2007-05-21 12:23:20 -06:00
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/*
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* linux/drivers/mmc/sdio_ops.c
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*
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* Copyright 2006-2007 Pierre Ossman
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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2007-07-06 05:35:01 -06:00
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#include <linux/scatterlist.h>
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2007-05-21 12:23:20 -06:00
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#include <linux/mmc/host.h>
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2007-05-22 12:25:21 -06:00
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#include <linux/mmc/card.h>
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2007-05-21 12:23:20 -06:00
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#include <linux/mmc/mmc.h>
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#include <linux/mmc/sdio.h>
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#include "core.h"
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2008-04-13 12:15:52 -06:00
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#include "sdio_ops.h"
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2007-05-21 12:23:20 -06:00
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int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
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{
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2011-04-13 21:40:30 -06:00
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struct mmc_command cmd = {0};
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2007-05-21 12:23:20 -06:00
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int i, err = 0;
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BUG_ON(!host);
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cmd.opcode = SD_IO_SEND_OP_COND;
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cmd.arg = ocr;
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MMC core learns about SPI
Teach the MMC/SD/SDIO core about using SPI mode.
- Use mmc_host_is_spi() so enumeration works through SPI signaling
and protocols, not just the native versions.
- Provide the SPI response type flags with each request issued,
including requests from the new lock/unlock code.
- Understand that cmd->resp[0] and mmc_get_status() results for SPI
return different values than for "native" MMC/SD protocol; this
affects resetting, checking card lock status, and some others.
- Understand that some commands act a bit differently ... notably:
* OP_COND command doesn't return the OCR
* APP_CMD status doesn't have an R1_APP_CMD analogue
Those changes required some new and updated primitives:
- Provide utilities to access two SPI-only requests, and one
request that wasn't previously needed:
* mmc_spi_read_ocr() ... SPI only
* mmc_spi_set_crc() ... SPI only (override by module parm)
* mmc_send_cid() ... for use without broadcast mode
- Updated internal routines:
* Previous mmc_send_csd() modified into mmc_send_cxd_native();
it uses native "R2" responses, which include 16 bytes of data.
* Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data()
helper for command-and-data access
* Bugfix to that mmc_send_cxd_data() code: dma-to-stack is
unsafe/nonportable, so kmalloc a bounce buffer instead.
- Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper
- Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use
those helper routines based on whether they're native or SPI
The newest categories of cards supported by the MMC stack aren't expected
to work yet with SPI: MMC or SD cards with over 4GB data, and SDIO.
All those cards support SPI mode, so eventually they should work too.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-08 10:11:32 -06:00
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cmd.flags = MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR;
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2007-05-21 12:23:20 -06:00
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for (i = 100; i; i--) {
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err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
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if (err)
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break;
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MMC core learns about SPI
Teach the MMC/SD/SDIO core about using SPI mode.
- Use mmc_host_is_spi() so enumeration works through SPI signaling
and protocols, not just the native versions.
- Provide the SPI response type flags with each request issued,
including requests from the new lock/unlock code.
- Understand that cmd->resp[0] and mmc_get_status() results for SPI
return different values than for "native" MMC/SD protocol; this
affects resetting, checking card lock status, and some others.
- Understand that some commands act a bit differently ... notably:
* OP_COND command doesn't return the OCR
* APP_CMD status doesn't have an R1_APP_CMD analogue
Those changes required some new and updated primitives:
- Provide utilities to access two SPI-only requests, and one
request that wasn't previously needed:
* mmc_spi_read_ocr() ... SPI only
* mmc_spi_set_crc() ... SPI only (override by module parm)
* mmc_send_cid() ... for use without broadcast mode
- Updated internal routines:
* Previous mmc_send_csd() modified into mmc_send_cxd_native();
it uses native "R2" responses, which include 16 bytes of data.
* Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data()
helper for command-and-data access
* Bugfix to that mmc_send_cxd_data() code: dma-to-stack is
unsafe/nonportable, so kmalloc a bounce buffer instead.
- Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper
- Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use
those helper routines based on whether they're native or SPI
The newest categories of cards supported by the MMC stack aren't expected
to work yet with SPI: MMC or SD cards with over 4GB data, and SDIO.
