@@ -533,6 +533,7 @@ F: drivers/phy/omap-usb2-phy.c
F: drivers/phy/phy-ti-am654.c
F: drivers/phy/ti-pipe3-phy.c
F: drivers/ram/k3*
+F: drivers/remoteproc/ipu_rproc.c
F: drivers/remoteproc/k3_system_controller.c
F: drivers/remoteproc/pruc_rpoc.c
F: drivers/remoteproc/ti*
@@ -92,4 +92,14 @@ config REMOTEPROC_TI_PRU
help
Say 'y' here to add support for TI' K3 remoteproc driver.
+config REMOTEPROC_TI_IPU
+ bool "Support for TI's K3 based IPU remoteproc driver"
+ select REMOTEPROC
+ depends on DM
+ depends on SPL_DRIVERS_MISC
+ depends on SPL_FS_LOADER
+ depends on OF_CONTROL
+ help
+ Say 'y' here to add support for TI' K3 remoteproc driver.
+
endmenu
@@ -15,3 +15,4 @@ obj-$(CONFIG_REMOTEPROC_TI_K3_DSP) += ti_k3_dsp_rproc.o
obj-$(CONFIG_REMOTEPROC_TI_K3_R5F) += ti_k3_r5f_rproc.o
obj-$(CONFIG_REMOTEPROC_TI_POWER) += ti_power_proc.o
obj-$(CONFIG_REMOTEPROC_TI_PRU) += pru_rproc.o
+obj-$(CONFIG_REMOTEPROC_TI_IPU) += ipu_rproc.o
new file mode 100644
@@ -0,0 +1,759 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * IPU remoteproc driver for various SoCs
+ *
+ * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
+ * Angela Stegmaier <angelabaker@ti.com>
+ * Venkateswara Rao Mandela <venkat.mandela@ti.com>
+ * Keerthy <j-keerthy@ti.com>
+ */
+
+#include <common.h>
+#include <hang.h>
+#include <cpu_func.h>
+#include <dm.h>
+#include <dm/device_compat.h>
+#include <elf.h>
+#include <env.h>
+#include <dm/of_access.h>
+#include <fs_loader.h>
+#include <remoteproc.h>
+#include <errno.h>
+#include <clk.h>
+#include <reset.h>
+#include <regmap.h>
+#include <syscon.h>
+#include <asm/io.h>
+#include <misc.h>
+#include <power-domain.h>
+#include <timer.h>
+#include <fs.h>
+#include <spl.h>
+#include <timer.h>
+#include <reset.h>
+#include <linux/bitmap.h>
+
+#define IPU1_LOAD_ADDR (0xa17ff000)
+#define MAX_REMOTECORE_BIN_SIZE (8 * 0x100000)
+
+enum ipu_num {
+ IPU1 = 0,
+ IPU2,
+ RPROC_END_ENUMS,
+};
+
+#define IPU2_LOAD_ADDR (IPU1_LOAD_ADDR + MAX_REMOTECORE_BIN_SIZE)
+
+#define PAGE_SHIFT 12
+#define PAGESIZE_1M 0x0
+#define PAGESIZE_64K 0x1
+#define PAGESIZE_4K 0x2
+#define PAGESIZE_16M 0x3
+#define LE 0
+#define BE 1
+#define ELEMSIZE_8 0x0
+#define ELEMSIZE_16 0x1
+#define ELEMSIZE_32 0x2
+#define MIXED_TLB 0x0
+#define MIXED_CPU 0x1
+
+#define PGT_SMALLPAGE_SIZE 0x00001000
+#define PGT_LARGEPAGE_SIZE 0x00010000
+#define PGT_SECTION_SIZE 0x00100000
+#define PGT_SUPERSECTION_SIZE 0x01000000
+
+#define PGT_L1_DESC_PAGE 0x00001
+#define PGT_L1_DESC_SECTION 0x00002
+#define PGT_L1_DESC_SUPERSECTION 0x40002
+
+#define PGT_L1_DESC_PAGE_MASK 0xfffffC00
+#define PGT_L1_DESC_SECTION_MASK 0xfff00000
+#define PGT_L1_DESC_SUPERSECTION_MASK 0xff000000
+
+#define PGT_L1_DESC_SMALLPAGE_INDEX_SHIFT 12
+#define PGT_L1_DESC_LARGEPAGE_INDEX_SHIFT 16
+#define PGT_L1_DESC_SECTION_INDEX_SHIFT 20
+#define PGT_L1_DESC_SUPERSECTION_INDEX_SHIFT 24
+
+#define PGT_L2_DESC_SMALLPAGE 0x02
+#define PGT_L2_DESC_LARGEPAGE 0x01
+
+#define PGT_L2_DESC_SMALLPAGE_MASK 0xfffff000
+#define PGT_L2_DESC_LARGEPAGE_MASK 0xffff0000
+
+/*
+ * The memory for the page tables (256 KB per IPU) is placed just before
+ * the carveout memories for the remote processors. 16 KB of memory is
+ * needed for the L1 page table (4096 entries * 4 bytes per 1 MB section).
