EXTRA_CFLAGS += -DDEBUG
endif
-#
-# Core
-#
-obj-$(CONFIG_MMC) += mmc_core.o
-mmc_core-y := mmc.o mmc_sysfs.o
-
+obj-$(CONFIG_MMC) += core/
obj-$(CONFIG_MMC) += card/
obj-$(CONFIG_MMC) += host/
--- /dev/null
+#
+# Makefile for the kernel mmc core.
+#
+
+ifeq ($(CONFIG_MMC_DEBUG),y)
+ EXTRA_CFLAGS += -DDEBUG
+endif
+
+obj-$(CONFIG_MMC) += mmc_core.o
+mmc_core-y := core.o sysfs.o
+
--- /dev/null
+/*
+ * linux/drivers/mmc/core/core.c
+ *
+ * Copyright (C) 2003-2004 Russell King, All Rights Reserved.
+ * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved.
+ * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
+ * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
+ *
+ * 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 <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/completion.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/pagemap.h>
+#include <linux/err.h>
+#include <asm/scatterlist.h>
+#include <linux/scatterlist.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/protocol.h>
+
+#include "core.h"
+
+#define CMD_RETRIES 3
+
+/*
+ * OCR Bit positions to 10s of Vdd mV.
+ */
+static const unsigned short mmc_ocr_bit_to_vdd[] = {
+ 150, 155, 160, 165, 170, 180, 190, 200,
+ 210, 220, 230, 240, 250, 260, 270, 280,
+ 290, 300, 310, 320, 330, 340, 350, 360
+};
+
+static const unsigned int tran_exp[] = {
+ 10000, 100000, 1000000, 10000000,
+ 0, 0, 0, 0
+};
+
+static const unsigned char tran_mant[] = {
+ 0, 10, 12, 13, 15, 20, 25, 30,
+ 35, 40, 45, 50, 55, 60, 70, 80,
+};
+
+static const unsigned int tacc_exp[] = {
+ 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
+};
+
+static const unsigned int tacc_mant[] = {
+ 0, 10, 12, 13, 15, 20, 25, 30,
+ 35, 40, 45, 50, 55, 60, 70, 80,
+};
+
+
+/**
+ * mmc_request_done - finish processing an MMC request
+ * @host: MMC host which completed request
+ * @mrq: MMC request which request
+ *
+ * MMC drivers should call this function when they have completed
+ * their processing of a request.
+ */
+void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
+{
+ struct mmc_command *cmd = mrq->cmd;
+ int err = cmd->error;
+
+ pr_debug("%s: req done (CMD%u): %d/%d/%d: %08x %08x %08x %08x\n",
+ mmc_hostname(host), cmd->opcode, err,
+ mrq->data ? mrq->data->error : 0,
+ mrq->stop ? mrq->stop->error : 0,
+ cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
+
+ if (err && cmd->retries) {
+ cmd->retries--;
+ cmd->error = 0;
+ host->ops->request(host, mrq);
+ } else if (mrq->done) {
+ mrq->done(mrq);
+ }
+}
+
+EXPORT_SYMBOL(mmc_request_done);
+
+/**
+ * mmc_start_request - start a command on a host
+ * @host: MMC host to start command on
+ * @mrq: MMC request to start
+ *
+ * Queue a command on the specified host. We expect the
+ * caller to be holding the host lock with interrupts disabled.
+ */
+void
+mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
+{
+#ifdef CONFIG_MMC_DEBUG
+ unsigned int i, sz;
+#endif
+
+ pr_debug("%s: starting CMD%u arg %08x flags %08x\n",
+ mmc_hostname(host), mrq->cmd->opcode,
+ mrq->cmd->arg, mrq->cmd->flags);
+
+ WARN_ON(!host->claimed);
+
+ mrq->cmd->error = 0;
+ mrq->cmd->mrq = mrq;
+ if (mrq->data) {
+ BUG_ON(mrq->data->blksz > host->max_blk_size);
+ BUG_ON(mrq->data->blocks > host->max_blk_count);
+ BUG_ON(mrq->data->blocks * mrq->data->blksz >
+ host->max_req_size);
+
+#ifdef CONFIG_MMC_DEBUG
+ sz = 0;
+ for (i = 0;i < mrq->data->sg_len;i++)
+ sz += mrq->data->sg[i].length;
+ BUG_ON(sz != mrq->data->blocks * mrq->data->blksz);
+#endif
+
+ mrq->cmd->data = mrq->data;
+ mrq->data->error = 0;
+ mrq->data->mrq = mrq;
+ if (mrq->stop) {
+ mrq->data->stop = mrq->stop;
+ mrq->stop->error = 0;
+ mrq->stop->mrq = mrq;
+ }
+ }
+ host->ops->request(host, mrq);
+}
+
+EXPORT_SYMBOL(mmc_start_request);
+
+static void mmc_wait_done(struct mmc_request *mrq)
+{
+ complete(mrq->done_data);
+}
+
+int mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
+{
+ DECLARE_COMPLETION_ONSTACK(complete);
+
+ mrq->done_data = &complete;
+ mrq->done = mmc_wait_done;
+
+ mmc_start_request(host, mrq);
+
+ wait_for_completion(&complete);
+
+ return 0;
+}
+
+EXPORT_SYMBOL(mmc_wait_for_req);
+
+/**
+ * mmc_wait_for_cmd - start a command and wait for completion
+ * @host: MMC host to start command
+ * @cmd: MMC command to start
+ * @retries: maximum number of retries
+ *
+ * Start a new MMC command for a host, and wait for the command
+ * to complete. Return any error that occurred while the command
+ * was executing. Do not attempt to parse the response.
+ */
+int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries)
+{
+ struct mmc_request mrq;
+
+ BUG_ON(!host->claimed);
+
+ memset(&mrq, 0, sizeof(struct mmc_request));
+
+ memset(cmd->resp, 0, sizeof(cmd->resp));
+ cmd->retries = retries;
+
+ mrq.cmd = cmd;
+ cmd->data = NULL;
+
+ mmc_wait_for_req(host, &mrq);
+
+ return cmd->error;
+}
+
+EXPORT_SYMBOL(mmc_wait_for_cmd);
+
+/**
+ * mmc_wait_for_app_cmd - start an application command and wait for
+ completion
+ * @host: MMC host to start command
+ * @rca: RCA to send MMC_APP_CMD to
+ * @cmd: MMC command to start
+ * @retries: maximum number of retries
+ *
+ * Sends a MMC_APP_CMD, checks the card response, sends the command
+ * in the parameter and waits for it to complete. Return any error
+ * that occurred while the command was executing. Do not attempt to
+ * parse the response.
+ */
+int mmc_wait_for_app_cmd(struct mmc_host *host, unsigned int rca,
+ struct mmc_command *cmd, int retries)
+{
+ struct mmc_request mrq;
+ struct mmc_command appcmd;
+
+ int i, err;
+
+ BUG_ON(!host->claimed);
+ BUG_ON(retries < 0);
+
+ err = MMC_ERR_INVALID;
+
+ /*
+ * We have to resend MMC_APP_CMD for each attempt so
+ * we cannot use the retries field in mmc_command.
+ */
+ for (i = 0;i <= retries;i++) {
+ memset(&mrq, 0, sizeof(struct mmc_request));
+
+ appcmd.opcode = MMC_APP_CMD;
+ appcmd.arg = rca << 16;
+ appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+ appcmd.retries = 0;
+ memset(appcmd.resp, 0, sizeof(appcmd.resp));
+ appcmd.data = NULL;
+
+ mrq.cmd = &appcmd;
+ appcmd.data = NULL;
+
+ mmc_wait_for_req(host, &mrq);
+
+ if (appcmd.error) {
+ err = appcmd.error;
+ continue;
+ }
+
+ /* Check that card supported application commands */
+ if (!(appcmd.resp[0] & R1_APP_CMD))
+ return MMC_ERR_FAILED;
+
+ memset(&mrq, 0, sizeof(struct mmc_request));
+
+ memset(cmd->resp, 0, sizeof(cmd->resp));
+ cmd->retries = 0;
+
+ mrq.cmd = cmd;
+ cmd->data = NULL;
+
+ mmc_wait_for_req(host, &mrq);
+
+ err = cmd->error;
+ if (cmd->error == MMC_ERR_NONE)
+ break;
+ }
+
+ return err;
+}
+
+EXPORT_SYMBOL(mmc_wait_for_app_cmd);
+
+/**
+ * mmc_set_data_timeout - set the timeout for a data command
+ * @data: data phase for command
+ * @card: the MMC card associated with the data transfer
+ * @write: flag to differentiate reads from writes
+ */
+void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card,
+ int write)
+{
+ unsigned int mult;
+
+ /*
+ * SD cards use a 100 multiplier rather than 10
+ */
+ mult = mmc_card_sd(card) ? 100 : 10;
+
+ /*
+ * Scale up the multiplier (and therefore the timeout) by
+ * the r2w factor for writes.
+ */
+ if (write)
+ mult <<= card->csd.r2w_factor;
+
+ data->timeout_ns = card->csd.tacc_ns * mult;
+ data->timeout_clks = card->csd.tacc_clks * mult;
+
+ /*
+ * SD cards also have an upper limit on the timeout.
+ */
+ if (mmc_card_sd(card)) {
+ unsigned int timeout_us, limit_us;
+
+ timeout_us = data->timeout_ns / 1000;
+ timeout_us += data->timeout_clks * 1000 /
+ (card->host->ios.clock / 1000);
+
+ if (write)
+ limit_us = 250000;
+ else
+ limit_us = 100000;
+
+ /*
+ * SDHC cards always use these fixed values.
+ */
+ if (timeout_us > limit_us || mmc_card_blockaddr(card)) {
+ data->timeout_ns = limit_us * 1000;
+ data->timeout_clks = 0;
+ }
+ }
+}
+EXPORT_SYMBOL(mmc_set_data_timeout);
+
+/**
+ * __mmc_claim_host - exclusively claim a host
+ * @host: mmc host to claim
+ * @card: mmc card to claim host for
+ *
+ * Claim a host for a set of operations. If a valid card
+ * is passed and this wasn't the last card selected, select
+ * the card before returning.
+ *
+ * Note: you should use mmc_card_claim_host or mmc_claim_host.
+ */
+void mmc_claim_host(struct mmc_host *host)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ unsigned long flags;
+
+ add_wait_queue(&host->wq, &wait);
+ spin_lock_irqsave(&host->lock, flags);
+ while (1) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ if (!host->claimed)
+ break;
+ spin_unlock_irqrestore(&host->lock, flags);
+ schedule();
+ spin_lock_irqsave(&host->lock, flags);
+ }
+ set_current_state(TASK_RUNNING);
+ host->claimed = 1;
+ spin_unlock_irqrestore(&host->lock, flags);
+ remove_wait_queue(&host->wq, &wait);
+}
+
+EXPORT_SYMBOL(mmc_claim_host);
+
+/**
+ * mmc_release_host - release a host
+ * @host: mmc host to release
+ *
+ * Release a MMC host, allowing others to claim the host
+ * for their operations.
+ */
+void mmc_release_host(struct mmc_host *host)
+{
+ unsigned long flags;
+
+ BUG_ON(!host->claimed);
+
+ spin_lock_irqsave(&host->lock, flags);
+ host->claimed = 0;
+ spin_unlock_irqrestore(&host->lock, flags);
+
+ wake_up(&host->wq);
+}
+
+EXPORT_SYMBOL(mmc_release_host);
+
+static inline void mmc_set_ios(struct mmc_host *host)
+{
+ struct mmc_ios *ios = &host->ios;
+
+ pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u "
+ "width %u timing %u\n",
+ mmc_hostname(host), ios->clock, ios->bus_mode,
+ ios->power_mode, ios->chip_select, ios->vdd,
+ ios->bus_width, ios->timing);
+
+ host->ops->set_ios(host, ios);
+}
+
+static int mmc_select_card(struct mmc_card *card)
+{
+ int err;
+ struct mmc_command cmd;
+
+ BUG_ON(!card->host->claimed);
+
+ cmd.opcode = MMC_SELECT_CARD;
+ cmd.arg = card->rca << 16;
+ cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+ err = mmc_wait_for_cmd(card->host, &cmd, CMD_RETRIES);
+ if (err != MMC_ERR_NONE)
+ return err;
+
+ /*
+ * We can only change the bus width of SD cards when
+ * they are selected so we have to put the handling
+ * here.
+ *
+ * The card is in 1 bit mode by default so
+ * we only need to change if it supports the
+ * wider version.
+ */
+ if (mmc_card_sd(card) &&
+ (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4) &&
+ (card->host->caps & MMC_CAP_4_BIT_DATA)) {
+
+ struct mmc_command cmd;
+ cmd.opcode = SD_APP_SET_BUS_WIDTH;
+ cmd.arg = SD_BUS_WIDTH_4;
+ cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+ err = mmc_wait_for_app_cmd(card->host, card->rca,
+ &cmd, CMD_RETRIES);
+ if (err != MMC_ERR_NONE)
+ return err;
+
+ card->host->ios.bus_width = MMC_BUS_WIDTH_4;
+ mmc_set_ios(card->host);
+ }
+
+ return MMC_ERR_NONE;
+}
+
+
+static inline void mmc_delay(unsigned int ms)
+{
+ if (ms < 1000 / HZ) {
+ cond_resched();
+ mdelay(ms);
+ } else {
+ msleep(ms);
+ }
+}
+
+/*
+ * Mask off any voltages we don't support and select
+ * the lowest voltage
+ */
+static u32 mmc_select_voltage(struct mmc_host *host, u32 ocr)
+{
+ int bit;
+
+ ocr &= host->ocr_avail;
+
+ bit = ffs(ocr);
+ if (bit) {
+ bit -= 1;
+
+ ocr &= 3 << bit;
+
+ host->ios.vdd = bit;
+ mmc_set_ios(host);
+ } else {
+ ocr = 0;
+ }
+
+ return ocr;
+}
+
+#define UNSTUFF_BITS(resp,start,size) \
+ ({ \
+ const int __size = size; \
+ const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
+ const int __off = 3 - ((start) / 32); \
+ const int __shft = (start) & 31; \
+ u32 __res; \
+ \
+ __res = resp[__off] >> __shft; \
+ if (__size + __shft > 32) \
+ __res |= resp[__off-1] << ((32 - __shft) % 32); \
+ __res & __mask; \
+ })
+
+/*
+ * Given the decoded CSD structure, decode the raw CID to our CID structure.
+ */
+static void mmc_decode_cid(struct mmc_card *card)
+{
+ u32 *resp = card->raw_cid;
+
+ memset(&card->cid, 0, sizeof(struct mmc_cid));
+
+ if (mmc_card_sd(card)) {
+ /*
+ * SD doesn't currently have a version field so we will
+ * have to assume we can parse this.
+ */
+ card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
+ card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
+ card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
+ card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
+ card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
+ card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
+ card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
+ card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4);
+ card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4);
+ card->cid.serial = UNSTUFF_BITS(resp, 24, 32);
+ card->cid.year = UNSTUFF_BITS(resp, 12, 8);
+ card->cid.month = UNSTUFF_BITS(resp, 8, 4);
+
+ card->cid.year += 2000; /* SD cards year offset */
+ } else {
+ /*
+ * The selection of the format here is based upon published
+ * specs from sandisk and from what people have reported.
