diff options
Diffstat (limited to 'drivers/mmc/octeontx_hsmmc.c')
| -rw-r--r-- | drivers/mmc/octeontx_hsmmc.c | 3897 |
1 files changed, 3897 insertions, 0 deletions
diff --git a/drivers/mmc/octeontx_hsmmc.c b/drivers/mmc/octeontx_hsmmc.c new file mode 100644 index 0000000000..ddc36694e1 --- /dev/null +++ b/drivers/mmc/octeontx_hsmmc.c @@ -0,0 +1,3897 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 Marvell International Ltd. + * + * https://spdx.org/licenses + */ + +//#define DEBUG +#include <cpu_func.h> +#include <dm.h> +#include <dm/lists.h> +#include <env.h> +#include <errno.h> +#include <fdtdec.h> +#include <log.h> +#include <malloc.h> +#include <memalign.h> +#include <mmc.h> +#include <part.h> +#include <pci.h> +#include <pci_ids.h> +#include <time.h> +#include <watchdog.h> + +#include <linux/delay.h> +#include <linux/kernel.h> +#include <linux/libfdt.h> + +#include <asm/arch/board.h> +#include <asm/arch/clock.h> +#include <asm/arch/csrs/csrs-mio_emm.h> +#include <asm/io.h> + +#include <power/regulator.h> + +#include "octeontx_hsmmc.h" + +#define MMC_TIMEOUT_SHORT 20 /* in ms */ +#define MMC_TIMEOUT_LONG 1000 +#define MMC_TIMEOUT_ERASE 10000 + +#define MMC_DEFAULT_DATA_IN_TAP 10 +#define MMC_DEFAULT_CMD_IN_TAP 10 +#define MMC_DEFAULT_CMD_OUT_TAP 39 +#define MMC_DEFAULT_DATA_OUT_TAP 39 +#define MMC_DEFAULT_HS200_CMD_IN_TAP 24 +#define MMC_DEFAULT_HS200_DATA_IN_TAP 24 +#define MMC_DEFAULT_HS200_CMD_OUT_TAP (otx_is_soc(CN95XX) ? 10 : 5) +#define MMC_DEFAULT_HS200_DATA_OUT_TAP (otx_is_soc(CN95XX) ? 10 : 5) +#define MMC_DEFAULT_HS400_CMD_OUT_TAP (otx_is_soc(CN95XX) ? 10 : 5) +#define MMC_DEFAULT_HS400_DATA_OUT_TAP (otx_is_soc(CN95XX) ? 5 : 3) +#define MMC_DEFAULT_HS200_CMD_OUT_DLY 800 /* Delay in ps */ +#define MMC_DEFAULT_HS200_DATA_OUT_DLY 800 /* Delay in ps */ +#define MMC_DEFAULT_HS400_CMD_OUT_DLY 800 /* Delay in ps */ +#define MMC_DEFAULT_HS400_DATA_OUT_DLY 400 /* Delay in ps */ +#define MMC_DEFAULT_SD_UHS_SDR104_CMD_OUT_TAP MMC_DEFAULT_HS200_CMD_OUT_TAP +#define MMC_DEFAULT_SD_UHS_SDR104_DATA_OUT_TAP MMC_DEFAULT_HS200_DATA_OUT_TAP +#define MMC_LEGACY_DEFAULT_CMD_OUT_TAP 39 +#define MMC_LEGACY_DEFAULT_DATA_OUT_TAP 39 +#define MMC_SD_LEGACY_DEFAULT_CMD_OUT_TAP 63 +#define MMC_SD_LEGACY_DEFAULT_DATA_OUT_TAP 63 +#define MMC_HS_CMD_OUT_TAP 32 +#define MMC_HS_DATA_OUT_TAP 32 +#define MMC_SD_HS_CMD_OUT_TAP 26 +#define MMC_SD_HS_DATA_OUT_TAP 26 +#define MMC_SD_UHS_SDR25_CMD_OUT_TAP 26 +#define MMC_SD_UHS_SDR25_DATA_OUT_TAP 26 +#define MMC_SD_UHS_SDR50_CMD_OUT_TAP 26 +#define MMC_SD_UHS_SDR50_DATA_OUT_TAP 26 +#define MMC_DEFAULT_TAP_DELAY 4 +#define TOTAL_NO_OF_TAPS 512 +static void octeontx_mmc_switch_to(struct mmc *mmc); +static int octeontx_mmc_configure_delay(struct mmc *mmc); +static void octeontx_mmc_set_timing(struct mmc *mmc); +static void set_wdog(struct mmc *mmc, u64 us); +static void do_switch(struct mmc *mmc, union mio_emm_switch emm_switch); +static int octeontx_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data); +static int octeontx2_mmc_calc_delay(struct mmc *mmc, int delay); +static int octeontx_mmc_calibrate_delay(struct mmc *mmc); +static int octeontx_mmc_set_input_bus_timing(struct mmc *mmc); +static int octeontx_mmc_set_output_bus_timing(struct mmc *mmc); + +static bool host_probed; + +/** + * Get the slot data structure from a MMC data structure + */ +static inline struct octeontx_mmc_slot *mmc_to_slot(struct mmc *mmc) +{ + return container_of(mmc, struct octeontx_mmc_slot, mmc); +} + +static inline struct octeontx_mmc_host *mmc_to_host(struct mmc *mmc) +{ + return mmc_to_slot(mmc)->host; +} + +static inline struct octeontx_mmc_slot *dev_to_mmc_slot(struct udevice *dev) +{ + return dev_get_priv(dev); +} + +static inline struct mmc *dev_to_mmc(struct udevice *dev) +{ + return &((struct octeontx_mmc_slot *)dev_get_priv(dev))->mmc; +} + +#ifdef DEBUG +const char *mmc_reg_str(u64 reg) +{ + if (reg == MIO_EMM_DMA_CFG()) + return "MIO_EMM_DMA_CFG"; + if (reg == MIO_EMM_DMA_ADR()) + return "MIO_EMM_DMA_ADR"; + if (reg == MIO_EMM_DMA_INT()) + return "MIO_EMM_DMA_INT"; + if (reg == MIO_EMM_CFG()) + return "MIO_EMM_CFG"; + if (reg == MIO_EMM_MODEX(0)) + return "MIO_EMM_MODE0"; + if (reg == MIO_EMM_MODEX(1)) + return "MIO_EMM_MODE1"; + if (reg == MIO_EMM_MODEX(2)) + return "MIO_EMM_MODE2"; + if (reg == MIO_EMM_MODEX(3)) + return "MIO_EMM_MODE3"; + if (reg == MIO_EMM_IO_CTL()) + return "MIO_EMM_IO_CTL"; + if (reg == MIO_EMM_SWITCH()) + return "MIO_EMM_SWITCH"; + if (reg == MIO_EMM_DMA()) + return "MIO_EMM_DMA"; + if (reg == MIO_EMM_CMD()) + return "MIO_EMM_CMD"; + if (reg == MIO_EMM_RSP_STS()) + return "MIO_EMM_RSP_STS"; + if (reg == MIO_EMM_RSP_LO()) + return "MIO_EMM_RSP_LO"; + if (reg == MIO_EMM_RSP_HI()) + return "MIO_EMM_RSP_HI"; + if (reg == MIO_EMM_INT()) + return "MIO_EMM_INT"; + if (reg == MIO_EMM_WDOG()) + return "MIO_EMM_WDOG"; + if (reg == MIO_EMM_DMA_ARG()) + return "MIO_EMM_DMA_ARG"; + if (IS_ENABLED(CONFIG_ARCH_OCTEONTX)) { + if (reg == MIO_EMM_SAMPLE()) + return "MIO_EMM_SAMPLE"; + } + if (reg == MIO_EMM_STS_MASK()) + return "MIO_EMM_STS_MASK"; + if (reg == MIO_EMM_RCA()) + return "MIO_EMM_RCA"; + if (reg == MIO_EMM_BUF_IDX()) + return "MIO_EMM_BUF_IDX"; + if (reg == MIO_EMM_BUF_DAT()) + return "MIO_EMM_BUF_DAT"; + if (!IS_ENABLED(CONFIG_ARCH_OCTEONTX)) { + if (reg == MIO_EMM_CALB()) + return "MIO_EMM_CALB"; + if (reg == MIO_EMM_TAP()) + return "MIO_EMM_TAP"; + if (reg == MIO_EMM_TIMING()) + return "MIO_EMM_TIMING"; + if (reg == MIO_EMM_DEBUG()) + return "MIO_EMM_DEBUG"; + } + + return "UNKNOWN"; +} +#endif + +static void octeontx_print_rsp_sts(struct mmc *mmc) +{ +#ifdef DEBUG + union mio_emm_rsp_sts emm_rsp_sts; + const struct octeontx_mmc_host *host = mmc_to_host(mmc); + static const char * const ctype_xor_str[] = { + "No data", + "Read data into Dbuf", + "Write data from Dbuf", + "Reserved" + }; + + static const char * const rtype_xor_str[] = { + "No response", + "R1, 48 bits", + "R2, 136 bits", + "R3, 48 bits", + "R4, 48 bits", + "R5, 48 bits", + "Reserved 6", + "Reserved 7" + }; + + emm_rsp_sts.u = readq(host->base_addr + MIO_EMM_RSP_STS()); + printf("\nMIO_EMM_RSP_STS: 0x%016llx\n", emm_rsp_sts.u); + printf(" 60-61: bus_id: %u\n", emm_rsp_sts.s.bus_id); + printf(" 59: cmd_val: %s\n", + emm_rsp_sts.s.cmd_val ? "yes" : "no"); + printf(" 58: switch_val: %s\n", + emm_rsp_sts.s.switch_val ? "yes" : "no"); + printf(" 57: dma_val: %s\n", + emm_rsp_sts.s.dma_val ? "yes" : "no"); + printf(" 56: dma_pend: %s\n", + emm_rsp_sts.s.dma_pend ? "yes" : "no"); + printf(" 28: dbuf_err: %s\n", + emm_rsp_sts.s.dbuf_err ? "yes" : "no"); + printf(" 23: dbuf: %u\n", emm_rsp_sts.s.dbuf); + printf(" 22: blk_timeout: %s\n", + emm_rsp_sts.s.blk_timeout ? "yes" : "no"); + printf(" 21: blk_crc_err: %s\n", + emm_rsp_sts.s.blk_crc_err ? "yes" : "no"); + printf(" 20: rsp_busybit: %s\n", + emm_rsp_sts.s.rsp_busybit ? "yes" : "no"); + printf(" 19: stp_timeout: %s\n", + emm_rsp_sts.s.stp_timeout ? "yes" : "no"); + printf(" 18: stp_crc_err: %s\n", + emm_rsp_sts.s.stp_crc_err ? "yes" : "no"); + printf(" 17: stp_bad_sts: %s\n", + emm_rsp_sts.s.stp_bad_sts ? "yes" : "no"); + printf(" 16: stp_val: %s\n", + emm_rsp_sts.s.stp_val ? "yes" : "no"); + printf(" 15: rsp_timeout: %s\n", + emm_rsp_sts.s.rsp_timeout ? "yes" : "no"); + printf(" 14: rsp_crc_err: %s\n", + emm_rsp_sts.s.rsp_crc_err ? "yes" : "no"); + printf(" 13: rsp_bad_sts: %s\n", + emm_rsp_sts.s.rsp_bad_sts ? "yes" : "no"); + printf(" 12: rsp_val: %s\n", + emm_rsp_sts.s.rsp_val ? "yes" : "no"); + printf(" 9-11: rsp_type: %s\n", + rtype_xor_str[emm_rsp_sts.s.rsp_type]); + printf(" 7-8: cmd_type: %s\n", + ctype_xor_str[emm_rsp_sts.s.cmd_type]); + printf(" 1-6: cmd_idx: %u\n", + emm_rsp_sts.s.cmd_idx); + printf(" 0: cmd_done: %s\n", + emm_rsp_sts.s.cmd_done ? "yes" : "no"); +#endif +} + +static inline u64 read_csr(struct mmc *mmc, u64 reg) +{ + const struct octeontx_mmc_host *host = mmc_to_host(mmc); + u64 value = readq(host->base_addr + reg); +#ifdef DEBUG_CSR + printf(" %s: %s(0x%p) => 0x%llx\n", __func__, + mmc_reg_str(reg), host->base_addr + reg, + value); +#endif + return value; +} + +/** + * Writes to a CSR register + * + * @param[in] mmc pointer to mmc data structure + * @param reg register offset + * @param value value to write to register + */ +static inline void write_csr(struct mmc *mmc, u64 reg, u64 value) +{ + const struct octeontx_mmc_host *host = mmc_to_host(mmc); + void *addr = host->base_addr + reg; + +#ifdef DEBUG_CSR + printf(" %s: %s(0x%p) <= 0x%llx\n", __func__, mmc_reg_str(reg), + addr, value); +#endif + writeq(value, addr); +} + +#ifdef DEBUG +static void mmc_print_status(u32 status) +{ +#ifdef DEBUG_STATUS + static const char * const state[] = { + "Idle", /* 0 */ + "Ready", /* 1 */ + "Ident", /* 2 */ + "Standby", /* 3 */ + "Tran", /* 4 */ + "Data", /* 5 */ + "Receive", /* 6 */ + "Program", /* 7 */ + "Dis", /* 8 */ + "Btst", /* 9 */ + "Sleep", /* 10 */ + "reserved", /* 11 */ + "reserved", /* 12 */ + "reserved", /* 13 */ + "reserved", /* 14 */ + "reserved" /* 15 */ }; + if (status & R1_APP_CMD) + puts("MMC ACMD\n"); + if (status & R1_SWITCH_ERROR) + puts("MMC switch error\n"); + if (status & R1_READY_FOR_DATA) + puts("MMC ready for data\n"); + printf("MMC %s state\n", state[R1_CURRENT_STATE(status)]); + if (status & R1_ERASE_RESET) + puts("MMC erase reset\n"); + if (status & R1_WP_ERASE_SKIP) + puts("MMC partial erase due to write protected blocks\n"); + if (status & R1_CID_CSD_OVERWRITE) + puts("MMC CID/CSD overwrite error\n"); + if (status & R1_ERROR) + puts("MMC undefined device error\n"); + if (status & R1_CC_ERROR) + puts("MMC device error\n"); + if (status & R1_CARD_ECC_FAILED) + puts("MMC internal ECC failed to correct data\n"); + if (status & R1_ILLEGAL_COMMAND) + puts("MMC illegal command\n"); + if (status & R1_COM_CRC_ERROR) + puts("MMC CRC of previous command failed\n"); + if (status & R1_LOCK_UNLOCK_FAILED) + puts("MMC sequence or password error in lock/unlock device command\n"); + if (status & R1_CARD_IS_LOCKED) + puts("MMC device locked by host\n"); + if (status & R1_WP_VIOLATION) + puts("MMC attempt to program write protected block\n"); + if (status & R1_ERASE_PARAM) + puts("MMC invalid selection of erase groups for erase\n"); + if (status & R1_ERASE_SEQ_ERROR) + puts("MMC error in sequence of erase commands\n"); + if (status & R1_BLOCK_LEN_ERROR) + puts("MMC block length error\n"); + if (status & R1_ADDRESS_ERROR) + puts("MMC address misalign error\n"); + if (status & R1_OUT_OF_RANGE) + puts("MMC address out of range\n"); +#endif +} +#endif + +/** + * Print out all of the register values where mmc is optional + * + * @param mmc MMC device (can be NULL) + * @param host Pointer to host data structure (can be NULL if mmc is !NULL) + */ +static void octeontx_mmc_print_registers2(struct mmc *mmc, + struct octeontx_mmc_host *host) +{ + struct octeontx_mmc_slot *slot = mmc ? mmc->priv : NULL; + union mio_emm_dma_cfg emm_dma_cfg; + union mio_emm_dma_adr emm_dma_adr; + union mio_emm_dma_int emm_dma_int; + union mio_emm_cfg emm_cfg; + union mio_emm_modex emm_mode; + union mio_emm_switch emm_switch; + union mio_emm_dma emm_dma; + union mio_emm_cmd emm_cmd; + union mio_emm_rsp_sts emm_rsp_sts; + union mio_emm_rsp_lo emm_rsp_lo; + union mio_emm_rsp_hi emm_rsp_hi; + union mio_emm_int emm_int; + union mio_emm_wdog emm_wdog; + union mio_emm_sample emm_sample; + union mio_emm_calb emm_calb; + union mio_emm_tap emm_tap; + union mio_emm_timing emm_timing; + union mio_emm_io_ctl io_ctl; + union mio_emm_debug emm_debug; + union mio_emm_sts_mask emm_sts_mask; + union mio_emm_rca emm_rca; + int bus; + + static const char * const bus_width_str[] = { + "1-bit data bus (power on)", + "4-bit data bus", + "8-bit data bus", + "reserved (3)", + "reserved (4)", + "4-bit data bus (dual data rate)", + "8-bit data bus (dual data rate)", + "reserved (7)", + "reserved (8)", + "invalid (9)", + "invalid (10)", + "invalid (11)", + "invalid (12)", + "invalid (13)", + "invalid (14)", + "invalid (15)", + }; + static const char * const ctype_xor_str[] = { + "No data", + "Read data into Dbuf", + "Write data from Dbuf", + "Reserved" + }; + + static const char * const rtype_xor_str[] = { + "No response", + "R1, 48 bits", + "R2, 136 bits", + "R3, 48 bits", + "R4, 48 bits", + "R5, 48 bits", + "Reserved 6", + "Reserved 7" + }; + + if (!host && mmc) + host = mmc_to_host(mmc); + + if (mmc) + printf("%s: bus id: %u\n", __func__, slot->bus_id); + emm_dma_cfg.u = readq(host->base_addr + MIO_EMM_DMA_CFG()); + printf("MIO_EMM_DMA_CFG: 0x%016llx\n", + emm_dma_cfg.u); + printf(" 63: en: %s\n", + emm_dma_cfg.s.en ? "enabled" : "disabled"); + printf(" 62: rw: %s\n", + emm_dma_cfg.s.rw ? "write" : "read"); + printf(" 61: clr: %s\n", + emm_dma_cfg.s.clr ? "clear" : "not clear"); + printf(" 59: swap32: %s\n", + emm_dma_cfg.s.swap32 ? "yes" : "no"); + printf(" 58: swap16: %s\n", + emm_dma_cfg.s.swap16 ? "yes" : "no"); + printf(" 57: swap8: %s\n", + emm_dma_cfg.s.swap8 ? "yes" : "no"); + printf(" 56: endian: %s\n", + emm_dma_cfg.s.endian ? "little" : "big"); + printf(" 36-55: size: %u\n", + emm_dma_cfg.s.size); + + emm_dma_adr.u = readq(host->base_addr + MIO_EMM_DMA_ADR()); + printf("MIO_EMM_DMA_ADR: 0x%016llx\n", emm_dma_adr.u); + printf(" 0-49: adr: 0x%llx\n", + (u64)emm_dma_adr.s.adr); + + emm_dma_int.u = readq(host->base_addr + MIO_EMM_DMA_INT()); + printf("\nMIO_EMM_DMA_INT: 0x%016llx\n", + emm_dma_int.u); + printf(" 1: FIFO: %s\n", + emm_dma_int.s.fifo ? "yes" : "no"); + printf(" 0: Done: %s\n", + emm_dma_int.s.done ? "yes" : "no"); + emm_cfg.u = readq(host->base_addr + MIO_EMM_CFG()); + + printf("\nMIO_EMM_CFG: 0x%016llx\n", + emm_cfg.u); + printf(" 3: bus_ena3: %s\n", + emm_cfg.s.bus_ena & 0x08 ? "yes" : "no"); + printf(" 2: bus_ena2: %s\n", + emm_cfg.s.bus_ena & 0x04 ? "yes" : "no"); + printf(" 1: bus_ena1: %s\n", + emm_cfg.s.bus_ena & 0x02 ? "yes" : "no"); + printf(" 0: bus_ena0: %s\n", + emm_cfg.s.bus_ena & 0x01 ? "yes" : "no"); + for (bus = 0; bus < 4; bus++) { + emm_mode.u = readq(host->base_addr + MIO_EMM_MODEX(bus)); + printf("\nMIO_EMM_MODE%u: 0x%016llx\n", + bus, emm_mode.u); + if (!IS_ENABLED(CONFIG_ARCH_OCTEONTX)) { + printf(" 50: hs400_timing: %s\n", + emm_mode.s.hs400_timing ? "yes" : "no"); + printf(" 49: hs200_timing: %s\n", + emm_mode.s.hs200_timing ? "yes" : "no"); + } + printf(" 48: hs_timing: %s\n", + emm_mode.s.hs_timing ? "yes" : "no"); + printf(" 40-42: bus_width: %s\n", + bus_width_str[emm_mode.s.bus_width]); + printf(" 32-35: power_class %u\n", + emm_mode.s.power_class); + printf(" 16-31: clk_hi: %u\n", + emm_mode.s.clk_hi); + printf(" 0-15: clk_lo: %u\n", + emm_mode.s.clk_lo); + } + + emm_switch.u = readq(host->base_addr + MIO_EMM_SWITCH()); + printf("\nMIO_EMM_SWITCH: 0x%016llx\n", emm_switch.u); + printf(" 60-61: bus_id: %u\n", emm_switch.s.bus_id); + printf(" 59: switch_exe: %s\n", + emm_switch.s.switch_exe ? "yes" : "no"); + printf(" 58: switch_err0: %s\n", + emm_switch.s.switch_err0 ? "yes" : "no"); + printf(" 57: switch_err1: %s\n", + emm_switch.s.switch_err1 ? "yes" : "no"); + printf(" 56: switch_err2: %s\n", + emm_switch.s.switch_err2 ? "yes" : "no"); + printf(" 48: hs_timing: %s\n", + emm_switch.s.hs_timing ? "yes" : "no"); + printf(" 42-40: bus_width: %s\n", + bus_width_str[emm_switch.s.bus_width]); + printf(" 32-35: power_class: %u\n", + emm_switch.s.power_class); + printf(" 16-31: clk_hi: %u\n", + emm_switch.s.clk_hi); + printf(" 0-15: clk_lo: %u\n", emm_switch.s.clk_lo); + + emm_dma.u = readq(host->base_addr + MIO_EMM_DMA()); + printf("\nMIO_EMM_DMA: 0x%016llx\n", emm_dma.u); + printf(" 60-61: bus_id: %u\n", emm_dma.s.bus_id); + printf(" 59: dma_val: %s\n", + emm_dma.s.dma_val ? "yes" : "no"); + printf(" 58: sector: %s mode\n", + emm_dma.s.sector ? "sector" : "byte"); + printf(" 57: dat_null: %s\n", + emm_dma.s.dat_null ? "yes" : "no"); + printf(" 51-56: thres: %u\n", emm_dma.s.thres); + printf(" 50: rel_wr: %s\n", + emm_dma.s.rel_wr ? "yes" : "no"); + printf(" 49: rw: %s\n", + emm_dma.s.rw ? "write" : "read"); + printf(" 48: multi: %s\n", + emm_dma.s.multi ? "yes" : "no"); + printf(" 32-47: block_cnt: %u\n", + emm_dma.s.block_cnt); + printf(" 0-31: card_addr: 0x%x\n", + emm_dma.s.card_addr); + + emm_cmd.u = readq(host->base_addr + MIO_EMM_CMD()); + printf("\nMIO_EMM_CMD: 0x%016llx\n", emm_cmd.u); + printf("\n 62: skip_busy: %s\n", + emm_cmd.s.skip_busy ? "yes" : "no"); + printf(" 60-61: bus_id: %u\n", emm_cmd.s.bus_id); + printf(" 59: cmd_val: %s\n", + emm_cmd.s.cmd_val ? "yes" : "no"); + printf(" 55: dbuf: %u\n", emm_cmd.s.dbuf); + printf(" 49-54: offset: %u\n", emm_cmd.s.offset); + printf(" 41-42: ctype_xor: %s\n", + ctype_xor_str[emm_cmd.s.ctype_xor]); + printf(" 38-40: rtype_xor: %s\n", + rtype_xor_str[emm_cmd.s.rtype_xor]); + printf(" 32-37: cmd_idx: %u\n", emm_cmd.s.cmd_idx); + printf(" 0-31: arg: 0x%x\n", emm_cmd.s.arg); + + emm_rsp_sts.u = readq(host->base_addr + MIO_EMM_RSP_STS()); + printf("\nMIO_EMM_RSP_STS: 0x%016llx\n", emm_rsp_sts.u); + printf(" 60-61: bus_id: %u\n", emm_rsp_sts.s.bus_id); + printf(" 59: cmd_val: %s\n", + emm_rsp_sts.s.cmd_val ? "yes" : "no"); + printf(" 58: switch_val: %s\n", + emm_rsp_sts.s.switch_val ? "yes" : "no"); + printf(" 57: dma_val: %s\n", + emm_rsp_sts.s.dma_val ? "yes" : "no"); + printf(" 56: dma_pend: %s\n", + emm_rsp_sts.s.dma_pend ? "yes" : "no"); + printf(" 28: dbuf_err: %s\n", + emm_rsp_sts.s.dbuf_err ? "yes" : "no"); + printf(" 23: dbuf: %u\n", emm_rsp_sts.s.dbuf); + printf(" 22: blk_timeout: %s\n", + emm_rsp_sts.s.blk_timeout ? "yes" : "no"); + printf(" 21: blk_crc_err: %s\n", + emm_rsp_sts.s.blk_crc_err ? "yes" : "no"); + printf(" 20: rsp_busybit: %s\n", + emm_rsp_sts.s.rsp_busybit ? "yes" : "no"); + printf(" 19: stp_timeout: %s\n", + emm_rsp_sts.s.stp_timeout ? "yes" : "no"); + printf(" 18: stp_crc_err: %s\n", + emm_rsp_sts.s.stp_crc_err ? "yes" : "no"); + printf(" 17: stp_bad_sts: %s\n", + emm_rsp_sts.s.stp_bad_sts ? "yes" : "no"); + printf(" 16: stp_val: %s\n", + emm_rsp_sts.s.stp_val ? "yes" : "no"); + printf(" 15: rsp_timeout: %s\n", + emm_rsp_sts.s.rsp_timeout ? "yes" : "no"); + printf(" 14: rsp_crc_err: %s\n", + emm_rsp_sts.s.rsp_crc_err ? "yes" : "no"); + printf(" 13: rsp_bad_sts: %s\n", + emm_rsp_sts.s.rsp_bad_sts ? "yes" : "no"); + printf(" 12: rsp_val: %s\n", + emm_rsp_sts.s.rsp_val ? "yes" : "no"); + printf(" 9-11: rsp_type: %s\n", + rtype_xor_str[emm_rsp_sts.s.rsp_type]); + printf(" 7-8: cmd_type: %s\n", + ctype_xor_str[emm_rsp_sts.s.cmd_type]); + printf(" 1-6: cmd_idx: %u\n", + emm_rsp_sts.s.cmd_idx); + printf(" 0: cmd_done: %s\n", + emm_rsp_sts.s.cmd_done ? "yes" : "no"); + + emm_rsp_lo.u = readq(host->base_addr + MIO_EMM_RSP_LO()); + printf("\nMIO_EMM_RSP_STS_LO: 0x%016llx\n", emm_rsp_lo.u); + + emm_rsp_hi.u = readq(host->base_addr + MIO_EMM_RSP_HI()); + printf("\nMIO_EMM_RSP_STS_HI: 0x%016llx\n", emm_rsp_hi.u); + + emm_int.u = readq(host->base_addr + MIO_EMM_INT()); + printf("\nMIO_EMM_INT: 0x%016llx\n", emm_int.u); + printf(" 6: switch_err: %s\n", + emm_int.s.switch_err ? "yes" : "no"); + printf(" 5: switch_done: %s\n", + emm_int.s.switch_done ? "yes" : "no"); + printf(" 4: dma_err: %s\n", + emm_int.s.dma_err ? "yes" : "no"); + printf(" 3: cmd_err: %s\n", + emm_int.s.cmd_err ? "yes" : "no"); + printf(" 2: dma_done: %s\n", + emm_int.s.dma_done ? "yes" : "no"); + printf(" 1: cmd_done: %s\n", + emm_int.s.cmd_done ? "yes" : "no"); + printf(" 0: buf_done: %s\n", + emm_int.s.buf_done ? "yes" : "no"); + + emm_wdog.u = readq(host->base_addr + MIO_EMM_WDOG()); + printf("\nMIO_EMM_WDOG: 0x%016llx (%u)\n", + emm_wdog.u, emm_wdog.s.clk_cnt); + + if (IS_ENABLED(CONFIG_ARCH_OCTEONTX)) { + emm_sample.u = readq(host->base_addr + MIO_EMM_SAMPLE()); + printf("\nMIO_EMM_SAMPLE: 0x%016llx\n", + emm_sample.u); + printf(" 16-25: cmd_cnt: %u\n", + emm_sample.s.cmd_cnt); + printf(" 0-9: dat_cnt: %u\n", + emm_sample.s.dat_cnt); + } + + emm_sts_mask.u = readq(host->base_addr + MIO_EMM_STS_MASK()); + printf("\nMIO_EMM_STS_MASK: 0x%016llx\n", emm_sts_mask.u); + + emm_rca.u = readq(host->base_addr + MIO_EMM_RCA()); + printf("\nMIO_EMM_RCA: 0x%016llx\n", emm_rca.u); + printf(" 0-15: card_rca: 0x%04x\n", + emm_rca.s.card_rca); + if (!IS_ENABLED(CONFIG_ARCH_OCTEONTX)) { + emm_calb.u = readq(host->base_addr + MIO_EMM_CALB()); + printf("\nMIO_EMM_CALB: 0x%016llx\n", + emm_calb.u); + printf(" 0: start: %u\n", + emm_calb.s.start); + emm_tap.u = readq(host->base_addr + MIO_EMM_TAP()); + printf("\nMIO_EMM_TAP: 0x%016llx\n", + emm_tap.u); + printf(" 7-0: delay: %u\n", emm_tap.s.delay); + emm_timing.u = readq(host->base_addr + MIO_EMM_TIMING()); + printf("\nMIO_EMM_TIMING: 0x%016llx\n", + emm_timing.u); + printf(" 53-48: cmd_in_tap: %u\n", + emm_timing.s.cmd_in_tap); + printf(" 37-32: cmd_out_tap: %u\n", + emm_timing.s.cmd_out_tap); + printf(" 21-16: data_in_tap: %u\n", + emm_timing.s.data_in_tap); + printf(" 5-0: data_out_tap: %u\n", + emm_timing.s.data_out_tap); + io_ctl.u = readq(host->base_addr + MIO_EMM_IO_CTL()); + printf("\nMIO_IO_CTL: 0x%016llx\n", io_ctl.u); + printf(" 3-2: drive: %u (%u mA)\n", + io_ctl.s.drive, 2 << io_ctl.s.drive); + printf(" 0: slew: %u %s\n", io_ctl.s.slew, + io_ctl.s.slew ? "high" : "low"); + emm_debug.u = readq(host->base_addr + MIO_EMM_DEBUG()); + printf("\nMIO_EMM_DEBUG: 0x%016llx\n", + emm_debug.u); + printf(" 21: rdsync_rst 0x%x\n", + emm_debug.s.rdsync_rst); + printf(" 20: emmc_clk_disable 0x%x\n", + emm_debug.s.emmc_clk_disable); + printf(" 19-16: dma_sm: 0x%x\n", + emm_debug.s.dma_sm); + printf(" 15-12: data_sm: 0x%x\n", + emm_debug.s.data_sm); + printf(" 11-8: cmd_sm: 0x%x\n", + emm_debug.s.cmd_sm); + printf(" 0: clk_on: 0x%x\n", + emm_debug.s.clk_on); + } + + puts("\n"); +} + +/** + * Print out all of the register values + * + * @param mmc MMC device + */ +static void octeontx_mmc_print_registers(struct mmc *mmc) +{ +#ifdef DEBUG_REGISTERS + const int print = 1; +#else + const int print = 0; +#endif + if (print) + octeontx_mmc_print_registers2(mmc, mmc_to_host(mmc)); +} + +static const struct octeontx_sd_mods octeontx_cr_types[] = { +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD0 */ +{ {0, 3}, {0, 3}, {0, 0} }, /* CMD1 */ +{ {0, 2}, {0, 2}, {0, 0} }, /* CMD2 */ +{ {0, 1}, {0, 3}, {0, 0} }, /* CMD3 SD_CMD_SEND_RELATIVE_ADDR 0, 2 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD4 */ +{ {0, 1}, {0, 1}, {0, 0} }, /* CMD5 */ +{ {0, 1}, {1, 1}, {0, 1} }, /* + * CMD6 SD_CMD_SWITCH_FUNC 1,0 + * (ACMD) SD_APP_SET_BUS_WIDTH + */ +{ {0, 1}, {0, 1}, {0, 0} }, /* CMD7 */ +{ {1, 1}, {0, 3}, {0, 0} }, /* CMD8 SD_CMD_SEND_IF_COND 1,2 */ +{ {0, 2}, {0, 2}, {0, 0} }, /* CMD9 */ +{ {0, 2}, {0, 2}, {0, 0} }, /* CMD10 */ +{ {1, 1}, {0, 1}, {1, 1} }, /* CMD11 SD_CMD_SWITCH_UHS18V 1,0 */ +{ {0, 1}, {0, 1}, {0, 0} }, /* CMD12 */ +{ {0, 1}, {0, 1}, {1, 3} }, /* CMD13 (ACMD)) SD_CMD_APP_SD_STATUS 1,2 */ +{ {1, 1}, {1, 1}, {0, 0} }, /* CMD14 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD15 */ +{ {0, 1}, {0, 1}, {0, 0} }, /* CMD16 */ +{ {1, 1}, {1, 1}, {0, 0} }, /* CMD17 */ +{ {1, 1}, {1, 1}, {0, 0} }, /* CMD18 */ +{ {3, 1}, {3, 1}, {0, 0} }, /* CMD19 */ +{ {2, 1}, {0, 0}, {0, 0} }, /* CMD20 */ /* SD 2,0 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD21 */ +{ {0, 0}, {0, 0}, {1, 1} }, /* CMD22 (ACMD) SD_APP_SEND_NUM_WR_BLKS 1,0 */ +{ {0, 1}, {0, 1}, {0, 1} }, /* CMD23 */ /* SD ACMD 1,0 */ +{ {2, 1}, {2, 1}, {2, 1} }, /* CMD24 */ +{ {2, 1}, {2, 1}, {2, 1} }, /* CMD25 */ +{ {2, 1}, {2, 1}, {2, 1} }, /* CMD26 */ +{ {2, 1}, {2, 1}, {2, 1} }, /* CMD27 */ +{ {0, 1}, {0, 1}, {0, 1} }, /* CMD28 */ +{ {0, 1}, {0, 1}, {0, 1} }, /* CMD29 */ +{ {1, 1}, {1, 1}, {1, 1} }, /* CMD30 */ +{ {1, 1}, {1, 1}, {1, 1} }, /* CMD31 */ +{ {0, 0}, {0, 1}, {0, 0} }, /* CMD32 SD_CMD_ERASE_WR_BLK_START 0,1 */ +{ {0, 0}, {0, 1}, {0, 0} }, /* CMD33 SD_CMD_ERASE_WR_BLK_END 0,1 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD34 */ +{ {0, 1}, {0, 1}, {0, 1} }, /* CMD35 */ +{ {0, 1}, {0, 1}, {0, 1} }, /* CMD36 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD37 */ +{ {0, 1}, {0, 1}, {0, 1} }, /* CMD38 */ +{ {0, 4}, {0, 4}, {0, 4} }, /* CMD39 */ +{ {0, 5}, {0, 5}, {0, 5} }, /* CMD40 */ +{ {0, 0}, {0, 0}, {0, 3} }, /* CMD41 (ACMD) SD_CMD_APP_SEND_OP_COND 0,3 */ +{ {2, 1}, {2, 1}, {2, 1} }, /* CMD42 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD43 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD44 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD45 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD46 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD47 */ +{ {0, 0}, {1, 0}, {0, 0} }, /* CMD48 SD_CMD_READ_EXTR_SINGLE */ +{ {0, 0}, {2, 0}, {0, 0} }, /* CMD49 SD_CMD_WRITE_EXTR_SINGLE */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD50 */ +{ {0, 0}, {0, 0}, {1, 1} }, /* CMD51 (ACMD) SD_CMD_APP_SEND_SCR 1,1 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD52 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD53 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD54 */ +{ {0, 1}, {0, 1}, {0, 1} }, /* CMD55 */ +{ {0xff, 0xff}, {0xff, 0xff}, {0xff, 0xff} }, /* CMD56 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD57 */ +{ {0, 0}, {0, 3}, {0, 3} }, /* CMD58 SD_CMD_SPI_READ_OCR 0,3 */ +{ {0, 0}, {0, 1}, {0, 0} }, /* CMD59 SD_CMD_SPI_CRC_ON_OFF 0,1 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD60 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD61 */ +{ {0, 0}, {0, 0}, {0, 0} }, /* CMD62 */ +{ {0, 0}, {0, 0}, {0, 0} } /* CMD63 */ +}; + +/** + * Returns XOR values needed for SD commands and other quirks + * + * @param mmc mmc device + * @param cmd command information + * + * @return octeontx_mmc_cr_mods data structure with various quirks and flags + */ +static struct octeontx_mmc_cr_mods +octeontx_mmc_get_cr_mods(struct mmc *mmc, const struct mmc_cmd *cmd, + const struct mmc_data *data) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + struct octeontx_mmc_cr_mods cr = {0, 0}; + const struct octeontx_sd_mods *sdm = + &octeontx_cr_types[cmd->cmdidx & 0x3f]; + u8 c = sdm->mmc.c, r = sdm->mmc.r; + u8 desired_ctype = 0; + + if (IS_MMC(mmc)) { +#ifdef MMC_SUPPORTS_TUNING + if (cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200) { + if (cmd->resp_type == MMC_RSP_R1) + cr.rtype_xor = 1; + if (data && data->flags & MMC_DATA_READ) + cr.ctype_xor = 1; + } +#endif + return cr; + } + + if (cmd->cmdidx == 56) + c = (cmd->cmdarg & 1) ? 1 : 2; + + if (data) { + if (data->flags & MMC_DATA_READ) + desired_ctype = 1; + else if (data->flags & MMC_DATA_WRITE) + desired_ctype = 2; + } + + cr.ctype_xor = c ^ desired_ctype; + if (slot->is_acmd) + cr.rtype_xor = r ^ sdm->sdacmd.r; + else + cr.rtype_xor = r ^ sdm->sd.r; + + debug("%s(%s): mmc c: %d, mmc r: %d, desired c: %d, xor c: %d, xor r: %d\n", + __func__, mmc->dev->name, c, r, desired_ctype, + cr.ctype_xor, cr.rtype_xor); + return cr; +} + +/** + * Keep track of switch commands internally + */ +static void octeontx_mmc_track_switch(struct mmc *mmc, u32 cmd_arg) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + u8 how = (cmd_arg >> 24) & 3; + u8 where = (u8)(cmd_arg >> 16); + u8 val = (u8)(cmd_arg >> 8); + + slot->want_switch = slot->cached_switch; + + if (slot->is_acmd) + return; + + if (how != 3) + return; + + switch (where) { + case EXT_CSD_BUS_WIDTH: + slot->want_switch.s.bus_width = val; + break; + case EXT_CSD_POWER_CLASS: + slot->want_switch.s.power_class = val; + break; + case EXT_CSD_HS_TIMING: + slot->want_switch.s.hs_timing = 0; + slot->want_switch.s.hs200_timing = 0; + slot->want_switch.s.hs400_timing = 0; + switch (val & 0xf) { + case 0: + break; + case 1: + slot->want_switch.s.hs_timing = 1; + break; + case 2: + if (!slot->is_asim && !slot->is_emul) + slot->want_switch.s.hs200_timing = 1; + break; + case 3: + if (!slot->is_asim && !slot->is_emul) + slot->want_switch.s.hs400_timing = 1; + break; + default: + pr_err("%s(%s): Unsupported timing mode 0x%x\n", + __func__, mmc->dev->name, val & 0xf); + break; + } + break; + default: + break; + } +} + +static int octeontx_mmc_print_rsp_errors(struct mmc *mmc, + union mio_emm_rsp_sts rsp_sts) +{ + bool err = false; + const char *name = mmc->dev->name; + + if (rsp_sts.s.acc_timeout) { + pr_warn("%s(%s): acc_timeout\n", __func__, name); + err = true; + } + if (rsp_sts.s.dbuf_err) { + pr_warn("%s(%s): dbuf_err\n", __func__, name); + err = true; + } + if (rsp_sts.s.blk_timeout) { + pr_warn("%s(%s): blk_timeout\n", __func__, name); + err = true; + } + if (rsp_sts.s.blk_crc_err) { + pr_warn("%s(%s): blk_crc_err\n", __func__, name); + err = true; + } + if (rsp_sts.s.stp_timeout) { + pr_warn("%s(%s): stp_timeout\n", __func__, name); + err = true; + } + if (rsp_sts.s.stp_crc_err) { + pr_warn("%s(%s): stp_crc_err\n", __func__, name); + err = true; + } + if (rsp_sts.s.stp_bad_sts) { + pr_warn("%s(%s): stp_bad_sts\n", __func__, name); + err = true; + } + if (err) + pr_warn(" rsp_sts: 0x%llx\n", rsp_sts.u); + + return err ? -1 : 0; +} + +/** + * Starts a DMA operation for block read/write + * + * @param mmc mmc device + * @param write true if write operation + * @param clear true to clear DMA operation + * @param adr source or destination DMA address + * @param size size in blocks + * @param timeout timeout in ms + */ +static void octeontx_mmc_start_dma(struct mmc *mmc, bool write, + bool clear, u32 block, dma_addr_t adr, + u32 size, int timeout) +{ + const struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + union mio_emm_dma_cfg emm_dma_cfg; + union mio_emm_dma_adr emm_dma_adr; + union mio_emm_dma emm_dma; + + /* Clear any interrupts */ + write_csr(mmc, MIO_EMM_DMA_INT(), + read_csr(mmc, MIO_EMM_DMA_INT())); + + emm_dma_cfg.u = 0; + emm_dma_cfg.s.en = 1; + emm_dma_cfg.s.rw = !!write; + emm_dma_cfg.s.clr = !!clear; + emm_dma_cfg.s.size = ((u64)(size * mmc->read_bl_len) / 8) - 1; +#if __BYTE_ORDER != __BIG_ENDIAN + emm_dma_cfg.s.endian = 1; +#endif + emm_dma_adr.u = 0; + emm_dma_adr.s.adr = adr; + write_csr(mmc, MIO_EMM_DMA_ADR(), emm_dma_adr.u); + write_csr(mmc, MIO_EMM_DMA_CFG(), emm_dma_cfg.u); + + emm_dma.u = 0; + emm_dma.s.bus_id = slot->bus_id; + emm_dma.s.dma_val = 1; + emm_dma.s.rw = !!write; + emm_dma.s.sector = mmc->high_capacity ? 