--- /dev/null
+/*
+ * (C) Copyright 2002
+ * Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <asm/cache.h>
+
+#undef DEBUG_FLASH
+/*
+ * This file implements a Common Flash Interface (CFI) driver for U-Boot.
+ * The width of the port and the width of the chips are determined at initialization.
+ * These widths are used to calculate the address for access CFI data structures.
+ * It has been tested on an Intel Strataflash implementation.
+ *
+ * References
+ * JEDEC Standard JESD68 - Common Flash Interface (CFI)
+ * JEDEC Standard JEP137-A Common Flash Interface (CFI) ID Codes
+ * Intel Application Note 646 Common Flash Interface (CFI) and Command Sets
+ * Intel 290667-008 3 Volt Intel StrataFlash Memory datasheet
+ *
+ * TODO
+ * Use Primary Extended Query table (PRI) and Alternate Algorithm Query Table (ALT) to determine if protection is available
+ * Add support for other command sets Use the PRI and ALT to determine command set
+ * Verify erase and program timeouts.
+ */
+
+#define FLASH_CMD_CFI 0x98
+#define FLASH_CMD_READ_ID 0x90
+#define FLASH_CMD_RESET 0xff
+#define FLASH_CMD_BLOCK_ERASE 0x20
+#define FLASH_CMD_ERASE_CONFIRM 0xD0
+#define FLASH_CMD_WRITE 0x40
+#define FLASH_CMD_PROTECT 0x60
+#define FLASH_CMD_PROTECT_SET 0x01
+#define FLASH_CMD_PROTECT_CLEAR 0xD0
+#define FLASH_CMD_CLEAR_STATUS 0x50
+#define FLASH_CMD_WRITE_TO_BUFFER 0xE8
+#define FLASH_CMD_WRITE_BUFFER_CONFIRM 0xD0
+
+#define FLASH_STATUS_DONE 0x80
+#define FLASH_STATUS_ESS 0x40
+#define FLASH_STATUS_ECLBS 0x20
+#define FLASH_STATUS_PSLBS 0x10
+#define FLASH_STATUS_VPENS 0x08
+#define FLASH_STATUS_PSS 0x04
+#define FLASH_STATUS_DPS 0x02
+#define FLASH_STATUS_R 0x01
+#define FLASH_STATUS_PROTECT 0x01
+
+#define FLASH_OFFSET_CFI 0x55
+#define FLASH_OFFSET_CFI_RESP 0x10
+#define FLASH_OFFSET_WTOUT 0x1F
+#define FLASH_OFFSET_WBTOUT 0x20
+#define FLASH_OFFSET_ETOUT 0x21
+#define FLASH_OFFSET_CETOUT 0x22
+#define FLASH_OFFSET_WMAX_TOUT 0x23
+#define FLASH_OFFSET_WBMAX_TOUT 0x24
+#define FLASH_OFFSET_EMAX_TOUT 0x25
+#define FLASH_OFFSET_CEMAX_TOUT 0x26
+#define FLASH_OFFSET_SIZE 0x27
+#define FLASH_OFFSET_INTERFACE 0x28
+#define FLASH_OFFSET_BUFFER_SIZE 0x2A
+#define FLASH_OFFSET_NUM_ERASE_REGIONS 0x2C
+#define FLASH_OFFSET_ERASE_REGIONS 0x2D
+#define FLASH_OFFSET_PROTECT 0x02
+#define FLASH_OFFSET_USER_PROTECTION 0x85
+#define FLASH_OFFSET_INTEL_PROTECTION 0x81
+
+#define FLASH_MAN_CFI 0x01000000
+
+typedef union {
+ unsigned char c;
+ unsigned short w;
+ unsigned long l;
+} cfiword_t;
+
+typedef union {
+ unsigned char *cp;
+ unsigned short *wp;
+ unsigned long *lp;
+} cfiptr_t;
+
+#define NUM_ERASE_REGIONS 4
+
+flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
+
+/*-----------------------------------------------------------------------
+ * Functions
+ */
+
+static void flash_add_byte(flash_info_t * info, cfiword_t * cword, uchar c);
+static void flash_make_cmd(flash_info_t * info, uchar cmd, void *cmdbuf);
+static void flash_write_cmd(flash_info_t * info, int sect, uchar offset,
+ uchar cmd);
+static int flash_isequal(flash_info_t * info, int sect, uchar offset,
+ uchar cmd);
