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openocd/src/flash/nor/at91sam7.c

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/***************************************************************************
* Copyright (C) 2006 by Magnus Lundin *
* lundin@mlu.mine.nu *
* *
* Copyright (C) 2008 by Gheorghe Guran (atlas) *
* *
* 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
****************************************************************************/
/***************************************************************************
*
* New flash setup command:
*
* flash bank <driver> <base_addr> <size> <chip_width> <bus_width> <target_id>
* [<chip_type> <banks>
* <sectors_per_bank> <pages_per_sector>
* <page_size> <num_nvmbits>
* <ext_freq_khz>]
*
* <ext_freq_khz> - MUST be used if clock is from external source,
* CAN be used if main oscillator frequency is known (recommended)
* Examples:
* ==== RECOMMENDED (covers clock speed) ============
* flash bank at91sam7 0x00100000 0 0 4 $_TARGETNAME AT91SAM7XC256 1 16 64 256 3 25000
* (if auto-detect fails; provides clock spec)
* flash bank at91sam7 0 0 0 0 $_TARGETNAME 0 0 0 0 0 0 25000
* (auto-detect everything except the clock)
* ==== NOT RECOMMENDED !!! (clock speed is not configured) ====
* flash bank at91sam7 0x00100000 0 0 4 $_TARGETNAME AT91SAM7XC256 1 16 64 256 3 0
* (if auto-detect fails)
* flash bank at91sam7 0 0 0 0 $_TARGETNAME
* (old style, auto-detect everything)
****************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "imp.h"
#include <helper/binarybuffer.h>
/* AT91SAM7 control registers */
#define DBGU_CIDR 0xFFFFF240
#define CKGR_MCFR 0xFFFFFC24
#define CKGR_MOR 0xFFFFFC20
#define CKGR_MCFR_MAINRDY 0x10000
#define CKGR_PLLR 0xFFFFFC2c
#define CKGR_PLLR_DIV 0xff
#define CKGR_PLLR_MUL 0x07ff0000
#define PMC_MCKR 0xFFFFFC30
#define PMC_MCKR_CSS 0x03
#define PMC_MCKR_PRES 0x1c
/* Flash Controller Commands */
#define WP 0x01
#define SLB 0x02
#define WPL 0x03
#define CLB 0x04
#define EA 0x08
#define SGPB 0x0B
#define CGPB 0x0D
#define SSB 0x0F
/* MC_FSR bit definitions */
#define MC_FSR_FRDY 1
#define MC_FSR_EOL 2
/* AT91SAM7 constants */
#define RC_FREQ 32000
/* Flash timing modes */
#define FMR_TIMING_NONE 0
#define FMR_TIMING_NVBITS 1
#define FMR_TIMING_FLASH 2
/* Flash size constants */
#define FLASH_SIZE_8KB 1
#define FLASH_SIZE_16KB 2
#define FLASH_SIZE_32KB 3
#define FLASH_SIZE_64KB 5
#define FLASH_SIZE_128KB 7
#define FLASH_SIZE_256KB 9
#define FLASH_SIZE_512KB 10
#define FLASH_SIZE_1024KB 12
#define FLASH_SIZE_2048KB 14
static int at91sam7_protect_check(struct flash_bank *bank);
static int at91sam7_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset,
uint32_t count);
static uint32_t at91sam7_get_flash_status(struct target *target, int bank_number);
static void at91sam7_set_flash_mode(struct flash_bank *bank, int mode);
static uint32_t at91sam7_wait_status_busy(struct flash_bank *bank, uint32_t waitbits, int timeout);
static int at91sam7_flash_command(struct flash_bank *bank, uint8_t cmd, uint16_t pagen);
static uint32_t MC_FMR[4] = { 0xFFFFFF60, 0xFFFFFF70, 0xFFFFFF80, 0xFFFFFF90 };
static uint32_t MC_FCR[4] = { 0xFFFFFF64, 0xFFFFFF74, 0xFFFFFF84, 0xFFFFFF94 };
static uint32_t MC_FSR[4] = { 0xFFFFFF68, 0xFFFFFF78, 0xFFFFFF88, 0xFFFFFF98 };
static char *EPROC[8] = {
"Unknown", "ARM946-E", "ARM7TDMI", "Unknown", "ARM920T", "ARM926EJ-S", "Unknown", "Unknown"
};
struct at91sam7_flash_bank {
/* chip id register */
uint32_t cidr;
uint16_t cidr_ext;
uint16_t cidr_nvptyp;
uint16_t cidr_arch;
uint16_t cidr_sramsiz;
uint16_t cidr_nvpsiz;
uint16_t cidr_nvpsiz2;
uint16_t cidr_eproc;
uint16_t cidr_version;
const char *target_name;
/* flash auto-detection */
uint8_t flash_autodetection;
/* flash geometry */
uint16_t pages_per_sector;
uint16_t pagesize;
uint16_t pages_in_lockregion;
/* nv memory bits */
uint16_t num_lockbits_on;
uint16_t lockbits;
uint16_t num_nvmbits;
uint16_t num_nvmbits_on;
