diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/baytrail/baytrail/iosf.h | 15 | ||||
| -rw-r--r-- | src/soc/intel/baytrail/iosf.c | 15 | ||||
| -rw-r--r-- | src/soc/intel/baytrail/romstage/raminit.c | 45 |
3 files changed, 71 insertions, 4 deletions
diff --git a/src/soc/intel/baytrail/baytrail/iosf.h b/src/soc/intel/baytrail/baytrail/iosf.h index cf7e559e72..497124ebb7 100644 --- a/src/soc/intel/baytrail/baytrail/iosf.h +++ b/src/soc/intel/baytrail/baytrail/iosf.h @@ -58,16 +58,21 @@ uint32_t iosf_bunit_read(int reg); void iosf_bunit_write(int reg, uint32_t val); uint32_t iosf_dunit_read(int reg); void iosf_dunit_write(int reg, uint32_t val); +/* Some registers are per channel while the gloals live in dunit 0 */ +uint32_t iosf_dunit_ch0_read(int reg); +uint32_t iosf_dunit_ch1_read(int reg); uint32_t iosf_punit_read(int reg); void iosf_punit_write(int reg, uint32_t val); /* IOSF ports. */ #define IOSF_PORT_AUNIT 0x00 /* IO Arbiter unit */ #define IOSF_PORT_SYSMEMC 0x01 /* System Memory Controller */ +#define IOSF_PORT_DUNIT_CH0 0x07 /* DUNIT Channel 0 */ #define IOSF_PORT_CPU_BUS 0x02 /* CPU Bus Interface Controller */ #define IOSF_PORT_BUNIT 0x03 /* System Memroy Arbiter/Bunit */ #define IOSF_PORT_PMC 0x04 /* Power Management Controller */ #define IOSF_PORT_GFX 0x06 /* Graphics Adapter */ +#define IOSF_PORT_DUNIT_CH1 0x07 /* DUNIT Channel 1 */ #define IOSF_PORT_SYSMEMIO 0x0c /* System Memory IO */ #define IOSF_PORT_USBPHY 0x43 /* USB PHY */ #define IOSF_PORT_SATAPHY 0xa3 /* SATA PHY */ @@ -120,10 +125,12 @@ void iosf_punit_write(int reg, uint32_t val); */ #define DRP 0x00 -# define DRP_CH0_RANK0_EN (0x01 << 0) -# define DRP_CH0_RANK1_EN (0x01 << 1) -# define DRP_CH1_RANK0_EN (0x01 << 2) -# define DRP_CH1_RANK1_EN (0x01 << 3) +# define DRP_DIMM0_RANK0_EN (0x01 << 0) +# define DRP_DIMM0_RANK1_EN (0x01 << 1) +# define DRP_DIMM1_RANK0_EN (0x01 << 2) +# define DRP_DIMM1_RANK1_EN (0x01 << 3) +# define DRP_RANK_MASK (DRP_DIMM0_RANK0_EN | DRP_DIMM0_RANK1_EN | \ + DRP_DIMM1_RANK0_EN | DRP_DIMM1_RANK1_EN) #define DTR0 0x01 # define DTR0_SPEED_MASK 0x03 # define DTR0_SPEED_800 0x00 diff --git a/src/soc/intel/baytrail/iosf.c b/src/soc/intel/baytrail/iosf.c index 00a3269da0..e35e34f168 100644 --- a/src/soc/intel/baytrail/iosf.c +++ b/src/soc/intel/baytrail/iosf.c @@ -70,6 +70,21 @@ uint32_t iosf_dunit_read(int reg) return read_iosf_reg(MDR_REG); } +uint32_t iosf_dunit_ch0_read(int reg) +{ + return iosf_dunit_read(reg); +} + +uint32_t iosf_dunit_ch1_read(int reg) +{ + uint32_t cr = IOSF_OPCODE(IOSF_OP_READ_SYSMEMC) | + IOSF_PORT(IOSF_PORT_DUNIT_CH1) | IOSF_REG(reg) | + IOSF_BYTE_EN; + + write_iosf_reg(MCR_REG, cr); + return read_iosf_reg(MDR_REG); +} + void iosf_dunit_write(int reg, uint32_t val) { uint32_t cr = IOSF_OPCODE(IOSF_OP_WRITE_SYSMEMC) | diff --git a/src/soc/intel/baytrail/romstage/raminit.c b/src/soc/intel/baytrail/romstage/raminit.c index cf9ccfd1d6..7bcd54fe01 100644 --- a/src/soc/intel/baytrail/romstage/raminit.c +++ b/src/soc/intel/baytrail/romstage/raminit.c @@ -26,6 +26,7 @@ #include <baytrail/gpio.h> #include <baytrail/mrc_cache.h> #include <baytrail/iomap.h> +#include <baytrail/iosf.h> #include <baytrail/pci_devs.h> #include <baytrail/romstage.h> @@ -57,6 +58,48 @@ static void ABI_X86 send_to_console(unsigned char b) console_tx_byte(b); } +static void print_dram_info(void) +{ + const int mrc_ver_reg = 0xf0; + const uint32_t soc_dev = PCI_DEV(0, SOC_DEV, SOC_FUNC); + uint32_t reg; + int num_channels; + int speed; + uint32_t ch0; + uint32_t ch1; + + reg = pci_read_config32(soc_dev, mrc_ver_reg); + + printk(BIOS_INFO, "MRC v%d.%02d\n", (reg >> 8) & 0xff, reg & 0xff); + + /* Number of channels enabled and DDR3 type. Determine number of + * channels by keying of the rank enable bits [3:0]. * */ + ch0 = iosf_dunit_ch0_read(DRP); + ch1 = iosf_dunit_ch1_read(DRP); + num_channels = 0; + if (ch0 & DRP_RANK_MASK) + num_channels++; + if (ch1 & DRP_RANK_MASK) + num_channels++; + + printk(BIOS_INFO, "%d channels of %sDDR3 @ ", num_channels, + (reg & (1 << 22)) ? "LP" : ""); + + /* DRAM frequency -- all channels run at same frequency. */ + reg = iosf_dunit_read(DTR0); + switch (reg & 0x3) { + case 0: + speed = 800; break; + case 1: + speed = 1066; break; + case 2: + speed = 1333; break; + case 3: + speed = 1600; break; + } + printk(BIOS_INFO, "%dMHz\n", speed); +} + void raminit(struct mrc_params *mp, int prev_sleep_state) { int ret; @@ -87,6 +130,8 @@ void raminit(struct mrc_params *mp, int prev_sleep_state) ret = mrc_entry(mp); + print_dram_info(); + cbmem_initialize_empty(); printk(BIOS_DEBUG, "MRC Wrapper returned %d\n", ret); |