diff options
Diffstat (limited to 'target/linux/brcm47xx-2.6/files/drivers/ssb/main.c')
| -rw-r--r-- | target/linux/brcm47xx-2.6/files/drivers/ssb/main.c | 1062 |
1 files changed, 0 insertions, 1062 deletions
diff --git a/target/linux/brcm47xx-2.6/files/drivers/ssb/main.c b/target/linux/brcm47xx-2.6/files/drivers/ssb/main.c deleted file mode 100644 index a892f1dafc..0000000000 --- a/target/linux/brcm47xx-2.6/files/drivers/ssb/main.c +++ /dev/null @@ -1,1062 +0,0 @@ -/* - * Sonics Silicon Backplane - * Subsystem core - * - * Copyright 2005, Broadcom Corporation - * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de> - * - * Licensed under the GNU/GPL. See COPYING for details. - */ - -#include "ssb_private.h" - -#include <linux/delay.h> -#include <linux/ssb/ssb.h> -#include <linux/ssb/ssb_regs.h> - -#ifdef CONFIG_SSB_PCIHOST -# include <linux/pci.h> -#endif - -#ifdef CONFIG_SSB_PCMCIAHOST -# include <pcmcia/cs_types.h> -# include <pcmcia/cs.h> -# include <pcmcia/cistpl.h> -# include <pcmcia/ds.h> -#endif - - -MODULE_DESCRIPTION("Sonics Silicon Backplane driver"); -MODULE_LICENSE("GPL"); - - -static LIST_HEAD(attach_queue); -static LIST_HEAD(buses); -static unsigned int next_busnumber; -static DEFINE_MUTEX(buses_mutex); - -static void ssb_buses_lock(void); -static void ssb_buses_unlock(void); - - -#ifdef CONFIG_SSB_PCIHOST -struct ssb_bus * ssb_pci_dev_to_bus(struct pci_dev *pdev) -{ - struct ssb_bus *bus; - - ssb_buses_lock(); - list_for_each_entry(bus, &buses, list) { - if (bus->bustype == SSB_BUSTYPE_PCI && - bus->host_pci == pdev) - goto found; - } - bus = NULL; -found: - ssb_buses_unlock(); - - return bus; -} -#endif /* CONFIG_SSB_PCIHOST */ - -static struct ssb_device * ssb_device_get(struct ssb_device *dev) -{ - if (dev) - get_device(dev->dev); - return dev; -} - -static void ssb_device_put(struct ssb_device *dev) -{ - if (dev) - put_device(dev->dev); -} - -static int ssb_bus_resume(struct ssb_bus *bus) -{ - int err; - - ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1); - err = ssb_pcmcia_init(bus); - if (err) { - /* No need to disable XTAL, as we don't have one on PCMCIA. */ - return err; - } - ssb_chipco_resume(&bus->chipco); - - return 0; -} - -static int ssb_device_resume(struct device *dev) -{ - struct ssb_device *ssb_dev = dev_to_ssb_dev(dev); - struct ssb_driver *ssb_drv; - struct ssb_bus *bus; - int err = 0; - - bus = ssb_dev->bus; - if (bus->suspend_cnt == bus->nr_devices) { - err = ssb_bus_resume(bus); - if (err) - return err; - } - bus->suspend_cnt--; - if (dev->driver) { - ssb_drv = drv_to_ssb_drv(dev->driver); - if (ssb_drv && ssb_drv->resume) - err = ssb_drv->resume(ssb_dev); - if (err) - goto out; - } -out: - return err; -} - -static void ssb_bus_suspend(struct ssb_bus *bus, pm_message_t state) -{ - ssb_chipco_suspend(&bus->chipco, state); - ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0); - - /* Reset HW state information in memory, so that HW is - * completely reinitialized on resume. */ - bus->mapped_device = NULL; -#ifdef CONFIG_SSB_DRIVER_PCICORE - bus->pcicore.setup_done = 0; -#endif -} - -static