[PATCH v2 1/2] mmc: Add SD/SDIO driver for Sunplus SP7021

LH.Kuo
2021-11-09T07:58:34Z

Add SD/SDIO driver for Sunplus SP7021.

Signed-off-by: LH.Kuo <lh.kuo@sunplus.com>
---
Changes in v2:
- Addressed all comments from Mr. Philipp Zabel
- Modified the structure and register access method.
- Modifiedthe path about MAINTAINERS. ( wrong messages PATH in v1).

MAINTAINERS | 6 +
drivers/mmc/host/Kconfig | 10 +
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/sunplus_sd2.c | 1068 ++++++++++++++++++++++++++++++++++++++++
drivers/mmc/host/sunplus_sd2.h | 155 ++++++
5 files changed, 1240 insertions(+)
create mode 100644 drivers/mmc/host/sunplus_sd2.c
create mode 100644 drivers/mmc/host/sunplus_sd2.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 170bbbe..2746084 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18189,6 +18189,12 @@ L: netdev@vger.kernel.org
S: Maintained
F: drivers/net/ethernet/dlink/sundance.c

+SUNPLUS SD/SDIO HOST CONTROLLER INTERFACE DRIVER
+M: LH Kuo <lh.kuo@sunplus.com>
+L: linux-mmc@vger.kernel.org
+S: Maintained
+F: drivers/mmc/host/sunplus_sd2.*
+
SUPERH
M: Yoshinori Sato <ysato@users.sourceforge.jp>
M: Rich Felker <dalias@libc.org>
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 5af8494..2aba9eb 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -1091,5 +1091,15 @@ config MMC_OWL
This selects support for the SD/MMC Host Controller on
Actions Semi Owl SoCs.

+config MMC_SP_SDV2
+ tristate "Sunplus SP7021 SD/SDIO Controller"
+ depends on SOC_SP7021
+ help
+ If you say yes here, you will get support for SD/SDIO host interface
+ on sunplus Socs.
+ If you have a controller with this interface, say Y or M here.
+ If unsure, say N.
+ Sunplus SD/SDIO Host Controller support"
+
config MMC_SDHCI_EXTERNAL_DMA
bool
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index ea36d37..167aa5c 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -101,6 +101,7 @@ obj-$(CONFIG_MMC_CQHCI) += cqhci.o
cqhci-y += cqhci-core.o
cqhci-$(CONFIG_MMC_CRYPTO) += cqhci-crypto.o
obj-$(CONFIG_MMC_HSQ) += mmc_hsq.o
+obj-$(CONFIG_MMC_SP_SDV2) += sunplus_sd2.o

ifeq ($(CONFIG_CB710_DEBUG),y)
CFLAGS-cb710-mmc += -DDEBUG
diff --git a/drivers/mmc/host/sunplus_sd2.c b/drivers/mmc/host/sunplus_sd2.c
new file mode 100644
index 0000000..756c3d4
--- /dev/null
+++ b/drivers/mmc/host/sunplus_sd2.c
@@ -0,0 +1,1068 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/**
+ * (C) Copyright 2019 Sunplus Technology. <http://www.sunplus.com/>
+ *
+ * Sunplus SD host controller v2.0
+ *
+ */
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <linux/interrupt.h>
+#include <linux/dma-mapping.h>
+#include <linux/of_device.h>
+#include <linux/reset.h>
+#include <linux/mmc/mmc.h>
+#include <linux/mmc/sdio.h>
+#include <linux/mmc/slot-gpio.h>
+#include <linux/clk.h>
+#include <linux/bitops.h>
+#include <linux/uaccess.h>
+#include "sunplus_sd2.h"
+
+enum loglevel {
+ SPSDC_LOG_OFF,
+ SPSDC_LOG_ERROR,
+ SPSDC_LOG_WARNING,
+ SPSDC_LOG_INFO,
+ SPSDC_LOG_DEBUG,
+ SPSDC_LOG_VERBOSE,
+ SPSDC_LOG_MAX
+};
+static int loglevel = SPSDC_LOG_WARNING;
+
+/**
+ * we do not need `SPSDC_LOG_' prefix here, when specify @level.
+ */
+#define spsdc_pr(level, fmt, ...) \
+ do { \
+ if (unlikely(SPSDC_LOG_##level <= loglevel)) \
+ pr_info("SPSDC [" #level "] " fmt, ##__VA_ARGS__); \
+ } while (0)
+
+/* Produces a mask of set bits covering a range of a 32-bit value */
+static inline u32 bitfield_mask(u32 shift, u32 width)
+{
+ return ((1 << width) - 1) << shift;
+}
+
+/* Extract the value of a bitfield found within a given register value */
+static inline u32 bitfield_extract(u32 reg_val, u32 shift, u32 width)
+{
+ return (reg_val & bitfield_mask(shift, width)) >> shift;
+}
+
+/* Replace the value of a bitfield found within a given register value */
+static inline u32 bitfield_replace(u32 reg_val, u32 shift, u32 width, u32 val)
+{
+ u32 mask = bitfield_mask(shift, width);
+
+ return (reg_val & ~mask) | (val << shift);
+}
+/* for register value with mask bits */
+#define __bitfield_replace(value, shift, width, new_value) \
+ (bitfield_replace(value, shift, width, new_value)|bitfield_mask(shift+16, width))
+
+/**
+ * wait for transaction done, return -1 if error.
