[mirror_ubuntu-artful-kernel.git] / drivers / net / wireless / brcm80211 / brcmfmac / bcmsdh.c

/*
 * Copyright (c) 2010 Broadcom Corporation
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
/* ****************** SDIO CARD Interface Functions **************************/

#include <linux/types.h>
#include <linux/netdevice.h>
#include <linux/export.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/sched.h>
#include <linux/completion.h>
#include <linux/mmc/sdio.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/card.h>
#include <linux/platform_data/brcmfmac-sdio.h>

#include <defs.h>
#include <brcm_hw_ids.h>
#include <brcmu_utils.h>
#include <brcmu_wifi.h>
#include <soc.h>
#include "dhd_bus.h"
#include "dhd_dbg.h"
#include "sdio_host.h"

#define SDIOH_API_ACCESS_RETRY_LIMIT	2


static irqreturn_t brcmf_sdio_oob_irqhandler(int irq, void *dev_id)
{
	struct brcmf_bus *bus_if = dev_get_drvdata(dev_id);
	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;

	brcmf_dbg(INTR, "OOB intr triggered\n");

	/* out-of-band interrupt is level-triggered which won't
	 * be cleared until dpc
	 */
	if (sdiodev->irq_en) {
		disable_irq_nosync(irq);
		sdiodev->irq_en = false;
	}

	brcmf_sdbrcm_isr(sdiodev->bus);

	return IRQ_HANDLED;
}

static void brcmf_sdio_ib_irqhandler(struct sdio_func *func)
{
	struct brcmf_bus *bus_if = dev_get_drvdata(&func->dev);
	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;

	brcmf_dbg(INTR, "IB intr triggered\n");

	brcmf_sdbrcm_isr(sdiodev->bus);
}

/* dummy handler for SDIO function 2 interrupt */
static void brcmf_sdio_dummy_irqhandler(struct sdio_func *func)
{
}

int brcmf_sdio_intr_register(struct brcmf_sdio_dev *sdiodev)
{
	int ret = 0;
	u8 data;
	unsigned long flags;

	if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
		brcmf_dbg(SDIO, "Enter, register OOB IRQ %d\n",
			  sdiodev->pdata->oob_irq_nr);
		ret = request_irq(sdiodev->pdata->oob_irq_nr,
				  brcmf_sdio_oob_irqhandler,
				  sdiodev->pdata->oob_irq_flags,
				  "brcmf_oob_intr",
				  &sdiodev->func[1]->dev);
		if (ret != 0) {
			brcmf_err("request_irq failed %d\n", ret);
			return ret;
		}
		sdiodev->oob_irq_requested = true;
		spin_lock_init(&sdiodev->irq_en_lock);
		spin_lock_irqsave(&sdiodev->irq_en_lock, flags);
		sdiodev->irq_en = true;
		spin_unlock_irqrestore(&sdiodev->irq_en_lock, flags);

		ret = enable_irq_wake(sdiodev->pdata->oob_irq_nr);
		if (ret != 0) {
			brcmf_err("enable_irq_wake failed %d\n", ret);
			return ret;
		}
		sdiodev->irq_wake = true;

		sdio_claim_host(sdiodev->func[1]);

		/* must configure SDIO_CCCR_IENx to enable irq */
		data = brcmf_sdio_regrb(sdiodev, SDIO_CCCR_IENx, &ret);
		data |= 1 << SDIO_FUNC_1 | 1 << SDIO_FUNC_2 | 1;
		brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, data, &ret);

		/* redirect, configure and enable io for interrupt signal */
		data = SDIO_SEPINT_MASK | SDIO_SEPINT_OE;
		if (sdiodev->pdata->oob_irq_flags & IRQF_TRIGGER_HIGH)
			data |= SDIO_SEPINT_ACT_HI;
		brcmf_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, data, &ret);

		sdio_release_host(sdiodev->func[1]);
	} else {
		brcmf_dbg(SDIO, "Entering\n");
		sdio_claim_host(sdiodev->func[1]);
		sdio_claim_irq(sdiodev->func[1], brcmf_sdio_ib_irqhandler);
		sdio_claim_irq(sdiodev->func[2], brcmf_sdio_dummy_irqhandler);
		sdio_release_host(sdiodev->func[1]);
	}

	return 0;
}

int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev *sdiodev)
{
	brcmf_dbg(SDIO, "Entering\n");

	if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
		sdio_claim_host(sdiodev->func[1]);
		brcmf_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL);
		brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, 0, NULL);
		sdio_release_host(sdiodev->func[1]);

		if (sdiodev->oob_irq_requested) {
			sdiodev->oob_irq_requested = false;
			if (sdiodev->irq_wake) {
				disable_irq_wake(sdiodev->pdata->oob_irq_nr);
				sdiodev->irq_wake = false;
			}
			free_irq(sdiodev->pdata->oob_irq_nr,
				 &sdiodev->func[1]->dev);
			sdiodev->irq_en = false;
		}
	} else {
		sdio_claim_host(sdiodev->func[1]);
		sdio_release_irq(sdiodev->func[2]);
		sdio_release_irq(sdiodev->func[1]);
		sdio_release_host(sdiodev->func[1]);
	}

