1 files changed, 420 insertions, 0 deletions
diff --git a/drivers/net/wireless/bcmdhd/bcmsdspi_linux.c b/drivers/net/wireless/bcmdhd/bcmsdspi_linux.c
new file mode 100644
index 0000000..e834366
--- /dev/null
+++ b/drivers/net/wireless/bcmdhd/bcmsdspi_linux.c
@@ -0,0 +1,420 @@
+/*
+ * Broadcom SPI Host Controller Driver - Linux Per-port
+ *
+ * Copyright (C) 1999-2012, Broadcom Corporation
+ * 
+ *      Unless you and Broadcom execute a separate written software license
+ * agreement governing use of this software, this software is licensed to you
+ * under the terms of the GNU General Public License version 2 (the "GPL"),
+ * available at http://www.broadcom.com/licenses/GPLv2.php, with the
+ * following added to such license:
+ * 
+ *      As a special exception, the copyright holders of this software give you
+ * permission to link this software with independent modules, and to copy and
+ * distribute the resulting executable under terms of your choice, provided that
+ * you also meet, for each linked independent module, the terms and conditions of
+ * the license of that module.  An independent module is a module which is not
+ * derived from this software.  The special exception does not apply to any
+ * modifications of the software.
+ * 
+ *      Notwithstanding the above, under no circumstances may you combine this
+ * software in any way with any other Broadcom software provided under a license
+ * other than the GPL, without Broadcom's express prior written consent.
+ *
+ * $Id: bcmsdspi_linux.c 355376 2012-09-06 13:23:59Z $
+ */
+
+#include <typedefs.h>
+#include <bcmutils.h>
+
+#include <bcmsdbus.h>		/* bcmsdh to/from specific controller APIs */
+#include <sdiovar.h>		/* to get msglevel bit values */
+
+#ifndef BCMSPI_ANDROID
+#include <pcicfg.h>
+#include <sdio.h>		/* SDIO Device and Protocol Specs */
+#include <linux/sched.h>	/* request_irq(), free_irq() */
+#include <bcmsdspi.h>
+#include <bcmspi.h>
+
+extern uint sd_crc;
+module_param(sd_crc, uint, 0);
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+#define KERNEL26
+#endif
+
+struct sdos_info {
+	sdioh_info_t *sd;
+	spinlock_t lock;
+	wait_queue_head_t intr_wait_queue;
+};
+
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0))
+#define BLOCKABLE()	(!in_atomic())
+#else
+#define BLOCKABLE()	(!in_interrupt())
+#endif
+
+/* Interrupt handler */
+static irqreturn_t
+sdspi_isr(int irq, void *dev_id
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
+, struct pt_regs *ptregs
+#endif
+)
+{
+	sdioh_info_t *sd;
+	struct sdos_info *sdos;
+	bool ours;
+
+	sd = (sdioh_info_t *)dev_id;
+	sd->local_intrcount++;
+
+	if (!sd->card_init_done) {
+		sd_err(("%s: Hey Bogus intr...not even initted: irq %d\n", __FUNCTION__, irq));
+		return IRQ_RETVAL(FALSE);
+	} else {
+		ours = spi_check_client_intr(sd, NULL);
+
+		/* For local interrupts, wake the waiting process */
+		if (ours && sd->got_hcint) {
+			sdos = (struct sdos_info *)sd->sdos_info;
+			wake_up_interruptible(&sdos->intr_wait_queue);
+		}
+
+		return IRQ_RETVAL(ours);
+	}
+}
+#else /* !BCMSPI_ANDROID */
+#include <bcmspibrcm.h>
+#include <linux/spi/spi.h>
+
+static struct spi_device *gBCMSPI = NULL;
+
+extern int bcmsdh_probe(struct device *dev);
+extern int bcmsdh_remove(struct device *dev);
+
+static int bcmsdh_spi_probe(struct spi_device *spi_dev)
+{
+	int ret = 0;
+
+	gBCMSPI = spi_dev;
+
+#ifdef SPI_PIO_32BIT_RW
+	spi_dev->bits_per_word = 32;
+#else
+	spi_dev->bits_per_word = 8;
+#endif /* SPI_PIO_32BIT_RW */
+	ret = spi_setup(spi_dev);
+
+	if (ret) {
