2013-05-25 07:04:38 +07:00
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/*
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* Mac80211 SDIO driver for ST-Ericsson CW1200 device
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*
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* Copyright (c) 2010, ST-Ericsson
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* Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/sdio_func.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/sdio.h>
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#include <net/mac80211.h>
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#include "cw1200.h"
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2013-06-01 19:08:42 +07:00
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#include "hwbus.h"
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2013-06-02 22:35:32 +07:00
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#include <linux/platform_data/net-cw1200.h>
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2013-05-25 07:04:38 +07:00
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#include "hwio.h"
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MODULE_AUTHOR("Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>");
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MODULE_DESCRIPTION("mac80211 ST-Ericsson CW1200 SDIO driver");
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MODULE_LICENSE("GPL");
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#define SDIO_BLOCK_SIZE (512)
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2013-06-02 22:35:31 +07:00
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/* Default platform data for Sagrad modules */
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static struct cw1200_platform_data_sdio sagrad_109x_evk_platform_data = {
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.ref_clk = 38400,
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.have_5ghz = false,
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.sdd_file = "sdd_sagrad_1091_1098.bin",
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};
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/* Allow platform data to be overridden */
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static struct cw1200_platform_data_sdio *global_plat_data = &sagrad_109x_evk_platform_data;
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void __init cw1200_sdio_set_platform_data(struct cw1200_platform_data_sdio *pdata)
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{
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global_plat_data = pdata;
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}
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2013-06-01 19:08:42 +07:00
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struct hwbus_priv {
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2013-05-25 07:04:38 +07:00
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struct sdio_func *func;
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struct cw1200_common *core;
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const struct cw1200_platform_data_sdio *pdata;
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};
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#ifndef SDIO_VENDOR_ID_STE
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#define SDIO_VENDOR_ID_STE 0x0020
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#endif
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#ifndef SDIO_DEVICE_ID_STE_CW1200
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#define SDIO_DEVICE_ID_STE_CW1200 0x2280
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#endif
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static const struct sdio_device_id cw1200_sdio_ids[] = {
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{ SDIO_DEVICE(SDIO_VENDOR_ID_STE, SDIO_DEVICE_ID_STE_CW1200) },
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{ /* end: all zeroes */ },
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};
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2013-06-01 19:08:42 +07:00
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/* hwbus_ops implemetation */
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2013-05-25 07:04:38 +07:00
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2013-06-01 19:08:42 +07:00
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static int cw1200_sdio_memcpy_fromio(struct hwbus_priv *self,
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2013-05-25 07:04:38 +07:00
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unsigned int addr,
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void *dst, int count)
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{
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return sdio_memcpy_fromio(self->func, dst, addr, count);
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}
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2013-06-01 19:08:42 +07:00
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static int cw1200_sdio_memcpy_toio(struct hwbus_priv *self,
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2013-05-25 07:04:38 +07:00
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unsigned int addr,
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const void *src, int count)
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{
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return sdio_memcpy_toio(self->func, addr, (void *)src, count);
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}
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2013-06-01 19:08:42 +07:00
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static void cw1200_sdio_lock(struct hwbus_priv *self)
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2013-05-25 07:04:38 +07:00
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{
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sdio_claim_host(self->func);
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}
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2013-06-01 19:08:42 +07:00
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static void cw1200_sdio_unlock(struct hwbus_priv *self)
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2013-05-25 07:04:38 +07:00
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{
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sdio_release_host(self->func);
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}
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static void cw1200_sdio_irq_handler(struct sdio_func *func)
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{
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2013-06-01 19:08:42 +07:00
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struct hwbus_priv *self = sdio_get_drvdata(func);
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2013-05-25 07:04:38 +07:00
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/* note: sdio_host already claimed here. */
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if (self->core)
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cw1200_irq_handler(self->core);
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}
