diff options
| -rw-r--r-- | arch/arm/mach-imx/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/mach-imx/imx8-ddrc.c | 107 | ||||
| -rw-r--r-- | arch/arm/mach-imx/include/mach/imx8-ddrc.h | 66 |
3 files changed, 174 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index 442039a276..28fe60dba2 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -17,6 +17,7 @@ lwl-$(CONFIG_ARCH_IMX6) += imx6-mmdc.o obj-$(CONFIG_ARCH_IMX7) += imx7.o obj-$(CONFIG_ARCH_VF610) += vf610.o obj-$(CONFIG_ARCH_IMX8MQ) += imx8mq.o +lwl-$(CONFIG_ARCH_IMX8MQ) += imx8-ddrc.o obj-$(CONFIG_ARCH_IMX_XLOAD) += xload.o obj-$(CONFIG_IMX_IIM) += iim.o obj-$(CONFIG_NAND_IMX) += nand.o diff --git a/arch/arm/mach-imx/imx8-ddrc.c b/arch/arm/mach-imx/imx8-ddrc.c new file mode 100644 index 0000000000..18454a9153 --- /dev/null +++ b/arch/arm/mach-imx/imx8-ddrc.c @@ -0,0 +1,107 @@ +#include <common.h> +#include <linux/iopoll.h> +#include <mach/imx8-ddrc.h> +#include <debug_ll.h> + +void ddrc_phy_load_firmware(void __iomem *phy, + enum ddrc_phy_firmware_offset offset, + const u16 *blob, size_t size) +{ + while (size) { + writew(*blob++, phy + DDRC_PHY_REG(offset)); + offset++; + size -= sizeof(*blob); + } +} + +enum pmc_constants { + PMC_MESSAGE_ID, + PMC_MESSAGE_STREAM, + + PMC_TRAIN_SUCCESS = 0x07, + PMC_TRAIN_STREAM_START = 0x08, + PMC_TRAIN_FAIL = 0xff, +}; + +static u32 ddrc_phy_get_message(void __iomem *phy, int type) +{ + u32 r, message; + + /* + * When BIT0 set to 0, the PMU has a message for the user + * 10ms seems not enough for poll message, so use 1s here. + */ + readl_poll_timeout(phy + DDRC_PHY_REG(0xd0004), + r, !(r & BIT(0)), 0); + + switch (type) { + case PMC_MESSAGE_ID: + /* + * Get the major message ID + */ + message = readl(phy + DDRC_PHY_REG(0xd0032)); + break; + case PMC_MESSAGE_STREAM: + message = readl(phy + DDRC_PHY_REG(0xd0034)); + message <<= 16; + message |= readl(phy + DDRC_PHY_REG(0xd0032)); + break; + } + + /* + * By setting this register to 0, the user acknowledges the + * receipt of the message. + */ + writel(0x00000000, phy + DDRC_PHY_REG(0xd0031)); + /* + * When BIT0 set to 0, the PMU has a message for the user + */ + readl_poll_timeout(phy + DDRC_PHY_REG(0xd0004), + r, r & BIT(0), 0); + + writel(0x00000001, phy + DDRC_PHY_REG(0xd0031)); + + return message; +} + +static void ddrc_phy_fetch_streaming_message(void __iomem *phy) +{ + const u16 index = ddrc_phy_get_message(phy, PMC_MESSAGE_STREAM); + u16 i; + + putc_ll('|'); + puthex_ll(index); + + for (i = 0; i < index; i++) { + const u32 arg = ddrc_phy_get_message(phy, PMC_MESSAGE_STREAM); + + putc_ll('|'); + puthex_ll(arg); + } +} + +void