2 * Copyright (C) 2006 Freescale Semiconductor, Inc.
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
14 * PCI Configuration space access support for MPC83xx PCI Bridge
21 #if defined(CONFIG_OF_FLAT_TREE)
23 #elif defined(CONFIG_OF_LIBFDT)
27 #include <asm/fsl_i2c.h>
29 DECLARE_GLOBAL_DATA_PTR;
31 #if defined(CONFIG_PCI)
32 #define PCI_FUNCTION_CONFIG 0x44
33 #define PCI_FUNCTION_CFG_LOCK 0x20
36 * Initialize PCI Devices, report devices found
38 #ifndef CONFIG_PCI_PNP
39 static struct pci_config_table pci_mpc83xxemds_config_table[] = {
41 PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
42 pci_cfgfunc_config_device,
45 PCI_COMMON_MEMORY | PCI_COMMAND_MASTER}
50 static struct pci_controller hose[] = {
52 #ifndef CONFIG_PCI_PNP
53 config_table:pci_mpc83xxemds_config_table,
58 /**********************************************************************
60 *********************************************************************/
61 void pci_init_board(void)
62 #ifdef CONFIG_PCISLAVE
65 volatile immap_t *immr;
66 volatile law83xx_t *pci_law;
67 volatile pot83xx_t *pci_pot;
68 volatile pcictrl83xx_t *pci_ctrl;
69 volatile pciconf83xx_t *pci_conf;
71 immr = (immap_t *) CFG_IMMR;
72 pci_law = immr->sysconf.pcilaw;
73 pci_pot = immr->ios.pot;
74 pci_ctrl = immr->pci_ctrl;
75 pci_conf = immr->pci_conf;
77 * Configure PCI Inbound Translation Windows
79 pci_ctrl[0].pitar0 = 0x0;
80 pci_ctrl[0].pibar0 = 0x0;
81 pci_ctrl[0].piwar0 = PIWAR_EN | PIWAR_RTT_SNOOP |
82 PIWAR_WTT_SNOOP | PIWAR_IWS_4K;
84 pci_ctrl[0].pitar1 = 0x0;
85 pci_ctrl[0].pibar1 = 0x0;
86 pci_ctrl[0].piebar1 = 0x0;
87 pci_ctrl[0].piwar1 &= ~PIWAR_EN;
89 pci_ctrl[0].pitar2 = 0x0;
90 pci_ctrl[0].pibar2 = 0x0;
91 pci_ctrl[0].piebar2 = 0x0;
92 pci_ctrl[0].piwar2 &= ~PIWAR_EN;
94 hose[0].first_busno = 0;
95 hose[0].last_busno = 0xff;
96 pci_setup_indirect(&hose[0],
97 (CFG_IMMR + 0x8300), (CFG_IMMR + 0x8304));
100 pci_hose_read_config_word(&hose[0], PCI_BDF(0, 0, 0),
101 PCI_COMMAND, ®16);
102 reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MEMORY;
103 pci_hose_write_config_word(&hose[0], PCI_BDF(0, 0, 0),
107 * Clear non-reserved bits in status register.
109 pci_hose_write_config_word(&hose[0], PCI_BDF(0, 0, 0),
111 pci_hose_write_config_byte(&hose[0], PCI_BDF(0, 0, 0),
112 PCI_LATENCY_TIMER, 0x80);
115 * Unlock configuration lock in PCI function configuration register.
117 pci_hose_read_config_word(&hose[0], PCI_BDF(0, 0, 0),
118 PCI_FUNCTION_CONFIG, ®16);
119 reg16 &= ~(PCI_FUNCTION_CFG_LOCK);
120 pci_hose_write_config_word(&hose[0], PCI_BDF(0, 0, 0),
121 PCI_FUNCTION_CONFIG, reg16);
123 printf("Enabled PCI 32bit Agent Mode\n");
127 volatile immap_t *immr;
128 volatile clk83xx_t *clk;
129 volatile law83xx_t *pci_law;
130 volatile pot83xx_t *pci_pot;
131 volatile pcictrl83xx_t *pci_ctrl;
132 volatile pciconf83xx_t *pci_conf;
138 immr = (immap_t *) CFG_IMMR;
139 clk = (clk83xx_t *) & immr->clk;
140 pci_law = immr->sysconf.pcilaw;
141 pci_pot = immr->ios.pot;
142 pci_ctrl = immr->pci_ctrl;
143 pci_conf = immr->pci_conf;
145 * Configure PCI controller and PCI_CLK_OUTPUT both in 66M mode
150 clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2;
151 printf("PCI clock is 66MHz\n");
152 #elif defined(PCI_33M)
153 clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2 |
154 OCCR_PCICD0 | OCCR_PCICD1 | OCCR_PCICD2 | OCCR_PCICR;
155 printf("PCI clock is 33MHz\n");
