[PATCH v2 6/6] remoteproc: qcom: Add q6v5-wcss rproc ops

Sricharan R
2017-08-30T15:13:44Z

q6v5-wcss core's start function is mostly common
with the q6v5 of msm8996. So reuse that and add
the stop function.

Signed-off-by: Sricharan R <sricharan@codeaurora.org>
---
drivers/remoteproc/qcom_q6v5_pil.c | 212 +++++++++++++++++++++++++++++++++++++
1 file changed, 212 insertions(+)

diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c
index 8da1cc7..5661487 100644
--- a/drivers/remoteproc/qcom_q6v5_pil.c
+++ b/drivers/remoteproc/qcom_q6v5_pil.c
@@ -104,6 +104,17 @@
#define QDSP6SS_XO_CBCR 0x0038
#define QDSP6SS_ACC_OVERRIDE_VAL 0x20

+/* QDSP6v5-WCSS config/status registers */
+#define TCSR_GLOBAL_CFG0 0x0
+#define TCSR_GLOBAL_CFG1 0x4
+#define SSCAON_CONFIG 0x8
+#define SSCAON_STATUS 0xc
+#define QDSP6SS_BHS_STATUS 0x78
+#define QDSP6SS_RST_EVB 0x10
+
+#define BHS_EN_REST_ACK BIT(0)
+#define SSCAON_ENABLE BIT(13)
+
struct reg_info {
struct regulator *reg;
int uV;
@@ -774,6 +785,61 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
return ret < 0 ? ret : 0;
}

+static int q6v5_wcss_start(struct rproc *rproc)
+{
+ struct q6v5 *qproc = rproc->priv;
+ int ret = 0;
+
+ ret = q6v5_clk_enable(qproc->dev, qproc->active_clks,
+ qproc->active_clk_count);
+ if (ret) {
+ dev_err(qproc->dev, "failed to enable clocks\n");
+ return ret;
+ }
+
+ /* Release Q6 and WCSS reset */
+ ret = reset_control_deassert(qproc->wcss_reset);
+ if (ret)
+ dev_err(qproc->dev, "wcss_reset failed\n");
+
+ ret = reset_control_deassert(qproc->wcss_q6_reset);
+ if (ret)
+ dev_err(qproc->dev, "wcss_q6_reset failed\n");
+
+ /* Lithium configuration - clock gating and bus arbitration */
+ ret = regmap_update_bits(qproc->halt_map,
+ qproc->halt_nc + TCSR_GLOBAL_CFG0,
+ 0x1F, 0x14);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(qproc->halt_map,
+ qproc->halt_nc + TCSR_GLOBAL_CFG1,
+ 1, 0);
+ if (ret)
+ return ret;
+
+ /* Write bootaddr to EVB so that Q6WCSS will jump there after reset */
+ writel(rproc->bootaddr >> 4, qproc->reg_base + QDSP6SS_RST_EVB);
+
+ ret = q6v5_reset(qproc);
+ if (ret)
+ return ret;
+
+ q6v5_reset_rest(qproc);
+
+ ret = wait_for_completion_timeout(&qproc->start_done,
+ msecs_to_jiffies(5000));
+ if (ret == 0) {
+ dev_err(qproc->dev, "start timed out\n");
+ return -ETIMEDOUT;
+ }
+
+ qproc->running = true;
+
+ return 0;
+}
+
static int q6v5_start(struct rproc *rproc)
{
struct q6v5 *qproc = (struct q6v5 *)rproc->priv;
@@ -893,6 +959,146 @@ static int q6v5_start(struct rproc *rproc)
return ret;
}

