release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/platforms/85xx/ksi8560.c

   1 /*
   2  * Board setup routines for the Emerson KSI8560
   3  *
   4  * Author: Alexandr Smirnov <asmirnov@ru.mvista.com>
   5  *
   6  * Based on mpc85xx_ads.c maintained by Kumar Gala
   7  *
   8  * 2008 (c) MontaVista, Software, Inc.  This file is licensed under
   9  * the terms of the GNU General Public License version 2.  This program
  10  * is licensed "as is" without any warranty of any kind, whether express
  11  * or implied.
  12  *
  13  */
  14
  15 #include <linux/stddef.h>
  16 #include <linux/kernel.h>
  17 #include <linux/pci.h>
  18 #include <linux/kdev_t.h>
  19 #include <linux/delay.h>
  20 #include <linux/seq_file.h>
  21 #include <linux/of_platform.h>
  22
  23 #include <asm/system.h>
  24 #include <asm/time.h>
  25 #include <asm/machdep.h>
  26 #include <asm/pci-bridge.h>
  27 #include <asm/mpic.h>
  28 #include <mm/mmu_decl.h>
  29 #include <asm/udbg.h>
  30 #include <asm/prom.h>
  31
  32 #include <sysdev/fsl_soc.h>
  33 #include <sysdev/fsl_pci.h>
  34
  35 #include <asm/cpm2.h>
  36 #include <sysdev/cpm2_pic.h>
  37
  38
  39 #define KSI8560_CPLD_HVR                0x04 /* Hardware Version Register */
  40 #define KSI8560_CPLD_PVR                0x08 /* PLD Version Register */
  41 #define KSI8560_CPLD_RCR1               0x30 /* Reset Command Register 1 */
  42
  43 #define KSI8560_CPLD_RCR1_CPUHR         0x80 /* CPU Hard Reset */
  44
  45 static void __iomem *cpld_base = NULL;
  46
  47 static void machine_restart(char *cmd)
  48 {
  49         if (cpld_base)
  50                 out_8(cpld_base + KSI8560_CPLD_RCR1, KSI8560_CPLD_RCR1_CPUHR);
  51         else
  52                 printk(KERN_ERR "Can't find CPLD base, hang forever\n");
  53
  54         for (;;);
  55 }
  56
  57 static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
  58 {
  59         int cascade_irq;
  60
  61         while ((cascade_irq = cpm2_get_irq()) >= 0)
  62                 generic_handle_irq(cascade_irq);
  63
  64         desc->chip->eoi(irq);
  65 }
  66
  67 static void __init ksi8560_pic_init(void)
  68 {
  69         struct mpic *mpic;
  70         struct resource r;
  71         struct device_node *np;
  72 #ifdef CONFIG_CPM2
  73         int irq;
  74 #endif
  75
  76         np = of_find_node_by_type(NULL, "open-pic");
  77
  78         if (np == NULL) {
  79                 printk(KERN_ERR "Could not find open-pic node\n");
  80                 return;
  81         }
  82
  83         if (of_address_to_resource(np, 0, &r)) {
  84                 printk(KERN_ERR "Could not map mpic register space\n");
  85                 of_node_put(np);
  86                 return;
  87         }
  88
  89         mpic = mpic_alloc(np, r.start,
  90                         MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
  91                         0, 256, " OpenPIC  ");
  92         BUG_ON(mpic == NULL);
  93         of_node_put(np);
  94
  95         mpic_init(mpic);
  96
  97 #ifdef CONFIG_CPM2
  98         /* Setup CPM2 PIC */
  99         np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
 100         if (np == NULL) {
 101                 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
 102                 return;
 103         }
 104         irq = irq_of_parse_and_map(np, 0);
 105
 106         cpm2_pic_init(np);
 107         of_node_put(np);
 108         set_irq_chained_handler(irq, cpm2_cascade);
 109 #endif
 110 }
 111
 112 #ifdef CONFIG_CPM2
 113 /*
 114  * Setup I/O ports
 115  */
 116 struct cpm_pin {
 117         int port, pin, flags;
 118 };
 119
 120 static struct cpm_pin __initdata ksi8560_pins[] = {
 121         /* SCC1 */
 122         {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 123         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 124         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 125
 126         /* SCC2 */
 127         {3, 26, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 128         {3, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 129         {3, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 130
 131         /* FCC1 */