	return 0;
}

int
brcmf_sdcard_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
{
	int err = 0, i;
	u8 addr[3];
	s32 retry;

	addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
	addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
	addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;

	for (i = 0; i < 3; i++) {
		retry = 0;
		do {
			if (retry)
				usleep_range(1000, 2000);
			err = brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE,
					SDIO_FUNC_1, SBSDIO_FUNC1_SBADDRLOW + i,
					&addr[i]);
		} while (err != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);

		if (err) {
			brcmf_err("failed at addr:0x%0x\n",
				  SBSDIO_FUNC1_SBADDRLOW + i);
			break;
		}
	}

	return err;
}

int
brcmf_sdio_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
			void *data, bool write)
{
	u8 func_num, reg_size;
	u32 bar;
	s32 retry = 0;
	int ret;

	/*
	 * figure out how to read the register based on address range
	 * 0x00 ~ 0x7FF: function 0 CCCR and FBR
	 * 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
	 * The rest: function 1 silicon backplane core registers
	 */
	if ((addr & ~REG_F0_REG_MASK) == 0) {
		func_num = SDIO_FUNC_0;
		reg_size = 1;
	} else if ((addr & ~REG_F1_MISC_MASK) == 0) {
		func_num = SDIO_FUNC_1;
		reg_size = 1;
	} else {
		func_num = SDIO_FUNC_1;
		reg_size = 4;

		/* Set the window for SB core register */
		bar = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
		if (bar != sdiodev->sbwad) {
			ret = brcmf_sdcard_set_sbaddr_window(sdiodev, bar);
			if (ret != 0) {
				memset(data, 0xFF, reg_size);
				return ret;
			}
			sdiodev->sbwad = bar;
		}
		addr &= SBSDIO_SB_OFT_ADDR_MASK;
		addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;
	}

	do {
		if (!write)
			memset(data, 0, reg_size);
		if (retry)	/* wait for 1 ms till bus get settled down */
			usleep_range(1000, 2000);
		if (reg_size == 1)
			ret = brcmf_sdioh_request_byte(sdiodev, write,
						       func_num, addr, data);
		else
			ret = brcmf_sdioh_request_word(sdiodev, write,
						       func_num, addr, data, 4);
	} while (ret != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);

	if (ret != 0)
		brcmf_err("failed with %d\n", ret);

	return ret;
}

u8 brcmf_sdio_regrb(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
{
	u8 data;
	int retval;

	brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
	retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
	brcmf_dbg(SDIO, "data:0x%02x\n", data);

	if (ret)
		*ret = retval;

	return data;
}

u32 brcmf_sdio_regrl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret)
{
	u32 data;
	int retval;

	brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
	retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
	brcmf_dbg(SDIO, "data:0x%08x\n", data);

	if (ret)
		*ret = retval;

	return data;
}

void brcmf_sdio_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
		      u8 data, int *ret)
{
	int retval;

	brcmf_dbg(SDIO, "addr:0x%08x, data:0x%02x\n", addr, data);
	retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);

	if (ret)
		*ret = retval;
}

void brcmf_sdio_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
		      u32 data, int *ret)
{
	int retval;

	brcmf_dbg(SDIO, "addr:0x%08x, data:0x%08x\n", addr, data);
	retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);

	if (ret)
		*ret = retval;
}

static int brcmf_sdcard_recv_prepare(struct brcmf_sdio_dev *sdiodev, uint fn,
				     uint flags, uint width, u32 *addr)
{
	uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
	int err = 0;

	/* Async not implemented yet */
	if (flags & SDIO_REQ_ASYNC)
		return -ENOTSUPP;

	if (bar0 != sdiodev->sbwad) {
		err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
		if (err)
			return err;

		sdiodev->sbwad = bar0;
	}

	*addr &= SBSDIO_SB_OFT_ADDR_MASK;

	if (width == 4)
		*addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;

	return 0;
}

int
brcmf_sdcard_recv_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
		      uint flags, u8 *buf, uint nbytes)
{
	struct sk_buff *mypkt;
	int err;

	mypkt = brcmu_pkt_buf_get_skb(nbytes);
	if (!mypkt) {
		brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
			  nbytes);
		return -EIO;
	}

	err = brcmf_sdcard_recv_pkt(sdiodev, addr, fn, flags, mypkt);
	if (!err)
		memcpy(buf, mypkt->data, nbytes);

	brcmu_pkt_buf_free_skb(mypkt);
	return err;
}

int
brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
		      uint flags, struct sk_buff *pkt)
{
	uint incr_fix;
	uint width;
	int err = 0;

	brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
		  fn, addr, pkt->len);

	width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
	err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
	if (err)
		goto done;

	incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
	err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_READ,
					 fn, addr, pkt);

