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https://github.com/freebsd/freebsd-src
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vf_i2c: split up and add ACPI attachments in addition to FDT
Move the code from the arm specific to the iicbus controller directory. Split up between general logic and bus attachment code. Add support for ACPI attachment in addition to FDT. MFC after: 7 days Tested by: bz (LS1088a FDT), Pierre-Luc Drouin (Honeycomb, ACPI) Based on: D24917 by Val Packett (initial early version) Differential Revision: https://reviews.freebsd.org/D44020
This commit is contained in:
Pierre-Luc Drouin
Bjoern A. Zeeb
parent
b977dd1ea5
commit
5ca8e32633
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@ -9,7 +9,8 @@ arm/freescale/vybrid/vf_edma.c standard
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arm/freescale/vybrid/vf_dmamux.c standard
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arm/freescale/vybrid/vf_port.c standard
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arm/freescale/vybrid/vf_adc.c standard
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arm/freescale/vybrid/vf_i2c.c optional iicbus
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dev/iicbus/controller/vybrid/vf_i2c.c optional iicbus
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dev/iicbus/controller/vybrid/vf_i2c_fdt.c optional iicbus fdt
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arm/freescale/vybrid/vf_tcon.c optional vt
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arm/freescale/vybrid/vf_dcu4.c optional vt
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arm/freescale/vybrid/vf_nfc.c optional nand
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@ -669,7 +669,9 @@ tegra210_xusb.fw optional tegra210_xusb_fw \
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clean "tegra210_xusb.fw"
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# NXP
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arm/freescale/vybrid/vf_i2c.c optional vf_i2c iicbus soc_nxp_ls
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dev/iicbus/controller/vybrid/vf_i2c.c optional vf_i2c iicbus soc_nxp_ls
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dev/iicbus/controller/vybrid/vf_i2c_acpi.c optional vf_i2c iicbus acpi soc_nxp_ls
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dev/iicbus/controller/vybrid/vf_i2c_fdt.c optional vf_i2c iicbus fdt soc_nxp_ls
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arm64/qoriq/qoriq_dw_pci.c optional pci fdt soc_nxp_ls
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arm64/qoriq/qoriq_gpio_pic.c optional gpio fdt soc_nxp_ls
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arm64/qoriq/qoriq_therm.c optional pci fdt soc_nxp_ls
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@ -2,7 +2,7 @@
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
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* All rights reserved.
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* Copyright (c) 2024 Pierre-Luc Drouin <pldrouin@pldrouin.net>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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@ -29,12 +29,14 @@
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/*
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* Vybrid Family Inter-Integrated Circuit (I2C)
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* Chapter 48, Vybrid Reference Manual, Rev. 5, 07/2013
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*
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* The current implementation is based on the original driver by Ruslan Bukin,
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* later modified by Dawid Górecki, and split into FDT and ACPI drivers by Val
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* Packett.
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*/
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/*
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* This driver is based on the I2C driver for i.MX
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*/
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#include <sys/types.h>
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#include <sys/mutex.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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@ -50,17 +52,11 @@
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#include "iicbus_if.h"
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/clk/clk.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/intr.h>
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#include <arm/freescale/vybrid/vf_common.h>
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#include <dev/iicbus/controller/vybrid/vf_i2c.h>
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#define I2C_IBAD 0x0 /* I2C Bus Address Register */
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#define I2C_IBFD 0x1 /* I2C Bus Frequency Divider Register */
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@ -85,42 +81,44 @@
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#define IBIC_BIIE (1 << 7) /* Bus Idle Interrupt Enable bit. */
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#define I2C_IBDBG 0x6 /* I2C Bus Debug Register */
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#define DIV_REG_UNSET 0xFF
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#define READ1(_sc, _reg) bus_space_read_1(_sc->bst, _sc->bsh, _reg)
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#define WRITE1(_sc, _reg, _val) bus_space_write_1(_sc->bst,\
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_sc->bsh, _reg, _val)
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#ifdef DEBUG
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#define vf_i2c_dbg(_sc, fmt, args...) \
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device_printf((_sc)->dev, fmt, ##args)
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#ifdef DEBUG2
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#undef WRITE1
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#define WRITE1(_sc, _reg, _val) ({\
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vf_i2c_dbg(_sc, "WRITE1 REG 0x%02X VAL 0x%02X\n",_reg,_val);\
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bus_space_write_1(_sc->bst, _sc->bsh, _reg, _val);\
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})
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#undef READ1
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#define READ1(_sc, _reg) ({\
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uint32_t ret=bus_space_read_1(_sc->bst, _sc->bsh, _reg);\
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vf_i2c_dbg(_sc, "READ1 REG 0x%02X RETURNS 0x%02X\n",_reg,ret);\
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ret;\
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})
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#endif
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#else
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#define vf_i2c_dbg(_sc, fmt, args...)
