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Merge tag 'mmc-merge-for-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc

Browse Source 
Pull MMC updates from Chris Ball:
 "MMC highlights for 3.6:

  Core:
   - Rename cd-gpio to slot-gpio and extend it to support more slot GPIO
     functions, such as write-protect.
   - Add a function to get regulators (Vdd and Vccq) for a host.

  Drivers:
   - sdhci-pxav2, sdhci-pxav3: Add device tree support.
   - sdhi: Add device tree support.
   - sh_mmcif: Add support for regulators, device tree, slot-gpio.
   - tmio: Add regulator support, use slot-gpio."

* tag 'mmc-merge-for-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc: (62 commits)
  mmc: sdhci-dove: Prepare for common clock framework
  mmc: sdhci-dove: Add SDHCI_QUIRK_NO_HISPD_BIT
  mmc: omap_hsmmc: ensure probe returns error upon resource failure
  mmc: mxs-mmc: Add wp-inverted property
  mmc: esdhc: Fix DMA_MASK to not break mx25 DMA access
  mmc: core: reset signal voltage on power up
  mmc: sd: Fix sd current limit setting
  mmc: omap_hsmmc: add clk_prepare and clk_unprepare
  mmc: sdhci: When a UHS switch fails, cycle power if regulator is used
  mmc: atmel-mci: modify CLKDIV displaying in debugfs
  mmc: atmel-mci: fix incorrect setting of host->data to NULL
  mmc: sdhci: poll for card even when card is logically unremovable
  mmc: sdhci: Introduce new flag SDHCI_USING_RETUNING_TIMER
  mmc: sdio: Change pr_warning to pr_warn_ratelimited
  mmc: core: Simplify and fix for SD switch processing
  mmc: sdhci: restore host settings when card is removed
  mmc: sdhci: fix incorrect command used in tuning
  mmc: sdhci-pci: CaFe has broken card detection
  mmc: sdhci: Report failure reasons for all cases in sdhci_add_host()
  mmc: s3cmci: Convert s3cmci driver to gpiolib API
  ...
This commit is contained in:
Linus Torvalds
2012-07-22 16:36:08 -07:00
parent 5b160bd426 30b87c60e9
commit a6be1fcbc5
43 changed files with 1057 additions and 519 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Documentation/devicetree/bindings/mmc/fsl-esdhc.txt
+13 -12
View File
@@ -3,21 +3,22 @@
The Enhanced Secure Digital Host Controller provides an interface
for MMC, SD, and SDIO types of memory cards.
This file documents differences between the core properties described
by mmc.txt and the properties used by the sdhci-esdhc driver.
Required properties:
- compatible : should be
"fsl,<chip>-esdhc", "fsl,esdhc"
- reg : should contain eSDHC registers location and length.
- interrupts : should contain eSDHC interrupt.
- interrupt-parent : interrupt source phandle.
- clock-frequency : specifies eSDHC base clock frequency.
- sdhci,wp-inverted : (optional) specifies that eSDHC controller
reports inverted write-protect state; New devices should use
the generic "wp-inverted" property.
- sdhci,1-bit-only : (optional) specifies that a controller can
only handle 1-bit data transfers. New devices should use the
generic "bus-width = <1>" property.
- sdhci,auto-cmd12: (optional) specifies that a controller can
only handle auto CMD12.
Optional properties:
- sdhci,wp-inverted : specifies that eSDHC controller reports
inverted write-protect state; New devices should use the generic
"wp-inverted" property.
- sdhci,1-bit-only : specifies that a controller can only handle
1-bit data transfers. New devices should use the generic
"bus-width = <1>" property.
- sdhci,auto-cmd12: specifies that a controller can only handle auto
CMD12.
Example:
Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.txt
+3 -5
View File
@@ -3,17 +3,15 @@
The Enhanced Secure Digital Host Controller on Freescale i.MX family
provides an interface for MMC, SD, and SDIO types of memory cards.
This file documents differences between the core properties described
by mmc.txt and the properties used by the sdhci-esdhc-imx driver.
Required properties:
- compatible : Should be "fsl,<chip>-esdhc"
- reg : Should contain eSDHC registers location and length
- interrupts : Should contain eSDHC interrupt
Optional properties:
- non-removable : Indicate the card is wired to host permanently
- fsl,cd-internal : Indicate to use controller internal card detection
- fsl,wp-internal : Indicate to use controller internal write protection
- cd-gpios : Specify GPIOs for card detection
- wp-gpios : Specify GPIOs for write protection
Examples:
Documentation/devicetree/bindings/mmc/mmc-spi-slot.txt
+4 -4
View File
@@ -1,8 +1,9 @@
MMC/SD/SDIO slot directly connected to a SPI bus
This file documents differences between the core properties described
by mmc.txt and the properties used by the mmc_spi driver.
