eed4bd22ad
Most affect comments, very few have user-visible effects.
716 lines
18 KiB
C
716 lines
18 KiB
C
/*-
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* Copyright (C) 2012 Juniper Networks, Inc.
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* Copyright (C) 2009-2012 Semihalf
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* All rights reserved.
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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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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* TODO :
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*
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* -- test support for small pages
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* -- support for reading ONFI parameters
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* -- support for cached and interleaving commands
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* -- proper setting of AL bits in FMR
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <sys/time.h>
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#include <sys/kdb.h>
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#include <machine/bus.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 <powerpc/mpc85xx/lbc.h>
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#include <dev/nand/nand.h>
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#include <dev/nand/nandbus.h>
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#include "nfc_fsl.h"
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#include "nfc_if.h"
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#define LBC_READ(regname) lbc_read_reg(dev, (LBC85XX_ ## regname))
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#define LBC_WRITE(regname, val) lbc_write_reg(dev, (LBC85XX_ ## regname), val)
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enum addr_type {
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ADDR_NONE,
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ADDR_ID,
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ADDR_ROW,
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ADDR_ROWCOL
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};
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struct fsl_nfc_fcm {
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/* Read-only after initialization */
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uint32_t reg_fmr;
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/* To be preserved across "start_command" */
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u_int buf_ofs;
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u_int read_ptr;
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u_int status:1;
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/* Command state -- cleared by "start_command" */
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uint32_t fcm_startzero;
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uint32_t reg_fcr;
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uint32_t reg_fir;
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uint32_t reg_mdr;
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uint32_t reg_fbcr;
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uint32_t reg_fbar;
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uint32_t reg_fpar;
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u_int cmdnr;
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u_int opnr;
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u_int pg_ofs;
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enum addr_type addr_type;
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u_int addr_bytes;
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u_int row_addr;
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u_int column_addr;
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u_int data_fir:8;
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uint32_t fcm_endzero;
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};
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struct fsl_nand_softc {
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struct nand_softc nand_dev;
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device_t dev;
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struct resource *res;
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int rid; /* Resourceid */
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struct lbc_devinfo *dinfo;
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struct fsl_nfc_fcm fcm;
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uint8_t col_cycles;
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uint8_t row_cycles;
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uint16_t pgsz; /* Page size */
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};
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static int fsl_nand_attach(device_t dev);
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static int fsl_nand_probe(device_t dev);
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static int fsl_nand_detach(device_t dev);
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static int fsl_nfc_select_cs(device_t dev, uint8_t cs);
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static int fsl_nfc_read_rnb(device_t dev);
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static int fsl_nfc_send_command(device_t dev, uint8_t command);
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static int fsl_nfc_send_address(device_t dev, uint8_t address);
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static uint8_t fsl_nfc_read_byte(device_t dev);
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static int fsl_nfc_start_command(device_t dev);
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static void fsl_nfc_read_buf(device_t dev, void *buf, uint32_t len);
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static void fsl_nfc_write_buf(device_t dev, void *buf, uint32_t len);
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static device_method_t fsl_nand_methods[] = {
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DEVMETHOD(device_probe, fsl_nand_probe),
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DEVMETHOD(device_attach, fsl_nand_attach),
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DEVMETHOD(device_detach, fsl_nand_detach),
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DEVMETHOD(nfc_select_cs, fsl_nfc_select_cs),
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DEVMETHOD(nfc_read_rnb, fsl_nfc_read_rnb),
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DEVMETHOD(nfc_start_command, fsl_nfc_start_command),
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DEVMETHOD(nfc_send_command, fsl_nfc_send_command),
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DEVMETHOD(nfc_send_address, fsl_nfc_send_address),
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DEVMETHOD(nfc_read_byte, fsl_nfc_read_byte),
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DEVMETHOD(nfc_read_buf, fsl_nfc_read_buf),
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DEVMETHOD(nfc_write_buf, fsl_nfc_write_buf),
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{ 0, 0 },
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};
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static driver_t fsl_nand_driver = {
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"nand",
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fsl_nand_methods,
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sizeof(struct fsl_nand_softc),
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};
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static devclass_t fsl_nand_devclass;
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DRIVER_MODULE(fsl_nand, lbc, fsl_nand_driver, fsl_nand_devclass,
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0, 0);
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static int fsl_nand_build_address(device_t dev, uint32_t page, uint32_t column);
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static int fsl_nand_chip_preprobe(device_t dev, struct nand_id *id);
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#ifdef NAND_DEBUG_TIMING
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static device_t fcm_devs[8];
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#endif
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#define CMD_SHIFT(cmd_num) (24 - ((cmd_num) * 8))
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#define OP_SHIFT(op_num) (28 - ((op_num) * 4))
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#define FSL_LARGE_PAGE_SIZE (2112)
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#define FSL_SMALL_PAGE_SIZE (528)
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static void
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fsl_nand_init_regs(struct fsl_nand_softc *sc)
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{
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uint32_t or_v, br_v;
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device_t dev;
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dev = sc->dev;
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sc->fcm.reg_fmr = (15 << FMR_CWTO_SHIFT);
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/*
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* Setup 4 row cycles and hope that chip ignores superfluous address
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* bytes.
