| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Address map functions for Marvell EBU SoCs (Kirkwood, Armada |
| * 370/XP, Dove, Orion5x and MV78xx0) |
| * |
| * 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 |
| * information. The exported function mv_mbus_dram_info() allow |
| * device drivers to get those information 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_by_id(), |
| * mvebu_mbus_add_window_remap_by_id() and |
| * mvebu_mbus_del_window(). |
| * |
| * - 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'). |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/mbus.h> |
| #include <linux/io.h> |
| #include <linux/ioport.h> |
| #include <linux/of.h> |
| #include <linux/of_address.h> |
| #include <linux/debugfs.h> |
| #include <linux/log2.h> |
| #include <linux/memblock.h> |
| #include <linux/syscore_ops.h> |
| |
| /* |
| * 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) |
| /* Only on HW I/O coherency capable platforms */ |
| #define WIN_CTRL_SYNCBARRIER BIT(1) |
| #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 UNIT_SYNC_BARRIER_OFF 0x84 |
| #define UNIT_SYNC_BARRIER_ALL 0xFFFF |
| |
| #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) |
| |
| /* Relative to mbusbridge_base */ |
| #define MBUS_BRIDGE_CTRL_OFF 0x0 |
| #define MBUS_BRIDGE_BASE_OFF 0x4 |
| |
| /* Maximum number of windows, for all known platforms */ |
| #define MBUS_WINS_MAX 20 |
| |
| struct mvebu_mbus_state; |
| |
| struct mvebu_mbus_soc_data { |
| unsigned int num_wins; |
| bool has_mbus_bridge; |
| unsigned int (*win_cfg_offset)(const int win); |
| unsigned int (*win_remap_offset)(const int win); |
| void (*setup_cpu_target)(struct mvebu_mbus_state *s); |
| int (*save_cpu_target)(struct mvebu_mbus_state *s, |
| u32 __iomem *store_addr); |
| int (*show_cpu_target)(struct mvebu_mbus_state *s, |
| struct seq_file *seq, void *v); |
| }; |
| |
| /* |
| * Used to store the state of one MBus window across suspend/resume. |
| */ |
| struct mvebu_mbus_win_data { |
| u32 ctrl; |
| u32 base; |
| u32 remap_lo; |
| u32 remap_hi; |
| }; |
| |
| struct mvebu_mbus_state { |
| void __iomem *mbuswins_base; |
| void __iomem *sdramwins_base; |
| void __iomem *mbusbridge_base; |
| phys_addr_t sdramwins_phys_base; |
| struct dentry *debugfs_root; |
| struct dentry *debugfs_sdram; |
| struct dentry *debugfs_devs; |
| struct resource pcie_mem_aperture; |
| struct resource pcie_io_aperture; |
| const struct mvebu_mbus_soc_data *soc; |
| int hw_io_coherency; |
| |
| /* Used during suspend/resume */ |
| u32 mbus_bridge_ctrl; |
| u32 mbus_bridge_base; |
| struct mvebu_mbus_win_data wins[MBUS_WINS_MAX]; |
| }; |
| |
| static struct mvebu_mbus_state mbus_state; |
| |
| /* |
| * We provide two variants of the mv_mbus_dram_info() function: |
| * |
| * - The normal one, where the described DRAM ranges may overlap with |
| * the I/O windows, but for which the DRAM ranges are guaranteed to |
| * have a power of two size. Such ranges are suitable for the DMA |
| * masters that only DMA between the RAM and the device, which is |
| * actually all devices except the crypto engines. |
| * |
| * - The 'nooverlap' one, where the described DRAM ranges are |
| * guaranteed to not overlap with the I/O windows, but for which the |
| * DRAM ranges will not have power of two sizes. They will only be |
| * aligned on a 64 KB boundary, and have a size multiple of 64 |
