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_each_child_of_node(root, pcictrl) 86 if (of_node_name_eq(pcictrl, "pci")) 87 break; 88 89 of_node_put(root); 90 91 if (pcictrl == NULL) { 92 printk(KERN_WARNING EFIKA_PLATFORM_NAME 93 ": Unable to find the PCI bridge node\n"); 94 return; 95 } 96 97 bus_range = of_get_property(pcictrl, "bus-range", &len); 98 if (bus_range == NULL || len < 2 * sizeof(int)) { 99 printk(KERN_WARNING EFIKA_PLATFORM_NAME 100 ": Can't get bus-range for %pOF\n", pcictrl); 101 goto out_put; 102 } 103 104 if (bus_range[1] == bus_range[0]) 105 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d", 106 bus_range[0]); 107 else 108 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d", 109 bus_range[0], bus_range[1]); 110 printk(" controlled by %pOF\n", pcictrl); 111 printk("\n"); 112 113 hose = pcibios_alloc_controller(pcictrl); 114 if (!hose) { 115 printk(KERN_WARNING EFIKA_PLATFORM_NAME 116 ": Can't allocate PCI controller structure for %pOF\n", 117 pcictrl); 118 goto out_put; 119 } 120 121 hose->first_busno = bus_range[0]; 122 hose->last_busno = bus_range[1]; 123 hose->ops = &rtas_pci_ops; 124 125 pci_process_bridge_OF_ranges(hose, pcictrl, 0); 126 return; 127 out_put: 128 of_node_put(pcictrl); 129 } 130 131 #else 132 static void __init efika_pcisetup(void) 133 {} 134 #endif 135 136 137 138 /* ------------------------------------------------------------------------ */ 139 /* Platform setup */ 140 /* ------------------------------------------------------------------------ */ 141 142 static void efika_show_cpuinfo(struct seq_file *m) 143 { 144 struct device_node *root; 145 const char *revision; 146 const char *codegendescription; 147 const char *codegenvendor; 148 149 root = of_find_node_by_path("/"); 150 if (!root) 151 return; 152 153 revision = of_get_property(root, "revision", NULL); 154 codegendescription = of_get_property(root, "CODEGEN,description", NULL); 155 codegenvendor = of_get_property(root, "CODEGEN,vendor", NULL); 156 157 if (codegendescription) 158 seq_printf(m, "machine\t\t: %s\n", codegendescription); 159 else 160 seq_printf(m, "machine\t\t: Efika\n"); 161 162 if (revision) 163 seq_printf(m, "revision\t: %s\n", revision); 164 165 if (codegenvendor) 166 seq_printf(m, "vendor\t\t: %s\n", codegenvendor); 167 168 of_node_put(root); 169 } 170 171 #ifdef CONFIG_PM 172 static void efika_suspend_prepare(void __iomem *mbar) 173 { 174 u8 pin = 4; /* GPIO_WKUP_4 (GPIO_PSC6_0 - IRDA_RX) */ 175 u8 level = 1; /* wakeup on high level */ 176 /* IOW. to wake it up, short pins 1 and 3 on IRDA connector */ 177 mpc52xx_set_wakeup_gpio(pin, level); 178 } 179 #endif 180 181 static void __init efika_setup_arch(void) 182 { 183 rtas_initialize(); 184 185 /* Map important registers from the internal memory map */ 186 mpc52xx_map_common_devices(); 187 188 #ifdef CONFIG_PM 189 mpc52xx_suspend.board_suspend_prepare = efika_suspend_prepare; 190 mpc52xx_pm_init(); 191 #endif 192 193 if (ppc_md.progress) 194 ppc_md.progress("Linux/PPC " UTS_RELEASE " running on Efika ;-)\n", 0x0); 195 } 196 197 static int __init efika_probe(void) 198 { 199 const char *model = of_get_property(of_root, "model", NULL); 200 201 if (model == NULL) 202 return 0; 203 if (strcmp(model, "EFIKA5K2")) 204 return 0; 205 206 DMA_MODE_READ = 0x44; 207 DMA_MODE_WRITE = 0x48; 208 209 pm_power_off = rtas_power_off; 210 211 return 1; 212 } 213 214 define_machine(efika) 215 { 216 .name = EFIKA_PLATFORM_NAME, 217 .probe = efika_probe, 218 .setup_arch = efika_setup_arch, 219 .discover_phbs = efika_pcisetup, 220 .init = mpc52xx_declare_of_platform_devices, 221 .show_cpuinfo = efika_show_cpuinfo, 222 .init_IRQ = mpc52xx_init_irq, 223 .get_irq = mpc52xx_get_irq, 224 .restart = rtas_restart, 225 .halt = rtas_halt, 226 .set_rtc_time = rtas_set_rtc_time, 227 .get_rtc_time = rtas_get_rtc_time, 228 .progress = rtas_progress, 229 .get_boot_time = rtas_get_boot_time, 230 .calibrate_decr = generic_calibrate_decr, 231 #ifdef CONFIG_PCI 232 .phys_mem_access_prot = pci_phys_mem_access_prot, 233 #endif 234 }; 235 236