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authorwdenk <wdenk>2002-08-17 09:36:01 +0000
committerwdenk <wdenk>2002-08-17 09:36:01 +0000
commitaffae2bff825c1a8d2cfeaf7b270188d251d39d2 (patch)
treee025ca5a84cdcd70cff986e09f89e1aaa360499c /board/evb64260
parentcf356ef708390102d493c53d18fd19a5963c6aa9 (diff)
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Initial revision
Diffstat (limited to 'board/evb64260')
-rw-r--r--board/evb64260/i2c.c315
-rw-r--r--board/evb64260/intel_flash.c277
2 files changed, 592 insertions, 0 deletions
diff --git a/board/evb64260/i2c.c b/board/evb64260/i2c.c
new file mode 100644
index 0000000..22cb809
--- /dev/null
+++ b/board/evb64260/i2c.c
@@ -0,0 +1,315 @@
+#include <common.h>
+#include <mpc8xx.h>
+#include <malloc.h>
+#include <galileo/gt64260R.h>
+#include <galileo/core.h>
+
+#define MAX_I2C_RETRYS 10
+#define I2C_DELAY 1000 /* Should be at least the # of MHz of Tclk */
+#undef DEBUG_I2C
+
+#ifdef DEBUG_I2C
+#define DP(x) x
+#else
+#define DP(x)
+#endif
+
+/* Assuming that there is only one master on the bus (us) */
+
+static void
+i2c_init(int speed, int slaveaddr)
+{
+ unsigned int n, m, freq, margin, power;
+ unsigned int actualFreq, actualN=0, actualM=0;
+ unsigned int control, status;
+ unsigned int minMargin = 0xffffffff;
+ unsigned int tclk = 125000000;
+
+ DP(puts("i2c_init\n"));
+
+ for(n = 0 ; n < 8 ; n++)
+ {
+ for(m = 0 ; m < 16 ; m++)
+ {
+ power = 2<<n; /* power = 2^(n+1) */
+ freq = tclk/(10*(m+1)*power);
+ if (speed > freq)
+ margin = speed - freq;
+ else
+ margin = freq - speed;
+ if(margin < minMargin)
+ {
+ minMargin = margin;
+ actualFreq = freq;
+ actualN = n;
+ actualM = m;
+ }
+ }
+ }
+
+ DP(puts("setup i2c bus\n"));
+
+ /* Setup bus */
+
+ GT_REG_WRITE(I2C_SOFT_RESET, 0);
+
+ DP(puts("udelay...\n"));
+
+ udelay(I2C_DELAY);
+
+ DP(puts("set baudrate\n"));
+
+ GT_REG_WRITE(I2C_STATUS_BAUDE_RATE, (actualM << 3) | actualN);
+ GT_REG_WRITE(I2C_CONTROL, (0x1 << 2) | (0x1 << 6));
+
+ udelay(I2C_DELAY * 10);
+
+ DP(puts("read control, baudrate\n"));
+
+ GT_REG_READ(I2C_STATUS_BAUDE_RATE, &status);
+ GT_REG_READ(I2C_CONTROL, &control);
+}
+
+static uchar
+i2c_start(void)
+{
+ unsigned int control, status;
+ int count = 0;
+
+ DP(puts("i2c_start\n"));
+
+ /* Set the start bit */
+
+ GT_REG_READ(I2C_CONTROL, &control);
+ control |= (0x1 << 5);
+ GT_REG_WRITE(I2C_CONTROL, control);
+
+ GT_REG_READ(I2C_STATUS_BAUDE_RATE, &status);
+
+ count = 0;
+ while ((status & 0xff) != 0x08) {
+ udelay(I2C_DELAY);
+ if (count > 20) {
+ GT_REG_WRITE(I2C_CONTROL, (0x1 << 4)); /*stop*/
+ return (status);
+ }
+ GT_REG_READ(I2C_STATUS_BAUDE_RATE, &status);
+ count++;
+ }
+
+ return (0);
+}
+
+static uchar
+i2c_select_device(uchar dev_addr, uchar read, int ten_bit)
+{
+ unsigned int status, data, bits = 7;
+ int count = 0;
+
+ DP(puts("i2c_select_device\n"));
+
+ /* Output slave address */
+
+ if (ten_bit) {
+ bits = 10;
+ }
+
+ data = (dev_addr << 1);
+ /* set the read bit */
+ data |= read;
+ GT_REG_WRITE(I2C_DATA, data);
+ /* assert the address */