uint16_t nvmbits;
uint8_t securitybit;
/* 0: not init
* 1: fmcn for nvbits (1uS)
* 2: fmcn for flash (1.5uS) */
uint8_t flashmode;
/* main clock status */
uint8_t mck_valid;
uint32_t mck_freq;
/* external clock frequency */
uint32_t ext_freq;
};
#if 0
static long SRAMSIZ[16] = {
-1,
0x0400, /* 1K */
0x0800, /* 2K */
-1,
0x1c000, /* 112K */
0x1000, /* 4K */
0x14000, /* 80K */
0x28000, /* 160K */
0x2000, /* 8K */
0x4000, /* 16K */
0x8000, /* 32K */
0x10000, /* 64K */
0x20000, /* 128K */
0x40000, /* 256K */
0x18000, /* 96K */
0x80000, /* 512K */
};
#endif
static uint32_t at91sam7_get_flash_status(struct target *target, int bank_number)
{
uint32_t fsr;
target_read_u32(target, MC_FSR[bank_number], &fsr);
return fsr;
}
/* Read clock configuration and set at91sam7_info->mck_freq */
static void at91sam7_read_clock_info(struct flash_bank *bank)
{
struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
struct target *target = bank->target;
uint32_t mckr, mcfr, pllr, mor;
unsigned long tmp = 0, mainfreq;
/* Read Clock Generator Main Oscillator Register */
target_read_u32(target, CKGR_MOR, &mor);
/* Read Clock Generator Main Clock Frequency Register */
target_read_u32(target, CKGR_MCFR, &mcfr);
/* Read Master Clock Register*/
target_read_u32(target, PMC_MCKR, &mckr);
/* Read Clock Generator PLL Register */
target_read_u32(target, CKGR_PLLR, &pllr);
at91sam7_info->mck_valid = 0;
at91sam7_info->mck_freq = 0;
switch (mckr & PMC_MCKR_CSS) {
case 0: /* Slow Clock */
at91sam7_info->mck_valid = 1;
tmp = RC_FREQ;
break;
case 1: /* Main Clock */
if ((mcfr & CKGR_MCFR_MAINRDY) &&
(at91sam7_info->ext_freq == 0)) {
at91sam7_info->mck_valid = 1;
tmp = RC_FREQ / 16ul * (mcfr & 0xffff);
} else if (at91sam7_info->ext_freq != 0) {
at91sam7_info->mck_valid = 1;
tmp = at91sam7_info->ext_freq;
}
break;
case 2: /* Reserved */
break;
case 3: /* PLL Clock */
if ((mcfr & CKGR_MCFR_MAINRDY) &&
(at91sam7_info->ext_freq == 0)) {
target_read_u32(target, CKGR_PLLR, &pllr);
if (!(pllr & CKGR_PLLR_DIV))
break; /* 0 Hz */
at91sam7_info->mck_valid = 1;
mainfreq = RC_FREQ / 16ul * (mcfr & 0xffff);
/* Integer arithmetic should have sufficient precision
* as long as PLL is properly configured. */
tmp = mainfreq / (pllr & CKGR_PLLR_DIV)*
(((pllr & CKGR_PLLR_MUL) >> 16) + 1);
} else if ((at91sam7_info->ext_freq != 0) &&
((pllr&CKGR_PLLR_DIV) != 0)) {
at91sam7_info->mck_valid = 1;
tmp = at91sam7_info->ext_freq / (pllr&CKGR_PLLR_DIV)*
(((pllr & CKGR_PLLR_MUL) >> 16) + 1);
}
break;
}
/* Prescaler adjust */
if ((((mckr & PMC_MCKR_PRES) >> 2) == 7) || (tmp == 0)) {
at91sam7_info->mck_valid = 0;
at91sam7_info->mck_freq = 0;
} else if (((mckr & PMC_MCKR_PRES) >> 2) != 0)
at91sam7_info->mck_freq = tmp >> ((mckr & PMC_MCKR_PRES) >> 2);
else
at91sam7_info->mck_freq = tmp;
}
/* Setup the timimg registers for nvbits or normal flash */
static void at91sam7_set_flash_mode(struct flash_bank *bank, int mode)
{
uint32_t fmr, fmcn = 0, fws = 0;
struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
struct target *target = bank->target;
if (mode && (mode != at91sam7_info->flashmode)) {
/* Always round up (ceil) */
if (mode == FMR_TIMING_NVBITS) {
if (at91sam7_info->cidr_arch == 0x60) {
/* AT91SAM7A3 uses master clocks in 100 ns */
fmcn = (at91sam7_info->mck_freq/10000000ul) + 1;
} else {
/* master clocks in 1uS for ARCH 0x7 types */
fmcn = (at91sam7_info->mck_freq/1000000ul) + 1;
}
} else if (mode == FMR_TIMING_FLASH) {
/* main clocks in 1.5uS */
fmcn = (at91sam7_info->mck_freq/1000000ul)+
(at91sam7_info->mck_freq/2000000ul) + 1;
}
/* hard overclocking */
if (fmcn > 0xFF)
fmcn = 0xFF;
/* Only allow fmcn = 0 if clock period is > 30 us = 33kHz. */
if (at91sam7_info->mck_freq <= 33333ul)
fmcn = 0;
/* Only allow fws = 0 if clock frequency is < 30 MHz. */
if (at91sam7_info->mck_freq > 30000000ul)
fws = 1;
LOG_DEBUG("fmcn[%i]: %i", bank->bank_number, (int)(fmcn));
fmr = fmcn << 16 | fws << 8;
target_write_u32(target, MC_FMR[bank->bank_number], fmr);