| * KB. Such ranges are suitable for the DMA masters that DMA between |
| * the crypto SRAM (which is mapped through an I/O window) and a |
| * device. This is the case for the crypto engines. |
| */ |
| |
| static struct mbus_dram_target_info mvebu_mbus_dram_info; |
| static struct mbus_dram_target_info mvebu_mbus_dram_info_nooverlap; |
| |
| const struct mbus_dram_target_info *mv_mbus_dram_info(void) |
| { |
| return &mvebu_mbus_dram_info; |
| } |
| EXPORT_SYMBOL_GPL(mv_mbus_dram_info); |
| |
| const struct mbus_dram_target_info *mv_mbus_dram_info_nooverlap(void) |
| { |
| return &mvebu_mbus_dram_info_nooverlap; |
| } |
| EXPORT_SYMBOL_GPL(mv_mbus_dram_info_nooverlap); |
| |
| /* Checks whether the given window has remap capability */ |
| static bool mvebu_mbus_window_is_remappable(struct mvebu_mbus_state *mbus, |
| const int win) |
| { |
| return mbus->soc->win_remap_offset(win) != MVEBU_MBUS_NO_REMAP; |
| } |
| |
| /* |
| * 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 (mvebu_mbus_window_is_remappable(mbus, win)) { |
| u32 remap_low, remap_hi; |
| void __iomem *addr_rmp = mbus->mbuswins_base + |
| mbus->soc->win_remap_offset(win); |
| remap_low = readl(addr_rmp + WIN_REMAP_LO_OFF); |
| remap_hi = readl(addr_rmp + 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 (mvebu_mbus_window_is_remappable(mbus, win)) { |
| addr = mbus->mbuswins_base + mbus->soc->win_remap_offset(win); |
| 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; |
| } |
| |
| 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; |
| |
| if (!is_power_of_2(size)) { |
| WARN(true, "Invalid MBus window size: 0x%zx\n", size); |
| return -EINVAL; |
| } |
| |
| if ((base & (phys_addr_t)(size - 1)) != 0) { |
| WARN(true, "Invalid MBus base/size: %pa len 0x%zx\n", &base, |
| size); |
| return -EINVAL; |
| } |
| |
| ctrl = ((size - 1) & WIN_CTRL_SIZE_MASK) | |
| (attr << WIN_CTRL_ATTR_SHIFT) | |
| (target << WIN_CTRL_TGT_SHIFT) | |
| WIN_CTRL_ENABLE; |
| if (mbus->hw_io_coherency) |
| ctrl |= WIN_CTRL_SYNCBARRIER; |
| |
| writel(base & WIN_BASE_LOW, addr + WIN_BASE_OFF); |
| writel(ctrl, addr + WIN_CTRL_OFF); |
| |
| if (mvebu_mbus_window_is_remappable(mbus, win)) { |
| void __iomem *addr_rmp = mbus->mbuswins_base + |
| mbus->soc->win_remap_offset(win); |
| |
| if (remap == MVEBU_MBUS_NO_REMAP) |
| remap_addr = base; |
| else |
| remap_addr = remap; |
| writel(remap_addr & WIN_REMAP_LOW, addr_rmp + WIN_REMAP_LO_OFF); |
| writel(0, addr_rmp + 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 = 0; win < mbus->soc->num_wins; win++) { |
| if (mvebu_mbus_window_is_remappable(mbus, win)) |
| continue; |
| |
| 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++) { |
| /* Skip window if need remap but is not supported */ |
| if ((remap != MVEBU_MBUS_NO_REMAP) && |
| !mvebu_mbus_window_is_remappable(mbus, win)) |
| continue; |
| |
| 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; |
| |
| mvebu_mbus_read_window(mbus, win, |
| &enabled, &wbase, &wsize, |
| &wtarget, &wattr, &wremap); |
| |
| if (!enabled) { |
| seq_printf(seq, "[%02d] disabled\n", win); |
| continue; |
| } |
| |
| seq_printf(seq, "[%02d] %016llx - %016llx : %04x:%04x", |
| win, (unsigned long long)wbase, |
| (unsigned long long)(wbase + wsize), wtarget, wattr); |
| |
| if (!is_power_of_2(wsize) || |
| ((wbase & (u64)(wsize - 1)) != 0)) |
