2 * Address map functions for Marvell EBU SoCs (Kirkwood, Armada
3 * 370/XP, Dove, Orion5x and MV78xx0)
5 * This file is licensed under the terms of the GNU General Public
6 * License version 2. This program is licensed "as is" without any
7 * warranty of any kind, whether express or implied.
9 * The Marvell EBU SoCs have a configurable physical address space:
10 * the physical address at which certain devices (PCIe, NOR, NAND,
11 * etc.) sit can be configured. The configuration takes place through
12 * two sets of registers:
14 * - One to configure the access of the CPU to the devices. Depending
15 * on the families, there are between 8 and 20 configurable windows,
16 * each can be use to create a physical memory window that maps to a
17 * specific device. Devices are identified by a tuple (target,
20 * - One to configure the access to the CPU to the SDRAM. There are
21 * either 2 (for Dove) or 4 (for other families) windows to map the
22 * SDRAM into the physical address space.
26 * - Reads out the SDRAM address decoding windows at initialization
27 * time, and fills the mvebu_mbus_dram_info structure with these
28 * informations. The exported function mv_mbus_dram_info() allow
29 * device drivers to get those informations related to the SDRAM
30 * address decoding windows. This is because devices also have their
31 * own windows (configured through registers that are part of each
32 * device register space), and therefore the drivers for Marvell
33 * devices have to configure those device -> SDRAM windows to ensure
34 * that DMA works properly.
36 * - Provides an API for platform code or device drivers to
37 * dynamically add or remove address decoding windows for the CPU ->
38 * device accesses. This API is mvebu_mbus_add_window_by_id(),
39 * mvebu_mbus_add_window_remap_by_id() and
40 * mvebu_mbus_del_window().
42 * - Provides a debugfs interface in /sys/kernel/debug/mvebu-mbus/ to
43 * see the list of CPU -> SDRAM windows and their configuration
44 * (file 'sdram') and the list of CPU -> devices windows and their
45 * configuration (file 'devices').
48 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/init.h>
53 #include <linux/mbus.h>
55 #include <linux/ioport.h>
57 #include <linux/of_address.h>
58 #include <linux/debugfs.h>
59 #include <linux/log2.h>
60 #include <linux/memblock.h>
61 #include <linux/syscore_ops.h>
64 * DDR target is the same on all platforms.
69 * CPU Address Decode Windows registers
71 #define WIN_CTRL_OFF 0x0000
72 #define WIN_CTRL_ENABLE BIT(0)
73 /* Only on HW I/O coherency capable platforms */
74 #define WIN_CTRL_SYNCBARRIER BIT(1)
75 #define WIN_CTRL_TGT_MASK 0xf0
76 #define WIN_CTRL_TGT_SHIFT 4
77 #define WIN_CTRL_ATTR_MASK 0xff00
78 #define WIN_CTRL_ATTR_SHIFT 8
79 #define WIN_CTRL_SIZE_MASK 0xffff0000
80 #define WIN_CTRL_SIZE_SHIFT 16
81 #define WIN_BASE_OFF 0x0004
82 #define WIN_BASE_LOW 0xffff0000
83 #define WIN_BASE_HIGH 0xf
84 #define WIN_REMAP_LO_OFF 0x0008
85 #define WIN_REMAP_LOW 0xffff0000
86 #define WIN_REMAP_HI_OFF 0x000c
88 #define UNIT_SYNC_BARRIER_OFF 0x84
89 #define UNIT_SYNC_BARRIER_ALL 0xFFFF
91 #define ATTR_HW_COHERENCY (0x1 << 4)
93 #define DDR_BASE_CS_OFF(n) (0x0000 + ((n) << 3))
94 #define DDR_BASE_CS_HIGH_MASK 0xf
95 #define DDR_BASE_CS_LOW_MASK 0xff000000
96 #define DDR_SIZE_CS_OFF(n) (0x0004 + ((n) << 3))
97 #define DDR_SIZE_ENABLED BIT(0)
98 #define DDR_SIZE_CS_MASK 0x1c
99 #define DDR_SIZE_CS_SHIFT 2
100 #define DDR_SIZE_MASK 0xff000000
102 #define DOVE_DDR_BASE_CS_OFF(n) ((n) << 4)
104 /* Relative to mbusbridge_base */
105 #define MBUS_BRIDGE_CTRL_OFF 0x0
106 #define MBUS_BRIDGE_BASE_OFF 0x4
108 /* Maximum number of windows, for all known platforms */
109 #define MBUS_WINS_MAX 20
111 struct mvebu_mbus_state;
113 struct mvebu_mbus_soc_data {
114 unsigned int num_wins;
115 bool has_mbus_bridge;
116 unsigned int (*win_cfg_offset)(const int win);
117 unsigned int (*win_remap_offset)(const int win);
118 void (*setup_cpu_target)(struct mvebu_mbus_state *s);
119 int (*save_cpu_target)(struct mvebu_mbus_state *s,
120 u32 __iomem *store_addr);
121 int (*show_cpu_target)(struct mvebu_mbus_state *s,
122 struct seq_file *seq, void *v);
126 * Used to store the state of one MBus window accross suspend/resume.
