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u-boot/drivers/mtd/st_smi.c
Masahiro Yamada e856bdcfb4 flash: complete CONFIG_SYS_NO_FLASH move with renaming 
We repeated partial moves for CONFIG_SYS_NO_FLASH, but this is
not completed. Finish this work by the tool.

During this move, let's rename it to CONFIG_MTD_NOR_FLASH.
Actually, we have more instances of "#ifndef CONFIG_SYS_NO_FLASH"
than those of "#ifdef CONFIG_SYS_NO_FLASH".  Flipping the logic will
make the code more readable.  Besides, negative meaning symbols do
not fit in obj-$(CONFIG_...) style Makefiles.

This commit was created as follows:

[1] Edit "default n" to "default y" in the config entry in
    common/Kconfig.

[2] Run "tools/moveconfig.py -y -r HEAD SYS_NO_FLASH"

[3] Rename the instances in defconfigs by the following:
  find . -path './configs/*_defconfig' | xargs sed -i \
  -e '/CONFIG_SYS_NO_FLASH=y/d' \
  -e 's/# CONFIG_SYS_NO_FLASH is not set/CONFIG_MTD_NOR_FLASH=y/'

[4] Change the conditionals by the following:
  find . -name '*.[ch]' | xargs sed -i \
  -e 's/ifndef CONFIG_SYS_NO_FLASH/ifdef CONFIG_MTD_NOR_FLASH/' \
  -e 's/ifdef CONFIG_SYS_NO_FLASH/ifndef CONFIG_MTD_NOR_FLASH/' \
  -e 's/!defined(CONFIG_SYS_NO_FLASH)/defined(CONFIG_MTD_NOR_FLASH)/' \
  -e 's/defined(CONFIG_SYS_NO_FLASH)/!defined(CONFIG_MTD_NOR_FLASH)/'

[5] Modify the following manually
  - Rename the rest of instances
  - Remove the description from README
  - Create the new Kconfig entry in drivers/mtd/Kconfig
  - Remove the old Kconfig entry from common/Kconfig
  - Remove the garbage comments from include/configs/*.h

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-02-12 14:30:25 -05:00

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/*
* (C) Copyright 2009
* Vipin Kumar, ST Microelectronics, vipin.kumar@st.com.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <flash.h>
#include <linux/err.h>
#include <linux/mtd/st_smi.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
#if defined(CONFIG_MTD_NOR_FLASH)
static struct smi_regs *const smicntl =
(struct smi_regs * const)CONFIG_SYS_SMI_BASE;
static ulong bank_base[CONFIG_SYS_MAX_FLASH_BANKS] =
CONFIG_SYS_FLASH_ADDR_BASE;
flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS];
/* data structure to maintain flash ids from different vendors */
struct flash_device {
char *name;
u8 erase_cmd;
u32 device_id;
u32 pagesize;
unsigned long sectorsize;
unsigned long size_in_bytes;
};
#define FLASH_ID(n, es, id, psize, ssize, size) \
{ \
.name = n, \
.erase_cmd = es, \
.device_id = id, \
.pagesize = psize, \
.sectorsize = ssize, \
.size_in_bytes = size \
}
/*
* List of supported flash devices.
* Currently the erase_cmd field is not used in this driver.
*/
static struct flash_device flash_devices[] = {
FLASH_ID("st m25p16" , 0xd8, 0x00152020, 0x100, 0x10000, 0x200000),
FLASH_ID("st m25p32" , 0xd8, 0x00162020, 0x100, 0x10000, 0x400000),
FLASH_ID("st m25p64" , 0xd8, 0x00172020, 0x100, 0x10000, 0x800000),
FLASH_ID("st m25p128" , 0xd8, 0x00182020, 0x100, 0x40000, 0x1000000),
FLASH_ID("st m25p05" , 0xd8, 0x00102020, 0x80 , 0x8000 , 0x10000),
FLASH_ID("st m25p10" , 0xd8, 0x00112020, 0x80 , 0x8000 , 0x20000),
FLASH_ID("st m25p20" , 0xd8, 0x00122020, 0x100, 0x10000, 0x40000),
FLASH_ID("st m25p40" , 0xd8, 0x00132020, 0x100, 0x10000, 0x80000),
FLASH_ID("st m25p80" , 0xd8, 0x00142020, 0x100, 0x10000, 0x100000),
FLASH_ID("st m45pe10" , 0xd8, 0x00114020, 0x100, 0x10000, 0x20000),
FLASH_ID("st m45pe20" , 0xd8, 0x00124020, 0x100, 0x10000, 0x40000),
FLASH_ID("st m45pe40" , 0xd8, 0x00134020, 0x100, 0x10000, 0x80000),
FLASH_ID("st m45pe80" , 0xd8, 0x00144020, 0x100, 0x10000, 0x100000),
FLASH_ID("sp s25fl004" , 0xd8, 0x00120201, 0x100, 0x10000, 0x80000),
FLASH_ID("sp s25fl008" , 0xd8, 0x00130201, 0x100, 0x10000, 0x100000),
FLASH_ID("sp s25fl016" , 0xd8, 0x00140201, 0x100, 0x10000, 0x200000),
FLASH_ID("sp s25fl032" , 0xd8, 0x00150201, 0x100, 0x10000, 0x400000),
FLASH_ID("sp s25fl064" , 0xd8, 0x00160201, 0x100, 0x10000, 0x800000),
FLASH_ID("mac 25l512" , 0xd8, 0x001020C2, 0x010, 0x10000, 0x10000),
FLASH_ID("mac 25l1005" , 0xd8, 0x001120C2, 0x010, 0x10000, 0x20000),
FLASH_ID("mac 25l2005" , 0xd8, 0x001220C2, 0x010, 0x10000, 0x40000),
FLASH_ID("mac 25l4005" , 0xd8, 0x001320C2, 0x010, 0x10000, 0x80000),
FLASH_ID("mac 25l4005a" , 0xd8, 0x001320C2, 0x010, 0x10000, 0x80000),
FLASH_ID("mac 25l8005" , 0xd8, 0x001420C2, 0x010, 0x10000, 0x100000),
FLASH_ID("mac 25l1605" , 0xd8, 0x001520C2, 0x100, 0x10000, 0x200000),
FLASH_ID("mac 25l1605a" , 0xd8, 0x001520C2, 0x010, 0x10000, 0x200000),
FLASH_ID("mac 25l3205" , 0xd8, 0x001620C2, 0x100, 0x10000, 0x400000),
FLASH_ID("mac 25l3205a" , 0xd8, 0x001620C2, 0x100, 0x10000, 0x400000),
FLASH_ID("mac 25l6405" , 0xd8, 0x001720C2, 0x100, 0x10000, 0x800000),
FLASH_ID("wbd w25q128" , 0xd8, 0x001840EF, 0x100, 0x10000, 0x1000000),
};
/*
* smi_wait_xfer_finish - Wait until TFF is set in status register
* @timeout: timeout in milliseconds
*
* Wait until TFF is set in status register
*/
static int smi_wait_xfer_finish(int timeout)
{
ulong start = get_timer(0);
while (get_timer(start) < timeout) {
if (readl(&smicntl->smi_sr) & TFF)
return 0;
/* Try after 10 ms */
udelay(10);
};
return -1;
}
/*
* smi_read_id - Read flash id
* @info: flash_info structure pointer
* @banknum: bank number
*
* Read the flash id present at bank #banknum
*/
static unsigned int smi_read_id(flash_info_t *info, int banknum)
{
unsigned int value;
writel(readl(&smicntl->smi_cr1) | SW_MODE, &smicntl->smi_cr1);
writel(READ_ID, &smicntl->smi_tr);
writel((banknum << BANKSEL_SHIFT) | SEND | TX_LEN_1 | RX_LEN_3,
&smicntl->smi_cr2);
if (smi_wait_xfer_finish(XFER_FINISH_TOUT))
return -EIO;
value = (readl(&smicntl->smi_rr) & 0x00FFFFFF);
writel(readl(&smicntl->smi_sr) & ~TFF, &smicntl->smi_sr);
writel(readl(&smicntl->smi_cr1) & ~SW_MODE, &smicntl->smi_cr1);
return value;
}
/*
* flash_get_size - Detect the SMI flash by reading the ID.
* @base: Base address of the flash area bank #banknum
* @banknum: Bank number
*
* Detect the SMI flash by reading the ID. Initializes the flash_info structure
* with size, sector count etc.
*/
static ulong flash_get_size(ulong base, int banknum)
{
flash_info_t *info = &flash_info[banknum];
int value;
int i;
value = smi_read_id(info, banknum);
if (value < 0) {
printf("Flash id could not be read\n");
return 0;
}
/* Matches chip-id to entire list of 'serial-nor flash' ids */
for (i = 0; i < ARRAY_SIZE(flash_devices); i++) {
if (flash_devices[i].device_id == value) {
info->size = flash_devices[i].size_in_bytes;
info->flash_id = value;
info->start[0] = base;
info->sector_count =
info->size/flash_devices[i].sectorsize;
return info->size;
}
}
return 0;
}
/*
* smi_read_sr - Read status register of SMI
* @bank: bank number
*
* This routine will get the status register of the flash chip present at the
* given bank
*/
static int smi_read_sr(int bank)
{
u32 ctrlreg1, val;
/* store the CTRL REG1 state */
ctrlreg1 = readl(&smicntl->smi_cr1);
/* Program SMI in HW Mode */
writel(readl(&smicntl->smi_cr1) & ~(SW_MODE | WB_MODE),
&smicntl->smi_cr1);
/* Performing a RSR instruction in HW mode */
writel((bank << BANKSEL_SHIFT) | RD_STATUS_REG, &smicntl->smi_cr2);
if (smi_wait_xfer_finish(XFER_FINISH_TOUT))
return -1;
val = readl(&smicntl->smi_sr);
/* Restore the CTRL REG1 state */
writel(ctrlreg1, &smicntl->smi_cr1);
return val;
}
/*
* smi_wait_till_ready - Wait till last operation is over.
* @bank: bank number shifted.
* @timeout: timeout in milliseconds.
*
* This routine checks for WIP(write in progress)bit in Status register(SMSR-b0)
* The routine checks for #timeout loops, each at interval of 1 milli-second.
* If successful the routine returns 0.
*/
static int smi_wait_till_ready(int bank, int timeout)
{
int sr;
ulong start = get_timer(0);
/* One chip guarantees max 5 msec wait here after page writes,
but potentially three seconds (!) after page erase. */
while (get_timer(start) < timeout) {
sr = smi_read_sr(bank);
if ((sr >= 0) && (!(sr & WIP_BIT)))
return 0;
/* Try again after 10 usec */
udelay(10);
} while (timeout--);
printf("SMI controller is still in wait, timeout=%d\n", timeout);
