Make PowerPC specific code conditional so ARM SoCs can reuse this driver. Add DDR3 driver for ARM.
Signed-off-by: York Sun yorksun@freescale.com --- drivers/ddr/fsl/Makefile | 1 + drivers/ddr/fsl/arm_ddr_gen3.c | 213 ++++++++++++++++++++++++++++++++++++++++ drivers/ddr/fsl/main.c | 12 ++- drivers/ddr/fsl/util.c | 4 + 4 files changed, 227 insertions(+), 3 deletions(-) create mode 100644 drivers/ddr/fsl/arm_ddr_gen3.c
diff --git a/drivers/ddr/fsl/Makefile b/drivers/ddr/fsl/Makefile index cbbd178..381ec6c 100644 --- a/drivers/ddr/fsl/Makefile +++ b/drivers/ddr/fsl/Makefile @@ -34,6 +34,7 @@ COBJS-$(CONFIG_SYS_FSL_DDR_PPC_GEN1) += mpc85xx_ddr_gen1.o COBJS-$(CONFIG_SYS_FSL_DDR_PPC_GEN2) += mpc85xx_ddr_gen2.o COBJS-$(CONFIG_SYS_FSL_DDR_PPC_GEN3) += mpc85xx_ddr_gen3.o COBJS-$(CONFIG_SYS_FSL_DDR_86XX) += mpc86xx_ddr.o +COBJS-$(CONFIG_SYS_FSL_DDR_ARM_GEN3) += arm_ddr_gen3.o COBJS-$(CONFIG_FSL_DDR_INTERACTIVE) += interactive.o
SRCS := $(START:.o=.S) $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c) diff --git a/drivers/ddr/fsl/arm_ddr_gen3.c b/drivers/ddr/fsl/arm_ddr_gen3.c new file mode 100644 index 0000000..bf11390 --- /dev/null +++ b/drivers/ddr/fsl/arm_ddr_gen3.c @@ -0,0 +1,213 @@ +/* + * Copyright 2013 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + * + * Derived from mpc85xx_ddr_gen3.c, removed all workarounds + */ + +#include <common.h> +#include <asm/io.h> +#include <fsl_ddr_sdram.h> +#include <asm/processor.h> +#include <fsl_immap.h> + +#if (CONFIG_CHIP_SELECTS_PER_CTRL > 4) +#error Invalid setting for CONFIG_CHIP_SELECTS_PER_CTRL +#endif + + +/* + * regs has the to-be-set values for DDR controller registers + * ctrl_num is the DDR controller number + * step: 0 goes through the initialization in one pass + * 1 sets registers and returns before enabling controller + * 2 resumes from step 1 and continues to initialize + * Dividing the initialization to two steps to deassert DDR reset signal + * to comply with JEDEC specs for RDIMMs. + */ +void fsl_ddr_set_memctl_regs(const fsl_ddr_cfg_regs_t *regs, + unsigned int ctrl_num, int step) +{ + unsigned int i, bus_width; + struct ccsr_ddr __iomem *ddr; + u32 temp_sdram_cfg; + u32 total_gb_size_per_controller; + int timeout; + + switch (ctrl_num) { + case 0: + ddr = (void *)CONFIG_SYS_FSL_DDR_ADDR; + break; +#if defined(CONFIG_SYS_FSL_DDR2_ADDR) && (CONFIG_NUM_DDR_CONTROLLERS > 1) + case 1: + ddr = (void *)CONFIG_SYS_FSL_DDR2_ADDR; + break; +#endif +#if defined(CONFIG_SYS_FSL_DDR3_ADDR) && (CONFIG_NUM_DDR_CONTROLLERS > 2) + case 2: + ddr = (void *)CONFIG_SYS_FSL_DDR3_ADDR; + break; +#endif +#if defined(CONFIG_SYS_FSL_DDR4_ADDR) && (CONFIG_NUM_DDR_CONTROLLERS > 3) + case 3: + ddr = (void *)CONFIG_SYS_FSL_DDR4_ADDR; + break; +#endif + default: + printf("%s unexpected ctrl_num = %u\n", __func__, ctrl_num); + return; + } + + if (step == 2) + goto step2; + + if (regs->ddr_eor) + out_be32(&ddr->eor, regs->ddr_eor); + for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { + if (i == 0) { + out_be32(&ddr->cs0_bnds, regs->cs[i].bnds); + out_be32(&ddr->cs0_config, regs->cs[i].config); + out_be32(&ddr->cs0_config_2, regs->cs[i].config_2); + + } else if (i == 1) { + out_be32(&ddr->cs1_bnds, regs->cs[i].bnds); + out_be32(&ddr->cs1_config, regs->cs[i].config); + out_be32(&ddr->cs1_config_2, regs->cs[i].config_2); + + } else if (i == 2) { + out_be32(&ddr->cs2_bnds, regs->cs[i].bnds); + out_be32(&ddr->cs2_config, regs->cs[i].config); + out_be32(&ddr->cs2_config_2, regs->cs[i].config_2); + + } else