[mirror_ubuntu-bionic-kernel.git] / drivers / pcmcia / pxa2xx_lubbock.c

/*
 * linux/drivers/pcmcia/pxa2xx_lubbock.c
 *
 * Author:	George Davis
 * Created:	Jan 10, 2002
 * Copyright:	MontaVista Software Inc.
 *
 * 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.
 *
 * Originally based upon linux/drivers/pcmcia/sa1100_neponset.c
 *
 * Lubbock PCMCIA specific routines.
 *
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/delay.h>

#include <mach/hardware.h>
#include <asm/hardware/sa1111.h>
#include <asm/mach-types.h>
#include <mach/lubbock.h>

#include "sa1111_generic.h"

static int
lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
				const socket_state_t *state)
{
	unsigned int pa_dwr_mask, pa_dwr_set, misc_mask, misc_set;
	int ret = 0;

	pa_dwr_mask = pa_dwr_set = misc_mask = misc_set = 0;

	/* Lubbock uses the Maxim MAX1602, with the following connections:
	 *
	 * Socket 0 (PCMCIA):
	 *	MAX1602	Lubbock		Register
	 *	Pin	Signal
	 *	-----	-------		----------------------
	 *	A0VPP	S0_PWR0		SA-1111 GPIO A<0>
	 *	A1VPP	S0_PWR1		SA-1111 GPIO A<1>
	 *	A0VCC	S0_PWR2		SA-1111 GPIO A<2>
	 *	A1VCC	S0_PWR3		SA-1111 GPIO A<3>
	 *	VX	VCC
	 *	VY	+3.3V
	 *	12IN	+12V
	 *	CODE	+3.3V		Cirrus  Code, CODE = High (VY)
	 *
	 * Socket 1 (CF):
	 *	MAX1602	Lubbock		Register
	 *	Pin	Signal
	 *	-----	-------		----------------------
	 *	A0VPP	GND		VPP is not connected
	 *	A1VPP	GND		VPP is not connected
	 *	A0VCC	S1_PWR0		MISC_WR<14>
	 *	A1VCC	S1_PWR1		MISC_WR<15>
	 *	VX	VCC
	 *	VY	+3.3V
	 *	12IN	GND		VPP is not connected
	 *	CODE	+3.3V		Cirrus  Code, CODE = High (VY)
	 *
	 */

 again:
	switch (skt->nr) {
	case 0:
		pa_dwr_mask = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;

		switch (state->Vcc) {
		case 0: /* Hi-Z */
			break;

		case 33: /* VY */
			pa_dwr_set |= GPIO_A3;
			break;

		case 50: /* VX */
			pa_dwr_set |= GPIO_A2;
			break;

		default:
			printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
			       __func__, state->Vcc);
			ret = -1;
		}

		switch (state->Vpp) {
		case 0: /* Hi-Z */
			break;

		case 120: /* 12IN */
			pa_dwr_set |= GPIO_A1;
			break;

		default: /* VCC */
			if (state->Vpp == state->Vcc)
				pa_dwr_set |= GPIO_A0;
			else {
				printk(KERN_ERR "%s(): unrecognized Vpp %u\n",
				       __func__, state->Vpp);
				ret = -1;
				break;
			}
		}
		break;

	case 1:
		misc_mask = (1 << 15) | (1 << 14);

		switch (state->Vcc) {
		case 0: /* Hi-Z */
			break;

		case 33: /* VY */
			misc_set |= 1 << 15;
			break;

		case 50: /* VX */
			misc_set |= 1 << 14;
			break;

		default:
			printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
			       __func__, state->Vcc);
			ret = -1;
			break;
		}

		if (state->Vpp != state->Vcc && state->Vpp != 0) {
			printk(KERN_ERR "%s(): CF slot cannot support Vpp %u\n",
			       __func__, state->Vpp);
			ret = -1;
			break;
		}
		break;

	default:
		ret = -1;
	}

	if (ret == 0)
		ret = sa1111_pcmcia_configure_socket(skt, state);

	if (ret == 0) {
		lubbock_set_misc_wr(misc_mask, misc_set);
		sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set);
	}

#if 1
	if (ret == 0 && state->Vcc == 33) {
		struct pcmcia_state new_state;

		/*
		 * HACK ALERT:
		 * We can't sense the voltage properly on Lubbock before
		 * actually applying some power to the socket (catch 22).
		 * Resense the socket Voltage Sense pins after applying
		 * socket power.
		 *
		 * Note: It takes about 2.5ms for the MAX1602 VCC output
		 * to rise.
		 */
		mdelay(3);

		sa1111_pcmcia_socket_state(skt, &new_state);

		if (!new_state.vs_3v && !new_state.vs_Xv) {
			/*
			 * Switch to 5V,  Configure socket with 5V voltage
			 */
			lubbock_set_misc_wr(misc_mask, 0);
			sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, 0);

			/*
			 * It takes about 100ms to turn off Vcc.
			 */
			mdelay(100);

