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Implement a driver for the PowerPC-base RouterBoard (RB333/600/800/1100)

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Summary:
This has been tested on the RB800, but should work on the RB333, RB600, and
RB1100 as well.

It's currently missing ECC support, but read and write are complete.

Reviewers: imp

Reviewed By: imp

Subscribers: imp

Differential Revision: https://reviews.freebsd.org/D2223
This commit is contained in:
Justin Hibbits 2015-05-04 20:36:00 +00:00
parent b208a147b9
commit 98be38e7fb
2 changed files with 276 additions and 0 deletions
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1
sys/conf/files.powerpc
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@ -43,6 +43,7 @@ dev/iicbus/ds1775.c optional ds1775 powermac
dev/iicbus/max6690.c optional max6690 powermac
dev/kbd/kbd.c optional sc | vt
dev/nand/nfc_fsl.c optional nand mpc85xx
dev/nand/nfc_rb.c optional nand mpc85xx
# ofw can be either aim or fdt: fdt case handled in files. aim only powerpc specific.
dev/ofw/openfirm.c optional aim
dev/ofw/openfirmio.c optional aim

275
sys/dev/nand/nfc_rb.c Normal file
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@ -0,0 +1,275 @@
/*-
* Copyright (C) 2015 Justin Hibbits
* 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, 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.
*/
/* RouterBoard 600/800 NAND controller driver. */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/rman.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/time.h>
#include <machine/bus.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/nand/nand.h>
#include <dev/nand/nandbus.h>
#include "nfc_if.h"
#include "gpio_if.h"
#define RB_NAND_DATA (0x00)
struct rb_nand_softc {
struct nand_softc nand_dev;
struct resource *sc_mem;
int rid;
device_t sc_gpio;
uint32_t sc_rdy_pin;
uint32_t sc_nce_pin;
uint32_t sc_cle_pin;
uint32_t sc_ale_pin;
};
static int rb_nand_attach(device_t);
static int rb_nand_probe(device_t);
static int rb_nand_send_command(device_t, uint8_t);
static int rb_nand_send_address(device_t, uint8_t);
static uint8_t rb_nand_read_byte(device_t);
static void rb_nand_read_buf(device_t, void *, uint32_t);
static void rb_nand_write_buf(device_t, void *, uint32_t);
static int rb_nand_select_cs(device_t, uint8_t);
static int rb_nand_read_rnb(device_t);
static device_method_t rb_nand_methods[] = {
DEVMETHOD(device_probe, rb_nand_probe),
DEVMETHOD(device_attach, rb_nand_attach),
DEVMETHOD(nfc_send_command, rb_nand_send_command),
DEVMETHOD(nfc_send_address, rb_nand_send_address),
DEVMETHOD(nfc_read_byte, rb_nand_read_byte),
DEVMETHOD(nfc_read_buf, rb_nand_read_buf),
DEVMETHOD(nfc_write_buf, rb_nand_write_buf),
DEVMETHOD(nfc_select_cs, rb_nand_select_cs),
DEVMETHOD(nfc_read_rnb, rb_nand_read_rnb),
{ 0, 0 },
};
static driver_t rb_nand_driver = {
"nand",
rb_nand_methods,
sizeof(struct rb_nand_softc),
};
static devclass_t rb_nand_devclass;
DRIVER_MODULE(rb_nand, ofwbus, rb_nand_driver, rb_nand_devclass, 0, 0);
#if 0
static const struct nand_ecc_data rb_ecc = {
.eccsize = 6,
.eccmode = NAND_ECC_SOFT,
.eccbytes = 6,
.eccpositions = { 8, 9, 10, 13, 14, 15 },
};
#endif
static int
rb_nand_probe(device_t dev)
{
const char *device_type;