+static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd);
+static int flash_detect_cfi(flash_info_t * info);
+static ulong flash_get_size(ulong base, int banknum);
+static int flash_write_cfiword(flash_info_t * info, ulong dest,
+ cfiword_t cword);
+static int flash_full_status_check(flash_info_t * info, ulong sector,
+ ulong tout, char *prompt);
+#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
+static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp,
+ int len);
+#endif
+/*-----------------------------------------------------------------------
+ * create an address based on the offset and the port width
+ */
+inline uchar *flash_make_addr(flash_info_t * info, int sect, int offset)
+{
+ return ((uchar *) (info->start[sect] + (offset * info->portwidth)));
+}
+
+/*-----------------------------------------------------------------------
+ * read a character at a port width address
+ */
+inline uchar flash_read_uchar(flash_info_t * info, uchar offset)
+{
+ uchar *cp;
+ cp = flash_make_addr(info, 0, offset);
+ return (cp[info->portwidth - 1]);
+}
+
+/*-----------------------------------------------------------------------
+ * read a short word by swapping for ppc format.
+ */
+ushort flash_read_ushort(flash_info_t * info, int sect, uchar offset)
+{
+ uchar *addr;
+
+ addr = flash_make_addr(info, sect, offset);
+ return ((addr[(2 * info->portwidth) - 1] << 8) |
+ addr[info->portwidth - 1]);
+
+}
+
+/*-----------------------------------------------------------------------
+ * read a long word by picking the least significant byte of each maiximum
+ * port size word. Swap for ppc format.
+ */
+ulong flash_read_long(flash_info_t * info, int sect, uchar offset)
+{
+ uchar *addr;
+
+ addr = flash_make_addr(info, sect, offset);
+ return ((addr[(2 * info->portwidth) - 1] << 24) |
+ (addr[(info->portwidth) - 1] << 16) |
+ (addr[(4 * info->portwidth) - 1] << 8) |
+ addr[(3 * info->portwidth) - 1]);
+
+}
+
+/*-----------------------------------------------------------------------
+ */
+unsigned long flash_init(void)
+{
+ unsigned long size;
+ int i;
+ unsigned long address;
+
+ /* The flash is positioned back to back, with the demultiplexing of the chip
+ * based on the A24 address line.
+ *
+ */
+
+ address = CONFIG_SYS_FLASH_BASE;
+ size = 0;
+
+ /* Init: no FLASHes known */
+ for (i = 0; i < CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
+ flash_info[i].flash_id = FLASH_UNKNOWN;
+ size += flash_info[i].size = flash_get_size(address, i);
+ address += CONFIG_SYS_FLASH_INCREMENT;
+ if (flash_info[i].flash_id == FLASH_UNKNOWN) {
+ printf
+ ("## Unknown FLASH on Bank %d - Size = 0x%08lx = %ld MB\n",
+ i, flash_info[0].size, flash_info[i].size << 20);
+ }
+ }
+
+#if 0 /* test-only */
+ /* Monitor protection ON by default */
+#if (CONFIG_SYS_MONITOR_BASE >= CONFIG_SYS_FLASH_BASE)
+ for (i = 0;
+ flash_info[0].start[i] < CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1;
+ i++)
+ (void)flash_real_protect(&flash_info[0], i, 1);
+#endif
+#endif
+
+ return (size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+int flash_erase(flash_info_t * info, int s_first, int s_last)