128 struct mvebu_mbus_win_data {
135 struct mvebu_mbus_state {
136 void __iomem *mbuswins_base;
137 void __iomem *sdramwins_base;
138 void __iomem *mbusbridge_base;
139 phys_addr_t sdramwins_phys_base;
140 struct dentry *debugfs_root;
141 struct dentry *debugfs_sdram;
142 struct dentry *debugfs_devs;
143 struct resource pcie_mem_aperture;
144 struct resource pcie_io_aperture;
145 const struct mvebu_mbus_soc_data *soc;
148 /* Used during suspend/resume */
149 u32 mbus_bridge_ctrl;
150 u32 mbus_bridge_base;
151 struct mvebu_mbus_win_data wins[MBUS_WINS_MAX];
154 static struct mvebu_mbus_state mbus_state;
157 * We provide two variants of the mv_mbus_dram_info() function:
159 * - The normal one, where the described DRAM ranges may overlap with
160 * the I/O windows, but for which the DRAM ranges are guaranteed to
161 * have a power of two size. Such ranges are suitable for the DMA
162 * masters that only DMA between the RAM and the device, which is
163 * actually all devices except the crypto engines.
165 * - The 'nooverlap' one, where the described DRAM ranges are
166 * guaranteed to not overlap with the I/O windows, but for which the
167 * DRAM ranges will not have power of two sizes. They will only be
168 * aligned on a 64 KB boundary, and have a size multiple of 64
169 * KB. Such ranges are suitable for the DMA masters that DMA between
170 * the crypto SRAM (which is mapped through an I/O window) and a
171 * device. This is the case for the crypto engines.
174 static struct mbus_dram_target_info mvebu_mbus_dram_info;
175 static struct mbus_dram_target_info mvebu_mbus_dram_info_nooverlap;
177 const struct mbus_dram_target_info *mv_mbus_dram_info(void)
179 return &mvebu_mbus_dram_info;
181 EXPORT_SYMBOL_GPL(mv_mbus_dram_info);
183 const struct mbus_dram_target_info *mv_mbus_dram_info_nooverlap(void)
185 return &mvebu_mbus_dram_info_nooverlap;
187 EXPORT_SYMBOL_GPL(mv_mbus_dram_info_nooverlap);
189 /* Checks whether the given window has remap capability */
190 static bool mvebu_mbus_window_is_remappable(struct mvebu_mbus_state *mbus,
193 return mbus->soc->win_remap_offset(win) != MVEBU_MBUS_NO_REMAP;
197 * Functions to manipulate the address decoding windows
200 static void mvebu_mbus_read_window(struct mvebu_mbus_state *mbus,
201 int win, int *enabled, u64 *base,
202 u32 *size, u8 *target, u8 *attr,
205 void __iomem *addr = mbus->mbuswins_base +
206 mbus->soc->win_cfg_offset(win);
207 u32 basereg = readl(addr + WIN_BASE_OFF);
208 u32 ctrlreg = readl(addr + WIN_CTRL_OFF);
210 if (!(ctrlreg & WIN_CTRL_ENABLE)) {
216 *base = ((u64)basereg & WIN_BASE_HIGH) << 32;
217 *base |= (basereg & WIN_BASE_LOW);
218 *size = (ctrlreg | ~WIN_CTRL_SIZE_MASK) + 1;
221 *target = (ctrlreg & WIN_CTRL_TGT_MASK) >> WIN_CTRL_TGT_SHIFT;
224 *attr = (ctrlreg & WIN_CTRL_ATTR_MASK) >> WIN_CTRL_ATTR_SHIFT;
227 if (mvebu_mbus_window_is_remappable(mbus, win)) {
228 u32 remap_low, remap_hi;
229 void __iomem *addr_rmp = mbus->mbuswins_base +
230 mbus->soc->win_remap_offset(win);
231 remap_low = readl(addr_rmp + WIN_REMAP_LO_OFF);
232 remap_hi = readl(addr_rmp + WIN_REMAP_HI_OFF);
233 *remap = ((u64)remap_hi << 32) | remap_low;
239 static void mvebu_mbus_disable_window(struct mvebu_mbus_state *mbus,
244 addr = mbus->mbuswins_base + mbus->soc->win_cfg_offset(win);
245 writel(0, addr + WIN_BASE_OFF);
246 writel(0, addr + WIN_CTRL_OFF);
248 if (mvebu_mbus_window_is_remappable(mbus, win)) {
249 addr = mbus->mbuswins_base + mbus->soc->win_remap_offset(win);
250 writel(0, addr + WIN_REMAP_LO_OFF);
251 writel(0, addr + WIN_REMAP_HI_OFF);
255 /* Checks whether the given window number is available */
257 static int mvebu_mbus_window_is_free(struct mvebu_mbus_state *mbus,
260 void __iomem *addr = mbus->mbuswins_base +
261 mbus->soc->win_cfg_offset(win);
262 u32 ctrl = readl(addr + WIN_CTRL_OFF);
264 return !(ctrl & WIN_CTRL_ENABLE);
268 * Checks whether the given (base, base+size) area doesn't overlap an
271 static int mvebu_mbus_window_conflicts(struct mvebu_mbus_state *mbus,
272 phys_addr_t base, size_t size,
275 u64 end = (u64)base + size;
278 for (win = 0; win < mbus->soc->num_wins; win++) {
284 mvebu_mbus_read_window(mbus, win,
285 &enabled, &wbase, &wsize,
286 &wtarget, &wattr, NULL);
291 wend = wbase + wsize;
294 * Check if the current window overlaps with the
295 * proposed physical range
297 if ((u64)base < wend && end > wbase)
304 static int mvebu_mbus_find_window(struct mvebu_mbus_state *mbus,
305 phys_addr_t base, size_t size)
309 for (win = 0; win < mbus->soc->num_wins; win++) {
314 mvebu_mbus_read_window(mbus, win,
315 &enabled, &wbase, &wsize,
321 if (base == wbase && size == wsize)
328 static int mvebu_mbus_setup_window(struct mvebu_mbus_state *mbus,
