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/slab.h>
  19 #include <linux/of_platform.h>
  20
  21 #include <asm/io.h>
  22 #include <asm/cpm2.h>
  23 #include <asm/udbg.h>
  24 #include <asm/machdep.h>
  25 #include <asm/time.h>
  26 #include <asm/mpc8260.h>
  27 #include <asm/prom.h>
  28
  29 #include <sysdev/fsl_soc.h>
  30 #include <sysdev/cpm2_pic.h>
  31
  32 #include "pq2.h"
  33
  34 static u8 __iomem *ep8248e_bcsr;
  35 static struct device_node *ep8248e_bcsr_node;
  36
  37 #define BCSR7_SCC2_ENABLE 0x10
  38
  39 #define BCSR8_PHY1_ENABLE 0x80
  40 #define BCSR8_PHY1_POWER  0x40
  41 #define BCSR8_PHY2_ENABLE 0x20
  42 #define BCSR8_PHY2_POWER  0x10
  43 #define BCSR8_MDIO_READ   0x04
  44 #define BCSR8_MDIO_CLOCK  0x02
  45 #define BCSR8_MDIO_DATA   0x01
  46
  47 #define BCSR9_USB_ENABLE  0x80
  48 #define BCSR9_USB_POWER   0x40
  49 #define BCSR9_USB_HOST    0x20
  50 #define BCSR9_USB_FULL_SPEED_TARGET 0x10
  51
  52 static void __init ep8248e_pic_init(void)
  53 {
  54         struct device_node *np = of_find_compatible_node(NULL, NULL, "fsl,pq2-pic");
  55         if (!np) {
  56                 printk(KERN_ERR "PIC init: can not find cpm-pic node\n");
  57                 return;
  58         }
  59
  60         cpm2_pic_init(np);
  61         of_node_put(np);
  62 }
  63
  64 static void ep8248e_set_mdc(struct mdiobb_ctrl *ctrl, int level)
  65 {
  66         if (level)
  67                 setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_CLOCK);
  68         else
  69                 clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_CLOCK);
  70
  71         /* Read back to flush the write. */
  72         in_8(&ep8248e_bcsr[8]);
  73 }
  74
  75 static void ep8248e_set_mdio_dir(struct mdiobb_ctrl *ctrl, int output)
  76 {
  77         if (output)
  78                 clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_READ);
  79         else
  80                 setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_READ);
  81
  82         /* Read back to flush the write. */
  83         in_8(&ep8248e_bcsr[8]);
  84 }
  85
  86 static void ep8248e_set_mdio_data(struct mdiobb_ctrl *ctrl, int data)
  87 {
  88         if (data)
  89                 setbits8(&ep8248e_bcsr[8], BCSR8_MDIO_DATA);
  90         else
  91                 clrbits8(&ep8248e_bcsr[8], BCSR8_MDIO_DATA);
  92
  93         /* Read back to flush the write. */
  94         in_8(&ep8248e_bcsr[8]);
  95 }
  96
  97 static int ep8248e_get_mdio_data(struct mdiobb_ctrl *ctrl)
  98 {
  99         return in_8(&ep8248e_bcsr[8]) & BCSR8_MDIO_DATA;
 100 }
 101
 102 static const struct mdiobb_ops ep8248e_mdio_ops = {
 103         .set_mdc = ep8248e_set_mdc,
 104         .set_mdio_dir = ep8248e_set_mdio_dir,
 105         .set_mdio_data = ep8248e_set_mdio_data,
 106         .get_mdio_data = ep8248e_get_mdio_data,
 107         .owner = THIS_MODULE,
 108 };
 109
 110 static struct mdiobb_ctrl ep8248e_mdio_ctrl = {
 111         .ops = &ep8248e_mdio_ops,
 112 };
 113
 114 static int __devinit ep8248e_mdio_probe(struct platform_device *ofdev,
 115                                         const struct of_device_id *match)
 116 {
 117         struct mii_bus *bus;
 118         struct resource res;
 119         struct device_node *node;
 120         int ret;
 121
 122         node = of_get_parent(ofdev->dev.of_node);
 123         of_node_put(node);
 124         if (node != ep8248e_bcsr_node)
 125                 return -ENODEV;
 126
 127         ret = of_address_to_resource(ofdev->dev.of_node, 0, &res);
 128         if (ret)
 129                 return ret;
 130
 131         bus = alloc_mdio_bitbang(&ep8248e_mdio_ctrl);
 132         if (!bus)
 133                 return -ENOMEM;
 134
 135         bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
 136         if (bus->irq == NULL) {
 137                 ret = -ENOMEM;
 138                 goto err_free_bus;
 139         }
 140
 141         bus->name = "ep8248e-mdio-bitbang";
 142         bus->parent = &ofdev->dev;
 143         snprintf(bus->id, MII_BUS_ID_SIZE, "%x", res.start);
 144
 145         ret = of_mdiobus_register(bus, ofdev->dev.of_node);
 146         if (ret)
 147                 goto err_free_irq;
 148
 149         return 0;
 150 err_free_irq:
 151         kfree(bus->irq);
 152 err_free_bus:
 153         free_mdio_bitbang(bus);
 154         return ret;
 155 }
 156
 157 static int ep8248e_mdio_remove(struct platform_device *ofdev)
 158 {
 159         BUG();
 160         return 0;
 161 }
 162
 163 static const struct of_device_id ep8248e_mdio_match[] = {
 164         {
 165                 .compatible = "fsl,ep8248e-mdio-bitbang",
 166         },
 167         {},
 168 };
 169
 170 static struct of_platform_driver ep8248e_mdio_driver = {
 171         .driver = {
 172                 .name = "ep8248e-mdio-bitbang",
 173                 .owner = THIS_MODULE,
 174                 .of_match_table = ep8248e_mdio_match,
 175         },
 176         .probe = ep8248e_mdio_probe,
 177         .remove = ep8248e_mdio_remove,
 178 };
 179
 180 struct cpm_pin {
 181         int port, pin, flags;
 182 };
 183
 184 static __initdata struct cpm_pin ep8248e_pins[] = {
 185         /* SMC1 */
 186         {2, 4, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 187         {2, 5, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 188
 189         /* SCC1 */
 190         {2, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 191         {2, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 192         {3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 193         {3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 194         {3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 195
 196         /* FCC1 */
