Merge "msm: usb_bam: remove HSUSB/HSIC support" into msm-next

- reg  : pair of physical base addresses and region size of BAM device

- interrupts: IRQ line for BAM device

- qcom,usb-bam-num-pipes: max number of pipes that can be used

- qcom,bam-type: BAM type can be one of

	0 - SSUSB_BAM

	1 - HSUSB_BAM

	2 - HSIC_BAM

Optional properties:

- qcom,usb-bam-fifo-baseaddr: base address for bam pipe's data and descriptor

  fifos. This can be on chip memory (ocimem). This

  property is required if sub-node's mem-type is ocimem or usb private mem.

- qcom,ignore-core-reset-ack: If present then BAM ignores ACK from USB core

	    while performing PIPE RESET

- qcom,disable-clk-gating: If present then disable BAM clock gating.

- qcom,usb-bam-override-threshold: If present then the default 512 byte threshold

		is overridden. This threshold configures the threshold value for Read/Write

            for either rx or tx direction.

- qcom,usb-bam-max-mbps-superspeed: max mbps in super speed connection

            for either rx or tx direction.

- qcom,bam-mode: BAM mode can be one of.

	0 - BAM_MODE_DEVICE

	1 - BAM_MODE_HOST

	(If not set will be set by default to BAM_MODE_DEVICE)

- qcom,reset-bam-on-connect: If present then BAM is RESET before connecting

  pipe. This may be required if BAM peripheral is also reset before connect.

- qcom,reset-bam-on-disconnect: If present then BAM is RESET after disconnecting pipes.

- qcom,enable-hsusb-bam-on-boot: If present then BAM is enabled at bootup itself.

A number of USB BAM pipe parameters are represented as sub-nodes:

#define TIME_BUF_LEN  17

#define DBG_EVENT_LEN  143

/* Additional memory to be allocated than required data fifo size */

#define DATA_FIFO_EXTRA_MEM_ALLOC_SIZE 512

#define ENABLE_EVENT_LOG 1

static unsigned int enable_event_log = ENABLE_EVENT_LOG;

module_param(enable_event_log, uint, 0644);

 *	a peer bam.

 * @max_connections: The maximum number of pipes that are configured

 *	in the platform data.

 * @h_bam: This array stores for each BAM ("ssusb", "hsusb" or "hsic") the

 *	handle/device of the sps driver.

 * @pipes_enabled_per_bam: This array stores for each BAM

 *	("ssusb", "hsusb" or "hsic") the number of pipes currently enabled.

 * @h_bam: the handle/device of the sps driver.

 * @pipes_enabled_per_bam: the number of pipes currently enabled.

 * @inactivity_timer_ms: The timeout configuration per each bam for inactivity

 *	timer feature.

 * @is_bam_inactivity: Is there no activity on all pipes belongs to a

	spinlock_t		usb_bam_lock;

};

static char *bam_enable_strings[MAX_BAMS] = {

	[DWC3_CTRL] = "ssusb",

	[CI_CTRL] = "hsusb",

	[HSIC_CTRL]  = "hsic",

};

static struct usb_bam_ctx_type msm_usb_bam[MAX_BAMS];

/* USB bam type used as a peer of the qdss in bam2bam mode */

static enum usb_ctrl qdss_usb_bam_type;

		nanosec_rem);

}

static int get_bam_type_from_core_name(const char *name)

static inline enum usb_ctrl get_bam_type_from_core_name(const char *name)

{

	if (strnstr(name, bam_enable_strings[DWC3_CTRL],

			USB_BAM_MAX_STR_LEN) ||

		strnstr(name, "dwc3", USB_BAM_MAX_STR_LEN))

		return DWC3_CTRL;

	else if (strnstr(name, bam_enable_strings[HSIC_CTRL],

			USB_BAM_MAX_STR_LEN) ||

		strnstr(name, "ci13xxx_msm_hsic", USB_BAM_MAX_STR_LEN))

		return HSIC_CTRL;

	else if (strnstr(name, bam_enable_strings[CI_CTRL],

			USB_BAM_MAX_STR_LEN) ||

		strnstr(name, "ci", USB_BAM_MAX_STR_LEN))

		return CI_CTRL;

	log_event_err("%s: invalid BAM name(%s)\n", __func__, name);

	return -EINVAL;

	return USB_CTRL_UNUSED;