ddrc_phy_wait_training_complete(void __iomem *phy) +{ + for (;;) { + const u32 m = ddrc_phy_get_message(phy, PMC_MESSAGE_ID); + + puthex_ll(m); + + switch (m) { + case PMC_TRAIN_STREAM_START: + ddrc_phy_fetch_streaming_message(phy); + break; + case PMC_TRAIN_SUCCESS: + putc_ll('P'); + putc_ll('\r'); + putc_ll('\n'); + return; + case PMC_TRAIN_FAIL: + putc_ll('F'); + hang(); + } + + putc_ll('\r'); + putc_ll('\n'); + } +}
\ No newline at end of file diff --git a/arch/arm/mach-imx/include/mach/imx8-ddrc.h b/arch/arm/mach-imx/include/mach/imx8-ddrc.h new file mode 100644 index 0000000000..d49e29f263 --- /dev/null +++ b/arch/arm/mach-imx/include/mach/imx8-ddrc.h @@ -0,0 +1,66 @@ +#ifndef __IMX8_DDRC_H__ +#define __IMX8_DDRC_H__ + +#include <mach/imx8mq-regs.h> +#include <io.h> +#include <firmware.h> +#include <linux/compiler.h> + +enum ddrc_phy_firmware_offset { + DDRC_PHY_IMEM = 0x00050000U, + DDRC_PHY_DMEM = 0x00054000U, +}; + +void ddrc_phy_load_firmware(void __iomem *, + enum ddrc_phy_firmware_offset, + const u16 *, size_t); + +#define DDRC_PHY_REG(x) ((x) * 4) + +void ddrc_phy_wait_training_complete(void __iomem *phy); + + +/* + * i.MX8M DDR Tool compatibility layer + */ + +#define reg32_write(a, v) writel(v, a) +#define reg32_read(a) readl(a) + +static inline void wait_ddrphy_training_complete(void) +{ + ddrc_phy_wait_training_complete(IOMEM(MX8MQ_DDRC_PHY_BASE_ADDR)); +} + +#define __ddr_load_train_code(imem, dmem) \ + do { \ + const u16 *__mem; \ + size_t __size; \ + \ + get_builtin_firmware(imem, &__mem, &__size); \ + ddrc_phy_load_firmware(IOMEM(MX8MQ_DDRC_PHY_BASE_ADDR), \ + DDRC_PHY_IMEM, __mem, __size); \ + \ + get_builtin_firmware(dmem, &__mem, &__size); \ + ddrc_phy_load_firmware(IOMEM(MX8MQ_DDRC_PHY_BASE_ADDR), \ + DDRC_PHY_DMEM, __mem, __size); \ + } while (0) + +#define ddr_load_train_code(imem_dmem) __ddr_load_train_code(imem_dmem) + +#define DDRC_IPS_BASE_ADDR(X) (0x3d400000 + (X * 0x2000000)) + +#define DDRC_STAT(X) (DDRC_IPS_BASE_ADDR(X) + 0x04) +#define DDRC_MRSTAT(X) (DDRC_IPS_BASE_ADDR(X) + 0x18) +#define DDRC_PWRCTL(X) (DDRC_IPS_BASE_ADDR(X) + 0x30) +#define DDRC_RFSHCTL3(X) (DDRC_IPS_BASE_ADDR(X) + 0x60) +#define DDRC_CRCPARSTAT(X) (DDRC_IPS_BASE_ADDR(X) + 0xcc) +#define DDRC_DFIMISC(X) (DDRC_IPS_BASE_ADDR(X) + 0x1b0) +#define DDRC_DFISTAT(X) (DDRC_IPS_BASE_ADDR(X) + 0x1bc) +#define DDRC_SWCTL(X) (DDRC_IPS_BASE_ADDR(X) + 0x320) +#define DDRC_SWSTAT(X) (DDRC_IPS_BASE_ADDR(X) + 0x324) +#define DDRC_PCTRL_0(X) (DDRC_IPS_BASE_ADDR(X) + 0x490) + +#define IP2APB_DDRPHY_IPS_BASE_ADDR(X) (0x3c000000 + (X * 0x2000000)) + +#endif
\ No newline at end of file |