return -EIO;
}
/*
* smi_write_enable - Enable the flash to do write operation
* @bank: bank number
*
* Set write enable latch with Write Enable command.
* Returns negative if error occurred.
*/
static int smi_write_enable(int bank)
{
u32 ctrlreg1;
u32 start;
int timeout = WMODE_TOUT;
int sr;
/* Store the CTRL REG1 state */
ctrlreg1 = readl(&smicntl->smi_cr1);
/* Program SMI in H/W Mode */
writel(readl(&smicntl->smi_cr1) & ~SW_MODE, &smicntl->smi_cr1);
/* Give the Flash, Write Enable command */
writel((bank << BANKSEL_SHIFT) | WE, &smicntl->smi_cr2);
if (smi_wait_xfer_finish(XFER_FINISH_TOUT))
return -1;
/* Restore the CTRL REG1 state */
writel(ctrlreg1, &smicntl->smi_cr1);
start = get_timer(0);
while (get_timer(start) < timeout) {
sr = smi_read_sr(bank);
if ((sr >= 0) && (sr & (1 << (bank + WM_SHIFT))))
return 0;
/* Try again after 10 usec */
udelay(10);
};
return -1;
}
/*
* smi_init - SMI initialization routine
*
* SMI initialization routine. Sets SMI control register1.
*/
void smi_init(void)
{
/* Setting the fast mode values. SMI working at 166/4 = 41.5 MHz */
writel(HOLD1 | FAST_MODE | BANK_EN | DSEL_TIME | PRESCAL4,
&smicntl->smi_cr1);
}
/*
* smi_sector_erase - Erase flash sector
* @info: flash_info structure pointer
* @sector: sector number
*
* Set write enable latch with Write Enable command.
* Returns negative if error occurred.
*/
static int smi_sector_erase(flash_info_t *info, unsigned int sector)
{
int bank;
unsigned int sect_add;
unsigned int instruction;
switch (info->start[0]) {
case SMIBANK0_BASE:
bank = BANK0;
break;
case SMIBANK1_BASE:
bank = BANK1;
break;
case SMIBANK2_BASE:
bank = BANK2;
break;
case SMIBANK3_BASE:
bank = BANK3;
break;
default:
return -1;
}
sect_add = sector * (info->size / info->sector_count);
instruction = ((sect_add >> 8) & 0x0000FF00) | SECTOR_ERASE;
writel(readl(&smicntl->smi_sr) & ~(ERF1 | ERF2), &smicntl->smi_sr);
/* Wait until finished previous write command. */
if (smi_wait_till_ready(bank, CONFIG_SYS_FLASH_ERASE_TOUT))
return -EBUSY;
/* Send write enable, before erase commands. */
if (smi_write_enable(bank))
return -EIO;
/* Put SMI in SW mode */
writel(readl(&smicntl->smi_cr1) | SW_MODE, &smicntl->smi_cr1);
/* Send Sector Erase command in SW Mode */
writel(instruction, &smicntl->smi_tr);
writel((bank << BANKSEL_SHIFT) | SEND | TX_LEN_4,
&smicntl->smi_cr2);
if (smi_wait_xfer_finish(XFER_FINISH_TOUT))
return -EIO;
if (smi_wait_till_ready(bank, CONFIG_SYS_FLASH_ERASE_TOUT))
return -EBUSY;
/* Put SMI in HW mode */
writel(readl(&smicntl->smi_cr1) & ~SW_MODE,
&smicntl->smi_cr1);
return 0;
}
/*
* smi_write - Write to SMI flash
* @src_addr: source buffer
* @dst_addr: destination buffer
* @length: length to write in bytes
* @bank: bank base address
*
* Write to SMI flash
*/
static int smi_write(unsigned int *src_addr, unsigned int *dst_addr,
unsigned int length, ulong bank_addr)
{
u8 *src_addr8 = (u8 *)src_addr;
u8 *dst_addr8 = (u8 *)dst_addr;
int banknum;
int i;
switch (bank_addr) {
case SMIBANK0_BASE:
banknum = BANK0;
break;
case SMIBANK1_BASE:
banknum = BANK1;
break;
case SMIBANK2_BASE:
banknum = BANK2;
break;
case SMIBANK3_BASE:
banknum = BANK3;
break;
default:
return -1;
}
if (smi_wait_till_ready(banknum, CONFIG_SYS_FLASH_WRITE_TOUT))
