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Add a driver for flash memory that implements to the Common Flash

Browse Source 
Memory Interface (CFI). The flash memory can be read and written
to through /dev/cfi# and an ioctl() exists so processes can read
the query information.
The driver supports the AMD and Intel command set, though only
the AMD command has been tested.

Obtained from:	Juniper Networks, Inc.
This commit is contained in:
Marcel Moolenaar 2008-10-25 06:18:12 +00:00
parent 08077f589c
commit e00251b7ed
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=184251
8 changed files with 1023 additions and 0 deletions
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2
sys/conf/files
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@ -532,6 +532,8 @@ dev/buslogic/bt_pci.c optional bt pci
dev/cardbus/cardbus.c optional cardbus
dev/cardbus/cardbus_cis.c optional cardbus
dev/cardbus/cardbus_device.c optional cardbus
dev/cfi/cfi_core.c optional cfi
dev/cfi/cfi_dev.c optional cfi
dev/ciss/ciss.c optional ciss
dev/cm/smc90cx6.c optional cm
dev/cmx/cmx.c optional cmx

1
sys/conf/files.powerpc
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@ -28,6 +28,7 @@ opt_ah.h optional ath_hal \
crypto/blowfish/bf_enc.c optional crypto | ipsec
crypto/des/des_enc.c optional crypto | ipsec | netsmb
dev/bm/if_bm.c optional bm powermac
dev/cfi/cfi_bus_lbc.c optional cfi
dev/fb/fb.c optional sc
dev/hwpmc/hwpmc_powerpc.c optional hwpmc
dev/kbd/kbd.c optional sc

83
sys/dev/cfi/cfi_bus_lbc.c Normal file
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@ -0,0 +1,83 @@
/*-
* Copyright (c) 2007, Juniper Networks, Inc.
* 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.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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/conf.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <machine/bus.h>
#include <dev/cfi/cfi_var.h>
#include <powerpc/mpc85xx/lbc.h>
static int cfi_lbc_probe(device_t);
static device_method_t cfi_lbc_methods[] = {
/* device interface */
DEVMETHOD(device_probe, cfi_lbc_probe),
DEVMETHOD(device_attach, cfi_attach),
DEVMETHOD(device_detach, cfi_detach),
{0, 0}
};
static driver_t cfi_lbc_driver = {
cfi_driver_name,
cfi_lbc_methods,
sizeof(struct cfi_softc),
};
DRIVER_MODULE (cfi, lbc, cfi_lbc_driver, cfi_devclass, 0, 0);
static int
cfi_lbc_probe(device_t dev)
{
uintptr_t devtype;
int error;
error = BUS_READ_IVAR(device_get_parent(dev), dev, LBC_IVAR_DEVTYPE,
&devtype);
if (error)
return (error);
if (devtype != LBC_DEVTYPE_CFI)
return (EINVAL);
return (cfi_probe(dev));
}

419
sys/dev/cfi/cfi_core.c Normal file
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@ -0,0 +1,419 @@
/*-
* Copyright (c) 2007, Juniper Networks, Inc.
