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Commit 3033ee62 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Lee Jones
Browse files

mfd: Remove obsolete ti-ssp driver 



The tnetv107x platform is getting removed, so this driver
is not needed any more.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarSekhar Nori <nsekhar@ti.com>
Acked-by: default avatarKevin Hilman <khilman@linaro.org>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent b6ab7a8f

drivers/mfd/Kconfig

+0 −11
Original line number Diff line number Diff line
@@ -789,17 +789,6 @@ config MFD_PALMAS 
	  If you say yes here you get support for the Palmas

	  series of PMIC chips from Texas Instruments.



config MFD_TI_SSP

	tristate "TI Sequencer Serial Port support"

	depends on ARCH_DAVINCI_TNETV107X

	select MFD_CORE

	---help---

	  Say Y here if you want support for the Sequencer Serial Port

	  in a Texas Instruments TNETV107X SoC.



	  To compile this driver as a module, choose M here: the

	  module will be called ti-ssp.



config TPS6105X

	tristate "TI TPS61050/61052 Boost Converters"

	depends on I2C

drivers/mfd/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -23,7 +23,6 @@ obj-$(CONFIG_HTC_I2CPLD) += htc-i2cpld.o 


obj-$(CONFIG_MFD_DAVINCI_VOICECODEC)	+= davinci_voicecodec.o

obj-$(CONFIG_MFD_DM355EVM_MSP)	+= dm355evm_msp.o

obj-$(CONFIG_MFD_TI_SSP)	+= ti-ssp.o

obj-$(CONFIG_MFD_TI_AM335X_TSCADC)	+= ti_am335x_tscadc.o



obj-$(CONFIG_MFD_STA2X11)	+= sta2x11-mfd.o

drivers/mfd/ti-ssp.c

deleted100644 → 0
+0 −464
Original line number Diff line number Diff line 
/*

 * Sequencer Serial Port (SSP) driver for Texas Instruments' SoCs

 *

 * Copyright (C) 2010 Texas Instruments Inc

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */



#include <linux/errno.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/err.h>

#include <linux/wait.h>

#include <linux/clk.h>

#include <linux/interrupt.h>

#include <linux/device.h>

#include <linux/spinlock.h>

#include <linux/platform_device.h>

#include <linux/delay.h>

#include <linux/io.h>

#include <linux/sched.h>

#include <linux/mfd/core.h>

#include <linux/mfd/ti_ssp.h>



/* Register Offsets */

#define REG_REV		0x00

#define REG_IOSEL_1	0x04

#define REG_IOSEL_2	0x08

#define REG_PREDIV	0x0c

#define REG_INTR_ST	0x10

#define REG_INTR_EN	0x14

#define REG_TEST_CTRL	0x18



/* Per port registers */

#define PORT_CFG_2	0x00

#define PORT_ADDR	0x04

#define PORT_DATA	0x08

#define PORT_CFG_1	0x0c

#define PORT_STATE	0x10



#define SSP_PORT_CONFIG_MASK	(SSP_EARLY_DIN | SSP_DELAY_DOUT)

#define SSP_PORT_CLKRATE_MASK	0x0f



#define SSP_SEQRAM_WR_EN	BIT(4)

#define SSP_SEQRAM_RD_EN	BIT(5)

#define SSP_START		BIT(15)

#define SSP_BUSY		BIT(10)

#define SSP_PORT_ASL		BIT(7)

#define SSP_PORT_CFO1		BIT(6)



#define SSP_PORT_SEQRAM_SIZE	32



static const int ssp_port_base[]   = {0x040, 0x080};

static const int ssp_port_seqram[] = {0x100, 0x180};



struct ti_ssp {

	struct resource		*res;

	struct device		*dev;

	void __iomem		*regs;

	spinlock_t		lock;

	struct clk		*clk;

	int			irq;

	wait_queue_head_t	wqh;



	/*

	 * Some of the iosel2 register bits always read-back as 0, we need to

	 * remember these values so that we don't clobber previously set

	 * values.