done:
	return err;
}

int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
			    uint flags, struct sk_buff_head *pktq)
{
	uint incr_fix;
	uint width;
	int err = 0;

	brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
		  fn, addr, pktq->qlen);

	width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
	err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
	if (err)
		goto done;

	incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
	err = brcmf_sdioh_request_chain(sdiodev, incr_fix, SDIOH_READ, fn, addr,
					pktq);

done:
	return err;
}

int
brcmf_sdcard_send_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
		      uint flags, u8 *buf, uint nbytes)
{
	struct sk_buff *mypkt;
	int err;

	mypkt = brcmu_pkt_buf_get_skb(nbytes);
	if (!mypkt) {
		brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
			  nbytes);
		return -EIO;
	}

	memcpy(mypkt->data, buf, nbytes);
	err = brcmf_sdcard_send_pkt(sdiodev, addr, fn, flags, mypkt);

	brcmu_pkt_buf_free_skb(mypkt);
	return err;

}

int
brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
		      uint flags, struct sk_buff *pkt)
{
	uint incr_fix;
	uint width;
	uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
	int err = 0;

	brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
		  fn, addr, pkt->len);

	/* Async not implemented yet */
	if (flags & SDIO_REQ_ASYNC)
		return -ENOTSUPP;

	if (bar0 != sdiodev->sbwad) {
		err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
		if (err)
			goto done;

		sdiodev->sbwad = bar0;
	}

	addr &= SBSDIO_SB_OFT_ADDR_MASK;

	incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
	width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
	if (width == 4)
		addr |= SBSDIO_SB_ACCESS_2_4B_FLAG;

	err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_WRITE, fn,
					 addr, pkt);

done:
	return err;
}

int
brcmf_sdio_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
		 u8 *data, uint size)
{
	int bcmerror = 0;
	struct sk_buff *pkt;
	u32 sdaddr;
	uint dsize;

	dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
	pkt = dev_alloc_skb(dsize);
	if (!pkt) {
		brcmf_err("dev_alloc_skb failed: len %d\n", dsize);
		return -EIO;
	}
	pkt->priority = 0;

	/* Determine initial transfer parameters */
	sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
	if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK)
		dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr);
	else
		dsize = size;

	sdio_claim_host(sdiodev->func[1]);

	/* Do the transfer(s) */
	while (size) {
		/* Set the backplane window to include the start address */
		bcmerror = brcmf_sdcard_set_sbaddr_window(sdiodev, address);
		if (bcmerror)
			break;

		brcmf_dbg(SDIO, "%s %d bytes at offset 0x%08x in window 0x%08x\n",
			  write ? "write" : "read", dsize,
			  sdaddr, address & SBSDIO_SBWINDOW_MASK);

		sdaddr &= SBSDIO_SB_OFT_ADDR_MASK;
		sdaddr |= SBSDIO_SB_ACCESS_2_4B_FLAG;

		skb_put(pkt, dsize);
		if (write)
			memcpy(pkt->data, data, dsize);
		bcmerror = brcmf_sdioh_request_buffer(sdiodev, SDIOH_DATA_INC,
						      write, SDIO_FUNC_1,
						      sdaddr, pkt);
		if (bcmerror) {
			brcmf_err("membytes transfer failed\n");
			break;
		}
		if (!write)
			memcpy(data, pkt->data, dsize);
		skb_trim(pkt, dsize);

		/* Adjust for next transfer (if any) */
		size -= dsize;
		if (size) {
			data += dsize;
			address += dsize;
			sdaddr = 0;
			dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
		}
	}

	dev_kfree_skb(pkt);

	/* Return the window to backplane enumeration space for core access */
	if (brcmf_sdcard_set_sbaddr_window(sdiodev, sdiodev->sbwad))
		brcmf_err("FAILED to set window back to 0x%x\n",
			  sdiodev->sbwad);

	sdio_release_host(sdiodev->func[1]);

	return bcmerror;
}

int brcmf_sdcard_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
{
	char t_func = (char)fn;
	brcmf_dbg(SDIO, "Enter\n");

	/* issue abort cmd52 command through F0 */
	brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE, SDIO_FUNC_0,
				 SDIO_CCCR_ABORT, &t_func);

	brcmf_dbg(SDIO, "Exit\n");
	return 0;
}

int brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
{
	u32 regs = 0;
	int ret = 0;

	ret = brcmf_sdioh_attach(sdiodev);
	if (ret)
		goto out;

	regs = SI_ENUM_BASE;

