mirror of
https://github.com/edk2-porting/linux-next.git
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p54spi: p54spi driver
This patch adds the p54spi driver. Signed-off-by: Christian Lamparter <chunkeey@web.de> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter
John W. Linville
parent
4628ae7558
commit
cd8d3d3212
@ -61,3 +61,13 @@ config P54_PCI
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http://prism54.org/
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If you choose to build a module, it'll be called p54pci.
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config P54_SPI
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tristate "Prism54 SPI (stlc45xx) support"
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depends on P54_COMMON && SPI_MASTER
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---help---
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This driver is for stlc4550 or stlc4560 based wireless chips.
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This driver is experimental, untested and will probably only work on
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Nokia's N800/N810 Portable Internet Tablet.
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If you choose to build a module, it'll be called p54spi.
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@ -1,3 +1,4 @@
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obj-$(CONFIG_P54_COMMON) += p54common.o
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obj-$(CONFIG_P54_USB) += p54usb.o
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obj-$(CONFIG_P54_PCI) += p54pci.o
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obj-$(CONFIG_P54_SPI) += p54spi.o
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@ -104,6 +104,14 @@ struct p54_cal_database {
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#define FW_LM87 0x4c4d3837
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#define FW_LM20 0x4c4d3230
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enum fw_state {
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FW_STATE_OFF,
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FW_STATE_BOOTING,
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FW_STATE_READY,
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FW_STATE_RESET,
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FW_STATE_RESETTING,
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};
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struct p54_common {
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struct ieee80211_hw *hw;
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u32 rx_start;
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@ -154,6 +162,7 @@ struct p54_common {
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int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb);
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void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb);
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int p54_parse_firmware(struct ieee80211_hw *dev, const struct firmware *fw);
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int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len);
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int p54_read_eeprom(struct ieee80211_hw *dev);
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struct ieee80211_hw *p54_init_common(size_t priv_data_len);
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void p54_free_common(struct ieee80211_hw *dev);
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@ -483,7 +483,7 @@ static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
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return dst;
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}
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static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
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int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
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{
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struct p54_common *priv = dev->priv;
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struct eeprom_pda_wrap *wrap = NULL;
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@ -698,6 +698,7 @@ static int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
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wiphy_name(dev->wiphy));
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return err;
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}
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EXPORT_SYMBOL_GPL(p54_parse_eeprom);
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static int p54_rssi_to_dbm(struct ieee80211_hw *dev, int rssi)
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{
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759
drivers/net/wireless/p54/p54spi.c
Normal file
759
drivers/net/wireless/p54/p54spi.c
Normal file
@ -0,0 +1,759 @@
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/*
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* Copyright (C) 2008 Christian Lamparter <chunkeey@web.de>
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* Copyright 2008 Johannes Berg <johannes@sipsolutions.net>
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*
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* This driver is a port from stlc45xx:
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* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/interrupt.h>
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#include <linux/firmware.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/spi/spi.h>
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#include <linux/etherdevice.h>
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#include <linux/gpio.h>
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#include "p54spi.h"
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#include "p54spi_eeprom.h"
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#include "p54.h"
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#include "p54common.h"
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MODULE_FIRMWARE("3826.arm");
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MODULE_ALIAS("stlc45xx");
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static void p54spi_spi_read(struct p54s_priv *priv, u8 address,
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void *buf, size_t len)
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{
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struct spi_transfer t[2];
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struct spi_message m;
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__le16 addr;
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/* We first push the address */
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addr = cpu_to_le16(address << 8 | SPI_ADRS_READ_BIT_15);
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spi_message_init(&m);
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memset(t, 0, sizeof(t));
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t[0].tx_buf = &addr;
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t[0].len = sizeof(addr);
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spi_message_add_tail(&t[0], &m);
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t[1].rx_buf = buf;
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t[1].len = len;
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spi_message_add_tail(&t[1], &m);
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spi_sync(priv->spi, &m);
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}
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static void p54spi_spi_write(struct p54s_priv *priv, u8 address,
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const void *buf, size_t len)
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{
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struct spi_transfer t[3];
