Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * arch/ppc/platforms/4xx/xilinx_ml300.c |
| 3 | * |
| 4 | * Xilinx ML300 evaluation board initialization |
| 5 | * |
| 6 | * Author: MontaVista Software, Inc. |
| 7 | * source@mvista.com |
| 8 | * |
| 9 | * 2002-2004 (c) MontaVista Software, Inc. This file is licensed under the |
| 10 | * terms of the GNU General Public License version 2. This program is licensed |
| 11 | * "as is" without any warranty of any kind, whether express or implied. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/config.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/irq.h> |
| 17 | #include <linux/tty.h> |
| 18 | #include <linux/serial.h> |
| 19 | #include <linux/serial_core.h> |
Grant C. Likely | e27db62 | 2006-01-19 01:13:03 -0700 | [diff] [blame^] | 20 | #include <linux/serial_8250.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/serialP.h> |
| 22 | #include <asm/io.h> |
| 23 | #include <asm/machdep.h> |
Grant C. Likely | e27db62 | 2006-01-19 01:13:03 -0700 | [diff] [blame^] | 24 | #include <asm/ppc_sys.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
Grant C. Likely | e27db62 | 2006-01-19 01:13:03 -0700 | [diff] [blame^] | 26 | #include <syslib/gen550.h> |
| 27 | #include <platforms/4xx/xparameters/xparameters.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
| 29 | /* |
| 30 | * As an overview of how the following functions (platform_init, |
| 31 | * ml300_map_io, ml300_setup_arch and ml300_init_IRQ) fit into the |
| 32 | * kernel startup procedure, here's a call tree: |
| 33 | * |
| 34 | * start_here arch/ppc/kernel/head_4xx.S |
| 35 | * early_init arch/ppc/kernel/setup.c |
| 36 | * machine_init arch/ppc/kernel/setup.c |
| 37 | * platform_init this file |
| 38 | * ppc4xx_init arch/ppc/syslib/ppc4xx_setup.c |
| 39 | * parse_bootinfo |
| 40 | * find_bootinfo |
| 41 | * "setup some default ppc_md pointers" |
| 42 | * MMU_init arch/ppc/mm/init.c |
| 43 | * *ppc_md.setup_io_mappings == ml300_map_io this file |
| 44 | * ppc4xx_map_io arch/ppc/syslib/ppc4xx_setup.c |
| 45 | * start_kernel init/main.c |
| 46 | * setup_arch arch/ppc/kernel/setup.c |
| 47 | * #if defined(CONFIG_KGDB) |
| 48 | * *ppc_md.kgdb_map_scc() == gen550_kgdb_map_scc |
| 49 | * #endif |
| 50 | * *ppc_md.setup_arch == ml300_setup_arch this file |
| 51 | * ppc4xx_setup_arch arch/ppc/syslib/ppc4xx_setup.c |
| 52 | * ppc4xx_find_bridges arch/ppc/syslib/ppc405_pci.c |
| 53 | * init_IRQ arch/ppc/kernel/irq.c |
| 54 | * *ppc_md.init_IRQ == ml300_init_IRQ this file |
| 55 | * ppc4xx_init_IRQ arch/ppc/syslib/ppc4xx_setup.c |
| 56 | * ppc4xx_pic_init arch/ppc/syslib/xilinx_pic.c |
| 57 | */ |
| 58 | |
Grant C. Likely | e27db62 | 2006-01-19 01:13:03 -0700 | [diff] [blame^] | 59 | /* Board specifications structures */ |
| 60 | struct ppc_sys_spec *cur_ppc_sys_spec; |
| 61 | struct ppc_sys_spec ppc_sys_specs[] = { |
| 62 | { |
| 63 | /* Only one entry, always assume the same design */ |
| 64 | .ppc_sys_name = "Xilinx ML300 Reference Design", |
| 65 | .mask = 0x00000000, |
| 66 | .value = 0x00000000, |
| 67 | .num_devices = 1, |
| 68 | .device_list = (enum ppc_sys_devices[]) |
| 69 | { |
| 70 | VIRTEX_UART, |
| 71 | }, |
| 72 | }, |
| 73 | }; |
| 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | #if defined(XPAR_POWER_0_POWERDOWN_BASEADDR) |
| 76 | |
| 77 | static volatile unsigned *powerdown_base = |
| 78 | (volatile unsigned *) XPAR_POWER_0_POWERDOWN_BASEADDR; |
| 79 | |
| 80 | static void |
| 81 | xilinx_power_off(void) |
| 82 | { |
| 83 | local_irq_disable(); |
| 84 | out_be32(powerdown_base, XPAR_POWER_0_POWERDOWN_VALUE); |
| 85 | while (1) ; |