int ssb_device_suspend(struct device *dev, pm_message_t state) -{ - struct ssb_device *ssb_dev = dev_to_ssb_dev(dev); - struct ssb_driver *ssb_drv; - struct ssb_bus *bus; - int err = 0; - - if (dev->driver) { - ssb_drv = drv_to_ssb_drv(dev->driver); - if (ssb_drv && ssb_drv->suspend) - err = ssb_drv->suspend(ssb_dev, state); - if (err) - goto out; - } - - bus = ssb_dev->bus; - bus->suspend_cnt++; - if (bus->suspend_cnt == bus->nr_devices) { - /* All devices suspended. Shutdown the bus. */ - ssb_bus_suspend(bus, state); - } - -out: - return err; -} - -#ifdef CONFIG_SSB_PCIHOST -int ssb_devices_freeze(struct ssb_bus *bus) -{ - struct ssb_device *dev; - struct ssb_driver *drv; - int err = 0; - int i; - pm_message_t state = PMSG_FREEZE; - - for (i = 0; i < bus->nr_devices; i++) { - dev = &(bus->devices[i]); - if (!dev->dev->driver) - continue; - if (!device_is_registered(dev->dev)) - continue; - drv = drv_to_ssb_drv(dev->dev->driver); - if (drv && drv->suspend) { - err = drv->suspend(dev, state); - if (err) - goto out; - } - } -out: - return err; -} - -int ssb_devices_thaw(struct ssb_bus *bus) -{ - struct ssb_device *dev; - struct ssb_driver *drv; - int err = 0; - int i; - - for (i = 0; i < bus->nr_devices; i++) { - dev = &(bus->devices[i]); - if (!dev->dev->driver) - continue; - if (!device_is_registered(dev->dev)) - continue; - drv = drv_to_ssb_drv(dev->dev->driver); - if (drv && drv->resume) { - err = drv->resume(dev); - if (err) - goto out; - } - } -out: - return err; -} -#endif /* CONFIG_SSB_PCIHOST */ - -static void ssb_device_shutdown(struct device *dev) -{ - struct ssb_device *ssb_dev = dev_to_ssb_dev(dev); - struct ssb_driver *ssb_drv; - - if (!dev->driver) - return; - ssb_drv = drv_to_ssb_drv(dev->driver); - if (ssb_drv && ssb_drv->shutdown) - ssb_drv->shutdown(ssb_dev); -} - -static int ssb_device_remove(struct device *dev) -{ - struct ssb_device *ssb_dev = dev_to_ssb_dev(dev); - struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver); - - if (ssb_drv && ssb_drv->remove) - ssb_drv->remove(ssb_dev); - ssb_device_put(ssb_dev); - - return 0; -} - -static int ssb_device_probe(struct device *dev) -{ - struct ssb_device *ssb_dev = dev_to_ssb_dev(dev); - struct ssb_driver *ssb_drv = drv_to_ssb_drv(dev->driver); - int err = 0; - - ssb_device_get(ssb_dev); - if (ssb_drv && ssb_drv->probe) - err = ssb_drv->probe(ssb_dev, &ssb_dev->id); - if (err) - ssb_device_put(ssb_dev); - - return err; -} - -static int ssb_match_devid(const struct ssb_device_id *tabid, - const struct ssb_device_id *devid) -{ - if ((tabid->vendor != devid->vendor) && - tabid->vendor != SSB_ANY_VENDOR) - return 0; - if ((tabid->coreid != devid->coreid) && - tabid->coreid != SSB_ANY_ID) - return 0; - if ((tabid->revision != devid->revision) && - tabid->revision != SSB_ANY_REV) - return 0; - return 1; -} - -static int ssb_bus_match(struct device *dev, struct device_driver *drv) -{ - struct ssb_device *ssb_dev = dev_to_ssb_dev(dev); - struct ssb_driver *ssb_drv = drv_to_ssb_drv(drv); - const struct ssb_device_id *id; - - for (id = ssb_drv->id_table; - id->vendor || id->coreid || id->revision; - id++) { - if (ssb_match_devid(id, &ssb_dev->id)) - return 1; /* found */ - } - - return 0; -} - -static struct bus_type ssb_bustype = { - .name = NULL, /* Intentionally NULL to indicate early boot */ - .match = ssb_bus_match, - .probe = ssb_device_probe, - .remove = ssb_device_remove, - .shutdown = ssb_device_shutdown, - .suspend = ssb_device_suspend, - .resume = ssb_device_resume, -}; - -#define is_early_boot() (ssb_bustype.name == NULL) - -static void ssb_buses_lock(void) -{ - if (!is_early_boot()) - mutex_lock(&buses_mutex); -} - -static void ssb_buses_unlock(void) -{ - if (!is_early_boot()) - mutex_unlock(&buses_mutex); -} - -static void ssb_devices_unregister(struct ssb_bus *bus) -{ - struct ssb_device *sdev; - int i; - - for (i = bus->nr_devices - 1; i >= 0; i--) { - sdev = &(bus->devices[i]); - if (sdev->dev) - device_unregister(sdev->dev); - } -} - -void ssb_bus_unregister(struct ssb_bus *bus) -{ - ssb_buses_lock(); - ssb_devices_unregister(bus); - list_del(&bus->list); - ssb_buses_unlock(); - - /* ssb_pcmcia_exit(bus); */ - ssb_pci_exit(bus); - ssb_iounmap(bus); -} -EXPORT_SYMBOL(ssb_bus_unregister); - -static void ssb_release_dev(struct device *dev) -{ - struct __ssb_dev_wrapper *devwrap; - - devwrap = container_of(dev, struct __ssb_dev_wrapper, dev); - kfree(devwrap); -} - -static int ssb_devices_register(struct ssb_bus *bus) -{ - struct ssb_device *sdev; - struct device *dev; - struct __ssb_dev_wrapper *devwrap; - int i, err = 0; - int dev_idx = 0; - - for (i = 0; i < bus->nr_devices; i++) { - sdev = &(bus->devices[i]); - - /* We don't register SSB-system devices to the kernel, - * as the drivers for them are built into SSB. */ - switch (sdev->id.coreid) { - case SSB_DEV_CHIPCOMMON: - case SSB_DEV_PCI: - case SSB_DEV_PCIE: - case SSB_DEV_PCMCIA: - case SSB_DEV_MIPS: - case SSB_DEV_MIPS_3302: - case SSB_DEV_EXTIF: - continue; - } - - devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL); - if (!devwrap) { - ssb_printk(KERN_ERR PFX - "Could not allocate device\n"); - err = -ENOMEM; - goto error; - } - dev = &devwrap->dev; - devwrap->sdev = sdev; - - dev->release = ssb_release_dev; - dev->bus = &ssb_bustype; - snprintf(dev->bus_id, sizeof(dev->bus_id), - "ssb%u:%d", bus->busnumber, dev_idx); - - switch (bus->bustype) { - case SSB_BUSTYPE_PCI: -#ifdef CONFIG_SSB_PCIHOST - sdev->irq = bus->host_pci->irq; - dev->parent = &bus->host_pci->dev; -#endif - break; - case SSB_BUSTYPE_PCMCIA: -#ifdef CONFIG_SSB_PCMCIAHOST - dev->parent = &bus->host_pcmcia->dev; -#endif - break; - case SSB_BUSTYPE_SSB: - break; - } - - sdev->dev = dev; - err = device_register(dev); - if (err) { - ssb_printk(KERN_ERR PFX - "Could not register %s\n", - dev->bus_id); - /* Set dev to NULL to not unregister - * dev on error unwinding. */ - sdev->dev = NULL; - kfree(devwrap); - goto error; - } - dev_idx++; - } - - return 0; -error: - /* Unwind the already registered devices. */ - ssb_devices_unregister(bus); - return err; -} - -/* Needs ssb_buses_lock() */ -static int ssb_attach_queued_buses(void) -{ - struct ssb_bus *bus, *n; - int err = 