4 * DSP-BIOS Bridge driver support functions for TI OMAP processors.
6 * DSP/BIOS Bridge driver interface.
8 * Copyright (C) 2005-2006 Texas Instruments, Inc.
10 * This package is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
16 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19 #include <linux/platform_data/dsp-omap.h>
21 #include <linux/types.h>
22 #include <linux/platform_device.h>
24 #include <linux/module.h>
25 #include <linux/device.h>
26 #include <linux/init.h>
27 #include <linux/moduleparam.h>
28 #include <linux/cdev.h>
30 /* ----------------------------------- DSP/BIOS Bridge */
31 #include <dspbridge/dbdefs.h>
33 /* ----------------------------------- OS Adaptation Layer */
34 #include <dspbridge/clk.h>
36 /* ----------------------------------- Platform Manager */
37 #include <dspbridge/dspapi.h>
38 #include <dspbridge/dspdrv.h>
40 /* ----------------------------------- Resource Manager */
41 #include <dspbridge/pwr.h>
43 #include <dspbridge/resourcecleanup.h>
44 #include <dspbridge/proc.h>
45 #include <dspbridge/dev.h>
47 #ifdef CONFIG_TIDSPBRIDGE_DVFS
48 #include <mach-omap2/omap3-opp.h>
51 /* ----------------------------------- Globals */
52 #define DSPBRIDGE_VERSION "0.3"
55 struct platform_device *omap_dspbridge_dev;
56 struct device *bridge;
58 /* This is a test variable used by Bridge to test different sleep states */
59 s32 dsp_test_sleepstate;
61 static struct cdev bridge_cdev;
63 static struct class *bridge_class;
65 static u32 driver_context;
66 static s32 driver_major;
67 static char *base_img;
69 static s32 shm_size = 0x500000; /* 5 MB */
70 static int tc_wordswapon; /* Default value is always false */
71 #ifdef CONFIG_TIDSPBRIDGE_RECOVERY
72 #define REC_TIMEOUT 5000 /*recovery timeout in msecs */
73 static atomic_t bridge_cref; /* number of bridge open handles */
74 static struct workqueue_struct *bridge_rec_queue;
75 static struct work_struct bridge_recovery_work;
76 static DECLARE_COMPLETION(bridge_comp);
77 static DECLARE_COMPLETION(bridge_open_comp);
82 struct omap34_xx_bridge_suspend_data {
84 wait_queue_head_t suspend_wq;
87 static struct omap34_xx_bridge_suspend_data bridge_suspend_data;
89 static int omap34_xxbridge_suspend_lockout(struct omap34_xx_bridge_suspend_data
93 if ((f)->f_flags & O_NONBLOCK)
95 wait_event_interruptible((s)->suspend_wq, (s)->suspended == 0);
101 module_param(dsp_debug, int, 0);
102 MODULE_PARM_DESC(dsp_debug, "Wait after loading DSP image. default = false");
104 module_param(dsp_test_sleepstate, int, 0);
105 MODULE_PARM_DESC(dsp_test_sleepstate, "DSP Sleep state = 0");
107 module_param(base_img, charp, 0);
108 MODULE_PARM_DESC(base_img, "DSP base image, default = NULL");
110 module_param(shm_size, int, 0);
111 MODULE_PARM_DESC(shm_size, "shm size, default = 4 MB, minimum = 64 KB");
113 module_param(tc_wordswapon, int, 0);
114 MODULE_PARM_DESC(tc_wordswapon, "TC Word Swap Option. default = 0");
116 MODULE_AUTHOR("Texas Instruments");
117 MODULE_LICENSE("GPL");
118 MODULE_VERSION(DSPBRIDGE_VERSION);
121 * This function is called when an application opens handle to the
124 static int bridge_open(struct inode *ip, struct file *filp)
127 struct process_context *pr_ctxt = NULL;
130 * Allocate a new process context and insert it into global
131 * process context list.
