/*
* Freescale i.MX28 SSP MMC driver
*
+ * Copyright (C) 2019 DENX Software Engineering
+ * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
+ *
* Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
* on behalf of DENX Software Engineering GmbH
*
* (C) Copyright 2003
* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
*/
+
#include <common.h>
#include <malloc.h>
#include <mmc.h>
#include <asm/mach-imx/dma.h>
#include <bouncebuf.h>
+#define MXSMMC_MAX_TIMEOUT 10000
+#define MXSMMC_SMALL_TRANSFER 512
+
+#if !CONFIG_IS_ENABLED(DM_MMC)
struct mxsmmc_priv {
int id;
- struct mxs_ssp_regs *regs;
- uint32_t buswidth;
int (*mmc_is_wp)(int);
int (*mmc_cd)(int);
- struct mxs_dma_desc *desc;
struct mmc_config cfg; /* mmc configuration */
+ struct mxs_dma_desc *desc;
+ uint32_t buswidth;
+ struct mxs_ssp_regs *regs;
};
+#else /* CONFIG_IS_ENABLED(DM_MMC) */
+#include <dm/device.h>
+#include <dm/read.h>
+#include <dt-structs.h>
+
+#ifdef CONFIG_MX28
+#define dtd_fsl_imx_mmc dtd_fsl_imx28_mmc
+#else /* CONFIG_MX23 */
+#define dtd_fsl_imx_mmc dtd_fsl_imx23_mmc
+#endif
-#define MXSMMC_MAX_TIMEOUT 10000
-#define MXSMMC_SMALL_TRANSFER 512
+struct mxsmmc_platdata {
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+ struct dtd_fsl_imx_mmc dtplat;
+#endif
+ struct mmc_config cfg;
+ struct mmc mmc;
+ fdt_addr_t base;
+ int non_removable;
+ int buswidth;
+ int dma_id;
+ int clk_id;
+};
+
+struct mxsmmc_priv {
+ int clkid;
+ struct mxs_dma_desc *desc;
+ u32 buswidth;
+ struct mxs_ssp_regs *regs;
+ unsigned int dma_channel;
+};
+#endif
+
+#if !CONFIG_IS_ENABLED(DM_MMC)
+static int mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
+ struct mmc_data *data);
static int mxsmmc_cd(struct mxsmmc_priv *priv)
{
return !(readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT);
}
+static int mxsmmc_set_ios(struct mmc *mmc)
+{
+ struct mxsmmc_priv *priv = mmc->priv;
+ struct mxs_ssp_regs *ssp_regs = priv->regs;
+
+ /* Set the clock speed */
+ if (mmc->clock)
+ mxs_set_ssp_busclock(priv->id, mmc->clock / 1000);
+
+ switch (mmc->bus_width) {
+ case 1:
+ priv->buswidth = SSP_CTRL0_BUS_WIDTH_ONE_BIT;
+ break;
+ case 4:
+ priv->buswidth = SSP_CTRL0_BUS_WIDTH_FOUR_BIT;
+ break;
+ case 8:
+ priv->buswidth = SSP_CTRL0_BUS_WIDTH_EIGHT_BIT;
+ break;
+ }
+
+ /* Set the bus width */
+ clrsetbits_le32(&ssp_regs->hw_ssp_ctrl0,
+ SSP_CTRL0_BUS_WIDTH_MASK, priv->buswidth);
+
+ debug("MMC%d: Set %d bits bus width\n",
+ mmc->block_dev.devnum, mmc->bus_width);
+
+ return 0;
+}
+
+static int mxsmmc_init(struct mmc *mmc)
+{
+ struct mxsmmc_priv *priv = mmc->priv;
+ struct mxs_ssp_regs *ssp_regs = priv->regs;
+
+ /* Reset SSP */
+ mxs_reset_block(&ssp_regs->hw_ssp_ctrl0_reg);
+
+ /* Reconfigure the SSP block for MMC operation */