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#endif
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#define HW_UNKNOWN 0x00
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#define HW_MVF600 0x01
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#define HW_VF610 0x02
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static int i2c_repeated_start(device_t, u_char, int);
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static int i2c_start(device_t, u_char, int);
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static int i2c_stop(device_t);
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static int i2c_reset(device_t, u_char, u_char, u_char *);
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static int i2c_read(device_t, char *, int, int *, int, int);
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static int i2c_write(device_t, const char *, int, int *, int);
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static phandle_t i2c_get_node(device_t, device_t);
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struct i2c_div_type {
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uint32_t reg_val;
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uint32_t div;
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};
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struct i2c_softc {
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struct resource *res[2];
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bus_space_tag_t bst;
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bus_space_handle_t bsh;
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clk_t clock;
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uint32_t freq;
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device_t dev;
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device_t iicbus;
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struct mtx mutex;
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uintptr_t hwtype;
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};
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static struct resource_spec i2c_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE },
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{ SYS_RES_IRQ, 0, RF_ACTIVE },
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@ -143,49 +141,15 @@ static struct i2c_div_type vf610_div_table[] = {
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{ 0x3F, 3840 }, { 0x7B, 4096 }, { 0x7D, 5120 }, { 0x7E, 6144 },
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};
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static const struct ofw_compat_data i2c_compat_data[] = {
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{"fsl,mvf600-i2c", HW_MVF600},
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{"fsl,vf610-i2c", HW_VF610},
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{NULL, HW_UNKNOWN}
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};
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static int
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i2c_probe(device_t dev)
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int
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vf_i2c_attach_common(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (!ofw_bus_search_compatible(dev, i2c_compat_data)->ocd_data)
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return (ENXIO);
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device_set_desc(dev, "Vybrid Family Inter-Integrated Circuit (I2C)");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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i2c_attach(device_t dev)
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{
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struct i2c_softc *sc;
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phandle_t node;
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struct vf_i2c_softc *sc;
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int error;
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sc = device_get_softc(dev);
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sc->dev = dev;
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sc->hwtype = ofw_bus_search_compatible(dev, i2c_compat_data)->ocd_data;
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node = ofw_bus_get_node(dev);
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error = clk_get_by_ofw_index(dev, node, 0, &sc->clock);
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if (error != 0) {
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sc->freq = 0;
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device_printf(dev, "Parent clock not found.\n");
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} else {
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if (OF_hasprop(node, "clock-frequency"))
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OF_getencprop(node, "clock-frequency", &sc->freq,
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sizeof(sc->freq));
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else
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sc->freq = 100000;
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}
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vf_i2c_dbg(sc, "i2c attach common\n");
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mtx_init(&sc->mutex, device_get_nameunit(dev), "I2C", MTX_DEF);
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@ -200,8 +164,25 @@ i2c_attach(device_t dev)
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sc->bst = rman_get_bustag(sc->res[0]);
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sc->bsh = rman_get_bushandle(sc->res[0]);
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mtx_lock(&sc->mutex);
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WRITE1(sc, I2C_IBIC, IBIC_BIIE);
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if (sc->freq == 0) {
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uint8_t div_reg;
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div_reg = READ1(sc, I2C_IBFD);