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static irqreturn_t cw1200_gpio_hardirq(int irq, void *dev_id)
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{
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return IRQ_WAKE_THREAD;
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}
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static irqreturn_t cw1200_gpio_irq(int irq, void *dev_id)
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{
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2013-06-01 19:08:42 +07:00
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struct hwbus_priv *self = dev_id;
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2013-05-25 07:04:38 +07:00
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if (self->core) {
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2013-10-26 05:15:43 +07:00
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cw1200_sdio_lock(self);
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2013-05-25 07:04:38 +07:00
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cw1200_irq_handler(self->core);
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2013-10-26 05:15:43 +07:00
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cw1200_sdio_unlock(self);
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2013-05-25 07:04:38 +07:00
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return IRQ_HANDLED;
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} else {
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return IRQ_NONE;
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}
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}
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2013-06-01 19:08:42 +07:00
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static int cw1200_request_irq(struct hwbus_priv *self)
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2013-05-25 07:04:38 +07:00
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{
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int ret;
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u8 cccr;
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cccr = sdio_f0_readb(self->func, SDIO_CCCR_IENx, &ret);
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if (WARN_ON(ret))
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goto err;
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/* Master interrupt enable ... */
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cccr |= BIT(0);
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/* ... for our function */
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cccr |= BIT(self->func->num);
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sdio_f0_writeb(self->func, cccr, SDIO_CCCR_IENx, &ret);
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if (WARN_ON(ret))
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goto err;
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2013-06-02 20:53:03 +07:00
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ret = enable_irq_wake(self->pdata->irq);
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2013-05-25 07:04:38 +07:00
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if (WARN_ON(ret))
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goto err;
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/* Request the IRQ */
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2013-06-02 20:53:03 +07:00
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ret = request_threaded_irq(self->pdata->irq, cw1200_gpio_hardirq,
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2013-05-25 07:04:38 +07:00
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cw1200_gpio_irq,
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IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
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2013-06-02 20:53:03 +07:00
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"cw1200_wlan_irq", self);
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2013-05-25 07:04:38 +07:00
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if (WARN_ON(ret))
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goto err;
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return 0;
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err:
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return ret;
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}
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2013-06-01 19:08:42 +07:00
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static int cw1200_sdio_irq_subscribe(struct hwbus_priv *self)
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2013-05-25 07:04:38 +07:00
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{
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int ret = 0;
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pr_debug("SW IRQ subscribe\n");
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sdio_claim_host(self->func);
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if (self->pdata->irq)
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ret = cw1200_request_irq(self);
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else
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ret = sdio_claim_irq(self->func, cw1200_sdio_irq_handler);
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sdio_release_host(self->func);
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return ret;
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}
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2013-06-01 19:08:42 +07:00
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static int cw1200_sdio_irq_unsubscribe(struct hwbus_priv *self)
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2013-05-25 07:04:38 +07:00
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{
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int ret = 0;
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pr_debug("SW IRQ unsubscribe\n");
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if (self->pdata->irq) {
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2013-06-02 20:53:03 +07:00
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disable_irq_wake(self->pdata->irq);
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free_irq(self->pdata->irq, self);
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2013-05-25 07:04:38 +07:00
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} else {
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sdio_claim_host(self->func);
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ret = sdio_release_irq(self->func);
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sdio_release_host(self->func);
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}
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return ret;
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}
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static int cw1200_sdio_off(const struct cw1200_platform_data_sdio *pdata)
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{
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2013-06-02 20:53:03 +07:00
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if (pdata->reset) {
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gpio_set_value(pdata->reset, 0);
