356 lines
8.7 KiB
C
356 lines
8.7 KiB
C
/*-
|
|
* Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
|
|
* Copyright (c) 2011, Aleksandr Rybalko <ray@FreeBSD.org>
|
|
* Copyright (c) 2013, Alexander A. Mityaev <sansan@adm.ua>
|
|
* Copyright (c) 2016, Stanislav Galabov <sgalabov@gmail.com>
|
|
* All rights reserved.
|
|
*
|
|
* 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 unmodified, 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#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 <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
|
|
#include <machine/bus.h>
|
|
#include <machine/cpu.h>
|
|
|
|
#include <dev/spibus/spi.h>
|
|
#include <dev/spibus/spibusvar.h>
|
|
#include "spibus_if.h"
|
|
|
|
#include "opt_platform.h"
|
|
|
|
#include <dev/ofw/openfirm.h>
|
|
#include <dev/ofw/ofw_bus.h>
|
|
#include <dev/ofw/ofw_bus_subr.h>
|
|
|
|
#include <mips/mediatek/mtk_spi_v2.h>
|
|
#include <dev/flash/mx25lreg.h>
|
|
|
|
#undef MTK_SPI_DEBUG
|
|
#ifdef MTK_SPI_DEBUG
|
|
#define dprintf printf
|
|
#else
|
|
#define dprintf(x, arg...)
|
|
#endif
|
|
|
|
/*
|
|
* register space access macros
|
|
*/
|
|
#define SPI_WRITE(sc, reg, val) do { \
|
|
bus_write_4(sc->sc_mem_res, (reg), (val)); \
|
|
} while (0)
|
|
|
|
#define SPI_READ(sc, reg) bus_read_4(sc->sc_mem_res, (reg))
|
|
|
|
#define SPI_SET_BITS(sc, reg, bits) \
|
|
SPI_WRITE(sc, reg, SPI_READ(sc, (reg)) | (bits))
|
|
|
|
#define SPI_CLEAR_BITS(sc, reg, bits) \
|
|
SPI_WRITE(sc, reg, SPI_READ(sc, (reg)) & ~(bits))
|
|
|
|
struct mtk_spi_softc {
|
|
device_t sc_dev;
|
|
struct resource *sc_mem_res;
|
|
};
|
|
|
|
static int mtk_spi_probe(device_t);
|
|
static int mtk_spi_attach(device_t);
|
|
static int mtk_spi_detach(device_t);
|
|
static int mtk_spi_wait(struct mtk_spi_softc *);
|
|
static void mtk_spi_chip_activate(struct mtk_spi_softc *);
|
|
static void mtk_spi_chip_deactivate(struct mtk_spi_softc *);
|
|
static uint8_t mtk_spi_txrx(struct mtk_spi_softc *, uint8_t *, int);
|
|
static int mtk_spi_transfer(device_t, device_t, struct spi_command *);
|
|
static phandle_t mtk_spi_get_node(device_t, device_t);
|
|
|
|
static struct ofw_compat_data compat_data[] = {
|
|
{ "ralink,mt7621-spi", 1 },
|
|
{ "ralink,mtk7628an-spi", 1 },
|
|
{ NULL, 0 }
|
|
};
|
|
|
|
static int
|
|
mtk_spi_probe(device_t dev)
|
|
{
|
|
|
|
if (!ofw_bus_status_okay(dev))
|
|
return (ENXIO);
|
|
|
|
if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
|
|
return(ENXIO);
|
|
|
|
device_set_desc(dev, "MTK SPI Controller (v2)");
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mtk_spi_attach(device_t dev)
|
|
{
|
|
struct mtk_spi_softc *sc = device_get_softc(dev);
|
|
uint32_t val;
|
|
int rid;
|
|
|
|
sc->sc_dev = dev;
|
|
rid = 0;
|
|
sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
|
|
RF_ACTIVE);
|
|
if (!sc->sc_mem_res) {
|
|
device_printf(dev, "Could not map memory\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
if (mtk_spi_wait(sc)) {
|
|
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
|
|
return (EBUSY);
|
|
}
|
|
|
|
val = SPI_READ(sc, MTK_SPIMASTER);
|
|
val &= ~(0xfff << 16);
|
|
val |= 13 << 16;
|
|
val |= 7 << 29;
|
|
val |= 1 << 2;
|
|
SPI_WRITE(sc, MTK_SPIMASTER, val);
|
|
/*
|
|
* W25Q64CV max 104MHz, bus 120-192 MHz, so divide by 2.