+ RESET_REG_BITS(I2C_CONTROL, BIT3);
+
+ udelay(I2C_DELAY);
+
+ GT_REG_READ(I2C_STATUS_BAUDE_RATE, &status);
+ count = 0;
+ while (((status & 0xff) != 0x40) && ((status & 0xff) != 0x18)) {
+ udelay(I2C_DELAY);
+ if (count > 20) {
+ GT_REG_WRITE(I2C_CONTROL, (0x1 << 4)); /*stop*/
+ return(status);
+ }
+ GT_REG_READ(I2C_STATUS_BAUDE_RATE, &status);
+ count++;
+ }
+
+ if (bits == 10) {
+ printf("10 bit I2C addressing not yet implemented\n");
+ return (0xff);
+ }
+
+ return (0);
+}
+
+static uchar
+i2c_get_data(uchar* return_data, int len) {
+
+ unsigned int data, status;
+ int count = 0;
+
+ DP(puts("i2c_get_data\n"));
+
+ while (len) {
+
+ /* Get and return the data */
+
+ RESET_REG_BITS(I2C_CONTROL, (0x1 << 3));
+
+ udelay(I2C_DELAY * 5);
+
+ GT_REG_READ(I2C_STATUS_BAUDE_RATE, &status);
+ count++;
+ while ((status & 0xff) != 0x50) {
+ udelay(I2C_DELAY);
+ if(count > 2) {
+ GT_REG_WRITE(I2C_CONTROL, (0x1 << 4)); /*stop*/
+ return 0;
+ }
+ GT_REG_READ(I2C_STATUS_BAUDE_RATE, &status);
+ count++;
+ }
+ GT_REG_READ(I2C_DATA, &data);
+ len--;
+ *return_data = (uchar)data;
+ return_data++;
+ }
+ RESET_REG_BITS(I2C_CONTROL, BIT2|BIT3);
+ while ((status & 0xff) != 0x58) {
+ udelay(I2C_DELAY);
+ if(count > 200) {
+ GT_REG_WRITE(I2C_CONTROL, (0x1 << 4)); /*stop*/
+ return (status);
+ }
+ GT_REG_READ(I2C_STATUS_BAUDE_RATE, &status);
+ count++;
+ }
+ GT_REG_WRITE(I2C_CONTROL, (0x1 << 4)); /* stop */
+
+ return (0);
+}
+
+static uchar
+i2c_write_data(unsigned int data, int len)
+{
+ unsigned int status;
+ int count = 0;
+
+ DP(puts("i2c_write_data\n"));
+
+ if (len > 4)
+ return -1;
+
+ while (len) {
+ /* Set and assert the data */
+
+ GT_REG_WRITE(I2C_DATA, (unsigned int)data);
+ RESET_REG_BITS(I2C_CONTROL, (0x1 << 3));
+
+ udelay(I2C_DELAY);
+
+ GT_REG_READ(I2C_STATUS_BAUDE_RATE, &status);
+ count++;
+ while ((status & 0xff) != 0x28) {
+ udelay(I2C_DELAY);
+ if(count > 20) {
+ GT_REG_WRITE(I2C_CONTROL, (0x1 << 4)); /*stop*/
+ return (status);
+ }
+ GT_REG_READ(I2C_STATUS_BAUDE_RATE, &status);
+ count++;
+ }
+ len--;
+ }
+ GT_REG_WRITE(I2C_CONTROL, (0x1 << 3) | (0x1 << 4));
+ GT_REG_WRITE(I2C_CONTROL, (0x1 << 4));
+
+ udelay(I2C_DELAY * 10);
+
+ return (0);
+}
+
+static uchar
+i2c_set_dev_offset(uchar dev_addr, unsigned int offset, int ten_bit)
+{
+ uchar status;
+
+ DP(puts("i2c_set_dev_offset\n"));
+
+ status = i2c_select_device(dev_addr, 0, ten_bit);
+ if (status) {
+#ifdef DEBUG_I2C
+ printf("Failed to select device setting offset: 0x%02x\n",
+ status);
+#endif
+ return status;
+ }
+
+ status = i2c_write_data(offset, 1);
+ if (status) {
+#ifdef DEBUG_I2C
+ printf("Failed to write data: 0x%02x\n", status);
+#endif
+ return status;
+ }
+
+ return (0);
+}
+
+uchar
+i2c_read(uchar dev_addr, unsigned int offset, int len, uchar* data,
+ int ten_bit)
+{
+ uchar status = 0;
+ unsigned int i2cFreq = 400000;
+
+ DP(puts("i2c_read\n"));
+
+ i2c_init(i2cFreq,0);
+
+ status = i2c_start();
+
+ if (status) {
+#ifdef DEBUG_I2C
+ printf("Transaction start failed: 0x%02x\n", status);
+#endif
+ return status;
+ }
+
+ status = i2c_set_dev_offset(dev_addr, 0, 0);
