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/time.h> 18 #include <asm/machdep.h> 19 #include <asm/rtas.h> 20 #include <asm/mpc52xx.h> 21 22 #define EFIKA_PLATFORM_NAME "Efika" 23 24 25 /* ------------------------------------------------------------------------ */ 26 /* PCI accesses thru RTAS */ 27 /* ------------------------------------------------------------------------ */ 28 29 #ifdef CONFIG_PCI 30 31 /* 32 * Access functions for PCI config space using RTAS calls. 33 */ 34 static int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset, 35 int len, u32 * val) 36 { 37 struct pci_controller *hose = pci_bus_to_host(bus); 38 unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8) 39 | (((bus->number - hose->first_busno) & 0xff) << 16) 40 | (hose->global_number << 24); 41 int ret = -1; 42 int rval; 43 44 rval = rtas_call(rtas_function_token(RTAS_FN_READ_PCI_CONFIG), 2, 2, &ret, addr, len); 45 *val = ret; 46 return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; 47 } 48 49 static int rtas_write_config(struct pci_bus *bus, unsigned int devfn, 50 int offset, int len, u32 val) 51 { 52 struct pci_controller *hose = pci_bus_to_host(bus); 53 unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8) 54 | (((bus->number - hose->first_busno) & 0xff) << 16) 55 | (hose->global_number << 24); 56 int rval; 57 58 rval = rtas_call(rtas_function_token(RTAS_FN_WRITE_PCI_CONFIG), 3, 1, NULL, 59 addr, len, val); 60 return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; 61 } 62 63 static struct pci_ops rtas_pci_ops = { 64 .read = rtas_read_config, 65 .write = rtas_write_config, 66 }; 67 68 69 static void __init efika_pcisetup(void) 70 { 71 const int *bus_range; 72 int len; 73 struct pci_controller *hose; 74 struct device_node *root; 75 struct device_node *pcictrl; 76 77 root = of_find_node_by_path("/"); 78 if (root == NULL) { 79 printk(KERN_WARNING EFIKA_PLATFORM_NAME 80 ": Unable to find the root node\n"); 81 return; 82 } 83 84 for_each_child_of_node(root, pcictrl) 85 if (of_node_name_eq(pcictrl, "pci")) 86 break; 87 88 of_node_put(root); 89 90 if (pcictrl == NULL) { 91 printk(KERN_WARNING EFIKA_PLATFORM_NAME 92 ": Unable to find the PCI bridge node\n"); 93 return; 94 } 95 96 bus_range = of_get_property(pcictrl, "bus-range", &len); 97 if (bus_range == NULL || len < 2 * sizeof(int)) { 98 printk(KERN_WARNING EFIKA_PLATFORM_NAME 99 ": Can't get bus-range for %pOF\n", pcictrl); 100 goto out_put; 101 } 102 103 if (bus_range[1] == bus_range[0]) 104 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d", 105 bus_range[0]); 106 else 107 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d", 108 bus_range[0], bus_range[1]); 109 printk(" controlled by %pOF\n", pcictrl); 110 printk("\n"); 111 112 hose = pcibios_alloc_controller(pcictrl); 113 if (!hose) { 114 printk(KERN_WARNING EFIKA_PLATFORM_NAME 115 ": Can't allocate PCI controller structure for %pOF\n", 116 pcictrl); 117 goto out_put; 118 } 119 120 hose->first_busno = bus_range[0]; 121 hose->last_busno = bus_range[1]; 122 hose->ops = &rtas_pci_ops; 123 124 pci_process_bridge_OF_ranges(hose, pcictrl, 0); 125 return; 126 out_put: 127 of_node_put(pcictrl); 128 } 129 130 #else 131 static void __init efika_pcisetup(void) 132 {} 133 #endif 134 135 136 137 /* ------------------------------------------------------------------------ */ 138 /* Platform setup */ 139 /* ------------------------------------------------------------------------ */ 140 141 static void efika_show_cpuinfo(struct seq_file *m) 142 { 143 struct device_node *root; 144 const char *revision; 145 const char *codegendescription; 146 const char *codegenvendor; 147 148 root = of_find_node_by_path("/"); 149 if (!root) 150 return; 151 152 revision = of_get_property(root, "revision", NULL); 153 codegendescription = of_get_property(root, "CODEGEN,description", NULL); 154 codegenvendor = of_get_property(root, "CODEGEN,vendor", NULL); 155 156 if (codegendescription) 157 seq_printf(m, "machine\t\t: %s\n", codegendescription); 158 else 159 seq_printf(m, "machine\t\t: Efika\n"); 160 161 if (revision) 162 seq_printf(m, "revision\t: %s\n", revision); 163 164 if (codegenvendor) 165 seq_printf(m, "vendor\t\t: %s\n", codegenvendor); 166 167 of_node_put(root); 168 } 169 170 #ifdef CONFIG_PM 171 static void efika_suspend_prepare(void __iomem *mbar) 172 { 173 u8 pin = 4; /* GPIO_WKUP_4 (GPIO_PSC6_0 - IRDA_RX) */ 174 u8 level = 1; /* wakeup on high level */ 175 /* IOW. to wake it up, short pins 1 and 3 on IRDA connector */ 176 mpc52xx_set_wakeup_gpio(pin, level); 177 } 178 #endif 179 180 static void __init efika_setup_arch(void) 181 { 182 rtas_initialize(); 183 184 /* Map important registers from the internal memory map */ 185 mpc52xx_map_common_devices(); 186 187 #ifdef CONFIG_PM 188 mpc52xx_suspend.board_suspend_prepare = efika_suspend_prepare; 189 mpc52xx_pm_init(); 190 #endif 191 192 if (ppc_md.progress) 193 ppc_md.progress("Linux/PPC " UTS_RELEASE " running on Efika ;-)\n", 0x0); 194 } 195 196 static int __init efika_probe(void) 197 { 198 const char *model = of_get_property(of_root, "model", NULL); 199 200 if (model == NULL) 201 return 0; 202 if (strcmp(model, "EFIKA5K2")) 203 return 0; 204 205 DMA_MODE_READ = 0x44; 206 DMA_MODE_WRITE = 0x48; 207 208 pm_power_off = rtas_power_off; 209 210 return 1; 211 } 212 213 define_machine(efika) 214 { 215 .name = EFIKA_PLATFORM_NAME, 216 .probe = efika_probe, 217 .setup_arch = efika_setup_arch, 218 .discover_phbs = efika_pcisetup, 219 .init = mpc52xx_declare_of_platform_devices, 220 .show_cpuinfo = efika_show_cpuinfo, 221 .init_IRQ = mpc52xx_init_irq, 222 .get_irq = mpc52xx_get_irq, 223 .restart = rtas_restart, 224 .halt = rtas_halt, 225 .set_rtc_time = rtas_set_rtc_time, 226 .get_rtc_time = rtas_get_rtc_time, 227 .progress = rtas_progress, 228 .get_boot_time = rtas_get_boot_time, 229 #ifdef CONFIG_PCI 230 .phys_mem_access_prot = pci_phys_mem_access_prot, 231 #endif 232 }; 233 234