[PATCH 2/7] mmc: mediatek: Add Mediatek MMC driver
Chaotian Jing
chaotian.jing at mediatek.com
Mon Jan 26 22:15:27 PST 2015
Add Mediatek MMC driver code
Signed-off-by: Chaotian Jing <chaotian.jing at mediatek.com>
---
drivers/mmc/host/Kconfig | 8 +
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/mtk-sd.c | 1786 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 1795 insertions(+)
create mode 100644 drivers/mmc/host/mtk-sd.c
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 2d6fbdd..c37b705 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -753,3 +753,11 @@ config MMC_TOSHIBA_PCI
tristate "Toshiba Type A SD/MMC Card Interface Driver"
depends on PCI
help
+
+config MMC_MTK
+ tristate "MediaTek SD/MMC Card Interface support"
+ help
+ This selects the MediaTek(R) Secure digital and Multimedia card Interface.
+ If you have a machine with a integrated SD/MMC card reader, say Y or M here.
+ This is needed if support for any SD/SDIO/MMC devices is required.
+ If unsure, say N.
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index f7b0a77..f55f299 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_MMC_SDHCI_SIRF) += sdhci-sirf.o
obj-$(CONFIG_MMC_SDHCI_SPEAR) += sdhci-spear.o
obj-$(CONFIG_MMC_WBSD) += wbsd.o
obj-$(CONFIG_MMC_AU1X) += au1xmmc.o
+obj-$(CONFIG_MMC_MTK) += mtk-sd.o
obj-$(CONFIG_MMC_OMAP) += omap.o
obj-$(CONFIG_MMC_OMAP_HS) += omap_hsmmc.o
obj-$(CONFIG_MMC_ATMELMCI) += atmel-mci.o
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
new file mode 100644
index 0000000..d08e1df
--- /dev/null
+++ b/drivers/mmc/host/mtk-sd.c
@@ -0,0 +1,1786 @@
+/*
+ * Copyright (c) 2014-2015 MediaTek Inc.
+ * Author: Chaotian.Jing <chaotian.jing at mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/spinlock.h>
+#include <linux/platform_device.h>
+#include <linux/workqueue.h>
+#include <linux/gpio.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_gpio.h>
+#include <linux/bitops.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/core.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sd.h>
+#include <linux/mmc/sdio.h>
+
+#define MAX_GPD_NUM (1 + 1) /* one null gpd */
+#define MAX_BD_NUM 1024
+#define MAX_BD_PER_GPD MAX_BD_NUM
+
+#define MSDC_AUTOCMD23 0x02
+#define MSDC_AUTOCMD19 0x03
+
+/*--------------------------------------------------------------------------*/
+/* Common Definition */
+/*--------------------------------------------------------------------------*/
+#define MSDC_FIFO_SZ 128
+#define MSDC_FIFO_THD 64
+
+#define MSDC_MS 0
+#define MSDC_SDMMC 1
+
+#define MSDC_MODE_UNKNOWN 0
+#define MSDC_MODE_PIO 1
+#define MSDC_MODE_DMA_BASIC 2
+#define MSDC_MODE_DMA_DESC 3
+#define MSDC_MODE_DMA_ENHANCED 4
+#define MSDC_MODE_MMC_STREAM 5
+
+#define MSDC_BUS_1BITS 0
+#define MSDC_BUS_4BITS 1
+#define MSDC_BUS_8BITS 2
+
+#define MSDC_BURST_8B 3
+#define MSDC_BURST_16B 4
+#define MSDC_BURST_32B 5
+#define MSDC_BURST_64B 6
+
+#define MSDC_EMMC_BOOTMODE0 0 /* Pull low CMD mode */
+#define MSDC_EMMC_BOOTMODE1 1 /* Reset CMD mode */
+
+enum {
+ RESP_NONE = 0,
+ RESP_R1 = 1,
+ RESP_R2 = 2,
+ RESP_R3 = 3,
+ RESP_R4 = 4,
+ RESP_R5 = 1,
+ RESP_R6 = 1,
+ RESP_R7 = 1,
+ RESP_R1B = 7
+};
+
+/*--------------------------------------------------------------------------*/
+/* Register Offset */
+/*--------------------------------------------------------------------------*/
+#define MSDC_CFG 0x0
+#define MSDC_IOCON 0x04
+#define MSDC_PS 0x08
+#define MSDC_INT 0x0c
+#define MSDC_INTEN 0x10
+#define MSDC_FIFOCS 0x14
+#define MSDC_TXDATA 0x18
+#define MSDC_RXDATA 0x1c
+#define SDC_CFG 0x30
+#define SDC_CMD 0x34
+#define SDC_ARG 0x38
+#define SDC_STS 0x3c
+#define SDC_RESP0 0x40
+#define SDC_RESP1 0x44
+#define SDC_RESP2 0x48
+#define SDC_RESP3 0x4c
+#define SDC_BLK_NUM 0x50
+#define SDC_CSTS 0x58
+#define SDC_CSTS_EN 0x5c
+#define SDC_DCRC_STS 0x60
+#define EMMC_CFG0 0x70
+#define EMMC_CFG1 0x74
+#define EMMC_STS 0x78
+#define EMMC_IOCON 0x7c
+#define SDC_ACMD_RESP 0x80
+#define SDC_ACMD19_TRG 0x84
+#define SDC_ACMD19_STS 0x88
+#define MSDC_DMA_SA 0x90
+#define MSDC_DMA_CA 0x94
+#define MSDC_DMA_CTRL 0x98
+#define MSDC_DMA_CFG 0x9c
+#define MSDC_DBG_SEL 0xa0
+#define MSDC_DBG_OUT 0xa4
+#define MSDC_DMA_LEN 0xa8
+#define MSDC_PATCH_BIT 0xb0
+#define MSDC_PATCH_BIT1 0xb4
+#define MSDC_PAD_CTL0 0xe0
+#define MSDC_PAD_CTL1 0xe4
+#define MSDC_PAD_CTL2 0xe8
+#define MSDC_PAD_TUNE 0xec
+#define MSDC_DAT_RDDLY0 0xf0
+#define MSDC_DAT_RDDLY1 0xf4
+#define MSDC_HW_DBG 0xf8
+#define MSDC_VERSION 0x100
+#define MSDC_ECO_VER 0x104
+
+/*--------------------------------------------------------------------------*/
+/* Register Mask */
+/*--------------------------------------------------------------------------*/
+
+/* MSDC_CFG mask */
+#define MSDC_CFG_MODE (0x1 << 0) /* RW */
+#define MSDC_CFG_CKPDN (0x1 << 1) /* RW */
+#define MSDC_CFG_RST (0x1 << 2) /* RW */
+#define MSDC_CFG_PIO (0x1 << 3) /* RW */
+#define MSDC_CFG_CKDRVEN (0x1 << 4) /* RW */
+#define MSDC_CFG_BV18SDT (0x1 << 5) /* RW */
+#define MSDC_CFG_BV18PSS (0x1 << 6) /* R */
+#define MSDC_CFG_CKSTB (0x1 << 7) /* R */
+#define MSDC_CFG_CKDIV (0xff << 8) /* RW */
+#define MSDC_CFG_CKMOD (0x3 << 16) /* RW */
+
+/* MSDC_IOCON mask */
+#define MSDC_IOCON_SDR104CKS (0x1 << 0) /* RW */
+#define MSDC_IOCON_RSPL (0x1 << 1) /* RW */
+#define MSDC_IOCON_DSPL (0x1 << 2) /* RW */
+#define MSDC_IOCON_DDLSEL (0x1 << 3) /* RW */
+#define MSDC_IOCON_DDR50CKD (0x1 << 4) /* RW */
+#define MSDC_IOCON_DSPLSEL (0x1 << 5) /* RW */
+#define MSDC_IOCON_W_DSPL (0x1 << 8) /* RW */
+#define MSDC_IOCON_D0SPL (0x1 << 16) /* RW */
+#define MSDC_IOCON_D1SPL (0x1 << 17) /* RW */
+#define MSDC_IOCON_D2SPL (0x1 << 18) /* RW */
+#define MSDC_IOCON_D3SPL (0x1 << 19) /* RW */
+#define MSDC_IOCON_D4SPL (0x1 << 20) /* RW */
+#define MSDC_IOCON_D5SPL (0x1 << 21) /* RW */
+#define MSDC_IOCON_D6SPL (0x1 << 22) /* RW */
+#define MSDC_IOCON_D7SPL (0x1 << 23) /* RW */
+#define MSDC_IOCON_RISCSZ (0x3 << 24) /* RW */
+
+/* MSDC_PS mask */
+#define MSDC_PS_CDEN (0x1 << 0) /* RW */
+#define MSDC_PS_CDSTS (0x1 << 1) /* R */
