1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Keymile km82xx support 4 * Copyright 2008-2011 DENX Software Engineering GmbH 5 * Author: Heiko Schocher <hs@denx.de> 6 * 7 * based on code from: 8 * Copyright 2007 Freescale Semiconductor, Inc. 9 * Author: Scott Wood <scottwood@freescale.com> 10 */ 11 12 #include <linux/init.h> 13 #include <linux/interrupt.h> 14 #include <linux/fsl_devices.h> 15 #include <linux/of_platform.h> 16 17 #include <linux/io.h> 18 #include <asm/cpm2.h> 19 #include <asm/udbg.h> 20 #include <asm/machdep.h> 21 #include <linux/time.h> 22 #include <asm/mpc8260.h> 23 24 #include <sysdev/fsl_soc.h> 25 #include <sysdev/cpm2_pic.h> 26 27 #include "pq2.h" 28 29 static void __init km82xx_pic_init(void) 30 { 31 struct device_node *np = of_find_compatible_node(NULL, NULL, 32 "fsl,pq2-pic"); 33 if (!np) { 34 pr_err("PIC init: can not find cpm-pic node\n"); 35 return; 36 } 37 38 cpm2_pic_init(np); 39 of_node_put(np); 40 } 41 42 struct cpm_pin { 43 int port, pin, flags; 44 }; 45 46 static __initdata struct cpm_pin km82xx_pins[] = { 47 /* SMC1 */ 48 {2, 4, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 49 {2, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 50 51 /* SMC2 */ 52 {0, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 53 {0, 9, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 54 55 /* SCC1 */ 56 {2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 57 {2, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 58 {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 59 {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 60 61 /* SCC4 */ 62 {2, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 63 {2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 64 {2, 9, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 65 {2, 8, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 66 {3, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 67 {3, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 68 69 /* FCC1 */ 70 {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 71 {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 72 {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 73 {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 74 {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 75 {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 76 {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 77 {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 78 {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, 79 {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, 80 {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 81 {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 82 {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, 83 {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, 84 85 {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 86 {2, 23, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 87 88 /* FCC2 */ 89 {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 90 {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 91 {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 92 {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 93 {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 94 {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 95 {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 96 {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 97 {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 98 {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 99 {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 100 {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 101 {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 102 {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, 103 104 {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 105 {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, 106 107 /* MDC */ 108 {0, 13, CPM_PIN_OUTPUT | CPM_PIN_GPIO}, 109 110 #if defined(CONFIG_I2C_CPM) 111 /* I2C */ 112 {3, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN}, 113 {3, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_OPENDRAIN}, 114 #endif 115 116 /* USB */ 117 {0, 10, CPM_PIN_OUTPUT | CPM_PIN_GPIO}, /* FULL_SPEED */ 118 {0, 11, CPM_PIN_OUTPUT | CPM_PIN_GPIO}, /*/SLAVE */ 119 {2, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* RXN */ 120 {2, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* RXP */ 121 {2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* /OE */ 122 {2, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* RXCLK */ 123 {3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* TXP */ 124 {3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY}, /* TXN */ 125 {3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* RXD */ 126 127 /* SPI */ 128 {3, 16, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_MISO PD16 */ 129 {3, 17, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_MOSI PD17 */ 130 {3, 18, CPM_PIN_INPUT | CPM_PIN_SECONDARY},/* SPI_CLK PD18 */ 131 }; 132 133 static void __init init_ioports(void) 134 { 135 int i; 136 137 for (i = 0; i < ARRAY_SIZE(km82xx_pins); i++) { 138 const struct cpm_pin *pin = &km82xx_pins[i]; 139 cpm2_set_pin(pin->port, pin->pin, pin->flags); 140 } 141 142 cpm2_smc_clk_setup(CPM_CLK_SMC2, CPM_BRG8); 143 cpm2_smc_clk_setup(CPM_CLK_SMC1, CPM_BRG7); 144 cpm2_clk_setup(CPM_CLK_SCC1, CPM_CLK11, CPM_CLK_RX); 145 cpm2_clk_setup(CPM_CLK_SCC1, CPM_CLK11, CPM_CLK_TX); 146 cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK5, CPM_CLK_RTX); 147 cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK7, CPM_CLK_RX); 148 cpm2_clk_setup(CPM_CLK_SCC4, CPM_CLK8, CPM_CLK_TX); 149 cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_RX); 150 cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK9, CPM_CLK_TX); 151 cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX); 152 cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX); 153 154 /* Force USB FULL SPEED bit to '1' */ 155 setbits32(&cpm2_immr->im_ioport.iop_pdata, 1 << (31 - 10)); 156 /* clear USB_SLAVE */ 157 clrbits32(&cpm2_immr->im_ioport.iop_pdata, 1 << (31 - 11)); 158 } 159 160 static void __init km82xx_setup_arch(void) 161 { 162 if (ppc_md.progress) 163 ppc_md.progress("km82xx_setup_arch()", 0); 164 165 cpm2_reset(); 166 167 /* When this is set, snooping CPM DMA from RAM causes 168 * machine checks. See erratum SIU18. 169 */ 170 clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP); 171 172 init_ioports(); 173 174 if (ppc_md.progress) 175 ppc_md.progress("km82xx_setup_arch(), finish", 0); 176 } 177 178 static const struct of_device_id of_bus_ids[] __initconst = { 179 { .compatible = "simple-bus", }, 180 {}, 181 }; 182 183 static int __init declare_of_platform_devices(void) 184 { 185 of_platform_bus_probe(NULL, of_bus_ids, NULL); 186 187 return 0; 188 } 189 machine_device_initcall(km82xx, declare_of_platform_devices); 190 191 /* 192 * Called very early, device-tree isn't unflattened 193 */ 194 static int __init km82xx_probe(void) 195 { 196 return of_machine_is_compatible("keymile,km82xx"); 197 } 198 199 define_machine(km82xx) 200 { 201 .name = "Keymile km82xx", 202 .probe = km82xx_probe, 203 .setup_arch = km82xx_setup_arch, 204 .init_IRQ = km82xx_pic_init, 205 .get_irq = cpm2_get_irq, 206 .calibrate_decr = generic_calibrate_decr, 207 .restart = pq2_restart, 208 .progress = udbg_progress, 209 }; 210