1 files changed, 520 insertions, 0 deletions
diff --git a/drivers/net/wireless/wl12xx/sdio_test.c b/drivers/net/wireless/wl12xx/sdio_test.c
new file mode 100644
index 000000000000..9fcbd3dd8490
--- /dev/null
+++ b/drivers/net/wireless/wl12xx/sdio_test.c
@@ -0,0 +1,520 @@
+/*
+ * SDIO testing driver for wl12xx
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ *
+ * Contact: Roger Quadros <roger.quadros@nokia.com>
+ *
+ * wl12xx read/write routines taken from the main module
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/crc7.h>
+#include <linux/vmalloc.h>
+#include <linux/mmc/sdio_func.h>
+#include <linux/mmc/sdio_ids.h>
+#include <linux/mmc/card.h>
+#include <linux/gpio.h>
+#include <linux/wl12xx.h>
+#include <linux/kthread.h>
+#include <linux/firmware.h>
+#include <linux/pm_runtime.h>
+
+#include "wl12xx.h"
+#include "io.h"
+#include "boot.h"
+
+#ifndef SDIO_VENDOR_ID_TI
+#define SDIO_VENDOR_ID_TI		0x0097
+#endif
+
+#ifndef SDIO_DEVICE_ID_TI_WL1271
+#define SDIO_DEVICE_ID_TI_WL1271	0x4076
+#endif
+
+static bool rx, tx;
+
+module_param(rx, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(rx, "Perform rx test. Default (0). "
+	"This test continuously reads data from the SDIO device.\n");
+
+module_param(tx, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(tx, "Perform tx test. Default (0). "
+	"This test continuously writes data to the SDIO device.\n");
+
+struct wl1271_test {
+	struct wl1271 wl;
+	struct task_struct *test_task;
+};
+
+static const struct sdio_device_id wl1271_devices[] = {
+	{ SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
+	{}
+};
+
+static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
+{
+	return wl->if_priv;
+}
+
+static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
+{
+	return &(wl_to_func(wl)->dev);
+}
+
+static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
+		size_t len, bool fixed)
+{
+	int ret = 0;
+	struct sdio_func *func = wl_to_func(wl);
+
+	if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
+		((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
+		wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
+				addr, ((u8 *)buf)[0]);
+	} else {
+		if (fixed)
+			ret = sdio_readsb(func, buf, addr, len);
+		else
+			ret = sdio_memcpy_fromio(func, buf, addr, len);
+
+		wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
+				addr, len);
+		wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
+	}
+
+	if (ret)
+		wl1271_error("sdio read failed (%d)", ret);
+}
+
+static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
+		size_t len, bool fixed)
+{
+	int ret = 0;
+	struct sdio_func *func = wl_to_func(wl);
+
+	if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
+		sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
+		wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
+				addr, ((u8 *)buf)[0]);
+	} else {
+		wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
+				addr, len);
+		wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
+
+		if (fixed)
+			ret = sdio_writesb(func, addr, buf, len);
+		else
+			ret = sdio_memcpy_toio(func, addr, buf, len);
+	}
+	if (ret)
+		wl1271_error("sdio write failed (%d)", ret);
+
+}
+
+static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
+{
+	struct sdio_func *func = wl_to_func(wl);
+	int ret;
+
+	/* Let the SDIO stack handle wlan_enable control, so we
+	 * keep host claimed while wlan is in use to keep wl1271
+	 * alive.
+	 */
+	if (enable) {
+		/* Power up the card */
+		ret = pm_runtime_get_sync(&func->dev);
+		if (ret < 0)
+			goto out;
+		sdio_claim_host(func);
+		sdio_enable_func(func);
+		sdio_release_host(func);
+	} else {
+		sdio_claim_host(func);
+		sdio_disable_func(func);
+		sdio_release_host(func);
+
+		/* Power down the card */
+		ret = pm_runtime_put_sync(&func->dev);
+	}
+
+out:
+	return ret;
+}
+
+static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