1 : 0; + + if (size > 1 && ((IS_SD(mmc) && (mmc->scr[0] & 2)) || !IS_SD(mmc))) + emm_dma.s.multi = 1; + else + emm_dma.s.multi = 0; + + emm_dma.s.block_cnt = size; + if (!mmc->high_capacity) + block *= mmc->read_bl_len; + emm_dma.s.card_addr = block; + debug("%s(%s): card address: 0x%x, size: %d, multi: %d\n", + __func__, mmc->dev->name, block, size, emm_dma.s.multi); + + if (timeout > 0) + timeout = (timeout * 1000) - 1000; + set_wdog(mmc, timeout); + + debug(" Writing 0x%llx to mio_emm_dma\n", emm_dma.u); + write_csr(mmc, MIO_EMM_DMA(), emm_dma.u); +} + +/** + * Waits for a DMA operation to complete + * + * @param mmc mmc device + * @param timeout timeout in ms + * + * @return 0 for success (could be DMA errors), -ETIMEDOUT on timeout + */ + +/** + * Cleanup DMA engine after a failure + * + * @param mmc mmc device + * @param rsp_sts rsp status + */ +static void octeontx_mmc_cleanup_dma(struct mmc *mmc, + union mio_emm_rsp_sts rsp_sts) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + union mio_emm_dma emm_dma; + ulong start; + int retries = 3; + + do { + debug("%s(%s): rsp_sts: 0x%llx, rsp_lo: 0x%llx, dma_int: 0x%llx\n", + __func__, mmc->dev->name, rsp_sts.u, + read_csr(mmc, MIO_EMM_RSP_LO()), + read_csr(mmc, MIO_EMM_DMA_INT())); + emm_dma.u = read_csr(mmc, MIO_EMM_DMA()); + emm_dma.s.dma_val = 1; + emm_dma.s.dat_null = 1; + emm_dma.s.bus_id = slot->bus_id; + write_csr(mmc, MIO_EMM_DMA(), emm_dma.u); + start = get_timer(0); + do { + rsp_sts.u = read_csr(mmc, MIO_EMM_RSP_STS()); + WATCHDOG_RESET(); + } while (get_timer(start) < 100 && + (rsp_sts.s.dma_val || rsp_sts.s.dma_pend)); + } while (retries-- >= 0 && rsp_sts.s.dma_pend); + if (rsp_sts.s.dma_val) + pr_err("%s(%s): Error: could not clean up DMA. RSP_STS: 0x%llx, RSP_LO: 0x%llx\n", + __func__, mmc->dev->name, rsp_sts.u, + read_csr(mmc, MIO_EMM_RSP_LO())); + debug(" rsp_sts after clearing up DMA: 0x%llx\n", + read_csr(mmc, MIO_EMM_RSP_STS())); +} + +/** + * Waits for a DMA operation to complete + * + * @param mmc mmc device + * @param timeout timeout in ms + * @param verbose true to print out error information + * + * @return 0 for success (could be DMA errors), -ETIMEDOUT on timeout + * or -EIO if IO error. + */ +static int octeontx_mmc_wait_dma(struct mmc *mmc, bool write, ulong timeout, + bool verbose) +{ + struct octeontx_mmc_host *host = mmc_to_host(mmc); + ulong start_time = get_timer(0); + union mio_emm_dma_int emm_dma_int; + union mio_emm_rsp_sts rsp_sts; + union mio_emm_dma emm_dma; + bool timed_out = false; + bool err = false; + + debug("%s(%s, %lu, %d), delay: %uus\n", __func__, mmc->dev->name, + timeout, verbose, host->dma_wait_delay); + + udelay(host->dma_wait_delay); + do { + emm_dma_int.u = read_csr(mmc, MIO_EMM_DMA_INT()); + rsp_sts.u = read_csr(mmc, MIO_EMM_RSP_STS()); + if (write) { + if ((rsp_sts.s.dma_pend && !rsp_sts.s.dma_val) || + rsp_sts.s.blk_timeout || + rsp_sts.s.stp_timeout || + rsp_sts.s.rsp_timeout) { + err = true; +#ifdef DEBUG + debug("%s: f1\n", __func__); + octeontx_mmc_print_rsp_errors(mmc, rsp_sts); +#endif + break; + } + } else { + if (rsp_sts.s.blk_crc_err || + (rsp_sts.s.dma_pend && !rsp_sts.s.dma_val)) { + err = true; +#if defined(DEBUG) + octeontx_mmc_print_rsp_errors(mmc, rsp_sts); +#endif + break; + } + } + if (rsp_sts.s.dma_pend) { + /* + * If this is set then an error has occurred. + * Try and restart the DMA operation. + */ + emm_dma.u = read_csr(mmc, MIO_EMM_DMA()); + if (verbose) { + pr_err("%s(%s): DMA pending error: rsp_sts: 0x%llx, dma_int: 0x%llx, emm_dma: 0x%llx\n", + __func__, mmc->dev->name, rsp_sts.u, + emm_dma_int.u, emm_dma.u); + octeontx_print_rsp_sts(mmc); + debug(" MIO_EMM_DEBUG: 0x%llx\n", + read_csr(mmc, MIO_EMM_DEBUG())); + pr_err("%s: Trying DMA resume...\n", __func__); + } + emm_dma.s.dma_val = 1; + emm_dma.s.dat_null = 1; + write_csr(mmc, MIO_EMM_DMA(), emm_dma.u); + udelay(10); + } else if (!rsp_sts.s.dma_val && emm_dma_int.s.done) { + break; + } + WATCHDOG_RESET(); + timed_out = (get_timer(start_time) > timeout); + } while (!timed_out); + + if (timed_out || err) { + if (verbose) { + pr_err("%s(%s): MMC DMA %s after %lu ms, rsp_sts: 0x%llx, dma_int: 0x%llx, rsp_sts_lo: 0x%llx, emm_dma: 0x%llx\n", + __func__, mmc->dev->name, + timed_out ? "timed out" : "error", + get_timer(start_time), rsp_sts.u, + emm_dma_int.u, + read_csr(mmc, MIO_EMM_RSP_LO()), + read_csr(mmc, MIO_EMM_DMA())); + octeontx_print_rsp_sts(mmc); + } + if (rsp_sts.s.dma_pend) + octeontx_mmc_cleanup_dma(mmc, rsp_sts); + } else { + write_csr(mmc, MIO_EMM_DMA_INT(), + read_csr(mmc, MIO_EMM_DMA_INT())); + } + + return timed_out ? -ETIMEDOUT : (err ? -EIO : 0); +} + +/** + * Read blocks from the MMC/SD device + * + * @param mmc mmc device + * @param cmd command + * @param data data for read + * @param verbose true to print out error information + * + * @return number of blocks read or 0 if error + */ +static int octeontx_mmc_read_blocks(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data, bool verbose) +{ + struct octeontx_mmc_host *host = mmc_to_host(mmc); + union mio_emm_rsp_sts rsp_sts; + dma_addr_t dma_addr = (dma_addr_t)dm_pci_virt_to_mem(host->dev, + data->dest); + ulong count; + ulong blkcnt = data->blocks; + ulong start = cmd->cmdarg; + int timeout = 1000 + blkcnt * 20; + bool timed_out = false; + bool multi_xfer = cmd->cmdidx == MMC_CMD_READ_MULTIPLE_BLOCK; + + debug("%s(%s): dest: %p, dma address: 0x%llx, blkcnt: %lu, start: %lu\n", + __func__, mmc->dev->name, data->dest, dma_addr, blkcnt, start); + debug("%s: rsp_sts: 0x%llx\n", __func__, + read_csr(mmc, MIO_EMM_RSP_STS())); + /* use max timeout for multi-block transfers */ + /* timeout = 0; */ + + /* + * If we have a valid SD card in the slot, we set the response bit + * mask to check for CRC errors and timeouts only. + * Otherwise, use the default power on reset value. + */ + write_csr(mmc, MIO_EMM_STS_MASK(), + IS_SD(mmc) ? 0x00b00000ull : 0xe4390080ull); + invalidate_dcache_range((u64)data->dest, + (u64)data->dest + blkcnt * data->blocksize); + + if (multi_xfer) { + octeontx_mmc_start_dma(mmc, false, false, start, dma_addr, + blkcnt, timeout); + timed_out = !!octeontx_mmc_wait_dma(mmc, false, timeout, + verbose); + rsp_sts.u = read_csr(mmc, MIO_EMM_RSP_STS()); + if (timed_out || rsp_sts.s.dma_val || rsp_sts.s.dma_pend) { + if (!verbose) + return 0; + + pr_err("%s(%s): Error: DMA timed out. rsp_sts: 0x%llx, emm_int: 0x%llx, dma_int: 0x%llx, rsp_lo: 0x%llx\n", + __func__, mmc->dev->name, rsp_sts.u, + read_csr(mmc, MIO_EMM_INT()), + read_csr(mmc, MIO_EMM_DMA_INT()), + read_csr(mmc, MIO_EMM_RSP_LO())); + pr_err("%s: block count: %lu, start: 0x%lx\n", + __func__, blkcnt, start); + octeontx_mmc_print_registers(mmc); + return 0; + } + } else { + count = blkcnt; + timeout = 1000; + do { + octeontx_mmc_start_dma(mmc, false, false, start, + dma_addr, 1, timeout); + dma_addr += mmc->read_bl_len; + start++; + + timed_out = !!octeontx_mmc_wait_dma(mmc, false, + timeout, verbose); + rsp_sts.u = read_csr(mmc, MIO_EMM_RSP_STS()); + if (timed_out || rsp_sts.s.dma_val || + rsp_sts.s.dma_pend) { + if (verbose) { + pr_err("%s: Error: DMA timed out. rsp_sts: 0x%llx, emm_int: 0x%llx, dma_int: 0x%llx, rsp_lo: 0x%llx\n", + __func__, rsp_sts.u, + read_csr(mmc, MIO_EMM_INT()), + read_csr(mmc, MIO_EMM_DMA_INT()), + read_csr(mmc, MIO_EMM_RSP_LO())); + pr_err("%s: block count: 1, start: 0x%lx\n", + __func__, start); + octeontx_mmc_print_registers(mmc); + } + return blkcnt - count; + } + WATCHDOG_RESET(); + } while (--count); + } +#ifdef DEBUG + debug("%s(%s): Read %lu (0x%lx) blocks starting at block %u (0x%x) to address %p (dma address 0x%llx)\n", + __func__, mmc->dev->name, blkcnt, blkcnt, + cmd->cmdarg, cmd->cmdarg, data->dest, + dm_pci_virt_to_mem(host->dev, data->dest)); + print_buffer(0, data->dest, 1, 0x200, 0); +#endif + return blkcnt; +} + +static int octeontx_mmc_poll_ready(struct mmc *mmc, ulong timeout) +{ + ulong start; + struct mmc_cmd cmd; + int err; + bool not_ready = false; + + memset(&cmd, 0, sizeof(cmd)); + cmd.cmdidx = MMC_CMD_SEND_STATUS; + cmd.cmdarg = mmc->rca << 16; + cmd.resp_type = MMC_RSP_R1; + start = get_timer(0); + do { + err = octeontx_mmc_send_cmd(mmc, &cmd, NULL); + if (err) { + pr_err("%s(%s): MMC command error: %d; Retry...\n", + __func__, mmc->dev->name, err); + not_ready = true; + } else if (cmd.response[0] & R1_READY_FOR_DATA) { + return 0; + } + WATCHDOG_RESET(); + } while (get_timer(start) < timeout); + + if (not_ready) + pr_err("%s(%s): MMC command error; Retry timeout\n", + __func__, mmc->dev->name); + return -ETIMEDOUT; +} + +static ulong octeontx_mmc_write_blocks(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data) +{ + struct octeontx_mmc_host *host = mmc_to_host(mmc); + ulong start = cmd->cmdarg; + ulong blkcnt = data->blocks; + dma_addr_t dma_addr; + union mio_emm_rsp_sts rsp_sts; + union mio_emm_sts_mask emm_sts_mask; + ulong timeout; + int count; + bool timed_out = false; + bool multi_xfer = (blkcnt > 1) && + ((IS_SD(mmc) && mmc->scr[0] & 2) || !IS_SD(mmc)); + + octeontx_mmc_switch_to(mmc); + emm_sts_mask.u = 0; + emm_sts_mask.s.sts_msk = R1_BLOCK_WRITE_MASK; + write_csr(mmc, MIO_EMM_STS_MASK(), emm_sts_mask.u); + + if (octeontx_mmc_poll_ready(mmc, 10000)) { + pr_err("%s(%s): Ready timed out\n", __func__, mmc->dev->name); + return 0; + } + flush_dcache_range((u64)data->src, + (u64)data->src + blkcnt * mmc->write_bl_len); + dma_addr = (u64)dm_pci_virt_to_mem(host->dev, (void *)data->src); + if (multi_xfer) { + timeout = 5000 + 100 * blkcnt; + octeontx_mmc_start_dma(mmc, true, false, start, dma_addr, + blkcnt, timeout); + timed_out = !!octeontx_mmc_wait_dma(mmc, true, timeout, true); + rsp_sts.u = read_csr(mmc, MIO_EMM_RSP_STS()); + if (timed_out || rsp_sts.s.dma_val || rsp_sts.s.dma_pend) { + pr_err("%s(%s): Error: multi-DMA timed out after %lums. rsp_sts: 0x%llx, emm_int: 0x%llx, emm_dma_int: 0x%llx, rsp_sts_lo: 0x%llx, emm_dma: 0x%llx\n", + __func__, mmc->dev->name, timeout, + rsp_sts.u, + read_csr(mmc, MIO_EMM_INT()), + read_csr(mmc, MIO_EMM_DMA_INT()), + read_csr(mmc, MIO_EMM_RSP_LO()), + read_csr(mmc, MIO_EMM_DMA())); + return 0; + } + } else { + timeout = 5000; + count = blkcnt; + do { + octeontx_mmc_start_dma(mmc, true, false, start, + dma_addr, 1, timeout); + dma_addr += mmc->read_bl_len; + start++; + + timed_out = !!octeontx_mmc_wait_dma(mmc, true, timeout, + true); + rsp_sts.u = read_csr(mmc, MIO_EMM_RSP_STS()); + if (timed_out || rsp_sts.s.dma_val || + rsp_sts.s.dma_pend) { + pr_err("%s(%s): Error: single-DMA timed out after %lums. rsp_sts: 0x%llx, emm_int: 0x%llx, emm_dma_int: 0x%llx, rsp_sts_lo: 0x%llx, emm_dma: 0x%llx\n", + __func__, mmc->dev->name, timeout, + rsp_sts.u, + read_csr(mmc, MIO_EMM_RSP_STS()), + read_csr(mmc, MIO_EMM_DMA_INT()), + read_csr(mmc, MIO_EMM_RSP_LO()), + read_csr(mmc, MIO_EMM_DMA())); + return blkcnt - count; + } + WATCHDOG_RESET(); + } while (--count); + } + + return blkcnt; +} + +/** + * Send a command to the eMMC/SD device + * + * @param mmc mmc device + * @param cmd cmd to send and response + * @param data additional data + * @param flags + * @return 0 for success, otherwise error + */ +static int octeontx_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + const char *name = slot->dev->name; + struct octeontx_mmc_cr_mods mods = {0, 0}; + union mio_emm_rsp_sts rsp_sts; + union mio_emm_cmd emm_cmd; + union mio_emm_rsp_lo rsp_lo; + union mio_emm_buf_idx emm_buf_idx; + union mio_emm_buf_dat emm_buf_dat; + ulong start; + int i; + ulong blkcnt; + + /** + * This constant has a 1 bit for each command which should have a short + * timeout and a 0 for each bit with a long timeout. Currently the + * following commands have a long timeout: + * CMD6, CMD17, CMD18, CMD24, CMD25, CMD32, CMD33, CMD35, CMD36 and + * CMD38. + */ + static const u64 timeout_short = 0xFFFFFFA4FCF9FFDFull; + uint timeout; + + if (cmd->cmdidx == MMC_CMD_SEND_EXT_CSD) { + union mio_emm_rca emm_rca; + + emm_rca.u = 0; + emm_rca.s.card_rca = mmc->rca; + write_csr(mmc, MIO_EMM_RCA(), emm_rca.u); + } + + if (timeout_short & (1ull << cmd->cmdidx)) + timeout = MMC_TIMEOUT_SHORT; + else if (cmd->cmdidx == MMC_CMD_SWITCH && IS_SD(mmc)) + timeout = 2560; + else if (cmd->cmdidx == MMC_CMD_ERASE) + timeout = MMC_TIMEOUT_ERASE; + else + timeout = MMC_TIMEOUT_LONG; + + debug("%s(%s): cmd idx: %u, arg: 0x%x, resp type: 0x%x, timeout: %u\n", + __func__, name, cmd->cmdidx, cmd->cmdarg, cmd->resp_type, + timeout); + if (data) + debug(" data: addr: %p, flags: 0x%x, blocks: %u, blocksize: %u\n", + data->dest, data->flags, data->blocks, data->blocksize); + + octeontx_mmc_switch_to(mmc); + + /* Clear any interrupts */ + write_csr(mmc, MIO_EMM_INT(), read_csr(mmc, MIO_EMM_INT())); + + /* + * We need to override the default command types and response types + * when dealing with SD cards. + */ + mods = octeontx_mmc_get_cr_mods(mmc, cmd, data); + + /* Handle block read/write/stop operations */ + switch (cmd->cmdidx) { + case MMC_CMD_GO_IDLE_STATE: + slot->tuned = false; + slot->hs200_tuned = false; + slot->hs400_tuned = false; + break; + case MMC_CMD_STOP_TRANSMISSION: + return 0; + case MMC_CMD_READ_MULTIPLE_BLOCK: + case MMC_CMD_READ_SINGLE_BLOCK: + pr_debug("%s(%s): Reading blocks\n", __func__, name); + blkcnt = octeontx_mmc_read_blocks(mmc, cmd, data, true); + return (blkcnt > 0) ? 0 : -1; + case MMC_CMD_WRITE_MULTIPLE_BLOCK: + case MMC_CMD_WRITE_SINGLE_BLOCK: + blkcnt = octeontx_mmc_write_blocks(mmc, cmd, data); + return (blkcnt > 0) ? 