+ * Any smaller page (64 KB or 4 KB) entries are supported through L2 page
+ * tables (1 KB per table). The remaining 240 KB can provide support for
+ * 240 L2 page tables. Any remoteproc firmware image requiring more than
+ * 240 L2 page table entries would need more memory to be reserved.
+ */
+#define PAGE_TABLE_SIZE_L1 (0x00004000)
+#define PAGE_TABLE_SIZE_L2 (0x400)
+#define MAX_NUM_L2_PAGE_TABLES (240)
+#define PAGE_TABLE_SIZE_L2_TOTAL (MAX_NUM_L2_PAGE_TABLES * PAGE_TABLE_SIZE_L2)
+#define PAGE_TABLE_SIZE (PAGE_TABLE_SIZE_L1 + (PAGE_TABLE_SIZE_L2_TOTAL))
+
+/**
+ * struct omap_rproc_mem - internal memory structure
+ * @cpu_addr: MPU virtual address of the memory region
+ * @bus_addr: bus address used to access the memory region
+ * @dev_addr: device address of the memory region from DSP view
+ * @size: size of the memory region
+ */
+struct omap_rproc_mem {
+ void __iomem *cpu_addr;
+ phys_addr_t bus_addr;
+ u32 dev_addr;
+ size_t size;
+};
+
+struct ipu_privdata {
+ struct omap_rproc_mem mem;
+ struct list_head mappings;
+ const char *fw_name;
+ u32 bootaddr;
+ int id;
+ struct udevice *rdev;
+};
+
+typedef int (*handle_resource_t) (void *, int offset, int avail);
+
+unsigned int *page_table_l1 = (unsigned int *)0x0;
+unsigned int *page_table_l2 = (unsigned int *)0x0;
+
+/*
+ * Set maximum carveout size to 96 MB
+ */
+#define DRA7_RPROC_MAX_CO_SIZE (96 * 0x100000)
+
+/*
+ * These global variables are used for deriving the MMU page tables. They
+ * are initialized for each core with the appropriate values. The length
+ * of the array mem_bitmap is set as per a 96 MB carveout which the
+ * maximum set aside in the current memory map.