Required properties:
- compatible : should be "mmc-spi-slot".
- reg : should specify SPI address (chip-select number).
- spi-max-frequency : maximum frequency for this device (Hz).
- voltage-ranges : two cells are required, first cell specifies minimum
slot voltage (mV), second cell specifies maximum slot voltage (mV).
@@ -11,8 +12,7 @@ Required properties:
Optional properties:
- gpios : may specify GPIOs in this order: Card-Detect GPIO,
Write-Protect GPIO. Note that this does not follow the
binding from mmc.txt, for historic reasons.
- interrupts : the interrupt of a card detect interrupt.
binding from mmc.txt, for historical reasons.
- interrupt-parent : the phandle for the interrupt controller that
services interrupts for this device.
Documentation/devicetree/bindings/mmc/mmc.txt
+7 -3
View File
@@ -2,13 +2,17 @@ These properties are common to multiple MMC host controllers. Any host
that requires the respective functionality should implement them using
these definitions.
Interpreted by the OF core:
- reg: Registers location and length.
- interrupts: Interrupts used by the MMC controller.
Required properties:
- bus-width: Number of data lines, can be <1>, <4>, or <8>
Optional properties:
- cd-gpios : Specify GPIOs for card detection, see gpio binding
- wp-gpios : Specify GPIOs for write protection, see gpio binding
- cd-inverted: when present, polarity on the wp gpio line is inverted
- cd-gpios: Specify GPIOs for card detection, see gpio binding
- wp-gpios: Specify GPIOs for write protection, see gpio binding
- cd-inverted: when present, polarity on the cd gpio line is inverted
- wp-inverted: when present, polarity on the wp gpio line is inverted
- non-removable: non-removable slot (like eMMC)
- max-frequency: maximum operating clock frequency
Documentation/devicetree/bindings/mmc/mmci.txt
+4 -8
View File
@@ -1,19 +1,15 @@
* ARM PrimeCell MultiMedia Card Interface (MMCI) PL180/1
The ARM PrimeCell MMCI PL180 and PL181 provides and interface for
The ARM PrimeCell MMCI PL180 and PL181 provides an interface for
reading and writing to MultiMedia and SD cards alike.
This file documents differences between the core properties described
by mmc.txt and the properties used by the mmci driver.
Required properties:
- compatible : contains "arm,pl18x", "arm,primecell".
- reg : contains pl18x registers and length.
- interrupts : contains the device IRQ(s).
- arm,primecell-periphid : contains the PrimeCell Peripheral ID.
Optional properties:
- wp-gpios : contains any write protect (ro) gpios
- cd-gpios : contains any card detection gpios
- cd-inverted : indicates whether the cd gpio is inverted
- max-frequency : contains the maximum operating frequency
- bus-width : number of data lines, can be <1>, <4>, or <8>
- mmc-cap-mmc-highspeed : indicates whether MMC is high speed capable
- mmc-cap-sd-highspeed : indicates whether SD is high speed capable
Documentation/devicetree/bindings/mmc/mxs-mmc.txt
+3 -5
View File
@@ -3,16 +3,14 @@
The Freescale MXS Synchronous Serial Ports (SSP) can act as a MMC controller
to support MMC, SD, and SDIO types of memory cards.
This file documents differences between the core properties in mmc.txt
and the properties used by the mxsmmc driver.
Required properties:
- compatible: Should be "fsl,<chip>-mmc". The supported chips include
imx23 and imx28.
- reg: Should contain registers location and length
- interrupts: Should contain ERROR and DMA interrupts
- fsl,ssp-dma-channel: APBH DMA channel for the SSP
- bus-width: Number of data lines, can be <1>, <4>, or <8>
Optional properties:
- wp-gpios: Specify GPIOs for write protection
Examples:
Documentation/devicetree/bindings/mmc/nvidia-sdhci.txt
+3 -5
View File
@@ -3,15 +3,13 @@
This controller on Tegra family SoCs provides an interface for MMC, SD,
and SDIO types of memory cards.
This file documents differences between the core properties described
by mmc.txt and the properties used by the sdhci-tegra driver.
Required properties:
- compatible : Should be "nvidia,<chip>-sdhci"
- reg : Should contain SD/MMC registers location and length
- interrupts : Should contain SD/MMC interrupt
- bus-width : Number of data lines, can be <1>, <4>, or <8>
Optional properties:
- cd-gpios : Specify GPIOs for card detection
- wp-gpios : Specify GPIOs for write protection
- power-gpios : Specify GPIOs for power control
Example:
Documentation/devicetree/bindings/mmc/sdhci-pxa.txt
+21
View File
@@ -0,0 +1,21 @@
* Marvell sdhci-pxa v2/v3 controller
This file documents differences between the core properties in mmc.txt
and the properties used by the sdhci-pxav2 and sdhci-pxav3 drivers.
