diff options
Diffstat (limited to 'drivers/soc/mediatek/mtk-cmdq-helper.c')
| -rw-r--r-- | drivers/soc/mediatek/mtk-cmdq-helper.c | 147 |
1 files changed, 121 insertions, 26 deletions
diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c index 3c82de5f9417..9add0fd5fa6c 100644 --- a/drivers/soc/mediatek/mtk-cmdq-helper.c +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c @@ -9,12 +9,54 @@ #include <linux/mailbox_controller.h> #include <linux/soc/mediatek/mtk-cmdq.h> -#define CMDQ_ARG_A_WRITE_MASK 0xffff #define CMDQ_WRITE_ENABLE_MASK BIT(0) +#define CMDQ_POLL_ENABLE_MASK BIT(0) #define CMDQ_EOC_IRQ_EN BIT(0) #define CMDQ_EOC_CMD ((u64)((CMDQ_CODE_EOC << CMDQ_OP_CODE_SHIFT)) \ << 32 | CMDQ_EOC_IRQ_EN) +struct cmdq_instruction { + union { + u32 value; + u32 mask; + }; + union { + u16 offset; + u16 event; + }; + u8 subsys; + u8 op; +}; + +int cmdq_dev_get_client_reg(struct device *dev, + struct cmdq_client_reg *client_reg, int idx) +{ + struct of_phandle_args spec; + int err; + + if (!client_reg) + return -ENOENT; + + err = of_parse_phandle_with_fixed_args(dev->of_node, + "mediatek,gce-client-reg", + 3, idx, &spec); + if (err < 0) { + dev_err(dev, + "error %d can't parse gce-client-reg property (%d)", + err, idx); + + return err; + } + + client_reg->subsys = (u8)spec.args[0]; + client_reg->offset = (u16)spec.args[1]; + client_reg->size = (u16)spec.args[2]; + of_node_put(spec.np); + + return 0; +} +EXPORT_SYMBOL(cmdq_dev_get_client_reg); + static void cmdq_client_timeout(struct timer_list *t) { struct cmdq_client *client = from_timer(client, t, timer); @@ -110,10 +152,10 @@ void cmdq_pkt_destroy(struct cmdq_pkt *pkt) } EXPORT_SYMBOL(cmdq_pkt_destroy); -static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, enum cmdq_code code, - u32 arg_a, u32 arg_b) +static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, + struct cmdq_instruction inst) { - u64 *cmd_ptr; + struct cmdq_instruction *cmd_ptr; if (unlikely(pkt->cmd_buf_size + CMDQ_INST_SIZE > pkt->buf_size)) { /* @@ -129,8 +171,9 @@ static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, enum cmdq_code code, __func__, (u32)pkt->buf_size); return -ENOMEM; } + cmd_ptr = pkt->va_base + pkt->cmd_buf_size; - (*cmd_ptr) = (u64)((code << CMDQ_OP_CODE_SHIFT) | arg_a) << 32 | arg_b; + *cmd_ptr = inst; pkt->cmd_buf_size += CMDQ_INST_SIZE; return 0; @@ -138,24 +181,34 @@ static int cmdq_pkt_append_command(struct cmdq_pkt *pkt, enum cmdq_code code, int cmdq_pkt_write(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value) { - u32 arg_a = (offset & CMDQ_ARG_A_WRITE_MASK) | - (subsys << CMDQ_SUBSYS_SHIFT); + struct cmdq_instruction inst; - return cmdq_pkt_append_command(pkt, CMDQ_CODE_WRITE, arg_a, value); + inst.op = CMDQ_CODE_WRITE; + inst.value = value; + inst.offset = offset; + inst.subsys = subsys; + + return cmdq_pkt_append_command(pkt, inst); } EXPORT_SYMBOL(cmdq_pkt_write); int cmdq_pkt_write_mask(struct cmdq_pkt *pkt, u8 subsys, u16 offset, u32 value, u32 mask) { - u32 offset_mask = offset; - int err = 0; + struct cmdq_instruction inst = { {0} }; + u16 offset_mask = offset; + int err; if (mask != 0xffffffff) { - err = cmdq_pkt_append_command(pkt, CMDQ_CODE_MASK, 0, ~mask); + inst.op = CMDQ_CODE_MASK; + inst.mask = ~mask; + err = cmdq_pkt_append_command(pkt, inst); + if (err < 0) + return err; + offset_mask |= CMDQ_WRITE_ENABLE_MASK; } - err |= cmdq_pkt_write(pkt, subsys, offset_mask, value); + err = cmdq_pkt_write(pkt, subsys, offset_mask, value); return err; } @@ -163,43 +216,85 @@ EXPORT_SYMBOL(cmdq_pkt_write_mask); int cmdq_pkt_wfe(struct cmdq_pkt *pkt, u16 event) { - u32 arg_b; + struct cmdq_instruction inst = { {0} }; if (event >= CMDQ_MAX_EVENT) return -EINVAL; - /* - * WFE arg_b - * bit 0-11: wait value - * bit 15: 1 - wait, 0 - no wait - * bit 16-27: update value - * bit 31: 1 - update, 0 - no update - */ - arg_b = CMDQ_WFE_UPDATE | CMDQ_WFE_WAIT | CMDQ_WFE_WAIT_VALUE; + inst.op = CMDQ_CODE_WFE; + inst.value = CMDQ_WFE_OPTION; + inst.event = event; - return cmdq_pkt_append_command(pkt, CMDQ_CODE_WFE, event, arg_b); + return cmdq_pkt_append_command(pkt, inst); } EXPORT_SYMBOL(cmdq_pkt_wfe); int cmdq_pkt_clear_event(struct cmdq_pkt *pkt, u16 event) { + struct cmdq_instruction inst = { {0} }; + if (event >= CMDQ_MAX_EVENT) return -EINVAL; - return cmdq_pkt_append_command(pkt, CMDQ_CODE_WFE, event, - CMDQ_WFE_UPDATE); + inst.op = CMDQ_CODE_WFE; + inst.value = CMDQ_WFE_UPDATE; + inst.event = event; + + return cmdq_pkt_append_command(pkt, inst); } EXPORT_SYMBOL(cmdq_pkt_clear_event); +int cmdq_pkt_poll(struct cmdq_pkt *pkt, u8 subsys, + u16 offset, u32 value) +{ + struct cmdq_instruction inst = { {0} }; + int err; + + inst.op = CMDQ_CODE_POLL; + inst.value = value; + inst.offset = offset; + inst.subsys = subsys; + err = cmdq_pkt_append_command(pkt, inst); + + return err; +} +EXPORT_SYMBOL(cmdq_pkt_poll); + +int cmdq_pkt_poll_mask(struct cmdq_pkt *pkt, u8 subsys, + u16 offset, u32 value, u32 mask) +{ + struct cmdq_instruction inst = { {0} }; + int err; + + inst.op = CMDQ_CODE_MASK; + inst.mask = ~mask; + err = cmdq_pkt_append_command(pkt, inst); + if (err < 0) + return err; + + offset = offset | CMDQ_POLL_ENABLE_MASK; + err = cmdq_pkt_poll(pkt, subsys, offset, value); + + return err; +} +EXPORT_SYMBOL(cmdq_pkt_poll_mask); + static int cmdq_pkt_finalize(struct cmdq_pkt *pkt) { + struct cmdq_instruction inst = { {0} }; int err; /* insert EOC and generate IRQ for each command iteration */ - err = cmdq_pkt_append_command(pkt, CMDQ_CODE_EOC, 0, CMDQ_EOC_IRQ_EN); + inst.op = CMDQ_CODE_EOC; + inst.value = CMDQ_EOC_IRQ_EN; + err = cmdq_pkt_append_command(pkt, inst); + if (err < 0) + return err; /* JUMP to end */ - err |= cmdq_pkt_append_command(pkt, CMDQ_CODE_JUMP, 0, CMDQ_JUMP_PASS); + inst.op = CMDQ_CODE_JUMP; + inst.value = CMDQ_JUMP_PASS; + err = cmdq_pkt_append_command(pkt, inst); return err; } |