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struct spi_message m;
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__le16 addr;
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/* We first push the address */
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addr = cpu_to_le16(address << 8);
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spi_message_init(&m);
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memset(t, 0, sizeof(t));
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t[0].tx_buf = &addr;
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t[0].len = sizeof(addr);
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spi_message_add_tail(&t[0], &m);
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t[1].tx_buf = buf;
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t[1].len = len;
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spi_message_add_tail(&t[1], &m);
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if (len % 2) {
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__le16 last_word;
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last_word = cpu_to_le16(((u8 *)buf)[len - 1]);
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t[2].tx_buf = &last_word;
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t[2].len = sizeof(last_word);
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spi_message_add_tail(&t[2], &m);
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}
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spi_sync(priv->spi, &m);
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}
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static u16 p54spi_read16(struct p54s_priv *priv, u8 addr)
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{
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__le16 val;
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p54spi_spi_read(priv, addr, &val, sizeof(val));
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return le16_to_cpu(val);
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}
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static u32 p54spi_read32(struct p54s_priv *priv, u8 addr)
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{
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__le32 val;
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p54spi_spi_read(priv, addr, &val, sizeof(val));
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return le32_to_cpu(val);
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}
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static inline void p54spi_write16(struct p54s_priv *priv, u8 addr, __le16 val)
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{
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p54spi_spi_write(priv, addr, &val, sizeof(val));
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}
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static inline void p54spi_write32(struct p54s_priv *priv, u8 addr, __le32 val)
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{
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p54spi_spi_write(priv, addr, &val, sizeof(val));
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}
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struct p54spi_spi_reg {
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u16 address; /* __le16 ? */
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u16 length;
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char *name;
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};
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static const struct p54spi_spi_reg p54spi_registers_array[] =
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{
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{ SPI_ADRS_ARM_INTERRUPTS, 32, "ARM_INT " },
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{ SPI_ADRS_ARM_INT_EN, 32, "ARM_INT_ENA " },
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{ SPI_ADRS_HOST_INTERRUPTS, 32, "HOST_INT " },
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{ SPI_ADRS_HOST_INT_EN, 32, "HOST_INT_ENA" },
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{ SPI_ADRS_HOST_INT_ACK, 32, "HOST_INT_ACK" },
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{ SPI_ADRS_GEN_PURP_1, 32, "GP1_COMM " },
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{ SPI_ADRS_GEN_PURP_2, 32, "GP2_COMM " },
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{ SPI_ADRS_DEV_CTRL_STAT, 32, "DEV_CTRL_STA" },
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{ SPI_ADRS_DMA_DATA, 16, "DMA_DATA " },
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{ SPI_ADRS_DMA_WRITE_CTRL, 16, "DMA_WR_CTRL " },
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{ SPI_ADRS_DMA_WRITE_LEN, 16, "DMA_WR_LEN " },
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{ SPI_ADRS_DMA_WRITE_BASE, 32, "DMA_WR_BASE " },
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{ SPI_ADRS_DMA_READ_CTRL, 16, "DMA_RD_CTRL " },
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{ SPI_ADRS_DMA_READ_LEN, 16, "DMA_RD_LEN " },
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{ SPI_ADRS_DMA_WRITE_BASE, 32, "DMA_RD_BASE " }
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};
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static int p54spi_wait_bit(struct p54s_priv *priv, u16 reg, __le32 bits)
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{
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int i;
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__le32 buffer;
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for (i = 0; i < 2000; i++) {
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p54spi_spi_read(priv, reg, &buffer, sizeof(buffer));
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if (buffer == bits)
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return 1;
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msleep(1);
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}
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return 0;
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}
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static int p54spi_request_firmware(struct ieee80211_hw *dev)
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{
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struct p54s_priv *priv = dev->priv;
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int ret;
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/* FIXME: should driver use it's own struct device? */
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ret = request_firmware(&priv->firmware, "3826.arm", &priv->spi->dev);
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if (ret < 0) {
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dev_err(&priv->spi->dev, "request_firmware() failed: %d", ret);
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return ret;
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}
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ret = p54_parse_firmware(dev, priv->firmware);
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if (ret) {
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release_firmware(priv->firmware);
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return ret;
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}
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return 0;
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}
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static int p54spi_request_eeprom(struct ieee80211_hw *dev)
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{
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struct p54s_priv *priv = dev->priv;
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const struct firmware *eeprom;
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int ret;
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/*
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* allow users to customize their eeprom.