* 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.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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/conf.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <machine/bus.h>
#include <dev/cfi/cfi_reg.h>
#include <dev/cfi/cfi_var.h>
extern struct cdevsw cfi_cdevsw;
char cfi_driver_name[] = "cfi";
devclass_t cfi_devclass;
uint32_t
cfi_read(struct cfi_softc *sc, u_int ofs)
{
uint32_t val;
ofs &= ~(sc->sc_width - 1);
switch (sc->sc_width) {
case 1:
val = bus_space_read_1(sc->sc_tag, sc->sc_handle, ofs);
break;
case 2:
val = bus_space_read_2(sc->sc_tag, sc->sc_handle, ofs);
break;
case 4:
val = bus_space_read_4(sc->sc_tag, sc->sc_handle, ofs);
break;
default:
val = ~0;
break;
}
return (val);
}
static void
cfi_write(struct cfi_softc *sc, u_int ofs, u_int val)
{
ofs &= ~(sc->sc_width - 1);
switch (sc->sc_width) {
case 1:
bus_space_write_1(sc->sc_tag, sc->sc_handle, ofs, val);
break;
case 2:
bus_space_write_2(sc->sc_tag, sc->sc_handle, ofs, val);
break;
case 4:
bus_space_write_4(sc->sc_tag, sc->sc_handle, ofs, val);
break;
}
}
uint8_t
cfi_read_qry(struct cfi_softc *sc, u_int ofs)
{
uint8_t val;
cfi_write(sc, CFI_QRY_CMD_ADDR * sc->sc_width, CFI_QRY_CMD_DATA);
val = cfi_read(sc, ofs * sc->sc_width);
cfi_write(sc, 0, CFI_BCS_READ_ARRAY);
return (val);
}
static void
cfi_amd_write(struct cfi_softc *sc, u_int ofs, u_int addr, u_int data)
{
cfi_write(sc, ofs + AMD_ADDR_START, CFI_AMD_UNLOCK);
cfi_write(sc, ofs + AMD_ADDR_ACK, CFI_AMD_UNLOCK_ACK);
cfi_write(sc, ofs + addr, data);
}
static char *
cfi_fmtsize(uint32_t sz)
{
static char buf[8];
static const char *sfx[] = { "", "K", "M", "G" };
int sfxidx;
sfxidx = 0;
while (sfxidx < 3 && sz > 1023) {
sz /= 1024;
sfxidx++;
}
sprintf(buf, "%u%sB", sz, sfx[sfxidx]);
return (buf);
}
int
cfi_probe(device_t dev)
{
char desc[80];
struct cfi_softc *sc;
char *vend_str;
int error;
uint16_t iface, vend;
sc = device_get_softc(dev);
sc->sc_dev = dev;
sc->sc_rid = 0;
sc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->sc_rid,
RF_ACTIVE);
if (sc->sc_res == NULL)
return (ENXIO);
sc->sc_tag = rman_get_bustag(sc->sc_res);
sc->sc_handle = rman_get_bushandle(sc->sc_res);
sc->sc_width = 1;
while (sc->sc_width <= 4) {
if (cfi_read_qry(sc, CFI_QRY_IDENT) == 'Q')
break;
sc->sc_width <<= 1;
}
if (sc->sc_width > 4) {
error = ENXIO;
goto out;
}
/* We got a Q. Check if we also have the R and the Y. */
if (cfi_read_qry(sc, CFI_QRY_IDENT + 1) != 'R' ||
cfi_read_qry(sc, CFI_QRY_IDENT + 2) != 'Y') {
error = ENXIO;
goto out;
}
/* Get the vendor and command set. */
vend = cfi_read_qry(sc, CFI_QRY_VEND) |
(cfi_read_qry(sc, CFI_QRY_VEND + 1) << 8);
sc->sc_cmdset = vend;
switch (vend) {
case CFI_VEND_AMD_ECS:
case CFI_VEND_AMD_SCS:
vend_str = "AMD/Fujitsu";
break;
case CFI_VEND_INTEL_ECS:
vend_str = "Intel/Sharp";
break;
case CFI_VEND_INTEL_SCS:
vend_str = "Intel";
break;
case CFI_VEND_MITSUBISHI_ECS:
case CFI_VEND_MITSUBISHI_SCS:
vend_str = "Mitsubishi";
break;
default:
vend_str = "Unknown vendor";
break;
}
/* Get the device size. */
sc->sc_size = 1U << cfi_read_qry(sc, CFI_QRY_SIZE);
/* Sanity-check the I/F */
iface = cfi_read_qry(sc, CFI_QRY_IFACE) |
(cfi_read_qry(sc, CFI_QRY_IFACE + 1) << 8);
/*
* Adding 1 to iface will give us a bit-wise "switch"
* that allows us to test for the interface width by
* testing a single bit.
