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1e73eb62ce
This patch implements looped IRQ handling. In essence, if a new interrupt is asserted by the FW while the host is processing the previous one, the host will directly proceed processing the new IRQ without leaving the handling function. Signed-off-by: Juuso Oikarinen <juuso.oikarinen@nokia.com> Reviewed-by: Teemu Paasikivi <ext-teemu.3.paasikivi@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
308 lines
6.5 KiB
C
308 lines
6.5 KiB
C
/*
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* This file is part of wl1271
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*
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* Copyright (C) 2009-2010 Nokia Corporation
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*
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* Contact: Luciano Coelho <luciano.coelho@nokia.com>
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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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*/
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#include <linux/irq.h>
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#include <linux/module.h>
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#include <linux/crc7.h>
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#include <linux/vmalloc.h>
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#include <linux/mmc/sdio_func.h>
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#include <linux/mmc/sdio_ids.h>
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#include <linux/mmc/card.h>
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#include <plat/gpio.h>
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#include "wl1271.h"
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#include "wl12xx_80211.h"
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#include "wl1271_io.h"
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#define RX71_WL1271_IRQ_GPIO 42
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#ifndef SDIO_VENDOR_ID_TI
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#define SDIO_VENDOR_ID_TI 0x0097
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#endif
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#ifndef SDIO_DEVICE_ID_TI_WL1271
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#define SDIO_DEVICE_ID_TI_WL1271 0x4076
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#endif
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static const struct sdio_device_id wl1271_devices[] = {
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{ SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
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{}
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};
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MODULE_DEVICE_TABLE(sdio, wl1271_devices);
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static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
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{
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return wl->if_priv;
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}
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static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
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{
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return &(wl_to_func(wl)->dev);
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}
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static irqreturn_t wl1271_irq(int irq, void *cookie)
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{
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struct wl1271 *wl = cookie;
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unsigned long flags;
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wl1271_debug(DEBUG_IRQ, "IRQ");
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/* complete the ELP completion */
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spin_lock_irqsave(&wl->wl_lock, flags);
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if (wl->elp_compl) {
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complete(wl->elp_compl);
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wl->elp_compl = NULL;
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}
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if (!test_and_set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags))
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ieee80211_queue_work(wl->hw, &wl->irq_work);
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set_bit(WL1271_FLAG_IRQ_PENDING, &wl->flags);
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spin_unlock_irqrestore(&wl->wl_lock, flags);
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return IRQ_HANDLED;
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}
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static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
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{
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disable_irq(wl->irq);
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}
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static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
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{
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enable_irq(wl->irq);
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}
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static void wl1271_sdio_reset(struct wl1271 *wl)
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{
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}
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static void wl1271_sdio_init(struct wl1271 *wl)
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{
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}
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static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
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size_t len, bool fixed)
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{
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int ret;
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struct sdio_func *func = wl_to_func(wl);
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sdio_claim_host(func);
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if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
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((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
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wl1271_debug(DEBUG_SPI, "sdio read 52 addr 0x%x, byte 0x%02x",
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addr, ((u8 *)buf)[0]);
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} else {
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if (fixed)
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ret = sdio_readsb(func, buf, addr, len);
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else
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ret = sdio_memcpy_fromio(func, buf, addr, len);
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wl1271_debug(DEBUG_SPI, "sdio read 53 addr 0x%x, %d bytes",
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addr, len);
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wl1271_dump_ascii(DEBUG_SPI, "data: ", buf, len);
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}
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if (ret)
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wl1271_error("sdio read failed (%d)", ret);
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sdio_release_host(func);
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}
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static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
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size_t len, bool fixed)
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{
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int ret;
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struct sdio_func *func = wl_to_func(wl);
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sdio_claim_host(func);
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if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
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sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
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wl1271_debug(DEBUG_SPI, "sdio write 52 addr 0x%x, byte 0x%02x",
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addr, ((u8 *)buf)[0]);
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} else {
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wl1271_debug(DEBUG_SPI, "sdio write 53 addr 0x%x, %d bytes",
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addr, len);
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wl1271_dump_ascii(DEBUG_SPI, "data: ", buf, len);