All those cards support SPI mode, so eventually they should work too.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-08 10:11:32 -06:00
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/* if we're just probing, do a single pass */
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if (ocr == 0)
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2007-05-21 12:23:20 -06:00
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break;
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MMC core learns about SPI
Teach the MMC/SD/SDIO core about using SPI mode.
- Use mmc_host_is_spi() so enumeration works through SPI signaling
and protocols, not just the native versions.
- Provide the SPI response type flags with each request issued,
including requests from the new lock/unlock code.
- Understand that cmd->resp[0] and mmc_get_status() results for SPI
return different values than for "native" MMC/SD protocol; this
affects resetting, checking card lock status, and some others.
- Understand that some commands act a bit differently ... notably:
* OP_COND command doesn't return the OCR
* APP_CMD status doesn't have an R1_APP_CMD analogue
Those changes required some new and updated primitives:
- Provide utilities to access two SPI-only requests, and one
request that wasn't previously needed:
* mmc_spi_read_ocr() ... SPI only
* mmc_spi_set_crc() ... SPI only (override by module parm)
* mmc_send_cid() ... for use without broadcast mode
- Updated internal routines:
* Previous mmc_send_csd() modified into mmc_send_cxd_native();
it uses native "R2" responses, which include 16 bytes of data.
* Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data()
helper for command-and-data access
* Bugfix to that mmc_send_cxd_data() code: dma-to-stack is
unsafe/nonportable, so kmalloc a bounce buffer instead.
- Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper
- Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use
those helper routines based on whether they're native or SPI
The newest categories of cards supported by the MMC stack aren't expected
to work yet with SPI: MMC or SD cards with over 4GB data, and SDIO.
All those cards support SPI mode, so eventually they should work too.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-08 10:11:32 -06:00
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/* otherwise wait until reset completes */
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if (mmc_host_is_spi(host)) {
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/*
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* Both R1_SPI_IDLE and MMC_CARD_BUSY indicate
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* an initialized card under SPI, but some cards
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* (Marvell's) only behave when looking at this
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* one.
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*/
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if (cmd.resp[1] & MMC_CARD_BUSY)
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break;
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} else {
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if (cmd.resp[0] & MMC_CARD_BUSY)
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break;
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}
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2007-05-21 12:23:20 -06:00
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err = -ETIMEDOUT;
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mmc_delay(10);
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}
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if (rocr)
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MMC core learns about SPI
Teach the MMC/SD/SDIO core about using SPI mode.
- Use mmc_host_is_spi() so enumeration works through SPI signaling
and protocols, not just the native versions.
- Provide the SPI response type flags with each request issued,
including requests from the new lock/unlock code.
- Understand that cmd->resp[0] and mmc_get_status() results for SPI
return different values than for "native" MMC/SD protocol; this
affects resetting, checking card lock status, and some others.
- Understand that some commands act a bit differently ... notably:
* OP_COND command doesn't return the OCR
* APP_CMD status doesn't have an R1_APP_CMD analogue
Those changes required some new and updated primitives:
- Provide utilities to access two SPI-only requests, and one
request that wasn't previously needed:
* mmc_spi_read_ocr() ... SPI only
* mmc_spi_set_crc() ... SPI only (override by module parm)
* mmc_send_cid() ... for use without broadcast mode
- Updated internal routines:
* Previous mmc_send_csd() modified into mmc_send_cxd_native();
it uses native "R2" responses, which include 16 bytes of data.
* Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data()
helper for command-and-data access
* Bugfix to that mmc_send_cxd_data() code: dma-to-stack is
unsafe/nonportable, so kmalloc a bounce buffer instead.
- Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper
- Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use
those helper routines based on whether they're native or SPI
The newest categories of cards supported by the MMC stack aren't expected
to work yet with SPI: MMC or SD cards with over 4GB data, and SDIO.
