1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpi_device.h>
#include <acpi/acpigen.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include "chip.h"
#include <soc/acp.h>
#include <soc/acpi.h>
#include <soc/pci_devs.h>
#include <soc/southbridge.h>
#include <amdblocks/acpimmio.h>
#include <commonlib/helpers.h>
static void init(struct device *dev)
{
const struct soc_amd_picasso_config *cfg;
struct resource *res;
uintptr_t bar;
/* Set the proper I2S_PIN_CONFIG state */
cfg = config_of_soc();
res = dev->resource_list;
if (!res || !res->base) {
printk(BIOS_ERR, "Error, unable to configure pin in %s\n", __func__);
return;
}
bar = (uintptr_t)res->base;
write32((void *)(bar + ACP_I2S_PIN_CONFIG), cfg->acp_pin_cfg);
if (cfg->acp_pin_cfg == I2S_PINS_I2S_TDM)
sb_clk_output_48Mhz(); /* Internal connection to I2S */
}
static const char *acp_acpi_name(const struct device *dev)
{
return "ACPD";
}
#define AMD_I2S_ACPI_NAME "I2SM"
#define AMD_I2S_ACPI_HID "AMDI5682"
#define AMD_I2S_ACPI_DESC "I2S machine driver"
static void acp_fill_i2s_machine_dev(const struct device *dev)
{
const char *scope = acpi_device_path(dev);
const struct soc_amd_picasso_config *cfg = config_of_soc();
const struct acpi_gpio *dmic_select_gpio = &cfg->dmic_select_gpio;
struct acpi_dp *dsd;
if (dmic_select_gpio->pin_count == 0)
return;
acpigen_write_scope(scope); /* Scope */
acpigen_write_device(AMD_I2S_ACPI_NAME); /* Device */
acpigen_write_name_string("_HID", AMD_I2S_ACPI_HID);
acpigen_write_name_integer("_UID", 1);
acpigen_write_name_string("_DDN", AMD_I2S_ACPI_DESC);
acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON);
/* Resources */
acpigen_write_name("_CRS");
acpigen_write_resourcetemplate_header();
acpi_device_write_gpio(dmic_select_gpio);
acpigen_write_resourcetemplate_footer();
dsd = acpi_dp_new_table("_DSD");
/*
* This GPIO is used to select DMIC0 or DMIC1 by the kernel driver. It does not
* really have a polarity since low and high control the selection of DMIC and
* hence does not have an active polarity.
* Kernel driver does not use the polarity field and instead treats the GPIO
* selection as follows:
* Set low (0) = Select DMIC0
* Set high (1) = Select DMIC1
*/
acpi_dp_add_gpio(dsd, "dmic-gpios", acpi_device_path_join(dev, AMD_I2S_ACPI_NAME),
0, /* Index = 0 (There is a single GPIO entry in _CRS). */
0, /* Pin = 0 (There is a single pin in the GPIO resource). */
0); /* Active low = 0 (Kernel driver does not use active polarity). */
acpi_dp_write(dsd);
acpigen_pop_len(); /* Device */
acpigen_pop_len(); /* Scope */
}
static void acp_fill_ssdt(const struct device *dev)
{
acpi_device_write_pci_dev(dev);
acp_fill_i2s_machine_dev(dev);
}
static struct device_operations acp_ops = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = init,
.ops_pci = &pci_dev_ops_pci,
.acpi_name = acp_acpi_name,
.acpi_fill_ssdt = acp_fill_ssdt,
};
static const struct pci_driver acp_driver __pci_driver = {
.ops = &acp_ops,
.vendor = PCI_VENDOR_ID_AMD,
.device = PCI_DEVICE_ID_AMD_FAM17H_ACP,
};
|
