arch/arm/mach-cns3xxx/cns3420vb.c

   1 /*
   2  * Cavium Networks CNS3420 Validation Board
   3  *
   4  * Copyright 2000 Deep Blue Solutions Ltd
   5  * Copyright 2008 ARM Limited
   6  * Copyright 2008 Cavium Networks
   7  *                Scott Shu
   8  * Copyright 2010 MontaVista Software, LLC.
   9  *                Anton Vorontsov <avorontsov@mvista.com>
  10  *
  11  * This file is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License, Version 2, as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/kernel.h>
  18 #include <linux/compiler.h>
  19 #include <linux/io.h>
  20 #include <linux/dma-mapping.h>
  21 #include <linux/serial_core.h>
  22 #include <linux/serial_8250.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/mtd/mtd.h>
  25 #include <linux/mtd/physmap.h>
  26 #include <linux/mtd/partitions.h>
  27 #include <linux/usb/ehci_pdriver.h>
  28 #include <linux/usb/ohci_pdriver.h>
  29 #include <asm/setup.h>
  30 #include <asm/mach-types.h>
  31 #include <asm/mach/arch.h>
  32 #include <asm/mach/map.h>
  33 #include <asm/mach/time.h>
  34 #include "cns3xxx.h"
  35 #include "pm.h"
  36 #include "core.h"
  37 #include "devices.h"
  38
  39 /*
  40  * NOR Flash
  41  */
  42 static struct mtd_partition cns3420_nor_partitions[] = {
  43         {
  44                 .name           = "uboot",
  45                 .size           = 0x00040000,
  46                 .offset         = 0,
  47                 .mask_flags     = MTD_WRITEABLE,
  48         }, {
  49                 .name           = "kernel",
  50                 .size           = 0x004C0000,
  51                 .offset         = MTDPART_OFS_APPEND,
  52         }, {
  53                 .name           = "filesystem",
  54                 .size           = 0x7000000,
  55                 .offset         = MTDPART_OFS_APPEND,
  56         }, {
  57                 .name           = "filesystem2",
  58                 .size           = 0x0AE0000,
  59                 .offset         = MTDPART_OFS_APPEND,
  60         }, {
  61                 .name           = "ubootenv",
  62                 .size           = MTDPART_SIZ_FULL,
  63                 .offset         = MTDPART_OFS_APPEND,
  64         },
  65 };
  66
  67 static struct physmap_flash_data cns3420_nor_pdata = {
  68         .width = 2,
  69         .parts = cns3420_nor_partitions,
  70         .nr_parts = ARRAY_SIZE(cns3420_nor_partitions),
  71 };
  72
  73 static struct resource cns3420_nor_res = {
  74         .start = CNS3XXX_FLASH_BASE,
  75         .end = CNS3XXX_FLASH_BASE + SZ_128M - 1,
  76         .flags = IORESOURCE_MEM | IORESOURCE_MEM_32BIT,
  77 };
  78
  79 static struct platform_device cns3420_nor_pdev = {
  80         .name = "physmap-flash",
  81         .id = 0,
  82         .resource = &cns3420_nor_res,
  83         .num_resources = 1,
  84         .dev = {
  85                 .platform_data = &cns3420_nor_pdata,
  86         },
  87 };
  88
  89 /*
  90  * UART
  91  */
  92 static void __init cns3420_early_serial_setup(void)
  93 {
  94 #ifdef CONFIG_SERIAL_8250_CONSOLE
  95         static struct uart_port cns3420_serial_port = {
  96                 .membase        = (void __iomem *)CNS3XXX_UART0_BASE_VIRT,
  97                 .mapbase        = CNS3XXX_UART0_BASE,
  98                 .irq            = IRQ_CNS3XXX_UART0,
  99                 .iotype         = UPIO_MEM,
 100                 .flags          = UPF_BOOT_AUTOCONF | UPF_FIXED_TYPE,
 101                 .regshift       = 2,
 102                 .uartclk        = 24000000,
 103                 .line           = 0,
 104                 .type           = PORT_16550A,
 105                 .fifosize       = 16,
 106         };
 107
 108         early_serial_setup(&cns3420_serial_port);
 109 #endif
 110 }
 111
 112 /*
 113  * USB
 114  */
 115 static struct resource cns3xxx_usb_ehci_resources[] = {
 116         [0] = {
 117                 .start = CNS3XXX_USB_BASE,
 118                 .end   = CNS3XXX_USB_BASE + SZ_16M - 1,
 119                 .flags = IORESOURCE_MEM,
 120         },
 121         [1] = {
 122                 .start = IRQ_CNS3XXX_USB_EHCI,
 123                 .flags = IORESOURCE_IRQ,
 124         },
 125 };
 126
 127 static u64 cns3xxx_usb_ehci_dma_mask = DMA_BIT_MASK(32);
 128
 129 static int csn3xxx_usb_power_on(struct platform_device *pdev)
 130 {
 131         /*
 132          * EHCI and OHCI share the same clock and power,
 133          * resetting twice would cause the 1st controller been reset.
 134          * Therefore only do power up  at the first up device, and
 135          * power down at the last down device.
