2 * Copyright (c) 2016 MediaTek Inc.
3 * Author: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 #include <linux/clk.h>
15 #include <linux/debugfs.h>
16 #include <linux/firmware.h>
17 #include <linux/interrupt.h>
18 #include <linux/iommu.h>
19 #include <linux/module.h>
20 #include <linux/of_address.h>
21 #include <linux/of_irq.h>
22 #include <linux/of_platform.h>
23 #include <linux/of_reserved_mem.h>
24 #include <linux/sched.h>
25 #include <linux/sizes.h>
26 #include <linux/dma-mapping.h>
31 * VPU (video processor unit) is a tiny processor controlling video hardware
32 * related to video codec, scaling and color format converting.
33 * VPU interfaces with other blocks by share memory and interrupt.
36 #define INIT_TIMEOUT_MS 2000U
37 #define IPI_TIMEOUT_MS 2000U
38 #define VPU_FW_VER_LEN 16
40 /* maximum program/data TCM (Tightly-Coupled Memory) size */
41 #define VPU_PTCM_SIZE (96 * SZ_1K)
42 #define VPU_DTCM_SIZE (32 * SZ_1K)
43 /* the offset to get data tcm address */
44 #define VPU_DTCM_OFFSET 0x18000UL
45 /* daynamic allocated maximum extended memory size */
46 #define VPU_EXT_P_SIZE SZ_1M
47 #define VPU_EXT_D_SIZE SZ_4M
48 /* maximum binary firmware size */
49 #define VPU_P_FW_SIZE (VPU_PTCM_SIZE + VPU_EXT_P_SIZE)
50 #define VPU_D_FW_SIZE (VPU_DTCM_SIZE + VPU_EXT_D_SIZE)
51 /* the size of share buffer between Host and VPU */
52 #define SHARE_BUF_SIZE 48
54 /* binary firmware name */
55 #define VPU_P_FW "/*(DEBLOBBED)*/"
56 #define VPU_D_FW "/*(DEBLOBBED)*/"
59 #define VPU_TCM_CFG 0x0008
60 #define VPU_PMEM_EXT0_ADDR 0x000C
61 #define VPU_PMEM_EXT1_ADDR 0x0010
62 #define VPU_TO_HOST 0x001C
63 #define VPU_DMEM_EXT0_ADDR 0x0014
64 #define VPU_DMEM_EXT1_ADDR 0x0018
65 #define HOST_TO_VPU 0x0024
66 #define VPU_PC_REG 0x0060
67 #define VPU_WDT_REG 0x0084
69 /* vpu inter-processor communication interrupt */
70 #define VPU_IPC_INT BIT(8)
73 * enum vpu_fw_type - VPU firmware type
75 * @P_FW: program firmware
76 * @D_FW: data firmware
85 * struct vpu_mem - VPU extended program/data memory information
87 * @va: the kernel virtual memory address of VPU extended memory
88 * @pa: the physical memory address of VPU extended memory
97 * struct vpu_regs - VPU TCM and configuration registers
99 * @tcm: the register for VPU Tightly-Coupled Memory
100 * @cfg: the register for VPU configuration
101 * @irq: the irq number for VPU interrupt
110 * struct vpu_wdt_handler - VPU watchdog reset handler
112 * @reset_func: reset handler
113 * @priv: private data
115 struct vpu_wdt_handler {
116 void (*reset_func)(void *);
121 * struct vpu_wdt - VPU watchdog workqueue
123 * @handler: VPU watchdog reset handler
124 * @ws: workstruct for VPU watchdog
125 * @wq: workqueue for VPU watchdog
128 struct vpu_wdt_handler handler[VPU_RST_MAX];
129 struct work_struct ws;
130 struct workqueue_struct *wq;
134 * struct vpu_run - VPU initialization status
136 * @signaled: the signal of vpu initialization completed
137 * @fw_ver: VPU firmware version
138 * @dec_capability: decoder capability which is not used for now and
139 * the value is reserved for future use
140 * @enc_capability: encoder capability which is not used for now and
141 * the value is reserved for future use
142 * @wq: wait queue for VPU initialization status
146 char fw_ver[VPU_FW_VER_LEN];
147 unsigned int dec_capability;
148 unsigned int enc_capability;
149 wait_queue_head_t wq;
153 * struct vpu_ipi_desc - VPU IPI descriptor
155 * @handler: IPI handler
156 * @name: the name of IPI handler
157 * @priv: the private data of IPI handler
159 struct vpu_ipi_desc {
160 ipi_handler_t handler;
166 * struct share_obj - DTCM (Data Tightly-Coupled Memory) buffer shared with
170 * @len: share buffer length
171 * @share_buf: share buffer data
176 unsigned char share_buf[SHARE_BUF_SIZE];
180 * struct mtk_vpu - vpu driver data
181 * @extmem: VPU extended memory information
182 * @reg: VPU TCM and configuration registers
183 * @run: VPU initialization status
184 * @wdt: VPU watchdog workqueue
185 * @ipi_desc: VPU IPI descriptor
186 * @recv_buf: VPU DTCM share buffer for receiving. The
187 * receive buffer is only accessed in interrupt context.