+{
+}
+
+static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
+{
+}
+
+
+static struct wl1271_if_operations sdio_ops = {
+	.read		= wl1271_sdio_raw_read,
+	.write		= wl1271_sdio_raw_write,
+	.power		= wl1271_sdio_set_power,
+	.dev		= wl1271_sdio_wl_to_dev,
+	.enable_irq	= wl1271_sdio_enable_interrupts,
+	.disable_irq	= wl1271_sdio_disable_interrupts,
+};
+
+static void wl1271_fw_wakeup(struct wl1271 *wl)
+{
+	u32 elp_reg;
+
+	elp_reg = ELPCTRL_WAKE_UP;
+	wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
+}
+
+static int wl1271_fetch_firmware(struct wl1271 *wl)
+{
+	const struct firmware *fw;
+	int ret;
+
+	ret = request_firmware(&fw, WL1271_FW_NAME, wl1271_wl_to_dev(wl));
+
+	if (ret < 0) {
+		wl1271_error("could not get firmware: %d", ret);
+		return ret;
+	}
+
+	if (fw->size % 4) {
+		wl1271_error("firmware size is not multiple of 32 bits: %zu",
+				fw->size);
+		ret = -EILSEQ;
+		goto out;
+	}
+
+	wl->fw_len = fw->size;
+	wl->fw = vmalloc(wl->fw_len);
+
+	if (!wl->fw) {
+		wl1271_error("could not allocate memory for the firmware");
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	memcpy(wl->fw, fw->data, wl->fw_len);
+
+	ret = 0;
+
+out:
+	release_firmware(fw);
+
+	return ret;
+}
+
+static int wl1271_fetch_nvs(struct wl1271 *wl)
+{
+	const struct firmware *fw;
+	int ret;
+
+	ret = request_firmware(&fw, WL1271_NVS_NAME, wl1271_wl_to_dev(wl));
+
+	if (ret < 0) {
+		wl1271_error("could not get nvs file: %d", ret);
+		return ret;
+	}
+
+	wl->nvs = kmemdup(fw->data, sizeof(struct wl1271_nvs_file), GFP_KERNEL);
+
+	if (!wl->nvs) {
+		wl1271_error("could not allocate memory for the nvs file");
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	wl->nvs_len = fw->size;
+
+out:
+	release_firmware(fw);
+
+	return ret;
+}
+
+static int wl1271_chip_wakeup(struct wl1271 *wl)
+{
+	struct wl1271_partition_set partition;
+	int ret;
+
+	msleep(WL1271_PRE_POWER_ON_SLEEP);
+	ret = wl1271_power_on(wl);
+	if (ret)
+		return ret;
+
+	msleep(WL1271_POWER_ON_SLEEP);
+
+	/* We don't need a real memory partition here, because we only want
+	 * to use the registers at this point. */
+	memset(&partition, 0, sizeof(partition));
+	partition.reg.start = REGISTERS_BASE;
+	partition.reg.size = REGISTERS_DOWN_SIZE;
+	wl1271_set_partition(wl, &partition);
+
+	/* ELP module wake up */
+	wl1271_fw_wakeup(wl);
+
+	/* whal_FwCtrl_BootSm() */
+
+	/* 0. read chip id from CHIP_ID */
+	wl->chip.id = wl1271_read32(wl, CHIP_ID_B);
+
+	/* 1. check if chip id is valid */
+
+	switch (wl->chip.id) {
+	case CHIP_ID_1271_PG10:
+		wl1271_warning("chip id 0x%x (1271 PG10) support is obsolete",
+				wl->chip.id);
+		break;
+	case CHIP_ID_1271_PG20:
+		wl1271_notice("chip id 0x%x (1271 PG20)",
+				wl->chip.id);
+		break;
+	default:
+		wl1271_warning("unsupported chip id: 0x%x", wl->chip.id);
+		return -ENODEV;
+	}
+
+	return ret;
+}
+
+static struct wl1271_partition_set part_down = {
+	.mem = {
+		.start = 0x00000000,
+		.size  = 0x000177c0
+	},
+	.reg = {
+		.start = REGISTERS_BASE,
+		.size  = 0x00008800
+	},
+	.mem2 = {
+		.start = 0x00000000,
+		.size  = 0x00000000
+	},
+	.mem3 = {
+		.start = 0x00000000,
+		.size  = 0x00000000
+	},
+};
+
+static int tester(void *data)
+{
+	struct wl1271 *wl = data;
+	struct sdio_func *func = wl_to_func(wl);
+	struct device *pdev = &func->dev;
+	int ret = 0;
+	bool rx_started = 0;
+	bool tx_started = 0;
+	uint8_t *tx_buf, *rx_buf;
+	int test_size = PAGE_SIZE;
+	u32 addr = 0;
+	struct wl1271_partition_set partition;
+
+	/* We assume chip is powered up and firmware fetched */
+
+	memcpy(&partition, &part_down, sizeof(partition));
+	partition.mem.start = addr;
+	wl1271_set_partition(wl, &partition);
+
+	tx_buf = kmalloc(test_size, GFP_KERNEL);
+	rx_buf = kmalloc(test_size, GFP_KERNEL);
+	if (!tx_buf || !rx_buf) {
+		dev_err(pdev,
+			"Could not allocate memory. Test will not run.\n");
+		ret = -ENOMEM;
