diff options
Diffstat (limited to 'src/soc/nvidia/tegra132/ccplex.c')
| -rw-r--r-- | src/soc/nvidia/tegra132/ccplex.c | 48 |
1 files changed, 47 insertions, 1 deletions
diff --git a/src/soc/nvidia/tegra132/ccplex.c b/src/soc/nvidia/tegra132/ccplex.c index b569bd2124..b774630797 100644 --- a/src/soc/nvidia/tegra132/ccplex.c +++ b/src/soc/nvidia/tegra132/ccplex.c @@ -21,12 +21,58 @@ #include <console/console.h> #include <arch/io.h> #include <cbfs.h> +#include <timer.h> #include <soc/addressmap.h> +#include "clk_rst.h" #include "ccplex.h" #include "mc.h" +#include "pmc.h" +#define CLK_RST_REGS (void *)(uintptr_t)(TEGRA_CLK_RST_BASE) +#define PMC_REGS (void *)(uintptr_t)(TEGRA_PMC_BASE) #define MTS_FILE_NAME "mts" +static int ccplex_start(void) +{ + struct mono_time t1, t2; + const long timeout_us = 1500000; + long wait_time; + const uint32_t handshake_mask = 1; + const uint32_t cxreset1_mask = 1 << 21; + uint32_t reg; + struct tegra_pmc_regs * const pmc = PMC_REGS; + struct clk_rst_ctlr * const clk_rst = CLK_RST_REGS; + + /* Set the handshake bit to be knocked down. */ + write32(handshake_mask, &pmc->scratch118); + + /* Assert nCXRSET[1] */ + reg = read32(&clk_rst->rst_cpu_cmplx_set); + reg |= cxreset1_mask; + write32(reg, &clk_rst->rst_cpu_cmplx_set); + + timer_monotonic_get(&t1); + while (1) { + reg = read32(&pmc->scratch118); + timer_monotonic_get(&t2); + + wait_time = mono_time_diff_microseconds(&t1, &t2); + + /* Wait for the bit to be knocked down. */ + if ((reg & handshake_mask) != handshake_mask) + break; + + if (wait_time >= timeout_us) { + printk(BIOS_DEBUG, "MTS handshake timeout.\n"); + return -1; + } + } + + printk(BIOS_DEBUG, "MTS handshake took %ld us.\n", wait_time); + + return 0; +} + int ccplex_load_mts(void) { struct cbfs_file file; @@ -57,5 +103,5 @@ int ccplex_load_mts(void) printk(BIOS_DEBUG, "MTS: %zu bytes loaded @ %p\n", nread, mts); - return 0; + return ccplex_start(); } |