diff options
author | Kalle Valo <kvalo@codeaurora.org> | 2015-11-18 08:49:59 +0100 |
---|---|---|
committer | Kalle Valo <kvalo@codeaurora.org> | 2015-11-18 13:28:31 +0100 |
commit | d3466830c165a298419788b88086ea99974e63ff (patch) | |
tree | 5621c36a3a051495678dc816c888f3fe149ed125 /drivers/net/wireless/p54/p54spi.c | |
parent | hostap: move under intersil vendor directory (diff) | |
download | linux-d3466830c165a298419788b88086ea99974e63ff.tar.xz linux-d3466830c165a298419788b88086ea99974e63ff.zip |
p54: move under intersil vendor directory
Part of reorganising wireless drivers directory and Kconfig.
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/p54/p54spi.c')
-rw-r--r-- | drivers/net/wireless/p54/p54spi.c | 720 |
1 files changed, 0 insertions, 720 deletions
diff --git a/drivers/net/wireless/p54/p54spi.c b/drivers/net/wireless/p54/p54spi.c deleted file mode 100644 index 7ab2f43ab425..000000000000 --- a/drivers/net/wireless/p54/p54spi.c +++ /dev/null @@ -1,720 +0,0 @@ -/* - * Copyright (C) 2008 Christian Lamparter <chunkeey@web.de> - * Copyright 2008 Johannes Berg <johannes@sipsolutions.net> - * - * This driver is a port from stlc45xx: - * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). - * - * 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/module.h> -#include <linux/platform_device.h> -#include <linux/interrupt.h> -#include <linux/firmware.h> -#include <linux/delay.h> -#include <linux/irq.h> -#include <linux/spi/spi.h> -#include <linux/etherdevice.h> -#include <linux/gpio.h> -#include <linux/slab.h> - -#include "p54spi.h" -#include "p54.h" - -#include "lmac.h" - -#ifdef CONFIG_P54_SPI_DEFAULT_EEPROM -#include "p54spi_eeprom.h" -#endif /* CONFIG_P54_SPI_DEFAULT_EEPROM */ - -MODULE_FIRMWARE("3826.arm"); - -/* gpios should be handled in board files and provided via platform data, - * but because it's currently impossible for p54spi to have a header file - * in include/linux, let's use module paramaters for now - */ - -static int p54spi_gpio_power = 97; -module_param(p54spi_gpio_power, int, 0444); -MODULE_PARM_DESC(p54spi_gpio_power, "gpio number for power line"); - -static int p54spi_gpio_irq = 87; -module_param(p54spi_gpio_irq, int, 0444); -MODULE_PARM_DESC(p54spi_gpio_irq, "gpio number for irq line"); - -static void p54spi_spi_read(struct p54s_priv *priv, u8 address, - void *buf, size_t len) -{ - struct spi_transfer t[2]; - struct spi_message m; - __le16 addr; - - /* We first push the address */ - addr = cpu_to_le16(address << 8 | SPI_ADRS_READ_BIT_15); - - spi_message_init(&m); - memset(t, 0, sizeof(t)); - - t[0].tx_buf = &addr; - t[0].len = sizeof(addr); - spi_message_add_tail(&t[0], &m); - - t[1].rx_buf = buf; - t[1].len = len; - spi_message_add_tail(&t[1], &m); - - spi_sync(priv->spi, &m); -} - - -static void p54spi_spi_write(struct p54s_priv *priv, u8 address, - const void *buf, size_t len) -{ - struct spi_transfer t[3]; - struct spi_message m; - __le16 addr; - - /* We first push the address */ - addr = cpu_to_le16(address << 8); - - spi_message_init(&m); - memset(t, 0, sizeof(t)); - - t[0].tx_buf = &addr; - t[0].len = sizeof(addr); - spi_message_add_tail(&t[0], &m); - - t[1].tx_buf = buf; - t[1].len = len & ~1; - spi_message_add_tail(&t[1], &m); - - if (len % 2) { - __le16 last_word; - last_word = cpu_to_le16(((u8 *)buf)[len - 1]); - - t[2].tx_buf = &last_word; - t[2].len = sizeof(last_word); - spi_message_add_tail(&t[2], &m); - } - - spi_sync(priv->spi, &m); -} - -static u32 p54spi_read32(struct p54s_priv *priv, u8 addr) -{ - __le32 val; - - p54spi_spi_read(priv, addr, &val, sizeof(val)); - - return