1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * ULI M1575 setup code - specific to Freescale boards
4 *
5 * Copyright 2007 Freescale Semiconductor Inc.
6 */
7
8#include <linux/stddef.h>
9#include <linux/kernel.h>
10#include <linux/pci.h>
11#include <linux/interrupt.h>
12#include <linux/mc146818rtc.h>
13#include <linux/of_irq.h>
14
15#include <asm/pci-bridge.h>
16#include <asm/ppc-pci.h>
17
18#include <sysdev/fsl_pci.h>
19
20#define ULI_PIRQA	0x08
21#define ULI_PIRQB	0x09
22#define ULI_PIRQC	0x0a
23#define ULI_PIRQD	0x0b
24#define ULI_PIRQE	0x0c
25#define ULI_PIRQF	0x0d
26#define ULI_PIRQG	0x0e
27
28#define ULI_8259_NONE	0x00
29#define ULI_8259_IRQ1	0x08
30#define ULI_8259_IRQ3	0x02
31#define ULI_8259_IRQ4	0x04
32#define ULI_8259_IRQ5	0x05
33#define ULI_8259_IRQ6	0x07
34#define ULI_8259_IRQ7	0x06
35#define ULI_8259_IRQ9	0x01
36#define ULI_8259_IRQ10	0x03
37#define ULI_8259_IRQ11	0x09
38#define ULI_8259_IRQ12	0x0b
39#define ULI_8259_IRQ14	0x0d
40#define ULI_8259_IRQ15	0x0f
41
42static u8 uli_pirq_to_irq[8] = {
43	ULI_8259_IRQ9,		/* PIRQA */
44	ULI_8259_IRQ10,		/* PIRQB */
45	ULI_8259_IRQ11,		/* PIRQC */
46	ULI_8259_IRQ12,		/* PIRQD */
47	ULI_8259_IRQ5,		/* PIRQE */
48	ULI_8259_IRQ6,		/* PIRQF */
49	ULI_8259_IRQ7,		/* PIRQG */
50	ULI_8259_NONE,		/* PIRQH */
51};
52
53static inline bool is_quirk_valid(void)
54{
55	return (machine_is(mpc86xx_hpcn) ||
56		machine_is(mpc8544_ds) ||
57		machine_is(p2020_ds) ||
58		machine_is(mpc8572_ds));
59}
60
61/* Bridge */
62static void early_uli5249(struct pci_dev *dev)
63{
64	unsigned char temp;
65
66	if (!is_quirk_valid())
67		return;
68
69	pci_write_config_word(dev, PCI_COMMAND, PCI_COMMAND_IO |
70		 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
71
72	/* read/write lock */
73	pci_read_config_byte(dev, 0x7c, &temp);
74	pci_write_config_byte(dev, 0x7c, 0x80);
75
76	/* set as P2P bridge */
77	pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01);
78	dev->class |= 0x1;
79
80	/* restore lock */
81	pci_write_config_byte(dev, 0x7c, temp);
82}
83
84
85static void quirk_uli1575(struct pci_dev *dev)
86{
87	int i;
88
89	if (!is_quirk_valid())
90		return;
91
92	/*
93	 * ULI1575 interrupts route setup
94	 */
95
96	/* ULI1575 IRQ mapping conf register maps PIRQx to IRQn */
97	for (i = 0; i < 4; i++) {
98		u8 val = uli_pirq_to_irq[i*2] | (uli_pirq_to_irq[i*2+1] << 4);
99		pci_write_config_byte(dev, 0x48 + i, val);
100	}
101
102	/* USB 1.1 OHCI controller 1: dev 28, func 0 - IRQ12 */
103	pci_write_config_byte(dev, 0x86, ULI_PIRQD);
104
105	/* USB 1.1 OHCI controller 2: dev 28, func 1 - IRQ9 */
106	pci_write_config_byte(dev, 0x87, ULI_PIRQA);
107
108	/* USB 1.1 OHCI controller 3: dev 28, func 2 - IRQ10 */
109	pci_write_config_byte(dev, 0x88, ULI_PIRQB);
110
111	/* Lan controller: dev 27, func 0 - IRQ6 */
112	pci_write_config_byte(dev, 0x89, ULI_PIRQF);
113
114	/* AC97 Audio controller: dev 29, func 0 - IRQ6 */
115	pci_write_config_byte(dev, 0x8a, ULI_PIRQF);
116
117	/* Modem controller: dev 29, func 1 - IRQ6 */
118	pci_write_config_byte(dev, 0x8b, ULI_PIRQF);
119
120	/* HD Audio controller: dev 29, func 2 - IRQ6 */
121	pci_write_config_byte(dev, 0x8c, ULI_PIRQF);
122
123	/* SATA controller: dev 31, func 1 - IRQ5 */
124	pci_write_config_byte(dev, 0x8d, ULI_PIRQE);
125
126	/* SMB interrupt: dev 30, func 1 - IRQ7 */
127	pci_write_config_byte(dev, 0x8e, ULI_PIRQG);
128
129	/* PMU ACPI SCI interrupt: dev 30, func 2 - IRQ7 */
130	pci_write_config_byte(dev, 0x8f, ULI_PIRQG);
131
132	/* USB 2.0 controller: dev 28, func 3 */
133	pci_write_config_byte(dev, 0x74, ULI_8259_IRQ11);
