2 * Copyright (C) 2013 Gabor Juhos <juhosg@openwrt.org>
4 * SPDX-License-Identifier: GPL-2.0
12 #include <asm/addrspace.h>
14 #include <asm/regdef.h>
15 #include <asm/malta.h>
16 #include <asm/mipsregs.h>
18 #ifdef CONFIG_SYS_BIG_ENDIAN
19 #define CPU_TO_GT32(_x) ((_x))
21 #define CPU_TO_GT32(_x) ( \
22 (((_x) & 0xff) << 24) | (((_x) & 0xff00) << 8) | \
23 (((_x) & 0xff0000) >> 8) | (((_x) & 0xff000000) >> 24))
31 /* detect the core card */
32 PTR_LI t0, CKSEG1ADDR(MALTA_REVISION)
34 srl t0, t0, MALTA_REVISION_CORID_SHF
35 andi t0, t0, (MALTA_REVISION_CORID_MSK >> \
36 MALTA_REVISION_CORID_SHF)
38 /* core cards using the gt64120 system controller */
39 li t1, MALTA_REVISION_CORID_CORE_LV
42 /* core cards using the MSC01 system controller */
43 li t1, MALTA_REVISION_CORID_CORE_FPGA6
47 /* unknown system controller */
52 * Load BAR registers of GT64120 as done by YAMON
54 * based on a patch sent by Antony Pavlov <antonynpavlov@gmail.com>
55 * to the barebox mailing list.
56 * The subject of the original patch:
57 * 'MIPS: qemu-malta: add YAMON-style GT64120 memory map'
59 * http://www.mail-archive.com/barebox@lists.infradead.org/msg06128.html
61 * based on write_bootloader() in qemu.git/hw/mips_malta.c
62 * see GT64120 manual and qemu.git/hw/gt64xxx.c for details
65 /* move GT64120 registers from 0x14000000 to 0x1be00000 */
66 PTR_LI t1, CKSEG1ADDR(GT_DEF_BASE)
67 li t0, CPU_TO_GT32(0xdf000000)
70 /* setup MEM-to-PCI0 mapping */
71 PTR_LI t1, CKSEG1ADDR(MALTA_GT_BASE)
73 /* setup PCI0 io window to 0x18000000-0x181fffff */
74 li t0, CPU_TO_GT32(0xc0000000)
75 sw t0, GT_PCI0IOLD_OFS(t1)
76 li t0, CPU_TO_GT32(0x40000000)
77 sw t0, GT_PCI0IOHD_OFS(t1)
79 /* setup PCI0 mem windows */
80 li t0, CPU_TO_GT32(0x80000000)
81 sw t0, GT_PCI0M0LD_OFS(t1)
82 li t0, CPU_TO_GT32(0x3f000000)
83 sw t0, GT_PCI0M0HD_OFS(t1)
85 li t0, CPU_TO_GT32(0xc1000000)
86 sw t0, GT_PCI0M1LD_OFS(t1)
87 li t0, CPU_TO_GT32(0x5e000000)
88 sw t0, GT_PCI0M1HD_OFS(t1)
97 /* setup peripheral bus controller clock divide */
98 PTR_LI t0, CKSEG1ADDR(MALTA_MSC01_PBC_BASE)
99 li t1, 0x1 << MSC01_PBC_CLKCFG_SHF
100 sw t1, MSC01_PBC_CLKCFG_OFS(t0)
102 /* tweak peripheral bus controller timings */
103 li t1, (0x1 << MSC01_PBC_CS0TIM_CDT_SHF) | \
104 (0x1 << MSC01_PBC_CS0TIM_CAT_SHF)
105 sw t1, MSC01_PBC_CS0TIM_OFS(t0)
106 li t1, (0x0 << MSC01_PBC_CS0RW_RDT_SHF) | \
107 (0x2 << MSC01_PBC_CS0RW_RAT_SHF) | \
108 (0x0 << MSC01_PBC_CS0RW_WDT_SHF) | \
109 (0x2 << MSC01_PBC_CS0RW_WAT_SHF)
110 sw t1, MSC01_PBC_CS0RW_OFS(t0)
111 lw t1, MSC01_PBC_CS0CFG_OFS(t0)
112 li t2, MSC01_PBC_CS0CFG_DTYP_MSK
114 ori t1, (0x0 << MSC01_PBC_CS0CFG_ADM_SHF) | \
115 (0x3 << MSC01_PBC_CS0CFG_WSIDLE_SHF) | \
116 (0x10 << MSC01_PBC_CS0CFG_WS_SHF)
117 sw t1, MSC01_PBC_CS0CFG_OFS(t0)
119 /* setup basic address decode */
120 PTR_LI t0, CKSEG1ADDR(MALTA_MSC01_BIU_BASE)
122 li t2, -CONFIG_SYS_MEM_SIZE
123 sw t1, MSC01_BIU_MCBAS1L_OFS(t0)
124 sw t2, MSC01_BIU_MCMSK1L_OFS(t0)
125 sw t1, MSC01_BIU_MCBAS2L_OFS(t0)
126 sw t2, MSC01_BIU_MCMSK2L_OFS(t0)
128 /* initialise IP1 - unused */
129 li t1, MALTA_MSC01_IP1_BASE
