[POWERPC] bootwrapper: Add PowerQUICC II (82xx with CPM) cuboot support
This allows booting on legacy, non-device-tree aware versions of U-boot.
It also fixes up the hardware to match the PCI and chipselect information
in the device tree, as u-boot is inconsistent in setting these up
correctly (or at all).
Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 6b9af78..cd7c057 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -48,7 +48,7 @@
cpm-serial.c
src-plat := of.c cuboot-83xx.c cuboot-85xx.c holly.c \
cuboot-ebony.c treeboot-ebony.c prpmc2800.c \
- ps3-head.S ps3-hvcall.S ps3.c treeboot-bamboo.c cuboot-8xx.c
+ ps3-head.S ps3-hvcall.S ps3.c treeboot-bamboo.c cuboot-8xx.c cuboot-pq2.c
src-boot := $(src-wlib) $(src-plat) empty.c
src-boot := $(addprefix $(obj)/, $(src-boot))
@@ -141,6 +141,7 @@
ifneq ($(CONFIG_DEVICE_TREE),"")
image-$(CONFIG_PPC_8xx) += cuImage.8xx
+image-$(CONFIG_8260) += cuImage.pq2
image-$(CONFIG_PPC_83xx) += cuImage.83xx
image-$(CONFIG_PPC_85xx) += cuImage.85xx
image-$(CONFIG_EBONY) += treeImage.ebony cuImage.ebony
diff --git a/arch/powerpc/boot/cuboot-pq2.c b/arch/powerpc/boot/cuboot-pq2.c
new file mode 100644
index 0000000..8021fd4
--- /dev/null
+++ b/arch/powerpc/boot/cuboot-pq2.c
@@ -0,0 +1,283 @@
+/*
+ * Old U-boot compatibility for PowerQUICC II
+ * (a.k.a. 82xx with CPM, not the 8240 family of chips)
+ *
+ * Author: Scott Wood <scottwood@freescale.com>
+ *
+ * Copyright (c) 2007 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.
+ */
+
+#include "ops.h"
+#include "stdio.h"
+#include "cuboot.h"
+#include "io.h"
+
+#define TARGET_CPM2
+#define TARGET_HAS_ETH1
+#include "ppcboot.h"
+
+static bd_t bd;
+
+struct cs_range {
+ u32 csnum;
+ u32 base; /* must be zero */
+ u32 addr;
+ u32 size;
+};
+
+struct pci_range {
+ u32 flags;
+ u32 pci_addr[2];
+ u32 phys_addr;
+ u32 size[2];
+};
+
+struct cs_range cs_ranges_buf[MAX_PROP_LEN / sizeof(struct cs_range)];
+struct pci_range pci_ranges_buf[MAX_PROP_LEN / sizeof(struct pci_range)];
+
+/* Different versions of u-boot put the BCSR in different places, and
+ * some don't set up the PCI PIC at all, so we assume the device tree is
+ * sane and update the BRx registers appropriately.
+ *
+ * For any node defined as compatible with fsl,pq2-chipselect,
+ * #address/#size must be 2/1 for chipselect bus, 1/1 for parent bus,
+ * and ranges must be for whole chip selects.
+ */
+static void update_cs_ranges(void)
+{
+ u32 ctrl_ph;
+ void *ctrl_node, *bus_node, *parent_node;
+ u32 *ctrl_addr;
+ unsigned long ctrl_size;
+ u32 naddr, nsize;
+ int len;
+ int i;
+
+ bus_node = finddevice("/chipselect");
+ if (!bus_node || !dt_is_compatible(bus_node, "fsl,pq2-chipselect"))
+ return;
+
+ dt_get_reg_format(bus_node, &naddr, &nsize);
+ if (naddr != 2 || nsize != 1)
+ goto err;
+
+ parent_node = get_parent(bus_node);
+ if (!parent_node)
+ goto err;
+
+ dt_get_reg_format(parent_node, &naddr, &nsize);
+ if (naddr != 1 || nsize != 1)
+ goto err;
+
+ len = getprop(bus_node, "fsl,ctrl", &ctrl_ph, 4);
+ if (len != 4)
+ goto err;
+
+ ctrl_node = find_node_by_prop_value(NULL, "linux,phandle",
+ (char *)&ctrl_ph, 4);
+ if (!ctrl_node)
+ goto err;
+
+ if (!dt_is_compatible(ctrl_node, "fsl,pq2-chipselect-ctrl"))
+ goto err;
+
+ if (!dt_xlate_reg(ctrl_node, 0, (unsigned long *)&ctrl_addr,
+ &ctrl_size))
+ goto err;
+
+ len = getprop(bus_node, "ranges", cs_ranges_buf, sizeof(cs_ranges_buf));
+
+ for (i = 0; i < len / sizeof(struct cs_range); i++) {
+ u32 base, option;
+ int cs = cs_ranges_buf[i].csnum;
+ if (cs >= ctrl_size / 8)
+ goto err;
+
+ if (cs_ranges_buf[i].base != 0)
+ goto err;
+
+ base = in_be32(&ctrl_addr[cs * 2]);
+
+ /* If CS is already valid, use the existing flags.
