--- /dev/null
+/*
+ * Copyright 2007, Freescale Semiconductor, Inc
+ * Andy Fleming
+ *
+ * Based vaguely on the pxa mmc code:
+ * (C) Copyright 2003
+ * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
+ *
+ * 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; 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 <config.h>
+#include <common.h>
+#include <command.h>
+#include <mmc.h>
+#include <part.h>
+#include <malloc.h>
+#include <mmc.h>
+#include <fsl_esdhc.h>
+#include <asm/io.h>
+
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct fsl_esdhc {
+ uint dsaddr;
+ uint blkattr;
+ uint cmdarg;
+ uint xfertyp;
+ uint cmdrsp0;
+ uint cmdrsp1;
+ uint cmdrsp2;
+ uint cmdrsp3;
+ uint datport;
+ uint prsstat;
+ uint proctl;
+ uint sysctl;
+ uint irqstat;
+ uint irqstaten;
+ uint irqsigen;
+ uint autoc12err;
+ uint hostcapblt;
+ uint wml;
+ char reserved1[8];
+ uint fevt;
+ char reserved2[168];
+ uint hostver;
+ char reserved3[780];
+ uint scr;
+};
+
+/* Return the XFERTYP flags for a given command and data packet */
+uint esdhc_xfertyp(struct mmc_cmd *cmd, struct mmc_data *data)
+{
+ uint xfertyp = 0;
+
+ if (data) {
+ xfertyp |= XFERTYP_DPSEL | XFERTYP_DMAEN;
+
+ if (data->blocks > 1) {
+ xfertyp |= XFERTYP_MSBSEL;
+ xfertyp |= XFERTYP_BCEN;
+ }
+
+ if (data->flags & MMC_DATA_READ)
+ xfertyp |= XFERTYP_DTDSEL;
+ }
+
+ if (cmd->resp_type & MMC_RSP_CRC)
+ xfertyp |= XFERTYP_CCCEN;
+ if (cmd->resp_type & MMC_RSP_OPCODE)
+ xfertyp |= XFERTYP_CICEN;
+ if (cmd->resp_type & MMC_RSP_136)
+ xfertyp |= XFERTYP_RSPTYP_136;
+ else if (cmd->resp_type & MMC_RSP_BUSY)
+ xfertyp |= XFERTYP_RSPTYP_48_BUSY;
+ else if (cmd->resp_type & MMC_RSP_PRESENT)
+ xfertyp |= XFERTYP_RSPTYP_48;
+
+ return XFERTYP_CMD(cmd->cmdidx) | xfertyp;
+}
+
+static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
+{
+ uint wml_value;
+ int timeout;
+ struct fsl_esdhc *regs = mmc->priv;
+
+ wml_value = data->blocksize/4;
+
+ if (data->flags & MMC_DATA_READ) {
+ if (wml_value > 0x10)
+ wml_value = 0x10;
+
+ wml_value = 0x100000 | wml_value;
+
+ out_be32(®s->dsaddr, (u32)data->dest);
+ } else {
+ if (wml_value > 0x80)
+ wml_value = 0x80;
+ if ((in_be32(®s->prsstat) & PRSSTAT_WPSPL) == 0) {
+ printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
+ return TIMEOUT;
+ }
+ wml_value = wml_value << 16 | 0x10;
+ out_be32(®s->dsaddr, (u32)data->src);
+ }
+
+ out_be32(®s->wml, wml_value);
+
+ out_be32(®s->blkattr, data->blocks << 16 | data->blocksize);
+
+ /* Calculate the timeout period for data transactions */
+ timeout = __ilog2(mmc->tran_speed/10);
+ timeout -= 13;
+
+ if (timeout > 14)
+ timeout = 14;
+
+ if (timeout < 0)
+ timeout = 0;
+
+ clrsetbits_be32(®s->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
+
+ return 0;
+}
+
+
+/*
+ * Sends a command out on the bus. Takes the mmc pointer,
+ * a command pointer, and an optional data pointer.