134 #ifdef CONFIG_TIDSPBRIDGE_RECOVERY
136 if (filp->f_flags & O_NONBLOCK ||
137 wait_for_completion_interruptible(&bridge_open_comp))
141 pr_ctxt = kzalloc(sizeof(struct process_context), GFP_KERNEL);
145 pr_ctxt->res_state = PROC_RES_ALLOCATED;
146 spin_lock_init(&pr_ctxt->dmm_map_lock);
147 INIT_LIST_HEAD(&pr_ctxt->dmm_map_list);
148 spin_lock_init(&pr_ctxt->dmm_rsv_lock);
149 INIT_LIST_HEAD(&pr_ctxt->dmm_rsv_list);
151 pr_ctxt->node_id = kzalloc(sizeof(struct idr), GFP_KERNEL);
152 if (!pr_ctxt->node_id) {
157 idr_init(pr_ctxt->node_id);
159 pr_ctxt->stream_id = kzalloc(sizeof(struct idr), GFP_KERNEL);
160 if (!pr_ctxt->stream_id) {
165 idr_init(pr_ctxt->stream_id);
167 filp->private_data = pr_ctxt;
169 #ifdef CONFIG_TIDSPBRIDGE_RECOVERY
170 atomic_inc(&bridge_cref);
175 kfree(pr_ctxt->node_id);
182 * This function is called when an application closes handle to the bridge
185 static int bridge_release(struct inode *ip, struct file *filp)
188 struct process_context *pr_ctxt;
190 if (!filp->private_data) {
195 pr_ctxt = filp->private_data;
196 flush_signals(current);
197 drv_remove_all_resources(pr_ctxt);
198 proc_detach(pr_ctxt);
199 kfree(pr_ctxt->node_id);
200 kfree(pr_ctxt->stream_id);
203 filp->private_data = NULL;
206 #ifdef CONFIG_TIDSPBRIDGE_RECOVERY
207 if (!atomic_dec_return(&bridge_cref))
208 complete(&bridge_comp);
213 /* This function provides IO interface to the bridge driver. */
214 static long bridge_ioctl(struct file *filp, unsigned int code,
219 union trapped_args buf_in;
221 #ifdef CONFIG_TIDSPBRIDGE_RECOVERY
228 status = omap34_xxbridge_suspend_lockout(&bridge_suspend_data, filp);
233 if (!filp->private_data) {
238 status = copy_from_user(&buf_in, (union trapped_args *)args,
239 sizeof(union trapped_args));
242 status = api_call_dev_ioctl(code, &buf_in, &retval,
248 dev_dbg(bridge, "%s: IOCTL Failed, code: 0x%x "
249 "status 0x%x\n", __func__, code, status);
259 /* This function maps kernel space memory to user space memory. */
260 static int bridge_mmap(struct file *filp, struct vm_area_struct *vma)
264 /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by remap_pfn_range() */
265 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
267 dev_dbg(bridge, "%s: vm filp %p start %lx end %lx page_prot %ulx "
268 "flags %lx\n", __func__, filp,
269 vma->vm_start, vma->vm_end, vma->vm_page_prot,
272 status = remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
273 vma->vm_end - vma->vm_start,
281 static const struct file_operations bridge_fops = {
283 .release = bridge_release,
284 .unlocked_ioctl = bridge_ioctl,
286 .llseek = noop_llseek,
290 static u32 time_out = 1000;
291 #ifdef CONFIG_TIDSPBRIDGE_DVFS
292 s32 dsp_max_opps = VDD1_OPP5;
295 /* Maximum Opps that can be requested by IVA */
297 #ifdef CONFIG_TIDSPBRIDGE_DVFS
298 const struct omap_opp vdd1_rate_table_bridge[] = {
301 {S125M, VDD1_OPP1, 0},
303 {S250M, VDD1_OPP2, 0},
305 {S500M, VDD1_OPP3, 0},
307 {S550M, VDD1_OPP4, 0},
309 {S600M, VDD1_OPP5, 0},
314 struct omap_dsp_platform_data *omap_dspbridge_pdata;
316 u32 vdd1_dsp_freq[6][4] = {
319 {0, 90000, 0, 86000},
321 {0, 180000, 80000, 170000},
323 {0, 360000, 160000, 340000},
