diff options
Diffstat (limited to 'drivers/staging/tidspbridge/rmgr/drv_interface.c')
| -rw-r--r-- | drivers/staging/tidspbridge/rmgr/drv_interface.c | 654 |
1 files changed, 654 insertions, 0 deletions
diff --git a/drivers/staging/tidspbridge/rmgr/drv_interface.c b/drivers/staging/tidspbridge/rmgr/drv_interface.c new file mode 100644 index 000000000000..34be43fec044 --- /dev/null +++ b/drivers/staging/tidspbridge/rmgr/drv_interface.c @@ -0,0 +1,654 @@ +/* + * drv_interface.c + * + * DSP-BIOS Bridge driver support functions for TI OMAP processors. + * + * DSP/BIOS Bridge driver interface. + * + * Copyright (C) 2005-2006 Texas Instruments, Inc. + * + * This package is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + */ + +/* ----------------------------------- Host OS */ + +#include <plat/dsp.h> + +#include <dspbridge/host_os.h> +#include <linux/types.h> +#include <linux/platform_device.h> +#include <linux/pm.h> + +#ifdef MODULE +#include <linux/module.h> +#endif + +#include <linux/device.h> +#include <linux/init.h> +#include <linux/moduleparam.h> +#include <linux/cdev.h> + +/* ----------------------------------- DSP/BIOS Bridge */ +#include <dspbridge/dbdefs.h> + +/* ----------------------------------- Trace & Debug */ +#include <dspbridge/dbc.h> + +/* ----------------------------------- OS Adaptation Layer */ +#include <dspbridge/clk.h> +#include <dspbridge/sync.h> + +/* ----------------------------------- Platform Manager */ +#include <dspbridge/dspapi-ioctl.h> +#include <dspbridge/dspapi.h> +#include <dspbridge/dspdrv.h> + +/* ----------------------------------- Resource Manager */ +#include <dspbridge/pwr.h> + +/* ----------------------------------- This */ +#include <drv_interface.h> + +#include <dspbridge/resourcecleanup.h> +#include <dspbridge/chnl.h> +#include <dspbridge/proc.h> +#include <dspbridge/dev.h> +#include <dspbridge/drvdefs.h> +#include <dspbridge/drv.h> + +#ifdef CONFIG_TIDSPBRIDGE_DVFS +#include <mach-omap2/omap3-opp.h> +#endif + +/* ----------------------------------- Globals */ +#define DRIVER_NAME "DspBridge" +#define DSPBRIDGE_VERSION "0.3" +s32 dsp_debug; + +struct platform_device *omap_dspbridge_dev; +struct device *bridge; + +/* This is a test variable used by Bridge to test different sleep states */ +s32 dsp_test_sleepstate; + +static struct cdev bridge_cdev; + +static struct class *bridge_class; + +static u32 driver_context; +static s32 driver_major; +static char *base_img; +char *iva_img; +static s32 shm_size = 0x500000; /* 5 MB */ +static int tc_wordswapon; /* Default value is always false */ +#ifdef CONFIG_TIDSPBRIDGE_RECOVERY +#define REC_TIMEOUT 5000 /*recovery timeout in msecs */ +static atomic_t bridge_cref; /* number of bridge open handles */ +static struct workqueue_struct *bridge_rec_queue; +static struct work_struct bridge_recovery_work; +static DECLARE_COMPLETION(bridge_comp); +static DECLARE_COMPLETION(bridge_open_comp); +static bool recover; +#endif + +#ifdef CONFIG_PM +struct omap34_xx_bridge_suspend_data { + int suspended; + wait_queue_head_t suspend_wq; +}; + +static struct omap34_xx_bridge_suspend_data bridge_suspend_data; + +static int omap34_xxbridge_suspend_lockout(struct omap34_xx_bridge_suspend_data + *s, struct file *f) +{ + if ((s)->suspended) { + if ((f)->f_flags & O_NONBLOCK) + return -EPERM; + wait_event_interruptible((s)->suspend_wq, (s)->suspended == 0); + } + return 0; +} +#endif + +module_param(dsp_debug, int, 0); +MODULE_PARM_DESC(dsp_debug, "Wait after loading DSP image. default = false"); + +module_param(dsp_test_sleepstate, int, 0); +MODULE_PARM_DESC(dsp_test_sleepstate, "DSP Sleep state = 0"); + +module_param(base_img, charp, 0); +MODULE_PARM_DESC(base_img, "DSP base image, default = NULL"); + +module_param(shm_size, int, 0); +MODULE_PARM_DESC(shm_size, "shm size, default = 4 MB, minimum = 64 KB"); + +module_param(tc_wordswapon, int, 0); +MODULE_PARM_DESC(tc_wordswapon, "TC Word Swap Option. default = 0"); + +MODULE_AUTHOR("Texas Instruments"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DSPBRIDGE_VERSION); + +static char *driver_name = DRIVER_NAME; + +static const struct file_operations bridge_fops = { + .open = bridge_open, + .release = bridge_release, + .unlocked_ioctl = bridge_ioctl, + .mmap = bridge_mmap, + .llseek = noop_llseek, +}; + +#ifdef CONFIG_PM +static u32 time_out = 1000; +#ifdef CONFIG_TIDSPBRIDGE_DVFS +s32 dsp_max_opps = VDD1_OPP5; +#endif + +/* Maximum Opps that can be requested by IVA */ +/*vdd1 rate table */ +#ifdef CONFIG_TIDSPBRIDGE_DVFS +const struct omap_opp vdd1_rate_table_bridge[] = { + {0, 0, 0}, + /*OPP1 */ + {S125M, VDD1_OPP1, 0}, + /*OPP2 */ + {S250M, VDD1_OPP2, 0}, + /*OPP3 */ + {S500M, VDD1_OPP3, 0}, + /*OPP4 */ + {S550M, VDD1_OPP4, 0}, + /*OPP5 */ + {S600M, VDD1_OPP5, 0}, +}; +#endif +#endif + +struct omap_dsp_platform_data *omap_dspbridge_pdata; + +u32 vdd1_dsp_freq[6][4] = { + {0, 0, 0, 0}, + /*OPP1 */ + {0, 90000, 0, 86000}, + /*OPP2 */ + {0, 180000, 80000, 170000}, + /*OPP3 */ + {0, 360000, 160000, 340000}, + /*OPP4 */ + {0, 396000, 325000, 376000}, + /*OPP5 */ + {0, 430000, 355000, 430000}, +}; + +#ifdef CONFIG_TIDSPBRIDGE_RECOVERY +static void bridge_recover(struct work_struct *work) +{ + struct dev_object *dev; + struct cfg_devnode *dev_node; + if (atomic_read(&bridge_cref)) { + INIT_COMPLETION(bridge_comp); + while (!wait_for_completion_timeout(&bridge_comp, + msecs_to_jiffies(REC_TIMEOUT))) + pr_info("%s:%d handle(s) still opened\n", + __func__, atomic_read(&bridge_cref)); + } + dev = dev_get_first(); + dev_get_dev_node(dev, &dev_node); + if (!dev_node || proc_auto_start(dev_node, dev)) + pr_err("DSP could not be restarted\n"); + recover = false; + complete_all(&bridge_open_comp); +} + +void bridge_recover_schedule(void) +{ + INIT_COMPLETION(bridge_open_comp); + recover = true; + queue_work(bridge_rec_queue, &bridge_recovery_work); +} +#endif +#ifdef CONFIG_TIDSPBRIDGE_DVFS +static int dspbridge_scale_notification(struct notifier_block *op, + unsigned long val, void *ptr) +{ + struct omap_dsp_platform_data *pdata = + omap_dspbridge_dev->dev.platform_data; + + if (CPUFREQ_POSTCHANGE == val && pdata->dsp_get_opp) + pwr_pm_post_scale(PRCM_VDD1, pdata->dsp_get_opp()); + + return 0; +} + +static struct notifier_block iva_clk_notifier = { + .notifier_call = dspbridge_scale_notification, + NULL, +}; +#endif + +/** + * omap3_bridge_startup() - perform low lever initializations + * @pdev: pointer to platform