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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3ef0e1f8ca
This adds support for OLPC XO hardware. Open Firmware on XOs don't contain the VSA, so it is necessary to emulate the PCI BARs in the kernel. This also adds functionality for running EC commands, and a CONFIG_OLPC. A number of OLPC drivers depend upon CONFIG_OLPC. olpc_ec_timeout is a hack to work around Embedded Controller bugs. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: geode_has_vsa build fix] [akpm@linux-foundation.org: olpc_register_battery_callback doesn't exist] Signed-off-by: Andres Salomon <dilinger@debian.org> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andi Kleen <ak@suse.de> Cc: Jordan Crouse <jordan.crouse@amd.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
133 lines
3.0 KiB
C
133 lines
3.0 KiB
C
/* OLPC machine specific definitions */
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#ifndef ASM_OLPC_H_
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#define ASM_OLPC_H_
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#include <asm/geode.h>
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struct olpc_platform_t {
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int flags;
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uint32_t boardrev;
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int ecver;
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};
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#define OLPC_F_PRESENT 0x01
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#define OLPC_F_DCON 0x02
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#define OLPC_F_VSA 0x04
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#ifdef CONFIG_OLPC
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extern struct olpc_platform_t olpc_platform_info;
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/*
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* OLPC board IDs contain the major build number within the mask 0x0ff0,
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* and the minor build number withing 0x000f. Pre-builds have a minor
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* number less than 8, and normal builds start at 8. For example, 0x0B10
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* is a PreB1, and 0x0C18 is a C1.
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*/
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static inline uint32_t olpc_board(uint8_t id)
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{
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return (id << 4) | 0x8;
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}
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static inline uint32_t olpc_board_pre(uint8_t id)
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{
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return id << 4;
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}
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static inline int machine_is_olpc(void)
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{
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return (olpc_platform_info.flags & OLPC_F_PRESENT) ? 1 : 0;
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}
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/*
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* The DCON is OLPC's Display Controller. It has a number of unique
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* features that we might want to take advantage of..
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*/
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static inline int olpc_has_dcon(void)
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{
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return (olpc_platform_info.flags & OLPC_F_DCON) ? 1 : 0;
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}
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/*
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* The VSA is software from AMD that typical Geode bioses will include.
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* It is used to emulate the PCI bus, VGA, etc. OLPC's Open Firmware does
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* not include the VSA; instead, PCI is emulated by the kernel.
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*
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* The VSA is described further in arch/x86/pci/olpc.c.
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*/
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static inline int olpc_has_vsa(void)
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{
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return (olpc_platform_info.flags & OLPC_F_VSA) ? 1 : 0;
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}
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/*
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* The "Mass Production" version of OLPC's XO is identified as being model
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* C2. During the prototype phase, the following models (in chronological
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* order) were created: A1, B1, B2, B3, B4, C1. The A1 through B2 models
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* were based on Geode GX CPUs, and models after that were based upon
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* Geode LX CPUs. There were also some hand-assembled models floating
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* around, referred to as PreB1, PreB2, etc.
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*/
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static inline int olpc_board_at_least(uint32_t rev)
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{
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return olpc_platform_info.boardrev >= rev;
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}
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#else
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static inline int machine_is_olpc(void)
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{
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return 0;
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}
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static inline int olpc_has_dcon(void)
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{
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return 0;
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}
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static inline int olpc_has_vsa(void)
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{
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return 0;
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}
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#endif
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/* EC related functions */
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extern int olpc_ec_cmd(unsigned char cmd, unsigned char *inbuf, size_t inlen,
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unsigned char *outbuf, size_t outlen);
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extern int olpc_ec_mask_set(uint8_t bits);
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extern int olpc_ec_mask_unset(uint8_t bits);
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/* EC commands */
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#define EC_FIRMWARE_REV 0x08
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/* SCI source values */
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#define EC_SCI_SRC_EMPTY 0x00
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#define EC_SCI_SRC_GAME 0x01
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#define EC_SCI_SRC_BATTERY 0x02
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#define EC_SCI_SRC_BATSOC 0x04
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#define EC_SCI_SRC_BATERR 0x08
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#define EC_SCI_SRC_EBOOK 0x10
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#define EC_SCI_SRC_WLAN 0x20
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#define EC_SCI_SRC_ACPWR 0x40
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#define EC_SCI_SRC_ALL 0x7F
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/* GPIO assignments */
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#define OLPC_GPIO_MIC_AC geode_gpio(1)
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#define OLPC_GPIO_DCON_IRQ geode_gpio(7)
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#define OLPC_GPIO_THRM_ALRM geode_gpio(10)
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#define OLPC_GPIO_SMB_CLK geode_gpio(14)
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#define OLPC_GPIO_SMB_DATA geode_gpio(15)
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#define OLPC_GPIO_WORKAUX geode_gpio(24)
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#define OLPC_GPIO_LID geode_gpio(26)
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#define OLPC_GPIO_ECSCI geode_gpio(27)
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#endif
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