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-rw-r--r--arch/powerpc/platforms/chrp/setup.c595
1 files changed, 595 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c
new file mode 100644
index 000000000..c45435aa5
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/setup.c
@@ -0,0 +1,595 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 1995 Linus Torvalds
+ * Adapted from 'alpha' version by Gary Thomas
+ * Modified by Cort Dougan (cort@cs.nmt.edu)
+ */
+
+/*
+ * bootup setup stuff..
+ */
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/user.h>
+#include <linux/tty.h>
+#include <linux/major.h>
+#include <linux/interrupt.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <generated/utsrelease.h>
+#include <linux/adb.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/console.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/initrd.h>
+#include <linux/timer.h>
+
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+#include <asm/dma.h>
+#include <asm/machdep.h>
+#include <asm/irq.h>
+#include <asm/hydra.h>
+#include <asm/sections.h>
+#include <asm/time.h>
+#include <asm/i8259.h>
+#include <asm/mpic.h>
+#include <asm/rtas.h>
+#include <asm/xmon.h>
+
+#include "chrp.h"
+#include "gg2.h"
+
+void rtas_indicator_progress(char *, unsigned short);
+
+int _chrp_type;
+EXPORT_SYMBOL(_chrp_type);
+
+static struct mpic *chrp_mpic;
+
+/* Used for doing CHRP event-scans */
+DEFINE_PER_CPU(struct timer_list, heartbeat_timer);
+unsigned long event_scan_interval;
+
+extern unsigned long loops_per_jiffy;
+
+/* To be replaced by RTAS when available */
+static unsigned int __iomem *briq_SPOR;
+
+#ifdef CONFIG_SMP
+extern struct smp_ops_t chrp_smp_ops;
+#endif
+
+static const char *gg2_memtypes[4] = {
+ "FPM", "SDRAM", "EDO", "BEDO"
+};
+static const char *gg2_cachesizes[4] = {
+ "256 KB", "512 KB", "1 MB", "Reserved"
+};
+static const char *gg2_cachetypes[4] = {
+ "Asynchronous", "Reserved", "Flow-Through Synchronous",
+ "Pipelined Synchronous"
+};
+static const char *gg2_cachemodes[4] = {
+ "Disabled", "Write-Through", "Copy-Back", "Transparent Mode"
+};
+
+static const char *chrp_names[] = {
+ "Unknown",
+ "","","",
+ "Motorola",
+ "IBM or Longtrail",
+ "Genesi Pegasos",
+ "Total Impact Briq"
+};
+
+static void chrp_show_cpuinfo(struct seq_file *m)
+{
+ int i, sdramen;
+ unsigned int t;
+ struct device_node *root;
+ const char *model = "";
+
+ root = of_find_node_by_path("/");
+ if (root)
+ model = of_get_property(root, "model", NULL);
+ seq_printf(m, "machine\t\t: CHRP %s\n", model);
+
+ /* longtrail (goldengate) stuff */
+ if (model && !strncmp(model, "IBM,LongTrail", 13)) {
+ /* VLSI VAS96011/12 `Golden Gate 2' */
+ /* Memory banks */
+ sdramen = (in_le32(gg2_pci_config_base + GG2_PCI_DRAM_CTRL)
+ >>31) & 1;
+ for (i = 0; i < (sdramen ? 4 : 6); i++) {
+ t = in_le32(gg2_pci_config_base+
+ GG2_PCI_DRAM_BANK0+
+ i*4);
+ if (!(t & 1))
+ continue;
+ switch ((t>>8) & 0x1f) {
+ case 0x1f:
+ model = "4 MB";
+ break;
+ case 0x1e:
+ model = "8 MB";