le32_to_cpu(val); -} - -static inline void p54spi_write16(struct p54s_priv *priv, u8 addr, __le16 val) -{ - p54spi_spi_write(priv, addr, &val, sizeof(val)); -} - -static inline void p54spi_write32(struct p54s_priv *priv, u8 addr, __le32 val) -{ - p54spi_spi_write(priv, addr, &val, sizeof(val)); -} - -static int p54spi_wait_bit(struct p54s_priv *priv, u16 reg, u32 bits) -{ - int i; - - for (i = 0; i < 2000; i++) { - u32 buffer = p54spi_read32(priv, reg); - if ((buffer & bits) == bits) - return 1; - } - return 0; -} - -static int p54spi_spi_write_dma(struct p54s_priv *priv, __le32 base, - const void *buf, size_t len) -{ - if (!p54spi_wait_bit(priv, SPI_ADRS_DMA_WRITE_CTRL, HOST_ALLOWED)) { - dev_err(&priv->spi->dev, "spi_write_dma not allowed " - "to DMA write.\n"); - return -EAGAIN; - } - - p54spi_write16(priv, SPI_ADRS_DMA_WRITE_CTRL, - cpu_to_le16(SPI_DMA_WRITE_CTRL_ENABLE)); - - p54spi_write16(priv, SPI_ADRS_DMA_WRITE_LEN, cpu_to_le16(len)); - p54spi_write32(priv, SPI_ADRS_DMA_WRITE_BASE, base); - p54spi_spi_write(priv, SPI_ADRS_DMA_DATA, buf, len); - return 0; -} - -static int p54spi_request_firmware(struct ieee80211_hw *dev) -{ - struct p54s_priv *priv = dev->priv; - int ret; - - /* FIXME: should driver use it's own struct device? */ - ret = request_firmware(&priv->firmware, "3826.arm", &priv->spi->dev); - - if (ret < 0) { - dev_err(&priv->spi->dev, "request_firmware() failed: %d", ret); - return ret; - } - - ret = p54_parse_firmware(dev, priv->firmware); - if (ret) { - release_firmware(priv->firmware); - return ret; - } - - return 0; -} - -static int p54spi_request_eeprom(struct ieee80211_hw *dev) -{ - struct p54s_priv *priv = dev->priv; - const struct firmware *eeprom; - int ret; - - /* allow users to customize their eeprom. - */ - - ret = request_firmware_direct(&eeprom, "3826.eeprom", &priv->spi->dev); - if (ret < 0) { -#ifdef CONFIG_P54_SPI_DEFAULT_EEPROM - dev_info(&priv->spi->dev, "loading default eeprom...\n"); - ret = p54_parse_eeprom(dev, (void *) p54spi_eeprom, - sizeof(p54spi_eeprom)); -#else - dev_err(&priv->spi->dev, "Failed to request user eeprom\n"); -#endif /* CONFIG_P54_SPI_DEFAULT_EEPROM */ - } else { - dev_info(&priv->spi->dev, "loading user eeprom...\n"); - ret = p54_parse_eeprom(dev, (void *) eeprom->data, - (int)eeprom->size); - release_firmware(eeprom); - } - return ret; -} - -static int p54spi_upload_firmware(struct ieee80211_hw *dev) -{ - struct p54s_priv *priv = dev->priv; - unsigned long fw_len, _fw_len; - unsigned int offset = 0; - int err = 0; - u8 *fw; - - fw_len = priv->firmware->size; - fw = kmemdup(priv->firmware->data, fw_len, GFP_KERNEL); - if (!fw) - return -ENOMEM; - - /* stop the device */ - p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16( - SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_HOST_RESET | - SPI_CTRL_STAT_START_HALTED)); - - msleep(TARGET_BOOT_SLEEP); - - p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16( - SPI_CTRL_STAT_HOST_OVERRIDE | - SPI_CTRL_STAT_START_HALTED)); - - msleep(TARGET_BOOT_SLEEP); - - while (fw_len > 0) { - _fw_len = min_t(long, fw_len, SPI_MAX_PACKET_SIZE); - - err = p54spi_spi_write_dma(priv, cpu_to_le32( - ISL38XX_DEV_FIRMWARE_ADDR + offset), - (fw + offset), _fw_len); - if (err < 0) - goto out; - - fw_len -= _fw_len; - offset += _fw_len; - } - - BUG_ON(fw_len != 0); - - /* enable host interrupts */ - p54spi_write32(priv, SPI_ADRS_HOST_INT_EN, - cpu_to_le32(SPI_HOST_INTS_DEFAULT)); - - /* boot the device */ - p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16( - SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_HOST_RESET | - SPI_CTRL_STAT_RAM_BOOT)); - - msleep(TARGET_BOOT_SLEEP); - - p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16( - SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_RAM_BOOT)); - msleep(TARGET_BOOT_SLEEP); - -out: - kfree(fw); - return err; -} - -static void p54spi_power_off(struct p54s_priv *priv) -{ - disable_irq(gpio_to_irq(p54spi_gpio_irq)); - gpio_set_value(p54spi_gpio_power, 0); -} - -static void p54spi_power_on(struct p54s_priv *priv) -{ - gpio_set_value(p54spi_gpio_power, 1); - enable_irq(gpio_to_irq(p54spi_gpio_irq)); - - /* need to wait a while before device can be accessed, the length - * is just a guess - */ - msleep(10); -} - -static inline void p54spi_int_ack(struct p54s_priv *priv, u32 val) -{ - p54spi_write32(priv, SPI_ADRS_HOST_INT_ACK, cpu_to_le32(val)); -} - -static int p54spi_wakeup(struct p54s_priv *priv) -{ - /* wake the chip */ - p54spi_write32(priv, SPI_ADRS_ARM_INTERRUPTS, - cpu_to_le32(SPI_TARGET_INT_WAKEUP)); - - /* And wait for the READY interrupt */ - if (!p54spi_wait_bit(priv, SPI_ADRS_HOST_INTERRUPTS, - SPI_HOST_INT_READY)) { - dev_err(&priv->spi->dev, "INT_READY timeout\n"); - return -EBUSY; - } - - p54spi_int_ack(priv, SPI_HOST_INT_READY); - return 0; -} - -static inline void p54spi_sleep(struct p54s_priv *priv) -{ - p54spi_write32(priv, SPI_ADRS_ARM_INTERRUPTS, - cpu_to_le32(SPI_TARGET_INT_SLEEP)); -} - -static void p54spi_int_ready(struct p54s_priv *priv) -{ - p54spi_write32(priv, SPI_ADRS_HOST_INT_EN, cpu_to_le32( - SPI_HOST_INT_UPDATE | SPI_HOST_INT_SW_UPDATE)); - - switch (priv->fw_state) { - case FW_STATE_BOOTING: - priv->fw_state = FW_STATE_READY; - complete(&priv->fw_comp); - break; - case FW_STATE_RESETTING: - priv->fw_state = FW_STATE_READY; - /* TODO: reinitialize state */ - break; - default: - break; - } -} - -static int p54spi_rx(struct p54s_priv *priv) -{ - struct sk_buff *skb; - u16 len; - u16 rx_head[2]; -#define READAHEAD_SZ (sizeof(rx_head)-sizeof(u16)) - - if (p54spi_wakeup(priv) < 0) - return -EBUSY; - - /* Read data size and first data word in one SPI transaction - * This is workaround for firmware/DMA bug, - * when first data word gets lost under high load. - */ - p54spi_spi_read(priv, SPI_ADRS_DMA_DATA, rx_head, sizeof(rx_head)); - len = rx_head[0]; - - if (len == 0) { - p54spi_sleep(priv); - dev_err(&priv->spi->dev, "rx request of zero bytes\n"); - return 0; - } - - /* Firmware may insert up to 4 padding bytes after the lmac header, - * but it does not amend the size of SPI data transfer. - * Such packets has correct data size in header, thus referencing - * past the end of allocated skb. Reserve extra 4 bytes for this case - */ - skb = dev_alloc_skb(len + 4); - if (!skb) { - p54spi_sleep(priv); - dev_err(&priv->spi->dev, "could not alloc skb"); - return -ENOMEM; - } - - if (len <= READAHEAD_SZ) { - memcpy(skb_put(skb, len), rx_head + 1, len); - } else { - memcpy(skb_put(skb, READAHEAD_SZ), rx_head + 1, READAHEAD_SZ); - p54spi_spi_read(priv, SPI_ADRS_DMA_DATA, - skb_put(skb, len - READAHEAD_SZ), - len - READAHEAD_SZ); - } - p54spi_sleep(priv); - /* Put additional bytes to compensate for the possible - * alignment-caused truncation - */ - skb_put(skb, 4); - - if (p54_rx(priv->hw, skb) == 0) - dev_kfree_skb(skb); - - return 0; -} - - -static irqreturn_t p54spi_interrupt(int irq, void *config) -{ - struct spi_device *spi = config; - struct p54s_priv *priv = spi_get_drvdata(spi); - - ieee80211_queue_work(priv->hw, &priv->work); - - return IRQ_HANDLED; -} - -static int