}
at91sam7_info->flashmode = mode;
}
static uint32_t at91sam7_wait_status_busy(struct flash_bank *bank, uint32_t waitbits, int timeout)
{
uint32_t status;
while ((!((status = at91sam7_get_flash_status(bank->target,
bank->bank_number)) & waitbits)) && (timeout-- > 0)) {
LOG_DEBUG("status[%i]: 0x%" PRIx32 "", (int)bank->bank_number, status);
alive_sleep(1);
}
LOG_DEBUG("status[%i]: 0x%" PRIx32 "", bank->bank_number, status);
if (status & 0x0C) {
LOG_ERROR("status register: 0x%" PRIx32 "", status);
if (status & 0x4)
LOG_ERROR("Lock Error Bit Detected, Operation Abort");
if (status & 0x8)
LOG_ERROR("Invalid command and/or bad keyword, Operation Abort");
if (status & 0x10)
LOG_ERROR("Security Bit Set, Operation Abort");
}
return status;
}
/* Send one command to the AT91SAM flash controller */
static int at91sam7_flash_command(struct flash_bank *bank, uint8_t cmd, uint16_t pagen)
{
uint32_t fcr;
struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
struct target *target = bank->target;
fcr = (0x5A << 24) | ((pagen&0x3FF) << 8) | cmd;
target_write_u32(target, MC_FCR[bank->bank_number], fcr);
LOG_DEBUG("Flash command: 0x%" PRIx32 ", flash bank: %i, page number: %u",
fcr,
bank->bank_number + 1,
pagen);
if ((at91sam7_info->cidr_arch == 0x60) && ((cmd == SLB) | (cmd == CLB))) {
/* Lock bit manipulation on AT91SAM7A3 waits for FC_FSR bit 1, EOL */
if (at91sam7_wait_status_busy(bank, MC_FSR_EOL, 10)&0x0C)
return ERROR_FLASH_OPERATION_FAILED;
return ERROR_OK;
}
if (at91sam7_wait_status_busy(bank, MC_FSR_FRDY, 10)&0x0C)
return ERROR_FLASH_OPERATION_FAILED;
return ERROR_OK;
}
/* Read device id register, main clock frequency register and fill in driver info structure */
static int at91sam7_read_part_info(struct flash_bank *bank)
{
struct at91sam7_flash_bank *at91sam7_info;
struct target *target = bank->target;
uint16_t bnk, sec;
uint16_t arch;
uint32_t cidr;
uint8_t banks_num = 0;
uint16_t num_nvmbits = 0;
uint16_t sectors_num = 0;
uint16_t pages_per_sector = 0;
uint16_t page_size = 0;
uint32_t ext_freq;
uint32_t bank_size;
uint32_t base_address = 0;
char *target_name_t = "Unknown";
at91sam7_info = bank->driver_priv;
if (at91sam7_info->cidr != 0) {
/* flash already configured, update clock and check for protected sectors */
struct flash_bank *fb = bank;
struct flash_bank *t_bank = bank;
while (t_bank) {
/* re-calculate master clock frequency */
at91sam7_read_clock_info(t_bank);
/* no timming */
at91sam7_set_flash_mode(t_bank, FMR_TIMING_NONE);
/* check protect state */
at91sam7_protect_check(t_bank);
t_bank = fb->next;
fb = t_bank;
}
return ERROR_OK;
}
/* Read and parse chip identification register */
target_read_u32(target, DBGU_CIDR, &cidr);
if (cidr == 0) {
LOG_WARNING("Cannot identify target as an AT91SAM");
return ERROR_FLASH_OPERATION_FAILED;
}
if (at91sam7_info->flash_autodetection == 0) {
/* banks and sectors are already created, based on data from input file */
struct flash_bank *fb = bank;
struct flash_bank *t_bank = bank;
while (t_bank) {
at91sam7_info = t_bank->driver_priv;
at91sam7_info->cidr = cidr;
at91sam7_info->cidr_ext = (cidr >> 31)&0x0001;
at91sam7_info->cidr_nvptyp = (cidr >> 28)&0x0007;
at91sam7_info->cidr_arch = (cidr >> 20)&0x00FF;
at91sam7_info->cidr_sramsiz = (cidr >> 16)&0x000F;
at91sam7_info->cidr_nvpsiz2 = (cidr >> 12)&0x000F;
at91sam7_info->cidr_nvpsiz = (cidr >> 8)&0x000F;
at91sam7_info->cidr_eproc = (cidr >> 5)&0x0007;
at91sam7_info->cidr_version = cidr&0x001F;
/* calculate master clock frequency */
at91sam7_read_clock_info(t_bank);
/* no timming */
at91sam7_set_flash_mode(t_bank, FMR_TIMING_NONE);
/* check protect state */
at91sam7_protect_check(t_bank);
t_bank = fb->next;
fb = t_bank;
}
return ERROR_OK;
}
arch = (cidr >> 20)&0x00FF;
/* check flash size */
switch ((cidr >> 8)&0x000F) {
case FLASH_SIZE_8KB:
break;
case FLASH_SIZE_16KB:
banks_num = 1;
sectors_num = 8;
pages_per_sector = 32;
page_size = 64;
base_address = 0x00100000;
