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73b4390f RB |
1 | /* |
2 | * BRIEF MODULE DESCRIPTION | |
3 | * PCI initialization for IDT EB434 board | |
4 | * | |
5 | * Copyright 2004 IDT Inc. (rischelp@idt.com) | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2 of the License, or (at your | |
10 | * option) any later version. | |
11 | * | |
12 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
13 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
14 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN | |
15 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
16 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
17 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF | |
18 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
19 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
20 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
21 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License along | |
24 | * with this program; if not, write to the Free Software Foundation, Inc., | |
25 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
26 | */ | |
27 | ||
28 | #include <linux/types.h> | |
29 | #include <linux/pci.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/init.h> | |
32 | ||
33 | #include <asm/mach-rc32434/rc32434.h> | |
34 | #include <asm/mach-rc32434/pci.h> | |
35 | ||
36 | #define PCI_ACCESS_READ 0 | |
37 | #define PCI_ACCESS_WRITE 1 | |
38 | ||
39 | /* define an unsigned array for the PCI registers */ | |
40 | static unsigned int korina_cnfg_regs[25] = { | |
41 | KORINA_CNFG1, KORINA_CNFG2, KORINA_CNFG3, KORINA_CNFG4, | |
42 | KORINA_CNFG5, KORINA_CNFG6, KORINA_CNFG7, KORINA_CNFG8, | |
43 | KORINA_CNFG9, KORINA_CNFG10, KORINA_CNFG11, KORINA_CNFG12, | |
44 | KORINA_CNFG13, KORINA_CNFG14, KORINA_CNFG15, KORINA_CNFG16, | |
45 | KORINA_CNFG17, KORINA_CNFG18, KORINA_CNFG19, KORINA_CNFG20, | |
46 | KORINA_CNFG21, KORINA_CNFG22, KORINA_CNFG23, KORINA_CNFG24 | |
47 | }; | |
48 | static struct resource rc32434_res_pci_mem1; | |
49 | static struct resource rc32434_res_pci_mem2; | |
50 | ||
51 | static struct resource rc32434_res_pci_mem1 = { | |
52 | .name = "PCI MEM1", | |
53 | .start = 0x50000000, | |
54 | .end = 0x5FFFFFFF, | |
55 | .flags = IORESOURCE_MEM, | |
56 | .parent = &rc32434_res_pci_mem1, | |
57 | .sibling = NULL, | |
58 | .child = &rc32434_res_pci_mem2 | |
59 | }; | |
60 | ||
61 | static struct resource rc32434_res_pci_mem2 = { | |
62 | .name = "PCI Mem2", | |
63 | .start = 0x60000000, | |
64 | .end = 0x6FFFFFFF, | |
65 | .flags = IORESOURCE_MEM, | |
66 | .parent = &rc32434_res_pci_mem1, | |
67 | .sibling = NULL, | |
68 | .child = NULL | |
69 | }; | |
70 | ||
71 | static struct resource rc32434_res_pci_io1 = { | |
72 | .name = "PCI I/O1", | |
73 | .start = 0x18800000, | |
74 | .end = 0x188FFFFF, | |
75 | .flags = IORESOURCE_IO, | |
76 | }; | |
77 | ||
78 | extern struct pci_ops rc32434_pci_ops; | |
79 | ||
80 | #define PCI_MEM1_START PCI_ADDR_START | |
81 | #define PCI_MEM1_END (PCI_ADDR_START + CPUTOPCI_MEM_WIN - 1) | |
