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-rw-r--r--arch/mips/txx9/generic/pci.c388
1 files changed, 388 insertions, 0 deletions
diff --git a/arch/mips/txx9/generic/pci.c b/arch/mips/txx9/generic/pci.c
new file mode 100644
index 000000000000..0b92d8c13208
--- /dev/null
+++ b/arch/mips/txx9/generic/pci.c
@@ -0,0 +1,388 @@
1/*
2 * linux/arch/mips/txx9/pci.c
3 *
4 * Based on linux/arch/mips/txx9/rbtx4927/setup.c,
5 * linux/arch/mips/txx9/rbtx4938/setup.c,
6 * and RBTX49xx patch from CELF patch archive.
7 *
8 * Copyright 2001-2005 MontaVista Software Inc.
9 * Copyright (C) 1996, 97, 2001, 04 Ralf Baechle (ralf@linux-mips.org)
10 * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
11 *
12 * This file is subject to the terms and conditions of the GNU General Public
13 * License. See the file "COPYING" in the main directory of this archive
14 * for more details.
15 */
16#include <linux/delay.h>
17#include <linux/jiffies.h>
18#include <linux/io.h>
19#include <asm/txx9/generic.h>
20#include <asm/txx9/pci.h>
21#ifdef CONFIG_TOSHIBA_FPCIB0
22#include <linux/interrupt.h>
23#include <asm/i8259.h>
24#include <asm/txx9/smsc_fdc37m81x.h>
25#endif
26
27static int __init
28early_read_config_word(struct pci_controller *hose,
29 int top_bus, int bus, int devfn, int offset, u16 *value)
30{
31 struct pci_dev fake_dev;
32 struct pci_bus fake_bus;
33
34 fake_dev.bus = &fake_bus;
35 fake_dev.sysdata = hose;
36 fake_dev.devfn = devfn;
37 fake_bus.number = bus;
38 fake_bus.sysdata = hose;
39 fake_bus.ops = hose->pci_ops;
40
41 if (bus != top_bus)
42 /* Fake a parent bus structure. */
43 fake_bus.parent = &fake_bus;
44 else
45 fake_bus.parent = NULL;
46
47 return pci_read_config_word(&fake_dev, offset, value);
48}
49
50int __init txx9_pci66_check(struct pci_controller *hose, int top_bus,
51 int current_bus)
52{
53 u32 pci_devfn;
54 unsigned short vid;
55 int cap66 = -1;
56 u16 stat;
57
58 /* It seems SLC90E66 needs some time after PCI reset... */
59 mdelay(80);
60
61 printk(KERN_INFO "PCI: Checking 66MHz capabilities...\n");
62
63 for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++) {
64 if (PCI_FUNC(pci_devfn))
65 continue;
66 if (early_read_config_word(hose, top_bus, current_bus,
67 pci_devfn, PCI_VENDOR_ID, &vid) !=
68 PCIBIOS_SUCCESSFUL)
69 continue;
70 if (vid == 0xffff)
71 continue;
72
73 /* check 66MHz capability */
74 if (cap66 < 0)
75 cap66 = 1;
76 if (cap66) {
77 early_read_config_word(hose, top_bus, current_bus,
78 pci_devfn, PCI_STATUS, &stat);
79 if (!(stat & PCI_STATUS_66MHZ)) {
80 printk(KERN_DEBUG
81 "PCI: %02x:%02x not 66MHz capable.\n",
82 current_bus, pci_devfn);
83 cap66 = 0;
84 break;
85 }
86 }
87 }
88 return cap66 > 0;
89}
90
91static struct resource primary_pci_mem_res[2] = {
92 { .name = "PCI MEM" },
93 { .name = "PCI MMIO" },
94};
95static struct resource primary_pci_io_res = { .name = "PCI IO" };
96struct pci_controller txx9_primary_pcic = {
97 .mem_resource = &primary_pci_mem_res[0],
98 .io_resource = &primary_pci_io_res,
99};
100
101#ifdef CONFIG_64BIT
102int txx9_pci_mem_high __initdata = 1;
103#else
104int txx9_pci_mem_high __initdata;
105#endif
106
107/*
108 * allocate pci_controller and resources.
