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![Andy Fleming](/assets/img/avatar_default.png)
At some point, a confusion arose about the use of the bit definitions in host_caps for bus widths, and the value in ext_csd. By coincidence, a simple shift could convert between one and the other: MMC_MODE_1BIT = 0, EXT_CSD_BUS_WIDTH_1 = 0 MMC_MODE_4BIT = 0x100, EXT_CSD_BUS_WIDTH_4 = 1 MMC_MODE_8BIT = 0x200, EXT_CSD_BUS_WIDTH_8 = 2 However, as host_caps is a bitmask of supported things, there is not, in fact, a one-to-one correspondence. host_caps is capable of containing MODE_4BIT | MODE_8BIT, so nonsensical things were happening where we would try to set the bus width to 12. The new code clarifies the very different namespaces: host_caps/card_caps = bitmask (MMC_MODE_*) ext CSD fields are just an index (EXT_CSD_BUS_WIDTH_*) mmc->bus_width integer number of bits (1, 4, 8) We create arrays to map between the namespaces, like in Linux. Signed-off-by: Andy Fleming <afleming@freescale.com> Tested-by: Jaehoon Chung <jh80.chung@samsung.com> Tested-by: Stephen Warren <swarren@nvidia.com>
1330 lines
28 KiB
C
1330 lines
28 KiB
C
/*
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* Copyright 2008, Freescale Semiconductor, Inc
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* Andy Fleming
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*
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* Based vaguely on the Linux code
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <config.h>
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#include <common.h>
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#include <command.h>
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#include <mmc.h>
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#include <part.h>
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#include <malloc.h>
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#include <linux/list.h>
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#include <div64.h>
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/* Set block count limit because of 16 bit register limit on some hardware*/
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#ifndef CONFIG_SYS_MMC_MAX_BLK_COUNT
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#define CONFIG_SYS_MMC_MAX_BLK_COUNT 65535
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#endif
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static struct list_head mmc_devices;
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static int cur_dev_num = -1;
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int __board_mmc_getcd(struct mmc *mmc) {
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return -1;
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}
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int board_mmc_getcd(struct mmc *mmc)__attribute__((weak,
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alias("__board_mmc_getcd")));
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static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
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struct mmc_data *data)
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{
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struct mmc_data backup;
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int ret;
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memset(&backup, 0, sizeof(backup));
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#ifdef CONFIG_MMC_TRACE
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int i;
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u8 *ptr;
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printf("CMD_SEND:%d\n", cmd->cmdidx);
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printf("\t\tARG\t\t\t 0x%08X\n", cmd->cmdarg);
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ret = mmc->send_cmd(mmc, cmd, data);
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switch (cmd->resp_type) {
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case MMC_RSP_NONE:
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printf("\t\tMMC_RSP_NONE\n");
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break;
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case MMC_RSP_R1:
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printf("\t\tMMC_RSP_R1,5,6,7 \t 0x%08X \n",
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cmd->response[0]);
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break;
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case MMC_RSP_R1b:
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printf("\t\tMMC_RSP_R1b\t\t 0x%08X \n",
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cmd->response[0]);
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break;
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case MMC_RSP_R2:
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printf("\t\tMMC_RSP_R2\t\t 0x%08X \n",
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cmd->response[0]);
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printf("\t\t \t\t 0x%08X \n",
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cmd->response[1]);
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printf("\t\t \t\t 0x%08X \n",
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cmd->response[2]);
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printf("\t\t \t\t 0x%08X \n",
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cmd->response[3]);
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printf("\n");
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printf("\t\t\t\t\tDUMPING DATA\n");
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for (i = 0; i < 4; i++) {
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int j;
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printf("\t\t\t\t\t%03d - ", i*4);
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ptr = (u8 *)&cmd->response[i];
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ptr += 3;
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for (j = 0; j < 4; j++)
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printf("%02X ", *ptr--);
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printf("\n");
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}
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break;
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case MMC_RSP_R3:
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printf("\t\tMMC_RSP_R3,4\t\t 0x%08X \n",
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cmd->response[0]);
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break;
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default:
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printf("\t\tERROR MMC rsp not supported\n");
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break;
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}
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#else
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ret = mmc->send_cmd(mmc, cmd, data);
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#endif
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return ret;
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}
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static int mmc_send_status(struct mmc *mmc, int timeout)
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{
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struct mmc_cmd cmd;
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int err, retries = 5;
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#ifdef CONFIG_MMC_TRACE
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int status;
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#endif
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cmd.cmdidx = MMC_CMD_SEND_STATUS;
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cmd.resp_type = MMC_RSP_R1;
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if (!mmc_host_is_spi(mmc))
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cmd.cmdarg = mmc->rca << 16;
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do {
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (!err) {
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if ((cmd.response[0] & MMC_STATUS_RDY_FOR_DATA) &&
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(cmd.response[0] & MMC_STATUS_CURR_STATE) !=
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MMC_STATE_PRG)
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break;
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else if (cmd.response[0] & MMC_STATUS_MASK) {
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printf("Status Error: 0x%08X\n",
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cmd.response[0]);
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return COMM_ERR;
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}
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} else if (--retries < 0)
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return err;
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udelay(1000);
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} while (timeout--);
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#ifdef CONFIG_MMC_TRACE
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status = (cmd.response[0] & MMC_STATUS_CURR_STATE) >> 9;