	 */

	u32			iosel2;

};



static inline struct ti_ssp *dev_to_ssp(struct device *dev)

{

	return dev_get_drvdata(dev->parent);

}



static inline int dev_to_port(struct device *dev)

{

	return to_platform_device(dev)->id;

}



/* Register Access Helpers, rmw() functions need to run locked */

static inline u32 ssp_read(struct ti_ssp *ssp, int reg)

{

	return __raw_readl(ssp->regs + reg);

}



static inline void ssp_write(struct ti_ssp *ssp, int reg, u32 val)

{

	__raw_writel(val, ssp->regs + reg);

}



static inline void ssp_rmw(struct ti_ssp *ssp, int reg, u32 mask, u32 bits)

{

	ssp_write(ssp, reg, (ssp_read(ssp, reg) & ~mask) | bits);

}



static inline u32 ssp_port_read(struct ti_ssp *ssp, int port, int reg)

{

	return ssp_read(ssp, ssp_port_base[port] + reg);

}



static inline void ssp_port_write(struct ti_ssp *ssp, int port, int reg,

				  u32 val)

{

	ssp_write(ssp, ssp_port_base[port] + reg, val);

}



static inline void ssp_port_rmw(struct ti_ssp *ssp, int port, int reg,

				u32 mask, u32 bits)

{

	ssp_rmw(ssp, ssp_port_base[port] + reg, mask, bits);

}



static inline void ssp_port_clr_bits(struct ti_ssp *ssp, int port, int reg,

				     u32 bits)

{

	ssp_port_rmw(ssp, port, reg, bits, 0);

}



static inline void ssp_port_set_bits(struct ti_ssp *ssp, int port, int reg,

				     u32 bits)

{

	ssp_port_rmw(ssp, port, reg, 0, bits);

}



/* Called to setup port clock mode, caller must hold ssp->lock */

static int __set_mode(struct ti_ssp *ssp, int port, int mode)

{

	mode &= SSP_PORT_CONFIG_MASK;

	ssp_port_rmw(ssp, port, PORT_CFG_1, SSP_PORT_CONFIG_MASK, mode);



	return 0;

}



int ti_ssp_set_mode(struct device *dev, int mode)

{

	struct ti_ssp *ssp = dev_to_ssp(dev);

	int port = dev_to_port(dev);

	int ret;



	spin_lock(&ssp->lock);

	ret = __set_mode(ssp, port, mode);

	spin_unlock(&ssp->lock);



	return ret;

}

EXPORT_SYMBOL(ti_ssp_set_mode);



/* Called to setup iosel2, caller must hold ssp->lock */

static void __set_iosel2(struct ti_ssp *ssp, u32 mask, u32 val)

{

	ssp->iosel2 = (ssp->iosel2 & ~mask) | val;

	ssp_write(ssp, REG_IOSEL_2, ssp->iosel2);

}



/* Called to setup port iosel, caller must hold ssp->lock */

static void __set_iosel(struct ti_ssp *ssp, int port, u32 iosel)

{

	unsigned val, shift = port ? 16 : 0;



	/* IOSEL1 gets the least significant 16 bits */

	val = ssp_read(ssp, REG_IOSEL_1);

	val &= 0xffff << (port ? 0 : 16);

	val |= (iosel & 0xffff) << (port ? 16 : 0);

	ssp_write(ssp, REG_IOSEL_1, val);



	/* IOSEL2 gets the most significant 16 bits */

	val = (iosel >> 16) & 0x7;

	__set_iosel2(ssp, 0x7 << shift, val << shift);

}



int ti_ssp_set_iosel(struct device *dev, u32 iosel)

{

	struct ti_ssp *ssp = dev_to_ssp(dev);

	int port = dev_to_port(dev);



	spin_lock(&ssp->lock);

	__set_iosel(ssp, port, iosel);

	spin_unlock(&ssp->lock);



	return 0;

}

EXPORT_SYMBOL(ti_ssp_set_iosel);



int ti_ssp_load(struct device *dev, int offs, u32* prog, int len)

{

	struct ti_ssp *ssp = dev_to_ssp(dev);

	int port = dev_to_port(dev);

	int i;



	if (len > SSP_PORT_SEQRAM_SIZE)

		return -ENOSPC;



	spin_lock(&ssp->lock);



	/* Enable SeqRAM access */

	ssp_port_set_bits(ssp, port, PORT_CFG_2, SSP_SEQRAM_WR_EN);