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*/
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ret = request_firmware(&eeprom, "3826.eeprom", &priv->spi->dev);
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if (ret < 0) {
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dev_info(&priv->spi->dev, "loading default eeprom...\n");
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ret = p54_parse_eeprom(dev, (void *) p54spi_eeprom,
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sizeof(p54spi_eeprom));
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} else {
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dev_info(&priv->spi->dev, "loading user eeprom...\n");
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ret = p54_parse_eeprom(dev, (void *) eeprom->data,
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(int)eeprom->size);
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release_firmware(eeprom);
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}
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return ret;
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}
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static int p54spi_upload_firmware(struct ieee80211_hw *dev)
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{
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struct p54s_priv *priv = dev->priv;
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unsigned long fw_len, fw_addr;
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long _fw_len;
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/* stop the device */
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p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
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SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_HOST_RESET |
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SPI_CTRL_STAT_START_HALTED));
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msleep(TARGET_BOOT_SLEEP);
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p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
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SPI_CTRL_STAT_HOST_OVERRIDE |
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SPI_CTRL_STAT_START_HALTED));
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msleep(TARGET_BOOT_SLEEP);
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fw_addr = ISL38XX_DEV_FIRMWARE_ADDR;
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fw_len = priv->firmware->size;
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while (fw_len > 0) {
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_fw_len = min_t(long, fw_len, SPI_MAX_PACKET_SIZE);
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p54spi_write16(priv, SPI_ADRS_DMA_WRITE_CTRL,
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cpu_to_le16(SPI_DMA_WRITE_CTRL_ENABLE));
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if (p54spi_wait_bit(priv, SPI_ADRS_DMA_WRITE_CTRL,
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cpu_to_le32(HOST_ALLOWED)) == 0) {
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dev_err(&priv->spi->dev, "fw_upload not allowed "
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"to DMA write.");
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return -EAGAIN;
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}
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p54spi_write16(priv, SPI_ADRS_DMA_WRITE_LEN,
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cpu_to_le16(_fw_len));
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p54spi_write32(priv, SPI_ADRS_DMA_WRITE_BASE,
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cpu_to_le32(fw_addr));
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p54spi_spi_write(priv, SPI_ADRS_DMA_DATA,
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&priv->firmware->data, _fw_len);
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fw_len -= _fw_len;
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fw_addr += _fw_len;
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/* FIXME: I think this doesn't work if firmware is large,
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* this loop goes to second round. fw->data is not
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* increased at all! */
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}
