Merge with /home/shaggy/git/linus-clean/
[linux-2.6] / arch / ppc / platforms / mvme5100.c
1 /*
2  * arch/ppc/platforms/mvme5100.c
3  *
4  * Board setup routines for the Motorola MVME5100.
5  *
6  * Author: Matt Porter <mporter@mvista.com>
7  *
8  * 2001-2004 (c) MontaVista, Software, Inc.  This file is licensed under
9  * the terms of the GNU General Public License version 2.  This program
10  * is licensed "as is" without any warranty of any kind, whether express
11  * or implied.
12  */
13
14 #include <linux/config.h>
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/errno.h>
19 #include <linux/pci.h>
20 #include <linux/initrd.h>
21 #include <linux/console.h>
22 #include <linux/delay.h>
23 #include <linux/irq.h>
24 #include <linux/ide.h>
25 #include <linux/seq_file.h>
26 #include <linux/kdev_t.h>
27 #include <linux/root_dev.h>
28
29 #include <asm/system.h>
30 #include <asm/pgtable.h>
31 #include <asm/page.h>
32 #include <asm/dma.h>
33 #include <asm/io.h>
34 #include <asm/machdep.h>
35 #include <asm/open_pic.h>
36 #include <asm/i8259.h>
37 #include <asm/todc.h>
38 #include <asm/pci-bridge.h>
39 #include <asm/bootinfo.h>
40 #include <asm/hawk.h>
41
42 #include <platforms/pplus.h>
43 #include <platforms/mvme5100.h>
44
45 static u_char mvme5100_openpic_initsenses[16] __initdata = {
46         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* i8259 cascade */
47         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* TL16C550 UART 1,2 */
48         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Enet1 front panel or P2 */
49         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Hawk Watchdog 1,2 */
50         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* DS1621 thermal alarm */
51         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT0# */
52         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT1# */
53         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT2# */
54         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT3# */
55         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTA#, PMC2 INTB# */
56         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTB#, PMC2 INTC# */
57         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTC#, PMC2 INTD# */
58         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTD#, PMC2 INTA# */
59         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Enet 2 (front panel) */
60         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Abort Switch */
61         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* RTC Alarm */
62 };
63
64 static inline int
65 mvme5100_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
66 {
67         int irq;
68
69         static char pci_irq_table[][4] =
70         /*
71          *      PCI IDSEL/INTPIN->INTLINE
72          *         A   B   C   D
73          */
74         {
75                 {  0,  0,  0,  0 },     /* IDSEL 11 - Winbond */
76                 {  0,  0,  0,  0 },     /* IDSEL 12 - unused */
77                 { 21, 22, 23, 24 },     /* IDSEL 13 - Universe II */
78                 { 18,  0,  0,  0 },     /* IDSEL 14 - Enet 1 */
79                 {  0,  0,  0,  0 },     /* IDSEL 15 - unused */
80                 { 25, 26, 27, 28 },     /* IDSEL 16 - PMC Slot 1 */
81                 { 28, 25, 26, 27 },     /* IDSEL 17 - PMC Slot 2 */
82                 {  0,  0,  0,  0 },     /* IDSEL 18 - unused */
83                 { 29,  0,  0,  0 },     /* IDSEL 19 - Enet 2 */
84                 {  0,  0,  0,  0 },     /* IDSEL 20 - PMCSPAN */
85         };
86
87         const long min_idsel = 11, max_idsel = 20, irqs_per_slot = 4;
88         irq = PCI_IRQ_TABLE_LOOKUP;
89         /* If lookup is zero, always return 0 */
90         if (!irq)
91                 return 0;
92         else
93 #ifdef CONFIG_MVME5100_IPMC761_PRESENT
