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u-boot/board/keymile/common/common.c

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/*
* (C) Copyright 2008
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
*
* 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
*/
#include <common.h>
#if defined(CONFIG_KM82XX)
#include <mpc8260.h>
#endif
#include <ioports.h>
#include <malloc.h>
#include <hush.h>
#include <net.h>
#include <netdev.h>
#include <asm/io.h>
#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
#include <libfdt.h>
#endif
#include "../common/common.h"
#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
#include <i2c.h>
static void i2c_write_start_seq(void);
static int i2c_make_abort(void);
DECLARE_GLOBAL_DATA_PTR;
int ivm_calc_crc(unsigned char *buf, int len)
{
const unsigned short crc_tab[16] = {
0x0000, 0xCC01, 0xD801, 0x1400,
0xF001, 0x3C00, 0x2800, 0xE401,
0xA001, 0x6C00, 0x7800, 0xB401,
0x5000, 0x9C01, 0x8801, 0x4400};
unsigned short crc = 0; /* final result */
unsigned short r1 = 0; /* temp */
unsigned char byte = 0; /* input buffer */
int i;
/* calculate CRC from array data */
for (i = 0; i < len; i++) {
byte = buf[i];
/* lower 4 bits */
r1 = crc_tab[crc & 0xF];
crc = ((crc) >> 4) & 0x0FFF;
crc = crc ^ r1 ^ crc_tab[byte & 0xF];
/* upper 4 bits */
r1 = crc_tab[crc & 0xF];
crc = (crc >> 4) & 0x0FFF;
crc = crc ^ r1 ^ crc_tab[(byte >> 4) & 0xF];
}
return crc;
}
/*
* Set Keymile specific environment variables
* Currently only some memory layout variables are calculated here
* ... ------------------------------------------------
* ... |@rootfsaddr |@pnvramaddr |@varaddr |@reserved |@END_OF_RAM
* ... |<------------------- pram ------------------->|
* ... ------------------------------------------------
* @END_OF_RAM: denotes the RAM size
* @pnvramaddr: Startadress of pseudo non volatile RAM in hex
* @pram : preserved ram size in k
* @varaddr : startadress for /var mounted into RAM
*/
int set_km_env(void)
{
uchar buf[32];
unsigned int pnvramaddr;
unsigned int pram;
unsigned int varaddr;
pnvramaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM
- CONFIG_KM_PNVRAM;
sprintf((char *)buf, "0x%x", pnvramaddr);
setenv("pnvramaddr", (char *)buf);
pram = (CONFIG_KM_RESERVED_PRAM + CONFIG_KM_PHRAM + CONFIG_KM_PNVRAM) /
0x400;
sprintf((char *)buf, "0x%x", pram);
setenv("pram", (char *)buf);
varaddr = gd->ram_size - CONFIG_KM_RESERVED_PRAM - CONFIG_KM_PHRAM;
sprintf((char *)buf, "0x%x", varaddr);
setenv("varaddr", (char *)buf);
return 0;
}
static int ivm_set_value(char *name, char *value)
{
char tempbuf[256];
if (value != NULL) {
sprintf(tempbuf, "%s=%s", name, value);
return set_local_var(tempbuf, 0);
} else {
unset_local_var(name);
}
return 0;
}
static int ivm_get_value(unsigned char *buf, int len, char *name, int off,
int check)
{
unsigned short val;
unsigned char valbuf[30];
if ((buf[off + 0] != buf[off + 2]) &&
(buf[off + 2] != buf[off + 4])) {
printf("%s Error corrupted %s\n", __func__, name);
val = -1;
} else {
val = buf[off + 0] + (buf[off + 1] << 8);
if ((val == 0) && (check == 1))
val = -1;
}
sprintf((char *)valbuf, "%x", val);
ivm_set_value(name, (char *)valbuf);
return val;
}
#define INV_BLOCKSIZE 0x100
#define INV_DATAADDRESS 0x21
#define INVENTORYDATASIZE (INV_BLOCKSIZE - INV_DATAADDRESS - 3)
