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u-boot/board/mpl/pati/cmd_pati.c
Wolfgang Denk 54841ab50c Make sure that argv[] argument pointers are not modified. 
The hush shell dynamically allocates (and re-allocates) memory for the
argument strings in the "char *argv[]" argument vector passed to
commands.  Any code that modifies these pointers will cause serious
corruption of the malloc data structures and crash U-Boot, so make
sure the compiler can check that no such modifications are being done
by changing the code into "char * const argv[]".

This modification is the result of debugging a strange crash caused
after adding a new command, which used the following argument
processing code which has been working perfectly fine in all Unix
systems since version 6 - but not so in U-Boot:

int main (int argc, char **argv)
{
	while (--argc > 0 && **++argv == '-') {
/* ====> */	while (*++*argv) {
			switch (**argv) {
			case 'd':
				debug++;
				break;
			...
			default:
				usage ();
			}
		}
	}
	...
}

The line marked "====>" will corrupt the malloc data structures and
usually cause U-Boot to crash when the next command gets executed by
the shell.  With the modification, the compiler will prevent this with
an
	error: increment of read-only location '*argv'

N.B.: The code above can be trivially rewritten like this:

	while (--argc > 0 && **++argv == '-') {
		char *arg = *argv;
		while (*++arg) {
			switch (*arg) {
			...

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>
2010-07-04 23:55:42 +02:00

449 lines
15 KiB
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/*
* (C) Copyright 2001
* Denis Peter, MPL AG Switzerland, d.peter@mpl.ch
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
* Adapted for PATI
*/
#include <common.h>
#include <command.h>
#define PLX9056_LOC
#include "plx9056.h"
#include "pati.h"
#include "pci_eeprom.h"
extern void show_pld_regs(void);
extern int do_mplcommon(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
extern void user_led0(int led_on);
extern void user_led1(int led_on);
/* ------------------------------------------------------------------------- */
#if defined(CONFIG_SYS_PCI_CON_DEVICE)
extern void pci_con_disc(void);
extern void pci_con_connect(void);
#endif
/******************************************************************************
* Eeprom Support
******************************************************************************/
unsigned long get32(unsigned long addr)
{
unsigned long *p=(unsigned long *)addr;
return *p;
}
void set32(unsigned long addr,unsigned long data)
{
unsigned long *p=(unsigned long *)addr;
*p=data;
}
#define PCICFG_GET_REG(x) (get32((x) + PCI_CONFIG_BASE))
#define PCICFG_SET_REG(x,y) (set32((x) + PCI_CONFIG_BASE,(y)))
/******************************************************************************
* reload_pci_eeprom
******************************************************************************/
static void reload_pci_eeprom(void)
{
unsigned long reg;
/* Set Bit 29 and clear it again */
reg=PCICFG_GET_REG(PCI9056_EEPROM_CTRL_STAT);
udelay(1);
/* set it*/
reg|=(1<<29);
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,reg);
/* EECLK @ 33MHz = 125kHz
