ARMV7: OMAP: Add new mmc driver compatible with CONFIG_GENERIC_MMC

OMAP boards currently use a legacy mmc driver. This patch adds a new
mmc driver which will work with the generic mmc driver in u-boot.

This new driver will work with both OMAP3 and OMAP4 boards.

This patch does not remove the old driver.  It should remain in the
tree until all boards that use it switch to the new driver.

Signed-off-by: Sukumar Ghorai <s-ghorai@ti.com>
Tested-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 416 insertions, 0 deletions

diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 6603d74..2ead634 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -32,6 +32,7 @@ COBJS-$(CONFIG_GENERIC_MMC) += mmc.o
 COBJS-$(CONFIG_GENERIC_ATMEL_MCI) += gen_atmel_mci.o
 COBJS-$(CONFIG_MXC_MMC) += mxcmmc.o
 COBJS-$(CONFIG_OMAP3_MMC) += omap3_mmc.o
+COBJS-$(CONFIG_OMAP_HSMMC) += omap_hsmmc.o
 COBJS-$(CONFIG_PXA_MMC) += pxa_mmc.o
 COBJS-$(CONFIG_S5P_MMC) += s5p_mmc.o
 
diff --git a/drivers/mmc/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c
new file mode 100644
index 0000000..9271470
--- /dev/null
+++ b/drivers/mmc/omap_hsmmc.c
@@ -0,0 +1,415 @@
+/*
+ * (C) Copyright 2008
+ * Texas Instruments, <www.ti.com>
+ * Sukumar Ghorai <s-ghorai@ti.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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's version 2 of
+ * the License.
+ *
+ * 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 <config.h>
+#include <common.h>
+#include <mmc.h>
+#include <part.h>
+#include <i2c.h>
+#include <twl4030.h>
+#include <asm/io.h>
+#include <asm/arch/mmc_host_def.h>
+
+static int mmc_read_data(hsmmc_t *mmc_base, char *buf, unsigned int size);
+static int mmc_write_data(hsmmc_t *mmc_base, const char *buf, unsigned int siz);
+static struct mmc hsmmc_dev[2];
+unsigned char mmc_board_init(hsmmc_t *mmc_base)
+{
+#if defined(CONFIG_TWL4030_POWER)
+	twl4030_power_mmc_init();
+#endif
+
+#if defined(CONFIG_OMAP34XX)
+	t2_t *t2_base = (t2_t *)T2_BASE;
+	struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
+
+	writel(readl(&t2_base->pbias_lite) | PBIASLITEPWRDNZ1 |
+		PBIASSPEEDCTRL0 | PBIASLITEPWRDNZ0,
+		&t2_base->pbias_lite);
+
+	writel(readl(&t2_base->devconf0) | MMCSDIO1ADPCLKISEL,
+		&t2_base->devconf0);
+
+	writel(readl(&t2_base->devconf1) | MMCSDIO2ADPCLKISEL,
+		&t2_base->devconf1);
+
+	writel(readl(&prcm_base->fclken1_core) |
+		EN_MMC1 | EN_MMC2 | EN_MMC3,
+		&prcm_base->fclken1_core);
+
+	writel(readl(&prcm_base->iclken1_core) |
+		EN_MMC1 | EN_MMC2 | EN_MMC3,
+		&prcm_base->iclken1_core);
+#endif
+
+/* TODO add appropriate OMAP4 init - none currently necessary */
+
+	return 0;
+}
+
+void mmc_init_stream(hsmmc_t *mmc_base)
+{
+
+	writel(readl(&mmc_base->con) | INIT_INITSTREAM, &mmc_base->con);
+
+	writel(MMC_CMD0, &mmc_base->cmd);
+	while (!(readl(&mmc_base->stat) & CC_MASK))