 132         {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 133         {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 134         {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 135         {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 136         {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 137         {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 138         {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 139         {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 140         {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 141         {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 142         {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 143         {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 144         {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 145         {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 146         {2, 23, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK9 */
 147         {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK10 */
 148
 149 };
 150
 151 static void __init init_ioports(void)
 152 {
 153         int i;
 154
 155         for (i = 0; i < ARRAY_SIZE(ksi8560_pins); i++) {
 156                 struct cpm_pin *pin = &ksi8560_pins[i];
 157                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
 158         }
 159
 160         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
 161         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
 162         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
 163         cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
 164         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK9, CPM_CLK_RX);
 165         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
 166 }
 167 #endif
 168
 169 /*
 170  * Setup the architecture
 171  */
 172 static void __init ksi8560_setup_arch(void)
 173 {
 174         struct device_node *cpld;
 175
 176         cpld = of_find_compatible_node(NULL, NULL, "emerson,KSI8560-cpld");
 177         if (cpld)
 178                 cpld_base = of_iomap(cpld, 0);
 179         else
 180                 printk(KERN_ERR "Can't find CPLD in device tree\n");
 181
 182         if (ppc_md.progress)
 183                 ppc_md.progress("ksi8560_setup_arch()", 0);
 184
 185 #ifdef CONFIG_CPM2
 186         cpm2_reset();
 187         init_ioports();
 188 #endif
 189 }
 190
 191 static void ksi8560_show_cpuinfo(struct seq_file *m)
 192 {
 193         uint pvid, svid, phid1;
 194
 195         pvid = mfspr(SPRN_PVR);
 196         svid = mfspr(SPRN_SVR);
 197
 198         seq_printf(m, "Vendor\t\t: Emerson Network Power\n");
 199         seq_printf(m, "Board\t\t: KSI8560\n");
 200
 201         if (cpld_base) {
 202                 seq_printf(m, "Hardware rev\t: %d\n",
 203                                         in_8(cpld_base + KSI8560_CPLD_HVR));
 204                 seq_printf(m, "CPLD rev\t: %d\n",
 205                                         in_8(cpld_base + KSI8560_CPLD_PVR));
 206         } else
 207                 seq_printf(m, "Unknown Hardware and CPLD revs\n");
 208
 209         seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
 210         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
 211
 212         /* Display cpu Pll setting */
 213         phid1 = mfspr(SPRN_HID1);
 214         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
 215 }
 216
 217 static struct of_device_id __initdata of_bus_ids[] = {
 218         { .type = "soc", },
 219         { .type = "simple-bus", },
 220         { .name = "cpm", },
 221         { .name = "localbus", },
 222         { .compatible = "gianfar", },
 223         {},
 224 };
 225
 226 static int __init declare_of_platform_devices(void)
 227 {
 228         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 229
 230         return 0;
 231 }
 232 machine_device_initcall(ksi8560, declare_of_platform_devices);
 233
 234 /*
 235  * Called very early, device-tree isn't unflattened
 236  */
 237 static int __init ksi8560_probe(void)
 238 {
 239         unsigned long root = of_get_flat_dt_root();
 240
 241         return of_flat_dt_is_compatible(root, "emerson,KSI8560");
 242 }
 243
 244 define_machine(ksi8560) {
 245         .name                   = "KSI8560",
 246         .probe                  = ksi8560_probe,
 247         .setup_arch             = ksi8560_setup_arch,
 248         .init_IRQ               = ksi8560_pic_init,
 249         .show_cpuinfo           = ksi8560_show_cpuinfo,
 250         .get_irq                = mpic_get_irq,
 251         .restart                = machine_restart,
 252         .calibrate_decr         = generic_calibrate_decr,
 253 };