[U-Boot] [PATCH v2 1/4] mmc: dw-mmc: support DesignWare MMC Controller

Jaehoon Chung
2012-07-03T07:58:01Z

This patch is supported DesginWare MMC Controller.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Rajeshawari Shinde <rajeshwari.s@samsung.com>
---
drivers/mmc/dw_mmc.c | 400 ++++++++++++++++++++++++++++++++++++++++++++++++++
include/dwmmc.h | 186 +++++++++++++++++++++++
2 files changed, 586 insertions(+), 0 deletions(-)
create mode 100644 drivers/mmc/dw_mmc.c
create mode 100644 include/dwmmc.h

diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
new file mode 100644
index 0000000..e634e1d
--- /dev/null
+++ b/drivers/mmc/dw_mmc.c
@@ -0,0 +1,400 @@
+/*
+ * (C) Copyright 2012 SAMSUNG Electronics
+ * Jaehoon Chung <jh80.chung@samsung.com>
+ * Rajeshawari Shinde <rajeshwari.s@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <mmc.h>
+#include <dwmmc.h>
+#include <asm/arch/clk.h>
+#include <asm-generic/errno.h>
+
+#define PAGE_SIZE 4096
+
+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;
+ if (timeout == 0)
+ break;
+ }
+ return 0;
+}
+
+static void dwmci_set_idma_desc(u8 *idmac, unsigned int des0,
+ unsigned int des1, unsigned int des2)
+{
+ struct dwmci_idmac *desc = (struct dwmci_idmac *)idmac;
+
+ desc->des0 = des0;
+ desc->des1 = des1;
+ desc->des2 = des2;
+ desc->des3 = (unsigned int)desc + sizeof(struct dwmci_idmac);
+}
+
+static void dwmci_prepare_data(struct dwmci_host *host,
+ struct mmc_data *data)
+{
+ unsigned long ctrl;
+ unsigned int i = 0, flag, cnt, blk_cnt;
+ struct dwmci_idmac *p;
+ ulong data_start, data_end, start_addr;
+ ALLOC_CACHE_ALIGN_BUFFER(struct dwmci_idmac, idmac, 65565);
+
+
+ p = idmac;
+ blk_cnt = data->blocks;
+
+ dwmci_wait_reset(host, DWMCI_CTRL_FIFO_RESET);
+
+ if (data->flags == MMC_DATA_READ)
+ start_addr = (unsigned int)data->dest;
+ else
+ start_addr = (unsigned int)data->src;
+
+ do {
+ flag = DWMCI_IDMAC_OWN | DWMCI_IDMAC_CH ;
+ flag |= (i == 0) ? DWMCI_IDMAC_FS : 0;
+ if (blk_cnt <= 8) {
+ flag |= DWMCI_IDMAC_LD;
+ cnt = data->blocksize * blk_cnt;
+ } else {
+ flag &= ~DWMCI_IDMAC_LD;
+ cnt = data->blocksize * 8;
+ }
+
+ dwmci_set_idma_desc((u8 *)p, flag, cnt,
+ start_addr + (i * PAGE_SIZE));
+
+ if (blk_cnt <= 8)
+ break;
+ blk_cnt -= 8;
+ p++;
+ i++;
+ } while(1);
+
+ data_start = (ulong)idmac;
+ data_end = (ulong)p;
+ flush_dcache_range(data_start, data_end + ARCH_DMA_MINALIGN);
+
+ dwmci_writel(host, DWMCI_DBADDR, (unsigned int)(idmac));
+
+ ctrl = dwmci_readl(host, DWMCI_CTRL);
+ ctrl |= DWMCI_IDMAC_EN | DWMCI_DMA_EN;
+ dwmci_writel(host, DWMCI_CTRL, ctrl);
+
+ ctrl = dwmci_readl(host, DWMCI_BMOD);
+ ctrl |= DWMCI_BMOD_IDMAC_FB | DWMCI_BMOD_IDMAC_EN;
+ dwmci_writel(host, DWMCI_BMOD, ctrl);
+
+ dwmci_writel(host, DWMCI_BLKSIZ, data->blocksize);
+ dwmci_writel(host, DWMCI_BYTCNT, data->blocksize * data->blocks);
+}
+