94         /* If IPMC761 present, return table value */
95         return irq;
96 #else
97         /* If IPMC761 not present, we don't have an i8259 so adjust */
98         return (irq - NUM_8259_INTERRUPTS);
99 #endif
100 }
101
102 static void
103 mvme5100_pcibios_fixup_resources(struct pci_dev *dev)
104 {
105         int i;
106
107         if ((dev->vendor == PCI_VENDOR_ID_MOTOROLA) &&
108                         (dev->device == PCI_DEVICE_ID_MOTOROLA_HAWK))
109                 for (i=0; i<DEVICE_COUNT_RESOURCE; i++)
110                 {
111                         dev->resource[i].start = 0;
112                         dev->resource[i].end = 0;
113                 }
114 }
115
116 static void __init
117 mvme5100_setup_bridge(void)
118 {
119         struct pci_controller*  hose;
120
121         hose = pcibios_alloc_controller();
122
123         if (!hose)
124                 return;
125
126         hose->first_busno = 0;
127         hose->last_busno = 0xff;
128         hose->pci_mem_offset = MVME5100_PCI_MEM_OFFSET;
129
130         pci_init_resource(&hose->io_resource, MVME5100_PCI_LOWER_IO,
131                         MVME5100_PCI_UPPER_IO, IORESOURCE_IO,
132                         "PCI host bridge");
133
134         pci_init_resource(&hose->mem_resources[0], MVME5100_PCI_LOWER_MEM,
135                         MVME5100_PCI_UPPER_MEM, IORESOURCE_MEM,
136                         "PCI host bridge");
137
138         hose->io_space.start = MVME5100_PCI_LOWER_IO;
139         hose->io_space.end = MVME5100_PCI_UPPER_IO;
140         hose->mem_space.start = MVME5100_PCI_LOWER_MEM;
141         hose->mem_space.end = MVME5100_PCI_UPPER_MEM;
142         hose->io_base_virt = (void *)MVME5100_ISA_IO_BASE;
143
144         /* Use indirect method of Hawk */
145         setup_indirect_pci(hose, MVME5100_PCI_CONFIG_ADDR,
146                         MVME5100_PCI_CONFIG_DATA);
147
148         hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
149
150         ppc_md.pcibios_fixup_resources = mvme5100_pcibios_fixup_resources;
151         ppc_md.pci_swizzle = common_swizzle;
152         ppc_md.pci_map_irq = mvme5100_map_irq;
153 }
154
155 static void __init
156 mvme5100_setup_arch(void)
157 {
158         if ( ppc_md.progress )
159                 ppc_md.progress("mvme5100_setup_arch: enter", 0);
160
161         loops_per_jiffy = 50000000 / HZ;
162
163 #ifdef CONFIG_BLK_DEV_INITRD
164         if (initrd_start)
165                 ROOT_DEV = Root_RAM0;
166         else
167 #endif
168 #ifdef  CONFIG_ROOT_NFS
169                 ROOT_DEV = Root_NFS;
170 #else
171                 ROOT_DEV = Root_SDA2;
172 #endif
173
174         if ( ppc_md.progress )
175                 ppc_md.progress("mvme5100_setup_arch: find_bridges", 0);
176
177         /* Setup PCI host bridge */
178         mvme5100_setup_bridge();
179
180         /* Find and map our OpenPIC */
181         hawk_mpic_init(MVME5100_PCI_MEM_OFFSET);
182         OpenPIC_InitSenses = mvme5100_openpic_initsenses;
183         OpenPIC_NumInitSenses = sizeof(mvme5100_openpic_initsenses);
184
185         printk("MVME5100 port (C) 2001 MontaVista Software, Inc. (source@mvista.com)\n");
186
187         if ( ppc_md.progress )
188                 ppc_md.progress("mvme5100_setup_arch: exit", 0);
189
190         return;
191 }
192
193 static void __init
194 mvme5100_init2(void)
195 {
196 #ifdef CONFIG_MVME5100_IPMC761_PRESENT
197                 request_region(0x00,0x20,"dma1");
198                 request_region(0x20,0x20,"pic1");
199                 request_region(0x40,0x20,"timer");
200                 request_region(0x80,0x10,"dma page reg");
201                 request_region(0xa0,0x20,"pic2");
202                 request_region(0xc0,0x20,"dma2");
203 #endif
204         return;
205 }
206
207 /*
208  * Interrupt setup and service.
209  * Have MPIC on HAWK and cascaded 8259s on Winbond cascaded to MPIC.
