/* * Address map functions for Marvell EBU SoCs (Kirkwood, Armada * 370/XP, Dove, Orion5x and MV78xx0) * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. * * The Marvell EBU SoCs have a configurable physical address space: * the physical address at which certain devices (PCIe, NOR, NAND, * etc.) sit can be configured. The configuration takes place through * two sets of registers: * * - One to configure the access of the CPU to the devices. Depending * on the families, there are between 8 and 20 configurable windows, * each can be use to create a physical memory window that maps to a * specific device. Devices are identified by a tuple (target, * attribute). * * - One to configure the access to the CPU to the SDRAM. There are * either 2 (for Dove) or 4 (for other families) windows to map the * SDRAM into the physical address space. * * This driver: * * - Reads out the SDRAM address decoding windows at initialization * time, and fills the mvebu_mbus_dram_info structure with these * informations. The exported function mv_mbus_dram_info() allow * device drivers to get those informations related to the SDRAM * address decoding windows. This is because devices also have their * own windows (configured through registers that are part of each * device register space), and therefore the drivers for Marvell * devices have to configure those device -> SDRAM windows to ensure * that DMA works properly. * * - Provides an API for platform code or device drivers to * dynamically add or remove address decoding windows for the CPU -> * device accesses. This API is mvebu_mbus_add_window(), * mvebu_mbus_add_window_remap_flags() and * mvebu_mbus_del_window(). Since the (target, attribute) values * differ from one SoC family to another, the API uses a 'const char * *' string to identify devices, and this driver is responsible for * knowing the mapping between the name of a device and its * corresponding (target, attribute) in the current SoC family. * * - Provides a debugfs interface in /sys/kernel/debug/mvebu-mbus/ to * see the list of CPU -> SDRAM windows and their configuration * (file 'sdram') and the list of CPU -> devices windows and their * configuration (file 'devices'). */ #include #include #include #include #include #include #include #include #include /* * DDR target is the same on all platforms. */ #define TARGET_DDR 0 /* * CPU Address Decode Windows registers */ #define WIN_CTRL_OFF 0x0000 #define WIN_CTRL_ENABLE BIT(0) #define WIN_CTRL_TGT_MASK 0xf0 #define WIN_CTRL_TGT_SHIFT 4 #define WIN_CTRL_ATTR_MASK 0xff00 #define WIN_CTRL_ATTR_SHIFT 8 #define WIN_CTRL_SIZE_MASK 0xffff0000 #define WIN_CTRL_SIZE_SHIFT 16 #define WIN_BASE_OFF 0x0004 #define WIN_BASE_LOW 0xffff0000 #define WIN_BASE_HIGH 0xf #define WIN_REMAP_LO_OFF 0x0008 #define WIN_REMAP_LOW 0xffff0000 #define WIN_REMAP_HI_OFF 0x000c #define ATTR_HW_COHERENCY (0x1 << 4) #define DDR_BASE_CS_OFF(n) (0x0000 + ((n) << 3)) #define DDR_BASE_CS_HIGH_MASK 0xf #define DDR_BASE_CS_LOW_MASK 0xff000000 #define DDR_SIZE_CS_OFF(n) (0x0004 + ((n) << 3)) #define DDR_SIZE_ENABLED BIT(0) #define DDR_SIZE_CS_MASK 0x1c #define DDR_SIZE_CS_SHIFT 2 #define DDR_SIZE_MASK 0xff000000 #define DOVE_DDR_BASE_CS_OFF(n) ((n) << 4) struct mvebu_mbus_mapping { const char *name; u8 target; u8 attr; u8 attrmask; }; /* * Masks used for the 'attrmask' field of mvebu_mbus_mapping. They * allow to get the real attribute value, discarding the special bits * used to select a PCI MEM region or a PCI WA region. This allows the * debugfs code to reverse-match the name of a device from its * target/attr values. * * For all devices except PCI, all bits of 'attr' must be * considered. For most SoCs, only bit 3 should be ignored (it allows * to select between PCI MEM and PCI I/O). On Orion5x however, there * is the special bit 5 to select a PCI WA region. */ #define MAPDEF_NOMASK 0xff #define MAPDEF_PCIMASK 0xf7 #define MAPDEF_ORIONPCIMASK 0xd7 /* Macro used to define one mvebu_mbus_mapping entry */ #define MAPDEF(__n, __t, __a, __m) \ { .name = __n, .target = __t, .attr = __a, .attrmask = __m } struct mvebu_mbus_state; struct mvebu_mbus_soc_data { unsigned int num_wins; unsigned int num_remappable_wins; unsigned int (*win_cfg_offset)(const int win); void (*setup_cpu_target)(struct mvebu_mbus_state *s); int (*show_cpu_target)(struct mvebu_mbus_state *s, struct seq_file *seq, void *v); const struct mvebu_mbus_mapping *map; }; struct mvebu_mbus_state { void __iomem *mbuswins_base; void __iomem *sdramwins_base; struct dentry *debugfs_root; struct dentry *debugfs_sdram; struct dentry *debugfs_devs; const struct mvebu_mbus_soc_data *soc; int hw_io_coherency; }; static struct mvebu_mbus_state mbus_state; static struct mbus_dram_target_info mvebu_mbus_dram_info; const struct mbus_dram_target_info *mv_mbus_dram_info(void) { return &mvebu_mbus_dram_info; } EXPORT_SYMBOL_GPL(mv_mbus_dram_info); /* * Functions to manipulate the address decoding windows */ static void mvebu_mbus_read_window(struct mvebu_mbus_state *mbus, int win, int *enabled, u64 *base, u32 *size, u8 *target, u8 *attr, u64 *remap) { void __iomem *addr = mbus->mbuswins_base + mbus->soc->win_cfg_offset(win); u32 basereg = readl(addr + WIN_BASE_OFF); u32 ctrlreg = readl(addr + WIN_CTRL_OFF); if (!(ctrlreg & WIN_CTRL_ENABLE)) { *enabled = 0; return; } *enabled = 1; *base = ((u64)basereg & WIN_BASE_HIGH) << 32; *base |= (basereg & WIN_BASE_LOW); *size = (ctrlreg | ~WIN_CTRL_SIZE_MASK) + 1; if (target) *target = (ctrlreg & WIN_CTRL_TGT_MASK) >> WIN_CTRL_TGT_SHIFT; if (attr) *attr = (ctrlreg & WIN_CTRL_ATTR_MASK) >> WIN_CTRL_ATTR_SHIFT; if (remap) { if (win < mbus->soc->num_remappable_wins) { u32 remap_low = readl(addr + WIN_REMAP_LO_OFF); u32 remap_hi = readl(addr + WIN_REMAP_HI_OFF); *remap = ((u64)remap_hi << 32) | remap_low; } else *remap = 0; } } static void mvebu_mbus_disable_window(struct mvebu_mbus_state *mbus, int win) { void __iomem *addr; addr = mbus->mbuswins_base + mbus->soc->win_cfg_offset(win); writel(0, addr + WIN_BASE_OFF); writel(0, addr + WIN_CTRL_OFF); if (win < mbus->soc->num_remappable_wins) { writel(0, addr + WIN_REMAP_LO_OFF); writel(0, addr + WIN_REMAP_HI_OFF); } } /* Checks whether the given window number is available */ static int mvebu_mbus_window_is_free(struct mvebu_mbus_state *mbus, const int win) { void __iomem *addr = mbus->mbuswins_base + mbus->soc->win_cfg_offset(win); u32 ctrl = readl(addr + WIN_CTRL_OFF); return !