+ writel(SSP_CTRL1_SSP_MODE_SD_MMC |
+ SSP_CTRL1_WORD_LENGTH_EIGHT_BITS |
+ SSP_CTRL1_DMA_ENABLE |
+ SSP_CTRL1_POLARITY |
+ SSP_CTRL1_RECV_TIMEOUT_IRQ_EN |
+ SSP_CTRL1_DATA_CRC_IRQ_EN |
+ SSP_CTRL1_DATA_TIMEOUT_IRQ_EN |
+ SSP_CTRL1_RESP_TIMEOUT_IRQ_EN |
+ SSP_CTRL1_RESP_ERR_IRQ_EN,
+ &ssp_regs->hw_ssp_ctrl1_set);
+
+ /* Set initial bit clock 400 KHz */
+ mxs_set_ssp_busclock(priv->id, 400);
+
+ /* Send initial 74 clock cycles (185 us @ 400 KHz)*/
+ writel(SSP_CMD0_CONT_CLKING_EN, &ssp_regs->hw_ssp_cmd0_set);
+ udelay(200);
+ writel(SSP_CMD0_CONT_CLKING_EN, &ssp_regs->hw_ssp_cmd0_clr);
+
+ return 0;
+}
+
+static const struct mmc_ops mxsmmc_ops = {
+ .send_cmd = mxsmmc_send_cmd,
+ .set_ios = mxsmmc_set_ios,
+ .init = mxsmmc_init,
+};
+
+int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int), int (*cd)(int))
+{
+ struct mmc *mmc = NULL;
+ struct mxsmmc_priv *priv = NULL;
+ int ret;
+ const unsigned int mxsmmc_clk_id = mxs_ssp_clock_by_bus(id);
+
+ if (!mxs_ssp_bus_id_valid(id))
+ return -ENODEV;
+
+ priv = malloc(sizeof(struct mxsmmc_priv));
+ if (!priv)
+ return -ENOMEM;
+
+ priv->desc = mxs_dma_desc_alloc();
+ if (!priv->desc) {
+ free(priv);
+ return -ENOMEM;
+ }
+
+ ret = mxs_dma_init_channel(MXS_DMA_CHANNEL_AHB_APBH_SSP0 + id);
+ if (ret)
+ return ret;
+
+ priv->mmc_is_wp = wp;
+ priv->mmc_cd = cd;
+ priv->id = id;
+ priv->regs = mxs_ssp_regs_by_bus(id);
+
+ priv->cfg.name = "MXS MMC";
+ priv->cfg.ops = &mxsmmc_ops;
+
+ priv->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
+
+ priv->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT |
+ MMC_MODE_HS_52MHz | MMC_MODE_HS;
+
+ /*
+ * SSPCLK = 480 * 18 / 29 / 1 = 297.731 MHz
+ * SSP bit rate = SSPCLK / (CLOCK_DIVIDE * (1 + CLOCK_RATE)),
+ * CLOCK_DIVIDE has to be an even value from 2 to 254, and
+ * CLOCK_RATE could be any integer from 0 to 255.
+ */
+ priv->cfg.f_min = 400000;
+ priv->cfg.f_max = mxc_get_clock(MXC_SSP0_CLK + mxsmmc_clk_id)
+ * 1000 / 2;
+ priv->cfg.b_max = 0x20;
+
+ mmc = mmc_create(&priv->cfg, priv);
+ if (!mmc) {
+ mxs_dma_desc_free(priv->desc);
+ free(priv);
+ return -ENOMEM;
+ }
+ return 0;
+}
+#endif /* CONFIG_IS_ENABLED(DM_MMC) */
+
static int mxsmmc_send_cmd_pio(struct mxsmmc_priv *priv, struct mmc_data *data)
{
struct mxs_ssp_regs *ssp_regs = priv->regs;
priv->desc->cmd.data |= MXS_DMA_DESC_IRQ | MXS_DMA_DESC_DEC_SEM |
(data_count << MXS_DMA_DESC_BYTES_OFFSET);
+#if !CONFIG_IS_ENABLED(DM_MMC)
dmach = MXS_DMA_CHANNEL_AHB_APBH_SSP0 + priv->id;
+#else
+ dmach = priv->dma_channel;
+#endif
mxs_dma_desc_append(dmach, priv->desc);
if (mxs_dma_go(dmach)) {
bounce_buffer_stop(&bbstate);
return 0;
}
+#if !CONFIG_IS_ENABLED(DM_MMC)
/*
* Sends a command out on the bus. Takes the mmc pointer,
* a command pointer, and an optional data pointer.
