2 * Support for SCC external PCI
4 * (C) Copyright 2004-2007 TOSHIBA CORPORATION
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include <linux/kernel.h>
24 #include <linux/threads.h>
25 #include <linux/pci.h>
26 #include <linux/init.h>
27 #include <linux/pci_regs.h>
28 #include <linux/bootmem.h>
33 #include <asm/pci-bridge.h>
34 #include <asm/ppc-pci.h>
36 #include "celleb_scc.h"
37 #include "celleb_pci.h"
39 #define MAX_PCI_DEVICES 32
40 #define MAX_PCI_FUNCTIONS 8
42 #define iob() __asm__ __volatile__("eieio; sync":::"memory")
44 static inline PCI_IO_ADDR celleb_epci_get_epci_base(
45 struct pci_controller *hose)
49 * Celleb epci uses cfg_addr as a base address for
50 * epci control registers.
53 return hose->cfg_addr;
56 static inline PCI_IO_ADDR celleb_epci_get_epci_cfg(
57 struct pci_controller *hose)
61 * Celleb epci uses cfg_data as a base address for
62 * configuration area for epci devices.
65 return hose->cfg_data;
68 static inline void clear_and_disable_master_abort_interrupt(
69 struct pci_controller *hose)
71 PCI_IO_ADDR epci_base;
73 epci_base = celleb_epci_get_epci_base(hose);
74 reg = epci_base + PCI_COMMAND;
75 out_be32(reg, in_be32(reg) | (PCI_STATUS_REC_MASTER_ABORT << 16));
78 static int celleb_epci_check_abort(struct pci_controller *hose,
82 PCI_IO_ADDR epci_base;
86 epci_base = celleb_epci_get_epci_base(hose);
88 reg = epci_base + PCI_COMMAND;
91 if (val & (PCI_STATUS_REC_MASTER_ABORT << 16)) {
93 (val & 0xffff) | (PCI_STATUS_REC_MASTER_ABORT << 16));
95 /* clear PCI Controller error, FRE, PMFE */
96 reg = epci_base + SCC_EPCI_STATUS;
97 out_be32(reg, SCC_EPCI_INT_PAI);
99 reg = epci_base + SCC_EPCI_VCSR;
100 val = in_be32(reg) & 0xffff;
101 val |= SCC_EPCI_VCSR_FRE;
104 reg = epci_base + SCC_EPCI_VISTAT;
105 out_be32(reg, SCC_EPCI_VISTAT_PMFE);
106 return PCIBIOS_DEVICE_NOT_FOUND;
109 return PCIBIOS_SUCCESSFUL;
112 static PCI_IO_ADDR celleb_epci_make_config_addr(struct pci_bus *bus,
113 struct pci_controller *hose, unsigned int devfn, int where)
117 if (bus != hose->bus)
118 addr = celleb_epci_get_epci_cfg(hose) +
119 (((bus->number & 0xff) << 16)
120 | ((devfn & 0xff) << 8)
124 addr = celleb_epci_get_epci_cfg(hose) +
125 (((devfn & 0xff) << 8) | (where & 0xff));
127 pr_debug("EPCI: config_addr = 0x%p\n", addr);
132 static int celleb_epci_read_config(struct pci_bus *bus,
133 unsigned int devfn, int where, int size, u32 *val)
135 PCI_IO_ADDR epci_base;
137 struct device_node *node;
138 struct pci_controller *hose;
140 /* allignment check */
141 BUG_ON(where % size);
143 node = (struct device_node *)bus->sysdata;
144 hose = pci_find_hose_for_OF_device(node);
146 if (!celleb_epci_get_epci_cfg(hose))
147 return PCIBIOS_DEVICE_NOT_FOUND;
149 if (bus->number == hose->first_busno && devfn == 0) {
150 /* EPCI controller self */
152 epci_base = celleb_epci_get_epci_base(hose);
153 addr = epci_base + where;
160 *val = in_be16(addr);
163 *val = in_be32(addr);
166 return PCIBIOS_DEVICE_NOT_FOUND;
171 clear_and_disable_master_abort_interrupt(hose);
172 addr = celleb_epci_make_config_addr(bus, hose, devfn, where);
179 *val = in_le16(addr);
182 *val = in_le32(addr);
185 return PCIBIOS_DEVICE_NOT_FOUND;
190 "addr=0x%p, devfn=0x%x, where=0x%x, size=0x%x, val=0x%x\n",
191 addr, devfn, where, size, *val);
193 return celleb_epci_check_abort(hose, NULL);
196 static int celleb_epci_write_config(struct pci_bus *bus,
197 unsigned int devfn, int where, int size, u32 val)
199 PCI_IO_ADDR epci_base;
201 struct device_node *node;
202 struct pci_controller *hose;
204 /* allignment check */
205 BUG_ON(where % size);
207 node = (struct device_node *)bus->sysdata;
208 hose = pci_find_hose_for_OF_device(node);
211 if (!celleb_epci_get_epci_cfg(hose))
212 return PCIBIOS_DEVICE_NOT_FOUND;
214 if (bus->number == hose->first_busno && devfn == 0) {
215 /* EPCI controller self */
217 epci_base = celleb_epci_get_epci_base(hose);
218 addr = epci_base + where;
231 return PCIBIOS_DEVICE_NOT_FOUND;
236 clear_and_disable_master_abort_interrupt(hose);