	/* try to attach to the target device */
	sdiodev->bus = brcmf_sdbrcm_probe(regs, sdiodev);
	if (!sdiodev->bus) {
		brcmf_err("device attach failed\n");
		ret = -ENODEV;
		goto out;
	}

out:
	if (ret)
		brcmf_sdio_remove(sdiodev);

	return ret;
}
EXPORT_SYMBOL(brcmf_sdio_probe);

int brcmf_sdio_remove(struct brcmf_sdio_dev *sdiodev)
{
	sdiodev->bus_if->state = BRCMF_BUS_DOWN;

	if (sdiodev->bus) {
		brcmf_sdbrcm_disconnect(sdiodev->bus);
		sdiodev->bus = NULL;
	}

	brcmf_sdioh_detach(sdiodev);

	sdiodev->sbwad = 0;

	return 0;
}
EXPORT_SYMBOL(brcmf_sdio_remove);

void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev *sdiodev, bool enable)
{
	if (enable)
		brcmf_sdbrcm_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
	else
		brcmf_sdbrcm_wd_timer(sdiodev->bus, 0);
}
Commit	Line	Data
5b435de0 AS	1	/*
	2	* Copyright (c) 2010 Broadcom Corporation
	3	*
	4	* Permission to use, copy, modify, and/or distribute this software for any
	5	* purpose with or without fee is hereby granted, provided that the above
	6	* copyright notice and this permission notice appear in all copies.
	7	*
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	9	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	10	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
	11	* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	12	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
	13	* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
	14	* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	15	*/
	16	/* **************** SDIO CARD Interface Functions ************************/
	17
	18	#include <linux/types.h>
	19	#include <linux/netdevice.h>
ee40fa06	20	#include <linux/export.h>
5b435de0 AS	21	#include <linux/pci.h>
	22	#include <linux/pci_ids.h>
	23	#include <linux/sched.h>
	24	#include <linux/completion.h>
	25	#include <linux/mmc/sdio.h>
	26	#include <linux/mmc/sdio_func.h>
	27	#include <linux/mmc/card.h>
668761ac	28	#include <linux/platform_data/brcmfmac-sdio.h>
5b435de0 AS	29
	30	#include <defs.h>
	31	#include <brcm_hw_ids.h>
	32	#include <brcmu_utils.h>
	33	#include <brcmu_wifi.h>
	34	#include <soc.h>
5b435de0 AS	35	#include "dhd_bus.h"
	36	#include "dhd_dbg.h"
	37	#include "sdio_host.h"
	38
	39	#define SDIOH_API_ACCESS_RETRY_LIMIT 2
	40
668761ac HM	41
668761ac HM	42	static irqreturn_t brcmf_sdio_oob_irqhandler(int irq, void *dev_id)
ba89bf19	43	{
5b3c1832 HM	44	struct brcmf_bus *bus_if = dev_get_drvdata(dev_id);
5b3c1832 HM	45	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
ba89bf19	46
668761ac	47	brcmf_dbg(INTR, "OOB intr triggered\n");
ba89bf19	48
668761ac	49	/* out-of-band interrupt is level-triggered which won't
ba89bf19 FL	50	* be cleared until dpc
	51	*/
	52	if (sdiodev->irq_en) {
	53	disable_irq_nosync(irq);
	54	sdiodev->irq_en = false;
	55	}
	56
	57	brcmf_sdbrcm_isr(sdiodev->bus);
	58
	59	return IRQ_HANDLED;
	60	}
	61
668761ac	62	static void brcmf_sdio_ib_irqhandler(struct sdio_func *func)
5b435de0	63	{
5b3c1832 HM	64	struct brcmf_bus *bus_if = dev_get_drvdata(&func->dev);
5b3c1832 HM	65	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
5b435de0	66
668761ac	67	brcmf_dbg(INTR, "IB intr triggered\n");
5b435de0	68
5b435de0	69	brcmf_sdbrcm_isr(sdiodev->bus);
5b435de0 AS	70	}
5b435de0 AS	71
fbf59108	72	/* dummy handler for SDIO function 2 interrupt */
ba89bf19	73	static void brcmf_sdio_dummy_irqhandler(struct sdio_func *func)
fbf59108 FL	74	{
	75	}
	76
ba89bf19	77	int brcmf_sdio_intr_register(struct brcmf_sdio_dev *sdiodev)
5b435de0	78	{
668761ac HM	79	int ret = 0;
	80	u8 data;
	81	unsigned long flags;
5b435de0	82
668761ac HM	83	if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
	84	brcmf_dbg(SDIO, "Enter, register OOB IRQ %d\n",
	85	sdiodev->pdata->oob_irq_nr);