(ctrl & WIN_CTRL_ENABLE); } /* * Checks whether the given (base, base+size) area doesn't overlap an * existing region */ static int mvebu_mbus_window_conflicts(struct mvebu_mbus_state *mbus, phys_addr_t base, size_t size, u8 target, u8 attr) { u64 end = (u64)base + size; int win; for (win = 0; win < mbus->soc->num_wins; win++) { u64 wbase, wend; u32 wsize; u8 wtarget, wattr; int enabled; mvebu_mbus_read_window(mbus, win, &enabled, &wbase, &wsize, &wtarget, &wattr, NULL); if (!enabled) continue; wend = wbase + wsize; /* * Check if the current window overlaps with the * proposed physical range */ if ((u64)base < wend && end > wbase) return 0; /* * Check if target/attribute conflicts */ if (target == wtarget && attr == wattr) return 0; } return 1; } static int mvebu_mbus_find_window(struct mvebu_mbus_state *mbus, phys_addr_t base, size_t size) { int win; for (win = 0; win < mbus->soc->num_wins; win++) { u64 wbase; u32 wsize; int enabled; mvebu_mbus_read_window(mbus, win, &enabled, &wbase, &wsize, NULL, NULL, NULL); if (!enabled) continue; if (base == wbase && size == wsize) return win; } return -ENODEV; } static int mvebu_mbus_setup_window(struct mvebu_mbus_state *mbus, int win, phys_addr_t base, size_t size, phys_addr_t remap, u8 target, u8 attr) { void __iomem *addr = mbus->mbuswins_base + mbus->soc->win_cfg_offset(win); u32 ctrl, remap_addr; ctrl = ((size - 1) & WIN_CTRL_SIZE_MASK) | (attr << WIN_CTRL_ATTR_SHIFT) | (target << WIN_CTRL_TGT_SHIFT) | WIN_CTRL_ENABLE; writel(base & WIN_BASE_LOW, addr + WIN_BASE_OFF); writel(ctrl, addr + WIN_CTRL_OFF); if (win < mbus->soc->num_remappable_wins) { if (remap == MVEBU_MBUS_NO_REMAP) remap_addr = base; else remap_addr = remap; writel(remap_addr & WIN_REMAP_LOW, addr + WIN_REMAP_LO_OFF); writel(0, addr + WIN_REMAP_HI_OFF); } return 0; } static int mvebu_mbus_alloc_window(struct mvebu_mbus_state *mbus, phys_addr_t base, size_t size, phys_addr_t remap, u8 target, u8 attr) { int win; if (remap == MVEBU_MBUS_NO_REMAP) { for (win = mbus->soc->num_remappable_wins; win < mbus->soc->num_wins; win++) if (mvebu_mbus_window_is_free(mbus, win)) return mvebu_mbus_setup_window(mbus, win, base, size, remap, target, attr); } for (win = 0; win < mbus->soc->num_wins; win++) if (mvebu_mbus_window_is_free(mbus, win)) return mvebu_mbus_setup_window(mbus, win, base, size, remap, target, attr); return -ENOMEM; } /* * Debugfs debugging */ /* Common function used for Dove, Kirkwood, Armada 370/XP and Orion 5x */ static int mvebu_sdram_debug_show_orion(struct mvebu_mbus_state *mbus, struct seq_file *seq, void *v) { int i; for (i = 0; i < 4; i++) { u32 basereg = readl(mbus->sdramwins_base + DDR_BASE_CS_OFF(i)); u32 sizereg = readl(mbus->sdramwins_base + DDR_SIZE_CS_OFF(i)); u64 base; u32 size; if (!(sizereg & DDR_SIZE_ENABLED)) { seq_printf(seq, "[%d] disabled\n", i); continue; } base = ((u64)basereg & DDR_BASE_CS_HIGH_MASK) << 32; base |= basereg & DDR_BASE_CS_LOW_MASK; size = (sizereg | ~DDR_SIZE_MASK); seq_printf(seq, "[%d] %016llx - %016llx : cs%d\n", i, (unsigned long long)base, (unsigned long long)base + size + 1, (sizereg & DDR_SIZE_CS_MASK) >> DDR_SIZE_CS_SHIFT); } return 0; } /* Special function for Dove */ static int mvebu_sdram_debug_show_dove(struct mvebu_mbus_state *mbus, struct seq_file *seq, void *v) { int i; for (i = 0; i < 2; i++) { u32 map = readl(mbus->sdramwins_base + DOVE_DDR_BASE_CS_OFF(i)); u64 base; u32 size; if (!