329 int win, phys_addr_t base, size_t size,
330 phys_addr_t remap, u8 target,
333 void __iomem *addr = mbus->mbuswins_base +
334 mbus->soc->win_cfg_offset(win);
335 u32 ctrl, remap_addr;
337 if (!is_power_of_2(size)) {
338 WARN(true, "Invalid MBus window size: 0x%zx\n", size);
342 if ((base & (phys_addr_t)(size - 1)) != 0) {
343 WARN(true, "Invalid MBus base/size: %pa len 0x%zx\n", &base,
348 ctrl = ((size - 1) & WIN_CTRL_SIZE_MASK) |
349 (attr << WIN_CTRL_ATTR_SHIFT) |
350 (target << WIN_CTRL_TGT_SHIFT) |
352 if (mbus->hw_io_coherency)
353 ctrl |= WIN_CTRL_SYNCBARRIER;
355 writel(base & WIN_BASE_LOW, addr + WIN_BASE_OFF);
356 writel(ctrl, addr + WIN_CTRL_OFF);
358 if (mvebu_mbus_window_is_remappable(mbus, win)) {
359 void __iomem *addr_rmp = mbus->mbuswins_base +
360 mbus->soc->win_remap_offset(win);
362 if (remap == MVEBU_MBUS_NO_REMAP)
366 writel(remap_addr & WIN_REMAP_LOW, addr_rmp + WIN_REMAP_LO_OFF);
367 writel(0, addr_rmp + WIN_REMAP_HI_OFF);
373 static int mvebu_mbus_alloc_window(struct mvebu_mbus_state *mbus,
374 phys_addr_t base, size_t size,
375 phys_addr_t remap, u8 target,
380 if (remap == MVEBU_MBUS_NO_REMAP) {
381 for (win = 0; win < mbus->soc->num_wins; win++) {
382 if (mvebu_mbus_window_is_remappable(mbus, win))
385 if (mvebu_mbus_window_is_free(mbus, win))
386 return mvebu_mbus_setup_window(mbus, win, base,
392 for (win = 0; win < mbus->soc->num_wins; win++) {
393 /* Skip window if need remap but is not supported */
394 if ((remap != MVEBU_MBUS_NO_REMAP) &&
395 !mvebu_mbus_window_is_remappable(mbus, win))
398 if (mvebu_mbus_window_is_free(mbus, win))
399 return mvebu_mbus_setup_window(mbus, win, base, size,
400 remap, target, attr);
410 /* Common function used for Dove, Kirkwood, Armada 370/XP and Orion 5x */
411 static int mvebu_sdram_debug_show_orion(struct mvebu_mbus_state *mbus,
412 struct seq_file *seq, void *v)
416 for (i = 0; i < 4; i++) {
417 u32 basereg = readl(mbus->sdramwins_base + DDR_BASE_CS_OFF(i));
418 u32 sizereg = readl(mbus->sdramwins_base + DDR_SIZE_CS_OFF(i));
422 if (!(sizereg & DDR_SIZE_ENABLED)) {
423 seq_printf(seq, "[%d] disabled\n", i);
427 base = ((u64)basereg & DDR_BASE_CS_HIGH_MASK) << 32;
428 base |= basereg & DDR_BASE_CS_LOW_MASK;
429 size = (sizereg | ~DDR_SIZE_MASK);
431 seq_printf(seq, "[%d] %016llx - %016llx : cs%d\n",
432 i, (unsigned long long)base,
433 (unsigned long long)base + size + 1,
434 (sizereg & DDR_SIZE_CS_MASK) >> DDR_SIZE_CS_SHIFT);
440 /* Special function for Dove */
441 static int mvebu_sdram_debug_show_dove(struct mvebu_mbus_state *mbus,
442 struct seq_file *seq, void *v)
446 for (i = 0; i < 2; i++) {
447 u32 map = readl(mbus->sdramwins_base + DOVE_DDR_BASE_CS_OFF(i));
452 seq_printf(seq, "[%d] disabled\n", i);
456 base = map & 0xff800000;
457 size = 0x100000 << (((map & 0x000f0000) >> 16) - 4);
459 seq_printf(seq, "[%d] %016llx - %016llx : cs%d\n",
460 i, (unsigned long long)base,
461 (unsigned long long)base + size, i);
467 static int mvebu_sdram_debug_show(struct seq_file *seq, void *v)
469 struct mvebu_mbus_state *mbus = &mbus_state;
470 return mbus->soc->show_cpu_target(mbus, seq, v);
473 static int mvebu_sdram_debug_open(struct inode *inode, struct file *file)
475 return single_open(file, mvebu_sdram_debug_show, inode->i_private);
478 static const struct file_operations mvebu_sdram_debug_fops = {
479 .open = mvebu_sdram_debug_open,
482 .release = single_release,
485 static int mvebu_devs_debug_show(struct seq_file *seq, void *v)
487 struct mvebu_mbus_state *mbus = &mbus_state;
490 for (win = 0; win < mbus->soc->num_wins; win++) {
496 mvebu_mbus_read_window(mbus, win,
497 &enabled, &wbase, &wsize,
498 &wtarget, &wattr, &wremap);
501 seq_printf(seq, "[%02d] disabled\n", win);
505 seq_printf(seq, "[%02d] %016llx - %016llx : %04x:%04x",
506 win, (unsigned long long)wbase,
507 (unsigned long long)(wbase + wsize), wtarget, wattr);
509 if (!is_power_of_2(wsize) ||
510 ((wbase & (u64)(wsize - 1)) != 0))
511 seq_puts(seq, " (Invalid base/size!!)");
513 if (mvebu_mbus_window_is_remappable(mbus, win)) {
514 seq_printf(seq, " (remap %016llx)\n",
515 (unsigned long long)wremap);
517 seq_printf(seq, "\n");
523 static int mvebu_devs_debug_open(struct inode *inode, struct file *file)
525 return single_open(file, mvebu_devs_debug_show, inode->i_private);
528 static const struct file_operations mvebu_devs_debug_fops = {
529 .open = mvebu_devs_debug_open,
532 .release = single_release,
536 * SoC-specific functions and definitions
539 static unsigned int generic_mbus_win_cfg_offset(int win)
544 static unsigned int armada_370_xp_mbus_win_cfg_offset(int win)
546 /* The register layout is a bit annoying and the below code
547 * tries to cope with it.