+#define MSDC_PS_CDDEBOUNCE (0xf << 12) /* RW */
+#define MSDC_PS_DAT (0xff << 16) /* R */
+#define MSDC_PS_CMD (0x1 << 24) /* R */
+#define MSDC_PS_WP (0x1 << 31) /* R */
+
+/* MSDC_INT mask */
+#define MSDC_INT_MMCIRQ (0x1 << 0) /* W1C */
+#define MSDC_INT_CDSC (0x1 << 1) /* W1C */
+#define MSDC_INT_ACMDRDY (0x1 << 3) /* W1C */
+#define MSDC_INT_ACMDTMO (0x1 << 4) /* W1C */
+#define MSDC_INT_ACMDCRCERR (0x1 << 5) /* W1C */
+#define MSDC_INT_DMAQ_EMPTY (0x1 << 6) /* W1C */
+#define MSDC_INT_SDIOIRQ (0x1 << 7) /* W1C */
+#define MSDC_INT_CMDRDY (0x1 << 8) /* W1C */
+#define MSDC_INT_CMDTMO (0x1 << 9) /* W1C */
+#define MSDC_INT_RSPCRCERR (0x1 << 10) /* W1C */
+#define MSDC_INT_CSTA (0x1 << 11) /* R */
+#define MSDC_INT_XFER_COMPL (0x1 << 12) /* W1C */
+#define MSDC_INT_DXFER_DONE (0x1 << 13) /* W1C */
+#define MSDC_INT_DATTMO (0x1 << 14) /* W1C */
+#define MSDC_INT_DATCRCERR (0x1 << 15) /* W1C */
+#define MSDC_INT_ACMD19_DONE (0x1 << 16) /* W1C */
+#define MSDC_INT_DMA_BDCSERR (0x1 << 17) /* W1C */
+#define MSDC_INT_DMA_GPDCSERR (0x1 << 18) /* W1C */
+#define MSDC_INT_DMA_PROTECT (0x1 << 19) /* W1C */
+
+/* MSDC_INTEN mask */
+#define MSDC_INTEN_MMCIRQ (0x1 << 0) /* RW */
+#define MSDC_INTEN_CDSC (0x1 << 1) /* RW */
+#define MSDC_INTEN_ACMDRDY (0x1 << 3) /* RW */
+#define MSDC_INTEN_ACMDTMO (0x1 << 4) /* RW */
+#define MSDC_INTEN_ACMDCRCERR (0x1 << 5) /* RW */
+#define MSDC_INTEN_DMAQ_EMPTY (0x1 << 6) /* RW */
+#define MSDC_INTEN_SDIOIRQ (0x1 << 7) /* RW */
+#define MSDC_INTEN_CMDRDY (0x1 << 8) /* RW */
+#define MSDC_INTEN_CMDTMO (0x1 << 9) /* RW */
+#define MSDC_INTEN_RSPCRCERR (0x1 << 10) /* RW */
+#define MSDC_INTEN_CSTA (0x1 << 11) /* RW */
+#define MSDC_INTEN_XFER_COMPL (0x1 << 12) /* RW */
+#define MSDC_INTEN_DXFER_DONE (0x1 << 13) /* RW */
+#define MSDC_INTEN_DATTMO (0x1 << 14) /* RW */
+#define MSDC_INTEN_DATCRCERR (0x1 << 15) /* RW */
+#define MSDC_INTEN_ACMD19_DONE (0x1 << 16) /* RW */
+#define MSDC_INTEN_DMA_BDCSERR (0x1 << 17) /* RW */
+#define MSDC_INTEN_DMA_GPDCSERR (0x1 << 18) /* RW */
+#define MSDC_INTEN_DMA_PROTECT (0x1 << 19) /* RW */
+
+/* MSDC_FIFOCS mask */
+#define MSDC_FIFOCS_RXCNT (0xff << 0) /* R */
+#define MSDC_FIFOCS_TXCNT (0xff << 16) /* R */
+#define MSDC_FIFOCS_CLR (0x1 << 31) /* RW */
+
+/* SDC_CFG mask */
+#define SDC_CFG_SDIOINTWKUP (0x1 << 0) /* RW */
+#define SDC_CFG_INSWKUP (0x1 << 1) /* RW */
+#define SDC_CFG_BUSWIDTH (0x3 << 16) /* RW */
+#define SDC_CFG_SDIO (0x1 << 19) /* RW */
+#define SDC_CFG_SDIOIDE (0x1 << 20) /* RW */
+#define SDC_CFG_INTATGAP (0x1 << 21) /* RW */
+#define SDC_CFG_DTOC (0xff << 24) /* RW */
+
+/* SDC_CMD mask */
+#define SDC_CMD_OPC (0x3f << 0) /* RW */
+#define SDC_CMD_BRK (0x1 << 6) /* RW */
+#define SDC_CMD_RSPTYP (0x7 << 7) /* RW */
+#define SDC_CMD_DTYP (0x3 << 11) /* RW */
+#define SDC_CMD_RW (0x1 << 13) /* RW */
+#define SDC_CMD_STOP (0x1 << 14) /* RW */
+#define SDC_CMD_GOIRQ (0x1 << 15) /* RW */
+#define SDC_CMD_BLKLEN (0xfff << 16) /* RW */
+#define SDC_CMD_AUTOCMD (0x3 << 28) /* RW */
+#define SDC_CMD_VOLSWTH (0x1 << 30) /* RW */
+
+/* SDC_STS mask */
+#define SDC_STS_SDCBUSY (0x1 << 0) /* RW */
+#define SDC_STS_CMDBUSY (0x1 << 1) /* RW */
+#define SDC_STS_SWR_COMPL (0x1 << 31) /* RW */
+
+/* SDC_DCRC_STS mask */
+#define SDC_DCRC_STS_NEG (0xff << 8) /* RO */
+#define SDC_DCRC_STS_POS (0xff << 0) /* RO */
+
+/* EMMC_CFG0 mask */
+#define EMMC_CFG0_BOOTSTART (0x1 << 0) /* W */
+#define EMMC_CFG0_BOOTSTOP (0x1 << 1) /* W */
+#define EMMC_CFG0_BOOTMODE (0x1 << 2) /* RW */
+#define EMMC_CFG0_BOOTACKDIS (0x1 << 3) /* RW */
+#define EMMC_CFG0_BOOTWDLY (0x7 << 12) /* RW */
+#define EMMC_CFG0_BOOTSUPP (0x1 << 15) /* RW */
+
+/* EMMC_CFG1 mask */
+#define EMMC_CFG1_BOOTDATTMC (0xfffff << 0) /* RW */
+#define EMMC_CFG1_BOOTACKTMC (0xfff << 20) /* RW */
+
+/* EMMC_STS mask */
+#define EMMC_STS_BOOTCRCERR (0x1 << 0) /* W1C */
+#define EMMC_STS_BOOTACKERR (0x1 << 1) /* W1C */
+#define EMMC_STS_BOOTDATTMO (0x1 << 2) /* W1C */
+#define EMMC_STS_BOOTACKTMO (0x1 << 3) /* W1C */
+#define EMMC_STS_BOOTUPSTATE (0x1 << 4) /* R */
+#define EMMC_STS_BOOTACKRCV (0x1 << 5) /* W1C */
+#define EMMC_STS_BOOTDATRCV (0x1 << 6) /* R */
+
+/* EMMC_IOCON mask */
+#define EMMC_IOCON_BOOTRST (0x1 << 0) /* RW */
+
+/* SDC_ACMD19_TRG mask */
+#define SDC_ACMD19_TRG_TUNESEL (0xf << 0) /* RW */
+
+/* MSDC_DMA_CTRL mask */
+#define MSDC_DMA_CTRL_START (0x1 << 0) /* W */
+#define MSDC_DMA_CTRL_STOP (0x1 << 1) /* W */
+#define MSDC_DMA_CTRL_RESUME (0x1 << 2) /* W */
+#define MSDC_DMA_CTRL_MODE (0x1 << 8) /* RW */
+#define MSDC_DMA_CTRL_LASTBUF (0x1 << 10) /* RW */
+#define MSDC_DMA_CTRL_BRUSTSZ (0x7 << 12) /* RW */
+
+/* MSDC_DMA_CFG mask */
+#define MSDC_DMA_CFG_STS (0x1 << 0) /* R */
+#define MSDC_DMA_CFG_DECSEN (0x1 << 1) /* RW */
+#define MSDC_DMA_CFG_AHBHPROT2 (0x2 << 8) /* RW */
+#define MSDC_DMA_CFG_ACTIVEEN (0x2 << 12) /* RW */
+#define MSDC_DMA_CFG_CS12B16B (0x1 << 16) /* RW */
+
+/* MSDC_PATCH_BIT mask */
+#define MSDC_PATCH_BIT_ODDSUPP (0x1 << 1) /* RW */
+#define MSDC_INT_DAT_LATCH_CK_SEL (0x7 << 7)
+#define MSDC_CKGEN_MSDC_DLY_SEL (0x1f << 10)
+#define MSDC_PATCH_BIT_IODSSEL (0x1 << 16) /* RW */
+#define MSDC_PATCH_BIT_IOINTSEL (0x1 << 17) /* RW */
+#define MSDC_PATCH_BIT_BUSYDLY (0xf << 18) /* RW */
+#define MSDC_PATCH_BIT_WDOD (0xf << 22) /* RW */
+#define MSDC_PATCH_BIT_IDRTSEL (0x1 << 26) /* RW */
+#define MSDC_PATCH_BIT_CMDFSEL (0x1 << 27) /* RW */
+#define MSDC_PATCH_BIT_INTDLSEL (0x1 << 28) /* RW */
+#define MSDC_PATCH_BIT_SPCPUSH (0x1 << 29) /* RW */
+#define MSDC_PATCH_BIT_DECRCTMO (0x1 << 30) /* RW */
+
+/* MSDC_PATCH_BIT1 mask */
+#define MSDC_PATCH_BIT1_WRDAT_CRCS (0x7 << 0)
+#define MSDC_PATCH_BIT1_CMD_RSP (0x7 << 3)
+#define MSDC_PATCH_BIT1_GET_CRC_MARGIN (0x01 << 7) /* RW */
+
+/* MSDC_PAD_CTL0 mask */
+#define MSDC_PAD_CTL0_CLKDRVN (0x7 << 0) /* RW */
+#define MSDC_PAD_CTL0_CLKDRVP (0x7 << 4) /* RW */
+#define MSDC_PAD_CTL0_CLKSR (0x1 << 8) /* RW */
+#define MSDC_PAD_CTL0_CLKPD (0x1 << 16) /* RW */
+#define MSDC_PAD_CTL0_CLKPU (0x1 << 17) /* RW */