Required properties:
- compatible: Should be "mrvl,pxav2-mmc" or "mrvl,pxav3-mmc".
Optional properties:
- mrvl,clk-delay-cycles: Specify a number of cycles to delay for tuning.
Example:
sdhci@d4280800 {
compatible = "mrvl,pxav3-mmc";
reg = <0xd4280800 0x800>;
bus-width = <8>;
interrupts = <27>;
non-removable;
mrvl,clk-delay-cycles = <31>;
};
Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
+3 -4
View File
@@ -3,21 +3,20 @@
The Highspeed MMC Host Controller on TI OMAP family
provides an interface for MMC, SD, and SDIO types of memory cards.
This file documents differences between the core properties described
by mmc.txt and the properties used by the omap_hsmmc driver.
Required properties:
- compatible:
Should be "ti,omap2-hsmmc", for OMAP2 controllers
Should be "ti,omap3-hsmmc", for OMAP3 controllers
Should be "ti,omap4-hsmmc", for OMAP4 controllers
- ti,hwmods: Must be "mmc<n>", n is controller instance starting 1
- reg : should contain hsmmc registers location and length
Optional properties:
ti,dual-volt: boolean, supports dual voltage cards
<supply-name>-supply: phandle to the regulator device tree node
"supply-name" examples are "vmmc", "vmmc_aux" etc
bus-width: Number of data lines, default assumed is 1 if the property is missing.
cd-gpios: GPIOs for card detection
wp-gpios: GPIOs for write protection
ti,non-removable: non-removable slot (like eMMC)
ti,needs-special-reset: Requires a special softreset sequence
drivers/mmc/card/block.c
+9 -27
View File
@@ -850,9 +850,7 @@ out:
goto retry;
if (!err)
mmc_blk_reset_success(md, type);
spin_lock_irq(&md->lock);
__blk_end_request(req, err, blk_rq_bytes(req));
spin_unlock_irq(&md->lock);
blk_end_request(req, err, blk_rq_bytes(req));
return err ? 0 : 1;
}
@@ -934,9 +932,7 @@ out_retry:
if (!err)
mmc_blk_reset_success(md, type);
out:
spin_lock_irq(&md->lock);
__blk_end_request(req, err, blk_rq_bytes(req));
spin_unlock_irq(&md->lock);
blk_end_request(req, err, blk_rq_bytes(req));
return err ? 0 : 1;
}
@@ -951,9 +947,7 @@ static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
if (ret)
ret = -EIO;
spin_lock_irq(&md->lock);
__blk_end_request_all(req, ret);
spin_unlock_irq(&md->lock);
blk_end_request_all(req, ret);
return ret ? 0 : 1;
}
@@ -1252,14 +1246,10 @@ static int mmc_blk_cmd_err(struct mmc_blk_data *md, struct mmc_card *card,
blocks = mmc_sd_num_wr_blocks(card);
if (blocks != (u32)-1) {
spin_lock_irq(&md->lock);
ret = __blk_end_request(req, 0, blocks << 9);
spin_unlock_irq(&md->lock);
ret = blk_end_request(req, 0, blocks << 9);
}
} else {
spin_lock_irq(&md->lock);
ret = __blk_end_request(req, 0, brq->data.bytes_xfered);
spin_unlock_irq(&md->lock);
ret = blk_end_request(req, 0, brq->data.bytes_xfered);
}
return ret;
}
@@ -1311,10 +1301,8 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
* A block was successfully transferred.
*/
mmc_blk_reset_success(md, type);
spin_lock_irq(&md->lock);
ret = __blk_end_request(req, 0,
ret = blk_end_request(req, 0,
brq->data.bytes_xfered);
spin_unlock_irq(&md->lock);
/*
* If the blk_end_request function returns non-zero even
* though all data has been transferred and no errors
@@ -1364,10 +1352,8 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
* time, so we only reach here after trying to
* read a single sector.
