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ram: rk3399: update calculate_stride

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Update the calculation of the stride to support all the DRAM case.

Signed-off-by: YouMin Chen <cym@rock-chips.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
This commit is contained in:
Kever Yang 2019-11-15 11:04:52 +08:00
parent da53f0641b
commit c8863b8508
2 changed files with 130 additions and 41 deletions
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9
arch/arm/include/asm/arch-rockchip/sdram_rk3399.h
View File

@ -85,4 +85,13 @@ struct rk3399_sdram_params {
#define PI_WDQ_LEVELING BIT(4)
#define PI_FULL_TRAINING 0xff
enum {
STRIDE_128B = 0,
STRIDE_256B = 1,
STRIDE_512B = 2,
STRIDE_4KB = 3,
UN_STRIDE = 4,
PART_STRIDE = 5,
};
#endif

162
drivers/ram/rockchip/sdram_rk3399.c
View File

@ -2758,15 +2758,20 @@ error:
static unsigned char calculate_stride(struct rk3399_sdram_params *params)
{
unsigned int stride = params->base.stride;
unsigned int channel, chinfo = 0;
unsigned int gstride_type;
unsigned int channel;
unsigned int chinfo = 0;
unsigned int cap = 0;
unsigned int stride = -1;
unsigned int ch_cap[2] = {0, 0};
u64 cap;
gstride_type = STRIDE_256B;
for (channel = 0; channel < 2; channel++) {
unsigned int cs0_cap = 0;
unsigned int cs1_cap = 0;
struct sdram_cap_info *cap_info = &params->ch[channel].cap_info;
struct sdram_cap_info *cap_info =
&params->ch[channel].cap_info;
if (cap_info->col == 0)
continue;
@ -2784,49 +2789,124 @@ static unsigned char calculate_stride(struct rk3399_sdram_params *params)
chinfo |= 1 << channel;
}
/* stride calculation for 1 channel */
if (params->base.num_channels == 1 && chinfo & 1)
return 0x17; /* channel a */
/* stride calculation for 2 channels, default gstride type is 256B */
if (ch_cap[0] == ch_cap[1]) {
cap = ch_cap[0] + ch_cap[1];
switch (cap) {
/* 512MB */
case 512:
stride = 0;
break;
/* 1GB */
case 1024:
stride = 0x5;
break;
/*
* 768MB + 768MB same as total 2GB memory
* useful space: 0-768MB 1GB-1792MB
*/
case 1536:
/* 2GB */
case 2048:
stride = 0x9;
break;
/* 1536MB + 1536MB */
case 3072:
stride = 0x11;
break;
/* 4GB */
case 4096:
stride = 0xD;
break;
default:
printf("%s: Unable to calculate stride for ", __func__);
print_size((cap * (1 << 20)), " capacity\n");
break;
cap = ch_cap[0] + ch_cap[1];
if (params->base.num_channels == 1) {
if (chinfo & 1) /* channel a only */
stride = 0x17;
else /* channel b only */
stride = 0x18;
} else {/* 2 channel */
if (ch_cap[0] == ch_cap[1]) {
/* interleaved */
if (gstride_type == PART_STRIDE) {
/*
* first 64MB no interleaved other 256B interleaved
* if 786M+768M.useful space from 0-1280MB and
* 1536MB-1792MB
* if 1.5G+1.5G(continuous).useful space from 0-2560MB
* and 3072MB-3584MB
*/
stride = 0x1F;
} else {
switch (cap) {
/* 512MB */
case 512:
stride = 0;
break;
/* 1GB unstride or 256B stride*/
case 1024:
stride = (gstride_type == UN_STRIDE) ?
0x1 : 0x5;
break;
/*
* 768MB + 768MB same as total 2GB memory
* useful space: 0-768MB 1GB-1792MB
*/
case 1536:
/* 2GB unstride or 256B or 512B stride */
case 2048:
stride = (gstride_type == UN_STRIDE) ?
0x2 :
((gstride_type == STRIDE_512B) ?
0xA : 0x9);
break;
/* 1536MB + 1536MB */
case 3072:
stride = (gstride_type == UN_STRIDE) ?
0x3 :
((gstride_type == STRIDE_512B) ?
0x12 : 0x11);
break;
/* 4GB unstride or 128B,256B,512B,4KB stride */
case 4096:
stride = (gstride_type == UN_STRIDE) ?
0x3 : (0xC + gstride_type);
break;
}
}
}
if (ch_cap[0] == 2048 && ch_cap[1] == 1024) {
/* 2GB + 1GB */
stride = (gstride_type == UN_STRIDE) ? 0x3 : 0x19;
}
/*
* remain two channel capability not equal OR capability
* power function of 2
*/
if (stride == (-1)) {
switch ((ch_cap[0] > ch_cap[1]) ?
ch_cap[0] : ch_cap[1]) {
case 256: /* 256MB + 128MB */
stride = 0;
break;
case 512: /* 512MB + 256MB */
stride = 1;
break;
case 1024:/* 1GB + 128MB/256MB/384MB/512MB/768MB */
stride = 2;
break;
case 2048: /* 2GB + 128MB/256MB/384MB/512MB/768MB/1GB */
stride = 3;
break;
default:
break;
}
}
if (stride == (-1))
goto error;
}
switch (stride) {
case 0xc:
printf("128B stride\n");
break;
case 5:
case 9:
case 0xd:
case 0x11:
case 0x19:
printf("256B stride\n");
break;
case 0xa:
case 0xe:
case 0x12:
printf("512B stride\n");
break;
case 0xf:
printf("4K stride\n");
break;
case 0x1f:
printf("32MB + 256B stride\n");
break;
default:
printf("no stride\n");
}
sdram_print_stride(stride);
return stride;
error:
printf("Cap not support!\n");
return (-1);
}
static void clear_channel_params(struct rk3399_sdram_params *params, u8 channel)