arch/powerpc/platforms/8xx/mpc885ads_setup.c

   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
  46 static u32 __iomem *bcsr, *bcsr5;
  47
  48 #ifdef CONFIG_PCMCIA_M8XX
  49 static 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
  57 static 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
 103 struct cpm_pin {
 104         int port, pin, flags;
 105 };
 106
 107 static 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
 166 static 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
 184 static 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
 255 static 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
 261 static struct of_device_id __initdata of_bus_ids[] = {
 262         { .name = "soc", },
 263         { .name = "cpm", },
 264         { .name = "localbus", },
 265         {},
 266 };
 267
 268 static 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 }
 275 machine_device_initcall(mpc885_ads, declare_of_platform_devices);
 276
 277 define_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 };