ppc: Add support for AMCC Sequoia (440EPx) and Rainier (440GRx) boards

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+/*
+ * arch/ppc/platforms/4xx/sequoia.c
+ *
+ * Sequoia board specific routines
+ *
+ * Copyright 2006-2007 DENX Software Engineering, Stefan Roese <[email protected]>
+ *
+ * Based on bamboo.c from Wade Farnsworth <[email protected]>
+ *	Copyright 2004 MontaVista Software Inc.
+ *	Copyright 2006 AMCC
+ *
+ * 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/pci.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/initrd.h>
+#include <linux/irq.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/ppc4xx_pic.h>
+#include <asm/ppcboot.h>
+
+#include <syslib/gen550.h>
+#include <syslib/ibm440gx_common.h>
+
+#ifdef CONFIG_SEQUOIA
+#define BOARDNAME  "440EPx Sequoia"
+#else
+#define BOARDNAME  "440GRx Rainier"
+#endif
+
+extern bd_t __res;
+
+static struct ibm44x_clocks clocks __initdata;
+
+/*
+ * Sequoia external IRQ triggering/polarity settings
+ */
+unsigned char ppc4xx_uic_ext_irq_cfg[] __initdata = {
+	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Index0 - IRQ4: */
+	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Index1 - IRQ7: */
+	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Index2 - IRQ8: */
+	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Index3 - IRQ9: */
+	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Index4 - IRQ0: Ethernet 0 */
+	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Index5 - IRQ1: Ethernet 1 */
+	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Index6 - IRQ5: */
+	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Index7 - IRQ6: */
+	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Index8 - IRQ2: PCI slots */
+	(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Index9 - IRQ3: STTM alert */
+};
+
+/*
+ * NOR FLASH configuration (using mtd physmap driver)
+ */
+
+/* start will be added dynamically, end is always fixed */
+static struct resource sequoia_nor_resource = {
+		.flags = IORESOURCE_MEM,
+};
+
+#define RW_PART0_OF	0
+#define RW_PART0_SZ	0x180000
+#define RW_PART1_SZ	0x280000
+/* Partition 2 will be autosized dynamically... */
+#define RW_PART3_SZ	0x40000
+#define RW_PART4_SZ	0x60000
+
+static struct mtd_partition sequoia_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,
+	},
+	{
+		.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 sequoia_nor_data = {
+	.width		= 2,
+	.parts		= sequoia_nor_parts,
+	.nr_parts	= ARRAY_SIZE(sequoia_nor_parts),
+};
+
+static struct platform_device sequoia_nor_device = {
+	.name		= "physmap-flash",
+	.id		= 0,
+	.dev = {
+			.platform_data = &sequoia_nor_data,
+		},
+	.num_resources	= 1,
+	.resource	= &sequoia_nor_resource,
+};
+
+/*
+ * NAND FLASH configuration (using 440EP(x) NDFC)
+ */
+static struct resource sequoia_ndfc = {
+	.start = (u32)SEQUOIA_NAND_FLASH_REG_ADDR,
+	.end = (u32)SEQUOIA_NAND_FLASH_REG_ADDR + SEQUOIA_NAND_FLASH_REG_SIZE,
+	.flags = IORESOURCE_MEM,
+};
+
+/* todo: add logic to detect booting from NAND (NAND on CS0) */
+#define CS_NAND_0	3	/* use chip select 3 for NAND device 0 */
+
+static struct mtd_partition sequoia_nand_parts[] = {
+        {
+                .name   = "content",
+                .offset = 0,
+                .size   = MTDPART_SIZ_FULL,
+        }
+};
+
+struct ndfc_controller_settings sequoia_ndfc_settings = {
+	.ccr_settings = (NDFC_CCR_BS(CS_NAND_0) |
+			 NDFC_CCR_ARAC1),
