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sunxi: add sun7i dram setup support

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This patch adds DRAM initialisation support for the Allwinner A20 (sun7i)
processor. This code will not been compiled until the build is hooked up in a
later patch. It has been split out to keep the patches manageable.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net>
Signed-off-by: Jens Kuske <jenskuske@gmail.com>
Signed-off-by: Luke Leighton <lkcl@lkcl.net>
Signed-off-by: Oliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Reviewed-by: Marek Vasut <marex@denx.de>
Cc: Tom Cubie <Mr.hipboi@gmail.com>
Reviewed-by: Tom Rini <trini@ti.com>
master
Ian Campbell 11 years ago committed by Albert ARIBAUD
parent fe1b4db05e
commit 286c3c3a5e
3 changed files with 773 additions and 0 deletions
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  1. 1
      arch/arm/cpu/armv7/sunxi/Makefile
  2. 593
      arch/arm/cpu/armv7/sunxi/dram.c
  3. 179
      arch/arm/include/asm/arch-sunxi/dram.h

1
arch/arm/cpu/armv7/sunxi/Makefile
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@ -11,3 +11,4 @@ obj-y += timer.o
obj-y += clock.o
obj-y += pinmux.o
obj-$(CONFIG_SUN7I) += clock_sun4i.o
obj-$(CONFIG_SUN7I) += dram.o

593
arch/arm/cpu/armv7/sunxi/dram.c
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@ -0,0 +1,593 @@
/*
* sunxi DRAM controller initialization
* (C) Copyright 2012 Henrik Nordstrom <henrik@henriknordstrom.net>
* (C) Copyright 2013 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
*
* Based on sun4i Linux kernel sources mach-sunxi/pm/standby/dram*.c
* and earlier U-Boot Allwiner A10 SPL work
*
* (C) Copyright 2007-2012
* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
* Berg Xing <bergxing@allwinnertech.com>
* Tom Cubie <tangliang@allwinnertech.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* Unfortunately the only documentation we have on the sun7i DRAM
* controller is Allwinner boot0 + boot1 code, and that code uses
* magic numbers & shifts with no explanations. Hence this code is
* rather undocumented and full of magic.
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/dram.h>
#include <asm/arch/timer.h>
#include <asm/arch/sys_proto.h>
#define CPU_CFG_CHIP_VER(n) ((n) << 6)
#define CPU_CFG_CHIP_VER_MASK CPU_CFG_CHIP_VER(0x3)
#define CPU_CFG_CHIP_REV_A 0x0
#define CPU_CFG_CHIP_REV_C1 0x1
#define CPU_CFG_CHIP_REV_C2 0x2
#define CPU_CFG_CHIP_REV_B 0x3
/*
* Wait up to 1s for mask to be clear in given reg.
*/
static void await_completion(u32 *reg, u32 mask)
{
unsigned long tmo = timer_get_us() + 1000000;
while (readl(reg) & mask) {
if (timer_get_us() > tmo)
panic("Timeout initialising DRAM\n");
}
}
static void mctl_ddr3_reset(void)
{
struct sunxi_dram_reg *dram =
(struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
clrbits_le32(&dram->mcr, DRAM_MCR_RESET);
udelay(2);
setbits_le32(&dram->mcr, DRAM_MCR_RESET);