+ */
+static int
+esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
+{
+ uint xfertyp;
+ uint irqstat;
+ volatile struct fsl_esdhc *regs = mmc->priv;
+
+ out_be32(®s->irqstat, -1);
+
+ sync();
+
+ /* Wait for the bus to be idle */
+ while ((in_be32(®s->prsstat) & PRSSTAT_CICHB) ||
+ (in_be32(®s->prsstat) & PRSSTAT_CIDHB));
+
+ while (in_be32(®s->prsstat) & PRSSTAT_DLA);
+
+ /* Wait at least 8 SD clock cycles before the next command */
+ /*
+ * Note: This is way more than 8 cycles, but 1ms seems to
+ * resolve timing issues with some cards
+ */
+ udelay(1000);
+
+ /* Set up for a data transfer if we have one */
+ if (data) {
+ int err;
+
+ err = esdhc_setup_data(mmc, data);
+ if(err)
+ return err;
+ }
+
+ /* Figure out the transfer arguments */
+ xfertyp = esdhc_xfertyp(cmd, data);
+
+ /* Send the command */
+ out_be32(®s->cmdarg, cmd->cmdarg);
+ out_be32(®s->xfertyp, xfertyp);
+
+ /* Wait for the command to complete */
+ while (!(in_be32(®s->irqstat) & IRQSTAT_CC));
+
+ irqstat = in_be32(®s->irqstat);
+ out_be32(®s->irqstat, irqstat);
+
+ if (irqstat & CMD_ERR)
+ return COMM_ERR;
+
+ if (irqstat & IRQSTAT_CTOE)
+ return TIMEOUT;
+
+ /* Copy the response to the response buffer */
+ if (cmd->resp_type & MMC_RSP_136) {
+ u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
+
+ cmdrsp3 = in_be32(®s->cmdrsp3);
+ cmdrsp2 = in_be32(®s->cmdrsp2);
+ cmdrsp1 = in_be32(®s->cmdrsp1);
+ cmdrsp0 = in_be32(®s->cmdrsp0);
+ ((uint *)(cmd->response))[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
+ ((uint *)(cmd->response))[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
+ ((uint *)(cmd->response))[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
+ ((uint *)(cmd->response))[3] = (cmdrsp0 << 8);
+ } else
+ ((uint *)(cmd->response))[0] = in_be32(®s->cmdrsp0);
+
+ /* Wait until all of the blocks are transferred */
+ if (data) {
+ do {
+ irqstat = in_be32(®s->irqstat);
+
+ if (irqstat & DATA_ERR)
+ return COMM_ERR;
+
+ if (irqstat & IRQSTAT_DTOE)
+ return TIMEOUT;
+ } while (!(irqstat & IRQSTAT_TC) &&
+ (in_be32(®s->prsstat) & PRSSTAT_DLA));
+ }
+
+ out_be32(®s->irqstat, -1);
+
+ return 0;
+}
+
+void set_sysctl(struct mmc *mmc, uint clock)
+{
+ int sdhc_clk = gd->sdhc_clk;
+ int div, pre_div;
+ volatile struct fsl_esdhc *regs = mmc->priv;
+ uint clk;
+
+ if (sdhc_clk / 16 > clock) {
+ for (pre_div = 2; pre_div < 256; pre_div *= 2)
+ if ((sdhc_clk / pre_div) <= (clock * 16))
+ break;
+ } else
+ pre_div = 2;
+
+ for (div = 1; div <= 16; div++)
+ if ((sdhc_clk / (div * pre_div)) <= clock)
+ break;
+
+ pre_div >>= 1;
+ div -= 1;
+
+ clk = (pre_div << 8) | (div << 4);
+
+ clrsetbits_be32(®s->sysctl, SYSCTL_CLOCK_MASK, clk);
+
+ udelay(10000);
+
+ setbits_be32(®s->sysctl, SYSCTL_PEREN);
+}
+
+static void esdhc_set_ios(struct mmc *mmc)
+{
+ struct fsl_esdhc *regs = mmc->priv;
+
+ /* Set the clock speed */
+ set_sysctl(mmc, mmc->clock);
+