+ * Otherwise, guess a sane default.
+ */
+ if (base & 1) {
+ base &= 0x7fff;
+ option = in_be32(&ctrl_addr[cs * 2 + 1]) & 0x7fff;
+ } else {
+ base = 0x1801;
+ option = 0x10;
+ }
+
+ out_be32(&ctrl_addr[cs * 2], 0);
+ out_be32(&ctrl_addr[cs * 2 + 1],
+ option | ~(cs_ranges_buf[i].size - 1));
+ out_be32(&ctrl_addr[cs * 2], base | cs_ranges_buf[i].addr);
+ }
+
+ return;
+
+err:
+ printf("Bad /chipselect or fsl,pq2-chipselect-ctrl node\r\n");
+}
+
+/* Older u-boots don't set PCI up properly. Update the hardware to match
+ * the device tree. The prefetch mem region and non-prefetch mem region
+ * must be contiguous in the host bus. As required by the PCI binding,
+ * PCI #addr/#size must be 3/2. The parent bus must be 1/1. Only
+ * 32-bit PCI is supported. All three region types (prefetchable mem,
+ * non-prefetchable mem, and I/O) must be present.
+ */
+static void fixup_pci(void)
+{
+ struct pci_range *mem = NULL, *mmio = NULL,
+ *io = NULL, *mem_base = NULL;
+ u32 *pci_regs[3];
+ u8 *soc_regs;
+ int i, len;
+ void *ctrl_node, *bus_node, *parent_node, *soc_node;
+ u32 naddr, nsize, bus_ph, mem_log2;
+
+ ctrl_node = finddevice("/soc/pci");
+ if (!ctrl_node || !dt_is_compatible(ctrl_node, "fsl,pq2-pci"))
+ return;
+
+ soc_node = finddevice("/soc");
+ if (!soc_node || !dt_is_compatible(soc_node, "fsl,pq2-soc"))
+ goto err;
+
+ for (i = 0; i < 3; i++)
+ if (!dt_xlate_reg(ctrl_node, i,
+ (unsigned long *)&pci_regs[i], NULL))
+ goto err;
+
+ if (!dt_xlate_reg(soc_node, 0, (unsigned long *)&soc_regs, NULL))
+ goto err;
+
+ len = getprop(ctrl_node, "fsl,bus", &bus_ph, 4);
+ if (len != 4)
+ goto err;
+
+ bus_node = find_node_by_prop_value(NULL, "linux,phandle",
+ (char *)&bus_ph, 4);
+ if (!bus_node)
+ goto err;
+
+ dt_get_reg_format(bus_node, &naddr, &nsize);
+ if (naddr != 3 || nsize != 2)
+ goto err;
+
+ parent_node = get_parent(bus_node);
+ if (!parent_node)
+ goto err;
+
+ dt_get_reg_format(parent_node, &naddr, &nsize);
+ if (naddr != 1 || nsize != 1)
+ goto err;
+
+ len = getprop(bus_node, "ranges", pci_ranges_buf,
+ sizeof(pci_ranges_buf));
+
+ for (i = 0; i < len / sizeof(struct pci_range); i++) {
+ u32 flags = pci_ranges_buf[i].flags & 0x43000000;
+
+ if (flags == 0x42000000)
+ mem = &pci_ranges_buf[i];
+ else if (flags == 0x02000000)
+ mmio = &pci_ranges_buf[i];
+ else if (flags == 0x01000000)
+ io = &pci_ranges_buf[i];
+ }
+
+ if (!mem || !mmio || !io)
+ goto err;
+
+ if (mem->phys_addr + mem->size[1] == mmio->phys_addr)
+ mem_base = mem;
+ else if (mmio->phys_addr + mmio->size[1] == mem->phys_addr)
+ mem_base = mmio;
+ else
+ goto err;
+
+ out_be32(&pci_regs[1][0], mem_base->phys_addr | 1);
+ out_be32(&pci_regs[2][0], ~(mem->size[1] + mmio->size[1] - 1));
+
+ out_be32(&pci_regs[1][1], io->phys_addr | 1);
+ out_be32(&pci_regs[2][1], ~(io->size[1] - 1));
+
+ out_le32(&pci_regs[0][0], mem->pci_addr[1] >> 12);
+ out_le32(&pci_regs[0][2], mem->phys_addr >> 12);
+ out_le32(&pci_regs[0][4], (~(mem->size[1] - 1) >> 12) | 0xa0000000);
+
+ out_le32(&pci_regs[0][6], mmio->pci_addr[1] >> 12);
+ out_le32(&pci_regs[0][8], mmio->phys_addr >> 12);
+ out_le32(&pci_regs[0][10], (~(mmio->size[1] - 1) >> 12) | 0x80000000);
+
+ out_le32(&pci_regs[0][12], io->pci_addr[1] >> 12);