if (arch == 0x70) {
num_nvmbits = 2;
target_name_t = "AT91SAM7S161/16";
}
break;
case FLASH_SIZE_32KB:
banks_num = 1;
sectors_num = 8;
pages_per_sector = 32;
page_size = 128;
base_address = 0x00100000;
if (arch == 0x70) {
num_nvmbits = 2;
target_name_t = "AT91SAM7S321/32";
}
if (arch == 0x72) {
num_nvmbits = 3;
target_name_t = "AT91SAM7SE32";
}
break;
case FLASH_SIZE_64KB:
banks_num = 1;
sectors_num = 16;
pages_per_sector = 32;
page_size = 128;
base_address = 0x00100000;
if (arch == 0x70) {
num_nvmbits = 2;
target_name_t = "AT91SAM7S64";
}
break;
case FLASH_SIZE_128KB:
banks_num = 1;
sectors_num = 8;
pages_per_sector = 64;
page_size = 256;
base_address = 0x00100000;
if (arch == 0x70) {
num_nvmbits = 2;
target_name_t = "AT91SAM7S128";
}
if (arch == 0x71) {
num_nvmbits = 3;
target_name_t = "AT91SAM7XC128";
}
if (arch == 0x72) {
num_nvmbits = 3;
target_name_t = "AT91SAM7SE128";
}
if (arch == 0x75) {
num_nvmbits = 3;
target_name_t = "AT91SAM7X128";
}
break;
case FLASH_SIZE_256KB:
banks_num = 1;
sectors_num = 16;
pages_per_sector = 64;
page_size = 256;
base_address = 0x00100000;
if (arch == 0x60) {
num_nvmbits = 3;
target_name_t = "AT91SAM7A3";
}
if (arch == 0x70) {
num_nvmbits = 2;
target_name_t = "AT91SAM7S256";
}
if (arch == 0x71) {
num_nvmbits = 3;
target_name_t = "AT91SAM7XC256";
}
if (arch == 0x72) {
num_nvmbits = 3;
target_name_t = "AT91SAM7SE256";
}
if (arch == 0x75) {
num_nvmbits = 3;
target_name_t = "AT91SAM7X256";
}
break;
case FLASH_SIZE_512KB:
banks_num = 2;
sectors_num = 16;
pages_per_sector = 64;
page_size = 256;
base_address = 0x00100000;
if (arch == 0x70) {
num_nvmbits = 2;
target_name_t = "AT91SAM7S512";
}
if (arch == 0x71) {
num_nvmbits = 3;
target_name_t = "AT91SAM7XC512";
}
if (arch == 0x72) {
num_nvmbits = 3;
target_name_t = "AT91SAM7SE512";
}
if (arch == 0x75) {
num_nvmbits = 3;
target_name_t = "AT91SAM7X512";
}
break;
case FLASH_SIZE_1024KB:
break;
case FLASH_SIZE_2048KB:
break;
}
if (strcmp(target_name_t, "Unknown") == 0) {
LOG_ERROR(
"Target autodetection failed! Please specify target parameters in configuration file");
return ERROR_FLASH_OPERATION_FAILED;
}
ext_freq = at91sam7_info->ext_freq;
/* calculate bank size */
bank_size = sectors_num * pages_per_sector * page_size;
for (bnk = 0; bnk < banks_num; bnk++) {
struct flash_bank *t_bank = bank;
if (bnk > 0) {
if (!t_bank->next) {
/* create a new flash bank element */
struct flash_bank *fb = malloc(sizeof(struct flash_bank));
fb->target = target;
fb->driver = bank->driver;
fb->driver_priv = malloc(sizeof(struct at91sam7_flash_bank));
fb->name = "sam7_probed";
fb->next = NULL;
/* link created bank in 'flash_banks' list */
t_bank->next = fb;
}
t_bank = t_bank->next;
}
t_bank->bank_number = bnk;
t_bank->base = base_address + bnk * bank_size;
t_bank->size = bank_size;
t_bank->chip_width = 0;
t_bank->bus_width = 4;
t_bank->num_sectors = sectors_num;
/* allocate sectors */
t_bank->sectors = malloc(sectors_num * sizeof(struct flash_sector));
for (sec = 0; sec < sectors_num; sec++) {
t_bank->sectors[sec].offset = sec * pages_per_sector * page_size;
t_bank->sectors[sec].size = pages_per_sector * page_size;
t_bank->sectors[sec].is_erased = -1;
t_bank->sectors[sec].is_protected = -1;
}
at91sam7_info = t_bank->driver_priv;
at91sam7_info->cidr = cidr;
at91sam7_info->cidr_ext = (cidr >> 31)&0x0001;
at91sam7_info->cidr_nvptyp = (cidr >> 28)&0x0007;
at91sam7_info->cidr_arch = (cidr >> 20)&0x00FF;
at91sam7_info->cidr_sramsiz = (cidr >> 16)&0x000F;
at91sam7_info->cidr_nvpsiz2 = (cidr >> 12)&0x000F;
at91sam7_info->cidr_nvpsiz = (cidr >> 8)&0x000F;
at91sam7_info->cidr_eproc = (cidr >> 5)&0x0007;
at91sam7_info->cidr_version = cidr&0x001F;
at91sam7_info->target_name = target_name_t;
at91sam7_info->flashmode = 0;
at91sam7_info->ext_freq = ext_freq;
at91sam7_info->num_nvmbits = num_nvmbits;
at91sam7_info->num_nvmbits_on = 0;
at91sam7_info->pagesize = page_size;
at91sam7_info->pages_per_sector = pages_per_sector;
