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diff --git a/arch/arm/mach-orion/addr-map.c b/arch/arm/mach-orion/addr-map.c
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+/*
+ * arch/arm/mach-orion/addr-map.c
+ *
+ * Address map functions for Marvell Orion System On Chip
+ *
+ * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/hardware.h>
+#include "common.h"
+
+/*
+ * The Orion has fully programable address map. There's a separate address
+ * map for each of the device _master_ interfaces, e.g. CPU, PCI, PCIE, USB,
+ * Gigabit Ethernet, DMA/XOR engines, etc. Each interface has its own
+ * address decode windows that allow it to access any of the Orion resources.
+ *
+ * CPU address decoding --
+ * Linux assumes that it is the boot loader that already setup the access to
+ * DDR and internal registers.
+ * Setup access to PCI and PCI-E IO/MEM space is issued by core.c.
+ * Setup access to various devices located on the device bus interface (e.g.
+ * flashes, RTC, etc) should be issued by machine-setup.c according to
+ * specific board population (by using orion_setup_cpu_win()).
+ *
+ * Non-CPU Masters address decoding --
+ * Unlike the CPU, we setup the access from Orion's master interfaces to DDR
+ * banks only (the typical use case).
+ * Setup access for each master to DDR is issued by common.c.
+ *
+ * Note: although orion_setbits() and orion_clrbits() are not atomic
+ * no locking is necessary here since code in this file is only called
+ * at boot time when there is no concurrency issues.
+ */
+
+/*
+ * Generic Address Decode Windows bit settings
+ */
+#define TARGET_DDR 0
+#define TARGET_PCI 3
+#define TARGET_PCIE 4
+#define TARGET_DEV_BUS 1
+#define ATTR_DDR_CS(n) (((n) ==0) ? 0xe : \
+ ((n) == 1) ? 0xd : \
+ ((n) == 2) ? 0xb : \
+ ((n) == 3) ? 0x7 : 0xf)
+#define ATTR_PCIE_MEM 0x59
+#define ATTR_PCIE_IO 0x51
+#define ATTR_PCI_MEM 0x59
+#define ATTR_PCI_IO 0x51
+#define ATTR_DEV_CS0 0x1e
+#define ATTR_DEV_CS1 0x1d
+#define ATTR_DEV_CS2 0x1b
+#define ATTR_DEV_BOOT 0xf
+#define WIN_EN 1
+
+/*
+ * Helpers to get DDR banks info
+ */
+#define DDR_BASE_CS(n) ORION_DDR_REG(0x1500 + ((n) * 8))
+#define DDR_SIZE_CS(n) ORION_DDR_REG(0x1504 + ((n) * 8))
+#define DDR_MAX_CS 4
+#define DDR_REG_TO_SIZE(reg) (((reg) | 0xffffff) + 1)
+#define DDR_REG_TO_BASE(reg) ((reg) & 0xff000000)
+#define DDR_BANK_EN 1
+
+/*
+ * CPU Address Decode Windows registers
+ */
+#define CPU_WIN_CTRL(n) ORION_BRIDGE_REG(0x000 | ((n) << 4))
+#define CPU_WIN_BASE(n) ORION_BRIDGE_REG(0x004 | ((n) << 4))
+#define CPU_WIN_REMAP_LO(n) ORION_BRIDGE_REG(0x008 | ((n) << 4))
+#define CPU_WIN_REMAP_HI(n) ORION_BRIDGE_REG(0x00c | ((n) << 4))
+#define CPU_MAX_WIN 8
+
+/*
+ * Use this CPU address decode windows allocation
+ */
+#define CPU_WIN_PCIE_IO 0
+#define CPU_WIN_PCI_IO 1
+#define CPU_WIN_PCIE_MEM 2
+#define CPU_WIN_PCI_MEM 3
+#define CPU_WIN_DEV_BOOT 4
+#define CPU_WIN_DEV_CS0 5
