diff options
Diffstat (limited to 'drivers/net/ethernet/mscc/ocelot_io.c')
-rw-r--r-- | drivers/net/ethernet/mscc/ocelot_io.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mscc/ocelot_io.c b/drivers/net/ethernet/mscc/ocelot_io.c new file mode 100644 index 000000000..2067382d0 --- /dev/null +++ b/drivers/net/ethernet/mscc/ocelot_io.c @@ -0,0 +1,164 @@ +// SPDX-License-Identifier: (GPL-2.0 OR MIT) +/* + * Microsemi Ocelot Switch driver + * + * Copyright (c) 2017 Microsemi Corporation + */ +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> + +#include "ocelot.h" + +int __ocelot_bulk_read_ix(struct ocelot *ocelot, u32 reg, u32 offset, void *buf, + int count) +{ + u16 target = reg >> TARGET_OFFSET; + + WARN_ON(!target); + + return regmap_bulk_read(ocelot->targets[target], + ocelot->map[target][reg & REG_MASK] + offset, + buf, count); +} +EXPORT_SYMBOL_GPL(__ocelot_bulk_read_ix); + +u32 __ocelot_read_ix(struct ocelot *ocelot, u32 reg, u32 offset) +{ + u16 target = reg >> TARGET_OFFSET; + u32 val; + + WARN_ON(!target); + + regmap_read(ocelot->targets[target], + ocelot->map[target][reg & REG_MASK] + offset, &val); + return val; +} +EXPORT_SYMBOL_GPL(__ocelot_read_ix); + +void __ocelot_write_ix(struct ocelot *ocelot, u32 val, u32 reg, u32 offset) +{ + u16 target = reg >> TARGET_OFFSET; + + WARN_ON(!target); + + regmap_write(ocelot->targets[target], + ocelot->map[target][reg & REG_MASK] + offset, val); +} +EXPORT_SYMBOL_GPL(__ocelot_write_ix); + +void __ocelot_rmw_ix(struct ocelot *ocelot, u32 val, u32 mask, u32 reg, + u32 offset) +{ + u16 target = reg >> TARGET_OFFSET; + + WARN_ON(!target); + + regmap_update_bits(ocelot->targets[target], + ocelot->map[target][reg & REG_MASK] + offset, + mask, val); +} +EXPORT_SYMBOL_GPL(__ocelot_rmw_ix); + +u32 ocelot_port_readl(struct ocelot_port *port, u32 reg) +{ + struct ocelot *ocelot = port->ocelot; + u16 target = reg >> TARGET_OFFSET; + u32 val; + + WARN_ON(!target); + + regmap_read(port->target, ocelot->map[target][reg & REG_MASK], &val); + return val; +} +EXPORT_SYMBOL_GPL(ocelot_port_readl); + +void ocelot_port_writel(struct ocelot_port *port, u32 val, u32 reg) +{ + struct ocelot *ocelot = port->ocelot; + u16 target = reg >> TARGET_OFFSET; + + WARN_ON(!target); + + regmap_write(port->target, ocelot->map[target][reg & REG_MASK], val); +} +EXPORT_SYMBOL_GPL(ocelot_port_writel); + +void ocelot_port_rmwl(struct ocelot_port *port, u32 val, u32 mask, u32 reg) +{ + u32 cur = ocelot_port_readl(port, reg); + + ocelot_port_writel(port, (cur & (~mask)) | val, reg); +} +EXPORT_SYMBOL_GPL(ocelot_port_rmwl); + +u32 __ocelot_target_read_ix(struct ocelot *ocelot, enum ocelot_target target, + u32 reg, u32 offset) +{ + u32 val; + + regmap_read(ocelot->targets[target], + ocelot->map[target][reg] + offset, &val); + return val; +} + +void __ocelot_target_write_ix(struct ocelot *ocelot, enum ocelot_target target, + u32 val, u32 reg, u32 offset) +{ + regmap_write(ocelot->targets[target], + ocelot->map[target][reg] + offset, val); +} + +int ocelot_regfields_init(struct ocelot *ocelot, + const struct reg_field *const regfields) +{ + unsigned int i; + u16 target; + + for (i = 0; i < REGFIELD_MAX; i++) { + struct reg_field regfield = {}; + u32 reg = regfields[i].reg; + + if (!reg) + continue; + + target = regfields[i].reg >> TARGET_OFFSET; + + regfield.reg = ocelot->map[target][reg & REG_MASK]; + regfield.lsb = regfields[i].lsb; + regfield.msb = regfields[i].msb; + regfield.id_size = regfields[i].id_size; + regfield.id_offset = regfields[i].id_offset; + + ocelot->regfields[i] = + devm_regmap_field_alloc(ocelot->dev, + ocelot->targets[target], + regfield); + + if (IS_ERR(ocelot->regfields[i])) + return PTR_ERR(ocelot->regfields[i]); + } + + return 0; +} +EXPORT_SYMBOL_GPL(ocelot_regfields_init); + +static struct regmap_config ocelot_regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, +}; + +struct regmap *ocelot_regmap_init(struct ocelot *ocelot, struct resource *res) +{ + void __iomem *regs; + + regs = devm_ioremap_resource(ocelot->dev, res); + if (IS_ERR(regs)) + return ERR_CAST(regs); + + ocelot_regmap_config.name = res->name; + + return devm_regmap_init_mmio(ocelot->dev, regs, &ocelot_regmap_config); +} +EXPORT_SYMBOL_GPL(ocelot_regmap_init); |