}

static void usb_bam_set_inactivity_timer(enum usb_ctrl bam)

	}

	if (!pipe) {

		pr_warn("%s: Bam %s has no connected pipes\n", __func__,

			bam_enable_strings[bam]);

		pr_warn("%s: Bam has no connected pipes\n", __func__);

		return;

	}

		/* BAM would use system memory, allocate FIFOs */

		data_buf->size = pipe_connect->data_fifo_size;

		/* On platforms which use CI controller, USB HW can fetch

		 * additional 128 bytes at the end of circular buffer when

		 * AXI prefetch is enabled and hence requirement is to

		 * allocate 512 bytes more than required length.

		 */

		if (pipe_connect->bam_type == CI_CTRL)

			data_buf->base =

				dma_alloc_coherent(&ctx->usb_bam_pdev->dev,

				(pipe_connect->data_fifo_size +

					DATA_FIFO_EXTRA_MEM_ALLOC_SIZE),

				&(data_buf->phys_base),

				GFP_KERNEL);

		else

			data_buf->base =

				dma_alloc_coherent(&ctx->usb_bam_pdev->dev,

		data_buf->base = dma_alloc_coherent(&ctx->usb_bam_pdev->dev,

				pipe_connect->data_fifo_size,

				&(data_buf->phys_base),

				GFP_KERNEL);

				&(data_buf->phys_base), GFP_KERNEL);

		if (!data_buf->base) {

			log_event_err("%s: dma_alloc_coherent failed for data fifo\n",

								__func__);

		if (!desc_buf->base) {

			log_event_err("%s: dma_alloc_coherent failed for desc fifo\n",

								__func__);

			if (pipe_connect->bam_type == CI_CTRL)

				dma_free_coherent(&ctx->usb_bam_pdev->dev,

				(pipe_connect->data_fifo_size +

					DATA_FIFO_EXTRA_MEM_ALLOC_SIZE),

				data_buf->base,

				data_buf->phys_base);

			else

			dma_free_coherent(&ctx->usb_bam_pdev->dev,

					pipe_connect->data_fifo_size,

				data_buf->base,

				data_buf->phys_base);

					data_buf->base, data_buf->phys_base);

			ret = -ENOMEM;

			goto err_exit;

		}

		log_event_dbg("%s: Freeing system memory used by PIPE\n",

				__func__);

		if (sps_connection->data.phys_base) {

			if (cur_bam == CI_CTRL)

				dma_free_coherent(&ctx->usb_bam_pdev->dev,

					(sps_connection->data.size +

						DATA_FIFO_EXTRA_MEM_ALLOC_SIZE),

					sps_connection->data.base,

					sps_connection->data.phys_base);

			else

			dma_free_coherent(&ctx->usb_bam_pdev->dev,

					sps_connection->data.size,

					sps_connection->data.base,

	struct usb_bam_pipe_connect *pipe_connect =

				&ctx->usb_bam_connections[idx];

	struct device *bam_dev = &ctx->usb_bam_pdev->dev;

	enum usb_bam_mode cur_mode;

	if (pipe_connect->enabled) {

		pr_warn("%s: connection %d was already established\n",

		return -EINVAL;

	}

	cur_mode = pipe_connect->bam_mode;

	log_event_dbg("%s: PM Runtime GET %d, count: %d\n",

			__func__, idx, get_pm_runtime_counter(bam_dev));

	pm_runtime_get_sync(bam_dev);

	if ((ctx->usb_bam_data->reset_on_connect == true) &&

			    (ctx->pipes_enabled_per_bam == 0)) {

		spin_unlock(&ctx->usb_bam_lock);

		if (cur_bam == CI_CTRL)

			msm_hw_bam_disable(1);

		sps_device_reset(ctx->h_bam);

		if (cur_bam == CI_CTRL)

			msm_hw_bam_disable(0);

		spin_lock(&ctx->usb_bam_lock);

	}

	spin_unlock(&ctx->usb_bam_lock);

	log_event_dbg("%s: success disconnecting pipe %d\n", __func__, idx);

	if (ctx->usb_bam_data->reset_on_disconnect

				&& !ctx->pipes_enabled_per_bam) {

		if (bam_type == CI_CTRL)

			msm_hw_bam_disable(1);

				&& !ctx->pipes_enabled_per_bam)

		sps_device_reset(ctx->h_bam);

		if (bam_type == CI_CTRL)

			msm_hw_bam_disable(0);

		/* Enable usb irq here which is disabled in function drivers

		 * during disconnect after BAM reset.

