phytium: Add support for the Phytium MMC

This patch adds the Phytium Multimedia Card driver.

Signed-off-by: xu yan <[email protected]>
Signed-off-by: Cheng Quan <[email protected]>
Signed-off-by: Lai Xueyu <[email protected]>
Signed-off-by: Chen Baozi <[email protected]>
Signed-off-by: Wang Yinfeng <[email protected]>

Documentation/devicetree/bindings/mmc/phytium,mci.yaml

@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/phytium,mci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Phytium Multimedia Card Interface controller
+
+description: |
+  The highspeed MMC host controller on Phytium SoCs provides an interface
+  for MMC, SD and SDIO types of memory cards.
+
+maintainers:
+  - Chen Baozi <[email protected]>
+
+allOf:
+  - $ref: "mmc-controller.yaml"
+
+properties:
+  compatible:
+    const: phytium,mci
+
+  reg:
+    maxItems: 1
+    description: mmc controller base registers.
+
+  interrupts:
+    maxItems: 1
+    description: mmc controller interrupt.
+
+  clocks:
+    maxItems: 1
+    description: phandles to input clocks.
+
+  clock-names:
+    items:
+      - const: phytium_mci_clk
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+examples:
+  - |
+    mmc0: mmc@28000000 {
+      compatible = "phytium,mci";
+      reg = <0x0 0x28000000 0x0 0x1000>;
+      interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&sysclk_1200mhz>;
+      clock-names = "phytium_mci_clk";
+      status = "disabled";
+    };
+
+    &mmc0 {
+      bus-width = <4>;
+      max-frequency = <50000000>;
+      cap-sdio-irq;
+      cap-sd-highspeed;
+      sd-uhs-sdr12;
+      sd-uhs-sdr25;
+      sd-uhs-sdr50;
+      no-mmc;
+      status = "ok";
+    };

Documentation/devicetree/bindings/mmc/phytium,sdci.yaml

@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mmc/phytium,sdci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Phytium SDCI Controller Binding
+
+maintainers:
+  - Chen Baozi <[email protected]>
+
+allOf:
+  - $ref: mmc-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - phytium,sdci
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    minItems: 3
+    maxItems: 3
+
+  clocks:
+    minItems: 1
+    items:
+      - description: core clock
+
+  clock-names:
+    minItems: 1
+    items:
+      - const: phytium_sdc_clk
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    sdci: sdci@28207c00 {
+      compatible = "phytium,sdci";
+      reg = <0x0 0x28207c00 0x0 0x100>;
+      interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&sysclk_600mhz>;
+      clock-names = "phytium_sdc_clk";
+    };
+
+...

drivers/mmc/host/Kconfig

@@ -1079,3 +1079,38 @@ config MMC_LITEX
 	  module will be called litex_mmc.
 
 	  If unsure, say N.
+
+config MMC_PHYTIUM_SDCI
+        tristate "Phytium SD Host Controller support"
+        depends on ARM64
+        help
+          This selects support for the Phytium SD Host Controller on Phytium
+          Px210 chipset.
+
+          If you have a controller with this interface, say Y or M here.
+
+          If unsure, say N.
+
+config MMC_PHYTIUM_MCI_PCI
+        tristate "Phytium PCI MultiMedia Card Interface support"
+        depends on ARCH_PHYTIUM
+        default y if ARCH_PHYTIUM
+        help
+          This selects support for the PCI MultiMedia Card Interface on Phytium
+          Px210 chipset.
+
+	  If you have a controller with this interface, say Y or M here.
+
+          If unsure, say N.
+
+config MMC_PHYTIUM_MCI_PLTFM
+        tristate "Phytium MultiMedia Card Interface support"
+        depends on ARCH_PHYTIUM && OF
+        default y if ARCH_PHYTIUM
+        help
+          This selects support for  the MultiMedia Card Interface on Phytium
+          Px210 chipset.
+
+          If you have a controller with this interface, say Y or M here.
+
+          If unsure, say N.

drivers/mmc/host/Makefile

@@ -70,6 +70,9 @@ obj-$(CONFIG_MMC_USDHI6ROL0)	+= usdhi6rol0.o
 obj-$(CONFIG_MMC_TOSHIBA_PCI)	+= toshsd.o
 obj-$(CONFIG_MMC_BCM2835)	+= bcm2835.o
 obj-$(CONFIG_MMC_OWL)		+= owl-mmc.o
+obj-$(CONFIG_MMC_PHYTIUM_SDCI)  += phytium-sdci.o
+obj-$(CONFIG_MMC_PHYTIUM_MCI_PCI)       += phytium-mci-pci.o phytium-mci.o
+obj-$(CONFIG_MMC_PHYTIUM_MCI_PLTFM)     += phytium-mci-plat.o phytium-mci.o
 
 obj-$(CONFIG_MMC_REALTEK_PCI)	+= rtsx_pci_sdmmc.o
 obj-$(CONFIG_MMC_REALTEK_USB)	+= rtsx_usb_sdmmc.o

