[U-Boot] [PATCH v1 10/12] rockchip: Add an rk3036 MMC driver
Lin Huang
hl at rock-chips.com
Wed Oct 21 04:37:26 CEST 2015
rk3036 mmc driver is similar to dw_mmc, but use external dma,
this patch implment fifo mode, need to do dma mode in future.
Signed-off-by: Lin Huang <hl at rock-chips.com>
---
Changes in v1:
- clean copyright announcement
drivers/mmc/Kconfig | 9 +
drivers/mmc/Makefile | 1 +
drivers/mmc/rockchip_3036_dw_mmc.c | 479 +++++++++++++++++++++++++++++++++++++
3 files changed, 489 insertions(+)
create mode 100644 drivers/mmc/rockchip_3036_dw_mmc.c
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 6277f92..38bfb9c 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -19,6 +19,15 @@ config ROCKCHIP_DWMMC
SD 3.0, SDIO 3.0 and MMC 4.5 and supports common eMMC chips as well
as removeable SD and micro-SD cards.
+config ROCKCHIP_3036_DWMMC
+ bool "Rockchip 3036 SD/MMC controller support"
+ depends on DM_MMC && OF_CONTROL
+ help
+ This enables support for the Rockchip 3036 SD/MMM controller, which is
+ based on Designware IP. The device is compatible with at least
+ SD 3.0, SDIO 3.0 and MMC 4.5 and supports common eMMC chips as well
+ as removeable SD and micro-SD cards.
+
config SH_SDHI
bool "SuperH/Renesas ARM SoCs on-chip SDHI host controller support"
depends on RMOBILE
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 99d0295..ff3920a 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -30,6 +30,7 @@ obj-$(CONFIG_OMAP_HSMMC) += omap_hsmmc.o
obj-$(CONFIG_X86) += pci_mmc.o
obj-$(CONFIG_PXA_MMC_GENERIC) += pxa_mmc_gen.o
obj-$(CONFIG_ROCKCHIP_DWMMC) += rockchip_dw_mmc.o
+obj-$(CONFIG_ROCKCHIP_3036_DWMMC) += rockchip_3036_dw_mmc.o
obj-$(CONFIG_SUPPORT_EMMC_RPMB) += rpmb.o
obj-$(CONFIG_S3C_SDI) += s3c_sdi.o
obj-$(CONFIG_S5P_SDHCI) += s5p_sdhci.o
diff --git a/drivers/mmc/rockchip_3036_dw_mmc.c b/drivers/mmc/rockchip_3036_dw_mmc.c
new file mode 100644
index 0000000..2a2df52
--- /dev/null
+++ b/drivers/mmc/rockchip_3036_dw_mmc.c
@@ -0,0 +1,479 @@
+/*
+ * (C) Copyright 2015 Rockchip Electronics Co., Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk.h>
+#include <dm.h>
+#include <dwmmc.h>
+#include <errno.h>
+#include <syscon.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/periph.h>
+#include <linux/err.h>
+#include <bouncebuf.h>
+#include <common.h>
+#include <errno.h>
+#include <malloc.h>
+#include <memalign.h>
+#include <mmc.h>
+#include <dwmmc.h>
+#include <asm-generic/errno.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define PAGE_SIZE 4096
+#define MMC_GET_FCNT(x) (((x)>>17) & 0x1FF)
+
+struct rockchip_dwmmc_priv {
+ struct udevice *clk;
+ struct dwmci_host host;
+};
+
+static int dwmci_wait_reset(struct dwmci_host *host, u32 value)
+{
