[deliverable/linux.git] / drivers / net / wireless / brcm80211 / brcmfmac / bcmsdh_sdmmc.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.
 */

#include <linux/types.h>
#include <linux/netdevice.h>
#include <linux/mmc/sdio.h>
#include <linux/mmc/core.h>
#include <linux/mmc/sdio_func.h>
#include <linux/mmc/sdio_ids.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
#include <linux/suspend.h>
#include <linux/errno.h>
#include <linux/sched.h>	/* request_irq() */
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/platform_data/brcmfmac-sdio.h>
#include <net/cfg80211.h>

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

#define SDIO_VENDOR_ID_BROADCOM		0x02d0

#define DMA_ALIGN_MASK	0x03

#define SDIO_FUNC1_BLOCKSIZE		64
#define SDIO_FUNC2_BLOCKSIZE		512

/* devices we support, null terminated */
static const struct sdio_device_id brcmf_sdmmc_ids[] = {
	{SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43143)},
	{SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43241)},
	{SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)},
	{SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4330)},
	{SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4334)},
	{SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM,
		     SDIO_DEVICE_ID_BROADCOM_4335_4339)},
	{ /* end: all zeroes */ },
};
MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids);

static struct brcmfmac_sdio_platform_data *brcmfmac_sdio_pdata;


bool
brcmf_pm_resume_error(struct brcmf_sdio_dev *sdiodev)
{
	bool is_err = false;
#ifdef CONFIG_PM_SLEEP
	is_err = atomic_read(&sdiodev->suspend);
#endif
	return is_err;
}

void
brcmf_pm_resume_wait(struct brcmf_sdio_dev *sdiodev, wait_queue_head_t *wq)
{
#ifdef CONFIG_PM_SLEEP
	int retry = 0;
	while (atomic_read(&sdiodev->suspend) && retry++ != 30)
		wait_event_timeout(*wq, false, HZ/100);
#endif
}

static inline int brcmf_sdioh_f0_write_byte(struct brcmf_sdio_dev *sdiodev,
					    uint regaddr, u8 *byte)
{
	struct sdio_func *sdfunc = sdiodev->func[0];
	int err_ret;

	/*
	 * Can only directly write to some F0 registers.
	 * Handle F2 enable/disable and Abort command
	 * as a special case.
	 */
	if (regaddr == SDIO_CCCR_IOEx) {
		sdfunc = sdiodev->func[2];
		if (sdfunc) {
			if (*byte & SDIO_FUNC_ENABLE_2) {
				/* Enable Function 2 */
				err_ret = sdio_enable_func(sdfunc);
				if (err_ret)
					brcmf_err("enable F2 failed:%d\n",
						  err_ret);
			} else {
				/* Disable Function 2 */
				err_ret = sdio_disable_func(sdfunc);
				if (err_ret)
					brcmf_err("Disable F2 failed:%d\n",
						  err_ret);
			}
		}
	} else if ((regaddr == SDIO_CCCR_ABORT) ||
		   (regaddr == SDIO_CCCR_IENx)) {
		sdfunc = kmemdup(sdiodev->func[0], sizeof(struct sdio_func),
				 GFP_KERNEL);
		if (!sdfunc)
			return -ENOMEM;
		sdfunc->num = 0;
		sdio_writeb(sdfunc, *byte, regaddr, &err_ret);
		kfree(sdfunc);
	} else if (regaddr < 0xF0) {
		brcmf_err("F0 Wr:0x%02x: write disallowed\n", regaddr);
		err_ret = -EPERM;
	} else {
		sdio_f0_writeb(sdfunc, *byte, regaddr, &err_ret);
	}

	return err_ret;
}

int brcmf_sdioh_request_byte(struct brcmf_sdio_dev *sdiodev, uint rw, uint func,
			     uint regaddr, u8 *byte)
{
	int err_ret;

	brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x\n", rw, func, regaddr);

	brcmf_pm_resume_wait(sdiodev, &sdiodev->request_byte_wait);
	if (brcmf_pm_resume_error(sdiodev))
		return -EIO;

	if (rw && func == 0) {
		/* handle F0 separately */
		err_ret = brcmf_sdioh_f0_write_byte(sdiodev, regaddr, byte);
	} else {
		if (rw) /* CMD52 Write */
			sdio_writeb(sdiodev->func[func], *byte, regaddr,
				    &err_ret);
		else if (func == 0) {
			*byte = sdio_f0_readb(sdiodev->func[func], regaddr,
					      &err_ret);
		} else {
			*byte = sdio_readb(sdiodev->func[func], regaddr,
					   &err_ret);
		}
	}

	if (err_ret) {
		/*
		 * SleepCSR register access can fail when
		 * waking up the device so reduce this noise
		 * in the logs.
		 */
		if (regaddr != SBSDIO_FUNC1_SLEEPCSR)
			brcmf_err("Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n",
				  rw ? "write" : "read", func, regaddr, *byte,
				  err_ret);
		else
			brcmf_dbg(SDIO, "Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n",
				  rw ? "write" : "read", func, regaddr, *byte,
				  err_ret);
	}
	return err_ret;
}

int brcmf_sdioh_request_word(struct brcmf_sdio_dev *sdiodev,
			     uint rw, uint func, uint addr, u32 *word,
			     uint nbytes)
{
	int err_ret = -EIO;