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*/
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sc->fcm.reg_fmr |= (2 << FMR_AL_SHIFT);
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/* Reprogram BR(x) */
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br_v = lbc_read_reg(dev, LBC85XX_BR(sc->dinfo->di_bank));
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br_v &= 0xffff8000;
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br_v |= 1 << 11; /* 8-bit port size */
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br_v |= 0 << 9; /* No ECC checking and generation */
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br_v |= 1 << 5; /* FCM machine */
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br_v |= 1; /* Valid */
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lbc_write_reg(dev, LBC85XX_BR(sc->dinfo->di_bank), br_v);
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/* Reprogram OR(x) */
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or_v = lbc_read_reg(dev, LBC85XX_OR(sc->dinfo->di_bank));
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or_v &= 0xfffffc00;
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or_v |= 0x03AE; /* Default POR timing */
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lbc_write_reg(dev, LBC85XX_OR(sc->dinfo->di_bank), or_v);
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if (or_v & OR_FCM_PAGESIZE) {
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sc->pgsz = FSL_LARGE_PAGE_SIZE;
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sc->col_cycles = 2;
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nand_debug(NDBG_DRV, "%s: large page NAND device at #%d",
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device_get_nameunit(dev), sc->dinfo->di_bank);
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} else {
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sc->pgsz = FSL_SMALL_PAGE_SIZE;
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sc->col_cycles = 1;
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nand_debug(NDBG_DRV, "%s: small page NAND device at #%d",
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device_get_nameunit(dev), sc->dinfo->di_bank);
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}
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}
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static int
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fsl_nand_probe(device_t dev)
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{
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if (!ofw_bus_is_compatible(dev, "fsl,elbc-fcm-nand"))
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return (ENXIO);
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device_set_desc(dev, "Freescale localbus FCM Controller");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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fsl_nand_attach(device_t dev)
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{
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struct fsl_nand_softc *sc;
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struct nand_id id;
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struct nand_params *param;
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uint32_t num_pages;
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sc = device_get_softc(dev);
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sc->dev = dev;
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sc->dinfo = device_get_ivars(dev);
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sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
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RF_ACTIVE);
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if (sc->res == NULL) {
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device_printf(dev, "could not allocate resources!\n");
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return (ENXIO);
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}
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bzero(&sc->fcm, sizeof(sc->fcm));
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/* Init register and check if HW ECC turned on */
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fsl_nand_init_regs(sc);
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/* Chip is probed, so determine number of row address cycles */
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fsl_nand_chip_preprobe(dev, &id);
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param = nand_get_params(&id);
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if (param != NULL) {
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num_pages = (param->chip_size << 20) / param->page_size;
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while(num_pages) {
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sc->row_cycles++;
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num_pages >>= 8;
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}
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sc->fcm.reg_fmr &= ~(FMR_AL);
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sc->fcm.reg_fmr |= (sc->row_cycles - 2) << FMR_AL_SHIFT;
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}
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nand_init(&sc->nand_dev, dev, NAND_ECC_SOFT, 0, 0, NULL, NULL);
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#ifdef NAND_DEBUG_TIMING
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fcm_devs[sc->dinfo->di_bank] = dev;
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#endif
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return (nandbus_create(dev));
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}
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static int
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fsl_nand_detach(device_t dev)
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{
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struct fsl_nand_softc *sc;
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sc = device_get_softc(dev);
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if (sc->res != NULL)
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bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
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return (0);
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}
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static int
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fsl_nfc_select_cs(device_t dev, uint8_t cs)
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{
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// device_printf(dev, "%s(cs=%u)\n", __func__, cs);
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return ((cs > 0) ? EINVAL : 0);
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}
