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/prom.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 */ 34static 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_token("read-pci-config"), 2, 2, &ret, addr, len); 45 *val = ret; 46 return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; 47} 48 49static 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_token("write-pci-config"), 3, 1, NULL, 59 addr, len, val); 60 return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; 61} 62 63static struct pci_ops rtas_pci_ops = { 64 .read = rtas_read_config, 65 .write = rtas_write_config, 66}; 67 68 69static 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 (pcictrl = NULL;;) { 85 pcictrl = of_get_next_child(root, pcictrl); 86 if ((pcictrl == NULL) || (strcmp(pcictrl->name, "pci") == 0)) 87 break; 88 } 89 90 of_node_put(root); 91 92 if (pcictrl == NULL) { 93 printk(KERN_WARNING EFIKA_PLATFORM_NAME 94 ": Unable to find the PCI bridge node\n"); 95 return; 96 } 97 98 bus_range = of_get_property(pcictrl, "bus-range", &len); 99 if (bus_range == NULL || len < 2 * sizeof(int)) { 100 printk(KERN_WARNING EFIKA_PLATFORM_NAME 101 ": Can't get bus-range for %s\n", pcictrl->full_name); 102 goto out_put; 103 } 104 105 if (bus_range[1] == bus_range[0]) 106 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d", 107 bus_range[0]); 108 else 109 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d", 110 bus_range[0], bus_range[1]); 111 printk(" controlled by %s\n", pcictrl->full_name); 112 printk("\n"); 113 114 hose = pcibios_alloc_controller(pcictrl); 115 if (!hose) { 116 printk(KERN_WARNING EFIKA_PLATFORM_NAME 117 ": Can't allocate PCI controller structure for %s\n", 118 pcictrl->full_name); 119 goto out_put; 120 } 121 122 hose->first_busno = bus_range[0]; 123 hose->last_busno = bus_range[1]; 124 hose->ops = &rtas_pci_ops; 125 126 pci_process_bridge_OF_ranges(hose, pcictrl, 0); 127 return; 128out_put: 129 of_node_put(pcictrl); 130} 131 132#else 133static void __init efika_pcisetup(void) 134{} 135#endif 136 137 138 139/* ------------------------------------------------------------------------ */ 140/* Platform setup */ 141/* ------------------------------------------------------------------------ */ 142 143static void efika_show_cpuinfo(struct seq_file *m) 144{ 145 struct device_node *root; 146 const char *revision; 147 const char *codegendescription; 148 const char *codegenvendor; 149 150 root = of_find_node_by_path("/"); 151 if (!root) 152 return; 153 154 revision = of_get_property(root, "revision", NULL); 155 codegendescription = of_get_property(root, "CODEGEN,description", NULL); 156 codegenvendor = of_get_property(root, "CODEGEN,vendor", NULL); 157 158 if (codegendescription) 159 seq_printf(m, "machine\t\t: %s\n", codegendescription); 160 else 161 seq_printf(m, "machine\t\t: Efika\n"); 162 163 if (revision) 164 seq_printf(m, "revision\t: %s\n", revision); 165 166 if (codegenvendor) 167 seq_printf(m, "vendor\t\t: %s\n", codegenvendor); 168 169 of_node_put(root); 170} 171 172#ifdef CONFIG_PM 173static void efika_suspend_prepare(void __iomem *mbar) 174{ 175 u8 pin = 4; /* GPIO_WKUP_4 (GPIO_PSC6_0 - IRDA_RX) */ 176 u8 level = 1; /* wakeup on high level */ 177 /* IOW. to wake it up, short pins 1 and 3 on IRDA connector */ 178 mpc52xx_set_wakeup_gpio(pin, level); 179} 180#endif 181 182static void __init efika_setup_arch(void) 183{ 184 rtas_initialize(); 185 186 /* Map important registers from the internal memory map */ 187 mpc52xx_map_common_devices(); 188 189 efika_pcisetup(); 190 191#ifdef CONFIG_PM 192 mpc52xx_suspend.board_suspend_prepare = efika_suspend_prepare; 193 mpc52xx_pm_init(); 194#endif 195 196 if (ppc_md.progress) 197 ppc_md.progress("Linux/PPC " UTS_RELEASE " running on Efika ;-)\n", 0x0); 198} 199 200static int __init efika_probe(void) 201{ 202 char *model = of_get_flat_dt_prop(of_get_flat_dt_root(), 203 "model", NULL); 204 205 if (model == NULL) 206 return 0; 207 if (strcmp(model, "EFIKA5K2")) 208 return 0; 209 210 ISA_DMA_THRESHOLD = ~0L; 211 DMA_MODE_READ = 0x44; 212 DMA_MODE_WRITE = 0x48; 213 214 return 1; 215} 216 217define_machine(efika) 218{ 219 .name = EFIKA_PLATFORM_NAME, 220 .probe = efika_probe, 221 .setup_arch = efika_setup_arch, 222 .init = mpc52xx_declare_of_platform_devices, 223 .show_cpuinfo = efika_show_cpuinfo, 224 .init_IRQ = mpc52xx_init_irq, 225 .get_irq = mpc52xx_get_irq, 226 .restart = rtas_restart, 227 .power_off = rtas_power_off, 228 .halt = rtas_halt, 229 .set_rtc_time = rtas_set_rtc_time, 230 .get_rtc_time = rtas_get_rtc_time, 231 .progress = rtas_progress, 232 .get_boot_time = rtas_get_boot_time, 233 .calibrate_decr = generic_calibrate_decr, 234#ifdef CONFIG_PCI 235 .phys_mem_access_prot = pci_phys_mem_access_prot, 236#endif 237}; 238