Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[sfrench/cifs-2.6.git] / arch / mips / mti-malta / malta-setup.c
1 /*
2  * Carsten Langgaard, carstenl@mips.com
3  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
4  * Copyright (C) 2008 Dmitri Vorobiev
5  *
6  *  This program is free software; you can distribute it and/or modify it
7  *  under the terms of the GNU General Public License (Version 2) as
8  *  published by the Free Software Foundation.
9  *
10  *  This program is distributed in the hope it will be useful, but WITHOUT
11  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13  *  for more details.
14  *
15  *  You should have received a copy of the GNU General Public License along
16  *  with this program; if not, write to the Free Software Foundation, Inc.,
17  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
18  */
19 #include <linux/cpu.h>
20 #include <linux/init.h>
21 #include <linux/sched.h>
22 #include <linux/ioport.h>
23 #include <linux/irq.h>
24 #include <linux/of_fdt.h>
25 #include <linux/pci.h>
26 #include <linux/screen_info.h>
27 #include <linux/time.h>
28
29 #include <asm/dma-coherence.h>
30 #include <asm/fw/fw.h>
31 #include <asm/mach-malta/malta-dtshim.h>
32 #include <asm/mips-cps.h>
33 #include <asm/mips-boards/generic.h>
34 #include <asm/mips-boards/malta.h>
35 #include <asm/mips-boards/maltaint.h>
36 #include <asm/dma.h>
37 #include <asm/prom.h>
38 #include <asm/traps.h>
39 #ifdef CONFIG_VT
40 #include <linux/console.h>
41 #endif
42
43 #define ROCIT_CONFIG_GEN0               0x1f403000
44 #define  ROCIT_CONFIG_GEN0_PCI_IOCU     BIT(7)
45
46 static struct resource standard_io_resources[] = {
47         {
48                 .name = "dma1",
49                 .start = 0x00,
50                 .end = 0x1f,
51                 .flags = IORESOURCE_IO | IORESOURCE_BUSY
52         },
53         {
54                 .name = "timer",
55                 .start = 0x40,
56                 .end = 0x5f,
57                 .flags = IORESOURCE_IO | IORESOURCE_BUSY
58         },
59         {
60                 .name = "keyboard",
61                 .start = 0x60,
62                 .end = 0x6f,
63                 .flags = IORESOURCE_IO | IORESOURCE_BUSY
64         },
65         {
66                 .name = "dma page reg",
67                 .start = 0x80,
68                 .end = 0x8f,
69                 .flags = IORESOURCE_IO | IORESOURCE_BUSY
70         },
71         {
72                 .name = "dma2",
73                 .start = 0xc0,
74                 .end = 0xdf,
75                 .flags = IORESOURCE_IO | IORESOURCE_BUSY
76         },
77 };
78
79 const char *get_system_type(void)
80 {
81         return "MIPS Malta";
82 }
83
84 #ifdef CONFIG_BLK_DEV_FD
85 static void __init fd_activate(void)
86 {
87         /*
88          * Activate Floppy Controller in the SMSC FDC37M817 Super I/O
89          * Controller.
90          * Done by YAMON 2.00 onwards
91          */
92         /* Entering config state. */
93         SMSC_WRITE(SMSC_CONFIG_ENTER, SMSC_CONFIG_REG);
94
95         /* Activate floppy controller. */
96         SMSC_WRITE(SMSC_CONFIG_DEVNUM, SMSC_CONFIG_REG);
97         SMSC_WRITE(SMSC_CONFIG_DEVNUM_FLOPPY, SMSC_DATA_REG);
98         SMSC_WRITE(SMSC_CONFIG_ACTIVATE, SMSC_CONFIG_REG);
99         SMSC_WRITE(SMSC_CONFIG_ACTIVATE_ENABLE, SMSC_DATA_REG);
100
101         /* Exit config state. */
102         SMSC_WRITE(SMSC_CONFIG_EXIT, SMSC_CONFIG_REG);
103 }
104 #endif
105
106 static int __init plat_enable_iocoherency(void)
107 {
108         int supported = 0;
109         u32 cfg;
110
111         if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO) {
112                 if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) {
113                         BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN;
114                         pr_info("Enabled Bonito CPU coherency\n");
115                         supported = 1;
116                 }
117                 if (strstr(fw_getcmdline(), "iobcuncached")) {
118                         BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN;
119                         BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
120                                 ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
121                                   BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
122                         pr_info("Disabled Bonito IOBC coherency\n");
123                 } else {
124                         BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN;
125                         BONITO_PCIMEMBASECFG |=
126                                 (BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
127                                  BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
128                         pr_info("Enabled Bonito IOBC coherency\n");