188 * @send_buf: VPU DTCM share buffer for sending
189 * @dev: VPU struct device
190 * @clk: VPU clock on/off
191 * @fw_loaded: indicate VPU firmware loaded
192 * @enable_4GB: VPU 4GB mode on/off
193 * @vpu_mutex: protect mtk_vpu (except recv_buf) and ensure only
194 * one client to use VPU service at a time. For example,
195 * suppose a client is using VPU to decode VP8.
196 * If the other client wants to encode VP8,
197 * it has to wait until VP8 decode completes.
198 * @wdt_refcnt: WDT reference count to make sure the watchdog can be
199 * disabled if no other client is using VPU service
200 * @ack_wq: The wait queue for each codec and mdp. When sleeping
201 * processes wake up, they will check the condition
202 * "ipi_id_ack" to run the corresponding action or
204 * @ipi_id_ack: The ACKs for registered IPI function sending
209 struct vpu_mem extmem[2];
213 struct vpu_ipi_desc ipi_desc[IPI_MAX];
214 struct share_obj *recv_buf;
215 struct share_obj *send_buf;
220 struct mutex vpu_mutex; /* for protecting vpu data data structure */
222 wait_queue_head_t ack_wq;
223 bool ipi_id_ack[IPI_MAX];
226 static inline void vpu_cfg_writel(struct mtk_vpu *vpu, u32 val, u32 offset)
228 writel(val, vpu->reg.cfg + offset);
231 static inline u32 vpu_cfg_readl(struct mtk_vpu *vpu, u32 offset)
233 return readl(vpu->reg.cfg + offset);
236 static inline bool vpu_running(struct mtk_vpu *vpu)
238 return vpu_cfg_readl(vpu, VPU_RESET) & BIT(0);
241 static void vpu_clock_disable(struct mtk_vpu *vpu)
243 /* Disable VPU watchdog */
244 mutex_lock(&vpu->vpu_mutex);
245 if (!--vpu->wdt_refcnt)
247 vpu_cfg_readl(vpu, VPU_WDT_REG) & ~(1L << 31),
249 mutex_unlock(&vpu->vpu_mutex);
251 clk_disable(vpu->clk);
254 static int vpu_clock_enable(struct mtk_vpu *vpu)
258 ret = clk_enable(vpu->clk);
261 /* Enable VPU watchdog */
262 mutex_lock(&vpu->vpu_mutex);
263 if (!vpu->wdt_refcnt++)
265 vpu_cfg_readl(vpu, VPU_WDT_REG) | (1L << 31),
267 mutex_unlock(&vpu->vpu_mutex);
272 int vpu_ipi_register(struct platform_device *pdev,
273 enum ipi_id id, ipi_handler_t handler,
274 const char *name, void *priv)
276 struct mtk_vpu *vpu = platform_get_drvdata(pdev);
277 struct vpu_ipi_desc *ipi_desc;
280 dev_err(&pdev->dev, "vpu device in not ready\n");
281 return -EPROBE_DEFER;
284 if (id >= 0 && id < IPI_MAX && handler) {
285 ipi_desc = vpu->ipi_desc;
286 ipi_desc[id].name = name;
287 ipi_desc[id].handler = handler;
288 ipi_desc[id].priv = priv;
292 dev_err(&pdev->dev, "register vpu ipi id %d with invalid arguments\n",
296 EXPORT_SYMBOL_GPL(vpu_ipi_register);
298 int vpu_ipi_send(struct platform_device *pdev,
299 enum ipi_id id, void *buf,
302 struct mtk_vpu *vpu = platform_get_drvdata(pdev);
303 struct share_obj *send_obj = vpu->send_buf;
304 unsigned long timeout;
307 if (id <= IPI_VPU_INIT || id >= IPI_MAX ||
308 len > sizeof(send_obj->share_buf) || !buf) {
309 dev_err(vpu->dev, "failed to send ipi message\n");
