X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fmmc%2Fgen_atmel_mci.c;h=c11dcd0f97c074bb147d94d7f9ec0de7ae5acc8b;hb=6e51ca41002c5e92f7fec088320e340102dd3f5b;hp=fa4df9943a7906481b94f3d83db199b43791bbe4;hpb=a78ded13111dde555ed5de99cff10f41ae674cb1;p=u-boot diff --git a/drivers/mmc/gen_atmel_mci.c b/drivers/mmc/gen_atmel_mci.c index fa4df9943a..c11dcd0f97 100644 --- a/drivers/mmc/gen_atmel_mci.c +++ b/drivers/mmc/gen_atmel_mci.c @@ -6,23 +6,7 @@ * Original Driver: * Copyright (C) 2004-2006 Atmel Corporation * - * 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 + * SPDX-License-Identifier: GPL-2.0+ */ #include @@ -33,7 +17,7 @@ #include #include #include -#include +#include #include "atmel_mci.h" #ifndef CONFIG_SYS_MMC_CLK_OD @@ -50,6 +34,12 @@ static int initialized = 0; +/* Read Atmel MCI IP version */ +static unsigned int atmel_mci_get_version(struct atmel_mci *mci) +{ + return readl(&mci->version) & 0x00000fff; +} + /* * Print command and status: * @@ -87,6 +77,11 @@ static void mci_set_mode(struct mmc *mmc, u32 hz, u32 blklen) | MMCI_BF(BLKLEN, blklen) | MMCI_BIT(RDPROOF) | MMCI_BIT(WRPROOF)), &mci->mr); + /* + * On some new platforms BLKLEN in mci->mr is ignored. + * Should use the BLKLEN in the block register. + */ + writel(MMCI_BF(BLKLEN, blklen), &mci->blkr); initialized = 1; } @@ -183,6 +178,12 @@ mci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) /* Figure out the transfer arguments */ cmdr = mci_encode_cmd(cmd, data, &error_flags); + /* For multi blocks read/write, set the block register */ + if ((cmd->cmdidx == MMC_CMD_READ_MULTIPLE_BLOCK) + || (cmd->cmdidx == MMC_CMD_WRITE_MULTIPLE_BLOCK)) + writel(data->blocks | MMCI_BF(BLKLEN, mmc->read_bl_len), + &mci->blkr); + /* Send the command */ writel(cmd->cmdarg, &mci->argr); writel(cmdr, &mci->cmdr); @@ -194,7 +195,10 @@ mci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) /* Wait for the command to complete */ while (!((status = readl(&mci->sr)) & MMCI_BIT(CMDRDY))); - if (status & error_flags) { + if ((status & error_flags) & MMCI_BIT(RTOE)) { + dump_cmd(cmdr, cmd->cmdarg, status, "Command Time Out"); + return TIMEOUT; + } else if (status & error_flags) { dump_cmd(cmdr, cmd->cmdarg, status, "Command Failed"); return COMM_ERR; } @@ -286,7 +290,9 @@ mci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) static void mci_set_ios(struct mmc *mmc) { atmel_mci_t *mci = (atmel_mci_t *)mmc->priv; - int busw = (mmc->bus_width == 4) ? 1 : 0; + int bus_width = mmc->bus_width; + unsigned int version = atmel_mci_get_version(mci); + int busw; /* Set the clock speed */ mci_set_mode(mmc, mmc->clock, MMC_DEFAULT_BLKLEN); @@ -294,9 +300,26 @@ static void mci_set_ios(struct mmc *mmc) /* * set the bus width and select slot for this interface * there is no capability for multiple slots on the same interface yet - * Bitfield SCDBUS needs to be expanded to 2 bits for 8-bit buses */ - writel(MMCI_BF(SCDBUS, busw) | MMCI_BF(SCDSEL, MCI_BUS), &mci->sdcr); + if ((version & 0xf00) >= 0x300) { + switch (bus_width) { + case 8: + busw = 3; + break; + case 4: + busw = 2; + break; + default: + busw = 0; + break; + } + + writel(busw << 6 | MMCI_BF(SCDSEL, MCI_BUS), &mci->sdcr); + } else { + busw = (bus_width == 4) ? 1 : 0; + + writel(busw << 7 | MMCI_BF(SCDSEL, MCI_BUS), &mci->sdcr); + } } /* Entered into mmc structure during driver init */ @@ -308,9 +331,10 @@ static int mci_init(struct mmc *mmc) writel(MMCI_BIT(SWRST), &mci->cr); /* soft reset */ writel(MMCI_BIT(PWSDIS), &mci->cr); /* disable power save */ writel(MMCI_BIT(MCIEN), &mci->cr); /* enable mci */ + writel(MMCI_BF(SCDSEL, MCI_BUS), &mci->sdcr); /* select port */ - /* Initial Time-outs */ - writel(0x5f, &mci->dtor); + /* This delay can be optimized, but stick with max value */ + writel(0x7f, &mci->dtor); /* Disable Interrupts */ writel(~0UL, &mci->idr); @@ -328,18 +352,29 @@ static int mci_init(struct mmc *mmc) int atmel_mci_init(void *regs) { struct mmc *mmc = malloc(sizeof(struct mmc)); + struct atmel_mci *mci; + unsigned int version; if (!mmc) return -1; + strcpy(mmc->name, "mci"); mmc->priv = regs; mmc->send_cmd = mci_send_cmd; mmc->set_ios = mci_set_ios; mmc->init = mci_init; + mmc->getcd = NULL; + mmc->getwp = NULL; /* need to be able to pass these in on a board by board basis */ mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34; - mmc->host_caps = MMC_MODE_4BIT; + mci = (struct atmel_mci *)mmc->priv; + version = atmel_mci_get_version(mci); + if ((version & 0xf00) >= 0x300) + mmc->host_caps = MMC_MODE_8BIT; + + mmc->host_caps |= MMC_MODE_4BIT; + /* * min and max frequencies determined by * max and min of clock divider @@ -347,6 +382,8 @@ int atmel_mci_init(void *regs) mmc->f_min = get_mci_clk_rate() / (2*256); mmc->f_max = get_mci_clk_rate() / (2*1); + mmc->b_max = 0; + mmc_register(mmc); return 0;