+{
+ int rcode = 0;
+ int prot;
+ int sect;
+
+ if (info->flash_id != FLASH_MAN_CFI) {
+ printf("Can't erase unknown flash type - aborted\n");
+ return 1;
+ }
+ if ((s_first < 0) || (s_first > s_last)) {
+ 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 sectors will not be erased!\n",
+ prot);
+ } else {
+ printf("\n");
+ }
+
+ for (sect = s_first; sect <= s_last; sect++) {
+ if (info->protect[sect] == 0) { /* not protected */
+ flash_write_cmd(info, sect, 0, FLASH_CMD_CLEAR_STATUS);
+ flash_write_cmd(info, sect, 0, FLASH_CMD_BLOCK_ERASE);
+ flash_write_cmd(info, sect, 0, FLASH_CMD_ERASE_CONFIRM);
+
+ if (flash_full_status_check
+ (info, sect, info->erase_blk_tout, "erase")) {
+ rcode = 1;
+ } else
+ printf(".");
+ }
+ }
+ printf(" done\n");
+ return rcode;
+}
+
+/*-----------------------------------------------------------------------
+ */
+void flash_print_info(flash_info_t * info)
+{
+ int i;
+
+ if (info->flash_id != FLASH_MAN_CFI) {
+ printf("missing or unknown FLASH type\n");
+ return;
+ }
+
+ printf("CFI conformant FLASH (%d x %d)",
+ (info->portwidth << 3), (info->chipwidth << 3));
+ printf(" Size: %ld MB in %d Sectors\n",
+ info->size >> 20, info->sector_count);
+ printf
+ (" Erase timeout %ld ms, write timeout %ld ms, buffer write timeout %ld ms, buffer size %d\n",
+ info->erase_blk_tout, info->write_tout, info->buffer_write_tout,
+ info->buffer_size);
+
+ printf(" Sector Start Addresses:");
+ for (i = 0; i < info->sector_count; ++i) {
+ if ((i % 5) == 0)
+ printf("\n");
+ printf(" %08lX%5s",
+ info->start[i], info->protect[i] ? " (RO)" : " ");
+ }
+ printf("\n");
+ return;
+}
+
+/*-----------------------------------------------------------------------
+ * 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 wp;
+ ulong cp;
+ int aln;
+ cfiword_t cword;
+ int i, rc;
+
+ /* get lower aligned address */
+ wp = (addr & ~(info->portwidth - 1));
+
+ /* handle unaligned start */
+ if ((aln = addr - wp) != 0) {
+ cword.l = 0;
+ cp = wp;
+ for (i = 0; i < aln; ++i, ++cp)
+ flash_add_byte(info, &cword, (*(uchar *) cp));
+
+ for (; (i < info->portwidth) && (cnt > 0); i++) {
+ flash_add_byte(info, &cword, *src++);
+ cnt--;
+ cp++;
+ }
+ for (; (cnt == 0) && (i < info->portwidth); ++i, ++cp)
+ flash_add_byte(info, &cword, (*(uchar *) cp));
+ if ((rc = flash_write_cfiword(info, wp, cword)) != 0)
+ return rc;
+ wp = cp;
+ }
+#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
+ while (cnt >= info->portwidth) {
+ i = info->buffer_size > cnt ? cnt : info->buffer_size;
+ if ((rc = flash_write_cfibuffer(info, wp, src, i)) != ERR_OK)
+ return rc;
+ wp += i;
+ src += i;
+ cnt -= i;
+ }
+#else
+ /* handle the aligned part */
+ while (cnt >= info->portwidth) {
+ cword.l = 0;
+ for (i = 0; i < info->portwidth; i++) {
+ flash_add_byte(info, &cword, *src++);
+ }
+ if ((rc = flash_write_cfiword(info, wp, cword)) != 0)
+ return rc;
+ wp += info->portwidth;
+ cnt -= info->portwidth;
+ }
+#endif /* CONFIG_SYS_FLASH_USE_BUFFER_WRITE */
+ if (cnt == 0) {
+ return (0);
+ }
+
+ /*
+ * handle unaligned tail bytes
+ */
+ cword.l = 0;
+ for (i = 0, cp = wp; (i < info->portwidth) && (cnt > 0); ++i, ++cp) {
