summaryrefslogtreecommitdiff
path: root/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/Makefile1
-rw-r--r--drivers/mmc/mvebu_mmc.c361
2 files changed, 362 insertions, 0 deletions
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 34febf52f0..f5be96f5e5 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -37,3 +37,4 @@ obj-$(CONFIG_SPL_MMC_BOOT) += fsl_esdhc_spl.o
else
obj-$(CONFIG_GENERIC_MMC) += mmc_write.o
endif
+obj-$(CONFIG_MVEBU_MMC) += mvebu_mmc.o
diff --git a/drivers/mmc/mvebu_mmc.c b/drivers/mmc/mvebu_mmc.c
new file mode 100644
index 0000000000..97591983d2
--- /dev/null
+++ b/drivers/mmc/mvebu_mmc.c
@@ -0,0 +1,361 @@
+/*
+ * Marvell MMC/SD/SDIO driver
+ *
+ * (C) Copyright 2012
+ * Marvell Semiconductor <www.marvell.com>
+ * Written-by: Maen Suleiman, Gerald Kerma
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <part.h>
+#include <mmc.h>
+#include <asm/io.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/kirkwood.h>
+#include <mvebu_mmc.h>
+
+#define DRIVER_NAME "MVEBU_MMC"
+
+static void mvebu_mmc_write(u32 offs, u32 val)
+{
+ writel(val, CONFIG_SYS_MMC_BASE + (offs));
+}
+
+static u32 mvebu_mmc_read(u32 offs)
+{
+ return readl(CONFIG_SYS_MMC_BASE + (offs));
+}
+
+static int mvebu_mmc_setup_data(struct mmc_data *data)
+{
+ u32 ctrl_reg;
+
+ debug("%s, data %s : blocks=%d blksz=%d\n", DRIVER_NAME,
+ (data->flags & MMC_DATA_READ) ? "read" : "write",
+ data->blocks, data->blocksize);
+
+ /* default to maximum timeout */
+ ctrl_reg = mvebu_mmc_read(SDIO_HOST_CTRL);
+ ctrl_reg |= SDIO_HOST_CTRL_TMOUT(SDIO_HOST_CTRL_TMOUT_MAX);
+ mvebu_mmc_write(SDIO_HOST_CTRL, ctrl_reg);
+
+ if (data->flags & MMC_DATA_READ) {
+ mvebu_mmc_write(SDIO_SYS_ADDR_LOW, (u32)data->dest & 0xffff);
+ mvebu_mmc_write(SDIO_SYS_ADDR_HI, (u32)data->dest >> 16);
+ } else {
+ mvebu_mmc_write(SDIO_SYS_ADDR_LOW, (u32)data->src & 0xffff);
+ mvebu_mmc_write(SDIO_SYS_ADDR_HI, (u32)data->src >> 16);
+ }
+
+ mvebu_mmc_write(SDIO_BLK_COUNT, data->blocks);
+ mvebu_mmc_write(SDIO_BLK_SIZE, data->blocksize);
+
+ return 0;
+}
+
+static int mvebu_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
+ struct mmc_data *data)
+{
+ int timeout = 10;
+ ushort waittype = 0;
+ ushort resptype = 0;
+ ushort xfertype = 0;
+ ushort resp_indx = 0;
+
+ debug("cmdidx [0x%x] resp_type[0x%x] cmdarg[0x%x]\n",
+ cmd->cmdidx, cmd->resp_type, cmd->cmdarg);
+
+ udelay(10*1000);
+
+ debug("%s: cmd %d (hw state 0x%04x)\n", DRIVER_NAME,
+ cmd->cmdidx, mvebu_mmc_read(SDIO_HW_STATE));
+
+ /* Checking if card is busy */
+ while ((mvebu_mmc_read(SDIO_HW_STATE) & CARD_BUSY)) {
+ if (timeout == 0) {
+ printf("%s: card busy!\n", DRIVER_NAME);
+ return -1;
+ }
+ timeout--;