|
|
* Update: divide by 4, DEV2 to fast for flash.
|
|
*/
|
|
|
|
device_add_child(dev, "spibus", 0);
|
|
return (bus_generic_attach(dev));
|
|
}
|
|
|
|
static int
|
|
mtk_spi_detach(device_t dev)
|
|
{
|
|
struct mtk_spi_softc *sc = device_get_softc(dev);
|
|
|
|
if (sc->sc_mem_res)
|
|
bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
mtk_spi_chip_activate(struct mtk_spi_softc *sc)
|
|
{
|
|
mtk_spi_wait(sc);
|
|
/*
|
|
* Put all CSx to low
|
|
*/
|
|
SPI_SET_BITS(sc, MTK_SPIPOLAR, 1);
|
|
}
|
|
|
|
static void
|
|
mtk_spi_chip_deactivate(struct mtk_spi_softc *sc)
|
|
{
|
|
mtk_spi_wait(sc);
|
|
/*
|
|
* Put all CSx to high
|
|
*/
|
|
SPI_CLEAR_BITS(sc, MTK_SPIPOLAR, 1);
|
|
}
|
|
|
|
static int
|
|
mtk_spi_wait(struct mtk_spi_softc *sc)
|
|
{
|
|
int i = 1000;
|
|
|
|
while (i--) {
|
|
if (!(SPI_READ(sc, MTK_SPITRANS) & SPIBUSY))
|
|
break;
|
|
}
|
|
if (i == 0) {
|
|
return (1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static uint8_t
|
|
mtk_spi_txrx(struct mtk_spi_softc *sc, uint8_t *data, int write)
|
|
{
|
|
|
|
if (mtk_spi_wait(sc))
|
|
return (0xff);
|
|
|
|
if (write == MTK_SPI_WRITE) {
|
|
SPI_WRITE(sc, MTK_SPIOPCODE, (*data));
|
|
SPI_WRITE(sc, MTK_SPIMOREBUF, (8<<24));
|
|
} else {
|
|
SPI_WRITE(sc, MTK_SPIMOREBUF, (8<<12));
|
|
}
|
|
|
|
SPI_SET_BITS(sc, MTK_SPITRANS, SPISTART);
|
|
|
|
if (mtk_spi_wait(sc))
|
|
return (0xff);
|
|
|
|
if (write == MTK_SPI_READ) {
|
|
*data = SPI_READ(sc, MTK_SPIDATA) & 0xff;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
mtk_spi_transfer(device_t dev, device_t child, struct spi_command *cmd)
|
|
{
|
|
struct mtk_spi_softc *sc;
|
|
uint8_t *buf, byte, *tx_buf;
|
|
uint32_t cs;
|
|
int i, sz, error, write = 0;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
spibus_get_cs(child, &cs);
|
|
|
|
cs &= ~SPIBUS_CS_HIGH;
|
|
|
|
if (cs != 0)
|
|
/* Only 1 CS */
|
|
return (ENXIO);
|
|
|
|
/* There is always a command to transfer. */
|
|
tx_buf = (uint8_t *)(cmd->tx_cmd);
|
|
|
|
/* Perform some fixup because MTK dont support duplex SPI */
|
|
switch(tx_buf[0]) {
|
|
case CMD_READ_IDENT:
|
|
cmd->tx_cmd_sz = 1;
|
|
cmd->rx_cmd_sz = 3;
|
|
break;
|
|
case CMD_ENTER_4B_MODE:
|
|
case CMD_EXIT_4B_MODE:
|
|
case CMD_WRITE_ENABLE:
|
|
case CMD_WRITE_DISABLE:
|
|
cmd->tx_cmd_sz = 1;
|
|
cmd->rx_cmd_sz = 0;
