1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
2 //
3 // Copyright 2020 NXP
4 //
5 // Common helpers for the audio DSP on i.MX8
6
7 #include <linux/module.h>
8 #include <sound/sof/xtensa.h>
9 #include "../ops.h"
10
11 #include "imx-common.h"
12
13 /**
14 * imx8_get_registers() - This function is called in case of DSP oops
15 * in order to gather information about the registers, filename and
16 * linenumber and stack.
17 * @sdev: SOF device
18 * @xoops: Stores information about registers.
19 * @panic_info: Stores information about filename and line number.
20 * @stack: Stores the stack dump.
21 * @stack_words: Size of the stack dump.
22 */
imx8_get_registers(struct snd_sof_dev * sdev,struct sof_ipc_dsp_oops_xtensa * xoops,struct sof_ipc_panic_info * panic_info,u32 * stack,size_t stack_words)23 void imx8_get_registers(struct snd_sof_dev *sdev,
24 struct sof_ipc_dsp_oops_xtensa *xoops,
25 struct sof_ipc_panic_info *panic_info,
26 u32 *stack, size_t stack_words)
27 {
28 u32 offset = sdev->dsp_oops_offset;
29
30 /* first read registers */
31 sof_mailbox_read(sdev, offset, xoops, sizeof(*xoops));
32
33 /* then get panic info */
34 if (xoops->arch_hdr.totalsize > EXCEPT_MAX_HDR_SIZE) {
35 dev_err(sdev->dev, "invalid header size 0x%x. FW oops is bogus\n",
36 xoops->arch_hdr.totalsize);
37 return;
38 }
39 offset += xoops->arch_hdr.totalsize;
40 sof_mailbox_read(sdev, offset, panic_info, sizeof(*panic_info));
41
42 /* then get the stack */
43 offset += sizeof(*panic_info);
44 sof_mailbox_read(sdev, offset, stack, stack_words * sizeof(u32));
45 }
46
47 /**
48 * imx8_dump() - This function is called when a panic message is
49 * received from the firmware.
50 * @sdev: SOF device
51 * @flags: parameter not used but required by ops prototype
52 */
imx8_dump(struct snd_sof_dev * sdev,u32 flags)53 void imx8_dump(struct snd_sof_dev *sdev, u32 flags)
54 {
55 struct sof_ipc_dsp_oops_xtensa xoops;
56 struct sof_ipc_panic_info panic_info;
57 u32 stack[IMX8_STACK_DUMP_SIZE];
58 u32 status;
59
60 /* Get information about the panic status from the debug box area.
61 * Compute the trace point based on the status.
62 */
63 sof_mailbox_read(sdev, sdev->debug_box.offset + 0x4, &status, 4);
64
65 /* Get information about the registers, the filename and line
66 * number and the stack.
67 */
68 imx8_get_registers(sdev, &xoops, &panic_info, stack,
69 IMX8_STACK_DUMP_SIZE);
70
71 /* Print the information to the console */
72 sof_print_oops_and_stack(sdev, KERN_ERR, status, status, &xoops,
73 &panic_info, stack, IMX8_STACK_DUMP_SIZE);
74 }
75 EXPORT_SYMBOL(imx8_dump);
76
imx8_parse_clocks(struct snd_sof_dev * sdev,struct imx_clocks * clks)77 int imx8_parse_clocks(struct snd_sof_dev *sdev, struct imx_clocks *clks)
78 {
79 int ret;
80
81 ret = devm_clk_bulk_get(sdev->dev, clks->num_dsp_clks, clks->dsp_clks);
82 if (ret)
83 dev_err(sdev->dev, "Failed to request DSP clocks\n");
84
85 return ret;
86 }
87 EXPORT_SYMBOL(imx8_parse_clocks);
88
imx8_enable_clocks(struct snd_sof_dev * sdev,struct imx_clocks * clks)89 int imx8_enable_clocks(struct snd_sof_dev *sdev, struct imx_clocks *clks)
90 {
91 return clk_bulk_prepare_enable(clks->num_dsp_clks, clks->dsp_clks);
92 }
93 EXPORT_SYMBOL(imx8_enable_clocks);
94
imx8_disable_clocks(struct snd_sof_dev * sdev,struct imx_clocks * clks)95 void imx8_disable_clocks(struct snd_sof_dev *sdev, struct imx_clocks *clks)
96 {
97 clk_bulk_disable_unprepare(clks->num_dsp_clks, clks->dsp_clks);
98 }
99 EXPORT_SYMBOL(imx8_disable_clocks);
100
101 MODULE_LICENSE("Dual BSD/GPL");
102