	if (func == 0) {
		brcmf_err("Only CMD52 allowed to F0\n");
		return -EINVAL;
	}

	brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
		  rw, func, addr, nbytes);

	brcmf_pm_resume_wait(sdiodev, &sdiodev->request_word_wait);
	if (brcmf_pm_resume_error(sdiodev))
		return -EIO;

	if (rw) {		/* CMD52 Write */
		if (nbytes == 4)
			sdio_writel(sdiodev->func[func], *word, addr,
				    &err_ret);
		else if (nbytes == 2)
			sdio_writew(sdiodev->func[func], (*word & 0xFFFF),
				    addr, &err_ret);
		else
			brcmf_err("Invalid nbytes: %d\n", nbytes);
	} else {		/* CMD52 Read */
		if (nbytes == 4)
			*word = sdio_readl(sdiodev->func[func], addr, &err_ret);
		else if (nbytes == 2)
			*word = sdio_readw(sdiodev->func[func], addr,
					   &err_ret) & 0xFFFF;
		else
			brcmf_err("Invalid nbytes: %d\n", nbytes);
	}

	if (err_ret)
		brcmf_err("Failed to %s word, Err: 0x%08x\n",
			  rw ? "write" : "read", err_ret);

	return err_ret;
}

static int brcmf_sdioh_get_cisaddr(struct brcmf_sdio_dev *sdiodev, u32 regaddr)
{
	/* read 24 bits and return valid 17 bit addr */
	int i, ret;
	u32 scratch, regdata;
	__le32 scratch_le;
	u8 *ptr = (u8 *)&scratch_le;

	for (i = 0; i < 3; i++) {
		regdata = brcmf_sdio_regrl(sdiodev, regaddr, &ret);
		if (ret != 0)
			brcmf_err("Can't read!\n");

		*ptr++ = (u8) regdata;
		regaddr++;
	}

	/* Only the lower 17-bits are valid */
	scratch = le32_to_cpu(scratch_le);
	scratch &= 0x0001FFFF;
	return scratch;
}

static int brcmf_sdioh_enablefuncs(struct brcmf_sdio_dev *sdiodev)
{
	int err_ret;
	u32 fbraddr;
	u8 func;

	brcmf_dbg(SDIO, "\n");

	/* Get the Card's common CIS address */
	sdiodev->func_cis_ptr[0] = brcmf_sdioh_get_cisaddr(sdiodev,
							   SDIO_CCCR_CIS);
	brcmf_dbg(SDIO, "Card's Common CIS Ptr = 0x%x\n",
		  sdiodev->func_cis_ptr[0]);

	/* Get the Card's function CIS (for each function) */
	for (fbraddr = SDIO_FBR_BASE(1), func = 1;
	     func <= sdiodev->num_funcs; func++, fbraddr += SDIOD_FBR_SIZE) {
		sdiodev->func_cis_ptr[func] =
		    brcmf_sdioh_get_cisaddr(sdiodev, SDIO_FBR_CIS + fbraddr);
		brcmf_dbg(SDIO, "Function %d CIS Ptr = 0x%x\n",
			  func, sdiodev->func_cis_ptr[func]);
	}

	/* Enable Function 1 */
	err_ret = sdio_enable_func(sdiodev->func[1]);
	if (err_ret)
		brcmf_err("Failed to enable F1 Err: 0x%08x\n", err_ret);

	return false;
}

/*
 *	Public entry points & extern's
 */
int brcmf_sdioh_attach(struct brcmf_sdio_dev *sdiodev)
{
	int err_ret = 0;
	struct mmc_host *host;
	struct sdio_func *func;
	uint max_blocks;

	brcmf_dbg(SDIO, "\n");

	sdiodev->num_funcs = 2;

	sdio_claim_host(sdiodev->func[1]);

	err_ret = sdio_set_block_size(sdiodev->func[1], SDIO_FUNC1_BLOCKSIZE);
	if (err_ret) {
		brcmf_err("Failed to set F1 blocksize\n");
		goto out;
	}

	err_ret = sdio_set_block_size(sdiodev->func[2], SDIO_FUNC2_BLOCKSIZE);
	if (err_ret) {
		brcmf_err("Failed to set F2 blocksize\n");
		goto out;
	}

	brcmf_sdioh_enablefuncs(sdiodev);

	/*
	 * determine host related variables after brcmf_sdio_probe()
	 * as func->cur_blksize is properly set and F2 init has been
	 * completed successfully.
	 */
	func = sdiodev->func[2];
	host = func->card->host;
	sdiodev->sg_support = host->max_segs > 1;
	max_blocks = min_t(uint, host->max_blk_count, 511u);
	sdiodev->max_request_size = min_t(uint, host->max_req_size,
					  max_blocks * func->cur_blksize);
	sdiodev->max_segment_count = min_t(uint, host->max_segs,
					   SG_MAX_SINGLE_ALLOC);
	sdiodev->max_segment_size = host->max_seg_size;
out:
	sdio_release_host(sdiodev->func[1]);
	brcmf_dbg(SDIO, "Done\n");
	return err_ret;
}

void brcmf_sdioh_detach(struct brcmf_sdio_dev *sdiodev)
{
	brcmf_dbg(SDIO, "\n");

