Merge "mmc: sdhci-msm: Ping with known good phase"

drivers/char/Kconfig

@@ -633,5 +633,12 @@ config MSM_RDBG
 	  for a debugger running on a host PC to communicate with a remote
 	  stub running on peripheral subsystems such as the ADSP, MODEM etc.
 
+config QCOM_SDIO_CLIENT
+	bool "QCOM_SDIO_CLIENT support"
+	depends on SDIO_QCN
+	default y
+	help
+	  Interface used for SDIO and sahara user spce application
+
 endmenu
 

drivers/char/Makefile

@@ -67,3 +67,4 @@ ifdef CONFIG_COMPAT
 obj-$(CONFIG_MSM_ADSPRPC)       += adsprpc_compat.o
 endif
 obj-$(CONFIG_MSM_RDBG)		+= rdbg.o
+obj-$(CONFIG_QCOM_SDIO_CLIENT)	+= qti_sdio_client.o

drivers/char/qti_sdio_client.c

@@ -80,7 +80,7 @@
 static bool to_console;
 module_param(to_console, bool, S_IRUGO | S_IWUSR | S_IWGRP);
 
-static bool ipc_log = 1;
+static bool ipc_log;
 module_param(ipc_log, bool, S_IRUGO | S_IWUSR | S_IWGRP);
 
 
@@ -143,7 +143,7 @@ struct qti_sdio_bridge {
 	unsigned int mdata_count;
 	unsigned int tx_ready_count;
 	unsigned int data_avail_count;
-
+	atomic_t is_client_closing;
 };
 
 struct data_avail_node {
@@ -282,7 +282,7 @@ void qti_client_data_avail_cb(struct sdio_al_channel_handle *ch_handle,
 		ret = sdio_al_queue_transfer(qsb->channel_handle,
 				SDIO_AL_RX, rx_dma_buf, padded_len, 0);
 		if (ret == 1) {
-			pr_err("TRACK: operating in async mode now\n");
+			pr_debug("operating in async mode now\n");
 			goto out;
 		}
 		if (ret) {
@@ -413,9 +413,10 @@ int qti_client_read(int id, char *buf, size_t count)
 	int bytes = 0;
 	struct qti_sdio_bridge *qsb = NULL;
 
-	if ((id < QCN_SDIO_CLI_ID_TTY) || (id > QCN_SDIO_CLI_ID_DIAG)) {
+	if ((id < QCN_SDIO_CLI_ID_TTY) || (id > QCN_SDIO_CLI_ID_DIAG) ||
+				atomic_read(&qsbdev[id]->is_client_closing)) {
 		pr_err("%s invalid client ID %d\n", __func__, id);
-		return ret;
+		return -ENODEV;
 	}
 
 	qsb = qsbdev[id];
@@ -428,7 +429,10 @@ int qti_client_read(int id, char *buf, size_t count)
 		goto out;
 	}
 
-	wait_event(qsb->wait_q, qsb->data_avail);
+	wait_event(qsb->wait_q, qsb->data_avail ||
+					atomic_read(&qsb->is_client_closing));
+	if (atomic_read(&qsb->is_client_closing))
+		return count;
 
 	bytes = qsb->data_avail;
 
@@ -496,6 +500,9 @@ int qti_client_write(int id, char *buf, size_t count)
 	struct qti_sdio_bridge *qsb = NULL;
 	DECLARE_COMPLETION_ONSTACK(tx_complete);
 
+	if (atomic_read(&qsbdev[id]->is_client_closing))
+		return -ENODEV;
+
 	switch (id) {
 	case QCN_SDIO_CLI_ID_TTY:
 		event = TTY_TX_BUF_SZ_EVENT;
@@ -572,7 +579,10 @@ int qti_client_write(int id, char *buf, size_t count)
 		qlog(qsb, "MDATA: %x\n", mdata);
 		qsb->mdata_count++;
 
-		wait_event(qsb->wait_q, qsb->tx_ready);
+		wait_event(qsb->wait_q, qsb->tx_ready ||
+					atomic_read(&qsb->is_client_closing));
+		if (atomic_read(&qsb->is_client_closing))
+			return count;
 
 		if (qsb->mode) {
 			reinit_completion(&tx_complete);
@@ -865,6 +875,7 @@ static int qti_client_probe(struct sdio_al_client_handle *client_handle)
 		qsb->priv_dev_info = diag_pdev;
 	}
 