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printf("CURR STATE:%d\n", status);
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#endif
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if (timeout <= 0) {
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printf("Timeout waiting card ready\n");
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return TIMEOUT;
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}
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return 0;
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}
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static int mmc_set_blocklen(struct mmc *mmc, int len)
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{
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struct mmc_cmd cmd;
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cmd.cmdidx = MMC_CMD_SET_BLOCKLEN;
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cmd.resp_type = MMC_RSP_R1;
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cmd.cmdarg = len;
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return mmc_send_cmd(mmc, &cmd, NULL);
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}
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struct mmc *find_mmc_device(int dev_num)
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{
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struct mmc *m;
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struct list_head *entry;
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list_for_each(entry, &mmc_devices) {
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m = list_entry(entry, struct mmc, link);
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if (m->block_dev.dev == dev_num)
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return m;
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}
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printf("MMC Device %d not found\n", dev_num);
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return NULL;
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}
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static ulong mmc_erase_t(struct mmc *mmc, ulong start, lbaint_t blkcnt)
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{
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struct mmc_cmd cmd;
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ulong end;
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int err, start_cmd, end_cmd;
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if (mmc->high_capacity)
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end = start + blkcnt - 1;
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else {
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end = (start + blkcnt - 1) * mmc->write_bl_len;
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start *= mmc->write_bl_len;
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}
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if (IS_SD(mmc)) {
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start_cmd = SD_CMD_ERASE_WR_BLK_START;
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end_cmd = SD_CMD_ERASE_WR_BLK_END;
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} else {
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start_cmd = MMC_CMD_ERASE_GROUP_START;
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end_cmd = MMC_CMD_ERASE_GROUP_END;
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}
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cmd.cmdidx = start_cmd;
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cmd.cmdarg = start;
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cmd.resp_type = MMC_RSP_R1;
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (err)
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goto err_out;
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cmd.cmdidx = end_cmd;
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cmd.cmdarg = end;
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (err)
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goto err_out;
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cmd.cmdidx = MMC_CMD_ERASE;
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cmd.cmdarg = SECURE_ERASE;
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cmd.resp_type = MMC_RSP_R1b;
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (err)
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goto err_out;
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return 0;
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err_out:
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puts("mmc erase failed\n");
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return err;
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}
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static unsigned long
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mmc_berase(int dev_num, unsigned long start, lbaint_t blkcnt)
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{
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int err = 0;
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struct mmc *mmc = find_mmc_device(dev_num);
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lbaint_t blk = 0, blk_r = 0;
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int timeout = 1000;
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if (!mmc)
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return -1;
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if ((start % mmc->erase_grp_size) || (blkcnt % mmc->erase_grp_size))
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printf("\n\nCaution! Your devices Erase group is 0x%x\n"
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"The erase range would be change to 0x%lx~0x%lx\n\n",
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mmc->erase_grp_size, start & ~(mmc->erase_grp_size - 1),
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((start + blkcnt + mmc->erase_grp_size)
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& ~(mmc->erase_grp_size - 1)) - 1);
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while (blk < blkcnt) {
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blk_r = ((blkcnt - blk) > mmc->erase_grp_size) ?
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mmc->erase_grp_size : (blkcnt - blk);
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err = mmc_erase_t(mmc, start + blk, blk_r);
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if (err)
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break;
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blk += blk_r;
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/* Waiting for the ready status */
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if (mmc_send_status(mmc, timeout))
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return 0;
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}
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return blk;
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}
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static ulong
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mmc_write_blocks(struct mmc *mmc, ulong start, lbaint_t blkcnt, const void*src)
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{
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struct mmc_cmd cmd;
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struct mmc_data data;
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int timeout = 1000;
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if ((start + blkcnt) > mmc->block_dev.lba) {
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printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
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start + blkcnt, mmc->block_dev.lba);
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return 0;
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}
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if (blkcnt > 1)
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cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
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else
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cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
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if (mmc->high_capacity)
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cmd.cmdarg = start;
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else
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cmd.cmdarg = start * mmc->write_bl_len;
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cmd.resp_type = MMC_RSP_R1;
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data.src = src;
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data.blocks = blkcnt;
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data.blocksize = mmc->write_bl_len;
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data.flags = MMC_DATA_WRITE;
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if (mmc_send_cmd(mmc, &cmd, &data)) {
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printf("mmc write failed\n");
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return 0;
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}
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/* SPI multiblock writes terminate using a special
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* token, not a STOP_TRANSMISSION request.
