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authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-08 04:17:39 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-08 04:17:39 +0400
commit54c72d5987ff9f3cf59529d5d4f5cf19eae3f695 (patch)
tree3fee972d54926627895aa07684ddb2e2388e4614 /drivers/mmc/host
parent66bb0aa077978dbb76e6283531eb3cc7a878de38 (diff)
parent7caa79917ad4c1f91366b11f18e48623554aaa52 (diff)
downloadlinux-54c72d5987ff9f3cf59529d5d4f5cf19eae3f695.tar.xz
Merge tag 'mfd-for-linus-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD update from Lee Jones: "Changes to existing drivers: - checkpatch fixes throughout the subsystem - use Regmap to handle IRQs in max77686, extcon-max77693 and mc13xxx-core - use DMA in rtsx_pcr - restrict building on unsupported architectures on timberdale, cs5535 - SPI hardening in cros_ec_spi - more robust error handing in asic3, cros_ec, ab8500-debugfs, max77686 and pcf50633-core - reorder PM runtime and regulator handing during shutdown in arizona - enable wakeup in cros_ec_spi - unused variable/code clean-up in pm8921-core, cros_ec, htc-i2cpld, tps65912-spi, wm5110-tables and ab8500-debugfs - add regulator handing into suspend() in sec-core - remove pointless wrapper functions in extcon-max77693 and i2c-cros-ec-tunnel - use cross-architecture friendly data sizes in stmpe-i2c, arizona, max77686 and tps65910 - devicetree documentation updates throughout - provide power management support in max77686 - few OF clean-ups in max77686 - use manged resources in tps6105x New drivers/supported devices: - add support for s2mpu02 to sec-core - add support for Allwinner A32 to sun6i-prcm - add support for Maxim 77802 in max77686 - add support for DA9063 AD in da9063 - new driver for Intel PMICs (generic) and specifically Crystal Cove (Re-)moved drivers == - move out keyboard functionality cros_ec ==> input/keyboard/cros_ec_keyb" * tag 'mfd-for-linus-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (101 commits) MAINTAINERS: Update MFD repo location mfd: omap-usb-host: Fix improper mask use. mfd: arizona: Only free the CTRLIF_ERR IRQ if we requested it mfd: arizona: Add missing handling for ISRC3 under/overclocked mfd: wm5110: Add new interrupt register definitions mfd: arizona: Rename thermal shutdown interrupt mfd: wm5110: Add in the output done interrupts mfd: wm5110: Remove non-existant interrupts mfd: tps65912-spi: Remove unused variable mfd: htc-i2cpld: Remove unused code mfd: da9063: Add support for AD silicon variant mfd: arizona: Map MICVDD from extcon device to the Arizona core mfd: arizona: Add MICVDD to mapped regulators for wm8997 mfd: max77686: Ensure device type IDs are architecture agnostic mfd: max77686: Add Maxim 77802 PMIC support mfd: tps6105x: Use managed resources when allocating memory mfd: wm8997-tables: Suppress 'line over 80 chars' warnings mfd: kempld-core: Correct a variety of checkpatch warnings mfd: ipaq-micro: Fix coding style errors/warnings reported by checkpatch mfd: si476x-cmd: Remedy checkpatch style complains ...
