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path: root/drivers/net/wireless/wl12xx/spi.c
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Diffstat (limited to 'drivers/net/wireless/wl12xx/spi.c')
-rw-r--r--drivers/net/wireless/wl12xx/spi.c498
1 files changed, 0 insertions, 498 deletions
diff --git a/drivers/net/wireless/wl12xx/spi.c b/drivers/net/wireless/wl12xx/spi.c
deleted file mode 100644
index 46714910f98..00000000000
--- a/drivers/net/wireless/wl12xx/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 "wl12xx.h"
-#include "wl12xx_80211.h"
-#include "io.h"
-
-#include "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");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 08:15:16 +0000