[U-Boot] [PATCH 01/11] sunxi: DRAM initialisation for sun9i
Chen-Yu Tsai
wens at csie.org
Sat Oct 29 13:03:30 CEST 2016
On Sat, Oct 29, 2016 at 6:39 PM, Hans de Goede <hdegoede at redhat.com> wrote:
> Hi,
>
> On 28-10-16 20:54, Jagan Teki wrote:
>>
>> On Fri, Oct 28, 2016 at 3:51 PM, Chen-Yu Tsai <wens at csie.org> wrote:
>>>
>>> From: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
>>>
>>> This adds DRAM initialisation code for sun9i, which calculates the
>>> appropriate timings based on timing information for the supplied
>>> DDR3 bin and the clock speeds used.
>>>
>>> With this DRAM setup, we have verified DDR3 clocks of up to 792MHz
>>> (i.e. DDR3-1600) on the A80-Q7 using a dual-channel configuration.
>>>
>>> [wens at csie.org: Moved dram_sun9i.c to arch/arm/mach-sunxi/; style
>>> cleanup]
>>> Signed-off-by: Chen-Yu Tsai <wens at csie.org>
>>> ---
>>> arch/arm/include/asm/arch-sunxi/clock_sun9i.h | 34 +-
>>> arch/arm/include/asm/arch-sunxi/cpu_sun9i.h | 6 +
>>> arch/arm/include/asm/arch-sunxi/dram.h | 2 +
>>> arch/arm/include/asm/arch-sunxi/dram_sun9i.h | 275 +++++++
>>> arch/arm/mach-sunxi/Makefile | 1 +
>>> arch/arm/mach-sunxi/dram_sun9i.c | 1059
>>> +++++++++++++++++++++++++
>>> board/sunxi/Kconfig | 6 +-
>>> 7 files changed, 1368 insertions(+), 15 deletions(-)
>>> create mode 100644 arch/arm/include/asm/arch-sunxi/dram_sun9i.h
>>> create mode 100644 arch/arm/mach-sunxi/dram_sun9i.c
>>
>>
>> Checkpatch:
>> total: 45 errors, 77 warnings, 42 checks, 1464 lines checked
>
>
> Ugh, ok I've fixed this up locally in my tree, Chen-Yu next time
> please remember to run your patches through check-patch.
Sorry about that. Checkpatch considers #if 0 dead code, but the
reality is that a lot of the marked code may or may not be used
later. We just don't know. A lot of it was marked with C99 style
( // ) comments. Using #if 0 is easier to retain trailing comments
within the currently unused sections. Switching to traditional
C style comments means we might be editing those same lines again.
Otherwise I think I cleaned up most of the 'used' code.
Regards
ChenYu
> Jagan, thanks for the review I've addressed all your comments
> in my tree.
>
> Regards,
>
> Hans
>
>
>
>>
>>>
>>> diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun9i.h
>>> b/arch/arm/include/asm/arch-sunxi/clock_sun9i.h
>>> index a61934fb3661..82881ff8bdaf 100644
>>> --- a/arch/arm/include/asm/arch-sunxi/clock_sun9i.h
>>> +++ b/arch/arm/include/asm/arch-sunxi/clock_sun9i.h
>>> @@ -37,57 +37,61 @@ struct sunxi_ccm_reg {
>>> u8 reserved3[0x04]; /* 0x7c */
>>> u32 ats_cfg; /* 0x80 ats clock configuration */
>>> u32 trace_cfg; /* 0x84 trace clock configuration */
>>> - u8 reserved4[0xf8]; /* 0x88 */
>>> + u8 reserved4[0x14]; /* 0x88 */
>>> + u32 pll_stable_status; /* 0x9c */
>>> + u8 reserved5[0xe0]; /* 0xa0 */
>>> u32 clk_output_a; /* 0x180 clk_output_a */
>>> u32 clk_output_b; /* 0x184 clk_output_a */
>>> - u8 reserved5[0x278]; /* 0x188 */
>>> + u8 reserved6[0x278]; /* 0x188 */
>>>
>>> u32 nand0_clk_cfg; /* 0x400 nand0 clock configuration0 */
>>> u32 nand0_clk_cfg1; /* 0x404 nand1 clock configuration */
>>> - u8 reserved6[0x08]; /* 0x408 */
>>> + u8 reserved7[0x08]; /* 0x408 */
>>> u32 sd0_clk_cfg; /* 0x410 sd0 clock configuration */
>>> u32 sd1_clk_cfg; /* 0x414 sd1 clock configuration */
>>> u32 sd2_clk_cfg; /* 0x418 sd2 clock configuration */
>>> u32 sd3_clk_cfg; /* 0x41c sd3 clock configuration */
>>> - u8 reserved7[0x08]; /* 0x420 */
>>> + u8 reserved8[0x08]; /* 0x420 */
>>> u32 ts_clk_cfg; /* 0x428 transport stream clock cfg */
>>> u32 ss_clk_cfg; /* 0x42c security system clock cfg */
>>> u32 spi0_clk_cfg; /* 0x430 spi0 clock configuration */
>>> u32 spi1_clk_cfg; /* 0x434 spi1 clock configuration */
>>> u32 spi2_clk_cfg; /* 0x438 spi2 clock configuration */
>>> u32 spi3_clk_cfg; /* 0x43c spi3 clock configuration */
>>> - u8 reserved8[0x50]; /* 0x440 */
>>> + u8 reserved9[0x44]; /* 0x440 */
>>> + u32 dram_clk_cfg; /* 0x484 DRAM (controller) clock
>>> configuration */
>>> + u8 reserved10[0x8]; /* 0x488 */
>>> u32 de_clk_cfg; /* 0x490 display engine clock
>>> configuration */
>>> - u8 reserved9[0x04]; /* 0x494 */
>>> + u8 reserved11[0x04]; /* 0x494 */
>>> u32 mp_clk_cfg; /* 0x498 mp clock configuration */
>>> u32 lcd0_clk_cfg; /* 0x49c LCD0 module clock */
>>> u32 lcd1_clk_cfg; /* 0x4a0 LCD1 module clock */
>>> - u8 reserved10[0x1c]; /* 0x4a4 */
>>> + u8 reserved12[0x1c]; /* 0x4a4 */
>>> u32 csi_isp_clk_cfg; /* 0x4c0 CSI ISP module clock */
>>> u32 csi0_clk_cfg; /* 0x4c4 CSI0 module clock */
>>> u32 csi1_clk_cfg; /* 0x4c8 CSI1 module clock */
>>> u32 fd_clk_cfg; /* 0x4cc FD module clock */
>>> u32 ve_clk_cfg; /* 0x4d0 VE module clock */
>>> u32 avs_clk_cfg; /* 0x4d4 AVS module clock */
>>> - u8 reserved11[0x18]; /* 0x4d8 */
>>> + u8 reserved13[0x18]; /* 0x4d8 */
>>> u32 gpu_core_clk_cfg; /* 0x4f0 GPU core clock config */
>>> u32 gpu_mem_clk_cfg; /* 0x4f4 GPU memory clock config */
>>> u32 gpu_axi_clk_cfg; /* 0x4f8 GPU AXI clock config */
>>> - u8 reserved12[0x10]; /* 0x4fc */
>>> + u8 reserved14[0x10]; /* 0x4fc */
>>> u32 gp_adc_clk_cfg; /* 0x50c General Purpose ADC clk config
>>> */
>>> - u8 reserved13[0x70]; /* 0x510 */
>>> + u8 reserved15[0x70]; /* 0x510 */
>>>
>>> u32 ahb_gate0; /* 0x580 AHB0 Gating Register */
>>> u32 ahb_gate1; /* 0x584 AHB1 Gating Register */
>>> u32 ahb_gate2; /* 0x588 AHB2 Gating Register */
>>> - u8 reserved14[0x04]; /* 0x58c */
>>> + u8 reserved16[0x04]; /* 0x58c */
>>> u32 apb0_gate; /* 0x590 APB0 Clock Gating Register */
>>> u32 apb1_gate; /* 0x594 APB1 Clock Gating Register */
>>> - u8 reserved15[0x08]; /* 0x598 */
>>> + u8 reserved17[0x08]; /* 0x598 */
>>> u32 ahb_reset0_cfg; /* 0x5a0 AHB0 Software Reset Register */
>>> u32 ahb_reset1_cfg; /* 0x5a4 AHB1 Software Reset Register */
>>> u32 ahb_reset2_cfg; /* 0x5a8 AHB2 Software Reset Register */
>>> - u8 reserved16[0x04]; /* 0x5ac */
>>> + u8 reserved18[0x04]; /* 0x5ac */
>>> u32 apb0_reset_cfg; /* 0x5b0 Bus Software Reset Register 3 */
>>> u32 apb1_reset_cfg; /* 0x5b4 Bus Software Reset Register 4 */
>>> };
>>> @@ -112,6 +116,8 @@ struct sunxi_ccm_reg {
>>> #define CCM_MMC_CTRL_ENABLE (1 << 31)
>>>
>>> /* ahb_gate0 fields */
>>> +#define AHB_GATE_OFFSET_MCTL 14
>>> +
>>> /* On sun9i all sdc-s share their ahb gate, so ignore (x) */
>>> #define AHB_GATE_OFFSET_NAND0 13
>>> #define AHB_GATE_OFFSET_MMC(x) 8
>>> @@ -126,6 +132,8 @@ struct sunxi_ccm_reg {
>>> #define APB1_GATE_TWI_MASK (0xf << APB1_GATE_TWI_SHIFT)
>>>
>>> /* ahb_reset0_cfg fields */
>>> +#define AHB_RESET_OFFSET_MCTL 14
>>> +
>>> /* On sun9i all sdc-s share their ahb reset, so ignore (x) */
>>> #define AHB_RESET_OFFSET_MMC(x) 8
>>>
>>> diff --git a/arch/arm/include/asm/arch-sunxi/cpu_sun9i.h
>>> b/arch/arm/include/asm/arch-sunxi/cpu_sun9i.h
>>> index 04889c51fac5..acbc94f4c3b8 100644
>>> --- a/arch/arm/include/asm/arch-sunxi/cpu_sun9i.h
>>> +++ b/arch/arm/include/asm/arch-sunxi/cpu_sun9i.h
>>> @@ -38,6 +38,12 @@
>>> #define SUNXI_ARMA9_GIC_BASE (REGS_AHB0_BASE + 0x41000)
>>> #define SUNXI_ARMA9_CPUIF_BASE (REGS_AHB0_BASE + 0x42000)
>>>
>>> +#define SUNXI_DRAM_COM_BASE (REGS_AHB0_BASE + 0x62000)
>>> +#define SUNXI_DRAM_CTL0_BASE (REGS_AHB0_BASE + 0x63000)
>>> +#define SUNXI_DRAM_CTL1_BASE (REGS_AHB0_BASE + 0x64000)
>>> +#define SUNXI_DRAM_PHY0_BASE (REGS_AHB0_BASE + 0x65000)
>>> +#define SUNXI_DRAM_PHY1_BASE (REGS_AHB0_BASE + 0x66000)
>>> +
>>> /* AHB1 Module */
>>> #define SUNXI_DMA_BASE (REGS_AHB1_BASE + 0x002000)
>>> #define SUNXI_USBOTG_BASE (REGS_AHB1_BASE + 0x100000)
>>> diff --git a/arch/arm/include/asm/arch-sunxi/dram.h
>>> b/arch/arm/include/asm/arch-sunxi/dram.h
>>> index 675876ff6cb2..e0be744dba48 100644
>>> --- a/arch/arm/include/asm/arch-sunxi/dram.h
>>> +++ b/arch/arm/include/asm/arch-sunxi/dram.h
>>> @@ -26,6 +26,8 @@
>>> #include <asm/arch/dram_sun8i_a83t.h>
>>> #elif defined(CONFIG_MACH_SUN8I_H3)
>>> #include <asm/arch/dram_sun8i_h3.h>
>>> +#elif defined(CONFIG_MACH_SUN9I)
>>> +#include <asm/arch/dram_sun9i.h>
>>> #else
>>> #include <asm/arch/dram_sun4i.h>
>>> #endif
>>> diff --git a/arch/arm/include/asm/arch-sunxi/dram_sun9i.h
>>> b/arch/arm/include/asm/arch-sunxi/dram_sun9i.h
>>> new file mode 100644
>>> index 000000000000..0e405c3e5225
>>> --- /dev/null
>>> +++ b/arch/arm/include/asm/arch-sunxi/dram_sun9i.h
>>> @@ -0,0 +1,275 @@
>>> +/*
>>> + * Sun8i platform dram controller register and constant defines
>>> + *
>>> + * (C) Copyright 2007-2015 Allwinner Technology Co.