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static int
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fsl_nfc_read_rnb(device_t dev)
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{
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// device_printf(dev, "%s()\n", __func__);
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return (0);
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}
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static int
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fsl_nfc_send_command(device_t dev, uint8_t command)
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{
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struct fsl_nand_softc *sc;
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struct fsl_nfc_fcm *fcm;
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uint8_t fir_op;
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// device_printf(dev, "%s(command=%u)\n", __func__, command);
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sc = device_get_softc(dev);
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fcm = &sc->fcm;
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if (command == NAND_CMD_PROG_END) {
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fcm->reg_fir |= (FIR_OP_WB << OP_SHIFT(fcm->opnr));
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fcm->opnr++;
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}
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fcm->reg_fcr |= command << CMD_SHIFT(fcm->cmdnr);
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fir_op = (fcm->cmdnr == 0) ? FIR_OP_CW0 : FIR_OP_CM(fcm->cmdnr);
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fcm->cmdnr++;
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fcm->reg_fir |= (fir_op << OP_SHIFT(fcm->opnr));
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fcm->opnr++;
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switch (command) {
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case NAND_CMD_READ_ID:
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fcm->data_fir = FIR_OP_RBW;
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fcm->addr_type = ADDR_ID;
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break;
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case NAND_CMD_SMALLOOB:
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fcm->pg_ofs += 256;
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/*FALLTHROUGH*/
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case NAND_CMD_SMALLB:
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fcm->pg_ofs += 256;
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/*FALLTHROUGH*/
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case NAND_CMD_READ: /* NAND_CMD_SMALLA */
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fcm->data_fir = FIR_OP_RBW;
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fcm->addr_type = ADDR_ROWCOL;
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break;
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case NAND_CMD_STATUS:
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fcm->data_fir = FIR_OP_RS;
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fcm->status = 1;
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break;
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case NAND_CMD_ERASE:
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fcm->addr_type = ADDR_ROW;
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break;
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case NAND_CMD_PROG:
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fcm->addr_type = ADDR_ROWCOL;
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break;
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}
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return (0);
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}
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static int
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fsl_nfc_send_address(device_t dev, uint8_t addr)
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{
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struct fsl_nand_softc *sc;
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struct fsl_nfc_fcm *fcm;
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uint32_t addr_bits;
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// device_printf(dev, "%s(address=%u)\n", __func__, addr);
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sc = device_get_softc(dev);
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fcm = &sc->fcm;
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KASSERT(fcm->addr_type != ADDR_NONE,
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("controller doesn't expect address cycle"));
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addr_bits = addr;
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if (fcm->addr_type == ADDR_ID) {
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fcm->reg_fir |= (FIR_OP_UA << OP_SHIFT(fcm->opnr));
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fcm->opnr++;
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fcm->reg_fbcr = 5;
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fcm->reg_fbar = 0;
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fcm->reg_fpar = 0;
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fcm->reg_mdr = addr_bits;
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fcm->buf_ofs = 0;
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fcm->read_ptr = 0;
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return (0);
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}
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if (fcm->addr_type == ADDR_ROW) {
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addr_bits <<= fcm->addr_bytes * 8;
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fcm->row_addr |= addr_bits;
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fcm->addr_bytes++;
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if (fcm->addr_bytes < sc->row_cycles)
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return (0);
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} else {
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if (fcm->addr_bytes < sc->col_cycles) {
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addr_bits <<= fcm->addr_bytes * 8;
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fcm->column_addr |= addr_bits;
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} else {
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addr_bits <<= (fcm->addr_bytes - sc->col_cycles) * 8;
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fcm->row_addr |= addr_bits;
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}
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fcm->addr_bytes++;
