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)
24 #if defined(CONFIG_OF_LIBFDT)
26 #include <libfdt_env.h>
29 #include <asm/fsl_i2c.h>
31 DECLARE_GLOBAL_DATA_PTR;
33 #if defined(CONFIG_PCI)
34 #define PCI_FUNCTION_CONFIG 0x44
35 #define PCI_FUNCTION_CFG_LOCK 0x20
38 * Initialize PCI Devices, report devices found
40 #ifndef CONFIG_PCI_PNP
41 static struct pci_config_table pci_mpc83xxemds_config_table[] = {
43 PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
44 pci_cfgfunc_config_device,
47 PCI_COMMON_MEMORY | PCI_COMMAND_MASTER}
52 static struct pci_controller hose[] = {
54 #ifndef CONFIG_PCI_PNP
55 config_table:pci_mpc83xxemds_config_table,
60 /**********************************************************************
62 *********************************************************************/
63 void pci_init_board(void)
64 #ifdef CONFIG_PCISLAVE
67 volatile immap_t *immr;
68 volatile law83xx_t *pci_law;
69 volatile pot83xx_t *pci_pot;
70 volatile pcictrl83xx_t *pci_ctrl;
71 volatile pciconf83xx_t *pci_conf;
73 immr = (immap_t *) CFG_IMMR;
74 pci_law = immr->sysconf.pcilaw;
75 pci_pot = immr->ios.pot;
76 pci_ctrl = immr->pci_ctrl;
77 pci_conf = immr->pci_conf;
79 * Configure PCI Inbound Translation Windows
81 pci_ctrl[0].pitar0 = 0x0;
82 pci_ctrl[0].pibar0 = 0x0;
83 pci_ctrl[0].piwar0 = PIWAR_EN | PIWAR_RTT_SNOOP |
84 PIWAR_WTT_SNOOP | PIWAR_IWS_4K;
86 pci_ctrl[0].pitar1 = 0x0;
87 pci_ctrl[0].pibar1 = 0x0;
88 pci_ctrl[0].piebar1 = 0x0;
89 pci_ctrl[0].piwar1 &= ~PIWAR_EN;
91 pci_ctrl[0].pitar2 = 0x0;
92 pci_ctrl[0].pibar2 = 0x0;
93 pci_ctrl[0].piebar2 = 0x0;
94 pci_ctrl[0].piwar2 &= ~PIWAR_EN;
96 hose[0].first_busno = 0;
97 hose[0].last_busno = 0xff;
98 pci_setup_indirect(&hose[0],
99 (CFG_IMMR + 0x8300), (CFG_IMMR + 0x8304));
102 pci_hose_read_config_word(&hose[0], PCI_BDF(0, 0, 0),
103 PCI_COMMAND, ®16);
104 reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MEMORY;
105 pci_hose_write_config_word(&hose[0], PCI_BDF(0, 0, 0),
109 * Clear non-reserved bits in status register.
111 pci_hose_write_config_word(&hose[0], PCI_BDF(0, 0, 0),
113 pci_hose_write_config_byte(&hose[0], PCI_BDF(0, 0, 0),
114 PCI_LATENCY_TIMER, 0x80);
117 * Unlock configuration lock in PCI function configuration register.
119 pci_hose_read_config_word(&hose[0], PCI_BDF(0, 0, 0),
120 PCI_FUNCTION_CONFIG, ®16);
121 reg16 &= ~(PCI_FUNCTION_CFG_LOCK);
122 pci_hose_write_config_word(&hose[0], PCI_BDF(0, 0, 0),
123 PCI_FUNCTION_CONFIG, reg16);
125 printf("Enabled PCI 32bit Agent Mode\n");
129 volatile immap_t *immr;
130 volatile clk83xx_t *clk;
131 volatile law83xx_t *pci_law;
132 volatile pot83xx_t *pci_pot;
133 volatile pcictrl83xx_t *pci_ctrl;
134 volatile pciconf83xx_t *pci_conf;
136 u8 val8, orig_i2c_bus;
141 immr = (immap_t *) CFG_IMMR;
142 clk = (clk83xx_t *) & immr->clk;
143 pci_law = immr->sysconf.pcilaw;
144 pci_pot = immr->ios.pot;
145 pci_ctrl = immr->pci_ctrl;
146 pci_conf = immr->pci_conf;
148 * Configure PCI controller and PCI_CLK_OUTPUT both in 66M mode
153 clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2;
154 printf("PCI clock is 66MHz\n");
155 #elif defined(PCI_33M)
156 clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2 |
157 OCCR_PCICD0 | OCCR_PCICD1 | OCCR_PCICD2 | OCCR_PCICR;
158 printf("PCI clock is 33MHz\n");
160 clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2;
161 printf("PCI clock is 66MHz\n");
166 * Configure PCI Local Access Windows
168 pci_law[0].bar = CFG_PCI_MEM_PHYS & LAWBAR_BAR;
169 pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_512M;
171 pci_law[1].bar = CFG_PCI_IO_PHYS & LAWBAR_BAR;
172 pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_1M;
175 * Configure PCI Outbound Translation Windows