+#define CPU_WIN_DEV_CS1 6
+#define CPU_WIN_DEV_CS2 7
+
+/*
+ * PCIE Address Decode Windows registers
+ */
+#define PCIE_BAR_CTRL(n) ORION_PCIE_REG(0x1804 + ((n - 1) * 4))
+#define PCIE_BAR_LO(n) ORION_PCIE_REG(0x0010 + ((n) * 8))
+#define PCIE_BAR_HI(n) ORION_PCIE_REG(0x0014 + ((n) * 8))
+#define PCIE_WIN_CTRL(n) ORION_PCIE_REG(0x1820 + ((n) << 4))
+#define PCIE_WIN_BASE(n) ORION_PCIE_REG(0x1824 + ((n) << 4))
+#define PCIE_WIN_REMAP(n) ORION_PCIE_REG(0x182c + ((n) << 4))
+#define PCIE_DEFWIN_CTRL ORION_PCIE_REG(0x18b0)
+#define PCIE_EXPROM_WIN_CTRL ORION_PCIE_REG(0x18c0)
+#define PCIE_EXPROM_WIN_REMP ORION_PCIE_REG(0x18c4)
+#define PCIE_MAX_BARS 3
+#define PCIE_MAX_WINS 5
+
+/*
+ * Use PCIE BAR '1' for all DDR banks
+ */
+#define PCIE_DRAM_BAR 1
+
+/*
+ * PCI Address Decode Windows registers
+ */
+#define PCI_BAR_SIZE_DDR_CS(n) (((n) == 0) ? ORION_PCI_REG(0xc08) : \
+ ((n) == 1) ? ORION_PCI_REG(0xd08) : \
+ ((n) == 2) ? ORION_PCI_REG(0xc0c) : \
+ ((n) == 3) ? ORION_PCI_REG(0xd0c) : 0)
+#define PCI_BAR_REMAP_DDR_CS(n) (((n) ==0) ? ORION_PCI_REG(0xc48) : \
+ ((n) == 1) ? ORION_PCI_REG(0xd48) : \
+ ((n) == 2) ? ORION_PCI_REG(0xc4c) : \
+ ((n) == 3) ? ORION_PCI_REG(0xd4c) : 0)
+#define PCI_BAR_ENABLE ORION_PCI_REG(0xc3c)
+#define PCI_CTRL_BASE_LO(n) ORION_PCI_REG(0x1e00 | ((n) << 4))
+#define PCI_CTRL_BASE_HI(n) ORION_PCI_REG(0x1e04 | ((n) << 4))
+#define PCI_CTRL_SIZE(n) ORION_PCI_REG(0x1e08 | ((n) << 4))
+#define PCI_ADDR_DECODE_CTRL ORION_PCI_REG(0xd3c)
+
+/*
+ * PCI configuration heleprs for BAR settings
+ */
+#define PCI_CONF_FUNC_BAR_CS(n) ((n) >> 1)
+#define PCI_CONF_REG_BAR_LO_CS(n) (((n) & 1) ? 0x18 : 0x10)
+#define PCI_CONF_REG_BAR_HI_CS(n) (((n) & 1) ? 0x1c : 0x14)
+
+/*
+ * Gigabit Ethernet Address Decode Windows registers
+ */
+#define ETH_WIN_BASE(win) ORION_ETH_REG(0x200 + ((win) * 8))
+#define ETH_WIN_SIZE(win) ORION_ETH_REG(0x204 + ((win) * 8))
+#define ETH_WIN_REMAP(win) ORION_ETH_REG(0x280 + ((win) * 4))
+#define ETH_WIN_EN ORION_ETH_REG(0x290)
+#define ETH_WIN_PROT ORION_ETH_REG(0x294)
+#define ETH_MAX_WIN 6
+#define ETH_MAX_REMAP_WIN 4
+
+/*
+ * USB Address Decode Windows registers
+ */
+#define USB_WIN_CTRL(i, w) ((i == 0) ? ORION_USB0_REG(0x320 + ((w) << 4)) \
+ : ORION_USB1_REG(0x320 + ((w) << 4)))
+#define USB_WIN_BASE(i, w) ((i == 0) ? ORION_USB0_REG(0x324 + ((w) << 4)) \
+ : ORION_USB1_REG(0x324 + ((w) << 4)))
+#define USB_MAX_WIN 4
+
+/*
+ * SATA Address Decode Windows registers
+ */
+#define SATA_WIN_CTRL(win) ORION_SATA_REG(0x30 + ((win) * 0x10))
+#define SATA_WIN_BASE(win) ORION_SATA_REG(0x34 + ((win) * 0x10))
+#define SATA_MAX_WIN 4
+
+static int __init orion_cpu_win_can_remap(u32 win)
+{
+ u32 dev, rev;
+
+ orion_pcie_id(&dev, &rev);
+ if ((dev == MV88F5281_DEV_ID && win < 4)
+ || (dev == MV88F5182_DEV_ID && win < 2)
+ || (dev == MV88F5181_DEV_ID && win < 2))
+ return 1;
+
+ return 0;
+}
+
