1 /* 2 * Keymile km82xx support 3 * Copyright 2008-2011 DENX Software Engineering GmbH 4 * Author: Heiko Schocher <hs@denx.de> 5 * 6 * based on code from: 7 * Copyright 2007 Freescale Semiconductor, Inc. 8 * Author: Scott Wood <scottwood@freescale.com> 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the 12 * Free Software Foundation; either version 2 of the License, or (at your 13 * option) any later version. 14 */ 15 16 #include <linux/init.h> 17 #include <linux/interrupt.h> 18 #include <linux/fsl_devices.h> 19 #include <linux/of_platform.h> 20 21 #include <asm/io.h> 22 #include <asm/cpm2.h> 23 #include <asm/udbg.h> 24 #include <asm/machdep.h> 25 #include <asm/time.h> 26 #include <asm/mpc8260.h> 27 #include <asm/prom.h> 28 29 #include <sysdev/fsl_soc.h> 30 #include <sysdev/cpm2_pic.h> 31 32 #include "pq2.h" 33 34 static void __init km82xx_pic_init(void) 35 { 36 struct device_node *np = of_find_compatible_node(NULL, NULL, 37 "fsl,pq2-pic"); 38 if (!np) { 39 printk(KERN_ERR "PIC init: can not find cpm-pic node\n"); 40 return; 41 } 42 43 cpm2_pic_init(np); 44 of_node_put(np); 45 } 46 47 struct cpm_pin { 48 int port, pin, flags; 49 }; 50 51 static __initdata struct cpm_pin km82xx_pins[] = { 52 53 /* SMC2 */ 54 {0, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 55 {0, 9, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 56 57 /* SCC1 */ 58 {2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 59 {2, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 60 {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 61 {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 62 63 /* SCC4 */ 64 {2, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 65 {2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 66 {2, 9, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 67 {2, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 68 {3, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 69 {3, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 70 71 /* FCC1 */ 72 {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 73 {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 74 {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 75 {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 76 {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 77 {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 78 {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 79 {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 80 {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, 81 {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, 82 {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 83 {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 84 {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, 85 {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, 86 87 {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 88 {2, 23, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 89 90 /* FCC2 */ 91 {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 92 {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 93 {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 94 {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 95 {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 96 {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 97 {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 98 {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 99 {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 100 {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 101 {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 102 {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 103 {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 104 {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 105 106 {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 107 {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 108 109 /* MDC */ 110 {0, 13, CPM_PIN_OUTPUT | CPM_PIN_GPIO}, 111 112 #if defined(CONFIG_I2C_CPM) 113 /* I2C */ 114 {3, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN}, 115 {3, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN}, 116 #endif 117 118 /* USB */ 119 {0, 10, CPM_PIN_OUTPUT | CPM_PIN_GPIO}, /* FULL_SPEED */ 120 {0, 11, CPM_PIN_OUTPUT | CPM_PIN_GPIO}, /*/SLAVE */ 121 {2, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* RXN */ 122 {2, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* RXP */ 123 {2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* /OE */ 124 {2, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* RXCLK */ 125 {3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* TXP */ 126 {3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* TXN */ 127 {3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* RXD */ 128 }; 129 130 static void __init init_ioports(void) 131 { 132 int i; 133 134 for (i = 0; i < ARRAY_SIZE(km82xx_pins); i++) { 135 const struct cpm_pin *pin = &km82xx_pins[i]; 136 cpm2_set_pin(pin->port, pin->pin, pin->flags); 137 } 138 139 cpm2_smc_clk_setup(CPM_CLK_SMC2, CPM_BRG8); 140 cpm2_clk_setup(CPM_CLK_SCC1, CPM_CLK11, CPM_CLK_RX); 141 cpm2_clk_setup(CPM_CLK_SCC1, CPM_CLK11, CPM_CLK_TX); 142 cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK5, CPM_CLK_RTX); 143 cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK7, CPM_CLK_RX); 144 cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK8, CPM_CLK_TX); 145 cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_RX); 146 cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK9, CPM_CLK_TX); 147 cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX); 148 cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX); 149 150 /* Force USB FULL SPEED bit to '1' */ 151 setbits32(&cpm2_immr->im_ioport.iop_pdata, 1 << (31 - 10)); 152 /* clear USB_SLAVE */ 153 clrbits32(&cpm2_immr->im_ioport.iop_pdata, 1 << (31 - 11)); 154 } 155 156 static void __init km82xx_setup_arch(void) 157 { 158 if (ppc_md.progress) 159 ppc_md.progress("km82xx_setup_arch()", 0); 160 161 cpm2_reset(); 162 163 /* When this is set, snooping CPM DMA from RAM causes 164 * machine checks. See erratum SIU18. 165 */ 166 clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP); 167 168 init_ioports(); 169 170 if (ppc_md.progress) 171 ppc_md.progress("km82xx_setup_arch(), finish", 0); 172 } 173 174 static __initdata struct of_device_id of_bus_ids[] = { 175 { .compatible = "simple-bus", }, 176 {}, 177 }; 178 179 static int __init declare_of_platform_devices(void) 180 { 181 of_platform_bus_probe(NULL, of_bus_ids, NULL); 182 183 return 0; 184 } 185 machine_device_initcall(km82xx, declare_of_platform_devices); 186 187 /* 188 * Called very early, device-tree isn't unflattened 189 */ 190 static int __init km82xx_probe(void) 191 { 192 unsigned long root = of_get_flat_dt_root(); 193 return of_flat_dt_is_compatible(root, "keymile,km82xx"); 194 } 195 196 define_machine(km82xx) 197 { 198 .name = "Keymile km82xx", 199 .probe = km82xx_probe, 200 .setup_arch = km82xx_setup_arch, 201 .init_IRQ = km82xx_pic_init, 202 .get_irq = cpm2_get_irq, 203 .calibrate_decr = generic_calibrate_decr, 204 .restart = pq2_restart, 205 .progress = udbg_progress, 206 }; 207