2 * Old U-boot compatibility for PowerQUICC II
3 * (a.k.a. 82xx with CPM, not the 8240 family of chips)
5 * Author: Scott Wood <scottwood@freescale.com>
7 * Copyright (c) 2007 Freescale Semiconductor, Inc.
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published
11 * by the Free Software Foundation.
21 #define TARGET_HAS_ETH1
28 u32 base; /* must be zero */
40 struct cs_range cs_ranges_buf[MAX_PROP_LEN / sizeof(struct cs_range)];
41 struct pci_range pci_ranges_buf[MAX_PROP_LEN / sizeof(struct pci_range)];
43 /* Different versions of u-boot put the BCSR in different places, and
44 * some don't set up the PCI PIC at all, so we assume the device tree is
45 * sane and update the BRx registers appropriately.
47 * For any node defined as compatible with fsl,pq2-localbus,
48 * #address/#size must be 2/1 for the localbus, and 1/1 for the parent bus.
49 * Ranges must be for whole chip selects.
51 static void update_cs_ranges(void)
53 void *bus_node, *parent_node;
55 unsigned long ctrl_size;
60 bus_node = finddevice("/localbus");
61 if (!bus_node || !dt_is_compatible(bus_node, "fsl,pq2-localbus"))
64 dt_get_reg_format(bus_node, &naddr, &nsize);
65 if (naddr != 2 || nsize != 1)
68 parent_node = get_parent(bus_node);
72 dt_get_reg_format(parent_node, &naddr, &nsize);
73 if (naddr != 1 || nsize != 1)
76 if (!dt_xlate_reg(bus_node, 0, (unsigned long *)&ctrl_addr,
80 len = getprop(bus_node, "ranges", cs_ranges_buf, sizeof(cs_ranges_buf));
82 for (i = 0; i < len / sizeof(struct cs_range); i++) {
84 int cs = cs_ranges_buf[i].csnum;
85 if (cs >= ctrl_size / 8)
88 if (cs_ranges_buf[i].base != 0)
91 base = in_be32(&ctrl_addr[cs * 2]);
93 /* If CS is already valid, use the existing flags.
94 * Otherwise, guess a sane default.
98 option = in_be32(&ctrl_addr[cs * 2 + 1]) & 0x7fff;
104 out_be32(&ctrl_addr[cs * 2], 0);
105 out_be32(&ctrl_addr[cs * 2 + 1],
106 option | ~(cs_ranges_buf[i].size - 1));
107 out_be32(&ctrl_addr[cs * 2], base | cs_ranges_buf[i].addr);
113 printf("Bad /localbus node\r\n");
116 /* Older u-boots don't set PCI up properly. Update the hardware to match
117 * the device tree. The prefetch mem region and non-prefetch mem region
118 * must be contiguous in the host bus. As required by the PCI binding,
119 * PCI #addr/#size must be 3/2. The parent bus must be 1/1. Only
120 * 32-bit PCI is supported. All three region types (prefetchable mem,
121 * non-prefetchable mem, and I/O) must be present.
