6d0e34bf4e
The sdhci controller assumes that the base clock frequency is fully supported by the peripheral and doesn't support hardware limitations. The Linux kernel distinguishes between base clock (max_clk) of the host controller and maximum frequency (f_max) of the card interface. Use the same differentiation and allow the platform to constrain the peripheral interface. Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
620 lines
15 KiB
C
620 lines
15 KiB
C
/*
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* Copyright 2011, Marvell Semiconductor Inc.
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* Lei Wen <leiwen@marvell.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* Back ported to the 8xx platform (from the 8260 platform) by
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* Murray.Jensen@cmst.csiro.au, 27-Jan-01.
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*/
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#include <common.h>
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#include <errno.h>
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#include <malloc.h>
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#include <mmc.h>
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#include <sdhci.h>
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#if defined(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER)
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void *aligned_buffer = (void *)CONFIG_FIXED_SDHCI_ALIGNED_BUFFER;
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#else
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void *aligned_buffer;
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#endif
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static void sdhci_reset(struct sdhci_host *host, u8 mask)
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{
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unsigned long timeout;
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/* Wait max 100 ms */
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timeout = 100;
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sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
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while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) {
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if (timeout == 0) {
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printf("%s: Reset 0x%x never completed.\n",
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__func__, (int)mask);
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return;
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}
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timeout--;
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udelay(1000);
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}
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}
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static void sdhci_cmd_done(struct sdhci_host *host, struct mmc_cmd *cmd)
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{
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int i;
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if (cmd->resp_type & MMC_RSP_136) {
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/* CRC is stripped so we need to do some shifting. */
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for (i = 0; i < 4; i++) {
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cmd->response[i] = sdhci_readl(host,
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SDHCI_RESPONSE + (3-i)*4) << 8;
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if (i != 3)
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cmd->response[i] |= sdhci_readb(host,
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SDHCI_RESPONSE + (3-i)*4-1);
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}
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} else {
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cmd->response[0] = sdhci_readl(host, SDHCI_RESPONSE);
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}
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}
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static void sdhci_transfer_pio(struct sdhci_host *host, struct mmc_data *data)
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{
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int i;
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char *offs;
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for (i = 0; i < data->blocksize; i += 4) {
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offs = data->dest + i;
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if (data->flags == MMC_DATA_READ)
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*(u32 *)offs = sdhci_readl(host, SDHCI_BUFFER);
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else
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sdhci_writel(host, *(u32 *)offs, SDHCI_BUFFER);
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}
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}
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static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data,
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unsigned int start_addr)
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{
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unsigned int stat, rdy, mask, timeout, block = 0;
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#ifdef CONFIG_MMC_SDHCI_SDMA
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unsigned char ctrl;
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ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
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ctrl &= ~SDHCI_CTRL_DMA_MASK;
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sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
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#endif
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timeout = 1000000;
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rdy = SDHCI_INT_SPACE_AVAIL | SDHCI_INT_DATA_AVAIL;
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mask = SDHCI_DATA_AVAILABLE | SDHCI_SPACE_AVAILABLE;
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do {
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stat = sdhci_readl(host, SDHCI_INT_STATUS);
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if (stat & SDHCI_INT_ERROR) {
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printf("%s: Error detected in status(0x%X)!\n",
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__func__, stat);
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return -EIO;
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}
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if (stat & rdy) {
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if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & mask))
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continue;
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sdhci_writel(host, rdy, SDHCI_INT_STATUS);
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sdhci_transfer_pio(host, data);
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data->dest += data->blocksize;
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if (++block >= data->blocks)
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break;
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}
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#ifdef CONFIG_MMC_SDHCI_SDMA
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if (stat & SDHCI_INT_DMA_END) {
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sdhci_writel(host, SDHCI_INT_DMA_END, SDHCI_INT_STATUS);
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start_addr &= ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1);
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start_addr += SDHCI_DEFAULT_BOUNDARY_SIZE;
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sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS);
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}
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#endif
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if (timeout-- > 0)
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udelay(10);
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else {
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printf("%s: Transfer data timeout\n", __func__);
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return -ETIMEDOUT;
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}
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} while (!(stat & SDHCI_INT_DATA_END));
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return 0;
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}
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/*
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* No command will be sent by driver if card is busy, so driver must wait
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* for card ready state.