*/
iface++;
error = (iface & sc->sc_width) ? 0 : EINVAL;
if (error)
goto out;
snprintf(desc, sizeof(desc), "%s - %s", vend_str,
cfi_fmtsize(sc->sc_size));
device_set_desc_copy(dev, desc);
out:
bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_rid, sc->sc_res);
return (error);
}
int
cfi_attach(device_t dev)
{
struct cfi_softc *sc;
u_int blksz, blocks;
u_int r, u;
sc = device_get_softc(dev);
sc->sc_dev = dev;
sc->sc_rid = 0;
sc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->sc_rid,
RF_ACTIVE);
if (sc->sc_res == NULL)
return (ENXIO);
sc->sc_tag = rman_get_bustag(sc->sc_res);
sc->sc_handle = rman_get_bushandle(sc->sc_res);
/* Get time-out values for erase and write. */
sc->sc_write_timeout = 1 << cfi_read_qry(sc, CFI_QRY_TTO_WRITE);
sc->sc_erase_timeout = 1 << cfi_read_qry(sc, CFI_QRY_TTO_ERASE);
sc->sc_write_timeout *= 1 << cfi_read_qry(sc, CFI_QRY_MTO_WRITE);
sc->sc_erase_timeout *= 1 << cfi_read_qry(sc, CFI_QRY_MTO_ERASE);
/* Get erase regions. */
sc->sc_regions = cfi_read_qry(sc, CFI_QRY_NREGIONS);
sc->sc_region = malloc(sc->sc_regions * sizeof(struct cfi_region),
M_TEMP, M_WAITOK | M_ZERO);
for (r = 0; r < sc->sc_regions; r++) {
blocks = cfi_read_qry(sc, CFI_QRY_REGION(r)) |
(cfi_read_qry(sc, CFI_QRY_REGION(r) + 1) << 8);
sc->sc_region[r].r_blocks = blocks + 1;
blksz = cfi_read_qry(sc, CFI_QRY_REGION(r) + 2) |
(cfi_read_qry(sc, CFI_QRY_REGION(r) + 3) << 8);
sc->sc_region[r].r_blksz = (blksz == 0) ? 128 :
blksz * 256;
}
/* Reset the device to a default state. */
cfi_write(sc, 0, CFI_BCS_CLEAR_STATUS);
if (bootverbose) {
device_printf(dev, "[");
for (r = 0; r < sc->sc_regions; r++) {
printf("%ux%s%s", sc->sc_region[r].r_blocks,
cfi_fmtsize(sc->sc_region[r].r_blksz),
(r == sc->sc_regions - 1) ? "]\n" : ",");
}
}
u = device_get_unit(dev);
sc->sc_nod = make_dev(&cfi_cdevsw, u, UID_ROOT, GID_WHEEL, 0600,
"%s%u", cfi_driver_name, u);
sc->sc_nod->si_drv1 = sc;
return (0);
}
int
cfi_detach(device_t dev)
{
struct cfi_softc *sc;
sc = device_get_softc(dev);
destroy_dev(sc->sc_nod);
free(sc->sc_region, M_TEMP);
bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_rid, sc->sc_res);
return (0);
}
static int
cfi_wait_ready(struct cfi_softc *sc, u_int timeout)
{
int done, error;
uint32_t st0, st;
done = 0;
error = 0;
timeout *= 10;
while (!done && !error && timeout) {
DELAY(100);
timeout--;
switch (sc->sc_cmdset) {
case CFI_VEND_INTEL_ECS:
case CFI_VEND_INTEL_SCS:
st = cfi_read(sc, sc->sc_wrofs);
done = (st & 0x80);
if (done) {
if (st & 0x02)
error = EPERM;
else if (st & 0x10)
error = EIO;
else if (st & 0x20)
error = ENXIO;
}
break;
case CFI_VEND_AMD_SCS:
case CFI_VEND_AMD_ECS:
st0 = cfi_read(sc, sc->sc_wrofs);
st = cfi_read(sc, sc->sc_wrofs);
done = ((st & 0x40) == (st0 & 0x40)) ? 1 : 0;
break;
}
}
if (!done && !error)
error = ETIMEDOUT;
if (error)
