[deliverable/linux.git] / arch / arm / mach-pxa / corgi_ssp.c

/*
 *  SSP control code for Sharp Corgi devices
 *
 *  Copyright (c) 2004-2005 Richard Purdie
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>

#include <mach/ssp.h>
#include <mach/pxa2xx-gpio.h>
#include <mach/regs-ssp.h>
#include "sharpsl.h"

static DEFINE_SPINLOCK(corgi_ssp_lock);
static struct ssp_dev corgi_ssp_dev;
static struct ssp_state corgi_ssp_state;
static struct corgissp_machinfo *ssp_machinfo;

/*
 * There are three devices connected to the SSP interface:
 *   1. A touchscreen controller (TI ADS7846 compatible)
 *   2. An LCD controller (with some Backlight functionality)
 *   3. A battery monitoring IC (Maxim MAX1111)
 *
 * Each device uses a different speed/mode of communication.
 *
 * The touchscreen is very sensitive and the most frequently used
 * so the port is left configured for this.
 *
 * Devices are selected using Chip Selects on GPIOs.
 */

/*
 *  ADS7846 Routines
 */
unsigned long corgi_ssp_ads7846_putget(ulong data)
{
	unsigned long flag;
	u32 ret = 0;

	spin_lock_irqsave(&corgi_ssp_lock, flag);
	if (ssp_machinfo->cs_ads7846 >= 0)
		GPCR(ssp_machinfo->cs_ads7846) = GPIO_bit(ssp_machinfo->cs_ads7846);

	ssp_write_word(&corgi_ssp_dev,data);
 	ssp_read_word(&corgi_ssp_dev, &ret);

	if (ssp_machinfo->cs_ads7846 >= 0)
		GPSR(ssp_machinfo->cs_ads7846) = GPIO_bit(ssp_machinfo->cs_ads7846);
	spin_unlock_irqrestore(&corgi_ssp_lock, flag);

	return ret;
}

/*
 * NOTE: These functions should always be called in interrupt context
 * and use the _lock and _unlock functions. They are very time sensitive.
 */
void corgi_ssp_ads7846_lock(void)
{
	spin_lock(&corgi_ssp_lock);
	if (ssp_machinfo->cs_ads7846 >= 0)
		GPCR(ssp_machinfo->cs_ads7846) = GPIO_bit(ssp_machinfo->cs_ads7846);
}

void corgi_ssp_ads7846_unlock(void)
{
	if (ssp_machinfo->cs_ads7846 >= 0)
		GPSR(ssp_machinfo->cs_ads7846) = GPIO_bit(ssp_machinfo->cs_ads7846);
	spin_unlock(&corgi_ssp_lock);
}

void corgi_ssp_ads7846_put(ulong data)
{
	ssp_write_word(&corgi_ssp_dev,data);
}

unsigned long corgi_ssp_ads7846_get(void)
{
	u32 ret = 0;
	ssp_read_word(&corgi_ssp_dev, &ret);
	return ret;
}

EXPORT_SYMBOL(corgi_ssp_ads7846_putget);
EXPORT_SYMBOL(corgi_ssp_ads7846_lock);
EXPORT_SYMBOL(corgi_ssp_ads7846_unlock);
EXPORT_SYMBOL(corgi_ssp_ads7846_put);
EXPORT_SYMBOL(corgi_ssp_ads7846_get);


