Patrick Georgi (pgeorgi@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9193
-gerrit
commit 18ca0bdb5ea40c509c03ec78f97a08ea5942a95b Author: Ionela Voinescu ionela.voinescu@imgtec.com Date: Mon Jan 19 02:39:18 2015 +0000
pistachio: add timer frequency for SOC; correct platform ID
Corrected platform ID and added timer frequency for SOC. The timer frequency is half the CPU frequency.
BUG=chrome-os-partner:31438 TEST=tested on Pistachio bring up board; behaves as expected. BRANCH=none
Change-Id: If7e03232106b52f2522fc7da586bdaf95f5eefec Signed-off-by: Stefan Reinauer reinauer@chromium.org Original-Commit-Id: d94789950d5300bbe5defbf529480d8d545e743e Original-Change-Id: I1187e4b5280eaf796777d882a2e154e2808e9e37 Original-Signed-off-by: Ionela Voinescu ionela.voinescu@imgtec.com Original-Reviewed-on: https://chromium-review.googlesource.com/241426 Original-Reviewed-by: David Hendricks dhendrix@chromium.org --- src/soc/imgtec/pistachio/include/soc/cpu.h | 12 ++++++++---- src/soc/imgtec/pistachio/monotonic_timer.c | 19 ++++++++++++++++--- 2 files changed, 24 insertions(+), 7 deletions(-)
diff --git a/src/soc/imgtec/pistachio/include/soc/cpu.h b/src/soc/imgtec/pistachio/include/soc/cpu.h index 72775b5..8995219 100644 --- a/src/soc/imgtec/pistachio/include/soc/cpu.h +++ b/src/soc/imgtec/pistachio/include/soc/cpu.h @@ -18,14 +18,18 @@ #ifndef __SOC_IMGTEC_DANUBE_CPU_H__ #define __SOC_IMGTEC_DANUBE_CPU_H__
+#include <arch/io.h> + #define IMG_SPIM0_BASE_ADDRESS 0xB8100F00 #define IMG_SPIM1_BASE_ADDRESS 0xB8101000
/* - * Reading at this address allows to identify the platform the code is running - * on. + * This register holds the FPGA image version + * If we're not working on the FPGA this will be 0 */ -#define IMG_PLATFORM_ID() (*((unsigned *)0xB8149060)) -#define IMG_PLATFORM_ID_SILICON 0xF00D0006 +#define PRIMARY_FPGA_VERSION 0xB8149060 +#define IMG_PLATFORM_ID() read32(PRIMARY_FPGA_VERSION) +#define IMG_PLATFORM_ID_FPGA 0xD1400003 /* Last FPGA image */ +#define IMG_PLATFORM_ID_SILICON 0
#endif diff --git a/src/soc/imgtec/pistachio/monotonic_timer.c b/src/soc/imgtec/pistachio/monotonic_timer.c index 99c147b..c2408b0 100644 --- a/src/soc/imgtec/pistachio/monotonic_timer.c +++ b/src/soc/imgtec/pistachio/monotonic_timer.c @@ -23,6 +23,9 @@ #include <arch/cpu.h> #include <soc/cpu.h>
+#define PISTACHIO_CLOCK_SWITCH 0xB8144200 +#define MIPS_EXTERN_PLL_BYPASS_MASK 0x00000002 + static int get_count_mhz_freq(void) { static unsigned count_mhz_freq; @@ -30,10 +33,20 @@ static int get_count_mhz_freq(void) if (!count_mhz_freq) { if (IMG_PLATFORM_ID() != IMG_PLATFORM_ID_SILICON) count_mhz_freq = 25; /* FPGA board */ - /* - * Will need some means of finding out the counter - * frequency on a real SOC + else { + /* If MIPS PLL external bypass bit is set, it means + * that the MIPS PLL is already set up to work at a + * frequency of 550 MHz; otherwise, the crystal is + * used with a frequency of 52 MHz */ + if (read32(PISTACHIO_CLOCK_SWITCH) & + MIPS_EXTERN_PLL_BYPASS_MASK) + /* Half MIPS PLL freq. */ + count_mhz_freq = 275; + else + /* Half Xtal freq. */ + count_mhz_freq = 26; + } } return count_mhz_freq; }