2 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 * PCI Configuration space access support
30 #include <asm/immap.h>
32 #if defined(CONFIG_PCI)
33 /* System RAM mapped over PCI */
34 #define CFG_PCI_SYS_MEM_BUS CFG_SDRAM_BASE
35 #define CFG_PCI_SYS_MEM_PHYS CFG_SDRAM_BASE
36 #define CFG_PCI_SYS_MEM_SIZE (1024 * 1024 * 1024)
38 #define cfg_read(val, addr, type, op) *val = op((type)(addr));
39 #define cfg_write(val, addr, type, op) op((type *)(addr), (val));
41 #define PCI_OP(rw, size, type, op, mask) \
42 int pci_##rw##_cfg_##size(struct pci_controller *hose, \
43 pci_dev_t dev, int offset, type val) \
47 addr = ((offset & 0xfc) | cfg_type | (dev) | 0x80000000); \
48 out_be32(hose->cfg_addr, addr); \
49 __asm__ __volatile__("nop"); \
50 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
51 out_be32(hose->cfg_addr, addr & 0x7fffffff); \
52 __asm__ __volatile__("nop"); \
56 PCI_OP(read, byte, u8 *, in_8, 3)
57 PCI_OP(read, word, u16 *, in_le16, 2)
58 PCI_OP(write, byte, u8, out_8, 3)
59 PCI_OP(write, word, u16, out_le16, 2)
60 PCI_OP(write, dword, u32, out_le32, 0)
62 int pci_read_cfg_dword(struct pci_controller *hose, pci_dev_t dev,
63 int offset, u32 * val)
67 u32 mask = 2; /* word access */
68 /* Read lower 16 bits */
69 addr = ((offset & 0xfc) | (dev) | 0x80000000);
70 out_be32(hose->cfg_addr, addr);
71 __asm__ __volatile__("nop");
72 *val = (u32) in_le16((u16 *) (hose->cfg_data + (offset & mask)));
73 out_be32(hose->cfg_addr, addr & 0x7fffffff);
74 __asm__ __volatile__("nop");
76 /* Read upper 16 bits */
78 addr = ((offset & 0xfc) | 1 | (dev) | 0x80000000);
79 out_be32(hose->cfg_addr, addr);
80 __asm__ __volatile__("nop");
81 tmpv = (u32) in_le16((u16 *) (hose->cfg_data + (offset & mask)));
82 out_be32(hose->cfg_addr, addr & 0x7fffffff);
83 __asm__ __volatile__("nop");
85 /* combine results into dword value */
86 *val = (tmpv << 16) | *val;
91 void pci_mcf5445x_init(struct pci_controller *hose)
93 volatile pci_t *pci = (volatile pci_t *)MMAP_PCI;
94 volatile pciarb_t *pciarb = (volatile pciarb_t *)MMAP_PCIARB;
95 volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO;
98 pciarb->acr = 0x001f001f;
100 /* Set PCIGNT1, PCIREQ1, PCIREQ0/PCIGNTIN, PCIGNT0/PCIREQOUT,
103 GPIO_PAR_PCI_GNT3_GNT3 | GPIO_PAR_PCI_GNT2 | GPIO_PAR_PCI_GNT1 |
104 GPIO_PAR_PCI_GNT0 | GPIO_PAR_PCI_REQ3_REQ3 | GPIO_PAR_PCI_REQ2 |
105 GPIO_PAR_PCI_REQ1 | GPIO_PAR_PCI_REQ0;
107 pci->tcr1 |= PCI_TCR1_P;
109 /* Initiator windows */
110 pci->iw0btar = CFG_PCI_MEM_PHYS;
111 pci->iw1btar = CFG_PCI_IO_PHYS;
112 pci->iw2btar = CFG_PCI_CFG_PHYS;
115 PCI_IWCR_W0C_EN | PCI_IWCR_W1C_EN | PCI_IWCR_W1C_IO |
116 PCI_IWCR_W2C_EN | PCI_IWCR_W2C_IO;
118 /* Enable bus master and mem access */
119 pci->scr = PCI_SCR_MW | PCI_SCR_B | PCI_SCR_M;
121 /* Cache line size and master latency */
122 pci->cr1 = PCI_CR1_CLS(8) | PCI_CR1_LTMR(0xFF);
126 pci->bar0 = PCI_BAR_BAR0(CFG_PCI_BAR0);
127 pci->tbatr0 = CFG_PCI_TBATR0 | PCI_TBATR_EN;
128 barEn |= PCI_TCR1_B0E;
131 pci->bar1 = PCI_BAR_BAR1(CFG_PCI_BAR1);
132 pci->tbatr1 = CFG_PCI_TBATR1 | PCI_TBATR_EN;
133 barEn |= PCI_TCR1_B1E;
136 pci->bar2 = PCI_BAR_BAR2(CFG_PCI_BAR2);
137 pci->tbatr2 = CFG_PCI_TBATR2 | PCI_TBATR_EN;
138 barEn |= PCI_TCR1_B2E;
141 pci->bar3 = PCI_BAR_BAR3(CFG_PCI_BAR3);
142 pci->tbatr3 = CFG_PCI_TBATR3 | PCI_TBATR_EN;
143 barEn |= PCI_TCR1_B3E;
146 pci->bar4 = PCI_BAR_BAR4(CFG_PCI_BAR4);
147 pci->tbatr4 = CFG_PCI_TBATR4 | PCI_TBATR_EN;
148 barEn |= PCI_TCR1_B4E;
151 pci->bar5 = PCI_BAR_BAR5(CFG_PCI_BAR5);
152 pci->tbatr5 = CFG_PCI_TBATR5 | PCI_TBATR_EN;
153 barEn |= PCI_TCR1_B5E;
158 /* Deassert reset bit */
159 pci->gscr &= ~PCI_GSCR_PR;
162 /* Enable PCI bus master support */
163 hose->first_busno = 0;
164 hose->last_busno = 0xff;
166 pci_set_region(hose->regions + 0, CFG_PCI_MEM_BUS, CFG_PCI_MEM_PHYS,
167 CFG_PCI_MEM_SIZE, PCI_REGION_MEM);
169 pci_set_region(hose->regions + 1, CFG_PCI_IO_BUS, CFG_PCI_IO_PHYS,
170 CFG_PCI_IO_SIZE, PCI_REGION_IO);
172 pci_set_region(hose->regions + 2, CFG_PCI_SYS_MEM_BUS,
173 CFG_PCI_SYS_MEM_PHYS, CFG_PCI_SYS_MEM_SIZE,
174 PCI_REGION_MEM | PCI_REGION_MEMORY);
176 hose->region_count = 3;
178 hose->cfg_addr = &(pci->car);
179 hose->cfg_data = (volatile unsigned char *)CFG_PCI_CFG_BUS;
181 pci_set_ops(hose, pci_read_cfg_byte, pci_read_cfg_word,
182 pci_read_cfg_dword, pci_write_cfg_byte, pci_write_cfg_word,
183 pci_write_cfg_dword);
186 pci_register_hose(hose);
187 hose->last_busno = pci_hose_scan(hose);
189 #endif /* CONFIG_PCI */