| seq_puts(seq, " (Invalid base/size!!)"); |
| |
| if (mvebu_mbus_window_is_remappable(mbus, win)) { |
| 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 generic_mbus_win_cfg_offset(int win) |
| { |
| return win << 4; |
| } |
| |
| static unsigned int armada_370_xp_mbus_win_cfg_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_cfg_offset(int win) |
| { |
| if (win < 8) |
| return win << 4; |
| else |
| return 0x900 + ((win - 8) << 4); |
| } |
| |
| static unsigned int generic_mbus_win_remap_2_offset(int win) |
| { |
| if (win < 2) |
| return generic_mbus_win_cfg_offset(win); |
| else |
| return MVEBU_MBUS_NO_REMAP; |
| } |
| |
| static unsigned int generic_mbus_win_remap_4_offset(int win) |
| { |
| if (win < 4) |
| return generic_mbus_win_cfg_offset(win); |
| else |
| return MVEBU_MBUS_NO_REMAP; |
| } |
| |
| static unsigned int generic_mbus_win_remap_8_offset(int win) |
| { |
| if (win < 8) |
| return generic_mbus_win_cfg_offset(win); |
| else |
| return MVEBU_MBUS_NO_REMAP; |
| } |
| |
| static unsigned int armada_xp_mbus_win_remap_offset(int win) |
| { |
| if (win < 8) |
| return generic_mbus_win_cfg_offset(win); |
| else if (win == 13) |
| return 0xF0 - WIN_REMAP_LO_OFF; |
| else |
| return MVEBU_MBUS_NO_REMAP; |
| } |
| |
| /* |
| * Use the memblock information to find the MBus bridge hole in the |
| * physical address space. |
| */ |
| static void __init |
| mvebu_mbus_find_bridge_hole(uint64_t *start, uint64_t *end) |
| { |
| phys_addr_t reg_start, reg_end; |
| uint64_t i, s = 0; |
| |
| for_each_mem_range(i, ®_start, ®_end) { |
| /* |
| * This part of the memory is above 4 GB, so we don't |
| * care for the MBus bridge hole. |
| */ |
| if ((u64)reg_start >= 0x100000000ULL) |
| continue; |
| |
| /* |
| * The MBus bridge hole is at the end of the RAM under |
| * the 4 GB limit. |
| */ |
| if (reg_end > s) |
| s = reg_end; |
| } |
| |
| *start = s; |
| *end = 0x100000000ULL; |
| } |
| |
| /* |
| * This function fills in the mvebu_mbus_dram_info_nooverlap data |
| * structure, by looking at the mvebu_mbus_dram_info data, and |
| * removing the parts of it that overlap with I/O windows. |
| */ |
| static void __init |
| mvebu_mbus_setup_cpu_target_nooverlap(struct mvebu_mbus_state *mbus) |
| { |
| uint64_t mbus_bridge_base, mbus_bridge_end; |
| int cs_nooverlap = 0; |
| int i; |
| |
| mvebu_mbus_find_bridge_hole(&mbus_bridge_base, &mbus_bridge_end); |
| |
| for (i = 0; i < mvebu_mbus_dram_info.num_cs; i++) { |
| struct mbus_dram_window *w; |
| u64 base, size, end; |
| |
| w = &mvebu_mbus_dram_info.cs[i]; |
| base = w->base; |
| size = w->size; |
| end = base + size; |
| |
| /* |
| * The CS is fully enclosed inside the MBus bridge |
| * area, so ignore it. |
| */ |
| if (base >= mbus_bridge_base && end <= mbus_bridge_end) |
| continue; |
| |
| /* |
| * Beginning of CS overlaps with end of MBus, raise CS |
| * base address, and shrink its size. |
| */ |
| if (base >= mbus_bridge_base && end > mbus_bridge_end) { |
| size -= mbus_bridge_end - base; |
| base = mbus_bridge_end; |
| } |
| |
| /* |
| * End of CS overlaps with beginning of MBus, shrink |
| * CS size. |
| */ |
| if (base < mbus_bridge_base && end > mbus_bridge_base) |
| size -= end - mbus_bridge_base; |
| |
| w = &mvebu_mbus_dram_info_nooverlap.cs[cs_nooverlap++]; |
| w->cs_index = i; |
| w->mbus_attr = 0xf & ~(1 << i); |
| if (mbus->hw_io_coherency) |
