arch/powerpc/platforms/82xx/ep8248e.c

   1 /*
   2  * Embedded Planet EP8248E support
   3  *
   4  * Copyright 2007 Freescale Semiconductor, Inc.
   5  * Author: Scott Wood <scottwood@freescale.com>
   6  *
   7  * This program is free software; you can redistribute  it and/or modify it
   8  * under  the terms of  the GNU General  Public License as published by the
   9  * Free Software Foundation;  either version 2 of the  License, or (at your
  10  * option) any later version.
  11  */
  12
  13 #include <linux/init.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/fsl_devices.h>
  16 #include <linux/mdio-bitbang.h>
  17 #include <linux/of_mdio.h>
  18 #include <linux/of_platform.h>
  19
  20 #include <asm/io.h>
  21 #include <asm/cpm2.h>
  22 #include <asm/udbg.h>
  23 #include <asm/machdep.h>
  24 #include <asm/time.h>
  25 #include <asm/mpc8260.h>
  26 #include <asm/prom.h>
  27
  28 #include <sysdev/fsl_soc.h>
  29 #include <sysdev/cpm2_pic.h>
  30
  31 #include "pq2.h"
  32
  33 static u8 __iomem *ep8248e_bcsr;
  34 static struct device_node *ep8248e_bcsr_node;
  35
  36 #define BCSR7_SCC2_ENABLE 0x10
  37
  38 #define BCSR8_PHY1_ENABLE 0x80
  39 #define BCSR8_PHY1_POWER  0x40
  40 #define BCSR8_PHY2_ENABLE 0x20
  41 #define BCSR8_PHY2_POWER  0x10
  42 #define BCSR8_MDIO_READ   0x04
  43 #define BCSR8_MDIO_CLOCK  0x02
  44 #define BCSR8_MDIO_DATA   0x01
  45
  46 #define BCSR9_USB_ENABLE  0x80
  47 #define BCSR9_USB_POWER   0x40
  48 #define BCSR9_USB_HOST    0x20
  49 #define BCSR9_USB_FULL_SPEED_TARGET 0x10
  50
  51 static void __init ep8248e_pic_init(void)
  52 {
  53         struct device_node *np = of_find_compatible_node(NULL, NULL, "fsl,pq2-pic");
  54         if (!np) {
  55                 printk(KERN_ERR "PIC init: can not find cpm-pic node\n");
  56                 return;
  57         }
  58
  59         cpm2_pic_init(np);
  60         of_node_put(np);
  61 }
  62
  63 static void ep8248e_set_mdc(struct mdiobb_ctrl *ctrl, int level)
  64 {
  65         if (level)
  66                 setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_CLOCK);
  67         else
  68                 clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_CLOCK);
  69
  70         /* Read back to flush the write. */
  71         in_8(&ep8248e_bcsr[8]);
  72 }
  73
  74 static void ep8248e_set_mdio_dir(struct mdiobb_ctrl *ctrl, int output)
  75 {
  76         if (output)
  77                 clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_READ);
  78         else
  79                 setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_READ);
  80
  81         /* Read back to flush the write. */
  82         in_8(&ep8248e_bcsr[8]);
  83 }
  84
  85 static void ep8248e_set_mdio_data(struct mdiobb_ctrl *ctrl, int data)
  86 {
  87         if (data)
  88                 setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_DATA);
  89         else
  90                 clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_DATA);
  91
  92         /* Read back to flush the write. */
  93         in_8(&ep8248e_bcsr[8]);
  94 }
  95
  96 static int ep8248e_get_mdio_data(struct mdiobb_ctrl *ctrl)
  97 {
  98         return in_8(&ep8248e_bcsr[8]) & BCSR8_MDIO_DATA;
  99 }
 100
 101 static const struct mdiobb_ops ep8248e_mdio_ops = {
 102         .set_mdc = ep8248e_set_mdc,
 103         .set_mdio_dir = ep8248e_set_mdio_dir,
 104         .set_mdio_data = ep8248e_set_mdio_data,
 105         .get_mdio_data = ep8248e_get_mdio_data,
 106         .owner = THIS_MODULE,
 107 };
 108
 109 static struct mdiobb_ctrl ep8248e_mdio_ctrl = {
 110         .ops = &ep8248e_mdio_ops,
 111 };
 112
 113 static int __devinit ep8248e_mdio_probe(struct of_device *ofdev,
 114                                         const struct of_device_id *match)
 115 {
 116         struct mii_bus *bus;
 117         struct resource res;
 118         struct device_node *node;
 119         int ret;
 120
 121         node = of_get_parent(ofdev->node);
 122         of_node_put(node);
 123         if (node != ep8248e_bcsr_node)
 124                 return -ENODEV;
 125
 126         ret = of_address_to_resource(ofdev->node, 0, &res);
 127         if (ret)
 128                 return ret;
 129
 130         bus = alloc_mdio_bitbang(&ep8248e_mdio_ctrl);
 131         if (!bus)
 132                 return -ENOMEM;
 133
 134         bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
 135
 136         bus->name = "ep8248e-mdio-bitbang";
 137         bus->parent = &ofdev->dev;
 138         snprintf(bus->id, MII_BUS_ID_SIZE, "%x", res.start);
 139
 140         return of_mdiobus_register(bus, ofdev->node);
 141 }
 142
 143 static int ep8248e_mdio_remove(struct of_device *ofdev)
 144 {
 145         BUG();
 146         return 0;
 147 }
 148
 149 static const struct of_device_id ep8248e_mdio_match[] = {
 150         {
 151                 .compatible = "fsl,ep8248e-mdio-bitbang",
 152         },
 153         {},
 154 };
 155
 156 static struct of_platform_driver ep8248e_mdio_driver = {
 157         .driver = {
 158                 .name = "ep8248e-mdio-bitbang",
 159         },
 160         .match_table = ep8248e_mdio_match,
 161         .probe = ep8248e_mdio_probe,
 162         .remove = ep8248e_mdio_remove,
 163 };
 164
 165 struct cpm_pin {
 166         int port, pin, flags;
 167 };
 168
 169 static __initdata struct cpm_pin ep8248e_pins[] = {
 170         /* SMC1 */
 171         {2, 4, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 172         {2, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 173
 174         /* SCC1 */
 175         {2, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 176         {2, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 177         {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 178         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 179         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 180
 181         /* FCC1 */