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BUG_ON(fw_len != 0);
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/* enable host interrupts */
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p54spi_write32(priv, SPI_ADRS_HOST_INT_EN,
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cpu_to_le32(SPI_HOST_INTS_DEFAULT));
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/* boot the device */
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p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
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SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_HOST_RESET |
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SPI_CTRL_STAT_RAM_BOOT));
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msleep(TARGET_BOOT_SLEEP);
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p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
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SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_RAM_BOOT));
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msleep(TARGET_BOOT_SLEEP);
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return 0;
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}
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static void p54spi_power_off(struct p54s_priv *priv)
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{
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disable_irq(gpio_to_irq(priv->config->irq_gpio));
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gpio_set_value(priv->config->power_gpio, 0);
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}
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static void p54spi_power_on(struct p54s_priv *priv)
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{
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gpio_set_value(priv->config->power_gpio, 1);
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enable_irq(gpio_to_irq(priv->config->irq_gpio));
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/*
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* need to wait a while before device can be accessed, the lenght
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* is just a guess
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*/
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msleep(10);
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}
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static inline void p54spi_int_ack(struct p54s_priv *priv, u32 val)
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{
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p54spi_write32(priv, SPI_ADRS_HOST_INT_ACK, cpu_to_le32(val));
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}
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static void p54spi_wakeup(struct p54s_priv *priv)
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{
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unsigned long timeout;
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u32 ints;
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/* wake the chip */
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p54spi_write32(priv, SPI_ADRS_ARM_INTERRUPTS,
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cpu_to_le32(SPI_TARGET_INT_WAKEUP));
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/* And wait for the READY interrupt */
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timeout = jiffies + HZ;
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ints = p54spi_read32(priv, SPI_ADRS_HOST_INTERRUPTS);
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while (!(ints & SPI_HOST_INT_READY)) {
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if (time_after(jiffies, timeout))
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goto out;
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ints = p54spi_read32(priv, SPI_ADRS_HOST_INTERRUPTS);
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}
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p54spi_int_ack(priv, SPI_HOST_INT_READY);
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out:
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return;
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}
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static inline void p54spi_sleep(struct p54s_priv *priv)