+void __init orion_setup_cpu_win(enum orion_target target, u32 base, u32 size, int remap)
+{
+ u32 win, attr, ctrl;
+
+ switch (target) {
+ case ORION_PCIE_IO:
+ target = TARGET_PCIE;
+ attr = ATTR_PCIE_IO;
+ win = CPU_WIN_PCIE_IO;
+ break;
+ case ORION_PCI_IO:
+ target = TARGET_PCI;
+ attr = ATTR_PCI_IO;
+ win = CPU_WIN_PCI_IO;
+ break;
+ case ORION_PCIE_MEM:
+ target = TARGET_PCIE;
+ attr = ATTR_PCIE_MEM;
+ win = CPU_WIN_PCIE_MEM;
+ break;
+ case ORION_PCI_MEM:
+ target = TARGET_PCI;
+ attr = ATTR_PCI_MEM;
+ win = CPU_WIN_PCI_MEM;
+ break;
+ case ORION_DEV_BOOT:
+ target = TARGET_DEV_BUS;
+ attr = ATTR_DEV_BOOT;
+ win = CPU_WIN_DEV_BOOT;
+ break;
+ case ORION_DEV0:
+ target = TARGET_DEV_BUS;
+ attr = ATTR_DEV_CS0;
+ win = CPU_WIN_DEV_CS0;
+ break;
+ case ORION_DEV1:
+ target = TARGET_DEV_BUS;
+ attr = ATTR_DEV_CS1;
+ win = CPU_WIN_DEV_CS1;
+ break;
+ case ORION_DEV2:
+ target = TARGET_DEV_BUS;
+ attr = ATTR_DEV_CS2;
+ win = CPU_WIN_DEV_CS2;
+ break;
+ case ORION_DDR:
+ case ORION_REGS:
+ /*
+ * Must be mapped by bootloader.
+ */
+ default:
+ target = attr = win = -1;
+ BUG();
+ }
+
+ base &= 0xffff0000;
+ ctrl = (((size - 1) & 0xffff0000) | (attr << 8) |
+ (target << 4) | WIN_EN);
+
+ orion_write(CPU_WIN_BASE(win), base);
+ orion_write(CPU_WIN_CTRL(win), ctrl);
+
+ if (orion_cpu_win_can_remap(win)) {
+ if (remap >= 0) {
+ orion_write(CPU_WIN_REMAP_LO(win), remap & 0xffff0000);
+ orion_write(CPU_WIN_REMAP_HI(win), 0);
+ } else {
+ orion_write(CPU_WIN_REMAP_LO(win), base);
+ orion_write(CPU_WIN_REMAP_HI(win), 0);
+ }
+ }
+}
+
+void __init orion_setup_cpu_wins(void)
+{
+ int i;
+
+ /*
+ * First, disable and clear windows
+ */
+ for (i = 0; i < CPU_MAX_WIN; i++) {
+ orion_write(CPU_WIN_BASE(i), 0);
+ orion_write(CPU_WIN_CTRL(i), 0);
+ if (orion_cpu_win_can_remap(i)) {
+ orion_write(CPU_WIN_REMAP_LO(i), 0);
+ orion_write(CPU_WIN_REMAP_HI(i), 0);
+ }
+ }
+
+ /*
+ * Setup windows for PCI+PCIE IO+MAM space
+ */
+ orion_setup_cpu_win(ORION_PCIE_IO, ORION_PCIE_IO_BASE,
+ ORION_PCIE_IO_SIZE, ORION_PCIE_IO_REMAP);
+ orion_setup_cpu_win(ORION_PCI_IO, ORION_PCI_IO_BASE,
+ ORION_PCI_IO_SIZE, ORION_PCI_IO_REMAP);
+ orion_setup_cpu_win(ORION_PCIE_MEM, ORION_PCIE_MEM_BASE,
+ ORION_PCIE_MEM_SIZE, -1);
+ orion_setup_cpu_win(ORION_PCI_MEM, ORION_PCI_MEM_BASE,
+ ORION_PCI_MEM_SIZE, -1);
+}
+
+/*
+ * Setup PCIE BARs and Address Decode Wins:
+ * BAR[0,2] -> disabled, BAR[1] -> covers all DRAM banks
+ * WIN[0-3] -> DRAM bank[0-3]
+ */
+void __init orion_setup_pcie_wins(void)
+{
+ u32 base, size, i;
+
+ /*
+ * First, disable and clear BARs and windows
+ */
+ for (i = 1; i < PCIE_MAX_BARS; i++) {
+ orion_write(PCIE_BAR_CTRL(i), 0);
+ orion_write(PCIE_BAR_LO(i), 0);
+ orion_write(PCIE_BAR_HI(i), 0);
+ }
+
+ for (i = 0; i < PCIE_MAX_WINS; i++) {
+ orion_write(PCIE_WIN_CTRL(i), 0);
+ orion_write(PCIE_WIN_BASE(i), 0);
+ orion_write(PCIE_WIN_REMAP(i), 0);
+ }
+
+ /*
+ * Setup windows for DDR banks. Count total DDR size on the fly.