/*
 *  LCD/Backlight Routines
 */
unsigned long corgi_ssp_dac_put(ulong data)
{
	unsigned long flag, sscr1 = SSCR1_SPH;
	u32 tmp;

	spin_lock_irqsave(&corgi_ssp_lock, flag);

	if (machine_is_spitz() || machine_is_akita() || machine_is_borzoi())
		sscr1 = 0;

	ssp_disable(&corgi_ssp_dev);
	ssp_config(&corgi_ssp_dev, (SSCR0_Motorola | (SSCR0_DSS & 0x07 )), sscr1, 0, SSCR0_SerClkDiv(ssp_machinfo->clk_lcdcon));
	ssp_enable(&corgi_ssp_dev);

	if (ssp_machinfo->cs_lcdcon >= 0)
		GPCR(ssp_machinfo->cs_lcdcon) = GPIO_bit(ssp_machinfo->cs_lcdcon);
	ssp_write_word(&corgi_ssp_dev,data);
	/* Read null data back from device to prevent SSP overflow */
	ssp_read_word(&corgi_ssp_dev, &tmp);
	if (ssp_machinfo->cs_lcdcon >= 0)
		GPSR(ssp_machinfo->cs_lcdcon) = GPIO_bit(ssp_machinfo->cs_lcdcon);

	ssp_disable(&corgi_ssp_dev);
	ssp_config(&corgi_ssp_dev, (SSCR0_National | (SSCR0_DSS & 0x0b )), 0, 0, SSCR0_SerClkDiv(ssp_machinfo->clk_ads7846));
	ssp_enable(&corgi_ssp_dev);

	spin_unlock_irqrestore(&corgi_ssp_lock, flag);

	return 0;
}

void corgi_ssp_lcdtg_send(u8 adrs, u8 data)
{
	corgi_ssp_dac_put(((adrs & 0x07) << 5) | (data & 0x1f));
}

void corgi_ssp_blduty_set(int duty)
{
	corgi_ssp_lcdtg_send(0x02,duty);
}

EXPORT_SYMBOL(corgi_ssp_lcdtg_send);
EXPORT_SYMBOL(corgi_ssp_blduty_set);

/*
 *  Max1111 Routines
 */
int corgi_ssp_max1111_get(ulong data)
{
	unsigned long flag;
	long voltage = 0, voltage1 = 0, voltage2 = 0;

	spin_lock_irqsave(&corgi_ssp_lock, flag);
	if (ssp_machinfo->cs_max1111 >= 0)
		GPCR(ssp_machinfo->cs_max1111) = GPIO_bit(ssp_machinfo->cs_max1111);
	ssp_disable(&corgi_ssp_dev);
	ssp_config(&corgi_ssp_dev, (SSCR0_Motorola | (SSCR0_DSS & 0x07 )), 0, 0, SSCR0_SerClkDiv(ssp_machinfo->clk_max1111));
	ssp_enable(&corgi_ssp_dev);

	udelay(1);

	/* TB1/RB1 */
	ssp_write_word(&corgi_ssp_dev,data);
	ssp_read_word(&corgi_ssp_dev, (u32*)&voltage1); /* null read */

	/* TB12/RB2 */
	ssp_write_word(&corgi_ssp_dev,0);
	ssp_read_word(&corgi_ssp_dev, (u32*)&voltage1);

	/* TB13/RB3*/
	ssp_write_word(&corgi_ssp_dev,0);
	ssp_read_word(&corgi_ssp_dev, (u32*)&voltage2);

	ssp_disable(&corgi_ssp_dev);
	ssp_config(&corgi_ssp_dev, (SSCR0_National | (SSCR0_DSS & 0x0b )), 0, 0, SSCR0_SerClkDiv(ssp_machinfo->clk_ads7846));
	ssp_enable(&corgi_ssp_dev);
	if (ssp_machinfo->cs_max1111 >= 0)
		GPSR(ssp_machinfo->cs_max1111) = GPIO_bit(ssp_machinfo->cs_max1111);
	spin_unlock_irqrestore(&corgi_ssp_lock, flag);

	if (voltage1 & 0xc0 || voltage2 & 0x3f)
		voltage = -1;
	else
		voltage = ((voltage1 << 2) & 0xfc) | ((voltage2 >> 6) & 0x03);

	return voltage;
}

EXPORT_SYMBOL(corgi_ssp_max1111_get);