>>> + * Jerry Wang <wangflord at allwinnertech.com>
>>> + * (C) Copyright 2016 Theobroma Systems Design und Consulting GmbH
>>> + * Philipp Tomsich
>>> <philipp.tomsich at theobroma-systems.com>
>>> + *
>>> + * SPDX-License-Identifier: GPL-2.0+
>>> + */
>>> +
>>> +#ifndef _SUNXI_DRAM_SUN9I_H
>>> +#define _SUNXI_DRAM_SUN9I_H
>>> +
>>> +struct sunxi_mctl_com_reg {
>>> + u32 cr; /* 0x00 */
>>> + u32 ccr; /* 0x04 controller configuration register
>>> */
>>> + u32 dbgcr; /* 0x08 */
>>> + u32 dbgcr1; /* 0x0c */
>>> + u32 rmcr; /* 0x10 */
>>> + u8 res1[0x1c]; /* 0x14 */
>>> + u32 mmcr; /* 0x30 */
>>> + u8 res2[0x3c]; /* 0x34 */
>>> + u32 mbagcr; /* 0x70 */
>>> + u32 mbacr; /* 0x74 */
>>> + u8 res3[0x10]; /* 0x78 */
>>> + u32 maer; /* 0x88 */
>>> + u8 res4[0x74]; /* 0x8c */
>>> + u32 mdfscr; /* 0x100 */
>>> + u32 mdfsmer; /* 0x104 */
>>> + u32 mdfsmrmr; /* 0x108 */
>>> + u32 mdfstr[4]; /* 0x10c */
>>> + u32 mdfsgcr; /* 0x11c */
>>> + u8 res5[0x1c]; /* 0x120 */
>>> + u32 mdfsivr; /* 0x13c */
>>> + u8 res6[0xc]; /* 0x140 */
>>> + u32 mdfstcr; /* 0x14c */
>>
>>
>> Unnecessary hexcodes on comments, register details should be fine.
>>
>>> +};
>>> +
>>> +
>>> +struct sunxi_mctl_ctl_reg {
>>> + u32 mstr; /* 0x00 master register */
>>> + u32 stat; /* 0x04 operating mode status register */
>>> + u8 res1[0x8]; /* 0x08 */
>>> + u32 mrctrl[2]; /* 0x10 mode register read/write control
>>> register */
>>> + u32 mstat; /* 0x18 mode register read/write status
>>> register */
>>> + u8 res2[0x4]; /* 0x1c */
>>> + u32 derateen; /* 0x20 temperature derate enable
>>> register */
>>> + u32 derateint; /* 0x24 temperature derate interval
>>> register */
>>> + u8 res3[0x8]; /* 0x28 */
>>> + u32 pwrctl; /* 0x30 low power control register */
>>> + u32 pwrtmg; /* 0x34 low power timing register */
>>> + u8 res4[0x18]; /* 0x38 */
>>> + u32 rfshctl0; /* 0x50 refresh control register 0 */
>>> + u32 rfshctl1; /* 0x54 refresh control register 1 */
>>> + u8 res5[0x8]; /* 0x58 */
>>> + u32 rfshctl3; /* 0x60 refresh control register 3 */
>>> + u32 rfshtmg; /* 0x64 refresh timing register */
>>> + u8 res6[0x68]; /* 0x68 */
>>> + u32 init[6]; /* 0xd0 SDRAM initialisation register */
>>> + u8 res7[0xc]; /* 0xe8 */
>>> + u32 rankctl; /* 0xf4 rank control register */
>>> + u8 res8[0x8]; /* 0xf8 */
>>> + u32 dramtmg[9]; /* 0x100 DRAM timing register */
>>> + u8 res9[0x5c]; /* 0x124 */
>>> + u32 zqctrl[3]; /* 0x180 ZQ control register */
>>> + u32 zqstat; /* 0x18c ZQ status register */
>>> + u32 dfitmg[2]; /* 0x190 DFI timing register */
>>> + u32 dfilpcfg; /* 0x198 DFI low power configuration
>>> register */
>>> + u8 res10[0x4]; /* 0x19c */
>>> + u32 dfiupd[4]; /* 0x1a0 DFI update register */
>>> + u32 dfimisc; /* 0x1b0 DFI miscellaneous control
>>> register */
>>> + u8 res11[0x1c]; /* 0x1b4 */
>>> + u32 trainctl[3]; /* 0x1d0 */
>>> + u32 trainstat; /* 0x1dc */
>>> + u8 res12[0x20]; /* 0x1e0 */
>>> + u32 addrmap[7]; /* 0x200 address map register */
>>> + u8 res13[0x24]; /* 0x21c */
>>> + u32 odtcfg; /* 0x240 ODT configuration register */
>>> + u32 odtmap; /* 0x244 ODT/rank map register */
>>> + u8 res14[0x8]; /* 0x248 */
>>> + u32 sched; /* 0x250 scheduler control register */
>>> + u8 res15[0x4]; /* 0x254 */
>>> + u32 perfhpr0; /* 0x258 high priority read CAM register
>>> 0 */
>>> + u32 perfhpr1; /* 0x25c high priority read CAM register
>>> 1 */
>>> + u32 perflpr0; /* 0x260 low priority read CAM register 0
>>> */
>>> + u32 perflpr1; /* 0x264 low priority read CAM register 1
>>> */
>>> + u32 perfwr0; /* 0x268 write CAM register 0 */
>>> + u32 perfwr1; /* 0x26c write CAM register 1 */
>>
>>
>> Unnecessary hexcodes on comments, register details should be fine.
>>
>>> +};
>>> +
>>> +
>>> +struct sunxi_mctl_phy_reg {
>>> + u8 res0[0x04]; /* 0x00 revision id ??? */
>>> + u32 pir; /* 0x04 PHY initialisation register */
>>> + u32 pgcr[4]; /* 0x08 PHY general configuration
>>> register */
>>> + u32 pgsr[2]; /* 0x18 PHY general status register */
>>> + u32 pllcr; /* 0x20 PLL control register */
>>> + u32 ptr[5]; /* 0x24 PHY timing register */
>>> + u32 acmdlr; /* 0x38 AC master delay line register */
>>> + u32 aclcdlr; /* 0x3c AC local calibrated delay line
>>> register */
>>> + u32 acbdlr[10]; /* 0x40 AC bit delay line register */
>>> + u32 aciocr[6]; /* 0x68 AC IO configuration register */
>>> + u32 dxccr; /* 0x80 DATX8 common configuration
>>> register */
>>> + u32 dsgcr; /* 0x84 DRAM system general config
>>> register */
>>> + u32 dcr; /* 0x88 DRAM configuration register */
>>> + u32 dtpr[4]; /* 0x8c DRAM timing parameters register
>>> */
>>> + u32 mr0; /* 0x9c mode register 0 */
>>> + u32 mr1; /* 0xa0 mode register 1 */
>>> + u32 mr2; /* 0xa4 mode register 2 */
>>> + u32 mr3; /* 0xa8 mode register 3 */
>>> + u32 odtcr; /* 0xac ODT configuration register */
>>> + u32 dtcr; /* 0xb0 data training configuration
>>> register */
>>> + u32 dtar[4]; /* 0xb4 data training address register */
>>> + u32 dtdr[2]; /* 0xc4 data training data register */
>>> + u32 dtedr[2]; /* 0xcc data training eye data register
>>> */
>>> + u32 rdimmgcr[2]; /* 0xd4 RDIMM general configuration
>>> register */
>>> + u32 rdimmcr[2]; /* 0xdc RDIMM control register */
>>> + u32 gpr[2]; /* 0xe4 general purpose register */
>>> + u32 catr[2]; /* 0xec CA training register */
>>> + u32 dqdsr; /* 0xf4 DQS drift register */
>>> + u8 res1[0xc8]; /* 0xf8 */
>>> + u32 bistrr; /* 0x1c0 BIST run register */
>>> + u32 bistwcr; /* 0x1c4 BIST word count register */
>>> + u32 bistmskr[3]; /* 0x1c8 BIST mask register */
>>> + u32 bistlsr; /* 0x1d4 BIST LFSR seed register */
>>> + u32 bistar[3]; /* 0x1d8 BIST address register */
>>> + u32 bistupdr; /* 0x1e4 BIST user pattern data register
>>> */
>>> + u32 bistgsr; /* 0x1e8 BIST general status register */
>>> + u32 bistwer; /* 0x1dc BIST word error register */
>>> + u32 bistber[4]; /* 0x1f0 BIST bit error register */
>>> + u32 bistwcsr; /* 0x200 BIST word count status register
>>> */
>>> + u32 bistfwr[3]; /* 0x204 BIST fail word register */
>>> + u8 res2[0x28]; /* 0x210 */
>>> + u32 iovcr[2]; /* 0x238 IO VREF control register */
>>> + struct ddrphy_zq {
>>> + u32 cr; /* impedance control register */
>>> + u32 pr; /* impedance control data register
>>> */
>>> + u32 dr; /* impedance control data register
>>> */
>>> + u32 sr; /* impedance control status register
>>> */
>>> + } zq[4]; /* 0x240, 0x250, 0x260, 0x270 */
>>> + struct ddrphy_dx {
>>> + u32 gcr[4]; /* DATX8 general configuration
>>> register */
>>> + u32 gsr[3]; /* DATX8 general status register */
>>> + u32 bdlr[7]; /* DATX8 bit delay line register */
>>> + u32 lcdlr[3]; /* DATX8 local calibrated delay line
>>> register */
>>> + u32 mdlr; /* DATX8 master delay line register
>>> */
>>> + u32 gtr; /* DATX8 general timing register */
>>> + u8 res[0x34];
>>> + } dx[4]; /* 0x280, 0x300, 0x380, 0x400 */
>>> +};
>>
>>
>> Unnecessary hexcodes on comments, register details should be fine.