+ udelay(1000);
+ }
+
+ /* Set up for a data transfer if we have one */
+ if (data) {
+ int err = mvebu_mmc_setup_data(data);
+
+ if (err)
+ return err;
+ }
+
+ resptype = SDIO_CMD_INDEX(cmd->cmdidx);
+
+ /* Analyzing resptype/xfertype/waittype for the command */
+ if (cmd->resp_type & MMC_RSP_BUSY)
+ resptype |= SDIO_CMD_RSP_48BUSY;
+ else if (cmd->resp_type & MMC_RSP_136)
+ resptype |= SDIO_CMD_RSP_136;
+ else if (cmd->resp_type & MMC_RSP_PRESENT)
+ resptype |= SDIO_CMD_RSP_48;
+ else
+ resptype |= SDIO_CMD_RSP_NONE;
+
+ if (cmd->resp_type & MMC_RSP_CRC)
+ resptype |= SDIO_CMD_CHECK_CMDCRC;
+
+ if (cmd->resp_type & MMC_RSP_OPCODE)
+ resptype |= SDIO_CMD_INDX_CHECK;
+
+ if (cmd->resp_type & MMC_RSP_PRESENT) {
+ resptype |= SDIO_UNEXPECTED_RESP;
+ waittype |= SDIO_NOR_UNEXP_RSP;
+ }
+
+ if (data) {
+ resptype |= SDIO_CMD_DATA_PRESENT | SDIO_CMD_CHECK_DATACRC16;
+ xfertype |= SDIO_XFER_MODE_HW_WR_DATA_EN;
+ if (data->flags & MMC_DATA_READ) {
+ xfertype |= SDIO_XFER_MODE_TO_HOST;
+ waittype = SDIO_NOR_DMA_INI;
+ } else {
+ waittype |= SDIO_NOR_XFER_DONE;
+ }
+ } else {
+ waittype |= SDIO_NOR_CMD_DONE;
+ }
+
+ /* Setting cmd arguments */
+ mvebu_mmc_write(SDIO_ARG_LOW, cmd->cmdarg & 0xffff);
+ mvebu_mmc_write(SDIO_ARG_HI, cmd->cmdarg >> 16);
+
+ /* Setting Xfer mode */
+ mvebu_mmc_write(SDIO_XFER_MODE, xfertype);
+
+ mvebu_mmc_write(SDIO_NOR_INTR_STATUS, ~SDIO_NOR_CARD_INT);
+ mvebu_mmc_write(SDIO_ERR_INTR_STATUS, SDIO_POLL_MASK);
+
+ /* Sending command */
+ mvebu_mmc_write(SDIO_CMD, resptype);
+
+ mvebu_mmc_write(SDIO_NOR_INTR_EN, SDIO_POLL_MASK);
+ mvebu_mmc_write(SDIO_ERR_INTR_EN, SDIO_POLL_MASK);
+
+ /* Waiting for completion */
+ timeout = 1000000;
+
+ while (!((mvebu_mmc_read(SDIO_NOR_INTR_STATUS)) & waittype)) {
+ if (mvebu_mmc_read(SDIO_NOR_INTR_STATUS) & SDIO_NOR_ERROR) {
+ debug("%s: error! cmdidx : %d, err reg: %04x\n",
+ DRIVER_NAME, cmd->cmdidx,
+ mvebu_mmc_read(SDIO_ERR_INTR_STATUS));
+ if (mvebu_mmc_read(SDIO_ERR_INTR_STATUS) &
+ (SDIO_ERR_CMD_TIMEOUT | SDIO_ERR_DATA_TIMEOUT))
+ return TIMEOUT;
+ return COMM_ERR;
+ }
+
+ timeout--;
+ udelay(1);
+ if (timeout <= 0) {
+ printf("%s: command timed out\n", DRIVER_NAME);
+ return TIMEOUT;
+ }
+ }
+
+ /* Handling response */
+ if (cmd->resp_type & MMC_RSP_136) {
+ uint response[8];
+
+ for (resp_indx = 0; resp_indx < 8; resp_indx++)
+ response[resp_indx]
+ = mvebu_mmc_read(SDIO_RSP(resp_indx));
+
+ cmd->response[0] = ((response[0] & 0x03ff) << 22) |
+ ((response[1] & 0xffff) << 6) |
+ ((response[2] & 0xfc00) >> 10);
+ cmd->response[1] = ((response[2] & 0x03ff) << 22) |
+ ((response[3] & 0xffff) << 6) |
+ ((response[4] & 0xfc00) >> 10);