/*
 *  Support Routines
 */

void __init corgi_ssp_set_machinfo(struct corgissp_machinfo *machinfo)
{
	ssp_machinfo = machinfo;
}

static int __devinit corgi_ssp_probe(struct platform_device *dev)
{
	int ret;

	/* Chip Select - Disable All */
	if (ssp_machinfo->cs_lcdcon >= 0)
		pxa_gpio_mode(ssp_machinfo->cs_lcdcon  | GPIO_OUT | GPIO_DFLT_HIGH);
	if (ssp_machinfo->cs_max1111 >= 0)
	        pxa_gpio_mode(ssp_machinfo->cs_max1111 | GPIO_OUT | GPIO_DFLT_HIGH);
	if (ssp_machinfo->cs_ads7846 >= 0)
        	pxa_gpio_mode(ssp_machinfo->cs_ads7846 | GPIO_OUT | GPIO_DFLT_HIGH);

	ret = ssp_init(&corgi_ssp_dev, ssp_machinfo->port, 0);

	if (ret)
		printk(KERN_ERR "Unable to register SSP handler!\n");
	else {
		ssp_disable(&corgi_ssp_dev);
		ssp_config(&corgi_ssp_dev, (SSCR0_National | (SSCR0_DSS & 0x0b )), 0, 0, SSCR0_SerClkDiv(ssp_machinfo->clk_ads7846));
		ssp_enable(&corgi_ssp_dev);
	}

	return ret;
}

static int corgi_ssp_remove(struct platform_device *dev)
{
	ssp_exit(&corgi_ssp_dev);
	return 0;
}

static int corgi_ssp_suspend(struct platform_device *dev, pm_message_t state)
{
	ssp_flush(&corgi_ssp_dev);
	ssp_save_state(&corgi_ssp_dev,&corgi_ssp_state);

	return 0;
}

static int corgi_ssp_resume(struct platform_device *dev)
{
	if (ssp_machinfo->cs_lcdcon >= 0)
		GPSR(ssp_machinfo->cs_lcdcon) = GPIO_bit(ssp_machinfo->cs_lcdcon);  /* High - Disable LCD Control/Timing Gen */
	if (ssp_machinfo->cs_max1111 >= 0)
		GPSR(ssp_machinfo->cs_max1111) = GPIO_bit(ssp_machinfo->cs_max1111); /* High - Disable MAX1111*/
	if (ssp_machinfo->cs_ads7846 >= 0)
		GPSR(ssp_machinfo->cs_ads7846) = GPIO_bit(ssp_machinfo->cs_ads7846); /* High - Disable ADS7846*/
	ssp_restore_state(&corgi_ssp_dev,&corgi_ssp_state);
	ssp_enable(&corgi_ssp_dev);

	return 0;
}

static struct platform_driver corgissp_driver = {
	.probe		= corgi_ssp_probe,
	.remove		= corgi_ssp_remove,
	.suspend	= corgi_ssp_suspend,
	.resume		= corgi_ssp_resume,
	.driver		= {
		.name	= "corgi-ssp",
	},
};

int __init corgi_ssp_init(void)
{
	return platform_driver_register(&corgissp_driver);
}