+ */
+static inline int spsdc_wait_finish(struct spsdc_host *host)
+{
+ /* Wait for transaction finish */
+ unsigned long timeout = jiffies + msecs_to_jiffies(5000);
+
+ while (!time_after(jiffies, timeout)) {
+ if (readl(host->base + SPSD2_SD_STATE_REG) & SPSDC_SDSTATE_FINISH)
+ return 0;
+ if (readl(host->base + SPSD2_SD_STATE_REG) & SPSDC_SDSTATE_ERROR)
+ return -1;
+ }
+ return -1;
+}
+
+static inline int spsdc_wait_sdstatus(struct spsdc_host *host, unsigned int status_bit)
+{
+ unsigned long timeout = jiffies + msecs_to_jiffies(5000);
+
+ while (!time_after(jiffies, timeout)) {
+ if (readl(host->base + SPSD2_SD_STATUS_REG) & status_bit)
+ return 0;
+ if (readl(host->base + SPSD2_SD_STATE_REG) & SPSDC_SDSTATE_ERROR)
+ return -1;
+ }
+ return -1;
+}
+
+#define spsdc_wait_rspbuf_full(host) spsdc_wait_sdstatus(host, SPSDC_SDSTATUS_RSP_BUF_FULL)
+#define spsdc_wait_rxbuf_full(host) spsdc_wait_sdstatus(host, SPSDC_SDSTATUS_RX_DATA_BUF_FULL)
+#define spsdc_wait_txbuf_empty(host) spsdc_wait_sdstatus(host, SPSDC_SDSTATUS_TX_DATA_BUF_EMPTY)
+
+static void spsdc_get_rsp(struct spsdc_host *host, struct mmc_command *cmd)
+{
+ u32 value0_3, value4_5;
+
+ if (unlikely(!(cmd->flags & MMC_RSP_PRESENT)))
+ return;
+ if (unlikely(cmd->flags & MMC_RSP_136)) {
+ if (spsdc_wait_rspbuf_full(host))
+ return;
+ value0_3 = readl(host->base + SPSD2_SD_RSP_BUF0_3_REG);
+ value4_5 = readl(host->base + SPSD2_SD_RSP_BUF4_5_REG) & 0xffff;
+ cmd->resp[0] = (value0_3 << 8) | (value4_5 >> 8);
+ cmd->resp[1] = value4_5 << 24;
+ if (spsdc_wait_rspbuf_full(host))
+ return;
+ value0_3 = readl(host->base + SPSD2_SD_RSP_BUF0_3_REG);
+ value4_5 = readl(host->base + SPSD2_SD_RSP_BUF4_5_REG) & 0xffff;
+ cmd->resp[1] |= value0_3 >> 8;
+ cmd->resp[2] = value0_3 << 24;
+ cmd->resp[2] |= value4_5 << 8;
+ if (spsdc_wait_rspbuf_full(host))
+ return;
+ value0_3 = readl(host->base + SPSD2_SD_RSP_BUF0_3_REG);
+ value4_5 = readl(host->base + SPSD2_SD_RSP_BUF4_5_REG) & 0xffff;
+ cmd->resp[2] |= value0_3 >> 24;
+ cmd->resp[3] = value0_3 << 8;
+ cmd->resp[3] |= value4_5 >> 8;
+ } else {
+ if (spsdc_wait_rspbuf_full(host))
+ return;
+ value0_3 = readl(host->base + SPSD2_SD_RSP_BUF0_3_REG);
+ value4_5 = readl(host->base + SPSD2_SD_RSP_BUF4_5_REG) & 0xffff;
+ cmd->resp[0] = (value0_3 << 8) | (value4_5 >> 8);
+ cmd->resp[1] = value4_5 << 24;
+ }
+}
+
+static void spsdc_set_bus_clk(struct spsdc_host *host, int clk)
+{
+ unsigned int clkdiv;
+ int f_min = host->mmc->f_min;
+ int f_max = host->mmc->f_max;
+ u32 value = readl(host->base + SPSD2_SD_CONF_REG);
+
+ if (clk < f_min)
+ clk = f_min;
+ if (clk > f_max)
+ clk = f_max;
+
+ // SD 2.0 only max set to 50Mhz CLK
+ if (clk >= SPSDC_50M_CLK)
+ clk = f_max;
+
+ spsdc_pr(INFO, "set bus clock to %d\n", clk);
+ clkdiv = (clk_get_rate(host->clk)+clk)/clk-1;
+ if (clkdiv > 0xfff) {
+ spsdc_pr(WARNING, "clock %d is too low to be set!\n", clk);
+ clkdiv = 0xfff;
+ }
+ value = bitfield_replace(value, 0, 12, clkdiv);
+ writel(value, host->base + SPSD2_SD_CONF_REG);
+
+ /* In order to reduce the frequency of context switch,
+ * if it is high speed or upper, we do not use interrupt
+ * when send a command that without data.
+ */
+ if (clk > 25000000)
+ host->use_int = 0;
+ else
+ host->use_int = 1;
+}
+
+static void spsdc_set_bus_timing(struct spsdc_host *host, unsigned int timing)
+{
+ u32 value = readl(host->base + SPSD2_SD_TIMING_CONF0_REG);
+ int clkdiv = readl(host->base + SPSD2_SD_CONF_REG) & 0xfff;
+ int delay = (clkdiv/2 < 7) ? clkdiv/2 : 7;
+ char *timing_name;
+
+ switch (timing) {
+ case MMC_TIMING_LEGACY:
+ value = bitfield_replace(value, 11, 1, 0); /* sd_high_speed_en */
+ timing_name = "legacy";
+ break;
+ case MMC_TIMING_SD_HS:
+ case MMC_TIMING_MMC_HS:
+ value = bitfield_replace(value, 11, 1, 1);
+ value = bitfield_replace(value, 12, 3, delay); /* sd_wr_dly_sel */
+ timing_name = "hs";
+ break;
+ }
+ spsdc_pr(INFO, "set bus timing to %s\n", timing_name);
+ writel(value, host->base + SPSD2_SD_TIMING_CONF0_REG);
+}
+
+static void spsdc_set_bus_width(struct spsdc_host *host, int width)
+{
+ u32 value = readl(host->base + SPSD2_SD_CONF_REG);
+ int bus_width;
+
+ switch (width) {
+ case MMC_BUS_WIDTH_8:
+ value = bitfield_replace(value, 12, 1, 0);
+ value = bitfield_replace(value, 18, 1, 1);
+ bus_width = 8;
+ break;
+ case MMC_BUS_WIDTH_4:
+ value = bitfield_replace(value, 12, 1, 1);
+ value = bitfield_replace(value, 18, 1, 0);
+ bus_width = 4;
+ break;
+ default:
+ value = bitfield_replace(value, 12, 1, 0);
+ value = bitfield_replace(value, 18, 1, 0);
+ bus_width = 1;
+ break;
+ };
+ spsdc_pr(INFO, "set bus width to %d bit(s)\n", bus_width);
+ writel(value, host->base + SPSD2_SD_CONF_REG);
+}
+/**
+ * select the working mode of controller: sd/sdio/emmc
+ */