157 clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2;
158 printf("PCI clock is 66MHz\n");
163 * Configure PCI Local Access Windows
165 pci_law[0].bar = CFG_PCI_MEM_PHYS & LAWBAR_BAR;
166 pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_512M;
168 pci_law[1].bar = CFG_PCI_IO_PHYS & LAWBAR_BAR;
169 pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_1M;
172 * Configure PCI Outbound Translation Windows
175 /* PCI mem space - prefetch */
176 pci_pot[0].potar = (CFG_PCI_MEM_BASE >> 12) & POTAR_TA_MASK;
177 pci_pot[0].pobar = (CFG_PCI_MEM_PHYS >> 12) & POBAR_BA_MASK;
179 POCMR_EN | POCMR_SE | (POCMR_CM_256M & POCMR_CM_MASK);
181 /* PCI mmio - non-prefetch mem space */
182 pci_pot[1].potar = (CFG_PCI_MMIO_BASE >> 12) & POTAR_TA_MASK;
183 pci_pot[1].pobar = (CFG_PCI_MMIO_PHYS >> 12) & POBAR_BA_MASK;
184 pci_pot[1].pocmr = POCMR_EN | (POCMR_CM_256M & POCMR_CM_MASK);
187 pci_pot[2].potar = (CFG_PCI_IO_BASE >> 12) & POTAR_TA_MASK;
188 pci_pot[2].pobar = (CFG_PCI_IO_PHYS >> 12) & POBAR_BA_MASK;
189 pci_pot[2].pocmr = POCMR_EN | POCMR_IO | (POCMR_CM_1M & POCMR_CM_MASK);
192 * Configure PCI Inbound Translation Windows
194 pci_ctrl[0].pitar1 = (CFG_PCI_SLV_MEM_LOCAL >> 12) & PITAR_TA_MASK;
195 pci_ctrl[0].pibar1 = (CFG_PCI_SLV_MEM_BUS >> 12) & PIBAR_MASK;
196 pci_ctrl[0].piebar1 = 0x0;
198 PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP |
202 * Release PCI RST Output signal
208 hose[0].first_busno = 0;
209 hose[0].last_busno = 0xff;
211 /* PCI memory prefetch space */
212 pci_set_region(hose[0].regions + 0,
215 CFG_PCI_MEM_SIZE, PCI_REGION_MEM | PCI_REGION_PREFETCH);
217 /* PCI memory space */
218 pci_set_region(hose[0].regions + 1,
220 CFG_PCI_MMIO_PHYS, CFG_PCI_MMIO_SIZE, PCI_REGION_MEM);
223 pci_set_region(hose[0].regions + 2,
225 CFG_PCI_IO_PHYS, CFG_PCI_IO_SIZE, PCI_REGION_IO);
227 /* System memory space */
228 pci_set_region(hose[0].regions + 3,
229 CFG_PCI_SLV_MEM_LOCAL,
231 CFG_PCI_SLV_MEM_SIZE,
232 PCI_REGION_MEM | PCI_REGION_MEMORY);
234 hose[0].region_count = 4;
236 pci_setup_indirect(&hose[0],
237 (CFG_IMMR + 0x8300), (CFG_IMMR + 0x8304));
239 pci_register_hose(hose);
242 * Write command register
245 dev = PCI_BDF(0, 0, 0);
246 pci_hose_read_config_word(&hose[0], dev, PCI_COMMAND, ®16);
247 reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
248 pci_hose_write_config_word(&hose[0], dev, PCI_COMMAND, reg16);
251 * Clear non-reserved bits in status register.
253 pci_hose_write_config_word(&hose[0], dev, PCI_STATUS, 0xffff);
254 pci_hose_write_config_byte(&hose[0], dev, PCI_LATENCY_TIMER, 0x80);
255 pci_hose_write_config_byte(&hose[0], dev, PCI_CACHE_LINE_SIZE, 0x08);
260 hose->last_busno = pci_hose_scan(hose);
262 #endif /* CONFIG_PCISLAVE */
264 #if defined(CONFIG_OF_LIBFDT)
266 ft_pci_setup(void *blob, bd_t *bd)
272 nodeoffset = fdt_find_node_by_path(blob, "/" OF_SOC "/pci@8500");
273 if (nodeoffset >= 0) {
274 tmp[0] = cpu_to_be32(hose[0].first_busno);
275 tmp[1] = cpu_to_be32(hose[0].last_busno);
276 err = fdt_setprop(blob, nodeoffset, "bus-range",
279 tmp[0] = cpu_to_be32(gd->pci_clk);
280 err = fdt_setprop(blob, nodeoffset, "clock-frequency",
281 tmp, sizeof(tmp[0]));
284 #elif defined(CONFIG_OF_FLAT_TREE)
286 ft_pci_setup(void *blob, bd_t *bd)
291 p = (u32 *)ft_get_prop(blob, "/" OF_SOC "/pci@8500/bus-range", &len);
293 p[0] = hose[0].first_busno;
294 p[1] = hose[0].last_busno;
297 #endif /* CONFIG_OF_FLAT_TREE */
298 #endif /* CONFIG_PCI */