+		;
+	writel(CC_MASK, &mmc_base->stat)
+		;
+	writel(MMC_CMD0, &mmc_base->cmd)
+		;
+	while (!(readl(&mmc_base->stat) & CC_MASK))
+		;
+	writel(readl(&mmc_base->con) & ~INIT_INITSTREAM, &mmc_base->con);
+}
+
+
+static int mmc_init_setup(struct mmc *mmc)
+{
+	hsmmc_t *mmc_base = (hsmmc_t *)mmc->priv;
+	unsigned int reg_val;
+	unsigned int dsor;
+
+	mmc_board_init(mmc_base);
+
+	writel(readl(&mmc_base->sysconfig) | MMC_SOFTRESET,
+		&mmc_base->sysconfig);
+	while ((readl(&mmc_base->sysstatus) & RESETDONE) == 0)
+		;
+	writel(readl(&mmc_base->sysctl) | SOFTRESETALL, &mmc_base->sysctl);
+	while ((readl(&mmc_base->sysctl) & SOFTRESETALL) != 0x0)
+		;
+	writel(DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0, &mmc_base->hctl);
+	writel(readl(&mmc_base->capa) | VS30_3V0SUP | VS18_1V8SUP,
+		&mmc_base->capa);
+
+	reg_val = readl(&mmc_base->con) & RESERVED_MASK;
+
+	writel(CTPL_MMC_SD | reg_val | WPP_ACTIVEHIGH | CDP_ACTIVEHIGH |
+		MIT_CTO | DW8_1_4BITMODE | MODE_FUNC | STR_BLOCK |
+		HR_NOHOSTRESP | INIT_NOINIT | NOOPENDRAIN, &mmc_base->con);
+
+	dsor = 240;
+	mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK),
+		(ICE_STOP | DTO_15THDTO | CEN_DISABLE));
+	mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK,
+		(dsor << CLKD_OFFSET) | ICE_OSCILLATE);
+	while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY)
+		;
+	writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
+
+	writel(readl(&mmc_base->hctl) | SDBP_PWRON, &mmc_base->hctl);
+
+	writel(IE_BADA | IE_CERR | IE_DEB | IE_DCRC | IE_DTO | IE_CIE |
+		IE_CEB | IE_CCRC | IE_CTO | IE_BRR | IE_BWR | IE_TC | IE_CC,
+		&mmc_base->ie);
+
+	mmc_init_stream(mmc_base);
+
+	return 0;
+}
+
+
+static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
+			struct mmc_data *data)
+{
+	hsmmc_t *mmc_base = (hsmmc_t *)mmc->priv;
+	unsigned int flags, mmc_stat;
+	unsigned int retry = 0x100000;
+
+
+	while ((readl(&mmc_base->pstate) & DATI_MASK) == DATI_CMDDIS)
+		;
+	writel(0xFFFFFFFF, &mmc_base->stat);
+	while (readl(&mmc_base->stat))
+		;
+	/*
+	 * CMDREG
+	 * CMDIDX[13:8]	: Command index
+	 * DATAPRNT[5]	: Data Present Select
+	 * ENCMDIDX[4]	: Command Index Check Enable
+	 * ENCMDCRC[3]	: Command CRC Check Enable
+	 * RSPTYP[1:0]
+	 *	00 = No Response
+	 *	01 = Length 136
+	 *	10 = Length 48
+	 *	11 = Length 48 Check busy after response
+	 */
+	/* Delay added before checking the status of frq change
+	 * retry not supported by mmc.c(core file)
+	 */
+	if (cmd->cmdidx == SD_CMD_APP_SEND_SCR)
+		udelay(50000); /* wait 50 ms */
+
+	if (!(cmd->resp_type & MMC_RSP_PRESENT))
+		flags = 0;
+	else if (cmd->resp_type & MMC_RSP_136)
+		flags = RSP_TYPE_LGHT136 | CICE_NOCHECK;
+	else if (cmd->resp_type & MMC_RSP_BUSY)
+		flags = RSP_TYPE_LGHT48B;
+	else
+		flags = RSP_TYPE_LGHT48;
+
+	/* enable default flags */
