// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2015-2018, Intel Corporation. */ #define pr_fmt(fmt) … #include <linux/atomic.h> #include <linux/errno.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/irq.h> #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/platform_device.h> #include <linux/poll.h> #include <linux/regmap.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/timer.h> #include "kcs_bmc_device.h" #define DEVICE_NAME … #define KCS_CHANNEL_MAX … /* * Field class descriptions * * LPCyE Enable LPC channel y * IBFIEy Input Buffer Full IRQ Enable for LPC channel y * IRQxEy Assert SerIRQ x for LPC channel y (Deprecated, use IDyIRQX, IRQXEy) * IDyIRQX Use the specified 4-bit SerIRQ for LPC channel y * SELyIRQX SerIRQ polarity for LPC channel y (low: 0, high: 1) * IRQXEy Assert the SerIRQ specified in IDyIRQX for LPC channel y */ #define LPC_TYIRQX_LOW … #define LPC_TYIRQX_HIGH … #define LPC_TYIRQX_RSVD … #define LPC_TYIRQX_RISING … #define LPC_HICR0 … #define LPC_HICR0_LPC3E … #define LPC_HICR0_LPC2E … #define LPC_HICR0_LPC1E … #define LPC_HICR2 … #define LPC_HICR2_IBFIE3 … #define LPC_HICR2_IBFIE2 … #define LPC_HICR2_IBFIE1 … #define LPC_HICR4 … #define LPC_HICR4_LADR12AS … #define LPC_HICR4_KCSENBL … #define LPC_SIRQCR0 … /* IRQ{12,1}E1 are deprecated as of AST2600 A3 but necessary for prior chips */ #define LPC_SIRQCR0_IRQ12E1 … #define LPC_SIRQCR0_IRQ1E1 … #define LPC_HICR5 … #define LPC_HICR5_ID3IRQX_MASK … #define LPC_HICR5_ID3IRQX_SHIFT … #define LPC_HICR5_ID2IRQX_MASK … #define LPC_HICR5_ID2IRQX_SHIFT … #define LPC_HICR5_SEL3IRQX … #define LPC_HICR5_IRQXE3 … #define LPC_HICR5_SEL2IRQX … #define LPC_HICR5_IRQXE2 … #define LPC_LADR3H … #define LPC_LADR3L … #define LPC_LADR12H … #define LPC_LADR12L … #define LPC_IDR1 … #define LPC_IDR2 … #define LPC_IDR3 … #define LPC_ODR1 … #define LPC_ODR2 … #define LPC_ODR3 … #define LPC_STR1 … #define LPC_STR2 … #define LPC_STR3 … #define LPC_HICRB … #define LPC_HICRB_EN16LADR2 … #define LPC_HICRB_EN16LADR1 … #define LPC_HICRB_IBFIE4 … #define LPC_HICRB_LPC4E … #define LPC_HICRC … #define LPC_HICRC_ID4IRQX_MASK … #define LPC_HICRC_ID4IRQX_SHIFT … #define LPC_HICRC_TY4IRQX_MASK … #define LPC_HICRC_TY4IRQX_SHIFT … #define LPC_HICRC_OBF4_AUTO_CLR … #define LPC_HICRC_IRQXE4 … #define LPC_LADR4 … #define LPC_IDR4 … #define LPC_ODR4 … #define LPC_STR4 … #define LPC_LSADR12 … #define LPC_LSADR12_LSADR2_MASK … #define LPC_LSADR12_LSADR2_SHIFT … #define LPC_LSADR12_LSADR1_MASK … #define LPC_LSADR12_LSADR1_SHIFT … #define OBE_POLL_PERIOD … enum aspeed_kcs_irq_mode { … }; struct aspeed_kcs_bmc { … }; static inline struct aspeed_kcs_bmc *to_aspeed_kcs_bmc(struct kcs_bmc_device *kcs_bmc) { … } static u8 aspeed_kcs_inb(struct kcs_bmc_device *kcs_bmc, u32 reg) { … } static void aspeed_kcs_outb(struct kcs_bmc_device *kcs_bmc, u32 reg, u8 data) { … } static void aspeed_kcs_updateb(struct kcs_bmc_device *kcs_bmc, u32 reg, u8 mask, u8 val) { … } /* * We note D for Data, and C for Cmd/Status, default rules are * * 1. Only the D address is given: * A. KCS1/KCS2 (D/C: X/X+4) * D/C: CA0h/CA4h * D/C: CA8h/CACh * B. KCS3 (D/C: XX2/XX3h) * D/C: CA2h/CA3h * C. KCS4 (D/C: X/X+1) * D/C: CA4h/CA5h * * 2. Both the D/C addresses are given: * A. KCS1/KCS2/KCS4 (D/C: X/Y) * D/C: CA0h/CA1h * D/C: CA8h/CA9h * D/C: CA4h/CA5h * B. KCS3 (D/C: XX2/XX3h) * D/C: CA2h/CA3h */ static int aspeed_kcs_set_address(struct kcs_bmc_device *kcs_bmc, u32 addrs[2], int nr_addrs) { … } static inline int aspeed_kcs_map_serirq_type(u32 dt_type) { … } static int aspeed_kcs_config_upstream_irq(struct aspeed_kcs_bmc *priv, u32 id, u32 dt_type) { … } static void aspeed_kcs_enable_channel(struct kcs_bmc_device *kcs_bmc, bool enable) { … } static void aspeed_kcs_check_obe(struct timer_list *timer) { … } static void aspeed_kcs_irq_mask_update(struct kcs_bmc_device *kcs_bmc, u8 mask, u8 state) { … } static const struct kcs_bmc_device_ops aspeed_kcs_ops = …; static irqreturn_t aspeed_kcs_irq(int irq, void *arg) { … } static int aspeed_kcs_config_downstream_irq(struct kcs_bmc_device *kcs_bmc, struct platform_device *pdev) { … } static const struct kcs_ioreg ast_kcs_bmc_ioregs[KCS_CHANNEL_MAX] = …; static int aspeed_kcs_of_get_channel(struct platform_device *pdev) { … } static int aspeed_kcs_of_get_io_address(struct platform_device *pdev, u32 addrs[2]) { … } static int aspeed_kcs_probe(struct platform_device *pdev) { … } static void aspeed_kcs_remove(struct platform_device *pdev) { … } static const struct of_device_id ast_kcs_bmc_match[] = …; MODULE_DEVICE_TABLE(of, ast_kcs_bmc_match); static struct platform_driver ast_kcs_bmc_driver = …; module_platform_driver(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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