| w->mbus_attr |= ATTR_HW_COHERENCY; |
| w->base = base; |
| w->size = size; |
| } |
| |
| mvebu_mbus_dram_info_nooverlap.mbus_dram_target_id = TARGET_DDR; |
| mvebu_mbus_dram_info_nooverlap.num_cs = cs_nooverlap; |
| } |
| |
| 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 = (u64)(size | ~DDR_SIZE_MASK) + 1; |
| } |
| } |
| mvebu_mbus_dram_info.num_cs = cs; |
| } |
| |
| static int |
| mvebu_mbus_default_save_cpu_target(struct mvebu_mbus_state *mbus, |
| u32 __iomem *store_addr) |
| { |
| int i; |
| |
| for (i = 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)); |
| |
| writel(mbus->sdramwins_phys_base + DDR_BASE_CS_OFF(i), |
| store_addr++); |
| writel(base, store_addr++); |
| writel(mbus->sdramwins_phys_base + DDR_SIZE_CS_OFF(i), |
| store_addr++); |
| writel(size, store_addr++); |
| } |
| |
| /* We've written 16 words to the store address */ |
| return 16; |
| } |
| |
| 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 int |
| mvebu_mbus_dove_save_cpu_target(struct mvebu_mbus_state *mbus, |
| u32 __iomem *store_addr) |
| { |
| int i; |
| |
| for (i = 0; i < 2; i++) { |
| u32 map = readl(mbus->sdramwins_base + DOVE_DDR_BASE_CS_OFF(i)); |
| |
| writel(mbus->sdramwins_phys_base + DOVE_DDR_BASE_CS_OFF(i), |
| store_addr++); |
| writel(map, store_addr++); |
| } |
| |
| /* We've written 4 words to the store address */ |
| return 4; |
| } |
| |
| int mvebu_mbus_save_cpu_target(u32 __iomem *store_addr) |
| { |
| return mbus_state.soc->save_cpu_target(&mbus_state, store_addr); |
| } |
| |
| static const struct mvebu_mbus_soc_data armada_370_mbus_data = { |
| .num_wins = 20, |
| .has_mbus_bridge = true, |
| .win_cfg_offset = armada_370_xp_mbus_win_cfg_offset, |
| .win_remap_offset = generic_mbus_win_remap_8_offset, |
| .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, |
| .show_cpu_target = mvebu_sdram_debug_show_orion, |
| .save_cpu_target = mvebu_mbus_default_save_cpu_target, |
| }; |
| |
| static const struct mvebu_mbus_soc_data armada_xp_mbus_data = { |
| .num_wins = 20, |
| .has_mbus_bridge = true, |
| .win_cfg_offset = armada_370_xp_mbus_win_cfg_offset, |
| .win_remap_offset = armada_xp_mbus_win_remap_offset, |
| .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, |
| .show_cpu_target = mvebu_sdram_debug_show_orion, |
| .save_cpu_target = mvebu_mbus_default_save_cpu_target, |
| }; |
| |
| static const struct mvebu_mbus_soc_data kirkwood_mbus_data = { |
| .num_wins = 8, |
| .win_cfg_offset = generic_mbus_win_cfg_offset, |
| .save_cpu_target = mvebu_mbus_default_save_cpu_target, |
| .win_remap_offset = generic_mbus_win_remap_4_offset, |
| .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, |
| .show_cpu_target = mvebu_sdram_debug_show_orion, |
| }; |
| |
| static const struct mvebu_mbus_soc_data dove_mbus_data = { |
| .num_wins = 8, |
| .win_cfg_offset = generic_mbus_win_cfg_offset, |
| .save_cpu_target = mvebu_mbus_dove_save_cpu_target, |
| .win_remap_offset = generic_mbus_win_remap_4_offset, |
| .setup_cpu_target = mvebu_mbus_dove_setup_cpu_target, |
| .show_cpu_target = mvebu_sdram_debug_show_dove, |
| }; |
| |
| /* |
| * 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, |
| .win_cfg_offset = generic_mbus_win_cfg_offset, |
| .save_cpu_target = mvebu_mbus_default_save_cpu_target, |
| .win_remap_offset = generic_mbus_win_remap_4_offset, |
