Lines Matching +full:meson +full:- +full:gxbb +full:- +full:mmc
1 // SPDX-License-Identifier: GPL-2.0-only
17 #include <linux/dma-mapping.h>
18 #include <linux/mmc/host.h>
19 #include <linux/mmc/mmc.h>
20 #include <linux/mmc/sdio.h>
21 #include <linux/mmc/slot-gpio.h>
24 #include <linux/clk-provider.h>
31 #define DRIVER_NAME "meson-gx-mmc"
49 #define CLK_TX_DELAY_MASK(h) (h->data->tx_delay_mask)
50 #define CLK_RX_DELAY_MASK(h) (h->data->rx_delay_mask)
51 #define CLK_ALWAYS_ON(h) (h->data->always_on)
151 struct mmc_host *mmc; member
205 unsigned int timeout = data->timeout_ns / NSEC_PER_MSEC; in meson_mmc_get_timeout_msecs()
217 if (cmd->opcode == MMC_SET_BLOCK_COUNT && !cmd->error) in meson_mmc_get_next_command()
218 return cmd->mrq->cmd; in meson_mmc_get_next_command()
219 else if (mmc_op_multi(cmd->opcode) && in meson_mmc_get_next_command()
220 (!cmd->mrq->sbc || cmd->error || cmd->data->error)) in meson_mmc_get_next_command()
221 return cmd->mrq->stop; in meson_mmc_get_next_command()
226 static void meson_mmc_get_transfer_mode(struct mmc_host *mmc, in meson_mmc_get_transfer_mode() argument
229 struct meson_host *host = mmc_priv(mmc); in meson_mmc_get_transfer_mode()
230 struct mmc_data *data = mrq->data; in meson_mmc_get_transfer_mode()
240 if (host->dram_access_quirk) in meson_mmc_get_transfer_mode()
244 * Broken SDIO with AP6255-based WiFi on Khadas VIM Pro has been in meson_mmc_get_transfer_mode()
249 if (mrq->cmd->opcode == SD_IO_RW_EXTENDED) in meson_mmc_get_transfer_mode()
252 for_each_sg(data->sg, sg, data->sg_len, i) in meson_mmc_get_transfer_mode()
254 if (sg->offset & 7) { in meson_mmc_get_transfer_mode()
261 data->host_cookie |= SD_EMMC_DESC_CHAIN_MODE; in meson_mmc_get_transfer_mode()
266 return data->host_cookie & SD_EMMC_DESC_CHAIN_MODE; in meson_mmc_desc_chain_mode()
271 return data && data->flags & MMC_DATA_READ && in meson_mmc_bounce_buf_read()
275 static void meson_mmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq) in meson_mmc_pre_req() argument
277 struct mmc_data *data = mrq->data; in meson_mmc_pre_req()
282 meson_mmc_get_transfer_mode(mmc, mrq); in meson_mmc_pre_req()
283 data->host_cookie |= SD_EMMC_PRE_REQ_DONE; in meson_mmc_pre_req()
288 data->sg_count = dma_map_sg(mmc_dev(mmc), data->sg, data->sg_len, in meson_mmc_pre_req()
290 if (!data->sg_count) in meson_mmc_pre_req()
291 dev_err(mmc_dev(mmc), "dma_map_sg failed"); in meson_mmc_pre_req()
294 static void meson_mmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq, in meson_mmc_post_req() argument
297 struct mmc_data *data = mrq->data; in meson_mmc_post_req()
299 if (data && meson_mmc_desc_chain_mode(data) && data->sg_count) in meson_mmc_post_req()
300 dma_unmap_sg(mmc_dev(mmc), data->sg, data->sg_len, in meson_mmc_post_req()
305 * Gating the clock on this controller is tricky. It seems the mmc clock
314 if (host->pins_clk_gate) { in meson_mmc_clk_gate()
315 pinctrl_select_state(host->pinctrl, host->pins_clk_gate); in meson_mmc_clk_gate()
318 * If the pinmux is not provided - default to the classic and in meson_mmc_clk_gate()