| 86 | } |
| 87 | #endif |
| 88 | |
| 89 | void __init |
| 90 | ml300_map_io(void) |
| 91 | { |
| 92 | ppc4xx_map_io(); |
| 93 | |
| 94 | #if defined(XPAR_POWER_0_POWERDOWN_BASEADDR) |
| 95 | powerdown_base = ioremap((unsigned long) powerdown_base, |
| 96 | XPAR_POWER_0_POWERDOWN_HIGHADDR - |
| 97 | XPAR_POWER_0_POWERDOWN_BASEADDR + 1); |
| 98 | #endif |
| 99 | } |
| 100 | |
Grant C. Likely | e27db62 | 2006-01-19 01:13:03 -0700 | [diff] [blame^] | 101 | /* Early serial support functions */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | static void __init |
Grant C. Likely | e27db62 | 2006-01-19 01:13:03 -0700 | [diff] [blame^] | 103 | ml300_early_serial_init(int num, struct plat_serial8250_port *pdata) |
| 104 | { |
| 105 | #if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB) |
| 106 | struct uart_port serial_req; |
| 107 | |
| 108 | memset(&serial_req, 0, sizeof(serial_req)); |
| 109 | serial_req.mapbase = pdata->mapbase; |
| 110 | serial_req.membase = pdata->membase; |
| 111 | serial_req.irq = pdata->irq; |
| 112 | serial_req.uartclk = pdata->uartclk; |
| 113 | serial_req.regshift = pdata->regshift; |
| 114 | serial_req.iotype = pdata->iotype; |
| 115 | serial_req.flags = pdata->flags; |
| 116 | gen550_init(num, &serial_req); |
| 117 | #endif |
| 118 | } |
| 119 | |
| 120 | void __init |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | ml300_early_serial_map(void) |
| 122 | { |
| 123 | #ifdef CONFIG_SERIAL_8250 |
Grant C. Likely | e27db62 | 2006-01-19 01:13:03 -0700 | [diff] [blame^] | 124 | struct plat_serial8250_port *pdata; |
| 125 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
Grant C. Likely | e27db62 | 2006-01-19 01:13:03 -0700 | [diff] [blame^] | 127 | pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(VIRTEX_UART); |
| 128 | while(pdata && pdata->flags) |
| 129 | { |
| 130 | pdata->membase = ioremap(pdata->mapbase, 0x100); |
| 131 | ml300_early_serial_init(i, pdata); |
| 132 | pdata++; |
| 133 | i++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | } |
| 135 | #endif /* CONFIG_SERIAL_8250 */ |
| 136 | } |
| 137 | |
| 138 | void __init |
| 139 | ml300_setup_arch(void) |
| 140 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | ml300_early_serial_map(); |
Grant C. Likely | e27db62 | 2006-01-19 01:13:03 -0700 | [diff] [blame^] | 142 | ppc4xx_setup_arch(); /* calls ppc4xx_find_bridges() */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
| 144 | /* Identify the system */ |
| 145 | printk(KERN_INFO "Xilinx Virtex-II Pro port\n"); |
| 146 | printk(KERN_INFO "Port by MontaVista Software, Inc. (source@mvista.com)\n"); |
| 147 | } |
| 148 | |
| 149 | /* Called after board_setup_irq from ppc4xx_init_IRQ(). */ |
| 150 | void __init |
| 151 | ml300_init_irq(void) |
| 152 | { |
| 153 | ppc4xx_init_IRQ(); |
| 154 | } |
| 155 | |
| 156 | void __init |
| 157 | platform_init(unsigned long r3, unsigned long r4, unsigned long r5, |
| 158 | unsigned long r6, unsigned long r7) |
| 159 | { |
| 160 | ppc4xx_init(r3, r4, r5, r6, r7); |
| 161 | |
Grant C. Likely | e27db62 | 2006-01-19 01:13:03 -0700 | [diff] [blame^] | 162 | identify_ppc_sys_by_id(mfspr(SPRN_PVR)); |
| 163 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | ppc_md.setup_arch = ml300_setup_arch; |
| 165 | ppc_md.setup_io_mappings = ml300_map_io; |
| 166 | ppc_md.init_IRQ = ml300_init_irq; |
| 167 | |
| 168 | #if defined(XPAR_POWER_0_POWERDOWN_BASEADDR) |
| 169 | ppc_md.power_off = xilinx_power_off; |
| 170 | #endif |
| 171 | |
| 172 | #ifdef CONFIG_KGDB |
| 173 | ppc_md.early_serial_map = ml300_early_serial_map; |
| 174 | #endif |
| 175 | } |
| 176 | |