{
struct mxsmmc_priv *priv = mmc->priv;
struct mxs_ssp_regs *ssp_regs = priv->regs;
+#else
+static int
+mxsmmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd, struct mmc_data *data)
+{
+ struct mxsmmc_platdata *plat = dev_get_platdata(dev);
+ struct mxsmmc_priv *priv = dev_get_priv(dev);
+ struct mxs_ssp_regs *ssp_regs = priv->regs;
+ struct mmc *mmc = &plat->mmc;
+#endif
uint32_t reg;
int timeout;
uint32_t ctrl0;
int ret;
-
- debug("MMC%d: CMD%d\n", mmc->block_dev.devnum, cmd->cmdidx);
+#if !CONFIG_IS_ENABLED(DM_MMC)
+ int devnum = mmc->block_dev.devnum;
+#else
+ int devnum = mmc_get_blk_desc(mmc)->devnum;
+#endif
+ debug("MMC%d: CMD%d\n", devnum, cmd->cmdidx);
/* Check bus busy */
timeout = MXSMMC_MAX_TIMEOUT;
}
if (!timeout) {
- printf("MMC%d: Bus busy timeout!\n", mmc->block_dev.devnum);
+ printf("MMC%d: Bus busy timeout!\n", devnum);
return -ETIMEDOUT;
}
-
+#if !CONFIG_IS_ENABLED(DM_MMC)
/* See if card is present */
if (!mxsmmc_cd(priv)) {
- printf("MMC%d: No card detected!\n", mmc->block_dev.devnum);
+ printf("MMC%d: No card detected!\n", devnum);
return -ENOMEDIUM;
}
-
+#endif
/* Start building CTRL0 contents */
ctrl0 = priv->buswidth;
/* READ or WRITE */
if (data->flags & MMC_DATA_READ) {
ctrl0 |= SSP_CTRL0_READ;
+#if !CONFIG_IS_ENABLED(DM_MMC)
} else if (priv->mmc_is_wp &&
- priv->mmc_is_wp(mmc->block_dev.devnum)) {
- printf("MMC%d: Can not write a locked card!\n",
- mmc->block_dev.devnum);
+ priv->mmc_is_wp(devnum)) {
+ printf("MMC%d: Can not write a locked card!\n", devnum);
return -EOPNOTSUPP;
+#endif
}
-
ctrl0 |= SSP_CTRL0_DATA_XFER;
reg = data->blocksize * data->blocks;
}
if (!timeout) {
- printf("MMC%d: Command %d busy\n",
- mmc->block_dev.devnum, cmd->cmdidx);
+ printf("MMC%d: Command %d busy\n", devnum, cmd->cmdidx);
return -ETIMEDOUT;
}
/* Check command timeout */
if (reg & SSP_STATUS_RESP_TIMEOUT) {
printf("MMC%d: Command %d timeout (status 0x%08x)\n",
- mmc->block_dev.devnum, cmd->cmdidx, reg);
+ devnum, cmd->cmdidx, reg);
return -ETIMEDOUT;
}
/* Check command errors */
if (reg & (SSP_STATUS_RESP_CRC_ERR | SSP_STATUS_RESP_ERR)) {
printf("MMC%d: Command %d error (status 0x%08x)!\n",
- mmc->block_dev.devnum, cmd->cmdidx, reg);
+ devnum, cmd->cmdidx, reg);
return -ECOMM;
}
ret = mxsmmc_send_cmd_pio(priv, data);
if (ret) {
printf("MMC%d: Data timeout with command %d "
- "(status 0x%08x)!\n",
- mmc->block_dev.devnum, cmd->cmdidx, reg);