		 */

		if (bam_type == CI_CTRL)

			msm_usb_irq_disable(false);

	}

	/* This function is directly called by USB Transport drivers

	 * to disconnect pipes. Drop runtime usage count here.

	 */

{

	int i;

	int bam;

	struct usb_bam_ctx_type *ctx;

	struct usb_bam_ctx_type *ctx = user;

	struct usb_bam_pipe_connect *pipe_connect;

	struct usb_bam_event_info *event_info;

		log_event_dbg("%s: received SPS_CALLBACK_BAM_TIMER_IRQ\n",

				__func__);

		bam = get_bam_type_from_core_name((char *)user);

		if (bam < 0 || bam >= MAX_BAMS) {

			log_event_err("%s: Invalid bam, type=%d ,name=%s\n",

				__func__, bam, (char *)user);

			return;

		}

		ctx = &msm_usb_bam[bam];

		spin_lock(&ctx->usb_bam_lock);

		ctx->is_bam_inactivity = true;

	struct device_node *node = pdev->dev.of_node;

	int rc = 0;

	u8 i = 0;

	u32 bam, bam_mode;

	u32 bam = USB_CTRL_UNUSED;

	u32 addr = 0;

	u32 threshold, max_connections = 0;

	static struct usb_bam_pipe_connect *usb_bam_connections;

	if (!usb_bam_data)

		return NULL;

	rc = of_property_read_u32(node, "qcom,bam-type", &bam);

	if (rc) {

		log_event_err("%s: bam type is missing in device tree\n",

			__func__);

		return NULL;

	}

	if (bam >= MAX_BAMS) {

		log_event_err("%s: Invalid bam type %d in device tree\n",

			__func__, bam);

		return NULL;

	}

	usb_bam_data->bam_type = bam;

	rc = of_property_read_u32(node, "qcom,bam-mode", &bam_mode);

	if (rc) {

		pr_debug("%s: bam mode is missing in device tree\n",

			__func__);

		/* Default to DEVICE if bam_mode is not specified */

		bam_mode = USB_BAM_DEVICE;

	}

	usb_bam_data->reset_on_connect = of_property_read_bool(node,

					"qcom,reset-bam-on-connect");

	else

		usb_bam_data->usb_bam_fifo_baseaddr = addr;

	usb_bam_data->ignore_core_reset_ack = of_property_read_bool(node,

		"qcom,ignore-core-reset-ack");

	usb_bam_data->disable_clk_gating = of_property_read_bool(node,

		"qcom,disable-clk-gating");

	else

		usb_bam_data->override_threshold = threshold;

	usb_bam_data->enable_hsusb_bam_on_boot = of_property_read_bool(node,

		"qcom,enable-hsusb-bam-on-boot");

	for_each_child_of_node(pdev->dev.of_node, node)

		max_connections++;

	/* retrieve device tree parameters */

	for_each_child_of_node(pdev->dev.of_node, node) {

		usb_bam_connections[i].bam_type = bam;

		usb_bam_connections[i].bam_mode = bam_mode;

		rc = of_property_read_string(node, "label",

			&usb_bam_connections[i].name);

	memset(&props, 0, sizeof(props));

	pr_debug("%s: %s\n", __func__, bam_enable_strings[bam_type]);

	pr_debug("%s\n", __func__);

	props.phys_addr = ctx->io_res->start;

	props.virt_size = resource_size(ctx->io_res);

	props.event_threshold = ctx->usb_bam_data->override_threshold;

	props.num_pipes = ctx->usb_bam_data->usb_bam_num_pipes;

	props.callback = usb_bam_sps_events;

	props.user = bam_enable_strings[bam_type];

	/*

	 * HSUSB and HSIC Cores don't support RESET ACK signal to BAMs

	 * Hence, let BAM to ignore acknowledge from USB while resetting PIPE

	 */

	if (ctx->usb_bam_data->ignore_core_reset_ack && bam_type != DWC3_CTRL)

		props.options = SPS_BAM_NO_EXT_P_RST;

	props.user = &msm_usb_bam[bam_type];

	if (ctx->usb_bam_data->disable_clk_gating)

		props.options |= SPS_BAM_NO_LOCAL_CLK_GATING;

	/*

	 * HSUSB BAM is not NDP BAM and it must be enabled early before

	 * starting peripheral controller to avoid switching USB core mode

	 * from legacy to BAM with ongoing data transfers.