+ */
+ switch (card->csd.mmca_vsn) {
+ case 0: /* MMC v1.0 - v1.2 */
+ case 1: /* MMC v1.4 */
+ card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
+ card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
+ card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
+ card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
+ card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
+ card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
+ card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
+ card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
+ card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
+ card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
+ card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
+ card->cid.month = UNSTUFF_BITS(resp, 12, 4);
+ card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
+ break;
+
+ case 2: /* MMC v2.0 - v2.2 */
+ case 3: /* MMC v3.1 - v3.3 */
+ case 4: /* MMC v4 */
+ card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
+ card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
+ card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
+ card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
+ card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
+ card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
+ card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
+ card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
+ card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
+ card->cid.month = UNSTUFF_BITS(resp, 12, 4);
+ card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
+ break;
+
+ default:
+ printk("%s: card has unknown MMCA version %d\n",
+ mmc_hostname(card->host), card->csd.mmca_vsn);
+ mmc_card_set_bad(card);
+ break;
+ }
+ }
+}
+
+/*
+ * Given a 128-bit response, decode to our card CSD structure.
+ */
+static void mmc_decode_csd(struct mmc_card *card)
+{
+ struct mmc_csd *csd = &card->csd;
+ unsigned int e, m, csd_struct;
+ u32 *resp = card->raw_csd;
+
+ if (mmc_card_sd(card)) {
+ csd_struct = UNSTUFF_BITS(resp, 126, 2);
+
+ switch (csd_struct) {
+ case 0:
+ m = UNSTUFF_BITS(resp, 115, 4);
+ e = UNSTUFF_BITS(resp, 112, 3);
+ csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
+ csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
+
+ m = UNSTUFF_BITS(resp, 99, 4);
+ e = UNSTUFF_BITS(resp, 96, 3);
+ csd->max_dtr = tran_exp[e] * tran_mant[m];
+ csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
+
+ e = UNSTUFF_BITS(resp, 47, 3);
+ m = UNSTUFF_BITS(resp, 62, 12);
+ csd->capacity = (1 + m) << (e + 2);
+
+ csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
+ csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
+ csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
+ csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
+ csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
+ csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
+ csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
+ break;
+ case 1:
+ /*
+ * This is a block-addressed SDHC card. Most
+ * interesting fields are unused and have fixed
+ * values. To avoid getting tripped by buggy cards,
+ * we assume those fixed values ourselves.
+ */
+ mmc_card_set_blockaddr(card);
+
+ csd->tacc_ns = 0; /* Unused */
+ csd->tacc_clks = 0; /* Unused */
+
+ m = UNSTUFF_BITS(resp, 99, 4);
+ e = UNSTUFF_BITS(resp, 96, 3);
+ csd->max_dtr = tran_exp[e] * tran_mant[m];
+ csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
+
+ m = UNSTUFF_BITS(resp, 48, 22);
+ csd->capacity = (1 + m) << 10;
+
+ csd->read_blkbits = 9;
+ csd->read_partial = 0;
+ csd->write_misalign = 0;
+ csd->read_misalign = 0;
+ csd->r2w_factor = 4; /* Unused */
+ csd->write_blkbits = 9;
+ csd->write_partial = 0;
+ break;
+ default:
+ printk("%s: unrecognised CSD structure version %d\n",
+ mmc_hostname(card->host), csd_struct);
+ mmc_card_set_bad(card);
+ return;
+ }
+ } else {
+ /*
+ * We only understand CSD structure v1.1 and v1.2.
+ * v1.2 has extra information in bits 15, 11 and 10.
+ */
+ csd_struct = UNSTUFF_BITS(resp, 126, 2);
+ if (csd_struct != 1 && csd_struct != 2) {
+ printk("%s: unrecognised CSD structure version %d\n",
+ mmc_hostname(card->host), csd_struct);
+ mmc_card_set_bad(card);
+ return;
+ }
+
+ csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
+ m = UNSTUFF_BITS(resp, 115, 4);
+ e = UNSTUFF_BITS(resp, 112, 3);
+ csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
+ csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
+
+ m = UNSTUFF_BITS(resp, 99, 4);
+ e = UNSTUFF_BITS(resp, 96, 3);
+ csd->max_dtr = tran_exp[e] * tran_mant[m];
+ csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
+
+ e = UNSTUFF_BITS(resp, 47, 3);
+ m = UNSTUFF_BITS(resp, 62, 12);
+ csd->capacity = (1 + m) << (e + 2);
+
+ csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
+ csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
+ csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
+ csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
+ csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
+ csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
+ csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
+ }
+}
+
+/*
+ * Given a 64-bit response, decode to our card SCR structure.
+ */
+static void mmc_decode_scr(struct mmc_card *card)
+{
+ struct sd_scr *scr = &card->scr;
+ unsigned int scr_struct;
+ u32 resp[4];
+
+ BUG_ON(!mmc_card_sd(card));
+
+ resp[3] = card->raw_scr[1];
+ resp[2] = card->raw_scr[0];
+
+ scr_struct = UNSTUFF_BITS(resp, 60, 4);
+ if (scr_struct != 0) {
+ printk("%s: unrecognised SCR structure version %d\n",
+ mmc_hostname(card->host), scr_struct);
+ mmc_card_set_bad(card);
+ return;
+ }
+
+ scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
+ scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
+}
+
+/*
+ * Allocate a new MMC card
+ */
+static struct mmc_card *
+mmc_alloc_card(struct mmc_host *host, u32 *raw_cid)
+{
+ struct mmc_card *card;
+
+ card = kmalloc(sizeof(struct mmc_card), GFP_KERNEL);
+ if (!card)
+ return ERR_PTR(-ENOMEM);
+
+ mmc_init_card(card, host);
+ memcpy(card->raw_cid, raw_cid, sizeof(card->raw_cid));
+
+ return card;
+}
+
+/*
+ * Tell attached cards to go to IDLE state
+ */
+static void mmc_idle_cards(struct mmc_host *host)
+{
+ struct mmc_command cmd;
+
+ host->ios.chip_select = MMC_CS_HIGH;
+ mmc_set_ios(host);
+
+ mmc_delay(1);
+
+ cmd.opcode = MMC_GO_IDLE_STATE;
+ cmd.arg = 0;
+ cmd.flags = MMC_RSP_NONE | MMC_CMD_BC;
+
+ mmc_wait_for_cmd(host, &cmd, 0);
+
+ mmc_delay(1);
+
+ host->ios.chip_select = MMC_CS_DONTCARE;
+ mmc_set_ios(host);
+
+ mmc_delay(1);
+}
+
+/*
+ * Apply power to the MMC stack. This is a two-stage process.
+ * First, we enable power to the card without the clock running.
+ * We then wait a bit for the power to stabilise. Finally,
+ * enable the bus drivers and clock to the card.
+ *
+ * We must _NOT_ enable the clock prior to power stablising.
+ *
+ * If a host does all the power sequencing itself, ignore the
+ * initial MMC_POWER_UP stage.
+ */
+static void mmc_power_up(struct mmc_host *host)
+{
+ int bit = fls(host->ocr_avail) - 1;
+
+ host->ios.vdd = bit;
+ host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+ host->ios.chip_select = MMC_CS_DONTCARE;
+ host->ios.power_mode = MMC_POWER_UP;
+ host->ios.bus_width = MMC_BUS_WIDTH_1;
+ host->ios.timing = MMC_TIMING_LEGACY;
+ mmc_set_ios(host);
+
+ mmc_delay(1);
+
+ host->ios.clock = host->f_min;
+ host->ios.power_mode = MMC_POWER_ON;
+ mmc_set_ios(host);
+
+ mmc_delay(2);
+}
+
+static void mmc_power_off(struct mmc_host *host)
+{
+ host->ios.clock = 0;
+ host->ios.vdd = 0;
+ host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+ host->ios.chip_select = MMC_CS_DONTCARE;
+ host->ios.power_mode = MMC_POWER_OFF;
+ host->ios.bus_width = MMC_BUS_WIDTH_1;
+ host->ios.timing = MMC_TIMING_LEGACY;
+ mmc_set_ios(host);
+}
+
+static int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
+{
+ struct mmc_command cmd;
+ int i, err = 0;
+
+ cmd.opcode = MMC_SEND_OP_COND;
+ cmd.arg = ocr;
+ cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
+
+ for (i = 100; i; i--) {
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err != MMC_ERR_NONE)
+ break;
+
+ if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
+ break;
+
+ err = MMC_ERR_TIMEOUT;
+
+ mmc_delay(10);
+ }
+
+ if (rocr)
+ *rocr = cmd.resp[0];
+
+ return err;
+}
+
+static int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
+{
+ struct mmc_command cmd;
+ int i, err = 0;
+
+ cmd.opcode = SD_APP_OP_COND;
+ cmd.arg = ocr;
+ cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
+
+ for (i = 100; i; i--) {
+ err = mmc_wait_for_app_cmd(host, 0, &cmd, CMD_RETRIES);
+ if (err != MMC_ERR_NONE)
+ break;
+
+ if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
+ break;
+
+ err = MMC_ERR_TIMEOUT;
+
+ mmc_delay(10);
+ }
+
+ if (rocr)
+ *rocr = cmd.resp[0];
+
+ return err;
+}
+
+static int mmc_send_if_cond(struct mmc_host *host, u32 ocr, int *rsd2)
+{
+ struct mmc_command cmd;
+ int err, sd2;
+ static const u8 test_pattern = 0xAA;
+
+ /*
+ * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
+ * before SD_APP_OP_COND. This command will harmlessly fail for
+ * SD 1.0 cards.
+ */
+ cmd.opcode = SD_SEND_IF_COND;
+ cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
+ cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR;
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err == MMC_ERR_NONE) {
+ if ((cmd.resp[0] & 0xFF) == test_pattern) {
+ sd2 = 1;
+ } else {
+ sd2 = 0;
+ err = MMC_ERR_FAILED;
+ }
+ } else {
+ /*
+ * Treat errors as SD 1.0 card.
+ */
+ sd2 = 0;
+ err = MMC_ERR_NONE;
+ }
+ if (rsd2)
+ *rsd2 = sd2;
+ return err;
+}
+
+/*
+ * Discover the card by requesting its CID.
+ *
+ * Create a mmc_card entry for the discovered card, assigning
+ * it an RCA, and save the raw CID for decoding later.
+ */
+static void mmc_discover_card(struct mmc_host *host)
+{
+ unsigned int err;
+
+ struct mmc_command cmd;
+
+ BUG_ON(host->card);
+
+ cmd.opcode = MMC_ALL_SEND_CID;
+ cmd.arg = 0;
+ cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
+
+ err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+ if (err == MMC_ERR_TIMEOUT) {
+ err = MMC_ERR_NONE;
+ return;
+ }
+ if (err != MMC_ERR_NONE) {
+ printk(KERN_ERR "%s: error requesting CID: %d\n",
+ mmc_hostname(host), err);
+ return;
+ }
+
+ host->card = mmc_alloc_card(host, cmd.resp);
+ if (IS_ERR(host->card)) {
+ err = PTR_ERR(host->card);
+ host->card = NULL;
+ return;
+ }
+
+ if (host->mode == MMC_MODE_SD) {
+ host->card->type = MMC_TYPE_SD;
+
+ cmd.opcode = SD_SEND_RELATIVE_ADDR;
+ cmd.arg = 0;
+ cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
+
+ err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+ if (err != MMC_ERR_NONE)
+ mmc_card_set_dead(host->card);
+ else {
+ host->card->rca = cmd.resp[0] >> 16;
+
+ if (!host->ops->get_ro) {
+ printk(KERN_WARNING "%s: host does not "
+ "support reading read-only "
+ "switch. assuming write-enable.\n",
+ mmc_hostname(host));
+ } else {
+ if (host->ops->get_ro(host))
+ mmc_card_set_readonly(host->card);
+ }
+ }
+ } else {
+ host->card->type = MMC_TYPE_MMC;
+ host->card->rca = 1;
+
+ cmd.opcode = MMC_SET_RELATIVE_ADDR;
+ cmd.arg = host->card->rca << 16;
+ cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+ err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+ if (err != MMC_ERR_NONE)
+ mmc_card_set_dead(host->card);
+ }
+}
+
+static void mmc_read_csd(struct mmc_host *host)
+{
+ struct mmc_command cmd;
+ int err;
+
+ if (!host->card)
+ return;
+ if (mmc_card_dead(host->card))
+ return;
+
+ cmd.opcode = MMC_SEND_CSD;
+ cmd.arg = host->card->rca << 16;
+ cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
+
+ err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+ if (err != MMC_ERR_NONE) {
+ mmc_card_set_dead(host->card);
+ return;
+ }
+
+ memcpy(host->card->raw_csd, cmd.resp, sizeof(host->card->raw_csd));
+
+ mmc_decode_csd(host->card);
+ mmc_decode_cid(host->card);
+}
+
+static void mmc_process_ext_csd(struct mmc_host *host)
+{
+ int err;
+
+ struct mmc_request mrq;
+ struct mmc_command cmd;
+ struct mmc_data data;
+
+ u8 *ext_csd;
+ struct scatterlist sg;
+
+ if (!host->card)
+ return;
+ if (mmc_card_dead(host->card))
+ return;
+ if (mmc_card_sd(host->card))
+ return;
+ if (host->card->csd.mmca_vsn < CSD_SPEC_VER_4)
+ return;
+
+ /*
+ * As the ext_csd is so large and mostly unused, we don't store the
+ * raw block in mmc_card.
+ */
+ ext_csd = kmalloc(512, GFP_KERNEL);
+ if (!ext_csd) {
+ printk("%s: could not allocate a buffer to receive the ext_csd."