+ "(status 0x%08x)!\n", devnum, cmd->cmdidx, reg);
return ret;
}
} else {
ret = mxsmmc_send_cmd_dma(priv, data);
if (ret) {
- printf("MMC%d: DMA transfer failed\n",
- mmc->block_dev.devnum);
+ printf("MMC%d: DMA transfer failed\n", devnum);
return ret;
}
}
(SSP_STATUS_TIMEOUT | SSP_STATUS_DATA_CRC_ERR |
SSP_STATUS_FIFO_OVRFLW | SSP_STATUS_FIFO_UNDRFLW)) {
printf("MMC%d: Data error with command %d (status 0x%08x)!\n",
- mmc->block_dev.devnum, cmd->cmdidx, reg);
+ devnum, cmd->cmdidx, reg);
return -ECOMM;
}
return 0;
}
-static int mxsmmc_set_ios(struct mmc *mmc)
+#if CONFIG_IS_ENABLED(DM_MMC)
+/* Base numbers of i.MX2[38] clk for ssp0 IP block */
+#define MXS_SSP_IMX23_CLKID_SSP0 33
+#define MXS_SSP_IMX28_CLKID_SSP0 46
+
+static int mxsmmc_get_cd(struct udevice *dev)
{
- struct mxsmmc_priv *priv = mmc->priv;
+ struct mxsmmc_platdata *plat = dev_get_platdata(dev);
+ struct mxsmmc_priv *priv = dev_get_priv(dev);
+ struct mxs_ssp_regs *ssp_regs = priv->regs;
+
+ if (plat->non_removable)
+ return 1;
+
+ return !(readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT);
+}
+
+static int mxsmmc_set_ios(struct udevice *dev)
+{
+ struct mxsmmc_platdata *plat = dev_get_platdata(dev);
+ struct mxsmmc_priv *priv = dev_get_priv(dev);
struct mxs_ssp_regs *ssp_regs = priv->regs;
+ struct mmc *mmc = &plat->mmc;
/* Set the clock speed */
if (mmc->clock)
- mxs_set_ssp_busclock(priv->id, mmc->clock / 1000);
+ mxs_set_ssp_busclock(priv->clkid, mmc->clock / 1000);
switch (mmc->bus_width) {
case 1:
clrsetbits_le32(&ssp_regs->hw_ssp_ctrl0,
SSP_CTRL0_BUS_WIDTH_MASK, priv->buswidth);
- debug("MMC%d: Set %d bits bus width\n",
- mmc->block_dev.devnum, mmc->bus_width);
+ debug("MMC%d: Set %d bits bus width\n", mmc_get_blk_desc(mmc)->devnum,
+ mmc->bus_width);
return 0;
}
-static int mxsmmc_init(struct mmc *mmc)
+static int mxsmmc_init(struct udevice *dev)
{
- struct mxsmmc_priv *priv = mmc->priv;
+ struct mxsmmc_priv *priv = dev_get_priv(dev);
struct mxs_ssp_regs *ssp_regs = priv->regs;
/* Reset SSP */
&ssp_regs->hw_ssp_ctrl1_set);
/* Set initial bit clock 400 KHz */
- mxs_set_ssp_busclock(priv->id, 400);
+ mxs_set_ssp_busclock(priv->clkid, 400);
/* Send initial 74 clock cycles (185 us @ 400 KHz)*/
writel(SSP_CMD0_CONT_CLKING_EN, &ssp_regs->hw_ssp_cmd0_set);
return 0;
}
-static const struct mmc_ops mxsmmc_ops = {
- .send_cmd = mxsmmc_send_cmd,
- .set_ios = mxsmmc_set_ios,
- .init = mxsmmc_init,
-};
-
