From: Christophe Leroy <christophe.leroy@csgroup.eu>
Date: Wed, 3 May 2023 07:20:15 +0000 (+0200)
Subject: serial, mpc8xx: Take parameter RAM relocation into account
X-Git-Url: http://git.dujemihanovic.xyz/img/static/git-logo.png?a=commitdiff_plain;h=388cb1a10f091e494b837a8666d49866e9c7b1e2;p=u-boot.git

serial, mpc8xx: Take parameter RAM relocation into account

Instead of inhibiting parameter RAM relacation, take
into account the configured one.

It means INIT_TRX command cannot be used and must be done
manually as explained in the microcode patch application note.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---

diff --git a/drivers/serial/serial_mpc8xx.c b/drivers/serial/serial_mpc8xx.c
index beffc34d11..d82760c7f1 100644
--- a/drivers/serial/serial_mpc8xx.c
+++ b/drivers/serial/serial_mpc8xx.c
@@ -83,6 +83,7 @@ static int serial_mpc8xx_probe(struct udevice *dev)
 	immap_t __iomem *im = (immap_t __iomem *)CONFIG_SYS_IMMR;
 	smc_t __iomem *sp;
 	smc_uart_t __iomem *up;
+	u16 smc_rpbase;
 	cpm8xx_t __iomem *cp = &(im->im_cpm);
 	struct serialbuffer __iomem *rtx;
 
@@ -90,8 +91,10 @@ static int serial_mpc8xx_probe(struct udevice *dev)
 
 	sp = cp->cp_smc + SMC_INDEX;
 	up = (smc_uart_t __iomem *)&cp->cp_dpmem[PROFF_SMC];
-	/* Disable relocation */
-	out_be16(&up->smc_rpbase, 0);
+
+	smc_rpbase = in_be16(&up->smc_rpbase);
+	if (smc_rpbase)
+		up = (smc_uart_t __iomem *)&cp->cp_dpmem[smc_rpbase];
 
 	/* Disable transmitter/receiver. */
 	clrbits_be16(&sp->smc_smcmr, SMCMR_REN | SMCMR_TEN);
@@ -154,15 +157,12 @@ static int serial_mpc8xx_probe(struct udevice *dev)
 	out_be16(&up->smc_maxidl, CONFIG_SYS_MAXIDLE);
 	out_be32(&rtx->rxindex, 0);
 
-	/* Initialize Tx/Rx parameters.	*/
-	while (in_be16(&cp->cp_cpcr) & CPM_CR_FLG)	/* wait if cp is busy */
-		;
-
-	out_be16(&cp->cp_cpcr,
-		 mk_cr_cmd(CPM_CR_CH_SMC, CPM_CR_INIT_TRX) | CPM_CR_FLG);
-
-	while (in_be16(&cp->cp_cpcr) & CPM_CR_FLG)	/* wait if cp is busy */
-		;
+	out_be32(&up->smc_rstate, 0);
+	out_be32(&up->smc_tstate, 0);
+	out_be16(&up->smc_rbptr, CPM_SERIAL_BASE);
+	out_be16(&up->smc_tbptr, CPM_SERIAL_BASE + sizeof(cbd_t));
+	out_be16(&up->smc_brkcr, 1);
+	out_be16(&up->smc_brkec, 0);
 
 	/* Enable transmitter/receiver.	*/
 	setbits_be16(&sp->smc_smcmr, SMCMR_REN | SMCMR_TEN);