548 * - At offset 0x0, there are the registers for the first 8
549 * windows, with 4 registers of 32 bits per window (ctrl,
550 * base, remap low, remap high)
551 * - Then at offset 0x80, there is a hole of 0x10 bytes for
552 * the internal registers base address and internal units
553 * sync barrier register.
554 * - Then at offset 0x90, there the registers for 12
555 * windows, with only 2 registers of 32 bits per window
561 return 0x90 + ((win - 8) << 3);
564 static unsigned int mv78xx0_mbus_win_cfg_offset(int win)
569 return 0x900 + ((win - 8) << 4);
572 static unsigned int generic_mbus_win_remap_2_offset(int win)
575 return generic_mbus_win_cfg_offset(win);
577 return MVEBU_MBUS_NO_REMAP;
580 static unsigned int generic_mbus_win_remap_4_offset(int win)
583 return generic_mbus_win_cfg_offset(win);
585 return MVEBU_MBUS_NO_REMAP;
588 static unsigned int generic_mbus_win_remap_8_offset(int win)
591 return generic_mbus_win_cfg_offset(win);
593 return MVEBU_MBUS_NO_REMAP;
596 static unsigned int armada_xp_mbus_win_remap_offset(int win)
599 return generic_mbus_win_cfg_offset(win);
601 return 0xF0 - WIN_REMAP_LO_OFF;
603 return MVEBU_MBUS_NO_REMAP;
607 * Use the memblock information to find the MBus bridge hole in the
608 * physical address space.
611 mvebu_mbus_find_bridge_hole(uint64_t *start, uint64_t *end)
613 phys_addr_t reg_start, reg_end;
616 for_each_mem_range(i, ®_start, ®_end) {
618 * This part of the memory is above 4 GB, so we don't
619 * care for the MBus bridge hole.
621 if ((u64)reg_start >= 0x100000000ULL)
625 * The MBus bridge hole is at the end of the RAM under
633 *end = 0x100000000ULL;
637 * This function fills in the mvebu_mbus_dram_info_nooverlap data
638 * structure, by looking at the mvebu_mbus_dram_info data, and
639 * removing the parts of it that overlap with I/O windows.
642 mvebu_mbus_setup_cpu_target_nooverlap(struct mvebu_mbus_state *mbus)
644 uint64_t mbus_bridge_base, mbus_bridge_end;
645 int cs_nooverlap = 0;
648 mvebu_mbus_find_bridge_hole(&mbus_bridge_base, &mbus_bridge_end);
650 for (i = 0; i < mvebu_mbus_dram_info.num_cs; i++) {
651 struct mbus_dram_window *w;
654 w = &mvebu_mbus_dram_info.cs[i];
660 * The CS is fully enclosed inside the MBus bridge
661 * area, so ignore it.
663 if (base >= mbus_bridge_base && end <= mbus_bridge_end)
667 * Beginning of CS overlaps with end of MBus, raise CS
668 * base address, and shrink its size.
670 if (base >= mbus_bridge_base && end > mbus_bridge_end) {
671 size -= mbus_bridge_end - base;
672 base = mbus_bridge_end;
676 * End of CS overlaps with beginning of MBus, shrink
679 if (base < mbus_bridge_base && end > mbus_bridge_base)
680 size -= end - mbus_bridge_base;
682 w = &mvebu_mbus_dram_info_nooverlap.cs[cs_nooverlap++];
684 w->mbus_attr = 0xf & ~(1 << i);
685 if (mbus->hw_io_coherency)
686 w->mbus_attr |= ATTR_HW_COHERENCY;
691 mvebu_mbus_dram_info_nooverlap.mbus_dram_target_id = TARGET_DDR;
692 mvebu_mbus_dram_info_nooverlap.num_cs = cs_nooverlap;
696 mvebu_mbus_default_setup_cpu_target(struct mvebu_mbus_state *mbus)
701 mvebu_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
703 for (i = 0, cs = 0; i < 4; i++) {
704 u32 base = readl(mbus->sdramwins_base + DDR_BASE_CS_OFF(i));
705 u32 size = readl(mbus->sdramwins_base + DDR_SIZE_CS_OFF(i));
708 * We only take care of entries for which the chip
709 * select is enabled, and that don't have high base
710 * address bits set (devices can only access the first
711 * 32 bits of the memory).
