When we switch to transaction-based runtime PM on SDHI / TMIO MMC,
also card eject events will have to be detected by the platform.
This patch prepares mackerel to this switch.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
---
arch/arm/mach-shmobile/board-mackerel.c | 68 +++++++++++++++++++++++++++----
1 files changed, 60 insertions(+), 8 deletions(-)
diff --git a/arch/arm/mach-shmobile/board-mackerel.c b/arch/arm/mach-shmobile/board-mackerel.c
index 1b30195..05f5fe7 100644
--- a/arch/arm/mach-shmobile/board-mackerel.c
+++ b/arch/arm/mach-shmobile/board-mackerel.c
@@ -45,6 +45,7 @@
#include <linux/tca6416_keypad.h>
#include <linux/usb/r8a66597.h>
#include <linux/usb/renesas_usbhs.h>
+#include <linux/workqueue.h>
#include <video/sh_mobile_hdmi.h>
#include <video/sh_mobile_lcdc.h>
@@ -990,7 +991,7 @@ static struct platform_device fsi_ak4643_device = {
/*
* The card detect pin of the top SD/MMC slot (CN7) is active low and is
- * connected to GPIO A22 of SH7372 (GPIO_PORT41).
+ * connected to GPIO A22 of SH7372 (GPIO_PORT41 / IRQ8).
*/
static int slot_cn7_get_cd(struct platform_device *pdev)
{
@@ -998,12 +999,49 @@ static int slot_cn7_get_cd(struct platform_device *pdev)
}
/* SDHI0 */
-static irqreturn_t mackerel_sdhi0_gpio_cd(int irq, void *arg)
+struct sdhi_card_detect {
+ struct delayed_work work;
+ struct sh_mobile_sdhi_info *info;
+ int gpio_irq;
+ int gpio_port;
+ int gpio_cd;
+};
+
+static void sdhi_cd_work(struct work_struct *work)
+{
+ struct sdhi_card_detect *cd = container_of(work, struct sdhi_card_detect, work.work);
+ int ret;
+
+ if (cd->gpio_cd >= 0)
+ gpio_free(cd->gpio_cd);
+ ret = gpio_request(cd->gpio_port, NULL);
+ if (!ret) {
+ gpio_direction_input(cd->gpio_port);
+ ret = gpio_get_value(cd->gpio_port);
+ gpio_free(cd->gpio_port);
+ if (ret)
+ /* No card */
+ irq_set_irq_type(cd->gpio_irq, IRQ_TYPE_EDGE_FALLING);
+ else
+ /* Card in the slot */
+ irq_set_irq_type(cd->gpio_irq, IRQ_TYPE_EDGE_RISING);
+ }
+ if (cd->gpio_cd >= 0)
+ gpio_request(cd->gpio_cd, NULL);
+}
+
+static irqreturn_t mackerel_sdhi_gpio_cd(int irq, void *arg)
{
- struct device *dev = arg;
- struct sh_mobile_sdhi_info *info = dev->platform_data;
+ struct sdhi_card_detect *cd = arg;
+ struct sh_mobile_sdhi_info *info = cd->info;
struct tmio_mmc_data *pdata = info->pdata;
+ if (irq != cd->gpio_irq)
+ return IRQ_NONE;
+
+ irq_set_irq_type(irq, IRQ_TYPE_NONE);
+
+ schedule_delayed_work(&cd->work, msecs_to_jiffies(200));
tmio_mmc_cd_wakeup(pdata);
return IRQ_HANDLED;
@@ -1015,6 +1053,14 @@ static struct sh_mobile_sdhi_info sdhi0_info = {
.tmio_caps = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
};
+static struct sdhi_card_detect sdhi0_cd = {
+ .work = __DELAYED_WORK_INITIALIZER(sdhi0_cd.work, sdhi_cd_work),
+ .info = &sdhi0_info,
+ .gpio_irq = evt2irq(0x3340),
+ .gpio_port = GPIO_PORT172,
+ .gpio_cd = GPIO_FN_SDHICD0,
+};
+
static struct resource sdhi0_resources[] = {
[0] = {
.name = "SDHI0",
@@ -1092,7 +1138,7 @@ static struct platform_device sdhi1_device = {
/*
* The card detect pin of the top SD/MMC slot (CN23) is active low and is
- * connected to GPIO SCIFB_SCK of SH7372 (GPIO_PORT162).
+ * connected to GPIO SCIFB_SCK of SH7372 (GPIO_PORT162 / IRQ0).
*/
static int slot_cn23_get_cd(struct platform_device *pdev)
{
@@ -1500,12 +1546,18 @@ static void __init mackerel_init(void)
gpio_request(GPIO_FN_SDHID0_1, NULL);
gpio_request(GPIO_FN_SDHID0_0, NULL);
- ret = request_irq(evt2irq(0x3340), mackerel_sdhi0_gpio_cd,
- IRQF_TRIGGER_FALLING, "sdhi0 cd", &sdhi0_device.dev);
+ /*
+ * If the driver probes with a card plugged in, the native SDHICD0 IRQ
+ * will trigger, when the runtime PM brings the interface up, and the
+ * card will be detected. This interrupt is needed if there is no card
+ * during probing and runtime PM turns the interface power off.
+ */
+ ret = request_irq(sdhi0_cd.gpio_irq, mackerel_sdhi_gpio_cd,
+ IRQF_TRIGGER_FALLING, "sdhi0 cd", &sdhi0_cd);
if (!ret)
sdhi0_info.tmio_flags |= TMIO_MMC_HAS_COLD_CD;
else
- pr_err("Cannot get IRQ #%d: %d\n", evt2irq(0x3340), ret);
+ pr_err("Cannot get IRQ #%d: %d\n", sdhi0_cd.gpio_irq, ret);
#if !defined(CONFIG_MMC_SH_MMCIF) && !defined(CONFIG_MMC_SH_MMCIF_MODULE)
/* enable SDHI1 */
--
1.7.2.5
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