*/
spin_lock_irq(&md->lock);
ret = __blk_end_request(req, -EIO,
ret = blk_end_request(req, -EIO,
brq->data.blksz);
spin_unlock_irq(&md->lock);
if (!ret)
goto start_new_req;
break;
@@ -1388,12 +1374,10 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *rqc)
return 1;
cmd_abort:
spin_lock_irq(&md->lock);
if (mmc_card_removed(card))
req->cmd_flags |= REQ_QUIET;
while (ret)
ret = __blk_end_request(req, -EIO, blk_rq_cur_bytes(req));
spin_unlock_irq(&md->lock);
ret = blk_end_request(req, -EIO, blk_rq_cur_bytes(req));
start_new_req:
if (rqc) {
@@ -1417,9 +1401,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
ret = mmc_blk_part_switch(card, md);
if (ret) {
if (req) {
spin_lock_irq(&md->lock);
__blk_end_request_all(req, -EIO);
spin_unlock_irq(&md->lock);
blk_end_request_all(req, -EIO);
}
ret = 0;
goto out;
drivers/mmc/core/Makefile
+1 -1
View File
@@ -7,6 +7,6 @@ mmc_core-y := core.o bus.o host.o \
mmc.o mmc_ops.o sd.o sd_ops.o \
sdio.o sdio_ops.o sdio_bus.o \
sdio_cis.o sdio_io.o sdio_irq.o \
quirks.o cd-gpio.o
quirks.o slot-gpio.o
mmc_core-$(CONFIG_DEBUG_FS) += debugfs.o
drivers/mmc/core/cd-gpio.c
-83
View File
@@ -1,83 +0,0 @@
/*
* Generic GPIO card-detect helper
*
* Copyright (C) 2011, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
*
* 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/err.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/mmc/cd-gpio.h>
#include <linux/mmc/host.h>
#include <linux/module.h>
#include <linux/slab.h>
struct mmc_cd_gpio {
unsigned int gpio;
char label[0];
};
static irqreturn_t mmc_cd_gpio_irqt(int irq, void *dev_id)
{
/* Schedule a card detection after a debounce timeout */
mmc_detect_change(dev_id, msecs_to_jiffies(100));
return IRQ_HANDLED;
}
int mmc_cd_gpio_request(struct mmc_host *host, unsigned int gpio)
{
size_t len = strlen(dev_name(host->parent)) + 4;
struct mmc_cd_gpio *cd;
int irq = gpio_to_irq(gpio);
int ret;
if (irq < 0)
return irq;
cd = kmalloc(sizeof(*cd) + len, GFP_KERNEL);
if (!cd)
return -ENOMEM;
snprintf(cd->label, len, "%s cd", dev_name(host->parent));
ret = gpio_request_one(gpio, GPIOF_DIR_IN, cd->label);
if (ret < 0)
goto egpioreq;
ret = request_threaded_irq(irq, NULL, mmc_cd_gpio_irqt,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
IRQF_ONESHOT, cd->label, host);
if (ret < 0)
goto eirqreq;
cd->gpio = gpio;
host->hotplug.irq = irq;
host->hotplug.handler_priv = cd;
return 0;
eirqreq:
gpio_free(gpio);
egpioreq:
kfree(cd);
return ret;
}
EXPORT_SYMBOL(mmc_cd_gpio_request);
void mmc_cd_gpio_free(struct mmc_host *host)
{
struct mmc_cd_gpio *cd = host->hotplug.handler_priv;
if (!cd)
return;
free_irq(host->hotplug.irq, host);
gpio_free(cd->gpio);
kfree(cd);
}
EXPORT_SYMBOL(mmc_cd_gpio_free);
drivers/mmc/core/core.c
+62 -28
View File
@@ -404,6 +404,7 @@ int mmc_interrupt_hpi(struct mmc_card *card)
{
int err;
u32 status;
unsigned long prg_wait;
BUG_ON(!card);
@@ -419,30 +420,38 @@ int mmc_interrupt_hpi(struct mmc_card *card)
goto out;
}
/*
* If the card status is in PRG-state, we can send the HPI command.
*/
if (R1_CURRENT_STATE(status) == R1_STATE_PRG) {
do {
/*
* We don't know when the HPI command will finish
* processing, so we need to resend HPI until out
* of prg-state, and keep checking the card status
* with SEND_STATUS. If a timeout error occurs when
* sending the HPI command, we are already out of
* prg-state.
