1 /* 2 * Efika 5K2 platform code 3 * Some code really inspired from the lite5200b platform. 4 * 5 * Copyright (C) 2006 bplan GmbH 6 * 7 * This file is licensed under the terms of the GNU General Public License 8 * version 2. This program is licensed "as is" without any warranty of any 9 * kind, whether express or implied. 10 */ 11 12 #include <linux/init.h> 13 #include <generated/utsrelease.h> 14 #include <linux/pci.h> 15 #include <linux/of.h> 16 #include <asm/dma.h> 17 #include <asm/prom.h> 18 #include <asm/time.h> 19 #include <asm/machdep.h> 20 #include <asm/rtas.h> 21 #include <asm/mpc52xx.h> 22 23 #define EFIKA_PLATFORM_NAME "Efika" 24 25 26 /* ------------------------------------------------------------------------ */ 27 /* PCI accesses thru RTAS */ 28 /* ------------------------------------------------------------------------ */ 29 30 #ifdef CONFIG_PCI 31 32 /* 33 * Access functions for PCI config space using RTAS calls. 34 */ 35 static int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset, 36 int len, u32 * val) 37 { 38 struct pci_controller *hose = pci_bus_to_host(bus); 39 unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8) 40 | (((bus->number - hose->first_busno) & 0xff) << 16) 41 | (hose->global_number << 24); 42 int ret = -1; 43 int rval; 44 45 rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len); 46 *val = ret; 47 return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; 48 } 49 50 static int rtas_write_config(struct pci_bus *bus, unsigned int devfn, 51 int offset, int len, u32 val) 52 { 53 struct pci_controller *hose = pci_bus_to_host(bus); 54 unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8) 55 | (((bus->number - hose->first_busno) & 0xff) << 16) 56 | (hose->global_number << 24); 57 int rval; 58 59 rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL, 60 addr, len, val); 61 return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; 62 } 63 64 static struct pci_ops rtas_pci_ops = { 65 .read = rtas_read_config, 66 .write = rtas_write_config, 67 }; 68 69 70 static void __init efika_pcisetup(void) 71 { 72 const int *bus_range; 73 int len; 74 struct pci_controller *hose; 75 struct device_node *root; 76 struct device_node *pcictrl; 77 78 root = of_find_node_by_path("/"); 79 if (root == NULL) { 80 printk(KERN_WARNING EFIKA_PLATFORM_NAME 81 ": Unable to find the root node\n"); 82 return; 83 } 84 85 for (pcictrl = NULL;;) { 86 pcictrl = of_get_next_child(root, pcictrl); 87 if ((pcictrl == NULL) || (strcmp(pcictrl->name, "pci") == 0)) 88 break; 89 } 90 91 of_node_put(root); 92 93 if (pcictrl == NULL) { 94 printk(KERN_WARNING EFIKA_PLATFORM_NAME 95 ": Unable to find the PCI bridge node\n"); 96 return; 97 } 98 99 bus_range = of_get_property(pcictrl, "bus-range", &len); 100 if (bus_range == NULL || len < 2 * sizeof(int)) { 101 printk(KERN_WARNING EFIKA_PLATFORM_NAME 102 ": Can't get bus-range for %s\n", pcictrl->full_name); 103 goto out_put; 104 } 105 106 if (bus_range[1] == bus_range[0]) 107 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d", 108 bus_range[0]); 109 else 110 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d", 111 bus_range[0], bus_range[1]); 112 printk(" controlled by %s\n", pcictrl->full_name); 113 printk("\n"); 114 115 hose = pcibios_alloc_controller(pcictrl); 116 if (!hose) { 117 printk(KERN_WARNING EFIKA_PLATFORM_NAME 118 ": Can't allocate PCI controller structure for %s\n", 119 pcictrl->full_name); 120 goto out_put; 121 } 122 123 hose->first_busno = bus_range[0]; 124 hose->last_busno = bus_range[1]; 125 hose->ops = &rtas_pci_ops; 126 127 pci_process_bridge_OF_ranges(hose, pcictrl, 0); 128 return; 129 out_put: 130 of_node_put(pcictrl); 131 } 132 133 #else 134 static void __init efika_pcisetup(void) 135 {} 136 #endif 137 138 139 140 /* ------------------------------------------------------------------------ */ 141 /* Platform setup */ 142 /* ------------------------------------------------------------------------ */ 143 144 static void efika_show_cpuinfo(struct seq_file *m) 145 { 146 struct device_node *root; 147 const char *revision; 148 const char *codegendescription; 149 const char *codegenvendor; 150 151 root = of_find_node_by_path("/"); 152 if (!root) 153 return; 154 155 revision = of_get_property(root, "revision", NULL); 156 codegendescription = of_get_property(root, "CODEGEN,description", NULL); 157 codegenvendor = of_get_property(root, "CODEGEN,vendor", NULL); 158 159 if (codegendescription) 160 seq_printf(m, "machine\t\t: %s\n", codegendescription); 161 else 162 seq_printf(m, "machine\t\t: Efika\n"); 163 164 if (revision) 165 seq_printf(m, "revision\t: %s\n", revision); 166 167 if (codegenvendor) 168 seq_printf(m, "vendor\t\t: %s\n", codegenvendor); 169 170 of_node_put(root); 171 } 172 173 #ifdef CONFIG_PM 174 static void efika_suspend_prepare(void __iomem *mbar) 175 { 176 u8 pin = 4; /* GPIO_WKUP_4 (GPIO_PSC6_0 - IRDA_RX) */ 177 u8 level = 1; /* wakeup on high level */ 178 /* IOW. to wake it up, short pins 1 and 3 on IRDA connector */ 179 mpc52xx_set_wakeup_gpio(pin, level); 180 } 181 #endif 182 183 static void __init efika_setup_arch(void) 184 { 185 rtas_initialize(); 186 187 /* Map important registers from the internal memory map */ 188 mpc52xx_map_common_devices(); 189 190 efika_pcisetup(); 191 192 #ifdef CONFIG_PM 193 mpc52xx_suspend.board_suspend_prepare = efika_suspend_prepare; 194 mpc52xx_pm_init(); 195 #endif 196 197 if (ppc_md.progress) 198 ppc_md.progress("Linux/PPC " UTS_RELEASE " running on Efika ;-)\n", 0x0); 199 } 200 201 static int __init efika_probe(void) 202 { 203 const char *model = of_get_flat_dt_prop(of_get_flat_dt_root(), 204 "model", NULL); 205 206 if (model == NULL) 207 return 0; 208 if (strcmp(model, "EFIKA5K2")) 209 return 0; 210 211 ISA_DMA_THRESHOLD = ~0L; 212 DMA_MODE_READ = 0x44; 213 DMA_MODE_WRITE = 0x48; 214 215 pm_power_off = rtas_power_off; 216 217 return 1; 218 } 219 220 define_machine(efika) 221 { 222 .name = EFIKA_PLATFORM_NAME, 223 .probe = efika_probe, 224 .setup_arch = efika_setup_arch, 225 .init = mpc52xx_declare_of_platform_devices, 226 .show_cpuinfo = efika_show_cpuinfo, 227 .init_IRQ = mpc52xx_init_irq, 228 .get_irq = mpc52xx_get_irq, 229 .restart = rtas_restart, 230 .halt = rtas_halt, 231 .set_rtc_time = rtas_set_rtc_time, 232 .get_rtc_time = rtas_get_rtc_time, 233 .progress = rtas_progress, 234 .get_boot_time = rtas_get_boot_time, 235 .calibrate_decr = generic_calibrate_decr, 236 #ifdef CONFIG_PCI 237 .phys_mem_access_prot = pci_phys_mem_access_prot, 238 #endif 239 }; 240 241