mpc83xx: retain POR values of non-configured ACR, SPCR, SCCR, and LCRR bitfields

some LCRR bits are not documented throughout the 83xx family RMs.
New board porters copying similar board configurations might omit
setting e.g., DBYP since it was not documented in their SoC's RM.

Prevent them bricking their board by retaining power on reset values
in bit fields that the board porter doesn't explicitly configure
via CONFIG_SYS_<registername>_<bitfield> assignments in the board
config file.

also move LCRR assignment to cpu_init_r[am] to help ensure no
transactions are being executed via the local bus while CLKDIV is being
modified.

also start to use i/o accessors.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

1 files changed, 154 insertions, 107 deletions

diff --git a/cpu/mpc83xx/cpu_init.c b/cpu/mpc83xx/cpu_init.c
index 5c930d3..031e8d5 100644
--- a/cpu/mpc83xx/cpu_init.c
+++ b/cpu/mpc83xx/cpu_init.c
@@ -23,8 +23,8 @@
 #include <common.h>
 #include <mpc83xx.h>
 #include <ioports.h>
-#ifdef CONFIG_USB_EHCI_FSL
 #include <asm/io.h>
+#ifdef CONFIG_USB_EHCI_FSL
 #include <usb/ehci-fsl.h>
 #endif
 