+ flash_add_byte(info, &cword, *src++);
+ --cnt;
+ }
+ for (; i < info->portwidth; ++i, ++cp) {
+ flash_add_byte(info, &cword, (*(uchar *) cp));
+ }
+
+ return flash_write_cfiword(info, wp, cword);
+}
+
+/*-----------------------------------------------------------------------
+ */
+int flash_real_protect(flash_info_t * info, long sector, int prot)
+{
+ int retcode = 0;
+
+ flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
+ flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT);
+ if (prot)
+ flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_SET);
+ else
+ flash_write_cmd(info, sector, 0, FLASH_CMD_PROTECT_CLEAR);
+
+ if ((retcode =
+ flash_full_status_check(info, sector, info->erase_blk_tout,
+ prot ? "protect" : "unprotect")) == 0) {
+
+ info->protect[sector] = prot;
+ /* Intel's unprotect unprotects all locking */
+ if (prot == 0) {
+ int i;
+ for (i = 0; i < info->sector_count; i++) {
+ if (info->protect[i])
+ flash_real_protect(info, i, 1);
+ }
+ }
+ }
+
+ return retcode;
+}
+
+/*-----------------------------------------------------------------------
+ * wait for XSR.7 to be set. Time out with an error if it does not.
+ * This routine does not set the flash to read-array mode.
+ */
+static int flash_status_check(flash_info_t * info, ulong sector, ulong tout,
+ char *prompt)
+{
+ ulong start;
+
+ /* Wait for command completion */
+ start = get_timer(0);
+ while (!flash_isset(info, sector, 0, FLASH_STATUS_DONE)) {
+ if (get_timer(start) > info->erase_blk_tout) {
+ printf("Flash %s timeout at address %lx\n", prompt,
+ info->start[sector]);
+ flash_write_cmd(info, sector, 0, FLASH_CMD_RESET);
+ return ERR_TIMOUT;
+ }
+ }
+ return ERR_OK;
+}
+
+/*-----------------------------------------------------------------------
+ * Wait for XSR.7 to be set, if it times out print an error, otherwise do a full status check.
+ * This routine sets the flash to read-array mode.
+ */
+static int flash_full_status_check(flash_info_t * info, ulong sector,
+ ulong tout, char *prompt)
+{
+ int retcode;
+ retcode = flash_status_check(info, sector, tout, prompt);
+ if ((retcode == ERR_OK)
+ && !flash_isequal(info, sector, 0, FLASH_STATUS_DONE)) {
+ retcode = ERR_INVAL;
+ printf("Flash %s error at address %lx\n", prompt,
+ info->start[sector]);
+ if (flash_isset
+ (info, sector, 0,
+ FLASH_STATUS_ECLBS | FLASH_STATUS_PSLBS)) {
+ printf("Command Sequence Error.\n");
+ } else if (flash_isset(info, sector, 0, FLASH_STATUS_ECLBS)) {
+ printf("Block Erase Error.\n");
+ retcode = ERR_NOT_ERASED;
+ } else if (flash_isset(info, sector, 0, FLASH_STATUS_PSLBS)) {
+ printf("Locking Error\n");
+ }
+ if (flash_isset(info, sector, 0, FLASH_STATUS_DPS)) {
+ printf("Block locked.\n");
+ retcode = ERR_PROTECTED;
+ }
+ if (flash_isset(info, sector, 0, FLASH_STATUS_VPENS))
+ printf("Vpp Low Error.\n");
+ }
+ flash_write_cmd(info, sector, 0, FLASH_CMD_RESET);
+ return retcode;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static void flash_add_byte(flash_info_t * info, cfiword_t * cword, uchar c)
+{
+ switch (info->portwidth) {
+ case FLASH_CFI_8BIT:
