flash: cleanup stellaris device class detection

read the target class during probe and save for later use.

Change-Id: Ib3ad20edc7d206b7f434bdcc6b947e6a5f06dd1f
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Reviewed-on: http://openocd.zylin.com/388
Tested-by: jenkins

diff --git a/src/flash/nor/stellaris.c b/src/flash/nor/stellaris.c
index 9645c5fe5d287e1ac8052468cea63e3916d8ff7a..69a9d05f89c25aa127df999959c3b6a3b6064213 100644 (file)
--- a/src/flash/nor/stellaris.c
+++ b/src/flash/nor/stellaris.c
@@ -24,6 +24,7 @@
 /***************************************************************************
 * STELLARIS flash is tested on LM3S811, LM3S6965, LM3s3748, more.
 ***************************************************************************/
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
@@ -32,7 +33,6 @@
 #include <target/algorithm.h>
 #include <target/armv7m.h>
 
-
 #define DID0_VER(did0) ((did0 >> 28)&0x07)
 
 /* STELLARIS control registers */
@@ -88,7 +88,6 @@
 #define FLASH_FMA_PRE(x)       (2 * (x))       /* for FMPPREx */
 #define FLASH_FMA_PPE(x)       (2 * (x) + 1)   /* for FMPPPEx */
 
-
 static void stellaris_read_clock_info(struct flash_bank *bank);
 static int stellaris_mass_erase(struct flash_bank *bank);
 
@@ -101,6 +100,7 @@ struct stellaris_flash_bank
        uint32_t dc1;
 
        const char * target_name;
+       uint8_t target_class;
 
        uint32_t sramsiz;
        uint32_t flshsz;
@@ -459,7 +459,7 @@ FLASH_BANK_COMMAND_HANDLER(stellaris_flash_bank_command)
 
 static int get_stellaris_info(struct flash_bank *bank, char *buf, int buf_size)
 {
-       int printed, device_class;
+       int printed;
        struct stellaris_flash_bank *stellaris_info = bank->driver_priv;
 
        if (stellaris_info->did1 == 0)
@@ -468,20 +468,12 @@ static int get_stellaris_info(struct flash_bank *bank, char *buf, int buf_size)
        /* Read main and master clock freqency register */
        stellaris_read_clock_info(bank);
 
-       if (DID0_VER(stellaris_info->did0) > 0)
-       {
-               device_class = (stellaris_info->did0 >> 16) & 0xFF;
-       }
-       else
-       {
-               device_class = 0;
-       }
        printed = snprintf(buf,
                           buf_size,
                           "\nTI/LMI Stellaris information: Chip is "
                           "class %i (%s) %s rev %c%i\n",
-                          device_class,
-                          StellarisClassname[device_class],
+                          stellaris_info->target_class,
+                          StellarisClassname[stellaris_info->target_class],
                           stellaris_info->target_name,
                           (int)('A' + ((stellaris_info->did0 >> 8) & 0xFF)),
                           (int)((stellaris_info->did0) & 0xFF));
@@ -707,44 +699,48 @@ static int stellaris_read_part_info(struct flash_bank *bank)
        stellaris_info->iosc_desc = " (±30%)";
        stellaris_info->xtal_mask = 0x0f;
 
-       switch ((did0 >> 28) & 0x7) {
-       case 0:                         /* Sandstorm */
-               /*
-                * Current (2009-August) parts seem to be rev C2 and use 12 MHz.
-                * Parts before rev C0 used 15 MHz; some C0 parts use 15 MHz
-                * (LM3S618), but some other C0 parts are 12 MHz (LM3S811).
-                */
-               if (((did0 >> 8) & 0xff) < 2) {
-                       stellaris_info->iosc_freq = 15000000;
-                       stellaris_info->iosc_desc = " (±50%)";
-               }
-               break;
-       case 1:
-               switch ((did0 >> 16) & 0xff) {
+       /* get device class */
+       if (DID0_VER(did0) > 0) {
+               stellaris_info->target_class = (did0 >> 16) & 0xFF;
+       } else {
+               /* Sandstorm class */
+               stellaris_info->target_class = 0;
+       }
+
+       switch (stellaris_info->target_class) {
+               case 0:                         /* Sandstorm */
+                       /*
+                        * Current (2009-August) parts seem to be rev C2 and use 12 MHz.
+                        * Parts before rev C0 used 15 MHz; some C0 parts use 15 MHz
+                        * (LM3S618), but some other C0 parts are 12 MHz (LM3S811).
+                        */
+                       if (((did0 >> 8) & 0xff) < 2) {
+                               stellaris_info->iosc_freq = 15000000;
+                               stellaris_info->iosc_desc = " (±50%)";
+                       }
+                       break;
+
                case 1:                 /* Fury */
                        break;
+
                case 4:                 /* Tempest */
                case 5:                 /* Blizzard */
                case 6:                 /* Firestorm */
                        stellaris_info->iosc_freq = 16000000;   /* +/- 1% */
                        stellaris_info->iosc_desc = " (±1%)";
                        /* FALL THROUGH */
+
                case 3:                 /* DustDevil */
                        stellaris_info->xtal_mask = 0x1f;
                        break;
+
                default:
                        LOG_WARNING("Unknown did0 class");
-               }
-               break;
-       default:
-               LOG_WARNING("Unknown did0 version");
-               break;
        }
 
-       for (i = 0; StellarisParts[i].partno; i++)
-       {
+       for (i = 0; StellarisParts[i].partno; i++) {
                if ((StellarisParts[i].partno == ((did1 >> 16) & 0xFF)) &&
-                               (StellarisParts[i].class == ((did0 >> 16) & 0xFF)))
+                               (StellarisParts[i].class == stellaris_info->target_class))
                        break;
        }