device + * + * Initializes recovery, PM and DVFS required data, before calling + * clk and memory init routines. + */ +static int omap3_bridge_startup(struct platform_device *pdev) +{ + struct omap_dsp_platform_data *pdata = pdev->dev.platform_data; + struct drv_data *drv_datap = NULL; + u32 phys_membase, phys_memsize; + int err; + +#ifdef CONFIG_TIDSPBRIDGE_RECOVERY + bridge_rec_queue = create_workqueue("bridge_rec_queue"); + INIT_WORK(&bridge_recovery_work, bridge_recover); + INIT_COMPLETION(bridge_comp); +#endif + +#ifdef CONFIG_PM + /* Initialize the wait queue */ + bridge_suspend_data.suspended = 0; + init_waitqueue_head(&bridge_suspend_data.suspend_wq); + +#ifdef CONFIG_TIDSPBRIDGE_DVFS + for (i = 0; i < 6; i++) + pdata->mpu_speed[i] = vdd1_rate_table_bridge[i].rate; + + err = cpufreq_register_notifier(&iva_clk_notifier, + CPUFREQ_TRANSITION_NOTIFIER); + if (err) + pr_err("%s: clk_notifier_register failed for iva2_ck\n", + __func__); +#endif +#endif + + dsp_clk_init(); + + drv_datap = kzalloc(sizeof(struct drv_data), GFP_KERNEL); + if (!drv_datap) { + err = -ENOMEM; + goto err1; + } + + drv_datap->shm_size = shm_size; + drv_datap->tc_wordswapon = tc_wordswapon; + + if (base_img) { + drv_datap->base_img = kmalloc(strlen(base_img) + 1, GFP_KERNEL); + if (!drv_datap->base_img) { + err = -ENOMEM; + goto err2; + } + strncpy(drv_datap->base_img, base_img, strlen(base_img) + 1); + } + + dev_set_drvdata(bridge, drv_datap); + + if (shm_size < 0x10000) { /* 64 KB */ + err = -EINVAL; + pr_err("%s: shm size must be at least 64 KB\n", __func__); + goto err3; + } + dev_dbg(bridge, "%s: requested shm_size = 0x%x\n", __func__, shm_size); + + phys_membase = pdata->phys_mempool_base; + phys_memsize = pdata->phys_mempool_size; + if (phys_membase > 0 && phys_memsize > 0) + mem_ext_phys_pool_init(phys_membase, phys_memsize); + + if (tc_wordswapon) + dev_dbg(bridge, "%s: TC Word Swap is enabled\n", __func__); + + driver_context = dsp_init(&err); + if (err) { + pr_err("DSP Bridge driver initialization failed\n"); + goto err4; + } + + return 0; + +err4: + mem_ext_phys_pool_release(); +err3: + kfree(drv_datap->base_img); +err2: + kfree(drv_datap); +err1: +#ifdef CONFIG_TIDSPBRIDGE_DVFS + cpufreq_unregister_notifier(&iva_clk_notifier, + CPUFREQ_TRANSITION_NOTIFIER); +#endif + dsp_clk_exit(); + + return err; +} + +static int __devinit omap34_xx_bridge_probe(struct platform_device *pdev) +{ + int err; + dev_t dev = 0; +#ifdef CONFIG_TIDSPBRIDGE_DVFS + int i = 0; +#endif + + omap_dspbridge_dev = pdev; + + /* Global bridge device */ + bridge = &omap_dspbridge_dev->dev; + + /* Bridge low level initializations */ + err = omap3_bridge_startup(pdev); + if (err) + goto err1; + + /* use 2.6 device model */ + err = alloc_chrdev_region(&dev, 0, 1, driver_name); + if (err) { + pr_err("%s: Can't get major %d\n", __func__, driver_major); + goto err1; + } + + cdev_init(&bridge_cdev, &bridge_fops); + bridge_cdev.owner = THIS_MODULE; + + err = cdev_add(&bridge_cdev, dev, 1); + if (err) { + pr_err("%s: Failed to add bridge device\n", __func__); + goto err2; + } + + /* udev support */ + bridge_class = class_create(THIS_MODULE, "ti_bridge"); + if (IS_ERR(bridge_class)) { + pr_err("%s: Error creating