to update BARs */
gnvs = (global_nvs_t *)cbmem_find(CBMEM_ID_ACPI_GNVS);
if (!gnvs) {
printk(BIOS_ERR, "Unable to locate Global NVS\n");
return;
}
/* Save BAR0, BAR1, and firmware base to ACPI NVS */
assign_device_nvs(dev, &gnvs->dev.lpe_bar0, PCI_BASE_ADDRESS_0);
assign_device_nvs(dev, &gnvs->dev.lpe_bar1, PCI_BASE_ADDRESS_1);
assign_device_nvs(dev, &gnvs->dev.lpe_fw, FIRMWARE_PCI_REG_BASE);
/* Device is enabled in ACPI mode */
gnvs->dev.lpe_en = 1;
/* Put device in ACPI mode */
reg_script_run_on_dev(dev, ops);
}
static void setup_codec_clock(struct device *dev)
{
uint32_t reg;
u32 *clk_reg;
struct soc_intel_baytrail_config *config;
const char *freq_str;
config = config_of(dev);
switch (config->lpe_codec_clk_freq) {
case 19:
freq_str = "19.2";
reg = CLK_FREQ_19P2MHZ;
break;
case 25:
freq_str = "25";
reg = CLK_FREQ_25MHZ;
break;
default:
printk(BIOS_DEBUG, "LPE codec clock not required.\n");
return;
}
/* Default to always running. */
reg |= CLK_CTL_ON;
if (config->lpe_codec_clk_num < 0 || config->lpe_codec_clk_num > 5) {
printk(BIOS_DEBUG, "Invalid LPE codec clock number.\n");
return;
}
printk(BIOS_DEBUG, "LPE Audio codec clock set to %sMHz.\n", freq_str);
clk_reg = (u32 *)(PMC_BASE_ADDRESS + PLT_CLK_CTL_0);
clk_reg += config->lpe_codec_clk_num;
write32(clk_reg, (read32(clk_reg) & ~0x7) | reg);
}
static void lpe_stash_firmware_info(struct device *dev)
{
struct resource *res;
struct resource *mmio;
const struct pattrs *pattrs = pattrs_get();
res = find_resource(dev, FIRMWARE_PCI_REG_BASE);
if (res == NULL) {
printk(BIOS_DEBUG, "LPE Firmware memory not found.\n");
return;
}
/* Continue using old way of informing firmware address / size. */
pci_write_config32(dev, FIRMWARE_PCI_REG_BASE, res->base);
pci_write_config32(dev, FIRMWARE_PCI_REG_LENGTH, res->size);
/* C0 and later steppings use an offset in the MMIO space. */
if (pattrs->stepping >= STEP_C0) {
mmio = find_resource(dev, PCI_BASE_ADDRESS_0);
write32((u32 *)(uintptr_t)(mmio->base + FIRMWARE_REG_BASE_C0),
res->base);
write32((u32 *)(uintptr_t)(mmio->base + FIRMWARE_REG_LENGTH_C0),
res->size);
}
}
static void lpe_init(struct device *dev)
{
struct soc_intel_baytrail_config *config = config_of(dev);
lpe_stash_firmware_info(dev);
setup_codec_clock(dev);
if (config->lpe_acpi_mode)
lpe_enable_acpi_mode(dev);
}
static void lpe_read_resources(struct device *dev)
{
pci_dev_read_resources(dev);
reserved_ram_resource(dev, FIRMWARE_PCI_REG_BASE,
FIRMWARE_PHYS_BASE >> 10,
FIRMWARE_PHYS_LENGTH >> 10);
}
static const struct device_operations device_ops = {
.read_resources = lpe_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = lpe_init,
.ops_pci = &soc_pci_ops,
};
static const struct pci_driver southcluster __pci_driver = {
.ops = &device_ops,
.vendor = PCI_VENDOR_ID_INTEL,
.device = LPE_DEVID,
};
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