210  */
211 static void __init
212 mvme5100_init_IRQ(void)
213 {
214 #ifdef CONFIG_MVME5100_IPMC761_PRESENT
215         int i;
216 #endif
217
218         if ( ppc_md.progress )
219                 ppc_md.progress("init_irq: enter", 0);
220
221         openpic_set_sources(0, 16, OpenPIC_Addr + 0x10000);
222 #ifdef CONFIG_MVME5100_IPMC761_PRESENT
223         openpic_init(NUM_8259_INTERRUPTS);
224         openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
225                         &i8259_irq);
226
227         /* Map i8259 interrupts. */
228         for (i = 0; i < NUM_8259_INTERRUPTS; i++)
229                 irq_desc[i].handler = &i8259_pic;
230
231         i8259_init(0);
232 #else
233         openpic_init(0);
234 #endif
235
236         if ( ppc_md.progress )
237                 ppc_md.progress("init_irq: exit", 0);
238
239         return;
240 }
241
242 /*
243  * Set BAT 3 to map 0xf0000000 to end of physical memory space.
244  */
245 static __inline__ void
246 mvme5100_set_bat(void)
247 {
248         mb();
249         mtspr(SPRN_DBAT1U, 0xf0001ffe);
250         mtspr(SPRN_DBAT1L, 0xf000002a);
251         mb();
252 }
253
254 static unsigned long __init
255 mvme5100_find_end_of_memory(void)
256 {
257         return hawk_get_mem_size(MVME5100_HAWK_SMC_BASE);
258 }
259
260 static void __init
261 mvme5100_map_io(void)
262 {
263         io_block_mapping(0xfe000000, 0xfe000000, 0x02000000, _PAGE_IO);
264         ioremap_base = 0xfe000000;
265 }
266
267 static void
268 mvme5100_reset_board(void)
269 {
270         local_irq_disable();
271
272         /* Set exception prefix high - to the firmware */
273         _nmask_and_or_msr(0, MSR_IP);
274
275         out_8((u_char *)MVME5100_BOARD_MODRST_REG, 0x01);
276
277         return;
278 }
279
280 static void
281 mvme5100_restart(char *cmd)
282 {
283         volatile ulong i = 10000000;
284
285         mvme5100_reset_board();
286
287         while (i-- > 0);
288         panic("restart failed\n");
289 }
290
291 static void
292 mvme5100_halt(void)
293 {
294         local_irq_disable();
295         while (1);
296 }
297
298 static void
299 mvme5100_power_off(void)
300 {
301         mvme5100_halt();
302 }
303
304 static int
305 mvme5100_show_cpuinfo(struct seq_file *m)
306 {
307         seq_printf(m, "vendor\t\t: Motorola\n");
308         seq_printf(m, "machine\t\t: MVME5100\n");
309
310         return 0;
311 }
312
313 TODC_ALLOC();
314
315 void __init
316 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
317               unsigned long r6, unsigned long r7)
318 {
319         parse_bootinfo(find_bootinfo());
320         mvme5100_set_bat();
321
322         isa_io_base = MVME5100_ISA_IO_BASE;
323         isa_mem_base = MVME5100_ISA_MEM_BASE;
324         pci_dram_offset = MVME5100_PCI_DRAM_OFFSET;
325
326         ppc_md.setup_arch = mvme5100_setup_arch;
327         ppc_md.show_cpuinfo = mvme5100_show_cpuinfo;
328         ppc_md.init_IRQ = mvme5100_init_IRQ;
329         ppc_md.get_irq = openpic_get_irq;
330         ppc_md.init = mvme5100_init2;
331
332         ppc_md.restart = mvme5100_restart;
333         ppc_md.power_off = mvme5100_power_off;
334         ppc_md.halt = mvme5100_halt;
335
336         ppc_md.find_end_of_memory = mvme5100_find_end_of_memory;
337         ppc_md.setup_io_mappings = mvme5100_map_io;
338
339         TODC_INIT(TODC_TYPE_MK48T37, MVME5100_NVRAM_AS0, MVME5100_NVRAM_AS1,
340                         MVME5100_NVRAM_DATA, 8);
341
342         ppc_md.time_init = todc_time_init;
343         ppc_md.set_rtc_time = todc_set_rtc_time;
344         ppc_md.get_rtc_time = todc_get_rtc_time;
345         ppc_md.calibrate_decr = todc_calibrate_decr;
346
347         ppc_md.nvram_read_val = todc_m48txx_read_val;
348         ppc_md.nvram_write_val = todc_m48txx_write_val;
349 }