[U-Boot] [PATCH 06/13] mmc: Add JZ47xx SD/MMC controller driver

Marek Vasut
2016-12-01T01:06:34Z

From: Paul Burton <paul.burton@imgtec.com>

Add driver for the JZ47xx MSC controller.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
---
drivers/mmc/Kconfig | 6 +
drivers/mmc/Makefile | 1 +
drivers/mmc/jz_mmc.c | 445 +++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 452 insertions(+)
create mode 100644 drivers/mmc/jz_mmc.c

diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 5e84a41..da26743 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -101,6 +101,12 @@ config MMC_UNIPHIER
help
This selects support for the SD/MMC Host Controller on UniPhier SoCs.

+config JZ47XX_MMC
+ bool "Ingenic JZ47xx SD/MMC Host Controller support"
+ depends on ARCH_JZ47XX
+ help
+ This selects support for the SD Card Controller on Ingenic JZ47xx SoCs.
+
config SANDBOX_MMC
bool "Sandbox MMC support"
depends on MMC && SANDBOX
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index d850758..5f7cca3 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -57,6 +57,7 @@ obj-$(CONFIG_TEGRA_MMC) += tegra_mmc.o
obj-$(CONFIG_MMC_UNIPHIER) += uniphier-sd.o
obj-$(CONFIG_ZYNQ_SDHCI) += zynq_sdhci.o
obj-$(CONFIG_ROCKCHIP_SDHCI) += rockchip_sdhci.o
+obj-$(CONFIG_JZ47XX_MMC) += jz_mmc.o

ifdef CONFIG_SPL_BUILD
obj-$(CONFIG_SPL_MMC_BOOT) += fsl_esdhc_spl.o
diff --git a/drivers/mmc/jz_mmc.c b/drivers/mmc/jz_mmc.c
new file mode 100644
index 0000000..95b3367
--- /dev/null
+++ b/drivers/mmc/jz_mmc.c
@@ -0,0 +1,445 @@
+/*
+ * Ingenic JZ MMC driver
+ *
+ * Copyright (c) 2013 Imagination Technologies
+ * Author: Paul Burton <paul.burton@imgtec.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <mmc.h>
+#include <errno.h>
+#include <asm/io.h>
+#include <asm/unaligned.h>
+#include <mach/jz4780.h>
+#include <wait_bit.h>
+
+/* Registers */
+#define MSC_STRPCL 0x000
+#define MSC_STAT 0x004
+#define MSC_CLKRT 0x008
+#define MSC_CMDAT 0x00c
+#define MSC_RESTO 0x010
+#define MSC_RDTO 0x014
+#define MSC_BLKLEN 0x018
+#define MSC_NOB 0x01c
+#define MSC_SNOB 0x020
+#define MSC_IMASK 0x024
+#define MSC_IREG 0x028
+#define MSC_CMD 0x02c
+#define MSC_ARG 0x030
+#define MSC_RES 0x034
+#define MSC_RXFIFO 0x038
+#define MSC_TXFIFO 0x03c
+#define MSC_LPM 0x040
+#define MSC_DMAC 0x044
+#define MSC_DMANDA 0x048
+#define MSC_DMADA 0x04c
+#define MSC_DMALEN 0x050
+#define MSC_DMACMD 0x054
+#define MSC_CTRL2 0x058
+#define MSC_RTCNT 0x05c
+#define MSC_DBG 0x0fc
+
+/* MSC Clock and Control Register (MSC_STRPCL) */
+#define MSC_STRPCL_EXIT_MULTIPLE BIT(7)
+#define MSC_STRPCL_EXIT_TRANSFER BIT(6)
