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/machdep.h>
34 #include <asm/pci-bridge.h>
35 #include <asm/ppc-pci.h>
39 #include "interrupt.h"
41 #define MAX_PCI_DEVICES 32
42 #define MAX_PCI_FUNCTIONS 8
44 #define iob() __asm__ __volatile__("eieio; sync":::"memory")
47 #if 0 /* test code for epci dummy read */
48 static void celleb_epci_dummy_read(struct pci_dev *dev)
50 void __iomem *epci_base;
51 struct device_node *node;
52 struct pci_controller *hose;
55 node = (struct device_node *)dev->bus->sysdata;
56 hose = pci_find_hose_for_OF_device(node);
61 epci_base = hose->cfg_addr;
63 val = in_be32(epci_base + SCC_EPCI_WATRP);
70 static inline void clear_and_disable_master_abort_interrupt(
71 struct pci_controller *hose)
74 addr = hose->cfg_addr + PCI_COMMAND;
75 out_be32(addr, in_be32(addr) | (PCI_STATUS_REC_MASTER_ABORT << 16));
78 static int celleb_epci_check_abort(struct pci_controller *hose,
81 void __iomem *reg, *epci_base;
85 epci_base = hose->cfg_addr;
87 reg = epci_base + PCI_COMMAND;
90 if (val & (PCI_STATUS_REC_MASTER_ABORT << 16)) {
92 (val & 0xffff) | (PCI_STATUS_REC_MASTER_ABORT << 16));
94 /* clear PCI Controller error, FRE, PMFE */
95 reg = epci_base + SCC_EPCI_STATUS;
96 out_be32(reg, SCC_EPCI_INT_PAI);
98 reg = epci_base + SCC_EPCI_VCSR;
99 val = in_be32(reg) & 0xffff;
100 val |= SCC_EPCI_VCSR_FRE;
103 reg = epci_base + SCC_EPCI_VISTAT;
104 out_be32(reg, SCC_EPCI_VISTAT_PMFE);
105 return PCIBIOS_DEVICE_NOT_FOUND;
108 return PCIBIOS_SUCCESSFUL;
111 static void __iomem *celleb_epci_make_config_addr(struct pci_controller *hose,
112 unsigned int devfn, int where)
115 struct pci_bus *bus = hose->bus;
118 addr = hose->cfg_data +
119 (((bus->number & 0xff) << 16)
120 | ((devfn & 0xff) << 8)
124 addr = hose->cfg_data +
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)
136 struct device_node *node;
137 struct pci_controller *hose;
139 /* allignment check */
140 BUG_ON(where % size);
142 node = (struct device_node *)bus->sysdata;
143 hose = pci_find_hose_for_OF_device(node);
146 return PCIBIOS_DEVICE_NOT_FOUND;
148 if (bus->number == hose->first_busno && devfn == 0) {
149 /* EPCI controller self */
151 addr = hose->cfg_addr + where;
158 *val = in_be16(addr);
161 *val = in_be32(addr);
164 return PCIBIOS_DEVICE_NOT_FOUND;
169 clear_and_disable_master_abort_interrupt(hose);
170 addr = celleb_epci_make_config_addr(hose, devfn, where);
177 *val = in_le16(addr);
180 *val = in_le32(addr);
183 return PCIBIOS_DEVICE_NOT_FOUND;
188 "addr=0x%lx, devfn=0x%x, where=0x%x, size=0x%x, val=0x%x\n",
189 addr, devfn, where, size, *val);
191 return celleb_epci_check_abort(hose, NULL);
194 static int celleb_epci_write_config(struct pci_bus *bus,
195 unsigned int devfn, int where, int size, u32 val)
198 struct device_node *node;
199 struct pci_controller *hose;
201 /* allignment check */
202 BUG_ON(where % size);
204 node = (struct device_node *)bus->sysdata;
205 hose = pci_find_hose_for_OF_device(node);
208 return PCIBIOS_DEVICE_NOT_FOUND;
210 if (bus->number == hose->first_busno && devfn == 0) {
211 /* EPCI controller self */
213 addr = hose->cfg_addr + where;
226 return PCIBIOS_DEVICE_NOT_FOUND;
231 clear_and_disable_master_abort_interrupt(hose);
232 addr = celleb_epci_make_config_addr(hose, devfn, where);
245 return PCIBIOS_DEVICE_NOT_FOUND;
249 return celleb_epci_check_abort(hose, addr);
