+++ /dev/null
-/*
- * Sonics Silicon Backplane
- * PCMCIA-Hostbus related functions
- *
- * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
- * Copyright 2007 Michael Buesch <mb@bu3sch.de>
- *
- * Licensed under the GNU/GPL. See COPYING for details.
- */
-
-#include <linux/ssb/ssb.h>
-#include <linux/delay.h>
-
-#include <pcmcia/cs_types.h>
-#include <pcmcia/cs.h>
-#include <pcmcia/cistpl.h>
-#include <pcmcia/ciscode.h>
-#include <pcmcia/ds.h>
-#include <pcmcia/cisreg.h>
-
-#include "ssb_private.h"
-
-
-int ssb_pcmcia_switch_coreidx(struct ssb_bus *bus,
- u8 coreidx)
-{
- struct pcmcia_device *pdev = bus->host_pcmcia;
- int err;
- int attempts = 0;
- u32 cur_core;
- conf_reg_t reg;
- u32 addr;
- u32 read_addr;
-
- addr = (coreidx * SSB_CORE_SIZE) + SSB_ENUM_BASE;
- while (1) {
- reg.Action = CS_WRITE;
- reg.Offset = 0x2E;
- reg.Value = (addr & 0x0000F000) >> 12;
- err = pcmcia_access_configuration_register(pdev, ®);
- if (err != CS_SUCCESS)
- goto error;
- reg.Offset = 0x30;
- reg.Value = (addr & 0x00FF0000) >> 16;
- err = pcmcia_access_configuration_register(pdev, ®);
- if (err != CS_SUCCESS)
- goto error;
- reg.Offset = 0x32;
- reg.Value = (addr & 0xFF000000) >> 24;
- err = pcmcia_access_configuration_register(pdev, ®);
- if (err != CS_SUCCESS)
- goto error;
-
- read_addr = 0;
-
- reg.Action = CS_READ;
- reg.Offset = 0x2E;
- err = pcmcia_access_configuration_register(pdev, ®);
- if (err != CS_SUCCESS)
- goto error;
- read_addr |= (reg.Value & 0xF) << 12;
- reg.Offset = 0x30;
- err = pcmcia_access_configuration_register(pdev, ®);
- if (err != CS_SUCCESS)
- goto error;
- read_addr |= reg.Value << 16;
- reg.Offset = 0x32;
- err = pcmcia_access_configuration_register(pdev, ®);
- if (err != CS_SUCCESS)
- goto error;
- read_addr |= reg.Value << 24;
-
- cur_core = (read_addr - SSB_ENUM_BASE) / SSB_CORE_SIZE;
- if (cur_core == coreidx)
- break;
-
- if (attempts++ > SSB_BAR0_MAX_RETRIES)
- goto error;
- udelay(10);
- }
-
- return 0;
-error:
- ssb_printk(KERN_ERR PFX "Failed to switch to core %u\n", coreidx);
- return -ENODEV;
-}
-
-int ssb_pcmcia_switch_core(struct ssb_bus *bus,
- struct ssb_device *dev)
-{
- int err;
- unsigned long flags;
-
- ssb_dprintk(KERN_INFO PFX
- "Switching to %s core, index %d\n",
- ssb_core_name(dev->id.coreid),
- dev->core_index);
-
- spin_lock_irqsave(&bus->bar_lock, flags);
- err = ssb_pcmcia_switch_coreidx(bus, dev->core_index);
- if (!err)
- bus->mapped_device = dev;
- spin_unlock_irqrestore(&bus->bar_lock, flags);
-
- return err;
-}
-
-int ssb_pcmcia_switch_segment(struct ssb_bus *bus, u8 seg)
-{
- int attempts = 0;
- unsigned long flags;
- conf_reg_t reg;
- int res, err = 0;
-
- assert(seg == 0 || seg == 1);
- reg.Offset = 0x34;
- reg.Function = 0;
- spin_lock_irqsave(&bus->bar_lock, flags);
- while (1) {
- reg.Action = CS_WRITE;
- reg.Value = seg;
- res = pcmcia_access_configuration_register(bus->host_pcmcia, ®);
- if (unlikely(res != CS_SUCCESS))
- goto error;
- reg.Value = 0xFF;
- reg.Action = CS_READ;
- res = pcmcia_access_configuration_register(bus->host_pcmcia, ®);
- if (unlikely(res != CS_SUCCESS))
- goto error;