	/* Disable Function 2 */
	sdio_claim_host(sdiodev->func[2]);
	sdio_disable_func(sdiodev->func[2]);
	sdio_release_host(sdiodev->func[2]);

	/* Disable Function 1 */
	sdio_claim_host(sdiodev->func[1]);
	sdio_disable_func(sdiodev->func[1]);
	sdio_release_host(sdiodev->func[1]);

}

static int brcmf_ops_sdio_probe(struct sdio_func *func,
				const struct sdio_device_id *id)
{
	int err;
	struct brcmf_sdio_dev *sdiodev;
	struct brcmf_bus *bus_if;

	brcmf_dbg(SDIO, "Enter\n");
	brcmf_dbg(SDIO, "Class=%x\n", func->class);
	brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
	brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
	brcmf_dbg(SDIO, "Function#: %d\n", func->num);

	/* Consume func num 1 but dont do anything with it. */
	if (func->num == 1)
		return 0;

	/* Ignore anything but func 2 */
	if (func->num != 2)
		return -ENODEV;

	bus_if = kzalloc(sizeof(struct brcmf_bus), GFP_KERNEL);
	if (!bus_if)
		return -ENOMEM;
	sdiodev = kzalloc(sizeof(struct brcmf_sdio_dev), GFP_KERNEL);
	if (!sdiodev) {
		kfree(bus_if);
		return -ENOMEM;
	}

	sdiodev->func[0] = func->card->sdio_func[0];
	sdiodev->func[1] = func->card->sdio_func[0];
	sdiodev->func[2] = func;

	sdiodev->bus_if = bus_if;
	bus_if->bus_priv.sdio = sdiodev;
	dev_set_drvdata(&func->dev, bus_if);
	dev_set_drvdata(&sdiodev->func[1]->dev, bus_if);
	sdiodev->dev = &sdiodev->func[1]->dev;
	sdiodev->pdata = brcmfmac_sdio_pdata;

	atomic_set(&sdiodev->suspend, false);
	init_waitqueue_head(&sdiodev->request_byte_wait);
	init_waitqueue_head(&sdiodev->request_word_wait);
	init_waitqueue_head(&sdiodev->request_buffer_wait);

	brcmf_dbg(SDIO, "F2 found, calling brcmf_sdio_probe...\n");
	err = brcmf_sdio_probe(sdiodev);
	if (err) {
		brcmf_err("F2 error, probe failed %d...\n", err);
		goto fail;
	}

	brcmf_dbg(SDIO, "F2 init completed...\n");
	return 0;

fail:
	dev_set_drvdata(&func->dev, NULL);
	dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
	kfree(sdiodev);
	kfree(bus_if);
	return err;
}

static void brcmf_ops_sdio_remove(struct sdio_func *func)
{
	struct brcmf_bus *bus_if;
	struct brcmf_sdio_dev *sdiodev;

	brcmf_dbg(SDIO, "Enter\n");
	brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
	brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
	brcmf_dbg(SDIO, "Function: %d\n", func->num);

	if (func->num != 1 && func->num != 2)
		return;

	bus_if = dev_get_drvdata(&func->dev);
	if (bus_if) {
		sdiodev = bus_if->bus_priv.sdio;
		brcmf_sdio_remove(sdiodev);

		dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
		dev_set_drvdata(&sdiodev->func[2]->dev, NULL);

		kfree(bus_if);
		kfree(sdiodev);
	}

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

#ifdef CONFIG_PM_SLEEP
static int brcmf_sdio_suspend(struct device *dev)
{
	mmc_pm_flag_t sdio_flags;
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
	int ret = 0;

	brcmf_dbg(SDIO, "\n");

	atomic_set(&sdiodev->suspend, true);

	sdio_flags = sdio_get_host_pm_caps(sdiodev->func[1]);
	if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
		brcmf_err("Host can't keep power while suspended\n");
		return -EINVAL;
	}

	ret = sdio_set_host_pm_flags(sdiodev->func[1], MMC_PM_KEEP_POWER);
	if (ret) {
		brcmf_err("Failed to set pm_flags\n");
		return ret;
	}

	brcmf_sdio_wdtmr_enable(sdiodev, false);

	return ret;
}

static int brcmf_sdio_resume(struct device *dev)
{
	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;

	brcmf_sdio_wdtmr_enable(sdiodev, true);
	atomic_set(&sdiodev->suspend, false);
	return 0;
}

static const struct dev_pm_ops brcmf_sdio_pm_ops = {
	.suspend	= brcmf_sdio_suspend,
	.resume		= brcmf_sdio_resume,
};
#endif	/* CONFIG_PM_SLEEP */

static struct sdio_driver brcmf_sdmmc_driver = {
	.probe = brcmf_ops_sdio_probe,
	.remove = brcmf_ops_sdio_remove,
	.name = BRCMFMAC_SDIO_PDATA_NAME,
	.id_table = brcmf_sdmmc_ids,
#ifdef CONFIG_PM_SLEEP
	.drv = {
		.pm = &brcmf_sdio_pm_ops,
	},
#endif	/* CONFIG_PM_SLEEP */
};

