[PATCH v8 05/11] remoteproc: mediatek: Extract remoteproc initialization flow

Tinghan Shen
2023-03-03T08:34:29Z

This is the preparation for probing multi-core SCP. The remoteproc
initialization flow is similar on cores and is reuesd to avoid
redundant code.

The registers of config and l1tcm are shared for multi-core
SCP. Reuse the mapped addresses for all cores.

Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
drivers/remoteproc/mtk_scp.c | 62 ++++++++++++++++++++++++------------
1 file changed, 42 insertions(+), 20 deletions(-)

diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index a3b9bc158cd9..bdb5d87eeaa3 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -23,6 +23,13 @@
#define MAX_CODE_SIZE 0x500000
#define SECTION_NAME_IPI_BUFFER ".ipi_buffer"

+struct mtk_scp_of_regs {
+ void __iomem *reg_base;
+ void __iomem *l1tcm_base;
+ size_t l1tcm_size;
+ phys_addr_t l1tcm_phys;
+};
+
/**
* scp_get() - get a reference to SCP.
*
@@ -855,7 +862,8 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp)
}
}

-static int scp_probe(struct platform_device *pdev)
+static int scp_rproc_init(struct platform_device *pdev,
+ struct mtk_scp_of_regs *of_regs)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
@@ -879,6 +887,11 @@ static int scp_probe(struct platform_device *pdev)
scp->data = of_device_get_match_data(dev);
platform_set_drvdata(pdev, scp);

+ scp->reg_base = of_regs->reg_base;
+ scp->l1tcm_base = of_regs->l1tcm_base;
+ scp->l1tcm_size = of_regs->l1tcm_size;
+ scp->l1tcm_phys = of_regs->l1tcm_phys;
+
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
scp->sram_base = devm_ioremap_resource(dev, res);
if (IS_ERR(scp->sram_base))
@@ -888,24 +901,6 @@ static int scp_probe(struct platform_device *pdev)
scp->sram_size = resource_size(res);
scp->sram_phys = res->start;

- /* l1tcm is an optional memory region */
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
- scp->l1tcm_base = devm_ioremap_resource(dev, res);
- if (IS_ERR(scp->l1tcm_base)) {
- ret = PTR_ERR(scp->l1tcm_base);
- if (ret != -EINVAL) {
- return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
- }
- } else {
- scp->l1tcm_size = resource_size(res);
- scp->l1tcm_phys = res->start;
- }
-
- scp->reg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
- if (IS_ERR(scp->reg_base))
- return dev_err_probe(dev, PTR_ERR(scp->reg_base),
- "Failed to parse and map cfg memory\n");
-
ret = scp->data->scp_clk_get(scp);
if (ret)
return ret;
@@ -933,7 +928,6 @@ static int scp_probe(struct platform_device *pdev)
ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0), NULL,
scp_irq_handler, IRQF_ONESHOT,
pdev->name, scp);
-
if (ret) {
dev_err(dev, "failed to request irq\n");
goto remove_subdev;
@@ -957,6 +951,34 @@ static int scp_probe(struct platform_device *pdev)
return ret;
}

+static int scp_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ struct mtk_scp_of_regs scp_regs;
+ int ret;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
+ scp_regs.reg_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(scp_regs.reg_base))
+ return dev_err_probe(dev, PTR_ERR(scp_regs.reg_base),
+ "Failed to parse and map cfg memory\n");
+
+ /* l1tcm is an optional memory region */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
+ scp_regs.l1tcm_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(scp_regs.l1tcm_base)) {
+ ret = PTR_ERR(scp_regs.l1tcm_base);
+ if (ret != -EINVAL)
+ return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
+ } else {
+ scp_regs.l1tcm_size = resource_size(res);
+ scp_regs.l1tcm_phys = res->start;
+ }
+
+ return scp_rproc_init(pdev, &scp_regs);
+}
+
static int scp_remove(struct platform_device *pdev)
{
struct mtk_scp *scp = platform_get_drvdata(pdev);
--
2.18.0