[U-Boot] [PATCH v3 2/7] ppc/p4080: Add support for CoreNet style platform LAWs

[Kumar Gala <galak@kernel.crashing.org>]

On CoreNet based platforms the LAW address is split between an high &
low register and we no longer shift the address.  Also, the target IDs
on CoreNet platforms have been completely re-assigned.

Additionally, added a new find_law() API to which LAW an address hits in.
This is need for the CoreNet style boot release code since it will need
to determine what the target ID should be set to for boot window
translation.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
* Updated based on LAWs being an array

 drivers/misc/fsl_law.c    |   94 ++++++++++++++++++++++++++++++++++++++++++++-
 include/asm-ppc/fsl_law.h |   31 +++++++++++++++
 2 files changed, 123 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/fsl_law.c b/drivers/misc/fsl_law.c
index aa877c6..cbca440 100644
--- a/drivers/misc/fsl_law.c
+++ b/drivers/misc/fsl_law.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2008 Freescale Semiconductor, Inc.
+ * Copyright 2008-2009 Freescale Semiconductor, Inc.
  *
  * (C) Copyright 2000
  * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
@@ -29,7 +29,6 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
-#define LAWAR_EN	0x80000000
 /* number of LAWs in the hw implementation */
 #if defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || \
     defined(CONFIG_MPC8560) || defined(CONFIG_MPC8555)
@@ -48,6 +47,20 @@ DECLARE_GLOBAL_DATA_PTR;
 
 void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
 {
+#ifdef CONFIG_FSL_CORENET
+	volatile ccsr_local_t *ccm = 
+		(void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR);
+
+	gd->used_laws |= (1 << idx);
+
+	out_be32(&ccm->law[idx].lawar, 0);
+	out_be32(&ccm->law[idx].lawbarh, ((u64)addr >> 32));
+	out_be32(&ccm->law[idx].lawbarl, addr & 0xffffffff);
+	out_be32(&ccm->law[idx].lawar, LAWAR_EN | ((u32)id << 20) | (u32)sz);
+
+	/* Read back so that we sync the writes */
+	in_be32(&ccm->law[idx].lawar);
+#else
 	volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
 	volatile u32 *lawbar = base + 8 * idx;
 	volatile u32 *lawar = base + 8 * idx + 2;
@@ -60,6 +73,7 @@ void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
 
 	/* Read back so that we sync the writes */
 	in_be32(lawar);
+#endif
 }
 
 int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
@@ -96,6 +110,19 @@ int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id)
 
 void disable_law(u8 idx)
 {
+#ifdef CONFIG_FSL_CORENET
+	volatile ccsr_local_t *ccm =
+		(void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR);
+
+	gd->used_laws &= ~(1 << idx);
+
+	out_be32(&ccm->law[idx].lawar, 0);
+	out_be32(&ccm->law[idx].lawbarh, 0);
+	out_be32(&ccm->law[idx].lawbarl, 0);
+
+	/* Read back so that we sync the writes */
+	in_be32(&ccm->law[idx].lawar);
+#else
 	volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
 	volatile u32 *lawbar = base + 8 * idx;
 	volatile u32 *lawar = base + 8 * idx + 2;
@@ -105,9 +132,66 @@ void disable_law(u8 idx)
 	out_be32(lawar, 0);
 	out_be32(lawbar, 0);
 
+	/* Read back so that we sync the writes */
+	in_be32(lawar);
+#endif
+
 	return;
 }
 
