From e5d8d54db25790524da34b0143f4e0176fb7677b Mon Sep 17 00:00:00 2001 From: Scott Wood Date: Tue, 21 Aug 2007 03:40:02 +1000 Subject: [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 Acked-by: David Gibson Signed-off-by: Paul Mackerras --- arch/powerpc/boot/cuboot-pq2.c | 283 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 283 insertions(+) create mode 100644 arch/powerpc/boot/cuboot-pq2.c (limited to 'arch/powerpc/boot/cuboot-pq2.c') diff --git a/arch/powerpc/boot/cuboot-pq2.c b/arch/powerpc/boot/cuboot-pq2.c new file mode 100644 index 000000000000..8021fd4a43bc --- /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 + * + * 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; +} -- cgit v1.2.2 From 6d817aa71fddea859ba02d1a0b326da930ce6b50 Mon Sep 17 00:00:00 2001 From: Scott Wood Date: Wed, 29 Aug 2007 15:08:40 -0500 Subject: [POWERPC] CPM: Change from fsl,brg-frequency to brg/clock-frequency As suggested by David Gibson, now that we have a separate node for the baud rate generators, it's better to use the standard clock-frequency property than a cpm-node-level fsl,brg-frequency property. This patch updates existing places where fsl,brg-frequency is used. Signed-off-by: Scott Wood Signed-off-by: Kumar Gala --- arch/powerpc/boot/cuboot-pq2.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'arch/powerpc/boot/cuboot-pq2.c') diff --git a/arch/powerpc/boot/cuboot-pq2.c b/arch/powerpc/boot/cuboot-pq2.c index 8021fd4a43bc..b150bd4f1b73 100644 --- a/arch/powerpc/boot/cuboot-pq2.c +++ b/arch/powerpc/boot/cuboot-pq2.c @@ -264,10 +264,12 @@ static void pq2_platform_fixups(void) dt_fixup_cpu_clocks(bd.bi_intfreq, bd.bi_busfreq / 4, bd.bi_busfreq); node = finddevice("/soc/cpm"); - if (node) { + if (node) setprop(node, "clock-frequency", &bd.bi_cpmfreq, 4); - setprop(node, "fsl,brg-frequency", &bd.bi_brgfreq, 4); - } + + node = finddevice("/soc/cpm/brg"); + if (node) + setprop(node, "clock-frequency", &bd.bi_brgfreq, 4); update_cs_ranges(); fixup_pci(); -- cgit v1.2.2 From 568091512d464b06f17b88bfd2bdc1ec98a697bd Mon Sep 17 00:00:00 2001 From: Scott Wood Date: Thu, 30 Aug 2007 12:06:21 -0500 Subject: [POWERPC] bootwrapper: Support all-in-one PCI nodes in cuboot-pq2. Consensus was reached to put PCI nodes at the root of the tree (and not under /soc), but the phandle to a control node was rejected in favor of simply not worrying about /pci/reg overlapping /soc/ranges. This updates cuboot-82xx to not look for the phandle. Signed-off-by: Scott Wood Acked-by: David Gibson Signed-off-by: Kumar Gala --- arch/powerpc/boot/cuboot-pq2.c | 25 ++++++++----------------- 1 file changed, 8 insertions(+), 17 deletions(-) (limited to 'arch/powerpc/boot/cuboot-pq2.c') diff --git a/arch/powerpc/boot/cuboot-pq2.c b/arch/powerpc/boot/cuboot-pq2.c index b150bd4f1b73..d3d3388d552f 100644 --- a/arch/powerpc/boot/cuboot-pq2.c +++ b/arch/powerpc/boot/cuboot-pq2.c @@ -139,11 +139,11 @@ static void fixup_pci(void) 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; + void *node, *parent_node, *soc_node; + u32 naddr, nsize, mem_log2; - ctrl_node = finddevice("/soc/pci"); - if (!ctrl_node || !dt_is_compatible(ctrl_node, "fsl,pq2-pci")) + node = finddevice("/pci"); + if (!node || !dt_is_compatible(node, "fsl,pq2-pci")) return; soc_node = finddevice("/soc"); @@ -151,27 +151,18 @@ static void fixup_pci(void) goto err; for (i = 0; i < 3; i++) - if (!dt_xlate_reg(ctrl_node, i, + if (!dt_xlate_reg(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); + dt_get_reg_format(node, &naddr, &nsize); if (naddr != 3 || nsize != 2) goto err; - parent_node = get_parent(bus_node); + parent_node = get_parent(node); if (!parent_node) goto err; @@ -179,7 +170,7 @@ static void fixup_pci(void) if (naddr != 1 || nsize != 1) goto err; - len = getprop(bus_node, "ranges", pci_ranges_buf, + len = getprop(node, "ranges", pci_ranges_buf, sizeof(pci_ranges_buf)); for (i = 0; i < len / sizeof(struct pci_range); i++) { -- cgit v1.2.2 From a94b89a4813bddf85c052f8d04021688c5dfe0d7 Mon Sep 17 00:00:00 2001 From: Scott Wood Date: Fri, 31 Aug 2007 17:18:28 -0500 Subject: [POWERPC] bootwrapper: Use fsl_get_immr() in cuboot-pq2.c. Signed-off-by: Scott Wood Signed-off-by: Kumar Gala --- arch/powerpc/boot/cuboot-pq2.