82 | #define PCI_MEM2_START (PCI_ADDR_START + CPUTOPCI_MEM_WIN) | |
83 | #define PCI_MEM2_END (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) - 1) | |
84 | #define PCI_IO1_START (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN)) | |
85 | #define PCI_IO1_END \ | |
86 | (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + CPUTOPCI_IO_WIN - 1) | |
87 | #define PCI_IO2_START \ | |
88 | (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + CPUTOPCI_IO_WIN) | |
89 | #define PCI_IO2_END \ | |
90 | (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + (2 * CPUTOPCI_IO_WIN) - 1) | |
91 | ||
92 | struct pci_controller rc32434_controller2; | |
93 | ||
94 | struct pci_controller rc32434_controller = { | |
95 | .pci_ops = &rc32434_pci_ops, | |
96 | .mem_resource = &rc32434_res_pci_mem1, | |
97 | .io_resource = &rc32434_res_pci_io1, | |
98 | .mem_offset = 0, | |
99 | .io_offset = 0, | |
100 | ||
101 | }; | |
102 | ||
103 | #ifdef __MIPSEB__ | |
104 | #define PCI_ENDIAN_FLAG PCILBAC_sb_m | |
105 | #else | |
106 | #define PCI_ENDIAN_FLAG 0 | |
107 | #endif | |
108 | ||
109 | static int __init rc32434_pcibridge_init(void) | |
110 | { | |
111 | unsigned int pcicvalue, pcicdata = 0; | |
112 | unsigned int dummyread, pcicntlval; | |
113 | int loopCount; | |
114 | unsigned int pci_config_addr; | |
115 | ||
116 | pcicvalue = rc32434_pci->pcic; | |
117 | pcicvalue = (pcicvalue >> PCIM_SHFT) & PCIM_BIT_LEN; | |
118 | if (!((pcicvalue == PCIM_H_EA) || | |
119 | (pcicvalue == PCIM_H_IA_FIX) || | |
120 | (pcicvalue == PCIM_H_IA_RR))) { | |
7dde29cb | 121 | pr_err("PCI init error!!!\n"); |
73b4390f RB |
122 | /* Not in Host Mode, return ERROR */ |
123 | return -1; | |
124 | } | |
125 | /* Enables the Idle Grant mode, Arbiter Parking */ | |
126 | pcicdata |= (PCI_CTL_IGM | PCI_CTL_EAP | PCI_CTL_EN); | |
127 | rc32434_pci->pcic = pcicdata; /* Enable the PCI bus Interface */ | |
128 | /* Zero out the PCI status & PCI Status Mask */ | |
129 | for (;;) { | |
130 | pcicdata = rc32434_pci->pcis; | |
131 | if (!(pcicdata & PCI_STAT_RIP)) | |
132 | break; | |
133 | } | |
134 | ||
135 | rc32434_pci->pcis = 0; | |
136 | rc32434_pci->pcism = 0xFFFFFFFF; | |
137 | /* Zero out the PCI decoupled registers */ | |
138 | rc32434_pci->pcidac = 0; /* | |
139 | * disable PCI decoupled accesses at | |
140 | * initialization | |
141 | */ | |
142 | rc32434_pci->pcidas = 0; /* clear the status */ | |
143 | rc32434_pci->pcidasm = 0x0000007F; /* Mask all the interrupts */ | |
144 | /* Mask PCI Messaging Interrupts */ | |
145 | rc32434_pci_msg->pciiic = 0; | |
146 | rc32434_pci_msg->pciiim = 0xFFFFFFFF; | |
147 | rc32434_pci_msg->pciioic = 0; | |
148 | rc32434_pci_msg->pciioim = 0; | |
149 | ||
150 | ||
151 | /* Setup PCILB0 as Memory Window */ | |
152 | rc32434_pci->pcilba[0].address = (unsigned int) (PCI_ADDR_START); | |
153 | ||
154 | /* setup the PCI map address as same as the local address */ | |
155 | ||
156 | rc32434_pci->pcilba[0].mapping = (unsigned int) (PCI_ADDR_START); | |
157 | ||
