Commit 5e8370f1 authored by Paul Walmsley's avatar Paul Walmsley
Browse files

ARM: OMAP2+: hwmod: add omap_hwmod_get_resource_byname() 



The timer integration code pokes around in hwmod data structures.
Those data structures are about to change.  Define a function,
omap_hwmod_get_resource_byname(), for the timer integration code to
use instead.

The original patch has been changed to use struct resource by Tony's
request, although the caller of this function should not be a driver._
Platform drivers should get their data through the regular platform_*
functions; DT drivers through the appropriate of_* functions.  This a
function is only for use by OMAP core code in arch/arm/*omap*.

Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
parent c9aafd23

arch/arm/mach-omap2/omap_hwmod.c

+208 −0
Original line number Diff line number Diff line
@@ -849,6 +849,147 @@ static int _count_ocp_if_addr_spaces(struct omap_hwmod_ocp_if *os) 
	return i-1;

}



/**

 * _get_mpu_irq_by_name - fetch MPU interrupt line number by name

 * @oh: struct omap_hwmod * to operate on

 * @name: pointer to the name of the MPU interrupt number to fetch (optional)

 * @irq: pointer to an unsigned int to store the MPU IRQ number to

 *

 * Retrieve a MPU hardware IRQ line number named by @name associated

 * with the IP block pointed to by @oh.  The IRQ number will be filled

 * into the address pointed to by @dma.  When @name is non-null, the

 * IRQ line number associated with the named entry will be returned.

 * If @name is null, the first matching entry will be returned.  Data

 * order is not meaningful in hwmod data, so callers are strongly

 * encouraged to use a non-null @name whenever possible to avoid

 * unpredictable effects if hwmod data is later added that causes data

 * ordering to change.  Returns 0 upon success or a negative error

 * code upon error.

 */

static int _get_mpu_irq_by_name(struct omap_hwmod *oh, const char *name,

				unsigned int *irq)

{

	int i;

	bool found = false;



	if (!oh->mpu_irqs)

		return -ENOENT;



	i = 0;

	while (oh->mpu_irqs[i].irq != -1) {

		if (name == oh->mpu_irqs[i].name ||

		    !strcmp(name, oh->mpu_irqs[i].name)) {

			found = true;

			break;

		}

		i++;

	}



	if (!found)

		return -ENOENT;



	*irq = oh->mpu_irqs[i].irq;



	return 0;

}



/**

 * _get_sdma_req_by_name - fetch SDMA request line ID by name

 * @oh: struct omap_hwmod * to operate on

 * @name: pointer to the name of the SDMA request line to fetch (optional)

 * @dma: pointer to an unsigned int to store the request line ID to

 *

 * Retrieve an SDMA request line ID named by @name on the IP block

 * pointed to by @oh.  The ID will be filled into the address pointed

 * to by @dma.  When @name is non-null, the request line ID associated

 * with the named entry will be returned.  If @name is null, the first

 * matching entry will be returned.  Data order is not meaningful in

 * hwmod data, so callers are strongly encouraged to use a non-null

 * @name whenever possible to avoid unpredictable effects if hwmod

 * data is later added that causes data ordering to change.  Returns 0

 * upon success or a negative error code upon error.

 */

static int _get_sdma_req_by_name(struct omap_hwmod *oh, const char *name,

				 unsigned int *dma)

{

	int i;

	bool found = false;



	if (!oh->sdma_reqs)

		return -ENOENT;



	i = 0;

	while (oh->sdma_reqs[i].dma_req != -1) {

		if (name == oh->sdma_reqs[i].name ||

		    !strcmp(name, oh->sdma_reqs[i].name)) {

			found = true;

			break;

		}

		i++;

	}



	if (!found)

		return -ENOENT;



	*dma = oh->sdma_reqs[i].dma_req;



	return 0;

}



/**

 * _get_addr_space_by_name - fetch address space start & end by name

 * @oh: struct omap_hwmod * to operate on

 * @name: pointer to the name of the address space to fetch (optional)

 * @pa_start: pointer to a u32 to store the starting address to

 * @pa_end: pointer to a u32 to store the ending address to

 *

 * Retrieve address space start and end addresses for the IP block

 * pointed to by @oh.  The data will be filled into the addresses

 * pointed to by @pa_start and @pa_end.  When @name is non-null, the

 * address space data associated with the named entry will be

 * returned.  If @name is null, the first matching entry will be

 * returned.  Data order is not meaningful in hwmod data, so callers

 * are strongly encouraged to use a non-null @name whenever possible

 * to avoid unpredictable effects if hwmod data is later added that

 * causes data ordering to change.  Returns 0 upon success or a

 * negative error code upon error.

