diff options
Diffstat (limited to 'drivers/mfd/ocelot-core.c')
| -rw-r--r-- | drivers/mfd/ocelot-core.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/drivers/mfd/ocelot-core.c b/drivers/mfd/ocelot-core.c new file mode 100644 index 000000000..9cccf54fc --- /dev/null +++ b/drivers/mfd/ocelot-core.c @@ -0,0 +1,234 @@ +// SPDX-License-Identifier: (GPL-2.0 OR MIT) +/* + * Core driver for the Ocelot chip family. + * + * The VSC7511, 7512, 7513, and 7514 can be controlled internally via an + * on-chip MIPS processor, or externally via SPI, I2C, PCIe. This core driver is + * intended to be the bus-agnostic glue between, for example, the SPI bus and + * the child devices. + * + * Copyright 2021-2022 Innovative Advantage Inc. + * + * Author: Colin Foster <colin.foster@in-advantage.com> + */ + +#include <linux/bits.h> +#include <linux/device.h> +#include <linux/export.h> +#include <linux/iopoll.h> +#include <linux/ioport.h> +#include <linux/kernel.h> +#include <linux/mfd/core.h> +#include <linux/mfd/ocelot.h> +#include <linux/module.h> +#include <linux/regmap.h> +#include <linux/types.h> + +#include <soc/mscc/ocelot.h> + +#include "ocelot.h" + +#define REG_GCB_SOFT_RST 0x0008 + +#define BIT_SOFT_CHIP_RST BIT(0) + +#define VSC7512_MIIM0_RES_START 0x7107009c +#define VSC7512_MIIM1_RES_START 0x710700c0 +#define VSC7512_MIIM_RES_SIZE 0x00000024 + +#define VSC7512_PHY_RES_START 0x710700f0 +#define VSC7512_PHY_RES_SIZE 0x00000004 + +#define VSC7512_GPIO_RES_START 0x71070034 +#define VSC7512_GPIO_RES_SIZE 0x0000006c + +#define VSC7512_SIO_CTRL_RES_START 0x710700f8 +#define VSC7512_SIO_CTRL_RES_SIZE 0x00000100 + +#define VSC7512_HSIO_RES_START 0x710d0000 +#define VSC7512_HSIO_RES_SIZE 0x00000128 + +#define VSC7512_ANA_RES_START 0x71880000 +#define VSC7512_ANA_RES_SIZE 0x00010000 + +#define VSC7512_QS_RES_START 0x71080000 +#define VSC7512_QS_RES_SIZE 0x00000100 + +#define VSC7512_QSYS_RES_START 0x71800000 +#define VSC7512_QSYS_RES_SIZE 0x00200000 + +#define VSC7512_REW_RES_START 0x71030000 +#define VSC7512_REW_RES_SIZE 0x00010000 + +#define VSC7512_SYS_RES_START 0x71010000 +#define VSC7512_SYS_RES_SIZE 0x00010000 + +#define VSC7512_S0_RES_START 0x71040000 +#define VSC7512_S1_RES_START 0x71050000 +#define VSC7512_S2_RES_START 0x71060000 +#define VCAP_RES_SIZE 0x00000400 + +#define VSC7512_PORT_0_RES_START 0x711e0000 +#define VSC7512_PORT_1_RES_START 0x711f0000 +#define VSC7512_PORT_2_RES_START 0x71200000 +#define VSC7512_PORT_3_RES_START 0x71210000 +#define VSC7512_PORT_4_RES_START 0x71220000 +#define VSC7512_PORT_5_RES_START 0x71230000 +#define VSC7512_PORT_6_RES_START 0x71240000 +#define VSC7512_PORT_7_RES_START 0x71250000 +#define VSC7512_PORT_8_RES_START 0x71260000 +#define VSC7512_PORT_9_RES_START 0x71270000 +#define VSC7512_PORT_10_RES_START 0x71280000 +#define VSC7512_PORT_RES_SIZE 0x00010000 + +#define VSC7512_GCB_RST_SLEEP_US 100 +#define VSC7512_GCB_RST_TIMEOUT_US 100000 + +static int ocelot_gcb_chip_rst_status(struct ocelot_ddata *ddata) +{ + int val, err; + + err = regmap_read(ddata->gcb_regmap, REG_GCB_SOFT_RST, &val); + if (err) + return err; + + return val; +} + +int ocelot_chip_reset(struct device *dev) +{ + struct ocelot_ddata *ddata = dev_get_drvdata(dev); + int ret, val; + + /* + * Reset the entire chip here to put it into a completely known state. + * Other drivers may want to reset their own subsystems. The register + * self-clears, so one write is all that is needed and wait for it to + * clear. + */ + ret = regmap_write(ddata->gcb_regmap, REG_GCB_SOFT_RST, BIT_SOFT_CHIP_RST); + if (ret) + return ret; + + return readx_poll_timeout(ocelot_gcb_chip_rst_status, ddata, val, !val, + VSC7512_GCB_RST_SLEEP_US, VSC7512_GCB_RST_TIMEOUT_US); +} +EXPORT_SYMBOL_NS(ocelot_chip_reset, MFD_OCELOT); + +static const struct resource vsc7512_miim0_resources[] = { + DEFINE_RES_REG_NAMED(VSC7512_MIIM0_RES_START, VSC7512_MIIM_RES_SIZE, "gcb_miim0"), + DEFINE_RES_REG_NAMED(VSC7512_PHY_RES_START, VSC7512_PHY_RES_SIZE, "gcb_phy"), +}; + +static const struct resource vsc7512_miim1_resources[] = { + DEFINE_RES_REG_NAMED(VSC7512_MIIM1_RES_START, VSC7512_MIIM_RES_SIZE, "gcb_miim1"), +}; + +static const struct resource vsc7512_pinctrl_resources[] = { + DEFINE_RES_REG_NAMED(VSC7512_GPIO_RES_START, VSC7512_GPIO_RES_SIZE, "gcb_gpio"), +}; + +static const struct resource vsc7512_sgpio_resources[] = { + DEFINE_RES_REG_NAMED(VSC7512_SIO_CTRL_RES_START, VSC7512_SIO_CTRL_RES_SIZE, "gcb_sio"), +}; + +static const struct resource vsc7512_serdes_resources[] = { + DEFINE_RES_REG_NAMED(VSC7512_HSIO_RES_START, VSC7512_HSIO_RES_SIZE, "hsio"), +}; + +static const struct resource vsc7512_switch_resources[] = { + DEFINE_RES_REG_NAMED(VSC7512_ANA_RES_START, VSC7512_ANA_RES_SIZE, "ana"), + DEFINE_RES_REG_NAMED(VSC7512_HSIO_RES_START, VSC7512_HSIO_RES_SIZE, "hsio"), + DEFINE_RES_REG_NAMED(VSC7512_QS_RES_START, VSC7512_QS_RES_SIZE, "qs"), + DEFINE_RES_REG_NAMED(VSC7512_QSYS_RES_START, VSC7512_QSYS_RES_SIZE, "qsys"), + DEFINE_RES_REG_NAMED(VSC7512_REW_RES_START, VSC7512_REW_RES_SIZE, "rew"), + DEFINE_RES_REG_NAMED(VSC7512_SYS_RES_START, VSC7512_SYS_RES_SIZE, "sys"), + DEFINE_RES_REG_NAMED(VSC7512_S0_RES_START, VCAP_RES_SIZE, "s0"), + DEFINE_RES_REG_NAMED(VSC7512_S1_RES_START, VCAP_RES_SIZE, "s1"), + DEFINE_RES_REG_NAMED(VSC7512_S2_RES_START, VCAP_RES_SIZE, "s2"), + DEFINE_RES_REG_NAMED(VSC7512_PORT_0_RES_START, VSC7512_PORT_RES_SIZE, "port0"), + DEFINE_RES_REG_NAMED(VSC7512_PORT_1_RES_START, VSC7512_PORT_RES_SIZE, "port1"), + DEFINE_RES_REG_NAMED(VSC7512_PORT_2_RES_START, VSC7512_PORT_RES_SIZE, "port2"), + DEFINE_RES_REG_