(map & 1)) { seq_printf(seq, "[%d] disabled\n", i); continue; } base = map & 0xff800000; size = 0x100000 << (((map & 0x000f0000) >> 16) - 4); seq_printf(seq, "[%d] %016llx - %016llx : cs%d\n", i, (unsigned long long)base, (unsigned long long)base + size, i); } return 0; } static int mvebu_sdram_debug_show(struct seq_file *seq, void *v) { struct mvebu_mbus_state *mbus = &mbus_state; return mbus->soc->show_cpu_target(mbus, seq, v); } static int mvebu_sdram_debug_open(struct inode *inode, struct file *file) { return single_open(file, mvebu_sdram_debug_show, inode->i_private); } static const struct file_operations mvebu_sdram_debug_fops = { .open = mvebu_sdram_debug_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static int mvebu_devs_debug_show(struct seq_file *seq, void *v) { struct mvebu_mbus_state *mbus = &mbus_state; int win; for (win = 0; win < mbus->soc->num_wins; win++) { u64 wbase, wremap; u32 wsize; u8 wtarget, wattr; int enabled, i; const char *name; mvebu_mbus_read_window(mbus, win, &enabled, &wbase, &wsize, &wtarget, &wattr, &wremap); if (!enabled) { seq_printf(seq, "[%02d] disabled\n", win); continue; } for (i = 0; mbus->soc->map[i].name; i++) if (mbus->soc->map[i].target == wtarget && mbus->soc->map[i].attr == (wattr & mbus->soc->map[i].attrmask)) break; name = mbus->soc->map[i].name ?: "unknown"; seq_printf(seq, "[%02d] %016llx - %016llx : %s", win, (unsigned long long)wbase, (unsigned long long)(wbase + wsize), name); if (win < mbus->soc->num_remappable_wins) { seq_printf(seq, " (remap %016llx)\n", (unsigned long long)wremap); } else seq_printf(seq, "\n"); } return 0; } static int mvebu_devs_debug_open(struct inode *inode, struct file *file) { return single_open(file, mvebu_devs_debug_show, inode->i_private); } static const struct file_operations mvebu_devs_debug_fops = { .open = mvebu_devs_debug_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; /* * SoC-specific functions and definitions */ static unsigned int orion_mbus_win_offset(int win) { return win << 4; } static unsigned int armada_370_xp_mbus_win_offset(int win) { /* The register layout is a bit annoying and the below code * tries to cope with it. * - At offset 0x0, there are the registers for the first 8 * windows, with 4 registers of 32 bits per window (ctrl, * base, remap low, remap high) * - Then at offset 0x80, there is a hole of 0x10 bytes for * the internal registers base address and internal units * sync barrier register. * - Then at offset 0x90, there the registers for 12 * windows, with only 2 registers of 32 bits per window * (ctrl, base). */ if (win < 8) return win << 4; else return 0x90 + ((win - 8) << 3); } static unsigned int mv78xx0_mbus_win_offset(int win) { if (win < 8) return win << 4; else return 0x900 + ((win - 8) << 4); } static void __init mvebu_mbus_default_setup_cpu_target(struct mvebu_mbus_state *mbus) { int i; int cs; mvebu_mbus_dram_info.mbus_dram_target_id = TARGET_DDR; for (i = 0, cs = 0; i < 4; i++) { u32 base = readl(mbus->sdramwins_base + DDR_BASE_CS_OFF(i)); u32 size = readl(mbus->sdramwins_base + DDR_SIZE_CS_OFF(i)); /* * We only take care of entries for which the chip * select is enabled, and that don't have high base * address bits set (devices can only access the first * 32 bits of the memory). */ if ((size & DDR_SIZE_ENABLED) && !