+ cword->c = c;
+ break;
+ case FLASH_CFI_16BIT:
+ cword->w = (cword->w << 8) | c;
+ break;
+ case FLASH_CFI_32BIT:
+ cword->l = (cword->l << 8) | c;
+ }
+}
+
+/*-----------------------------------------------------------------------
+ * make a proper sized command based on the port and chip widths
+ */
+static void flash_make_cmd(flash_info_t * info, uchar cmd, void *cmdbuf)
+{
+ int i;
+ uchar *cp = (uchar *) cmdbuf;
+ for (i = 0; i < info->portwidth; i++)
+ *cp++ = ((i + 1) % info->chipwidth) ? '\0' : cmd;
+}
+
+/*
+ * Write a proper sized command to the correct address
+ */
+static void flash_write_cmd(flash_info_t * info, int sect, uchar offset,
+ uchar cmd)
+{
+
+ volatile cfiptr_t addr;
+ cfiword_t cword;
+ addr.cp = flash_make_addr(info, sect, offset);
+ flash_make_cmd(info, cmd, &cword);
+ switch (info->portwidth) {
+ case FLASH_CFI_8BIT:
+ *addr.cp = cword.c;
+ break;
+ case FLASH_CFI_16BIT:
+ *addr.wp = cword.w;
+ break;
+ case FLASH_CFI_32BIT:
+ *addr.lp = cword.l;
+ break;
+ }
+}
+
+/*-----------------------------------------------------------------------
+ */
+static int flash_isequal(flash_info_t * info, int sect, uchar offset, uchar cmd)
+{
+ cfiptr_t cptr;
+ cfiword_t cword;
+ int retval;
+ cptr.cp = flash_make_addr(info, sect, offset);
+ flash_make_cmd(info, cmd, &cword);
+ switch (info->portwidth) {
+ case FLASH_CFI_8BIT:
+ retval = (cptr.cp[0] == cword.c);
+ break;
+ case FLASH_CFI_16BIT:
+ retval = (cptr.wp[0] == cword.w);
+ break;
+ case FLASH_CFI_32BIT:
+ retval = (cptr.lp[0] == cword.l);
+ break;
+ default:
+ retval = 0;
+ break;
+ }
+ return retval;
+}
+
+/*-----------------------------------------------------------------------
+ */
+static int flash_isset(flash_info_t * info, int sect, uchar offset, uchar cmd)
+{
+ cfiptr_t cptr;
+ cfiword_t cword;
+ int retval;
+ cptr.cp = flash_make_addr(info, sect, offset);
+ flash_make_cmd(info, cmd, &cword);
+ switch (info->portwidth) {
+ case FLASH_CFI_8BIT:
+ retval = ((cptr.cp[0] & cword.c) == cword.c);
+ break;
+ case FLASH_CFI_16BIT:
+ retval = ((cptr.wp[0] & cword.w) == cword.w);
+ break;
+ case FLASH_CFI_32BIT:
+ retval = ((cptr.lp[0] & cword.l) == cword.l);
+ break;
+ default:
+ retval = 0;
+ break;
+ }
+ return retval;
+}
+
+/*-----------------------------------------------------------------------
+ * detect if flash is compatible with the Common Flash Interface (CFI)
+ * http://www.jedec.org/download/search/jesd68.pdf
+ *
+ */
+static int flash_detect_cfi(flash_info_t * info)
+{
+
+ for (info->portwidth = FLASH_CFI_8BIT;
+ info->portwidth <= FLASH_CFI_32BIT; info->portwidth <<= 1) {
+ for (info->chipwidth = FLASH_CFI_BY8;
+ info->chipwidth <= info->portwidth;
+ info->chipwidth <<= 1) {
+ flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
+ flash_write_cmd(info, 0, FLASH_OFFSET_CFI,
+ FLASH_CMD_CFI);
+ if (flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP, 'Q')
+ && flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 1,
+ 'R')
+ && flash_isequal(info, 0, FLASH_OFFSET_CFI_RESP + 2,
+ 'Y'))
+ return 1;
+ }
+ }
+ return 0;
+}
+
+/*
+ * The following code cannot be run from FLASH!
