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nb/intel/x4x: Add DDR3 JEDEC init 

Add DDR3 JEDEC init (Power up and Initialization by setting emrs regs)

This also modifies the send_jedec_cmd function as DDR3 dimms can have
ranks mirrored which needs to be accounted for.

The ddr3_emrs1_config array is placed externally since it is also
needed for write leveling.

Change-Id: I510b8669aaa48ba99fb4dcf1ece716aef26741bb
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/22994
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
This commit is contained in:
Arthur Heymans 2017-12-25 18:30:01 +01:00 committed by Martin Roth
parent 9129f1aae9
commit f1287266ab
4 changed files with 115 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/northbridge/intel/x4x/raminit.c
View File

@ -408,6 +408,9 @@ static int ddr3_save_dimminfo(u8 dimm_idx, u8 *raw_spd,
s->dimms[dimm_idx].spd_crc = spd_ddr3_calc_unique_crc(raw_spd,
raw_spd[0]);
s->dimms[dimm_idx].mirrored = decoded_dimm.flags.pins_mirrored;
return CB_SUCCESS;
}

96
src/northbridge/intel/x4x/raminit_ddr23.c
View File

@ -1347,14 +1347,45 @@ u32 test_address(int channel, int rank)
return channel * 512 * MiB + rank * 128 * MiB;
}
static void dojedec_ddr2(u8 r, u8 ch, u8 cmd, u16 val)
/* DDR3 Rank1 Address mirror
* swap the following pins:
* A3<->A4, A5<->A6, A7<->A8, BA0<->BA1 */
static u32 mirror_shift_bit(const u32 data, u8 bit)
{
u32 temp0 = data, temp1 = data;
temp0 &= 1 << bit;
temp0 <<= 1;
temp1 &= 1 << (bit + 1);
temp1 >>= 1;
return (data & ~(3 << bit)) | temp0 | temp1;
}
static void send_jedec_cmd(const struct sysinfo *s, u8 r,
u8 ch, u8 cmd, u32 val)
{
u32 addr = test_address(ch, r);
volatile u32 rubbish;
u8 data8 = cmd;
u32 data32;
MCHBAR8(0x271) = (MCHBAR8(0x271) & ~0x3e) | cmd;
MCHBAR8(0x671) = (MCHBAR8(0x671) & ~0x3e) | cmd;
rubbish = read32((void *)((val<<3) | addr));
if (s->spd_type == DDR3 && (r & 1)
&& s->dimms[ch * 2 + (r >> 1)].mirrored) {
data8 = (u8)mirror_shift_bit(data8, 4);
}
MCHBAR8(0x271) = (MCHBAR8(0x271) & ~0x3e) | data8;
MCHBAR8(0x671) = (MCHBAR8(0x671) & ~0x3e) | data8;
data32 = val;
if (s->spd_type == DDR3 && (r & 1)
&& s->dimms[ch * 2 + (r >> 1)].mirrored) {
data32 = mirror_shift_bit(data32, 3);
data32 = mirror_shift_bit(data32, 5);
data32 = mirror_shift_bit(data32, 7);
}
data32 <<= 3;
rubbish = read32((void *)((data32 | addr)));
udelay(10);
MCHBAR8(0x271) = (MCHBAR8(0x271) & ~0x3e) | NORMALOP_CMD;
MCHBAR8(0x671) = (MCHBAR8(0x671) & ~0x3e) | NORMALOP_CMD;
@ -1419,7 +1450,7 @@ static void jedec_ddr2(struct sysinfo *s)
default:
break;
}
dojedec_ddr2(r, ch, jedec[i][0], v);
send_jedec_cmd(s, r, ch, jedec[i][0], v);
udelay(1);
printk(RAM_SPEW, "Jedec step %d\n", i);
}
@ -1427,6 +1458,55 @@ static void jedec_ddr2(struct sysinfo *s)
printk(BIOS_DEBUG, "MRS done\n");
}
static void jedec_ddr3(struct sysinfo *s)
{
int ch, r, dimmconfig, cmd, ddr3_freq;
u8 ddr3_emrs2_rtt_wr_config[16][4] = { /* [config][Rank] */
{0, 0, 0, 0}, /* NC_NC */
{0, 0, 0, 0}, /* x8ss_NC */
{0, 0, 0, 0}, /* x8ds_NC */
{0, 0, 0, 0}, /* x16ss_NC */
{0, 0, 0, 0}, /* NC_x8ss */
{2, 0, 2, 0}, /* x8ss_x8ss */
{2, 2, 2, 0}, /* x8ds_x8ss */
{2, 0, 2, 0}, /* x16ss_x8ss */
{0, 0, 0, 0}, /* NC_x8ss */
{2, 0, 2, 2}, /* x8ss_x8ds */
{2, 2, 2, 2}, /* x8ds_x8ds */
{2, 0, 2, 2}, /* x16ss_x8ds */
{0, 0, 0, 0}, /* NC_x16ss */
{2, 0, 2, 0}, /* x8ss_x16ss */
{2, 2, 2, 0}, /* x8ds_x16ss */
{2, 0, 2, 0}, /* x16ss_x16ss */
};
printk(BIOS_DEBUG, "MRS...\n");
ddr3_freq = s->selected_timings.mem_clk - MEM_CLOCK_800MHz;
FOR_EACH_POPULATED_RANK(s->dimms, ch, r) {
printk(BIOS_DEBUG, "CH%d: Found Rank %d\n", ch, r);
send_jedec_cmd(s, r, ch, NOP_CMD, 0);
udelay(200);
dimmconfig = s->dimm_config[ch];
cmd = ddr3_freq << 3; /* actually twl - 5 which is same */
cmd |= ddr3_emrs2_rtt_wr_config[dimmconfig][r] << 9;
send_jedec_cmd(s, r, ch, EMRS2_CMD, cmd);
send_jedec_cmd(s, r, ch, EMRS3_CMD, 0);
cmd = ddr3_emrs1_rtt_nom_config[dimmconfig][r] << 2;
/* Hardcode output drive strength to 34 Ohm / RZQ/7 (why??) */
cmd |= (1 << 1);
send_jedec_cmd(s, r, ch, EMRS1_CMD, cmd);
/* Burst type interleaved, burst length 8, Reset DLL,
* Precharge PD: DLL on */
send_jedec_cmd(s, r, ch, MRS_CMD, (1 << 3) | (1 << 8)
| (1 << 12) | ((s->selected_timings.CAS - 4) << 4)
| ((s->selected_timings.tWR - 4) << 9));
send_jedec_cmd(s, r, ch, ZQCAL_CMD, (1 << 10));
}
printk(BIOS_DEBUG, "MRS done\n");
}
static void sdram_recover_receive_enable(const struct sysinfo *s)
{
u32 reg32;
@ -1949,8 +2029,12 @@ void do_raminit(struct sysinfo *s, int fast_boot)
printk(BIOS_DEBUG, "Done pre-jedec\n");
// JEDEC reset
if (s->boot_path != BOOT_PATH_RESUME)
if (s->boot_path != BOOT_PATH_RESUME) {
if (s->spd_type == DDR2)
jedec_ddr2(s);
else /* DDR3 */
jedec_ddr3(s);
}
printk(BIOS_DEBUG, "Done jedec steps\n");