0; - int drop_them_all = 0; - - list_for_each_entry_safe(bus, n, &attach_queue, list) { - if (drop_them_all) { - list_del(&bus->list); - continue; - } - /* Can't init the PCIcore in ssb_bus_register(), as that - * is too early in boot for embedded systems - * (no udelay() available). So do it here in attach stage. - */ - ssb_pcicore_init(&bus->pcicore); - - err = ssb_devices_register(bus); - if (err) { - drop_them_all = 1; - list_del(&bus->list); - continue; - } - list_move_tail(&bus->list, &buses); - } - - return err; -} - -static u16 ssb_ssb_read16(struct ssb_device *dev, u16 offset) -{ - struct ssb_bus *bus = dev->bus; - - offset += dev->core_index * SSB_CORE_SIZE; - return readw(bus->mmio + offset); -} - -static u32 ssb_ssb_read32(struct ssb_device *dev, u16 offset) -{ - struct ssb_bus *bus = dev->bus; - - offset += dev->core_index * SSB_CORE_SIZE; - return readl(bus->mmio + offset); -} - -static void ssb_ssb_write16(struct ssb_device *dev, u16 offset, u16 value) -{ - struct ssb_bus *bus = dev->bus; - - offset += dev->core_index * SSB_CORE_SIZE; - writew(value, bus->mmio + offset); -} - -static void ssb_ssb_write32(struct ssb_device *dev, u16 offset, u32 value) -{ - struct ssb_bus *bus = dev->bus; - - offset += dev->core_index * SSB_CORE_SIZE; - writel(value, bus->mmio + offset); -} - -static const struct ssb_bus_ops ssb_ssb_ops = { - .read16 = ssb_ssb_read16, - .read32 = ssb_ssb_read32, - .write16 = ssb_ssb_write16, - .write32 = ssb_ssb_write32, -}; - -static int ssb_fetch_invariants(struct ssb_bus *bus, - int (*get_invariants)(struct ssb_bus *bus, - struct ssb_init_invariants *iv)) -{ - struct ssb_init_invariants iv; - int err; - - memset(&iv, 0, sizeof(iv)); - err = get_invariants(bus, &iv); - if (err) - goto out; - memcpy(&bus->boardinfo, &iv.boardinfo, sizeof(iv.boardinfo)); - memcpy(&bus->sprom, &iv.sprom, sizeof(iv.sprom)); -out: - return err; -} - -static int ssb_bus_register(struct ssb_bus *bus, - int (*get_invariants)(struct ssb_bus *bus, - struct ssb_init_invariants *iv), - unsigned long baseaddr) -{ - int err; - - spin_lock_init(&bus->bar_lock); - INIT_LIST_HEAD(&bus->list); - - /* Powerup the bus */ - err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1); - if (err) - goto out; - ssb_buses_lock(); - bus->busnumber = next_busnumber; - /* Scan for devices (cores) */ - err = ssb_bus_scan(bus, baseaddr); - if (err) - goto err_disable_xtal; - - /* Init PCI-host device (if any) */ - err = ssb_pci_init(bus); - if (err) - goto err_unmap; - /* Init PCMCIA-host device (if any) */ - err = ssb_pcmcia_init(bus); - if (err) - goto err_pci_exit; - - /* Initialize basic system devices (if available) */ - ssb_chipcommon_init(&bus->chipco); - ssb_mipscore_init(&bus->mipscore); - err = ssb_fetch_invariants(bus, get_invariants); - if (err) - goto err_pcmcia_exit; - - /* Queue it for attach */ - list_add_tail(&bus->list, &attach_queue); - if (!is_early_boot()) { - /* This is not early boot, so we must attach the bus now */ - err = ssb_attach_queued_buses(); - if (err) - goto err_dequeue; - } - next_busnumber++; - ssb_buses_unlock(); - -out: - return err; - -err_dequeue: - list_del(&bus->list); -err_pcmcia_exit: -/* ssb_pcmcia_exit(bus); */ -err_pci_exit: - ssb_pci_exit(bus); -err_unmap: - ssb_iounmap(bus); -err_disable_xtal: - ssb_buses_unlock(); - ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0); - return err; -} - -#ifdef CONFIG_SSB_PCIHOST -int ssb_bus_pcibus_register(struct ssb_bus *bus, - struct pci_dev *host_pci) -{ - int err; - - bus->bustype = SSB_BUSTYPE_PCI; - bus->host_pci = host_pci; - bus->ops = &ssb_pci_ops; - - err = ssb_bus_register(bus, ssb_pci_get_invariants, 0); - if (!err) { - ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on " - "PCI device %s\n", host_pci->dev.bus_id); - } - - return err; -} -EXPORT_SYMBOL(ssb_bus_pcibus_register); -#endif /* CONFIG_SSB_PCIHOST */ - -#ifdef CONFIG_SSB_PCMCIAHOST -int ssb_bus_pcmciabus_register(struct ssb_bus *bus, - struct pcmcia_device *pcmcia_dev, - unsigned long baseaddr) -{ - int err; - - bus->bustype = SSB_BUSTYPE_PCMCIA; - bus->host_pcmcia = pcmcia_dev; - bus->ops = &ssb_pcmcia_ops; - - err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr); - if (!err) { - ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on " - "PCMCIA device %s\n", pcmcia_dev->devname); - } - - return err; -} -EXPORT_SYMBOL(ssb_bus_pcmciabus_register); -#endif /* CONFIG_SSB_PCMCIAHOST */ - -int ssb_bus_ssbbus_register(struct ssb_bus *bus, - unsigned long baseaddr, - int (*get_invariants)(struct ssb_bus *bus, - struct ssb_init_invariants *iv)) -{ - int err; - - bus->bustype = SSB_BUSTYPE_SSB; - bus->ops = &ssb_ssb_ops; - - err = ssb_bus_register(bus, get_invariants, baseaddr); - if (!err) { - ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at " - "address 0x%08lX\n", baseaddr); - } - - return err; -} - -int __ssb_driver_register(struct ssb_driver *drv, struct module *owner) -{ - drv->drv.name = drv->name; - drv->drv.bus = &ssb_bustype; - drv->drv.owner = owner; - - return driver_register(&drv->drv); -} -EXPORT_SYMBOL(__ssb_driver_register); - -void ssb_driver_unregister(struct ssb_driver *drv) -{ - driver_unregister(&drv->drv); -} -EXPORT_SYMBOL(ssb_driver_unregister); - -void ssb_set_devtypedata(struct ssb_device *dev, void *data) -{ - struct ssb_bus *bus = dev->bus; - struct ssb_device *ent; - int i; - - for (i = 0; i < bus->nr_devices; i++) { - ent = &(bus->devices[i]); - if (ent->id.vendor != dev->id.vendor) - continue; - if (ent->id.coreid != dev->id.coreid) - continue; - - ent->devtypedata = data; - } -} -EXPORT_SYMBOL(ssb_set_devtypedata); - -static u32 clkfactor_f6_resolve(u32 v) -{ - /* map the magic values */ - switch (v) { - case SSB_CHIPCO_CLK_F6_2: - return 2; - case SSB_CHIPCO_CLK_F6_3: - return 3; - case SSB_CHIPCO_CLK_F6_4: - return 4; - case SSB_CHIPCO_CLK_F6_5: - return 5; - case SSB_CHIPCO_CLK_F6_6: - return 6; - case SSB_CHIPCO_CLK_F6_7: - return 7; - } - return 0; -} - -/* Calculate the speed the backplane would run at a given set of clockcontrol values */ -u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m) -{ - u32 n1, n2, clock, m1, m2, m3, mc; - - n1 = (n & SSB_CHIPCO_CLK_N1); - n2 = ((n & SSB_CHIPCO_CLK_N2) >> SSB_CHIPCO_CLK_N2_SHIFT); - - switch (plltype) { - case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */ - if (m & SSB_CHIPCO_CLK_T6_MMASK) - return SSB_CHIPCO_CLK_T6_M0; - return SSB_CHIPCO_CLK_T6_M1; - case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */ - case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */ - case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */ - case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */ - n1 = clkfactor_f6_resolve(n1); - n2 += SSB_CHIPCO_CLK_F5_BIAS; - break; - case SSB_PLLTYPE_2: /* 48Mhz, 4 dividers */ - n1 += SSB_CHIPCO_CLK_T2_BIAS; - n2 += SSB_CHIPCO_CLK_T2_BIAS; - assert((n1 >= 2) && (n1 <= 7)); - assert((n2 >= 5) && (n2 <= 23)); - break; - case SSB_PLLTYPE_5: /* 25Mhz, 4 dividers */ - return 100000000; - default: - assert(0); - } - - switch (plltype) { - case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */ - case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */ - clock = SSB_CHIPCO_CLK_BASE2 * n1 * n2; - break; - default: - clock = SSB_CHIPCO_CLK_BASE1 * n1 * n2; - } - if (!clock) - return 0; - - m1 = (m & SSB_CHIPCO_CLK_M1); - m2 = ((m & SSB_CHIPCO_CLK_M2) >> SSB_CHIPCO_CLK_M2_SHIFT); - m3 = ((m & SSB_CHIPCO_CLK_M3) >> SSB_CHIPCO_CLK_M3_SHIFT); - mc = ((m & SSB_CHIPCO_CLK_MC) >> SSB_CHIPCO_CLK_MC_SHIFT); - - switch (plltype) { - case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */ - case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */ - case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */ - case SSB_PLLTYPE_7: /* 25Mhz, 4 dividers */ - m1 = clkfactor_f6_resolve(m1); - if ((plltype == SSB_PLLTYPE_1) || - (plltype == SSB_PLLTYPE_3)) - m2 += SSB_CHIPCO_CLK_F5_BIAS; - else - m2 = clkfactor_f6_resolve(m2); - m3 = clkfactor_f6_resolve(m3); - - switch (mc) { - case SSB_CHIPCO_CLK_MC_BYPASS: - return clock; - case SSB_CHIPCO_CLK_MC_M1: - return (clock / m1); - case SSB_CHIPCO_CLK_MC_M1M2: - return (clock / (m1 * m2)); - case SSB_CHIPCO_CLK_MC_M1M2M3: - return (clock / (m1 * m2 * m3)); - case SSB_CHIPCO_CLK_MC_M1M3: - return (clock / (m1 * m3)); - } - return 0; - case SSB_PLLTYPE_2: - m1 += SSB_CHIPCO_CLK_T2_BIAS; - m2 += SSB_CHIPCO_CLK_T2M2_BIAS; - m3 += SSB_CHIPCO_CLK_T2_BIAS; - assert((m1 >= 2) && (m1 <= 7)); - assert((m2 >= 3) && (m2 <= 10)); - assert((m3 >= 2) && (m3 <= 7)); - - if (!(mc & SSB_CHIPCO_CLK_T2MC_M1BYP)) - clock /= m1; - if (!(mc & SSB_CHIPCO_CLK_T2MC_M2BYP)) - clock /= m2; - if (!(mc & SSB_CHIPCO_CLK_T2MC_M3BYP)) - clock /= m3; - return clock; - default: - assert(0); - } - return 0; -} - -/* Get the current speed the backplane is running at */ -u32 ssb_clockspeed(struct ssb_bus *bus) -{ - u32 rate; - u32 plltype; - u32 clkctl_n, clkctl_m; - - //TODO if EXTIF: PLLTYPE == 1, read n from clockcontrol_n, m from clockcontrol_sb - - if (bus->chipco.dev) { - ssb_chipco_get_clockcontrol(&bus->chipco, &plltype, - &clkctl_n, &clkctl_m); - } else - return 0; - - if (bus->chip_id == 0x5365) { - rate = 100000000; - } else { - rate = ssb_calc_clock_rate(plltype, clkctl_n, clkctl_m); - if (plltype == SSB_PLLTYPE_3) /* 25Mhz, 