drivers/mmc/host/phytium-mci-pci.c

@@ -0,0 +1,175 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Phytium Multimedia Card Interface PCI driver
+ *
+ * Copyright (C) 2020-2023, Phytium Technology Co., Ltd.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/irq.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include "phytium-mci.h"
+
+static u32 sd_caps = MMC_CAP_SD_HIGHSPEED | MMC_CAP_WAIT_WHILE_BUSY |
+		     MMC_CAP_CMD23 | MMC_CAP_4_BIT_DATA;
+static u32 sd_caps2 = MMC_CAP2_NO_MMC;
+
+static u32 emmc_caps = MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA | MMC_CAP_WAIT_WHILE_BUSY |
+		       MMC_CAP_CMD23 | MMC_CAP_HW_RESET | MMC_CAP_MMC_HIGHSPEED |
+		       MMC_CAP_NONREMOVABLE;
+static u32 emmc_caps2 = MMC_CAP2_NO_SDIO | MMC_CAP2_NO_SD;
+
+#define PCI_BAR_NO 0
+
+#if defined CONFIG_PM && defined CONFIG_PM_SLEEP
+static const struct dev_pm_ops phytium_mci_dev_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(phytium_mci_suspend,
+				phytium_mci_resume)
+	SET_RUNTIME_PM_OPS(phytium_mci_runtime_suspend,
+			   phytium_mci_runtime_resume, NULL)
+};
+#else
+#define phytium_mci_dev_pm_ops NULL
+#endif
+
+static int
+phytium_mci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
+{
+	struct phytium_mci_host *host;
+	struct mmc_host *mmc;
+	int ret;
+
+	ret = pcim_enable_device(pdev);
+
+	if (ret)
+		return ret;
+	pci_set_master(pdev);
+
+	mmc = mmc_alloc_host(sizeof(struct phytium_mci_host), &pdev->dev);
+
+	if (!mmc)
+		return -ENOMEM;
+
+	host = mmc_priv(mmc);
+
+	pci_enable_msi(pdev);
+
+	host->irq = pdev->irq;
+	host->irq_flags = IRQF_SHARED;
+	host->dev = &pdev->dev;
+	ret = pcim_iomap_regions(pdev, 1 << PCI_BAR_NO, pci_name(pdev));
+
+	if (ret) {
+		dev_err(&pdev->dev, "I/O memory remapping failed\n");
+		goto host_free;
+	}
+
+	host->base = pcim_iomap_table(pdev)[PCI_BAR_NO];
+	host->is_use_dma = 1;
+	host->is_device_x100 = 1;
+
+	if (pdev->devfn == 2) {
+		host->caps = emmc_caps;
+		host->caps2 = emmc_caps2;
+	} else {
+		host->caps = sd_caps;
+		host->caps2 = sd_caps2;
+		mmc->f_max = 25000000; /* stable frequency */
+	}
+
+	host->mmc = mmc;
+	host->clk_rate = MCI_CLK;
+
+	dev_info(&pdev->dev, "%s %d: [bar %d] addr: 0x%llx size: 0x%llx km: 0x%llx devfn:%d\n",
+		 __func__, __LINE__, PCI_BAR_NO, pci_resource_start(pdev, 0),
+		 pci_resource_len(pdev, 0), (uint64_t)host->base, pdev->devfn);
+
+	dev_dbg(&pdev->dev, "%s %d:irq:0x%x\n", __func__, __LINE__, host->irq);
+
+	ret = phytium_mci_common_probe(host);
+
+	if (ret == MCI_REALEASE_MEM) {
+		ret = -ENOMEM;
+		goto release_mem;
+	} else if (ret) {
+		goto release;
+	}
+	pci_set_drvdata(pdev, mmc);
+	dev_info(&pdev->dev, "%s %d: probe phytium mci successful.\n", __func__, __LINE__);
+	return 0;
+
+release:
+	phytium_mci_deinit_hw(host);
+release_mem:
+
+	if (host->dma.adma_table) {
+		dma_free_coherent(&pdev->dev,
+					MAX_BD_NUM * sizeof(struct phytium_adma2_64_desc),
+					host->dma.adma_table, host->dma.adma_addr);
+	}
+host_free:
+	mmc_free_host(mmc);
+	pci_disable_device(pdev);
+	return ret;
+}
+
+static void phytium_mci_pci_remove(struct pci_dev *pdev)
+{
+	struct phytium_mci_host *host;
+	struct mmc_host *mmc;
+
+	mmc = pci_get_drvdata(pdev);
+	if (!mmc) {
+		dev_info(&pdev->dev, "%s %d: mmc is null.\n", __func__, __LINE__);
+		return;
+	}
+	host = mmc_priv(mmc);
+	if (!host) {
+		dev_info(&pdev->dev, "%s %d: host is null.\n", __func__, __LINE__);
+		mmc_remove_host(mmc);
+		mmc_free_host(mmc);
+		return;
+	}
+
+	del_timer(&host->hotplug_timer);
+
+	mmc_remove_host(host->mmc);
+
+	if (host->dma.adma_table) {
+		dma_free_coherent(&pdev->dev,
+				  MAX_BD_NUM * sizeof(struct phytium_adma2_64_desc),
+				  host->dma.adma_table, host->dma.adma_addr);
+	}
+	phytium_mci_deinit_hw(host);
+	mmc_free_host(mmc);
+	pci_set_drvdata(pdev, NULL);
+}
+
+static const struct pci_device_id phytium_mci_pci_tbl[] = {
+	{
+		PCI_DEVICE(PCI_VENDOR_ID_PHYTIUM, 0xdc28),
+		.class		= 0x5,
+		.class_mask	= 0,
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(pci, phytium_mci_pci_tbl);
+
+static struct pci_driver phytium_mci_pci_driver = {
+	.name		= "phytium-mci-pci",
+	.id_table	= phytium_mci_pci_tbl,
+	.probe		= phytium_mci_pci_probe,
+	.remove		= phytium_mci_pci_remove,
+	.driver	= {
+		.pm	= &phytium_mci_dev_pm_ops,
+	}
+};
+module_pci_driver(phytium_mci_pci_driver);
+
+MODULE_DESCRIPTION("Phytium Multimedia Card Interface PCI driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Cheng Quan <[email protected]>");