+ cmd->response[2] = ((response[4] & 0x03ff) << 22) |
+ ((response[5] & 0xffff) << 6) |
+ ((response[6] & 0xfc00) >> 10);
+ cmd->response[3] = ((response[6] & 0x03ff) << 22) |
+ ((response[7] & 0x3fff) << 8);
+ } else if (cmd->resp_type & MMC_RSP_PRESENT) {
+ uint response[3];
+
+ for (resp_indx = 0; resp_indx < 3; resp_indx++)
+ response[resp_indx]
+ = mvebu_mmc_read(SDIO_RSP(resp_indx));
+
+ cmd->response[0] = ((response[2] & 0x003f) << (8 - 8)) |
+ ((response[1] & 0xffff) << (14 - 8)) |
+ ((response[0] & 0x03ff) << (30 - 8));
+ cmd->response[1] = ((response[0] & 0xfc00) >> 10);
+ cmd->response[2] = 0;
+ cmd->response[3] = 0;
+ }
+
+ debug("%s: resp[0x%x] ", DRIVER_NAME, cmd->resp_type);
+ debug("[0x%x] ", cmd->response[0]);
+ debug("[0x%x] ", cmd->response[1]);
+ debug("[0x%x] ", cmd->response[2]);
+ debug("[0x%x] ", cmd->response[3]);
+ debug("\n");
+
+ return 0;
+}
+
+static void mvebu_mmc_power_up(void)
+{
+ debug("%s: power up\n", DRIVER_NAME);
+
+ /* disable interrupts */
+ mvebu_mmc_write(SDIO_NOR_INTR_EN, 0);
+ mvebu_mmc_write(SDIO_ERR_INTR_EN, 0);
+
+ /* SW reset */
+ mvebu_mmc_write(SDIO_SW_RESET, SDIO_SW_RESET_NOW);
+
+ mvebu_mmc_write(SDIO_XFER_MODE, 0);
+
+ /* enable status */
+ mvebu_mmc_write(SDIO_NOR_STATUS_EN, SDIO_POLL_MASK);
+ mvebu_mmc_write(SDIO_ERR_STATUS_EN, SDIO_POLL_MASK);
+
+ /* enable interrupts status */
+ mvebu_mmc_write(SDIO_NOR_INTR_STATUS, SDIO_POLL_MASK);
+ mvebu_mmc_write(SDIO_ERR_INTR_STATUS, SDIO_POLL_MASK);
+}
+
+static void mvebu_mmc_set_clk(unsigned int clock)
+{
+ unsigned int m;
+
+ if (clock == 0) {
+ debug("%s: clock off\n", DRIVER_NAME);
+ mvebu_mmc_write(SDIO_XFER_MODE, SDIO_XFER_MODE_STOP_CLK);
+ mvebu_mmc_write(SDIO_CLK_DIV, MVEBU_MMC_BASE_DIV_MAX);
+ } else {
+ m = MVEBU_MMC_BASE_FAST_CLOCK/(2*clock) - 1;
+ if (m > MVEBU_MMC_BASE_DIV_MAX)
+ m = MVEBU_MMC_BASE_DIV_MAX;
+ mvebu_mmc_write(SDIO_CLK_DIV, m & MVEBU_MMC_BASE_DIV_MAX);
+ }
+
+ udelay(10*1000);
+}
+
+static void mvebu_mmc_set_bus(unsigned int bus)
+{
+ u32 ctrl_reg = 0;
+
+ ctrl_reg = mvebu_mmc_read(SDIO_HOST_CTRL);
+ ctrl_reg &= ~SDIO_HOST_CTRL_DATA_WIDTH_4_BITS;
+
+ switch (bus) {
+ case 4:
+ ctrl_reg |= SDIO_HOST_CTRL_DATA_WIDTH_4_BITS;
+ break;
+ case 1:
+ default:
+ ctrl_reg |= SDIO_HOST_CTRL_DATA_WIDTH_1_BIT;
+ }
+
+ /* default transfer mode */
+ ctrl_reg |= SDIO_HOST_CTRL_BIG_ENDIAN;
+ ctrl_reg &= ~SDIO_HOST_CTRL_LSB_FIRST;
+
+ /* default to maximum timeout */
+ ctrl_reg |= SDIO_HOST_CTRL_TMOUT(SDIO_HOST_CTRL_TMOUT_MAX);
+
+ ctrl_reg |= SDIO_HOST_CTRL_PUSH_PULL_EN;
+
+ ctrl_reg |= SDIO_HOST_CTRL_CARD_TYPE_MEM_ONLY;
+
+ debug("%s: ctrl 0x%04x: %s %s %s\n", DRIVER_NAME, ctrl_reg,
+ (ctrl_reg & SDIO_HOST_CTRL_PUSH_PULL_EN) ?
