Merge tag 'dm-pull-28mar21' of git://git.denx.de/u-boot-dm into next
[platform/kernel/u-boot.git] / drivers / mmc / pci_mmc.c
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
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->cd_gpio = priv->cd_gpio;
57         host->mmc = &plat->mmc;
58         host->mmc->dev = dev;
59         ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
60         if (ret)
61                 return ret;
62         host->mmc->priv = &priv->host;
63         upriv->mmc = host->mmc;
64
65         return sdhci_probe(dev);
66 }
67
68 static int pci_mmc_of_to_plat(struct udevice *dev)
69 {
70         if (CONFIG_IS_ENABLED(DM_GPIO)) {
71                 struct pci_mmc_priv *priv = dev_get_priv(dev);
72                 int ret;
73
74                 ret = gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio,
75                                            GPIOD_IS_IN);
76                 log_debug("cd-gpio %s done, ret=%d\n", dev->name, ret);
77         }
78
79         return 0;
80 }
81
82 static int pci_mmc_bind(struct udevice *dev)
83 {
84         struct pci_mmc_plat *plat = dev_get_plat(dev);
85
86         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
87 }
88
89 static int pci_mmc_acpi_fill_ssdt(const struct udevice *dev,
90                                   struct acpi_ctx *ctx)
91 {
92         struct pci_mmc_priv *priv = dev_get_priv(dev);
93         char path[ACPI_PATH_MAX];
94         struct acpi_gpio gpio;
95         struct acpi_dp *dp;
96         int ret;
97
98         if (!dev_has_ofnode(dev))
99                 return 0;
100         if (dev_get_driver_data(dev) == TYPE_EMMC)
101                 return 0;
102
103         ret = gpio_get_acpi(&priv->cd_gpio, &gpio);
104         if (ret)
105                 return log_msg_ret("gpio", ret);
106         gpio.type = ACPI_GPIO_TYPE_INTERRUPT;
107         gpio.pull = ACPI_GPIO_PULL_NONE;
108         gpio.irq.mode = ACPI_IRQ_EDGE_TRIGGERED;
109         gpio.irq.polarity = ACPI_IRQ_ACTIVE_BOTH;
110         gpio.irq.shared = ACPI_IRQ_SHARED;
111         gpio.irq.wake = ACPI_IRQ_WAKE;
112         gpio.interrupt_debounce_timeout = 10000; /* 100ms */
113
114         /* Use device path as the Scope for the SSDT */
115         ret = acpi_device_path(dev, path, sizeof(path));
116         if (ret)
117                 return log_msg_ret("path", ret);
118         acpigen_write_scope(ctx, path);
119         acpigen_write_name(ctx, "_CRS");
120
121         /* Write GpioInt() as default (if set) or custom from devicetree */
122         acpigen_write_resourcetemplate_header(ctx);
123         acpi_device_write_gpio(ctx, &gpio);
124         acpigen_write_resourcetemplate_footer(ctx);
125
126         /* Bind the cd-gpio name to the GpioInt() resource */
127         dp = acpi_dp_new_table("_DSD");
128         if (!dp)
129                 return -ENOMEM;
130         acpi_dp_add_gpio(dp, "cd-gpio", path, 0, 0, 1);
131         ret = acpi_dp_write(ctx, dp);
132         if (ret)
133                 return log_msg_ret("cd", ret);
134
135         acpigen_pop_len(ctx);
136
137         return 0;
138 }
139
140 struct acpi_ops pci_mmc_acpi_ops = {
141         .fill_ssdt      = pci_mmc_acpi_fill_ssdt,
142 };
143
144 static const struct udevice_id pci_mmc_match[] = {
145         { .compatible = "intel,apl-sd", .data = TYPE_SD },
146         { .compatible = "intel,apl-emmc", .data = TYPE_EMMC },
147         { }
148 };
149
150 U_BOOT_DRIVER(pci_mmc) = {
151         .name   = "pci_mmc",
152         .id     = UCLASS_MMC,
153         .of_match = pci_mmc_match,
154         .bind   = pci_mmc_bind,
155         .of_to_plat     = pci_mmc_of_to_plat,
156         .probe  = pci_mmc_probe,
157         .ops    = &sdhci_ops,
158         .priv_auto      = sizeof(struct pci_mmc_priv),
159         .plat_auto      = sizeof(struct pci_mmc_plat),
160         ACPI_OPS_PTR(&pci_mmc_acpi_ops)
161 };
162
163 static struct pci_device_id mmc_supported[] = {
164         { PCI_DEVICE_CLASS(PCI_CLASS_SYSTEM_SDHCI << 8, 0xffff00) },
165         {},
166 };
167
168 U_BOOT_PCI_DEVICE(pci_mmc, mmc_supported);