+ break;
+ case 0x1c:
+ model = "16 MB";
+ break;
+ case 0x18:
+ model = "32 MB";
+ break;
+ case 0x10:
+ model = "64 MB";
+ break;
+ case 0x00:
+ model = "128 MB";
+ break;
+ default:
+ model = "Reserved";
+ break;
+ }
+ seq_printf(m, "memory bank %d\t: %s %s\n", i, model,
+ gg2_memtypes[sdramen ? 1 : ((t>>1) & 3)]);
+ }
+ /* L2 cache */
+ t = in_le32(gg2_pci_config_base+GG2_PCI_CC_CTRL);
+ seq_printf(m, "board l2\t: %s %s (%s)\n",
+ gg2_cachesizes[(t>>7) & 3],
+ gg2_cachetypes[(t>>2) & 3],
+ gg2_cachemodes[t & 3]);
+ }
+ of_node_put(root);
+}
+
+/*
+ * Fixes for the National Semiconductor PC78308VUL SuperI/O
+ *
+ * Some versions of Open Firmware incorrectly initialize the IRQ settings
+ * for keyboard and mouse
+ */
+static inline void __init sio_write(u8 val, u8 index)
+{
+ outb(index, 0x15c);
+ outb(val, 0x15d);
+}
+
+static inline u8 __init sio_read(u8 index)
+{
+ outb(index, 0x15c);
+ return inb(0x15d);
+}
+
+static void __init sio_fixup_irq(const char *name, u8 device, u8 level,
+ u8 type)
+{
+ u8 level0, type0, active;
+
+ /* select logical device */
+ sio_write(device, 0x07);
+ active = sio_read(0x30);
+ level0 = sio_read(0x70);
+ type0 = sio_read(0x71);
+ if (level0 != level || type0 != type || !active) {
+ printk(KERN_WARNING "sio: %s irq level %d, type %d, %sactive: "
+ "remapping to level %d, type %d, active\n",
+ name, level0, type0, !active ? "in" : "", level, type);
+ sio_write(0x01, 0x30);
+ sio_write(level, 0x70);
+ sio_write(type, 0x71);
+ }
+}
+
+static void __init sio_init(void)
+{
+ struct device_node *root;
+ const char *model;
+
+ root = of_find_node_by_path("/");
+ if (!root)
+ return;
+
+ model = of_get_property(root, "model", NULL);
+ if (model && !strncmp(model, "IBM,LongTrail", 13)) {
+ /* logical device 0 (KBC/Keyboard) */
+ sio_fixup_irq("keyboard", 0, 1, 2);
+ /* select logical device 1 (KBC/Mouse) */
+ sio_fixup_irq("mouse", 1, 12, 2);
+ }
+
+ of_node_put(root);
+}
+
+
+static void __init pegasos_set_l2cr(void)
+{
+ struct device_node *np;
+
+ /* On Pegasos, enable the l2 cache if needed, as the OF forgets it */
+ if (_chrp_type != _CHRP_Pegasos)
+ return;
+
+ /* Enable L2 cache if needed */
+ np = of_find_node_by_type(NULL, "cpu");
+ if (np != NULL) {
+ const unsigned int *l2cr = of_get_property(np, "l2cr", NULL);
+ if (l2cr == NULL) {
+ printk ("Pegasos l2cr : no cpu l2cr property found\n");
+ goto out;
+ }
+ if (!((*l2cr) & 0x80000000)) {
+ printk ("Pegasos l2cr : L2 cache was not active, "
+ "activating\n");
+ _set_L2CR(0);
+ _set_L2CR((*l2cr) | 0x80000000);
+ }
+ }
+out:
+ of_node_put(np);
+}
+
+static void __noreturn briq_restart(char *cmd)
+{
+ local_irq_disable();
+ if (briq_SPOR)
+ out_be32(briq_SPOR, 0);
+ for(;;);
+}
+
+/*
+ * Per default, input/output-device points to the keyboard/screen
+ * If no card is installed, the built-in serial port is used as a fallback.
+ * But unfortunately, the firmware does not connect /chosen/{stdin,stdout}
+ * the the built-in serial node. Instead, a /failsafe node is created.
