--- /dev/null
+/*
+ * (C) Copyright 2001
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <mpc8xx.h>
+#include <flash.h>
+
+flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+ulong flash_recognize (vu_long *base);
+int write_word (flash_info_t *info, ulong dest, ulong data);
+void flash_get_geometry (vu_long *base, flash_info_t *info);
+void flash_unprotect(flash_info_t *info);
+int _flash_real_protect(flash_info_t *info, long idx, int on);
+
+
+unsigned long flash_init (void)
+{
+ volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
+ volatile memctl8xx_t *memctl = &immap->im_memctl;
+ int i;
+ int rec;
+
+ for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ }
+
+ *((vu_short*)CONFIG_SYS_FLASH_BASE) = 0xffff;
+
+ flash_get_geometry ((vu_long*)CONFIG_SYS_FLASH_BASE, &flash_info[0]);
+
+ /* Remap FLASH according to real size */
+ memctl->memc_or0 = CONFIG_SYS_OR_TIMING_FLASH | (-flash_info[0].size & 0xFFFF8000);
+ memctl->memc_br0 = (CONFIG_SYS_FLASH_BASE & BR_BA_MSK) |
+ (memctl->memc_br0 & ~(BR_BA_MSK));
+
+ rec = flash_recognize((vu_long*)CONFIG_SYS_FLASH_BASE);
+
+ if (rec == FLASH_UNKNOWN) {
+ printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
+ flash_info[0].size, flash_info[0].size<<20);
+ }
+
+#if CONFIG_SYS_FLASH_PROTECTION
+ /*Unprotect all the flash memory*/
+ flash_unprotect(&flash_info[0]);
+#endif
+
+ *((vu_short*)CONFIG_SYS_FLASH_BASE) = 0xffff;
+
+ return (flash_info[0].size);
+
+#if CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE
+ /* monitor protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CONFIG_SYS_MONITOR_BASE,
+ CONFIG_SYS_MONITOR_BASE+monitor_flash_len-1,
+ &flash_info[0]);
+#endif
+
+#ifdef CONFIG_ENV_IS_IN_FLASH
+ /* ENV protection ON by default */
+ flash_protect(FLAG_PROTECT_SET,
+ CONFIG_ENV_OFFSET,
+ CONFIG_ENV_OFFSET+CONFIG_ENV_SIZE-1,
+ &flash_info[0]);
+#endif
+ return (flash_info[0].size);
+}
+
+
+int flash_get_protect_status(flash_info_t * info, long idx)
+{
+ vu_short * base;
+ ushort res;
+
+#ifdef DEBUG
+ printf("\n Attempting to set protection info with %d sectors\n", info->sector_count);
+#endif
+
+
+ base = (vu_short*)info->start[idx];
+
+ *(base) = 0xffff;
+
+ *(base + 0x55) = 0x0098;
+ res = base[0x2];
+
+ *(base) = 0xffff;
+
+ if(res != 0)
+ res = 1;
+ else
+ res = 0;
+
+ return res;
+}
+
+void flash_get_geometry (vu_long *base, flash_info_t *info)
+{
+ int i,j;
+ ulong ner = 0;
+ vu_short * sb = (vu_short*)base;
+ ulong offset = (ulong)base;
+
+ /* Read Device geometry */
+
+ *sb = 0xffff;
+
+ *sb = 0x0090;
+
+ info->flash_id = ((ulong)base[0x0]);
+#ifdef DEBUG
+ printf("Id is %x\n", (uint)(ulong)info->flash_id);
+#endif
+
+ *sb = 0xffff;
+
+ *(sb+0x55) = 0x0098;
+
+ info->size = 1 << (sb[0x27]); /* Read flash size */
+
+#ifdef DEBUG
+ printf("Size is %x\n", (uint)(ulong)info->size);
+#endif
+
+ *sb = 0xffff;
+
+ *(sb + 0x55) = 0x0098;
+ ner = sb[0x2c] ; /*Number of erase regions*/
+
+#ifdef DEBUG
+ printf("Number of erase regions %x\n", (uint)ner);
+#endif
+
+ info->sector_count = 0;
+
+ for(i = 0; i < ner; i++)
+ {
+ uint s;
+ uint count;
+ uint t1,t2,t3,t4;
+
+ *sb = 0xffff;
+
+ *(sb + 0x55) = 0x0098;
+
+ t1 = sb[0x2d + i*4];
+ t2 = sb[0x2e + i*4];
+ t3 = sb[0x2f + i*4];
+ t4 = sb[0x30 + i*4];
+
+ count = ((t1 & 0x00ff) | (((t2 & 0x00ff) << 8) & 0xff00) )+ 1; /*sector count*/
+ s = ((t3 & 0x00ff) | (((t4 & 0x00ff) << 8) & 0xff00)) * 256;; /*Sector size*/
+
+#ifdef DEBUG
+ printf("count and size %x, %x\n", count, s);
+ printf("sector count for erase region %d is %d\n", i, count);
+#endif
+ for(j = 0; j < count; j++)
+ {
+#ifdef DEBUG
+ printf("%x, ", (uint)offset);
+#endif
+ info->start[ info->sector_count + j] = offset;
+ offset += s;
+ }
+ info->sector_count += count;
+ }
+
+ if ((offset - (ulong)base) != info->size)
+ printf("WARNING reported size %x does not match to calculted size %x.\n"
+ , (uint)info->size, (uint)(offset - (ulong)base) );
+
+ /* Next check if there are any sectors protected.*/
+
+ for(i = 0; i < info->sector_count; i++)
+ info->protect[i] = flash_get_protect_status(info, i);
+
+ *sb = 0xffff;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info (flash_info_t *info)
+{
+ int i;
+
+ if (info->flash_id == FLASH_UNKNOWN) {
+ printf ("missing or unknown FLASH type\n");
+ return ;
+ }
+
+ switch (info->flash_id & FLASH_VENDMASK) {
+ case INTEL_MANUFACT & FLASH_VENDMASK:
+ printf ("Intel ");
+ break;
+ default:
+ printf ("Unknown Vendor ");
+ break;
+ }
+
+ switch (info->flash_id & FLASH_TYPEMASK) {
+ case INTEL_ID_28F320C3B & FLASH_TYPEMASK:
+ printf ("28F320RC3(4 MB)\n");
+ break;
+ case INTEL_ID_28F320J3A:
+ printf("28F320J3A (4 MB)\n");
+ break;
+ default:
+ printf ("Unknown Chip Type\n");
+ break;
+ }
+
+ printf (" Size: %ld MB in %d Sectors\n",
+ info->size >> 20, info->sector_count);
+
+ printf (" Sector Start Addresses:");
+ for (i=0; i<info->sector_count; ++i) {
+ if ((i % 4) == 0)
+ printf ("\n ");
+ printf (" %02d %08lX%s",
+ i, info->start[i],
+ info->protect[i]!=0 ? " (RO)" : " "
+ );
+ }
+ printf ("\n");
+ return ;
+}
+
+ulong flash_recognize (vu_long *base)
+{
+ ulong id;
+ ulong res = FLASH_UNKNOWN;
+ vu_short * sb = (vu_short*)base;
+
+ *sb = 0xffff;
+
+ *sb = 0x0090;
+ id = base[0];
+
+ switch (id & 0x00FF0000)
+ {
+ case (MT_MANUFACT & 0x00FF0000): /* MT or => Intel */
+ case (INTEL_ALT_MANU & 0x00FF0000):
+ res = FLASH_MAN_INTEL;
+ break;
+ default:
+ res = FLASH_UNKNOWN;
+ }
+
+ *sb = 0xffff;
+
+ return res;
+}
+
+/*-----------------------------------------------------------------------*/
+#define INTEL_FLASH_STATUS_BLS 0x02
+#define INTEL_FLASH_STATUS_PSS 0x04
+#define INTEL_FLASH_STATUS_VPPS 0x08
+#define INTEL_FLASH_STATUS_PS 0x10
+#define INTEL_FLASH_STATUS_ES 0x20
+#define INTEL_FLASH_STATUS_ESS 0x40
+#define INTEL_FLASH_STATUS_WSMS 0x80
+
+int flash_decode_status_bits(char status)
+{
+ int err = 0;
+
+ if(!(status & INTEL_FLASH_STATUS_WSMS)) {
+ printf("Busy\n");
+ err = -1;
+ }
+
+ if(status & INTEL_FLASH_STATUS_ESS) {
+ printf("Erase suspended\n");
+ err = -1;
+ }
+
+ if(status & INTEL_FLASH_STATUS_ES) {
+ printf("Error in block erase\n");
+ err = -1;
+ }
+
+ if(status & INTEL_FLASH_STATUS_PS) {
+ printf("Error in programming\n");
+ err = -1;
+ }
+
+ if(status & INTEL_FLASH_STATUS_VPPS) {
+ printf("Vpp low, operation aborted\n");
+ err = -1;
+ }
+
+ if(status & INTEL_FLASH_STATUS_PSS) {
+ printf("Program is suspended\n");
+ err = -1;
+ }
+
+ if(status & INTEL_FLASH_STATUS_BLS) {
+ printf("Attempting to program/erase a locked sector\n");
+ err = -1;
+ }
+
+ if((status & INTEL_FLASH_STATUS_PS) &&
+ (status & INTEL_FLASH_STATUS_ES) &&
+ (status & INTEL_FLASH_STATUS_ESS)) {
+ printf("A command sequence error\n");
+ return -1;
+ }
+
+ return err;
+}
+
+/*-----------------------------------------------------------------------
+ */
+
+int flash_erase (flash_info_t *info, int s_first, int s_last)
+{
+ vu_short *addr;
+ int flag, prot, sect;
+ ulong start, now;
+ int rcode = 0;
+
+ 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;
+ }
+
+ if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK)) {
+ printf ("Can't erase unknown flash type %08lx - aborted\n",
+ info->flash_id);
+ return 1;
+ }
+
+ prot = 0;
+ for (sect=s_first; sect<=s_last; ++sect) {
+ if (info->protect[sect]) {
+ prot++;
+ }
+ }
+
+ if (prot) {
+ printf ("- Warning: %d protected sectors will not be erased!\n",
+ prot);
+ } else {
+ printf ("\n");
+ }
+
+ start = get_timer (0);
+
+ /* Start erase on unprotected sectors */
+ for (sect = s_first; sect<=s_last; sect++) {
+ char tmp;
+
+ if (info->protect[sect] == 0) { /* not protected */
+ addr = (vu_short *)(info->start[sect]);
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ /* Single Block Erase Command */
+ *addr = 0x0020;
+ /* Confirm */
+ *addr = 0x00D0;
+ /* Resume Command, as per errata update */
+ *addr = 0x00D0;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ *addr = 0x70; /*Read status register command*/
+ tmp = (short)*addr & 0x00FF; /* Read the status */
+ while (!(tmp & INTEL_FLASH_STATUS_WSMS)) {
+ if ((now=get_timer(start)) > CONFIG_SYS_FLASH_ERASE_TOUT) {
+ *addr = 0x0050; /* Reset the status register */
+ *addr = 0xffff;
+ printf ("Timeout\n");
+ return 1;
+ }
+ /* show that we're waiting */
+ if ((now - start) > 1000) { /* every second */
+ putc ('.');
+ }
+ udelay(100000); /* 100 ms */
+ *addr = 0x0070; /*Read status register command*/
+ tmp = (short)*addr & 0x00FF; /* Read status */
+ start = get_timer(0);
+ }
+ if( tmp & INTEL_FLASH_STATUS_ES )
+ flash_decode_status_bits(tmp);
+
+ *addr = 0x0050; /* Reset the status register */
+ *addr = 0xffff; /* Reset to read mode */
+ }
+ }
+
+
+ printf (" done\n");
+ return rcode;
+}
+
+void flash_unprotect (flash_info_t *info)
+{
+ /*We can only unprotect the whole flash at once*/
+ /*Therefore we must prevent the _flash_real_protect()*/
+ /*from re-protecting sectors, that ware protected before */
+ /*we called flash_real_protect();*/
+
+ int i;
+
+ for(i = 0; i < info->sector_count; i++)
+ info->protect[i] = 0;
+
+#ifdef CONFIG_SYS_FLASH_PROTECTION
+ _flash_real_protect(info, 0, 0);
+#endif
+}
+
+/*-----------------------------------------------------------------------
+ * Copy memory to flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+
+int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
+{
+ ulong cp, wp, data;
+ int i, l, rc;
+
+ wp = (addr & ~3); /* get lower word aligned address */
+
+ /*
+ * handle unaligned start bytes
+ */
+ if ((l = addr - wp) != 0) {
+ data = 0;
+ for (i=0, cp=wp; i<l; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+ for (; i<4 && cnt>0; ++i) {
+ data = (data << 8) | *src++;
+ --cnt;
+ ++cp;
+ }
+ for (; cnt==0 && i<4; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 4;
+ }
+
+ /*
+ * handle word aligned part
+ */
+ while (cnt >= 4) {
+ data = 0;
+ for (i=0; i<4; ++i) {
+ data = (data << 8) | *src++;
+ }
+ if ((rc = write_word(info, wp, data)) != 0) {
+ return (rc);
+ }
+ wp += 4;
+ cnt -= 4;
+ }
+
+ if (cnt == 0) {
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ data = 0;
+ for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) {
+ data = (data << 8) | *src++;
+ --cnt;
+ }
+ for (; i<4; ++i, ++cp) {
+ data = (data << 8) | (*(uchar *)cp);
+ }
+
+ return (write_word(info, wp, data));
+}
+
+/*-----------------------------------------------------------------------
+ * Write a word to Flash, returns:
+ * 0 - OK
+ * 1 - write timeout
+ * 2 - Flash not erased
+ */
+int write_word (flash_info_t *info, ulong dest, ulong da)
+{
+ vu_short *addr = (vu_short *)dest;
+ ulong start;
+ char csr;
+ int flag;
+ int i;
+ union {
+ u32 data32;
+ u16 data16[2];
+ } data;
+
+ data.data32 = da;
+
+ /* Check if Flash is (sufficiently) erased */
+ if (((*addr & data.data16[0]) != data.data16[0]) ||
+ ((*(addr+1) & data.data16[1]) != data.data16[1])) {
+ return (2);
+ }
