Merge branch 'upstream-fixes'
[linux-2.6] / arch / ppc / platforms / lopec.c
1 /*
2  * arch/ppc/platforms/lopec.c
3  *
4  * Setup routines for the Motorola LoPEC.
5  *
6  * Author: Dan Cox
7  * Maintainer: Tom Rini <trini@kernel.crashing.org>
8  *
9  * 2001-2004 (c) MontaVista, Software, Inc.  This file is licensed under
10  * the terms of the GNU General Public License version 2.  This program
11  * is licensed "as is" without any warranty of any kind, whether express
12  * or implied.
13  */
14
15 #include <linux/config.h>
16 #include <linux/types.h>
17 #include <linux/delay.h>
18 #include <linux/pci_ids.h>
19 #include <linux/ioport.h>
20 #include <linux/init.h>
21 #include <linux/ide.h>
22 #include <linux/seq_file.h>
23 #include <linux/initrd.h>
24 #include <linux/console.h>
25 #include <linux/root_dev.h>
26 #include <linux/pci.h>
27
28 #include <asm/machdep.h>
29 #include <asm/pci-bridge.h>
30 #include <asm/io.h>
31 #include <asm/open_pic.h>
32 #include <asm/i8259.h>
33 #include <asm/todc.h>
34 #include <asm/bootinfo.h>
35 #include <asm/mpc10x.h>
36 #include <asm/hw_irq.h>
37 #include <asm/prep_nvram.h>
38 #include <asm/kgdb.h>
39
40 /*
41  * Define all of the IRQ senses and polarities.  Taken from the
42  * LoPEC Programmer's Reference Guide.
43  */
44 static u_char lopec_openpic_initsenses[16] __initdata = {
45         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* IRQ 0 */
46         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 1 */
47         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* IRQ 2 */
48         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 3 */
49         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* IRQ 4 */
50         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* IRQ 5 */
51         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 6 */
52         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 7 */
53         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 8 */
54         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 9 */
55         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 10 */
56         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 11 */
57         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* IRQ 12 */
58         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* IRQ 13 */
59         (IRQ_SENSE_EDGE | IRQ_POLARITY_NEGATIVE),       /* IRQ 14 */
60         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE)       /* IRQ 15 */
61 };
62
63 static inline int __init
64 lopec_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
65 {
66         int irq;
67         static char pci_irq_table[][4] = {
68                 {16, 0, 0, 0}, /* ID 11 - Winbond */
69                 {22, 0, 0, 0}, /* ID 12 - SCSI */
70                 {0, 0, 0, 0}, /* ID 13 - nothing */
71                 {17, 0, 0, 0}, /* ID 14 - 82559 Ethernet */
72                 {27, 0, 0, 0}, /* ID 15 - USB */
73                 {23, 0, 0, 0}, /* ID 16 - PMC slot 1 */
74                 {24, 0, 0, 0}, /* ID 17 - PMC slot 2 */
75                 {25, 0, 0, 0}, /* ID 18 - PCI slot */
76                 {0, 0, 0, 0}, /* ID 19 - nothing */
77                 {0, 0, 0, 0}, /* ID 20 - nothing */
78                 {0, 0, 0, 0}, /* ID 21 - nothing */
79                 {0, 0, 0, 0}, /* ID 22 - nothing */
80                 {0, 0, 0, 0}, /* ID 23 - nothing */
81                 {0, 0, 0, 0}, /* ID 24 - PMC slot 1b */
82                 {0, 0, 0, 0}, /* ID 25 - nothing */
83                 {0, 0, 0, 0}  /* ID 26 - PMC Slot 2b */
84         };
85         const long min_idsel = 11, max_idsel = 26, irqs_per_slot = 4;
86
87         irq = PCI_IRQ_TABLE_LOOKUP;
88         if (!irq)
89                 return 0;
90
91         return irq;
92 }
93
94 static void __init
95 lopec_setup_winbond_83553(struct pci_controller *hose)
96 {
97         int devfn;
98
99         devfn = PCI_DEVFN(11,0);
100
101         /* IDE interrupt routing (primary 14, secondary 15) */
102         early_write_config_byte(hose, 0, devfn, 0x43, 0xef);
103         /* PCI interrupt routing */
104         early_write_config_word(hose, 0, devfn, 0x44, 0x0000);
105
106         /* ISA-PCI address decoder */
107         early_write_config_byte(hose, 0, devfn, 0x48, 0xf0);
108
109         /* RTC, kb, not used in PPC */
110         early_write_config_byte(hose, 0, devfn, 0x4d, 0x00);
111         early_write_config_byte(hose, 0, devfn, 0x4e, 0x04);
112         devfn = PCI_DEVFN(11, 1);
113         early_write_config_byte(hose, 0, devfn, 0x09, 0x8f);
114         early_write_config_dword(hose, 0, devfn, 0x40, 0x00ff0011);
115 }
116
117 static void __init
118 lopec_find_bridges(void)
119 {
120         struct pci_controller *hose;
121
122         hose = pcibios_alloc_controller();
123         if (!hose)
124                 return;
125
126         hose->first_busno = 0;
127         hose->last_busno = 0xff;
128
129         if (mpc10x_bridge_init(hose, MPC10X_MEM_MAP_B, MPC10X_MEM_MAP_B,
130                                 MPC10X_MAPB_EUMB_BASE) == 0) {
131
132                 hose->mem_resources[0].end = 0xffffffff;
133                 lopec_setup_winbond_83553(hose);
134                 hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
135                 ppc_md.pci_swizzle = common_swizzle;
136                 ppc_md.pci_map_irq = lopec_map_irq;
137         }
138 }
139
140 static int
141 lopec_show_cpuinfo(struct seq_file *m)
142 {
143         seq_printf(m, "machine\t\t: Motorola LoPEC\n");
144         return 0;
145 }
146
147 static void
148 lopec_restart(char *cmd)
149 {
150 #define LOPEC_SYSSTAT1 0xffe00000
151         /* force a hard reset, if possible */
152         unsigned char reg = *((unsigned char *) LOPEC_SYSSTAT1);
153         reg |= 0x80;
154         *((unsigned char *) LOPEC_SYSSTAT1) = reg;
155
156         local_irq_disable();
157         while(1);
158 #undef LOPEC_SYSSTAT1
159 }
160
161 static void
162 lopec_halt(void)
163 {
164         local_irq_disable();
165         while(1);
166 }
167
168 static void
169 lopec_power_off(void)
170 {
171         lopec_halt();
172 }
173
174 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
175 int lopec_ide_ports_known = 0;
176 static unsigned long lopec_ide_regbase[MAX_HWIFS];
177 static unsigned long lopec_ide_ctl_regbase[MAX_HWIFS];
178 static unsigned long lopec_idedma_regbase;
179
180 static void
181 lopec_ide_probe(void)
182 {
183         struct pci_dev *dev = pci_get_device(PCI_VENDOR_ID_WINBOND,
184                                               PCI_DEVICE_ID_WINBOND_82C105,
185                                               NULL);
186         lopec_ide_ports_known = 1;
187
188         if (dev) {
189                 lopec_ide_regbase[0] = dev->resource[0].start;
190                 lopec_ide_regbase[1] = dev->resource[2].start;
191                 lopec_ide_ctl_regbase[0] = dev->resource[1].start;
192                 lopec_ide_ctl_regbase[1] = dev->resource[3].start;
193                 lopec_idedma_regbase = dev->resource[4].start;
194                 pci_dev_put(dev);
195         }
196 }
197
198 static int
199 lopec_ide_default_irq(unsigned long base)
200 {
201         if (lopec_ide_ports_known == 0)
202                 lopec_ide_probe();
203
204         if (base == lopec_ide_regbase[0])
205                 return 14;
206         else if (base == lopec_ide_regbase[1])
207                 return 15;
208         else
209                 return 0;
210 }
211
212 static unsigned long
213 lopec_ide_default_io_base(int index)
214 {
215         if (lopec_ide_ports_known == 0)
216                 lopec_ide_probe();
217         return lopec_ide_regbase[index];
218 }
219
220 static void __init
221 lopec_ide_init_hwif_ports(hw_regs_t *hw, unsigned long data,
222                           unsigned long ctl, int *irq)
223 {
224         unsigned long reg = data;
225         uint alt_status_base;
226         int i;
227
228         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
229                 hw->io_ports[i] = reg++;
230
231         if (data == lopec_ide_regbase[0]) {
232                 alt_status_base = lopec_ide_ctl_regbase[0] + 2;
233                 hw->irq = 14;
234         } else if (data == lopec_ide_regbase[1]) {
235                 alt_status_base = lopec_ide_ctl_regbase[1] + 2;
236                 hw->irq = 15;
237         } else {
238                 alt_status_base = 0;
239                 hw->irq = 0;
240         }
241
242         if (ctl)
243                 hw->io_ports[IDE_CONTROL_OFFSET] = ctl;
244         else
245                 hw->io_ports[IDE_CONTROL_OFFSET] = alt_status_base;
246
247         if (irq != NULL)
248                 *irq = hw->irq;
249
250 }
251 #endif /* BLK_DEV_IDE */
252
253 static void __init
254 lopec_init_IRQ(void)
255 {
256         int i;
257
258         /*
259          * Provide the open_pic code with the correct table of interrupts.
260          */
261         OpenPIC_InitSenses = lopec_openpic_initsenses;
262         OpenPIC_NumInitSenses = sizeof(lopec_openpic_initsenses);
263
264         mpc10x_set_openpic();
265
266         /* We have a cascade on OpenPIC IRQ 0, Linux IRQ 16 */
267         openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
268                         &i8259_irq);
269
270         /*
271          * The EPIC allows for a read in the range of 0xFEF00000 ->
272          * 0xFEFFFFFF to generate a PCI interrupt-acknowledge transaction.
