diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/wl12xx/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/net/wireless/wl12xx/Makefile | 2 | ||||
| -rw-r--r-- | drivers/net/wireless/wl12xx/wl1271_sdio_test.c | 510 |
3 files changed, 520 insertions, 0 deletions
diff --git a/drivers/net/wireless/wl12xx/Kconfig b/drivers/net/wireless/wl12xx/Kconfig index d2adeb1f72b7..085bc44d814b 100644 --- a/drivers/net/wireless/wl12xx/Kconfig +++ b/drivers/net/wireless/wl12xx/Kconfig @@ -52,6 +52,14 @@ config WL12XX_SDIO If you choose to build a module, it'll be called wl12xx_sdio. Say N if unsure. +config WL1271_SDIO_TEST + tristate "TI wl1271 SDIO testing support" + depends on WL1271 && MMC + ---help--- + This module adds support for the SDIO bus testing with the + TI wl1271 chipset. Select this if your platform is using + the SDIO bus. + config WL12XX_PLATFORM_DATA bool depends on WL12XX_SDIO != n || WL1251_SDIO != n diff --git a/drivers/net/wireless/wl12xx/Makefile b/drivers/net/wireless/wl12xx/Makefile index 005a758174d9..187678503887 100644 --- a/drivers/net/wireless/wl12xx/Makefile +++ b/drivers/net/wireless/wl12xx/Makefile @@ -9,5 +9,7 @@ obj-$(CONFIG_WL12XX) += wl12xx.o obj-$(CONFIG_WL12XX_SPI) += wl12xx_spi.o obj-$(CONFIG_WL12XX_SDIO) += wl12xx_sdio.o +obj-$(CONFIG_WL1271_SDIO_TEST) += wl1271_sdio_test.o + # small builtin driver bit obj-$(CONFIG_WL12XX_PLATFORM_DATA) += wl12xx_platform_data.o diff --git a/drivers/net/wireless/wl12xx/wl1271_sdio_test.c b/drivers/net/wireless/wl12xx/wl1271_sdio_test.c new file mode 100644 index 000000000000..42d13144f645 --- /dev/null +++ b/drivers/net/wireless/wl12xx/wl1271_sdio_test.c @@ -0,0 +1,510 @@ +/* + * wl1271_sdio_test.c - SDIO testing driver for wl1271 + * + * Copyright (C) 2010 Nokia Corporation + * + * Contact: Roger Quadros <roger.quadros@nokia.com> + * + * wl1271 read/write routines taken from wl1271_sdio.c + * + * 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 "wl1271.h" +#include "wl1271_io.h" +#include "wl1271_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); + + /* Let the SDIO stack handle wlan_enable control, so we + * keep host claimed while wlan is in use to keep wl1271 + * alive. + */ + if (enable) { + sdio_claim_power(func); + sdio_claim_host(func); + sdio_enable_func(func); + } else { + sdio_disable_func(func); + sdio_release_host(func); + sdio_release_power(func); + } + + return 0; +} + +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 = "wl1271_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>"); + |