+	.ndfc_erpn = SEQUOIA_NAND_FLASH_REG_ADDR & 0xf00000000ULL,
+};
+
+struct platform_nand_ctrl sequoia_nand_ctrl = {
+	.priv = &sequoia_ndfc_settings,
+};
+
+static struct platform_device sequoia_ndfc_device = {
+	.name = "ndfc-nand",
+	.id = 0,
+	.dev = {
+		.platform_data = &sequoia_nand_ctrl,
+	},
+	.num_resources = 1,
+	.resource = &sequoia_ndfc,
+};
+
+static struct ndfc_chip_settings sequoia_chip0_settings = {
+	.bank_settings = 0x80002222,
+};
+
+static struct nand_ecclayout nand_oob_16 = {
+	.eccbytes = 6,
+	.eccpos = {9, 10, 11, 13, 14, 15},
+	.oobfree = {
+		 {.offset = 8,
+		  . length = 8}}
+};
+
+static struct platform_nand_chip sequoia_nand_chip0 = {
+	.nr_chips = 1,
+	.chip_offset = CS_NAND_0,
+	.nr_partitions = ARRAY_SIZE(sequoia_nand_parts),
+	.partitions = sequoia_nand_parts,
+	.chip_delay = 50,
+	.ecclayout = &nand_oob_16,
+	.priv = &sequoia_chip0_settings,
+};
+
+static struct platform_device sequoia_nand_device = {
+	.name = "ndfc-chip",
+	.id = 0,
+	.num_resources = 1,
+	.resource = &sequoia_ndfc,
+	.dev = {
+		.platform_data = &sequoia_nand_chip0,
+		.parent = &sequoia_ndfc_device.dev,
+	}
+};
+
+static int sequoia_setup_flash(void)
+{
+	sequoia_nor_resource.start = __res.bi_flashstart;
+	sequoia_nor_resource.end = __res.bi_flashstart +
+		__res.bi_flashsize - 1;
+
+	/*
+	 * Adjust partition 2 to flash size
+	 */
+	sequoia_nor_parts[2].size = __res.bi_flashsize -
+		RW_PART0_SZ - RW_PART1_SZ - RW_PART3_SZ - RW_PART4_SZ;
+
+	platform_device_register(&sequoia_nor_device);
+
+	/* todo: add logic to detect booting from NAND (NAND on CS0) */
+
+	platform_device_register(&sequoia_ndfc_device);
+	platform_device_register(&sequoia_nand_device);
+
+	return 0;
+}
+arch_initcall(sequoia_setup_flash);
+
+/*
+ * get size of system memory from Board Info .
+ */
+unsigned long __init sequoia_find_end_of_memory(void)
+{
+	/* board info structure defined in /include/asm-ppc/ppcboot.h */
+	return  __res.bi_memsize;
+}
+
+static void __init sequoia_calibrate_decr(void)
+{
+	unsigned int freq;
+
+	if (mfspr(SPRN_CCR1) & CCR1_TCS)
+		freq = SEQUOIA_TMRCLK;
+	else
+		freq = clocks.cpu;
+
+	ibm44x_calibrate_decr(freq);
+
+}
+
+static int sequoia_show_cpuinfo(struct seq_file *m)
+{
+	seq_printf(m, "vendor\t\t: AMCC\n");
+	seq_printf(m, "machine\t\t: PPC" BOARDNAME "\n");
+
+	return 0;
+}
+
+static inline int
+sequoia_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
+	 */
+	{
+		{ 67, 67, 67, 67 },	/* IDSEL 10 - PCI Slot 1, ext. IRQ 2 */
+		{ 67, 67, 67, 67 },	/* IDSEL 11 - PCI Slot x, ext. IRQ 2 */
+		{ 67, 67, 67, 67 },	/* IDSEL 12 - PCI Slot 0, ext. IRQ 2 */
+	};
+
+	const long min_idsel = 10, max_idsel = 12, irqs_per_slot = 4;
+	return PCI_IRQ_TABLE_LOOKUP;
+}
+
+static void __init sequoia_set_emacdata(void)
+{
+	struct ocp_def *def;
+	struct ocp_func_emac_data *emacdata;
+
+	/* Set mac_addr, phy mode and unsupported phy features for each EMAC */
+
+	def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 0);
+	emacdata = def->additions;
+	memcpy(emacdata->mac_addr, __res.bi_enetaddr, 6);
+	emacdata->phy_mode = PHY_MODE_RGMII;
+
+	def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 1);
+	emacdata = def->additions;
+	memcpy(emacdata->mac_addr, __res.bi_enet1addr, 6);
+	emacdata->phy_mode = PHY_MODE_RGMII;
+
+        /*
+         * Clear PLB4A0_ACR[WRP] (Write Pipeline Control)
+         * This fix will make the MAL burst disabling patch for the Linux
+         * EMAC driver obsolete.