| .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, |
| .show_cpu_target = mvebu_sdram_debug_show_orion, |
| }; |
| |
| static const struct mvebu_mbus_soc_data orion5x_2win_mbus_data = { |
| .num_wins = 8, |
| .win_cfg_offset = generic_mbus_win_cfg_offset, |
| .save_cpu_target = mvebu_mbus_default_save_cpu_target, |
| .win_remap_offset = generic_mbus_win_remap_2_offset, |
| .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, |
| .show_cpu_target = mvebu_sdram_debug_show_orion, |
| }; |
| |
| static const struct mvebu_mbus_soc_data mv78xx0_mbus_data = { |
| .num_wins = 14, |
| .win_cfg_offset = mv78xx0_mbus_win_cfg_offset, |
| .save_cpu_target = mvebu_mbus_default_save_cpu_target, |
| .win_remap_offset = generic_mbus_win_remap_8_offset, |
| .setup_cpu_target = mvebu_mbus_default_setup_cpu_target, |
| .show_cpu_target = mvebu_sdram_debug_show_orion, |
| }; |
| |
| static const struct of_device_id of_mvebu_mbus_ids[] = { |
| { .compatible = "marvell,armada370-mbus", |
| .data = &armada_370_mbus_data, }, |
| { .compatible = "marvell,armada375-mbus", |
| .data = &armada_xp_mbus_data, }, |
| { .compatible = "marvell,armada380-mbus", |
| .data = &armada_xp_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_by_id(unsigned int target, |
| unsigned int attribute, |
| phys_addr_t base, size_t size, |
| phys_addr_t remap) |
| { |
| struct mvebu_mbus_state *s = &mbus_state; |
| |
| if (!mvebu_mbus_window_conflicts(s, base, size, target, attribute)) { |
| pr_err("cannot add window '%x:%x', conflicts with another window\n", |
| target, attribute); |
| return -EINVAL; |
| } |
| |
| return mvebu_mbus_alloc_window(s, base, size, remap, target, attribute); |
| } |
| EXPORT_SYMBOL_GPL(mvebu_mbus_add_window_remap_by_id); |
| |
| int mvebu_mbus_add_window_by_id(unsigned int target, unsigned int attribute, |
| phys_addr_t base, size_t size) |
| { |
| return mvebu_mbus_add_window_remap_by_id(target, attribute, base, |
| size, MVEBU_MBUS_NO_REMAP); |
| } |
| EXPORT_SYMBOL_GPL(mvebu_mbus_add_window_by_id); |
| |
| 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; |
| } |
| EXPORT_SYMBOL_GPL(mvebu_mbus_del_window); |
| |
| void mvebu_mbus_get_pcie_mem_aperture(struct resource *res) |
| { |
| if (!res) |
| return; |
| *res = mbus_state.pcie_mem_aperture; |
| } |
| EXPORT_SYMBOL_GPL(mvebu_mbus_get_pcie_mem_aperture); |
| |
| void mvebu_mbus_get_pcie_io_aperture(struct resource *res) |
| { |
| if (!res) |
| return; |
| *res = mbus_state.pcie_io_aperture; |
| } |
| EXPORT_SYMBOL_GPL(mvebu_mbus_get_pcie_io_aperture); |
| |
| int mvebu_mbus_get_dram_win_info(phys_addr_t phyaddr, u8 *target, u8 *attr) |
| { |
| const struct mbus_dram_target_info *dram; |
| int i; |
| |
| /* Get dram info */ |
| dram = mv_mbus_dram_info(); |
| if (!dram) { |
| pr_err("missing DRAM information\n"); |
| return -ENODEV; |
| } |
| |
| /* Try to find matching DRAM window for phyaddr */ |
| for (i = 0; i < dram->num_cs; i++) { |
| const struct mbus_dram_window *cs = dram->cs + i; |
| |
| if (cs->base <= phyaddr && |
| phyaddr <= (cs->base + cs->size - 1)) { |
| *target = dram->mbus_dram_target_id; |
| *attr = cs->mbus_attr; |
| return 0; |
| } |
| } |
| |
| pr_err("invalid dram address %pa\n", &phyaddr); |
| return -EINVAL; |
| } |
| EXPORT_SYMBOL_GPL(mvebu_mbus_get_dram_win_info); |
| |
| int mvebu_mbus_get_io_win_info(phys_addr_t phyaddr, u32 *size, u8 *target, |
| u8 *attr) |
