[POWERPC] ppc: Add support for AMCC Taishan 440GX eval board

This patch adds support for the AMCC Taishan PPC440GX evaluation
board.

This is still an arch/ppc port. I'm aware that the move of
4xx to arch/powerpc is making good progress right now. So this
patch is mainly intended to make the Taishan support available
for the community right now.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>

4 files changed, 471 insertions, 2 deletions

diff --git a/arch/ppc/platforms/4xx/Kconfig b/arch/ppc/platforms/4xx/Kconfig
index 6980de420e92..705ae56016f0 100644
--- a/arch/ppc/platforms/4xx/Kconfig
+++ b/arch/ppc/platforms/4xx/Kconfig
@@ -98,6 +98,12 @@ config OCOTEA
         help
           This option enables support for the IBM PPC440GX evaluation board.
 
+config TAISHAN
+        bool "Taishan"
+        select WANT_EARLY_SERIAL
+        help
+          This option enables support for the AMCC PPC440GX evaluation board.
+
 endchoice
 
 config EP405PC
@@ -126,7 +132,7 @@ config 440GP
 
 config 440GX
         bool
-        depends on OCOTEA
+        depends on OCOTEA || TAISHAN
         default y
 
 config 440SP
@@ -173,7 +179,7 @@ config BOOKE
 
 config IBM_OCP
         bool
-        depends on ASH || BAMBOO || BUBINGA || CPCI405 || EBONY || EP405 || LUAN || YUCCA || OCOTEA || REDWOOD_5 || REDWOOD_6 || SYCAMORE || WALNUT
+        depends on ASH || BAMBOO || BUBINGA || CPCI405 || EBONY || EP405 || LUAN || YUCCA || OCOTEA || REDWOOD_5 || REDWOOD_6 || SYCAMORE || TAISHAN || WALNUT
         default y
 