 136          *
 137          * Set USB AHB INCR length to 16
 138          */
 139         if (atomic_inc_return(&usb_pwr_ref) == 1) {
 140                 cns3xxx_pwr_power_up(1 << PM_PLL_HM_PD_CTRL_REG_OFFSET_PLL_USB);
 141                 cns3xxx_pwr_clk_en(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST);
 142                 cns3xxx_pwr_soft_rst(1 << PM_SOFT_RST_REG_OFFST_USB_HOST);
 143                 __raw_writel((__raw_readl(MISC_CHIP_CONFIG_REG) | (0X2 << 24)),
 144                         MISC_CHIP_CONFIG_REG);
 145         }
 146
 147         return 0;
 148 }
 149
 150 static void csn3xxx_usb_power_off(struct platform_device *pdev)
 151 {
 152         /*
 153          * EHCI and OHCI share the same clock and power,
 154          * resetting twice would cause the 1st controller been reset.
 155          * Therefore only do power up  at the first up device, and
 156          * power down at the last down device.
 157          */
 158         if (atomic_dec_return(&usb_pwr_ref) == 0)
 159                 cns3xxx_pwr_clk_dis(1 << PM_CLK_GATE_REG_OFFSET_USB_HOST);
 160 }
 161
 162 static struct usb_ehci_pdata cns3xxx_usb_ehci_pdata = {
 163         .power_on       = csn3xxx_usb_power_on,
 164         .power_off      = csn3xxx_usb_power_off,
 165 };
 166
 167 static struct platform_device cns3xxx_usb_ehci_device = {
 168         .name          = "ehci-platform",
 169         .num_resources = ARRAY_SIZE(cns3xxx_usb_ehci_resources),
 170         .resource      = cns3xxx_usb_ehci_resources,
 171         .dev           = {
 172                 .dma_mask          = &cns3xxx_usb_ehci_dma_mask,
 173                 .coherent_dma_mask = DMA_BIT_MASK(32),
 174                 .platform_data     = &cns3xxx_usb_ehci_pdata,
 175         },
 176 };
 177
 178 static struct resource cns3xxx_usb_ohci_resources[] = {
 179         [0] = {
 180                 .start = CNS3XXX_USB_OHCI_BASE,
 181                 .end   = CNS3XXX_USB_OHCI_BASE + SZ_16M - 1,
 182                 .flags = IORESOURCE_MEM,
 183         },
 184         [1] = {
 185                 .start = IRQ_CNS3XXX_USB_OHCI,
 186                 .flags = IORESOURCE_IRQ,
 187         },
 188 };
 189
 190 static u64 cns3xxx_usb_ohci_dma_mask = DMA_BIT_MASK(32);
 191
 192 static struct usb_ohci_pdata cns3xxx_usb_ohci_pdata = {
 193         .num_ports      = 1,
 194         .power_on       = csn3xxx_usb_power_on,
 195         .power_off      = csn3xxx_usb_power_off,
 196 };
 197
 198 static struct platform_device cns3xxx_usb_ohci_device = {
 199         .name          = "ohci-platform",
 200         .num_resources = ARRAY_SIZE(cns3xxx_usb_ohci_resources),
 201         .resource      = cns3xxx_usb_ohci_resources,
 202         .dev           = {
 203                 .dma_mask          = &cns3xxx_usb_ohci_dma_mask,
 204                 .coherent_dma_mask = DMA_BIT_MASK(32),
 205                 .platform_data     = &cns3xxx_usb_ohci_pdata,
 206         },
 207 };
 208
 209 /*
 210  * Initialization
 211  */
 212 static struct platform_device *cns3420_pdevs[] __initdata = {
 213         &cns3420_nor_pdev,
 214         &cns3xxx_usb_ehci_device,
 215         &cns3xxx_usb_ohci_device,
 216 };
 217
 218 static void __init cns3420_init(void)
 219 {
 220         cns3xxx_l2x0_init();
 221
 222         platform_add_devices(cns3420_pdevs, ARRAY_SIZE(cns3420_pdevs));
 223
 224         cns3xxx_ahci_init();
 225         cns3xxx_sdhci_init();
 226
 227         pm_power_off = cns3xxx_power_off;
 228 }
 229
 230 static struct map_desc cns3420_io_desc[] __initdata = {
 231         {
 232                 .virtual        = CNS3XXX_UART0_BASE_VIRT,
 233                 .pfn            = __phys_to_pfn(CNS3XXX_UART0_BASE),
 234                 .length         = SZ_4K,
 235                 .type           = MT_DEVICE,
 236         },
 237 };
 238
 239 static void __init cns3420_map_io(void)
 240 {
 241         cns3xxx_map_io();
 242         iotable_init(cns3420_io_desc, ARRAY_SIZE(cns3420_io_desc));
 243
 244         cns3420_early_serial_setup();
 245 }
 246
 247 MACHINE_START(CNS3420VB, "Cavium Networks CNS3420 Validation Board")
 248         .atag_offset    = 0x100,
 249         .nr_irqs        = NR_IRQS_CNS3XXX,
 250         .map_io         = cns3420_map_io,
 251         .init_irq       = cns3xxx_init_irq,
 252         .init_time      = cns3xxx_timer_init,
 253         .init_machine   = cns3420_init,
 254         .restart        = cns3xxx_restart,
 255 MACHINE_END