1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * PROM library initialisation code.
7 *
8 * Copyright (C) 1999,2000,2004,2005,2012 MIPS Technologies, Inc.
9 * All rights reserved.
10 * Authors: Carsten Langgaard <carstenl@mips.com>
11 * Maciej W. Rozycki <macro@mips.com>
12 * Steven J. Hill <sjhill@mips.com>
13 */
14#include <linux/init.h>
15#include <linux/string.h>
16#include <linux/kernel.h>
17#include <linux/pci_regs.h>
18#include <linux/serial_core.h>
19
20#include <asm/cacheflush.h>
21#include <asm/smp-ops.h>
22#include <asm/traps.h>
23#include <asm/fw/fw.h>
24#include <asm/mips-cps.h>
25#include <asm/mips-boards/generic.h>
26#include <asm/mips-boards/malta.h>
27
28static int mips_revision_corid;
29int mips_revision_sconid;
30
31/* Bonito64 system controller register base. */
32unsigned long _pcictrl_bonito;
33unsigned long _pcictrl_bonito_pcicfg;
34
35/* GT64120 system controller register base */
36unsigned long _pcictrl_gt64120;
37
38/* MIPS System controller register base */
39unsigned long _pcictrl_msc;
40
41#ifdef CONFIG_SERIAL_8250_CONSOLE
42static void __init console_config(void)
43{
44 char console_string[40];
45 int baud = 0;
46 char parity = '\0', bits = '\0', flow = '\0';
47 char *s;
48
49 s = fw_getenv("modetty0");
50 if (s) {
51 while (*s >= '0' && *s <= '9')
52 baud = baud*10 + *s++ - '0';
53 if (*s == ',')
54 s++;
55 if (*s)
56 parity = *s++;
57 if (*s == ',')
58 s++;
59 if (*s)
60 bits = *s++;
61 if (*s == ',')
62 s++;
63 if (*s == 'h')
64 flow = 'r';
65 }
66 if (baud == 0)
67 baud = 38400;
68 if (parity != 'n' && parity != 'o' && parity != 'e')
69 parity = 'n';
70 if (bits != '7' && bits != '8')
71 bits = '8';
72 if (flow == '\0')
73 flow = 'r';
74
75 if ((strstr(fw_getcmdline(), "earlycon=")) == NULL) {
76 sprintf(buf: console_string, fmt: "uart8250,io,0x3f8,%d%c%c", baud,
77 parity, bits);
78 setup_earlycon(console_string);
79 }
80
81 if ((strstr(fw_getcmdline(), "console=")) == NULL) {
82 sprintf(buf: console_string, fmt: " console=ttyS0,%d%c%c%c", baud,
83 parity, bits, flow);
84 strcat(fw_getcmdline(), console_string);
85 pr_info("Config serial console:%s\n", console_string);
86 }
87}
88#endif
89
90static void __init mips_nmi_setup(void)
91{
92 void *base;
93
94 base = cpu_has_veic ?
95 (void *)(CAC_BASE + 0xa80) :
96 (void *)(CAC_BASE + 0x380);
97 memcpy(base, except_vec_nmi, 0x80);
98 flush_icache_range(start: (unsigned long)base, end: (unsigned long)base + 0x80);
99}
100
101static void __init mips_ejtag_setup(void)
102{
103 void *base;
104 extern char except_vec_ejtag_debug[];
105
106 base = cpu_has_veic ?