All those cards support SPI mode, so eventually they should work too.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-08 10:11:32 -06:00
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*rocr = cmd.resp[mmc_host_is_spi(host) ? 1 : 0];
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2007-05-21 12:23:20 -06:00
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return err;
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}
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2010-03-10 16:20:37 -07:00
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static int mmc_io_rw_direct_host(struct mmc_host *host, int write, unsigned fn,
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unsigned addr, u8 in, u8 *out)
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2007-05-22 12:25:21 -06:00
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{
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2011-04-13 21:40:30 -06:00
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struct mmc_command cmd = {0};
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2007-05-22 12:25:21 -06:00
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int err;
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2010-03-10 16:20:37 -07:00
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BUG_ON(!host);
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2007-05-22 12:25:21 -06:00
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BUG_ON(fn > 7);
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2009-03-05 11:40:27 -07:00
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/* sanity check */
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if (addr & ~0x1FFFF)
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return -EINVAL;
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2007-05-22 12:25:21 -06:00
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cmd.opcode = SD_IO_RW_DIRECT;
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cmd.arg = write ? 0x80000000 : 0x00000000;
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cmd.arg |= fn << 28;
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cmd.arg |= (write && out) ? 0x08000000 : 0x00000000;
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cmd.arg |= addr << 9;
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cmd.arg |= in;
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MMC core learns about SPI
Teach the MMC/SD/SDIO core about using SPI mode.
- Use mmc_host_is_spi() so enumeration works through SPI signaling
and protocols, not just the native versions.
- Provide the SPI response type flags with each request issued,
including requests from the new lock/unlock code.
- Understand that cmd->resp[0] and mmc_get_status() results for SPI
return different values than for "native" MMC/SD protocol; this
affects resetting, checking card lock status, and some others.
- Understand that some commands act a bit differently ... notably:
* OP_COND command doesn't return the OCR
* APP_CMD status doesn't have an R1_APP_CMD analogue
Those changes required some new and updated primitives:
- Provide utilities to access two SPI-only requests, and one
request that wasn't previously needed:
* mmc_spi_read_ocr() ... SPI only
* mmc_spi_set_crc() ... SPI only (override by module parm)
* mmc_send_cid() ... for use without broadcast mode
- Updated internal routines:
* Previous mmc_send_csd() modified into mmc_send_cxd_native();
it uses native "R2" responses, which include 16 bytes of data.
* Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data()
helper for command-and-data access
* Bugfix to that mmc_send_cxd_data() code: dma-to-stack is
unsafe/nonportable, so kmalloc a bounce buffer instead.
- Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper
- Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use
those helper routines based on whether they're native or SPI
The newest categories of cards supported by the MMC stack aren't expected
to work yet with SPI: MMC or SD cards with over 4GB data, and SDIO.
All those cards support SPI mode, so eventually they should work too.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-08 10:11:32 -06:00
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cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC;
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2007-05-22 12:25:21 -06:00
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2010-03-10 16:20:37 -07:00
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err = mmc_wait_for_cmd(host, &cmd, 0);
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2007-05-22 12:25:21 -06:00
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if (err)
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return err;
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2010-03-10 16:20:37 -07:00
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if (mmc_host_is_spi(host)) {
|
MMC core learns about SPI
Teach the MMC/SD/SDIO core about using SPI mode.
- Use mmc_host_is_spi() so enumeration works through SPI signaling
and protocols, not just the native versions.
- Provide the SPI response type flags with each request issued,
including requests from the new lock/unlock code.
- Understand that cmd->resp[0] and mmc_get_status() results for SPI
return different values than for "native" MMC/SD protocol; this
affects resetting, checking card lock status, and some others.
- Understand that some commands act a bit differently ... notably:
* OP_COND command doesn't return the OCR
* APP_CMD status doesn't have an R1_APP_CMD analogue
Those changes required some new and updated primitives:
- Provide utilities to access two SPI-only requests, and one
request that wasn't previously needed:
* mmc_spi_read_ocr() ... SPI only
* mmc_spi_set_crc() ... SPI only (override by module parm)
* mmc_send_cid() ... for use without broadcast mode
- Updated internal routines:
* Previous mmc_send_csd() modified into mmc_send_cxd_native();
it uses native "R2" responses, which include 16 bytes of data.
* Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data()
helper for command-and-data access
* Bugfix to that mmc_send_cxd_data() code: dma-to-stack is
unsafe/nonportable, so kmalloc a bounce buffer instead.
- Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper
- Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use
those helper routines based on whether they're native or SPI
The newest categories of cards supported by the MMC stack aren't expected
to work yet with SPI: MMC or SD cards with over 4GB data, and SDIO.
