2 * BRIEF MODULE DESCRIPTION
3 * PCI initialization for IDT EB434 board
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
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25 * 675 Mass Ave, Cambridge, MA 02139, USA.
28 #include <linux/types.h>
29 #include <linux/pci.h>
30 #include <linux/kernel.h>
31 #include <linux/init.h>
33 #include <asm/mach-rc32434/rc32434.h>
34 #include <asm/mach-rc32434/pci.h>
36 #define PCI_ACCESS_READ 0
37 #define PCI_ACCESS_WRITE 1
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
48 static struct resource rc32434_res_pci_mem1;
49 static struct resource rc32434_res_pci_mem2;
51 static struct resource rc32434_res_pci_mem1 = {
55 .flags = IORESOURCE_MEM,
57 .child = &rc32434_res_pci_mem2
60 static struct resource rc32434_res_pci_mem2 = {
64 .flags = IORESOURCE_MEM,
65 .parent = &rc32434_res_pci_mem1,
70 static struct resource rc32434_res_pci_io1 = {
74 .flags = IORESOURCE_IO,
77 extern struct pci_ops rc32434_pci_ops;
79 #define PCI_MEM1_START PCI_ADDR_START
80 #define PCI_MEM1_END (PCI_ADDR_START + CPUTOPCI_MEM_WIN - 1)
81 #define PCI_MEM2_START (PCI_ADDR_START + CPUTOPCI_MEM_WIN)
82 #define PCI_MEM2_END (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) - 1)
83 #define PCI_IO1_START (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN))
85 (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + CPUTOPCI_IO_WIN - 1)
86 #define PCI_IO2_START \
87 (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + CPUTOPCI_IO_WIN)
89 (PCI_ADDR_START + (2 * CPUTOPCI_MEM_WIN) + (2 * CPUTOPCI_IO_WIN) - 1)
91 struct pci_controller rc32434_controller2;
93 struct pci_controller rc32434_controller = {
94 .pci_ops = &rc32434_pci_ops,
95 .mem_resource = &rc32434_res_pci_mem1,
96 .io_resource = &rc32434_res_pci_io1,
103 #define PCI_ENDIAN_FLAG PCILBAC_sb_m
105 #define PCI_ENDIAN_FLAG 0
108 static int __init rc32434_pcibridge_init(void)
110 unsigned int pcicvalue, pcicdata = 0;
111 unsigned int dummyread, pcicntlval;
113 unsigned int pci_config_addr;
115 pcicvalue = rc32434_pci->pcic;
116 pcicvalue = (pcicvalue >> PCIM_SHFT) & PCIM_BIT_LEN;
117 if (!((pcicvalue == PCIM_H_EA) ||
118 (pcicvalue == PCIM_H_IA_FIX) ||
119 (pcicvalue == PCIM_H_IA_RR))) {
120 pr_err("PCI init error!!!\n");
121 /* Not in Host Mode, return ERROR */
124 /* Enables the Idle Grant mode, Arbiter Parking */
125 pcicdata |= (PCI_CTL_IGM | PCI_CTL_EAP | PCI_CTL_EN);
126 rc32434_pci->pcic = pcicdata; /* Enable the PCI bus Interface */
127 /* Zero out the PCI status & PCI Status Mask */
129 pcicdata = rc32434_pci->pcis;
130 if (!(pcicdata & PCI_STAT_RIP))
134 rc32434_pci->pcis = 0;
135 rc32434_pci->pcism = 0xFFFFFFFF;
136 /* Zero out the PCI decoupled registers */
137 rc32434_pci->pcidac = 0; /*
138 * disable PCI decoupled accesses at
141 rc32434_pci->pcidas = 0; /* clear the status */
142 rc32434_pci->pcidasm = 0x0000007F; /* Mask all the interrupts */
143 /* Mask PCI Messaging Interrupts */
144 rc32434_pci_msg->pciiic = 0;
145 rc32434_pci_msg->pciiim = 0xFFFFFFFF;
146 rc32434_pci_msg->pciioic = 0;
147 rc32434_pci_msg->pciioim = 0;
150 /* Setup PCILB0 as Memory Window */
151 rc32434_pci->pcilba[0].address = (unsigned int) (PCI_ADDR_START);
153 /* setup the PCI map address as same as the local address */
155 rc32434_pci->pcilba[0].mapping = (unsigned int) (PCI_ADDR_START);
158 /* Setup PCILBA1 as MEM */
159 rc32434_pci->pcilba[0].control =
160 (((SIZE_256MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG);
161 dummyread = rc32434_pci->pcilba[0].control; /* flush the CPU write Buffers */
162 rc32434_pci->pcilba[1].address = 0x60000000;
163 rc32434_pci->pcilba[1].mapping = 0x60000000;
165 /* setup PCILBA2 as IO Window */
166 rc32434_pci->pcilba[1].control =
167 (((SIZE_256MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG);
168 dummyread = rc32434_pci->pcilba[1].control; /* flush the CPU write Buffers */
169 rc32434_pci->pcilba[2].address = 0x18C00000;
170 rc32434_pci->pcilba[2].mapping = 0x18FFFFFF;
172 /* setup PCILBA2 as IO Window */
173 rc32434_pci->pcilba[2].control =
174 (((SIZE_4MB & 0x1f) << PCI_LBAC_SIZE_BIT) | PCI_ENDIAN_FLAG);
175 dummyread = rc32434_pci->pcilba[2].control; /* flush the CPU write Buffers */
177 /* Setup PCILBA3 as IO Window */
178 rc32434_pci->pcilba[3].address = 0x18800000;
179 rc32434_pci->pcilba[3].mapping = 0x18800000;
180 rc32434_pci->pcilba[3].control =
181 ((((SIZE_1MB & 0x1ff) << PCI_LBAC_SIZE_BIT) | PCI_LBAC_MSI) |
183 dummyread = rc32434_pci->pcilba[3].control; /* flush the CPU write Buffers */
185 pci_config_addr = (unsigned int) (0x80000004);
186 for (loopCount = 0; loopCount < 24; loopCount++) {
187 rc32434_pci->pcicfga = pci_config_addr;
188 dummyread = rc32434_pci->pcicfga;
189 rc32434_pci->pcicfgd = korina_cnfg_regs[loopCount];
190 dummyread = rc32434_pci->pcicfgd;
191 pci_config_addr += 4;
194 (unsigned int) ((PCITC_RTIMER_VAL & 0xff) << PCI_TC_RTIMER_BIT) |
195 ((PCITC_DTIMER_VAL & 0xff) << PCI_TC_DTIMER_BIT);
197 pcicntlval = rc32434_pci->pcic;
198 pcicntlval &= ~PCI_CTL_TNR;
199 rc32434_pci->pcic = pcicntlval;
200 pcicntlval = rc32434_pci->pcic;
205 static int __init rc32434_pci_init(void)
207 void __iomem *io_map_base;
209 pr_info("PCI: Initializing PCI\n");
211 ioport_resource.start = rc32434_res_pci_io1.start;
212 ioport_resource.end = rc32434_res_pci_io1.end;
214 rc32434_pcibridge_init();
216 io_map_base = ioremap(rc32434_res_pci_io1.start,
217 resource_size(&rc32434_res_pci_io1));
222 rc32434_controller.io_map_base =
223 (unsigned long)io_map_base - rc32434_res_pci_io1.start;
225 register_pci_controller(&rc32434_controller);
231 arch_initcall(rc32434_pci_init);