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if (fcm->addr_bytes < (sc->row_cycles + sc->col_cycles))
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return (0);
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}
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return (fsl_nand_build_address(dev, fcm->row_addr, fcm->column_addr));
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}
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static int
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fsl_nand_build_address(device_t dev, uint32_t row, uint32_t column)
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{
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struct fsl_nand_softc *sc;
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struct fsl_nfc_fcm *fcm;
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uint32_t byte_count = 0;
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uint32_t block_address = 0;
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uint32_t page_address = 0;
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sc = device_get_softc(dev);
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fcm = &sc->fcm;
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fcm->read_ptr = 0;
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fcm->buf_ofs = 0;
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if (fcm->addr_type == ADDR_ROWCOL) {
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fcm->reg_fir |= (FIR_OP_CA << OP_SHIFT(fcm->opnr));
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fcm->opnr++;
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column += fcm->pg_ofs;
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fcm->pg_ofs = 0;
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page_address |= column;
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if (column != 0) {
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byte_count = sc->pgsz - column;
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fcm->read_ptr = column;
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}
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}
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fcm->reg_fir |= (FIR_OP_PA << OP_SHIFT(fcm->opnr));
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fcm->opnr++;
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if (sc->pgsz == FSL_LARGE_PAGE_SIZE) {
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block_address = row >> 6;
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page_address |= ((row << FPAR_LP_PI_SHIFT) & FPAR_LP_PI);
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fcm->buf_ofs = (row & 1) * 4096;
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} else {
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block_address = row >> 5;
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page_address |= ((row << FPAR_SP_PI_SHIFT) & FPAR_SP_PI);
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fcm->buf_ofs = (row & 7) * 1024;
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}
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fcm->reg_fbcr = byte_count;
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fcm->reg_fbar = block_address;
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fcm->reg_fpar = page_address;
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return (0);
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}
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static int
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fsl_nfc_start_command(device_t dev)
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{
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struct fsl_nand_softc *sc;
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struct fsl_nfc_fcm *fcm;
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uint32_t fmr, ltesr_v;
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int error, timeout;
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// device_printf(dev, "%s()\n", __func__);
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sc = device_get_softc(dev);
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fcm = &sc->fcm;
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fmr = fcm->reg_fmr | FMR_OP;
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if (fcm->data_fir)
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fcm->reg_fir |= (fcm->data_fir << OP_SHIFT(fcm->opnr));
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LBC_WRITE(FIR, fcm->reg_fir);
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LBC_WRITE(FCR, fcm->reg_fcr);
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LBC_WRITE(FMR, fmr);
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LBC_WRITE(FBCR, fcm->reg_fbcr);
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LBC_WRITE(FBAR, fcm->reg_fbar);
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LBC_WRITE(FPAR, fcm->reg_fpar);
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if (fcm->addr_type == ADDR_ID)
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LBC_WRITE(MDR, fcm->reg_mdr);
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nand_debug(NDBG_DRV, "BEFORE:\nFMR=%#x, FIR=%#x, FCR=%#x", fmr,
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fcm->reg_fir, fcm->reg_fcr);
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nand_debug(NDBG_DRV, "MDR=%#x, FBAR=%#x, FPAR=%#x, FBCR=%#x",
|
|
LBC_READ(MDR), fcm->reg_fbar, fcm->reg_fpar, fcm->reg_fbcr);
|
|
|
|
LBC_WRITE(LSOR, sc->dinfo->di_bank);
|
|
|
|
timeout = (cold) ? FSL_FCM_WAIT_TIMEOUT : ~0;
|
|
error = 0;
|
|
ltesr_v = LBC_READ(LTESR);
|
|
while (!error && (ltesr_v & LTESR_CC) == 0) {
|
|
if (cold) {
|
|
DELAY(1000);
|
|
timeout--;
|
|
if (timeout < 0)
|
|
error = EWOULDBLOCK;
|
|
} else
|
|
error = tsleep(device_get_parent(sc->dev), PRIBIO,
|
|
"nfcfsl", hz);
|
|
ltesr_v = LBC_READ(LTESR);
|
|
}
|
|
if (error)
|
|
nand_debug(NDBG_DRV, "Command complete wait timeout\n");
|
|
|
|
nand_debug(NDBG_DRV, "AFTER:\nLTESR=%#x, LTEDR=%#x, LTEIR=%#x,"
|
|
" LTEATR=%#x, LTEAR=%#x, LTECCR=%#x", ltesr_v,
|
|
LBC_READ(LTEDR), LBC_READ(LTEIR), LBC_READ(LTEATR),
|
|
LBC_READ(LTEAR), LBC_READ(LTECCR));
|
|
|
|
bzero(&fcm->fcm_startzero,
|
|
__rangeof(struct fsl_nfc_fcm, fcm_startzero, fcm_endzero));
|
|
|
|
if (fcm->status)
|
|
sc->fcm.reg_mdr = LBC_READ(MDR);
|
|
|
|
/* Even if timeout occurred, we should perform steps below */
|
|
LBC_WRITE(LTESR, ltesr_v);
|
|
LBC_WRITE(LTEATR, 0);
|
|
|
|
return (error);
|
|
}
|
|
|
|
static uint8_t
|
|
fsl_nfc_read_byte(device_t dev)
|
|
{
|
|
struct fsl_nand_softc *sc = device_get_softc(dev);
|
|
uint32_t offset;
|
|
|
|
// device_printf(dev, "%s()\n", __func__);
|
|
|
|
/*
|
|
* LBC controller allows us to read status into a MDR instead of FCM
|
|
* buffer. If last operation requested before read_byte() was STATUS,
|
|
* then return MDR instead of reading a single byte from a buffer.
|
|
*/
|
|
if (sc->fcm.status) {
|
|
sc->fcm.status = 0;
|
|
return (sc->fcm.reg_mdr);
|
|
}
|
|
|
|
KASSERT(sc->fcm.read_ptr < sc->pgsz,
|
|
("Attempt to read beyond buffer %x %x", sc->fcm.read_ptr,
|
|
sc->pgsz));
|
|
|
|
offset = sc->fcm.buf_ofs + sc->fcm.read_ptr;
|
|
sc->fcm.read_ptr++;
|
|
return (bus_read_1(sc->res, offset));
|
|
}
|
|
|
|
static void
|
|
fsl_nfc_read_buf(device_t dev, void *buf, uint32_t len)
|
|
{
|
|
struct fsl_nand_softc *sc = device_get_softc(dev);
|
|
uint32_t offset;
|
|
int bytesleft = 0;
|
|
|
|
// device_printf(dev, "%s(buf=%p, len=%u)\n", __func__, buf, len);
|
|
|
|
nand_debug(NDBG_DRV, "REQUEST OF 0x%0x B (BIB=0x%0x, NTR=0x%0x)",
|
|
len, sc->pgsz, sc->fcm.read_ptr);
|
|
|
|
bytesleft = MIN((unsigned int)len, sc->pgsz - sc->fcm.read_ptr);
|
|
|
|
offset = sc->fcm.buf_ofs + sc->fcm.read_ptr;
|
|
bus_read_region_1(sc->res, offset, buf, bytesleft);
|
|
sc->fcm.read_ptr += bytesleft;
|
|
}
|
|
|
|
static void
|
|
fsl_nfc_write_buf(device_t dev, void *buf, uint32_t len)
|
|
{
|
|
struct fsl_nand_softc *sc = device_get_softc(dev);
|
|
uint32_t offset;
|
|
int bytesleft = 0;
|
|
|
|
// device_printf(dev, "%s(buf=%p, len=%u)\n", __func__, buf, len);
|
|
|
|
KASSERT(len <= sc->pgsz - sc->fcm.read_ptr,
|
|
("Attempt to write beyond buffer"));
|
|
|
|
bytesleft = MIN((unsigned int)len, sc->pgsz - sc->fcm.read_ptr);
|
|
|
|
nand_debug(NDBG_DRV, "REQUEST TO WRITE 0x%0x (BIB=0x%0x, NTR=0x%0x)",
|
|
bytesleft, sc->pgsz, sc->fcm.read_ptr);
|
|
|
|
offset = sc->fcm.buf_ofs + sc->fcm.read_ptr;
|
|
bus_write_region_1(sc->res, offset, buf, bytesleft);
|
|
sc->fcm.read_ptr += bytesleft;
|
|
}
|
|
|
|
static int
|
|
fsl_nand_chip_preprobe(device_t dev, struct nand_id *id)
|
|
{
|
|
|
|
if (fsl_nfc_send_command(dev, NAND_CMD_RESET) != 0)
|
|
return (ENXIO);
|
|
|
|
if (fsl_nfc_start_command(dev) != 0)
|
|
return (ENXIO);
|
|
|
|
DELAY(1000);
|
|
|
|
if (fsl_nfc_send_command(dev, NAND_CMD_READ_ID))
|
|
return (ENXIO);
|
|
|
|
if (fsl_nfc_send_address(dev, 0))
|
|
return (ENXIO);
|
|
|
|
if (fsl_nfc_start_command(dev) != 0)
|
|
return (ENXIO);
|
|
|
|
DELAY(25);
|
|
|
|
id->man_id = fsl_nfc_read_byte(dev);
|
|
id->dev_id = fsl_nfc_read_byte(dev);
|
|
|
|
nand_debug(NDBG_DRV, "manufacturer id: %x chip id: %x",
|
|
id->man_id, id->dev_id);
|
|
|
|
return (0);
|
|
}
|
|
|
|
#ifdef NAND_DEBUG_TIMING
|
|
|
|
static SYSCTL_NODE(_debug, OID_AUTO, fcm, CTLFLAG_RD, 0, "FCM timing");
|
|
|
|
static u_int csct = 1; /* 22: Chip select to command time (trlx). */
|
|
SYSCTL_UINT(_debug_fcm, OID_AUTO, csct, CTLFLAG_RW, &csct, 1,
|
|
"Chip select to command time: determines how far in advance -LCSn is "
|
|
"asserted prior to any bus activity during a NAND Flash access handled "
|
|
"by the FCM. This helps meet chip-select setup times for slow memories.");
|
|
|
|
static u_int cst = 1; /* 23: Command setup time (trlx). */
