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