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soc: fsl: cpm1: qmc: Handle QUICC Engine (QE) soft-qmc firmware

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The QUICC Engine (QE) QMC can use a firmware to have the QMC working in
'soft-qmc' mode.

Handle this optional 'soft-qmc' firmware.

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20240808071132.149251-36-herve.codina@bootlin.com
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
This commit is contained in:
Herve Codina 2024-08-08 09:11:28 +02:00 committed by Christophe Leroy
parent eb680d5630
commit 8655b76b70
1 changed files with 67 additions and 0 deletions
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67
drivers/soc/fsl/qe/qmc.c
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@ -10,6 +10,7 @@
#include <soc/fsl/qe/qmc.h>
#include <linux/bitfield.h>
#include <linux/dma-mapping.h>
#include <linux/firmware.h>
#include <linux/hdlc.h>
#include <linux/interrupt.h>
#include <linux/io.h>
@ -1649,6 +1650,66 @@ static irqreturn_t qmc_irq_handler(int irq, void *priv)
return IRQ_HANDLED;
}
static int qmc_qe_soft_qmc_init(struct qmc *qmc, struct device_node *np)
{
struct qe_firmware_info *qe_fw_info;
const struct qe_firmware *qe_fw;
const struct firmware *fw;
const char *filename;
int ret;
ret = of_property_read_string(np, "fsl,soft-qmc", &filename);
switch (ret) {
case 0:
break;
case -EINVAL:
/* fsl,soft-qmc property not set -> Simply do nothing */
return 0;
default:
dev_err(qmc->dev, "%pOF: failed to read fsl,soft-qmc\n",
np);
return ret;
}
qe_fw_info = qe_get_firmware_info();
if (qe_fw_info) {
if (!strstr(qe_fw_info->id, "Soft-QMC")) {
dev_err(qmc->dev, "Another Firmware is already loaded\n");
return -EALREADY;
}
dev_info(qmc->dev, "Firmware already loaded\n");
return 0;
}
dev_info(qmc->dev, "Using firmware %s\n", filename);
ret = request_firmware(&fw, filename, qmc->dev);
if (ret) {
dev_err(qmc->dev, "Failed to request firmware %s\n", filename);
return ret;
}
qe_fw = (const struct qe_firmware *)fw->data;
if (fw->size < sizeof(qe_fw->header) ||
be32_to_cpu(qe_fw->header.length) != fw->size) {
dev_err(qmc->dev, "Invalid firmware %s\n", filename);
ret = -EINVAL;
goto end;
}
ret = qe_upload_firmware(qe_fw);
if (ret) {
dev_err(qmc->dev, "Failed to load firmware %s\n", filename);
goto end;
}
ret = 0;
end:
release_firmware(fw);
return ret;
}
static int qmc_cpm1_init_resources(struct qmc *qmc, struct platform_device *pdev)
{
struct resource *res;
@ -1855,6 +1916,12 @@ static int qmc_probe(struct platform_device *pdev)
if (ret)
return ret;
if (qmc_is_qe(qmc)) {
ret = qmc_qe_soft_qmc_init(qmc, np);
if (ret)
return ret;
}
/* Parse channels informationss */
ret = qmc_of_parse_chans(qmc, np);
if (ret)