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![wdenk](/assets/img/avatar_default.png)
* Patch by Scott McNutt, 02 Jan 2004: Add support for the Nios Active Serial Memory Interface (ASMI) on Cyclone devices * Patch by Andrea Marson, 16 Dec 2003: Add support for the PPChameleon ME and HI modules * Patch by Yuli Barcohen, 22 Dec 2003: Add support for Motorola DUET ADS board (MPC87x/88x)
696 lines
15 KiB
C
696 lines
15 KiB
C
/*
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* (C) Copyright 2003, Psyent Corporation <www.psyent.com>
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* Scott McNutt <smcnutt@psyent.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#if defined(CONFIG_NIOS_ASMI)
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#include <command.h>
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#include <nios-io.h>
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#if !defined(CFG_NIOS_ASMIBASE)
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#error "*** CFG_NIOS_ASMIBASE not defined ***"
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#endif
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/*-----------------------------------------------------------------------*/
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#define SHORT_HELP\
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"asmi - read/write Cyclone ASMI configuration device.\n"
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#define LONG_HELP\
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"\n"\
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"asmi erase start [end]\n"\
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" - erase sector start or sectors start through end.\n"\
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"asmi info\n"\
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" - display ASMI device information.\n"\
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"asmi protect on | off\n"\
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" - turn device protection on or off.\n"\
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"asmi read addr offset count\n"\
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" - read count bytes from offset to addr.\n"\
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"asmi write addr offset count\n"\
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" - write count bytes to offset from addr.\n"\
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"asmi verify addr offset count\n"\
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" - verify count bytes at offset from addr.\n"
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/*-----------------------------------------------------------------------*/
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/* Operation codes for serial configuration devices
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*/
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#define ASMI_WRITE_ENA 0x06 /* Write enable */
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#define ASMI_WRITE_DIS 0x04 /* Write disable */
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#define ASMI_READ_STAT 0x05 /* Read status */
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#define ASMI_READ_BYTES 0x03 /* Read bytes */
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#define ASMI_READ_ID 0xab /* Read silicon id */
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#define ASMI_WRITE_STAT 0x01 /* Write status */
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#define ASMI_WRITE_BYTES 0x02 /* Write bytes */
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#define ASMI_ERASE_BULK 0xc7 /* Erase entire device */
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#define ASMI_ERASE_SECT 0xd8 /* Erase sector */
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/* Device status register bits
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*/
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#define ASMI_STATUS_WIP (1<<0) /* Write in progress */
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#define ASMI_STATUS_WEL (1<<1) /* Write enable latch */
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static nios_asmi_t *asmi = (nios_asmi_t *)CFG_NIOS_ASMIBASE;
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/***********************************************************************
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* Device access
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***********************************************************************/
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static void asmi_cs (int assert)
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{
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if (assert) {
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asmi->control |= NIOS_ASMI_SSO;
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} else {
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/* Let all bits shift out */
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while ((asmi->status & NIOS_ASMI_TMT) == 0)
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;
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asmi->control &= ~NIOS_ASMI_SSO;
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}
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}
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static void asmi_tx (unsigned char c)
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{
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while ((asmi->status & NIOS_ASMI_TRDY) == 0)
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;
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asmi->txdata = c;
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}
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static int asmi_rx (void)
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{
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while ((asmi->status & NIOS_ASMI_RRDY) == 0)
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;
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return (asmi->rxdata);
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}
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static unsigned char bitrev[] = {
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0x00, 0x08, 0x04, 0x0c, 0x02, 0x0a, 0x06, 0x0e,
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0x01, 0x09, 0x05, 0x0d, 0x03, 0x0b, 0x07, 0x0f
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};
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static unsigned char asmi_bitrev( unsigned char c )
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{
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unsigned char val;
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val = bitrev[c>>4];
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val |= bitrev[c & 0x0f]<<4;
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return (val);
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}
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static void asmi_rcv (unsigned char *dst, int len)
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{
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while (len--) {
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asmi_tx (0);
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*dst++ = asmi_rx ();
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}
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}
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static void asmi_rrcv (unsigned char *dst, int len)
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{
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while (len--) {
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asmi_tx (0);
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*dst++ = asmi_bitrev (asmi_rx ());
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}
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}
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static void asmi_snd (unsigned char *src, int len)
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{
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while (len--) {
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asmi_tx (*src++);
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asmi_rx ();
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}
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}
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static void asmi_rsnd (unsigned char *src, int len)
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{
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while (len--) {