#define IVM_POS_SHORT_TEXT 0
#define IVM_POS_MANU_ID 1
#define IVM_POS_MANU_SERIAL 2
#define IVM_POS_PART_NUMBER 3
#define IVM_POS_BUILD_STATE 4
#define IVM_POS_SUPPLIER_PART_NUMBER 5
#define IVM_POS_DELIVERY_DATE 6
#define IVM_POS_SUPPLIER_BUILD_STATE 7
#define IVM_POS_CUSTOMER_ID 8
#define IVM_POS_CUSTOMER_PROD_ID 9
#define IVM_POS_HISTORY 10
#define IVM_POS_SYMBOL_ONLY 11
static char convert_char(char c)
{
return (c < ' ' || c > '~') ? '.' : c;
}
static int ivm_findinventorystring(int type,
unsigned char* const string,
unsigned long maxlen,
unsigned char *buf)
{
int xcode = 0;
unsigned long cr = 0;
unsigned long addr = INV_DATAADDRESS;
unsigned long size = 0;
unsigned long nr = type;
int stop = 0; /* stop on semicolon */
memset(string, '\0', maxlen);
switch (type) {
case IVM_POS_SYMBOL_ONLY:
nr = 0;
stop= 1;
break;
default:
nr = type;
stop = 0;
}
/* Look for the requested number of CR. */
while ((cr != nr) && (addr < INVENTORYDATASIZE)) {
if ((buf[addr] == '\r')) {
cr++;
}
addr++;
}
/*
* the expected number of CR was found until the end of the IVM
* content --> fill string
*/
if (addr < INVENTORYDATASIZE) {
/* Copy the IVM string in the corresponding string */
for (; (buf[addr] != '\r') &&
((buf[addr] != ';') || (!stop)) &&
(size < (maxlen - 1) &&
(addr < INVENTORYDATASIZE)); addr++)
{
size += sprintf((char *)string + size, "%c",
convert_char (buf[addr]));
}
/*
* copy phase is done: check if everything is ok. If not,
* the inventory data is most probably corrupted: tell
* the world there is a problem!
*/
if (addr == INVENTORYDATASIZE) {
xcode = -1;
printf("Error end of string not found\n");
} else if ((size >= (maxlen - 1)) &&
(buf[addr] != '\r')) {
xcode = -1;
printf("string too long till next CR\n");
}
} else {
/*
* some CR are missing...
* the inventory data is most probably corrupted
*/
xcode = -1;
printf("not enough cr found\n");
}
return xcode;
}
#define GET_STRING(name, which, len) \
if (ivm_findinventorystring(which, valbuf, len, buf) == 0) { \
ivm_set_value(name, (char *)valbuf); \
}
static int ivm_check_crc(unsigned char *buf, int block)
{
unsigned long crc;
unsigned long crceeprom;
crc = ivm_calc_crc(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2);
crceeprom = (buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 1] + \
buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN - 2] * 256);
if (crc != crceeprom) {
if (block == 0)
printf("Error CRC Block: %d EEprom: calculated: \
%lx EEprom: %lx\n", block, crc, crceeprom);
return -1;
}
return 0;
}
static int ivm_analyze_block2(unsigned char *buf, int len)
{
unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
unsigned long count;
/* IVM_MacAddress */
sprintf((char *)valbuf, "%pM", buf);
ivm_set_value("IVM_MacAddress", (char *)valbuf);
/* if an offset is defined, add it */
#if defined(CONFIG_PIGGY_MAC_ADRESS_OFFSET)
if (CONFIG_PIGGY_MAC_ADRESS_OFFSET > 0) {
unsigned long val = (buf[4] << 16) + (buf[5] << 8) + buf[6];
val += CONFIG_PIGGY_MAC_ADRESS_OFFSET;
buf[4] = (val >> 16) & 0xff;
buf[5] = (val >> 8) & 0xff;
buf[6] = val & 0xff;
sprintf((char *)valbuf, "%pM", buf);
}
#endif
if (getenv("ethaddr") == NULL)
setenv((char *)"ethaddr", (char *)valbuf);
/* IVM_MacCount */
count = (buf[10] << 24) +
(buf[11] << 16) +
(buf[12] << 8) +
buf[13];
if (count == 0xffffffff)
count = 1;
