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path: root/drivers/net/dsa/vitesse-vsc73xx-platform.c
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Diffstat (limited to 'drivers/net/dsa/vitesse-vsc73xx-platform.c')
-rw-r--r--drivers/net/dsa/vitesse-vsc73xx-platform.c174
1 files changed, 174 insertions, 0 deletions
diff --git a/drivers/net/dsa/vitesse-vsc73xx-platform.c b/drivers/net/dsa/vitesse-vsc73xx-platform.c
new file mode 100644
index 0000000000..bd4206e8f9
--- /dev/null
+++ b/drivers/net/dsa/vitesse-vsc73xx-platform.c
@@ -0,0 +1,174 @@
+// SPDX-License-Identifier: GPL-2.0
+/* DSA driver for:
+ * Vitesse VSC7385 SparX-G5 5+1-port Integrated Gigabit Ethernet Switch
+ * Vitesse VSC7388 SparX-G8 8-port Integrated Gigabit Ethernet Switch
+ * Vitesse VSC7395 SparX-G5e 5+1-port Integrated Gigabit Ethernet Switch
+ * Vitesse VSC7398 SparX-G8e 8-port Integrated Gigabit Ethernet Switch
+ *
+ * This driver takes control of the switch chip connected over CPU-attached
+ * address bus and configures it to route packages around when connected to
+ * a CPU port.
+ *
+ * Copyright (C) 2019 Pawel Dembicki <paweldembicki@gmail.com>
+ * Based on vitesse-vsc-spi.c by:
+ * Copyright (C) 2018 Linus Wallej <linus.walleij@linaro.org>
+ * Includes portions of code from the firmware uploader by:
+ * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+#include "vitesse-vsc73xx.h"
+
+#define VSC73XX_CMD_PLATFORM_BLOCK_SHIFT 14
+#define VSC73XX_CMD_PLATFORM_BLOCK_MASK 0x7
+#define VSC73XX_CMD_PLATFORM_SUBBLOCK_SHIFT 10
+#define VSC73XX_CMD_PLATFORM_SUBBLOCK_MASK 0xf
+#define VSC73XX_CMD_PLATFORM_REGISTER_SHIFT 2
+
+/*
+ * struct vsc73xx_platform - VSC73xx Platform state container
+ */
+struct vsc73xx_platform {
+ struct platform_device *pdev;
+ void __iomem *base_addr;
+ struct vsc73xx vsc;
+};
+
+static const struct vsc73xx_ops vsc73xx_platform_ops;
+
+static u32 vsc73xx_make_addr(u8 block, u8 subblock, u8 reg)
+{
+ u32 ret;
+
+ ret = (block & VSC73XX_CMD_PLATFORM_BLOCK_MASK)
+ << VSC73XX_CMD_PLATFORM_BLOCK_SHIFT;
+ ret |= (subblock & VSC73XX_CMD_PLATFORM_SUBBLOCK_MASK)
+ << VSC73XX_CMD_PLATFORM_SUBBLOCK_SHIFT;
+ ret |= reg << VSC73XX_CMD_PLATFORM_REGISTER_SHIFT;
+
+ return ret;
+}
+
+static int vsc73xx_platform_read(struct vsc73xx *vsc, u8 block, u8 subblock,
+ u8 reg, u32 *val)
+{
+ struct vsc73xx_platform *vsc_platform = vsc->priv;
+ u32 offset;
+
+ if (!vsc73xx_is_addr_valid(block, subblock))
+ return -EINVAL;
+
+ offset = vsc73xx_make_addr(block, subblock, reg);
+ /* By default vsc73xx running in big-endian mode.
+ * (See "Register Addressing" section 5.5.3 in the VSC7385 manual.)
+ */
+ *val = ioread32be(vsc_platform->base_addr + offset);
+
+ return 0;
+}
+
+static int vsc73xx_platform_write(struct vsc73xx *vsc, u8 block, u8 subblock,
+ u8 reg, u32 val)
+{
+ struct vsc73xx_platform *vsc_platform = vsc->priv;
+ u32 offset;
+
+ if (!vsc73xx_is_addr_valid(block, subblock))
+ return -EINVAL;
+
+ offset = vsc73xx_make_addr(block, subblock, reg);
+ iowrite32be(val, vsc_platform->base_addr + offset);
+
+ return 0;
+}
+
+static int vsc73xx_platform_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct vsc73xx_platform *vsc_platform;
+ int ret;
+
+ vsc_platform = devm_kzalloc(dev, sizeof(*vsc_platform), GFP_KERNEL);
+ if (!vsc_platform)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, vsc_platform);
+ vsc_platform->pdev = pdev;
+ vsc_platform->vsc.dev = dev;
+ vsc_platform->vsc.priv = vsc_platform;
+ vsc_platform->vsc.ops = &vsc73xx_platform_ops;
+
+ /* obtain I/O memory space */
+ vsc_platform->base_addr = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(vsc_platform->base_addr)) {
+ dev_err(&pdev->dev, "cannot request I/O memory space\n");
+ ret = -ENXIO;
+ return ret;
+ }
+
+ return vsc73xx_probe(&vsc_platform->vsc);
+}
+
+static int vsc73xx_platform_remove(struct platform_device *pdev)
+{
+ struct vsc73xx_platform *vsc_platform = platform_get_drvdata(pdev);
+
+ if (!vsc_platform)
+ return 0;
+
+ vsc73xx_remove(&vsc_platform->vsc);
+
+ return 0;
+}
+
+static void vsc73xx_platform_shutdown(struct platform_device *pdev)
+{
+ struct vsc73xx_platform *vsc_platform = platform_get_drvdata(pdev);
+
+ if (!vsc_platform)
+ return;
+
+ vsc73xx_shutdown(&vsc_platform->vsc);
+
+ platform_set_drvdata(pdev, NULL);
+}
+
+static const struct vsc73xx_ops vsc73xx_platform_ops = {
+ .read = vsc73xx_platform_read,
+ .write = vsc73xx_platform_write,
+};
+
+static const struct of_device_id vsc73xx_of_match[] = {
+ {
+ .compatible = "vitesse,vsc7385",
+ },
+ {
+ .compatible = "vitesse,vsc7388",
+ },
+ {
+ .compatible = "vitesse,vsc7395",
+ },
+ {
+ .compatible = "vitesse,vsc7398",
+ },
+ { },
+};
+MODULE_DEVICE_TABLE(of, vsc73xx_of_match);
+
+static struct platform_driver vsc73xx_platform_driver = {
+ .probe = vsc73xx_platform_probe,
+ .remove = vsc73xx_platform_remove,
+ .shutdown = vsc73xx_platform_shutdown,
+ .driver = {
+ .name = "vsc73xx-platform",
+ .of_match_table = vsc73xx_of_match,
+ },
+};
+module_platform_driver(vsc73xx_platform_driver);
+
+MODULE_AUTHOR("Pawel Dembicki <paweldembicki@gmail.com>");
+MODULE_DESCRIPTION("Vitesse VSC7385/7388/7395/7398 Platform driver");
+MODULE_LICENSE("GPL v2");