[PATCH 1/2] net wireless wcn36xx add wcnss platform code
Andy Green
andy.green at linaro.org
Sat Jan 17 21:16:45 PST 2015
From: Eugene Krasnikov <k.eugene.e at gmail.com>
AG modified to remove regulator handling not needed on msm8916-qrd
Signed-off-by: Eugene Krasnikov <k.eugene.e at gmail.com>
Signed-off-by: Andy Green <andy.green at linaro.org>
---
drivers/net/wireless/ath/wcn36xx/Makefile | 2
drivers/net/wireless/ath/wcn36xx/wcn36xx-msm.c | 357 ++++++++++++++++++++++++
2 files changed, 358 insertions(+), 1 deletion(-)
create mode 100644 drivers/net/wireless/ath/wcn36xx/wcn36xx-msm.c
diff --git a/drivers/net/wireless/ath/wcn36xx/Makefile b/drivers/net/wireless/ath/wcn36xx/Makefile
index 50c43b4..e889f2c 100644
--- a/drivers/net/wireless/ath/wcn36xx/Makefile
+++ b/drivers/net/wireless/ath/wcn36xx/Makefile
@@ -1,4 +1,4 @@
-obj-$(CONFIG_WCN36XX) := wcn36xx.o
+obj-$(CONFIG_WCN36XX) := wcn36xx.o wcn36xx-msm.o
wcn36xx-y += main.o \
dxe.o \
txrx.o \
diff --git a/drivers/net/wireless/ath/wcn36xx/wcn36xx-msm.c b/drivers/net/wireless/ath/wcn36xx/wcn36xx-msm.c
new file mode 100644
index 0000000..f6f6c83
--- /dev/null
+++ b/drivers/net/wireless/ath/wcn36xx/wcn36xx-msm.c
@@ -0,0 +1,357 @@
+/*
+ * Copyright (c) 2013 Eugene Krasnikov <k.eugene.e at gmail.com>
+ * Copyright (c) 2013 Qualcomm Atheros, Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/completion.h>
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/workqueue.h>
+#include <soc/qcom/smd.h>
+#include <soc/qcom/smsm.h>
+#include "wcn36xx.h"
+
+#include <soc/qcom/subsystem_restart.h>
+#include <soc/qcom/subsystem_notif.h>
+
+#define MAC_ADDR_0 "wlan/macaddr0"
+
+static void *pil;
+
+struct wcn36xx_msm {
+ struct wcn36xx_platform_ctrl_ops ctrl_ops;
+ struct platform_device *core;
+ void *drv_priv;
+ void (*rsp_cb)(void *drv_priv, void *buf, size_t len);
+ /* SMD related */
+ struct workqueue_struct *wq;
+ struct work_struct smd_work;
+ struct completion smd_compl;
+ smd_channel_t *smd_ch;
+ struct pinctrl *pinctrl;
+} wmsm;
+
+static int wcn36xx_msm_smsm_change_state(u32 clear_mask, u32 set_mask)
+{
+ return smsm_change_state(SMSM_APPS_STATE, clear_mask, set_mask);
+}
+
+static int wcn36xx_msm_get_hw_mac(u8 *addr)
+{
+ const struct firmware *addr_file = NULL;
+ int status;
+ u8 tmp[18];
+ static const u8 qcom_oui[3] = {0x00, 0x0A, 0xF5};
+ static const char *files = {MAC_ADDR_0};
+
+ status = request_firmware(&addr_file, files, &wmsm.core->dev);
+
+ if (status < 0) {
+ /* Assign a random mac with Qualcomm oui */
+ dev_err(&wmsm.core->dev, "Failed (%d) to read macaddress file %s, using a random address instead", status,
+ files);
+ memcpy(addr, qcom_oui, 3);
+ get_random_bytes(addr + 3, 3);
+ } else {
+ memset(tmp, 0, sizeof(tmp));
+ memcpy(tmp, addr_file->data, sizeof(tmp) - 1);
+ sscanf(tmp, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
+ &addr[0],
+ &addr[1],
+ &addr[2],
+ &addr[3],
+ &addr[4],
+ &addr[5]);
+
+ release_firmware(addr_file);
+ }
+
+ return 0;
+}
+
+static int wcn36xx_msm_smd_send_and_wait(char *buf, size_t len)
+{
+ int avail;
+ int ret = 0;
+