Diffstat (limited to 'drivers/mmc/host')
-rw-r--r--drivers/mmc/host/rtsx_pci_sdmmc.c133
1 files changed, 127 insertions, 6 deletions
diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c
index 0d519649b575..dfde4a210238 100644
--- a/drivers/mmc/host/rtsx_pci_sdmmc.c
+++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
@@ -24,6 +24,7 @@
#include <linux/highmem.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
+#include <linux/workqueue.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/sd.h>
@@ -36,7 +37,10 @@ struct realtek_pci_sdmmc {
struct rtsx_pcr *pcr;
struct mmc_host *mmc;
struct mmc_request *mrq;
+ struct workqueue_struct *workq;
+#define SDMMC_WORKQ_NAME "rtsx_pci_sdmmc_workq"
+ struct work_struct work;
struct mutex host_mutex;
u8 ssc_depth;
@@ -48,6 +52,11 @@ struct realtek_pci_sdmmc {
int power_state;
#define SDMMC_POWER_ON 1
#define SDMMC_POWER_OFF 0
+
+ unsigned int sg_count;
+ s32 cookie;
+ unsigned int cookie_sg_count;
+ bool using_cookie;
};
static inline struct device *sdmmc_dev(struct realtek_pci_sdmmc *host)
@@ -86,6 +95,77 @@ static void sd_print_debug_regs(struct realtek_pci_sdmmc *host)
#define sd_print_debug_regs(host)
#endif /* DEBUG */
+/*
+ * sd_pre_dma_transfer - do dma_map_sg() or using cookie
+ *
+ * @pre: if called in pre_req()
+ * return:
+ * 0 - do dma_map_sg()
+ * 1 - using cookie
+ */
+static int sd_pre_dma_transfer(struct realtek_pci_sdmmc *host,
+ struct mmc_data *data, bool pre)
+{
+ struct rtsx_pcr *pcr = host->pcr;
+ int read = data->flags & MMC_DATA_READ;
+ int count = 0;
+ int using_cookie = 0;
+
+ if (!pre && data->host_cookie && data->host_cookie != host->cookie) {
+ dev_err(sdmmc_dev(host),
+ "error: data->host_cookie = %d, host->cookie = %d\n",
+ data->host_cookie, host->cookie);
+ data->host_cookie = 0;
+ }
+
+ if (pre || data->host_cookie != host->cookie) {
+ count = rtsx_pci_dma_map_sg(pcr, data->sg, data->sg_len, read);
+ } else {
+ count = host->cookie_sg_count;
+ using_cookie = 1;
+ }
+
+ if (pre) {
+ host->cookie_sg_count = count;
+ if (++host->cookie < 0)
+ host->cookie = 1;
+ data->host_cookie = host->cookie;
+ } else {
+ host->sg_count = count;
+ }
+
+ return using_cookie;
+}
+
+static void sdmmc_pre_req(struct mmc_host *mmc, struct mmc_request *mrq,
+ bool is_first_req)
+{
+ struct realtek_pci_sdmmc *host = mmc_priv(mmc);
+ struct mmc_data *data = mrq->data;
+
+ if (data->host_cookie) {
+ dev_err(sdmmc_dev(host),
+ "error: reset data->host_cookie = %d\n",
+ data->host_cookie);
+ data->host_cookie = 0;
+ }
+
+ sd_pre_dma_transfer(host, data, true);
+ dev_dbg(sdmmc_dev(host), "pre dma sg: %d\n", host->cookie_sg_count);
+}
+
+static void sdmmc_post_req(struct mmc_host *mmc, struct mmc_request *mrq,
+ int err)
+{
+ struct realtek_pci_sdmmc *host = mmc_priv(mmc);
+ struct rtsx_pcr *pcr = host->pcr;
+ struct mmc_data *data = mrq->data;
+ int read = data->flags & MMC_DATA_READ;
+
+ rtsx_pci_dma_unmap_sg(pcr, data->sg, data->sg_len, read);
+ data->host_cookie = 0;
+}
+
static int sd_read_data(struct realtek_pci_sdmmc *host, u8 *cmd, u16 byte_cnt,
u8 *buf, int buf_len, int timeout)
{
@@ -415,7 +495,7 @@ static int sd_rw_multi(struct realtek_pci_sdmmc *host, struct mmc_request *mrq)
rtsx_pci_send_cmd_no_wait(pcr);