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{
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p54spi_write32(priv, SPI_ADRS_ARM_INTERRUPTS,
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cpu_to_le32(SPI_TARGET_INT_SLEEP));
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}
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static void p54spi_int_ready(struct p54s_priv *priv)
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{
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p54spi_write32(priv, SPI_ADRS_HOST_INT_EN, cpu_to_le32(
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SPI_HOST_INT_UPDATE | SPI_HOST_INT_SW_UPDATE));
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switch (priv->fw_state) {
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case FW_STATE_BOOTING:
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priv->fw_state = FW_STATE_READY;
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complete(&priv->fw_comp);
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break;
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case FW_STATE_RESETTING:
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priv->fw_state = FW_STATE_READY;
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/* TODO: reinitialize state */
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break;
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default:
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break;
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}
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}
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static int p54spi_rx(struct p54s_priv *priv)
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{
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struct sk_buff *skb;
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u16 len;
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p54spi_wakeup(priv);
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/* dummy read to flush SPI DMA controller bug */
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p54spi_read16(priv, SPI_ADRS_GEN_PURP_1);
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len = p54spi_read16(priv, SPI_ADRS_DMA_DATA);
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if (len == 0) {
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dev_err(&priv->spi->dev, "rx request of zero bytes");
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return 0;
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}
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skb = dev_alloc_skb(len);
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if (!skb) {
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dev_err(&priv->spi->dev, "could not alloc skb");
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return 0;
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}
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p54spi_spi_read(priv, SPI_ADRS_DMA_DATA, skb_put(skb, len), len);
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p54spi_sleep(priv);
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if (p54_rx(priv->hw, skb) == 0)
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dev_kfree_skb(skb);
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return 0;
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}
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static irqreturn_t p54spi_interrupt(int irq, void *config)
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{
|
||||
struct spi_device *spi = config;
|
||||
struct p54s_priv *priv = dev_get_drvdata(&spi->dev);
|
||||
|
||||
queue_work(priv->hw->workqueue, &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;
|
||||
struct p54s_dma_regs dma_regs;
|
||||
unsigned long timeout;
|
||||
int ret = 0;
|
||||
u32 ints;
|
||||
|
||||
p54spi_wakeup(priv);
|
||||
|
||||
dma_regs.cmd = cpu_to_le16(SPI_DMA_WRITE_CTRL_ENABLE);
|
||||
dma_regs.len = cpu_to_le16(skb->len);
|
||||
dma_regs.addr = hdr->req_id;
|
||||
|
||||
p54spi_spi_write(priv, SPI_ADRS_DMA_WRITE_CTRL, &dma_regs,
|
||||
sizeof(dma_regs));
|
||||
|
||||
p54spi_spi_write(priv, SPI_ADRS_DMA_DATA, skb->data, skb->len);
|
||||
|
||||
timeout = jiffies + 2 * HZ;
|
||||
ints = p54spi_read32(priv, SPI_ADRS_HOST_INTERRUPTS);
|
||||
while (!(ints & SPI_HOST_INT_WR_READY)) {
|
||||
if (time_after(jiffies, timeout)) {
|
||||