+ "mmc v4 cards will be treated as v3.\n",
+ mmc_hostname(host));
+ return;
+ }
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+
+ cmd.opcode = MMC_SEND_EXT_CSD;
+ cmd.arg = 0;
+ cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+
+ memset(&data, 0, sizeof(struct mmc_data));
+
+ mmc_set_data_timeout(&data, host->card, 0);
+
+ data.blksz = 512;
+ data.blocks = 1;
+ data.flags = MMC_DATA_READ;
+ data.sg = &sg;
+ data.sg_len = 1;
+
+ memset(&mrq, 0, sizeof(struct mmc_request));
+
+ mrq.cmd = &cmd;
+ mrq.data = &data;
+
+ sg_init_one(&sg, ext_csd, 512);
+
+ mmc_wait_for_req(host, &mrq);
+
+ if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
+ if (host->card->csd.capacity == (4096 * 512)) {
+ printk(KERN_ERR "%s: unable to read EXT_CSD "
+ "on a possible high capacity card. "
+ "Card will be ignored.\n",
+ mmc_hostname(host));
+ mmc_card_set_dead(host->card);
+ } else {
+ printk(KERN_WARNING "%s: unable to read "
+ "EXT_CSD, performance might "
+ "suffer.\n",
+ mmc_hostname(host));
+ }
+ goto out;
+ }
+
+ host->card->ext_csd.sectors =
+ ext_csd[EXT_CSD_SEC_CNT + 0] << 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;
+ if (host->card->ext_csd.sectors)
+ mmc_card_set_blockaddr(host->card);
+
+ switch (ext_csd[EXT_CSD_CARD_TYPE]) {
+ case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26:
+ host->card->ext_csd.hs_max_dtr = 52000000;
+ break;
+ case EXT_CSD_CARD_TYPE_26:
+ host->card->ext_csd.hs_max_dtr = 26000000;
+ break;
+ default:
+ /* MMC v4 spec says this cannot happen */
+ printk("%s: card is mmc v4 but doesn't support "
+ "any high-speed modes.\n",
+ mmc_hostname(host));
+ goto out;
+ }
+
+ if (host->caps & MMC_CAP_MMC_HIGHSPEED) {
+ /* Activate highspeed support. */
+ cmd.opcode = MMC_SWITCH;
+ cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+ (EXT_CSD_HS_TIMING << 16) |
+ (1 << 8) |
+ EXT_CSD_CMD_SET_NORMAL;
+ cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
+
+ err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+ if (err != MMC_ERR_NONE) {
+ printk("%s: failed to switch card to mmc v4 "
+ "high-speed mode.\n",
+ mmc_hostname(host));
+ goto out;
+ }
+
+ mmc_card_set_highspeed(host->card);
+
+ host->ios.timing = MMC_TIMING_MMC_HS;
+ mmc_set_ios(host);
+ }
+
+ /* Check for host support for wide-bus modes. */
+ if (host->caps & MMC_CAP_4_BIT_DATA) {
+ /* Activate 4-bit support. */
+ cmd.opcode = MMC_SWITCH;
+ cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+ (EXT_CSD_BUS_WIDTH << 16) |
+ (EXT_CSD_BUS_WIDTH_4 << 8) |
+ EXT_CSD_CMD_SET_NORMAL;
+ cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
+
+ err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+ if (err != MMC_ERR_NONE) {
+ printk("%s: failed to switch card to "
+ "mmc v4 4-bit bus mode.\n",
+ mmc_hostname(host));
+ goto out;
+ }
+
+ host->ios.bus_width = MMC_BUS_WIDTH_4;
+ mmc_set_ios(host);
+ }
+
+out:
+ kfree(ext_csd);
+}
+
+static void mmc_read_scr(struct mmc_host *host)
+{
+ int err;
+ struct mmc_request mrq;
+ struct mmc_command cmd;
+ struct mmc_data data;
+ struct scatterlist sg;
+
+ if (!host->card)
+ return;
+ if (mmc_card_dead(host->card))
+ return;
+ if (!mmc_card_sd(host->card))
+ return;
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+
+ cmd.opcode = MMC_APP_CMD;
+ cmd.arg = host->card->rca << 16;
+ cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if ((err != MMC_ERR_NONE) || !(cmd.resp[0] & R1_APP_CMD)) {
+ mmc_card_set_dead(host->card);
+ return;
+ }
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+
+ cmd.opcode = SD_APP_SEND_SCR;
+ cmd.arg = 0;
+ cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+
+ memset(&data, 0, sizeof(struct mmc_data));
+
+ mmc_set_data_timeout(&data, host->card, 0);
+
+ data.blksz = 1 << 3;
+ data.blocks = 1;
+ data.flags = MMC_DATA_READ;
+ data.sg = &sg;
+ data.sg_len = 1;
+
+ memset(&mrq, 0, sizeof(struct mmc_request));
+
+ mrq.cmd = &cmd;
+ mrq.data = &data;
+
+ sg_init_one(&sg, (u8*)host->card->raw_scr, 8);
+
+ mmc_wait_for_req(host, &mrq);
+
+ if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
+ mmc_card_set_dead(host->card);
+ return;
+ }
+
+ host->card->raw_scr[0] = ntohl(host->card->raw_scr[0]);
+ host->card->raw_scr[1] = ntohl(host->card->raw_scr[1]);
+
+ mmc_decode_scr(host->card);
+}
+
+static void mmc_read_switch_caps(struct mmc_host *host)
+{
+ struct mmc_request mrq;
+ struct mmc_command cmd;
+ struct mmc_data data;
+ unsigned char *status;
+ struct scatterlist sg;
+
+ if (!(host->caps & MMC_CAP_SD_HIGHSPEED))
+ return;
+
+ if (!host->card)
+ return;
+ if (mmc_card_dead(host->card))
+ return;
+ if (!mmc_card_sd(host->card))
+ return;
+ if (host->card->scr.sda_vsn < SCR_SPEC_VER_1)
+ return;
+
+ status = kmalloc(64, GFP_KERNEL);
+ if (!status) {
+ printk(KERN_WARNING "%s: Unable to allocate buffer for "
+ "reading switch capabilities.\n",
+ mmc_hostname(host));
+ return;
+ }
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+
+ cmd.opcode = SD_SWITCH;
+ cmd.arg = 0x00FFFFF1;
+ cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+
+ memset(&data, 0, sizeof(struct mmc_data));
+
+ mmc_set_data_timeout(&data, host->card, 0);
+
+ data.blksz = 64;
+ data.blocks = 1;
+ data.flags = MMC_DATA_READ;
+ data.sg = &sg;
+ data.sg_len = 1;
+
+ memset(&mrq, 0, sizeof(struct mmc_request));
+
+ mrq.cmd = &cmd;
+ mrq.data = &data;
+
+ sg_init_one(&sg, status, 64);
+
+ mmc_wait_for_req(host, &mrq);
+
+ if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
+ printk("%s: unable to read switch capabilities, "
+ "performance might suffer.\n",
+ mmc_hostname(host));
+ goto out;
+ }
+
+ if (status[13] & 0x02)
+ host->card->sw_caps.hs_max_dtr = 50000000;
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+
+ cmd.opcode = SD_SWITCH;
+ cmd.arg = 0x80FFFFF1;
+ cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+
+ memset(&data, 0, sizeof(struct mmc_data));
+
+ mmc_set_data_timeout(&data, host->card, 0);
+
+ data.blksz = 64;
+ data.blocks = 1;
+ data.flags = MMC_DATA_READ;
+ data.sg = &sg;
+ data.sg_len = 1;
+
+ memset(&mrq, 0, sizeof(struct mmc_request));
+
+ mrq.cmd = &cmd;
+ mrq.data = &data;
+
+ sg_init_one(&sg, status, 64);
+
+ mmc_wait_for_req(host, &mrq);
+
+ if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE ||
+ (status[16] & 0xF) != 1) {
+ printk(KERN_WARNING "%s: Problem switching card "
+ "into high-speed mode!\n",
+ mmc_hostname(host));
+ goto out;
+ }
+
+ mmc_card_set_highspeed(host->card);
+
+ host->ios.timing = MMC_TIMING_SD_HS;
+ mmc_set_ios(host);
+
+out:
+ kfree(status);
+}
+
+static unsigned int mmc_calculate_clock(struct mmc_host *host)
+{
+ unsigned int max_dtr = host->f_max;
+
+ if (host->card && !mmc_card_dead(host->card)) {
+ if (mmc_card_highspeed(host->card) && mmc_card_sd(host->card)) {
+ if (max_dtr > host->card->sw_caps.hs_max_dtr)
+ max_dtr = host->card->sw_caps.hs_max_dtr;
+ } else if (mmc_card_highspeed(host->card) && !mmc_card_sd(host->card)) {
+ if (max_dtr > host->card->ext_csd.hs_max_dtr)
+ max_dtr = host->card->ext_csd.hs_max_dtr;
+ } else if (max_dtr > host->card->csd.max_dtr) {
+ max_dtr = host->card->csd.max_dtr;
+ }
+ }
+
+ pr_debug("%s: selected %d.%03dMHz transfer rate\n",
+ mmc_hostname(host),
+ max_dtr / 1000000, (max_dtr / 1000) % 1000);
+
+ return max_dtr;
+}
+
+/*
+ * Check whether cards we already know about are still present.
+ * We do this by requesting status, and checking whether a card
+ * responds.
+ *
+ * A request for status does not cause a state change in data
+ * transfer mode.
+ */
+static void mmc_check_card(struct mmc_card *card)
+{
+ struct mmc_command cmd;
+ int err;
+
+ BUG_ON(!card);
+
+ cmd.opcode = MMC_SEND_STATUS;
+ cmd.arg = card->rca << 16;
+ cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+ err = mmc_wait_for_cmd(card->host, &cmd, CMD_RETRIES);
+ if (err == MMC_ERR_NONE)
+ return;
+
+ mmc_card_set_dead(card);
+}
+
+static void mmc_setup(struct mmc_host *host)
+{
+ int err;
+ u32 ocr;
+
+ host->mode = MMC_MODE_SD;
+
+ mmc_power_up(host);
+ mmc_idle_cards(host);
+
+ err = mmc_send_if_cond(host, host->ocr_avail, NULL);
+ if (err != MMC_ERR_NONE) {
+ return;
+ }
+ err = mmc_send_app_op_cond(host, 0, &ocr);
+
+ /*
+ * If we fail to detect any SD cards then try
+ * searching for MMC cards.
+ */
+ if (err != MMC_ERR_NONE) {
+ host->mode = MMC_MODE_MMC;
+
+ err = mmc_send_op_cond(host, 0, &ocr);
+ if (err != MMC_ERR_NONE)
+ return;
+ }
+
+ host->ocr = mmc_select_voltage(host, ocr);
+
+ if (host->ocr == 0)
+ return;
+
+ /*
+ * Since we're changing the OCR value, we seem to
+ * need to tell some cards to go back to the idle
+ * state. We wait 1ms to give cards time to
+ * respond.
+ */
+ mmc_idle_cards(host);
+
+ /*
+ * Send the selected OCR multiple times... until the cards
+ * all get the idea that they should be ready for CMD2.
+ * (My SanDisk card seems to need this.)
+ */
+ if (host->mode == MMC_MODE_SD) {
+ int err, sd2;
+ err = mmc_send_if_cond(host, host->ocr, &sd2);
+ if (err == MMC_ERR_NONE) {
+ /*
+ * If SD_SEND_IF_COND indicates an SD 2.0
+ * compliant card and we should set bit 30
+ * of the ocr to indicate that we can handle
+ * block-addressed SDHC cards.
+ */
+ mmc_send_app_op_cond(host, host->ocr | (sd2 << 30), NULL);
+ }
+ } else {
+ /* The extra bit indicates that we support high capacity */
+ mmc_send_op_cond(host, host->ocr | (1 << 30), NULL);
+ }
+
+ mmc_discover_card(host);
+
+ /*
+ * Ok, now switch to push-pull mode.
+ */
+ host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
+ mmc_set_ios(host);
+
+ mmc_read_csd(host);
+
+ if (host->card && !mmc_card_dead(host->card)) {
+ err = mmc_select_card(host->card);
+ if (err != MMC_ERR_NONE)
+ mmc_card_set_dead(host->card);
+ }
+
+ if (host->mode == MMC_MODE_SD) {
+ mmc_read_scr(host);
+ mmc_read_switch_caps(host);
+ } else
+ mmc_process_ext_csd(host);
+}
+
+
+/**
+ * mmc_detect_change - process change of state on a MMC socket
+ * @host: host which changed state.
+ * @delay: optional delay to wait before detection (jiffies)
+ *
+ * All we know is that card(s) have been inserted or removed
+ * from the socket(s). We don't know which socket or cards.
+ */
+void mmc_detect_change(struct mmc_host *host, unsigned long delay)
+{
+#ifdef CONFIG_MMC_DEBUG
+ mmc_claim_host(host);
+ BUG_ON(host->removed);
+ mmc_release_host(host);
+#endif
+
+ mmc_schedule_delayed_work(&host->detect, delay);
+}
+
+EXPORT_SYMBOL(mmc_detect_change);
+
+
+static void mmc_rescan(struct work_struct *work)
+{
+ struct mmc_host *host =
+ container_of(work, struct mmc_host, detect.work);
+
+ mmc_claim_host(host);
+
+ /*
+ * Check for removed card and newly inserted ones. We check for
+ * removed cards first so we can intelligently re-select the VDD.
+ */
+ if (host->card) {
+ mmc_check_card(host->card);
+
+ mmc_release_host(host);
+
+ if (mmc_card_dead(host->card)) {
+ mmc_remove_card(host->card);
+ host->card = NULL;
+ }
+
+ goto out;
+ }
+
+ mmc_setup(host);
+
+ if (host->card && !mmc_card_dead(host->card)) {
+ /*
+ * (Re-)calculate the fastest clock rate which the
+ * attached cards and the host support.
+ */
+ host->ios.clock = mmc_calculate_clock(host);
+ mmc_set_ios(host);
+ }
+
+ mmc_release_host(host);
+
+ /*
+ * If this is a new and good card, register it.
+ */
+ if (host->card && !mmc_card_dead(host->card)) {
+ if (mmc_register_card(host->card))
+ mmc_card_set_dead(host->card);
+ }
+
+ /*
+ * If this card is dead, destroy it.
+ */
+ if (host->card && mmc_card_dead(host->card)) {
+ mmc_remove_card(host->card);
+ host->card = NULL;
+ }
+
+out:
+ /*
+ * If we discover that there are no cards on the
+ * bus, turn off the clock and power down.
+ */
+ if (!host->card)
+ mmc_power_off(host);
+}
+
+
+/**
+ * mmc_alloc_host - initialise the per-host structure.
+ * @extra: sizeof private data structure
+ * @dev: pointer to host device model structure
+ *
+ * Initialise the per-host structure.
+ */
+struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
+{
+ struct mmc_host *host;
+
+ host = mmc_alloc_host_sysfs(extra, dev);
+ if (host) {
+ spin_lock_init(&host->lock);
+ init_waitqueue_head(&host->wq);
+ INIT_DELAYED_WORK(&host->detect, mmc_rescan);
+
+ /*
+ * By default, hosts do not support SGIO or large requests.
+ * They have to set these according to their abilities.
+ */
+ host->max_hw_segs = 1;
+ host->max_phys_segs = 1;
+ host->max_seg_size = PAGE_CACHE_SIZE;
+
+ host->max_req_size = PAGE_CACHE_SIZE;
+ host->max_blk_size = 512;
+ host->max_blk_count = PAGE_CACHE_SIZE / 512;
+ }
+
+ return host;
+}
+
+EXPORT_SYMBOL(mmc_alloc_host);
+
+/**
+ * mmc_add_host - initialise host hardware
+ * @host: mmc host
+ */
+int mmc_add_host(struct mmc_host *host)
+{
+ int ret;
+
+ ret = mmc_add_host_sysfs(host);
+ if (ret == 0) {
+ mmc_power_off(host);
+ mmc_detect_change(host, 0);
+ }
+
+ return ret;
+}
+
+EXPORT_SYMBOL(mmc_add_host);
+
+/**
+ * mmc_remove_host - remove host hardware
+ * @host: mmc host
+ *
+ * Unregister and remove all cards associated with this host,
+ * and power down the MMC bus.