(base & DDR_BASE_CS_HIGH_MASK)) { struct mbus_dram_window *w; w = &mvebu_mbus_dram_info.cs[cs++]; w->cs_index = i; w->mbus_attr = 0xf & ~(1 << i); if (mbus->hw_io_coherency) w->mbus_attr |= ATTR_HW_COHERENCY; w->base = base & DDR_BASE_CS_LOW_MASK; w->size = (size | ~DDR_SIZE_MASK) + 1; } } mvebu_mbus_dram_info.num_cs = cs; } static void __init mvebu_mbus_dove_setup_cpu_target(struct mvebu_mbus_state *mbus) { int i; int cs; mvebu_mbus_dram_info.mbus_dram_target_id = TARGET_DDR; for (i = 0, cs = 0; i < 2; i++) { u32 map = readl(mbus->sdramwins_base + DOVE_DDR_BASE_CS_OFF(i)); /* * Chip select enabled? */ if (map & 1) { struct mbus_dram_window *w; w = &mvebu_mbus_dram_info.cs[cs++]; w->cs_index = i; w->mbus_attr = 0; /* CS address decoding done inside */ /* the DDR controller, no need to */ /* provide attributes */ w->base = map & 0xff800000; w->size = 0x100000 << (((map & 0x000f0000) >> 16) - 4); } } mvebu_mbus_dram_info.num_cs = cs; } static const struct mvebu_mbus_mapping armada_370_map[] = { MAPDEF("bootrom", 1, 0xe0, MAPDEF_NOMASK), MAPDEF("devbus-boot", 1, 0x2f, MAPDEF_NOMASK), MAPDEF("devbus-cs0", 1, 0x3e, MAPDEF_NOMASK), MAPDEF("devbus-cs1", 1, 0x3d, MAPDEF_NOMASK), MAPDEF("devbus-cs2", 1, 0x3b, MAPDEF_NOMASK), MAPDEF("devbus-cs3", 1, 0x37, MAPDEF_NOMASK), MAPDEF("pcie0.0", 4, 0xe0, MAPDEF_PCIMASK), MAPDEF("pcie1.0", 8, 0xe0, MAPDEF_PCIMASK), {}, }; static const struct mvebu_mbus_soc_data armada_370_mbus_data = { .num_wins = 20, .num_remappable_wins = 8, .win_cfg_offset = armada_370_xp_mbus_win_offset, .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, .show_cpu_target = mvebu_sdram_debug_show_orion, .map = armada_370_map, }; static const struct mvebu_mbus_mapping armada_xp_map[] = { MAPDEF("bootrom", 1, 0x1d, MAPDEF_NOMASK), MAPDEF("devbus-boot", 1, 0x2f, MAPDEF_NOMASK), MAPDEF("devbus-cs0", 1, 0x3e, MAPDEF_NOMASK), MAPDEF("devbus-cs1", 1, 0x3d, MAPDEF_NOMASK), MAPDEF("devbus-cs2", 1, 0x3b, MAPDEF_NOMASK), MAPDEF("devbus-cs3", 1, 0x37, MAPDEF_NOMASK), MAPDEF("pcie0.0", 4, 0xe0, MAPDEF_PCIMASK), MAPDEF("pcie0.1", 4, 0xd0, MAPDEF_PCIMASK), MAPDEF("pcie0.2", 4, 0xb0, MAPDEF_PCIMASK), MAPDEF("pcie0.3", 4, 0x70, MAPDEF_PCIMASK), MAPDEF("pcie1.0", 8, 0xe0, MAPDEF_PCIMASK), MAPDEF("pcie1.1", 8, 0xd0, MAPDEF_PCIMASK), MAPDEF("pcie1.2", 8, 0xb0, MAPDEF_PCIMASK), MAPDEF("pcie1.3", 8, 0x70, MAPDEF_PCIMASK), MAPDEF("pcie2.0", 4, 0xf0, MAPDEF_PCIMASK), MAPDEF("pcie3.0", 8, 0xf0, MAPDEF_PCIMASK), {}, }; static const struct mvebu_mbus_soc_data armada_xp_mbus_data = { .num_wins = 20, .num_remappable_wins = 8, .win_cfg_offset = armada_370_xp_mbus_win_offset, .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, .show_cpu_target = mvebu_sdram_debug_show_orion, .map = armada_xp_map, }; static const struct mvebu_mbus_mapping kirkwood_map[] = { MAPDEF("pcie0.0", 4, 0xe0, MAPDEF_PCIMASK), MAPDEF("pcie1.0", 8, 0xe0, MAPDEF_PCIMASK), MAPDEF("sram", 3, 0x01, MAPDEF_NOMASK), MAPDEF("nand", 1, 0x2f, MAPDEF_NOMASK), {}, }; static const struct mvebu_mbus_soc_data kirkwood_mbus_data = { .num_wins = 8, .num_remappable_wins = 4, .win_cfg_offset = orion_mbus_win_offset, .