+ unsigned long timeout = 1000;
+ u32 ctrl;
+
+ dwmci_writel(host, DWMCI_CTRL, value);
+
+ while (timeout--) {
+ ctrl = dwmci_readl(host, DWMCI_CTRL);
+ if (!(ctrl & DWMCI_RESET_ALL))
+ return 1;
+ }
+ return 0;
+}
+
+static int dwmci_set_transfer_mode(struct dwmci_host *host,
+ struct mmc_data *data)
+{
+ unsigned long mode;
+
+ mode = DWMCI_CMD_DATA_EXP;
+ if (data->flags & MMC_DATA_WRITE)
+ mode |= DWMCI_CMD_RW;
+
+ return mode;
+}
+
+static int dwmci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
+ struct mmc_data *data)
+{
+ struct dwmci_host *host = mmc->priv;
+ int ret = 0, flags = 0, i;
+ unsigned int timeout = 100000;
+ u32 retry = 10000;
+ u32 mask;
+ ulong start = get_timer(0);
+ int size;
+ unsigned int fifo_len;
+ unsigned int *buf = 0;
+
+ while (dwmci_readl(host, DWMCI_STATUS) & DWMCI_BUSY) {
+ if (get_timer(start) > timeout) {
+ debug("%s: Timeout on data busy\n", __func__);
+ return TIMEOUT;
+ }
+ }
+
+ dwmci_writel(host, DWMCI_RINTSTS, DWMCI_INTMSK_ALL);
+
+ if (data) {
+ /*
+ * TODO: rk3036 use external DMA,
+ * need to support DMA mode in future
+ */
+ if (data->flags == MMC_DATA_READ)
+ buf = (unsigned int *)data->dest;
+ else
+ buf = (unsigned int *)data->src;
+ dwmci_writel(host, DWMCI_BLKSIZ, data->blocksize);
+ dwmci_writel(host, DWMCI_BYTCNT, data->blocksize * data->blocks);
+ dwmci_wait_reset(host, DWMCI_CTRL_FIFO_RESET);
+ }
+
+ dwmci_writel(host, DWMCI_CMDARG, cmd->cmdarg);
+
+ if (data)
+ flags = dwmci_set_transfer_mode(host, data);
+
+ if ((cmd->resp_type & MMC_RSP_136) && (cmd->resp_type & MMC_RSP_BUSY))
+ return -1;
+
+ if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
+ flags |= DWMCI_CMD_ABORT_STOP;
+ else
+ flags |= DWMCI_CMD_PRV_DAT_WAIT;
+
+ if (cmd->resp_type & MMC_RSP_PRESENT) {
+ flags |= DWMCI_CMD_RESP_EXP;
+ if (cmd->resp_type & MMC_RSP_136)
+ flags |= DWMCI_CMD_RESP_LENGTH;
+ }
+
+ if (cmd->resp_type & MMC_RSP_CRC)
+ flags |= DWMCI_CMD_CHECK_CRC;
+
+ flags |= (cmd->cmdidx | DWMCI_CMD_START | DWMCI_CMD_USE_HOLD_REG);
+
+ debug("Sending CMD%d\n", cmd->cmdidx);
+
+ dwmci_writel(host, DWMCI_CMD, flags);
+
+ for (i = 0; i < retry; i++) {
+ mask = dwmci_readl(host, DWMCI_RINTSTS);
+ if (mask & DWMCI_INTMSK_CDONE) {
+ if (!data)
+ dwmci_writel(host, DWMCI_RINTSTS, mask);
+ break;
+ }
+ }
+
+ if (i == retry) {
+ debug("%s: Timeout.\n", __func__);
+ return TIMEOUT;
+ }
+
+ if (mask & DWMCI_INTMSK_RTO) {
+ /*
+ * Timeout here is not necessarily fatal. (e)MMC cards
+ * will splat here when they receive CMD55 as they do
+ * not support this command and that is exactly the way
+ * to tell them apart from SD cards. Thus, this output
+ * below shall be debug(). eMMC cards also do not favor
+ * CMD8, please keep that in mind.
