diff options
Diffstat (limited to 'drivers/net/wireless/wl12xx/wl1251_spi.c')
| -rw-r--r-- | drivers/net/wireless/wl12xx/wl1251_spi.c | 347 |
1 files changed, 0 insertions, 347 deletions
diff --git a/drivers/net/wireless/wl12xx/wl1251_spi.c b/drivers/net/wireless/wl12xx/wl1251_spi.c deleted file mode 100644 index e81474203a23..000000000000 --- a/drivers/net/wireless/wl12xx/wl1251_spi.c +++ /dev/null @@ -1,347 +0,0 @@ -/* - * This file is part of wl1251 - * - * Copyright (C) 2008 Nokia Corporation - * - * Contact: Kalle Valo <kalle.valo@nokia.com> - * - * 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/slab.h> -#include <linux/crc7.h> -#include <linux/spi/spi.h> -#include <linux/spi/wl12xx.h> - -#include "wl1251.h" -#include "wl1251_reg.h" -#include "wl1251_spi.h" - -static irqreturn_t wl1251_irq(int irq, void *cookie) -{ - struct wl1251 *wl; - - wl1251_debug(DEBUG_IRQ, "IRQ"); - - wl = cookie; - - ieee80211_queue_work(wl->hw, &wl->irq_work); - - return IRQ_HANDLED; -} - -static struct spi_device *wl_to_spi(struct wl1251 *wl) -{ - return wl->if_priv; -} - -static void wl1251_spi_reset(struct wl1251 *wl) -{ - u8 *cmd; - struct spi_transfer t; - struct spi_message m; - - cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL); - if (!cmd) { - wl1251_error("could not allocate cmd for spi reset"); - return; - } - - memset(&t, 0, sizeof(t)); - spi_message_init(&m); - - memset(cmd, 0xff, WSPI_INIT_CMD_LEN); - - t.tx_buf = cmd; - t.len = WSPI_INIT_CMD_LEN; - spi_message_add_tail(&t, &m); - - spi_sync(wl_to_spi(wl), &m); - - wl1251_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN); -} - -static void wl1251_spi_wake(struct wl1251 *wl) -{ - u8 crc[WSPI_INIT_CMD_CRC_LEN], *cmd; - struct spi_transfer t; - struct spi_message m; - - cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL); - if (!cmd) { - wl1251_error("could not allocate cmd for spi init"); - return; - } - - memset(crc, 0, sizeof(crc)); - memset(&t, 0, sizeof(t)); - spi_message_init(&m); - - /* - * Set WSPI_INIT_COMMAND - * the data is being send from the MSB to LSB - */ - cmd[2] = 0xff; - cmd[3] = 0xff; - cmd[1] = WSPI_INIT_CMD_START | WSPI_INIT_CMD_TX; - cmd[0] = 0; - cmd[7] = 0; - cmd[6] |= HW_ACCESS_WSPI_INIT_CMD_MASK << 3; - cmd[6] |= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN; - - if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0) - cmd[5] |= WSPI_INIT_CMD_DIS_FIXEDBUSY; - else - cmd[5] |= WSPI_INIT_CMD_EN_FIXEDBUSY; - - cmd[5] |= WSPI_INIT_CMD_IOD | WSPI_INIT_CMD_IP | WSPI_INIT_CMD_CS - | WSPI_INIT_CMD_WSPI | WSPI_INIT_CMD_WS; - - crc[0] = cmd[1]; - crc[1] = cmd[0]; - crc[2] = cmd[7]; - crc[3] = cmd[6]; - crc[4] = cmd[5]; - - cmd[4] |= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1; - cmd[4] |= WSPI_INIT_CMD_END; - - t.tx_buf = cmd; - t.len = WSPI_INIT_CMD_LEN; - spi_message_add_tail(&t, &m); - - spi_sync(wl_to_spi(wl), &m); - - wl1251_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN); -} - -static void wl1251_spi_reset_wake(struct wl1251 *wl) -{ - wl1251_spi_reset(wl); - wl1251_spi_wake(wl); -} - -static void wl1251_spi_read(struct wl1251 *wl, int addr, void *buf, - size_t len) -{ - struct spi_transfer t[3]; - struct spi_message m; - u8 *busy_buf; - u32 *cmd; - - cmd = &wl->buffer_cmd; - busy_buf = wl->buffer_busyword; - - *cmd = 0; - *cmd |= WSPI_CMD_READ; - *cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH; - *cmd |= addr & WSPI_CMD_BYTE_ADDR; - - spi_message_init(&m); - memset(t, 0, sizeof(t)); - - t[0].tx_buf = cmd; - t[0].len = 4; - spi_message_add_tail(&t[0], &m); - - /* Busy and non busy words read */ - t[1].rx_buf = busy_buf; - t[1].len = WL1251_BUSY_WORD_LEN; - spi_message_add_tail(&t[1], &m); - - t[2].rx_buf = buf; - t[2].len = len; - spi_message_add_tail(&t[2], &m); - - spi_sync(wl_to_spi(wl), &m); - - /* FIXME: check busy words */ - - wl1251_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd)); - wl1251_dump(DEBUG_SPI, "spi_read buf <- ", buf, len); -} - -static void wl1251_spi_write(struct wl1251 *wl, int addr, void *buf, - size_t len) -{ - struct spi_transfer t[2]; - struct spi_message m; - u32 *cmd; - - cmd = &wl->buffer_cmd; - - *cmd = 0; - *cmd |= WSPI_CMD_WRITE; - *cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH; - *cmd |= addr & WSPI_CMD_BYTE_ADDR; - - spi_message_init(&m); - memset(t, 0, sizeof(t)); - - t[0].tx_buf = cmd; - t[0].len = sizeof(*cmd); - spi_message_add_tail(&t[0], &m); - - t[1].tx_buf = buf; - t[1].len = len; - spi_message_add_tail(&t[1], &m); - - spi_sync(wl_to_spi(wl), &m); - - wl1251_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd)); - wl1251_dump(DEBUG_SPI, "spi_write buf -> ", buf, len); -} - -static void wl1251_spi_enable_irq(struct wl1251 *wl) -{ - return enable_irq(wl->irq); -} - -static void wl1251_spi_disable_irq(struct wl1251 *wl) -{ - return disable_irq(wl->irq); -} - -static const struct wl1251_if_operations wl1251_spi_ops = { - .read = wl1251_spi_read, - .write = wl1251_spi_write, - .reset = wl1251_spi_reset_wake, - .enable_irq = wl1251_spi_enable_irq, - .disable_irq = wl1251_spi_disable_irq, -}; - -static int __devinit wl1251_spi_probe(struct spi_device *spi) -{ - struct wl12xx_platform_data *pdata; - struct ieee80211_hw *hw; - struct wl1251 *wl; - int ret; - - pdata = spi->dev.platform_data; - if (!pdata) { - wl1251_error("no platform data"); - return -ENODEV; - } - - hw = wl1251_alloc_hw(); - if (IS_ERR(hw)) - return PTR_ERR(hw); - - wl = hw->priv; - - SET_IEEE80211_DEV(hw, &spi->dev); - dev_set_drvdata(&spi->dev, wl); - wl->if_priv = spi; - wl->if_ops = &wl1251_spi_ops; - - /* This is the only SPI value that we need to set here, the rest - * comes from the board-peripherals file */ - spi->bits_per_word = 32; - - ret = spi_setup(spi); - if (ret < 0) { - wl1251_error("spi_setup failed"); - goto out_free; - } - - wl->set_power = pdata->set_power; - if (!wl->set_power) { - wl1251_error("set power function missing in platform data"); - return -ENODEV; - } - - wl->irq = spi->irq; - if (wl->irq < 0) { - wl1251_error("irq missing in platform data"); - return -ENODEV; - } - - wl->use_eeprom = pdata->use_eeprom; - - ret = request_irq(wl->irq, wl1251_irq, 0, DRIVER_NAME, wl); - if (ret < 0) { - wl1251_error("request_irq() failed: %d", ret); - goto out_free; - } - - set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING); - - disable_irq(wl->irq); - - ret = wl1251_init_ieee80211(wl); - if (ret) - goto out_irq; - - return 0; - - out_irq: - free_irq(wl->irq, wl); - - out_free: - ieee80211_free_hw(hw); - - return ret; -} - -static int __devexit wl1251_spi_remove(struct spi_device *spi) -{ - struct wl1251 *wl = dev_get_drvdata(&spi->dev); - - free_irq(wl->irq, wl); - wl1251_free_hw(wl); - - return 0; -} - -static struct spi_driver wl1251_spi_driver = { - .driver = { - .name = DRIVER_NAME, - .bus = &spi_bus_type, - .owner = THIS_MODULE, - }, - - .probe = wl1251_spi_probe, - .remove = __devexit_p(wl1251_spi_remove), -}; - -static int __init wl1251_spi_init(void) -{ - int ret; - - ret = spi_register_driver(&wl1251_spi_driver); - if (ret < 0) { - wl1251_error("failed to register spi driver: %d", ret); - goto out; - } - -out: - return ret; -} - -static void __exit wl1251_spi_exit(void) -{ - spi_unregister_driver(&wl1251_spi_driver); - - wl1251_notice("unloaded"); -} - -module_init(wl1251_spi_init); -module_exit(wl1251_spi_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>"); |