>>>
>>> +
>>> +/*
>>> + * DRAM common (sunxi_mctl_com_reg) register constants.
>>> + */
>>
>>
>> Single line comment, please fix it.
>>
>>> +#define MCTL_CR_RANK_MASK (3 << 0)
>>> +#define MCTL_CR_RANK(x) (((x) - 1) << 0)
>>> +#define MCTL_CR_BANK_MASK (3 << 2)
>>> +#define MCTL_CR_BANK(x) ((x) << 2)
>>> +#define MCTL_CR_ROW_MASK (0xf << 4)
>>> +#define MCTL_CR_ROW(x) (((x) - 1) << 4)
>>> +#define MCTL_CR_PAGE_SIZE_MASK (0xf << 8)
>>> +#define MCTL_CR_PAGE_SIZE(x) ((fls(x) - 4) << 8)
>>> +#define MCTL_CR_BUSW_MASK (3 << 12)
>>> +#define MCTL_CR_BUSW16 (1 << 12)
>>> +#define MCTL_CR_BUSW32 (3 << 12)
>>> +#define MCTL_CR_DRAMTYPE_MASK (7 << 16)
>>> +#define MCTL_CR_DRAMTYPE_DDR2 (2 << 16)
>>> +#define MCTL_CR_DRAMTYPE_DDR3 (3 << 16)
>>> +#define MCTL_CR_DRAMTYPE_LPDDR2 (6 << 16)
>>> +
>>> +#define MCTL_CR_CHANNEL_MASK ((1 << 22) | (1 << 20) | (1 <<
>>> 19))
>>> +#define MCTL_CR_CHANNEL_SINGLE (1 << 22)
>>> +#define MCTL_CR_CHANNEL_DUAL ((1 << 22) | (1 << 20) | (1 <<
>>> 19))
>>> +
>>> +#define MCTL_CCR_CH0_CLK_EN (1 << 15)
>>> +#define MCTL_CCR_CH1_CLK_EN (1 << 31)
>>> +
>>> +/* post_cke_x1024 [bits 16..25]: Cycles to wait after driving CKE high
>>> + to start the SDRAM initialization sequence (in 1024s of cycles). */
>>
>>
>> Multi line comment issue.
>>
>>> +#define MCTL_INIT0_POST_CKE_x1024(n) ((n & 0x0fff) << 16)
>>> +/* pre_cke_x1024 [bits 0..11] Cycles to wait after reset before
>>> + driving CKE high to start the SDRAM initialization (in 1024s of
>>> + cycles) */
>>
>>
>> Multi line comment issue.
>>
>>> +#define MCTL_INIT0_PRE_CKE_x1024(n) ((n & 0x0fff) << 0)
>>> +#define MCTL_INIT1_DRAM_RSTN_x1024(n) ((n & 0xff) << 16)
>>> +#define MCTL_INIT1_FINAL_WAIT_x32(n) ((n & 0x3f) << 8)
>>> +#define MCTL_INIT1_PRE_OCD_x32(n) ((n & 0x0f) << 0)
>>> +#define MCTL_INIT2_IDLE_AFTER_RESET_x32(n) ((n & 0xff) << 8)
>>> +#define MCTL_INIT2_MIN_STABLE_CLOCK_x1(n) ((n & 0x0f) << 0)
>>> +#define MCTL_INIT3_MR(n) ((n & 0xffff) << 16)
>>> +#define MCTL_INIT3_EMR(n) ((n & 0xffff) << 0)
>>> +#define MCTL_INIT4_EMR2(n) ((n & 0xffff) << 16)
>>> +#define MCTL_INIT4_EMR3(n) ((n & 0xffff) << 0)
>>> +#define MCTL_INIT5_DEV_ZQINIT_x32(n) ((n & 0x00ff) << 16)
>>> +#define MCTL_INIT5_MAX_AUTO_INIT_x1024(n) ((n & 0x03ff) << 0);
>>> +
>>> +#define MCTL_DFIMISC_DFI_INIT_COMPLETE_EN (1 << 0)
>>> +#define MCTL_DFIUPD0_DIS_AUTO_CTRLUPD (1 << 31)
>>> +
>>> +#define MCTL_MSTR_DEVICETYPE_DDR3 (0b0001)
>>> +#define MCTL_MSTR_DEVICETYPE_LPDDR2 (0b0100)
>>> +#define MCTL_MSTR_DEVICETYPE_LPDDR3 (0b1000)
>>> +#define MCTL_MSTR_DEVICETYPE(type) \
>>> + ((type == DRAM_TYPE_DDR3) ? MCTL_MSTR_DEVICETYPE_DDR3 \
>>> + : ((type == DRAM_TYPE_LPDDR2) ?
>>> MCTL_MSTR_DEVICETYPE_LPDDR2 : \
>>> +
>>> MCTL_MSTR_DEVICETYPE_LPDDR3))
>>> +#define MCTL_MSTR_BURSTLENGTH4 (0b0010 << 16)
>>> +#define MCTL_MSTR_BURSTLENGTH8 (0b0100 << 16)
>>> +#define MCTL_MSTR_BURSTLENGTH16 (0b1000 << 16)
>>> +#define MCTL_MSTR_BURSTLENGTH(type) \
>>> + ((type == DRAM_TYPE_DDR3) ? MCTL_MSTR_BURSTLENGTH8 \
>>> + : ((type == DRAM_TYPE_LPDDR2) ?
>>> MCTL_MSTR_BURSTLENGTH4 : \
>>> +
>>> MCTL_MSTR_BURSTLENGTH8))
>>> +#define MCTL_MSTR_ACTIVERANKS(x) (((x == 2) ? 0b11 : 0b01) <<
>>> 24)
>>> +#define MCTL_MSTR_BUSWIDTH8 (0b10 << 12)
>>> +#define MCTL_MSTR_BUSWIDTH16 (0b01 << 12)
>>> +#define MCTL_MSTR_BUSWIDTH32 (0b00 << 12)
>>> +#define MCTL_MSTR_2TMODE (1 << 10)
>>> +
>>> +#define MCTL_RFSHCTL3_DIS_AUTO_REFRESH (1 << 0)
>>> +
>>> +#define MCTL_ZQCTRL0_TZQCS(x) (x << 0)
>>> +#define MCTL_ZQCTRL0_TZQCL(x) (x << 16)
>>> +#define MCTL_ZQCTRL0_ZQCL_DIS (1 << 30)
>>> +#define MCTL_ZQCTRL0_ZQCS_DIS (1 << 31)
>>> +#define MCTL_ZQCTRL1_TZQRESET(x) (x << 20)
>>> +#define MCTL_ZQCTRL1_TZQSI_x1024(x) (x << 0)
>>> +#define MCTL_ZQCTRL2_TZRESET_TRIGGER (1 << 0)
>>> +
>>> +#define MCTL_PHY_DCR_BYTEMASK (1 << 10)
>>> +#define MCTL_PHY_DCR_2TMODE (1 << 28)
>>> +#define MCTL_PHY_DCR_DDR8BNK (1 << 3)
>>> +#define MCTL_PHY_DRAMMODE_DDR3 0b11
>>> +#define MCTL_PHY_DRAMMODE_LPDDR2 0b00
>>> +#define MCTL_PHY_DRAMMODE_LPDDR3 0b01
>>> +
>>> +#define MCTL_DTCR_DEFAULT 0x00003007
>>> +#define MCTL_DTCR_RANKEN(n) (((n == 2) ? 0b11 : 0b01) <<
>>> 24)
>>> +
>>> +#define MCTL_PGCR1_ZCKSEL_MASK (0b11 << 23)
>>> +#define MCTL_PGCR1_IODDRM_MASK (0b11 << 7)
>>> +#define MCTL_PGCR1_IODDRM_DDR3 (0b01 << 7)
>>> +#define MCTL_PGCR1_IODDRM_DDR3L (0b10 << 7)
>>> +#define MCTL_PGCR1_INHVT_EN (1 << 26)
>>> +
>>> +#define MCTL_PLLGCR_PLL_BYPASS (1 << 31)
>>> +#define MCTL_PLLGCR_PLL_POWERDOWN (1 << 29)
>>> +
>>> +#define MCTL_PIR_PLL_BYPASS (1 << 17)
>>> +#define MCTL_PIR_MASK (~(1 << 17))
>>> +#define MCTL_PIR_INIT (1 << 0)
>>> +
>>> +#define MCTL_PGSR0_ERRORS (0x1ff << 20)
>>> +
>>> +/* Constants for assembling MR0 */
>>> +#define DDR3_MR0_PPD_FAST_EXIT (1 << 12)
>>> +#define DDR3_MR0_WR(n) \
>>> + ( (n <= 8) ? ((n - 4) << 9) : (((n >> 1) & 0x7) << 9) )
>>> +#define DDR3_MR0_CL(n) \
>>> + ( (((n - 4) & 0x7) << 4) | (((n - 4) & 0x8) >> 2) )
>>> +#define DDR3_MR0_BL8 (0b00 << 0)
>>> +
>>> +#define DDR3_MR1_RTT120OHM ((0 << 9) | (1 << 6) | (0 <<
>>> 2))
>>> +
>>> +#define DDR3_MR2_TWL(n) \
>>> + ( ((n - 5) & 0x7) << 3 )
>>> +
>>> +#define MCTL_NS2CYCLES_CEIL(ns) ((ns * (CONFIG_DRAM_CLK / 2)
>>> + 999) / 1000)
>>> +
>>> +#define DRAM_TYPE_DDR3 3
>>> +#define DRAM_TYPE_LPDDR2 6
>>> +#define DRAM_TYPE_LPDDR3 7
>>> +
>>> +#endif
>>> diff --git a/arch/arm/mach-sunxi/Makefile b/arch/arm/mach-sunxi/Makefile
>>> index 25367cf38006..9d07d6b84c1e 100644
>>> --- a/arch/arm/mach-sunxi/Makefile
>>> +++ b/arch/arm/mach-sunxi/Makefile
>>> @@ -49,4 +49,5 @@ obj-$(CONFIG_MACH_SUN8I_A23) += dram_sun8i_a23.o
>>> obj-$(CONFIG_MACH_SUN8I_A33) += dram_sun8i_a33.o
>>> obj-$(CONFIG_MACH_SUN8I_A83T) += dram_sun8i_a83t.o
>>> obj-$(CONFIG_MACH_SUN8I_H3) += dram_sun8i_h3.o
>>> +obj-$(CONFIG_MACH_SUN9I) += dram_sun9i.o
>>> endif
>>> diff --git a/arch/arm/mach-sunxi/dram_sun9i.c
>>> b/arch/arm/mach-sunxi/dram_sun9i.c
>>> new file mode 100644
>>> index 000000000000..825c415a0a46
>>> --- /dev/null
>>> +++ b/arch/arm/mach-sunxi/dram_sun9i.c
>>> @@ -0,0 +1,1059 @@
>>> +/*
>>> + * sun9i dram controller initialisation
>>> + *
>>> + * (C) Copyright 2007-2015
>>> + * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
>>> + * Jerry Wang <wangflord at allwinnertech.com>
>>> + *
>>> + * (C) Copyright 2016 Theobroma Systems Design und Consulting GmbH
>>> + * Philipp Tomsich
>>> <philipp.tomsich at theobroma-systems.com>
>>> + *
>>> + * SPDX-License-Identifier: GPL-2.0+
>>> + */
>>> +
>>> +#include <common.h>
>>> +#include <dm.h>
>>> +#include <errno.h>
>>> +#include <ram.h>
>>> +#include <asm/io.h>
>>> +#include <asm/arch/clock.h>
>>> +#include <asm/arch/dram.h>
>>> +
>>> +DECLARE_GLOBAL_DATA_PTR;
>>> +
>>> +#define DRAM_CLK (CONFIG_DRAM_CLK * 1000000)
>>> +
>>> +/*