713 if ((size & DDR_SIZE_ENABLED) &&
714 !(base & DDR_BASE_CS_HIGH_MASK)) {
715 struct mbus_dram_window *w;
717 w = &mvebu_mbus_dram_info.cs[cs++];
719 w->mbus_attr = 0xf & ~(1 << i);
720 if (mbus->hw_io_coherency)
721 w->mbus_attr |= ATTR_HW_COHERENCY;
722 w->base = base & DDR_BASE_CS_LOW_MASK;
723 w->size = (u64)(size | ~DDR_SIZE_MASK) + 1;
726 mvebu_mbus_dram_info.num_cs = cs;
730 mvebu_mbus_default_save_cpu_target(struct mvebu_mbus_state *mbus,
731 u32 __iomem *store_addr)
735 for (i = 0; i < 4; i++) {
736 u32 base = readl(mbus->sdramwins_base + DDR_BASE_CS_OFF(i));
737 u32 size = readl(mbus->sdramwins_base + DDR_SIZE_CS_OFF(i));
739 writel(mbus->sdramwins_phys_base + DDR_BASE_CS_OFF(i),
741 writel(base, store_addr++);
742 writel(mbus->sdramwins_phys_base + DDR_SIZE_CS_OFF(i),
744 writel(size, store_addr++);
747 /* We've written 16 words to the store address */
752 mvebu_mbus_dove_setup_cpu_target(struct mvebu_mbus_state *mbus)
757 mvebu_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
759 for (i = 0, cs = 0; i < 2; i++) {
760 u32 map = readl(mbus->sdramwins_base + DOVE_DDR_BASE_CS_OFF(i));
763 * Chip select enabled?
766 struct mbus_dram_window *w;
768 w = &mvebu_mbus_dram_info.cs[cs++];
770 w->mbus_attr = 0; /* CS address decoding done inside */
771 /* the DDR controller, no need to */
772 /* provide attributes */
773 w->base = map & 0xff800000;
774 w->size = 0x100000 << (((map & 0x000f0000) >> 16) - 4);
778 mvebu_mbus_dram_info.num_cs = cs;
782 mvebu_mbus_dove_save_cpu_target(struct mvebu_mbus_state *mbus,
783 u32 __iomem *store_addr)
787 for (i = 0; i < 2; i++) {
788 u32 map = readl(mbus->sdramwins_base + DOVE_DDR_BASE_CS_OFF(i));
790 writel(mbus->sdramwins_phys_base + DOVE_DDR_BASE_CS_OFF(i),
792 writel(map, store_addr++);
795 /* We've written 4 words to the store address */
799 int mvebu_mbus_save_cpu_target(u32 __iomem *store_addr)
801 return mbus_state.soc->save_cpu_target(&mbus_state, store_addr);
804 static const struct mvebu_mbus_soc_data armada_370_mbus_data = {
806 .has_mbus_bridge = true,
807 .win_cfg_offset = armada_370_xp_mbus_win_cfg_offset,
808 .win_remap_offset = generic_mbus_win_remap_8_offset,
809 .setup_cpu_target = mvebu_mbus_default_setup_cpu_target,
810 .show_cpu_target = mvebu_sdram_debug_show_orion,
811 .save_cpu_target = mvebu_mbus_default_save_cpu_target,
814 static const struct mvebu_mbus_soc_data armada_xp_mbus_data = {
816 .has_mbus_bridge = true,
817 .win_cfg_offset = armada_370_xp_mbus_win_cfg_offset,
818 .win_remap_offset = armada_xp_mbus_win_remap_offset,
819 .setup_cpu_target = mvebu_mbus_default_setup_cpu_target,
820 .show_cpu_target = mvebu_sdram_debug_show_orion,
821 .save_cpu_target = mvebu_mbus_default_save_cpu_target,
824 static const struct mvebu_mbus_soc_data kirkwood_mbus_data = {
826 .win_cfg_offset = generic_mbus_win_cfg_offset,
827 .save_cpu_target = mvebu_mbus_default_save_cpu_target,
828 .win_remap_offset = generic_mbus_win_remap_4_offset,
829 .setup_cpu_target = mvebu_mbus_default_setup_cpu_target,
830 .show_cpu_target = mvebu_sdram_debug_show_orion,
833 static const struct mvebu_mbus_soc_data dove_mbus_data = {
835 .win_cfg_offset = generic_mbus_win_cfg_offset,
836 .save_cpu_target = mvebu_mbus_dove_save_cpu_target,
837 .win_remap_offset = generic_mbus_win_remap_4_offset,
838 .setup_cpu_target = mvebu_mbus_dove_setup_cpu_target,
839 .show_cpu_target = mvebu_sdram_debug_show_dove,
843 * Some variants of Orion5x have 4 remappable windows, some other have
846 static const struct mvebu_mbus_soc_data orion5x_4win_mbus_data = {
848 .win_cfg_offset = generic_mbus_win_cfg_offset,
849 .save_cpu_target = mvebu_mbus_default_save_cpu_target,
850 .win_remap_offset = generic_mbus_win_remap_4_offset,
851 .setup_cpu_target = mvebu_mbus_default_setup_cpu_target,
852 .show_cpu_target = mvebu_sdram_debug_show_orion,
855 static const struct mvebu_mbus_soc_data orion5x_2win_mbus_data = {