+ */
+unsigned long mem_base;
+unsigned long mem_size;
+unsigned long
+
+mem_bitmap[BITS_TO_LONGS(DRA7_RPROC_MAX_CO_SIZE >> PAGE_SHIFT)];
+unsigned long mem_count;
+
+unsigned int pgtable_l2_map[MAX_NUM_L2_PAGE_TABLES];
+unsigned int pgtable_l2_cnt;
+
+void *ipu_alloc_mem(struct udevice *dev, unsigned long len, unsigned long align)
+{
+ unsigned long mask;
+ unsigned long pageno;
+ int count;
+
+ count = ((len + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1)) >> PAGE_SHIFT;
+ mask = (1 << align) - 1;
+ pageno =
+ bitmap_find_next_zero_area(mem_bitmap, mem_count, 0, count, mask);
+ debug("%s: count %d mask %#lx pageno %#lx\n", __func__, count, mask,
+ pageno);
+
+ if (pageno >= mem_count) {
+ debug("%s: %s Error allocating memory; "
+ "Please check carveout size\n", __FILE__, __func__);
+ return NULL;
+ }
+
+ bitmap_set(mem_bitmap, pageno, count);
+ return (void *)(mem_base + (pageno << PAGE_SHIFT));
+}
+
+int find_pagesz(unsigned int virt, unsigned int phys, unsigned int len)
+{
+ int pg_sz_ind = -1;
+ unsigned int min_align = __ffs(virt);
+
+ if (min_align > __ffs(phys))
+ min_align = __ffs(phys);
+
+ if (min_align >= PGT_L1_DESC_SUPERSECTION_INDEX_SHIFT &&
+ len >= 0x1000000) {
+ pg_sz_ind = PAGESIZE_16M;
+ goto ret_block;
+ }
+ if (min_align >= PGT_L1_DESC_SECTION_INDEX_SHIFT &&
+ len >= 0x100000) {
+ pg_sz_ind = PAGESIZE_1M;
+ goto ret_block;
+ }
+ if (min_align >= PGT_L1_DESC_LARGEPAGE_INDEX_SHIFT &&
+ len >= 0x10000) {
+ pg_sz_ind = PAGESIZE_64K;
+ goto ret_block;
+ }
+ if (min_align >= PGT_L1_DESC_SMALLPAGE_INDEX_SHIFT &&
+ len >= 0x1000) {
+ pg_sz_ind = PAGESIZE_4K;
+ goto ret_block;
+ }
+
+ ret_block:
+ return pg_sz_ind;
+}
+
+int get_l2_pg_tbl_addr(unsigned int virt, unsigned int *pg_tbl_addr)
+{
+ int ret = -1;
+ int i = 0;
+ int match_found = 0;
+ unsigned int tag = (virt & PGT_L1_DESC_SECTION_MASK);
+
+ *pg_tbl_addr = 0;
+ for (i = 0; (i < pgtable_l2_cnt) && (match_found == 0); i++) {
+ if (tag == pgtable_l2_map[i]) {
+ *pg_tbl_addr =
+ ((unsigned int)page_table_l2) +
+ (i * PAGE_TABLE_SIZE_L2);
+ match_found = 1;
+ ret = 0;
+ }
+ }
+
+ if (match_found == 0 && i < MAX_NUM_L2_PAGE_TABLES) {
+ pgtable_l2_map[i] = tag;
+ pgtable_l2_cnt++;
+ *pg_tbl_addr =
+ ((unsigned int)page_table_l2) + (i * PAGE_TABLE_SIZE_L2);
+ ret = 0;
+ }
+
+ return ret;
+}
+
+int
+config_l2_pagetable(unsigned int virt, unsigned int phys,
+ unsigned int pg_sz, unsigned int pg_tbl_addr)
+{
+ int ret = -1;
+ unsigned int desc = 0;
+ int i = 0;
+ unsigned int *pg_tbl = (unsigned int *)pg_tbl_addr;
+
+ /*
+ * Pick bit 19:12 of the virtual address as index
+ */
+ unsigned int index = (virt & (~PGT_L1_DESC_SECTION_MASK)) >> PAGE_SHIFT;
+
+ switch (pg_sz) {
+ case PAGESIZE_64K:
+ desc =
+ (phys & PGT_L2_DESC_LARGEPAGE_MASK) | PGT_L2_DESC_LARGEPAGE;
+ for (i = 0; i < 16; i++)
