2 * Copyright (C) 2007-2009 Freescale Semiconductor, Inc.
3 * Copyright (C) 2008-2009 MontaVista Software, Inc.
5 * Authors: Tony Li <tony.li@freescale.com>
6 * Anton Vorontsov <avorontsov@ru.mvista.com>
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,
29 DECLARE_GLOBAL_DATA_PTR;
31 #define PCIE_MAX_BUSES 2
33 #ifdef CONFIG_83XX_GENERIC_PCIE_REGISTER_HOSES
35 static int mpc83xx_pcie_remap_cfg(struct pci_controller *hose, pci_dev_t dev)
37 int bus = PCI_BUS(dev) - hose->first_busno;
38 immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
39 pex83xx_t *pex = &immr->pciexp[bus];
40 struct pex_outbound_window *out_win = &pex->bridge.pex_outbound_win[0];
41 u8 devfn = PCI_DEV(dev) << 3 | PCI_FUNC(dev);
42 u32 dev_base = bus << 24 | devfn << 16;
44 if (hose->indirect_type == INDIRECT_TYPE_NO_PCIE_LINK)
47 * Workaround for the HW bug: for Type 0 configure transactions the
48 * PCI-E controller does not check the device number bits and just
49 * assumes that the device number bits are 0.
54 out_le32(&out_win->tarl, dev_base);
58 #define cfg_read(val, addr, type, op) \
59 do { *val = op((type)(addr)); } while (0)
60 #define cfg_write(val, addr, type, op) \
61 do { op((type *)(addr), (val)); } while (0)
63 #define PCIE_OP(rw, size, type, op) \
64 static int pcie_##rw##_config_##size(struct pci_controller *hose, \
65 pci_dev_t dev, int offset, \
70 ret = mpc83xx_pcie_remap_cfg(hose, dev); \
73 cfg_##rw(val, (void *)hose->cfg_addr + offset, type, op); \
77 PCIE_OP(read, byte, u8 *, in_8)
78 PCIE_OP(read, word, u16 *, in_le16)
79 PCIE_OP(read, dword, u32 *, in_le32)
80 PCIE_OP(write, byte, u8, out_8)
81 PCIE_OP(write, word, u16, out_le16)
82 PCIE_OP(write, dword, u32, out_le32)
84 static void mpc83xx_pcie_register_hose(int bus, struct pci_region *reg,
87 extern void disable_addr_trans(void); /* start.S */
88 static struct pci_controller pcie_hose[PCIE_MAX_BUSES];
89 struct pci_controller *hose = &pcie_hose[bus];
93 * There are no spare BATs to remap all PCI-E windows for U-Boot, so
94 * disable translations. In general, this is not great solution, and
95 * that's why we don't register PCI-E hoses by default.
99 for (i = 0; i < 2; i++, reg++) {
103 hose->regions[i] = *reg;
104 hose->region_count++;
107 i = hose->region_count++;
108 hose->regions[i].bus_start = 0;
109 hose->regions[i].phys_start = 0;
110 hose->regions[i].size = gd->ram_size;
111 hose->regions[i].flags = PCI_REGION_MEM | PCI_REGION_SYS_MEMORY;
113 i = hose->region_count++;
114 hose->regions[i].bus_start = CONFIG_SYS_IMMR;
115 hose->regions[i].phys_start = CONFIG_SYS_IMMR;
116 hose->regions[i].size = 0x100000;
117 hose->regions[i].flags = PCI_REGION_MEM | PCI_REGION_SYS_MEMORY;
119 hose->first_busno = pci_last_busno() + 1;
120 hose->last_busno = 0xff;
123 hose->cfg_addr = (unsigned int *)CONFIG_SYS_PCIE1_CFG_BASE;
125 hose->cfg_addr = (unsigned int *)CONFIG_SYS_PCIE2_CFG_BASE;
128 pcie_read_config_byte,
129 pcie_read_config_word,
130 pcie_read_config_dword,
131 pcie_write_config_byte,
132 pcie_write_config_word,
133 pcie_write_config_dword);
136 hose->indirect_type = INDIRECT_TYPE_NO_PCIE_LINK;
138 pci_register_hose(hose);
140 #ifdef CONFIG_PCI_SCAN_SHOW
141 printf("PCI: Bus Dev VenId DevId Class Int\n");
146 hose->last_busno = pci_hose_scan(hose);
151 static void mpc83xx_pcie_register_hose(int bus, struct pci_region *reg,
154 #endif /* CONFIG_83XX_GENERIC_PCIE_REGISTER_HOSES */
156 static void mpc83xx_pcie_init_bus(int bus, struct pci_region *reg)
158 immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
159 pex83xx_t *pex = &immr->pciexp[bus];
160 struct pex_outbound_window *out_win;
161 struct pex_inbound_window *in_win;
169 /* Enable pex csb bridge inbound & outbound transactions */