p54spi_tx_frame(struct p54s_priv *priv, struct sk_buff *skb) -{ - struct p54_hdr *hdr = (struct p54_hdr *) skb->data; - int ret = 0; - - if (p54spi_wakeup(priv) < 0) - return -EBUSY; - - ret = p54spi_spi_write_dma(priv, hdr->req_id, skb->data, skb->len); - if (ret < 0) - goto out; - - if (!p54spi_wait_bit(priv, SPI_ADRS_HOST_INTERRUPTS, - SPI_HOST_INT_WR_READY)) { - dev_err(&priv->spi->dev, "WR_READY timeout\n"); - ret = -EAGAIN; - goto out; - } - - p54spi_int_ack(priv, SPI_HOST_INT_WR_READY); - - if (FREE_AFTER_TX(skb)) - p54_free_skb(priv->hw, skb); -out: - p54spi_sleep(priv); - return ret; -} - -static int p54spi_wq_tx(struct p54s_priv *priv) -{ - struct p54s_tx_info *entry; - struct sk_buff *skb; - struct ieee80211_tx_info *info; - struct p54_tx_info *minfo; - struct p54s_tx_info *dinfo; - unsigned long flags; - int ret = 0; - - spin_lock_irqsave(&priv->tx_lock, flags); - - while (!list_empty(&priv->tx_pending)) { - entry = list_entry(priv->tx_pending.next, - struct p54s_tx_info, tx_list); - - list_del_init(&entry->tx_list); - - spin_unlock_irqrestore(&priv->tx_lock, flags); - - dinfo = container_of((void *) entry, struct p54s_tx_info, - tx_list); - minfo = container_of((void *) dinfo, struct p54_tx_info, - data); - info = container_of((void *) minfo, struct ieee80211_tx_info, - rate_driver_data); - skb = container_of((void *) info, struct sk_buff, cb); - - ret = p54spi_tx_frame(priv, skb); - - if (ret < 0) { - p54_free_skb(priv->hw, skb); - return ret; - } - - spin_lock_irqsave(&priv->tx_lock, flags); - } - spin_unlock_irqrestore(&priv->tx_lock, flags); - return ret; -} - -static void p54spi_op_tx(struct ieee80211_hw *dev, struct sk_buff *skb) -{ - struct p54s_priv *priv = dev->priv; - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - struct p54_tx_info *mi = (struct p54_tx_info *) info->rate_driver_data; - struct p54s_tx_info *di = (struct p54s_tx_info *) mi->data; - unsigned long flags; - - BUILD_BUG_ON(sizeof(*di) > sizeof((mi->data))); - - spin_lock_irqsave(&priv->tx_lock, flags); - list_add_tail(&di->tx_list, &priv->tx_pending); - spin_unlock_irqrestore(&priv->tx_lock, flags); - - ieee80211_queue_work(priv->hw, &priv->work); -} - -static void p54spi_work(struct work_struct *work) -{ - struct p54s_priv *priv = container_of(work, struct p54s_priv, work); - u32 ints; - int ret; - - mutex_lock(&priv->mutex); - - if (priv->fw_state == FW_STATE_OFF) - goto out; - - ints = p54spi_read32(priv, SPI_ADRS_HOST_INTERRUPTS); - - if (ints & SPI_HOST_INT_READY) { - p54spi_int_ready(priv); - p54spi_int_ack(priv, SPI_HOST_INT_READY); - } - - if (priv->fw_state != FW_STATE_READY) - goto out; - - if (ints & SPI_HOST_INT_UPDATE) { - p54spi_int_ack(priv, SPI_HOST_INT_UPDATE); - ret = p54spi_rx(priv); - if (ret < 0) - goto out; - } - if (ints & SPI_HOST_INT_SW_UPDATE) { - p54spi_int_ack(priv, SPI_HOST_INT_SW_UPDATE); - ret = p54spi_rx(priv); - if (ret < 0) - goto out; - } - - ret = p54spi_wq_tx(priv); -out: - mutex_unlock(&priv->mutex); -} - -static int p54spi_op_start(struct ieee80211_hw *dev) -{ - struct p54s_priv *priv = dev->priv; - unsigned long timeout; - int ret = 0; - - if (mutex_lock_interruptible(&priv->mutex)) { - ret = -EINTR; - goto out; - } - - priv->fw_state = FW_STATE_BOOTING; - - p54spi_power_on(priv); - - ret = p54spi_upload_firmware(dev); - if (ret < 0) { - p54spi_power_off(priv); - goto out_unlock; - } - - mutex_unlock(&priv->mutex); - - timeout = msecs_to_jiffies(2000); - timeout = wait_for_completion_interruptible_timeout(&priv->fw_comp, - timeout); - if (!timeout) { - dev_err(&priv->spi->dev, "firmware