arch_initcall(corgi_ssp_init);
Commit	Line	Data
25af3b0f EM	1	/*
	2	* SSP control code for Sharp Corgi devices
	3	*
	4	* Copyright (c) 2004-2005 Richard Purdie
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/init.h>
	14	#include <linux/kernel.h>
	15	#include <linux/sched.h>
25af3b0f EM	16	#include <linux/delay.h>
	17	#include <linux/platform_device.h>
	18	#include <mach/hardware.h>
	19	#include <asm/mach-types.h>
	20
	21	#include <mach/ssp.h>
25af3b0f EM	22	#include <mach/pxa2xx-gpio.h>
	23	#include <mach/regs-ssp.h>
	24	#include "sharpsl.h"
	25
	26	static DEFINE_SPINLOCK(corgi_ssp_lock);
	27	static struct ssp_dev corgi_ssp_dev;
	28	static struct ssp_state corgi_ssp_state;
	29	static struct corgissp_machinfo *ssp_machinfo;
	30
	31	/*
	32	* There are three devices connected to the SSP interface:
	33	* 1. A touchscreen controller (TI ADS7846 compatible)
	34	* 2. An LCD controller (with some Backlight functionality)
	35	* 3. A battery monitoring IC (Maxim MAX1111)
	36	*
	37	* Each device uses a different speed/mode of communication.
	38	*
	39	* The touchscreen is very sensitive and the most frequently used
	40	* so the port is left configured for this.
	41	*
	42	* Devices are selected using Chip Selects on GPIOs.
	43	*/
	44
	45	/*
	46	* ADS7846 Routines
	47	*/
	48	unsigned long corgi_ssp_ads7846_putget(ulong data)
	49	{
	50	unsigned long flag;
	51	u32 ret = 0;
	52
	53	spin_lock_irqsave(&corgi_ssp_lock, flag);
	54	if (ssp_machinfo->cs_ads7846 >= 0)
	55	GPCR(ssp_machinfo->cs_ads7846) = GPIO_bit(ssp_machinfo->cs_ads7846);
	56
	57	ssp_write_word(&corgi_ssp_dev,data);
	58	ssp_read_word(&corgi_ssp_dev, &ret);
	59
	60	if (ssp_machinfo->cs_ads7846 >= 0)
	61	GPSR(ssp_machinfo->cs_ads7846) = GPIO_bit(ssp_machinfo->cs_ads7846);
	62	spin_unlock_irqrestore(&corgi_ssp_lock, flag);
	63
	64	return ret;
	65	}
	66
	67	/*
	68	* NOTE: These functions should always be called in interrupt context
	69	* and use the _lock and _unlock functions. They are very time sensitive.
	70	*/
	71	void corgi_ssp_ads7846_lock(void)
	72	{
	73	spin_lock(&corgi_ssp_lock);
	74	if (ssp_machinfo->cs_ads7846 >= 0)
	75	GPCR(ssp_machinfo->cs_ads7846) = GPIO_bit(ssp_machinfo->cs_ads7846);
	76	}
	77
	78	void corgi_ssp_ads7846_unlock(void)
	79	{
	80	if (ssp_machinfo->cs_ads7846 >= 0)
	81	GPSR(ssp_machinfo->cs_ads7846) = GPIO_bit(ssp_machinfo->cs_ads7846);
	82	spin_unlock(&corgi_ssp_lock);
	83	}
	84
	85	void corgi_ssp_ads7846_put(ulong data)
86	{
87	ssp_write_word(&corgi_ssp_dev,data);
88	}
89
90	unsigned long corgi_ssp_ads7846_get(void)
91	{
92	u32 ret = 0;
93	ssp_read_word(&corgi_ssp_dev, &ret);
94	return ret;
95	}
96
97	EXPORT_SYMBOL(corgi_ssp_ads7846_putget);
98	EXPORT_SYMBOL(corgi_ssp_ads7846_lock);
