mmc: support the sdhci instead of s5p_mmc for samsung-soc

In driver mmc, generic s5p_sdhci code is implemented.
s5p_mmc file  is dupulicated.
we are good that use the generic sdhci.
This patch supported the sdhci  for Samsung-SoC.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Lei Wen<leiwen@marvell.com>
Acked-by: Minkyu Kang <mk7.kang@samsung.com>

3 files changed, 99 insertions, 491 deletions

diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index c245352..a8e681c 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -39,8 +39,8 @@ COBJS-$(CONFIG_MXS_MMC) += mxsmmc.o
 COBJS-$(CONFIG_OMAP_HSMMC) += omap_hsmmc.o
 COBJS-$(CONFIG_PXA_MMC) += pxa_mmc.o
 COBJS-$(CONFIG_PXA_MMC_GENERIC) += pxa_mmc_gen.o
-COBJS-$(CONFIG_S5P_MMC) += s5p_mmc.o
 COBJS-$(CONFIG_SDHCI) += sdhci.o
+COBJS-$(CONFIG_S5P_SDHCI) += s5p_sdhci.o
 COBJS-$(CONFIG_SH_MMCIF) += sh_mmcif.o
 COBJS-$(CONFIG_TEGRA2_MMC) += tegra2_mmc.o
 
diff --git a/drivers/mmc/s5p_mmc.c b/drivers/mmc/s5p_mmc.c
deleted file mode 100644
index 4ae3aaf..0000000
--- a/drivers/mmc/s5p_mmc.c
+++ /dev/null
@@ -1,490 +0,0 @@
-/*
- * (C) Copyright 2009 SAMSUNG Electronics
- * Minkyu Kang <mk7.kang@samsung.com>
- * 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
- */
-
-#include <common.h>
-#include <mmc.h>
-#include <asm/io.h>
-#include <asm/arch/mmc.h>
-#include <asm/arch/clk.h>
-
-/* support 4 mmc hosts */
-struct mmc mmc_dev[4];
-struct mmc_host mmc_host[4];
-
-static inline struct s5p_mmc *s5p_get_base_mmc(int dev_index)
-{
-	unsigned long offset = dev_index * sizeof(struct s5p_mmc);
-	return (struct s5p_mmc *)(samsung_get_base_mmc() + offset);
-}
-
-static void mmc_prepare_data(struct mmc_host *host, struct mmc_data *data)
-{
-	unsigned char ctrl;
-
-	debug("data->dest: %08x\n", (u32)data->dest);
-	writel((u32)data->dest, &host->reg->sysad);
-	/*
-	 * DMASEL[4:3]
-	 * 00 = Selects SDMA
-	 * 01 = Reserved
-	 * 10 = Selects 32-bit Address ADMA2
-	 * 11 = Selects 64-bit Address ADMA2
-	 */
-	ctrl = readb(&host->reg->hostctl);
-	ctrl &= ~(3 << 3);
-	writeb(ctrl, &host->reg->hostctl);
-
-	/* We do not handle DMA boundaries, so set it to max (512 KiB) */
-	writew((7 << 12) | (data->blocksize & 0xFFF), &host->reg->blksize);
-	writew(data->blocks, &host->reg->blkcnt);
-}
-
-static void mmc_set_transfer_mode(struct mmc_host *host, struct mmc_data *data)
-{
-	unsigned short mode;
-
-	/*
-	 * TRNMOD
-	 * MUL1SIN0[5]	: Multi/Single Block Select
-	 * RD1WT0[4]	: Data Transfer Direction Select
-	 *	1 = read
-	 *	0 = write
-	 * ENACMD12[2]	: Auto CMD12 Enable
-	 * ENBLKCNT[1]	: Block Count Enable
-	 * ENDMA[0]	: DMA Enable
-	 */
-	mode = (1 << 1) | (1 << 0);
-	if (data->blocks > 1)
-		mode |= (1 << 5);
-	if (data->flags & MMC_DATA_READ)
-		mode |= (1 << 4);
-
-	writew(mode, &host->reg->trnmod);
-}
-
-static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
-			struct mmc_data *data)
-{
-	struct mmc_host *host = (struct mmc_host *)mmc->priv;
-	int flags, i;
-	unsigned int timeout;
-	unsigned int mask;
-	unsigned int retry = 0x100000;
-
-	/* Wait max 10 ms */
-	timeout = 10;
-
-	/*
-	 * PRNSTS
-	 * CMDINHDAT[1]	: Command Inhibit (DAT)
-	 * CMDINHCMD[0]	: Command Inhibit (CMD)