static int brcmf_sdio_pd_probe(struct platform_device *pdev)
{
	brcmf_dbg(SDIO, "Enter\n");

	brcmfmac_sdio_pdata = dev_get_platdata(&pdev->dev);

	if (brcmfmac_sdio_pdata->power_on)
		brcmfmac_sdio_pdata->power_on();

	return 0;
}

static int brcmf_sdio_pd_remove(struct platform_device *pdev)
{
	brcmf_dbg(SDIO, "Enter\n");

	if (brcmfmac_sdio_pdata->power_off)
		brcmfmac_sdio_pdata->power_off();

	sdio_unregister_driver(&brcmf_sdmmc_driver);

	return 0;
}

static struct platform_driver brcmf_sdio_pd = {
	.remove		= brcmf_sdio_pd_remove,
	.driver		= {
		.name	= BRCMFMAC_SDIO_PDATA_NAME,
		.owner	= THIS_MODULE,
	}
};

void brcmf_sdio_register(void)
{
	int ret;

	ret = sdio_register_driver(&brcmf_sdmmc_driver);
	if (ret)
		brcmf_err("sdio_register_driver failed: %d\n", ret);
}

void brcmf_sdio_exit(void)
{
	brcmf_dbg(SDIO, "Enter\n");

	if (brcmfmac_sdio_pdata)
		platform_driver_unregister(&brcmf_sdio_pd);
	else
		sdio_unregister_driver(&brcmf_sdmmc_driver);
}

void __init brcmf_sdio_init(void)
{
	int ret;

	brcmf_dbg(SDIO, "Enter\n");