+ pg_tbl[index + i] = desc;
+ ret = 0;
+ break;
+ case PAGESIZE_4K:
+ desc =
+ (phys & PGT_L2_DESC_SMALLPAGE_MASK) | PGT_L2_DESC_SMALLPAGE;
+ pg_tbl[index] = desc;
+ ret = 0;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+unsigned int
+ipu_config_pagetable(struct udevice *dev, unsigned int virt, unsigned int phys,
+ unsigned int len)
+{
+ unsigned int index;
+ unsigned int l = len;
+ unsigned int desc;
+ int pg_sz = 0;
+ int i = 0, err = 0;
+ unsigned int pg_tbl_l2_addr = 0;
+ unsigned int tmp_pgsz;
+
+ if ((len & 0x0FFF) != 0)
+ return 0;
+
+ while (l > 0) {
+ pg_sz = find_pagesz(virt, phys, l);
+ index = virt >> PGT_L1_DESC_SECTION_INDEX_SHIFT;
+ switch (pg_sz) {
+ /*
+ * 16 MB super section
+ */
+ case PAGESIZE_16M:
+ /*
+ * Program the next 16 descriptors
+ */
+ desc =
+ (phys & PGT_L1_DESC_SUPERSECTION_MASK) |
+ PGT_L1_DESC_SUPERSECTION;
+ for (i = 0; i < 16; i++)
+ page_table_l1[index + i] = desc;
+ l -= PGT_SUPERSECTION_SIZE;
+ phys += PGT_SUPERSECTION_SIZE;
+ virt += PGT_SUPERSECTION_SIZE;
+ break;
+ /*
+ * 1 MB section
+ */
+ case PAGESIZE_1M:
+ desc =
+ (phys & PGT_L1_DESC_SECTION_MASK) |
+ PGT_L1_DESC_SECTION;
+ page_table_l1[index] = desc;
+ l -= PGT_SECTION_SIZE;
+ phys += PGT_SECTION_SIZE;
+ virt += PGT_SECTION_SIZE;
+ break;
+ /*
+ * 64 KB large page
+ */
+ case PAGESIZE_64K:
+ case PAGESIZE_4K:
+ if (pg_sz == PAGESIZE_64K)
+ tmp_pgsz = 0x10000;
+ else
+ tmp_pgsz = 0x1000;
+
+ err = get_l2_pg_tbl_addr(virt, &pg_tbl_l2_addr);
+ if (err != 0) {
+ debug
+ ("Unable to get level 2 PT address\n");
+ hang();
+ }
+ err =
+ config_l2_pagetable(virt, phys, pg_sz,
+ pg_tbl_l2_addr);
+ desc =
+ (pg_tbl_l2_addr & PGT_L1_DESC_PAGE_MASK) |
+ PGT_L1_DESC_PAGE;
+ page_table_l1[index] = desc;
+ l -= tmp_pgsz;
+ phys += tmp_pgsz;
+ virt += tmp_pgsz;
+ break;
+ case -1:
+ default:
+ return 0;
+ }
+ }
+
+ return len;
+}
+
+int da_to_pa(struct udevice *dev, int da)
+{
+ struct rproc_mem_entry *maps = NULL;
+ struct ipu_privdata *priv = dev_get_priv(dev);
+
+ list_for_each_entry(maps, &priv->mappings, node) {
+ if (da >= maps->da && da < (maps->da + maps->len))
+ return maps->dma + (da - maps->da);
+ }
+
+ return 0;
+}
+
+u32 ipu_config_mmu(u32 core_id, struct rproc *cfg)
+{
+ u32 i = 0;
+ u32 reg = 0;
+
+ /*
+ * Clear the entire pagetable location before programming the
+ * address into the MMU
+ */
+ memset((void *)cfg->page_table_addr, 0x00, PAGE_TABLE_SIZE);
+
+ for (i = 0; i < cfg->num_iommus; i++) {
+ u32 mmu_base = cfg->mmu_base_addr[i];
+
+ __raw_writel((int)cfg->page_table_addr, mmu_base + 0x4c);
+ reg = __raw_readl(mmu_base + 0x88);
+
+ /*
+ * enable bus-error back
+ */
+ __raw_writel(reg | 0x1, mmu_base + 0x88);
+
+ /*
+ * Enable the MMU IRQs during MMU programming for the
+ * late attachcase. This is to allow the MMU fault to be
+ * detected by the kernel.