 config IBM_EMAC4
diff --git a/arch/ppc/platforms/4xx/Makefile b/arch/ppc/platforms/4xx/Makefile
index a04a0d0a0f5c..fa6610bccaf9 100644
--- a/arch/ppc/platforms/4xx/Makefile
+++ b/arch/ppc/platforms/4xx/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_OCOTEA)		+= ocotea.o
 obj-$(CONFIG_REDWOOD_5)         += redwood5.o
 obj-$(CONFIG_REDWOOD_6)         += redwood6.o
 obj-$(CONFIG_SYCAMORE)          += sycamore.o
+obj-$(CONFIG_TAISHAN)           += taishan.o
 obj-$(CONFIG_WALNUT)            += walnut.o
 obj-$(CONFIG_XILINX_ML300)      += xilinx_ml300.o
 obj-$(CONFIG_XILINX_ML403)      += xilinx_ml403.o
diff --git a/arch/ppc/platforms/4xx/taishan.c b/arch/ppc/platforms/4xx/taishan.c
new file mode 100644
index 000000000000..bb0253eef45a
--- /dev/null
+++ b/arch/ppc/platforms/4xx/taishan.c
@@ -0,0 +1,395 @@
+/*
+ * arch/ppc/platforms/4xx/taishan.c
+ *
+ * AMCC Taishan board specific routines
+ *
+ * Copyright 2007 DENX Software Engineering, Stefan Roese <sr@denx.de>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/reboot.h>
+#include <linux/pci.h>
+#include <linux/kdev_t.h>
+#include <linux/types.h>
+#include <linux/major.h>
+#include <linux/blkdev.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/initrd.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/tty.h>
+#include <linux/serial.h>
+#include <linux/serial_core.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/ndfc.h>
+#include <linux/mtd/physmap.h>
+
+#include <asm/machdep.h>
+#include <asm/ocp.h>
+#include <asm/bootinfo.h>
+#include <asm/ppcboot.h>
+
+#include <syslib/gen550.h>
+#include <syslib/ibm440gx_common.h>
+
+extern bd_t __res;
+
+static struct ibm44x_clocks clocks __initdata;
+
+/*
+ * NOR FLASH configuration (using mtd physmap driver)
+ */
+
+/* start will be added dynamically, end is always fixed */
+static struct resource taishan_nor_resource = {
+        .start = TAISHAN_FLASH_ADDR,
+        .end   = 0x1ffffffffULL,
+        .flags = IORESOURCE_MEM,
+};
+
+#define RW_PART0_OF     0
+#define RW_PART0_SZ     0x180000
+#define RW_PART1_SZ     0x200000
+/* Partition 2 will be autosized dynamically... */
+#define RW_PART3_SZ     0x80000
+#define RW_PART4_SZ     0x40000
+
+static struct mtd_partition taishan_nor_parts[] = {
+        {
+                .name = "kernel",
+                .offset = 0,
+                .size = RW_PART0_SZ
+        },
+        {
+                .name = "root",
+                .offset = MTDPART_OFS_APPEND,
+                .size = RW_PART1_SZ,
+        },
+        {
+                .name = "user",
+                .offset = MTDPART_OFS_APPEND,
+/*              .size = RW_PART2_SZ */ /* will be adjusted dynamically */
+        },
+        {
+                .name = "env",
+                .offset = MTDPART_OFS_APPEND,
+                .size = RW_PART3_SZ,
+        },
+        {
+                .name = "u-boot",
+                .offset = MTDPART_OFS_APPEND,
+                .size = RW_PART4_SZ,
+        }
+};
+
+static struct physmap_flash_data taishan_nor_data = {
+        .width          = 4,
+        .parts          = taishan_nor_parts,
+        .nr_parts       = ARRAY_SIZE(taishan_nor_parts),
+};
+
+static struct platform_device taishan_nor_device = {
+        .name           = "physmap-flash",
+        .id             = 0,
+        .dev = {
+                        .platform_data = &taishan_nor_data,
+                },
+        .num_resources  = 1,
+        .resource       = &taishan_nor_resource,
+};
+
+static int taishan_setup_flash(void)
+{
+        /*
+         * Adjust partition 2 to flash size
+         */
+        taishan_nor_parts[2].size = __res.bi_flashsize -
+                RW_PART0_SZ - RW_PART1_SZ - RW_PART3_SZ - RW_PART4_SZ;
+
+        platform_device_register(&taishan_nor_device);
+
+        return 0;
+}
+arch_initcall(taishan_setup_flash);
+
+static void __init
+taishan_calibrate_decr(void)
+{
+        unsigned int freq;
+
+        if (mfspr(SPRN_CCR1) & CCR1_TCS)
+                freq = TAISHAN_TMR_CLK;
+        else
+                freq = clocks.cpu;
+
+        ibm44x_calibrate_decr(freq);
+}
+
+static int
+taishan_show_cpuinfo(struct seq_file *m)
+{
+        seq_printf(m, "vendor\t\t: AMCC\n");
+        seq_printf(m, "machine\t\t: PPC440GX EVB (Taishan)\n");
+        ibm440gx_show_cpuinfo(m);
+        return 0;
+}
+
+static inline int
+taishan_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
+{
+        static char pci_irq_table[][4] =
+        /*
+         *      PCI IDSEL/INTPIN->INTLINE
+         *         A   B   C   D
+         */
+        {
+                { 23, 24, 25, 26 },     /* IDSEL 1 - PCI Slot 0 */
+                { 24, 25, 26, 23 },     /* IDSEL 2 - PCI Slot 1 */
+        };
+
+        const long min_idsel = 1, max_idsel = 2, irqs_per_slot = 4;