}
static void mctl_set_drive(void)
{
struct sunxi_dram_reg *dram = (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
clrsetbits_le32(&dram->mcr, DRAM_MCR_MODE_NORM(0x3) | (0x3 << 28),
DRAM_MCR_MODE_EN(0x3) |
0xffc);
}
static void mctl_itm_disable(void)
{
struct sunxi_dram_reg *dram = (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
clrsetbits_le32(&dram->ccr, DRAM_CCR_INIT, DRAM_CCR_ITM_OFF);
}
static void mctl_itm_enable(void)
{
struct sunxi_dram_reg *dram = (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
clrbits_le32(&dram->ccr, DRAM_CCR_ITM_OFF);
}
static void mctl_enable_dll0(u32 phase)
{
struct sunxi_dram_reg *dram = (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
clrsetbits_le32(&dram->dllcr[0], 0x3f << 6,
((phase >> 16) & 0x3f) << 6);
clrsetbits_le32(&dram->dllcr[0], DRAM_DLLCR_NRESET, DRAM_DLLCR_DISABLE);
udelay(2);
clrbits_le32(&dram->dllcr[0], DRAM_DLLCR_NRESET | DRAM_DLLCR_DISABLE);
udelay(22);
clrsetbits_le32(&dram->dllcr[0], DRAM_DLLCR_DISABLE, DRAM_DLLCR_NRESET);
udelay(22);
}
/*
* Note: This differs from pm/standby in that it checks the bus width
*/
static void mctl_enable_dllx(u32 phase)
{
struct sunxi_dram_reg *dram = (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
u32 i, n, bus_width;
bus_width = readl(&dram->dcr);
if ((bus_width & DRAM_DCR_BUS_WIDTH_MASK) ==
DRAM_DCR_BUS_WIDTH(DRAM_DCR_BUS_WIDTH_32BIT))
n = DRAM_DCR_NR_DLLCR_32BIT;
else
n = DRAM_DCR_NR_DLLCR_16BIT;
for (i = 1; i < n; i++) {
clrsetbits_le32(&dram->dllcr[i], 0xf << 14,
(phase & 0xf) << 14);
clrsetbits_le32(&dram->dllcr[i], DRAM_DLLCR_NRESET,
DRAM_DLLCR_DISABLE);
phase >>= 4;
}
udelay(2);
for (i = 1; i < n; i++)
clrbits_le32(&dram->dllcr[i], DRAM_DLLCR_NRESET |
DRAM_DLLCR_DISABLE);
udelay(22);
for (i = 1; i < n; i++)
clrsetbits_le32(&dram->dllcr[i], DRAM_DLLCR_DISABLE,
DRAM_DLLCR_NRESET);
udelay(22);
}
static u32 hpcr_value[32] = {
#ifdef CONFIG_SUN7I
0x0301, 0x0301, 0x0301, 0x0301,
0x0301, 0x0301, 0x0301, 0x0301,
0, 0, 0, 0,
0, 0, 0, 0,
0x1031, 0x1031, 0x0735, 0x1035,
0x1035, 0x0731, 0x1031, 0x0735,
0x1035, 0x1031, 0x0731, 0x1035,
0x0001, 0x1031, 0, 0x1031
/* last row differs from boot0 source table
* 0x1031, 0x0301, 0x0301, 0x0731
* but boot0 code skips #28 and #30, and sets #29 and #31 to the
* value from #28 entry (0x1031)
*/
#endif
};
static void mctl_configure_hostport(void)
{
struct sunxi_dram_reg *dram = (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
u32 i;
for (i = 0; i < 32; i++)
writel(hpcr_value[i], &dram->hpcr[i]);
}
static void mctl_setup_dram_clock(u32 clk)
{
u32 reg_val;
struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
/* setup DRAM PLL */
reg_val = readl(&ccm->pll5_cfg);
reg_val &= ~CCM_PLL5_CTRL_M_MASK; /* set M to 0 (x1) */
reg_val &= ~CCM_PLL5_CTRL_K_MASK; /* set K to 0 (x1) */
reg_val &= ~CCM_PLL5_CTRL_N_MASK; /* set N to 0 (x0) */
reg_val &= ~CCM_PLL5_CTRL_P_MASK; /* set P to 0 (x1) */
if (clk >= 540 && clk < 552) {
