1 // Copyright 2018 The Fuchsia Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include <ddk/debug.h>
6 #include <ddk/device.h>
7 #include <ddk/metadata.h>
8 #include <ddk/metadata/gpt.h>
9 #include <ddk/platform-defs.h>
10 #include <ddktl/mmio.h>
11 #include <hw/reg.h>
12 #include <lib/zx/handle.h>
13
14 #include <soc/aml-t931/t931-gpio.h>
15 #include <soc/aml-t931/t931-hw.h>
16 #include <soc/aml-common/aml-sd-emmc.h>
17
18 #include "sherlock.h"
19
20 namespace sherlock {
21
22 namespace {
23
24 constexpr pbus_mmio_t emmc_mmios[] = {
25 {
26 .base = T931_SD_EMMC_C_BASE,
27 .length = T931_SD_EMMC_C_LENGTH,
28 },
29 };
30
31 constexpr pbus_irq_t emmc_irqs[] = {
32 {
33 .irq = T931_SD_EMMC_C_IRQ,
34 .mode = ZX_INTERRUPT_MODE_EDGE_HIGH,
35 },
36 };
37
38 constexpr pbus_bti_t emmc_btis[] = {
39 {
40 .iommu_index = 0,
41 .bti_id = BTI_EMMC,
42 },
43 };
44
45 static const pbus_gpio_t emmc_gpios[] = {
46 {
47 .gpio = T931_EMMC_RST,
48 },
49 };
50
51 static aml_sd_emmc_config_t config = {
52 .supports_dma = true,
53 //As per AMlogic, on S912 chipset, HS400 mode can be operated at 125MHZ or low.
54 .min_freq = 400000,
55 .max_freq = 120000000,
56 };
57
58 static const guid_map_t guid_map[] = {
59 { "boot", GUID_ZIRCON_A_VALUE },
60 { "recovery", GUID_ZIRCON_R_VALUE },
61 { "cache", GUID_FVM_VALUE }
62 };
63 static_assert(sizeof(guid_map) / sizeof(guid_map[0]) <= DEVICE_METADATA_GUID_MAP_MAX_ENTRIES);
64
65 static const pbus_metadata_t emmc_metadata[] = {
66 {
67 .type = DEVICE_METADATA_PRIVATE,
68 .data_buffer = &config,
69 .data_size = sizeof(config),
70 },
71 {
72 .type = DEVICE_METADATA_GUID_MAP,
73 .data_buffer = guid_map,
74 .data_size = sizeof(guid_map),
75 }
76 };
77
78 static const pbus_boot_metadata_t emmc_boot_metadata[] = {
79 {
80 .zbi_type = DEVICE_METADATA_PARTITION_MAP,
81 .zbi_extra = 0,
82 },
83 };
84
__anon8f8555e90202()85 static pbus_dev_t emmc_dev = [](){
86 pbus_dev_t dev;
87 dev.name = "sherlock-emmc";
88 dev.vid = PDEV_VID_AMLOGIC;
89 dev.pid = PDEV_PID_GENERIC;
90 dev.did = PDEV_DID_AMLOGIC_SD_EMMC;
91 dev.mmio_list = emmc_mmios;
92 dev.mmio_count = countof(emmc_mmios);
93 dev.irq_list = emmc_irqs;
94 dev.irq_count = countof(emmc_irqs);
95 dev.bti_list = emmc_btis;
96 dev.bti_count = countof(emmc_btis);
97 dev.gpio_list = emmc_gpios;
98 dev.gpio_count = countof(emmc_gpios);
99 dev.metadata_list = emmc_metadata;
100 dev.metadata_count = countof(emmc_metadata);
101 dev.boot_metadata_list = emmc_boot_metadata;
102 dev.boot_metadata_count = countof(emmc_boot_metadata);
103 return dev;
104 }();
105
106 } // namespace
107
EmmcInit()108 zx_status_t Sherlock::EmmcInit() {
109 // set alternate functions to enable EMMC
110 gpio_impl_.SetAltFunction(T931_EMMC_D0, T931_EMMC_D0_FN);
111 gpio_impl_.SetAltFunction(T931_EMMC_D1, T931_EMMC_D1_FN);
112 gpio_impl_.SetAltFunction(T931_EMMC_D2, T931_EMMC_D2_FN);
113 gpio_impl_.SetAltFunction(T931_EMMC_D3, T931_EMMC_D3_FN);
114 gpio_impl_.SetAltFunction(T931_EMMC_D4, T931_EMMC_D4_FN);
115 gpio_impl_.SetAltFunction(T931_EMMC_D5, T931_EMMC_D5_FN);
116 gpio_impl_.SetAltFunction(T931_EMMC_D6, T931_EMMC_D6_FN);
117 gpio_impl_.SetAltFunction(T931_EMMC_D7, T931_EMMC_D7_FN);
118 gpio_impl_.SetAltFunction(T931_EMMC_CLK, T931_EMMC_CLK_FN);
119 gpio_impl_.SetAltFunction(T931_EMMC_RST, T931_EMMC_RST_FN);
120 gpio_impl_.SetAltFunction(T931_EMMC_CMD, T931_EMMC_CMD_FN);
121 gpio_impl_.SetAltFunction(T931_EMMC_DS, T931_EMMC_DS_FN);
122
123 auto status = pbus_.DeviceAdd(&emmc_dev);
124 if (status != ZX_OK) {
125 zxlogf(ERROR, "%s: DeviceAdd failed %d\n", __func__, status);
126 return status;
127 }
128
129 return ZX_OK;
130 }
131
132 } // namespace sherlock
133