+		goto free;
+	}
+
+	memset(tx_buf, 0x5a, test_size);
+
+	/* write something in data area so we can read it back */
+	wl1271_write(wl, addr, tx_buf, test_size, false);
+
+	while (!kthread_should_stop()) {
+		if (rx && !rx_started) {
+			dev_info(pdev, "starting rx test\n");
+			rx_started = 1;
+		} else if (!rx && rx_started) {
+			dev_info(pdev, "stopping rx test\n");
+			rx_started = 0;
+		}
+
+		if (tx && !tx_started) {
+			dev_info(pdev, "starting tx test\n");
+			tx_started = 1;
+		} else if (!tx && tx_started) {
+			dev_info(pdev, "stopping tx test\n");
+			tx_started = 0;
+		}
+
+		if (rx_started)
+			wl1271_read(wl, addr, rx_buf, test_size, false);
+
+		if (tx_started)
+			wl1271_write(wl, addr, tx_buf, test_size, false);
+
+		if (!rx_started && !tx_started)
+			msleep(100);
+	}
+
+free:
+	kfree(tx_buf);
+	kfree(rx_buf);
+	return ret;
+}
+
+static int __devinit wl1271_probe(struct sdio_func *func,
+		const struct sdio_device_id *id)
+{
+	const struct wl12xx_platform_data *wlan_data;
+	struct wl1271 *wl;
+	struct wl1271_test *wl_test;
+	int ret = 0;
+
+	/* wl1271 has 2 sdio functions we handle just the wlan part */
+	if (func->num != 0x02)
+		return -ENODEV;
+
+	wl_test = kzalloc(sizeof(struct wl1271_test), GFP_KERNEL);
+	if (!wl_test) {
+		dev_err(&func->dev, "Could not allocate memory\n");
+		return -ENOMEM;
+	}
+
+	wl = &wl_test->wl;
+
+	wl->if_priv = func;
+	wl->if_ops = &sdio_ops;
+
+	/* Grab access to FN0 for ELP reg. */
+	func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
+
+	wlan_data = wl12xx_get_platform_data();
+	if (IS_ERR(wlan_data)) {
+		ret = PTR_ERR(wlan_data);
+		dev_err(&func->dev, "missing wlan platform data: %d\n", ret);
+		goto out_free;
+	}
+
+	wl->irq = wlan_data->irq;
+	wl->ref_clock = wlan_data->board_ref_clock;
+
+	sdio_set_drvdata(func, wl_test);
+
+
+	/* power up the device */
+	ret = wl1271_chip_wakeup(wl);
+	if (ret) {
+		dev_err(&func->dev, "could not wake up chip\n");
+		goto out_free;
+	}
+
+	if (wl->fw == NULL) {
+		ret = wl1271_fetch_firmware(wl);
+		if (ret < 0) {
+			dev_err(&func->dev, "firmware fetch error\n");
+			goto out_off;
+		}
+	}
+
+	/* fetch NVS */
+	if (wl->nvs == NULL) {
+		ret = wl1271_fetch_nvs(wl);
+		if (ret < 0) {
+			dev_err(&func->dev, "NVS fetch error\n");
+			goto out_off;
+		}
+	}
+
+	ret = wl1271_load_firmware(wl);
+	if (ret < 0) {
+		dev_err(&func->dev, "firmware load error: %d\n", ret);
+		goto out_free;
+	}
+
+	dev_info(&func->dev, "initialized\n");
+
+	/* I/O testing will be done in the tester thread */
+
+	wl_test->test_task = kthread_run(tester, wl, "sdio_tester");
+	if (IS_ERR(wl_test->test_task)) {
+		dev_err(&func->dev, "unable to create kernel thread\n");
+		ret = PTR_ERR(wl_test->test_task);
+		goto out_free;
+	}
+
+	return 0;
+
+out_off:
+	/* power off the chip */
+	wl1271_power_off(wl);
+
+out_free:
+	kfree(wl_test);
+	return ret;
+}
+
+static void __devexit wl1271_remove(struct sdio_func *func)
+{
+	struct wl1271_test *wl_test = sdio_get_drvdata(func);
+
+	/* stop the I/O test thread */
+	kthread_stop(wl_test->test_task);
+
+	/* power off the chip */
+	wl1271_power_off(&wl_test->wl);
+
+	vfree(wl_test->wl.fw);
+	wl_test->wl.fw = NULL;
+	kfree(wl_test->wl.nvs);
+	wl_test->wl.nvs = NULL;
+
+	kfree(wl_test);
+}
+
+static struct sdio_driver wl1271_sdio_driver = {
+	.name		= "wl12xx_sdio_test",
+	.id_table	= wl1271_devices,
+	.probe		= wl1271_probe,
+	.remove		= __devexit_p(wl1271_remove),
+};
+
+static int __init wl1271_init(void)
+{
+	int ret;
+
+	ret = sdio_register_driver(&wl1271_sdio_driver);
+	if (ret < 0)
+		pr_err("failed to register sdio driver: %d\n", ret);
+
+	return ret;
+}
+module_init(wl1271_init);
+
+static void __exit wl1271_exit(void)
+{
+	sdio_unregister_driver(&wl1271_sdio_driver);
+}
+module_exit(wl1271_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Roger Quadros <roger.quadros@nokia.com>");
+