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asmi_tx (asmi_bitrev (*src++));
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asmi_rx ();
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}
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}
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static void asmi_wr_enable (void)
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{
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asmi_cs (1);
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asmi_tx (ASMI_WRITE_ENA);
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asmi_rx ();
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asmi_cs (0);
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}
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static unsigned char asmi_status_rd (void)
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{
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unsigned char status;
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asmi_cs (1);
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asmi_tx (ASMI_READ_STAT);
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asmi_rx ();
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asmi_tx (0);
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status = asmi_rx ();
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asmi_cs (0);
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return (status);
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}
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static void asmi_status_wr (unsigned char status)
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{
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asmi_wr_enable ();
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asmi_cs (1);
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asmi_tx (ASMI_WRITE_STAT);
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asmi_rx ();
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asmi_tx (status);
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asmi_rx ();
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asmi_cs (0);
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return;
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}
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/***********************************************************************
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* Device information
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***********************************************************************/
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typedef struct asmi_devinfo_t {
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const char *name; /* Device name */
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unsigned char id; /* Device silicon id */
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unsigned char size; /* Total size log2(bytes)*/
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unsigned char num_sects; /* Number of sectors */
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unsigned char sz_sect; /* Sector size log2(bytes) */
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unsigned char sz_page; /* Page size log2(bytes) */
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unsigned char prot_mask; /* Protection mask */
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}asmi_devinfo_t;
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static struct asmi_devinfo_t devinfo[] = {
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{ "EPCS1 ", 0x10, 17, 4, 15, 8, 0x0c },
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{ "EPCS4 ", 0x12, 19, 8, 16, 8, 0x1c },
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{ 0, 0, 0, 0, 0, 0 }
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};
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static asmi_devinfo_t *asmi_dev_find (void)
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{
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unsigned char buf[4];
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unsigned char id;
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int i;
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struct asmi_devinfo_t *dev = NULL;
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/* Read silicon id requires 3 "dummy bytes" before it's put
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* on the wire.
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*/
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buf[0] = ASMI_READ_ID;
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buf[1] = 0;
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buf[2] = 0;
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buf[3] = 0;
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asmi_cs (1);
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asmi_snd (buf,4);
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asmi_rcv (buf,1);
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asmi_cs (0);
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id = buf[0];
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/* Find the info struct */
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i = 0;
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while (devinfo[i].name) {
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if (id == devinfo[i].id) {
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dev = &devinfo[i];
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break;
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}
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i++;
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}
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return (dev);
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}
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/***********************************************************************
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* Misc Utilities
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***********************************************************************/
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static unsigned asmi_cfgsz (void)
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{
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unsigned sz = 0;
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unsigned char buf[128];
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unsigned char *p;
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/* Read in the first 128 bytes of the device */
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buf[0] = ASMI_READ_BYTES;
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buf[1] = 0;
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buf[2] = 0;
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buf[3] = 0;
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asmi_cs (1);
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asmi_snd (buf,4);
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asmi_rrcv (buf, sizeof(buf));
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asmi_cs (0);
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/* Search for the starting 0x6a which is followed by the
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* 4-byte 'register' and 4-byte bit-count.
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*/
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p = buf;
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while (p < buf + sizeof(buf)-8) {
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if ( *p == 0x6a ) {
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/* Point to bit count and extract */
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p += 5;
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sz = *p++;
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sz |= *p++ << 8;
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sz |= *p++ << 16;
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sz |= *p++ << 24;
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/* Convert to byte count */
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sz += 7;
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sz >>= 3;
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} else if (*p == 0xff) {
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/* 0xff is ok ... just skip */
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p++;
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continue;
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} else {
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/* Not 0xff or 0x6a ... something's not
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* right ... report 'unknown' (sz=0).
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*/
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break;
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}
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}
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return (sz);
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}
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static int asmi_erase (unsigned start, unsigned end)
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{
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unsigned off, sectsz;
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unsigned char buf[4];
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struct asmi_devinfo_t *dev = asmi_dev_find ();
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if (!dev || (start>end))
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return (-1);
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/* Erase the requested sectors. An address is required
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* that lies within the requested sector -- we'll just
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* use the first address in the sector.
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*/
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printf ("asmi erasing sector %d ", start);
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if (start != end)
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printf ("to %d ", end);
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sectsz = (1 << dev->sz_sect);
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while (start <= end) {
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off = start * sectsz;
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start++;
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buf[0] = ASMI_ERASE_SECT;
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buf[1] = off >> 16;
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buf[2] = off >> 8;
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buf[3] = off;
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asmi_wr_enable ();
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asmi_cs (1);
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asmi_snd (buf,4);
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asmi_cs (0);
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printf ("."); /* Some user feedback */
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/* Wait for erase to complete */
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while (asmi_status_rd() & ASMI_STATUS_WIP)
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;
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}
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printf (" done.\n");
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return (0);
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}
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static int asmi_read (ulong addr, ulong off, ulong cnt)
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{
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unsigned char buf[4];
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buf[0] = ASMI_READ_BYTES;
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buf[1] = off >> 16;
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buf[2] = off >> 8;
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buf[3] = off;
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asmi_cs (1);
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asmi_snd (buf,4);
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asmi_rrcv ((unsigned char *)addr, cnt);
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asmi_cs (0);
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return (0);
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}
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static
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int asmi_write (ulong addr, ulong off, ulong cnt)
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{
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ulong wrcnt;
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unsigned pgsz;
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unsigned char buf[4];
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struct asmi_devinfo_t *dev = asmi_dev_find ();
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if (!dev)
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return (-1);
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pgsz = (1<<dev->sz_page);
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while (cnt) {
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if (off % pgsz)
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wrcnt = pgsz - (off % pgsz);
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else
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wrcnt = pgsz;
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wrcnt = (wrcnt > cnt) ? cnt : wrcnt;
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buf[0] = ASMI_WRITE_BYTES;
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buf[1] = off >> 16;
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buf[2] = off >> 8;
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buf[3] = off;
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asmi_wr_enable ();
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asmi_cs (1);
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asmi_snd (buf,4);
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asmi_rsnd ((unsigned char *)addr, wrcnt);
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asmi_cs (0);
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/* Wait for write to complete */
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while (asmi_status_rd() & ASMI_STATUS_WIP)
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;
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cnt -= wrcnt;
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off += wrcnt;
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addr += wrcnt;
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}
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return (0);
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}
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static
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int asmi_verify (ulong addr, ulong off, ulong cnt, ulong *err)
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{
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ulong rdcnt;
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unsigned char buf[256];
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unsigned char *start,*end;
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int i;
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start = end = (unsigned char *)addr;
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while (cnt) {
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rdcnt = (cnt>sizeof(buf)) ? sizeof(buf) : cnt;