boot failed"); - p54spi_power_off(priv); - ret = -1; - goto out; - } - - if (mutex_lock_interruptible(&priv->mutex)) { - ret = -EINTR; - p54spi_power_off(priv); - goto out; - } - - WARN_ON(priv->fw_state != FW_STATE_READY); - -out_unlock: - mutex_unlock(&priv->mutex); - -out: - return ret; -} - -static void p54spi_op_stop(struct ieee80211_hw *dev) -{ - struct p54s_priv *priv = dev->priv; - unsigned long flags; - - mutex_lock(&priv->mutex); - WARN_ON(priv->fw_state != FW_STATE_READY); - - p54spi_power_off(priv); - spin_lock_irqsave(&priv->tx_lock, flags); - INIT_LIST_HEAD(&priv->tx_pending); - spin_unlock_irqrestore(&priv->tx_lock, flags); - - priv->fw_state = FW_STATE_OFF; - mutex_unlock(&priv->mutex); - - cancel_work_sync(&priv->work); -} - -static int p54spi_probe(struct spi_device *spi) -{ - struct p54s_priv *priv = NULL; - struct ieee80211_hw *hw; - int ret = -EINVAL; - - hw = p54_init_common(sizeof(*priv)); - if (!hw) { - dev_err(&spi->dev, "could not alloc ieee80211_hw"); - return -ENOMEM; - } - - priv = hw->priv; - priv->hw = hw; - spi_set_drvdata(spi, priv); - priv->spi = spi; - - spi->bits_per_word = 16; - spi->max_speed_hz = 24000000; - - ret = spi_setup(spi); - if (ret < 0) { - dev_err(&priv->spi->dev, "spi_setup failed"); - goto err_free; - } - - ret = gpio_request(p54spi_gpio_power, "p54spi power"); - if (ret < 0) { - dev_err(&priv->spi->dev, "power GPIO request failed: %d", ret); - goto err_free; - } - - ret = gpio_request(p54spi_gpio_irq, "p54spi irq"); - if (ret < 0) { - dev_err(&priv->spi->dev, "irq GPIO request failed: %d", ret); - goto err_free_gpio_power; - } - - gpio_direction_output(p54spi_gpio_power, 0); - gpio_direction_input(p54spi_gpio_irq); - - ret = request_irq(gpio_to_irq(p54spi_gpio_irq), - p54spi_interrupt, 0, "p54spi", - priv->spi); - if (ret < 0) { - dev_err(&priv->spi->dev, "request_irq() failed"); - goto err_free_gpio_irq; - } - - irq_set_irq_type(gpio_to_irq(p54spi_gpio_irq), IRQ_TYPE_EDGE_RISING); - - disable_irq(gpio_to_irq(p54spi_gpio_irq)); - - INIT_WORK(&priv->work, p54spi_work); - init_completion(&priv->fw_comp); - INIT_LIST_HEAD(&priv->tx_pending); - mutex_init(&priv->mutex); - spin_lock_init(&priv->tx_lock); - SET_IEEE80211_DEV(hw, &spi->dev); - priv->common.open = p54spi_op_start; - priv->common.stop = p54spi_op_stop; - priv->common.tx = p54spi_op_tx; - - ret = p54spi_request_firmware(hw); - if (ret < 0) - goto err_free_common; - - ret = p54spi_request_eeprom(hw); - if (ret) - goto err_free_common; - - ret = p54_register_common(hw, &priv->spi->dev); - if (ret) - goto err_free_common; - - return 0; - -err_free_common: - free_irq(gpio_to_irq(p54spi_gpio_irq), spi); -err_free_gpio_irq: - gpio_free(p54spi_gpio_irq); -err_free_gpio_power: - gpio_free(p54spi_gpio_power); -err_free: - p54_free_common(priv->hw); - return ret; -} - -static int p54spi_remove(struct spi_device *spi) -{ - struct p54s_priv *priv = spi_get_drvdata(spi); - - p54_unregister_common(priv->hw); - - free_irq(gpio_to_irq(p54spi_gpio_irq), spi); - - gpio_free(p54spi_gpio_power); - gpio_free(p54spi_gpio_irq); - release_firmware(priv->firmware); - - mutex_destroy(&priv->mutex); - - p54_free_common(priv->hw); - - return 0; -} - - -static struct spi_driver p54spi_driver = { - .driver = { - .name = "p54spi", - }, - - .probe = p54spi_probe, - .remove = p54spi_remove, -}; - -module_spi_driver(p54spi_driver); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Christian Lamparter <chunkeey@web.de>"); -MODULE_ALIAS("spi:cx3110x"); -MODULE_ALIAS("spi:p54spi"); -MODULE_ALIAS("spi:stlc45xx"); |