*/
err = mmc_send_hpi_cmd(card, &status);
if (err)
pr_debug("%s: abort HPI (%d error)\n",
mmc_hostname(card->host), err);
switch (R1_CURRENT_STATE(status)) {
case R1_STATE_IDLE:
case R1_STATE_READY:
case R1_STATE_STBY:
/*
* In idle states, HPI is not needed and the caller
* can issue the next intended command immediately
*/
goto out;
case R1_STATE_PRG:
break;
default:
/* In all other states, it's illegal to issue HPI */
pr_debug("%s: HPI cannot be sent. Card state=%d\n",
mmc_hostname(card->host), R1_CURRENT_STATE(status));
err = -EINVAL;
goto out;
}
err = mmc_send_status(card, &status);
if (err)
break;
} while (R1_CURRENT_STATE(status) == R1_STATE_PRG);
} else
pr_debug("%s: Left prg-state\n", mmc_hostname(card->host));
err = mmc_send_hpi_cmd(card, &status);
if (err)
goto out;
prg_wait = jiffies + msecs_to_jiffies(card->ext_csd.out_of_int_time);
do {
err = mmc_send_status(card, &status);
if (!err && R1_CURRENT_STATE(status) == R1_STATE_TRAN)
break;
if (time_after(jiffies, prg_wait))
err = -ETIMEDOUT;
} while (!err);
out:
mmc_release_host(card->host);
@@ -941,7 +950,7 @@ int mmc_regulator_get_ocrmask(struct regulator *supply)
return result;
}
EXPORT_SYMBOL(mmc_regulator_get_ocrmask);
EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask);
/**
* mmc_regulator_set_ocr - set regulator to match host->ios voltage
@@ -1011,7 +1020,30 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc,
"could not set regulator OCR (%d)\n", result);
return result;
}
EXPORT_SYMBOL(mmc_regulator_set_ocr);
EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr);
int mmc_regulator_get_supply(struct mmc_host *mmc)
{
struct device *dev = mmc_dev(mmc);
struct regulator *supply;
int ret;
supply = devm_regulator_get(dev, "vmmc");
mmc->supply.vmmc = supply;
mmc->supply.vqmmc = devm_regulator_get(dev, "vqmmc");
if (IS_ERR(supply))
return PTR_ERR(supply);
ret = mmc_regulator_get_ocrmask(supply);
if (ret > 0)
mmc->ocr_avail = ret;
else
dev_warn(mmc_dev(mmc), "Failed getting OCR mask: %d\n", ret);
return 0;
}
EXPORT_SYMBOL_GPL(mmc_regulator_get_supply);
#endif /* CONFIG_REGULATOR */
@@ -1180,6 +1212,9 @@ static void mmc_power_up(struct mmc_host *host)
host->ios.timing = MMC_TIMING_LEGACY;
mmc_set_ios(host);
/* Set signal voltage to 3.3V */
mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, false);
/*
* This delay should be sufficient to allow the power supply
* to reach the minimum voltage.
@@ -1931,9 +1966,6 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
*/
mmc_hw_reset_for_init(host);
/* Initialization should be done at 3.3 V I/O voltage. */
mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
/*
* sdio_reset sends CMD52 to reset card. Since we do not know
* if the card is being re-initialized, just send it. CMD52
@@ -2075,6 +2107,7 @@ void mmc_rescan(struct work_struct *work)
void mmc_start_host(struct mmc_host *host)
{
host->f_init = max(freqs[0], host->f_min);
host->rescan_disable = 0;
mmc_power_up(host);
mmc_detect_change(host, 0);
}
@@ -2088,6 +2121,7 @@ void mmc_stop_host(struct mmc_host *host)
spin_unlock_irqrestore(&host->lock, flags);
#endif
host->rescan_disable = 1;
cancel_delayed_work_sync(&host->detect);
mmc_flush_scheduled_work();
drivers/mmc/core/host.c
+6
View File
@@ -32,6 +32,7 @@
static void mmc_host_classdev_release(struct device *dev)
{
struct mmc_host *host = cls_dev_to_mmc_host(dev);
mutex_destroy(&host->slot.lock);
kfree(host);
}
@@ -312,6 +313,8 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
if (!host)
return NULL;
/* scanning will be enabled when we're ready */
host->rescan_disable = 1;
spin_lock(&mmc_host_lock);
err = idr_get_new(&mmc_host_idr, host, &host->index);
spin_unlock(&mmc_host_lock);
@@ -327,6 +330,9 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
mmc_host_clk_init(host);
mutex_init(&host->slot.lock);
host->slot.cd_irq = -EINVAL;
spin_lock_init(&host->lock);
init_waitqueue_head(&host->wq);
INIT_DELAYED_WORK(&host->detect, mmc_rescan);
drivers/mmc/core/mmc.c
-3
View File
@@ -818,9 +818,6 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
if (!mmc_host_is_spi(host))
mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
/* Initialization should be done at 3.3 V I/O voltage. */
mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
/*
* Since we're changing the OCR value, we seem to
* need to tell some cards to go back to the idle
drivers/mmc/core/mmc_ops.c
-1
View File
@@ -569,7 +569,6 @@ int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status)
cmd.opcode = opcode;
cmd.arg = card->rca << 16 | 1;
cmd.cmd_timeout_ms = card->ext_csd.out_of_int_time;
err = mmc_wait_for_cmd(card->host, &cmd, 0);
if (err) {
drivers/mmc/core/sd.c
+79 -92
View File
@@ -244,7 +244,7 @@ static int mmc_read_ssr(struct mmc_card *card)
* bitfield positions accordingly.