+ */
+static __init void chrp_init(void)
+{
+ struct device_node *node;
+ const char *property;
+
+ if (strstr(boot_command_line, "console="))
+ return;
+ /* find the boot console from /chosen/stdout */
+ if (!of_chosen)
+ return;
+ node = of_find_node_by_path("/");
+ if (!node)
+ return;
+ property = of_get_property(node, "model", NULL);
+ if (!property)
+ goto out_put;
+ if (strcmp(property, "Pegasos2"))
+ goto out_put;
+ /* this is a Pegasos2 */
+ property = of_get_property(of_chosen, "linux,stdout-path", NULL);
+ if (!property)
+ goto out_put;
+ of_node_put(node);
+ node = of_find_node_by_path(property);
+ if (!node)
+ return;
+ if (!of_node_is_type(node, "serial"))
+ goto out_put;
+ /*
+ * The 9pin connector is either /failsafe
+ * or /pci@80000000/isa@C/serial@i2F8
+ * The optional graphics card has also type 'serial' in VGA mode.
+ */
+ if (of_node_name_eq(node, "failsafe") || of_node_name_eq(node, "serial"))
+ add_preferred_console("ttyS", 0, NULL);
+out_put:
+ of_node_put(node);
+}
+
+static void __init chrp_setup_arch(void)
+{
+ struct device_node *root = of_find_node_by_path("/");
+ const char *machine = NULL;
+
+ /* init to some ~sane value until calibrate_delay() runs */
+ loops_per_jiffy = 50000000/HZ;
+
+ if (root)
+ machine = of_get_property(root, "model", NULL);
+ if (machine && strncmp(machine, "Pegasos", 7) == 0) {
+ _chrp_type = _CHRP_Pegasos;
+ } else if (machine && strncmp(machine, "IBM", 3) == 0) {
+ _chrp_type = _CHRP_IBM;
+ } else if (machine && strncmp(machine, "MOT", 3) == 0) {
+ _chrp_type = _CHRP_Motorola;
+ } else if (machine && strncmp(machine, "TotalImpact,BRIQ-1", 18) == 0) {
+ _chrp_type = _CHRP_briq;
+ /* Map the SPOR register on briq and change the restart hook */
+ briq_SPOR = ioremap(0xff0000e8, 4);
+ ppc_md.restart = briq_restart;
+ } else {
+ /* Let's assume it is an IBM chrp if all else fails */
+ _chrp_type = _CHRP_IBM;
+ }
+ of_node_put(root);
+ printk("chrp type = %x [%s]\n", _chrp_type, chrp_names[_chrp_type]);
+
+ rtas_initialize();
+ if (rtas_token("display-character") >= 0)
+ ppc_md.progress = rtas_progress;
+
+ /* use RTAS time-of-day routines if available */
+ if (rtas_token("get-time-of-day") != RTAS_UNKNOWN_SERVICE) {
+ ppc_md.get_boot_time = rtas_get_boot_time;
+ ppc_md.get_rtc_time = rtas_get_rtc_time;
+ ppc_md.set_rtc_time = rtas_set_rtc_time;
+ }
+
+ /* On pegasos, enable the L2 cache if not already done by OF */
+ pegasos_set_l2cr();
+
+ /* Lookup PCI host bridges */
+ chrp_find_bridges();
+
+ /*
+ * Temporary fixes for PCI devices.
+ * -- Geert
+ */
+ hydra_init(); /* Mac I/O */
+
+ /*
+ * Fix the Super I/O configuration
+ */
+ sio_init();
+
+ pci_create_OF_bus_map();
+
+ /*
+ * Print the banner, then scroll down so boot progress
+ * can be printed. -- Cort
+ */
+ if (ppc_md.progress) ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0x0);
+}
+
+static void chrp_8259_cascade(struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ unsigned int cascade_irq = i8259_irq();
+
+ if (cascade_irq)
+ generic_handle_irq(cascade_irq);
+
+ chip->irq_eoi(&desc->irq_data);
+}
+
+/*
+ * Finds the open-pic node and sets up the mpic driver.