123 static void fixup_pci(void)
125 struct pci_range *mem = NULL, *mmio = NULL,
126 *io = NULL, *mem_base = NULL;
130 void *node, *parent_node;
131 u32 naddr, nsize, mem_pow2, mem_mask;
133 node = finddevice("/pci");
134 if (!node || !dt_is_compatible(node, "fsl,pq2-pci"))
137 for (i = 0; i < 3; i++)
138 if (!dt_xlate_reg(node, i,
139 (unsigned long *)&pci_regs[i], NULL))
142 soc_regs = (u8 *)fsl_get_immr();
146 dt_get_reg_format(node, &naddr, &nsize);
147 if (naddr != 3 || nsize != 2)
150 parent_node = get_parent(node);
154 dt_get_reg_format(parent_node, &naddr, &nsize);
155 if (naddr != 1 || nsize != 1)
158 len = getprop(node, "ranges", pci_ranges_buf,
159 sizeof(pci_ranges_buf));
161 for (i = 0; i < len / sizeof(struct pci_range); i++) {
162 u32 flags = pci_ranges_buf[i].flags & 0x43000000;
164 if (flags == 0x42000000)
165 mem = &pci_ranges_buf[i];
166 else if (flags == 0x02000000)
167 mmio = &pci_ranges_buf[i];
168 else if (flags == 0x01000000)
169 io = &pci_ranges_buf[i];
172 if (!mem || !mmio || !io)
174 if (mem->size[1] != mmio->size[1])
176 if (mem->size[1] & (mem->size[1] - 1))
178 if (io->size[1] & (io->size[1] - 1))
181 if (mem->phys_addr + mem->size[1] == mmio->phys_addr)
183 else if (mmio->phys_addr + mmio->size[1] == mem->phys_addr)
188 out_be32(&pci_regs[1][0], mem_base->phys_addr | 1);
189 out_be32(&pci_regs[2][0], ~(mem->size[1] + mmio->size[1] - 1));
191 out_be32(&pci_regs[1][1], io->phys_addr | 1);
192 out_be32(&pci_regs[2][1], ~(io->size[1] - 1));
194 out_le32(&pci_regs[0][0], mem->pci_addr[1] >> 12);
195 out_le32(&pci_regs[0][2], mem->phys_addr >> 12);
196 out_le32(&pci_regs[0][4], (~(mem->size[1] - 1) >> 12) | 0xa0000000);
198 out_le32(&pci_regs[0][6], mmio->pci_addr[1] >> 12);
199 out_le32(&pci_regs[0][8], mmio->phys_addr >> 12);
200 out_le32(&pci_regs[0][10], (~(mmio->size[1] - 1) >> 12) | 0x80000000);
202 out_le32(&pci_regs[0][12], io->pci_addr[1] >> 12);
203 out_le32(&pci_regs[0][14], io->phys_addr >> 12);
204 out_le32(&pci_regs[0][16], (~(io->size[1] - 1) >> 12) | 0xc0000000);
206 /* Inbound translation */
207 out_le32(&pci_regs[0][58], 0);
208 out_le32(&pci_regs[0][60], 0);
210 mem_pow2 = 1 << (__ilog2_u32(bd.bi_memsize - 1) + 1);
211 mem_mask = ~(mem_pow2 - 1) >> 12;
212 out_le32(&pci_regs[0][62], 0xa0000000 | mem_mask);
214 /* If PCI is disabled, drive RST high to enable. */
215 if (!(in_le32(&pci_regs[0][32]) & 1)) {
216 /* Tpvrh (Power valid to RST# high) 100 ms */
219 out_le32(&pci_regs[0][32], 1);
221 /* Trhfa (RST# high to first cfg access) 2^25 clocks */
225 /* Enable bus master and memory access */
226 out_le32(&pci_regs[0][64], 0x80000004);
227 out_le32(&pci_regs[0][65], in_le32(&pci_regs[0][65]) | 6);
229 /* Park the bus on PCI, and elevate PCI's arbitration priority,
230 * as required by section 9.6 of the user's manual.
232 out_8(&soc_regs[0x10028], 3);
233 out_be32((u32 *)&soc_regs[0x1002c], 0x01236745);
238 printf("Bad PCI node -- using existing firmware setup.\r\n");
242 printf("Unsupported PCI node -- using existing firmware setup.\r\n");
245 static void pq2_platform_fixups(void)
249 dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
250 dt_fixup_mac_addresses(bd.bi_enetaddr, bd.bi_enet1addr);
251 dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);
253 node = finddevice("/soc/cpm");
255 setprop(node, "clock-frequency", &bd.bi_cpmfreq, 4);
257 node = finddevice("/soc/cpm/brg");
259 setprop(node, "clock-frequency", &bd.bi_brgfreq, 4);
265 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
266 unsigned long r6, unsigned long r7)
269 fdt_init(_dtb_start);
270 serial_console_init();
271 platform_ops.fixups = pq2_platform_fixups;