-int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int), int (*cd)(int))
+static int mxsmmc_probe(struct udevice *dev)
{
- struct mmc *mmc = NULL;
- struct mxsmmc_priv *priv = NULL;
- int ret;
- const unsigned int mxsmmc_clk_id = mxs_ssp_clock_by_bus(id);
-
- if (!mxs_ssp_bus_id_valid(id))
- return -ENODEV;
+ struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+ struct mxsmmc_platdata *plat = dev_get_platdata(dev);
+ struct mxsmmc_priv *priv = dev_get_priv(dev);
+ struct blk_desc *bdesc;
+ struct mmc *mmc;
+ int ret, clkid;
+
+ debug("%s: probe\n", __func__);
+
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+ struct dtd_fsl_imx_mmc *dtplat = &plat->dtplat;
+ struct phandle_1_arg *p1a = &dtplat->clocks[0];
+
+ priv->buswidth = dtplat->bus_width;
+ priv->regs = (struct mxs_ssp_regs *)dtplat->reg[0];
+ priv->dma_channel = dtplat->dmas[1];
+ clkid = p1a->arg[0];
+ plat->non_removable = dtplat->non_removable;
+
+ debug("OF_PLATDATA: regs: 0x%p bw: %d clkid: %d non_removable: %d\n",
+ priv->regs, priv->buswidth, clkid, plat->non_removable);
+#else
+ priv->regs = (struct mxs_ssp_regs *)plat->base;
+ priv->dma_channel = plat->dma_id;
+ clkid = plat->clk_id;
+#endif
- priv = malloc(sizeof(struct mxsmmc_priv));
- if (!priv)
- return -ENOMEM;
+#ifdef CONFIG_MX28
+ priv->clkid = clkid - MXS_SSP_IMX28_CLKID_SSP0;
+#else /* CONFIG_MX23 */
+ priv->clkid = clkid - MXS_SSP_IMX23_CLKID_SSP0;
+#endif
+ mmc = &plat->mmc;
+ mmc->cfg = &plat->cfg;
+ mmc->dev = dev;
priv->desc = mxs_dma_desc_alloc();
if (!priv->desc) {
- free(priv);
+ printf("%s: Cannot allocate DMA descriptor\n", __func__);
return -ENOMEM;
}
- ret = mxs_dma_init_channel(MXS_DMA_CHANNEL_AHB_APBH_SSP0 + id);
+ ret = mxs_dma_init_channel(priv->dma_channel);
if (ret)
return ret;
- priv->mmc_is_wp = wp;
- priv->mmc_cd = cd;
- priv->id = id;
- priv->regs = mxs_ssp_regs_by_bus(id);
-
- priv->cfg.name = "MXS MMC";
- priv->cfg.ops = &mxsmmc_ops;
+ plat->cfg.name = "MXS MMC";
+ plat->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
- priv->cfg.voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
-
- priv->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT |
- MMC_MODE_HS_52MHz | MMC_MODE_HS;
+ plat->cfg.host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT |
+ MMC_MODE_HS_52MHz | MMC_MODE_HS;
/*
* SSPCLK = 480 * 18 / 29 / 1 = 297.731 MHz
* CLOCK_DIVIDE has to be an even value from 2 to 254, and
* CLOCK_RATE could be any integer from 0 to 255.