321 cfg = readl(host->regs + SD_EMMC_CFG); in meson_mmc_clk_gate()
323 writel(cfg, host->regs + SD_EMMC_CFG); in meson_mmc_clk_gate()
331 if (host->pins_clk_gate) in meson_mmc_clk_ungate()
332 pinctrl_select_default_state(host->dev); in meson_mmc_clk_ungate()
335 cfg = readl(host->regs + SD_EMMC_CFG); in meson_mmc_clk_ungate()
337 writel(cfg, host->regs + SD_EMMC_CFG); in meson_mmc_clk_ungate()
343 struct mmc_host *mmc = host->mmc; in meson_mmc_clk_set() local
347 /* Same request - bail-out */ in meson_mmc_clk_set()
348 if (host->ddr == ddr && host->req_rate == rate) in meson_mmc_clk_set()
353 host->req_rate = 0; in meson_mmc_clk_set()
354 mmc->actual_clock = 0; in meson_mmc_clk_set()
361 cfg = readl(host->regs + SD_EMMC_CFG); in meson_mmc_clk_set()
363 writel(cfg, host->regs + SD_EMMC_CFG); in meson_mmc_clk_set()
372 writel(cfg, host->regs + SD_EMMC_CFG); in meson_mmc_clk_set()
373 host->ddr = ddr; in meson_mmc_clk_set()
375 ret = clk_set_rate(host->mmc_clk, rate); in meson_mmc_clk_set()
377 dev_err(host->dev, "Unable to set cfg_div_clk to %lu. ret=%d\n", in meson_mmc_clk_set()
382 host->req_rate = rate; in meson_mmc_clk_set()
383 mmc->actual_clock = clk_get_rate(host->mmc_clk); in meson_mmc_clk_set()
387 host->req_rate >>= 1; in meson_mmc_clk_set()
388 mmc->actual_clock >>= 1; in meson_mmc_clk_set()
391 dev_dbg(host->dev, "clk rate: %u Hz\n", mmc->actual_clock); in meson_mmc_clk_set()
392 if (rate != mmc->actual_clock) in meson_mmc_clk_set()
393 dev_dbg(host->dev, "requested rate was %lu\n", rate); in meson_mmc_clk_set()
403 * generating the MMC clock. Use the clock framework to create and
423 writel(clk_reg, host->regs + SD_EMMC_CLOCK); in meson_mmc_clk_init()
431 clk = devm_clk_get(host->dev, name); in meson_mmc_clk_init()
433 return dev_err_probe(host->dev, PTR_ERR(clk), in meson_mmc_clk_init()
440 mux = devm_kzalloc(host->dev, sizeof(*mux), GFP_KERNEL); in meson_mmc_clk_init()
442 return -ENOMEM; in meson_mmc_clk_init()
444 snprintf(clk_name, sizeof(clk_name), "%s#mux", dev_name(host->dev)); in meson_mmc_clk_init()
451 mux->reg = host->regs + SD_EMMC_CLOCK; in meson_mmc_clk_init()
452 mux->shift = __ffs(CLK_SRC_MASK); in meson_mmc_clk_init()
453 mux->mask = CLK_SRC_MASK >> mux->shift; in meson_mmc_clk_init()
454 mux->hw.init = &init; in meson_mmc_clk_init()
456 host->mux_clk = devm_clk_register(host->dev, &mux->hw); in meson_mmc_clk_init()
457 if (WARN_ON(IS_ERR(host->mux_clk))) in meson_mmc_clk_init()
458 return PTR_ERR(host->mux_clk); in meson_mmc_clk_init()
461 div = devm_kzalloc(host->dev, sizeof(*div), GFP_KERNEL); in meson_mmc_clk_init()
463 return -ENOMEM; in meson_mmc_clk_init()
465 snprintf(clk_name, sizeof(clk_name), "%s#div", dev_name(host->dev)); in meson_mmc_clk_init()
469 clk_parent[0] = __clk_get_name(host->mux_clk); in meson_mmc_clk_init()
473 div->reg = host->regs + SD_EMMC_CLOCK; in meson_mmc_clk_init()
474 div->shift = __ffs(CLK_DIV_MASK); in meson_mmc_clk_init()
475 div->width = __builtin_popcountl(CLK_DIV_MASK); in meson_mmc_clk_init()
476 div->hw.init = &init; in meson_mmc_clk_init()