printf("\nerror=%d\n", error);
return (error);
}
int
cfi_write_block(struct cfi_softc *sc)
{
union {
uint8_t *x8;
uint16_t *x16;
uint32_t *x32;
} ptr;
register_t intr;
int error, i;
/* Erase the block. */
switch (sc->sc_cmdset) {
case CFI_VEND_INTEL_ECS:
case CFI_VEND_INTEL_SCS:
cfi_write(sc, sc->sc_wrofs, CFI_BCS_BLOCK_ERASE);
cfi_write(sc, sc->sc_wrofs, CFI_BCS_CONFIRM);
break;
case CFI_VEND_AMD_SCS:
case CFI_VEND_AMD_ECS:
cfi_amd_write(sc, sc->sc_wrofs, AMD_ADDR_START,
CFI_AMD_ERASE_SECTOR);
cfi_amd_write(sc, sc->sc_wrofs, 0, CFI_AMD_BLOCK_ERASE);
break;
default:
/* Better safe than sorry... */
return (ENODEV);
}
error = cfi_wait_ready(sc, sc->sc_erase_timeout);
if (error)
goto out;
/* Write the block. */
ptr.x8 = sc->sc_wrbuf;
for (i = 0; i < sc->sc_wrbufsz; i += sc->sc_width) {
/*
* Make sure the command to start a write and the
* actual write happens back-to-back without any
* excessive delays.
*/
intr = intr_disable();
switch (sc->sc_cmdset) {
case CFI_VEND_INTEL_ECS:
case CFI_VEND_INTEL_SCS:
cfi_write(sc, sc->sc_wrofs + i, CFI_BCS_PROGRAM);
break;
case CFI_VEND_AMD_SCS:
case CFI_VEND_AMD_ECS:
cfi_amd_write(sc, 0, AMD_ADDR_START, CFI_AMD_PROGRAM);
break;
}
switch (sc->sc_width) {
case 1:
bus_space_write_1(sc->sc_tag, sc->sc_handle,
sc->sc_wrofs + i, *(ptr.x8)++);
break;
case 2:
bus_space_write_2(sc->sc_tag, sc->sc_handle,
sc->sc_wrofs + i, *(ptr.x16)++);
break;
case 4:
bus_space_write_4(sc->sc_tag, sc->sc_handle,
sc->sc_wrofs + i, *(ptr.x32)++);
break;
}
intr_restore(intr);
error = cfi_wait_ready(sc, sc->sc_write_timeout);
if (error)
goto out;
}
/* error is 0. */
out:
cfi_write(sc, 0, CFI_BCS_READ_ARRAY);
return (error);
}

277
sys/dev/cfi/cfi_dev.c Normal file
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@ -0,0 +1,277 @@
/*-
* Copyright (c) 2007, Juniper Networks, Inc.
* 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.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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/conf.h>
#include <sys/ioccom.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <sys/uio.h>
#include <sys/cfictl.h>
#include <machine/atomic.h>
#include <machine/bus.h>
#include <dev/cfi/cfi_var.h>
static d_open_t cfi_devopen;
static d_close_t cfi_devclose;
static d_read_t cfi_devread;
static d_write_t cfi_devwrite;
static d_ioctl_t cfi_devioctl;
struct cdevsw cfi_cdevsw = {
.d_version = D_VERSION,
.d_flags = 0,
.d_name = cfi_driver_name,
.d_open = cfi_devopen,
.d_close = cfi_devclose,
.d_read = cfi_devread,
.d_write = cfi_devwrite,
.d_ioctl = cfi_devioctl,
};
/*
* Begin writing into a new block/sector. We read the sector into
* memory and keep updating that, until we move into another sector
* or the process stops writing. At that time we write the whole
* sector to flash (see cfi_block_finish).