All those cards support SPI mode, so eventually they should work too.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-08 10:11:32 -06:00
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/* host driver already reported errors */
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} else {
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if (cmd.resp[0] & R5_ERROR)
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return -EIO;
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if (cmd.resp[0] & R5_FUNCTION_NUMBER)
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return -EINVAL;
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if (cmd.resp[0] & R5_OUT_OF_RANGE)
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return -ERANGE;
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}
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2007-05-22 12:25:21 -06:00
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MMC core learns about SPI
Teach the MMC/SD/SDIO core about using SPI mode.
- Use mmc_host_is_spi() so enumeration works through SPI signaling
and protocols, not just the native versions.
- Provide the SPI response type flags with each request issued,
including requests from the new lock/unlock code.
- Understand that cmd->resp[0] and mmc_get_status() results for SPI
return different values than for "native" MMC/SD protocol; this
affects resetting, checking card lock status, and some others.
- Understand that some commands act a bit differently ... notably:
* OP_COND command doesn't return the OCR
* APP_CMD status doesn't have an R1_APP_CMD analogue
Those changes required some new and updated primitives:
- Provide utilities to access two SPI-only requests, and one
request that wasn't previously needed:
* mmc_spi_read_ocr() ... SPI only
* mmc_spi_set_crc() ... SPI only (override by module parm)
* mmc_send_cid() ... for use without broadcast mode
- Updated internal routines:
* Previous mmc_send_csd() modified into mmc_send_cxd_native();
it uses native "R2" responses, which include 16 bytes of data.
* Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data()
helper for command-and-data access
* Bugfix to that mmc_send_cxd_data() code: dma-to-stack is
unsafe/nonportable, so kmalloc a bounce buffer instead.
- Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper
- Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use
those helper routines based on whether they're native or SPI
The newest categories of cards supported by the MMC stack aren't expected
to work yet with SPI: MMC or SD cards with over 4GB data, and SDIO.
All those cards support SPI mode, so eventually they should work too.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-08 10:11:32 -06:00
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if (out) {
|
2010-03-10 16:20:37 -07:00
|
|
|
if (mmc_host_is_spi(host))
|
MMC core learns about SPI
Teach the MMC/SD/SDIO core about using SPI mode.
- Use mmc_host_is_spi() so enumeration works through SPI signaling
and protocols, not just the native versions.
- Provide the SPI response type flags with each request issued,
including requests from the new lock/unlock code.
- Understand that cmd->resp[0] and mmc_get_status() results for SPI
return different values than for "native" MMC/SD protocol; this
affects resetting, checking card lock status, and some others.
- Understand that some commands act a bit differently ... notably:
* OP_COND command doesn't return the OCR
* APP_CMD status doesn't have an R1_APP_CMD analogue
Those changes required some new and updated primitives:
- Provide utilities to access two SPI-only requests, and one
request that wasn't previously needed:
* mmc_spi_read_ocr() ... SPI only
* mmc_spi_set_crc() ... SPI only (override by module parm)
* mmc_send_cid() ... for use without broadcast mode
- Updated internal routines:
* Previous mmc_send_csd() modified into mmc_send_cxd_native();
it uses native "R2" responses, which include 16 bytes of data.
* Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data()
helper for command-and-data access
* Bugfix to that mmc_send_cxd_data() code: dma-to-stack is
unsafe/nonportable, so kmalloc a bounce buffer instead.
- Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper
- Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use
those helper routines based on whether they're native or SPI
The newest categories of cards supported by the MMC stack aren't expected
to work yet with SPI: MMC or SD cards with over 4GB data, and SDIO.