477 div->flags = CLK_DIVIDER_ONE_BASED; in meson_mmc_clk_init()
479 host->mmc_clk = devm_clk_register(host->dev, &div->hw); in meson_mmc_clk_init()
480 if (WARN_ON(IS_ERR(host->mmc_clk))) in meson_mmc_clk_init()
481 return PTR_ERR(host->mmc_clk); in meson_mmc_clk_init()
484 host->mmc->f_min = clk_round_rate(host->mmc_clk, 400000); in meson_mmc_clk_init()
485 ret = clk_set_rate(host->mmc_clk, host->mmc->f_min); in meson_mmc_clk_init()
489 return clk_prepare_enable(host->mmc_clk); in meson_mmc_clk_init()
494 unsigned int val = readl(host->regs + host->data->adjust); in meson_mmc_disable_resampling()
497 writel(val, host->regs + host->data->adjust); in meson_mmc_disable_resampling()
506 val = readl(host->regs + host->data->adjust); in meson_mmc_reset_resampling()
508 writel(val, host->regs + host->data->adjust); in meson_mmc_reset_resampling()
511 static int meson_mmc_resampling_tuning(struct mmc_host *mmc, u32 opcode) in meson_mmc_resampling_tuning() argument
513 struct meson_host *host = mmc_priv(mmc); in meson_mmc_resampling_tuning()
518 max_dly = DIV_ROUND_UP(clk_get_rate(host->mux_clk), in meson_mmc_resampling_tuning()
519 clk_get_rate(host->mmc_clk)); in meson_mmc_resampling_tuning()
521 val = readl(host->regs + host->data->adjust); in meson_mmc_resampling_tuning()
523 writel(val, host->regs + host->data->adjust); in meson_mmc_resampling_tuning()
525 if (mmc_doing_retune(mmc)) in meson_mmc_resampling_tuning()
533 writel(val, host->regs + host->data->adjust); in meson_mmc_resampling_tuning()
535 ret = mmc_send_tuning(mmc, opcode, NULL); in meson_mmc_resampling_tuning()
537 dev_dbg(mmc_dev(mmc), "resampling delay: %u\n", in meson_mmc_resampling_tuning()
544 return -EIO; in meson_mmc_resampling_tuning()
552 switch (ios->timing) { in meson_mmc_prepare_ios_clock()
563 return meson_mmc_clk_set(host, ios->clock, ddr); in meson_mmc_prepare_ios_clock()
569 switch (ios->timing) { in meson_mmc_check_resampling()
579 static void meson_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) in meson_mmc_set_ios() argument
581 struct meson_host *host = mmc_priv(mmc); in meson_mmc_set_ios()
589 switch (ios->power_mode) { in meson_mmc_set_ios()
591 if (!IS_ERR(mmc->supply.vmmc)) in meson_mmc_set_ios()
592 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); in meson_mmc_set_ios()
594 if (!IS_ERR(mmc->supply.vqmmc) && host->vqmmc_enabled) { in meson_mmc_set_ios()
595 regulator_disable(mmc->supply.vqmmc); in meson_mmc_set_ios()
596 host->vqmmc_enabled = false; in meson_mmc_set_ios()
602 if (!IS_ERR(mmc->supply.vmmc)) in meson_mmc_set_ios()
603 mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, ios->vdd); in meson_mmc_set_ios()
608 if (!IS_ERR(mmc->supply.vqmmc) && !host->vqmmc_enabled) { in meson_mmc_set_ios()
609 int ret = regulator_enable(mmc->supply.vqmmc); in meson_mmc_set_ios()
612 dev_err(host->dev, in meson_mmc_set_ios()
615 host->vqmmc_enabled = true; in meson_mmc_set_ios()
622 switch (ios->bus_width) { in meson_mmc_set_ios()
633 dev_err(host->dev, "Invalid ios->bus_width: %u. Setting to 4.\n", in meson_mmc_set_ios()
634 ios->bus_width); in meson_mmc_set_ios()