*/
static int
cfi_block_start(struct cfi_softc *sc, u_int ofs)
{
union {
uint8_t *x8;
uint16_t *x16;
uint32_t *x32;
} ptr;
u_int rofs, rsz;
uint32_t val;
int r;
rofs = 0;
for (r = 0; r < sc->sc_regions; r++) {
rsz = sc->sc_region[r].r_blocks * sc->sc_region[r].r_blksz;
if (ofs < rofs + rsz)
break;
rofs += rsz;
}
if (r == sc->sc_regions)
return (EFAULT);
sc->sc_wrbufsz = sc->sc_region[r].r_blksz;
sc->sc_wrbuf = malloc(sc->sc_wrbufsz, M_TEMP, M_WAITOK);
sc->sc_wrofs = ofs - (ofs - rofs) % sc->sc_wrbufsz;
/* Read the block from flash for byte-serving. */
ptr.x8 = sc->sc_wrbuf;
for (r = 0; r < sc->sc_wrbufsz; r += sc->sc_width) {
val = cfi_read(sc, sc->sc_wrofs + r);
switch (sc->sc_width) {
case 1:
*(ptr.x8)++ = val;
break;
case 2:
*(ptr.x16)++ = val;
break;
case 4:
*(ptr.x32)++ = val;
break;
}
}
sc->sc_writing = 1;
return (0);
}
/*
* Finish updating the current block/sector by writing the compound
* set of changes to the flash.
*/
static int
cfi_block_finish(struct cfi_softc *sc)
{
int error;
error = cfi_write_block(sc);
free(sc->sc_wrbuf, M_TEMP);
sc->sc_wrbuf = NULL;
sc->sc_wrbufsz = 0;
sc->sc_wrofs = 0;
sc->sc_writing = 0;
return (error);
}
static int
cfi_devopen(struct cdev *dev, int oflags, int devtype, struct thread *td)
{
struct cfi_softc *sc;
sc = dev->si_drv1;
/* We allow only 1 open. */
if (!atomic_cmpset_acq_ptr(&sc->sc_opened, NULL, td->td_proc))
return (EBUSY);
return (0);
}
static int
cfi_devclose(struct cdev *dev, int fflag, int devtype, struct thread *td)
{
struct cfi_softc *sc;
int error;
sc = dev->si_drv1;
/* Sanity. Not really necessary. */
if (sc->sc_opened != td->td_proc)
return (ENXIO);
error = (sc->sc_writing) ? cfi_block_finish(sc) : 0;
sc->sc_opened = NULL;
return (error);
}
static int
cfi_devread(struct cdev *dev, struct uio *uio, int ioflag)
{
union {
uint8_t x8[4];
uint16_t x16[2];
uint32_t x32[1];
} buf;
struct cfi_softc *sc;
u_int ofs;
uint32_t val;
int error;
sc = dev->si_drv1;
error = (sc->sc_writing) ? cfi_block_finish(sc) : 0;
if (!error)
error = (uio->uio_offset > sc->sc_size) ? EIO : 0;
while (error == 0 && uio->uio_resid > 0 &&
uio->uio_offset < sc->sc_size) {
ofs = uio->uio_offset;
val = cfi_read(sc, ofs);
switch (sc->sc_width) {
case 1:
buf.x8[0] = val;
break;
case 2:
buf.x16[0] = val;
break;
case 4:
buf.x32[0] = val;
break;
}
ofs &= sc->sc_width - 1;
error = uiomove(buf.x8 + ofs,
MIN(uio->uio_resid, sc->sc_width - ofs), uio);
}
return (error);
}
static int
cfi_devwrite(struct cdev *dev, struct uio *uio, int ioflag)
{
struct cfi_softc *sc;
u_int ofs, top;
int error;
sc = dev->si_drv1;
error = (uio->uio_offset > sc->sc_size) ? EIO : 0;
while (error == 0 && uio->uio_resid > 0 &&
uio->uio_offset < sc->sc_size) {
ofs = uio->uio_offset;
/*
* Finish the current block if we're about to write
* to a different block.