+         */
+	mtdcr(DCRN_PLB4A0_ACR, mfdcr(DCRN_PLB4A0_ACR) & ~(0x80000000 >> 7));
+}
+
+static int sequoia_exclude_device(unsigned char bus, unsigned char devfn)
+{
+	return (bus == 0 && devfn == 0);
+}
+
+#define PCI_READW(offset) \
+        (readw((void *)((u32)pci_reg_base + offset)))
+
+#define PCI_WRITEW(value, offset) \
+	(writew(value, (void *)((u32)pci_reg_base + offset)))
+
+#define PCI_WRITEL(value, offset) \
+	(writel(value, (void *)((u32)pci_reg_base + offset)))
+
+#define PCI_CFG_OUT(offset, value) \
+	(out_le32 (pci_cfg_base + offset, value))
+
+#define PCI_CFG_IN(offset) \
+	(in_le32(pci_cfg_base + offset))
+
+static void __init sequoia_setup_pci(void)
+{
+	void *pci_reg_base;
+	void *pci_cfg_base;
+	unsigned long memory_size;
+
+	memory_size = ppc_md.find_end_of_memory();
+
+	pci_reg_base = ioremap64(SEQUOIA_PCIL0_BASE, SEQUOIA_PCIL0_SIZE);
+	pci_cfg_base = ioremap64(SEQUOIA_PCI_CFGREGS_BASE, 64);
+
+	PCI_CFG_OUT(SEQUOIA_PCI_CFGA_OFFSET, 0x80000000 | (PCI_COMMAND & 0xfc));
+	PCI_CFG_OUT(SEQUOIA_PCI_CFGD_OFFSET,
+		    (PCI_CFG_IN(SEQUOIA_PCI_CFGD_OFFSET) |
+		     PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER));
+
+	/* Disable region first */
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PMM0MA);
+
+	/* PLB starting addr: 0x0000000180000000 */
+	PCI_WRITEL(SEQUOIA_PCI_PHY_MEM_BASE, SEQUOIA_PCIL0_PMM0LA);
+
+	/* PCI start addr, 0x80000000 (PCI Address) */
+	PCI_WRITEL(SEQUOIA_PCI_MEM_BASE, SEQUOIA_PCIL0_PMM0PCILA);
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PMM0PCIHA);
+
+	/* Enable no pre-fetch, enable region */
+	PCI_WRITEL(((0xffffffff -
+		     (SEQUOIA_PCI_UPPER_MEM - SEQUOIA_PCI_MEM_BASE)) | 0x01),
+		   SEQUOIA_PCIL0_PMM0MA);
+
+	/* Disable region one */
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PMM1MA);
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PMM1LA);
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PMM1PCILA);
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PMM1PCIHA);
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PMM1MA);
+
+	/* Disable region two */
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PMM2MA);
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PMM2LA);
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PMM2PCILA);
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PMM2PCIHA);
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PMM2MA);
+
+	/* Now configure the PCI->PLB windows, we only use PTM1
+	 *
+	 * For Inbound flow, set the window size to all available memory
+	 * This is required because if size is smaller,
+	 * then Eth/PCI DD would fail as PCI card not able to access
+	 * the memory allocated by DD.
+	 */
+
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PTM1MS);	/* disabled region 1 */
+	PCI_WRITEL(0, SEQUOIA_PCIL0_PTM1LA);	/* begin of address map */
+
+	memory_size = 1 << fls(memory_size - 1);
+
+	/* Size low + Enabled */
+	PCI_WRITEL((0xffffffff - (memory_size - 1)) | 0x1, SEQUOIA_PCIL0_PTM1MS);
+
+	eieio();
+	iounmap(pci_reg_base);
+	iounmap(pci_cfg_base);
+}
+
+static void __init sequoia_setup_hose(void)
+{
+	unsigned int bar_response, bar;
+	struct pci_controller *hose;
+
+	sequoia_setup_pci();
+
+	hose = pcibios_alloc_controller();
+
+	if (!hose)
+		return;
+
+	hose->first_busno = 0;
+	hose->last_busno = 0xff;
+
+	hose->pci_mem_offset = SEQUOIA_PCI_MEM_OFFSET;
+
+	pci_init_resource(&hose->io_resource,
+			  SEQUOIA_PCI_LOWER_IO,
+			  SEQUOIA_PCI_UPPER_IO,
+			  IORESOURCE_IO,
+			  "PCI host bridge");
+
+	pci_init_resource(&hose->mem_resources[0],