	ret = platform_driver_probe(&brcmf_sdio_pd, brcmf_sdio_pd_probe);
	if (ret == -ENODEV)
		brcmf_dbg(SDIO, "No platform data available.\n");
}
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	*/
02f77195	16
5b435de0 AS	17	#include <linux/types.h>
	18	#include <linux/netdevice.h>
	19	#include <linux/mmc/sdio.h>
	20	#include <linux/mmc/core.h>
	21	#include <linux/mmc/sdio_func.h>
	22	#include <linux/mmc/sdio_ids.h>
	23	#include <linux/mmc/card.h>
71201496	24	#include <linux/mmc/host.h>
5b435de0 AS	25	#include <linux/suspend.h>
	26	#include <linux/errno.h>
	27	#include <linux/sched.h> /* request_irq() */
b7a57e76	28	#include <linux/module.h>
ba89bf19	29	#include <linux/platform_device.h>
668761ac	30	#include <linux/platform_data/brcmfmac-sdio.h>
5b435de0 AS	31	#include <net/cfg80211.h>
	32
	33	#include <defs.h>
	34	#include <brcm_hw_ids.h>
	35	#include <brcmu_utils.h>
	36	#include <brcmu_wifi.h>
	37	#include "sdio_host.h"
fe040158	38	#include "sdio_chip.h"
5b435de0	39	#include "dhd_dbg.h"
a8a363ac	40	#include "dhd_bus.h"
5b435de0 AS	41
	42	#define SDIO_VENDOR_ID_BROADCOM 0x02d0
	43
	44	#define DMA_ALIGN_MASK 0x03
	45
5b435de0 AS	46	#define SDIO_FUNC1_BLOCKSIZE 64
	47	#define SDIO_FUNC2_BLOCKSIZE 512
	48
	49	/* devices we support, null terminated */
	50	static const struct sdio_device_id brcmf_sdmmc_ids[] = {
369508c5	51	{SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43143)},
4a1c02ce	52	{SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43241)},
5b435de0	53	{SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)},
ce2d7d7e	54	{SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4330)},
85a4a1c3	55	{SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4334)},
fe040158 FL	56	{SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM,
fe040158 FL	57	SDIO_DEVICE_ID_BROADCOM_4335_4339)},
5b435de0 AS	58	{ /* end: all zeroes */ },
	59	};
	60	MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids);
	61
668761ac HM	62	static struct brcmfmac_sdio_platform_data *brcmfmac_sdio_pdata;
668761ac HM	63
ba89bf19	64
78b3f1c5	65	bool
5b435de0 AS	66	brcmf_pm_resume_error(struct brcmf_sdio_dev *sdiodev)
	67	{
	68	bool is_err = false;
	69	#ifdef CONFIG_PM_SLEEP
	70	is_err = atomic_read(&sdiodev->suspend);
	71	#endif
	72	return is_err;
	73	}
	74
78b3f1c5	75	void
5b435de0 AS	76	brcmf_pm_resume_wait(struct brcmf_sdio_dev sdiodev, wait_queue_head_t wq)
	77	{
	78	#ifdef CONFIG_PM_SLEEP
	79	int retry = 0;
	80	while (atomic_read(&sdiodev->suspend) && retry++ != 30)
	81	wait_event_timeout(*wq, false, HZ/100);
	82	#endif
	83	}
	84
	85	static inline int brcmf_sdioh_f0_write_byte(struct brcmf_sdio_dev *sdiodev,
	86	uint regaddr, u8 *byte)
	87	{
	88	struct sdio_func *sdfunc = sdiodev->func[0];
	89	int err_ret;
	90
	91	/*
	92	* Can only directly write to some F0 registers.
	93	* Handle F2 enable/disable and Abort command
	94	* as a special case.
	95	*/
	96	if (regaddr == SDIO_CCCR_IOEx) {
	97	sdfunc = sdiodev->func[2];
	98	if (sdfunc) {
5b435de0 AS	99	if (*byte & SDIO_FUNC_ENABLE_2) {
	100	/* Enable Function 2 */
	101	err_ret = sdio_enable_func(sdfunc);
	102	if (err_ret)
5e8149f5	103	brcmf_err("enable F2 failed:%d\n",
5b435de0 AS	104	err_ret);
	105	} else {
	106	/* Disable Function 2 */
	107	err_ret = sdio_disable_func(sdfunc);
	108	if (err_ret)
5e8149f5	109	brcmf_err("Disable F2 failed:%d\n",
5b435de0 AS	110	err_ret);
5b435de0 AS	111	}
5b435de0	112	}
ba89bf19 FL	113	} else if ((regaddr == SDIO_CCCR_ABORT) \|\|
ba89bf19 FL	114	(regaddr == SDIO_CCCR_IENx)) {
1cc26990 FL	115	sdfunc = kmemdup(sdiodev->func[0], sizeof(struct sdio_func),
	116	GFP_KERNEL);
	117	if (!sdfunc)
	118	return -ENOMEM;
	119	sdfunc->num = 0;
5b435de0	120	sdio_writeb(sdfunc, *byte, regaddr, &err_ret);
1cc26990	121	kfree(sdfunc);
5b435de0	122	} else if (regaddr < 0xF0) {
5e8149f5	123	brcmf_err("F0 Wr:0x%02x: write disallowed\n", regaddr);
5b435de0 AS	124	err_ret = -EPERM;
5b435de0 AS	125	} else {
5b435de0	126	sdio_f0_writeb(sdfunc, *byte, regaddr, &err_ret);
5b435de0 AS	127	}
	128
	129	return err_ret;
	130	}
	131
	132	int brcmf_sdioh_request_byte(struct brcmf_sdio_dev *sdiodev, uint rw, uint func,
	133	uint regaddr, u8 *byte)
	134	{
	135	int err_ret;
	136
c3203374	137	brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x\n", rw, func, regaddr);
5b435de0 AS	138
	139	brcmf_pm_resume_wait(sdiodev, &sdiodev->request_byte_wait);