/* calculate master clock frequency */
at91sam7_read_clock_info(t_bank);
/* no timming */
at91sam7_set_flash_mode(t_bank, FMR_TIMING_NONE);
/* check protect state */
at91sam7_protect_check(t_bank);
}
LOG_DEBUG("nvptyp: 0x%3.3x, arch: 0x%4.4x",
at91sam7_info->cidr_nvptyp,
at91sam7_info->cidr_arch);
return ERROR_OK;
}
static int at91sam7_erase_check(struct flash_bank *bank)
{
struct target *target = bank->target;
uint16_t retval;
uint32_t blank;
uint16_t fast_check;
uint8_t *buffer;
uint16_t nSector;
uint16_t nByte;
if (bank->target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
/* Configure the flash controller timing */
at91sam7_read_clock_info(bank);
at91sam7_set_flash_mode(bank, FMR_TIMING_FLASH);
fast_check = 1;
for (nSector = 0; nSector < bank->num_sectors; nSector++) {
retval = target_blank_check_memory(target,
bank->base + bank->sectors[nSector].offset,
bank->sectors[nSector].size,
&blank);
if (retval != ERROR_OK) {
fast_check = 0;
break;
}
if (blank == 0xFF)
bank->sectors[nSector].is_erased = 1;
else
bank->sectors[nSector].is_erased = 0;
}
if (fast_check)
return ERROR_OK;
LOG_USER("Running slow fallback erase check - add working memory");
buffer = malloc(bank->sectors[0].size);
for (nSector = 0; nSector < bank->num_sectors; nSector++) {
bank->sectors[nSector].is_erased = 1;
retval = target_read_memory(target, bank->base + bank->sectors[nSector].offset, 4,
bank->sectors[nSector].size/4, buffer);
if (retval != ERROR_OK)
return retval;
for (nByte = 0; nByte < bank->sectors[nSector].size; nByte++) {
if (buffer[nByte] != 0xFF) {
bank->sectors[nSector].is_erased = 0;
break;
}
}
}
free(buffer);
return ERROR_OK;
}
static int at91sam7_protect_check(struct flash_bank *bank)
{
uint8_t lock_pos, gpnvm_pos;
uint32_t status;
struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
if (at91sam7_info->cidr == 0)
return ERROR_FLASH_BANK_NOT_PROBED;
if (bank->target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
status = at91sam7_get_flash_status(bank->target, bank->bank_number);
at91sam7_info->lockbits = (status >> 16);
at91sam7_info->num_lockbits_on = 0;
for (lock_pos = 0; lock_pos < bank->num_sectors; lock_pos++) {
if (((status >> (16 + lock_pos))&(0x0001)) == 1) {
at91sam7_info->num_lockbits_on++;
bank->sectors[lock_pos].is_protected = 1;
} else
bank->sectors[lock_pos].is_protected = 0;
}
/* GPNVM and SECURITY bits apply only for MC_FSR of EFC0 */
status = at91sam7_get_flash_status(bank->target, 0);
at91sam7_info->securitybit = (status >> 4)&0x01;
at91sam7_info->nvmbits = (status >> 8)&0xFF;
at91sam7_info->num_nvmbits_on = 0;
for (gpnvm_pos = 0; gpnvm_pos < at91sam7_info->num_nvmbits; gpnvm_pos++) {
if (((status >> (8 + gpnvm_pos))&(0x01)) == 1)
at91sam7_info->num_nvmbits_on++;
}
return ERROR_OK;
}
FLASH_BANK_COMMAND_HANDLER(at91sam7_flash_bank_command)
{
struct flash_bank *t_bank = bank;
struct at91sam7_flash_bank *at91sam7_info;
struct target *target = t_bank->target;
uint32_t base_address;
uint32_t bank_size;
uint32_t ext_freq = 0;
int chip_width;
int bus_width;
int banks_num;
int num_sectors;
uint16_t pages_per_sector;
uint16_t page_size;
uint16_t num_nvmbits;
char *target_name_t;
int bnk, sec;
at91sam7_info = malloc(sizeof(struct at91sam7_flash_bank));
t_bank->driver_priv = at91sam7_info;
/* part wasn't probed for info yet */
at91sam7_info->cidr = 0;
at91sam7_info->flashmode = 0;
at91sam7_info->ext_freq = 0;
at91sam7_info->flash_autodetection = 0;
if (CMD_ARGC < 13) {
at91sam7_info->flash_autodetection = 1;
return ERROR_OK;
}
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], base_address);
COMMAND_PARSE_NUMBER(int, CMD_ARGV[3], chip_width);
COMMAND_PARSE_NUMBER(int, CMD_ARGV[4], bus_width);
COMMAND_PARSE_NUMBER(int, CMD_ARGV[8], banks_num);
COMMAND_PARSE_NUMBER(int, CMD_ARGV[9], num_sectors);
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[10], pages_per_sector);
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[11], page_size);