237 addr = celleb_epci_make_config_addr(bus, hose, devfn, where);
250 return PCIBIOS_DEVICE_NOT_FOUND;
254 return celleb_epci_check_abort(hose, addr);
257 struct pci_ops celleb_epci_ops = {
258 .read = celleb_epci_read_config,
259 .write = celleb_epci_write_config,
262 /* to be moved in FW */
263 static int __init celleb_epci_init(struct pci_controller *hose)
267 PCI_IO_ADDR epci_base;
270 epci_base = celleb_epci_get_epci_base(hose);
272 /* PCI core reset(Internal bus and PCI clock) */
273 reg = epci_base + SCC_EPCI_CKCTRL;
275 if (val == 0x00030101)
278 val &= ~(SCC_EPCI_CKCTRL_CRST0 | SCC_EPCI_CKCTRL_CRST1);
281 /* set PCI core clock */
283 val |= (SCC_EPCI_CKCTRL_OCLKEN | SCC_EPCI_CKCTRL_LCLKEN);
286 /* release PCI core reset (internal bus) */
288 val |= SCC_EPCI_CKCTRL_CRST0;
291 /* set PCI clock select */
292 reg = epci_base + SCC_EPCI_CLKRST;
294 val &= ~SCC_EPCI_CLKRST_CKS_MASK;
295 val |= SCC_EPCI_CLKRST_CKS_2;
299 reg = epci_base + SCC_EPCI_ABTSET;
300 out_be32(reg, 0x0f1f001f); /* temporary value */
303 reg = epci_base + SCC_EPCI_CLKRST;
305 val |= SCC_EPCI_CLKRST_BC;
308 /* PCI clock enable */
310 val |= SCC_EPCI_CLKRST_PCKEN;
313 /* release PCI core reset (all) */
314 reg = epci_base + SCC_EPCI_CKCTRL;
316 val |= (SCC_EPCI_CKCTRL_CRST0 | SCC_EPCI_CKCTRL_CRST1);
319 /* set base translation registers. (already set by Beat) */
321 /* set base address masks. (already set by Beat) */
324 /* release interrupt masks and clear all interrupts */
325 reg = epci_base + SCC_EPCI_INTSET;
326 out_be32(reg, 0x013f011f); /* all interrupts enable */
327 reg = epci_base + SCC_EPCI_VIENAB;
328 val = SCC_EPCI_VIENAB_PMPEE | SCC_EPCI_VIENAB_PMFEE;
330 reg = epci_base + SCC_EPCI_STATUS;
331 out_be32(reg, 0xffffffff);
332 reg = epci_base + SCC_EPCI_VISTAT;
333 out_be32(reg, 0xffffffff);
335 /* disable PCI->IB address translation */
336 reg = epci_base + SCC_EPCI_VCSR;
338 val &= ~(SCC_EPCI_VCSR_DR | SCC_EPCI_VCSR_AT);
341 /* set base addresses. (no need to set?) */
343 /* memory space, bus master enable */
344 reg = epci_base + PCI_COMMAND;
345 val = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
348 /* endian mode setup */
349 reg = epci_base + SCC_EPCI_ECMODE;
353 /* set control option */
354 reg = epci_base + SCC_EPCI_CNTOPT;
356 val |= SCC_EPCI_CNTOPT_O2PMB;
359 /* XXX: temporay: set registers for address conversion setup */
360 reg = epci_base + SCC_EPCI_CNF10_REG;
361 out_be32(reg, 0x80000008);
362 reg = epci_base + SCC_EPCI_CNF14_REG;
363 out_be32(reg, 0x40000008);
365 reg = epci_base + SCC_EPCI_BAM0;
366 out_be32(reg, 0x80000000);
367 reg = epci_base + SCC_EPCI_BAM1;
368 out_be32(reg, 0xe0000000);
370 reg = epci_base + SCC_EPCI_PVBAT;
371 out_be32(reg, 0x80000000);
374 /* release external PCI reset */
375 reg = epci_base + SCC_EPCI_CLKRST;
377 val |= SCC_EPCI_CLKRST_PCIRST;
384 static int __init celleb_setup_epci(struct device_node *node,
385 struct pci_controller *hose)
389 pr_debug("PCI: celleb_setup_epci()\n");
393 * Celleb epci uses cfg_addr and cfg_data member of
394 * pci_controller structure in irregular way.
396 * cfg_addr is used to map for control registers of
399 * cfg_data is used for configuration area of devices
400 * on Celleb epci buses.
403 if (of_address_to_resource(node, 0, &r))
405 hose->cfg_addr = ioremap(r.start, (r.end - r.start + 1));
408 pr_debug("EPCI: cfg_addr map 0x%016lx->0x%016lx + 0x%016lx\n",
409 r.start, (unsigned long)hose->cfg_addr, (r.end - r.start + 1));
411 if (of_address_to_resource(node, 2, &r))
413 hose->cfg_data = ioremap(r.start, (r.end - r.start + 1));
416 pr_debug("EPCI: cfg_data map 0x%016lx->0x%016lx + 0x%016lx\n",
417 r.start, (unsigned long)hose->cfg_data, (r.end - r.start + 1));
419 hose->ops = &celleb_epci_ops;
420 celleb_epci_init(hose);
426 iounmap(hose->cfg_addr);
429 iounmap(hose->cfg_data);
433 struct celleb_phb_spec celleb_epci_spec __initdata = {
434 .setup = celleb_setup_epci,
435 .ops = &spiderpci_ops,
436 .iowa_init = &spiderpci_iowa_init,
437 .iowa_data = (void *)0,