|
|
break;
|
|
case CMD_READ_STATUS:
|
|
cmd->tx_cmd_sz = 1;
|
|
cmd->rx_cmd_sz = 1;
|
|
break;
|
|
case CMD_READ:
|
|
case CMD_FAST_READ:
|
|
cmd->rx_cmd_sz = cmd->tx_data_sz = 0;
|
|
break;
|
|
case CMD_SECTOR_ERASE:
|
|
cmd->rx_cmd_sz = 0;
|
|
break;
|
|
case CMD_PAGE_PROGRAM:
|
|
cmd->rx_cmd_sz = cmd->rx_data_sz = 0;
|
|
break;
|
|
}
|
|
|
|
mtk_spi_chip_activate(sc);
|
|
|
|
if (cmd->tx_cmd_sz + cmd->rx_cmd_sz) {
|
|
buf = (uint8_t *)(cmd->rx_cmd);
|
|
tx_buf = (uint8_t *)(cmd->tx_cmd);
|
|
sz = cmd->tx_cmd_sz + cmd->rx_cmd_sz;
|
|
|
|
for (i = 0; i < sz; i++) {
|
|
if(i < cmd->tx_cmd_sz) {
|
|
byte = tx_buf[i];
|
|
error = mtk_spi_txrx(sc, &byte,
|
|
MTK_SPI_WRITE);
|
|
if (error)
|
|
goto mtk_spi_transfer_fail;
|
|
continue;
|
|
}
|
|
error = mtk_spi_txrx(sc, &byte,
|
|
MTK_SPI_READ);
|
|
if (error)
|
|
goto mtk_spi_transfer_fail;
|
|
buf[i] = byte;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Transfer/Receive data
|
|
*/
|
|
|
|
if (cmd->tx_data_sz + cmd->rx_data_sz) {
|
|
write = (cmd->tx_data_sz > 0)?1:0;
|
|
buf = (uint8_t *)(write ? cmd->tx_data : cmd->rx_data);
|
|
sz = write ? cmd->tx_data_sz : cmd->rx_data_sz;
|
|
|
|
for (i = 0; i < sz; i++) {
|
|
byte = buf[i];
|
|
error = mtk_spi_txrx(sc, &byte,
|
|
write ? MTK_SPI_WRITE : MTK_SPI_READ);
|
|
if (error)
|
|
goto mtk_spi_transfer_fail;
|
|
buf[i] = byte;
|
|
}
|
|
}
|
|
mtk_spi_transfer_fail:
|
|
mtk_spi_chip_deactivate(sc);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static phandle_t
|
|
mtk_spi_get_node(device_t bus, device_t dev)
|
|
{
|
|
|
|
/* We only have one child, the SPI bus, which needs our own node. */
|
|
return (ofw_bus_get_node(bus));
|
|
}
|
|
|
|
static device_method_t mtk_spi_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, mtk_spi_probe),
|
|
DEVMETHOD(device_attach, mtk_spi_attach),
|
|
DEVMETHOD(device_detach, mtk_spi_detach),
|
|
|
|
DEVMETHOD(spibus_transfer, mtk_spi_transfer),
|
|
|
|
/* ofw_bus interface */
|
|
DEVMETHOD(ofw_bus_get_node, mtk_spi_get_node),
|
|
|
|
DEVMETHOD_END
|
|
};
|
|
|
|
static driver_t mtk_spi_driver = {
|
|
.name = "spi",
|
|
.methods = mtk_spi_methods,
|
|
.size = sizeof(struct mtk_spi_softc),
|
|
};
|
|
|
|
static devclass_t mtk_spi_devclass;
|
|
|
|
DRIVER_MODULE(mtk_spi_v2, simplebus, mtk_spi_driver, mtk_spi_devclass, 0, 0);
|