+static void spsdc_select_mode(struct spsdc_host *host, int mode)
+{
+ u32 value = readl(host->base + SPSD2_SD_CONF_REG);
+
+ host->mode = mode;
+ /* set `sdmmcmode', as it will sample data at fall edge
+ * of SD bus clock if `sdmmcmode' is not set when
+ * `sd_high_speed_en' is not set, which is not compliant
+ * with SD specification
+ */
+ value = bitfield_replace(value, 16, 1, 1);
+ switch (mode) {
+ case SPSDC_MODE_EMMC:
+ value = bitfield_replace(value, 20, 1, 0);
+ writel(value, host->base + SPSD2_SD_CONF_REG);
+ break;
+ case SPSDC_MODE_SDIO:
+ value = bitfield_replace(value, 20, 1, 1);
+ writel(value, host->base + SPSD2_SD_CONF_REG);
+ value = readl(host->base + SPSD2_SDIO_CTRL_REG);
+ value = bitfield_replace(value, 6, 1, 1); /* int_multi_trig */
+ writel(value, host->base + SPSD2_SDIO_CTRL_REG);
+ break;
+ case SPSDC_MODE_SD:
+ default:
+ value = bitfield_replace(value, 20, 1, 0);
+ host->mode = SPSDC_MODE_SD;
+ writel(value, host->base + SPSD2_SD_CONF_REG);
+ break;
+ }
+}
+
+static void spsdc_sw_reset(struct spsdc_host *host)
+{
+ spsdc_pr(DEBUG, "sw reset\n");
+ writel(0x7, host->base + SPSD2_SD_RST_REG);
+ writel(0x6, host->base + SPSD2_DMA_STOP_RST_REG);
+ while (readl(host->base + SPSD2_DMA_STOP_RST_REG) & BIT(2))
+ ;
+ /* reset dma operation */
+ writel(0x0, host->base + SPSD2_DMA_CTRL_REG);
+ writel(0x1, host->base + SPSD2_DMA_CTRL_REG);
+ writel(0x0, host->base + SPSD2_DMA_CTRL_REG);
+ spsdc_pr(DEBUG, "sw reset done\n");
+}
+
+static void spsdc_prepare_cmd(struct spsdc_host *host, struct mmc_command *cmd)
+{
+
+ u32 value;
+
+ writeb((u8)(cmd->opcode | 0x40), host->base + SPSD2_SD_CMD_BUF0_REG);
+ writeb((u8)((cmd->arg >> 24) & 0x000000ff), host->base + SPSD2_SD_CMD_BUF1_REG);
+ writeb((u8)((cmd->arg >> 16) & 0x000000ff), host->base + SPSD2_SD_CMD_BUF2_REG);
+ writeb((u8)((cmd->arg >> 8) & 0x000000ff), host->base + SPSD2_SD_CMD_BUF3_REG);
+ writeb((u8)((cmd->arg >> 0) & 0x000000ff), host->base + SPSD2_SD_CMD_BUF4_REG);
+
+ /* disable interrupt if needed */
+ value = readl(host->base + SPSD2_SD_INT_REG);
+ value = bitfield_replace(value, 2, 1, 1); /* sd_cmp_clr */
+ if (likely(!host->use_int || cmd->flags & MMC_RSP_136))
+ value = bitfield_replace(value, 0, 1, 0); /* sdcmpen */
+ else
+ value = bitfield_replace(value, 0, 1, 1);
+ writel(value, host->base + SPSD2_SD_INT_REG);
+
+ value = readl(host->base + SPSD2_SD_CONF0_REG);
+ value = bitfield_replace(value, 4, 2, 0); /* sd_trans_mode */
+ value = bitfield_replace(value, 7, 1, 1); /* sdcmddummy */
+ if (likely(cmd->flags & MMC_RSP_PRESENT)) {
+ value = bitfield_replace(value, 6, 1, 1); /* sdautorsp */
+ } else {
+ value = bitfield_replace(value, 6, 1, 0);
+ writel(value, host->base + SPSD2_SD_CONF0_REG);
+ return;
+ }
+ /*
+ * Currently, host is not capable of checking R2's CRC7,
+ * thus, enable crc7 check only for 48 bit response commands
+ */
+ if (likely(cmd->flags & MMC_RSP_CRC && !(cmd->flags & MMC_RSP_136)))
+ value = bitfield_replace(value, 8, 1, 1); /* sdrspchk_en */
+ else
+ value = bitfield_replace(value, 8, 1, 0);
+ writel(value, host->base + SPSD2_SD_CONF0_REG);
+
+ value = readl(host->base + SPSD2_SD_CONF_REG);
+ if (unlikely(cmd->flags & MMC_RSP_136))
+ value = bitfield_replace(value, 13, 1, 1); /* sdrsptype */
+ else
+ value = bitfield_replace(value, 13, 1, 0);
+ writel(value, host->base + SPSD2_SD_CONF_REG);
+
+}
+
+static void spsdc_prepare_data(struct spsdc_host *host, struct mmc_data *data)
+{
+ u32 value;
+
+ writel(data->blocks - 1, host->base + SPSD2_SD_PAGE_NUM_REG);
+ writel(data->blksz - 1, host->base + SPSD2_BLOCKSIZE_REG);
+ value = readl(host->base + SPSD2_SD_CONF0_REG);
+ if (data->flags & MMC_DATA_READ) {
+ value = bitfield_replace(value, 4, 2, 2); /* sd_trans_mode */
+ value = bitfield_replace(value, 6, 1, 0); /* sdautorsp */
+ value = bitfield_replace(value, 7, 1, 0); /* sdcmddummy */
+ writel(0x12, host->base + SPSD2_DMA_SRCDST_REG);
+ } else {
+ value = bitfield_replace(value, 4, 2, 1);
+ writel(0x21, host->base + SPSD2_DMA_SRCDST_REG);
+ }
+ /* to prevent of the responses of CMD18/25 being by CMD12's,
+ * send CMD12 by ourself instead of by controller automatically
+ *
+ * #if 0
+ * if ((cmd->opcode == MMC_READ_MULTIPLE_BLOCK)
+ * || (cmd->opcode == MMC_WRITE_MULTIPLE_BLOCK))
+ * value = bitfield_replace(value, 2, 1, 0); //sd_len_mode
+ * else
+ * value = bitfield_replace(value, 2, 1, 1);
+ * #endif
+ */
+ value = bitfield_replace(value, 2, 1, 1);
+
+ if (likely(host->dmapio_mode == SPSDC_DMA_MODE)) {
+ struct scatterlist *sg;
+ dma_addr_t dma_addr;
+ unsigned int dma_size;
+ void __iomem *reg_addr;
+ int dma_direction = data->flags & MMC_DATA_READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+ int i, count = dma_map_sg(host->mmc->parent, data->sg, data->sg_len, dma_direction);