+#define MSC_STRPCL_START_READWAIT BIT(5)
+#define MSC_STRPCL_STOP_READWAIT BIT(4)
+#define MSC_STRPCL_RESET BIT(3)
+#define MSC_STRPCL_START_OP BIT(2)
+#define MSC_STRPCL_CLOCK_CONTROL_STOP BIT(0)
+#define MSC_STRPCL_CLOCK_CONTROL_START BIT(1)
+
+/* MSC Status Register (MSC_STAT) */
+#define MSC_STAT_AUTO_CMD_DONE BIT(31)
+#define MSC_STAT_IS_RESETTING BIT(15)
+#define MSC_STAT_SDIO_INT_ACTIVE BIT(14)
+#define MSC_STAT_PRG_DONE BIT(13)
+#define MSC_STAT_DATA_TRAN_DONE BIT(12)
+#define MSC_STAT_END_CMD_RES BIT(11)
+#define MSC_STAT_DATA_FIFO_AFULL BIT(10)
+#define MSC_STAT_IS_READWAIT BIT(9)
+#define MSC_STAT_CLK_EN BIT(8)
+#define MSC_STAT_DATA_FIFO_FULL BIT(7)
+#define MSC_STAT_DATA_FIFO_EMPTY BIT(6)
+#define MSC_STAT_CRC_RES_ERR BIT(5)
+#define MSC_STAT_CRC_READ_ERROR BIT(4)
+#define MSC_STAT_CRC_WRITE_ERROR BIT(2)
+#define MSC_STAT_CRC_WRITE_ERROR_NOSTS BIT(4)
+#define MSC_STAT_TIME_OUT_RES BIT(1)
+#define MSC_STAT_TIME_OUT_READ BIT(0)
+
+/* MSC Bus Clock Control Register (MSC_CLKRT) */
+#define MSC_CLKRT_CLK_RATE_MASK 0x7
+
+/* MSC Command Sequence Control Register (MSC_CMDAT) */
+#define MSC_CMDAT_IO_ABORT BIT(11)
+#define MSC_CMDAT_BUS_WIDTH_1BIT (0x0 << 9)
+#define MSC_CMDAT_BUS_WIDTH_4BIT (0x2 << 9)
+#define MSC_CMDAT_DMA_EN BIT(8)
+#define MSC_CMDAT_INIT BIT(7)
+#define MSC_CMDAT_BUSY BIT(6)
+#define MSC_CMDAT_STREAM_BLOCK BIT(5)
+#define MSC_CMDAT_WRITE BIT(4)
+#define MSC_CMDAT_DATA_EN BIT(3)
+#define MSC_CMDAT_RESPONSE_MASK 0x7
+#define MSC_CMDAT_RESPONSE_NONE 0x0 /* No response */
+#define MSC_CMDAT_RESPONSE_R1 0x1 /* Format R1 and R1b */
+#define MSC_CMDAT_RESPONSE_R2 0x2 /* Format R2 */
+#define MSC_CMDAT_RESPONSE_R3 0x3 /* Format R3 */
+#define MSC_CMDAT_RESPONSE_R4 0x4 /* Format R4 */
+#define MSC_CMDAT_RESPONSE_R5 0x5 /* Format R5 */
+#define MSC_CMDAT_RESPONSE_R6 0x6 /* Format R6 */
+
+/* MSC Interrupts Mask Register (MSC_IMASK) */
+#define MSC_IMASK_TIME_OUT_RES BIT(9)
+#define MSC_IMASK_TIME_OUT_READ BIT(8)
+#define MSC_IMASK_SDIO BIT(7)
+#define MSC_IMASK_TXFIFO_WR_REQ BIT(6)
+#define MSC_IMASK_RXFIFO_RD_REQ BIT(5)
+#define MSC_IMASK_END_CMD_RES BIT(2)
+#define MSC_IMASK_PRG_DONE BIT(1)
+#define MSC_IMASK_DATA_TRAN_DONE BIT(0)
+
+
+/* MSC Interrupts Status Register (MSC_IREG) */
+#define MSC_IREG_TIME_OUT_RES BIT(9)
+#define MSC_IREG_TIME_OUT_READ BIT(8)
+#define MSC_IREG_SDIO BIT(7)
+#define MSC_IREG_TXFIFO_WR_REQ BIT(6)
+#define MSC_IREG_RXFIFO_RD_REQ BIT(5)
+#define MSC_IREG_END_CMD_RES BIT(2)
+#define MSC_IREG_PRG_DONE BIT(1)
+#define MSC_IREG_DATA_TRAN_DONE BIT(0)
+
+struct jz_mmc_priv {
+ struct mmc_config cfg;
+ void __iomem *regs;
+ u32 flags;