+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 = (struct dwmci_host *)mmc->priv;
+ int flags = 0, i;
+ unsigned int timeout = 100000;
+ u32 retry = 10000;
+ u32 mask, ctrl;
+
+ while (dwmci_readl(host, DWMCI_STATUS) & DWMCI_BUSY) {
+ if (timeout == 0) {
+ printf("Timeout on data busy\n");
+ return TIMEOUT;
+ }
+ timeout--;
+ }
+
+ dwmci_writel(host, DWMCI_RINTSTS, DWMCI_INTMSK_ALL);
+
+ if (data)
+ dwmci_prepare_data(host, data);
+
+
+ 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)
+ return TIMEOUT;
+
+ if (mask & DWMCI_INTMSK_RTO) {
+ debug("Response Timeout..\n");
+ return TIMEOUT;
+ } else if (mask & DWMCI_INTMSK_RE) {
+ debug("Response Error..\n");
+ return -1;
+ }
+
+
+ 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) {
+ while (1) {
+ mask = dwmci_readl(host, DWMCI_RINTSTS);
+ if (mask & (DWMCI_DATA_ERR | DWMCI_DATA_TOUT)) {
+ debug("DATA ERROR!\n");
+ return -1;
+ } else if (mask & DWMCI_INTMSK_DTO)
+ break;
+ }
+
+ dwmci_writel(host, DWMCI_RINTSTS, mask);
+
+ ctrl = dwmci_readl(host, DWMCI_CTRL);
+ ctrl &= ~(DWMCI_DMA_EN);
+ dwmci_writel(host, DWMCI_CTRL, ctrl);
+ }
+
+ udelay(100);
+
+ return 0;
+}
+
+static int dwmci_setup_bus(struct dwmci_host *host, u32 freq)
+{
+ u32 div, status;
+ int timeout = 10000;
+ unsigned long sclk;
+
+ if (freq == host->clock)
+ return 0;
+
+ /*
+ * If host->mmc_clk didn't define,
+ * then assume that host->bus_hz is source clock value.
+ * host->bus_hz should be set from user.
+ */
+ if (host->mmc_clk)
+ sclk = host->mmc_clk(host->dev_index);
+ else if (host->bus_hz)
+ sclk = host->bus_hz;
+ else {
+ printf("Didn't get source clock value..\n");
+ return -EINVAL;
+ }
+
+ for (div = 1; div < 255; div++) {
+ if ((sclk / (2 * div)) <= freq) {
+ break;
+ }
+ }
+
+ 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) {
+ printf("TIMEOUT error!!\n");
+ return -ETIMEDOUT;
+ }
+ } while ((status & DWMCI_CMD_START) && timeout--);
+
+ 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) {
+ printf("TIMEOUT error!!\n");
+ return -ETIMEDOUT;
+ }
+ } while ((status & DWMCI_CMD_START) && timeout--);
+
+ host->clock = freq;
+
+ return 0;
+}
+
+static void dwmci_set_ios(struct mmc *mmc)
+{
+ struct dwmci_host *host = (struct dwmci_host *)mmc->priv;
+ u32 ctype;
+
+ 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);
+
+ if (host->clksel)
+ host->clksel(host);
+}
+
+static int dwmci_init(struct mmc *mmc)
+{
+ struct dwmci_host *host = (struct dwmci_host *)mmc->priv;
+ u32 fifo_size, fifoth_val;
+
+ dwmci_writel(host, DWMCI_PWREN, 1);
+
+ if (!dwmci_wait_reset(host, DWMCI_RESET_ALL)) {
+ debug("%s[%d] Fail-reset!!\n",__func__,__LINE__);
+ return -1;
+ }
+
+ 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);
+
+ fifo_size = dwmci_readl(host, DWMCI_FIFOTH);
+ if (host->fifoth_val)
+ fifoth_val = host->fifoth_val;
+ else
+ fifoth_val = (0x2 << 28) | ((fifo_size/2 -1) << 16) |
+ ((fifo_size/2) << 0);