COMMAND_PARSE_NUMBER(u16, CMD_ARGV[12], num_nvmbits);
if (CMD_ARGC == 14) {
unsigned long freq;
COMMAND_PARSE_NUMBER(ulong, CMD_ARGV[13], freq);
ext_freq = freq * 1000;
at91sam7_info->ext_freq = ext_freq;
}
if ((bus_width == 0) || (banks_num == 0) || (num_sectors == 0) ||
(pages_per_sector == 0) || (page_size == 0) || (num_nvmbits == 0)) {
at91sam7_info->flash_autodetection = 1;
return ERROR_OK;
}
target_name_t = calloc(strlen(CMD_ARGV[7]) + 1, sizeof(char));
strcpy(target_name_t, CMD_ARGV[7]);
/* calculate bank size */
bank_size = num_sectors * pages_per_sector * page_size;
for (bnk = 0; bnk < banks_num; bnk++) {
if (bnk > 0) {
if (!t_bank->next) {
/* create a new bank element */
struct flash_bank *fb = malloc(sizeof(struct flash_bank));
fb->target = target;
fb->driver = bank->driver;
fb->driver_priv = malloc(sizeof(struct at91sam7_flash_bank));
fb->name = "sam7_probed";
fb->next = NULL;
/* link created bank in 'flash_banks' list */
t_bank->next = fb;
}
t_bank = t_bank->next;
}
t_bank->bank_number = bnk;
t_bank->base = base_address + bnk * bank_size;
t_bank->size = bank_size;
t_bank->chip_width = chip_width;
t_bank->bus_width = bus_width;
t_bank->num_sectors = num_sectors;
/* allocate sectors */
t_bank->sectors = malloc(num_sectors * sizeof(struct flash_sector));
for (sec = 0; sec < num_sectors; sec++) {
t_bank->sectors[sec].offset = sec * pages_per_sector * page_size;
t_bank->sectors[sec].size = pages_per_sector * page_size;
t_bank->sectors[sec].is_erased = -1;
t_bank->sectors[sec].is_protected = -1;
}
at91sam7_info = t_bank->driver_priv;
at91sam7_info->target_name = target_name_t;
at91sam7_info->flashmode = 0;
at91sam7_info->ext_freq = ext_freq;
at91sam7_info->num_nvmbits = num_nvmbits;
at91sam7_info->num_nvmbits_on = 0;
at91sam7_info->pagesize = page_size;
at91sam7_info->pages_per_sector = pages_per_sector;
}
return ERROR_OK;
}
static int at91sam7_erase(struct flash_bank *bank, int first, int last)
{
struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
int sec;
uint32_t nbytes, pos;
uint8_t *buffer;
uint8_t erase_all;
if (at91sam7_info->cidr == 0)
return ERROR_FLASH_BANK_NOT_PROBED;
if (bank->target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
if ((first < 0) || (last < first) || (last >= bank->num_sectors))
return ERROR_FLASH_SECTOR_INVALID;
erase_all = 0;
if ((first == 0) && (last == (bank->num_sectors-1)))
erase_all = 1;
/* Configure the flash controller timing */
at91sam7_read_clock_info(bank);
at91sam7_set_flash_mode(bank, FMR_TIMING_FLASH);
if (erase_all) {
if (at91sam7_flash_command(bank, EA, 0) != ERROR_OK)
return ERROR_FLASH_OPERATION_FAILED;
} else {
/* allocate and clean buffer */
nbytes = (last - first + 1) * bank->sectors[first].size;
buffer = malloc(nbytes * sizeof(uint8_t));
for (pos = 0; pos < nbytes; pos++)
buffer[pos] = 0xFF;
if (at91sam7_write(bank, buffer, bank->sectors[first].offset, nbytes) != ERROR_OK) {
free(buffer);
return ERROR_FLASH_OPERATION_FAILED;
}
free(buffer);
}
/* mark erased sectors */
for (sec = first; sec <= last; sec++)
bank->sectors[sec].is_erased = 1;
return ERROR_OK;
}
static int at91sam7_protect(struct flash_bank *bank, int set, int first, int last)
{
uint32_t cmd;
int sector;
uint32_t pagen;
struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
if (at91sam7_info->cidr == 0)
return ERROR_FLASH_BANK_NOT_PROBED;
if (bank->target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
if ((first < 0) || (last < first) || (last >= bank->num_sectors))
return ERROR_FLASH_SECTOR_INVALID;
/* Configure the flash controller timing */
at91sam7_read_clock_info(bank);
at91sam7_set_flash_mode(bank, FMR_TIMING_NVBITS);
for (sector = first; sector <= last; sector++) {
if (set)
cmd = SLB;
else
cmd = CLB;
/* if we lock a page from one sector then entire sector will be locked, also,
* if we unlock a page from a locked sector, entire sector will be unlocked */
pagen = sector * at91sam7_info->pages_per_sector;