+#define MSDC_PAD_CTL0_CLKSMT (0x1 << 18) /* RW */
+#define MSDC_PAD_CTL0_CLKIES (0x1 << 19) /* RW */
+#define MSDC_PAD_CTL0_CLKTDSEL (0xf << 20) /* RW */
+#define MSDC_PAD_CTL0_CLKRDSEL (0xff << 24) /* RW */
+
+/* MSDC_PAD_CTL1 mask */
+#define MSDC_PAD_CTL1_CMDDRVN (0x7 << 0) /* RW */
+#define MSDC_PAD_CTL1_CMDDRVP (0x7 << 4) /* RW */
+#define MSDC_PAD_CTL1_CMDSR (0x1 << 8) /* RW */
+#define MSDC_PAD_CTL1_CMDPD (0x1 << 16) /* RW */
+#define MSDC_PAD_CTL1_CMDPU (0x1 << 17) /* RW */
+#define MSDC_PAD_CTL1_CMDSMT (0x1 << 18) /* RW */
+#define MSDC_PAD_CTL1_CMDIES (0x1 << 19) /* RW */
+#define MSDC_PAD_CTL1_CMDTDSEL (0xf << 20) /* RW */
+#define MSDC_PAD_CTL1_CMDRDSEL (0xff << 24) /* RW */
+
+/* MSDC_PAD_CTL2 mask */
+#define MSDC_PAD_CTL2_DATDRVN (0x7 << 0) /* RW */
+#define MSDC_PAD_CTL2_DATDRVP (0x7 << 4) /* RW */
+#define MSDC_PAD_CTL2_DATSR (0x1 << 8) /* RW */
+#define MSDC_PAD_CTL2_DATPD (0x1 << 16) /* RW */
+#define MSDC_PAD_CTL2_DATPU (0x1 << 17) /* RW */
+#define MSDC_PAD_CTL2_DATIES (0x1 << 19) /* RW */
+#define MSDC_PAD_CTL2_DATSMT (0x1 << 18) /* RW */
+#define MSDC_PAD_CTL2_DATTDSEL (0xf << 20) /* RW */
+#define MSDC_PAD_CTL2_DATRDSEL (0xff << 24) /* RW */
+
+/* MSDC_PAD_TUNE mask */
+#define MSDC_PAD_TUNE_DATWRDLY (0x1f << 0) /* RW */
+#define MSDC_PAD_TUNE_DATRRDLY (0x1f << 8) /* RW */
+#define MSDC_PAD_TUNE_CMDRDLY (0x1f << 16) /* RW */
+#define MSDC_PAD_TUNE_CMDRRDLY (0x1f << 22) /* RW */
+#define MSDC_PAD_TUNE_CLKTXDLY (0x1f << 27) /* RW */
+
+/* MSDC_DAT_RDDLY0/1 mask */
+#define MSDC_DAT_RDDLY0_D3 (0x1f << 0) /* RW */
+#define MSDC_DAT_RDDLY0_D2 (0x1f << 8) /* RW */
+#define MSDC_DAT_RDDLY0_D1 (0x1f << 16) /* RW */
+#define MSDC_DAT_RDDLY0_D0 (0x1f << 24) /* RW */
+
+#define MSDC_DAT_RDDLY1_D7 (0x1f << 0) /* RW */
+#define MSDC_DAT_RDDLY1_D6 (0x1f << 8) /* RW */
+#define MSDC_DAT_RDDLY1_D5 (0x1f << 16) /* RW */
+#define MSDC_DAT_RDDLY1_D4 (0x1f << 24) /* RW */
+
+/*--------------------------------------------------------------------------*/
+/* Descriptor Structure */
+/*--------------------------------------------------------------------------*/
+struct mt_gpdma_desc {
+ u32 first_u32;
+#define GPDMA_DESC_HWO BIT(0)
+#define GPDMA_DESC_BDP BIT(1)
+#define GPDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */
+#define GPDMA_DESC_INT BIT(16)
+ u32 next;
+ u32 ptr;
+ u32 second_u32;
+#define GPDMA_DESC_BUFLEN (0xffff) /* bit0 ~ bit15 */
+#define GPDMA_DESC_EXTLEN (0xff << 16) /* bit16 ~ bit23 */
+ u32 arg;
+ u32 blknum;
+ u32 cmd;
+};
+
+struct mt_bdma_desc {
+ u32 first_u32;
+#define BDMA_DESC_EOL BIT(0)
+#define BDMA_DESC_CHECKSUM (0xff << 8) /* bit8 ~ bit15 */
+#define BDMA_DESC_BLKPAD BIT(17)
+#define BDMA_DESC_DWPAD BIT(18)
+ u32 next;
+ u32 ptr;
+ u32 second_u32;
+#define BDMA_DESC_BUFLEN (0xffff) /* bit0 ~ bit15 */
+};
+
+struct scatterlist_ex {
+ u32 cmd;
+ u32 arg;
+ u32 sglen;
+ struct scatterlist *sg;
+};
+
+#define DMA_FLAG_NONE 0x00000000
+#define DMA_FLAG_EN_CHKSUM 0x00000001
+#define DMA_FLAG_PAD_BLOCK 0x00000002
+#define DMA_FLAG_PAD_DWORD 0x00000004
+
+struct msdc_dma {
+ struct scatterlist *sg; /* I/O scatter list */
+
+ struct mt_gpdma_desc *gpd; /* pointer to gpd array */
+ struct mt_bdma_desc *bd; /* pointer to bd array */
+ dma_addr_t gpd_addr; /* the physical address of gpd array */
+ dma_addr_t bd_addr; /* the physical address of bd array */
+};
+
+struct msdc_host {
+ struct device *dev;
+ struct mmc_host *mmc; /* mmc structure */
+ int cmd_rsp;
+
+ struct regulator *core_power;
+ struct regulator *io_power;
+ spinlock_t lock;
+ struct mmc_request *mrq;
+ struct mmc_command *cmd;
+ struct mmc_data *data;
+ int error;
+
+ void __iomem *base; /* host base address */
+
+ struct msdc_dma dma; /* dma channel */
+
+ u32 timeout_ns; /* data timeout ns */
+ u32 timeout_clks; /* data timeout clks */
+
+ struct pinctrl *pinctrl;
+ struct pinctrl_state *pins_default;
+ struct pinctrl_state *pins_uhs;
+ struct delayed_work req_timeout;
+ int irq; /* host interrupt */
+
+ struct clk *src_clk; /* msdc source clock */
+ u32 mclk; /* mmc subsystem clock */
+ u32 hclk; /* host clock speed */
+ u32 sclk; /* SD/MS clock speed */
+ bool ddr;
+};
+
+struct dma_addr {
+ u32 start_address;
+ u32 size;
+ u8 end;
+ struct dma_addr *next;
+};
+
+static void sdr_set_bits(void __iomem *reg, u32 bs)
+{
+ u32 val = readl(reg);
+
+ val |= bs;
+ writel(val, reg);
+}
+
+static void sdr_clr_bits(void __iomem *reg, u32 bs)
+{
+ u32 val = readl(reg);
+
+ val &= ~(u32)bs;
+ writel(val, reg);
+}
+
+static void sdr_set_field(void __iomem *reg, u32 field, u32 val)
+{
+ unsigned int tv = readl(reg);
+
+ tv &= ~field;
+ tv |= ((val) << (ffs((unsigned int)field) - 1));
+ writel(tv, reg);
+}
+
+static void sdr_get_field(void __iomem *reg, u32 field, u32 val)
+{
+ unsigned int tv = readl(reg);
+
+ val = ((tv & field) >> (ffs((unsigned int)field) - 1));
+}
+
+#define REQ_CMD_EIO (0x1 << 0)
+#define REQ_CMD_TMO (0x1 << 1)
+#define REQ_DAT_ERR (0x1 << 2)
+#define REQ_STOP_EIO (0x1 << 3)
+#define REQ_STOP_TMO (0x1 << 4)
+#define REQ_CMD_BUSY (0x1 << 5)
+
+#define msdc_txfifocnt(host) \
+ ((readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_TXCNT) >> 16)
+#define msdc_rxfifocnt(host) \
+ ((readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_RXCNT) >> 0)
+
+#define sdc_is_busy(host) \
+ (readl(host->base + SDC_STS) & SDC_STS_SDCBUSY)
+#define sdc_is_cmd_busy(host) \
+ (readl(host->base + SDC_STS) & SDC_STS_CMDBUSY)
+
+#define MSDC_PREPARE_FLAG BIT(0)
+#define MSDC_ASYNC_FLAG BIT(1)
+#define MSDC_MMAP_FLAG BIT(2)
+
+static void msdc_reset_hw(struct msdc_host *host)
+{
+ u32 val;
+
+ sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_RST);
+ while (readl(host->base + MSDC_CFG) & MSDC_CFG_RST)
+ cpu_relax();
+
+ sdr_set_bits(host->base + MSDC_FIFOCS, MSDC_FIFOCS_CLR);
+ while (readl(host->base + MSDC_FIFOCS) & MSDC_FIFOCS_CLR)
+ cpu_relax();
+
+ val = readl(host->base + MSDC_INT);
+ writel(val, host->base + MSDC_INT);
+}
+
+#define HOST_MIN_MCLK 260000
+#define HOST_MAX_BLKSZ 2048