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asmi_read ((ulong)buf, off, rdcnt);
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for (i=0; i<rdcnt; i++) {
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if (*end != buf[i]) {
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*err = end - start;
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return(-1);
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}
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end++;
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}
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cnt -= rdcnt;
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off += rdcnt;
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}
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return (0);
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}
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static int asmi_sect_erased (int sect, unsigned *offset,
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struct asmi_devinfo_t *dev)
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{
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unsigned char buf[128];
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unsigned off, end;
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unsigned sectsz;
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int i;
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sectsz = (1 << dev->sz_sect);
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off = sectsz * sect;
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end = off + sectsz;
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while (off < end) {
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asmi_read ((ulong)buf, off, sizeof(buf));
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for (i=0; i < sizeof(buf); i++) {
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if (buf[i] != 0xff) {
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*offset = off + i;
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return (0);
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}
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}
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off += sizeof(buf);
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}
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return (1);
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}
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/***********************************************************************
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* Commands
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***********************************************************************/
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static
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void do_asmi_info (struct asmi_devinfo_t *dev, int argc, char *argv[])
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{
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int i;
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unsigned char stat;
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unsigned tmp;
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int erased;
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/* Basic device info */
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printf ("%s: %d kbytes (%d sectors x %d kbytes,"
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" %d bytes/page)\n",
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dev->name, 1 << (dev->size-10),
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dev->num_sects, 1 << (dev->sz_sect-10),
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1 << dev->sz_page );
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/* Status -- for now protection is all-or-nothing */
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stat = asmi_status_rd();
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printf ("status: 0x%02x (WIP:%d, WEL:%d, PROT:%s)\n",
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stat,
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(stat & ASMI_STATUS_WIP) ? 1 : 0,
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(stat & ASMI_STATUS_WEL) ? 1 : 0,
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(stat & dev->prot_mask) ? "on" : "off" );
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/* Configuration */
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tmp = asmi_cfgsz ();
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if (tmp) {
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printf ("config: 0x%06x (%d) bytes\n", tmp, tmp );
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} else {
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printf ("config: unknown\n" );
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}
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/* Sector info */
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for (i=0; i<dev->num_sects; i++) {
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erased = asmi_sect_erased (i, &tmp, dev);
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printf (" %d: %06x ",
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i, i*(1<<dev->sz_sect) );
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if (erased)
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printf ("erased\n");
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else
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printf ("data @ 0x%06x\n", tmp);
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}
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return;
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}
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static
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void do_asmi_erase (struct asmi_devinfo_t *dev, int argc, char *argv[])
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{
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unsigned start,end;
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if ((argc < 3) || (argc > 4)) {
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printf ("USAGE: asmi erase sect [end]\n");
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return;
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}
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if ((asmi_status_rd() & dev->prot_mask) != 0) {
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printf ( "asmi: device protected.\n");
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return;
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}
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start = simple_strtoul (argv[2], NULL, 10);
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if (argc > 3)
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end = simple_strtoul (argv[3], NULL, 10);
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else
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end = start;
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if ((start >= dev->num_sects) || (start > end)) {