+/* priv flags */
+#define JZ_MMC_BUS_WIDTH_MASK 0x3
+#define JZ_MMC_BUS_WIDTH_1 0x0
+#define JZ_MMC_BUS_WIDTH_4 0x2
+#define JZ_MMC_BUS_WIDTH_8 0x3
+#define JZ_MMC_SENT_INIT BIT(2)
+};
+
+static int jz_mmc_clock_rate(void)
+{
+ return 24000000;
+}
+
+static int jz_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
+ struct mmc_data *data)
+{
+ struct jz_mmc_priv *priv = mmc->priv;
+ u32 stat, mask, cmdat = 0;
+
+ /* stop the clock */
+ writel(MSC_STRPCL_CLOCK_CONTROL_STOP, priv->regs + MSC_STRPCL);
+
+ wait_for_bit("jzmmc", priv->regs + MSC_STAT,
+ MSC_STAT_CLK_EN, 0, 10, 0);
+
+ writel(0, priv->regs + MSC_DMAC);
+
+ /* setup command */
+ writel(cmd->cmdidx, priv->regs + MSC_CMD);
+ writel(cmd->cmdarg, priv->regs + MSC_ARG);
+
+ if (data) {
+ /* setup data */
+ cmdat |= MSC_CMDAT_DATA_EN;
+ if (data->flags & MMC_DATA_WRITE)
+ cmdat |= MSC_CMDAT_WRITE;
+
+ writel(data->blocks, priv->regs + MSC_NOB);
+ writel(data->blocksize, priv->regs + MSC_BLKLEN);
+ } else {
+ writel(0, priv->regs + MSC_NOB);
+ writel(0, priv->regs + MSC_BLKLEN);
+ }
+
+ /* setup response */
+ switch (cmd->resp_type) {
+ case MMC_RSP_NONE:
+ break;
+ case MMC_RSP_R1:
+ case MMC_RSP_R1b:
+ cmdat |= MSC_CMDAT_RESPONSE_R1;
+ break;
+ case MMC_RSP_R2:
+ cmdat |= MSC_CMDAT_RESPONSE_R2;
+ break;
+ case MMC_RSP_R3:
+ cmdat |= MSC_CMDAT_RESPONSE_R3;
+ break;
+ default:
+ break;
+ }
+
+ if (cmd->resp_type & MMC_RSP_BUSY)
+ cmdat |= MSC_CMDAT_BUSY;
+
+ /* set init for the first command only */
+ if (!(priv->flags & JZ_MMC_SENT_INIT)) {
+ cmdat |= MSC_CMDAT_INIT;
+ priv->flags |= JZ_MMC_SENT_INIT;
+ }
+
+ cmdat |= (priv->flags & JZ_MMC_BUS_WIDTH_MASK) << 9;
+
+ /* write the data setup */
+ writel(cmdat, priv->regs + MSC_CMDAT);
+
+ /* unmask interrupts */
+ mask = 0xffffffff & ~(MSC_IMASK_END_CMD_RES | MSC_IMASK_TIME_OUT_RES);
+ if (data) {
+ mask &= ~MSC_IMASK_DATA_TRAN_DONE;
+ if (data->flags & MMC_DATA_WRITE) {
+ mask &= ~MSC_IMASK_TXFIFO_WR_REQ;
+ } else {
+ mask &= ~(MSC_IMASK_RXFIFO_RD_REQ |
+ MSC_IMASK_TIME_OUT_READ);
+ }
+ }
+ writel(mask, priv->regs + MSC_IMASK);
+
+ /* clear interrupts */
+ writel(0xffffffff, priv->regs + MSC_IREG);
+
+ /* start the command (& the clock) */
+ writel(MSC_STRPCL_START_OP | MSC_STRPCL_CLOCK_CONTROL_START,
+ priv->regs + MSC_STRPCL);
+
+ /* wait for completion */
+ wait_for_bit("jzmmc", priv->regs + MSC_IREG,
+ MSC_IREG_END_CMD_RES | MSC_IREG_TIME_OUT_RES, 1, 1, 0);
+ stat = readl(priv->regs + MSC_IREG);
+ stat &= MSC_IREG_END_CMD_RES | MSC_IREG_TIME_OUT_RES;
+ writel(stat, priv->regs + MSC_IREG);
+ if (stat & MSC_IREG_TIME_OUT_RES)
+ return -ETIMEDOUT;
+