313 ret = vpu_clock_enable(vpu);
315 dev_err(vpu->dev, "failed to enable vpu clock\n");
318 if (!vpu_running(vpu)) {
319 dev_err(vpu->dev, "vpu_ipi_send: VPU is not running\n");
324 mutex_lock(&vpu->vpu_mutex);
326 /* Wait until VPU receives the last command */
327 timeout = jiffies + msecs_to_jiffies(IPI_TIMEOUT_MS);
329 if (time_after(jiffies, timeout)) {
330 dev_err(vpu->dev, "vpu_ipi_send: IPI timeout!\n");
334 } while (vpu_cfg_readl(vpu, HOST_TO_VPU));
336 memcpy((void *)send_obj->share_buf, buf, len);
340 vpu->ipi_id_ack[id] = false;
341 /* send the command to VPU */
342 vpu_cfg_writel(vpu, 0x1, HOST_TO_VPU);
344 mutex_unlock(&vpu->vpu_mutex);
346 /* wait for VPU's ACK */
347 timeout = msecs_to_jiffies(IPI_TIMEOUT_MS);
348 ret = wait_event_timeout(vpu->ack_wq, vpu->ipi_id_ack[id], timeout);
349 vpu->ipi_id_ack[id] = false;
351 dev_err(vpu->dev, "vpu ipi %d ack time out !", id);
355 vpu_clock_disable(vpu);
360 mutex_unlock(&vpu->vpu_mutex);
362 vpu_clock_disable(vpu);
366 EXPORT_SYMBOL_GPL(vpu_ipi_send);
368 static void vpu_wdt_reset_func(struct work_struct *ws)
370 struct vpu_wdt *wdt = container_of(ws, struct vpu_wdt, ws);
371 struct mtk_vpu *vpu = container_of(wdt, struct mtk_vpu, wdt);
372 struct vpu_wdt_handler *handler = wdt->handler;
375 dev_info(vpu->dev, "vpu reset\n");
376 ret = vpu_clock_enable(vpu);
378 dev_err(vpu->dev, "[VPU] wdt enables clock failed %d\n", ret);
381 mutex_lock(&vpu->vpu_mutex);
382 vpu_cfg_writel(vpu, 0x0, VPU_RESET);
383 vpu->fw_loaded = false;
384 mutex_unlock(&vpu->vpu_mutex);
385 vpu_clock_disable(vpu);
387 for (index = 0; index < VPU_RST_MAX; index++) {
388 if (handler[index].reset_func) {
389 handler[index].reset_func(handler[index].priv);
390 dev_dbg(vpu->dev, "wdt handler func %d\n", index);
395 int vpu_wdt_reg_handler(struct platform_device *pdev,
396 void wdt_reset(void *),
397 void *priv, enum rst_id id)
399 struct mtk_vpu *vpu = platform_get_drvdata(pdev);
400 struct vpu_wdt_handler *handler;
403 dev_err(&pdev->dev, "vpu device in not ready\n");
404 return -EPROBE_DEFER;
407 handler = vpu->wdt.handler;
409 if (id >= 0 && id < VPU_RST_MAX && wdt_reset) {
410 dev_dbg(vpu->dev, "wdt register id %d\n", id);
411 mutex_lock(&vpu->vpu_mutex);
412 handler[id].reset_func = wdt_reset;
413 handler[id].priv = priv;
414 mutex_unlock(&vpu->vpu_mutex);
418 dev_err(vpu->dev, "register vpu wdt handler failed\n");
421 EXPORT_SYMBOL_GPL(vpu_wdt_reg_handler);
423 unsigned int vpu_get_vdec_hw_capa(struct platform_device *pdev)
425 struct mtk_vpu *vpu = platform_get_drvdata(pdev);
427 return vpu->run.dec_capability;
429 EXPORT_SYMBOL_GPL(vpu_get_vdec_hw_capa);
431 unsigned int vpu_get_venc_hw_capa(struct platform_device *pdev)
433 struct mtk_vpu *vpu = platform_get_drvdata(pdev);
435 return vpu->run.enc_capability;
437 EXPORT_SYMBOL_GPL(vpu_get_venc_hw_capa);
439 void *vpu_mapping_dm_addr(struct platform_device *pdev,