638 val = readl(host->regs + SD_EMMC_CFG); in meson_mmc_set_ios()
641 writel(val, host->regs + SD_EMMC_CFG); in meson_mmc_set_ios()
646 dev_err(host->dev, "Failed to set clock: %d\n,", err); in meson_mmc_set_ios()
648 dev_dbg(host->dev, "SD_EMMC_CFG: 0x%08x\n", val); in meson_mmc_set_ios()
651 static void meson_mmc_request_done(struct mmc_host *mmc, in meson_mmc_request_done() argument
654 struct meson_host *host = mmc_priv(mmc); in meson_mmc_request_done()
656 host->cmd = NULL; in meson_mmc_request_done()
657 if (host->needs_pre_post_req) in meson_mmc_request_done()
658 meson_mmc_post_req(mmc, mrq, 0); in meson_mmc_request_done()
659 mmc_request_done(host->mmc, mrq); in meson_mmc_request_done()
662 static void meson_mmc_set_blksz(struct mmc_host *mmc, unsigned int blksz) in meson_mmc_set_blksz() argument
664 struct meson_host *host = mmc_priv(mmc); in meson_mmc_set_blksz()
667 cfg = readl(host->regs + SD_EMMC_CFG); in meson_mmc_set_blksz()
671 dev_err(host->dev, "blksz %u is not a power of 2\n", blksz); in meson_mmc_set_blksz()
675 /* check if block-size matches, if not update */ in meson_mmc_set_blksz()
679 dev_dbg(host->dev, "%s: update blk_len %d -> %d\n", __func__, in meson_mmc_set_blksz()
684 writel(cfg, host->regs + SD_EMMC_CFG); in meson_mmc_set_blksz()
689 if (cmd->flags & MMC_RSP_PRESENT) { in meson_mmc_set_response_bits()
690 if (cmd->flags & MMC_RSP_136) in meson_mmc_set_response_bits()
694 if (!(cmd->flags & MMC_RSP_CRC)) in meson_mmc_set_response_bits()
697 if (cmd->flags & MMC_RSP_BUSY) in meson_mmc_set_response_bits()
704 static void meson_mmc_desc_chain_transfer(struct mmc_host *mmc, u32 cmd_cfg) in meson_mmc_desc_chain_transfer() argument
706 struct meson_host *host = mmc_priv(mmc); in meson_mmc_desc_chain_transfer()
707 struct sd_emmc_desc *desc = host->descs; in meson_mmc_desc_chain_transfer()
708 struct mmc_data *data = host->cmd->data; in meson_mmc_desc_chain_transfer()
713 if (data->flags & MMC_DATA_WRITE) in meson_mmc_desc_chain_transfer()
716 if (data->blocks > 1) { in meson_mmc_desc_chain_transfer()
718 meson_mmc_set_blksz(mmc, data->blksz); in meson_mmc_desc_chain_transfer()
721 for_each_sg(data->sg, sg, data->sg_count, i) { in meson_mmc_desc_chain_transfer()
724 if (data->blocks > 1) in meson_mmc_desc_chain_transfer()
725 len /= data->blksz; in meson_mmc_desc_chain_transfer()
731 desc[i].cmd_arg = host->cmd->arg; in meson_mmc_desc_chain_transfer()
735 desc[data->sg_count - 1].cmd_cfg |= CMD_CFG_END_OF_CHAIN; in meson_mmc_desc_chain_transfer()
738 start = host->descs_dma_addr | START_DESC_BUSY; in meson_mmc_desc_chain_transfer()
739 writel(start, host->regs + SD_EMMC_START); in meson_mmc_desc_chain_transfer()
747 struct scatterlist *sgl = data->sg; in meson_mmc_copy_buffer()
748 unsigned int nents = data->sg_len; in meson_mmc_copy_buffer()
764 len = min(miter.length, buflen - offset); in meson_mmc_copy_buffer()
769 writel(*buf++, host->bounce_iomem_buf + offset + buf_offset); in meson_mmc_copy_buffer()
772 left -= 4; in meson_mmc_copy_buffer()
776 *buf++ = readl(host->bounce_iomem_buf + offset + buf_offset); in meson_mmc_copy_buffer()