+	atomic_set(&qsb->is_client_closing, 0);
 	qlog(qsb, "probed client %s\n", qsb->name);
 	return 0;
 
@@ -905,8 +916,12 @@ static int qti_client_remove(struct sdio_al_client_handle *client_handle)
 	}
 
 	qsb = qsbdev[client_handle->id];
+
+	atomic_set(&qsb->is_client_closing, 1);
+	wake_up(&qsb->wait_q);
+
 	tty_dev = (struct tty_device *)qsb->priv_dev_info;
-	if (tty_dev->qsb_device && client_handle->id == QCN_SDIO_CLI_ID_TTY) {
+	if (client_handle->id == QCN_SDIO_CLI_ID_TTY && tty_dev->qsb_device) {
 		minor_no = MINOR(tty_dev->qsb_device->devt);
 		major_no = MAJOR(tty_dev->qsb_device->devt);
 		device_destroy(tty_dev->qsb_class, MKDEV(major_no, minor_no));

drivers/mmc/host/sdhci-msm.c

@@ -2,7 +2,7 @@
  * drivers/mmc/host/sdhci-msm.c - Qualcomm Technologies, Inc. MSM SDHCI Platform
  * driver source file
  *
- * Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -1288,6 +1288,34 @@ retry:
 		} else {
 			pr_debug("%s: %s: found ## bad ## phase = %d\n",
 				mmc_hostname(mmc), __func__, phase);
+
+			if (phase == 15 && tuned_phase_cnt) {
+				pr_err("%s: %s: Ping with known good phase\n",
+					mmc_hostname(mmc), __func__);
+				/* set the phase in delay line hw block */
+				rc = msm_config_cm_dll_phase(host,
+					tuned_phases[tuned_phase_cnt - 1]);
+				if (rc)
+					goto kfree;
+
+				cmd.opcode = opcode;
+				cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+
+				data.blksz = size;
+				data.blocks = 1;
+				data.flags = MMC_DATA_READ;
+				data.timeout_ns = 1000 * 1000 * 1000;
+
+				data.sg = &sg;
+				data.sg_len = 1;
+				sg_init_one(&sg, data_buf, size);
+				memset(data_buf, 0, size);
+				mmc_wait_for_req(mmc, &mrq);
+
+				if ((cmd.error || data.error))
+					pr_err("%s: %s: Ping with known good phase failed\n",
+					mmc_hostname(mmc), __func__);
+			}
 		}
 	} while (++phase < 16);
 

drivers/platform/msm/Makefile

@@ -16,3 +16,4 @@ obj-$(CONFIG_SEEMP_CORE) += seemp_core/
 obj-$(CONFIG_USB_BAM) += usb_bam.o
 obj-$(CONFIG_MSM_MHI_DEV) += mhi_dev/
 obj-$(CONFIG_MSM_EXT_DISPLAY) += msm_ext_display.o
+obj-$(CONFIG_SDIO_QCN) += qcn/

drivers/platform/msm/qcn/qcn_sdio.c

@@ -33,6 +33,8 @@ module_param(rx_dump, bool, S_IRUGO | S_IWUSR | S_IWGRP);
 static int dump_len = 32;
 module_param(dump_len, int, S_IRUGO | S_IWUSR | S_IWGRP);
 
+static struct mmc_host *current_host;
+
 #define HEX_DUMP(mode, buf, len)				\
 	print_hex_dump(KERN_ERR, mode, 2, 32, 4, buf,		\
 			dump_len > len ? len : dump_len, 0)
@@ -65,6 +67,8 @@ static struct list_head cinfo_head;
 static atomic_t status;
 static spinlock_t async_lock;
 
+static int qcn_create_sysfs(struct device *dev);
+
 #if (QCN_SDIO_META_VER_0)
 #define	META_INFO(event, data)						  \
 	((u32)((u32)data << QCN_SDIO_HMETA_DATA_SHFT) |			  \
@@ -587,6 +591,18 @@ static int qcn_sdio_recv_buff(u32 cid, void *buff, size_t len)
 	return ret;
 }
 