273          */
274         i8259_init(0xfef00000, 0);
275 }
276
277 static int __init
278 lopec_request_io(void)
279 {
280         outb(0x00, 0x4d0);
281         outb(0xc0, 0x4d1);
282
283         request_region(0x00, 0x20, "dma1");
284         request_region(0x20, 0x20, "pic1");
285         request_region(0x40, 0x20, "timer");
286         request_region(0x80, 0x10, "dma page reg");
287         request_region(0xa0, 0x20, "pic2");
288         request_region(0xc0, 0x20, "dma2");
289
290         return 0;
291 }
292
293 device_initcall(lopec_request_io);
294
295 static void __init
296 lopec_map_io(void)
297 {
298         io_block_mapping(0xf0000000, 0xf0000000, 0x10000000, _PAGE_IO);
299         io_block_mapping(0xb0000000, 0xb0000000, 0x10000000, _PAGE_IO);
300 }
301
302 /*
303  * Set BAT 3 to map 0xf8000000 to end of physical memory space 1-to-1.
304  */
305 static __inline__ void
306 lopec_set_bat(void)
307 {
308         mb();
309         mtspr(SPRN_DBAT1U, 0xf8000ffe);
310         mtspr(SPRN_DBAT1L, 0xf800002a);
311         mb();
312 }
313
314 TODC_ALLOC();
315
316 static void __init
317 lopec_setup_arch(void)
318 {
319
320         TODC_INIT(TODC_TYPE_MK48T37, 0, 0,
321                   ioremap(0xffe80000, 0x8000), 8);
322
323         loops_per_jiffy = 100000000/HZ;
324
325         lopec_find_bridges();
326
327 #ifdef CONFIG_BLK_DEV_INITRD
328         if (initrd_start)
329                 ROOT_DEV = Root_RAM0;
330         else
331 #elif defined(CONFIG_ROOT_NFS)
332                 ROOT_DEV = Root_NFS;
333 #elif defined(CONFIG_BLK_DEV_IDEDISK)
334                 ROOT_DEV = Root_HDA1;
335 #else
336                 ROOT_DEV = Root_SDA1;
337 #endif
338
339 #ifdef CONFIG_PPCBUG_NVRAM
340         /* Read in NVRAM data */
341         init_prep_nvram();
342
343         /* if no bootargs, look in NVRAM */
344         if ( cmd_line[0] == '\0' ) {
345                 char *bootargs;
346                  bootargs = prep_nvram_get_var("bootargs");
347                  if (bootargs != NULL) {
348                          strcpy(cmd_line, bootargs);
349                          /* again.. */
350                          strcpy(saved_command_line, cmd_line);
351                 }
352         }
353 #endif
354 }
355
356 void __init
357 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
358               unsigned long r6, unsigned long r7)
359 {
360         parse_bootinfo(find_bootinfo());
361         lopec_set_bat();
362
363         isa_io_base = MPC10X_MAPB_ISA_IO_BASE;
364         isa_mem_base = MPC10X_MAPB_ISA_MEM_BASE;
365         pci_dram_offset = MPC10X_MAPB_DRAM_OFFSET;
366         ISA_DMA_THRESHOLD = 0x00ffffff;
367         DMA_MODE_READ = 0x44;
368         DMA_MODE_WRITE = 0x48;
369         ppc_do_canonicalize_irqs = 1;
370
371         ppc_md.setup_arch = lopec_setup_arch;
372         ppc_md.show_cpuinfo = lopec_show_cpuinfo;
373         ppc_md.init_IRQ = lopec_init_IRQ;
374         ppc_md.get_irq = openpic_get_irq;
375
376         ppc_md.restart = lopec_restart;
377         ppc_md.power_off = lopec_power_off;
378         ppc_md.halt = lopec_halt;
379
380         ppc_md.setup_io_mappings = lopec_map_io;
381
382         ppc_md.time_init = todc_time_init;
383         ppc_md.set_rtc_time = todc_set_rtc_time;
384         ppc_md.get_rtc_time = todc_get_rtc_time;
385         ppc_md.calibrate_decr = todc_calibrate_decr;
386
387         ppc_md.nvram_read_val = todc_direct_read_val;
388         ppc_md.nvram_write_val = todc_direct_write_val;
389
390 #if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
391         ppc_ide_md.default_irq = lopec_ide_default_irq;
392         ppc_ide_md.default_io_base = lopec_ide_default_io_base;
393         ppc_ide_md.ide_init_hwif = lopec_ide_init_hwif_ports;
394 #endif
395 #ifdef CONFIG_SERIAL_TEXT_DEBUG
396         ppc_md.progress = gen550_progress;
397 #endif
398 }