+		sd_err(("bcmsdh_spi_probe: spi_setup fail with %d\n", ret));
+	}
+	sd_err(("bcmsdh_spi_probe: spi_setup with %d, bits_per_word=%d\n",
+		ret, spi_dev->bits_per_word));
+	ret = bcmsdh_probe(&spi_dev->dev);
+
+	return ret;
+}
+
+static int  bcmsdh_spi_remove(struct spi_device *spi_dev)
+{
+	int ret = 0;
+
+	ret = bcmsdh_remove(&spi_dev->dev);
+	gBCMSPI = NULL;
+
+	return ret;
+}
+
+static struct spi_driver bcmsdh_spi_driver = {
+	.probe		= bcmsdh_spi_probe,
+	.remove		= bcmsdh_spi_remove,
+	.driver		= {
+		.name = "wlan_spi",
+		.bus    = &spi_bus_type,
+		.owner  = THIS_MODULE,
+		},
+};
+
+/*
+ * module init
+*/
+int spi_function_init(void)
+{
+	int error = 0;
+	sd_trace(("bcmsdh_gspi: %s Enter\n", __FUNCTION__));
+
+	error = spi_register_driver(&bcmsdh_spi_driver);
+
+	return error;
+}
+
+/*
+ * module cleanup
+*/
+void spi_function_cleanup(void)
+{
+	sd_trace(("%s Enter\n", __FUNCTION__));
+	spi_unregister_driver(&bcmsdh_spi_driver);
+}
+#endif /* !BCMSPI_ANDROID */
+
+/* Register with Linux for interrupts */
+int
+spi_register_irq(sdioh_info_t *sd, uint irq)
+{
+#ifndef BCMSPI_ANDROID
+	sd_trace(("Entering %s: irq == %d\n", __FUNCTION__, irq));
+	if (request_irq(irq, sdspi_isr, IRQF_SHARED, "bcmsdspi", sd) < 0) {
+		sd_err(("%s: request_irq() failed\n", __FUNCTION__));
+		return ERROR;
+	}
+#endif /* !BCMSPI_ANDROID */
+	return SUCCESS;
+}
+
+/* Free Linux irq */
+void
+spi_free_irq(uint irq, sdioh_info_t *sd)
+{
+#ifndef BCMSPI_ANDROID
+	free_irq(irq, sd);
+#endif /* !BCMSPI_ANDROID */
+}
+
+/* Map Host controller registers */
+#ifndef BCMSPI_ANDROID
+uint32 *
+spi_reg_map(osl_t *osh, uintptr addr, int size)
+{
+	return (uint32 *)REG_MAP(addr, size);
+}
+
+void
+spi_reg_unmap(osl_t *osh, uintptr addr, int size)
+{
+	REG_UNMAP((void*)(uintptr)addr);
+}
+#endif /* !BCMSPI_ANDROID */
+
+int
+spi_osinit(sdioh_info_t *sd)
+{
+#ifndef BCMSPI_ANDROID
+	struct sdos_info *sdos;
+
+	sdos = (struct sdos_info*)MALLOC(sd->osh, sizeof(struct sdos_info));
+	sd->sdos_info = (void*)sdos;
+	if (sdos == NULL)
+		return BCME_NOMEM;
+
+	sdos->sd = sd;
+	spin_lock_init(&sdos->lock);
+	init_waitqueue_head(&sdos->intr_wait_queue);
+#endif /* !BCMSPI_ANDROID */
+return BCME_OK;
+}
+
+void
+spi_osfree(sdioh_info_t *sd)
+{
+#ifndef BCMSPI_ANDROID
+	struct sdos_info *sdos;
+	ASSERT(sd && sd->sdos_info);
+
+	sdos = (struct sdos_info *)sd->sdos_info;
+	MFREE(sd->osh, sdos, sizeof(struct sdos_info));
+#endif /* !BCMSPI_ANDROID */
+}
+
+/* Interrupt enable/disable */
+SDIOH_API_RC
+sdioh_interrupt_set(sdioh_info_t *sd, bool enable)
+{
+#ifndef BCMSPI_ANDROID
+	ulong flags;
+	struct sdos_info *sdos;
+
+	sd_trace(("%s: %s\n", __FUNCTION__, enable ? "Enabling" : "Disabling"));
+
+	sdos = (struct sdos_info *)sd->sdos_info;
+	ASSERT(sdos);
+
+	if (!(sd->host_init_done && sd->card_init_done)) {
+		sd_err(("%s: Card & Host are not initted - bailing\n", __FUNCTION__));
+		return SDIOH_API_RC_FAIL;
+	}
+
+	if (enable && !(sd->intr_handler && sd->intr_handler_arg)) {
+		sd_err(("%s: no handler registered, will not enable\n", __FUNCTION__));
+		return SDIOH_API_RC_FAIL;
+	}
+
+	/* Ensure atomicity for enable/disable calls */
+	spin_lock_irqsave(&sdos->lock, flags);
+
+	sd->client_intr_enabled = enable;
+	if (enable && !sd->lockcount)
+		spi_devintr_on(sd);
+	else
+		spi_devintr_off(sd);
+
+	spin_unlock_irqrestore(&sdos->lock, flags);
+#endif /* !BCMSPI_ANDROID */
+
+	return SDIOH_API_RC_SUCCESS;
+}
+
+/* Protect against reentrancy (disable device interrupts while executing) */
+void
+spi_lock(sdioh_info_t *sd)
+{
+#ifndef BCMSPI_ANDROID
