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         if (bus->irq == NULL) {
 136                 ret = -ENOMEM;
 137                 goto err_free_bus;
 138         }
 139
 140         bus->name = "ep8248e-mdio-bitbang";
 141         bus->parent = &ofdev->dev;
 142         snprintf(bus->id, MII_BUS_ID_SIZE, "%x", res.start);
 143
 144         ret = of_mdiobus_register(bus, ofdev->node);
 145         if (ret)
 146                 goto err_free_irq;
 147
 148         return 0;
 149 err_free_irq:
 150         kfree(bus->irq);
 151 err_free_bus:
 152         free_mdio_bitbang(bus);
 153         return ret;
 154 }
 155
 156 static int ep8248e_mdio_remove(struct of_device *ofdev)
 157 {
 158         BUG();
 159         return 0;
 160 }
 161
 162 static const struct of_device_id ep8248e_mdio_match[] = {
 163         {
 164                 .compatible = "fsl,ep8248e-mdio-bitbang",
 165         },
 166         {},
 167 };
 168
 169 static struct of_platform_driver ep8248e_mdio_driver = {
 170         .driver = {
 171                 .name = "ep8248e-mdio-bitbang",
 172         },
 173         .match_table = ep8248e_mdio_match,
 174         .probe = ep8248e_mdio_probe,
 175         .remove = ep8248e_mdio_remove,
 176 };
 177
 178 struct cpm_pin {
 179         int port, pin, flags;
 180 };
 181
 182 static __initdata struct cpm_pin ep8248e_pins[] = {
 183         /* SMC1 */
 184         {2, 4, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 185         {2, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 186
 187         /* SCC1 */
 188         {2, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 189         {2, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 190         {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 191         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 192         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 193
 194         /* FCC1 */
 195         {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 196         {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 197         {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 198         {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 199         {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 200         {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 201         {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 202         {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 203         {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 204         {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 205         {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 206         {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 207         {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 208         {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 209         {2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 210         {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 211
 212         /* FCC2 */
 213         {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 214         {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 215         {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 216         {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 217         {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 218         {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 219         {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 220         {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 221         {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 222         {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 223         {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 224         {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 225         {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 226         {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 227         {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 228         {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 229
 230         /* I2C */
 231         {4, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 232         {4, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 233
 234         /* USB */
 235         {2, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 236         {2, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 237         {2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 238         {2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 239         {3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 240         {3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 241         {3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 242 };
 243
 244 static void __init init_ioports(void)
 245 {
 246         int i;
 247
 248         for (i = 0; i < ARRAY_SIZE(ep8248e_pins); i++) {
 249                 const struct cpm_pin *pin = &ep8248e_pins[i];
 250                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
 251         }
 252
 253         cpm2_smc_clk_setup(CPM_CLK_SMC1, CPM_BRG7);
 254         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
 255         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
 256         cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK8, CPM_CLK_TX); /* USB */
 257         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK11, CPM_CLK_RX);
 258         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
 259         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
 260         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
 261 }
 262
 263 static void __init ep8248e_setup_arch(void)
 264 {
 265         if (ppc_md.progress)
 266                 ppc_md.progress("ep8248e_setup_arch()", 0);
 267
 268         cpm2_reset();
 269
 270         /* When this is set, snooping CPM DMA from RAM causes
 271          * machine checks.  See erratum SIU18.
 272          */
 273         clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP);
 274
 275         ep8248e_bcsr_node =
 276                 of_find_compatible_node(NULL, NULL, "fsl,ep8248e-bcsr");
 277         if (!ep8248e_bcsr_node) {
 278                 printk(KERN_ERR "No bcsr in device tree\n");
 279                 return;
 280         }
 281
 282         ep8248e_bcsr = of_iomap(ep8248e_bcsr_node, 0);
 283         if (!ep8248e_bcsr) {
 284                 printk(KERN_ERR "Cannot map BCSR registers\n");
 285                 of_node_put(ep8248e_bcsr_node);
 286                 ep8248e_bcsr_node = NULL;
 287                 return;
 288         }
 289
 290         setbits8(&ep8248e_bcsr[7], BCSR7_SCC2_ENABLE);
 291         setbits8(&ep8248e_bcsr[8], BCSR8_PHY1_ENABLE | BCSR8_PHY1_POWER |
 292                                    BCSR8_PHY2_ENABLE | BCSR8_PHY2_POWER);
 293
 294         init_ioports();
 295
 296         if (ppc_md.progress)
 297                 ppc_md.progress("ep8248e_setup_arch(), finish", 0);
 298 }
 299
 300 static  __initdata struct of_device_id of_bus_ids[] = {
 301         { .compatible = "simple-bus", },
 302         { .compatible = "fsl,ep8248e-bcsr", },
 303         {},
 304 };
 305
 306 static int __init declare_of_platform_devices(void)
 307 {
 308         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 309         of_register_platform_driver(&ep8248e_mdio_driver);
 310
 311         return 0;
 312 }
 313 machine_device_initcall(ep8248e, declare_of_platform_devices);
 314
 315 /*
 316  * Called very early, device-tree isn't unflattened
 317  */
 318 static int __init ep8248e_probe(void)
 319 {
 320         unsigned long root = of_get_flat_dt_root();
 321         return of_flat_dt_is_compatible(root, "fsl,ep8248e");
 322 }
 323
 324 define_machine(ep8248e)
 325 {
 326         .name = "Embedded Planet EP8248E",
 327         .probe = ep8248e_probe,
 328         .setup_arch = ep8248e_setup_arch,
 329         .init_IRQ = ep8248e_pic_init,
 330         .get_irq = cpm2_get_irq,
 331         .calibrate_decr = generic_calibrate_decr,
 332         .restart = pq2_restart,
 333         .progress = udbg_progress,
 334 };