Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 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/errno.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/reboot.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/utsrelease.h> |
| 18 | #include <linux/seq_file.h> |
| 19 | #include <linux/string.h> |
| 20 | #include <linux/root_dev.h> |
| 21 | #include <linux/initrd.h> |
| 22 | #include <linux/timer.h> |
| 23 | #include <linux/pci.h> |
| 24 | |
| 25 | #include <asm/io.h> |
| 26 | #include <asm/irq.h> |
| 27 | #include <asm/sections.h> |
| 28 | #include <asm/pci-bridge.h> |
| 29 | #include <asm/pgtable.h> |
| 30 | #include <asm/prom.h> |
| 31 | #include <asm/time.h> |
| 32 | #include <asm/machdep.h> |
| 33 | #include <asm/rtas.h> |
| 34 | #include <asm/of_device.h> |
| 35 | #include <asm/of_platform.h> |
| 36 | #include <asm/mpc52xx.h> |
| 37 | |
| 38 | |
| 39 | #define EFIKA_PLATFORM_NAME "Efika" |
| 40 | |
| 41 | |
| 42 | /* ------------------------------------------------------------------------ */ |
| 43 | /* PCI accesses thru RTAS */ |
| 44 | /* ------------------------------------------------------------------------ */ |
| 45 | |
| 46 | #ifdef CONFIG_PCI |
| 47 | |
| 48 | /* |
| 49 | * Access functions for PCI config space using RTAS calls. |
| 50 | */ |
| 51 | static int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset, |
| 52 | int len, u32 * val) |
| 53 | { |
| 54 | struct pci_controller *hose = bus->sysdata; |
| 55 | unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8) |
| 56 | | (((bus->number - hose->first_busno) & 0xff) << 16) |
Kumar Gala | 5516b54 | 2007-06-27 01:17:57 -0500 | [diff] [blame] | 57 | | (hose->global_number << 24); |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 58 | int ret = -1; |
| 59 | int rval; |
| 60 | |
| 61 | rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len); |
| 62 | *val = ret; |
| 63 | return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; |
| 64 | } |
| 65 | |
| 66 | static int rtas_write_config(struct pci_bus *bus, unsigned int devfn, |
| 67 | int offset, int len, u32 val) |
| 68 | { |
| 69 | struct pci_controller *hose = bus->sysdata; |
| 70 | unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8) |
| 71 | | (((bus->number - hose->first_busno) & 0xff) << 16) |
Kumar Gala | 5516b54 | 2007-06-27 01:17:57 -0500 | [diff] [blame] | 72 | | (hose->global_number << 24); |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 73 | int rval; |
| 74 | |
| 75 | rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL, |
| 76 | addr, len, val); |
| 77 | return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; |
| 78 | } |
| 79 | |
| 80 | static struct pci_ops rtas_pci_ops = { |
Nathan Lynch | 21d8f6c | 2007-08-10 05:18:43 +1000 | [diff] [blame^] | 81 | .read = rtas_read_config, |
| 82 | .write = rtas_write_config, |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 83 | }; |
| 84 | |
| 85 | |
Domen Puncer | d3e0e02 | 2007-07-09 09:52:03 +0200 | [diff] [blame] | 86 | static void __init efika_pcisetup(void) |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 87 | { |
| 88 | const int *bus_range; |
| 89 | int len; |
| 90 | struct pci_controller *hose; |
| 91 | struct device_node *root; |
| 92 | struct device_node *pcictrl; |