All those cards support SPI mode, so eventually they should work too.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-08 10:11:32 -06:00
|
|
|
*out = (cmd.resp[0] >> 8) & 0xFF;
|
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else
|
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|
*out = cmd.resp[0] & 0xFF;
|
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|
|
}
|
2007-05-22 12:25:21 -06:00
|
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|
return 0;
|
|
|
|
}
|
|
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|
|
2010-03-10 16:20:37 -07:00
|
|
|
int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
|
|
|
|
unsigned addr, u8 in, u8 *out)
|
|
|
|
{
|
|
|
|
BUG_ON(!card);
|
|
|
|
return mmc_io_rw_direct_host(card->host, write, fn, addr, in, out);
|
|
|
|
}
|
|
|
|
|
2007-07-06 05:35:01 -06:00
|
|
|
int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
|
2007-08-08 07:24:21 -06:00
|
|
|
unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz)
|
2007-07-06 05:35:01 -06:00
|
|
|
{
|
2011-08-24 13:00:50 -06:00
|
|
|
struct mmc_request mrq = {NULL};
|
2011-04-13 21:40:30 -06:00
|
|
|
struct mmc_command cmd = {0};
|
2011-04-13 21:46:05 -06:00
|
|
|
struct mmc_data data = {0};
|
2012-10-22 05:01:00 -06:00
|
|
|
struct scatterlist sg, *sg_ptr;
|
|
|
|
struct sg_table sgtable;
|
|
|
|
unsigned int nents, left_size, i;
|
|
|
|
unsigned int seg_size = card->host->max_seg_size;
|
2007-07-06 05:35:01 -06:00
|
|
|
|
|
|
|
BUG_ON(!card);
|
|
|
|
BUG_ON(fn > 7);
|
2007-08-08 07:24:21 -06:00
|
|
|
WARN_ON(blksz == 0);
|
2007-07-06 05:35:01 -06:00
|
|
|
|
2009-03-05 11:40:27 -07:00
|
|
|
/* sanity check */
|
|
|
|
if (addr & ~0x1FFFF)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2007-07-06 05:35:01 -06:00
|
|
|
mrq.cmd = &cmd;
|
|
|
|
mrq.data = &data;
|
|
|
|
|
|
|
|
cmd.opcode = SD_IO_RW_EXTENDED;
|
|
|
|
cmd.arg = write ? 0x80000000 : 0x00000000;
|
|
|
|
cmd.arg |= fn << 28;
|
2007-08-08 07:24:21 -06:00
|
|
|
cmd.arg |= incr_addr ? 0x04000000 : 0x00000000;
|
2007-07-06 05:35:01 -06:00
|
|
|
cmd.arg |= addr << 9;
|
2011-10-26 02:52:17 -06:00
|
|
|
if (blocks == 0)
|
|
|
|
cmd.arg |= (blksz == 512) ? 0 : blksz; /* byte mode */
|
2007-08-08 07:24:21 -06:00
|
|
|
else
|
|
|
|
cmd.arg |= 0x08000000 | blocks; /* block mode */
|
MMC core learns about SPI
Teach the MMC/SD/SDIO core about using SPI mode.
- Use mmc_host_is_spi() so enumeration works through SPI signaling
and protocols, not just the native versions.
- Provide the SPI response type flags with each request issued,
including requests from the new lock/unlock code.
- Understand that cmd->resp[0] and mmc_get_status() results for SPI
return different values than for "native" MMC/SD protocol; this
affects resetting, checking card lock status, and some others.
- Understand that some commands act a bit differently ... notably:
* OP_COND command doesn't return the OCR
* APP_CMD status doesn't have an R1_APP_CMD analogue
Those changes required some new and updated primitives:
- Provide utilities to access two SPI-only requests, and one
request that wasn't previously needed:
* mmc_spi_read_ocr() ... SPI only
* mmc_spi_set_crc() ... SPI only (override by module parm)
* mmc_send_cid() ... for use without broadcast mode
- Updated internal routines:
* Previous mmc_send_csd() modified into mmc_send_cxd_native();
it uses native "R2" responses, which include 16 bytes of data.
* Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data()
helper for command-and-data access
* Bugfix to that mmc_send_cxd_data() code: dma-to-stack is
unsafe/nonportable, so kmalloc a bounce buffer instead.
- Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper
- Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use
those helper routines based on whether they're native or SPI
The newest categories of cards supported by the MMC stack aren't expected
to work yet with SPI: MMC or SD cards with over 4GB data, and SDIO.