sprintf((char *)valbuf, "%lx", count);
ivm_set_value("IVM_MacCount", (char *)valbuf);
return 0;
}
int ivm_analyze_eeprom(unsigned char *buf, int len)
{
unsigned short val;
unsigned char valbuf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN];
unsigned char *tmp;
if (ivm_check_crc(buf, 0) != 0)
return -1;
ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
"IVM_BoardId", 0, 1);
val = ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
"IVM_HWKey", 6, 1);
if (val != 0xffff) {
sprintf((char *)valbuf, "%x", ((val / 100) % 10));
ivm_set_value("IVM_HWVariant", (char *)valbuf);
sprintf((char *)valbuf, "%x", (val % 100));
ivm_set_value("IVM_HWVersion", (char *)valbuf);
}
ivm_get_value(buf, CONFIG_SYS_IVM_EEPROM_PAGE_LEN,
"IVM_Functions", 12, 0);
GET_STRING("IVM_Symbol", IVM_POS_SYMBOL_ONLY, 8)
GET_STRING("IVM_DeviceName", IVM_POS_SHORT_TEXT, 64)
tmp = (unsigned char *) getenv("IVM_DeviceName");
if (tmp) {
int len = strlen((char *)tmp);
int i = 0;
while (i < len) {
if (tmp[i] == ';') {
ivm_set_value("IVM_ShortText",
(char *)&tmp[i + 1]);
break;
}
i++;
}
if (i >= len)
ivm_set_value("IVM_ShortText", NULL);
} else {
ivm_set_value("IVM_ShortText", NULL);
}
GET_STRING("IVM_ManufacturerID", IVM_POS_MANU_ID, 32)
GET_STRING("IVM_ManufacturerSerialNumber", IVM_POS_MANU_SERIAL, 20)
GET_STRING("IVM_ManufacturerPartNumber", IVM_POS_PART_NUMBER, 32)
GET_STRING("IVM_ManufacturerBuildState", IVM_POS_BUILD_STATE, 32)
GET_STRING("IVM_SupplierPartNumber", IVM_POS_SUPPLIER_PART_NUMBER, 32)
GET_STRING("IVM_DelieveryDate", IVM_POS_DELIVERY_DATE, 32)
GET_STRING("IVM_SupplierBuildState", IVM_POS_SUPPLIER_BUILD_STATE, 32)
GET_STRING("IVM_CustomerID", IVM_POS_CUSTOMER_ID, 32)
GET_STRING("IVM_CustomerProductID", IVM_POS_CUSTOMER_PROD_ID, 32)
if (ivm_check_crc(&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], 2) != 0)
return 0;
ivm_analyze_block2(&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2],
CONFIG_SYS_IVM_EEPROM_PAGE_LEN);
return 0;
}
int ivm_read_eeprom(void)
{
#if defined(CONFIG_I2C_MUX)
I2C_MUX_DEVICE *dev = NULL;
#endif
uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN];
uchar *buf;
unsigned dev_addr = CONFIG_SYS_IVM_EEPROM_ADR;
int ret;
#if defined(CONFIG_I2C_MUX)
/* First init the Bus, select the Bus */
#if defined(CONFIG_SYS_I2C_IVM_BUS)
dev = i2c_mux_ident_muxstring((uchar *)CONFIG_SYS_I2C_IVM_BUS);
#else
buf = (unsigned char *) getenv("EEprom_ivm");
if (buf != NULL)
dev = i2c_mux_ident_muxstring(buf);
#endif
if (dev == NULL) {
printf("Error couldnt add Bus for IVM\n");
return -1;
}
i2c_set_bus_num(dev->busid);
#endif
buf = (unsigned char *) getenv("EEprom_ivm_addr");
if (buf != NULL)
dev_addr = simple_strtoul((char *)buf, NULL, 16);
/* add deblocking here */
i2c_make_abort();
ret = i2c_read(dev_addr, 0, 1, i2c_buffer,
CONFIG_SYS_IVM_EEPROM_MAX_LEN);
if (ret != 0) {
printf ("Error reading EEprom\n");
return -2;
}
return ivm_analyze_eeprom(i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN);
}
#if defined(CONFIG_SYS_I2C_INIT_BOARD)
#define DELAY_ABORT_SEQ 62 /* @200kHz 9 clocks = 44us, 62us is ok */
#define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000))
#if defined(CONFIG_KM_82XX)
#define SDA_MASK 0x00010000
#define SCL_MASK 0x00020000
void set_pin(int state, unsigned long mask)
{
ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3);