-	 */
-	mask = (1 << 0);
-	if ((data != NULL) || (cmd->resp_type & MMC_RSP_BUSY))
-		mask |= (1 << 1);
-
-	/*
-	 * We shouldn't wait for data inihibit for stop commands, even
-	 * though they might use busy signaling
-	 */
-	if (data)
-		mask &= ~(1 << 1);
-
-	while (readl(&host->reg->prnsts) & mask) {
-		if (timeout == 0) {
-			printf("%s: timeout error\n", __func__);
-			return -1;
-		}
-		timeout--;
-		udelay(1000);
-	}
-
-	if (data)
-		mmc_prepare_data(host, data);
-
-	debug("cmd->arg: %08x\n", cmd->cmdarg);
-	writel(cmd->cmdarg, &host->reg->argument);
-
-	if (data)
-		mmc_set_transfer_mode(host, data);
-
-	if ((cmd->resp_type & MMC_RSP_136) && (cmd->resp_type & MMC_RSP_BUSY))
-		return -1;
-
-	/*
-	 * 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
-	 */
-	if (!(cmd->resp_type & MMC_RSP_PRESENT))
-		flags = 0;
-	else if (cmd->resp_type & MMC_RSP_136)
-		flags = (1 << 0);
-	else if (cmd->resp_type & MMC_RSP_BUSY)
-		flags = (3 << 0);
-	else
-		flags = (2 << 0);
-
-	if (cmd->resp_type & MMC_RSP_CRC)
-		flags |= (1 << 3);
-	if (cmd->resp_type & MMC_RSP_OPCODE)
-		flags |= (1 << 4);
-	if (data)
-		flags |= (1 << 5);
-
-	debug("cmd: %d\n", cmd->cmdidx);
-
-	writew((cmd->cmdidx << 8) | flags, &host->reg->cmdreg);
-
-	for (i = 0; i < retry; i++) {
-		mask = readl(&host->reg->norintsts);
-		/* Command Complete */
-		if (mask & (1 << 0)) {
-			if (!data)
-				writel(mask, &host->reg->norintsts);
-			break;
-		}
-	}
-
-	if (i == retry) {
-		printf("%s: waiting for status update\n", __func__);
-		return TIMEOUT;
-	}
-
-	if (mask & (1 << 16)) {
-		/* Timeout Error */
-		debug("timeout: %08x cmd %d\n", mask, cmd->cmdidx);
-		return TIMEOUT;
-	} else if (mask & (1 << 15)) {
-		/* Error Interrupt */
-		debug("error: %08x cmd %d\n", mask, cmd->cmdidx);
-		return -1;
-	}
-
-	if (cmd->resp_type & MMC_RSP_PRESENT) {
-		if (cmd->resp_type & MMC_RSP_136) {
-			/* CRC is stripped so we need to do some shifting. */
-			for (i = 0; i < 4; i++) {
-				unsigned int offset =
-					(unsigned int)(&host->reg->rspreg3 - i);
-				cmd->response[i] = readl(offset) << 8;
-
-				if (i != 3) {
-					cmd->response[i] |=
-						readb(offset - 1);
-				}
-				debug("cmd->resp[%d]: %08x\n",
-						i, cmd->response[i]);
-			}
-		} else if (cmd->resp_type & MMC_RSP_BUSY) {
-			for (i = 0; i < retry; i++) {
-				/* PRNTDATA[23:20] : DAT[3:0] Line Signal */
-				if (readl(&host->reg->prnsts)
-					& (1 << 20))	/* DAT[0] */
-					break;
-			}
-
-			if (i == retry) {
-				printf("%s: card is still busy\n", __func__);
-				return TIMEOUT;
-			}
-
-			cmd->response[0] = readl(&host->reg->rspreg0);
-			debug("cmd->resp[0]: %08x\n", cmd->response[0]);
-		} else {
-			cmd->response[0] = readl(&host->reg->rspreg0);
-			debug("cmd->resp[0]: %08x\n", cmd->response[0]);
-		}
-	}
-
-	if (data) {
-		while (1) {
-			mask = readl(&host->reg->norintsts);
-
-			if (mask & (1 << 15)) {
-				/* Error Interrupt */
-				writel(mask, &host->reg->norintsts);
-				printf("%s: error during transfer: 0x%08x\n",
-						__func__, mask);
-				return -1;
-			} else if (mask & (1 << 3)) {
-				/*
-				 * DMA Interrupt, restart the transfer where
-				 * it was interrupted.