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* Every time when card is busy after timeout then (last) timeout value will be
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* increased twice but only if it doesn't exceed global defined maximum.
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* Each function call will use last timeout value.
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*/
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#define SDHCI_CMD_MAX_TIMEOUT 3200
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#define SDHCI_CMD_DEFAULT_TIMEOUT 100
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#define SDHCI_READ_STATUS_TIMEOUT 1000
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#ifdef CONFIG_DM_MMC_OPS
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static int sdhci_send_command(struct udevice *dev, struct mmc_cmd *cmd,
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struct mmc_data *data)
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{
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struct mmc *mmc = mmc_get_mmc_dev(dev);
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#else
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static int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
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struct mmc_data *data)
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{
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#endif
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struct sdhci_host *host = mmc->priv;
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unsigned int stat = 0;
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int ret = 0;
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int trans_bytes = 0, is_aligned = 1;
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u32 mask, flags, mode;
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unsigned int time = 0, start_addr = 0;
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int mmc_dev = mmc_get_blk_desc(mmc)->devnum;
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unsigned start = get_timer(0);
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/* Timeout unit - ms */
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static unsigned int cmd_timeout = SDHCI_CMD_DEFAULT_TIMEOUT;
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sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS);
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mask = SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT;
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/* We shouldn't wait for data inihibit for stop commands, even
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though they might use busy signaling */
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if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
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mask &= ~SDHCI_DATA_INHIBIT;
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while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
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if (time >= cmd_timeout) {
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printf("%s: MMC: %d busy ", __func__, mmc_dev);
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if (2 * cmd_timeout <= SDHCI_CMD_MAX_TIMEOUT) {
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cmd_timeout += cmd_timeout;
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printf("timeout increasing to: %u ms.\n",
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cmd_timeout);
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} else {
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puts("timeout.\n");
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return -ECOMM;
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}
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}
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time++;
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udelay(1000);
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}
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mask = SDHCI_INT_RESPONSE;
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if (!(cmd->resp_type & MMC_RSP_PRESENT))
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flags = SDHCI_CMD_RESP_NONE;
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else if (cmd->resp_type & MMC_RSP_136)
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flags = SDHCI_CMD_RESP_LONG;
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else if (cmd->resp_type & MMC_RSP_BUSY) {
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flags = SDHCI_CMD_RESP_SHORT_BUSY;
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if (data)
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mask |= SDHCI_INT_DATA_END;
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} else
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flags = SDHCI_CMD_RESP_SHORT;
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if (cmd->resp_type & MMC_RSP_CRC)
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flags |= SDHCI_CMD_CRC;
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if (cmd->resp_type & MMC_RSP_OPCODE)
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flags |= SDHCI_CMD_INDEX;
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if (data)
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flags |= SDHCI_CMD_DATA;
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/* Set Transfer mode regarding to data flag */
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if (data != 0) {
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sdhci_writeb(host, 0xe, SDHCI_TIMEOUT_CONTROL);
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mode = SDHCI_TRNS_BLK_CNT_EN;
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trans_bytes = data->blocks * data->blocksize;
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if (data->blocks > 1)
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mode |= SDHCI_TRNS_MULTI;
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if (data->flags == MMC_DATA_READ)
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mode |= SDHCI_TRNS_READ;
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#ifdef CONFIG_MMC_SDHCI_SDMA
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if (data->flags == MMC_DATA_READ)
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start_addr = (unsigned long)data->dest;
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else
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start_addr = (unsigned long)data->src;
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if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
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(start_addr & 0x7) != 0x0) {
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is_aligned = 0;
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start_addr = (unsigned long)aligned_buffer;
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if (data->flags != MMC_DATA_READ)
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memcpy(aligned_buffer, data->src, trans_bytes);
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}
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#if defined(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER)
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/*
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* Always use this bounce-buffer when
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* CONFIG_FIXED_SDHCI_ALIGNED_BUFFER is defined
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*/
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is_aligned = 0;