 182         {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 183         {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 184         {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 185         {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 186         {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 187         {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 188         {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 189         {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 190         {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 191         {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 192         {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 193         {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 194         {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 195         {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 196         {2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 197         {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 198
 199         /* FCC2 */
 200         {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 201         {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 202         {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 203         {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 204         {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 205         {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 206         {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 207         {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 208         {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 209         {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 210         {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 211         {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 212         {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 213         {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 214         {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 215         {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 216
 217         /* I2C */
 218         {4, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 219         {4, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 220
 221         /* USB */
 222         {2, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 223         {2, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 224         {2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 225         {2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 226         {3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 227         {3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 228         {3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 229 };
 230
 231 static void __init init_ioports(void)
 232 {
 233         int i;
 234
 235         for (i = 0; i < ARRAY_SIZE(ep8248e_pins); i++) {
 236                 const struct cpm_pin *pin = &ep8248e_pins[i];
 237                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
 238         }
 239
 240         cpm2_smc_clk_setup(CPM_CLK_SMC1, CPM_BRG7);
 241         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
 242         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
 243         cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK8, CPM_CLK_TX); /* USB */
 244         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK11, CPM_CLK_RX);
 245         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
 246         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
 247         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
 248 }
 249
 250 static void __init ep8248e_setup_arch(void)
 251 {
 252         if (ppc_md.progress)
 253                 ppc_md.progress("ep8248e_setup_arch()", 0);
 254
 255         cpm2_reset();
 256
 257         /* When this is set, snooping CPM DMA from RAM causes
 258          * machine checks.  See erratum SIU18.
 259          */
 260         clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP);
 261
 262         ep8248e_bcsr_node =
 263                 of_find_compatible_node(NULL, NULL, "fsl,ep8248e-bcsr");
 264         if (!ep8248e_bcsr_node) {
 265                 printk(KERN_ERR "No bcsr in device tree\n");
 266                 return;
 267         }
 268
 269         ep8248e_bcsr = of_iomap(ep8248e_bcsr_node, 0);
 270         if (!ep8248e_bcsr) {
 271                 printk(KERN_ERR "Cannot map BCSR registers\n");
 272                 of_node_put(ep8248e_bcsr_node);
 273                 ep8248e_bcsr_node = NULL;
 274                 return;
 275         }
 276
 277         setbits8(&ep8248e_bcsr[7], BCSR7_SCC2_ENABLE);
 278         setbits8(&ep8248e_bcsr[8], BCSR8_PHY1_ENABLE | BCSR8_PHY1_POWER |
 279                                    BCSR8_PHY2_ENABLE | BCSR8_PHY2_POWER);
 280
 281         init_ioports();
 282
 283         if (ppc_md.progress)
 284                 ppc_md.progress("ep8248e_setup_arch(), finish", 0);
 285 }
 286
 287 static  __initdata struct of_device_id of_bus_ids[] = {
 288         { .compatible = "simple-bus", },
 289         { .compatible = "fsl,ep8248e-bcsr", },
 290         {},
 291 };
 292
 293 static int __init declare_of_platform_devices(void)
 294 {
 295         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 296         of_register_platform_driver(&ep8248e_mdio_driver);
 297
 298         return 0;
 299 }
 300 machine_device_initcall(ep8248e, declare_of_platform_devices);
 301
 302 /*
 303  * Called very early, device-tree isn't unflattened
 304  */
 305 static int __init ep8248e_probe(void)
 306 {
 307         unsigned long root = of_get_flat_dt_root();
 308         return of_flat_dt_is_compatible(root, "fsl,ep8248e");
 309 }
 310
 311 define_machine(ep8248e)
 312 {
 313         .name = "Embedded Planet EP8248E",
 314         .probe = ep8248e_probe,
 315         .setup_arch = ep8248e_setup_arch,
 316         .init_IRQ = ep8248e_pic_init,
 317         .get_irq = cpm2_get_irq,
 318         .calibrate_decr = generic_calibrate_decr,
 319         .restart = pq2_restart,
 320         .progress = udbg_progress,
 321 };