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