170 out_le32(&pex->bridge.pex_csb_ctrl,
171 in_le32(&pex->bridge.pex_csb_ctrl) | PEX_CSB_CTRL_OBPIOE |
172 PEX_CSB_CTRL_IBPIOE);
174 /* Enable bridge outbound */
175 out_le32(&pex->bridge.pex_csb_obctrl, PEX_CSB_OBCTRL_PIOE |
176 PEX_CSB_OBCTRL_MEMWE | PEX_CSB_OBCTRL_IOWE |
177 PEX_CSB_OBCTRL_CFGWE);
179 out_win = &pex->bridge.pex_outbound_win[0];
181 out_le32(&out_win->ar, PEX_OWAR_EN | PEX_OWAR_TYPE_CFG |
182 CONFIG_SYS_PCIE2_CFG_SIZE);
183 out_le32(&out_win->bar, CONFIG_SYS_PCIE2_CFG_BASE);
185 out_le32(&out_win->ar, PEX_OWAR_EN | PEX_OWAR_TYPE_CFG |
186 CONFIG_SYS_PCIE1_CFG_SIZE);
187 out_le32(&out_win->bar, CONFIG_SYS_PCIE1_CFG_BASE);
189 out_le32(&out_win->tarl, 0);
190 out_le32(&out_win->tarh, 0);
192 for (i = 0; i < 2; i++, reg++) {
198 out_win = &pex->bridge.pex_outbound_win[i + 1];
199 out_le32(&out_win->bar, reg->phys_start);
200 out_le32(&out_win->tarl, reg->bus_start);
201 out_le32(&out_win->tarh, 0);
202 ar = PEX_OWAR_EN | (reg->size & PEX_OWAR_SIZE);
203 if (reg->flags & PCI_REGION_IO)
204 ar |= PEX_OWAR_TYPE_IO;
206 ar |= PEX_OWAR_TYPE_MEM;
207 out_le32(&out_win->ar, ar);
210 out_le32(&pex->bridge.pex_csb_ibctrl, PEX_CSB_IBCTRL_PIOE);
212 ram_sz = gd->ram_size;
217 in_win = &pex->bridge.pex_inbound_win[i];
218 out_le32(&in_win->barl, barl);
219 out_le32(&in_win->barh, 0x0);
220 out_le32(&in_win->tar, tar);
221 if (ram_sz >= 0x10000000) {
222 /* The maxium windows size is 256M */
223 out_le32(&in_win->ar, PEX_IWAR_EN | PEX_IWAR_NSOV |
224 PEX_IWAR_TYPE_PF | 0x0FFFF000);
227 ram_sz -= 0x10000000;
229 /* The UM is not clear here.
230 * So, round up to even Mb boundary */
232 ram_sz = ram_sz >> (20 +
233 ((ram_sz & 0xFFFFF) ? 1 : 0));
236 out_le32(&in_win->ar, PEX_IWAR_EN | PEX_IWAR_NSOV |
237 PEX_IWAR_TYPE_PF | (ram_sz << 20) | 0xFF000);
243 in_win = &pex->bridge.pex_inbound_win[i];
244 out_le32(&in_win->barl, CONFIG_SYS_IMMR);
245 out_le32(&in_win->barh, 0);
246 out_le32(&in_win->tar, CONFIG_SYS_IMMR);
247 out_le32(&in_win->ar, PEX_IWAR_EN |
248 PEX_IWAR_TYPE_NO_PF | PEX_IWAR_SIZE_1M);
250 /* Enable the host virtual INTX interrupts */
251 out_le32(&pex->bridge.pex_int_axi_misc_enb,
252 in_le32(&pex->bridge.pex_int_axi_misc_enb) | 0x1E0);
254 /* Hose configure header is memory-mapped */
255 hose_cfg_base = (void *)pex;
258 /* Configure the PCIE controller core clock ratio */
259 out_le32(hose_cfg_base + PEX_GCLK_RATIO,
260 (((bus ? gd->pciexp2_clk : gd->pciexp1_clk) / 1000000) * 16)
264 /* Do Type 1 bridge configuration */
265 out_8(hose_cfg_base + PCI_PRIMARY_BUS, 0);
266 out_8(hose_cfg_base + PCI_SECONDARY_BUS, 1);
267 out_8(hose_cfg_base + PCI_SUBORDINATE_BUS, 255);
270 * Write to Command register
272 reg16 = in_le16(hose_cfg_base + PCI_COMMAND);
273 reg16 |= PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY | PCI_COMMAND_IO |
274 PCI_COMMAND_SERR | PCI_COMMAND_PARITY;
275 out_le16(hose_cfg_base + PCI_COMMAND, reg16);
278 * Clear non-reserved bits in status register.
280 out_le16(hose_cfg_base + PCI_STATUS, 0xffff);
281 out_8(hose_cfg_base + PCI_LATENCY_TIMER, 0x80);
282 out_8(hose_cfg_base + PCI_CACHE_LINE_SIZE, 0x08);
284 printf("PCIE%d: ", bus);
286 reg16 = in_le16(hose_cfg_base + PCI_LTSSM);
287 if (reg16 >= PCI_LTSSM_L0)
292 mpc83xx_pcie_register_hose(bus, reg, reg16 >= PCI_LTSSM_L0);
296 * The caller must have already set SCCR, SERDES and the PCIE_LAW BARs
297 * must have been set to cover all of the requested regions.
299 void mpc83xx_pcie_init(int num_buses, struct pci_region **reg, int warmboot)
304 * Release PCI RST Output signal.
305 * Power on to RST high must be at least 100 ms as per PCI spec.
306 * On warm boots only 1 ms is required.
308 udelay(warmboot ? 1000 : 100000);
310 for (i = 0; i < num_buses; i++)
311 mpc83xx_pcie_init_bus(i, reg[i]);