107 (void *)(CAC_BASE + 0xa00) :
108 (void *)(CAC_BASE + 0x300);
109 memcpy(base, except_vec_ejtag_debug, 0x80);
110 flush_icache_range(start: (unsigned long)base, end: (unsigned long)base + 0x80);
111}
112
113phys_addr_t mips_cpc_default_phys_base(void)
114{
115 return CPC_BASE_ADDR;
116}
117
118void __init prom_init(void)
119{
120 /*
121 * early setup of _pcictrl_bonito so that we can determine
122 * the system controller on a CORE_EMUL board
123 */
124 _pcictrl_bonito = (unsigned long)ioremap(BONITO_REG_BASE, BONITO_REG_SIZE);
125
126 mips_revision_corid = MIPS_REVISION_CORID;
127
128 if (mips_revision_corid == MIPS_REVISION_CORID_CORE_EMUL) {
129 if (BONITO_PCIDID == 0x0001df53 ||
130 BONITO_PCIDID == 0x0003df53)
131 mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_BON;
132 else
133 mips_revision_corid = MIPS_REVISION_CORID_CORE_EMUL_MSC;
134 }
135
136 mips_revision_sconid = MIPS_REVISION_SCONID;
137 if (mips_revision_sconid == MIPS_REVISION_SCON_OTHER) {
138 switch (mips_revision_corid) {
139 case MIPS_REVISION_CORID_QED_RM5261:
140 case MIPS_REVISION_CORID_CORE_LV:
141 case MIPS_REVISION_CORID_CORE_FPGA:
142 case MIPS_REVISION_CORID_CORE_FPGAR2:
143 mips_revision_sconid = MIPS_REVISION_SCON_GT64120;
144 break;
145 case MIPS_REVISION_CORID_CORE_EMUL_BON:
146 case MIPS_REVISION_CORID_BONITO64:
147 case MIPS_REVISION_CORID_CORE_20K:
148 mips_revision_sconid = MIPS_REVISION_SCON_BONITO;
149 break;
150 case MIPS_REVISION_CORID_CORE_MSC:
151 case MIPS_REVISION_CORID_CORE_FPGA2:
152 case MIPS_REVISION_CORID_CORE_24K:
153 /*
154 * SOCit/ROCit support is essentially identical
155 * but make an attempt to distinguish them
156 */
157 mips_revision_sconid = MIPS_REVISION_SCON_SOCIT;
158 break;
159 case MIPS_REVISION_CORID_CORE_FPGA3:
160 case MIPS_REVISION_CORID_CORE_FPGA4:
161 case MIPS_REVISION_CORID_CORE_FPGA5:
162 case MIPS_REVISION_CORID_CORE_EMUL_MSC:
163 default:
164 /* See above */
165 mips_revision_sconid = MIPS_REVISION_SCON_ROCIT;
166 break;
167 }
168 }
169
170 switch (mips_revision_sconid) {
171 u32 start, map, mask, data;
172
173 case MIPS_REVISION_SCON_GT64120:
174 /*
175 * Setup the North bridge to do Master byte-lane swapping
176 * when running in bigendian.
177 */
178 _pcictrl_gt64120 = (unsigned long)ioremap(MIPS_GT_BASE, 0x2000);
179
180#ifdef CONFIG_CPU_LITTLE_ENDIAN
181 GT_WRITE(GT_PCI0_CMD_OFS, GT_PCI0_CMD_MBYTESWAP_BIT |
182 GT_PCI0_CMD_SBYTESWAP_BIT);
183#else
184 GT_WRITE(GT_PCI0_CMD_OFS, 0);
185#endif
186 /* Fix up PCI I/O mapping if necessary (for Atlas). */
187 start = GT_READ(GT_PCI0IOLD_OFS);
188 map = GT_READ(GT_PCI0IOREMAP_OFS);
189 if ((start & map) != 0) {
190 map &= ~start;
191 GT_WRITE(GT_PCI0IOREMAP_OFS, map);
192 }
193
194 set_io_port_base(MALTA_GT_PORT_BASE);
195 break;
196
197 case MIPS_REVISION_SCON_BONITO:
198 _pcictrl_bonito_pcicfg = (unsigned long)ioremap(BONITO_PCICFG_BASE, BONITO_PCICFG_SIZE);
199
200 /*
201 * Disable Bonito IOBC.
202 */
203 BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
204 ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
205 BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
206
207 /*
208 * Setup the North bridge to do Master byte-lane swapping
209 * when running in bigendian.