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start_addr = (unsigned long)aligned_buffer;
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if (data->flags != MMC_DATA_READ)
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memcpy(aligned_buffer, data->src, trans_bytes);
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#endif
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sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS);
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mode |= SDHCI_TRNS_DMA;
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#endif
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sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG,
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data->blocksize),
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SDHCI_BLOCK_SIZE);
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sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT);
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sdhci_writew(host, mode, SDHCI_TRANSFER_MODE);
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} else if (cmd->resp_type & MMC_RSP_BUSY) {
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sdhci_writeb(host, 0xe, SDHCI_TIMEOUT_CONTROL);
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}
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sdhci_writel(host, cmd->cmdarg, SDHCI_ARGUMENT);
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#ifdef CONFIG_MMC_SDHCI_SDMA
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trans_bytes = ALIGN(trans_bytes, CONFIG_SYS_CACHELINE_SIZE);
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flush_cache(start_addr, trans_bytes);
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#endif
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sdhci_writew(host, SDHCI_MAKE_CMD(cmd->cmdidx, flags), SDHCI_COMMAND);
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start = get_timer(0);
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do {
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stat = sdhci_readl(host, SDHCI_INT_STATUS);
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if (stat & SDHCI_INT_ERROR)
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break;
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if (get_timer(start) >= SDHCI_READ_STATUS_TIMEOUT) {
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if (host->quirks & SDHCI_QUIRK_BROKEN_R1B) {
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return 0;
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} else {
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printf("%s: Timeout for status update!\n",
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__func__);
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return -ETIMEDOUT;
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}
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}
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} while ((stat & mask) != mask);
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if ((stat & (SDHCI_INT_ERROR | mask)) == mask) {
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sdhci_cmd_done(host, cmd);
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sdhci_writel(host, mask, SDHCI_INT_STATUS);
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} else
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ret = -1;
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if (!ret && data)
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ret = sdhci_transfer_data(host, data, start_addr);
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if (host->quirks & SDHCI_QUIRK_WAIT_SEND_CMD)
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udelay(1000);
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stat = sdhci_readl(host, SDHCI_INT_STATUS);
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sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS);
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if (!ret) {
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if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
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!is_aligned && (data->flags == MMC_DATA_READ))
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memcpy(data->dest, aligned_buffer, trans_bytes);
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return 0;
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}
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sdhci_reset(host, SDHCI_RESET_CMD);
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sdhci_reset(host, SDHCI_RESET_DATA);
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if (stat & SDHCI_INT_TIMEOUT)
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return -ETIMEDOUT;
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else
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return -ECOMM;
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}
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static int sdhci_set_clock(struct mmc *mmc, unsigned int clock)
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{
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struct sdhci_host *host = mmc->priv;
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unsigned int div, clk = 0, timeout, reg;
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/* Wait max 20 ms */
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timeout = 200;
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while (sdhci_readl(host, SDHCI_PRESENT_STATE) &
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(SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT)) {
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if (timeout == 0) {
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printf("%s: Timeout to wait cmd & data inhibit\n",
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__func__);
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return -EBUSY;
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}
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timeout--;
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udelay(100);
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}
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reg = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
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reg &= ~(SDHCI_CLOCK_CARD_EN | SDHCI_CLOCK_INT_EN);
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sdhci_writew(host, reg, SDHCI_CLOCK_CONTROL);
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if (clock == 0)
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return 0;
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if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
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/*
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* Check if the Host Controller supports Programmable Clock
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* Mode.
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*/
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if (host->clk_mul) {
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for (div = 1; div <= 1024; div++) {
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if ((host->max_clk * host->clk_mul / div)
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<= clock)
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break;
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}
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/*
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* Set Programmable Clock Mode in the Clock
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* Control register.