NAMED(VSC7512_PORT_3_RES_START, VSC7512_PORT_RES_SIZE, "port3"), + DEFINE_RES_REG_NAMED(VSC7512_PORT_4_RES_START, VSC7512_PORT_RES_SIZE, "port4"), + DEFINE_RES_REG_NAMED(VSC7512_PORT_5_RES_START, VSC7512_PORT_RES_SIZE, "port5"), + DEFINE_RES_REG_NAMED(VSC7512_PORT_6_RES_START, VSC7512_PORT_RES_SIZE, "port6"), + DEFINE_RES_REG_NAMED(VSC7512_PORT_7_RES_START, VSC7512_PORT_RES_SIZE, "port7"), + DEFINE_RES_REG_NAMED(VSC7512_PORT_8_RES_START, VSC7512_PORT_RES_SIZE, "port8"), + DEFINE_RES_REG_NAMED(VSC7512_PORT_9_RES_START, VSC7512_PORT_RES_SIZE, "port9"), + DEFINE_RES_REG_NAMED(VSC7512_PORT_10_RES_START, VSC7512_PORT_RES_SIZE, "port10") +}; + +static const struct mfd_cell vsc7512_devs[] = { + { + .name = "ocelot-pinctrl", + .of_compatible = "mscc,ocelot-pinctrl", + .num_resources = ARRAY_SIZE(vsc7512_pinctrl_resources), + .resources = vsc7512_pinctrl_resources, + }, { + .name = "ocelot-sgpio", + .of_compatible = "mscc,ocelot-sgpio", + .num_resources = ARRAY_SIZE(vsc7512_sgpio_resources), + .resources = vsc7512_sgpio_resources, + }, { + .name = "ocelot-miim0", + .of_compatible = "mscc,ocelot-miim", + .of_reg = VSC7512_MIIM0_RES_START, + .use_of_reg = true, + .num_resources = ARRAY_SIZE(vsc7512_miim0_resources), + .resources = vsc7512_miim0_resources, + }, { + .name = "ocelot-miim1", + .of_compatible = "mscc,ocelot-miim", + .of_reg = VSC7512_MIIM1_RES_START, + .use_of_reg = true, + .num_resources = ARRAY_SIZE(vsc7512_miim1_resources), + .resources = vsc7512_miim1_resources, + }, { + .name = "ocelot-serdes", + .of_compatible = "mscc,vsc7514-serdes", + .num_resources = ARRAY_SIZE(vsc7512_serdes_resources), + .resources = vsc7512_serdes_resources, + }, { + .name = "ocelot-ext-switch", + .of_compatible = "mscc,vsc7512-switch", + .num_resources = ARRAY_SIZE(vsc7512_switch_resources), + .resources = vsc7512_switch_resources, + }, +}; + +static void ocelot_core_try_add_regmap(struct device *dev, + const struct resource *res) +{ + if (dev_get_regmap(dev, res->name)) + return; + + ocelot_spi_init_regmap(dev, res); +} + +static void ocelot_core_try_add_regmaps(struct device *dev, + const struct mfd_cell *cell) +{ + int i; + + for (i = 0; i < cell->num_resources; i++) + ocelot_core_try_add_regmap(dev, &cell->resources[i]); +} + +int ocelot_core_init(struct device *dev) +{ + int i, ndevs; + + ndevs = ARRAY_SIZE(vsc7512_devs); + + for (i = 0; i < ndevs; i++) + ocelot_core_try_add_regmaps(dev, &vsc7512_devs[i]); + + return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, vsc7512_devs, ndevs, NULL, 0, NULL); +} +EXPORT_SYMBOL_NS(ocelot_core_init, MFD_OCELOT); + +MODULE_DESCRIPTION("Externally Controlled Ocelot Chip Driver"); +MODULE_AUTHOR("Colin Foster <colin.foster@in-advantage.com>"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS(MFD_OCELOT_SPI); |