779 left -= 4; in meson_mmc_copy_buffer()
789 static void meson_mmc_start_cmd(struct mmc_host *mmc, struct mmc_command *cmd) in meson_mmc_start_cmd() argument
791 struct meson_host *host = mmc_priv(mmc); in meson_mmc_start_cmd()
792 struct mmc_data *data = cmd->data; in meson_mmc_start_cmd()
799 host->cmd = cmd; in meson_mmc_start_cmd()
801 cmd_cfg |= FIELD_PREP(CMD_CFG_CMD_INDEX_MASK, cmd->opcode); in meson_mmc_start_cmd()
808 data->bytes_xfered = 0; in meson_mmc_start_cmd()
814 meson_mmc_desc_chain_transfer(mmc, cmd_cfg); in meson_mmc_start_cmd()
818 if (data->blocks > 1) { in meson_mmc_start_cmd()
821 data->blocks); in meson_mmc_start_cmd()
822 meson_mmc_set_blksz(mmc, data->blksz); in meson_mmc_start_cmd()
824 cmd_cfg |= FIELD_PREP(CMD_CFG_LENGTH_MASK, data->blksz); in meson_mmc_start_cmd()
827 xfer_bytes = data->blksz * data->blocks; in meson_mmc_start_cmd()
828 if (data->flags & MMC_DATA_WRITE) { in meson_mmc_start_cmd()
830 WARN_ON(xfer_bytes > host->bounce_buf_size); in meson_mmc_start_cmd()
831 if (host->dram_access_quirk) in meson_mmc_start_cmd()
834 sg_copy_to_buffer(data->sg, data->sg_len, in meson_mmc_start_cmd()
835 host->bounce_buf, xfer_bytes); in meson_mmc_start_cmd()
839 cmd_data = host->bounce_dma_addr & CMD_DATA_MASK; in meson_mmc_start_cmd()
847 writel(cmd_cfg, host->regs + SD_EMMC_CMD_CFG); in meson_mmc_start_cmd()
848 writel(cmd_data, host->regs + SD_EMMC_CMD_DAT); in meson_mmc_start_cmd()
849 writel(0, host->regs + SD_EMMC_CMD_RSP); in meson_mmc_start_cmd()
851 writel(cmd->arg, host->regs + SD_EMMC_CMD_ARG); in meson_mmc_start_cmd()
854 static int meson_mmc_validate_dram_access(struct mmc_host *mmc, struct mmc_data *data) in meson_mmc_validate_dram_access() argument
860 for_each_sg(data->sg, sg, data->sg_len, i) { in meson_mmc_validate_dram_access()
861 if (!IS_ALIGNED(sg->offset, sizeof(u32)) || in meson_mmc_validate_dram_access()
862 !IS_ALIGNED(sg->length, sizeof(u32))) { in meson_mmc_validate_dram_access()
863 dev_err(mmc_dev(mmc), "unaligned sg offset %u len %u\n", in meson_mmc_validate_dram_access()
864 data->sg->offset, data->sg->length); in meson_mmc_validate_dram_access()
865 return -EINVAL; in meson_mmc_validate_dram_access()
872 static void meson_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) in meson_mmc_request() argument
874 struct meson_host *host = mmc_priv(mmc); in meson_mmc_request()
875 host->needs_pre_post_req = mrq->data && in meson_mmc_request()
876 !(mrq->data->host_cookie & SD_EMMC_PRE_REQ_DONE); in meson_mmc_request()
883 if (host->dram_access_quirk && mrq->data) { in meson_mmc_request()
884 mrq->cmd->error = meson_mmc_validate_dram_access(mmc, mrq->data); in meson_mmc_request()
885 if (mrq->cmd->error) { in meson_mmc_request()
886 mmc_request_done(mmc, mrq); in meson_mmc_request()
891 if (host->needs_pre_post_req) { in meson_mmc_request()
892 meson_mmc_get_transfer_mode(mmc, mrq); in meson_mmc_request()
893 if (!meson_mmc_desc_chain_mode(mrq->data)) in meson_mmc_request()
894 host->needs_pre_post_req = false; in meson_mmc_request()
