diff options
Diffstat (limited to 'arch/ppc/platforms/4xx/bamboo.c')
| -rw-r--r-- | arch/ppc/platforms/4xx/bamboo.c | 427 |
1 files changed, 427 insertions, 0 deletions
diff --git a/arch/ppc/platforms/4xx/bamboo.c b/arch/ppc/platforms/4xx/bamboo.c new file mode 100644 index 0000000..f116787 --- /dev/null +++ b/arch/ppc/platforms/4xx/bamboo.c @@ -0,0 +1,427 @@ +/* + * arch/ppc/platforms/4xx/bamboo.c + * + * Bamboo board specific routines + * + * Wade Farnsworth <wfarnsworth@mvista.com> + * Copyright 2004 MontaVista Software Inc. + * + * 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/config.h> +#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/irq.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/ethtool.h> + +#include <asm/system.h> +#include <asm/pgtable.h> +#include <asm/page.h> +#include <asm/dma.h> +#include <asm/io.h> +#include <asm/machdep.h> +#include <asm/ocp.h> +#include <asm/pci-bridge.h> +#include <asm/time.h> +#include <asm/todc.h> +#include <asm/bootinfo.h> +#include <asm/ppc4xx_pic.h> +#include <asm/ppcboot.h> + +#include <syslib/gen550.h> +#include <syslib/ibm440gx_common.h> + +/* + * This is a horrible kludge, we eventually need to abstract this + * generic PHY stuff, so the standard phy mode defines can be + * easily used from arch code. + */ +#include "../../../../drivers/net/ibm_emac/ibm_emac_phy.h" + +bd_t __res; + +static struct ibm44x_clocks clocks __initdata; + +/* + * Bamboo external IRQ triggering/polarity settings + */ +unsigned char ppc4xx_uic_ext_irq_cfg[] __initdata = { + (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ0: Ethernet transceiver */ + (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* IRQ1: Expansion connector */ + (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ2: PCI slot 0 */ + (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ3: PCI slot 1 */ + (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ4: PCI slot 2 */ + (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ5: PCI slot 3 */ + (IRQ_SENSE_EDGE | IRQ_POLARITY_NEGATIVE), /* IRQ6: SMI pushbutton */ + (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ7: EXT */ + (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ8: EXT */ + (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ9: EXT */ +}; + +static void __init +bamboo_calibrate_decr(void) +{ + unsigned int freq; + + if (mfspr(SPRN_CCR1) & CCR1_TCS) + freq = BAMBOO_TMRCLK; + else + freq = clocks.cpu; + + ibm44x_calibrate_decr(freq); + +} + +static int +bamboo_show_cpuinfo(struct seq_file *m) +{ + seq_printf(m, "vendor\t\t: IBM\n"); + seq_printf(m, "machine\t\t: PPC440EP EVB (Bamboo)\n"); + + return 0; +} + +static inline int +bamboo_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 + */ + { + { 28, 28, 28, 28 }, /* IDSEL 1 - PCI Slot 0 */ + { 27, 27, 27, 27 }, /* IDSEL 2 - PCI Slot 1 */ + { 26, 26, 26, 26 }, /* IDSEL 3 - PCI Slot 2 */ + { 25, 25, 25, 25 }, /* IDSEL 4 - PCI Slot 3 */ + }; + + const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4; + return PCI_IRQ_TABLE_LOOKUP; +} + +static void __init bamboo_set_emacdata(void) +{ + unsigned char * selection1_base; + struct ocp_def *def; + struct ocp_func_emac_data *emacdata; + u8 selection1_val; + int mode; + + selection1_base = ioremap64(BAMBOO_FPGA_SELECTION1_REG_ADDR, 16); + selection1_val = readb(selection1_base); + iounmap((void *) selection1_base); + if (BAMBOO_SEL_MII(selection1_val)) + mode = PHY_MODE_MII; + else if (BAMBOO_SEL_RMII(selection1_val)) + mode = PHY_MODE_RMII; + else + mode = PHY_MODE_SMII; + + /* Set mac_addr and phy mode 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 = mode; + + 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 = mode; +} + +static int +bamboo_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))) + +static void __init +bamboo_setup_pci(void) +{ + void *pci_reg_base; + unsigned long memory_size; + memory_size = ppc_md.find_end_of_memory(); + + pci_reg_base = ioremap64(BAMBOO_PCIL0_BASE, BAMBOO_PCIL0_SIZE); + + /* Enable PCI I/O, Mem, and Busmaster cycles */ + PCI_WRITEW(PCI_READW(PCI_COMMAND) | + PCI_COMMAND_MEMORY | + PCI_COMMAND_MASTER, PCI_COMMAND); + + /* Disable region first */ + PCI_WRITEL(0, BAMBOO_PCIL0_PMM0MA); + + /* PLB starting addr: 0x00000000A0000000 */ + PCI_WRITEL(BAMBOO_PCI_PHY_MEM_BASE, BAMBOO_PCIL0_PMM0LA); + + /* PCI start addr, 0xA0000000 (PCI Address) */ + PCI_WRITEL(BAMBOO_PCI_MEM_BASE, BAMBOO_PCIL0_PMM0PCILA); + PCI_WRITEL(0, BAMBOO_PCIL0_PMM0PCIHA); + + /* Enable no pre-fetch, enable region */ + PCI_WRITEL(((0xffffffff - + (BAMBOO_PCI_UPPER_MEM - BAMBOO_PCI_MEM_BASE)) | 0x01), + BAMBOO_PCIL0_PMM0MA); + + /* Disable region one */ + PCI_WRITEL(0, BAMBOO_PCIL0_PMM1MA); + PCI_WRITEL(0, BAMBOO_PCIL0_PMM1LA); + PCI_WRITEL(0, BAMBOO_PCIL0_PMM1PCILA); + PCI_WRITEL(0, BAMBOO_PCIL0_PMM1PCIHA); + PCI_WRITEL(0, BAMBOO_PCIL0_PMM1MA); + + /* Disable region two */ + PCI_WRITEL(0, BAMBOO_PCIL0_PMM2MA); + PCI_WRITEL(0, BAMBOO_PCIL0_PMM2LA); + PCI_WRITEL(0, BAMBOO_PCIL0_PMM2PCILA); + PCI_WRITEL(0, BAMBOO_PCIL0_PMM2PCIHA); + PCI_WRITEL(0, BAMBOO_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, BAMBOO_PCIL0_PTM1MS); /* disabled region 1 */ + PCI_WRITEL(0, BAMBOO_PCIL0_PTM1LA); /* begin of address map */ + + memory_size = 1 << fls(memory_size - 1); + + /* Size low + Enabled */ + PCI_WRITEL((0xffffffff - (memory_size - 1)) | 0x1, BAMBOO_PCIL0_PTM1MS); + + eieio(); + iounmap(pci_reg_base); +} + +static void __init +bamboo_setup_hose(void) +{ + unsigned int bar_response, bar; + struct pci_controller *hose; + + bamboo_setup_pci(); + + hose = pcibios_alloc_controller(); + + if (!hose) + return; + + hose->first_busno = 0; + hose->last_busno = 0xff; + + hose->pci_mem_offset = BAMBOO_PCI_MEM_OFFSET; + + pci_init_resource(&hose->io_resource, + BAMBOO_PCI_LOWER_IO, + BAMBOO_PCI_UPPER_IO, + IORESOURCE_IO, + "PCI host bridge"); + + pci_init_resource(&hose->mem_resources[0], + BAMBOO_PCI_LOWER_MEM, + BAMBOO_PCI_UPPER_MEM, + IORESOURCE_MEM, + "PCI host bridge"); + + ppc_md.pci_exclude_device = bamboo_exclude_device; + + hose->io_space.start = BAMBOO_PCI_LOWER_IO; + hose->io_space.end = BAMBOO_PCI_UPPER_IO; + hose->mem_space.start = BAMBOO_PCI_LOWER_MEM; + hose->mem_space.end = BAMBOO_PCI_UPPER_MEM; + isa_io_base = + (unsigned long)ioremap64(BAMBOO_PCI_IO_BASE, BAMBOO_PCI_IO_SIZE); + hose->io_base_virt = (void *)isa_io_base; + + setup_indirect_pci(hose, + BAMBOO_PCI_CFGA_PLB32, + BAMBOO_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 = bamboo_map_irq; +} + +TODC_ALLOC(); + +static void __init +bamboo_early_serial_map(void) +{ + struct uart_port port; + + /* Setup ioremapped serial port access */ + memset(&port, 0, sizeof(port)); + port.membase = ioremap64(PPC440EP_UART0_ADDR, 8); + port.irq = 0; + 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(PPC440EP_UART1_ADDR, 8); + port.irq = 1; + 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(PPC440EP_UART2_ADDR, 8); + port.irq = 3; + 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(PPC440EP_UART3_ADDR, 8); + port.irq = 4; + 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 +bamboo_setup_arch(void) +{ + + bamboo_set_emacdata(); + + ibm440gx_get_clocks(&clocks, 33333333, 6 * 1843200); + ocp_sys_info.opb_bus_freq = clocks.opb; + + /* Setup TODC access */ + TODC_INIT(TODC_TYPE_DS1743, + 0, + 0, + ioremap64(BAMBOO_RTC_ADDR, BAMBOO_RTC_SIZE), + 8); + + /* init to some ~sane value until calibrate_delay() runs */ + loops_per_jiffy = 50000000/HZ; + + /* Setup PCI host bridge */ + bamboo_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 + + bamboo_early_serial_map(); + + /* Identify the system */ + printk("IBM Bamboo port (MontaVista Software, Inc. (source@mvista.com))\n"); +} + +void __init platform_init(unsigned long r3, unsigned long r4, + unsigned long r5, unsigned long r6, unsigned long r7) +{ + parse_bootinfo(find_bootinfo()); + + /* + * If we were passed in a board information, copy it into the + * residual data area. + */ + if (r3) + __res = *(bd_t *)(r3 + KERNELBASE); + + + ibm44x_platform_init(); + + ppc_md.setup_arch = bamboo_setup_arch; + ppc_md.show_cpuinfo = bamboo_show_cpuinfo; + ppc_md.get_irq = NULL; /* Set in ppc4xx_pic_init() */ + + ppc_md.calibrate_decr = bamboo_calibrate_decr; + ppc_md.time_init = todc_time_init; + ppc_md.set_rtc_time = todc_set_rtc_time; + ppc_md.get_rtc_time = todc_get_rtc_time; + + ppc_md.nvram_read_val = todc_direct_read_val; + ppc_md.nvram_write_val = todc_direct_write_val; +#ifdef CONFIG_KGDB + ppc_md.early_serial_map = bamboo_early_serial_map; +#endif +} + |