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) (limited to 'arch/powerpc/boot/cuboot-pq2.c') diff --git a/arch/powerpc/boot/cuboot-pq2.c b/arch/powerpc/boot/cuboot-pq2.c index d3d3388d552f..470ffacb8373 100644 --- a/arch/powerpc/boot/cuboot-pq2.c +++ b/arch/powerpc/boot/cuboot-pq2.c @@ -15,6 +15,7 @@ #include "stdio.h" #include "cuboot.h" #include "io.h" +#include "fsl-soc.h" #define TARGET_CPM2 #define TARGET_HAS_ETH1 @@ -139,23 +140,20 @@ static void fixup_pci(void) u32 *pci_regs[3]; u8 *soc_regs; int i, len; - void *node, *parent_node, *soc_node; + void *node, *parent_node; u32 naddr, nsize, mem_log2; node = finddevice("/pci"); if (!node || !dt_is_compatible(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(node, i, (unsigned long *)&pci_regs[i], NULL)) goto err; - if (!dt_xlate_reg(soc_node, 0, (unsigned long *)&soc_regs, NULL)) + soc_regs = (u8 *)fsl_get_immr(); + if (!soc_regs) goto err; dt_get_reg_format(node, &naddr, &nsize); -- cgit v1.2.2 From 96fca1dea8f32e96668d55727d66416fdd67360b Mon Sep 17 00:00:00 2001 From: Scott Wood Date: Fri, 14 Sep 2007 13:24:02 -0500 Subject: [POWERPC] Document local bus nodes in the device tree, and update cuboot-pq2. The localbus node is used to describe devices that are connected via a chip select or similar mechanism. The advantages over placing the devices under the root node are that it can be probed without probing other random things under the root, and that the description of which chip select a given device uses can be used to set up mappings if the firmware failed to do so in a useful manner. cuboot-pq2 is updated to match the binding; previously, it called itself chipselect rather than localbus, and used phandle linkage between the actual bus node and the control node (the current agreement is to simply use the fully-qualified address of the control registers, and ignore the overlap with the IMMR node). Signed-off-by: Scott Wood Signed-off-by: Kumar Gala --- arch/powerpc/boot/cuboot-pq2.c | 29 ++++++++--------------------- 1 file changed, 8 insertions(+), 21 deletions(-) (limited to 'arch/powerpc/boot/cuboot-pq2.c') diff --git a/arch/powerpc/boot/cuboot-pq2.c b/arch/powerpc/boot/cuboot-pq2.c index 470ffacb8373..61574f3272dd 100644 --- a/arch/powerpc/boot/cuboot-pq2.c +++ b/arch/powerpc/boot/cuboot-pq2.c @@ -44,22 +44,21 @@ struct pci_range pci_ranges_buf[MAX_PROP_LEN / sizeof(struct pci_range)]; * 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. + * For any node defined as compatible with fsl,pq2-localbus, + * #address/#size must be 2/1 for the localbus, and 1/1 for the parent bus. + * Ranges must be for whole chip selects. */ static void update_cs_ranges(void) { - u32 ctrl_ph; - void *ctrl_node, *bus_node, *parent_node; + void *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")) + bus_node = finddevice("/localbus"); + if (!bus_node || !dt_is_compatible(bus_node, "fsl,pq2-localbus")) return; dt_get_reg_format(bus_node, &naddr, &nsize); @@ -74,19 +73,7 @@ static void update_cs_ranges(void) 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, + if (!dt_xlate_reg(bus_node, 0, (unsigned long *)&ctrl_addr, &ctrl_size)) goto err; @@ -123,7 +110,7 @@ static void update_cs_ranges(void) return; err: - printf("Bad /chipselect or fsl,pq2-chipselect-ctrl node\r\n"); + printf("Bad /localbus node\r\n"); } /* Older u-boots don't set PCI up properly. Update the hardware to match -- cgit v1.2.2