+ */
+ base = DDR_REG_TO_BASE(orion_read(DDR_BASE_CS(0)));
+ size = 0;
+ for (i = 0; i < DDR_MAX_CS; i++) {
+ u32 bank_base, bank_size;
+ bank_size = orion_read(DDR_SIZE_CS(i));
+ bank_base = orion_read(DDR_BASE_CS(i));
+ if (bank_size & DDR_BANK_EN) {
+ bank_size = DDR_REG_TO_SIZE(bank_size);
+ bank_base = DDR_REG_TO_BASE(bank_base);
+ orion_write(PCIE_WIN_BASE(i), bank_base & 0xffff0000);
+ orion_write(PCIE_WIN_REMAP(i), 0);
+ orion_write(PCIE_WIN_CTRL(i),
+ ((bank_size-1) & 0xffff0000) |
+ (ATTR_DDR_CS(i) << 8) |
+ (TARGET_DDR << 4) |
+ (PCIE_DRAM_BAR << 1) | WIN_EN);
+ size += bank_size;
+ }
+ }
+
+ /*
+ * Setup BAR[1] to all DRAM banks
+ */
+ orion_write(PCIE_BAR_LO(PCIE_DRAM_BAR), base & 0xffff0000);
+ orion_write(PCIE_BAR_HI(PCIE_DRAM_BAR), 0);
+ orion_write(PCIE_BAR_CTRL(PCIE_DRAM_BAR),
+ ((size - 1) & 0xffff0000) | WIN_EN);
+}
+
+void __init orion_setup_pci_wins(void)
+{
+ u32 base, size, i;
+
+ /*
+ * First, disable windows
+ */
+ orion_write(PCI_BAR_ENABLE, 0xffffffff);
+
+ /*
+ * Setup windows for DDR banks.
+ */
+ for (i = 0; i < DDR_MAX_CS; i++) {
+ base = orion_read(DDR_BASE_CS(i));
+ size = orion_read(DDR_SIZE_CS(i));
+ if (size & DDR_BANK_EN) {
+ u32 bus, dev, func, reg, val;
+ size = DDR_REG_TO_SIZE(size);
+ base = DDR_REG_TO_BASE(base);
+ bus = orion_pci_local_bus_nr();
+ dev = orion_pci_local_dev_nr();
+ func = PCI_CONF_FUNC_BAR_CS(i);
+ reg = PCI_CONF_REG_BAR_LO_CS(i);
+ orion_pci_hw_rd_conf(bus, dev, func, reg, 4, &val);
+ orion_pci_hw_wr_conf(bus, dev, func, reg, 4,
+ (base & 0xfffff000) | (val & 0xfff));
+ reg = PCI_CONF_REG_BAR_HI_CS(i);
+ orion_pci_hw_wr_conf(bus, dev, func, reg, 4, 0);
+ orion_write(PCI_BAR_SIZE_DDR_CS(i),
+ (size - 1) & 0xfffff000);
+ orion_write(PCI_BAR_REMAP_DDR_CS(i),
+ base & 0xfffff000);
+ orion_clrbits(PCI_BAR_ENABLE, (1 << i));
+ }
+ }
+
+ /*
+ * Disable automatic update of address remaping when writing to BARs
+ */
+ orion_setbits(PCI_ADDR_DECODE_CTRL, 1);
+}
+
+void __init orion_setup_usb_wins(void)
+{
+ int i;
+ u32 usb_if, dev, rev;
+ u32 max_usb_if = 1;
+
+ orion_pcie_id(&dev, &rev);
+ if (dev == MV88F5182_DEV_ID)
+ max_usb_if = 2;
+
+ for (usb_if = 0; usb_if < max_usb_if; usb_if++) {
+ /*
+ * First, disable and clear windows
+ */
+ for (i = 0; i < USB_MAX_WIN; i++) {
+ orion_write(USB_WIN_BASE(usb_if, i), 0);
+ orion_write(USB_WIN_CTRL(usb_if, i), 0);
+ }
+
+ /*
+ * Setup windows for DDR banks.