+	flags =	flags | (CMD_TYPE_NORMAL | CICE_NOCHECK | CCCE_NOCHECK |
+			MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE | DE_DISABLE);
+
+	if (cmd->resp_type & MMC_RSP_CRC)
+		flags |= CCCE_CHECK;
+	if (cmd->resp_type & MMC_RSP_OPCODE)
+		flags |= CICE_CHECK;
+
+	if (data) {
+		if ((cmd->cmdidx == MMC_CMD_READ_MULTIPLE_BLOCK) ||
+			 (cmd->cmdidx == MMC_CMD_WRITE_MULTIPLE_BLOCK)) {
+			flags |= (MSBS_MULTIBLK | BCE_ENABLE);
+			data->blocksize = 512;
+			writel(data->blocksize | (data->blocks << 16),
+							&mmc_base->blk);
+		} else
+			writel(data->blocksize | NBLK_STPCNT, &mmc_base->blk);
+
+		if (data->flags & MMC_DATA_READ)
+			flags |= (DP_DATA | DDIR_READ);
+		else
+			flags |= (DP_DATA | DDIR_WRITE);
+	}
+
+	writel(cmd->cmdarg, &mmc_base->arg);
+	writel((cmd->cmdidx << 24) | flags, &mmc_base->cmd);
+
+	do {
+		mmc_stat = readl(&mmc_base->stat);
+		retry--;
+	} while ((mmc_stat == 0) && (retry > 0));
+
+	if (retry == 0) {
+		printf("%s : timeout: No status update\n", __func__);
+		return TIMEOUT;
+	}
+
+	if ((mmc_stat & IE_CTO) != 0)
+		return TIMEOUT;
+	else if ((mmc_stat & ERRI_MASK) != 0)
+		return -1;
+
+	if (mmc_stat & CC_MASK) {
+		writel(CC_MASK, &mmc_base->stat);
+		if (cmd->resp_type & MMC_RSP_PRESENT) {
+			if (cmd->resp_type & MMC_RSP_136) {
+				/* response type 2 */
+				cmd->response[3] = readl(&mmc_base->rsp10);
+				cmd->response[2] = readl(&mmc_base->rsp32);
+				cmd->response[1] = readl(&mmc_base->rsp54);
+				cmd->response[0] = readl(&mmc_base->rsp76);
+			} else
+				/* response types 1, 1b, 3, 4, 5, 6 */
+				cmd->response[0] = readl(&mmc_base->rsp10);
+		}
+	}
+
+	if (data && (data->flags & MMC_DATA_READ)) {
+		mmc_read_data(mmc_base,	data->dest,
+				data->blocksize * data->blocks);
+	} else if (data && (data->flags & MMC_DATA_WRITE)) {
+		mmc_write_data(mmc_base, data->src,
+				data->blocksize * data->blocks);
+	}
+	return 0;
+}
+
+static int mmc_read_data(hsmmc_t *mmc_base, char *buf, unsigned int size)
+{
+	unsigned int *output_buf = (unsigned int *)buf;
+	unsigned int mmc_stat;
+	unsigned int count;
+
+	/*
+	 * Start Polled Read
+	 */
+	count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size;
+	count /= 4;
+
+	while (size) {
+		do {
+			mmc_stat = readl(&mmc_base->stat);
+		} while (mmc_stat == 0);
+
+		if ((mmc_stat & ERRI_MASK) != 0)
+			return 1;
+
+		if (mmc_stat & BRR_MASK) {
+			unsigned int k;
+
+			writel(readl(&mmc_base->stat) | BRR_MASK,
+				&mmc_base->stat);
+			for (k = 0; k < count; k++) {
+				*output_buf = readl(&mmc_base->data);
+				output_buf++;
+			}
+			size -= (count*4);
+		}
+
+		if (mmc_stat & BWR_MASK)
+			writel(readl(&mmc_base->stat) | BWR_MASK,
+				&mmc_base->stat);
+
+		if (mmc_stat & TC_MASK) {
+			writel(readl(&mmc_base->stat) | TC_MASK,
+				&mmc_base->stat);
+			break;
+		}
+	}
+	return 0;
+}
+