+        return PCI_IRQ_TABLE_LOOKUP;
+}
+
+static void __init taishan_set_emacdata(void)
+{
+        struct ocp_def *def;
+        struct ocp_func_emac_data *emacdata;
+        int i;
+
+        /* Set phy_map, phy_mode, and mac_addr for each EMAC */
+        for (i=2; i<4; i++) {
+                def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, i);
+                emacdata = def->additions;
+                if (i < 2) {
+                        emacdata->phy_map = 0x00000001; /* Skip 0x00 */
+                        emacdata->phy_mode = PHY_MODE_SMII;
+                } else {
+                        emacdata->phy_map = 0x00000001; /* Skip 0x00 */
+                        emacdata->phy_mode = PHY_MODE_RGMII;
+                }
+                if (i == 0)
+                        memcpy(emacdata->mac_addr, "\0\0\0\0\0\0", 6);
+                else if (i == 1)
+                        memcpy(emacdata->mac_addr, "\0\0\0\0\0\0", 6);
+                else if (i == 2)
+                        memcpy(emacdata->mac_addr, __res.bi_enetaddr, 6);
+                else if (i == 3)
+                        memcpy(emacdata->mac_addr, __res.bi_enet1addr, 6);
+        }
+}
+
+#define PCIX_READW(offset) \
+        (readw(pcix_reg_base+offset))
+
+#define PCIX_WRITEW(value, offset) \
+        (writew(value, pcix_reg_base+offset))
+
+#define PCIX_WRITEL(value, offset) \
+        (writel(value, pcix_reg_base+offset))
+
+/*
+ * FIXME: This is only here to "make it work".  This will move
+ * to a ibm_pcix.c which will contain a generic IBM PCIX bridge
+ * configuration library. -Matt
+ */
+static void __init
+taishan_setup_pcix(void)
+{
+        void *pcix_reg_base;
+
+        pcix_reg_base = ioremap64(PCIX0_REG_BASE, PCIX_REG_SIZE);
+
+        /* Enable PCIX0 I/O, Mem, and Busmaster cycles */
+        PCIX_WRITEW(PCIX_READW(PCIX0_COMMAND) | PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER, PCIX0_COMMAND);
+
+        /* Disable all windows */
+        PCIX_WRITEL(0, PCIX0_POM0SA);
+        PCIX_WRITEL(0, PCIX0_POM1SA);
+        PCIX_WRITEL(0, PCIX0_POM2SA);
+        PCIX_WRITEL(0, PCIX0_PIM0SA);
+        PCIX_WRITEL(0, PCIX0_PIM0SAH);
+        PCIX_WRITEL(0, PCIX0_PIM1SA);
+        PCIX_WRITEL(0, PCIX0_PIM2SA);
+        PCIX_WRITEL(0, PCIX0_PIM2SAH);
+
+        /* Setup 2GB PLB->PCI outbound mem window (3_8000_0000->0_8000_0000) */
+        PCIX_WRITEL(0x00000003, PCIX0_POM0LAH);
+        PCIX_WRITEL(0x80000000, PCIX0_POM0LAL);
+        PCIX_WRITEL(0x00000000, PCIX0_POM0PCIAH);
+        PCIX_WRITEL(0x80000000, PCIX0_POM0PCIAL);
+        PCIX_WRITEL(0x80000001, PCIX0_POM0SA);
+
+        /* Setup 2GB PCI->PLB inbound memory window at 0, enable MSIs */
+        PCIX_WRITEL(0x00000000, PCIX0_PIM0LAH);
+        PCIX_WRITEL(0x00000000, PCIX0_PIM0LAL);
+        PCIX_WRITEL(0xe0000007, PCIX0_PIM0SA);
+        PCIX_WRITEL(0xffffffff, PCIX0_PIM0SAH);
+
+        iounmap(pcix_reg_base);
+
+        eieio();
+}
+
+static void __init
+taishan_setup_hose(void)
+{
+        struct pci_controller *hose;
+
+        /* Configure windows on the PCI-X host bridge */
+        taishan_setup_pcix();
+
+        hose = pcibios_alloc_controller();
+
+        if (!hose)
+                return;
+
+        hose->first_busno = 0;
+        hose->last_busno = 0xff;
+
+        hose->pci_mem_offset = TAISHAN_PCI_MEM_OFFSET;
+
+        pci_init_resource(&hose->io_resource,
+                        TAISHAN_PCI_LOWER_IO,
+                        TAISHAN_PCI_UPPER_IO,
+                        IORESOURCE_IO,
+                        "PCI host bridge");
+
+        pci_init_resource(&hose->mem_resources[0],
+                        TAISHAN_PCI_LOWER_MEM,
+                        TAISHAN_PCI_UPPER_MEM,
+                        IORESOURCE_MEM,
+                        "PCI host bridge");
+
+        hose->io_space.start = TAISHAN_PCI_LOWER_IO;
+        hose->io_space.end = TAISHAN_PCI_UPPER_IO;
+        hose->mem_space.start = TAISHAN_PCI_LOWER_MEM;
+        hose->mem_space.end = TAISHAN_PCI_UPPER_MEM;
+        hose->io_base_virt = ioremap64(TAISHAN_PCI_IO_BASE, TAISHAN_PCI_IO_SIZE);
+        isa_io_base = (unsigned long) hose->io_base_virt;
+
+        setup_indirect_pci(hose,
+                        TAISHAN_PCI_CFGA_PLB32,
+                        TAISHAN_PCI_CFGD_PLB32);
+        hose->set_cfg_type = 1;
+
+        hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
+
+        ppc_md.pci_swizzle = common_swizzle;
+        ppc_md.pci_map_irq = taishan_map_irq;
+}
+
+
+static void __init
+taishan_early_serial_map(void)
+{
+        struct uart_port port;
+
+        /* Setup ioremapped serial port access */
+        memset(&port, 0, sizeof(port));
+        port.membase = ioremap64(PPC440GX_UART0_ADDR, 8);
+        port.irq = UART0_INT;
