root/arch/powerpc/include/asm/uninorth.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * uninorth.h: definitions for using the "UniNorth" host bridge chip
   4  *             from Apple. This chip is used on "Core99" machines
   5  *             This also includes U2 used on more recent MacRISC2/3
   6  *             machines and U3 (G5) 
   7  *
   8  */
   9 #ifdef __KERNEL__
  10 #ifndef __ASM_UNINORTH_H__
  11 #define __ASM_UNINORTH_H__
  12 
  13 /*
  14  * Uni-N and U3 config space reg. definitions
  15  *
  16  * (Little endian)
  17  */
  18 
  19 /* Address ranges selection. This one should work with Bandit too */
  20 /* Not U3 */
  21 #define UNI_N_ADDR_SELECT               0x48
  22 #define UNI_N_ADDR_COARSE_MASK          0xffff0000      /* 256Mb regions at *0000000 */
  23 #define UNI_N_ADDR_FINE_MASK            0x0000ffff      /*  16Mb regions at f*000000 */
  24 
  25 /* AGP registers */
  26 /* Not U3 */
  27 #define UNI_N_CFG_GART_BASE             0x8c
  28 #define UNI_N_CFG_AGP_BASE              0x90
  29 #define UNI_N_CFG_GART_CTRL             0x94
  30 #define UNI_N_CFG_INTERNAL_STATUS       0x98
  31 #define UNI_N_CFG_GART_DUMMY_PAGE       0xa4
  32 
  33 /* UNI_N_CFG_GART_CTRL bits definitions */
  34 #define UNI_N_CFG_GART_INVAL            0x00000001
  35 #define UNI_N_CFG_GART_ENABLE           0x00000100
  36 #define UNI_N_CFG_GART_2xRESET          0x00010000
  37 #define UNI_N_CFG_GART_DISSBADET        0x00020000
  38 /* The following seems to only be used only on U3 <j.glisse@gmail.com> */
  39 #define U3_N_CFG_GART_SYNCMODE          0x00040000
  40 #define U3_N_CFG_GART_PERFRD            0x00080000
  41 #define U3_N_CFG_GART_B2BGNT            0x00200000
  42 #define U3_N_CFG_GART_FASTDDR           0x00400000
  43 
  44 /* My understanding of UniNorth AGP as of UniNorth rev 1.0x,
  45  * revision 1.5 (x4 AGP) may need further changes.
  46  *
  47  * AGP_BASE register contains the base address of the AGP aperture on
  48  * the AGP bus. It doesn't seem to be visible to the CPU as of UniNorth 1.x,
  49  * even if decoding of this address range is enabled in the address select
  50  * register. Apparently, the only supported bases are 256Mb multiples
  51  * (high 4 bits of that register).
  52  *
  53  * GART_BASE register appear to contain the physical address of the GART
  54  * in system memory in the high address bits (page aligned), and the
  55  * GART size in the low order bits (number of GART pages)
  56  *
  57  * The GART format itself is one 32bits word per physical memory page.
  58  * This word contains, in little-endian format (!!!), the physical address
  59  * of the page in the high bits, and what appears to be an "enable" bit
  60  * in the LSB bit (0) that must be set to 1 when the entry is valid.
  61  *
  62  * Obviously, the GART is not cache coherent and so any change to it
  63  * must be flushed to memory (or maybe just make the GART space non
  64  * cachable). AGP memory itself doesn't seem to be cache coherent neither.
  65  *
  66  * In order to invalidate the GART (which is probably necessary to inval
  67  * the bridge internal TLBs), the following sequence has to be written,
  68  * in order, to the GART_CTRL register:
  69  *
  70  *   UNI_N_CFG_GART_ENABLE | UNI_N_CFG_GART_INVAL
  71  *   UNI_N_CFG_GART_ENABLE
  72  *   UNI_N_CFG_GART_ENABLE | UNI_N_CFG_GART_2xRESET
  73  *   UNI_N_CFG_GART_ENABLE
  74  *
  75  * As far as AGP "features" are concerned, it looks like fast write may
  76  * not be supported but this has to be confirmed.
  77  *
  78  * Turning on AGP seem to require a double invalidate operation, one before
  79  * setting the AGP command register, on after.