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if (div_reg != 0x00) {
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sc->freq = UINT32_MAX;
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device_printf(dev, "Using existing bus frequency divider register value (0x%02X).\n", div_reg);
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} else {
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device_printf(dev, "Bus frequency divider value appears unset, defaulting to low I2C bus speed.\n");
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}
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}
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mtx_unlock(&sc->mutex);
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sc->iicbus = device_add_child(dev, "iicbus", -1);
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if (sc->iicbus == NULL) {
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device_printf(dev, "could not add iicbus child");
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@ -218,10 +199,18 @@ i2c_attach(device_t dev)
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static int
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i2c_detach(device_t dev)
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{
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struct i2c_softc *sc;
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struct vf_i2c_softc *sc;
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int error = 0;
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sc = device_get_softc(dev);
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vf_i2c_dbg(sc, "i2c detach\n");
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mtx_lock(&sc->mutex);
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if (sc->freq == 0) {
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vf_i2c_dbg(sc, "Writing 0x00 to clock divider register\n");
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WRITE1(sc, I2C_IBFD, 0x00);
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}
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error = bus_generic_detach(dev);
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if (error != 0) {
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@ -237,6 +226,8 @@ i2c_detach(device_t dev)
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bus_release_resources(dev, i2c_spec, sc->res);
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mtx_unlock(&sc->mutex);
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mtx_destroy(&sc->mutex);
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return (0);
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@ -244,7 +235,7 @@ i2c_detach(device_t dev)
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/* Wait for transfer interrupt flag */
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static int
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wait_for_iif(struct i2c_softc *sc)
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wait_for_iif(struct vf_i2c_softc *sc)
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{
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int retry;
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@ -262,7 +253,7 @@ wait_for_iif(struct i2c_softc *sc)
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/* Wait for free bus */
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static int
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wait_for_nibb(struct i2c_softc *sc)
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wait_for_nibb(struct vf_i2c_softc *sc)
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{
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int retry;
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@ -278,7 +269,7 @@ wait_for_nibb(struct i2c_softc *sc)
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/* Wait for transfer complete+interrupt flag */
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static int
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wait_for_icf(struct i2c_softc *sc)
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wait_for_icf(struct vf_i2c_softc *sc)
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{
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int retry;
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@ -297,8 +288,9 @@ wait_for_icf(struct i2c_softc *sc)
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}
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/* Get ACK bit from last write */
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static bool
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tx_acked(struct i2c_softc *sc)
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tx_acked(struct vf_i2c_softc *sc)
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{
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vf_i2c_dbg(sc, "i2c get ACK bit from last write\n");
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return (READ1(sc, I2C_IBSR) & IBSR_RXAK) ? false : true;
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@ -307,7 +299,7 @@ tx_acked(struct i2c_softc *sc)
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static int
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i2c_repeated_start(device_t dev, u_char slave, int timeout)
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{
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struct i2c_softc *sc;
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struct vf_i2c_softc *sc;
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int error;
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int reg;
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@ -355,7 +347,7 @@ i2c_repeated_start(device_t dev, u_char slave, int timeout)
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static int
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i2c_start(device_t dev, u_char slave, int timeout)
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{
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struct i2c_softc *sc;