210 */
211#ifdef CONFIG_CPU_LITTLE_ENDIAN
212 BONITO_BONGENCFG = BONITO_BONGENCFG &
213 ~(BONITO_BONGENCFG_MSTRBYTESWAP |
214 BONITO_BONGENCFG_BYTESWAP);
215#else
216 BONITO_BONGENCFG = BONITO_BONGENCFG |
217 BONITO_BONGENCFG_MSTRBYTESWAP |
218 BONITO_BONGENCFG_BYTESWAP;
219#endif
220
221 set_io_port_base(MALTA_BONITO_PORT_BASE);
222 break;
223
224 case MIPS_REVISION_SCON_SOCIT:
225 case MIPS_REVISION_SCON_ROCIT:
226 _pcictrl_msc = (unsigned long)ioremap(MIPS_MSC01_PCI_REG_BASE, 0x2000);
227mips_pci_controller:
228 mb();
229 MSC_READ(MSC01_PCI_CFG, data);
230 MSC_WRITE(MSC01_PCI_CFG, data & ~MSC01_PCI_CFG_EN_BIT);
231 wmb();
232
233 /* Fix up lane swapping. */
234#ifdef CONFIG_CPU_LITTLE_ENDIAN
235 MSC_WRITE(MSC01_PCI_SWAP, MSC01_PCI_SWAP_NOSWAP);
236#else
237 MSC_WRITE(MSC01_PCI_SWAP,
238 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_IO_SHF |
239 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_MEM_SHF |
240 MSC01_PCI_SWAP_BYTESWAP << MSC01_PCI_SWAP_BAR0_SHF);
241#endif
242
243 /*
244 * Set up memory mapping in host bridge for PCI DMA masters,
245 * in transparent addressing mode. For EVA use the Malta
246 * maximum of 2 GiB memory in the alias space at 0x80000000
247 * as per PHYS_OFFSET. Otherwise use 256 MiB of memory in
248 * the regular space, avoiding mapping the PCI MMIO window
249 * for DMA as it seems to confuse the system controller's
250 * logic, causing PCI MMIO to stop working.
251 */
252 mask = PHYS_OFFSET ? PHYS_OFFSET : 0xf0000000;
253 MSC_WRITE(MSC01_PCI_BAR0,
254 mask | PCI_BASE_ADDRESS_MEM_PREFETCH);
255 MSC_WRITE(MSC01_PCI_HEAD4,
256 PHYS_OFFSET | PCI_BASE_ADDRESS_MEM_PREFETCH);
257
258 MSC_WRITE(MSC01_PCI_P2SCMSKL, mask);
259 MSC_WRITE(MSC01_PCI_P2SCMAPL, PHYS_OFFSET);
260
261 /* Don't handle target retries indefinitely. */
262 if ((data & MSC01_PCI_CFG_MAXRTRY_MSK) ==
263 MSC01_PCI_CFG_MAXRTRY_MSK)
264 data = (data & ~(MSC01_PCI_CFG_MAXRTRY_MSK <<
265 MSC01_PCI_CFG_MAXRTRY_SHF)) |
266 ((MSC01_PCI_CFG_MAXRTRY_MSK - 1) <<
267 MSC01_PCI_CFG_MAXRTRY_SHF);
268
269 wmb();
270 MSC_WRITE(MSC01_PCI_CFG, data);
271 mb();
272
273 set_io_port_base(MALTA_MSC_PORT_BASE);
274 break;
275
276 case MIPS_REVISION_SCON_SOCITSC:
277 case MIPS_REVISION_SCON_SOCITSCP:
278 _pcictrl_msc = (unsigned long)ioremap(MIPS_SOCITSC_PCI_REG_BASE, 0x2000);
279 goto mips_pci_controller;
280
281 default:
282 /* Unknown system controller */
283 while (1); /* We die here... */
284 }
285 board_nmi_handler_setup = mips_nmi_setup;
286 board_ejtag_handler_setup = mips_ejtag_setup;
287
288 fw_init_cmdline();
289 fw_meminit();
290#ifdef CONFIG_SERIAL_8250_CONSOLE
291 console_config();
292#endif
293 /* Early detection of CMP support */
294 mips_cpc_probe();
295
296 if (!register_cps_smp_ops())
297 return;
298 if (!register_vsmp_smp_ops())
299 return;
300 register_up_smp_ops();
301}
302

source code of linux/arch/mips/mti-malta/malta-init.c