/* dram = 540MHz, pll5p = 540MHz */
reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3));
reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(15));
reg_val |= CCM_PLL5_CTRL_P(1);
} else if (clk >= 512 && clk < 528) {
/* dram = 512MHz, pll5p = 384MHz */
reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(3));
reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(4));
reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(16));
reg_val |= CCM_PLL5_CTRL_P(2);
} else if (clk >= 496 && clk < 504) {
/* dram = 496MHz, pll5p = 372MHz */
reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(3));
reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(2));
reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(31));
reg_val |= CCM_PLL5_CTRL_P(2);
} else if (clk >= 468 && clk < 480) {
/* dram = 468MHz, pll5p = 468MHz */
reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3));
reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(13));
reg_val |= CCM_PLL5_CTRL_P(1);
} else if (clk >= 396 && clk < 408) {
/* dram = 396MHz, pll5p = 396MHz */
reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3));
reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(11));
reg_val |= CCM_PLL5_CTRL_P(1);
} else {
/* any other frequency that is a multiple of 24 */
reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(2));
reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(clk / 24));
reg_val |= CCM_PLL5_CTRL_P(CCM_PLL5_CTRL_P_X(2));
}
reg_val &= ~CCM_PLL5_CTRL_VCO_GAIN; /* PLL VCO Gain off */
reg_val |= CCM_PLL5_CTRL_EN; /* PLL On */
writel(reg_val, &ccm->pll5_cfg);
udelay(5500);
setbits_le32(&ccm->pll5_cfg, CCM_PLL5_CTRL_DDR_CLK);
#if defined(CONFIG_SUN4I) || defined(CONFIG_SUN7I)
/* reset GPS */
clrbits_le32(&ccm->gps_clk_cfg, CCM_GPS_CTRL_RESET | CCM_GPS_CTRL_GATE);
setbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_GPS);
udelay(1);
clrbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_GPS);
#endif
/* setup MBUS clock */
reg_val = CCM_MBUS_CTRL_GATE |
CCM_MBUS_CTRL_CLK_SRC(CCM_MBUS_CTRL_CLK_SRC_PLL6) |
CCM_MBUS_CTRL_N(CCM_MBUS_CTRL_N_X(2)) |
CCM_MBUS_CTRL_M(CCM_MBUS_CTRL_M_X(2));
writel(reg_val, &ccm->mbus_clk_cfg);
/*
* open DRAMC AHB & DLL register clock
* close it first
*/
clrbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_SDRAM | CCM_AHB_GATE_DLL);
udelay(22);
/* then open it */
setbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_SDRAM | CCM_AHB_GATE_DLL);
udelay(22);
}
static int dramc_scan_readpipe(void)
{
struct sunxi_dram_reg *dram = (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
u32 reg_val;
/* data training trigger */
#ifdef CONFIG_SUN7I
clrbits_le32(&dram->csr, DRAM_CSR_FAILED);
#endif
setbits_le32(&dram->ccr, DRAM_CCR_DATA_TRAINING);
/* check whether data training process has completed */
await_completion(&dram->ccr, DRAM_CCR_DATA_TRAINING);
/* check data training result */
reg_val = readl(&dram->csr);
