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The BPMP firmware, found on Tegra186 and later, provides an ABI that can be used to enable and disable power to several power partitions in Tegra SoCs. The ABI allows for enumeration of the available power partitions, so the driver can be reused on future generations, provided the BPMP ABI remains stable. Based on work by Stefan Kristiansson <stefank@nvidia.com> and Mikko Perttunen <mperttunen@nvidia.com>. Signed-off-by: Thierry Reding <treding@nvidia.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
153 lines
3.3 KiB
C
153 lines
3.3 KiB
C
/*
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* Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#ifndef __SOC_TEGRA_BPMP_H
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#define __SOC_TEGRA_BPMP_H
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#include <linux/mailbox_client.h>
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#include <linux/pm_domain.h>
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#include <linux/reset-controller.h>
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#include <linux/semaphore.h>
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#include <linux/types.h>
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#include <soc/tegra/bpmp-abi.h>
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struct tegra_bpmp_clk;
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struct tegra_bpmp_soc {
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struct {
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struct {
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unsigned int offset;
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unsigned int count;
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unsigned int timeout;
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} cpu_tx, thread, cpu_rx;
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} channels;
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unsigned int num_resets;
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};
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struct tegra_bpmp_mb_data {
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u32 code;
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u32 flags;
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u8 data[MSG_DATA_MIN_SZ];
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} __packed;
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struct tegra_bpmp_channel {
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struct tegra_bpmp *bpmp;
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struct tegra_bpmp_mb_data *ib;
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struct tegra_bpmp_mb_data *ob;
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struct completion completion;
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struct tegra_ivc *ivc;
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};
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typedef void (*tegra_bpmp_mrq_handler_t)(unsigned int mrq,
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struct tegra_bpmp_channel *channel,
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void *data);
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struct tegra_bpmp_mrq {
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struct list_head list;
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unsigned int mrq;
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tegra_bpmp_mrq_handler_t handler;
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void *data;
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};
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struct tegra_bpmp {
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const struct tegra_bpmp_soc *soc;
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struct device *dev;
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struct {
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struct gen_pool *pool;
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dma_addr_t phys;
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void *virt;
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} tx, rx;
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struct {
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struct mbox_client client;
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struct mbox_chan *channel;
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} mbox;
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struct tegra_bpmp_channel *channels;
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unsigned int num_channels;
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struct {
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unsigned long *allocated;
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unsigned long *busy;
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unsigned int count;
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struct semaphore lock;
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} threaded;
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struct list_head mrqs;
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spinlock_t lock;
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struct tegra_bpmp_clk **clocks;
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unsigned int num_clocks;
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struct reset_controller_dev rstc;
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struct genpd_onecell_data genpd;
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};
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struct tegra_bpmp *tegra_bpmp_get(struct device *dev);
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void tegra_bpmp_put(struct tegra_bpmp *bpmp);
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struct tegra_bpmp_message {
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unsigned int mrq;
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struct {
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const void *data;
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size_t size;
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} tx;
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struct {
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void *data;
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size_t size;
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} rx;
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};
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int tegra_bpmp_transfer_atomic(struct tegra_bpmp *bpmp,
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struct tegra_bpmp_message *msg);
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int tegra_bpmp_transfer(struct tegra_bpmp *bpmp,
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struct tegra_bpmp_message *msg);
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int tegra_bpmp_request_mrq(struct tegra_bpmp *bpmp, unsigned int mrq,
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tegra_bpmp_mrq_handler_t handler, void *data);
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void tegra_bpmp_free_mrq(struct tegra_bpmp *bpmp, unsigned int mrq,
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void *data);
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#if IS_ENABLED(CONFIG_CLK_TEGRA_BPMP)
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int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp);
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#else
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static inline int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp)
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{
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return 0;
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}
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#endif
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#if IS_ENABLED(CONFIG_RESET_TEGRA_BPMP)
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int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp);
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#else
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static inline int tegra_bpmp_init_resets(struct tegra_bpmp *bpmp)
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{
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return 0;
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}
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#endif
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#if IS_ENABLED(CONFIG_SOC_TEGRA_POWERGATE_BPMP)
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int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp);
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#else
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static inline int tegra_bpmp_init_powergates(struct tegra_bpmp *bpmp)
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{
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return 0;
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}
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#endif
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#endif /* __SOC_TEGRA_BPMP_H */
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