dev_err(&priv->spi->dev, "WR_READY timeout");
|
||||
ret = -1;
|
||||
goto out;
|
||||
}
|
||||
ints = p54spi_read32(priv, SPI_ADRS_HOST_INTERRUPTS);
|
||||
}
|
||||
|
||||
p54spi_int_ack(priv, SPI_HOST_INT_WR_READY);
|
||||
p54spi_sleep(priv);
|
||||
|
||||
out:
|
||||
if (FREE_AFTER_TX(skb))
|
||||
p54_free_skb(priv->hw, skb);
|
||||
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;
|
||||
int ret = 0;
|
||||
|
||||
spin_lock_bh(&priv->tx_lock);
|
||||
|
||||
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_bh(&priv->tx_lock);
|
||||
|
||||
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);
|
||||
|
||||
spin_lock_bh(&priv->tx_lock);
|
||||
|
||||
if (ret < 0) {
|
||||
p54_free_skb(priv->hw, skb);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
out:
|
||||
spin_unlock_bh(&priv->tx_lock);
|
||||
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;
|
||||
|
||||
BUILD_BUG_ON(sizeof(*di) > sizeof((mi->data)));
|
||||
|
||||
spin_lock_bh(&priv->tx_lock);
|
||||
list_add_tail(&di->tx_list, &priv->tx_pending);
|
||||
spin_unlock_bh(&priv->tx_lock);
|
||||
|
||||
queue_work(priv->hw->workqueue, &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 &&
|
||||
priv->fw_state == FW_STATE_RESET)
|
||||
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);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
ints = p54spi_read32(priv, SPI_ADRS_HOST_INTERRUPTS);
|
||||
|
||||
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;
|
||||
|
||||
if (mutex_lock_interruptible(&priv->mutex)) {
|
||||
/* FIXME: how to handle this error? */
|
||||
return;
|
||||
}
|
||||
|
||||
WARN_ON(priv->fw_state != FW_STATE_READY);
|
||||
|
||||
cancel_work_sync(&priv->work);
|
||||
|
||||
p54spi_power_off(priv);
|
||||
spin_lock_bh(&priv->tx_lock);
|
||||
INIT_LIST_HEAD(&priv->tx_pending);
|
||||
spin_unlock_bh(&priv->tx_lock);
|
||||
|
||||
priv->fw_state = FW_STATE_OFF;
|
||||
mutex_unlock(&priv->mutex);
|
||||
}
|
||||
|
||||
static int __devinit 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(&priv->spi->dev, "could not alloc ieee80211_hw");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
priv = hw->priv;
|
||||
priv->hw = hw;
|
||||
dev_set_drvdata(&spi->dev, priv);
|
||||
priv->spi = spi;
|
||||
|
||||
priv->config = omap_get_config(OMAP_TAG_WLAN_CX3110X,
|
||||
struct omap_wlan_cx3110x_config);
|
||||
|
||||
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_common;
|
||||
}
|
||||
|
||||
ret = gpio_request(priv->config->power_gpio, "p54spi power");
|
||||
if (ret < 0) {
|
||||
dev_err(&priv->spi->dev, "power GPIO request failed: %d", ret);
|
||||
goto err_free_common;
|
||||
}
|
||||
|
||||
ret = gpio_request(priv->config->irq_gpio, "p54spi irq");
|
||||
if (ret < 0) {
|
||||
dev_err(&priv->spi->dev, "irq GPIO request failed: %d", ret);
|
||||
goto err_free_common;
|
||||
}
|
||||
|
||||
gpio_direction_output(priv->config->power_gpio, 0);
|
||||
gpio_direction_input(priv->config->irq_gpio);
|
||||
|
||||
ret = request_irq(OMAP_GPIO_IRQ(priv->config->irq_gpio),
|
||||
p54spi_interrupt, IRQF_DISABLED, "p54spi",
|
||||
priv->spi);
|
||||
if (ret < 0) {
|
||||
dev_err(&priv->spi->dev, "request_irq() failed");
|
||||
goto err_free_common;
|
||||
}
|
||||
|
||||
set_irq_type(gpio_to_irq(priv->config->irq_gpio),
|
||||
IRQ_TYPE_EDGE_RISING);
|
||||
|
||||
disable_irq(gpio_to_irq(priv->config->irq_gpio));
|
||||
|
||||
INIT_WORK(&priv->work, p54spi_work);
|
||||
init_completion(&priv->fw_comp);
|
||||
INIT_LIST_HEAD(&priv->tx_pending);
|
||||
mutex_init(&priv->mutex);
|
||||
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 = ieee80211_register_hw(hw);
|
||||
if (ret) {
|
||||
dev_err(&priv->spi->dev, "unable to register "
|
||||
"mac80211 hw: %d", ret);
|
||||
goto err_free_common;
|
||||
}
|
||||
|
||||
dev_info(&priv->spi->dev, "device is bound to %s\n",
|
||||
wiphy_name(hw->wiphy));
|
||||
return 0;
|
||||
|
||||
err_free_common:
|
||||
p54_free_common(priv->hw);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit p54spi_remove(struct spi_device *spi)
|
||||
{
|
||||
struct p54s_priv *priv = dev_get_drvdata(&spi->dev);
|
||||
|
||||
ieee80211_unregister_hw(priv->hw);
|
||||
|
||||
free_irq(gpio_to_irq(priv->config->irq_gpio), spi);
|
||||
|
||||
gpio_free(priv->config->power_gpio);
|
||||
gpio_free(priv->config->irq_gpio);
|
||||
release_firmware(priv->firmware);
|
||||
|
||||
mutex_destroy(&priv->mutex);
|
||||
|
||||