*/
au = UNSTUFF_BITS(ssr, 428 - 384, 4);
if (au > 0 || au <= 9) {
if (au > 0 && au <= 9) {
card->ssr.au = 1 << (au + 4);
es = UNSTUFF_BITS(ssr, 408 - 384, 16);
et = UNSTUFF_BITS(ssr, 402 - 384, 6);
@@ -290,8 +290,12 @@ static int mmc_read_switch(struct mmc_card *card)
return -ENOMEM;
}
/* Find out the supported Bus Speed Modes. */
err = mmc_sd_switch(card, 0, 0, 1, status);
/*
* Find out the card's support bits with a mode 0 operation.
* The argument does not matter, as the support bits do not
* change with the arguments.
*/
err = mmc_sd_switch(card, 0, 0, 0, status);
if (err) {
/*
* If the host or the card can't do the switch,
@@ -312,46 +316,8 @@ static int mmc_read_switch(struct mmc_card *card)
if (card->scr.sda_spec3) {
card->sw_caps.sd3_bus_mode = status[13];
/* Find out Driver Strengths supported by the card */
err = mmc_sd_switch(card, 0, 2, 1, status);
if (err) {
/*
* If the host or the card can't do the switch,
* fail more gracefully.
*/
if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
goto out;
pr_warning("%s: problem reading "
"Driver Strength.\n",
mmc_hostname(card->host));
err = 0;
goto out;
}
/* Driver Strengths supported by the card */
card->sw_caps.sd3_drv_type = status[9];
/* Find out Current Limits supported by the card */
err = mmc_sd_switch(card, 0, 3, 1, status);
if (err) {
/*
* If the host or the card can't do the switch,
* fail more gracefully.
*/
if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
goto out;
pr_warning("%s: problem reading "
"Current Limit.\n",
mmc_hostname(card->host));
err = 0;
goto out;
}
card->sw_caps.sd3_curr_limit = status[7];
}
out:
@@ -551,60 +517,80 @@ static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status)
return 0;
}
/* Get host's max current setting at its current voltage */
static u32 sd_get_host_max_current(struct mmc_host *host)
{
u32 voltage, max_current;
voltage = 1 << host->ios.vdd;
switch (voltage) {
case MMC_VDD_165_195:
max_current = host->max_current_180;
break;
case MMC_VDD_29_30:
case MMC_VDD_30_31:
max_current = host->max_current_300;
break;
case MMC_VDD_32_33:
case MMC_VDD_33_34:
max_current = host->max_current_330;
break;
default:
max_current = 0;
}
return max_current;
}
static int sd_set_current_limit(struct mmc_card *card, u8 *status)
{
int current_limit = 0;
int current_limit = SD_SET_CURRENT_NO_CHANGE;
int err;
u32 max_current;
/*
* Current limit switch is only defined for SDR50, SDR104, and DDR50
* bus speed modes. For other bus speed modes, we set the default
* current limit of 200mA.
* bus speed modes. For other bus speed modes, we do not change the
* current limit.
*/
if ((card->sd_bus_speed == UHS_SDR50_BUS_SPEED) ||
(card->sd_bus_speed == UHS_SDR104_BUS_SPEED) ||
(card->sd_bus_speed == UHS_DDR50_BUS_SPEED)) {
if (card->host->caps & MMC_CAP_MAX_CURRENT_800) {
if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800)
current_limit = SD_SET_CURRENT_LIMIT_800;
else if (card->sw_caps.sd3_curr_limit &
SD_MAX_CURRENT_600)
current_limit = SD_SET_CURRENT_LIMIT_600;
else if (card->sw_caps.sd3_curr_limit &
SD_MAX_CURRENT_400)
current_limit = SD_SET_CURRENT_LIMIT_400;
else if (card->sw_caps.sd3_curr_limit &
SD_MAX_CURRENT_200)
current_limit = SD_SET_CURRENT_LIMIT_200;
} else if (card->host->caps & MMC_CAP_MAX_CURRENT_600) {
if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600)
current_limit = SD_SET_CURRENT_LIMIT_600;
else if (card->sw_caps.sd3_curr_limit &
SD_MAX_CURRENT_400)
current_limit = SD_SET_CURRENT_LIMIT_400;
else if (card->sw_caps.sd3_curr_limit &
SD_MAX_CURRENT_200)
current_limit = SD_SET_CURRENT_LIMIT_200;
} else if (card->host->caps & MMC_CAP_MAX_CURRENT_400) {
if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400)
current_limit = SD_SET_CURRENT_LIMIT_400;
else if (card->sw_caps.sd3_curr_limit &
SD_MAX_CURRENT_200)
current_limit = SD_SET_CURRENT_LIMIT_200;
} else if (card->host->caps & MMC_CAP_MAX_CURRENT_200) {
if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200)
current_limit = SD_SET_CURRENT_LIMIT_200;
}
} else
if ((card->sd_bus_speed != UHS_SDR50_BUS_SPEED) &&
(card->sd_bus_speed != UHS_SDR104_BUS_SPEED) &&
(card->sd_bus_speed != UHS_DDR50_BUS_SPEED))
return 0;
/*
* Host has different current capabilities when operating at
* different voltages, so find out its max current first.