134
135	/* Primary PATA IDE IRQ: 14
136	 * Secondary PATA IDE IRQ: 15
137	 */
138	pci_write_config_byte(dev, 0x44, 0x30 | ULI_8259_IRQ14);
139	pci_write_config_byte(dev, 0x75, ULI_8259_IRQ15);
140}
141
142static void quirk_final_uli1575(struct pci_dev *dev)
143{
144	/* Set i8259 interrupt trigger
145	 * IRQ 3:  Level
146	 * IRQ 4:  Level
147	 * IRQ 5:  Level
148	 * IRQ 6:  Level
149	 * IRQ 7:  Level
150	 * IRQ 9:  Level
151	 * IRQ 10: Level
152	 * IRQ 11: Level
153	 * IRQ 12: Level
154	 * IRQ 14: Edge
155	 * IRQ 15: Edge
156	 */
157	if (!is_quirk_valid())
158		return;
159
160	outb(0xfa, 0x4d0);
161	outb(0x1e, 0x4d1);
162
163	/* setup RTC */
164	CMOS_WRITE(RTC_SET, RTC_CONTROL);
165	CMOS_WRITE(RTC_24H, RTC_CONTROL);
166
167	/* ensure month, date, and week alarm fields are ignored */
168	CMOS_WRITE(0, RTC_VALID);
169
170	outb_p(0x7c, 0x72);
171	outb_p(RTC_ALARM_DONT_CARE, 0x73);
172
173	outb_p(0x7d, 0x72);
174	outb_p(RTC_ALARM_DONT_CARE, 0x73);
175}
176
177/* SATA */
178static void quirk_uli5288(struct pci_dev *dev)
179{
180	unsigned char c;
181	unsigned int d;
182
183	if (!is_quirk_valid())
184		return;
185
186	/* read/write lock */
187	pci_read_config_byte(dev, 0x83, &c);
188	pci_write_config_byte(dev, 0x83, c|0x80);
189
190	pci_read_config_dword(dev, PCI_CLASS_REVISION, &d);
191	d = (d & 0xff) | (PCI_CLASS_STORAGE_SATA_AHCI << 8);
192	pci_write_config_dword(dev, PCI_CLASS_REVISION, d);
193
194	/* restore lock */
195	pci_write_config_byte(dev, 0x83, c);
196
197	/* disable emulated PATA mode enabled */
198	pci_read_config_byte(dev, 0x84, &c);
199	pci_write_config_byte(dev, 0x84, c & ~0x01);
200}
201
202/* PATA */
203static void quirk_uli5229(struct pci_dev *dev)
204{
205	unsigned short temp;
206
207	if (!is_quirk_valid())
208		return;
209
210	pci_write_config_word(dev, PCI_COMMAND, PCI_COMMAND_INTX_DISABLE |
211		PCI_COMMAND_MASTER | PCI_COMMAND_IO);
212
213	/* Enable Native IRQ 14/15 */
214	pci_read_config_word(dev, 0x4a, &temp);
215	pci_write_config_word(dev, 0x4a, temp | 0x1000);
216}
217
218/* We have to do a dummy read on the P2P for the RTC to work, WTF */
219static void quirk_final_uli5249(struct pci_dev *dev)
220{
221	int i;
222	u8 *dummy;
223	struct pci_bus *bus = dev->bus;
224	struct resource *res;
225	resource_size_t end = 0;
226
227	for (i = PCI_BRIDGE_RESOURCES; i < PCI_BRIDGE_RESOURCES+3; i++) {
228		unsigned long flags = pci_resource_flags(dev, i);
229		if ((flags & (IORESOURCE_MEM|IORESOURCE_PREFETCH)) == IORESOURCE_MEM)
230			end = pci_resource_end(dev, i);
231	}
232
233	pci_bus_for_each_resource(bus, res, i) {
234		if (res && res->flags & IORESOURCE_MEM) {
235			if (res->end == end)
236				dummy = ioremap(res->start, 0x4);
237			else
238				dummy = ioremap(res->end - 3, 0x4);
239			if (dummy) {
240				in_8(dummy);
241				iounmap(dummy);
242			}
243			break;
244		}
245	}
246}
247
248DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AL, 0x5249, early_uli5249);
249DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, quirk_uli1575);
250DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, quirk_uli5288);
251DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229);
252DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x5249, quirk_final_uli5249);
253DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x1575, quirk_final_uli1575);
254DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229);
255
256static void hpcd_quirk_uli1575(struct pci_dev *dev)
257{
258	u32 temp32;
259
260	if (!machine_is(mpc86xx_hpcd))
261		return;
262
263	/* Disable INTx */