0 : -1; + case MMC_CMD_SELECT_CARD: + /* Set the RCA register (is it set automatically?) */ + if (IS_SD(mmc)) { + union mio_emm_rca emm_rca; + + emm_rca.u = 0; + emm_rca.s.card_rca = (cmd->cmdarg >> 16); + write_csr(mmc, MIO_EMM_RCA(), emm_rca.u); + debug("%s: Set SD relative address (RCA) to 0x%x\n", + __func__, emm_rca.s.card_rca); + } + break; + + case MMC_CMD_SWITCH: + if (!data && !slot->is_acmd) + octeontx_mmc_track_switch(mmc, cmd->cmdarg); + break; + } + + emm_cmd.u = 0; + emm_cmd.s.cmd_val = 1; + emm_cmd.s.bus_id = slot->bus_id; + emm_cmd.s.cmd_idx = cmd->cmdidx; + emm_cmd.s.arg = cmd->cmdarg; + emm_cmd.s.ctype_xor = mods.ctype_xor; + emm_cmd.s.rtype_xor = mods.rtype_xor; + if (data && data->blocks == 1 && data->blocksize != 512) { + emm_cmd.s.offset = + 64 - ((data->blocks * data->blocksize) / 8); + debug("%s: offset set to %u\n", __func__, emm_cmd.s.offset); + } + + if (data && data->flags & MMC_DATA_WRITE) { + u8 *src = (u8 *)data->src; + + if (!src) { + pr_err("%s(%s): Error: data source for cmd 0x%x is NULL!\n", + __func__, name, cmd->cmdidx); + return -1; + } + if (data->blocksize > 512) { + pr_err("%s(%s): Error: data for cmd 0x%x exceeds 512 bytes\n", + __func__, name, cmd->cmdidx); + return -1; + } +#ifdef DEBUG + debug("%s: Sending %d bytes data\n", __func__, data->blocksize); + print_buffer(0, src, 1, data->blocksize, 0); +#endif + emm_buf_idx.u = 0; + emm_buf_idx.s.inc = 1; + write_csr(mmc, MIO_EMM_BUF_IDX(), emm_buf_idx.u); + for (i = 0; i < (data->blocksize + 7) / 8; i++) { + memcpy(&emm_buf_dat.u, src, sizeof(emm_buf_dat.u)); + write_csr(mmc, MIO_EMM_BUF_DAT(), + cpu_to_be64(emm_buf_dat.u)); + src += sizeof(emm_buf_dat.u); + } + write_csr(mmc, MIO_EMM_BUF_IDX(), 0); + } + debug("%s(%s): Sending command %u (emm_cmd: 0x%llx)\n", __func__, + name, cmd->cmdidx, emm_cmd.u); + set_wdog(mmc, timeout * 1000); + write_csr(mmc, MIO_EMM_CMD(), emm_cmd.u); + + /* Wait for command to finish or time out */ + start = get_timer(0); + do { + rsp_sts.u = read_csr(mmc, MIO_EMM_RSP_STS()); + WATCHDOG_RESET(); + } while (!rsp_sts.s.cmd_done && !rsp_sts.s.rsp_timeout && + (get_timer(start) < timeout + 10)); + octeontx_mmc_print_rsp_errors(mmc, rsp_sts); + if (rsp_sts.s.rsp_timeout || !rsp_sts.s.cmd_done) { + debug("%s(%s): Error: command %u(0x%x) timed out. rsp_sts: 0x%llx\n", + __func__, name, cmd->cmdidx, cmd->cmdarg, rsp_sts.u); + octeontx_mmc_print_registers(mmc); + return -ETIMEDOUT; + } + if (rsp_sts.s.rsp_crc_err) { + debug("%s(%s): RSP CRC error, rsp_sts: 0x%llx, cmdidx: %u, arg: 0x%08x\n", + __func__, name, rsp_sts.u, cmd->cmdidx, cmd->cmdarg); + octeontx_mmc_print_registers(mmc); + return -1; + } + if (slot->bus_id != rsp_sts.s.bus_id) { + pr_warn("%s(%s): bus id mismatch, got %d, expected %d for command 0x%x(0x%x)\n", + __func__, name, + rsp_sts.s.bus_id, slot->bus_id, + cmd->cmdidx, cmd->cmdarg); + goto error; + } + if (rsp_sts.s.rsp_bad_sts) { + rsp_lo.u = read_csr(mmc, MIO_EMM_RSP_LO()); + debug("%s: Bad response for bus id %d, cmd id %d:\n" + " rsp_timeout: %d\n" + " rsp_bad_sts: %d\n" + " rsp_crc_err: %d\n", + __func__, slot->bus_id, cmd->cmdidx, + rsp_sts.s.rsp_timeout, + rsp_sts.s.rsp_bad_sts, + rsp_sts.s.rsp_crc_err); + if (rsp_sts.s.rsp_type == 1 && rsp_sts.s.rsp_bad_sts) { + debug(" Response status: 0x%llx\n", + (rsp_lo.u >> 8) & 0xffffffff); +#ifdef DEBUG + mmc_print_status((rsp_lo.u >> 8) & 0xffffffff); +#endif + } + goto error; + } + if (rsp_sts.s.cmd_idx != cmd->cmdidx) { + debug("%s(%s): Command response index %d does not match command index %d\n", + __func__, name, rsp_sts.s.cmd_idx, cmd->cmdidx); + octeontx_print_rsp_sts(mmc); + debug("%s: rsp_lo: 0x%llx\n", __func__, + read_csr(mmc, MIO_EMM_RSP_LO())); + + goto error; + } + + slot->is_acmd = (cmd->cmdidx == MMC_CMD_APP_CMD); + + if (!cmd->resp_type & MMC_RSP_PRESENT) + debug(" Response type: 0x%x, no response expected\n", + cmd->resp_type); + /* Get the response if present */ + if (rsp_sts.s.rsp_val && (cmd->resp_type & MMC_RSP_PRESENT)) { + union mio_emm_rsp_hi rsp_hi; + + rsp_lo.u = read_csr(mmc, MIO_EMM_RSP_LO()); + + switch (rsp_sts.s.rsp_type) { + case 1: + case 3: + case 4: + case 5: + cmd->response[0] = (rsp_lo.u >> 8) & 0xffffffffull; + debug(" response: 0x%08x\n", + cmd->response[0]); + cmd->response[1] = 0; + cmd->response[2] = 0; + cmd->response[3] = 0; + break; + case 2: + cmd->response[3] = rsp_lo.u & 0xffffffff; + cmd->response[2] = (rsp_lo.u >> 32) & 0xffffffff; + rsp_hi.u = read_csr(mmc, MIO_EMM_RSP_HI()); + cmd->response[1] = rsp_hi.u & 0xffffffff; + cmd->response[0] = (rsp_hi.u >> 32) & 0xffffffff; + debug(" response: 0x%08x 0x%08x 0x%08x 0x%08x\n", + cmd->response[0], cmd->response[1], + cmd->response[2], cmd->response[3]); + break; + default: + pr_err("%s(%s): Unknown response type 0x%x for command %d, arg: 0x%x, rsp_sts: 0x%llx\n", + __func__, name, rsp_sts.s.rsp_type, cmd->cmdidx, + cmd->cmdarg, rsp_sts.u); + return -1; + } + } else { + debug(" Response not expected\n"); + } + + if (data && data->flags & MMC_DATA_READ) { + u8 *dest = (u8 *)data->dest; + + if (!dest) { + pr_err("%s(%s): Error, destination buffer NULL!\n", + __func__, mmc->dev->name); + goto error; + } + if (data->blocksize > 512) { + printf("%s(%s): Error: data size %u exceeds 512\n", + __func__, mmc->dev->name, + data->blocksize); + goto error; + } + emm_buf_idx.u = 0; + emm_buf_idx.s.inc = 1; + write_csr(mmc, MIO_EMM_BUF_IDX(), emm_buf_idx.u); + for (i = 0; i < (data->blocksize + 7) / 8; i++) { + emm_buf_dat.u = read_csr(mmc, MIO_EMM_BUF_DAT()); + emm_buf_dat.u = be64_to_cpu(emm_buf_dat.u); + memcpy(dest, &emm_buf_dat.u, sizeof(emm_buf_dat.u)); + dest += sizeof(emm_buf_dat.u); + } + write_csr(mmc, MIO_EMM_BUF_IDX(), 0); +#ifdef DEBUG + debug("%s: Received %d bytes data\n", __func__, + data->blocksize); + print_buffer(0, data->dest, 1, data->blocksize, 0); +#endif + } + + return 0; +error: +#ifdef DEBUG + octeontx_mmc_print_registers(mmc); +#endif + return -1; +} + +static int octeontx_mmc_dev_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, + struct mmc_data *data) +{ + return octeontx_mmc_send_cmd(dev_to_mmc(dev), cmd, data); +} + +#ifdef MMC_SUPPORTS_TUNING +static int octeontx_mmc_test_cmd(struct mmc *mmc, u32 opcode, int *statp) +{ + struct mmc_cmd cmd; + int err; + + memset(&cmd, 0, sizeof(cmd)); + + debug("%s(%s, %u, %p)\n", __func__, mmc->dev->name, opcode, statp); + cmd.cmdidx = opcode; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = mmc->rca << 16; + + err = octeontx_mmc_send_cmd(mmc, &cmd, NULL); + if (err) + debug("%s(%s, %u) returned %d\n", __func__, + mmc->dev->name, opcode, err); + if (statp) + *statp = cmd.response[0]; + return err; +} + +static int octeontx_mmc_test_get_ext_csd(struct mmc *mmc, u32 opcode, + int *statp) +{ + struct mmc_cmd cmd; + struct mmc_data data; + int err; + u8 ext_csd[MMC_MAX_BLOCK_LEN]; + + debug("%s(%s, %u, %p)\n", __func__, mmc->dev->name, opcode, statp); + memset(&cmd, 0, sizeof(cmd)); + + cmd.cmdidx = MMC_CMD_SEND_EXT_CSD; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = 0; + + data.dest = (char *)ext_csd; + data.blocks = 1; + data.blocksize = MMC_MAX_BLOCK_LEN; + data.flags = MMC_DATA_READ; + + err = octeontx_mmc_send_cmd(mmc, &cmd, &data); + if (statp) + *statp = cmd.response[0]; + + return err; +} + +/** + * Wrapper to set the MIO_EMM_TIMING register + * + * @param mmc pointer to mmc data structure + * @param emm_timing New emm_timing register value + * + * On some devices it is possible that changing the data out value can + * cause a glitch on an internal fifo. This works around this problem + * by performing a soft-reset immediately before setting the timing register. + * + * Note: this function should not be called from any function that + * performs DMA or block operations since not all registers are + * preserved. + */ +static void octeontx_mmc_set_emm_timing(struct mmc *mmc, + union mio_emm_timing emm_timing) +{ + union mio_emm_cfg emm_cfg; + struct octeontx_mmc_slot *slot = mmc->priv; + union mio_emm_debug emm_debug; + + debug("%s(%s, 0x%llx) din: %u\n", __func__, mmc->dev->name, + emm_timing.u, emm_timing.s.data_in_tap); + + udelay(1); + if (slot->host->tap_requires_noclk) { + /* Turn off the clock */ + emm_debug.u = read_csr(mmc, MIO_EMM_DEBUG()); + emm_debug.s.emmc_clk_disable = 1; + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + udelay(1); + emm_debug.s.rdsync_rst = 1; + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + } + emm_cfg.u = read_csr(mmc, MIO_EMM_CFG()); + emm_cfg.s.bus_ena = 1 << 3; + write_csr(mmc, MIO_EMM_CFG(), emm_cfg.u); + + udelay(1); + write_csr(mmc, MIO_EMM_TIMING(), emm_timing.u); + udelay(1); + + if (slot->host->tap_requires_noclk) { + /* Turn on the clock */ + emm_debug.s.rdsync_rst = 0; + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + udelay(1); + emm_debug.s.emmc_clk_disable = 0; + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + udelay(1); + } + emm_cfg.s.bus_ena = 1 << mmc_to_slot(mmc)->bus_id; + write_csr(mmc, MIO_EMM_CFG(), emm_cfg.u); +} + +static const u8 octeontx_hs400_tuning_block[512] = { + 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00, + 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc, + 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff, + 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff, + 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd, + 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb, + 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff, + 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff, + 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, + 0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, + 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, + 0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, + 0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, + 0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, + 0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, + 0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, + 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00, + 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc, + 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff, + 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff, + 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd, + 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb, + 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff, + 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff, + 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, + 0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, + 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, + 0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, + 0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, + 0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, + 0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, + 0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, + 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00, + 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc, + 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff, + 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff, + 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd, + 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb, + 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff, + 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff, + 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, + 0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, + 0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, + 0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, + 0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, + 0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, + 0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, + 0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, + 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0xff, 0x00, + 0x00, 0xff, 0x00, 0xff, 0x55, 0xaa, 0x55, 0xaa, + 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff, + 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff, + 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd, + 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb, + 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff, + 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff, + 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, + 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, + 0x01, 0xfe, 0x01, 0xfe, 0xcc, 0xcc, 0xcc, 0xff, + 0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, + 0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, + 0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, + 0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, + 0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, + +}; + +/** + * Perform tuning in HS400 mode + * + * @param[in] mmc mmc data structure + * + * @ret 0 for success, otherwise error + */ +static int octeontx_tune_hs400(struct mmc *mmc) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + struct mmc_cmd cmd; + struct mmc_data data; + union mio_emm_timing emm_timing; + u8 buffer[mmc->read_bl_len]; + int tap_adj; + int err = -1; + int tap; + int run = 0; + int start_run = -1; + int best_run = 0; + int best_start = -1; + bool prev_ok = false; + char env_name[64]; + char how[MAX_NO_OF_TAPS + 1] = ""; + + if (slot->hs400_tuning_block == -1) + return 0; + + /* The eMMC standard disables all tuning support when operating in + * DDR modes like HS400. The problem with this is that there are + * many cases where the HS200 tuning does not work for HS400 mode. + * In order to perform this tuning, while in HS200 a block is written + * to a block specified in the device tree (marvell,hs400-tuning-block) + * which is used for tuning in this function by repeatedly reading + * this block and comparing the data and return code. This function + * chooses the data input tap in the middle of the longest run of + * successful read operations. + */ + + emm_timing = slot->hs200_taps; + debug("%s(%s): Start ci: %d, co: %d, di: %d, do: %d\n", + __func__, mmc->dev->name, emm_timing.s.cmd_in_tap, + emm_timing.s.cmd_out_tap, emm_timing.s.data_in_tap, + emm_timing.s.data_out_tap); + memset(buffer, 0xdb, sizeof(buffer)); + + snprintf(env_name, sizeof(env_name), "emmc%d_data_in_tap_hs400", + slot->bus_id); + tap = env_get_ulong(env_name, 10, -1L); + if (tap >= 0 && tap < MAX_NO_OF_TAPS) { + printf("Overriding data input tap for HS400 mode to %d\n", tap); + emm_timing.s.data_in_tap = tap; + octeontx_mmc_set_emm_timing(mmc, emm_timing); + return 0; + } + + for (tap = 0; tap <= MAX_NO_OF_TAPS; tap++, prev_ok = !err) { + if (tap < MAX_NO_OF_TAPS) { + debug("%s: Testing data in tap %d\n", __func__, tap); + emm_timing.s.data_in_tap = tap; + octeontx_mmc_set_emm_timing(mmc, emm_timing); + + cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK; + cmd.cmdarg = slot->hs400_tuning_block; + cmd.resp_type = MMC_RSP_R1; + data.dest = (void *)buffer; + data.blocks = 1; + data.blocksize = mmc->read_bl_len; + data.flags = MMC_DATA_READ; + err = !octeontx_mmc_read_blocks(mmc, &cmd, &data, + false); + if (err || memcmp(buffer, octeontx_hs400_tuning_block, + sizeof(buffer))) { +#ifdef DEBUG + if (!err) { + debug("%s: data mismatch. Read:\n", + __func__); + print_buffer(0, buffer, 1, + sizeof(buffer), 0); + debug("\nExpected:\n"); + print_buffer(0, + octeontx_hs400_tuning_block, 1, + sizeof(octeontx_hs400_tuning_block), + 0); + } else { + debug("%s: Error %d reading block\n", + __func__, err); + } +#endif + err = -EINVAL; + } else { + debug("%s: tap %d good\n", __func__, tap); + } + how[tap] = "-+"[!err]; + } else { + err = -EINVAL; + } + + if (!err) { + if (!prev_ok) + start_run = tap; + } else if (prev_ok) { + run = tap - 1 - start_run; + if (start_run >= 0 && run > best_run) { + best_start = start_run; + best_run = run; + } + } + } + + how[tap - 1] = '\0'; + if (best_start < 0) { + printf("%s(%s): %lldMHz tuning failed for HS400\n", + __func__, mmc->dev->name, slot->clock / 1000000); + return -EINVAL; + } + tap = best_start + best_run / 2; + + snprintf(env_name, sizeof(env_name), "emmc%d_data_in_tap_adj_hs400", + slot->bus_id); + tap_adj = env_get_ulong(env_name, 10, slot->hs400_tap_adj); + /* + * Keep it in range and if out of range force it back in with a small + * buffer. + */ + if (best_run > 3) { + tap = tap + tap_adj; + if (tap >= best_start + best_run) + tap = best_start + best_run - 2; + if (tap <= best_start) + tap = best_start + 2; + } + how[tap] = '@'; + debug("Tuning: %s\n", how); + debug("%s(%s): HS400 tap: best run start: %d, length: %d, tap: %d\n", + __func__, mmc->dev->name, best_start, best_run, tap); + slot->hs400_taps = slot->hs200_taps; + slot->hs400_taps.s.data_in_tap = tap; + slot->hs400_tuned = true; + if (env_get_yesno("emmc_export_hs400_taps") > 0) { + debug("%s(%s): Exporting HS400 taps\n", + __func__, mmc->dev->name); + env_set_ulong("emmc_timing_tap", slot->host->timing_taps); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs400_data_in_tap_debug", + slot->bus_id); + env_set(env_name, how); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs400_data_in_tap_val", + slot->bus_id); + env_set_ulong(env_name, tap); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs400_data_in_tap_start", + slot->bus_id); + env_set_ulong(env_name, best_start); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs400_data_in_tap_end", + slot->bus_id); + env_set_ulong(env_name, best_start + best_run); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs400_cmd_in_tap", + slot->bus_id); + env_set_ulong(env_name, slot->hs400_taps.s.cmd_in_tap); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs400_cmd_out_tap", + slot->bus_id); + env_set_ulong(env_name, slot->hs400_taps.s.cmd_out_tap); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs400_cmd_out_delay", + slot->bus_id); + env_set_ulong(env_name, slot->cmd_out_hs400_delay); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs400_data_out_tap", + slot->bus_id); + env_set_ulong(env_name, slot->hs400_taps.s.data_out_tap); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs400_data_out_delay", + slot->bus_id); + env_set_ulong(env_name, slot->data_out_hs400_delay); + } else { + debug("%s(%s): HS400 environment export disabled\n", + __func__, mmc->dev->name); + } + octeontx_mmc_set_timing(mmc); + + return 0; +} + +struct adj { + const char *name; + u8 mask_shift; + int (*test)(struct mmc *mmc, u32 opcode, int *error); + u32 opcode; + bool ddr_only; + bool hs200_only; + bool not_hs200_only; + u8 num_runs; +}; + +struct adj adj[] = { + { "CMD_IN", 48, octeontx_mmc_test_cmd, MMC_CMD_SEND_STATUS, + false, false, false, 2, }, +/* { "CMD_OUT", 32, octeontx_mmc_test_cmd, MMC_CMD_SEND_STATUS, },*/ + { "DATA_IN(HS200)", 16, mmc_send_tuning, + MMC_CMD_SEND_TUNING_BLOCK_HS200, false, true, false, 2, }, + { "DATA_IN", 16, octeontx_mmc_test_get_ext_csd, 0, false, false, + true, 2, }, +/* { "DATA_OUT", 0, octeontx_mmc_test_cmd, 0, true, false},*/ + { NULL, }, +}; + +/** + * Perform tuning tests to find optimal timing + * + * @param mmc mmc device + * @param adj parameter to tune + * @param opcode command opcode to use + * + * @return 0 for success, -1 if tuning failed + */ +static int octeontx_mmc_adjust_tuning(struct mmc *mmc, struct adj *adj, + u32 opcode) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + union mio_emm_timing timing; + union mio_emm_debug emm_debug; + int tap; + int err = -1; + int run = 0; + int count; + int start_run = -1; + int best_run = 0; + int best_start = -1; + bool prev_ok = false; + u64 tap_status = 0; + const int tap_adj = slot->hs200_tap_adj; + char how[MAX_NO_OF_TAPS + 1] = ""; + bool is_hs200 = mmc->selected_mode == MMC_HS_200; + + debug("%s(%s, %s, %d), hs200: %d\n", __func__, mmc->dev->name, + adj->name, opcode, is_hs200); + octeontx_mmc_set_emm_timing(mmc, + is_hs200 ? slot->hs200_taps : slot->taps); + +#ifdef DEBUG + if (opcode == MMC_CMD_SEND_TUNING_BLOCK_HS200) { + printf("%s(%s): Before tuning %s, opcode: %d\n", + __func__, mmc->dev->name, adj->name, opcode); + octeontx_mmc_print_registers2(mmc, NULL); + } +#endif + + /* + * The algorithm to find the optimal timing is to start + * at the end and work backwards and select the second + * value that passes. Each test is repeated twice. + */ + for (tap = 0; tap <= MAX_NO_OF_TAPS; tap++, prev_ok = !err) { + if (tap < MAX_NO_OF_TAPS) { + if (slot->host->tap_requires_noclk) { + /* Turn off the clock */ + emm_debug.u = read_csr(mmc, MIO_EMM_DEBUG()); + emm_debug.s.emmc_clk_disable = 1; + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + udelay(1); + emm_debug.s.rdsync_rst = 1; + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + udelay(1); + } + + timing.u = read_csr(mmc, MIO_EMM_TIMING()); + timing.u &= ~(0x3full << adj->mask_shift); + timing.u |= (u64)tap << adj->mask_shift; + write_csr(mmc, MIO_EMM_TIMING(), timing.u); + debug("%s(%s): Testing ci: %d, co: %d, di: %d, do: %d\n", + __func__, mmc->dev->name, timing.s.cmd_in_tap, + timing.s.cmd_out_tap, timing.s.data_in_tap, + timing.s.data_out_tap); + + if (slot->host->tap_requires_noclk) { + /* Turn off the clock */ + emm_debug.s.rdsync_rst = 0; + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + udelay(1); + emm_debug.u = read_csr(mmc, MIO_EMM_DEBUG()); + emm_debug.s.emmc_clk_disable = 0; + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + udelay(1); + } + for (count = 0; count < 2; count++) { + err = adj->test(mmc, opcode, NULL); + if (err) { + debug("%s(%s, %s): tap %d failed, count: %d, rsp_sts: 0x%llx, rsp_lo: 0x%llx\n", + __func__, mmc->dev->name, + adj->name, tap, count, + read_csr(mmc, + MIO_EMM_RSP_STS()), + read_csr(mmc, + MIO_EMM_RSP_LO())); + debug("%s(%s, %s): tap: %d, do: %d, di: %d, co: %d, ci: %d\n", + __func__, mmc->dev->name, + adj->name, tap, + timing.s.data_out_tap, + timing.s.data_in_tap, + timing.s.cmd_out_tap, + timing.s.cmd_in_tap); + break; + } + debug("%s(%s, %s): tap %d passed, count: %d, rsp_sts: 0x%llx, rsp_lo: 0x%llx\n", + __func__, mmc->dev->name, adj->name, tap, + count, + read_csr(mmc, MIO_EMM_RSP_STS()), + read_csr(mmc, MIO_EMM_RSP_LO())); + } + tap_status |= (u64)(!err) << tap; + how[tap] = "-+"[!err]; + } else { + /* + * Putting the end+1 case in the loop simplifies + * logic, allowing 'prev_ok' to process a sweet + * spot in tuning which extends to the wall. + */ + err = -EINVAL; + } + if (!err) { + /* + * If no CRC/etc errors in the response, but previous + * failed, note the start of a new run. + */ + debug(" prev_ok: %d\n", prev_ok); + if (!prev_ok) + start_run = tap; + } else if (prev_ok) { + run = tap - 1 - start_run; + /* did we just exit a wider sweet spot? */ + if (start_run >= 0 && run > best_run) { + best_start = start_run; + best_run = run; + } + } + } + how[tap - 1] = '\0'; + if (best_start < 0) { + printf("%s(%s, %s): %lldMHz tuning %s failed\n", __func__, + mmc->dev->name, adj->name, slot->clock / 1000000, + adj->name); + return -EINVAL; + } + + tap = best_start + best_run / 2; + debug(" tap %d is center, start: %d, run: %d\n", tap, + best_start, best_run); + if (is_hs200) { + slot->hs200_taps.u &= ~(0x3full << adj->mask_shift); + slot->hs200_taps.u |= (u64)tap << adj->mask_shift; + } else { + slot->taps.u &= ~(0x3full << adj->mask_shift); + slot->taps.u |= (u64)tap << adj->mask_shift; + } + if (best_start < 0) { + printf("%s(%s, %s): %lldMHz tuning %s failed\n", __func__, + mmc->dev->name, adj->name, slot->clock / 1000000, + adj->name); + return -EINVAL; + } + + tap = best_start + best_run / 2; + if (is_hs200 && (tap + tap_adj >= 0) && (tap + tap_adj < 64) && + tap_status & (1ULL << (tap + tap_adj))) { + debug("Adjusting tap from %d by %d to %d\n", + tap, tap_adj, tap + tap_adj); + tap += tap_adj; + } + how[tap] = '@'; + debug("%s/%s %d/%d/%d %s\n", mmc->dev->name, + adj->name, best_start, tap, best_start + best_run, how); + + if (is_hs200) { + slot->hs200_taps.u &= ~(0x3full << adj->mask_shift); + slot->hs200_taps.u |= (u64)tap << adj->mask_shift; + } else { + slot->taps.u &= ~(0x3full << adj->mask_shift); + slot->taps.u |= (u64)tap << adj->mask_shift; + } + +#ifdef DEBUG + if (opcode == MMC_CMD_SEND_TUNING_BLOCK_HS200) { + debug("%s(%s, %s): After successful tuning\n", + __func__, mmc->dev->name, adj->name); + debug("%s(%s, %s): tap: %d, new do: %d, di: %d, co: %d, ci: %d\n", + __func__, mmc->dev->name, adj->name, tap, + slot->taps.s.data_out_tap, + slot->taps.s.data_in_tap, + slot->taps.s.cmd_out_tap, + slot->taps.s.cmd_in_tap); + debug("%s(%s, %s): tap: %d, new do HS200: %d, di: %d, co: %d, ci: %d\n", + __func__, mmc->dev->name, adj->name, tap, + slot->hs200_taps.s.data_out_tap, + slot->hs200_taps.s.data_in_tap, + slot->hs200_taps.s.cmd_out_tap, + slot->hs200_taps.s.cmd_in_tap); + } +#endif + octeontx_mmc_set_timing(mmc); + + if (is_hs200 && env_get_yesno("emmc_export_hs200_taps")) { + char env_name[64]; + + env_set_ulong("emmc_timing_tap", slot->host->timing_taps); + switch (opcode) { + case MMC_CMD_SEND_TUNING_BLOCK: + snprintf(env_name, sizeof(env_name), + "emmc%d_hs200_data_in_tap_debug", + slot->bus_id); + env_set(env_name, how); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs200_data_in_tap_val", slot->bus_id); + env_set_ulong(env_name, tap); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs200_data_in_tap_start", + slot->bus_id); + env_set_ulong(env_name, best_start); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs200_data_in_tap_end", + slot->bus_id); + env_set_ulong(env_name, best_start + best_run); + break; + case MMC_CMD_SEND_STATUS: + snprintf(env_name, sizeof(env_name), + "emmc%d_hs200_cmd_in_tap_debug", + slot->bus_id); + env_set(env_name, how); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs200_cmd_in_tap_val", slot->bus_id); + env_set_ulong(env_name, tap); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs200_cmd_in_tap_start", + slot->bus_id); + env_set_ulong(env_name, best_start); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs200_cmd_in_tap_end", + slot->bus_id); + env_set_ulong(env_name, best_start + best_run); + break; + default: + snprintf(env_name, sizeof(env_name), + "emmc%d_hs200_data_out_tap", slot->bus_id); + env_set_ulong(env_name, slot->data_out_hs200_delay); + snprintf(env_name, sizeof(env_name), + "emmc%d_hs200_cmd_out_tap", slot->bus_id); + env_set_ulong(env_name, slot->cmd_out_hs200_delay); + break; + } + } + + return 0; +} + +static int octeontx_mmc_execute_tuning(struct udevice *dev, u32 opcode) +{ + struct mmc *mmc = dev_to_mmc(dev); + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + union mio_emm_timing emm_timing; + int err; + struct adj *a; + bool is_hs200; + char env_name[64]; + + pr_info("%s re-tuning, opcode 0x%x\n", dev->name, opcode); + + if (slot->is_asim || slot->is_emul) + return 0; + + is_hs200 = (mmc->selected_mode == MMC_HS_200); + if (is_hs200) { + slot->hs200_tuned = false; + slot->hs400_tuned = false; + } else { + slot->tuned = false; + } + octeontx_mmc_set_output_bus_timing(mmc); + octeontx_mmc_set_input_bus_timing(mmc); + emm_timing.u = read_csr(mmc, MIO_EMM_TIMING()); + if (mmc->selected_mode == MMC_HS_200) { + slot->hs200_taps.s.cmd_out_tap = emm_timing.s.cmd_out_tap; + slot->hs200_taps.s.data_out_tap = emm_timing.s.data_out_tap; + } else { + slot->taps.s.cmd_out_tap = emm_timing.s.cmd_out_tap; + slot->taps.s.data_out_tap = emm_timing.s.data_out_tap; + } + octeontx_mmc_set_input_bus_timing(mmc); + octeontx_mmc_set_output_bus_timing(mmc); + + for (a = adj; a->name; a++) { + ulong in_tap; + + if (!strcmp(a->name, "CMD_IN")) { + snprintf(env_name, sizeof(env_name), + "emmc%d_cmd_in_tap", slot->bus_id); + in_tap = env_get_ulong(env_name, 10, (ulong)-1); + if (in_tap != (ulong)-1) { + if (mmc->selected_mode == MMC_HS_200 || + a->hs200_only) { + slot->hs200_taps.s.cmd_in_tap = in_tap; + slot->hs400_taps.s.cmd_in_tap = in_tap; + } else { + slot->taps.s.cmd_in_tap = in_tap; + } + continue; + } + } else if (a->hs200_only && + !strcmp(a->name, "DATA_IN(HS200)")) { + snprintf(env_name, sizeof(env_name), + "emmc%d_data_in_tap_hs200", slot->bus_id); + in_tap = env_get_ulong(env_name, 10, (ulong)-1); + if (in_tap != (ulong)-1) { + debug("%s(%s): Overriding HS200 data in tap to %d\n", + __func__, dev->name, (int)in_tap); + slot->hs200_taps.s.data_in_tap = in_tap; + continue; + } + } else if (!a->hs200_only && !strcmp(a->name, "DATA_IN")) { + snprintf(env_name, sizeof(env_name), + "emmc%d_data_in_tap", slot->bus_id); + in_tap = env_get_ulong(env_name, 10, (ulong)-1); + if (in_tap != (ulong)-1) { + debug("%s(%s): Overriding non-HS200 data in tap to %d\n", + __func__, dev->name, (int)in_tap); + slot->taps.s.data_in_tap = in_tap; + continue; + } + } + + debug("%s(%s): Testing: %s, mode: %s, opcode: %u\n", __func__, + dev->name, a->name, mmc_mode_name(mmc->selected_mode), + opcode); + + /* Skip DDR only test when not in DDR mode */ + if (a->ddr_only && !mmc->ddr_mode) { + debug("%s(%s): Skipping %s due to non-DDR mode\n", + __func__, dev->name, a->name); + continue; + } + /* Skip hs200 tests in non-hs200 mode and + * non-hs200 tests in hs200 mode + */ + if (is_hs200) { + if (a->not_hs200_only) { + debug("%s(%s): Skipping %s\n", __func__, + dev->name, a->name); + continue; + } + } else { + if (a->hs200_only) { + debug("%s(%s): Skipping %s\n", __func__, + dev->name, a->name); + continue; + } + } + + err = octeontx_mmc_adjust_tuning(mmc, a, a->opcode ? + a->opcode : opcode); + if (err) { + pr_err("%s(%s, %u): tuning %s failed\n", __func__, + dev->name, opcode, a->name); + return err; + } + } + + octeontx_mmc_set_timing(mmc); + if (is_hs200) + slot->hs200_tuned = true; + else + slot->tuned = true; + + if (slot->hs400_tuning_block != -1) { + struct mmc_cmd cmd; + struct mmc_data data; + u8 buffer[mmc->read_bl_len]; + + cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK; + cmd.cmdarg = slot->hs400_tuning_block; + cmd.resp_type = MMC_RSP_R1; + data.dest = (void *)buffer; + data.blocks = 1; + data.blocksize = mmc->read_bl_len; + data.flags = MMC_DATA_READ; + err = octeontx_mmc_read_blocks(mmc, &cmd, &data, true) != 1; + + if (err) { + printf("%s: Cannot read HS400 tuning block %u\n", + dev->name, slot->hs400_tuning_block); + return err; + } + if (memcmp(buffer, octeontx_hs400_tuning_block, + sizeof(buffer))) { + debug("%s(%s): Writing new HS400 tuning block to block %d\n", + __func__, dev->name, slot->hs400_tuning_block); + cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK; + data.src = (void *)octeontx_hs400_tuning_block; + data.flags = MMC_DATA_WRITE; + err = !octeontx_mmc_write_blocks(mmc, &cmd, &data); + if (err) { + printf("%s: Cannot write HS400 tuning block %u\n", + dev->name, slot->hs400_tuning_block); + return -EINVAL; + } + } + } + + return 0; +} +#else /* MMC_SUPPORTS_TUNING */ +static void octeontx_mmc_set_emm_timing(struct mmc *mmc, + union mio_emm_timing emm_timing) +{ +} +#endif /* MMC_SUPPORTS_TUNING */ + +/** + * Calculate the clock period with rounding up + * + * @param mmc mmc device + * @return clock period in system clocks for clk_lo + clk_hi + */ +static u32 octeontx_mmc_calc_clk_period(struct mmc *mmc) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + struct octeontx_mmc_host *host = slot->host; + + return DIV_ROUND_UP(host->sys_freq, mmc->clock); +} + +static int octeontx_mmc_set_ios(struct udevice *dev) +{ + struct octeontx_mmc_slot *slot = dev_to_mmc_slot(dev); + struct mmc *mmc = &slot->mmc; + struct octeontx_mmc_host *host = slot->host; + union mio_emm_switch emm_switch; + union mio_emm_modex mode; + uint clock; + int bus_width = 0; + int clk_period = 0; + int power_class = 10; + int err = 0; + bool is_hs200 = false; + bool is_hs400 = false; + + debug("%s(%s): Entry\n", __func__, dev->name); + debug(" clock: %u, bus width: %u, mode: %u\n", mmc->clock, + mmc->bus_width, mmc->selected_mode); + debug(" host caps: 0x%x, card caps: 0x%x\n", mmc->host_caps, + mmc->card_caps); + octeontx_mmc_switch_to(mmc); + + clock = mmc->clock; + if (!clock) + clock = mmc->cfg->f_min; + + switch (mmc->bus_width) { + case 8: + bus_width = 2; + break; + case 4: + bus_width = 1; + break; + case 1: + bus_width = 0; + break; + default: + pr_warn("%s(%s): Invalid bus width %d, defaulting to 1\n", + __func__, dev->name, mmc->bus_width); + bus_width = 0; + } + + /* DDR is available for 4/8 bit bus width */ + if (mmc->ddr_mode && bus_width) + bus_width |= 4; + + debug("%s: sys_freq: %llu\n", __func__, host->sys_freq); + clk_period = octeontx_mmc_calc_clk_period(mmc); + + emm_switch.u = 0; + emm_switch.s.bus_width = bus_width; + emm_switch.s.power_class = power_class; + emm_switch.s.clk_hi = clk_period / 2; + emm_switch.s.clk_lo = clk_period / 2; + + debug("%s: last mode: %d, mode: %d, last clock: %u, clock: %u, ddr: %d\n", + __func__, slot->last_mode, mmc->selected_mode, + slot->last_clock, mmc->clock, mmc->ddr_mode); + switch (mmc->selected_mode) { + case MMC_LEGACY: + break; + case MMC_HS: + case SD_HS: + case MMC_HS_52: + emm_switch.s.hs_timing = 1; + break; + case MMC_HS_200: + is_hs200 = true; + fallthrough; + case UHS_SDR12: + case UHS_SDR25: + case UHS_SDR50: + case UHS_SDR104: + emm_switch.s.hs200_timing = 1; + break; + case MMC_HS_400: + is_hs400 = true; + fallthrough; + case UHS_DDR50: + case MMC_DDR_52: + emm_switch.s.hs400_timing = 1; + break; + default: + pr_err("%s(%s): Unsupported mode 0x%x\n", __func__, dev->name, + mmc->selected_mode); + return -1; + } + emm_switch.s.bus_id = slot->bus_id; + + if (!is_hs200 && !is_hs400 && + (mmc->selected_mode != slot->last_mode || + mmc->clock != slot->last_clock) && + !mmc->ddr_mode) { + slot->tuned = false; + slot->last_mode = mmc->selected_mode; + slot->last_clock = mmc->clock; + } + + if (CONFIG_IS_ENABLED(MMC_VERBOSE)) { + debug("%s(%s): Setting bus mode to %s\n", __func__, dev->name, + mmc_mode_name(mmc->selected_mode)); + } else { + debug("%s(%s): Setting bus mode to 0x%x\n", __func__, dev->name, + mmc->selected_mode); + } + + debug(" Trying switch 0x%llx w%d hs:%d hs200:%d hs400:%d\n", + emm_switch.u, emm_switch.s.bus_width, emm_switch.s.hs_timing, + emm_switch.s.hs200_timing, emm_switch.s.hs400_timing); + + set_wdog(mmc, 1000); + do_switch(mmc, emm_switch); + mdelay(100); + mode.u = read_csr(mmc, MIO_EMM_MODEX(slot->bus_id)); + debug("%s(%s): mode: 0x%llx w:%d, hs:%d, hs200:%d, hs400:%d\n", + __func__, dev->name, mode.u, mode.s.bus_width, + mode.s.hs_timing, mode.s.hs200_timing, mode.s.hs400_timing); + + err = octeontx_mmc_configure_delay(mmc); + +#ifdef MMC_SUPPORTS_TUNING + if (!err && mmc->selected_mode == MMC_HS_400 && !slot->hs400_tuned) { + debug("%s: Tuning HS400 mode\n", __func__); + err = octeontx_tune_hs400(mmc); + } +#endif + + return err; +} + +/** + * Gets the status of the card detect pin + */ +static int octeontx_mmc_get_cd(struct udevice *dev) +{ + struct octeontx_mmc_slot *slot = dev_to_mmc_slot(dev); + int val = 1; + + if (dm_gpio_is_valid(&slot->cd_gpio)) { + val = dm_gpio_get_value(&slot->cd_gpio); + val ^= slot->cd_inverted; + } + debug("%s(%s): cd: %d\n", __func__, dev->name, val); + return val; +} + +/** + * Gets the status of the write protect pin + */ +static int octeontx_mmc_get_wp(struct udevice *dev) +{ + struct octeontx_mmc_slot *slot = dev_to_mmc_slot(dev); + int val = 0; + + if (dm_gpio_is_valid(&slot->wp_gpio)) { + val = dm_gpio_get_value(&slot->wp_gpio); + val ^= slot->wp_inverted; + } + debug("%s(%s): wp: %d\n", __func__, dev->name, val); + return val; +} + +static void octeontx_mmc_set_timing(struct mmc *mmc) +{ + union mio_emm_timing timing; + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + + switch (mmc->selected_mode) { + case MMC_HS_200: + timing = slot->hs200_taps; + break; + case MMC_HS_400: + timing = slot->hs400_tuned ? + slot->hs400_taps : slot->hs200_taps; + break; + default: + timing = slot->taps; + break; + } + + debug("%s(%s):\n cmd_in_tap: %u\n cmd_out_tap: %u\n data_in_tap: %u\n data_out_tap: %u\n", + __func__, mmc->dev->name, timing.s.cmd_in_tap, + timing.s.cmd_out_tap, timing.s.data_in_tap, + timing.s.data_out_tap); + + octeontx_mmc_set_emm_timing(mmc, timing); +} + +static int octeontx_mmc_configure_delay(struct mmc *mmc) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + struct octeontx_mmc_host *host __maybe_unused = slot->host; + bool __maybe_unused is_hs200; + bool __maybe_unused is_hs400; + + debug("%s(%s)\n", __func__, mmc->dev->name); + + if (IS_ENABLED(CONFIG_ARCH_OCTEONTX)) { + union mio_emm_sample emm_sample; + + emm_sample.u = 0; + emm_sample.s.cmd_cnt = slot->cmd_cnt; + emm_sample.s.dat_cnt = slot->dat_cnt; + write_csr(mmc, MIO_EMM_SAMPLE(), emm_sample.u); + } else { + is_hs200 = (mmc->selected_mode == MMC_HS_200); + is_hs400 = (mmc->selected_mode == MMC_HS_400); + + if ((is_hs200 && slot->hs200_tuned) || + (is_hs400 && slot->hs400_tuned) || + (!is_hs200 && !is_hs400 && slot->tuned)) { + octeontx_mmc_set_output_bus_timing(mmc); + } else { + int half = MAX_NO_OF_TAPS / 2; + int dout, cout; + + switch (mmc->selected_mode) { + case MMC_LEGACY: + if (IS_SD(mmc)) { + cout = MMC_SD_LEGACY_DEFAULT_CMD_OUT_TAP; + dout = MMC_SD_LEGACY_DEFAULT_DATA_OUT_TAP; + } else { + cout = MMC_LEGACY_DEFAULT_CMD_OUT_TAP; + dout = MMC_LEGACY_DEFAULT_DATA_OUT_TAP; + } + break; + case MMC_HS: + cout = MMC_HS_CMD_OUT_TAP; + dout = MMC_HS_DATA_OUT_TAP; + break; + case SD_HS: + case UHS_SDR12: + case UHS_SDR25: + case UHS_SDR50: + cout = MMC_SD_HS_CMD_OUT_TAP; + dout = MMC_SD_HS_DATA_OUT_TAP; + break; + case UHS_SDR104: + case UHS_DDR50: + case MMC_HS_52: + case MMC_DDR_52: + cout = MMC_DEFAULT_CMD_OUT_TAP; + dout = MMC_DEFAULT_DATA_OUT_TAP; + break; + case MMC_HS_200: + cout = -1; + dout = -1; + if (host->timing_calibrated) { + cout = octeontx2_mmc_calc_delay( + mmc, slot->cmd_out_hs200_delay); + dout = octeontx2_mmc_calc_delay( + mmc, + slot->data_out_hs200_delay); + debug("%s(%s): Calibrated HS200/HS400 cmd out delay: %dps tap: %d, data out delay: %d, tap: %d\n", + __func__, mmc->dev->name, + slot->cmd_out_hs200_delay, cout, + slot->data_out_hs200_delay, dout); + } else { + cout = MMC_DEFAULT_HS200_CMD_OUT_TAP; + dout = MMC_DEFAULT_HS200_DATA_OUT_TAP; + } + is_hs200 = true; + break; + case MMC_HS_400: + cout = -1; + dout = -1; + if (host->timing_calibrated) { + if (slot->cmd_out_hs400_delay) + cout = octeontx2_mmc_calc_delay( + mmc, + slot->cmd_out_hs400_delay); + if (slot->data_out_hs400_delay) + dout = octeontx2_mmc_calc_delay( + mmc, + slot->data_out_hs400_delay); + debug("%s(%s): Calibrated HS200/HS400 cmd out delay: %dps tap: %d, data out delay: %d, tap: %d\n", + __func__, mmc->dev->name, + slot->cmd_out_hs400_delay, cout, + slot->data_out_hs400_delay, dout); + } else { + cout = MMC_DEFAULT_HS400_CMD_OUT_TAP; + dout = MMC_DEFAULT_HS400_DATA_OUT_TAP; + } + is_hs400 = true; + break; + default: + pr_err("%s(%s): Invalid mode %d\n", __func__, + mmc->dev->name, mmc->selected_mode); + return -1; + } + debug("%s(%s): Not tuned, hs200: %d, hs200 tuned: %d, hs400: %d, hs400 tuned: %d, tuned: %d\n", + __func__, mmc->dev->name, is_hs200, + slot->hs200_tuned, + is_hs400, slot->hs400_tuned, slot->tuned); + /* Set some defaults */ + if (is_hs200) { + slot->hs200_taps.u = 0; + slot->hs200_taps.s.cmd_out_tap = cout; + slot->hs200_taps.s.data_out_tap = dout; + slot->hs200_taps.s.cmd_in_tap = half; + slot->hs200_taps.s.data_in_tap = half; + } else if (is_hs400) { + slot->hs400_taps.u = 0; + slot->hs400_taps.s.cmd_out_tap = cout; + slot->hs400_taps.s.data_out_tap = dout; + slot->hs400_taps.s.cmd_in_tap = half; + slot->hs400_taps.s.data_in_tap = half; + } else { + slot->taps.u = 0; + slot->taps.s.cmd_out_tap = cout; + slot->taps.s.data_out_tap = dout; + slot->taps.s.cmd_in_tap = half; + slot->taps.s.data_in_tap = half; + } + } + + if (is_hs200) + debug("%s(%s): hs200 taps: ci: %u, co: %u, di: %u, do: %u\n", + __func__, mmc->dev->name, + slot->hs200_taps.s.cmd_in_tap, + slot->hs200_taps.s.cmd_out_tap, + slot->hs200_taps.s.data_in_tap, + slot->hs200_taps.s.data_out_tap); + else if (is_hs400) + debug("%s(%s): hs400 taps: ci: %u, co: %u, di: %u, do: %u\n", + __func__, mmc->dev->name, + slot->hs400_taps.s.cmd_in_tap, + slot->hs400_taps.s.cmd_out_tap, + slot->hs400_taps.s.data_in_tap, + slot->hs400_taps.s.data_out_tap); + else + debug("%s(%s): taps: ci: %u, co: %u, di: %u, do: %u\n", + __func__, mmc->dev->name, slot->taps.s.cmd_in_tap, + slot->taps.s.cmd_out_tap, + slot->taps.s.data_in_tap, + slot->taps.s.data_out_tap); + octeontx_mmc_set_timing(mmc); + debug("%s: Done\n", __func__); + } + + return 0; +} + +/** + * Sets the MMC watchdog timer in microseconds + * + * @param mmc mmc device + * @param us timeout in microseconds, 0 for maximum timeout + */ +static void set_wdog(struct mmc *mmc, u64 us) +{ + union mio_emm_wdog wdog; + u64 val; + + val = (us * mmc->clock) / 1000000; + if (val >= (1 << 26) || !us) { + if (us) + pr_debug("%s: warning: timeout %llu exceeds max value %llu, truncating\n", + __func__, us, + (u64)(((1ULL << 26) - 1) * 1000000ULL) / + mmc->clock); + val = (1 << 26) - 1; + } + wdog.u = 0; + wdog.s.clk_cnt = val; + write_csr(mmc, MIO_EMM_WDOG(), wdog.u); +} + +/** + * Set the IO drive strength and slew + * + * @param mmc mmc device + */ +static void octeontx_mmc_io_drive_setup(struct mmc *mmc) +{ + if (!IS_ENABLED(CONFIG_ARCH_OCTEONTX)) { + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + union mio_emm_io_ctl io_ctl; + + if (slot->drive < 0 || slot->slew < 0) + return; + + io_ctl.u = 0; + io_ctl.s.drive = slot->drive; + io_ctl.s.slew = slot->slew; + write_csr(mmc, MIO_EMM_IO_CTL(), io_ctl.u); + } +} + +/** + * Print switch errors + * + * @param mmc mmc device + */ +static void check_switch_errors(struct mmc *mmc) +{ + union mio_emm_switch emm_switch; + + emm_switch.u = read_csr(mmc, MIO_EMM_SWITCH()); + if (emm_switch.s.switch_err0) + pr_err("%s: Switch power class error\n", mmc->cfg->name); + if (emm_switch.s.switch_err1) + pr_err("%s: Switch HS timing error\n", mmc->cfg->name); + if (emm_switch.s.switch_err2) + pr_err("%s: Switch bus width error\n", mmc->cfg->name); +} + +static void do_switch(struct mmc *mmc, union mio_emm_switch emm_switch) +{ + union mio_emm_rsp_sts rsp_sts; + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + int bus_id = emm_switch.s.bus_id; + ulong start; + + if (emm_switch.s.bus_id != 0) { + emm_switch.s.bus_id = 0; + write_csr(mmc, MIO_EMM_SWITCH(), emm_switch.u); + udelay(100); + emm_switch.s.bus_id = bus_id; + } + debug("%s(%s, 0x%llx)\n", __func__, mmc->dev->name, emm_switch.u); + write_csr(mmc, MIO_EMM_SWITCH(), emm_switch.u); + + start = get_timer(0); + do { + rsp_sts.u = read_csr(mmc, MIO_EMM_RSP_STS()); + if (!rsp_sts.s.switch_val) + break; + udelay(100); + } while (get_timer(start) < 10); + if (rsp_sts.s.switch_val) { + pr_warn("%s(%s): Warning: writing 0x%llx to emm_switch timed out, status: 0x%llx\n", + __func__, mmc->dev->name, emm_switch.u, rsp_sts.u); + } + slot->cached_switch = emm_switch; + check_switch_errors(mmc); + slot->cached_switch.u = emm_switch.u; + debug("%s: emm_switch: 0x%llx, rsp_lo: 0x%llx\n", + __func__, read_csr(mmc, MIO_EMM_SWITCH()), + read_csr(mmc, MIO_EMM_RSP_LO())); +} + +/** + * Given a delay in ps, return the tap delay count + * + * @param mmc mmc data structure + * @param delay delay in picoseconds + * + * @return Number of tap cycles or error if -1 + */ +static int octeontx2_mmc_calc_delay(struct mmc *mmc, int delay) +{ + struct octeontx_mmc_host *host = mmc_to_host(mmc); + + if (host->is_asim || host->is_emul) + return 63; + + if (!host->timing_taps) { + pr_err("%s(%s): Error: host timing not calibrated\n", + __func__, mmc->dev->name); + return -1; + } + debug("%s(%s, %d) timing taps: %llu\n", __func__, mmc->dev->name, + delay, host->timing_taps); + return min_t(int, DIV_ROUND_UP(delay, host->timing_taps), 63); +} + +/** + * Calibrates the delay based on the internal clock + * + * @param mmc Pointer to mmc data structure + * + * @return 0 for success or -ETIMEDOUT on error + * + * NOTE: On error a default value will be calculated. + */ +static int octeontx_mmc_calibrate_delay(struct mmc *mmc) +{ + union