1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2015, Google, Inc
4 * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
5 */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <errno.h>
10 #include <log.h>
11 #include <malloc.h>
12 #include <mapmem.h>
13 #include <mmc.h>
14 #include <sdhci.h>
15 #include <acpi/acpigen.h>
16 #include <acpi/acpi_device.h>
17 #include <acpi/acpi_dp.h>
18 #include <asm-generic/gpio.h>
19 #include <dm/acpi.h>
20
21 /* Type of MMC device */
22 enum {
23 TYPE_SD,
24 TYPE_EMMC,
25 };
26
27 struct pci_mmc_plat {
28 struct mmc_config cfg;
29 struct mmc mmc;
30 };
31
32 struct pci_mmc_priv {
33 struct sdhci_host host;
34 void *base;
35 struct gpio_desc cd_gpio;
36 };
37
pci_mmc_probe(struct udevice * dev)38 static int pci_mmc_probe(struct udevice *dev)
39 {
40 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
41 struct pci_mmc_plat *plat = dev_get_plat(dev);
42 struct pci_mmc_priv *priv = dev_get_priv(dev);
43 struct sdhci_host *host = &priv->host;
44 struct blk_desc *desc;
45 int ret;
46
47 ret = mmc_of_parse(dev, &plat->cfg);
48 if (ret)
49 return ret;
50 desc = mmc_get_blk_desc(&plat->mmc);
51 desc->removable = !(plat->cfg.host_caps & MMC_CAP_NONREMOVABLE);
52
53 host->ioaddr = (void *)dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0,
54 PCI_REGION_MEM);
55 host->name = dev->name;
56 host->mmc = &plat->mmc;
57 host->mmc->dev = dev;
58 ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
59 if (ret)
60 return ret;
61 host->mmc->priv = &priv->host;
62 upriv->mmc = host->mmc;
63
64 return sdhci_probe(dev);
65 }
66
pci_mmc_of_to_plat(struct udevice * dev)67 static int pci_mmc_of_to_plat(struct udevice *dev)
68 {
69 if (CONFIG_IS_ENABLED(DM_GPIO)) {
70 struct pci_mmc_priv *priv = dev_get_priv(dev);
71
72 gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio, GPIOD_IS_IN);
73 }
74
75 return 0;
76 }
77
pci_mmc_bind(struct udevice * dev)78 static int pci_mmc_bind(struct udevice *dev)
79 {
80 struct pci_mmc_plat *plat = dev_get_plat(dev);
81
82 return sdhci_bind(dev, &plat->mmc, &plat->cfg);
83 }
84
pci_mmc_acpi_fill_ssdt(const struct udevice * dev,struct acpi_ctx * ctx)85 static int pci_mmc_acpi_fill_ssdt(const struct udevice *dev,
86 struct acpi_ctx *ctx)
87 {
88 struct pci_mmc_priv *priv = dev_get_priv(dev);
89 char path[ACPI_PATH_MAX];
90 struct acpi_gpio gpio;
91 struct acpi_dp *dp;
92 int ret;
93
94 if (!dev_has_ofnode(dev))
95 return 0;
96 if (dev_get_driver_data(dev) == TYPE_EMMC)
97 return 0;
98
99 ret = gpio_get_acpi(&priv->cd_gpio, &gpio);
100 if (ret)
101 return log_msg_ret("gpio", ret);
102 gpio.type = ACPI_GPIO_TYPE_INTERRUPT;
103 gpio.pull = ACPI_GPIO_PULL_NONE;
104 gpio.irq.mode = ACPI_IRQ_EDGE_TRIGGERED;
105 gpio.irq.polarity = ACPI_IRQ_ACTIVE_BOTH;
106 gpio.irq.shared = ACPI_IRQ_SHARED;
107 gpio.irq.wake = ACPI_IRQ_WAKE;
108 gpio.interrupt_debounce_timeout = 10000; /* 100ms */
109
110 /* Use device path as the Scope for the SSDT */
111 ret = acpi_device_path(dev, path, sizeof(path));
112 if (ret)
113 return log_msg_ret("path", ret);
114 acpigen_write_scope(ctx, path);
115 acpigen_write_name(ctx, "_CRS");
116
117 /* Write GpioInt() as default (if set) or custom from devicetree */
118 acpigen_write_resourcetemplate_header(ctx);
119 acpi_device_write_gpio(ctx, &gpio);
120 acpigen_write_resourcetemplate_footer(ctx);
121
122 /* Bind the cd-gpio name to the GpioInt() resource */
123 dp = acpi_dp_new_table("_DSD");
124 if (!dp)
125 return -ENOMEM;
126 acpi_dp_add_gpio(dp, "cd-gpio", path, 0, 0, 1);
127 ret = acpi_dp_write(ctx, dp);
128 if (ret)
129 return log_msg_ret("cd", ret);
130
131 acpigen_pop_len(ctx);
132
133 return 0;
134 }
135
136 struct acpi_ops pci_mmc_acpi_ops = {
137 .fill_ssdt = pci_mmc_acpi_fill_ssdt,
138 };
139
140 static const struct udevice_id pci_mmc_match[] = {
141 { .compatible = "intel,apl-sd", .data = TYPE_SD },
142 { .compatible = "intel,apl-emmc", .data = TYPE_EMMC },
143 { }
144 };
145
146 U_BOOT_DRIVER(pci_mmc) = {
147 .name = "pci_mmc",
148 .id = UCLASS_MMC,
149 .of_match = pci_mmc_match,
150 .bind = pci_mmc_bind,
151 .of_to_plat = pci_mmc_of_to_plat,
152 .probe = pci_mmc_probe,
153 .ops = &sdhci_ops,
154 .priv_auto = sizeof(struct pci_mmc_priv),
155 .plat_auto = sizeof(struct pci_mmc_plat),
156 ACPI_OPS_PTR(&pci_mmc_acpi_ops)
157 };
158
159 static struct pci_device_id mmc_supported[] = {
160 { PCI_DEVICE_CLASS(PCI_CLASS_SYSTEM_SDHCI << 8, 0xffff00) },
161 {},
162 };
163
164 U_BOOT_PCI_DEVICE(pci_mmc, mmc_supported);
165