1 /*
2  * Copyright (C) 2006-2009 Freescale Semiconductor, Inc.
3  *
4  * See file CREDITS for list of people who contributed to this
5  * project.
6  *
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.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20  * MA 02111-1307 USA
21  *
22  */
23 
24 #include <asm/mmu.h>
25 #include <asm/io.h>
26 #include <common.h>
27 #include <mpc83xx.h>
28 #include <pci.h>
29 #include <i2c.h>
30 #include <asm/fsl_i2c.h>
31 
32 DECLARE_GLOBAL_DATA_PTR;
33 
34 static struct pci_region pci1_regions[] = {
35 	{
36 		bus_start: CONFIG_SYS_PCI1_MEM_BASE,
37 		phys_start: CONFIG_SYS_PCI1_MEM_PHYS,
38 		size: CONFIG_SYS_PCI1_MEM_SIZE,
39 		flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
40 	},
41 	{
42 		bus_start: CONFIG_SYS_PCI1_IO_BASE,
43 		phys_start: CONFIG_SYS_PCI1_IO_PHYS,
44 		size: CONFIG_SYS_PCI1_IO_SIZE,
45 		flags: PCI_REGION_IO
46 	},
47 	{
48 		bus_start: CONFIG_SYS_PCI1_MMIO_BASE,
49 		phys_start: CONFIG_SYS_PCI1_MMIO_PHYS,
50 		size: CONFIG_SYS_PCI1_MMIO_SIZE,
51 		flags: PCI_REGION_MEM
52 	},
53 };
54 
55 #ifdef CONFIG_MPC83XX_PCI2
56 static struct pci_region pci2_regions[] = {
57 	{
58 		bus_start: CONFIG_SYS_PCI2_MEM_BASE,
59 		phys_start: CONFIG_SYS_PCI2_MEM_PHYS,
60 		size: CONFIG_SYS_PCI2_MEM_SIZE,
61 		flags: PCI_REGION_MEM | PCI_REGION_PREFETCH
62 	},
63 	{
64 		bus_start: CONFIG_SYS_PCI2_IO_BASE,
65 		phys_start: CONFIG_SYS_PCI2_IO_PHYS,
66 		size: CONFIG_SYS_PCI2_IO_SIZE,
67 		flags: PCI_REGION_IO
68 	},
69 	{
70 		bus_start: CONFIG_SYS_PCI2_MMIO_BASE,
71 		phys_start: CONFIG_SYS_PCI2_MMIO_PHYS,
72 		size: CONFIG_SYS_PCI2_MMIO_SIZE,
73 		flags: PCI_REGION_MEM
74 	},
75 };
76 #endif
77 
78 #ifndef CONFIG_PCISLAVE
79 void pib_init(void)
80 {
81 	u8 val8, orig_i2c_bus;
82 	/*
83 	 * Assign PIB PMC slot to desired PCI bus
84 	 */
85 	/* Switch temporarily to I2C bus #2 */
86 	orig_i2c_bus = i2c_get_bus_num();
87 	i2c_set_bus_num(1);
88 
89 	val8 = 0;
90 	i2c_write(0x23, 0x6, 1, &val8, 1);
91 	i2c_write(0x23, 0x7, 1, &val8, 1);
92 	val8 = 0xff;
93 	i2c_write(0x23, 0x2, 1, &val8, 1);
94 	i2c_write(0x23, 0x3, 1, &val8, 1);
95 
96 	val8 = 0;
97 	i2c_write(0x26, 0x6, 1, &val8, 1);
98 	val8 = 0x34;
99 	i2c_write(0x26, 0x7, 1, &val8, 1);
100 #if defined(PCI_64BIT)
101 	val8 = 0xf4;	/* PMC2:PCI1/64-bit */
102 #elif defined(PCI_ALL_PCI1)
103 	val8 = 0xf3;	/* PMC1:PCI1 PMC2:PCI1 PMC3:PCI1 */
104 #elif defined(PCI_ONE_PCI1)
105 	val8 = 0xf9;	/* PMC1:PCI1 PMC2:PCI2 PMC3:PCI2 */
106 #else
107 	val8 = 0xf5;	/* PMC1:PCI1 PMC2:PCI1 PMC3:PCI2 */
108 #endif
109 	i2c_write(0x26, 0x2, 1, &val8, 1);
110 	val8 = 0xff;
111 	i2c_write(0x26, 0x3, 1, &val8, 1);
112 	val8 = 0;
113 	i2c_write(0x27, 0x6, 1, &val8, 1);
114 	i2c_write(0x27, 0x7, 1, &val8, 1);
115 	val8 = 0xff;
116 	i2c_write(0x27, 0x2, 1, &val8, 1);
117 	val8 = 0xef;
118 	i2c_write(0x27, 0x3, 1, &val8, 1);
119 	asm("eieio");
120 
121 #if defined(PCI_64BIT)