| 93 | |
| 94 | root = of_find_node_by_path("/"); |
| 95 | if (root == NULL) { |
| 96 | printk(KERN_WARNING EFIKA_PLATFORM_NAME |
| 97 | ": Unable to find the root node\n"); |
| 98 | return; |
| 99 | } |
| 100 | |
| 101 | for (pcictrl = NULL;;) { |
| 102 | pcictrl = of_get_next_child(root, pcictrl); |
| 103 | if ((pcictrl == NULL) || (strcmp(pcictrl->name, "pci") == 0)) |
| 104 | break; |
| 105 | } |
| 106 | |
| 107 | of_node_put(root); |
| 108 | |
| 109 | if (pcictrl == NULL) { |
| 110 | printk(KERN_WARNING EFIKA_PLATFORM_NAME |
| 111 | ": Unable to find the PCI bridge node\n"); |
| 112 | return; |
| 113 | } |
| 114 | |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 115 | bus_range = of_get_property(pcictrl, "bus-range", &len); |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 116 | if (bus_range == NULL || len < 2 * sizeof(int)) { |
| 117 | printk(KERN_WARNING EFIKA_PLATFORM_NAME |
| 118 | ": Can't get bus-range for %s\n", pcictrl->full_name); |
| 119 | return; |
| 120 | } |
| 121 | |
| 122 | if (bus_range[1] == bus_range[0]) |
| 123 | printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d", |
| 124 | bus_range[0]); |
| 125 | else |
| 126 | printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d", |
| 127 | bus_range[0], bus_range[1]); |
| 128 | printk(" controlled by %s\n", pcictrl->full_name); |
| 129 | printk("\n"); |
| 130 | |
Kumar Gala | dbf8471 | 2007-06-27 01:56:50 -0500 | [diff] [blame] | 131 | hose = pcibios_alloc_controller(of_node_get(pcictrl)); |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 132 | if (!hose) { |
| 133 | printk(KERN_WARNING EFIKA_PLATFORM_NAME |
| 134 | ": Can't allocate PCI controller structure for %s\n", |
| 135 | pcictrl->full_name); |
| 136 | return; |
| 137 | } |
| 138 | |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 139 | hose->first_busno = bus_range[0]; |
| 140 | hose->last_busno = bus_range[1]; |
| 141 | hose->ops = &rtas_pci_ops; |
| 142 | |
| 143 | pci_process_bridge_OF_ranges(hose, pcictrl, 0); |
| 144 | } |
| 145 | |
| 146 | #else |
Domen Puncer | d3e0e02 | 2007-07-09 09:52:03 +0200 | [diff] [blame] | 147 | static void __init efika_pcisetup(void) |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 148 | {} |
| 149 | #endif |
| 150 | |
| 151 | |
| 152 | |
| 153 | /* ------------------------------------------------------------------------ */ |
| 154 | /* Platform setup */ |
| 155 | /* ------------------------------------------------------------------------ */ |
| 156 | |
| 157 | static void efika_show_cpuinfo(struct seq_file *m) |
| 158 | { |
| 159 | struct device_node *root; |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 160 | const char *revision; |
| 161 | const char *codegendescription; |
| 162 | const char *codegenvendor; |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 163 | |
| 164 | root = of_find_node_by_path("/"); |
| 165 | if (!root) |
| 166 | return; |
| 167 | |
Stephen Rothwell | e2eb639 | 2007-04-03 22:26:41 +1000 | [diff] [blame] | 168 | revision = of_get_property(root, "revision", NULL); |
| 169 | codegendescription = of_get_property(root, "CODEGEN,description", NULL); |
| 170 | codegenvendor = of_get_property(root, "CODEGEN,vendor", NULL); |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 171 | |