+ */
+ debug("%s: Response Timeout.\n", __func__);
+ return TIMEOUT;
+ } else if (mask & DWMCI_INTMSK_RE) {
+ debug("%s: Response Error.\n", __func__);
+ return -EIO;
+ }
+
+ if (cmd->resp_type & MMC_RSP_PRESENT) {
+ if (cmd->resp_type & MMC_RSP_136) {
+ cmd->response[0] = dwmci_readl(host, DWMCI_RESP3);
+ cmd->response[1] = dwmci_readl(host, DWMCI_RESP2);
+ cmd->response[2] = dwmci_readl(host, DWMCI_RESP1);
+ cmd->response[3] = dwmci_readl(host, DWMCI_RESP0);
+ } else {
+ cmd->response[0] = dwmci_readl(host, DWMCI_RESP0);
+ }
+ }
+
+ if (data) {
+ size = data->blocksize * data->blocks / 4;
+ start = get_timer(0);
+ timeout = 1000;
+ for (;;) {
+ mask = dwmci_readl(host, DWMCI_RINTSTS);
+ /* Error during data transfer. */
+ if (mask & (DWMCI_DATA_ERR | DWMCI_DATA_TOUT)) {
+ debug("%s: DATA ERROR!\n", __func__);
+ ret = -EINVAL;
+ break;
+ }
+
+ /*
+ * TODO: rk3036 use external DMA,
+ * need to support DMA mode in future
+ */
+ if (data->flags == MMC_DATA_READ) {
+ if ((dwmci_readl(host, DWMCI_RINTSTS) &&
+ DWMCI_INTMSK_RXDR) && size) {
+ fifo_len = dwmci_readl(host,
+ DWMCI_STATUS);
+ fifo_len = MMC_GET_FCNT(fifo_len);
+ for (i = 0; i < fifo_len; i++)
+ *buf++ = dwmci_readl(host,
+ DWMCI_DATA);
+ dwmci_writel(host, DWMCI_RINTSTS,
+ DWMCI_INTMSK_RXDR);
+ size = size > fifo_len ?
+ (size - fifo_len) : 0;
+ }
+ } else {
+ if ((dwmci_readl(host, DWMCI_RINTSTS) &&
+ DWMCI_INTMSK_TXDR) && size) {
+ fifo_len = dwmci_readl(host,
+ DWMCI_STATUS);
+ fifo_len = MMC_GET_FCNT(fifo_len);
+ for (i = 0; i < fifo_len; i++)
+ dwmci_writel(host, DWMCI_DATA,
+ *buf++);
+ dwmci_writel(host, DWMCI_RINTSTS,
+ DWMCI_INTMSK_TXDR);
+ size = size > fifo_len ?
+ (size - fifo_len) : 0;
+ }
+ }
+
+ /* Data arrived correctly. */
+ if (mask & DWMCI_INTMSK_DTO) {
+ ret = 0;
+ break;
+ }
+
+ /* Check for timeout. */
+ if (get_timer(start) > timeout) {
+ debug("%s: Timeout waiting for data!\n",
+ __func__);
+ ret = TIMEOUT;
+ break;
+ }
+ }
+ dwmci_writel(host, DWMCI_RINTSTS, mask);
+ }
+
+ udelay(100);
+
+ return ret;
+}
+
+static int dwmci_setup_bus(struct dwmci_host *host, u32 freq)
+{
+ u32 div, status;
+ int timeout = 10000;
+ unsigned long sclk;
+
+ if ((freq == host->clock) || (freq == 0))
+ return 0;
+ /*
+ * If host->get_mmc_clk isn't defined,
+ * then assume that host->bus_hz is source clock value.
+ * host->bus_hz should be set by user.