2 dividers */ - rate /= 2; - } - - return rate; -} -EXPORT_SYMBOL(ssb_clockspeed); - -static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev) -{ - /* The REJECT bit changed position in TMSLOW between - * Backplane revisions. */ - switch (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV) { - case SSB_IDLOW_SSBREV_22: - return SSB_TMSLOW_REJECT_22; - case SSB_IDLOW_SSBREV_23: - return SSB_TMSLOW_REJECT_23; - default: - assert(0); - } - return (SSB_TMSLOW_REJECT_22 | SSB_TMSLOW_REJECT_23); -} - -int ssb_device_is_enabled(struct ssb_device *dev) -{ - u32 val; - u32 reject; - - reject = ssb_tmslow_reject_bitmask(dev); - val = ssb_read32(dev, SSB_TMSLOW); - val &= SSB_TMSLOW_CLOCK | SSB_TMSLOW_RESET | reject; - - return (val == SSB_TMSLOW_CLOCK); -} -EXPORT_SYMBOL(ssb_device_is_enabled); - -void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags) -{ - u32 val; - - ssb_device_disable(dev, core_specific_flags); - ssb_write32(dev, SSB_TMSLOW, - SSB_TMSLOW_RESET | SSB_TMSLOW_CLOCK | - SSB_TMSLOW_FGC | core_specific_flags); - /* flush */ - ssb_read32(dev, SSB_TMSLOW); - udelay(1); - - /* Clear SERR if set. This is a hw bug workaround. */ - if (ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_SERR) - ssb_write32(dev, SSB_TMSHIGH, 0); - - val = ssb_read32(dev, SSB_IMSTATE); - if (val & (SSB_IMSTATE_IBE | SSB_IMSTATE_TO)) { - val &= ~(SSB_IMSTATE_IBE | SSB_IMSTATE_TO); - ssb_write32(dev, SSB_IMSTATE, val); - } - - ssb_write32(dev, SSB_TMSLOW, - SSB_TMSLOW_CLOCK | SSB_TMSLOW_FGC | - core_specific_flags); - /* flush */ - ssb_read32(dev, SSB_TMSLOW); - udelay(1); - - ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_CLOCK | - core_specific_flags); - /* flush */ - ssb_read32(dev, SSB_TMSLOW); - udelay(1); -} -EXPORT_SYMBOL(ssb_device_enable); - -static int ssb_wait_bit(struct ssb_device *dev, u16 reg, u32 bitmask, - int timeout, int set) -{ - int i; - u32 val; - - for (i = 0; i < timeout; i++) { - val = ssb_read32(dev, reg); - if (set) { - if (val & bitmask) - return 0; - } else { - if (!(val & bitmask)) - return 0; - } - udelay(10); - } - printk(KERN_ERR PFX "Timeout waiting for bitmask %08X on " - "register %04X to %s.\n", - bitmask, reg, (set ? "set" : "clear")); - - return -ETIMEDOUT; -} - -void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags) -{ - u32 reject; - - if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET) - return; - - reject = ssb_tmslow_reject_bitmask(dev); - ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK); - ssb_wait_bit(dev, SSB_TMSLOW, reject, 1000, 1); - ssb_wait_bit(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0); - ssb_write32(dev, SSB_TMSLOW, - SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK | - reject | SSB_TMSLOW_RESET | - core_specific_flags); - /* flush */ - ssb_read32(dev, SSB_TMSLOW); - udelay(1); - - ssb_write32(dev, SSB_TMSLOW, - reject | SSB_TMSLOW_RESET | - core_specific_flags); - /* flush */ - ssb_read32(dev, SSB_TMSLOW); - udelay(1); -} -EXPORT_SYMBOL(ssb_device_disable); - -u32 ssb_dma_translation(struct ssb_device *dev) -{ - switch(dev->bus->bustype) { - case