All those cards support SPI mode, so eventually they should work too.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-08 10:11:32 -06:00
|
|
|
cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
|
2007-07-06 05:35:01 -06:00
|
|
|
|
2007-08-08 07:24:21 -06:00
|
|
|
data.blksz = blksz;
|
2011-10-26 02:52:17 -06:00
|
|
|
/* Code in host drivers/fwk assumes that "blocks" always is >=1 */
|
|
|
|
data.blocks = blocks ? blocks : 1;
|
2007-07-06 05:35:01 -06:00
|
|
|
data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
|
|
|
|
|
2012-10-22 05:01:00 -06:00
|
|
|
left_size = data.blksz * data.blocks;
|
|
|
|
nents = (left_size - 1) / seg_size + 1;
|
|
|
|
if (nents > 1) {
|
|
|
|
if (sg_alloc_table(&sgtable, nents, GFP_KERNEL))
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
data.sg = sgtable.sgl;
|
|
|
|
data.sg_len = nents;
|
|
|
|
|
|
|
|
for_each_sg(data.sg, sg_ptr, data.sg_len, i) {
|
|
|
|
sg_set_page(sg_ptr, virt_to_page(buf + (i * seg_size)),
|
|
|
|
min(seg_size, left_size),
|
|
|
|
offset_in_page(buf + (i * seg_size)));
|
|
|
|
left_size = left_size - seg_size;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
data.sg = &sg;
|
|
|
|
data.sg_len = 1;
|
|
|
|
|
|
|
|
sg_init_one(&sg, buf, left_size);
|
|
|
|
}
|
2007-07-06 05:35:01 -06:00
|
|
|
|
|
|
|
mmc_set_data_timeout(&data, card);
|
|
|
|
|
|
|
|
mmc_wait_for_req(card->host, &mrq);
|
|
|
|
|
2012-10-22 05:01:00 -06:00
|
|
|
if (nents > 1)
|
|
|
|
sg_free_table(&sgtable);
|
|
|
|
|
2007-07-06 05:35:01 -06:00
|
|
|
if (cmd.error)
|
|
|
|
return cmd.error;
|
|
|
|
if (data.error)
|
|
|
|
return data.error;
|
|
|
|
|
MMC core learns about SPI
Teach the MMC/SD/SDIO core about using SPI mode.
- Use mmc_host_is_spi() so enumeration works through SPI signaling
and protocols, not just the native versions.
- Provide the SPI response type flags with each request issued,
including requests from the new lock/unlock code.
- Understand that cmd->resp[0] and mmc_get_status() results for SPI
return different values than for "native" MMC/SD protocol; this
affects resetting, checking card lock status, and some others.
- Understand that some commands act a bit differently ... notably:
* OP_COND command doesn't return the OCR
* APP_CMD status doesn't have an R1_APP_CMD analogue
Those changes required some new and updated primitives:
- Provide utilities to access two SPI-only requests, and one
request that wasn't previously needed:
* mmc_spi_read_ocr() ... SPI only
* mmc_spi_set_crc() ... SPI only (override by module parm)
* mmc_send_cid() ... for use without broadcast mode
- Updated internal routines:
* Previous mmc_send_csd() modified into mmc_send_cxd_native();
it uses native "R2" responses, which include 16 bytes of data.
* Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data()
helper for command-and-data access
* Bugfix to that mmc_send_cxd_data() code: dma-to-stack is
unsafe/nonportable, so kmalloc a bounce buffer instead.
- Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper
- Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use
those helper routines based on whether they're native or SPI
The newest categories of cards supported by the MMC stack aren't expected
to work yet with SPI: MMC or SD cards with over 4GB data, and SDIO.
All those cards support SPI mode, so eventually they should work too.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
2007-08-08 10:11:32 -06:00
|
|
|
if (mmc_host_is_spi(card->host)) {
|
|
|
|
/* host driver already reported errors */
|
|
|
|
} else {
|
|
|
|
if (cmd.resp[0] & R5_ERROR)
|
|
|
|
return -EIO;
|
|
|
|
if (cmd.resp[0] & R5_FUNCTION_NUMBER)
|
|
|
|
return -EINVAL;
|
|
|
|
if (cmd.resp[0] & R5_OUT_OF_RANGE)
|
|
|
|
return -ERANGE;
|
|
|
|
}
|
2007-07-06 05:35:01 -06:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-03-10 16:20:37 -07:00
|
|
|
int sdio_reset(struct mmc_host *host)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
u8 abort;
|
|
|
|
|
|
|
|
/* SDIO Simplified Specification V2.0, 4.4 Reset for SDIO */
|
|
|
|
|
|
|
|
ret = mmc_io_rw_direct_host(host, 0, 0, SDIO_CCCR_ABORT, 0, &abort);
|
|
|
|
if (ret)
|
|
|
|
abort = 0x08;
|
|
|
|
else
|
|
|
|
abort |= 0x08;
|
|
|
|
|
|
|
|
ret = mmc_io_rw_direct_host(host, 1, 0, SDIO_CCCR_ABORT, abort, NULL);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|