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printf ("asmi: invalid sector range: [%d:%d]\n",
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start, end );
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return;
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}
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asmi_erase (start, end);
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return;
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}
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static
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void do_asmi_protect (struct asmi_devinfo_t *dev, int argc, char *argv[])
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{
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unsigned char stat;
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/* For now protection is all-or-nothing to keep things
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* simple. The protection bits don't map in a linear
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* fashion ... and we would rather protect the bottom
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* of the device since it contains the config data and
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* leave the top unprotected for app use. But unfortunately
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* protection works from top-to-bottom so it does
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* really help very much from a software app point-of-view.
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*/
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if (argc < 3) {
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printf ("USAGE: asmi protect on | off\n");
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return;
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}
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if (!dev)
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return;
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/* Protection on/off is just a matter of setting/clearing
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* all protection bits in the status register.
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*/
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stat = asmi_status_rd ();
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if (strcmp ("on", argv[2]) == 0) {
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stat |= dev->prot_mask;
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} else if (strcmp ("off", argv[2]) == 0 ) {
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stat &= ~dev->prot_mask;
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} else {
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printf ("asmi: unknown protection: %s\n", argv[2]);
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return;
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}
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asmi_status_wr (stat);
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return;
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}
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static
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void do_asmi_read (struct asmi_devinfo_t *dev, int argc, char *argv[])
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{
|
|
ulong addr,off,cnt;
|
|
ulong sz;
|
|
|
|
if (argc < 5) {
|
|
printf ("USAGE: asmi read addr offset count\n");
|
|
return;
|
|
}
|
|
|
|
sz = 1 << dev->size;
|
|
addr = simple_strtoul (argv[2], NULL, 16);
|
|
off = simple_strtoul (argv[3], NULL, 16);
|
|
cnt = simple_strtoul (argv[4], NULL, 16);
|
|
if (off > sz) {
|
|
printf ("offset is greater than device size"
|
|
"... aborting.\n");
|
|
return;
|
|
}
|
|
if ((off + cnt) > sz) {
|
|
printf ("request exceeds device size"
|
|
"... truncating.\n");
|
|
cnt = sz - off;
|
|
}
|
|
printf ("asmi: read %08lx <- %06lx (0x%lx bytes)\n",
|
|
addr, off, cnt);
|
|
asmi_read (addr, off, cnt);
|
|
|
|
return;
|
|
}
|
|
|
|
static
|
|
void do_asmi_write (struct asmi_devinfo_t *dev, int argc, char *argv[])
|
|
{
|
|
ulong addr,off,cnt;
|
|
ulong sz;
|
|
ulong err;
|
|
|
|
if (argc < 5) {
|
|
printf ("USAGE: asmi write addr offset count\n");
|
|
return;
|
|
}
|
|
if ((asmi_status_rd() & dev->prot_mask) != 0) {
|
|
printf ( "asmi: device protected.\n");
|
|
return;
|
|
}
|
|
|
|
sz = 1 << dev->size;
|
|
addr = simple_strtoul (argv[2], NULL, 16);
|
|
off = simple_strtoul (argv[3], NULL, 16);
|
|
cnt = simple_strtoul (argv[4], NULL, 16);
|
|
if (off > sz) {
|
|
printf ("offset is greater than device size"
|
|
"... aborting.\n");
|
|
return;
|
|
}
|
|
if ((off + cnt) > sz) {
|
|
printf ("request exceeds device size"
|
|
"... truncating.\n");
|
|
cnt = sz - off;
|
|
}
|
|
printf ("asmi: write %08lx -> %06lx (0x%lx bytes)\n",
|
|
addr, off, cnt);
|
|
asmi_write (addr, off, cnt);
|
|
if (asmi_verify (addr, off, cnt, &err) != 0)
|
|
printf ("asmi: write error at offset %06lx\n", err);
|
|
|
|
return;
|
|
}
|
|
|
|
static
|
|
void do_asmi_verify (struct asmi_devinfo_t *dev, int argc, char *argv[])
|
|
{
|
|
ulong addr,off,cnt;
|
|
ulong sz;
|
|
ulong err;
|
|
|
|
if (argc < 5) {
|
|
printf ("USAGE: asmi verify addr offset count\n");
|
|
return;
|
|
}
|
|
|
|
sz = 1 << dev->size;
|
|
addr = simple_strtoul (argv[2], NULL, 16);
|
|
off = simple_strtoul (argv[3], NULL, 16);
|
|
cnt = simple_strtoul (argv[4], NULL, 16);
|
|
if (off > sz) {
|
|
printf ("offset is greater than device size"
|
|
"... aborting.\n");
|
|
return;
|
|
}
|
|
if ((off + cnt) > sz) {
|
|
printf ("request exceeds device size"
|
|
"... truncating.\n");
|
|
cnt = sz - off;
|
|
}
|
|
printf ("asmi: verify %08lx -> %06lx (0x%lx bytes)\n",
|
|
addr, off, cnt);
|
|
if (asmi_verify (addr, off, cnt, &err) != 0)
|
|
printf ("asmi: verify error at offset %06lx\n", err);
|
|
|
|
return;
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
int do_asmi (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
|
|
{
|
|
int len;
|
|
struct asmi_devinfo_t *dev = asmi_dev_find ();
|
|
|
|
if (argc < 2) {
|
|
printf ("Usage:%s", LONG_HELP);
|
|
return (0);
|
|
}
|
|
|
|
if (!dev) {
|
|
printf ("asmi: device not found.\n");
|
|
return (0);
|
|
}
|
|
|
|
len = strlen (argv[1]);
|
|
if (strncmp ("info", argv[1], len) == 0) {
|
|
do_asmi_info ( dev, argc, argv);
|
|
} else if (strncmp ("erase", argv[1], len) == 0) {
|
|
do_asmi_erase (dev, argc, argv);
|
|
} else if (strncmp ("protect", argv[1], len) == 0) {
|
|
do_asmi_protect (dev, argc, argv);
|
|
} else if (strncmp ("read", argv[1], len) == 0) {
|
|
do_asmi_read (dev, argc, argv);
|
|
} else if (strncmp ("write", argv[1], len) == 0) {
|
|
do_asmi_write (dev, argc, argv);
|
|
} else if (strncmp ("verify", argv[1], len) == 0) {
|
|
do_asmi_verify (dev, argc, argv);
|
|
} else {
|
|
printf ("asmi: unknown operation: %s\n", argv[1]);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------*/
|
|
|
|
|
|
U_BOOT_CMD( asmi, 5, 0, do_asmi, SHORT_HELP, LONG_HELP );
|
|
|
|
#endif /* CONFIG_NIOS_ASMI */
|