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a1a0bec593
These files are built off of a tristate Kconfig option and also contain modular function calls so they should explicitly include module.h to avoid compile breakage during header shuffles done in the future. We change the one header file wich gives us coverage on both files: drivers/hsi/controllers/omap_ssi.c drivers/hsi/controllers/omap_ssi_port.c Cc: Sebastian Reichel <sre@kernel.org> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
167 lines
5.1 KiB
C
167 lines
5.1 KiB
C
/* OMAP SSI internal interface.
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*
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* Copyright (C) 2010 Nokia Corporation. All rights reserved.
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* Copyright (C) 2013 Sebastian Reichel
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*
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* Contact: Carlos Chinea <carlos.chinea@nokia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms 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 that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifndef __LINUX_HSI_OMAP_SSI_H__
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#define __LINUX_HSI_OMAP_SSI_H__
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/hsi/hsi.h>
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#include <linux/gpio.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#define SSI_MAX_CHANNELS 8
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#define SSI_MAX_GDD_LCH 8
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#define SSI_BYTES_TO_FRAMES(x) ((((x) - 1) >> 2) + 1)
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/**
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* struct omap_ssm_ctx - OMAP synchronous serial module (TX/RX) context
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* @mode: Bit transmission mode
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* @channels: Number of channels
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* @framesize: Frame size in bits
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* @timeout: RX frame timeout
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* @divisor: TX divider
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* @arb_mode: Arbitration mode for TX frame (Round robin, priority)
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*/
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struct omap_ssm_ctx {
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u32 mode;
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u32 channels;
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u32 frame_size;
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union {
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u32 timeout; /* Rx Only */
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struct {
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u32 arb_mode;
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u32 divisor;
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}; /* Tx only */
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};
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};
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/**
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* struct omap_ssi_port - OMAP SSI port data
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* @dev: device associated to the port (HSI port)
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* @pdev: platform device associated to the port
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* @sst_dma: SSI transmitter physical base address
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* @ssr_dma: SSI receiver physical base address
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* @sst_base: SSI transmitter base address
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* @ssr_base: SSI receiver base address
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* @wk_lock: spin lock to serialize access to the wake lines
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* @lock: Spin lock to serialize access to the SSI port
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* @channels: Current number of channels configured (1,2,4 or 8)
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* @txqueue: TX message queues
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* @rxqueue: RX message queues
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* @brkqueue: Queue of incoming HWBREAK requests (FRAME mode)
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* @irq: IRQ number
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* @wake_irq: IRQ number for incoming wake line (-1 if none)
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* @wake_gpio: GPIO number for incoming wake line (-1 if none)
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* @pio_tasklet: Bottom half for PIO transfers and events
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* @wake_tasklet: Bottom half for incoming wake events
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* @wkin_cken: Keep track of clock references due to the incoming wake line
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* @wk_refcount: Reference count for output wake line
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* @sys_mpu_enable: Context for the interrupt enable register for irq 0
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* @sst: Context for the synchronous serial transmitter
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* @ssr: Context for the synchronous serial receiver
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*/
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struct omap_ssi_port {
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struct device *dev;
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struct device *pdev;
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dma_addr_t sst_dma;
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dma_addr_t ssr_dma;
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void __iomem *sst_base;
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void __iomem *ssr_base;
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spinlock_t wk_lock;
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spinlock_t lock;
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unsigned int channels;
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struct list_head txqueue[SSI_MAX_CHANNELS];
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struct list_head rxqueue[SSI_MAX_CHANNELS];
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struct list_head brkqueue;
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unsigned int irq;
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int wake_irq;
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int wake_gpio;
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struct tasklet_struct pio_tasklet;
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struct tasklet_struct wake_tasklet;
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bool wktest:1; /* FIXME: HACK to be removed */
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bool wkin_cken:1; /* Workaround */
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unsigned int wk_refcount;
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/* OMAP SSI port context */
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u32 sys_mpu_enable; /* We use only one irq */
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struct omap_ssm_ctx sst;
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struct omap_ssm_ctx ssr;
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u32 loss_count;
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u32 port_id;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *dir;
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#endif
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};
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/**
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* struct gdd_trn - GDD transaction data
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* @msg: Pointer to the HSI message being served
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* @sg: Pointer to the current sg entry being served
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*/
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struct gdd_trn {
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struct hsi_msg *msg;
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struct scatterlist *sg;
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};
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/**
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* struct omap_ssi_controller - OMAP SSI controller data
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* @dev: device associated to the controller (HSI controller)
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* @sys: SSI I/O base address
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* @gdd: GDD I/O base address
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* @fck: SSI functional clock
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* @gdd_irq: IRQ line for GDD
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* @gdd_tasklet: bottom half for DMA transfers
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* @gdd_trn: Array of GDD transaction data for ongoing GDD transfers
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* @lock: lock to serialize access to GDD
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* @loss_count: To follow if we need to restore context or not
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* @max_speed: Maximum TX speed (Kb/s) set by the clients.
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* @sysconfig: SSI controller saved context
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* @gdd_gcr: SSI GDD saved context
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* @get_loss: Pointer to omap_pm_get_dev_context_loss_count, if any
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* @port: Array of pointers of the ports of the controller
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* @dir: Debugfs SSI root directory
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*/
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struct omap_ssi_controller {
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struct device *dev;
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void __iomem *sys;
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void __iomem *gdd;
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struct clk *fck;
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unsigned int gdd_irq;
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struct tasklet_struct gdd_tasklet;
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struct gdd_trn gdd_trn[SSI_MAX_GDD_LCH];
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spinlock_t lock;
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unsigned long fck_rate;
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u32 loss_count;
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u32 max_speed;
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/* OMAP SSI Controller context */
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u32 sysconfig;
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u32 gdd_gcr;
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int (*get_loss)(struct device *dev);
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struct omap_ssi_port **port;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *dir;
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#endif
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};
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#endif /* __LINUX_HSI_OMAP_SSI_H__ */
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