mmc: tmio: add eMMC support
We need to add R1 without CRC support, refactor the bus width routine a little and extend a quirk check. To support "non-removable;" we need a workaround which will be hopefully removed when reworking PM soon. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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@ -79,6 +79,9 @@
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#define CLK_CTL_DIV_MASK 0xff
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#define CLK_CTL_SCLKEN BIT(8)
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#define CARD_OPT_WIDTH8 BIT(13)
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#define CARD_OPT_WIDTH BIT(15)
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#define TMIO_BBS 512 /* Boot block size */
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/* Definitions for values the CTRL_SDIO_STATUS register can take. */
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@ -336,7 +336,9 @@ static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command
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switch (mmc_resp_type(cmd)) {
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case MMC_RSP_NONE: c |= RESP_NONE; break;
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case MMC_RSP_R1: c |= RESP_R1; break;
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case MMC_RSP_R1:
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case MMC_RSP_R1_NO_CRC:
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c |= RESP_R1; break;
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case MMC_RSP_R1B: c |= RESP_R1B; break;
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case MMC_RSP_R2: c |= RESP_R2; break;
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case MMC_RSP_R3: c |= RESP_R3; break;
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@ -730,12 +732,13 @@ static int tmio_mmc_start_data(struct tmio_mmc_host *host,
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pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n",
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data->blksz, data->blocks);
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/* Some hardware cannot perform 2 byte requests in 4 bit mode */
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if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) {
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/* Some hardware cannot perform 2 byte requests in 4/8 bit mode */
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if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4 ||
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host->mmc->ios.bus_width == MMC_BUS_WIDTH_8) {
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int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES;
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if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) {
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pr_err("%s: %d byte block unsupported in 4 bit mode\n",
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pr_err("%s: %d byte block unsupported in 4/8 bit mode\n",
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mmc_hostname(host->mmc), data->blksz);
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return -EINVAL;
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}
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@ -857,14 +860,16 @@ static void tmio_mmc_power_off(struct tmio_mmc_host *host)
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static void tmio_mmc_set_bus_width(struct tmio_mmc_host *host,
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unsigned char bus_width)
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{
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switch (bus_width) {
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case MMC_BUS_WIDTH_1:
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sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0);
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break;
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case MMC_BUS_WIDTH_4:
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sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0);
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break;
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}
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u16 reg = sd_ctrl_read16(host, CTL_SD_MEM_CARD_OPT)
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& ~(CARD_OPT_WIDTH | CARD_OPT_WIDTH8);
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/* reg now applies to MMC_BUS_WIDTH_4 */
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if (bus_width == MMC_BUS_WIDTH_1)
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reg |= CARD_OPT_WIDTH;
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else if (bus_width == MMC_BUS_WIDTH_8)
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reg |= CARD_OPT_WIDTH8;
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sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, reg);
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}
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/* Set MMC clock / power.
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@ -1082,6 +1087,15 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
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!mmc_card_is_removable(mmc) ||
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mmc->slot.cd_irq >= 0);
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/*
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* On Gen2+, eMMC with NONREMOVABLE currently fails because native
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* hotplug gets disabled. It seems RuntimePM related yet we need further
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* research. Since we are planning a PM overhaul anyway, let's enforce
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* for now the device being active by enabling native hotplug always.
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*/
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if (pdata->flags & TMIO_MMC_MIN_RCAR2)
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_host->native_hotplug = true;
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if (tmio_mmc_clk_enable(_host) < 0) {
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mmc->f_max = pdata->hclk;
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mmc->f_min = mmc->f_max / 512;
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