Hi James,
On Thu, Jun 20, 2024 at 04:17:41PM +0000, James Ogletree wrote:
> A write sequence is a sequence of register addresses
> and values executed by some Cirrus DSPs following
> certain power state transitions.
>
> Add support for Cirrus drivers to update or add to a
> write sequence present in firmware.
>
> Reviewed-by: Charles Keepax <ckeepax@xxxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: James Ogletree <jogletre@xxxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Jeff LaBundy <jeff@xxxxxxxxxxx>
Thanks again for your great work here. This entire driver is well
organized, scalable, and serves as a great template for future FF
devices with similar use-cases. Nice job!
Kind regards,
Jeff LaBundy
> ---
> Note that this patch can be applied before the others.
>
> drivers/firmware/cirrus/cs_dsp.c | 278 +++++++++++++++++++++++++
> include/linux/firmware/cirrus/cs_dsp.h | 27 +++
> 2 files changed, 305 insertions(+)
>
> diff --git a/drivers/firmware/cirrus/cs_dsp.c b/drivers/firmware/cirrus/cs_dsp.c
> index 79d4254d1f9b..6d886ffea10f 100644
> --- a/drivers/firmware/cirrus/cs_dsp.c
> +++ b/drivers/firmware/cirrus/cs_dsp.c
> @@ -275,6 +275,12 @@
> #define HALO_MPU_VIO_ERR_SRC_MASK 0x00007fff
> #define HALO_MPU_VIO_ERR_SRC_SHIFT 0
>
> +/*
> + * Write Sequence
> + */
> +#define WSEQ_OP_MAX_WORDS 3
> +#define WSEQ_END_OF_SCRIPT 0xFFFFFF
> +
> struct cs_dsp_ops {
> bool (*validate_version)(struct cs_dsp *dsp, unsigned int version);
> unsigned int (*parse_sizes)(struct cs_dsp *dsp,
> @@ -3339,6 +3345,278 @@ int cs_dsp_chunk_read(struct cs_dsp_chunk *ch, int nbits)
> }
> EXPORT_SYMBOL_NS_GPL(cs_dsp_chunk_read, FW_CS_DSP);
>
> +
> +struct cs_dsp_wseq_op {
> + struct list_head list;
> + u32 address;
> + u32 data;
> + u16 offset;
> + u8 operation;
> +};
> +
> +static void cs_dsp_wseq_clear(struct cs_dsp *dsp, struct cs_dsp_wseq *wseq)
> +{
> + struct cs_dsp_wseq_op *op, *op_tmp;
> +
> + list_for_each_entry_safe(op, op_tmp, &wseq->ops, list) {
> + list_del(&op->list);
> + devm_kfree(dsp->dev, op);
> + }
> +}
> +
> +static int cs_dsp_populate_wseq(struct cs_dsp *dsp, struct cs_dsp_wseq *wseq)
> +{
> + struct cs_dsp_wseq_op *op = NULL;
> + struct cs_dsp_chunk chunk;
> + u8 *words;
> + int ret;
> +
> + if (!wseq->ctl) {
> + cs_dsp_err(dsp, "No control for write sequence\n");
> + return -EINVAL;
> + }
> +
> + words = kzalloc(wseq->ctl->len, GFP_KERNEL);
> + if (!words)
> + return -ENOMEM;
> +
> + ret = cs_dsp_coeff_read_ctrl(wseq->ctl, 0, words, wseq->ctl->len);
> + if (ret) {
> + cs_dsp_err(dsp, "Failed to read %s: %d\n", wseq->ctl->subname, ret);
> + goto err_free;
> + }
> +
> + INIT_LIST_HEAD(&wseq->ops);
> +
> + chunk = cs_dsp_chunk(words, wseq->ctl->len);
> +
> + while (!cs_dsp_chunk_end(&chunk)) {
> + op = devm_kzalloc(dsp->dev, sizeof(*op), GFP_KERNEL);
> + if (!op) {
> + ret = -ENOMEM;
> + goto err_free;
> + }
> +
> + op->offset = cs_dsp_chunk_bytes(&chunk);
> + op->operation = cs_dsp_chunk_read(&chunk, 8);
> +
> + switch (op->operation) {
> + case CS_DSP_WSEQ_END:
> + op->data = WSEQ_END_OF_SCRIPT;
> + break;
> + case CS_DSP_WSEQ_UNLOCK:
> + op->data = cs_dsp_chunk_read(&chunk, 16);
> + break;
> + case CS_DSP_WSEQ_ADDR8:
> + op->address = cs_dsp_chunk_read(&chunk, 8);
> + op->data = cs_dsp_chunk_read(&chunk, 32);
> + break;
> + case CS_DSP_WSEQ_H16:
> + case CS_DSP_WSEQ_L16:
> + op->address = cs_dsp_chunk_read(&chunk, 24);
> + op->data = cs_dsp_chunk_read(&chunk, 16);
> + break;
> + case CS_DSP_WSEQ_FULL:
> + op->address = cs_dsp_chunk_read(&chunk, 32);
> + op->data = cs_dsp_chunk_read(&chunk, 32);
> + break;
> + default:
> + ret = -EINVAL;
> + cs_dsp_err(dsp, "Unsupported op: %X\n", op->operation);
> + devm_kfree(dsp->dev, op);
> + goto err_free;
> + }
> +
> + list_add_tail(&op->list, &wseq->ops);
> +
> + if (op->operation == CS_DSP_WSEQ_END)
> + break;
> + }
> +
> + if (op && op->operation != CS_DSP_WSEQ_END) {
> + cs_dsp_err(dsp, "%s missing end terminator\n", wseq->ctl->subname);
> + ret = -ENOENT;
> + }
> +
> +err_free:
> + kfree(words);
> +
> + return ret;
> +}
> +
> +/**
> + * cs_dsp_wseq_init() - Initialize write sequences contained within the loaded DSP firmware
> + * @dsp: Pointer to DSP structure
> + * @wseqs: List of write sequences to initialize
> + * @num_wseqs: Number of write sequences to initialize
> + *
> + * Return: Zero for success, a negative number on error.