if (state)
setbits_be32(&iop->pdat, mask);
else
clrbits_be32(&iop->pdat, mask);
setbits_be32(&iop->pdir, mask);
}
static int get_pin(unsigned long mask)
{
ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3);
clrbits_be32(&iop->pdir, mask);
return 0 != (in_be32(&iop->pdat) & mask);
}
static void set_sda(int state)
{
set_pin(state, SDA_MASK);
}
static void set_scl(int state)
{
set_pin(state, SCL_MASK);
}
static int get_sda(void)
{
return get_pin(SDA_MASK);
}
static int get_scl(void)
{
return get_pin(SCL_MASK);
}
#if defined(CONFIG_HARD_I2C)
static void setports(int gpio)
{
ioport_t *iop = ioport_addr((immap_t *)CONFIG_SYS_IMMR, 3);
if (gpio) {
clrbits_be32(&iop->ppar, (SDA_MASK | SCL_MASK));
clrbits_be32(&iop->podr, (SDA_MASK | SCL_MASK));
} else {
setbits_be32(&iop->ppar, (SDA_MASK | SCL_MASK));
clrbits_be32(&iop->pdir, (SDA_MASK | SCL_MASK));
setbits_be32(&iop->podr, (SDA_MASK | SCL_MASK));
}
}
#endif
#endif
#if !defined(CONFIG_MPC83xx)
static void i2c_write_start_seq(void)
{
set_sda(1);
udelay(DELAY_HALF_PERIOD);
set_scl(1);
udelay(DELAY_HALF_PERIOD);
set_sda(0);
udelay(DELAY_HALF_PERIOD);
set_scl(0);
udelay(DELAY_HALF_PERIOD);
}
/*
* I2C is a synchronous protocol and resets of the processor in the middle
* of an access can block the I2C Bus until a powerdown of the full unit is
* done. This function toggles the SCL until the SCL and SCA line are
* released, but max. 16 times, after this a I2C start-sequence is sent.
* This I2C Deblocking mechanism was developed by Keymile in association
* with Anatech and Atmel in 1998.
*/
static int i2c_make_abort(void)
{
#if defined(CONFIG_HARD_I2C) && !defined(MACH_TYPE_KM_KIRKWOOD)
immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
/*
* disable I2C controller first, otherwhise it thinks we want to
* talk to the slave port...
*/
clrbits_8(&i2c->i2c_i2mod, 0x01);
/* Set the PortPins to GPIO */
setports(1);
#endif
int scl_state = 0;
int sda_state = 0;
int i = 0;
int ret = 0;
if (!get_sda()) {
ret = -1;
while (i < 16) {
i++;
set_scl(0);
udelay(DELAY_ABORT_SEQ);
set_scl(1);
udelay(DELAY_ABORT_SEQ);
scl_state = get_scl();
sda_state = get_sda();
if (scl_state && sda_state) {
ret = 0;
break;
}
}
}
if (ret == 0)
for (i = 0; i < 5; i++)
i2c_write_start_seq();
/* respect stop setup time */
udelay(DELAY_ABORT_SEQ);
set_scl(1);
udelay(DELAY_ABORT_SEQ);
set_sda(1);
get_sda();
#if defined(CONFIG_HARD_I2C)
/* Set the PortPins back to use for I2C */
setports(0);
#endif
return ret;
}
#endif
#if defined(CONFIG_MPC83xx)
static void i2c_write_start_seq(void)
{
struct fsl_i2c *dev;
dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET);
udelay(DELAY_ABORT_SEQ);
out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA));
udelay(DELAY_ABORT_SEQ);
out_8(&dev->cr, (I2C_CR_MEN));
}
static int i2c_make_abort(void)
{
struct fsl_i2c *dev;
dev = (struct fsl_i2c *) (CONFIG_SYS_IMMR + CONFIG_SYS_I2C_OFFSET);
uchar dummy;
uchar last;
int nbr_read = 0;
int i = 0;
int ret = 0;
/* wait after each operation to finsh with a delay */
out_8(&dev->cr, (I2C_CR_MSTA));
udelay(DELAY_ABORT_SEQ);
out_8(&dev->cr, (I2C_CR_MEN | I2C_CR_MSTA));
udelay(DELAY_ABORT_SEQ);
dummy = in_8(&dev->dr);
udelay(DELAY_ABORT_SEQ);
last = in_8(&dev->dr);
nbr_read++;
/*
* do read until the last bit is 1, but stop if the full eeprom is
* read.
*/
while (((last & 0x01) != 0x01) &&
(nbr_read < CONFIG_SYS_IVM_EEPROM_MAX_LEN)) {
udelay(DELAY_ABORT_SEQ);
last = in_8(&dev->dr);
nbr_read++;
}
if ((last & 0x01) != 0x01)
ret = -2;
if ((last != 0xff) || (nbr_read > 1))
printf("[INFO] i2c abort after %d bytes (0x%02x)\n",
nbr_read, last);
udelay(DELAY_ABORT_SEQ);
out_8(&dev->cr, (I2C_CR_MEN));
udelay(DELAY_ABORT_SEQ);
/* clear status reg */
out_8(&dev->sr, 0);
for (i = 0; i < 5; i++)
i2c_write_start_seq();
if (ret != 0)
printf("[ERROR] i2c abort failed after %d bytes (0x%02x)\n",
nbr_read, last);
return ret;
}
#endif
/**
* i2c_init_board - reset i2c bus. When the board is powercycled during a
* bus transfer it might hang; for details see doc/I2C_Edge_Conditions.
*/
void i2c_init_board(void)
{
/* Now run the AbortSequence() */
i2c_make_abort();
}
#endif
#endif
#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
int fdt_set_node_and_value(void *blob,
char *nodename,
char *regname,
void *var,
int size)
{
int ret = 0;
int nodeoffset = 0;
nodeoffset = fdt_path_offset(blob, nodename);
if (nodeoffset >= 0) {
ret = fdt_setprop(blob, nodeoffset, regname, var,
size);
if (ret < 0)
printf("ft_blob_update(): cannot set %s/%s "
"property err:%s\n", nodename, regname,
fdt_strerror(ret));
} else {
printf("ft_blob_update(): cannot find %s node "
"err:%s\n", nodename, fdt_strerror(nodeoffset));
}
return ret;
}
int fdt_get_node_and_value(void *blob,
char *nodename,
char *propname,
void **var)
{
int len;
int nodeoffset = 0;
nodeoffset = fdt_path_offset(blob, nodename);
if (nodeoffset >= 0) {
*var = (void *)fdt_getprop(blob, nodeoffset, propname, &len);
if (len == 0) {
/* no value */
printf("%s no value\n", __func__);
return -1;
} else if (len > 0) {
return len;
} else {
printf("libfdt fdt_getprop(): %s\n",
fdt_strerror(len));
return -2;
}
} else {
printf("%s: cannot find %s node err:%s\n", __func__,
nodename, fdt_strerror(nodeoffset));
return -3;
}
}
#endif
#if !defined(MACH_TYPE_KM_KIRKWOOD)
int ethernet_present(void)
{
struct km_bec_fpga *base =
(struct km_bec_fpga *)CONFIG_SYS_KMBEC_FPGA_BASE;
return in_8(&base->bprth) & PIGGY_PRESENT;
}
#endif
int board_eth_init(bd_t *bis)
{
if (ethernet_present())
return cpu_eth_init(bis);
return -1;
}
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