897 if (host->needs_pre_post_req) in meson_mmc_request()
898 meson_mmc_pre_req(mmc, mrq); in meson_mmc_request()
901 writel(0, host->regs + SD_EMMC_START); in meson_mmc_request()
903 meson_mmc_start_cmd(mmc, mrq->sbc ?: mrq->cmd); in meson_mmc_request()
906 static void meson_mmc_read_resp(struct mmc_host *mmc, struct mmc_command *cmd) in meson_mmc_read_resp() argument
908 struct meson_host *host = mmc_priv(mmc); in meson_mmc_read_resp()
910 if (cmd->flags & MMC_RSP_136) { in meson_mmc_read_resp()
911 cmd->resp[0] = readl(host->regs + SD_EMMC_CMD_RSP3); in meson_mmc_read_resp()
912 cmd->resp[1] = readl(host->regs + SD_EMMC_CMD_RSP2); in meson_mmc_read_resp()
913 cmd->resp[2] = readl(host->regs + SD_EMMC_CMD_RSP1); in meson_mmc_read_resp()
914 cmd->resp[3] = readl(host->regs + SD_EMMC_CMD_RSP); in meson_mmc_read_resp()
915 } else if (cmd->flags & MMC_RSP_PRESENT) { in meson_mmc_read_resp()
916 cmd->resp[0] = readl(host->regs + SD_EMMC_CMD_RSP); in meson_mmc_read_resp()
928 irq_en = readl(host->regs + SD_EMMC_IRQ_EN); in meson_mmc_irq()
929 raw_status = readl(host->regs + SD_EMMC_STATUS); in meson_mmc_irq()
933 dev_dbg(host->dev, in meson_mmc_irq()
934 "Unexpected IRQ! irq_en 0x%08x - status 0x%08x\n", in meson_mmc_irq()
939 if (WARN_ON(!host) || WARN_ON(!host->cmd)) in meson_mmc_irq()
943 writel(status, host->regs + SD_EMMC_STATUS); in meson_mmc_irq()
945 cmd = host->cmd; in meson_mmc_irq()
946 data = cmd->data; in meson_mmc_irq()
947 cmd->error = 0; in meson_mmc_irq()
949 dev_dbg(host->dev, "CRC Error - status 0x%08x\n", status); in meson_mmc_irq()
950 cmd->error = -EILSEQ; in meson_mmc_irq()
956 dev_dbg(host->dev, "Timeout - status 0x%08x\n", status); in meson_mmc_irq()
957 cmd->error = -ETIMEDOUT; in meson_mmc_irq()
962 meson_mmc_read_resp(host->mmc, cmd); in meson_mmc_irq()
965 dev_dbg(host->dev, "IRQ: SDIO TODO.\n"); in meson_mmc_irq()
970 if (data && !cmd->error) in meson_mmc_irq()
971 data->bytes_xfered = data->blksz * data->blocks; in meson_mmc_irq()
977 if (cmd->error) { in meson_mmc_irq()
979 u32 start = readl(host->regs + SD_EMMC_START); in meson_mmc_irq()
982 writel(start, host->regs + SD_EMMC_START); in meson_mmc_irq()
1000 return readl_poll_timeout(host->regs + SD_EMMC_STATUS, status, in meson_mmc_wait_desc_stop()
1008 struct mmc_command *next_cmd, *cmd = host->cmd; in meson_mmc_irq_thread()
1015 if (cmd->error) { in meson_mmc_irq_thread()
1017 meson_mmc_request_done(host->mmc, cmd->mrq); in meson_mmc_irq_thread()
1022 data = cmd->data; in meson_mmc_irq_thread()
1024 xfer_bytes = data->blksz * data->blocks; in meson_mmc_irq_thread()
1025 WARN_ON(xfer_bytes > host->bounce_buf_size); in meson_mmc_irq_thread()
1026 if (host->dram_access_quirk) in meson_mmc_irq_thread()
1029 sg_copy_from_buffer(data->sg, data->sg_len, in meson_mmc_irq_thread()
1030 host->bounce_buf, xfer_bytes); in meson_mmc_irq_thread()
1035 meson_mmc_start_cmd(host->mmc, next_cmd); in meson_mmc_irq_thread()
1037 meson_mmc_request_done(host->mmc, cmd->mrq); in meson_mmc_irq_thread()
1044 * interrupts. For now, the MMC core will use this for polling.