+ if (status) {
+#ifdef DEBUG_I2C
+ printf("Failed to set offset: 0x%02x\n", status);
+#endif
+ return status;
+ }
+
+ i2c_init(i2cFreq,0);
+
+ status = i2c_start();
+ if (status) {
+#ifdef DEBUG_I2C
+ printf("Transaction restart failed: 0x%02x\n", status);
+#endif
+ return status;
+ }
+
+ status = i2c_select_device(dev_addr, 1, ten_bit);
+ if (status) {
+#ifdef DEBUG_I2C
+ printf("Address not acknowledged: 0x%02x\n", status);
+#endif
+ return status;
+ }
+
+ status = i2c_get_data(data, len);
+ if (status) {
+#ifdef DEBUG_I2C
+ printf("Data not recieved: 0x%02x\n", status);
+#endif
+ return status;
+ }
+
+ return 0;
+}
diff --git a/board/evb64260/intel_flash.c b/board/evb64260/intel_flash.c
new file mode 100644
index 0000000..ed6a2a0
--- /dev/null
+++ b/board/evb64260/intel_flash.c
@@ -0,0 +1,277 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@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
+ *
+ * Hacked for the Hymod board by Murray.Jensen@cmst.csiro.au, 20-Oct-00
+ */
+
+#include <common.h>
+#include <mpc8xx.h>
+#include <galileo/gt64260R.h>
+#include <galileo/memory.h>
+#include "intel_flash.h"
+
+
+/*-----------------------------------------------------------------------
+ * Protection Flags:
+ */
+#define FLAG_PROTECT_SET 0x01
+#define FLAG_PROTECT_CLEAR 0x02
+
+static void
+bank_reset(flash_info_t *info, int sect)
+{
+ bank_addr_t addrw, eaddrw;
+
+ addrw = (bank_addr_t)info->start[sect];
+ eaddrw = BANK_ADDR_NEXT_WORD(addrw);
+
+ while (addrw < eaddrw) {
+#ifdef FLASH_DEBUG
+ printf(" writing reset cmd to addr 0x%08lx\n",
+ (unsigned long)addrw);
+#endif
+ *addrw = BANK_CMD_RST;
+ addrw++;
+ }
+}
+
+static void
+bank_erase_init(flash_info_t *info, int sect)
+{
+ bank_addr_t addrw, saddrw, eaddrw;
+ int flag;
+
+#ifdef FLASH_DEBUG
+ printf("0x%08x BANK_CMD_PROG\n", BANK_CMD_PROG);
+ printf("0x%08x BANK_CMD_ERASE1\n", BANK_CMD_ERASE1);
+ printf("0x%08x BANK_CMD_ERASE2\n", BANK_CMD_ERASE2);
+ printf("0x%08x BANK_CMD_CLR_STAT\n", BANK_CMD_CLR_STAT);
+ printf("0x%08x BANK_CMD_RST\n", BANK_CMD_RST);
+ printf("0x%08x BANK_STAT_RDY\n", BANK_STAT_RDY);
+ printf("0x%08x BANK_STAT_ERR\n", BANK_STAT_ERR);
+#endif
+
+ saddrw = (bank_addr_t)info->start[sect];
+ eaddrw = BANK_ADDR_NEXT_WORD(saddrw);
+
+#ifdef FLASH_DEBUG
+ printf("erasing sector %d, start addr = 0x%08lx "
+ "(bank next word addr = 0x%08lx)\n", sect,
+ (unsigned long)saddrw, (unsigned long)eaddrw);
+#endif
+
+ /* Disable intrs which might cause a timeout here */
+ flag = disable_interrupts();
+
+ for (addrw = saddrw; addrw < eaddrw; addrw++) {
+#ifdef FLASH_DEBUG
+ printf(" writing erase cmd to addr 0x%08lx\n",
+ (unsigned long)addrw);
+#endif
+ *addrw = BANK_CMD_ERASE1;
+ *addrw = BANK_CMD_ERASE2;
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+}
+
+static int
+bank_erase_poll(flash_info_t *info, int sect)
+{
+ bank_addr_t addrw, saddrw, eaddrw;
+ int sectdone, haderr;
+
+ saddrw = (bank_addr_t)info->start[sect];
+ eaddrw = BANK_ADDR_NEXT_WORD(saddrw);
+
+ sectdone = 1;
+ haderr = 0;
+