+ */
+ if (host->get_mmc_clk)
+ sclk = host->get_mmc_clk(host, freq);
+ else if (host->bus_hz)
+ sclk = host->bus_hz;
+ else {
+ debug("%s: Didn't get source clock value.\n", __func__);
+ return -EINVAL;
+ }
+
+ if (sclk == freq)
+ div = 0; /* bypass mode */
+ else
+ div = DIV_ROUND_UP(sclk, 2 * freq);
+
+ dwmci_writel(host, DWMCI_CLKENA, 0);
+ dwmci_writel(host, DWMCI_CLKSRC, 0);
+
+ dwmci_writel(host, DWMCI_CLKDIV, div);
+ dwmci_writel(host, DWMCI_CMD, DWMCI_CMD_PRV_DAT_WAIT |
+ DWMCI_CMD_UPD_CLK | DWMCI_CMD_START);
+
+ do {
+ status = dwmci_readl(host, DWMCI_CMD);
+ if (timeout-- < 0) {
+ debug("%s: Timeout!\n", __func__);
+ return -ETIMEDOUT;
+ }
+ } while (status & DWMCI_CMD_START);
+
+ dwmci_writel(host, DWMCI_CLKENA, DWMCI_CLKEN_ENABLE |
+ DWMCI_CLKEN_LOW_PWR);
+
+ dwmci_writel(host, DWMCI_CMD, DWMCI_CMD_PRV_DAT_WAIT |
+ DWMCI_CMD_UPD_CLK | DWMCI_CMD_START);
+
+ timeout = 10000;
+ do {
+ status = dwmci_readl(host, DWMCI_CMD);
+ if (timeout-- < 0) {
+ debug("%s: Timeout!\n", __func__);
+ return -ETIMEDOUT;
+ }
+ } while (status & DWMCI_CMD_START);
+
+ host->clock = freq;
+
+ return 0;
+}
+
+static void dwmci_set_ios(struct mmc *mmc)
+{
+ struct dwmci_host *host = (struct dwmci_host *)mmc->priv;
+ u32 ctype, regs;
+
+ debug("Buswidth = %d, clock: %d\n", mmc->bus_width, mmc->clock);
+
+ dwmci_setup_bus(host, mmc->clock);
+ switch (mmc->bus_width) {
+ case 8:
+ ctype = DWMCI_CTYPE_8BIT;
+ break;
+ case 4:
+ ctype = DWMCI_CTYPE_4BIT;
+ break;
+ default:
+ ctype = DWMCI_CTYPE_1BIT;
+ break;
+ }
+
+ dwmci_writel(host, DWMCI_CTYPE, ctype);
+
+ regs = dwmci_readl(host, DWMCI_UHS_REG);
+ if (mmc->ddr_mode)
+ regs |= DWMCI_DDR_MODE;
+ else
+ regs &= ~DWMCI_DDR_MODE;
+
+ dwmci_writel(host, DWMCI_UHS_REG, regs);
+
+ if (host->clksel)
+ host->clksel(host);
+}
+
+static int dwmci_init(struct mmc *mmc)
+{
+ struct dwmci_host *host = mmc->priv;
+
+ if (host->board_init)
+ host->board_init(host);
+
+ dwmci_writel(host, DWMCI_PWREN, 1);
+
+ if (!dwmci_wait_reset(host, DWMCI_RESET_ALL)) {
+ debug("%s[%d] Fail-reset!!\n", __func__, __LINE__);
+ return -EIO;
+ }
+
+ /* Enumerate at 400KHz */
+ dwmci_setup_bus(host, mmc->cfg->f_min);
+
+ dwmci_writel(host, DWMCI_RINTSTS, 0xFFFFFFFF);
+ dwmci_writel(host, DWMCI_INTMASK, 0);
+
+ dwmci_writel(host, DWMCI_TMOUT, 0xFFFFFFFF);
+
+ dwmci_writel(host, DWMCI_IDINTEN, 0);
+ dwmci_writel(host, DWMCI_BMOD, 1);
+
+ if (!host->fifoth_val) {
+ uint32_t fifo_size;
+ fifo_size = dwmci_readl(host, DWMCI_FIFOTH);
+ fifo_size = ((fifo_size & RX_WMARK_MASK) >> RX_WMARK_SHIFT) + 1;
+ host->fifoth_val = MSIZE(0x2) | RX_WMARK(fifo_size / 2 - 1) |
+ TX_WMARK(fifo_size / 2);
+ }
+ dwmci_writel(host, DWMCI_FIFOTH, host->fifoth_val);
+
+ dwmci_writel(host, DWMCI_CLKENA, 0);
+ dwmci_writel(host, DWMCI_CLKSRC, 0);
+
+ return 0;
+}
+
+static const struct mmc_ops dwmci_ops = {