*/
if (sc->sc_writing) {
top = sc->sc_wrofs + sc->sc_wrbufsz;
if (ofs < sc->sc_wrofs || ofs >= top)
cfi_block_finish(sc);
}
/* Start writing to a (new) block if applicable. */
if (!sc->sc_writing) {
error = cfi_block_start(sc, uio->uio_offset);
if (error)
break;
}
top = sc->sc_wrofs + sc->sc_wrbufsz;
error = uiomove(sc->sc_wrbuf + ofs - sc->sc_wrofs,
MIN(top - ofs, uio->uio_resid), uio);
}
return (error);
}
static int
cfi_devioctl(struct cdev *dev, u_long cmd, caddr_t data, int fflag,
struct thread *td)
{
struct cfi_softc *sc;
struct cfiocqry *rq;
int error;
u_char val;
if (cmd != CFIOCQRY)
return (ENOIOCTL);
sc = dev->si_drv1;
error = (sc->sc_writing) ? cfi_block_finish(sc) : 0;
if (error)
return (error);
rq = (struct cfiocqry *)data;
if (rq->offset >= sc->sc_size / sc->sc_width)
return (ESPIPE);
if (rq->offset + rq->count > sc->sc_size / sc->sc_width)
return (ENOSPC);
while (!error && rq->count--) {
val = cfi_read_qry(sc, rq->offset++);
error = copyout(&val, rq->buffer++, 1);
}
return (error);
}

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/*-
* Copyright (c) 2007, Juniper Networks, Inc.
* 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.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*
* $FreeBSD$
*/
#ifndef _DEV_CFI_REG_H_
#define _DEV_CFI_REG_H_
struct cfi_qry {
u_char reserved[16];
u_char ident[3]; /* "QRY" */
u_char pri_vend[2];
u_char pri_vend_eqt[2];
u_char alt_vend[2];
u_char alt_vend_eqt[2];
/* System Interface Information. */
u_char min_vcc;
u_char max_vcc;
u_char min_vpp;
u_char max_vpp;
u_char tto_byte_write; /* 2**n milliseconds. */
u_char tto_buf_write; /* 2**n milliseconds. */
u_char tto_block_erase; /* 2**n milliseconds. */
u_char tto_chip_erase; /* 2**n milliseconds. */
u_char mto_byte_write; /* 2**n times typical t/o. */
u_char mto_buf_write; /* 2**n times typical t/o. */
u_char mto_block_erase; /* 2**n times typical t/o. */
u_char mto_chip_erase; /* 2**n times typical t/o. */
/* Device Geometry Definition. */
u_char size; /* 2**n bytes. */
u_char iface[2];
u_char max_buf_write_size[2]; /* 2**n. */
u_char nregions; /* Number of erase regions. */
u_char region[4]; /* Single entry. */
/* Additional entries follow. */
/* Primary Vendor-specific Extended Query table follows. */
/* Alternate Vendor-specific Extended Query table follows. */
};
#define CFI_QRY_CMD_ADDR 0x55
#define CFI_QRY_CMD_DATA 0x98
#define CFI_QRY_IDENT offsetof(struct cfi_qry, ident)
#define CFI_QRY_VEND offsetof(struct cfi_qry, pri_vend)
#define CFI_QRY_TTO_WRITE offsetof(struct cfi_qry, tto_byte_write)
#define CFI_QRY_TTO_ERASE offsetof(struct cfi_qry, tto_block_erase)
#define CFI_QRY_MTO_WRITE offsetof(struct cfi_qry, mto_byte_write)
#define CFI_QRY_MTO_ERASE offsetof(struct cfi_qry, mto_block_erase)
#define CFI_QRY_SIZE offsetof(struct cfi_qry, size)
#define CFI_QRY_IFACE offsetof(struct cfi_qry, iface)
#define CFI_QRY_NREGIONS offsetof(struct cfi_qry, nregions)