> + */
> +int cs_dsp_wseq_init(struct cs_dsp *dsp, struct cs_dsp_wseq *wseqs, unsigned int num_wseqs)
> +{
> + int i, ret;
> +
> + lockdep_assert_held(&dsp->pwr_lock);
> +
> + for (i = 0; i < num_wseqs; i++) {
> + ret = cs_dsp_populate_wseq(dsp, &wseqs[i]);
> + if (ret) {
> + cs_dsp_wseq_clear(dsp, &wseqs[i]);
> + return ret;
> + }
> + }
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_NS_GPL(cs_dsp_wseq_init, FW_CS_DSP);
> +
> +static struct cs_dsp_wseq_op *cs_dsp_wseq_find_op(u32 addr, u8 op_code,
> + struct list_head *wseq_ops)
> +{
> + struct cs_dsp_wseq_op *op;
> +
> + list_for_each_entry(op, wseq_ops, list) {
> + if (op->operation == op_code && op->address == addr)
> + return op;
> + }
> +
> + return NULL;
> +}
> +
> +/**
> + * cs_dsp_wseq_write() - Add or update an entry in a write sequence
> + * @dsp: Pointer to a DSP structure
> + * @wseq: Write sequence to write to
> + * @addr: Address of the register to be written to
> + * @data: Data to be written
> + * @op_code: The type of operation of the new entry
> + * @update: If true, searches for the first entry in the write sequence with
> + * the same address and op_code, and replaces it. If false, creates a new entry
> + * at the tail
> + *
> + * This function formats register address and value pairs into the format
> + * required for write sequence entries, and either updates or adds the
> + * new entry into the write sequence.
> + *
> + * If update is set to true and no matching entry is found, it will add a new entry.
> + *
> + * Return: Zero for success, a negative number on error.
> + */
> +int cs_dsp_wseq_write(struct cs_dsp *dsp, struct cs_dsp_wseq *wseq,
> + u32 addr, u32 data, u8 op_code, bool update)
> +{
> + struct cs_dsp_wseq_op *op_end, *op_new = NULL;
> + u32 words[WSEQ_OP_MAX_WORDS];
> + struct cs_dsp_chunk chunk;
> + int new_op_size, ret;
> +
> + if (update)
> + op_new = cs_dsp_wseq_find_op(addr, op_code, &wseq->ops);
> +
> + /* If entry to update is not found, treat it as a new operation */
> + if (!op_new) {
> + op_end = cs_dsp_wseq_find_op(0, CS_DSP_WSEQ_END, &wseq->ops);
> + if (!op_end) {
> + cs_dsp_err(dsp, "Missing terminator for %s\n", wseq->ctl->subname);
> + return -EINVAL;
> + }
> +
> + op_new = devm_kzalloc(dsp->dev, sizeof(*op_new), GFP_KERNEL);
> + if (!op_new)
> + return -ENOMEM;
> +
> + op_new->operation = op_code;
> + op_new->address = addr;
> + op_new->offset = op_end->offset;
> + update = false;
> + }
> +
> + op_new->data = data;
> +
> + chunk = cs_dsp_chunk(words, sizeof(words));
> + cs_dsp_chunk_write(&chunk, 8, op_new->operation);
> +
> + switch (op_code) {
> + case CS_DSP_WSEQ_FULL:
> + cs_dsp_chunk_write(&chunk, 32, op_new->address);
> + cs_dsp_chunk_write(&chunk, 32, op_new->data);
> + break;
> + case CS_DSP_WSEQ_L16:
> + case CS_DSP_WSEQ_H16:
> + cs_dsp_chunk_write(&chunk, 24, op_new->address);
> + cs_dsp_chunk_write(&chunk, 16, op_new->data);
> + break;
> + default:
> + ret = -EINVAL;
> + cs_dsp_err(dsp, "Operation %X not supported\n", op_code);
> + goto op_new_free;
> + }
> +
> + new_op_size = cs_dsp_chunk_bytes(&chunk);
> +
> + if (!update) {
> + if (wseq->ctl->len - op_end->offset < new_op_size) {
> + cs_dsp_err(dsp, "Not enough memory in %s for entry\n", wseq->ctl->subname);
> + ret = -E2BIG;
> + goto op_new_free;
> + }
> +
> + op_end->offset += new_op_size;
> +
> + ret = cs_dsp_coeff_write_ctrl(wseq->ctl, op_end->offset / sizeof(u32),