+ if (cmd->resp_type & MMC_RSP_PRESENT) {
+ /* read the response */
+ if (cmd->resp_type & MMC_RSP_136) {
+ u16 a, b, c, i;
+ a = readw(priv->regs + MSC_RES);
+ for (i = 0; i < 4; i++) {
+ b = readw(priv->regs + MSC_RES);
+ c = readw(priv->regs + MSC_RES);
+ cmd->response[i] = (a << 24) | (b << 8) |
+ (c >> 8);
+ a = c;
+ }
+ } else {
+ cmd->response[0] = readw(priv->regs + MSC_RES) << 24;
+ cmd->response[0] |= readw(priv->regs + MSC_RES) << 8;
+ cmd->response[0] |= readw(priv->regs + MSC_RES) & 0xff;
+ }
+ }
+
+ if (data && (data->flags & MMC_DATA_WRITE)) {
+ /* write the data */
+ int sz = DIV_ROUND_UP(data->blocks * data->blocksize, 4);
+ const void *buf = data->src;
+
+ while (sz--) {
+ u32 val = get_unaligned_le32(buf);
+ wait_for_bit("jzmmc", priv->regs + MSC_IREG,
+ MSC_IREG_TXFIFO_WR_REQ, 1, 50, 0);
+ writel(val, priv->regs + MSC_TXFIFO);
+ buf += 4;
+ }
+ } else if (data && (data->flags & MMC_DATA_READ)) {
+ /* read the data */
+ int sz = data->blocks * data->blocksize;
+ void *buf = data->dest;
+
+ do {
+ stat = readl(priv->regs + MSC_STAT);
+
+ if (stat & MSC_STAT_TIME_OUT_READ)
+ return -ETIMEDOUT;
+ if (stat & MSC_STAT_CRC_READ_ERROR)
+ return -EILSEQ;
+ if (stat & MSC_STAT_DATA_FIFO_EMPTY) {
+ udelay(10);
+ continue;
+ }
+ do {
+ u32 val = readl(priv->regs + MSC_RXFIFO);
+
+ if (sz == 1)
+ *(u8 *)buf = (u8)val;
+ else if (sz == 2)
+ put_unaligned_le16(val, buf);
+ else if (sz >= 4)
+ put_unaligned_le32(val, buf);
+ buf += 4;
+ sz -= 4;
+ stat = readl(priv->regs + MSC_STAT);
+ } while (!(stat & MSC_STAT_DATA_FIFO_EMPTY));
+ } while (!(stat & MSC_STAT_DATA_TRAN_DONE));
+ }
+
+ return 0;
+}
+
+static void jz_mmc_set_ios(struct mmc *mmc)
+{
+ struct jz_mmc_priv *priv = mmc->priv;
+ u32 real_rate = jz_mmc_clock_rate();
+ u8 clk_div = 0;
+
+ /* calculate clock divide */
+ while ((real_rate > mmc->clock) && (clk_div < 7)) {
+ real_rate >>= 1;
+ clk_div++;
+ }
+ writel(clk_div & MSC_CLKRT_CLK_RATE_MASK, priv->regs + MSC_CLKRT);
+
+ /* set the bus width for the next command */
+ priv->flags &= ~JZ_MMC_BUS_WIDTH_MASK;
+ if (mmc->bus_width == 8)
+ priv->flags |= JZ_MMC_BUS_WIDTH_8;
+ else if (mmc->bus_width == 4)
+ priv->flags |= JZ_MMC_BUS_WIDTH_4;
+ else
+ priv->flags |= JZ_MMC_BUS_WIDTH_1;
+}
+
+static int jz_mmc_core_init(struct mmc *mmc)
+{
+ struct jz_mmc_priv *priv = mmc->priv;
+
+ /* Reset */
+ writel(MSC_STRPCL_RESET, priv->regs + MSC_STRPCL);
+
+ wait_for_bit("jzmmc", priv->regs + MSC_STAT,
+ MSC_STAT_IS_RESETTING, 0, 10, 0);
+
+ /* Maximum timeouts */
+ writel(0xffff, priv->regs + MSC_RESTO);
+ writel(0xffffffff, priv->regs + MSC_RDTO);
+
+ /* Enable low power mode */