1046 static int meson_mmc_get_cd(struct mmc_host *mmc) in meson_mmc_get_cd() argument
1048 int status = mmc_gpio_get_cd(mmc); in meson_mmc_get_cd()
1050 if (status == -ENOSYS) in meson_mmc_get_cd()
1068 writel(cfg, host->regs + SD_EMMC_CFG); in meson_mmc_cfg_init()
1071 static int meson_mmc_card_busy(struct mmc_host *mmc) in meson_mmc_card_busy() argument
1073 struct meson_host *host = mmc_priv(mmc); in meson_mmc_card_busy()
1076 regval = readl(host->regs + SD_EMMC_STATUS); in meson_mmc_card_busy()
1082 static int meson_mmc_voltage_switch(struct mmc_host *mmc, struct mmc_ios *ios) in meson_mmc_voltage_switch() argument
1087 if (!IS_ERR(mmc->supply.vqmmc)) { in meson_mmc_voltage_switch()
1095 ret = mmc_regulator_set_vqmmc(mmc, ios); in meson_mmc_voltage_switch()
1100 if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330) in meson_mmc_voltage_switch()
1103 return -EINVAL; in meson_mmc_voltage_switch()
1121 struct mmc_host *mmc; in meson_mmc_probe() local
1124 mmc = devm_mmc_alloc_host(&pdev->dev, sizeof(struct meson_host)); in meson_mmc_probe()
1125 if (!mmc) in meson_mmc_probe()
1126 return -ENOMEM; in meson_mmc_probe()
1127 host = mmc_priv(mmc); in meson_mmc_probe()
1128 host->mmc = mmc; in meson_mmc_probe()
1129 host->dev = &pdev->dev; in meson_mmc_probe()
1130 dev_set_drvdata(&pdev->dev, host); in meson_mmc_probe()
1133 host->dram_access_quirk = device_property_read_bool(&pdev->dev, in meson_mmc_probe()
1134 "amlogic,dram-access-quirk"); in meson_mmc_probe()
1137 host->vqmmc_enabled = false; in meson_mmc_probe()
1138 ret = mmc_regulator_get_supply(mmc); in meson_mmc_probe()
1142 ret = mmc_of_parse(mmc); in meson_mmc_probe()
1144 return dev_err_probe(&pdev->dev, ret, "error parsing DT\n"); in meson_mmc_probe()
1146 host->data = (struct meson_mmc_data *) in meson_mmc_probe()
1147 of_device_get_match_data(&pdev->dev); in meson_mmc_probe()
1148 if (!host->data) in meson_mmc_probe()
1149 return -EINVAL; in meson_mmc_probe()
1151 ret = device_reset_optional(&pdev->dev); in meson_mmc_probe()
1153 return dev_err_probe(&pdev->dev, ret, "device reset failed\n"); in meson_mmc_probe()
1156 host->regs = devm_ioremap_resource(&pdev->dev, res); in meson_mmc_probe()
1157 if (IS_ERR(host->regs)) in meson_mmc_probe()
1158 return PTR_ERR(host->regs); in meson_mmc_probe()
1160 host->irq = platform_get_irq(pdev, 0); in meson_mmc_probe()
1161 if (host->irq < 0) in meson_mmc_probe()
1162 return host->irq; in meson_mmc_probe()
1164 host->pinctrl = devm_pinctrl_get(&pdev->dev); in meson_mmc_probe()
1165 if (IS_ERR(host->pinctrl)) in meson_mmc_probe()
1166 return PTR_ERR(host->pinctrl); in meson_mmc_probe()
1168 host->pins_clk_gate = pinctrl_lookup_state(host->pinctrl, in meson_mmc_probe()
1169 "clk-gate"); in meson_mmc_probe()
1170 if (IS_ERR(host->pins_clk_gate)) { in meson_mmc_probe()
1171 dev_warn(&pdev->dev, in meson_mmc_probe()
1172 "can't get clk-gate pinctrl, using clk_stop bit\n"); in meson_mmc_probe()
1173 host->pins_clk_gate = NULL; in meson_mmc_probe()
1176 host->core_clk = devm_clk_get(&pdev->dev, "core"); in meson_mmc_probe()
1177 if (IS_ERR(host->core_clk)) in meson_mmc_probe()
1178 return PTR_ERR(host->core_clk); in meson_mmc_probe()
1180 ret = clk_prepare_enable(host->core_clk); in meson_mmc_probe()
1192 writel(0, host->regs + SD_EMMC_START); in meson_mmc_probe()
1195 writel(0, host->regs + SD_EMMC_IRQ_EN); in meson_mmc_probe()
1197 host->regs + SD_EMMC_STATUS); in meson_mmc_probe()
1199 host->regs + SD_EMMC_IRQ_EN); in meson_mmc_probe()
