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Diffstat (limited to 'drivers/mmc/mxcmmc.c')
-rw-r--r--drivers/mmc/mxcmmc.c523
1 files changed, 0 insertions, 523 deletions
diff --git a/drivers/mmc/mxcmmc.c b/drivers/mmc/mxcmmc.c
deleted file mode 100644
index 1acea6f820b..00000000000
--- a/drivers/mmc/mxcmmc.c
+++ /dev/null
@@ -1,523 +0,0 @@
-/*
- * This is a driver for the SDHC controller found in Freescale MX2/MX3
- * SoCs. It is basically the same hardware as found on MX1 (imxmmc.c).
- * Unlike the hardware found on MX1, this hardware just works and does
- * not need all the quirks found in imxmmc.c, hence the seperate driver.
- *
- * Copyright (C) 2009 Ilya Yanok, <yanok@emcraft.com>
- * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
- * Copyright (C) 2006 Pavel Pisa, PiKRON <ppisa@pikron.com>
- *
- * derived from pxamci.c by Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-
-#include <config.h>
-#include <command.h>
-#include <mmc.h>
-#include <part.h>
-#include <malloc.h>
-#include <mmc.h>
-#include <time.h>
-#include <linux/errno.h>
-#include <asm/io.h>
-#include <asm/arch/clock.h>
-
-#define DRIVER_NAME "mxc-mmc"
-
-struct mxcmci_regs {
- u32 str_stp_clk;
- u32 status;
- u32 clk_rate;
- u32 cmd_dat_cont;
- u32 res_to;
- u32 read_to;
- u32 blk_len;
- u32 nob;
- u32 rev_no;
- u32 int_cntr;
- u32 cmd;
- u32 arg;
- u32 pad;
- u32 res_fifo;
- u32 buffer_access;
-};
-
-#define STR_STP_CLK_RESET (1 << 3)
-#define STR_STP_CLK_START_CLK (1 << 1)
-#define STR_STP_CLK_STOP_CLK (1 << 0)
-
-#define STATUS_CARD_INSERTION (1 << 31)
-#define STATUS_CARD_REMOVAL (1 << 30)
-#define STATUS_YBUF_EMPTY (1 << 29)
-#define STATUS_XBUF_EMPTY (1 << 28)
-#define STATUS_YBUF_FULL (1 << 27)
-#define STATUS_XBUF_FULL (1 << 26)
-#define STATUS_BUF_UND_RUN (1 << 25)
-#define STATUS_BUF_OVFL (1 << 24)
-#define STATUS_SDIO_INT_ACTIVE (1 << 14)
-#define STATUS_END_CMD_RESP (1 << 13)
-#define STATUS_WRITE_OP_DONE (1 << 12)
-#define STATUS_DATA_TRANS_DONE (1 << 11)
-#define STATUS_READ_OP_DONE (1 << 11)
-#define STATUS_WR_CRC_ERROR_CODE_MASK (3 << 10)
-#define STATUS_CARD_BUS_CLK_RUN (1 << 8)
-#define STATUS_BUF_READ_RDY (1 << 7)
-#define STATUS_BUF_WRITE_RDY (1 << 6)
-#define STATUS_RESP_CRC_ERR (1 << 5)
-#define STATUS_CRC_READ_ERR (1 << 3)
-#define STATUS_CRC_WRITE_ERR (1 << 2)
-#define STATUS_TIME_OUT_RESP (1 << 1)
-#define STATUS_TIME_OUT_READ (1 << 0)
-#define STATUS_ERR_MASK 0x2f
-
-#define CMD_DAT_CONT_CMD_RESP_LONG_OFF (1 << 12)
-#define CMD_DAT_CONT_STOP_READWAIT (1 << 11)
-#define CMD_DAT_CONT_START_READWAIT (1 << 10)
-#define CMD_DAT_CONT_BUS_WIDTH_4 (2 << 8)
-#define CMD_DAT_CONT_INIT (1 << 7)
-#define CMD_DAT_CONT_WRITE (1 << 4)
-#define CMD_DAT_CONT_DATA_ENABLE (1 << 3)
-#define CMD_DAT_CONT_RESPONSE_48BIT_CRC (1 << 0)
-#define CMD_DAT_CONT_RESPONSE_136BIT (2 << 0)
-#define CMD_DAT_CONT_RESPONSE_48BIT (3 << 0)
-
-#define INT_SDIO_INT_WKP_EN (1 << 18)
-#define INT_CARD_INSERTION_WKP_EN (1 << 17)
-#define INT_CARD_REMOVAL_WKP_EN (1 << 16)
-#define INT_CARD_INSERTION_EN (1 << 15)
-#define INT_CARD_REMOVAL_EN (1 << 14)
-#define INT_SDIO_IRQ_EN (1 << 13)
-#define INT_DAT0_EN (1 << 12)
