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235 lines
5.9 KiB
235 lines
5.9 KiB
/* |
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* Efika 5K2 platform code |
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* Some code really inspired from the lite5200b platform. |
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* |
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* Copyright (C) 2006 bplan GmbH |
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* |
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* This file is licensed under the terms of the GNU General Public License |
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* version 2. This program is licensed "as is" without any warranty of any |
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* kind, whether express or implied. |
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*/ |
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#include <linux/init.h> |
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#include <generated/utsrelease.h> |
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#include <linux/pci.h> |
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#include <linux/of.h> |
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#include <asm/dma.h> |
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#include <asm/prom.h> |
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#include <asm/time.h> |
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#include <asm/machdep.h> |
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#include <asm/rtas.h> |
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#include <asm/mpc52xx.h> |
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#define EFIKA_PLATFORM_NAME "Efika" |
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/* ------------------------------------------------------------------------ */ |
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/* PCI accesses thru RTAS */ |
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/* ------------------------------------------------------------------------ */ |
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#ifdef CONFIG_PCI |
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/* |
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* Access functions for PCI config space using RTAS calls. |
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*/ |
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static int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset, |
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int len, u32 * val) |
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{ |
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struct pci_controller *hose = pci_bus_to_host(bus); |
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unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8) |
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| (((bus->number - hose->first_busno) & 0xff) << 16) |
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| (hose->global_number << 24); |
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int ret = -1; |
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int rval; |
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rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len); |
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*val = ret; |
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return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; |
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} |
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static int rtas_write_config(struct pci_bus *bus, unsigned int devfn, |
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int offset, int len, u32 val) |
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{ |
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struct pci_controller *hose = pci_bus_to_host(bus); |
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unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8) |
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| (((bus->number - hose->first_busno) & 0xff) << 16) |
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| (hose->global_number << 24); |
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int rval; |
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rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL, |
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addr, len, val); |
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return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL; |
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} |
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static struct pci_ops rtas_pci_ops = { |
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.read = rtas_read_config, |
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.write = rtas_write_config, |
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}; |
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static void __init efika_pcisetup(void) |
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{ |
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const int *bus_range; |
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int len; |
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struct pci_controller *hose; |
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struct device_node *root; |
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struct device_node *pcictrl; |
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root = of_find_node_by_path("/"); |
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if (root == NULL) { |
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printk(KERN_WARNING EFIKA_PLATFORM_NAME |
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": Unable to find the root node\n"); |
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return; |
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} |
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for_each_child_of_node(root, pcictrl) |
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if (of_node_name_eq(pcictrl, "pci")) |
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break; |
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of_node_put(root); |
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if (pcictrl == NULL) { |
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printk(KERN_WARNING EFIKA_PLATFORM_NAME |
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": Unable to find the PCI bridge node\n"); |
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return; |
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} |
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bus_range = of_get_property(pcictrl, "bus-range", &len); |
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if (bus_range == NULL || len < 2 * sizeof(int)) { |
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printk(KERN_WARNING EFIKA_PLATFORM_NAME |
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": Can't get bus-range for %pOF\n", pcictrl); |
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goto out_put; |
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} |
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if (bus_range[1] == bus_range[0]) |
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printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d", |
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bus_range[0]); |
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else |
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printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d", |
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bus_range[0], bus_range[1]); |
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printk(" controlled by %pOF\n", pcictrl); |
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printk("\n"); |
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hose = pcibios_alloc_controller(pcictrl); |
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if (!hose) { |
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printk(KERN_WARNING EFIKA_PLATFORM_NAME |
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": Can't allocate PCI controller structure for %pOF\n", |
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pcictrl); |
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goto out_put; |
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} |
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hose->first_busno = bus_range[0]; |
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hose->last_busno = bus_range[1]; |
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hose->ops = &rtas_pci_ops; |
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pci_process_bridge_OF_ranges(hose, pcictrl, 0); |
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return; |
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out_put: |
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of_node_put(pcictrl); |
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} |
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#else |
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static void __init efika_pcisetup(void) |
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{} |
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#endif |
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/* ------------------------------------------------------------------------ */ |
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/* Platform setup */ |
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/* ------------------------------------------------------------------------ */ |
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static void efika_show_cpuinfo(struct seq_file *m) |
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{ |
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struct device_node *root; |
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const char *revision; |
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const char *codegendescription; |
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const char *codegenvendor; |
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root = of_find_node_by_path("/"); |
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if (!root) |
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return; |
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revision = of_get_property(root, "revision", NULL); |
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codegendescription = of_get_property(root, "CODEGEN,description", NULL); |
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codegenvendor = of_get_property(root, "CODEGEN,vendor", NULL); |
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if (codegendescription) |
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seq_printf(m, "machine\t\t: %s\n", codegendescription); |
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else |
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seq_printf(m, "machine\t\t: Efika\n"); |
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if (revision) |
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seq_printf(m, "revision\t: %s\n", revision); |
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if (codegenvendor) |
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seq_printf(m, "vendor\t\t: %s\n", codegenvendor); |
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of_node_put(root); |
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} |
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#ifdef CONFIG_PM |
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static void efika_suspend_prepare(void __iomem *mbar) |
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{ |
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u8 pin = 4; /* GPIO_WKUP_4 (GPIO_PSC6_0 - IRDA_RX) */ |
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u8 level = 1; /* wakeup on high level */ |
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/* IOW. to wake it up, short pins 1 and 3 on IRDA connector */ |
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mpc52xx_set_wakeup_gpio(pin, level); |
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} |
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#endif |
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static void __init efika_setup_arch(void) |
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{ |
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rtas_initialize(); |
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/* Map important registers from the internal memory map */ |
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mpc52xx_map_common_devices(); |
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#ifdef CONFIG_PM |
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mpc52xx_suspend.board_suspend_prepare = efika_suspend_prepare; |
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mpc52xx_pm_init(); |
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#endif |
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if (ppc_md.progress) |
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ppc_md.progress("Linux/PPC " UTS_RELEASE " running on Efika ;-)\n", 0x0); |
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} |
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static int __init efika_probe(void) |
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{ |
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const char *model = of_get_property(of_root, "model", NULL); |
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if (model == NULL) |
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return 0; |
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if (strcmp(model, "EFIKA5K2")) |
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return 0; |
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DMA_MODE_READ = 0x44; |
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DMA_MODE_WRITE = 0x48; |
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pm_power_off = rtas_power_off; |
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return 1; |
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} |
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define_machine(efika) |
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{ |
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.name = EFIKA_PLATFORM_NAME, |
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.probe = efika_probe, |
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.setup_arch = efika_setup_arch, |
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.discover_phbs = efika_pcisetup, |
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.init = mpc52xx_declare_of_platform_devices, |
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.show_cpuinfo = efika_show_cpuinfo, |
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.init_IRQ = mpc52xx_init_irq, |
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.get_irq = mpc52xx_get_irq, |
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.restart = rtas_restart, |
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.halt = rtas_halt, |
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.set_rtc_time = rtas_set_rtc_time, |
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.get_rtc_time = rtas_get_rtc_time, |
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.progress = rtas_progress, |
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.get_boot_time = rtas_get_boot_time, |
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.calibrate_decr = generic_calibrate_decr, |
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#ifdef CONFIG_PCI |
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.phys_mem_access_prot = pci_phys_mem_access_prot, |
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#endif |
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}; |
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