mio_emm_calb emm_calb; + union mio_emm_tap emm_tap; + union mio_emm_cfg emm_cfg; + union mio_emm_io_ctl emm_io_ctl; + union mio_emm_switch emm_switch; + union mio_emm_wdog emm_wdog; + union mio_emm_sts_mask emm_sts_mask; + union mio_emm_debug emm_debug; + union mio_emm_timing emm_timing; + struct octeontx_mmc_host *host = mmc_to_host(mmc); + ulong start; + u8 bus_id, bus_ena; + + debug("%s: Calibrating delay\n", __func__); + if (host->is_asim || host->is_emul) { + debug(" No calibration for ASIM\n"); + return 0; + } + emm_tap.u = 0; + if (host->calibrate_glitch) { + emm_tap.s.delay = MMC_DEFAULT_TAP_DELAY; + } else { + /* Save registers */ + emm_cfg.u = read_csr(mmc, MIO_EMM_CFG()); + emm_io_ctl.u = read_csr(mmc, MIO_EMM_IO_CTL()); + emm_switch.u = read_csr(mmc, MIO_EMM_SWITCH()); + emm_wdog.u = read_csr(mmc, MIO_EMM_WDOG()); + emm_sts_mask.u = read_csr(mmc, MIO_EMM_STS_MASK()); + emm_debug.u = read_csr(mmc, MIO_EMM_DEBUG()); + emm_timing.u = read_csr(mmc, MIO_EMM_TIMING()); + bus_ena = emm_cfg.s.bus_ena; + bus_id = emm_switch.s.bus_id; + emm_cfg.s.bus_ena = 0; + write_csr(mmc, MIO_EMM_CFG(), emm_cfg.u); + udelay(1); + emm_cfg.s.bus_ena = 1ULL << 3; + write_csr(mmc, MIO_EMM_CFG(), emm_cfg.u); + mdelay(1); + emm_calb.u = 0; + write_csr(mmc, MIO_EMM_CALB(), emm_calb.u); + emm_calb.s.start = 1; + write_csr(mmc, MIO_EMM_CALB(), emm_calb.u); + start = get_timer(0); + /* This should only take 3 microseconds */ + do { + udelay(5); + emm_tap.u = read_csr(mmc, MIO_EMM_TAP()); + } while (!emm_tap.s.delay && get_timer(start) < 10); + + emm_calb.s.start = 0; + write_csr(mmc, MIO_EMM_CALB(), emm_calb.u); + + emm_cfg.s.bus_ena = 0; + write_csr(mmc, MIO_EMM_CFG(), emm_cfg.u); + udelay(1); + /* Restore registers */ + emm_cfg.s.bus_ena = bus_ena; + write_csr(mmc, MIO_EMM_CFG(), emm_cfg.u); + if (host->tap_requires_noclk) { + /* Turn off the clock */ + emm_debug.u = read_csr(mmc, MIO_EMM_DEBUG()); + emm_debug.s.emmc_clk_disable = 1; + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + udelay(1); + emm_debug.s.rdsync_rst = 1; + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + udelay(1); + } + + write_csr(mmc, MIO_EMM_TIMING(), emm_timing.u); + if (host->tap_requires_noclk) { + /* Turn the clock back on */ + udelay(1); + emm_debug.s.rdsync_rst = 0; + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + udelay(1); + emm_debug.s.emmc_clk_disable = 0; + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + } + udelay(1); + write_csr(mmc, MIO_EMM_IO_CTL(), emm_io_ctl.u); + bus_id = emm_switch.s.bus_id; + emm_switch.s.bus_id = 0; + write_csr(mmc, MIO_EMM_SWITCH(), emm_switch.u); + emm_switch.s.bus_id = bus_id; + write_csr(mmc, MIO_EMM_SWITCH(), emm_switch.u); + write_csr(mmc, MIO_EMM_WDOG(), emm_wdog.u); + write_csr(mmc, MIO_EMM_STS_MASK(), emm_sts_mask.u); + write_csr(mmc, MIO_EMM_RCA(), mmc->rca); + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + + if (!emm_tap.s.delay) { + pr_err("%s: Error: delay calibration failed, timed out.\n", + __func__); + /* Set to default value if timed out */ + emm_tap.s.delay = MMC_DEFAULT_TAP_DELAY; + return -ETIMEDOUT; + } + } + /* Round up */ + host->timing_taps = (10 * 1000 * emm_tap.s.delay) / TOTAL_NO_OF_TAPS; + debug("%s(%s): timing taps: %llu, delay: %u\n", + __func__, mmc->dev->name, host->timing_taps, emm_tap.s.delay); + host->timing_calibrated = true; + return 0; +} + +static int octeontx_mmc_set_input_bus_timing(struct mmc *mmc) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + + if (IS_ENABLED(CONFIG_ARCH_OCTEONTX)) { + union mio_emm_sample sample; + + sample.u = 0; + sample.s.cmd_cnt = slot->cmd_clk_skew; + sample.s.dat_cnt = slot->dat_clk_skew; + write_csr(mmc, MIO_EMM_SAMPLE(), sample.u); + } else { + union mio_emm_timing timing; + + timing.u = read_csr(mmc, MIO_EMM_TIMING()); + if (mmc->selected_mode == MMC_HS_200) { + if (slot->hs200_tuned) { + timing.s.cmd_in_tap = + slot->hs200_taps.s.cmd_in_tap; + timing.s.data_in_tap = + slot->hs200_taps.s.data_in_tap; + } else { + pr_warn("%s(%s): Warning: hs200 timing not tuned\n", + __func__, mmc->dev->name); + timing.s.cmd_in_tap = + MMC_DEFAULT_HS200_CMD_IN_TAP; + timing.s.data_in_tap = + MMC_DEFAULT_HS200_DATA_IN_TAP; + } + } else if (mmc->selected_mode == MMC_HS_400) { + if (slot->hs400_tuned) { + timing.s.cmd_in_tap = + slot->hs400_taps.s.cmd_in_tap; + timing.s.data_in_tap = + slot->hs400_taps.s.data_in_tap; + } else if (slot->hs200_tuned) { + timing.s.cmd_in_tap = + slot->hs200_taps.s.cmd_in_tap; + timing.s.data_in_tap = + slot->hs200_taps.s.data_in_tap; + } else { + pr_warn("%s(%s): Warning: hs400 timing not tuned\n", + __func__, mmc->dev->name); + timing.s.cmd_in_tap = + MMC_DEFAULT_HS200_CMD_IN_TAP; + timing.s.data_in_tap = + MMC_DEFAULT_HS200_DATA_IN_TAP; + } + } else if (slot->tuned) { + timing.s.cmd_in_tap = slot->taps.s.cmd_in_tap; + timing.s.data_in_tap = slot->taps.s.data_in_tap; + } else { + timing.s.cmd_in_tap = MMC_DEFAULT_CMD_IN_TAP; + timing.s.data_in_tap = MMC_DEFAULT_DATA_IN_TAP; + } + octeontx_mmc_set_emm_timing(mmc, timing); + } + + return 0; +} + +/** + * Sets the default bus timing for the current mode. + * + * @param mmc mmc data structure + * + * @return 0 for success, error otherwise + */ +static int octeontx_mmc_set_output_bus_timing(struct mmc *mmc) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + union mio_emm_timing timing; + int cout_bdelay, dout_bdelay; + unsigned int cout_delay, dout_delay; + char env_name[32]; + + if (IS_ENABLED(CONFIG_ARCH_OCTEONTX)) + return 0; + + debug("%s(%s)\n", __func__, mmc->dev->name); + if (slot->is_asim || slot->is_emul) + return 0; + + octeontx_mmc_calibrate_delay(mmc); + + if (mmc->clock < 26000000) { + cout_delay = 5000; + dout_delay = 5000; + } else if (mmc->clock <= 52000000) { + cout_delay = 2500; + dout_delay = 2500; + } else if (!mmc_is_mode_ddr(mmc->selected_mode)) { + cout_delay = slot->cmd_out_hs200_delay; + dout_delay = slot->data_out_hs200_delay; + } else { + cout_delay = slot->cmd_out_hs400_delay; + dout_delay = slot->data_out_hs400_delay; + } + + snprintf(env_name, sizeof(env_name), "mmc%d_hs200_dout_delay_ps", + slot->bus_id); + dout_delay = env_get_ulong(env_name, 10, dout_delay); + debug("%s: dout_delay: %u\n", __func__, dout_delay); + + cout_bdelay = octeontx2_mmc_calc_delay(mmc, cout_delay); + dout_bdelay = octeontx2_mmc_calc_delay(mmc, dout_delay); + + debug("%s: cmd output delay: %u, data output delay: %u, cmd bdelay: %d, data bdelay: %d, clock: %d\n", + __func__, cout_delay, dout_delay, cout_bdelay, dout_bdelay, + mmc->clock); + if (cout_bdelay < 0 || dout_bdelay < 0) { + pr_err("%s: Error: could not calculate command and/or data clock skew\n", + __func__); + return -1; + } + timing.u = read_csr(mmc, MIO_EMM_TIMING()); + timing.s.cmd_out_tap = cout_bdelay; + timing.s.data_out_tap = dout_bdelay; + if (mmc->selected_mode == MMC_HS_200) { + slot->hs200_taps.s.cmd_out_tap = cout_bdelay; + slot->hs200_taps.s.data_out_tap = dout_bdelay; + } else if (mmc->selected_mode == MMC_HS_400) { + slot->hs400_taps.s.cmd_out_tap = cout_bdelay; + slot->hs400_taps.s.data_out_tap = dout_bdelay; + } else { + slot->taps.s.cmd_out_tap = cout_bdelay; + slot->taps.s.data_out_tap = dout_bdelay; + } + octeontx_mmc_set_emm_timing(mmc, timing); + debug("%s(%s): bdelay: %d/%d, clock: %d, ddr: %s, timing taps: %llu, do: %d, di: %d, co: %d, ci: %d\n", + __func__, mmc->dev->name, cout_bdelay, dout_bdelay, mmc->clock, + mmc->ddr_mode ? "yes" : "no", + mmc_to_host(mmc)->timing_taps, + timing.s.data_out_tap, + timing.s.data_in_tap, + timing.s.cmd_out_tap, + timing.s.cmd_in_tap); + + return 0; +} + +static void octeontx_mmc_set_clock(struct mmc *mmc) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + uint clock; + + clock = min(mmc->cfg->f_max, (uint)slot->clock); + clock = max(mmc->cfg->f_min, clock); + debug("%s(%s): f_min: %u, f_max: %u, clock: %u\n", __func__, + mmc->dev->name, mmc->cfg->f_min, mmc->cfg->f_max, clock); + slot->clock = clock; + mmc->clock = clock; +} + +/** + * This switches I/O power as needed when switching between slots. + * + * @param mmc mmc data structure + */ +static void octeontx_mmc_switch_io(struct mmc *mmc) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + struct octeontx_mmc_host *host = slot->host; + struct mmc *last_mmc = host->last_mmc; + static struct udevice *last_reg; + union mio_emm_cfg emm_cfg; + int bus; + static bool initialized; + + /* First time? */ + if (!initialized || mmc != host->last_mmc) { + struct mmc *ommc; + + /* Switch to bus 3 which is unused */ + emm_cfg.u = read_csr(mmc, MIO_EMM_CFG()); + emm_cfg.s.bus_ena = 1 << 3; + write_csr(mmc, MIO_EMM_CFG(), emm_cfg.u); + + /* Turn off all other I/O interfaces with first initialization + * if at least one supply was found. + */ + for (bus = 0; bus <= OCTEONTX_MAX_MMC_SLOT; bus++) { + ommc = &host->slots[bus].mmc; + + /* Handle self case later */ + if (ommc == mmc || !ommc->vqmmc_supply) + continue; + + /* Skip if we're not switching regulators */ + if (last_reg == mmc->vqmmc_supply) + continue; + + /* Turn off other regulators */ + if (ommc->vqmmc_supply != mmc->vqmmc_supply) + regulator_set_enable(ommc->vqmmc_supply, false); + } + /* Turn ourself on */ + if (mmc->vqmmc_supply && last_reg != mmc->vqmmc_supply) + regulator_set_enable(mmc->vqmmc_supply, true); + mdelay(1); /* Settle time */ + /* Switch to new bus */ + emm_cfg.s.bus_ena = 1 << slot->bus_id; + write_csr(mmc, MIO_EMM_CFG(), emm_cfg.u); + last_reg = mmc->vqmmc_supply; + initialized = true; + return; + } + + /* No change in device */ + if (last_mmc == mmc) + return; + + if (!last_mmc) { + pr_warn("%s(%s): No previous slot detected in IO slot switch!\n", + __func__, mmc->dev->name); + return; + } + + debug("%s(%s): last: %s, supply: %p\n", __func__, mmc->dev->name, + last_mmc->dev->name, mmc->vqmmc_supply); + + /* The supply is the same so we do nothing */ + if (last_mmc->vqmmc_supply == mmc->vqmmc_supply) + return; + + /* Turn off the old slot I/O supply */ + if (last_mmc->vqmmc_supply) { + debug("%s(%s): Turning off IO to %s, supply: %s\n", + __func__, mmc->dev->name, last_mmc->dev->name, + last_mmc->vqmmc_supply->name); + regulator_set_enable(last_mmc->vqmmc_supply, false); + } + /* Turn on the new slot I/O supply */ + if (mmc->vqmmc_supply) { + debug("%s(%s): Turning on IO to slot %d, supply: %s\n", + __func__, mmc->dev->name, slot->bus_id, + mmc->vqmmc_supply->name); + regulator_set_enable(mmc->vqmmc_supply, true); + } + /* Allow power to settle */ + mdelay(1); +} + +/** + * Called to switch between mmc devices + * + * @param mmc new mmc device + */ +static void octeontx_mmc_switch_to(struct mmc *mmc) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + struct octeontx_mmc_slot *old_slot; + struct octeontx_mmc_host *host = slot->host; + union mio_emm_switch emm_switch; + union mio_emm_sts_mask emm_sts_mask; + union mio_emm_rca emm_rca; + + if (slot->bus_id == host->last_slotid) + return; + + debug("%s(%s) switching from slot %d to slot %d\n", __func__, + mmc->dev->name, host->last_slotid, slot->bus_id); + octeontx_mmc_switch_io(mmc); + + if (host->last_slotid >= 0 && slot->valid) { + old_slot = &host->slots[host->last_slotid]; + old_slot->cached_switch.u = read_csr(mmc, MIO_EMM_SWITCH()); + old_slot->cached_rca.u = read_csr(mmc, MIO_EMM_RCA()); + } + if (mmc->rca) + write_csr(mmc, MIO_EMM_RCA(), mmc->rca); + emm_switch = slot->cached_switch; + do_switch(mmc, emm_switch); + emm_rca.u = 0; + emm_rca.s.card_rca = mmc->rca; + write_csr(mmc, MIO_EMM_RCA(), emm_rca.u); + mdelay(100); + + set_wdog(mmc, 100000); + if (octeontx_mmc_set_output_bus_timing(mmc) || + octeontx_mmc_set_input_bus_timing(mmc)) + pr_err("%s(%s): Error setting bus timing\n", __func__, + mmc->dev->name); + octeontx_mmc_io_drive_setup(mmc); + + emm_sts_mask.u = 0; + emm_sts_mask.s.sts_msk = 1 << 7 | 1 << 22 | 1 << 23 | 1 << 19; + write_csr(mmc, MIO_EMM_STS_MASK(), emm_sts_mask.u); + host->last_slotid = slot->bus_id; + host->last_mmc = mmc; + mdelay(10); +} + +/** + * Perform initial timing configuration + * + * @param mmc mmc device + * + * @return 0 for success + * + * NOTE: This will need to be updated when new silicon comes out + */ +static int octeontx_mmc_init_timing(struct mmc *mmc) +{ + union mio_emm_timing timing; + + if (mmc_to_slot(mmc)->is_asim || mmc_to_slot(mmc)->is_emul) + return 0; + + debug("%s(%s)\n", __func__, mmc->dev->name); + timing.u = 0; + timing.s.cmd_out_tap = MMC_DEFAULT_CMD_OUT_TAP; + timing.s.data_out_tap = MMC_DEFAULT_DATA_OUT_TAP; + timing.s.cmd_in_tap = MMC_DEFAULT_CMD_IN_TAP; + timing.s.data_in_tap = MMC_DEFAULT_DATA_IN_TAP; + octeontx_mmc_set_emm_timing(mmc, timing); + return 0; +} + +/** + * Perform low-level initialization + * + * @param mmc mmc device + * + * @return 0 for success, error otherwise + */ +static int octeontx_mmc_init_lowlevel(struct mmc *mmc) +{ + struct octeontx_mmc_slot *slot = mmc_to_slot(mmc); + struct octeontx_mmc_host *host = slot->host; + union mio_emm_switch emm_switch; + u32 clk_period; + + debug("%s(%s): lowlevel init for slot %d\n", __func__, + mmc->dev->name, slot->bus_id); + host->emm_cfg.s.bus_ena &= ~(1 << slot->bus_id); + write_csr(mmc, MIO_EMM_CFG(), host->emm_cfg.u); + udelay(100); + host->emm_cfg.s.bus_ena |= 1 << slot->bus_id; + write_csr(mmc, MIO_EMM_CFG(), host->emm_cfg.u); + udelay(10); + slot->clock = mmc->cfg->f_min; + octeontx_mmc_set_clock(&slot->mmc); + + if (IS_ENABLED(CONFIG_ARCH_OCTEONTX2)) { + if (host->cond_clock_glitch) { + union mio_emm_debug emm_debug; + + emm_debug.u = read_csr(mmc, MIO_EMM_DEBUG()); + emm_debug.s.clk_on = 1; + write_csr(mmc, MIO_EMM_DEBUG(), emm_debug.u); + } + octeontx_mmc_calibrate_delay(&slot->mmc); + } + + clk_period = octeontx_mmc_calc_clk_period(mmc); + emm_switch.u = 0; + emm_switch.s.power_class = 10; + emm_switch.s.clk_lo = clk_period / 2; + emm_switch.s.clk_hi = clk_period / 2; + + emm_switch.s.bus_id = slot->bus_id; + debug("%s: Performing switch\n", __func__); + do_switch(mmc, emm_switch); + slot->cached_switch.u = emm_switch.u; + + if (!IS_ENABLED(CONFIG_ARCH_OCTEONTX)) + octeontx_mmc_init_timing(mmc); + + set_wdog(mmc, 1000000); /* Set to 1 second */ + write_csr(mmc, MIO_EMM_STS_MASK(), 0xe4390080ull); + write_csr(mmc, MIO_EMM_RCA(), 1); + mdelay(10); + debug("%s: done\n", __func__); + return 0; +} + +/** + * Translates a voltage number to bits in MMC register + * + * @param voltage voltage in microvolts + * + * @return MMC register value for voltage + */ +static u32 xlate_voltage(u32 voltage) +{ + u32 volt = 0; + + /* Convert to millivolts */ + voltage /= 1000; + if (voltage >= 1650 && voltage <= 1950) + volt |= MMC_VDD_165_195; + if (voltage >= 2000 && voltage <= 2100) + volt |= MMC_VDD_20_21; + if (voltage >= 2100 && voltage <= 2200) + volt |= MMC_VDD_21_22; + if (voltage >= 2200 && voltage <= 2300) + volt |= MMC_VDD_22_23; + if (voltage >= 2300 && voltage <= 2400) + volt |= MMC_VDD_23_24; + if (voltage >= 2400 && voltage <= 2500) + volt |= MMC_VDD_24_25; + if (voltage >= 2500 && voltage <= 2600) + volt |= MMC_VDD_25_26; + if (voltage >= 2600 && voltage <= 2700) + volt |= MMC_VDD_26_27; + if (voltage >= 2700 && voltage <= 2800) + volt |= MMC_VDD_27_28; + if (voltage >= 2800 && voltage <= 2900) + volt |= MMC_VDD_28_29; + if (voltage >= 2900 && voltage <= 3000) + volt |= MMC_VDD_29_30; + if (voltage >= 3000 && voltage <= 3100) + volt |= MMC_VDD_30_31; + if (voltage >= 3100 && voltage <= 3200) + volt |= MMC_VDD_31_32; + if (voltage >= 3200 && voltage <= 3300) + volt |= MMC_VDD_32_33; + if (voltage >= 3300 && voltage <= 3400) + volt |= MMC_VDD_33_34; + if (voltage >= 3400 && voltage <= 3500) + volt |= MMC_VDD_34_35; + if (voltage >= 3500 && voltage <= 3600) + volt |= MMC_VDD_35_36; + + return volt; +} + +/** + * Check if a slot is valid in the device tree + * + * @param dev slot device to check + * + * @return true if status reports "ok" or "okay" or if no status, + * false otherwise. + */ +static bool octeontx_mmc_get_valid(struct udevice *dev) +{ + const char *stat = ofnode_read_string(dev->node, "status"); + + if (!stat || !strncmp(stat, "ok", 2)) + return true; + else + return false; +} + +/** + * Reads slot configuration from the device tree + * + * @param dev slot device + * + * @return 0 on success, otherwise error + */ +static int octeontx_mmc_get_config(struct udevice *dev) +{ + struct octeontx_mmc_slot *slot = dev_to_mmc_slot(dev); + uint voltages[2]; + uint low, high; + char env_name[32]; + int err; + ofnode node = dev->node; + int bus_width = 1; + ulong new_max_freq; + + debug("%s(%s)", __func__, dev->name); + slot->cfg.name = dev->name; + + slot->cfg.f_max = ofnode_read_s32_default(dev->node, "max-frequency", + 26000000); + snprintf(env_name, sizeof(env_name), "mmc_max_frequency%d", + slot->bus_id); + + new_max_freq = env_get_ulong(env_name, 10, slot->cfg.f_max); + debug("Reading %s, got %lu\n", env_name, new_max_freq); + + if (new_max_freq != slot->cfg.f_max) { + printf("Overriding device tree MMC maximum frequency %u to %lu\n", + slot->cfg.f_max, new_max_freq); + slot->cfg.f_max = new_max_freq; + } + slot->cfg.f_min = 400000; + slot->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT; + + if (IS_ENABLED(CONFIG_ARCH_OCTEONTX2)) { + slot->hs400_tuning_block = + ofnode_read_s32_default(dev->node, + "marvell,hs400-tuning-block", + -1); + debug("%s(%s): mmc HS400 tuning block: %d\n", __func__, + dev->name, slot->hs400_tuning_block); + + slot->hs200_tap_adj = + ofnode_read_s32_default(dev->node, + "marvell,hs200-tap-adjust", 0); + debug("%s(%s): hs200-tap-adjust: %d\n", __func__, dev->name, + slot->hs200_tap_adj); + slot->hs400_tap_adj = + ofnode_read_s32_default(dev->node, + "marvell,hs400-tap-adjust", 0); + debug("%s(%s): hs400-tap-adjust: %d\n", __func__, dev->name, + slot->hs400_tap_adj); + } + + err = ofnode_read_u32_array(dev->node, "voltage-ranges", voltages, 2); + if (err) { + slot->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34; + } else { + low = xlate_voltage(voltages[0]); + high = xlate_voltage(voltages[1]); + debug(" low voltage: 0x%x (%u), high: 0x%x (%u)\n", + low, voltages[0], high, voltages[1]); + if (low > high || !low || !high) { + pr_err("Invalid MMC voltage range [%u-%u] specified for %s\n", + low, high, dev->name); + return -1; + } + slot->cfg.voltages = 0; + do { + slot->cfg.voltages |= low; + low <<= 1; + } while (low <= high); + } + debug("%s: config voltages: 0x%x\n", __func__, slot->cfg.voltages); + slot->slew = ofnode_read_s32_default(node, "cavium,clk-slew", -1); + slot->drive = ofnode_read_s32_default(node, "cavium,drv-strength", -1); + gpio_request_by_name(dev, "cd-gpios", 0, &slot->cd_gpio, GPIOD_IS_IN); + slot->cd_inverted = ofnode_read_bool(node, "cd-inverted"); + gpio_request_by_name(dev, "wp-gpios", 0, &slot->wp_gpio, GPIOD_IS_IN); + slot->wp_inverted = ofnode_read_bool(node, "wp-inverted"); + if (slot->cfg.voltages & MMC_VDD_165_195) { + slot->is_1_8v = true; + slot->is_3_3v = false; + } else if (slot->cfg.voltages & (MMC_VDD_30_31 | MMC_VDD_31_32 | + MMC_VDD_33_34 | MMC_VDD_34_35 | + MMC_VDD_35_36)) { + slot->is_1_8v = false; + slot->is_3_3v = true; + } + + bus_width = ofnode_read_u32_default(node, "bus-width", 1); + /* Note fall-through */ + switch (bus_width) { + case 8: + slot->cfg.host_caps |= MMC_MODE_8BIT; + case 4: + slot->cfg.host_caps |= MMC_MODE_4BIT; + case 1: + slot->cfg.host_caps |= MMC_MODE_1BIT; + break; + } + if (ofnode_read_bool(node, "no-1-8-v")) { + slot->is_3_3v = true; + slot->is_1_8v = false; + if (!(slot->cfg.voltages & (MMC_VDD_32_33 | MMC_VDD_33_34))) + pr_warn("%s(%s): voltages indicate 3.3v but 3.3v not supported\n", + __func__, dev->name); + } + if (ofnode_read_bool(node, "mmc-ddr-3-3v")) { + slot->is_3_3v = true; + slot->is_1_8v = false; + if (!(slot->cfg.voltages & (MMC_VDD_32_33 | MMC_VDD_33_34))) + pr_warn("%s(%s): voltages indicate 3.3v but 3.3v not supported\n", + __func__, dev->name); + } + if (ofnode_read_bool(node, "cap-sd-highspeed") || + ofnode_read_bool(node, "cap-mmc-highspeed") || + ofnode_read_bool(node, "sd-uhs-sdr25")) + slot->cfg.host_caps |= MMC_MODE_HS; + if (slot->cfg.f_max >= 50000000 && + slot->cfg.host_caps & MMC_MODE_HS) + slot->cfg.host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS; + if (ofnode_read_bool(node, "sd-uhs-sdr50")) + slot->cfg.host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS; + if (ofnode_read_bool(node, "sd-uhs-ddr50")) + slot->cfg.host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz | + MMC_MODE_DDR_52MHz; + + if (IS_ENABLED(CONFIG_ARCH_OCTEONTX2)) { + if (!slot->is_asim && !slot->is_emul) { + if (ofnode_read_bool(node, "mmc-hs200-1_8v")) + slot->cfg.host_caps |= MMC_MODE_HS200 | + MMC_MODE_HS_52MHz; + if (ofnode_read_bool(node, "mmc-hs400-1_8v")) + slot->cfg.host_caps |= MMC_MODE_HS400 | + MMC_MODE_HS_52MHz | + MMC_MODE_HS200 | + MMC_MODE_DDR_52MHz; + slot->cmd_out_hs200_delay = + ofnode_read_u32_default(node, + "marvell,cmd-out-hs200-dly", + MMC_DEFAULT_HS200_CMD_OUT_DLY); + debug("%s(%s): HS200 cmd out delay: %d\n", + __func__, dev->name, slot->cmd_out_hs200_delay); + slot->data_out_hs200_delay = + ofnode_read_u32_default(node, + "marvell,data-out-hs200-dly", + MMC_DEFAULT_HS200_DATA_OUT_DLY); + debug("%s(%s): HS200 data out delay: %d\n", + __func__, dev->name, slot->data_out_hs200_delay); + slot->cmd_out_hs400_delay = + ofnode_read_u32_default(node, + "marvell,cmd-out-hs400-dly", + MMC_DEFAULT_HS400_CMD_OUT_DLY); + debug("%s(%s): HS400 cmd out delay: %d\n", + __func__, dev->name, slot->cmd_out_hs400_delay); + slot->data_out_hs400_delay = + ofnode_read_u32_default(node, + "marvell,data-out-hs400-dly", + MMC_DEFAULT_HS400_DATA_OUT_DLY); + debug("%s(%s): HS400 data out delay: %d\n", + __func__, dev->name, slot->data_out_hs400_delay); + } + } + + slot->disable_ddr = ofnode_read_bool(node, "marvell,disable-ddr"); + slot->non_removable = ofnode_read_bool(node, "non-removable"); + slot->cmd_clk_skew = ofnode_read_u32_default(node, + "cavium,cmd-clk-skew", 0); + slot->dat_clk_skew = ofnode_read_u32_default(node, + "cavium,dat-clk-skew", 0); + debug("%s(%s): host caps: 0x%x\n", __func__, + dev->name, slot->cfg.host_caps); + return 0; +} + +/** + * Probes a MMC slot + * + * @param dev mmc device + * + * @return 0 for success, error otherwise + */ +static int octeontx_mmc_slot_probe(struct udevice *dev) +{ + struct octeontx_mmc_slot *slot; + struct mmc *mmc; + int err; + + printk("%s (%d)\n", __func__, __LINE__); // test-only + debug("%s(%s)\n", __func__, dev->name); + if (!host_probed) { + pr_err("%s(%s): Error: host not probed yet\n", + __func__, dev->name); + } + slot = dev_to_mmc_slot(dev); + mmc = &slot->mmc; + mmc->dev = dev; + + slot->valid = false; + if (!octeontx_mmc_get_valid(dev)) { + debug("%s(%s): slot is invalid\n", __func__, dev->name); + return -ENODEV; + } + + debug("%s(%s): Getting config\n", __func__, dev->name); + err = octeontx_mmc_get_config(dev); + if (err) { + pr_err("probe(%s): Error getting config\n", dev->name); + return err; + } + + debug("%s(%s): mmc bind, mmc: %p\n", __func__, dev->name, &slot->mmc); + err = mmc_bind(dev, &slot->mmc, &slot->cfg); + if (err) { + pr_err("%s(%s): Error binding mmc\n", __func__, dev->name); + return -1; + } + + /* For some reason, mmc_bind always assigns priv to the device */ + slot->mmc.priv = slot; + + debug("%s(%s): lowlevel init\n", __func__, dev->name); + err = octeontx_mmc_init_lowlevel(mmc); + if (err) { + pr_err("probe(%s): Low-level init failed\n", dev->name); + return err; + } + + slot->valid = true; + + debug("%s(%s):\n" + " base address : %p\n" + " bus id : %d\n", __func__, dev->name, + slot->base_addr, slot->bus_id); + + return err; +} + +/** + * MMC slot driver operations + */ +static const struct dm_mmc_ops octeontx_hsmmc_ops = { + .send_cmd = octeontx_mmc_dev_send_cmd, + .set_ios = octeontx_mmc_set_ios, + .get_cd = octeontx_mmc_get_cd, + .get_wp = octeontx_mmc_get_wp, +#ifdef MMC_SUPPORTS_TUNING + .execute_tuning = octeontx_mmc_execute_tuning, +#endif +}; + +static const struct udevice_id octeontx_hsmmc_ids[] = { + { .compatible = "mmc-slot" }, + { } +}; + +U_BOOT_DRIVER(octeontx_hsmmc_slot) = { + .name = "octeontx_hsmmc_slot", + .id = UCLASS_MMC, + .of_match = of_match_ptr(octeontx_hsmmc_ids), + .probe = octeontx_mmc_slot_probe, + .ops = &octeontx_hsmmc_ops, +}; + +/***************************************************************** + * PCI host driver + * + * The PCI host driver contains the resources used by all of the + * slot drivers. + * + * The slot drivers are pseudo drivers. + */ + +/** + * Probe the MMC host controller + * + * @param dev mmc host controller device + * + * @return 0 for success, -1 on error + */ +static int octeontx_mmc_host_probe(struct udevice *dev) +{ + pci_dev_t bdf = dm_pci_get_bdf(dev); + struct octeontx_mmc_host *host = dev_get_priv(dev); + union mio_emm_int emm_int; + u8 rev; + + debug("%s(%s): Entry host: %p\n", __func__, dev->name, host); + + if (!octeontx_mmc_get_valid(dev)) { + debug("%s(%s): mmc host not valid\n", __func__, dev->name); + return -ENODEV; + } + memset(host, 0, sizeof(*host)); + host->base_addr = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0, + PCI_REGION_MEM); + if (!host->base_addr) { + pr_err("%s: Error: MMC base address not found\n", __func__); + return -1; + } + host->dev = dev; + debug("%s(%s): Base address: %p\n", __func__, dev->name, + host->base_addr); + if (!dev_has_of_node(dev)) { + pr_err("%s: No device tree information found\n", __func__); + return -1; + } + host->node = dev->node; + dev->req_seq = PCI_FUNC(bdf); + host->last_slotid = -1; + if (otx_is_platform(PLATFORM_ASIM)) + host->is_asim = true; + if (otx_is_platform(PLATFORM_EMULATOR)) + host->is_emul = true; + host->dma_wait_delay = + ofnode_read_u32_default(dev->node, "marvell,dma-wait-delay", 1); + /* Force reset of eMMC */ + writeq(0, host->base_addr + MIO_EMM_CFG()); + debug("%s: Clearing MIO_EMM_CFG\n", __func__); + udelay(100); + emm_int.u = readq(host->base_addr + MIO_EMM_INT()); + debug("%s: Writing 0x%llx to MIO_EMM_INT\n", __func__, emm_int.u); + writeq(emm_int.u, host->base_addr + MIO_EMM_INT()); + + debug("%s(%s): Getting I/O clock\n", __func__, dev->name); + host->sys_freq = octeontx_get_io_clock(); + debug("%s(%s): I/O clock %llu\n", __func__, dev->name, host->sys_freq); + + if (IS_ENABLED(CONFIG_ARCH_OCTEONTX2)) { + /* Flags for issues to work around */ + dm_pci_read_config8(dev, PCI_REVISION_ID, &rev); + if (otx_is_soc(CN96XX)) { + debug("%s: CN96XX revision %d\n", __func__, rev); + switch (rev) { + case 0: + host->calibrate_glitch = true; + host->cond_clock_glitch = true; + break; + case 1: + break; + case 2: + break; + case 0x10: /* C0 */ + host->hs400_skew_needed = true; + debug("HS400 skew support enabled\n"); + fallthrough; + default: + debug("CN96XX rev C0+ detected\n"); + host->tap_requires_noclk = true; + break; + } + } else if (otx_is_soc(CN95XX)) { + if (!rev) + host->cond_clock_glitch = true; + } + } + + host_probed = true; + + return 0; +} + +/** + * This performs some initial setup before a probe occurs. + * + * @param dev: MMC slot device + * + * @return 0 for success, -1 on failure + * + * Do some pre-initialization before probing a slot. + */ +static int octeontx_mmc_host_child_pre_probe(struct udevice *dev) +{ + struct octeontx_mmc_host *host = dev_get_priv(dev_get_parent(dev)); + struct octeontx_mmc_slot *slot; + struct mmc_uclass_priv *upriv; + ofnode node = dev->node; + u32 bus_id; + char name[16]; + int err; + + debug("%s(%s) Pre-Probe\n", __func__, dev->name); + if (ofnode_read_u32(node, "reg", &bus_id)) { + pr_err("%s(%s): Error: \"reg\" not found in device tree\n", + __func__, dev->name); + return -1; + } + if (bus_id > OCTEONTX_MAX_MMC_SLOT) { + pr_err("%s(%s): Error: \"reg\" out of range of 0..%d\n", + __func__, dev->name, OCTEONTX_MAX_MMC_SLOT); + return -1; + } + + slot = &host->slots[bus_id]; + dev->priv = slot; + slot->host = host; + slot->bus_id = bus_id; + slot->dev = dev; + slot->base_addr = host->base_addr; + slot->is_asim = host->is_asim; + slot->is_emul = host->is_emul; + + snprintf(name, sizeof(name), "octeontx-mmc%d", bus_id); + err = device_set_name(dev, name); + + if (!dev->uclass_priv) { + debug("%s(%s): Allocating uclass priv\n", __func__, + dev->name); + upriv = calloc(1, sizeof(struct mmc_uclass_priv)); + if (!upriv) + return -ENOMEM; + dev->uclass_priv = upriv; + dev->uclass->priv = upriv; + } else { + upriv = dev->uclass_priv; + } + + upriv->mmc = &slot->mmc; + debug("%s: uclass priv: %p, mmc: %p\n", dev->name, upriv, upriv->mmc); + + debug("%s: ret: %d\n", __func__, err); + return err; +} + +static const struct udevice_id octeontx_hsmmc_host_ids[] = { + { .compatible = "cavium,thunder-8890-mmc" }, + { } +}; + +U_BOOT_DRIVER(octeontx_hsmmc_host) = { + .name = "octeontx_hsmmc_host", + .id = UCLASS_MISC, + .of_match = of_match_ptr(octeontx_hsmmc_host_ids), + .probe = octeontx_mmc_host_probe, + .priv_auto_alloc_size = sizeof(struct octeontx_mmc_host), + .child_pre_probe = octeontx_mmc_host_child_pre_probe, + .flags = DM_FLAG_PRE_RELOC, +}; + +static struct pci_device_id octeontx_mmc_supported[] = { + { PCI_VDEVICE(CAVIUM, PCI_DEVICE_ID_CAVIUM_EMMC) }, + { }, +}; + +U_BOOT_PCI_DEVICE(octeontx_hsmmc_host, octeontx_mmc_supported); |