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*/
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if (!mmc_host_is_spi(mmc) && blkcnt > 1) {
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cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
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cmd.cmdarg = 0;
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cmd.resp_type = MMC_RSP_R1b;
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if (mmc_send_cmd(mmc, &cmd, NULL)) {
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printf("mmc fail to send stop cmd\n");
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return 0;
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}
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}
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/* Waiting for the ready status */
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if (mmc_send_status(mmc, timeout))
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return 0;
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return blkcnt;
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}
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static ulong
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mmc_bwrite(int dev_num, ulong start, lbaint_t blkcnt, const void*src)
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{
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lbaint_t cur, blocks_todo = blkcnt;
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struct mmc *mmc = find_mmc_device(dev_num);
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if (!mmc)
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return 0;
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if (mmc_set_blocklen(mmc, mmc->write_bl_len))
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return 0;
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do {
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cur = (blocks_todo > mmc->b_max) ? mmc->b_max : blocks_todo;
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if(mmc_write_blocks(mmc, start, cur, src) != cur)
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return 0;
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blocks_todo -= cur;
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start += cur;
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src += cur * mmc->write_bl_len;
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} while (blocks_todo > 0);
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return blkcnt;
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}
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static int mmc_read_blocks(struct mmc *mmc, void *dst, ulong start,
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lbaint_t blkcnt)
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{
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struct mmc_cmd cmd;
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struct mmc_data data;
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if (blkcnt > 1)
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cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK;
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else
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cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK;
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if (mmc->high_capacity)
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cmd.cmdarg = start;
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else
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cmd.cmdarg = start * mmc->read_bl_len;
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cmd.resp_type = MMC_RSP_R1;
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data.dest = dst;
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data.blocks = blkcnt;
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data.blocksize = mmc->read_bl_len;
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data.flags = MMC_DATA_READ;
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if (mmc_send_cmd(mmc, &cmd, &data))
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return 0;
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if (blkcnt > 1) {
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cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
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cmd.cmdarg = 0;
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cmd.resp_type = MMC_RSP_R1b;
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if (mmc_send_cmd(mmc, &cmd, NULL)) {
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printf("mmc fail to send stop cmd\n");
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return 0;
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}
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}
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return blkcnt;
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}
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static ulong mmc_bread(int dev_num, ulong start, lbaint_t blkcnt, void *dst)
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{
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lbaint_t cur, blocks_todo = blkcnt;
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if (blkcnt == 0)
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return 0;
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struct mmc *mmc = find_mmc_device(dev_num);
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if (!mmc)
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return 0;
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if ((start + blkcnt) > mmc->block_dev.lba) {
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printf("MMC: block number 0x%lx exceeds max(0x%lx)\n",
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start + blkcnt, mmc->block_dev.lba);
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return 0;
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}
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if (mmc_set_blocklen(mmc, mmc->read_bl_len))
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return 0;
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do {
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cur = (blocks_todo > mmc->b_max) ? mmc->b_max : blocks_todo;
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if(mmc_read_blocks(mmc, dst, start, cur) != cur)
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return 0;
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blocks_todo -= cur;
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start += cur;
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dst += cur * mmc->read_bl_len;
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} while (blocks_todo > 0);
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return blkcnt;
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}
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static int mmc_go_idle(struct mmc *mmc)