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struct vf_i2c_softc *sc;
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int error;
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int reg;
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@ -405,7 +397,7 @@ i2c_start(device_t dev, u_char slave, int timeout)
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static int
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i2c_stop(device_t dev)
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{
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struct i2c_softc *sc;
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struct vf_i2c_softc *sc;
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sc = device_get_softc(dev);
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@ -428,45 +420,53 @@ i2c_stop(device_t dev)
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return (IIC_NOERR);
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}
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static uint32_t
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static uint8_t
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i2c_get_div_val(device_t dev)
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{
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struct i2c_softc *sc;
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uint64_t clk_freq;
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int error, i;
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struct vf_i2c_softc *sc;
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uint8_t div_reg = DIV_REG_UNSET;
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sc = device_get_softc(dev);
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if (sc->freq == UINT32_MAX)
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return div_reg;
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#ifndef FDT
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div_reg = vf610_div_table[nitems(vf610_div_table) - 1].reg_val;
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#else
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if (sc->hwtype == HW_MVF600)
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return 20;
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div_reg = MVF600_DIV_REG;
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else if (sc->freq == 0)
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div_reg = vf610_div_table[nitems(vf610_div_table) - 1].reg_val;
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else {
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uint64_t clk_freq;
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int error, i;
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if (sc->freq == 0)
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return vf610_div_table[nitems(vf610_div_table) - 1].reg_val;
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error = clk_get_freq(sc->clock, &clk_freq);
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if (error != 0) {
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device_printf(dev, "Could not get parent clock frequency. "
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"Using default divider.\n");
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div_reg = vf610_div_table[nitems(vf610_div_table) - 1].reg_val;
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} else {
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error = clk_get_freq(sc->clock, &clk_freq);
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if (error != 0) {
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device_printf(dev, "Could not get parent clock frequency. "
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"Using default divider.\n");
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return vf610_div_table[nitems(vf610_div_table) - 1].reg_val;
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for (i = 0; i < nitems(vf610_div_table) - 1; i++)
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if ((clk_freq / vf610_div_table[i].div) <= sc->freq)
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break;
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div_reg = vf610_div_table[i].reg_val;
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}
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}
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for (i = 0; i < nitems(vf610_div_table) - 1; i++)
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if ((clk_freq / vf610_div_table[i].div) <= sc->freq)
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break;
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return vf610_div_table[i].reg_val;
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#endif
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vf_i2c_dbg(sc, "Writing 0x%02X to clock divider register\n", div_reg);
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return div_reg;
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}
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static int
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i2c_reset(device_t dev, u_char speed, u_char addr, u_char *oldadr)
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{
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struct i2c_softc *sc;
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uint32_t div;
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struct vf_i2c_softc *sc;
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uint8_t div_reg;
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sc = device_get_softc(dev);
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div = i2c_get_div_val(dev);
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vf_i2c_dbg(sc, "Div val: %02x\n", div);
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div_reg = i2c_get_div_val(dev);
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vf_i2c_dbg(sc, "i2c reset\n");
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switch (speed) {