- err = rtsx_pci_transfer_data(pcr, data->sg, data->sg_len, read, 10000);
+ err = rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, read, 10000);
if (err < 0) {
sd_clear_error(host);
return err;
@@ -640,12 +720,24 @@ static int sd_tuning_rx(struct realtek_pci_sdmmc *host, u8 opcode)
return 0;
}
-static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+static inline int sd_rw_cmd(struct mmc_command *cmd)
{
- struct realtek_pci_sdmmc *host = mmc_priv(mmc);
+ return mmc_op_multi(cmd->opcode) ||
+ (cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
+ (cmd->opcode == MMC_WRITE_BLOCK);
+}
+
+static void sd_request(struct work_struct *work)
+{
+ struct realtek_pci_sdmmc *host = container_of(work,
+ struct realtek_pci_sdmmc, work);
struct rtsx_pcr *pcr = host->pcr;
+
+ struct mmc_host *mmc = host->mmc;
+ struct mmc_request *mrq = host->mrq;
struct mmc_command *cmd = mrq->cmd;
struct mmc_data *data = mrq->data;
+
unsigned int data_size = 0;
int err;
@@ -677,13 +769,13 @@ static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
if (mrq->data)
data_size = data->blocks * data->blksz;
- if (!data_size || mmc_op_multi(cmd->opcode) ||
- (cmd->opcode == MMC_READ_SINGLE_BLOCK) ||
- (cmd->opcode == MMC_WRITE_BLOCK)) {
+ if (!data_size || sd_rw_cmd(cmd)) {
sd_send_cmd_get_rsp(host, cmd);
if (!cmd->error && data_size) {
sd_rw_multi(host, mrq);
+ if (!host->using_cookie)
+ sdmmc_post_req(host->mmc, host->mrq, 0);
if (mmc_op_multi(cmd->opcode) && mrq->stop)
sd_send_cmd_get_rsp(host, mrq->stop);
@@ -712,6 +804,21 @@ finish:
mmc_request_done(mmc, mrq);
}
+static void sdmmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+ struct realtek_pci_sdmmc *host = mmc_priv(mmc);
+ struct mmc_data *data = mrq->data;
+
+ mutex_lock(&host->host_mutex);
+ host->mrq = mrq;
+ mutex_unlock(&host->host_mutex);
+
+ if (sd_rw_cmd(mrq->cmd))
+ host->using_cookie = sd_pre_dma_transfer(host, data, false);
+
+ queue_work(host->workq, &host->work);
+}
+
static int sd_set_bus_width(struct realtek_pci_sdmmc *host,
unsigned char bus_width)
{
@@ -1146,6 +1253,8 @@ out:
}
static const struct mmc_host_ops realtek_pci_sdmmc_ops = {
+ .pre_req = sdmmc_pre_req,
+ .post_req = sdmmc_post_req,
.request = sdmmc_request,
.set_ios = sdmmc_set_ios,
.get_ro = sdmmc_get_ro,
@@ -1224,10 +1333,16 @@ static int rtsx_pci_sdmmc_drv_probe(struct platform_device *pdev)
return -ENOMEM;
host = mmc_priv(mmc);
+ host->workq = create_singlethread_workqueue(SDMMC_WORKQ_NAME);
+ if (!host->workq) {
+ mmc_free_host(mmc);
+ return -ENOMEM;
+ }
host->pcr = pcr;
host->mmc = mmc;
host->pdev = pdev;
host->power_state = SDMMC_POWER_OFF;
+ INIT_WORK(&host->work, sd_request);
platform_set_drvdata(pdev, host);
pcr->slots[RTSX_SD_CARD].p_dev = pdev;
pcr->slots[RTSX_SD_CARD].card_event = rtsx_pci_sdmmc_card_event;
@@ -1255,6 +1370,8 @@ static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
pcr->slots[RTSX_SD_CARD].card_event = NULL;
mmc = host->mmc;
+ cancel_work_sync(&host->work);
+
mutex_lock(&host->host_mutex);
if (host->mrq) {
dev_dbg(&(pdev->dev),
@@ -1273,6 +1390,10 @@ static int rtsx_pci_sdmmc_drv_remove(struct platform_device *pdev)
mmc_remove_host(mmc);
host->eject = true;
+ flush_workqueue(host->workq);
+ destroy_workqueue(host->workq);
+ host->workq = NULL;
+
mmc_free_host(mmc);
dev_dbg(&(pdev->dev),