+ "push-pull" : "open-drain",
+ (ctrl_reg & SDIO_HOST_CTRL_DATA_WIDTH_4_BITS) ?
+ "4bit-width" : "1bit-width",
+ (ctrl_reg & SDIO_HOST_CTRL_HI_SPEED_EN) ?
+ "high-speed" : "");
+
+ mvebu_mmc_write(SDIO_HOST_CTRL, ctrl_reg);
+ udelay(10*1000);
+}
+
+static void mvebu_mmc_set_ios(struct mmc *mmc)
+{
+ debug("%s: bus[%d] clock[%d]\n", DRIVER_NAME,
+ mmc->bus_width, mmc->clock);
+ mvebu_mmc_set_bus(mmc->bus_width);
+ mvebu_mmc_set_clk(mmc->clock);
+}
+
+static int mvebu_mmc_initialize(struct mmc *mmc)
+{
+ debug("%s: mvebu_mmc_initialize", DRIVER_NAME);
+
+ /*
+ * Setting host parameters
+ * Initial Host Ctrl : Timeout : max , Normal Speed mode,
+ * 4-bit data mode, Big Endian, SD memory Card, Push_pull CMD Line
+ */
+ mvebu_mmc_write(SDIO_HOST_CTRL,
+ SDIO_HOST_CTRL_TMOUT(SDIO_HOST_CTRL_TMOUT_MAX) |
+ SDIO_HOST_CTRL_DATA_WIDTH_4_BITS |
+ SDIO_HOST_CTRL_BIG_ENDIAN |
+ SDIO_HOST_CTRL_PUSH_PULL_EN |
+ SDIO_HOST_CTRL_CARD_TYPE_MEM_ONLY);
+
+ mvebu_mmc_write(SDIO_CLK_CTRL, 0);
+
+ /* enable status */
+ mvebu_mmc_write(SDIO_NOR_STATUS_EN, SDIO_POLL_MASK);
+ mvebu_mmc_write(SDIO_ERR_STATUS_EN, SDIO_POLL_MASK);
+
+ /* disable interrupts */
+ mvebu_mmc_write(SDIO_NOR_INTR_EN, 0);
+ mvebu_mmc_write(SDIO_ERR_INTR_EN, 0);
+
+ /* SW reset */
+ mvebu_mmc_write(SDIO_SW_RESET, SDIO_SW_RESET_NOW);
+
+ udelay(10*1000);
+
+ return 0;
+}
+
+static const struct mmc_ops mvebu_mmc_ops = {
+ .send_cmd = mvebu_mmc_send_cmd,
+ .set_ios = mvebu_mmc_set_ios,
+ .init = mvebu_mmc_initialize,
+};
+
+static struct mmc_config mvebu_mmc_cfg = {
+ .name = DRIVER_NAME,
+ .ops = &mvebu_mmc_ops,
+ .f_min = MVEBU_MMC_BASE_FAST_CLOCK / MVEBU_MMC_BASE_DIV_MAX,
+ .f_max = MVEBU_MMC_CLOCKRATE_MAX,
+ .voltages = MMC_VDD_32_33 | MMC_VDD_33_34,
+ .host_caps = MMC_MODE_4BIT | MMC_MODE_HS,
+ .part_type = PART_TYPE_DOS,
+ .b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT,
+};
+
+int mvebu_mmc_init(bd_t *bis)
+{
+ struct mmc *mmc;
+
+ mvebu_mmc_power_up();
+
+ mmc = mmc_create(&mvebu_mmc_cfg, bis);
+ if (mmc == NULL)
+ return -1;
+
+ return 0;
+}
generated by cgit (git 2.34.1) at 2024-12-26 21:32:05 +0000