2  * Sonics Silicon Backplane
 
   3  * PCMCIA-Hostbus related functions
 
   5  * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
 
   6  * Copyright 2007 Michael Buesch <mb@bu3sch.de>
 
   8  * Licensed under the GNU/GPL. See COPYING for details.
 
  11 #include <linux/ssb/ssb.h>
 
  12 #include <linux/delay.h>
 
  15 #include <pcmcia/cs_types.h>
 
  16 #include <pcmcia/cs.h>
 
  17 #include <pcmcia/cistpl.h>
 
  18 #include <pcmcia/ciscode.h>
 
  19 #include <pcmcia/ds.h>
 
  20 #include <pcmcia/cisreg.h>
 
  22 #include "ssb_private.h"
 
  25 /* Define the following to 1 to enable a printk on each coreswitch. */
 
  26 #define SSB_VERBOSE_PCMCIACORESWITCH_DEBUG              0
 
  29 int ssb_pcmcia_switch_coreidx(struct ssb_bus *bus,
 
  32         struct pcmcia_device *pdev = bus->host_pcmcia;
 
  40         addr = (coreidx * SSB_CORE_SIZE) + SSB_ENUM_BASE;
 
  42                 reg.Action = CS_WRITE;
 
  44                 reg.Value = (addr & 0x0000F000) >> 12;
 
  45                 err = pcmcia_access_configuration_register(pdev, ®);
 
  46                 if (err != CS_SUCCESS)
 
  49                 reg.Value = (addr & 0x00FF0000) >> 16;
 
  50                 err = pcmcia_access_configuration_register(pdev, ®);
 
  51                 if (err != CS_SUCCESS)
 
  54                 reg.Value = (addr & 0xFF000000) >> 24;
 
  55                 err = pcmcia_access_configuration_register(pdev, ®);
 
  56                 if (err != CS_SUCCESS)
 
  63                 err = pcmcia_access_configuration_register(pdev, ®);
 
  64                 if (err != CS_SUCCESS)
 
  66                 read_addr |= ((u32)(reg.Value & 0x0F)) << 12;
 
  68                 err = pcmcia_access_configuration_register(pdev, ®);
 
  69                 if (err != CS_SUCCESS)
 
  71                 read_addr |= ((u32)reg.Value) << 16;
 
  73                 err = pcmcia_access_configuration_register(pdev, ®);
 
  74                 if (err != CS_SUCCESS)
 
  76                 read_addr |= ((u32)reg.Value) << 24;
 
  78                 cur_core = (read_addr - SSB_ENUM_BASE) / SSB_CORE_SIZE;
 
  79                 if (cur_core == coreidx)
 
  82                 if (attempts++ > SSB_BAR0_MAX_RETRIES)
 
  89         ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx);
 
  93 int ssb_pcmcia_switch_core(struct ssb_bus *bus,
 
  94                            struct ssb_device *dev)
 
  98 #if SSB_VERBOSE_PCMCIACORESWITCH_DEBUG
 
  99         ssb_printk(KERN_INFO PFX
 
 100                    "Switching to %s core, index %d\n",
 
 101                    ssb_core_name(dev->id.coreid),
 
 105         err = ssb_pcmcia_switch_coreidx(bus, dev->core_index);
 
 107                 bus->mapped_device = dev;
 
 112 int ssb_pcmcia_switch_segment(struct ssb_bus *bus, u8 seg)
 
 118         SSB_WARN_ON((seg != 0) && (seg != 1));
 
 122                 reg.Action = CS_WRITE;
 
 124                 res = pcmcia_access_configuration_register(bus->host_pcmcia, ®);
 
 125                 if (unlikely(res != CS_SUCCESS))
 
 128                 reg.Action = CS_READ;
 
 129                 res = pcmcia_access_configuration_register(bus->host_pcmcia, ®);
 
 130                 if (unlikely(res != CS_SUCCESS))
 
 133                 if (reg.Value == seg)
 
 136                 if (unlikely(attempts++ > SSB_BAR0_MAX_RETRIES))
 
 140         bus->mapped_pcmcia_seg = seg;
 
 144         ssb_printk(KERN_ERR PFX "Failed to switch pcmcia segment\n");
 