+ */
+void mmc_remove_host(struct mmc_host *host)
+{
+#ifdef CONFIG_MMC_DEBUG
+ mmc_claim_host(host);
+ host->removed = 1;
+ mmc_release_host(host);
+#endif
+
+ mmc_flush_scheduled_work();
+
+ if (host->card) {
+ mmc_remove_card(host->card);
+ host->card = NULL;
+ }
+
+ mmc_power_off(host);
+ mmc_remove_host_sysfs(host);
+}
+
+EXPORT_SYMBOL(mmc_remove_host);
+
+/**
+ * mmc_free_host - free the host structure
+ * @host: mmc host
+ *
+ * Free the host once all references to it have been dropped.
+ */
+void mmc_free_host(struct mmc_host *host)
+{
+ mmc_free_host_sysfs(host);
+}
+
+EXPORT_SYMBOL(mmc_free_host);
+
+#ifdef CONFIG_PM
+
+/**
+ * mmc_suspend_host - suspend a host
+ * @host: mmc host
+ * @state: suspend mode (PM_SUSPEND_xxx)
+ */
+int mmc_suspend_host(struct mmc_host *host, pm_message_t state)
+{
+ mmc_flush_scheduled_work();
+
+ if (host->card) {
+ mmc_remove_card(host->card);
+ host->card = NULL;
+ }
+
+ mmc_power_off(host);
+
+ return 0;
+}
+
+EXPORT_SYMBOL(mmc_suspend_host);
+
+/**
+ * mmc_resume_host - resume a previously suspended host
+ * @host: mmc host
+ */
+int mmc_resume_host(struct mmc_host *host)
+{
+ mmc_rescan(&host->detect.work);
+
+ return 0;
+}
+
+EXPORT_SYMBOL(mmc_resume_host);
+
+#endif
+
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * linux/drivers/mmc/core/core.h
+ *
+ * Copyright (C) 2003 Russell King, All Rights Reserved.
+ *
+ * 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.
+ */
+#ifndef _MMC_CORE_H
+#define _MMC_CORE_H
+/* core-internal functions */
+void mmc_init_card(struct mmc_card *card, struct mmc_host *host);
+int mmc_register_card(struct mmc_card *card);
+void mmc_remove_card(struct mmc_card *card);
+
+struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev);
+int mmc_add_host_sysfs(struct mmc_host *host);
+void mmc_remove_host_sysfs(struct mmc_host *host);
+void mmc_free_host_sysfs(struct mmc_host *host);
+
+int mmc_schedule_work(struct work_struct *work);
+int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay);
+void mmc_flush_scheduled_work(void);
+#endif
--- /dev/null
+/*
+ * linux/drivers/mmc/core/sysfs.c
+ *
+ * Copyright (C) 2003 Russell King, All Rights Reserved.
+ *
+ * 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.
+ *
+ * MMC sysfs/driver model support.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/idr.h>
+#include <linux/workqueue.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+
+#include "core.h"
+
+#define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev)
+#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
+#define cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev)
+
+#define MMC_ATTR(name, fmt, args...) \
+static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
+{ \
+ struct mmc_card *card = dev_to_mmc_card(dev); \
+ return sprintf(buf, fmt, args); \
+}
+
+MMC_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
+ card->raw_cid[2], card->raw_cid[3]);
+MMC_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
+ card->raw_csd[2], card->raw_csd[3]);
+MMC_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
+MMC_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
+MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
+MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
+MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid);
+MMC_ATTR(name, "%s\n", card->cid.prod_name);
+MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid);
+MMC_ATTR(serial, "0x%08x\n", card->cid.serial);
+
+#define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
+
+static struct device_attribute mmc_dev_attrs[] = {
+ MMC_ATTR_RO(cid),
+ MMC_ATTR_RO(csd),
+ MMC_ATTR_RO(date),
+ MMC_ATTR_RO(fwrev),
+ MMC_ATTR_RO(hwrev),
+ MMC_ATTR_RO(manfid),
+ MMC_ATTR_RO(name),
+ MMC_ATTR_RO(oemid),
+ MMC_ATTR_RO(serial),
+ __ATTR_NULL
+};
+
+static struct device_attribute mmc_dev_attr_scr = MMC_ATTR_RO(scr);
+
+
+static void mmc_release_card(struct device *dev)
+{
+ struct mmc_card *card = dev_to_mmc_card(dev);
+
+ kfree(card);
+}
+
+/*
+ * This currently matches any MMC driver to any MMC card - drivers
+ * themselves make the decision whether to drive this card in their
+ * probe method. However, we force "bad" cards to fail.
+ */
+static int mmc_bus_match(struct device *dev, struct device_driver *drv)
+{
+ struct mmc_card *card = dev_to_mmc_card(dev);
+ return !mmc_card_bad(card);
+}
+
+static int
+mmc_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf,
+ int buf_size)
+{
+ struct mmc_card *card = dev_to_mmc_card(dev);
+ char ccc[13];
+ int retval = 0, i = 0, length = 0;
+
+#define add_env(fmt,val) do { \
+ retval = add_uevent_var(envp, num_envp, &i, \
+ buf, buf_size, &length, \
+ fmt, val); \
+ if (retval) \
+ return retval; \
+} while (0);
+
+ for (i = 0; i < 12; i++)
+ ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
+ ccc[12] = '\0';
+
+ add_env("MMC_CCC=%s", ccc);
+ add_env("MMC_MANFID=%06x", card->cid.manfid);
+ add_env("MMC_NAME=%s", mmc_card_name(card));
+ add_env("MMC_OEMID=%04x", card->cid.oemid);
+#undef add_env
+ envp[i] = NULL;
+
+ return 0;
+}
+
+static int mmc_bus_suspend(struct device *dev, pm_message_t state)
+{
+ struct mmc_driver *drv = to_mmc_driver(dev->driver);
+ struct mmc_card *card = dev_to_mmc_card(dev);
+ int ret = 0;
+
+ if (dev->driver && drv->suspend)
+ ret = drv->suspend(card, state);
+ return ret;
+}
+
+static int mmc_bus_resume(struct device *dev)
+{
+ struct mmc_driver *drv = to_mmc_driver(dev->driver);
+ struct mmc_card *card = dev_to_mmc_card(dev);
+ int ret = 0;
+
+ if (dev->driver && drv->resume)
+ ret = drv->resume(card);
+ return ret;
+}
+
+static int mmc_bus_probe(struct device *dev)
+{
+ struct mmc_driver *drv = to_mmc_driver(dev->driver);
+ struct mmc_card *card = dev_to_mmc_card(dev);
+
+ return drv->probe(card);
+}
+
+static int mmc_bus_remove(struct device *dev)
+{
+ struct mmc_driver *drv = to_mmc_driver(dev->driver);
+ struct mmc_card *card = dev_to_mmc_card(dev);
+
+ drv->remove(card);
+
+ return 0;
+}
+
+static struct bus_type mmc_bus_type = {
+ .name = "mmc",
+ .dev_attrs = mmc_dev_attrs,
+ .match = mmc_bus_match,
+ .uevent = mmc_bus_uevent,
+ .probe = mmc_bus_probe,
+ .remove = mmc_bus_remove,
+ .suspend = mmc_bus_suspend,
+ .resume = mmc_bus_resume,
+};
+
+/**
+ * mmc_register_driver - register a media driver
+ * @drv: MMC media driver
+ */
+int mmc_register_driver(struct mmc_driver *drv)
+{
+ drv->drv.bus = &mmc_bus_type;
+ return driver_register(&drv->drv);
+}
+
+EXPORT_SYMBOL(mmc_register_driver);
+
+/**
+ * mmc_unregister_driver - unregister a media driver
+ * @drv: MMC media driver
+ */
+void mmc_unregister_driver(struct mmc_driver *drv)
+{
+ drv->drv.bus = &mmc_bus_type;
+ driver_unregister(&drv->drv);
+}
+
+EXPORT_SYMBOL(mmc_unregister_driver);
+
+
+/*
+ * Internal function. Initialise a MMC card structure.
+ */
+void mmc_init_card(struct mmc_card *card, struct mmc_host *host)
+{
+ memset(card, 0, sizeof(struct mmc_card));
+ card->host = host;
+ device_initialize(&card->dev);
+ card->dev.parent = mmc_classdev(host);
+ card->dev.bus = &mmc_bus_type;
+ card->dev.release = mmc_release_card;
+}
+
+/*
+ * Internal function. Register a new MMC card with the driver model.
+ */
+int mmc_register_card(struct mmc_card *card)
+{
+ int ret;
+
+ snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
+ "%s:%04x", mmc_hostname(card->host), card->rca);
+
+ ret = device_add(&card->dev);
+ if (ret == 0) {
+ if (mmc_card_sd(card)) {
+ ret = device_create_file(&card->dev, &mmc_dev_attr_scr);
+ if (ret)
+ device_del(&card->dev);
+ }
+ }
+ if (ret == 0)
+ mmc_card_set_present(card);
+ return ret;
+}
+
+/*
+ * Internal function. Unregister a new MMC card with the
+ * driver model, and (eventually) free it.
+ */
+void mmc_remove_card(struct mmc_card *card)
+{
+ if (mmc_card_present(card)) {
+ if (mmc_card_sd(card))
+ device_remove_file(&card->dev, &mmc_dev_attr_scr);
+
+ device_del(&card->dev);
+ }
+
+ put_device(&card->dev);
+}
+
+
+static void mmc_host_classdev_release(struct device *dev)
+{
+ struct mmc_host *host = cls_dev_to_mmc_host(dev);
+ kfree(host);
+}
+
+static struct class mmc_host_class = {
+ .name = "mmc_host",
+ .dev_release = mmc_host_classdev_release,
+};
+
+static DEFINE_IDR(mmc_host_idr);
+static DEFINE_SPINLOCK(mmc_host_lock);
+
+/*
+ * Internal function. Allocate a new MMC host.
+ */
+struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev)
+{
+ struct mmc_host *host;
+
+ host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
+ if (host) {
+ memset(host, 0, sizeof(struct mmc_host) + extra);
+
+ host->parent = dev;
+ host->class_dev.parent = dev;
+ host->class_dev.class = &mmc_host_class;
+ device_initialize(&host->class_dev);
+ }
+
+ return host;
+}
+
+/*
+ * Internal function. Register a new MMC host with the MMC class.
+ */
+int mmc_add_host_sysfs(struct mmc_host *host)
+{
+ int err;
+
+ if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
+ return -ENOMEM;
+
+ spin_lock(&mmc_host_lock);
+ err = idr_get_new(&mmc_host_idr, host, &host->index);
+ spin_unlock(&mmc_host_lock);
+ if (err)
+ return err;
+
+ snprintf(host->class_dev.bus_id, BUS_ID_SIZE,
+ "mmc%d", host->index);
+
+ return device_add(&host->class_dev);
+}
+
+/*
+ * Internal function. Unregister a MMC host with the MMC class.
+ */
+void mmc_remove_host_sysfs(struct mmc_host *host)
+{
+ device_del(&host->class_dev);
+
+ spin_lock(&mmc_host_lock);
+ idr_remove(&mmc_host_idr, host->index);
+ spin_unlock(&mmc_host_lock);
+}
+
+/*
+ * Internal function. Free a MMC host.
+ */
+void mmc_free_host_sysfs(struct mmc_host *host)
+{
+ put_device(&host->class_dev);
+}
+
+static struct workqueue_struct *workqueue;
+
+/*
+ * Internal function. Schedule delayed work in the MMC work queue.
+ */
+int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay)
+{
+ return queue_delayed_work(workqueue, work, delay);
+}
+
+/*
+ * Internal function. Flush all scheduled work from the MMC work queue.
+ */
+void mmc_flush_scheduled_work(void)
+{
+ flush_workqueue(workqueue);
+}
+
+static int __init mmc_init(void)
+{
+ int ret;
+
+ workqueue = create_singlethread_workqueue("kmmcd");
+ if (!workqueue)
+ return -ENOMEM;
+
+ ret = bus_register(&mmc_bus_type);
+ if (ret == 0) {
+ ret = class_register(&mmc_host_class);
+ if (ret)
+ bus_unregister(&mmc_bus_type);
+ }
+ return ret;
+}
+
+static void __exit mmc_exit(void)
+{
+ class_unregister(&mmc_host_class);
+ bus_unregister(&mmc_bus_type);
+ destroy_workqueue(workqueue);
+}
+
+module_init(mmc_init);
+module_exit(mmc_exit);
+++ /dev/null
-/*
- * linux/drivers/mmc/mmc.c
- *
- * Copyright (C) 2003-2004 Russell King, All Rights Reserved.
- * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved.
- * Copyright (C) 2005-2007 Pierre Ossman, All Rights Reserved.
- * MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
- *
- * 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 <linux/module.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/completion.h>
-#include <linux/device.h>
-#include <linux/delay.h>
-#include <linux/pagemap.h>
-#include <linux/err.h>
-#include <asm/scatterlist.h>
-#include <linux/scatterlist.h>
-
-#include <linux/mmc/card.h>
-#include <linux/mmc/host.h>
-#include <linux/mmc/protocol.h>
-
-#include "mmc.h"
-
-#define CMD_RETRIES 3
-
-/*
- * OCR Bit positions to 10s of Vdd mV.
- */
-static const unsigned short mmc_ocr_bit_to_vdd[] = {
- 150, 155, 160, 165, 170, 180, 190, 200,
- 210, 220, 230, 240, 250, 260, 270, 280,
- 290, 300, 310, 320, 330, 340, 350, 360
-};
-
-static const unsigned int tran_exp[] = {
- 10000, 100000, 1000000, 10000000,
- 0, 0, 0, 0
-};
-
-static const unsigned char tran_mant[] = {
- 0, 10, 12, 13, 15, 20, 25, 30,
- 35, 40, 45, 50, 55, 60, 70, 80,
-};
-
-static const unsigned int tacc_exp[] = {
- 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000,
-};
-
-static const unsigned int tacc_mant[] = {
- 0, 10, 12, 13, 15, 20, 25, 30,
- 35, 40, 45, 50, 55, 60, 70, 80,
-};
-
-
-/**
- * mmc_request_done - finish processing an MMC request
- * @host: MMC host which completed request
- * @mrq: MMC request which request
- *
- * MMC drivers should call this function when they have completed
- * their processing of a request.
- */
-void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
-{
- struct mmc_command *cmd = mrq->cmd;
- int err = cmd->error;
-
- pr_debug("%s: req done (CMD%u): %d/%d/%d: %08x %08x %08x %08x\n",
- mmc_hostname(host), cmd->opcode, err,
- mrq->data ? mrq->data->error : 0,
- mrq->stop ? mrq->stop->error : 0,
- cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
-
- if (err && cmd->retries) {
- cmd->retries--;
- cmd->error = 0;
- host->ops->request(host, mrq);
- } else if (mrq->done) {
- mrq->done(mrq);
- }
-}
-
-EXPORT_SYMBOL(mmc_request_done);
-
-/**
- * mmc_start_request - start a command on a host
- * @host: MMC host to start command on
- * @mrq: MMC request to start
- *
- * Queue a command on the specified host. We expect the
- * caller to be holding the host lock with interrupts disabled.