+ out_le32(&pci_regs[0][14], io->phys_addr >> 12);
+ out_le32(&pci_regs[0][16], (~(io->size[1] - 1) >> 12) | 0xc0000000);
+
+ /* Inbound translation */
+ out_le32(&pci_regs[0][58], 0);
+ out_le32(&pci_regs[0][60], 0);
+
+ mem_log2 = 1 << (__ilog2_u32(bd.bi_memsize - 1) + 1);
+ out_le32(&pci_regs[0][62], 0xa0000000 | ~((1 << (mem_log2 - 12)) - 1));
+
+ /* If PCI is disabled, drive RST high to enable. */
+ if (!(in_le32(&pci_regs[0][32]) & 1)) {
+ /* Tpvrh (Power valid to RST# high) 100 ms */
+ udelay(100000);
+
+ out_le32(&pci_regs[0][32], 1);
+
+ /* Trhfa (RST# high to first cfg access) 2^25 clocks */
+ udelay(1020000);
+ }
+
+ /* Enable bus master and memory access */
+ out_le32(&pci_regs[0][64], 0x80000004);
+ out_le32(&pci_regs[0][65], in_le32(&pci_regs[0][65]) | 6);
+
+ /* Park the bus on PCI, and elevate PCI's arbitration priority,
+ * as required by section 9.6 of the user's manual.
+ */
+ out_8(&soc_regs[0x10028], 3);
+ out_be32((u32 *)&soc_regs[0x1002c], 0x01236745);
+
+ return;
+
+err:
+ printf("Bad PCI node\r\n");
+}
+
+static void pq2_platform_fixups(void)
+{
+ void *node;
+
+ dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
+ dt_fixup_mac_addresses(bd.bi_enetaddr, bd.bi_enet1addr);
+ dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq);
+
+ node = finddevice("/soc/cpm");
+ if (node) {
+ setprop(node, "clock-frequency", &bd.bi_cpmfreq, 4);
+ setprop(node, "fsl,brg-frequency", &bd.bi_brgfreq, 4);
+ }
+
+ update_cs_ranges();
+ fixup_pci();
+}
+
+void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+ unsigned long r6, unsigned long r7)
+{
+ CUBOOT_INIT();
+ ft_init(_dtb_start, _dtb_end - _dtb_start, 32);
+ serial_console_init();
+ platform_ops.fixups = pq2_platform_fixups;
+}
diff --git a/arch/powerpc/boot/devtree.c b/arch/powerpc/boot/devtree.c
index 3a18bfe..e1b8122 100644
--- a/arch/powerpc/boot/devtree.c
+++ b/arch/powerpc/boot/devtree.c
@@ -114,7 +114,7 @@
#define MAX_ADDR_CELLS 4
-static void get_reg_format(void *node, u32 *naddr, u32 *nsize)
+void dt_get_reg_format(void *node, u32 *naddr, u32 *nsize)
{
if (getprop(node, "#address-cells", naddr, 4) != 4)
*naddr = 2;
@@ -224,7 +224,7 @@
if (!parent)
return 0;
- get_reg_format(parent, &naddr, &nsize);
+ dt_get_reg_format(parent, &naddr, &nsize);
if (nsize > 2)
return 0;
@@ -252,7 +252,7 @@
if (!parent)
break;
- get_reg_format(parent, &naddr, &nsize);
+ dt_get_reg_format(parent, &naddr, &nsize);
buflen = getprop(node, "ranges", prop_buf,
sizeof(prop_buf));
diff --git a/arch/powerpc/boot/ops.h b/arch/powerpc/boot/ops.h
index e4b6139..45c2268 100644
--- a/arch/powerpc/boot/ops.h
+++ b/arch/powerpc/boot/ops.h
@@ -89,6 +89,7 @@
int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size);
int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr);
int dt_is_compatible(void *node, const char *compat);
+void dt_get_reg_format(void *node, u32 *naddr, u32 *nsize);
static inline void *finddevice(const char *name)
{
@@ -206,4 +207,12 @@
extern char _dtb_start[];
extern char _dtb_end[];
+static inline __attribute__((const))
+int __ilog2_u32(u32 n)
+{
+ int bit;
+ asm ("cntlzw %0,%1" : "=r" (bit) : "r" (n));
+ return 31 - bit;
+}
+
#endif /* _PPC_BOOT_OPS_H_ */