-#define INT_BUF_READ_EN (1 << 4)
-#define INT_BUF_WRITE_EN (1 << 3)
-#define INT_END_CMD_RES_EN (1 << 2)
-#define INT_WRITE_OP_DONE_EN (1 << 1)
-#define INT_READ_OP_EN (1 << 0)
-
-struct mxcmci_host {
- struct mmc *mmc;
- struct mxcmci_regs *base;
- int irq;
- int detect_irq;
- int dma;
- int do_dma;
- unsigned int power_mode;
-
- struct mmc_cmd *cmd;
- struct mmc_data *data;
-
- unsigned int dma_nents;
- unsigned int datasize;
- unsigned int dma_dir;
-
- u16 rev_no;
- unsigned int cmdat;
-
- int clock;
-};
-
-static struct mxcmci_host mxcmci_host;
-
-/* maintainer note: do we really want to have a global host pointer? */
-static struct mxcmci_host *host = &mxcmci_host;
-
-static inline int mxcmci_use_dma(struct mxcmci_host *host)
-{
- return host->do_dma;
-}
-
-static void mxcmci_softreset(struct mxcmci_host *host)
-{
- int i;
-
- /* reset sequence */
- writel(STR_STP_CLK_RESET, &host->base->str_stp_clk);
- writel(STR_STP_CLK_RESET | STR_STP_CLK_START_CLK,
- &host->base->str_stp_clk);
-
- for (i = 0; i < 8; i++)
- writel(STR_STP_CLK_START_CLK, &host->base->str_stp_clk);
-
- writel(0xff, &host->base->res_to);
-}
-
-static void mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data)
-{
- unsigned int nob = data->blocks;
- unsigned int blksz = data->blocksize;
- unsigned int datasize = nob * blksz;
-
- host->data = data;
-
- writel(nob, &host->base->nob);
- writel(blksz, &host->base->blk_len);
- host->datasize = datasize;
-}
-
-static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_cmd *cmd,
- unsigned int cmdat)
-{
- if (host->cmd != NULL)
- printf("mxcmci: error!\n");
- host->cmd = cmd;
-
- switch (cmd->resp_type) {
- case MMC_RSP_R1: /* short CRC, OPCODE */
- case MMC_RSP_R1b:/* short CRC, OPCODE, BUSY */
- cmdat |= CMD_DAT_CONT_RESPONSE_48BIT_CRC;
- break;
- case MMC_RSP_R2: /* long 136 bit + CRC */
- cmdat |= CMD_DAT_CONT_RESPONSE_136BIT;
- break;
- case MMC_RSP_R3: /* short */
- cmdat |= CMD_DAT_CONT_RESPONSE_48BIT;
- break;
- case MMC_RSP_NONE:
- break;
- default:
- printf("mxcmci: unhandled response type 0x%x\n",
- cmd->resp_type);
- return -EINVAL;
- }
-
- writel(cmd->cmdidx, &host->base->cmd);
- writel(cmd->cmdarg, &host->base->arg);
- writel(cmdat, &host->base->cmd_dat_cont);
-
- return 0;
-}
-
-static void mxcmci_finish_request(struct mxcmci_host *host,
- struct mmc_cmd *cmd, struct mmc_data *data)
-{
- host->cmd = NULL;
- host->data = NULL;
-}
-
-static int mxcmci_finish_data(struct mxcmci_host *host, unsigned int stat)
-{
- int data_error = 0;
-
- if (stat & STATUS_ERR_MASK) {
- printf("request failed. status: 0x%08x\n",
- stat);
- if (stat & STATUS_CRC_READ_ERR) {
- data_error = -EILSEQ;
- } else if (stat & STATUS_CRC_WRITE_ERR) {
- u32 err_code = (stat >> 9) & 0x3;
- if (err_code == 2) /* No CRC response */
- data_error = -ETIMEDOUT;
- else
- data_error = -EILSEQ;
- } else if (stat & STATUS_TIME_OUT_READ) {
- data_error = -ETIMEDOUT;
- } else {
- data_error = -EIO;
- }
- }
-
- host->data = NULL;
-
- return data_error;
-}
-
-static int mxcmci_read_response(struct mxcmci_host *host, unsigned int stat)
-{
- struct mmc_cmd *cmd = host->cmd;