*/
- priv->cfg.f_min = 400000;
- priv->cfg.f_max = mxc_get_clock(MXC_SSP0_CLK + mxsmmc_clk_id) * 1000 / 2;
- priv->cfg.b_max = 0x20;
+ plat->cfg.f_min = 400000;
+ plat->cfg.f_max = mxc_get_clock(MXC_SSP0_CLK + priv->clkid) * 1000 / 2;
+ plat->cfg.b_max = 0x20;
- mmc = mmc_create(&priv->cfg, priv);
- if (mmc == NULL) {
- mxs_dma_desc_free(priv->desc);
- free(priv);
- return -ENOMEM;
+ bdesc = mmc_get_blk_desc(mmc);
+ if (!bdesc) {
+ printf("%s: No block device descriptor!\n", __func__);
+ return -ENODEV;
+ }
+
+ if (plat->non_removable)
+ bdesc->removable = 0;
+
+ ret = mxsmmc_init(dev);
+ if (ret)
+ printf("%s: MMC%d init error %d\n", __func__,
+ bdesc->devnum, ret);
+
+ /* Set the initial clock speed */
+ mmc_set_clock(mmc, 400000, MMC_CLK_ENABLE);
+
+ upriv->mmc = mmc;
+
+ return 0;
+};
+
+#if CONFIG_IS_ENABLED(BLK)
+static int mxsmmc_bind(struct udevice *dev)
+{
+ struct mxsmmc_platdata *plat = dev_get_platdata(dev);
+
+ return mmc_bind(dev, &plat->mmc, &plat->cfg);
+}
+#endif
+
+static const struct dm_mmc_ops mxsmmc_ops = {
+ .get_cd = mxsmmc_get_cd,
+ .send_cmd = mxsmmc_send_cmd,
+ .set_ios = mxsmmc_set_ios,
+};
+
+#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
+static int mxsmmc_ofdata_to_platdata(struct udevice *bus)
+{
+ struct mxsmmc_platdata *plat = bus->platdata;
+ u32 prop[2];
+ int ret;
+
+ plat->base = dev_read_addr(bus);
+ plat->buswidth =
+ dev_read_u32_default(bus, "bus-width", 1);
+ plat->non_removable = dev_read_bool(bus, "non-removable");
+
+ ret = dev_read_u32_array(bus, "dmas", prop, ARRAY_SIZE(prop));
+ if (ret) {
+ printf("%s: Reading 'dmas' property failed!\n", __func__);
+ return ret;
+ }
+ plat->dma_id = prop[1];
+
+ ret = dev_read_u32_array(bus, "clocks", prop, ARRAY_SIZE(prop));
+ if (ret) {
+ printf("%s: Reading 'clocks' property failed!\n", __func__);
+ return ret;
}
+ plat->clk_id = prop[1];
+
+ debug("%s: base=0x%x, bus_width=%d %s dma_id=%d clk_id=%d\n",
+ __func__, (uint)plat->base, plat->buswidth,
+ plat->non_removable ? "non-removable" : NULL,
+ plat->dma_id, plat->clk_id);
+
return 0;
}
+
+static const struct udevice_id mxsmmc_ids[] = {
+ { .compatible = "fsl,imx23-mmc", },
+ { .compatible = "fsl,imx28-mmc", },
+ { /* sentinel */ }
+};
+#endif
+
+U_BOOT_DRIVER(mxsmmc) = {
+#ifdef CONFIG_MX28
+ .name = "fsl_imx28_mmc",
+#else /* CONFIG_MX23 */
+ .name = "fsl_imx23_mmc",
+#endif
+ .id = UCLASS_MMC,
+#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
+ .of_match = mxsmmc_ids,
+ .ofdata_to_platdata = mxsmmc_ofdata_to_platdata,
+#endif
+ .ops = &mxsmmc_ops,
+#if CONFIG_IS_ENABLED(BLK)
+ .bind = mxsmmc_bind,
+#endif
+ .probe = mxsmmc_probe,
+ .priv_auto_alloc_size = sizeof(struct mxsmmc_priv),
+ .platdata_auto_alloc_size = sizeof(struct mxsmmc_platdata),
+};
+
+#endif /* CONFIG_DM_MMC */
projects / u-boot.git / commitdiff