+ /* Set the bus width */
+ clrbits_be32(®s->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
+
+ if (mmc->bus_width == 4)
+ setbits_be32(®s->proctl, PROCTL_DTW_4);
+ else if (mmc->bus_width == 8)
+ setbits_be32(®s->proctl, PROCTL_DTW_8);
+}
+
+static int esdhc_init(struct mmc *mmc)
+{
+ struct fsl_esdhc *regs = mmc->priv;
+ int timeout = 1000;
+
+ /* Enable cache snooping */
+ out_be32(®s->scr, 0x00000040);
+
+ out_be32(®s->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
+
+ /* Set the initial clock speed */
+ set_sysctl(mmc, 400000);
+
+ /* Disable the BRR and BWR bits in IRQSTAT */
+ clrbits_be32(®s->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
+
+ /* Put the PROCTL reg back to the default */
+ out_be32(®s->proctl, PROCTL_INIT);
+
+ while (!(in_be32(®s->prsstat) & PRSSTAT_CINS) && --timeout)
+ udelay(1000);
+
+ if (timeout <= 0)
+ return NO_CARD_ERR;
+
+ return 0;
+}
+
+static int esdhc_initialize(bd_t *bis)
+{
+ struct fsl_esdhc *regs = (struct fsl_esdhc *)CONFIG_SYS_FSL_ESDHC_ADDR;
+ struct mmc *mmc;
+ u32 caps;
+
+ mmc = malloc(sizeof(struct mmc));
+
+ sprintf(mmc->name, "FSL_ESDHC");
+ mmc->priv = regs;
+ mmc->send_cmd = esdhc_send_cmd;
+ mmc->set_ios = esdhc_set_ios;
+ mmc->init = esdhc_init;
+
+ caps = regs->hostcapblt;
+
+ if (caps & ESDHC_HOSTCAPBLT_VS18)
+ mmc->voltages |= MMC_VDD_165_195;
+ if (caps & ESDHC_HOSTCAPBLT_VS30)
+ mmc->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31;
+ if (caps & ESDHC_HOSTCAPBLT_VS33)
+ mmc->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34;
+
+ mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT;
+
+ if (caps & ESDHC_HOSTCAPBLT_HSS)
+ mmc->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
+
+ mmc->f_min = 400000;
+ mmc->f_max = MIN(gd->sdhc_clk, 50000000);
+
+ mmc_register(mmc);
+
+ return 0;
+}
+
+int fsl_esdhc_mmc_init(bd_t *bis)
+{
+ return esdhc_initialize(bis);
+}
--- /dev/null
+/*
+ * FSL SD/MMC Defines
+ *-------------------------------------------------------------------
+ *
+ * Copyright 2007-2008, Freescale Semiconductor, Inc
+ *
+ * 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 __FSL_ESDHC_H__
+#define __FSL_ESDHC_H__
+
+/* FSL eSDHC-specific constants */
+#define SYSCTL 0x0002e02c
+#define SYSCTL_INITA 0x08000000
+#define SYSCTL_TIMEOUT_MASK 0x000f0000
+#define SYSCTL_CLOCK_MASK 0x00000fff
+#define SYSCTL_PEREN 0x00000004
+#define SYSCTL_HCKEN 0x00000002
+#define SYSCTL_IPGEN 0x00000001
+
+#define IRQSTAT 0x0002e030
+#define IRQSTAT_DMAE (0x10000000)
+#define IRQSTAT_AC12E (0x01000000)
+#define IRQSTAT_DEBE (0x00400000)
+#define IRQSTAT_DCE (0x00200000)
+#define IRQSTAT_DTOE (0x00100000)
+#define IRQSTAT_CIE (0x00080000)
+#define IRQSTAT_CEBE (0x00040000)
+#define IRQSTAT_CCE (0x00020000)
+#define IRQSTAT_CTOE (0x00010000)
+#define IRQSTAT_CINT (0x00000100)
+#define IRQSTAT_CRM (0x00000080)
+#define IRQSTAT_CINS (0x00000040)
+#define IRQSTAT_BRR (0x00000020)
