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Add support for 'qmod' (quad-modem) board

Browse Source 
You can compile the firmware for this new target using 'make
BOARD=qmod'.

The QMOD differs from simtrace+owhw in terms of low-level
initialization, as it has an external 12MHz clock at XIN, thus bypasses
the main oscillator and needs different PLL configuration.
This commit is contained in:
Harald Welte
2016-08-21 18:32:12 +02:00
parent fd9c041ec8
commit a02b641650
6 changed files with 75 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
firmware/src_board/board_lowlevel.c
View File

@@ -43,15 +43,23 @@
* Local definitions
*----------------------------------------------------------------------------*/
/* Clock settings at 48MHz for 18 MHz crystal */
#if (BOARD_MCK == 48000000)
#ifndef qmod
/* Clock settings at 48MHz for 18 MHz crystal */
#define BOARD_OSCOUNT (CKGR_MOR_MOSCXTST(0x8))
#define BOARD_PLLAR (CKGR_PLLAR_STUCKTO1 \
| CKGR_PLLAR_MULA(0xc) \
| CKGR_PLLAR_PLLACOUNT(0x1) \
| CKGR_PLLAR_DIVA(0x5))
#define BOARD_MCKR (PMC_MCKR_PRES_CLK | PMC_MCKR_CSS_PLLA_CLK)
#else /* qmod */
/* QMod has 12 MHz clock, so multply by 4 and divide by 1 */
#define BOARD_PLLAR (CKGR_PLLAR_STUCKTO1 \
| CKGR_PLLAR_MULA(4-1) \
| CKGR_PLLAR_PLLACOUNT(0x1) \
| CKGR_PLLAR_DIVA(1))
#define BOARD_MCKR (PMC_MCKR_PRES_CLK | PMC_MCKR_CSS_PLLA_CLK)
#endif
/* Clock settings at 64MHz for 18 MHz crystal */
#elif (BOARD_MCK == 64000000)
#define BOARD_OSCOUNT (CKGR_MOR_MOSCXTST(0x8))
@@ -98,6 +106,7 @@ extern WEAK void LowLevelInit( void )
}
*/
#ifndef qmod
/* Initialize main oscillator */
if ( !(PMC->CKGR_MOR & CKGR_MOR_MOSCSEL) )
{
@@ -114,6 +123,13 @@ extern WEAK void LowLevelInit( void )
/* wait for Main XTAL oscillator stabilization */
timeout = 0;
while (!(PMC->PMC_SR & PMC_SR_MOSCSELS) && (timeout++ < CLOCK_TIMEOUT));
#else
/* QMOD has external 12MHz clock source */
PIOB->PIO_PDR = (1 << 9);
PIOB->PIO_PUDR = (1 << 9);
PIOB->PIO_PPDDR = (1 << 9);
PMC->CKGR_MOR = CKGR_MOR_KEY(0x37) | CKGR_MOR_MOSCRCEN | CKGR_MOR_MOSCXTBY| CKGR_MOR_MOSCSEL;
#endif
/* disable the red LED after main clock initialization */
PIOA->PIO_SODR = LED_RED;