Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
[linux-2.6] / arch / powerpc / platforms / fsl_uli1575.c
1 /*
2  * ULI M1575 setup code - specific to Freescale boards
3  *
4  * Copyright 2007 Freescale Semiconductor Inc.
5  *
6  * This program is free software; you can redistribute  it and/or modify it
7  * under  the terms of  the GNU General  Public License as published by the
8  * Free Software Foundation;  either version 2 of the  License, or (at your
9  * option) any later version.
10  */
11
12 #include <linux/stddef.h>
13 #include <linux/kernel.h>
14 #include <linux/pci.h>
15 #include <linux/interrupt.h>
16 #include <linux/mc146818rtc.h>
17
18 #include <asm/system.h>
19 #include <asm/pci-bridge.h>
20
21 #define ULI_PIRQA       0x08
22 #define ULI_PIRQB       0x09
23 #define ULI_PIRQC       0x0a
24 #define ULI_PIRQD       0x0b
25 #define ULI_PIRQE       0x0c
26 #define ULI_PIRQF       0x0d
27 #define ULI_PIRQG       0x0e
28
29 #define ULI_8259_NONE   0x00
30 #define ULI_8259_IRQ1   0x08
31 #define ULI_8259_IRQ3   0x02
32 #define ULI_8259_IRQ4   0x04
33 #define ULI_8259_IRQ5   0x05
34 #define ULI_8259_IRQ6   0x07
35 #define ULI_8259_IRQ7   0x06
36 #define ULI_8259_IRQ9   0x01
37 #define ULI_8259_IRQ10  0x03
38 #define ULI_8259_IRQ11  0x09
39 #define ULI_8259_IRQ12  0x0b
40 #define ULI_8259_IRQ14  0x0d
41 #define ULI_8259_IRQ15  0x0f
42
43 u8 uli_pirq_to_irq[8] = {
44         ULI_8259_IRQ9,          /* PIRQA */
45         ULI_8259_IRQ10,         /* PIRQB */
46         ULI_8259_IRQ11,         /* PIRQC */
47         ULI_8259_IRQ12,         /* PIRQD */
48         ULI_8259_IRQ5,          /* PIRQE */
49         ULI_8259_IRQ6,          /* PIRQF */
50         ULI_8259_IRQ7,          /* PIRQG */
51         ULI_8259_NONE,          /* PIRQH */
52 };
53
54 /* Bridge */
55 static void __devinit early_uli5249(struct pci_dev *dev)
56 {
57         unsigned char temp;
58
59         if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
60                         !machine_is(mpc8572_ds))
61                 return;
62
63         pci_write_config_word(dev, PCI_COMMAND, PCI_COMMAND_IO |
64                  PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
65
66         /* read/write lock */
67         pci_read_config_byte(dev, 0x7c, &temp);
68         pci_write_config_byte(dev, 0x7c, 0x80);
69
70         /* set as P2P bridge */
71         pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01);
72         dev->class |= 0x1;
73
74         /* restore lock */
75         pci_write_config_byte(dev, 0x7c, temp);
76 }
77
78
79 static void __devinit quirk_uli1575(struct pci_dev *dev)
80 {
81         int i;
82
83         if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
84                         !machine_is(mpc8572_ds))
85                 return;
86
87         /*
88          * ULI1575 interrupts route setup
89          */
90
91         /* ULI1575 IRQ mapping conf register maps PIRQx to IRQn */
92         for (i = 0; i < 4; i++) {
93                 u8 val = uli_pirq_to_irq[i*2] | (uli_pirq_to_irq[i*2+1] << 4);
94                 pci_write_config_byte(dev, 0x48 + i, val);
95         }
96
97         /* USB 1.1 OHCI controller 1: dev 28, func 0 - IRQ12 */
98         pci_write_config_byte(dev, 0x86, ULI_PIRQD);
99
100         /* USB 1.1 OHCI controller 2: dev 28, func 1 - IRQ9 */
101         pci_write_config_byte(dev, 0x87, ULI_PIRQA);
102
103         /* USB 1.1 OHCI controller 3: dev 28, func 2 - IRQ10 */
104         pci_write_config_byte(dev, 0x88, ULI_PIRQB);
105
106         /* Lan controller: dev 27, func 0 - IRQ6 */
107         pci_write_config_byte(dev, 0x89, ULI_PIRQF);
108
109         /* AC97 Audio controller: dev 29, func 0 - IRQ6 */
110         pci_write_config_byte(dev, 0x8a, ULI_PIRQF);
111
112         /* Modem controller: dev 29, func 1 - IRQ6 */
113         pci_write_config_byte(dev, 0x8b, ULI_PIRQF);
114
115         /* HD Audio controller: dev 29, func 2 - IRQ6 */
116         pci_write_config_byte(dev, 0x8c, ULI_PIRQF);
117
118         /* SATA controller: dev 31, func 1 - IRQ5 */
119         pci_write_config_byte(dev, 0x8d, ULI_PIRQE);
120
121         /* SMB interrupt: dev 30, func 1 - IRQ7 */
122         pci_write_config_byte(dev, 0x8e, ULI_PIRQG);
123
124         /* PMU ACPI SCI interrupt: dev 30, func 2 - IRQ7 */
125         pci_write_config_byte(dev, 0x8f, ULI_PIRQG);
126
127         /* USB 2.0 controller: dev 28, func 3 */
128         pci_write_config_byte(dev, 0x74, ULI_8259_IRQ11);
129
130         /* Primary PATA IDE IRQ: 14
131          * Secondary PATA IDE IRQ: 15
132          */
133         pci_write_config_byte(dev, 0x44, 0x30 | ULI_8259_IRQ14);
134         pci_write_config_byte(dev, 0x75, ULI_8259_IRQ15);
135 }
136
137 static void __devinit quirk_final_uli1575(struct pci_dev *dev)
138 {
139         /* Set i8259 interrupt trigger
140          * IRQ 3:  Level
141          * IRQ 4:  Level
142          * IRQ 5:  Level
143          * IRQ 6:  Level
144          * IRQ 7:  Level
145          * IRQ 9:  Level
146          * IRQ 10: Level
147          * IRQ 11: Level
148          * IRQ 12: Level
149          * IRQ 14: Edge
150          * IRQ 15: Edge
151          */
152         if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
153                         !machine_is(mpc8572_ds))
154                 return;
155
156         outb(0xfa, 0x4d0);
157         outb(0x1e, 0x4d1);
158
159         /* setup RTC */
160         CMOS_WRITE(RTC_SET, RTC_CONTROL);
161         CMOS_WRITE(RTC_24H, RTC_CONTROL);
162
163         /* ensure month, date, and week alarm fields are ignored */
164         CMOS_WRITE(0, RTC_VALID);
165
166         outb_p(0x7c, 0x72);
167         outb_p(RTC_ALARM_DONT_CARE, 0x73);
168
169         outb_p(0x7d, 0x72);
170         outb_p(RTC_ALARM_DONT_CARE, 0x73);
171 }
172
173 /* SATA */
174 static void __devinit quirk_uli5288(struct pci_dev *dev)
175 {
176         unsigned char c;
177         unsigned int d;
178
179         if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
180                         !machine_is(mpc8572_ds))
181                 return;
182
183         /* read/write lock */
184         pci_read_config_byte(dev, 0x83, &c);
185         pci_write_config_byte(dev, 0x83, c|0x80);
186
187         pci_read_config_dword(dev, PCI_CLASS_REVISION, &d);
188         d = (d & 0xff) | (PCI_CLASS_STORAGE_SATA_AHCI << 8);
189         pci_write_config_dword(dev, PCI_CLASS_REVISION, d);
190
191         /* restore lock */
192         pci_write_config_byte(dev, 0x83, c);
193
194         /* disable emulated PATA mode enabled */
195         pci_read_config_byte(dev, 0x84, &c);
196         pci_write_config_byte(dev, 0x84, c & ~0x01);
197 }
198
199 /* PATA */
200 static void __devinit quirk_uli5229(struct pci_dev *dev)
201 {
202         unsigned short temp;
203
204         if (!machine_is(mpc86xx_hpcn) && !machine_is(mpc8544_ds) &&
205                         !machine_is(mpc8572_ds))
206                 return;
207
208         pci_write_config_word(dev, PCI_COMMAND, PCI_COMMAND_INTX_DISABLE |
209                 PCI_COMMAND_MASTER | PCI_COMMAND_IO);
210
211         /* Enable Native IRQ 14/15 */
212         pci_read_config_word(dev, 0x4a, &temp);
213         pci_write_config_word(dev, 0x4a, temp | 0x1000);
214 }
215
216 /* We have to do a dummy read on the P2P for the RTC to work, WTF */
217 static void __devinit quirk_final_uli5249(struct pci_dev *dev)
218 {
219         int i;
220         u8 *dummy;
221         struct pci_bus *bus = dev->bus;
222         resource_size_t end = 0;
223
224         for (i = PCI_BRIDGE_RESOURCES; i < PCI_BRIDGE_RESOURCES+3; i++) {
225                 unsigned long flags = pci_resource_flags(dev, i);
226                 if ((flags & (IORESOURCE_MEM|IORESOURCE_PREFETCH)) == IORESOURCE_MEM)
227                         end = pci_resource_end(dev, i);
228         }
229
230         for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
231                 if ((bus->resource[i]) &&
232                         (bus->resource[i]->flags & IORESOURCE_MEM)) {
233                         if (bus->resource[i]->end == end)
234                                 dummy = ioremap(bus->resource[i]->start, 0x4);
235                         else
236                                 dummy = ioremap(bus->resource[i]->end - 3, 0x4);
237                         if (dummy) {
238                                 in_8(dummy);
239                                 iounmap(dummy);
240                         }
241                         break;
242                 }
243         }
244 }
245
246 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AL, 0x5249, early_uli5249);
247 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, quirk_uli1575);
248 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, quirk_uli5288);