+#define IRQSTAT_BWR (0x00000010)
+#define IRQSTAT_DINT (0x00000008)
+#define IRQSTAT_BGE (0x00000004)
+#define IRQSTAT_TC (0x00000002)
+#define IRQSTAT_CC (0x00000001)
+
+#define CMD_ERR (IRQSTAT_CIE | IRQSTAT_CEBE | IRQSTAT_CCE)
+#define DATA_ERR (IRQSTAT_DEBE | IRQSTAT_DCE | IRQSTAT_DTOE)
+
+#define IRQSTATEN 0x0002e034
+#define IRQSTATEN_DMAE (0x10000000)
+#define IRQSTATEN_AC12E (0x01000000)
+#define IRQSTATEN_DEBE (0x00400000)
+#define IRQSTATEN_DCE (0x00200000)
+#define IRQSTATEN_DTOE (0x00100000)
+#define IRQSTATEN_CIE (0x00080000)
+#define IRQSTATEN_CEBE (0x00040000)
+#define IRQSTATEN_CCE (0x00020000)
+#define IRQSTATEN_CTOE (0x00010000)
+#define IRQSTATEN_CINT (0x00000100)
+#define IRQSTATEN_CRM (0x00000080)
+#define IRQSTATEN_CINS (0x00000040)
+#define IRQSTATEN_BRR (0x00000020)
+#define IRQSTATEN_BWR (0x00000010)
+#define IRQSTATEN_DINT (0x00000008)
+#define IRQSTATEN_BGE (0x00000004)
+#define IRQSTATEN_TC (0x00000002)
+#define IRQSTATEN_CC (0x00000001)
+
+#define PRSSTAT 0x0002e024
+#define PRSSTAT_CLSL (0x00800000)
+#define PRSSTAT_WPSPL (0x00080000)
+#define PRSSTAT_CDPL (0x00040000)
+#define PRSSTAT_CINS (0x00010000)
+#define PRSSTAT_BREN (0x00000800)
+#define PRSSTAT_DLA (0x00000004)
+#define PRSSTAT_CICHB (0x00000002)
+#define PRSSTAT_CIDHB (0x00000001)
+
+#define PROCTL 0x0002e028
+#define PROCTL_INIT 0x00000020
+#define PROCTL_DTW_4 0x00000002
+#define PROCTL_DTW_8 0x00000004
+
+#define CMDARG 0x0002e008
+
+#define XFERTYP 0x0002e00c
+#define XFERTYP_CMD(x) ((x & 0x3f) << 24)
+#define XFERTYP_CMDTYP_NORMAL 0x0
+#define XFERTYP_CMDTYP_SUSPEND 0x00400000
+#define XFERTYP_CMDTYP_RESUME 0x00800000
+#define XFERTYP_CMDTYP_ABORT 0x00c00000
+#define XFERTYP_DPSEL 0x00200000
+#define XFERTYP_CICEN 0x00100000
+#define XFERTYP_CCCEN 0x00080000
+#define XFERTYP_RSPTYP_NONE 0
+#define XFERTYP_RSPTYP_136 0x00010000
+#define XFERTYP_RSPTYP_48 0x00020000
+#define XFERTYP_RSPTYP_48_BUSY 0x00030000
+#define XFERTYP_MSBSEL 0x00000020
+#define XFERTYP_DTDSEL 0x00000010
+#define XFERTYP_AC12EN 0x00000004
+#define XFERTYP_BCEN 0x00000002
+#define XFERTYP_DMAEN 0x00000001
+
+#define CINS_TIMEOUT 1000
+
+#define DSADDR 0x2e004
+
+#define CMDRSP0 0x2e010
+#define CMDRSP1 0x2e014
+#define CMDRSP2 0x2e018
+#define CMDRSP3 0x2e01c
+
+#define DATPORT 0x2e020
+
+#define WML 0x2e044
+#define WML_WRITE 0x00010000
+
+#define BLKATTR 0x2e004
+#define BLKATTR_CNT(x) ((x & 0xffff) << 16)
+#define BLKATTR_SIZE(x) (x & 0x1fff)
+#define MAX_BLK_CNT 0x7fff /* so malloc will have enough room with 32M */
+
+#define ESDHC_HOSTCAPBLT_VS18 0x04000000
+#define ESDHC_HOSTCAPBLT_VS30 0x02000000
+#define ESDHC_HOSTCAPBLT_VS33 0x01000000
+#define ESDHC_HOSTCAPBLT_SRS 0x00800000
+#define ESDHC_HOSTCAPBLT_DMAS 0x00400000
+#define ESDHC_HOSTCAPBLT_HSS 0x00200000
+
+int fsl_esdhc_mmc_init(bd_t *bis);
+
+#endif /* __FSL_ESDHC_H__ */
projects / u-boot / commitdiff