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2013-05-25 07:04:38 +07:00
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msleep(30); /* Min is 2 * CLK32K cycles */
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2013-06-02 20:53:03 +07:00
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gpio_free(pdata->reset);
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2013-05-25 07:04:38 +07:00
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}
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if (pdata->power_ctrl)
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pdata->power_ctrl(pdata, false);
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if (pdata->clk_ctrl)
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pdata->clk_ctrl(pdata, false);
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return 0;
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}
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static int cw1200_sdio_on(const struct cw1200_platform_data_sdio *pdata)
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{
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/* Ensure I/Os are pulled low */
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2013-06-02 20:53:03 +07:00
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if (pdata->reset) {
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gpio_request(pdata->reset, "cw1200_wlan_reset");
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gpio_direction_output(pdata->reset, 0);
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2013-05-25 07:04:38 +07:00
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}
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2013-06-02 20:53:03 +07:00
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if (pdata->powerup) {
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gpio_request(pdata->powerup, "cw1200_wlan_powerup");
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gpio_direction_output(pdata->powerup, 0);
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2013-05-25 07:04:38 +07:00
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}
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2013-06-02 20:53:03 +07:00
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if (pdata->reset || pdata->powerup)
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msleep(10); /* Settle time? */
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2013-05-25 07:04:38 +07:00
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/* Enable 3v3 and 1v8 to hardware */
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if (pdata->power_ctrl) {
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if (pdata->power_ctrl(pdata, true)) {
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pr_err("power_ctrl() failed!\n");
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return -1;
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}
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}
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/* Enable CLK32K */
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if (pdata->clk_ctrl) {
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if (pdata->clk_ctrl(pdata, true)) {
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pr_err("clk_ctrl() failed!\n");
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return -1;
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}
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msleep(10); /* Delay until clock is stable for 2 cycles */
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}
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/* Enable POWERUP signal */
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2013-06-02 20:53:03 +07:00
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if (pdata->powerup) {
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gpio_set_value(pdata->powerup, 1);
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2013-05-25 07:04:38 +07:00
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msleep(250); /* or more..? */
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}
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/* Enable RSTn signal */
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2013-06-02 20:53:03 +07:00
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if (pdata->reset) {
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gpio_set_value(pdata->reset, 1);
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2013-05-25 07:04:38 +07:00
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msleep(50); /* Or more..? */
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}
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return 0;
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}
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2013-06-01 19:08:42 +07:00
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static size_t cw1200_sdio_align_size(struct hwbus_priv *self, size_t size)
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2013-05-25 07:04:38 +07:00
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{
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if (self->pdata->no_nptb)
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size = round_up(size, SDIO_BLOCK_SIZE);
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else
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size = sdio_align_size(self->func, size);
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return size;
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}
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2013-06-01 19:08:42 +07:00
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static int cw1200_sdio_pm(struct hwbus_priv *self, bool suspend)
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2013-05-25 07:04:38 +07:00
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{
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int ret = 0;
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if (self->pdata->irq)
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2013-06-02 20:53:03 +07:00
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ret = irq_set_irq_wake(self->pdata->irq, suspend);
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2013-05-25 07:04:38 +07:00
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return ret;
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}
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2013-06-01 19:08:42 +07:00
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static struct hwbus_ops cw1200_sdio_hwbus_ops = {
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.hwbus_memcpy_fromio = cw1200_sdio_memcpy_fromio,
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.hwbus_memcpy_toio = cw1200_sdio_memcpy_toio,
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2013-05-25 07:04:38 +07:00
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.lock = cw1200_sdio_lock,
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.unlock = cw1200_sdio_unlock,
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.align_size = cw1200_sdio_align_size,
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.power_mgmt = cw1200_sdio_pm,
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};