	86	ret = request_irq(sdiodev->pdata->oob_irq_nr,
	87	brcmf_sdio_oob_irqhandler,
	88	sdiodev->pdata->oob_irq_flags,
	89	"brcmf_oob_intr",
	90	&sdiodev->func[1]->dev);
	91	if (ret != 0) {
	92	brcmf_err("request_irq failed %d\n", ret);
	93	return ret;
	94	}
	95	sdiodev->oob_irq_requested = true;
	96	spin_lock_init(&sdiodev->irq_en_lock);
	97	spin_lock_irqsave(&sdiodev->irq_en_lock, flags);
	98	sdiodev->irq_en = true;
	99	spin_unlock_irqrestore(&sdiodev->irq_en_lock, flags);
	100
	101	ret = enable_irq_wake(sdiodev->pdata->oob_irq_nr);
	102	if (ret != 0) {
	103	brcmf_err("enable_irq_wake failed %d\n", ret);
	104	return ret;
	105	}
	106	sdiodev->irq_wake = true;
	107
	108	sdio_claim_host(sdiodev->func[1]);
	109
	110	/* must configure SDIO_CCCR_IENx to enable irq */
	111	data = brcmf_sdio_regrb(sdiodev, SDIO_CCCR_IENx, &ret);
	112	data \|= 1 << SDIO_FUNC_1 \| 1 << SDIO_FUNC_2 \| 1;
	113	brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, data, &ret);
	114
	115	/* redirect, configure and enable io for interrupt signal */
	116	data = SDIO_SEPINT_MASK \| SDIO_SEPINT_OE;
	117	if (sdiodev->pdata->oob_irq_flags & IRQF_TRIGGER_HIGH)
	118	data \|= SDIO_SEPINT_ACT_HI;
	119	brcmf_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, data, &ret);
	120
	121	sdio_release_host(sdiodev->func[1]);
	122	} else {
	123	brcmf_dbg(SDIO, "Entering\n");
	124	sdio_claim_host(sdiodev->func[1]);
	125	sdio_claim_irq(sdiodev->func[1], brcmf_sdio_ib_irqhandler);
	126	sdio_claim_irq(sdiodev->func[2], brcmf_sdio_dummy_irqhandler);
	127	sdio_release_host(sdiodev->func[1]);
	128	}
5b435de0 AS	129
	130	return 0;
	131	}
	132
ba89bf19	133	int brcmf_sdio_intr_unregister(struct brcmf_sdio_dev *sdiodev)
5b435de0	134	{
c3203374	135	brcmf_dbg(SDIO, "Entering\n");
5b435de0	136
668761ac HM	137	if ((sdiodev->pdata) && (sdiodev->pdata->oob_irq_supported)) {
	138	sdio_claim_host(sdiodev->func[1]);
	139	brcmf_sdio_regwb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL);
	140	brcmf_sdio_regwb(sdiodev, SDIO_CCCR_IENx, 0, NULL);
	141	sdio_release_host(sdiodev->func[1]);
	142
	143	if (sdiodev->oob_irq_requested) {
	144	sdiodev->oob_irq_requested = false;
	145	if (sdiodev->irq_wake) {
	146	disable_irq_wake(sdiodev->pdata->oob_irq_nr);
	147	sdiodev->irq_wake = false;
	148	}
	149	free_irq(sdiodev->pdata->oob_irq_nr,
	150	&sdiodev->func[1]->dev);
	151	sdiodev->irq_en = false;
	152	}
	153	} else {
	154	sdio_claim_host(sdiodev->func[1]);
	155	sdio_release_irq(sdiodev->func[2]);
	156	sdio_release_irq(sdiodev->func[1]);
	157	sdio_release_host(sdiodev->func[1]);
	158	}
5b435de0 AS	159
	160	return 0;
	161	}
	162
5b435de0 AS	163	int
	164	brcmf_sdcard_set_sbaddr_window(struct brcmf_sdio_dev *sdiodev, u32 address)
	165	{
7d9cfc28 FL	166	int err = 0, i;
	167	u8 addr[3];
	168	s32 retry;
	169
	170	addr[0] = (address >> 8) & SBSDIO_SBADDRLOW_MASK;
	171	addr[1] = (address >> 16) & SBSDIO_SBADDRMID_MASK;
	172	addr[2] = (address >> 24) & SBSDIO_SBADDRHIGH_MASK;
	173
	174	for (i = 0; i < 3; i++) {
	175	retry = 0;
	176	do {
	177	if (retry)
	178	usleep_range(1000, 2000);
	179	err = brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE,
	180	SDIO_FUNC_1, SBSDIO_FUNC1_SBADDRLOW + i,
	181	&addr[i]);
	182	} while (err != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
	183
	184	if (err) {
5e8149f5	185	brcmf_err("failed at addr:0x%0x\n",
7d9cfc28 FL	186	SBSDIO_FUNC1_SBADDRLOW + i);
	187	break;
	188	}
	189	}
5b435de0 AS	190
	191	return err;
	192	}
	193
4531603a	194	int
e9b8d91d FL	195	brcmf_sdio_regrw_helper(struct brcmf_sdio_dev *sdiodev, u32 addr,
	196	void *data, bool write)
	197	{
	198	u8 func_num, reg_size;
	199	u32 bar;
	200	s32 retry = 0;
	201	int ret;
	202
	203	/*
	204	* figure out how to read the register based on address range