99	EXPORT_SYMBOL(corgi_ssp_ads7846_unlock);
100	EXPORT_SYMBOL(corgi_ssp_ads7846_put);
101	EXPORT_SYMBOL(corgi_ssp_ads7846_get);
102
103
104	/*
105	* LCD/Backlight Routines
106	*/
107	unsigned long corgi_ssp_dac_put(ulong data)
108	{
109	unsigned long flag, sscr1 = SSCR1_SPH;
110	u32 tmp;
111
112	spin_lock_irqsave(&corgi_ssp_lock, flag);
113
114	if (machine_is_spitz() \|\| machine_is_akita() \|\| machine_is_borzoi())
115	sscr1 = 0;
116
117	ssp_disable(&corgi_ssp_dev);
118	ssp_config(&corgi_ssp_dev, (SSCR0_Motorola \| (SSCR0_DSS & 0x07 )), sscr1, 0, SSCR0_SerClkDiv(ssp_machinfo->clk_lcdcon));
119	ssp_enable(&corgi_ssp_dev);
120
121	if (ssp_machinfo->cs_lcdcon >= 0)
122	GPCR(ssp_machinfo->cs_lcdcon) = GPIO_bit(ssp_machinfo->cs_lcdcon);
123	ssp_write_word(&corgi_ssp_dev,data);
124	/* Read null data back from device to prevent SSP overflow */
125	ssp_read_word(&corgi_ssp_dev, &tmp);
126	if (ssp_machinfo->cs_lcdcon >= 0)
127	GPSR(ssp_machinfo->cs_lcdcon) = GPIO_bit(ssp_machinfo->cs_lcdcon);
128
129	ssp_disable(&corgi_ssp_dev);
130	ssp_config(&corgi_ssp_dev, (SSCR0_National \| (SSCR0_DSS & 0x0b )), 0, 0, SSCR0_SerClkDiv(ssp_machinfo->clk_ads7846));
131	ssp_enable(&corgi_ssp_dev);
132
133	spin_unlock_irqrestore(&corgi_ssp_lock, flag);
134
135	return 0;
136	}
137
138	void corgi_ssp_lcdtg_send(u8 adrs, u8 data)
139	{
140	corgi_ssp_dac_put(((adrs & 0x07) << 5) \| (data & 0x1f));
141	}
142
143	void corgi_ssp_blduty_set(int duty)
144	{
145	corgi_ssp_lcdtg_send(0x02,duty);
146	}
147
148	EXPORT_SYMBOL(corgi_ssp_lcdtg_send);
149	EXPORT_SYMBOL(corgi_ssp_blduty_set);
150
151	/*
152	* Max1111 Routines
153	*/
154	int corgi_ssp_max1111_get(ulong data)
155	{
156	unsigned long flag;
157	long voltage = 0, voltage1 = 0, voltage2 = 0;
158
159	spin_lock_irqsave(&corgi_ssp_lock, flag);
160	if (ssp_machinfo->cs_max1111 >= 0)
161	GPCR(ssp_machinfo->cs_max1111) = GPIO_bit(ssp_machinfo->cs_max1111);
162	ssp_disable(&corgi_ssp_dev);
163	ssp_config(&corgi_ssp_dev, (SSCR0_Motorola \| (SSCR0_DSS & 0x07 )), 0, 0, SSCR0_SerClkDiv(ssp_machinfo->clk_max1111));
164	ssp_enable(&corgi_ssp_dev);
165
166	udelay(1);
167
168	/* TB1/RB1 */
169	ssp_write_word(&corgi_ssp_dev,data);
170	ssp_read_word(&corgi_ssp_dev, (u32)&voltage1); / null read */
171
172	/* TB12/RB2 */
173	ssp_write_word(&corgi_ssp_dev,0);
174	ssp_read_word(&corgi_ssp_dev, (u32*)&voltage1);
175
176	/* TB13/RB3*/
177	ssp_write_word(&corgi_ssp_dev,0);
178	ssp_read_word(&corgi_ssp_dev, (u32*)&voltage2);
179
180	ssp_disable(&corgi_ssp_dev);
181	ssp_config(&corgi_ssp_dev, (SSCR0_National \| (SSCR0_DSS & 0x0b )), 0, 0, SSCR0_SerClkDiv(ssp_machinfo->clk_ads7846));
182	ssp_enable(&corgi_ssp_dev);
183	if (ssp_machinfo->cs_max1111 >= 0)
184	GPSR(ssp_machinfo->cs_max1111) = GPIO_bit(ssp_machinfo->cs_max1111);