p54_free_common(priv->hw);
|
||||
ieee80211_free_hw(priv->hw);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static struct spi_driver p54spi_driver = {
|
||||
.driver = {
|
||||
/* use cx3110x name because board-n800.c uses that for the
|
||||
* SPI port */
|
||||
.name = "cx3110x",
|
||||
.bus = &spi_bus_type,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
|
||||
.probe = p54spi_probe,
|
||||
.remove = __devexit_p(p54spi_remove),
|
||||
};
|
||||
|
||||
static int __init p54spi_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
ret = spi_register_driver(&p54spi_driver);
|
||||
if (ret < 0) {
|
||||
printk(KERN_ERR "failed to register SPI driver: %d", ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit p54spi_exit(void)
|
||||
{
|
||||
spi_unregister_driver(&p54spi_driver);
|
||||
}
|
||||
|
||||
module_init(p54spi_init);
|
||||
module_exit(p54spi_exit);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_AUTHOR("Christian Lamparter <chunkeey@web.de>");
|
||||
127
drivers/net/wireless/p54/p54spi.h
Normal file
127
drivers/net/wireless/p54/p54spi.h
Normal file
@ -0,0 +1,127 @@
|
||||
/*
|
||||
* Copyright (C) 2008 Christian Lamparter <chunkeey@web.de>
|
||||
*
|
||||
* 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
|
||||
*/
|
||||
|
||||
#ifndef P54SPI_H
|
||||
#define P54SPI_H
|
||||
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/list.h>
|
||||
#include <net/mac80211.h>
|
||||
#include <mach/board.h>
|
||||
|
||||
#include "p54.h"
|
||||
|
||||
/* Bit 15 is read/write bit; ON = READ, OFF = WRITE */
|
||||
#define SPI_ADRS_READ_BIT_15 0x8000
|
||||
|
||||
#define SPI_ADRS_ARM_INTERRUPTS 0x00
|
||||
#define SPI_ADRS_ARM_INT_EN 0x04
|
||||
|
||||
#define SPI_ADRS_HOST_INTERRUPTS 0x08
|
||||
#define SPI_ADRS_HOST_INT_EN 0x0c
|
||||
#define SPI_ADRS_HOST_INT_ACK 0x10
|
||||
|
||||
#define SPI_ADRS_GEN_PURP_1 0x14
|
||||
#define SPI_ADRS_GEN_PURP_2 0x18
|
||||
|
||||
#define SPI_ADRS_DEV_CTRL_STAT 0x26 /* high word */
|
||||
|
||||
#define SPI_ADRS_DMA_DATA 0x28
|
||||
|
||||
#define SPI_ADRS_DMA_WRITE_CTRL 0x2c
|
||||
#define SPI_ADRS_DMA_WRITE_LEN 0x2e
|
||||
#define SPI_ADRS_DMA_WRITE_BASE 0x30
|
||||
|
||||
#define SPI_ADRS_DMA_READ_CTRL 0x34
|
||||
#define SPI_ADRS_DMA_READ_LEN 0x36
|
||||
#define SPI_ADRS_DMA_READ_BASE 0x38
|
||||
|
||||
#define SPI_CTRL_STAT_HOST_OVERRIDE 0x8000
|
||||
#define SPI_CTRL_STAT_START_HALTED 0x4000
|
||||
#define SPI_CTRL_STAT_RAM_BOOT 0x2000
|
||||
#define SPI_CTRL_STAT_HOST_RESET 0x1000
|
||||
#define SPI_CTRL_STAT_HOST_CPU_EN 0x0800
|
||||
|
||||
#define SPI_DMA_WRITE_CTRL_ENABLE 0x0001
|
||||
#define SPI_DMA_READ_CTRL_ENABLE 0x0001
|
||||
#define HOST_ALLOWED (1 << 7)
|
||||
|
||||
#define SPI_TIMEOUT 100 /* msec */
|
||||
|
||||
#define SPI_MAX_TX_PACKETS 32
|
||||
|
||||
#define SPI_MAX_PACKET_SIZE 32767
|
||||
|
||||
#define SPI_TARGET_INT_WAKEUP 0x00000001
|
||||
#define SPI_TARGET_INT_SLEEP 0x00000002
|
||||
#define SPI_TARGET_INT_RDDONE 0x00000004
|
||||
|
||||
#define SPI_TARGET_INT_CTS 0x00004000
|
||||
#define SPI_TARGET_INT_DR 0x00008000
|
||||
|
||||
#define SPI_HOST_INT_READY 0x00000001
|
||||
#define SPI_HOST_INT_WR_READY 0x00000002
|
||||
#define SPI_HOST_INT_SW_UPDATE 0x00000004
|
||||
#define SPI_HOST_INT_UPDATE 0x10000000
|
||||
|
||||
/* clear to send */
|
||||
#define SPI_HOST_INT_CR 0x00004000
|
||||
|
||||
/* data ready */
|
||||
#define SPI_HOST_INT_DR 0x00008000
|
||||
|
||||
#define SPI_HOST_INTS_DEFAULT \
|
||||
(SPI_HOST_INT_READY | SPI_HOST_INT_UPDATE | SPI_HOST_INT_SW_UPDATE)
|
||||
|
||||
#define TARGET_BOOT_SLEEP 50
|
||||
|
||||
struct p54s_dma_regs {
|
||||
__le16 cmd;
|
||||
__le16 len;
|
||||
__le32 addr;
|
||||
} __attribute__ ((packed));
|
||||
|
||||
struct p54s_tx_info {
|
||||
struct list_head tx_list;
|
||||
};
|
||||
|
||||
struct p54s_priv {
|
||||
/* p54_common has to be the first entry */
|
||||
struct p54_common common;
|
||||
struct ieee80211_hw *hw;
|
||||
struct spi_device *spi;
|
||||
const struct omap_wlan_cx3110x_config *config;
|
||||
|
||||
struct work_struct work;
|
||||
|
||||
struct mutex mutex;
|
||||
struct completion fw_comp;
|
||||
|
||||
spinlock_t tx_lock;
|
||||
|
||||
/* protected by tx_lock */
|
||||
struct list_head tx_pending;
|
||||
|
||||
enum fw_state fw_state;
|
||||
const struct firmware *firmware;
|
||||
};
|
||||
|
||||
#endif /* P54SPI_H */
|
||||
Loading…
Reference in New Issue
Block a user