d8b3fc59	205	* 0x00 ~ 0x7FF: function 0 CCCR and FBR
e9b8d91d FL	206	* 0x10000 ~ 0x1FFFF: function 1 miscellaneous registers
	207	* The rest: function 1 silicon backplane core registers
	208	*/
d8b3fc59	209	if ((addr & ~REG_F0_REG_MASK) == 0) {
e9b8d91d FL	210	func_num = SDIO_FUNC_0;
	211	reg_size = 1;
	212	} else if ((addr & ~REG_F1_MISC_MASK) == 0) {
	213	func_num = SDIO_FUNC_1;
	214	reg_size = 1;
	215	} else {
	216	func_num = SDIO_FUNC_1;
	217	reg_size = 4;
	218
	219	/* Set the window for SB core register */
	220	bar = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
	221	if (bar != sdiodev->sbwad) {
	222	ret = brcmf_sdcard_set_sbaddr_window(sdiodev, bar);
	223	if (ret != 0) {
	224	memset(data, 0xFF, reg_size);
	225	return ret;
	226	}
	227	sdiodev->sbwad = bar;
	228	}
	229	addr &= SBSDIO_SB_OFT_ADDR_MASK;
	230	addr \|= SBSDIO_SB_ACCESS_2_4B_FLAG;
	231	}
	232
	233	do {
	234	if (!write)
	235	memset(data, 0, reg_size);
	236	if (retry) /* wait for 1 ms till bus get settled down */
	237	usleep_range(1000, 2000);
	238	if (reg_size == 1)
	239	ret = brcmf_sdioh_request_byte(sdiodev, write,
	240	func_num, addr, data);
	241	else
	242	ret = brcmf_sdioh_request_word(sdiodev, write,
	243	func_num, addr, data, 4);
	244	} while (ret != 0 && retry++ < SDIOH_API_ACCESS_RETRY_LIMIT);
	245
5c15c23a	246	if (ret != 0)
5e8149f5	247	brcmf_err("failed with %d\n", ret);
e9b8d91d FL	248
	249	return ret;
	250	}
	251
	252	u8 brcmf_sdio_regrb(struct brcmf_sdio_dev sdiodev, u32 addr, int ret)
	253	{
	254	u8 data;
	255	int retval;
	256
c3203374	257	brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
e9b8d91d	258	retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
c3203374	259	brcmf_dbg(SDIO, "data:0x%02x\n", data);
e9b8d91d FL	260
	261	if (ret)
	262	*ret = retval;
	263
	264	return data;
	265	}
	266
	267	u32 brcmf_sdio_regrl(struct brcmf_sdio_dev sdiodev, u32 addr, int ret)
	268	{
	269	u32 data;
	270	int retval;
	271
c3203374	272	brcmf_dbg(SDIO, "addr:0x%08x\n", addr);
e9b8d91d	273	retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, false);
c3203374	274	brcmf_dbg(SDIO, "data:0x%08x\n", data);
e9b8d91d FL	275
	276	if (ret)
	277	*ret = retval;
	278
	279	return data;
	280	}
	281
	282	void brcmf_sdio_regwb(struct brcmf_sdio_dev *sdiodev, u32 addr,
	283	u8 data, int *ret)
	284	{
	285	int retval;
	286
c3203374	287	brcmf_dbg(SDIO, "addr:0x%08x, data:0x%02x\n", addr, data);
e9b8d91d FL	288	retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
	289
	290	if (ret)
	291	*ret = retval;
	292	}
	293
	294	void brcmf_sdio_regwl(struct brcmf_sdio_dev *sdiodev, u32 addr,
	295	u32 data, int *ret)
	296	{
	297	int retval;
	298
c3203374	299	brcmf_dbg(SDIO, "addr:0x%08x, data:0x%08x\n", addr, data);
e9b8d91d FL	300	retval = brcmf_sdio_regrw_helper(sdiodev, addr, &data, true);
	301
	302	if (ret)
	303	*ret = retval;
	304	}
	305
5adfeb63 AS	306	static int brcmf_sdcard_recv_prepare(struct brcmf_sdio_dev *sdiodev, uint fn,
5adfeb63 AS	307	uint flags, uint width, u32 *addr)
5b435de0	308	{
5adfeb63	309	uint bar0 = *addr & ~SBSDIO_SB_OFT_ADDR_MASK;
5b435de0 AS	310	int err = 0;
5b435de0 AS	311
5b435de0 AS	312	/* Async not implemented yet */
	313	if (flags & SDIO_REQ_ASYNC)
	314	return -ENOTSUPP;
	315
	316	if (bar0 != sdiodev->sbwad) {
	317	err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
	318	if (err)
	319	return err;
	320
	321	sdiodev->sbwad = bar0;
	322	}
	323
5adfeb63 AS	324	*addr &= SBSDIO_SB_OFT_ADDR_MASK;
	325
	326	if (width == 4)
	327	*addr \|= SBSDIO_SB_ACCESS_2_4B_FLAG;
	328
	329	return 0;
	330	}
	331
	332	int
	333	brcmf_sdcard_recv_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
	334	uint flags, u8 *buf, uint nbytes)
	335	{
	336	struct sk_buff *mypkt;