+ writel(0x1, priv->regs + MSC_LPM);
+
+ return 0;
+}
+
+static const struct mmc_ops jz_msc_ops = {
+ .send_cmd = jz_mmc_send_cmd,
+ .set_ios = jz_mmc_set_ios,
+ .init = jz_mmc_core_init,
+};
+
+#ifdef CONFIG_MMC_TINY
+static struct jz_mmc_priv jz_mmc_priv_static = {
+ .cfg = {
+ .name = "MSC",
+ .ops = &jz_msc_ops,
+
+ .voltages = MMC_VDD_27_28 | MMC_VDD_28_29 | MMC_VDD_29_30 |
+ MMC_VDD_30_31 | MMC_VDD_31_32 | MMC_VDD_32_33 |
+ MMC_VDD_33_34 | MMC_VDD_34_35 | MMC_VDD_35_36,
+ .host_caps = MMC_MODE_4BIT | MMC_MODE_HS_52MHz | MMC_MODE_HS,
+
+ .f_min = 375000,
+ .f_max = 48000000,
+ .b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT,
+ },
+};
+
+int jz_mmc_init(void __iomem *base)
+{
+ struct mmc *mmc;
+
+ jz_mmc_priv_static.regs = base;
+
+ mmc = mmc_create(&jz_mmc_priv_static.cfg, &jz_mmc_priv_static);
+
+ return mmc ? 0 : -ENODEV;
+}
+#endif
+
+#ifdef CONFIG_DM_MMC
+#include <dm.h>
+DECLARE_GLOBAL_DATA_PTR;
+
+static int jz_mmc_ofdata_to_platdata(struct udevice *dev)
+{
+ struct jz_mmc_priv *priv = dev_get_priv(dev);
+ const void *fdt = gd->fdt_blob;
+ int node = dev->of_offset;
+ struct mmc_config *cfg;
+ int val;
+
+ priv->regs = map_physmem(dev_get_addr(dev), 0x100, MAP_NOCACHE);
+ cfg = &priv->cfg;
+
+ cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS;
+ val = fdtdec_get_int(fdt, node, "bus-width", 1);
+ if (val < 0) {
+ printf("error: bus-width property missing\n");
+ return -ENOENT;
+ }
+
+ switch (val) {
+ case 0x8:
+ cfg->host_caps |= MMC_MODE_8BIT;
+ case 0x4:
+ cfg->host_caps |= MMC_MODE_4BIT;
+ case 0x1:
+ break;
+ default:
+ printf("error: invalid bus-width property\n");
+ return -ENOENT;
+ }
+
+ cfg->f_min = 400000;
+ cfg->f_max = fdtdec_get_int(fdt, node, "max-frequency", 52000000);
+ cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
+ cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
+
+ return 0;
+}
+
+static int jz_mmc_probe(struct udevice *dev)
+{
+ struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+ struct jz_mmc_priv *priv = dev_get_priv(dev);
+ struct mmc_config *cfg = &priv->cfg;
+ struct mmc *mmc;
+
+ cfg->name = "MSC";
+ cfg->ops = &jz_msc_ops;
+
+ mmc = mmc_create(cfg, priv);
+ if (!mmc)
+ return -ENODEV;
+
+ mmc->dev = dev;
+ upriv->mmc = mmc;
+
+ return 0;
+}
+static const struct udevice_id jz_mmc_ids[] = {
+ { .compatible = "ingenic,jz4780-mmc" },
+ { }
+};
+
+U_BOOT_DRIVER(jz_mmc_drv) = {
+ .name = "jz_mmc",
+ .id = UCLASS_MMC,
+ .of_match = jz_mmc_ids,
+ .ofdata_to_platdata = jz_mmc_ofdata_to_platdata,
+ .probe = jz_mmc_probe,
+ .priv_auto_alloc_size = sizeof(struct jz_mmc_priv),
+};
+#endif
--
2.10.2