+
+ if (unlikely(!count || count > SPSDC_MAX_DMA_MEMORY_SECTORS)) {
+ spsdc_pr(ERROR, "error at dma_mapp_sg: count = %d\n", count);
+ data->error = -EINVAL;
+ return;
+ }
+ for_each_sg(data->sg, sg, count, i) {
+ dma_addr = sg_dma_address(sg);
+ dma_size = sg_dma_len(sg) / data->blksz - 1;
+ //dma_size = sg_dma_len(sg) / 512 - 1;
+ if (i == 0) {
+ writel(dma_addr, host->base + SPSD2_DMA_BASE_ADDR0_REG);
+ writel(dma_addr >> 16, host->base + SPSD2_DMA_BASE_ADDR16_REG);
+ writel(dma_size, host->base + SPSD2_SDRAM_SECTOR_SIZE_REG);
+ } else {
+ reg_addr = host->base + (SPSD2_SDRAM_SECTOR_ADDR_REG + (i - 1) * 8);
+ writel(dma_addr, reg_addr);
+ writel(dma_size, reg_addr + 4);
+ }
+ }
+ value = bitfield_replace(value, 0, 1, 0); /* sdpiomode */
+ writel(value, host->base + SPSD2_SD_CONF0_REG);
+ writel(data->blksz - 1, host->base + SPSD2_DMA_SIZE_REG);
+ /* enable interrupt if needed */
+ if (!host->use_int && data->blksz * data->blocks > host->dma_int_threshold) {
+ host->dma_use_int = 1;
+ value = readl(host->base + SPSD2_SD_INT_REG);
+ value = bitfield_replace(value, 0, 1, 1); /* sdcmpen */
+ writel(value, host->base + SPSD2_SD_INT_REG);
+ }
+ } else {
+ value = bitfield_replace(value, 0, 1, 1);
+ writel(value, host->base + SPSD2_SD_CONF0_REG);
+ }
+}
+
+static inline void spsdc_trigger_transaction(struct spsdc_host *host)
+{
+ u32 value = readl(host->base + SPSD2_SD_CTRL_REG);
+
+ value = bitfield_replace(value, 0, 1, 1); /* trigger transaction */
+ writel(value, host->base + SPSD2_SD_CTRL_REG);
+}
+
+static int __send_stop_cmd(struct spsdc_host *host, struct mmc_command *stop)
+{
+ u32 value;
+
+ spsdc_prepare_cmd(host, stop);
+ value = readl(host->base + SPSD2_SD_INT_REG);
+ value = bitfield_replace(value, 0, 1, 0); /* sdcmpen */
+ writel(value, host->base + SPSD2_SD_INT_REG);
+ spsdc_trigger_transaction(host);
+ if (spsdc_wait_finish(host)) {
+ value = readl(host->base + SPSD2_SD_STATUS_REG);
+ if (value & SPSDC_SDSTATUS_RSP_CRC7_ERROR)
+ stop->error = -EILSEQ;
+ else
+ stop->error = -ETIMEDOUT;
+ return -1;
+ }
+ spsdc_get_rsp(host, stop);
+ return 0;
+}
+
+#ifdef SPSDC_WIDTH_SWITCH
+
+static int __switch_sdio_bus_width(struct spsdc_host *host, int width)
+{
+ struct mmc_command cmd = {0};
+ u8 ctrl;
+ u32 value;
+ int ret = 0;
+
+ cmd.opcode = SD_IO_RW_DIRECT;
+ cmd.arg |= SDIO_CCCR_IF << 9;
+ cmd.flags = MMC_RSP_R5;
+ spsdc_prepare_cmd(host, &cmd);
+ value = readl(host->base + SPSD2_SD_INT_REG);
+ value = bitfield_replace(value, 0, 1, 0); /* sdcmpen */
+ writel(value, host->base + SPSD2_SD_INT_REG);
+ spsdc_trigger_transaction(host);
+ ret = spsdc_wait_finish(host);
+ if (ret) {
+ spsdc_sw_reset(host);
+ return ret;
+ }
+ spsdc_get_rsp(host, &cmd);
+ ctrl = cmd.resp[0] & 0xff;
+
+ ctrl &= ~SDIO_BUS_WIDTH_MASK;
+ if (width == MMC_BUS_WIDTH_4) {
+ /* set to 4-bit bus width */
+ ctrl |= SDIO_BUS_WIDTH_4BIT;
+ }
+
+ cmd.arg |= 0x80000000;
+ cmd.arg |= ctrl;
+ spsdc_prepare_cmd(host, &cmd);
+ value = readl(host->base + SPSD2_SD_INT_REG);
+ value = bitfield_replace(value, 0, 1, 0); /* sdcmpen */
+ writel(value, host->base + SPSD2_SD_INT_REG);
+ spsdc_trigger_transaction(host);
+ ret = spsdc_wait_finish(host);
+ if (ret) {
+ spsdc_sw_reset(host);
+ return ret;
+ }
+ spsdc_get_rsp(host, &cmd);
+ spsdc_set_bus_width(host, width);
+
+ return ret;
+}
+
+#endif
+
+/**
+ * check if error during transaction.
+ * @host - host
+ * @mrq - the mrq
+ * @return 0 if no error otherwise the error number.
+ */
+static int spsdc_check_error(struct spsdc_host *host, struct mmc_request *mrq)
+{
+ int ret = 0;
+ struct mmc_command *cmd = mrq->cmd;
+ struct mmc_data *data = mrq->data;
+ u32 value = readl(host->base + SPSD2_SD_STATE_REG);
+
+ if (unlikely(value & SPSDC_SDSTATE_ERROR)) {
+ u32 timing_cfg0, timing_cfg1;
+
+ spsdc_pr(DEBUG, "%s cmd %d with data %p error!\n", __func__, cmd->opcode, data);
+ spsdc_pr(VERBOSE, "%s sd_state: 0x%08x\n", __func__, value);
+ value = readl(host->base + SPSD2_SD_STATUS_REG);
+ spsdc_pr(VERBOSE, "%s sd_status: 0x%08x\n", __func__, value);
+ timing_cfg0 = readl(host->base + SPSD2_SD_TIMING_CONF0_REG);
+ host->tuning_info.wr_dly = bitfield_extract(timing_cfg0, 12, 3);
+ timing_cfg1 = readl(host->base + SPSD2_SD_TIMING_CONF1_REG);
+ host->tuning_info.rd_dly = bitfield_extract(timing_cfg1, 13, 3);
+ if (value & SPSDC_SDSTATUS_RSP_TIMEOUT) {
+ ret = -ETIMEDOUT;
+ host->tuning_info.wr_dly++;
+ } else if (value & SPSDC_SDSTATUS_RSP_CRC7_ERROR) {
+ ret = -EILSEQ;
+ host->tuning_info.rd_dly++;
+ }
+ if (data) {
+ if ((value & SPSDC_SDSTATUS_STB_TIMEOUT) ||
+ (value & SPSDC_SDSTATUS_CARD_CRC_CHECK_TIMEOUT)) {
+ ret = -ETIMEDOUT;
+ host->tuning_info.rd_dly++;
+ } else if (value & SPSDC_SDSTATUS_CRC_TOKEN_CHECK_ERROR) {
+ ret = -EILSEQ;
