flash/nor/nrf5: show RAM size on old nRF51 devices (rev 1, 2)

Change-Id: I2452c084b9bd9e401bd49e15791428a53df1cd1d
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/4868
Tested-by: jenkins

diff --git a/src/flash/nor/nrf5.c b/src/flash/nor/nrf5.c
index c19c4eabb05f741867f6928ef36b736737b9fa6d..dac08bd4aa0b635d4061940ebf6f0d90ea82c5c2 100644 (file)
--- a/src/flash/nor/nrf5.c
+++ b/src/flash/nor/nrf5.c
@@ -157,6 +157,7 @@ struct nrf5_info {
        uint32_t hwid;
        enum nrf5_features features;
        unsigned int flash_size_kb;
+       unsigned int ram_size_kb;
 };
 
 #define NRF51_DEVICE_DEF(id, pt, var, bcode, fsize) \
@@ -589,29 +590,31 @@ static int nrf5_info(struct flash_bank *bank, char *buf, int buf_size)
 {
        struct nrf5_bank *nbank = bank->driver_priv;
        struct nrf5_info *chip = nbank->chip;
+       int res;
 
        if (chip->spec) {
-               snprintf(buf, buf_size,
-                               "nRF%s-%s(build code: %s) %ukB Flash",
-                               chip->spec->part, chip->spec->variant, chip->spec->build_code,
-                               chip->flash_size_kb);
+               res = snprintf(buf, buf_size,
+                               "nRF%s-%s(build code: %s)",
+                               chip->spec->part, chip->spec->variant, chip->spec->build_code);
 
        } else if (chip->ficr_info_valid) {
                char variant[5];
                nrf5_info_variant_to_str(chip->ficr_info.variant, variant);
-               snprintf(buf, buf_size,
-                               "nRF%" PRIx32 "-%s%.2s(build code: %s) %" PRIu32
-                               "kB Flash, %" PRIu32 "kB RAM",
+               res = snprintf(buf, buf_size,
+                               "nRF%" PRIx32 "-%s%.2s(build code: %s)",
                                chip->ficr_info.part,
                                nrf5_decode_info_package(chip->ficr_info.package),
-                               variant, &variant[2],
-                               chip->flash_size_kb,
-                               chip->ficr_info.ram);
+                               variant, &variant[2]);
 
        } else {
-               snprintf(buf, buf_size, "nRF51xxx (HWID 0x%04" PRIx16 ") %ukB Flash",
-                               chip->hwid, chip->flash_size_kb);
+               res = snprintf(buf, buf_size, "nRF51xxx (HWID 0x%04" PRIx16 ")",
+                               chip->hwid);
        }
+       if (res <= 0)
+               return ERROR_FAIL;
+
+       snprintf(buf + res, buf_size - res, " %ukB Flash, %ukB RAM",
+                               chip->flash_size_kb, chip->ram_size_kb);
        return ERROR_OK;
 }
 
@@ -681,6 +684,39 @@ static int nrf5_read_ficr_info(struct nrf5_info *chip)
        return ERROR_OK;
 }
 
+static int nrf5_get_ram_size(struct target *target, uint32_t *ram_size)
+{
+       int res;
+
+       *ram_size = 0;
+
+       uint32_t numramblock;
+       res = target_read_u32(target, NRF51_FICR_NUMRAMBLOCK, &numramblock);
+       if (res != ERROR_OK) {
+               LOG_DEBUG("Couldn't read FICR NUMRAMBLOCK register");
+               return res;
+       }
+
+       if (numramblock < 1 || numramblock > 4) {
+               LOG_DEBUG("FICR NUMRAMBLOCK strange value %" PRIx32, numramblock);
+               return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+       }
+
+       for (unsigned int i = 0; i < numramblock; i++) {
+               uint32_t sizeramblock;
+               res = target_read_u32(target, NRF51_FICR_SIZERAMBLOCK0 + sizeof(uint32_t)*i, &sizeramblock);
+               if (res != ERROR_OK) {
+                       LOG_DEBUG("Couldn't read FICR NUMRAMBLOCK register");
+                       return res;
+               }
+               if (sizeramblock < 1024 || sizeramblock > 65536)
+                       LOG_DEBUG("FICR SIZERAMBLOCK strange value %" PRIx32, sizeramblock);
+               else
+                       *ram_size += sizeramblock;
+       }
+       return res;
+}
+
 static int nrf5_probe(struct flash_bank *bank)
 {
        int res;
@@ -720,6 +756,14 @@ static int nrf5_probe(struct flash_bank *bank)
                                                PRIx32, chip->hwid, chip->ficr_info.part);
        }
 
+       if (chip->ficr_info_valid) {
+               chip->ram_size_kb = chip->ficr_info.ram;
+       } else {
+               uint32_t ram_size;
+               nrf5_get_ram_size(target, &ram_size);
+               chip->ram_size_kb = ram_size / 1024;
+       }
+
        /* The value stored in NRF5_FICR_CODEPAGESIZE is the number of bytes in one page of FLASH. */
        uint32_t flash_page_size;
        res = target_read_u32(chip->target, NRF5_FICR_CODEPAGESIZE,