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{
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struct mmc_cmd cmd;
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int err;
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udelay(1000);
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cmd.cmdidx = MMC_CMD_GO_IDLE_STATE;
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cmd.cmdarg = 0;
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cmd.resp_type = MMC_RSP_NONE;
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (err)
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return err;
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udelay(2000);
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return 0;
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}
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static int sd_send_op_cond(struct mmc *mmc)
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{
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int timeout = 1000;
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int err;
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struct mmc_cmd cmd;
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do {
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cmd.cmdidx = MMC_CMD_APP_CMD;
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cmd.resp_type = MMC_RSP_R1;
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cmd.cmdarg = 0;
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (err)
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return err;
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cmd.cmdidx = SD_CMD_APP_SEND_OP_COND;
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cmd.resp_type = MMC_RSP_R3;
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/*
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* Most cards do not answer if some reserved bits
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* in the ocr are set. However, Some controller
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* can set bit 7 (reserved for low voltages), but
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* how to manage low voltages SD card is not yet
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* specified.
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*/
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cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 :
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(mmc->voltages & 0xff8000);
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if (mmc->version == SD_VERSION_2)
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cmd.cmdarg |= OCR_HCS;
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err = mmc_send_cmd(mmc, &cmd, NULL);
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if (err)
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return err;
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|
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udelay(1000);
|
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} while ((!(cmd.response[0] & OCR_BUSY)) && timeout--);
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|
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if (timeout <= 0)
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return UNUSABLE_ERR;
|
|
|
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if (mmc->version != SD_VERSION_2)
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mmc->version = SD_VERSION_1_0;
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|
|
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if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
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cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
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cmd.resp_type = MMC_RSP_R3;
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cmd.cmdarg = 0;
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|
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err = mmc_send_cmd(mmc, &cmd, NULL);
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|
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if (err)
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return err;
|
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}
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|
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mmc->ocr = cmd.response[0];
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|
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mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
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mmc->rca = 0;
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|
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return 0;
|
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}
|
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|
|
static int mmc_send_op_cond(struct mmc *mmc)
|
|
{
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int timeout = 10000;
|
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struct mmc_cmd cmd;
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int err;
|
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|
|
/* Some cards seem to need this */
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mmc_go_idle(mmc);
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|
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/* Asking to the card its capabilities */
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|
cmd.cmdidx = MMC_CMD_SEND_OP_COND;
|
|
cmd.resp_type = MMC_RSP_R3;
|
|
cmd.cmdarg = 0;
|
|
|
|
err = mmc_send_cmd(mmc, &cmd, NULL);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
udelay(1000);
|
|
|
|
do {
|
|
cmd.cmdidx = MMC_CMD_SEND_OP_COND;
|
|
cmd.resp_type = MMC_RSP_R3;
|
|
cmd.cmdarg = (mmc_host_is_spi(mmc) ? 0 :
|
|
(mmc->voltages &
|
|
(cmd.response[0] & OCR_VOLTAGE_MASK)) |
|
|
(cmd.response[0] & OCR_ACCESS_MODE));
|
|
|
|
if (mmc->host_caps & MMC_MODE_HC)
|
|
cmd.cmdarg |= OCR_HCS;
|
|
|
|
err = mmc_send_cmd(mmc, &cmd, NULL);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
udelay(1000);
|
|
} while (!(cmd.response[0] & OCR_BUSY) && timeout--);
|
|
|
|
if (timeout <= 0)
|
|
return UNUSABLE_ERR;
|
|
|
|
if (mmc_host_is_spi(mmc)) { /* read OCR for spi */
|
|
cmd.cmdidx = MMC_CMD_SPI_READ_OCR;
|
|
cmd.resp_type = MMC_RSP_R3;
|
|
cmd.cmdarg = 0;
|
|
|
|
err = mmc_send_cmd(mmc, &cmd, NULL);
|
|
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
mmc->version = MMC_VERSION_UNKNOWN;
|
|
mmc->ocr = cmd.response[0];
|
|
|
|
mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
|
|
mmc->rca = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd)
|
|
{
|
|
struct mmc_cmd cmd;
|
|
struct mmc_data data;
|
|
int err;
|
|
|
|
/* Get the Card Status Register */
|
|
cmd.cmdidx = MMC_CMD_SEND_EXT_CSD;
|
|
cmd.resp_type = MMC_RSP_R1;
|
|
cmd.cmdarg = 0;
|
|
|
|
data.dest = (char *)ext_csd;
|
|
data.blocks = 1;
|
|
data.blocksize = 512;
|
|
data.flags = MMC_DATA_READ;
|
|
|
|