#define CFI_QRY_REGION0 offsetof(struct cfi_qry, region)
#define CFI_QRY_REGION(x) (CFI_QRY_REGION0 + (x) * 4)
#define CFI_VEND_NONE 0x0000
#define CFI_VEND_INTEL_ECS 0x0001
#define CFI_VEND_AMD_SCS 0x0002
#define CFI_VEND_INTEL_SCS 0x0003
#define CFI_VEND_AMD_ECS 0x0004
#define CFI_VEND_MITSUBISHI_SCS 0x0100
#define CFI_VEND_MITSUBISHI_ECS 0x0101
#define CFI_IFACE_X8 0x0000
#define CFI_IFACE_X16 0x0001
#define CFI_IFACE_X8X16 0x0002
#define CFI_IFACE_X32 0x0003
#define CFI_IFACE_X16X32 0x0005
/* Standard Command Set (aka Basic Command Set) */
#define CFI_BCS_BLOCK_ERASE 0x20
#define CFI_BCS_PROGRAM 0x40
#define CFI_BCS_CLEAR_STATUS 0x50
#define CFI_BCS_READ_STATUS 0x70
#define CFI_BCS_ERASE_SUSPEND 0xb0
#define CFI_BCS_ERASE_RESUME 0xd0 /* Equals CONFIRM */
#define CFI_BCS_CONFIRM 0xd0
#define CFI_BCS_READ_ARRAY 0xff
/* AMD commands. */
#define CFI_AMD_BLOCK_ERASE 0x30
#define CFI_AMD_UNLOCK_ACK 0x55
#define CFI_AMD_ERASE_SECTOR 0x80
#define CFI_AMD_PROGRAM 0xa0
#define CFI_AMD_UNLOCK 0xaa
#define AMD_ADDR_START 0xaaa
#define AMD_ADDR_ACK 0x555
#endif /* _DEV_CFI_REG_H_ */

77
sys/dev/cfi/cfi_var.h Normal file
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/*-
* Copyright (c) 2007, Juniper Networks, Inc.
* 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.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*
* $FreeBSD$
*/
#ifndef _DEV_CFI_VAR_H_
#define _DEV_CFI_VAR_H_
struct cfi_region {
u_int r_blocks;
u_int r_blksz;
};
struct cfi_softc {
device_t sc_dev;
struct resource *sc_res;
bus_space_handle_t sc_handle;
bus_space_tag_t sc_tag;
int sc_rid;
u_int sc_size; /* Flash size. */
u_int sc_width; /* Interface width. */
u_int sc_regions; /* Erase regions. */
struct cfi_region *sc_region; /* Array of region info. */
u_int sc_cmdset;
u_int sc_erase_timeout;
u_int sc_write_timeout;
struct cdev *sc_nod;
struct proc *sc_opened; /* Process that has us opened. */
u_char *sc_wrbuf;
u_int sc_wrbufsz;
u_int sc_wrofs;
u_int sc_writing;
};
extern char cfi_driver_name[];
extern devclass_t cfi_devclass;
int cfi_probe(device_t);
int cfi_attach(device_t);
int cfi_detach(device_t);
uint32_t cfi_read(struct cfi_softc *, u_int);
uint8_t cfi_read_qry(struct cfi_softc *, u_int);
int cfi_write_block(struct cfi_softc *);
#endif /* _DEV_CFI_VAR_H_ */

47
sys/sys/cfictl.h Normal file
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/*-
* Copyright (c) 2007, Juniper Networks, Inc.
* 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.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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 Bill Paul OR THE VOICES IN HIS HEAD
* 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.
*
* $FreeBSD$
*/
#ifndef _SYS_CFICTL_H_
#define _SYS_CFICTL_H_
/*
* Allow reading of the CFI query structure.
*/
struct cfiocqry {
unsigned long offset;
unsigned long count;
u_char *buffer;
};
#define CFIOCQRY _IOWR('q', 0, struct cfiocqry)
#endif /* _SYS_CFICTL_H_ */