if (at91sam7_flash_command(bank, cmd, pagen) != ERROR_OK)
return ERROR_FLASH_OPERATION_FAILED;
}
at91sam7_protect_check(bank);
return ERROR_OK;
}
static int at91sam7_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offset, uint32_t count)
{
int retval;
struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
struct target *target = bank->target;
uint32_t dst_min_alignment, wcount, bytes_remaining = count;
uint32_t first_page, last_page, pagen, buffer_pos;
if (at91sam7_info->cidr == 0)
return ERROR_FLASH_BANK_NOT_PROBED;
if (bank->target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
if (offset + count > bank->size)
return ERROR_FLASH_DST_OUT_OF_BANK;
dst_min_alignment = at91sam7_info->pagesize;
if (offset % dst_min_alignment) {
LOG_WARNING("offset 0x%" PRIx32 " breaks required alignment 0x%" PRIx32 "",
offset,
dst_min_alignment);
return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
}
if (at91sam7_info->cidr_arch == 0)
return ERROR_FLASH_BANK_NOT_PROBED;
first_page = offset/dst_min_alignment;
last_page = DIV_ROUND_UP(offset + count, dst_min_alignment);
LOG_DEBUG("first_page: %i, last_page: %i, count %i",
(int)first_page,
(int)last_page,
(int)count);
/* Configure the flash controller timing */
at91sam7_read_clock_info(bank);
at91sam7_set_flash_mode(bank, FMR_TIMING_FLASH);
for (pagen = first_page; pagen < last_page; pagen++) {
if (bytes_remaining < dst_min_alignment)
count = bytes_remaining;
else
count = dst_min_alignment;
bytes_remaining -= count;
/* Write one block to the PageWriteBuffer */
buffer_pos = (pagen-first_page)*dst_min_alignment;
wcount = DIV_ROUND_UP(count, 4);
retval = target_write_memory(target, bank->base + pagen*dst_min_alignment, 4,
wcount, buffer + buffer_pos);
if (retval != ERROR_OK)
return retval;
/* Send Write Page command to Flash Controller */
if (at91sam7_flash_command(bank, WP, pagen) != ERROR_OK)
return ERROR_FLASH_OPERATION_FAILED;
LOG_DEBUG("Write flash bank:%i page number:%" PRIi32 "", bank->bank_number, pagen);
}
return ERROR_OK;
}
static int at91sam7_probe(struct flash_bank *bank)
{
/* we can't probe on an at91sam7
* if this is an at91sam7, it has the configured flash */
int retval;
if (bank->target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
retval = at91sam7_read_part_info(bank);
if (retval != ERROR_OK)
return retval;
return ERROR_OK;
}
static int get_at91sam7_info(struct flash_bank *bank, char *buf, int buf_size)
{
int printed;
struct at91sam7_flash_bank *at91sam7_info = bank->driver_priv;
if (at91sam7_info->cidr == 0)
return ERROR_FLASH_BANK_NOT_PROBED;
printed = snprintf(buf, buf_size,
"\n at91sam7 driver information: Chip is %s\n",
at91sam7_info->target_name);
buf += printed;
buf_size -= printed;
printed = snprintf(buf,
buf_size,
" Cidr: 0x%8.8" PRIx32 " | Arch: 0x%4.4x | Eproc: %s | Version: 0x%3.3x | "
"Flashsize: 0x%8.8" PRIx32 "\n",
at91sam7_info->cidr,
at91sam7_info->cidr_arch,
EPROC[at91sam7_info->cidr_eproc],
at91sam7_info->cidr_version,
bank->size);
buf += printed;
buf_size -= printed;
printed = snprintf(buf, buf_size,
" Master clock (estimated): %u KHz | External clock: %u KHz\n",
(unsigned)(at91sam7_info->mck_freq / 1000),
(unsigned)(at91sam7_info->ext_freq / 1000));
buf += printed;
buf_size -= printed;
printed = snprintf(buf,
buf_size,
" Pagesize: %i bytes | Lockbits(%i): %i 0x%4.4x | Pages in lock region: %i\n",
at91sam7_info->pagesize,
bank->num_sectors,
at91sam7_info->num_lockbits_on,
at91sam7_info->lockbits,
at91sam7_info->pages_per_sector*at91sam7_info->num_lockbits_on);
buf += printed;
buf_size -= printed;
snprintf(buf, buf_size,
" Securitybit: %i | Nvmbits(%i): %i 0x%1.1x\n",
at91sam7_info->securitybit, at91sam7_info->num_nvmbits,
at91sam7_info->num_nvmbits_on, at91sam7_info->nvmbits);
return ERROR_OK;
}
/*
* On AT91SAM7S: When the gpnvm bits are set with
* > at91sam7 gpnvm bitnr set
* the changes are not visible in the flash controller status register MC_FSR
* until the processor has been reset.