if (reg_val & DRAM_CSR_FAILED)
return -1;
return 0;
}
static int dramc_scan_dll_para(void)
{
struct sunxi_dram_reg *dram = (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
const u32 dqs_dly[7] = {0x3, 0x2, 0x1, 0x0, 0xe, 0xd, 0xc};
const u32 clk_dly[15] = {0x07, 0x06, 0x05, 0x04, 0x03,
0x02, 0x01, 0x00, 0x08, 0x10,
0x18, 0x20, 0x28, 0x30, 0x38};
u32 clk_dqs_count[15];
u32 dqs_i, clk_i, cr_i;
u32 max_val, min_val;
u32 dqs_index, clk_index;
/* Find DQS_DLY Pass Count for every CLK_DLY */
for (clk_i = 0; clk_i < 15; clk_i++) {
clk_dqs_count[clk_i] = 0;
clrsetbits_le32(&dram->dllcr[0], 0x3f << 6,
(clk_dly[clk_i] & 0x3f) << 6);
for (dqs_i = 0; dqs_i < 7; dqs_i++) {
for (cr_i = 1; cr_i < 5; cr_i++) {
clrsetbits_le32(&dram->dllcr[cr_i],
0x4f << 14,
(dqs_dly[dqs_i] & 0x4f) << 14);
}
udelay(2);
if (dramc_scan_readpipe() == 0)
clk_dqs_count[clk_i]++;
}
}
/* Test DQS_DLY Pass Count for every CLK_DLY from up to down */
for (dqs_i = 15; dqs_i > 0; dqs_i--) {
max_val = 15;
min_val = 15;
for (clk_i = 0; clk_i < 15; clk_i++) {
if (clk_dqs_count[clk_i] == dqs_i) {
max_val = clk_i;
if (min_val == 15)
min_val = clk_i;
}
}
if (max_val < 15)
break;
}
/* Check if Find a CLK_DLY failed */
if (!dqs_i)
goto fail;
/* Find the middle index of CLK_DLY */
clk_index = (max_val + min_val) >> 1;
if ((max_val == (15 - 1)) && (min_val > 0))
/* if CLK_DLY[MCTL_CLK_DLY_COUNT] is very good, then the middle
* value can be more close to the max_val
*/
clk_index = (15 + clk_index) >> 1;
else if ((max_val < (15 - 1)) && (min_val == 0))
/* if CLK_DLY[0] is very good, then the middle value can be more
* close to the min_val
*/
clk_index >>= 1;
if (clk_dqs_count[clk_index] < dqs_i)
clk_index = min_val;
/* Find the middle index of DQS_DLY for the CLK_DLY got above, and Scan
* read pipe again
*/
clrsetbits_le32(&dram->dllcr[0], 0x3f << 6,
(clk_dly[clk_index] & 0x3f) << 6);
max_val = 7;
min_val = 7;
for (dqs_i = 0; dqs_i < 7; dqs_i++) {
clk_dqs_count[dqs_i] = 0;
for (cr_i = 1; cr_i < 5; cr_i++) {
clrsetbits_le32(&dram->dllcr[cr_i],
0x4f << 14,
(dqs_dly[dqs_i] & 0x4f) << 14);
}
udelay(2);
if (dramc_scan_readpipe() == 0) {
clk_dqs_count[dqs_i] = 1;
max_val = dqs_i;
if (min_val == 7)
min_val = dqs_i;
}
}
if (max_val < 7) {
dqs_index = (max_val + min_val) >> 1;
if ((max_val == (7-1)) && (min_val > 0))
dqs_index = (7 + dqs_index) >> 1;
else if ((max_val < (7-1)) && (min_val == 0))
dqs_index >>= 1;
if (!clk_dqs_count[dqs_index])
dqs_index = min_val;
for (cr_i = 1; cr_i < 5; cr_i++) {
clrsetbits_le32(&dram->dllcr[cr_i],
0x4f << 14,
(dqs_dly[dqs_index] & 0x4f) << 14);
}
udelay(2);
return dramc_scan_readpipe();
}
fail:
clrbits_le32(&dram->dllcr[0], 0x3f << 6);
for (cr_i = 1; cr_i < 5; cr_i++)
clrbits_le32(&dram->dllcr[cr_i], 0x4f << 14);
udelay(2);
return dramc_scan_readpipe();
}
static void dramc_clock_output_en(u32 on)
{
#if defined(CONFIG_SUN5I) || defined(CONFIG_SUN7I)
struct sunxi_dram_reg *dram = (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