device_type = ofw_bus_get_type(dev);
if (!device_type || strcmp(device_type, "rb,nand"))
return (ENXIO);
device_set_desc(dev, "RouterBoard 333/600/800 NAND controller");
return (BUS_PROBE_DEFAULT);
}
static int
rb_nand_attach(device_t dev)
{
struct rb_nand_softc *sc;
phandle_t node;
uint32_t ale[2],cle[2],nce[2],rdy[2];
int err;
sc = device_get_softc(dev);
node = ofw_bus_get_node(dev);
if (OF_getprop(node, "ale", ale, sizeof(ale)) <= 0) {
return (ENXIO);
}
if (OF_getprop(node, "cle", cle, sizeof(cle)) <= 0) {
return (ENXIO);
}
if (OF_getprop(node, "nce", nce, sizeof(nce)) <= 0) {
return (ENXIO);
}
if (OF_getprop(node, "rdy", rdy, sizeof(rdy)) <= 0) {
return (ENXIO);
}
if (ale[0] != cle[0] || ale[0] != nce[0] || ale[0] != rdy[0]) {
device_printf(dev, "GPIO handles for signals must match.\n");
return (ENXIO);
}
sc->sc_ale_pin = ale[1];
sc->sc_cle_pin = cle[1];
sc->sc_nce_pin = nce[1];
sc->sc_rdy_pin = rdy[1];
sc->sc_gpio = OF_device_from_xref(ale[0]);
if (sc->sc_gpio == NULL) {
device_printf(dev, "No GPIO resource found!\n");
return (ENXIO);
}
sc->sc_mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
RF_ACTIVE);
if (sc->sc_mem == NULL) {
device_printf(dev, "could not allocate resources!\n");
return (ENXIO);
}
nand_init(&sc->nand_dev, dev, NAND_ECC_SOFT, 0, 0, NULL, NULL);
err = nandbus_create(dev);
return (err);
}
static int
rb_nand_send_command(device_t dev, uint8_t command)
{
struct rb_nand_softc *sc;
nand_debug(NDBG_DRV,"rb_nand: send command %x", command);
sc = device_get_softc(dev);
GPIO_PIN_SET(sc->sc_gpio, sc->sc_cle_pin, 1);
GPIO_PIN_SET(sc->sc_gpio, sc->sc_ale_pin, 0);
GPIO_PIN_SET(sc->sc_gpio, sc->sc_nce_pin, 0);
bus_write_1(sc->sc_mem, RB_NAND_DATA, command);
GPIO_PIN_SET(sc->sc_gpio, sc->sc_cle_pin, 0);
return (0);
}
static int
rb_nand_send_address(device_t dev, uint8_t addr)
{
struct rb_nand_softc *sc;
nand_debug(NDBG_DRV,"rb_nand: send address %x", addr);
sc = device_get_softc(dev);
GPIO_PIN_SET(sc->sc_gpio, sc->sc_cle_pin, 0);
GPIO_PIN_SET(sc->sc_gpio, sc->sc_ale_pin, 1);
GPIO_PIN_SET(sc->sc_gpio, sc->sc_nce_pin, 0);
bus_write_1(sc->sc_mem, RB_NAND_DATA, addr);
GPIO_PIN_SET(sc->sc_gpio, sc->sc_ale_pin, 0);
return (0);
}
static uint8_t
rb_nand_read_byte(device_t dev)
{
struct rb_nand_softc *sc;
uint8_t data;
sc = device_get_softc(dev);
data = bus_read_1(sc->sc_mem, RB_NAND_DATA);
nand_debug(NDBG_DRV,"rb_nand: read %x", data);
return (data);
}
static void
rb_nand_read_buf(device_t dev, void* buf, uint32_t len)
{
struct rb_nand_softc *sc;
sc = device_get_softc(dev);
bus_read_region_1(sc->sc_mem, RB_NAND_DATA, buf, len);
}
static void
rb_nand_write_buf(device_t dev, void* buf, uint32_t len)
{
struct rb_nand_softc *sc;
int i;
uint8_t *b = (uint8_t*)buf;
sc = device_get_softc(dev);
for (i = 0; i < len; i++) {
#ifdef NAND_DEBUG
if (!(i % 16))
printf("%s", i == 0 ? "rb_nand:\n" : "\n");
printf(" %x", b[i]);
if (i == len - 1)
printf("\n");
#endif
bus_write_1(sc->sc_mem, RB_NAND_DATA, b[i]);
}
}
static int
rb_nand_select_cs(device_t dev, uint8_t cs)
{
if (cs > 0)
return (ENODEV);
return (0);
}
static int
rb_nand_read_rnb(device_t dev)
{
struct rb_nand_softc *sc;
uint32_t rdy_bit;
sc = device_get_softc(dev);
GPIO_PIN_GET(sc->sc_gpio, sc->sc_rdy_pin, &rdy_bit);
return (rdy_bit); /* ready */
}