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-rw-r--r--board/keymile/common/common.c523
1 files changed, 523 insertions, 0 deletions
diff --git a/board/keymile/common/common.c b/board/keymile/common/common.c
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+++ b/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>
+#include <mpc8260.h>
+#include <ioports.h>
+#include <malloc.h>
+#include <hush.h>
+
+#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
+#include <libfdt.h>
+#endif
+
+#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
+#include <i2c.h>
+#endif
+#include <asm/io.h>
+
+extern int i2c_soft_read_pin (void);
+
+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;
+}
+
+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", __FUNCTION__, 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 INVENTORYBLOCKSIZE 0x100
+#define INVENTORYDATAADDRESS 0x21
+#define INVENTORYDATASIZE (INVENTORYBLOCKSIZE - INVENTORYDATAADDRESS - 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 = INVENTORYDATAADDRESS;
+ 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) {
+ 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, "%02X:%02X:%02X:%02X:%02X:%02X",
+ buf[1],
+ buf[2],
+ buf[3],
+ buf[4],
+ buf[5],
+ buf[6]);
+ ivm_set_value ("IVM_MacAddress", (char *)valbuf);
+ 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 -2;
+ ivm_analyze_block2 (&buf[CONFIG_SYS_IVM_EEPROM_PAGE_LEN * 2], CONFIG_SYS_IVM_EEPROM_PAGE_LEN);
+
+ return 0;
+}
+
+int ivm_read_eeprom (void)
+{
+ I2C_MUX_DEVICE *dev = NULL;
+ uchar i2c_buffer[CONFIG_SYS_IVM_EEPROM_MAX_LEN];
+ uchar *buf;
+ unsigned dev_addr = CONFIG_SYS_IVM_EEPROM_ADR;
+
+ /* 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);
+
+ buf = (unsigned char *) getenv ("EEprom_ivm_addr");
+ if (buf != NULL)
+ dev_addr = simple_strtoul ((char *)buf, NULL, 16);
+
+ if (eeprom_read (dev_addr, 0, i2c_buffer, CONFIG_SYS_IVM_EEPROM_MAX_LEN) != 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
+#define DELAY_HALF_PERIOD (500 / (CONFIG_SYS_I2C_SPEED / 1000))
+
+#if defined(CONFIG_MGCOGE)
+#define SDA_MASK 0x00010000
+#define SCL_MASK 0x00020000
+static void set_pin (int state, unsigned long mask)
+{
+ volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
+
+ if (state)
+ iop->pdat |= (mask);
+ else
+ iop->pdat &= ~(mask);
+
+ iop->pdir |= (mask);
+}
+
+static int get_pin (unsigned long mask)
+{
+ volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
+
+ iop->pdir &= ~(mask);
+ return (0 != (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)
+{
+ volatile ioport_t *iop = ioport_addr ((immap_t *)CONFIG_SYS_IMMR, 3);
+
+ if (gpio) {
+ iop->ppar &= ~(SDA_MASK | SCL_MASK);
+ iop->podr &= ~(SDA_MASK | SCL_MASK);
+ } else {
+ iop->ppar |= (SDA_MASK | SCL_MASK);
+ iop->pdir &= ~(SDA_MASK | SCL_MASK);
+ iop->podr |= (SDA_MASK | SCL_MASK);
+ }
+}
+#endif
+#endif
+
+#if defined(CONFIG_MGSUVD)
+static void set_sda (int state)
+{
+ I2C_SDA(state);
+}
+
+static void set_scl (int state)
+{
+ I2C_SCL(state);
+}
+
+static int get_sda (void)
+{
+ return I2C_READ;
+}
+
+static int get_scl (void)
+{
+ int val;
+
+ *(unsigned short *)(I2C_BASE_DIR) &= ~SCL_CONF;
+ udelay (1);
+ val = *(unsigned char *)(I2C_BASE_PORT);
+
+ return ((val & SCL_BIT) == SCL_BIT);
+}
+
+#endif
+
+static void writeStartSeq (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)
+{
+ 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++) {
+ writeStartSeq ();
+ }
+ }
+ get_sda ();
+ return ret;
+}
+
+/**
+ * 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)
+{
+#if defined(CONFIG_HARD_I2C)
+ volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR ;
+ volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
+
+ /* disable I2C controller first, otherwhise it thinks we want to */
+ /* talk to the slave port... */
+ i2c->i2c_i2mod &= ~0x01;
+
+ /* Set the PortPins to GPIO */
+ setports (1);
+#endif
+
+ /* Now run the AbortSequence() */
+ i2c_make_abort ();
+
+#if defined(CONFIG_HARD_I2C)
+ /* Set the PortPins back to use for I2C */
+ setports (0);
+#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;
+}
+#endif
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