From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avaneesh Kumar Dwivedi Subject: [PATCH 4/5] remoteproc: Add start and shutdown interface for q6v55 Date: Mon, 24 Oct 2016 21:25:58 +0530 Message-ID: <1477324559-24752-5-git-send-email-akdwived@codeaurora.org> References: <1477324559-24752-1-git-send-email-akdwived@codeaurora.org> Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]:55432 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S941090AbcJXP4Y (ORCPT ); Mon, 24 Oct 2016 11:56:24 -0400 In-Reply-To: <1477324559-24752-1-git-send-email-akdwived@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org List-Id: linux-arm-msm@vger.kernel.org To: bjorn.andersson@linaro.org Cc: linux-remoteproc@vger.kernel.org, linux-arm-msm@vger.kernel.org, spjoshi@codeaurora.org, akdwived@codeaurora.org, kaushalk@codeaurora.org Adding start and shutdown interface to invoke q6v55 remoteproc. Additionally maintaining boot count and protecting start and shutdown sequence with lock. Signed-off-by: Avaneesh Kumar Dwivedi --- drivers/remoteproc/qcom_q6v5_pil.c | 166 +++++++++++++++++++++++++++++++++++-- 1 file changed, 160 insertions(+), 6 deletions(-) diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c index 0fac8d8..dd19d41 100644 --- a/drivers/remoteproc/qcom_q6v5_pil.c +++ b/drivers/remoteproc/qcom_q6v5_pil.c @@ -789,9 +789,8 @@ static int q6v5_mpss_load(struct q6v5 *qproc) return ret < 0 ? ret : 0; } -static int q6v5_start(struct rproc *rproc) +static int q6v5_start(struct q6v5 *qproc) { - struct q6v5 *qproc = (struct q6v5 *)rproc->priv; int ret; ret = q6v5_regulator_enable(qproc); @@ -873,9 +872,75 @@ static int q6v5_start(struct rproc *rproc) return ret; } -static int q6v5_stop(struct rproc *rproc) +static int q6v55_start(struct q6v5 *qproc) +{ + int ret; + + ret = q6v55_proxy_vote(qproc); + if (ret) { + dev_err(qproc->dev, "failed to enable supplies\n"); + return ret; + } + + ret = q6v55_clk_enable(qproc); + if (ret) { + dev_err(qproc->dev, "failed to enable clocks\n"); + goto err_clks; + } + + pil_mss_restart_reg(qproc, 0); + + writel_relaxed(qproc->mba_phys, qproc->rmb_base + RMB_MBA_IMAGE_REG); + + ret = q6v6proc_reset(qproc); + if (ret) + goto halt_axi_ports; + + ret = q6v5_rmb_mba_wait(qproc, 0, 5000); + if (ret == -ETIMEDOUT) { + dev_err(qproc->dev, "MBA boot timed out\n"); + goto halt_axi_ports; + } else if (ret != RMB_MBA_XPU_UNLOCKED && + ret != RMB_MBA_XPU_UNLOCKED_SCRIBBLED) { + dev_err(qproc->dev, "MBA returned unexpected status %d\n", ret); + ret = -EINVAL; + goto halt_axi_ports; + } + + dev_info(qproc->dev, "MBA booted, loading mpss\n"); + + ret = q6v5_mpss_load(qproc); + if (ret) + goto halt_axi_ports; + + ret = wait_for_completion_timeout(&qproc->start_done, + msecs_to_jiffies(10000)); + if (ret == 0) { + dev_err(qproc->dev, "start timed out\n"); + ret = -ETIMEDOUT; + goto halt_axi_ports; + } + + qproc->running = true; + + /* TODO: All done, release the handover resources */ + + return 0; + +halt_axi_ports: + q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_q6); + q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem); + q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc); + q6v55_clk_disable(qproc); +err_clks: + pil_mss_restart_reg(qproc, 1); + q6v55_proxy_unvote(qproc); + + return ret; +} + +static int q6v5_stop(struct q6v5 *qproc) { - struct q6v5 *qproc = (struct q6v5 *)rproc->priv; int ret; qproc->running = false; @@ -903,6 +968,93 @@ static int q6v5_stop(struct rproc *rproc) return 0; } +static int q6v55_stop(struct q6v5 *qproc) +{ + int ret; + u64 val; + + qcom_smem_state_update_bits(qproc->state, + BIT(qproc->stop_bit), BIT(qproc->stop_bit)); + + ret = wait_for_completion_timeout(&qproc->stop_done, + msecs_to_jiffies(5000)); + if (ret == 0) + dev_err(qproc->dev, "timed out on wait\n"); + + qcom_smem_state_update_bits(qproc->state, BIT(qproc->stop_bit), 0); + + q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_q6); + q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem); + q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc); + + /* + * Assert QDSP6 I/O clamp, memory wordline clamp, and compiler + * memory clamp as a software workaround to avoid high MX + * current during LPASS/MSS restart. + */ + + val = readl_relaxed(qproc->reg_base + QDSP6SS_PWR_CTL_REG); + val |= (Q6SS_CLAMP_IO | QDSP6v55_CLAMP_WL | + QDSP6v55_CLAMP_QMC_MEM); + writel_relaxed(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG); + + pil_mss_restart_reg(qproc, 1); + if (qproc->running) { + q6v55_clk_disable(qproc); + q6v55_proxy_unvote(qproc); + qproc->running = false; + } + + return 0; +} + +static int mss_boot(struct rproc *rproc) +{ + struct q6v5 *qproc = (struct q6v5 *)rproc->priv; + int ret; + + mutex_lock(&qproc->q6_lock); + if (!qproc->boot_count) { + if (qproc->is_q6v55) { + ret = q6v55_start(qproc); + if (ret) + goto err_start; + } else { + ret = q6v5_start(qproc); + if (ret) + goto err_start; + } + } + qproc->boot_count++; + mutex_unlock(&qproc->q6_lock); + return 0; + +err_start: + mutex_unlock(&qproc->q6_lock); + if (qproc->is_q6v55) + q6v55_stop(qproc); + else + q6v5_stop(qproc); + + return ret; +} + +static int mss_stop(struct rproc *rproc) +{ + struct q6v5 *qproc = (struct q6v5 *)rproc->priv; + int ret; + + mutex_lock(&qproc->q6_lock); + if (!--qproc->boot_count) { + if (qproc->is_q6v55) + ret = q6v55_stop(qproc); + else + ret = q6v5_stop(qproc); + } + mutex_unlock(&qproc->q6_lock); + return ret; +} + static void *q6v5_da_to_va(struct rproc *rproc, u64 da, int len) { struct q6v5 *qproc = rproc->priv; @@ -916,8 +1068,8 @@ static void *q6v5_da_to_va(struct rproc *rproc, u64 da, int len) } static const struct rproc_ops q6v5_ops = { - .start = q6v5_start, - .stop = q6v5_stop, + .start = mss_boot, + .stop = mss_stop, .da_to_va = q6v5_da_to_va, }; @@ -972,6 +1124,8 @@ static irqreturn_t q6v5_handover_interrupt(int irq, void *dev) struct q6v5 *qproc = dev; complete(&qproc->start_done); + if (qproc->is_q6v55) + q6v55_proxy_unvote(qproc); return IRQ_HANDLED; } -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project