- */
-void
-mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
-{
-#ifdef CONFIG_MMC_DEBUG
- unsigned int i, sz;
-#endif
-
- pr_debug("%s: starting CMD%u arg %08x flags %08x\n",
- mmc_hostname(host), mrq->cmd->opcode,
- mrq->cmd->arg, mrq->cmd->flags);
-
- WARN_ON(!host->claimed);
-
- mrq->cmd->error = 0;
- mrq->cmd->mrq = mrq;
- if (mrq->data) {
- BUG_ON(mrq->data->blksz > host->max_blk_size);
- BUG_ON(mrq->data->blocks > host->max_blk_count);
- BUG_ON(mrq->data->blocks * mrq->data->blksz >
- host->max_req_size);
-
-#ifdef CONFIG_MMC_DEBUG
- sz = 0;
- for (i = 0;i < mrq->data->sg_len;i++)
- sz += mrq->data->sg[i].length;
- BUG_ON(sz != mrq->data->blocks * mrq->data->blksz);
-#endif
-
- mrq->cmd->data = mrq->data;
- mrq->data->error = 0;
- mrq->data->mrq = mrq;
- if (mrq->stop) {
- mrq->data->stop = mrq->stop;
- mrq->stop->error = 0;
- mrq->stop->mrq = mrq;
- }
- }
- host->ops->request(host, mrq);
-}
-
-EXPORT_SYMBOL(mmc_start_request);
-
-static void mmc_wait_done(struct mmc_request *mrq)
-{
- complete(mrq->done_data);
-}
-
-int mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
-{
- DECLARE_COMPLETION_ONSTACK(complete);
-
- mrq->done_data = &complete;
- mrq->done = mmc_wait_done;
-
- mmc_start_request(host, mrq);
-
- wait_for_completion(&complete);
-
- return 0;
-}
-
-EXPORT_SYMBOL(mmc_wait_for_req);
-
-/**
- * mmc_wait_for_cmd - start a command and wait for completion
- * @host: MMC host to start command
- * @cmd: MMC command to start
- * @retries: maximum number of retries
- *
- * Start a new MMC command for a host, and wait for the command
- * to complete. Return any error that occurred while the command
- * was executing. Do not attempt to parse the response.
- */
-int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries)
-{
- struct mmc_request mrq;
-
- BUG_ON(!host->claimed);
-
- memset(&mrq, 0, sizeof(struct mmc_request));
-
- memset(cmd->resp, 0, sizeof(cmd->resp));
- cmd->retries = retries;
-
- mrq.cmd = cmd;
- cmd->data = NULL;
-
- mmc_wait_for_req(host, &mrq);
-
- return cmd->error;
-}
-
-EXPORT_SYMBOL(mmc_wait_for_cmd);
-
-/**
- * mmc_wait_for_app_cmd - start an application command and wait for
- completion
- * @host: MMC host to start command
- * @rca: RCA to send MMC_APP_CMD to
- * @cmd: MMC command to start
- * @retries: maximum number of retries
- *
- * Sends a MMC_APP_CMD, checks the card response, sends the command
- * in the parameter and waits for it to complete. Return any error
- * that occurred while the command was executing. Do not attempt to
- * parse the response.
- */
-int mmc_wait_for_app_cmd(struct mmc_host *host, unsigned int rca,
- struct mmc_command *cmd, int retries)
-{
- struct mmc_request mrq;
- struct mmc_command appcmd;
-
- int i, err;
-
- BUG_ON(!host->claimed);
- BUG_ON(retries < 0);
-
- err = MMC_ERR_INVALID;
-
- /*
- * We have to resend MMC_APP_CMD for each attempt so
- * we cannot use the retries field in mmc_command.
- */
- for (i = 0;i <= retries;i++) {
- memset(&mrq, 0, sizeof(struct mmc_request));
-
- appcmd.opcode = MMC_APP_CMD;
- appcmd.arg = rca << 16;
- appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
- appcmd.retries = 0;
- memset(appcmd.resp, 0, sizeof(appcmd.resp));
- appcmd.data = NULL;
-
- mrq.cmd = &appcmd;
- appcmd.data = NULL;
-
- mmc_wait_for_req(host, &mrq);
-
- if (appcmd.error) {
- err = appcmd.error;
- continue;
- }
-
- /* Check that card supported application commands */
- if (!(appcmd.resp[0] & R1_APP_CMD))
- return MMC_ERR_FAILED;
-
- memset(&mrq, 0, sizeof(struct mmc_request));
-
- memset(cmd->resp, 0, sizeof(cmd->resp));
- cmd->retries = 0;
-
- mrq.cmd = cmd;
- cmd->data = NULL;
-
- mmc_wait_for_req(host, &mrq);
-
- err = cmd->error;
- if (cmd->error == MMC_ERR_NONE)
- break;
- }
-
- return err;
-}
-
-EXPORT_SYMBOL(mmc_wait_for_app_cmd);
-
-/**
- * mmc_set_data_timeout - set the timeout for a data command
- * @data: data phase for command
- * @card: the MMC card associated with the data transfer
- * @write: flag to differentiate reads from writes
- */
-void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card,
- int write)
-{
- unsigned int mult;
-
- /*
- * SD cards use a 100 multiplier rather than 10
- */
- mult = mmc_card_sd(card) ? 100 : 10;
-
- /*
- * Scale up the multiplier (and therefore the timeout) by
- * the r2w factor for writes.
- */
- if (write)
- mult <<= card->csd.r2w_factor;
-
- data->timeout_ns = card->csd.tacc_ns * mult;
- data->timeout_clks = card->csd.tacc_clks * mult;
-
- /*
- * SD cards also have an upper limit on the timeout.
- */
- if (mmc_card_sd(card)) {
- unsigned int timeout_us, limit_us;
-
- timeout_us = data->timeout_ns / 1000;
- timeout_us += data->timeout_clks * 1000 /
- (card->host->ios.clock / 1000);
-
- if (write)
- limit_us = 250000;
- else
- limit_us = 100000;
-
- /*
- * SDHC cards always use these fixed values.
- */
- if (timeout_us > limit_us || mmc_card_blockaddr(card)) {
- data->timeout_ns = limit_us * 1000;
- data->timeout_clks = 0;
- }
- }
-}
-EXPORT_SYMBOL(mmc_set_data_timeout);
-
-/**
- * __mmc_claim_host - exclusively claim a host
- * @host: mmc host to claim
- * @card: mmc card to claim host for
- *
- * Claim a host for a set of operations. If a valid card
- * is passed and this wasn't the last card selected, select
- * the card before returning.
- *
- * Note: you should use mmc_card_claim_host or mmc_claim_host.
- */
-void mmc_claim_host(struct mmc_host *host)
-{
- DECLARE_WAITQUEUE(wait, current);
- unsigned long flags;
-
- add_wait_queue(&host->wq, &wait);
- spin_lock_irqsave(&host->lock, flags);
- while (1) {
- set_current_state(TASK_UNINTERRUPTIBLE);
- if (!host->claimed)
- break;
- spin_unlock_irqrestore(&host->lock, flags);
- schedule();
- spin_lock_irqsave(&host->lock, flags);
- }
- set_current_state(TASK_RUNNING);
- host->claimed = 1;
- spin_unlock_irqrestore(&host->lock, flags);
- remove_wait_queue(&host->wq, &wait);
-}
-
-EXPORT_SYMBOL(mmc_claim_host);
-
-/**
- * mmc_release_host - release a host
- * @host: mmc host to release
- *
- * Release a MMC host, allowing others to claim the host
- * for their operations.
- */
-void mmc_release_host(struct mmc_host *host)
-{
- unsigned long flags;
-
- BUG_ON(!host->claimed);
-
- spin_lock_irqsave(&host->lock, flags);
- host->claimed = 0;
- spin_unlock_irqrestore(&host->lock, flags);
-
- wake_up(&host->wq);
-}
-
-EXPORT_SYMBOL(mmc_release_host);
-
-static inline void mmc_set_ios(struct mmc_host *host)
-{
- struct mmc_ios *ios = &host->ios;
-
- pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u "
- "width %u timing %u\n",
- mmc_hostname(host), ios->clock, ios->bus_mode,
- ios->power_mode, ios->chip_select, ios->vdd,
- ios->bus_width, ios->timing);
-
- host->ops->set_ios(host, ios);
-}
-
-static int mmc_select_card(struct mmc_card *card)
-{
- int err;
- struct mmc_command cmd;
-
- BUG_ON(!card->host->claimed);
-
- cmd.opcode = MMC_SELECT_CARD;
- cmd.arg = card->rca << 16;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
-
- err = mmc_wait_for_cmd(card->host, &cmd, CMD_RETRIES);
- if (err != MMC_ERR_NONE)
- return err;
-
- /*
- * We can only change the bus width of SD cards when
- * they are selected so we have to put the handling
- * here.
- *
- * The card is in 1 bit mode by default so
- * we only need to change if it supports the
- * wider version.
- */
- if (mmc_card_sd(card) &&
- (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4) &&
- (card->host->caps & MMC_CAP_4_BIT_DATA)) {
-
- struct mmc_command cmd;
- cmd.opcode = SD_APP_SET_BUS_WIDTH;
- cmd.arg = SD_BUS_WIDTH_4;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
-
- err = mmc_wait_for_app_cmd(card->host, card->rca,
- &cmd, CMD_RETRIES);
- if (err != MMC_ERR_NONE)
- return err;
-
- card->host->ios.bus_width = MMC_BUS_WIDTH_4;
- mmc_set_ios(card->host);
- }
-
- return MMC_ERR_NONE;
-}
-
-
-static inline void mmc_delay(unsigned int ms)
-{
- if (ms < 1000 / HZ) {
- cond_resched();
- mdelay(ms);
- } else {
- msleep(ms);
- }
-}
-
-/*
- * Mask off any voltages we don't support and select
- * the lowest voltage
- */
-static u32 mmc_select_voltage(struct mmc_host *host, u32 ocr)
-{
- int bit;
-
- ocr &= host->ocr_avail;
-
- bit = ffs(ocr);
- if (bit) {
- bit -= 1;
-
- ocr &= 3 << bit;
-
- host->ios.vdd = bit;
- mmc_set_ios(host);
- } else {
- ocr = 0;
- }
-
- return ocr;
-}
-
-#define UNSTUFF_BITS(resp,start,size) \
- ({ \
- const int __size = size; \
- const u32 __mask = (__size < 32 ? 1 << __size : 0) - 1; \
- const int __off = 3 - ((start) / 32); \
- const int __shft = (start) & 31; \
- u32 __res; \
- \
- __res = resp[__off] >> __shft; \
- if (__size + __shft > 32) \
- __res |= resp[__off-1] << ((32 - __shft) % 32); \
- __res & __mask; \
- })
-
-/*
- * Given the decoded CSD structure, decode the raw CID to our CID structure.
- */
-static void mmc_decode_cid(struct mmc_card *card)
-{
- u32 *resp = card->raw_cid;
-
- memset(&card->cid, 0, sizeof(struct mmc_cid));
-
- if (mmc_card_sd(card)) {
- /*
- * SD doesn't currently have a version field so we will
- * have to assume we can parse this.
- */
- card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
- card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
- card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
- card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
- card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
- card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
- card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
- card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4);
- card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4);
- card->cid.serial = UNSTUFF_BITS(resp, 24, 32);
- card->cid.year = UNSTUFF_BITS(resp, 12, 8);
- card->cid.month = UNSTUFF_BITS(resp, 8, 4);
-
- card->cid.year += 2000; /* SD cards year offset */
- } else {
- /*
- * The selection of the format here is based upon published
- * specs from sandisk and from what people have reported.
- */
- switch (card->csd.mmca_vsn) {
- case 0: /* MMC v1.0 - v1.2 */
- case 1: /* MMC v1.4 */
- card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
- card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
- card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
- card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
- card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
- card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
- card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
- card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
- card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
- card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
- card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
- card->cid.month = UNSTUFF_BITS(resp, 12, 4);
- card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
- break;
-
- case 2: /* MMC v2.0 - v2.2 */
- case 3: /* MMC v3.1 - v3.3 */
- case 4: /* MMC v4 */
- card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
- card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
- card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
- card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
- card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
- card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
- card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
- card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
- card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
- card->cid.month = UNSTUFF_BITS(resp, 12, 4);
- card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
- break;
-
- default:
- printk("%s: card has unknown MMCA version %d\n",
- mmc_hostname(card->host), card->csd.mmca_vsn);
- mmc_card_set_bad(card);
- break;
- }
- }
-}
-
-/*
- * Given a 128-bit response, decode to our card CSD structure.
- */
-static void mmc_decode_csd(struct mmc_card *card)
-{
- struct mmc_csd *csd = &card->csd;
- unsigned int e, m, csd_struct;
- u32 *resp = card->raw_csd;
-
- if (mmc_card_sd(card)) {
- csd_struct = UNSTUFF_BITS(resp, 126, 2);
-
- switch (csd_struct) {
- case 0:
- m = UNSTUFF_BITS(resp, 115, 4);
- e = UNSTUFF_BITS(resp, 112, 3);
- csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
- csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
-
- m = UNSTUFF_BITS(resp, 99, 4);
- e = UNSTUFF_BITS(resp, 96, 3);
- csd->max_dtr = tran_exp[e] * tran_mant[m];
- csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
-
- e = UNSTUFF_BITS(resp, 47, 3);
- m = UNSTUFF_BITS(resp, 62, 12);
- csd->capacity = (1 + m) << (e + 2);
-
- csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
- csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
- csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
- csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
- csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
- csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
- csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
- break;
- case 1:
- /*
- * This is a block-addressed SDHC card. Most
- * interesting fields are unused and have fixed
- * values. To avoid getting tripped by buggy cards,
- * we assume those fixed values ourselves.
- */
- mmc_card_set_blockaddr(card);
-
- csd->tacc_ns = 0; /* Unused */
- csd->tacc_clks = 0; /* Unused */
-
- m = UNSTUFF_BITS(resp, 99, 4);
- e = UNSTUFF_BITS(resp, 96, 3);
- csd->max_dtr = tran_exp[e] * tran_mant[m];
- csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
-
- m = UNSTUFF_BITS(resp, 48, 22);
- csd->capacity = (1 + m) << 10;
-
- csd->read_blkbits = 9;
- csd->read_partial = 0;
- csd->write_misalign = 0;
- csd->read_misalign = 0;
- csd->r2w_factor = 4; /* Unused */
- csd->write_blkbits = 9;
- csd->write_partial = 0;
- break;
- default:
- printk("%s: unrecognised CSD structure version %d\n",
- mmc_hostname(card->host), csd_struct);
- mmc_card_set_bad(card);
- return;
- }
- } else {
- /*
- * We only understand CSD structure v1.1 and v1.2.
- * v1.2 has extra information in bits 15, 11 and 10.
- */
- csd_struct = UNSTUFF_BITS(resp, 126, 2);
- if (csd_struct != 1 && csd_struct != 2) {
- printk("%s: unrecognised CSD structure version %d\n",
- mmc_hostname(card->host), csd_struct);
- mmc_card_set_bad(card);
- return;
- }
-
- csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
- m = UNSTUFF_BITS(resp, 115, 4);
- e = UNSTUFF_BITS(resp, 112, 3);
- csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
- csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
-
- m = UNSTUFF_BITS(resp, 99, 4);
- e = UNSTUFF_BITS(resp, 96, 3);
- csd->max_dtr = tran_exp[e] * tran_mant[m];
- csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
-
- e = UNSTUFF_BITS(resp, 47, 3);
- m = UNSTUFF_BITS(resp, 62, 12);
- csd->capacity = (1 + m) << (e + 2);
-
- csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
- csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
- csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
- csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
- csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
- csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
- csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
- }
-}
-
-/*
- * Given a 64-bit response, decode to our card SCR structure.