	140	if (brcmf_pm_resume_error(sdiodev))
	141	return -EIO;
	142
	143	if (rw && func == 0) {
	144	/* handle F0 separately */
	145	err_ret = brcmf_sdioh_f0_write_byte(sdiodev, regaddr, byte);
	146	} else {
5b435de0 AS	147	if (rw) /* CMD52 Write */
	148	sdio_writeb(sdiodev->func[func], *byte, regaddr,
	149	&err_ret);
	150	else if (func == 0) {
	151	*byte = sdio_f0_readb(sdiodev->func[func], regaddr,
	152	&err_ret);
	153	} else {
	154	*byte = sdio_readb(sdiodev->func[func], regaddr,
	155	&err_ret);
	156	}
5b435de0 AS	157	}
5b435de0 AS	158
b317d1d5 AS	159	if (err_ret) {
	160	/*
	161	* SleepCSR register access can fail when
	162	* waking up the device so reduce this noise
	163	* in the logs.
	164	*/
	165	if (regaddr != SBSDIO_FUNC1_SLEEPCSR)
	166	brcmf_err("Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n",
	167	rw ? "write" : "read", func, regaddr, *byte,
	168	err_ret);
	169	else
	170	brcmf_dbg(SDIO, "Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n",
	171	rw ? "write" : "read", func, regaddr, *byte,
	172	err_ret);
	173	}
5b435de0 AS	174	return err_ret;
	175	}
	176
	177	int brcmf_sdioh_request_word(struct brcmf_sdio_dev *sdiodev,
	178	uint rw, uint func, uint addr, u32 *word,
	179	uint nbytes)
	180	{
	181	int err_ret = -EIO;
	182
	183	if (func == 0) {
5e8149f5	184	brcmf_err("Only CMD52 allowed to F0\n");
5b435de0 AS	185	return -EINVAL;
	186	}
	187
c3203374	188	brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n",
5b435de0 AS	189	rw, func, addr, nbytes);
	190
	191	brcmf_pm_resume_wait(sdiodev, &sdiodev->request_word_wait);
	192	if (brcmf_pm_resume_error(sdiodev))
	193	return -EIO;
5b435de0 AS	194
	195	if (rw) { /* CMD52 Write */
	196	if (nbytes == 4)
	197	sdio_writel(sdiodev->func[func], *word, addr,
	198	&err_ret);
	199	else if (nbytes == 2)
	200	sdio_writew(sdiodev->func[func], (*word & 0xFFFF),
	201	addr, &err_ret);
	202	else
5e8149f5	203	brcmf_err("Invalid nbytes: %d\n", nbytes);
5b435de0 AS	204	} else { /* CMD52 Read */
	205	if (nbytes == 4)
	206	*word = sdio_readl(sdiodev->func[func], addr, &err_ret);
	207	else if (nbytes == 2)
	208	*word = sdio_readw(sdiodev->func[func], addr,
	209	&err_ret) & 0xFFFF;
	210	else
5e8149f5	211	brcmf_err("Invalid nbytes: %d\n", nbytes);
5b435de0 AS	212	}
5b435de0 AS	213
5b435de0	214	if (err_ret)
5e8149f5	215	brcmf_err("Failed to %s word, Err: 0x%08x\n",
5b435de0 AS	216	rw ? "write" : "read", err_ret);
	217
	218	return err_ret;
	219	}
	220
5b435de0 AS	221	static int brcmf_sdioh_get_cisaddr(struct brcmf_sdio_dev *sdiodev, u32 regaddr)
	222	{
	223	/* read 24 bits and return valid 17 bit addr */
d8b3fc59	224	int i, ret;
5b435de0 AS	225	u32 scratch, regdata;
	226	__le32 scratch_le;
	227	u8 ptr = (u8 )&scratch_le;
	228
	229	for (i = 0; i < 3; i++) {
d8b3fc59 FL	230	regdata = brcmf_sdio_regrl(sdiodev, regaddr, &ret);
d8b3fc59 FL	231	if (ret != 0)
5e8149f5	232	brcmf_err("Can't read!\n");
5b435de0 AS	233
	234	*ptr++ = (u8) regdata;
	235	regaddr++;
	236	}
	237
	238	/* Only the lower 17-bits are valid */
	239	scratch = le32_to_cpu(scratch_le);
	240	scratch &= 0x0001FFFF;
	241	return scratch;
	242	}
	243
	244	static int brcmf_sdioh_enablefuncs(struct brcmf_sdio_dev *sdiodev)
	245	{
	246	int err_ret;
	247	u32 fbraddr;
	248	u8 func;
	249
c3203374	250	brcmf_dbg(SDIO, "\n");
5b435de0 AS	251
	252	/* Get the Card's common CIS address */
	253	sdiodev->func_cis_ptr[0] = brcmf_sdioh_get_cisaddr(sdiodev,
	254	SDIO_CCCR_CIS);
c3203374	255	brcmf_dbg(SDIO, "Card's Common CIS Ptr = 0x%x\n",
5b435de0 AS	256	sdiodev->func_cis_ptr[0]);
	257
	258	/* Get the Card's function CIS (for each function) */
	259	for (fbraddr = SDIO_FBR_BASE(1), func = 1;
	260	func <= sdiodev->num_funcs; func++, fbraddr += SDIOD_FBR_SIZE) {
	261	sdiodev->func_cis_ptr[func] =
	262	brcmf_sdioh_get_cisaddr(sdiodev, SDIO_FBR_CIS + fbraddr);
c3203374	263	brcmf_dbg(SDIO, "Function %d CIS Ptr = 0x%x\n",
5b435de0 AS	264	func, sdiodev->func_cis_ptr[func]);
	265	}
	266
	267	/* Enable Function 1 */
5b435de0	268	err_ret = sdio_enable_func(sdiodev->func[1]);
5b435de0	269	if (err_ret)
5e8149f5	270	brcmf_err("Failed to enable F1 Err: 0x%08x\n", err_ret);
5b435de0 AS	271
	272	return false;
	273	}
	274
	275	/*
	276	* Public entry points & extern's
	277	*/
	278	int brcmf_sdioh_attach(struct brcmf_sdio_dev *sdiodev)
	279	{
	280	int err_ret = 0;