bridge class\n", __func__); + goto err3; + } + + driver_major = MAJOR(dev); + device_create(bridge_class, NULL, MKDEV(driver_major, 0), + NULL, "DspBridge"); + pr_info("DSP Bridge driver loaded\n"); + + return 0; + +err3: + cdev_del(&bridge_cdev); +err2: + unregister_chrdev_region(dev, 1); +err1: + return err; +} + +static int __devexit omap34_xx_bridge_remove(struct platform_device *pdev) +{ + dev_t devno; + bool ret; + int status = 0; + struct drv_data *drv_datap = dev_get_drvdata(bridge); + + /* Retrieve the Object handle from the driver data */ + if (!drv_datap || !drv_datap->drv_object) { + status = -ENODATA; + pr_err("%s: Failed to retrieve the object handle\n", __func__); + goto func_cont; + } + +#ifdef CONFIG_TIDSPBRIDGE_DVFS + if (cpufreq_unregister_notifier(&iva_clk_notifier, + CPUFREQ_TRANSITION_NOTIFIER)) + pr_err("%s: cpufreq_unregister_notifier failed for iva2_ck\n", + __func__); +#endif /* #ifdef CONFIG_TIDSPBRIDGE_DVFS */ + + if (driver_context) { + /* Put the DSP in reset state */ + ret = dsp_deinit(driver_context); + driver_context = 0; + DBC_ASSERT(ret == true); + } + +func_cont: + mem_ext_phys_pool_release(); + + dsp_clk_exit(); + + devno = MKDEV(driver_major, 0); + cdev_del(&bridge_cdev); + unregister_chrdev_region(devno, 1); + if (bridge_class) { + /* remove the device from sysfs */ + device_destroy(bridge_class, MKDEV(driver_major, 0)); + class_destroy(bridge_class); + + } + return 0; +} + +#ifdef CONFIG_PM +static int BRIDGE_SUSPEND(struct platform_device *pdev, pm_message_t state) +{ + u32 status; + u32 command = PWR_EMERGENCYDEEPSLEEP; + + status = pwr_sleep_dsp(command, time_out); + if (status) + return -1; + + bridge_suspend_data.suspended = 1; + return 0; +} + +static int BRIDGE_RESUME(struct platform_device *pdev) +{ + u32 status; + + status = pwr_wake_dsp(time_out); + if (status) + return -1; + + bridge_suspend_data.suspended = 0; + wake_up(&bridge_suspend_data.suspend_wq); + return 0; +} +#else +#define BRIDGE_SUSPEND NULL +#define BRIDGE_RESUME NULL +#endif + +static struct platform_driver bridge_driver = { + .driver = { + .name = "omap-dsp", + }, + .probe = omap34_xx_bridge_probe, + .remove = __devexit_p(omap34_xx_bridge_remove), + .suspend = BRIDGE_SUSPEND, + .resume = BRIDGE_RESUME, +}; + +static int __init bridge_init(void) +{ + return platform_driver_register(&bridge_driver); +} + +static void __exit bridge_exit(void) +{ + platform_driver_unregister(&bridge_driver); +} + +/* + * This function is called when an application opens handle to the + * bridge driver. + */ +static int bridge_open(struct inode *ip, struct file *filp) +{ + int status = 0; + struct process_context *pr_ctxt = NULL; + + /* + * Allocate a new process context and insert it into global + * process context list. + */ + +#ifdef CONFIG_TIDSPBRIDGE_RECOVERY + if (recover) { + if (filp->f_flags & O_NONBLOCK || + wait_for_completion_interruptible(&bridge_open_comp)) + return -EBUSY; + } +#endif + pr_ctxt = kzalloc(sizeof(struct process_context), GFP_KERNEL); + if (pr_ctxt) { + pr_ctxt->res_state = PROC_RES_ALLOCATED; + spin_lock_init(&pr_ctxt->dmm_map_lock); + INIT_LIST_HEAD(&pr_ctxt->dmm_map_list); + + pr_ctxt->node_id = kzalloc(sizeof(struct idr), GFP_KERNEL); + if (pr_ctxt->node_id) { + idr_init(pr_ctxt->node_id); + } else { + status = -ENOMEM; + goto err; + } + + pr_ctxt->stream_id = kzalloc(sizeof(struct idr), GFP_KERNEL); + if (pr_ctxt->stream_id) + idr_init(pr_ctxt->stream_id); + else + status = -ENOMEM; + } else { + status = -ENOMEM; + } +err: + filp->private_data = pr_ctxt; +#ifdef CONFIG_TIDSPBRIDGE_RECOVERY + if (!status) + atomic_inc(&bridge_cref); +#endif + return status; +} + +/* + * This function is called when an application closes handle to the bridge + * driver. + */ +static int bridge_release(struct inode *ip, struct file *filp) +{ + int status = 0; + struct process_context *pr_ctxt; + + if (!filp->private_data) { + status = -EIO; + goto err; + } + + pr_ctxt = filp->private_data; + flush_signals(current); + drv_remove_all_resources(pr_ctxt); + proc_detach(pr_ctxt); + kfree(pr_ctxt); + + filp->private_data = NULL; + +err: +#ifdef CONFIG_TIDSPBRIDGE_RECOVERY + if (!atomic_dec_return(&bridge_cref)) + complete(&bridge_comp); +#endif + return status; +} + +/* This function provides IO interface to the bridge driver. */ +static long bridge_ioctl(struct file *filp, unsigned int code, + unsigned long args) +{ + int status; + u32 retval = 0; + union trapped_args buf_in; + + DBC_REQUIRE(filp != NULL); +#ifdef CONFIG_TIDSPBRIDGE_RECOVERY + if (recover) { + status = -EIO; + goto err; + } +#endif +#ifdef CONFIG_PM + status = omap34_xxbridge_suspend_lockout(&bridge_suspend_data, filp); + if (status != 0) + return status; +#endif + + if (!filp->private_data) { + status = -EIO; + goto err; + } + + status = copy_from_user(&buf_in, (union trapped_args *)args, + sizeof(union trapped_args)); + + if (!status) { + status = api_call_dev_ioctl(code, &buf_in, &retval, + filp->private_data); + + if (!status) { + status = retval; + } else { + dev_dbg(bridge, "%s: IOCTL Failed, code: 0x%x " + "status 0x%x\n", __func__, code, status); + status = -1; + } + + } + +err: + return status; +} + +/* This function maps kernel space memory to user space memory. */ +static int bridge_mmap(struct file *filp, struct vm_area_struct *vma) +{ + u32 offset = vma->vm_pgoff << PAGE_SHIFT; + u32 status; + + DBC_ASSERT(vma->vm_start < vma->vm_end); + + vma->vm_flags |= VM_RESERVED | VM_IO; + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + + dev_dbg(bridge, "%s: vm filp %p offset %x start %lx end %lx page_prot " + "%lx flags %lx\n", __func__, filp, offset, + vma->vm_start, vma->vm_end, vma->vm_page_prot, vma->vm_flags); + + status = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, + vma->vm_end - vma->vm_start, + vma->vm_page_prot); + if (status != 0) + status = -EAGAIN; + + return status; +} + +/* To remove all process resources before removing the process from the + * process context list */ +int drv_remove_all_resources(void *process_ctxt) +{ + int status = 0; + struct process_context *ctxt = (struct process_context *)process_ctxt; + drv_remove_all_strm_res_elements(ctxt); + drv_remove_all_node_res_elements(ctxt); + drv_remove_all_dmm_res_elements(ctxt); + ctxt->res_state = PROC_RES_FREED; + return status; +} + +/* Bridge driver initialization and de-initialization functions */ +module_init(bridge_init); +module_exit(bridge_exit); |