-				 */
-				unsigned int address = readl(&host->reg->sysad);
-
-				debug("DMA end\n");
-				writel((1 << 3), &host->reg->norintsts);
-				writel(address, &host->reg->sysad);
-			} else if (mask & (1 << 1)) {
-				/* Transfer Complete */
-				debug("r/w is done\n");
-				break;
-			}
-		}
-		writel(mask, &host->reg->norintsts);
-	}
-
-	udelay(1000);
-	return 0;
-}
-
-static void mmc_change_clock(struct mmc_host *host, uint clock)
-{
-	int div;
-	unsigned short clk;
-	unsigned long timeout;
-	unsigned long ctrl2;
-
-	/*
-	 * SELBASECLK[5:4]
-	 * 00/01 = HCLK
-	 * 10 = EPLL
-	 * 11 = XTI or XEXTCLK
-	 */
-	ctrl2 = readl(&host->reg->control2);
-	ctrl2 &= ~(3 << 4);
-	ctrl2 |= (2 << 4);
-	writel(ctrl2, &host->reg->control2);
-
-	writew(0, &host->reg->clkcon);
-
-	/* XXX: we assume that clock is between 40MHz and 50MHz */
-	if (clock == 0)
-		goto out;
-	else if (clock <= 400000)
-		div = 0x100;
-	else if (clock <= 20000000)
-		div = 4;
-	else if (clock <= 26000000)
-		div = 2;
-	else
-		div = 1;
-	debug("div: %d\n", div);
-
-	div >>= 1;
-	/*
-	 * CLKCON
-	 * SELFREQ[15:8]	: base clock divied by value
-	 * ENSDCLK[2]		: SD Clock Enable
-	 * STBLINTCLK[1]	: Internal Clock Stable
-	 * ENINTCLK[0]		: Internal Clock Enable
-	 */
-	clk = (div << 8) | (1 << 0);
-	writew(clk, &host->reg->clkcon);
-
-	set_mmc_clk(host->dev_index, div);
-
-	/* Wait max 10 ms */
-	timeout = 10;
-	while (!(readw(&host->reg->clkcon) & (1 << 1))) {
-		if (timeout == 0) {
-			printf("%s: timeout error\n", __func__);
-			return;
-		}
-		timeout--;
-		udelay(1000);
-	}
-
-	clk |= (1 << 2);
-	writew(clk, &host->reg->clkcon);
-
-out:
-	host->clock = clock;
-}
-
-static void mmc_set_ios(struct mmc *mmc)
-{
-	struct mmc_host *host = mmc->priv;
-	unsigned char ctrl;
-	unsigned long val;
-
-	debug("bus_width: %x, clock: %d\n", mmc->bus_width, mmc->clock);
-
-	/*
-	 * SELCLKPADDS[17:16]
-	 * 00 = 2mA
-	 * 01 = 4mA
-	 * 10 = 7mA
-	 * 11 = 9mA
-	 */
-	writel(0x3 << 16, &host->reg->control4);
-
-	val = readl(&host->reg->control2);
-	val &= (0x3 << 4);
-
-	val |=	(1 << 31) |	/* write status clear async mode enable */
-		(1 << 30) |	/* command conflict mask enable */
-		(1 << 14) |	/* Feedback Clock Enable for Rx Clock */
-		(1 << 8);	/* SDCLK hold enable */
-
-	writel(val, &host->reg->control2);
-
-	/*
-	 * FCSEL1[15] FCSEL0[7]
-	 * FCSel[1:0] : Rx Feedback Clock Delay Control
-	 *	Inverter delay means10ns delay if SDCLK 50MHz setting
-	 *	01 = Delay1 (basic delay)
-	 *	11 = Delay2 (basic delay + 2ns)
-	 *	00 = Delay3 (inverter delay)
-	 *	10 = Delay4 (inverter delay + 2ns)
-	 */
-	writel(0x8080, &host->reg->control3);
-
-	mmc_change_clock(host, mmc->clock);
