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 struct irq_chip *chip = irq_desc_get_chip(desc); 60 int cascade_irq; 61 62 while ((cascade_irq = cpm2_get_irq()) >= 0) 63 generic_handle_irq(cascade_irq); 64 65 chip->irq_eoi(&desc->irq_data); 66 } 67 68 static void __init ksi8560_pic_init(void) 69 { 70 struct mpic *mpic; 71 struct resource r; 72 struct device_node *np; 73 #ifdef CONFIG_CPM2 74 int irq; 75 #endif 76 77 np = of_find_node_by_type(NULL, "open-pic"); 78 79 if (np == NULL) { 80 printk(KERN_ERR "Could not find open-pic node\n"); 81 return; 82 } 83 84 if (of_address_to_resource(np, 0, &r)) { 85 printk(KERN_ERR "Could not map mpic register space\n"); 86 of_node_put(np); 87 return; 88 } 89 90 mpic = mpic_alloc(np, r.start, 91 MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN, 92 0, 256, " OpenPIC "); 93 BUG_ON(mpic == NULL); 94 of_node_put(np); 95 96 mpic_init(mpic); 97 98 #ifdef CONFIG_CPM2 99 /* Setup CPM2 PIC */ 100 np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic"); 101 if (np == NULL) { 102 printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n"); 103 return; 104 } 105 irq = irq_of_parse_and_map(np, 0); 106 107 cpm2_pic_init(np); 108 of_node_put(np); 109 irq_set_chained_handler(irq, cpm2_cascade); 110 #endif 111 } 112 113 #ifdef CONFIG_CPM2 114 /* 115 * Setup I/O ports 116 */ 117 struct cpm_pin { 118 int port, pin, flags; 119 }; 120 121 static struct cpm_pin __initdata ksi8560_pins[] = { 122 /* SCC1 */ 123 {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 124 {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 125 {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 126 127 /* SCC2 */ 128 {3, 26, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 129 {3, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 130 {3, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 131 132 /* FCC1 */ 133 {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 134 {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 135 {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 136 {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 137 {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 138 {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 139 {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 140 {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 141 {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, 142 {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, 143 {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 144 {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 145 {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, 146 {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, 147 {2, 23, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK9 */ 148 {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK10 */ 149 150 }; 151 152 static void __init init_ioports(void) 153 { 154 int i; 155 156 for (i = 0; i < ARRAY_SIZE(ksi8560_pins); i++) { 157 struct cpm_pin *pin = &ksi8560_pins[i]; 158 cpm2_set_pin(pin->port, pin->pin, pin->flags); 159 } 160 161 cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX); 162 cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX); 163 cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX); 164 cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX); 165 cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK9, CPM_CLK_RX); 166 cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX); 167 } 168 #endif 169 170 /* 171 * Setup the architecture 172 */ 173 static void __init ksi8560_setup_arch(void) 174 { 175 struct device_node *cpld; 176 177 cpld = of_find_compatible_node(NULL, NULL, "emerson,KSI8560-cpld"); 178 if (cpld) 179 cpld_base = of_iomap(cpld, 0); 180 else 181 printk(KERN_ERR "Can't find CPLD in device tree\n"); 182 183 if (ppc_md.progress) 184 ppc_md.progress("ksi8560_setup_arch()", 0); 185 186 #ifdef CONFIG_CPM2 187 cpm2_reset(); 188 init_ioports(); 189 #endif 190 } 191 192 static void ksi8560_show_cpuinfo(struct seq_file *m) 193 { 194 uint pvid, svid, phid1; 195 196 pvid = mfspr(SPRN_PVR); 197 svid = mfspr(SPRN_SVR); 198 199 seq_printf(m, "Vendor\t\t: Emerson Network Power\n"); 200 seq_printf(m, "Board\t\t: KSI8560\n"); 201 202 if (cpld_base) { 203 seq_printf(m, "Hardware rev\t: %d\n", 204 in_8(cpld_base + KSI8560_CPLD_HVR)); 205 seq_printf(m, "CPLD rev\t: %d\n", 206 in_8(cpld_base + KSI8560_CPLD_PVR)); 207 } else 208 seq_printf(m, "Unknown Hardware and CPLD revs\n"); 209 210 seq_printf(m, "PVR\t\t: 0x%x\n", pvid); 211 seq_printf(m, "SVR\t\t: 0x%x\n", svid); 212 213 /* Display cpu Pll setting */ 214 phid1 = mfspr(SPRN_HID1); 215 seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f)); 216 } 217 218 static struct of_device_id __initdata of_bus_ids[] = { 219 { .type = "soc", }, 220 { .type = "simple-bus", }, 221 { .name = "cpm", }, 222 { .name = "localbus", }, 223 { .compatible = "gianfar", }, 224 {}, 225 }; 226 227 static int __init declare_of_platform_devices(void) 228 { 229 of_platform_bus_probe(NULL, of_bus_ids, NULL); 230 231 return 0; 232 } 233 machine_device_initcall(ksi8560, declare_of_platform_devices); 234 235 /* 236 * Called very early, device-tree isn't unflattened 237 */ 238 static int __init ksi8560_probe(void) 239 { 240 unsigned long root = of_get_flat_dt_root(); 241 242 return of_flat_dt_is_compatible(root, "emerson,KSI8560"); 243 } 244 245 define_machine(ksi8560) { 246 .name = "KSI8560", 247 .probe = ksi8560_probe, 248 .setup_arch = ksi8560_setup_arch, 249 .init_IRQ = ksi8560_pic_init, 250 .show_cpuinfo = ksi8560_show_cpuinfo, 251 .get_irq = mpic_get_irq, 252 .restart = machine_restart, 253 .calibrate_decr = generic_calibrate_decr, 254 }; 255