2f5f817f AS	281	struct mmc_host *host;
	282	struct sdio_func *func;
	283	uint max_blocks;
5b435de0	284
c3203374	285	brcmf_dbg(SDIO, "\n");
5b435de0 AS	286
	287	sdiodev->num_funcs = 2;
	288
	289	sdio_claim_host(sdiodev->func[1]);
38b0b0dd	290
5b435de0	291	err_ret = sdio_set_block_size(sdiodev->func[1], SDIO_FUNC1_BLOCKSIZE);
5b435de0	292	if (err_ret) {
5e8149f5	293	brcmf_err("Failed to set F1 blocksize\n");
5b435de0 AS	294	goto out;
	295	}
	296
5b435de0	297	err_ret = sdio_set_block_size(sdiodev->func[2], SDIO_FUNC2_BLOCKSIZE);
5b435de0	298	if (err_ret) {
5e8149f5	299	brcmf_err("Failed to set F2 blocksize\n");
5b435de0 AS	300	goto out;
	301	}
	302
	303	brcmf_sdioh_enablefuncs(sdiodev);
	304
2f5f817f AS	305	/*
	306	* determine host related variables after brcmf_sdio_probe()
	307	* as func->cur_blksize is properly set and F2 init has been
	308	* completed successfully.
	309	*/
	310	func = sdiodev->func[2];
	311	host = func->card->host;
	312	sdiodev->sg_support = host->max_segs > 1;
	313	max_blocks = min_t(uint, host->max_blk_count, 511u);
	314	sdiodev->max_request_size = min_t(uint, host->max_req_size,
	315	max_blocks * func->cur_blksize);
	316	sdiodev->max_segment_count = min_t(uint, host->max_segs,
	317	SG_MAX_SINGLE_ALLOC);
	318	sdiodev->max_segment_size = host->max_seg_size;
5b435de0	319	out:
38b0b0dd	320	sdio_release_host(sdiodev->func[1]);
c3203374	321	brcmf_dbg(SDIO, "Done\n");
5b435de0 AS	322	return err_ret;
	323	}
	324
	325	void brcmf_sdioh_detach(struct brcmf_sdio_dev *sdiodev)
	326	{
c3203374	327	brcmf_dbg(SDIO, "\n");
5b435de0 AS	328
	329	/* Disable Function 2 */
	330	sdio_claim_host(sdiodev->func[2]);
	331	sdio_disable_func(sdiodev->func[2]);
	332	sdio_release_host(sdiodev->func[2]);
	333
	334	/* Disable Function 1 */
	335	sdio_claim_host(sdiodev->func[1]);
	336	sdio_disable_func(sdiodev->func[1]);
	337	sdio_release_host(sdiodev->func[1]);
	338
	339	}
	340
	341	static int brcmf_ops_sdio_probe(struct sdio_func *func,
5b3c1832	342	const struct sdio_device_id *id)
5b435de0	343	{
5b3c1832	344	int err;
5b435de0	345	struct brcmf_sdio_dev *sdiodev;
655713be	346	struct brcmf_bus *bus_if;
ba89bf19	347
c3203374 AS	348	brcmf_dbg(SDIO, "Enter\n");
	349	brcmf_dbg(SDIO, "Class=%x\n", func->class);
	350	brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
	351	brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
	352	brcmf_dbg(SDIO, "Function#: %d\n", func->num);
5b3c1832 HM	353
	354	/* Consume func num 1 but dont do anything with it. */
	355	if (func->num == 1)
	356	return 0;
	357
	358	/* Ignore anything but func 2 */
	359	if (func->num != 2)
	360	return -ENODEV;
	361
	362	bus_if = kzalloc(sizeof(struct brcmf_bus), GFP_KERNEL);
	363	if (!bus_if)
	364	return -ENOMEM;
	365	sdiodev = kzalloc(sizeof(struct brcmf_sdio_dev), GFP_KERNEL);
	366	if (!sdiodev) {
	367	kfree(bus_if);
	368	return -ENOMEM;
5b435de0 AS	369	}
5b435de0 AS	370
5b3c1832 HM	371	sdiodev->func[0] = func->card->sdio_func[0];
	372	sdiodev->func[1] = func->card->sdio_func[0];
	373	sdiodev->func[2] = func;
	374
	375	sdiodev->bus_if = bus_if;
	376	bus_if->bus_priv.sdio = sdiodev;
5b3c1832 HM	377	dev_set_drvdata(&func->dev, bus_if);
	378	dev_set_drvdata(&sdiodev->func[1]->dev, bus_if);
	379	sdiodev->dev = &sdiodev->func[1]->dev;
668761ac	380	sdiodev->pdata = brcmfmac_sdio_pdata;
5b3c1832 HM	381
	382	atomic_set(&sdiodev->suspend, false);
	383	init_waitqueue_head(&sdiodev->request_byte_wait);
	384	init_waitqueue_head(&sdiodev->request_word_wait);
5b3c1832	385	init_waitqueue_head(&sdiodev->request_buffer_wait);
5b3c1832	386
c3203374	387	brcmf_dbg(SDIO, "F2 found, calling brcmf_sdio_probe...\n");
5b3c1832 HM	388	err = brcmf_sdio_probe(sdiodev);
5b3c1832 HM	389	if (err) {
5e8149f5	390	brcmf_err("F2 error, probe failed %d...\n", err);
5b3c1832	391	goto fail;
5b435de0	392	}
71201496	393
c3203374	394	brcmf_dbg(SDIO, "F2 init completed...\n");
5b3c1832	395	return 0;
5b435de0	396
5b3c1832 HM	397	fail:
	398	dev_set_drvdata(&func->dev, NULL);
	399	dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
	400	kfree(sdiodev);
	401	kfree(bus_if);
	402	return err;
5b435de0 AS	403	}
	404
	405	static void brcmf_ops_sdio_remove(struct sdio_func *func)
	406	{
655713be	407	struct brcmf_bus *bus_if;
5b435de0	408	struct brcmf_sdio_dev *sdiodev;
5b3c1832	409
c3203374 AS	410	brcmf_dbg(SDIO, "Enter\n");