+ dwmci_writel(host, DWMCI_FIFOTH, fifoth_val);
+
+ dwmci_writel(host, DWMCI_CLKENA, 0);
+ dwmci_writel(host, DWMCI_CLKSRC, 0);
+
+ return 0;
+}
+
+int add_dwmci(struct dwmci_host *host, u32 max_clk, u32 min_clk, int index)
+{
+ struct mmc *mmc;
+ int err = 0;
+
+ mmc = malloc(sizeof(struct mmc));
+ if (!mmc) {
+ printf("mmc malloc fail!\n");
+ return -1;
+ }
+
+ mmc->priv = host;
+ host->mmc = mmc;
+
+ sprintf(mmc->name, "%s", host->name);
+ mmc->send_cmd = dwmci_send_cmd;
+ mmc->set_ios = dwmci_set_ios;
+ mmc->init = dwmci_init;
+ mmc->f_min = min_clk;
+ mmc->f_max = max_clk;
+
+ mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
+
+ if (host->caps)
+ mmc->host_caps = host->caps;
+ else
+ mmc->host_caps = 0;
+
+ if (host->buswidth == 8) {
+ mmc->host_caps |= MMC_MODE_8BIT;
+ mmc->host_caps &= ~MMC_MODE_4BIT;
+ } else {
+ mmc->host_caps |= MMC_MODE_4BIT;
+ mmc->host_caps &= ~MMC_MODE_8BIT;
+ }
+ mmc->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_HC;
+
+ err = mmc_register(mmc);
+
+ return err;
+}
diff --git a/include/dwmmc.h b/include/dwmmc.h
new file mode 100644
index 0000000..9648586
--- /dev/null
+++ b/include/dwmmc.h
@@ -0,0 +1,186 @@
+/*
+ * (C) Copyright 2012 SAMSUNG Electronics
+ * Jaehoon Chung <jh80.chung@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef __DWMMC_HW_H
+#define __DWMMC_HW_H
+
+#include <asm/io.h>
+#include <mmc.h>
+
+#define DWMCI_CTRL 0x000
+#define DWMCI_PWREN 0x004
+#define DWMCI_CLKDIV 0x008
+#define DWMCI_CLKSRC 0x00C
+#define DWMCI_CLKENA 0x010
+#define DWMCI_TMOUT 0x014
+#define DWMCI_CTYPE 0x018
+#define DWMCI_BLKSIZ 0x01C
+#define DWMCI_BYTCNT 0x020
+#define DWMCI_INTMASK 0x024
+#define DWMCI_CMDARG 0x028
+#define DWMCI_CMD 0x02C
+#define DWMCI_RESP0 0x030
+#define DWMCI_RESP1 0x034
+#define DWMCI_RESP2 0x038
+#define DWMCI_RESP3 0x03C
+#define DWMCI_MINTSTS 0x040
+#define DWMCI_RINTSTS 0x044
+#define DWMCI_STATUS 0x048
+#define DWMCI_FIFOTH 0x04C
+#define DWMCI_CDETECT 0x050
+#define DWMCI_WRTPRT 0x054
+#define DWMCI_GPIO 0x058
+#define DWMCI_TCMCNT 0x05C
+#define DWMCI_TBBCNT 0x060
+#define DWMCI_DEBNCE 0x064
+#define DWMCI_USRID 0x068
+#define DWMCI_VERID 0x06C
+#define DWMCI_HCON 0x070
+#define DWMCI_UHS_REG 0x074
+#define DWMCI_BMOD 0x080
+#define DWMCI_PLDMND 0x084
+#define DWMCI_DBADDR 0x088
+#define DWMCI_IDSTS 0x08C
+#define DWMCI_IDINTEN 0x090
+#define DWMCI_DSCADDR 0x094
+#define DWMCI_BUFADDR 0x098
+#define DWMCI_DATA 0x200
+
+/* Interrupt Mask register */
+#define DWMCI_INTMSK_ALL 0xffffffff
+#define DWMCI_INTMSK_RE (1 << 1)
+#define DWMCI_INTMSK_CDONE (1 << 2)
+#define DWMCI_INTMSK_DTO (1 << 3)
+#define DWMCI_INTMSK_TXDR (1 << 4)
+#define DWMCI_INTMSK_RXDR (1 << 5)
+#define DWMCI_INTMSK_DCRC (1 << 7)
+#define DWMCI_INTMSK_RTO (1 << 8)
+#define DWMCI_INTMSK_DRTO (1 << 9)
+#define DWMCI_INTMSK_HTO (1 << 10)
+#define DWMCI_INTMSK_FRUN (1 << 11)
+#define DWMCI_INTMSK_HLE (1 << 12)