if (i == 3) { + out_be32(&ddr->cs3_bnds, regs->cs[i].bnds); + out_be32(&ddr->cs3_config, regs->cs[i].config); + out_be32(&ddr->cs3_config_2, regs->cs[i].config_2); + } + } + + out_be32(&ddr->timing_cfg_3, regs->timing_cfg_3); + out_be32(&ddr->timing_cfg_0, regs->timing_cfg_0); + out_be32(&ddr->timing_cfg_1, regs->timing_cfg_1); + out_be32(&ddr->timing_cfg_2, regs->timing_cfg_2); + out_be32(&ddr->sdram_cfg_2, regs->ddr_sdram_cfg_2); + out_be32(&ddr->sdram_mode, regs->ddr_sdram_mode); + out_be32(&ddr->sdram_mode_2, regs->ddr_sdram_mode_2); + out_be32(&ddr->sdram_mode_3, regs->ddr_sdram_mode_3); + out_be32(&ddr->sdram_mode_4, regs->ddr_sdram_mode_4); + out_be32(&ddr->sdram_mode_5, regs->ddr_sdram_mode_5); + out_be32(&ddr->sdram_mode_6, regs->ddr_sdram_mode_6); + out_be32(&ddr->sdram_mode_7, regs->ddr_sdram_mode_7); + out_be32(&ddr->sdram_mode_8, regs->ddr_sdram_mode_8); + out_be32(&ddr->sdram_md_cntl, regs->ddr_sdram_md_cntl); + out_be32(&ddr->sdram_interval, regs->ddr_sdram_interval); + out_be32(&ddr->sdram_data_init, regs->ddr_data_init); + out_be32(&ddr->sdram_clk_cntl, regs->ddr_sdram_clk_cntl); + out_be32(&ddr->init_addr, regs->ddr_init_addr); + out_be32(&ddr->init_ext_addr, regs->ddr_init_ext_addr); + + out_be32(&ddr->timing_cfg_4, regs->timing_cfg_4); + out_be32(&ddr->timing_cfg_5, regs->timing_cfg_5); + out_be32(&ddr->ddr_zq_cntl, regs->ddr_zq_cntl); + out_be32(&ddr->ddr_wrlvl_cntl, regs->ddr_wrlvl_cntl); +#ifndef CONFIG_SYS_FSL_DDR_EMU + /* + * Skip these two registers if running on emulator + * because emulator doesn't have skew between bytes. + */ + + if (regs->ddr_wrlvl_cntl_2) + out_be32(&ddr->ddr_wrlvl_cntl_2, regs->ddr_wrlvl_cntl_2); + if (regs->ddr_wrlvl_cntl_3) + out_be32(&ddr->ddr_wrlvl_cntl_3, regs->ddr_wrlvl_cntl_3); +#endif + + out_be32(&ddr->ddr_sr_cntr, regs->ddr_sr_cntr); + out_be32(&ddr->ddr_sdram_rcw_1, regs->ddr_sdram_rcw_1); + out_be32(&ddr->ddr_sdram_rcw_2, regs->ddr_sdram_rcw_2); + out_be32(&ddr->ddr_cdr1, regs->ddr_cdr1); + out_be32(&ddr->ddr_cdr2, regs->ddr_cdr2); + out_be32(&ddr->err_disable, regs->err_disable); + out_be32(&ddr->err_int_en, regs->err_int_en); + for (i = 0; i < 32; i++) { + if (regs->debug[i]) { + debug("Write to debug_%d as %08x\n", i + 1, + regs->debug[i]); + out_be32(&ddr->debug[i], regs->debug[i]); + } + } + + /* + * For RDIMMs, JEDEC spec requires clocks to be stable before reset is + * deasserted. Clocks start when any chip select is enabled and clock + * control register is set. Because all DDR components are connected to + * one reset signal, this needs to be done in two steps. Step 1 is to + * get the clocks started. Step 2 resumes after reset signal is + * deasserted. + */ + if (step == 1) { + udelay(200); + return; + } + +step2: + /* Set, but do not enable the memory */ + temp_sdram_cfg = regs->ddr_sdram_cfg; + temp_sdram_cfg &= ~(SDRAM_CFG_MEM_EN); + out_be32(&ddr->sdram_cfg, temp_sdram_cfg); + + /* + * 500 painful micro-seconds must elapse between + * the DDR clock setup and the DDR config enable. + * DDR2 need 200 us, and DDR3 need 500 us from spec, + * we choose the max, that is 500 us for all of case. + */ + udelay(500); + asm volatile("dsb sy;isb"); + + /* Let the controller go */ + temp_sdram_cfg = in_be32(&ddr->sdram_cfg) & ~SDRAM_CFG_BI; + out_be32(&ddr->sdram_cfg, temp_sdram_cfg | SDRAM_CFG_MEM_EN); + asm volatile("dsb sy;isb"); + + total_gb_size_per_controller = 0; + for (i = 0; i < CONFIG_CHIP_SELECTS_PER_CTRL; i++) { + if (!