if (on)
setbits_le32(&dram->mcr, DRAM_MCR_DCLK_OUT);
else
clrbits_le32(&dram->mcr, DRAM_MCR_DCLK_OUT);
#endif
}
static const u16 tRFC_table[2][6] = {
/* 256Mb 512Mb 1Gb 2Gb 4Gb 8Gb */
/* DDR2 75ns 105ns 127.5ns 195ns 327.5ns invalid */
{ 77, 108, 131, 200, 336, 336 },
/* DDR3 invalid 90ns 110ns 160ns 300ns 350ns */
{ 93, 93, 113, 164, 308, 359 }
};
static void dramc_set_autorefresh_cycle(u32 clk, u32 type, u32 density)
{
struct sunxi_dram_reg *dram = (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
u32 tRFC, tREFI;
tRFC = (tRFC_table[type][density] * clk + 1023) >> 10;
tREFI = (7987 * clk) >> 10; /* <= 7.8us */
writel(DRAM_DRR_TREFI(tREFI) | DRAM_DRR_TRFC(tRFC), &dram->drr);
}
unsigned long dramc_init(struct dram_para *para)
{
struct sunxi_dram_reg *dram = (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
u32 reg_val;
u32 density;
int ret_val;
/* check input dram parameter structure */
if (!para)
return 0;
/* setup DRAM relative clock */
mctl_setup_dram_clock(para->clock);
/* reset external DRAM */
mctl_set_drive();
/* dram clock off */
dramc_clock_output_en(0);
mctl_itm_disable();
mctl_enable_dll0(para->tpr3);
/* configure external DRAM */
reg_val = 0x0;
if (para->type == DRAM_MEMORY_TYPE_DDR3)
reg_val |= DRAM_DCR_TYPE_DDR3;
reg_val |= DRAM_DCR_IO_WIDTH(para->io_width >> 3);
if (para->density == 256)
density = DRAM_DCR_CHIP_DENSITY_256M;
else if (para->density == 512)
density = DRAM_DCR_CHIP_DENSITY_512M;
else if (para->density == 1024)
density = DRAM_DCR_CHIP_DENSITY_1024M;
else if (para->density == 2048)
density = DRAM_DCR_CHIP_DENSITY_2048M;
else if (para->density == 4096)
density = DRAM_DCR_CHIP_DENSITY_4096M;
else if (para->density == 8192)
density = DRAM_DCR_CHIP_DENSITY_8192M;
else
density = DRAM_DCR_CHIP_DENSITY_256M;
reg_val |= DRAM_DCR_CHIP_DENSITY(density);
reg_val |= DRAM_DCR_BUS_WIDTH((para->bus_width >> 3) - 1);
reg_val |= DRAM_DCR_RANK_SEL(para->rank_num - 1);
reg_val |= DRAM_DCR_CMD_RANK_ALL;
reg_val |= DRAM_DCR_MODE(DRAM_DCR_MODE_INTERLEAVE);
writel(reg_val, &dram->dcr);
#ifdef CONFIG_SUN7I
setbits_le32(&dram->zqcr1, (0x1 << 24) | (0x1 << 1));
if (para->tpr4 & 0x2)
clrsetbits_le32(&dram->zqcr1, (0x1 << 24), (0x1 << 1));
dramc_clock_output_en(1);
#endif
#if (defined(CONFIG_SUN5I) || defined(CONFIG_SUN7I))
/* set odt impendance divide ratio */
reg_val = ((para->zq) >> 8) & 0xfffff;
reg_val |= ((para->zq) & 0xff) << 20;
reg_val |= (para->zq) & 0xf0000000;
writel(reg_val, &dram->zqcr0);
#endif
#ifdef CONFIG_SUN7I
/* Set CKE Delay to about 1ms */
setbits_le32(&dram->idcr, 0x1ffff);
#endif
#ifdef CONFIG_SUN7I
if ((readl(&dram->ppwrsctl) & 0x1) != 0x1)
mctl_ddr3_reset();
else
setbits_le32(&dram->mcr, DRAM_MCR_RESET);
#endif
udelay(1);
await_completion(&dram->ccr, DRAM_CCR_INIT);
mctl_enable_dllx(para->tpr3);
/* set refresh period */
dramc_set_autorefresh_cycle(para->clock, para->type - 2, density);
/* set timing parameters */