109 * mem_base, io_base: physical addresss. 0 for auto assignment.
110 * mem_size and io_size means max size on auto assignment.
111 * pcic must be &txx9_primary_pcic or NULL.
112 */
113struct pci_controller *__init
114txx9_alloc_pci_controller(struct pci_controller *pcic,
115 unsigned long mem_base, unsigned long mem_size,
116 unsigned long io_base, unsigned long io_size)
117{
118 struct pcic {
119 struct pci_controller c;
120 struct resource r_mem[2];
121 struct resource r_io;
122 } *new = NULL;
123 int min_size = 0x10000;
124
125 if (!pcic) {
126 new = kzalloc(sizeof(*new), GFP_KERNEL);
127 if (!new)
128 return NULL;
129 new->r_mem[0].name = "PCI mem";
130 new->r_mem[1].name = "PCI mmio";
131 new->r_io.name = "PCI io";
132 new->c.mem_resource = new->r_mem;
133 new->c.io_resource = &new->r_io;
134 pcic = &new->c;
135 } else
136 BUG_ON(pcic != &txx9_primary_pcic);
137 pcic->io_resource->flags = IORESOURCE_IO;
138
139 /*
140 * for auto assignment, first search a (big) region for PCI
141 * MEM, then search a region for PCI IO.
142 */
143 if (mem_base) {
144 pcic->mem_resource[0].start = mem_base;
145 pcic->mem_resource[0].end = mem_base + mem_size - 1;
146 if (request_resource(&iomem_resource, &pcic->mem_resource[0]))
147 goto free_and_exit;
148 } else {
149 unsigned long min = 0, max = 0x20000000; /* low 512MB */
150 if (!mem_size) {
151 /* default size for auto assignment */
152 if (txx9_pci_mem_high)
153 mem_size = 0x20000000; /* mem:512M(max) */
154 else
155 mem_size = 0x08000000; /* mem:128M(max) */
156 }
157 if (txx9_pci_mem_high) {
158 min = 0x20000000;
159 max = 0xe0000000;
160 }
161 /* search free region for PCI MEM */
162 for (; mem_size >= min_size; mem_size /= 2) {
163 if (allocate_resource(&iomem_resource,
164 &pcic->mem_resource[0],
165 mem_size, min, max,
166 mem_size, NULL, NULL) == 0)
167 break;
168 }
169 if (mem_size < min_size)
170 goto free_and_exit;
171 }
172
173 pcic->mem_resource[1].flags = IORESOURCE_MEM | IORESOURCE_BUSY;
174 if (io_base) {
175 pcic->mem_resource[1].start = io_base;
176 pcic->mem_resource[1].end = io_base + io_size - 1;
177 if (request_resource(&iomem_resource, &pcic->mem_resource[1]))
178 goto release_and_exit;
179 } else {
180 if (!io_size)
181 /* default size for auto assignment */
182 io_size = 0x01000000; /* io:16M(max) */
183 /* search free region for PCI IO in low 512MB */
184 for (; io_size >= min_size; io_size /= 2) {
185 if (allocate_resource(&iomem_resource,
186 &pcic->mem_resource[1],
187 io_size, 0, 0x20000000,
188 io_size, NULL, NULL) == 0)
189 break;
190 }
191 if (io_size < min_size)
192 goto release_and_exit;
193 io_base = pcic->mem_resource[1].start;
194 }
195
196 pcic->mem_resource[0].flags = IORESOURCE_MEM;
197 if (pcic == &txx9_primary_pcic &&
198 mips_io_port_base == (unsigned long)-1) {
199 /* map ioport 0 to PCI I/O space address 0 */
200 set_io_port_base(IO_BASE + pcic->mem_resource[1].start);
201 pcic->io_resource->start = 0;