+        port.uartclk = clocks.uart0;
+        port.regshift = 0;
+        port.iotype = UPIO_MEM;
+        port.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
+        port.line = 0;
+
+        if (early_serial_setup(&port) != 0)
+                printk("Early serial init of port 0 failed\n");
+
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+        /* Configure debug serial access */
+        gen550_init(0, &port);
+
+        /* Purge TLB entry added in head_44x.S for early serial access */
+        _tlbie(UART0_IO_BASE);
+#endif
+
+        port.membase = ioremap64(PPC440GX_UART1_ADDR, 8);
+        port.irq = UART1_INT;
+        port.uartclk = clocks.uart1;
+        port.line = 1;
+
+        if (early_serial_setup(&port) != 0)
+                printk("Early serial init of port 1 failed\n");
+
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+        /* Configure debug serial access */
+        gen550_init(1, &port);
+#endif
+}
+
+static void __init
+taishan_setup_arch(void)
+{
+        taishan_set_emacdata();
+
+        ibm440gx_tah_enable();
+
+        /*
+         * Determine various clocks.
+         * To be completely correct we should get SysClk
+         * from FPGA, because it can be changed by on-board switches
+         * --ebs
+         */
+        ibm440gx_get_clocks(&clocks, 33333333, 6 * 1843200);
+        ocp_sys_info.opb_bus_freq = clocks.opb;
+
+        /* init to some ~sane value until calibrate_delay() runs */
+        loops_per_jiffy = 50000000/HZ;
+
+        /* Setup PCI host bridge */
+        taishan_setup_hose();
+
+#ifdef CONFIG_BLK_DEV_INITRD
+        if (initrd_start)
+                ROOT_DEV = Root_RAM0;
+        else
+#endif
+#ifdef CONFIG_ROOT_NFS
+                ROOT_DEV = Root_NFS;
+#else
+                ROOT_DEV = Root_HDA1;
+#endif
+
+        taishan_early_serial_map();
+
+        /* Identify the system */
+        printk("AMCC PowerPC 440GX Taishan Platform\n");
+}
+
+static void __init taishan_init(void)
+{
+        ibm440gx_l2c_setup(&clocks);
+}
+
+void __init platform_init(unsigned long r3, unsigned long r4,
+                unsigned long r5, unsigned long r6, unsigned long r7)
+{
+        ibm44x_platform_init(r3, r4, r5, r6, r7);
+
+        ppc_md.setup_arch = taishan_setup_arch;
+        ppc_md.show_cpuinfo = taishan_show_cpuinfo;
+        ppc_md.get_irq = NULL;          /* Set in ppc4xx_pic_init() */
+
+        ppc_md.calibrate_decr = taishan_calibrate_decr;
+
+#ifdef CONFIG_KGDB
+        ppc_md.early_serial_map = taishan_early_serial_map;
+#endif
+        ppc_md.init = taishan_init;
+}
+
diff --git a/arch/ppc/platforms/4xx/taishan.h b/arch/ppc/platforms/4xx/taishan.h
new file mode 100644
index 000000000000..ea7561a80457
--- /dev/null
+++ b/arch/ppc/platforms/4xx/taishan.h
@@ -0,0 +1,67 @@
+/*
+ * arch/ppc/platforms/4xx/taishan.h
+ *
+ * AMCC Taishan board definitions
+ *
+ * Copyright 2007 DENX Software Engineering, Stefan Roese <sr@denx.de>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ */
+
+#ifdef __KERNEL__
+#ifndef __ASM_TAISHAN_H__
+#define __ASM_TAISHAN_H__
+
+#include <platforms/4xx/ibm440gx.h>
+
+/* External timer clock frequency */
+#define TAISHAN_TMR_CLK 25000000
+
+/* Flash */
+#define TAISHAN_FPGA_ADDR               0x0000000141000000ULL
+#define TAISHAN_LCM_ADDR                0x0000000142000000ULL
+#define TAISHAN_FLASH_ADDR              0x00000001fc000000ULL
+#define TAISHAN_FLASH_SIZE              0x4000000
+
+/*
+ * Serial port defines
+ */
+#define RS_TABLE_SIZE   2
+
+/* head_44x.S created UART mapping, used before early_serial_setup.
+ * We cannot use default OpenBIOS UART mappings because they
+ * don't work for configurations with more than 512M RAM.    --ebs
+ */
+#define UART0_IO_BASE   0xF0000200
+#define UART1_IO_BASE   0xF0000300
+
+#define BASE_BAUD       11059200/16
+#define STD_UART_OP(num)                                        \
+        { 0, BASE_BAUD, 0, UART##num##_INT,                     \
+                (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST),        \
+                iomem_base: (void*)UART##num##_IO_BASE,         \
+                io_type: SERIAL_IO_MEM},
+
+#define SERIAL_PORT_DFNS        \
+        STD_UART_OP(0)          \
+        STD_UART_OP(1)
+
+/* PCI support */
+#define TAISHAN_PCI_LOWER_IO    0x00000000
+#define TAISHAN_PCI_UPPER_IO    0x0000ffff
+#define TAISHAN_PCI_LOWER_MEM   0x80000000
+#define TAISHAN_PCI_UPPER_MEM   0xffffefff
+
+#define TAISHAN_PCI_CFGA_PLB32  0x0ec00000
+#define TAISHAN_PCI_CFGD_PLB32  0x0ec00004
+
+#define TAISHAN_PCI_IO_BASE     0x0000000208000000ULL
+#define TAISHAN_PCI_IO_SIZE     0x00010000
+#define TAISHAN_PCI_MEM_OFFSET  0x00000000
+
+#endif                          /* __ASM_TAISHAN_H__ */
+#endif                          /* __KERNEL__ */