 148 static int select_core_and_segment(struct ssb_device *dev,
 
 151         struct ssb_bus *bus = dev->bus;
 
 155         if (*offset >= 0x800) {
 
 161         if (unlikely(dev != bus->mapped_device)) {
 
 162                 err = ssb_pcmcia_switch_core(bus, dev);
 
 166         if (unlikely(need_segment != bus->mapped_pcmcia_seg)) {
 
 167                 err = ssb_pcmcia_switch_segment(bus, need_segment);
 
 175 static u16 ssb_pcmcia_read16(struct ssb_device *dev, u16 offset)
 
 177         struct ssb_bus *bus = dev->bus;
 
 182         spin_lock_irqsave(&bus->bar_lock, flags);
 
 183         err = select_core_and_segment(dev, &offset);
 
 185                 value = readw(bus->mmio + offset);
 
 186         spin_unlock_irqrestore(&bus->bar_lock, flags);
 
 191 static u32 ssb_pcmcia_read32(struct ssb_device *dev, u16 offset)
 
 193         struct ssb_bus *bus = dev->bus;
 
 196         u32 lo = 0xFFFFFFFF, hi = 0xFFFFFFFF;
 
 198         spin_lock_irqsave(&bus->bar_lock, flags);
 
 199         err = select_core_and_segment(dev, &offset);
 
 201                 lo = readw(bus->mmio + offset);
 
 202                 hi = readw(bus->mmio + offset + 2);
 
 204         spin_unlock_irqrestore(&bus->bar_lock, flags);
 
 206         return (lo | (hi << 16));
 
 209 static void ssb_pcmcia_write16(struct ssb_device *dev, u16 offset, u16 value)
 
 211         struct ssb_bus *bus = dev->bus;
 
 215         spin_lock_irqsave(&bus->bar_lock, flags);
 
 216         err = select_core_and_segment(dev, &offset);
 
 218                 writew(value, bus->mmio + offset);
 
 220         spin_unlock_irqrestore(&bus->bar_lock, flags);
 
 223 static void ssb_pcmcia_write32(struct ssb_device *dev, u16 offset, u32 value)
 
 225         struct ssb_bus *bus = dev->bus;
 
 229         spin_lock_irqsave(&bus->bar_lock, flags);
 
 230         err = select_core_and_segment(dev, &offset);
 
 232                 writew((value & 0x0000FFFF), bus->mmio + offset);
 
 233                 writew(((value & 0xFFFF0000) >> 16), bus->mmio + offset + 2);
 
 236         spin_unlock_irqrestore(&bus->bar_lock, flags);
 
 239 /* Not "static", as it's used in main.c */
 
 240 const struct ssb_bus_ops ssb_pcmcia_ops = {
 
 241         .read16         = ssb_pcmcia_read16,
 
 242         .read32         = ssb_pcmcia_read32,
 
 243         .write16        = ssb_pcmcia_write16,
 
 244         .write32        = ssb_pcmcia_write32,
 
 247 #include <linux/etherdevice.h>
 
 248 int ssb_pcmcia_get_invariants(struct ssb_bus *bus,
 
 249                               struct ssb_init_invariants *iv)
 
 252         random_ether_addr(iv->sprom.il0mac);
 
 256 int ssb_pcmcia_init(struct ssb_bus *bus)
 
 261         if (bus->bustype != SSB_BUSTYPE_PCMCIA)
 
 264         /* Switch segment to a known state and sync
 
 265          * bus->mapped_pcmcia_seg with hardware state. */
 
 266         ssb_pcmcia_switch_segment(bus, 0);
 
 268         /* Init IRQ routing */
 
 269         reg.Action = CS_READ;
 
 271         if (bus->chip_id == 0x4306)
 
 275         err = pcmcia_access_configuration_register(bus->host_pcmcia, ®);
 
 276         if (err != CS_SUCCESS)
 
 278         reg.Action = CS_WRITE;
 
 279         reg.Value |= 0x04 | 0x01;
 
 280         err = pcmcia_access_configuration_register(bus->host_pcmcia, ®);
 
 281         if (err != CS_SUCCESS)