diff options
Diffstat (limited to 'arch/arm/mach-omap2/omap_hwmod.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 52c69d265f7..23011975650 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -850,6 +850,147 @@ static int _count_ocp_if_addr_spaces(struct omap_hwmod_ocp_if *os) } /** + * _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 * @@ -2526,6 +2671,69 @@ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res) } /** + * 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 * * |