(regs->cs[i].config & 0x80000000)) + continue; + total_gb_size_per_controller += 1 << ( + ((regs->cs[i].config >> 14) & 0x3) + 2 + + ((regs->cs[i].config >> 8) & 0x7) + 12 + + ((regs->cs[i].config >> 0) & 0x7) + 8 + + 3 - ((regs->ddr_sdram_cfg >> 19) & 0x3) - + 26); /* minus 26 (count of 64M) */ + } + if (regs->cs[0].config & 0x20000000) { + /* 2-way interleaving */ + total_gb_size_per_controller <<= 1; + } + /* + * total memory / bus width = transactions needed + * transactions needed / data rate = seconds + * to add plenty of buffer, double the time + * For example, 2GB on 666MT/s 64-bit bus takes about 402ms + * Let's wait for 800ms + */ + bus_width = 3 - ((ddr->sdram_cfg & SDRAM_CFG_DBW_MASK) + >> SDRAM_CFG_DBW_SHIFT); + timeout = ((total_gb_size_per_controller << (6 - bus_width)) * 100 / + (get_ddr_freq(0) >> 20)) << 1; + total_gb_size_per_controller >>= 4; /* shift down to gb size */ + debug("total %d GB\n", total_gb_size_per_controller); + debug("Need to wait up to %d * 10ms\n", timeout); + + /* Poll DDR_SDRAM_CFG_2[D_INIT] bit until auto-data init is done. */ + while ((in_be32(&ddr->sdram_cfg_2) & SDRAM_CFG2_D_INIT) && + (timeout >= 0)) { + udelay(10000); /* throttle polling rate */ + timeout--; + } + + if (timeout <= 0) + printf("Waiting for D_INIT timeout. Memory may not work.\n"); +} diff --git a/drivers/ddr/fsl/main.c b/drivers/ddr/fsl/main.c index c1cdbdf..b4988e1 100644 --- a/drivers/ddr/fsl/main.c +++ b/drivers/ddr/fsl/main.c @@ -15,16 +15,18 @@ #include <common.h> #include <i2c.h> #include <fsl_ddr_sdram.h> -#include <asm/fsl_law.h> - #include <fsl_ddr.h>
+#ifdef CONFIG_PPC +#include <asm/fsl_law.h> + void fsl_ddr_set_lawbar( const common_timing_params_t *memctl_common_params, unsigned int memctl_interleaved, unsigned int ctrl_num); -void fsl_ddr_set_intl3r(const unsigned int granule_size); +#endif
+void fsl_ddr_set_intl3r(const unsigned int granule_size); #if defined(SPD_EEPROM_ADDRESS) || \ defined(SPD_EEPROM_ADDRESS1) || defined(SPD_EEPROM_ADDRESS2) || \ defined(SPD_EEPROM_ADDRESS3) || defined(SPD_EEPROM_ADDRESS4) @@ -549,7 +551,9 @@ fsl_ddr_compute(fsl_ddr_info_t *pinfo, unsigned int start_step, phys_size_t fsl_ddr_sdram(void) { unsigned int i; +#ifdef CONFIG_PPC unsigned int law_memctl = LAW_TRGT_IF_DDR_1; +#endif unsigned long long total_memory; fsl_ddr_info_t info; int deassert_reset; @@ -621,6 +625,7 @@ phys_size_t fsl_ddr_sdram(void) } }
+#ifdef CONFIG_PPC /* program LAWs */ for (i = 0; i < CONFIG_NUM_DDR_CONTROLLERS; i++) { if (info.memctl_opts[i].memctl_interleaving) { @@ -681,6 +686,7 @@ phys_size_t fsl_ddr_sdram(void) law_memctl, i); } } +#endif
debug("total_memory by %s = %llu\n", __func__, total_memory);
diff --git a/drivers/ddr/fsl/util.c b/drivers/ddr/fsl/util.c index 5d6b362..0658261 100644 --- a/drivers/ddr/fsl/util.c +++ b/drivers/ddr/fsl/util.c @@ -7,7 +7,9 @@ */
#include <common.h> +#ifdef CONFIG_PPC #include <asm/fsl_law.h> +#endif #include <div64.h>
#include <fsl_ddr.h> @@ -79,6 +81,7 @@ unsigned int mclk_to_picos(unsigned int mclk) return get_memory_clk_period_ps() * mclk; }
+#ifdef CONFIG_PPC void __fsl_ddr_set_lawbar(const common_timing_params_t *memctl_common_params, unsigned int law_memctl, @@ -113,6 +116,7 @@ __attribute__((weak, alias("__fsl_ddr_set_lawbar"))) void fsl_ddr_set_lawbar(const common_timing_params_t *memctl_common_params, unsigned int memctl_interleaved, unsigned int ctrl_num); +#endif
void fsl_ddr_set_intl3r(const unsigned int granule_size) {