| { |
| int win; |
| |
| for (win = 0; win < mbus_state.soc->num_wins; win++) { |
| u64 wbase; |
| int enabled; |
| |
| mvebu_mbus_read_window(&mbus_state, win, &enabled, &wbase, |
| size, target, attr, NULL); |
| |
| if (!enabled) |
| continue; |
| |
| if (wbase <= phyaddr && phyaddr <= wbase + *size) |
| return win; |
| } |
| |
| return -EINVAL; |
| } |
| EXPORT_SYMBOL_GPL(mvebu_mbus_get_io_win_info); |
| |
| 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); |
| |
| static int mvebu_mbus_suspend(void) |
| { |
| struct mvebu_mbus_state *s = &mbus_state; |
| int win; |
| |
| if (!s->mbusbridge_base) |
| return -ENODEV; |
| |
| for (win = 0; win < s->soc->num_wins; win++) { |
| void __iomem *addr = s->mbuswins_base + |
| s->soc->win_cfg_offset(win); |
| void __iomem *addr_rmp; |
| |
| s->wins[win].base = readl(addr + WIN_BASE_OFF); |
| s->wins[win].ctrl = readl(addr + WIN_CTRL_OFF); |
| |
| if (!mvebu_mbus_window_is_remappable(s, win)) |
| continue; |
| |
| addr_rmp = s->mbuswins_base + |
| s->soc->win_remap_offset(win); |
| |
| s->wins[win].remap_lo = readl(addr_rmp + WIN_REMAP_LO_OFF); |
| s->wins[win].remap_hi = readl(addr_rmp + WIN_REMAP_HI_OFF); |
| } |
| |
| s->mbus_bridge_ctrl = readl(s->mbusbridge_base + |
| MBUS_BRIDGE_CTRL_OFF); |
| s->mbus_bridge_base = readl(s->mbusbridge_base + |
| MBUS_BRIDGE_BASE_OFF); |
| |
| return 0; |
| } |
| |
| static void mvebu_mbus_resume(void) |
| { |
| struct mvebu_mbus_state *s = &mbus_state; |
| int win; |
| |
| writel(s->mbus_bridge_ctrl, |
| s->mbusbridge_base + MBUS_BRIDGE_CTRL_OFF); |
| writel(s->mbus_bridge_base, |
| s->mbusbridge_base + MBUS_BRIDGE_BASE_OFF); |
| |
| for (win = 0; win < s->soc->num_wins; win++) { |
| void __iomem *addr = s->mbuswins_base + |
| s->soc->win_cfg_offset(win); |
| void __iomem *addr_rmp; |
| |
| writel(s->wins[win].base, addr + WIN_BASE_OFF); |
| writel(s->wins[win].ctrl, addr + WIN_CTRL_OFF); |
| |
| if (!mvebu_mbus_window_is_remappable(s, win)) |
| continue; |
| |
| addr_rmp = s->mbuswins_base + |
| s->soc->win_remap_offset(win); |
| |
| writel(s->wins[win].remap_lo, addr_rmp + WIN_REMAP_LO_OFF); |
| writel(s->wins[win].remap_hi, addr_rmp + WIN_REMAP_HI_OFF); |
| } |
| } |
| |
| static struct syscore_ops mvebu_mbus_syscore_ops = { |
| .suspend = mvebu_mbus_suspend, |
| .resume = mvebu_mbus_resume, |
| }; |
| |
| static int __init mvebu_mbus_common_init(struct mvebu_mbus_state *mbus, |
| phys_addr_t mbuswins_phys_base, |
| size_t mbuswins_size, |
| phys_addr_t sdramwins_phys_base, |
| size_t sdramwins_size, |
| phys_addr_t mbusbridge_phys_base, |
| size_t mbusbridge_size, |
| bool is_coherent) |
| { |
| int win; |
| |
| 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->mbuswins_base); |
| return -ENOMEM; |
| } |
| |
| mbus->sdramwins_phys_base = sdramwins_phys_base; |
| |
| if (mbusbridge_phys_base) { |
| mbus->mbusbridge_base = ioremap(mbusbridge_phys_base, |
| mbusbridge_size); |
| if (!mbus->mbusbridge_base) { |
| iounmap(mbus->sdramwins_base); |
| iounmap(mbus->mbuswins_base); |
| return -ENOMEM; |
| } |
| } else |
| mbus->mbusbridge_base = NULL; |
| |
| for (win = 0; win < mbus->soc->num_wins; win++) |
| mvebu_mbus_disable_window(mbus, win); |
| |
| mbus->soc->setup_cpu_target(mbus); |
| mvebu_mbus_setup_cpu_target_nooverlap(mbus); |
| |
| if (is_coherent) |
| writel(UNIT_SYNC_BARRIER_ALL, |
| mbus->mbuswins_base + UNIT_SYNC_BARRIER_OFF); |