*/
max_current = sd_get_host_max_current(card->host);
/*
* We only check host's capability here, if we set a limit that is
* higher than the card's maximum current, the card will be using its
* maximum current, e.g. if the card's maximum current is 300ma, and
* when we set current limit to 200ma, the card will draw 200ma, and
* when we set current limit to 400/600/800ma, the card will draw its
* maximum 300ma from the host.
*/
if (max_current >= 800)
current_limit = SD_SET_CURRENT_LIMIT_800;
else if (max_current >= 600)
current_limit = SD_SET_CURRENT_LIMIT_600;
else if (max_current >= 400)
current_limit = SD_SET_CURRENT_LIMIT_400;
else if (max_current >= 200)
current_limit = SD_SET_CURRENT_LIMIT_200;
err = mmc_sd_switch(card, 1, 3, current_limit, status);
if (err)
return err;
if (current_limit != SD_SET_CURRENT_NO_CHANGE) {
err = mmc_sd_switch(card, 1, 3, current_limit, status);
if (err)
return err;
if (((status[15] >> 4) & 0x0F) != current_limit)
pr_warning("%s: Problem setting current limit!\n",
mmc_hostname(card->host));
if (((status[15] >> 4) & 0x0F) != current_limit)
pr_warning("%s: Problem setting current limit!\n",
mmc_hostname(card->host));
}
return 0;
}
@@ -726,6 +712,7 @@ struct device_type sd_type = {
int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
{
int err;
u32 max_current;
/*
* Since we're changing the OCR value, we seem to
@@ -753,9 +740,12 @@ int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50))
ocr |= SD_OCR_S18R;
/* If the host can supply more than 150mA, XPC should be set to 1. */
if (host->caps & (MMC_CAP_SET_XPC_330 | MMC_CAP_SET_XPC_300 |
MMC_CAP_SET_XPC_180))
/*
* If the host can supply more than 150mA at current voltage,
* XPC should be set to 1.
*/
max_current = sd_get_host_max_current(host);
if (max_current > 150)
ocr |= SD_OCR_XPC;
try_again:
@@ -911,9 +901,6 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
BUG_ON(!host);
WARN_ON(!host->claimed);
/* The initialization should be done at 3.3 V I/O voltage. */
mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
err = mmc_sd_get_cid(host, ocr, cid, &rocr);
if (err)
return err;
drivers/mmc/core/sdio.c
-7
View File
@@ -591,9 +591,6 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
* Inform the card of the voltage
*/
if (!powered_resume) {
/* The initialization should be done at 3.3 V I/O voltage. */
mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
err = mmc_send_io_op_cond(host, host->ocr, &ocr);
if (err)
goto err;
@@ -1006,10 +1003,6 @@ static int mmc_sdio_power_restore(struct mmc_host *host)
* restore the correct voltage setting of the card.