+ *
+ */
+static ulong flash_get_size(ulong base, int banknum)
+{
+ flash_info_t *info = &flash_info[banknum];
+ int i, j;
+ int sect_cnt;
+ unsigned long sector;
+ unsigned long tmp;
+ int size_ratio = 0;
+ uchar num_erase_regions;
+ int erase_region_size;
+ int erase_region_count;
+
+ info->start[0] = base;
+#if 0
+ invalidate_dcache_range(base, base + 0x400);
+#endif
+ if (flash_detect_cfi(info)) {
+
+ size_ratio = info->portwidth / info->chipwidth;
+ num_erase_regions =
+ flash_read_uchar(info, FLASH_OFFSET_NUM_ERASE_REGIONS);
+
+ sect_cnt = 0;
+ sector = base;
+ for (i = 0; i < num_erase_regions; i++) {
+ if (i > NUM_ERASE_REGIONS) {
+ printf("%d erase regions found, only %d used\n",
+ num_erase_regions, NUM_ERASE_REGIONS);
+ break;
+ }
+ tmp =
+ flash_read_long(info, 0,
+ FLASH_OFFSET_ERASE_REGIONS);
+ erase_region_size =
+ (tmp & 0xffff) ? ((tmp & 0xffff) * 256) : 128;
+ tmp >>= 16;
+ erase_region_count = (tmp & 0xffff) + 1;
+ for (j = 0; j < erase_region_count; j++) {
+ info->start[sect_cnt] = sector;
+ sector += (erase_region_size * size_ratio);
+ info->protect[sect_cnt] =
+ flash_isset(info, sect_cnt,
+ FLASH_OFFSET_PROTECT,
+ FLASH_STATUS_PROTECT);
+ sect_cnt++;
+ }
+ }
+
+ info->sector_count = sect_cnt;
+ /* multiply the size by the number of chips */
+ info->size =
+ (1 << flash_read_uchar(info, FLASH_OFFSET_SIZE)) *
+ size_ratio;
+ info->buffer_size =
+ (1 << flash_read_ushort(info, 0, FLASH_OFFSET_BUFFER_SIZE));
+ tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_ETOUT);
+ info->erase_blk_tout =
+ (tmp *
+ (1 << flash_read_uchar(info, FLASH_OFFSET_EMAX_TOUT)));
+ tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WBTOUT);
+ info->buffer_write_tout =
+ (tmp *
+ (1 << flash_read_uchar(info, FLASH_OFFSET_WBMAX_TOUT)));
+ tmp = 1 << flash_read_uchar(info, FLASH_OFFSET_WTOUT);
+ info->write_tout =
+ (tmp *
+ (1 << flash_read_uchar(info, FLASH_OFFSET_WMAX_TOUT))) /
+ 1000;
+ info->flash_id = FLASH_MAN_CFI;
+ }
+
+ flash_write_cmd(info, 0, 0, FLASH_CMD_RESET);
+#ifdef DEBUG_FLASH
+ printf("portwidth=%d chipwidth=%d\n", info->portwidth, info->chipwidth); /* test-only */
+#endif
+#ifdef DEBUG_FLASH
+ printf("found %d erase regions\n", num_erase_regions);
+#endif
+#ifdef DEBUG_FLASH
+ printf("size=%08x sectors=%08x \n", info->size, info->sector_count);
+#endif
+ return (info->size);
+}
+
+/*-----------------------------------------------------------------------
+ */
+static int flash_write_cfiword(flash_info_t * info, ulong dest, cfiword_t cword)
+{
+
+ cfiptr_t cptr;
+ int flag;
+
+ cptr.cp = (uchar *)dest;
+
+ /* Check if Flash is (sufficiently) erased */
+ switch (info->portwidth) {