+ for (addrw = saddrw; addrw < eaddrw; addrw++) {
+ bank_word_t stat = *addrw;
+
+#ifdef FLASH_DEBUG
+ printf(" checking status at addr "
+ "0x%08x [0x%08x]\n",
+ (unsigned long)addrw, stat);
+#endif
+ if ((stat & BANK_STAT_RDY) != BANK_STAT_RDY)
+ sectdone = 0;
+ else if ((stat & BANK_STAT_ERR) != 0) {
+ printf(" failed on sector %d "
+ "(stat = 0x%08x) at "
+ "address 0x%p\n",
+ sect, stat, addrw);
+ *addrw = BANK_CMD_CLR_STAT;
+ haderr = 1;
+ }
+ }
+
+ if (haderr)
+ return (-1);
+ else
+ return (sectdone);
+}
+
+int
+write_word_intel(bank_addr_t addr, bank_word_t value)
+{
+ bank_word_t stat;
+ ulong start;
+ int flag, retval;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ *addr = BANK_CMD_PROG;
+
+ *addr = value;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ retval = 0;
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ do {
+ if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
+ retval = 1;
+ goto done;
+ }
+ stat = *addr;
+ } while ((stat & BANK_STAT_RDY) != BANK_STAT_RDY);
+
+ if ((stat & BANK_STAT_ERR) != 0) {
+ printf("flash program failed (stat = 0x%08lx) "
+ "at address 0x%08lx\n", (ulong)stat, (ulong)addr);
+ *addr = BANK_CMD_CLR_STAT;
+ retval = 3;
+ }
+
+done:
+ /* reset to read mode */
+ *addr = BANK_CMD_RST;
+
+ return (retval);
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int
+flash_erase_intel(flash_info_t *info, int s_first, int s_last)
+{
+ int prot, sect, haderr;
+ ulong start, now, last;
+
+#ifdef FLASH_DEBUG
+ printf("\nflash_erase: erase %d sectors (%d to %d incl.) from\n"
+ " Bank # %d: ", s_last - s_first + 1, s_first, s_last,
+ (info - flash_info) + 1);
+ flash_print_info(info);
+#endif
+
+ if ((s_first < 0) || (s_first > s_last)) {
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf ("- missing\n");
+ } else {
+ printf ("- no sectors to erase\n");
+ }
+ return 1;
+ }
+
+ prot = 0;
+ for (sect=s_first; sect<=s_last; ++sect) {
+ if (info->protect[sect]) {
+ prot++;
+ }
+ }
+
+ if (prot) {
+ printf("- Warning: %d protected sector%s will not be erased!\n",
+ prot, (prot > 1 ? "s" : ""));
+ }
+
+ start = get_timer (0);
+ last = 0;
+ haderr = 0;
+
+ for (sect = s_first; sect <= s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ ulong estart;
+ int sectdone;
+
+ bank_erase_init(info, sect);
+
+ /* wait at least 80us - let's wait 1 ms */
+ udelay (1000);
+
+ estart = get_timer(start);
+
+ do {
+ now = get_timer(start);
+
+ if (now - estart > CFG_FLASH_ERASE_TOUT) {
+ printf ("Timeout (sect %d)\n", sect);
+ haderr = 1;
+ break;
+ }
+
+#ifndef FLASH_DEBUG
+ /* show that we're waiting */
+ if ((now - last) > 1000) { /* every second */
+ putc ('.');
+ last = now;
+ }
+#endif
+
+ sectdone = bank_erase_poll(info, sect);
+
+ if (sectdone < 0) {
+ haderr = 1;
+ break;
+ }
+
+ } while (!sectdone);
+
+ if (haderr)
+ break;
+ }
+ }
+
+ if (haderr > 0)
+ printf (" failed\n");
+ else
+ printf (" done\n");
+
+ /* reset to read mode */
+ for (sect = s_first; sect <= s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ bank_reset(info, sect);
+ }
+ }
+ return haderr;
+}