442 struct mtk_vpu *vpu = platform_get_drvdata(pdev);
444 if (!dtcm_dmem_addr ||
445 (dtcm_dmem_addr > (VPU_DTCM_SIZE + VPU_EXT_D_SIZE))) {
446 dev_err(vpu->dev, "invalid virtual data memory address\n");
447 return ERR_PTR(-EINVAL);
450 if (dtcm_dmem_addr < VPU_DTCM_SIZE)
451 return (__force void *)(dtcm_dmem_addr + vpu->reg.tcm +
454 return vpu->extmem[D_FW].va + (dtcm_dmem_addr - VPU_DTCM_SIZE);
456 EXPORT_SYMBOL_GPL(vpu_mapping_dm_addr);
458 struct platform_device *vpu_get_plat_device(struct platform_device *pdev)
460 struct device *dev = &pdev->dev;
461 struct device_node *vpu_node;
462 struct platform_device *vpu_pdev;
464 vpu_node = of_parse_phandle(dev->of_node, "mediatek,vpu", 0);
466 dev_err(dev, "can't get vpu node\n");
470 vpu_pdev = of_find_device_by_node(vpu_node);
471 if (WARN_ON(!vpu_pdev)) {
472 dev_err(dev, "vpu pdev failed\n");
473 of_node_put(vpu_node);
479 EXPORT_SYMBOL_GPL(vpu_get_plat_device);
481 /* load vpu program/data memory */
482 static int load_requested_vpu(struct mtk_vpu *vpu,
483 const struct firmware *vpu_fw,
486 size_t tcm_size = fw_type ? VPU_DTCM_SIZE : VPU_PTCM_SIZE;
487 size_t fw_size = fw_type ? VPU_D_FW_SIZE : VPU_P_FW_SIZE;
488 char *fw_name = fw_type ? VPU_D_FW : VPU_P_FW;
490 size_t extra_fw_size = 0;
494 ret = reject_firmware(&vpu_fw, fw_name, vpu->dev);
496 dev_err(vpu->dev, "Failed to load %s, %d\n", fw_name, ret);
499 dl_size = vpu_fw->size;
500 if (dl_size > fw_size) {
501 dev_err(vpu->dev, "fw %s size %zu is abnormal\n", fw_name,
503 release_firmware(vpu_fw);
506 dev_dbg(vpu->dev, "Downloaded fw %s size: %zu.\n",
510 vpu_cfg_writel(vpu, 0x0, VPU_RESET);
512 /* handle extended firmware size */
513 if (dl_size > tcm_size) {
514 dev_dbg(vpu->dev, "fw size %zu > limited fw size %zu\n",
516 extra_fw_size = dl_size - tcm_size;
517 dev_dbg(vpu->dev, "extra_fw_size %zu\n", extra_fw_size);
520 dest = (__force void *)vpu->reg.tcm;
522 dest += VPU_DTCM_OFFSET;
523 memcpy(dest, vpu_fw->data, dl_size);
524 /* download to extended memory if need */
525 if (extra_fw_size > 0) {
526 dest = vpu->extmem[fw_type].va;
527 dev_dbg(vpu->dev, "download extended memory type %x\n",
529 memcpy(dest, vpu_fw->data + tcm_size, extra_fw_size);
532 release_firmware(vpu_fw);
537 int vpu_load_firmware(struct platform_device *pdev)
540 struct device *dev = &pdev->dev;
542 const struct firmware *vpu_fw = NULL;
546 dev_err(dev, "VPU platform device is invalid\n");
550 vpu = platform_get_drvdata(pdev);
553 mutex_lock(&vpu->vpu_mutex);
554 if (vpu->fw_loaded) {
555 mutex_unlock(&vpu->vpu_mutex);
558 mutex_unlock(&vpu->vpu_mutex);
560 ret = vpu_clock_enable(vpu);
562 dev_err(dev, "enable clock failed %d\n", ret);
566 mutex_lock(&vpu->vpu_mutex);
568 run->signaled = false;
569 dev_dbg(vpu->dev, "firmware request\n");
570 /* Downloading program firmware to device*/
571 ret = load_requested_vpu(vpu, vpu_fw, P_FW);