+ case FLASH_CFI_8BIT:
+ flag = ((cptr.cp[0] & cword.c) == cword.c);
+ break;
+ case FLASH_CFI_16BIT:
+ flag = ((cptr.wp[0] & cword.w) == cword.w);
+ break;
+ case FLASH_CFI_32BIT:
+ flag = ((cptr.lp[0] & cword.l) == cword.l);
+ break;
+ default:
+ return 2;
+ }
+ if (!flag)
+ return 2;
+
+ /* Disable interrupts which might cause a timeout here */
+ flag = disable_interrupts();
+
+ flash_write_cmd(info, 0, 0, FLASH_CMD_CLEAR_STATUS);
+ flash_write_cmd(info, 0, 0, FLASH_CMD_WRITE);
+
+ switch (info->portwidth) {
+ case FLASH_CFI_8BIT:
+ cptr.cp[0] = cword.c;
+ break;
+ case FLASH_CFI_16BIT:
+ cptr.wp[0] = cword.w;
+ break;
+ case FLASH_CFI_32BIT:
+ cptr.lp[0] = cword.l;
+ break;
+ }
+
+ /* re-enable interrupts if necessary */
+ if (flag)
+ enable_interrupts();
+
+ return flash_full_status_check(info, 0, info->write_tout, "write");
+}
+
+#ifdef CONFIG_SYS_FLASH_USE_BUFFER_WRITE
+
+/* loop through the sectors from the highest address
+ * when the passed address is greater or equal to the sector address
+ * we have a match
+ */
+static int find_sector(flash_info_t * info, ulong addr)
+{
+ int sector;
+ for (sector = info->sector_count - 1; sector >= 0; sector--) {
+ if (addr >= info->start[sector])
+ break;
+ }
+ return sector;
+}
+
+static int flash_write_cfibuffer(flash_info_t * info, ulong dest, uchar * cp,
+ int len)
+{
+
+ int sector;
+ int cnt;
+ int retcode;
+ volatile cfiptr_t src;
+ volatile cfiptr_t dst;
+
+ src.cp = cp;
+ dst.cp = (uchar *) dest;
+ sector = find_sector(info, dest);
+ flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
+ flash_write_cmd(info, sector, 0, FLASH_CMD_WRITE_TO_BUFFER);
+ if ((retcode = flash_status_check(info, sector, info->buffer_write_tout,
+ "write to buffer")) == ERR_OK) {
+ switch (info->portwidth) {
+ case FLASH_CFI_8BIT:
+ cnt = len;
+ break;
+ case FLASH_CFI_16BIT:
+ cnt = len >> 1;
+ break;
+ case FLASH_CFI_32BIT:
+ cnt = len >> 2;
+ break;
+ default:
+ return ERR_INVAL;
+ break;
+ }
+ flash_write_cmd(info, sector, 0, (uchar) cnt - 1);
+ while (cnt-- > 0) {
+ switch (info->portwidth) {
+ case FLASH_CFI_8BIT:
+ *dst.cp++ = *src.cp++;
+ break;
+ case FLASH_CFI_16BIT:
+ *dst.wp++ = *src.wp++;
+ break;
+ case FLASH_CFI_32BIT:
+ *dst.lp++ = *src.lp++;
+ break;
+ default:
+ return ERR_INVAL;
+ break;
+ }
+ }
+ flash_write_cmd(info, sector, 0,
+ FLASH_CMD_WRITE_BUFFER_CONFIRM);
+ retcode =
+ flash_full_status_check(info, sector,
+ info->buffer_write_tout,
+ "buffer write");
+ }
+ flash_write_cmd(info, sector, 0, FLASH_CMD_CLEAR_STATUS);
+ return retcode;
+}
+#endif /* CONFIG_SYS_USE_FLASH_BUFFER_WRITE */
Code Review / kvmfornfv.git / blobdiff