178 /* PCI mem space - prefetch */
179 pci_pot[0].potar = (CFG_PCI_MEM_BASE >> 12) & POTAR_TA_MASK;
180 pci_pot[0].pobar = (CFG_PCI_MEM_PHYS >> 12) & POBAR_BA_MASK;
182 POCMR_EN | POCMR_SE | (POCMR_CM_256M & POCMR_CM_MASK);
184 /* PCI mmio - non-prefetch mem space */
185 pci_pot[1].potar = (CFG_PCI_MMIO_BASE >> 12) & POTAR_TA_MASK;
186 pci_pot[1].pobar = (CFG_PCI_MMIO_PHYS >> 12) & POBAR_BA_MASK;
187 pci_pot[1].pocmr = POCMR_EN | (POCMR_CM_256M & POCMR_CM_MASK);
190 pci_pot[2].potar = (CFG_PCI_IO_BASE >> 12) & POTAR_TA_MASK;
191 pci_pot[2].pobar = (CFG_PCI_IO_PHYS >> 12) & POBAR_BA_MASK;
192 pci_pot[2].pocmr = POCMR_EN | POCMR_IO | (POCMR_CM_1M & POCMR_CM_MASK);
195 * Configure PCI Inbound Translation Windows
197 pci_ctrl[0].pitar1 = (CFG_PCI_SLV_MEM_LOCAL >> 12) & PITAR_TA_MASK;
198 pci_ctrl[0].pibar1 = (CFG_PCI_SLV_MEM_BUS >> 12) & PIBAR_MASK;
199 pci_ctrl[0].piebar1 = 0x0;
201 PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP |
205 * Assign PIB PMC slot to desired PCI bus
208 /* Switch temporarily to I2C bus #2 */
209 orig_i2c_bus = i2c_get_bus_num();
213 i2c_write(0x23, 0x6, 1, &val8, 1);
214 i2c_write(0x23, 0x7, 1, &val8, 1);
216 i2c_write(0x23, 0x2, 1, &val8, 1);
217 i2c_write(0x23, 0x3, 1, &val8, 1);
220 i2c_write(0x26, 0x6, 1, &val8, 1);
222 i2c_write(0x26, 0x7, 1, &val8, 1);
224 val8 = 0xf3; /*PMC1, PMC2, PMC3 slot to PCI bus */
225 i2c_write(0x26, 0x2, 1, &val8, 1);
227 i2c_write(0x26, 0x3, 1, &val8, 1);
230 i2c_write(0x27, 0x6, 1, &val8, 1);
231 i2c_write(0x27, 0x7, 1, &val8, 1);
233 i2c_write(0x27, 0x2, 1, &val8, 1);
235 i2c_write(0x27, 0x3, 1, &val8, 1);
238 /* Reset to original I2C bus */
239 i2c_set_bus_num(orig_i2c_bus);
242 * Release PCI RST Output signal
248 hose[0].first_busno = 0;
249 hose[0].last_busno = 0xff;
251 /* PCI memory prefetch space */
252 pci_set_region(hose[0].regions + 0,
255 CFG_PCI_MEM_SIZE, PCI_REGION_MEM | PCI_REGION_PREFETCH);
257 /* PCI memory space */
258 pci_set_region(hose[0].regions + 1,
260 CFG_PCI_MMIO_PHYS, CFG_PCI_MMIO_SIZE, PCI_REGION_MEM);
263 pci_set_region(hose[0].regions + 2,
265 CFG_PCI_IO_PHYS, CFG_PCI_IO_SIZE, PCI_REGION_IO);
267 /* System memory space */
268 pci_set_region(hose[0].regions + 3,
269 CFG_PCI_SLV_MEM_LOCAL,
271 CFG_PCI_SLV_MEM_SIZE,
272 PCI_REGION_MEM | PCI_REGION_MEMORY);
274 hose[0].region_count = 4;
276 pci_setup_indirect(&hose[0],
277 (CFG_IMMR + 0x8300), (CFG_IMMR + 0x8304));
279 pci_register_hose(hose);
282 * Write command register
285 dev = PCI_BDF(0, 0, 0);
286 pci_hose_read_config_word(&hose[0], dev, PCI_COMMAND, ®16);
287 reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
288 pci_hose_write_config_word(&hose[0], dev, PCI_COMMAND, reg16);
291 * Clear non-reserved bits in status register.
293 pci_hose_write_config_word(&hose[0], dev, PCI_STATUS, 0xffff);
294 pci_hose_write_config_byte(&hose[0], dev, PCI_LATENCY_TIMER, 0x80);
295 pci_hose_write_config_byte(&hose[0], dev, PCI_CACHE_LINE_SIZE, 0x08);
297 printf("PCI 32bit bus on PMC1 & PMC2 & PMC3\n");
302 hose->last_busno = pci_hose_scan(hose);
304 #endif /* CONFIG_PCISLAVE */
306 #if defined(CONFIG_OF_LIBFDT)
308 ft_pci_setup(void *blob, bd_t *bd)
314 nodeoffset = fdt_path_offset (fdt, "/" OF_SOC "/pci@8500");
315 if (nodeoffset >= 0) {
316 tmp[0] = cpu_to_be32(hose[0].first_busno);
317 tmp[1] = cpu_to_be32(hose[0].last_busno);
318 err = fdt_setprop(fdt, nodeoffset, "bus-range", tmp, sizeof(tmp));
321 #endif /* CONFIG_OF_LIBFDT */
322 #ifdef CONFIG_OF_FLAT_TREE
324 ft_pci_setup(void *blob, bd_t *bd)
329 p = (u32 *)ft_get_prop(blob, "/" OF_SOC "/pci@8500/bus-range", &len);
331 p[0] = hose[0].first_busno;
332 p[1] = hose[0].last_busno;
335 #endif /* CONFIG_OF_FLAT_TREE */
336 #endif /* CONFIG_PCI */