+#define MSDC_OCR_AVAIL (MMC_VDD_28_29 | MMC_VDD_29_30 \
+ | MMC_VDD_30_31 | MMC_VDD_31_32 | MMC_VDD_32_33)
+
+#define DEFAULT_DTOC 3
+#define MTK_MMC_AUTOSUSPEND_DELAY 500
+#define CMD_TIMEOUT (HZ/10 * 5) /* 100ms x5 */
+#define DAT_TIMEOUT (HZ * 5) /* 1000ms x5 */
+#define CLK_TIMEOUT (HZ * 5) /* 5s */
+/* a single transaction for WIFI may be 50K */
+#define MAX_DMA_CNT (64 * 1024 - 512)
+
+#define MAX_HW_SGMTS (MAX_BD_NUM)
+#define MAX_PHY_SGMTS (MAX_BD_NUM)
+#define MAX_SGMT_SZ (MAX_DMA_CNT)
+#define MAX_REQ_SZ (512*1024)
+
+#define VOL_3300 3300000
+#define VOL_1800 1800000
+#define CLK_RATE_200MHZ 200000000UL
+
+#define CMD23_ARG_SPECIAL 0xFFFF0000
+#define MSDC_CMD_INTS (MSDC_INTEN_CMDRDY | MSDC_INTEN_RSPCRCERR | \
+ MSDC_INTEN_CMDTMO | MSDC_INTEN_ACMDRDY | \
+ MSDC_INTEN_ACMDCRCERR | MSDC_INTEN_ACMDTMO)
+
+static void msdc_cmd_next(struct msdc_host *host,
+ struct mmc_request *mrq, struct mmc_command *cmd);
+
+static inline u32 msdc_data_ints_mask(struct msdc_host *host)
+{
+ u32 wints =
+ /* data xfer */
+ MSDC_INTEN_XFER_COMPL |
+ MSDC_INTEN_DATTMO |
+ MSDC_INTEN_DATCRCERR |
+ /* DMA events */
+ MSDC_INTEN_DMA_BDCSERR |
+ MSDC_INTEN_DMA_GPDCSERR |
+ MSDC_INTEN_DMA_PROTECT;
+
+ return wints;
+}
+
+static u8 msdc_dma_calcs(u8 *buf, u32 len)
+{
+ u32 i, sum = 0;
+
+ for (i = 0; i < len; i++)
+ sum += buf[i];
+ return 0xff - (u8) sum;
+}
+
+static inline void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
+ struct mmc_data *data)
+{
+ u32 sglen, j;
+ u32 dma_address, dma_len;
+ struct scatterlist *sg;
+ struct mt_gpdma_desc *gpd;
+ struct mt_bdma_desc *bd;
+
+ sglen = data->sg_len;
+ sg = data->sg;
+
+ gpd = dma->gpd;
+ bd = dma->bd;
+
+ /* modify gpd */
+ gpd->first_u32 |= GPDMA_DESC_HWO;
+ gpd->first_u32 |= GPDMA_DESC_BDP;
+ /* need to clear first. use these bits to calc checksum */
+ gpd->first_u32 &= ~GPDMA_DESC_CHECKSUM;
+ gpd->first_u32 |= msdc_dma_calcs((u8 *) gpd, 16) << 8;
+
+ /* modify bd */
+ for (j = 0; j < sglen; j++) {
+ dma_address = sg_dma_address(sg);
+ dma_len = sg_dma_len(sg);
+
+ /* init bd */
+ bd[j].first_u32 &= ~BDMA_DESC_BLKPAD;
+ bd[j].first_u32 &= ~BDMA_DESC_DWPAD;
+ bd[j].ptr = (u32)dma_address;
+ bd[j].second_u32 &= ~BDMA_DESC_BUFLEN;
+ bd[j].second_u32 |= (dma_len & BDMA_DESC_BUFLEN);
+
+ if (j == sglen - 1) /* the last bd */
+ bd[j].first_u32 |= BDMA_DESC_EOL;
+ else
+ bd[j].first_u32 &= ~BDMA_DESC_EOL;
+
+ /* checksume need to clear first */
+ bd[j].first_u32 &= ~BDMA_DESC_CHECKSUM;
+ bd[j].first_u32 |= msdc_dma_calcs((u8 *)(&bd[j]), 16) << 8;
+ sg++;
+ }
+
+ sdr_set_field(host->base + MSDC_DMA_CFG, MSDC_DMA_CFG_DECSEN, 1);
+ sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_BRUSTSZ,
+ MSDC_BURST_64B);
+ sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_MODE, 1);
+
+ writel((u32)dma->gpd_addr, host->base + MSDC_DMA_SA);
+
+}
+
+static void msdc_prepare_data(struct msdc_host *host, struct mmc_request *mrq)
+{
+ struct mmc_data *data = mrq->data;
+
+ if (!(data->host_cookie & MSDC_PREPARE_FLAG)) {
+ bool read = (data->flags & MMC_DATA_READ) != 0;
+
+ data->host_cookie |= MSDC_PREPARE_FLAG;
+ dma_map_sg(host->dev, data->sg, data->sg_len,
+ read ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ }
+}
+
+static void msdc_unprepare_data(struct msdc_host *host, struct mmc_request *mrq)
+{
+ struct mmc_data *data = mrq->data;
+
+ if (data->host_cookie & MSDC_ASYNC_FLAG)
+ return;
+
+ if ((data->host_cookie & MSDC_PREPARE_FLAG)) {
+ bool read = (data->flags & MMC_DATA_READ) != 0;
+
+ dma_unmap_sg(host->dev, data->sg, data->sg_len,
+ read ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ data->host_cookie &= ~MSDC_PREPARE_FLAG;
+ }
+}
+
+/* clock control primitives */
+static void msdc_set_timeout(struct msdc_host *host, u32 ns, u32 clks)
+{
+ u32 timeout, clk_ns;
+ u32 mode = 0;
+
+ host->timeout_ns = ns;
+ host->timeout_clks = clks;
+ if (host->sclk == 0) {
+ timeout = 0;
+ } else {
+ clk_ns = 1000000000UL / host->sclk;
+ timeout = (ns + clk_ns - 1) / clk_ns + clks;
+ /* in 1048576 sclk cycle unit */
+ timeout = (timeout + (1 << 20) - 1) >> 20;
+ sdr_get_field(host->base + MSDC_CFG, MSDC_CFG_CKMOD, mode);
+ /*DDR mode will double the clk cycles for data timeout */
+ timeout = mode >= 2 ? timeout * 2 : timeout;
+ timeout = timeout > 1 ? timeout - 1 : 0;
+ timeout = timeout > 255 ? 255 : timeout;
+ }
+ sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, timeout);
+}
+
+static void msdc_set_mclk(struct msdc_host *host, int ddr, u32 hz)
+{
+ u32 mode;
+ u32 flags;
+ u32 div;
+ u32 sclk;
+ u32 hclk = host->hclk;
+
+ if (!hz) {
+ dev_err(host->dev, "set mclk to 0\n");
+ host->mclk = 0;
+ msdc_reset_hw(host);
+ return;
+ }
+
+ flags = readl(host->base + MSDC_INTEN);
+ sdr_clr_bits(host->base + MSDC_INTEN, flags);
+
+ if (ddr) { /* may need to modify later */
+ mode = 0x2; /* ddr mode and use divisor */
+ if (hz >= (hclk >> 2)) {
+ div = 0; /* mean div = 1/4 */
+ sclk = hclk >> 2; /* sclk = clk / 4 */
+ } else {
+ div = (hclk + ((hz << 2) - 1)) / (hz << 2);
+ sclk = (hclk >> 2) / div;
+ div = (div >> 1);
+ }
+ } else if (hz >= hclk) {
+ mode = 0x1; /* no divisor */
+ div = 0;
+ sclk = hclk;
+ } else {
+ mode = 0x0; /* use divisor */
+ if (hz >= (hclk >> 1)) {
+ div = 0; /* mean div = 1/2 */
+ sclk = hclk >> 1; /* sclk = clk / 2 */
+ } else {
+ div = (hclk + ((hz << 2) - 1)) / (hz << 2);
+ sclk = (hclk >> 2) / div;
+ }
+ }
+
+ sdr_set_field(host->base + MSDC_CFG, MSDC_CFG_CKMOD | MSDC_CFG_CKDIV,
+ (mode << 8) | (div % 0xff));
+ while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB))
+ cpu_relax();
+
+ host->sclk = sclk;
+ host->mclk = hz;
+ host->ddr = ddr;
+ /* need because clk changed. */
+ msdc_set_timeout(host, host->timeout_ns, host->timeout_clks);
+ sdr_set_bits(host->base + MSDC_INTEN, flags);
+
+ dev_dbg(host->dev, "sclk: %d, ddr: %d\n", host->sclk, ddr);
+}
+
+#ifdef CONFIG_PM
+static int msdc_gate_clock(struct msdc_host *host)
+{
+ int ret = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+ /* disable SD/MMC/SDIO bus clock */