 197         {0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 198         {0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 199         {0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 200         {0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 201         {0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 202         {0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 203         {0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 204         {0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 205         {0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 206         {0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 207         {0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 208         {0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 209         {0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 210         {0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 211         {2, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 212         {2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 213
 214         /* FCC2 */
 215         {1, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 216         {1, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 217         {1, 20, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 218         {1, 21, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 219         {1, 22, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 220         {1, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 221         {1, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 222         {1, 25, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 223         {1, 26, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 224         {1, 27, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 225         {1, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 226         {1, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
 227         {1, 30, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 228         {1, 31, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 229         {2, 18, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 230         {2, 19, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 231
 232         /* I2C */
 233         {4, 14, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 234         {4, 15, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
 235
 236         /* USB */
 237         {2, 10, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 238         {2, 11, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 239         {2, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 240         {2, 24, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 241         {3, 23, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 242         {3, 24, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
 243         {3, 25, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
 244 };
 245
 246 static void __init init_ioports(void)
 247 {
 248         int i;
 249
 250         for (i = 0; i < ARRAY_SIZE(ep8248e_pins); i++) {
 251                 const struct cpm_pin *pin = &ep8248e_pins[i];
 252                 cpm2_set_pin(pin->port, pin->pin, pin->flags);
 253         }
 254
 255         cpm2_smc_clk_setup(CPM_CLK_SMC1, CPM_BRG7);
 256         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
 257         cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
 258         cpm2_clk_setup(CPM_CLK_SCC3, CPM_CLK8, CPM_CLK_TX); /* USB */
 259         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK11, CPM_CLK_RX);
 260         cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
 261         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK13, CPM_CLK_RX);
 262         cpm2_clk_setup(CPM_CLK_FCC2, CPM_CLK14, CPM_CLK_TX);
 263 }
 264
 265 static void __init ep8248e_setup_arch(void)
 266 {
 267         if (ppc_md.progress)
 268                 ppc_md.progress("ep8248e_setup_arch()", 0);
 269
 270         cpm2_reset();
 271
 272         /* When this is set, snooping CPM DMA from RAM causes
 273          * machine checks.  See erratum SIU18.
 274          */
 275         clrbits32(&cpm2_immr->im_siu_conf.siu_82xx.sc_bcr, MPC82XX_BCR_PLDP);
 276
 277         ep8248e_bcsr_node =
 278                 of_find_compatible_node(NULL, NULL, "fsl,ep8248e-bcsr");
 279         if (!ep8248e_bcsr_node) {
 280                 printk(KERN_ERR "No bcsr in device tree\n");
 281                 return;
 282         }
 283
 284         ep8248e_bcsr = of_iomap(ep8248e_bcsr_node, 0);
 285         if (!ep8248e_bcsr) {
 286                 printk(KERN_ERR "Cannot map BCSR registers\n");
 287                 of_node_put(ep8248e_bcsr_node);
 288                 ep8248e_bcsr_node = NULL;
 289                 return;
 290         }
 291
 292         setbits8(&ep8248e_bcsr[7], BCSR7_SCC2_ENABLE);
 293         setbits8(&ep8248e_bcsr[8], BCSR8_PHY1_ENABLE | BCSR8_PHY1_POWER |
 294                                    BCSR8_PHY2_ENABLE | BCSR8_PHY2_POWER);
 295
 296         init_ioports();
 297
 298         if (ppc_md.progress)
 299                 ppc_md.progress("ep8248e_setup_arch(), finish", 0);
 300 }
 301
 302 static  __initdata struct of_device_id of_bus_ids[] = {
 303         { .compatible = "simple-bus", },
 304         { .compatible = "fsl,ep8248e-bcsr", },
 305         {},
 306 };
 307
 308 static int __init declare_of_platform_devices(void)
 309 {
 310         of_platform_bus_probe(NULL, of_bus_ids, NULL);
 311         of_register_platform_driver(&ep8248e_mdio_driver);
 312
 313         return 0;
 314 }
 315 machine_device_initcall(ep8248e, declare_of_platform_devices);
 316
 317 /*
 318  * Called very early, device-tree isn't unflattened
 319  */
 320 static int __init ep8248e_probe(void)
 321 {
 322         unsigned long root = of_get_flat_dt_root();
 323         return of_flat_dt_is_compatible(root, "fsl,ep8248e");
 324 }
 325
 326 define_machine(ep8248e)
 327 {
 328         .name = "Embedded Planet EP8248E",
 329         .probe = ep8248e_probe,
 330         .setup_arch = ep8248e_setup_arch,
 331         .init_IRQ = ep8248e_pic_init,
 332         .get_irq = cpm2_get_irq,
 333         .calibrate_decr = generic_calibrate_decr,
 334         .restart = pq2_restart,
 335         .progress = udbg_progress,
 336 };