+ *
+ * MULTIHITFAULT|EMMUMISS|TRANSLATIONFAULT|TABLEWALKFAULT
+ */
+ __raw_writel(0x1E, mmu_base + 0x1c);
+
+ /*
+ * emutlbupdate|TWLENABLE|MMUENABLE
+ */
+ __raw_writel(0x6, mmu_base + 0x44);
+ }
+
+ return 0;
+}
+
+/**
+ * enum ipu_mem - PRU core memory range identifiers
+ */
+enum ipu_mem {
+ PRU_MEM_IRAM = 0,
+ PRU_MEM_CTRL,
+ PRU_MEM_DEBUG,
+ PRU_MEM_MAX,
+};
+
+static int ipu_start(struct udevice *dev)
+{
+ struct ipu_privdata *priv;
+ struct reset_ctl reset;
+ struct rproc *cfg = NULL;
+ int ret;
+
+ priv = dev_get_priv(dev);
+
+ cfg = rproc_cfg_arr[priv->id];
+ if (cfg->config_peripherals)
+ cfg->config_peripherals(priv->id, cfg);
+
+ /*
+ * Start running the remote core
+ */
+ ret = reset_get_by_index(dev, 0, &reset);
+ if (ret < 0) {
+ dev_err(dev, "%s: error getting reset index %d\n", __func__, 0);
+ return ret;
+ }
+
+ ret = reset_deassert(&reset);
+ if (ret < 0) {
+ dev_err(dev, "%s: error deasserting reset %d\n", __func__, 0);
+ return ret;
+ }
+
+ ret = reset_get_by_index(dev, 1, &reset);
+ if (ret < 0) {
+ dev_err(dev, "%s: error getting reset index %d\n", __func__, 1);
+ return ret;
+ }
+
+ ret = reset_deassert(&reset);
+ if (ret < 0) {
+ dev_err(dev, "%s: error deasserting reset %d\n", __func__, 1);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ipu_stop(struct udevice *dev)
+{
+ return 0;
+}
+
+/**
+ * ipu_init() - Initialize the remote processor
+ * @dev: rproc device pointer
+ *
+ * Return: 0 if all went ok, else return appropriate error
+ */
+static int ipu_init(struct udevice *dev)
+{
+ return 0;
+}
+
+static int ipu_add_res(struct udevice *dev, struct rproc_mem_entry *mapping)
+{
+ struct ipu_privdata *priv = dev_get_priv(dev);
+
+ list_add_tail(&mapping->node, &priv->mappings);
+ return 0;
+}
+
+static int ipu_load(struct udevice *dev, ulong addr, ulong size)
+{
+ Elf32_Ehdr *ehdr; /* Elf header structure pointer */
+ Elf32_Phdr *phdr; /* Program header structure pointer */
+ Elf32_Phdr proghdr;
+ int va;
+ int pa;
+ int i;
+
+ ehdr = (Elf32_Ehdr *)addr;
+ phdr = (Elf32_Phdr *)(addr + ehdr->e_phoff);
+ /*
+ * Load each program header
+ */
+ for (i = 0; i < ehdr->e_phnum; ++i) {
+ memcpy(&proghdr, phdr, sizeof(Elf32_Phdr));
+
+ if (proghdr.p_type != PT_LOAD) {
+ ++phdr;
+ continue;
+ }
+
+ va = proghdr.p_paddr;
+ pa = da_to_pa(dev, va);
+ if (pa)
+ proghdr.p_paddr = pa;
+
+ void *dst = (void *)(uintptr_t)proghdr.p_paddr;
+ void *src = (void *)addr + proghdr.p_offset;
+
+ debug("Loading phdr %i to 0x%p (%i bytes)\n", i, dst,
+ proghdr.p_filesz);
+ if (proghdr.p_filesz)
+ memcpy(dst, src, proghdr.p_filesz);
+
+ flush_cache((unsigned long)dst, proghdr.p_memsz);
+
+ ++phdr;
+ }
+
+ return 0;
+}
+
+static const struct dm_rproc_ops ipu_ops = {
+ .init = ipu_init,
+ .start = ipu_start,
+ .stop = ipu_stop,
+ .load = ipu_load,
+ .add_res = ipu_add_res,
+ .config_pagetable = ipu_config_pagetable,
+ .alloc_mem = ipu_alloc_mem,
+};
+
+/*
+ * If the remotecore binary expects any peripherals to be setup before it has
+ * booted, configure them here.