-
-	ctrl = readb(&host->reg->hostctl);
-
-	/*
-	 * WIDE8[5]
-	 * 0 = Depend on WIDE4
-	 * 1 = 8-bit mode
-	 * WIDE4[1]
-	 * 1 = 4-bit mode
-	 * 0 = 1-bit mode
-	 */
-	if (mmc->bus_width == 8)
-		ctrl |= (1 << 5);
-	else if (mmc->bus_width == 4)
-		ctrl |= (1 << 1);
-	else
-		ctrl &= ~(1 << 1);
-
-	/*
-	 * OUTEDGEINV[2]
-	 * 1 = Riging edge output
-	 * 0 = Falling edge output
-	 */
-	ctrl &= ~(1 << 2);
-
-	writeb(ctrl, &host->reg->hostctl);
-}
-
-static void mmc_reset(struct mmc_host *host)
-{
-	unsigned int timeout;
-
-	/*
-	 * RSTALL[0] : Software reset for all
-	 * 1 = reset
-	 * 0 = work
-	 */
-	writeb((1 << 0), &host->reg->swrst);
-
-	host->clock = 0;
-
-	/* Wait max 100 ms */
-	timeout = 100;
-
-	/* hw clears the bit when it's done */
-	while (readb(&host->reg->swrst) & (1 << 0)) {
-		if (timeout == 0) {
-			printf("%s: timeout error\n", __func__);
-			return;
-		}
-		timeout--;
-		udelay(1000);
-	}
-}
-
-static int mmc_core_init(struct mmc *mmc)
-{
-	struct mmc_host *host = (struct mmc_host *)mmc->priv;
-	unsigned int mask;
-
-	mmc_reset(host);
-
-	host->version = readw(&host->reg->hcver);
-
-	/* mask all */
-	writel(0xffffffff, &host->reg->norintstsen);
-	writel(0xffffffff, &host->reg->norintsigen);
-
-	writeb(0xe, &host->reg->timeoutcon);	/* TMCLK * 2^27 */
-
-	/*
-	 * NORMAL Interrupt Status Enable Register init
-	 * [5] ENSTABUFRDRDY : Buffer Read Ready Status Enable
-	 * [4] ENSTABUFWTRDY : Buffer write Ready Status Enable
-	 * [3] ENSTADMAINT : DMA Interrupt Status Enable
-	 * [1] ENSTASTANSCMPLT : Transfre Complete Status Enable
-	 * [0] ENSTACMDCMPLT : Command Complete Status Enable
-	 */
-	mask = readl(&host->reg->norintstsen);
-	mask &= ~(0xffff);
-	mask |= (1 << 5) | (1 << 4) | (1 << 3) | (1 << 1) | (1 << 0);
-	writel(mask, &host->reg->norintstsen);
-
-	/*
-	 * NORMAL Interrupt Signal Enable Register init
-	 * [1] ENSTACMDCMPLT : Transfer Complete Signal Enable
-	 */
-	mask = readl(&host->reg->norintsigen);
-	mask &= ~(0xffff);
-	mask |= (1 << 1);
-	writel(mask, &host->reg->norintsigen);
-
-	return 0;
-}
-
-static int s5p_mmc_initialize(int dev_index, int bus_width)
-{
-	struct mmc *mmc;
-
-	mmc = &mmc_dev[dev_index];
-
-	sprintf(mmc->name, "SAMSUNG SD/MMC");
-	mmc->priv = &mmc_host[dev_index];
-	mmc->send_cmd = mmc_send_cmd;
-	mmc->set_ios = mmc_set_ios;
-	mmc->init = mmc_core_init;
-	mmc->getcd = NULL;
-
-	mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
-	if (bus_width == 8)
-		mmc->host_caps = MMC_MODE_8BIT;
-	else
-		mmc->host_caps = MMC_MODE_4BIT;
-	mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS | MMC_MODE_HC;
-
-	mmc->f_min = 400000;
-	mmc->f_max = 52000000;