| |
| register_syscore_ops(&mvebu_mbus_syscore_ops); |
| |
| return 0; |
| } |
| |
| 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) |
| { |
| const struct of_device_id *of_id; |
| |
| for (of_id = of_mvebu_mbus_ids; of_id->compatible[0]; of_id++) |
| if (!strcmp(of_id->compatible, soc)) |
| break; |
| |
| if (!of_id->compatible[0]) { |
| pr_err("could not find a matching SoC family\n"); |
| return -ENODEV; |
| } |
| |
| mbus_state.soc = of_id->data; |
| |
| return mvebu_mbus_common_init(&mbus_state, |
| mbuswins_phys_base, |
| mbuswins_size, |
| sdramwins_phys_base, |
| sdramwins_size, 0, 0, false); |
| } |
| |
| #ifdef CONFIG_OF |
| /* |
| * The window IDs in the ranges DT property have the following format: |
| * - bits 28 to 31: MBus custom field |
| * - bits 24 to 27: window target ID |
| * - bits 16 to 23: window attribute ID |
| * - bits 0 to 15: unused |
| */ |
| #define CUSTOM(id) (((id) & 0xF0000000) >> 24) |
| #define TARGET(id) (((id) & 0x0F000000) >> 24) |
| #define ATTR(id) (((id) & 0x00FF0000) >> 16) |
| |
| static int __init mbus_dt_setup_win(struct mvebu_mbus_state *mbus, |
| u32 base, u32 size, |
| u8 target, u8 attr) |
| { |
| if (!mvebu_mbus_window_conflicts(mbus, base, size, target, attr)) { |
| pr_err("cannot add window '%04x:%04x', conflicts with another window\n", |
| target, attr); |
| return -EBUSY; |
| } |
| |
| if (mvebu_mbus_alloc_window(mbus, base, size, MVEBU_MBUS_NO_REMAP, |
| target, attr)) { |
| pr_err("cannot add window '%04x:%04x', too many windows\n", |
| target, attr); |
| return -ENOMEM; |
| } |
| return 0; |
| } |
| |
| static int __init |
| mbus_parse_ranges(struct device_node *node, |
| int *addr_cells, int *c_addr_cells, int *c_size_cells, |
| int *cell_count, const __be32 **ranges_start, |
| const __be32 **ranges_end) |
| { |
| const __be32 *prop; |
| int ranges_len, tuple_len; |
| |
| /* Allow a node with no 'ranges' property */ |
| *ranges_start = of_get_property(node, "ranges", &ranges_len); |
| if (*ranges_start == NULL) { |
| *addr_cells = *c_addr_cells = *c_size_cells = *cell_count = 0; |
| *ranges_start = *ranges_end = NULL; |
| return 0; |
| } |
| *ranges_end = *ranges_start + ranges_len / sizeof(__be32); |
| |
| *addr_cells = of_n_addr_cells(node); |
| |
| prop = of_get_property(node, "#address-cells", NULL); |
| *c_addr_cells = be32_to_cpup(prop); |
| |
| prop = of_get_property(node, "#size-cells", NULL); |
| *c_size_cells = be32_to_cpup(prop); |
| |
| *cell_count = *addr_cells + *c_addr_cells + *c_size_cells; |
| tuple_len = (*cell_count) * sizeof(__be32); |
| |
| if (ranges_len % tuple_len) { |
| pr_warn("malformed ranges entry '%pOFn'\n", node); |
| return -EINVAL; |
| } |
| return 0; |
| } |
| |
| static int __init mbus_dt_setup(struct mvebu_mbus_state *mbus, |
| struct device_node *np) |
| { |
| int addr_cells, c_addr_cells, c_size_cells; |
| int i, ret, cell_count; |
| const __be32 *r, *ranges_start, *ranges_end; |
| |
| ret = mbus_parse_ranges(np, &addr_cells, &c_addr_cells, |
| &c_size_cells, &cell_count, |
| &ranges_start, &ranges_end); |
| if (ret < 0) |
| return ret; |
| |
| for (i = 0, r = ranges_start; r < ranges_end; r += cell_count, i++) { |
| u32 windowid, base, size; |
| u8 target, attr; |
| |
| /* |
| * An entry with a non-zero custom field do not |
| * correspond to a static window, so skip it. |
| */ |