@@ -63,149 +63,163 @@ static void config_qe_ioports(void)
  */
 void cpu_init_f (volatile immap_t * im)
 {
-	/* Pointer is writable since we allocated a register for it */
-	gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
-
-	/* Clear initial global data */
-	memset ((void *) gd, 0, sizeof (gd_t));
-
-	/* system performance tweaking */
-
-#ifdef CONFIG_SYS_ACR_PIPE_DEP
-	/* Arbiter pipeline depth */
-	im->arbiter.acr = (im->arbiter.acr & ~ACR_PIPE_DEP) |
-			  (CONFIG_SYS_ACR_PIPE_DEP << ACR_PIPE_DEP_SHIFT);
+	__be32 acr_mask =
+#ifdef CONFIG_SYS_ACR_PIPE_DEP /* Arbiter pipeline depth */
+		(ACR_PIPE_DEP << ACR_PIPE_DEP_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_ACR_RPTCNT
-	/* Arbiter repeat count */
-	im->arbiter.acr = (im->arbiter.acr & ~(ACR_RPTCNT)) |
-			  (CONFIG_SYS_ACR_RPTCNT << ACR_RPTCNT_SHIFT);
+#ifdef CONFIG_SYS_ACR_RPTCNT /* Arbiter repeat count */
+		(ACR_RPTCNT << ACR_RPTCNT_SHIFT) |
 #endif
-
+		0;
+	__be32 acr_val =
+#ifdef CONFIG_SYS_ACR_PIPE_DEP /* Arbiter pipeline depth */
+		(CONFIG_SYS_ACR_PIPE_DEP << ACR_PIPE_DEP_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_ACR_RPTCNT /* Arbiter repeat count */
+		(CONFIG_SYS_ACR_RPTCNT << ACR_RPTCNT_SHIFT) |
+#endif
+		0;
+	__be32 spcr_mask =
+#ifdef CONFIG_SYS_SPCR_OPT /* Optimize transactions between CSB and other dev */
+		(SPCR_OPT << SPCR_OPT_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_SPCR_TSECEP /* all eTSEC's Emergency priority */
+		(SPCR_TSECEP << SPCR_TSECEP_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_SPCR_TSEC1EP /* TSEC1 Emergency priority */
+		(SPCR_TSEC1EP << SPCR_TSEC1EP_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_SPCR_TSEC2EP /* TSEC2 Emergency priority */
+		(SPCR_TSEC2EP << SPCR_TSEC2EP_SHIFT) |
+#endif
+		0;
+	__be32 spcr_val =
 #ifdef CONFIG_SYS_SPCR_OPT
-	/* Optimize transactions between CSB and other devices */
-	im->sysconf.spcr = (im->sysconf.spcr & ~SPCR_OPT) |
-			   (CONFIG_SYS_SPCR_OPT << SPCR_OPT_SHIFT);
+		(CONFIG_SYS_SPCR_OPT << SPCR_OPT_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_SPCR_TSECEP
-	/* all eTSEC's Emergency priority */
-	im->sysconf.spcr = (im->sysconf.spcr & ~SPCR_TSECEP) |
-			   (CONFIG_SYS_SPCR_TSECEP << SPCR_TSECEP_SHIFT);
+#ifdef CONFIG_SYS_SPCR_TSECEP /* all eTSEC's Emergency priority */
+		(CONFIG_SYS_SPCR_TSECEP << SPCR_TSECEP_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_SPCR_TSEC1EP
-	/* TSEC1 Emergency priority */
-	im->sysconf.spcr = (im->sysconf.spcr & ~SPCR_TSEC1EP) |
-			   (CONFIG_SYS_SPCR_TSEC1EP << SPCR_TSEC1EP_SHIFT);
+#ifdef CONFIG_SYS_SPCR_TSEC1EP /* TSEC1 Emergency priority */
+		(CONFIG_SYS_SPCR_TSEC1EP << SPCR_TSEC1EP_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_SPCR_TSEC2EP
-	/* TSEC2 Emergency priority */
-	im->sysconf.spcr = (im->sysconf.spcr & ~SPCR_TSEC2EP) |
-			   (CONFIG_SYS_SPCR_TSEC2EP << SPCR_TSEC2EP_SHIFT);
+#ifdef CONFIG_SYS_SPCR_TSEC2EP /* TSEC2 Emergency priority */
+		(CONFIG_SYS_SPCR_TSEC2EP << SPCR_TSEC2EP_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_SCCR_ENCCM
-	/* Encryption clock mode */
-	im->clk.sccr = (im->clk.sccr & ~SCCR_ENCCM) |
-		       (CONFIG_SYS_SCCR_ENCCM << SCCR_ENCCM_SHIFT);
+		0;
+	__be32 sccr_mask =
+#ifdef CONFIG_SYS_SCCR_ENCCM /* Encryption clock mode */
+		(SCCR_ENCCM << SCCR_ENCCM_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_SCCR_PCICM
-	/* PCI & DMA clock mode */
-	im->clk.sccr = (im->clk.sccr & ~SCCR_PCICM) |
-		       (CONFIG_SYS_SCCR_PCICM << SCCR_PCICM_SHIFT);
+#ifdef CONFIG_SYS_SCCR_PCICM /* PCI & DMA clock mode */
+		(SCCR_PCICM << SCCR_PCICM_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_SCCR_TSECCM
-	/* all TSEC's clock mode */
-	im->clk.sccr = (im->clk.sccr & ~SCCR_TSECCM) |
-		       (CONFIG_SYS_SCCR_TSECCM << SCCR_TSECCM_SHIFT);
+#ifdef CONFIG_SYS_SCCR_TSECCM /* all TSEC's clock mode */