130 li t2, -MALTA_MSC01_IP1_SIZE
131 sw t1, MSC01_BIU_IP1BAS1L_OFS(t0)
132 sw t2, MSC01_BIU_IP1MSK1L_OFS(t0)
133 sw t1, MSC01_BIU_IP1BAS2L_OFS(t0)
134 sw t2, MSC01_BIU_IP1MSK2L_OFS(t0)
136 /* initialise IP2 - PCI */
137 li t1, MALTA_MSC01_IP2_BASE1
138 li t2, -MALTA_MSC01_IP2_SIZE1
139 sw t1, MSC01_BIU_IP2BAS1L_OFS(t0)
140 sw t2, MSC01_BIU_IP2MSK1L_OFS(t0)
141 li t1, MALTA_MSC01_IP2_BASE2
142 li t2, -MALTA_MSC01_IP2_SIZE2
143 sw t1, MSC01_BIU_IP2BAS2L_OFS(t0)
144 sw t2, MSC01_BIU_IP2MSK2L_OFS(t0)
146 /* initialise IP3 - peripheral bus controller */
147 li t1, MALTA_MSC01_IP3_BASE
148 li t2, -MALTA_MSC01_IP3_SIZE
149 sw t1, MSC01_BIU_IP3BAS1L_OFS(t0)
150 sw t2, MSC01_BIU_IP3MSK1L_OFS(t0)
151 sw t1, MSC01_BIU_IP3BAS2L_OFS(t0)
152 sw t2, MSC01_BIU_IP3MSK2L_OFS(t0)
154 /* setup PCI memory */
155 PTR_LI t0, CKSEG1ADDR(MALTA_MSC01_PCI_BASE)
156 li t1, MALTA_MSC01_PCIMEM_BASE
157 li t2, (-MALTA_MSC01_PCIMEM_SIZE) & MSC01_PCI_SC2PMMSKL_MSK_MSK
158 li t3, MALTA_MSC01_PCIMEM_MAP
159 sw t1, MSC01_PCI_SC2PMBASL_OFS(t0)
160 sw t2, MSC01_PCI_SC2PMMSKL_OFS(t0)
161 sw t3, MSC01_PCI_SC2PMMAPL_OFS(t0)
164 li t1, MALTA_MSC01_PCIIO_BASE
165 li t2, (-MALTA_MSC01_PCIIO_SIZE) & MSC01_PCI_SC2PIOMSKL_MSK_MSK
166 li t3, MALTA_MSC01_PCIIO_MAP
167 sw t1, MSC01_PCI_SC2PIOBASL_OFS(t0)
168 sw t2, MSC01_PCI_SC2PIOMSKL_OFS(t0)
169 sw t3, MSC01_PCI_SC2PIOMAPL_OFS(t0)
171 /* setup PCI_BAR0 memory window */
172 li t1, -CONFIG_SYS_MEM_SIZE
173 sw t1, MSC01_PCI_BAR0_OFS(t0)
175 /* setup PCI to SysCon/CPU translation */
176 sw t1, MSC01_PCI_P2SCMSKL_OFS(t0)
177 sw zero, MSC01_PCI_P2SCMAPL_OFS(t0)
179 /* setup PCI vendor & device IDs */
180 li t1, (PCI_VENDOR_ID_MIPS << MSC01_PCI_HEAD0_VENDORID_SHF) | \
181 (PCI_DEVICE_ID_MIPS_MSC01 << MSC01_PCI_HEAD0_DEVICEID_SHF)
182 sw t1, MSC01_PCI_HEAD0_OFS(t0)
184 /* setup PCI subsystem vendor & device IDs */
185 sw t1, MSC01_PCI_HEAD11_OFS(t0)
187 /* setup PCI class, revision */
188 li t1, (PCI_CLASS_BRIDGE_HOST << MSC01_PCI_HEAD2_CLASS_SHF) | \
189 (0x1 << MSC01_PCI_HEAD2_REV_SHF)
190 sw t1, MSC01_PCI_HEAD2_OFS(t0)
192 /* ensure a sane setup */
193 sw zero, MSC01_PCI_HEAD3_OFS(t0)
194 sw zero, MSC01_PCI_HEAD4_OFS(t0)
195 sw zero, MSC01_PCI_HEAD5_OFS(t0)
196 sw zero, MSC01_PCI_HEAD6_OFS(t0)
197 sw zero, MSC01_PCI_HEAD7_OFS(t0)
198 sw zero, MSC01_PCI_HEAD8_OFS(t0)
199 sw zero, MSC01_PCI_HEAD9_OFS(t0)
200 sw zero, MSC01_PCI_HEAD10_OFS(t0)
201 sw zero, MSC01_PCI_HEAD12_OFS(t0)
202 sw zero, MSC01_PCI_HEAD13_OFS(t0)
203 sw zero, MSC01_PCI_HEAD14_OFS(t0)
204 sw zero, MSC01_PCI_HEAD15_OFS(t0)
206 /* setup PCI command register */
207 li t1, (PCI_COMMAND_FAST_BACK | \
209 PCI_COMMAND_PARITY | \
210 PCI_COMMAND_MASTER | \
212 sw t1, MSC01_PCI_HEAD1_OFS(t0)
214 /* setup PCI byte swapping */
215 #ifdef CONFIG_SYS_BIG_ENDIAN
216 li t1, (0x1 << MSC01_PCI_SWAP_BAR0_BSWAP_SHF) | \
217 (0x1 << MSC01_PCI_SWAP_IO_BSWAP_SHF)
218 sw t1, MSC01_PCI_SWAP_OFS(t0)
220 sw zero, MSC01_PCI_SWAP_OFS(t0)
223 /* enable PCI host configuration cycles */
224 lw t1, MSC01_PCI_CFG_OFS(t0)
225 li t2, MSC01_PCI_CFG_RA_MSK | \
226 MSC01_PCI_CFG_G_MSK | \
229 sw t1, MSC01_PCI_CFG_OFS(t0)