+	ulong flags;
+	struct sdos_info *sdos;
+
+	sdos = (struct sdos_info *)sd->sdos_info;
+	ASSERT(sdos);
+
+	sd_trace(("%s: %d\n", __FUNCTION__, sd->lockcount));
+
+	spin_lock_irqsave(&sdos->lock, flags);
+	if (sd->lockcount) {
+		sd_err(("%s: Already locked!\n", __FUNCTION__));
+		ASSERT(sd->lockcount == 0);
+	}
+	spi_devintr_off(sd);
+	sd->lockcount++;
+	spin_unlock_irqrestore(&sdos->lock, flags);
+#endif /* !BCMSPI_ANDROID */
+}
+
+/* Enable client interrupt */
+void
+spi_unlock(sdioh_info_t *sd)
+{
+#ifndef BCMSPI_ANDROID
+	ulong flags;
+	struct sdos_info *sdos;
+
+	sd_trace(("%s: %d, %d\n", __FUNCTION__, sd->lockcount, sd->client_intr_enabled));
+	ASSERT(sd->lockcount > 0);
+
+	sdos = (struct sdos_info *)sd->sdos_info;
+	ASSERT(sdos);
+
+	spin_lock_irqsave(&sdos->lock, flags);
+	if (--sd->lockcount == 0 && sd->client_intr_enabled) {
+		spi_devintr_on(sd);
+	}
+	spin_unlock_irqrestore(&sdos->lock, flags);
+#endif /* !BCMSPI_ANDROID */
+}
+
+#ifndef BCMSPI_ANDROID
+void spi_waitbits(sdioh_info_t *sd, bool yield)
+{
+#ifndef BCMSDYIELD
+	ASSERT(!yield);
+#endif
+	sd_trace(("%s: yield %d canblock %d\n",
+	          __FUNCTION__, yield, BLOCKABLE()));
+
+	/* Clear the "interrupt happened" flag and last intrstatus */
+	sd->got_hcint = FALSE;
+
+#ifdef BCMSDYIELD
+	if (yield && BLOCKABLE()) {
+		struct sdos_info *sdos;
+		sdos = (struct sdos_info *)sd->sdos_info;
+		/* Wait for the indication, the interrupt will be masked when the ISR fires. */
+		wait_event_interruptible(sdos->intr_wait_queue, (sd->got_hcint));
+	} else
+#endif /* BCMSDYIELD */
+	{
+		spi_spinbits(sd);
+	}
+
+}
+#else /* !BCMSPI_ANDROID */
+int bcmgspi_dump = 0;		/* Set to dump complete trace of all SPI bus transactions */
+
+static void
+hexdump(char *pfx, unsigned char *msg, int msglen)
+{
+	int i, col;
+	char buf[80];
+
+	ASSERT(strlen(pfx) + 49 <= sizeof(buf));
+
+	col = 0;
+
+	for (i = 0; i < msglen; i++, col++) {
+		if (col % 16 == 0)
+			strcpy(buf, pfx);
+		sprintf(buf + strlen(buf), "%02x", msg[i]);
+		if ((col + 1) % 16 == 0)
+			printf("%s\n", buf);
+		else
+			sprintf(buf + strlen(buf), " ");
+	}
+
+	if (col % 16 != 0)
+		printf("%s\n", buf);
+}
+
+/* Send/Receive an SPI Packet */
+void
+spi_sendrecv(sdioh_info_t *sd, uint8 *msg_out, uint8 *msg_in, int msglen)
+{
+	int write = 0;
+	int tx_len = 0;
+	struct spi_message msg;
+	struct spi_transfer t[2];
+
+	spi_message_init(&msg);
+	memset(t, 0, 2*sizeof(struct spi_transfer));
+
+	if (sd->wordlen == 2)
+#if !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW))
+		write = msg_out[2] & 0x80;
+#else
+		write = msg_out[1] & 0x80;
+#endif /* !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW)) */
+	if (sd->wordlen == 4)
+#if !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW))
+		write = msg_out[0] & 0x80;
+#else
+		write = msg_out[3] & 0x80;
+#endif /* !(defined(SPI_PIO_RW_BIGENDIAN) && defined(SPI_PIO_32BIT_RW)) */
+
+	if (bcmgspi_dump) {
+		hexdump(" OUT: ", msg_out, msglen);
+	}
+
+	tx_len = write ? msglen-4 : 4;
+
+	sd_trace(("spi_sendrecv: %s, wordlen %d, cmd : 0x%02x 0x%02x 0x%02x 0x%02x\n",
+		write ? "WR" : "RD", sd->wordlen,
+		msg_out[0], msg_out[1], msg_out[2], msg_out[3]));
+
+	t[0].tx_buf = (char *)&msg_out[0];
+	t[0].rx_buf = 0;
+	t[0].len = tx_len;
+
+	spi_message_add_tail(&t[0], &msg);
+
+	t[1].rx_buf = (char *)&msg_in[tx_len];
+	t[1].tx_buf = 0;
+	t[1].len = msglen-tx_len;
+
+	spi_message_add_tail(&t[1], &msg);
+	spi_sync(gBCMSPI, &msg);
+
+	if (bcmgspi_dump) {
+		hexdump(" IN  : ", msg_in, msglen);
+	}
+}
+#endif /* !BCMSPI_ANDROID */