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@ -483,7 +483,9 @@ i2c_reset(device_t dev, u_char speed, u_char addr, u_char *oldadr)
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DELAY(1000);
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WRITE1(sc, I2C_IBFD, div);
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if(div_reg != DIV_REG_UNSET)
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WRITE1(sc, I2C_IBFD, div_reg);
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WRITE1(sc, I2C_IBCR, 0x0); /* Enable i2c */
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DELAY(1000);
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@ -496,7 +498,7 @@ i2c_reset(device_t dev, u_char speed, u_char addr, u_char *oldadr)
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static int
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i2c_read(device_t dev, char *buf, int len, int *read, int last, int delay)
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{
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struct i2c_softc *sc;
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struct vf_i2c_softc *sc;
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int error;
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sc = device_get_softc(dev);
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@ -548,7 +550,7 @@ i2c_read(device_t dev, char *buf, int len, int *read, int last, int delay)
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static int
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i2c_write(device_t dev, const char *buf, int len, int *sent, int timeout)
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{
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struct i2c_softc *sc;
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struct vf_i2c_softc *sc;
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int error;
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sc = device_get_softc(dev);
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@ -579,20 +581,20 @@ i2c_write(device_t dev, const char *buf, int len, int *sent, int timeout)
|
|||
return (IIC_NOERR);
|
||||
}
|
||||
|
||||
static phandle_t
|
||||
i2c_get_node(device_t bus, device_t dev)
|
||||
{
|
||||
|
||||
return ofw_bus_get_node(bus);
|
||||
}
|
||||
|
||||
static device_method_t i2c_methods[] = {
|
||||
DEVMETHOD(device_probe, i2c_probe),
|
||||
DEVMETHOD(device_attach, i2c_attach),
|
||||
/* Device interface */
|
||||
DEVMETHOD(device_detach, i2c_detach),
|
||||
|
||||
DEVMETHOD(ofw_bus_get_node, i2c_get_node),
|
||||
/* Device interface */
|
||||
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
|
||||
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
|
||||
DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
|
||||
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
|
||||
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
|
||||
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
|
||||
DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource),
|
||||
|
||||
/* iicbus interface */
|
||||
DEVMETHOD(iicbus_callback, iicbus_null_callback),
|
||||
DEVMETHOD(iicbus_repeated_start, i2c_repeated_start),
|
||||
DEVMETHOD(iicbus_start, i2c_start),
|
||||
|
|
@ -601,10 +603,11 @@ static device_method_t i2c_methods[] = {
|
|||
DEVMETHOD(iicbus_read, i2c_read),
|
||||
DEVMETHOD(iicbus_write, i2c_write),
|
||||
DEVMETHOD(iicbus_transfer, iicbus_transfer_gen),
|
||||
{ 0, 0 }
|
||||
DEVMETHOD_END
|
||||
};
|
||||
|
||||
static DEFINE_CLASS_0(i2c, i2c_driver, i2c_methods, sizeof(struct i2c_softc));
|
||||
DRIVER_MODULE(vybrid_i2c, simplebus, i2c_driver, 0, 0);
|
||||
DRIVER_MODULE(iicbus, i2c, iicbus_driver, 0, 0);
|
||||
DRIVER_MODULE(ofw_iicbus, i2c, ofw_iicbus_driver, 0, 0);
|
||||
driver_t vf_i2c_driver = {
|
||||
"i2c",
|
||||
i2c_methods,
|
||||
sizeof(struct vf_i2c_softc),
|
||||
};
|
||||
75
sys/dev/iicbus/controller/vybrid/vf_i2c.h
Normal file
75
sys/dev/iicbus/controller/vybrid/vf_i2c.h
Normal file
|
|
@ -0,0 +1,75 @@
|
|||
/*-
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*
|
||||
* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
|
||||
* Copyright (c) 2024 Pierre-Luc Drouin <pldrouin@pldrouin.net>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Vybrid Family Inter-Integrated Circuit (I2C)
|
||||
* Chapter 48, Vybrid Reference Manual, Rev. 5, 07/2013
|
||||
*
|
||||
* The current implementation is based on the original driver by Ruslan Bukin,
|
||||
* later modified by Dawid Górecki, and split into FDT and ACPI drivers by Val
|
||||
* Packett.
|
||||
*/
|
||||
|
||||
#ifndef __VF_I2C_H__
|
||||
#define __VF_I2C_H__
|
||||
|
||||
#include "opt_acpi.h"
|
||||
#include "opt_platform.h"
|
||||
|
||||
#ifdef FDT
|
||||
#include <dev/clk/clk.h>
|
||||
#endif
|
||||
|
||||
#define VF_I2C_DEVSTR "Vybrid Family Inter-Integrated Circuit (I2C)"
|
||||
|
||||
#define HW_MVF600 0x01
|
||||
#define HW_VF610 0x02
|
||||
|
||||
#define MVF600_DIV_REG 0x14
|
||||
|
||||
#define VF_I2C_DEFAULT_BUS_SPEED 100000
|
||||
|
||||
struct vf_i2c_softc {
|
||||
struct resource *res[2];
|
||||
bus_space_tag_t bst;
|
||||
bus_space_handle_t bsh;
|
||||
uint32_t freq;
|
||||
device_t dev;
|
||||
device_t iicbus;
|
||||
struct mtx mutex;
|
||||
uintptr_t hwtype;
|
||||
#ifdef FDT
|
||||
clk_t clock;
|
||||
#endif
|
||||
};
|
||||
|
||||
extern driver_t vf_i2c_driver;
|
||||
|
||||
device_attach_t vf_i2c_attach_common;
|
||||
|
||||
#endif /* !__VF_I2C_H__ */
|
||||
101
sys/dev/iicbus/controller/vybrid/vf_i2c_acpi.c
Normal file
101
sys/dev/iicbus/controller/vybrid/vf_i2c_acpi.c
Normal file
|
|
@ -0,0 +1,101 @@
|
|||
/*-
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*
|
||||
* Copyright (c) 2024 Pierre-Luc Drouin <pldrouin@pldrouin.net>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Vybrid Family Inter-Integrated Circuit (I2C)
|
||||
* Chapter 48, Vybrid Reference Manual, Rev. 5, 07/2013
|
||||
*
|
||||
* The current implementation is based on the original driver by Ruslan Bukin,
|
||||
* later modified by Dawid Górecki, and split into FDT and ACPI drivers by Val
|
||||
* Packett.