857 .win_cfg_offset = generic_mbus_win_cfg_offset,
858 .save_cpu_target = mvebu_mbus_default_save_cpu_target,
859 .win_remap_offset = generic_mbus_win_remap_2_offset,
860 .setup_cpu_target = mvebu_mbus_default_setup_cpu_target,
861 .show_cpu_target = mvebu_sdram_debug_show_orion,
864 static const struct mvebu_mbus_soc_data mv78xx0_mbus_data = {
866 .win_cfg_offset = mv78xx0_mbus_win_cfg_offset,
867 .save_cpu_target = mvebu_mbus_default_save_cpu_target,
868 .win_remap_offset = generic_mbus_win_remap_8_offset,
869 .setup_cpu_target = mvebu_mbus_default_setup_cpu_target,
870 .show_cpu_target = mvebu_sdram_debug_show_orion,
873 static const struct of_device_id of_mvebu_mbus_ids[] = {
874 { .compatible = "marvell,armada370-mbus",
875 .data = &armada_370_mbus_data, },
876 { .compatible = "marvell,armada375-mbus",
877 .data = &armada_xp_mbus_data, },
878 { .compatible = "marvell,armada380-mbus",
879 .data = &armada_xp_mbus_data, },
880 { .compatible = "marvell,armadaxp-mbus",
881 .data = &armada_xp_mbus_data, },
882 { .compatible = "marvell,kirkwood-mbus",
883 .data = &kirkwood_mbus_data, },
884 { .compatible = "marvell,dove-mbus",
885 .data = &dove_mbus_data, },
886 { .compatible = "marvell,orion5x-88f5281-mbus",
887 .data = &orion5x_4win_mbus_data, },
888 { .compatible = "marvell,orion5x-88f5182-mbus",
889 .data = &orion5x_2win_mbus_data, },
890 { .compatible = "marvell,orion5x-88f5181-mbus",
891 .data = &orion5x_2win_mbus_data, },
892 { .compatible = "marvell,orion5x-88f6183-mbus",
893 .data = &orion5x_4win_mbus_data, },
894 { .compatible = "marvell,mv78xx0-mbus",
895 .data = &mv78xx0_mbus_data, },
900 * Public API of the driver
902 int mvebu_mbus_add_window_remap_by_id(unsigned int target,
903 unsigned int attribute,
904 phys_addr_t base, size_t size,
907 struct mvebu_mbus_state *s = &mbus_state;
909 if (!mvebu_mbus_window_conflicts(s, base, size, target, attribute)) {
910 pr_err("cannot add window '%x:%x', conflicts with another window\n",
915 return mvebu_mbus_alloc_window(s, base, size, remap, target, attribute);
918 int mvebu_mbus_add_window_by_id(unsigned int target, unsigned int attribute,
919 phys_addr_t base, size_t size)
921 return mvebu_mbus_add_window_remap_by_id(target, attribute, base,
922 size, MVEBU_MBUS_NO_REMAP);
925 int mvebu_mbus_del_window(phys_addr_t base, size_t size)
929 win = mvebu_mbus_find_window(&mbus_state, base, size);
933 mvebu_mbus_disable_window(&mbus_state, win);
937 void mvebu_mbus_get_pcie_mem_aperture(struct resource *res)
941 *res = mbus_state.pcie_mem_aperture;
944 void mvebu_mbus_get_pcie_io_aperture(struct resource *res)
948 *res = mbus_state.pcie_io_aperture;
951 int mvebu_mbus_get_dram_win_info(phys_addr_t phyaddr, u8 *target, u8 *attr)
953 const struct mbus_dram_target_info *dram;
957 dram = mv_mbus_dram_info();
959 pr_err("missing DRAM information\n");
963 /* Try to find matching DRAM window for phyaddr */
964 for (i = 0; i < dram->num_cs; i++) {
965 const struct mbus_dram_window *cs = dram->cs + i;
967 if (cs->base <= phyaddr &&
968 phyaddr <= (cs->base + cs->size - 1)) {
969 *target = dram->mbus_dram_target_id;
970 *attr = cs->mbus_attr;
975 pr_err("invalid dram address %pa\n", &phyaddr);
978 EXPORT_SYMBOL_GPL(mvebu_mbus_get_dram_win_info);
980 int mvebu_mbus_get_io_win_info(phys_addr_t phyaddr, u32 *size, u8 *target,
985 for (win = 0; win < mbus_state.soc->num_wins; win++) {
989 mvebu_mbus_read_window(&mbus_state, win, &enabled, &wbase,
990 size, target, attr, NULL);
995 if (wbase <= phyaddr && phyaddr <= wbase + *size)
1001 EXPORT_SYMBOL_GPL(mvebu_mbus_get_io_win_info);
1003 static __init int mvebu_mbus_debugfs_init(void)
1005 struct mvebu_mbus_state *s = &mbus_state;
1008 * If no base has been initialized, doesn't make sense to
1009 * register the debugfs entries. We may be on a multiplatform
1010 * kernel that isn't running a Marvell EBU SoC.
