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 its 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__ */ 231