|
||||
*/
|
||||
|
||||
#include "opt_acpi.h"
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/bus.h>
|
||||
#include <sys/kernel.h>
|
||||
#include <sys/module.h>
|
||||
#include <sys/rman.h>
|
||||
|
||||
#include <contrib/dev/acpica/include/acpi.h>
|
||||
#include <contrib/dev/acpica/include/accommon.h>
|
||||
|
||||
#include <dev/acpica/acpivar.h>
|
||||
#include <dev/iicbus/iicbus.h>
|
||||
#include <dev/iicbus/iiconf.h>
|
||||
|
||||
#include <dev/iicbus/controller/vybrid/vf_i2c.h>
|
||||
|
||||
static char *vf_i2c_ids[] = {
|
||||
"NXP0001",
|
||||
NULL
|
||||
};
|
||||
|
||||
static int
|
||||
vf_i2c_acpi_probe(device_t dev)
|
||||
{
|
||||
int rv;
|
||||
|
||||
if (acpi_disabled("vf_i2c"))
|
||||
return (ENXIO);
|
||||
|
||||
rv = ACPI_ID_PROBE(device_get_parent(dev), dev, vf_i2c_ids, NULL);
|
||||
if (rv > 0)
|
||||
return (rv);
|
||||
|
||||
device_set_desc(dev, VF_I2C_DEVSTR);
|
||||
return (BUS_PROBE_DEFAULT);
|
||||
}
|
||||
|
||||
static int
|
||||
vf_i2c_acpi_attach(device_t dev)
|
||||
{
|
||||
struct vf_i2c_softc *sc;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
sc->dev = dev;
|
||||
sc->hwtype = HW_VF610;
|
||||
sc->freq = 0;
|
||||
|
||||
return (vf_i2c_attach_common(dev));
|
||||
}
|
||||
|
||||
static device_method_t vf_i2c_acpi_methods[] = {
|
||||
/* Device interface */
|
||||
DEVMETHOD(device_probe, vf_i2c_acpi_probe),
|
||||
DEVMETHOD(device_attach, vf_i2c_acpi_attach),
|
||||
DEVMETHOD_END
|
||||
};
|
||||
|
||||
DEFINE_CLASS_1(vf_i2c_acpi, vf_i2c_acpi_driver, vf_i2c_acpi_methods,
|
||||
sizeof(struct vf_i2c_softc), vf_i2c_driver);
|
||||
|
||||
DRIVER_MODULE(vf_i2c_acpi, acpi, vf_i2c_acpi_driver, 0, 0);
|
||||
DRIVER_MODULE(iicbus, vf_i2c_acpi, iicbus_driver, 0, 0);
|
||||
DRIVER_MODULE(acpi_iicbus, vf_i2c_acpi, acpi_iicbus_driver, 0, 0);
|
||||
122
sys/dev/iicbus/controller/vybrid/vf_i2c_fdt.c
Normal file
122
sys/dev/iicbus/controller/vybrid/vf_i2c_fdt.c
Normal file
|
|
@ -0,0 +1,122 @@
|
|||
/*-
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*
|
||||
* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
|
||||
* Copyright (c) 2024 Pierre-Luc Drouin <pldrouin@pldrouin.net>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Vybrid Family Inter-Integrated Circuit (I2C)
|
||||
* Chapter 48, Vybrid Reference Manual, Rev. 5, 07/2013
|
||||
*
|
||||
* The current implementation is based on the original driver by Ruslan Bukin,
|
||||
* later modified by Dawid Górecki, and split into FDT and ACPI drivers by Val
|
||||
* Packett.
|
||||
*/
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/bus.h>
|
||||
#include <sys/kernel.h>
|
||||
#include <sys/module.h>
|
||||
#include <sys/malloc.h>
|
||||
#include <sys/rman.h>
|
||||
|
||||
#include <dev/ofw/openfirm.h>
|
||||
#include <dev/ofw/ofw_bus.h>
|
||||
#include <dev/ofw/ofw_bus_subr.h>
|
||||
|
||||
#include <dev/iicbus/iicbus.h>
|
||||
|
||||
#include <dev/iicbus/controller/vybrid/vf_i2c.h>
|
||||
|
||||