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*/
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clk = SDHCI_PROG_CLOCK_MODE;
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div--;
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} else {
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/* Version 3.00 divisors must be a multiple of 2. */
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if (host->max_clk <= clock) {
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div = 1;
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} else {
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for (div = 2;
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div < SDHCI_MAX_DIV_SPEC_300;
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div += 2) {
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if ((host->max_clk / div) <= clock)
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break;
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}
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}
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div >>= 1;
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}
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} else {
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/* Version 2.00 divisors must be a power of 2. */
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for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) {
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if ((host->max_clk / div) <= clock)
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break;
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}
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div >>= 1;
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}
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if (host->ops && host->ops->set_clock)
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host->ops->set_clock(host, div);
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clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
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clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
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<< SDHCI_DIVIDER_HI_SHIFT;
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clk |= SDHCI_CLOCK_INT_EN;
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sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
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/* Wait max 20 ms */
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timeout = 20;
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while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
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& SDHCI_CLOCK_INT_STABLE)) {
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if (timeout == 0) {
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printf("%s: Internal clock never stabilised.\n",
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__func__);
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return -EBUSY;
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}
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timeout--;
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udelay(1000);
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}
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clk |= SDHCI_CLOCK_CARD_EN;
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sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
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return 0;
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}
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static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
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{
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u8 pwr = 0;
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if (power != (unsigned short)-1) {
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switch (1 << power) {
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case MMC_VDD_165_195:
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pwr = SDHCI_POWER_180;
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break;
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case MMC_VDD_29_30:
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case MMC_VDD_30_31:
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pwr = SDHCI_POWER_300;
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break;
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case MMC_VDD_32_33:
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case MMC_VDD_33_34:
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pwr = SDHCI_POWER_330;
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break;
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}
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}
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if (pwr == 0) {
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sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
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return;
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}
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pwr |= SDHCI_POWER_ON;
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sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
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}
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#ifdef CONFIG_DM_MMC_OPS
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static int sdhci_set_ios(struct udevice *dev)
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{
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struct mmc *mmc = mmc_get_mmc_dev(dev);
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#else
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static int sdhci_set_ios(struct mmc *mmc)
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{
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#endif
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u32 ctrl;
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struct sdhci_host *host = mmc->priv;
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if (host->ops && host->ops->set_control_reg)
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host->ops->set_control_reg(host);
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if (mmc->clock != host->clock)
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sdhci_set_clock(mmc, mmc->clock);
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/* Set bus width */
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ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