158 | ||
159 | /* Setup PCILBA1 as MEM */ | |
160 | rc32434_pci->pcilba[0].control = | |
161 | (((SIZE_256MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG); | |
162 | dummyread = rc32434_pci->pcilba[0].control; /* flush the CPU write Buffers */ | |
163 | rc32434_pci->pcilba[1].address = 0x60000000; | |
164 | rc32434_pci->pcilba[1].mapping = 0x60000000; | |
165 | ||
166 | /* setup PCILBA2 as IO Window */ | |
167 | rc32434_pci->pcilba[1].control = | |
168 | (((SIZE_256MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG); | |
169 | dummyread = rc32434_pci->pcilba[1].control; /* flush the CPU write Buffers */ | |
170 | rc32434_pci->pcilba[2].address = 0x18C00000; | |
171 | rc32434_pci->pcilba[2].mapping = 0x18FFFFFF; | |
172 | ||
173 | /* setup PCILBA2 as IO Window */ | |
174 | rc32434_pci->pcilba[2].control = | |
175 | (((SIZE_4MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG); | |
176 | dummyread = rc32434_pci->pcilba[2].control; /* flush the CPU write Buffers */ | |
177 | ||
178 | /* Setup PCILBA3 as IO Window */ | |
179 | rc32434_pci->pcilba[3].address = 0x18800000; | |
180 | rc32434_pci->pcilba[3].mapping = 0x18800000; | |
181 | rc32434_pci->pcilba[3].control = | |
182 | ((((SIZE_1MB & 0x1ff) << PCI_LBAC_SIZE_BIT) | PCI_LBAC_MSI) | | |
183 | PCI_ENDIAN_FLAG); | |
184 | dummyread = rc32434_pci->pcilba[3].control; /* flush the CPU write Buffers */ | |
185 | ||
186 | pci_config_addr = (unsigned int) (0x80000004); | |
187 | for (loopCount = 0; loopCount < 24; loopCount++) { | |
188 | rc32434_pci->pcicfga = pci_config_addr; | |
189 | dummyread = rc32434_pci->pcicfga; | |
190 | rc32434_pci->pcicfgd = korina_cnfg_regs[loopCount]; | |
191 | dummyread = rc32434_pci->pcicfgd; | |
192 | pci_config_addr += 4; | |
193 | } | |
194 | rc32434_pci->pcitc = | |
195 | (unsigned int) ((PCITC_RTIMER_VAL & 0xff) << PCI_TC_RTIMER_BIT) | | |
196 | ((PCITC_DTIMER_VAL & 0xff) << PCI_TC_DTIMER_BIT); | |
197 | ||
198 | pcicntlval = rc32434_pci->pcic; | |
199 | pcicntlval &= ~PCI_CTL_TNR; | |
200 | rc32434_pci->pcic = pcicntlval; | |
201 | pcicntlval = rc32434_pci->pcic; | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
206 | static int __init rc32434_pci_init(void) | |
207 | { | |
fb91e2cb PS |
208 | void __iomem *io_map_base; |
209 | ||
73b4390f RB |
210 | pr_info("PCI: Initializing PCI\n"); |
211 | ||
212 | ioport_resource.start = rc32434_res_pci_io1.start; | |
213 | ioport_resource.end = rc32434_res_pci_io1.end; | |
214 | ||
215 | rc32434_pcibridge_init(); | |
216 | ||
fb91e2cb | 217 | io_map_base = ioremap(rc32434_res_pci_io1.start, |
20ef5d3a | 218 | resource_size(&rc32434_res_pci_io1)); |
fb91e2cb PS |
219 | |
220 | if (!io_map_base) | |
221 | return -ENOMEM; | |
222 | ||
223 | rc32434_controller.io_map_base = | |
224 | (unsigned long)io_map_base - rc32434_res_pci_io1.start; | |
225 | ||
73b4390f RB |
226 | register_pci_controller(&rc32434_controller); |
227 | rc32434_sync(); | |
228 | ||
229 | return 0; | |
230 | } | |
231 | ||
232 | arch_initcall(rc32434_pci_init); |