			/*
			 * We need to hack around the const qualifier as
			 * well to keep this ugly workaround localized and
			 * not force it to the rest of the code. Barf bags
			 * avaliable in the seat pocket in front of you!
			 */
			((socket_state_t *)state)->Vcc = 50;
			((socket_state_t *)state)->Vpp = 50;
			goto again;
		}
	}
#endif

	return ret;
}

static struct pcmcia_low_level lubbock_pcmcia_ops = {
	.owner			= THIS_MODULE,
	.hw_init		= sa1111_pcmcia_hw_init,
	.hw_shutdown		= sa1111_pcmcia_hw_shutdown,
	.socket_state		= sa1111_pcmcia_socket_state,
	.configure_socket	= lubbock_pcmcia_configure_socket,
	.socket_init		= sa1111_pcmcia_socket_init,
	.socket_suspend		= sa1111_pcmcia_socket_suspend,
	.first			= 0,
	.nr			= 2,
};

#include "pxa2xx_base.h"

int pcmcia_lubbock_init(struct sa1111_dev *sadev)
{
	int ret = -ENODEV;

	if (machine_is_lubbock()) {
		/*
		 * Set GPIO_A<3:0> to be outputs for the MAX1600,
		 * and switch to standby mode.
		 */
		sa1111_set_io_dir(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0, 0);
		sa1111_set_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);
		sa1111_set_sleep_io(sadev, GPIO_A0|GPIO_A1|GPIO_A2|GPIO_A3, 0);

		/* Set CF Socket 1 power to standby mode. */
		lubbock_set_misc_wr((1 << 15) | (1 << 14), 0);

		sadev->dev.platform_data = &lubbock_pcmcia_ops;
		ret = __pxa2xx_drv_pcmcia_probe(&sadev->dev);
	}