+static int mmc_write_data(hsmmc_t *mmc_base, const char *buf, unsigned int size)
+{
+	unsigned int *input_buf = (unsigned int *)buf;
+	unsigned int mmc_stat;
+	unsigned int count;
+
+	/*
+	 * Start Polled Read
+	 */
+	count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size;
+	count /= 4;
+
+	while (size) {
+		do {
+			mmc_stat = readl(&mmc_base->stat);
+		} while (mmc_stat == 0);
+
+		if ((mmc_stat & ERRI_MASK) != 0)
+			return 1;
+
+		if (mmc_stat & BWR_MASK) {
+			unsigned int k;
+
+			writel(readl(&mmc_base->stat) | BWR_MASK,
+					&mmc_base->stat);
+			for (k = 0; k < count; k++) {
+				writel(*input_buf, &mmc_base->data);
+				input_buf++;
+			}
+			size -= (count*4);
+		}
+
+		if (mmc_stat & BRR_MASK)
+			writel(readl(&mmc_base->stat) | BRR_MASK,
+				&mmc_base->stat);
+
+		if (mmc_stat & TC_MASK) {
+			writel(readl(&mmc_base->stat) | TC_MASK,
+				&mmc_base->stat);
+			break;
+		}
+	}
+	return 0;
+}
+
+static void mmc_set_ios(struct mmc *mmc)
+{
+	hsmmc_t *mmc_base = (hsmmc_t *)mmc->priv;
+	unsigned int dsor = 0;
+
+	/* configue bus width */
+	switch (mmc->bus_width) {
+	case 8:
+		writel(readl(&mmc_base->con) | DTW_8_BITMODE,
+			&mmc_base->con);
+		break;
+
+	case 4:
+		writel(readl(&mmc_base->con) & ~DTW_8_BITMODE,
+			&mmc_base->con);
+		writel(readl(&mmc_base->hctl) | DTW_4_BITMODE,
+			&mmc_base->hctl);
+		break;
+
+	case 1:
+	default:
+		writel(readl(&mmc_base->con) & ~DTW_8_BITMODE,
+			&mmc_base->con);
+		writel(readl(&mmc_base->hctl) & ~DTW_4_BITMODE,
+			&mmc_base->hctl);
+		break;
+	}
+
+	/* configure clock with 96Mhz system clock.
+	 */
+	if (mmc->clock != 0) {
+		dsor = (MMC_CLOCK_REFERENCE * 1000000 / mmc->clock);
+		if ((MMC_CLOCK_REFERENCE * 1000000) / dsor > mmc->clock)
+			dsor++;
+	}
+
+	mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK),
+				(ICE_STOP | DTO_15THDTO | CEN_DISABLE));
+
+	mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK,
+				(dsor << CLKD_OFFSET) | ICE_OSCILLATE);
+
+	while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY)
+		;
+	writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
+}
+
+int omap_mmc_init(int dev_index)
+{
+	struct mmc *mmc;
+
+	mmc = &hsmmc_dev[dev_index];
+
+	sprintf(mmc->name, "OMAP SD/MMC");
+	mmc->send_cmd = mmc_send_cmd;
+	mmc->set_ios = mmc_set_ios;
+	mmc->init = mmc_init_setup;
+
+	switch (dev_index) {
+	case 0:
+		mmc->priv = (hsmmc_t *)OMAP_HSMMC1_BASE;
+		break;
+	case 1:
+		mmc->priv = (hsmmc_t *)OMAP_HSMMC2_BASE;
+		break;
+	case 2:
+		mmc->priv = (hsmmc_t *)OMAP_HSMMC3_BASE;
+		break;
+	default:
+		mmc->priv = (hsmmc_t *)OMAP_HSMMC1_BASE;
+		return 1;
+	}
+	mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
+	mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_HS_52MHz | MMC_MODE_HS;
+
+	mmc->f_min = 400000;
+	mmc->f_max = 52000000;
+
+	mmc_register(mmc);
+
+	return 0;
+}
+