	337	int err;
	338
	339	mypkt = brcmu_pkt_buf_get_skb(nbytes);
	340	if (!mypkt) {
5e8149f5	341	brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
5adfeb63 AS	342	nbytes);
	343	return -EIO;
	344	}
	345
	346	err = brcmf_sdcard_recv_pkt(sdiodev, addr, fn, flags, mypkt);
	347	if (!err)
	348	memcpy(buf, mypkt->data, nbytes);
	349
	350	brcmu_pkt_buf_free_skb(mypkt);
	351	return err;
	352	}
	353
	354	int
	355	brcmf_sdcard_recv_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
	356	uint flags, struct sk_buff *pkt)
	357	{
	358	uint incr_fix;
	359	uint width;
	360	int err = 0;
	361
c3203374	362	brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
5adfeb63 AS	363	fn, addr, pkt->len);
	364
	365	width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
	366	err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
	367	if (err)
7057fd00	368	goto done;
5b435de0 AS	369
5b435de0 AS	370	incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
5adfeb63	371	err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_READ,
4c6e869d	372	fn, addr, pkt);
5adfeb63	373
7057fd00	374	done:
5adfeb63 AS	375	return err;
	376	}
	377
	378	int brcmf_sdcard_recv_chain(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
	379	uint flags, struct sk_buff_head *pktq)
	380	{
	381	uint incr_fix;
	382	uint width;
	383	int err = 0;
	384
c3203374	385	brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
5adfeb63 AS	386	fn, addr, pktq->qlen);
5adfeb63 AS	387
5b435de0	388	width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
5adfeb63 AS	389	err = brcmf_sdcard_recv_prepare(sdiodev, fn, flags, width, &addr);
5adfeb63 AS	390	if (err)
7057fd00	391	goto done;
5b435de0	392
5adfeb63 AS	393	incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
	394	err = brcmf_sdioh_request_chain(sdiodev, incr_fix, SDIOH_READ, fn, addr,
	395	pktq);
5b435de0	396
7057fd00	397	done:
5adfeb63	398	return err;
5b435de0 AS	399	}
	400
	401	int
	402	brcmf_sdcard_send_buf(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
5adfeb63 AS	403	uint flags, u8 *buf, uint nbytes)
	404	{
	405	struct sk_buff *mypkt;
	406	int err;
	407
	408	mypkt = brcmu_pkt_buf_get_skb(nbytes);
	409	if (!mypkt) {
5e8149f5	410	brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n",
5adfeb63 AS	411	nbytes);
	412	return -EIO;
	413	}
	414
	415	memcpy(mypkt->data, buf, nbytes);
	416	err = brcmf_sdcard_send_pkt(sdiodev, addr, fn, flags, mypkt);
	417
	418	brcmu_pkt_buf_free_skb(mypkt);
	419	return err;
	420
	421	}
	422
	423	int
	424	brcmf_sdcard_send_pkt(struct brcmf_sdio_dev *sdiodev, u32 addr, uint fn,
	425	uint flags, struct sk_buff *pkt)
5b435de0 AS	426	{
	427	uint incr_fix;
	428	uint width;
	429	uint bar0 = addr & ~SBSDIO_SB_OFT_ADDR_MASK;
	430	int err = 0;
	431
c3203374	432	brcmf_dbg(SDIO, "fun = %d, addr = 0x%x, size = %d\n",
5adfeb63	433	fn, addr, pkt->len);
5b435de0 AS	434
	435	/* Async not implemented yet */
	436	if (flags & SDIO_REQ_ASYNC)
	437	return -ENOTSUPP;
	438
	439	if (bar0 != sdiodev->sbwad) {
	440	err = brcmf_sdcard_set_sbaddr_window(sdiodev, bar0);
	441	if (err)
7057fd00	442	goto done;
5b435de0 AS	443
	444	sdiodev->sbwad = bar0;
	445	}
	446
	447	addr &= SBSDIO_SB_OFT_ADDR_MASK;
	448
	449	incr_fix = (flags & SDIO_REQ_FIXED) ? SDIOH_DATA_FIX : SDIOH_DATA_INC;
	450	width = (flags & SDIO_REQ_4BYTE) ? 4 : 2;
	451	if (width == 4)
	452	addr \|= SBSDIO_SB_ACCESS_2_4B_FLAG;
	453
7057fd00 FL	454	err = brcmf_sdioh_request_buffer(sdiodev, incr_fix, SDIOH_WRITE, fn,
	455	addr, pkt);
	456
	457	done:
7057fd00	458	return err;
5b435de0 AS	459	}
5b435de0 AS	460
ba540b01 FL	461	int
	462	brcmf_sdio_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address,
	463	u8 *data, uint size)
5b435de0	464	{
ba540b01 FL	465	int bcmerror = 0;