+		(SCCR_TSECCM << SCCR_TSECCM_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_SCCR_TSEC1CM
-	/* TSEC1 clock mode */
-	im->clk.sccr = (im->clk.sccr & ~SCCR_TSEC1CM) |
-		       (CONFIG_SYS_SCCR_TSEC1CM << SCCR_TSEC1CM_SHIFT);
+#ifdef CONFIG_SYS_SCCR_TSEC1CM /* TSEC1 clock mode */
+		(SCCR_TSEC1CM << SCCR_TSEC1CM_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_SCCR_TSEC2CM
-	/* TSEC2 clock mode */
-	im->clk.sccr = (im->clk.sccr & ~SCCR_TSEC2CM) |
-		       (CONFIG_SYS_SCCR_TSEC2CM << SCCR_TSEC2CM_SHIFT);
+#ifdef CONFIG_SYS_SCCR_TSEC2CM /* TSEC2 clock mode */
+		(SCCR_TSEC2CM << SCCR_TSEC2CM_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_SCCR_TSEC1ON
-	/* TSEC1 clock switch */
-	im->clk.sccr = (im->clk.sccr & ~SCCR_TSEC1ON) |
-		       (CONFIG_SYS_SCCR_TSEC1ON << SCCR_TSEC1ON_SHIFT);
+#ifdef CONFIG_SYS_SCCR_TSEC1ON /* TSEC1 clock switch */
+		(SCCR_TSEC1ON << SCCR_TSEC1ON_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_SCCR_TSEC2ON
-	/* TSEC2 clock switch */
-	im->clk.sccr = (im->clk.sccr & ~SCCR_TSEC2ON) |
-		       (CONFIG_SYS_SCCR_TSEC2ON << SCCR_TSEC2ON_SHIFT);
+#ifdef CONFIG_SYS_SCCR_TSEC2ON /* TSEC2 clock switch */
+		(SCCR_TSEC2ON << SCCR_TSEC2ON_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_SCCR_USBMPHCM
-	/* USB MPH clock mode */
-	im->clk.sccr = (im->clk.sccr & ~SCCR_USBMPHCM) |
-		       (CONFIG_SYS_SCCR_USBMPHCM << SCCR_USBMPHCM_SHIFT);
+#ifdef CONFIG_SYS_SCCR_USBMPHCM /* USB MPH clock mode */
+		(SCCR_USBMPHCM << SCCR_USBMPHCM_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_SCCR_USBDRCM
-	/* USB DR clock mode */
-	im->clk.sccr = (im->clk.sccr & ~SCCR_USBDRCM) |
-		       (CONFIG_SYS_SCCR_USBDRCM << SCCR_USBDRCM_SHIFT);
+#ifdef CONFIG_SYS_SCCR_USBDRCM /* USB DR clock mode */
+		(SCCR_USBDRCM << SCCR_USBDRCM_SHIFT) |
 #endif
-
-#ifdef CONFIG_SYS_SCCR_SATACM
-	/* SATA controller clock mode */
-	im->clk.sccr = (im->clk.sccr & ~SCCR_SATACM) |
-		       (CONFIG_SYS_SCCR_SATACM << SCCR_SATACM_SHIFT);
+#ifdef CONFIG_SYS_SCCR_SATACM /* SATA controller clock mode */
+		(SCCR_SATACM << SCCR_SATACM_SHIFT) |
+#endif
+		0;
+	__be32 sccr_val =
+#ifdef CONFIG_SYS_SCCR_ENCCM /* Encryption clock mode */
+		(CONFIG_SYS_SCCR_ENCCM << SCCR_ENCCM_SHIFT) |
 #endif
+#ifdef CONFIG_SYS_SCCR_PCICM /* PCI & DMA clock mode */
+		(CONFIG_SYS_SCCR_PCICM << SCCR_PCICM_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_SCCR_TSECCM /* all TSEC's clock mode */
+		(CONFIG_SYS_SCCR_TSECCM << SCCR_TSECCM_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_SCCR_TSEC1CM /* TSEC1 clock mode */
+		(CONFIG_SYS_SCCR_TSEC1CM << SCCR_TSEC1CM_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_SCCR_TSEC2CM /* TSEC2 clock mode */
+		(CONFIG_SYS_SCCR_TSEC2CM << SCCR_TSEC2CM_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_SCCR_TSEC1ON /* TSEC1 clock switch */
+		(CONFIG_SYS_SCCR_TSEC1ON << SCCR_TSEC1ON_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_SCCR_TSEC2ON /* TSEC2 clock switch */
+		(CONFIG_SYS_SCCR_TSEC2ON << SCCR_TSEC2ON_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_SCCR_USBMPHCM /* USB MPH clock mode */
+		(CONFIG_SYS_SCCR_USBMPHCM << SCCR_USBMPHCM_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_SCCR_USBDRCM /* USB DR clock mode */
+		(CONFIG_SYS_SCCR_USBDRCM << SCCR_USBDRCM_SHIFT) |
+#endif
+#ifdef CONFIG_SYS_SCCR_SATACM /* SATA controller clock mode */
+		(CONFIG_SYS_SCCR_SATACM << SCCR_SATACM_SHIFT) |
+#endif
+		0;
+
+	/* Pointer is writable since we allocated a register for it */
+	gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
+
+	/* Clear initial global data */
+	memset ((void *) gd, 0, sizeof (gd_t));
+
+	/* system performance tweaking */
+	clrsetbits_be32(&im->arbiter.acr, acr_mask, acr_val);
+
+	clrsetbits_be32(&im->sysconf.spcr, spcr_mask, spcr_val);
+
+	clrsetbits_be32(&im->clk.sccr, sccr_mask, sccr_val);
 