-
- if (reg.Value == seg)
- break;
-
- if (unlikely(attempts++ > SSB_BAR0_MAX_RETRIES))
- goto error;
- udelay(10);
- }
- bus->mapped_pcmcia_seg = seg;
-out_unlock:
- spin_unlock_irqrestore(&bus->bar_lock, flags);
- return err;
-error:
- ssb_printk(KERN_ERR PFX "Failed to switch pcmcia segment\n");
- err = -ENODEV;
- goto out_unlock;
-}
-
-static inline int do_select_core(struct ssb_bus *bus,
- struct ssb_device *dev,
- u16 *offset)
-{
- int err;
- u8 need_seg = (*offset >= 0x800) ? 1 : 0;
-
- if (unlikely(dev != bus->mapped_device)) {
- err = ssb_pcmcia_switch_core(bus, dev);
- if (unlikely(err))
- return err;
- }
- if (unlikely(need_seg != bus->mapped_pcmcia_seg)) {
- err = ssb_pcmcia_switch_segment(bus, need_seg);
- if (unlikely(err))
- return err;
- }
- if (need_seg == 1)
- *offset -= 0x800;
-
- return 0;
-}
-
-static u16 ssb_pcmcia_read16(struct ssb_device *dev, u16 offset)
-{
- struct ssb_bus *bus = dev->bus;
- u16 x;
-
- if (unlikely(do_select_core(bus, dev, &offset)))
- return 0xFFFF;
- x = readw(bus->mmio + offset);
-//printk("R16 0x%04X, 0x%04X\n", offset, x);
- return x;
-}
-
-static u32 ssb_pcmcia_read32(struct ssb_device *dev, u16 offset)
-{
- struct ssb_bus *bus = dev->bus;
- u32 x;
-
- if (unlikely(do_select_core(bus, dev, &offset)))
- return 0xFFFFFFFF;
- x = readl(bus->mmio + offset);
-//printk("R32 0x%04X, 0x%08X\n", offset, x);
- return x;
-}
-
-static void ssb_pcmcia_write16(struct ssb_device *dev, u16 offset, u16 value)
-{
- struct ssb_bus *bus = dev->bus;
-
- if (unlikely(do_select_core(bus, dev, &offset)))
- return;
-//printk("W16 0x%04X, 0x%04X\n", offset, value);
- writew(value, bus->mmio + offset);
-}
-
-static void ssb_pcmcia_write32(struct ssb_device *dev, u16 offset, u32 value)
-{
- struct ssb_bus *bus = dev->bus;
-
- if (unlikely(do_select_core(bus, dev, &offset)))
- return;
-//printk("W32 0x%04X, 0x%08X\n", offset, value);
- readw(bus->mmio + offset);
- writew(value >> 16, bus->mmio + offset + 2);
- readw(bus->mmio + offset);
- writew(value, bus->mmio + offset);
-}
-
-const struct ssb_bus_ops ssb_pcmcia_ops = {
- .read16 = ssb_pcmcia_read16,
- .read32 = ssb_pcmcia_read32,
- .write16 = ssb_pcmcia_write16,
- .write32 = ssb_pcmcia_write32,
-};
-
-int ssb_pcmcia_get_invariants(struct ssb_bus *bus,
- struct ssb_init_invariants *iv)
-{
- //TODO
- return 0;
-}
-
-int ssb_pcmcia_init(struct ssb_bus *bus)
-{
- conf_reg_t reg;
- int err;
-
- if (bus->bustype != SSB_BUSTYPE_PCMCIA)
- return 0;
-
- /* Switch segment to a known state and sync
- * bus->mapped_pcmcia_seg with hardware state. */
- ssb_pcmcia_switch_segment(bus, 0);
-
- /* Init IRQ routing */
- reg.Action = CS_READ;
- reg.Function = 0;
- if (bus->chip_id == 0x4306)
- reg.Offset = 0x00;
- else
- reg.Offset = 0x80;
- err = pcmcia_access_configuration_register(bus->host_pcmcia, ®);
- if (err != CS_SUCCESS)
- goto error;
- reg.Action = CS_WRITE;
- reg.Value |= 0x04 | 0x01;
- err = pcmcia_access_configuration_register(bus->host_pcmcia, ®);
- if (err != CS_SUCCESS)
- goto error;
-
- return 0;
-error:
- return -ENODEV;
-}
projects / openwrt / svn-archive / archive.git / blobdiff