net: ti: prueth: Adds support for PRUETH on AM33x and AM43x SOCs

Adds support for AM335x and AM437x datasets. Dual-EMAC and Switch mode
firmware elf file to switch between protocols at run time.

Added API hooks for IEP module (legacy 32-bit model) to support
timestamping requests from application.

Signed-off-by: Roger Quadros <[email protected]>
Signed-off-by: Andrew F. Davis <[email protected]>
Signed-off-by: Basharath Hussain Khaja <[email protected]>
Signed-off-by: Parvathi Pudi <[email protected]>
Signed-off-by: NipaLocal <nipa@local>

Author: Roger Quadros

drivers/net/ethernet/ti/icssg/icss_iep.c

@@ -1006,6 +1006,59 @@ static const struct icss_iep_plat_data am57xx_icss_iep_plat_data = {
 	.config = &am654_icss_iep_regmap_config,
 };
 
+static bool am335x_icss_iep_valid_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case ICSS_IEP_GLOBAL_CFG_REG ... ICSS_IEP_CAPTURE_STAT_REG:
+	case ICSS_IEP_CAP6_RISE_REG0:
+	case ICSS_IEP_CMP_CFG_REG ... ICSS_IEP_CMP0_REG0:
+	case ICSS_IEP_CMP8_REG0 ... ICSS_IEP_SYNC_START_REG:
+		return true;
+	default:
+		return false;
+	}
+
+	return false;
+}
+
+static const struct regmap_config am335x_icss_iep_regmap_config = {
+	.name = "icss iep",
+	.reg_stride = 1,
+	.reg_write = icss_iep_regmap_write,
+	.reg_read = icss_iep_regmap_read,
+	.writeable_reg = am335x_icss_iep_valid_reg,
+	.readable_reg = am335x_icss_iep_valid_reg,
+};
+
+static const struct icss_iep_plat_data am335x_icss_iep_plat_data = {
+	.flags = 0,
+	.reg_offs = {
+		[ICSS_IEP_GLOBAL_CFG_REG] = 0x00,
+		[ICSS_IEP_COMPEN_REG] = 0x08,
+		[ICSS_IEP_COUNT_REG0] = 0x0C,
+		[ICSS_IEP_CAPTURE_CFG_REG] = 0x10,
+		[ICSS_IEP_CAPTURE_STAT_REG] = 0x14,
+
+		[ICSS_IEP_CAP6_RISE_REG0] = 0x30,
+
+		[ICSS_IEP_CAP7_RISE_REG0] = 0x38,
+
+		[ICSS_IEP_CMP_CFG_REG] = 0x40,
+		[ICSS_IEP_CMP_STAT_REG] = 0x44,
+		[ICSS_IEP_CMP0_REG0] = 0x48,
+
+		[ICSS_IEP_CMP8_REG0] = 0x88,
+		[ICSS_IEP_SYNC_CTRL_REG] = 0x100,
+		[ICSS_IEP_SYNC0_STAT_REG] = 0x108,
+		[ICSS_IEP_SYNC1_STAT_REG] = 0x10C,
+		[ICSS_IEP_SYNC_PWIDTH_REG] = 0x110,
+		[ICSS_IEP_SYNC0_PERIOD_REG] = 0x114,
+		[ICSS_IEP_SYNC1_DELAY_REG] = 0x118,
+		[ICSS_IEP_SYNC_START_REG] = 0x11C,
+	},
+	.config = &am335x_icss_iep_regmap_config,
+};
+
 static const struct of_device_id icss_iep_of_match[] = {
 	{
 		.compatible = "ti,am654-icss-iep",
@@ -1015,6 +1068,14 @@ static const struct of_device_id icss_iep_of_match[] = {
 		.compatible = "ti,am5728-icss-iep",
 		.data = &am57xx_icss_iep_plat_data,
 	},
+	{
+		.compatible = "ti,am3356-icss-iep",
+		.data = &am335x_icss_iep_plat_data,
+	},
+	{
+		.compatible = "ti,am4376-icss-iep",
+		.data = &am335x_icss_iep_plat_data,
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, icss_iep_of_match);

drivers/net/ethernet/ti/icssm/icssm_prueth.c

@@ -2138,6 +2138,10 @@ static int icssm_prueth_probe(struct platform_device *pdev)
 	}
 
 	prueth->ocmc_ram_size = OCMC_RAM_SIZE;
+	/* Decreased by 8KB to address the reserved region for AM33x */
+	if (prueth->fw_data->driver_data == PRUSS_AM33XX)
+		prueth->ocmc_ram_size = (SZ_64K - SZ_8K);
+
 	prueth->mem[PRUETH_MEM_OCMC].va =
 			(void __iomem *)gen_pool_alloc(prueth->sram_pool,
 						       prueth->ocmc_ram_size);
@@ -2381,6 +2385,32 @@ static const struct dev_pm_ops prueth_dev_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(icssm_prueth_suspend, icssm_prueth_resume)
 };
 
+/* AM335x SoC-specific firmware data */
+static struct prueth_private_data am335x_prueth_pdata = {
+	.driver_data = PRUSS_AM33XX,
+	.fw_pru[PRUSS_PRU0] = {
+		.fw_name[PRUSS_ETHTYPE_EMAC] =
+			"ti-pruss/am335x-pru0-prueth-fw.elf",
+	},
+	.fw_pru[PRUSS_PRU1] = {
+		.fw_name[PRUSS_ETHTYPE_EMAC] =
+			"ti-pruss/am335x-pru1-prueth-fw.elf",
+	},
+};
+
+/* AM437x SoC-specific firmware data */
+static struct prueth_private_data am437x_prueth_pdata = {
+	.driver_data = PRUSS_AM43XX,
+	.fw_pru[PRUSS_PRU0] = {
+		.fw_name[PRUSS_ETHTYPE_EMAC] =
+			"ti-pruss/am437x-pru0-prueth-fw.elf",
+	},
+	.fw_pru[PRUSS_PRU1] = {
+		.fw_name[PRUSS_ETHTYPE_EMAC] =
+			"ti-pruss/am437x-pru1-prueth-fw.elf",
+	},
+};
+
 /* AM57xx SoC-specific firmware data */
 static struct prueth_private_data am57xx_prueth_pdata = {
 	.driver_data = PRUSS_AM57XX,
@@ -2396,6 +2426,8 @@ static struct prueth_private_data am57xx_prueth_pdata = {
 
 static const struct of_device_id prueth_dt_match[] = {
 	{ .compatible = "ti,am57-prueth", .data = &am57xx_prueth_pdata, },
+	{ .compatible = "ti,am4376-prueth", .data = &am437x_prueth_pdata, },
+	{ .compatible = "ti,am3359-prueth", .data = &am335x_prueth_pdata, },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, prueth_dt_match);