1/*  *********************************************************************
2    *  BCM47xx Board Support Package
3    *
4    *  Board-specific initialization		File: bcm94704cpci_init.S
5    *
6    *  This module contains the assembly-language part of the init
7    *  code for this board support package.  The routine
8    *  "board_earlyinit" lives here.
9    *
10   *********************************************************************
11    *
12    *  Copyright 2000,2001,2002,2003
13    *  Broadcom Corporation. All rights reserved.
14    *
15    *  This software is furnished under license and may be used and
16    *  copied only in accordance with the following terms and
17    *  conditions.  Subject to these conditions, you may download,
18    *  copy, install, use, modify and distribute modified or unmodified
19    *  copies of this software in source and/or binary form.  No title
20    *  or ownership is transferred hereby.
21    *
22    *  1) Any source code used, modified or distributed must reproduce
23    *     and retain this copyright notice and list of conditions
24    *     as they appear in the source file.
25    *
26    *  2) No right is granted to use any trade name, trademark, or
27    *     logo of Broadcom Corporation.  The "Broadcom Corporation"
28    *     name may not be used to endorse or promote products derived
29    *     from this software without the prior written permission of
30    *     Broadcom Corporation.
31    *
32    *  3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
33    *     IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
34    *     WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
35    *     PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
36    *     SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
37    *     PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
38    *     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
39    *     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
40    *     GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
41    *     BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
42    *     OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
43    *     TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
44    *     THE POSSIBILITY OF SUCH DAMAGE.
45    ********************************************************************* */
46
47
48#include "endian.h"
49#include "cpu_config.h"
50#include "sbmips32.h"
51#include "sb_bp.h"
52#include "sb_chipc.h"
53#include "bsp_config.h"
54
55		.text
56
57/*  *********************************************************************
58    *  Macros
59    ********************************************************************* */
60
61/* LED digits are selected by M_ADDR[4:3] in this revision. */
62
63#define LED_DIGIT(n)  ((n)<<3)
64
65
66/*  *********************************************************************
67    *  BOARD_EARLYINIT()
68    *
69    *  Initialize board registers.  This is the earliest
70    *  time the BSP gets control.  This routine cannot assume that
71    *  memory is operational, and therefore all code in this routine
72    *  must run from registers only.  The $ra register must not
73    *  be modified, as it contains the return address.
74    *
75    *  This routine will be called from uncached space, before
76    *  the caches are initialized.  If you want to make
77    *  subroutine calls from here, you must use the CALLKSEG1 macro.
78    *
79    *  Among other things, this is where the GPIO registers get
80    *  programmed to make on-board LEDs function, or other startup
81    *  that has to be done before anything will work.
82    *
83    *  Input parameters:
84    *  	   nothing
85    *
86    *  Return value:
87    *  	   nothing
88    ********************************************************************* */
89
90LEAF(board_earlyinit)
91
92
93	#
94	# Configure the external interface so we can access LEDs, etc.
95	#
96
97		li	a2, PHYS_TO_K1(SB_CHIPC_BASE)
98
99	#
100	# CS0 is used to access the following devices:
101	#   alphanumeric LEDs (Osram slr2016)
102	#   TOD/NVRAM (Dallas ds1743)
103	#
104	# To avoid the various chipc/UART errata, the suggested workaround
105	# is to set w1+w3 < 7.  We set w1 = 2 and w3 = 4 below; the w3 value
106	# is out of spec for the LEDs at backplane frequencies above 100 MHz,
107	# but the PLD (Altera epm7032ae) effectively extends w3 by its
108	# (unspecified) minimum propagation delay.
109	#
110
111		li	a3, (V_CS_EM(2) | M_CS_EN)     /* enable the leds */
112		sw	a3, R_CS01CONFIG(a2)
113		li	a3, (V_CS_W0(16)|V_CS_W1(2)|V_CS_W2(14)|V_CS_W3(4))
114		sw	a3, R_CS01MEMWAITCNT(a2)       /* 0x040E0210 */
115
116		li	a3, M_CS_EN	               /* enable alt flash */
117		sw	a3, R_CS4CONFIG(a2)
118		li	a3, (V_CS_W0(16)|V_CS_W1(2)|V_CS_W2(14)|V_CS_W3(4))
119		sw	a3, R_CS4WAITCNT(a2)           /* 0x040E0210 */
120
121	#
122	# Use CP0 Diagnostic Register to turn on the caches (I$ and D$)
123	#
124		mfc0	v0,C0_DIAGNOSTIC
125		or	v0,(M_BCM0_DE | M_BCM0_IE)
126		mtc0	v0,C0_DIAGNOSTIC
127
128		li	a2, PHYS_TO_K1(BCM95836_CPCI_LED_ADDR)
129		li	a3, 0x2A
130		sw	a3, LED_DIGIT(0)(a2)
131
132		jr	ra
133
134
135END(board_earlyinit)
136
137
138/*  *********************************************************************
139    *  BOARD_SETLEDS(x)
140    *
141    *  Set LEDs for boot-time progress indication.  Not used if
142    *  the board does not have progress LEDs.  This routine
143    *  must not call any other routines, since it may be invoked
144    *  either from KSEG0 or KSEG1 and it may be invoked
145    *  whether or not the icache is operational.
146    *
147    *  Input parameters:
148    *  	   a0 - LED value (8 bits per character, 4 characters)
149    *
150    *  Return value:
151    *  	   nothing
152    *
153    *  Registers used:
154    *  	   t0
155    ********************************************************************* */
156
157
158LEAF(board_setleds)
159
160		li	t0,PHYS_TO_K1(BCM95836_CPCI_LED_ADDR)
161		rol	a0,a0,8
162		sb	a0,LED_DIGIT(3)(t0)
163		rol	a0,a0,8
164		sb	a0,LED_DIGIT(2)(t0)
165		rol	a0,a0,8
166		sb	a0,LED_DIGIT(1)(t0)
167		rol	a0,a0,8
168		sb	a0,LED_DIGIT(0)(t0)
169		j	ra
170
171END(board_setleds)
172
173
174
175/*  *********************************************************************
176    *  Misc functions
177    ********************************************************************* */
178
179	.set	mips32
180
181	.globl	read_config0
182read_config0:
183	mfc0	v0,C0_CONFIG,0
184	j	ra
185
186	.globl	read_config1
187read_config1:
188	mfc0	v0,C0_CONFIG,1
189	j	ra
190
191	.globl	read_bcm0
192read_bcm0:
193	mfc0	v0,C0_BRCMCFG,0
194	j	ra
195
196	.globl	read_bcm1
197read_bcm1:
198	mfc0	v0,C0_BRCMCFG,1
199	j	ra
200
201	.globl	read_bcm2
202read_bcm2:
203	mfc0	v0,C0_BRCMCFG,2
204	j	ra
205
206	.globl	read_bcm3
207read_bcm3:
208	mfc0	v0,C0_BRCMCFG,3
209	j	ra
210
211	.globl	read_bcm4
212read_bcm4:
213	mfc0	v0,C0_BRCMCFG,4
214	j	ra
215
216	.globl	read_bcm5
217read_bcm5:
218	mfc0	v0,C0_BRCMCFG,5
219	j	ra
220
221	.globl	read_bcm6
222read_bcm6:
223	mfc0	v0,C0_BRCMCFG,6
224	j	ra
225
226	.globl	read_bcm7
227read_bcm7:
228	mfc0	v0,C0_BRCMCFG,7
229	j	ra
230