 */

static int _get_addr_space_by_name(struct omap_hwmod *oh, const char *name,

				   u32 *pa_start, u32 *pa_end)

{

	int i, j;

	struct omap_hwmod_ocp_if *os;

	bool found = false;



	for (i = 0; i < oh->slaves_cnt; i++) {

		os = oh->slaves[i];



		if (!os->addr)

			return -ENOENT;



		j = 0;

		while (os->addr[j].pa_start != os->addr[j].pa_end) {

			if (name == os->addr[j].name ||

			    !strcmp(name, os->addr[j].name)) {

				found = true;

				break;

			}

			j++;

		}



		if (found)

			break;

	}



	if (!found)

		return -ENOENT;



	*pa_start = os->addr[j].pa_start;

	*pa_end = os->addr[j].pa_end;



	return 0;

}



/**

 * _find_mpu_port_index - find hwmod OCP slave port ID intended for MPU use

 * @oh: struct omap_hwmod *
@@ -2443,6 +2584,10 @@ int omap_hwmod_reset(struct omap_hwmod *oh) 
	return r;

}



/*

 * IP block data retrieval functions

 */



/**

 * omap_hwmod_count_resources - count number of struct resources needed by hwmod

 * @oh: struct omap_hwmod *
@@ -2525,6 +2670,69 @@ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res) 
	return r;

}



/**

 * omap_hwmod_get_resource_byname - fetch IP block integration data by name

 * @oh: struct omap_hwmod * to operate on

 * @type: one of the IORESOURCE_* constants from include/linux/ioport.h

 * @name: pointer to the name of the data to fetch (optional)

 * @rsrc: pointer to a struct resource, allocated by the caller

 *

 * Retrieve MPU IRQ, SDMA request line, or address space start/end

 * data for the IP block pointed to by @oh.  The data will be filled

 * into a struct resource record pointed to by @rsrc.  The struct

 * resource must be allocated by the caller.  When @name is non-null,

 * the data associated with the matching entry in the IRQ/SDMA/address

 * space hwmod data arrays will be returned.  If @name is null, the

 * first array entry will be returned.  Data order is not meaningful

 * in hwmod data, so callers are strongly encouraged to use a non-null

 * @name whenever possible to avoid unpredictable effects if hwmod

 * data is later added that causes data ordering to change.  This

 * function is only intended for use by OMAP core code.  Device

 * drivers should not call this function - the appropriate bus-related

 * data accessor functions should be used instead.  Returns 0 upon

 * success or a negative error code upon error.

 */

int omap_hwmod_get_resource_byname(struct omap_hwmod *oh, unsigned int type,

				   const char *name, struct resource *rsrc)

{

	int r;

	unsigned int irq, dma;

	u32 pa_start, pa_end;



	if (!oh || !rsrc)

		return -EINVAL;



	if (type == IORESOURCE_IRQ) {

		r = _get_mpu_irq_by_name(oh, name, &irq);

		if (r)

			return r;



		rsrc->start = irq;

		rsrc->end = irq;

	} else if (type == IORESOURCE_DMA) {

		r = _get_sdma_req_by_name(oh, name, &dma);

		if (r)

			return r;



		rsrc->start = dma;

		rsrc->end = dma;

	} else if (type == IORESOURCE_MEM) {

		r = _get_addr_space_by_name(oh, name, &pa_start, &pa_end);

		if (r)

			return r;



		rsrc->start = pa_start;

		rsrc->end = pa_end;

	} else {

		return -EINVAL;

	}



	rsrc->flags = type;

	rsrc->name = name;



	return 0;

}



/**

 * omap_hwmod_get_pwrdm - return pointer to this module's main powerdomain

 * @oh: struct omap_hwmod *

arch/arm/plat-omap/include/plat/omap_hwmod.h

+2 −0
Original line number Diff line number Diff line
@@ -581,6 +581,8 @@ int omap_hwmod_softreset(struct omap_hwmod *oh); 


int omap_hwmod_count_resources(struct omap_hwmod *oh);

int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res);

int omap_hwmod_get_resource_byname(struct omap_hwmod *oh, unsigned int type,

				   const char *name, struct resource *res);



struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh);

void __iomem *omap_hwmod_get_mpu_rt_va(struct omap_hwmod *oh);

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