- */
-static void mmc_decode_scr(struct mmc_card *card)
-{
- struct sd_scr *scr = &card->scr;
- unsigned int scr_struct;
- u32 resp[4];
-
- BUG_ON(!mmc_card_sd(card));
-
- resp[3] = card->raw_scr[1];
- resp[2] = card->raw_scr[0];
-
- scr_struct = UNSTUFF_BITS(resp, 60, 4);
- if (scr_struct != 0) {
- printk("%s: unrecognised SCR structure version %d\n",
- mmc_hostname(card->host), scr_struct);
- mmc_card_set_bad(card);
- return;
- }
-
- scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
- scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
-}
-
-/*
- * Allocate a new MMC card
- */
-static struct mmc_card *
-mmc_alloc_card(struct mmc_host *host, u32 *raw_cid)
-{
- struct mmc_card *card;
-
- card = kmalloc(sizeof(struct mmc_card), GFP_KERNEL);
- if (!card)
- return ERR_PTR(-ENOMEM);
-
- mmc_init_card(card, host);
- memcpy(card->raw_cid, raw_cid, sizeof(card->raw_cid));
-
- return card;
-}
-
-/*
- * Tell attached cards to go to IDLE state
- */
-static void mmc_idle_cards(struct mmc_host *host)
-{
- struct mmc_command cmd;
-
- host->ios.chip_select = MMC_CS_HIGH;
- mmc_set_ios(host);
-
- mmc_delay(1);
-
- cmd.opcode = MMC_GO_IDLE_STATE;
- cmd.arg = 0;
- cmd.flags = MMC_RSP_NONE | MMC_CMD_BC;
-
- mmc_wait_for_cmd(host, &cmd, 0);
-
- mmc_delay(1);
-
- host->ios.chip_select = MMC_CS_DONTCARE;
- mmc_set_ios(host);
-
- mmc_delay(1);
-}
-
-/*
- * Apply power to the MMC stack. This is a two-stage process.
- * First, we enable power to the card without the clock running.
- * We then wait a bit for the power to stabilise. Finally,
- * enable the bus drivers and clock to the card.
- *
- * We must _NOT_ enable the clock prior to power stablising.
- *
- * If a host does all the power sequencing itself, ignore the
- * initial MMC_POWER_UP stage.
- */
-static void mmc_power_up(struct mmc_host *host)
-{
- int bit = fls(host->ocr_avail) - 1;
-
- host->ios.vdd = bit;
- host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
- host->ios.chip_select = MMC_CS_DONTCARE;
- host->ios.power_mode = MMC_POWER_UP;
- host->ios.bus_width = MMC_BUS_WIDTH_1;
- host->ios.timing = MMC_TIMING_LEGACY;
- mmc_set_ios(host);
-
- mmc_delay(1);
-
- host->ios.clock = host->f_min;
- host->ios.power_mode = MMC_POWER_ON;
- mmc_set_ios(host);
-
- mmc_delay(2);
-}
-
-static void mmc_power_off(struct mmc_host *host)
-{
- host->ios.clock = 0;
- host->ios.vdd = 0;
- host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
- host->ios.chip_select = MMC_CS_DONTCARE;
- host->ios.power_mode = MMC_POWER_OFF;
- host->ios.bus_width = MMC_BUS_WIDTH_1;
- host->ios.timing = MMC_TIMING_LEGACY;
- mmc_set_ios(host);
-}
-
-static int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
-{
- struct mmc_command cmd;
- int i, err = 0;
-
- cmd.opcode = MMC_SEND_OP_COND;
- cmd.arg = ocr;
- cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
-
- for (i = 100; i; i--) {
- err = mmc_wait_for_cmd(host, &cmd, 0);
- if (err != MMC_ERR_NONE)
- break;
-
- if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
- break;
-
- err = MMC_ERR_TIMEOUT;
-
- mmc_delay(10);
- }
-
- if (rocr)
- *rocr = cmd.resp[0];
-
- return err;
-}
-
-static int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
-{
- struct mmc_command cmd;
- int i, err = 0;
-
- cmd.opcode = SD_APP_OP_COND;
- cmd.arg = ocr;
- cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
-
- for (i = 100; i; i--) {
- err = mmc_wait_for_app_cmd(host, 0, &cmd, CMD_RETRIES);
- if (err != MMC_ERR_NONE)
- break;
-
- if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
- break;
-
- err = MMC_ERR_TIMEOUT;
-
- mmc_delay(10);
- }
-
- if (rocr)
- *rocr = cmd.resp[0];
-
- return err;
-}
-
-static int mmc_send_if_cond(struct mmc_host *host, u32 ocr, int *rsd2)
-{
- struct mmc_command cmd;
- int err, sd2;
- static const u8 test_pattern = 0xAA;
-
- /*
- * To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
- * before SD_APP_OP_COND. This command will harmlessly fail for
- * SD 1.0 cards.
- */
- cmd.opcode = SD_SEND_IF_COND;
- cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
- cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR;
-
- err = mmc_wait_for_cmd(host, &cmd, 0);
- if (err == MMC_ERR_NONE) {
- if ((cmd.resp[0] & 0xFF) == test_pattern) {
- sd2 = 1;
- } else {
- sd2 = 0;
- err = MMC_ERR_FAILED;
- }
- } else {
- /*
- * Treat errors as SD 1.0 card.
- */
- sd2 = 0;
- err = MMC_ERR_NONE;
- }
- if (rsd2)
- *rsd2 = sd2;
- return err;
-}
-
-/*
- * Discover the card by requesting its CID.
- *
- * Create a mmc_card entry for the discovered card, assigning
- * it an RCA, and save the raw CID for decoding later.
- */
-static void mmc_discover_card(struct mmc_host *host)
-{
- unsigned int err;
-
- struct mmc_command cmd;
-
- BUG_ON(host->card);
-
- cmd.opcode = MMC_ALL_SEND_CID;
- cmd.arg = 0;
- cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
-
- err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
- if (err == MMC_ERR_TIMEOUT) {
- err = MMC_ERR_NONE;
- return;
- }
- if (err != MMC_ERR_NONE) {
- printk(KERN_ERR "%s: error requesting CID: %d\n",
- mmc_hostname(host), err);
- return;
- }
-
- host->card = mmc_alloc_card(host, cmd.resp);
- if (IS_ERR(host->card)) {
- err = PTR_ERR(host->card);
- host->card = NULL;
- return;
- }
-
- if (host->mode == MMC_MODE_SD) {
- host->card->type = MMC_TYPE_SD;
-
- cmd.opcode = SD_SEND_RELATIVE_ADDR;
- cmd.arg = 0;
- cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
-
- err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
- if (err != MMC_ERR_NONE)
- mmc_card_set_dead(host->card);
- else {
- host->card->rca = cmd.resp[0] >> 16;
-
- if (!host->ops->get_ro) {
- printk(KERN_WARNING "%s: host does not "
- "support reading read-only "
- "switch. assuming write-enable.\n",
- mmc_hostname(host));
- } else {
- if (host->ops->get_ro(host))
- mmc_card_set_readonly(host->card);
- }
- }
- } else {
- host->card->type = MMC_TYPE_MMC;
- host->card->rca = 1;
-
- cmd.opcode = MMC_SET_RELATIVE_ADDR;
- cmd.arg = host->card->rca << 16;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
-
- err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
- if (err != MMC_ERR_NONE)
- mmc_card_set_dead(host->card);
- }
-}
-
-static void mmc_read_csd(struct mmc_host *host)
-{
- struct mmc_command cmd;
- int err;
-
- if (!host->card)
- return;
- if (mmc_card_dead(host->card))
- return;
-
- cmd.opcode = MMC_SEND_CSD;
- cmd.arg = host->card->rca << 16;
- cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
-
- err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
- if (err != MMC_ERR_NONE) {
- mmc_card_set_dead(host->card);
- return;
- }
-
- memcpy(host->card->raw_csd, cmd.resp, sizeof(host->card->raw_csd));
-
- mmc_decode_csd(host->card);
- mmc_decode_cid(host->card);
-}
-
-static void mmc_process_ext_csd(struct mmc_host *host)
-{
- int err;
-
- struct mmc_request mrq;
- struct mmc_command cmd;
- struct mmc_data data;
-
- u8 *ext_csd;
- struct scatterlist sg;
-
- if (!host->card)
- return;
- if (mmc_card_dead(host->card))
- return;
- if (mmc_card_sd(host->card))
- return;
- if (host->card->csd.mmca_vsn < CSD_SPEC_VER_4)
- return;
-
- /*
- * As the ext_csd is so large and mostly unused, we don't store the
- * raw block in mmc_card.
- */
- ext_csd = kmalloc(512, GFP_KERNEL);
- if (!ext_csd) {
- printk("%s: could not allocate a buffer to receive the ext_csd."
- "mmc v4 cards will be treated as v3.\n",
- mmc_hostname(host));
- return;
- }
-
- memset(&cmd, 0, sizeof(struct mmc_command));
-
- cmd.opcode = MMC_SEND_EXT_CSD;
- cmd.arg = 0;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
-
- memset(&data, 0, sizeof(struct mmc_data));
-
- mmc_set_data_timeout(&data, host->card, 0);
-
- data.blksz = 512;
- data.blocks = 1;
- data.flags = MMC_DATA_READ;
- data.sg = &sg;
- data.sg_len = 1;
-
- memset(&mrq, 0, sizeof(struct mmc_request));
-
- mrq.cmd = &cmd;
- mrq.data = &data;
-
- sg_init_one(&sg, ext_csd, 512);
-
- mmc_wait_for_req(host, &mrq);
-
- if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
- if (host->card->csd.capacity == (4096 * 512)) {
- printk(KERN_ERR "%s: unable to read EXT_CSD "
- "on a possible high capacity card. "
- "Card will be ignored.\n",
- mmc_hostname(host));
- mmc_card_set_dead(host->card);
- } else {
- printk(KERN_WARNING "%s: unable to read "
- "EXT_CSD, performance might "
- "suffer.\n",
- mmc_hostname(host));
- }
- goto out;
- }
-
- host->card->ext_csd.sectors =
- ext_csd[EXT_CSD_SEC_CNT + 0] << 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;
- if (host->card->ext_csd.sectors)
- mmc_card_set_blockaddr(host->card);
-
- switch (ext_csd[EXT_CSD_CARD_TYPE]) {
- case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26:
- host->card->ext_csd.hs_max_dtr = 52000000;
- break;
- case EXT_CSD_CARD_TYPE_26:
- host->card->ext_csd.hs_max_dtr = 26000000;
- break;
- default:
- /* MMC v4 spec says this cannot happen */
- printk("%s: card is mmc v4 but doesn't support "
- "any high-speed modes.\n",
- mmc_hostname(host));
- goto out;
- }
-
- if (host->caps & MMC_CAP_MMC_HIGHSPEED) {
- /* Activate highspeed support. */
- cmd.opcode = MMC_SWITCH;
- cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
- (EXT_CSD_HS_TIMING << 16) |
- (1 << 8) |
- EXT_CSD_CMD_SET_NORMAL;
- cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
-
- err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
- if (err != MMC_ERR_NONE) {
- printk("%s: failed to switch card to mmc v4 "
- "high-speed mode.\n",
- mmc_hostname(host));
- goto out;
- }
-
- mmc_card_set_highspeed(host->card);
-
- host->ios.timing = MMC_TIMING_MMC_HS;
- mmc_set_ios(host);
- }
-
- /* Check for host support for wide-bus modes. */
- if (host->caps & MMC_CAP_4_BIT_DATA) {
- /* Activate 4-bit support. */
- cmd.opcode = MMC_SWITCH;
- cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
- (EXT_CSD_BUS_WIDTH << 16) |
- (EXT_CSD_BUS_WIDTH_4 << 8) |
- EXT_CSD_CMD_SET_NORMAL;
- cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
-
- err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
- if (err != MMC_ERR_NONE) {
- printk("%s: failed to switch card to "
- "mmc v4 4-bit bus mode.\n",
- mmc_hostname(host));
- goto out;
- }
-
- host->ios.bus_width = MMC_BUS_WIDTH_4;
- mmc_set_ios(host);
- }
-
-out:
- kfree(ext_csd);
-}
-
-static void mmc_read_scr(struct mmc_host *host)
-{
- int err;
- struct mmc_request mrq;
- struct mmc_command cmd;
- struct mmc_data data;
- struct scatterlist sg;
-
- if (!host->card)
- return;
- if (mmc_card_dead(host->card))
- return;
- if (!mmc_card_sd(host->card))
- return;
-
- memset(&cmd, 0, sizeof(struct mmc_command));
-
- cmd.opcode = MMC_APP_CMD;
- cmd.arg = host->card->rca << 16;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
-
- err = mmc_wait_for_cmd(host, &cmd, 0);
- if ((err != MMC_ERR_NONE) || !(cmd.resp[0] & R1_APP_CMD)) {
- mmc_card_set_dead(host->card);
- return;
- }
-
- memset(&cmd, 0, sizeof(struct mmc_command));
-
- cmd.opcode = SD_APP_SEND_SCR;
- cmd.arg = 0;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
-
- memset(&data, 0, sizeof(struct mmc_data));
-
- mmc_set_data_timeout(&data, host->card, 0);
-
- data.blksz = 1 << 3;
- data.blocks = 1;
- data.flags = MMC_DATA_READ;
- data.sg = &sg;
- data.sg_len = 1;
-
- memset(&mrq, 0, sizeof(struct mmc_request));
-
- mrq.cmd = &cmd;
- mrq.data = &data;
-
- sg_init_one(&sg, (u8*)host->card->raw_scr, 8);
-
- mmc_wait_for_req(host, &mrq);
-
- if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
- mmc_card_set_dead(host->card);
- return;
- }
-
- host->card->raw_scr[0] = ntohl(host->card->raw_scr[0]);
- host->card->raw_scr[1] = ntohl(host->card->raw_scr[1]);
-
- mmc_decode_scr(host->card);
-}
-
-static void mmc_read_switch_caps(struct mmc_host *host)
-{
- struct mmc_request mrq;
- struct mmc_command cmd;
- struct mmc_data data;
- unsigned char *status;
- struct scatterlist sg;
-
- if (!(host->caps & MMC_CAP_SD_HIGHSPEED))
- return;
-
- if (!host->card)
- return;
- if (mmc_card_dead(host->card))
- return;
- if (!mmc_card_sd(host->card))
- return;
- if (host->card->scr.sda_vsn < SCR_SPEC_VER_1)
- return;
-
- status = kmalloc(64, GFP_KERNEL);
- if (!status) {
- printk(KERN_WARNING "%s: Unable to allocate buffer for "
- "reading switch capabilities.\n",
- mmc_hostname(host));
- return;
- }
-
- memset(&cmd, 0, sizeof(struct mmc_command));
-
- cmd.opcode = SD_SWITCH;
- cmd.arg = 0x00FFFFF1;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
-
- memset(&data, 0, sizeof(struct mmc_data));
-
- mmc_set_data_timeout(&data, host->card, 0);
-
- data.blksz = 64;
- data.blocks = 1;
- data.flags = MMC_DATA_READ;
- data.sg = &sg;
- data.sg_len = 1;
-
- memset(&mrq, 0, sizeof(struct mmc_request));
-
- mrq.cmd = &cmd;
- mrq.data = &data;
-
- sg_init_one(&sg, status, 64);
-
- mmc_wait_for_req(host, &mrq);
-
- if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
- printk("%s: unable to read switch capabilities, "
- "performance might suffer.\n",
- mmc_hostname(host));
- goto out;
- }
-
- if (status[13] & 0x02)
- host->card->sw_caps.hs_max_dtr = 50000000;
-
- memset(&cmd, 0, sizeof(struct mmc_command));
-
- cmd.opcode = SD_SWITCH;
- cmd.arg = 0x80FFFFF1;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
-
- memset(&data, 0, sizeof(struct mmc_data));
-
- mmc_set_data_timeout(&data, host->card, 0);
-
- data.blksz = 64;
- data.blocks = 1;
- data.flags = MMC_DATA_READ;
- data.sg = &sg;
- data.sg_len = 1;
-
- memset(&mrq, 0, sizeof(struct mmc_request));
-
- mrq.cmd = &cmd;
- mrq.data = &data;
-
- sg_init_one(&sg, status, 64);
-
- mmc_wait_for_req(host, &mrq);
-
- if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE ||
- (status[16] & 0xF) != 1) {
- printk(KERN_WARNING "%s: Problem switching card "
- "into high-speed mode!\n",
- mmc_hostname(host));
- goto out;
- }
-
- mmc_card_set_highspeed(host->card);
-
- host->ios.timing = MMC_TIMING_SD_HS;
- mmc_set_ios(host);
-
-out:
- kfree(status);
-}
-
-static unsigned int mmc_calculate_clock(struct mmc_host *host)
-{
- unsigned int max_dtr = host->f_max;
-
- if (host->card && !mmc_card_dead(host->card)) {
- if (mmc_card_highspeed(host->card) && mmc_card_sd(host->card)) {
- if (max_dtr > host->card->sw_caps.hs_max_dtr)
- max_dtr = host->card->sw_caps.hs_max_dtr;
- } else if (mmc_card_highspeed(host->card) && !mmc_card_sd(host->card)) {
- if (max_dtr > host->card->ext_csd.hs_max_dtr)
- max_dtr = host->card->ext_csd.hs_max_dtr;
- } else if (max_dtr > host->card->csd.max_dtr) {
- max_dtr = host->card->csd.max_dtr;
- }
- }
-
- pr_debug("%s: selected %d.%03dMHz transfer rate\n",
- mmc_hostname(host),
- max_dtr / 1000000, (max_dtr / 1000) % 1000);
-
- return max_dtr;
-}
-
-/*
- * Check whether cards we already know about are still present.