573 dev_err(dev, "Failed to request %s, %d\n", VPU_P_FW, ret);
577 /* Downloading data firmware to device */
578 ret = load_requested_vpu(vpu, vpu_fw, D_FW);
580 dev_err(dev, "Failed to request %s, %d\n", VPU_D_FW, ret);
584 vpu->fw_loaded = true;
586 vpu_cfg_writel(vpu, 0x1, VPU_RESET);
588 ret = wait_event_interruptible_timeout(run->wq,
590 msecs_to_jiffies(INIT_TIMEOUT_MS)
594 dev_err(dev, "wait vpu initialization timeout!\n");
596 } else if (-ERESTARTSYS == ret) {
597 dev_err(dev, "wait vpu interrupted by a signal!\n");
602 dev_info(dev, "vpu is ready. Fw version %s\n", run->fw_ver);
605 mutex_unlock(&vpu->vpu_mutex);
606 vpu_clock_disable(vpu);
610 EXPORT_SYMBOL_GPL(vpu_load_firmware);
612 static void vpu_init_ipi_handler(void *data, unsigned int len, void *priv)
614 struct mtk_vpu *vpu = (struct mtk_vpu *)priv;
615 struct vpu_run *run = (struct vpu_run *)data;
617 vpu->run.signaled = run->signaled;
618 strncpy(vpu->run.fw_ver, run->fw_ver, VPU_FW_VER_LEN);
619 vpu->run.dec_capability = run->dec_capability;
620 vpu->run.enc_capability = run->enc_capability;
621 wake_up_interruptible(&vpu->run.wq);
624 #ifdef CONFIG_DEBUG_FS
625 static ssize_t vpu_debug_read(struct file *file, char __user *user_buf,
626 size_t count, loff_t *ppos)
630 unsigned int running, pc, vpu_to_host, host_to_vpu, wdt;
632 struct device *dev = file->private_data;
633 struct mtk_vpu *vpu = dev_get_drvdata(dev);
635 ret = vpu_clock_enable(vpu);
637 dev_err(vpu->dev, "[VPU] enable clock failed %d\n", ret);
641 /* vpu register status */
642 running = vpu_running(vpu);
643 pc = vpu_cfg_readl(vpu, VPU_PC_REG);
644 wdt = vpu_cfg_readl(vpu, VPU_WDT_REG);
645 host_to_vpu = vpu_cfg_readl(vpu, HOST_TO_VPU);
646 vpu_to_host = vpu_cfg_readl(vpu, VPU_TO_HOST);
647 vpu_clock_disable(vpu);
650 len = snprintf(buf, sizeof(buf), "VPU is running\n\n"
654 "Host to VPU: 0x%x\n"
655 "VPU to Host: 0x%x\n",
656 vpu->run.fw_ver, pc, wdt,
657 host_to_vpu, vpu_to_host);
659 len = snprintf(buf, sizeof(buf), "VPU not running\n");
662 return simple_read_from_buffer(user_buf, count, ppos, buf, len);
665 static const struct file_operations vpu_debug_fops = {
667 .read = vpu_debug_read,
669 #endif /* CONFIG_DEBUG_FS */
671 static void vpu_free_ext_mem(struct mtk_vpu *vpu, u8 fw_type)
673 struct device *dev = vpu->dev;
674 size_t fw_ext_size = fw_type ? VPU_EXT_D_SIZE : VPU_EXT_P_SIZE;
676 dma_free_coherent(dev, fw_ext_size, vpu->extmem[fw_type].va,
677 vpu->extmem[fw_type].pa);
680 static int vpu_alloc_ext_mem(struct mtk_vpu *vpu, u32 fw_type)
682 struct device *dev = vpu->dev;
683 size_t fw_ext_size = fw_type ? VPU_EXT_D_SIZE : VPU_EXT_P_SIZE;
684 u32 vpu_ext_mem0 = fw_type ? VPU_DMEM_EXT0_ADDR : VPU_PMEM_EXT0_ADDR;
685 u32 vpu_ext_mem1 = fw_type ? VPU_DMEM_EXT1_ADDR : VPU_PMEM_EXT1_ADDR;
686 u32 offset_4gb = vpu->enable_4GB ? 0x40000000 : 0;
688 vpu->extmem[fw_type].va = dma_alloc_coherent(dev,
690 &vpu->extmem[fw_type].pa,