+ avail = smd_write_avail(wmsm.smd_ch);
+
+ if (avail >= len) {
+ avail = smd_write(wmsm.smd_ch, buf, len);
+ if (avail != len) {
+ dev_err(&wmsm.core->dev,
+ "Cannot write to SMD channel\n");
+ ret = -EAGAIN;
+ goto out;
+ }
+ } else {
+ dev_err(&wmsm.core->dev,
+ "SMD channel can accept only %d bytes\n", avail);
+ ret = -ENOMEM;
+ goto out;
+ }
+
+out:
+ return ret;
+}
+
+static void wcn36xx_msm_smd_notify(void *data, unsigned event)
+{
+ struct wcn36xx_msm *wmsm_priv = (struct wcn36xx_msm *)data;
+
+ switch (event) {
+ case SMD_EVENT_OPEN:
+ complete(&wmsm_priv->smd_compl);
+ break;
+ case SMD_EVENT_DATA:
+ queue_work(wmsm_priv->wq, &wmsm_priv->smd_work);
+ break;
+ case SMD_EVENT_CLOSE:
+ break;
+ case SMD_EVENT_STATUS:
+ break;
+ case SMD_EVENT_REOPEN_READY:
+ break;
+ default:
+ dev_err(&wmsm_priv->core->dev,
+ "%s: SMD_EVENT (%d) not supported\n", __func__, event);
+ break;
+ }
+}
+
+static void wcn36xx_msm_smd_work(struct work_struct *work)
+{
+ int avail;
+ int msg_len;
+ void *msg;
+ int ret;
+ struct wcn36xx_msm *wmsm_priv =
+ container_of(work, struct wcn36xx_msm, smd_work);
+
+ while (1) {
+ msg_len = smd_cur_packet_size(wmsm_priv->smd_ch);
+ if (0 == msg_len) {
+ return;
+ }
+ avail = smd_read_avail(wmsm_priv->smd_ch);
+ if (avail < msg_len) {
+ return;
+ }
+ msg = kmalloc(msg_len, GFP_KERNEL);
+ if (NULL == msg) {
+ return;
+ }
+
+ ret = smd_read(wmsm_priv->smd_ch, msg, msg_len);
+ if (ret != msg_len) {
+ return;
+ }
+ wmsm_priv->rsp_cb(wmsm_priv->drv_priv, msg, msg_len);
+ kfree(msg);
+ }
+}
+
+int wcn36xx_msm_smd_open(void *drv_priv, void *rsp_cb)
+{
+ int ret, left;
+ wmsm.drv_priv = drv_priv;
+ wmsm.rsp_cb = rsp_cb;
+ INIT_WORK(&wmsm.smd_work, wcn36xx_msm_smd_work);
+ init_completion(&wmsm.smd_compl);
+
+ wmsm.wq = create_workqueue("wcn36xx_msm_smd_wq");
+ if (!wmsm.wq) {
+ dev_err(&wmsm.core->dev, "failed to allocate wq");
+ ret = -ENOMEM;
+ return ret;
+ }
+
+ ret = smd_named_open_on_edge("WLAN_CTRL", SMD_APPS_WCNSS,
+ &wmsm.smd_ch, &wmsm, wcn36xx_msm_smd_notify);
+ if (ret) {
+ dev_err(&wmsm.core->dev,
+ "smd_named_open_on_edge failed: %d\n", ret);
+ return ret;
+ }
+
+ left = wait_for_completion_interruptible_timeout(&wmsm.smd_compl,
+ msecs_to_jiffies(HAL_MSG_TIMEOUT));
+ if (left <= 0) {
+ dev_err(&wmsm.core->dev,
+ "timeout waiting for smd open: %d\n", ret);
+ return left;
+ }
+
+ /* Not to receive INT until the whole buf from SMD is read */
+ smd_disable_read_intr(wmsm.smd_ch);
+
+ return 0;
+}
+
+void wcn36xx_msm_smd_close(void)
+{
+ smd_close(wmsm.smd_ch);
+ flush_workqueue(wmsm.wq);
+ destroy_workqueue(wmsm.wq);
+}
+
+int wcn36xx_msm_shutdown(const struct subsys_desc *desc, bool force_stop)
+{
+ return 0;
+}
+int wcn36xx_msm_powerup(const struct subsys_desc *desc)
+{
+ return 0;
+}
+
+static int wcn36xx_msm_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct resource *wcnss_memory;
+ struct resource *tx_irq;
+ struct resource *rx_irq;
+ struct resource res[3];
+ struct pinctrl_state *ps;
+
+ wmsm.pinctrl = devm_pinctrl_get(&pdev->dev);
+ if (IS_ERR_OR_NULL(wmsm.pinctrl))
+ return PTR_ERR(wmsm.pinctrl);
+