- int i;
- u32 a, b, c;
- u32 *resp = (u32 *)cmd->response;
-
- if (!cmd)
- return 0;
-
- if (stat & STATUS_TIME_OUT_RESP) {
- printf("CMD TIMEOUT\n");
- return -ETIMEDOUT;
- } else if (stat & STATUS_RESP_CRC_ERR && cmd->resp_type & MMC_RSP_CRC) {
- printf("cmd crc error\n");
- return -EILSEQ;
- }
-
- if (cmd->resp_type & MMC_RSP_PRESENT) {
- if (cmd->resp_type & MMC_RSP_136) {
- for (i = 0; i < 4; i++) {
- a = readl(&host->base->res_fifo) & 0xFFFF;
- b = readl(&host->base->res_fifo) & 0xFFFF;
- resp[i] = a << 16 | b;
- }
- } else {
- a = readl(&host->base->res_fifo) & 0xFFFF;
- b = readl(&host->base->res_fifo) & 0xFFFF;
- c = readl(&host->base->res_fifo) & 0xFFFF;
- resp[0] = a << 24 | b << 8 | c >> 8;
- }
- }
- return 0;
-}
-
-static int mxcmci_poll_status(struct mxcmci_host *host, u32 mask)
-{
- u32 stat;
- unsigned long timeout = get_ticks() + CONFIG_SYS_HZ;
-
- do {
- stat = readl(&host->base->status);
- if (stat & STATUS_ERR_MASK)
- return stat;
- if (timeout < get_ticks())
- return STATUS_TIME_OUT_READ;
- if (stat & mask)
- return 0;
- } while (1);
-}
-
-static int mxcmci_pull(struct mxcmci_host *host, void *_buf, int bytes)
-{
- unsigned int stat;
- u32 *buf = _buf;
-
- while (bytes > 3) {
- stat = mxcmci_poll_status(host,
- STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE);
- if (stat)
- return stat;
- *buf++ = readl(&host->base->buffer_access);
- bytes -= 4;
- }
-
- if (bytes) {
- u8 *b = (u8 *)buf;
- u32 tmp;
-
- stat = mxcmci_poll_status(host,
- STATUS_BUF_READ_RDY | STATUS_READ_OP_DONE);
- if (stat)
- return stat;
- tmp = readl(&host->base->buffer_access);
- memcpy(b, &tmp, bytes);
- }
-
- return 0;
-}
-
-static int mxcmci_push(struct mxcmci_host *host, const void *_buf, int bytes)
-{
- unsigned int stat;
- const u32 *buf = _buf;
-
- while (bytes > 3) {
- stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY);
- if (stat)
- return stat;
- writel(*buf++, &host->base->buffer_access);
- bytes -= 4;
- }
-
- if (bytes) {
- const u8 *b = (u8 *)buf;
- u32 tmp;
-
- stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY);
- if (stat)
- return stat;
-
- memcpy(&tmp, b, bytes);
- writel(tmp, &host->base->buffer_access);
- }
-
- stat = mxcmci_poll_status(host, STATUS_BUF_WRITE_RDY);
- if (stat)
- return stat;
-
- return 0;
-}
-
-static int mxcmci_transfer_data(struct mxcmci_host *host)
-{
- struct mmc_data *data = host->data;
- int stat;
- unsigned long length;
-
- length = data->blocks * data->blocksize;
- host->datasize = 0;
-
- if (data->flags & MMC_DATA_READ) {
- stat = mxcmci_pull(host, data->dest, length);
- if (stat)
- return stat;
- host->datasize += length;
- } else {
- stat = mxcmci_push(host, (const void *)(data->src), length);
- if (stat)
- return stat;
- host->datasize += length;
- stat = mxcmci_poll_status(host, STATUS_WRITE_OP_DONE);
- if (stat)
- return stat;
- }
- return 0;
-}
-
-static int mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat)
-{
- int datastat;
- int ret;
-
- ret = mxcmci_read_response(host, stat);
-
- if (ret) {
- mxcmci_finish_request(host, host->cmd, host->data);
- return ret;
- }
-
- if (!host->data) {