692 if (!vpu->extmem[fw_type].va) {
693 dev_err(dev, "Failed to allocate the extended program memory\n");
697 /* Disable extend0. Enable extend1 */
698 vpu_cfg_writel(vpu, 0x1, vpu_ext_mem0);
699 vpu_cfg_writel(vpu, (vpu->extmem[fw_type].pa & 0xFFFFF000) + offset_4gb,
702 dev_info(dev, "%s extend memory phy=0x%llx virt=0x%p\n",
703 fw_type ? "Data" : "Program",
704 (unsigned long long)vpu->extmem[fw_type].pa,
705 vpu->extmem[fw_type].va);
710 static void vpu_ipi_handler(struct mtk_vpu *vpu)
712 struct share_obj *rcv_obj = vpu->recv_buf;
713 struct vpu_ipi_desc *ipi_desc = vpu->ipi_desc;
715 if (rcv_obj->id < IPI_MAX && ipi_desc[rcv_obj->id].handler) {
716 ipi_desc[rcv_obj->id].handler(rcv_obj->share_buf,
718 ipi_desc[rcv_obj->id].priv);
719 if (rcv_obj->id > IPI_VPU_INIT) {
720 vpu->ipi_id_ack[rcv_obj->id] = true;
721 wake_up(&vpu->ack_wq);
724 dev_err(vpu->dev, "No such ipi id = %d\n", rcv_obj->id);
728 static int vpu_ipi_init(struct mtk_vpu *vpu)
730 /* Disable VPU to host interrupt */
731 vpu_cfg_writel(vpu, 0x0, VPU_TO_HOST);
733 /* shared buffer initialization */
734 vpu->recv_buf = (__force struct share_obj *)(vpu->reg.tcm +
736 vpu->send_buf = vpu->recv_buf + 1;
737 memset(vpu->recv_buf, 0, sizeof(struct share_obj));
738 memset(vpu->send_buf, 0, sizeof(struct share_obj));
743 static irqreturn_t vpu_irq_handler(int irq, void *priv)
745 struct mtk_vpu *vpu = priv;
750 * Clock should have been enabled already.
751 * Enable again in case vpu_ipi_send times out
752 * and has disabled the clock.
754 ret = clk_enable(vpu->clk);
756 dev_err(vpu->dev, "[VPU] enable clock failed %d\n", ret);
759 vpu_to_host = vpu_cfg_readl(vpu, VPU_TO_HOST);
760 if (vpu_to_host & VPU_IPC_INT) {
761 vpu_ipi_handler(vpu);
763 dev_err(vpu->dev, "vpu watchdog timeout! 0x%x", vpu_to_host);
764 queue_work(vpu->wdt.wq, &vpu->wdt.ws);
767 /* VPU won't send another interrupt until we set VPU_TO_HOST to 0. */
768 vpu_cfg_writel(vpu, 0x0, VPU_TO_HOST);
769 clk_disable(vpu->clk);
774 #ifdef CONFIG_DEBUG_FS
775 static struct dentry *vpu_debugfs;
777 static int mtk_vpu_probe(struct platform_device *pdev)
781 struct resource *res;
784 dev_dbg(&pdev->dev, "initialization\n");
787 vpu = devm_kzalloc(dev, sizeof(*vpu), GFP_KERNEL);
791 vpu->dev = &pdev->dev;
792 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "tcm");
793 vpu->reg.tcm = devm_ioremap_resource(dev, res);
794 if (IS_ERR((__force void *)vpu->reg.tcm))
795 return PTR_ERR((__force void *)vpu->reg.tcm);
797 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg_reg");
798 vpu->reg.cfg = devm_ioremap_resource(dev, res);
799 if (IS_ERR((__force void *)vpu->reg.cfg))
800 return PTR_ERR((__force void *)vpu->reg.cfg);
803 vpu->clk = devm_clk_get(dev, "main");
804 if (IS_ERR(vpu->clk)) {
805 dev_err(dev, "get vpu clock failed\n");
806 return PTR_ERR(vpu->clk);
809 platform_set_drvdata(pdev, vpu);
811 ret = clk_prepare(vpu->clk);