185	spin_unlock_irqrestore(&corgi_ssp_lock, flag);
186
187	if (voltage1 & 0xc0 \|\| voltage2 & 0x3f)
188	voltage = -1;
189	else
190	voltage = ((voltage1 << 2) & 0xfc) \| ((voltage2 >> 6) & 0x03);
191
192	return voltage;
193	}
194
195	EXPORT_SYMBOL(corgi_ssp_max1111_get);
196
197	/*
198	* Support Routines
199	*/
200
201	void __init corgi_ssp_set_machinfo(struct corgissp_machinfo *machinfo)
202	{
203	ssp_machinfo = machinfo;
204	}
205
91a99dfc	206	static int __devinit corgi_ssp_probe(struct platform_device *dev)
25af3b0f EM	207	{
	208	int ret;
	209
	210	/* Chip Select - Disable All */
	211	if (ssp_machinfo->cs_lcdcon >= 0)
	212	pxa_gpio_mode(ssp_machinfo->cs_lcdcon \| GPIO_OUT \| GPIO_DFLT_HIGH);
	213	if (ssp_machinfo->cs_max1111 >= 0)
	214	pxa_gpio_mode(ssp_machinfo->cs_max1111 \| GPIO_OUT \| GPIO_DFLT_HIGH);
	215	if (ssp_machinfo->cs_ads7846 >= 0)
	216	pxa_gpio_mode(ssp_machinfo->cs_ads7846 \| GPIO_OUT \| GPIO_DFLT_HIGH);
	217
	218	ret = ssp_init(&corgi_ssp_dev, ssp_machinfo->port, 0);
	219
	220	if (ret)
	221	printk(KERN_ERR "Unable to register SSP handler!\n");
	222	else {
	223	ssp_disable(&corgi_ssp_dev);
	224	ssp_config(&corgi_ssp_dev, (SSCR0_National \| (SSCR0_DSS & 0x0b )), 0, 0, SSCR0_SerClkDiv(ssp_machinfo->clk_ads7846));
	225	ssp_enable(&corgi_ssp_dev);
	226	}
	227
	228	return ret;
	229	}
	230
	231	static int corgi_ssp_remove(struct platform_device *dev)
	232	{
	233	ssp_exit(&corgi_ssp_dev);
	234	return 0;
	235	}
	236
	237	static int corgi_ssp_suspend(struct platform_device *dev, pm_message_t state)
	238	{
	239	ssp_flush(&corgi_ssp_dev);
	240	ssp_save_state(&corgi_ssp_dev,&corgi_ssp_state);
	241
	242	return 0;
	243	}
	244
	245	static int corgi_ssp_resume(struct platform_device *dev)
	246	{
	247	if (ssp_machinfo->cs_lcdcon >= 0)
	248	GPSR(ssp_machinfo->cs_lcdcon) = GPIO_bit(ssp_machinfo->cs_lcdcon); /* High - Disable LCD Control/Timing Gen */
	249	if (ssp_machinfo->cs_max1111 >= 0)
	250	GPSR(ssp_machinfo->cs_max1111) = GPIO_bit(ssp_machinfo->cs_max1111); /* High - Disable MAX1111*/
	251	if (ssp_machinfo->cs_ads7846 >= 0)
	252	GPSR(ssp_machinfo->cs_ads7846) = GPIO_bit(ssp_machinfo->cs_ads7846); /* High - Disable ADS7846*/
	253	ssp_restore_state(&corgi_ssp_dev,&corgi_ssp_state);
	254	ssp_enable(&corgi_ssp_dev);
	255
	256	return 0;
	257	}
	258
	259	static struct platform_driver corgissp_driver = {
	260	.probe = corgi_ssp_probe,
	261	.remove = corgi_ssp_remove,
	262	.suspend = corgi_ssp_suspend,
	263	.resume = corgi_ssp_resume,
	264	.driver = {
	265	.name = "corgi-ssp",
	266	},
	267	};
	268
	269	int __init corgi_ssp_init(void)
	270	{
271	return platform_driver_register(&corgissp_driver);
272	}
273
274	arch_initcall(corgi_ssp_init);