+ host->tuning_info.wr_dly++;
+ } else if (value & SPSDC_SDSTATUS_RDATA_CRC16_ERROR) {
+ ret = -EILSEQ;
+ host->tuning_info.rd_dly++;
+ }
+ data->error = ret;
+ data->bytes_xfered = 0;
+ }
+ cmd->error = ret;
+ if (!host->tuning_info.need_tuning)
+ cmd->retries = SPSDC_MAX_RETRIES; /* retry it */
+ spsdc_sw_reset(host);
+ timing_cfg0 = bitfield_replace(timing_cfg0, 12, 3, host->tuning_info.wr_dly);
+ writel(timing_cfg0, host->base + SPSD2_SD_TIMING_CONF0_REG);
+ timing_cfg1 = bitfield_replace(timing_cfg0, 13, 3, host->tuning_info.rd_dly);
+ writel(timing_cfg1, host->base + SPSD2_SD_TIMING_CONF1_REG);
+
+ } else if (data) {
+ data->bytes_xfered = data->blocks * data->blksz;
+ }
+ host->tuning_info.need_tuning = ret;
+ return ret;
+}
+
+
+static inline __maybe_unused void spsdc_txdummy(struct spsdc_host *host)
+{
+ u32 value;
+
+ value = readl(host->base + SPSD2_SD_CTRL_REG);
+ value = bitfield_replace(value, 1, 1, 1); /* trigger tx dummy */
+ writel(value, host->base + SPSD2_SD_CTRL_REG);
+}
+
+static void spsdc_xfer_data_pio(struct spsdc_host *host, struct mmc_data *data)
+{
+ u16 *buf; /* tx/rx 2 bytes one time in pio mode */
+ int data_left = data->blocks * data->blksz;
+ int consumed, remain;
+ struct sg_mapping_iter *sg_miter = &host->sg_miter;
+ unsigned int flags = 0;
+
+ if (data->flags & MMC_DATA_WRITE)
+ flags |= SG_MITER_FROM_SG;
+ else
+ flags |= SG_MITER_TO_SG;
+ sg_miter_start(&host->sg_miter, data->sg, data->sg_len, flags);
+ while (data_left > 0) {
+ consumed = 0;
+ if (!sg_miter_next(sg_miter))
+ break;
+ buf = sg_miter->addr;
+ remain = sg_miter->length;
+ do {
+ if (data->flags & MMC_DATA_WRITE) {
+ if (spsdc_wait_txbuf_empty(host))
+ goto done;
+ writel(*buf, host->base + SPSD2_SD_PIO_TX_REG);
+ } else {
+ if (spsdc_wait_rxbuf_full(host))
+ goto done;
+ *buf = readl(host->base + SPSD2_SD_PIO_RX_REG);
+ }
+ buf++;
+ consumed += 2;
+ remain -= 2;
+ } while (remain);
+ sg_miter->consumed = consumed;
+ data_left -= consumed;
+ }
+done:
+ sg_miter_stop(sg_miter);
+}
+
+static void spsdc_controller_init(struct spsdc_host *host)
+{
+ u32 value;
+ int ret = reset_control_assert(host->rstc);
+
+ if (!ret) {
+ usleep_range(1000, 1250);
+ ret = reset_control_deassert(host->rstc);
+ }
+ if (ret)
+ spsdc_pr(WARNING, "Failed to reset SD controller!\n");
+ value = readl(host->base + SPSD2_MEDIA_TYPE_REG);
+ value = bitfield_replace(value, 0, 3, SPSDC_MEDIA_SD);
+ writel(value, host->base + SPSD2_MEDIA_TYPE_REG);
+}
+
+static void spsdc_set_power_mode(struct spsdc_host *host, struct mmc_ios *ios)
+{
+ if (host->power_state == ios->power_mode)
+ return;
+
+ switch (ios->power_mode) {
+ /* power off->up->on */
+ case MMC_POWER_ON:
+ spsdc_pr(DEBUG, "set MMC_POWER_ON\n");
+ spsdc_controller_init(host);
+ pm_runtime_get_sync(host->mmc->parent);
+ break;
+ case MMC_POWER_UP:
+ spsdc_pr(DEBUG, "set MMC_POWER_UP\n");
+ break;
+ case MMC_POWER_OFF:
+ spsdc_pr(DEBUG, "set MMC_POWER_OFF\n");
+ pm_runtime_put(host->mmc->parent);
+ break;
+ }
+ host->power_state = ios->power_mode;
+}
+
+/**
+ * 1. unmap scatterlist if needed;
+ * 2. get response & check error conditions;
+ * 3. unlock host->mrq_lock
+ * 4. notify mmc layer the request is done
+ */
+static void spsdc_finish_request(struct spsdc_host *host, struct mmc_request *mrq)
+{
+ struct mmc_command *cmd;
+ struct mmc_data *data;
+
+ if (!mrq)
+ return;
+
+ cmd = mrq->cmd;
+ data = mrq->data;
+
+ if (data && SPSDC_DMA_MODE == host->dmapio_mode) {
+ int dma_direction = data->flags & MMC_DATA_READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+
+ dma_unmap_sg(host->mmc->parent, data->sg, data->sg_len, dma_direction);
+ host->dma_use_int = 0;
+ }
+ spsdc_get_rsp(host, cmd);
+ spsdc_check_error(host, mrq);
+ if (mrq->stop) {
+ if (__send_stop_cmd(host, mrq->stop))
+ spsdc_sw_reset(host);
+ }
+ host->mrq = NULL;
+
+#ifdef SPSDC_WIDTH_SWITCH
+ if (host->restore_4bit_sdio_bus) {
+ __switch_sdio_bus_width(host, MMC_BUS_WIDTH_4);
+ host->restore_4bit_sdio_bus = 0;
+ }
+#endif
+
+ mutex_unlock(&host->mrq_lock);
+ spsdc_pr(VERBOSE, "request done > error:%d, cmd:%d, resp:0x%08x\n",
+ cmd->error, cmd->opcode, cmd->resp[0]);
+ mmc_request_done(host->mmc, mrq);
+}
+
+/* Interrupt Service Routine */
+irqreturn_t spsdc_irq(int irq, void *dev_id)
+{
+ struct spsdc_host *host = dev_id;
+ u32 value = readl(host->base + SPSD2_SD_INT_REG);
+
+ spin_lock(&host->lock);
+ if ((value & SPSDC_SDINT_SDCMP) &&
+ (value & SPSDC_SDINT_SDCMPEN)) {
+ value = bitfield_replace(value, 0, 1, 0); /* disable sdcmp */
+ value = bitfield_replace(value, 2, 1, 1); /* sd_cmp_clr */
+ writel(value, host->base + SPSD2_SD_INT_REG);
+ /* we may need send stop command to stop data transaction,
+ * which is time consuming, so make use of tasklet to handle this.