* On the Olimex board this requires a power cycle.
* Note that the AT91SAM7S has the following errata (doc6175.pdf sec 14.1.3):
* The maximum number of write/erase cycles for Non volatile Memory bits is 100. this includes
* Lock Bits (LOCKx), General Purpose NVM bits (GPNVMx) and the Security Bit.
*/
COMMAND_HANDLER(at91sam7_handle_gpnvm_command)
{
struct flash_bank *bank;
int bit;
uint8_t flashcmd;
uint32_t status;
struct at91sam7_flash_bank *at91sam7_info;
int retval;
if (CMD_ARGC != 2)
return ERROR_COMMAND_SYNTAX_ERROR;
bank = get_flash_bank_by_num_noprobe(0);
if (bank == NULL)
return ERROR_FLASH_BANK_INVALID;
if (strcmp(bank->driver->name, "at91sam7")) {
command_print(CMD_CTX, "not an at91sam7 flash bank '%s'", CMD_ARGV[0]);
return ERROR_FLASH_BANK_INVALID;
}
if (bank->target->state != TARGET_HALTED) {
LOG_ERROR("target has to be halted to perform flash operation");
return ERROR_TARGET_NOT_HALTED;
}
if (strcmp(CMD_ARGV[1], "set") == 0)
flashcmd = SGPB;
else if (strcmp(CMD_ARGV[1], "clear") == 0)
flashcmd = CGPB;
else
return ERROR_COMMAND_SYNTAX_ERROR;
at91sam7_info = bank->driver_priv;
if (at91sam7_info->cidr == 0) {
retval = at91sam7_read_part_info(bank);
if (retval != ERROR_OK)
return retval;
}
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], bit);
if ((bit < 0) || (bit >= at91sam7_info->num_nvmbits)) {
command_print(CMD_CTX,
"gpnvm bit '#%s' is out of bounds for target %s",
CMD_ARGV[0],
at91sam7_info->target_name);
return ERROR_OK;
}
/* Configure the flash controller timing */
at91sam7_read_clock_info(bank);
at91sam7_set_flash_mode(bank, FMR_TIMING_NVBITS);
if (at91sam7_flash_command(bank, flashcmd, bit) != ERROR_OK)
return ERROR_FLASH_OPERATION_FAILED;
/* GPNVM and SECURITY bits apply only for MC_FSR of EFC0 */
status = at91sam7_get_flash_status(bank->target, 0);
LOG_DEBUG("at91sam7_handle_gpnvm_command: cmd 0x%x, value %d, status 0x%" PRIx32,
flashcmd,
bit,
status);
/* check protect state */
at91sam7_protect_check(bank);
return ERROR_OK;
}
static const struct command_registration at91sam7_exec_command_handlers[] = {
{
.name = "gpnvm",
.handler = at91sam7_handle_gpnvm_command,
.mode = COMMAND_EXEC,
.help = "set or clear one General Purpose Non-Volatile Memory "
"(gpnvm) bit",
.usage = "bitnum ('set'|'clear')",
},
COMMAND_REGISTRATION_DONE
};
static const struct command_registration at91sam7_command_handlers[] = {
{
.name = "at91sam7",
.mode = COMMAND_ANY,
.help = "at91sam7 flash command group",
.usage = "",
.chain = at91sam7_exec_command_handlers,
},
COMMAND_REGISTRATION_DONE
};
struct flash_driver at91sam7_flash = {
.name = "at91sam7",
.usage = "gpnvm <bit> <set | clear>",
.commands = at91sam7_command_handlers,
.flash_bank_command = at91sam7_flash_bank_command,
.erase = at91sam7_erase,
.protect = at91sam7_protect,
.write = at91sam7_write,
.read = default_flash_read,
.probe = at91sam7_probe,
.auto_probe = at91sam7_probe,
.erase_check = at91sam7_erase_check,
.protect_check = at91sam7_protect_check,
.info = get_at91sam7_info,
};
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