813 dev_err(dev, "prepare vpu clock failed\n");
818 vpu->wdt.wq = create_singlethread_workqueue("vpu_wdt");
820 dev_err(dev, "initialize wdt workqueue failed\n");
824 INIT_WORK(&vpu->wdt.ws, vpu_wdt_reset_func);
825 mutex_init(&vpu->vpu_mutex);
827 ret = vpu_clock_enable(vpu);
829 dev_err(dev, "enable vpu clock failed\n");
830 goto workqueue_destroy;
833 dev_dbg(dev, "vpu ipi init\n");
834 ret = vpu_ipi_init(vpu);
836 dev_err(dev, "Failed to init ipi\n");
837 goto disable_vpu_clk;
840 /* register vpu initialization IPI */
841 ret = vpu_ipi_register(pdev, IPI_VPU_INIT, vpu_init_ipi_handler,
844 dev_err(dev, "Failed to register IPI_VPU_INIT\n");
845 goto vpu_mutex_destroy;
848 #ifdef CONFIG_DEBUG_FS
849 vpu_debugfs = debugfs_create_file("mtk_vpu", S_IRUGO, NULL, (void *)dev,
857 /* Set PTCM to 96K and DTCM to 32K */
858 vpu_cfg_writel(vpu, 0x2, VPU_TCM_CFG);
860 vpu->enable_4GB = !!(totalram_pages > (SZ_2G >> PAGE_SHIFT));
861 dev_info(dev, "4GB mode %u\n", vpu->enable_4GB);
863 if (vpu->enable_4GB) {
864 ret = of_reserved_mem_device_init(dev);
866 dev_info(dev, "init reserved memory failed\n");
867 /* continue to use dynamic allocation if failed */
870 ret = vpu_alloc_ext_mem(vpu, D_FW);
872 dev_err(dev, "Allocate DM failed\n");
876 ret = vpu_alloc_ext_mem(vpu, P_FW);
878 dev_err(dev, "Allocate PM failed\n");
882 init_waitqueue_head(&vpu->run.wq);
883 init_waitqueue_head(&vpu->ack_wq);
885 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
887 dev_err(dev, "get IRQ resource failed.\n");
891 vpu->reg.irq = platform_get_irq(pdev, 0);
892 ret = devm_request_irq(dev, vpu->reg.irq, vpu_irq_handler, 0,
895 dev_err(dev, "failed to request irq\n");
899 vpu_clock_disable(vpu);
900 dev_dbg(dev, "initialization completed\n");
905 vpu_free_ext_mem(vpu, P_FW);
907 vpu_free_ext_mem(vpu, D_FW);
909 of_reserved_mem_device_release(dev);
910 #ifdef CONFIG_DEBUG_FS
911 debugfs_remove(vpu_debugfs);
914 memset(vpu->ipi_desc, 0, sizeof(struct vpu_ipi_desc) * IPI_MAX);
916 mutex_destroy(&vpu->vpu_mutex);
918 vpu_clock_disable(vpu);
920 destroy_workqueue(vpu->wdt.wq);
922 clk_unprepare(vpu->clk);
927 static const struct of_device_id mtk_vpu_match[] = {
929 .compatible = "mediatek,mt8173-vpu",
933 MODULE_DEVICE_TABLE(of, mtk_vpu_match);
935 static int mtk_vpu_remove(struct platform_device *pdev)
937 struct mtk_vpu *vpu = platform_get_drvdata(pdev);
939 #ifdef CONFIG_DEBUG_FS
940 debugfs_remove(vpu_debugfs);
943 flush_workqueue(vpu->wdt.wq);
944 destroy_workqueue(vpu->wdt.wq);
946 vpu_free_ext_mem(vpu, P_FW);
947 vpu_free_ext_mem(vpu, D_FW);
948 mutex_destroy(&vpu->vpu_mutex);
949 clk_unprepare(vpu->clk);
954 static struct platform_driver mtk_vpu_driver = {
955 .probe = mtk_vpu_probe,
956 .remove = mtk_vpu_remove,
959 .of_match_table = mtk_vpu_match,
963 module_platform_driver(mtk_vpu_driver);
965 MODULE_LICENSE("GPL v2");
966 MODULE_DESCRIPTION("Mediatek Video Processor Unit driver");