 	/* RSR - Reset Status Register - clear all status (4.6.1.3) */
-	gd->reset_status = im->reset.rsr;
-	im->reset.rsr = ~(RSR_RES);
+	gd->reset_status = __raw_readl(&im->reset.rsr);
+	__raw_writel(~(RSR_RES), &im->reset.rsr);
 
 	/* AER - Arbiter Event Register - store status */
-	gd->arbiter_event_attributes = im->arbiter.aeatr;
-	gd->arbiter_event_address = im->arbiter.aeadr;
+	gd->arbiter_event_attributes = __raw_readl(&im->arbiter.aeatr);
+	gd->arbiter_event_address = __raw_readl(&im->arbiter.aeadr);
 
 	/*
 	 * RMR - Reset Mode Register
 	 * contains checkstop reset enable (4.6.1.4)
 	 */
-	im->reset.rmr = (RMR_CSRE & (1<<RMR_CSRE_SHIFT));
-
-	/* LCRR - Clock Ratio Register (10.3.1.16) */
-	im->lbus.lcrr = CONFIG_SYS_LCRR;
+	__raw_writel(RMR_CSRE & (1<<RMR_CSRE_SHIFT), &im->reset.rmr);
 
-	/* Enable Time Base & Decrimenter ( so we will have udelay() )*/
-	im->sysconf.spcr |= SPCR_TBEN;
+	/* Enable Time Base & Decrementer ( so we will have udelay() )*/
+	setbits_be32(&im->sysconf.spcr, SPCR_TBEN);
 
 	/* System General Purpose Register */
 #ifdef CONFIG_SYS_SICRH
 #if defined(CONFIG_MPC834x) || defined(CONFIG_MPC8313)
 	/* regarding to MPC34x manual rev.1 bits 28..29 must be preserved */
-	im->sysconf.sicrh = (im->sysconf.sicrh & 0x0000000C) | CONFIG_SYS_SICRH;
+	__raw_writel((im->sysconf.sicrh & 0x0000000C) | CONFIG_SYS_SICRH,
+		     &im->sysconf.sicrh);
 #else
-	im->sysconf.sicrh = CONFIG_SYS_SICRH;
+	__raw_writel(CONFIG_SYS_SICRH, &im->sysconf.sicrh);
 #endif
 #endif
 #ifdef CONFIG_SYS_SICRL
-	im->sysconf.sicrl = CONFIG_SYS_SICRL;
+	__raw_writel(CONFIG_SYS_SICRL, &im->sysconf.sicrl);
 #endif
-	/* DDR control driver register */
-#ifdef CONFIG_SYS_DDRCDR
-	im->sysconf.ddrcdr = CONFIG_SYS_DDRCDR;
+#ifdef CONFIG_SYS_DDRCDR /* DDR control driver register */
+	__raw_writel(CONFIG_SYS_DDRCDR, &im->sysconf.ddrcdr);
 #endif
-	/* Output buffer impedance register */
-#ifdef CONFIG_SYS_OBIR
-	im->sysconf.obir = CONFIG_SYS_OBIR;
+#ifdef CONFIG_SYS_OBIR /* Output buffer impedance register */
+	__raw_writel(CONFIG_SYS_OBIR, &im->sysconf.obir);
 #endif
 
 #ifdef CONFIG_QE
@@ -308,7 +322,7 @@ void cpu_init_f (volatile immap_t * im)
 
 	/* Wait for clock to stabilize */
 	do {
-		temp = in_be32(&ehci->control);
+		temp = __raw_readl(&ehci->control);
 		udelay(1000);
 	} while (!(temp & PHY_CLK_VALID));
 #endif
@@ -317,8 +331,41 @@ void cpu_init_f (volatile immap_t * im)
 
 int cpu_init_r (void)
 {
+	volatile immap_t *im = (volatile immap_t *)CONFIG_SYS_IMMR;
 #ifdef CONFIG_QE
 	uint qe_base = CONFIG_SYS_IMMR + 0x00100000; /* QE immr base */
+#endif
+	__be32 lcrr_mask =
+#ifdef CONFIG_SYS_LCRR_DBYP /* PLL bypass */
+		LCRR_DBYP |
+#endif
+#ifdef CONFIG_SYS_LCRR_EADC /* external address delay */
+		LCRR_EADC |
+#endif
+#ifdef CONFIG_SYS_LCRR_CLKDIV /* system clock divider */
+		LCRR_CLKDIV |
+#endif
+		0;
+	__be32 lcrr_val =
+#ifdef CONFIG_SYS_LCRR_DBYP /* PLL bypass */
+		CONFIG_SYS_LCRR_DBYP |
+#endif
+#ifdef CONFIG_SYS_LCRR_EADC
+		CONFIG_SYS_LCRR_EADC |
+#endif
+#ifdef CONFIG_SYS_LCRR_CLKDIV /* system clock divider */
+		CONFIG_SYS_LCRR_CLKDIV |
+#endif
+		0;
+
+	/* LCRR - Clock Ratio Register (10.3.1.16)
+	 * write, read, and isync per MPC8379ERM rev.1 CLKDEV field description
+	 */
+	clrsetbits_be32(&im->lbus.lcrr, lcrr_mask, lcrr_val);
+	__raw_readl(&im->lbus.lcrr);
+	isync();
+
+#ifdef CONFIG_QE
 	qe_init(qe_base);
 	qe_reset();
 #endif