>>> + * The following amounts to an extensive rewrite of the code received
>>> from
>>> + * Allwinner as part of the open-source bootloader release (refer to
>>> + * https://github.com/allwinner-zh/bootloader.git) and augments the
>>> upstream
>>> + * sources (which act as the primary reference point for the inner
>>> workings
>>> + * of the 'underdocumented' DRAM controller in the A80) using the
>>> following
>>> + * documentation for other memory controllers based on the (Synopsys)
>>> + * Designware IP (DDR memory protocol controller and DDR PHY)
>>> + * * TI Keystone II Architecture: DDR3 Memory Controller, User's Guide
>>> + * Document 'SPRUHN7C', Oct 2013 (revised March 2015)
>>> + * * Xilinx Zynq UltraScale+ MPSoC Register Reference
>>> + * document ug1087 (v1.0)
>>> + * Note that the Zynq-documentation provides a very close match for the
>>> DDR
>>> + * memory protocol controller (and provides a very good guide to the
>>> rounding
>>> + * rules for various timings), whereas the TI Keystone II document
>>> should be
>>> + * referred to for DDR PHY specifics only.
>>> + *
>>> + * The DRAM controller in the A80 runs at half the frequency of the DDR
>>> PHY
>>> + * (i.e. the rules for MEMC_FREQ_RATIO=2 from the Zynq-documentation
>>> apply).
>>> + *
>>> + * Known limitations
>>> + * =================
>>> + * In the current state, the following features are not fully supported
>>> and
>>> + * a number of simplifying assumptions have been made:
>>> + * 1) Only DDR3 support is implemented, as our test platform (the
>>> A80-Q7
>>> + * module) is designed to accomodate DDR3/DDR3L.
>>> + * 2) Only 2T-mode has been implemented and tested.
>>> + * 3) The controller supports two different clocking strategies (PLL6
>>> can
>>> + * either be 2*CK or CK/2)... we only support the 2*CK clock at
>>> this
>>> + * time and haven't verified whether the alternative clocking
>>> strategy
>>> + * works. If you are interested in porting this over/testing this,
>>> + * please refer to cases where bit 0 of 'dram_tpr8' is tested in
>>> the
>>> + * original code from Allwinner.
>>> + * 4) Support for 2 ranks per controller is not implemented (as we
>>> don't
>>> + * the hardware to test it).
>>> + *
>>> + * Future directions
>>> + * =================
>>> + * The driver should be driven from a device-tree based configuration
>>> that
>>> + * can dynamically provide the necessary timing parameters (i.e. target
>>> + * frequency and speed-bin information)---the data structures used in
>>> the
>>> + * calculation of the timing parameters are already designed to capture
>>> + * similar information as the device tree would provide.
>>> + *
>>> + * To enable a device-tree based configuration of the sun9i platform, we
>>> + * will need to enable CONFIG_TPL and bootstrap in 3 stages: initially
>>> + * into SRAM A1 (40KB) and next into SRAM A2 (160KB)---which would be
>>> the
>>> + * stage to initialise the platform via the device-tree---before having
>>> + * the full U-Boot run from DDR.
>>> + */
>>> +
>>> +
>>> +
>>
>>
>> Un necssary spaces.
>>
>>> +/*
>>> + * A number of DDR3 timings are given as "the greater of a fixed number
>>> of
>>> + * clock cycles (CK) or nanoseconds. We express these using a structure
>>> + * that holds a cycle count and a duration in picoseconds (so we can
>>> model
>>> + * sub-ns timings, such as 7.5ns without losing precision or resorting
>>> to
>>> + * rounding up early.
>>> + */
>>> +struct dram_sun9i_timing {
>>> + u32 ck;
>>> + u32 ps;
>>> +};
>>> +
>>> +/* */
>>> +struct dram_sun9i_cl_cwl_timing {
>>> + u32 CL;
>>> + u32 CWL;
>>> + u32 tCKmin; /* in ps */
>>> + u32 tCKmax; /* in ps */
>>> +};
>>> +
>>> +struct dram_sun9i_para {
>>> + u32 dram_type;
>>> +
>>> + u8 bus_width;
>>> + u8 chan;
>>> + u8 rank;
>>> + u8 rows;
>>> + u16 page_size;
>>> +
>>> + /* Timing information for each speed-bin */
>>> + struct dram_sun9i_cl_cwl_timing *cl_cwl_table;
>>> + u32 cl_cwl_numentries;
>>> +
>>> + /*
>>> + * For the timings, we try to keep the order and grouping used in
>>> + * JEDEC Standard No. 79-3F
>>> + */
>>> +
>>> + /* timings */
>>> + u32 tREFI; /* in ns */
>>> + u32 tRFC; /* in ns */
>>> +
>>> + u32 tRAS; /* in ps */
>>> +
>>> + /* command and address timing */
>>> + u32 tDLLK; /* in nCK */
>>> + struct dram_sun9i_timing tRTP;
>>> + struct dram_sun9i_timing tWTR;
>>> + u32 tWR; /* in nCK */
>>> + u32 tMRD; /* in nCK */
>>> + struct dram_sun9i_timing tMOD;
>>> + u32 tRCD; /* in ps */
>>> + u32 tRP; /* in ps */
>>> + u32 tRC; /* in ps */
>>> + u32 tCCD; /* in nCK */
>>> + struct dram_sun9i_timing tRRD;
>>> + u32 tFAW; /* in ps */
>>> +
>>> + /* calibration timing */
>>> +#if 0
>>> + struct dram_sun9i_timing tZQinit;
>>> +#endif
>>> + struct dram_sun9i_timing tZQoper;
>>> + struct dram_sun9i_timing tZQCS;
>>> +
>>> + /* reset timing */
>>> +#if 0
>>> + struct dram_sun9i_timing tXPR;
>>> +#endif
>>> +
>>> + /* self-refresh timings */
>>> + struct dram_sun9i_timing tXS;
>>> + u32 tXSDLL; /* in nCK */
>>> +#if 0
>>> + struct dram_sun9i_timing tCKESR;
>>> +#endif
>>> + struct dram_sun9i_timing tCKSRE;
>>> + struct dram_sun9i_timing tCKSRX;
>>> +
>>> + /* power-down timings */
>>> + struct dram_sun9i_timing tXP;
>>> + struct dram_sun9i_timing tXPDLL;
>>> + struct dram_sun9i_timing tCKE;
>>> +
>>> + /* write leveling timings */
>>> + u32 tWLMRD; /* min, in nCK */
>>> +#if 0
>>> + u32 tWLDQSEN; /* min, in nCK */
>>> +#endif
>>> + u32 tWLO; /* max, in ns */
>>> +#if 0
>>> + u32 tWLOE; /* max, in ns */
>>> +
>>> + u32 tCKDPX; /* in nCK */
>>> + u32 tCKCSX; /* in nCK */
>>> +#endif
>>
>>
>> #if 0
>>
>>> +};
>>> +
>>> +
>>> +void sdelay(unsigned long);
>>> +static void mctl_sys_init(void);
>>> +
>>> +#define SCHED_RDWR_IDLE_GAP(n) ((n & 0xff) << 24)
>>> +#define SCHED_GO2CRITICAL_HYSTERESIS(n) ((n & 0xff) << 16)
>>> +#define SCHED_LPR_NUM_ENTRIES(n) ((n & 0xff) << 8)
>>> +#define SCHED_PAGECLOSE (1 << 2)
>>> +#define SCHED_PREFER_WRITE (1 << 1)
>>> +#define SCHED_FORCE_LOW_PRI_N (1 << 0)
>>> +
>>> +#define SCHED_CONFIG (SCHED_RDWR_IDLE_GAP(0xf) | \
>>> +
>>> SCHED_GO2CRITICAL_HYSTERESIS(0x80) | \
>>> + SCHED_LPR_NUM_ENTRIES(0x20) |
>>> \
>>> + SCHED_FORCE_LOW_PRI_N)
>>> +#define PERFHPR0_CONFIG 0x0000001f
>>> +#define PERFHPR1_CONFIG 0x1f00001f
>>> +#define PERFLPR0_CONFIG 0x000000ff
>>> +#define PERFLPR1_CONFIG 0x0f0000ff
>>> +#define PERFWR0_CONFIG 0x000000ff
>>> +#define PERFWR1_CONFIG 0x0f0001ff
>>> +
>>> +
>>
>>
>> space
>>
>>> +static void mctl_ctl_sched_init(unsigned long base)
>>> +{
>>> + struct sunxi_mctl_ctl_reg *mctl_ctl =
>>> + (struct sunxi_mctl_ctl_reg *)base;
>>> +
>>> + /* Needs to be done before the global clk enable... */
>>> + writel(SCHED_CONFIG, &mctl_ctl->sched);
>>> + writel(PERFHPR0_CONFIG, &mctl_ctl->perfhpr0);
>>> + writel(PERFHPR1_CONFIG, &mctl_ctl->perfhpr1);
>>> + writel(PERFLPR0_CONFIG, &mctl_ctl->perflpr0);
>>> + writel(PERFLPR1_CONFIG, &mctl_ctl->perflpr1);
>>> + writel(PERFWR0_CONFIG, &mctl_ctl->perfwr0);
>>> + writel(PERFWR1_CONFIG, &mctl_ctl->perfwr1);
>>> +}
>>> +
>>> +
>>
>>
>> space
>>
>>> +static void mctl_sys_init()
>>> +{
>>> + struct sunxi_ccm_reg * const ccm =
>>> + (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
>>> + struct sunxi_mctl_com_reg * const mctl_com =
>>> + (struct sunxi_mctl_com_reg *)SUNXI_DRAM_COM_BASE;
>>> +
>>> +#if 0
>>> + clock_set_pll6(use_2channelPLL ? (DRAM_CLK * 2) : (DRAM_CLK / 2),
>>> false);
>>> +#endif
>>
>>
>> #if 0
>>
>>> +
>>> + debug("Setting PLL6 to %d\n", DRAM_CLK * 2);
>>> + clock_set_pll6(DRAM_CLK * 2);
>>> +
>>> +#if 0
>>> + if ((para->dram_clk <= 400)|((para->dram_tpr8 & 0x1)==0)) {
>>> + /* PLL6 should be 2*CK */
>>> + /* ccm_setup_pll6_ddr_clk(PLL6_DDR_CLK); */
>>> + ccm_setup_pll6_ddr_clk((1000000 * (para->dram_clk) * 2),
>>> 0);
>>> + } else {
>>> + /* PLL6 should be CK/2 */
>>> + ccm_setup_pll6_ddr_clk((1000000 * (para->dram_clk) / 2),
>>> 1);
>>> + }
>>> +#endif
>>
>>
>> #if 0
>>
>>> +
>>> +#if 0
>>> + if (para->dram_tpr13 & (0xf<<18)) {
>>> + /*
>>> + * bit21:bit18=0001:pll swing 0.4
>>> + * bit21:bit18=0010:pll swing 0.3
>>> + * bit21:bit18=0100:pll swing 0.2
>>> + * bit21:bit18=1000:pll swing 0.1
>>> + */
>>> + dram_dbg("DRAM fre extend open !\n");
>>> + reg_val=mctl_read_w(CCM_PLL6_DDR_REG);
>>> + reg_val&=(0x1<<16);
>>> + reg_val=reg_val>>16;
>>> +
>>> + if(para->dram_tpr13 & (0x1<<18))
>>> + {
>>> + mctl_write_w(CCM_PLL_BASE + 0x114,
>>> (0x3333U|(0x3<<17)|(reg_val<<19)|(0x120U<<20)|(0x2U<<29)|(0x1U<<31)));
>>> + }
>>> + else if(para->dram_tpr13 &
>>> (0x1<<19))//------------------------------------------------------------------------------------------------------------------------------------------------------------
>>> + {
>>> + mctl_write_w(CCM_PLL_BASE + 0x114,
>>> (0x6666U|(0x3U<<17)|(reg_val<<19)|(0xD8U<<20)|(0x2U<<29)|(0x1U<<31)));
>>> + }
>>> + else if(para->dram_tpr13 &
>>> (0x1<<20))//------------------------------------------------------------------------------------------------------------------------------------------------------------
>>> + {
>>> + mctl_write_w(CCM_PLL_BASE + 0x114,
>>> (0x9999U|(0x3U<<17)|(reg_val<<19)|(0x90U<<20)|(0x2U<<29)|(0x1U<<31)));
>>> + }
>>> + else if(para->dram_tpr13 &
>>> (0x1<<21))//------------------------------------------------------------------------------------------------------------------------------------------------------------
>>> + {
>>> + mctl_write_w(CCM_PLL_BASE + 0x114,
>>> (0xccccU|(0x3U<<17)|(reg_val<<19)|(0x48U<<20)|(0x2U<<29)|(0x1U<<31)));
>>
>>
>> too many erros on style.
>>
>>> + }
>>> +
>>> + reg_val = mctl_read_w(CCM_PLL6_DDR_REG);//frequency
>>> extend open
>>> + reg_val |= ((0x1<<24)|(0x1<<30));
>>> + mctl_write_w(CCM_PLL6_DDR_REG, reg_val);
>>> +
>>> +
>>> + while(mctl_read_w(CCM_PLL6_DDR_REG) & (0x1<<30));
>>> + }
>>> +
>>> + aw_delay(0x20000); //make some delay
>>> +#endif
>>> +
>>> +#if 1
>>> + /* assert mctl reset */
>>> + clrbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_RESET_OFFSET_MCTL);
>>> + /* stop mctl clock */
>>> + clrbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_MCTL);
>>> +
>>> + sdelay(2000);
>>> +#endif
>>> +
>>> + /* deassert mctl reset */
>>> + setbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_RESET_OFFSET_MCTL);
>>> + /* enable mctl clock */
>>> + setbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_MCTL);
>>> +
>>> + /* set up the transactions scheduling before enabling the global
>>> clk */
>>> + mctl_ctl_sched_init(SUNXI_DRAM_CTL0_BASE);
>>> + mctl_ctl_sched_init(SUNXI_DRAM_CTL1_BASE);
>>> + sdelay(1000);
>>> +
>>> + debug("2\n");
>>> +
>>> + /* (3 << 12): PLL_DDR */
>>> + writel((3 << 12) | (1 << 16), &ccm->dram_clk_cfg);
>>> + do {
>>> + debug("Waiting for DRAM_CLK_CFG\n");
>>> + sdelay(10000);
>>> + } while (readl(&ccm->dram_clk_cfg) & (1 << 16));
>>> + setbits_le32(&ccm->dram_clk_cfg, (1 << 31));
>>> +
>>> + /* TODO: we only support the common case ... i.e. 2*CK */
>>> + setbits_le32(&mctl_com->ccr, (1 << 14) | (1 << 30));
>>> + writel(2, &mctl_com->rmcr); /* controller clock is PLL6/4 */
>>> +
>>> + sdelay(2000);
>>> +
>>> +#if 0
>>> + if ((para->dram_clk <= 400) | ((para->dram_tpr8 & 0x1) == 0)) {
>>> + /* PLL6 should be 2*CK */
>>> + /* gating 2 channel pll */
>>> + reg_val = mctl_read_w(MC_CCR);
>>> + reg_val |= ((0x1 << 14) | (0x1U << 30));
>>> + mctl_write_w(MC_CCR, reg_val);
>>> + mctl_write_w(MC_RMCR, 0x2); /* controller clock use
>>> pll6/4 */
>>> + } else {
>>> + /* enalbe 2 channel pll */
>>> + reg_val = mctl_read_w(MC_CCR);
>>> + reg_val &= ~((0x1 << 14) | (0x1U << 30));
>>> + mctl_write_w(MC_CCR, reg_val);
>>> + mctl_write_w(MC_RMCR, 0x0); /* controller clock use pll6
>>> */
>>> + }
>>> +#endif
>>> +
>>> +#if 0
>>> + reg_val = mctl_read_w(MC_CCR);
>>> + reg_val &= ~((0x1<<15)|(0x1U<<31));
>>> + mctl_write_w(MC_CCR, reg_val);
>>> + aw_delay(20);
>>> + //aw_delay(0x10);
>>> +#endif
>>> +
>>> + clrbits_le32(&mctl_com->ccr, MCTL_CCR_CH0_CLK_EN |
>>> MCTL_CCR_CH1_CLK_EN);
>>> + sdelay(1000);
>>> +
>>> + setbits_le32(&mctl_com->ccr, MCTL_CCR_CH0_CLK_EN);
>>> +#if 0
>>> + /* TODO */
>>> + if (para->chan == 2)
>>> +#endif
>>> + setbits_le32(&mctl_com->ccr, MCTL_CCR_CH1_CLK_EN);
>>> +}
>>> +
>>> +
>>> +static void mctl_com_init(struct dram_sun9i_para* para)
>>> +{
>>> + struct sunxi_mctl_com_reg * const mctl_com =
>>> + (struct sunxi_mctl_com_reg *)SUNXI_DRAM_COM_BASE;
>>> +
>>> + /* TODO: hard-wired for DDR3 now */
>>> + writel(((para->chan == 2) ? MCTL_CR_CHANNEL_DUAL :
>>> MCTL_CR_CHANNEL_SINGLE)
>>> + | MCTL_CR_DRAMTYPE_DDR3 | MCTL_CR_BANK(1) |
>>> MCTL_CR_ROW(para->rows)
>>> + | ((para->bus_width == 32) ? MCTL_CR_BUSW32 :
>>> MCTL_CR_BUSW16)
>>> + | MCTL_CR_PAGE_SIZE(para->page_size) |
>>> MCTL_CR_RANK(para->rank),
>>> + &mctl_com->cr);
>>> +
>>> + debug("CR: %d\n", readl(&mctl_com->cr));
>>> +}
>>> +
>>> +
>>> +static u32 mctl_channel_init(u32 ch_index, struct dram_sun9i_para* para)
>>> +{
>>> + struct sunxi_mctl_ctl_reg *mctl_ctl;
>>> + struct sunxi_mctl_phy_reg *mctl_phy;
>>> +
>>> + u32 CL = 0;
>>> + u32 CWL = 0;
>>> + /* initialise to silence compiler warnings due to non-DDR3
>>> placeholder code */
>>> + u16 mr[4] = { 0, };
>>> +
>>> +#define PS2CYCLES_FLOOR(n) ((n * CONFIG_DRAM_CLK) / 1000000)
>>> +#define PS2CYCLES_ROUNDUP(n) ((n * CONFIG_DRAM_CLK + 999999) / 1000000)
>>> +#define NS2CYCLES_FLOOR(n) ((n * CONFIG_DRAM_CLK) / 1000)
>>> +#define NS2CYCLES_ROUNDUP(n) ((n * CONFIG_DRAM_CLK + 999) / 1000)
>>> +#define MAX(a, b) ((a) > (b) ? (a) : (b))
>>> +
>>> + /*
>>> + * Convert the values to cycle counts (nCK) from what is provided
>>> + * by the definition of each speed bin.
>>> + */
>>> +#if 0
>>> + const u32 tREFI = NS2CYCLES_FLOOR(para->tREFI);
>>> +#endif
>>> + const u32 tREFI = NS2CYCLES_FLOOR(para->tREFI);
>>> + const u32 tRFC = NS2CYCLES_ROUNDUP(para->tRFC);
>>> + const u32 tRCD = PS2CYCLES_ROUNDUP(para->tRCD);
>>> + const u32 tRP = PS2CYCLES_ROUNDUP(para->tRP);
>>> + const u32 tRC = PS2CYCLES_ROUNDUP(para->tRC);
>>> + const u32 tRAS = PS2CYCLES_ROUNDUP(para->tRAS);
>>> +
>>> + /* command and address timing */
>>> + const u32 tDLLK = para->tDLLK;
>>> + const u32 tRTP = MAX(para->tRTP.ck,
>>> PS2CYCLES_ROUNDUP(para->tRTP.ps));
>>> + const u32 tWTR = MAX(para->tWTR.ck,
>>> PS2CYCLES_ROUNDUP(para->tWTR.ps));
>>> + const u32 tWR = NS2CYCLES_FLOOR(para->tWR);
>>> + const u32 tMRD = para->tMRD;
>>> + const u32 tMOD = MAX(para->tMOD.ck,
>>> PS2CYCLES_ROUNDUP(para->tMOD.ps));
>>> + const u32 tCCD = para->tCCD;
>>> + const u32 tRRD = MAX(para->tRRD.ck,
>>> PS2CYCLES_ROUNDUP(para->tRRD.ps));
>>> + const u32 tFAW = PS2CYCLES_ROUNDUP(para->tFAW);
>>> +
>>> + /* calibration timings */
>>> +#if 0
>>> + const u32 tZQinit = MAX(para->tZQinit.ck,
>>> PS2CYCLES_ROUNDUP(para->tZQinit.ps));
>>> +#endif
>>> + const u32 tZQoper = MAX(para->tZQoper.ck,
>>> PS2CYCLES_ROUNDUP(para->tZQoper.ps));
>>> + const u32 tZQCS = MAX(para->tZQCS.ck,
>>> PS2CYCLES_ROUNDUP(para->tZQCS.ps));
>>> +
>>> + /* reset timing */
>>> +#if 0
>>> + const u32 tXPR = MAX(para->tXPR.ck,
>>> PS2CYCLES_ROUNDUP(para->tXPR.ps));
>>> +#endif
>>> +
>>> + /* power-down timings */
>>> + const u32 tXP = MAX(para->tXP.ck,
>>> PS2CYCLES_ROUNDUP(para->tXP.ps));
>>> + const u32 tXPDLL = MAX(para->tXPDLL.ck,
>>> PS2CYCLES_ROUNDUP(para->tXPDLL.ps));
>>> + const u32 tCKE = MAX(para->tCKE.ck,
>>> PS2CYCLES_ROUNDUP(para->tCKE.ps));
>>> +
>>> + /*
>>> + * self-refresh timings (keep below power-down timings, as tCKESR
>>> + * needs to be calculated based on the nCK value of tCKE)
>>> + */
>>> + const u32 tXS = MAX(para->tXS.ck,
>>> PS2CYCLES_ROUNDUP(para->tXS.ps));
>>> + const u32 tXSDLL = para->tXSDLL;
>>> + const u32 tCKSRE = MAX(para->tCKSRE.ck,
>>> PS2CYCLES_ROUNDUP(para->tCKSRE.ps));
>>> + const u32 tCKESR = tCKE + 1;
>>> + const u32 tCKSRX = MAX(para->tCKSRX.ck,
>>> PS2CYCLES_ROUNDUP(para->tCKSRX.ps));
>>> +
>>> + /* write leveling timings */
>>> + const u32 tWLMRD = para->tWLMRD;
>>> +#if 0
>>> + const u32 tWLDQSEN = para->tWLDQSEN;
>>> +#endif
>>> + const u32 tWLO = PS2CYCLES_FLOOR(para->tWLO);
>>> +#if 0
>>> + const u32 tWLOE = PS2CYCLES_FLOOR(para->tWLOE);
>>> +#endif
>>> +
>>> + const u32 tRASmax = tREFI * 9;
>>> + int i;
>>> +
>>> + for (i = 0; i < para->cl_cwl_numentries; ++i) {
>>> + const u32 tCK = 1000000 / CONFIG_DRAM_CLK;
>>> +
>>> + if ((para->cl_cwl_table[i].tCKmin <= tCK) &&
>>> + (tCK < para->cl_cwl_table[i].tCKmax)) {
>>> + CL = para->cl_cwl_table[i].CL;
>>> + CWL = para->cl_cwl_table[i].CWL;
>>> +
>>> + debug("found CL/CWL: CL = %d, CWL = %d\n", CL,
>>> CWL);
>>> + break;
>>> + }
>>> + }
>>> +
>>> + if ((CL == 0) && (CWL == 0)) {
>>> + printf("failed to find valid CL/CWL for operating point
>>> %d MHz\n",
>>> + CONFIG_DRAM_CLK);
>>> + return 0;
>>> + }
>>> +
>>> + if (ch_index == 0) {
>>> + mctl_ctl = (struct sunxi_mctl_ctl_reg
>>> *)SUNXI_DRAM_CTL0_BASE;
>>> + mctl_phy = (struct sunxi_mctl_phy_reg
>>> *)SUNXI_DRAM_PHY0_BASE;
>>> + } else {
>>> + mctl_ctl = (struct sunxi_mctl_ctl_reg
>>> *)SUNXI_DRAM_CTL1_BASE;
>>> + mctl_phy = (struct sunxi_mctl_phy_reg
>>> *)SUNXI_DRAM_PHY1_BASE;
>>> + }
>>> +
>>> + if (para->dram_type == DRAM_TYPE_DDR3) {
>>> + mr[0] = DDR3_MR0_PPD_FAST_EXIT | DDR3_MR0_WR(tWR) |
>>> DDR3_MR0_CL(CL);
>>> + mr[1] = DDR3_MR1_RTT120OHM;
>>> + mr[2] = DDR3_MR2_TWL(CWL);
>>> + mr[3] = 0;
>>> +
>>> + /*
>>> + * DRAM3 initialisation requires holding CKE LOW for
>>> + * at least 500us prior to starting the initialisation
>>> + * sequence and at least 10ns after driving CKE HIGH
>>> + * before the initialisation sequence may be started).
>>> +
>>> + * Refer to Micron document "TN-41-07: DDR3 Power-Up,
>>> + * Initialization, and Reset DDR3 Initialization
>>> + * Routine" for details).
>>> + */
>>> + writel(MCTL_INIT0_POST_CKE_x1024(1)
>>> + | MCTL_INIT0_PRE_CKE_x1024((500*CONFIG_DRAM_CLK +
>>> 1023)/1024), /* 500us */
>>> + &mctl_ctl->init[0]);
>>> + writel(MCTL_INIT1_DRAM_RSTN_x1024(1),
>>> + &mctl_ctl->init[1]);
>>> + // INIT2 is not used for DDR3
>>> + writel(MCTL_INIT3_MR(mr[0]) | MCTL_INIT3_EMR(mr[1]),
>>> + &mctl_ctl->init[3]);
>>> + writel(MCTL_INIT4_EMR2(mr[2]) | MCTL_INIT4_EMR3(mr[3]),
>>> + &mctl_ctl->init[4]);
>>> + writel(MCTL_INIT5_DEV_ZQINIT_x32(512/32), /* 512 cycles
>>> */
>>> + &mctl_ctl->init[5]);
>>> + } else {
>>> +#if 0 /* UNTESTED */
>>> + /*
>>> + * LPDDR2 and/or LPDDR3 require a 200us minimum delay
>>> + * after driving CKE HIGH in the initialisation sequence.
>>> + */
>>> + writel(MCTL_INIT0_POST_CKE_x1024((200*CONFIG_DRAM_CLK +
>>> 1023)/1024),
>>> + &mctl_ctl->init[0]);
>>> + writel(MCTL_INIT1_DRAM_RSTN_x1024(1),
>>> + &mctl_ctl->init[1]);
>>> + writel(MCTL_INIT2_IDLE_AFTER_RESET_x32((CONFIG_DRAM_CLK +
>>> 31)/32) /* 1us */
>>> + | MCTL_INIT2_MIN_STABLE_CLOCK_x1(5), /* 5 cycles
>>> */
>>> + &mctl_ctl->init[2]);
>>> + writel(MCTL_INIT3_MR(mr[1]) | MCTL_INIT3_EMR(mr[2]),
>>> + &mctl_ctl->init[3]);
>>> + writel(MCTL_INIT4_EMR2(mr[3]),
>>> + &mctl_ctl->init[4]);
>>> + writel(MCTL_INIT5_DEV_ZQINIT_x32((CONFIG_DRAM_CLK +
>>> 31)/32) /* 1us */
>>> + | MCTL_INIT5_MAX_AUTO_INIT_x1024((10 *
>>> CONFIG_DRAM_CLK + 1023)/1024),
>>> + &mctl_ctl->init[5]);
>>> +#endif
>>> + }
>>> +
>>> + /* (DDR3) We always use a burst-length of 8. */
>>> +#define MCTL_BL 8
>>> + /* wr2pre: WL + BL/2 + tWR */
>>> +#define WR2PRE (MCTL_BL/2 + CWL + tWTR)
>>> + /* wr2rd = CWL + BL/2 + tWTR */
>>> +#define WR2RD (MCTL_BL/2 + CWL + tWTR)
>>> + /*
>>> + * rd2wr = RL + BL/2 + 2 - WL (for DDR3)
>>> + * rd2wr = RL + BL/2 + RU(tDQSCKmax/tCK) + 1 - WL (for
>>> LPDDR2/LPDDR3)
>>> + */
>>> +#define RD2WR (CL + MCTL_BL/2 + 2 - CWL)
>>> +#define MCTL_PHY_TRTW 0
>>> +#define MCTL_PHY_TRTODT 0
>>> +
>>> +#define MCTL_DIV2(n) ((n + 1)/2)
>>> +#define MCTL_DIV32(n) (n/32)
>>> +#define MCTL_DIV1024(n) (n/1024)
>>> +
>>> + writel((MCTL_DIV2(WR2PRE) << 24) | (MCTL_DIV2(tFAW) << 16) |
>>> + (MCTL_DIV1024(tRASmax) << 8) | (MCTL_DIV2(tRAS) << 0),
>>> + &mctl_ctl->dramtmg[0]);
>>> + writel((MCTL_DIV2(tXP) << 16) | (MCTL_DIV2(tRTP) << 8) |
>>> + (MCTL_DIV2(tRC) << 0),
>>> + &mctl_ctl->dramtmg[1]);
>>> + writel((MCTL_DIV2(CWL) << 24) | (MCTL_DIV2(CL) << 16) |
>>> + (MCTL_DIV2(RD2WR) << 8) | (MCTL_DIV2(WR2RD) << 0),
>>> + &mctl_ctl->dramtmg[2]);
>>> + /*
>>> + * Note: tMRW is located at bit 16 (and up) in DRAMTMG3...
>>> + * this is only relevant for LPDDR2/LPDDR3
>>> + */
>>> + writel((MCTL_DIV2(tMRD) << 12) | (MCTL_DIV2(tMOD) << 0),
>>> + &mctl_ctl->dramtmg[3]);
>>> + writel((MCTL_DIV2(tRCD) << 24) | (MCTL_DIV2(tCCD) << 16) |
>>> + (MCTL_DIV2(tRRD) << 8) | (MCTL_DIV2(tRP) << 0),
>>> + &mctl_ctl->dramtmg[4]);
>>> + writel((MCTL_DIV2(tCKSRX) << 24) | (MCTL_DIV2(tCKSRE) << 16) |
>>> + (MCTL_DIV2(tCKESR) << 8) | (MCTL_DIV2(tCKE) << 0),
>>> + &mctl_ctl->dramtmg[5]);
>>> +
>>> + /* These timings are relevant for LPDDR2/LPDDR3 only */
>>> +#if 0
>>> + writel((MCTL_TCKDPDE << 24) | (MCTL_TCKDPX << 16) |
>>> + (MCTL_TCKCSX << 0), &mctl_ctl->dramtmg[6]);
>>> +#endif
>>> +#if 0
>>> + printf("DRAMTMG7 reset value: 0x%x\n",
>>> readl(&mctl_ctl->dramtmg[7]));
>>> + /* DRAMTMG7 reset value: 0x202 */
>>> + /* DRAMTMG7 should contain t_ckpde and t_ckpdx: check reset
>>> values!!! */
>>> + printf("DRAMTMG8 reset value: 0x%x\n",
>>> readl(&mctl_ctl->dramtmg[8]));
>>> + /* DRAMTMG8 reset value: 0x44 */
>>> +#endif
>>> + writel((MCTL_DIV32(tXSDLL) << 0), &mctl_ctl->dramtmg[8]);
>>> +
>>> + writel((MCTL_DIV32(tREFI) << 16) | (MCTL_DIV2(tRFC) << 0),
>>> + &mctl_ctl->rfshtmg);
>>> +
>>> + if (para->dram_type == DRAM_TYPE_DDR3) {
>>> + writel((2 << 24) | ((MCTL_DIV2(CL) - 2) << 16) |
>>> + (1 << 8) | ((MCTL_DIV2(CWL) - 2) << 0),
>>> + &mctl_ctl->dfitmg[0]);
>>> + } else {
>>> + /* TODO */
>>> + }
>>> +
>>> + /* TODO: handle the case of the write latency domain going to 0
>>> ... */
>>> +
>>> + /*
>>> + * Disable dfi_init_complete_en (the triggering of the SDRAM
>>> + * initialisation when the PHY initialisation completes).
>>> + */
>>> + clrbits_le32(&mctl_ctl->dfimisc,
>>> MCTL_DFIMISC_DFI_INIT_COMPLETE_EN);
>>> + /* Disable the automatic generation of DLL calibration requests
>>> */
>>> + setbits_le32(&mctl_ctl->dfiupd[0],
>>> MCTL_DFIUPD0_DIS_AUTO_CTRLUPD);
>>> +
>>> + /* A80-Q7: 2T, 1 rank, DDR3, full-32bit-DQ */
>>> + /* TODO: make 2T and BUSWIDTH configurable */
>>> + writel(MCTL_MSTR_DEVICETYPE(para->dram_type) |
>>> + MCTL_MSTR_BURSTLENGTH(para->dram_type) |
>>> + MCTL_MSTR_ACTIVERANKS(para->rank) |
>>> + MCTL_MSTR_2TMODE | MCTL_MSTR_BUSWIDTH32,
>>> + &mctl_ctl->mstr);
>>> +
>>> + if (para->dram_type == DRAM_TYPE_DDR3) {
>>> + writel(MCTL_ZQCTRL0_TZQCL(MCTL_DIV2(tZQoper)) |
>>> + (MCTL_DIV2(tZQCS)), &mctl_ctl->zqctrl[0]);
>>> + /*
>>> + * TODO: is the following really necessary as the bottom
>>> + * half should already be 0x100 and the upper half should
>>> + * be ignored for a DDR3 device???
>>> + */
>>> + writel(MCTL_ZQCTRL1_TZQSI_x1024(0x100),
>>> + &mctl_ctl->zqctrl[1]);
>>> + } else {
>>> + writel(MCTL_ZQCTRL0_TZQCL(0x200) |
>>> MCTL_ZQCTRL0_TZQCS(0x40),
>>> + &mctl_ctl->zqctrl[0]);
>>> + writel(MCTL_ZQCTRL1_TZQRESET(0x28) |
>>> + MCTL_ZQCTRL1_TZQSI_x1024(0x100),
>>> + &mctl_ctl->zqctrl[1]);
>>> + }
>>> +
>>> + /* Assert dfi_init_complete signal */
>>> + setbits_le32(&mctl_ctl->dfimisc,
>>> MCTL_DFIMISC_DFI_INIT_COMPLETE_EN);
>>> + /* Disable auto-refresh */
>>> + setbits_le32(&mctl_ctl->rfshctl3,
>>> MCTL_RFSHCTL3_DIS_AUTO_REFRESH);
>>> +
>>> + /* PHY initialisation */
>>> +
>>> + /* TODO: make 2T and 8-bank mode configurable */
>>> + writel(MCTL_PHY_DCR_BYTEMASK | MCTL_PHY_DCR_2TMODE |
>>> + MCTL_PHY_DCR_DDR8BNK | MCTL_PHY_DRAMMODE_DDR3,
>>> + &mctl_phy->dcr);
>>> +
>>> + /* For LPDDR2 or LPDDR3, set DQSGX to 0 before training. */
>>> + if (para->dram_type != DRAM_TYPE_DDR3)
>>> + clrbits_le32(&mctl_phy->dsgcr, (3 << 6));
>>> +
>>> + writel(mr[0], &mctl_phy->mr0);
>>> + writel(mr[1], &mctl_phy->mr1);
>>> + writel(mr[2], &mctl_phy->mr2);
>>> + writel(mr[3], &mctl_phy->mr3);
>>> +
>>> + /*
>>> + * The DFI PHY is running at full rate. We thus use the actual
>>> + * timings in clock cycles here.
>>> + */
>>> + writel((tRC << 26) | (tRRD << 22) | (tRAS << 16) |
>>> + (tRCD << 12) | (tRP << 8) | (tWTR << 4) | (tRTP << 0),
>>> + &mctl_phy->dtpr[0]);
>>> + writel((tMRD << 0) | ((tMOD - 12) << 2) | (tFAW << 5) |
>>> + (tRFC << 11) | (tWLMRD << 20) | (tWLO << 26),
>>> + &mctl_phy->dtpr[1]);
>>> + writel((tXS << 0) | (MAX(tXP, tXPDLL) << 10) |
>>> + (tCKE << 15) | (tDLLK << 19) |
>>> + (MCTL_PHY_TRTODT << 29) | (MCTL_PHY_TRTW << 30) |
>>> + (((tCCD - 4) & 0x1) << 31),
>>> + &mctl_phy->dtpr[2]);
>>> +
>>> + /* tDQSCK and tDQSCKmax are used LPDDR2/LPDDR3 */
>>> +#if 0
>>> + writel((tDQSCK << 0) | (tDQSCKMAX << 3), &mctl_phy->dtpr[3]);
>>> +#endif
>>> +
>>> + /*
>>> + * We use the same values used by Allwinner's Boot0 for the PTR
>>> + * (PHY timing register) configuration that is tied to the PHY
>>> + * implementation.
>>> + */
>>> + writel(0x42C21590, &mctl_phy->ptr[0]);
>>> + writel(0xD05612C0, &mctl_phy->ptr[1]);
>>> + if (para->dram_type == DRAM_TYPE_DDR3) {
>>> + const unsigned int tdinit0 = 500 * CONFIG_DRAM_CLK; /*
>>> 500us */
>>> + const unsigned int tdinit1 = (360 * CONFIG_DRAM_CLK +
>>> 999) /
>>> + 1000; /* 360ns */
>>> + const unsigned int tdinit2 = 200 * CONFIG_DRAM_CLK; /*
>>> 200us */
>>> + const unsigned int tdinit3 = CONFIG_DRAM_CLK; /* 1us */
>>> +
>>> + writel((tdinit1 << 20) | tdinit0, &mctl_phy->ptr[3]);
>>> + writel((tdinit3 << 18) | tdinit2, &mctl_phy->ptr[4]);
>>> + } else {
>>> + /* LPDDR2 or LPDDR3 */
>>> + const unsigned int tdinit0 = (100 * CONFIG_DRAM_CLK +
>>> 999) /
>>> + 1000; /* 100ns */
>>> + const unsigned int tdinit1 = 200 * CONFIG_DRAM_CLK; /*
>>> 200us */
>>> + const unsigned int tdinit2 = 22 * CONFIG_DRAM_CLK; /*
>>> 11us */
>>> + const unsigned int tdinit3 = 2 * CONFIG_DRAM_CLK; /* 2us
>>> */
>>> +
>>> + writel((tdinit1 << 20) | tdinit0, &mctl_phy->ptr[3]);
>>> + writel((tdinit3 << 18) | tdinit2, &mctl_phy->ptr[4]);
>>> + }
>>> +
>>> +#if 1 /* TEST ME */
>>> + writel(0x00203131, &mctl_phy->acmdlr);
>>> +#endif
>>> +
>>> + /* TODO: can we enable this for 2 ranks, even when we don't know
>>> yet */
>>> + writel(MCTL_DTCR_DEFAULT | MCTL_DTCR_RANKEN(para->rank),
>>> + &mctl_phy->dtcr);
>>> +
>>> + /* TODO: half width */
>>> + debug("DX2GCR0 reset: 0x%x\n", readl(&mctl_phy->dx[2].gcr[0]));
>>> + writel(0x7C000285, &mctl_phy->dx[2].gcr[0]);
>>> + writel(0x7C000285, &mctl_phy->dx[3].gcr[0]);
>>> +
>>> + clrsetbits_le32(&mctl_phy->zq[0].pr, 0xff, (CONFIG_DRAM_ZQ >> 0)
>>> & 0xff); /* CK/CA */
>>> + clrsetbits_le32(&mctl_phy->zq[1].pr, 0xff, (CONFIG_DRAM_ZQ >> 8)
>>> & 0xff); /* DX0/DX1 */
>>> + clrsetbits_le32(&mctl_phy->zq[2].pr, 0xff, (CONFIG_DRAM_ZQ >> 16)
>>> & 0xff); /* DX2/DX3 */
>>> +
>>> + /* TODO: make configurable & implement non-ODT path */
>>> + if (1) {
>>> + int lane;
>>> + for (lane = 0; lane < 4; ++lane) {
>>> + clrbits_le32(&mctl_phy->dx[lane].gcr[2], 0xffff);
>>> + clrbits_le32(&mctl_phy->dx[lane].gcr[3],
>>> (0x3<<12) | (0x3<<4));
>>> + }
>>> + } else {
>>> + /* TODO: check */
>>> + int lane;
>>> + for (lane = 0; lane < 4; ++lane) {
>>> + clrsetbits_le32(&mctl_phy->dx[lane].gcr[2],
>>> 0xffff, 0xaaaa);
>>> + if (para->dram_type == DRAM_TYPE_DDR3)
>>> + setbits_le32(&mctl_phy->dx[lane].gcr[3],
>>> (0x3<<12) | (0x3<<4));
>>> + else
>>> + setbits_le32(&mctl_phy->dx[lane].gcr[3],
>>> 0x00000012);
>>> + }
>>> + }
>>> +
>>> + writel(0x04058D02, &mctl_phy->zq[0].cr); /* CK/CA */
>>> + writel(0x04058D02, &mctl_phy->zq[1].cr); /* DX0/DX1 */
>>> + writel(0x04058D02, &mctl_phy->zq[2].cr); /* DX2/DX3 */
>>> +
>>> + /* Disable auto-refresh prior to data training */
>>> + setbits_le32(&mctl_ctl->rfshctl3,
>>> MCTL_RFSHCTL3_DIS_AUTO_REFRESH);
>>> +
>>> + setbits_le32(&mctl_phy->dsgcr, 0xf << 24); /* unclear what this
>>> is... */
>>> + /* TODO: IODDRM (IO DDR-MODE) for DDR3L */
>>> + clrsetbits_le32(&mctl_phy->pgcr[1],
>>> + MCTL_PGCR1_ZCKSEL_MASK,
>>> + MCTL_PGCR1_IODDRM_DDR3 | MCTL_PGCR1_INHVT_EN);
>>> +
>>> + setbits_le32(&mctl_phy->pllcr, 0x3 << 19); /* PLL frequency
>>> select */
>>> + /* TODO: single-channel PLL mode??? missing */
>>> + setbits_le32(&mctl_phy->pllcr,
>>> + MCTL_PLLGCR_PLL_BYPASS | MCTL_PLLGCR_PLL_POWERDOWN);
>>> +#if 0
>>> + setbits_le32(&mctl_phy->pir, MCTL_PIR_PLL_BYPASS); /* included
>>> below */
>>> +#endif
>>> +
>>> + /* Disable VT compensation */
>>> + clrbits_le32(&mctl_phy->pgcr[0], 0x3f);
>>> +
>>> + /* TODO: "other" PLL mode ... 0x20000 seems to be the PLL Bypass
>>> */
>>> + if (para->dram_type == DRAM_TYPE_DDR3)
>>> + clrsetbits_le32(&mctl_phy->pir, MCTL_PIR_MASK, 0x20df3);
>>> + else
>>> + clrsetbits_le32(&mctl_phy->pir, MCTL_PIR_MASK, 0x2c573);
>>> +
>>> + sdelay(10000); /* XXX necessary? */
>>> +
>>> + /* Wait for the INIT bit to clear itself... */
>>> + while ((readl(&mctl_phy->pir) & MCTL_PIR_INIT) != MCTL_PIR_INIT)
>>> {
>>> + /* not done yet -- keep spinning */
>>> + debug("MCTL_PIR_INIT not set\n");
>>> + sdelay(1000);
>>> + /* TODO: implement timeout */
>>> + }
>>> +
>>> + /* TODO: not used --- there's a "2rank debug" section here */
>>> +
>>> +#if 0
>>> + /* LPDDR2 and LPDDR3 */
>>> + if ((para->dram_type) == 6 || (para->dram_type) == 7) {
>>> + reg_val = mctl_read_w(P0_DSGCR + ch_offset);
>>> + reg_val &= (~(0x3<<6)); /* set DQSGX to 1 */
>>> + reg_val |= (0x1<<6); /* dqs gate extend */
>>> + mctl_write_w(P0_DSGCR + ch_offset, reg_val);
>>> + dram_dbg("DQS Gate Extend Enable!\n", ch_index);
>>> + }
>>> +
>>> + /* Disable ZCAL after initial--for nand dma debug--20140330 by
>>> YSZ */
>>> + if (para->dram_tpr13 & (0x1<<31)) {
>>> + reg_val = mctl_read_w(P0_ZQ0CR + ch_offset);
>>> + reg_val |= (0x7<<11);
>>> + mctl_write_w(P0_ZQ0CR + ch_offset, reg_val);
>>> + }
>>> +#endif
>>> + /* TODO: more 2-rank support (setting the "dqs gate delay to
>>> average between 2 rank") */
>>> +
>>> + /* check if any errors are set */
>>> + if (readl(&mctl_phy->pgsr[0]) & MCTL_PGSR0_ERRORS) {
>>> + debug("Channel %d unavailable!\n", ch_index);
>>> + return 0;
>>> + } else{
>>> + /* initial OK */
>>> + debug("Channel %d OK!\n", ch_index);
>>> + /* return 1; */
>>> + }
>>> +
>>> + while ((readl(&mctl_ctl->stat) & 0x1) != 0x1) {
>>> + debug("Waiting for INIT to be done (controller to come up
>>> into 'normal operating' mode\n");
>>> + sdelay(100000);
>>> + /* init not done */
>>> + /* TODO: implement time-out */
>>> + }
>>> + debug("done\n");
>>> +
>>> + /* "DDR is controller by contoller" */
>>> + clrbits_le32(&mctl_phy->pgcr[3], (1 << 25));
>>> +#if 1
>>> + /* TODO: is the following necessary? */
>>> + debug("DFIMISC before writing 0: 0x%x\n",
>>> readl(&mctl_ctl->dfimisc));
>>> + writel(0, &mctl_ctl->dfimisc);
>>> +#endif
>>> +
>>> + /* Enable auto-refresh */
>>> + clrbits_le32(&mctl_ctl->rfshctl3,
>>> MCTL_RFSHCTL3_DIS_AUTO_REFRESH);
>>> +
>>> + debug("channel_init complete\n");
>>> + return 1;
>>> +}
>>> +
>>> +
>>> +signed int DRAMC_get_dram_size(void)
>>> +{
>>> + struct sunxi_mctl_com_reg * const mctl_com =
>>> + (struct sunxi_mctl_com_reg *)SUNXI_DRAM_COM_BASE;
>>> +
>>> + unsigned int reg_val;
>>> + unsigned int dram_size;
>>> + unsigned int temp;
>>> +
>>> + reg_val = readl(&mctl_com->cr);
>>> +
>>> + temp = (reg_val >> 8) & 0xf; /* page size code */
>>> + dram_size = (temp - 6); /* (1 << dram_size) * 512Bytes */
>>> +
>>> + temp = (reg_val >> 4) & 0xf; /* row width code */
>>> + dram_size += (temp + 1); /* (1 << dram_size) * 512Bytes */
>>> +
>>> + temp = (reg_val >> 2) & 0x3; /* bank number code */
>>> + dram_size += (temp + 2); /* (1 << dram_size) * 512Bytes */
>>> +
>>> + temp = reg_val & 0x3; /* rank number code */
>>> + dram_size += temp; /* (1 << dram_size) * 512Bytes */
>>> +
>>> + temp = (reg_val >> 19) & 0x1; /* channel number code */
>>> + dram_size += temp; /* (1 << dram_size) * 512Bytes */
>>> +
>>> + dram_size = dram_size - 11; /* (1 << dram_size) MBytes */
>>> +
>>> + return 1 << dram_size;
>>> +}
>>> +
>>> +unsigned long sunxi_dram_init(void)
>>> +{
>>> + struct sunxi_mctl_com_reg * const mctl_com =
>>> + (struct sunxi_mctl_com_reg *)SUNXI_DRAM_COM_BASE;
>>> +
>>> + struct dram_sun9i_cl_cwl_timing cl_cwl[] = {
>>> + { .CL = 5, .CWL = 5, .tCKmin = 3000, .tCKmax = 3300 },
>>> + { .CL = 6, .CWL = 5, .tCKmin = 2500, .tCKmax = 3300 },
>>> + { .CL = 8, .CWL = 6, .tCKmin = 1875, .tCKmax = 2500 },
>>> + { .CL = 10, .CWL = 7, .tCKmin = 1500, .tCKmax = 1875 },
>>> + { .CL = 11, .CWL = 8, .tCKmin = 1250, .tCKmax = 1500 }
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