static const struct ofw_compat_data vf_i2c_compat_data[] = {
|
||||
{"fsl,mvf600-i2c", HW_MVF600},
|
||||
{"fsl,vf610-i2c", HW_VF610},
|
||||
{NULL, 0}
|
||||
};
|
||||
|
||||
static int
|
||||
vf_i2c_fdt_probe(device_t dev)
|
||||
{
|
||||
|
||||
if (!ofw_bus_status_okay(dev))
|
||||
return (ENXIO);
|
||||
|
||||
if (ofw_bus_search_compatible(dev, vf_i2c_compat_data)->ocd_data == 0)
|
||||
return (ENXIO);
|
||||
|
||||
device_set_desc(dev, VF_I2C_DEVSTR);
|
||||
return (BUS_PROBE_DEFAULT);
|
||||
}
|
||||
|
||||
static int
|
||||
vf_i2c_fdt_attach(device_t dev)
|
||||
{
|
||||
struct vf_i2c_softc *sc;
|
||||
phandle_t node;
|
||||
int error;
|
||||
|
||||
sc = device_get_softc(dev);
|
||||
sc->dev = dev;
|
||||
sc->hwtype = ofw_bus_search_compatible(dev, vf_i2c_compat_data)->ocd_data;
|
||||
node = ofw_bus_get_node(dev);
|
||||
|
||||
error = clk_get_by_ofw_index(dev, node, 0, &sc->clock);
|
||||
if (error != 0) {
|
||||
sc->freq = 0;
|
||||
device_printf(dev, "Parent clock not found.\n");
|
||||
} else {
|
||||
if (OF_hasprop(node, "clock-frequency"))
|
||||
OF_getencprop(node, "clock-frequency", &sc->freq,
|
||||
sizeof(sc->freq));
|
||||
else
|
||||
sc->freq = VF_I2C_DEFAULT_BUS_SPEED;
|
||||
}
|
||||
return (vf_i2c_attach_common(dev));
|
||||
}
|
||||
|
||||
static phandle_t
|
||||
vf_i2c_get_node(device_t bus, device_t dev)
|
||||
{
|
||||
return (ofw_bus_get_node(bus));
|
||||
}
|
||||
|
||||
static device_method_t vf_i2c_fdt_methods[] = {
|
||||
/* Device interface */
|
||||
DEVMETHOD(device_probe, vf_i2c_fdt_probe),
|
||||
DEVMETHOD(device_attach, vf_i2c_fdt_attach),
|
||||
|
||||
/* ofw_bus interface */
|
||||
DEVMETHOD(ofw_bus_get_node, vf_i2c_get_node),
|
||||
DEVMETHOD_END
|
||||
};
|
||||
|
||||
DEFINE_CLASS_1(vf_i2c_fdt, vf_i2c_fdt_driver, vf_i2c_fdt_methods,
|
||||
sizeof(struct vf_i2c_softc), vf_i2c_driver);
|
||||
|
||||
DRIVER_MODULE(vf_i2c_fdt, simplebus, vf_i2c_fdt_driver, 0, 0);
|
||||
DRIVER_MODULE(iicbus, vf_i2c_fdt, iicbus_driver, 0, 0);
|
||||
DRIVER_MODULE(ofw_iicbus, vf_i2c_fdt, ofw_iicbus_driver, 0, 0);
|
||||
|
||||
|
|
@ -397,6 +397,7 @@ SUBDIR= \
|
|||
unionfs \
|
||||
usb \
|
||||
${_vesa} \
|
||||
${_vf_i2c} \
|
||||
virtio \
|
||||
vge \
|
||||
${_viawd} \
|
||||
|
|
@ -686,6 +687,7 @@ _dpaa2= dpaa2
|
|||
_sff= sff
|
||||
_em= em
|
||||
_hyperv= hyperv
|
||||
_vf_i2c= vf_i2c
|
||||
|
||||
.if !empty(OPT_FDT)
|
||||
_allwinner= allwinner
|
||||
|
|
|
|||
14
sys/modules/vf_i2c/Makefile
Normal file
14
sys/modules/vf_i2c/Makefile
Normal file
|
|
@ -0,0 +1,14 @@
|
|||
.PATH: ${SRCTOP}/sys/dev/iicbus/controller/vybrid
|
||||
|
||||
KMOD= vf_i2c
|
||||
SRCS= vf_i2c.c vf_i2c.h
|
||||
SRCS+= device_if.h bus_if.h iicbus_if.h
|
||||
SRCS+= opt_acpi.h opt_platform.h
|
||||
|
||||
SRCS.DEV_ACPI= vf_i2c_acpi.c acpi_if.h
|
||||
|
||||
.if !empty(OPT_FDT)
|
||||
SRCS+= vf_i2c_fdt.c ofw_bus_if.h clknode_if.h
|
||||
.endif
|
||||
|
||||
.include <bsd.kmod.mk>
|
||||
Loading…
Reference in a new issue