mmc: Separate out protocol ops

Move protocol operations and definitions into their own files
in an effort to separate protocol handling and bus
arbitration more clearly.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 276 insertions, 0 deletions

diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
new file mode 100644
index 00000000000..7dd720fa589
--- /dev/null
+++ b/drivers/mmc/core/mmc_ops.c
@@ -0,0 +1,276 @@
+/*
+ *  linux/drivers/mmc/mmc_ops.h
+ *
+ *  Copyright 2006-2007 Pierre Ossman
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ */
+
+#include <linux/types.h>
+#include <asm/scatterlist.h>
+#include <linux/scatterlist.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/mmc.h>
+
+#include "core.h"
+#include "mmc_ops.h"
+
+static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
+{
+	int err;
+	struct mmc_command cmd;
+
+	BUG_ON(!host);
+
+	memset(&cmd, 0, sizeof(struct mmc_command));
+
+	cmd.opcode = MMC_SELECT_CARD;
+
+	if (card) {
+		cmd.arg = card->rca << 16;
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+	} else {
+		cmd.arg = 0;
+		cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
+	}
+
+	err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
+	if (err != MMC_ERR_NONE)
+		return err;
+
+	return MMC_ERR_NONE;
+}
+
+int mmc_select_card(struct mmc_card *card)
+{
+	BUG_ON(!card);
+
+	return _mmc_select_card(card->host, card);
+}
+
+int mmc_deselect_cards(struct mmc_host *host)
+{
+	return _mmc_select_card(host, NULL);
+}
+
+int mmc_go_idle(struct mmc_host *host)
+{
+	int err;
+	struct mmc_command cmd;
+
+	mmc_set_chip_select(host, MMC_CS_HIGH);
+
+	mmc_delay(1);
+
+	memset(&cmd, 0, sizeof(struct mmc_command));
+
+	cmd.opcode = MMC_GO_IDLE_STATE;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_NONE | MMC_CMD_BC;
+
+	err = mmc_wait_for_cmd(host, &cmd, 0);
+
+	mmc_delay(1);
+
+	mmc_set_chip_select(host, MMC_CS_DONTCARE);
+
+	mmc_delay(1);
+
+	return err;
+}
+
+int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
+{
+	struct mmc_command cmd;
+	int i, err = 0;
+
+	BUG_ON(!host);
+
+	memset(&cmd, 0, sizeof(struct mmc_command));
+
+	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;
+}
+
+int mmc_all_send_cid(struct mmc_host *host, u32 *cid)
+{
+	int err;
+	struct mmc_command cmd;
+
+	BUG_ON(!host);
+	BUG_ON(!cid);
+
+	memset(&cmd, 0, sizeof(struct mmc_command));
+
+	cmd.opcode = MMC_ALL_SEND_CID;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
+
+	err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
+	if (err != MMC_ERR_NONE)
+		return err;
+
+	memcpy(cid, cmd.resp, sizeof(u32) * 4);
+
+	return MMC_ERR_NONE;
+}
+
+int mmc_set_relative_addr(struct mmc_card *card)
+{
+	int err;
+	struct mmc_command cmd;
+
+	BUG_ON(!card);
+	BUG_ON(!card->host);
+
+	memset(&cmd, 0, sizeof(struct mmc_command));
+
+	cmd.opcode = MMC_SET_RELATIVE_ADDR;
+	cmd.arg = card->rca << 16;
+	cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+
+	err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
+	if (err != MMC_ERR_NONE)
+		return err;
+
+	return MMC_ERR_NONE;
+}
+
+int mmc_send_csd(struct mmc_card *card, u32 *csd)
+{
+	int err;
+	struct mmc_command cmd;
+
+	BUG_ON(!card);
+	BUG_ON(!card->host);
+	BUG_ON(!csd);
+
+	memset(&cmd, 0, sizeof(struct mmc_command));
+
+	cmd.opcode = MMC_SEND_CSD;
+	cmd.arg = card->rca << 16;
+	cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
+
+	err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
+	if (err != MMC_ERR_NONE)
+		return err;
+
+	memcpy(csd, cmd.resp, sizeof(u32) * 4);
+
+	return MMC_ERR_NONE;
+}
+
+int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd)
+{
+	struct mmc_request mrq;
+	struct mmc_command cmd;
+	struct mmc_data data;
+	struct scatterlist sg;
+
+	BUG_ON(!card);
+	BUG_ON(!card->host);
+	BUG_ON(!ext_csd);
+
+	memset(&mrq, 0, sizeof(struct mmc_request));
+	memset(&cmd, 0, sizeof(struct mmc_command));
+	memset(&data, 0, sizeof(struct mmc_data));
+
+	mrq.cmd = &cmd;
+	mrq.data = &data;
+
+	cmd.opcode = MMC_SEND_EXT_CSD;
+	cmd.arg = 0;
+	cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+
+	data.blksz = 512;
+	data.blocks = 1;
+	data.flags = MMC_DATA_READ;
+	data.sg = &sg;
+	data.sg_len = 1;
+
+	sg_init_one(&sg, ext_csd, 512);
+
+	mmc_set_data_timeout(&data, card, 0);
+
+	mmc_wait_for_req(card->host, &mrq);
+
+	if (cmd.error != MMC_ERR_NONE)
+		return cmd.error;
+	if (data.error != MMC_ERR_NONE)
+		return data.error;
+
+	return MMC_ERR_NONE;
+}
+
+int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value)
+{
+	int err;
+	struct mmc_command cmd;
+
+	BUG_ON(!card);
+	BUG_ON(!card->host);
+
+	memset(&cmd, 0, sizeof(struct mmc_command));
+
+	cmd.opcode = MMC_SWITCH;
+	cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+		  (index << 16) |
+		  (value << 8) |
+		  set;
+	cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
+
+	err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
+	if (err != MMC_ERR_NONE)
+		return err;
+
+	return MMC_ERR_NONE;
+}
+
+int mmc_send_status(struct mmc_card *card, u32 *status)
+{
+	int err;
+	struct mmc_command cmd;
+
+	BUG_ON(!card);
+	BUG_ON(!card->host);
+
+	memset(&cmd, 0, sizeof(struct mmc_command));
+
+	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, MMC_CMD_RETRIES);
+	if (err != MMC_ERR_NONE)
+		return err;
+
+	if (status)
+		*status = cmd.resp[0];
+
+	return MMC_ERR_NONE;
+}
+