+ */
+ for (i = 0; i < DDR_MAX_CS; i++) {
+ u32 base, size;
+ size = orion_read(DDR_SIZE_CS(i));
+ base = orion_read(DDR_BASE_CS(i));
+ if (size & DDR_BANK_EN) {
+ base = DDR_REG_TO_BASE(base);
+ size = DDR_REG_TO_SIZE(size);
+ orion_write(USB_WIN_CTRL(usb_if, i),
+ ((size-1) & 0xffff0000) |
+ (ATTR_DDR_CS(i) << 8) |
+ (TARGET_DDR << 4) | WIN_EN);
+ orion_write(USB_WIN_BASE(usb_if, i),
+ base & 0xffff0000);
+ }
+ }
+ }
+}
+
+void __init orion_setup_eth_wins(void)
+{
+ int i;
+
+ /*
+ * First, disable and clear windows
+ */
+ for (i = 0; i < ETH_MAX_WIN; i++) {
+ orion_write(ETH_WIN_BASE(i), 0);
+ orion_write(ETH_WIN_SIZE(i), 0);
+ orion_setbits(ETH_WIN_EN, 1 << i);
+ orion_clrbits(ETH_WIN_PROT, 0x3 << (i * 2));
+ if (i < ETH_MAX_REMAP_WIN)
+ orion_write(ETH_WIN_REMAP(i), 0);
+ }
+
+ /*
+ * Setup windows for DDR banks.
+ */
+ for (i = 0; i < DDR_MAX_CS; i++) {
+ u32 base, size;
+ size = orion_read(DDR_SIZE_CS(i));
+ base = orion_read(DDR_BASE_CS(i));
+ if (size & DDR_BANK_EN) {
+ base = DDR_REG_TO_BASE(base);
+ size = DDR_REG_TO_SIZE(size);
+ orion_write(ETH_WIN_SIZE(i), (size-1) & 0xffff0000);
+ orion_write(ETH_WIN_BASE(i), (base & 0xffff0000) |
+ (ATTR_DDR_CS(i) << 8) |
+ TARGET_DDR);
+ orion_clrbits(ETH_WIN_EN, 1 << i);
+ orion_setbits(ETH_WIN_PROT, 0x3 << (i * 2));
+ }
+ }
+}
+
+void __init orion_setup_sata_wins(void)
+{
+ int i;
+
+ /*
+ * First, disable and clear windows
+ */
+ for (i = 0; i < SATA_MAX_WIN; i++) {
+ orion_write(SATA_WIN_BASE(i), 0);
+ orion_write(SATA_WIN_CTRL(i), 0);
+ }
+
+ /*
+ * Setup windows for DDR banks.
+ */
+ for (i = 0; i < DDR_MAX_CS; i++) {
+ u32 base, size;
+ size = orion_read(DDR_SIZE_CS(i));
+ base = orion_read(DDR_BASE_CS(i));
+ if (size & DDR_BANK_EN) {
+ base = DDR_REG_TO_BASE(base);
+ size = DDR_REG_TO_SIZE(size);
+ orion_write(SATA_WIN_CTRL(i),
+ ((size-1) & 0xffff0000) |
+ (ATTR_DDR_CS(i) << 8) |
+ (TARGET_DDR << 4) | WIN_EN);
+ orion_write(SATA_WIN_BASE(i),
+ base & 0xffff0000);
+ }
+ }
+}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.