* -> extra long load = 32 * 16bit = 512Bit @ 125kHz = 4.1msec
* use 20msec
*/
udelay(20000); /* wait 20ms */
reg &= ~(1<<29); /* set it low */
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,reg);
udelay(1); /* wait some time */
}
/******************************************************************************
* clock_pci_eeprom
******************************************************************************/
static void clock_pci_eeprom(void)
{
unsigned long reg;
/* clock is low, data is valid */
reg=PCICFG_GET_REG(PCI9056_EEPROM_CTRL_STAT);
udelay(1);
/* set clck high */
reg|=(1<<24);
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,reg);
udelay(1); /* wait some time */
reg &= ~(1<<24); /* set clock low */
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,reg);
udelay(1); /* wait some time */
}
/******************************************************************************
* send_pci_eeprom_cmd
******************************************************************************/
static void send_pci_eeprom_cmd(unsigned long cmd, unsigned char len)
{
unsigned long reg;
int i;
reg=PCICFG_GET_REG(PCI9056_EEPROM_CTRL_STAT);
/* Clear all EEPROM bits */
reg &= ~(0xF << 24);
/* Toggle EEPROM's Chip select to get it out of Shift Register Mode */
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,reg);
udelay(1); /* wait some time */
/* Enable EEPROM Chip Select */
reg |= (1 << 25);
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,reg);
/* Send EEPROM command - one bit at a time */
for (i = (int)(len-1); i >= 0; i--) {
/* Check if current bit is 0 or 1 */
if (cmd & (1 << i))
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,(reg | (1<<26)));
else
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,reg);
clock_pci_eeprom();
}
}
/******************************************************************************
* write_pci_eeprom_offs
******************************************************************************/
static void write_pci_eeprom_offs(unsigned short offset, unsigned short value)
{
unsigned long reg;
int bitpos, cmdshft, cmdlen, timeout;
/* we're using the Eeprom 93CS66 */
cmdshft = 2;
cmdlen = EE66_CMD_LEN;
/* Send Write_Enable command to EEPROM */
send_pci_eeprom_cmd((EE_WREN << cmdshft),cmdlen);
/* Send EEPROM Write command and offset to EEPROM */
send_pci_eeprom_cmd((EE_WRITE << cmdshft) | (offset / 2),cmdlen);
reg=PCICFG_GET_REG(PCI9056_EEPROM_CTRL_STAT);
/* Clear all EEPROM bits */
reg &= ~(0xF << 24);
/* Make sure EEDO Input is disabled for some PLX chips */
reg &= ~(1 << 31);
/* Enable EEPROM Chip Select */
reg |= (1 << 25);
/* Write 16-bit value to EEPROM - one bit at a time */
for (bitpos = 15; bitpos >= 0; bitpos--) {
/* Get bit value and shift into result */
if (value & (1 << bitpos))
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,(reg | (1<<26)));
else
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,reg );
clock_pci_eeprom();
} /* for */
/* Deselect Chip */
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,reg & ~(1 << 25));
/* Re-select Chip */
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,reg | (1 << 25));
/* A small delay is needed to let EEPROM complete */
timeout = 0;
do {
udelay(10);
reg=PCICFG_GET_REG(PCI9056_EEPROM_CTRL_STAT);