325 {0, 396000, 325000, 376000},
327 {0, 430000, 355000, 430000},
330 #ifdef CONFIG_TIDSPBRIDGE_RECOVERY
331 static void bridge_recover(struct work_struct *work)
333 struct dev_object *dev;
334 struct cfg_devnode *dev_node;
335 if (atomic_read(&bridge_cref)) {
336 INIT_COMPLETION(bridge_comp);
337 while (!wait_for_completion_timeout(&bridge_comp,
338 msecs_to_jiffies(REC_TIMEOUT)))
339 pr_info("%s:%d handle(s) still opened\n",
340 __func__, atomic_read(&bridge_cref));
342 dev = dev_get_first();
343 dev_get_dev_node(dev, &dev_node);
344 if (!dev_node || proc_auto_start(dev_node, dev))
345 pr_err("DSP could not be restarted\n");
347 complete_all(&bridge_open_comp);
350 void bridge_recover_schedule(void)
352 INIT_COMPLETION(bridge_open_comp);
354 queue_work(bridge_rec_queue, &bridge_recovery_work);
357 #ifdef CONFIG_TIDSPBRIDGE_DVFS
358 static int dspbridge_scale_notification(struct notifier_block *op,
359 unsigned long val, void *ptr)
361 struct omap_dsp_platform_data *pdata =
362 omap_dspbridge_dev->dev.platform_data;
364 if (CPUFREQ_POSTCHANGE == val && pdata->dsp_get_opp)
365 pwr_pm_post_scale(PRCM_VDD1, pdata->dsp_get_opp());
370 static struct notifier_block iva_clk_notifier = {
371 .notifier_call = dspbridge_scale_notification,
377 * omap3_bridge_startup() - perform low lever initializations
378 * @pdev: pointer to platform device
380 * Initializes recovery, PM and DVFS required data, before calling
381 * clk and memory init routines.
383 static int omap3_bridge_startup(struct platform_device *pdev)
385 struct omap_dsp_platform_data *pdata = pdev->dev.platform_data;
386 struct drv_data *drv_datap = NULL;
387 u32 phys_membase, phys_memsize;
390 #ifdef CONFIG_TIDSPBRIDGE_RECOVERY
391 bridge_rec_queue = create_workqueue("bridge_rec_queue");
392 INIT_WORK(&bridge_recovery_work, bridge_recover);
393 INIT_COMPLETION(bridge_comp);
397 /* Initialize the wait queue */
398 bridge_suspend_data.suspended = 0;
399 init_waitqueue_head(&bridge_suspend_data.suspend_wq);
401 #ifdef CONFIG_TIDSPBRIDGE_DVFS
402 for (i = 0; i < 6; i++)
403 pdata->mpu_speed[i] = vdd1_rate_table_bridge[i].rate;
405 err = cpufreq_register_notifier(&iva_clk_notifier,
406 CPUFREQ_TRANSITION_NOTIFIER);
408 pr_err("%s: clk_notifier_register failed for iva2_ck\n",
415 drv_datap = kzalloc(sizeof(struct drv_data), GFP_KERNEL);
421 drv_datap->shm_size = shm_size;
422 drv_datap->tc_wordswapon = tc_wordswapon;
425 drv_datap->base_img = kmalloc(strlen(base_img) + 1, GFP_KERNEL);
426 if (!drv_datap->base_img) {
430 strncpy(drv_datap->base_img, base_img, strlen(base_img) + 1);
433 dev_set_drvdata(bridge, drv_datap);
435 if (shm_size < 0x10000) { /* 64 KB */
437 pr_err("%s: shm size must be at least 64 KB\n", __func__);
440 dev_dbg(bridge, "%s: requested shm_size = 0x%x\n", __func__, shm_size);
442 phys_membase = pdata->phys_mempool_base;
443 phys_memsize = pdata->phys_mempool_size;
444 if (phys_membase > 0 && phys_memsize > 0)
445 mem_ext_phys_pool_init(phys_membase, phys_memsize);
448 dev_dbg(bridge, "%s: TC Word Swap is enabled\n", __func__);
450 driver_context = dsp_init(&err);
452 pr_err("DSP Bridge driver initialization failed\n");