*/
/* The initialization should be done at 3.3 V I/O voltage. */
if (!mmc_card_keep_power(host))
mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330, 0);
sdio_reset(host);
mmc_go_idle(host);
mmc_send_if_cond(host, host->ocr_avail);
drivers/mmc/core/sdio_cis.c
+1 -1
View File
@@ -313,7 +313,7 @@ static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
if (ret == -ENOENT) {
/* warn about unknown tuples */
pr_warning("%s: queuing unknown"
pr_warn_ratelimited("%s: queuing unknown"
" CIS tuple 0x%02x (%u bytes)\n",
mmc_hostname(card->host),
tpl_code, tpl_link);
drivers/mmc/core/slot-gpio.c
+188
View File
@@ -0,0 +1,188 @@
/*
* Generic GPIO card-detect helper
*
* Copyright (C) 2011, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
*
* 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/err.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/mmc/host.h>
#include <linux/mmc/slot-gpio.h>
#include <linux/module.h>
#include <linux/slab.h>
struct mmc_gpio {
int ro_gpio;
int cd_gpio;
char *ro_label;
char cd_label[0];
};
static irqreturn_t mmc_gpio_cd_irqt(int irq, void *dev_id)
{
/* Schedule a card detection after a debounce timeout */
mmc_detect_change(dev_id, msecs_to_jiffies(100));
return IRQ_HANDLED;
}
static int mmc_gpio_alloc(struct mmc_host *host)
{
size_t len = strlen(dev_name(host->parent)) + 4;
struct mmc_gpio *ctx;
mutex_lock(&host->slot.lock);
ctx = host->slot.handler_priv;
if (!ctx) {
/*
* devm_kzalloc() can be called after device_initialize(), even
* before device_add(), i.e., between mmc_alloc_host() and
* mmc_add_host()
*/
ctx = devm_kzalloc(&host->class_dev, sizeof(*ctx) + 2 * len,
GFP_KERNEL);
if (ctx) {
ctx->ro_label = ctx->cd_label + len;
snprintf(ctx->cd_label, len, "%s cd", dev_name(host->parent));
snprintf(ctx->ro_label, len, "%s ro", dev_name(host->parent));
ctx->cd_gpio = -EINVAL;
ctx->ro_gpio = -EINVAL;
host->slot.handler_priv = ctx;
}
}
mutex_unlock(&host->slot.lock);
return ctx ? 0 : -ENOMEM;
}
int mmc_gpio_get_ro(struct mmc_host *host)
{
struct mmc_gpio *ctx = host->slot.handler_priv;
if (!ctx || !gpio_is_valid(ctx->ro_gpio))
return -ENOSYS;
return !gpio_get_value_cansleep(ctx->ro_gpio) ^
!!(host->caps2 & MMC_CAP2_RO_ACTIVE_HIGH);
}
EXPORT_SYMBOL(mmc_gpio_get_ro);
int mmc_gpio_get_cd(struct mmc_host *host)
{
struct mmc_gpio *ctx = host->slot.handler_priv;
if (!ctx || !gpio_is_valid(ctx->cd_gpio))
return -ENOSYS;
return !gpio_get_value_cansleep(ctx->cd_gpio) ^
!!(host->caps2 & MMC_CAP2_CD_ACTIVE_HIGH);
}
EXPORT_SYMBOL(mmc_gpio_get_cd);
int mmc_gpio_request_ro(struct mmc_host *host, unsigned int gpio)
{
struct mmc_gpio *ctx;
int ret;
if (!gpio_is_valid(gpio))
return -EINVAL;
ret = mmc_gpio_alloc(host);
if (ret < 0)
return ret;
ctx = host->slot.handler_priv;
return gpio_request_one(gpio, GPIOF_DIR_IN, ctx->ro_label);
}
EXPORT_SYMBOL(mmc_gpio_request_ro);
int mmc_gpio_request_cd(struct mmc_host *host, unsigned int gpio)
{
struct mmc_gpio *ctx;
int irq = gpio_to_irq(gpio);
int ret;
ret = mmc_gpio_alloc(host);
if (ret < 0)
return ret;
ctx = host->slot.handler_priv;
ret = gpio_request_one(gpio, GPIOF_DIR_IN, ctx->cd_label);
if (ret < 0)
/*
* don't bother freeing memory. It might still get used by other
* slot functions, in any case it will be freed, when the device
* is destroyed.
*/
return ret;
/*
* Even if gpio_to_irq() returns a valid IRQ number, the platform might
* still prefer to poll, e.g., because that IRQ number is already used
* by another unit and cannot be shared.
*/
if (irq >= 0 && host->caps & MMC_CAP_NEEDS_POLL)
irq = -EINVAL;
if (irq >= 0) {
ret = request_threaded_irq(irq, NULL, mmc_gpio_cd_irqt,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
ctx->cd_label, host);
if (ret < 0)
irq = ret;
}
host->slot.cd_irq = irq;
if (irq < 0)
host->caps |= MMC_CAP_NEEDS_POLL;
ctx->cd_gpio = gpio;
return 0;
}
EXPORT_SYMBOL(mmc_gpio_request_cd);
void mmc_gpio_free_ro(struct mmc_host *host)
{
struct mmc_gpio *ctx = host->slot.handler_priv;
int gpio;
if (!ctx || !gpio_is_valid(ctx->ro_gpio))
return;
gpio = ctx->ro_gpio;
ctx->ro_gpio = -EINVAL;
gpio_free(gpio);
}
EXPORT_SYMBOL(mmc_gpio_free_ro);
void mmc_gpio_free_cd(struct mmc_host *host)
{
struct mmc_gpio *ctx = host->slot.handler_priv;
int gpio;
if (!ctx || !gpio_is_valid(ctx->cd_gpio))
return;
if (host->slot.cd_irq >= 0) {
free_irq(host->slot.cd_irq, host);
host->slot.cd_irq = -EINVAL;
}
gpio = ctx->cd_gpio;
ctx->cd_gpio = -EINVAL;
gpio_free(gpio);
}
EXPORT_SYMBOL(mmc_gpio_free_cd);

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