+ .send_cmd = dwmci_send_cmd,
+ .set_ios = dwmci_set_ios,
+ .init = dwmci_init,
+};
+
+int add_dwmci(struct dwmci_host *host, u32 max_clk, u32 min_clk)
+{
+ host->cfg.name = host->name;
+ host->cfg.ops = &dwmci_ops;
+ host->cfg.f_min = min_clk;
+ host->cfg.f_max = max_clk;
+
+ host->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
+
+ host->cfg.host_caps = host->caps;
+
+ if (host->buswidth == 8) {
+ host->cfg.host_caps |= MMC_MODE_8BIT;
+ host->cfg.host_caps &= ~MMC_MODE_4BIT;
+ } else {
+ host->cfg.host_caps |= MMC_MODE_4BIT;
+ host->cfg.host_caps &= ~MMC_MODE_8BIT;
+ }
+ host->cfg.host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz;
+
+ host->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
+
+ host->mmc = mmc_create(&host->cfg, host);
+ if (host->mmc == NULL)
+ return -1;
+
+ return 0;
+}
+
+static uint rockchip_dwmmc_get_mmc_clk(struct dwmci_host *host, uint freq)
+{
+ struct udevice *dev = host->priv;
+ struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ ret = clk_set_periph_rate(priv->clk, PERIPH_ID_SDMMC0 + host->dev_index,
+ freq);
+ if (ret < 0) {
+ debug("%s: err=%d\n", __func__, ret);
+ return ret;
+ }
+
+ return freq;
+}
+
+static int rockchip_dwmmc_ofdata_to_platdata(struct udevice *dev)
+{
+ struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
+ struct dwmci_host *host = &priv->host;
+
+ host->name = dev->name;
+ host->ioaddr = (void *)dev_get_addr(dev);
+ host->buswidth = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
+ "bus-width", 4);
+ host->get_mmc_clk = rockchip_dwmmc_get_mmc_clk;
+ host->priv = dev;
+
+ /* use non-removeable as sdcard and emmc as judgement */
+ if (fdtdec_lookup_phandle(gd->fdt_blob, dev->of_offset, "non-removable")
+ == -FDT_ERR_NOTFOUND)
+ host->dev_index = (ulong)host->ioaddr == 1;
+
+ return 0;
+}
+
+static int rockchip_dwmmc_probe(struct udevice *dev)
+{
+ struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+ struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
+ struct dwmci_host *host = &priv->host;
+ u32 minmax[2];
+ int ret;
+
+ ret = uclass_get_device(UCLASS_CLK, CLK_GENERAL, &priv->clk);
+ if (ret)
+ return ret;
+
+ ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset,
+ "clock-freq-min-max", minmax, 2);
+ if (!ret)
+ ret = add_dwmci(host, minmax[1], minmax[0]);
+ if (ret)
+ return ret;
+
+ upriv->mmc = host->mmc;
+
+ return 0;
+}
+
+static const struct udevice_id rockchip_dwmmc_ids[] = {
+ { .compatible = "rockchip,rk3288-dw-mshc" },
+ { }
+};
+
+U_BOOT_DRIVER(rockchip_dwmmc_drv) = {
+ .name = "rockchip_3036_dwmmc",
+ .id = UCLASS_MMC,
+ .of_match = rockchip_dwmmc_ids,
+ .ofdata_to_platdata = rockchip_dwmmc_ofdata_to_platdata,
+ .probe = rockchip_dwmmc_probe,
+ .priv_auto_alloc_size = sizeof(struct rockchip_dwmmc_priv),
+};
--
1.9.1
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