  80  *
  81  * Turning off AGP seems to require the following sequence: first wait
  82  * for the AGP to be idle by reading the internal status register, then
  83  * write in that order to the GART_CTRL register:
  84  *
  85  *   UNI_N_CFG_GART_ENABLE | UNI_N_CFG_GART_INVAL
  86  *   0
  87  *   UNI_N_CFG_GART_2xRESET
  88  *   0
  89  */
  90 
  91 /*
  92  * Uni-N memory mapped reg. definitions
  93  *
  94  * Those registers are Big-Endian !!
  95  *
  96  * Their meaning come from either Darwin and/or from experiments I made with
  97  * the bootrom, I'm not sure about their exact meaning yet
  98  *
  99  */
 100 
 101 /* Version of the UniNorth chip */
 102 #define UNI_N_VERSION                   0x0000          /* Known versions: 3,7 and 8 */
 103 
 104 #define UNI_N_VERSION_107               0x0003          /* 1.0.7 */
 105 #define UNI_N_VERSION_10A               0x0007          /* 1.0.10 */
 106 #define UNI_N_VERSION_150               0x0011          /* 1.5 */
 107 #define UNI_N_VERSION_200               0x0024          /* 2.0 */
 108 #define UNI_N_VERSION_PANGEA            0x00C0          /* Integrated U1 + K */
 109 #define UNI_N_VERSION_INTREPID          0x00D2          /* Integrated U2 + K */
 110 #define UNI_N_VERSION_300               0x0030          /* 3.0 (U3 on G5) */
 111 
 112 /* This register is used to enable/disable various clocks */
 113 #define UNI_N_CLOCK_CNTL                0x0020
 114 #define UNI_N_CLOCK_CNTL_PCI            0x00000001      /* PCI2 clock control */
 115 #define UNI_N_CLOCK_CNTL_GMAC           0x00000002      /* GMAC clock control */
 116 #define UNI_N_CLOCK_CNTL_FW             0x00000004      /* FireWire clock control */
 117 #define UNI_N_CLOCK_CNTL_ATA100         0x00000010      /* ATA-100 clock control (U2) */
 118 
 119 /* Power Management control */
 120 #define UNI_N_POWER_MGT                 0x0030
 121 #define UNI_N_POWER_MGT_NORMAL          0x00
 122 #define UNI_N_POWER_MGT_IDLE2           0x01
 123 #define UNI_N_POWER_MGT_SLEEP           0x02
 124 
 125 /* This register is configured by Darwin depending on the UniN
 126  * revision
 127  */
 128 #define UNI_N_ARB_CTRL                  0x0040
 129 #define UNI_N_ARB_CTRL_QACK_DELAY_SHIFT 15
 130 #define UNI_N_ARB_CTRL_QACK_DELAY_MASK  0x0e1f8000
 131 #define UNI_N_ARB_CTRL_QACK_DELAY       0x30
 132 #define UNI_N_ARB_CTRL_QACK_DELAY105    0x00
 133 
 134 /* This one _might_ return the CPU number of the CPU reading it;
 135  * the bootROM decides whether to boot or to sleep/spinloop depending
 136  * on this register being 0 or not
 137  */
 138 #define UNI_N_CPU_NUMBER                0x0050
 139 
 140 /* This register appear to be read by the bootROM to decide what
 141  *  to do on a non-recoverable reset (powerup or wakeup)
 142  */
 143 #define UNI_N_HWINIT_STATE              0x0070
 144 #define UNI_N_HWINIT_STATE_SLEEPING     0x01
 145 #define UNI_N_HWINIT_STATE_RUNNING      0x02
 146 /* This last bit appear to be used by the bootROM to know the second
 147  * CPU has started and will enter it's sleep loop with IP=0
 148  */
 149 #define UNI_N_HWINIT_STATE_CPU1_FLAG    0x10000000
 150 
 151 /* This register controls AACK delay, which is set when 2004 iBook/PowerBook
 152  * is in low speed mode.
 153  */
 154 #define UNI_N_AACK_DELAY                0x0100
 155 #define UNI_N_AACK_DELAY_ENABLE         0x00000001
 156 
 157 /* Clock status for Intrepid */
 158 #define UNI_N_CLOCK_STOP_STATUS0        0x0150
 159 #define UNI_N_CLOCK_STOPPED_EXTAGP      0x00200000
 160 #define UNI_N_CLOCK_STOPPED_AGPDEL      0x00100000
 161 #define UNI_N_CLOCK_STOPPED_I2S0_45_49  0x00080000
 162 #define UNI_N_CLOCK_STOPPED_I2S0_18     0x00040000
 163 #define UNI_N_CLOCK_STOPPED_I2S1_45_49  0x00020000
 164 #define UNI_N_CLOCK_STOPPED_I2S1_18     0x00010000
 165 #define UNI_N_CLOCK_STOPPED_TIMER       0x00008000
 166 #define UNI_N_CLOCK_STOPPED_SCC_RTCLK18 0x00004000
 167 #define UNI_N_CLOCK_STOPPED_SCC_RTCLK32 0x00002000
 168 #define UNI_N_CLOCK_STOPPED_SCC_VIA32   0x00001000
 169 #define UNI_N_CLOCK_STOPPED_SCC_SLOT0   0x00000800
 170 #define UNI_N_CLOCK_STOPPED_SCC_SLOT1   0x00000400
 171 #define UNI_N_CLOCK_STOPPED_SCC_SLOT2   0x00000200
 172 #define UNI_N_CLOCK_STOPPED_PCI_FBCLKO  0x00000100
 173 #define UNI_N_CLOCK_STOPPED_VEO0        0x00000080
 174 #define UNI_N_CLOCK_STOPPED_VEO1        0x00000040
 175 #define UNI_N_CLOCK_STOPPED_USB0        0x00000020
 176 #define UNI_N_CLOCK_STOPPED_USB1        0x00000010
 177 #define UNI_N_CLOCK_STOPPED_USB2        0x00000008
 178 #define UNI_N_CLOCK_STOPPED_32          0x00000004
 179 #define UNI_N_CLOCK_STOPPED_45          0x00000002
 180 #define UNI_N_CLOCK_STOPPED_49          0x00000001
 181 
 182 #define UNI_N_CLOCK_STOP_STATUS1        0x0160
 183 #define UNI_N_CLOCK_STOPPED_PLL4REF     0x00080000
 184 #define UNI_N_CLOCK_STOPPED_CPUDEL      0x00040000
 185 #define UNI_N_CLOCK_STOPPED_CPU         0x00020000
 186 #define UNI_N_CLOCK_STOPPED_BUF_REFCKO  0x00010000
 187 #define UNI_N_CLOCK_STOPPED_PCI2        0x00008000
 188 #define UNI_N_CLOCK_STOPPED_FW          0x00004000
 189 #define UNI_N_CLOCK_STOPPED_GB          0x00002000
 190 #define UNI_N_CLOCK_STOPPED_ATA66       0x00001000
 191 #define UNI_N_CLOCK_STOPPED_ATA100      0x00000800
 192 #define UNI_N_CLOCK_STOPPED_MAX         0x00000400
 193 #define UNI_N_CLOCK_STOPPED_PCI1        0x00000200
 194 #define UNI_N_CLOCK_STOPPED_KLPCI       0x00000100
 195 #define UNI_N_CLOCK_STOPPED_USB0PCI     0x00000080
 196 #define UNI_N_CLOCK_STOPPED_USB1PCI     0x00000040
 197 #define UNI_N_CLOCK_STOPPED_USB2PCI     0x00000020
 198 #define UNI_N_CLOCK_STOPPED_7PCI1       0x00000008
 199 #define UNI_N_CLOCK_STOPPED_AGP         0x00000004
 200 #define UNI_N_CLOCK_STOPPED_PCI0        0x00000002
 201 #define UNI_N_CLOCK_STOPPED_18          0x00000001
 202 
 203 /* Intrepid registe to OF do-platform-clockspreading */
 204 #define UNI_N_CLOCK_SPREADING           0x190
 205 
 206 /* Uninorth 1.5 rev. has additional perf. monitor registers at 0xf00-0xf50 */
 207 
 208 
 209 /*
 210  * U3 specific registers
 211  */
 212 
 213 
 214 /* U3 Toggle */
 215 #define U3_TOGGLE_REG                   0x00e0
 216 #define U3_PMC_START_STOP               0x0001
 217 #define U3_MPIC_RESET                   0x0002
 218 #define U3_MPIC_OUTPUT_ENABLE           0x0004
 219 
 220 /* U3 API PHY Config 1 */
 221 #define U3_API_PHY_CONFIG_1             0x23030
 222 
 223 /* U3 HyperTransport registers */
 224 #define U3_HT_CONFIG_BASE               0x70000
 225 #define U3_HT_LINK_COMMAND              0x100
 226 #define U3_HT_LINK_CONFIG               0x110
 227 #define U3_HT_LINK_FREQ                 0x120
 228 
 229 #endif /* __ASM_UNINORTH_H__ */
 230 #endif /* __KERNEL__ */