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authorMike Frysinger <vapier@gentoo.org>2008-06-01 01:29:57 -0400
committerMike Frysinger <vapier@gentoo.org>2009-02-05 21:25:28 -0500
commit09dc6b0bbd1d5e39cdddeebc059f9a75630e4f6f (patch)
tree9d078c22b9544f27287d78bf4b1734b71a3b47ca
parent47832cd15ae02fb6fde8ebed5b272f85775f2ceb (diff)
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Blackfin: use on-chip syscontrol() rom function when available
Newer Blackfin's have an on-chip rom with a syscontrol() function that needs to be used to properly program the memory and voltage settings as it will include (possibly critical) factory tested bias values. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
-rw-r--r--cpu/blackfin/initcode.c60
1 files changed, 38 insertions, 22 deletions
diff --git a/cpu/blackfin/initcode.c b/cpu/blackfin/initcode.c
index 6091f8c..7facdc3 100644
--- a/cpu/blackfin/initcode.c
+++ b/cpu/blackfin/initcode.c
@@ -216,7 +216,7 @@ static inline void serial_putc(char c)
# define CONFIG_VR_CTL_VAL (CONFIG_VR_CTL_CLKBUF | CONFIG_VR_CTL_VLEV | CONFIG_VR_CTL_FREQ)
#endif
-__attribute__((saveall))
+BOOTROM_CALLED_FUNC_ATTR
void initcode(ADI_BOOT_DATA *bootstruct)
{
uint32_t old_baud = serial_init();
@@ -267,34 +267,50 @@ void initcode(ADI_BOOT_DATA *bootstruct)
bfin_write_SIC_IWR(1);
#endif
- serial_putc('L');
+ /* With newer bootroms, we use the helper function to set up
+ * the memory controller. Older bootroms lacks such helpers
+ * so we do it ourselves.
+ */
+ if (BOOTROM_CAPS_SYSCONTROL) {
+ serial_putc('S');
- bfin_write_PLL_LOCKCNT(CONFIG_PLL_LOCKCNT_VAL);
+ ADI_SYSCTRL_VALUES memory_settings;
+ memory_settings.uwVrCtl = CONFIG_VR_CTL_VAL;
+ memory_settings.uwPllCtl = CONFIG_PLL_CTL_VAL;
+ memory_settings.uwPllDiv = CONFIG_PLL_DIV_VAL;
+ memory_settings.uwPllLockCnt = CONFIG_PLL_LOCKCNT_VAL;
+ syscontrol(SYSCTRL_WRITE | SYSCTRL_VRCTL | SYSCTRL_PLLCTL | SYSCTRL_PLLDIV | SYSCTRL_LOCKCNT |
+ (CONFIG_VR_CTL_VAL & FREQ_MASK ? SYSCTRL_INTVOLTAGE : SYSCTRL_EXTVOLTAGE), &memory_settings, NULL);
+ } else {
+ serial_putc('L');
- serial_putc('A');
+ bfin_write_PLL_LOCKCNT(CONFIG_PLL_LOCKCNT_VAL);
- /* Only reprogram when needed to avoid triggering unnecessary
- * PLL relock sequences.
- */
- if (bfin_read_VR_CTL() != CONFIG_VR_CTL_VAL) {
- serial_putc('!');
- bfin_write_VR_CTL(CONFIG_VR_CTL_VAL);
- asm("idle;");
- }
+ serial_putc('A');
- serial_putc('C');
+ /* Only reprogram when needed to avoid triggering unnecessary
+ * PLL relock sequences.
+ */
+ if (bfin_read_VR_CTL() != CONFIG_VR_CTL_VAL) {
+ serial_putc('!');
+ bfin_write_VR_CTL(CONFIG_VR_CTL_VAL);
+ asm("idle;");
+ }
- bfin_write_PLL_DIV(CONFIG_PLL_DIV_VAL);
+ serial_putc('C');
- serial_putc('K');
+ bfin_write_PLL_DIV(CONFIG_PLL_DIV_VAL);
- /* Only reprogram when needed to avoid triggering unnecessary
- * PLL relock sequences.
- */
- if (bfin_read_PLL_CTL() != CONFIG_PLL_CTL_VAL) {
- serial_putc('!');
- bfin_write_PLL_CTL(CONFIG_PLL_CTL_VAL);
- asm("idle;");
+ serial_putc('K');
+
+ /* Only reprogram when needed to avoid triggering unnecessary
+ * PLL relock sequences.
+ */
+ if (bfin_read_PLL_CTL() != CONFIG_PLL_CTL_VAL) {
+ serial_putc('!');
+ bfin_write_PLL_CTL(CONFIG_PLL_CTL_VAL);
+ asm("idle;");
+ }
}
/* Since we've changed the SCLK above, we may need to update