1 /* 2 * Old U-boot compatibility for PowerQUICC II 3 * (a.k.a. 82xx with CPM, not the 8240 family of chips) 4 * 5 * Author: Scott Wood <scottwood@freescale.com> 6 * 7 * Copyright (c) 2007 Freescale Semiconductor, Inc. 8 * 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. 12 */ 13 14 #include "ops.h" 15 #include "stdio.h" 16 #include "cuboot.h" 17 #include "io.h" 18 #include "fsl-soc.h" 19 20 #define TARGET_CPM2 21 #define TARGET_HAS_ETH1 22 #include "ppcboot.h" 23 24 static bd_t bd; 25 26 struct cs_range { 27 u32 csnum; 28 u32 base; /* must be zero */ 29 u32 addr; 30 u32 size; 31 }; 32 33 struct pci_range { 34 u32 flags; 35 u32 pci_addr[2]; 36 u32 phys_addr; 37 u32 size[2]; 38 }; 39 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)]; 42 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. 46 * 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. 50 */ 51 static void update_cs_ranges(void) 52 { 53 void *bus_node, *parent_node; 54 u32 *ctrl_addr; 55 unsigned long ctrl_size; 56 u32 naddr, nsize; 57 int len; 58 int i; 59 60 bus_node = finddevice("/localbus"); 61 if (!bus_node || !dt_is_compatible(bus_node, "fsl,pq2-localbus")) 62 return; 63 64 dt_get_reg_format(bus_node, &naddr, &nsize); 65 if (naddr != 2 || nsize != 1) 66 goto err; 67 68 parent_node = get_parent(bus_node); 69 if (!parent_node) 70 goto err; 71 72 dt_get_reg_format(parent_node, &naddr, &nsize); 73 if (naddr != 1 || nsize != 1) 74 goto err; 75 76 if (!dt_xlate_reg(bus_node, 0, (unsigned long *)&ctrl_addr, 77 &ctrl_size)) 78 goto err; 79 80 len = getprop(bus_node, "ranges", cs_ranges_buf, sizeof(cs_ranges_buf)); 81 82 for (i = 0; i < len / sizeof(struct cs_range); i++) { 83 u32 base, option; 84 int cs = cs_ranges_buf[i].csnum; 85 if (cs >= ctrl_size / 8) 86 goto err; 87 88 if (cs_ranges_buf[i].base != 0) 89 goto err; 90 91 base = in_be32(&ctrl_addr[cs * 2]); 92 93 /* If CS is already valid, use the existing flags. 94 * Otherwise, guess a sane default. 95 */ 96 if (base & 1) { 97 base &= 0x7fff; 98 option = in_be32(&ctrl_addr[cs * 2 + 1]) & 0x7fff; 99 } else { 100 base = 0x1801; 101 option = 0x10; 102 } 103 104 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); 108 } 109 110 return; 111 112 err: 113 printf("Bad /localbus node\r\n"); 114 } 115 116 /* 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. 122 */ 123 static void fixup_pci(void) 124 { 125 struct pci_range *mem = NULL, *mmio = NULL, 126 *io = NULL, *mem_base = NULL; 127 u32 *pci_regs[3]; 128 u8 *soc_regs; 129 int i, len; 130 void *node, *parent_node; 131 u32 naddr, nsize, mem_pow2, mem_mask; 132 133 node = finddevice("/pci"); 134 if (!node || !dt_is_compatible(node, "fsl,pq2-pci")) 135 return; 136 137 for (i = 0; i < 3; i++) 138 if (!dt_xlate_reg(node, i, 139 (unsigned long *)&pci_regs[i], NULL)) 140 goto err; 141 142 soc_regs = (u8 *)fsl_get_immr(); 143 if (!soc_regs) 144 goto unhandled; 145 146 dt_get_reg_format(node, &naddr, &nsize); 147 if (naddr != 3 || nsize != 2) 148 goto err; 149 150 parent_node = get_parent(node); 151 if (!parent_node) 152 goto err; 153 154 dt_get_reg_format(parent_node, &naddr, &nsize); 155 if (naddr != 1 || nsize != 1) 156 goto unhandled; 157 158 len = getprop(node, "ranges", pci_ranges_buf, 159 sizeof(pci_ranges_buf)); 160 161 for (i = 0; i < len / sizeof(struct pci_range); i++) { 162 u32 flags = pci_ranges_buf[i].flags & 0x43000000; 163 164 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]; 170 } 171 172 if (!mem || !mmio || !io) 173 goto unhandled; 174 if (mem->size[1] != mmio->size[1]) 175 goto unhandled; 176 if (mem->size[1] & (mem->size[1] - 1)) 177 goto unhandled; 178 if (io->size[1] & (io->size[1] - 1)) 179 goto unhandled; 180 181 if (mem->phys_addr + mem->size[1] == mmio->phys_addr) 182 mem_base = mem; 183 else if (mmio->phys_addr + mmio->size[1] == mem->phys_addr) 184 mem_base = mmio; 185 else 186 goto unhandled; 187 188 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)); 190 191 out_be32(&pci_regs[1][1], io->phys_addr | 1); 192 out_be32(&pci_regs[2][1], ~(io->size[1] - 1)); 193 194 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); 197 198 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); 201 202 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); 205 206 /* Inbound translation */ 207 out_le32(&pci_regs[0][58], 0); 208 out_le32(&pci_regs[0][60], 0); 209 210 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); 213 214 /* 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 */ 217 udelay(100000); 218 219 out_le32(&pci_regs[0][32], 1); 220 221 /* Trhfa (RST# high to first cfg access) 2^25 clocks */ 222 udelay(1020000); 223 } 224 225 /* 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); 228 229 /* Park the bus on PCI, and elevate PCI's arbitration priority, 230 * as required by section 9.6 of the user's manual. 231 */ 232 out_8(&soc_regs[0x10028], 3); 233 out_be32((u32 *)&soc_regs[0x1002c], 0x01236745); 234 235 return; 236 237 err: 238 printf("Bad PCI node -- using existing firmware setup.\r\n"); 239 return; 240 241 unhandled: 242 printf("Unsupported PCI node -- using existing firmware setup.\r\n"); 243 } 244 245 static void pq2_platform_fixups(void) 246 { 247 void *node; 248 249 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); 252 253 node = finddevice("/soc/cpm"); 254 if (node) 255 setprop(node, "clock-frequency", &bd.bi_cpmfreq, 4); 256 257 node = finddevice("/soc/cpm/brg"); 258 if (node) 259 setprop(node, "clock-frequency", &bd.bi_brgfreq, 4); 260 261 update_cs_ranges(); 262 fixup_pci(); 263 } 264 265 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5, 266 unsigned long r6, unsigned long r7) 267 { 268 CUBOOT_INIT(); 269 fdt_init(_dtb_start); 270 serial_console_init(); 271 platform_ops.fixups = pq2_platform_fixups; 272 } 273