1012 if (!s->mbuswins_base)
1015 s->debugfs_root = debugfs_create_dir("mvebu-mbus", NULL);
1016 if (s->debugfs_root) {
1017 s->debugfs_sdram = debugfs_create_file("sdram", S_IRUGO,
1018 s->debugfs_root, NULL,
1019 &mvebu_sdram_debug_fops);
1020 s->debugfs_devs = debugfs_create_file("devices", S_IRUGO,
1021 s->debugfs_root, NULL,
1022 &mvebu_devs_debug_fops);
1027 fs_initcall(mvebu_mbus_debugfs_init);
1029 static int mvebu_mbus_suspend(void)
1031 struct mvebu_mbus_state *s = &mbus_state;
1034 if (!s->mbusbridge_base)
1037 for (win = 0; win < s->soc->num_wins; win++) {
1038 void __iomem *addr = s->mbuswins_base +
1039 s->soc->win_cfg_offset(win);
1040 void __iomem *addr_rmp;
1042 s->wins[win].base = readl(addr + WIN_BASE_OFF);
1043 s->wins[win].ctrl = readl(addr + WIN_CTRL_OFF);
1045 if (!mvebu_mbus_window_is_remappable(s, win))
1048 addr_rmp = s->mbuswins_base +
1049 s->soc->win_remap_offset(win);
1051 s->wins[win].remap_lo = readl(addr_rmp + WIN_REMAP_LO_OFF);
1052 s->wins[win].remap_hi = readl(addr_rmp + WIN_REMAP_HI_OFF);
1055 s->mbus_bridge_ctrl = readl(s->mbusbridge_base +
1056 MBUS_BRIDGE_CTRL_OFF);
1057 s->mbus_bridge_base = readl(s->mbusbridge_base +
1058 MBUS_BRIDGE_BASE_OFF);
1063 static void mvebu_mbus_resume(void)
1065 struct mvebu_mbus_state *s = &mbus_state;
1068 writel(s->mbus_bridge_ctrl,
1069 s->mbusbridge_base + MBUS_BRIDGE_CTRL_OFF);
1070 writel(s->mbus_bridge_base,
1071 s->mbusbridge_base + MBUS_BRIDGE_BASE_OFF);
1073 for (win = 0; win < s->soc->num_wins; win++) {
1074 void __iomem *addr = s->mbuswins_base +
1075 s->soc->win_cfg_offset(win);
1076 void __iomem *addr_rmp;
1078 writel(s->wins[win].base, addr + WIN_BASE_OFF);
1079 writel(s->wins[win].ctrl, addr + WIN_CTRL_OFF);
1081 if (!mvebu_mbus_window_is_remappable(s, win))
1084 addr_rmp = s->mbuswins_base +
1085 s->soc->win_remap_offset(win);
1087 writel(s->wins[win].remap_lo, addr_rmp + WIN_REMAP_LO_OFF);
1088 writel(s->wins[win].remap_hi, addr_rmp + WIN_REMAP_HI_OFF);
1092 static struct syscore_ops mvebu_mbus_syscore_ops = {
1093 .suspend = mvebu_mbus_suspend,
1094 .resume = mvebu_mbus_resume,
1097 static int __init mvebu_mbus_common_init(struct mvebu_mbus_state *mbus,
1098 phys_addr_t mbuswins_phys_base,
1099 size_t mbuswins_size,
1100 phys_addr_t sdramwins_phys_base,
1101 size_t sdramwins_size,
1102 phys_addr_t mbusbridge_phys_base,
1103 size_t mbusbridge_size,
1108 mbus->mbuswins_base = ioremap(mbuswins_phys_base, mbuswins_size);
1109 if (!mbus->mbuswins_base)
1112 mbus->sdramwins_base = ioremap(sdramwins_phys_base, sdramwins_size);
1113 if (!mbus->sdramwins_base) {
1114 iounmap(mbus->mbuswins_base);
1118 mbus->sdramwins_phys_base = sdramwins_phys_base;
1120 if (mbusbridge_phys_base) {
1121 mbus->mbusbridge_base = ioremap(mbusbridge_phys_base,
1123 if (!mbus->mbusbridge_base) {
1124 iounmap(mbus->sdramwins_base);
1125 iounmap(mbus->mbuswins_base);
1129 mbus->mbusbridge_base = NULL;
1131 for (win = 0; win < mbus->soc->num_wins; win++)
1132 mvebu_mbus_disable_window(mbus, win);
1134 mbus->soc->setup_cpu_target(mbus);
1135 mvebu_mbus_setup_cpu_target_nooverlap(mbus);
1138 writel(UNIT_SYNC_BARRIER_ALL,
1139 mbus->mbuswins_base + UNIT_SYNC_BARRIER_OFF);
1141 register_syscore_ops(&mvebu_mbus_syscore_ops);
1146 int __init mvebu_mbus_init(const char *soc, phys_addr_t mbuswins_phys_base,
1147 size_t mbuswins_size,
1148 phys_addr_t sdramwins_phys_base,
1149 size_t sdramwins_size)
1151 const struct of_device_id *of_id;
1153 for (of_id = of_mvebu_mbus_ids; of_id->compatible[0]; of_id++)
1154 if (!strcmp(of_id->compatible, soc))
1157 if (!of_id->compatible[0]) {
1158 pr_err("could not find a matching SoC family\n");
1162 mbus_state.soc = of_id->data;
1164 return mvebu_mbus_common_init(&mbus_state,
1167 sdramwins_phys_base,
1168 sdramwins_size, 0, 0, false);
1173 * The window IDs in the ranges DT property have the following format:
1174 * - bits 28 to 31: MBus custom field
1175 * - bits 24 to 27: window target ID
1176 * - bits 16 to 23: window attribute ID
1177 * - bits 0 to 15: unused
1179 #define CUSTOM(id) (((id) & 0xF0000000) >> 24)
1180 #define TARGET(id) (((id) & 0x0F000000) >> 24)
1181 #define ATTR(id) (((id) & 0x00FF0000) >> 16)
1183 static int __init mbus_dt_setup_win(struct mvebu_mbus_state *mbus,
1187 if (!mvebu_mbus_window_conflicts(mbus, base, size, target, attr)) {
1188 pr_err("cannot add window '%04x:%04x', conflicts with another window\n",