> + &op_end->data, sizeof(u32));
> + if (ret)
> + goto op_new_free;
> +
> + list_add_tail(&op_new->list, &op_end->list);
> + }
> +
> + ret = cs_dsp_coeff_write_ctrl(wseq->ctl, op_new->offset / sizeof(u32),
> + words, new_op_size);
> + if (ret)
> + goto op_new_free;
> +
> + return 0;
> +
> +op_new_free:
> + devm_kfree(dsp->dev, op_new);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_NS_GPL(cs_dsp_wseq_write, FW_CS_DSP);
> +
> +/**
> + * cs_dsp_wseq_multi_write() - Add or update multiple entries in a write sequence
> + * @dsp: Pointer to a DSP structure
> + * @wseq: Write sequence to write to
> + * @reg_seq: List of address-data pairs
> + * @num_regs: Number of address-data pairs
> + * @op_code: The types of operations of the new entries
> + * @update: If true, searches for the first entry in the write sequence with
> + * the same address and op_code, and replaces it. If false, creates a new entry
> + * at the tail
> + *
> + * This function calls cs_dsp_wseq_write() for multiple address-data pairs.
> + *
> + * Return: Zero for success, a negative number on error.
> + */
> +int cs_dsp_wseq_multi_write(struct cs_dsp *dsp, struct cs_dsp_wseq *wseq,
> + const struct reg_sequence *reg_seq, int num_regs,
> + u8 op_code, bool update)
> +{
> + int i, ret;
> +
> + for (i = 0; i < num_regs; i++) {
> + ret = cs_dsp_wseq_write(dsp, wseq, reg_seq[i].reg,
> + reg_seq[i].def, op_code, update);
> + if (ret)
> + return ret;
> + }
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_NS_GPL(cs_dsp_wseq_multi_write, FW_CS_DSP);
> +
> MODULE_DESCRIPTION("Cirrus Logic DSP Support");
> MODULE_AUTHOR("Simon Trimmer <simont@xxxxxxxxxxxxxxxxxxxxx>");
> MODULE_LICENSE("GPL v2");
> diff --git a/include/linux/firmware/cirrus/cs_dsp.h b/include/linux/firmware/cirrus/cs_dsp.h
> index 29cd11d5a3cf..4cef6fafa1d8 100644
> --- a/include/linux/firmware/cirrus/cs_dsp.h
> +++ b/include/linux/firmware/cirrus/cs_dsp.h
> @@ -42,6 +42,16 @@
> #define CS_DSP_ACKED_CTL_MIN_VALUE 0
> #define CS_DSP_ACKED_CTL_MAX_VALUE 0xFFFFFF
>
> +/*
> + * Write sequence operation codes
> + */
> +#define CS_DSP_WSEQ_FULL 0x00
> +#define CS_DSP_WSEQ_ADDR8 0x02
> +#define CS_DSP_WSEQ_L16 0x04
> +#define CS_DSP_WSEQ_H16 0x05
> +#define CS_DSP_WSEQ_UNLOCK 0xFD
> +#define CS_DSP_WSEQ_END 0xFF
> +
> /**
> * struct cs_dsp_region - Describes a logical memory region in DSP address space
> * @type: Memory region type
> @@ -255,6 +265,23 @@ struct cs_dsp_alg_region *cs_dsp_find_alg_region(struct cs_dsp *dsp,
>
> const char *cs_dsp_mem_region_name(unsigned int type);
>
> +/**
> + * struct cs_dsp_wseq - Describes a write sequence
> + * @ctl: Write sequence cs_dsp control
> + * @ops: Operations contained within
> + */
> +struct cs_dsp_wseq {
> + struct cs_dsp_coeff_ctl *ctl;
> + struct list_head ops;
> +};
> +
> +int cs_dsp_wseq_init(struct cs_dsp *dsp, struct cs_dsp_wseq *wseqs, unsigned int num_wseqs);
> +int cs_dsp_wseq_write(struct cs_dsp *dsp, struct cs_dsp_wseq *wseq, u32 addr, u32 data,
> + u8 op_code, bool update);
> +int cs_dsp_wseq_multi_write(struct cs_dsp *dsp, struct cs_dsp_wseq *wseq,
> + const struct reg_sequence *reg_seq, int num_regs,
> + u8 op_code, bool update);
> +
> /**
> * struct cs_dsp_chunk - Describes a buffer holding data formatted for the DSP
> * @data: Pointer to underlying buffer memory
> --
> 2.34.1
>
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