+ sdr_set_field(host->base + MSDC_CFG, MSDC_CFG_MODE, MSDC_MS);
+ /* turn off SDHC functional clock */
+ clk_disable(host->src_clk);
+ spin_unlock_irqrestore(&host->lock, flags);
+ return ret;
+}
+
+static void msdc_ungate_clock(struct msdc_host *host)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+ clk_enable(host->src_clk);
+ /* enable SD/MMC/SDIO bus clock:
+ * it will be automatically gated when the bus is idle
+ * (set MSDC_CFG_CKPDN bit to have it always on)
+ */
+ sdr_set_field(host->base + MSDC_CFG, MSDC_CFG_MODE, MSDC_SDMMC);
+ while (!(readl(host->base + MSDC_CFG) & MSDC_CFG_CKSTB))
+ cpu_relax();
+ spin_unlock_irqrestore(&host->lock, flags);
+}
+#endif
+
+static void msdc_set_power_mode(struct msdc_host *host, u8 mode)
+{
+ int ret;
+
+ dev_dbg(host->dev, "Set power mode(%d)", mode);
+ if (mode != MMC_POWER_OFF) {
+ regulator_set_voltage(host->core_power, VOL_3300, VOL_3300);
+ ret = regulator_enable(host->core_power);
+ if (ret)
+ dev_err(host->dev, "Failed to set core power!\n");
+
+ if (host->io_power) {
+ regulator_set_voltage(host->io_power, VOL_3300,
+ VOL_3300);
+ ret = regulator_enable(host->io_power);
+ if (ret)
+ dev_err(host->dev, "Failed to set io power!\n");
+ }
+ } else {
+ regulator_disable(host->core_power);
+ if (host->io_power)
+ regulator_disable(host->io_power);
+ }
+
+ msleep(10);
+}
+
+static inline u32 msdc_cmd_find_resp(struct msdc_host *host,
+ struct mmc_request *mrq, struct mmc_command *cmd)
+{
+ u32 resp;
+
+ switch (mmc_resp_type(cmd)) {
+ /* Actually, R1, R5, R6, R7 are the same */
+ case MMC_RSP_R1:
+ resp = RESP_R1;
+ break;
+ case MMC_RSP_R1B:
+ resp = RESP_R1B;
+ break;
+ case MMC_RSP_R2:
+ resp = RESP_R2;
+ break;
+ case MMC_RSP_R3:
+ resp = RESP_R3;
+ break;
+ case MMC_RSP_NONE:
+ default:
+ resp = RESP_NONE;
+ break;
+ }
+
+ return resp;
+}
+
+static inline u32 msdc_cmd_prepare_raw_cmd(struct msdc_host *host,
+ struct mmc_request *mrq, struct mmc_command *cmd)
+{
+ /* rawcmd :
+ * vol_swt << 30 | auto_cmd << 28 | blklen << 16 | go_irq << 15 |
+ * stop << 14 | rw << 13 | dtype << 11 | rsptyp << 7 | brk << 6 | opcode
+ */
+ u32 opcode = cmd->opcode;
+ u32 resp = msdc_cmd_find_resp(host, mrq, cmd);
+ u32 rawcmd = (opcode & 0x3f) | ((resp & 7) << 7);
+
+ host->cmd_rsp = resp;
+
+ if ((opcode == SD_IO_RW_DIRECT && cmd->flags == (unsigned int) -1) ||
+ opcode == MMC_STOP_TRANSMISSION)
+ rawcmd |= (1 << 14);
+ else if (opcode == SD_SWITCH_VOLTAGE)
+ rawcmd |= (1 << 30);
+ else if ((opcode == SD_APP_SEND_SCR) ||
+ (opcode == SD_APP_SEND_NUM_WR_BLKS) ||
+ (opcode == SD_SWITCH &&
+ (mmc_cmd_type(cmd) == MMC_CMD_ADTC)) ||
+ (opcode == SD_APP_SD_STATUS &&
+ (mmc_cmd_type(cmd) == MMC_CMD_ADTC)) ||
+ (opcode == MMC_SEND_EXT_CSD &&
+ (mmc_cmd_type(cmd) == MMC_CMD_ADTC)))
+ rawcmd |= (1 << 11);
+
+ if (cmd->data) {
+ struct mmc_data *data = cmd->data;
+
+ if (mmc_op_multi(opcode)) {
+ if (mmc_card_mmc(host->mmc->card) && mrq->sbc &&
+ !(mrq->sbc->arg & CMD23_ARG_SPECIAL))
+ rawcmd |= (MSDC_AUTOCMD23 & 3) << 28;
+ }
+
+ rawcmd |= ((data->blksz & 0xFFF) << 16);
+ if (data->flags & MMC_DATA_WRITE)
+ rawcmd |= (1 << 13);
+ if (data->blocks > 1)
+ rawcmd |= (2 << 11);
+ else
+ rawcmd |= (1 << 11);
+ /* Always use dma mode */
+ sdr_clr_bits(host->base + MSDC_CFG, MSDC_CFG_PIO);
+
+ if (((host->timeout_ns != data->timeout_ns) ||
+ (host->timeout_clks != data->timeout_clks))) {
+ msdc_set_timeout(host, data->timeout_ns,
+ data->timeout_clks);
+ }
+
+ writel(data->blocks, host->base + SDC_BLK_NUM);
+ }
+ return rawcmd;
+}
+
+static void msdc_start_data(struct msdc_host *host, struct mmc_request *mrq,
+ struct mmc_command *cmd, struct mmc_data *data)
+{
+ bool read;
+ unsigned long flags;
+ u32 wints;
+
+ spin_lock_irqsave(&host->lock, flags);
+ if (!host->data) {
+ host->data = data;
+ } else {
+ dev_err(host->dev, "%s: CMD%d [%d blocks] is active",
+ __func__, host->mrq->cmd->opcode,
+ host->data->blocks);
+ dev_err(host->dev, "but new CMD%d [%d blocks] started\n",
+ cmd->opcode, data->blocks);
+ BUG();
+ }
+ spin_unlock_irqrestore(&host->lock, flags);
+ read = (data->flags & MMC_DATA_READ) != 0;
+ data->error = 0;
+ if (data->stop)
+ data->stop->error = 0;
+
+ mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
+ msdc_dma_setup(host, &host->dma, data);
+ wints = msdc_data_ints_mask(host);
+ sdr_set_bits(host->base + MSDC_INTEN, wints);
+ mb(); /* wait for pending IO to finish */
+ sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_START, 1);
+ dev_dbg(host->dev, "DMA start\n");
+ dev_dbg(host->dev, "%s: cmd=%d DMA data: %d blocks; read=%d\n",
+ __func__, cmd->opcode, data->blocks, read);
+}
+
+static int msdc_auto_cmd_done(struct msdc_host *host, int events,
+ struct mmc_command *cmd)
+{
+ u32 *rsp = cmd->resp;
+
+ rsp[0] = readl(host->base + SDC_ACMD_RESP);
+
+ if (events & MSDC_INT_ACMDRDY) {
+ cmd->error = 0;
+ } else {
+ msdc_reset_hw(host);
+ if (events & MSDC_INT_ACMDCRCERR) {
+ cmd->error = (unsigned int) -EILSEQ;
+ host->error |= REQ_STOP_EIO;
+ } else if (events & MSDC_INT_ACMDTMO) {
+ cmd->error = (unsigned int) -ETIMEDOUT;
+ host->error |= REQ_STOP_TMO;
+ }
+ dev_err(host->dev,
+ "%s: AUTO_CMD%d arg=%08X; rsp %08X; cmd_error=%d\n",
+ __func__, cmd->opcode, cmd->arg, rsp[0],
+ (int)cmd->error);
+ }
+ return (int)(cmd->error);
+}
+
+static void msdc_track_cmd_data(struct msdc_host *host,
+ struct mmc_command *cmd, struct mmc_data *data)
+{
+ if (host->error)
+ dev_dbg(host->dev, "%s: cmd=%d arg=%08X; host->error=0x%08X\n",
+ __func__, cmd->opcode, cmd->arg, host->error);
+}
+
+static void msdc_request_done(struct msdc_host *host, struct mmc_request *mrq)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+ cancel_delayed_work(&host->req_timeout);
+ host->mrq = NULL;
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ msdc_track_cmd_data(host, mrq->cmd, mrq->data);
+ if (mrq->data)
+ msdc_unprepare_data(host, mrq);
+ mmc_request_done(host->mmc, mrq);
+}
+
+/* returns true if command is fully handled; returns false otherwise */
+static bool msdc_cmd_done(struct msdc_host *host, int events,
+ struct mmc_request *mrq, struct mmc_command *cmd)
+{
+ bool done = false;
+ bool sbc_error;
+ unsigned long flags;
+ u32 *rsp = cmd->resp;
+
+ if (mrq->sbc && cmd == mrq->cmd &&
+ (events & (MSDC_INT_ACMDRDY | MSDC_INT_ACMDCRCERR
+ | MSDC_INT_ACMDTMO)))
+ msdc_auto_cmd_done(host, events, mrq->sbc);
+
+ sbc_error = mrq->sbc && mrq->sbc->error;
+
+ if (!sbc_error && !(events & (MSDC_INT_CMDRDY
+ | MSDC_INT_RSPCRCERR
+ | MSDC_INT_CMDTMO)))
+ return done;
+
+ spin_lock_irqsave(&host->lock, flags);
+ done = !host->cmd;
+ host->cmd = NULL;
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ if (done)
+ return true;
+
+ sdr_clr_bits(host->base + MSDC_INTEN, MSDC_CMD_INTS);
+
+ switch (host->cmd_rsp) {
+ case RESP_NONE:
+ break;
+ case RESP_R2:
+ rsp[0] = readl(host->base + SDC_RESP3);
+ rsp[1] = readl(host->base + SDC_RESP2);
+ rsp[2] = readl(host->base + SDC_RESP1);
+ rsp[3] = readl(host->base + SDC_RESP0);
+ break;
+ default: /* Response types 1, 3, 4, 5, 6, 7(1b) */
+ rsp[0] = readl(host->base + SDC_RESP0);
+ break;
+ }
+ if (!sbc_error && !(events & MSDC_INT_CMDRDY)) {
+ msdc_reset_hw(host);
+ if (events & MSDC_INT_RSPCRCERR) {
+ cmd->error = (unsigned int) -EILSEQ;
+ host->error |= REQ_CMD_EIO;
+ } else if (events & MSDC_INT_CMDTMO) {
+ cmd->error = (unsigned int) -ETIMEDOUT;
+ host->error |= REQ_CMD_TMO;
+ }
+ }
+ if (cmd->error)
+ dev_dbg(host->dev,
+ "%s: cmd=%d arg=%08X; rsp %08X; cmd_error=%d\n",
+ __func__, cmd->opcode, cmd->arg, rsp[0],
+ (int)cmd->error);
+
+ msdc_cmd_next(host, mrq, cmd);
+ done = true;
+ return done;
+}
+
+static inline bool msdc_cmd_is_ready(struct msdc_host *host,
+ struct mmc_request *mrq, struct mmc_command *cmd)
+{
+ unsigned long tmo = jiffies + msecs_to_jiffies(20);
+
+ while (sdc_is_cmd_busy(host) && time_before(jiffies, tmo))
+ continue;
+
+ if (sdc_is_cmd_busy(host)) {
+ dev_err(host->dev, "CMD bus busy detected\n");
+ host->error |= REQ_CMD_BUSY;
+ msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
+ return false;
+ }
+
+ if (mmc_resp_type(cmd) == MMC_RSP_R1B || cmd->data) {
+ /* R1B or with data, should check SDCBUSY */
+ while (sdc_is_busy(host))
+ cpu_relax();
+ }
+ return true;
+}
+
+static void msdc_start_command(struct msdc_host *host,
+ struct mmc_request *mrq, struct mmc_command *cmd)
+{
+ u32 rawcmd;
+ unsigned long flags;
+
+ spin_lock_irqsave(&host->lock, flags);
+ if (host->cmd) {
+ dev_err(host->dev, "%s: CMD%d is active, but new CMD%d is sent\n",
+ __func__, host->cmd->opcode, cmd->opcode);
+ BUG();
+ } else {
+ host->cmd = cmd;
+ }
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ if (!msdc_cmd_is_ready(host, mrq, cmd))
+ return;
+
+ if (msdc_txfifocnt(host) || msdc_rxfifocnt(host)) {
+ dev_err(host->dev, "TX/RX FIFO non-empty before start of IO. Reset\n");
+ msdc_reset_hw(host);
+ }
+
+ cmd->error = 0;
+ rawcmd = msdc_cmd_prepare_raw_cmd(host, mrq, cmd);
+ mod_delayed_work(system_wq, &host->req_timeout, DAT_TIMEOUT);
+
+ sdr_set_bits(host->base + MSDC_INTEN, MSDC_CMD_INTS);
+ writel(cmd->arg, host->base + SDC_ARG);
+ writel(rawcmd, host->base + SDC_CMD);
+}
+
+static void msdc_cmd_next(struct msdc_host *host,
+ struct mmc_request *mrq, struct mmc_command *cmd)
+{
+ if (cmd->error || (mrq->sbc && mrq->sbc->error))
+ msdc_request_done(host, mrq);
+ else if (cmd == mrq->sbc)
+ msdc_start_command(host, mrq, mrq->cmd);
+ else if (!cmd->data)
+ msdc_request_done(host, mrq);
+ else
+ msdc_start_data(host, mrq, cmd, cmd->data);
+}
+
+static void msdc_ops_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+ unsigned long flags;
+ struct msdc_host *host = mmc_priv(mmc);
+
+ host->error = 0;
+
+ spin_lock_irqsave(&host->lock, flags);
+ if (!host->mrq) {
+ host->mrq = mrq;
+ } else {
+ dev_err(host->dev,
+ "%s: req [CMD%d] is active, new req [CMD%d] is sent\n",
+ __func__, host->mrq->cmd->opcode, mrq->cmd->opcode);
+ BUG();
+ }
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ if (mrq->data)
+ msdc_prepare_data(host, mrq);
+
+ /* if SBC is required, we have HW option and SW option.
+ * if HW option is enabled, and SBC does not have "special" flags,
+ * use HW option, otherwise use SW option
+ */
+ if (mrq->sbc && (!mmc_card_mmc(mmc->card) ||
+ (mrq->sbc->arg & CMD23_ARG_SPECIAL)))
+ msdc_start_command(host, mrq, mrq->sbc);
+ else
+ msdc_start_command(host, mrq, mrq->cmd);
+}
+
+static void msdc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
+ bool is_first_req)
+{
+ struct msdc_host *host = mmc_priv(mmc);
+ struct mmc_command *cmd = mrq->cmd;
+ struct mmc_data *data = mrq->data;
+
+ if (!data)
+ return;
+
+ data->host_cookie = 0;
+ if (cmd->opcode == MMC_READ_SINGLE_BLOCK ||
+ cmd->opcode == MMC_READ_MULTIPLE_BLOCK ||
+ cmd->opcode == MMC_WRITE_BLOCK ||
+ cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK) {
+ msdc_prepare_data(host, mrq);
+ data->host_cookie |= MSDC_ASYNC_FLAG;
+ }
+}
+
+static void msdc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
+ int err)
+{
+ struct msdc_host *host = mmc_priv(mmc);
+ struct mmc_data *data;
+
+ data = mrq->data;
+ if (!data)
+ return;
+ if (data->host_cookie) {
+ data->host_cookie &= ~MSDC_ASYNC_FLAG;
+ msdc_unprepare_data(host, mrq);
+ }
+}
+
+static void msdc_data_xfer_next(struct msdc_host *host,
+ struct mmc_request *mrq, struct mmc_data *data)
+{
+ if (mmc_op_multi(mrq->cmd->opcode) && mrq->stop && !mrq->stop->error &&
+ (!data->bytes_xfered || !mrq->sbc))
+ msdc_start_command(host, mrq, mrq->stop);
+ else
+ msdc_request_done(host, mrq);
+}
+
+static bool msdc_data_xfer_done(struct msdc_host *host, u32 events,
+ struct mmc_request *mrq, struct mmc_data *data)
+{
+ struct mmc_command *stop = data->stop;
+ unsigned long flags;
+ bool done;
+ u32 wints;
+
+ bool check_data = (events &
+ (MSDC_INT_XFER_COMPL | MSDC_INT_DATCRCERR | MSDC_INT_DATTMO
+ | MSDC_INT_DMA_BDCSERR | MSDC_INT_DMA_GPDCSERR
+ | MSDC_INT_DMA_PROTECT));
+
+ spin_lock_irqsave(&host->lock, flags);
+ done = !host->data;
+ if (check_data)
+ host->data = NULL;
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ if (done)
+ return true;
+
+ if (check_data || (stop && stop->error)) {
+ dev_dbg(host->dev, "DMA status: 0x%8X\n",
+ readl(host->base + MSDC_DMA_CFG));
+ sdr_set_field(host->base + MSDC_DMA_CTRL, MSDC_DMA_CTRL_STOP,
+ 1);
+ while (readl(host->base + MSDC_DMA_CFG) & MSDC_DMA_CFG_STS)
+ ;
+ mb(); /* wait for pending IO to finish */
+ wints = msdc_data_ints_mask(host);
+ sdr_clr_bits(host->base + MSDC_INTEN, wints);
+ dev_dbg(host->dev, "DMA stop\n");
+
+ if ((events & MSDC_INT_XFER_COMPL) && (!stop || !stop->error)) {
+ data->bytes_xfered = data->blocks * data->blksz;
+ } else {
+ dev_err(host->dev, "interrupt events: %x\n", events);
+ msdc_reset_hw(host);
+ host->error |= REQ_DAT_ERR;
+ data->bytes_xfered = 0;
+
+ if (events & MSDC_INT_DATTMO)
+ data->error = (unsigned int) -ETIMEDOUT;
+
+ dev_err(host->dev, "%s: cmd=%d; blocks=%d",
+ __func__, mrq->cmd->opcode, data->blocks);
+ dev_err(host->dev, "data_error=%d xfer_size=%d\n",
+ (int)data->error, data->bytes_xfered);
+ }
+
+ msdc_data_xfer_next(host, mrq, data);
+ done = true;
+ }
+ return done;
+}
+
+static void msdc_set_buswidth(struct msdc_host *host, u32 width)
+{
+ u32 val = readl(host->base + SDC_CFG);
+
+ val &= ~SDC_CFG_BUSWIDTH;
+
+ switch (width) {
+ default:
+ case MMC_BUS_WIDTH_1:
+ val |= (MSDC_BUS_1BITS << 16);
+ break;
+ case MMC_BUS_WIDTH_4:
+ val |= (MSDC_BUS_4BITS << 16);
+ break;
+ case MMC_BUS_WIDTH_8:
+ val |= (MSDC_BUS_8BITS << 16);
+ break;
+ }
+
+ writel(val, host->base + SDC_CFG);
+ dev_dbg(host->dev, "Bus Width = %d", width);
+}
+
+int msdc_ops_switch_volt(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct msdc_host *host = mmc_priv(mmc);
+ int err = 0;
+ u32 status;
+ u32 sclk = host->sclk;
+
+ if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_330)
+ return 0;
+
+ /* make sure SDC is not busy (TBC) */
+ err = -EPERM;
+
+ while (sdc_is_busy(host))
+ cpu_relax();
+
+ /* check if CMD/DATA lines both 0 */
+ if ((readl(host->base + MSDC_PS)
+ & ((1 << 24) | (0xf << 16))) != 0)
+ return err;
+
+ if (ios->signal_voltage == MMC_SIGNAL_VOLTAGE_180) {
+ if (host->io_power) {
+ regulator_set_voltage(host->io_power, VOL_1800,
+ VOL_1800);
+ /* wait at least 5ms for 1.8v signal switching */
+ msleep(5);
+ } else {
+ dev_dbg(host->dev,
+ "Do not support power switch!\n");
+ return err;
+ }
+ }
+
+ /* config clock to 10~12MHz mode for volt switch detection by host. */
+ msdc_set_mclk(host, 0, 12000000);
+
+ msleep(5);
+
+ /* start to detect volt change by providing 1.8v signal to card */
+ sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_BV18SDT);
+
+ /* wait at max. 1ms */
+ mdelay(1);
+
+ while ((status = readl(host->base + MSDC_CFG))
+ & MSDC_CFG_BV18SDT)
+ cpu_relax();
+
+ if (status & MSDC_CFG_BV18PSS)
+ err = 0;
+ /* config clock back to init clk freq. */
+ msdc_set_mclk(host, 0, sclk);
+
+ return err;
+}
+
+static void msdc_request_timeout(struct work_struct *work)
+{
+ struct msdc_host *host = container_of(work, struct msdc_host,
+ req_timeout.work);
+ unsigned long flags;
+ struct mmc_request *mrq;
+ struct mmc_command *cmd;
+ struct mmc_data *data;
+
+ spin_lock_irqsave(&host->lock, flags);
+ mrq = ACCESS_ONCE(host->mrq);
+ cmd = ACCESS_ONCE(host->cmd);
+ data = ACCESS_ONCE(host->data);
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ /* simulate HW timeout status */
+ dev_err(host->dev, "%s: aborting cmd/data/mrq\n", __func__);
+ if (mrq) {
+ dev_err(host->dev, "%s: aborting mrq=%p cmd=%d\n", __func__,
+ mrq, mrq->cmd->opcode);
+ if (cmd) {
+ dev_err(host->dev, "%s: aborting cmd=%d\n",
+ __func__, cmd->opcode);
+ msdc_cmd_done(host, MSDC_INT_CMDTMO, mrq, cmd);
+ } else if (data) {
+ dev_err(host->dev, "%s: abort data: cmd%d; %d blocks\n",
+ __func__, mrq->cmd->opcode, data->blocks);
+ msdc_data_xfer_done(host, MSDC_INT_DATTMO, mrq, data);
+ }
+ }
+}
+
+static int msdc_ops_enable(struct mmc_host *mmc)
+{
+ struct msdc_host *host = mmc_priv(mmc);
+
+ pm_runtime_get_sync(host->dev);
+
+ return 0;
+}
+
+static int msdc_ops_disable(struct mmc_host *mmc)
+{
+ struct msdc_host *host = mmc_priv(mmc);
+
+ pm_runtime_mark_last_busy(host->dev);
+ pm_runtime_put_autosuspend(host->dev);
+
+ return 0;
+}
+
+static irqreturn_t msdc_irq(int irq, void *dev_id)
+{
+ struct msdc_host *host = (struct msdc_host *) dev_id;
+
+ while (true) {
+ unsigned long flags;
+ struct mmc_request *mrq;
+ struct mmc_command *cmd;
+ struct mmc_data *data;
+ u32 events, event_mask;
+
+ spin_lock_irqsave(&host->lock, flags);
+ events = readl(host->base + MSDC_INT);
+ event_mask = readl(host->base + MSDC_INTEN);
+ /* clear interrupts */
+ writel(events, host->base + MSDC_INT);
+
+ mrq = ACCESS_ONCE(host->mrq);
+ cmd = ACCESS_ONCE(host->cmd);
+ data = ACCESS_ONCE(host->data);
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ if (!(events & event_mask))
+ break;
+
+ if (!mrq) {
+ dev_err(host->dev,
+ "%s: MRQ=NULL; events=%08X; event_mask=%08X\n",
+ __func__, events, event_mask);
+ WARN_ON(1);
+ break;
+ }
+
+ dev_dbg(host->dev, "%s: events=%08X\n", __func__, events);
+
+ if (cmd)
+ msdc_cmd_done(host, events, mrq, cmd);
+ else if (data)
+ msdc_data_xfer_done(host, events, mrq, data);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static void msdc_init_hw(struct msdc_host *host)
+{
+ u32 val;
+ /* Configure to MMC/SD mode */
+ sdr_set_field(host->base + MSDC_CFG, MSDC_CFG_MODE, MSDC_SDMMC);
+
+ /* Reset */
+ msdc_reset_hw(host);
+
+ /* Disable card detection */
+ sdr_clr_bits(host->base + MSDC_PS, MSDC_PS_CDEN);
+
+ /* Disable and clear all interrupts */
+ writel(0, host->base + MSDC_INTEN);
+ val = readl(host->base + MSDC_INT);
+ writel(val, host->base + MSDC_INT);
+
+ writel(0, host->base + MSDC_PAD_TUNE);
+ writel(0, host->base + MSDC_IOCON);
+ sdr_set_field(host->base + MSDC_IOCON, MSDC_IOCON_DDLSEL, 1);
+ writel(0x403c004f, host->base + MSDC_PATCH_BIT);
+ sdr_set_field(host->base + MSDC_PATCH_BIT, MSDC_CKGEN_MSDC_DLY_SEL, 1);
+ writel(0xffff0089, host->base + MSDC_PATCH_BIT1);
+ /* Configure to enable SDIO mode.
+ it's must otherwise sdio cmd5 failed */
+ sdr_set_bits(host->base + SDC_CFG, SDC_CFG_SDIO);
+
+ /* disable detect SDIO device interupt function */
+ sdr_clr_bits(host->base + SDC_CFG, SDC_CFG_SDIOIDE);
+
+ /* Configure to default data timeout */
+ sdr_set_field(host->base + SDC_CFG, SDC_CFG_DTOC, DEFAULT_DTOC);
+ msdc_set_buswidth(host, MMC_BUS_WIDTH_1);
+
+ dev_dbg(host->dev, "init hardware done!");
+}
+
+static void msdc_deinit_hw(struct msdc_host *host)
+{
+ u32 val;
+
+ /* Disable and clear all interrupts */
+ writel(0, host->base + MSDC_INTEN);
+
+ val = readl(host->base + MSDC_INT);
+ writel(val, host->base + MSDC_INT);
+
+ clk_disable(host->src_clk);
+ clk_unprepare(host->src_clk);
+ msdc_set_power_mode(host, MMC_POWER_OFF); /* make sure power down */
+}
+
+/* init gpd and bd list in msdc_drv_probe */
+static void msdc_init_gpd_bd(struct msdc_host *host, struct msdc_dma *dma)
+{
+ struct mt_gpdma_desc *gpd = dma->gpd;
+ struct mt_bdma_desc *bd = dma->bd;
+ int i;
+
+ memset(gpd, 0, sizeof(struct mt_gpdma_desc) * MAX_GPD_NUM);
+ gpd->next = (u32)dma->gpd_addr + sizeof(struct mt_gpdma_desc);
+
+ gpd->first_u32 |= GPDMA_DESC_BDP; /* hwo, cs, bd pointer */
+ gpd->ptr = (u32)dma->bd_addr; /* physical address */
+
+ memset(bd, 0, sizeof(struct mt_bdma_desc) * MAX_BD_PER_GPD);
+
+ for (i = 0; i < (MAX_BD_PER_GPD - 1); i++)
+ bd[i].next = (u32)dma->bd_addr + sizeof(*bd) * (i + 1);
+}
+
+static int timing_is_uhs(unsigned char timing)
+{
+ if (timing != MMC_TIMING_LEGACY &&
+ timing != MMC_TIMING_MMC_HS &&
+ timing != MMC_TIMING_SD_HS)
+ return 1;
+ return 0;
+}
+
+static void msdc_ops_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct msdc_host *host = mmc_priv(mmc);
+ u32 ddr = 0;
+
+ if (ios->timing == MMC_TIMING_UHS_DDR50)
+ ddr = 1;
+
+ msdc_set_buswidth(host, ios->bus_width);
+
+ /* Suspend/Resume will do power off/on */
+ switch (ios->power_mode) {
+ case MMC_POWER_OFF:
+ case MMC_POWER_UP:
+ msdc_init_hw(host);
+ msdc_set_power_mode(host, ios->power_mode);
+ break;
+ default:
+ break;
+ }
+
+ /* Apply different pinctrl settings for different timing */
+ if (timing_is_uhs(ios->timing))
+ pinctrl_select_state(host->pinctrl, host->pins_uhs);
+ else
+ pinctrl_select_state(host->pinctrl, host->pins_default);
+
+ if (host->mclk != ios->clock || host->ddr != ddr)
+ msdc_set_mclk(host, ddr, ios->clock);
+}
+
+static struct mmc_host_ops mt_msdc_ops = {
+ .enable = msdc_ops_enable,
+ .disable = msdc_ops_disable,
+ .post_req = msdc_post_req,
+ .pre_req = msdc_pre_req,
+ .request = msdc_ops_request,
+ .set_ios = msdc_ops_set_ios,
+ .start_signal_voltage_switch = msdc_ops_switch_volt,
+};
+
+static int msdc_of_parse(struct platform_device *pdev, struct mmc_host *mmc)
+{
+ struct msdc_host *host = mmc_priv(mmc);
+ struct resource *res;
+ void __iomem *base;
+ struct regulator *core_power;
+ struct regulator *io_power;
+ struct clk *src_clk;
+ int irq;
+ int ret;
+
+ ret = mmc_of_parse(mmc);
+ if (ret)
+ return ret;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ core_power = devm_regulator_get(&pdev->dev, "core-power");
+ if (IS_ERR(core_power)) {
+ dev_dbg(&pdev->dev,
+ "Cannot get core power from the device tree!\n");
+ return PTR_ERR(core_power);
+ }
+
+ io_power = devm_regulator_get_optional(&pdev->dev, "io-power");
+ if (IS_ERR(io_power)) {
+ io_power = NULL;
+ dev_dbg(&pdev->dev,
+ "Cannot get io power from the device tree!\n");
+ }
+
+ src_clk = devm_clk_get(&pdev->dev, "source");
+ if (IS_ERR(src_clk)) {
+ dev_err(&pdev->dev,
+ "Invalid source clock from the device tree!\n");
+ return PTR_ERR(src_clk);
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return -EINVAL;
+
+ host->pinctrl = devm_pinctrl_get(&pdev->dev);
+ if (IS_ERR(host->pinctrl)) {
+ ret = PTR_ERR(host->pinctrl);
+ dev_err(&pdev->dev, "Cannot find pinctrl!\n");
+ goto err;
+ }
+
+ host->pins_default = pinctrl_lookup_state(host->pinctrl, "default");
+ if (IS_ERR(host->pins_default)) {
+ ret = PTR_ERR(host->pins_default);
+ dev_err(&pdev->dev, "Cannot find pinctrl default!\n");
+ goto err;
+ }
+
+ host->pins_uhs = pinctrl_lookup_state(host->pinctrl, "state_uhs");
+ if (IS_ERR(host->pins_uhs)) {
+ ret = PTR_ERR(host->pins_uhs);
+ dev_err(&pdev->dev, "Cannot find pinctrl uhs!\n");
+ goto err;
+ }
+
+ host->irq = irq;
+ host->base = base;
+ host->src_clk = src_clk;
+ host->core_power = core_power;
+ host->io_power = io_power;
+
+ return 0;
+err:
+ return ret;
+}
+
+static int msdc_drv_probe(struct platform_device *pdev)
+{
+ struct mmc_host *mmc;
+ struct msdc_host *host;
+ int ret;
+
+ if (!pdev->dev.of_node) {
+ dev_err(&pdev->dev, "No DT found\n");
+ return -EINVAL;
+ }
+ /* Allocate MMC host for this device */
+ mmc = mmc_alloc_host(sizeof(struct msdc_host), &pdev->dev);
+ if (!mmc)
+ return -ENOMEM;
+
+ ret = msdc_of_parse(pdev, mmc);
+ if (ret)
+ goto host_free;
+
+ host = mmc_priv(mmc);
+ host->dev = &pdev->dev;
+ host->mmc = mmc;
+ /* Set host parameters to mmc */
+ mmc->ops = &mt_msdc_ops;
+ mmc->f_min = HOST_MIN_MCLK;
+ mmc->ocr_avail = MSDC_OCR_AVAIL;
+
+ mmc->caps |= MMC_CAP_ERASE | MMC_CAP_CMD23;
+ /* MMC core transfer sizes tunable parameters */
+ mmc->max_segs = MAX_HW_SGMTS;
+ mmc->max_seg_size = MAX_SGMT_SZ;
+ mmc->max_blk_size = HOST_MAX_BLKSZ;
+ mmc->max_req_size = MAX_REQ_SZ;
+ mmc->max_blk_count = mmc->max_req_size;
+
+ host->hclk = clk_get_rate(host->src_clk);
+ host->timeout_clks = DEFAULT_DTOC * 1048576;
+ host->dma.gpd = dma_alloc_coherent(&pdev->dev,
+ MAX_GPD_NUM * sizeof(struct mt_gpdma_desc),
+ &host->dma.gpd_addr, GFP_KERNEL);
+ host->dma.bd = dma_alloc_coherent(&pdev->dev,
+ MAX_BD_NUM * sizeof(struct mt_bdma_desc),
+ &host->dma.bd_addr, GFP_KERNEL);
+ if ((!host->dma.gpd) || (!host->dma.bd)) {
+ ret = -ENOMEM;
+ goto release_mem;
+ }
+ msdc_init_gpd_bd(host, &host->dma);
+ INIT_DELAYED_WORK(&host->req_timeout, msdc_request_timeout);
+ spin_lock_init(&host->lock);
+
+ platform_set_drvdata(pdev, mmc);
+ clk_prepare(host->src_clk);
+
+ pm_runtime_enable(host->dev);
+ pm_runtime_get_sync(host->dev);
+ pm_runtime_set_autosuspend_delay(host->dev, MTK_MMC_AUTOSUSPEND_DELAY);
+ pm_runtime_use_autosuspend(host->dev);
+
+ ret = devm_request_irq(&pdev->dev, (unsigned int) host->irq, msdc_irq,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT, pdev->name, host);
+ if (ret)
+ goto release;
+
+ ret = mmc_add_host(mmc);
+ if (ret)
+ goto end;
+
+ pm_runtime_mark_last_busy(host->dev);
+ pm_runtime_put_autosuspend(host->dev);
+ return 0;
+
+end:
+ pm_runtime_put_sync(host->dev);
+ pm_runtime_disable(host->dev);
+release:
+ platform_set_drvdata(pdev, NULL);
+ msdc_deinit_hw(host);
+release_mem:
+ if (host->dma.gpd)
+ dma_free_coherent(&pdev->dev,
+ MAX_GPD_NUM * sizeof(struct mt_gpdma_desc),
+ host->dma.gpd, host->dma.gpd_addr);
+ if (host->dma.bd)
+ dma_free_coherent(&pdev->dev,
+ MAX_BD_NUM * sizeof(struct mt_bdma_desc),
+ host->dma.bd, host->dma.bd_addr);
+
+host_free:
+ mmc_free_host(mmc);
+
+ return ret;
+}
+
+static int msdc_drv_remove(struct platform_device *pdev)
+{
+ struct mmc_host *mmc;
+ struct msdc_host *host;
+
+ mmc = platform_get_drvdata(pdev);
+ host = mmc_priv(mmc);
+
+ pm_runtime_get_sync(host->dev);
+
+ platform_set_drvdata(pdev, NULL);
+ mmc_remove_host(host->mmc);
+ msdc_deinit_hw(host);
+
+ pm_runtime_put_sync(host->dev);
+ pm_runtime_disable(host->dev);
+ dma_free_coherent(&pdev->dev,
+ MAX_GPD_NUM * sizeof(struct mt_gpdma_desc),
+ host->dma.gpd, host->dma.gpd_addr);
+ dma_free_coherent(&pdev->dev, MAX_BD_NUM * sizeof(struct mt_bdma_desc),
+ host->dma.bd, host->dma.bd_addr);
+
+ mmc_free_host(host->mmc);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int msdc_runtime_suspend(struct device *dev)
+{
+ int ret = 0;
+ struct mmc_host *mmc = dev_get_drvdata(dev);
+ struct msdc_host *host = mmc_priv(mmc);
+
+ ret = msdc_gate_clock(host);
+ return ret;
+}
+
+static int msdc_runtime_resume(struct device *dev)
+{
+ struct mmc_host *mmc = dev_get_drvdata(dev);
+ struct msdc_host *host = mmc_priv(mmc);
+
+ msdc_ungate_clock(host);
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops msdc_dev_pm_ops = {
+ SET_RUNTIME_PM_OPS(msdc_runtime_suspend, msdc_runtime_resume, NULL)
+};
+
+static const struct of_device_id msdc_of_ids[] = {
+ { .compatible = "mediatek,mt8135-mmc", },
+ {}
+};
+
+static struct platform_driver mt_msdc_driver = {
+ .probe = msdc_drv_probe,
+ .remove = msdc_drv_remove,
+ .driver = {
+ .name = "mtk-msdc",
+ .of_match_table = msdc_of_ids,
+ .pm = &msdc_dev_pm_ops,
+ },
+};
+
+module_platform_driver(mt_msdc_driver);
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("MediaTek SD/MMC Card Driver");
--
1.8.1.1.dirty
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