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/* Probe Function to be called by SDIO stack when device is discovered */
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static int cw1200_sdio_probe(struct sdio_func *func,
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2013-06-02 22:35:31 +07:00
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const struct sdio_device_id *id)
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2013-05-25 07:04:38 +07:00
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{
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2013-06-01 19:08:42 +07:00
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struct hwbus_priv *self;
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2013-05-25 07:04:38 +07:00
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int status;
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pr_info("cw1200_wlan_sdio: Probe called\n");
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2013-06-02 20:53:03 +07:00
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/* We are only able to handle the wlan function */
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2013-05-25 07:04:38 +07:00
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if (func->num != 0x01)
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return -ENODEV;
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self = kzalloc(sizeof(*self), GFP_KERNEL);
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if (!self) {
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2013-06-01 19:08:42 +07:00
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pr_err("Can't allocate SDIO hwbus_priv.\n");
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2013-05-25 07:04:38 +07:00
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return -ENOMEM;
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}
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func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
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2013-06-02 22:35:31 +07:00
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self->pdata = global_plat_data; /* FIXME */
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2013-05-25 07:04:38 +07:00
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self->func = func;
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sdio_set_drvdata(func, self);
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sdio_claim_host(func);
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sdio_enable_func(func);
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sdio_release_host(func);
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status = cw1200_sdio_irq_subscribe(self);
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2013-06-01 19:08:42 +07:00
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status = cw1200_core_probe(&cw1200_sdio_hwbus_ops,
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2013-05-25 07:04:38 +07:00
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self, &func->dev, &self->core,
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self->pdata->ref_clk,
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self->pdata->macaddr,
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self->pdata->sdd_file,
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self->pdata->have_5ghz);
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if (status) {
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cw1200_sdio_irq_unsubscribe(self);
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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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sdio_set_drvdata(func, NULL);
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kfree(self);
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}
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return status;
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}
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/* Disconnect Function to be called by SDIO stack when
|
2013-06-11 20:49:40 +07:00
|
|
|
* device is disconnected
|
|
|
|
*/
|
2013-05-25 07:04:38 +07:00
|
|
|
static void cw1200_sdio_disconnect(struct sdio_func *func)
|
|
|
|
{
|
2013-06-01 19:08:42 +07:00
|
|
|
struct hwbus_priv *self = sdio_get_drvdata(func);
|
2013-05-25 07:04:38 +07:00
|
|
|
|
|
|
|
if (self) {
|
|
|
|
cw1200_sdio_irq_unsubscribe(self);
|
|
|
|
if (self->core) {
|
|
|
|
cw1200_core_release(self->core);
|
|
|
|
self->core = NULL;
|
|
|
|
}
|
|
|
|
sdio_claim_host(func);
|
|
|
|
sdio_disable_func(func);
|
|
|
|
sdio_release_host(func);
|
|
|
|
sdio_set_drvdata(func, NULL);
|
|
|
|
kfree(self);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-05-30 09:22:05 +07:00
|
|
|
#ifdef CONFIG_PM
|
2013-05-25 07:04:38 +07:00
|
|
|
static int cw1200_sdio_suspend(struct device *dev)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
struct sdio_func *func = dev_to_sdio_func(dev);
|
2013-06-01 19:08:42 +07:00
|
|
|
struct hwbus_priv *self = sdio_get_drvdata(func);
|
2013-05-25 07:04:38 +07:00
|
|
|
|
|
|
|
if (!cw1200_can_suspend(self->core))
|
|
|
|
return -EAGAIN;
|
|
|
|
|
|
|
|
/* Notify SDIO that CW1200 will remain powered during suspend */
|
|
|
|
ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
|
|
|
|
if (ret)
|
|
|
|
pr_err("Error setting SDIO pm flags: %i\n", ret);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int cw1200_sdio_resume(struct device *dev)
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct dev_pm_ops cw1200_pm_ops = {
|
|
|
|
.suspend = cw1200_sdio_suspend,
|
|
|
|
.resume = cw1200_sdio_resume,
|
|
|
|
};
|
2013-05-30 09:22:05 +07:00
|
|
|
#endif
|
2013-05-25 07:04:38 +07:00
|
|
|
|
|
|
|
static struct sdio_driver sdio_driver = {
|
|
|
|
.name = "cw1200_wlan_sdio",
|
|
|
|
.id_table = cw1200_sdio_ids,
|
|
|
|
.probe = cw1200_sdio_probe,
|
|
|
|
.remove = cw1200_sdio_disconnect,
|
2013-05-30 09:22:05 +07:00
|
|
|
#ifdef CONFIG_PM
|
2013-05-25 07:04:38 +07:00
|
|
|
.drv = {
|
|
|
|
.pm = &cw1200_pm_ops,
|
|
|
|
}
|
2013-05-30 09:22:05 +07:00
|
|
|
#endif
|
2013-05-25 07:04:38 +07:00
|
|
|
};
|
|
|
|
|
|
|
|
/* Init Module function -> Called by insmod */
|
|
|
|
static int __init cw1200_sdio_init(void)
|
|
|
|
{
|
|
|
|
const struct cw1200_platform_data_sdio *pdata;
|
|
|
|
int ret;
|
|
|
|
|
2013-06-02 22:35:31 +07:00
|
|
|
/* FIXME -- this won't support multiple devices */
|
|
|
|
pdata = global_plat_data;
|
2013-05-25 07:04:38 +07:00
|
|
|
|
|
|
|
if (cw1200_sdio_on(pdata)) {
|
|
|
|
ret = -1;
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = sdio_register_driver(&sdio_driver);
|
|
|
|
if (ret)
|
|
|
|
goto err;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err:
|
|
|
|
cw1200_sdio_off(pdata);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Called at Driver Unloading */
|
|
|
|
static void __exit cw1200_sdio_exit(void)
|
|
|
|
{
|
|
|
|
const struct cw1200_platform_data_sdio *pdata;
|
2013-06-02 22:35:31 +07:00
|
|
|
|
|
|
|
/* FIXME -- this won't support multiple devices */
|
|
|
|
pdata = global_plat_data;
|
2013-05-25 07:04:38 +07:00
|
|
|
sdio_unregister_driver(&sdio_driver);
|
|
|
|
cw1200_sdio_off(pdata);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
module_init(cw1200_sdio_init);
|
|
|
|
module_exit(cw1200_sdio_exit);
|