arch/arm/mach-kirkwood/tsx1x-common.c

   1 #include <linux/kernel.h>
   2 #include <linux/pci.h>
   3 #include <linux/platform_device.h>
   4 #include <linux/mtd/physmap.h>
   5 #include <linux/spi/flash.h>
   6 #include <linux/spi/spi.h>
   7 #include <linux/serial_reg.h>
   8 #include <mach/kirkwood.h>
   9 #include "common.h"
  10
  11 /*
  12  * QNAP TS-x1x Boards flash
  13  */
  14
  15 /****************************************************************************
  16  * 16 MiB NOR flash. The struct mtd_partition is not in the same order as the
  17  *     partitions on the device because we want to keep compatibility with
  18  *     the QNAP firmware.
  19  * Layout as used by QNAP:
  20  *  0x00000000-0x00080000 : "U-Boot"
  21  *  0x00200000-0x00400000 : "Kernel"
  22  *  0x00400000-0x00d00000 : "RootFS"
  23  *  0x00d00000-0x01000000 : "RootFS2"
  24  *  0x00080000-0x000c0000 : "U-Boot Config"
  25  *  0x000c0000-0x00200000 : "NAS Config"
  26  *
  27  * We'll use "RootFS1" instead of "RootFS" to stay compatible with the layout
  28  * used by the QNAP TS-109/TS-209.
  29  *
  30  ***************************************************************************/
  31
  32 struct mtd_partition qnap_tsx1x_partitions[] = {
  33         {
  34                 .name           = "U-Boot",
  35                 .size           = 0x00080000,
  36                 .offset         = 0,
  37                 .mask_flags     = MTD_WRITEABLE,
  38         }, {
  39                 .name           = "Kernel",
  40                 .size           = 0x00200000,
  41                 .offset         = 0x00200000,
  42         }, {
  43                 .name           = "RootFS1",
  44                 .size           = 0x00900000,
  45                 .offset         = 0x00400000,
  46         }, {
  47                 .name           = "RootFS2",
  48                 .size           = 0x00300000,
  49                 .offset         = 0x00d00000,
  50         }, {
  51                 .name           = "U-Boot Config",
  52                 .size           = 0x00040000,
  53                 .offset         = 0x00080000,
  54         }, {
  55                 .name           = "NAS Config",
  56                 .size           = 0x00140000,
  57                 .offset         = 0x000c0000,
  58         },
  59 };
  60
  61 const struct flash_platform_data qnap_tsx1x_flash = {
  62         .type           = "m25p128",
  63         .name           = "spi_flash",
  64         .parts          = qnap_tsx1x_partitions,
  65         .nr_parts       = ARRAY_SIZE(qnap_tsx1x_partitions),
  66 };
  67
  68 struct spi_board_info __initdata qnap_tsx1x_spi_slave_info[] = {
  69         {
  70                 .modalias       = "m25p80",
  71                 .platform_data  = &qnap_tsx1x_flash,
  72                 .irq            = -1,
  73                 .max_speed_hz   = 20000000,
  74                 .bus_num        = 0,
  75                 .chip_select    = 0,
  76         },
  77 };
  78
  79 void __init qnap_tsx1x_register_flash(void)
  80 {
  81         spi_register_board_info(qnap_tsx1x_spi_slave_info,
  82                                 ARRAY_SIZE(qnap_tsx1x_spi_slave_info));
  83         kirkwood_spi_init();
  84 }
  85
  86
  87 /*****************************************************************************
  88  * QNAP TS-x1x specific power off method via UART1-attached PIC
  89  ****************************************************************************/
  90
  91 #define UART1_REG(x)    (UART1_VIRT_BASE + ((UART_##x) << 2))
  92
  93 void qnap_tsx1x_power_off(void)
  94 {
  95         /* 19200 baud divisor */
  96         const unsigned divisor = ((kirkwood_tclk + (8 * 19200)) / (16 * 19200));
  97
  98         pr_info("%s: triggering power-off...\n", __func__);
  99
 100         /* hijack UART1 and reset into sane state (19200,8n1) */
 101         writel(0x83, UART1_REG(LCR));
 102         writel(divisor & 0xff, UART1_REG(DLL));
 103         writel((divisor >> 8) & 0xff, UART1_REG(DLM));
 104         writel(0x03, UART1_REG(LCR));
 105         writel(0x00, UART1_REG(IER));
 106         writel(0x00, UART1_REG(FCR));
 107         writel(0x00, UART1_REG(MCR));
 108
 109         /* send the power-off command 'A' to PIC */
 110         writel('A', UART1_REG(TX));
 111 }
 112