- * We do this by requesting status, and checking whether a card
- * responds.
- *
- * A request for status does not cause a state change in data
- * transfer mode.
- */
-static void mmc_check_card(struct mmc_card *card)
-{
- struct mmc_command cmd;
- int err;
-
- BUG_ON(!card);
-
- cmd.opcode = MMC_SEND_STATUS;
- cmd.arg = card->rca << 16;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
-
- err = mmc_wait_for_cmd(card->host, &cmd, CMD_RETRIES);
- if (err == MMC_ERR_NONE)
- return;
-
- mmc_card_set_dead(card);
-}
-
-static void mmc_setup(struct mmc_host *host)
-{
- int err;
- u32 ocr;
-
- host->mode = MMC_MODE_SD;
-
- mmc_power_up(host);
- mmc_idle_cards(host);
-
- err = mmc_send_if_cond(host, host->ocr_avail, NULL);
- if (err != MMC_ERR_NONE) {
- return;
- }
- err = mmc_send_app_op_cond(host, 0, &ocr);
-
- /*
- * If we fail to detect any SD cards then try
- * searching for MMC cards.
- */
- if (err != MMC_ERR_NONE) {
- host->mode = MMC_MODE_MMC;
-
- err = mmc_send_op_cond(host, 0, &ocr);
- if (err != MMC_ERR_NONE)
- return;
- }
-
- host->ocr = mmc_select_voltage(host, ocr);
-
- if (host->ocr == 0)
- return;
-
- /*
- * Since we're changing the OCR value, we seem to
- * need to tell some cards to go back to the idle
- * state. We wait 1ms to give cards time to
- * respond.
- */
- mmc_idle_cards(host);
-
- /*
- * Send the selected OCR multiple times... until the cards
- * all get the idea that they should be ready for CMD2.
- * (My SanDisk card seems to need this.)
- */
- if (host->mode == MMC_MODE_SD) {
- int err, sd2;
- err = mmc_send_if_cond(host, host->ocr, &sd2);
- if (err == MMC_ERR_NONE) {
- /*
- * If SD_SEND_IF_COND indicates an SD 2.0
- * compliant card and we should set bit 30
- * of the ocr to indicate that we can handle
- * block-addressed SDHC cards.
- */
- mmc_send_app_op_cond(host, host->ocr | (sd2 << 30), NULL);
- }
- } else {
- /* The extra bit indicates that we support high capacity */
- mmc_send_op_cond(host, host->ocr | (1 << 30), NULL);
- }
-
- mmc_discover_card(host);
-
- /*
- * Ok, now switch to push-pull mode.
- */
- host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
- mmc_set_ios(host);
-
- mmc_read_csd(host);
-
- if (host->card && !mmc_card_dead(host->card)) {
- err = mmc_select_card(host->card);
- if (err != MMC_ERR_NONE)
- mmc_card_set_dead(host->card);
- }
-
- if (host->mode == MMC_MODE_SD) {
- mmc_read_scr(host);
- mmc_read_switch_caps(host);
- } else
- mmc_process_ext_csd(host);
-}
-
-
-/**
- * mmc_detect_change - process change of state on a MMC socket
- * @host: host which changed state.
- * @delay: optional delay to wait before detection (jiffies)
- *
- * All we know is that card(s) have been inserted or removed
- * from the socket(s). We don't know which socket or cards.
- */
-void mmc_detect_change(struct mmc_host *host, unsigned long delay)
-{
-#ifdef CONFIG_MMC_DEBUG
- mmc_claim_host(host);
- BUG_ON(host->removed);
- mmc_release_host(host);
-#endif
-
- mmc_schedule_delayed_work(&host->detect, delay);
-}
-
-EXPORT_SYMBOL(mmc_detect_change);
-
-
-static void mmc_rescan(struct work_struct *work)
-{
- struct mmc_host *host =
- container_of(work, struct mmc_host, detect.work);
-
- mmc_claim_host(host);
-
- /*
- * Check for removed card and newly inserted ones. We check for
- * removed cards first so we can intelligently re-select the VDD.
- */
- if (host->card) {
- mmc_check_card(host->card);
-
- mmc_release_host(host);
-
- if (mmc_card_dead(host->card)) {
- mmc_remove_card(host->card);
- host->card = NULL;
- }
-
- goto out;
- }
-
- mmc_setup(host);
-
- if (host->card && !mmc_card_dead(host->card)) {
- /*
- * (Re-)calculate the fastest clock rate which the
- * attached cards and the host support.
- */
- host->ios.clock = mmc_calculate_clock(host);
- mmc_set_ios(host);
- }
-
- mmc_release_host(host);
-
- /*
- * If this is a new and good card, register it.
- */
- if (host->card && !mmc_card_dead(host->card)) {
- if (mmc_register_card(host->card))
- mmc_card_set_dead(host->card);
- }
-
- /*
- * If this card is dead, destroy it.
- */
- if (host->card && mmc_card_dead(host->card)) {
- mmc_remove_card(host->card);
- host->card = NULL;
- }
-
-out:
- /*
- * If we discover that there are no cards on the
- * bus, turn off the clock and power down.
- */
- if (!host->card)
- mmc_power_off(host);
-}
-
-
-/**
- * mmc_alloc_host - initialise the per-host structure.
- * @extra: sizeof private data structure
- * @dev: pointer to host device model structure
- *
- * Initialise the per-host structure.
- */
-struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
-{
- struct mmc_host *host;
-
- host = mmc_alloc_host_sysfs(extra, dev);
- if (host) {
- spin_lock_init(&host->lock);
- init_waitqueue_head(&host->wq);
- INIT_DELAYED_WORK(&host->detect, mmc_rescan);
-
- /*
- * By default, hosts do not support SGIO or large requests.
- * They have to set these according to their abilities.
- */
- host->max_hw_segs = 1;
- host->max_phys_segs = 1;
- host->max_seg_size = PAGE_CACHE_SIZE;
-
- host->max_req_size = PAGE_CACHE_SIZE;
- host->max_blk_size = 512;
- host->max_blk_count = PAGE_CACHE_SIZE / 512;
- }
-
- return host;
-}
-
-EXPORT_SYMBOL(mmc_alloc_host);
-
-/**
- * mmc_add_host - initialise host hardware
- * @host: mmc host
- */
-int mmc_add_host(struct mmc_host *host)
-{
- int ret;
-
- ret = mmc_add_host_sysfs(host);
- if (ret == 0) {
- mmc_power_off(host);
- mmc_detect_change(host, 0);
- }
-
- return ret;
-}
-
-EXPORT_SYMBOL(mmc_add_host);
-
-/**
- * mmc_remove_host - remove host hardware
- * @host: mmc host
- *
- * Unregister and remove all cards associated with this host,
- * and power down the MMC bus.
- */
-void mmc_remove_host(struct mmc_host *host)
-{
-#ifdef CONFIG_MMC_DEBUG
- mmc_claim_host(host);
- host->removed = 1;
- mmc_release_host(host);
-#endif
-
- mmc_flush_scheduled_work();
-
- if (host->card) {
- mmc_remove_card(host->card);
- host->card = NULL;
- }
-
- mmc_power_off(host);
- mmc_remove_host_sysfs(host);
-}
-
-EXPORT_SYMBOL(mmc_remove_host);
-
-/**
- * mmc_free_host - free the host structure
- * @host: mmc host
- *
- * Free the host once all references to it have been dropped.
- */
-void mmc_free_host(struct mmc_host *host)
-{
- mmc_free_host_sysfs(host);
-}
-
-EXPORT_SYMBOL(mmc_free_host);
-
-#ifdef CONFIG_PM
-
-/**
- * mmc_suspend_host - suspend a host
- * @host: mmc host
- * @state: suspend mode (PM_SUSPEND_xxx)
- */
-int mmc_suspend_host(struct mmc_host *host, pm_message_t state)
-{
- mmc_flush_scheduled_work();
-
- if (host->card) {
- mmc_remove_card(host->card);
- host->card = NULL;
- }
-
- mmc_power_off(host);
-
- return 0;
-}
-
-EXPORT_SYMBOL(mmc_suspend_host);
-
-/**
- * mmc_resume_host - resume a previously suspended host
- * @host: mmc host
- */
-int mmc_resume_host(struct mmc_host *host)
-{
- mmc_rescan(&host->detect.work);
-
- return 0;
-}
-
-EXPORT_SYMBOL(mmc_resume_host);
-
-#endif
-
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * linux/drivers/mmc/mmc.h
- *
- * Copyright (C) 2003 Russell King, All Rights Reserved.
- *
- * 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.
- */
-#ifndef _MMC_H
-#define _MMC_H
-/* core-internal functions */
-void mmc_init_card(struct mmc_card *card, struct mmc_host *host);
-int mmc_register_card(struct mmc_card *card);
-void mmc_remove_card(struct mmc_card *card);
-
-struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev);
-int mmc_add_host_sysfs(struct mmc_host *host);
-void mmc_remove_host_sysfs(struct mmc_host *host);
-void mmc_free_host_sysfs(struct mmc_host *host);
-
-int mmc_schedule_work(struct work_struct *work);
-int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay);
-void mmc_flush_scheduled_work(void);
-#endif
+++ /dev/null
-/*
- * linux/drivers/mmc/mmc_sysfs.c
- *
- * Copyright (C) 2003 Russell King, All Rights Reserved.
- *
- * 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.
- *
- * MMC sysfs/driver model support.
- */
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/idr.h>
-#include <linux/workqueue.h>
-
-#include <linux/mmc/card.h>
-#include <linux/mmc/host.h>
-
-#include "mmc.h"
-
-#define dev_to_mmc_card(d) container_of(d, struct mmc_card, dev)
-#define to_mmc_driver(d) container_of(d, struct mmc_driver, drv)
-#define cls_dev_to_mmc_host(d) container_of(d, struct mmc_host, class_dev)
-
-#define MMC_ATTR(name, fmt, args...) \
-static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
-{ \
- struct mmc_card *card = dev_to_mmc_card(dev); \
- return sprintf(buf, fmt, args); \
-}
-
-MMC_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
- card->raw_cid[2], card->raw_cid[3]);
-MMC_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
- card->raw_csd[2], card->raw_csd[3]);
-MMC_ATTR(scr, "%08x%08x\n", card->raw_scr[0], card->raw_scr[1]);
-MMC_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
-MMC_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
-MMC_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
-MMC_ATTR(manfid, "0x%06x\n", card->cid.manfid);
-MMC_ATTR(name, "%s\n", card->cid.prod_name);
-MMC_ATTR(oemid, "0x%04x\n", card->cid.oemid);
-MMC_ATTR(serial, "0x%08x\n", card->cid.serial);
-
-#define MMC_ATTR_RO(name) __ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
-
-static struct device_attribute mmc_dev_attrs[] = {
- MMC_ATTR_RO(cid),
- MMC_ATTR_RO(csd),
- MMC_ATTR_RO(date),
- MMC_ATTR_RO(fwrev),
- MMC_ATTR_RO(hwrev),
- MMC_ATTR_RO(manfid),
- MMC_ATTR_RO(name),
- MMC_ATTR_RO(oemid),
- MMC_ATTR_RO(serial),
- __ATTR_NULL
-};
-
-static struct device_attribute mmc_dev_attr_scr = MMC_ATTR_RO(scr);
-
-
-static void mmc_release_card(struct device *dev)
-{
- struct mmc_card *card = dev_to_mmc_card(dev);
-
- kfree(card);
-}
-
-/*
- * This currently matches any MMC driver to any MMC card - drivers
- * themselves make the decision whether to drive this card in their
- * probe method. However, we force "bad" cards to fail.