	411	brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor);
	412	brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device);
	413	brcmf_dbg(SDIO, "Function: %d\n", func->num);
5b435de0	414
5b3c1832 HM	415	if (func->num != 1 && func->num != 2)
	416	return;
	417
	418	bus_if = dev_get_drvdata(&func->dev);
	419	if (bus_if) {
0a332e46	420	sdiodev = bus_if->bus_priv.sdio;
5b435de0	421	brcmf_sdio_remove(sdiodev);
5b3c1832 HM	422
	423	dev_set_drvdata(&sdiodev->func[1]->dev, NULL);
	424	dev_set_drvdata(&sdiodev->func[2]->dev, NULL);
	425
655713be	426	kfree(bus_if);
5b435de0 AS	427	kfree(sdiodev);
5b435de0 AS	428	}
5b3c1832	429
c3203374	430	brcmf_dbg(SDIO, "Exit\n");
5b435de0 AS	431	}
	432
	433	#ifdef CONFIG_PM_SLEEP
	434	static int brcmf_sdio_suspend(struct device *dev)
	435	{
	436	mmc_pm_flag_t sdio_flags;
5b3c1832 HM	437	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
5b3c1832 HM	438	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
5b435de0 AS	439	int ret = 0;
5b435de0 AS	440
c3203374	441	brcmf_dbg(SDIO, "\n");
5b435de0	442
5b435de0 AS	443	atomic_set(&sdiodev->suspend, true);
	444
	445	sdio_flags = sdio_get_host_pm_caps(sdiodev->func[1]);
	446	if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
5e8149f5	447	brcmf_err("Host can't keep power while suspended\n");
5b435de0 AS	448	return -EINVAL;
	449	}
	450
	451	ret = sdio_set_host_pm_flags(sdiodev->func[1], MMC_PM_KEEP_POWER);
	452	if (ret) {
5e8149f5	453	brcmf_err("Failed to set pm_flags\n");
5b435de0 AS	454	return ret;
	455	}
	456
	457	brcmf_sdio_wdtmr_enable(sdiodev, false);
	458
	459	return ret;
	460	}
	461
	462	static int brcmf_sdio_resume(struct device *dev)
	463	{
5b3c1832 HM	464	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
5b3c1832 HM	465	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
5b435de0	466
5b435de0 AS	467	brcmf_sdio_wdtmr_enable(sdiodev, true);
	468	atomic_set(&sdiodev->suspend, false);
	469	return 0;
	470	}
	471
	472	static const struct dev_pm_ops brcmf_sdio_pm_ops = {
	473	.suspend = brcmf_sdio_suspend,
	474	.resume = brcmf_sdio_resume,
	475	};
	476	#endif /* CONFIG_PM_SLEEP */
	477
	478	static struct sdio_driver brcmf_sdmmc_driver = {
	479	.probe = brcmf_ops_sdio_probe,
	480	.remove = brcmf_ops_sdio_remove,
668761ac	481	.name = BRCMFMAC_SDIO_PDATA_NAME,
5b435de0 AS	482	.id_table = brcmf_sdmmc_ids,
	483	#ifdef CONFIG_PM_SLEEP
	484	.drv = {
	485	.pm = &brcmf_sdio_pm_ops,
	486	},
	487	#endif /* CONFIG_PM_SLEEP */
	488	};
	489
ba89bf19 FL	490	static int brcmf_sdio_pd_probe(struct platform_device *pdev)
ba89bf19 FL	491	{
668761ac	492	brcmf_dbg(SDIO, "Enter\n");
ba89bf19	493
f4116702	494	brcmfmac_sdio_pdata = dev_get_platdata(&pdev->dev);
ba89bf19	495
668761ac HM	496	if (brcmfmac_sdio_pdata->power_on)
668761ac HM	497	brcmfmac_sdio_pdata->power_on();
ba89bf19	498
db4efbbe	499	return 0;
ba89bf19 FL	500	}
ba89bf19 FL	501
668761ac	502	static int brcmf_sdio_pd_remove(struct platform_device *pdev)
ba89bf19	503	{
c3203374	504	brcmf_dbg(SDIO, "Enter\n");
ba89bf19	505
668761ac HM	506	if (brcmfmac_sdio_pdata->power_off)
	507	brcmfmac_sdio_pdata->power_off();
	508
ba89bf19 FL	509	sdio_unregister_driver(&brcmf_sdmmc_driver);
ba89bf19 FL	510
668761ac	511	return 0;
ba89bf19 FL	512	}
ba89bf19 FL	513
668761ac HM	514	static struct platform_driver brcmf_sdio_pd = {
	515	.remove = brcmf_sdio_pd_remove,
	516	.driver = {
f91f5f05 LC	517	.name = BRCMFMAC_SDIO_PDATA_NAME,
f91f5f05 LC	518	.owner = THIS_MODULE,
668761ac HM	519	}
668761ac HM	520	};
ba89bf19	521
db4efbbe AS	522	void brcmf_sdio_register(void)
	523	{
	524	int ret;
	525
	526	ret = sdio_register_driver(&brcmf_sdmmc_driver);
	527	if (ret)
	528	brcmf_err("sdio_register_driver failed: %d\n", ret);
	529	}
	530
f3d7cdc3	531	void brcmf_sdio_exit(void)
5b435de0	532	{
c3203374	533	brcmf_dbg(SDIO, "Enter\n");
5b435de0	534
668761ac HM	535	if (brcmfmac_sdio_pdata)
	536	platform_driver_unregister(&brcmf_sdio_pd);
	537	else
	538	sdio_unregister_driver(&brcmf_sdmmc_driver);
5b435de0 AS	539	}
5b435de0 AS	540
db4efbbe	541	void __init brcmf_sdio_init(void)
5b435de0	542	{
3392c888 FL	543	int ret;
3392c888 FL	544
c3203374	545	brcmf_dbg(SDIO, "Enter\n");
5b435de0	546
668761ac	547	ret = platform_driver_probe(&brcmf_sdio_pd, brcmf_sdio_pd_probe);
db4efbbe AS	548	if (ret == -ENODEV)
db4efbbe AS	549	brcmf_dbg(SDIO, "No platform data available.\n");
5b435de0	550	}