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if (fixed)
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ret = sdio_writesb(func, addr, buf, len);
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else
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ret = sdio_memcpy_toio(func, addr, buf, len);
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}
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if (ret)
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wl1271_error("sdio write failed (%d)", ret);
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sdio_release_host(func);
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}
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static struct wl1271_if_operations sdio_ops = {
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.read = wl1271_sdio_raw_read,
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.write = wl1271_sdio_raw_write,
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.reset = wl1271_sdio_reset,
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.init = wl1271_sdio_init,
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.dev = wl1271_sdio_wl_to_dev,
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.enable_irq = wl1271_sdio_enable_interrupts,
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.disable_irq = wl1271_sdio_disable_interrupts
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};
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static void wl1271_sdio_set_power(bool enable)
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{
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}
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static int __devinit wl1271_probe(struct sdio_func *func,
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const struct sdio_device_id *id)
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{
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struct ieee80211_hw *hw;
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struct wl1271 *wl;
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int ret;
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/* We are only able to handle the wlan function */
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if (func->num != 0x02)
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return -ENODEV;
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hw = wl1271_alloc_hw();
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if (IS_ERR(hw))
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return PTR_ERR(hw);
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wl = hw->priv;
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wl->if_priv = func;
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wl->if_ops = &sdio_ops;
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wl->set_power = wl1271_sdio_set_power;
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/* Grab access to FN0 for ELP reg. */
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func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
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wl->irq = gpio_to_irq(RX71_WL1271_IRQ_GPIO);
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if (wl->irq < 0) {
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ret = wl->irq;
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wl1271_error("could not get irq!");
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goto out_free;
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}
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ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
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if (ret < 0) {
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wl1271_error("request_irq() failed: %d", ret);
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goto out_free;
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}
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set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
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disable_irq(wl->irq);
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ret = wl1271_init_ieee80211(wl);
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if (ret)
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goto out_irq;
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ret = wl1271_register_hw(wl);
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if (ret)
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goto out_irq;
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sdio_claim_host(func);
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sdio_set_drvdata(func, wl);
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ret = sdio_enable_func(func);
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if (ret)
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goto out_release;
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sdio_release_host(func);
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wl1271_notice("initialized");
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return 0;
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out_release:
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sdio_release_host(func);
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out_irq:
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free_irq(wl->irq, wl);
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out_free:
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ieee80211_free_hw(hw);
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return ret;
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}
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static void __devexit wl1271_remove(struct sdio_func *func)
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{
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struct wl1271 *wl = sdio_get_drvdata(func);
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ieee80211_unregister_hw(wl->hw);
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sdio_claim_host(func);
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sdio_disable_func(func);
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sdio_release_host(func);
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free_irq(wl->irq, wl);
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kfree(wl->target_mem_map);
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vfree(wl->fw);
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wl->fw = NULL;
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kfree(wl->nvs);
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wl->nvs = NULL;
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kfree(wl->fw_status);
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kfree(wl->tx_res_if);
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ieee80211_free_hw(wl->hw);
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}
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static struct sdio_driver wl1271_sdio_driver = {
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.name = "wl1271",
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.id_table = wl1271_devices,
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.probe = wl1271_probe,
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.remove = __devexit_p(wl1271_remove),
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};
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static int __init wl1271_init(void)
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{
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int ret;
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ret = sdio_register_driver(&wl1271_sdio_driver);
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if (ret < 0) {
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wl1271_error("failed to register sdio driver: %d", ret);
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goto out;
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}
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out:
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return ret;
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}
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static void __exit wl1271_exit(void)
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{
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sdio_unregister_driver(&wl1271_sdio_driver);
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wl1271_notice("unloaded");
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}
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module_init(wl1271_init);
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module_exit(wl1271_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
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MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
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MODULE_FIRMWARE(WL1271_FW_NAME);
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