writel(para->tpr0, &dram->tpr0);
writel(para->tpr1, &dram->tpr1);
writel(para->tpr2, &dram->tpr2);
if (para->type == DRAM_MEMORY_TYPE_DDR3) {
reg_val = DRAM_MR_BURST_LENGTH(0x0);
#if (defined(CONFIG_SUN5I) || defined(CONFIG_SUN7I))
reg_val |= DRAM_MR_POWER_DOWN;
#endif
reg_val |= DRAM_MR_CAS_LAT(para->cas - 4);
reg_val |= DRAM_MR_WRITE_RECOVERY(0x5);
} else if (para->type == DRAM_MEMORY_TYPE_DDR2) {
reg_val = DRAM_MR_BURST_LENGTH(0x2);
reg_val |= DRAM_MR_CAS_LAT(para->cas);
reg_val |= DRAM_MR_WRITE_RECOVERY(0x5);
}
writel(reg_val, &dram->mr);
writel(para->emr1, &dram->emr);
writel(para->emr2, &dram->emr2);
writel(para->emr3, &dram->emr3);
/* set DQS window mode */
clrsetbits_le32(&dram->ccr, DRAM_CCR_DQS_DRIFT_COMP, DRAM_CCR_DQS_GATE);
#ifdef CONFIG_SUN7I
/* Command rate timing mode 2T & 1T */
if (para->tpr4 & 0x1)
setbits_le32(&dram->ccr, DRAM_CCR_COMMAND_RATE_1T);
#endif
/* reset external DRAM */
setbits_le32(&dram->ccr, DRAM_CCR_INIT);
await_completion(&dram->ccr, DRAM_CCR_INIT);
#ifdef CONFIG_SUN7I
/* setup zq calibration manual */
reg_val = readl(&dram->ppwrsctl);
if ((reg_val & 0x1) == 1) {
/* super_standby_flag = 1 */
reg_val = readl(0x01c20c00 + 0x120); /* rtc */
reg_val &= 0x000fffff;
reg_val |= 0x17b00000;
writel(reg_val, &dram->zqcr0);
/* exit self-refresh state */
clrsetbits_le32(&dram->dcr, 0x1f << 27, 0x12 << 27);
/* check whether command has been executed */
await_completion(&dram->dcr, 0x1 << 31);
udelay(2);
/* dram pad hold off */
setbits_le32(&dram->ppwrsctl, 0x16510000);
await_completion(&dram->ppwrsctl, 0x1);
/* exit self-refresh state */
clrsetbits_le32(&dram->dcr, 0x1f << 27, 0x12 << 27);
/* check whether command has been executed */
await_completion(&dram->dcr, 0x1 << 31);
udelay(2);
/* issue a refresh command */
clrsetbits_le32(&dram->dcr, 0x1f << 27, 0x13 << 27);
await_completion(&dram->dcr, 0x1 << 31);
udelay(2);
}
#endif
/* scan read pipe value */
mctl_itm_enable();
if (para->tpr3 & (0x1 << 31)) {
ret_val = dramc_scan_dll_para();
if (ret_val == 0)
para->tpr3 =
(((readl(&dram->dllcr[0]) >> 6) & 0x3f) << 16) |
(((readl(&dram->dllcr[1]) >> 14) & 0xf) << 0) |
(((readl(&dram->dllcr[2]) >> 14) & 0xf) << 4) |
(((readl(&dram->dllcr[3]) >> 14) & 0xf) << 8) |
(((readl(&dram->dllcr[4]) >> 14) & 0xf) << 12
);
} else {
ret_val = dramc_scan_readpipe();
}
if (ret_val < 0)
return 0;
/* configure all host port */
mctl_configure_hostport();
return get_ram_size((long *)PHYS_SDRAM_0, PHYS_SDRAM_0_SIZE);
}

179
arch/arm/include/asm/arch-sunxi/dram.h
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/*
* (C) Copyright 2007-2012
* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
* Berg Xing <bergxing@allwinnertech.com>
* Tom Cubie <tangliang@allwinnertech.com>
*
* Sunxi platform dram register definition.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _SUNXI_DRAM_H
#define _SUNXI_DRAM_H
#include <linux/types.h>
struct sunxi_dram_reg {
