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u-boot/arch/arm/mach-imx/mx7/ddr.c

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SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-06 21:58:06 +00:00
// SPDX-License-Identifier: GPL-2.0+
imx: mx7: DDR controller configuration for the i.MX7 architecture The configuration files imximage.cfg are used for the DDR controller configuration. Add DDR configuration function to replace the DDR controller configuration in the imximage.cfg file. The function can be used for DDR size detection. Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
2017-09-24 06:00:23 +00:00
/*
* DDR controller configuration for the i.MX7 architecture
*
* (C) Copyright 2017 CompuLab, Ltd. http://www.compulab.com
*
* Author: Uri Mashiach <uri.mashiach@compulab.co.il>
*/
#include <linux/types.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/mx7-ddr.h>
#include <common.h>
ARM: imx: ddr: Add missing PHY reset The iMX7D RM 9.2.4.9.3 Power removal flow Table 9-11. Re-enabling power explicitly says both the DDR controller and the PHY must be reset in the correct sequence. Currently the code only resets the controller. This leads to a misbehavior where the system brings the DRAM up after reboot, but the DRAM is unstable. Add the missing reset. The easiest way to trigger this is by triggering WDT without having the WDT assert WDOG_B signal, i.e. mw.w 0x30280000 0x25 . Signed-off-by: Marek Vasut <marex@denx.de> Cc: Fabio Estevam <festevam@gmail.com> Cc: NXP i.MX U-Boot Team <uboot-imx@nxp.com> Cc: Peng Fan <peng.fan@nxp.com> Cc: Stefano Babic <sbabic@denx.de>
2020-05-30 00:14:48 +00:00
#include <linux/delay.h>
imx: mx7: DDR controller configuration for the i.MX7 architecture The configuration files imximage.cfg are used for the DDR controller configuration. Add DDR configuration function to replace the DDR controller configuration in the imximage.cfg file. The function can be used for DDR size detection. Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
2017-09-24 06:00:23 +00:00
/*
* Routine: mx7_dram_cfg
* Description: DDR controller configuration
*
* @ddrc_regs_val: DDRC registers value
* @ddrc_mp_val: DDRC_MP registers value
* @ddr_phy_regs_val: DDR_PHY registers value
* @calib_param: calibration parameters
*
*/
void mx7_dram_cfg(struct ddrc *ddrc_regs_val, struct ddrc_mp *ddrc_mp_val,
struct ddr_phy *ddr_phy_regs_val,
struct mx7_calibration *calib_param)
{
struct src *const src_regs = (struct src *)SRC_BASE_ADDR;
struct ddrc *const ddrc_regs = (struct ddrc *)DDRC_IPS_BASE_ADDR;
struct ddrc_mp *const ddrc_mp_reg = (struct ddrc_mp *)DDRC_MP_BASE_ADDR;
struct ddr_phy *const ddr_phy_regs =
(struct ddr_phy *)DDRPHY_IPS_BASE_ADDR;
struct iomuxc_gpr_base_regs *const iomuxc_gpr_regs =
(struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;
int i;
ARM: imx: ddr: Add missing PHY reset The iMX7D RM 9.2.4.9.3 Power removal flow Table 9-11. Re-enabling power explicitly says both the DDR controller and the PHY must be reset in the correct sequence. Currently the code only resets the controller. This leads to a misbehavior where the system brings the DRAM up after reboot, but the DRAM is unstable. Add the missing reset. The easiest way to trigger this is by triggering WDT without having the WDT assert WDOG_B signal, i.e. mw.w 0x30280000 0x25 . Signed-off-by: Marek Vasut <marex@denx.de> Cc: Fabio Estevam <festevam@gmail.com> Cc: NXP i.MX U-Boot Team <uboot-imx@nxp.com> Cc: Peng Fan <peng.fan@nxp.com> Cc: Stefano Babic <sbabic@denx.de>
2020-05-30 00:14:48 +00:00
/*
* iMX7D RM 9.2.4.9.3 Power removal flow Table 9-11. Re-enabling power
* row 2 says "Reset controller / PHY by driving core_ddrc_rst = 0 ,
* aresetn_n = 0, presetn = 0. That means reset everything.
*/
writel(SRC_DDRC_RCR_DDRC_CORE_RST_MASK | SRC_DDRC_RCR_DDRC_PRST_MASK,
&src_regs->ddrc_rcr);
/*
* iMX7D RM 6.2.7.26 SRC_DDRC_RCR says wait 30 cycles (of unknown).
* If we assume this is 30 cycles at 100 MHz (about the rate of a
* DRAM bus), that's 300 nS, so waiting 10 uS is more then plenty.
*/
udelay(10);
/* De-assert DDR Controller 'preset' and DDR PHY reset */
clrbits_le32(&src_regs->ddrc_rcr, SRC_DDRC_RCR_DDRC_PRST_MASK);
imx: mx7: DDR controller configuration for the i.MX7 architecture The configuration files imximage.cfg are used for the DDR controller configuration. Add DDR configuration function to replace the DDR controller configuration in the imximage.cfg file. The function can be used for DDR size detection. Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
2017-09-24 06:00:23 +00:00
/* DDR controller configuration */
writel(ddrc_regs_val->mstr, &ddrc_regs->mstr);
writel(ddrc_regs_val->rfshtmg, &ddrc_regs->rfshtmg);
writel(ddrc_mp_val->pctrl_0, &ddrc_mp_reg->pctrl_0);
writel(ddrc_regs_val->init1, &ddrc_regs->init1);
writel(ddrc_regs_val->init0, &ddrc_regs->init0);
writel(ddrc_regs_val->init3, &ddrc_regs->init3);
writel(ddrc_regs_val->init4, &ddrc_regs->init4);
writel(ddrc_regs_val->init5, &ddrc_regs->init5);
writel(ddrc_regs_val->rankctl, &ddrc_regs->rankctl);
writel(ddrc_regs_val->dramtmg0, &ddrc_regs->dramtmg0);
writel(ddrc_regs_val->dramtmg1, &ddrc_regs->dramtmg1);
writel(ddrc_regs_val->dramtmg2, &ddrc_regs->dramtmg2);
writel(ddrc_regs_val->dramtmg3, &ddrc_regs->dramtmg3);
writel(ddrc_regs_val->dramtmg4, &ddrc_regs->dramtmg4);
writel(ddrc_regs_val->dramtmg5, &ddrc_regs->dramtmg5);
writel(ddrc_regs_val->dramtmg8, &ddrc_regs->dramtmg8);
writel(ddrc_regs_val->zqctl0, &ddrc_regs->zqctl0);
ARM: imx: ddr: Fill in missing DDRC ZQCTLx on i.MX7 The iMX7 defines further DDRC ZQCTLx registers, however those were thus far missing from the list of registers and not programmed. On systems with LPDDR2 or DDR3, those registers must be programmed with correct values, otherwise the DRAM may not work. However, existing systems which worked without programming these registers before are now setting those registers to 0, which is the default value, so no functional change there. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Fabio Estevam <festevam@gmail.com> Cc: NXP i.MX U-Boot Team <uboot-imx@nxp.com> Cc: Peng Fan <peng.fan@nxp.com> Cc: Stefano Babic <sbabic@denx.de>
2020-05-21 23:12:39 +00:00
writel(ddrc_regs_val->zqctl1, &ddrc_regs->zqctl1);
imx: mx7: DDR controller configuration for the i.MX7 architecture The configuration files imximage.cfg are used for the DDR controller configuration. Add DDR configuration function to replace the DDR controller configuration in the imximage.cfg file. The function can be used for DDR size detection. Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
2017-09-24 06:00:23 +00:00
writel(ddrc_regs_val->dfitmg0, &ddrc_regs->dfitmg0);
writel(ddrc_regs_val->dfitmg1, &ddrc_regs->dfitmg1);
writel(ddrc_regs_val->dfiupd0, &ddrc_regs->dfiupd0);
writel(ddrc_regs_val->dfiupd1, &ddrc_regs->dfiupd1);
writel(ddrc_regs_val->dfiupd2, &ddrc_regs->dfiupd2);
writel(ddrc_regs_val->addrmap0, &ddrc_regs->addrmap0);
writel(ddrc_regs_val->addrmap1, &ddrc_regs->addrmap1);
writel(ddrc_regs_val->addrmap4, &ddrc_regs->addrmap4);
writel(ddrc_regs_val->addrmap5, &ddrc_regs->addrmap5);
writel(ddrc_regs_val->addrmap6, &ddrc_regs->addrmap6);
writel(ddrc_regs_val->odtcfg, &ddrc_regs->odtcfg);
writel(ddrc_regs_val->odtmap, &ddrc_regs->odtmap);
ARM: imx: ddr: Add missing PHY reset The iMX7D RM 9.2.4.9.3 Power removal flow Table 9-11. Re-enabling power explicitly says both the DDR controller and the PHY must be reset in the correct sequence. Currently the code only resets the controller. This leads to a misbehavior where the system brings the DRAM up after reboot, but the DRAM is unstable. Add the missing reset. The easiest way to trigger this is by triggering WDT without having the WDT assert WDOG_B signal, i.e. mw.w 0x30280000 0x25 . Signed-off-by: Marek Vasut <marex@denx.de> Cc: Fabio Estevam <festevam@gmail.com> Cc: NXP i.MX U-Boot Team <uboot-imx@nxp.com> Cc: Peng Fan <peng.fan@nxp.com> Cc: Stefano Babic <sbabic@denx.de>
2020-05-30 00:14:48 +00:00
/* De-assert DDR Controller 'core_ddrc_rstn' and 'aresetn' */
imx: mx7: DDR controller configuration for the i.MX7 architecture The configuration files imximage.cfg are used for the DDR controller configuration. Add DDR configuration function to replace the DDR controller configuration in the imximage.cfg file. The function can be used for DDR size detection. Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
2017-09-24 06:00:23 +00:00
clrbits_le32(&src_regs->ddrc_rcr, SRC_DDRC_RCR_DDRC_CORE_RST_MASK);
/* PHY configuration */
writel(ddr_phy_regs_val->phy_con0, &ddr_phy_regs->phy_con0);
writel(ddr_phy_regs_val->phy_con1, &ddr_phy_regs->phy_con1);
writel(ddr_phy_regs_val->phy_con4, &ddr_phy_regs->phy_con4);
writel(ddr_phy_regs_val->mdll_con0, &ddr_phy_regs->mdll_con0);
writel(ddr_phy_regs_val->drvds_con0, &ddr_phy_regs->drvds_con0);
writel(ddr_phy_regs_val->offset_wr_con0, &ddr_phy_regs->offset_wr_con0);
writel(ddr_phy_regs_val->offset_rd_con0, &ddr_phy_regs->offset_rd_con0);
writel(ddr_phy_regs_val->cmd_sdll_con0 |
DDR_PHY_CMD_SDLL_CON0_CTRL_RESYNC_MASK,
&ddr_phy_regs->cmd_sdll_con0);
writel(ddr_phy_regs_val->cmd_sdll_con0 &
~DDR_PHY_CMD_SDLL_CON0_CTRL_RESYNC_MASK,
&ddr_phy_regs->cmd_sdll_con0);
writel(ddr_phy_regs_val->offset_lp_con0, &ddr_phy_regs->offset_lp_con0);
ARM: imx: ddr: Add deskew register programming Fill is code for programming the DDR_PHY_CMD_DESKEW_CONx registers, which are optional, but can be used to fill in the byte lane delays. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Fabio Estevam <festevam@gmail.com> Cc: NXP i.MX U-Boot Team <uboot-imx@nxp.com> Cc: Peng Fan <peng.fan@nxp.com> Cc: Stefano Babic <sbabic@denx.de>
2020-08-05 13:30:43 +00:00
writel(ddr_phy_regs_val->cmd_deskew_con0,
&ddr_phy_regs->cmd_deskew_con0);
writel(ddr_phy_regs_val->cmd_deskew_con1,
&ddr_phy_regs->cmd_deskew_con1);
writel(ddr_phy_regs_val->cmd_deskew_con2,
&ddr_phy_regs->cmd_deskew_con2);
writel(ddr_phy_regs_val->cmd_deskew_con3,
&ddr_phy_regs->cmd_deskew_con3);
writel(ddr_phy_regs_val->cmd_lvl_con0, &ddr_phy_regs->cmd_lvl_con0);
imx: mx7: DDR controller configuration for the i.MX7 architecture The configuration files imximage.cfg are used for the DDR controller configuration. Add DDR configuration function to replace the DDR controller configuration in the imximage.cfg file. The function can be used for DDR size detection. Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
2017-09-24 06:00:23 +00:00
/* calibration */
for (i = 0; i < calib_param->num_val; i++)
writel(calib_param->values[i], &ddr_phy_regs->zq_con0);
/* Wake_up DDR PHY */
HW_CCM_CCGR_WR(CCGR_IDX_DDR, CCM_CLK_ON_N_N);
writel(IOMUXC_GPR_GPR8_ddr_phy_ctrl_wake_up(0xf) |
IOMUXC_GPR_GPR8_ddr_phy_dfi_init_start_MASK,
&iomuxc_gpr_regs->gpr[8]);
HW_CCM_CCGR_WR(CCGR_IDX_DDR, CCM_CLK_ON_R_W);
}
/*
* Routine: imx_ddr_size
* Description: extract the current DRAM size from the DDRC registers
*
* @return: DRAM size
*/
unsigned int imx_ddr_size(void)
{
struct ddrc *const ddrc_regs = (struct ddrc *)DDRC_IPS_BASE_ADDR;
u32 reg_val, field_val;
int bits = 0;/* Number of address bits */
/* Count data bus width bits */
reg_val = readl(&ddrc_regs->mstr);
field_val = (reg_val & MSTR_DATA_BUS_WIDTH_MASK) >> MSTR_DATA_BUS_WIDTH_SHIFT;
bits += 2 - field_val;
/* Count rank address bits */
field_val = (reg_val & MSTR_DATA_ACTIVE_RANKS_MASK) >> MSTR_DATA_ACTIVE_RANKS_SHIFT;
if (field_val > 1)
bits += field_val - 1;
/* Count column address bits */
bits += 2;/* Column address 0 and 1 are fixed mapped */
reg_val = readl(&ddrc_regs->addrmap2);
field_val = (reg_val & ADDRMAP2_COL_B2_MASK) >> ADDRMAP2_COL_B2_SHIFT;
if (field_val <= 7)
bits++;
field_val = (reg_val & ADDRMAP2_COL_B3_MASK) >> ADDRMAP2_COL_B3_SHIFT;
if (field_val <= 7)
bits++;
field_val = (reg_val & ADDRMAP2_COL_B4_MASK) >> ADDRMAP2_COL_B4_SHIFT;
if (field_val <= 7)
bits++;
field_val = (reg_val & ADDRMAP2_COL_B5_MASK) >> ADDRMAP2_COL_B5_SHIFT;
if (field_val <= 7)
bits++;
reg_val = readl(&ddrc_regs->addrmap3);
field_val = (reg_val & ADDRMAP3_COL_B6_MASK) >> ADDRMAP3_COL_B6_SHIFT;
if (field_val <= 7)
bits++;
field_val = (reg_val & ADDRMAP3_COL_B7_MASK) >> ADDRMAP3_COL_B7_SHIFT;
if (field_val <= 7)
bits++;
field_val = (reg_val & ADDRMAP3_COL_B8_MASK) >> ADDRMAP3_COL_B8_SHIFT;
if (field_val <= 7)
bits++;
field_val = (reg_val & ADDRMAP3_COL_B9_MASK) >> ADDRMAP3_COL_B9_SHIFT;
if (field_val <= 7)
bits++;
reg_val = readl(&ddrc_regs->addrmap4);
field_val = (reg_val & ADDRMAP4_COL_B10_MASK) >> ADDRMAP4_COL_B10_SHIFT;
if (field_val <= 7)
bits++;
field_val = (reg_val & ADDRMAP4_COL_B11_MASK) >> ADDRMAP4_COL_B11_SHIFT;
if (field_val <= 7)
bits++;
/* Count row address bits */
reg_val = readl(&ddrc_regs->addrmap5);
field_val = (reg_val & ADDRMAP5_ROW_B0_MASK) >> ADDRMAP5_ROW_B0_SHIFT;
if (field_val <= 11)
bits++;
field_val = (reg_val & ADDRMAP5_ROW_B1_MASK) >> ADDRMAP5_ROW_B1_SHIFT;
if (field_val <= 11)
bits++;
field_val = (reg_val & ADDRMAP5_ROW_B2_10_MASK) >> ADDRMAP5_ROW_B2_10_SHIFT;
if (field_val <= 11)
bits += 9;
field_val = (reg_val & ADDRMAP5_ROW_B11_MASK) >> ADDRMAP5_ROW_B11_SHIFT;
if (field_val <= 11)
bits++;
reg_val = readl(&ddrc_regs->addrmap6);
field_val = (reg_val & ADDRMAP6_ROW_B12_MASK) >> ADDRMAP6_ROW_B12_SHIFT;
if (field_val <= 11)
bits++;
field_val = (reg_val & ADDRMAP6_ROW_B13_MASK) >> ADDRMAP6_ROW_B13_SHIFT;
if (field_val <= 11)
bits++;
field_val = (reg_val & ADDRMAP6_ROW_B14_MASK) >> ADDRMAP6_ROW_B14_SHIFT;
if (field_val <= 11)
bits++;
field_val = (reg_val & ADDRMAP6_ROW_B15_MASK) >> ADDRMAP6_ROW_B15_SHIFT;
if (field_val <= 11)
bits++;
/* Count bank bits */
reg_val = readl(&ddrc_regs->addrmap1);
field_val = (reg_val & ADDRMAP1_BANK_B0_MASK) >> ADDRMAP1_BANK_B0_SHIFT;
if (field_val <= 30)
bits++;
field_val = (reg_val & ADDRMAP1_BANK_B1_MASK) >> ADDRMAP1_BANK_B1_SHIFT;
if (field_val <= 30)
bits++;
field_val = (reg_val & ADDRMAP1_BANK_B2_MASK) >> ADDRMAP1_BANK_B2_SHIFT;
if (field_val <= 29)
bits++;
imx: mx7: fix potential overflow in imx_ddr_size() The imx_ddr_size() function may overflow as it is possible to kind of over provision the DDR controller. Fix this by capping it to 2 GB which is the maximum allowed size as per reference manual. Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
2018-09-19 11:01:55 +00:00
/* cap to max 2 GB */
if (bits > 31)
bits = 31;
imx: mx7: DDR controller configuration for the i.MX7 architecture The configuration files imximage.cfg are used for the DDR controller configuration. Add DDR configuration function to replace the DDR controller configuration in the imximage.cfg file. The function can be used for DDR size detection. Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
2017-09-24 06:00:23 +00:00
return 1 << bits;
}
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