- mxcmci_finish_request(host, host->cmd, host->data);
- return 0;
- }
-
- datastat = mxcmci_transfer_data(host);
- ret = mxcmci_finish_data(host, datastat);
- mxcmci_finish_request(host, host->cmd, host->data);
- return ret;
-}
-
-static int mxcmci_request(struct mmc *mmc, struct mmc_cmd *cmd,
- struct mmc_data *data)
-{
- struct mxcmci_host *host = mmc->priv;
- unsigned int cmdat = host->cmdat;
- u32 stat;
- int ret;
-
- host->cmdat &= ~CMD_DAT_CONT_INIT;
- if (data) {
- mxcmci_setup_data(host, data);
-
- cmdat |= CMD_DAT_CONT_DATA_ENABLE;
-
- if (data->flags & MMC_DATA_WRITE)
- cmdat |= CMD_DAT_CONT_WRITE;
- }
-
- if ((ret = mxcmci_start_cmd(host, cmd, cmdat))) {
- mxcmci_finish_request(host, cmd, data);
- return ret;
- }
-
- do {
- stat = readl(&host->base->status);
- writel(stat, &host->base->status);
- } while (!(stat & STATUS_END_CMD_RESP));
-
- return mxcmci_cmd_done(host, stat);
-}
-
-static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios)
-{
- unsigned int divider;
- int prescaler = 0;
- unsigned long clk_in = mxc_get_clock(MXC_ESDHC_CLK);
-
- while (prescaler <= 0x800) {
- for (divider = 1; divider <= 0xF; divider++) {
- int x;
-
- x = (clk_in / (divider + 1));
-
- if (prescaler)
- x /= (prescaler * 2);
-
- if (x <= clk_ios)
- break;
- }
- if (divider < 0x10)
- break;
-
- if (prescaler == 0)
- prescaler = 1;
- else
- prescaler <<= 1;
- }
-
- writel((prescaler << 4) | divider, &host->base->clk_rate);
-}
-
-static int mxcmci_set_ios(struct mmc *mmc)
-{
- struct mxcmci_host *host = mmc->priv;
- if (mmc->bus_width == 4)
- host->cmdat |= CMD_DAT_CONT_BUS_WIDTH_4;
- else
- host->cmdat &= ~CMD_DAT_CONT_BUS_WIDTH_4;
-
- if (mmc->clock) {
- mxcmci_set_clk_rate(host, mmc->clock);
- writel(STR_STP_CLK_START_CLK, &host->base->str_stp_clk);
- } else {
- writel(STR_STP_CLK_STOP_CLK, &host->base->str_stp_clk);
- }
-
- host->clock = mmc->clock;
-
- return 0;
-}
-
-static int mxcmci_init(struct mmc *mmc)
-{
- struct mxcmci_host *host = mmc->priv;
-
- mxcmci_softreset(host);
-
- host->rev_no = readl(&host->base->rev_no);
- if (host->rev_no != 0x400) {
- printf("wrong rev.no. 0x%08x. aborting.\n",
- host->rev_no);
- return -ENODEV;
- }
-
- /* recommended in data sheet */
- writel(0x2db4, &host->base->read_to);
-
- writel(0, &host->base->int_cntr);
-
- return 0;
-}
-
-static const struct mmc_ops mxcmci_ops = {
- .send_cmd = mxcmci_request,
- .set_ios = mxcmci_set_ios,
- .init = mxcmci_init,
-};
-
-static struct mmc_config mxcmci_cfg = {
- .name = "MXC MCI",
- .ops = &mxcmci_ops,
- .host_caps = MMC_MODE_4BIT,
- .voltages = MMC_VDD_32_33 | MMC_VDD_33_34,
- .b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT,
-};
-
-static int mxcmci_initialize(struct bd_info *bis)
-{
- host->base = (struct mxcmci_regs *)CONFIG_MXC_MCI_REGS_BASE;
-
- mxcmci_cfg.f_min = mxc_get_clock(MXC_ESDHC_CLK) >> 7;
- mxcmci_cfg.f_max = mxc_get_clock(MXC_ESDHC_CLK) >> 1;
-
- host->mmc = mmc_create(&mxcmci_cfg, host);
- if (host->mmc == NULL)
- return -1;
-
- return 0;
-}
-
-int mxc_mmc_init(struct bd_info *bis)
-{
- return mxcmci_initialize(bis);
-}
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