+ *
+ * These functions are left empty by default as their operation is usecase
+ * specific.
+ */
+
+u32 ipu1_config_peripherals(u32 core_id, struct rproc *cfg)
+{
+ return 0;
+}
+
+u32 ipu2_config_peripherals(u32 core_id, struct rproc *cfg)
+{
+ return 0;
+}
+
+struct rproc_intmem_to_l3_mapping ipu1_intmem_to_l3_mapping = {
+ .num_entries = 1,
+ .mappings = {
+ /*
+ * L2 SRAM
+ */
+ {
+ .priv_addr = 0x55020000,
+ .l3_addr = 0x58820000,
+ .len = (64 * 1024)},
+ }
+};
+
+struct rproc_intmem_to_l3_mapping ipu2_intmem_to_l3_mapping = {
+ .num_entries = 1,
+ .mappings = {
+ /*
+ * L2 SRAM
+ */
+ {
+ .priv_addr = 0x55020000,
+ .l3_addr = 0x55020000,
+ .len = (64 * 1024)},
+ }
+};
+
+struct rproc ipu1_config = {
+ .num_iommus = 1,
+ .mmu_base_addr = {0x58882000, 0},
+ .load_addr = IPU1_LOAD_ADDR,
+ .core_name = "IPU1",
+ .firmware_name = "dra7-ipu1-fw.xem4",
+ .config_mmu = ipu_config_mmu,
+ .config_peripherals = ipu1_config_peripherals,
+ .intmem_to_l3_mapping = &ipu1_intmem_to_l3_mapping
+};
+
+struct rproc ipu2_config = {
+ .num_iommus = 1,
+ .mmu_base_addr = {0x55082000, 0},
+ .load_addr = IPU2_LOAD_ADDR,
+ .core_name = "IPU2",
+ .firmware_name = "dra7-ipu2-fw.xem4",
+ .config_mmu = ipu_config_mmu,
+ .config_peripherals = ipu2_config_peripherals,
+ .intmem_to_l3_mapping = &ipu2_intmem_to_l3_mapping
+};
+
+struct rproc *rproc_cfg_arr[2] = {
+ [IPU2] = &ipu2_config,
+ [IPU1] = &ipu1_config,
+};
+
+u32 spl_pre_boot_core(struct udevice *dev, u32 core_id)
+{
+ struct rproc *cfg = NULL;
+ unsigned long load_elf_status = 0;
+ int tablesz;
+
+ cfg = rproc_cfg_arr[core_id];
+ /*
+ * Check for valid elf image
+ */
+ if (!valid_elf_image(cfg->load_addr))
+ return 1;
+
+ if (rproc_find_resource_table(dev, cfg->load_addr, &tablesz))
+ cfg->has_rsc_table = 1;
+ else
+ cfg->has_rsc_table = 0;
+
+ /*
+ * Configure the MMU
+ */
+ if (cfg->config_mmu && cfg->has_rsc_table)
+ cfg->config_mmu(core_id, cfg);
+
+ /*
+ * Load the remote core. Fill the page table of the first(possibly
+ * only) IOMMU during ELF loading. Copy the page table to the second
+ * IOMMU before running the remote core.