	 */

	if (ctx->usb_bam_data->enable_hsusb_bam_on_boot

					&& bam_type == CI_CTRL) {

		pr_debug("Register and enable HSUSB BAM\n");

		props.options |= SPS_BAM_OPT_ENABLE_AT_BOOT;

	}

	ret = sps_register_bam_device(&props, &ctx->h_bam);

	if (ret < 0) {

	enum usb_ctrl bam_type = ctx->usb_bam_data->bam_type;

	ret = usb_bam_init(pdev);

	if (ret) {

		log_event_err("failed to init bam %s\n",

				bam_enable_strings[bam_type]);

	if (ret)

		return ret;

	}

	ctx->usb_bam_sps.sps_pipes = devm_kzalloc(&pdev->dev,

		ctx->max_connections * sizeof(struct sps_pipe *),

	/* QDSS uses only one pipe */

	idx = usb_bam_get_connection_idx(qdss_usb_bam_type, QDSS_P_BAM,

		PEER_PERIPHERAL_TO_USB, USB_BAM_DEVICE, 0);

		PEER_PERIPHERAL_TO_USB, 0);

	get_bam2bam_connection_info(qdss_usb_bam_type, idx, usb_bam_pipe_idx,

						desc_fifo, data_fifo, mem_type);

EXPORT_SYMBOL(get_qdss_bam_connection_info);

int usb_bam_get_connection_idx(enum usb_ctrl bam_type, enum peer_bam client,

	enum usb_bam_pipe_dir dir, enum usb_bam_mode bam_mode, u32 num)

	enum usb_bam_pipe_dir dir, u32 num)

{

	struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam_type];

	u8 i;

	for (i = 0; i < ctx->max_connections; i++) {

		if (ctx->usb_bam_connections[i].peer_bam == client &&

		    ctx->usb_bam_connections[i].dir == dir &&

		    ctx->usb_bam_connections[i].bam_mode == bam_mode &&

		    ctx->usb_bam_connections[i].pipe_num == num) {

			log_event_dbg("%s: index %d was found\n", __func__, i);

			return i;

}

EXPORT_SYMBOL(usb_bam_get_connection_idx);

int usb_bam_get_bam_type(const char *core_name)

enum usb_ctrl usb_bam_get_bam_type(const char *core_name)

{

	int bam_type = get_bam_type_from_core_name(core_name);

	enum usb_ctrl bam_type = get_bam_type_from_core_name(core_name);

	if (bam_type < 0 || bam_type >= MAX_BAMS) {

		log_event_err("%s: Invalid bam, type=%d, name=%s\n",

}

EXPORT_SYMBOL(usb_bam_get_bam_type);

bool msm_usb_bam_enable(enum usb_ctrl bam, bool bam_enable)

{

	struct msm_usb_bam_data *usb_bam_data;

	struct usb_bam_ctx_type *ctx = &msm_usb_bam[bam];

	if (!ctx->usb_bam_pdev)

		return 0;

	usb_bam_data = ctx->usb_bam_data;

	if ((bam != CI_CTRL) || !(bam_enable ||

					usb_bam_data->enable_hsusb_bam_on_boot))

		return 0;

	msm_hw_bam_disable(1);

	sps_device_reset(ctx->h_bam);

	msm_hw_bam_disable(0);

	return 0;

}

EXPORT_SYMBOL(msm_usb_bam_enable);

static int usb_bam_remove(struct platform_device *pdev)

{

	struct usb_bam_ctx_type *ctx = dev_get_drvdata(&pdev->dev);

	bam_info = qdss->bam_info;

	/* There is only one qdss pipe, so the pipe number can be set to 0 */

	idx = usb_bam_get_connection_idx(usb_bam_type, QDSS_P_BAM,

		PEER_PERIPHERAL_TO_USB, USB_BAM_DEVICE, 0);

		PEER_PERIPHERAL_TO_USB, 0);

	if (idx < 0) {

		pr_err("%s: usb_bam_get_connection_idx failed\n", __func__);

		return idx;

