From: Jens Kuske <jensku...@gmail.com>
Instead of setting the delay for whole bytes allow setting
it for each individual bit. Also add support for
address/command lane delays.
Signed-off-by: Jens Kuske <jensku...@gmail.com>
Signed-off-by: Andre Przywara <andre.przyw...@arm.com>
---
arch/arm/mach-sunxi/dram_sun8i_h3.c | 54 ++++++++++++++++++-------------------
1 file changed, 27 insertions(+), 27 deletions(-)
diff --git a/arch/arm/mach-sunxi/dram_sun8i_h3.c
b/arch/arm/mach-sunxi/dram_sun8i_h3.c
index 3dd6803..1647d76 100644
--- a/arch/arm/mach-sunxi/dram_sun8i_h3.c
+++ b/arch/arm/mach-sunxi/dram_sun8i_h3.c
@@ -16,12 +16,13 @@
#include <linux/kconfig.h>
struct dram_para {
- u32 read_delays;
- u32 write_delays;
u16 page_size;
u8 bus_width;
u8 dual_rank;
u8 row_bits;
+ const u8 dx_read_delays[4][11];
+ const u8 dx_write_delays[4][11];
+ const u8 ac_delays[31];
};
static inline int ns_to_t(int nanoseconds)
@@ -64,34 +65,25 @@ static void mctl_phy_init(u32 val)
mctl_await_completion(&mctl_ctl->pgsr[0], PGSR_INIT_DONE, 0x1);
}
-static void mctl_dq_delay(u32 read, u32 write)
+static void mctl_set_bit_delays(struct dram_para *para)
{
struct sunxi_mctl_ctl_reg * const mctl_ctl =
(struct sunxi_mctl_ctl_reg *)SUNXI_DRAM_CTL0_BASE;
int i, j;
- u32 val;
-
- for (i = 0; i < 4; i++) {
- val = DXBDLR_WRITE_DELAY((write >> (i * 4)) & 0xf) |
- DXBDLR_READ_DELAY(((read >> (i * 4)) & 0xf) * 2);
-
- for (j = DXBDLR_DQ(0); j <= DXBDLR_DM; j++)
- writel(val, &mctl_ctl->dx[i].bdlr[j]);
- }
clrbits_le32(&mctl_ctl->pgcr[0], 1 << 26);
- for (i = 0; i < 4; i++) {
- val = DXBDLR_WRITE_DELAY((write >> (16 + i * 4)) & 0xf) |
- DXBDLR_READ_DELAY((read >> (16 + i * 4)) & 0xf);
+ for (i = 0; i < 4; i++)
+ for (j = 0; j < 11; j++)
+ writel(DXBDLR_WRITE_DELAY(para->dx_write_delays[i][j]) |
+ DXBDLR_READ_DELAY(para->dx_read_delays[i][j]),
+ &mctl_ctl->dx[i].bdlr[j]);
- writel(val, &mctl_ctl->dx[i].bdlr[DXBDLR_DQS]);
- writel(val, &mctl_ctl->dx[i].bdlr[DXBDLR_DQSN]);
- }
+ for (i = 0; i < 31; i++)
+ writel(ACBDLR_WRITE_DELAY(para->ac_delays[i]),
+ &mctl_ctl->acbdlr[i]);
setbits_le32(&mctl_ctl->pgcr[0], 1 << 26);
-
- udelay(1);
}
static void mctl_set_master_priority(void)
@@ -372,11 +364,8 @@ static int mctl_channel_init(struct dram_para *para)
clrsetbits_le32(&mctl_ctl->dtcr, 0xf << 24,
(para->dual_rank ? 0x3 : 0x1) << 24);
-
- if (para->read_delays || para->write_delays) {
- mctl_dq_delay(para->read_delays, para->write_delays);
- udelay(50);
- }
+ mctl_set_bit_delays(para);
+ udelay(50);
mctl_zq_calibration(para);
@@ -458,12 +447,23 @@ unsigned long sunxi_dram_init(void)
(struct sunxi_mctl_ctl_reg *)SUNXI_DRAM_CTL0_BASE;
struct dram_para para = {
- .read_delays = 0x00007979, /* dram_tpr12 */
- .write_delays = 0x6aaa0000, /* dram_tpr11 */
.dual_rank = 0,
.bus_width = 32,
.row_bits = 15,
.page_size = 4096,
+
+ .dx_read_delays = {{ 18, 18, 18, 18, 18, 18, 18, 18, 18, 0,
0 },
+ { 14, 14, 14, 14, 14, 14, 14, 14, 14, 0,
0 },
+ { 18, 18, 18, 18, 18, 18, 18, 18, 18, 0,
0 },
+ { 14, 14, 14, 14, 14, 14, 14, 14, 14, 0,
0 }},
+ .dx_write_delays = {{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 10,
10 },
+ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 10,
10 },
+ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 10,
10 },
+ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 6,
6 }},
+ .ac_delays = { 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0 },
};
mctl_sys_init(¶);
--
2.8.2
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