+ */
+
+ page_table_l1 = (unsigned int *)cfg->page_table_addr;
+ page_table_l2 =
+ (unsigned int *)(cfg->page_table_addr + PAGE_TABLE_SIZE_L1);
+ mem_base = cfg->cma_base;
+ mem_size = cfg->cma_size;
+ memset(mem_bitmap, 0x00, sizeof(mem_bitmap));
+ mem_count = (cfg->cma_size >> PAGE_SHIFT);
+
+ /*
+ * Clear variables used for level 2 page table allocation
+ */
+ memset(pgtable_l2_map, 0x00, sizeof(pgtable_l2_map));
+ pgtable_l2_cnt = 0;
+
+ load_elf_status = rproc_parse_resource_table(dev, cfg);
+ if (load_elf_status == 0) {
+ debug("load_elf_image_phdr returned error for core %s\n",
+ cfg->core_name);
+ return 1;
+ }
+
+ flush_cache(cfg->page_table_addr, PAGE_TABLE_SIZE);
+
+ return 0;
+}
+
+static fdt_addr_t ipu_parse_mem_nodes(struct udevice *dev, char *name,
+ int privid, fdt_size_t *sizep)
+{
+ int ret;
+ u32 sp;
+ ofnode mem_node;
+
+ ret = ofnode_read_u32(dev_ofnode(dev), name, &sp);
+ if (ret) {
+ dev_err(dev, "memory-region node fetch failed %d\n", ret);
+ return ret;
+ }
+
+ mem_node = ofnode_get_by_phandle(sp);
+ if (!ofnode_valid(mem_node))
+ return -EINVAL;
+
+ return ofnode_get_addr_size_index(mem_node, 0, sizep);
+}
+
+/**
+ * ipu_probe() - Basic probe
+ * @dev: corresponding k3 remote processor device
+ *
+ * Return: 0 if all goes good, else appropriate error message.
+ */
+static int ipu_probe(struct udevice *dev)
+{
+ struct ipu_privdata *priv;
+ struct rproc *cfg = NULL;
+ struct reset_ctl reset;
+ static const char *const ipu_mem_names[] = { "l2ram" };
+ int ret;
+ fdt_size_t sizep;
+
+ priv = dev_get_priv(dev);
+
+ priv->mem.bus_addr =
+ devfdt_get_addr_size_name(dev,
+ ipu_mem_names[0],
+ (fdt_addr_t *)&priv->mem.size);
+
+ ret = reset_get_by_index(dev, 2, &reset);
+ if (ret < 0) {
+ dev_err(dev, "%s: error getting reset index %d\n", __func__, 2);
+ return ret;
+ }
+
+ ret = reset_deassert(&reset);
+ if (ret < 0) {
+ dev_err(dev, "%s: error deasserting reset %d\n", __func__, 2);
+ return ret;
+ }
+
+ if (priv->mem.bus_addr == FDT_ADDR_T_NONE) {
+ dev_err(dev, "%s bus address not found\n", ipu_mem_names[0]);
+ return -EINVAL;
+ }
+ priv->mem.cpu_addr = map_physmem(priv->mem.bus_addr,
+ priv->mem.size, MAP_NOCACHE);
+
+ if (devfdt_get_addr(dev) == 0x58820000)
+ priv->id = 0;
+ else
+ priv->id = 1;
+
+ cfg = rproc_cfg_arr[priv->id];
+ cfg->cma_base = ipu_parse_mem_nodes(dev, "memory-region", priv->id,
+ &sizep);
+ cfg->cma_size = sizep;
+
+ cfg->page_table_addr = ipu_parse_mem_nodes(dev, "pg-tbl", priv->id,
+ &sizep);
+
+ dev_info(dev,
+ "ID %d memory %8s: bus addr %pa size 0x%zx va %p da 0x%x\n",
+ priv->id, ipu_mem_names[0], &priv->mem.bus_addr,
+ priv->mem.size, priv->mem.cpu_addr, priv->mem.dev_addr);
+
+ INIT_LIST_HEAD(&priv->mappings);
+ if (spl_pre_boot_core(dev, priv->id))
+ return -EINVAL;
+
+ return 0;
+}
+
+static const struct udevice_id ipu_ids[] = {
+ {.compatible = "ti,dra7-ipu"},
+ {}
+};
+
+U_BOOT_DRIVER(ipu) = {
+ .name = "ipu",
+ .of_match = ipu_ids,
+ .id = UCLASS_REMOTEPROC,
+ .ops = &ipu_ops,
+ .probe = ipu_probe,
+ .priv_auto = sizeof(struct ipu_privdata),
+};