+#ifdef CONFIG_FSL_CORENET
+#define GET_LAW_ADDR ((u64)in_be32(lawbarh) << 32) | in_be32(lawbarl)
+#else
+#define GET_LAW_ADDR ((u64)in_be32(lawbar) << 12)
+#endif
+
+struct law_entry find_law(phys_addr_t addr)
+{
+	struct law_entry entry;
+	int i;
+
+	entry.index = -1;
+	entry.addr = 0;
+	entry.size = 0;
+	entry.trgt_id = 0;
+
+	for(i = 0; i < FSL_HW_NUM_LAWS; i++) {
+
+		u64 upper;
+		u32 temp;
+#ifdef CONFIG_FSL_CORENET
+		volatile ccsr_local_t *ccm;
+		volatile u32 *lawbarh, *lawbarl, *lawar;
+
+		ccm = (void *)(CONFIG_SYS_FSL_CORENET_CCM_ADDR);
+
+		lawbarh = &ccm->law[i].lawbarh;
+		lawbarl = &ccm->law[i].lawbarl;
+		lawar = &ccm->law[i].lawar;
+#else
+		volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
+		volatile u32 *lawbar = base + 8 * i;
+		volatile u32 *lawar = base + 8 * i + 2;
+#endif
+		temp = in_be32(lawar);
+
+		if (!(temp & LAWAR_EN))
+			continue;
+
+		entry.addr = GET_LAW_ADDR;
+		entry.size = temp & 0x3f;
+		entry.trgt_id = (temp >> 20) & 0xff;
+
+		upper = entry.addr + (2ull << entry.size);
+		if ((addr >= entry.addr) && (addr < upper)) {
+			entry.index = i;
+			break;
+		}
+	}
+
+	return entry;
+}
+
 void print_laws(void)
 {
 	volatile u32 *base = (volatile u32 *)(CONFIG_SYS_IMMR + 0xc08);
@@ -173,7 +257,13 @@ void init_laws(void)
 {
 	int i;
 
+#if FSL_HW_NUM_LAWS < 32
 	gd->used_laws = ~((1 << FSL_HW_NUM_LAWS) - 1);
+#elif FSL_HW_NUM_LAWS == 32
+	gd->used_laws = 0;
+#else
+#error FSL_HW_NUM_LAWS can not be greater than 32 w/o code changes
+#endif
 
 	for (i = 0; i < num_law_entries; i++) {
 		if (law_table[i].index == -1)
diff --git a/include/asm-ppc/fsl_law.h b/include/asm-ppc/fsl_law.h
index e06a1a6..f06ede9 100644
--- a/include/asm-ppc/fsl_law.h
+++ b/include/asm-ppc/fsl_law.h
@@ -1,8 +1,18 @@
+/*
+ * Copyright 2008-2009 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * Version 2 as published by the Free Software Foundation.
+ */
+
 #ifndef _FSL_LAW_H_
 #define _FSL_LAW_H_
 
 #include <asm/io.h>
 
+#define LAWAR_EN	0x80000000
+
 #define SET_LAW_ENTRY(idx, a, sz, trgt) \
 	{ .index = idx, .addr = a, .size = sz, .trgt_id = trgt }
 
@@ -36,6 +46,25 @@ enum law_size {
 	LAW_SIZE_32G,
 };
 
+#ifdef CONFIG_FSL_CORENET
+enum law_trgt_if {
+	LAW_TRGT_IF_PCIE_1 = 0x00,
+	LAW_TRGT_IF_PCIE_2 = 0x01,
+	LAW_TRGT_IF_PCIE_3 = 0x02,
+	LAW_TRGT_IF_RIO_1 = 0x08,
+	LAW_TRGT_IF_RIO_2 = 0x09,
+
+	LAW_TRGT_IF_DDR_1 = 0x10,
+	LAW_TRGT_IF_DDR_2 = 0x11,	/* 2nd controller */
+	LAW_TRGT_IF_DDR_INTRLV = 0x14,
+
+	LAW_TRGT_IF_BMAN = 0x18,
+	LAW_TRGT_IF_DCSR = 0x1d,
+	LAW_TRGT_IF_LBC = 0x1f,
+	LAW_TRGT_IF_QMAN = 0x3c,
+};
+#define LAW_TRGT_IF_DDR		LAW_TRGT_IF_DDR_1
+#else
 enum law_trgt_if {
 	LAW_TRGT_IF_PCI = 0x00,
 	LAW_TRGT_IF_PCI_2 = 0x01,
@@ -64,6 +93,7 @@ enum law_trgt_if {
 #if defined(CONFIG_MPC8572) || defined(CONFIG_P2020)
 #define LAW_TRGT_IF_PCIE_3	LAW_TRGT_IF_PCI
 #endif
+#endif /* CONFIG_FSL_CORENET */
 
 struct law_entry {
 	int index;
@@ -76,6 +106,7 @@ extern void set_law(u8 idx, phys_addr_t addr, enum law_size sz, enum law_trgt_if
 extern int set_next_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id);
 extern int set_last_law(phys_addr_t addr, enum law_size sz, enum law_trgt_if id);
 extern int set_ddr_laws(u64 start, u64 sz, enum law_trgt_if id);
+extern struct law_entry find_law(phys_addr_t addr);
 extern void disable_law(u8 idx);
 extern void init_laws(void);
 extern void print_laws(void);
-- 
1.6.0.6