u32 ccr; /* 0x00 controller configuration register */
u32 dcr; /* 0x04 dram configuration register */
u32 iocr; /* 0x08 i/o configuration register */
u32 csr; /* 0x0c controller status register */
u32 drr; /* 0x10 dram refresh register */
u32 tpr0; /* 0x14 dram timing parameters register 0 */
u32 tpr1; /* 0x18 dram timing parameters register 1 */
u32 tpr2; /* 0x1c dram timing parameters register 2 */
u32 gdllcr; /* 0x20 global dll control register */
u8 res0[0x28];
u32 rslr0; /* 0x4c rank system latency register */
u32 rslr1; /* 0x50 rank system latency register */
u8 res1[0x8];
u32 rdgr0; /* 0x5c rank dqs gating register */
u32 rdgr1; /* 0x60 rank dqs gating register */
u8 res2[0x34];
u32 odtcr; /* 0x98 odt configuration register */
u32 dtr0; /* 0x9c data training register 0 */
u32 dtr1; /* 0xa0 data training register 1 */
u32 dtar; /* 0xa4 data training address register */
u32 zqcr0; /* 0xa8 zq control register 0 */
u32 zqcr1; /* 0xac zq control register 1 */
u32 zqsr; /* 0xb0 zq status register */
u32 idcr; /* 0xb4 initializaton delay configure reg */
u8 res3[0x138];
u32 mr; /* 0x1f0 mode register */
u32 emr; /* 0x1f4 extended mode register */
u32 emr2; /* 0x1f8 extended mode register */
u32 emr3; /* 0x1fc extended mode register */
u32 dllctr; /* 0x200 dll control register */
u32 dllcr[5]; /* 0x204 dll control register 0(byte 0) */
/* 0x208 dll control register 1(byte 1) */
/* 0x20c dll control register 2(byte 2) */
/* 0x210 dll control register 3(byte 3) */
/* 0x214 dll control register 4(byte 4) */
u32 dqtr0; /* 0x218 dq timing register */
u32 dqtr1; /* 0x21c dq timing register */
u32 dqtr2; /* 0x220 dq timing register */
u32 dqtr3; /* 0x224 dq timing register */
u32 dqstr; /* 0x228 dqs timing register */
u32 dqsbtr; /* 0x22c dqsb timing register */
u32 mcr; /* 0x230 mode configure register */
u8 res[0x8];
u32 ppwrsctl; /* 0x23c pad power save control */
u32 apr; /* 0x240 arbiter period register */
u32 pldtr; /* 0x244 priority level data threshold reg */
u8 res5[0x8];
u32 hpcr[32]; /* 0x250 host port configure register */
u8 res6[0x10];
u32 csel; /* 0x2e0 controller select register */
};
struct dram_para {
u32 clock;
u32 type;
u32 rank_num;
u32 density;
u32 io_width;
u32 bus_width;
u32 cas;
u32 zq;
u32 odt_en;
u32 size;
u32 tpr0;
u32 tpr1;
u32 tpr2;
u32 tpr3;
u32 tpr4;
u32 tpr5;
u32 emr1;
u32 emr2;
u32 emr3;
};
#define DRAM_CCR_COMMAND_RATE_1T (0x1 << 5)
#define DRAM_CCR_DQS_GATE (0x1 << 14)
#define DRAM_CCR_DQS_DRIFT_COMP (0x1 << 17)
#define DRAM_CCR_ITM_OFF (0x1 << 28)
#define DRAM_CCR_DATA_TRAINING (0x1 << 30)
#define DRAM_CCR_INIT (0x1 << 31)
#define DRAM_MEMORY_TYPE_DDR1 1
#define DRAM_MEMORY_TYPE_DDR2 2
#define DRAM_MEMORY_TYPE_DDR3 3
#define DRAM_MEMORY_TYPE_LPDDR2 4
#define DRAM_MEMORY_TYPE_LPDDR 5
#define DRAM_DCR_TYPE (0x1 << 0)
#define DRAM_DCR_TYPE_DDR2 0x0
#define DRAM_DCR_TYPE_DDR3 0x1
#define DRAM_DCR_IO_WIDTH(n) (((n) & 0x3) << 1)