1201 ret = request_threaded_irq(host->irq, meson_mmc_irq, in meson_mmc_probe()
1203 dev_name(&pdev->dev), host); in meson_mmc_probe()
1207 mmc->caps |= MMC_CAP_CMD23; in meson_mmc_probe()
1208 if (host->dram_access_quirk) { in meson_mmc_probe()
1210 mmc->max_segs = 1; in meson_mmc_probe()
1212 mmc->max_blk_count = SD_EMMC_SRAM_DATA_BUF_LEN / in meson_mmc_probe()
1213 mmc->max_blk_size; in meson_mmc_probe()
1215 mmc->max_blk_count = CMD_CFG_LENGTH_MASK; in meson_mmc_probe()
1216 mmc->max_segs = SD_EMMC_DESC_BUF_LEN / in meson_mmc_probe()
1219 mmc->max_req_size = mmc->max_blk_count * mmc->max_blk_size; in meson_mmc_probe()
1220 mmc->max_seg_size = mmc->max_req_size; in meson_mmc_probe()
1227 mmc->caps2 &= ~MMC_CAP2_HS400; in meson_mmc_probe()
1229 if (host->dram_access_quirk) { in meson_mmc_probe()
1231 * The MMC Controller embeds 1,5KiB of internal SRAM in meson_mmc_probe()
1236 host->bounce_buf_size = SD_EMMC_SRAM_DATA_BUF_LEN; in meson_mmc_probe()
1237 host->bounce_iomem_buf = host->regs + SD_EMMC_SRAM_DATA_BUF_OFF; in meson_mmc_probe()
1238 host->bounce_dma_addr = res->start + SD_EMMC_SRAM_DATA_BUF_OFF; in meson_mmc_probe()
1241 host->bounce_buf_size = mmc->max_req_size; in meson_mmc_probe()
1242 host->bounce_buf = in meson_mmc_probe()
1243 dma_alloc_coherent(host->dev, host->bounce_buf_size, in meson_mmc_probe()
1244 &host->bounce_dma_addr, GFP_KERNEL); in meson_mmc_probe()
1245 if (host->bounce_buf == NULL) { in meson_mmc_probe()
1246 dev_err(host->dev, "Unable to map allocate DMA bounce buffer.\n"); in meson_mmc_probe()
1247 ret = -ENOMEM; in meson_mmc_probe()
1252 host->descs = dma_alloc_coherent(host->dev, SD_EMMC_DESC_BUF_LEN, in meson_mmc_probe()
1253 &host->descs_dma_addr, GFP_KERNEL); in meson_mmc_probe()
1254 if (!host->descs) { in meson_mmc_probe()
1255 dev_err(host->dev, "Allocating descriptor DMA buffer failed\n"); in meson_mmc_probe()
1256 ret = -ENOMEM; in meson_mmc_probe()
1260 mmc->ops = &meson_mmc_ops; in meson_mmc_probe()
1261 ret = mmc_add_host(mmc); in meson_mmc_probe()
1268 if (!host->dram_access_quirk) in meson_mmc_probe()
1269 dma_free_coherent(host->dev, host->bounce_buf_size, in meson_mmc_probe()
1270 host->bounce_buf, host->bounce_dma_addr); in meson_mmc_probe()
1272 free_irq(host->irq, host); in meson_mmc_probe()
1274 clk_disable_unprepare(host->mmc_clk); in meson_mmc_probe()
1276 clk_disable_unprepare(host->core_clk); in meson_mmc_probe()
1282 struct meson_host *host = dev_get_drvdata(&pdev->dev); in meson_mmc_remove()
1284 mmc_remove_host(host->mmc); in meson_mmc_remove()
1287 writel(0, host->regs + SD_EMMC_IRQ_EN); in meson_mmc_remove()
1288 free_irq(host->irq, host); in meson_mmc_remove()
1290 dma_free_coherent(host->dev, SD_EMMC_DESC_BUF_LEN, in meson_mmc_remove()
1291 host->descs, host->descs_dma_addr); in meson_mmc_remove()
1293 if (!host->dram_access_quirk) in meson_mmc_remove()
1294 dma_free_coherent(host->dev, host->bounce_buf_size, in meson_mmc_remove()
1295 host->bounce_buf, host->bounce_dma_addr); in meson_mmc_remove()
1297 clk_disable_unprepare(host->mmc_clk); in meson_mmc_remove()
1298 clk_disable_unprepare(host->core_clk); in meson_mmc_remove()
1318 { .compatible = "amlogic,meson-gx-mmc", .data = &meson_gx_data },
1319 { .compatible = "amlogic,meson-gxbb-mmc", .data = &meson_gx_data },
1320 { .compatible = "amlogic,meson-gxl-mmc", .data = &meson_gx_data },
1321 { .compatible = "amlogic,meson-gxm-mmc", .data = &meson_gx_data },
1322 { .compatible = "amlogic,meson-axg-mmc", .data = &meson_axg_data },