diff options
Diffstat (limited to 'drivers/net/wireless/wl12xx/wl1271_spi.c')
-rw-r--r-- | drivers/net/wireless/wl12xx/wl1271_spi.c | 498 |
1 files changed, 0 insertions, 498 deletions
diff --git a/drivers/net/wireless/wl12xx/wl1271_spi.c b/drivers/net/wireless/wl12xx/wl1271_spi.c deleted file mode 100644 index ef801680773f..000000000000 --- a/drivers/net/wireless/wl12xx/wl1271_spi.c +++ /dev/null @@ -1,498 +0,0 @@ -/* - * This file is part of wl1271 - * - * Copyright (C) 2008-2009 Nokia Corporation - * - * Contact: Luciano Coelho <luciano.coelho@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/crc7.h> -#include <linux/spi/spi.h> -#include <linux/wl12xx.h> -#include <linux/slab.h> - -#include "wl1271.h" -#include "wl12xx_80211.h" -#include "wl1271_io.h" - -#include "wl1271_reg.h" - -#define WSPI_CMD_READ 0x40000000 -#define WSPI_CMD_WRITE 0x00000000 -#define WSPI_CMD_FIXED 0x20000000 -#define WSPI_CMD_BYTE_LENGTH 0x1FFE0000 -#define WSPI_CMD_BYTE_LENGTH_OFFSET 17 -#define WSPI_CMD_BYTE_ADDR 0x0001FFFF - -#define WSPI_INIT_CMD_CRC_LEN 5 - -#define WSPI_INIT_CMD_START 0x00 -#define WSPI_INIT_CMD_TX 0x40 -/* the extra bypass bit is sampled by the TNET as '1' */ -#define WSPI_INIT_CMD_BYPASS_BIT 0x80 -#define WSPI_INIT_CMD_FIXEDBUSY_LEN 0x07 -#define WSPI_INIT_CMD_EN_FIXEDBUSY 0x80 -#define WSPI_INIT_CMD_DIS_FIXEDBUSY 0x00 -#define WSPI_INIT_CMD_IOD 0x40 -#define WSPI_INIT_CMD_IP 0x20 -#define WSPI_INIT_CMD_CS 0x10 -#define WSPI_INIT_CMD_WS 0x08 -#define WSPI_INIT_CMD_WSPI 0x01 -#define WSPI_INIT_CMD_END 0x01 - -#define WSPI_INIT_CMD_LEN 8 - -#define HW_ACCESS_WSPI_FIXED_BUSY_LEN \ - ((WL1271_BUSY_WORD_LEN - 4) / sizeof(u32)) -#define HW_ACCESS_WSPI_INIT_CMD_MASK 0 - -/* HW limitation: maximum possible chunk size is 4095 bytes */ -#define WSPI_MAX_CHUNK_SIZE 4092 - -#define WSPI_MAX_NUM_OF_CHUNKS (WL1271_AGGR_BUFFER_SIZE / WSPI_MAX_CHUNK_SIZE) - -static inline struct spi_device *wl_to_spi(struct wl1271 *wl) -{ - return wl->if_priv; -} - -static struct device *wl1271_spi_wl_to_dev(struct wl1271 *wl) -{ - return &(wl_to_spi(wl)->dev); -} - -static void wl1271_spi_disable_interrupts(struct wl1271 *wl) -{ - disable_irq(wl->irq); -} - -static void wl1271_spi_enable_interrupts(struct wl1271 *wl) -{ - enable_irq(wl->irq); -} - -static void wl1271_spi_reset(struct wl1271 *wl) -{ - u8 *cmd; - struct spi_transfer t; - struct spi_message m; - - cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL); - if (!cmd) { - wl1271_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); - kfree(cmd); - - wl1271_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN); -} - -static void wl1271_spi_init(struct wl1271 *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) { - wl1271_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); - wl1271_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN); - kfree(cmd); -} - -#define WL1271_BUSY_WORD_TIMEOUT 1000 - -static int wl1271_spi_read_busy(struct wl1271 *wl) -{ - struct spi_transfer t[1]; - struct spi_message m; - u32 *busy_buf; - int num_busy_bytes = 0; - - /* - * Read further busy words from SPI until a non-busy word is - * encountered, then read the data itself into the buffer. - */ - - num_busy_bytes = WL1271_BUSY_WORD_TIMEOUT; - busy_buf = wl->buffer_busyword; - while (num_busy_bytes) { - num_busy_bytes--; - spi_message_init(&m); - memset(t, 0, sizeof(t)); - t[0].rx_buf = busy_buf; - t[0].len = sizeof(u32); - t[0].cs_change = true; - spi_message_add_tail(&t[0], &m); - spi_sync(wl_to_spi(wl), &m); - - if (*busy_buf & 0x1) - return 0; - } - - /* The SPI bus is unresponsive, the read failed. */ - wl1271_error("SPI read busy-word timeout!