+ */
+static void __init chrp_find_openpic(void)
+{
+ struct device_node *np, *root;
+ int len, i, j;
+ int isu_size;
+ const unsigned int *iranges, *opprop = NULL;
+ int oplen = 0;
+ unsigned long opaddr;
+ int na = 1;
+
+ np = of_find_node_by_type(NULL, "open-pic");
+ if (np == NULL)
+ return;
+ root = of_find_node_by_path("/");
+ if (root) {
+ opprop = of_get_property(root, "platform-open-pic", &oplen);
+ na = of_n_addr_cells(root);
+ }
+ if (opprop && oplen >= na * sizeof(unsigned int)) {
+ opaddr = opprop[na-1]; /* assume 32-bit */
+ oplen /= na * sizeof(unsigned int);
+ } else {
+ struct resource r;
+ if (of_address_to_resource(np, 0, &r)) {
+ goto bail;
+ }
+ opaddr = r.start;
+ oplen = 0;
+ }
+
+ printk(KERN_INFO "OpenPIC at %lx\n", opaddr);
+
+ iranges = of_get_property(np, "interrupt-ranges", &len);
+ if (iranges == NULL)
+ len = 0; /* non-distributed mpic */
+ else
+ len /= 2 * sizeof(unsigned int);
+
+ /*
+ * The first pair of cells in interrupt-ranges refers to the
+ * IDU; subsequent pairs refer to the ISUs.
+ */
+ if (oplen < len) {
+ printk(KERN_ERR "Insufficient addresses for distributed"
+ " OpenPIC (%d < %d)\n", oplen, len);
+ len = oplen;
+ }
+
+ isu_size = 0;
+ if (len > 0 && iranges[1] != 0) {
+ printk(KERN_INFO "OpenPIC irqs %d..%d in IDU\n",
+ iranges[0], iranges[0] + iranges[1] - 1);
+ }
+ if (len > 1)
+ isu_size = iranges[3];
+
+ chrp_mpic = mpic_alloc(np, opaddr, MPIC_NO_RESET,
+ isu_size, 0, " MPIC ");
+ if (chrp_mpic == NULL) {
+ printk(KERN_ERR "Failed to allocate MPIC structure\n");
+ goto bail;
+ }
+ j = na - 1;
+ for (i = 1; i < len; ++i) {
+ iranges += 2;
+ j += na;
+ printk(KERN_INFO "OpenPIC irqs %d..%d in ISU at %x\n",
+ iranges[0], iranges[0] + iranges[1] - 1,
+ opprop[j]);
+ mpic_assign_isu(chrp_mpic, i - 1, opprop[j]);
+ }
+
+ mpic_init(chrp_mpic);
+ ppc_md.get_irq = mpic_get_irq;
+ bail:
+ of_node_put(root);
+ of_node_put(np);
+}
+
+static void __init chrp_find_8259(void)
+{
+ struct device_node *np, *pic = NULL;
+ unsigned long chrp_int_ack = 0;
+ unsigned int cascade_irq;
+
+ /* Look for cascade */
+ for_each_node_by_type(np, "interrupt-controller")
+ if (of_device_is_compatible(np, "chrp,iic")) {
+ pic = np;
+ break;
+ }
+ /* Ok, 8259 wasn't found. We need to handle the case where
+ * we have a pegasos that claims to be chrp but doesn't have
+ * a proper interrupt tree
+ */
+ if (pic == NULL && chrp_mpic != NULL) {
+ printk(KERN_ERR "i8259: Not found in device-tree"
+ " assuming no legacy interrupts\n");
+ return;
+ }
+
+ /* Look for intack. In a perfect world, we would look for it on
+ * the ISA bus that holds the 8259 but heh... Works that way. If
+ * we ever see a problem, we can try to re-use the pSeries code here.