	return ret;
}

MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/drivers/pcmcia/pxa2xx_lubbock.c
	3	*
	4	* Author: George Davis
	5	* Created: Jan 10, 2002
	6	* Copyright: MontaVista Software Inc.
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*
	12	* Originally based upon linux/drivers/pcmcia/sa1100_neponset.c
	13	*
	14	* Lubbock PCMCIA specific routines.
	15	*
	16	*/
	17	#include <linux/module.h>
	18	#include <linux/kernel.h>
1da177e4 LT	19	#include <linux/device.h>
	20	#include <linux/errno.h>
	21	#include <linux/init.h>
	22	#include <linux/delay.h>
	23
a09e64fb	24	#include <mach/hardware.h>
1da177e4 LT	25	#include <asm/hardware/sa1111.h>
1da177e4 LT	26	#include <asm/mach-types.h>
a09e64fb	27	#include <mach/lubbock.h>
1da177e4 LT	28
	29	#include "sa1111_generic.h"
	30
1da177e4 LT	31	static int
	32	lubbock_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
	33	const socket_state_t *state)
	34	{
	35	unsigned int pa_dwr_mask, pa_dwr_set, misc_mask, misc_set;
	36	int ret = 0;
	37
	38	pa_dwr_mask = pa_dwr_set = misc_mask = misc_set = 0;
	39
	40	/* Lubbock uses the Maxim MAX1602, with the following connections:
	41	*
	42	* Socket 0 (PCMCIA):
	43	* MAX1602 Lubbock Register
	44	* Pin Signal
	45	* ----- ------- ----------------------
	46	* A0VPP S0_PWR0 SA-1111 GPIO A<0>
	47	* A1VPP S0_PWR1 SA-1111 GPIO A<1>
	48	* A0VCC S0_PWR2 SA-1111 GPIO A<2>
	49	* A1VCC S0_PWR3 SA-1111 GPIO A<3>
	50	* VX VCC
	51	* VY +3.3V
	52	* 12IN +12V
	53	* CODE +3.3V Cirrus Code, CODE = High (VY)
	54	*
	55	* Socket 1 (CF):
	56	* MAX1602 Lubbock Register
	57	* Pin Signal
	58	* ----- ------- ----------------------
	59	* A0VPP GND VPP is not connected
	60	* A1VPP GND VPP is not connected
	61	* A0VCC S1_PWR0 MISC_WR<14>
	62	* A1VCC S1_PWR1 MISC_WR<15>
	63	* VX VCC
	64	* VY +3.3V
	65	* 12IN GND VPP is not connected
	66	* CODE +3.3V Cirrus Code, CODE = High (VY)
	67	*
	68	*/
	69
	70	again:
	71	switch (skt->nr) {
	72	case 0:
	73	pa_dwr_mask = GPIO_A0 \| GPIO_A1 \| GPIO_A2 \| GPIO_A3;
	74
	75	switch (state->Vcc) {
	76	case 0: /* Hi-Z */
	77	break;
	78
	79	case 33: /* VY */
	80	pa_dwr_set \|= GPIO_A3;
	81	break;
	82
	83	case 50: /* VX */
	84	pa_dwr_set \|= GPIO_A2;
	85	break;
	86
	87	default:
	88	printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
2e11cb4c	89	__func__, state->Vcc);
1da177e4 LT	90	ret = -1;
	91	}
	92
	93	switch (state->Vpp) {
	94	case 0: /* Hi-Z */
	95	break;
	96
	97	case 120: /* 12IN */
	98	pa_dwr_set \|= GPIO_A1;
	99	break;
	100
	101	default: /* VCC */
	102	if (state->Vpp == state->Vcc)
	103	pa_dwr_set \|= GPIO_A0;
	104	else {
	105	printk(KERN_ERR "%s(): unrecognized Vpp %u\n",
2e11cb4c	106	__func__, state->Vpp);
1da177e4 LT	107	ret = -1;
	108	break;
	109	}
	110	}
	111	break;
	112
	113	case 1:
	114	misc_mask = (1 << 15) \| (1 << 14);
	115
	116	switch (state->Vcc) {
	117	case 0: /* Hi-Z */
	118	break;
	119
	120	case 33: /* VY */
	121	misc_set \|= 1 << 15;
	122	break;
	123
	124	case 50: /* VX */
	125	misc_set \|= 1 << 14;
	126	break;
	127
	128	default:
	129	printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
2e11cb4c	130	__func__, state->Vcc);
1da177e4 LT	131	ret = -1;
	132	break;
	133	}
	134
	135	if (state->Vpp != state->Vcc && state->Vpp != 0) {
	136	printk(KERN_ERR "%s(): CF slot cannot support Vpp %u\n",
2e11cb4c	137	__func__, state->Vpp);
1da177e4 LT	138	ret = -1;
	139	break;
	140	}
	141	break;
	142
	143	default:
	144	ret = -1;
	145	}
	146
	147	if (ret == 0)
	148	ret = sa1111_pcmcia_configure_socket(skt, state);
	149
	150	if (ret == 0) {
	151	lubbock_set_misc_wr(misc_mask, misc_set);
	152	sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, pa_dwr_set);
	153	}
	154
	155	#if 1
	156	if (ret == 0 && state->Vcc == 33) {
	157	struct pcmcia_state new_state;
	158
	159	/*
	160	* HACK ALERT:
	161	* We can't sense the voltage properly on Lubbock before
	162	* actually applying some power to the socket (catch 22).
	163	* Resense the socket Voltage Sense pins after applying
	164	* socket power.
	165	*
	166	* Note: It takes about 2.5ms for the MAX1602 VCC output
	167	* to rise.
	168	*/
	169	mdelay(3);
	170
	171	sa1111_pcmcia_socket_state(skt, &new_state);
	172
	173	if (!new_state.vs_3v && !new_state.vs_Xv) {
	174	/*
	175	* Switch to 5V, Configure socket with 5V voltage
	176	*/
	177	lubbock_set_misc_wr(misc_mask, 0);
	178	sa1111_set_io(SA1111_DEV(skt->dev), pa_dwr_mask, 0);
	179
	180	/*
	181	* It takes about 100ms to turn off Vcc.
	182	*/
	183	mdelay(100);
	184
	185	/*
	186	* We need to hack around the const qualifier as
	187	* well to keep this ugly workaround localized and
	188	* not force it to the rest of the code. Barf bags
	189	* avaliable in the seat pocket in front of you!
	190	*/
	191	((socket_state_t *)state)->Vcc = 50;
	192	((socket_state_t *)state)->Vpp = 50;
	193	goto again;
	194	}
	195	}
	196	#endif
	197
	198	return ret;
	199	}
	200
	201	static struct pcmcia_low_level lubbock_pcmcia_ops = {
202	.owner = THIS_MODULE,
693d9d95	203	.hw_init = sa1111_pcmcia_hw_init,
1da177e4 LT	204	.hw_shutdown = sa1111_pcmcia_hw_shutdown,
	205	.socket_state = sa1111_pcmcia_socket_state,
	206	.configure_socket = lubbock_pcmcia_configure_socket,
	207	.socket_init = sa1111_pcmcia_socket_init,
	208	.socket_suspend = sa1111_pcmcia_socket_suspend,
	209	.first = 0,
	210	.nr = 2,
	211	};
	212
	213	#include "pxa2xx_base.h"
	214
7bbaac12	215	int pcmcia_lubbock_init(struct sa1111_dev *sadev)
1da177e4 LT	216	{
	217	int ret = -ENODEV;
	218
	219	if (machine_is_lubbock()) {
	220	/*
	221	* Set GPIO_A<3:0> to be outputs for the MAX1600,
	222	* and switch to standby mode.
	223	*/
	224	sa1111_set_io_dir(sadev, GPIO_A0\|GPIO_A1\|GPIO_A2\|GPIO_A3, 0, 0);
	225	sa1111_set_io(sadev, GPIO_A0\|GPIO_A1\|GPIO_A2\|GPIO_A3, 0);
	226	sa1111_set_sleep_io(sadev, GPIO_A0\|GPIO_A1\|GPIO_A2\|GPIO_A3, 0);
	227
	228	/* Set CF Socket 1 power to standby mode. */
	229	lubbock_set_misc_wr((1 << 15) \| (1 << 14), 0);
	230
	231	sadev->dev.platform_data = &lubbock_pcmcia_ops;
9468613b	232	ret = __pxa2xx_drv_pcmcia_probe(&sadev->dev);
1da177e4 LT	233	}
	234
	235	return ret;
	236	}
	237
	238	MODULE_LICENSE("GPL");