- */
-static int mmc_bus_match(struct device *dev, struct device_driver *drv)
-{
- struct mmc_card *card = dev_to_mmc_card(dev);
- return !mmc_card_bad(card);
-}
-
-static int
-mmc_bus_uevent(struct device *dev, char **envp, int num_envp, char *buf,
- int buf_size)
-{
- struct mmc_card *card = dev_to_mmc_card(dev);
- char ccc[13];
- int retval = 0, i = 0, length = 0;
-
-#define add_env(fmt,val) do { \
- retval = add_uevent_var(envp, num_envp, &i, \
- buf, buf_size, &length, \
- fmt, val); \
- if (retval) \
- return retval; \
-} while (0);
-
- for (i = 0; i < 12; i++)
- ccc[i] = card->csd.cmdclass & (1 << i) ? '1' : '0';
- ccc[12] = '\0';
-
- add_env("MMC_CCC=%s", ccc);
- add_env("MMC_MANFID=%06x", card->cid.manfid);
- add_env("MMC_NAME=%s", mmc_card_name(card));
- add_env("MMC_OEMID=%04x", card->cid.oemid);
-#undef add_env
- envp[i] = NULL;
-
- return 0;
-}
-
-static int mmc_bus_suspend(struct device *dev, pm_message_t state)
-{
- struct mmc_driver *drv = to_mmc_driver(dev->driver);
- struct mmc_card *card = dev_to_mmc_card(dev);
- int ret = 0;
-
- if (dev->driver && drv->suspend)
- ret = drv->suspend(card, state);
- return ret;
-}
-
-static int mmc_bus_resume(struct device *dev)
-{
- struct mmc_driver *drv = to_mmc_driver(dev->driver);
- struct mmc_card *card = dev_to_mmc_card(dev);
- int ret = 0;
-
- if (dev->driver && drv->resume)
- ret = drv->resume(card);
- return ret;
-}
-
-static int mmc_bus_probe(struct device *dev)
-{
- struct mmc_driver *drv = to_mmc_driver(dev->driver);
- struct mmc_card *card = dev_to_mmc_card(dev);
-
- return drv->probe(card);
-}
-
-static int mmc_bus_remove(struct device *dev)
-{
- struct mmc_driver *drv = to_mmc_driver(dev->driver);
- struct mmc_card *card = dev_to_mmc_card(dev);
-
- drv->remove(card);
-
- return 0;
-}
-
-static struct bus_type mmc_bus_type = {
- .name = "mmc",
- .dev_attrs = mmc_dev_attrs,
- .match = mmc_bus_match,
- .uevent = mmc_bus_uevent,
- .probe = mmc_bus_probe,
- .remove = mmc_bus_remove,
- .suspend = mmc_bus_suspend,
- .resume = mmc_bus_resume,
-};
-
-/**
- * mmc_register_driver - register a media driver
- * @drv: MMC media driver
- */
-int mmc_register_driver(struct mmc_driver *drv)
-{
- drv->drv.bus = &mmc_bus_type;
- return driver_register(&drv->drv);
-}
-
-EXPORT_SYMBOL(mmc_register_driver);
-
-/**
- * mmc_unregister_driver - unregister a media driver
- * @drv: MMC media driver
- */
-void mmc_unregister_driver(struct mmc_driver *drv)
-{
- drv->drv.bus = &mmc_bus_type;
- driver_unregister(&drv->drv);
-}
-
-EXPORT_SYMBOL(mmc_unregister_driver);
-
-
-/*
- * Internal function. Initialise a MMC card structure.
- */
-void mmc_init_card(struct mmc_card *card, struct mmc_host *host)
-{
- memset(card, 0, sizeof(struct mmc_card));
- card->host = host;
- device_initialize(&card->dev);
- card->dev.parent = mmc_classdev(host);
- card->dev.bus = &mmc_bus_type;
- card->dev.release = mmc_release_card;
-}
-
-/*
- * Internal function. Register a new MMC card with the driver model.
- */
-int mmc_register_card(struct mmc_card *card)
-{
- int ret;
-
- snprintf(card->dev.bus_id, sizeof(card->dev.bus_id),
- "%s:%04x", mmc_hostname(card->host), card->rca);
-
- ret = device_add(&card->dev);
- if (ret == 0) {
- if (mmc_card_sd(card)) {
- ret = device_create_file(&card->dev, &mmc_dev_attr_scr);
- if (ret)
- device_del(&card->dev);
- }
- }
- if (ret == 0)
- mmc_card_set_present(card);
- return ret;
-}
-
-/*
- * Internal function. Unregister a new MMC card with the
- * driver model, and (eventually) free it.
- */
-void mmc_remove_card(struct mmc_card *card)
-{
- if (mmc_card_present(card)) {
- if (mmc_card_sd(card))
- device_remove_file(&card->dev, &mmc_dev_attr_scr);
-
- device_del(&card->dev);
- }
-
- put_device(&card->dev);
-}
-
-
-static void mmc_host_classdev_release(struct device *dev)
-{
- struct mmc_host *host = cls_dev_to_mmc_host(dev);
- kfree(host);
-}
-
-static struct class mmc_host_class = {
- .name = "mmc_host",
- .dev_release = mmc_host_classdev_release,
-};
-
-static DEFINE_IDR(mmc_host_idr);
-static DEFINE_SPINLOCK(mmc_host_lock);
-
-/*
- * Internal function. Allocate a new MMC host.
- */
-struct mmc_host *mmc_alloc_host_sysfs(int extra, struct device *dev)
-{
- struct mmc_host *host;
-
- host = kmalloc(sizeof(struct mmc_host) + extra, GFP_KERNEL);
- if (host) {
- memset(host, 0, sizeof(struct mmc_host) + extra);
-
- host->parent = dev;
- host->class_dev.parent = dev;
- host->class_dev.class = &mmc_host_class;
- device_initialize(&host->class_dev);
- }
-
- return host;
-}
-
-/*
- * Internal function. Register a new MMC host with the MMC class.
- */
-int mmc_add_host_sysfs(struct mmc_host *host)
-{
- int err;
-
- if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
- return -ENOMEM;
-
- spin_lock(&mmc_host_lock);
- err = idr_get_new(&mmc_host_idr, host, &host->index);
- spin_unlock(&mmc_host_lock);
- if (err)
- return err;
-
- snprintf(host->class_dev.bus_id, BUS_ID_SIZE,
- "mmc%d", host->index);
-
- return device_add(&host->class_dev);
-}
-
-/*
- * Internal function. Unregister a MMC host with the MMC class.
- */
-void mmc_remove_host_sysfs(struct mmc_host *host)
-{
- device_del(&host->class_dev);
-
- spin_lock(&mmc_host_lock);
- idr_remove(&mmc_host_idr, host->index);
- spin_unlock(&mmc_host_lock);
-}
-
-/*
- * Internal function. Free a MMC host.
- */
-void mmc_free_host_sysfs(struct mmc_host *host)
-{
- put_device(&host->class_dev);
-}
-
-static struct workqueue_struct *workqueue;
-
-/*
- * Internal function. Schedule delayed work in the MMC work queue.
- */
-int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay)
-{
- return queue_delayed_work(workqueue, work, delay);
-}
-
-/*
- * Internal function. Flush all scheduled work from the MMC work queue.
- */
-void mmc_flush_scheduled_work(void)
-{
- flush_workqueue(workqueue);
-}
-
-static int __init mmc_init(void)
-{
- int ret;
-
- workqueue = create_singlethread_workqueue("kmmcd");
- if (!workqueue)
- return -ENOMEM;
-
- ret = bus_register(&mmc_bus_type);
- if (ret == 0) {
- ret = class_register(&mmc_host_class);
- if (ret)
- bus_unregister(&mmc_bus_type);
- }
- return ret;
-}
-
-static void __exit mmc_exit(void)
-{
- class_unregister(&mmc_host_class);
- bus_unregister(&mmc_bus_type);
- destroy_workqueue(workqueue);
-}
-
-module_init(mmc_init);
-module_exit(mmc_exit);
#ifndef LINUX_MMC_CARD_H
#define LINUX_MMC_CARD_H
-#include <linux/mmc/mmc.h>
+#include <linux/mmc/core.h>
struct mmc_cid {
unsigned int manfid;
--- /dev/null
+/*
+ * linux/include/linux/mmc/core.h
+ *
+ * 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.
+ */
+#ifndef LINUX_MMC_CORE_H
+#define LINUX_MMC_CORE_H
+
+#include <linux/interrupt.h>
+#include <linux/device.h>
+
+struct request;
+struct mmc_data;
+struct mmc_request;
+
+struct mmc_command {
+ u32 opcode;
+ u32 arg;
+ u32 resp[4];
+ unsigned int flags; /* expected response type */
+#define MMC_RSP_PRESENT (1 << 0)
+#define MMC_RSP_136 (1 << 1) /* 136 bit response */
+#define MMC_RSP_CRC (1 << 2) /* expect valid crc */
+#define MMC_RSP_BUSY (1 << 3) /* card may send busy */
+#define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */
+#define MMC_CMD_MASK (3 << 5) /* command type */
+#define MMC_CMD_AC (0 << 5)
+#define MMC_CMD_ADTC (1 << 5)
+#define MMC_CMD_BC (2 << 5)
+#define MMC_CMD_BCR (3 << 5)
+
+/*
+ * These are the response types, and correspond to valid bit
+ * patterns of the above flags. One additional valid pattern
+ * is all zeros, which means we don't expect a response.
+ */
+#define MMC_RSP_NONE (0)
+#define MMC_RSP_R1 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
+#define MMC_RSP_R1B (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
+#define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC)
+#define MMC_RSP_R3 (MMC_RSP_PRESENT)
+#define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
+#define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
+
+#define mmc_resp_type(cmd) ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE))
+
+/*
+ * These are the command types.
+ */
+#define mmc_cmd_type(cmd) ((cmd)->flags & MMC_CMD_MASK)
+
+ unsigned int retries; /* max number of retries */
+ unsigned int error; /* command error */
+
+#define MMC_ERR_NONE 0
+#define MMC_ERR_TIMEOUT 1
+#define MMC_ERR_BADCRC 2
+#define MMC_ERR_FIFO 3
+#define MMC_ERR_FAILED 4
+#define MMC_ERR_INVALID 5
+
+ struct mmc_data *data; /* data segment associated with cmd */
+ struct mmc_request *mrq; /* associated request */
+};
+
+struct mmc_data {
+ unsigned int timeout_ns; /* data timeout (in ns, max 80ms) */
+ unsigned int timeout_clks; /* data timeout (in clocks) */
+ unsigned int blksz; /* data block size */
+ unsigned int blocks; /* number of blocks */
+ unsigned int error; /* data error */
+ unsigned int flags;
+
+#define MMC_DATA_WRITE (1 << 8)
+#define MMC_DATA_READ (1 << 9)
+#define MMC_DATA_STREAM (1 << 10)
+#define MMC_DATA_MULTI (1 << 11)
+
+ unsigned int bytes_xfered;
+
+ struct mmc_command *stop; /* stop command */
+ struct mmc_request *mrq; /* associated request */
+
+ unsigned int sg_len; /* size of scatter list */
+ struct scatterlist *sg; /* I/O scatter list */
+};
+
+struct mmc_request {
+ struct mmc_command *cmd;
+ struct mmc_data *data;
+ struct mmc_command *stop;
+
+ void *done_data; /* completion data */
+ void (*done)(struct mmc_request *);/* completion function */
+};
+
+struct mmc_host;
+struct mmc_card;
+
+extern int mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
+extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
+extern int mmc_wait_for_app_cmd(struct mmc_host *, unsigned int,
+ struct mmc_command *, int);
+
+extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *, int);
+
+extern void mmc_claim_host(struct mmc_host *host);
+extern void mmc_release_host(struct mmc_host *host);
+
+#endif
#ifndef LINUX_MMC_HOST_H
#define LINUX_MMC_HOST_H
-#include <linux/mmc/mmc.h>
+#include <linux/mmc/core.h>
struct mmc_ios {
unsigned int clock; /* clock rate */
+++ /dev/null
-/*
- * linux/include/linux/mmc/mmc.h
- *
- * 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.
- */
-#ifndef MMC_H
-#define MMC_H
-
-#include <linux/interrupt.h>
-#include <linux/device.h>
-
-struct request;
-struct mmc_data;
-struct mmc_request;
-
-struct mmc_command {
- u32 opcode;
- u32 arg;
- u32 resp[4];
- unsigned int flags; /* expected response type */
-#define MMC_RSP_PRESENT (1 << 0)
-#define MMC_RSP_136 (1 << 1) /* 136 bit response */
-#define MMC_RSP_CRC (1 << 2) /* expect valid crc */
-#define MMC_RSP_BUSY (1 << 3) /* card may send busy */
-#define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */
-#define MMC_CMD_MASK (3 << 5) /* command type */
-#define MMC_CMD_AC (0 << 5)
-#define MMC_CMD_ADTC (1 << 5)
-#define MMC_CMD_BC (2 << 5)
-#define MMC_CMD_BCR (3 << 5)
-
-/*
- * These are the response types, and correspond to valid bit
- * patterns of the above flags. One additional valid pattern
- * is all zeros, which means we don't expect a response.
- */
-#define MMC_RSP_NONE (0)
-#define MMC_RSP_R1 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
-#define MMC_RSP_R1B (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
-#define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC)
-#define MMC_RSP_R3 (MMC_RSP_PRESENT)
-#define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
-#define MMC_RSP_R7 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
-
-#define mmc_resp_type(cmd) ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE))
-
-/*
- * These are the command types.
- */
-#define mmc_cmd_type(cmd) ((cmd)->flags & MMC_CMD_MASK)
-
- unsigned int retries; /* max number of retries */
- unsigned int error; /* command error */
-
-#define MMC_ERR_NONE 0
-#define MMC_ERR_TIMEOUT 1
-#define MMC_ERR_BADCRC 2
-#define MMC_ERR_FIFO 3
-#define MMC_ERR_FAILED 4
-#define MMC_ERR_INVALID 5
-
- struct mmc_data *data; /* data segment associated with cmd */
- struct mmc_request *mrq; /* associated request */
-};
-
-struct mmc_data {
- unsigned int timeout_ns; /* data timeout (in ns, max 80ms) */
- unsigned int timeout_clks; /* data timeout (in clocks) */
- unsigned int blksz; /* data block size */
- unsigned int blocks; /* number of blocks */
- unsigned int error; /* data error */
- unsigned int flags;
-
-#define MMC_DATA_WRITE (1 << 8)
-#define MMC_DATA_READ (1 << 9)
-#define MMC_DATA_STREAM (1 << 10)
-#define MMC_DATA_MULTI (1 << 11)
-
- unsigned int bytes_xfered;
-
- struct mmc_command *stop; /* stop command */
- struct mmc_request *mrq; /* associated request */
-
- unsigned int sg_len; /* size of scatter list */
- struct scatterlist *sg; /* I/O scatter list */
-};
-
-struct mmc_request {
- struct mmc_command *cmd;
- struct mmc_data *data;
- struct mmc_command *stop;
-
- void *done_data; /* completion data */
- void (*done)(struct mmc_request *);/* completion function */
-};
-
-struct mmc_host;
-struct mmc_card;
-
-extern int mmc_wait_for_req(struct mmc_host *, struct mmc_request *);
-extern int mmc_wait_for_cmd(struct mmc_host *, struct mmc_command *, int);
-extern int mmc_wait_for_app_cmd(struct mmc_host *, unsigned int,
- struct mmc_command *, int);
-
-extern void mmc_set_data_timeout(struct mmc_data *, const struct mmc_card *, int);
-
-extern void mmc_claim_host(struct mmc_host *host);
-extern void mmc_release_host(struct mmc_host *host);
-
-#endif
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff