Add control of an external VSC7512 chip.
Currently the four copper phy ports are fully functional. Communication to
external phys is also functional, but the SGMII / QSGMII interfaces are
currently non-functional.
Signed-off-by: Colin Foster <colin.foster@xxxxxxxxxxxxxxxx>
---
v5
* Rebase to use NET_DSA_MSCC_FELIX_DSA_LIB
* Remove ocelot_ext_phylink_validate as part of the rebase
* Remove stats_layout reference as part of the rebase
* Remove OCELOT_RES_NAME_* macros
v4
* Add forward-compatibility for device trees that have ports 4-7
defined by saying they are OCELOT_PORT_MODE_NONE
* Utilize new "resource_names" instead of "*_io_res". Many thanks
to Vladimir for making this possible.
- Also remove ocelot_ext_regmap_init() function
* Remove dev_set_drvdata(dev, NULL) from remove() to match other
drivers
v3
* Remove additional entry in vsc7512_port_modes array
* Add MFD_OCELOT namespace import, which is needed for
vsc7512_*_io_res
v2
* Add MAINTAINERS update
* Remove phrase "by way of the ocelot-mfd interface" from the commit
message
* Move MFD resource addition to a separate patch
* Update Kconfig help
* Remove "ocelot_ext_reset()" - it is now shared with ocelot_lib
* Remove unnecessary includes
* Remove "_EXT" from OCELOT_EXT_PORT_MODE_SERDES
* Remove _ext from the compatible string
* Remove no-longer-necessary GCB register definitions
v1 from previous RFC:
* Remove unnecessary byteorder and kconfig header includes.
* Create OCELOT_EXT_PORT_MODE_SERDES macro to match vsc9959.
* Utilize readx_poll_timeout for SYS_RESET_CFG_MEM_INIT.
* *_io_res struct arrays have been moved to the MFD files.
* Changes to utilize phylink_generic_validate() have been squashed.
* dev_err_probe() is used in the probe function.
* Make ocelot_ext_switch_of_match static.
* Relocate ocelot_ext_ops structure to be next to vsc7512_info, to
match what was done in other felix drivers.
* Utilize dev_get_regmap() instead of the obsolete
ocelot_init_regmap_from_resource() routine.
---
MAINTAINERS | 1 +
drivers/net/dsa/ocelot/Kconfig | 20 ++++
drivers/net/dsa/ocelot/Makefile | 2 +
drivers/net/dsa/ocelot/ocelot_ext.c | 163 ++++++++++++++++++++++++++++
4 files changed, 186 insertions(+)
create mode 100644 drivers/net/dsa/ocelot/ocelot_ext.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 6e85524a7443..733e311ee9c6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15157,6 +15157,7 @@ M: Colin Foster <colin.foster@xxxxxxxxxxxxxxxx>
S: Supported
F: Documentation/devicetree/bindings/mfd/mscc,ocelot.yaml
F: drivers/mfd/ocelot*
+F: drivers/net/dsa/ocelot/ocelot_ext.c
F: include/linux/mfd/ocelot.h
OCXL (Open Coherent Accelerator Processor Interface OpenCAPI) DRIVER
diff --git a/drivers/net/dsa/ocelot/Kconfig b/drivers/net/dsa/ocelot/Kconfig
index 60f1f7ada465..640725524d0c 100644
--- a/drivers/net/dsa/ocelot/Kconfig
+++ b/drivers/net/dsa/ocelot/Kconfig
@@ -8,6 +8,26 @@ config NET_DSA_MSCC_FELIX_DSA_LIB
Its name comes from the first hardware chip to make use of it
(VSC9959), code named Felix.
+config NET_DSA_MSCC_OCELOT_EXT
+ tristate "Ocelot External Ethernet switch support"
+ depends on NET_DSA && SPI
+ depends on NET_VENDOR_MICROSEMI
+ select MDIO_MSCC_MIIM
+ select MFD_OCELOT_CORE
+ select MSCC_OCELOT_SWITCH_LIB
+ select NET_DSA_MSCC_FELIX_DSA_LIB
+ select NET_DSA_TAG_OCELOT_8021Q
+ select NET_DSA_TAG_OCELOT
+ help
+ This driver supports the VSC7511, VSC7512, VSC7513 and VSC7514 chips
+ when controlled through SPI.
+
+ The Ocelot switch family is a set of multi-port networking chips. All
+ of these chips have the ability to be controlled externally through
+ SPI or PCIe interfaces.
+
+ Say "Y" here to enable external control to these chips.
+
config NET_DSA_MSCC_FELIX
tristate "Ocelot / Felix Ethernet switch support"
depends on NET_DSA && PCI
diff --git a/drivers/net/dsa/ocelot/Makefile b/drivers/net/dsa/ocelot/Makefile
index fd7dde570d4e..ead868a293e3 100644
--- a/drivers/net/dsa/ocelot/Makefile
+++ b/drivers/net/dsa/ocelot/Makefile
@@ -1,8 +1,10 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_NET_DSA_MSCC_FELIX_DSA_LIB) += mscc_felix_dsa_lib.o
obj-$(CONFIG_NET_DSA_MSCC_FELIX) += mscc_felix.o
+obj-$(CONFIG_NET_DSA_MSCC_OCELOT_EXT) += mscc_ocelot_ext.o
obj-$(CONFIG_NET_DSA_MSCC_SEVILLE) += mscc_seville.o
mscc_felix_dsa_lib-objs := felix.o
mscc_felix-objs := felix_vsc9959.o
+mscc_ocelot_ext-objs := ocelot_ext.o
mscc_seville-objs := seville_vsc9953.o
diff --git a/drivers/net/dsa/ocelot/ocelot_ext.c b/drivers/net/dsa/ocelot/ocelot_ext.c
new file mode 100644
index 000000000000..14efa6387bd7
--- /dev/null
+++ b/drivers/net/dsa/ocelot/ocelot_ext.c
@@ -0,0 +1,163 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright 2021-2022 Innovative Advantage Inc.
+ */
+
+#include <linux/mfd/ocelot.h>
+#include <linux/phylink.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <soc/mscc/ocelot.h>
+#include <soc/mscc/vsc7514_regs.h>
+#include "felix.h"
+
+#define VSC7514_NUM_PORTS 11
+
+#define OCELOT_PORT_MODE_SERDES (OCELOT_PORT_MODE_SGMII | \
+ OCELOT_PORT_MODE_QSGMII)
+
+static const u32 vsc7512_port_modes[VSC7514_NUM_PORTS] = {
+ OCELOT_PORT_MODE_INTERNAL,
+ OCELOT_PORT_MODE_INTERNAL,
+ OCELOT_PORT_MODE_INTERNAL,
+ OCELOT_PORT_MODE_INTERNAL,
+ OCELOT_PORT_MODE_NONE,
+ OCELOT_PORT_MODE_NONE,
+ OCELOT_PORT_MODE_NONE,
+ OCELOT_PORT_MODE_NONE,
+ OCELOT_PORT_MODE_NONE,
+ OCELOT_PORT_MODE_NONE,
+ OCELOT_PORT_MODE_NONE,
+};
+
+static const struct ocelot_ops ocelot_ext_ops = {
+ .reset = ocelot_reset,
+ .wm_enc = ocelot_wm_enc,
+ .wm_dec = ocelot_wm_dec,
+ .wm_stat = ocelot_wm_stat,
+ .port_to_netdev = felix_port_to_netdev,
+ .netdev_to_port = felix_netdev_to_port,
+};
+
+static const char * const vsc7512_resource_names[TARGET_MAX] = {
+ [SYS] = "sys",
+ [REW] = "rew",
+ [S0] = "s0",
+ [S1] = "s1",
+ [S2] = "s2",
+ [QS] = "qs",
+ [QSYS] = "qsys",
+ [ANA] = "ana",
+};
+
+static const struct felix_info vsc7512_info = {
+ .resource_names = vsc7512_resource_names,
+ .regfields = vsc7514_regfields,
+ .map = vsc7514_regmap,
+ .ops = &ocelot_ext_ops,
+ .vcap = vsc7514_vcap_props,
+ .num_mact_rows = 1024,
+ .num_ports = VSC7514_NUM_PORTS,
+ .num_tx_queues = OCELOT_NUM_TC,
+ .port_modes = vsc7512_port_modes,
+};
+
+static int ocelot_ext_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct dsa_switch *ds;
+ struct ocelot *ocelot;
+ struct felix *felix;
+ int err;
+
+ felix = kzalloc(sizeof(*felix), GFP_KERNEL);
+ if (!felix)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, felix);
+
+ ocelot = &felix->ocelot;
+ ocelot->dev = dev;
+
+ ocelot->num_flooding_pgids = 1;
+
+ felix->info = &vsc7512_info;
+
+ ds = kzalloc(sizeof(*ds), GFP_KERNEL);
+ if (!ds) {
+ err = -ENOMEM;
+ dev_err_probe(dev, err, "Failed to allocate DSA switch\n");
+ goto err_free_felix;
+ }
+
+ ds->dev = dev;
+ ds->num_ports = felix->info->num_ports;
+ ds->num_tx_queues = felix->info->num_tx_queues;
+
+ ds->ops = &felix_switch_ops;
+ ds->priv = ocelot;
+ felix->ds = ds;
+ felix->tag_proto = DSA_TAG_PROTO_OCELOT;
+
+ err = dsa_register_switch(ds);
+ if (err) {
+ dev_err_probe(dev, err, "Failed to register DSA switch\n");
+ goto err_free_ds;
+ }
+
+ return 0;
+
+err_free_ds:
+ kfree(ds);
+err_free_felix:
+ kfree(felix);
+ return err;
+}
+
+static int ocelot_ext_remove(struct platform_device *pdev)
+{
+ struct felix *felix = dev_get_drvdata(&pdev->dev);
+
+ if (!felix)
+ return 0;
+
+ dsa_unregister_switch(felix->ds);
+
+ kfree(felix->ds);
+ kfree(felix);
+
+ return 0;
+}
+
+static void ocelot_ext_shutdown(struct platform_device *pdev)
+{
+ struct felix *felix = dev_get_drvdata(&pdev->dev);
+
+ if (!felix)
+ return;
+
+ dsa_switch_shutdown(felix->ds);
+
+ dev_set_drvdata(&pdev->dev, NULL);
+}
+
+static const struct of_device_id ocelot_ext_switch_of_match[] = {
+ { .compatible = "mscc,vsc7512-switch" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, ocelot_ext_switch_of_match);
+
+static struct platform_driver ocelot_ext_switch_driver = {
+ .driver = {
+ .name = "ocelot-switch",
+ .of_match_table = of_match_ptr(ocelot_ext_switch_of_match),
+ },
+ .probe = ocelot_ext_probe,
+ .remove = ocelot_ext_remove,
+ .shutdown = ocelot_ext_shutdown,
+};
+module_platform_driver(ocelot_ext_switch_driver);
+
+MODULE_DESCRIPTION("External Ocelot Switch driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(MFD_OCELOT);
--
2.25.1