+#define DWMCI_INTMSK_SBE (1 << 13)
+#define DWMCI_INTMSK_ACD (1 << 14)
+#define DWMCI_INTMSK_EBE (1 << 15)
+
+/* Raw interrupt Regsiter */
+#define DWMCI_DATA_ERR (DWMCI_INTMSK_EBE | DWMCI_INTMSK_SBE | DWMCI_INTMSK_HLE |\
+ DWMCI_INTMSK_FRUN | DWMCI_INTMSK_EBE | DWMCI_INTMSK_DCRC)
+#define DWMCI_DATA_TOUT (DWMCI_INTMSK_HTO | DWMCI_INTMSK_DRTO)
+/* CTRL register */
+#define DWMCI_CTRL_RESET (1 << 0)
+#define DWMCI_CTRL_FIFO_RESET (1 << 1)
+#define DWMCI_CTRL_DMA_RESET (1 << 2)
+#define DWMCI_DMA_EN (1 << 5)
+#define DWMCI_CTRL_SEND_AS_CCSD (1 << 10)
+#define DWMCI_IDMAC_EN (1 << 25)
+#define DWMCI_RESET_ALL (DWMCI_CTRL_RESET | DWMCI_CTRL_FIFO_RESET |\
+ DWMCI_CTRL_DMA_RESET)
+
+/* CMD register */
+#define DWMCI_CMD_RESP_EXP (1 << 6)
+#define DWMCI_CMD_RESP_LENGTH (1 << 7)
+#define DWMCI_CMD_CHECK_CRC (1 << 8)
+#define DWMCI_CMD_DATA_EXP (1 << 9)
+#define DWMCI_CMD_RW (1 << 10)
+#define DWMCI_CMD_SEND_STOP (1 << 12)
+#define DWMCI_CMD_ABORT_STOP (1 << 14)
+#define DWMCI_CMD_PRV_DAT_WAIT (1 << 13)
+#define DWMCI_CMD_UPD_CLK (1 << 21)
+#define DWMCI_CMD_USE_HOLD_REG (1 << 29)
+#define DWMCI_CMD_START (1 << 31)
+
+/* CLKENA register */
+#define DWMCI_CLKEN_ENABLE (1 << 0)
+#define DWMCI_CLKEN_LOW_PWR (1 << 16)
+
+/* Card-type registe */
+#define DWMCI_CTYPE_1BIT 0
+#define DWMCI_CTYPE_4BIT (1 << 0)
+#define DWMCI_CTYPE_8BIT (1 << 16)
+
+/* Status Register */
+#define DWMCI_BUSY (1 << 9)
+
+#define DWMCI_IDMAC_OWN (1 << 31)
+#define DWMCI_IDMAC_CH (1 << 4)
+#define DWMCI_IDMAC_FS (1 << 3)
+#define DWMCI_IDMAC_LD (1 << 2)
+
+/* Bus Mode Register */
+#define DWMCI_BMOD_IDMAC_RESET (1 << 0)
+#define DWMCI_BMOD_IDMAC_FB (1 << 1)
+#define DWMCI_BMOD_IDMAC_EN (1 << 7)
+
+struct dwmci_host {
+ char *name;
+ void *ioaddr;
+ unsigned int quirks;
+ unsigned int caps;
+ unsigned int version;
+ unsigned int clock;
+ unsigned int bus_hz;
+ int dev_index;
+ int buswidth;
+ u32 fifoth_val;
+ struct mmc *mmc;
+
+ void (*clksel)(struct dwmci_host *host);
+ unsigned int (*mmc_clk)(int dev_index);
+};
+
+struct dwmci_idmac {
+ u32 des0;
+ u32 des1;
+ u32 des2;
+ u32 des3;
+};
+
+static inline void dwmci_writel(struct dwmci_host *host, int reg, u32 val)
+{
+ writel(val, host->ioaddr + reg);
+}
+
+static inline void dwmci_writew(struct dwmci_host *host, int reg, u16 val)
+{
+ writew(val, host->ioaddr + reg);
+}
+
+static inline void dwmci_writeb(struct dwmci_host *host, int reg, u8 val)
+{
+ writeb(val, host->ioaddr + reg);
+}
+static inline u32 dwmci_readl(struct dwmci_host *host, int reg)
+{
+ return readl(host->ioaddr + reg);
+}
+
+static inline u16 dwmci_readw(struct dwmci_host *host, int reg)
+{
+ return readw(host->ioaddr + reg);
+}
+
+static inline u8 dwmci_readb(struct dwmci_host *host, int reg)
+{
+ return readb(host->ioaddr + reg);
+}
+
+int add_dwmci(struct dwmci_host *host, u32 max_clk, u32 min_clk, int index);
+#endif /* __DWMMC_HW_H */