459 mem_ext_phys_pool_release();
461 kfree(drv_datap->base_img);
465 #ifdef CONFIG_TIDSPBRIDGE_DVFS
466 cpufreq_unregister_notifier(&iva_clk_notifier,
467 CPUFREQ_TRANSITION_NOTIFIER);
474 static int __devinit omap34_xx_bridge_probe(struct platform_device *pdev)
478 #ifdef CONFIG_TIDSPBRIDGE_DVFS
482 omap_dspbridge_dev = pdev;
484 /* Global bridge device */
485 bridge = &omap_dspbridge_dev->dev;
487 /* Bridge low level initializations */
488 err = omap3_bridge_startup(pdev);
492 /* use 2.6 device model */
493 err = alloc_chrdev_region(&dev, 0, 1, "DspBridge");
495 pr_err("%s: Can't get major %d\n", __func__, driver_major);
499 cdev_init(&bridge_cdev, &bridge_fops);
500 bridge_cdev.owner = THIS_MODULE;
502 err = cdev_add(&bridge_cdev, dev, 1);
504 pr_err("%s: Failed to add bridge device\n", __func__);
509 bridge_class = class_create(THIS_MODULE, "ti_bridge");
510 if (IS_ERR(bridge_class)) {
511 pr_err("%s: Error creating bridge class\n", __func__);
515 driver_major = MAJOR(dev);
516 device_create(bridge_class, NULL, MKDEV(driver_major, 0),
518 pr_info("DSP Bridge driver loaded\n");
523 cdev_del(&bridge_cdev);
525 unregister_chrdev_region(dev, 1);
530 static int __devexit omap34_xx_bridge_remove(struct platform_device *pdev)
534 struct drv_data *drv_datap = dev_get_drvdata(bridge);
536 /* Retrieve the Object handle from the driver data */
537 if (!drv_datap || !drv_datap->drv_object) {
539 pr_err("%s: Failed to retrieve the object handle\n", __func__);
543 #ifdef CONFIG_TIDSPBRIDGE_DVFS
544 if (cpufreq_unregister_notifier(&iva_clk_notifier,
545 CPUFREQ_TRANSITION_NOTIFIER))
546 pr_err("%s: cpufreq_unregister_notifier failed for iva2_ck\n",
548 #endif /* #ifdef CONFIG_TIDSPBRIDGE_DVFS */
550 if (driver_context) {
551 /* Put the DSP in reset state */
552 dsp_deinit(driver_context);
557 dev_set_drvdata(bridge, NULL);
560 mem_ext_phys_pool_release();
564 devno = MKDEV(driver_major, 0);
565 cdev_del(&bridge_cdev);
566 unregister_chrdev_region(devno, 1);
568 /* remove the device from sysfs */
569 device_destroy(bridge_class, MKDEV(driver_major, 0));
570 class_destroy(bridge_class);
577 static int bridge_suspend(struct platform_device *pdev, pm_message_t state)
580 u32 command = PWR_EMERGENCYDEEPSLEEP;
582 status = pwr_sleep_dsp(command, time_out);
586 bridge_suspend_data.suspended = 1;
590 static int bridge_resume(struct platform_device *pdev)
594 status = pwr_wake_dsp(time_out);
598 bridge_suspend_data.suspended = 0;
599 wake_up(&bridge_suspend_data.suspend_wq);
604 static struct platform_driver bridge_driver = {
608 .probe = omap34_xx_bridge_probe,
609 .remove = __devexit_p(omap34_xx_bridge_remove),
611 .suspend = bridge_suspend,
612 .resume = bridge_resume,
616 /* To remove all process resources before removing the process from the
617 * process context list */
618 int drv_remove_all_resources(void *process_ctxt)
621 struct process_context *ctxt = (struct process_context *)process_ctxt;
622 drv_remove_all_strm_res_elements(ctxt);
623 drv_remove_all_node_res_elements(ctxt);
624 drv_remove_all_dmm_res_elements(ctxt);
625 ctxt->res_state = PROC_RES_FREED;
629 module_platform_driver(bridge_driver);