| 172 | if (codegendescription) |
| 173 | seq_printf(m, "machine\t\t: %s\n", codegendescription); |
| 174 | else |
| 175 | seq_printf(m, "machine\t\t: Efika\n"); |
| 176 | |
| 177 | if (revision) |
| 178 | seq_printf(m, "revision\t: %s\n", revision); |
| 179 | |
| 180 | if (codegenvendor) |
| 181 | seq_printf(m, "vendor\t\t: %s\n", codegenvendor); |
| 182 | |
| 183 | of_node_put(root); |
| 184 | } |
| 185 | |
Domen Puncer | 2e1ee1f | 2007-05-07 01:38:52 +1000 | [diff] [blame] | 186 | #ifdef CONFIG_PM |
| 187 | static void efika_suspend_prepare(void __iomem *mbar) |
| 188 | { |
| 189 | u8 pin = 4; /* GPIO_WKUP_4 (GPIO_PSC6_0 - IRDA_RX) */ |
| 190 | u8 level = 1; /* wakeup on high level */ |
| 191 | /* IOW. to wake it up, short pins 1 and 3 on IRDA connector */ |
| 192 | mpc52xx_set_wakeup_gpio(pin, level); |
| 193 | } |
| 194 | #endif |
| 195 | |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 196 | static void __init efika_setup_arch(void) |
| 197 | { |
| 198 | rtas_initialize(); |
| 199 | |
| 200 | #ifdef CONFIG_BLK_DEV_INITRD |
| 201 | initrd_below_start_ok = 1; |
| 202 | |
| 203 | if (initrd_start) |
| 204 | ROOT_DEV = Root_RAM0; |
| 205 | else |
| 206 | #endif |
| 207 | ROOT_DEV = Root_SDA2; /* sda2 (sda1 is for the kernel) */ |
| 208 | |
| 209 | efika_pcisetup(); |
| 210 | |
Domen Puncer | 2e1ee1f | 2007-05-07 01:38:52 +1000 | [diff] [blame] | 211 | #ifdef CONFIG_PM |
| 212 | mpc52xx_suspend.board_suspend_prepare = efika_suspend_prepare; |
| 213 | mpc52xx_pm_init(); |
| 214 | #endif |
| 215 | |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 216 | if (ppc_md.progress) |
| 217 | ppc_md.progress("Linux/PPC " UTS_RELEASE " running on Efika ;-)\n", 0x0); |
| 218 | } |
| 219 | |
| 220 | static int __init efika_probe(void) |
| 221 | { |
| 222 | char *model = of_get_flat_dt_prop(of_get_flat_dt_root(), |
| 223 | "model", NULL); |
| 224 | |
| 225 | if (model == NULL) |
| 226 | return 0; |
| 227 | if (strcmp(model, "EFIKA5K2")) |
| 228 | return 0; |
| 229 | |
| 230 | ISA_DMA_THRESHOLD = ~0L; |
| 231 | DMA_MODE_READ = 0x44; |
| 232 | DMA_MODE_WRITE = 0x48; |
| 233 | |
| 234 | return 1; |
| 235 | } |
| 236 | |
| 237 | define_machine(efika) |
| 238 | { |
| 239 | .name = EFIKA_PLATFORM_NAME, |
| 240 | .probe = efika_probe, |
| 241 | .setup_arch = efika_setup_arch, |
| 242 | .init = mpc52xx_declare_of_platform_devices, |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 243 | .show_cpuinfo = efika_show_cpuinfo, |
| 244 | .init_IRQ = mpc52xx_init_irq, |
| 245 | .get_irq = mpc52xx_get_irq, |
| 246 | .restart = rtas_restart, |
| 247 | .power_off = rtas_power_off, |
| 248 | .halt = rtas_halt, |
| 249 | .set_rtc_time = rtas_set_rtc_time, |
| 250 | .get_rtc_time = rtas_get_rtc_time, |
| 251 | .progress = rtas_progress, |
| 252 | .get_boot_time = rtas_get_boot_time, |
| 253 | .calibrate_decr = generic_calibrate_decr, |
Arnd Bergmann | d665840 | 2007-06-18 01:06:57 +0200 | [diff] [blame] | 254 | #ifdef CONFIG_PCI |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 255 | .phys_mem_access_prot = pci_phys_mem_access_prot, |
Arnd Bergmann | d665840 | 2007-06-18 01:06:57 +0200 | [diff] [blame] | 256 | #endif |
Sylvain Munaut | 9724b86 | 2007-02-12 23:13:24 +0100 | [diff] [blame] | 257 | }; |
| 258 | |