return -EBUSY;
/* Set SMI in Hardware Mode */
writel(readl(&smicntl->smi_cr1) & ~SW_MODE, &smicntl->smi_cr1);
if (smi_write_enable(banknum))
return -EIO;
/* Perform the write command */
for (i = 0; i < length; i += 4) {
if (((ulong) (dst_addr) % SFLASH_PAGE_SIZE) == 0) {
if (smi_wait_till_ready(banknum,
CONFIG_SYS_FLASH_WRITE_TOUT))
return -EBUSY;
if (smi_write_enable(banknum))
return -EIO;
}
if (length < 4) {
int k;
/*
* Handle special case, where length < 4 (redundant env)
*/
for (k = 0; k < length; k++)
*dst_addr8++ = *src_addr8++;
} else {
/* Normal 32bit write */
*dst_addr++ = *src_addr++;
}
if ((readl(&smicntl->smi_sr) & (ERF1 | ERF2)))
return -EIO;
}
if (smi_wait_till_ready(banknum, CONFIG_SYS_FLASH_WRITE_TOUT))
return -EBUSY;
writel(readl(&smicntl->smi_sr) & ~(WCF), &smicntl->smi_sr);
return 0;
}
/*
* write_buff - Write to SMI flash
* @info: flash info structure
* @src: source buffer
* @dest_addr: destination buffer
* @length: length to write in words
*
* Write to SMI flash
*/
int write_buff(flash_info_t *info, uchar *src, ulong dest_addr, ulong length)
{
return smi_write((unsigned int *)src, (unsigned int *)dest_addr,
length, info->start[0]);
}
/*
* flash_init - SMI flash initialization
*
* SMI flash initialization
*/
unsigned long flash_init(void)
{
unsigned long size = 0;
int i, j;
smi_init();
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(bank_base[i], i);
}
for (j = 0; j < CONFIG_SYS_MAX_FLASH_BANKS; j++) {
for (i = 1; i < flash_info[j].sector_count; i++)
flash_info[j].start[i] =
flash_info[j].start[i - 1] +
flash_info->size / flash_info->sector_count;
}
return size;
}
/*
* flash_print_info - Print SMI flash information
*
* Print SMI flash information
*/
void flash_print_info(flash_info_t *info)
{
int i;
if (info->flash_id == FLASH_UNKNOWN) {
puts("missing or unknown FLASH type\n");
return;
}
if (info->size >= 0x100000)
printf(" Size: %ld MB in %d Sectors\n",
info->size >> 20, info->sector_count);
else
printf(" Size: %ld KB in %d Sectors\n",
info->size >> 10, info->sector_count);
puts(" Sector Start Addresses:");
for (i = 0; i < info->sector_count; ++i) {
#ifdef CONFIG_SYS_FLASH_EMPTY_INFO
int size;
int erased;
u32 *flash;
/*
* Check if whole sector is erased
*/
size = (info->size) / (info->sector_count);
flash = (u32 *) info->start[i];
size = size / sizeof(int);
while ((size--) && (*flash++ == ~0))
;
size++;
if (size)
erased = 0;
else
erased = 1;
if ((i % 5) == 0)
printf("\n");
printf(" %08lX%s%s",
info->start[i],
erased ? " E" : " ", info->protect[i] ? "RO " : " ");
#else
if ((i % 5) == 0)
printf("\n ");
printf(" %08lX%s",
info->start[i], info->protect[i] ? " (RO) " : " ");
#endif
}
putc('\n');
return;
}
/*
* flash_erase - Erase SMI flash
*
* Erase SMI flash
*/
int flash_erase(flash_info_t *info, int s_first, int s_last)
{
int rcode = 0;
int prot = 0;
flash_sect_t sect;
if ((s_first < 0) || (s_first > s_last)) {
puts("- no sectors to erase\n");
return 1;
}
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 {
putc('\n');
}
for (sect = s_first; sect <= s_last; sect++) {
if (info->protect[sect] == 0) {
if (smi_sector_erase(info, sect))
rcode = 1;
else
putc('.');
}
}
puts(" done\n");
return rcode;
}
#endif
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