timeout++;
} while (((reg & (1 << 27)) == 0) && timeout < 20000);
/* Send Write_Disable command to EEPROM */
send_pci_eeprom_cmd((EE_WDS << cmdshft),cmdlen);
/* Clear Chip Select and all other EEPROM bits */
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,reg & ~(0xF << 24));
}
/******************************************************************************
* read_pci_eeprom_offs
******************************************************************************/
static void read_pci_eeprom_offs(unsigned short offset, unsigned short *pvalue)
{
unsigned long reg;
int bitpos, cmdshft, cmdlen;
/* we're using the Eeprom 93CS66 */
cmdshft = 2;
cmdlen = EE66_CMD_LEN;
/* Send EEPROM read command and offset to EEPROM */
send_pci_eeprom_cmd((EE_READ << cmdshft) | (offset / 2),cmdlen);
/* Set EEPROM write output bit */
reg=PCICFG_GET_REG(PCI9056_EEPROM_CTRL_STAT);
/* Set EEDO Input enable */
reg |= (1 << 31);
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,reg | (1 << 26));
/* Get 16-bit value from EEPROM - one bit at a time */
for (bitpos = 0; bitpos < 16; bitpos++) {
clock_pci_eeprom();
udelay(10);
reg=PCICFG_GET_REG(PCI9056_EEPROM_CTRL_STAT);
/* Get bit value and shift into result */
if (reg & (1 << 27))
*pvalue = (unsigned short)((*pvalue << 1) | 1);
else
*pvalue = (unsigned short)(*pvalue << 1);
}
/* Clear EEDO Input enable */
reg &= ~(1 << 31);
/* Clear Chip Select and all other EEPROM bits */
PCICFG_SET_REG(PCI9056_EEPROM_CTRL_STAT,reg & ~(0xF << 24));
}
/******************************************************************************
* EEPROM read/writes
******************************************************************************/
#undef EEPROM_DBG
static int pati_pci_eeprom_erase(void)
{
int i;
printf("Erasing EEPROM ");
for( i=0; i < PATI_EEPROM_LAST_OFFSET; i+=2) {
write_pci_eeprom_offs(i,0xffff);
if((i%0x10))
printf(".");
}
printf("\nDone\n");
return 0;
}
static int pati_pci_eeprom_prg(void)
{
int i;
i=0;
printf("Programming EEPROM ");
while(pati_eeprom[i].offset<0xffff) {
write_pci_eeprom_offs(pati_eeprom[i].offset,pati_eeprom[i].value);
#ifdef EEPROM_DBG
printf("0x%04X: 0x%04X\n",pati_eeprom[i].offset, pati_eeprom[i].value);
#else
if((i%0x10))
printf(".");
#endif
i++;
}
printf("\nDone\n");
return 0;
}
static int pati_pci_eeprom_write(unsigned short offset, unsigned long addr, unsigned short size)
{
int i;
unsigned short value;
unsigned short *buffer =(unsigned short *)addr;
if((offset + size) > PATI_EEPROM_LAST_OFFSET) {
size = PATI_EEPROM_LAST_OFFSET - offset;
}
printf("Write To EEPROM from 0x%lX to 0x%X 0x%X words\n", addr, offset, size/2);
for( i = offset; i< (offset + size); i+=2) {
value = *buffer++;
write_pci_eeprom_offs(i,value);
#ifdef EEPROM_DBG
printf("0x%04X: 0x%04X\n",i, value);
#else
if((i%0x10))
printf(".");
#endif
}
printf("\nDone\n");
return 0;
}
static int pati_pci_eeprom_read(unsigned short offset, unsigned long addr, unsigned short size)
{
int i;
unsigned short value = 0;
unsigned short *buffer =(unsigned short *)addr;
if((offset + size) > PATI_EEPROM_LAST_OFFSET) {
size = PATI_EEPROM_LAST_OFFSET - offset;
}
printf("Read from EEPROM from 0x%X to 0x%lX 0x%X words\n", offset, addr, size/2);
