1/* 2 * Platform setup for the Freescale mpc885ads board 3 * 4 * Vitaly Bordug <vbordug@ru.mvista.com> 5 * 6 * Copyright 2005 MontaVista Software Inc. 7 * 8 * Heavily modified by Scott Wood <scottwood@freescale.com> 9 * Copyright 2007 Freescale Semiconductor, Inc. 10 * 11 * This file is licensed under the terms of the GNU General Public License 12 * version 2. This program is licensed "as is" without any warranty of any 13 * kind, whether express or implied. 14 */ 15 16#include <linux/init.h> 17#include <linux/module.h> 18#include <linux/param.h> 19#include <linux/string.h> 20#include <linux/ioport.h> 21#include <linux/device.h> 22#include <linux/delay.h> 23 24#include <linux/fs_enet_pd.h> 25#include <linux/fs_uart_pd.h> 26#include <linux/fsl_devices.h> 27#include <linux/mii.h> 28#include <linux/of_platform.h> 29 30#include <asm/delay.h> 31#include <asm/io.h> 32#include <asm/machdep.h> 33#include <asm/page.h> 34#include <asm/processor.h> 35#include <asm/system.h> 36#include <asm/time.h> 37#include <asm/mpc8xx.h> 38#include <asm/8xx_immap.h> 39#include <asm/cpm1.h> 40#include <asm/fs_pd.h> 41#include <asm/udbg.h> 42 43#include "mpc885ads.h" 44#include "mpc8xx.h" 45 46static u32 __iomem *bcsr, *bcsr5; 47 48#ifdef CONFIG_PCMCIA_M8XX 49static void pcmcia_hw_setup(int slot, int enable) 50{ 51 if (enable) 52 clrbits32(&bcsr[1], BCSR1_PCCEN); 53 else 54 setbits32(&bcsr[1], BCSR1_PCCEN); 55} 56 57static int pcmcia_set_voltage(int slot, int vcc, int vpp) 58{ 59 u32 reg = 0; 60 61 switch (vcc) { 62 case 0: 63 break; 64 case 33: 65 reg |= BCSR1_PCCVCC0; 66 break; 67 case 50: 68 reg |= BCSR1_PCCVCC1; 69 break; 70 default: 71 return 1; 72 } 73 74 switch (vpp) { 75 case 0: 76 break; 77 case 33: 78 case 50: 79 if (vcc == vpp) 80 reg |= BCSR1_PCCVPP1; 81 else 82 return 1; 83 break; 84 case 120: 85 if ((vcc == 33) || (vcc == 50)) 86 reg |= BCSR1_PCCVPP0; 87 else 88 return 1; 89 default: 90 return 1; 91 } 92 93 /* first, turn off all power */ 94 clrbits32(&bcsr[1], 0x00610000); 95 96 /* enable new powersettings */ 97 setbits32(&bcsr[1], reg); 98 99 return 0; 100} 101#endif 102 103struct cpm_pin { 104 int port, pin, flags; 105}; 106 107static struct cpm_pin mpc885ads_pins[] = { 108 /* SMC1 */ 109 {CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */ 110 {CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */ 111 112 /* SMC2 */ 113#ifndef CONFIG_MPC8xx_SECOND_ETH_FEC2 114 {CPM_PORTE, 21, CPM_PIN_INPUT}, /* RX */ 115 {CPM_PORTE, 20, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */ 116#endif 117 118 /* SCC3 */ 119 {CPM_PORTA, 9, CPM_PIN_INPUT}, /* RX */ 120 {CPM_PORTA, 8, CPM_PIN_INPUT}, /* TX */ 121 {CPM_PORTC, 4, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* RENA */ 122 {CPM_PORTC, 5, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CLSN */ 123 {CPM_PORTE, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TENA */ 124 {CPM_PORTE, 17, CPM_PIN_INPUT}, /* CLK5 */ 125 {CPM_PORTE, 16, CPM_PIN_INPUT}, /* CLK6 */ 126 127 /* MII1 */ 128 {CPM_PORTA, 0, CPM_PIN_INPUT}, 129 {CPM_PORTA, 1, CPM_PIN_INPUT}, 130 {CPM_PORTA, 2, CPM_PIN_INPUT}, 131 {CPM_PORTA, 3, CPM_PIN_INPUT}, 132 {CPM_PORTA, 4, CPM_PIN_OUTPUT}, 133 {CPM_PORTA, 10, CPM_PIN_OUTPUT}, 134 {CPM_PORTA, 11, CPM_PIN_OUTPUT}, 135 {CPM_PORTB, 19, CPM_PIN_INPUT}, 136 {CPM_PORTB, 31, CPM_PIN_INPUT}, 137 {CPM_PORTC, 12, CPM_PIN_INPUT}, 138 {CPM_PORTC, 13, CPM_PIN_INPUT}, 139 {CPM_PORTE, 30, CPM_PIN_OUTPUT}, 140 {CPM_PORTE, 31, CPM_PIN_OUTPUT}, 141 142 /* MII2 */ 143#ifdef CONFIG_MPC8xx_SECOND_ETH_FEC2 144 {CPM_PORTE, 14, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 145 {CPM_PORTE, 15, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 146 {CPM_PORTE, 16, CPM_PIN_OUTPUT}, 147 {CPM_PORTE, 17, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 148 {CPM_PORTE, 18, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 149 {CPM_PORTE, 19, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 150 {CPM_PORTE, 20, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY}, 151 {CPM_PORTE, 21, CPM_PIN_OUTPUT}, 152 {CPM_PORTE, 22, CPM_PIN_OUTPUT}, 153 {CPM_PORTE, 23, CPM_PIN_OUTPUT}, 154 {CPM_PORTE, 24, CPM_PIN_OUTPUT}, 155 {CPM_PORTE, 25, CPM_PIN_OUTPUT}, 156 {CPM_PORTE, 26, CPM_PIN_OUTPUT}, 157 {CPM_PORTE, 27, CPM_PIN_OUTPUT}, 158 {CPM_PORTE, 28, CPM_PIN_OUTPUT}, 159 {CPM_PORTE, 29, CPM_PIN_OUTPUT}, 160#endif 161 /* I2C */ 162 {CPM_PORTB, 26, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN}, 163 {CPM_PORTB, 27, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN}, 164}; 165 166static void __init init_ioports(void) 167{ 168 int i; 169 170 for (i = 0; i < ARRAY_SIZE(mpc885ads_pins); i++) { 171 struct cpm_pin *pin = &mpc885ads_pins[i]; 172 cpm1_set_pin(pin->port, pin->pin, pin->flags); 173 } 174 175 cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX); 176 cpm1_clk_setup(CPM_CLK_SMC2, CPM_BRG2, CPM_CLK_RTX); 177 cpm1_clk_setup(CPM_CLK_SCC3, CPM_CLK5, CPM_CLK_TX); 178 cpm1_clk_setup(CPM_CLK_SCC3, CPM_CLK6, CPM_CLK_RX); 179 180 /* Set FEC1 and FEC2 to MII mode */ 181 clrbits32(&mpc8xx_immr->im_cpm.cp_cptr, 0x00000180); 182} 183 184static void __init mpc885ads_setup_arch(void) 185{ 186 struct device_node *np; 187 188 cpm_reset(); 189 init_ioports(); 190 191 np = of_find_compatible_node(NULL, NULL, "fsl,mpc885ads-bcsr"); 192 if (!np) { 193 printk(KERN_CRIT "Could not find fsl,mpc885ads-bcsr node\n"); 194 return; 195 } 196 197 bcsr = of_iomap(np, 0); 198 bcsr5 = of_iomap(np, 1); 199 of_node_put(np); 200 201 if (!bcsr || !bcsr5) { 202 printk(KERN_CRIT "Could not remap BCSR\n"); 203 return; 204 } 205 206 clrbits32(&bcsr[1], BCSR1_RS232EN_1); 207#ifdef CONFIG_MPC8xx_SECOND_ETH_FEC2 208 setbits32(&bcsr[1], BCSR1_RS232EN_2); 209#else 210 clrbits32(&bcsr[1], BCSR1_RS232EN_2); 211#endif 212 213 clrbits32(bcsr5, BCSR5_MII1_EN); 214 setbits32(bcsr5, BCSR5_MII1_RST); 215 udelay(1000); 216 clrbits32(bcsr5, BCSR5_MII1_RST); 217 218#ifdef CONFIG_MPC8xx_SECOND_ETH_FEC2 219 clrbits32(bcsr5, BCSR5_MII2_EN); 220 setbits32(bcsr5, BCSR5_MII2_RST); 221 udelay(1000); 222 clrbits32(bcsr5, BCSR5_MII2_RST); 223#else 224 setbits32(bcsr5, BCSR5_MII2_EN); 225#endif 226 227#ifdef CONFIG_MPC8xx_SECOND_ETH_SCC3 228 clrbits32(&bcsr[4], BCSR4_ETH10_RST); 229 udelay(1000); 230 setbits32(&bcsr[4], BCSR4_ETH10_RST); 231 232 setbits32(&bcsr[1], BCSR1_ETHEN); 233 234 np = of_find_node_by_path("/soc@ff000000/cpm@9c0/serial@a80"); 235#else 236 np = of_find_node_by_path("/soc@ff000000/cpm@9c0/ethernet@a40"); 237#endif 238 239 /* The SCC3 enet registers overlap the SMC1 registers, so 240 * one of the two must be removed from the device tree. 241 */ 242 243 if (np) { 244 of_detach_node(np); 245 of_node_put(np); 246 } 247 248#ifdef CONFIG_PCMCIA_M8XX 249 /* Set up board specific hook-ups.*/ 250 m8xx_pcmcia_ops.hw_ctrl = pcmcia_hw_setup; 251 m8xx_pcmcia_ops.voltage_set = pcmcia_set_voltage; 252#endif 253} 254 255static int __init mpc885ads_probe(void) 256{ 257 unsigned long root = of_get_flat_dt_root(); 258 return of_flat_dt_is_compatible(root, "fsl,mpc885ads"); 259} 260 261static struct of_device_id __initdata of_bus_ids[] = { 262 { .name = "soc", }, 263 { .name = "cpm", }, 264 { .name = "localbus", }, 265 {}, 266}; 267 268static int __init declare_of_platform_devices(void) 269{ 270 /* Publish the QE devices */ 271 of_platform_bus_probe(NULL, of_bus_ids, NULL); 272 273 return 0; 274} 275machine_device_initcall(mpc885_ads, declare_of_platform_devices); 276 277define_machine(mpc885_ads) { 278 .name = "Freescale MPC885 ADS", 279 .probe = mpc885ads_probe, 280 .setup_arch = mpc885ads_setup_arch, 281 .init_IRQ = mpc8xx_pics_init, 282 .get_irq = mpc8xx_get_irq, 283 .restart = mpc8xx_restart, 284 .calibrate_decr = mpc8xx_calibrate_decr, 285 .set_rtc_time = mpc8xx_set_rtc_time, 286 .get_rtc_time = mpc8xx_get_rtc_time, 287 .progress = udbg_progress, 288}; 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