+static void qcn_sdio_purge_rw_buff(void)
+{
+	struct qcn_sdio_rw_info *rw_req = NULL;
+
+	while (!list_empty(&sdio_ctxt->rw_wait_q)) {
+		rw_req = list_first_entry(&sdio_ctxt->rw_wait_q,
+						struct qcn_sdio_rw_info, list);
+		list_del(&rw_req->list);
+		qcn_sdio_free_rw_req(rw_req);
+	}
+}
+
 static void qcn_sdio_rw_work(struct work_struct *work)
 {
 	int ret = 0;
@@ -685,11 +701,14 @@ int qcn_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id)
 
 	qcn_enable_async_irq(true);
 	sdio_release_host(sdio_ctxt->func);
+
 	if (qcn_read_meta_info()) {
 		pr_err("%s: Error: SDIO Config\n", __func__);
 		qcn_send_meta_info((u8)QCN_SDIO_SW_MODE_HEVENT, (u32)0);
 	}
 
+	current_host = func->card->host;
+
 	return 0;
 err:
 	kfree(sdio_ctxt);
@@ -702,7 +721,13 @@ static void qcn_sdio_remove(struct sdio_func *func)
 	struct qcn_sdio_client_info *cinfo = NULL;
 	struct qcn_sdio_ch_info *ch_info = NULL;
 
+	sdio_claim_host(sdio_ctxt->func);
 	qcn_enable_async_irq(false);
+	sdio_release_host(sdio_ctxt->func);
+
+	qcn_sdio_purge_rw_buff();
+
+	destroy_workqueue(sdio_ctxt->qcn_sdio_wq);
 	mutex_lock(&lock);
 	list_for_each_entry(cinfo, &cinfo_head, cli_list) {
 		while (!list_empty(&cinfo->ch_head)) {
@@ -711,11 +736,18 @@ static void qcn_sdio_remove(struct sdio_func *func)
 			sdio_al_deregister_channel(&ch_info->ch_handle);
 		}
 		mutex_unlock(&lock);
-		cinfo->cli_data.remove(&cinfo->cli_handle);
+		if (cinfo->is_probed) {
+			cinfo->cli_data.remove(&cinfo->cli_handle);
+			cinfo->is_probed = 0;
+		}
 		mutex_lock(&lock);
 	}
 	mutex_unlock(&lock);
-	destroy_workqueue(sdio_ctxt->qcn_sdio_wq);
+
+	sdio_claim_host(sdio_ctxt->func);
+	sdio_release_irq(sdio_ctxt->func);
+	sdio_release_host(sdio_ctxt->func);
+
 	kfree(sdio_ctxt);
 	sdio_ctxt = NULL;
 }
@@ -752,6 +784,8 @@ static int qcn_sdio_plat_probe(struct platform_device *pdev)
 
 	init_completion(&client_probe_complete);
 
+	qcn_create_sysfs(&pdev->dev);
+
 	return ret;
 }
 
@@ -1120,3 +1154,55 @@ int sdio_al_meta_transfer(struct sdio_al_channel_handle *handle,
 	return qcn_send_meta_info(event, data);
 }
 EXPORT_SYMBOL(sdio_al_meta_transfer);
+
+int qcn_sdio_card_state(bool enable)
+{
+	int ret = 0;
+
+	if (!current_host)
+		return -ENODEV;
+
+	mmc_try_claim_host(current_host, 2000);
+	if (enable) {
+		ret = mmc_add_host(current_host);
+		if (ret)
+			pr_err("%s ret = %d\n", __func__, ret);
+	} else {
+		mmc_remove_host(current_host);
+	}
+	mmc_release_host(current_host);
+
+	return ret;
+}
+EXPORT_SYMBOL(qcn_sdio_card_state);
+
+static ssize_t qcn_card_state(struct device *dev,
+			      struct device_attribute *attr,
+			      const char *buf,
+			      size_t count)
+{
+	int state = 0;
+
+	if (sscanf(buf, "%du", &state) != 1)
+		return -EINVAL;
+
+	qcn_sdio_card_state(state);
+
+	return count;
+}
+static DEVICE_ATTR(card_state, 0220, NULL, qcn_card_state);
+
+static int qcn_create_sysfs(struct device *dev)
+{
+	int ret = 0;
+
+	ret = device_create_file(dev, &dev_attr_card_state);
+	if (ret) {
+		pr_err("Failed to create device file, err = %d\n", ret);
+		goto out;
+	}
+
+	return 0;
+out:
+	return ret;
+}

include/linux/qcn_sdio_al.h

@@ -292,4 +292,5 @@ int sdio_al_meta_transfer(struct sdio_al_channel_handle *ch_handle,
 		unsigned int data, unsigned int trans);
 
 extern void qcn_sdio_client_probe_complete(int id);
+int qcn_sdio_card_state(bool enable);
 #endif /* _QCN_SDIO_AL_ */