|
|
SYSCTL_UINT(_debug_fcm, OID_AUTO, cst, CTLFLAG_RW, &cst, 1,
|
|
"Command setup time: determines the delay of -LFWE assertion relative to "
|
|
"the command, address, or data change when the external memory access "
|
|
"is handled by the FCM.");
|
|
|
|
static u_int cht = 1; /* 24: Command hold time (trlx). */
|
|
SYSCTL_UINT(_debug_fcm, OID_AUTO, cht, CTLFLAG_RW, &cht, 1,
|
|
"Command hold time: determines the -LFWE negation prior to the command, "
|
|
"address, or data change when the external memory access is handled by "
|
|
"the FCM.");
|
|
|
|
static u_int scy = 2; /* 25-27: Cycle length in bus clocks */
|
|
SYSCTL_UINT(_debug_fcm, OID_AUTO, scy, CTLFLAG_RW, &scy, 2,
|
|
"Cycle length in bus clocks: see RM");
|
|
|
|
static u_int rst = 1; /* 28: Read setup time (trlx). */
|
|
SYSCTL_UINT(_debug_fcm, OID_AUTO, rst, CTLFLAG_RW, &rst, 1,
|
|
"Read setup time: determines the delay of -LFRE assertion relative to "
|
|
"sampling of read data when the external memory access is handled by "
|
|
"the FCM.");
|
|
|
|
static u_int trlx = 1; /* 29: Timing relaxed. */
|
|
SYSCTL_UINT(_debug_fcm, OID_AUTO, trlx, CTLFLAG_RW, &trlx, 1,
|
|
"Timing relaxed: modifies the settings of timing parameters for slow "
|
|
"memories. See RM");
|
|
|
|
static u_int ehtr = 1; /* 30: Extended hold time on read accesses. */
|
|
SYSCTL_UINT(_debug_fcm, OID_AUTO, ehtr, CTLFLAG_RW, &ehtr, 1,
|
|
"Extended hold time on read accesses: indicates with TRLX how many "
|
|
"cycles are inserted between a read access from the current bank and "
|
|
"the next access.");
|
|
|
|
static u_int
|
|
fsl_nand_get_timing(void)
|
|
{
|
|
u_int timing;
|
|
|
|
timing = ((csct & 1) << 9) | ((cst & 1) << 8) | ((cht & 1) << 7) |
|
|
((scy & 7) << 4) | ((rst & 1) << 3) | ((trlx & 1) << 2) |
|
|
((ehtr & 1) << 1);
|
|
|
|
printf("nfc_fsl: timing = %u\n", timing);
|
|
return (timing);
|
|
}
|
|
|
|
static int
|
|
fsl_sysctl_program(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct fsl_nand_softc *sc;
|
|
int error, i;
|
|
device_t dev;
|
|
uint32_t or_v;
|
|
|
|
error = sysctl_wire_old_buffer(req, sizeof(int));
|
|
if (error == 0) {
|
|
i = 0;
|
|
error = sysctl_handle_int(oidp, &i, 0, req);
|
|
}
|
|
if (error != 0 || req->newptr == NULL)
|
|
return (error);
|
|
|
|
for (i = 0; i < 8; i++) {
|
|
dev = fcm_devs[i];
|
|
if (dev == NULL)
|
|
continue;
|
|
sc = device_get_softc(dev);
|
|
|
|
/* Reprogram OR(x) */
|
|
or_v = lbc_read_reg(dev, LBC85XX_OR(sc->dinfo->di_bank));
|
|
or_v &= 0xfffffc00;
|
|
or_v |= fsl_nand_get_timing();
|
|
lbc_write_reg(dev, LBC85XX_OR(sc->dinfo->di_bank), or_v);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
SYSCTL_PROC(_debug_fcm, OID_AUTO, program, CTLTYPE_INT | CTLFLAG_RW, NULL, 0,
|
|
fsl_sysctl_program, "I", "write to program FCM with current values");
|
|
|
|
#endif /* NAND_DEBUG_TIMING */
|