err = mmc_send_cmd(mmc, &cmd, &data);
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
static int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value)
|
|
{
|
|
struct mmc_cmd cmd;
|
|
int timeout = 1000;
|
|
int ret;
|
|
|
|
cmd.cmdidx = MMC_CMD_SWITCH;
|
|
cmd.resp_type = MMC_RSP_R1b;
|
|
cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
|
|
(index << 16) |
|
|
(value << 8);
|
|
|
|
ret = mmc_send_cmd(mmc, &cmd, NULL);
|
|
|
|
/* Waiting for the ready status */
|
|
if (!ret)
|
|
ret = mmc_send_status(mmc, timeout);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
static int mmc_change_freq(struct mmc *mmc)
|
|
{
|
|
ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, 512);
|
|
char cardtype;
|
|
int err;
|
|
|
|
mmc->card_caps = 0;
|
|
|
|
if (mmc_host_is_spi(mmc))
|
|
return 0;
|
|
|
|
/* Only version 4 supports high-speed */
|
|
if (mmc->version < MMC_VERSION_4)
|
|
return 0;
|
|
|
|
err = mmc_send_ext_csd(mmc, ext_csd);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
cardtype = ext_csd[EXT_CSD_CARD_TYPE] & 0xf;
|
|
|
|
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
/* Now check to see that it worked */
|
|
err = mmc_send_ext_csd(mmc, ext_csd);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
/* No high-speed support */
|
|
if (!ext_csd[EXT_CSD_HS_TIMING])
|
|
return 0;
|
|
|
|
/* High Speed is set, there are two types: 52MHz and 26MHz */
|
|
if (cardtype & MMC_HS_52MHZ)
|
|
mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
|
|
else
|
|
mmc->card_caps |= MMC_MODE_HS;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mmc_switch_part(int dev_num, unsigned int part_num)
|
|
{
|
|
struct mmc *mmc = find_mmc_device(dev_num);
|
|
|
|
if (!mmc)
|
|
return -1;
|
|
|
|
return mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
|
|
(mmc->part_config & ~PART_ACCESS_MASK)
|
|
| (part_num & PART_ACCESS_MASK));
|
|
}
|
|
|
|
int mmc_getcd(struct mmc *mmc)
|
|
{
|
|
int cd;
|
|
|
|
cd = board_mmc_getcd(mmc);
|
|
|
|
if ((cd < 0) && mmc->getcd)
|
|
cd = mmc->getcd(mmc);
|
|
|
|
return cd;
|
|
}
|
|
|
|
static int sd_switch(struct mmc *mmc, int mode, int group, u8 value, u8 *resp)
|
|
{
|
|
struct mmc_cmd cmd;
|
|
struct mmc_data data;
|
|
|
|
/* Switch the frequency */
|
|
cmd.cmdidx = SD_CMD_SWITCH_FUNC;
|
|
cmd.resp_type = MMC_RSP_R1;
|
|
cmd.cmdarg = (mode << 31) | 0xffffff;
|
|
cmd.cmdarg &= ~(0xf << (group * 4));
|
|
cmd.cmdarg |= value << (group * 4);
|
|
|
|
data.dest = (char *)resp;
|
|
data.blocksize = 64;
|
|
data.blocks = 1;
|
|
data.flags = MMC_DATA_READ;
|
|
|
|
return mmc_send_cmd(mmc, &cmd, &data);
|
|
}
|
|
|
|
|
|
static int sd_change_freq(struct mmc *mmc)
|
|
{
|
|
int err;
|
|
struct mmc_cmd cmd;
|
|
ALLOC_CACHE_ALIGN_BUFFER(uint, scr, 2);
|
|
ALLOC_CACHE_ALIGN_BUFFER(uint, switch_status, 16);
|
|
struct mmc_data data;
|
|
int timeout;
|
|
|
|
mmc->card_caps = 0;
|
|
|
|
if (mmc_host_is_spi(mmc))
|
|
return 0;
|
|
|
|
/* Read the SCR to find out if this card supports higher speeds */
|
|
cmd.cmdidx = MMC_CMD_APP_CMD;
|
|
cmd.resp_type = MMC_RSP_R1;
|
|
cmd.cmdarg = mmc->rca << 16;
|
|
|
|
err = mmc_send_cmd(mmc, &cmd, NULL);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
cmd.cmdidx = SD_CMD_APP_SEND_SCR;
|
|
cmd.resp_type = MMC_RSP_R1;
|
|
cmd.cmdarg = 0;
|
|
|
|
timeout = 3;
|
|
|
|
retry_scr:
|
|
data.dest = (char *)scr;
|
|
data.blocksize = 8;
|
|
data.blocks = 1;
|
|
data.flags = MMC_DATA_READ;
|
|
|
|
err = mmc_send_cmd(mmc, &cmd, &data);
|
|
|
|
if (err) {
|
|
if (timeout--)
|
|
goto retry_scr;
|
|
|
|
return err;
|
|
}
|
|
|
|
mmc->scr[0] = __be32_to_cpu(scr[0]);
|
|
mmc->scr[1] = __be32_to_cpu(scr[1]);
|
|
|
|
switch ((mmc->scr[0] >> 24) & 0xf) {
|
|
case 0:
|
|
mmc->version = SD_VERSION_1_0;
|
|
break;
|
|
case 1:
|
|
mmc->version = SD_VERSION_1_10;
|
|
break;
|
|
case 2:
|
|
mmc->version = SD_VERSION_2;
|
|
break;
|
|
default:
|
|
mmc->version = SD_VERSION_1_0;
|
|
break;
|
|
}
|
|
|
|
if (mmc->scr[0] & SD_DATA_4BIT)
|
|
mmc->card_caps |= MMC_MODE_4BIT;
|
|
|
|
/* Version 1.0 doesn't support switching */
|
|
if (mmc->version == SD_VERSION_1_0)
|
|
return 0;
|
|
|
|
timeout = 4;
|
|
while (timeout--) {
|
|
err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1,
|
|
(u8 *)switch_status);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
/* The high-speed function is busy. Try again */
|
|
if (!(__be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY))
|
|
break;
|
|
}
|
|
|
|
/* If high-speed isn't supported, we return */
|
|
if (!(__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED))
|
|
return 0;
|
|
|
|
/*
|
|
* If the host doesn't support SD_HIGHSPEED, do not switch card to
|
|
* HIGHSPEED mode even if the card support SD_HIGHSPPED.
|
|
* This can avoid furthur problem when the card runs in different
|
|
* mode between the host.
|
|
*/
|
|
if (!((mmc->host_caps & MMC_MODE_HS_52MHz) &&
|
|
(mmc->host_caps & MMC_MODE_HS)))
|
|
return 0;
|
|
|
|
err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)switch_status);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000)
|
|
mmc->card_caps |= MMC_MODE_HS;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* frequency bases */
|
|
/* divided by 10 to be nice to platforms without floating point */
|
|
static const int fbase[] = {
|
|
10000,
|
|
100000,
|
|
1000000,
|
|
10000000,
|
|
};
|
|
|
|
/* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice
|
|
* to platforms without floating point.
|
|
*/
|
|
static const int multipliers[] = {
|
|
0, /* reserved */
|
|
10,
|
|
12,
|
|
13,
|
|
15,
|
|
20,
|
|
25,
|
|
30,
|
|
35,
|
|
40,
|
|
45,
|
|
50,
|
|
55,
|
|
60,
|
|
70,
|
|
80,
|
|
};
|
|
|
|
static void mmc_set_ios(struct mmc *mmc)
|
|
{
|
|
mmc->set_ios(mmc);
|
|
}
|
|
|
|
void mmc_set_clock(struct mmc *mmc, uint clock)
|
|
{
|
|
if (clock > mmc->f_max)
|
|
clock = mmc->f_max;
|
|
|
|
if (clock < mmc->f_min)
|
|
clock = mmc->f_min;
|
|
|
|
mmc->clock = clock;
|
|
|
|
mmc_set_ios(mmc);
|
|
}
|
|
|
|
static void mmc_set_bus_width(struct mmc *mmc, uint width)
|
|
{
|
|
mmc->bus_width = width;
|
|
|
|
mmc_set_ios(mmc);
|
|
}
|
|
|
|
static int mmc_startup(struct mmc *mmc)
|
|
{
|
|
int err;
|
|
uint mult, freq;
|
|
u64 cmult, csize, capacity;
|
|
struct mmc_cmd cmd;
|
|
ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, 512);
|
|
ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, 512);
|
|
int timeout = 1000;
|
|
|
|
#ifdef CONFIG_MMC_SPI_CRC_ON
|
|
if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */
|
|
cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF;
|
|
cmd.resp_type = MMC_RSP_R1;
|
|
cmd.cmdarg = 1;
|
|
err = mmc_send_cmd(mmc, &cmd, NULL);
|
|
|
|
if (err)
|
|
return err;
|
|
}
|
|
#endif
|
|
|
|
/* Put the Card in Identify Mode */
|
|
cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID :
|
|
MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */
|
|
cmd.resp_type = MMC_RSP_R2;
|
|
cmd.cmdarg = 0;
|
|
|
|
err = mmc_send_cmd(mmc, &cmd, NULL);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
memcpy(mmc->cid, cmd.response, 16);
|
|
|
|
/*
|
|
* For MMC cards, set the Relative Address.