SSB_BUSTYPE_SSB: - return 0; - case SSB_BUSTYPE_PCI: - case SSB_BUSTYPE_PCMCIA: - return SSB_PCI_DMA; - } - return 0; -} -EXPORT_SYMBOL(ssb_dma_translation); - -int ssb_dma_set_mask(struct ssb_device *ssb_dev, u64 mask) -{ - struct device *dev = ssb_dev->dev; - -#ifdef CONFIG_SSB_PCIHOST - if (ssb_dev->bus->bustype == SSB_BUSTYPE_PCI && - !dma_supported(dev, mask)) - return -EIO; -#endif - dev->coherent_dma_mask = mask; - dev->dma_mask = &dev->coherent_dma_mask; - - return 0; -} -EXPORT_SYMBOL(ssb_dma_set_mask); - -int ssb_bus_may_powerdown(struct ssb_bus *bus) -{ - struct ssb_chipcommon *cc; - int err; - - /* On buses where more than one core may be working - * at a time, we must not powerdown stuff if there are - * still cores that may want to run. */ - if (bus->bustype == SSB_BUSTYPE_SSB) - return 0; - - cc = &bus->chipco; - ssb_chipco_set_clockmode(cc, SSB_CLKMODE_SLOW); - err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 0); - if (err) - goto error; - - return 0; -error: - ssb_printk(KERN_ERR PFX "Bus powerdown failed\n"); - return err; -} -EXPORT_SYMBOL(ssb_bus_may_powerdown); - -int ssb_bus_powerup(struct ssb_bus *bus, int dynamic_pctl) -{ - struct ssb_chipcommon *cc; - int err; - enum ssb_clkmode mode; - - err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1); - if (err) - goto error; - cc = &bus->chipco; - mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST; - ssb_chipco_set_clockmode(cc, mode); - - return 0; -error: - ssb_printk(KERN_ERR PFX "Bus powerup failed\n"); - return err; -} -EXPORT_SYMBOL(ssb_bus_powerup); - -u32 ssb_admatch_base(u32 adm) -{ - u32 base = 0; - - switch (adm & SSB_ADM_TYPE) { - case SSB_ADM_TYPE0: - base = (adm & SSB_ADM_BASE0); - break; - case SSB_ADM_TYPE1: - assert(!(adm & SSB_ADM_NEG)); /* unsupported */ - base = (adm & SSB_ADM_BASE1); - break; - case SSB_ADM_TYPE2: - assert(!(adm & SSB_ADM_NEG)); /* unsupported */ - base = (adm & SSB_ADM_BASE2); - break; - default: - assert(0); - } - - return base; -} -EXPORT_SYMBOL(ssb_admatch_base); - -u32 ssb_admatch_size(u32 adm) -{ - u32 size = 0; - - switch (adm & SSB_ADM_TYPE) { - case SSB_ADM_TYPE0: - size = ((adm & SSB_ADM_SZ0) >> SSB_ADM_SZ0_SHIFT); - break; - case SSB_ADM_TYPE1: - assert(!(adm & SSB_ADM_NEG)); /* unsupported */ - size = ((adm & SSB_ADM_SZ1) >> SSB_ADM_SZ1_SHIFT); - break; - case SSB_ADM_TYPE2: - assert(!(adm & SSB_ADM_NEG)); /* unsupported */ - size = ((adm & SSB_ADM_SZ2) >> SSB_ADM_SZ2_SHIFT); - break; - default: - assert(0); - } - size = (1 << (size + 1)); - - return size; -} -EXPORT_SYMBOL(ssb_admatch_size); - -static int __init ssb_modinit(void) -{ - int err; - - ssb_bustype.name = "ssb"; - err = bus_register(&ssb_bustype); - if (err) - return err; - - /* Maybe we already registered some buses at early boot. - * Check for this and attach them - */ - ssb_buses_lock(); - err = ssb_attach_queued_buses(); - ssb_buses_unlock(); - if (err) - bus_unregister(&ssb_bustype); - - return err; -} -subsys_initcall(ssb_modinit); - -static void __exit ssb_modexit(void) -{ - bus_unregister(&ssb_bustype); -} -module_exit(ssb_modexit) |