+static int q6v5_wcss_powerdown(struct q6v5 *qproc)
+{
+ unsigned int val = 0;
+ int ret;
+
+ /* 1 - Assert WCSS/Q6 HALTREQ */
+ q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem);
+
+ /* 2 - Enable WCSSAON_CONFIG */
+ val = readl(qproc->rmb_base + SSCAON_CONFIG);
+ val |= SSCAON_ENABLE;
+ writel(val, qproc->rmb_base + SSCAON_CONFIG);
+
+ /* 3 - Set SSCAON_CONFIG */
+ val |= BIT(15);
+ val &= ~BIT(16);
+ val &= ~BIT(17);
+ val &= ~BIT(18);
+ writel(val, qproc->rmb_base + SSCAON_CONFIG);
+
+ /* 4 - SSCAON_CONFIG 1 */
+ val |= BIT(1);
+ writel(val, qproc->rmb_base + SSCAON_CONFIG);
+
+ /* 5 - wait for SSCAON_STATUS */
+ ret = readl_poll_timeout(qproc->rmb_base + SSCAON_STATUS,
+ val, (val & 0xffff) == 0x400, 1000,
+ HALT_CHECK_MAX_LOOPS);
+ if (ret) {
+ dev_err(qproc->dev,
+ "can't get SSCAON_STATUS rc:%d)\n", ret);
+ }
+
+ /* 6 - De-assert WCSS_AON reset */
+ reset_control_assert(qproc->wcss_aon_reset);
+
+ /* 7 - Disable WCSSAON_CONFIG 13 */
+ val = readl(qproc->rmb_base + SSCAON_CONFIG);
+ val &= ~SSCAON_ENABLE;
+ writel(val, qproc->rmb_base + SSCAON_CONFIG);
+
+ /* 8 - De-assert WCSS/Q6 HALTREQ */
+ reset_control_assert(qproc->wcss_reset);
+
+ return ret;
+}
+
+static int q6v5_q6_powerdown(struct q6v5 *qproc)
+{
+ int i = 0, ret;
+ unsigned int val = 0;
+
+ /* 1 - Halt Q6 bus interface */
+ q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_q6);
+
+ /* 2 - Disable Q6 Core clock */
+ val = readl(qproc->reg_base + QDSP6SS_GFMUX_CTL_REG);
+ val &= ~Q6SS_CLK_ENABLE;
+ writel(val, qproc->reg_base + QDSP6SS_GFMUX_CTL_REG);
+
+ /* 3 - Clamp I/O */
+ val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ val |= Q6SS_CLAMP_IO;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+
+ /* 4 - Clamp WL */
+ val |= QDSS_BHS_ON;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+
+ /* 5 - Clear Erase standby */
+ val &= ~Q6SS_L2DATA_STBY_N;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+
+ /* 6 - Clear Sleep RTN */
+ val &= ~Q6SS_SLP_RET_N;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+
+ /* 7 - turn off QDSP6 memory foot/head switch one bank at a time */
+ for (i = 0; i < 20; i++) {
+ val = readl(qproc->reg_base + QDSP6SS_MEM_PWR_CTL);
+ val &= ~BIT(i);
+ writel(val, qproc->reg_base + QDSP6SS_MEM_PWR_CTL);
+ mdelay(1);
+ }
+ /* 8 - Assert QMC memory RTN */
+ val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ val |= QDSP6v56_CLAMP_QMC_MEM;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+
+ /* 9 - Turn off BHS */
+ val &= ~QDSP6v56_BHS_ON;
+ writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+ udelay(1);
+ /* 10 - Wait till BHS Reset is done */
+ ret = readl_poll_timeout(qproc->reg_base + QDSP6SS_BHS_STATUS,
+ val, !(val & BHS_EN_REST_ACK), 1000,
+ HALT_CHECK_MAX_LOOPS);
+ if (ret) {
+ dev_err(qproc->dev,
+ "BHS_STATUS not OFF (rc:%d)\n", ret);
+ }
+
+ /* 11 - Enable Q6 Block reset */
+ reset_control_assert(qproc->wcss_q6_reset);
+
+ return 0;
+}
+
+static int q6v5_wcss_stop(struct rproc *rproc)
+{
+ struct q6v5 *qproc = rproc->priv;
+ int ret = 0;
+
+ qproc->running = false;
+
+ /* WCSS powerdown */
+ 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");
+ return -ETIMEDOUT;
+ }
+
+ qcom_smem_state_update_bits(qproc->state, BIT(qproc->stop_bit), 0);
+
+ ret = q6v5_wcss_powerdown(qproc);
+ if (ret)
+ return ret;
+
+ /* Q6 Power down */
+ ret = q6v5_q6_powerdown(qproc);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
static int q6v5_stop(struct rproc *rproc)
{
struct q6v5 *qproc = (struct q6v5 *)rproc->priv;
@@ -954,6 +1160,11 @@ static void *q6v5_da_to_va(struct rproc *rproc, u64 da, int len)
.da_to_va = q6v5_da_to_va,
};

+static const struct rproc_ops q6v5_wcss_ops = {
+ .start = q6v5_wcss_start,
+ .stop = q6v5_wcss_stop,
+};
+
static irqreturn_t q6v5_wdog_interrupt(int irq, void *dev)
{
struct q6v5 *qproc = dev;
@@ -1400,6 +1611,7 @@ static int q6v5_remove(struct platform_device *pdev)
.version = WCSS_IPQ8074,
.init_reset = q6v5_wcss_init_reset,
.fw_ops = &q6v5_wcss_fw_ops,
+ .ops = &q6v5_wcss_ops,
};

static const struct of_device_id q6v5_of_match[] = {