202 pcic->io_offset = 0; /* busaddr == ioaddr */
203 pcic->io_map_base = IO_BASE + pcic->mem_resource[1].start;
204 } else {
205 /* physaddr to ioaddr */
206 pcic->io_resource->start =
207 io_base - (mips_io_port_base - IO_BASE);
208 pcic->io_offset = io_base - (mips_io_port_base - IO_BASE);
209 pcic->io_map_base = mips_io_port_base;
210 }
211 pcic->io_resource->end = pcic->io_resource->start + io_size - 1;
212
213 pcic->mem_offset = 0; /* busaddr == physaddr */
214
215 printk(KERN_INFO "PCI: IO 0x%08llx-0x%08llx MEM 0x%08llx-0x%08llx\n",
216 (unsigned long long)pcic->mem_resource[1].start,
217 (unsigned long long)pcic->mem_resource[1].end,
218 (unsigned long long)pcic->mem_resource[0].start,
219 (unsigned long long)pcic->mem_resource[0].end);
220
221 /* register_pci_controller() will request MEM resource */
222 release_resource(&pcic->mem_resource[0]);
223 return pcic;
224 release_and_exit:
225 release_resource(&pcic->mem_resource[0]);
226 free_and_exit:
227 kfree(new);
228 printk(KERN_ERR "PCI: Failed to allocate resources.\n");
229 return NULL;
230}
231
232static int __init
233txx9_arch_pci_init(void)
234{
235 PCIBIOS_MIN_IO = 0x8000; /* reseve legacy I/O space */
236 return 0;
237}
238arch_initcall(txx9_arch_pci_init);
239
240/* IRQ/IDSEL mapping */
241int txx9_pci_option =
242#ifdef CONFIG_PICMG_PCI_BACKPLANE_DEFAULT
243 TXX9_PCI_OPT_PICMG |
244#endif
245 TXX9_PCI_OPT_CLK_AUTO;
246
247enum txx9_pci_err_action txx9_pci_err_action = TXX9_PCI_ERR_REPORT;
248
249#ifdef CONFIG_TOSHIBA_FPCIB0
250static irqreturn_t i8259_interrupt(int irq, void *dev_id)
251{
252 int isairq;
253
254 isairq = i8259_irq();
255 if (unlikely(isairq <= I8259A_IRQ_BASE))
256 return IRQ_NONE;
257 generic_handle_irq(isairq);
258 return IRQ_HANDLED;
259}
260
261static int __init
262txx9_i8259_irq_setup(int irq)
263{
264 int err;
265
266 init_i8259_irqs();
267 err = request_irq(irq, &i8259_interrupt, IRQF_DISABLED|IRQF_SHARED,
268 "cascade(i8259)", (void *)(long)irq);
269 if (!err)
270 printk(KERN_INFO "PCI-ISA bridge PIC (irq %d)\n", irq);
271 return err;
272}
273
274static void __init quirk_slc90e66_bridge(struct pci_dev *dev)
275{
276 int irq; /* PCI/ISA Bridge interrupt */
277 u8 reg_64;
278 u32 reg_b0;
279 u8 reg_e1;
280 irq = pcibios_map_irq(dev, PCI_SLOT(dev->devfn), 1); /* INTA */
281 if (!irq)
282 return;
283 txx9_i8259_irq_setup(irq);
284 pci_read_config_byte(dev, 0x64, &reg_64);
285 pci_read_config_dword(dev, 0xb0, &reg_b0);
286 pci_read_config_byte(dev, 0xe1, &reg_e1);
287 /* serial irq control */
288 reg_64 = 0xd0;
289 /* serial irq pin */
290 reg_b0 |= 0x00010000;
291 /* ide irq on isa14 */
292 reg_e1 &= 0xf0;
293 reg_e1 |= 0x0d;
294 pci_write_config_byte(dev, 0x64, reg_64);
295 pci_write_config_dword(dev, 0xb0, reg_b0);
296 pci_write_config_byte(dev, 0xe1, reg_e1);
297
298 smsc_fdc37m81x_init(0x3f0);
299 smsc_fdc37m81x_config_beg();
300 smsc_fdc37m81x_config_set(SMSC_FDC37M81X_DNUM,
301 SMSC_FDC37M81X_KBD);
302 smsc_fdc37m81x_config_set(SMSC_FDC37M81X_INT, 1);