+ * Also, Pegasos-type platforms don't have a proper node to start
+ * from anyway
+ */
+ for_each_node_by_name(np, "pci") {
+ const unsigned int *addrp = of_get_property(np,
+ "8259-interrupt-acknowledge", NULL);
+
+ if (addrp == NULL)
+ continue;
+ chrp_int_ack = addrp[of_n_addr_cells(np)-1];
+ break;
+ }
+ of_node_put(np);
+ if (np == NULL)
+ printk(KERN_WARNING "Cannot find PCI interrupt acknowledge"
+ " address, polling\n");
+
+ i8259_init(pic, chrp_int_ack);
+ if (ppc_md.get_irq == NULL) {
+ ppc_md.get_irq = i8259_irq;
+ irq_set_default_host(i8259_get_host());
+ }
+ if (chrp_mpic != NULL) {
+ cascade_irq = irq_of_parse_and_map(pic, 0);
+ if (!cascade_irq)
+ printk(KERN_ERR "i8259: failed to map cascade irq\n");
+ else
+ irq_set_chained_handler(cascade_irq,
+ chrp_8259_cascade);
+ }
+}
+
+static void __init chrp_init_IRQ(void)
+{
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_XMON)
+ struct device_node *kbd;
+#endif
+ chrp_find_openpic();
+ chrp_find_8259();
+
+#ifdef CONFIG_SMP
+ /* Pegasos has no MPIC, those ops would make it crash. It might be an
+ * option to move setting them to after we probe the PIC though
+ */
+ if (chrp_mpic != NULL)
+ smp_ops = &chrp_smp_ops;
+#endif /* CONFIG_SMP */
+
+ if (_chrp_type == _CHRP_Pegasos)
+ ppc_md.get_irq = i8259_irq;
+
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_XMON)
+ /* see if there is a keyboard in the device tree
+ with a parent of type "adb" */
+ for_each_node_by_name(kbd, "keyboard")
+ if (of_node_is_type(kbd->parent, "adb"))
+ break;
+ of_node_put(kbd);
+ if (kbd) {
+ if (request_irq(HYDRA_INT_ADB_NMI, xmon_irq, 0, "XMON break",
+ NULL))
+ pr_err("Failed to register XMON break interrupt\n");
+ }
+#endif
+}
+
+static void __init
+chrp_init2(void)
+{
+#if IS_ENABLED(CONFIG_NVRAM)
+ chrp_nvram_init();
+#endif
+
+ request_region(0x20,0x20,"pic1");
+ request_region(0xa0,0x20,"pic2");
+ request_region(0x00,0x20,"dma1");
+ request_region(0x40,0x20,"timer");
+ request_region(0x80,0x10,"dma page reg");
+ request_region(0xc0,0x20,"dma2");
+
+ if (ppc_md.progress)
+ ppc_md.progress(" Have fun! ", 0x7777);
+}
+
+static int __init chrp_probe(void)
+{
+ const char *dtype = of_get_flat_dt_prop(of_get_flat_dt_root(),
+ "device_type", NULL);
+ if (dtype == NULL)
+ return 0;
+ if (strcmp(dtype, "chrp"))
+ return 0;
+
+ DMA_MODE_READ = 0x44;
+ DMA_MODE_WRITE = 0x48;
+
+ pm_power_off = rtas_power_off;
+
+ chrp_init();
+
+ return 1;
+}
+
+define_machine(chrp) {
+ .name = "CHRP",
+ .probe = chrp_probe,
+ .setup_arch = chrp_setup_arch,
+ .init = chrp_init2,
+ .show_cpuinfo = chrp_show_cpuinfo,
+ .init_IRQ = chrp_init_IRQ,
+ .restart = rtas_restart,
+ .halt = rtas_halt,
+ .time_init = chrp_time_init,
+ .set_rtc_time = chrp_set_rtc_time,
+ .get_rtc_time = chrp_get_rtc_time,
+ .calibrate_decr = generic_calibrate_decr,
+ .phys_mem_access_prot = pci_phys_mem_access_prot,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-09 20:15:05 +0000