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 #include "tsx1x-common.h"
  11
  12 /*
  13  * QNAP TS-x1x Boards flash
  14  */
  15
  16 /****************************************************************************
  17  * 16 MiB NOR flash. The struct mtd_partition is not in the same order as the
  18  *     partitions on the device because we want to keep compatibility with
  19  *     the QNAP firmware.
  20  * Layout as used by QNAP:
  21  *  0x00000000-0x00080000 : "U-Boot"
  22  *  0x00200000-0x00400000 : "Kernel"
  23  *  0x00400000-0x00d00000 : "RootFS"
  24  *  0x00d00000-0x01000000 : "RootFS2"
  25  *  0x00080000-0x000c0000 : "U-Boot Config"
  26  *  0x000c0000-0x00200000 : "NAS Config"
  27  *
  28  * We'll use "RootFS1" instead of "RootFS" to stay compatible with the layout
  29  * used by the QNAP TS-109/TS-209.
  30  *
  31  ***************************************************************************/
  32
  33 static struct mtd_partition qnap_tsx1x_partitions[] = {
  34         {
  35                 .name           = "U-Boot",
  36                 .size           = 0x00080000,
  37                 .offset         = 0,
  38                 .mask_flags     = MTD_WRITEABLE,
  39         }, {
  40                 .name           = "Kernel",
  41                 .size           = 0x00200000,
  42                 .offset         = 0x00200000,
  43         }, {
  44                 .name           = "RootFS1",
  45                 .size           = 0x00900000,
  46                 .offset         = 0x00400000,
  47         }, {
  48                 .name           = "RootFS2",
  49                 .size           = 0x00300000,
  50                 .offset         = 0x00d00000,
  51         }, {
  52                 .name           = "U-Boot Config",
  53                 .size           = 0x00040000,
  54                 .offset         = 0x00080000,
  55         }, {
  56                 .name           = "NAS Config",
  57                 .size           = 0x00140000,
  58                 .offset         = 0x000c0000,
  59         },
  60 };
  61
  62 static const struct flash_platform_data qnap_tsx1x_flash = {
  63         .type           = "m25p128",
  64         .name           = "spi_flash",
  65         .parts          = qnap_tsx1x_partitions,
  66         .nr_parts       = ARRAY_SIZE(qnap_tsx1x_partitions),
  67 };
  68
  69 static struct spi_board_info __initdata qnap_tsx1x_spi_slave_info[] = {
  70         {
  71                 .modalias       = "m25p80",
  72                 .platform_data  = &qnap_tsx1x_flash,
  73                 .irq            = -1,
  74                 .max_speed_hz   = 20000000,
  75                 .bus_num        = 0,
  76                 .chip_select    = 0,
  77         },
  78 };
  79
  80 void __init qnap_tsx1x_register_flash(void)
  81 {
  82         spi_register_board_info(qnap_tsx1x_spi_slave_info,
  83                                 ARRAY_SIZE(qnap_tsx1x_spi_slave_info));
  84         kirkwood_spi_init();
  85 }
  86
  87
  88 /*****************************************************************************
  89  * QNAP TS-x1x specific power off method via UART1-attached PIC
  90  ****************************************************************************/
  91
  92 #define UART1_REG(x)    (UART1_VIRT_BASE + ((UART_##x) << 2))
  93
  94 void qnap_tsx1x_power_off(void)
  95 {
  96         /* 19200 baud divisor */
  97         const unsigned divisor = ((kirkwood_tclk + (8 * 19200)) / (16 * 19200));
  98
  99         pr_info("%s: triggering power-off...\n", __func__);
 100
 101         /* hijack UART1 and reset into sane state (19200,8n1) */
 102         writel(0x83, UART1_REG(LCR));
 103         writel(divisor & 0xff, UART1_REG(DLL));
 104         writel((divisor >> 8) & 0xff, UART1_REG(DLM));
 105         writel(0x03, UART1_REG(LCR));
 106         writel(0x00, UART1_REG(IER));
 107         writel(0x00, UART1_REG(FCR));
 108         writel(0x00, UART1_REG(MCR));
 109
 110         /* send the power-off command 'A' to PIC */
 111         writel('A', UART1_REG(TX));
 112 }
 113