\n"); - return -ETIMEDOUT; -} - -static void wl1271_spi_raw_read(struct wl1271 *wl, int addr, void *buf, - size_t len, bool fixed) -{ - struct spi_transfer t[2]; - struct spi_message m; - u32 *busy_buf; - u32 *cmd; - u32 chunk_len; - - while (len > 0) { - chunk_len = min((size_t)WSPI_MAX_CHUNK_SIZE, len); - - cmd = &wl->buffer_cmd; - busy_buf = wl->buffer_busyword; - - *cmd = 0; - *cmd |= WSPI_CMD_READ; - *cmd |= (chunk_len << WSPI_CMD_BYTE_LENGTH_OFFSET) & - WSPI_CMD_BYTE_LENGTH; - *cmd |= addr & WSPI_CMD_BYTE_ADDR; - - if (fixed) - *cmd |= WSPI_CMD_FIXED; - - spi_message_init(&m); - memset(t, 0, sizeof(t)); - - t[0].tx_buf = cmd; - t[0].len = 4; - t[0].cs_change = true; - spi_message_add_tail(&t[0], &m); - - /* Busy and non busy words read */ - t[1].rx_buf = busy_buf; - t[1].len = WL1271_BUSY_WORD_LEN; - t[1].cs_change = true; - spi_message_add_tail(&t[1], &m); - - spi_sync(wl_to_spi(wl), &m); - - if (!(busy_buf[WL1271_BUSY_WORD_CNT - 1] & 0x1) && - wl1271_spi_read_busy(wl)) { - memset(buf, 0, chunk_len); - return; - } - - spi_message_init(&m); - memset(t, 0, sizeof(t)); - - t[0].rx_buf = buf; - t[0].len = chunk_len; - t[0].cs_change = true; - spi_message_add_tail(&t[0], &m); - - spi_sync(wl_to_spi(wl), &m); - - wl1271_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd)); - wl1271_dump(DEBUG_SPI, "spi_read buf <- ", buf, chunk_len); - - if (!fixed) - addr += chunk_len; - buf += chunk_len; - len -= chunk_len; - } -} - -static void wl1271_spi_raw_write(struct wl1271 *wl, int addr, void *buf, - size_t len, bool fixed) -{ - struct spi_transfer t[2 * WSPI_MAX_NUM_OF_CHUNKS]; - struct spi_message m; - u32 commands[WSPI_MAX_NUM_OF_CHUNKS]; - u32 *cmd; - u32 chunk_len; - int i; - - WARN_ON(len > WL1271_AGGR_BUFFER_SIZE); - - spi_message_init(&m); - memset(t, 0, sizeof(t)); - - cmd = &commands[0]; - i = 0; - while (len > 0) { - chunk_len = min((size_t)WSPI_MAX_CHUNK_SIZE, len); - - *cmd = 0; - *cmd |= WSPI_CMD_WRITE; - *cmd |= (chunk_len << WSPI_CMD_BYTE_LENGTH_OFFSET) & - WSPI_CMD_BYTE_LENGTH; - *cmd |= addr & WSPI_CMD_BYTE_ADDR; - - if (fixed) - *cmd |= WSPI_CMD_FIXED; - - t[i].tx_buf = cmd; - t[i].len = sizeof(*cmd); - spi_message_add_tail(&t[i++], &m); - - t[i].tx_buf = buf; - t[i].len = chunk_len; - spi_message_add_tail(&t[i++], &m); - - wl1271_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd)); - wl1271_dump(DEBUG_SPI, "spi_write buf -> ", buf, chunk_len); - - if (!fixed) - addr += chunk_len; - buf += chunk_len; - len -= chunk_len; - cmd++; - } - - spi_sync(wl_to_spi(wl), &m); -} - -static irqreturn_t wl1271_irq(int irq, void *cookie) -{ - struct wl1271 *wl; - unsigned long flags; - - wl1271_debug(DEBUG_IRQ, "IRQ"); - - wl = cookie; - - /* complete the ELP completion */ - spin_lock_irqsave(&wl->wl_lock, flags); - if (wl->elp_compl) { - complete(wl->elp_compl); - wl->elp_compl = NULL; - } - - if (!test_and_set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags)) - ieee80211_queue_work(wl->hw, &wl->irq_work); - set_bit(WL1271_FLAG_IRQ_PENDING, &wl->flags); - spin_unlock_irqrestore(&wl->wl_lock, flags); - - return IRQ_HANDLED; -} - -static int wl1271_spi_set_power(struct wl1271 *wl, bool enable) -{ - if (wl->set_power) - wl->set_power(enable); - - return 0; -} - -static struct wl1271_if_operations spi_ops = { - .read = wl1271_spi_raw_read, - .write = wl1271_spi_raw_write, - .reset = wl1271_spi_reset, - .init = wl1271_spi_init, - .power = wl1271_spi_set_power, - .dev = wl1271_spi_wl_to_dev, - .enable_irq = wl1271_spi_enable_interrupts, - .disable_irq = wl1271_spi_disable_interrupts -}; - -static int __devinit wl1271_probe(struct spi_device *spi) -{ - struct wl12xx_platform_data *pdata; - struct ieee80211_hw *hw; - struct wl1271 *wl; - int ret; - - pdata = spi->dev.platform_data; - if (!pdata) { - wl1271_error("no platform data"); - return -ENODEV; - } - - hw = wl1271_alloc_hw(); - if (IS_ERR(hw)) - return PTR_ERR(hw); - - wl = hw->priv; - - dev_set_drvdata(&spi->dev, wl); - wl->if_priv = spi; - - wl->if_ops = &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) { - wl1271_error("spi_setup failed"); - goto out_free; - } - - wl->set_power = pdata->set_power; - if (!wl->set_power) { - wl1271_error("set power function missing in platform data"); - ret = -ENODEV; - goto out_free; - } - - wl->ref_clock = pdata->board_ref_clock; - - wl->irq = spi->irq; - if (wl->irq < 0) { - wl1271_error("irq missing in platform data"); - ret = -ENODEV; - goto out_free; - } - - ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl); - if (ret < 0) { - wl1271_error("request_irq() failed: %d", ret); - goto out_free; - } - - set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING); - - disable_irq(wl->irq); - - ret = wl1271_init_ieee80211(wl); - if (ret) - goto out_irq; - - ret = wl1271_register_hw(wl); - if (ret) - goto out_irq; - - wl1271_notice("initialized"); - - return 0; - - out_irq: - free_irq(wl->irq, wl); - - out_free: - wl1271_free_hw(wl); - - return ret; -} - -static int __devexit wl1271_remove(struct spi_device *spi) -{ - struct wl1271 *wl = dev_get_drvdata(&spi->dev); - - wl1271_unregister_hw(wl); - free_irq(wl->irq, wl); - wl1271_free_hw(wl); - - return 0; -} - - -static struct spi_driver wl1271_spi_driver = { - .driver = { - .name = "wl1271_spi", - .bus = &spi_bus_type, - .owner = THIS_MODULE, - }, - - .probe = wl1271_probe, - .remove = __devexit_p(wl1271_remove), -}; - -static int __init wl1271_init(void) -{ - int ret; - - ret = spi_register_driver(&wl1271_spi_driver); - if (ret < 0) { - wl1271_error("failed to register spi driver: %d", ret); - goto out; - } - -out: - return ret; -} - -static void __exit wl1271_exit(void) -{ - spi_unregister_driver(&wl1271_spi_driver); - - wl1271_notice("unloaded"); -} - -module_init(wl1271_init); -module_exit(wl1271_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>"); -MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>"); -MODULE_FIRMWARE(WL1271_FW_NAME); -MODULE_ALIAS("spi:wl1271"); |