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>
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c
new file mode 100644
index 0000000..7dd720f
--- /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;
+}
+