diff options
Diffstat (limited to 'arch/mips/mach-ath79/qca956x/ddr.c')
| -rw-r--r-- | arch/mips/mach-ath79/qca956x/ddr.c | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/arch/mips/mach-ath79/qca956x/ddr.c b/arch/mips/mach-ath79/qca956x/ddr.c new file mode 100644 index 0000000000..fb2230430c --- /dev/null +++ b/arch/mips/mach-ath79/qca956x/ddr.c @@ -0,0 +1,308 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 Rosy Song <rosysong@rosinson.com> + * + * Based on QSDK + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/addrspace.h> +#include <asm/types.h> +#include <mach/ar71xx_regs.h> +#include <mach/ath79.h> + +#define DDR_FSM_WAIT_CTRL_VAL 0xa12 +#define DDR_CTL_CONFIG_SRAM_TSEL_LSB 30 +#define DDR_CTL_CONFIG_SRAM_TSEL_MASK 0xc0000000 +#define DDR_CTL_CONFIG_SRAM_TSEL_SET(x) \ + (((x) << DDR_CTL_CONFIG_SRAM_TSEL_LSB) & DDR_CTL_CONFIG_SRAM_TSEL_MASK) +#define DDR_CTL_CONFIG_GE0_SRAM_SYNC_LSB 20 +#define DDR_CTL_CONFIG_GE0_SRAM_SYNC_MASK 0x00100000 +#define DDR_CTL_CONFIG_GE0_SRAM_SYNC_SET(x) \ + (((x) << DDR_CTL_CONFIG_GE0_SRAM_SYNC_LSB) & DDR_CTL_CONFIG_GE0_SRAM_SYNC_MASK) +#define DDR_CTL_CONFIG_GE1_SRAM_SYNC_LSB 19 +#define DDR_CTL_CONFIG_GE1_SRAM_SYNC_MASK 0x00080000 +#define DDR_CTL_CONFIG_GE1_SRAM_SYNC_SET(x) \ + (((x) << DDR_CTL_CONFIG_GE1_SRAM_SYNC_LSB) & DDR_CTL_CONFIG_GE1_SRAM_SYNC_MASK) +#define DDR_CTL_CONFIG_USB_SRAM_SYNC_LSB 18 +#define DDR_CTL_CONFIG_USB_SRAM_SYNC_MASK 0x00040000 +#define DDR_CTL_CONFIG_USB_SRAM_SYNC_SET(x) \ + (((x) << DDR_CTL_CONFIG_USB_SRAM_SYNC_LSB) & DDR_CTL_CONFIG_USB_SRAM_SYNC_MASK) +#define DDR_CTL_CONFIG_PCIE_SRAM_SYNC_LSB 17 +#define DDR_CTL_CONFIG_PCIE_SRAM_SYNC_MASK 0x00020000 +#define DDR_CTL_CONFIG_PCIE_SRAM_SYNC_SET(x) \ + (((x) << DDR_CTL_CONFIG_PCIE_SRAM_SYNC_LSB) & DDR_CTL_CONFIG_PCIE_SRAM_SYNC_MASK) +#define DDR_CTL_CONFIG_WMAC_SRAM_SYNC_LSB 16 +#define DDR_CTL_CONFIG_WMAC_SRAM_SYNC_MASK 0x00010000 +#define DDR_CTL_CONFIG_WMAC_SRAM_SYNC_SET(x) \ + (((x) << DDR_CTL_CONFIG_WMAC_SRAM_SYNC_LSB) & DDR_CTL_CONFIG_WMAC_SRAM_SYNC_MASK) +#define DDR_CTL_CONFIG_MISC_SRC1_SRAM_SYNC_LSB 15 +#define DDR_CTL_CONFIG_MISC_SRC1_SRAM_SYNC_MASK 0x00008000 +#define DDR_CTL_CONFIG_MISC_SRC1_SRAM_SYNC_SET(x) \ + (((x) << DDR_CTL_CONFIG_MISC_SRC1_SRAM_SYNC_LSB) & DDR_CTL_CONFIG_MISC_SRC1_SRAM_SYNC_MASK) +#define DDR_CTL_CONFIG_MISC_SRC2_SRAM_SYNC_LSB 14 +#define DDR_CTL_CONFIG_MISC_SRC2_SRAM_SYNC_MASK 0x00004000 +#define DDR_CTL_CONFIG_MISC_SRC2_SRAM_SYNC_SET(x) \ + (((x) << DDR_CTL_CONFIG_MISC_SRC2_SRAM_SYNC_LSB) & DDR_CTL_CONFIG_MISC_SRC2_SRAM_SYNC_MASK) +#define DDR_CTL_CONFIG_PAD_DDR2_SEL_LSB 6 +#define DDR_CTL_CONFIG_PAD_DDR2_SEL_MASK 0x00000040 +#define DDR_CTL_CONFIG_PAD_DDR2_SEL_SET(x) \ + (((x) << DDR_CTL_CONFIG_PAD_DDR2_SEL_LSB) & DDR_CTL_CONFIG_PAD_DDR2_SEL_MASK) +#define DDR_CTL_CONFIG_CPU_DDR_SYNC_LSB 2 +#define DDR_CTL_CONFIG_CPU_DDR_SYNC_MASK 0x00000004 +#define DDR_CTL_CONFIG_CPU_DDR_SYNC_SET(x) \ + (((x) << DDR_CTL_CONFIG_CPU_DDR_SYNC_LSB) & DDR_CTL_CONFIG_CPU_DDR_SYNC_MASK) +#define DDR_CTL_CONFIG_HALF_WIDTH_LSB 1 +#define DDR_CTL_CONFIG_HALF_WIDTH_MASK 0x00000002 +#define DDR_CTL_CONFIG_HALF_WIDTH_SET(x) \ + (((x) << DDR_CTL_CONFIG_HALF_WIDTH_LSB) & DDR_CTL_CONFIG_HALF_WIDTH_MASK) +#define DDR_CONFIG_CAS_LATENCY_MSB_LSB 31 +#define DDR_CONFIG_CAS_LATENCY_MSB_MASK 0x80000000 +#define DDR_CONFIG_CAS_LATENCY_MSB_SET(x) \ + (((x) << DDR_CONFIG_CAS_LATENCY_MSB_LSB) & DDR_CONFIG_CAS_LATENCY_MSB_MASK) +#define DDR_CONFIG_OPEN_PAGE_LSB 30 +#define DDR_CONFIG_OPEN_PAGE_MASK 0x40000000 +#define DDR_CONFIG_OPEN_PAGE_SET(x) \ + (((x) << DDR_CONFIG_OPEN_PAGE_LSB) & DDR_CONFIG_OPEN_PAGE_MASK) +#define DDR_CONFIG_CAS_LATENCY_LSB 27 +#define DDR_CONFIG_CAS_LATENCY_MASK 0x38000000 +#define DDR_CONFIG_CAS_LATENCY_SET(x) \ + (((x) << DDR_CONFIG_CAS_LATENCY_LSB) & DDR_CONFIG_CAS_LATENCY_MASK) +#define DDR_CONFIG_TMRD_LSB 23 +#define DDR_CONFIG_TMRD_MASK 0x07800000 +#define DDR_CONFIG_TMRD_SET(x) \ + (((x) << DDR_CONFIG_TMRD_LSB) & DDR_CONFIG_TMRD_MASK) +#define DDR_CONFIG_TRFC_LSB 17 +#define DDR_CONFIG_TRFC_MASK 0x007e0000 +#define DDR_CONFIG_TRFC_SET(x) \ + (((x) << DDR_CONFIG_TRFC_LSB) & DDR_CONFIG_TRFC_MASK) +#define DDR_CONFIG_TRRD_LSB 13 +#define DDR_CONFIG_TRRD_MASK 0x0001e000 +#define DDR_CONFIG_TRRD_SET(x) \ + (((x) << DDR_CONFIG_TRRD_LSB) & DDR_CONFIG_TRRD_MASK) +#define DDR_CONFIG_TRP_LSB 9 +#define DDR_CONFIG_TRP_MASK 0x00001e00 +#define DDR_CONFIG_TRP_SET(x) \ + (((x) << DDR_CONFIG_TRP_LSB) & DDR_CONFIG_TRP_MASK) +#define DDR_CONFIG_TRCD_LSB 5 +#define DDR_CONFIG_TRCD_MASK 0x000001e0 +#define DDR_CONFIG_TRCD_SET(x) \ + (((x) << DDR_CONFIG_TRCD_LSB) & DDR_CONFIG_TRCD_MASK) +#define DDR_CONFIG_TRAS_LSB 0 +#define DDR_CONFIG_TRAS_MASK 0x0000001f +#define DDR_CONFIG_TRAS_SET(x) \ + (((x) << DDR_CONFIG_TRAS_LSB) & DDR_CONFIG_TRAS_MASK) +#define DDR_CONFIG2_HALF_WIDTH_LOW_LSB 31 +#define DDR_CONFIG2_HALF_WIDTH_LOW_MASK 0x80000000 +#define DDR_CONFIG2_HALF_WIDTH_LOW_SET(x) \ + (((x) << DDR_CONFIG2_HALF_WIDTH_LOW_LSB) & DDR_CONFIG2_HALF_WIDTH_LOW_MASK) +#define DDR_CONFIG2_SWAP_A26_A27_LSB 30 +#define DDR_CONFIG2_SWAP_A26_A27_MASK 0x40000000 +#define DDR_CONFIG2_SWAP_A26_A27_SET(x) \ + (((x) << DDR_CONFIG2_SWAP_A26_A27_LSB) & DDR_CONFIG2_SWAP_A26_A27_MASK) +#define DDR_CONFIG2_GATE_OPEN_LATENCY_LSB 26 +#define DDR_CONFIG2_GATE_OPEN_LATENCY_MASK 0x3c000000 +#define DDR_CONFIG2_GATE_OPEN_LATENCY_SET(x) \ + (((x) << DDR_CONFIG2_GATE_OPEN_LATENCY_LSB) & DDR_CONFIG2_GATE_OPEN_LATENCY_MASK) +#define DDR_CONFIG2_TWTR_LSB 21 +#define DDR_CONFIG2_TWTR_MASK 0x03e00000 +#define DDR_CONFIG2_TWTR_SET(x) \ + (((x) << DDR_CONFIG2_TWTR_LSB) & DDR_CONFIG2_TWTR_MASK) +#define DDR_CONFIG2_TRTP_LSB 17 +#define DDR_CONFIG2_TRTP_MASK 0x001e0000 +#define DDR_CONFIG2_TRTP_SET(x) \ + (((x) << DDR_CONFIG2_TRTP_LSB) & DDR_CONFIG2_TRTP_MASK) +#define DDR_CONFIG2_TRTW_LSB 12 +#define DDR_CONFIG2_TRTW_MASK 0x0001f000 +#define DDR_CONFIG2_TRTW_SET(x) \ + (((x) << DDR_CONFIG2_TRTW_LSB) & DDR_CONFIG2_TRTW_MASK) +#define DDR_CONFIG2_TWR_LSB 8 +#define DDR_CONFIG2_TWR_MASK 0x00000f00 +#define DDR_CONFIG2_TWR_SET(x) \ + (((x) << DDR_CONFIG2_TWR_LSB) & DDR_CONFIG2_TWR_MASK) +#define DDR_CONFIG2_CKE_LSB 7 +#define DDR_CONFIG2_CKE_MASK 0x00000080 +#define DDR_CONFIG2_CKE_SET(x) \ + (((x) << DDR_CONFIG2_CKE_LSB) & DDR_CONFIG2_CKE_MASK) +#define DDR_CONFIG2_CNTL_OE_EN_LSB 5 +#define DDR_CONFIG2_CNTL_OE_EN_MASK 0x00000020 +#define DDR_CONFIG2_CNTL_OE_EN_SET(x) \ + (((x) << DDR_CONFIG2_CNTL_OE_EN_LSB) & DDR_CONFIG2_CNTL_OE_EN_MASK) +#define DDR_CONFIG2_BURST_LENGTH_LSB 0 +#define DDR_CONFIG2_BURST_LENGTH_MASK 0x0000000f +#define DDR_CONFIG2_BURST_LENGTH_SET(x) \ + (((x) << DDR_CONFIG2_BURST_LENGTH_LSB) & DDR_CONFIG2_BURST_LENGTH_MASK) +#define RST_BOOTSTRAP_ADDRESS 0x180600b0 +#define PMU2_SWREGMSB_LSB 22 +#define PMU2_SWREGMSB_MASK 0xffc00000 +#define PMU2_SWREGMSB_SET(x) \ + (((x) << PMU2_SWREGMSB_LSB) & PMU2_SWREGMSB_MASK) +#define PMU2_PGM_LSB 21 +#define PMU2_PGM_MASK 0x00200000 +#define PMU2_PGM_SET(x) \ + (((x) << PMU2_PGM_LSB) & PMU2_PGM_MASK) + +#define CPU_DDR_SYNC_MODE DDR_CTL_CONFIG_CPU_DDR_SYNC_SET(0) + +/* +* DDR2 DDR1 +* 0x40c3 25MHz 0x4186 25Mhz +* 0x4138 40MHz 0x4270 40Mhz +*/ +#define CFG_DDR2_REFRESH_VAL 0x40c3 +#define CFG_DDR2_CONFIG_VAL DDR_CONFIG_CAS_LATENCY_MSB_SET(0x1) | \ + DDR_CONFIG_OPEN_PAGE_SET(0x1) | DDR_CONFIG_CAS_LATENCY_SET(0x4) | \ + DDR_CONFIG_TMRD_SET(0x6) | DDR_CONFIG_TRFC_SET(0x16) | \ + DDR_CONFIG_TRRD_SET(0x7) | DDR_CONFIG_TRP_SET(0xb) | \ + DDR_CONFIG_TRCD_SET(0xb) | DDR_CONFIG_TRAS_SET(0) +#define CFG_DDR2_CONFIG2_VAL DDR_CONFIG2_HALF_WIDTH_LOW_SET(0x1) | \ + DDR_CONFIG2_SWAP_A26_A27_SET(0x0) | DDR_CONFIG2_GATE_OPEN_LATENCY_SET(0xa) | \ + DDR_CONFIG2_TWTR_SET(0x16) | DDR_CONFIG2_TRTP_SET(0xa) | \ + DDR_CONFIG2_TRTW_SET(0xe) | DDR_CONFIG2_TWR_SET(0x2) | \ + DDR_CONFIG2_CKE_SET(0x1) | DDR_CONFIG2_CNTL_OE_EN_SET(0x1) | \ + DDR_CONFIG2_BURST_LENGTH_SET(0x8) + +#define CFG_DDR2_CONFIG3_VAL 0x0000000e +#define CFG_DDR2_EXT_MODE_VAL1 0x782 +#define CFG_DDR2_EXT_MODE_VAL2 0x402 +#define CFG_DDR2_MODE_VAL_INIT 0xb53 +#define CFG_DDR2_MODE_VAL 0xa53 +#define CFG_DDR2_TAP_VAL 0x10 +#define CFG_DDR2_EN_TWL_VAL 0x00001e91 +#define CFG_DDR2_RD_DATA_THIS_CYCLE_VAL_16 0xffff + +#define CFG_DDR_CTL_CONFIG DDR_CTL_CONFIG_SRAM_TSEL_SET(0x1) | \ + DDR_CTL_CONFIG_GE0_SRAM_SYNC_SET(0x1) | \ + DDR_CTL_CONFIG_GE1_SRAM_SYNC_SET(0x1) | \ + DDR_CTL_CONFIG_USB_SRAM_SYNC_SET(0x1) | \ + DDR_CTL_CONFIG_PCIE_SRAM_SYNC_SET(0x1) | \ + DDR_CTL_CONFIG_WMAC_SRAM_SYNC_SET(0x1) | \ + DDR_CTL_CONFIG_MISC_SRC1_SRAM_SYNC_SET(0x1) | \ + DDR_CTL_CONFIG_MISC_SRC2_SRAM_SYNC_SET(0x1) + +DECLARE_GLOBAL_DATA_PTR; + +void qca956x_ddr_init(void) +{ + u32 ddr_config, ddr_config2, ddr_config3, mod_val, \ + mod_val_init, cycle_val, tap_val, ctl_config; + void __iomem *ddr_regs = map_physmem(AR71XX_DDR_CTRL_BASE, AR71XX_DDR_CTRL_SIZE, + MAP_NOCACHE); + void __iomem *srif_regs = map_physmem(QCA956X_SRIF_BASE, QCA956X_SRIF_SIZE, + MAP_NOCACHE); + + ddr_config = CFG_DDR2_CONFIG_VAL; + ddr_config2 = CFG_DDR2_CONFIG2_VAL; + ddr_config3 = CFG_DDR2_CONFIG3_VAL; + mod_val_init = CFG_DDR2_MODE_VAL_INIT; + mod_val = CFG_DDR2_MODE_VAL; + tap_val = CFG_DDR2_TAP_VAL; + cycle_val = CFG_DDR2_RD_DATA_THIS_CYCLE_VAL_16; + ctl_config = CFG_DDR_CTL_CONFIG | DDR_CTL_CONFIG_PAD_DDR2_SEL_SET(0x1) | + DDR_CTL_CONFIG_HALF_WIDTH_SET(0x1) | CPU_DDR_SYNC_MODE; + + writel(0x10, ddr_regs + AR71XX_DDR_REG_CONTROL); + udelay(10); + + writel(0x20, ddr_regs + AR71XX_DDR_REG_CONTROL); + udelay(10); + + writel(ctl_config, ddr_regs + QCA956X_DDR_REG_CTL_CONF); + udelay(10); + + writel(cycle_val, ddr_regs + AR71XX_DDR_REG_RD_CYCLE); + udelay(100); + + writel(0x74444444, ddr_regs + QCA956X_DDR_REG_BURST); + udelay(100); + + writel(0x44444444, ddr_regs + QCA956X_DDR_REG_BURST2); + udelay(100); + + writel(DDR_FSM_WAIT_CTRL_VAL, ddr_regs + QCA956X_DDR_REG_FSM_WAIT_CTRL); + udelay(100); + + writel(0xfffff, ddr_regs + QCA956X_DDR_REG_TIMEOUT_MAX); + udelay(100); + + writel(ddr_config, ddr_regs + AR71XX_DDR_REG_CONFIG); + udelay(100); + + writel(ddr_config2, ddr_regs + AR71XX_DDR_REG_CONFIG2); + udelay(100); + + writel(ddr_config3, ddr_regs + QCA956X_DDR_REG_DDR3_CONFIG); + udelay(100); + + writel(CFG_DDR2_EN_TWL_VAL, ddr_regs + QCA956X_DDR_REG_DDR2_CONFIG); + udelay(100); + + writel(ddr_config2 | 0x80, ddr_regs + AR71XX_DDR_REG_CONFIG2); /* CKE Enable */ + udelay(100); + + writel(0x8, ddr_regs + AR71XX_DDR_REG_CONTROL); /* Precharge */ + udelay(10); + + writel(0, ddr_regs + QCA956X_DDR_REG_DDR2_EMR2); + writel(0x10, ddr_regs + AR71XX_DDR_REG_CONTROL); /* EMR2 */ + udelay(10); + + writel(0, ddr_regs + QCA956X_DDR_REG_DDR2_EMR3); + writel(0x20, ddr_regs + AR71XX_DDR_REG_CONTROL); /* EMR3 */ + udelay(10); + + /* EMR DLL enable, Reduced Driver Impedance control, Differential DQS disabled */ + writel(CFG_DDR2_EXT_MODE_VAL2, ddr_regs + AR71XX_DDR_REG_EMR); + udelay(100); + + writel(0x2, ddr_regs + AR71XX_DDR_REG_CONTROL); /* EMR write */ + udelay(10); + + writel(mod_val_init, ddr_regs + AR71XX_DDR_REG_MODE); + udelay(1000); + + writel(0x1, ddr_regs + AR71XX_DDR_REG_CONTROL); /* MR Write */ + udelay(10); + + writel(0x8, ddr_regs + AR71XX_DDR_REG_CONTROL); /* Precharge */ + udelay(10); + + writel(0x4, ddr_regs + AR71XX_DDR_REG_CONTROL); /* Auto Refresh */ + udelay(10); + + writel(0x4, ddr_regs + AR71XX_DDR_REG_CONTROL); /* Auto Refresh */ + udelay(10); + + /* Issue MRS to remove DLL out-of-reset */ + writel(mod_val, ddr_regs + AR71XX_DDR_REG_MODE); + udelay(100); + + writel(0x1, ddr_regs + AR71XX_DDR_REG_CONTROL); /* MR write */ + udelay(100); + + writel(CFG_DDR2_EXT_MODE_VAL1, ddr_regs + AR71XX_DDR_REG_EMR); + udelay(100); + + writel(0x2, ddr_regs + AR71XX_DDR_REG_CONTROL); /* EMR write */ + udelay(100); + + writel(CFG_DDR2_EXT_MODE_VAL2, ddr_regs + AR71XX_DDR_REG_EMR); + udelay(100); + + writel(0x2, ddr_regs + AR71XX_DDR_REG_CONTROL); /* EMR write */ + udelay(100); + + writel(CFG_DDR2_REFRESH_VAL, ddr_regs + AR71XX_DDR_REG_REFRESH); + udelay(100); + + writel(tap_val, ddr_regs + AR71XX_DDR_REG_TAP_CTRL0); + writel(tap_val, ddr_regs + AR71XX_DDR_REG_TAP_CTRL1); + writel(tap_val, ddr_regs + QCA956X_DDR_REG_TAP_CTRL2); + writel(tap_val, ddr_regs + QCA956X_DDR_REG_TAP_CTRL3); + + writel(0x633c8176, srif_regs + QCA956X_SRIF_PMU1_REG); + /* Set DDR2 Voltage to 1.8 volts */ + writel(PMU2_SWREGMSB_SET(0x40) | PMU2_PGM_SET(0x1), + srif_regs + QCA956X_SRIF_PMU2_REG); +} |