264	pci_read_config_dword(dev, 0x48, &temp32);
265	pci_write_config_dword(dev, 0x48, (temp32 | 1<<26));
266
267	/* Enable sideband interrupt */
268	pci_read_config_dword(dev, 0x90, &temp32);
269	pci_write_config_dword(dev, 0x90, (temp32 | 1<<22));
270}
271
272static void hpcd_quirk_uli5288(struct pci_dev *dev)
273{
274	unsigned char c;
275
276	if (!machine_is(mpc86xx_hpcd))
277		return;
278
279	pci_read_config_byte(dev, 0x83, &c);
280	c |= 0x80;
281	pci_write_config_byte(dev, 0x83, c);
282
283	pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01);
284	pci_write_config_byte(dev, PCI_CLASS_DEVICE, 0x06);
285
286	pci_read_config_byte(dev, 0x83, &c);
287	c &= 0x7f;
288	pci_write_config_byte(dev, 0x83, c);
289}
290
291/*
292 * Since 8259PIC was disabled on the board, the IDE device can not
293 * use the legacy IRQ, we need to let the IDE device work under
294 * native mode and use the interrupt line like other PCI devices.
295 * IRQ14 is a sideband interrupt from IDE device to CPU and we use this
296 * as the interrupt for IDE device.
297 */
298static void hpcd_quirk_uli5229(struct pci_dev *dev)
299{
300	unsigned char c;
301
302	if (!machine_is(mpc86xx_hpcd))
303		return;
304
305	pci_read_config_byte(dev, 0x4b, &c);
306	c |= 0x10;
307	pci_write_config_byte(dev, 0x4b, c);
308}
309
310/*
311 * SATA interrupt pin bug fix
312 * There's a chip bug for 5288, The interrupt pin should be 2,
313 * not the read only value 1, So it use INTB#, not INTA# which
314 * actually used by the IDE device 5229.
315 * As of this bug, during the PCI initialization, 5288 read the
316 * irq of IDE device from the device tree, this function fix this
317 * bug by re-assigning a correct irq to 5288.
318 *
319 */
320static void hpcd_final_uli5288(struct pci_dev *dev)
321{
322	struct pci_controller *hose = pci_bus_to_host(dev->bus);
323	struct device_node *hosenode = hose ? hose->dn : NULL;
324	struct of_phandle_args oirq;
325	u32 laddr[3];
326
327	if (!machine_is(mpc86xx_hpcd))
328		return;
329
330	if (!hosenode)
331		return;
332
333	oirq.np = hosenode;
334	oirq.args[0] = 2;
335	oirq.args_count = 1;
336	laddr[0] = (hose->first_busno << 16) | (PCI_DEVFN(31, 0) << 8);
337	laddr[1] = laddr[2] = 0;
338	of_irq_parse_raw(laddr, &oirq);
339	dev->irq = irq_create_of_mapping(&oirq);
340}
341
342DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, hpcd_quirk_uli1575);
343DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, hpcd_quirk_uli5288);
344DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, hpcd_quirk_uli5229);
345DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x5288, hpcd_final_uli5288);
346
347static int uli_exclude_device(struct pci_controller *hose, u_char bus, u_char devfn)
348{
349	if (hose->dn == fsl_pci_primary && bus == (hose->first_busno + 2)) {
350		/* exclude Modem controller */
351		if ((PCI_SLOT(devfn) == 29) && (PCI_FUNC(devfn) == 1))
352			return PCIBIOS_DEVICE_NOT_FOUND;
353
354		/* exclude HD Audio controller */
355		if ((PCI_SLOT(devfn) == 29) && (PCI_FUNC(devfn) == 2))
356			return PCIBIOS_DEVICE_NOT_FOUND;
357	}
358
359	return PCIBIOS_SUCCESSFUL;
360}
361
362void __init uli_init(void)
363{
364	struct device_node *node;
365	struct device_node *pci_with_uli;
366
367	/* See if we have a ULI under the primary */
368
369	node = of_find_node_by_name(NULL, "uli1575");
370	while ((pci_with_uli = of_get_parent(node))) {
371		of_node_put(node);
372		node = pci_with_uli;
373
374		if (pci_with_uli == fsl_pci_primary) {
375			ppc_md.pci_exclude_device = uli_exclude_device;
376			break;
377		}
378	}
379}
380