303 smsc_fdc37m81x_config_set(SMSC_FDC37M81X_INT2, 12);
304 smsc_fdc37m81x_config_set(SMSC_FDC37M81X_ACTIVE,
305 1);
306 smsc_fdc37m81x_config_end();
307}
308
309static void quirk_slc90e66_ide(struct pci_dev *dev)
310{
311 unsigned char dat;
312 int regs[2] = {0x41, 0x43};
313 int i;
314
315 /* SMSC SLC90E66 IDE uses irq 14, 15 (default) */
316 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 14);
317 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &dat);
318 printk(KERN_INFO "PCI: %s: IRQ %02x", pci_name(dev), dat);
319 /* enable SMSC SLC90E66 IDE */
320 for (i = 0; i < ARRAY_SIZE(regs); i++) {
321 pci_read_config_byte(dev, regs[i], &dat);
322 pci_write_config_byte(dev, regs[i], dat | 0x80);
323 pci_read_config_byte(dev, regs[i], &dat);
324 printk(KERN_CONT " IDETIM%d %02x", i, dat);
325 }
326 pci_read_config_byte(dev, 0x5c, &dat);
327 /*
328 * !!! DO NOT REMOVE THIS COMMENT IT IS REQUIRED BY SMSC !!!
329 *
330 * This line of code is intended to provide the user with a work
331 * around solution to the anomalies cited in SMSC's anomaly sheet
332 * entitled, "SLC90E66 Functional Rev.J_0.1 Anomalies"".
333 *
334 * !!! DO NOT REMOVE THIS COMMENT IT IS REQUIRED BY SMSC !!!
335 */
336 dat |= 0x01;
337 pci_write_config_byte(dev, regs[i], dat);
338 pci_read_config_byte(dev, 0x5c, &dat);
339 printk(KERN_CONT " REG5C %02x", dat);
340 printk(KERN_CONT "\n");
341}
342#endif /* CONFIG_TOSHIBA_FPCIB0 */
343
344static void final_fixup(struct pci_dev *dev)
345{
346 unsigned char bist;
347
348 /* Do build-in self test */
349 if (pci_read_config_byte(dev, PCI_BIST, &bist) == PCIBIOS_SUCCESSFUL &&
350 (bist & PCI_BIST_CAPABLE)) {
351 unsigned long timeout;
352 pci_set_power_state(dev, PCI_D0);
353 printk(KERN_INFO "PCI: %s BIST...", pci_name(dev));
354 pci_write_config_byte(dev, PCI_BIST, PCI_BIST_START);
355 timeout = jiffies + HZ * 2; /* timeout after 2 sec */
356 do {
357 pci_read_config_byte(dev, PCI_BIST, &bist);
358 if (time_after(jiffies, timeout))
359 break;
360 } while (bist & PCI_BIST_START);
361 if (bist & (PCI_BIST_CODE_MASK | PCI_BIST_START))
362 printk(KERN_CONT "failed. (0x%x)\n", bist);
363 else
364 printk(KERN_CONT "OK.\n");
365 }
366}
367
368#ifdef CONFIG_TOSHIBA_FPCIB0
369#define PCI_DEVICE_ID_EFAR_SLC90E66_0 0x9460
370DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_0,
371 quirk_slc90e66_bridge);
372DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1,
373 quirk_slc90e66_ide);
374DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1,
375 quirk_slc90e66_ide);
376#endif
377DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, final_fixup);
378DECLARE_PCI_FIXUP_RESUME(PCI_ANY_ID, PCI_ANY_ID, final_fixup);
379
380int pcibios_plat_dev_init(struct pci_dev *dev)
381{
382 return 0;
383}
384
385int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
386{
387 return txx9_board_vec->pci_map_irq(dev, slot, pin);
388}
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-24 13:45:36 -0500