for( i = offset; i< (offset + size); i+=2) {
read_pci_eeprom_offs(i,&value);
*buffer++=value;
#ifdef EEPROM_DBG
printf("0x%04X: 0x%04X\n",i, value);
#else
if((i%0x10))
printf(".");
#endif
}
printf("\nDone\n");
return 0;
}
/******************************************************************************
* PCI Bridge Registers Dump
*******************************************************************************/
static void display_pci_regs(void)
{
printf(" PCI9056_SPACE0_RANGE %08lX\n",PCICFG_GET_REG(PCI9056_SPACE0_RANGE));
printf(" PCI9056_SPACE0_REMAP %08lX\n",PCICFG_GET_REG(PCI9056_SPACE0_REMAP));
printf(" PCI9056_LOCAL_DMA_ARBIT %08lX\n",PCICFG_GET_REG(PCI9056_LOCAL_DMA_ARBIT));
printf(" PCI9056_ENDIAN_DESC %08lX\n",PCICFG_GET_REG(PCI9056_ENDIAN_DESC));
printf(" PCI9056_EXP_ROM_RANGE %08lX\n",PCICFG_GET_REG(PCI9056_EXP_ROM_RANGE));
printf(" PCI9056_EXP_ROM_REMAP %08lX\n",PCICFG_GET_REG(PCI9056_EXP_ROM_REMAP));
printf(" PCI9056_SPACE0_ROM_DESC %08lX\n",PCICFG_GET_REG(PCI9056_SPACE0_ROM_DESC));
printf(" PCI9056_DM_RANGE %08lX\n",PCICFG_GET_REG(PCI9056_DM_RANGE));
printf(" PCI9056_DM_MEM_BASE %08lX\n",PCICFG_GET_REG(PCI9056_DM_MEM_BASE));
printf(" PCI9056_DM_IO_BASE %08lX\n",PCICFG_GET_REG(PCI9056_DM_IO_BASE));
printf(" PCI9056_DM_PCI_MEM_REMAP %08lX\n",PCICFG_GET_REG(PCI9056_DM_PCI_MEM_REMAP));
printf(" PCI9056_DM_PCI_IO_CONFIG %08lX\n",PCICFG_GET_REG(PCI9056_DM_PCI_IO_CONFIG));
printf(" PCI9056_SPACE1_RANGE %08lX\n",PCICFG_GET_REG(PCI9056_SPACE1_RANGE));
printf(" PCI9056_SPACE1_REMAP %08lX\n",PCICFG_GET_REG(PCI9056_SPACE1_REMAP));
printf(" PCI9056_SPACE1_DESC %08lX\n",PCICFG_GET_REG(PCI9056_SPACE1_DESC));
printf(" PCI9056_DM_DAC %08lX\n",PCICFG_GET_REG(PCI9056_DM_DAC));
printf(" PCI9056_MAILBOX0 %08lX\n",PCICFG_GET_REG(PCI9056_MAILBOX0));
printf(" PCI9056_MAILBOX1 %08lX\n",PCICFG_GET_REG(PCI9056_MAILBOX1));
printf(" PCI9056_MAILBOX2 %08lX\n",PCICFG_GET_REG(PCI9056_MAILBOX2));
printf(" PCI9056_MAILBOX3 %08lX\n",PCICFG_GET_REG(PCI9056_MAILBOX3));
printf(" PCI9056_MAILBOX4 %08lX\n",PCICFG_GET_REG(PCI9056_MAILBOX4));
printf(" PCI9056_MAILBOX5 %08lX\n",PCICFG_GET_REG(PCI9056_MAILBOX5));
printf(" PCI9056_MAILBOX6 %08lX\n",PCICFG_GET_REG(PCI9056_MAILBOX6));
printf(" PCI9056_MAILBOX7 %08lX\n",PCICFG_GET_REG(PCI9056_MAILBOX7));
printf(" PCI9056_PCI_TO_LOC_DBELL %08lX\n",PCICFG_GET_REG(PCI9056_PCI_TO_LOC_DBELL));
printf(" PCI9056_LOC_TO_PCI_DBELL %08lX\n",PCICFG_GET_REG(PCI9056_LOC_TO_PCI_DBELL));
printf(" PCI9056_INT_CTRL_STAT %08lX\n",PCICFG_GET_REG(PCI9056_INT_CTRL_STAT));
printf(" PCI9056_EEPROM_CTRL_STAT %08lX\n",PCICFG_GET_REG(PCI9056_EEPROM_CTRL_STAT));
printf(" PCI9056_PERM_VENDOR_ID %08lX\n",PCICFG_GET_REG(PCI9056_PERM_VENDOR_ID));
printf(" PCI9056_REVISION_ID %08lX\n",PCICFG_GET_REG(PCI9056_REVISION_ID));
printf(" \n");
printf(" PCI9056_VENDOR_ID %08lX\n",PCICFG_GET_REG(PCI9056_VENDOR_ID));
printf(" PCI9056_COMMAND %08lX\n",PCICFG_GET_REG(PCI9056_COMMAND));
printf(" PCI9056_REVISION %08lX\n",PCICFG_GET_REG(PCI9056_REVISION));
printf(" PCI9056_CACHE_SIZE %08lX\n",PCICFG_GET_REG(PCI9056_CACHE_SIZE));
printf(" PCI9056_RTR_BASE %08lX\n",PCICFG_GET_REG(PCI9056_RTR_BASE));
printf(" PCI9056_RTR_IO_BASE %08lX\n",PCICFG_GET_REG(PCI9056_RTR_IO_BASE));
