--- /dev/null
+/*
+ * (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;
+}
+
projects / u-boot / commitdiff