arch/x86/include/asm/olpc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* OLPC machine specific definitions */
   3
   4 #ifndef _ASM_X86_OLPC_H
   5 #define _ASM_X86_OLPC_H
   6
   7 #include <asm/geode.h>
   8
   9 struct olpc_platform_t {
  10         int flags;
  11         uint32_t boardrev;
  12 };
  13
  14 #define OLPC_F_PRESENT          0x01
  15 #define OLPC_F_DCON             0x02
  16
  17 #ifdef CONFIG_OLPC
  18
  19 extern struct olpc_platform_t olpc_platform_info;
  20
  21 /*
  22  * OLPC board IDs contain the major build number within the mask 0x0ff0,
  23  * and the minor build number within 0x000f.  Pre-builds have a minor
  24  * number less than 8, and normal builds start at 8.  For example, 0x0B10
  25  * is a PreB1, and 0x0C18 is a C1.
  26  */
  27
  28 static inline uint32_t olpc_board(uint8_t id)
  29 {
  30         return (id << 4) | 0x8;
  31 }
  32
  33 static inline uint32_t olpc_board_pre(uint8_t id)
  34 {
  35         return id << 4;
  36 }
  37
  38 static inline int machine_is_olpc(void)
  39 {
  40         return (olpc_platform_info.flags & OLPC_F_PRESENT) ? 1 : 0;
  41 }
  42
  43 /*
  44  * The DCON is OLPC's Display Controller.  It has a number of unique
  45  * features that we might want to take advantage of..
  46  */
  47 static inline int olpc_has_dcon(void)
  48 {
  49         return (olpc_platform_info.flags & OLPC_F_DCON) ? 1 : 0;
  50 }
  51
  52 /*
  53  * The "Mass Production" version of OLPC's XO is identified as being model
  54  * C2.  During the prototype phase, the following models (in chronological
  55  * order) were created: A1, B1, B2, B3, B4, C1.  The A1 through B2 models
  56  * were based on Geode GX CPUs, and models after that were based upon
  57  * Geode LX CPUs.  There were also some hand-assembled models floating
  58  * around, referred to as PreB1, PreB2, etc.
  59  */
  60 static inline int olpc_board_at_least(uint32_t rev)
  61 {
  62         return olpc_platform_info.boardrev >= rev;
  63 }
  64
  65 #else
  66
  67 static inline int machine_is_olpc(void)
  68 {
  69         return 0;
  70 }
  71
  72 static inline int olpc_has_dcon(void)
  73 {
  74         return 0;
  75 }
  76
  77 #endif
  78
  79 #ifdef CONFIG_OLPC_XO1_PM
  80 extern void do_olpc_suspend_lowlevel(void);
  81 extern void olpc_xo1_pm_wakeup_set(u16 value);
  82 extern void olpc_xo1_pm_wakeup_clear(u16 value);
  83 #endif
  84
  85 extern int pci_olpc_init(void);
  86
  87 /* GPIO assignments */
  88
  89 #define OLPC_GPIO_MIC_AC        1
  90 #define OLPC_GPIO_DCON_STAT0    5
  91 #define OLPC_GPIO_DCON_STAT1    6
  92 #define OLPC_GPIO_DCON_IRQ      7
  93 #define OLPC_GPIO_THRM_ALRM     geode_gpio(10)
  94 #define OLPC_GPIO_DCON_LOAD    11
  95 #define OLPC_GPIO_DCON_BLANK   12
  96 #define OLPC_GPIO_SMB_CLK      14
  97 #define OLPC_GPIO_SMB_DATA     15
  98 #define OLPC_GPIO_WORKAUX       geode_gpio(24)
  99 #define OLPC_GPIO_LID           26
 100 #define OLPC_GPIO_ECSCI         27
 101
 102 #endif /* _ASM_X86_OLPC_H */