129                 }
130         } else if (mips_cps_numiocu(0) != 0) {
131                 /* Nothing special needs to be done to enable coherency */
132                 pr_info("CMP IOCU detected\n");
133                 cfg = __raw_readl((u32 *)CKSEG1ADDR(ROCIT_CONFIG_GEN0));
134                 if (!(cfg & ROCIT_CONFIG_GEN0_PCI_IOCU)) {
135                         pr_crit("IOCU OPERATION DISABLED BY SWITCH - DEFAULTING TO SW IO COHERENCY\n");
136                         return 0;
137                 }
138                 supported = 1;
139         }
140         hw_coherentio = supported;
141         return supported;
142 }
143
144 static void __init plat_setup_iocoherency(void)
145 {
146         if (plat_enable_iocoherency()) {
147                 if (coherentio == IO_COHERENCE_DISABLED)
148                         pr_info("Hardware DMA cache coherency disabled\n");
149                 else
150                         pr_info("Hardware DMA cache coherency enabled\n");
151         } else {
152                 if (coherentio == IO_COHERENCE_ENABLED)
153                         pr_info("Hardware DMA cache coherency unsupported, but enabled from command line!\n");
154                 else
155                         pr_info("Software DMA cache coherency enabled\n");
156         }
157 }
158
159 static void __init pci_clock_check(void)
160 {
161         unsigned int __iomem *jmpr_p =
162                 (unsigned int *) ioremap(MALTA_JMPRS_REG, sizeof(unsigned int));
163         int jmpr = (__raw_readl(jmpr_p) >> 2) & 0x07;
164         static const int pciclocks[] __initconst = {
165                 33, 20, 25, 30, 12, 16, 37, 10
166         };
167         int pciclock = pciclocks[jmpr];
168         char *optptr, *argptr = fw_getcmdline();
169
170         /*
171          * If user passed a pci_clock= option, don't tack on another one
172          */
173         optptr = strstr(argptr, "pci_clock=");
174         if (optptr && (optptr == argptr || optptr[-1] == ' '))
175                 return;
176
177         if (pciclock != 33) {
178                 pr_warn("WARNING: PCI clock is %dMHz, setting pci_clock\n",
179                         pciclock);
180                 argptr += strlen(argptr);
181                 sprintf(argptr, " pci_clock=%d", pciclock);
182                 if (pciclock < 20 || pciclock > 66)
183                         pr_warn("WARNING: IDE timing calculations will be "
184                                 "incorrect\n");
185         }
186 }
187
188 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
189 static void __init screen_info_setup(void)
190 {
191         screen_info = (struct screen_info) {
192                 .orig_x = 0,
193                 .orig_y = 25,
194                 .ext_mem_k = 0,
195                 .orig_video_page = 0,
196                 .orig_video_mode = 0,
197                 .orig_video_cols = 80,
198                 .unused2 = 0,
199                 .orig_video_ega_bx = 0,
200                 .unused3 = 0,
201                 .orig_video_lines = 25,
202                 .orig_video_isVGA = VIDEO_TYPE_VGAC,
203                 .orig_video_points = 16
204         };
205 }
206 #endif
207
208 static void __init bonito_quirks_setup(void)
209 {
210         char *argptr;
211
212         argptr = fw_getcmdline();
213         if (strstr(argptr, "debug")) {
214                 BONITO_BONGENCFG |= BONITO_BONGENCFG_DEBUGMODE;
215                 pr_info("Enabled Bonito debug mode\n");
216         } else
217                 BONITO_BONGENCFG &= ~BONITO_BONGENCFG_DEBUGMODE;
218 }
219
220 void __init *plat_get_fdt(void)
221 {
222         return (void *)__dtb_start;
223 }
224
225 void __init plat_mem_setup(void)
226 {
227         unsigned int i;
228         void *fdt = plat_get_fdt();
229
230         fdt = malta_dt_shim(fdt);
231         __dt_setup_arch(fdt);
232
233         if (IS_ENABLED(CONFIG_EVA))
234                 /* EVA has already been configured in mach-malta/kernel-init.h */
235                 pr_info("Enhanced Virtual Addressing (EVA) activated\n");
236
237         mips_pcibios_init();
238
239         /* Request I/O space for devices used on the Malta board. */
240         for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
241                 request_resource(&ioport_resource, standard_io_resources+i);
242
243         /*
244          * Enable DMA channel 4 (cascade channel) in the PIIX4 south bridge.
245          */
246         enable_dma(4);
247
248         if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO)
249                 bonito_quirks_setup();
250
251         plat_setup_iocoherency();
252
253         pci_clock_check();
254
255 #ifdef CONFIG_BLK_DEV_FD
256         fd_activate();
257 #endif
258
259 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
260         screen_info_setup();
261 #endif
262 }