+			  SEQUOIA_PCI_LOWER_MEM,
+			  SEQUOIA_PCI_UPPER_MEM,
+			  IORESOURCE_MEM,
+			  "PCI host bridge");
+
+	ppc_md.pci_exclude_device = sequoia_exclude_device;
+
+	hose->io_space.start = SEQUOIA_PCI_LOWER_IO;
+	hose->io_space.end = SEQUOIA_PCI_UPPER_IO;
+	hose->mem_space.start = SEQUOIA_PCI_LOWER_MEM;
+	hose->mem_space.end = SEQUOIA_PCI_UPPER_MEM;
+	isa_io_base =
+		(unsigned long)ioremap64(SEQUOIA_PCI_IO_BASE, SEQUOIA_PCI_IO_SIZE);
+	hose->io_base_virt = (void *)isa_io_base;
+
+	setup_indirect_pci(hose, SEQUOIA_PCI_CFGA_PLB32, SEQUOIA_PCI_CFGD_PLB32);
+	hose->set_cfg_type = 1;
+
+	/* Zero config bars */
+	for (bar = PCI_BASE_ADDRESS_1; bar <= PCI_BASE_ADDRESS_2; bar += 4) {
+		early_write_config_dword(hose, hose->first_busno,
+					 PCI_FUNC(hose->first_busno), bar,
+					 0x00000000);
+		early_read_config_dword(hose, hose->first_busno,
+					PCI_FUNC(hose->first_busno), bar,
+					&bar_response);
+	}
+
+	hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
+
+	ppc_md.pci_swizzle = common_swizzle;
+	ppc_md.pci_map_irq = sequoia_map_irq;
+}
+
+static void __init sequoia_early_serial_map(void)
+{
+	struct uart_port port;
+
+	/* Setup ioremapped serial port access */
+	memset(&port, 0, sizeof(port));
+	port.membase = ioremap64(PPC440EPX_UART0_ADDR, 8);
+	port.irq = UART0_INT;
+	port.uartclk = clocks.uart0;
+	port.regshift = 0;
+	port.iotype = SERIAL_IO_MEM;
+	port.flags = ASYNC_BOOT_AUTOCONF | ASYNC_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);
+#endif
+
+	port.membase = ioremap64(PPC440EPX_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
+
+	port.membase = ioremap64(PPC440EPX_UART2_ADDR, 8);
+	port.irq = UART2_INT;
+	port.uartclk = clocks.uart2;
+	port.line = 2;
+
+	if (early_serial_setup(&port) != 0)
+		printk("Early serial init of port 2 failed\n");
+
+#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
+	/* Configure debug serial access */
+	gen550_init(2, &port);
+#endif
+
+	port.membase = ioremap64(PPC440EPX_UART3_ADDR, 8);
+	port.irq = UART3_INT;
+	port.uartclk = clocks.uart3;
+	port.line = 3;
+
+	if (early_serial_setup(&port) != 0)
+		printk("Early serial init of port 3 failed\n");
+}
+
+static void __init sequoia_setup_arch(void)
+{
+	sequoia_set_emacdata();
+
+	/* parm1 = sys clock is OK , parm 2 ser_clock to be checked */
+	ibm440gx_get_clocks(&clocks, 33000000, 6 * 1843200);
+	ocp_sys_info.opb_bus_freq = clocks.opb;
+	ocp_sys_info.plb_bus_freq = clocks.plb;
+
+	/* init to some ~sane value until calibrate_delay() runs */
+        loops_per_jiffy = 50000000/HZ;
+
+	/* Setup PCI host bridge */
+	sequoia_setup_hose();
+
+#ifdef CONFIG_BLK_DEV_INITRD
+	if (initrd_start)
+		ROOT_DEV = Root_RAM0;
+	else {
+#ifdef CONFIG_ROOT_NFS
+		ROOT_DEV = Root_NFS;
+#else
+		ROOT_DEV = Root_HDA1;
+#endif
+	}
+#endif
+
+	sequoia_early_serial_map();
+
+	/* Identify the system */
+	printk("AMCC PowerPC " BOARDNAME " Platform\n");
+}
+
+static void __init sequoia_init_irq(void)
+{
+	ppc4xx_pic_init();
+}
+
+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 = sequoia_setup_arch;
+	ppc_md.show_cpuinfo = sequoia_show_cpuinfo;
+	ppc_md.find_end_of_memory = sequoia_find_end_of_memory;
+	ppc_md.get_irq = NULL;		/* Set in ppc4xx_pic_init() */
+
+	ppc_md.calibrate_decr = sequoia_calibrate_decr;
+	ppc_md.time_init = NULL;
+	ppc_md.set_rtc_time = NULL;
+	ppc_md.get_rtc_time = NULL;
+
+	ppc_md.init_IRQ = sequoia_init_irq;
+
+#ifdef CONFIG_KGDB
+	ppc_md.early_serial_map = sequoia_early_serial_map;
+#endif
+}

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