|
|
* For SD cards, get the Relatvie Address.
|
|
* This also puts the cards into Standby State
|
|
*/
|
|
if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
|
|
cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR;
|
|
cmd.cmdarg = mmc->rca << 16;
|
|
cmd.resp_type = MMC_RSP_R6;
|
|
|
|
err = mmc_send_cmd(mmc, &cmd, NULL);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
if (IS_SD(mmc))
|
|
mmc->rca = (cmd.response[0] >> 16) & 0xffff;
|
|
}
|
|
|
|
/* Get the Card-Specific Data */
|
|
cmd.cmdidx = MMC_CMD_SEND_CSD;
|
|
cmd.resp_type = MMC_RSP_R2;
|
|
cmd.cmdarg = mmc->rca << 16;
|
|
|
|
err = mmc_send_cmd(mmc, &cmd, NULL);
|
|
|
|
/* Waiting for the ready status */
|
|
mmc_send_status(mmc, timeout);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
mmc->csd[0] = cmd.response[0];
|
|
mmc->csd[1] = cmd.response[1];
|
|
mmc->csd[2] = cmd.response[2];
|
|
mmc->csd[3] = cmd.response[3];
|
|
|
|
if (mmc->version == MMC_VERSION_UNKNOWN) {
|
|
int version = (cmd.response[0] >> 26) & 0xf;
|
|
|
|
switch (version) {
|
|
case 0:
|
|
mmc->version = MMC_VERSION_1_2;
|
|
break;
|
|
case 1:
|
|
mmc->version = MMC_VERSION_1_4;
|
|
break;
|
|
case 2:
|
|
mmc->version = MMC_VERSION_2_2;
|
|
break;
|
|
case 3:
|
|
mmc->version = MMC_VERSION_3;
|
|
break;
|
|
case 4:
|
|
mmc->version = MMC_VERSION_4;
|
|
break;
|
|
default:
|
|
mmc->version = MMC_VERSION_1_2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* divide frequency by 10, since the mults are 10x bigger */
|
|
freq = fbase[(cmd.response[0] & 0x7)];
|
|
mult = multipliers[((cmd.response[0] >> 3) & 0xf)];
|
|
|
|
mmc->tran_speed = freq * mult;
|
|
|
|
mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf);
|
|
|
|
if (IS_SD(mmc))
|
|
mmc->write_bl_len = mmc->read_bl_len;
|
|
else
|
|
mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf);
|
|
|
|
if (mmc->high_capacity) {
|
|
csize = (mmc->csd[1] & 0x3f) << 16
|
|
| (mmc->csd[2] & 0xffff0000) >> 16;
|
|
cmult = 8;
|
|
} else {
|
|
csize = (mmc->csd[1] & 0x3ff) << 2
|
|
| (mmc->csd[2] & 0xc0000000) >> 30;
|
|
cmult = (mmc->csd[2] & 0x00038000) >> 15;
|
|
}
|
|
|
|
mmc->capacity = (csize + 1) << (cmult + 2);
|
|
mmc->capacity *= mmc->read_bl_len;
|
|
|
|
if (mmc->read_bl_len > 512)
|
|
mmc->read_bl_len = 512;
|
|
|
|
if (mmc->write_bl_len > 512)
|
|
mmc->write_bl_len = 512;
|
|
|
|
/* Select the card, and put it into Transfer Mode */
|
|
if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */
|
|
cmd.cmdidx = MMC_CMD_SELECT_CARD;
|
|
cmd.resp_type = MMC_RSP_R1;
|
|
cmd.cmdarg = mmc->rca << 16;
|
|
err = mmc_send_cmd(mmc, &cmd, NULL);
|
|
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* For SD, its erase group is always one sector
|
|
*/
|
|
mmc->erase_grp_size = 1;
|
|
mmc->part_config = MMCPART_NOAVAILABLE;
|
|
if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) {
|
|
/* check ext_csd version and capacity */
|
|
err = mmc_send_ext_csd(mmc, ext_csd);
|
|
if (!err && (ext_csd[EXT_CSD_REV] >= 2)) {
|
|
/*
|
|
* According to the JEDEC Standard, the value of
|
|
* ext_csd's capacity is valid if the value is more
|
|
* than 2GB
|
|
*/
|
|
capacity = ext_csd[EXT_CSD_SEC_CNT] << 0
|
|
| ext_csd[EXT_CSD_SEC_CNT + 1] << 8
|
|
| ext_csd[EXT_CSD_SEC_CNT + 2] << 16
|
|
| ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
|
|
capacity *= 512;
|
|
if ((capacity >> 20) > 2 * 1024)
|
|
mmc->capacity = capacity;
|
|
}
|
|
|
|
/*
|
|
* Check whether GROUP_DEF is set, if yes, read out
|
|
* group size from ext_csd directly, or calculate
|
|
* the group size from the csd value.