	/* Copy code */

	for (i = 0; i < len; i++) {

		__raw_writel(prog[i], ssp->regs + offs + 4*i +

			     ssp_port_seqram[port]);

	}



	/* Disable SeqRAM access */

	ssp_port_clr_bits(ssp, port, PORT_CFG_2, SSP_SEQRAM_WR_EN);



	spin_unlock(&ssp->lock);



	return 0;

}

EXPORT_SYMBOL(ti_ssp_load);



int ti_ssp_raw_read(struct device *dev)

{

	struct ti_ssp *ssp = dev_to_ssp(dev);

	int port = dev_to_port(dev);

	int shift = port ? 27 : 11;



	return (ssp_read(ssp, REG_IOSEL_2) >> shift) & 0xf;

}

EXPORT_SYMBOL(ti_ssp_raw_read);



int ti_ssp_raw_write(struct device *dev, u32 val)

{

	struct ti_ssp *ssp = dev_to_ssp(dev);

	int port = dev_to_port(dev), shift;



	spin_lock(&ssp->lock);



	shift = port ? 22 : 6;

	val &= 0xf;

	__set_iosel2(ssp, 0xf << shift, val << shift);



	spin_unlock(&ssp->lock);



	return 0;

}

EXPORT_SYMBOL(ti_ssp_raw_write);



static inline int __xfer_done(struct ti_ssp *ssp, int port)

{

	return !(ssp_port_read(ssp, port, PORT_CFG_1) & SSP_BUSY);

}



int ti_ssp_run(struct device *dev, u32 pc, u32 input, u32 *output)

{

	struct ti_ssp *ssp = dev_to_ssp(dev);

	int port = dev_to_port(dev);

	int ret;



	if (pc & ~(0x3f))

		return -EINVAL;



	/* Grab ssp->lock to serialize rmw on ssp registers */

	spin_lock(&ssp->lock);



	ssp_port_write(ssp, port, PORT_ADDR, input >> 16);

	ssp_port_write(ssp, port, PORT_DATA, input & 0xffff);

	ssp_port_rmw(ssp, port, PORT_CFG_1, 0x3f, pc);



	/* grab wait queue head lock to avoid race with the isr */

	spin_lock_irq(&ssp->wqh.lock);



	/* kick off sequence execution in hardware */

	ssp_port_set_bits(ssp, port, PORT_CFG_1, SSP_START);



	/* drop ssp lock; no register writes beyond this */

	spin_unlock(&ssp->lock);



	ret = wait_event_interruptible_locked_irq(ssp->wqh,

						  __xfer_done(ssp, port));

	spin_unlock_irq(&ssp->wqh.lock);



	if (ret < 0)

		return ret;



	if (output) {

		*output = (ssp_port_read(ssp, port, PORT_ADDR) << 16) |

			  (ssp_port_read(ssp, port, PORT_DATA) &  0xffff);

	}



	ret = ssp_port_read(ssp, port, PORT_STATE) & 0x3f; /* stop address */



	return ret;

}

EXPORT_SYMBOL(ti_ssp_run);



static irqreturn_t ti_ssp_interrupt(int irq, void *dev_data)

{

	struct ti_ssp *ssp = dev_data;



	spin_lock(&ssp->wqh.lock);



	ssp_write(ssp, REG_INTR_ST, 0x3);

	wake_up_locked(&ssp->wqh);



	spin_unlock(&ssp->wqh.lock);



	return IRQ_HANDLED;

}



static int ti_ssp_probe(struct platform_device *pdev)

{

	static struct ti_ssp *ssp;

	const struct ti_ssp_data *pdata = dev_get_platdata(&pdev->dev);

	int error = 0, prediv = 0xff, id;

	unsigned long sysclk;

	struct device *dev = &pdev->dev;

	struct mfd_cell cells[2];



	ssp = kzalloc(sizeof(*ssp), GFP_KERNEL);

	if (!ssp) {

		dev_err(dev, "cannot allocate device info\n");

		return -ENOMEM;

	}



	ssp->dev = dev;

	dev_set_drvdata(dev, ssp);



	ssp->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!ssp->res) {

		error = -ENODEV;

		dev_err(dev, "cannot determine register area\n");

		goto error_res;