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if (mmc->bus_width == 8) {
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ctrl &= ~SDHCI_CTRL_4BITBUS;
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if ((SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) ||
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(host->quirks & SDHCI_QUIRK_USE_WIDE8))
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ctrl |= SDHCI_CTRL_8BITBUS;
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} else {
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if ((SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) ||
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(host->quirks & SDHCI_QUIRK_USE_WIDE8))
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ctrl &= ~SDHCI_CTRL_8BITBUS;
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if (mmc->bus_width == 4)
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ctrl |= SDHCI_CTRL_4BITBUS;
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else
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ctrl &= ~SDHCI_CTRL_4BITBUS;
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}
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if (mmc->clock > 26000000)
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ctrl |= SDHCI_CTRL_HISPD;
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else
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ctrl &= ~SDHCI_CTRL_HISPD;
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if (host->quirks & SDHCI_QUIRK_NO_HISPD_BIT)
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ctrl &= ~SDHCI_CTRL_HISPD;
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sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
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return 0;
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}
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static int sdhci_init(struct mmc *mmc)
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{
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struct sdhci_host *host = mmc->priv;
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sdhci_reset(host, SDHCI_RESET_ALL);
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if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) && !aligned_buffer) {
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aligned_buffer = memalign(8, 512*1024);
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if (!aligned_buffer) {
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printf("%s: Aligned buffer alloc failed!!!\n",
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__func__);
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return -ENOMEM;
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}
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}
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sdhci_set_power(host, fls(mmc->cfg->voltages) - 1);
|
|
|
|
if (host->ops && host->ops->get_cd)
|
|
host->ops->get_cd(host);
|
|
|
|
/* Enable only interrupts served by the SD controller */
|
|
sdhci_writel(host, SDHCI_INT_DATA_MASK | SDHCI_INT_CMD_MASK,
|
|
SDHCI_INT_ENABLE);
|
|
/* Mask all sdhci interrupt sources */
|
|
sdhci_writel(host, 0x0, SDHCI_SIGNAL_ENABLE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_DM_MMC_OPS
|
|
int sdhci_probe(struct udevice *dev)
|
|
{
|
|
struct mmc *mmc = mmc_get_mmc_dev(dev);
|
|
|
|
return sdhci_init(mmc);
|
|
}
|
|
|
|
const struct dm_mmc_ops sdhci_ops = {
|
|
.send_cmd = sdhci_send_command,
|
|
.set_ios = sdhci_set_ios,
|
|
};
|
|
#else
|
|
static const struct mmc_ops sdhci_ops = {
|
|
.send_cmd = sdhci_send_command,
|
|
.set_ios = sdhci_set_ios,
|
|
.init = sdhci_init,
|
|
};
|
|
#endif
|
|
|
|
int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
|
|
u32 f_max, u32 f_min)
|
|
{
|
|
u32 caps, caps_1;
|
|
|
|
caps = sdhci_readl(host, SDHCI_CAPABILITIES);
|
|
|
|
#ifdef CONFIG_MMC_SDHCI_SDMA
|
|
if (!(caps & SDHCI_CAN_DO_SDMA)) {
|
|
printf("%s: Your controller doesn't support SDMA!!\n",
|
|
__func__);
|
|
return -EINVAL;
|
|
}
|
|
#endif
|
|
if (host->quirks & SDHCI_QUIRK_REG32_RW)
|
|
host->version =
|
|
sdhci_readl(host, SDHCI_HOST_VERSION - 2) >> 16;
|
|
else
|
|
host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
|
|
|
|
cfg->name = host->name;
|
|
#ifndef CONFIG_DM_MMC_OPS
|
|
cfg->ops = &sdhci_ops;
|
|
#endif
|
|
if (host->max_clk == 0) {
|
|
if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300)
|
|
host->max_clk = (caps & SDHCI_CLOCK_V3_BASE_MASK) >>
|
|
SDHCI_CLOCK_BASE_SHIFT;
|
|
else
|
|
host->max_clk = (caps & SDHCI_CLOCK_BASE_MASK) >>
|
|
SDHCI_CLOCK_BASE_SHIFT;
|
|
host->max_clk *= 1000000;
|
|
}
|
|
if (host->max_clk == 0) {
|
|
printf("%s: Hardware doesn't specify base clock frequency\n",
|
|
__func__);
|
|
return -EINVAL;
|
|
}
|
|
if (f_max && (f_max < host->max_clk))
|
|
cfg->f_max = f_max;
|
|
else
|
|
cfg->f_max = host->max_clk;
|
|
if (f_min)
|
|
cfg->f_min = f_min;
|
|
else {
|
|
if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300)
|
|
cfg->f_min = cfg->f_max / SDHCI_MAX_DIV_SPEC_300;
|
|
else
|
|
cfg->f_min = cfg->f_max / SDHCI_MAX_DIV_SPEC_200;
|
|
}
|
|
cfg->voltages = 0;
|
|
if (caps & SDHCI_CAN_VDD_330)
|
|
cfg->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34;
|
|
if (caps & SDHCI_CAN_VDD_300)
|
|
cfg->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31;
|
|
if (caps & SDHCI_CAN_VDD_180)
|
|
cfg->voltages |= MMC_VDD_165_195;
|
|
|
|
if (host->quirks & SDHCI_QUIRK_BROKEN_VOLTAGE)
|
|
cfg->voltages |= host->voltages;
|
|
|
|
cfg->host_caps = MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_4BIT;
|
|
|
|
/* Since Host Controller Version3.0 */
|
|
if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
|
|
if (!(caps & SDHCI_CAN_DO_8BIT))
|
|
cfg->host_caps &= ~MMC_MODE_8BIT;
|
|
|
|
/* Find out whether clock multiplier is supported */
|
|
caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
|
|
host->clk_mul = (caps_1 & SDHCI_CLOCK_MUL_MASK) >>
|
|
SDHCI_CLOCK_MUL_SHIFT;
|
|
}
|
|
|
|
if (host->host_caps)
|
|
cfg->host_caps |= host->host_caps;
|
|
|
|
cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_BLK
|
|
int sdhci_bind(struct udevice *dev, struct mmc *mmc, struct mmc_config *cfg)
|
|
{
|
|
return mmc_bind(dev, mmc, cfg);
|
|
}
|
|
#else
|
|
int add_sdhci(struct sdhci_host *host, u32 f_max, u32 f_min)
|
|
{
|
|
int ret;
|
|
|
|
ret = sdhci_setup_cfg(&host->cfg, host, f_max, f_min);
|
|
if (ret)
|
|
return ret;
|
|
|
|
host->mmc = mmc_create(&host->cfg, host);
|
|
if (host->mmc == NULL) {
|
|
printf("%s: mmc create fail!\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|