#ifndef _USB_BAM_H_

#define _USB_BAM_H_

#include <linux/msm-sps.h>

#include <linux/usb/ch9.h>

/* Supported USB controllers*/

enum usb_ctrl {

	DWC3_CTRL = 0,  /* DWC3 controller */

	CI_CTRL,        /* ChipIdea controller */

	HSIC_CTRL,      /* HSIC controller */

	USB_CTRL_UNUSED = 0,

	NUM_CTRL,

};

enum usb_bam_mode {

	USB_BAM_DEVICE = 0,

	USB_BAM_HOST,

};

enum peer_bam {

	QDSS_P_BAM = 0,

	MAX_PEER_BAMS,

	enum usb_pipe_mem_type mem_type;

	enum usb_bam_pipe_dir dir;

	enum usb_ctrl bam_type;

	enum usb_bam_mode bam_mode;

	enum peer_bam peer_bam;

	enum usb_bam_pipe_type pipe_type;

	u32 src_phy_addr;

 * @usb_bam_fifo_baseaddr: base address for bam pipe's data and descriptor

 *                         fifos. This can be on chip memory (ocimem) or usb

 *                         private memory.

 * @ignore_core_reset_ack: BAM can ignore ACK from USB core during PIPE RESET

 * @reset_on_connect: BAM must be reset before its first pipe connect

 * @reset_on_disconnect: BAM must be reset after its last pipe disconnect

 * @disable_clk_gating: Disable clock gating

 *		can work at in bam2bam mode when connected to HS host.

 * @max_mbps_superspeed: Maximum Mbits per seconds that the USB core

 *		can work at in bam2bam mode when connected to SS host.

 * @enable_hsusb_bam_on_boot: Enable HSUSB BAM (non-NDP) on bootup itself

 */

struct msm_usb_bam_data {

	u8 max_connections;

	int usb_bam_num_pipes;

	phys_addr_t usb_bam_fifo_baseaddr;

	bool ignore_core_reset_ack;

	bool reset_on_connect;

	bool reset_on_disconnect;

	bool disable_clk_gating;

	u32 override_threshold;

	u32 max_mbps_highspeed;

	u32 max_mbps_superspeed;

	bool enable_hsusb_bam_on_boot;

	enum usb_ctrl bam_type;

};

 * @return 0 on success, negative value on error

 */

int usb_bam_get_connection_idx(enum usb_ctrl bam_type, enum peer_bam client,

	enum usb_bam_pipe_dir dir, enum usb_bam_mode bam_mode, u32 num);

	enum usb_bam_pipe_dir dir, u32 num);

/*

 * return the usb controller bam type used for the supplied connection index

 *

 * @return usb control bam type

 */

int usb_bam_get_bam_type(const char *core_name);

enum usb_ctrl usb_bam_get_bam_type(const char *core_name);

/*

 * Indicates the type of connection the USB side of the connection is.

/* Frees memory for data fifo and descriptor fifos. */

int usb_bam_free_fifos(enum usb_ctrl cur_bam, u8 idx);

bool msm_usb_bam_enable(enum usb_ctrl ctrl, bool bam_enable);

#else

static inline int usb_bam_connect(enum usb_ctrl bam, u8 idx, u32 *bam_pipe_idx)

{

}

static inline int usb_bam_get_connection_idx(enum usb_ctrl bam_type,

		enum peer_bam client, enum usb_bam_pipe_dir dir,

		enum usb_bam_mode bam_mode, u32 num)

		enum peer_bam client, enum usb_bam_pipe_dir dir, u32 num)

{

	return -ENODEV;

}

static inline int usb_bam_get_bam_type(const char *core_nam)

static inline enum usb_ctrl usb_bam_get_bam_type(const char *core_nam)

{

	return -ENODEV;

}

{

	return false;

}

static inline bool msm_usb_bam_enable(enum usb_ctrl ctrl, bool bam_enable)

{ return true; }

#endif

#ifdef CONFIG_USB_CI13XXX_MSM

void msm_hw_bam_disable(bool bam_disable);

void msm_usb_irq_disable(bool disable);

#else

static inline void msm_hw_bam_disable(bool bam_disable)

{ }

static inline void msm_usb_irq_disable(bool disable)

{ }

#endif

/* CONFIG_PM */