	}



	if (!request_mem_region(ssp->res->start, resource_size(ssp->res),

				pdev->name)) {

		error = -ENOMEM;

		dev_err(dev, "cannot claim register memory\n");

		goto error_res;

	}



	ssp->regs = ioremap(ssp->res->start, resource_size(ssp->res));

	if (!ssp->regs) {

		error = -ENOMEM;

		dev_err(dev, "cannot map register memory\n");

		goto error_map;

	}



	ssp->clk = clk_get(dev, NULL);

	if (IS_ERR(ssp->clk)) {

		error = PTR_ERR(ssp->clk);

		dev_err(dev, "cannot claim device clock\n");

		goto error_clk;

	}



	ssp->irq = platform_get_irq(pdev, 0);

	if (ssp->irq < 0) {

		error = -ENODEV;

		dev_err(dev, "unknown irq\n");

		goto error_irq;

	}



	error = request_threaded_irq(ssp->irq, NULL, ti_ssp_interrupt, 0,

				     dev_name(dev), ssp);

	if (error < 0) {

		dev_err(dev, "cannot acquire irq\n");

		goto error_irq;

	}



	spin_lock_init(&ssp->lock);

	init_waitqueue_head(&ssp->wqh);



	/* Power on and initialize SSP */

	error = clk_enable(ssp->clk);

	if (error) {

		dev_err(dev, "cannot enable device clock\n");

		goto error_enable;

	}



	/* Reset registers to a sensible known state */

	ssp_write(ssp, REG_IOSEL_1, 0);

	ssp_write(ssp, REG_IOSEL_2, 0);

	ssp_write(ssp, REG_INTR_EN, 0x3);

	ssp_write(ssp, REG_INTR_ST, 0x3);

	ssp_write(ssp, REG_TEST_CTRL, 0);

	ssp_port_write(ssp, 0, PORT_CFG_1, SSP_PORT_ASL);

	ssp_port_write(ssp, 1, PORT_CFG_1, SSP_PORT_ASL);

	ssp_port_write(ssp, 0, PORT_CFG_2, SSP_PORT_CFO1);

	ssp_port_write(ssp, 1, PORT_CFG_2, SSP_PORT_CFO1);



	sysclk = clk_get_rate(ssp->clk);

	if (pdata && pdata->out_clock)

		prediv = (sysclk / pdata->out_clock) - 1;

	prediv = clamp(prediv, 0, 0xff);

	ssp_rmw(ssp, REG_PREDIV, 0xff, prediv);



	memset(cells, 0, sizeof(cells));

	for (id = 0; id < 2; id++) {

		const struct ti_ssp_dev_data *data = &pdata->dev_data[id];



		cells[id].id		= id;

		cells[id].name		= data->dev_name;

		cells[id].platform_data	= data->pdata;

	}



	error = mfd_add_devices(dev, 0, cells, 2, NULL, 0, NULL);

	if (error < 0) {

		dev_err(dev, "cannot add mfd cells\n");

		goto error_enable;

	}



	return 0;



error_enable:

	free_irq(ssp->irq, ssp);

error_irq:

	clk_put(ssp->clk);

error_clk:

	iounmap(ssp->regs);

error_map:

	release_mem_region(ssp->res->start, resource_size(ssp->res));

error_res:

	kfree(ssp);

	return error;

}



static int ti_ssp_remove(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	struct ti_ssp *ssp = dev_get_drvdata(dev);



	mfd_remove_devices(dev);

	clk_disable(ssp->clk);

	free_irq(ssp->irq, ssp);

	clk_put(ssp->clk);

	iounmap(ssp->regs);

	release_mem_region(ssp->res->start, resource_size(ssp->res));

	kfree(ssp);

	return 0;

}



static struct platform_driver ti_ssp_driver = {

	.probe		= ti_ssp_probe,

	.remove		= ti_ssp_remove,

	.driver		= {

		.name	= "ti-ssp",

		.owner	= THIS_MODULE,

	}

};



module_platform_driver(ti_ssp_driver);



MODULE_DESCRIPTION("Sequencer Serial Port (SSP) Driver");

MODULE_AUTHOR("Cyril Chemparathy");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:ti-ssp");