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, .show_cpu_target = mvebu_sdram_debug_show_orion, .map = kirkwood_map, }; static const struct mvebu_mbus_mapping dove_map[] = { MAPDEF("pcie0.0", 0x4, 0xe0, MAPDEF_PCIMASK), MAPDEF("pcie1.0", 0x8, 0xe0, MAPDEF_PCIMASK), MAPDEF("cesa", 0x3, 0x01, MAPDEF_NOMASK), MAPDEF("bootrom", 0x1, 0xfd, MAPDEF_NOMASK), MAPDEF("scratchpad", 0xd, 0x0, MAPDEF_NOMASK), {}, }; static const struct mvebu_mbus_soc_data dove_mbus_data = { .num_wins = 8, .num_remappable_wins = 4, .win_cfg_offset = orion_mbus_win_offset, .setup_cpu_target = mvebu_mbus_dove_setup_cpu_target, .show_cpu_target = mvebu_sdram_debug_show_dove, .map = dove_map, }; static const struct mvebu_mbus_mapping orion5x_map[] = { MAPDEF("pcie0.0", 4, 0x51, MAPDEF_ORIONPCIMASK), MAPDEF("pci0.0", 3, 0x51, MAPDEF_ORIONPCIMASK), MAPDEF("devbus-boot", 1, 0x0f, MAPDEF_NOMASK), MAPDEF("devbus-cs0", 1, 0x1e, MAPDEF_NOMASK), MAPDEF("devbus-cs1", 1, 0x1d, MAPDEF_NOMASK), MAPDEF("devbus-cs2", 1, 0x1b, MAPDEF_NOMASK), MAPDEF("sram", 0, 0x00, MAPDEF_NOMASK), {}, }; /* * Some variants of Orion5x have 4 remappable windows, some other have * only two of them. */ static const struct mvebu_mbus_soc_data orion5x_4win_mbus_data = { .num_wins = 8, .num_remappable_wins = 4, .win_cfg_offset = orion_mbus_win_offset, .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, .show_cpu_target = mvebu_sdram_debug_show_orion, .map = orion5x_map, }; static const struct mvebu_mbus_soc_data orion5x_2win_mbus_data = { .num_wins = 8, .num_remappable_wins = 2, .win_cfg_offset = orion_mbus_win_offset, .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, .show_cpu_target = mvebu_sdram_debug_show_orion, .map = orion5x_map, }; static const struct mvebu_mbus_mapping mv78xx0_map[] = { MAPDEF("pcie0.0", 4, 0xe0, MAPDEF_PCIMASK), MAPDEF("pcie0.1", 4, 0xd0, MAPDEF_PCIMASK), MAPDEF("pcie0.2", 4, 0xb0, MAPDEF_PCIMASK), MAPDEF("pcie0.3", 4, 0x70, MAPDEF_PCIMASK), MAPDEF("pcie1.0", 8, 0xe0, MAPDEF_PCIMASK), MAPDEF("pcie1.1", 8, 0xd0, MAPDEF_PCIMASK), MAPDEF("pcie1.2", 8, 0xb0, MAPDEF_PCIMASK), MAPDEF("pcie1.3", 8, 0x70, MAPDEF_PCIMASK), MAPDEF("pcie2.0", 4, 0xf0, MAPDEF_PCIMASK), MAPDEF("pcie3.0", 8, 0xf0, MAPDEF_PCIMASK), {}, }; static const struct mvebu_mbus_soc_data mv78xx0_mbus_data = { .num_wins = 14, .num_remappable_wins = 8, .win_cfg_offset = mv78xx0_mbus_win_offset, .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, .show_cpu_target = mvebu_sdram_debug_show_orion, .map = mv78xx0_map, }; /* * The driver doesn't yet have a DT binding because the details of * this DT binding still need to be sorted out. However, as a * preparation, we already use of_device_id to match a SoC description * string against the SoC specific details of this driver. */ static const struct of_device_id of_mvebu_mbus_ids[] = { { .compatible = "marvell,armada370-mbus", .data = &armada_370_mbus_data, }, { .compatible = "marvell,armadaxp-mbus", .data = &armada_xp_mbus_data, }, { .compatible = "marvell,kirkwood-mbus", .data = &kirkwood_mbus_data, }, { .compatible = "marvell,dove-mbus", .data = &dove_mbus_data, }, { .compatible = "marvell,orion5x-88f5281-mbus", .data = &orion5x_4win_mbus_data, }, { .compatible = "marvell,orion5x-88f5182-mbus", .data = &orion5x_2win_mbus_data, }, { .compatible = "marvell,orion5x-88f5181-mbus", .data = &orion5x_2win_mbus_data, }, { .compatible = "marvell,orion5x-88f6183-mbus", .data = &orion5x_4win_mbus_data, }, { .compatible = "marvell,mv78xx0-mbus", .data = &mv78xx0_mbus_data, }, { }, }; /* * Public API of the driver */ int mvebu_mbus_add_window_remap_flags(const char *devname, phys_addr_t base, size_t size, phys_addr_t remap, unsigned int flags) { struct mvebu_mbus_state *s = &mbus_state; u8 target, attr; int i; if (!s->soc->map) return -ENODEV; for (i = 0; s->soc->map[i].name; i++) if (!strcmp(s->soc->map[i].name, devname)) break; if (!s->soc->map[i].name) { pr_err("mvebu-mbus: unknown device '%s'\n", devname); return -ENODEV; } target = s->soc->map[i].target; attr = s->soc->map[i].attr; if (flags == MVEBU_MBUS_PCI_MEM) attr |= 0x8; else if (flags == MVEBU_MBUS_PCI_WA) attr |= 0x28; if (!mvebu_mbus_window_conflicts(s, base, size, target, attr)) { pr_err("mvebu-mbus: cannot add window '%s', conflicts with another window\n", devname); return -EINVAL; } return mvebu_mbus_alloc_window(s, base, size, remap, target, attr); } int mvebu_mbus_add_window(const char *devname, phys_addr_t base, size_t size) { return mvebu_mbus_add_window_remap_flags(devname, base, size, MVEBU_MBUS_NO_REMAP, 0); } int mvebu_mbus_del_window(phys_addr_t base, size_t size) { int win; win = mvebu_mbus_find_window(&mbus_state, base, size); if (win < 0) return win; mvebu_mbus_disable_window(&mbus_state, win); return 0; } static __init int mvebu_mbus_debugfs_init(void) { struct mvebu_mbus_state *s = &mbus_state; /* * If no base has been initialized, doesn't make sense to * register the debugfs entries. We may be on a multiplatform * kernel that isn't running a Marvell EBU SoC. */ if (!s->mbuswins_base) return 0; s->debugfs_root = debugfs_create_dir("mvebu-mbus", NULL); if (s->debugfs_root) { s->debugfs_sdram = debugfs_create_file("sdram", S_IRUGO, s->debugfs_root, NULL, &mvebu_sdram_debug_fops); s->debugfs_devs = debugfs_create_file("devices", S_IRUGO, s->debugfs_root, NULL, &mvebu_devs_debug_fops); } return 0; } fs_initcall(mvebu_mbus_debugfs_init); int __init mvebu_mbus_init(const char *soc, phys_addr_t mbuswins_phys_base, size_t mbuswins_size, phys_addr_t sdramwins_phys_base, size_t sdramwins_size) { struct mvebu_mbus_state *mbus = &mbus_state; const struct of_device_id *of_id; int win; for (of_id = of_mvebu_mbus_ids; of_id->compatible; of_id++) if (!strcmp(of_id->compatible, soc)) break; if (!of_id->compatible) { pr_err("mvebu-mbus: could not find a matching SoC family\n"); return -ENODEV; } mbus->soc = of_id->data; mbus->mbuswins_base = ioremap(mbuswins_phys_base, mbuswins_size); if (!mbus->mbuswins_base) return -ENOMEM; mbus->sdramwins_base = ioremap(sdramwins_phys_base, sdramwins_size); if (!mbus->sdramwins_base) { iounmap(mbus_state.mbuswins_base); return -ENOMEM; } if (of_find_compatible_node(NULL, NULL, "marvell,coherency-fabric")) mbus->hw_io_coherency = 1; for (win = 0; win < mbus->soc->num_wins; win++) mvebu_mbus_disable_window(mbus, win); mbus->soc->setup_cpu_target(mbus); return 0; }