+ ps = pinctrl_lookup_state(wmsm.pinctrl, "wcnss_default");
+ if (IS_ERR_OR_NULL(ps))
+ return PTR_ERR(ps);
+
+ ret = pinctrl_select_state(wmsm.pinctrl, ps);
+ if (ret)
+ return ret;
+
+ if (IS_ERR_OR_NULL(pil))
+ pil = subsystem_get("wcnss");
+ if (IS_ERR_OR_NULL(pil))
+ return PTR_ERR(pil);
+
+ wmsm.core = platform_device_alloc("wcn36xx", -1);
+
+ //dev_err(&pdev->dev, "%s starting\n", __func__);
+
+ memset(res, 0x00, sizeof(res));
+ wmsm.ctrl_ops.open = wcn36xx_msm_smd_open;
+ wmsm.ctrl_ops.close = wcn36xx_msm_smd_close;
+ wmsm.ctrl_ops.tx = wcn36xx_msm_smd_send_and_wait;
+ wmsm.ctrl_ops.get_hw_mac = wcn36xx_msm_get_hw_mac;
+ wmsm.ctrl_ops.smsm_change_state = wcn36xx_msm_smsm_change_state;
+ wcnss_memory =
+ platform_get_resource_byname(pdev,
+ IORESOURCE_MEM,
+ "wcnss_mmio");
+ if (wcnss_memory == NULL) {
+ dev_err(&wmsm.core->dev,
+ "Failed to get wcnss wlan memory map.\n");
+ ret = -ENOMEM;
+ return ret;
+ }
+ memcpy(&res[0], wcnss_memory, sizeof(*wcnss_memory));
+
+ tx_irq = platform_get_resource_byname(pdev,
+ IORESOURCE_IRQ,
+ "wcnss_wlantx_irq");
+ if (tx_irq == NULL) {
+ dev_err(&wmsm.core->dev, "Failed to get wcnss tx_irq");
+ ret = -ENOMEM;
+ return ret;
+ }
+ memcpy(&res[1], tx_irq, sizeof(*tx_irq));
+
+ rx_irq = platform_get_resource_byname(pdev,
+ IORESOURCE_IRQ,
+ "wcnss_wlanrx_irq");
+ if (rx_irq == NULL) {
+ dev_err(&wmsm.core->dev, "Failed to get wcnss rx_irq");
+ ret = -ENOMEM;
+ return ret;
+ }
+ memcpy(&res[2], rx_irq, sizeof(*rx_irq));
+
+ platform_device_add_resources(wmsm.core, res, ARRAY_SIZE(res));
+
+ ret = platform_device_add_data(wmsm.core, &wmsm.ctrl_ops,
+ sizeof(wmsm.ctrl_ops));
+ if (ret) {
+ dev_err(&wmsm.core->dev, "Can't add platform data\n");
+ ret = -ENOMEM;
+ return ret;
+ }
+
+ platform_device_add(wmsm.core);
+
+ dev_info(&pdev->dev, "%s initialized\n", __func__);
+
+ return 0;
+}
+static int wcn36xx_msm_remove(struct platform_device *pdev)
+{
+ struct pinctrl_state *ps;
+
+ platform_device_del(wmsm.core);
+ platform_device_put(wmsm.core);
+
+ if (wmsm.pinctrl) {
+ ps = pinctrl_lookup_state(wmsm.pinctrl, "wcnss_sleep");
+ if (IS_ERR_OR_NULL(ps))
+ return PTR_ERR(ps);
+
+ pinctrl_select_state(wmsm.pinctrl, ps);
+ }
+
+ return 0;
+}
+
+static const struct of_device_id wcn36xx_msm_match_table[] = {
+ { .compatible = "qcom,wcn36xx" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, wcn36xx_msm_match_table);
+
+static struct platform_driver wcn36xx_msm_driver = {
+ .probe = wcn36xx_msm_probe,
+ .remove = wcn36xx_msm_remove,
+ .driver = {
+ .name = "wcn36xx-msm",
+ .owner = THIS_MODULE,
+ .of_match_table = wcn36xx_msm_match_table,
+ },
+};
+
+static int __init wcn36xx_msm_init(void)
+{
+ return platform_driver_register(&wcn36xx_msm_driver);
+}
+module_init(wcn36xx_msm_init);
+
+static void __exit wcn36xx_msm_exit(void)
+{
+ platform_driver_unregister(&wcn36xx_msm_driver);
+ if (pil)
+ subsystem_put(pil);
+
+
+}
+module_exit(wcn36xx_msm_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Eugene Krasnikov k.eugene.e at gmail.com");
+MODULE_FIRMWARE(MAC_ADDR_0);
+
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