	466	struct sk_buff *pkt;
	467	u32 sdaddr;
	468	uint dsize;
	469
	470	dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
	471	pkt = dev_alloc_skb(dsize);
	472	if (!pkt) {
	473	brcmf_err("dev_alloc_skb failed: len %d\n", dsize);
	474	return -EIO;
	475	}
	476	pkt->priority = 0;
4c6e869d	477
ba540b01 FL	478	/* Determine initial transfer parameters */
	479	sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
	480	if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK)
	481	dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr);
	482	else
	483	dsize = size;
5b435de0	484
ba540b01 FL	485	sdio_claim_host(sdiodev->func[1]);
	486
	487	/* Do the transfer(s) */
	488	while (size) {
	489	/* Set the backplane window to include the start address */
	490	bcmerror = brcmf_sdcard_set_sbaddr_window(sdiodev, address);
	491	if (bcmerror)
	492	break;
	493
	494	brcmf_dbg(SDIO, "%s %d bytes at offset 0x%08x in window 0x%08x\n",
	495	write ? "write" : "read", dsize,
	496	sdaddr, address & SBSDIO_SBWINDOW_MASK);
	497
	498	sdaddr &= SBSDIO_SB_OFT_ADDR_MASK;
	499	sdaddr \|= SBSDIO_SB_ACCESS_2_4B_FLAG;
	500
	501	skb_put(pkt, dsize);
	502	if (write)
	503	memcpy(pkt->data, data, dsize);
	504	bcmerror = brcmf_sdioh_request_buffer(sdiodev, SDIOH_DATA_INC,
	505	write, SDIO_FUNC_1,
	506	sdaddr, pkt);
	507	if (bcmerror) {
	508	brcmf_err("membytes transfer failed\n");
	509	break;
	510	}
	511	if (!write)
	512	memcpy(data, pkt->data, dsize);
	513	skb_trim(pkt, dsize);
	514
	515	/* Adjust for next transfer (if any) */
	516	size -= dsize;
	517	if (size) {
	518	data += dsize;
	519	address += dsize;
	520	sdaddr = 0;
	521	dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
	522	}
4c6e869d AS	523	}
4c6e869d AS	524
ba540b01	525	dev_kfree_skb(pkt);
4c6e869d	526
ba540b01 FL	527	/* Return the window to backplane enumeration space for core access */
	528	if (brcmf_sdcard_set_sbaddr_window(sdiodev, sdiodev->sbwad))
	529	brcmf_err("FAILED to set window back to 0x%x\n",
	530	sdiodev->sbwad);
4c6e869d	531
ba540b01	532	sdio_release_host(sdiodev->func[1]);
4c6e869d	533
ba540b01	534	return bcmerror;
5b435de0 AS	535	}
	536
	537	int brcmf_sdcard_abort(struct brcmf_sdio_dev *sdiodev, uint fn)
	538	{
	539	char t_func = (char)fn;
c3203374	540	brcmf_dbg(SDIO, "Enter\n");
5b435de0 AS	541
	542	/* issue abort cmd52 command through F0 */
	543	brcmf_sdioh_request_byte(sdiodev, SDIOH_WRITE, SDIO_FUNC_0,
	544	SDIO_CCCR_ABORT, &t_func);
	545
c3203374	546	brcmf_dbg(SDIO, "Exit\n");
5b435de0 AS	547	return 0;
	548	}
	549
	550	int brcmf_sdio_probe(struct brcmf_sdio_dev *sdiodev)
	551	{
	552	u32 regs = 0;
	553	int ret = 0;
	554
	555	ret = brcmf_sdioh_attach(sdiodev);
	556	if (ret)
	557	goto out;
	558
	559	regs = SI_ENUM_BASE;
	560
5b435de0	561	/* try to attach to the target device */
4175b88b	562	sdiodev->bus = brcmf_sdbrcm_probe(regs, sdiodev);
5b435de0	563	if (!sdiodev->bus) {
5e8149f5	564	brcmf_err("device attach failed\n");
5b435de0 AS	565	ret = -ENODEV;
	566	goto out;
	567	}
	568
	569	out:
	570	if (ret)
	571	brcmf_sdio_remove(sdiodev);
	572
	573	return ret;
	574	}
	575	EXPORT_SYMBOL(brcmf_sdio_probe);
	576
	577	int brcmf_sdio_remove(struct brcmf_sdio_dev *sdiodev)
	578	{
2def5c10 HM	579	sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2def5c10 HM	580
5b435de0 AS	581	if (sdiodev->bus) {
	582	brcmf_sdbrcm_disconnect(sdiodev->bus);
	583	sdiodev->bus = NULL;
	584	}
	585
	586	brcmf_sdioh_detach(sdiodev);
	587
	588	sdiodev->sbwad = 0;
	589
	590	return 0;
	591	}
	592	EXPORT_SYMBOL(brcmf_sdio_remove);
	593
	594	void brcmf_sdio_wdtmr_enable(struct brcmf_sdio_dev *sdiodev, bool enable)
	595	{
	596	if (enable)
	597	brcmf_sdbrcm_wd_timer(sdiodev->bus, BRCMF_WD_POLL_MS);
	598	else
	599	brcmf_sdbrcm_wd_timer(sdiodev->bus, 0);
	600	}