1193 if (mvebu_mbus_alloc_window(mbus, base, size, MVEBU_MBUS_NO_REMAP,
1195 pr_err("cannot add window '%04x:%04x', too many windows\n",
1203 mbus_parse_ranges(struct device_node *node,
1204 int *addr_cells, int *c_addr_cells, int *c_size_cells,
1205 int *cell_count, const __be32 **ranges_start,
1206 const __be32 **ranges_end)
1209 int ranges_len, tuple_len;
1211 /* Allow a node with no 'ranges' property */
1212 *ranges_start = of_get_property(node, "ranges", &ranges_len);
1213 if (*ranges_start == NULL) {
1214 *addr_cells = *c_addr_cells = *c_size_cells = *cell_count = 0;
1215 *ranges_start = *ranges_end = NULL;
1218 *ranges_end = *ranges_start + ranges_len / sizeof(__be32);
1220 *addr_cells = of_n_addr_cells(node);
1222 prop = of_get_property(node, "#address-cells", NULL);
1223 *c_addr_cells = be32_to_cpup(prop);
1225 prop = of_get_property(node, "#size-cells", NULL);
1226 *c_size_cells = be32_to_cpup(prop);
1228 *cell_count = *addr_cells + *c_addr_cells + *c_size_cells;
1229 tuple_len = (*cell_count) * sizeof(__be32);
1231 if (ranges_len % tuple_len) {
1232 pr_warn("malformed ranges entry '%pOFn'\n", node);
1238 static int __init mbus_dt_setup(struct mvebu_mbus_state *mbus,
1239 struct device_node *np)
1241 int addr_cells, c_addr_cells, c_size_cells;
1242 int i, ret, cell_count;
1243 const __be32 *r, *ranges_start, *ranges_end;
1245 ret = mbus_parse_ranges(np, &addr_cells, &c_addr_cells,
1246 &c_size_cells, &cell_count,
1247 &ranges_start, &ranges_end);
1251 for (i = 0, r = ranges_start; r < ranges_end; r += cell_count, i++) {
1252 u32 windowid, base, size;
1256 * An entry with a non-zero custom field do not
1257 * correspond to a static window, so skip it.
1259 windowid = of_read_number(r, 1);
1260 if (CUSTOM(windowid))
1263 target = TARGET(windowid);
1264 attr = ATTR(windowid);
1266 base = of_read_number(r + c_addr_cells, addr_cells);
1267 size = of_read_number(r + c_addr_cells + addr_cells,
1269 ret = mbus_dt_setup_win(mbus, base, size, target, attr);
1276 static void __init mvebu_mbus_get_pcie_resources(struct device_node *np,
1277 struct resource *mem,
1278 struct resource *io)
1284 * These are optional, so we make sure that resource_size(x) will
1287 memset(mem, 0, sizeof(struct resource));
1289 memset(io, 0, sizeof(struct resource));
1292 ret = of_property_read_u32_array(np, "pcie-mem-aperture", reg, ARRAY_SIZE(reg));
1294 mem->start = reg[0];
1295 mem->end = mem->start + reg[1] - 1;
1296 mem->flags = IORESOURCE_MEM;
1299 ret = of_property_read_u32_array(np, "pcie-io-aperture", reg, ARRAY_SIZE(reg));
1302 io->end = io->start + reg[1] - 1;
1303 io->flags = IORESOURCE_IO;
1307 int __init mvebu_mbus_dt_init(bool is_coherent)
1309 struct resource mbuswins_res, sdramwins_res, mbusbridge_res;
1310 struct device_node *np, *controller;
1311 const struct of_device_id *of_id;
1315 np = of_find_matching_node_and_match(NULL, of_mvebu_mbus_ids, &of_id);
1317 pr_err("could not find a matching SoC family\n");
1321 mbus_state.soc = of_id->data;
1323 prop = of_get_property(np, "controller", NULL);
1325 pr_err("required 'controller' property missing\n");
1329 controller = of_find_node_by_phandle(be32_to_cpup(prop));
1331 pr_err("could not find an 'mbus-controller' node\n");
1335 if (of_address_to_resource(controller, 0, &mbuswins_res)) {
1336 pr_err("cannot get MBUS register address\n");
1340 if (of_address_to_resource(controller, 1, &sdramwins_res)) {
1341 pr_err("cannot get SDRAM register address\n");
1346 * Set the resource to 0 so that it can be left unmapped by
1347 * mvebu_mbus_common_init() if the DT doesn't carry the
1348 * necessary information. This is needed to preserve backward
1351 memset(&mbusbridge_res, 0, sizeof(mbusbridge_res));
1353 if (mbus_state.soc->has_mbus_bridge) {
1354 if (of_address_to_resource(controller, 2, &mbusbridge_res))
1355 pr_warn(FW_WARN "deprecated mbus-mvebu Device Tree, suspend/resume will not work\n");
1358 mbus_state.hw_io_coherency = is_coherent;
1360 /* Get optional pcie-{mem,io}-aperture properties */
1361 mvebu_mbus_get_pcie_resources(np, &mbus_state.pcie_mem_aperture,
1362 &mbus_state.pcie_io_aperture);
1364 ret = mvebu_mbus_common_init(&mbus_state,
1366 resource_size(&mbuswins_res),
1367 sdramwins_res.start,
1368 resource_size(&sdramwins_res),
1369 mbusbridge_res.start,
1370 resource_size(&mbusbridge_res),
1375 /* Setup statically declared windows in the DT */
1376 return mbus_dt_setup(&mbus_state, np);