|
|
*/
|
|
if (ext_csd[EXT_CSD_ERASE_GROUP_DEF])
|
|
mmc->erase_grp_size =
|
|
ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * 512 * 1024;
|
|
else {
|
|
int erase_gsz, erase_gmul;
|
|
erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10;
|
|
erase_gmul = (mmc->csd[2] & 0x000003e0) >> 5;
|
|
mmc->erase_grp_size = (erase_gsz + 1)
|
|
* (erase_gmul + 1);
|
|
}
|
|
|
|
/* store the partition info of emmc */
|
|
if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) ||
|
|
ext_csd[EXT_CSD_BOOT_MULT])
|
|
mmc->part_config = ext_csd[EXT_CSD_PART_CONF];
|
|
}
|
|
|
|
if (IS_SD(mmc))
|
|
err = sd_change_freq(mmc);
|
|
else
|
|
err = mmc_change_freq(mmc);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
/* Restrict card's capabilities by what the host can do */
|
|
mmc->card_caps &= mmc->host_caps;
|
|
|
|
if (IS_SD(mmc)) {
|
|
if (mmc->card_caps & MMC_MODE_4BIT) {
|
|
cmd.cmdidx = MMC_CMD_APP_CMD;
|
|
cmd.resp_type = MMC_RSP_R1;
|
|
cmd.cmdarg = mmc->rca << 16;
|
|
|
|
err = mmc_send_cmd(mmc, &cmd, NULL);
|
|
if (err)
|
|
return err;
|
|
|
|
cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH;
|
|
cmd.resp_type = MMC_RSP_R1;
|
|
cmd.cmdarg = 2;
|
|
err = mmc_send_cmd(mmc, &cmd, NULL);
|
|
if (err)
|
|
return err;
|
|
|
|
mmc_set_bus_width(mmc, 4);
|
|
}
|
|
|
|
if (mmc->card_caps & MMC_MODE_HS)
|
|
mmc->tran_speed = 50000000;
|
|
else
|
|
mmc->tran_speed = 25000000;
|
|
} else {
|
|
int idx;
|
|
|
|
/* An array of possible bus widths in order of preference */
|
|
static unsigned ext_csd_bits[] = {
|
|
EXT_CSD_BUS_WIDTH_8,
|
|
EXT_CSD_BUS_WIDTH_4,
|
|
EXT_CSD_BUS_WIDTH_1,
|
|
};
|
|
|
|
/* An array to map CSD bus widths to host cap bits */
|
|
static unsigned ext_to_hostcaps[] = {
|
|
[EXT_CSD_BUS_WIDTH_4] = MMC_MODE_4BIT,
|
|
[EXT_CSD_BUS_WIDTH_8] = MMC_MODE_8BIT,
|
|
};
|
|
|
|
/* An array to map chosen bus width to an integer */
|
|
static unsigned widths[] = {
|
|
8, 4, 1,
|
|
};
|
|
|
|
for (idx=0; idx < ARRAY_SIZE(ext_csd_bits); idx++) {
|
|
unsigned int extw = ext_csd_bits[idx];
|
|
|
|
/*
|
|
* Check to make sure the controller supports
|
|
* this bus width, if it's more than 1
|
|
*/
|
|
if (extw != EXT_CSD_BUS_WIDTH_1 &&
|
|
!(mmc->host_caps & ext_to_hostcaps[extw]))
|
|
continue;
|
|
|
|
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
|
|
EXT_CSD_BUS_WIDTH, extw);
|
|
|
|
if (err)
|
|
continue;
|
|
|
|
mmc_set_bus_width(mmc, widths[idx]);
|
|
|
|
err = mmc_send_ext_csd(mmc, test_csd);
|
|
if (!err && ext_csd[EXT_CSD_PARTITIONING_SUPPORT] \
|
|
== test_csd[EXT_CSD_PARTITIONING_SUPPORT]
|
|
&& ext_csd[EXT_CSD_ERASE_GROUP_DEF] \
|
|
== test_csd[EXT_CSD_ERASE_GROUP_DEF] \
|
|
&& ext_csd[EXT_CSD_REV] \
|
|
== test_csd[EXT_CSD_REV]
|
|
&& ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] \
|
|
== test_csd[EXT_CSD_HC_ERASE_GRP_SIZE]
|
|
&& memcmp(&ext_csd[EXT_CSD_SEC_CNT], \
|
|
&test_csd[EXT_CSD_SEC_CNT], 4) == 0) {
|
|
|
|
mmc->card_caps |= ext_to_hostcaps[extw];
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (mmc->card_caps & MMC_MODE_HS) {
|
|
if (mmc->card_caps & MMC_MODE_HS_52MHz)
|
|
mmc->tran_speed = 52000000;
|
|
else
|
|
mmc->tran_speed = 26000000;
|
|
}
|
|
}
|
|
|
|
mmc_set_clock(mmc, mmc->tran_speed);
|
|
|
|
/* fill in device description */
|
|
mmc->block_dev.lun = 0;
|
|
mmc->block_dev.type = 0;
|
|
mmc->block_dev.blksz = mmc->read_bl_len;
|
|
mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len);
|
|
sprintf(mmc->block_dev.vendor, "Man %06x Snr %04x%04x",
|
|
mmc->cid[0] >> 24, (mmc->cid[2] & 0xffff),
|
|
(mmc->cid[3] >> 16) & 0xffff);
|
|
sprintf(mmc->block_dev.product, "%c%c%c%c%c%c", mmc->cid[0] & 0xff,
|
|
(mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
|
|
(mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff,