printf(" PCI9056_LOCAL_BASE0 %08lX\n",PCICFG_GET_REG(PCI9056_LOCAL_BASE0));
printf(" PCI9056_LOCAL_BASE1 %08lX\n",PCICFG_GET_REG(PCI9056_LOCAL_BASE1));
printf(" PCI9056_UNUSED_BASE1 %08lX\n",PCICFG_GET_REG(PCI9056_UNUSED_BASE1));
printf(" PCI9056_UNUSED_BASE2 %08lX\n",PCICFG_GET_REG(PCI9056_UNUSED_BASE2));
printf(" PCI9056_CIS_PTR %08lX\n",PCICFG_GET_REG(PCI9056_CIS_PTR));
printf(" PCI9056_SUB_ID %08lX\n",PCICFG_GET_REG(PCI9056_SUB_ID));
printf(" PCI9056_EXP_ROM_BASE %08lX\n",PCICFG_GET_REG(PCI9056_EXP_ROM_BASE));
printf(" PCI9056_CAP_PTR %08lX\n",PCICFG_GET_REG(PCI9056_CAP_PTR));
printf(" PCI9056_INT_LINE %08lX\n",PCICFG_GET_REG(PCI9056_INT_LINE));
printf(" PCI9056_PM_CAP_ID %08lX\n",PCICFG_GET_REG(PCI9056_PM_CAP_ID));
printf(" PCI9056_PM_CSR %08lX\n",PCICFG_GET_REG(PCI9056_PM_CSR));
printf(" PCI9056_HS_CAP_ID %08lX\n",PCICFG_GET_REG(PCI9056_HS_CAP_ID));
printf(" PCI9056_VPD_CAP_ID %08lX\n",PCICFG_GET_REG(PCI9056_VPD_CAP_ID));
printf(" PCI9056_VPD_DATA %08lX\n",PCICFG_GET_REG(PCI9056_VPD_DATA));
}
int do_pati(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
if (strcmp(argv[1], "info") == 0)
{
show_pld_regs();
return 0;
}
if (strcmp(argv[1], "pci") == 0)
{
display_pci_regs();
return 0;
}
if (strcmp(argv[1], "led") == 0)
{
int led_nr,led_on;
led_nr = (int)simple_strtoul(argv[2], NULL, 10);
led_on = (int)simple_strtoul(argv[3], NULL, 10);
if(!led_nr)
user_led0(led_on);
else
user_led1(led_on);
return 0;
}
#if defined(CONFIG_SYS_PCI_CON_DEVICE)
if (strcmp(argv[1], "con") == 0) {
pci_con_connect();
return 0;
}
if (strcmp(argv[1], "disc") == 0) {
pci_con_disc();
return 0;
}
#endif
if (strcmp(argv[1], "eeprom") == 0) {
unsigned long addr;
int size, offset;
offset = 0;
size = PATI_EEPROM_LAST_OFFSET;
if(argc>2) {
if(argc>3) {
addr = simple_strtoul(argv[3], NULL, 16);
if(argc>4)
offset = (int) simple_strtoul(argv[4], NULL, 16);
if(argc>5)
size = (int) simple_strtoul(argv[5], NULL, 16);
if (strcmp(argv[2], "read") == 0) {
return (pati_pci_eeprom_read(offset, addr, size));
}
if (strcmp(argv[2], "write") == 0) {
return (pati_pci_eeprom_write(offset, addr, size));
}
}
if (strcmp(argv[2], "prg") == 0) {
return (pati_pci_eeprom_prg());
}
if (strcmp(argv[2], "era") == 0) {
return (pati_pci_eeprom_erase());
}
if (strcmp(argv[2], "reload") == 0) {
reload_pci_eeprom();
return 0;
}
}
}
return (do_mplcommon(cmdtp, flag, argc, argv));
}
U_BOOT_CMD(
pati, 8, 1, do_pati,
"PATI specific Cmds",
"info - displays board information\n"
"pati pci - displays PCI registers\n"
"pati led <nr> <on> \n"
" - switch LED <nr> <on>\n"
"pati flash mem [SrcAddr]\n"
" - updates U-Boot with image in memory\n"
"pati eeprom <cmd> - PCI EEPROM sub-system\n"
" read <addr> <offset> <size>\n"
" - read PCI EEPROM to <addr> from <offset> <size> words\n"
" write <addr> <offset> <size>\n"
" - write PCI EEPROM from <addr> to <offset> <size> words\n"
" prg - programm PCI EEPROM with default values\n"
" era - erase PCI EEPROM (write all word to 0xffff)\n"
" reload- Reload PCI Bridge with EEPROM Values\n"
" NOTE: <addr> must start on word boundary\n"
" <offset> and <size> must be even byte values"
);
/* ------------------------------------------------------------------------- */
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