252 struct pci_ops celleb_epci_ops = {
253 celleb_epci_read_config,
254 celleb_epci_write_config,
257 /* to be moved in FW */
258 static int __devinit celleb_epci_init(struct pci_controller *hose)
261 void __iomem *reg, *epci_base;
264 epci_base = hose->cfg_addr;
266 /* PCI core reset(Internal bus and PCI clock) */
267 reg = epci_base + SCC_EPCI_CKCTRL;
269 if (val == 0x00030101)
272 val &= ~(SCC_EPCI_CKCTRL_CRST0 | SCC_EPCI_CKCTRL_CRST1);
275 /* set PCI core clock */
277 val |= (SCC_EPCI_CKCTRL_OCLKEN | SCC_EPCI_CKCTRL_LCLKEN);
280 /* release PCI core reset (internal bus) */
282 val |= SCC_EPCI_CKCTRL_CRST0;
285 /* set PCI clock select */
286 reg = epci_base + SCC_EPCI_CLKRST;
288 val &= ~SCC_EPCI_CLKRST_CKS_MASK;
289 val |= SCC_EPCI_CLKRST_CKS_2;
293 reg = epci_base + SCC_EPCI_ABTSET;
294 out_be32(reg, 0x0f1f001f); /* temporary value */
297 reg = epci_base + SCC_EPCI_CLKRST;
299 val |= SCC_EPCI_CLKRST_BC;
302 /* PCI clock enable */
304 val |= SCC_EPCI_CLKRST_PCKEN;
307 /* release PCI core reset (all) */
308 reg = epci_base + SCC_EPCI_CKCTRL;
310 val |= (SCC_EPCI_CKCTRL_CRST0 | SCC_EPCI_CKCTRL_CRST1);
313 /* set base translation registers. (already set by Beat) */
315 /* set base address masks. (already set by Beat) */
318 /* release interrupt masks and clear all interrupts */
319 reg = epci_base + SCC_EPCI_INTSET;
320 out_be32(reg, 0x013f011f); /* all interrupts enable */
321 reg = epci_base + SCC_EPCI_VIENAB;
322 val = SCC_EPCI_VIENAB_PMPEE | SCC_EPCI_VIENAB_PMFEE;
324 reg = epci_base + SCC_EPCI_STATUS;
325 out_be32(reg, 0xffffffff);
326 reg = epci_base + SCC_EPCI_VISTAT;
327 out_be32(reg, 0xffffffff);
329 /* disable PCI->IB address translation */
330 reg = epci_base + SCC_EPCI_VCSR;
332 val &= ~(SCC_EPCI_VCSR_DR | SCC_EPCI_VCSR_AT);
335 /* set base addresses. (no need to set?) */
337 /* memory space, bus master enable */
338 reg = epci_base + PCI_COMMAND;
339 val = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
342 /* endian mode setup */
343 reg = epci_base + SCC_EPCI_ECMODE;
347 /* set control option */
348 reg = epci_base + SCC_EPCI_CNTOPT;
350 val |= SCC_EPCI_CNTOPT_O2PMB;
353 /* XXX: temporay: set registers for address conversion setup */
354 reg = epci_base + SCC_EPCI_CNF10_REG;
355 out_be32(reg, 0x80000008);
356 reg = epci_base + SCC_EPCI_CNF14_REG;
357 out_be32(reg, 0x40000008);
359 reg = epci_base + SCC_EPCI_BAM0;
360 out_be32(reg, 0x80000000);
361 reg = epci_base + SCC_EPCI_BAM1;
362 out_be32(reg, 0xe0000000);
364 reg = epci_base + SCC_EPCI_PVBAT;
365 out_be32(reg, 0x80000000);
368 /* release external PCI reset */
369 reg = epci_base + SCC_EPCI_CLKRST;
371 val |= SCC_EPCI_CLKRST_PCIRST;
378 int __devinit celleb_setup_epci(struct device_node *node,
379 struct pci_controller *hose)
383 pr_debug("PCI: celleb_setup_epci()\n");
385 if (of_address_to_resource(node, 0, &r))
387 hose->cfg_addr = ioremap(r.start, (r.end - r.start + 1));
390 pr_debug("EPCI: cfg_addr map 0x%016lx->0x%016lx + 0x%016lx\n",
391 r.start, (unsigned long)hose->cfg_addr,
392 (r.end - r.start + 1));
394 if (of_address_to_resource(node, 2, &r))
396 hose->cfg_data = ioremap(r.start, (r.end - r.start + 1));
399 pr_debug("EPCI: cfg_data map 0x%016lx->0x%016lx + 0x%016lx\n",
400 r.start, (unsigned long)hose->cfg_data,
401 (r.end - r.start + 1));
403 celleb_epci_init(hose);