19
src/northbridge/intel/x4x/raminit_tables.c
View File

@ -269,3 +269,22 @@ const struct dll_setting default_ddr3_1333_dq[2][TOTAL_BYTELANES] = {
{13, 6, 1, 0, 1, 0},
{0, 3, 1, 1, 0, 1}, }
};
const u8 ddr3_emrs1_rtt_nom_config[16][4] = { /* [Config][Rank] */
{0x00, 0x00, 0x00, 0x00}, /* NC_NC */
{0x11, 0x00, 0x00, 0x00}, /* 8S_NC */
{0x11, 0x11, 0x00, 0x00}, /* 8D_NC */
{0x11, 0x00, 0x00, 0x00}, /* 16S_NC */
{0x00, 0x00, 0x11, 0x00}, /* NC_8S */
{0x81, 0x00, 0x81, 0x00}, /* 8S_8S */
{0x81, 0x81, 0x81, 0x00}, /* 8D_8S */
{0x81, 0x00, 0x81, 0x00}, /* 16S_8S */
{0x00, 0x00, 0x11, 0x11}, /* NC_8D */
{0x81, 0x00, 0x81, 0x81}, /* 8S_8D */
{0x81, 0x81, 0x81, 0x81}, /* 8D_8D */
{0x81, 0x00, 0x81, 0x81}, /* 16S_8D */
{0x00, 0x00, 0x11, 0x00}, /* NC_16S */
{0x81, 0x00, 0x81, 0x00}, /* 8S_16S */
{0x81, 0x81, 0x81, 0x00}, /* 8D_16S */
{0x81, 0x00, 0x81, 0x00}, /* 16S_16S */
};

2
src/northbridge/intel/x4x/x4x.h
View File

@ -309,6 +309,7 @@ struct dimminfo {
unsigned int rows;
unsigned int cols;
u16 spd_crc;
u8 mirrored;
};
struct rcven_timings {
@ -388,6 +389,7 @@ extern const struct dll_setting default_ddr2_800_dq[TOTAL_BYTELANES];
extern const struct dll_setting default_ddr3_800_dq[2][TOTAL_BYTELANES];
extern const struct dll_setting default_ddr3_1067_dq[2][TOTAL_BYTELANES];
extern const struct dll_setting default_ddr3_1333_dq[2][TOTAL_BYTELANES];
extern const u8 ddr3_emrs1_rtt_nom_config[16][4];
struct acpi_rsdp;
#ifndef __SIMPLE_DEVICE__