+ */
+ if (host->mrq && host->mrq->stop)
+ tasklet_schedule(&host->tsklet_finish_req);
+ else
+ spsdc_finish_request(host, host->mrq);
+
+ }
+ if ((value & SPSDC_SDINT_SDIO) &&
+ (value & SPSDC_SDINT_SDIOEN)) {
+ mmc_signal_sdio_irq(host->mmc);
+ }
+ spin_unlock(&host->lock);
+ return IRQ_HANDLED;
+}
+
+static void spsdc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+ struct spsdc_host *host = mmc_priv(mmc);
+ struct mmc_data *data;
+ struct mmc_command *cmd;
+
+#ifdef SPSDC_WIDTH_SWITCH
+ int bus_width = mmc->ios.bus_width;
+#endif
+
+ mutex_lock_interruptible(&host->mrq_lock);
+ host->mrq = mrq;
+ data = mrq->data;
+ cmd = mrq->cmd;
+ spsdc_pr(VERBOSE, "%s > cmd:%d, arg:0x%08x, data len:%d\n", __func__,
+ cmd->opcode, cmd->arg, data ? (data->blocks*data->blksz) : 0);
+
+#ifdef SPSDC_WIDTH_SWITCH
+ if (cmd->opcode == SD_IO_RW_EXTENDED && bus_width ==
+ MMC_BUS_WIDTH_4 && data->blocks*data->blksz <= 4) {
+ if (__switch_sdio_bus_width(host, MMC_BUS_WIDTH_1)) {
+ cmd->error = -1;
+ host->mrq = NULL;
+ mutex_unlock(&host->mrq_lock);
+ mmc_request_done(host->mmc, mrq);
+ return;
+ }
+ host->restore_4bit_sdio_bus = 1;
+ }
+#endif
+
+ spsdc_prepare_cmd(host, cmd);
+ /* we need manually read response R2. */
+ if (unlikely(cmd->flags & MMC_RSP_136)) {
+ spsdc_trigger_transaction(host);
+ spsdc_get_rsp(host, cmd);
+ spsdc_wait_finish(host);
+ spsdc_check_error(host, mrq);
+ host->mrq = NULL;
+ spsdc_pr(VERBOSE, "request done > error:%d, cmd:%d, resp:%08x %08x %08x %08x\n",
+ cmd->error, cmd->opcode, cmd->resp[0],
+ cmd->resp[1], cmd->resp[2], cmd->resp[3]);
+ mutex_unlock(&host->mrq_lock);
+ mmc_request_done(host->mmc, mrq);
+ } else {
+ if (data)
+ spsdc_prepare_data(host, data);
+
+ if ((host->dmapio_mode && data) == SPSDC_PIO_MODE) {
+ u32 value;
+ /* pio data transfer do not use interrupt */
+ value = readl(host->base + SPSD2_SD_INT_REG);
+ value = bitfield_replace(value, 0, 1, 0); /* sdcmpen */
+ writel(value, host->base + SPSD2_SD_INT_REG);
+ spsdc_trigger_transaction(host);
+ spsdc_xfer_data_pio(host, data);
+ spsdc_wait_finish(host);
+ spsdc_finish_request(host, mrq);
+ } else {
+ if (!(host->use_int || host->dma_use_int)) {
+ spsdc_trigger_transaction(host);
+ spsdc_wait_finish(host);
+ spsdc_finish_request(host, mrq);
+ } else {
+ spsdc_trigger_transaction(host);
+ }
+ }
+ }
+}
+
+static void spsdc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct spsdc_host *host = (struct spsdc_host *)mmc_priv(mmc);
+
+ mutex_lock(&host->mrq_lock);
+ spsdc_set_power_mode(host, ios);
+ spsdc_set_bus_clk(host, ios->clock);
+ spsdc_set_bus_timing(host, ios->timing);
+ spsdc_set_bus_width(host, ios->bus_width);
+ /* ensure mode is correct, because we might have hw reset the controller */
+ spsdc_select_mode(host, host->mode);
+ mutex_unlock(&host->mrq_lock);
+
+}
+
+/**
+ * Return values for the get_cd callback should be:
+ * 0 for a absent card
+ * 1 for a present card
+ * -ENOSYS when not supported (equal to NULL callback)
+ * or a negative errno value when something bad happened
+ */
+int spsdc_get_cd(struct mmc_host *mmc)
+{
+ int ret = 0;
+
+ if (mmc_can_gpio_cd(mmc))
+ ret = mmc_gpio_get_cd(mmc);
+ else
+ spsdc_pr(WARNING, "no gpio assigned for card detection\n");
+
+ if (ret < 0) {
+ spsdc_pr(ERROR, "Failed to get card presence status\n");
+ ret = 0;
+ }
+
+ return ret;
+}
+
+static void spsdc_enable_sdio_irq(struct mmc_host *mmc, int enable)
+{
+ struct spsdc_host *host = mmc_priv(mmc);
+ u32 value = readl(host->base + SPSD2_SD_INT_REG);
+
+ value = bitfield_replace(value, 6, 1, 1); /* sdio_int_clr */
+ if (enable)
+ value = bitfield_replace(value, 4, 1, 1);
+ else
+ value = bitfield_replace(value, 4, 1, 0);
+ writel(value, host->base + SPSD2_SD_INT_REG);
+}
+
+static const struct mmc_host_ops spsdc_ops = {
+ .request = spsdc_request,
+ .set_ios = spsdc_set_ios,
+ .get_cd = spsdc_get_cd,
+ .enable_sdio_irq = spsdc_enable_sdio_irq,
+};
+
+static void tsklet_func_finish_req(unsigned long data)
+{
+ struct spsdc_host *host = (struct spsdc_host *)data;
+
+ spin_lock(&host->lock);
+ spsdc_finish_request(host, host->mrq);
+ spin_unlock(&host->lock);
+}
+
+static int spsdc_drv_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct mmc_host *mmc;
+ struct resource *resource;
+ struct spsdc_host *host;
+ unsigned int mode;
+
+ mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
+ if (!mmc) {
+ ret = -ENOMEM;
+ goto probe_free_host;
+ }
+
+ host = mmc_priv(mmc);
+ host->mmc = mmc;
+ host->power_state = MMC_POWER_OFF;
+ host->dma_int_threshold = 1024;
+ host->dmapio_mode = SPSDC_DMA_MODE;
+
+ host->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(host->clk)) {
+ spsdc_pr(ERROR, "Can not find clock source\n");
+ ret = PTR_ERR(host->clk);
+ goto probe_free_host;
+ }
+
+ host->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
+ if (IS_ERR(host->rstc)) {
+ spsdc_pr(ERROR, "Can not find reset controller\n");
+ ret = PTR_ERR(host->rstc);
+ goto probe_free_host;
+ }
+
+ resource = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (IS_ERR(resource)) {
+ spsdc_pr(ERROR, "get sd register resource fail\n");
+ ret = PTR_ERR(resource);
+ goto probe_free_host;
+ }
+
+ host->base = devm_ioremap_resource(&pdev->dev, resource);
+ if (IS_ERR((void *)host->base)) {
+ spsdc_pr(ERROR, "devm_ioremap_resource fail\n");
+ ret = PTR_ERR((void *)host->base);
+ goto probe_free_host;
+ }
+
+ host->irq = platform_get_irq(pdev, 0);
+ if (host->irq <= 0) {
+ spsdc_pr(ERROR, "get sd irq resource fail\n");
+ ret = -EINVAL;
+ goto probe_free_host;
+ }
+ if (devm_request_irq(&pdev->dev, host->irq, spsdc_irq,
+ IRQF_SHARED, dev_name(&pdev->dev), host)) {
+ spsdc_pr(ERROR, "Failed to request sd card interrupt.\n");
+ ret = -ENOENT;
+ goto probe_free_host;
+ }
+ spsdc_pr(INFO, "spsdc driver probe, reg base:0x%p, irq:%d\n", host->base, host->irq);
+
+
+ ret = mmc_of_parse(mmc);
+ if (ret)
+ goto probe_free_host;
+
+ ret = clk_prepare(host->clk);
+ if (ret)
+ goto probe_free_host;
+
+ ret = clk_enable(host->clk);
+ if (ret)
+ goto probe_clk_unprepare;
+
+ spin_lock_init(&host->lock);
+ mutex_init(&host->mrq_lock);
+ tasklet_init(&host->tsklet_finish_req, tsklet_func_finish_req, (unsigned long)host);
+ mmc->ops = &spsdc_ops;
+ mmc->f_min = SPSDC_MIN_CLK;
+ if (mmc->f_max > SPSDC_MAX_CLK) {
+ spsdc_pr(DEBUG, "max-frequency is too high, set it to %d\n", SPSDC_MAX_CLK);
+ mmc->f_max = SPSDC_MAX_CLK;
+ }
+ mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
+ mmc->max_seg_size = SPSDC_MAX_BLK_COUNT * 512;
+ /* Host controller supports up to "SPSDC_MAX_DMA_MEMORY_SECTORS",
+ * a.k.a. max scattered memory segments per request
+ */
+ /* Limited by the max value of dma_size & data_length, set it to 512 bytes for now */
+ mmc->max_segs = SPSDC_MAX_DMA_MEMORY_SECTORS;
+ mmc->max_req_size = SPSDC_MAX_BLK_COUNT * 512;
+ mmc->max_blk_size = 512;
+ mmc->max_blk_count = SPSDC_MAX_BLK_COUNT; /* Limited by sd_page_num */
+
+ dev_set_drvdata(&pdev->dev, host);
+ spsdc_controller_init(host);
+ mode = (int)of_device_get_match_data(&pdev->dev);
+ spsdc_select_mode(host, mode);
+ mmc_add_host(mmc);
+ pm_runtime_set_active(&pdev->dev);
+ pm_runtime_enable(&pdev->dev);
+
+ return 0;
+
+probe_clk_unprepare:
+ spsdc_pr(ERROR, "unable to enable controller clock\n");
+ clk_unprepare(host->clk);
+probe_free_host:
+ if (mmc)
+ mmc_free_host(mmc);
+
+ return ret;
+}
+
+static int spsdc_drv_remove(struct platform_device *dev)
+{
+ struct spsdc_host *host = platform_get_drvdata(dev);
+
+ mmc_remove_host(host->mmc);
+ clk_disable(host->clk);
+ clk_unprepare(host->clk);
+ pm_runtime_disable(&dev->dev);
+ platform_set_drvdata(dev, NULL);
+ mmc_free_host(host->mmc);
+
+ return 0;
+}
+
+
+static int spsdc_drv_suspend(struct platform_device *dev, pm_message_t state)
+{
+ struct spsdc_host *host;
+
+ host = platform_get_drvdata(dev);
+ mutex_lock(&host->mrq_lock); /* Make sure that no one is holding the controller */
+ mutex_unlock(&host->mrq_lock);
+ clk_disable(host->clk);
+ return 0;
+}
+
+static int spsdc_drv_resume(struct platform_device *dev)
+{
+ struct spsdc_host *host;
+
+ host = platform_get_drvdata(dev);
+ return clk_enable(host->clk);
+}
+
+#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
+static int spsdc_pm_suspend(struct device *dev)
+{
+ pm_runtime_force_suspend(dev);
+ return 0;
+}
+
+static int spsdc_pm_resume(struct device *dev)
+{
+ pm_runtime_force_resume(dev);
+ return 0;
+}
+#endif /* ifdef CONFIG_PM_SLEEP */
+
+#ifdef CONFIG_PM_RUNTIME_SD
+static int spsdc_pm_runtime_suspend(struct device *dev)
+{
+ struct spsdc_host *host;
+
+ host = dev_get_drvdata(dev);
+ if (__clk_is_enabled(host->clk))
+ clk_disable(host->clk);
+ return 0;
+}
+
+static int spsdc_pm_runtime_resume(struct device *dev)
+{
+ struct spsdc_host *host;
+ int ret = 0;
+
+ host = dev_get_drvdata(dev);
+ if (!host->mmc)
+ return -EINVAL;
+ if (mmc_can_gpio_cd(host->mmc)) {
+ ret = mmc_gpio_get_cd(host->mmc);
+ if (!ret) {
+ spsdc_pr(DEBUG, "No card insert\n");
+ return 0;
+ }
+ }
+ return clk_enable(host->clk);
+}
+#endif /* ifdef CONFIG_PM_RUNTIME_SD */
+
+static const struct dev_pm_ops spsdc_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(spsdc_pm_suspend, spsdc_pm_resume)
+#ifdef CONFIG_PM_RUNTIME_SD
+ SET_RUNTIME_PM_OPS(spsdc_pm_runtime_suspend, spsdc_pm_runtime_resume, NULL)
+#endif
+};
+#endif /* ifdef CONFIG_PM */
+
+static const struct of_device_id spsdc_of_table[] = {
+ {
+ .compatible = "sunplus,sp7021-card1",
+ .data = (void *)SPSDC_MODE_SD,
+ },
+ {
+ .compatible = "sunplus,sp7021-sdio",
+ .data = (void *)SPSDC_MODE_SDIO,
+ },
+ {/* sentinel */}
+
+};
+MODULE_DEVICE_TABLE(of, spsdc_of_table);
+
+static struct platform_driver spsdc_driver = {
+ .probe = spsdc_drv_probe,
+ .remove = spsdc_drv_remove,
+ .suspend = spsdc_drv_suspend,
+ .resume = spsdc_drv_resume,
+ .driver = {
+ .name = "spsdc",
+ .owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &spsdc_pm_ops,
+#endif
+ .of_match_table = spsdc_of_table,
+ },
+};
+module_platform_driver(spsdc_driver);
+
+MODULE_AUTHOR("lh.kuo <lh.kuo@sunplus.com>");
+MODULE_DESCRIPTION("Sunplus SD/SDIO host controller v2.0 driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mmc/host/sunplus_sd2.h b/drivers/mmc/host/sunplus_sd2.h
new file mode 100644
index 0000000..65760ec
--- /dev/null
+++ b/drivers/mmc/host/sunplus_sd2.h
@@ -0,0 +1,155 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/**
+ * (C) Copyright 2019 Sunplus Technology. <http://www.sunplus.com/>
+ *
+ * Sunplus SD host controller v2.0
+ */
+#ifndef __SPSDC_H__
+#define __SPSDC_H__
+
+#include <linux/types.h>
+#include <linux/spinlock_types.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/scatterlist.h>
+#include <linux/clk.h>
+#include <linux/of.h>
+#include <linux/mmc/core.h>
+#include <linux/mmc/host.h>
+
+
+#define SPSDC_WIDTH_SWITCH
+
+#define SPSDC_MIN_CLK 400000
+#define SPSDC_MAX_CLK 52000000
+#define SPSDC_50M_CLK 50000000
+
+#define SPSDC_MAX_BLK_COUNT 65536
+
+#define __rsvd_regs(l) __append_suffix(l, __COUNTER__)
+#define __append_suffix(l, s) _append_suffix(l, s)
+#define _append_suffix(l, s) (reserved##s[l])
+
+#define SPSD2_MEDIA_TYPE_REG 0x0000
+#define SPSDC_MEDIA_NONE 0
+#define SPSDC_MEDIA_SD 6
+#define SPSDC_MEDIA_MS 7
+
+
+#define SPSD2_SDRAM_SECTOR_SIZE_REG 0x0010
+
+#define SPSDC_MAX_DMA_MEMORY_SECTORS 8 /* support up to 8 fragmented memory blocks */
+
+#define SPSD2_SDRAM_SECTOR_ADDR_REG 0x001C
+
+#define SPSD2_SD_INT_REG 0x00B0
+#define SPSDC_SDINT_SDCMPEN BIT(0)
+#define SPSDC_SDINT_SDCMP BIT(1)
+#define SPSDC_SDINT_SDIOEN BIT(4)
+#define SPSDC_SDINT_SDIO BIT(5)
+
+#define SPSD2_SD_PAGE_NUM_REG 0x00B4
+#define SPSD2_SD_CONF0_REG 0x00B8
+#define SPSD2_SDIO_CTRL_REG 0x00Bc
+#define SPSD2_SD_RST_REG 0x00C0
+
+#define SPSD2_SD_CONF_REG 0x00C4
+#define SPSDC_MODE_SDIO 2
+#define SPSDC_MODE_EMMC 1
+#define SPSDC_MODE_SD 0
+
+#define SPSD2_SD_CTRL_REG 0x00C8
+#define SPSDC_SDSTATUS_DUMMY_READY BIT(0)
+#define SPSDC_SDSTATUS_RSP_BUF_FULL BIT(1)
+#define SPSDC_SDSTATUS_TX_DATA_BUF_EMPTY BIT(2)
+#define SPSDC_SDSTATUS_RX_DATA_BUF_FULL BIT(3)
+#define SPSDC_SDSTATUS_CMD_PIN_STATUS BIT(4)
+#define SPSDC_SDSTATUS_DAT0_PIN_STATUS BIT(5)
+#define SPSDC_SDSTATUS_RSP_TIMEOUT BIT(6)
+#define SPSDC_SDSTATUS_CARD_CRC_CHECK_TIMEOUT BIT(7)
+#define SPSDC_SDSTATUS_STB_TIMEOUT BIT(8)
+#define SPSDC_SDSTATUS_RSP_CRC7_ERROR BIT(9)
+#define SPSDC_SDSTATUS_CRC_TOKEN_CHECK_ERROR BIT(10)
+#define SPSDC_SDSTATUS_RDATA_CRC16_ERROR BIT(11)
+#define SPSDC_SDSTATUS_SUSPEND_STATE_READY BIT(12)
+#define SPSDC_SDSTATUS_BUSY_CYCLE BIT(13)
+
+#define SPSD2_SD_STATUS_REG 0x00CC
+
+#define SPSD2_SD_STATE_REG 0x00D0
+#define SPSDC_SDSTATE_IDLE (0x0)
+#define SPSDC_SDSTATE_TXDUMMY (0x1)
+#define SPSDC_SDSTATE_TXCMD (0x2)
+#define SPSDC_SDSTATE_RXRSP (0x3)
+#define SPSDC_SDSTATE_TXDATA (0x4)
+#define SPSDC_SDSTATE_RXCRC (0x5)
+#define SPSDC_SDSTATE_RXDATA (0x5)
+#define SPSDC_SDSTATE_MASK (0x7)
+#define SPSDC_SDSTATE_BADCRC (0x5)
+#define SPSDC_SDSTATE_ERROR BIT(13)
+#define SPSDC_SDSTATE_FINISH BIT(14)
+
+#define SPSD2_BLOCKSIZE_REG 0x00D4
+#define SPSD2_SD_TIMING_CONF0_REG 0x00Dc
+#define SPSD2_SD_TIMING_CONF1_REG 0x00E0
+#define SPSD2_SD_PIO_TX_REG 0x00E4
+#define SPSD2_SD_PIO_RX_REG 0x00E8
+#define SPSD2_SD_CMD_BUF0_REG 0x00Ec
+#define SPSD2_SD_CMD_BUF1_REG 0x00F0
+#define SPSD2_SD_CMD_BUF2_REG 0x00F4
+#define SPSD2_SD_CMD_BUF3_REG 0x00F8
+#define SPSD2_SD_CMD_BUF4_REG 0x00Fc
+
+#define SPSD2_SD_RSP_BUF0_3_REG 0x0100
+#define SPSD2_SD_RSP_BUF4_5_REG 0x0104
+
+#define SPSD2_DMA_SRCDST_REG 0x0204
+#define SPSD2_DMA_SIZE_REG 0x0208
+#define SPSD2_DMA_STOP_RST_REG 0x020c
+#define SPSD2_DMA_CTRL_REG 0x0210
+#define SPSD2_DMA_BASE_ADDR0_REG 0x0214
+#define SPSD2_DMA_BASE_ADDR16_REG 0x0218
+
+struct spsdc_tuning_info {
+ int need_tuning;
+#define SPSDC_MAX_RETRIES (8 * 8)
+ int retried; /* how many times has been retried */
+ u32 wr_dly:3;
+ u32 rd_dly:3;
+ u32 clk_dly:3;
+};
+
+struct spsdc_host {
+ void __iomem *base;
+ struct clk *clk;
+ struct reset_control *rstc;
+ int mode; /* SD/SDIO/eMMC */
+ spinlock_t lock; /* controller lock */
+ struct mutex mrq_lock;
+ /* tasklet used to handle error then finish the request */
+ struct tasklet_struct tsklet_finish_req;
+ struct mmc_host *mmc;
+ struct mmc_request *mrq; /* current mrq */
+
+ int irq;
+ int use_int; /* should raise irq when done */
+ int power_state; /* current power state: off/up/on */
+
+
+#ifdef SPSDC_WIDTH_SWITCH
+ int restore_4bit_sdio_bus;
+#endif
+
+#define SPSDC_DMA_MODE 0
+#define SPSDC_PIO_MODE 1
+ int dmapio_mode;
+ /* for purpose of reducing context switch, only when transfer data that
+ * length is greater than `dma_int_threshold' should use interrupt
+ */
+ int dma_int_threshold;
+ int dma_use_int; /* should raise irq when dma done */
+ struct sg_mapping_iter sg_miter; /* for pio mode to access sglist */
+ struct spsdc_tuning_info tuning_info;
+};
+
+#endif /* #ifndef __SPSDC_H__ */
--
2.7.4