-
-	mmc_host[dev_index].dev_index = dev_index;
-	mmc_host[dev_index].clock = 0;
-	mmc_host[dev_index].reg = s5p_get_base_mmc(dev_index);
-	mmc->b_max = 0;
-	mmc_register(mmc);
-
-	return 0;
-}
-
-int s5p_mmc_init(int dev_index, int bus_width)
-{
-	return s5p_mmc_initialize(dev_index, bus_width);
-}
diff --git a/drivers/mmc/s5p_sdhci.c b/drivers/mmc/s5p_sdhci.c
new file mode 100644
index 0000000..1d4481b
--- /dev/null
+++ b/drivers/mmc/s5p_sdhci.c
@@ -0,0 +1,98 @@
+/*
+ * (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
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <sdhci.h>
+#include <asm/arch/mmc.h>
+
+static char *S5P_NAME = "SAMSUNG SDHCI";
+static void s5p_sdhci_set_control_reg(struct sdhci_host *host)
+{
+	unsigned long val, ctrl;
+	/*
+	 * SELCLKPADDS[17:16]
+	 * 00 = 2mA
+	 * 01 = 4mA
+	 * 10 = 7mA
+	 * 11 = 9mA
+	 */
+	sdhci_writel(host, SDHCI_CTRL4_DRIVE_MASK(0x3), SDHCI_CONTROL4);
+
+	val = sdhci_readl(host, SDHCI_CONTROL2);
+	val &= SDHCI_CTRL2_SELBASECLK_SHIFT;
+
+	val |=	SDHCI_CTRL2_ENSTAASYNCCLR |
+		SDHCI_CTRL2_ENCMDCNFMSK |
+		SDHCI_CTRL2_ENFBCLKRX |
+		SDHCI_CTRL2_ENCLKOUTHOLD;
+
+	sdhci_writel(host, val, SDHCI_CONTROL2);
+
+	/*
+	 * FCSEL3[31] FCSEL2[23] FCSEL1[15] FCSEL0[7]
+	 * FCSel[1:0] : Rx Feedback Clock Delay Control
+	 *	Inverter delay means10ns delay if SDCLK 50MHz setting
+	 *	01 = Delay1 (basic delay)
+	 *	11 = Delay2 (basic delay + 2ns)
+	 *	00 = Delay3 (inverter delay)
+	 *	10 = Delay4 (inverter delay + 2ns)
+	 */
+	val = SDHCI_CTRL3_FCSEL3 | SDHCI_CTRL3_FCSEL1;
+	sdhci_writel(host, val, SDHCI_CONTROL3);
+
+	/*
+	 * SELBASECLK[5:4]
+	 * 00/01 = HCLK
+	 * 10 = EPLL
+	 * 11 = XTI or XEXTCLK
+	 */
+	ctrl = sdhci_readl(host, SDHCI_CONTROL2);
+	ctrl &= ~SDHCI_CTRL2_SELBASECLK_MASK(0x3);
+	ctrl |= SDHCI_CTRL2_SELBASECLK_MASK(0x2);
+	sdhci_writel(host, ctrl, SDHCI_CONTROL2);
+}
+
+int s5p_sdhci_init(u32 regbase, u32 max_clk, u32 min_clk, u32 quirks)
+{
+	struct sdhci_host *host = NULL;
+	host = (struct sdhci_host *)malloc(sizeof(struct sdhci_host));
+	if (!host) {
+		printf("sdhci__host malloc fail!\n");
+		return 1;
+	}
+
+	host->name = S5P_NAME;
+	host->ioaddr = (void *)regbase;
+	host->quirks = quirks;
+
+	host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_BROKEN_VOLTAGE;
+	host->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
+	if (quirks & SDHCI_QUIRK_REG32_RW)
+		host->version = sdhci_readl(host, SDHCI_HOST_VERSION - 2) >> 16;
+	else
+		host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
+
+	host->set_control_reg = &s5p_sdhci_set_control_reg;
+
+	host->host_caps = MMC_MODE_HC;
+
+	add_sdhci(host, max_clk, min_clk);
+	return 0;
+}