122 	printf("PCI1: 64-bit on PMC2\n");
123 #elif defined(PCI_ALL_PCI1)
124 	printf("PCI1: 32-bit on PMC1, PMC2, PMC3\n");
125 #elif defined(PCI_ONE_PCI1)
126 	printf("PCI1: 32-bit on PMC1\n");
127 	printf("PCI2: 32-bit on PMC2, PMC3\n");
128 #else
129 	printf("PCI1: 32-bit on PMC1, PMC2\n");
130 	printf("PCI2: 32-bit on PMC3\n");
131 #endif
132 	/* Reset to original I2C bus */
133 	i2c_set_bus_num(orig_i2c_bus);
134 }
135 
136 void pci_init_board(void)
137 {
138 	volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
139 	volatile clk83xx_t *clk = (volatile clk83xx_t *)&immr->clk;
140 	volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
141 #ifndef CONFIG_MPC83XX_PCI2
142 	struct pci_region *reg[] = { pci1_regions };
143 #else
144 	struct pci_region *reg[] = { pci1_regions, pci2_regions };
145 #endif
146 
147 	/* initialize the PCA9555PW IO expander on the PIB board */
148 	pib_init();
149 
150 	/* Enable all 8 PCI_CLK_OUTPUTS */
151 	clk->occr = 0xff000000;
152 	udelay(2000);
153 
154 	/* Configure PCI Local Access Windows */
155 	pci_law[0].bar = CONFIG_SYS_PCI1_MEM_PHYS & LAWBAR_BAR;
156 	pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G;
157 
158 	pci_law[1].bar = CONFIG_SYS_PCI1_IO_PHYS & LAWBAR_BAR;
159 	pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_4M;
160 
161 	udelay(2000);
162 
163 #ifndef CONFIG_MPC83XX_PCI2
164 	mpc83xx_pci_init(1, reg, 0);
165 #else
166 	mpc83xx_pci_init(2, reg, 0);
167 #endif
168 }
169 
170 #else
171 void pci_init_board(void)
172 {
173 	volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
174 	volatile law83xx_t *pci_law = immr->sysconf.pcilaw;
175 	volatile pcictrl83xx_t *pci_ctrl = &immr->pci_ctrl[0];
176 	struct pci_region *reg[] = { pci1_regions };
177 
178 	/* Configure PCI Local Access Windows */
179 	pci_law[0].bar = CONFIG_SYS_PCI1_MEM_PHYS & LAWBAR_BAR;
180 	pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G;
181 
182 	pci_law[1].bar = CONFIG_SYS_PCI1_IO_PHYS & LAWBAR_BAR;
183 	pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_4M;
184 
185 	mpc83xx_pci_init(1, reg, 0);
186 
187 	/* Configure PCI Inbound Translation Windows (3 1MB windows) */
188 	pci_ctrl->pitar0 = 0x0;
189 	pci_ctrl->pibar0 = 0x0;
190 	pci_ctrl->piwar0 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP |
191 			   PIWAR_WTT_SNOOP | PIWAR_IWS_1M;
192 
193 	pci_ctrl->pitar1  = 0x0;
194 	pci_ctrl->pibar1  = 0x0;
195 	pci_ctrl->piebar1 = 0x0;
196 	pci_ctrl->piwar1  = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP |
197 			    PIWAR_WTT_SNOOP | PIWAR_IWS_1M;
198 
199 	pci_ctrl->pitar2  = 0x0;
200 	pci_ctrl->pibar2  = 0x0;
201 	pci_ctrl->piebar2 = 0x0;
202 	pci_ctrl->piwar2  = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP |
203 			    PIWAR_WTT_SNOOP | PIWAR_IWS_1M;
204 
205 	/* Unlock the configuration bit */
206 	mpc83xx_pcislave_unlock(0);
207 	printf("PCI:   Agent mode enabled\n");
208 }
209 #endif /* CONFIG_PCISLAVE */
210