|
|
(mmc->cid[2] >> 24) & 0xff);
|
|
sprintf(mmc->block_dev.revision, "%d.%d", (mmc->cid[2] >> 20) & 0xf,
|
|
(mmc->cid[2] >> 16) & 0xf);
|
|
#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBDISK_SUPPORT)
|
|
init_part(&mmc->block_dev);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mmc_send_if_cond(struct mmc *mmc)
|
|
{
|
|
struct mmc_cmd cmd;
|
|
int err;
|
|
|
|
cmd.cmdidx = SD_CMD_SEND_IF_COND;
|
|
/* We set the bit if the host supports voltages between 2.7 and 3.6 V */
|
|
cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa;
|
|
cmd.resp_type = MMC_RSP_R7;
|
|
|
|
err = mmc_send_cmd(mmc, &cmd, NULL);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
if ((cmd.response[0] & 0xff) != 0xaa)
|
|
return UNUSABLE_ERR;
|
|
else
|
|
mmc->version = SD_VERSION_2;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mmc_register(struct mmc *mmc)
|
|
{
|
|
/* Setup the universal parts of the block interface just once */
|
|
mmc->block_dev.if_type = IF_TYPE_MMC;
|
|
mmc->block_dev.dev = cur_dev_num++;
|
|
mmc->block_dev.removable = 1;
|
|
mmc->block_dev.block_read = mmc_bread;
|
|
mmc->block_dev.block_write = mmc_bwrite;
|
|
mmc->block_dev.block_erase = mmc_berase;
|
|
if (!mmc->b_max)
|
|
mmc->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
|
|
|
|
INIT_LIST_HEAD (&mmc->link);
|
|
|
|
list_add_tail (&mmc->link, &mmc_devices);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PARTITIONS
|
|
block_dev_desc_t *mmc_get_dev(int dev)
|
|
{
|
|
struct mmc *mmc = find_mmc_device(dev);
|
|
if (!mmc || mmc_init(mmc))
|
|
return NULL;
|
|
|
|
return &mmc->block_dev;
|
|
}
|
|
#endif
|
|
|
|
int mmc_init(struct mmc *mmc)
|
|
{
|
|
int err;
|
|
|
|
if (mmc_getcd(mmc) == 0) {
|
|
mmc->has_init = 0;
|
|
printf("MMC: no card present\n");
|
|
return NO_CARD_ERR;
|
|
}
|
|
|
|
if (mmc->has_init)
|
|
return 0;
|
|
|
|
err = mmc->init(mmc);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
mmc_set_bus_width(mmc, 1);
|
|
mmc_set_clock(mmc, 1);
|
|
|
|
/* Reset the Card */
|
|
err = mmc_go_idle(mmc);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
/* The internal partition reset to user partition(0) at every CMD0*/
|
|
mmc->part_num = 0;
|
|
|
|
/* Test for SD version 2 */
|
|
err = mmc_send_if_cond(mmc);
|
|
|
|
/* Now try to get the SD card's operating condition */
|
|
err = sd_send_op_cond(mmc);
|
|
|
|
/* If the command timed out, we check for an MMC card */
|
|
if (err == TIMEOUT) {
|
|
err = mmc_send_op_cond(mmc);
|
|
|
|
if (err) {
|
|
printf("Card did not respond to voltage select!\n");
|
|
return UNUSABLE_ERR;
|
|
}
|
|
}
|
|
|
|
err = mmc_startup(mmc);
|
|
if (err)
|
|
mmc->has_init = 0;
|
|
else
|
|
mmc->has_init = 1;
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* CPU and board-specific MMC initializations. Aliased function
|
|
* signals caller to move on
|
|
*/
|
|
static int __def_mmc_init(bd_t *bis)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
int cpu_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
|
|
int board_mmc_init(bd_t *bis) __attribute__((weak, alias("__def_mmc_init")));
|
|
|
|
void print_mmc_devices(char separator)
|
|
{
|
|
struct mmc *m;
|
|
struct list_head *entry;
|
|
|
|
list_for_each(entry, &mmc_devices) {
|
|
m = list_entry(entry, struct mmc, link);
|
|
|
|
printf("%s: %d", m->name, m->block_dev.dev);
|
|
|
|
if (entry->next != &mmc_devices)
|
|
printf("%c ", separator);
|
|
}
|
|
|
|
printf("\n");
|
|
}
|
|
|
|
int get_mmc_num(void)
|
|
{
|
|
return cur_dev_num;
|
|
}
|
|
|
|
int mmc_initialize(bd_t *bis)
|
|
{
|
|
INIT_LIST_HEAD (&mmc_devices);
|
|
cur_dev_num = 0;
|
|
|
|
if (board_mmc_init(bis) < 0)
|
|
cpu_mmc_init(bis);
|
|
|
|
print_mmc_devices(',');
|
|
|
|
return 0;
|
|
}
|