arch/arm/mach-orion5x/addr-map.c

   1 /*
   2  * arch/arm/mach-orion5x/addr-map.c
   3  *
   4  * Address map functions for Marvell Orion 5x SoCs
   5  *
   6  * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
   7  *
   8  * This file is licensed under the terms of the GNU General Public
   9  * License version 2.  This program is licensed "as is" without any
  10  * warranty of any kind, whether express or implied.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/mbus.h>
  16 #include <linux/io.h>
  17 #include <mach/hardware.h>
  18 #include <plat/addr-map.h>
  19 #include "common.h"
  20
  21 /*
  22  * The Orion has fully programmable address map. There's a separate address
  23  * map for each of the device _master_ interfaces, e.g. CPU, PCI, PCIe, USB,
  24  * Gigabit Ethernet, DMA/XOR engines, etc. Each interface has its own
  25  * address decode windows that allow it to access any of the Orion resources.
  26  *
  27  * CPU address decoding --
  28  * Linux assumes that it is the boot loader that already setup the access to
  29  * DDR and internal registers.
  30  * Setup access to PCI and PCIe IO/MEM space is issued by this file.
  31  * Setup access to various devices located on the device bus interface (e.g.
  32  * flashes, RTC, etc) should be issued by machine-setup.c according to
  33  * specific board population (by using orion5x_setup_*_win()).
  34  *
  35  * Non-CPU Masters address decoding --
  36  * Unlike the CPU, we setup the access from Orion's master interfaces to DDR
  37  * banks only (the typical use case).
  38  * Setup access for each master to DDR is issued by platform device setup.
  39  */
  40
  41 /*
  42  * Generic Address Decode Windows bit settings
  43  */
  44 #define TARGET_DEV_BUS          1
  45 #define TARGET_PCI              3
  46 #define TARGET_PCIE             4
  47 #define TARGET_SRAM             9
  48 #define ATTR_PCIE_MEM           0x59
  49 #define ATTR_PCIE_IO            0x51
  50 #define ATTR_PCIE_WA            0x79
  51 #define ATTR_PCI_MEM            0x59
  52 #define ATTR_PCI_IO             0x51
  53 #define ATTR_DEV_CS0            0x1e
  54 #define ATTR_DEV_CS1            0x1d
  55 #define ATTR_DEV_CS2            0x1b
  56 #define ATTR_DEV_BOOT           0xf
  57 #define ATTR_SRAM               0x0
  58
  59 static int __initdata win_alloc_count;
  60
  61 static int __init cpu_win_can_remap(const struct orion_addr_map_cfg *cfg,
  62                   const int win)
  63 {
  64         u32 dev, rev;
  65
  66         orion5x_pcie_id(&dev, &rev);
  67         if ((dev == MV88F5281_DEV_ID && win < 4)
  68             || (dev == MV88F5182_DEV_ID && win < 2)
  69             || (dev == MV88F5181_DEV_ID && win < 2)
  70             || (dev == MV88F6183_DEV_ID && win < 4))
  71                 return 1;
  72
  73         return 0;
  74 }
  75
  76 /*
  77  * Description of the windows needed by the platform code
  78  */
  79 static struct orion_addr_map_cfg addr_map_cfg __initdata = {
  80         .num_wins = 8,
  81         .cpu_win_can_remap = cpu_win_can_remap,
  82         .bridge_virt_base = ORION5X_BRIDGE_VIRT_BASE,
  83 };
  84
  85 static const struct __initdata orion_addr_map_info addr_map_info[] = {
  86         /*
  87          * Setup windows for PCI+PCIe IO+MEM space.
  88          */
  89         { 0, ORION5X_PCIE_IO_PHYS_BASE, ORION5X_PCIE_IO_SIZE,
  90           TARGET_PCIE, ATTR_PCIE_IO, ORION5X_PCIE_IO_BUS_BASE
  91         },
  92         { 1, ORION5X_PCI_IO_PHYS_BASE, ORION5X_PCI_IO_SIZE,
  93           TARGET_PCI, ATTR_PCI_IO, ORION5X_PCI_IO_BUS_BASE
  94         },
  95         { 2, ORION5X_PCIE_MEM_PHYS_BASE, ORION5X_PCIE_MEM_SIZE,
  96           TARGET_PCIE, ATTR_PCIE_MEM, -1
  97         },
  98         { 3, ORION5X_PCI_MEM_PHYS_BASE, ORION5X_PCI_MEM_SIZE,
  99           TARGET_PCI, ATTR_PCI_MEM, -1
 100         },
 101         /* End marker */
 102         { -1, 0, 0, 0, 0, 0 }
 103 };
 104
 105 void __init orion5x_setup_cpu_mbus_bridge(void)
 106 {
 107         /*
 108          * Disable, clear and configure windows.
 109          */
 110         orion_config_wins(&addr_map_cfg, addr_map_info);
 111         win_alloc_count = 4;
 112
 113         /*
 114          * Setup MBUS dram target info.
 115          */
 116         orion_setup_cpu_mbus_target(&addr_map_cfg,
 117                                     (void __iomem *) ORION5X_DDR_WINDOW_CPU_BASE);
 118 }
 119
 120 void __init orion5x_setup_dev_boot_win(u32 base, u32 size)
 121 {
 122         orion_setup_cpu_win(&addr_map_cfg, win_alloc_count++, base, size,
 123                             TARGET_DEV_BUS, ATTR_DEV_BOOT, -1);
 124 }
 125
 126 void __init orion5x_setup_dev0_win(u32 base, u32 size)
 127 {
 128         orion_setup_cpu_win(&addr_map_cfg, win_alloc_count++, base, size,
 129                             TARGET_DEV_BUS, ATTR_DEV_CS0, -1);
 130 }
 131
 132 void __init orion5x_setup_dev1_win(u32 base, u32 size)
 133 {
 134         orion_setup_cpu_win(&addr_map_cfg, win_alloc_count++, base, size,
 135                             TARGET_DEV_BUS, ATTR_DEV_CS1, -1);
 136 }
 137
 138 void __init orion5x_setup_dev2_win(u32 base, u32 size)
 139 {
 140         orion_setup_cpu_win(&addr_map_cfg, win_alloc_count++, base, size,
 141                             TARGET_DEV_BUS, ATTR_DEV_CS2, -1);
 142 }
 143
 144 void __init orion5x_setup_pcie_wa_win(u32 base, u32 size)
 145 {
 146         orion_setup_cpu_win(&addr_map_cfg, win_alloc_count++, base, size,
 147                             TARGET_PCIE, ATTR_PCIE_WA, -1);
 148 }
 149
 150 void __init orion5x_setup_sram_win(void)
 151 {
 152         orion_setup_cpu_win(&addr_map_cfg, win_alloc_count++,
 153                             ORION5X_SRAM_PHYS_BASE, ORION5X_SRAM_SIZE,
 154                             TARGET_SRAM, ATTR_SRAM, -1);
 155 }