#define DRAM_DCR_IO_WIDTH_MASK DRAM_DCR_IO_WIDTH(0x3)
#define DRAM_DCR_IO_WIDTH_8BIT 0x0
#define DRAM_DCR_IO_WIDTH_16BIT 0x1
#define DRAM_DCR_CHIP_DENSITY(n) (((n) & 0x7) << 3)
#define DRAM_DCR_CHIP_DENSITY_MASK DRAM_DCR_CHIP_DENSITY(0x7)
#define DRAM_DCR_CHIP_DENSITY_256M 0x0
#define DRAM_DCR_CHIP_DENSITY_512M 0x1
#define DRAM_DCR_CHIP_DENSITY_1024M 0x2
#define DRAM_DCR_CHIP_DENSITY_2048M 0x3
#define DRAM_DCR_CHIP_DENSITY_4096M 0x4
#define DRAM_DCR_CHIP_DENSITY_8192M 0x5
#define DRAM_DCR_BUS_WIDTH(n) (((n) & 0x7) << 6)
#define DRAM_DCR_BUS_WIDTH_MASK DRAM_DCR_BUS_WIDTH(0x7)
#define DRAM_DCR_BUS_WIDTH_32BIT 0x3
#define DRAM_DCR_BUS_WIDTH_16BIT 0x1
#define DRAM_DCR_BUS_WIDTH_8BIT 0x0
#define DRAM_DCR_NR_DLLCR_32BIT 5
#define DRAM_DCR_NR_DLLCR_16BIT 3
#define DRAM_DCR_NR_DLLCR_8BIT 2
#define DRAM_DCR_RANK_SEL(n) (((n) & 0x3) << 10)
#define DRAM_DCR_RANK_SEL_MASK DRAM_DCR_CMD_RANK(0x3)
#define DRAM_DCR_CMD_RANK_ALL (0x1 << 12)
#define DRAM_DCR_MODE(n) (((n) & 0x3) << 13)
#define DRAM_DCR_MODE_MASK DRAM_DCR_MODE(0x3)
#define DRAM_DCR_MODE_SEQ 0x0
#define DRAM_DCR_MODE_INTERLEAVE 0x1
#define DRAM_CSR_FAILED (0x1 << 20)
#define DRAM_DRR_TRFC(n) ((n) & 0xff)
#define DRAM_DRR_TREFI(n) (((n) & 0xffff) << 8)
#define DRAM_DRR_BURST(n) ((((n) - 1) & 0xf) << 24)
#define DRAM_MCR_MODE_NORM(n) (((n) & 0x3) << 0)
#define DRAM_MCR_MODE_NORM_MASK DRAM_MCR_MOD_NORM(0x3)
#define DRAM_MCR_MODE_DQ_OUT(n) (((n) & 0x3) << 2)
#define DRAM_MCR_MODE_DQ_OUT_MASK DRAM_MCR_MODE_DQ_OUT(0x3)
#define DRAM_MCR_MODE_ADDR_OUT(n) (((n) & 0x3) << 4)
#define DRAM_MCR_MODE_ADDR_OUT_MASK DRAM_MCR_MODE_ADDR_OUT(0x3)
#define DRAM_MCR_MODE_DQ_IN_OUT(n) (((n) & 0x3) << 6)
#define DRAM_MCR_MODE_DQ_IN_OUT_MASK DRAM_MCR_MODE_DQ_IN_OUT(0x3)
#define DRAM_MCR_MODE_DQ_TURNON_DELAY(n) (((n) & 0x7) << 8)
#define DRAM_MCR_MODE_DQ_TURNON_DELAY_MASK DRAM_MCR_MODE_DQ_TURNON_DELAY(0x7)
#define DRAM_MCR_MODE_ADDR_IN (0x1 << 11)
#define DRAM_MCR_RESET (0x1 << 12)
#define DRAM_MCR_MODE_EN(n) (((n) & 0x3) << 13)
#define DRAM_MCR_MODE_EN_MASK DRAM_MCR_MOD_EN(0x3)
#define DRAM_MCR_DCLK_OUT (0x1 << 16)
#define DRAM_DLLCR_NRESET (0x1 << 30)
#define DRAM_DLLCR_DISABLE (0x1 << 31)
#define DRAM_ZQCR0_IMP_DIV(n) (((n) & 0xff) << 20)
#define DRAM_ZQCR0_IMP_DIV_MASK DRAM_ZQCR0_IMP_DIV(0xff)
#define DRAM_IOCR_ODT_EN(n) ((((n) & 0x3) << 30) | ((n) & 0x3) << 0)
#define DRAM_IOCR_ODT_EN_MASK DRAM_IOCR_ODT_EN(0x3)
#define DRAM_MR_BURST_LENGTH(n) (((n) & 0x7) << 0)
#define DRAM_MR_BURST_LENGTH_MASK DRAM_MR_BURST_LENGTH(0x7)
#define DRAM_MR_CAS_LAT(n) (((n) & 0x7) << 4)
#define DRAM_MR_CAS_LAT_MASK DRAM_MR_CAS_LAT(0x7)
#define DRAM_MR_WRITE_RECOVERY(n) (((n) & 0x7) << 9)
#define DRAM_MR_WRITE_RECOVERY_MASK DRAM_MR_WRITE_RECOVERY(0x7)
#define DRAM_MR_POWER_DOWN (0x1 << 12)
#define DRAM_CSEL_MAGIC 0x16237495
unsigned long sunxi_dram_init(void);
unsigned long dramc_init(struct dram_para *para);
#endif /* _SUNXI_DRAM_H */
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