249 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229);
250 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x5249, quirk_final_uli5249);
251 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x1575, quirk_final_uli1575);
252 DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229);
253
254 static void __devinit hpcd_quirk_uli1575(struct pci_dev *dev)
255 {
256         u32 temp32;
257
258         if (!machine_is(mpc86xx_hpcd))
259                 return;
260
261         /* Disable INTx */
262         pci_read_config_dword(dev, 0x48, &temp32);
263         pci_write_config_dword(dev, 0x48, (temp32 | 1<<26));
264
265         /* Enable sideband interrupt */
266         pci_read_config_dword(dev, 0x90, &temp32);
267         pci_write_config_dword(dev, 0x90, (temp32 | 1<<22));
268 }
269
270 static void __devinit hpcd_quirk_uli5288(struct pci_dev *dev)
271 {
272         unsigned char c;
273         unsigned short temp;
274
275         if (!machine_is(mpc86xx_hpcd))
276                 return;
277
278         /* Interrupt Disable, Needed when SATA disabled */
279         pci_read_config_word(dev, PCI_COMMAND, &temp);
280         temp |= 1<<10;
281         pci_write_config_word(dev, PCI_COMMAND, temp);
282
283         pci_read_config_byte(dev, 0x83, &c);
284         c |= 0x80;
285         pci_write_config_byte(dev, 0x83, c);
286
287         pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01);
288         pci_write_config_byte(dev, PCI_CLASS_DEVICE, 0x06);
289
290         pci_read_config_byte(dev, 0x83, &c);
291         c &= 0x7f;
292         pci_write_config_byte(dev, 0x83, c);
293 }
294
295 /*
296  * Since 8259PIC was disabled on the board, the IDE device can not
297  * use the legacy IRQ, we need to let the IDE device work under
298  * native mode and use the interrupt line like other PCI devices.
299  * IRQ14 is a sideband interrupt from IDE device to CPU and we use this
300  * as the interrupt for IDE device.
301  */
302 static void __devinit hpcd_quirk_uli5229(struct pci_dev *dev)
303 {
304         unsigned char c;
305
306         if (!machine_is(mpc86xx_hpcd))
307                 return;
308
309         pci_read_config_byte(dev, 0x4b, &c);
310         c |= 0x10;
311         pci_write_config_byte(dev, 0x4b, c);
312 }
313
314 /*
315  * SATA interrupt pin bug fix
316  * There's a chip bug for 5288, The interrupt pin should be 2,
317  * not the read only value 1, So it use INTB#, not INTA# which
318  * actually used by the IDE device 5229.
319  * As of this bug, during the PCI initialization, 5288 read the
320  * irq of IDE device from the device tree, this function fix this
321  * bug by re-assigning a correct irq to 5288.
322  *
323  */
324 static void __devinit hpcd_final_uli5288(struct pci_dev *dev)
325 {
326         struct pci_controller *hose = pci_bus_to_host(dev->bus);
327         struct device_node *hosenode = hose ? hose->dn : NULL;
328         struct of_irq oirq;
329         int virq, pin = 2;
330         u32 laddr[3];
331
332         if (!machine_is(mpc86xx_hpcd))
333                 return;
334
335         if (!hosenode)
336                 return;
337
338         laddr[0] = (hose->first_busno << 16) | (PCI_DEVFN(31, 0) << 8);
339         laddr[1] = laddr[2] = 0;
340         of_irq_map_raw(hosenode, &pin, 1, laddr, &oirq);
341         virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
342                                      oirq.size);
343         dev->irq = virq;
344 }
345
346 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, hpcd_quirk_uli1575);
347 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, hpcd_quirk_uli5288);
348 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, hpcd_quirk_uli5229);
349 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x5288, hpcd_final_uli5288);
350
351 int uli_exclude_device(struct pci_controller *hose,
352                         u_char bus, u_char devfn)
353 {
354         if (bus == (hose->first_busno + 2)) {
355                 /* exclude Modem controller */
356                 if ((PCI_SLOT(devfn) == 29) && (PCI_FUNC(devfn) == 1))
357                         return PCIBIOS_DEVICE_NOT_FOUND;
358
359                 /* exclude HD Audio controller */
360                 if ((PCI_SLOT(devfn) == 29) && (PCI_FUNC(devfn) == 2))
361                         return PCIBIOS_DEVICE_NOT_FOUND;
362         }
363
364         return PCIBIOS_SUCCESSFUL;
365 }