| windowid = of_read_number(r, 1); |
| if (CUSTOM(windowid)) |
| continue; |
| |
| target = TARGET(windowid); |
| attr = ATTR(windowid); |
| |
| base = of_read_number(r + c_addr_cells, addr_cells); |
| size = of_read_number(r + c_addr_cells + addr_cells, |
| c_size_cells); |
| ret = mbus_dt_setup_win(mbus, base, size, target, attr); |
| if (ret < 0) |
| return ret; |
| } |
| return 0; |
| } |
| |
| static void __init mvebu_mbus_get_pcie_resources(struct device_node *np, |
| struct resource *mem, |
| struct resource *io) |
| { |
| u32 reg[2]; |
| int ret; |
| |
| /* |
| * These are optional, so we make sure that resource_size(x) will |
| * return 0. |
| */ |
| memset(mem, 0, sizeof(struct resource)); |
| mem->end = -1; |
| memset(io, 0, sizeof(struct resource)); |
| io->end = -1; |
| |
| ret = of_property_read_u32_array(np, "pcie-mem-aperture", reg, ARRAY_SIZE(reg)); |
| if (!ret) { |
| mem->start = reg[0]; |
| mem->end = mem->start + reg[1] - 1; |
| mem->flags = IORESOURCE_MEM; |
| } |
| |
| ret = of_property_read_u32_array(np, "pcie-io-aperture", reg, ARRAY_SIZE(reg)); |
| if (!ret) { |
| io->start = reg[0]; |
| io->end = io->start + reg[1] - 1; |
| io->flags = IORESOURCE_IO; |
| } |
| } |
| |
| int __init mvebu_mbus_dt_init(bool is_coherent) |
| { |
| struct resource mbuswins_res, sdramwins_res, mbusbridge_res; |
| struct device_node *np, *controller; |
| const struct of_device_id *of_id; |
| const __be32 *prop; |
| int ret; |
| |
| np = of_find_matching_node_and_match(NULL, of_mvebu_mbus_ids, &of_id); |
| if (!np) { |
| pr_err("could not find a matching SoC family\n"); |
| return -ENODEV; |
| } |
| |
| mbus_state.soc = of_id->data; |
| |
| prop = of_get_property(np, "controller", NULL); |
| if (!prop) { |
| pr_err("required 'controller' property missing\n"); |
| return -EINVAL; |
| } |
| |
| controller = of_find_node_by_phandle(be32_to_cpup(prop)); |
| if (!controller) { |
| pr_err("could not find an 'mbus-controller' node\n"); |
| return -ENODEV; |
| } |
| |
| if (of_address_to_resource(controller, 0, &mbuswins_res)) { |
| pr_err("cannot get MBUS register address\n"); |
| return -EINVAL; |
| } |
| |
| if (of_address_to_resource(controller, 1, &sdramwins_res)) { |
| pr_err("cannot get SDRAM register address\n"); |
| return -EINVAL; |
| } |
| |
| /* |
| * Set the resource to 0 so that it can be left unmapped by |
| * mvebu_mbus_common_init() if the DT doesn't carry the |
| * necessary information. This is needed to preserve backward |
| * compatibility. |
| */ |
| memset(&mbusbridge_res, 0, sizeof(mbusbridge_res)); |
| |
| if (mbus_state.soc->has_mbus_bridge) { |
| if (of_address_to_resource(controller, 2, &mbusbridge_res)) |
| pr_warn(FW_WARN "deprecated mbus-mvebu Device Tree, suspend/resume will not work\n"); |
| } |
| |
| mbus_state.hw_io_coherency = is_coherent; |
| |
| /* Get optional pcie-{mem,io}-aperture properties */ |
| mvebu_mbus_get_pcie_resources(np, &mbus_state.pcie_mem_aperture, |
| &mbus_state.pcie_io_aperture); |
| |
| ret = mvebu_mbus_common_init(&mbus_state, |
| mbuswins_res.start, |
| resource_size(&mbuswins_res), |
| sdramwins_res.start, |
| resource_size(&sdramwins_res), |
| mbusbridge_res.start, |
| resource_size(&mbusbridge_res), |
| is_coherent); |
| if (ret) |
| return ret; |
| |
| /* Setup statically declared windows in the DT */ |
| return mbus_dt_setup(&mbus_state, np); |
| } |
| #endif |