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ for(i = 0; i < 2; i++)
+ {
+ /* Write Command */
+ *addr = 0x0010;
+
+ /* Write Data */
+ *addr = data.data16[i];
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ /* data polling for D7 */
+ start = get_timer (0);
+ flag = 0;
+ *addr = 0x0070; /*Read statusregister command */
+ while (((csr = *addr) & INTEL_FLASH_STATUS_WSMS)!=INTEL_FLASH_STATUS_WSMS) {
+ if (get_timer(start) > CONFIG_SYS_FLASH_WRITE_TOUT) {
+ flag = 1;
+ break;
+ }
+ *addr = 0x0070; /*Read statusregister command */
+ }
+ if (csr & INTEL_FLASH_STATUS_PSS) {
+ printf ("CSR indicates write error (%0x) at %08lx\n",
+ csr, (ulong)addr);
+ flag = 1;
+ }
+
+ /* Clear Status Registers Command */
+ *addr = 0x0050;
+ /* Reset to read array mode */
+ *addr = 0xffff;
+ addr++;
+ }
+
+ return (flag);
+}
+
+int flash_real_protect(flash_info_t *info, long offset, int prot)
+{
+ int i, idx;
+
+ for(idx = 0; idx < info->sector_count; idx++)
+ if(info->start[idx] == offset)
+ break;
+
+ if(idx==info->sector_count)
+ return -1;
+
+ if(prot == 0) {
+ /* Unprotect one sector, which means unprotect all flash
+ * and reprotect the other protected sectors.
+ */
+ _flash_real_protect(info, 0, 0); /* Unprotects the whole flash*/
+ info->protect[idx] = 0;
+
+ for(i = 0; i < info->sector_count; i++)
+ if(info->protect[i])
+ _flash_real_protect(info, i, 1);
+ }
+ else {
+ /* We can protect individual sectors */
+ _flash_real_protect(info, idx, 1);
+ }
+
+ for( i = 0; i < info->sector_count; i++)
+ info->protect[i] = flash_get_protect_status(info, i);
+
+ return 0;
+}
+
+int _flash_real_protect(flash_info_t *info, long idx, int prot)
+{
+ vu_short *addr;
+ int flag;
+ ushort cmd;
+ ushort tmp;
+ ulong now, start;
+
+ if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK)) {
+ printf ("Can't change protection for unknown flash type %08lx - aborted\n",
+ info->flash_id);
+ return -1;
+ }
+
+ if(prot == 0) {
+ /*Unlock the sector*/
+ cmd = 0x00D0;
+ }
+ else {
+ /*Lock the sector*/
+ cmd = 0x0001;
+ }
+
+ addr = (vu_short *)(info->start[idx]);
+
+ /* If chip is busy, wait for it */
+ start = get_timer(0);
+ *addr = 0x0070; /*Read status register command*/
+ tmp = ((ushort)(*addr))&0x00ff; /*Read the status*/
+ while(!(tmp & INTEL_FLASH_STATUS_WSMS)) {
+ /*Write State Machine Busy*/
+ /*Wait untill done or timeout.*/
+ if ((now=get_timer(start)) > CONFIG_SYS_FLASH_WRITE_TOUT) {
+ *addr = 0x0050; /* Reset the status register */
+ *addr = 0xffff; /* Reset the chip */
+ printf ("TTimeout\n");
+ return 1;
+ }
+ *addr = 0x0070;
+ tmp = ((ushort)(*addr))&0x00ff; /*Read the status*/
+ start = get_timer(0);
+ }
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ /* Unlock block*/
+ *addr = 0x0060;
+
+ *addr = cmd;
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ start = get_timer(0);
+ *addr = 0x0070; /*Read status register command*/
+ tmp = ((ushort)(*addr)) & 0x00FF; /* Read the status */
+ while (!(tmp & INTEL_FLASH_STATUS_WSMS)) {
+ /* Write State Machine Busy */
+ if ((now=get_timer(start)) > CONFIG_SYS_FLASH_WRITE_TOUT) {
+ *addr = 0x0050; /* Reset the status register */
+ *addr = 0xffff;
+ printf ("Timeout\n");
+ return 1;
+ }
+ /* show that we're waiting */
+ if ((now - start) > 1000) { /* every second */
+ putc ('.');
+ }
+ udelay(100000); /* 100 ms */
+ *addr = 0x70; /*Read status register command*/
+ tmp = (short)*addr & 0x00FF; /* Read status */
+ start = get_timer(0);
+ }
+ if( tmp & INTEL_FLASH_STATUS_PS )
+ flash_decode_status_bits(tmp);
+
+ *addr =0x0050; /*Clear status register*/
+
+ /* reset to read mode */
+ *addr = 0xffff;
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff